160c778b2SVlad Yasevich /* SCTP kernel implementation 21da177e4SLinus Torvalds * (C) Copyright IBM Corp. 2002, 2004 31da177e4SLinus Torvalds * Copyright (c) 2001 Nokia, Inc. 41da177e4SLinus Torvalds * Copyright (c) 2001 La Monte H.P. Yarroll 51da177e4SLinus Torvalds * Copyright (c) 2002-2003 Intel Corp. 61da177e4SLinus Torvalds * 760c778b2SVlad Yasevich * This file is part of the SCTP kernel implementation 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * SCTP over IPv6. 101da177e4SLinus Torvalds * 1160c778b2SVlad Yasevich * This SCTP implementation is free software; 121da177e4SLinus Torvalds * you can redistribute it and/or modify it under the terms of 131da177e4SLinus Torvalds * the GNU General Public License as published by 141da177e4SLinus Torvalds * the Free Software Foundation; either version 2, or (at your option) 151da177e4SLinus Torvalds * any later version. 161da177e4SLinus Torvalds * 1760c778b2SVlad Yasevich * This SCTP implementation is distributed in the hope that it 181da177e4SLinus Torvalds * will be useful, but WITHOUT ANY WARRANTY; without even the implied 191da177e4SLinus Torvalds * ************************ 201da177e4SLinus Torvalds * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 211da177e4SLinus Torvalds * See the GNU General Public License for more details. 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 244b2f13a2SJeff Kirsher * along with GNU CC; see the file COPYING. If not, see 254b2f13a2SJeff Kirsher * <http://www.gnu.org/licenses/>. 261da177e4SLinus Torvalds * 271da177e4SLinus Torvalds * Please send any bug reports or fixes you make to the 281da177e4SLinus Torvalds * email address(es): 2991705c61SDaniel Borkmann * lksctp developers <linux-sctp@vger.kernel.org> 301da177e4SLinus Torvalds * 311da177e4SLinus Torvalds * Written or modified by: 321da177e4SLinus Torvalds * Le Yanqun <yanqun.le@nokia.com> 331da177e4SLinus Torvalds * Hui Huang <hui.huang@nokia.com> 341da177e4SLinus Torvalds * La Monte H.P. Yarroll <piggy@acm.org> 351da177e4SLinus Torvalds * Sridhar Samudrala <sri@us.ibm.com> 361da177e4SLinus Torvalds * Jon Grimm <jgrimm@us.ibm.com> 371da177e4SLinus Torvalds * Ardelle Fan <ardelle.fan@intel.com> 381da177e4SLinus Torvalds * 391da177e4SLinus Torvalds * Based on: 401da177e4SLinus Torvalds * linux/net/ipv6/tcp_ipv6.c 411da177e4SLinus Torvalds */ 421da177e4SLinus Torvalds 43145ce502SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 44145ce502SJoe Perches 451da177e4SLinus Torvalds #include <linux/module.h> 461da177e4SLinus Torvalds #include <linux/errno.h> 471da177e4SLinus Torvalds #include <linux/types.h> 481da177e4SLinus Torvalds #include <linux/socket.h> 491da177e4SLinus Torvalds #include <linux/sockios.h> 501da177e4SLinus Torvalds #include <linux/net.h> 511da177e4SLinus Torvalds #include <linux/in.h> 521da177e4SLinus Torvalds #include <linux/in6.h> 531da177e4SLinus Torvalds #include <linux/netdevice.h> 541da177e4SLinus Torvalds #include <linux/init.h> 551da177e4SLinus Torvalds #include <linux/ipsec.h> 565a0e3ad6STejun Heo #include <linux/slab.h> 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds #include <linux/ipv6.h> 591da177e4SLinus Torvalds #include <linux/icmpv6.h> 601da177e4SLinus Torvalds #include <linux/random.h> 611da177e4SLinus Torvalds #include <linux/seq_file.h> 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds #include <net/protocol.h> 641da177e4SLinus Torvalds #include <net/ndisc.h> 65c752f073SArnaldo Carvalho de Melo #include <net/ip.h> 661da177e4SLinus Torvalds #include <net/ipv6.h> 671da177e4SLinus Torvalds #include <net/transp_v6.h> 681da177e4SLinus Torvalds #include <net/addrconf.h> 691da177e4SLinus Torvalds #include <net/ip6_route.h> 701da177e4SLinus Torvalds #include <net/inet_common.h> 711da177e4SLinus Torvalds #include <net/inet_ecn.h> 721da177e4SLinus Torvalds #include <net/sctp/sctp.h> 731da177e4SLinus Torvalds 747c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 751da177e4SLinus Torvalds 7662503411SWeixing Shi static inline int sctp_v6_addr_match_len(union sctp_addr *s1, 7762503411SWeixing Shi union sctp_addr *s2); 789914ae3cSVlad Yasevich static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, 799914ae3cSVlad Yasevich __be16 port); 809914ae3cSVlad Yasevich static int sctp_v6_cmp_addr(const union sctp_addr *addr1, 819914ae3cSVlad Yasevich const union sctp_addr *addr2); 8262503411SWeixing Shi 8329303547SVlad Yasevich /* Event handler for inet6 address addition/deletion events. 8429303547SVlad Yasevich * The sctp_local_addr_list needs to be protocted by a spin lock since 8529303547SVlad Yasevich * multiple notifiers (say IPv4 and IPv6) may be running at the same 8629303547SVlad Yasevich * time and thus corrupt the list. 8729303547SVlad Yasevich * The reader side is protected with RCU. 8829303547SVlad Yasevich */ 8924123186SAdrian Bunk static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, 9029c7cf96SSridhar Samudrala void *ptr) 9129c7cf96SSridhar Samudrala { 9229c7cf96SSridhar Samudrala struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 9329303547SVlad Yasevich struct sctp_sockaddr_entry *addr = NULL; 9429303547SVlad Yasevich struct sctp_sockaddr_entry *temp; 954db67e80SEric W. Biederman struct net *net = dev_net(ifa->idev->dev); 9622626216SChidambar 'ilLogict' Zinnoury int found = 0; 9729c7cf96SSridhar Samudrala 9829c7cf96SSridhar Samudrala switch (ev) { 9929c7cf96SSridhar Samudrala case NETDEV_UP: 10029c7cf96SSridhar Samudrala addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); 10129c7cf96SSridhar Samudrala if (addr) { 10229c7cf96SSridhar Samudrala addr->a.v6.sin6_family = AF_INET6; 10329c7cf96SSridhar Samudrala addr->a.v6.sin6_port = 0; 1044e3fd7a0SAlexey Dobriyan addr->a.v6.sin6_addr = ifa->addr; 10529c7cf96SSridhar Samudrala addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; 10629303547SVlad Yasevich addr->valid = 1; 1074db67e80SEric W. Biederman spin_lock_bh(&net->sctp.local_addr_lock); 1084db67e80SEric W. Biederman list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list); 1094db67e80SEric W. Biederman sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW); 1104db67e80SEric W. Biederman spin_unlock_bh(&net->sctp.local_addr_lock); 11129c7cf96SSridhar Samudrala } 11229c7cf96SSridhar Samudrala break; 11329c7cf96SSridhar Samudrala case NETDEV_DOWN: 1144db67e80SEric W. Biederman spin_lock_bh(&net->sctp.local_addr_lock); 11529303547SVlad Yasevich list_for_each_entry_safe(addr, temp, 1164db67e80SEric W. Biederman &net->sctp.local_addr_list, list) { 117a40a7d15SPavel Emelyanov if (addr->a.sa.sa_family == AF_INET6 && 118a40a7d15SPavel Emelyanov ipv6_addr_equal(&addr->a.v6.sin6_addr, 11929303547SVlad Yasevich &ifa->addr)) { 1204db67e80SEric W. Biederman sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL); 12122626216SChidambar 'ilLogict' Zinnoury found = 1; 12229303547SVlad Yasevich addr->valid = 0; 12329303547SVlad Yasevich list_del_rcu(&addr->list); 12429c7cf96SSridhar Samudrala break; 12529c7cf96SSridhar Samudrala } 12629c7cf96SSridhar Samudrala } 1274db67e80SEric W. Biederman spin_unlock_bh(&net->sctp.local_addr_lock); 12822626216SChidambar 'ilLogict' Zinnoury if (found) 1291231f0baSLai Jiangshan kfree_rcu(addr, rcu); 13029c7cf96SSridhar Samudrala break; 13129c7cf96SSridhar Samudrala } 13229c7cf96SSridhar Samudrala 13329c7cf96SSridhar Samudrala return NOTIFY_DONE; 13429c7cf96SSridhar Samudrala } 13529c7cf96SSridhar Samudrala 1361da177e4SLinus Torvalds static struct