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 241da177e4SLinus Torvalds * along with GNU CC; see the file COPYING. If not, write to 251da177e4SLinus Torvalds * the Free Software Foundation, 59 Temple Place - Suite 330, 261da177e4SLinus Torvalds * Boston, MA 02111-1307, USA. 271da177e4SLinus Torvalds * 281da177e4SLinus Torvalds * Please send any bug reports or fixes you make to the 291da177e4SLinus Torvalds * email address(es): 301da177e4SLinus Torvalds * lksctp developers <lksctp-developers@lists.sourceforge.net> 311da177e4SLinus Torvalds * 321da177e4SLinus Torvalds * Or submit a bug report through the following website: 331da177e4SLinus Torvalds * http://www.sf.net/projects/lksctp 341da177e4SLinus Torvalds * 351da177e4SLinus Torvalds * Written or modified by: 361da177e4SLinus Torvalds * Le Yanqun <yanqun.le@nokia.com> 371da177e4SLinus Torvalds * Hui Huang <hui.huang@nokia.com> 381da177e4SLinus Torvalds * La Monte H.P. Yarroll <piggy@acm.org> 391da177e4SLinus Torvalds * Sridhar Samudrala <sri@us.ibm.com> 401da177e4SLinus Torvalds * Jon Grimm <jgrimm@us.ibm.com> 411da177e4SLinus Torvalds * Ardelle Fan <ardelle.fan@intel.com> 421da177e4SLinus Torvalds * 431da177e4SLinus Torvalds * Based on: 441da177e4SLinus Torvalds * linux/net/ipv6/tcp_ipv6.c 451da177e4SLinus Torvalds * 461da177e4SLinus Torvalds * Any bugs reported given to us we will try to fix... any fixes shared will 471da177e4SLinus Torvalds * be incorporated into the next SCTP release. 481da177e4SLinus Torvalds */ 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds #include <linux/module.h> 511da177e4SLinus Torvalds #include <linux/errno.h> 521da177e4SLinus Torvalds #include <linux/types.h> 531da177e4SLinus Torvalds #include <linux/socket.h> 541da177e4SLinus Torvalds #include <linux/sockios.h> 551da177e4SLinus Torvalds #include <linux/net.h> 561da177e4SLinus Torvalds #include <linux/in.h> 571da177e4SLinus Torvalds #include <linux/in6.h> 581da177e4SLinus Torvalds #include <linux/netdevice.h> 591da177e4SLinus Torvalds #include <linux/init.h> 601da177e4SLinus Torvalds #include <linux/ipsec.h> 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds #include <linux/ipv6.h> 631da177e4SLinus Torvalds #include <linux/icmpv6.h> 641da177e4SLinus Torvalds #include <linux/random.h> 651da177e4SLinus Torvalds #include <linux/seq_file.h> 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds #include <net/protocol.h> 681da177e4SLinus Torvalds #include <net/ndisc.h> 69c752f073SArnaldo Carvalho de Melo #include <net/ip.h> 701da177e4SLinus Torvalds #include <net/ipv6.h> 711da177e4SLinus Torvalds #include <net/transp_v6.h> 721da177e4SLinus Torvalds #include <net/addrconf.h> 731da177e4SLinus Torvalds #include <net/ip6_route.h> 741da177e4SLinus Torvalds #include <net/inet_common.h> 751da177e4SLinus Torvalds #include <net/inet_ecn.h> 761da177e4SLinus Torvalds #include <net/sctp/sctp.h> 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds #include <asm/uaccess.h> 791da177e4SLinus Torvalds 8029303547SVlad Yasevich /* Event handler for inet6 address addition/deletion events. 8129303547SVlad Yasevich * The sctp_local_addr_list needs to be protocted by a spin lock since 8229303547SVlad Yasevich * multiple notifiers (say IPv4 and IPv6) may be running at the same 8329303547SVlad Yasevich * time and thus corrupt the list. 8429303547SVlad Yasevich * The reader side is protected with RCU. 8529303547SVlad Yasevich */ 8624123186SAdrian Bunk static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, 8729c7cf96SSridhar Samudrala void *ptr) 8829c7cf96SSridhar Samudrala { 8929c7cf96SSridhar Samudrala struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 9029303547SVlad Yasevich struct sctp_sockaddr_entry *addr = NULL; 9129303547SVlad Yasevich struct sctp_sockaddr_entry *temp; 9222626216SChidambar 'ilLogict' Zinnoury int found = 0; 9329c7cf96SSridhar Samudrala 9429c7cf96SSridhar Samudrala switch (ev) { 9529c7cf96SSridhar Samudrala case NETDEV_UP: 9629c7cf96SSridhar Samudrala addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); 9729c7cf96SSridhar Samudrala if (addr) { 9829c7cf96SSridhar Samudrala addr->a.v6.sin6_family = AF_INET6; 9929c7cf96SSridhar Samudrala addr->a.v6.sin6_port = 0; 10029c7cf96SSridhar Samudrala memcpy(&addr->a.v6.sin6_addr, &ifa->addr, 10129c7cf96SSridhar Samudrala sizeof(struct in6_addr)); 10229c7cf96SSridhar Samudrala addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; 10329303547SVlad Yasevich addr->valid = 1; 10429303547SVlad Yasevich spin_lock_bh(&sctp_local_addr_lock); 10529303547SVlad Yasevich list_add_tail_rcu(&addr->list, &sctp_local_addr_list); 10629303547SVlad Yasevich spin_unlock_bh(&sctp_local_addr_lock); 10729c7cf96SSridhar Samudrala } 10829c7cf96SSridhar Samudrala break; 10929c7cf96SSridhar Samudrala case NETDEV_DOWN: 11029303547SVlad Yasevich spin_lock_bh(&sctp_local_addr_lock); 11129303547SVlad Yasevich list_for_each_entry_safe(addr, temp, 11229303547SVlad Yasevich &sctp_local_addr_list, list) { 11329303547SVlad Yasevich if (ipv6_addr_equal(&addr->a.v6.sin6_addr, 11429303547SVlad Yasevich &ifa->addr)) { 11522626216SChidambar 'ilLogict' Zinnoury found = 1; 11629303547SVlad Yasevich addr->valid = 0; 11729303547SVlad Yasevich list_del_rcu(&addr->list); 11829c7cf96SSridhar Samudrala break; 11929c7cf96SSridhar Samudrala } 12029c7cf96SSridhar Samudrala } 12129303547SVlad Yasevich spin_unlock_bh(&sctp_local_addr_lock); 12222626216SChidambar 'ilLogict' Zinnoury if (found) 12329303547SVlad Yasevich call_rcu(&addr->rcu, sctp_local_addr_free); 12429c7cf96SSridhar Samudrala break; 12529c7cf96SSridhar Samudrala } 12629c7cf96SSridhar Samudrala 12729c7cf96SSridhar Samudrala return NOTIFY_DONE; 12829c7cf96SSridhar Samudrala } 12929c7cf96SSridhar Samudrala 1301da177e4SLinus Torvalds static struct notifier_block sctp_inet6addr_notifier = { 13129c7cf96SSridhar Samudrala .notifier_call = sctp_inet6addr_event, 1321da177e4SLinus Torvalds }; 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds /* ICMP error handler. */ 1351da177e4SLinus Torvalds SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 13604ce6909SAl Viro int type, int code, int offset, __be32 info) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds struct inet6_dev *idev; 1391da177e4SLinus Torvalds struct sock *sk; 1401da177e4SLinus Torvalds struct sctp_association *asoc; 1411da177e4SLinus Torvalds struct sctp_transport *transport; 1421da177e4SLinus Torvalds struct ipv6_pinfo *np; 1432e07fa9cSArnaldo Carvalho de Melo sk_buff_data_t saveip, savesctp; 1441da177e4SLinus Torvalds int err; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds idev = in6_dev_get(skb->dev); 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds /* Fix up skb to look at the embedded net header. */ 149b0e380b1SArnaldo Carvalho de Melo saveip = skb->network_header; 150b0e380b1SArnaldo Carvalho de Melo savesctp = skb->transport_header; 1511ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 152a27ef749SArnaldo Carvalho de Melo skb_set_transport_header(skb, offset); 153a27ef749SArnaldo Carvalho de Melo sk = sctp_err_lookup(AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); 1541da177e4SLinus Torvalds /* Put back, the original pointers. */ 155b0e380b1SArnaldo Carvalho de Melo skb->network_header = saveip; 156b0e380b1SArnaldo Carvalho de Melo skb->transport_header = savesctp; 1571da177e4SLinus Torvalds if (!sk) { 1581da177e4SLinus Torvalds ICMP6_INC_STATS_BH(idev, ICMP6_MIB_INERRORS); 1591da177e4SLinus Torvalds goto out; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* Warning: The sock lock is held. Remember to call 1631da177e4SLinus Torvalds * sctp_err_finish! 