18c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/*- 28c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 58c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 68c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Redistribution and use in source and binary forms, with or without 78c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * modification, are permitted provided that the following conditions are met: 88c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 98c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * a) Redistributions of source code must retain the above copyright notice, 100ac02f34d6041cd0018437596a5a9a94685e6919tuexen * this list of conditions and the following disclaimer. 118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * b) Redistributions in binary form must reproduce the above copyright 138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * notice, this list of conditions and the following disclaimer in 140ac02f34d6041cd0018437596a5a9a94685e6919tuexen * the documentation and/or other materials provided with the distribution. 158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * c) Neither the name of Cisco Systems, Inc. nor the names of its 178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * contributors may be used to endorse or promote products derived 188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * from this software without specific prior written permission. 198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * THE POSSIBILITY OF SUCH DAMAGE. 318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 33ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen#ifdef __FreeBSD__ 34ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen#include <sys/cdefs.h> 35a7e2a63200c3155382d862ceb5cf07a1176ee531t__FBSDID("$FreeBSD: head/sys/netinet/sctp_cc_functions.c 240158 2012-09-06 07:03:56Z tuexen $"); 36ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen#endif 37ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen 388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_os.h> 398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_var.h> 408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_sysctl.h> 418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_pcb.h> 428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_header.h> 438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctputil.h> 448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_output.h> 458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_input.h> 468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_indata.h> 478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_uio.h> 488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_timer.h> 498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_auth.h> 508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_asconf.h> 51f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_dtrace_declare.h> 53b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#define SHIFT_MPTCP_MULTI_N 40 568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#define SHIFT_MPTCP_MULTI_Z 16 578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#define SHIFT_MPTCP_MULTI 8 588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net) 618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *assoc; 638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t cwnd_in_mtu; 648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen assoc = &stcb->asoc; 668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cwnd_in_mtu = SCTP_BASE_SYSCTL(sctp_initial_cwnd); 678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cwnd_in_mtu == 0) { 688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Using 0 means that the value of RFC 4960 is used. */ 698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); 708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * We take the minimum of the burst limit and the 738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * initial congestion window. 748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((assoc->max_burst > 0) && (cwnd_in_mtu > assoc->max_burst)) 768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cwnd_in_mtu = assoc->max_burst; 778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = (net->mtu - sizeof(struct sctphdr)) * cwnd_in_mtu; 788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((stcb->asoc.sctp_cmt_on_off == SCTP_CMT_RPV1) || 808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->asoc.sctp_cmt_on_off == SCTP_CMT_RPV2)) { 818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* In case of resource pooling initialize appropriately */ 828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd /= assoc->numnets; 838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd < (net->mtu - sizeof(struct sctphdr))) { 848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->mtu - sizeof(struct sctphdr); 858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = assoc->peers_rwnd; 88f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, init, 90b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen stcb->asoc.my_vtag, ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), net, 918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 0, net->cwnd); 92b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & 948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (SCTP_CWND_MONITOR_ENABLE|SCTP_CWND_LOGGING_ENABLE)) { 958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION); 968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 1008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_fr(struct sctp_tcb *stcb, 1018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc) 1028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net; 1048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t t_ssthresh, t_cwnd; 1058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t t_ucwnd_sbw; 1068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* MT FIXME: Don't compute this over and over again */ 1088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ssthresh = 0; 1098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_cwnd = 0; 1108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw = 0; 1118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((asoc->sctp_cmt_on_off == SCTP_CMT_RPV1) || 1128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off == SCTP_CMT_RPV2)) { 1138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 1148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ssthresh += net->ssthresh; 1158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_cwnd += net->cwnd; 1168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->lastsa > 0) { 1178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw += (uint64_t)net->cwnd / (uint64_t)net->lastsa; 1188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (t_ucwnd_sbw == 0) { 1218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw = 1; 1228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /*- 1268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery code. Need to debug. ((sctp_cmt_on_off > 0) && 1278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * (net->fast_retran_loss_recovery == 0))) 1288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 1298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 1308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((asoc->fast_retran_loss_recovery == 0) || 1318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off > 0)) { 1328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* out of a RFC2582 Fast recovery window? */ 1338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack > 0) { 1348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 1358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * per section 7.2.3, are there any 1368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * destinations that had a fast retransmit 1378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * to them. If so what we need to do is 1388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * adjust ssthresh and cwnd. 1398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 1408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_tmit_chunk *lchk; 1418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 1428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((asoc->sctp_cmt_on_off == SCTP_CMT_RPV1) || 1448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off == SCTP_CMT_RPV2)) { 1458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (asoc->sctp_cmt_on_off == SCTP_CMT_RPV1) { 1468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = (uint32_t)(((uint64_t)4 * 1478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->mtu * 1488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->ssthresh) / 1498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)t_ssthresh); 1508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (asoc->sctp_cmt_on_off == SCTP_CMT_RPV2) { 1538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t srtt; 1548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = net->lastsa; 1568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* lastsa>>3; we don't need to devide ...*/ 1578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (srtt == 0) { 1588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = 1; 1598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Short Version => Equal to Contel Version MBe */ 1618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = (uint32_t) (((uint64_t)4 * 1628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->mtu * 1638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->cwnd) / 1648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((uint64_t)srtt * 1658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw)); 1668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* INCREASE FACTOR */; 1678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cwnd > t_cwnd / 2) && 1698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (net->ssthresh < net->cwnd - t_cwnd / 2)) { 1708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd - t_cwnd / 2; 1718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ssthresh < net->mtu) { 1738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->mtu; 1748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 1768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd / 2; 1778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ssthresh < (net->mtu * 2)) { 1788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = 2 * net->mtu; 1798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->ssthresh; 182f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 183000a5bac556b28e74e4e98c540f66b1743e9312dtuexen SDT_PROBE(sctp, cwnd, net, fr, 184000a5bac556b28e74e4e98c540f66b1743e9312dtuexen stcb->asoc.my_vtag, ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), net, 1858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 186b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 1878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 1888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), 1898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_FR); 1908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen lchk = TAILQ_FIRST(&asoc->send_queue); 1928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 1948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Turn on fast recovery window */ 1958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_retran_loss_recovery = 1; 1968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (lchk == NULL) { 1978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Mark end of the window */ 1988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_recovery_tsn = asoc->sending_seq - 1; 1998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 2008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_recovery_tsn = lchk->rec.data.TSN_seq - 1; 2018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 2048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery -- per destination 2058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * recovery variable. 2068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 2078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_retran_loss_recovery = 1; 2088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (lchk == NULL) { 2108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Mark end of the window */ 2118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_recovery_tsn = asoc->sending_seq - 1; 2128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 2138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_recovery_tsn = lchk->rec.data.TSN_seq - 1; 2148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_timer_stop(SCTP_TIMER_TYPE_SEND, 2178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INDATA+SCTP_LOC_32 ); 2188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_timer_start(SCTP_TIMER_TYPE_SEND, 2198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->sctp_ep, stcb, net); 2208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (net->net_ack > 0) { 2228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 2238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Mark a peg that we WOULD have done a cwnd 2248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * reduction but RFC2582 prevented this action. 2258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 2268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_STAT_INCR(sctps_fastretransinrtt); 2278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 2308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/* Defines for instantaneous bw decisions */ 2328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#define SCTP_INST_LOOSING 1 /* Loosing to other flows */ 2338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#define SCTP_INST_NEUTRAL 2 /* Neutral, no indication */ 2348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#define SCTP_INST_GAINING 3 /* Gaining, step down possible */ 2358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 237f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 2388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic int 239000a5bac556b28e74e4e98c540f66b1743e9312dtuexencc_bw_same(struct sctp_tcb *stcb, struct sctp_nets *net, uint64_t nbw, 2408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t rtt_offset, uint64_t vtag, uint8_t inst_ind) 2410ac02f34d6041cd0018437596a5a9a94685e6919tuexen#else 2420ac02f34d6041cd0018437596a5a9a94685e6919tuexenstatic int 243000a5bac556b28e74e4e98c540f66b1743e9312dtuexencc_bw_same(struct sctp_tcb *stcb SCTP_UNUSED, struct sctp_nets *net, uint64_t nbw, 244b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen uint64_t rtt_offset, uint8_t inst_ind) 2450ac02f34d6041cd0018437596a5a9a94685e6919tuexen#endif 2468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 247f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 2488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t oth, probepoint; 249b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 250000a5bac556b28e74e4e98c540f66b1743e9312dtuexen 251f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 2528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint = (((uint64_t)net->cwnd) << 32); 253b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 2540ac02f34d6041cd0018437596a5a9a94685e6919tuexen if (net->rtt > net->cc_mod.rtcc.lbw_rtt + rtt_offset) { 2558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 256000a5bac556b28e74e4e98c540f66b1743e9312dtuexen * rtt increased 2578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * we don't update bw.. so we don't 2588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * update the rtt either. 2598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 260f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 2618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Probe point 5 */ 2628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((5 << 16) | 1); 2638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 2648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 2658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 2668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 2678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 2688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 269b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 2708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.steady_step) && (inst_ind != SCTP_INST_LOOSING)) { 2718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.last_step_state == 5) 2728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt++; 273000a5bac556b28e74e4e98c540f66b1743e9312dtuexen else 2748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 1; 2758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 5; 2768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.step_cnt == net->cc_mod.rtcc.steady_step) || 2778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.step_cnt > net->cc_mod.rtcc.steady_step) && 2788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.step_cnt % net->cc_mod.rtcc.steady_step) == 0))) { 2798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Try a step down */ 280f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 2818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth = net->cc_mod.rtcc.vol_reduce; 2828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 2838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.step_cnt; 2848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 2858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.last_step_state; 2868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttstep, 2878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 2888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 2898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 2908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth, 2918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 292b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 2938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd > (4 * net->mtu)) { 2948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd -= net->mtu; 2958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce++; 2968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 2978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 2988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 3028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->rtt < net->cc_mod.rtcc.lbw_rtt-rtt_offset) { 3048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 3058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * rtt decreased, there could be more room. 3068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * we update both the bw and the rtt here to 3078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * lock this in as a good step down. 3088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 309f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 3108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Probe point 6 */ 3118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((6 << 16) | 0); 3128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 3138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 3148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 3158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 3168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 3178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 318b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 3198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.steady_step) { 320f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 3218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth = net->cc_mod.rtcc.vol_reduce; 3228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 3238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.step_cnt; 3248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 3258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.last_step_state; 3268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttstep, 3278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 3288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 3298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 3308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth, 3318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 332b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 3338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.last_step_state == 5) && 3348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (net->cc_mod.rtcc.step_cnt > net->cc_mod.rtcc.steady_step)) { 3358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Step down worked */ 3368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 3378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 3388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 3398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 6; 3408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 3418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw = nbw; 3448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw_rtt = net->rtt; 3458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.cwnd_at_bw_set = net->cwnd; 3468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (inst_ind == SCTP_INST_GAINING) 3478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 348000a5bac556b28e74e4e98c540f66b1743e9312dtuexen else if (inst_ind == SCTP_INST_NEUTRAL) 3498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 3508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else 3518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (0); 3528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 353000a5bac556b28e74e4e98c540f66b1743e9312dtuexen /* Ok bw and rtt remained the same .. no update to any 3548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 355f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 3568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Probe point 7 */ 3578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((7 << 16) | net->cc_mod.rtcc.ret_from_eq); 3588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 3598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 3608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 3618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 3628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 3638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 364b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 3658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.steady_step) && (inst_ind != SCTP_INST_LOOSING)) { 3668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.last_step_state == 5) 3678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt++; 368000a5bac556b28e74e4e98c540f66b1743e9312dtuexen else 3698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 1; 3708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 5; 3718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.step_cnt == net->cc_mod.rtcc.steady_step) || 3728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.step_cnt > net->cc_mod.rtcc.steady_step) && 3738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.step_cnt % net->cc_mod.rtcc.steady_step) == 0))) { 3748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Try a step down */ 3758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd > (4 * net->mtu)) { 3768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd -= net->mtu; 3778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce++; 3788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 3798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 3808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 3818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (inst_ind == SCTP_INST_GAINING) 3858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 386000a5bac556b28e74e4e98c540f66b1743e9312dtuexen else if (inst_ind == SCTP_INST_NEUTRAL) 3878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 3888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else 3898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return ((int)net->cc_mod.rtcc.ret_from_eq); 3908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 3918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 392f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 3938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic int 394000a5bac556b28e74e4e98c540f66b1743e9312dtuexencc_bw_decrease(struct sctp_tcb *stcb, struct sctp_nets *net, uint64_t nbw, uint64_t rtt_offset, 3958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t vtag, uint8_t inst_ind) 3960ac02f34d6041cd0018437596a5a9a94685e6919tuexen#else 3970ac02f34d6041cd0018437596a5a9a94685e6919tuexenstatic int 398000a5bac556b28e74e4e98c540f66b1743e9312dtuexencc_bw_decrease(struct sctp_tcb *stcb SCTP_UNUSED, struct sctp_nets *net, uint64_t nbw, uint64_t rtt_offset, 399b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen uint8_t inst_ind) 4000ac02f34d6041cd0018437596a5a9a94685e6919tuexen#endif 4018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 402f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 4038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t oth, probepoint; 404b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 405b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen 4068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Bandwidth decreased.*/ 407f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 4088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint = (((uint64_t)net->cwnd) << 32); 409b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 4108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->rtt > net->cc_mod.rtcc.lbw_rtt+rtt_offset) { 4118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* rtt increased */ 4128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Did we add more */ 4138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cwnd > net->cc_mod.rtcc.cwnd_at_bw_set) && 414b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen (inst_ind != SCTP_INST_LOOSING)) { 4158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We caused it maybe.. back off? */ 416f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 4178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* PROBE POINT 1 */ 4188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((1 << 16) | 1); 4198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 4208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 4218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 4228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 4238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 4248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 425b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 4268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.ret_from_eq) { 4278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Switch over to CA if we are less aggressive */ 4288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd-1; 4298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 4308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 4318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (1); 4328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 433f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 4348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Probe point 2 */ 4358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((2 << 16) | 0); 4368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 4378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 4388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 4398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 4408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 4418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 442b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 4438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Someone else - fight for more? */ 4448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.steady_step) { 445f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 4468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth = net->cc_mod.rtcc.vol_reduce; 4478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 4488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.step_cnt; 4498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 4508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.last_step_state; 4518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttstep, 4528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 4538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 4548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 4558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth, 4568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 457b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 4588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Did we voluntarily give up some? if so take 459000a5bac556b28e74e4e98c540f66b1743e9312dtuexen * one back please 4608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 461000a5bac556b28e74e4e98c540f66b1743e9312dtuexen if ((net->cc_mod.rtcc.vol_reduce) && 462b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen (inst_ind != SCTP_INST_GAINING)) { 4638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->mtu; 4648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce--; 4658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 4668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 2; 4678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 4688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 4698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen goto out_decision; 4708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (net->rtt < net->cc_mod.rtcc.lbw_rtt-rtt_offset) { 4718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* bw & rtt decreased */ 472f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 4738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Probe point 3 */ 4748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((3 << 16) | 0); 4758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 4768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 4778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 4788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 4798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 4808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 481b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 4828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.steady_step) { 483f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 4848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth = net->cc_mod.rtcc.vol_reduce; 4858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 4868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.step_cnt; 4878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 4888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.last_step_state; 4898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttstep, 4908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 4918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 4928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 4938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth, 4948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 495b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 4968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.vol_reduce) && 497b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen (inst_ind != SCTP_INST_GAINING)) { 4988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->mtu; 4998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce--; 5008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 5018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 3; 5028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 5038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 5048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen goto out_decision; 5058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 5068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* The bw decreased but rtt stayed the same */ 507f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 5088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Probe point 4 */ 5098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((4 << 16) | 0); 5108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 5118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 5128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 5138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 5148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 5158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 516b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 5178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.steady_step) { 518f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 5198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth = net->cc_mod.rtcc.vol_reduce; 5208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 5218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.step_cnt; 5228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 5238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.last_step_state; 5248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttstep, 5258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 5268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 5278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 5288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth, 5298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 530b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 5318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.vol_reduce) && 532b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen (inst_ind != SCTP_INST_GAINING)) { 5338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->mtu; 5348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce--; 5358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 5368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 4; 5378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 5388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 5398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenout_decision: 5408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw = nbw; 5418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw_rtt = net->rtt; 5428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.cwnd_at_bw_set = net->cwnd; 5438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (inst_ind == SCTP_INST_GAINING) { 544b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (1); 5458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 546b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (0); 5478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 5488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 5498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 550f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 5518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic int 5520ac02f34d6041cd0018437596a5a9a94685e6919tuexencc_bw_increase(struct sctp_tcb *stcb, struct sctp_nets *net, uint64_t nbw, uint64_t vtag) 5530ac02f34d6041cd0018437596a5a9a94685e6919tuexen#else 5540ac02f34d6041cd0018437596a5a9a94685e6919tuexenstatic int 555b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexencc_bw_increase(struct sctp_tcb *stcb SCTP_UNUSED, struct sctp_nets *net, uint64_t nbw) 5560ac02f34d6041cd0018437596a5a9a94685e6919tuexen#endif 5578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 558f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 5598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t oth, probepoint; 5600ac02f34d6041cd0018437596a5a9a94685e6919tuexen 561b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 5628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* BW increased, so update and 563000a5bac556b28e74e4e98c540f66b1743e9312dtuexen * return 0, since all actions in 5648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * our table say to do the normal CC 5658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * update. Note that we pay no attention to 5668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * the inst_ind since our overall sum is increasing. 5678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 568f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 5698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* PROBE POINT 0 */ 5708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint = (((uint64_t)net->cwnd) << 32); 5718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 5728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 5738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 5748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 5758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 5768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 577b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 5788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.steady_step) { 579f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 5808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth = net->cc_mod.rtcc.vol_reduce; 5818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 5828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.step_cnt; 5838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth <<= 16; 5848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth |= net->cc_mod.rtcc.last_step_state; 5858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttstep, 5868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 5878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | nbw), 5888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 5898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen oth, 5908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 591b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 5928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 0; 5938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 5948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce = 0; 5958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 5968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw = nbw; 5978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw_rtt = net->rtt; 5988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.cwnd_at_bw_set = net->cwnd; 599b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (0); 6008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 6018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 6028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/* RTCC Algoritm to limit growth of cwnd, return 6038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * true if you want to NOT allow cwnd growth 6048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 6058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic int 6068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexencc_bw_limit(struct sctp_tcb *stcb, struct sctp_nets *net, uint64_t nbw) 6078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 608b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen uint64_t bw_offset, rtt_offset; 609f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 610b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen uint64_t probepoint, rtt, vtag; 611b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 6128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t bytes_for_this_rtt, inst_bw; 6138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t div, inst_off; 6148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int bw_shift; 6158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint8_t inst_ind; 6168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int ret; 617000a5bac556b28e74e4e98c540f66b1743e9312dtuexen /*- 6188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Here we need to see if we want 6198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * to limit cwnd growth due to increase 6208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * in overall rtt but no increase in bw. 6218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * We use the following table to figure 6228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * out what we should do. When we return 6238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 0, cc update goes on as planned. If we 6248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * return 1, then no cc update happens and cwnd 6258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * stays where it is at. 6268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * BW | RTT | Action 6288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ********************************* 6298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * INC | INC | return 0 6308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * INC | SAME | return 0 6328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 633000a5bac556b28e74e4e98c540f66b1743e9312dtuexen * INC | DECR | return 0 6348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * SAME | INC | return 1 6368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * SAME | SAME | return 1 6388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * SAME | DECR | return 0 6408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * DECR | INC | return 0 or 1 based on if we caused. 6428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * DECR | SAME | return 0 6448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * DECR | DECR | return 0 6468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ---------------------------------- 6478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 6488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * We are a bit fuzz on what an increase or 6498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * decrease is. For BW it is the same if 6508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * it did not change within 1/64th. For 6518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * RTT it stayed the same if it did not 6528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * change within 1/32nd 6538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 6548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen bw_shift = SCTP_BASE_SYSCTL(sctp_rttvar_bw); 655f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 6568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen rtt = stcb->asoc.my_vtag; 6578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag = (rtt << 32) | (((uint32_t)(stcb->sctp_ep->sctp_lport)) << 16) | (stcb->rport); 6588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint = (((uint64_t)net->cwnd) << 32); 6598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen rtt = net->rtt; 660b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 6618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.rtt_set_this_sack) { 6628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.rtt_set_this_sack = 0; 6638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen bytes_for_this_rtt = net->cc_mod.rtcc.bw_bytes - net->cc_mod.rtcc.bw_bytes_at_last_rttc; 6648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_bytes_at_last_rttc = net->cc_mod.rtcc.bw_bytes; 6658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->rtt) { 666b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen div = net->rtt / 1000; 6678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (div) { 6688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen inst_bw = bytes_for_this_rtt / div; 6698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen inst_off = inst_bw >> bw_shift; 670000a5bac556b28e74e4e98c540f66b1743e9312dtuexen if (inst_bw > nbw) 671000a5bac556b28e74e4e98c540f66b1743e9312dtuexen inst_ind = SCTP_INST_GAINING; 6728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else if ((inst_bw+inst_off) < nbw) 6738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen inst_ind = SCTP_INST_LOOSING; 6748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else 6758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen inst_ind = SCTP_INST_NEUTRAL; 676f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 6778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((0xb << 16) | inst_ind); 678b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 6798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 680b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen inst_ind = net->cc_mod.rtcc.last_inst_ind; 681f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 6828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen inst_bw = bytes_for_this_rtt / (uint64_t)(net->rtt); 6838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Can't determine do not change */ 6848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((0xc << 16) | inst_ind); 685b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 6868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 6878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 688b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen inst_ind = net->cc_mod.rtcc.last_inst_ind; 689f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 6908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen inst_bw = bytes_for_this_rtt; 6918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Can't determine do not change */ 6928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((0xd << 16) | inst_ind); 693b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 6948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 695f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 6968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 6978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 6988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((nbw << 32) | inst_bw), 6998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | rtt), 7008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 7018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 702b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 7038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 7048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* No rtt measurement, use last one */ 7058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen inst_ind = net->cc_mod.rtcc.last_inst_ind; 7068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 7078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen bw_offset = net->cc_mod.rtcc.lbw >> bw_shift; 708b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen if (nbw > net->cc_mod.rtcc.lbw + bw_offset) { 709f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 7100ac02f34d6041cd0018437596a5a9a94685e6919tuexen ret = cc_bw_increase(stcb, net, nbw, vtag); 711b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#else 712b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ret = cc_bw_increase(stcb, net, nbw); 713b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 7148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen goto out; 7158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 7168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen rtt_offset = net->cc_mod.rtcc.lbw_rtt >> SCTP_BASE_SYSCTL(sctp_rttvar_rtt); 717b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen if (nbw < net->cc_mod.rtcc.lbw - bw_offset) { 718f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 7198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ret = cc_bw_decrease(stcb, net, nbw, rtt_offset, vtag, inst_ind); 720b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#else 721b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ret = cc_bw_decrease(stcb, net, nbw, rtt_offset, inst_ind); 722b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 7238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen goto out; 7248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 7258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* If we reach here then 7268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * we are in a situation where 7278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * the bw stayed the same. 7288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 729f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 7308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ret = cc_bw_same(stcb, net, nbw, rtt_offset, vtag, inst_ind); 731b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#else 732b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ret = cc_bw_same(stcb, net, nbw, rtt_offset, inst_ind); 733b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 7348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenout: 7358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_inst_ind = inst_ind; 736b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (ret); 7378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 7388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 7398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 7408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_sack_common(struct sctp_tcb *stcb, 7418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc, 7420ac02f34d6041cd0018437596a5a9a94685e6919tuexen int accum_moved, int reneged_all SCTP_UNUSED, int will_exit, int use_rtcc) 7438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 7448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net; 745f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 7468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd; 747b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 7488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t t_ssthresh, t_cwnd, incr; 7498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t t_ucwnd_sbw; 7508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t t_path_mptcp; 7518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t mptcp_like_alpha; 7528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t srtt; 7538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t max_path; 7548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 7558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* MT FIXME: Don't compute this over and over again */ 7568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ssthresh = 0; 7578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_cwnd = 0; 7588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw = 0; 7598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_path_mptcp = 0; 7608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen mptcp_like_alpha = 1; 7618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((stcb->asoc.sctp_cmt_on_off == SCTP_CMT_RPV1) || 7628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->asoc.sctp_cmt_on_off == SCTP_CMT_RPV2) || 7638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->asoc.sctp_cmt_on_off == SCTP_CMT_MPTCP)) { 7648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen max_path = 0; 7658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 7668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ssthresh += net->ssthresh; 7678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_cwnd += net->cwnd; 7688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* lastsa>>3; we don't need to devide ...*/ 7698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = net->lastsa; 7708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (srtt > 0) { 7718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t tmp; 7728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 7738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw += (uint64_t)net->cwnd / (uint64_t)srtt; 7748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_path_mptcp += (((uint64_t)net->cwnd) << SHIFT_MPTCP_MULTI_Z) / 7758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (((uint64_t)net->mtu) * (uint64_t)srtt); 7768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen tmp = (((uint64_t)net->cwnd) << SHIFT_MPTCP_MULTI_N) / 7778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((uint64_t)net->mtu * (uint64_t)(srtt * srtt)); 7788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (tmp > max_path) { 7798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen max_path = tmp; 7808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 7818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 7828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 7838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (t_path_mptcp > 0) { 7848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen mptcp_like_alpha = max_path / (t_path_mptcp * t_path_mptcp); 7858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 7868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen mptcp_like_alpha = 1; 7878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 7888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 789b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen if (t_ssthresh == 0) { 790b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen t_ssthresh = 1; 791b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen } 792b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen if (t_ucwnd_sbw == 0) { 793b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen t_ucwnd_sbw = 1; 794b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen } 7958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /******************************/ 7968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* update cwnd and Early FR */ 7978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /******************************/ 7988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 7998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 8008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef JANA_CMT_FAST_RECOVERY 8018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 8028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery code. Need to debug. 8038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 8048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->fast_retran_loss_recovery && net->new_pseudo_cumack) { 8058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_TSN_GE(asoc->last_acked_seq, net->fast_recovery_tsn) || 8068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_TSN_GE(net->pseudo_cumack,net->fast_recovery_tsn)) { 8078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->will_exit_fast_recovery = 1; 8088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 8118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* if nothing was acked on this destination skip it */ 8128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack == 0) { 8138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, 0, SCTP_CWND_LOG_FROM_SACK); 8158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen continue; 8178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef JANA_CMT_FAST_RECOVERY 8198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* CMT fast recovery code 8208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 8218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 8228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (sctp_cmt_on_off > 0 && net->fast_retran_loss_recovery && net->will_exit_fast_recovery == 0) { 8238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen @@@ Do something 8248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else if (sctp_cmt_on_off == 0 && asoc->fast_retran_loss_recovery && will_exit == 0) { 8268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 8278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 8288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 8298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (asoc->fast_retran_loss_recovery && 8308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (will_exit == 0) && 8318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off == 0)) { 8328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 8338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * If we are in loss recovery we skip any cwnd 8348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * update 8358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 8368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return; 8378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 838000a5bac556b28e74e4e98c540f66b1743e9312dtuexen /* 8398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Did any measurements go on for this network? 8408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 8418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (use_rtcc && (net->cc_mod.rtcc.tls_needs_set > 0)) { 8428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t nbw; 843000a5bac556b28e74e4e98c540f66b1743e9312dtuexen /* 844000a5bac556b28e74e4e98c540f66b1743e9312dtuexen * At this point our bw_bytes has been updated 8458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * by incoming sack information. 846000a5bac556b28e74e4e98c540f66b1743e9312dtuexen * 8478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * But our bw may not yet be set. 848000a5bac556b28e74e4e98c540f66b1743e9312dtuexen * 8498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 8508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cc_mod.rtcc.new_tot_time/1000) > 0) { 8518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen nbw = net->cc_mod.rtcc.bw_bytes/(net->cc_mod.rtcc.new_tot_time/1000); 8528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 8538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen nbw = net->cc_mod.rtcc.bw_bytes; 8548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.lbw) { 856b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen if (cc_bw_limit(stcb, net, nbw)) { 8578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Hold here, no update */ 8588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen continue; 8598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 861f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 8628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t vtag, probepoint; 863b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen 8648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint = (((uint64_t)net->cwnd) << 32); 8658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((0xa << 16) | 0); 866000a5bac556b28e74e4e98c540f66b1743e9312dtuexen vtag = (net->rtt << 32) | 8678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (((uint32_t)(stcb->sctp_ep->sctp_lport)) << 16) | 8688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->rport); 8698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 8708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 8718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 8728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen nbw, 8738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 8748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 8758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 876b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 8778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw = nbw; 8788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw_rtt = net->rtt; 8798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.rtt_set_this_sack) { 8808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.rtt_set_this_sack = 0; 8818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_bytes_at_last_rttc = net->cc_mod.rtcc.bw_bytes; 8828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 8858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 8868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT: CUC algorithm. Update cwnd if pseudo-cumack has 8878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * moved. 8888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 8898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (accum_moved || 8908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((asoc->sctp_cmt_on_off > 0) && net->new_pseudo_cumack)) { 8918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* If the cumulative ack moved we can proceed */ 8928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd <= net->ssthresh) { 8938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We are in slow start */ 8948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->flight_size + net->net_ack >= net->cwnd) { 8958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t limit; 8968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 897f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 8988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd = net->cwnd; 899b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 9008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen switch (asoc->sctp_cmt_on_off) { 9018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen case SCTP_CMT_RPV1: 9028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen limit = (uint32_t)(((uint64_t)net->mtu * 9038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)SCTP_BASE_SYSCTL(sctp_L2_abc_variable) * 9048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->ssthresh) / 9058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)t_ssthresh); 9068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = (uint32_t)(((uint64_t)net->net_ack * 9078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->ssthresh) / 9088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)t_ssthresh); 9098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr > limit) { 9108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = limit; 9118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr == 0) { 9138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = 1; 9148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 9168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen case SCTP_CMT_RPV2: 9178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* lastsa>>3; we don't need to divide ...*/ 918000a5bac556b28e74e4e98c540f66b1743e9312dtuexen srtt = net->lastsa; 9198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (srtt == 0) { 9208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = 1; 9218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen limit = (uint32_t)(((uint64_t)net->mtu * 9238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)SCTP_BASE_SYSCTL(sctp_L2_abc_variable) * 9248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->cwnd) / 9258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((uint64_t)srtt * t_ucwnd_sbw)); 9268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* INCREASE FACTOR */ 9278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = (uint32_t)(((uint64_t)net->net_ack * 928b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen (uint64_t)net->cwnd) / 929b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ((uint64_t)srtt * t_ucwnd_sbw)); 9308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* INCREASE FACTOR */ 9318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr > limit) { 9328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = limit; 9338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr == 0) { 9358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = 1; 9368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 9388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen case SCTP_CMT_MPTCP: 9398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen limit = (uint32_t)(((uint64_t)net->mtu * 9408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen mptcp_like_alpha * 9418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)SCTP_BASE_SYSCTL(sctp_L2_abc_variable)) >> 9428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SHIFT_MPTCP_MULTI); 9438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = (uint32_t)(((uint64_t)net->net_ack * 9448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen mptcp_like_alpha) >> 9458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SHIFT_MPTCP_MULTI); 9468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr > limit) { 9478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = limit; 9488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr > net->net_ack) { 9508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = net->net_ack; 9518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr > net->mtu) { 9538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = net->mtu; 9548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 9568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen default: 9578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = net->net_ack; 9588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr > net->mtu * SCTP_BASE_SYSCTL(sctp_L2_abc_variable)) { 9598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = net->mtu * SCTP_BASE_SYSCTL(sctp_L2_abc_variable); 9608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 9628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += incr; 9648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 9658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, incr, 9668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_SS); 9678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 968f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 9698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, ack, 9708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->asoc.my_vtag, 971b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), 9728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net, 9738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 974b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 9758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 9768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 9778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, 9788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NOADV_SS); 9798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 9818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 9828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We are in congestion avoidance */ 9838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 9848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Add to pba 9858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 9868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked += net->net_ack; 9878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 9888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->flight_size + net->net_ack >= net->cwnd) && 9898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (net->partial_bytes_acked >= net->cwnd)) { 9908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked -= net->cwnd; 991f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 9928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd = net->cwnd; 993b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 9948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen switch (asoc->sctp_cmt_on_off) { 9958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen case SCTP_CMT_RPV1: 9968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = (uint32_t)(((uint64_t)net->mtu * 9978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->ssthresh) / 9988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)t_ssthresh); 9998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr == 0) { 10008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = 1; 10018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 10038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen case SCTP_CMT_RPV2: 10048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* lastsa>>3; we don't need to divide ... */ 10058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = net->lastsa; 10068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (srtt == 0) { 10078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = 1; 10088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = (uint32_t)((uint64_t)net->mtu * 10108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->cwnd / 10118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((uint64_t)srtt * 10128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw)); 10138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* INCREASE FACTOR */ 10148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr == 0) { 10158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = 1; 10168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 10188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen case SCTP_CMT_MPTCP: 10198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = (uint32_t)((mptcp_like_alpha * 10208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t) net->cwnd) >> 10218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SHIFT_MPTCP_MULTI); 10228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (incr > net->mtu) { 10238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = net->mtu; 10248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 10268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen default: 10278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = net->mtu; 10288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 10298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += incr; 1031f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 10328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, ack, 10338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->asoc.my_vtag, 1034b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), 10358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net, 10368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 1037b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 10388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 10398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, 10408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_CA); 10418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 10438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, 10458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NOADV_CA); 10468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 10508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, 10528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NO_CUMACK); 10538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 10568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 10578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1058f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 10598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 10608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_exit_pf_common(struct sctp_tcb *stcb, struct sctp_nets *net) 10610ac02f34d6041cd0018437596a5a9a94685e6919tuexen#else 10620ac02f34d6041cd0018437596a5a9a94685e6919tuexenstatic void 10630ac02f34d6041cd0018437596a5a9a94685e6919tuexensctp_cwnd_update_exit_pf_common(struct sctp_tcb *stcb SCTP_UNUSED, struct sctp_nets *net) 10640ac02f34d6041cd0018437596a5a9a94685e6919tuexen#endif 10658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1066f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 10678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd; 10688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 10698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd = net->cwnd; 1070b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 10718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->mtu; 1072f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 1073000a5bac556b28e74e4e98c540f66b1743e9312dtuexen SDT_PROBE(sctp, cwnd, net, ack, 1074000a5bac556b28e74e4e98c540f66b1743e9312dtuexen stcb->asoc.my_vtag, ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), net, 10758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 1076b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 10778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTPDBG(SCTP_DEBUG_INDATA1, "Destination %p moved from PF to reachable with cwnd %d.\n", 1078ef2346ee09e2a6d7e580c0d41191f82e3b1f4937t (void *)net, net->cwnd); 10798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 10808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 10818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 10828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 10838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_timeout(struct sctp_tcb *stcb, struct sctp_nets *net) 10848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 10858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 10868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t t_ssthresh, t_cwnd; 10878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t t_ucwnd_sbw; 10888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 10898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* MT FIXME: Don't compute this over and over again */ 10908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ssthresh = 0; 10918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_cwnd = 0; 10928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((stcb->asoc.sctp_cmt_on_off == SCTP_CMT_RPV1) || 10938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->asoc.sctp_cmt_on_off == SCTP_CMT_RPV2)) { 10948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *lnet; 10958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t srtt; 10968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 10978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw = 0; 10988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 10998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ssthresh += lnet->ssthresh; 11008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_cwnd += lnet->cwnd; 11018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = lnet->lastsa; 11028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* lastsa>>3; we don't need to divide ... */ 11038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (srtt > 0) { 11048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw += (uint64_t)lnet->cwnd / (uint64_t)srtt; 11058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1107b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen if (t_ssthresh < 1) { 1108b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen t_ssthresh = 1; 1109b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen } 11108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (t_ucwnd_sbw < 1) { 11118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen t_ucwnd_sbw = 1; 11128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (stcb->asoc.sctp_cmt_on_off == SCTP_CMT_RPV1) { 11148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = (uint32_t)(((uint64_t)4 * 11158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->mtu * 11168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)net->ssthresh) / 11178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (uint64_t)t_ssthresh); 11188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 11198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t cc_delta; 11208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 11218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = net->lastsa; 11228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* lastsa>>3; we don't need to divide ... */ 11238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (srtt == 0) { 11248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen srtt = 1; 11258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cc_delta = t_ucwnd_sbw * (uint64_t)srtt / 2; 11278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cc_delta < t_cwnd) { 11288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = (uint32_t)((uint64_t)t_cwnd - cc_delta); 11298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 11308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->mtu; 11318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->cwnd > t_cwnd / 2) && 11348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (net->ssthresh < net->cwnd - t_cwnd / 2)) { 11358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd - t_cwnd / 2; 11368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ssthresh < net->mtu) { 11388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->mtu; 11398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 11418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = max(net->cwnd / 2, 4 * net->mtu); 11428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->mtu; 11448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 1145f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 11468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, to, 11478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->asoc.my_vtag, 1148b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), 11498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net, 11508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 1151b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 11528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 11538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->cwnd - old_cwnd, SCTP_CWND_LOG_FROM_RTX); 11548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 11568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 11578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 11588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_ecn_echo_common(struct sctp_tcb *stcb, struct sctp_nets *net, 1159b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen int in_window, int num_pkt_lost, int use_rtcc) 11608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 11618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 11628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((use_rtcc) && (net->lan_type == SCTP_LAN_LOCAL) && (net->cc_mod.rtcc.use_dccc_ecn)) { 11638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Data center Congestion Control */ 11648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (in_window == 0) { 11658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Go to CA with the cwnd at the point we sent 11668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * the TSN that was marked with a CE. 11678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 11688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ecn_prev_cwnd < net->cwnd) { 11698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Restore to prev cwnd */ 11708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->ecn_prev_cwnd - (net->mtu * num_pkt_lost); 11718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 11728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Just cut in 1/2 */ 11738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd /= 2; 11748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Drop to CA */ 11768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd - (num_pkt_lost * net->mtu); 11778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 11788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 11798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 11818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Further tuning down required over the drastic orginal cut */ 11828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh -= (net->mtu * num_pkt_lost); 11838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd -= (net->mtu * num_pkt_lost); 11848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 11858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 11868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 11888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_STAT_INCR(sctps_ecnereducedcwnd); 11908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 11918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (in_window == 0) { 11928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_STAT_INCR(sctps_ecnereducedcwnd); 11938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd / 2; 11948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ssthresh < net->mtu) { 11958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->mtu; 11968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* here back off the timer as well, to slow us down */ 11978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->RTO <<= 1; 11988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 11998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->ssthresh; 1200f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 12018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, ecn, 12028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->asoc.my_vtag, 1203b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), 12048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net, 12058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 1206b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 12078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 12088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 12098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 12108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 12118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 12128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 12138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 12148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 12158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 12168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_packet_dropped(struct sctp_tcb *stcb, 12178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 12188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t *bottle_bw, uint32_t *on_queue) 12198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 12208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t bw_avail; 12218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int rtt; 12228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen unsigned int incr; 12238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 12248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 12258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* need real RTT in msd for this calc */ 12260ac02f34d6041cd0018437596a5a9a94685e6919tuexen rtt = net->rtt / 1000; 12278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* get bottle neck bw */ 12288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen *bottle_bw = ntohl(cp->bottle_bw); 12298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* and whats on queue */ 12308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen *on_queue = ntohl(cp->current_onq); 12318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 12328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * adjust the on-queue if our flight is more it could be 12338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * that the router has not yet gotten data "in-flight" to it 12348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 12358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (*on_queue < net->flight_size) 12368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen *on_queue = net->flight_size; 12378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* calculate the available space */ 12388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen bw_avail = (*bottle_bw * rtt) / 1000; 12398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (bw_avail > *bottle_bw) { 12408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 12418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Cap the growth to no more than the bottle neck. 12428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * This can happen as RTT slides up due to queues. 12438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * It also means if you have more than a 1 second 12448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * RTT with a empty queue you will be limited to the 12458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * bottle_bw per second no matter if other points 12468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * have 1/2 the RTT and you could get more out... 12478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 12488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen bw_avail = *bottle_bw; 12498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 12508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (*on_queue > bw_avail) { 12518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 12528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * No room for anything else don't allow anything 12538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * else to be "added to the fire". 12548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 12558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int seg_inflight, seg_onqueue, my_portion; 12568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 12578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 12588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* how much are we over queue size? */ 12598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = *on_queue - bw_avail; 12608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (stcb->asoc.seen_a_sack_this_pkt) { 12618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 12628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * undo any cwnd adjustment that the sack 12638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * might have made 12648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 12658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->prev_cwnd; 12668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 12678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Now how much of that is mine? */ 12688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen seg_inflight = net->flight_size / net->mtu; 12698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen seg_onqueue = *on_queue / net->mtu; 12708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen my_portion = (incr * seg_inflight) / seg_onqueue; 12718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 12728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Have I made an adjustment already */ 12738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd > net->flight_size) { 12748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 12758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * for this flight I made an adjustment we 12768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * need to decrease the portion by a share 12778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * our previous adjustment. 12788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 12798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int diff_adj; 12808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 12818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen diff_adj = net->cwnd - net->flight_size; 12828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (diff_adj > my_portion) 12838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen my_portion = 0; 12848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else 12858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen my_portion -= diff_adj; 12868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 12878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 12888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * back down to the previous cwnd (assume we have 12898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * had a sack before this packet). minus what ever 12908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * portion of the overage is my fault. 12918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 12928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd -= my_portion; 12938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 12948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* we will NOT back down more than 1 MTU */ 12958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd <= net->mtu) { 12968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->mtu; 12978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 12988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* force into CA */ 12998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd - 1; 13008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 13018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 13028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Take 1/4 of the space left or max burst up .. 13038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * whichever is less. 13048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 13058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = (bw_avail - *on_queue) >> 2; 13068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((stcb->asoc.max_burst > 0) && 13078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->asoc.max_burst * net->mtu < incr)) { 13088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = stcb->asoc.max_burst * net->mtu; 13098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += incr; 13118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd > bw_avail) { 13138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We can't exceed the pipe size */ 13148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = bw_avail; 13158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd < net->mtu) { 13178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We always have 1 MTU */ 13188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->mtu; 13198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 13218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd - old_cwnd != 0) { 13228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* log only changes */ 1323f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 1324000a5bac556b28e74e4e98c540f66b1743e9312dtuexen SDT_PROBE(sctp, cwnd, net, pd, 1325000a5bac556b28e74e4e98c540f66b1743e9312dtuexen stcb->asoc.my_vtag, 1326000a5bac556b28e74e4e98c540f66b1743e9312dtuexen ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), 1327000a5bac556b28e74e4e98c540f66b1743e9312dtuexen net, 13288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 1329b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 13308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 13318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), 13328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_SAT); 13338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 13368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 13378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 13388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_output(struct sctp_tcb *stcb, 13398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net, int burst_limit) 13408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 13418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 13428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 13438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ssthresh < net->cwnd) 13448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd; 13458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (burst_limit) { 13468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = (net->flight_size + (burst_limit * net->mtu)); 1347f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 1348000a5bac556b28e74e4e98c540f66b1743e9312dtuexen SDT_PROBE(sctp, cwnd, net, bl, 1349000a5bac556b28e74e4e98c540f66b1743e9312dtuexen stcb->asoc.my_vtag, 1350000a5bac556b28e74e4e98c540f66b1743e9312dtuexen ((stcb->sctp_ep->sctp_lport << 16) | (stcb->rport)), 1351000a5bac556b28e74e4e98c540f66b1743e9312dtuexen net, 13528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd, net->cwnd); 1353b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 13548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 13558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_BRST); 13568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 13588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 13598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 13608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 13618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_sack(struct sctp_tcb *stcb, 13628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc, 13630ac02f34d6041cd0018437596a5a9a94685e6919tuexen int accum_moved, int reneged_all, int will_exit) 13648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 13658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Passing a zero argument in last disables the rtcc algoritm */ 13660ac02f34d6041cd0018437596a5a9a94685e6919tuexen sctp_cwnd_update_after_sack_common(stcb, asoc, accum_moved, reneged_all, will_exit, 0); 13678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 13688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 13698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 13708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_after_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 13718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int in_window, int num_pkt_lost) 13728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 13738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Passing a zero argument in last disables the rtcc algoritm */ 13748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_ecn_echo_common(stcb, net, in_window, num_pkt_lost, 0); 13758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 13768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 13778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/* Here starts the RTCCVAR type CC invented by RRS which 13788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * is a slight mod to RFC2581. We reuse a common routine or 13798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * two since these algoritms are so close and need to 13808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * remain the same. 13818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 13828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 13838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_rtcc_after_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 13848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int in_window, int num_pkt_lost) 13858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 13868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_ecn_echo_common(stcb, net, in_window, num_pkt_lost, 1); 13878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 13888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 13898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1390000a5bac556b28e74e4e98c540f66b1743e9312dtuexenstatic 1391000a5bac556b28e74e4e98c540f66b1743e9312dtuexenvoid sctp_cwnd_update_rtcc_tsn_acknowledged(struct sctp_nets *net, 13928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_tmit_chunk *tp1) 13938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 13948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_bytes += tp1->send_size; 13958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 13968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1397000a5bac556b28e74e4e98c540f66b1743e9312dtuexenstatic void 1398000a5bac556b28e74e4e98c540f66b1743e9312dtuexensctp_cwnd_prepare_rtcc_net_for_sack(struct sctp_tcb *stcb SCTP_UNUSED, 13998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net) 14008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 14018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.tls_needs_set > 0) { 14028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We had a bw measurment going on */ 14038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct timeval ltls; 14048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_GETPTIME_TIMEVAL(<ls); 14058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen timevalsub(<ls, &net->cc_mod.rtcc.tls); 14068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.new_tot_time = (ltls.tv_sec * 1000000) + ltls.tv_usec; 14078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 14088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 14098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 14108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 1411000a5bac556b28e74e4e98c540f66b1743e9312dtuexensctp_cwnd_new_rtcc_transmission_begins(struct sctp_tcb *stcb, 14128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net) 14138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1414f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 14158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t vtag, probepoint; 1416b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen 1417b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 14188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.lbw) { 1419f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 14208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Clear the old bw.. we went to 0 in-flight */ 1421000a5bac556b28e74e4e98c540f66b1743e9312dtuexen vtag = (net->rtt << 32) | (((uint32_t)(stcb->sctp_ep->sctp_lport)) << 16) | 14228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->rport); 14238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint = (((uint64_t)net->cwnd) << 32); 14248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Probe point 8 */ 14258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((8 << 16) | 0); 14268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 14278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 14288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw << 32) | 0), 14298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((net->cc_mod.rtcc.lbw_rtt << 32) | net->rtt), 14308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->flight_size, 14318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 1432b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 14338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw_rtt = 0; 14348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.cwnd_at_bw_set = 0; 14358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw = 0; 14368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_bytes_at_last_rttc = 0; 14378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce = 0; 14388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_tot_time = 0; 14398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_bytes = 0; 14408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.tls_needs_set = 0; 14418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.steady_step) { 14428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce = 0; 14438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 14448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 0; 14458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 14468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.ret_from_eq) { 14478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* less aggressive one - reset cwnd too */ 14488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t cwnd_in_mtu, cwnd; 14498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 14508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cwnd_in_mtu = SCTP_BASE_SYSCTL(sctp_initial_cwnd); 14518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cwnd_in_mtu == 0) { 14528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Using 0 means that the value of RFC 4960 is used. */ 14538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); 14548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 14558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 14568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * We take the minimum of the burst limit and the 14578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * initial congestion window. 14588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 14598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((stcb->asoc.max_burst > 0) && (cwnd_in_mtu > stcb->asoc.max_burst)) 14608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cwnd_in_mtu = stcb->asoc.max_burst; 14618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cwnd = (net->mtu - sizeof(struct sctphdr)) * cwnd_in_mtu; 14628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 14638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd > cwnd) { 14648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Only set if we are not a timeout (i.e. down to 1 mtu) */ 14658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = cwnd; 14668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 14678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 14688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 14698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 14708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1471000a5bac556b28e74e4e98c540f66b1743e9312dtuexenstatic void 1472000a5bac556b28e74e4e98c540f66b1743e9312dtuexensctp_set_rtcc_initial_cc_param(struct sctp_tcb *stcb, 14738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net) 14748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1475f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 14768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint64_t vtag, probepoint; 1477b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen 1478b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 14798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_set_initial_cc_param(stcb, net); 14808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->asoc.use_precise_time = 1; 1481f7068d8ea8f314aa54a3aaec7d3603a9b9b55e0ctuexen#if defined(__FreeBSD__) && __FreeBSD_version >= 803000 14828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint = (((uint64_t)net->cwnd) << 32); 14838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint |= ((9 << 16) | 0); 1484000a5bac556b28e74e4e98c540f66b1743e9312dtuexen vtag = (net->rtt << 32) | 1485000a5bac556b28e74e4e98c540f66b1743e9312dtuexen (((uint32_t)(stcb->sctp_ep->sctp_lport)) << 16) | 14868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (stcb->rport); 14878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SDT_PROBE(sctp, cwnd, net, rttvar, 14888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen vtag, 14898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 0, 14908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 0, 14918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 0, 14928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen probepoint); 1493b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen#endif 14948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw_rtt = 0; 14958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.cwnd_at_bw_set = 0; 14968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce = 0; 14978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.lbw = 0; 14988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.vol_reduce = 0; 14998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_bytes_at_last_rttc = 0; 15008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_tot_time = 0; 15018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.bw_bytes = 0; 15028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.tls_needs_set = 0; 15038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.ret_from_eq = SCTP_BASE_SYSCTL(sctp_rttvar_eqret); 15048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.steady_step = SCTP_BASE_SYSCTL(sctp_steady_step); 15058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.use_dccc_ecn = SCTP_BASE_SYSCTL(sctp_use_dccc_ecn); 15068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.step_cnt = 0; 15078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.last_step_state = 0; 15088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 15118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic int 1513000a5bac556b28e74e4e98c540f66b1743e9312dtuexensctp_cwnd_rtcc_socket_option(struct sctp_tcb *stcb, int setorget, 15148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_cc_option *cc_opt) 15158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 15168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net; 15178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (setorget == 1) { 15188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* a set */ 15198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cc_opt->option == SCTP_CC_OPT_RTCC_SETMODE) { 15208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((cc_opt->aid_value.assoc_value != 0) && 15218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (cc_opt->aid_value.assoc_value != 1)) { 15228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (EINVAL); 15238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 15258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.ret_from_eq = cc_opt->aid_value.assoc_value; 15268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (cc_opt->option == SCTP_CC_OPT_USE_DCCC_ECN) { 15288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((cc_opt->aid_value.assoc_value != 0) && 15298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (cc_opt->aid_value.assoc_value != 1)) { 15308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (EINVAL); 15318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 15338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.use_dccc_ecn = cc_opt->aid_value.assoc_value; 15348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (cc_opt->option == SCTP_CC_OPT_STEADY_STEP) { 15368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 15378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.steady_step = cc_opt->aid_value.assoc_value; 15388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 15408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (EINVAL); 15418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 15438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* a get */ 15448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cc_opt->option == SCTP_CC_OPT_RTCC_SETMODE) { 15458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net = TAILQ_FIRST(&stcb->asoc.nets); 15468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net == NULL) { 15478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (EFAULT); 15488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cc_opt->aid_value.assoc_value = net->cc_mod.rtcc.ret_from_eq; 15508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (cc_opt->option == SCTP_CC_OPT_USE_DCCC_ECN) { 15518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net = TAILQ_FIRST(&stcb->asoc.nets); 15528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net == NULL) { 15538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (EFAULT); 15548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cc_opt->aid_value.assoc_value = net->cc_mod.rtcc.use_dccc_ecn; 15568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (cc_opt->option == SCTP_CC_OPT_STEADY_STEP) { 15578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net = TAILQ_FIRST(&stcb->asoc.nets); 15588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net == NULL) { 15598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (EFAULT); 15608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cc_opt->aid_value.assoc_value = net->cc_mod.rtcc.steady_step; 15628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 15638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (EINVAL); 15648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return (0); 15678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 15688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 1570000a5bac556b28e74e4e98c540f66b1743e9312dtuexensctp_cwnd_update_rtcc_packet_transmitted(struct sctp_tcb *stcb SCTP_UNUSED, 15710ac02f34d6041cd0018437596a5a9a94685e6919tuexen struct sctp_nets *net) 15728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 15738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.rtcc.tls_needs_set == 0) { 15748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_GETPTIME_TIMEVAL(&net->cc_mod.rtcc.tls); 15758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.tls_needs_set = 2; 15768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 15778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 15788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 15808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_cwnd_update_rtcc_after_sack(struct sctp_tcb *stcb, 15818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc, 15820ac02f34d6041cd0018437596a5a9a94685e6919tuexen int accum_moved, int reneged_all, int will_exit) 15838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 15848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Passing a one argument at the last enables the rtcc algoritm */ 15850ac02f34d6041cd0018437596a5a9a94685e6919tuexen sctp_cwnd_update_after_sack_common(stcb, asoc, accum_moved, reneged_all, will_exit, 1); 15868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 15878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 15890ac02f34d6041cd0018437596a5a9a94685e6919tuexensctp_rtt_rtcc_calculated(struct sctp_tcb *stcb SCTP_UNUSED, 15900ac02f34d6041cd0018437596a5a9a94685e6919tuexen struct sctp_nets *net, 15910ac02f34d6041cd0018437596a5a9a94685e6919tuexen struct timeval *now SCTP_UNUSED) 15928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 15938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.rtcc.rtt_set_this_sack = 1; 15948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 15958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/* Here starts Sally Floyds HS-TCP */ 15978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 15988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstruct sctp_hs_raise_drop { 15998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int32_t cwnd; 16008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int32_t increase; 16018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int32_t drop_percent; 16028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen}; 16038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 16048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#define SCTP_HS_TABLE_SIZE 73 16058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 16068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstruct sctp_hs_raise_drop sctp_cwnd_adjust[SCTP_HS_TABLE_SIZE] = { 16078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {38, 1, 50}, /* 0 */ 16088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {118, 2, 44}, /* 1 */ 16098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {221, 3, 41}, /* 2 */ 16108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {347, 4, 38}, /* 3 */ 16118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {495, 5, 37}, /* 4 */ 16128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {663, 6, 35}, /* 5 */ 16138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {851, 7, 34}, /* 6 */ 16148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {1058, 8, 33}, /* 7 */ 16158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {1284, 9, 32}, /* 8 */ 16168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {1529, 10, 31}, /* 9 */ 16178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {1793, 11, 30}, /* 10 */ 16188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {2076, 12, 29}, /* 11 */ 16198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {2378, 13, 28}, /* 12 */ 16208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {2699, 14, 28}, /* 13 */ 16218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {3039, 15, 27}, /* 14 */ 16228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {3399, 16, 27}, /* 15 */ 16238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {3778, 17, 26}, /* 16 */ 16248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {4177, 18, 26}, /* 17 */ 16258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {4596, 19, 25}, /* 18 */ 16268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {5036, 20, 25}, /* 19 */ 16278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {5497, 21, 24}, /* 20 */ 16288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {5979, 22, 24}, /* 21 */ 16298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {6483, 23, 23}, /* 22 */ 16308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {7009, 24, 23}, /* 23 */ 16318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {7558, 25, 22}, /* 24 */ 16328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {8130, 26, 22}, /* 25 */ 16338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {8726, 27, 22}, /* 26 */ 16348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {9346, 28, 21}, /* 27 */ 16358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {9991, 29, 21}, /* 28 */ 16368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {10661, 30, 21}, /* 29 */ 16378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {11358, 31, 20}, /* 30 */ 16388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {12082, 32, 20}, /* 31 */ 16398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {12834, 33, 20}, /* 32 */ 16408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {13614, 34, 19}, /* 33 */ 16418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {14424, 35, 19}, /* 34 */ 16428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {15265, 36, 19}, /* 35 */ 16438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {16137, 37, 19}, /* 36 */ 16448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {17042, 38, 18}, /* 37 */ 16458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {17981, 39, 18}, /* 38 */ 16468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {18955, 40, 18}, /* 39 */ 16478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {19965, 41, 17}, /* 40 */ 16488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {21013, 42, 17}, /* 41 */ 16498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {22101, 43, 17}, /* 42 */ 16508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {23230, 44, 17}, /* 43 */ 16518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {24402, 45, 16}, /* 44 */ 16528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {25618, 46, 16}, /* 45 */ 16538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {26881, 47, 16}, /* 46 */ 16548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {28193, 48, 16}, /* 47 */ 16558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {29557, 49, 15}, /* 48 */ 16568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {30975, 50, 15}, /* 49 */ 16578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {32450, 51, 15}, /* 50 */ 16588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {33986, 52, 15}, /* 51 */ 16598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {35586, 53, 14}, /* 52 */ 16608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {37253, 54, 14}, /* 53 */ 16618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {38992, 55, 14}, /* 54 */ 16628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {40808, 56, 14}, /* 55 */ 16638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {42707, 57, 13}, /* 56 */ 16648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {44694, 58, 13}, /* 57 */ 16658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {46776, 59, 13}, /* 58 */ 16668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {48961, 60, 13}, /* 59 */ 16678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {51258, 61, 13}, /* 60 */ 16688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {53677, 62, 12}, /* 61 */ 16698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {56230, 63, 12}, /* 62 */ 16708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {58932, 64, 12}, /* 63 */ 16718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {61799, 65, 12}, /* 64 */ 16728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {64851, 66, 11}, /* 65 */ 16738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {68113, 67, 11}, /* 66 */ 16748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {71617, 68, 11}, /* 67 */ 16758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {75401, 69, 10}, /* 68 */ 16768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {79517, 70, 10}, /* 69 */ 16778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {84035, 71, 10}, /* 70 */ 16788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {89053, 72, 10}, /* 71 */ 16798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen {94717, 73, 9} /* 72 */ 16808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen}; 16818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 16828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 16838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_hs_cwnd_increase(struct sctp_tcb *stcb, struct sctp_nets *net) 16848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 16858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int cur_val, i, indx, incr; 16868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 16878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cur_val = net->cwnd >> 10; 16888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen indx = SCTP_HS_TABLE_SIZE - 1; 168947a306d634abf33223ef347472c4b1cd441d139ftuexen 16908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cur_val < sctp_cwnd_adjust[0].cwnd) { 16918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* normal mode */ 16928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack > net->mtu) { 16938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->mtu; 16948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 16958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, SCTP_CWND_LOG_FROM_SS); 16968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 16978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 16988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->net_ack; 16998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 17008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, SCTP_CWND_LOG_FROM_SS); 17018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 17048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = net->last_hs_used; i < SCTP_HS_TABLE_SIZE; i++) { 17058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cur_val < sctp_cwnd_adjust[i].cwnd) { 17068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen indx = i; 17078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 17088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->last_hs_used = indx; 17118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen incr = ((sctp_cwnd_adjust[indx].increase) << 10); 17128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += incr; 17138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 17148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, incr, SCTP_CWND_LOG_FROM_SS); 17158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 17188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 17198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 17208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_hs_cwnd_decrease(struct sctp_tcb *stcb, struct sctp_nets *net) 17218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 17228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int cur_val, i, indx; 17238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 17248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 17258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cur_val = net->cwnd >> 10; 17268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cur_val < sctp_cwnd_adjust[0].cwnd) { 17278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* normal mode */ 17288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd / 2; 17298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ssthresh < (net->mtu * 2)) { 17308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = 2 * net->mtu; 17318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->ssthresh; 17338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 17348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* drop by the proper amount */ 17358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->cwnd - (int)((net->cwnd / 100) * 17368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_adjust[net->last_hs_used].drop_percent); 17378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->ssthresh; 17388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* now where are we */ 17398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen indx = net->last_hs_used; 17408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen cur_val = net->cwnd >> 10; 17418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* reset where we are in the table */ 17428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cur_val < sctp_cwnd_adjust[0].cwnd) { 17438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* feel out of hs */ 17448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->last_hs_used = 0; 17458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 17468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = indx; i >= 1; i--) { 17478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (cur_val > sctp_cwnd_adjust[i - 1].cwnd) { 17488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 17498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->last_hs_used = indx; 17528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 17558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_FR); 17568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 17588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 17598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 17608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_hs_cwnd_update_after_fr(struct sctp_tcb *stcb, 17618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc) 17628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 17638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net; 17648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 17658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery code. Need to debug. ((sctp_cmt_on_off > 0) && 17668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * (net->fast_retran_loss_recovery == 0))) 17678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 17688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 17698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((asoc->fast_retran_loss_recovery == 0) || 17708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off > 0)) { 17718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* out of a RFC2582 Fast recovery window? */ 17728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack > 0) { 17738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 17748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * per section 7.2.3, are there any 17758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * destinations that had a fast retransmit 17768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * to them. If so what we need to do is 17778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * adjust ssthresh and cwnd. 17788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 17798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_tmit_chunk *lchk; 17808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 17818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_hs_cwnd_decrease(stcb, net); 17828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 17838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen lchk = TAILQ_FIRST(&asoc->send_queue); 17848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 17858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 17868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Turn on fast recovery window */ 17878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_retran_loss_recovery = 1; 17888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (lchk == NULL) { 17898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Mark end of the window */ 17908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_recovery_tsn = asoc->sending_seq - 1; 17918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 17928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_recovery_tsn = lchk->rec.data.TSN_seq - 1; 17938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 17948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 17958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 17968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery -- per destination 17978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * recovery variable. 17988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 17998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_retran_loss_recovery = 1; 18008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 18018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (lchk == NULL) { 18028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Mark end of the window */ 18038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_recovery_tsn = asoc->sending_seq - 1; 18048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 18058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_recovery_tsn = lchk->rec.data.TSN_seq - 1; 18068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 18088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_timer_stop(SCTP_TIMER_TYPE_SEND, 1809b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INDATA+SCTP_LOC_32); 18108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_timer_start(SCTP_TIMER_TYPE_SEND, 18118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->sctp_ep, stcb, net); 18128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (net->net_ack > 0) { 18148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 18158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Mark a peg that we WOULD have done a cwnd 18168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * reduction but RFC2582 prevented this action. 18178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 18188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_STAT_INCR(sctps_fastretransinrtt); 18198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 18228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 18238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 18248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_hs_cwnd_update_after_sack(struct sctp_tcb *stcb, 18258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc, 18260ac02f34d6041cd0018437596a5a9a94685e6919tuexen int accum_moved, int reneged_all SCTP_UNUSED, int will_exit) 18278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 18288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net; 18298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /******************************/ 18308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* update cwnd and Early FR */ 18318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /******************************/ 18328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 18338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 18348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef JANA_CMT_FAST_RECOVERY 18358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 18368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery code. Need to debug. 18378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 18388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->fast_retran_loss_recovery && net->new_pseudo_cumack) { 18398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_TSN_GE(asoc->last_acked_seq, net->fast_recovery_tsn) || 18408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_TSN_GE(net->pseudo_cumack,net->fast_recovery_tsn)) { 18418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->will_exit_fast_recovery = 1; 18428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 18458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* if nothing was acked on this destination skip it */ 18468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack == 0) { 18478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 18488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, 0, SCTP_CWND_LOG_FROM_SACK); 18498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen continue; 18518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef JANA_CMT_FAST_RECOVERY 18538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* CMT fast recovery code 18548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 18558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 18568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (sctp_cmt_on_off > 0 && net->fast_retran_loss_recovery && net->will_exit_fast_recovery == 0) { 18578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen @@@ Do something 18588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else if (sctp_cmt_on_off == 0 && asoc->fast_retran_loss_recovery && will_exit == 0) { 18608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 18618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 18628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 18638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (asoc->fast_retran_loss_recovery && 18648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (will_exit == 0) && 18658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off == 0)) { 18668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 18678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * If we are in loss recovery we skip any cwnd 18688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * update 18698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 18708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return; 18718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 18738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT: CUC algorithm. Update cwnd if pseudo-cumack has 18748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * moved. 18758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 18768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (accum_moved || 18778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((asoc->sctp_cmt_on_off > 0) && net->new_pseudo_cumack)) { 18788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* If the cumulative ack moved we can proceed */ 18798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd <= net->ssthresh) { 18808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We are in slow start */ 18818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->flight_size + net->net_ack >= net->cwnd) { 18828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 18838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_hs_cwnd_increase(stcb, net); 18848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 18858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 18868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 18878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, 18888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NOADV_SS); 18898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 18918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 18928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We are in congestion avoidance */ 18938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked += net->net_ack; 18948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((net->flight_size + net->net_ack >= net->cwnd) && 18958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (net->partial_bytes_acked >= net->cwnd)) { 18968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked -= net->cwnd; 18978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->mtu; 18988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 18998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, 19008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_CA); 19018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 19038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 19048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, 19058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NOADV_CA); 19068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 19108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 19118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, 19128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NO_CUMACK); 19138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 19178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/* 19208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * H-TCP congestion control. The algorithm is detailed in: 19218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * R.N.Shorten, D.J.Leith: 19228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * "H-TCP: TCP for high-speed and long-distance networks" 19238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Proc. PFLDnet, Argonne, 2004. 19248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * http://www.hamilton.ie/net/htcp3.pdf 19258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 19268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic int use_rtt_scaling = 1; 19298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic int use_bandwidth_switch = 1; 19308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic inline int 19328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenbetween(uint32_t seq1, uint32_t seq2, uint32_t seq3) 19338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1934b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (seq3 - seq2 >= seq1 - seq2); 19358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 19368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic inline uint32_t 19388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_cong_time(struct htcp *ca) 19398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1940b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (sctp_get_tick_count() - ca->last_cong); 19418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 19428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic inline uint32_t 19448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_ccount(struct htcp *ca) 19458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1946b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (htcp_cong_time(ca)/ca->minRTT); 19478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 19488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic inline void 19508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_reset(struct htcp *ca) 19518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 19528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->undo_last_cong = ca->last_cong; 19538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->undo_maxRTT = ca->maxRTT; 19548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->undo_old_maxB = ca->old_maxB; 19558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->last_cong = sctp_get_tick_count(); 19568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 19578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef SCTP_NOT_USED 19598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic uint32_t 19618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_cwnd_undo(struct sctp_tcb *stcb, struct sctp_nets *net) 19628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 19638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.last_cong = net->cc_mod.htcp_ca.undo_last_cong; 19648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.maxRTT = net->cc_mod.htcp_ca.undo_maxRTT; 19658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.old_maxB = net->cc_mod.htcp_ca.undo_old_maxB; 1966b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (max(net->cwnd, ((net->ssthresh/net->mtu<<7)/net->cc_mod.htcp_ca.beta)*net->mtu)); 19678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 19688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 19708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic inline void 19720ac02f34d6041cd0018437596a5a9a94685e6919tuexenmeasure_rtt(struct sctp_nets *net) 19738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 19748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t srtt = net->lastsa>>SCTP_RTT_SHIFT; 19758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* keep track of minimum RTT seen so far, minRTT is zero at first */ 19778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.htcp_ca.minRTT > srtt || !net->cc_mod.htcp_ca.minRTT) 19788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.minRTT = srtt; 19798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* max RTT */ 19818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->fast_retran_ip == 0 && net->ssthresh < 0xFFFF && htcp_ccount(&net->cc_mod.htcp_ca) > 3) { 19828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.htcp_ca.maxRTT < net->cc_mod.htcp_ca.minRTT) 19838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.maxRTT = net->cc_mod.htcp_ca.minRTT; 19848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.htcp_ca.maxRTT < srtt && srtt <= net->cc_mod.htcp_ca.maxRTT+MSEC_TO_TICKS(20)) 19858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.maxRTT = srtt; 19868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 19878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 19888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 19900ac02f34d6041cd0018437596a5a9a94685e6919tuexenmeasure_achieved_throughput(struct sctp_nets *net) 19918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 19928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t now = sctp_get_tick_count(); 19938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->fast_retran_ip == 0) 19958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.bytes_acked = net->net_ack; 19968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 19978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (!use_bandwidth_switch) 19988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return; 19998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* achieved throughput calculations */ 20018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* JRS - not 100% sure of this statement */ 20028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->fast_retran_ip == 1) { 20038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.bytecount = 0; 20048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.lasttime = now; 20058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return; 20068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.bytecount += net->net_ack; 2009a7e2a63200c3155382d862ceb5cf07a1176ee531t if ((net->cc_mod.htcp_ca.bytecount >= net->cwnd - (((net->cc_mod.htcp_ca.alpha >> 7) ? (net->cc_mod.htcp_ca.alpha >> 7) : 1) * net->mtu)) && 2010a7e2a63200c3155382d862ceb5cf07a1176ee531t (now - net->cc_mod.htcp_ca.lasttime >= net->cc_mod.htcp_ca.minRTT) && 2011a7e2a63200c3155382d862ceb5cf07a1176ee531t (net->cc_mod.htcp_ca.minRTT > 0)) { 20128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t cur_Bi = net->cc_mod.htcp_ca.bytecount/net->mtu*hz/(now - net->cc_mod.htcp_ca.lasttime); 2013a7e2a63200c3155382d862ceb5cf07a1176ee531t 20148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (htcp_ccount(&net->cc_mod.htcp_ca) <= 3) { 20158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* just after backoff */ 20168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.minB = net->cc_mod.htcp_ca.maxB = net->cc_mod.htcp_ca.Bi = cur_Bi; 20178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 20188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.Bi = (3*net->cc_mod.htcp_ca.Bi + cur_Bi)/4; 20198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.htcp_ca.Bi > net->cc_mod.htcp_ca.maxB) 20208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.maxB = net->cc_mod.htcp_ca.Bi; 20218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cc_mod.htcp_ca.minB > net->cc_mod.htcp_ca.maxB) 20228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.minB = net->cc_mod.htcp_ca.maxB; 20238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.bytecount = 0; 20258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.lasttime = now; 20268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 20288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic inline void 20308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_beta_update(struct htcp *ca, uint32_t minRTT, uint32_t maxRTT) 20318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 20328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (use_bandwidth_switch) { 20338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t maxB = ca->maxB; 20348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t old_maxB = ca->old_maxB; 20358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->old_maxB = ca->maxB; 20368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (!between(5*maxB, 4*old_maxB, 6*old_maxB)) { 20388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->beta = BETA_MIN; 20398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->modeswitch = 0; 20408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return; 20418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (ca->modeswitch && minRTT > (uint32_t)MSEC_TO_TICKS(10) && maxRTT) { 20458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->beta = (minRTT<<7)/maxRTT; 20468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (ca->beta < BETA_MIN) 20478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->beta = BETA_MIN; 20488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else if (ca->beta > BETA_MAX) 20498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->beta = BETA_MAX; 20508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 20518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->beta = BETA_MIN; 20528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->modeswitch = 1; 20538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 20558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic inline void 20578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_alpha_update(struct htcp *ca) 20588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 20598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t minRTT = ca->minRTT; 20608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t factor = 1; 20618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t diff = htcp_cong_time(ca); 20628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (diff > (uint32_t)hz) { 20648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen diff -= hz; 2065b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen factor = 1+ ( 10*diff + ((diff/2)*(diff/2)/hz))/hz; 20668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (use_rtt_scaling && minRTT) { 20698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t scale = (hz<<3)/(10*minRTT); 20708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen scale = min(max(scale, 1U<<2), 10U<<3); /* clamping ratio to interval [0.5,10]<<3 */ 20718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen factor = (factor<<3)/scale; 20728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (!factor) 20738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen factor = 1; 20748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 20758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->alpha = 2*factor*((1<<7)-ca->beta); 20778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (!ca->alpha) 20788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ca->alpha = ALPHA_BASE; 20798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 20808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/* After we have the rtt data to calculate beta, we'd still prefer to wait one 20828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * rtt before we adjust our beta to ensure we are working from a consistent 20838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * data. 20848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 20858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * This function should be called when we hit a congestion event since only at 20868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * that point do we really have a real sense of maxRTT (the queues en route 20878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * were getting just too full now). 20888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 20898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 20900ac02f34d6041cd0018437596a5a9a94685e6919tuexenhtcp_param_update(struct sctp_nets *net) 20918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 20928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t minRTT = net->cc_mod.htcp_ca.minRTT; 20938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen uint32_t maxRTT = net->cc_mod.htcp_ca.maxRTT; 20948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen htcp_beta_update(&net->cc_mod.htcp_ca, minRTT, maxRTT); 20968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen htcp_alpha_update(&net->cc_mod.htcp_ca); 20978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 20988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* add slowly fading memory for maxRTT to accommodate routing changes etc */ 20998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (minRTT > 0 && maxRTT > minRTT) 21008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.maxRTT = minRTT + ((maxRTT-minRTT)*95)/100; 21018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 21028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic uint32_t 21040ac02f34d6041cd0018437596a5a9a94685e6919tuexenhtcp_recalc_ssthresh(struct sctp_nets *net) 21058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 21060ac02f34d6041cd0018437596a5a9a94685e6919tuexen htcp_param_update(net); 2107b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (max(((net->cwnd/net->mtu * net->cc_mod.htcp_ca.beta) >> 7)*net->mtu, 2U*net->mtu)); 21088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 21098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 21118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_cong_avoid(struct sctp_tcb *stcb, struct sctp_nets *net) 21128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 21138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /*- 21148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * How to handle these functions? 21158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * if (!tcp_is_cwnd_limited(sk, in_flight)) RRS - good question. 21168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * return; 21178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 21188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->cwnd <= net->ssthresh) { 21198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* We are in slow start */ 21208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->flight_size + net->net_ack >= net->cwnd) { 21218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack > (net->mtu * SCTP_BASE_SYSCTL(sctp_L2_abc_variable))) { 21228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += (net->mtu * SCTP_BASE_SYSCTL(sctp_L2_abc_variable)); 21238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 21248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, 21258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_SS); 21268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 21298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->net_ack; 21308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 21318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, 21328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_SS); 21338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 21378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 21388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, 21398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NOADV_SS); 21408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 21430ac02f34d6041cd0018437596a5a9a94685e6919tuexen measure_rtt(net); 21448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* In dangerous area, increase slowly. 21468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * In theory this is net->cwnd += alpha / net->cwnd 21478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 21488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* What is snd_cwnd_cnt?? */ 21498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (((net->partial_bytes_acked/net->mtu * net->cc_mod.htcp_ca.alpha) >> 7)*net->mtu >= net->cwnd) { 21508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /*- 21518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Does SCTP have a cwnd clamp? 21528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * if (net->snd_cwnd < net->snd_cwnd_clamp) - Nope (RRS). 21538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 21548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd += net->mtu; 21558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 21568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen htcp_alpha_update(&net->cc_mod.htcp_ca); 21578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 21588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, 21598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_CA); 21608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 21628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked += net->net_ack; 21638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 21648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->net_ack, 21658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NOADV_CA); 21668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.bytes_acked = net->mtu; 21708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 21718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 21728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef SCTP_NOT_USED 21748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/* Lower bound on congestion window. */ 21758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic uint32_t 21768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenhtcp_min_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net) 21778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 2178b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen return (net->ssthresh); 21798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 21808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 21818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 21830ac02f34d6041cd0018437596a5a9a94685e6919tuexenhtcp_init(struct sctp_nets *net) 21848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 21858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen memset(&net->cc_mod.htcp_ca, 0, sizeof(struct htcp)); 21868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.alpha = ALPHA_BASE; 21878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.beta = BETA_MIN; 21888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.bytes_acked = net->mtu; 21898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cc_mod.htcp_ca.last_cong = sctp_get_tick_count(); 21908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 21918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 21928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 21938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_htcp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net) 21948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 21958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 21968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * We take the max of the burst limit times a MTU or the 21978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * INITIAL_CWND. We then limit this to 4 MTU's of sending. 