X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fsctp%2Fipv6.c;h=240dceba06e5b4eac4271436eb0e39a6b0a0941a;hb=502a2ffd7376ae27cfde6172257db0ff9d8cfec2;hp=4a6421a9fcab5a97a50b9b3474e7af213ccac810;hpb=e6848976b721eeb5551cd94673faafeef78d9f35;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 4a6421a..240dceb 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -1,20 +1,20 @@ -/* SCTP kernel reference Implementation +/* SCTP kernel implementation * (C) Copyright IBM Corp. 2002, 2004 * Copyright (c) 2001 Nokia, Inc. * Copyright (c) 2001 La Monte H.P. Yarroll * Copyright (c) 2002-2003 Intel Corp. * - * This file is part of the SCTP kernel reference Implementation + * This file is part of the SCTP kernel implementation * * SCTP over IPv6. * - * The SCTP reference implementation is free software; + * This SCTP implementation is free software; * you can redistribute it and/or modify it under the terms of * the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * - * The SCTP reference implementation is distributed in the hope that it + * This SCTP implementation is distributed in the hope that it * will be useful, but WITHOUT ANY WARRANTY; without even the implied * ************************ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. @@ -53,7 +53,6 @@ #include #include #include -#include #include #include #include @@ -66,8 +65,8 @@ #include #include -#include #include +#include #include #include #include @@ -78,38 +77,85 @@ #include -extern int sctp_inetaddr_event(struct notifier_block *, unsigned long, void *); +/* Event handler for inet6 address addition/deletion events. + * The sctp_local_addr_list needs to be protocted by a spin lock since + * multiple notifiers (say IPv4 and IPv6) may be running at the same + * time and thus corrupt the list. + * The reader side is protected with RCU. + */ +static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, + void *ptr) +{ + struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; + struct sctp_sockaddr_entry *addr = NULL; + struct sctp_sockaddr_entry *temp; + int found = 0; + + switch (ev) { + case NETDEV_UP: + addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); + if (addr) { + addr->a.v6.sin6_family = AF_INET6; + addr->a.v6.sin6_port = 0; + ipv6_addr_copy(&addr->a.v6.sin6_addr, &ifa->addr); + addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; + addr->valid = 1; + spin_lock_bh(&sctp_local_addr_lock); + list_add_tail_rcu(&addr->list, &sctp_local_addr_list); + spin_unlock_bh(&sctp_local_addr_lock); + } + break; + case NETDEV_DOWN: + spin_lock_bh(&sctp_local_addr_lock); + list_for_each_entry_safe(addr, temp, + &sctp_local_addr_list, list) { + if (addr->a.sa.sa_family == AF_INET6 && + ipv6_addr_equal(&addr->a.v6.sin6_addr, + &ifa->addr)) { + found = 1; + addr->valid = 0; + list_del_rcu(&addr->list); + break; + } + } + spin_unlock_bh(&sctp_local_addr_lock); + if (found) + call_rcu(&addr->rcu, sctp_local_addr_free); + break; + } + + return NOTIFY_DONE; +} + static struct notifier_block sctp_inet6addr_notifier = { - .notifier_call = sctp_inetaddr_event, + .notifier_call = sctp_inet6addr_event, }; /* ICMP error handler. */ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __u32 info) + u8 type, u8 code, int offset, __be32 info) { struct inet6_dev *idev; - struct ipv6hdr *iph = (struct ipv6hdr *)skb->data; - struct sctphdr *sh = (struct sctphdr *)(skb->data + offset); struct sock *sk; struct sctp_association *asoc; struct sctp_transport *transport; struct