1641da177e4SLinus Torvalds */ 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds switch (type) { 1671da177e4SLinus Torvalds case ICMPV6_PKT_TOOBIG: 1681da177e4SLinus Torvalds sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); 1691da177e4SLinus Torvalds goto out_unlock; 1701da177e4SLinus Torvalds case ICMPV6_PARAMPROB: 1711da177e4SLinus Torvalds if (ICMPV6_UNK_NEXTHDR == code) { 172d1ad1ff2SSridhar Samudrala sctp_icmp_proto_unreachable(sk, asoc, transport); 1731da177e4SLinus Torvalds goto out_unlock; 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds break; 1761da177e4SLinus Torvalds default: 1771da177e4SLinus Torvalds break; 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds np = inet6_sk(sk); 1811da177e4SLinus Torvalds icmpv6_err_convert(type, code, &err); 1821da177e4SLinus Torvalds if (!sock_owned_by_user(sk) && np->recverr) { 1831da177e4SLinus Torvalds sk->sk_err = err; 1841da177e4SLinus Torvalds sk->sk_error_report(sk); 1851da177e4SLinus Torvalds } else { /* Only an error on timeout */ 1861da177e4SLinus Torvalds sk->sk_err_soft = err; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds out_unlock: 190d1ad1ff2SSridhar Samudrala sctp_err_finish(sk, asoc); 1911da177e4SLinus Torvalds out: 1921da177e4SLinus Torvalds if (likely(idev != NULL)) 1931da177e4SLinus Torvalds in6_dev_put(idev); 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds /* Based on tcp_v6_xmit() in tcp_ipv6.c. */ 1971da177e4SLinus Torvalds static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport, 1981da177e4SLinus Torvalds int ipfragok) 1991da177e4SLinus Torvalds { 2001da177e4SLinus Torvalds struct sock *sk = skb->sk; 2011da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2021da177e4SLinus Torvalds struct flowi fl; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds memset(&fl, 0, sizeof(fl)); 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds fl.proto = sk->sk_protocol; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds /* Fill in the dest address from the route entry passed with the skb 2091da177e4SLinus Torvalds * and the source address from the transport. 2101da177e4SLinus Torvalds */ 211b3f5b3b6SAl Viro ipv6_addr_copy(&fl.fl6_dst, &transport->ipaddr.v6.sin6_addr); 212a9266268SAl Viro ipv6_addr_copy(&fl.fl6_src, &transport->saddr.v6.sin6_addr); 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds fl.fl6_flowlabel = np->flow_label; 2151da177e4SLinus Torvalds IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel); 2161da177e4SLinus Torvalds if (ipv6_addr_type(&fl.fl6_src) & IPV6_ADDR_LINKLOCAL) 217a9266268SAl Viro fl.oif = transport->saddr.v6.sin6_scope_id; 2181da177e4SLinus Torvalds else 2191da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds if (np->opt && np->opt->srcrt) { 2221da177e4SLinus Torvalds struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; 2231da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, rt0->addr); 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, " 22746b86a2dSJoe Perches "src:" NIP6_FMT " dst:" NIP6_FMT "\n", 2280dc47877SHarvey Harrison __func__, skb, skb->len, 2291da177e4SLinus Torvalds NIP6(fl.fl6_src), NIP6(fl.fl6_dst)); 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS); 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds return ip6_xmit(sk, skb, &fl, np->opt, ipfragok); 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds /* Returns the dst cache entry for the given source and destination ip 2371da177e4SLinus Torvalds * addresses. 2381da177e4SLinus Torvalds */ 2391da177e4SLinus Torvalds static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc, 2401da177e4SLinus Torvalds union sctp_addr *daddr, 2411da177e4SLinus Torvalds union sctp_addr *saddr) 2421da177e4SLinus Torvalds { 2431da177e4SLinus Torvalds struct dst_entry *dst; 2441da177e4SLinus Torvalds struct flowi fl; 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds memset(&fl, 0, sizeof(fl)); 2471da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, &daddr->v6.sin6_addr); 2481da177e4SLinus Torvalds if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 2491da177e4SLinus Torvalds fl.oif = daddr->v6.sin6_scope_id; 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds 25246b86a2dSJoe Perches SCTP_DEBUG_PRINTK("%s: DST=" NIP6_FMT " ", 2530dc47877SHarvey Harrison __func__, NIP6(fl.fl6_dst)); 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds if (saddr) { 2561da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_src, &saddr->v6.sin6_addr); 2571da177e4SLinus Torvalds SCTP_DEBUG_PRINTK( 25846b86a2dSJoe Perches "SRC=" NIP6_FMT " - ", 2591da177e4SLinus Torvalds NIP6(fl.fl6_src)); 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 2624591db4fSDaniel Lezcano dst = ip6_route_output(&init_net, NULL, &fl); 2634251320fSVille Nuorvala if (!dst->error) { 2641da177e4SLinus Torvalds struct rt6_info *rt; 2651da177e4SLinus Torvalds rt = (struct rt6_info *)dst; 2661da177e4SLinus Torvalds SCTP_DEBUG_PRINTK( 26746b86a2dSJoe Perches "rt6_dst:" NIP6_FMT " rt6_src:" NIP6_FMT "\n", 2681da177e4SLinus Torvalds NIP6(rt->rt6i_dst.addr), NIP6(rt->rt6i_src.addr)); 2691da177e4SLinus Torvalds return dst; 2701da177e4SLinus Torvalds } 2714251320fSVille Nuorvala SCTP_DEBUG_PRINTK("NO ROUTE\n"); 2724251320fSVille Nuorvala dst_release(dst); 2734251320fSVille Nuorvala return NULL; 2744251320fSVille Nuorvala } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* Returns the number of consecutive initial bits that match in the 2 ipv6 2771da177e4SLinus Torvalds * addresses. 