inet6_connection_sock.c revision b67bfe0d42cac56c512dd5da4b1b347a23f4b70a
18129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo/* 28129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * INET An implementation of the TCP/IP protocol suite for the LINUX 38129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * operating system. INET is implemented using the BSD Socket 48129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * interface as the means of communication with the user level. 58129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * 68129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * Support for INET6 connection oriented protocols. 78129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * 88129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * Authors: See the TCPv6 sources 98129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * 108129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * This program is free software; you can redistribute it and/or 118129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * modify it under the terms of the GNU General Public License 128129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * as published by the Free Software Foundation; either version 138129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * 2 of the License, or(at your option) any later version. 148129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo */ 158129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 168129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo#include <linux/module.h> 178129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo#include <linux/in6.h> 188129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo#include <linux/ipv6.h> 198129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo#include <linux/jhash.h> 205a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 218129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 228129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo#include <net/addrconf.h> 238129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo#include <net/inet_connection_sock.h> 24b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo#include <net/inet_ecn.h> 25b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo#include <net/inet_hashtables.h> 26b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo#include <net/ip6_route.h> 278129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo#include <net/sock.h> 289f5336e21893fafd232a9a02cfa7588ad153889aAdrian Bunk#include <net/inet6_connection_sock.h> 298129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 30b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Meloint inet6_csk_bind_conflict(const struct sock *sk, 31aacd9289af8b82f5fb01bcdd53d0e3406d1333c7Alex Copot const struct inet_bind_bucket *tb, bool relax) 32b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo{ 33b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo const struct sock *sk2; 345ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert int reuse = sk->sk_reuse; 355ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert int reuseport = sk->sk_reuseport; 36243bb4c6d731f886ac7a99b986e46625f0d5ba07Eric W. Biederman kuid_t uid = sock_i_uid((struct sock *)sk); 37b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 38b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo /* We must walk the whole port owner list in this case. -DaveM */ 397477fd2e6b676fcd15861c2a96a7172f71afe0a5Pavel Emelyanov /* 407477fd2e6b676fcd15861c2a96a7172f71afe0a5Pavel Emelyanov * See comment in inet_csk_bind_conflict about sock lookup 417477fd2e6b676fcd15861c2a96a7172f71afe0a5Pavel Emelyanov * vs net namespaces issues. 427477fd2e6b676fcd15861c2a96a7172f71afe0a5Pavel Emelyanov */ 43b67bfe0d42cac56c512dd5da4b1b347a23f4b70aSasha Levin sk_for_each_bound(sk2, &tb->owners) { 44b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo if (sk != sk2 && 45b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo (!sk->sk_bound_dev_if || 46b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo !sk2->sk_bound_dev_if || 475ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) { 485ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert if ((!reuse || !sk2->sk_reuse || 495ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert sk2->sk_state == TCP_LISTEN) && 505ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert (!reuseport || !sk2->sk_reuseport || 515ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert (sk2->sk_state != TCP_TIME_WAIT && 525ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert !uid_eq(uid, 535ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert sock_i_uid((struct sock *)sk2))))) { 545ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert if (ipv6_rcv_saddr_equal(sk, sk2)) 555ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert break; 565ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert } 575ba24953e9707387cce87b07f0d5fbdd03c5c11bTom Herbert } 58b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo } 59b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 60b67bfe0d42cac56c512dd5da4b1b347a23f4b70aSasha Levin return sk2 != NULL; 61b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo} 62b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 63b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(inet6_csk_bind_conflict); 64b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 65ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Millerstruct dst_entry *inet6_csk_route_req(struct sock *sk, 663840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell struct flowi6 *fl6, 67ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller const struct request_sock *req) 68ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller{ 69ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller struct inet6_request_sock *treq = inet6_rsk(req); 70ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 71ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller struct in6_addr *final_p, final; 72ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller struct dst_entry *dst; 734c9483b2fb5d2548c3cc1fe03cdd4484ceeb5d1cDavid S. Miller 743840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell memset(fl6, 0, sizeof(*fl6)); 753840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell fl6->flowi6_proto = IPPROTO_TCP; 763840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell fl6->daddr = treq->rmt_addr; 773840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell final_p = fl6_update_dst(fl6, np->opt, &final); 783840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell fl6->saddr = treq->loc_addr; 793840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell fl6->flowi6_oif = treq->iif; 803840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell fl6->flowi6_mark = sk->sk_mark; 813840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell fl6->fl6_dport = inet_rsk(req)->rmt_port; 823840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell fl6->fl6_sport = inet_rsk(req)->loc_port; 833840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell security_req_classify_flow(req, flowi6_to_flowi(fl6)); 844c9483b2fb5d2548c3cc1fe03cdd4484ceeb5d1cDavid S. Miller 853840a06e6046aaee95f33a120499d2dc8c054b9dNeal Cardwell dst = ip6_dst_lookup_flow(sk, fl6, final_p, false); 8668d0c6d34d586a893292d4fb633a3bf8c547b222David S. Miller if (IS_ERR(dst)) 87ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller return NULL; 88ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller 89ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller return dst; 90ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller} 91ae4694b2d3e4c0f47c0e804a68417be57e5daf85David S. Miller 928129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo/* 938129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo * request_sock (formerly open request) hash tables. 