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> 58259db53bSXin Long #include <net/udp_tunnel.h> 591da177e4SLinus Torvalds 607c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 611da177e4SLinus Torvalds 6262503411SWeixing Shi static inline int sctp_v6_addr_match_len(union sctp_addr *s1, 6362503411SWeixing Shi union sctp_addr *s2); 649914ae3cSVlad Yasevich static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, 659914ae3cSVlad Yasevich __be16 port); 669914ae3cSVlad Yasevich static int sctp_v6_cmp_addr(const union sctp_addr *addr1, 679914ae3cSVlad Yasevich const union sctp_addr *addr2); 6862503411SWeixing Shi 6929303547SVlad Yasevich /* Event handler for inet6 address addition/deletion events. 7029303547SVlad Yasevich * The sctp_local_addr_list needs to be protocted by a spin lock since 7129303547SVlad Yasevich * multiple notifiers (say IPv4 and IPv6) may be running at the same 7229303547SVlad Yasevich * time and thus corrupt the list. 7329303547SVlad Yasevich * The reader side is protected with RCU. 7429303547SVlad Yasevich */ 7524123186SAdrian Bunk static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, 7629c7cf96SSridhar Samudrala void *ptr) 7729c7cf96SSridhar Samudrala { 7829c7cf96SSridhar Samudrala struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 7929303547SVlad Yasevich struct sctp_sockaddr_entry *addr = NULL; 8029303547SVlad Yasevich struct sctp_sockaddr_entry *temp; 814db67e80SEric W. Biederman struct net *net = dev_net(ifa->idev->dev); 8222626216SChidambar 'ilLogict' Zinnoury int found = 0; 8329c7cf96SSridhar Samudrala 8429c7cf96SSridhar Samudrala switch (ev) { 8529c7cf96SSridhar Samudrala case NETDEV_UP: 86400b8b9aSXin Long addr = kzalloc(sizeof(*addr), GFP_ATOMIC); 8729c7cf96SSridhar Samudrala if (addr) { 8829c7cf96SSridhar Samudrala addr->a.v6.sin6_family = AF_INET6; 894e3fd7a0SAlexey Dobriyan addr->a.v6.sin6_addr = ifa->addr; 9029c7cf96SSridhar Samudrala addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; 9129303547SVlad Yasevich addr->valid = 1; 924db67e80SEric W. Biederman spin_lock_bh(&net->sctp.local_addr_lock); 934db67e80SEric W. Biederman list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list); 944db67e80SEric W. Biederman sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW); 954db67e80SEric W. Biederman spin_unlock_bh(&net->sctp.local_addr_lock); 9629c7cf96SSridhar Samudrala } 9729c7cf96SSridhar Samudrala break; 9829c7cf96SSridhar Samudrala case NETDEV_DOWN: 994db67e80SEric W. Biederman spin_lock_bh(&net->sctp.local_addr_lock); 10029303547SVlad Yasevich list_for_each_entry_safe(addr, temp, 1014db67e80SEric W. Biederman &net->sctp.local_addr_list, list) { 102a40a7d15SPavel Emelyanov if (addr->a.sa.sa_family == AF_INET6 && 103a40a7d15SPavel Emelyanov ipv6_addr_equal(&addr->a.v6.sin6_addr, 10429303547SVlad Yasevich &ifa->addr)) { 1054db67e80SEric W. Biederman sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL); 10622626216SChidambar 'ilLogict' Zinnoury found = 1; 10729303547SVlad Yasevich addr->valid = 0; 10829303547SVlad Yasevich list_del_rcu(&addr->list); 10929c7cf96SSridhar Samudrala break; 11029c7cf96SSridhar Samudrala } 11129c7cf96SSridhar Samudrala } 1124db67e80SEric W. Biederman spin_unlock_bh(&net->sctp.local_addr_lock); 11322626216SChidambar 'ilLogict' Zinnoury if (found) 1141231f0baSLai Jiangshan kfree_rcu(addr, rcu); 11529c7cf96SSridhar Samudrala break; 11629c7cf96SSridhar Samudrala } 11729c7cf96SSridhar Samudrala 11829c7cf96SSridhar Samudrala return NOTIFY_DONE; 11929c7cf96SSridhar Samudrala } 12029c7cf96SSridhar Samudrala 1211da177e4SLinus Torvalds static struct notifier_block sctp_inet6addr_notifier = { 12229c7cf96SSridhar Samudrala .notifier_call = sctp_inet6addr_event, 1231da177e4SLinus Torvalds }; 1241da177e4SLinus Torvalds 125f6549bd3SXin Long static void sctp_v6_err_handle(struct sctp_transport *t, struct sk_buff *skb, 126f6549bd3SXin Long __u8 type, __u8 code, __u32 info) 127f6549bd3SXin Long { 128f6549bd3SXin Long struct sctp_association *asoc = t->asoc; 129f6549bd3SXin Long struct sock *sk = asoc->base.sk; 130f6549bd3SXin Long struct ipv6_pinfo *np; 131f6549bd3SXin Long int err = 0; 132f6549bd3SXin Long 133f6549bd3SXin Long switch (type) { 134f6549bd3SXin Long case ICMPV6_PKT_TOOBIG: 135f6549bd3SXin Long if (ip6_sk_accept_pmtu(sk)) 136f6549bd3SXin Long sctp_icmp_frag_needed(sk, asoc, t, info); 137f6549bd3SXin Long return; 138f6549bd3SXin Long case ICMPV6_PARAMPROB: 139f6549bd3SXin Long if (ICMPV6_UNK_NEXTHDR == code) { 140f6549bd3SXin Long sctp_icmp_proto_unreachable(sk, asoc, t); 141f6549bd3SXin Long return; 142f6549bd3SXin Long } 143f6549bd3SXin Long break; 144f6549bd3SXin Long case NDISC_REDIRECT: 145f6549bd3SXin Long sctp_icmp_redirect(sk, t, skb); 146f6549bd3SXin Long return; 147f6549bd3SXin Long default: 148f6549bd3SXin Long break; 149f6549bd3SXin Long } 150f6549bd3SXin Long 151f6549bd3SXin Long np = inet6_sk(sk); 152f6549bd3SXin Long icmpv6_err_convert(type, code, &err); 153f6549bd3SXin Long if (!sock_owned_by_user(sk) && np->recverr) { 154f6549bd3SXin Long sk->sk_err = err; 155f6549bd3SXin Long sk->sk_error_report(sk); 156f6549bd3SXin Long } else { 157f6549bd3SXin Long sk->sk_err_soft = err; 158f6549bd3SXin Long } 159f6549bd3SXin Long } 160f6549bd3SXin Long 1611da177e4SLinus Torvalds /* ICMP error handler. */ 16232bbd879SStefano Brivio static int sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 163d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info) 1641da177e4SLinus Torvalds { 1654110cc25SEric W. Biederman struct net *net = dev_net(skb->dev); 166f6549bd3SXin Long struct sctp_transport *transport; 167f6549bd3SXin Long struct sctp_association *asoc; 168f6549bd3SXin Long __u16 saveip, savesctp; 169f6549bd3SXin Long struct sock *sk; 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds /* Fix up skb to look at the embedded net header. */ 172b0e380b1SArnaldo Carvalho de Melo saveip = skb->network_header; 173b0e380b1SArnaldo Carvalho de Melo savesctp = skb->transport_header; 1741ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 175a27ef749SArnaldo Carvalho de Melo skb_set_transport_header(skb, offset); 1764110cc25SEric W. Biederman sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); 1771da177e4SLinus Torvalds /* Put back, the original pointers. */ 178b0e380b1SArnaldo Carvalho de Melo skb->network_header = saveip; 179b0e380b1SArnaldo Carvalho de Melo skb->transport_header = savesctp; 1801da177e4SLinus Torvalds if (!sk) { 181237a6a2eSXin Long __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), ICMP6_MIB_INERRORS); 182237a6a2eSXin Long return -ENOENT; 1831da177e4SLinus Torvalds } 1841da177e4SLinus Torvalds 185f6549bd3SXin Long sctp_v6_err_handle(transport, skb, type, code, ntohl(info)); 186dae399d7SXin Long sctp_err_finish(sk, transport); 187f6549bd3SXin Long 188f6549bd3SXin Long return 0; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 191*9e47df00SXin Long int sctp_udp_v6_err(struct sock *sk, struct sk_buff *skb) 192*9e47df00SXin Long { 193*9e47df00SXin Long struct net *net = dev_net(skb->dev); 194*9e47df00SXin Long struct sctp_association *asoc; 195*9e47df00SXin Long struct sctp_transport *t; 196*9e47df00SXin Long struct icmp6hdr *hdr; 197*9e47df00SXin Long __u32 info = 0; 198*9e47df00SXin Long 199*9e47df00SXin Long