2781da177e4SLinus Torvalds */ 2791da177e4SLinus Torvalds static inline int sctp_v6_addr_match_len(union sctp_addr *s1, 2801da177e4SLinus Torvalds union sctp_addr *s2) 2811da177e4SLinus Torvalds { 2821da177e4SLinus Torvalds struct in6_addr *a1 = &s1->v6.sin6_addr; 2831da177e4SLinus Torvalds struct in6_addr *a2 = &s2->v6.sin6_addr; 2841da177e4SLinus Torvalds int i, j; 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds for (i = 0; i < 4 ; i++) { 287dbc16db1SAl Viro __be32 a1xora2; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds a1xora2 = a1->s6_addr32[i] ^ a2->s6_addr32[i]; 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds if ((j = fls(ntohl(a1xora2)))) 2921da177e4SLinus Torvalds return (i * 32 + 32 - j); 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds return (i*32); 2961da177e4SLinus Torvalds } 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds /* Fills in the source address(saddr) based on the destination address(daddr) 2991da177e4SLinus Torvalds * and asoc's bind address list. 3001da177e4SLinus Torvalds */ 3011da177e4SLinus Torvalds static void sctp_v6_get_saddr(struct sctp_association *asoc, 3021da177e4SLinus Torvalds struct dst_entry *dst, 3031da177e4SLinus Torvalds union sctp_addr *daddr, 3041da177e4SLinus Torvalds union sctp_addr *saddr) 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds struct sctp_bind_addr *bp; 3071da177e4SLinus Torvalds struct sctp_sockaddr_entry *laddr; 3081da177e4SLinus Torvalds sctp_scope_t scope; 3091da177e4SLinus Torvalds union sctp_addr *baddr = NULL; 3101da177e4SLinus Torvalds __u8 matchlen = 0; 3111da177e4SLinus Torvalds __u8 bmatchlen; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p " 31446b86a2dSJoe Perches "daddr:" NIP6_FMT " ", 3150dc47877SHarvey Harrison __func__, asoc, dst, NIP6(daddr->v6.sin6_addr)); 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds if (!asoc) { 3185e5f3f0fSYOSHIFUJI Hideaki ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, 3197cbca67cSYOSHIFUJI Hideaki &daddr->v6.sin6_addr, 3207cbca67cSYOSHIFUJI Hideaki inet6_sk(asoc->base.sk)->srcprefs, 3217cbca67cSYOSHIFUJI Hideaki &saddr->v6.sin6_addr); 32246b86a2dSJoe Perches SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: " NIP6_FMT "\n", 3231da177e4SLinus Torvalds NIP6(saddr->v6.sin6_addr)); 3241da177e4SLinus Torvalds return; 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds scope = sctp_scope(daddr); 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds bp = &asoc->base.bind_addr; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds /* Go through the bind address list and find the best source address 3321da177e4SLinus Torvalds * that matches the scope of the destination address. 3331da177e4SLinus Torvalds */ 334559cf710SVlad Yasevich rcu_read_lock(); 335559cf710SVlad Yasevich list_for_each_entry_rcu(laddr, &bp->address_list, list) { 336559cf710SVlad Yasevich if (!laddr->valid) 337559cf710SVlad Yasevich continue; 338f57d96b2SVlad Yasevich if ((laddr->state == SCTP_ADDR_SRC) && 3396244be4eSAl Viro (laddr->a.sa.sa_family == AF_INET6) && 3406244be4eSAl Viro (scope <= sctp_scope(&laddr->a))) { 341d3f7a54aSAl Viro bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); 3421da177e4SLinus Torvalds if (!baddr || (matchlen < bmatchlen)) { 343d3f7a54aSAl Viro baddr = &laddr->a; 3441da177e4SLinus Torvalds matchlen = bmatchlen; 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds if (baddr) { 3501da177e4SLinus Torvalds memcpy(saddr, baddr, sizeof(union sctp_addr)); 35146b86a2dSJoe Perches SCTP_DEBUG_PRINTK("saddr: " NIP6_FMT "\n", 3521da177e4SLinus Torvalds NIP6(saddr->v6.sin6_addr)); 3531da177e4SLinus Torvalds } else { 3541da177e4SLinus Torvalds printk(KERN_ERR "%s: asoc:%p Could not find a valid source " 35546b86a2dSJoe Perches "address for the dest:" NIP6_FMT "\n", 3560dc47877SHarvey Harrison __func__, asoc, NIP6(daddr->v6.sin6_addr)); 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 359559cf710SVlad Yasevich rcu_read_unlock(); 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds /* Make a copy of all potential local addresses. */ 3631da177e4SLinus Torvalds static void sctp_v6_copy_addrlist(struct list_head *addrlist, 3641da177e4SLinus Torvalds struct net_device *dev) 3651da177e4SLinus Torvalds { 3661da177e4SLinus Torvalds struct inet6_dev *in6_dev; 3671da177e4SLinus Torvalds struct inet6_ifaddr *ifp; 3681da177e4SLinus Torvalds struct sctp_sockaddr_entry *addr; 3691da177e4SLinus Torvalds 3708814c4b5SYOSHIFUJI Hideaki rcu_read_lock(); 3711da177e4SLinus Torvalds if ((in6_dev = __in6_dev_get(dev)) == NULL) { 3728814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 3731da177e4SLinus Torvalds return; 3741da177e4SLinus Torvalds } 3751da177e4SLinus Torvalds 376e2eb8d45SJarek Poplawski read_lock_bh(&in6_dev->lock); 3771da177e4SLinus Torvalds for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) { 3781da177e4SLinus Torvalds /* Add the address to the local list. */ 3791da177e4SLinus Torvalds addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); 3801da177e4SLinus Torvalds if (addr) { 3812a6fd78aSAl Viro addr->a.v6.sin6_family = AF_INET6; 3822a6fd78aSAl Viro addr->a.v6.sin6_port = 0; 3832a6fd78aSAl Viro addr->a.v6.sin6_addr = ifp->addr; 3842a6fd78aSAl Viro addr->a.v6.sin6_scope_id = dev->ifindex; 38529303547SVlad Yasevich addr->valid = 1; 3861da177e4SLinus Torvalds INIT_LIST_HEAD(&addr->list); 38729303547SVlad Yasevich INIT_RCU_HEAD(&addr->rcu); 3881da177e4SLinus Torvalds list_add_tail(&addr->list, addrlist); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 392e2eb8d45SJarek Poplawski read_unlock_bh(&in6_dev->lock); 3938814c4b5SYOSHIFUJI Hideaki rcu_read_unlock(); 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds /* Initialize a sockaddr_storage from in incoming skb. */ 3971da177e4SLinus Torvalds static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, 3981da177e4SLinus Torvalds int is_saddr) 3991da177e4SLinus Torvalds { 4001da177e4SLinus Torvalds void *from; 401d55c41b1SAl Viro __be16 *port; 4021da177e4SLinus Torvalds struct sctphdr *sh; 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds port = &addr->v6.sin6_port; 4051da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 4061da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* FIXME */ 4071da177e4SLinus Torvalds addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; 4081da177e4SLinus Torvalds 4092c0fd387SArnaldo Carvalho de Melo sh = sctp_hdr(skb); 4101da177e4SLinus Torvalds if (is_saddr) { 411d55c41b1SAl Viro *port = sh->source; 4120660e03fSArnaldo Carvalho de Melo from = &ipv6_hdr(skb)->saddr; 4131da177e4SLinus Torvalds } else { 414d55c41b1SAl Viro *port = sh->dest; 4150660e03fSArnaldo Carvalho de Melo from = &ipv6_hdr(skb)->daddr; 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds ipv6_addr_copy(&addr->v6.sin6_addr, from); 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds /* Initialize an