-/* 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.
#include <asm/uaccess.h>
-/* Event handler for inet6 address addition/deletion events. */
+/* 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;
- struct list_head *pos, *temp;
+ struct sctp_sockaddr_entry *addr = NULL;
+ struct sctp_sockaddr_entry *temp;
+ int found = 0;
switch (ev) {
case NETDEV_UP:
memcpy(&addr->a.v6.sin6_addr, &ifa->addr,
sizeof(struct in6_addr));
addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex;
- list_add_tail(&addr->list, &sctp_local_addr_list);
+ 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:
- list_for_each_safe(pos, temp, &sctp_local_addr_list) {
- addr = list_entry(pos, struct sctp_sockaddr_entry, list);
- if (ipv6_addr_equal(&addr->a.v6.sin6_addr, &ifa->addr)) {
- list_del(pos);
- kfree(addr);
+ 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;
}
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;
}
}
/* 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);
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
}
- SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
- "src:" NIP6_FMT " dst:" NIP6_FMT "\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
fl.oif = daddr->v6.sin6_scope_id;
- SCTP_DEBUG_PRINTK("%s: DST=" NIP6_FMT " ",
- __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=" NIP6_FMT " - ",
- NIP6(fl.fl6_src));
+ SCTP_DEBUG_PRINTK("SRC=%pI6 - ", &fl.fl6_src);
}
- dst = ip6_route_output(NULL, &fl);
+ 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:" NIP6_FMT " rt6_src:" NIP6_FMT "\n",
- NIP6(rt->rt6i_dst.addr), NIP6(rt->rt6i_src.addr));
+ SCTP_DEBUG_PRINTK("rt6_dst:%pI6 rt6_src:%pI6\n",
+ &rt->rt6i_dst.addr, &rt->rt6i_src.addr);
return dst;
}
SCTP_DEBUG_PRINTK("NO ROUTE\n");
/* 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:" NIP6_FMT " ",
- __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: " NIP6_FMT "\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->use_as_src) &&
+ 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) {
memcpy(saddr, baddr, sizeof(union sctp_addr));
- SCTP_DEBUG_PRINTK("saddr: " NIP6_FMT "\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:" NIP6_FMT "\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. */
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);
+ INIT_RCU_HEAD(&addr->rcu);
list_add_tail(&addr->list, addrlist);
}
}
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)
}
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)
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
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;
newsctp6sk = (struct sctp6_sock *)newsk;
inet_sk(newsk)->pinet6 = &newsctp6sk->inet6;
+ sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped;
+
newinet = inet_sk(newsk);
newnp = inet6_sk(newsk);
/* 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, NIP6_FMT " ", 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. */
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;
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)
if (type & IPV6_ADDR_LINKLOCAL) {
if (!addr->v6.sin6_scope_id)
return 0;
- dev = dev_get_by_index(addr->v6.sin6_scope_id);
+ dev = dev_get_by_index(&init_net, addr->v6.sin6_scope_id);
if (!dev)
return 0;
+ if (!ipv6_chk_addr(&init_net, &addr->v6.sin6_addr,
+ dev, 0)) {
+ dev_put(dev);
+ return 0;
+ }
dev_put(dev);
+ } else if (type == IPV6_ADDR_MAPPED) {
+ if (!opt->v4mapped)
+ return 0;
}
+
af = opt->pf->af;
}
return af->available(addr, opt);
if (type & IPV6_ADDR_LINKLOCAL) {
if (!addr->v6.sin6_scope_id)
return 0;
- dev = dev_get_by_index(addr->v6.sin6_scope_id);
+ dev = dev_get_by_index(&init_net, addr->v6.sin6_scope_id);
if (!dev)
return 0;
dev_put(dev);
static int sctp_inet6_supported_addrs(const struct sctp_sock *opt,
__be16 *types)
{
- types[0] = SCTP_PARAM_IPV4_ADDRESS;
- types[1] = SCTP_PARAM_IPV6_ADDRESS;
- return 2;
+ 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 = {
.flags = SCTP_PROTOSW_FLAG,
};
-static int sctp6_rcv(struct sk_buff **pskb)
+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 = {
.flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,
};
-static struct sctp_af sctp_ipv6_specific = {
+static struct sctp_af sctp_af_inet6 = {
.sa_family = AF_INET6,
.sctp_xmit = sctp_v6_xmit,
.setsockopt = ipv6_setsockopt,
.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
#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,
.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 socket layer. */
-int sctp_v6_init(void)
+void sctp_v6_pf_init(void)
{
- int rc;
-
/* Register the SCTP specific PF_INET6 functions. */
- sctp_register_pf(&sctp_pf_inet6_specific, PF_INET6);
+ sctp_register_pf(&sctp_pf_inet6, PF_INET6);
/* Register the SCTP specific AF_INET6 functions. */
- sctp_register_af(&sctp_ipv6_specific);
+ 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)
return 0;
}
+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)
{
return 0;
}
-/* IPv6 specific exit support. */
-void sctp_v6_exit(void)
-{
- inet6_unregister_protosw(&sctpv6_seqpacket_protosw);
- inet6_unregister_protosw(&sctpv6_stream_protosw);
- proto_unregister(&sctpv6_prot);
- list_del(&sctp_ipv6_specific.list);
-}
-
/* Unregister with inet6 layer. */
void sctp_v6_del_protocol(void)
{