skb->transport_header += sizeof(struct udphdr); 200*9e47df00SXin Long sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &t); 201*9e47df00SXin Long if (!sk) { 202*9e47df00SXin Long __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), ICMP6_MIB_INERRORS); 203*9e47df00SXin Long return -ENOENT; 204*9e47df00SXin Long } 205*9e47df00SXin Long 206*9e47df00SXin Long skb->transport_header -= sizeof(struct udphdr); 207*9e47df00SXin Long hdr = (struct icmp6hdr *)(skb_network_header(skb) - sizeof(struct icmp6hdr)); 208*9e47df00SXin Long if (hdr->icmp6_type == NDISC_REDIRECT) { 209*9e47df00SXin Long /* can't be handled without outer ip6hdr known, leave it to udpv6_err */ 210*9e47df00SXin Long sctp_err_finish(sk, t); 211*9e47df00SXin Long return 0; 212*9e47df00SXin Long } 213*9e47df00SXin Long if (hdr->icmp6_type == ICMPV6_PKT_TOOBIG) 214*9e47df00SXin Long info = ntohl(hdr->icmp6_mtu); 215*9e47df00SXin Long sctp_v6_err_handle(t, skb, hdr->icmp6_type, hdr->icmp6_code, info); 216*9e47df00SXin Long 217*9e47df00SXin Long sctp_err_finish(sk, t); 218*9e47df00SXin Long return 1; 219*9e47df00SXin Long } 220*9e47df00SXin Long 221259db53bSXin Long static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *t) 2221da177e4SLinus Torvalds { 223259db53bSXin Long struct dst_entry *dst = dst_clone(t->dst); 224259db53bSXin Long struct flowi6 *fl6 = &t->fl.u.ip6; 2251da177e4SLinus Torvalds struct sock *sk = skb->sk; 2261da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2278a9c58d2SXin Long __u8 tclass = np->tclass; 228259db53bSXin Long __be32 label; 2291da177e4SLinus Torvalds 230bb33381dSDaniel Borkmann pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb, 23195ee6208SDaniel Borkmann skb->len, &fl6->saddr, &fl6->daddr); 2321da177e4SLinus Torvalds 233259db53bSXin Long if (t->dscp & SCTP_DSCP_SET_MASK) 234259db53bSXin Long tclass = t->dscp & SCTP_DSCP_VAL_MASK; 2358a9c58d2SXin Long 2368a9c58d2SXin Long if (INET_ECN_is_capable(tclass)) 23795ee6208SDaniel Borkmann IP6_ECN_flow_xmit(sk, fl6->flowlabel); 2381da177e4SLinus Torvalds 239259db53bSXin Long if (!(t->param_flags & SPP_PMTUD_ENABLE)) 24060ff7467SWANG Cong skb->ignore_df = 1; 241f880374cSHerbert Xu 24295ee6208SDaniel Borkmann SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS); 24395ee6208SDaniel Borkmann 244259db53bSXin Long if (!t->encap_port || !sctp_sk(sk)->udp_port) { 245259db53bSXin Long int res; 246259db53bSXin Long 247259db53bSXin Long skb_dst_set(skb, dst); 248c836a8baSEric Dumazet rcu_read_lock(); 249259db53bSXin Long res = ip6_xmit(sk, skb, fl6, sk->sk_mark, 250259db53bSXin Long rcu_dereference(np->opt), 2514f6570d7SEric Dumazet tclass, sk->sk_priority); 252c836a8baSEric Dumazet rcu_read_unlock(); 253c836a8baSEric Dumazet return res; 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 256259db53bSXin Long if (skb_is_gso(skb)) 257259db53bSXin Long skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL_CSUM; 258259db53bSXin Long 259259db53bSXin Long skb->encapsulation = 1; 260259db53bSXin Long skb_reset_inner_mac_header(skb); 261259db53bSXin Long skb_reset_inner_transport_header(skb); 262259db53bSXin Long skb_set_inner_ipproto(skb, IPPROTO_SCTP); 263259db53bSXin Long label = ip6_make_flowlabel(sock_net(sk), skb, fl6->flowlabel, true, fl6); 264259db53bSXin Long 265259db53bSXin Long return udp_tunnel6_xmit_skb(dst, sk, skb, NULL, &fl6->saddr, 266259db53bSXin Long &fl6->daddr, tclass, ip6_dst_hoplimit(dst), 267259db53bSXin Long label, sctp_sk(sk)->udp_port, t->encap_port, false); 268259db53bSXin Long } 269259db53bSXin Long 2701da177e4SLinus Torvalds /* Returns the dst cache entry for the given source and destination ip 2711da177e4SLinus Torvalds * addresses. 2721da177e4SLinus Torvalds */ 273da0420beSVlad Yasevich static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, 274da0420beSVlad Yasevich struct flowi *fl, struct sock *sk) 2751da177e4SLinus Torvalds { 276da0420beSVlad Yasevich struct sctp_association *asoc = t->asoc; 27762503411SWeixing Shi struct dst_entry *dst = NULL; 278582eea23SMarcelo Ricardo Leitner struct flowi _fl; 279582eea23SMarcelo Ricardo Leitner struct flowi6 *fl6 = &_fl.u.ip6; 28062503411SWeixing Shi struct sctp_bind_addr *bp; 28195ee6208SDaniel Borkmann struct ipv6_pinfo *np = inet6_sk(sk); 28262503411SWeixing Shi struct sctp_sockaddr_entry *laddr; 283da0420beSVlad Yasevich union sctp_addr *daddr = &t->ipaddr; 2849914ae3cSVlad Yasevich union sctp_addr dst_saddr; 28595ee6208SDaniel Borkmann struct in6_addr *final_p, final; 2861c662018SXin Long enum sctp_scope scope; 28762503411SWeixing Shi __u8 matchlen = 0; 2881da177e4SLinus Torvalds 289582eea23SMarcelo Ricardo Leitner memset(&_fl, 0, sizeof(_fl)); 2904e3fd7a0SAlexey Dobriyan fl6->daddr = daddr->v6.sin6_addr; 2919c6a02f4SVlad Yasevich fl6->fl6_dport = daddr->v6.sin6_port; 2929c6a02f4SVlad Yasevich fl6->flowi6_proto = IPPROTO_SCTP; 2931da177e4SLinus Torvalds if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 2949914ae3cSVlad Yasevich fl6->flowi6_oif = daddr->v6.sin6_scope_id; 29525e7f2deSZheng Li else if (asoc) 29625e7f2deSZheng Li fl6->flowi6_oif = asoc->base.sk->sk_bound_dev_if; 2978a9c58d2SXin Long if (t->flowlabel & SCTP_FLOWLABEL_SET_MASK) 2988a9c58d2SXin Long fl6->flowlabel = htonl(t->flowlabel & SCTP_FLOWLABEL_VAL_MASK); 2991da177e4SLinus Torvalds 3000999f021SXin Long if (np->sndflow && (fl6->flowlabel & IPV6_FLOWLABEL_MASK)) { 3010999f021SXin Long struct ip6_flowlabel *flowlabel; 3020999f021SXin Long 3030999f021SXin Long flowlabel = fl6_sock_lookup(sk, fl6->flowlabel); 30459c820b2SWillem de Bruijn if (IS_ERR(flowlabel)) 3050999f021SXin Long goto out; 3060999f021SXin Long fl6_sock_release(flowlabel); 3070999f021SXin Long } 3080999f021SXin Long 309bb33381dSDaniel Borkmann pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr); 3101da177e4SLinus Torvalds 3119c6a02f4SVlad Yasevich if (asoc) 3129c6a02f4SVlad Yasevich fl6->fl6_sport = htons(asoc->base.bind_addr.port); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds if (saddr) { 3154e3fd7a0SAlexey Dobriyan fl6->saddr = saddr->v6.sin6_addr; 316ecf938feSXin Long if (!fl6->fl6_sport) 3179c6a02f4SVlad Yasevich fl6->fl6_sport = saddr->v6.sin6_port; 318bb33381dSDaniel Borkmann 319bb33381dSDaniel Borkmann pr_debug("src=%pI6 - ", &fl6->saddr); 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 322c836a8baSEric Dumazet rcu_read_lock(); 323c836a8baSEric Dumazet final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); 324c836a8baSEric Dumazet rcu_read_unlock(); 325c836a8baSEric Dumazet 326c4e85f73SSabrina Dubroca dst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p); 327582eea23SMarcelo Ricardo Leitner if (!asoc || saddr) { 328582eea23SMarcelo Ricardo Leitner t->dst = dst; 329582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 33062503411SWeixing Shi goto out; 331582eea23SMarcelo Ricardo Leitner } 33262503411SWeixing Shi 33362503411SWeixing Shi bp = &asoc->base.bind_addr; 33462503411SWeixing Shi scope = sctp_scope(daddr); 3359914ae3cSVlad Yasevich /* ip6_dst_lookup has filled in the fl6->saddr for us. Check 3369914ae3cSVlad Yasevich * to see if we can use it. 3379914ae3cSVlad Yasevich */ 3389c6a02f4SVlad Yasevich if (!IS_ERR(dst)) { 3399914ae3cSVlad Yasevich /* Walk through the bind address list and look for a bind 3409914ae3cSVlad Yasevich * address that matches