-/* 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;
}
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;
+ 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);
goto out;
SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
"src:" NIP6_FMT " dst:" NIP6_FMT "\n",
- __FUNCTION__, skb, skb->len,
+ __func__, skb, skb->len,
NIP6(fl.fl6_src), NIP6(fl.fl6_dst));
SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
SCTP_DEBUG_PRINTK("%s: DST=" NIP6_FMT " ",
- __FUNCTION__, NIP6(fl.fl6_dst));
+ __func__, NIP6(fl.fl6_dst));
if (saddr) {
ipv6_addr_copy(&fl.fl6_src, &saddr->v6.sin6_addr);
NIP6(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;
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;
SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p "
"daddr:" NIP6_FMT " ",
- __FUNCTION__, asoc, dst, NIP6(daddr->v6.sin6_addr));
+ __func__, asoc, dst, NIP6(daddr->v6.sin6_addr));
if (!asoc) {
- ipv6_get_saddr(dst, &daddr->v6.sin6_addr,&saddr->v6.sin6_addr);
+ ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL,
+ &daddr->v6.sin6_addr,
+ inet6_sk(asoc->base.sk)->srcprefs,
+ &saddr->v6.sin6_addr);
SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: " NIP6_FMT "\n",
NIP6(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);
} 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));
+ __func__, asoc, NIP6(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
default:
retval = SCTP_SCOPE_GLOBAL;
break;
- };
+ }
return retval;
}
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);
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);
}
af = opt->pf->af;
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);
.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,
#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 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;
+}
+
+void sctp_v6_protosw_exit(void)
+{
+ inet6_unregister_protosw(&sctpv6_seqpacket_protosw);
+ inet6_unregister_protosw(&sctpv6_stream_protosw);
+ proto_unregister(&sctpv6_prot);
+}
- /* Register the SCTP specific AF_INET6 functions. */
- sctp_register_af(&sctp_ipv6_specific);
+/* 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);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff