-/* SCTP kernel reference Implementation
+/* SCTP kernel implementation
* (C) Copyright IBM Corp. 2001, 2004
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001 Nokia, Inc.
* Copyright (c) 2001 La Monte H.P. Yarroll
*
- * This file is part of the SCTP kernel reference Implementation
+ * This file is part of the SCTP kernel implementation
*
* Initialization/cleanup for SCTP protocol support.
*
- * 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 <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/seq_file.h>
+#include <linux/bootmem.h>
+#include <net/net_namespace.h>
#include <net/protocol.h>
#include <net/ip.h>
#include <net/ipv6.h>
+#include <net/route.h>
#include <net/sctp/sctp.h>
#include <net/addrconf.h>
#include <net/inet_common.h>
#include <net/inet_ecn.h>
/* Global data structures. */
-struct sctp_globals sctp_globals;
+struct sctp_globals sctp_globals __read_mostly;
struct proc_dir_entry *proc_net_sctp;
DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly;
static struct sctp_af *sctp_af_v4_specific;
static struct sctp_af *sctp_af_v6_specific;
-kmem_cache_t *sctp_chunk_cachep __read_mostly;
-kmem_cache_t *sctp_bucket_cachep __read_mostly;
+struct kmem_cache *sctp_chunk_cachep __read_mostly;
+struct kmem_cache *sctp_bucket_cachep __read_mostly;
-extern int sctp_snmp_proc_init(void);
-extern int sctp_snmp_proc_exit(void);
-extern int sctp_eps_proc_init(void);
-extern int sctp_eps_proc_exit(void);
-extern int sctp_assocs_proc_init(void);
-extern int sctp_assocs_proc_exit(void);
+int sysctl_sctp_mem[3];
+int sysctl_sctp_rmem[3];
+int sysctl_sctp_wmem[3];
/* Return the address of the control sock. */
struct sock *sctp_get_ctl_sock(void)
{
if (!proc_net_sctp) {
struct proc_dir_entry *ent;
- ent = proc_mkdir("net/sctp", NULL);
+ ent = proc_mkdir("sctp", init_net.proc_net);
if (ent) {
ent->owner = THIS_MODULE;
proc_net_sctp = ent;
}
if (sctp_snmp_proc_init())
- goto out_nomem;
+ goto out_nomem;
if (sctp_eps_proc_init())
- goto out_nomem;
+ goto out_nomem;
if (sctp_assocs_proc_init())
- goto out_nomem;
+ goto out_nomem;
return 0;
return -ENOMEM;
}
-/* Clean up the proc fs entry for the SCTP protocol.
+/* Clean up the proc fs entry for the SCTP protocol.
* Note: Do not make this __exit as it is used in the init error
* path.
*/
if (proc_net_sctp) {
proc_net_sctp = NULL;
- remove_proc_entry("net/sctp", NULL);
+ remove_proc_entry("sctp", init_net.proc_net);
}
}
struct sctp_sockaddr_entry *addr;
rcu_read_lock();
- if ((in_dev = __in_dev_get(dev)) == NULL) {
+ if ((in_dev = __in_dev_get_rcu(dev)) == NULL) {
rcu_read_unlock();
return;
}
addr->a.v4.sin_family = AF_INET;
addr->a.v4.sin_port = 0;
addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
+ addr->valid = 1;
+ INIT_LIST_HEAD(&addr->list);
+ INIT_RCU_HEAD(&addr->rcu);
list_add_tail(&addr->list, addrlist);
}
}
/* Extract our IP addresses from the system and stash them in the
* protocol structure.
*/
-static void __sctp_get_local_addr_list(void)
+static void sctp_get_local_addr_list(void)
{
struct net_device *dev;
struct list_head *pos;
struct sctp_af *af;
read_lock(&dev_base_lock);
- for (dev = dev_base; dev; dev = dev->next) {
+ for_each_netdev(&init_net, dev) {
__list_for_each(pos, &sctp_address_families) {
af = list_entry(pos, struct sctp_af, list);
af->copy_addrlist(&sctp_local_addr_list, dev);
read_unlock(&dev_base_lock);
}
-static void sctp_get_local_addr_list(void)
-{
- unsigned long flags;
-
- sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
- __sctp_get_local_addr_list();
- sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
-}
-
/* Free the existing local addresses. */
-static void __sctp_free_local_addr_list(void)
+static void sctp_free_local_addr_list(void)
{
struct sctp_sockaddr_entry *addr;
struct list_head *pos, *temp;
}
}
-/* Free the existing local addresses. */
-static void sctp_free_local_addr_list(void)
+void sctp_local_addr_free(struct rcu_head *head)
{
- unsigned long flags;
-
- sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
- __sctp_free_local_addr_list();
- sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
+ struct sctp_sockaddr_entry *e = container_of(head,
+ struct sctp_sockaddr_entry, rcu);
+ kfree(e);
}
/* Copy the local addresses which are valid for 'scope' into 'bp'. */
int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope,
- unsigned int __nocast gfp, int copy_flags)
+ gfp_t gfp, int copy_flags)
{
struct sctp_sockaddr_entry *addr;
int error = 0;
- struct list_head *pos;
- unsigned long flags;
- sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
- list_for_each(pos, &sctp_local_addr_list) {
- addr = list_entry(pos, struct sctp_sockaddr_entry, list);
+ rcu_read_lock();
+ list_for_each_entry_rcu(addr, &sctp_local_addr_list, list) {
+ if (!addr->valid)
+ continue;
if (sctp_in_scope(&addr->a, scope)) {
/* Now that the address is in scope, check to see if
* the address type is really supported by the local
(((AF_INET6 == addr->a.sa.sa_family) &&
(copy_flags & SCTP_ADDR6_ALLOWED) &&
(copy_flags & SCTP_ADDR6_PEERSUPP)))) {
- error = sctp_add_bind_addr(bp, &addr->a,
- GFP_ATOMIC);
+ error = sctp_add_bind_addr(bp, &addr->a,
+ SCTP_ADDR_SRC, GFP_ATOMIC);
if (error)
goto end_copy;
}
}
end_copy:
- sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
+ rcu_read_unlock();
return error;
}
int is_saddr)
{
void *from;
- __u16 *port;
+ __be16 *port;
struct sctphdr *sh;
port = &addr->v4.sin_port;
addr->v4.sin_family = AF_INET;
- sh = (struct sctphdr *) skb->h.raw;
+ sh = sctp_hdr(skb);
if (is_saddr) {
- *port = ntohs(sh->source);
- from = &skb->nh.iph->saddr;
+ *port = sh->source;
+ from = &ip_hdr(skb)->saddr;
} else {
- *port = ntohs(sh->dest);
- from = &skb->nh.iph->daddr;
+ *port = sh->dest;
+ from = &ip_hdr(skb)->daddr;
}
memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr));
}
static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
{
addr->v4.sin_family = AF_INET;
- addr->v4.sin_port = inet_sk(sk)->num;
+ addr->v4.sin_port = 0;
addr->v4.sin_addr.s_addr = inet_sk(sk)->rcv_saddr;
}
/* Initialize a sctp_addr from an address parameter. */
static void sctp_v4_from_addr_param(union sctp_addr *addr,
union sctp_addr_param *param,
- __u16 port, int iif)
+ __be16 port, int iif)
{
addr->v4.sin_family = AF_INET;
addr->v4.sin_port = port;
int length = sizeof(sctp_ipv4addr_param_t);
param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
- param->v4.param_hdr.length = ntohs(length);
- param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
+ param->v4.param_hdr.length = htons(length);
+ param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
return length;
}
/* Initialize a sctp_addr from a dst_entry. */
static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst,
- unsigned short port)
+ __be16 port)
{
struct rtable *rt = (struct rtable *)dst;
saddr->v4.sin_family = AF_INET;
}
/* Initialize addr struct to INADDR_ANY. */
-static void sctp_v4_inaddr_any(union sctp_addr *addr, unsigned short port)
+static void sctp_v4_inaddr_any(union sctp_addr *addr, __be16 port)
{
addr->v4.sin_family = AF_INET;
- addr->v4.sin_addr.s_addr = INADDR_ANY;
+ addr->v4.sin_addr.s_addr = htonl(INADDR_ANY);
addr->v4.sin_port = port;
}
/* Is this a wildcard address? */
static int sctp_v4_is_any(const union sctp_addr *addr)
{
- return INADDR_ANY == addr->v4.sin_addr.s_addr;
+ return htonl(INADDR_ANY) == addr->v4.sin_addr.s_addr;
}
/* This function checks if the address is a valid address to be used for
* Return 0 - If the address is a non-unicast or an illegal address.