the source address of the returned dst. 3419914ae3cSVlad Yasevich */ 3429914ae3cSVlad Yasevich sctp_v6_to_addr(&dst_saddr, &fl6->saddr, htons(bp->port)); 3439914ae3cSVlad Yasevich rcu_read_lock(); 3449914ae3cSVlad Yasevich list_for_each_entry_rcu(laddr, &bp->address_list, list) { 345fecda034SDaniel Borkmann if (!laddr->valid || laddr->state == SCTP_ADDR_DEL || 346fecda034SDaniel Borkmann (laddr->state != SCTP_ADDR_SRC && 347fecda034SDaniel Borkmann !asoc->src_out_of_asoc_ok)) 3489914ae3cSVlad Yasevich continue; 3499914ae3cSVlad Yasevich 3509914ae3cSVlad Yasevich /* Do not compare against v4 addrs */ 3519914ae3cSVlad Yasevich if ((laddr->a.sa.sa_family == AF_INET6) && 3529914ae3cSVlad Yasevich (sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) { 3539914ae3cSVlad Yasevich rcu_read_unlock(); 354582eea23SMarcelo Ricardo Leitner t->dst = dst; 355582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 3569914ae3cSVlad Yasevich goto out; 3579914ae3cSVlad Yasevich } 3589914ae3cSVlad Yasevich } 3599914ae3cSVlad Yasevich rcu_read_unlock(); 3609914ae3cSVlad Yasevich /* None of the bound addresses match the source address of the 3619914ae3cSVlad Yasevich * dst. So release it. 3629914ae3cSVlad Yasevich */ 3639914ae3cSVlad Yasevich dst_release(dst); 3649914ae3cSVlad Yasevich dst = NULL; 3659914ae3cSVlad Yasevich } 3669914ae3cSVlad Yasevich 3679914ae3cSVlad Yasevich /* Walk through the bind address list and try to get the 3689914ae3cSVlad Yasevich * best source address for a given destination. 36962503411SWeixing Shi */ 37062503411SWeixing Shi rcu_read_lock(); 37162503411SWeixing Shi list_for_each_entry_rcu(laddr, &bp->address_list, list) { 372dbc2b5e9SXin Long struct dst_entry *bdst; 373dbc2b5e9SXin Long __u8 bmatchlen; 374dbc2b5e9SXin Long 375dbc2b5e9SXin Long if (!laddr->valid || 376dbc2b5e9SXin Long laddr->state != SCTP_ADDR_SRC || 377dbc2b5e9SXin Long laddr->a.sa.sa_family != AF_INET6 || 378dbc2b5e9SXin Long scope > sctp_scope(&laddr->a)) 37962503411SWeixing Shi continue; 380dbc2b5e9SXin Long 381dbc2b5e9SXin Long fl6->saddr = laddr->a.v6.sin6_addr; 382dbc2b5e9SXin Long fl6->fl6_sport = laddr->a.v6.sin6_port; 383c836a8baSEric Dumazet final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final); 384c4e85f73SSabrina Dubroca bdst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p); 385dbc2b5e9SXin Long 386957d761cSAlexey Kodanev if (IS_ERR(bdst)) 387957d761cSAlexey Kodanev continue; 388957d761cSAlexey Kodanev 389957d761cSAlexey Kodanev if (ipv6_chk_addr(dev_net(bdst->dev), 390dbc2b5e9SXin Long &laddr->a.v6.sin6_addr, bdst->dev, 1)) { 391dbc2b5e9SXin Long if (!IS_ERR_OR_NULL(dst)) 392dbc2b5e9SXin Long dst_release(dst); 393dbc2b5e9SXin Long dst = bdst; 394582eea23SMarcelo Ricardo Leitner t->dst = dst; 395582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 396dbc2b5e9SXin Long break; 397dbc2b5e9SXin Long } 398dbc2b5e9SXin Long 399dbc2b5e9SXin Long bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); 400957d761cSAlexey Kodanev if (matchlen > bmatchlen) { 401957d761cSAlexey Kodanev dst_release(bdst); 402dbc2b5e9SXin Long continue; 403957d761cSAlexey Kodanev } 404dbc2b5e9SXin Long 405dbc2b5e9SXin Long if (!IS_ERR_OR_NULL(dst)) 406dbc2b5e9SXin Long dst_release(dst); 407dbc2b5e9SXin Long dst = bdst; 408dbc2b5e9SXin Long matchlen = bmatchlen; 409582eea23SMarcelo Ricardo Leitner t->dst = dst; 410582eea23SMarcelo Ricardo Leitner memcpy(fl, &_fl, sizeof(_fl)); 41162503411SWeixing Shi } 41269ce6487SEric Dumazet rcu_read_unlock(); 4139914ae3cSVlad Yasevich 41462503411SWeixing Shi out: 415ee3f34e8STommi Rantala if (!IS_ERR_OR_NULL(dst)) { 4161da177e4SLinus Torvalds struct rt6_info *rt; 417bb33381dSDaniel Borkmann 4181da177e4SLinus Torvalds rt = (struct rt6_info *)dst; 419b197df4fSMartin KaFai Lau t->dst_cookie = rt6_get_cookie(rt); 420fd0273d7SMartin KaFai Lau pr_debug("rt6_dst:%pI6/%d rt6_src:%pI6\n", 421fd0273d7SMartin KaFai Lau &rt->rt6i_dst.addr, rt->rt6i_dst.plen, 422582eea23SMarcelo Ricardo Leitner &fl->u.ip6.saddr); 423da0420beSVlad Yasevich } else { 424da0420beSVlad Yasevich t->dst = NULL; 425bb33381dSDaniel Borkmann pr_debug("no route\n"); 426da0420beSVlad Yasevich } 4274251320fSVille Nuorvala } 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds /* Returns the number of consecutive initial bits that match in the 2 ipv6 4301da177e4SLinus Torvalds * addresses. 4311da177e4SLinus Torvalds */ 4321da177e4SLinus Torvalds static inline int sctp_v6_addr_match_len(union sctp_addr *s1, 4331da177e4SLinus Torvalds union sctp_addr *s2) 4341da177e4SLinus Torvalds { 435de7737e0SYOSHIFUJI Hideaki / 吉藤英明 return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr); 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /* Fills in the source address(saddr) based on the destination address(daddr) 4391da177e4SLinus Torvalds * and asoc's bind address list. 4401da177e4SLinus Torvalds */ 441e5117101SYOSHIFUJI Hideaki static void sctp_v6_get_saddr(struct sctp_sock *sk, 4429914ae3cSVlad Yasevich struct sctp_transport *t, 4439914ae3cSVlad Yasevich struct flowi *fl) 4441da177e4SLinus Torvalds { 4459914ae3cSVlad Yasevich struct flowi6 *fl6 = &fl->u.ip6; 4469914ae3cSVlad Yasevich union sctp_addr *saddr = &t->saddr; 4471da177e4SLinus Torvalds 448bb33381dSDaniel Borkmann pr_debug("%s: asoc:%p dst:%p\n", __func__, t->asoc, t->dst); 4491da177e4SLinus Torvalds 4509914ae3cSVlad Yasevich if (t->dst) { 4519914ae3cSVlad Yasevich saddr->v6.sin6_family = AF_INET6; 4524e3fd7a0SAlexey Dobriyan saddr->v6.sin6_addr = fl6->saddr; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds } 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds /* Make a copy of all potential local addresses. */ 4571da177e4SLinus Torvalds static void sctp_v6_copy_addrlist(struct list_head *addrlist, 4581da177e4SLinus Torvalds struct net_device *dev) 4591da177e4SLinus Torvalds { 4601da177e4SLinus Torvalds struct inet6_dev *in6_dev; 4611da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 4621da177e4SLinus Torvalds struct sctp_sockaddr_entry *addr; 4631da177e4SLinus Torvalds 4648814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 4651da177e4SLinus Torvalds if ((in6_dev = __in6_dev_get(dev)) == NULL) { 4668814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 4671da177e4SLinus Torvalds return; 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds 470e2eb8d45SJarek Poplawski read_lock_bh(&in6_dev->lock); 471502a2ffdSstephen hemminger list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 4721da177e4SLinus Torvalds /* Add the address to the local list. */ 473939cfa75SDaniel Borkmann addr = kzalloc(sizeof(*addr), GFP_ATOMIC); 4741da177e4SLinus Torvalds if (addr) { 4752a6fd78aSAl Viro addr->a.v6.sin6_family = AF_INET6; 4764e3fd7a0SAlexey Dobriyan addr->a.v6.sin6_addr = ifp->addr; 4772a6fd78aSAl Viro addr->a.v6.sin6_scope_id = dev->ifindex; 47829303547SVlad Yasevich addr->valid = 1; 4791da177e4SLinus Torvalds INIT_LIST_HEAD(&addr->list); 4801da177e4SLinus Torvalds list_add_tail(&addr->list, addrlist); 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 484e2eb8d45SJarek Poplawski read_unlock_bh(&in6_dev->lock); 4858814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 488b7e10c25SRichard Haines /* Copy over any ip options */ 489b7e10c25SRichard Haines static void sctp_v6_copy_ip_options(struct sock *sk, struct sock *newsk) 490b7e10c25SRichard Haines { 491b7e10c25SRichard Haines struct ipv6_pinfo *newnp, *np = inet6_sk(sk); 492b7e10c25SRichard Haines struct ipv6_txoptions *opt; 493b7e10c25SRichard Haines 494b7e10c25SRichard Haines newnp = inet6_sk(newsk); 495b7e10c25SRichard Haines 496b7e10c25SRichard Haines rcu_read_lock(); 497b7e10c25SRichard Haines opt = rcu_dereference(np->opt); 498b7e10c25SRichard Haines if (opt) { 499b7e10c25SRichard Haines opt = ipv6_dup_options(newsk, opt); 500b7e10c25SRichard Haines if (!opt) 501b7e10c25SRichard Haines pr_err("%s: Failed to copy ip options\n", __func__); 502b7e10c25SRichard Haines } 503b7e10c25SRichard Haines RCU_INIT_POINTER(newnp->opt, opt); 504b7e10c25SRichard Haines rcu_read_unlock(); 505b7e10c25SRichard Haines } 506b7e10c25SRichard Haines 507b7e10c25SRichard Haines /* Account for the IP options */ 508b7e10c25SRichard Haines static int sctp_v6_ip_options_len(struct sock *sk) 509b7e10c25SRichard Haines { 510b7e10c25SRichard Haines struct ipv6_pinfo *np = inet6_sk(sk); 511b7e10c25SRichard Haines struct ipv6_txoptions *opt; 512b7e10c25SRichard Haines int len = 0; 513b7e10c25SRichard Haines 514b7e10c25SRichard Haines rcu_read_lock(); 515b7e10c25SRichard Haines opt = rcu_dereference(np->opt); 516b7e10c25SRichard Haines if (opt) 517b7e10c25SRichard Haines len = opt->opt_flen + opt->opt_nflen; 518b7e10c25SRichard Haines 519b7e10c25SRichard Haines rcu_read_unlock(); 520b7e10c25SRichard Haines return len; 521b7e10c25SRichard Haines } 522b7e10c25SRichard Haines 5231da177e4SLinus Torvalds /* Initialize a sockaddr_storage from in incoming skb. */ 5241da177e4SLinus Torvalds static void sctp_v6_from_skb(union sctp_addr *addr, struct sk_buff *skb, 5251da177e4SLinus Torvalds int is_saddr) 5261da177e4SLinus Torvalds { 5270630c56eSMarcelo Ricardo Leitner /* Always called on head skb, so this is safe */ 5280630c56eSMarcelo Ricardo Leitner struct sctphdr *sh = sctp_hdr(skb); 5290630c56eSMarcelo Ricardo Leitner struct sockaddr_in6 *sa = &addr->v6; 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5321da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* FIXME */ 5331da177e4SLinus Torvalds addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds if (is_saddr) { 5360630c56eSMarcelo Ricardo Leitner sa->sin6_port = sh->source; 5370630c56eSMarcelo Ricardo Leitner sa->sin6_addr = ipv6_hdr(skb)->saddr; 5381da177e4SLinus Torvalds } else { 5390630c56eSMarcelo Ricardo Leitner sa->sin6_port = sh->dest; 5400630c56eSMarcelo Ricardo Leitner sa->sin6_addr = ipv6_hdr(skb)->daddr; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds /* Initialize an sctp_addr from a socket. */ 5451da177e4SLinus Torvalds static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5487dcdbd95SAl Viro addr->v6.sin6_port = 0; 549efe4208fSEric Dumazet addr->v6.sin6_addr = sk->sk_v6_rcv_saddr; 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds /* Initialize sk->sk_rcv_saddr from sctp_addr. */ 5531da177e4SLinus Torvalds static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) 5541da177e4SLinus Torvalds { 555299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) { 556efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[0] = 0; 557efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[1] = 0; 558efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); 559efe4208fSEric Dumazet sk->sk_v6_rcv_saddr.s6_addr32[3] = 5601da177e4SLinus Torvalds addr->v4.sin_addr.s_addr; 5611da177e4SLinus Torvalds } else { 562efe4208fSEric Dumazet sk->sk_v6_rcv_saddr = addr->v6.sin6_addr; 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds /* Initialize sk->sk_daddr from sctp_addr. */ 5671da177e4SLinus Torvalds static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) 5681da177e4SLinus Torvalds { 569299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) { 570efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[0] = 0; 571efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[1] = 0; 572efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[2] = htonl(0x0000ffff); 573efe4208fSEric Dumazet sk->sk_v6_daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; 5741da177e4SLinus Torvalds } else { 575efe4208fSEric Dumazet sk->sk_v6_daddr = addr->v6.sin6_addr; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds /* Initialize a sctp_addr from an address parameter. */ 5801da177e4SLinus Torvalds static void sctp_v6_from_addr_param(union sctp_addr *addr, 5811da177e4SLinus Torvalds union sctp_addr_param *param, 582dd86d136SAl Viro __be16 port, int iif) 5831da177e4SLinus Torvalds { 5841da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5851da177e4SLinus Torvalds addr->v6.sin6_port = port; 5861da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* BUG */ 5874e3fd7a0SAlexey Dobriyan addr->v6.sin6_addr = param->v6.addr; 5881da177e4SLinus Torvalds addr->v6.sin6_scope_id = iif; 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds /* Initialize an address parameter from a sctp_addr and return the length 5921da177e4SLinus Torvalds * of the address parameter. 5931da177e4SLinus Torvalds */ 5941da177e4SLinus Torvalds static int sctp_v6_to_addr_param(const union sctp_addr *addr, 5951da177e4SLinus Torvalds union sctp_addr_param *param) 5961da177e4SLinus Torvalds { 59700987cc0SXin Long int length = sizeof(struct sctp_ipv6addr_param); 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; 600dbc16db1SAl Viro param->v6.param_hdr.length = htons(length); 6014e3fd7a0SAlexey Dobriyan param->v6.addr = addr->v6.sin6_addr; 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds return length; 6041da177e4SLinus Torvalds } 6051da177e4SLinus Torvalds 6069914ae3cSVlad Yasevich /* Initialize a sctp_addr from struct in6_addr. */ 6079914ae3cSVlad Yasevich static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, 608854d43a4SAl Viro __be16 port) 6091da177e4SLinus Torvalds { 6101da177e4SLinus Torvalds addr->sa.sa_family = AF_INET6; 6111da177e4SLinus Torvalds addr->v6.sin6_port = port; 61215339e44SAlexander Potapenko addr->v6.sin6_flowinfo = 0; 6134e3fd7a0SAlexey Dobriyan addr->v6.sin6_addr = *saddr; 61415339e44SAlexander Potapenko addr->v6.sin6_scope_id = 0; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds 6171071ec9dSXin Long static int __sctp_v6_cmp_addr(const union sctp_addr *addr1, 6181071ec9dSXin Long const union sctp_addr *addr2) 6191071ec9dSXin Long { 6201071ec9dSXin Long if (addr1->sa.sa_family != addr2->sa.sa_family) { 6211071ec9dSXin Long if (addr1->sa.sa_family == AF_INET && 6221071ec9dSXin Long addr2->sa.sa_family == AF_INET6 && 6231071ec9dSXin Long ipv6_addr_v4mapped(&addr2->v6.sin6_addr) && 6241071ec9dSXin Long addr2->v6.sin6_addr.s6_addr32[3] == 6251071ec9dSXin Long addr1->v4.sin_addr.s_addr) 6261071ec9dSXin Long return 1; 6271071ec9dSXin Long 6281071ec9dSXin Long if (addr2->sa.sa_family == AF_INET && 6291071ec9dSXin Long addr1->sa.sa_family == AF_INET6 && 6301071ec9dSXin Long ipv6_addr_v4mapped(&addr1->v6.sin6_addr) && 6311071ec9dSXin Long addr1->v6.sin6_addr.s6_addr32[3] == 6321071ec9dSXin Long addr2->v4.sin_addr.s_addr) 6331071ec9dSXin Long return 1; 6341071ec9dSXin Long 6351071ec9dSXin Long return 0; 6361071ec9dSXin Long } 6371071ec9dSXin Long 6381071ec9dSXin Long if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) 6391071ec9dSXin Long return 0; 6401071ec9dSXin Long 6411071ec9dSXin Long /* If this is a linklocal address, compare the scope_id. */ 6421071ec9dSXin Long if ((ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) && 6431071ec9dSXin Long addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && 6441071ec9dSXin Long addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id) 6451071ec9dSXin Long return 0; 6461071ec9dSXin Long 6471071ec9dSXin Long return 1; 6481071ec9dSXin Long } 6491071ec9dSXin Long 6501da177e4SLinus Torvalds /* Compare addresses exactly. 