sctp_addr from a socket. */ 4211da177e4SLinus Torvalds static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) 4221da177e4SLinus Torvalds { 4231da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 4247dcdbd95SAl Viro addr->v6.sin6_port = 0; 4251da177e4SLinus Torvalds addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr; 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds /* Initialize sk->sk_rcv_saddr from sctp_addr. */ 4291da177e4SLinus Torvalds static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) 4301da177e4SLinus Torvalds { 4311da177e4SLinus Torvalds if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { 4321da177e4SLinus Torvalds inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0; 4331da177e4SLinus Torvalds inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0; 4341da177e4SLinus Torvalds inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); 4351da177e4SLinus Torvalds inet6_sk(sk)->rcv_saddr.s6_addr32[3] = 4361da177e4SLinus Torvalds addr->v4.sin_addr.s_addr; 4371da177e4SLinus Torvalds } else { 4381da177e4SLinus Torvalds inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds /* Initialize sk->sk_daddr from sctp_addr. */ 4431da177e4SLinus Torvalds static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { 4461da177e4SLinus Torvalds inet6_sk(sk)->daddr.s6_addr32[0] = 0; 4471da177e4SLinus Torvalds inet6_sk(sk)->daddr.s6_addr32[1] = 0; 4481da177e4SLinus Torvalds inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff); 4491da177e4SLinus Torvalds inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; 4501da177e4SLinus Torvalds } else { 4511da177e4SLinus Torvalds inet6_sk(sk)->daddr = addr->v6.sin6_addr; 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds /* Initialize a sctp_addr from an address parameter. */ 4561da177e4SLinus Torvalds static void sctp_v6_from_addr_param(union sctp_addr *addr, 4571da177e4SLinus Torvalds union sctp_addr_param *param, 458dd86d136SAl Viro __be16 port, int iif) 4591da177e4SLinus Torvalds { 4601da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 4611da177e4SLinus Torvalds addr->v6.sin6_port = port; 4621da177e4SLinus Torvalds addr->v6.sin6_flowinfo = 0; /* BUG */ 4631da177e4SLinus Torvalds ipv6_addr_copy(&addr->v6.sin6_addr, ¶m->v6.addr); 4641da177e4SLinus Torvalds addr->v6.sin6_scope_id = iif; 4651da177e4SLinus Torvalds } 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds /* Initialize an address parameter from a sctp_addr and return the length 4681da177e4SLinus Torvalds * of the address parameter. 4691da177e4SLinus Torvalds */ 4701da177e4SLinus Torvalds static int sctp_v6_to_addr_param(const union sctp_addr *addr, 4711da177e4SLinus Torvalds union sctp_addr_param *param) 4721da177e4SLinus Torvalds { 4731da177e4SLinus Torvalds int length = sizeof(sctp_ipv6addr_param_t); 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; 476dbc16db1SAl Viro param->v6.param_hdr.length = htons(length); 4771da177e4SLinus Torvalds ipv6_addr_copy(¶m->v6.addr, &addr->v6.sin6_addr); 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds return length; 4801da177e4SLinus Torvalds } 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds /* Initialize a sctp_addr from a dst_entry. */ 4831da177e4SLinus Torvalds static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst, 484854d43a4SAl Viro __be16 port) 4851da177e4SLinus Torvalds { 4861da177e4SLinus Torvalds struct rt6_info *rt = (struct rt6_info *)dst; 4871da177e4SLinus Torvalds addr->sa.sa_family = AF_INET6; 4881da177e4SLinus Torvalds addr->v6.sin6_port = port; 4891da177e4SLinus Torvalds ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr); 4901da177e4SLinus Torvalds } 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds /* Compare addresses exactly. 4931da177e4SLinus Torvalds * v4-mapped-v6 is also in consideration. 4941da177e4SLinus Torvalds */ 4951da177e4SLinus Torvalds static int sctp_v6_cmp_addr(const union sctp_addr *addr1, 4961da177e4SLinus Torvalds const union sctp_addr *addr2) 4971da177e4SLinus Torvalds { 4981da177e4SLinus Torvalds if (addr1->sa.sa_family != addr2->sa.sa_family) { 4991da177e4SLinus Torvalds if (addr1->sa.sa_family == AF_INET && 5001da177e4SLinus Torvalds addr2->sa.sa_family == AF_INET6 && 501e773e4faSBrian Haley ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { 5021da177e4SLinus Torvalds if (addr2->v6.sin6_port == addr1->v4.sin_port && 5031da177e4SLinus Torvalds addr2->v6.sin6_addr.s6_addr32[3] == 5041da177e4SLinus Torvalds addr1->v4.sin_addr.s_addr) 5051da177e4SLinus Torvalds return 1; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds if (addr2->sa.sa_family == AF_INET && 5081da177e4SLinus Torvalds addr1->sa.sa_family == AF_INET6 && 509e773e4faSBrian Haley ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { 5101da177e4SLinus Torvalds if (addr1->v6.sin6_port == addr2->v4.sin_port && 5111da177e4SLinus Torvalds addr1->v6.sin6_addr.s6_addr32[3] == 5121da177e4SLinus Torvalds addr2->v4.sin_addr.s_addr) 5131da177e4SLinus Torvalds return 1; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds return 0; 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) 5181da177e4SLinus Torvalds return 0; 5191da177e4SLinus Torvalds /* If this is a linklocal address, compare the scope_id. */ 5201da177e4SLinus Torvalds if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { 5211da177e4SLinus Torvalds if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && 5221da177e4SLinus Torvalds (addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) { 5231da177e4SLinus Torvalds return 0; 5241da177e4SLinus Torvalds } 5251da177e4SLinus Torvalds } 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds return 1; 5281da177e4SLinus Torvalds } 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds /* Initialize addr struct to INADDR_ANY. */ 5316fbfa9f9SAl Viro static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) 5321da177e4SLinus Torvalds { 5331da177e4SLinus Torvalds memset(addr, 0x00, sizeof(union sctp_addr)); 5341da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 5351da177e4SLinus Torvalds addr->v6.sin6_port = port; 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds /* Is this a wildcard address? */ 5391da177e4SLinus Torvalds static int sctp_v6_is_any(const union sctp_addr *addr) 5401da177e4SLinus Torvalds { 541b9b9e10fSBrian Haley return ipv6_addr_any(&addr->v6.sin6_addr); 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds /* Should this be available for binding? */ 5451da177e4SLinus Torvalds static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds int type; 5481da177e4SLinus Torvalds struct in6_addr *in6 = (struct in6_addr *)&addr->v6.sin6_addr; 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds type = ipv6_addr_type(in6); 5511da177e4SLinus Torvalds if (IPV6_ADDR_ANY == type) 5521da177e4SLinus Torvalds return 1; 5531da177e4SLinus Torvalds if (type == IPV6_ADDR_MAPPED) { 5541da177e4SLinus Torvalds if (sp && !sp->v4mapped) 5551da177e4SLinus Torvalds return 0; 5561da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 5571da177e4SLinus Torvalds return 0; 5581da177e4SLinus Torvalds sctp_v6_map_v4(addr); 5591da177e4SLinus Torvalds return sctp_get_af_specific(AF_INET)->available(addr, sp); 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds if (!