* Return 1 - If the address is a unicast.
*/
-static int sctp_v4_addr_valid(union sctp_addr *addr, struct sctp_sock *sp)
+static int sctp_v4_addr_valid(union sctp_addr *addr,
+ struct sctp_sock *sp,
+ const struct sk_buff *skb)
{
/* Is this a non-unicast address or a unusable SCTP address? */
- if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr))
+ if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr))
+ return 0;
+
+ /* Is this a broadcast address? */
+ if (skb && skb->rtable->rt_flags & RTCF_BROADCAST)
return 0;
return 1;
/* Should this be available for binding? */
static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
{
- int ret = inet_addr_type(addr->v4.sin_addr.s_addr);
+ int ret = inet_addr_type(&init_net, addr->v4.sin_addr.s_addr);
- if (addr->v4.sin_addr.s_addr != INADDR_ANY &&
+ if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) &&
ret != RTN_LOCAL &&
!sp->inet.freebind &&
!sysctl_ip_nonlocal_bind)
*/
/* Check for unusable SCTP addresses. */
- if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
+ if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) {
retval = SCTP_SCOPE_UNUSABLE;
- } else if (LOOPBACK(addr->v4.sin_addr.s_addr)) {
+ } else if (ipv4_is_loopback(addr->v4.sin_addr.s_addr)) {
retval = SCTP_SCOPE_LOOPBACK;
- } else if (IS_IPV4_LINK_ADDRESS(&addr->v4.sin_addr.s_addr)) {
+ } else if (ipv4_is_linklocal_169(addr->v4.sin_addr.s_addr)) {
retval = SCTP_SCOPE_LINK;
- } else if (IS_IPV4_PRIVATE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
+ } else if (ipv4_is_private_10(addr->v4.sin_addr.s_addr) ||
+ ipv4_is_private_172(addr->v4.sin_addr.s_addr) ||
+ ipv4_is_private_192(addr->v4.sin_addr.s_addr)) {
retval = SCTP_SCOPE_PRIVATE;
} else {
retval = SCTP_SCOPE_GLOBAL;
struct rtable *rt;
struct flowi fl;
struct sctp_bind_addr *bp;
- rwlock_t *addr_lock;
struct sctp_sockaddr_entry *laddr;
- struct list_head *pos;
struct dst_entry *dst = NULL;
union sctp_addr dst_saddr;
fl.fl4_src = saddr->v4.sin_addr.s_addr;
SCTP_DEBUG_PRINTK("%s: DST:%u.%u.%u.%u, SRC:%u.%u.%u.%u - ",
- __FUNCTION__, NIPQUAD(fl.fl4_dst),
+ __func__, NIPQUAD(fl.fl4_dst),
NIPQUAD(fl.fl4_src));
- if (!ip_route_output_key(&rt, &fl)) {
+ if (!ip_route_output_key(&init_net, &rt, &fl)) {
dst = &rt->u.dst;
}
goto out;
bp = &asoc->base.bind_addr;
- addr_lock = &asoc->base.addr_lock;
if (dst) {
/* Walk through the bind address list and look for a bind
* address that matches the source address of the returned dst.
*/
- sctp_read_lock(addr_lock);
- list_for_each(pos, &bp->address_list) {
- laddr = list_entry(pos, struct sctp_sockaddr_entry,
- list);
- sctp_v4_dst_saddr(&dst_saddr, dst, bp->port);
+ rcu_read_lock();
+ list_for_each_entry_rcu(laddr, &bp->address_list, list) {
+ if (!laddr->valid || (laddr->state != SCTP_ADDR_SRC))
+ continue;
+ sctp_v4_dst_saddr(&dst_saddr, dst, htons(bp->port));
if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
goto out_unlock;
}
- sctp_read_unlock(addr_lock);
+ rcu_read_unlock();
/* None of the bound addresses match the source address of the
* dst. So release it.