948129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo */ 95fede70b9862635ab1bed84ab3d765e9069616b02Al Virostatic u32 inet6_synq_hash(const struct in6_addr *raddr, const __be16 rport, 96c16a98ed91597b40b22b540c6517103497ef8e74Eric Dumazet const u32 rnd, const u32 synq_hsize) 978129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo{ 9882a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik u32 c; 998129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 10082a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik c = jhash_3words((__force u32)raddr->s6_addr32[0], 10182a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik (__force u32)raddr->s6_addr32[1], 10282a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik (__force u32)raddr->s6_addr32[2], 10382a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik rnd); 1048129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 10582a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik c = jhash_2words((__force u32)raddr->s6_addr32[3], 10682a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik (__force u32)rport, 10782a39eb6b3829a02e235656feddb4542517fcabcJozsef Kadlecsik c); 1088129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1098129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo return c & (synq_hsize - 1); 1108129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo} 1118129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1128129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melostruct request_sock *inet6_csk_search_req(const struct sock *sk, 1138129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo struct request_sock ***prevp, 114fede70b9862635ab1bed84ab3d765e9069616b02Al Viro const __be16 rport, 1158129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo const struct in6_addr *raddr, 1168129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo const struct in6_addr *laddr, 1178129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo const int iif) 1188129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo{ 1198129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo const struct inet_connection_sock *icsk = inet_csk(sk); 1208129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt; 1218129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo struct request_sock *req, **prev; 1228129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1238129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo for (prev = &lopt->syn_table[inet6_synq_hash(raddr, rport, 1248129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo lopt->hash_rnd, 1258129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo lopt->nr_table_entries)]; 1268129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo (req = *prev) != NULL; 1278129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo prev = &req->dl_next) { 128ca304b6104ffdd120bb6687a88a0625e58bc71cdArnaldo Carvalho de Melo const struct inet6_request_sock *treq = inet6_rsk(req); 1298129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1308129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo if (inet_rsk(req)->rmt_port == rport && 1318129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo req->rsk_ops->family == AF_INET6 && 1328129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo ipv6_addr_equal(&treq->rmt_addr, raddr) && 1338129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo ipv6_addr_equal(&treq->loc_addr, laddr) && 1348129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo (!treq->iif || treq->iif == iif)) { 135547b792cac0a038b9dbf958d3c120df3740b5572Ilpo Järvinen WARN_ON(req->sk != NULL); 1368129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo *prevp = prev; 1378129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo return req; 1388129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo } 1398129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo } 1408129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1418129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo return NULL; 1428129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo} 1438129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1448129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(inet6_csk_search_req); 1458129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1468129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melovoid inet6_csk_reqsk_queue_hash_add(struct sock *sk, 1478129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo struct request_sock *req, 1488129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo const unsigned long timeout) 1498129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo{ 1508129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1518129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt; 152ca304b6104ffdd120bb6687a88a0625e58bc71cdArnaldo Carvalho de Melo const u32 h = inet6_synq_hash(&inet6_rsk(req)->rmt_addr, 1538129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo inet_rsk(req)->rmt_port, 1548129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo lopt->hash_rnd, lopt->nr_table_entries); 1558129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1568129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo reqsk_queue_hash_req(&icsk->icsk_accept_queue, h, req, timeout); 1578129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo inet_csk_reqsk_queue_added(sk, timeout); 1588129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo} 1598129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de Melo 1608129765ac07c2455c927051e3a8b048b619b56eeArnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(inet6_csk_reqsk_queue_hash_add); 161b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 162b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melovoid inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr) 163b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo{ 164b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo struct ipv6_pinfo *np = inet6_sk(sk); 165b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) uaddr; 166b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 167b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo sin6->sin6_family = AF_INET6; 1684e3fd7a06dc20b2d8ec6892233ad2012968fe7b6Alexey Dobriyan sin6->sin6_addr = np->daddr; 169c720c7e8383aff1cb219bddf474ed89d850336e3Eric Dumazet sin6->sin6_port = inet_sk(sk)->inet_dport; 170b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo /* We do not store received flowlabel for TCP */ 171b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo sin6->sin6_flowinfo = 0; 172b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo sin6->sin6_scope_id = 0; 173b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo if (sk->sk_bound_dev_if && 174b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 175b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo sin6->sin6_scope_id = sk->sk_bound_dev_if; 176b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo} 