(type & IPV6_ADDR_UNICAST)) 5621da177e4SLinus Torvalds return 0; 5631da177e4SLinus Torvalds 564bfeade08SDaniel Lezcano return ipv6_chk_addr(&init_net, in6, NULL, 0); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds /* This function checks if the address is a valid address to be used for 5681da177e4SLinus Torvalds * SCTP. 5691da177e4SLinus Torvalds * 5701da177e4SLinus Torvalds * Output: 5711da177e4SLinus Torvalds * Return 0 - If the address is a non-unicast or an illegal address. 5721da177e4SLinus Torvalds * Return 1 - If the address is a unicast. 5731da177e4SLinus Torvalds */ 5745636bef7SVlad Yasevich static int sctp_v6_addr_valid(union sctp_addr *addr, 5755636bef7SVlad Yasevich struct sctp_sock *sp, 5765636bef7SVlad Yasevich const struct sk_buff *skb) 5771da177e4SLinus Torvalds { 5781da177e4SLinus Torvalds int ret = ipv6_addr_type(&addr->v6.sin6_addr); 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds /* Support v4-mapped-v6 address. */ 5811da177e4SLinus Torvalds if (ret == IPV6_ADDR_MAPPED) { 5821da177e4SLinus Torvalds /* Note: This routine is used in input, so v4-mapped-v6 5831da177e4SLinus Torvalds * are disallowed here when there is no sctp_sock. 5841da177e4SLinus Torvalds */ 5851da177e4SLinus Torvalds if (!sp || !sp->v4mapped) 5861da177e4SLinus Torvalds return 0; 5871da177e4SLinus Torvalds if (sp && ipv6_only_sock(sctp_opt2sk(sp))) 5881da177e4SLinus Torvalds return 0; 5891da177e4SLinus Torvalds sctp_v6_map_v4(addr); 5905636bef7SVlad Yasevich return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds /* Is this a non-unicast address */ 5941da177e4SLinus Torvalds if (!(ret & IPV6_ADDR_UNICAST)) 5951da177e4SLinus Torvalds return 0; 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds return 1; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds /* What is the scope of 'addr'? */ 6011da177e4SLinus Torvalds static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) 6021da177e4SLinus Torvalds { 6031da177e4SLinus Torvalds int v6scope; 6041da177e4SLinus Torvalds sctp_scope_t retval; 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds /* The IPv6 scope is really a set of bit fields. 6071da177e4SLinus Torvalds * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. 6081da177e4SLinus Torvalds */ 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); 6111da177e4SLinus Torvalds switch (v6scope) { 6121da177e4SLinus Torvalds case IFA_HOST: 6131da177e4SLinus Torvalds retval = SCTP_SCOPE_LOOPBACK; 6141da177e4SLinus Torvalds break; 6151da177e4SLinus Torvalds case IFA_LINK: 6161da177e4SLinus Torvalds retval = SCTP_SCOPE_LINK; 6171da177e4SLinus Torvalds break; 6181da177e4SLinus Torvalds case IFA_SITE: 6191da177e4SLinus Torvalds retval = SCTP_SCOPE_PRIVATE; 6201da177e4SLinus Torvalds break; 6211da177e4SLinus Torvalds default: 6221da177e4SLinus Torvalds retval = SCTP_SCOPE_GLOBAL; 6231da177e4SLinus Torvalds break; 6243ff50b79SStephen Hemminger } 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds return retval; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds /* Create and initialize a new sk for the socket to be returned by accept(). */ 6301da177e4SLinus Torvalds static struct sock *sctp_v6_create_accept_sk(struct sock *sk, 6311da177e4SLinus Torvalds struct sctp_association *asoc) 6321da177e4SLinus Torvalds { 6331da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 6341da177e4SLinus Torvalds struct sock *newsk; 6351da177e4SLinus Torvalds struct inet_sock *newinet; 6361da177e4SLinus Torvalds struct ipv6_pinfo *newnp, *np = inet6_sk(sk); 6371da177e4SLinus Torvalds struct sctp6_sock *newsctp6sk; 6381da177e4SLinus Torvalds 6396257ff21SPavel Emelyanov newsk = sk_alloc(sk->sk_net, PF_INET6, GFP_KERNEL, sk->sk_prot); 6401da177e4SLinus Torvalds if (!newsk) 6411da177e4SLinus Torvalds goto out; 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds sock_init_data(NULL, newsk); 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds newsk->sk_type = SOCK_STREAM; 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds newsk->sk_prot = sk->sk_prot; 6481da177e4SLinus Torvalds newsk->sk_no_check = sk->sk_no_check; 6491da177e4SLinus Torvalds newsk->sk_reuse = sk->sk_reuse; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds newsk->sk_destruct = inet_sock_destruct; 6521da177e4SLinus Torvalds newsk->sk_family = PF_INET6; 6531da177e4SLinus Torvalds newsk->sk_protocol = IPPROTO_SCTP; 6541da177e4SLinus Torvalds newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; 6551da177e4SLinus Torvalds newsk->sk_shutdown = sk->sk_shutdown; 6561da177e4SLinus Torvalds sock_reset_flag(sk, SOCK_ZAPPED); 6571da177e4SLinus Torvalds 6581da177e4SLinus Torvalds newsctp6sk = (struct sctp6_sock *)newsk; 6591da177e4SLinus Torvalds inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; 6601da177e4SLinus Torvalds 661b225b884SDave Johnson sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; 662b225b884SDave Johnson 6631da177e4SLinus Torvalds newinet = inet_sk(newsk); 6641da177e4SLinus Torvalds newnp = inet6_sk(newsk); 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds memcpy(newnp, np, sizeof(struct ipv6_pinfo)); 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() 6691da177e4SLinus Torvalds * and getpeername(). 6701da177e4SLinus Torvalds */ 6711da177e4SLinus Torvalds newinet->sport = inet->sport; 6721da177e4SLinus Torvalds newnp->saddr = np->saddr; 6731da177e4SLinus Torvalds newnp->rcv_saddr = np->rcv_saddr; 6741da177e4SLinus Torvalds newinet->dport = htons(asoc->peer.port); 6751da177e4SLinus Torvalds sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds /* Init the ipv4 part of the socket since we can have sockets 6781da177e4SLinus Torvalds * using v6 API for ipv4. 6791da177e4SLinus Torvalds */ 6801da177e4SLinus Torvalds newinet->uc_ttl = -1; 6811da177e4SLinus Torvalds newinet->mc_loop = 1; 6821da177e4SLinus Torvalds newinet->mc_ttl = 1; 6831da177e4SLinus Torvalds newinet->mc_index = 0; 6841da177e4SLinus Torvalds newinet->mc_list = NULL; 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds if (ipv4_config.no_pmtu_disc) 6871da177e4SLinus Torvalds newinet->pmtudisc = IP_PMTUDISC_DONT; 6881da177e4SLinus Torvalds else 6891da177e4SLinus Torvalds newinet->pmtudisc = IP_PMTUDISC_WANT; 6901da177e4SLinus Torvalds 691e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(newsk); 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds if (newsk->sk_prot->init(newsk)) { 6941da177e4SLinus Torvalds sk_common_release(newsk); 6951da177e4SLinus Torvalds newsk = NULL; 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds out: 6991da177e4SLinus Torvalds return newsk; 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds /* Map v4 address to mapped v6 address */ 7031da177e4SLinus Torvalds static void sctp_v6_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) 7041da177e4SLinus Torvalds { 7051da177e4SLinus Torvalds if (sp->v4mapped && AF_INET == addr->sa.sa_family) 7061da177e4SLinus Torvalds sctp_v4_map_v6(addr); 7071da177e4SLinus Torvalds } 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds /* Where did this skb come from? */ 7101da177e4SLinus Torvalds static int sctp_v6_skb_iif(const struct sk_buff *skb) 7111da177e4SLinus Torvalds { 7121da177e4SLinus Torvalds struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; 7131da177e4SLinus Torvalds return opt->iif; 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds /* Was this packet marked by Explicit Congestion Notification? */ 7171da177e4SLinus Torvalds static int sctp_v6_is_ce(const struct sk_buff *skb) 7181da177e4SLinus Torvalds { 7190660e03fSArnaldo Carvalho de Melo return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); 7201da177e4SLinus Torvalds } 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds /* Dump the v6 addr to the seq file. */ 7231da177e4SLinus Torvalds static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) 7241da177e4SLinus Torvalds { 72546b86a2dSJoe Perches seq_printf(seq, NIP6_FMT " ", NIP6(addr->v6.sin6_addr)); 7261da177e4SLinus Torvalds } 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds /* Initialize a PF_INET6 socket msg_name. */ 7291da177e4SLinus Torvalds static void sctp_inet6_msgname(char *msgname, int *addr_len) 7301da177e4SLinus Torvalds { 7311da177e4SLinus Torvalds struct sockaddr_in6 *sin6; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds sin6 = (struct sockaddr_in6 *)msgname; 7341da177e4SLinus Torvalds sin6->sin6_family = AF_INET6; 7351da177e4SLinus Torvalds sin6->sin6_flowinfo = 0; 7361da177e4SLinus Torvalds sin6->sin6_scope_id = 0; /*FIXME */ 7371da177e4SLinus Torvalds *addr_len = sizeof(struct sockaddr_in6); 7381da177e4SLinus Torvalds } 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds /* Initialize a PF_INET msgname from a ulpevent. */ 7411da177e4SLinus Torvalds static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, 7421da177e4SLinus Torvalds char *msgname, int *addrlen) 7431da177e4SLinus Torvalds { 7441da177e4SLinus Torvalds struct sockaddr_in6 *sin6, *sin6from; 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds if (msgname) { 7471da177e4SLinus Torvalds union sctp_addr *addr; 7481da177e4SLinus Torvalds struct sctp_association *asoc; 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds asoc = event->asoc; 7511da177e4SLinus Torvalds sctp_inet6_msgname(msgname, addrlen); 7521da177e4SLinus Torvalds sin6 = (struct sockaddr_in6 *)msgname; 7531da177e4SLinus Torvalds sin6->sin6_port = htons(asoc->peer.port); 7541da177e4SLinus Torvalds addr = &asoc->peer.primary_addr; 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds /* Note: If we go to a common v6 format, this code 7571da177e4SLinus Torvalds * will change. 7581da177e4SLinus Torvalds */ 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds /* Map ipv4 address into v4-mapped-on-v6 address. */ 7611da177e4SLinus Torvalds if (sctp_sk(asoc->base.sk)->v4mapped && 7621da177e4SLinus Torvalds AF_INET == addr->sa.sa_family) { 7631da177e4SLinus Torvalds sctp_v4_map_v6((union sctp_addr *)sin6); 7641da177e4SLinus Torvalds sin6->sin6_addr.s6_addr32[3] = 7651da177e4SLinus Torvalds addr->v4.sin_addr.s_addr; 7661da177e4SLinus Torvalds return; 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds sin6from = &asoc->peer.primary_addr.v6; 7701da177e4SLinus Torvalds ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr); 7711da177e4SLinus Torvalds if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 7721da177e4SLinus Torvalds sin6->sin6_scope_id = sin6from->sin6_scope_id; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds /* Initialize a msg_name from an inbound skb. */ 7771da177e4SLinus Torvalds static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, 7781da177e4SLinus Torvalds int *addr_len) 7791da177e4SLinus Torvalds { 7801da177e4SLinus Torvalds struct sctphdr *sh; 7811da177e4SLinus Torvalds struct sockaddr_in6 *sin6; 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds if (msgname) { 7841da177e4SLinus Torvalds sctp_inet6_msgname(msgname, addr_len); 7851da177e4SLinus Torvalds sin6 = (struct sockaddr_in6 *)msgname; 7862c0fd387SArnaldo Carvalho de Melo sh = sctp_hdr(skb); 7871da177e4SLinus Torvalds sin6->sin6_port = sh->source; 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds /* Map ipv4 address into v4-mapped-on-v6 address. */ 7901da177e4SLinus Torvalds if (sctp_sk(skb->sk)->v4mapped && 791eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->version == 4) { 7921da177e4SLinus Torvalds sctp_v4_map_v6((union sctp_addr *)sin6); 793eddc9ec5SArnaldo Carvalho de Melo sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; 7941da177e4SLinus Torvalds return; 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds /* Otherwise, just copy the v6 address. */ 7980660e03fSArnaldo Carvalho de Melo ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); 7991da177e4SLinus Torvalds if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { 8001da177e4SLinus Torvalds struct sctp_ulpevent *ev = sctp_skb2event(skb); 8011da177e4SLinus Torvalds sin6->sin6_scope_id = ev->iif; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds } 8041da177e4SLinus Torvalds } 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds /* Do we support this AF? */ 8071da177e4SLinus Torvalds static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) 8081da177e4SLinus Torvalds { 8091da177e4SLinus Torvalds switch (family) { 8101da177e4SLinus Torvalds case AF_INET6: 8111da177e4SLinus Torvalds return 1; 8121da177e4SLinus Torvalds /* v4-mapped-v6 addresses */ 8131da177e4SLinus Torvalds case AF_INET: 8141da177e4SLinus Torvalds if (!