/* Walk through the bind address list and try to get a dst that
* matches a bind address as the source address.
*/
- sctp_read_lock(addr_lock);
- list_for_each(pos, &bp->address_list) {
- laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
-
- if (AF_INET == laddr->a.sa.sa_family) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(laddr, &bp->address_list, list) {
+ if (!laddr->valid)
+ continue;
+ if ((laddr->state == SCTP_ADDR_SRC) &&
+ (AF_INET == laddr->a.sa.sa_family)) {
fl.fl4_src = laddr->a.v4.sin_addr.s_addr;
- if (!ip_route_output_key(&rt, &fl)) {
+ if (!ip_route_output_key(&init_net, &rt, &fl)) {
dst = &rt->u.dst;
goto out_unlock;
}
}
out_unlock:
- sctp_read_unlock(addr_lock);
+ rcu_read_unlock();
out:
if (dst)
SCTP_DEBUG_PRINTK("rt_dst:%u.%u.%u.%u, rt_src:%u.%u.%u.%u\n",
- NIPQUAD(rt->rt_dst), NIPQUAD(rt->rt_src));
+ NIPQUAD(rt->rt_dst), NIPQUAD(rt->rt_src));
else
SCTP_DEBUG_PRINTK("NO ROUTE\n");
{
struct rtable *rt = (struct rtable *)dst;
+ if (!asoc)
+ return;
+
if (rt) {
saddr->v4.sin_family = AF_INET;
- saddr->v4.sin_port = asoc->base.bind_addr.port;
- saddr->v4.sin_addr.s_addr = rt->rt_src;
+ saddr->v4.sin_port = htons(asoc->base.bind_addr.port);
+ saddr->v4.sin_addr.s_addr = rt->rt_src;
}
}
/* What interface did this skb arrive on? */
static int sctp_v4_skb_iif(const struct sk_buff *skb)
{
- return ((struct rtable *)skb->dst)->rt_iif;
+ return skb->rtable->rt_iif;
}
/* Was this packet marked by Explicit Congestion Notification? */
static int sctp_v4_is_ce(const struct sk_buff *skb)
{
- return INET_ECN_is_ce(skb->nh.iph->tos);
+ return INET_ECN_is_ce(ip_hdr(skb)->tos);
}
/* Create and initialize a new sk for the socket returned by accept(). */
{
struct inet_sock *inet = inet_sk(sk);
struct inet_sock *newinet;
- struct sock *newsk = sk_alloc(PF_INET, GFP_KERNEL, sk->sk_prot, 1);
+ struct sock *newsk = sk_alloc(sk->sk_net, PF_INET, GFP_KERNEL,
+ sk->sk_prot);
if (!newsk)
goto out;
newinet->dport = htons(asoc->peer.port);
newinet->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
newinet->pmtudisc = inet->pmtudisc;
- newinet->id = 0;
+ newinet->id = asoc->next_tsn ^ jiffies;
newinet->uc_ttl = -1;
newinet->mc_loop = 1;
}
/* Event handler for inet address addition/deletion events.
- * Basically, whenever there is an event, we re-build our local address list.
+ * 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.