ipv6_pinfo *np; - char *saveip, *savesctp; + sk_buff_data_t saveip, savesctp; int err; idev = in6_dev_get(skb->dev); /* Fix up skb to look at the embedded net header. */ - saveip = skb->nh.raw; - savesctp = skb->h.raw; - skb->nh.ipv6h = iph; - skb->h.raw = (char *)sh; - sk = sctp_err_lookup(AF_INET6, skb, sh, &asoc, &transport); + saveip = skb->network_header; + savesctp = skb->transport_header; + skb_reset_network_header(skb); + skb_set_transport_header(skb, offset); + sk = sctp_err_lookup(AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); /* Put back, the original pointers. */ - skb->nh.raw = saveip; - skb->h.raw = savesctp; + skb->network_header = saveip; + skb->transport_header = savesctp; if (!sk) { - ICMP6_INC_STATS_BH(idev, ICMP6_MIB_INERRORS); + ICMP6_INC_STATS_BH(dev_net(skb->dev), idev, ICMP6_MIB_INERRORS); goto out; } @@ -148,8 +194,7 @@ out: } /* Based on tcp_v6_xmit() in tcp_ipv6.c. */ -static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport, - int ipfragok) +static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) { struct sock *sk = skb->sk; struct ipv6_pinfo *np = inet6_sk(sk); @@ -171,23 +216,22 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport, fl.oif = transport->saddr.v6.sin6_scope_id; else fl.oif = sk->sk_bound_dev_if; - fl.fl_ip_sport = inet_sk(sk)->sport; - fl.fl_ip_dport = transport->ipaddr.v6.sin6_port; if (np->opt && np->opt->srcrt) { struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; ipv6_addr_copy(&fl.fl6_dst, rt0->addr); } - SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, " - "src:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x " - "dst:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", - __FUNCTION__, skb, skb->len, - NIP6(fl.fl6_src), NIP6(fl.fl6_dst)); + SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", + __func__, skb, skb->len, + &fl.fl6_src, &fl.fl6_dst); SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS); - return ip6_xmit(sk, skb, &fl, np->opt, ipfragok); + if (!(transport->param_flags & SPP_PMTUD_ENABLE)) + skb->local_df = 1; + + return ip6_xmit(sk, skb, &fl, np->opt, 0); } /* Returns the dst cache entry for the given source and destination ip @@ -204,31 +248,26 @@ static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc, ipv6_addr_copy(&fl.fl6_dst, &daddr->v6.sin6_addr); if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) fl.oif = daddr->v6.sin6_scope_id; - - SCTP_DEBUG_PRINTK("%s: DST=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ", - __FUNCTION__, NIP6(fl.fl6_dst)); + + SCTP_DEBUG_PRINTK("%s: DST=%pI6 ", __func__, &fl.fl6_dst); if (saddr) { ipv6_addr_copy(&fl.fl6_src, &saddr->v6.sin6_addr); - SCTP_DEBUG_PRINTK( - "SRC=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x - ", - NIP6(fl.fl6_src)); + SCTP_DEBUG_PRINTK("SRC=%pI6 - ", &fl.fl6_src); } - dst = ip6_route_output(NULL, &fl); - if (dst) { + dst = ip6_route_output(&init_net, NULL, &fl); + if (!dst->error) { struct rt6_info *rt; rt = (struct rt6_info *)dst; - SCTP_DEBUG_PRINTK( - "rt6_dst:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x " - "rt6_src:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", - NIP6(rt->rt6i_dst.addr), NIP6(rt->rt6i_src.addr)); - } else { - SCTP_DEBUG_PRINTK("NO ROUTE\n"); + SCTP_DEBUG_PRINTK("rt6_dst:%pI6 rt6_src:%pI6\n", + &rt->rt6i_dst.addr, &rt->rt6i_src.addr); + return dst; } - - return dst; + SCTP_DEBUG_PRINTK("NO ROUTE\n"); + dst_release(dst); + return NULL; } /* Returns the number of consecutive initial bits