notifier_block sctp_inet6addr_notifier = { 13729c7cf96SSridhar Samudrala .notifier_call = sctp_inet6addr_event, 1381da177e4SLinus Torvalds }; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds /* ICMP error handler. */ 14132bbd879SStefano Brivio static int sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 142d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info) 1431da177e4SLinus Torvalds { 1441da177e4SLinus Torvalds struct inet6_dev *idev; 1451da177e4SLinus Torvalds struct sock *sk; 1461da177e4SLinus Torvalds struct sctp_association *asoc; 1471da177e4SLinus Torvalds struct sctp_transport *transport; 1481da177e4SLinus Torvalds struct ipv6_pinfo *np; 1492c928e0eSSimon Horman __u16 saveip, savesctp; 15032bbd879SStefano Brivio int err, ret = 0; 1514110cc25SEric W. Biederman struct net *net = dev_net(skb->dev); 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds idev = in6_dev_get(skb->dev); 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds /* Fix up skb to look at the embedded net header. */ 156b0e380b1SArnaldo Carvalho de Melo saveip = skb->network_header; 157b0e380b1SArnaldo Carvalho de Melo savesctp = skb->transport_header; 1581ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 159a27ef749SArnaldo Carvalho de Melo skb_set_transport_header(skb, offset); 1604110cc25SEric W. Biederman sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); 1611da177e4SLinus Torvalds /* Put back, the original pointers. */ 162b0e380b1SArnaldo Carvalho de Melo skb->network_header = saveip; 163b0e380b1SArnaldo Carvalho de Melo skb->transport_header = savesctp; 1641da177e4SLinus Torvalds if (!sk) { 165a16292a0SEric Dumazet __ICMP6_INC_STATS(net, idev, ICMP6_MIB_INERRORS); 16632bbd879SStefano Brivio ret = -ENOENT; 1671da177e4SLinus Torvalds goto out; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds /* Warning: The sock lock is held. Remember to call 1711da177e4SLinus Torvalds * sctp_err_finish! 1721da177e4SLinus Torvalds */ 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds switch (type) { 1751da177e4SLinus Torvalds case ICMPV6_PKT_TOOBIG: 176790e38bcSHannes Frederic Sowa if (ip6_sk_accept_pmtu(sk)) 1771da177e4SLinus Torvalds sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); 1781da177e4SLinus Torvalds goto out_unlock; 1791da177e4SLinus Torvalds case ICMPV6_PARAMPROB: 1801da177e4SLinus Torvalds if (ICMPV6_UNK_NEXTHDR == code) { 181d1ad1ff2SSridhar Samudrala sctp_icmp_proto_unreachable(sk, asoc, transport); 1821da177e4SLinus Torvalds goto out_unlock; 1831da177e4SLinus Torvalds } 1841da177e4SLinus Torvalds break; 185ec18d9a2SDavid S. Miller case NDISC_REDIRECT: 186ec18d9a2SDavid S. Miller sctp_icmp_redirect(sk, transport, skb); 1873f96a532SDaniel Borkmann goto out_unlock; 1881da177e4SLinus Torvalds default: 1891da177e4SLinus Torvalds break; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds np = inet6_sk(sk); 1931da177e4SLinus Torvalds icmpv6_err_convert(type, code, &err); 1941da177e4SLinus Torvalds if (!sock_owned_by_user(sk) && np->recverr) { 1951da177e4SLinus Torvalds sk->sk_err = err; 1961da177e4SLinus Torvalds sk->sk_error_report(sk); 1971da177e4SLinus Torvalds } else { /* Only an error on timeout */ 1981da177e4SLinus Torvalds sk->sk_err_soft = err; 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds out_unlock: 202dae399d7SXin Long sctp_err_finish(sk, transport); 2031da177e4SLinus Torvalds out: 2041da177e4SLinus Torvalds if (likely(idev != NULL)) 2051da177e4SLinus Torvalds in6_dev_put(idev); 20632bbd879SStefano Brivio 20732bbd879SStefano Brivio return ret; 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds 210f880374cSHerbert Xu static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) 2111da177e4SLinus Torvalds { 2121da177e4SLinus Torvalds struct sock *sk = skb->sk; 2131da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 21495ee6208SDaniel Borkmann struct flowi6 *fl6 = &transport->fl.u.ip6; 2158a9c58d2SXin Long __u8 tclass = np->tclass; 216c836a8baSEric Dumazet int res; 2171da177e4SLinus Torvalds 218bb33381dSDaniel Borkmann pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb, 21995ee6208SDaniel Borkmann skb->len, &fl6->saddr, &fl6->daddr); 2201da177e4SLinus Torvalds 2218a9c58d2SXin Long if (transport->dscp & SCTP_DSCP_SET_MASK) 2228a9c58d2SXin Long tclass = transport->dscp & SCTP_DSCP_VAL_MASK; 2238a9c58d2SXin Long 2248a9c58d2SXin Long if (INET_ECN_is_capable(tclass)) 22595ee6208SDaniel Borkmann IP6_ECN_flow_xmit(sk, fl6->flowlabel); 2261da177e4SLinus Torvalds 227f880374cSHerbert Xu if (!(transport->param_flags & SPP_PMTUD_ENABLE)) 22860ff7467SWANG Cong skb->ignore_df = 1; 229f880374cSHerbert Xu 23095ee6208SDaniel Borkmann SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS); 23195ee6208SDaniel Borkmann 232c836a8baSEric Dumazet rcu_read_lock(); 23392e55f41SPablo Neira res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt), 2348a9c58d2SXin Long tclass); 235c836a8baSEric Dumazet rcu_read_unlock(); 236c836a8baSEric Dumazet return res; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds /* Returns the dst cache entry for the given source and destination ip 2401da177e4SLinus Torvalds * addresses. 2411da177e4SLinus Torvalds */ 242da0420beSVlad Yasevich static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, 243da0420beSVlad Yasevich struct flowi *fl, struct sock *sk) 2441da177e4SLinus Torvalds { 245da0420beSVlad Yasevich struct sctp_association *asoc = t->asoc; 24662503411SWeixing Shi struct dst_entry *dst = NULL; 2479914ae3cSVlad Yasevich struct flowi6 *fl6 = &fl->u.ip6; 24862503411SWeixing Shi struct sctp_bind_addr *bp; 24995ee6208SDaniel Borkmann struct ipv6_pinfo *np = inet6_sk(sk); 25062503411SWeixing Shi struct sctp_sockaddr_entry *laddr; 251da0420beSVlad Yasevich union sctp_addr *daddr = &t->ipaddr; 2529914ae3cSVlad Yasevich union sctp_addr dst_saddr; 25395ee6208SDaniel Borkmann struct in6_addr *final_p, final; 2541c662018SXin Long enum sctp_scope scope; 25562503411SWeixing Shi __u8 matchlen = 0; 2561da177e4SLinus Torvalds 2579914ae3cSVlad Yasevich memset(fl6, 0, sizeof(struct flowi6)); 2584e3fd7a0SAlexey Dobriyan fl6->daddr = daddr->v6.sin6_addr; 2599c6a02f4SVlad Yasevich fl6->fl6_dport = daddr->v6.sin6_port; 2609c6a02f4SVlad Yasevich fl6->flowi6_proto = IPPROTO_SCTP; 2611da177e4SLinus Torvalds if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 2629914ae3cSVlad Yasevich fl6->flowi6_oif = daddr->v6.sin6_scope_id; 26325e7f2deSZheng Li else if (asoc) 26425e7f2deSZheng Li fl6->flowi6_oif = asoc->base.sk->sk_bound_dev_if; 2658a9c58d2SXin Long if (t->flowlabel & SCTP_FLOWLABEL_SET_MASK) 2668a9c58d2SXin Long fl6->flowlabel = htonl(t->flowlabel & SCTP_FLOWLABEL_VAL_MASK); 2671da177e4SLinus Torvalds 2680999f021SXin Long if (np->sndflow && (fl6->flowlabel & IPV6_FLOWLABEL_MASK)) { 2690999f021SXin Long struct ip6_flowlabel *flowlabel; 2700999f021SXin Long 2710999f021SXin Long flowlabel = fl6_sock_lookup(sk, fl6->flowlabel); 2720999f021SXin Long if (!flowlabel) 2730999f021SXin Long goto out; 2740999f021SXin Long fl6_sock_release(flowlabel); 2750999f021SXin Long } 2760999f021SXin Long 277bb33381dSDaniel Borkmann pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr); 2781da177e4SLinus Torvalds 2799c6a02f4SVlad Yasevich if (asoc) 2809c6a02f4SVlad Yasevich fl6->fl6_sport = htons(asoc->base.bind_addr.port); 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds if (saddr) { 2834e3fd7a0SAlexey Dobriyan fl6->saddr = saddr->v6.sin6_addr; 2849c6a02f4SVlad Yasevich fl6->fl6_sport = saddr->v6.sin6_port; 285bb33381dSDaniel Borkmann 286bb33381dSDaniel Borkmann pr_debug("src=%pI6 - ", &fl6->saddr); 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 289c836a8baSEric Dumazet rcu_read_lock(); 290c836a8baSEric Dumazet final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); 291c836a8baSEric Dumazet rcu_read_unlock(); 292c836a8baSEric Dumazet 2930e0d44abSSteffen Klassert dst = ip6_dst_lookup_flow(sk, fl6, final_p); 29462503411SWeixing Shi if (!asoc || saddr) 29562503411SWeixing Shi goto out; 29662503411SWeixing Shi 29762503411SWeixing Shi bp = &asoc->base.bind_addr; 29862503411SWeixing Shi scope = sctp_scope(daddr); 2999914ae3cSVlad Yasevich /* ip6_dst_lookup has filled in the fl6->saddr for us. Check 3009914ae3cSVlad Yasevich * to see if we can use it. 3019914ae3cSVlad Yasevich */ 3029c6a02f4SVlad Yasevich if (!IS_ERR(dst)) { 3039914ae3cSVlad Yasevich /* Walk through the bind address list and look for a bind 3049914ae3cSVlad Yasevich * address that matches the source address of the returned dst. 3059914ae3cSVlad Yasevich */ 3069914ae3cSVlad Yasevich sctp_v6_to_addr(&dst_saddr, &fl6->saddr, htons(bp->port)); 3079914ae3cSVlad Yasevich rcu_read_lock(); 3089914ae3cSVlad Yasevich list_for_each_entry_rcu(laddr, &bp->address_list, list) { 309fecda034SDaniel Borkmann if (!laddr->valid || laddr->state == SCTP_ADDR_DEL || 310fecda034SDaniel Borkmann (laddr->state != SCTP_ADDR_SRC && 311fecda034SDaniel Borkmann !asoc->src_out_of_asoc_ok)) 3129914ae3cSVlad Yasevich continue; 3139914ae3cSVlad Yasevich 3149914ae3cSVlad Yasevich /* Do not compare against v4 addrs */ 3159914ae3cSVlad Yasevich if ((laddr->a.sa.sa_family == AF_INET6) && 3169914ae3cSVlad Yasevich (sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) { 3179914ae3cSVlad Yasevich rcu_read_unlock(); 3189914ae3cSVlad Yasevich goto out; 3199914ae3cSVlad Yasevich } 3209914ae3cSVlad Yasevich } 3219914ae3cSVlad Yasevich rcu_read_unlock(); 3229914ae3cSVlad Yasevich /* None of the bound addresses match the source address of the 3239914ae3cSVlad Yasevich * dst. So release it. 3249914ae3cSVlad Yasevich */ 3259914ae3cSVlad Yasevich dst_release(dst); 3269914ae3cSVlad Yasevich dst = NULL; 3279914ae3cSVlad Yasevich } 3289914ae3cSVlad Yasevich 3299914ae3cSVlad Yasevich /* Walk through the bind address list and try to get the 3309914ae3cSVlad Yasevich * best source address for a given destination. 33162503411SWeixing Shi */ 33262503411SWeixing Shi rcu_read_lock(); 33362503411SWeixing Shi list_for_each_entry_rcu(laddr, &bp->address_list, list) { 334dbc2b5e9SXin Long struct dst_entry *bdst; 335dbc2b5e9SXin Long __u8 bmatchlen; 336dbc2b5e9SXin Long 337dbc2b5e9SXin Long if (!laddr->valid || 338dbc2b5e9SXin Long laddr->state != SCTP_ADDR_SRC || 339dbc2b5e9SXin Long laddr->a.sa.sa_family != AF_INET6 || 340dbc2b5e9SXin Long scope > sctp_scope(&laddr->a)) 34162503411SWeixing Shi continue; 342dbc2b5e9SXin Long 343dbc2b5e9SXin Long fl6->saddr = laddr->a.v6.sin6_addr; 344dbc2b5e9SXin Long fl6->fl6_sport = laddr->a.v6.sin6_port; 345c836a8baSEric Dumazet final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); 346dbc2b5e9SXin Long bdst = ip6_dst_lookup_flow(sk, fl6, final_p); 347dbc2b5e9SXin Long 348957d761cSAlexey Kodanev if (IS_ERR(bdst)) 349957d761cSAlexey Kodanev continue; 350957d761cSAlexey Kodanev 351957d761cSAlexey Kodanev if (ipv6_chk_addr(dev_net(bdst->dev), 352dbc2b5e9SXin Long &laddr->a.v6.sin6_addr, bdst->dev, 1)) { 353dbc2b5e9SXin Long if (!IS_ERR_OR_NULL(dst)) 354dbc2b5e9SXin Long dst_release(dst); 355dbc2b5e9SXin Long dst = bdst; 356dbc2b5e9SXin Long break; 357dbc2b5e9SXin Long } 358dbc2b5e9SXin Long 359dbc2b5e9SXin Long bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); 360957d761cSAlexey Kodanev if (matchlen > bmatchlen) { 361957d761cSAlexey Kodanev dst_release(bdst); 362dbc2b5e9SXin Long continue; 363957d761cSAlexey Kodanev } 364dbc2b5e9SXin Long 365dbc2b5e9SXin Long if (!IS_ERR_OR_NULL(dst)) 366dbc2b5e9SXin Long dst_release(dst); 367dbc2b5e9SXin Long dst = bdst; 368dbc2b5e9SXin Long matchlen = bmatchlen; 36962503411SWeixing Shi } 37069ce6487SEric Dumazet rcu_read_unlock(); 3719914ae3cSVlad Yasevich 37262503411SWeixing Shi out: 373ee3f34e8STommi Rantala if (!IS_ERR_OR_NULL(dst)) { 3741da177e4SLinus Torvalds struct rt6_info *rt; 375bb33381dSDaniel Borkmann 3761da177e4SLinus Torvalds rt = (struct rt6_info *)dst; 377da0420beSVlad Yasevich t->dst = dst; 378b197df4fSMartin KaFai Lau t->dst_cookie = rt6_get_cookie(rt); 379fd0273d7SMartin KaFai Lau pr_debug("rt6_dst:%pI6/%d rt6_src:%pI6\n", 380fd0273d7SMartin KaFai Lau &rt->rt6i_dst.addr, rt->rt6i_dst.plen, 381bb33381dSDaniel Borkmann &fl6->saddr); 382da0420beSVlad Yasevich } else { 383da0420beSVlad Yasevich t->dst = NULL; 384bb33381dSDaniel Borkmann 385bb33381dSDaniel Borkmann pr_debug("no route\n"); 386da0420beSVlad Yasevich } 3874251320fSVille Nuorvala } 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds /* Returns the number of consecutive initial bits that match in the 2 ipv6 3901da177e4SLinus Torvalds * addresses. 3911da177e4SLinus Torvalds */ 3921da177e4SLinus Torvalds static inline int sctp_v6_addr_match_len(union sctp_addr *s1, 3931da177e4SLinus Torvalds union sctp_addr *s2) 3941da177e4SLinus Torvalds { 395de7737e0SYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr); 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds /* Fills in the source address(saddr) based on the destination address(daddr) 3991da177e4SLinus Torvalds * and asoc's bind address list. 4001da177e4SLinus Torvalds */ 401e5117101SYOSHIFUJI Hideaki static void sctp_v6_get_saddr(struct sctp_sock *sk, 4029914ae3cSVlad Yasevich struct sctp_transport *t, 4039914ae3cSVlad Yasevich struct flowi *fl) 4041da177e4SLinus Torvalds { 4059914ae3cSVlad Yasevich struct flowi6 *fl6 = &fl->u.ip6; 4069914ae3cSVlad Yasevich union sctp_addr *saddr = &t->saddr; 4071da177e4SLinus Torvalds 408bb33381dSDaniel Borkmann pr_debug("%s: asoc:%p dst:%p\n", __func__, t->asoc, t->dst); 4091da177e4SLinus Torvalds 4109914ae3cSVlad Yasevich if (t->dst) { 4119914ae3cSVlad Yasevich saddr->v6.sin6_family = AF_INET6; 4124e3fd7a0SAlexey Dobriyan saddr->v6.sin6_addr = fl6->saddr; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds /* Make a copy of all potential local addresses. */ 4171da177e4SLinus Torvalds static void sctp_v6_copy_addrlist(struct list_head *addrlist, 4181da177e4SLinus Torvalds struct net_device *dev) 4191da177e4SLinus Torvalds { 4201da177e4SLinus Torvalds struct inet6_dev *in6_dev; 4211da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 4221da177e4SLinus Torvalds struct sctp_sockaddr_entry *addr; 4231da177e4SLinus Torvalds 4248814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 4251da177e4SLinus Torvalds if ((in6_dev = __in6_dev_get(dev)) == NULL) { 4268814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 4271da177e4SLinus Torvalds return; 4281da177e4SLinus Torvalds } 4291da177e4SLinus Torvalds 430e2eb8d45SJarek Poplawski read_lock_bh(&in6_dev->lock); 431502a2ffdSstephen hemminger list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 4321da177e4SLinus Torvalds /* Add the address to the local list. */ 433939cfa75SDaniel Borkmann addr = kzalloc(sizeof(*addr), GFP_ATOMIC); 4341da177e4SLinus Torvalds if (addr) { 4352a6fd78aSAl Viro addr->a.v6.sin6_family = AF_INET6; 4362a6fd78aSAl Viro addr->a.v6.sin6_port = 0; 4374e3fd7a0SAlexey Dobriyan addr->a.v6.sin6_addr = ifp->addr; 