17c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo/* 27c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * net/dccp/proto.c 37c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * 47c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * An implementation of the DCCP protocol 57c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * Arnaldo Carvalho de Melo <acme@conectiva.com.br> 67c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * 77c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * This program is free software; you can redistribute it and/or modify it 87c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * under the terms of the GNU General Public License version 2 as 97c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * published by the Free Software Foundation. 107c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo */ 117c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 127c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/dccp.h> 137c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/module.h> 147c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/types.h> 157c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/sched.h> 167c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/kernel.h> 177c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/skbuff.h> 187c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/netdevice.h> 197c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/in.h> 207c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/if_arp.h> 217c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/init.h> 227c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/random.h> 235a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 247c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <net/checksum.h> 257c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 2614c850212ed8f8cbb5972ad6b8812e08a0bc901cArnaldo Carvalho de Melo#include <net/inet_sock.h> 277c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <net/sock.h> 287c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <net/xfrm.h> 297c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 306273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo#include <asm/ioctls.h> 317c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/spinlock.h> 327c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/timer.h> 337c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/delay.h> 347c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include <linux/poll.h> 357c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 367c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include "ccid.h" 377c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo#include "dccp.h" 38afe00251dd9b53d51de91ff0099961f42bbf3754Andrea Bittau#include "feat.h" 397c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 40ba89966c1984513f4f2cc0a6c182266be44ddd03Eric DumazetDEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly; 417c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 42f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_statistics); 43f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 44dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1Eric Dumazetstruct percpu_counter dccp_orphan_count; 45f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_orphan_count); 46f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 475caea4ea7088e80ac5410d04660346094608b909Eric Dumazetstruct inet_hashinfo dccp_hashinfo; 48075ae86611011e1acdda9df6a7e30f8508b31fd6Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_hashinfo); 49075ae86611011e1acdda9df6a7e30f8508b31fd6Arnaldo Carvalho de Melo 50b1308dc015eb09cf094ca169296738a13ae049adIan McDonald/* the maximum queue length for tx in packets. 0 is no limit */ 51b1308dc015eb09cf094ca169296738a13ae049adIan McDonaldint sysctl_dccp_tx_qlen __read_mostly = 5; 52b1308dc015eb09cf094ca169296738a13ae049adIan McDonald 531f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger#ifdef CONFIG_IP_DCCP_DEBUG 541f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemmingerstatic const char *dccp_state_name(const int state) 551f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger{ 561f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger static const char *const dccp_state_names[] = { 571f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_OPEN] = "OPEN", 581f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_REQUESTING] = "REQUESTING", 591f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_PARTOPEN] = "PARTOPEN", 601f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_LISTEN] = "LISTEN", 611f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_RESPOND] = "RESPOND", 621f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_CLOSING] = "CLOSING", 631f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_ACTIVE_CLOSEREQ] = "CLOSEREQ", 641f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_PASSIVE_CLOSE] = "PASSIVE_CLOSE", 651f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_PASSIVE_CLOSEREQ] = "PASSIVE_CLOSEREQ", 661f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_TIME_WAIT] = "TIME_WAIT", 671f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger [DCCP_CLOSED] = "CLOSED", 681f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger }; 691f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger 701f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger if (state >= DCCP_MAX_STATES) 711f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger return "INVALID STATE!"; 721f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger else 731f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger return dccp_state_names[state]; 741f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger} 751f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger#endif 761f4f0f645cc1d7f1187fcdb0ac22c2e69bd68050stephen hemminger 77c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melovoid dccp_set_state(struct sock *sk, const int state) 78c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo{ 79c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo const int oldstate = sk->sk_state; 80c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 81f11135a3442996d78dad99933bfdb90d1f6588d3Gerrit Renker dccp_pr_debug("%s(%p) %s --> %s\n", dccp_role(sk), sk, 82c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo dccp_state_name(oldstate), dccp_state_name(state)); 83c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo WARN_ON(state == oldstate); 84c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 85c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo switch (state) { 86c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo case DCCP_OPEN: 87c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo if (oldstate != DCCP_OPEN) 88c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo DCCP_INC_STATS(DCCP_MIB_CURRESTAB); 896eb55d172b5f6de65afdae6285f8d732e4785bf7Gerrit Renker /* Client retransmits all Confirm options until entering OPEN */ 906eb55d172b5f6de65afdae6285f8d732e4785bf7Gerrit Renker if (oldstate == DCCP_PARTOPEN) 916eb55d172b5f6de65afdae6285f8d732e4785bf7Gerrit Renker dccp_feat_list_purge(&dccp_sk(sk)->dccps_featneg); 92c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo break; 93c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 94c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo case DCCP_CLOSED: 950c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker if (oldstate == DCCP_OPEN || oldstate == DCCP_ACTIVE_CLOSEREQ || 960c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker oldstate == DCCP_CLOSING) 97c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo DCCP_INC_STATS(DCCP_MIB_ESTABRESETS); 98c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 99c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo sk->sk_prot->unhash(sk); 100c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo if (inet_csk(sk)->icsk_bind_hash != NULL && 101c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo !(sk->sk_userlocks & SOCK_BINDPORT_LOCK)) 102ab1e0a13d70299e792fd0527cefd070c1405fa5bArnaldo Carvalho de Melo inet_put_port(sk); 103c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo /* fall through */ 104c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo default: 105c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo if (oldstate == DCCP_OPEN) 106c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo DCCP_DEC_STATS(DCCP_MIB_CURRESTAB); 107c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo } 108c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 109c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo /* Change state AFTER socket is unhashed to avoid closed 110c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo * socket sitting in hash tables. 111c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo */ 112c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo sk->sk_state = state; 113c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo} 114c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 115c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_set_state); 116c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 1170c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renkerstatic void dccp_finish_passive_close(struct sock *sk) 1180c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker{ 1190c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker switch (sk->sk_state) { 1200c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PASSIVE_CLOSE: 1210c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker /* Node (client or server) has received Close packet. */ 1220c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED); 1230c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_set_state(sk, DCCP_CLOSED); 1240c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker break; 1250c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PASSIVE_CLOSEREQ: 1260c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker /* 1270c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker * Client received CloseReq. We set the `active' flag so that 1280c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker * dccp_send_close() retransmits the Close as per RFC 4340, 8.3. 1290c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker */ 1300c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_send_close(sk, 1); 1310c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_set_state(sk, DCCP_CLOSING); 1320c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker } 1330c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker} 1340c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker 135c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melovoid dccp_done(struct sock *sk) 136c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo{ 137c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo dccp_set_state(sk, DCCP_CLOSED); 138c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo dccp_clear_xmit_timers(sk); 139c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 140c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo sk->sk_shutdown = SHUTDOWN_MASK; 141c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 142c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo if (!sock_flag(sk, SOCK_DEAD)) 143c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo sk->sk_state_change(sk); 144c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo else 145c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo inet_csk_destroy_sock(sk); 146c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo} 147c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 148c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_done); 149c25a18ba347f091d1ce620ba33e6772b60a528e1Arnaldo Carvalho de Melo 1507c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloconst char *dccp_packet_name(const int type) 1517c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 15236cbd3dcc10384f813ec0814255f576c84f2bcd4Jan Engelhardt static const char *const dccp_packet_names[] = { 1537c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_REQUEST] = "REQUEST", 1547c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_RESPONSE] = "RESPONSE", 1557c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_DATA] = "DATA", 1567c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_ACK] = "ACK", 1577c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_DATAACK] = "DATAACK", 1587c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_CLOSEREQ] = "CLOSEREQ", 1597c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_CLOSE] = "CLOSE", 1607c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_RESET] = "RESET", 1617c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_SYNC] = "SYNC", 1627c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo [DCCP_PKT_SYNCACK] = "SYNCACK", 1637c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo }; 1647c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1657c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (type >= DCCP_NR_PKT_TYPES) 1667c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo return "INVALID"; 1677c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo else 1687c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo return dccp_packet_names[type]; 1697c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 1707c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1717c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_packet_name); 1727c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 17372478873571d869906f7a250b09e12fa5b65e321Arnaldo Carvalho de Meloint dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized) 1743e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo{ 1753e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo struct dccp_sock *dp = dccp_sk(sk); 1763e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1773e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 178e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo icsk->icsk_rto = DCCP_TIMEOUT_INIT; 179e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo icsk->icsk_syn_retries = sysctl_dccp_request_retries; 180e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo sk->sk_state = DCCP_CLOSED; 181e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo sk->sk_write_space = dccp_write_space; 182e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo icsk->icsk_sync_mss = dccp_sync_mss; 183410e27a49bb98bc7fa3ff5fc05cc313817b9f253Gerrit Renker dp->dccps_mss_cache = 536; 184e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo dp->dccps_rate_last = jiffies; 185e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo dp->dccps_role = DCCP_ROLE_UNDEFINED; 186e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo dp->dccps_service = DCCP_SERVICE_CODE_IS_ABSENT; 187871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny dp->dccps_tx_qlen = sysctl_dccp_tx_qlen; 188e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo 189e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo dccp_init_xmit_timers(sk); 190e18d7a9857cb620a8f70622c4e400be477c264cfArnaldo Carvalho de Melo 191ac75773c2742d82cbcb078708df406e9017224b7Gerrit Renker INIT_LIST_HEAD(&dp->dccps_featneg); 1926eb55d172b5f6de65afdae6285f8d732e4785bf7Gerrit Renker /* control socket doesn't need feat nego */ 1936eb55d172b5f6de65afdae6285f8d732e4785bf7Gerrit Renker if (likely(ctl_sock_initialized)) 1946eb55d172b5f6de65afdae6285f8d732e4785bf7Gerrit Renker return dccp_feat_init(sk); 1953e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo return 0; 1963e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo} 1973e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 1983e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_init_sock); 1993e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 2007d06b2e053d2d536348e3a0f6bb02982a41bea37Brian Haleyvoid dccp_destroy_sock(struct sock *sk) 2013e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo{ 2023e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo struct dccp_sock *dp = dccp_sk(sk); 2033e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 2043e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo /* 2053e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo * DCCP doesn't use sk_write_queue, just sk_send_head 2063e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo * for retransmissions 2073e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo */ 2083e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo if (sk->sk_send_head != NULL) { 2093e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo kfree_skb(sk->sk_send_head); 2103e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo sk->sk_send_head = NULL; 2113e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo } 2123e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 2133e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo /* Clean up a referenced DCCP bind bucket. */ 2143e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo if (inet_csk(sk)->icsk_bind_hash != NULL) 215ab1e0a13d70299e792fd0527cefd070c1405fa5bArnaldo Carvalho de Melo inet_put_port(sk); 2163e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 2173e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo kfree(dp->dccps_service_list); 2183e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo dp->dccps_service_list = NULL; 2193e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 2206fdd34d43bff8be9bb925b49d87a0ee144d2ab07Gerrit Renker if (dp->dccps_hc_rx_ackvec != NULL) { 2213e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo dccp_ackvec_free(dp->dccps_hc_rx_ackvec); 2223e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo dp->dccps_hc_rx_ackvec = NULL; 2233e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo } 2243e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); 2253e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); 2263e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; 2273e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 2283e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo /* clean up feature negotiation state */ 229d99a7bd210a14001007fc5233597c78877f0a11cGerrit Renker dccp_feat_list_purge(&dp->dccps_featneg); 2303e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo} 2313e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 2323e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_destroy_sock); 2333e0fadc51f2fde01e0e22f481370a9b5f073bfc3Arnaldo Carvalho de Melo 23472a3effaf633bcae9034b7e176bdbd78d64a71dbEric Dumazetstatic inline int dccp_listen_start(struct sock *sk, int backlog) 2357c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 23667e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo struct dccp_sock *dp = dccp_sk(sk); 23767e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 23867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo dp->dccps_role = DCCP_ROLE_LISTEN; 2399eca0a47dee201a73967026985b5f0a79a46bd36Gerrit Renker /* do not start to listen if feature negotiation setup fails */ 2409eca0a47dee201a73967026985b5f0a79a46bd36Gerrit Renker if (dccp_feat_finalise_settings(dp)) 2419eca0a47dee201a73967026985b5f0a79a46bd36Gerrit Renker return -EPROTO; 24272a3effaf633bcae9034b7e176bdbd78d64a71dbEric Dumazet return inet_csk_listen_start(sk, backlog); 2437c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 2447c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 245ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renkerstatic inline int dccp_need_reset(int state) 246ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker{ 247ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker return state != DCCP_CLOSED && state != DCCP_LISTEN && 248ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker state != DCCP_REQUESTING; 249ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker} 250ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker 2517c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloint dccp_disconnect(struct sock *sk, int flags) 2527c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 2537c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 2547c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 2557c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo int err = 0; 2567c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo const int old_state = sk->sk_state; 2577c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 2587c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (old_state != DCCP_CLOSED) 2597c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo dccp_set_state(sk, DCCP_CLOSED); 2607c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 261ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker /* 262ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker * This corresponds to the ABORT function of RFC793, sec. 3.8 263ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker * TCP uses a RST segment, DCCP a Reset packet with Code 2, "Aborted". 264ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker */ 2657c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (old_state == DCCP_LISTEN) { 2667c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo inet_csk_listen_stop(sk); 267ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker } else if (dccp_need_reset(old_state)) { 268ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); 269ce865a61c810c971b47f57c729ec6e9b2d522d94Gerrit Renker sk->sk_err = ECONNRESET; 2707c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } else if (old_state == DCCP_REQUESTING) 2717c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk->sk_err = ECONNRESET; 2727c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 2737c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo dccp_clear_xmit_timers(sk); 27448816322ad4d9ce195aaddd10f0ce98c944af193Gerrit Renker 2757c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo __skb_queue_purge(&sk->sk_receive_queue); 27648816322ad4d9ce195aaddd10f0ce98c944af193Gerrit Renker __skb_queue_purge(&sk->sk_write_queue); 2777c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (sk->sk_send_head != NULL) { 2787c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo __kfree_skb(sk->sk_send_head); 2797c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk->sk_send_head = NULL; 2807c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 2817c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 282c720c7e8383aff1cb219bddf474ed89d850336e3Eric Dumazet inet->inet_dport = 0; 2837c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 2847c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK)) 2857c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo inet_reset_saddr(sk); 2867c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 2877c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk->sk_shutdown = 0; 2887c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sock_reset_flag(sk, SOCK_DONE); 2897c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 2907c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo icsk->icsk_backoff = 0; 2917c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo inet_csk_delack_init(sk); 2927c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo __sk_dst_reset(sk); 2937c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 294c720c7e8383aff1cb219bddf474ed89d850336e3Eric Dumazet WARN_ON(inet->inet_num && !icsk->icsk_bind_hash); 2957c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 2967c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk->sk_error_report(sk); 2977c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo return err; 2987c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 2997c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 300f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_disconnect); 301f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 302331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo/* 303331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo * Wait for a DCCP event. 304331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo * 305331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo * Note that we don't need to lock the socket, as the upper poll layers 306331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo * take care of normal races (between the test and the event) and we don't 307331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo * go look at any of the socket buffers directly. 308331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo */ 309f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melounsigned int dccp_poll(struct file *file, struct socket *sock, 310f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo poll_table *wait) 311331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo{ 312331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo unsigned int mask; 313331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo struct sock *sk = sock->sk; 314331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 315aa395145165cb06a0d0885221bbe0ce4a564391dEric Dumazet sock_poll_wait(file, sk_sleep(sk), wait); 316331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo if (sk->sk_state == DCCP_LISTEN) 317331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo return inet_csk_listen_poll(sk); 318331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 319331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo /* Socket is not locked. We are protected from async events 320331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo by poll logic and correct handling of state changes 321331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo made by another threads is impossible in any case. 322331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo */ 323331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 324331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo mask = 0; 325331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo if (sk->sk_err) 326331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo mask = POLLERR; 327331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 328331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED) 329331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo mask |= POLLHUP; 330331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo if (sk->sk_shutdown & RCV_SHUTDOWN) 331f348d70a324e15afc701a494f32ec468abb7d1ebDavide Libenzi mask |= POLLIN | POLLRDNORM | POLLRDHUP; 332331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 333331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo /* Connected? */ 334331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) { 335331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo if (atomic_read(&sk->sk_rmem_alloc) > 0) 336331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo mask |= POLLIN | POLLRDNORM; 337331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 338331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { 33964dc61306ce7da370833289739e2f52dfc6b37baEric Dumazet if (sk_stream_is_writeable(sk)) { 340331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo mask |= POLLOUT | POLLWRNORM; 341331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo } else { /* send SIGIO later */ 342331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo set_bit(SOCK_ASYNC_NOSPACE, 343331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo &sk->sk_socket->flags); 344331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); 345331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 346331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo /* Race breaker. If space is freed after 347331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo * wspace test but before the flags are set, 348331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo * IO signal will be lost. 349331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo */ 35064dc61306ce7da370833289739e2f52dfc6b37baEric Dumazet if (sk_stream_is_writeable(sk)) 351331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo mask |= POLLOUT | POLLWRNORM; 352331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo } 353331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo } 354331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo } 355331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo return mask; 356331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo} 357331968bd0c1b2437f3ad773cbf55f2e0737bafc0Arnaldo Carvalho de Melo 358f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_poll); 359f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 3607c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloint dccp_ioctl(struct sock *sk, int cmd, unsigned long arg) 3617c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 3626273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo int rc = -ENOTCONN; 3636273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo 3646273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo lock_sock(sk); 3656273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo 3666273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo if (sk->sk_state == DCCP_LISTEN) 3676273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo goto out; 3686273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo 3696273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo switch (cmd) { 3706273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo case SIOCINQ: { 3716273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo struct sk_buff *skb; 3726273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo unsigned long amount = 0; 3736273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo 3746273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo skb = skb_peek(&sk->sk_receive_queue); 3756273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo if (skb != NULL) { 3766273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo /* 3776273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo * We will only return the amount of this packet since 3786273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo * that is all that will be read. 3796273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo */ 3806273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo amount = skb->len; 3816273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo } 3826273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo rc = put_user(amount, (int __user *)arg); 3836273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo } 3846273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo break; 3856273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo default: 3866273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo rc = -ENOIOCTLCMD; 3876273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo break; 3886273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo } 3896273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Meloout: 3906273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo release_sock(sk); 3916273172e1772bf5ce8697bcae145f0f2954fd159Arnaldo Carvalho de Melo return rc; 3927c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 3937c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 394f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_ioctl); 395f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 39660fe62e789076ae7c13f7ffb35fec4b24802530dAndrea Bittaustatic int dccp_setsockopt_service(struct sock *sk, const __be32 service, 397b7058842c940ad2c08dd829b21e5c92ebe3b8758David S. Miller char __user *optval, unsigned int optlen) 39867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo{ 39967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo struct dccp_sock *dp = dccp_sk(sk); 40067e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo struct dccp_service_list *sl = NULL; 40167e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 4028109b02b5397ed52a32c116163a62a34f4768b26Arnaldo Carvalho de Melo if (service == DCCP_SERVICE_INVALID_VALUE || 40367e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) 40467e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo return -EINVAL; 40567e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 40667e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo if (optlen > sizeof(service)) { 40767e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo sl = kmalloc(optlen, GFP_KERNEL); 40867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo if (sl == NULL) 40967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo return -ENOMEM; 41067e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 41167e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo sl->dccpsl_nr = optlen / sizeof(u32) - 1; 41267e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo if (copy_from_user(sl->dccpsl_list, 41367e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo optval + sizeof(service), 41467e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo optlen - sizeof(service)) || 41567e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) { 41667e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo kfree(sl); 41767e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo return -EFAULT; 41867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo } 41967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo } 42067e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 42167e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo lock_sock(sk); 42267e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo dp->dccps_service = service; 42367e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 424a51482bde22f99c63fbbb57d5d46cc666384e379Jesper Juhl kfree(dp->dccps_service_list); 42567e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 42667e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo dp->dccps_service_list = sl; 42767e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo release_sock(sk); 42867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo return 0; 42967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo} 43067e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 43129450559849da7066813601effb7666966869853Gerrit Renkerstatic int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx) 43229450559849da7066813601effb7666966869853Gerrit Renker{ 43329450559849da7066813601effb7666966869853Gerrit Renker u8 *list, len; 43429450559849da7066813601effb7666966869853Gerrit Renker int i, rc; 43529450559849da7066813601effb7666966869853Gerrit Renker 43629450559849da7066813601effb7666966869853Gerrit Renker if (cscov < 0 || cscov > 15) 43729450559849da7066813601effb7666966869853Gerrit Renker return -EINVAL; 43829450559849da7066813601effb7666966869853Gerrit Renker /* 43929450559849da7066813601effb7666966869853Gerrit Renker * Populate a list of permissible values, in the range cscov...15. This 44029450559849da7066813601effb7666966869853Gerrit Renker * is necessary since feature negotiation of single values only works if 44129450559849da7066813601effb7666966869853Gerrit Renker * both sides incidentally choose the same value. Since the list starts 44229450559849da7066813601effb7666966869853Gerrit Renker * lowest-value first, negotiation will pick the smallest shared value. 44329450559849da7066813601effb7666966869853Gerrit Renker */ 44429450559849da7066813601effb7666966869853Gerrit Renker if (cscov == 0) 44529450559849da7066813601effb7666966869853Gerrit Renker return 0; 44629450559849da7066813601effb7666966869853Gerrit Renker len = 16 - cscov; 44729450559849da7066813601effb7666966869853Gerrit Renker 44829450559849da7066813601effb7666966869853Gerrit Renker list = kmalloc(len, GFP_KERNEL); 44929450559849da7066813601effb7666966869853Gerrit Renker if (list == NULL) 45029450559849da7066813601effb7666966869853Gerrit Renker return -ENOBUFS; 45129450559849da7066813601effb7666966869853Gerrit Renker 45229450559849da7066813601effb7666966869853Gerrit Renker for (i = 0; i < len; i++) 45329450559849da7066813601effb7666966869853Gerrit Renker list[i] = cscov++; 45429450559849da7066813601effb7666966869853Gerrit Renker 45529450559849da7066813601effb7666966869853Gerrit Renker rc = dccp_feat_register_sp(sk, DCCPF_MIN_CSUM_COVER, rx, list, len); 45629450559849da7066813601effb7666966869853Gerrit Renker 45729450559849da7066813601effb7666966869853Gerrit Renker if (rc == 0) { 45829450559849da7066813601effb7666966869853Gerrit Renker if (rx) 45929450559849da7066813601effb7666966869853Gerrit Renker dccp_sk(sk)->dccps_pcrlen = cscov; 46029450559849da7066813601effb7666966869853Gerrit Renker else 46129450559849da7066813601effb7666966869853Gerrit Renker dccp_sk(sk)->dccps_pcslen = cscov; 46229450559849da7066813601effb7666966869853Gerrit Renker } 46329450559849da7066813601effb7666966869853Gerrit Renker kfree(list); 46429450559849da7066813601effb7666966869853Gerrit Renker return rc; 46529450559849da7066813601effb7666966869853Gerrit Renker} 46629450559849da7066813601effb7666966869853Gerrit Renker 467b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renkerstatic int dccp_setsockopt_ccid(struct sock *sk, int type, 468b7058842c940ad2c08dd829b21e5c92ebe3b8758David S. Miller char __user *optval, unsigned int optlen) 469b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker{ 470b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker u8 *val; 471b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker int rc = 0; 472b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker 473b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker if (optlen < 1 || optlen > DCCP_FEAT_MAX_SP_VALS) 474b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker return -EINVAL; 475b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker 476042604d2a3ee59c84f8293988caf35bac5de9eb3Julia Lawall val = memdup_user(optval, optlen); 477042604d2a3ee59c84f8293988caf35bac5de9eb3Julia Lawall if (IS_ERR(val)) 478042604d2a3ee59c84f8293988caf35bac5de9eb3Julia Lawall return PTR_ERR(val); 479b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker 480b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker lock_sock(sk); 481b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker if (type == DCCP_SOCKOPT_TX_CCID || type == DCCP_SOCKOPT_CCID) 482b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker rc = dccp_feat_register_sp(sk, DCCPF_CCID, 1, val, optlen); 483b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker 484b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker if (!rc && (type == DCCP_SOCKOPT_RX_CCID || type == DCCP_SOCKOPT_CCID)) 485b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker rc = dccp_feat_register_sp(sk, DCCPF_CCID, 0, val, optlen); 486b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker release_sock(sk); 487b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker 488b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker kfree(val); 489b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker return rc; 490b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker} 491b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker 4923fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishinstatic int do_dccp_setsockopt(struct sock *sk, int level, int optname, 493b7058842c940ad2c08dd829b21e5c92ebe3b8758David S. Miller char __user *optval, unsigned int optlen) 4947c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 49509dbc3895e3242346bd434dae743c456fd28fc6aGerrit Renker struct dccp_sock *dp = dccp_sk(sk); 49609dbc3895e3242346bd434dae743c456fd28fc6aGerrit Renker int val, err = 0; 4977c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 498191029963630719e867d8bd0c315d32c822622cbGerrit Renker switch (optname) { 499191029963630719e867d8bd0c315d32c822622cbGerrit Renker case DCCP_SOCKOPT_PACKET_SIZE: 500191029963630719e867d8bd0c315d32c822622cbGerrit Renker DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); 501191029963630719e867d8bd0c315d32c822622cbGerrit Renker return 0; 502191029963630719e867d8bd0c315d32c822622cbGerrit Renker case DCCP_SOCKOPT_CHANGE_L: 503191029963630719e867d8bd0c315d32c822622cbGerrit Renker case DCCP_SOCKOPT_CHANGE_R: 504191029963630719e867d8bd0c315d32c822622cbGerrit Renker DCCP_WARN("sockopt(CHANGE_L/R) is deprecated: fix your app\n"); 505191029963630719e867d8bd0c315d32c822622cbGerrit Renker return 0; 506b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker case DCCP_SOCKOPT_CCID: 507b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker case DCCP_SOCKOPT_RX_CCID: 508b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker case DCCP_SOCKOPT_TX_CCID: 509b20a9c24d5c5d466d7e4a25c6f1bedbd2d16ad4fGerrit Renker return dccp_setsockopt_ccid(sk, optname, optval, optlen); 510191029963630719e867d8bd0c315d32c822622cbGerrit Renker } 511191029963630719e867d8bd0c315d32c822622cbGerrit Renker 512191029963630719e867d8bd0c315d32c822622cbGerrit Renker if (optlen < (int)sizeof(int)) 513a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return -EINVAL; 514a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 515a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo if (get_user(val, (int __user *)optval)) 516a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return -EFAULT; 517a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 51867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo if (optname == DCCP_SOCKOPT_SERVICE) 51967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo return dccp_setsockopt_service(sk, val, optval, optlen); 520a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 52167e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo lock_sock(sk); 522a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo switch (optname) { 523b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker case DCCP_SOCKOPT_SERVER_TIMEWAIT: 524b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker if (dp->dccps_role != DCCP_ROLE_SERVER) 525b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker err = -EOPNOTSUPP; 526b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker else 527b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker dp->dccps_server_timewait = (val != 0); 528b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker break; 52929450559849da7066813601effb7666966869853Gerrit Renker case DCCP_SOCKOPT_SEND_CSCOV: 53029450559849da7066813601effb7666966869853Gerrit Renker err = dccp_setsockopt_cscov(sk, val, false); 531d6da3511d6b558d0b017777b61dc08b8fbc06ea4Tomasz Grobelny break; 53229450559849da7066813601effb7666966869853Gerrit Renker case DCCP_SOCKOPT_RECV_CSCOV: 53329450559849da7066813601effb7666966869853Gerrit Renker err = dccp_setsockopt_cscov(sk, val, true); 534d6da3511d6b558d0b017777b61dc08b8fbc06ea4Tomasz Grobelny break; 535871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny case DCCP_SOCKOPT_QPOLICY_ID: 536871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny if (sk->sk_state != DCCP_CLOSED) 537871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny err = -EISCONN; 538871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny else if (val < 0 || val >= DCCPQ_POLICY_MAX) 539871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny err = -EINVAL; 540871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny else 541871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny dp->dccps_qpolicy = val; 542871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny break; 543871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny case DCCP_SOCKOPT_QPOLICY_TXQLEN: 544871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny if (val < 0) 545871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny err = -EINVAL; 546871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny else 547871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny dp->dccps_tx_qlen = val; 548871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny break; 549a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo default: 550a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo err = -ENOPROTOOPT; 551a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo break; 552a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo } 553410e27a49bb98bc7fa3ff5fc05cc313817b9f253Gerrit Renker release_sock(sk); 554191029963630719e867d8bd0c315d32c822622cbGerrit Renker 555a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return err; 5567c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 5577c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 5583fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishinint dccp_setsockopt(struct sock *sk, int level, int optname, 559b7058842c940ad2c08dd829b21e5c92ebe3b8758David S. Miller char __user *optval, unsigned int optlen) 5603fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin{ 5613fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin if (level != SOL_DCCP) 5623fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level, 5633fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin optname, optval, 5643fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin optlen); 5653fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin return do_dccp_setsockopt(sk, level, optname, optval, optlen); 5663fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin} 567543d9cfeec4d58ad3fd974db5531b06b6b95deb4Arnaldo Carvalho de Melo 568f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_setsockopt); 569f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 5703fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin#ifdef CONFIG_COMPAT 5713fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishinint compat_dccp_setsockopt(struct sock *sk, int level, int optname, 572b7058842c940ad2c08dd829b21e5c92ebe3b8758David S. Miller char __user *optval, unsigned int optlen) 5733fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin{ 574dec73ff0293d59076d1fd8f4a264898ecfc457ecArnaldo Carvalho de Melo if (level != SOL_DCCP) 575dec73ff0293d59076d1fd8f4a264898ecfc457ecArnaldo Carvalho de Melo return inet_csk_compat_setsockopt(sk, level, optname, 576dec73ff0293d59076d1fd8f4a264898ecfc457ecArnaldo Carvalho de Melo optval, optlen); 5773fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin return do_dccp_setsockopt(sk, level, optname, optval, optlen); 5783fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin} 579543d9cfeec4d58ad3fd974db5531b06b6b95deb4Arnaldo Carvalho de Melo 5803fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry MishinEXPORT_SYMBOL_GPL(compat_dccp_setsockopt); 5813fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin#endif 5823fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin 58367e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melostatic int dccp_getsockopt_service(struct sock *sk, int len, 58460fe62e789076ae7c13f7ffb35fec4b24802530dAndrea Bittau __be32 __user *optval, 58567e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo int __user *optlen) 58667e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo{ 58767e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo const struct dccp_sock *dp = dccp_sk(sk); 58867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo const struct dccp_service_list *sl; 58967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo int err = -ENOENT, slen = 0, total_len = sizeof(u32); 59067e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 59167e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo lock_sock(sk); 59267e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo if ((sl = dp->dccps_service_list) != NULL) { 59367e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo slen = sl->dccpsl_nr * sizeof(u32); 59467e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo total_len += slen; 59567e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo } 59667e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 59767e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo err = -EINVAL; 59867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo if (total_len > len) 59967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo goto out; 60067e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 60167e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo err = 0; 60267e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo if (put_user(total_len, optlen) || 60367e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo put_user(dp->dccps_service, optval) || 60467e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen))) 60567e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo err = -EFAULT; 60667e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Meloout: 60767e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo release_sock(sk); 60867e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo return err; 60967e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo} 61067e6b629212fa9ffb7420e8a88a41806af637e28Arnaldo Carvalho de Melo 6113fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishinstatic int do_dccp_getsockopt(struct sock *sk, int level, int optname, 612a1d3a35518779df0579dd9de0121354b49c68ddcArnaldo Carvalho de Melo char __user *optval, int __user *optlen) 6137c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 614a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo struct dccp_sock *dp; 615a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo int val, len; 6167c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 617a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo if (get_user(len, optlen)) 618a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return -EFAULT; 619a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 62039ebc0276bada8bb70e067cb6d0eb71839c0fb08Arnaldo Carvalho de Melo if (len < (int)sizeof(int)) 621a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return -EINVAL; 622a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 623a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo dp = dccp_sk(sk); 624a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 625a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo switch (optname) { 626a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo case DCCP_SOCKOPT_PACKET_SIZE: 6275aed324369c94a2c38469c8288e42eb1a9fac400Gerrit Renker DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); 628841bac1d607d8bf2e068e4b24393fb77372814e3Arnaldo Carvalho de Melo return 0; 62988f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo case DCCP_SOCKOPT_SERVICE: 63088f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo return dccp_getsockopt_service(sk, len, 63160fe62e789076ae7c13f7ffb35fec4b24802530dAndrea Bittau (__be32 __user *)optval, optlen); 6327c559a9e44ee61faf2f339604ce708decb345a93Gerrit Renker case DCCP_SOCKOPT_GET_CUR_MPS: 6337c559a9e44ee61faf2f339604ce708decb345a93Gerrit Renker val = dp->dccps_mss_cache; 6347c559a9e44ee61faf2f339604ce708decb345a93Gerrit Renker break; 635d90ebcbfa7f5a8b4e20518c9f94c5c4e4cd3c2e5Gerrit Renker case DCCP_SOCKOPT_AVAILABLE_CCIDS: 636d90ebcbfa7f5a8b4e20518c9f94c5c4e4cd3c2e5Gerrit Renker return ccid_getsockopt_builtin_ccids(sk, len, optval, optlen); 63771c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker case DCCP_SOCKOPT_TX_CCID: 63871c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker val = ccid_get_current_tx_ccid(dp); 63971c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker if (val < 0) 64071c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker return -ENOPROTOOPT; 64171c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker break; 64271c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker case DCCP_SOCKOPT_RX_CCID: 64371c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker val = ccid_get_current_rx_ccid(dp); 64471c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker if (val < 0) 64571c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker return -ENOPROTOOPT; 64671c262a3dd42dea73700646d969b0af7a4102edfGerrit Renker break; 647b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker case DCCP_SOCKOPT_SERVER_TIMEWAIT: 648b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker val = dp->dccps_server_timewait; 649b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker break; 6506f4e5fff1e4d46714ea554fd83e44eab534e8b11Gerrit Renker case DCCP_SOCKOPT_SEND_CSCOV: 6516f4e5fff1e4d46714ea554fd83e44eab534e8b11Gerrit Renker val = dp->dccps_pcslen; 6526f4e5fff1e4d46714ea554fd83e44eab534e8b11Gerrit Renker break; 6536f4e5fff1e4d46714ea554fd83e44eab534e8b11Gerrit Renker case DCCP_SOCKOPT_RECV_CSCOV: 6546f4e5fff1e4d46714ea554fd83e44eab534e8b11Gerrit Renker val = dp->dccps_pcrlen; 6556f4e5fff1e4d46714ea554fd83e44eab534e8b11Gerrit Renker break; 656871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny case DCCP_SOCKOPT_QPOLICY_ID: 657871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny val = dp->dccps_qpolicy; 658871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny break; 659871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny case DCCP_SOCKOPT_QPOLICY_TXQLEN: 660871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny val = dp->dccps_tx_qlen; 661871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny break; 66288f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo case 128 ... 191: 66388f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, 66488f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo len, (u32 __user *)optval, optlen); 66588f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo case 192 ... 255: 66688f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname, 66788f964db6ef728982734356bf4c406270ea29c1dArnaldo Carvalho de Melo len, (u32 __user *)optval, optlen); 668a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo default: 669a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return -ENOPROTOOPT; 670a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo } 671a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 6727913350663e2756ecb91dd3a7c773806b943426eGerrit Renker len = sizeof(val); 673a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo if (put_user(len, optlen) || copy_to_user(optval, &val, len)) 674a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return -EFAULT; 675a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo 676a84ffe430342db6ee585a5038f3242a6b4112d69Arnaldo Carvalho de Melo return 0; 6777c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 6787c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 6793fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishinint dccp_getsockopt(struct sock *sk, int level, int optname, 6803fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin char __user *optval, int __user *optlen) 6813fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin{ 6823fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin if (level != SOL_DCCP) 6833fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level, 6843fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin optname, optval, 6853fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin optlen); 6863fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin return do_dccp_getsockopt(sk, level, optname, optval, optlen); 6873fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin} 688543d9cfeec4d58ad3fd974db5531b06b6b95deb4Arnaldo Carvalho de Melo 689f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_getsockopt); 690f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 6913fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin#ifdef CONFIG_COMPAT 6923fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishinint compat_dccp_getsockopt(struct sock *sk, int level, int optname, 693543d9cfeec4d58ad3fd974db5531b06b6b95deb4Arnaldo Carvalho de Melo char __user *optval, int __user *optlen) 6943fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin{ 695dec73ff0293d59076d1fd8f4a264898ecfc457ecArnaldo Carvalho de Melo if (level != SOL_DCCP) 696dec73ff0293d59076d1fd8f4a264898ecfc457ecArnaldo Carvalho de Melo return inet_csk_compat_getsockopt(sk, level, optname, 697dec73ff0293d59076d1fd8f4a264898ecfc457ecArnaldo Carvalho de Melo optval, optlen); 6983fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin return do_dccp_getsockopt(sk, level, optname, optval, optlen); 6993fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin} 700543d9cfeec4d58ad3fd974db5531b06b6b95deb4Arnaldo Carvalho de Melo 7013fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry MishinEXPORT_SYMBOL_GPL(compat_dccp_getsockopt); 7023fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin#endif 7033fdadf7d27e3fbcf72930941884387d1f4936f04Dmitry Mishin 704871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelnystatic int dccp_msghdr_parse(struct msghdr *msg, struct sk_buff *skb) 705871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny{ 706871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny struct cmsghdr *cmsg = CMSG_FIRSTHDR(msg); 707871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny 708871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny /* 709871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * Assign an (opaque) qpolicy priority value to skb->priority. 710871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * 711871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * We are overloading this skb field for use with the qpolicy subystem. 712871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * The skb->priority is normally used for the SO_PRIORITY option, which 713871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * is initialised from sk_priority. Since the assignment of sk_priority 714871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * to skb->priority happens later (on layer 3), we overload this field 715871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * for use with queueing priorities as long as the skb is on layer 4. 716871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny * The default priority value (if nothing is set) is 0. 717871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny */ 718871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny skb->priority = 0; 719871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny 720871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny for (; cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) { 721871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny 722871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny if (!CMSG_OK(msg, cmsg)) 723871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny return -EINVAL; 724871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny 725871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny if (cmsg->cmsg_level != SOL_DCCP) 726871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny continue; 727871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny 72804910265078f08a73208beab70ed2a3cce4a919fTomasz Grobelny if (cmsg->cmsg_type <= DCCP_SCM_QPOLICY_MAX && 72904910265078f08a73208beab70ed2a3cce4a919fTomasz Grobelny !dccp_qpolicy_param_ok(skb->sk, cmsg->cmsg_type)) 73004910265078f08a73208beab70ed2a3cce4a919fTomasz Grobelny return -EINVAL; 73104910265078f08a73208beab70ed2a3cce4a919fTomasz Grobelny 732871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny switch (cmsg->cmsg_type) { 733871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny case DCCP_SCM_PRIORITY: 734871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny if (cmsg->cmsg_len != CMSG_LEN(sizeof(__u32))) 735871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny return -EINVAL; 736871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny skb->priority = *(__u32 *)CMSG_DATA(cmsg); 737871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny break; 738871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny default: 739871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny return -EINVAL; 740871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny } 741871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny } 742871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny return 0; 743871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny} 744871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny 7457c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloint dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 7467c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo size_t len) 7477c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 7487c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo const struct dccp_sock *dp = dccp_sk(sk); 7497c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo const int flags = msg->msg_flags; 7507c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo const int noblock = flags & MSG_DONTWAIT; 7517c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo struct sk_buff *skb; 7527c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo int rc, size; 7537c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo long timeo; 7547c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 7557c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (len > dp->dccps_mss_cache) 7567c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo return -EMSGSIZE; 7577c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 7587c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo lock_sock(sk); 759b1308dc015eb09cf094ca169296738a13ae049adIan McDonald 760871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny if (dccp_qpolicy_full(sk)) { 761b1308dc015eb09cf094ca169296738a13ae049adIan McDonald rc = -EAGAIN; 762b1308dc015eb09cf094ca169296738a13ae049adIan McDonald goto out_release; 763b1308dc015eb09cf094ca169296738a13ae049adIan McDonald } 764b1308dc015eb09cf094ca169296738a13ae049adIan McDonald 76527258ee54f8cd4a43d09319aa5448145afc2cb8dArnaldo Carvalho de Melo timeo = sock_sndtimeo(sk, noblock); 7667c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 7677c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* 7687c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * We have to use sk_stream_wait_connect here to set sk_write_pending, 7697c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * so that the trick in dccp_rcv_request_sent_state_process. 7707c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo */ 7717c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* Wait for a connection to finish. */ 772cecd8d0ec4cb4fec728f67163bb0a78f80c292ebGerrit Renker if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN)) 7737c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0) 77427258ee54f8cd4a43d09319aa5448145afc2cb8dArnaldo Carvalho de Melo goto out_release; 7757c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 7767c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo size = sk->sk_prot->max_header + len; 7777c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo release_sock(sk); 7787c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo skb = sock_alloc_send_skb(sk, size, noblock, &rc); 7797c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo lock_sock(sk); 7807c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (skb == NULL) 7817c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out_release; 7827c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 7837c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo skb_reserve(skb, sk->sk_prot->max_header); 7847c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); 78527258ee54f8cd4a43d09319aa5448145afc2cb8dArnaldo Carvalho de Melo if (rc != 0) 78627258ee54f8cd4a43d09319aa5448145afc2cb8dArnaldo Carvalho de Melo goto out_discard; 78727258ee54f8cd4a43d09319aa5448145afc2cb8dArnaldo Carvalho de Melo 788871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny rc = dccp_msghdr_parse(msg, skb); 789871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny if (rc != 0) 790871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny goto out_discard; 791871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny 792871a2c16c21b988688b4ab1a78eadd969765c0a3Tomasz Grobelny dccp_qpolicy_push(sk, skb); 793b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker /* 794b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * The xmit_timer is set if the TX CCID is rate-based and will expire 795b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * when congestion control permits to release further packets into the 796b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * network. Window-based CCIDs do not use this timer. 797b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker */ 798b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker if (!timer_pending(&dp->dccps_xmit_timer)) 799b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker dccp_write_xmit(sk); 8007c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloout_release: 8017c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo release_sock(sk); 8027c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo return rc ? : len; 80327258ee54f8cd4a43d09319aa5448145afc2cb8dArnaldo Carvalho de Meloout_discard: 80427258ee54f8cd4a43d09319aa5448145afc2cb8dArnaldo Carvalho de Melo kfree_skb(skb); 8057c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out_release; 8067c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 8077c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 808f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_sendmsg); 809f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 8107c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloint dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 8117c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo size_t len, int nonblock, int flags, int *addr_len) 8127c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 8137c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo const struct dccp_hdr *dh; 8147c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo long timeo; 8157c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 8167c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo lock_sock(sk); 8177c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 818531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (sk->sk_state == DCCP_LISTEN) { 819531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = -ENOTCONN; 8207c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out; 8217c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 8227c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 823531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo timeo = sock_rcvtimeo(sk, nonblock); 8247c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 8257c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo do { 826531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); 8277c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 828531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (skb == NULL) 829531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo goto verify_sock_status; 8307c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 831531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo dh = dccp_hdr(skb); 8327c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 8330c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker switch (dh->dccph_type) { 8340c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PKT_DATA: 8350c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PKT_DATAACK: 836531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo goto found_ok_skb; 8377c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 8380c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PKT_CLOSE: 8390c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PKT_CLOSEREQ: 8400c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker if (!(flags & MSG_PEEK)) 8410c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_finish_passive_close(sk); 8420c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker /* fall through */ 8430c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PKT_RESET: 8440c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_pr_debug("found fin (%s) ok!\n", 8450c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_packet_name(dh->dccph_type)); 846531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = 0; 847531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo goto found_fin_ok; 8480c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker default: 8490c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_pr_debug("packet_type=%s\n", 8500c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_packet_name(dh->dccph_type)); 8517bced397510ab569d31de4c70b39e13355046387Dan Williams sk_eat_skb(sk, skb); 852531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo } 853531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Meloverify_sock_status: 854531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (sock_flag(sk, SOCK_DONE)) { 855531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = 0; 8567c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo break; 857531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo } 8587c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 859531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (sk->sk_err) { 860531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = sock_error(sk); 861531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo break; 862531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo } 8637c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 864531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (sk->sk_shutdown & RCV_SHUTDOWN) { 865531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = 0; 866531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo break; 867531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo } 8687c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 869531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (sk->sk_state == DCCP_CLOSED) { 870531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (!sock_flag(sk, SOCK_DONE)) { 871531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo /* This occurs when user tries to read 872531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo * from never connected socket. 873531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo */ 874531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = -ENOTCONN; 8757c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo break; 8767c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 877531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = 0; 878531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo break; 8797c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 8807c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 881531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (!timeo) { 882531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = -EAGAIN; 883531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo break; 884531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo } 8857c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 886531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (signal_pending(current)) { 887531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = sock_intr_errno(timeo); 888531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo break; 889531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo } 8907c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 891531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo sk_wait_data(sk, &timeo); 8927c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo continue; 8937c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo found_ok_skb: 894531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (len > skb->len) 895531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = skb->len; 896531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo else if (len < skb->len) 897531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo msg->msg_flags |= MSG_TRUNC; 898531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo 899531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) { 900531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo /* Exception. Bailout! */ 901531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo len = -EFAULT; 902531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo break; 9037c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 90455d955902a7f78e3e7c9ddbc71a4a050d9d44810Gerrit Renker if (flags & MSG_TRUNC) 90555d955902a7f78e3e7c9ddbc71a4a050d9d44810Gerrit Renker len = skb->len; 9067c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo found_fin_ok: 9077c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (!(flags & MSG_PEEK)) 9087bced397510ab569d31de4c70b39e13355046387Dan Williams sk_eat_skb(sk, skb); 9097c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo break; 910531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo } while (1); 9117c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloout: 9127c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo release_sock(sk); 913531669a0a9041d60d13920973ef8aa4f743c14a0Arnaldo Carvalho de Melo return len; 9147c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 9157c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 916f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_recvmsg); 917f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 918f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Meloint inet_dccp_listen(struct socket *sock, int backlog) 9197c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 9207c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo struct sock *sk = sock->sk; 9217c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo unsigned char old_state; 9227c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo int err; 9237c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9247c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo lock_sock(sk); 9257c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9267c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo err = -EINVAL; 9277c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP) 9287c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out; 9297c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9307c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo old_state = sk->sk_state; 9317c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) 9327c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out; 9337c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9347c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* Really, if the socket is already in listen state 9357c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * we can only allow the backlog to be adjusted. 9367c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo */ 9377c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (old_state != DCCP_LISTEN) { 9387c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* 9397c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * FIXME: here it probably should be sk->sk_prot->listen_start 9407c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * see tcp_listen_start 9417c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo */ 94272a3effaf633bcae9034b7e176bdbd78d64a71dbEric Dumazet err = dccp_listen_start(sk, backlog); 9437c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (err) 9447c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out; 9457c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 9467c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk->sk_max_ack_backlog = backlog; 9477c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo err = 0; 9487c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9497c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloout: 9507c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo release_sock(sk); 9517c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo return err; 9527c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 9537c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 954f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(inet_dccp_listen); 955f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 9560c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renkerstatic void dccp_terminate_connection(struct sock *sk) 9577c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 9580c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker u8 next_state = DCCP_CLOSED; 9597c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9600c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker switch (sk->sk_state) { 9610c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PASSIVE_CLOSE: 9620c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PASSIVE_CLOSEREQ: 9630c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_finish_passive_close(sk); 9640c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker break; 9650c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_PARTOPEN: 9660c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_pr_debug("Stop PARTOPEN timer (%p)\n", sk); 9670c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK); 9680c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker /* fall through */ 9690c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker case DCCP_OPEN: 9700c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_send_close(sk, 1); 9717c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 972b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker if (dccp_sk(sk)->dccps_role == DCCP_ROLE_SERVER && 973b8599d20708fa3bde1e414689f3474560c2d990bGerrit Renker !dccp_sk(sk)->dccps_server_timewait) 9740c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker next_state = DCCP_ACTIVE_CLOSEREQ; 9750c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker else 9760c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker next_state = DCCP_CLOSING; 9770c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker /* fall through */ 9780c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker default: 9790c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_set_state(sk, next_state); 9800c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker } 9817c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 9827c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9837c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melovoid dccp_close(struct sock *sk, long timeout) 9847c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 98597e5848dd39e7e76bd6077735ebb5473763ab9c5Ian McDonald struct dccp_sock *dp = dccp_sk(sk); 9867c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo struct sk_buff *skb; 987d83bd95bf11444993b9c405b255ffa644c32d414Gerrit Renker u32 data_was_unread = 0; 988134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu int state; 9897c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9907c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo lock_sock(sk); 9917c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9927c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk->sk_shutdown = SHUTDOWN_MASK; 9937c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9947c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (sk->sk_state == DCCP_LISTEN) { 9957c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo dccp_set_state(sk, DCCP_CLOSED); 9967c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 9977c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* Special case. */ 9987c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo inet_csk_listen_stop(sk); 9997c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 10007c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto adjudge_to_death; 10017c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 10027c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 100397e5848dd39e7e76bd6077735ebb5473763ab9c5Ian McDonald sk_stop_timer(sk, &dp->dccps_xmit_timer); 100497e5848dd39e7e76bd6077735ebb5473763ab9c5Ian McDonald 10057c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* 10067c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * We need to flush the recv. buffs. We do this only on the 10077c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * descriptor close, not protocol-sourced closes, because the 10087c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo *reader process may not have drained the data yet! 10097c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo */ 10107c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { 1011d83bd95bf11444993b9c405b255ffa644c32d414Gerrit Renker data_was_unread += skb->len; 10127c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo __kfree_skb(skb); 10137c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 10147c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1015d83bd95bf11444993b9c405b255ffa644c32d414Gerrit Renker if (data_was_unread) { 1016d83bd95bf11444993b9c405b255ffa644c32d414Gerrit Renker /* Unread data was tossed, send an appropriate Reset Code */ 10172f34b32977ade4249601f35f7eb0cdd56b4e0f89Gerrit Renker DCCP_WARN("ABORT with %u bytes unread\n", data_was_unread); 1018d83bd95bf11444993b9c405b255ffa644c32d414Gerrit Renker dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); 1019d83bd95bf11444993b9c405b255ffa644c32d414Gerrit Renker dccp_set_state(sk, DCCP_CLOSED); 1020d83bd95bf11444993b9c405b255ffa644c32d414Gerrit Renker } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { 10217c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* Check zero linger _after_ checking for unread data. */ 10227c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk->sk_prot->disconnect(sk, 0); 10230c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker } else if (sk->sk_state != DCCP_CLOSED) { 1024b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker /* 1025b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * Normal connection termination. May need to wait if there are 1026b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * still packets in the TX queue that are delayed by the CCID. 1027b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker */ 1028b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker dccp_flush_write_queue(sk, &timeout); 10290c869620762fea4b3acf6502d9e80840b27ec642Gerrit Renker dccp_terminate_connection(sk); 10307c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 10317c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1032b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker /* 1033b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * Flush write queue. This may be necessary in several cases: 1034b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * - we have been closed by the peer but still have application data; 1035b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * - abortive termination (unread data or zero linger time), 1036b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker * - normal termination but queue could not be flushed within time limit 1037b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker */ 1038b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker __skb_queue_purge(&sk->sk_write_queue); 1039b1fcf55eea541af9efa5d39f5a0d1aec8ceca55dGerrit Renker 10407c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sk_stream_wait_close(sk, timeout); 10417c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 10427c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloadjudge_to_death: 1043134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu state = sk->sk_state; 1044134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu sock_hold(sk); 1045134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu sock_orphan(sk); 1046134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu 10477ad07e7cf343181002c10c39d3f57a88e4903d4fArnaldo Carvalho de Melo /* 10487ad07e7cf343181002c10c39d3f57a88e4903d4fArnaldo Carvalho de Melo * It is the last release_sock in its life. It will remove backlog. 10497ad07e7cf343181002c10c39d3f57a88e4903d4fArnaldo Carvalho de Melo */ 10507c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo release_sock(sk); 10517c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* 10527c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * Now socket is owned by kernel and we acquire BH lock 10537c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * to finish close. No need to check for user refs. 10547c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo */ 10557c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo local_bh_disable(); 10567c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo bh_lock_sock(sk); 1057547b792cac0a038b9dbf958d3c120df3740b5572Ilpo Järvinen WARN_ON(sock_owned_by_user(sk)); 10587c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1059eb4dea5853046727bfbb579f0c9a8cae7369f7c6Herbert Xu percpu_counter_inc(sk->sk_prot->orphan_count); 1060eb4dea5853046727bfbb579f0c9a8cae7369f7c6Herbert Xu 1061134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu /* Have we already been destroyed by a softirq or backlog? */ 1062134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu if (state != DCCP_CLOSED && sk->sk_state == DCCP_CLOSED) 1063134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xu goto out; 10647ad07e7cf343181002c10c39d3f57a88e4903d4fArnaldo Carvalho de Melo 10657c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (sk->sk_state == DCCP_CLOSED) 10667c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo inet_csk_destroy_sock(sk); 10677c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 10687c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* Otherwise, socket is reprieved until protocol close. */ 10697c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1070134af34632a7b3b0a98a79a2e56bf9cc927e0eacHerbert Xuout: 10717c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo bh_unlock_sock(sk); 10727c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo local_bh_enable(); 10737c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sock_put(sk); 10747c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 10757c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1076f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_close); 1077f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 10787c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melovoid dccp_shutdown(struct sock *sk, int how) 10797c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 10808e8c71f1ab0ca1c4e74efad14533b991524dcb6cGerrit Renker dccp_pr_debug("called shutdown(%x)\n", how); 10817c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 10827c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1083f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_shutdown); 1084f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 10850c5b8a46294d43fc63788839d3c18de0961ec1bcFabian Frederickstatic inline int __init dccp_mib_init(void) 10867c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 1087698365fa1874aa7635d51667a34a2842228e9837WANG Cong dccp_statistics = alloc_percpu(struct dccp_mib); 1088698365fa1874aa7635d51667a34a2842228e9837WANG Cong if (!dccp_statistics) 1089698365fa1874aa7635d51667a34a2842228e9837WANG Cong return -ENOMEM; 1090698365fa1874aa7635d51667a34a2842228e9837WANG Cong return 0; 10917c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 10927c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 109324e8b7e48471514c9311c733b3f399bd20d014feYOSHIFUJI Hideakistatic inline void dccp_mib_exit(void) 109446f09ffa7db595f49fb42338e013417756816d37Arnaldo Carvalho de Melo{ 1095698365fa1874aa7635d51667a34a2842228e9837WANG Cong free_percpu(dccp_statistics); 109646f09ffa7db595f49fb42338e013417756816d37Arnaldo Carvalho de Melo} 109746f09ffa7db595f49fb42338e013417756816d37Arnaldo Carvalho de Melo 10987c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melostatic int thash_entries; 10997c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melomodule_param(thash_entries, int, 0444); 11007c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de MeloMODULE_PARM_DESC(thash_entries, "Number of ehash buckets"); 11017c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1102a1d3a35518779df0579dd9de0121354b49c68ddcArnaldo Carvalho de Melo#ifdef CONFIG_IP_DCCP_DEBUG 1103eb93992207dadb946a3b5cf4544957dc924a6f58Rusty Russellbool dccp_debug; 1104432649916b0435b608fb3e1fcb97347ac294d38dGerrit Renkermodule_param(dccp_debug, bool, 0644); 11057c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de MeloMODULE_PARM_DESC(dccp_debug, "Enable debug messages"); 1106f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de Melo 1107f21e68caa0ddffddf98a1e729e734a470957b6ecArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(dccp_debug); 