147505b8bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 260c778b2SVlad Yasevich /* SCTP kernel implementation 31da177e4SLinus Torvalds * (C) Copyright IBM Corp. 2002, 2004 41da177e4SLinus Torvalds * Copyright (c) 2001 Nokia, Inc. 51da177e4SLinus Torvalds * Copyright (c) 2001 La Monte H.P. Yarroll 61da177e4SLinus Torvalds * Copyright (c) 2002-2003 Intel Corp. 71da177e4SLinus Torvalds * 860c778b2SVlad Yasevich * This file is part of the SCTP kernel implementation 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * SCTP over IPv6. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Please send any bug reports or fixes you make to the 131da177e4SLinus Torvalds * email address(es): 1491705c61SDaniel Borkmann * lksctp developers <linux-sctp@vger.kernel.org> 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * Written or modified by: 171da177e4SLinus Torvalds * Le Yanqun <yanqun.le@nokia.com> 181da177e4SLinus Torvalds * Hui Huang <hui.huang@nokia.com> 191da177e4SLinus Torvalds * La Monte H.P. Yarroll <piggy@acm.org> 201da177e4SLinus Torvalds * Sridhar Samudrala <sri@us.ibm.com> 211da177e4SLinus Torvalds * Jon Grimm <jgrimm@us.ibm.com> 221da177e4SLinus Torvalds * Ardelle Fan <ardelle.fan@intel.com> 231da177e4SLinus Torvalds * 241da177e4SLinus Torvalds * Based on: 251da177e4SLinus Torvalds * linux/net/ipv6/tcp_ipv6.c 261da177e4SLinus Torvalds */ 271da177e4SLinus Torvalds 28145ce502SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 29145ce502SJoe Perches 301da177e4SLinus Torvalds #include <linux/module.h> 311da177e4SLinus Torvalds #include <linux/errno.h> 321da177e4SLinus Torvalds #include <linux/types.h> 331da177e4SLinus Torvalds #include <linux/socket.h> 341da177e4SLinus Torvalds #include <linux/sockios.h> 351da177e4SLinus Torvalds #include <linux/net.h> 361da177e4SLinus Torvalds #include <linux/in.h> 371da177e4SLinus Torvalds #include <linux/in6.h> 381da177e4SLinus Torvalds #include <linux/netdevice.h> 391da177e4SLinus Torvalds #include <linux/init.h> 401da177e4SLinus Torvalds #include <linux/ipsec.h> 415a0e3ad6STejun Heo #include <linux/slab.h> 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #include <linux/ipv6.h> 441da177e4SLinus Torvalds #include <linux/icmpv6.h> 451da177e4SLinus Torvalds #include <linux/random.h> 461da177e4SLinus Torvalds #include <linux/seq_file.h> 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds #include <net/protocol.h> 491da177e4SLinus Torvalds #include <net/ndisc.h> 50c752f073SArnaldo Carvalho de Melo #include <net/ip.h> 511da177e4SLinus Torvalds #include <net/ipv6.h> 521da177e4SLinus Torvalds #include <net/transp_v6.h> 531da177e4SLinus Torvalds #include <net/addrconf.h> 541da177e4SLinus Torvalds #include <net/ip6_route.h> 551da177e4SLinus Torvalds #include <net/inet_common.h> 561da177e4SLinus Torvalds #include <net/inet_ecn.h> 571da177e4SLinus Torvalds #include <net/sctp/sctp.h> 581da177e4SLinus Torvalds 597c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 601da177e4SLinus Torvalds 6162503411SWeixing Shi static inline int sctp_v6_addr_match_len(union sctp_addr *s1, 6262503411SWeixing Shi union sctp_addr *s2); 639914ae3cSVlad Yasevich static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, 649914ae3cSVlad Yasevich __be16 port); 659914ae3cSVlad Yasevich static int sctp_v6_cmp_addr(const union sctp_addr *addr1, 669914ae3cSVlad Yasevich const union sctp_addr *addr2); 6762503411SWeixing Shi 6829303547SVlad Yasevich /* Event handler for inet6 address addition/deletion events. 6929303547SVlad Yasevich * The sctp_local_addr_list needs to be protocted by a spin lock since 7029303547SVlad Yasevich * multiple notifiers (say IPv4 and IPv6) may be running at the same 7129303547SVlad Yasevich * time and thus corrupt the list. 7229303547SVlad Yasevich * The reader side is protected with RCU. 7329303547SVlad Yasevich */ 7424123186SAdrian Bunk static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, 7529c7cf96SSridhar Samudrala void *ptr) 7629c7cf96SSridhar Samudrala { 7729c7cf96SSridhar Samudrala struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 7829303547SVlad Yasevich struct sctp_sockaddr_entry *addr = NULL; 7929303547SVlad Yasevich struct sctp_sockaddr_entry *temp; 804db67e80SEric W. Biederman struct net *net = dev_net(ifa->idev->dev); 8122626216SChidambar 'ilLogict' Zinnoury int found = 0; 8229c7cf96SSridhar Samudrala 8329c7cf96SSridhar Samudrala switch (ev) { 8429c7cf96SSridhar Samudrala case NETDEV_UP: 85400b8b9aSXin Long addr = kzalloc(sizeof(*addr), GFP_ATOMIC); 8629c7cf96SSridhar Samudrala if (addr) { 8729c7cf96SSridhar Samudrala addr->a.v6.sin6_family = AF_INET6; 884e3fd7a0SAlexey Dobriyan addr->a.v6.sin6_addr = ifa->addr; 8929c7cf96SSridhar Samudrala addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; 9029303547SVlad Yasevich addr->valid = 1; 914db67e80SEric W. Biederman spin_lock_bh(&net->sctp.local_addr_lock); 924db67e80SEric W. Biederman list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list); 934db67e80SEric W. Biederman sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW); 944db67e80SEric W. Biederman spin_unlock_bh(&net->sctp.local_addr_lock); 9529c7cf96SSridhar Samudrala } 9629c7cf96SSridhar Samudrala break; 9729c7cf96SSridhar Samudrala case NETDEV_DOWN: 984db67e80SEric W. Biederman spin_lock_bh(&net->sctp.local_addr_lock); 9929303547SVlad Yasevich list_for_each_entry_safe(addr, temp, 1004db67e80SEric W. Biederman &net->sctp.local_addr_list, list) { 101a40a7d15SPavel Emelyanov if (addr->a.sa.sa_family == AF_INET6 && 102a40a7d15SPavel Emelyanov ipv6_addr_equal(&addr->a.v6.sin6_addr, 10329303547SVlad Yasevich &ifa->addr)) { 1044db67e80SEric W. Biederman sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL); 10522626216SChidambar 'ilLogict' Zinnoury found = 1; 10629303547SVlad Yasevich addr->valid = 0; 10729303547SVlad Yasevich list_del_rcu(&addr->list); 10829c7cf96SSridhar Samudrala break; 10929c7cf96SSridhar Samudrala } 11029c7cf96SSridhar Samudrala } 1114db67e80SEric W. Biederman spin_unlock_bh(&net->sctp.local_addr_lock); 11222626216SChidambar 'ilLogict' Zinnoury if (found) 1131231f0baSLai Jiangshan kfree_rcu(addr, rcu); 11429c7cf96SSridhar Samudrala break; 11529c7cf96SSridhar Samudrala } 11629c7cf96SSridhar Samudrala 11729c7cf96SSridhar Samudrala return NOTIFY_DONE; 11829c7cf96SSridhar Samudrala } 11929c7cf96SSridhar Samudrala 1201da177e4SLinus Torvalds static struct notifier_block sctp_inet6addr_notifier = { 12129c7cf96SSridhar Samudrala .notifier_call = sctp_inet6addr_event, 1221da177e4SLinus Torvalds }; 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds /* ICMP error handler. */ 12532bbd879SStefano Brivio static int sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 126d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info) 1271da177e4SLinus Torvalds { 1281da177e4SLinus Torvalds struct inet6_dev *idev; 1291da177e4SLinus Torvalds struct sock *sk; 1301da177e4SLinus Torvalds struct sctp_association *asoc; 1311da177e4SLinus Torvalds struct sctp_transport *transport; 1321da177e4SLinus Torvalds struct ipv6_pinfo *np; 1332c928e0eSSimon Horman __u16 saveip, savesctp; 13432bbd879SStefano Brivio int err, ret = 0; 1354110cc25SEric W. Biederman struct net *net = dev_net(skb->dev); 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds idev = in6_dev_get(skb->dev); 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds /* Fix up skb to look at the embedded net header. */ 140b0e380b1SArnaldo Carvalho de Melo saveip = skb->network_header; 141b0e380b1SArnaldo Carvalho de Melo savesctp = skb->transport_header; 1421ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 143a27ef749SArnaldo Carvalho de Melo skb_set_transport_header(skb, offset); 1444110cc25SEric W. Biederman sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); 1451da177e4SLinus Torvalds /* Put back, the original pointers. */ 146b0e380b1SArnaldo Carvalho de Melo skb->network_header = saveip; 147b0e380b1SArnaldo Carvalho de Melo skb->transport_header = savesctp; 1481da177e4SLinus Torvalds if (!sk) { 149a16292a0SEric Dumazet __ICMP6_INC_STATS(net, idev, ICMP6_MIB_INERRORS); 15032bbd879SStefano Brivio ret = -ENOENT; 1511da177e4SLinus Torvalds goto out; 1521da177e4SLinus Torvalds } 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds /* Warning: The sock lock is held. Remember to call 1551da177e4SLinus Torvalds * sctp_err_finish! 