*/
-int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
- void *ptr)
+static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
+ void *ptr)
{
- unsigned long flags;
+ struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
+ struct sctp_sockaddr_entry *addr = NULL;
+ struct sctp_sockaddr_entry *temp;
+ int found = 0;
- sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
- __sctp_free_local_addr_list();
- __sctp_get_local_addr_list();
- sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
+ if (ifa->ifa_dev->dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
+ switch (ev) {
+ case NETDEV_UP:
+ addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC);
+ if (addr) {
+ addr->a.v4.sin_family = AF_INET;
+ addr->a.v4.sin_port = 0;
+ addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
+ 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.v4.sin_addr.s_addr == ifa->ifa_local) {
+ 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;
}
/* Initialize and copy out a msgname from an inbound skb. */
static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
{
- struct sctphdr *sh;
- struct sockaddr_in *sin;
-
if (msgname) {
+ struct sctphdr *sh = sctp_hdr(skb);
+ struct sockaddr_in *sin = (struct sockaddr_in *)msgname;
+
sctp_inet_msgname(msgname, len);
- sin = (struct sockaddr_in *)msgname;
- sh = (struct sctphdr *)skb->h.raw;
sin->sin_port = sh->source;
- sin->sin_addr.s_addr = skb->nh.iph->saddr;
+ sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
}
}
/* PF_INET only supports AF_INET addresses. */
if (addr1->sa.sa_family != addr2->sa.sa_family)
return 0;
- if (INADDR_ANY == addr1->v4.sin_addr.s_addr ||
- INADDR_ANY == addr2->v4.sin_addr.s_addr)
+ if (htonl(INADDR_ANY) == addr1->v4.sin_addr.s_addr ||
+ htonl(INADDR_ANY) == addr2->v4.sin_addr.s_addr)
return 1;
if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
return 1;
* chunks. Returns number of addresses supported.
*/
static int sctp_inet_supported_addrs(const struct sctp_sock *opt,
- __u16 *types)
+ __be16 *types)
{
types[0] = SCTP_PARAM_IPV4_ADDRESS;
return 1;
{
SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
"src:%u.%u.%u.%u, dst:%u.%u.%u.%u\n",
- __FUNCTION__, skb, skb->len,
- NIPQUAD(((struct rtable *)skb->dst)->rt_src),
- NIPQUAD(((struct rtable *)skb->dst)->rt_dst));
+ __func__, skb, skb->len,
+ NIPQUAD(skb->rtable->rt_src),
+ NIPQUAD(skb->rtable->rt_dst));
SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
return ip_queue_xmit(skb, ipfragok);
}
-static struct sctp_af sctp_ipv4_specific;
+static struct sctp_af sctp_af_inet;
static struct sctp_pf sctp_pf_inet = {
.event_msgname = sctp_inet_event_msgname,
.supported_addrs = sctp_inet_supported_addrs,
.create_accept_sk = sctp_v4_create_accept_sk,
.addr_v4map = sctp_v4_addr_v4map,
- .af = &sctp_ipv4_specific,
+ .af = &sctp_af_inet
};
/* Notifier for inetaddr addition/deletion events. */
};
/* Socket operations. */
-static struct proto_ops inet_seqpacket_ops = {
- .family = PF_INET,
- .owner = THIS_MODULE,
- .release = inet_release, /* Needs to be wrapped... */
- .bind = inet_bind,
- .connect = inet_dgram_connect,
- .socketpair = sock_no_socketpair,
- .accept = inet_accept,
- .getname = inet_getname, /* Semantics are different. */
- .poll = sctp_poll,
- .ioctl = inet_ioctl,
- .listen = sctp_inet_listen,
- .shutdown = inet_shutdown, /* Looks harmless. */
- .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem. */
- .getsockopt = sock_common_getsockopt,
- .sendmsg = inet_sendmsg,
- .recvmsg = sock_common_recvmsg,
- .mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
+static const struct proto_ops inet_seqpacket_ops = {
+ .family = PF_INET,
+ .owner = THIS_MODULE,
+ .release = inet_release, /* Needs to be wrapped... */
+ .bind = inet_bind,
+ .connect = inet_dgram_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = inet_accept,
+ .getname = inet_getname, /* Semantics are different. */
+ .poll = sctp_poll,
+ .ioctl = inet_ioctl,
+ .listen = sctp_inet_listen,
+ .shutdown = inet_shutdown, /* Looks harmless. */
+ .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem */
+ .getsockopt = sock_common_getsockopt,
+ .sendmsg = inet_sendmsg,