6511da177e4SLinus Torvalds * v4-mapped-v6 is also in consideration. 6521da177e4SLinus Torvalds */ 6531da177e4SLinus Torvalds static int sctp_v6_cmp_addr(const union sctp_addr *addr1, 6541da177e4SLinus Torvalds const union sctp_addr *addr2) 6551da177e4SLinus Torvalds { 6561071ec9dSXin Long return __sctp_v6_cmp_addr(addr1, addr2) && 6571071ec9dSXin Long addr1->v6.sin6_port == addr2->v6.sin6_port; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds /* Initialize addr struct to INADDR_ANY. */ 6616fbfa9f9SAl Viro static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) 6621da177e4SLinus Torvalds { 6631da177e4SLinus Torvalds memset(addr, 0x00, sizeof(union sctp_addr)); 6641da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 6651da177e4SLinus Torvalds addr->v6.sin6_port = port; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds /* Is this a wildcard address? */ 6691da177e4SLinus Torvalds static int sctp_v6_is_any(const union sctp_addr *addr) 6701da177e4SLinus Torvalds { 671b9b9e10fSBrian Haley return ipv6_addr_any(&addr->v6.sin6_addr); 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds /* Should this be available for binding? */ 6751da177e4SLinus Torvalds static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) 6761da177e4SLinus Torvalds { 6771da177e4SLinus Torvalds int type; 6789b974202SXin Long struct net *net = sock_net(&sp->inet.sk); 679b71d1d42SEric Dumazet const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds type = ipv6_addr_type(in6); 6821da177e4SLinus Torvalds if (IPV6_ADDR_ANY == type) 6831da177e4SLinus Torvalds return 1; 6841da177e4SLinus Torvalds if (type == IPV6_ADDR_MAPPED) { 6851da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 6861da177e4SLinus Torvalds return 0; 6871da177e4SLinus Torvalds sctp_v6_map_v4(addr); 6881da177e4SLinus Torvalds return sctp_get_af_specific(AF_INET)->available(addr, sp); 6891da177e4SLinus Torvalds } 6901da177e4SLinus Torvalds if (!(type & IPV6_ADDR_UNICAST)) 6911da177e4SLinus Torvalds return 0; 6921da177e4SLinus Torvalds 693630e4576SMaciej Żenczykowski return ipv6_can_nonlocal_bind(net, &sp->inet) || 6949b974202SXin Long ipv6_chk_addr(net, in6, NULL, 0); 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds /* This function checks if the address is a valid address to be used for 6981da177e4SLinus Torvalds * SCTP. 6991da177e4SLinus Torvalds * 7001da177e4SLinus Torvalds * Output: 7011da177e4SLinus Torvalds * Return 0 - If the address is a non-unicast or an illegal address. 7021da177e4SLinus Torvalds * Return 1 - If the address is a unicast. 7031da177e4SLinus Torvalds */ 7045636bef7SVlad Yasevich static int sctp_v6_addr_valid(union sctp_addr *addr, 7055636bef7SVlad Yasevich struct sctp_sock *sp, 7065636bef7SVlad Yasevich const struct sk_buff *skb) 7071da177e4SLinus Torvalds { 7081da177e4SLinus Torvalds int ret = ipv6_addr_type(&addr->v6.sin6_addr); 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds /* Support v4-mapped-v6 address. */ 7111da177e4SLinus Torvalds if (ret == IPV6_ADDR_MAPPED) { 7121da177e4SLinus Torvalds /* Note: This routine is used in input, so v4-mapped-v6 7131da177e4SLinus Torvalds * are disallowed here when there is no sctp_sock. 7141da177e4SLinus Torvalds */ 7151da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 7161da177e4SLinus Torvalds return 0; 7171da177e4SLinus Torvalds sctp_v6_map_v4(addr); 7185636bef7SVlad Yasevich return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); 7191da177e4SLinus Torvalds } 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds /* Is this a non-unicast address */ 7221da177e4SLinus Torvalds if (!(ret & IPV6_ADDR_UNICAST)) 7231da177e4SLinus Torvalds return 0; 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds return 1; 7261da177e4SLinus Torvalds } 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds /* What is the scope of 'addr'? */ 7291c662018SXin Long static enum sctp_scope sctp_v6_scope(union sctp_addr *addr) 7301da177e4SLinus Torvalds { 7311c662018SXin Long enum sctp_scope retval; 7321da177e4SLinus Torvalds int v6scope; 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds /* The IPv6 scope is really a set of bit fields. 7351da177e4SLinus Torvalds * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. 7361da177e4SLinus Torvalds */ 7371da177e4SLinus Torvalds 7381da177e4SLinus Torvalds v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); 7391da177e4SLinus Torvalds switch (v6scope) { 7401da177e4SLinus Torvalds case IFA_HOST: 7411da177e4SLinus Torvalds retval = SCTP_SCOPE_LOOPBACK; 7421da177e4SLinus Torvalds break; 7431da177e4SLinus Torvalds case IFA_LINK: 7441da177e4SLinus Torvalds retval = SCTP_SCOPE_LINK; 7451da177e4SLinus Torvalds break; 7461da177e4SLinus Torvalds case IFA_SITE: 7471da177e4SLinus Torvalds retval = SCTP_SCOPE_PRIVATE; 7481da177e4SLinus Torvalds break; 7491da177e4SLinus Torvalds default: 7501da177e4SLinus Torvalds retval = SCTP_SCOPE_GLOBAL; 7511da177e4SLinus Torvalds break; 7523ff50b79SStephen Hemminger } 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds return retval; 7551da177e4SLinus Torvalds } 7561da177e4SLinus Torvalds 7571da177e4SLinus Torvalds /* Create and initialize a new sk for the socket to be returned by accept(). */ 7581da177e4SLinus Torvalds static struct sock *sctp_v6_create_accept_sk(struct sock *sk, 759cdfbabfbSDavid Howells struct sctp_association *asoc, 760cdfbabfbSDavid Howells bool kern) 7611da177e4SLinus Torvalds { 7621da177e4SLinus Torvalds struct sock *newsk; 7631da177e4SLinus Torvalds struct ipv6_pinfo *newnp, *np = inet6_sk(sk); 7641da177e4SLinus Torvalds struct sctp6_sock *newsctp6sk; 7651da177e4SLinus Torvalds 766cdfbabfbSDavid Howells newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot, kern); 7671da177e4SLinus Torvalds if (!newsk) 7681da177e4SLinus Torvalds goto out; 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds sock_init_data(NULL, newsk); 7711da177e4SLinus Torvalds 772914e1c8bSVlad Yasevich sctp_copy_sock(newsk, sk, asoc); 7731da177e4SLinus Torvalds sock_reset_flag(sk, SOCK_ZAPPED); 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds newsctp6sk = (struct sctp6_sock *)newsk; 7761da177e4SLinus Torvalds inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; 7771da177e4SLinus Torvalds 778b225b884SDave Johnson sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; 779b225b884SDave Johnson 7801da177e4SLinus Torvalds newnp = inet6_sk(newsk); 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds memcpy(newnp, np, sizeof(struct ipv6_pinfo)); 783fdcee2cbSEric Dumazet newnp->ipv6_mc_list = NULL; 784fdcee2cbSEric Dumazet newnp->ipv6_ac_list = NULL; 785fdcee2cbSEric Dumazet newnp->ipv6_fl_list = NULL; 7861da177e4SLinus Torvalds 787b7e10c25SRichard Haines sctp_v6_copy_ip_options(sk, newsk); 7889470e24fSEric Dumazet 7891da177e4SLinus Torvalds /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() 7901da177e4SLinus Torvalds * and getpeername(). 