__ipv6_only_sock(sctp_opt2sk(sp)) && sp->v4mapped) 8151da177e4SLinus Torvalds return 1; 8161da177e4SLinus Torvalds default: 8171da177e4SLinus Torvalds return 0; 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds } 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds /* Address matching with wildcards allowed. This extra level 8221da177e4SLinus Torvalds * of indirection lets us choose whether a PF_INET6 should 8231da177e4SLinus Torvalds * disallow any v4 addresses if we so choose. 8241da177e4SLinus Torvalds */ 8251da177e4SLinus Torvalds static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, 8261da177e4SLinus Torvalds const union sctp_addr *addr2, 8271da177e4SLinus Torvalds struct sctp_sock *opt) 8281da177e4SLinus Torvalds { 8291da177e4SLinus Torvalds struct sctp_af *af1, *af2; 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds af1 = sctp_get_af_specific(addr1->sa.sa_family); 8321da177e4SLinus Torvalds af2 = sctp_get_af_specific(addr2->sa.sa_family); 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds if (!af1 || !af2) 8351da177e4SLinus Torvalds return 0; 8361da177e4SLinus Torvalds /* Today, wildcard AF_INET/AF_INET6. */ 8371da177e4SLinus Torvalds if (sctp_is_any(addr1) || sctp_is_any(addr2)) 8381da177e4SLinus Torvalds return 1; 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds if (addr1->sa.sa_family != addr2->sa.sa_family) 8411da177e4SLinus Torvalds return 0; 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds return af1->cmp_addr(addr1, addr2); 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds /* Verify that the provided sockaddr looks bindable. Common verification, 8471da177e4SLinus Torvalds * has already been taken care of. 8481da177e4SLinus Torvalds */ 8491da177e4SLinus Torvalds static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) 8501da177e4SLinus Torvalds { 8511da177e4SLinus Torvalds struct sctp_af *af; 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 8541da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 8551da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 8561da177e4SLinus Torvalds else { 8571da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 8586a6ddb2aSSridhar Samudrala struct net_device *dev; 8591da177e4SLinus Torvalds 8606a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 8616a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 8621da177e4SLinus Torvalds return 0; 863881d966bSEric W. Biederman dev = dev_get_by_index(&init_net, addr->v6.sin6_scope_id); 8646a6ddb2aSSridhar Samudrala if (!dev) 8656a6ddb2aSSridhar Samudrala return 0; 866bfeade08SDaniel Lezcano if (!ipv6_chk_addr(&init_net, &addr->v6.sin6_addr, 867bfeade08SDaniel Lezcano dev, 0)) { 8681669d857SVlad Yasevich dev_put(dev); 8691669d857SVlad Yasevich return 0; 8701669d857SVlad Yasevich } 8716a6ddb2aSSridhar Samudrala dev_put(dev); 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds af = opt->pf->af; 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds return af->available(addr, opt); 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds 8786a6ddb2aSSridhar Samudrala /* Verify that the provided sockaddr looks sendable. Common verification, 8791da177e4SLinus Torvalds * has already been taken care of. 8801da177e4SLinus Torvalds */ 8811da177e4SLinus Torvalds static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) 8821da177e4SLinus Torvalds { 8831da177e4SLinus Torvalds struct sctp_af *af = NULL; 8841da177e4SLinus Torvalds 8851da177e4SLinus Torvalds /* ASSERT: address family has already been verified. */ 8861da177e4SLinus Torvalds if (addr->sa.sa_family != AF_INET6) 8871da177e4SLinus Torvalds af = sctp_get_af_specific(addr->sa.sa_family); 8881da177e4SLinus Torvalds else { 8891da177e4SLinus Torvalds int type = ipv6_addr_type(&addr->v6.sin6_addr); 8906a6ddb2aSSridhar Samudrala struct net_device *dev; 8911da177e4SLinus Torvalds 8926a6ddb2aSSridhar Samudrala if (type & IPV6_ADDR_LINKLOCAL) { 8936a6ddb2aSSridhar Samudrala if (!addr->v6.sin6_scope_id) 8941da177e4SLinus Torvalds return 0; 895881d966bSEric W. Biederman dev = dev_get_by_index(&init_net, addr->v6.sin6_scope_id); 8966a6ddb2aSSridhar Samudrala if (!dev) 8976a6ddb2aSSridhar Samudrala return 0; 8986a6ddb2aSSridhar Samudrala dev_put(dev); 8991da177e4SLinus Torvalds } 9001da177e4SLinus Torvalds af = opt->pf->af; 9011da177e4SLinus Torvalds } 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds return af != NULL; 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds /* Fill in Supported Address Type information for INIT and INIT-ACK 9071da177e4SLinus Torvalds * chunks. Note: In the future, we may want to look at sock options 9081da177e4SLinus Torvalds * to determine whether a PF_INET6 socket really wants to have IPV4 9091da177e4SLinus Torvalds * addresses. 9101da177e4SLinus Torvalds * Returns number of addresses supported. 9111da177e4SLinus Torvalds */ 9121da177e4SLinus Torvalds static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, 9133dbe8656SAl Viro __be16 *types) 9141da177e4SLinus Torvalds { 9151da177e4SLinus Torvalds types[0] = SCTP_PARAM_IPV4_ADDRESS; 9161da177e4SLinus Torvalds types[1] = SCTP_PARAM_IPV6_ADDRESS; 9171da177e4SLinus Torvalds return 2; 9181da177e4SLinus Torvalds } 9191da177e4SLinus Torvalds 92090ddc4f0SEric Dumazet static const struct proto_ops inet6_seqpacket_ops = { 9211da177e4SLinus Torvalds .family = PF_INET6, 9221da177e4SLinus Torvalds .owner = THIS_MODULE, 9231da177e4SLinus Torvalds .release = inet6_release, 9241da177e4SLinus Torvalds .bind = inet6_bind, 9251da177e4SLinus Torvalds .connect = inet_dgram_connect, 9261da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 9271da177e4SLinus Torvalds .accept = inet_accept, 9281da177e4SLinus Torvalds .getname = inet6_getname, 9291da177e4SLinus Torvalds .poll = sctp_poll, 9301da177e4SLinus Torvalds .ioctl = inet6_ioctl, 9311da177e4SLinus Torvalds .listen = sctp_inet_listen, 9321da177e4SLinus Torvalds .shutdown = inet_shutdown, 9331da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 9341da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 935543d9cfeSArnaldo Carvalho de Melo .sendmsg = inet_sendmsg, 936543d9cfeSArnaldo Carvalho de Melo .recvmsg = sock_common_recvmsg, 937543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 9383fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 9393fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 9403fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 9413fdadf7dSDmitry Mishin #endif 9421da177e4SLinus Torvalds }; 9431da177e4SLinus Torvalds 9441da177e4SLinus Torvalds static struct inet_protosw sctpv6_seqpacket_protosw = { 9451da177e4SLinus Torvalds .type = SOCK_SEQPACKET, 9461da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 9471da177e4SLinus Torvalds .prot = &sctpv6_prot, 9481da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 9491da177e4SLinus Torvalds .capability = -1, 9501da177e4SLinus Torvalds .no_check = 0, 9511da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG 9521da177e4SLinus Torvalds }; 9531da177e4SLinus Torvalds static struct inet_protosw sctpv6_stream_protosw = { 9541da177e4SLinus Torvalds .type = SOCK_STREAM, 9551da177e4SLinus Torvalds .protocol = IPPROTO_SCTP, 9561da177e4SLinus Torvalds .prot = &sctpv6_prot, 9571da177e4SLinus Torvalds .ops = &inet6_seqpacket_ops, 9581da177e4SLinus Torvalds .capability = -1, 9591da177e4SLinus Torvalds .no_check = 0, 9601da177e4SLinus Torvalds .flags = SCTP_PROTOSW_FLAG, 9611da177e4SLinus Torvalds }; 9621da177e4SLinus Torvalds 963e5bbef20SHerbert Xu static int sctp6_rcv(struct sk_buff *skb) 9641da177e4SLinus Torvalds { 965e5bbef20SHerbert Xu return sctp_rcv(skb) ? -1 : 0; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds static struct inet6_protocol sctpv6_protocol = { 9691da177e4SLinus Torvalds .handler = sctp6_rcv, 9701da177e4SLinus Torvalds .err_handler = sctp_v6_err, 9711da177e4SLinus Torvalds .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, 9721da177e4SLinus Torvalds }; 9731da177e4SLinus Torvalds 97415efbe76SNeil Horman static struct sctp_af sctp_af_inet6 = { 975543d9cfeSArnaldo Carvalho de Melo .sa_family = AF_INET6, 9761da177e4SLinus Torvalds .sctp_xmit = sctp_v6_xmit, 9771da177e4SLinus Torvalds .setsockopt = ipv6_setsockopt, 9781da177e4SLinus Torvalds .getsockopt = ipv6_getsockopt, 9791da177e4SLinus Torvalds .get_dst = sctp_v6_get_dst, 9801da177e4SLinus Torvalds .get_saddr = sctp_v6_get_saddr, 9811da177e4SLinus Torvalds .copy_addrlist = sctp_v6_copy_addrlist, 9821da177e4SLinus Torvalds .from_skb = sctp_v6_from_skb, 9831da177e4SLinus Torvalds .from_sk = sctp_v6_from_sk, 9841da177e4SLinus Torvalds .to_sk_saddr = sctp_v6_to_sk_saddr, 9851da177e4SLinus Torvalds .to_sk_daddr = sctp_v6_to_sk_daddr, 9861da177e4SLinus Torvalds .from_addr_param = sctp_v6_from_addr_param, 9871da177e4SLinus Torvalds .to_addr_param = sctp_v6_to_addr_param, 9881da177e4SLinus Torvalds .dst_saddr = sctp_v6_dst_saddr, 9891da177e4SLinus Torvalds .cmp_addr = sctp_v6_cmp_addr, 9901da177e4SLinus Torvalds .scope = sctp_v6_scope, 9911da177e4SLinus Torvalds .addr_valid = sctp_v6_addr_valid, 9921da177e4SLinus Torvalds .inaddr_any = sctp_v6_inaddr_any, 9931da177e4SLinus Torvalds .is_any = sctp_v6_is_any, 9941da177e4SLinus Torvalds .available = sctp_v6_available, 9951da177e4SLinus Torvalds .skb_iif = sctp_v6_skb_iif, 9961da177e4SLinus Torvalds .is_ce = sctp_v6_is_ce, 9971da177e4SLinus Torvalds .seq_dump_addr = sctp_v6_seq_dump_addr, 9981da177e4SLinus Torvalds .net_header_len = sizeof(struct ipv6hdr), 9991da177e4SLinus Torvalds .sockaddr_len = sizeof(struct sockaddr_in6), 1000543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1001543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_ipv6_setsockopt, 1002543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_ipv6_getsockopt, 1003543d9cfeSArnaldo Carvalho de Melo #endif 10041da177e4SLinus Torvalds }; 10051da177e4SLinus Torvalds 100615efbe76SNeil Horman static struct sctp_pf sctp_pf_inet6 = { 10071da177e4SLinus Torvalds .event_msgname = sctp_inet6_event_msgname, 10081da177e4SLinus Torvalds .skb_msgname = sctp_inet6_skb_msgname, 10091da177e4SLinus Torvalds .af_supported = sctp_inet6_af_supported, 10101da177e4SLinus Torvalds .cmp_addr = sctp_inet6_cmp_addr, 10111da177e4SLinus Torvalds .bind_verify = sctp_inet6_bind_verify, 10121da177e4SLinus Torvalds .send_verify = sctp_inet6_send_verify, 10131da177e4SLinus Torvalds .supported_addrs = sctp_inet6_supported_addrs, 10141da177e4SLinus Torvalds .create_accept_sk = sctp_v6_create_accept_sk, 10151da177e4SLinus Torvalds .addr_v4map = sctp_v6_addr_v4map, 101615efbe76SNeil Horman .af = &sctp_af_inet6, 10171da177e4SLinus Torvalds }; 10181da177e4SLinus Torvalds 1019827bf122SSridhar Samudrala /* Initialize IPv6 support and register with socket layer. */ 1020270637abSVlad Yasevich void sctp_v6_pf_init(void) 10211da177e4SLinus Torvalds { 10221da177e4SLinus Torvalds /* Register the SCTP specific PF_INET6 functions. */ 102315efbe76SNeil Horman sctp_register_pf(&sctp_pf_inet6, PF_INET6); 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds /* Register the SCTP specific AF_INET6 functions. */ 102615efbe76SNeil Horman sctp_register_af(&sctp_af_inet6); 1027270637abSVlad Yasevich } 1028270637abSVlad Yasevich 1029270637abSVlad Yasevich void sctp_v6_pf_exit(void) 1030270637abSVlad Yasevich { 1031270637abSVlad Yasevich list_del(&sctp_af_inet6.list); 1032270637abSVlad Yasevich } 1033270637abSVlad Yasevich 1034270637abSVlad Yasevich /* Initialize IPv6 support and register with socket layer. */ 1035270637abSVlad Yasevich int sctp_v6_protosw_init(void) 1036270637abSVlad Yasevich { 1037270637abSVlad Yasevich int rc; 10381da177e4SLinus Torvalds 1039827bf122SSridhar Samudrala rc = proto_register(&sctpv6_prot, 1); 1040827bf122SSridhar Samudrala if (rc) 1041827bf122SSridhar Samudrala return rc; 1042827bf122SSridhar Samudrala 1043827bf122SSridhar Samudrala /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ 1044827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_seqpacket_protosw); 1045827bf122SSridhar Samudrala inet6_register_protosw(&sctpv6_stream_protosw); 1046827bf122SSridhar Samudrala 1047827bf122SSridhar Samudrala return 0; 1048827bf122SSridhar Samudrala } 1049827bf122SSridhar Samudrala 1050270637abSVlad Yasevich void sctp_v6_protosw_exit(void) 1051270637abSVlad Yasevich { 1052270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_seqpacket_protosw); 1053270637abSVlad Yasevich inet6_unregister_protosw(&sctpv6_stream_protosw); 1054270637abSVlad Yasevich proto_unregister(&sctpv6_prot); 1055270637abSVlad Yasevich } 1056270637abSVlad Yasevich 1057270637abSVlad Yasevich 1058827bf122SSridhar Samudrala /* Register with inet6 layer. */ 1059827bf122SSridhar Samudrala int sctp_v6_add_protocol(void) 1060827bf122SSridhar Samudrala { 10611da177e4SLinus Torvalds /* Register notifier for inet6 address additions/deletions. */ 10621da177e4SLinus Torvalds register_inet6addr_notifier(&sctp_inet6addr_notifier); 1063827bf122SSridhar Samudrala 1064827bf122SSridhar Samudrala if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) 1065827bf122SSridhar Samudrala return -EAGAIN; 1066827bf122SSridhar Samudrala 1067827bf122SSridhar Samudrala return 0; 10681da177e4SLinus Torvalds } 10691da177e4SLinus Torvalds 1070827bf122SSridhar Samudrala /* Unregister with inet6 layer. */ 1071827bf122SSridhar Samudrala void sctp_v6_del_protocol(void) 1072827bf122SSridhar Samudrala { 1073827bf122SSridhar Samudrala inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); 1074827bf122SSridhar Samudrala unregister_inet6addr_notifier(&sctp_inet6addr_notifier); 10751da177e4SLinus Torvalds } 1076