+ .recvmsg = sock_common_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_sock_common_setsockopt,
+ .compat_getsockopt = compat_sock_common_getsockopt,
+#endif
};
/* Registration with AF_INET family. */
};
/* IPv4 address related functions. */
-static struct sctp_af sctp_ipv4_specific = {
- .sctp_xmit = sctp_v4_xmit,
- .setsockopt = ip_setsockopt,
- .getsockopt = ip_getsockopt,
- .get_dst = sctp_v4_get_dst,
- .get_saddr = sctp_v4_get_saddr,
- .copy_addrlist = sctp_v4_copy_addrlist,
- .from_skb = sctp_v4_from_skb,
- .from_sk = sctp_v4_from_sk,
- .to_sk_saddr = sctp_v4_to_sk_saddr,
- .to_sk_daddr = sctp_v4_to_sk_daddr,
- .from_addr_param= sctp_v4_from_addr_param,
- .to_addr_param = sctp_v4_to_addr_param,
- .dst_saddr = sctp_v4_dst_saddr,
- .cmp_addr = sctp_v4_cmp_addr,
- .addr_valid = sctp_v4_addr_valid,
- .inaddr_any = sctp_v4_inaddr_any,
- .is_any = sctp_v4_is_any,
- .available = sctp_v4_available,
- .scope = sctp_v4_scope,
- .skb_iif = sctp_v4_skb_iif,
- .is_ce = sctp_v4_is_ce,
- .seq_dump_addr = sctp_v4_seq_dump_addr,
- .net_header_len = sizeof(struct iphdr),
- .sockaddr_len = sizeof(struct sockaddr_in),
- .sa_family = AF_INET,
+static struct sctp_af sctp_af_inet = {
+ .sa_family = AF_INET,
+ .sctp_xmit = sctp_v4_xmit,
+ .setsockopt = ip_setsockopt,
+ .getsockopt = ip_getsockopt,
+ .get_dst = sctp_v4_get_dst,
+ .get_saddr = sctp_v4_get_saddr,
+ .copy_addrlist = sctp_v4_copy_addrlist,
+ .from_skb = sctp_v4_from_skb,
+ .from_sk = sctp_v4_from_sk,
+ .to_sk_saddr = sctp_v4_to_sk_saddr,
+ .to_sk_daddr = sctp_v4_to_sk_daddr,
+ .from_addr_param = sctp_v4_from_addr_param,
+ .to_addr_param = sctp_v4_to_addr_param,
+ .dst_saddr = sctp_v4_dst_saddr,
+ .cmp_addr = sctp_v4_cmp_addr,
+ .addr_valid = sctp_v4_addr_valid,
+ .inaddr_any = sctp_v4_inaddr_any,
+ .is_any = sctp_v4_is_any,
+ .available = sctp_v4_available,
+ .scope = sctp_v4_scope,
+ .skb_iif = sctp_v4_skb_iif,
+ .is_ce = sctp_v4_is_ce,
+ .seq_dump_addr = sctp_v4_seq_dump_addr,
+ .net_header_len = sizeof(struct iphdr),
+ .sockaddr_len = sizeof(struct sockaddr_in),
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_ip_setsockopt,
+ .compat_getsockopt = compat_ip_getsockopt,
+#endif
};
struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
int i;
int status = -EINVAL;
unsigned long goal;
+ unsigned long limit;
+ int max_share;
int order;
/* SCTP_DEBUG sanity check. */
if (!sctp_sanity_check())
goto out;
- status = proto_register(&sctp_prot, 1);
- if (status)
- goto out;
-
- /* Add SCTP to inet_protos hash table. */
- status = -EAGAIN;
- if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
- goto err_add_protocol;
-
- /* Add SCTP(TCP and UDP style) to inetsw linked list. */
- inet_register_protosw(&sctp_seqpacket_protosw);
- inet_register_protosw(&sctp_stream_protosw);
-
- /* Allocate a cache pools. */
+ /* Allocate bind_bucket and chunk caches. */
status = -ENOBUFS;
sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket",
sizeof(struct sctp_bind_bucket),
0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
-
+ NULL);
if (!sctp_bucket_cachep)
- goto err_bucket_cachep;
+ goto out;
sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
sizeof(struct sctp_chunk),
0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
+ NULL);
if (!sctp_chunk_cachep)
goto err_chunk_cachep;
sctp_rto_beta = SCTP_RTO_BETA;
/* Valid.Cookie.Life - 60 seconds */
- sctp_valid_cookie_life = 60 * HZ;
+ sctp_valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE;
/* Whether Cookie Preservative is enabled(1) or not(0) */
sctp_cookie_preserve_enable = 1;
/* Max.Burst - 4 */
- sctp_max_burst = SCTP_MAX_BURST;
+ sctp_max_burst = SCTP_DEFAULT_MAX_BURST;
/* Association.Max.Retrans - 10 attempts
* Path.Max.Retrans - 5 attempts (per destination address)
/* Sendbuffer growth - do per-socket accounting */
sctp_sndbuf_policy = 0;
+ /* Rcvbuffer growth - do per-socket accounting */
+ sctp_rcvbuf_policy = 0;
+
/* HB.interval - 30 seconds */
sctp_hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT;
/* Initialize handle used for association ids. */
idr_init(&sctp_assocs_id);
+ /* Set the pressure threshold to be a fraction of global memory that
+ * is up to 1/2 at 256 MB, decreasing toward zero with the amount of
+ * memory, with a floor of 128 pages.