that match in the 2 ipv6 @@ -242,7 +281,7 @@ static inline int sctp_v6_addr_match_len(union sctp_addr *s1, int i, j; for (i = 0; i < 4 ; i++) { - __u32 a1xora2; + __be32 a1xora2; a1xora2 = a1->s6_addr32[i] ^ a2->s6_addr32[i]; @@ -256,44 +295,46 @@ static inline int sctp_v6_addr_match_len(union sctp_addr *s1, /* Fills in the source address(saddr) based on the destination address(daddr) * and asoc's bind address list. */ -static void sctp_v6_get_saddr(struct sctp_association *asoc, +static void sctp_v6_get_saddr(struct sctp_sock *sk, + struct sctp_association *asoc, struct dst_entry *dst, union sctp_addr *daddr, union sctp_addr *saddr) { struct sctp_bind_addr *bp; - rwlock_t *addr_lock; struct sctp_sockaddr_entry *laddr; - struct list_head *pos; sctp_scope_t scope; union sctp_addr *baddr = NULL; __u8 matchlen = 0; __u8 bmatchlen; - SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p " - "daddr:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ", - __FUNCTION__, asoc, dst, NIP6(daddr->v6.sin6_addr)); + SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p daddr:%pI6 ", + __func__, asoc, dst, &daddr->v6.sin6_addr); if (!asoc) { - ipv6_get_saddr(dst, &daddr->v6.sin6_addr,&saddr->v6.sin6_addr); - SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: " - "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", - NIP6(saddr->v6.sin6_addr)); + ipv6_dev_get_saddr(sock_net(sctp_opt2sk(sk)), + dst ? ip6_dst_idev(dst)->dev : NULL, + &daddr->v6.sin6_addr, + inet6_sk(&sk->inet.sk)->srcprefs, + &saddr->v6.sin6_addr); + SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: %pI6\n", + &saddr->v6.sin6_addr); return; } scope = sctp_scope(daddr); bp = &asoc->base.bind_addr; - addr_lock = &asoc->base.addr_lock; /* Go through the bind address list and find the best source address * that matches the scope of the destination address. */ - sctp_read_lock(addr_lock); - list_for_each(pos, &bp->address_list) { - laddr = list_entry(pos, struct sctp_sockaddr_entry, list); - if ((laddr->a.sa.sa_family == AF_INET6) && + rcu_read_lock(); + list_for_each_entry_rcu(laddr, &bp->address_list, list) { + if (!laddr->valid) + continue; + if ((laddr->state == SCTP_ADDR_SRC) && + (laddr->a.sa.sa_family == AF_INET6) && (scope <= sctp_scope(&laddr->a))) { bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); if (!baddr || (matchlen < bmatchlen)) { @@ -305,17 +346,14 @@ static void sctp_v6_get_saddr(struct sctp_association *asoc, if (baddr) { memcpy(saddr, baddr, sizeof(union sctp_addr)); - SCTP_DEBUG_PRINTK("saddr: " - "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", - NIP6(saddr->v6.sin6_addr)); + SCTP_DEBUG_PRINTK("saddr: %pI6\n", &saddr->v6.sin6_addr); } else { printk(KERN_ERR "%s: asoc:%p Could not find a valid source " - "address for the " - "dest:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", - __FUNCTION__, asoc, NIP6(daddr->v6.sin6_addr)); + "address for the dest:%pI6\n", + __func__, asoc, &daddr->v6.sin6_addr); } - sctp_read_unlock(addr_lock); + rcu_read_unlock(); } /* Make a copy of all potential local addresses. */ @@ -326,14 +364,14 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist, struct inet6_ifaddr *ifp; struct sctp_sockaddr_entry *addr; - read_lock(&addrconf_lock); + rcu_read_lock(); if ((in6_dev = __in6_dev_get(dev)) == NULL) { - read_unlock(&addrconf_lock); + rcu_read_unlock(); return; } - read_lock(&in6_dev->lock); - for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) { + read_lock_bh(&in6_dev->lock); + list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { /* Add the address to the local list. */ addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); if (addr) { @@ -341,13 +379,14 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist, addr->a.v6.sin6_port = 0; addr->a.v6.sin6_addr = ifp->addr; addr->a.v6.sin6_scope_id = dev->ifindex; + addr->valid = 1; INIT_LIST_HEAD(&addr->list); list_add_tail(&addr->list, addrlist); } } - read_unlock(&in6_dev->lock); - read_unlock(&addrconf_lock); + read_unlock_bh(&in6_dev->lock); + rcu_read_unlock(); } /* Initialize a sockaddr_storage from in incoming skb. */ @@ -355,7 +394,7 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, int is_saddr) { void *from; - __u16 *port; + __be16 *port; struct sctphdr *sh; port = &addr->v6.sin6_port; @@ -363,13 +402,13 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, addr->v6.sin6_flowinfo = 0; /* FIXME */ addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; - sh = (struct sctphdr *) skb->h.raw; + sh = sctp_hdr(skb); if (is_saddr) { - *port = ntohs(sh->source); - from = &skb->nh.ipv6h->saddr; + *port = sh->source; + from = &ipv6_hdr(skb)->saddr; } else { - *port = ntohs(sh->dest); - from = &skb->nh.ipv6h->daddr; + *port = sh->dest; + from = &ipv6_hdr(skb)->daddr; } ipv6_addr_copy(&addr->v6.sin6_addr, from); } @@ -378,7 +417,7 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) { addr->v6.sin6_family = AF_INET6; - addr->v6.sin6_port = inet_sk(sk)->num; + addr->v6.sin6_port = 0; addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr; } @@ -412,7 +451,7 @@ static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) /* Initialize a sctp_addr from an address parameter. */ static void sctp_v6_from_addr_param(union sctp_addr *addr, union sctp_addr_param *param, - __u16 port, int iif) + __be16 port, int iif) { addr->v6.sin6_family = AF_INET6; addr->v6.sin6_port = port; @@ -430,7 +469,7 @@ static int sctp_v6_to_addr_param(const union sctp_addr *addr, int length = sizeof(sctp_ipv6addr_param_t); param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; - param->v6.param_hdr.length = ntohs(length); + param->v6.param_hdr.length = htons(length); ipv6_addr_copy(¶m->v6.addr, &addr->v6.sin6_addr); return length; @@ -438,7 +477,7 @@ static int sctp_v6_to_addr_param(const union sctp_addr *addr, /* Initialize a sctp_addr from a dst_entry. */ static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst, - unsigned short port) + __be16 port) { struct rt6_info *rt = (struct rt6_info *)dst; addr->sa.sa_family = AF_INET6; @@ -455,7 +494,7 @@ static int sctp_v6_cmp_addr(const union sctp_addr *addr1, if (addr1->sa.sa_family != addr2->sa.sa_family) { if (addr1->sa.sa_family == AF_INET && addr2->sa.sa_family == AF_INET6 && - IPV6_ADDR_MAPPED == ipv6_addr_type(&addr2->v6.sin6_addr)) { + ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { if (addr2->v6.sin6_port == addr1->v4.sin_port && addr2->v6.sin6_addr.s6_addr32[3] == addr1->v4.sin_addr.s_addr) @@ -463,7 +502,7 @@ static int sctp_v6_cmp_addr(const union sctp_addr *addr1, } if (addr2->sa.sa_family == AF_INET && addr1->sa.sa_family == AF_INET6 && - IPV6_ADDR_MAPPED == ipv6_addr_type(&addr1->v6.sin6_addr)) { + ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { if (addr1->v6.sin6_port == addr2->v4.sin_port && addr1->v6.sin6_addr.s6_addr32[3] == addr2->v4.sin_addr.s_addr) @@ -485,7 +524,7 @@ static int sctp_v6_cmp_addr(const union sctp_addr *addr1, } /* Initialize addr struct to INADDR_ANY. */ -static void sctp_v6_inaddr_any(union sctp_addr *addr, unsigned short port) +static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) { memset(addr, 0x00, sizeof(union sctp_addr)); addr->v6.sin6_family = AF_INET6; @@ -518,7 +557,7 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) if (!