7911da177e4SLinus Torvalds */ 7921da177e4SLinus Torvalds sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); 7931da177e4SLinus Torvalds 794661dbf34SMatija Glavinic Pecotic newsk->sk_v6_rcv_saddr = sk->sk_v6_rcv_saddr; 795661dbf34SMatija Glavinic Pecotic 796e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(newsk); 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds if (newsk->sk_prot->init(newsk)) { 7991da177e4SLinus Torvalds sk_common_release(newsk); 8001da177e4SLinus Torvalds newsk = NULL; 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds out: 8041da177e4SLinus Torvalds return newsk; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 807299ee123SJason Gunthorpe /* Format a sockaddr for return to user space. This makes sure the return is 808299ee123SJason Gunthorpe * AF_INET or AF_INET6 depending on the SCTP_I_WANT_MAPPED_V4_ADDR option. 809299ee123SJason Gunthorpe */ 810299ee123SJason Gunthorpe static int sctp_v6_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr) 8111da177e4SLinus Torvalds { 812299ee123SJason Gunthorpe if (sp->v4mapped) { 813299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET) 8141da177e4SLinus Torvalds sctp_v4_map_v6(addr); 815299ee123SJason Gunthorpe } else { 816299ee123SJason Gunthorpe if (addr->sa.sa_family == AF_INET6 && 817299ee123SJason Gunthorpe ipv6_addr_v4mapped(&addr->v6.sin6_addr)) 818299ee123SJason Gunthorpe sctp_v6_map_v4(addr); 819299ee123SJason Gunthorpe } 820299ee123SJason Gunthorpe 8216780db24SEric Dumazet if (addr->sa.sa_family == AF_INET) { 8226780db24SEric Dumazet memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero)); 823299ee123SJason Gunthorpe return sizeof(struct sockaddr_in); 8246780db24SEric Dumazet } 825299ee123SJason Gunthorpe return sizeof(struct sockaddr_in6); 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds /* Where did this skb come from? */ 8291da177e4SLinus Torvalds static int sctp_v6_skb_iif(const struct sk_buff *skb) 8301da177e4SLinus Torvalds { 8311f45f78fSMarcelo Ricardo Leitner return IP6CB(skb)->iif; 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds /* Was this packet marked by Explicit Congestion Notification? */ 8351da177e4SLinus Torvalds static int sctp_v6_is_ce(const struct sk_buff *skb) 8361da177e4SLinus Torvalds { 837978aa047SXin Long return *((__u32 *)(ipv6_hdr(skb))) & (__force __u32)htonl(1 << 20); 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds /* Dump the v6 addr to the seq file. */ 8411da177e4SLinus Torvalds static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) 8421da177e4SLinus Torvalds { 8435b095d98SHarvey Harrison seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr); 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds 846b9031d9dSVlad Yasevich static void sctp_v6_ecn_capable(struct sock *sk) 847b9031d9dSVlad Yasevich { 848b9031d9dSVlad Yasevich inet6_sk(sk)->tclass |= INET_ECN_ECT_0; 849b9031d9dSVlad Yasevich } 850b9031d9dSVlad Yasevich 8511da177e4SLinus Torvalds /* Initialize a PF_INET msgname from a ulpevent. */ 8521da177e4SLinus Torvalds static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, 8531da177e4SLinus Torvalds char *msgname, int *addrlen) 8541da177e4SLinus Torvalds { 8551da177e4SLinus Torvalds union sctp_addr *addr; 8561da177e4SLinus Torvalds struct sctp_association *asoc; 857299ee123SJason Gunthorpe union sctp_addr *paddr; 8581da177e4SLinus Torvalds 859299ee123SJason Gunthorpe if (!msgname) 8601da177e4SLinus Torvalds return; 861299ee123SJason Gunthorpe 862299ee123SJason Gunthorpe addr = (union sctp_addr *)msgname; 863299ee123SJason Gunthorpe asoc = event->asoc; 864299ee123SJason Gunthorpe paddr = &asoc->peer.primary_addr; 865299ee123SJason Gunthorpe 866299ee123SJason Gunthorpe if (paddr->sa.sa_family == AF_INET) { 867299ee123SJason Gunthorpe addr->v4.sin_family = AF_INET; 868299ee123SJason Gunthorpe addr->v4.sin_port = htons(asoc->peer.port); 869299ee123SJason Gunthorpe addr->v4.sin_addr = paddr->v4.sin_addr; 870299ee123SJason Gunthorpe } else { 871299ee123SJason Gunthorpe addr->v6.sin6_family = AF_INET6; 872299ee123SJason Gunthorpe addr->v6.sin6_flowinfo = 0; 873299ee123SJason Gunthorpe if (ipv6_addr_type(&paddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 874299ee123SJason Gunthorpe addr->v6.sin6_scope_id = paddr->v6.sin6_scope_id; 875299ee123SJason Gunthorpe else 876299ee123SJason Gunthorpe addr->v6.sin6_scope_id = 0; 877299ee123SJason Gunthorpe addr->v6.sin6_port = htons(asoc->peer.port); 878299ee123SJason Gunthorpe addr->v6.sin6_addr = paddr->v6.sin6_addr; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds 881299ee123SJason Gunthorpe *addrlen = sctp_v6_addr_to_user(sctp_sk(asoc->base.sk), addr); 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds /* Initialize a msg_name from an inbound skb. */ 8851da177e4SLinus Torvalds static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, 8861da177e4SLinus Torvalds int *addr_len) 8871da177e4SLinus Torvalds { 888299ee123SJason Gunthorpe union sctp_addr *addr; 8891da177e4SLinus Torvalds struct sctphdr *sh; 8901da177e4SLinus Torvalds 891299ee123SJason Gunthorpe if (!msgname) 8921da177e4SLinus Torvalds return; 893299ee123SJason Gunthorpe 894299ee123SJason Gunthorpe addr = (union sctp_addr *)msgname; 895299ee123SJason Gunthorpe sh = sctp_hdr(skb); 896299ee123SJason Gunthorpe 897299ee123SJason Gunthorpe if (ip_hdr(skb)->version == 4) { 898299ee123SJason Gunthorpe addr->v4.sin_family = AF_INET; 899299ee123SJason Gunthorpe addr->v4.sin_port = sh->source; 900299ee123SJason Gunthorpe addr->v4.sin_addr.s_addr = ip_hdr(skb)->saddr; 901299ee123SJason Gunthorpe } else { 902299ee123SJason Gunthorpe addr->v6.sin6_family = AF_INET6; 903299ee123SJason Gunthorpe addr->v6.sin6_flowinfo = 0; 904299ee123SJason Gunthorpe addr->v6.sin6_port = sh->source; 905299ee123SJason Gunthorpe addr->v6.sin6_addr = ipv6_hdr(skb)->saddr; 9067c8a61d9SEric W. Biederman if (ipv6_addr_type(&addr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 9071f45f78fSMarcelo Ricardo Leitner addr->v6.sin6_scope_id = sctp_v6_skb_iif(skb); 9087c8a61d9SEric W. Biederman else 9097c8a61d9SEric W. Biederman addr->v6.sin6_scope_id = 0; 9101da177e4SLinus Torvalds } 9111da177e4SLinus Torvalds 912299ee123SJason Gunthorpe *addr_len = sctp_v6_addr_to_user(sctp_sk(skb->sk), addr); 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds /* Do we support this AF? */ 9161da177e4SLinus Torvalds static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) 9171da177e4SLinus Torvalds { 9181da177e4SLinus Torvalds switch (family) { 9191da177e4SLinus Torvalds case AF_INET6: 9201da177e4SLinus Torvalds return 1; 9211da177e4SLinus Torvalds /* v4-mapped-v6 addresses */ 9221da177e4SLinus Torvalds case AF_INET: 9237dab83deSVlad Yasevich if (!__ipv6_only_sock(sctp_opt2sk(sp))) 9241da177e4SLinus Torvalds return 1; 925df561f66SGustavo A. R. Silva fallthrough; 9261da177e4SLinus Torvalds default: 9271da177e4SLinus Torvalds return 0; 9281da177e4SLinus Torvalds } 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds /* Address matching with wildcards allowed. This extra level 9321da177e4SLinus Torvalds * of indirection lets us choose whether a PF_INET6 should 9331da177e4SLinus Torvalds * disallow any v4 addresses if we so choose. 9341da177e4SLinus Torvalds */ 9351da177e4SLinus Torvalds static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, 9361da177e4SLinus Torvalds const union sctp_addr *addr2, 9371da177e4SLinus Torvalds struct sctp_sock *opt) 9381da177e4SLinus Torvalds { 93952cae8f0SVlad Yasevich struct sock *sk = sctp_opt2sk(opt); 9401071ec9dSXin Long struct sctp_af *af1, *af2; 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds af1 = sctp_get_af_specific(addr1->sa.sa_family); 9431da177e4SLinus Torvalds af2 = sctp_get_af_specific(addr2->sa.sa_family); 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds if (!af1 || !af2) 9461da177e4SLinus Torvalds return 0; 9477dab83deSVlad Yasevich 9487dab83deSVlad Yasevich /* If the socket is IPv6 only, v4 addrs will not match */ 94952cae8f0SVlad Yasevich if (__ipv6_only_sock(sk) && af1 != af2) 9507dab83deSVlad Yasevich return 0; 9517dab83deSVlad Yasevich 9521da177e4SLinus Torvalds /* Today, wildcard AF_INET/AF_INET6. */ 95352cae8f0SVlad Yasevich if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) 9541da177e4SLinus Torvalds return 1; 9551da177e4SLinus Torvalds 956d625329bSXin Long if (addr1->sa.sa_family == AF_INET && addr2->sa.sa_family == AF_INET) 957d625329bSXin Long return addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr; 958d625329bSXin Long 9591071ec9dSXin Long return __sctp_v6_cmp_addr(addr1, addr2); 9601da177e4SLinus Torvalds } 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds /* Verify that the provided sockaddr looks bindable. Common verification, 9631da177e4SLinus Torvalds * has already been taken care of. 9641da177e4SLinus Torvalds */ 9651da177e4SLinus Torvalds static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) 9661da177e4SLinus Torvalds { 9671da177e4SLinus Torvalds struct sctp_af *af; 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 9701da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 9711da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 9721da177e4SLinus Torvalds else { 9731da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 9746a6ddb2aSSridhar Samudrala struct net_device *dev; 9751da177e4SLinus Torvalds 9766a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 977bb2db45bSEric W. Biederman struct net *net; 9786a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 9791da177e4SLinus Torvalds return 0; 980bb2db45bSEric W. Biederman net = sock_net(&opt->inet.sk); 98140c9c31eSEric Dumazet rcu_read_lock(); 982bb2db45bSEric W. Biederman dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id); 983630e4576SMaciej Żenczykowski if (!dev || !(ipv6_can_nonlocal_bind(net, &opt->inet) || 984b71d21c2SLaszlo Toth ipv6_chk_addr(net, &addr->v6.sin6_addr, 985b71d21c2SLaszlo Toth dev, 0))) { 98640c9c31eSEric Dumazet rcu_read_unlock(); 9871669d857SVlad Yasevich return 0; 9881669d857SVlad Yasevich } 98940c9c31eSEric Dumazet rcu_read_unlock(); 9901da177e4SLinus Torvalds } 9917dab83deSVlad Yasevich 9921da177e4SLinus Torvalds af = opt->pf->af; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds return af->available(addr, opt); 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 9976a6ddb2aSSridhar Samudrala /* Verify that the provided sockaddr looks sendable. Common verification, 9981da177e4SLinus Torvalds * has already been taken care of. 9991da177e4SLinus Torvalds */ 10001da177e4SLinus Torvalds static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) 10011da177e4SLinus Torvalds { 10021da177e4SLinus Torvalds struct sctp_af *af = NULL; 10031da177e4SLinus Torvalds 10041da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 10051da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 10061da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 10071da177e4SLinus Torvalds else { 10081da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 10096a6ddb2aSSridhar Samudrala struct net_device *dev; 10101da177e4SLinus Torvalds 10116a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 10126a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 10131da177e4SLinus Torvalds return 0; 101440c9c31eSEric Dumazet rcu_read_lock(); 1015bb2db45bSEric W. Biederman dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk), 101640c9c31eSEric Dumazet addr->v6.sin6_scope_id); 101740c9c31eSEric Dumazet rcu_read_unlock(); 10186a6ddb2aSSridhar Samudrala if (!dev) 10196a6ddb2aSSridhar Samudrala return 0; 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds af = opt->pf->af; 10221da177e4SLinus Torvalds } 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds return af != NULL; 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds /* Fill in Supported Address Type information for INIT and INIT-ACK 10281da177e4SLinus Torvalds * chunks. Note: In the future, we may want to look at sock options 10291da177e4SLinus Torvalds * to determine whether a PF_INET6 socket really wants to have IPV4 10301da177e4SLinus Torvalds * addresses. 10311da177e4SLinus Torvalds * Returns number of addresses supported. 10321da177e4SLinus Torvalds */ 10331da177e4SLinus Torvalds static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, 10343dbe8656SAl Viro __be16 *types) 10351da177e4SLinus Torvalds { 10367dab83deSVlad Yasevich types[0] = SCTP_PARAM_IPV6_ADDRESS; 10377dab83deSVlad Yasevich if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { 10387dab83deSVlad Yasevich types[1] = SCTP_PARAM_IPV4_ADDRESS; 10391da177e4SLinus Torvalds return 2; 10401da177e4SLinus Torvalds } 10417dab83deSVlad Yasevich return 1; 10427dab83deSVlad Yasevich } 10431da177e4SLinus Torvalds 1044299ee123SJason Gunthorpe /* Handle SCTP_I_WANT_MAPPED_V4_ADDR for getpeername() and getsockname() */ 1045299ee123SJason Gunthorpe static int sctp_getname(struct socket *sock, struct sockaddr *uaddr, 10469b2c45d4SDenys Vlasenko int peer) 1047299ee123SJason Gunthorpe { 1048299ee123SJason Gunthorpe int rc; 1049299ee123SJason Gunthorpe 10509b2c45d4SDenys Vlasenko rc = inet6_getname(sock, uaddr, peer); 1051299ee123SJason Gunthorpe 10529b2c45d4SDenys Vlasenko if (rc < 0) 1053299ee123SJason Gunthorpe return rc; 1054299ee123SJason Gunthorpe 10559b2c45d4SDenys Vlasenko rc = sctp_v6_addr_to_user(sctp_sk(sock->sk), 1056299ee123SJason Gunthorpe (union sctp_addr *)uaddr); 1057299ee123SJason Gunthorpe 1058299ee123SJason Gunthorpe return rc; 1059299ee123SJason Gunthorpe } 1060299ee123SJason Gunthorpe 106190ddc4f0SEric Dumazet static const struct proto_ops inet6_seqpacket_ops = { 10621da177e4SLinus Torvalds .family = PF_INET6, 10631da177e4SLinus Torvalds .owner = THIS_MODULE, 10641da177e4SLinus Torvalds .release = inet6_release, 10651da177e4SLinus Torvalds .bind = inet6_bind, 1066644fbdeaSXin Long .connect = sctp_inet_connect, 10671da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 10681da177e4SLinus Torvalds .accept = inet_accept, 1069299ee123SJason Gunthorpe .getname = sctp_getname, 1070a11e1d43SLinus Torvalds .poll = sctp_poll, 10711da177e4SLinus Torvalds .ioctl = inet6_ioctl, 1072c7cbdbf2SArnd Bergmann .gettstamp = sock_gettstamp, 10731da177e4SLinus Torvalds .listen = sctp_inet_listen, 10741da177e4SLinus Torvalds .shutdown = inet_shutdown, 10751da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 10761da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 1077543d9cfeSArnaldo Carvalho de Melo .sendmsg = inet_sendmsg, 1078fd2d180aSXin Long .recvmsg = inet_recvmsg, 1079543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 10803fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 10813986912fSChristoph Hellwig .compat_ioctl = inet6_compat_ioctl, 10823fdadf7dSDmitry Mishin #endif 10831da177e4SLinus Torvalds }; 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds static struct inet_protosw sctpv6_seqpacket_protosw = { 10861da177e4SLinus Torvalds .type = SOCK_SEQPACKET, 10871da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 10881da177e4SLinus Torvalds .prot = &sctpv6_prot, 10891da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 10901da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG 10911da177e4SLinus Torvalds }; 10921da177e4SLinus Torvalds static struct inet_protosw sctpv6_stream_protosw = { 10931da177e4SLinus Torvalds .type = SOCK_STREAM, 10941da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 10951da177e4SLinus Torvalds .prot = &sctpv6_prot, 10961da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 10971da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG, 10981da177e4SLinus Torvalds }; 10991da177e4SLinus Torvalds 1100e5bbef20SHerbert Xu static int sctp6_rcv(struct sk_buff *skb) 11011da177e4SLinus Torvalds { 11020356010dSXin Long SCTP_INPUT_CB(skb)->encap_port = 0; 1103e5bbef20SHerbert Xu return sctp_rcv(skb) ? -1 : 0; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds 110641135cc8SAlexey Dobriyan static const struct inet6_protocol sctpv6_protocol = { 11071da177e4SLinus Torvalds .handler = sctp6_rcv, 11081da177e4SLinus Torvalds .err_handler = sctp_v6_err, 11091da177e4SLinus Torvalds .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, 11101da177e4SLinus Torvalds }; 11111da177e4SLinus Torvalds 111215efbe76SNeil Horman static struct sctp_af sctp_af_inet6 = { 1113543d9cfeSArnaldo Carvalho de Melo .sa_family = AF_INET6, 11141da177e4SLinus Torvalds .sctp_xmit = sctp_v6_xmit, 11151da177e4SLinus Torvalds .setsockopt = ipv6_setsockopt, 11161da177e4SLinus Torvalds .getsockopt = ipv6_getsockopt, 11171da177e4SLinus Torvalds .get_dst = sctp_v6_get_dst, 11181da177e4SLinus Torvalds .get_saddr = sctp_v6_get_saddr, 11191da177e4SLinus Torvalds .copy_addrlist = sctp_v6_copy_addrlist, 11201da177e4SLinus Torvalds .from_skb = sctp_v6_from_skb, 11211da177e4SLinus Torvalds .from_sk = sctp_v6_from_sk, 11221da177e4SLinus Torvalds .from_addr_param = sctp_v6_from_addr_param, 11231da177e4SLinus Torvalds .to_addr_param = sctp_v6_to_addr_param, 11241da177e4SLinus Torvalds .cmp_addr = sctp_v6_cmp_addr, 11251da177e4SLinus Torvalds .scope = sctp_v6_scope, 11261da177e4SLinus Torvalds .addr_valid = sctp_v6_addr_valid, 11271da177e4SLinus Torvalds .inaddr_any = sctp_v6_inaddr_any, 11281da177e4SLinus Torvalds .is_any = sctp_v6_is_any, 11291da177e4SLinus Torvalds .available = sctp_v6_available, 11301da177e4SLinus Torvalds .skb_iif = sctp_v6_skb_iif, 11311da177e4SLinus Torvalds .is_ce = sctp_v6_is_ce, 11321da177e4SLinus Torvalds .seq_dump_addr = sctp_v6_seq_dump_addr, 1133b9031d9dSVlad Yasevich .ecn_capable = sctp_v6_ecn_capable, 11341da177e4SLinus Torvalds .net_header_len = sizeof(struct ipv6hdr), 11351da177e4SLinus Torvalds .sockaddr_len = sizeof(struct sockaddr_in6), 1136b7e10c25SRichard Haines .ip_options_len = sctp_v6_ip_options_len, 11371da177e4SLinus Torvalds }; 11381da177e4SLinus Torvalds 113915efbe76SNeil Horman static struct sctp_pf sctp_pf_inet6 = { 11401da177e4SLinus Torvalds .event_msgname = sctp_inet6_event_msgname, 11411da177e4SLinus Torvalds .skb_msgname = sctp_inet6_skb_msgname, 11421da177e4SLinus Torvalds .af_supported = sctp_inet6_af_supported, 11431da177e4SLinus Torvalds .cmp_addr = sctp_inet6_cmp_addr, 11441da177e4SLinus Torvalds .bind_verify = sctp_inet6_bind_verify, 11451da177e4SLinus Torvalds .send_verify = sctp_inet6_send_verify, 11461da177e4SLinus Torvalds .supported_addrs = sctp_inet6_supported_addrs, 11471da177e4SLinus Torvalds .create_accept_sk = sctp_v6_create_accept_sk, 1148299ee123SJason Gunthorpe .addr_to_user = sctp_v6_addr_to_user, 1149299ee123SJason Gunthorpe .to_sk_saddr = sctp_v6_to_sk_saddr, 1150299ee123SJason Gunthorpe .to_sk_daddr = sctp_v6_to_sk_daddr, 1151b7e10c25SRichard Haines .copy_ip_options = sctp_v6_copy_ip_options, 115215efbe76SNeil Horman .af = &sctp_af_inet6, 11531da177e4SLinus Torvalds }; 11541da177e4SLinus Torvalds 1155827bf122SSridhar Samudrala /* Initialize IPv6 support and register with socket layer. */ 1156270637abSVlad Yasevich void sctp_v6_pf_init(void) 11571da177e4SLinus Torvalds { 11581da177e4SLinus Torvalds /* Register the SCTP specific PF_INET6 functions. */ 115915efbe76SNeil Horman sctp_register_pf(&sctp_pf_inet6, PF_INET6); 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds /* Register the SCTP specific AF_INET6 functions. */ 116215efbe76SNeil Horman sctp_register_af(&sctp_af_inet6); 1163270637abSVlad Yasevich } 1164270637abSVlad Yasevich 1165270637abSVlad Yasevich void sctp_v6_pf_exit(void) 1166270637abSVlad Yasevich { 1167270637abSVlad Yasevich list_del(&sctp_af_inet6.list); 1168270637abSVlad Yasevich } 1169270637abSVlad Yasevich 1170270637abSVlad Yasevich /* Initialize IPv6 support and register with socket layer. */ 1171270637abSVlad Yasevich int sctp_v6_protosw_init(void) 1172270637abSVlad Yasevich { 1173270637abSVlad Yasevich int rc; 11741da177e4SLinus Torvalds 1175827bf122SSridhar Samudrala rc = proto_register(&sctpv6_prot, 1); 1176827bf122SSridhar Samudrala if (rc) 1177827bf122SSridhar Samudrala return rc; 1178827bf122SSridhar Samudrala 1179827bf122SSridhar Samudrala /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ 1180827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_seqpacket_protosw); 1181827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_stream_protosw); 1182827bf122SSridhar Samudrala 1183827bf122SSridhar Samudrala return 0; 1184827bf122SSridhar Samudrala } 1185827bf122SSridhar Samudrala 1186270637abSVlad Yasevich void sctp_v6_protosw_exit(void) 1187270637abSVlad Yasevich { 1188270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_seqpacket_protosw); 1189270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_stream_protosw); 1190270637abSVlad Yasevich proto_unregister(&sctpv6_prot); 1191270637abSVlad Yasevich } 1192270637abSVlad Yasevich 1193270637abSVlad Yasevich 1194827bf122SSridhar Samudrala /* Register with inet6 layer. */ 1195827bf122SSridhar Samudrala int sctp_v6_add_protocol(void) 1196827bf122SSridhar Samudrala { 11971da177e4SLinus Torvalds /* Register notifier for inet6 address additions/deletions. */ 11981da177e4SLinus Torvalds register_inet6addr_notifier(&sctp_inet6addr_notifier); 1199827bf122SSridhar Samudrala 1200827bf122SSridhar Samudrala if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) 1201827bf122SSridhar Samudrala return -EAGAIN; 1202827bf122SSridhar Samudrala 1203827bf122SSridhar Samudrala return 0; 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds 1206827bf122SSridhar Samudrala /* Unregister with inet6 layer. */ 1207827bf122SSridhar Samudrala void sctp_v6_del_protocol(void) 1208827bf122SSridhar Samudrala { 1209827bf122SSridhar Samudrala inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); 1210827bf122SSridhar Samudrala unregister_inet6addr_notifier(&sctp_inet6addr_notifier); 12111da177e4SLinus Torvalds } 1212