4382a6fd78aSAl Viro addr->a.v6.sin6_scope_id = dev->ifindex; 43929303547SVlad Yasevich addr->valid = 1; 4401da177e4SLinus Torvalds INIT_LIST_HEAD(&addr->list); 4411da177e4SLinus Torvalds list_add_tail(&addr->list, addrlist); 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds 445e2eb8d45SJarek Poplawski read_unlock_bh(&in6_dev->lock); 4468814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 4471da177e4SLinus Torvalds } 4481da177e4SLinus Torvalds 449b7e10c25SRichard Haines /* Copy over any ip options */ 450b7e10c25SRichard Haines static void sctp_v6_copy_ip_options(struct sock *sk, struct sock *newsk) 451b7e10c25SRichard Haines { 452b7e10c25SRichard Haines struct ipv6_pinfo *newnp, *np = inet6_sk(sk); 453b7e10c25SRichard Haines struct ipv6_txoptions *opt; 454b7e10c25SRichard Haines 455b7e10c25SRichard Haines newnp = inet6_sk(newsk); 456b7e10c25SRichard Haines 457b7e10c25SRichard Haines rcu_read_lock(); 458b7e10c25SRichard Haines opt = rcu_dereference(np->opt); 459b7e10c25SRichard Haines if (opt) { 460b7e10c25SRichard Haines opt = ipv6_dup_options(newsk, opt); 461b7e10c25SRichard Haines if (!opt) 462b7e10c25SRichard Haines pr_err("%s: Failed to copy ip options\n", __func__); 463b7e10c25SRichard Haines } 464b7e10c25SRichard Haines RCU_INIT_POINTER(newnp->opt, opt); 465b7e10c25SRichard Haines rcu_read_unlock(); 466b7e10c25SRichard Haines } 467b7e10c25SRichard Haines 468b7e10c25SRichard Haines /* Account for the IP options */ 469b7e10c25SRichard Haines static int sctp_v6_ip_options_len(struct sock *sk) 470b7e10c25SRichard Haines { 471b7e10c25SRichard Haines struct ipv6_pinfo *np = inet6_sk(sk); 472b7e10c25SRichard Haines struct ipv6_txoptions *opt; 473b7e10c25SRichard Haines int len = 0; 474b7e10c25SRichard Haines 475b7e10c25SRichard Haines rcu_read_lock(); 476b7e10c25SRichard Haines opt = rcu_dereference(np->opt); 477b7e10c25SRichard Haines if (opt) 478b7e10c25SRichard Haines len = opt->opt_flen + opt->opt_nflen; 479b7e10c25SRichard Haines 480b7e10c25SRichard Haines rcu_read_unlock(); 481b7e10c25SRichard Haines return len; 482b7e10c25SRichard Haines } 483b7e10c25SRichard Haines 4841da177e4SLinus Torvalds /* Initialize a sockaddr_storage from in incoming skb. */ 4851da177e4SLinus Torvalds static void sctp_v6_from_skb(union sctp_addr *addr, struct sk_buff *skb, 4861da177e4SLinus Torvalds int is_saddr) 4871da177e4SLinus Torvalds { 4880630c56eSMarcelo Ricardo Leitner /* Always called on head skb, so this is safe */ 4890630c56eSMarcelo Ricardo Leitner struct sctphdr *sh = sctp_hdr(skb); 4900630c56eSMarcelo Ricardo Leitner struct sockaddr_in6 *sa = &addr->v6; 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 4931da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* FIXME */ 4941da177e4SLinus Torvalds addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds if (is_saddr) { 4970630c56eSMarcelo Ricardo Leitner sa->sin6_port = sh->source; 4980630c56eSMarcelo Ricardo Leitner sa->sin6_addr = ipv6_hdr(skb)->saddr; 4991da177e4SLinus Torvalds } else { 5000630c56eSMarcelo Ricardo Leitner sa->sin6_port = sh->dest; 5010630c56eSMarcelo Ricardo Leitner sa->sin6_addr = ipv6_hdr(skb)->daddr; 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds /* Initialize an sctp_addr from a socket. */ 5061da177e4SLinus Torvalds static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) 5071da177e4SLinus Torvalds { 5081da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5097dcdbd95SAl Viro addr->v6.sin6_port = 0; 510efe4208fSEric Dumazet addr->v6.sin6_addr = sk->sk_v6_rcv_saddr; 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds /* Initialize sk->sk_rcv_saddr from sctp_addr. */ 5141da177e4SLinus Torvalds static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) 5151da177e4SLinus Torvalds { 516299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) { 517efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[0] = 0; 518efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[1] = 0; 519efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); 520efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[3] = 5211da177e4SLinus Torvalds addr->v4.sin_addr.s_addr; 5221da177e4SLinus Torvalds } else { 523efe4208fSEric Dumazet sk->sk_v6_rcv_saddr = addr->v6.sin6_addr; 5241da177e4SLinus Torvalds } 5251da177e4SLinus Torvalds } 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds /* Initialize sk->sk_daddr from sctp_addr. */ 5281da177e4SLinus Torvalds static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) 5291da177e4SLinus Torvalds { 530299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) { 531efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[0] = 0; 532efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[1] = 0; 533efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[2] = htonl(0x0000ffff); 534efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; 5351da177e4SLinus Torvalds } else { 536efe4208fSEric Dumazet sk->sk_v6_daddr = addr->v6.sin6_addr; 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds /* Initialize a sctp_addr from an address parameter. */ 5411da177e4SLinus Torvalds static void sctp_v6_from_addr_param(union sctp_addr *addr, 5421da177e4SLinus Torvalds union sctp_addr_param *param, 543dd86d136SAl Viro __be16 port, int iif) 5441da177e4SLinus Torvalds { 5451da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5461da177e4SLinus Torvalds addr->v6.sin6_port = port; 5471da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* BUG */ 5484e3fd7a0SAlexey Dobriyan addr->v6.sin6_addr = param->v6.addr; 5491da177e4SLinus Torvalds addr->v6.sin6_scope_id = iif; 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds /* Initialize an address parameter from a sctp_addr and return the length 5531da177e4SLinus Torvalds * of the address parameter. 5541da177e4SLinus Torvalds */ 5551da177e4SLinus Torvalds static int sctp_v6_to_addr_param(const union sctp_addr *addr, 5561da177e4SLinus Torvalds union sctp_addr_param *param) 5571da177e4SLinus Torvalds { 55800987cc0SXin Long int length = sizeof(struct sctp_ipv6addr_param); 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; 561dbc16db1SAl Viro param->v6.param_hdr.length = htons(length); 5624e3fd7a0SAlexey Dobriyan param->v6.addr = addr->v6.sin6_addr; 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds return length; 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5679914ae3cSVlad Yasevich /* Initialize a sctp_addr from struct in6_addr. */ 5689914ae3cSVlad Yasevich static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, 569854d43a4SAl Viro __be16 port) 5701da177e4SLinus Torvalds { 5711da177e4SLinus Torvalds addr->sa.sa_family = AF_INET6; 5721da177e4SLinus Torvalds addr->v6.sin6_port = port; 57315339e44SAlexander Potapenko addr->v6.sin6_flowinfo = 0; 5744e3fd7a0SAlexey Dobriyan addr->v6.sin6_addr = *saddr; 57515339e44SAlexander Potapenko addr->v6.sin6_scope_id = 0; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds 5781071ec9dSXin Long static int __sctp_v6_cmp_addr(const union sctp_addr *addr1, 5791071ec9dSXin Long const union sctp_addr *addr2) 5801071ec9dSXin Long { 5811071ec9dSXin Long if (addr1->sa.sa_family != addr2->sa.sa_family) { 5821071ec9dSXin Long if (addr1->sa.sa_family == AF_INET && 5831071ec9dSXin Long addr2->sa.sa_family == AF_INET6 && 5841071ec9dSXin Long ipv6_addr_v4mapped(&addr2->v6.sin6_addr) && 5851071ec9dSXin Long addr2->v6.sin6_addr.s6_addr32[3] == 5861071ec9dSXin Long addr1->v4.sin_addr.s_addr) 5871071ec9dSXin Long return 1; 5881071ec9dSXin Long 5891071ec9dSXin Long if (addr2->sa.sa_family == AF_INET && 5901071ec9dSXin Long addr1->sa.sa_family == AF_INET6 && 5911071ec9dSXin Long ipv6_addr_v4mapped(&addr1->v6.sin6_addr) && 5921071ec9dSXin Long addr1->v6.sin6_addr.s6_addr32[3] == 5931071ec9dSXin Long addr2->v4.sin_addr.s_addr) 5941071ec9dSXin Long return 1; 5951071ec9dSXin Long 5961071ec9dSXin Long return 0; 5971071ec9dSXin Long } 5981071ec9dSXin Long 5991071ec9dSXin Long if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) 6001071ec9dSXin Long return 0; 6011071ec9dSXin Long 6021071ec9dSXin Long /* If this is a linklocal address, compare the scope_id. */ 6031071ec9dSXin Long if ((ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) && 6041071ec9dSXin Long addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && 6051071ec9dSXin Long addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id) 6061071ec9dSXin Long return 0; 6071071ec9dSXin Long 6081071ec9dSXin Long return 1; 6091071ec9dSXin Long } 6101071ec9dSXin Long 6111da177e4SLinus Torvalds /* Compare addresses exactly. 6121da177e4SLinus Torvalds * v4-mapped-v6 is also in consideration. 6131da177e4SLinus Torvalds */ 6141da177e4SLinus Torvalds static int sctp_v6_cmp_addr(const union sctp_addr *addr1, 6151da177e4SLinus Torvalds const union sctp_addr *addr2) 6161da177e4SLinus Torvalds { 6171071ec9dSXin Long return __sctp_v6_cmp_addr(addr1, addr2) && 6181071ec9dSXin Long addr1->v6.sin6_port == addr2->v6.sin6_port; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds /* Initialize addr struct to INADDR_ANY. */ 6226fbfa9f9SAl Viro static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds memset(addr, 0x00, sizeof(union sctp_addr)); 6251da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 6261da177e4SLinus Torvalds addr->v6.sin6_port = port; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds /* Is this a wildcard address? */ 6301da177e4SLinus Torvalds static int sctp_v6_is_any(const union sctp_addr *addr) 6311da177e4SLinus Torvalds { 632b9b9e10fSBrian Haley return ipv6_addr_any(&addr->v6.sin6_addr); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds /* Should this be available for binding? */ 6361da177e4SLinus Torvalds static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) 6371da177e4SLinus Torvalds { 6381da177e4SLinus Torvalds int type; 6399b974202SXin Long struct net *net = sock_net(&sp->inet.sk); 640b71d1d42SEric Dumazet const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds type = ipv6_addr_type(in6); 6431da177e4SLinus Torvalds if (IPV6_ADDR_ANY == type) 6441da177e4SLinus Torvalds return 1; 6451da177e4SLinus Torvalds if (type == IPV6_ADDR_MAPPED) { 6461da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 6471da177e4SLinus Torvalds return 0; 6481da177e4SLinus Torvalds sctp_v6_map_v4(addr); 6491da177e4SLinus Torvalds return sctp_get_af_specific(AF_INET)->available(addr, sp); 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds if (!(type & IPV6_ADDR_UNICAST)) 6521da177e4SLinus Torvalds return 0; 6531da177e4SLinus Torvalds 6549b974202SXin Long return sp->inet.freebind || net->ipv6.sysctl.ip_nonlocal_bind || 6559b974202SXin Long ipv6_chk_addr(net, in6, NULL, 0); 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds 6581da177e4SLinus Torvalds /* This function checks if the address is a valid address to be used for 6591da177e4SLinus Torvalds * SCTP. 6601da177e4SLinus Torvalds * 6611da177e4SLinus Torvalds * Output: 6621da177e4SLinus Torvalds * Return 0 - If the address is a non-unicast or an illegal address. 6631da177e4SLinus Torvalds * Return 1 - If the address is a unicast. 6641da177e4SLinus Torvalds */ 6655636bef7SVlad Yasevich static int sctp_v6_addr_valid(union sctp_addr *addr, 6665636bef7SVlad Yasevich struct sctp_sock *sp, 6675636bef7SVlad Yasevich const struct sk_buff *skb) 6681da177e4SLinus Torvalds { 6691da177e4SLinus Torvalds int ret = ipv6_addr_type(&addr->v6.sin6_addr); 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds /* Support v4-mapped-v6 address. */ 6721da177e4SLinus Torvalds if (ret == IPV6_ADDR_MAPPED) { 6731da177e4SLinus Torvalds /* Note: This routine is used in input, so v4-mapped-v6 6741da177e4SLinus Torvalds * are disallowed here when there is no sctp_sock. 6751da177e4SLinus Torvalds */ 6761da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 6771da177e4SLinus Torvalds return 0; 6781da177e4SLinus Torvalds sctp_v6_map_v4(addr); 6795636bef7SVlad Yasevich return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds /* Is this a non-unicast address */ 6831da177e4SLinus Torvalds if (!(ret & IPV6_ADDR_UNICAST)) 6841da177e4SLinus Torvalds return 0; 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds return 1; 6871da177e4SLinus Torvalds } 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds /* What is the scope of 'addr'? */ 6901c662018SXin Long static enum sctp_scope sctp_v6_scope(union sctp_addr *addr) 6911da177e4SLinus Torvalds { 6921c662018SXin Long enum sctp_scope retval; 6931da177e4SLinus Torvalds int v6scope; 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds /* The IPv6 scope is really a set of bit fields. 6961da177e4SLinus Torvalds * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. 6971da177e4SLinus Torvalds */ 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); 7001da177e4SLinus Torvalds switch (v6scope) { 7011da177e4SLinus Torvalds case IFA_HOST: 7021da177e4SLinus Torvalds retval = SCTP_SCOPE_LOOPBACK; 7031da177e4SLinus Torvalds break; 7041da177e4SLinus Torvalds case IFA_LINK: 7051da177e4SLinus Torvalds retval = SCTP_SCOPE_LINK; 7061da177e4SLinus Torvalds break; 7071da177e4SLinus Torvalds case IFA_SITE: 7081da177e4SLinus Torvalds retval = SCTP_SCOPE_PRIVATE; 7091da177e4SLinus Torvalds break; 7101da177e4SLinus Torvalds default: 7111da177e4SLinus Torvalds retval = SCTP_SCOPE_GLOBAL; 7121da177e4SLinus Torvalds break; 7133ff50b79SStephen Hemminger } 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds return retval; 7161da177e4SLinus Torvalds } 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds /* Create and initialize a new sk for the socket to be returned by accept(). */ 7191da177e4SLinus Torvalds static struct sock *sctp_v6_create_accept_sk(struct sock *sk, 720cdfbabfbSDavid Howells struct sctp_association *asoc, 721cdfbabfbSDavid Howells bool kern) 7221da177e4SLinus Torvalds { 7231da177e4SLinus Torvalds struct sock *newsk; 7241da177e4SLinus Torvalds struct ipv6_pinfo *newnp, *np = inet6_sk(sk); 7251da177e4SLinus Torvalds struct sctp6_sock *newsctp6sk; 7261da177e4SLinus Torvalds 727cdfbabfbSDavid Howells newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot, kern); 7281da177e4SLinus Torvalds if (!newsk) 7291da177e4SLinus Torvalds goto out; 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds sock_init_data(NULL, newsk); 7321da177e4SLinus Torvalds 733914e1c8bSVlad Yasevich sctp_copy_sock(newsk, sk, asoc); 7341da177e4SLinus Torvalds sock_reset_flag(sk, SOCK_ZAPPED); 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds newsctp6sk = (struct sctp6_sock *)newsk; 7371da177e4SLinus Torvalds inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; 7381da177e4SLinus Torvalds 739b225b884SDave Johnson sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; 740b225b884SDave Johnson 7411da177e4SLinus Torvalds newnp = inet6_sk(newsk); 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds memcpy(newnp, np, sizeof(struct ipv6_pinfo)); 744fdcee2cbSEric Dumazet newnp->ipv6_mc_list = NULL; 745fdcee2cbSEric Dumazet newnp->ipv6_ac_list = NULL; 746fdcee2cbSEric Dumazet newnp->ipv6_fl_list = NULL; 7471da177e4SLinus Torvalds 748b7e10c25SRichard Haines sctp_v6_copy_ip_options(sk, newsk); 7499470e24fSEric Dumazet 7501da177e4SLinus Torvalds /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() 7511da177e4SLinus Torvalds * and getpeername(). 7521da177e4SLinus Torvalds */ 7531da177e4SLinus Torvalds sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); 7541da177e4SLinus Torvalds 755661dbf34SMatija Glavinic Pecotic newsk->sk_v6_rcv_saddr = sk->sk_v6_rcv_saddr; 756661dbf34SMatija Glavinic Pecotic 757e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(newsk); 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds if (newsk->sk_prot->init(newsk)) { 7601da177e4SLinus Torvalds sk_common_release(newsk); 7611da177e4SLinus Torvalds newsk = NULL; 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds out: 7651da177e4SLinus Torvalds return newsk; 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds 768299ee123SJason Gunthorpe /* Format a sockaddr for return to user space. This makes sure the return is 769299ee123SJason Gunthorpe * AF_INET or AF_INET6 depending on the SCTP_I_WANT_MAPPED_V4_ADDR option. 770299ee123SJason Gunthorpe */ 771299ee123SJason Gunthorpe static int sctp_v6_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr) 7721da177e4SLinus Torvalds { 773299ee123SJason Gunthorpe if (sp->v4mapped) { 774299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) 7751da177e4SLinus Torvalds sctp_v4_map_v6(addr); 776299ee123SJason Gunthorpe } else { 777299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET6 && 778299ee123SJason Gunthorpe ipv6_addr_v4mapped(&addr->v6.sin6_addr)) 779299ee123SJason Gunthorpe sctp_v6_map_v4(addr); 780299ee123SJason Gunthorpe } 781299ee123SJason Gunthorpe 7826780db24SEric Dumazet if (addr->sa.sa_family == AF_INET) { 7836780db24SEric Dumazet memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero)); 784299ee123SJason Gunthorpe return sizeof(struct sockaddr_in); 7856780db24SEric Dumazet } 786299ee123SJason Gunthorpe return sizeof(struct sockaddr_in6); 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds /* Where did this skb come from? */ 7901da177e4SLinus Torvalds static int sctp_v6_skb_iif(const struct sk_buff *skb) 7911da177e4SLinus Torvalds { 7921f45f78fSMarcelo Ricardo Leitner return IP6CB(skb)->iif; 7931da177e4SLinus Torvalds } 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds /* Was this packet marked by Explicit Congestion Notification? */ 7961da177e4SLinus Torvalds static int sctp_v6_is_ce(const struct sk_buff *skb) 7971da177e4SLinus Torvalds { 798978aa047SXin Long return *((__u32 *)(ipv6_hdr(skb))) & (__force __u32)htonl(1 << 20); 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds /* Dump the v6 addr to the seq file. */ 8021da177e4SLinus Torvalds static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) 8031da177e4SLinus Torvalds { 8045b095d98SHarvey Harrison seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr); 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 807b9031d9dSVlad Yasevich static void sctp_v6_ecn_capable(struct sock *sk) 808b9031d9dSVlad Yasevich { 809b9031d9dSVlad Yasevich inet6_sk(sk)->tclass |= INET_ECN_ECT_0; 810b9031d9dSVlad Yasevich } 811b9031d9dSVlad Yasevich 8121da177e4SLinus Torvalds /* Initialize a PF_INET msgname from a ulpevent. */ 8131da177e4SLinus Torvalds static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, 8141da177e4SLinus Torvalds char *msgname, int *addrlen) 8151da177e4SLinus Torvalds { 8161da177e4SLinus Torvalds union sctp_addr *addr; 8171da177e4SLinus Torvalds struct sctp_association *asoc; 818299ee123SJason Gunthorpe union sctp_addr *paddr; 8191da177e4SLinus Torvalds 820299ee123SJason Gunthorpe if (!msgname) 8211da177e4SLinus Torvalds return; 822299ee123SJason Gunthorpe 823299ee123SJason Gunthorpe addr = (union sctp_addr *)msgname; 824299ee123SJason Gunthorpe asoc = event->asoc; 825299ee123SJason Gunthorpe paddr = &asoc->peer.primary_addr; 826299ee123SJason Gunthorpe 827299ee123SJason Gunthorpe if (paddr->sa.sa_family == AF_INET) { 828299ee123SJason Gunthorpe addr->v4.sin_family = AF_INET; 829299ee123SJason Gunthorpe addr->v4.sin_port = htons(asoc->peer.port); 830299ee123SJason Gunthorpe addr->v4.sin_addr = paddr->v4.sin_addr; 831299ee123SJason Gunthorpe } else { 832299ee123SJason Gunthorpe addr->v6.sin6_family = AF_INET6; 833299ee123SJason Gunthorpe addr->v6.sin6_flowinfo = 0; 834299ee123SJason Gunthorpe if (ipv6_addr_type(&paddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 835299ee123SJason Gunthorpe addr->v6.sin6_scope_id = paddr->v6.sin6_scope_id; 836299ee123SJason Gunthorpe else 837299ee123SJason Gunthorpe addr->v6.sin6_scope_id = 0; 838299ee123SJason Gunthorpe addr->v6.sin6_port = htons(asoc->peer.port); 839299ee123SJason Gunthorpe addr->v6.sin6_addr = paddr->v6.sin6_addr; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds 842299ee123SJason Gunthorpe *addrlen = sctp_v6_addr_to_user(sctp_sk(asoc->base.sk), addr); 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvalds /* Initialize a msg_name from an inbound skb. */ 8461da177e4SLinus Torvalds static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, 8471da177e4SLinus Torvalds int *addr_len) 8481da177e4SLinus Torvalds { 849299ee123SJason Gunthorpe union sctp_addr *addr; 8501da177e4SLinus Torvalds struct sctphdr *sh; 8511da177e4SLinus Torvalds 852299ee123SJason Gunthorpe if (!msgname) 8531da177e4SLinus Torvalds return; 854299ee123SJason Gunthorpe 855299ee123SJason Gunthorpe addr = (union sctp_addr *)msgname; 856299ee123SJason Gunthorpe sh = sctp_hdr(skb); 857299ee123SJason Gunthorpe 858299ee123SJason Gunthorpe if (ip_hdr(skb)->version == 4) { 859299ee123SJason Gunthorpe addr->v4.sin_family = AF_INET; 860299ee123SJason Gunthorpe addr->v4.sin_port = sh->source; 861299ee123SJason Gunthorpe addr->v4.sin_addr.s_addr = ip_hdr(skb)->saddr; 862299ee123SJason Gunthorpe } else { 863299ee123SJason Gunthorpe addr->v6.sin6_family = AF_INET6; 864299ee123SJason Gunthorpe addr->v6.sin6_flowinfo = 0; 865299ee123SJason Gunthorpe addr->v6.sin6_port = sh->source; 866299ee123SJason Gunthorpe addr->v6.sin6_addr = ipv6_hdr(skb)->saddr; 8677c8a61d9SEric W. Biederman if (ipv6_addr_type(&addr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 8681f45f78fSMarcelo Ricardo Leitner addr->v6.sin6_scope_id = sctp_v6_skb_iif(skb); 8697c8a61d9SEric W. Biederman else 8707c8a61d9SEric W. Biederman addr->v6.sin6_scope_id = 0; 8711da177e4SLinus Torvalds } 8721da177e4SLinus Torvalds 873299ee123SJason Gunthorpe *addr_len = sctp_v6_addr_to_user(sctp_sk(skb->sk), addr); 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds /* Do we support this AF? */ 8771da177e4SLinus Torvalds static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) 8781da177e4SLinus Torvalds { 8791da177e4SLinus Torvalds switch (family) { 8801da177e4SLinus Torvalds case AF_INET6: 8811da177e4SLinus Torvalds return 1; 8821da177e4SLinus Torvalds /* v4-mapped-v6 addresses */ 8831da177e4SLinus Torvalds case AF_INET: 8847dab83deSVlad Yasevich if (!__ipv6_only_sock(sctp_opt2sk(sp))) 8851da177e4SLinus Torvalds return 1; 88637f47bc9SMarcelo Ricardo Leitner /* fallthru */ 8871da177e4SLinus Torvalds default: 8881da177e4SLinus Torvalds return 0; 8891da177e4SLinus Torvalds } 8901da177e4SLinus Torvalds } 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds /* Address matching with wildcards allowed. This extra level 8931da177e4SLinus Torvalds * of indirection lets us choose whether a PF_INET6 should 8941da177e4SLinus Torvalds * disallow any v4 addresses if we so choose. 8951da177e4SLinus Torvalds */ 8961da177e4SLinus Torvalds static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, 8971da177e4SLinus Torvalds const union sctp_addr *addr2, 8981da177e4SLinus Torvalds struct sctp_sock *opt) 8991da177e4SLinus Torvalds { 90052cae8f0SVlad Yasevich struct sock *sk = sctp_opt2sk(opt); 9011071ec9dSXin Long struct sctp_af *af1, *af2; 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds af1 = sctp_get_af_specific(addr1->sa.sa_family); 9041da177e4SLinus Torvalds af2 = sctp_get_af_specific(addr2->sa.sa_family); 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds if (!af1 || !af2) 9071da177e4SLinus Torvalds return 0; 9087dab83deSVlad Yasevich 9097dab83deSVlad Yasevich /* If the socket is IPv6 only, v4 addrs will not match */ 91052cae8f0SVlad Yasevich if (__ipv6_only_sock(sk) && af1 != af2) 9117dab83deSVlad Yasevich return 0; 9127dab83deSVlad Yasevich 9131da177e4SLinus Torvalds /* Today, wildcard AF_INET/AF_INET6. */ 91452cae8f0SVlad Yasevich if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) 9151da177e4SLinus Torvalds return 1; 9161da177e4SLinus Torvalds 917d625329bSXin Long if (addr1->sa.sa_family == AF_INET && addr2->sa.sa_family == AF_INET) 918d625329bSXin Long return addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr; 919d625329bSXin Long 9201071ec9dSXin Long return __sctp_v6_cmp_addr(addr1, addr2); 9211da177e4SLinus Torvalds } 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds /* Verify that the provided sockaddr looks bindable. Common verification, 9241da177e4SLinus Torvalds * has already been taken care of. 9251da177e4SLinus Torvalds */ 9261da177e4SLinus Torvalds static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) 9271da177e4SLinus Torvalds { 9281da177e4SLinus Torvalds struct sctp_af *af; 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 9311da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 9321da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 9331da177e4SLinus Torvalds else { 9341da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 9356a6ddb2aSSridhar Samudrala struct net_device *dev; 9361da177e4SLinus Torvalds 9376a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 938bb2db45bSEric W. Biederman struct net *net; 9396a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 9401da177e4SLinus Torvalds return 0; 941bb2db45bSEric W. Biederman net = sock_net(&opt->inet.sk); 94240c9c31eSEric Dumazet rcu_read_lock(); 943bb2db45bSEric W. Biederman dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id); 944b71d21c2SLaszlo Toth if (!dev || !(opt->inet.freebind || 945b71d21c2SLaszlo Toth net->ipv6.sysctl.ip_nonlocal_bind || 946b71d21c2SLaszlo Toth ipv6_chk_addr(net, &addr->v6.sin6_addr, 947b71d21c2SLaszlo Toth dev, 0))) { 94840c9c31eSEric Dumazet rcu_read_unlock(); 9491669d857SVlad Yasevich return 0; 9501669d857SVlad Yasevich } 95140c9c31eSEric Dumazet rcu_read_unlock(); 9521da177e4SLinus Torvalds } 9537dab83deSVlad Yasevich 9541da177e4SLinus Torvalds af = opt->pf->af; 9551da177e4SLinus Torvalds } 9561da177e4SLinus Torvalds return af->available(addr, opt); 9571da177e4SLinus Torvalds } 9581da177e4SLinus Torvalds 9596a6ddb2aSSridhar Samudrala /* Verify that the provided sockaddr looks sendable. Common verification, 9601da177e4SLinus Torvalds * has already been taken care of. 9611da177e4SLinus Torvalds */ 9621da177e4SLinus Torvalds static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) 9631da177e4SLinus Torvalds { 9641da177e4SLinus Torvalds struct sctp_af *af = NULL; 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 9671da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 9681da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 9691da177e4SLinus Torvalds else { 9701da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 9716a6ddb2aSSridhar Samudrala struct net_device *dev; 9721da177e4SLinus Torvalds 9736a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 9746a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 9751da177e4SLinus Torvalds return 0; 97640c9c31eSEric Dumazet rcu_read_lock(); 977bb2db45bSEric W. Biederman dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk), 97840c9c31eSEric Dumazet addr->v6.sin6_scope_id); 97940c9c31eSEric Dumazet rcu_read_unlock(); 9806a6ddb2aSSridhar Samudrala if (!dev) 9816a6ddb2aSSridhar Samudrala return 0; 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds af = opt->pf->af; 9841da177e4SLinus Torvalds } 9851da177e4SLinus Torvalds 9861da177e4SLinus Torvalds return af != NULL; 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds /* Fill in Supported Address Type information for INIT and INIT-ACK 9901da177e4SLinus Torvalds * chunks. Note: In the future, we may want to look at sock options 9911da177e4SLinus Torvalds * to determine whether a PF_INET6 socket really wants to have IPV4 9921da177e4SLinus Torvalds * addresses. 9931da177e4SLinus Torvalds * Returns number of addresses supported. 9941da177e4SLinus Torvalds */ 9951da177e4SLinus Torvalds static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, 9963dbe8656SAl Viro __be16 *types) 9971da177e4SLinus Torvalds { 9987dab83deSVlad Yasevich types[0] = SCTP_PARAM_IPV6_ADDRESS; 9997dab83deSVlad Yasevich if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { 10007dab83deSVlad Yasevich types[1] = SCTP_PARAM_IPV4_ADDRESS; 10011da177e4SLinus Torvalds return 2; 10021da177e4SLinus Torvalds } 10037dab83deSVlad Yasevich return 1; 10047dab83deSVlad Yasevich } 10051da177e4SLinus Torvalds 1006299ee123SJason Gunthorpe /* Handle SCTP_I_WANT_MAPPED_V4_ADDR for getpeername() and getsockname() */ 1007299ee123SJason Gunthorpe static int sctp_getname(struct socket *sock, struct sockaddr *uaddr, 10089b2c45d4SDenys Vlasenko int peer) 1009299ee123SJason Gunthorpe { 1010299ee123SJason Gunthorpe int rc; 1011299ee123SJason Gunthorpe 10129b2c45d4SDenys Vlasenko rc = inet6_getname(sock, uaddr, peer); 1013299ee123SJason Gunthorpe 10149b2c45d4SDenys Vlasenko if (rc < 0) 1015299ee123SJason Gunthorpe return rc; 1016299ee123SJason Gunthorpe 10179b2c45d4SDenys Vlasenko rc = sctp_v6_addr_to_user(sctp_sk(sock->sk), 1018299ee123SJason Gunthorpe (union sctp_addr *)uaddr); 1019299ee123SJason Gunthorpe 1020299ee123SJason Gunthorpe return rc; 1021299ee123SJason Gunthorpe } 1022299ee123SJason Gunthorpe 102390ddc4f0SEric Dumazet static const struct proto_ops inet6_seqpacket_ops = { 10241da177e4SLinus Torvalds .family = PF_INET6, 10251da177e4SLinus Torvalds .owner = THIS_MODULE, 10261da177e4SLinus Torvalds .release = inet6_release, 10271da177e4SLinus Torvalds .bind = inet6_bind, 1028644fbdeaSXin Long .connect = sctp_inet_connect, 10291da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 10301da177e4SLinus Torvalds .accept = inet_accept, 1031299ee123SJason Gunthorpe .getname = sctp_getname, 1032a11e1d43SLinus Torvalds .poll = sctp_poll, 10331da177e4SLinus Torvalds .ioctl = inet6_ioctl, 10341da177e4SLinus Torvalds .listen = sctp_inet_listen, 10351da177e4SLinus Torvalds .shutdown = inet_shutdown, 10361da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 10371da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 1038543d9cfeSArnaldo Carvalho de Melo .sendmsg = inet_sendmsg, 1039fd2d180aSXin Long .recvmsg = inet_recvmsg, 1040543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 