1108a1d3a35518779df0579dd9de0121354b49c68ddcArnaldo Carvalho de Melo#endif 11097c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11107c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melostatic int __init dccp_init(void) 11117c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 11127c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo unsigned long goal; 11137c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo int ehash_order, bhash_order, i; 1114dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1Eric Dumazet int rc; 11157c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1116028b027524b162eef90839a92ba4b8bddf23e06cPatrick McHardy BUILD_BUG_ON(sizeof(struct dccp_skb_cb) > 1117028b027524b162eef90839a92ba4b8bddf23e06cPatrick McHardy FIELD_SIZEOF(struct sk_buff, cb)); 1118908c7f1949cb7cc6e92ba8f18f2998e87e265b8eTejun Heo rc = percpu_counter_init(&dccp_orphan_count, 0, GFP_KERNEL); 1119dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1Eric Dumazet if (rc) 1120d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker goto out_fail; 1121dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1Eric Dumazet rc = -ENOBUFS; 11225caea4ea7088e80ac5410d04660346094608b909Eric Dumazet inet_hashinfo_init(&dccp_hashinfo); 11237690af3fff7633e40b1b9950eb8489129251d074Arnaldo Carvalho de Melo dccp_hashinfo.bind_bucket_cachep = 11247690af3fff7633e40b1b9950eb8489129251d074Arnaldo Carvalho de Melo kmem_cache_create("dccp_bind_bucket", 11257690af3fff7633e40b1b9950eb8489129251d074Arnaldo Carvalho de Melo sizeof(struct inet_bind_bucket), 0, 112620c2df83d25c6a95affe6157a4c9cac4cf5ffaacPaul Mundt SLAB_HWCACHE_ALIGN, NULL); 11277c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (!dccp_hashinfo.bind_bucket_cachep) 1128dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1Eric Dumazet goto out_free_percpu; 11297c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11307c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo /* 11317c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * Size and allocate the main established and bind bucket 11327c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * hash tables. 11337c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * 11347c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo * The methodology is similar to that of the buffer cache. 11357c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo */ 11364481374ce88ba8f460c8b89f2572027bd27057d0Jan Beulich if (totalram_pages >= (128 * 1024)) 11374481374ce88ba8f460c8b89f2572027bd27057d0Jan Beulich goal = totalram_pages >> (21 - PAGE_SHIFT); 11387c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo else 11394481374ce88ba8f460c8b89f2572027bd27057d0Jan Beulich goal = totalram_pages >> (23 - PAGE_SHIFT); 11407c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11417c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (thash_entries) 11427690af3fff7633e40b1b9950eb8489129251d074Arnaldo Carvalho de Melo goal = (thash_entries * 11437690af3fff7633e40b1b9950eb8489129251d074Arnaldo Carvalho de Melo sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT; 11447c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) 11457c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo ; 11467c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo do { 1147f373b53b5fe67aa4a6f28f921a529cc90f88e79bEric Dumazet unsigned long hash_size = (1UL << ehash_order) * PAGE_SIZE / 11487c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sizeof(struct inet_ehash_bucket); 1149f373b53b5fe67aa4a6f28f921a529cc90f88e79bEric Dumazet 1150f373b53b5fe67aa4a6f28f921a529cc90f88e79bEric Dumazet while (hash_size & (hash_size - 1)) 1151f373b53b5fe67aa4a6f28f921a529cc90f88e79bEric Dumazet hash_size--; 1152f373b53b5fe67aa4a6f28f921a529cc90f88e79bEric Dumazet dccp_hashinfo.ehash_mask = hash_size - 1; 11537c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo dccp_hashinfo.ehash = (struct inet_ehash_bucket *) 11541c29b3ff4f2d847464f7be3a0e179c6dfc69bd02Mel Gorman __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, ehash_order); 11557c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } while (!dccp_hashinfo.ehash && --ehash_order > 0); 11567c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11577c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (!dccp_hashinfo.ehash) { 115859348b19efebfd6a8d0791ff81d207b16594c94bGerrit Renker DCCP_CRIT("Failed to allocate DCCP established hash table"); 11597c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out_free_bind_bucket_cachep; 11607c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 11617c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 116205dbc7b59481ca891bbcfe6799a562d48159fbf7Eric Dumazet for (i = 0; i <= dccp_hashinfo.ehash_mask; i++) 11633ab5aee7fe840b5b1b35a8d1ac11c3de5281e611Eric Dumazet INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].chain, i); 11647c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 1165230140cffa7feae90ad50bf259db1fa07674f3a7Eric Dumazet if (inet_ehash_locks_alloc(&dccp_hashinfo)) 1166230140cffa7feae90ad50bf259db1fa07674f3a7Eric Dumazet goto out_free_dccp_ehash; 1167230140cffa7feae90ad50bf259db1fa07674f3a7Eric Dumazet 11687c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo bhash_order = ehash_order; 11697c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11707c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo do { 11717c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE / 11727c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo sizeof(struct inet_bind_hashbucket); 11737690af3fff7633e40b1b9950eb8489129251d074Arnaldo Carvalho de Melo if ((dccp_hashinfo.bhash_size > (64 * 1024)) && 11747690af3fff7633e40b1b9950eb8489129251d074Arnaldo Carvalho de Melo bhash_order > 0) 11757c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo continue; 11767c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo dccp_hashinfo.bhash = (struct inet_bind_hashbucket *) 11771c29b3ff4f2d847464f7be3a0e179c6dfc69bd02Mel Gorman __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, bhash_order); 11787c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } while (!dccp_hashinfo.bhash && --bhash_order >= 0); 11797c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11807c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (!dccp_hashinfo.bhash) { 118159348b19efebfd6a8d0791ff81d207b16594c94bGerrit Renker DCCP_CRIT("Failed to allocate DCCP bind hash table"); 1182230140cffa7feae90ad50bf259db1fa07674f3a7Eric Dumazet goto out_free_dccp_locks; 11837c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 11847c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11857c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo for (i = 0; i < dccp_hashinfo.bhash_size; i++) { 11867c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo spin_lock_init(&dccp_hashinfo.bhash[i].lock); 11877c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain); 11887c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo } 11897c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 119046f09ffa7db595f49fb42338e013417756816d37Arnaldo Carvalho de Melo rc = dccp_mib_init(); 1191fa23e2ecd30a584cdcb9b3de0149dbb5c073c20bArnaldo Carvalho de Melo if (rc) 11927c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo goto out_free_dccp_bhash; 11937c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 11949b07ef5ddaced1e822b1a1fb1da088eb15c45cb4Arnaldo Carvalho de Melo rc = dccp_ackvec_init(); 11957c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo if (rc) 1196b61fafc4ef3faf54236d57e3b230ca19167663bfArnaldo Carvalho de Melo goto out_free_dccp_mib; 11979b07ef5ddaced1e822b1a1fb1da088eb15c45cb4Arnaldo Carvalho de Melo 1198e55d912f5b75723159348a7fc7692f869a86636aArnaldo Carvalho de Melo rc = dccp_sysctl_init(); 11999b07ef5ddaced1e822b1a1fb1da088eb15c45cb4Arnaldo Carvalho de Melo if (rc) 12009b07ef5ddaced1e822b1a1fb1da088eb15c45cb4Arnaldo Carvalho de Melo goto out_ackvec_exit; 12014c70f383e0c0273c4092c4efdb414be0966978b7Gerrit Renker 1202ddebc973c56b51b4e5d84d606f0430d81b895d67Gerrit Renker rc = ccid_initialize_builtins(); 1203ddebc973c56b51b4e5d84d606f0430d81b895d67Gerrit Renker if (rc) 1204ddebc973c56b51b4e5d84d606f0430d81b895d67Gerrit Renker goto out_sysctl_exit; 1205ddebc973c56b51b4e5d84d606f0430d81b895d67Gerrit Renker 12064c70f383e0c0273c4092c4efdb414be0966978b7Gerrit Renker dccp_timestamping_init(); 1207d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker 1208d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker return 0; 1209d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker 1210ddebc973c56b51b4e5d84d606f0430d81b895d67Gerrit Renkerout_sysctl_exit: 1211ddebc973c56b51b4e5d84d606f0430d81b895d67Gerrit Renker dccp_sysctl_exit(); 12129b07ef5ddaced1e822b1a1fb1da088eb15c45cb4Arnaldo Carvalho de Meloout_ackvec_exit: 12139b07ef5ddaced1e822b1a1fb1da088eb15c45cb4Arnaldo Carvalho de Melo dccp_ackvec_exit(); 1214b61fafc4ef3faf54236d57e3b230ca19167663bfArnaldo Carvalho de Meloout_free_dccp_mib: 121546f09ffa7db595f49fb42338e013417756816d37Arnaldo Carvalho de Melo dccp_mib_exit(); 12167c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloout_free_dccp_bhash: 12177c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); 1218230140cffa7feae90ad50bf259db1fa07674f3a7Eric Dumazetout_free_dccp_locks: 1219230140cffa7feae90ad50bf259db1fa07674f3a7Eric Dumazet inet_ehash_locks_free(&dccp_hashinfo); 12207c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloout_free_dccp_ehash: 12217c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order); 12227c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Meloout_free_bind_bucket_cachep: 12237c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); 1224dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1Eric Dumazetout_free_percpu: 1225dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1Eric Dumazet percpu_counter_destroy(&dccp_orphan_count); 1226d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renkerout_fail: 1227d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker dccp_hashinfo.bhash = NULL; 1228d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker dccp_hashinfo.ehash = NULL; 1229d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker dccp_hashinfo.bind_bucket_cachep = NULL; 1230d14a0ebda7d3daede1a99c01527affb9ceaa4c22Gerrit Renker return rc; 12317c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 12327c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 12337c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melostatic void __exit dccp_fini(void) 12347c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo{ 1235ddebc973c56b51b4e5d84d606f0430d81b895d67Gerrit Renker ccid_cleanup_builtins(); 123646f09ffa7db595f49fb42338e013417756816d37Arnaldo Carvalho de Melo dccp_mib_exit(); 1237725ba8eee3881e619c8e5a0116f1bdb6480ac2d9Arnaldo Carvalho de Melo free_pages((unsigned long)dccp_hashinfo.bhash, 1238725ba8eee3881e619c8e5a0116f1bdb6480ac2d9Arnaldo Carvalho de Melo get_order(dccp_hashinfo.bhash_size * 1239725ba8eee3881e619c8e5a0116f1bdb6480ac2d9Arnaldo Carvalho de Melo sizeof(struct inet_bind_hashbucket))); 1240725ba8eee3881e619c8e5a0116f1bdb6480ac2d9Arnaldo Carvalho de Melo free_pages((unsigned long)dccp_hashinfo.ehash, 1241f373b53b5fe67aa4a6f28f921a529cc90f88e79bEric Dumazet get_order((dccp_hashinfo.ehash_mask + 1) * 1242725ba8eee3881e619c8e5a0116f1bdb6480ac2d9Arnaldo Carvalho de Melo sizeof(struct inet_ehash_bucket))); 1243230140cffa7feae90ad50bf259db1fa07674f3a7Eric Dumazet inet_ehash_locks_free(&dccp_hashinfo); 12447c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); 12459b07ef5ddaced1e822b1a1fb1da088eb15c45cb4Arnaldo Carvalho de Melo dccp_ackvec_exit(); 1246e55d912f5b75723159348a7fc7692f869a86636aArnaldo Carvalho de Melo dccp_sysctl_exit(); 1247476181cb05c6a3aea3ef42309388e255c934a06fWei Yongjun percpu_counter_destroy(&dccp_orphan_count); 12487c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo} 12497c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 12507c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melomodule_init(dccp_init); 12517c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melomodule_exit(dccp_fini); 12527c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de Melo 12537c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de MeloMODULE_LICENSE("GPL"); 12547c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de MeloMODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>"); 12557c657876b63cb1d8a2ec06f8fc6c37bb8412e66cArnaldo Carvalho de MeloMODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); 1256