177b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 178b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(inet6_csk_addr2sockaddr); 179b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 180a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYAstatic inline 181a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYAvoid __inet6_csk_dst_store(struct sock *sk, struct dst_entry *dst, 182d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet const struct in6_addr *daddr, 183d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet const struct in6_addr *saddr) 184a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA{ 185a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA __ip6_dst_store(sk, dst, daddr, saddr); 186a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA} 187a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA 188a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYAstatic inline 189a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYAstruct dst_entry *__inet6_csk_dst_check(struct sock *sk, u32 cookie) 190a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA{ 1916f3118b571b8a4c06c7985dc3172c3526cb86253Nicolas Dichtel return __sk_dst_check(sk, cookie); 192a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA} 193a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA 194d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazetstatic struct dst_entry *inet6_csk_route_socket(struct sock *sk, 195d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet struct flowi6 *fl6) 196b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo{ 197b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 198b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo struct ipv6_pinfo *np = inet6_sk(sk); 19920c59de2e6b6bc74bbf714dcd4e720afe8d516cfArnaud Ebalard struct in6_addr *final_p, final; 20035ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller struct dst_entry *dst; 201b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 202d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet memset(fl6, 0, sizeof(*fl6)); 203d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->flowi6_proto = sk->sk_protocol; 204d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->daddr = np->daddr; 205d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->saddr = np->saddr; 206d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->flowlabel = np->flow_label; 207d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet IP6_ECN_flow_xmit(sk, fl6->flowlabel); 208d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->flowi6_oif = sk->sk_bound_dev_if; 209d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->flowi6_mark = sk->sk_mark; 210d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->fl6_sport = inet->inet_sport; 211d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet fl6->fl6_dport = inet->inet_dport; 212d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet security_sk_classify_flow(sk, flowi6_to_flowi(fl6)); 213b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 214d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet final_p = fl6_update_dst(fl6, np->opt, &final); 215b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 216a47ed4cd8cb0709723392f5b841e9015f765d0a6Noriaki TAKAMIYA dst = __inet6_csk_dst_check(sk, np->dst_cookie); 21735ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller if (!dst) { 218d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet dst = ip6_dst_lookup_flow(sk, fl6, final_p, false); 219b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 22035ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller if (!IS_ERR(dst)) 22135ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller __inet6_csk_dst_store(sk, dst, NULL, NULL); 22235ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller } 22335ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller return dst; 22435ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller} 225b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 22635ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Millerint inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused) 22735ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller{ 22835ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller struct sock *sk = skb->sk; 22935ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller struct ipv6_pinfo *np = inet6_sk(sk); 23035ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller struct flowi6 fl6; 23135ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller struct dst_entry *dst; 23235ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller int res; 23335ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller 234d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet dst = inet6_csk_route_socket(sk, &fl6); 23535ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller if (IS_ERR(dst)) { 23635ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller sk->sk_err_soft = -PTR_ERR(dst); 23735ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller sk->sk_route_caps = 0; 23835ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller kfree_skb(skb); 23935ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller return PTR_ERR(dst); 240b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo } 241b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 242d14730b8e9117c9b77aacd391c049b50163e9b61Eric Dumazet rcu_read_lock(); 243d14730b8e9117c9b77aacd391c049b50163e9b61Eric Dumazet skb_dst_set_noref(skb, dst); 244b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 245b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo /* Restore final destination back after routing done */ 2464e3fd7a06dc20b2d8ec6892233ad2012968fe7b6Alexey Dobriyan fl6.daddr = np->daddr; 247b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo 248b903d324bee2627036d024dceed73b3c96558795Eric Dumazet res = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass); 249d14730b8e9117c9b77aacd391c049b50163e9b61Eric Dumazet rcu_read_unlock(); 250d14730b8e9117c9b77aacd391c049b50163e9b61Eric Dumazet return res; 251b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de Melo} 252b9750ce13c08aa8a71a9b138d741f3046aefd991Arnaldo Carvalho de MeloEXPORT_SYMBOL_GPL(inet6_csk_xmit); 25335ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller 25435ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Millerstruct dst_entry *inet6_csk_update_pmtu(struct sock *sk, u32 mtu) 25535ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller{ 256d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet struct flowi6 fl6; 257d3818c92afabecfe6b8e5d2e3734c8753522987cEric Dumazet struct dst_entry *dst = inet6_csk_route_socket(sk, &fl6); 25835ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller 25935ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller if (IS_ERR(dst)) 26035ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller return NULL; 2616700c2709c08d74ae2c3c29b84a30da012dbc7f1David S. Miller dst->ops->update_pmtu(dst, sk, NULL, mtu); 26235ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller 263b4dd006760d671337b62532277b0296bcee8dfd4Eric Dumazet dst = inet6_csk_route_socket(sk, &fl6); 264b4dd006760d671337b62532277b0296bcee8dfd4Eric Dumazet return IS_ERR(dst) ? NULL : dst; 26535ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. Miller} 26635ad9b9cf7d8a2e6259a0d24022e910adb6f3489David S. MillerEXPORT_SYMBOL_GPL(inet6_csk_update_pmtu); 267