10413fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 10423fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 10433fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 10443fdadf7dSDmitry Mishin #endif 10451da177e4SLinus Torvalds }; 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds static struct inet_protosw sctpv6_seqpacket_protosw = { 10481da177e4SLinus Torvalds .type = SOCK_SEQPACKET, 10491da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 10501da177e4SLinus Torvalds .prot = &sctpv6_prot, 10511da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 10521da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG 10531da177e4SLinus Torvalds }; 10541da177e4SLinus Torvalds static struct inet_protosw sctpv6_stream_protosw = { 10551da177e4SLinus Torvalds .type = SOCK_STREAM, 10561da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 10571da177e4SLinus Torvalds .prot = &sctpv6_prot, 10581da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 10591da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG, 10601da177e4SLinus Torvalds }; 10611da177e4SLinus Torvalds 1062e5bbef20SHerbert Xu static int sctp6_rcv(struct sk_buff *skb) 10631da177e4SLinus Torvalds { 1064e5bbef20SHerbert Xu return sctp_rcv(skb) ? -1 : 0; 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds 106741135cc8SAlexey Dobriyan static const struct inet6_protocol sctpv6_protocol = { 10681da177e4SLinus Torvalds .handler = sctp6_rcv, 10691da177e4SLinus Torvalds .err_handler = sctp_v6_err, 10701da177e4SLinus Torvalds .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, 10711da177e4SLinus Torvalds }; 10721da177e4SLinus Torvalds 107315efbe76SNeil Horman static struct sctp_af sctp_af_inet6 = { 1074543d9cfeSArnaldo Carvalho de Melo .sa_family = AF_INET6, 10751da177e4SLinus Torvalds .sctp_xmit = sctp_v6_xmit, 10761da177e4SLinus Torvalds .setsockopt = ipv6_setsockopt, 10771da177e4SLinus Torvalds .getsockopt = ipv6_getsockopt, 10781da177e4SLinus Torvalds .get_dst = sctp_v6_get_dst, 10791da177e4SLinus Torvalds .get_saddr = sctp_v6_get_saddr, 10801da177e4SLinus Torvalds .copy_addrlist = sctp_v6_copy_addrlist, 10811da177e4SLinus Torvalds .from_skb = sctp_v6_from_skb, 10821da177e4SLinus Torvalds .from_sk = sctp_v6_from_sk, 10831da177e4SLinus Torvalds .from_addr_param = sctp_v6_from_addr_param, 10841da177e4SLinus Torvalds .to_addr_param = sctp_v6_to_addr_param, 10851da177e4SLinus Torvalds .cmp_addr = sctp_v6_cmp_addr, 10861da177e4SLinus Torvalds .scope = sctp_v6_scope, 10871da177e4SLinus Torvalds .addr_valid = sctp_v6_addr_valid, 10881da177e4SLinus Torvalds .inaddr_any = sctp_v6_inaddr_any, 10891da177e4SLinus Torvalds .is_any = sctp_v6_is_any, 10901da177e4SLinus Torvalds .available = sctp_v6_available, 10911da177e4SLinus Torvalds .skb_iif = sctp_v6_skb_iif, 10921da177e4SLinus Torvalds .is_ce = sctp_v6_is_ce, 10931da177e4SLinus Torvalds .seq_dump_addr = sctp_v6_seq_dump_addr, 1094b9031d9dSVlad Yasevich .ecn_capable = sctp_v6_ecn_capable, 10951da177e4SLinus Torvalds .net_header_len = sizeof(struct ipv6hdr), 10961da177e4SLinus Torvalds .sockaddr_len = sizeof(struct sockaddr_in6), 1097b7e10c25SRichard Haines .ip_options_len = sctp_v6_ip_options_len, 1098543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1099543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_ipv6_setsockopt, 1100543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_ipv6_getsockopt, 1101543d9cfeSArnaldo Carvalho de Melo #endif 11021da177e4SLinus Torvalds }; 11031da177e4SLinus Torvalds 110415efbe76SNeil Horman static struct sctp_pf sctp_pf_inet6 = { 11051da177e4SLinus Torvalds .event_msgname = sctp_inet6_event_msgname, 11061da177e4SLinus Torvalds .skb_msgname = sctp_inet6_skb_msgname, 11071da177e4SLinus Torvalds .af_supported = sctp_inet6_af_supported, 11081da177e4SLinus Torvalds .cmp_addr = sctp_inet6_cmp_addr, 11091da177e4SLinus Torvalds .bind_verify = sctp_inet6_bind_verify, 11101da177e4SLinus Torvalds .send_verify = sctp_inet6_send_verify, 11111da177e4SLinus Torvalds .supported_addrs = sctp_inet6_supported_addrs, 11121da177e4SLinus Torvalds .create_accept_sk = sctp_v6_create_accept_sk, 1113299ee123SJason Gunthorpe .addr_to_user = sctp_v6_addr_to_user, 1114299ee123SJason Gunthorpe .to_sk_saddr = sctp_v6_to_sk_saddr, 1115299ee123SJason Gunthorpe .to_sk_daddr = sctp_v6_to_sk_daddr, 1116b7e10c25SRichard Haines .copy_ip_options = sctp_v6_copy_ip_options, 111715efbe76SNeil Horman .af = &sctp_af_inet6, 11181da177e4SLinus Torvalds }; 11191da177e4SLinus Torvalds 1120827bf122SSridhar Samudrala /* Initialize IPv6 support and register with socket layer. */ 1121270637abSVlad Yasevich void sctp_v6_pf_init(void) 11221da177e4SLinus Torvalds { 11231da177e4SLinus Torvalds /* Register the SCTP specific PF_INET6 functions. */ 112415efbe76SNeil Horman sctp_register_pf(&sctp_pf_inet6, PF_INET6); 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds /* Register the SCTP specific AF_INET6 functions. */ 112715efbe76SNeil Horman sctp_register_af(&sctp_af_inet6); 1128270637abSVlad Yasevich } 1129270637abSVlad Yasevich 1130270637abSVlad Yasevich void sctp_v6_pf_exit(void) 1131270637abSVlad Yasevich { 1132270637abSVlad Yasevich list_del(&sctp_af_inet6.list); 1133270637abSVlad Yasevich } 1134270637abSVlad Yasevich 1135270637abSVlad Yasevich /* Initialize IPv6 support and register with socket layer. */ 1136270637abSVlad Yasevich int sctp_v6_protosw_init(void) 1137270637abSVlad Yasevich { 1138270637abSVlad Yasevich int rc; 11391da177e4SLinus Torvalds 1140827bf122SSridhar Samudrala rc = proto_register(&sctpv6_prot, 1); 1141827bf122SSridhar Samudrala if (rc) 1142827bf122SSridhar Samudrala return rc; 1143827bf122SSridhar Samudrala 1144827bf122SSridhar Samudrala /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ 1145827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_seqpacket_protosw); 1146827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_stream_protosw); 1147827bf122SSridhar Samudrala 1148827bf122SSridhar Samudrala return 0; 1149827bf122SSridhar Samudrala } 1150827bf122SSridhar Samudrala 1151270637abSVlad Yasevich void sctp_v6_protosw_exit(void) 1152270637abSVlad Yasevich { 1153270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_seqpacket_protosw); 1154270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_stream_protosw); 1155270637abSVlad Yasevich proto_unregister(&sctpv6_prot); 1156270637abSVlad Yasevich } 1157270637abSVlad Yasevich 1158270637abSVlad Yasevich 1159827bf122SSridhar Samudrala /* Register with inet6 layer. */ 1160827bf122SSridhar Samudrala int sctp_v6_add_protocol(void) 1161827bf122SSridhar Samudrala { 11621da177e4SLinus Torvalds /* Register notifier for inet6 address additions/deletions. */ 11631da177e4SLinus Torvalds register_inet6addr_notifier(&sctp_inet6addr_notifier); 1164827bf122SSridhar Samudrala 1165827bf122SSridhar Samudrala if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) 1166827bf122SSridhar Samudrala return -EAGAIN; 1167827bf122SSridhar Samudrala 1168827bf122SSridhar Samudrala return 0; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 1171827bf122SSridhar Samudrala /* Unregister with inet6 layer. */ 1172827bf122SSridhar Samudrala void sctp_v6_del_protocol(void) 1173827bf122SSridhar Samudrala { 1174827bf122SSridhar Samudrala inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); 1175827bf122SSridhar Samudrala unregister_inet6addr_notifier(&sctp_inet6addr_notifier); 11761da177e4SLinus Torvalds } 1177