21988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 21998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); 22008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = stcb->asoc.peers_rwnd; 22010ac02f34d6041cd0018437596a5a9a94685e6919tuexen htcp_init(net); 22028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 22038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE|SCTP_CWND_LOGGING_ENABLE)) { 22048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION); 22058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 22078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 22088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 22098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_htcp_cwnd_update_after_sack(struct sctp_tcb *stcb, 22108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc, 22110ac02f34d6041cd0018437596a5a9a94685e6919tuexen int accum_moved, int reneged_all SCTP_UNUSED, int will_exit) 22128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 22138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net; 22140ac02f34d6041cd0018437596a5a9a94685e6919tuexen 22158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /******************************/ 22168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* update cwnd and Early FR */ 22178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /******************************/ 22188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 22198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 22208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef JANA_CMT_FAST_RECOVERY 22218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 22228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery code. Need to debug. 22238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 22248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->fast_retran_loss_recovery && net->new_pseudo_cumack) { 22258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_TSN_GE(asoc->last_acked_seq, net->fast_recovery_tsn) || 22268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_TSN_GE(net->pseudo_cumack,net->fast_recovery_tsn)) { 22278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->will_exit_fast_recovery = 1; 22288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 22318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* if nothing was acked on this destination skip it */ 22328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack == 0) { 22338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 22348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, 0, SCTP_CWND_LOG_FROM_SACK); 22358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen continue; 22378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#ifdef JANA_CMT_FAST_RECOVERY 22398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* CMT fast recovery code 22408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 22418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 22428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (sctp_cmt_on_off > 0 && net->fast_retran_loss_recovery && net->will_exit_fast_recovery == 0) { 22438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen @@@ Do something 22448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen else if (sctp_cmt_on_off == 0 && asoc->fast_retran_loss_recovery && will_exit == 0) { 22468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 22478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 22488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 22498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (asoc->fast_retran_loss_recovery && 22508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen will_exit == 0 && 22518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off == 0)) { 22528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 22538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * If we are in loss recovery we skip any cwnd 22548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * update 22558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 22568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen return; 22578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 22598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT: CUC algorithm. Update cwnd if pseudo-cumack has 22608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * moved. 22618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 22628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (accum_moved || 22638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ((asoc->sctp_cmt_on_off > 0) && net->new_pseudo_cumack)) { 22648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen htcp_cong_avoid(stcb, net); 22650ac02f34d6041cd0018437596a5a9a94685e6919tuexen measure_achieved_throughput(net); 22668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 22678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 22688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->mtu, 22698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_NO_CUMACK); 22708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 22738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 22748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 22758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 22768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_htcp_cwnd_update_after_fr(struct sctp_tcb *stcb, 22778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_association *asoc) 22788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 22798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net; 22808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 22818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery code. Need to debug. ((sctp_cmt_on_off > 0) && 22828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * (net->fast_retran_loss_recovery == 0))) 22838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 22848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 22858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if ((asoc->fast_retran_loss_recovery == 0) || 22868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (asoc->sctp_cmt_on_off > 0)) { 22878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* out of a RFC2582 Fast recovery window? */ 22888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->net_ack > 0) { 22898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 22908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * per section 7.2.3, are there any 22918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * destinations that had a fast retransmit 22928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * to them. If so what we need to do is 22938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * adjust ssthresh and cwnd. 22948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 22958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_tmit_chunk *lchk; 22968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 22978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 22988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* JRS - reset as if state were changed */ 22998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen htcp_reset(&net->cc_mod.htcp_ca); 23000ac02f34d6041cd0018437596a5a9a94685e6919tuexen net->ssthresh = htcp_recalc_ssthresh(net); 23018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->ssthresh; 23028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 23038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), 23048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_CWND_LOG_FROM_FR); 23058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen lchk = TAILQ_FIRST(&asoc->send_queue); 23078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 23098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Turn on fast recovery window */ 23108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_retran_loss_recovery = 1; 23118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (lchk == NULL) { 23128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Mark end of the window */ 23138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_recovery_tsn = asoc->sending_seq - 1; 23148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 23158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen asoc->fast_recovery_tsn = lchk->rec.data.TSN_seq - 1; 23168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 23198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CMT fast recovery -- per destination 23208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * recovery variable. 23218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 23228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_retran_loss_recovery = 1; 23238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (lchk == NULL) { 23258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Mark end of the window */ 23268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_recovery_tsn = asoc->sending_seq - 1; 23278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 23288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->fast_recovery_tsn = lchk->rec.data.TSN_seq - 1; 23298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_timer_stop(SCTP_TIMER_TYPE_SEND, 2332b7ebbfc1bd4420174e2a11b3b2bfd64281f44032tuexen stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INDATA+SCTP_LOC_32); 23338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_timer_start(SCTP_TIMER_TYPE_SEND, 23348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen stcb->sctp_ep, stcb, net); 23358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (net->net_ack > 0) { 23378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 23388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Mark a peg that we WOULD have done a cwnd 23398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * reduction but RFC2582 prevented this action. 23408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 23418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_STAT_INCR(sctps_fastretransinrtt); 23428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 23458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 23478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_htcp_cwnd_update_after_timeout(struct sctp_tcb *stcb, 23488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen struct sctp_nets *net) 23498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 23508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd = net->cwnd; 23518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* JRS - reset as if the state were being changed to timeout */ 23538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen htcp_reset(&net->cc_mod.htcp_ca); 23540ac02f34d6041cd0018437596a5a9a94685e6919tuexen net->ssthresh = htcp_recalc_ssthresh(net); 23558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->mtu; 23568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->partial_bytes_acked = 0; 23578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 23588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, net->cwnd - old_cwnd, SCTP_CWND_LOG_FROM_RTX); 23598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 23618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 23638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexensctp_htcp_cwnd_update_after_ecn_echo(struct sctp_tcb *stcb, 23640ac02f34d6041cd0018437596a5a9a94685e6919tuexen struct sctp_nets *net, int in_window, int num_pkt_lost SCTP_UNUSED) 23658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 23668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int old_cwnd; 23678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen old_cwnd = net->cwnd; 23688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* JRS - reset hctp as if state changed */ 23708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (in_window == 0) { 23718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen htcp_reset(&net->cc_mod.htcp_ca); 23728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen SCTP_STAT_INCR(sctps_ecnereducedcwnd); 23730ac02f34d6041cd0018437596a5a9a94685e6919tuexen net->ssthresh = htcp_recalc_ssthresh(net); 23748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (net->ssthresh < net->mtu) { 23758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->ssthresh = net->mtu; 23768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* here back off the timer as well, to slow us down */ 23778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->RTO <<= 1; 23788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen net->cwnd = net->ssthresh; 23808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 23818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 23828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 23848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 23858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 23868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstruct sctp_cc_functions sctp_cc_functions[] = { 23878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 23880612043f643c9b26245564c05defca64d472060etuexen#if defined(__Windows__) || defined(__Userspace_os_Windows) 23898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_set_initial_cc_param, 23908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_sack, 23918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_exit_pf_common, 23928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_fr, 23938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_timeout, 23948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_ecn_echo, 23958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_packet_dropped, 23968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_output, 23978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#else 23988c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_set_initial_cc_param = sctp_set_initial_cc_param, 23998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_sack = sctp_cwnd_update_after_sack, 24008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_exit_pf = sctp_cwnd_update_exit_pf_common, 24018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_fr = sctp_cwnd_update_after_fr, 24028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_timeout = sctp_cwnd_update_after_timeout, 24038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_ecn_echo = sctp_cwnd_update_after_ecn_echo, 24048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_packet_dropped = sctp_cwnd_update_after_packet_dropped, 24058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_output = sctp_cwnd_update_after_output, 24068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 24078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen}, 24088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 24090612043f643c9b26245564c05defca64d472060etuexen#if defined(__Windows__) || defined(__Userspace_os_Windows) 24108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_set_initial_cc_param, 24118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_hs_cwnd_update_after_sack, 24128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_exit_pf_common, 24138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_hs_cwnd_update_after_fr, 24148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_timeout, 24158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_ecn_echo, 24168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_packet_dropped, 24178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_output, 24188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#else 24198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_set_initial_cc_param = sctp_set_initial_cc_param, 24208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_sack = sctp_hs_cwnd_update_after_sack, 24218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_exit_pf = sctp_cwnd_update_exit_pf_common, 24228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_fr = sctp_hs_cwnd_update_after_fr, 24238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_timeout = sctp_cwnd_update_after_timeout, 24248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_ecn_echo = sctp_cwnd_update_after_ecn_echo, 24258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_packet_dropped = sctp_cwnd_update_after_packet_dropped, 24268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_output = sctp_cwnd_update_after_output, 24278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 24288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen}, 24298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 24300612043f643c9b26245564c05defca64d472060etuexen#if defined(__Windows__) || defined(__Userspace_os_Windows) 24318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_htcp_set_initial_cc_param, 24328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_htcp_cwnd_update_after_sack, 24338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_exit_pf_common, 24348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_htcp_cwnd_update_after_fr, 24358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_htcp_cwnd_update_after_timeout, 24368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_htcp_cwnd_update_after_ecn_echo, 24378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_packet_dropped, 24388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_output, 24398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#else 24408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_set_initial_cc_param = sctp_htcp_set_initial_cc_param, 24418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_sack = sctp_htcp_cwnd_update_after_sack, 24428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_exit_pf = sctp_cwnd_update_exit_pf_common, 24438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_fr = sctp_htcp_cwnd_update_after_fr, 24448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_timeout = sctp_htcp_cwnd_update_after_timeout, 24458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_ecn_echo = sctp_htcp_cwnd_update_after_ecn_echo, 24468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_packet_dropped = sctp_cwnd_update_after_packet_dropped, 24478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_output = sctp_cwnd_update_after_output, 24488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 24498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen}, 24508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 24510612043f643c9b26245564c05defca64d472060etuexen#if defined(__Windows__) || defined(__Userspace_os_Windows) 24528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_set_rtcc_initial_cc_param, 24538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_rtcc_after_sack, 24548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_exit_pf_common, 24558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_fr, 24568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_timeout, 24578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_rtcc_after_ecn_echo, 24588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_packet_dropped, 24598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_after_output, 24608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_rtcc_packet_transmitted, 24618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_update_rtcc_tsn_acknowledged, 24628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_new_rtcc_transmission_begins, 24638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_prepare_rtcc_net_for_sack, 24648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_cwnd_rtcc_socket_option, 24658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen sctp_rtt_rtcc_calculated 24668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#else 24678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_set_initial_cc_param = sctp_set_rtcc_initial_cc_param, 24688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_sack = sctp_cwnd_update_rtcc_after_sack, 24698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_exit_pf = sctp_cwnd_update_exit_pf_common, 24708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_fr = sctp_cwnd_update_after_fr, 24718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_timeout = sctp_cwnd_update_after_timeout, 24728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_ecn_echo = sctp_cwnd_update_rtcc_after_ecn_echo, 24738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_packet_dropped = sctp_cwnd_update_after_packet_dropped, 24748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_after_output = sctp_cwnd_update_after_output, 24758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_packet_transmitted = sctp_cwnd_update_rtcc_packet_transmitted, 24768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_update_tsn_acknowledged = sctp_cwnd_update_rtcc_tsn_acknowledged, 24778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_new_transmission_begins = sctp_cwnd_new_rtcc_transmission_begins, 24788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_prepare_net_for_sack = sctp_cwnd_prepare_rtcc_net_for_sack, 24798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_cwnd_socket_option = sctp_cwnd_rtcc_socket_option, 24808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen .sctp_rtt_calculated = sctp_rtt_rtcc_calculated 24818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#endif 24828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 24838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen}; 2484