1561da177e4SLinus Torvalds */ 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds switch (type) { 1591da177e4SLinus Torvalds case ICMPV6_PKT_TOOBIG: 160790e38bcSHannes Frederic Sowa if (ip6_sk_accept_pmtu(sk)) 1611da177e4SLinus Torvalds sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); 1621da177e4SLinus Torvalds goto out_unlock; 1631da177e4SLinus Torvalds case ICMPV6_PARAMPROB: 1641da177e4SLinus Torvalds if (ICMPV6_UNK_NEXTHDR == code) { 165d1ad1ff2SSridhar Samudrala sctp_icmp_proto_unreachable(sk, asoc, transport); 1661da177e4SLinus Torvalds goto out_unlock; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds break; 169ec18d9a2SDavid S. Miller case NDISC_REDIRECT: 170ec18d9a2SDavid S. Miller sctp_icmp_redirect(sk, transport, skb); 1713f96a532SDaniel Borkmann goto out_unlock; 1721da177e4SLinus Torvalds default: 1731da177e4SLinus Torvalds break; 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds np = inet6_sk(sk); 1771da177e4SLinus Torvalds icmpv6_err_convert(type, code, &err); 1781da177e4SLinus Torvalds if (!sock_owned_by_user(sk) && np->recverr) { 1791da177e4SLinus Torvalds sk->sk_err = err; 1801da177e4SLinus Torvalds sk->sk_error_report(sk); 1811da177e4SLinus Torvalds } else { /* Only an error on timeout */ 1821da177e4SLinus Torvalds sk->sk_err_soft = err; 1831da177e4SLinus Torvalds } 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds out_unlock: 186dae399d7SXin Long sctp_err_finish(sk, transport); 1871da177e4SLinus Torvalds out: 1881da177e4SLinus Torvalds if (likely(idev != NULL)) 1891da177e4SLinus Torvalds in6_dev_put(idev); 19032bbd879SStefano Brivio 19132bbd879SStefano Brivio return ret; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 194f880374cSHerbert Xu static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds struct sock *sk = skb->sk; 1971da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 19895ee6208SDaniel Borkmann struct flowi6 *fl6 = &transport->fl.u.ip6; 1998a9c58d2SXin Long __u8 tclass = np->tclass; 200c836a8baSEric Dumazet int res; 2011da177e4SLinus Torvalds 202bb33381dSDaniel Borkmann pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb, 20395ee6208SDaniel Borkmann skb->len, &fl6->saddr, &fl6->daddr); 2041da177e4SLinus Torvalds 2058a9c58d2SXin Long if (transport->dscp & SCTP_DSCP_SET_MASK) 2068a9c58d2SXin Long tclass = transport->dscp & SCTP_DSCP_VAL_MASK; 2078a9c58d2SXin Long 2088a9c58d2SXin Long if (INET_ECN_is_capable(tclass)) 20995ee6208SDaniel Borkmann IP6_ECN_flow_xmit(sk, fl6->flowlabel); 2101da177e4SLinus Torvalds 211f880374cSHerbert Xu if (!(transport->param_flags & SPP_PMTUD_ENABLE)) 21260ff7467SWANG Cong skb->ignore_df = 1; 213f880374cSHerbert Xu 21495ee6208SDaniel Borkmann SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS); 21595ee6208SDaniel Borkmann 216c836a8baSEric Dumazet rcu_read_lock(); 21792e55f41SPablo Neira res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt), 2184f6570d7SEric Dumazet tclass, sk->sk_priority); 219c836a8baSEric Dumazet rcu_read_unlock(); 220c836a8baSEric Dumazet return res; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds /* Returns the dst cache entry for the given source and destination ip 2241da177e4SLinus Torvalds * addresses. 2251da177e4SLinus Torvalds */ 226da0420beSVlad Yasevich static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, 227da0420beSVlad Yasevich struct flowi *fl, struct sock *sk) 2281da177e4SLinus Torvalds { 229da0420beSVlad Yasevich struct sctp_association *asoc = t->asoc; 23062503411SWeixing Shi struct dst_entry *dst = NULL; 231582eea23SMarcelo Ricardo Leitner struct flowi _fl; 232582eea23SMarcelo Ricardo Leitner struct flowi6 *fl6 = &_fl.u.ip6; 23362503411SWeixing Shi struct sctp_bind_addr *bp; 23495ee6208SDaniel Borkmann struct ipv6_pinfo *np = inet6_sk(sk); 23562503411SWeixing Shi struct sctp_sockaddr_entry *laddr; 236da0420beSVlad Yasevich union sctp_addr *daddr = &t->ipaddr; 2379914ae3cSVlad Yasevich union sctp_addr dst_saddr; 23895ee6208SDaniel Borkmann struct in6_addr *final_p, final; 2391c662018SXin Long enum sctp_scope scope; 24062503411SWeixing Shi __u8 matchlen = 0; 2411da177e4SLinus Torvalds 242582eea23SMarcelo Ricardo Leitner memset(&_fl, 0, sizeof(_fl)); 2434e3fd7a0SAlexey Dobriyan fl6->daddr = daddr->v6.sin6_addr; 2449c6a02f4SVlad Yasevich fl6->fl6_dport = daddr->v6.sin6_port; 2459c6a02f4SVlad Yasevich fl6->flowi6_proto = IPPROTO_SCTP; 2461da177e4SLinus Torvalds if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 2479914ae3cSVlad Yasevich fl6->flowi6_oif = daddr->v6.sin6_scope_id; 24825e7f2deSZheng Li else if (asoc) 24925e7f2deSZheng Li fl6->flowi6_oif = asoc->base.sk->sk_bound_dev_if; 2508a9c58d2SXin Long if (t->flowlabel & SCTP_FLOWLABEL_SET_MASK) 2518a9c58d2SXin Long fl6->flowlabel = htonl(t->flowlabel & SCTP_FLOWLABEL_VAL_MASK); 2521da177e4SLinus Torvalds 2530999f021SXin Long if (np->sndflow && (fl6->flowlabel & IPV6_FLOWLABEL_MASK)) { 2540999f021SXin Long struct ip6_flowlabel *flowlabel; 2550999f021SXin Long 2560999f021SXin Long flowlabel = fl6_sock_lookup(sk, fl6->flowlabel); 25759c820b2SWillem de Bruijn if (IS_ERR(flowlabel)) 2580999f021SXin Long goto out; 2590999f021SXin Long fl6_sock_release(flowlabel); 2600999f021SXin Long } 2610999f021SXin Long 262bb33381dSDaniel Borkmann pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr); 2631da177e4SLinus Torvalds 2649c6a02f4SVlad Yasevich if (asoc) 2659c6a02f4SVlad Yasevich fl6->fl6_sport = htons(asoc->base.bind_addr.port); 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds if (saddr) { 2684e3fd7a0SAlexey Dobriyan fl6->saddr = saddr->v6.sin6_addr; 269ecf938feSXin Long if (!fl6->fl6_sport) 2709c6a02f4SVlad Yasevich fl6->fl6_sport = saddr->v6.sin6_port; 271bb33381dSDaniel Borkmann 272bb33381dSDaniel Borkmann pr_debug("src=%pI6 - ", &fl6->saddr); 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 275c836a8baSEric Dumazet rcu_read_lock(); 276c836a8baSEric Dumazet final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); 277c836a8baSEric Dumazet rcu_read_unlock(); 278c836a8baSEric Dumazet 279c4e85f73SSabrina Dubroca dst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p); 280582eea23SMarcelo Ricardo Leitner if (!asoc || saddr) { 281582eea23SMarcelo Ricardo Leitner t->dst = dst; 282582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 28362503411SWeixing Shi goto out; 284582eea23SMarcelo Ricardo Leitner } 28562503411SWeixing Shi 28662503411SWeixing Shi bp = &asoc->base.bind_addr; 28762503411SWeixing Shi scope = sctp_scope(daddr); 2889914ae3cSVlad Yasevich /* ip6_dst_lookup has filled in the fl6->saddr for us. Check 2899914ae3cSVlad Yasevich * to see if we can use it. 2909914ae3cSVlad Yasevich */ 2919c6a02f4SVlad Yasevich if (!IS_ERR(dst)) { 2929914ae3cSVlad Yasevich /* Walk through the bind address list and look for a bind 2939914ae3cSVlad Yasevich * address that matches the source address of the returned dst. 2949914ae3cSVlad Yasevich */ 2959914ae3cSVlad Yasevich sctp_v6_to_addr(&dst_saddr, &fl6->saddr, htons(bp->port)); 2969914ae3cSVlad Yasevich rcu_read_lock(); 2979914ae3cSVlad Yasevich list_for_each_entry_rcu(laddr, &bp->address_list, list) { 298fecda034SDaniel Borkmann if (!laddr->valid || laddr->state == SCTP_ADDR_DEL || 299fecda034SDaniel Borkmann (laddr->state != SCTP_ADDR_SRC && 300fecda034SDaniel Borkmann !asoc->src_out_of_asoc_ok)) 3019914ae3cSVlad Yasevich continue; 3029914ae3cSVlad Yasevich 3039914ae3cSVlad Yasevich /* Do not compare against v4 addrs */ 3049914ae3cSVlad Yasevich if ((laddr->a.sa.sa_family == AF_INET6) && 3059914ae3cSVlad Yasevich (sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) { 3069914ae3cSVlad Yasevich rcu_read_unlock(); 307582eea23SMarcelo Ricardo Leitner t->dst = dst; 308582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 3099914ae3cSVlad Yasevich goto out; 3109914ae3cSVlad Yasevich } 3119914ae3cSVlad Yasevich } 3129914ae3cSVlad Yasevich rcu_read_unlock(); 3139914ae3cSVlad Yasevich /* None of the bound addresses match the source address of the 3149914ae3cSVlad Yasevich * dst. So release it. 3159914ae3cSVlad Yasevich */ 3169914ae3cSVlad Yasevich dst_release(dst); 3179914ae3cSVlad Yasevich dst = NULL; 3189914ae3cSVlad Yasevich } 3199914ae3cSVlad Yasevich 3209914ae3cSVlad Yasevich /* Walk through the bind address list and try to get the 3219914ae3cSVlad Yasevich * best source address for a given destination. 32262503411SWeixing Shi */ 32362503411SWeixing Shi rcu_read_lock(); 32462503411SWeixing Shi list_for_each_entry_rcu(laddr, &bp->address_list, list) { 325dbc2b5e9SXin Long struct dst_entry *bdst; 326dbc2b5e9SXin Long __u8 bmatchlen; 327dbc2b5e9SXin Long 328dbc2b5e9SXin Long if (!laddr->valid || 329dbc2b5e9SXin Long laddr->state != SCTP_ADDR_SRC || 330dbc2b5e9SXin Long laddr->a.sa.sa_family != AF_INET6 || 331dbc2b5e9SXin Long scope > sctp_scope(&laddr->a)) 33262503411SWeixing Shi continue; 333dbc2b5e9SXin Long 334dbc2b5e9SXin Long fl6->saddr = laddr->a.v6.sin6_addr; 335dbc2b5e9SXin Long fl6->fl6_sport = laddr->a.v6.sin6_port; 336c836a8baSEric Dumazet final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); 337c4e85f73SSabrina Dubroca bdst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p); 338dbc2b5e9SXin Long 339957d761cSAlexey Kodanev if (IS_ERR(bdst)) 340957d761cSAlexey Kodanev continue; 341957d761cSAlexey Kodanev 342957d761cSAlexey Kodanev if (ipv6_chk_addr(dev_net(bdst->dev), 343dbc2b5e9SXin Long &laddr->a.v6.sin6_addr, bdst->dev, 1)) { 344dbc2b5e9SXin Long if (!IS_ERR_OR_NULL(dst)) 345dbc2b5e9SXin Long dst_release(dst); 346dbc2b5e9SXin Long dst = bdst; 347582eea23SMarcelo Ricardo Leitner t->dst = dst; 348582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 349dbc2b5e9SXin Long break; 350dbc2b5e9SXin Long } 351dbc2b5e9SXin Long 352dbc2b5e9SXin Long bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); 353957d761cSAlexey Kodanev if (matchlen > bmatchlen) { 354957d761cSAlexey Kodanev dst_release(bdst); 355dbc2b5e9SXin Long continue; 356957d761cSAlexey Kodanev } 357dbc2b5e9SXin Long 358dbc2b5e9SXin Long if (!IS_ERR_OR_NULL(dst)) 359dbc2b5e9SXin Long dst_release(dst); 360dbc2b5e9SXin Long dst = bdst; 361dbc2b5e9SXin Long matchlen = bmatchlen; 362582eea23SMarcelo Ricardo Leitner t->dst = dst; 363582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 36462503411SWeixing Shi } 36569ce6487SEric Dumazet rcu_read_unlock(); 3669914ae3cSVlad Yasevich 36762503411SWeixing Shi out: 368ee3f34e8STommi Rantala if (!IS_ERR_OR_NULL(dst)) { 3691da177e4SLinus Torvalds struct rt6_info *rt; 370bb33381dSDaniel Borkmann 3711da177e4SLinus Torvalds rt = (struct rt6_info *)dst; 372b197df4fSMartin KaFai Lau t->dst_cookie = rt6_get_cookie(rt); 373fd0273d7SMartin KaFai Lau pr_debug("rt6_dst:%pI6/%d rt6_src:%pI6\n", 374fd0273d7SMartin KaFai Lau &rt->rt6i_dst.addr, rt->rt6i_dst.plen, 375582eea23SMarcelo Ricardo Leitner &fl->u.ip6.saddr); 376da0420beSVlad Yasevich } else { 377da0420beSVlad Yasevich t->dst = NULL; 378bb33381dSDaniel Borkmann pr_debug("no route\n"); 379da0420beSVlad Yasevich } 3804251320fSVille Nuorvala } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds /* Returns the number of consecutive initial bits that match in the 2 ipv6 3831da177e4SLinus Torvalds * addresses. 3841da177e4SLinus Torvalds */ 3851da177e4SLinus Torvalds static inline int sctp_v6_addr_match_len(union sctp_addr *s1, 3861da177e4SLinus Torvalds union sctp_addr *s2) 3871da177e4SLinus Torvalds { 388de7737e0SYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds /* Fills in the source address(saddr) based on the destination address(daddr) 3921da177e4SLinus Torvalds * and asoc's bind address list. 3931da177e4SLinus Torvalds */ 394e5117101SYOSHIFUJI Hideaki static void sctp_v6_get_saddr(struct sctp_sock *sk, 3959914ae3cSVlad Yasevich struct sctp_transport *t, 3969914ae3cSVlad Yasevich struct flowi *fl) 3971da177e4SLinus Torvalds { 3989914ae3cSVlad Yasevich struct flowi6 *fl6 = &fl->u.ip6; 3999914ae3cSVlad Yasevich union sctp_addr *saddr = &t->saddr; 4001da177e4SLinus Torvalds 401bb33381dSDaniel Borkmann pr_debug("%s: asoc:%p dst:%p\n", __func__, t->asoc, t->dst); 4021da177e4SLinus Torvalds 4039914ae3cSVlad Yasevich if (t->dst) { 4049914ae3cSVlad Yasevich saddr->v6.sin6_family = AF_INET6; 4054e3fd7a0SAlexey Dobriyan saddr->v6.sin6_addr = fl6->saddr; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds /* Make a copy of all potential local addresses. */ 4101da177e4SLinus Torvalds static void sctp_v6_copy_addrlist(struct list_head *addrlist, 4111da177e4SLinus Torvalds struct net_device *dev) 4121da177e4SLinus Torvalds { 4131da177e4SLinus Torvalds struct inet6_dev *in6_dev; 4141da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 4151da177e4SLinus Torvalds struct sctp_sockaddr_entry *addr; 4161da177e4SLinus Torvalds 4178814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 4181da177e4SLinus Torvalds if ((in6_dev = __in6_dev_get(dev)) == NULL) { 4198814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 4201da177e4SLinus Torvalds return; 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 423e2eb8d45SJarek Poplawski read_lock_bh(&in6_dev->lock); 424502a2ffdSstephen hemminger list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 4251da177e4SLinus Torvalds /* Add the address to the local list. */ 426939cfa75SDaniel Borkmann addr = kzalloc(sizeof(*addr), GFP_ATOMIC); 4271da177e4SLinus Torvalds if (addr) { 4282a6fd78aSAl Viro addr->a.v6.sin6_family = AF_INET6; 4294e3fd7a0SAlexey Dobriyan addr->a.v6.sin6_addr = ifp->addr; 4302a6fd78aSAl Viro addr->a.v6.sin6_scope_id = dev->ifindex; 43129303547SVlad Yasevich addr->valid = 1; 4321da177e4SLinus Torvalds INIT_LIST_HEAD(&addr->list); 4331da177e4SLinus Torvalds list_add_tail(&addr->list, addrlist); 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds 437e2eb8d45SJarek Poplawski read_unlock_bh(&in6_dev->lock); 4388814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 441b7e10c25SRichard Haines /* Copy over any ip options */ 442b7e10c25SRichard Haines static void sctp_v6_copy_ip_options(struct sock *sk, struct sock *newsk) 443b7e10c25SRichard Haines { 444b7e10c25SRichard Haines struct ipv6_pinfo *newnp, *np = inet6_sk(sk); 445b7e10c25SRichard Haines struct ipv6_txoptions *opt; 446b7e10c25SRichard Haines 447b7e10c25SRichard Haines newnp = inet6_sk(newsk); 448b7e10c25SRichard Haines 449b7e10c25SRichard Haines rcu_read_lock(); 450b7e10c25SRichard Haines opt = rcu_dereference(np->opt); 451b7e10c25SRichard Haines if (opt) { 452b7e10c25SRichard Haines opt = ipv6_dup_options(newsk, opt); 453b7e10c25SRichard Haines if (!opt) 454b7e10c25SRichard Haines pr_err("%s: Failed to copy ip options\n", __func__); 455b7e10c25SRichard Haines } 456b7e10c25SRichard Haines RCU_INIT_POINTER(newnp->opt, opt); 457b7e10c25SRichard Haines rcu_read_unlock(); 458b7e10c25SRichard Haines } 459b7e10c25SRichard Haines 460b7e10c25SRichard Haines /* Account for the IP options */ 461b7e10c25SRichard Haines static int sctp_v6_ip_options_len(struct sock *sk) 462b7e10c25SRichard Haines { 463b7e10c25SRichard Haines struct ipv6_pinfo *np = inet6_sk(sk); 464b7e10c25SRichard Haines struct ipv6_txoptions *opt; 465b7e10c25SRichard Haines int len = 0; 466b7e10c25SRichard Haines 467b7e10c25SRichard Haines rcu_read_lock(); 468b7e10c25SRichard Haines opt = rcu_dereference(np->opt); 469b7e10c25SRichard Haines if (opt) 470b7e10c25SRichard Haines len = opt->opt_flen + opt->opt_nflen; 471b7e10c25SRichard Haines 472b7e10c25SRichard Haines rcu_read_unlock(); 473b7e10c25SRichard Haines return len; 474b7e10c25SRichard Haines } 475b7e10c25SRichard Haines 4761da177e4SLinus Torvalds /* Initialize a sockaddr_storage from in incoming skb. */ 4771da177e4SLinus Torvalds static void sctp_v6_from_skb(union sctp_addr *addr, struct sk_buff *skb, 4781da177e4SLinus Torvalds int is_saddr) 4791da177e4SLinus Torvalds { 4800630c56eSMarcelo Ricardo Leitner /* Always called on head skb, so this is safe */ 4810630c56eSMarcelo Ricardo Leitner struct sctphdr *sh = sctp_hdr(skb); 4820630c56eSMarcelo Ricardo Leitner struct sockaddr_in6 *sa = &addr->v6; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 4851da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* FIXME */ 4861da177e4SLinus Torvalds addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds if (is_saddr) { 4890630c56eSMarcelo Ricardo Leitner sa->sin6_port = sh->source; 4900630c56eSMarcelo Ricardo Leitner sa->sin6_addr = ipv6_hdr(skb)->saddr; 4911da177e4SLinus Torvalds } else { 4920630c56eSMarcelo Ricardo Leitner sa->sin6_port = sh->dest; 4930630c56eSMarcelo Ricardo Leitner sa->sin6_addr = ipv6_hdr(skb)->daddr; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds } 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds /* Initialize an sctp_addr from a socket. */ 4981da177e4SLinus Torvalds static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) 4991da177e4SLinus Torvalds { 5001da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5017dcdbd95SAl Viro addr->v6.sin6_port = 0; 502efe4208fSEric Dumazet addr->v6.sin6_addr = sk->sk_v6_rcv_saddr; 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds /* Initialize sk->sk_rcv_saddr from sctp_addr. */ 5061da177e4SLinus Torvalds static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) 5071da177e4SLinus Torvalds { 508299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) { 509efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[0] = 0; 510efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[1] = 0; 511efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); 512efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[3] = 5131da177e4SLinus Torvalds addr->v4.sin_addr.s_addr; 5141da177e4SLinus Torvalds } else { 515efe4208fSEric Dumazet sk->sk_v6_rcv_saddr = addr->v6.sin6_addr; 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds } 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds /* Initialize sk->sk_daddr from sctp_addr. */ 5201da177e4SLinus Torvalds static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) 5211da177e4SLinus Torvalds { 522299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) { 523efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[0] = 0; 524efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[1] = 0; 525efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[2] = htonl(0x0000ffff); 526efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; 5271da177e4SLinus Torvalds } else { 528efe4208fSEric Dumazet sk->sk_v6_daddr = addr->v6.sin6_addr; 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds } 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds /* Initialize a sctp_addr from an address parameter. */ 5331da177e4SLinus Torvalds static void sctp_v6_from_addr_param(union sctp_addr *addr, 5341da177e4SLinus Torvalds union sctp_addr_param *param, 535dd86d136SAl Viro __be16 port, int iif) 5361da177e4SLinus Torvalds { 5371da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5381da177e4SLinus Torvalds addr->v6.sin6_port = port; 5391da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* BUG */ 5404e3fd7a0SAlexey Dobriyan addr->v6.sin6_addr = param->v6.addr; 5411da177e4SLinus Torvalds addr->v6.sin6_scope_id = iif; 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds /* Initialize an address parameter from a sctp_addr and return the length 5451da177e4SLinus Torvalds * of the address parameter. 5461da177e4SLinus Torvalds */ 5471da177e4SLinus Torvalds static int sctp_v6_to_addr_param(const union sctp_addr *addr, 5481da177e4SLinus Torvalds union sctp_addr_param *param) 5491da177e4SLinus Torvalds { 55000987cc0SXin Long int length = sizeof(struct sctp_ipv6addr_param); 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; 553dbc16db1SAl Viro param->v6.param_hdr.length = htons(length); 5544e3fd7a0SAlexey Dobriyan param->v6.addr = addr->v6.sin6_addr; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds return length; 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds 5599914ae3cSVlad Yasevich /* Initialize a sctp_addr from struct in6_addr. */ 5609914ae3cSVlad Yasevich static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, 561854d43a4SAl Viro __be16 port) 5621da177e4SLinus Torvalds { 5631da177e4SLinus Torvalds addr->sa.sa_family = AF_INET6; 5641da177e4SLinus Torvalds addr->v6.sin6_port = port; 56515339e44SAlexander Potapenko addr->v6.sin6_flowinfo = 0; 5664e3fd7a0SAlexey Dobriyan addr->v6.sin6_addr = *saddr; 56715339e44SAlexander Potapenko addr->v6.sin6_scope_id = 0; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds 5701071ec9dSXin Long static int __sctp_v6_cmp_addr(const union sctp_addr *addr1, 5711071ec9dSXin Long const union sctp_addr *addr2) 5721071ec9dSXin Long { 5731071ec9dSXin Long if (addr1->sa.sa_family != addr2->sa.sa_family) { 5741071ec9dSXin Long if (addr1->sa.sa_family == AF_INET && 5751071ec9dSXin Long addr2->sa.sa_family == AF_INET6 && 5761071ec9dSXin Long ipv6_addr_v4mapped(&addr2->v6.sin6_addr) && 5771071ec9dSXin Long addr2->v6.sin6_addr.s6_addr32[3] == 5781071ec9dSXin Long addr1->v4.sin_addr.s_addr) 5791071ec9dSXin Long return 1; 5801071ec9dSXin Long 5811071ec9dSXin Long if (addr2->sa.sa_family == AF_INET && 5821071ec9dSXin Long addr1->sa.sa_family == AF_INET6 && 5831071ec9dSXin Long ipv6_addr_v4mapped(&addr1->v6.sin6_addr) && 5841071ec9dSXin Long addr1->v6.sin6_addr.s6_addr32[3] == 5851071ec9dSXin Long addr2->v4.sin_addr.s_addr) 5861071ec9dSXin Long return 1; 5871071ec9dSXin Long 5881071ec9dSXin Long return 0; 5891071ec9dSXin Long } 5901071ec9dSXin Long 5911071ec9dSXin Long if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) 5921071ec9dSXin Long return 0; 5931071ec9dSXin Long 5941071ec9dSXin Long /* If this is a linklocal address, compare the scope_id. */ 5951071ec9dSXin Long if ((ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) && 5961071ec9dSXin Long addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && 5971071ec9dSXin Long addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id) 5981071ec9dSXin Long return 0; 5991071ec9dSXin Long 6001071ec9dSXin Long return 1; 6011071ec9dSXin Long } 6021071ec9dSXin Long 6031da177e4SLinus Torvalds /* Compare addresses exactly. 