(type & IPV6_ADDR_UNICAST)) return 0; - return ipv6_chk_addr(in6, NULL, 0); + return ipv6_chk_addr(&init_net, in6, NULL, 0); } /* This function checks if the address is a valid address to be used for @@ -528,7 +567,9 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) * Return 0 - If the address is a non-unicast or an illegal address. * Return 1 - If the address is a unicast. */ -static int sctp_v6_addr_valid(union sctp_addr *addr, struct sctp_sock *sp) +static int sctp_v6_addr_valid(union sctp_addr *addr, + struct sctp_sock *sp, + const struct sk_buff *skb) { int ret = ipv6_addr_type(&addr->v6.sin6_addr); @@ -542,7 +583,7 @@ static int sctp_v6_addr_valid(union sctp_addr *addr, struct sctp_sock *sp) if (sp && ipv6_only_sock(sctp_opt2sk(sp))) return 0; sctp_v6_map_v4(addr); - return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp); + return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); } /* Is this a non-unicast address */ @@ -576,7 +617,7 @@ static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) default: retval = SCTP_SCOPE_GLOBAL; break; - }; + } return retval; } @@ -585,35 +626,24 @@ static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) static struct sock *sctp_v6_create_accept_sk(struct sock *sk, struct sctp_association *asoc) { - struct inet_sock *inet = inet_sk(sk); struct sock *newsk; - struct inet_sock *newinet; struct ipv6_pinfo *newnp, *np = inet6_sk(sk); struct sctp6_sock *newsctp6sk; - newsk = sk_alloc(PF_INET6, GFP_KERNEL, sk->sk_prot, 1); + newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot); if (!newsk) goto out; sock_init_data(NULL, newsk); - newsk->sk_type = SOCK_STREAM; - - newsk->sk_prot = sk->sk_prot; - newsk->sk_no_check = sk->sk_no_check; - newsk->sk_reuse = sk->sk_reuse; - - newsk->sk_destruct = inet_sock_destruct; - newsk->sk_family = PF_INET6; - newsk->sk_protocol = IPPROTO_SCTP; - newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; - newsk->sk_shutdown = sk->sk_shutdown; + sctp_copy_sock(newsk, sk, asoc); sock_reset_flag(sk, SOCK_ZAPPED); newsctp6sk = (struct sctp6_sock *)newsk; inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; - newinet = inet_sk(newsk); + sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; + newnp = inet6_sk(newsk); memcpy(newnp, np, sizeof(struct ipv6_pinfo)); @@ -621,26 +651,8 @@ static struct sock *sctp_v6_create_accept_sk(struct sock *sk, /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() * and getpeername(). */ - newinet->sport = inet->sport; - newnp->saddr = np->saddr; - newnp->rcv_saddr = np->rcv_saddr; - newinet->dport = htons(asoc->peer.port); sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); - /* Init the ipv4 part of the socket since we can have sockets - * using v6 API for ipv4. - */ - newinet->uc_ttl = -1; - newinet->mc_loop = 1; - newinet->mc_ttl = 1; - newinet->mc_index = 0; - newinet->mc_list = NULL; - - if (ipv4_config.no_pmtu_disc) - newinet->pmtudisc = IP_PMTUDISC_DONT; - else - newinet->pmtudisc = IP_PMTUDISC_WANT; - sk_refcnt_debug_inc(newsk); if (newsk->sk_prot->init(newsk)) { @@ -669,14 +681,18 @@ static int sctp_v6_skb_iif(const struct sk_buff *skb) /* Was this packet marked by Explicit Congestion Notification? */ static int sctp_v6_is_ce(const struct sk_buff *skb) { - return *((__u32 *)(skb->nh.ipv6h)) & htonl(1<<20); + return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); } /* Dump the v6 addr to the seq file. */ static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) { - seq_printf(seq, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ", - NIP6(addr->v6.sin6_addr)); + seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr); +} + +static void sctp_v6_ecn_capable(struct sock *sk) +{ + inet6_sk(sk)->tclass |= INET_ECN_ECT_0; } /* Initialize a PF_INET6 socket msg_name. */ @@ -737,19 +753,19 @@ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, if (msgname) { sctp_inet6_msgname(msgname, addr_len); sin6 = (struct sockaddr_in6 *)msgname; - sh = (struct sctphdr *)skb->h.raw; + sh = sctp_hdr(skb); sin6->sin6_port = sh->source; /* Map ipv4 address into v4-mapped-on-v6 address. */ if (sctp_sk(skb->sk)->v4mapped && - skb->nh.iph->version == 4) { + ip_hdr(skb)->version == 4) { sctp_v4_map_v6((union sctp_addr *)sin6); - sin6->sin6_addr.s6_addr32[3] = skb->nh.iph->saddr; + sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; return; } /* Otherwise, just copy the v6 address. */ - ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); + ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { struct sctp_ulpevent *ev = sctp_skb2event(skb); sin6->sin6_scope_id = ev->iif; @@ -765,7 +781,7 @@ static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) return 1; /* v4-mapped-v6 addresses */ case AF_INET: - if (!__ipv6_only_sock(sctp_opt2sk(sp)) && sp->v4mapped) + if (!__ipv6_only_sock(sctp_opt2sk(sp))) return 1; default: return 0; @@ -781,14 +797,20 @@ static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, struct sctp_sock *opt) { struct sctp_af *af1, *af2; + struct sock *sk = sctp_opt2sk(opt); af1 = sctp_get_af_specific(addr1->sa.sa_family); af2 = sctp_get_af_specific(addr2->sa.sa_family); if (!af1 || !af2) return 0; + + /* If the socket is IPv6 only, v4 addrs will not match */ + if (__ipv6_only_sock(sk) && af1 != af2) + return 0; + /* Today, wildcard AF_INET/AF_INET6. */ - if (sctp_is_any(addr1) || sctp_is_any(addr2)) + if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) return 1; if (addr1->sa.sa_family != addr2->sa.sa_family) @@ -814,11 +836,21 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) if (type & IPV6_ADDR_LINKLOCAL) { if (!addr->v6.sin6_scope_id) return 0; - dev = dev_get_by_index(addr->v6.sin6_scope_id); - if (!dev) + rcu_read_lock(); + dev = dev_get_by_index_rcu(&init_net, + addr->v6.sin6_scope_id); + if (!dev || + !ipv6_chk_addr(&init_net, &addr->v6.sin6_addr, + dev, 0)) { + rcu_read_unlock(); + return 0; + } + rcu_read_unlock(); + } else if (type == IPV6_ADDR_MAPPED) { + if (!opt->v4mapped) return 0; - dev_put(dev); } + af = opt->pf->af; } return af->available(addr, opt); @@ -841,10 +873,12 @@ static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) if (type & IPV6_ADDR_LINKLOCAL) { if (!addr->v6.sin6_scope_id) return 0; - dev = dev_get_by_index(addr->v6.sin6_scope_id); + rcu_read_lock(); + dev = dev_get_by_index_rcu(&init_net, + addr->v6.sin6_scope_id); + rcu_read_unlock(); if (!dev) return 0; - dev_put(dev); } af = opt->pf->af; } @@ -859,31 +893,38 @@ static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) * Returns number of addresses supported. */ static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, - __u16 *types) -{ - types[0] = SCTP_PARAM_IPV4_ADDRESS; - types[1] = SCTP_PARAM_IPV6_ADDRESS; - return 2; -} - -static struct proto_ops inet6_seqpacket_ops = { - .family = PF_INET6, - .owner = THIS_MODULE, - .release = inet6_release, - .bind = inet6_bind, - .connect = inet_dgram_connect, - .socketpair = sock_no_socketpair, - .accept = inet_accept, - .getname = inet6_getname, - .poll = sctp_poll, - .ioctl = inet6_ioctl, - .listen = sctp_inet_listen, - .shutdown = inet_shutdown, - .setsockopt = sock_common_setsockopt, - .getsockopt = sock_common_getsockopt, - .sendmsg = inet_sendmsg, - .recvmsg = sock_common_recvmsg, - .mmap = sock_no_mmap, + __be16 *types) +{ + types[0] = SCTP_PARAM_IPV6_ADDRESS; + if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { + types[1] = SCTP_PARAM_IPV4_ADDRESS; + return 2; + } + return 1; +} + +static const struct proto_ops inet6_seqpacket_ops = { + .family = PF_INET6, + .owner = THIS_MODULE, + .release = inet6_release, + .bind = inet6_bind, + .connect = inet_dgram_connect, + .socketpair = sock_no_socketpair, + .accept = inet_accept, + .getname = inet6_getname, + .poll = sctp_poll, + .ioctl = inet6_ioctl, + .listen = sctp_inet_listen, + .shutdown = inet_shutdown, + .setsockopt = sock_common_setsockopt, + .getsockopt = sock_common_getsockopt, + .sendmsg = inet_sendmsg, + .recvmsg = sock_common_recvmsg, + .mmap = sock_no_mmap, +#ifdef CONFIG_COMPAT + .compat_setsockopt = compat_sock_common_setsockopt, + .compat_getsockopt = compat_sock_common_getsockopt, +#endif }; static struct inet_protosw sctpv6_seqpacket_protosw = { @@ -891,7 +932,6 @@ static struct inet_protosw sctpv6_seqpacket_protosw = { .protocol = IPPROTO_SCTP, .prot = &sctpv6_prot, .ops = &inet6_seqpacket_ops, - .capability = -1, .no_check = 0, .flags = SCTP_PROTOSW_FLAG }; @@ -900,51 +940,55 @@ static struct inet_protosw sctpv6_stream_protosw = { .protocol = IPPROTO_SCTP, .prot = &sctpv6_prot, .ops = &inet6_seqpacket_ops, - .capability = -1, .no_check = 0, .flags = SCTP_PROTOSW_FLAG, }; -static int sctp6_rcv(struct sk_buff **pskb, unsigned int *nhoffp) +static int sctp6_rcv(struct sk_buff *skb) { - return sctp_rcv(*pskb) ? -1 : 0; + return sctp_rcv(skb) ? -1 : 0; } -static struct inet6_protocol sctpv6_protocol = { +static const struct inet6_protocol sctpv6_protocol = { .handler = sctp6_rcv, .err_handler = sctp_v6_err, .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, }; -static struct sctp_af sctp_ipv6_specific = { - .sctp_xmit = sctp_v6_xmit, - .setsockopt = ipv6_setsockopt, - .getsockopt = ipv6_getsockopt, - .get_dst = sctp_v6_get_dst, - .get_saddr = sctp_v6_get_saddr, - .copy_addrlist = sctp_v6_copy_addrlist, - .from_skb = sctp_v6_from_skb, - .from_sk = sctp_v6_from_sk, - .to_sk_saddr = sctp_v6_to_sk_saddr, - .to_sk_daddr = sctp_v6_to_sk_daddr, - .from_addr_param = sctp_v6_from_addr_param, - .to_addr_param = sctp_v6_to_addr_param, - .dst_saddr = sctp_v6_dst_saddr, - .cmp_addr = sctp_v6_cmp_addr, - .scope = sctp_v6_scope, - .addr_valid = sctp_v6_addr_valid, - .inaddr_any = sctp_v6_inaddr_any, - .is_any = sctp_v6_is_any, - .available = sctp_v6_available, - .skb_iif = sctp_v6_skb_iif, - .is_ce = sctp_v6_is_ce, - .seq_dump_addr = sctp_v6_seq_dump_addr, - .net_header_len = sizeof(struct ipv6hdr), - .sockaddr_len = sizeof(struct sockaddr_in6), - .sa_family = AF_INET6, +static struct sctp_af sctp_af_inet6 = { + .sa_family = AF_INET6, + .sctp_xmit = sctp_v6_xmit, + .setsockopt = ipv6_setsockopt, + .getsockopt = ipv6_getsockopt, + .get_dst = sctp_v6_get_dst, + .get_saddr = sctp_v6_get_saddr, + .copy_addrlist = sctp_v6_copy_addrlist, + .from_skb = sctp_v6_from_skb, + .from_sk = sctp_v6_from_sk, + .to_sk_saddr = sctp_v6_to_sk_saddr, + .to_sk_daddr = sctp_v6_to_sk_daddr, + .from_addr_param = sctp_v6_from_addr_param, + .to_addr_param = sctp_v6_to_addr_param, + .dst_saddr = sctp_v6_dst_saddr, + .cmp_addr = sctp_v6_cmp_addr, + .scope = sctp_v6_scope, + .addr_valid = sctp_v6_addr_valid, + .inaddr_any = sctp_v6_inaddr_any, + .is_any = sctp_v6_is_any, + .available = sctp_v6_available, + .skb_iif = sctp_v6_skb_iif, + .is_ce = sctp_v6_is_ce, + .seq_dump_addr = sctp_v6_seq_dump_addr, + .ecn_capable = sctp_v6_ecn_capable, + .net_header_len = sizeof(struct ipv6hdr), + .sockaddr_len = sizeof(struct sockaddr_in6), +#ifdef CONFIG_COMPAT + .compat_setsockopt = compat_ipv6_setsockopt, + .compat_getsockopt = compat_ipv6_getsockopt, +#endif }; -static struct sctp_pf sctp_pf_inet6_specific = { +static struct sctp_pf sctp_pf_inet6 = { .event_msgname = sctp_inet6_event_msgname, .skb_msgname = sctp_inet6_skb_msgname, .af_supported = sctp_inet6_af_supported, @@ -954,48 +998,63 @@ static struct sctp_pf sctp_pf_inet6_specific = { .supported_addrs = sctp_inet6_supported_addrs, .create_accept_sk = sctp_v6_create_accept_sk, .addr_v4map = sctp_v6_addr_v4map, - .af = &sctp_ipv6_specific, + .af = &sctp_af_inet6, }; -/* Initialize IPv6 support and register with inet6 stack. */ -int sctp_v6_init(void) +/* Initialize IPv6 support and register with socket layer. */ +void sctp_v6_pf_init(void) { - int rc = proto_register(&sctpv6_prot, 1); + /* Register the SCTP specific PF_INET6 functions. */ + sctp_register_pf(&sctp_pf_inet6, PF_INET6); + + /* Register the SCTP specific AF_INET6 functions. */ + sctp_register_af(&sctp_af_inet6); +} +void sctp_v6_pf_exit(void) +{ + list_del(&sctp_af_inet6.list); +} + +/* Initialize IPv6 support and register with socket layer. */ +int sctp_v6_protosw_init(void) +{ + int rc; + + rc = proto_register(&sctpv6_prot, 1); if (rc) - goto out; - /* Register inet6 protocol. */ - rc = -EAGAIN; - if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) - goto out_unregister_sctp_proto; + return rc; /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ inet6_register_protosw(&sctpv6_seqpacket_protosw); inet6_register_protosw(&sctpv6_stream_protosw); - /* Register the SCTP specific PF_INET6 functions. */ - sctp_register_pf(&sctp_pf_inet6_specific, PF_INET6); + return 0; +} - /* Register the SCTP specific AF_INET6 functions. */ - sctp_register_af(&sctp_ipv6_specific); +void sctp_v6_protosw_exit(void) +{ + inet6_unregister_protosw(&sctpv6_seqpacket_protosw); + inet6_unregister_protosw(&sctpv6_stream_protosw); + proto_unregister(&sctpv6_prot); +} + +/* Register with inet6 layer. */ +int sctp_v6_add_protocol(void) +{ /* Register notifier for inet6 address additions/deletions. */ register_inet6addr_notifier(&sctp_inet6addr_notifier); - rc = 0; -out: - return rc; -out_unregister_sctp_proto: - proto_unregister(&sctpv6_prot); - goto out; + + if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) + return -EAGAIN; + + return 0; } -/* IPv6 specific exit support. */ -void sctp_v6_exit(void) +/* Unregister with inet6 layer. */ +void sctp_v6_del_protocol(void) { - list_del(&sctp_ipv6_specific.list); inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); - inet6_unregister_protosw(&sctpv6_seqpacket_protosw); - inet6_unregister_protosw(&sctpv6_stream_protosw); unregister_inet6addr_notifier(&sctp_inet6addr_notifier); - proto_unregister(&sctpv6_prot); }