+ * Note this initalizes the data in sctpv6_prot too
+ * Unabashedly stolen from tcp_init
+ */
+ limit = min(num_physpages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT);
+ limit = (limit * (num_physpages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11);
+ limit = max(limit, 128UL);
+ sysctl_sctp_mem[0] = limit / 4 * 3;
+ sysctl_sctp_mem[1] = limit;
+ sysctl_sctp_mem[2] = sysctl_sctp_mem[0] * 2;
+
+ /* Set per-socket limits to no more than 1/128 the pressure threshold*/
+ limit = (sysctl_sctp_mem[1]) << (PAGE_SHIFT - 7);
+ max_share = min(4UL*1024*1024, limit);
+
+ sysctl_sctp_rmem[0] = PAGE_SIZE; /* give each asoc 1 page min */
+ sysctl_sctp_rmem[1] = (1500 *(sizeof(struct sk_buff) + 1));
+ sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share);
+
+ sysctl_sctp_wmem[0] = SK_MEM_QUANTUM;
+ sysctl_sctp_wmem[1] = 16*1024;
+ sysctl_sctp_wmem[2] = max(64*1024, max_share);
+
/* Size and allocate the association hash table.
* The methodology is similar to that of the tcp hash tables.
*/
}
for (i = 0; i < sctp_assoc_hashsize; i++) {
rwlock_init(&sctp_assoc_hashtable[i].lock);
- sctp_assoc_hashtable[i].chain = NULL;
+ INIT_HLIST_HEAD(&sctp_assoc_hashtable[i].chain);
}
/* Allocate and initialize the endpoint hash table. */
}
for (i = 0; i < sctp_ep_hashsize; i++) {
rwlock_init(&sctp_ep_hashtable[i].lock);
- sctp_ep_hashtable[i].chain = NULL;
+ INIT_HLIST_HEAD(&sctp_ep_hashtable[i].chain);
}
/* Allocate and initialize the SCTP port hash table. */
}
for (i = 0; i < sctp_port_hashsize; i++) {
spin_lock_init(&sctp_port_hashtable[i].lock);
- sctp_port_hashtable[i].chain = NULL;
+ INIT_HLIST_HEAD(&sctp_port_hashtable[i].chain);
}
- spin_lock_init(&sctp_port_alloc_lock);
- sctp_port_rover = sysctl_local_port_range[0] - 1;
-
printk(KERN_INFO "SCTP: Hash tables configured "
"(established %d bind %d)\n",
sctp_assoc_hashsize, sctp_port_hashsize);
/* Disable ADDIP by default. */
sctp_addip_enable = 0;
+ sctp_addip_noauth = 0;
/* Enable PR-SCTP by default. */
sctp_prsctp_enable = 1;
+ /* Disable AUTH by default. */
+ sctp_auth_enable = 0;
+
sctp_sysctl_register();
INIT_LIST_HEAD(&sctp_address_families);
- sctp_register_af(&sctp_ipv4_specific);
+ sctp_register_af(&sctp_af_inet);
+
+ status = proto_register(&sctp_prot, 1);
+ if (status)
+ goto err_proto_register;
+
+ /* Register SCTP(UDP and TCP style) with socket layer. */
+ inet_register_protosw(&sctp_seqpacket_protosw);
+ inet_register_protosw(&sctp_stream_protosw);
status = sctp_v6_init();
if (status)
/* Initialize the local address list. */
INIT_LIST_HEAD(&sctp_local_addr_list);
spin_lock_init(&sctp_local_addr_lock);
+ sctp_get_local_addr_list();
/* Register notifier for inet address additions/deletions. */
register_inetaddr_notifier(&sctp_inetaddr_notifier);
- sctp_get_local_addr_list();
+ /* Register SCTP with inet layer. */
+ if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0) {