6041da177e4SLinus Torvalds * v4-mapped-v6 is also in consideration. 6051da177e4SLinus Torvalds */ 6061da177e4SLinus Torvalds static int sctp_v6_cmp_addr(const union sctp_addr *addr1, 6071da177e4SLinus Torvalds const union sctp_addr *addr2) 6081da177e4SLinus Torvalds { 6091071ec9dSXin Long return __sctp_v6_cmp_addr(addr1, addr2) && 6101071ec9dSXin Long addr1->v6.sin6_port == addr2->v6.sin6_port; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds /* Initialize addr struct to INADDR_ANY. */ 6146fbfa9f9SAl Viro static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) 6151da177e4SLinus Torvalds { 6161da177e4SLinus Torvalds memset(addr, 0x00, sizeof(union sctp_addr)); 6171da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 6181da177e4SLinus Torvalds addr->v6.sin6_port = port; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds /* Is this a wildcard address? */ 6221da177e4SLinus Torvalds static int sctp_v6_is_any(const union sctp_addr *addr) 6231da177e4SLinus Torvalds { 624b9b9e10fSBrian Haley return ipv6_addr_any(&addr->v6.sin6_addr); 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /* Should this be available for binding? */ 6281da177e4SLinus Torvalds static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds int type; 6319b974202SXin Long struct net *net = sock_net(&sp->inet.sk); 632b71d1d42SEric Dumazet const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds type = ipv6_addr_type(in6); 6351da177e4SLinus Torvalds if (IPV6_ADDR_ANY == type) 6361da177e4SLinus Torvalds return 1; 6371da177e4SLinus Torvalds if (type == IPV6_ADDR_MAPPED) { 6381da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 6391da177e4SLinus Torvalds return 0; 6401da177e4SLinus Torvalds sctp_v6_map_v4(addr); 6411da177e4SLinus Torvalds return sctp_get_af_specific(AF_INET)->available(addr, sp); 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds if (!(type & IPV6_ADDR_UNICAST)) 6441da177e4SLinus Torvalds return 0; 6451da177e4SLinus Torvalds 6469b974202SXin Long return sp->inet.freebind || net->ipv6.sysctl.ip_nonlocal_bind || 6479b974202SXin Long ipv6_chk_addr(net, in6, NULL, 0); 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds /* This function checks if the address is a valid address to be used for 6511da177e4SLinus Torvalds * SCTP. 6521da177e4SLinus Torvalds * 6531da177e4SLinus Torvalds * Output: 6541da177e4SLinus Torvalds * Return 0 - If the address is a non-unicast or an illegal address. 6551da177e4SLinus Torvalds * Return 1 - If the address is a unicast. 6561da177e4SLinus Torvalds */ 6575636bef7SVlad Yasevich static int sctp_v6_addr_valid(union sctp_addr *addr, 6585636bef7SVlad Yasevich struct sctp_sock *sp, 6595636bef7SVlad Yasevich const struct sk_buff *skb) 6601da177e4SLinus Torvalds { 6611da177e4SLinus Torvalds int ret = ipv6_addr_type(&addr->v6.sin6_addr); 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds /* Support v4-mapped-v6 address. */ 6641da177e4SLinus Torvalds if (ret == IPV6_ADDR_MAPPED) { 6651da177e4SLinus Torvalds /* Note: This routine is used in input, so v4-mapped-v6 6661da177e4SLinus Torvalds * are disallowed here when there is no sctp_sock. 6671da177e4SLinus Torvalds */ 6681da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 6691da177e4SLinus Torvalds return 0; 6701da177e4SLinus Torvalds sctp_v6_map_v4(addr); 6715636bef7SVlad Yasevich return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds /* Is this a non-unicast address */ 6751da177e4SLinus Torvalds if (!(ret & IPV6_ADDR_UNICAST)) 6761da177e4SLinus Torvalds return 0; 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds return 1; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds /* What is the scope of 'addr'? */ 6821c662018SXin Long static enum sctp_scope sctp_v6_scope(union sctp_addr *addr) 6831da177e4SLinus Torvalds { 6841c662018SXin Long enum sctp_scope retval; 6851da177e4SLinus Torvalds int v6scope; 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds /* The IPv6 scope is really a set of bit fields. 6881da177e4SLinus Torvalds * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. 6891da177e4SLinus Torvalds */ 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); 6921da177e4SLinus Torvalds switch (v6scope) { 6931da177e4SLinus Torvalds case IFA_HOST: 6941da177e4SLinus Torvalds retval = SCTP_SCOPE_LOOPBACK; 6951da177e4SLinus Torvalds break; 6961da177e4SLinus Torvalds case IFA_LINK: 6971da177e4SLinus Torvalds retval = SCTP_SCOPE_LINK; 6981da177e4SLinus Torvalds break; 6991da177e4SLinus Torvalds case IFA_SITE: 7001da177e4SLinus Torvalds retval = SCTP_SCOPE_PRIVATE; 7011da177e4SLinus Torvalds break; 7021da177e4SLinus Torvalds default: 7031da177e4SLinus Torvalds retval = SCTP_SCOPE_GLOBAL; 7041da177e4SLinus Torvalds break; 7053ff50b79SStephen Hemminger } 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds return retval; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds /* Create and initialize a new sk for the socket to be returned by accept(). */ 7111da177e4SLinus Torvalds static struct sock *sctp_v6_create_accept_sk(struct sock *sk, 712cdfbabfbSDavid Howells struct sctp_association *asoc, 713cdfbabfbSDavid Howells bool kern) 7141da177e4SLinus Torvalds { 7151da177e4SLinus Torvalds struct sock *newsk; 7161da177e4SLinus Torvalds struct ipv6_pinfo *newnp, *np = inet6_sk(sk); 7171da177e4SLinus Torvalds struct sctp6_sock *newsctp6sk; 7181da177e4SLinus Torvalds 719cdfbabfbSDavid Howells newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot, kern); 7201da177e4SLinus Torvalds if (!newsk) 7211da177e4SLinus Torvalds goto out; 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds sock_init_data(NULL, newsk); 7241da177e4SLinus Torvalds 725914e1c8bSVlad Yasevich sctp_copy_sock(newsk, sk, asoc); 7261da177e4SLinus Torvalds sock_reset_flag(sk, SOCK_ZAPPED); 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds newsctp6sk = (struct sctp6_sock *)newsk; 7291da177e4SLinus Torvalds inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; 7301da177e4SLinus Torvalds 731b225b884SDave Johnson sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; 732b225b884SDave Johnson 7331da177e4SLinus Torvalds newnp = inet6_sk(newsk); 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds memcpy(newnp, np, sizeof(struct ipv6_pinfo)); 736fdcee2cbSEric Dumazet newnp->ipv6_mc_list = NULL; 737fdcee2cbSEric Dumazet newnp->ipv6_ac_list = NULL; 738fdcee2cbSEric Dumazet newnp->ipv6_fl_list = NULL; 7391da177e4SLinus Torvalds 740b7e10c25SRichard Haines sctp_v6_copy_ip_options(sk, newsk); 7419470e24fSEric Dumazet 7421da177e4SLinus Torvalds /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() 7431da177e4SLinus Torvalds * and getpeername(). 7441da177e4SLinus Torvalds */ 7451da177e4SLinus Torvalds sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); 7461da177e4SLinus Torvalds 747661dbf34SMatija Glavinic Pecotic newsk->sk_v6_rcv_saddr = sk->sk_v6_rcv_saddr; 748661dbf34SMatija Glavinic Pecotic 749e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(newsk); 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds if (newsk->sk_prot->init(newsk)) { 7521da177e4SLinus Torvalds sk_common_release(newsk); 7531da177e4SLinus Torvalds newsk = NULL; 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds out: 7571da177e4SLinus Torvalds return newsk; 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds 760299ee123SJason Gunthorpe /* Format a sockaddr for return to user space. This makes sure the return is 761299ee123SJason Gunthorpe * AF_INET or AF_INET6 depending on the SCTP_I_WANT_MAPPED_V4_ADDR option. 762299ee123SJason Gunthorpe */ 763299ee123SJason Gunthorpe static int sctp_v6_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr) 7641da177e4SLinus Torvalds { 765299ee123SJason Gunthorpe if (sp->v4mapped) { 766299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) 7671da177e4SLinus Torvalds sctp_v4_map_v6(addr); 768299ee123SJason Gunthorpe } else { 769299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET6 && 770299ee123SJason Gunthorpe ipv6_addr_v4mapped(&addr->v6.sin6_addr)) 771299ee123SJason Gunthorpe sctp_v6_map_v4(addr); 772299ee123SJason Gunthorpe } 773299ee123SJason Gunthorpe 7746780db24SEric Dumazet if (addr->sa.sa_family == AF_INET) { 7756780db24SEric Dumazet memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero)); 776299ee123SJason Gunthorpe return sizeof(struct sockaddr_in); 7776780db24SEric Dumazet } 778299ee123SJason Gunthorpe return sizeof(struct sockaddr_in6); 7791da177e4SLinus Torvalds } 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds /* Where did this skb come from? */ 7821da177e4SLinus Torvalds static int sctp_v6_skb_iif(const struct sk_buff *skb) 7831da177e4SLinus Torvalds { 7841f45f78fSMarcelo Ricardo Leitner return IP6CB(skb)->iif; 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds /* Was this packet marked by Explicit Congestion Notification? */ 7881da177e4SLinus Torvalds static int sctp_v6_is_ce(const struct sk_buff *skb) 7891da177e4SLinus Torvalds { 790978aa047SXin Long return *((__u32 *)(ipv6_hdr(skb))) & (__force __u32)htonl(1 << 20); 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds /* Dump the v6 addr to the seq file. */ 7941da177e4SLinus Torvalds static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) 7951da177e4SLinus Torvalds { 7965b095d98SHarvey Harrison seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr); 7971da177e4SLinus Torvalds } 7981da177e4SLinus Torvalds 799b9031d9dSVlad Yasevich static void sctp_v6_ecn_capable(struct sock *sk) 800b9031d9dSVlad Yasevich { 801b9031d9dSVlad Yasevich inet6_sk(sk)->tclass |= INET_ECN_ECT_0; 802b9031d9dSVlad Yasevich } 803b9031d9dSVlad Yasevich 8041da177e4SLinus Torvalds /* Initialize a PF_INET msgname from a ulpevent. */ 8051da177e4SLinus Torvalds static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, 8061da177e4SLinus Torvalds char *msgname, int *addrlen) 8071da177e4SLinus Torvalds { 8081da177e4SLinus Torvalds union sctp_addr *addr; 8091da177e4SLinus Torvalds struct sctp_association *asoc; 810299ee123SJason Gunthorpe union sctp_addr *paddr; 8111da177e4SLinus Torvalds 812299ee123SJason Gunthorpe if (!msgname) 8131da177e4SLinus Torvalds return; 814299ee123SJason Gunthorpe 815299ee123SJason Gunthorpe addr = (union sctp_addr *)msgname; 816299ee123SJason Gunthorpe asoc = event->asoc; 817299ee123SJason Gunthorpe paddr = &asoc->peer.primary_addr; 818299ee123SJason Gunthorpe 819299ee123SJason Gunthorpe if (paddr->sa.sa_family == AF_INET) { 820299ee123SJason Gunthorpe addr->v4.sin_family = AF_INET; 821299ee123SJason Gunthorpe addr->v4.sin_port = htons(asoc->peer.port); 822299ee123SJason Gunthorpe addr->v4.sin_addr = paddr->v4.sin_addr; 823299ee123SJason Gunthorpe } else { 824299ee123SJason Gunthorpe addr->v6.sin6_family = AF_INET6; 825299ee123SJason Gunthorpe addr->v6.sin6_flowinfo = 0; 826299ee123SJason Gunthorpe if (ipv6_addr_type(&paddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 827299ee123SJason Gunthorpe addr->v6.sin6_scope_id = paddr->v6.sin6_scope_id; 828299ee123SJason Gunthorpe else 829299ee123SJason Gunthorpe addr->v6.sin6_scope_id = 0; 830299ee123SJason Gunthorpe addr->v6.sin6_port = htons(asoc->peer.port); 831299ee123SJason Gunthorpe addr->v6.sin6_addr = paddr->v6.sin6_addr; 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds 834299ee123SJason Gunthorpe *addrlen = sctp_v6_addr_to_user(sctp_sk(asoc->base.sk), addr); 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds /* Initialize a msg_name from an inbound skb. */ 8381da177e4SLinus Torvalds static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, 8391da177e4SLinus Torvalds int *addr_len) 8401da177e4SLinus Torvalds { 841299ee123SJason Gunthorpe union sctp_addr *addr; 8421da177e4SLinus Torvalds struct sctphdr *sh; 8431da177e4SLinus Torvalds 844299ee123SJason Gunthorpe if (!msgname) 8451da177e4SLinus Torvalds return; 846299ee123SJason Gunthorpe 847299ee123SJason Gunthorpe addr = (union sctp_addr *)msgname; 848299ee123SJason Gunthorpe sh = sctp_hdr(skb); 849299ee123SJason Gunthorpe 850299ee123SJason Gunthorpe if (ip_hdr(skb)->version == 4) { 851299ee123SJason Gunthorpe addr->v4.sin_family = AF_INET; 852299ee123SJason Gunthorpe addr->v4.sin_port = sh->source; 853299ee123SJason Gunthorpe addr->v4.sin_addr.s_addr = ip_hdr(skb)->saddr; 854299ee123SJason Gunthorpe } else { 855299ee123SJason Gunthorpe addr->v6.sin6_family = AF_INET6; 856299ee123SJason Gunthorpe addr->v6.sin6_flowinfo = 0; 857299ee123SJason Gunthorpe addr->v6.sin6_port = sh->source; 858299ee123SJason Gunthorpe addr->v6.sin6_addr = ipv6_hdr(skb)->saddr; 8597c8a61d9SEric W. Biederman if (ipv6_addr_type(&addr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 8601f45f78fSMarcelo Ricardo Leitner addr->v6.sin6_scope_id = sctp_v6_skb_iif(skb); 8617c8a61d9SEric W. Biederman else 8627c8a61d9SEric W. Biederman addr->v6.sin6_scope_id = 0; 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds 865299ee123SJason Gunthorpe *addr_len = sctp_v6_addr_to_user(sctp_sk(skb->sk), addr); 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds /* Do we support this AF? */ 8691da177e4SLinus Torvalds static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) 8701da177e4SLinus Torvalds { 8711da177e4SLinus Torvalds switch (family) { 8721da177e4SLinus Torvalds case AF_INET6: 8731da177e4SLinus Torvalds return 1; 8741da177e4SLinus Torvalds /* v4-mapped-v6 addresses */ 8751da177e4SLinus Torvalds case AF_INET: 8767dab83deSVlad Yasevich if (!__ipv6_only_sock(sctp_opt2sk(sp))) 8771da177e4SLinus Torvalds return 1; 87837f47bc9SMarcelo Ricardo Leitner /* fallthru */ 8791da177e4SLinus Torvalds default: 8801da177e4SLinus Torvalds return 0; 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds /* Address matching with wildcards allowed. This extra level 8851da177e4SLinus Torvalds * of indirection lets us choose whether a PF_INET6 should 8861da177e4SLinus Torvalds * disallow any v4 addresses if we so choose. 8871da177e4SLinus Torvalds */ 8881da177e4SLinus Torvalds static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, 8891da177e4SLinus Torvalds const union sctp_addr *addr2, 8901da177e4SLinus Torvalds struct sctp_sock *opt) 8911da177e4SLinus Torvalds { 89252cae8f0SVlad Yasevich struct sock *sk = sctp_opt2sk(opt); 8931071ec9dSXin Long struct sctp_af *af1, *af2; 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds af1 = sctp_get_af_specific(addr1->sa.sa_family); 8961da177e4SLinus Torvalds af2 = sctp_get_af_specific(addr2->sa.sa_family); 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds if (!af1 || !af2) 8991da177e4SLinus Torvalds return 0; 9007dab83deSVlad Yasevich 9017dab83deSVlad Yasevich /* If the socket is IPv6 only, v4 addrs will not match */ 90252cae8f0SVlad Yasevich if (__ipv6_only_sock(sk) && af1 != af2) 9037dab83deSVlad Yasevich return 0; 9047dab83deSVlad Yasevich 9051da177e4SLinus Torvalds /* Today, wildcard AF_INET/AF_INET6. */ 90652cae8f0SVlad Yasevich if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) 9071da177e4SLinus Torvalds return 1; 9081da177e4SLinus Torvalds 909d625329bSXin Long if (addr1->sa.sa_family == AF_INET && addr2->sa.sa_family == AF_INET) 910d625329bSXin Long return addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr; 911d625329bSXin Long 9121071ec9dSXin Long return __sctp_v6_cmp_addr(addr1, addr2); 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds /* Verify that the provided sockaddr looks bindable. Common verification, 9161da177e4SLinus Torvalds * has already been taken care of. 9171da177e4SLinus Torvalds */ 9181da177e4SLinus Torvalds static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) 9191da177e4SLinus Torvalds { 9201da177e4SLinus Torvalds struct sctp_af *af; 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 9231da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 9241da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 9251da177e4SLinus Torvalds else { 9261da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 9276a6ddb2aSSridhar Samudrala struct net_device *dev; 9281da177e4SLinus Torvalds 9296a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 930bb2db45bSEric W. Biederman struct net *net; 9316a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 9321da177e4SLinus Torvalds return 0; 933bb2db45bSEric W. Biederman net = sock_net(&opt->inet.sk); 93440c9c31eSEric Dumazet rcu_read_lock(); 935bb2db45bSEric W. Biederman dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id); 936b71d21c2SLaszlo Toth if (!dev || !(opt->inet.freebind || 937b71d21c2SLaszlo Toth net->ipv6.sysctl.ip_nonlocal_bind || 938b71d21c2SLaszlo Toth ipv6_chk_addr(net, &addr->v6.sin6_addr, 939b71d21c2SLaszlo Toth dev, 0))) { 94040c9c31eSEric Dumazet rcu_read_unlock(); 9411669d857SVlad Yasevich return 0; 9421669d857SVlad Yasevich } 94340c9c31eSEric Dumazet rcu_read_unlock(); 9441da177e4SLinus Torvalds } 9457dab83deSVlad Yasevich 9461da177e4SLinus Torvalds af = opt->pf->af; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds return af->available(addr, opt); 9491da177e4SLinus Torvalds } 9501da177e4SLinus Torvalds 9516a6ddb2aSSridhar Samudrala /* Verify that the provided sockaddr looks sendable. Common verification, 9521da177e4SLinus Torvalds * has already been taken care of. 9531da177e4SLinus Torvalds */ 9541da177e4SLinus Torvalds static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) 9551da177e4SLinus Torvalds { 9561da177e4SLinus Torvalds struct sctp_af *af = NULL; 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 9591da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 9601da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 9611da177e4SLinus Torvalds else { 9621da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 9636a6ddb2aSSridhar Samudrala struct net_device *dev; 9641da177e4SLinus Torvalds 9656a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 9666a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 9671da177e4SLinus Torvalds return 0; 96840c9c31eSEric Dumazet rcu_read_lock(); 969bb2db45bSEric W. Biederman dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk), 97040c9c31eSEric Dumazet addr->v6.sin6_scope_id); 97140c9c31eSEric Dumazet rcu_read_unlock(); 9726a6ddb2aSSridhar Samudrala if (!dev) 9736a6ddb2aSSridhar Samudrala return 0; 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds af = opt->pf->af; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds return af != NULL; 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds /* Fill in Supported Address Type information for INIT and INIT-ACK 9821da177e4SLinus Torvalds * chunks. Note: In the future, we may want to look at sock options 9831da177e4SLinus Torvalds * to determine whether a PF_INET6 socket really wants to have IPV4 9841da177e4SLinus Torvalds * addresses. 9851da177e4SLinus Torvalds * Returns number of addresses supported. 9861da177e4SLinus Torvalds */ 9871da177e4SLinus Torvalds static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, 9883dbe8656SAl Viro __be16 *types) 9891da177e4SLinus Torvalds { 9907dab83deSVlad Yasevich types[0] = SCTP_PARAM_IPV6_ADDRESS; 9917dab83deSVlad Yasevich if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { 9927dab83deSVlad Yasevich types[1] = SCTP_PARAM_IPV4_ADDRESS; 9931da177e4SLinus Torvalds return 2; 9941da177e4SLinus Torvalds } 9957dab83deSVlad Yasevich return 1; 9967dab83deSVlad Yasevich } 9971da177e4SLinus Torvalds 998299ee123SJason Gunthorpe /* Handle SCTP_I_WANT_MAPPED_V4_ADDR for getpeername() and getsockname() */ 999299ee123SJason Gunthorpe static int sctp_getname(struct socket *sock, struct sockaddr *uaddr, 10009b2c45d4SDenys Vlasenko int peer) 1001299ee123SJason Gunthorpe { 1002299ee123SJason Gunthorpe int rc; 1003299ee123SJason Gunthorpe 10049b2c45d4SDenys Vlasenko rc = inet6_getname(sock, uaddr, peer); 1005299ee123SJason Gunthorpe 10069b2c45d4SDenys Vlasenko if (rc < 0) 1007299ee123SJason Gunthorpe return rc; 1008299ee123SJason Gunthorpe 10099b2c45d4SDenys Vlasenko rc = sctp_v6_addr_to_user(sctp_sk(sock->sk), 1010299ee123SJason Gunthorpe (union sctp_addr *)uaddr); 1011299ee123SJason Gunthorpe 1012299ee123SJason Gunthorpe return rc; 1013299ee123SJason Gunthorpe } 1014299ee123SJason Gunthorpe 101590ddc4f0SEric Dumazet static const struct proto_ops inet6_seqpacket_ops = { 10161da177e4SLinus Torvalds .family = PF_INET6, 10171da177e4SLinus Torvalds .owner = THIS_MODULE, 10181da177e4SLinus Torvalds .release = inet6_release, 10191da177e4SLinus Torvalds .bind = inet6_bind, 1020644fbdeaSXin Long .connect = sctp_inet_connect, 10211da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 10221da177e4SLinus Torvalds .accept = inet_accept, 1023299ee123SJason Gunthorpe .getname = sctp_getname, 1024a11e1d43SLinus Torvalds .poll = sctp_poll, 10251da177e4SLinus Torvalds .ioctl = inet6_ioctl, 1026c7cbdbf2SArnd Bergmann .gettstamp = sock_gettstamp, 10271da177e4SLinus Torvalds .listen = sctp_inet_listen, 10281da177e4SLinus Torvalds .shutdown = inet_shutdown, 10291da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 10301da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 1031543d9cfeSArnaldo Carvalho de Melo .sendmsg = inet_sendmsg, 1032fd2d180aSXin Long .recvmsg = inet_recvmsg, 1033543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 10343fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 10353986912fSChristoph Hellwig .compat_ioctl = inet6_compat_ioctl, 10363fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 10373fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 10383fdadf7dSDmitry Mishin #endif 10391da177e4SLinus Torvalds }; 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds static struct inet_protosw sctpv6_seqpacket_protosw = { 10421da177e4SLinus Torvalds .type = SOCK_SEQPACKET, 10431da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 10441da177e4SLinus Torvalds .prot = &sctpv6_prot, 10451da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 10461da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG 10471da177e4SLinus Torvalds }; 10481da177e4SLinus Torvalds static struct inet_protosw sctpv6_stream_protosw = { 10491da177e4SLinus Torvalds .type = SOCK_STREAM, 10501da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 10511da177e4SLinus Torvalds .prot = &sctpv6_prot, 10521da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 10531da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG, 10541da177e4SLinus Torvalds }; 10551da177e4SLinus Torvalds 1056e5bbef20SHerbert Xu static int sctp6_rcv(struct sk_buff *skb) 10571da177e4SLinus Torvalds { 1058e5bbef20SHerbert Xu return sctp_rcv(skb) ? -1 : 0; 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds 106141135cc8SAlexey Dobriyan static const struct inet6_protocol sctpv6_protocol = { 10621da177e4SLinus Torvalds .handler = sctp6_rcv, 10631da177e4SLinus Torvalds .err_handler = sctp_v6_err, 10641da177e4SLinus Torvalds .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, 10651da177e4SLinus Torvalds }; 10661da177e4SLinus Torvalds 106715efbe76SNeil Horman static struct sctp_af sctp_af_inet6 = { 1068543d9cfeSArnaldo Carvalho de Melo .sa_family = AF_INET6, 10691da177e4SLinus Torvalds .sctp_xmit = sctp_v6_xmit, 10701da177e4SLinus Torvalds .setsockopt = ipv6_setsockopt, 10711da177e4SLinus Torvalds .getsockopt = ipv6_getsockopt, 10721da177e4SLinus Torvalds .get_dst = sctp_v6_get_dst, 10731da177e4SLinus Torvalds .get_saddr = sctp_v6_get_saddr, 10741da177e4SLinus Torvalds .copy_addrlist = sctp_v6_copy_addrlist, 10751da177e4SLinus Torvalds .from_skb = sctp_v6_from_skb, 10761da177e4SLinus Torvalds .from_sk = sctp_v6_from_sk, 10771da177e4SLinus Torvalds .from_addr_param = sctp_v6_from_addr_param, 10781da177e4SLinus Torvalds .to_addr_param = sctp_v6_to_addr_param, 10791da177e4SLinus Torvalds .cmp_addr = sctp_v6_cmp_addr, 10801da177e4SLinus Torvalds .scope = sctp_v6_scope, 10811da177e4SLinus Torvalds .addr_valid = sctp_v6_addr_valid, 10821da177e4SLinus Torvalds .inaddr_any = sctp_v6_inaddr_any, 10831da177e4SLinus Torvalds .is_any = sctp_v6_is_any, 10841da177e4SLinus Torvalds .available = sctp_v6_available, 10851da177e4SLinus Torvalds .skb_iif = sctp_v6_skb_iif, 10861da177e4SLinus Torvalds .is_ce = sctp_v6_is_ce, 10871da177e4SLinus Torvalds .seq_dump_addr = sctp_v6_seq_dump_addr, 1088b9031d9dSVlad Yasevich .ecn_capable = sctp_v6_ecn_capable, 10891da177e4SLinus Torvalds .net_header_len = sizeof(struct ipv6hdr), 10901da177e4SLinus Torvalds .sockaddr_len = sizeof(struct sockaddr_in6), 1091b7e10c25SRichard Haines .ip_options_len = sctp_v6_ip_options_len, 1092543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1093543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_ipv6_setsockopt, 1094543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_ipv6_getsockopt, 1095543d9cfeSArnaldo Carvalho de Melo #endif 10961da177e4SLinus Torvalds }; 10971da177e4SLinus Torvalds 109815efbe76SNeil Horman static struct sctp_pf sctp_pf_inet6 = { 10991da177e4SLinus Torvalds .event_msgname = sctp_inet6_event_msgname, 11001da177e4SLinus Torvalds .skb_msgname = sctp_inet6_skb_msgname, 11011da177e4SLinus Torvalds .af_supported = sctp_inet6_af_supported, 11021da177e4SLinus Torvalds .cmp_addr = sctp_inet6_cmp_addr, 11031da177e4SLinus Torvalds .bind_verify = sctp_inet6_bind_verify, 11041da177e4SLinus Torvalds .send_verify = sctp_inet6_send_verify, 11051da177e4SLinus Torvalds .supported_addrs = sctp_inet6_supported_addrs, 11061da177e4SLinus Torvalds .create_accept_sk = sctp_v6_create_accept_sk, 1107299ee123SJason Gunthorpe .addr_to_user = sctp_v6_addr_to_user, 1108299ee123SJason Gunthorpe .to_sk_saddr = sctp_v6_to_sk_saddr, 1109299ee123SJason Gunthorpe .to_sk_daddr = sctp_v6_to_sk_daddr, 1110b7e10c25SRichard Haines .copy_ip_options = sctp_v6_copy_ip_options, 111115efbe76SNeil Horman .af = &sctp_af_inet6, 11121da177e4SLinus Torvalds }; 11131da177e4SLinus Torvalds 1114827bf122SSridhar Samudrala /* Initialize IPv6 support and register with socket layer. */ 1115270637abSVlad Yasevich void sctp_v6_pf_init(void) 11161da177e4SLinus Torvalds { 11171da177e4SLinus Torvalds /* Register the SCTP specific PF_INET6 functions. */ 111815efbe76SNeil Horman sctp_register_pf(&sctp_pf_inet6, PF_INET6); 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds /* Register the SCTP specific AF_INET6 functions. */ 112115efbe76SNeil Horman sctp_register_af(&sctp_af_inet6); 1122270637abSVlad Yasevich } 1123270637abSVlad Yasevich 1124270637abSVlad Yasevich void sctp_v6_pf_exit(void) 1125270637abSVlad Yasevich { 1126270637abSVlad Yasevich list_del(&sctp_af_inet6.list); 1127270637abSVlad Yasevich } 1128270637abSVlad Yasevich 1129270637abSVlad Yasevich /* Initialize IPv6 support and register with socket layer. */ 1130270637abSVlad Yasevich int sctp_v6_protosw_init(void) 1131270637abSVlad Yasevich { 1132270637abSVlad Yasevich int rc; 11331da177e4SLinus Torvalds 1134827bf122SSridhar Samudrala rc = proto_register(&sctpv6_prot, 1); 1135827bf122SSridhar Samudrala if (rc) 1136827bf122SSridhar Samudrala return rc; 1137827bf122SSridhar Samudrala 1138827bf122SSridhar Samudrala /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ 1139827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_seqpacket_protosw); 1140827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_stream_protosw); 1141827bf122SSridhar Samudrala 1142827bf122SSridhar Samudrala return 0; 1143827bf122SSridhar Samudrala } 1144827bf122SSridhar Samudrala 1145270637abSVlad Yasevich void sctp_v6_protosw_exit(void) 1146270637abSVlad Yasevich { 1147270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_seqpacket_protosw); 1148270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_stream_protosw); 1149270637abSVlad Yasevich proto_unregister(&sctpv6_prot); 1150270637abSVlad Yasevich } 1151270637abSVlad Yasevich 1152270637abSVlad Yasevich 1153827bf122SSridhar Samudrala /* Register with inet6 layer. */ 1154827bf122SSridhar Samudrala int sctp_v6_add_protocol(void) 1155827bf122SSridhar Samudrala { 11561da177e4SLinus Torvalds /* Register notifier for inet6 address additions/deletions. */ 11571da177e4SLinus Torvalds register_inet6addr_notifier(&sctp_inet6addr_notifier); 1158827bf122SSridhar Samudrala 1159827bf122SSridhar Samudrala if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) 1160827bf122SSridhar Samudrala return -EAGAIN; 1161827bf122SSridhar Samudrala 1162827bf122SSridhar Samudrala return 0; 11631da177e4SLinus Torvalds } 11641da177e4SLinus Torvalds 1165827bf122SSridhar Samudrala /* Unregister with inet6 layer. */ 1166827bf122SSridhar Samudrala void sctp_v6_del_protocol(void) 1167827bf122SSridhar Samudrala { 1168827bf122SSridhar Samudrala inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); 1169827bf122SSridhar Samudrala unregister_inet6addr_notifier(&sctp_inet6addr_notifier); 11701da177e4SLinus Torvalds } 1171