+ status = -EAGAIN;
+ goto err_add_protocol;
+ }
+
+ /* Register SCTP with inet6 layer. */
+ status = sctp_v6_add_protocol();
+ if (status)
+ goto err_v6_add_protocol;
- __unsafe(THIS_MODULE);
status = 0;
out:
return status;
+err_v6_add_protocol:
+ inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
+ unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
+err_add_protocol:
+ sctp_free_local_addr_list();
+ sock_release(sctp_ctl_socket);
err_ctl_sock_init:
sctp_v6_exit();
err_v6_init:
+ inet_unregister_protosw(&sctp_stream_protosw);
+ inet_unregister_protosw(&sctp_seqpacket_protosw);
+ proto_unregister(&sctp_prot);
+err_proto_register:
sctp_sysctl_unregister();
- list_del(&sctp_ipv4_specific.list);
+ list_del(&sctp_af_inet.list);
free_pages((unsigned long)sctp_port_hashtable,
get_order(sctp_port_hashsize *
sizeof(struct sctp_bind_hashbucket)));
sizeof(struct sctp_hashbucket)));
err_ahash_alloc:
sctp_dbg_objcnt_exit();
-err_init_proc:
sctp_proc_exit();
+err_init_proc:
cleanup_sctp_mibs();
err_init_mibs:
kmem_cache_destroy(sctp_chunk_cachep);
err_chunk_cachep:
kmem_cache_destroy(sctp_bucket_cachep);
-err_bucket_cachep:
- inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
- inet_unregister_protosw(&sctp_seqpacket_protosw);
- inet_unregister_protosw(&sctp_stream_protosw);
-err_add_protocol:
- proto_unregister(&sctp_prot);
goto out;
}
* up all the remaining associations and all that memory.
*/
+ /* Unregister with inet6/inet layers. */
+ sctp_v6_del_protocol();
+ inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
+
/* Unregister notifier for inet address additions/deletions. */
unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
/* Free the control endpoint. */
sock_release(sctp_ctl_socket);
+ /* Cleanup v6 initializations. */
sctp_v6_exit();
+
+ /* Unregister with socket layer. */
+ inet_unregister_protosw(&sctp_stream_protosw);
+ inet_unregister_protosw(&sctp_seqpacket_protosw);
+
sctp_sysctl_unregister();
- list_del(&sctp_ipv4_specific.list);
+ list_del(&sctp_af_inet.list);
free_pages((unsigned long)sctp_assoc_hashtable,
get_order(sctp_assoc_hashsize *
get_order(sctp_port_hashsize *
sizeof(struct sctp_bind_hashbucket)));
- kmem_cache_destroy(sctp_chunk_cachep);
- kmem_cache_destroy(sctp_bucket_cachep);
-
sctp_dbg_objcnt_exit();
sctp_proc_exit();
cleanup_sctp_mibs();
- inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
- inet_unregister_protosw(&sctp_seqpacket_protosw);
- inet_unregister_protosw(&sctp_stream_protosw);
+ kmem_cache_destroy(sctp_chunk_cachep);
+ kmem_cache_destroy(sctp_bucket_cachep);
+
proto_unregister(&sctp_prot);
}
* __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly.
*/
MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
+MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132");
MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
MODULE_LICENSE("GPL");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff