/* SCTP kernel reference Implementation
|
/* SCTP kernel reference Implementation
|
* (C) Copyright IBM Corp. 2001, 2004
|
* (C) Copyright IBM Corp. 2001, 2004
|
* Copyright (c) 1999-2000 Cisco, Inc.
|
* Copyright (c) 1999-2000 Cisco, Inc.
|
* Copyright (c) 1999-2001 Motorola, Inc.
|
* Copyright (c) 1999-2001 Motorola, Inc.
|
* Copyright (c) 2001 Intel Corp.
|
* Copyright (c) 2001 Intel Corp.
|
* Copyright (c) 2001 Nokia, Inc.
|
* Copyright (c) 2001 Nokia, Inc.
|
* Copyright (c) 2001 La Monte H.P. Yarroll
|
* 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 reference Implementation
|
*
|
*
|
* Initialization/cleanup for SCTP protocol support.
|
* Initialization/cleanup for SCTP protocol support.
|
*
|
*
|
* The SCTP reference implementation is free software;
|
* The SCTP reference implementation is free software;
|
* you can redistribute it and/or modify it under the terms of
|
* you can redistribute it and/or modify it under the terms of
|
* the GNU General Public License as published by
|
* the GNU General Public License as published by
|
* the Free Software Foundation; either version 2, or (at your option)
|
* the Free Software Foundation; either version 2, or (at your option)
|
* any later version.
|
* any later version.
|
*
|
*
|
* The SCTP reference implementation is distributed in the hope that it
|
* The SCTP reference implementation is distributed in the hope that it
|
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
|
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
|
* ************************
|
* ************************
|
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
* See the GNU General Public License for more details.
|
* See the GNU General Public License for more details.
|
*
|
*
|
* You should have received a copy of the GNU General Public License
|
* You should have received a copy of the GNU General Public License
|
* along with GNU CC; see the file COPYING. If not, write to
|
* along with GNU CC; see the file COPYING. If not, write to
|
* the Free Software Foundation, 59 Temple Place - Suite 330,
|
* the Free Software Foundation, 59 Temple Place - Suite 330,
|
* Boston, MA 02111-1307, USA.
|
* Boston, MA 02111-1307, USA.
|
*
|
*
|
* Please send any bug reports or fixes you make to the
|
* Please send any bug reports or fixes you make to the
|
* email address(es):
|
* email address(es):
|
* lksctp developers <lksctp-developers@lists.sourceforge.net>
|
* lksctp developers <lksctp-developers@lists.sourceforge.net>
|
*
|
*
|
* Or submit a bug report through the following website:
|
* Or submit a bug report through the following website:
|
* http://www.sf.net/projects/lksctp
|
* http://www.sf.net/projects/lksctp
|
*
|
*
|
* Written or modified by:
|
* Written or modified by:
|
* La Monte H.P. Yarroll <piggy@acm.org>
|
* La Monte H.P. Yarroll <piggy@acm.org>
|
* Karl Knutson <karl@athena.chicago.il.us>
|
* Karl Knutson <karl@athena.chicago.il.us>
|
* Jon Grimm <jgrimm@us.ibm.com>
|
* Jon Grimm <jgrimm@us.ibm.com>
|
* Sridhar Samudrala <sri@us.ibm.com>
|
* Sridhar Samudrala <sri@us.ibm.com>
|
* Daisy Chang <daisyc@us.ibm.com>
|
* Daisy Chang <daisyc@us.ibm.com>
|
* Ardelle Fan <ardelle.fan@intel.com>
|
* Ardelle Fan <ardelle.fan@intel.com>
|
*
|
*
|
* Any bugs reported given to us we will try to fix... any fixes shared will
|
* Any bugs reported given to us we will try to fix... any fixes shared will
|
* be incorporated into the next SCTP release.
|
* be incorporated into the next SCTP release.
|
*/
|
*/
|
|
|
#include <linux/module.h>
|
#include <linux/module.h>
|
#include <linux/init.h>
|
#include <linux/init.h>
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/inetdevice.h>
|
#include <linux/inetdevice.h>
|
#include <linux/seq_file.h>
|
#include <linux/seq_file.h>
|
#include <net/protocol.h>
|
#include <net/protocol.h>
|
#include <net/ip.h>
|
#include <net/ip.h>
|
#include <net/ipv6.h>
|
#include <net/ipv6.h>
|
#include <net/sctp/sctp.h>
|
#include <net/sctp/sctp.h>
|
#include <net/addrconf.h>
|
#include <net/addrconf.h>
|
#include <net/inet_common.h>
|
#include <net/inet_common.h>
|
#include <net/inet_ecn.h>
|
#include <net/inet_ecn.h>
|
|
|
/* Global data structures. */
|
/* Global data structures. */
|
struct sctp_globals sctp_globals;
|
struct sctp_globals sctp_globals;
|
struct proc_dir_entry *proc_net_sctp;
|
struct proc_dir_entry *proc_net_sctp;
|
DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
|
DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
|
|
|
/* This is the global socket data structure used for responding to
|
/* This is the global socket data structure used for responding to
|
* the Out-of-the-blue (OOTB) packets. A control sock will be created
|
* the Out-of-the-blue (OOTB) packets. A control sock will be created
|
* for this socket at the initialization time.
|
* for this socket at the initialization time.
|
*/
|
*/
|
static struct socket *sctp_ctl_socket;
|
static struct socket *sctp_ctl_socket;
|
|
|
static struct sctp_pf *sctp_pf_inet6_specific;
|
static struct sctp_pf *sctp_pf_inet6_specific;
|
static struct sctp_pf *sctp_pf_inet_specific;
|
static struct sctp_pf *sctp_pf_inet_specific;
|
static struct sctp_af *sctp_af_v4_specific;
|
static struct sctp_af *sctp_af_v4_specific;
|
static struct sctp_af *sctp_af_v6_specific;
|
static struct sctp_af *sctp_af_v6_specific;
|
|
|
kmem_cache_t *sctp_chunk_cachep;
|
kmem_cache_t *sctp_chunk_cachep;
|
|
|
extern struct net_proto_family inet_family_ops;
|
extern struct net_proto_family inet_family_ops;
|
|
|
extern int sctp_snmp_proc_init(void);
|
extern int sctp_snmp_proc_init(void);
|
extern int sctp_snmp_proc_exit(void);
|
extern int sctp_snmp_proc_exit(void);
|
extern int sctp_eps_proc_init(void);
|
extern int sctp_eps_proc_init(void);
|
extern int sctp_eps_proc_exit(void);
|
extern int sctp_eps_proc_exit(void);
|
extern int sctp_assocs_proc_init(void);
|
extern int sctp_assocs_proc_init(void);
|
extern int sctp_assocs_proc_exit(void);
|
extern int sctp_assocs_proc_exit(void);
|
|
|
/* Return the address of the control sock. */
|
/* Return the address of the control sock. */
|
struct sock *sctp_get_ctl_sock(void)
|
struct sock *sctp_get_ctl_sock(void)
|
{
|
{
|
return sctp_ctl_socket->sk;
|
return sctp_ctl_socket->sk;
|
}
|
}
|
|
|
/* Set up the proc fs entry for the SCTP protocol. */
|
/* Set up the proc fs entry for the SCTP protocol. */
|
__init int sctp_proc_init(void)
|
__init int sctp_proc_init(void)
|
{
|
{
|
if (!proc_net_sctp) {
|
if (!proc_net_sctp) {
|
struct proc_dir_entry *ent;
|
struct proc_dir_entry *ent;
|
ent = proc_mkdir("net/sctp", 0);
|
ent = proc_mkdir("net/sctp", 0);
|
if (ent) {
|
if (ent) {
|
ent->owner = THIS_MODULE;
|
ent->owner = THIS_MODULE;
|
proc_net_sctp = ent;
|
proc_net_sctp = ent;
|
} else
|
} else
|
goto out_nomem;
|
goto out_nomem;
|
}
|
}
|
|
|
if (sctp_snmp_proc_init())
|
if (sctp_snmp_proc_init())
|
goto out_nomem;
|
goto out_nomem;
|
if (sctp_eps_proc_init())
|
if (sctp_eps_proc_init())
|
goto out_nomem;
|
goto out_nomem;
|
if (sctp_assocs_proc_init())
|
if (sctp_assocs_proc_init())
|
goto out_nomem;
|
goto out_nomem;
|
|
|
return 0;
|
return 0;
|
|
|
out_nomem:
|
out_nomem:
|
return -ENOMEM;
|
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
|
* Note: Do not make this __exit as it is used in the init error
|
* path.
|
* path.
|
*/
|
*/
|
void sctp_proc_exit(void)
|
void sctp_proc_exit(void)
|
{
|
{
|
sctp_snmp_proc_exit();
|
sctp_snmp_proc_exit();
|
sctp_eps_proc_exit();
|
sctp_eps_proc_exit();
|
sctp_assocs_proc_exit();
|
sctp_assocs_proc_exit();
|
|
|
if (proc_net_sctp) {
|
if (proc_net_sctp) {
|
proc_net_sctp = NULL;
|
proc_net_sctp = NULL;
|
remove_proc_entry("net/sctp", 0);
|
remove_proc_entry("net/sctp", 0);
|
}
|
}
|
}
|
}
|
|
|
/* Private helper to extract ipv4 address and stash them in
|
/* Private helper to extract ipv4 address and stash them in
|
* the protocol structure.
|
* the protocol structure.
|
*/
|
*/
|
static void sctp_v4_copy_addrlist(struct list_head *addrlist,
|
static void sctp_v4_copy_addrlist(struct list_head *addrlist,
|
struct net_device *dev)
|
struct net_device *dev)
|
{
|
{
|
struct in_device *in_dev;
|
struct in_device *in_dev;
|
struct in_ifaddr *ifa;
|
struct in_ifaddr *ifa;
|
struct sctp_sockaddr_entry *addr;
|
struct sctp_sockaddr_entry *addr;
|
|
|
read_lock(&inetdev_lock);
|
read_lock(&inetdev_lock);
|
if ((in_dev = __in_dev_get(dev)) == NULL) {
|
if ((in_dev = __in_dev_get(dev)) == NULL) {
|
read_unlock(&inetdev_lock);
|
read_unlock(&inetdev_lock);
|
return;
|
return;
|
}
|
}
|
|
|
read_lock(&in_dev->lock);
|
read_lock(&in_dev->lock);
|
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
|
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
|
/* Add the address to the local list. */
|
/* Add the address to the local list. */
|
addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
|
addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
|
if (addr) {
|
if (addr) {
|
addr->a.v4.sin_family = AF_INET;
|
addr->a.v4.sin_family = AF_INET;
|
addr->a.v4.sin_port = 0;
|
addr->a.v4.sin_port = 0;
|
addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
|
addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
|
list_add_tail(&addr->list, addrlist);
|
list_add_tail(&addr->list, addrlist);
|
}
|
}
|
}
|
}
|
|
|
read_unlock(&in_dev->lock);
|
read_unlock(&in_dev->lock);
|
read_unlock(&inetdev_lock);
|
read_unlock(&inetdev_lock);
|
}
|
}
|
|
|
/* Extract our IP addresses from the system and stash them in the
|
/* Extract our IP addresses from the system and stash them in the
|
* protocol structure.
|
* protocol structure.
|
*/
|
*/
|
static void __sctp_get_local_addr_list(void)
|
static void __sctp_get_local_addr_list(void)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
struct list_head *pos;
|
struct list_head *pos;
|
struct sctp_af *af;
|
struct sctp_af *af;
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
for (dev = dev_base; dev; dev = dev->next) {
|
for (dev = dev_base; dev; dev = dev->next) {
|
list_for_each(pos, &sctp_address_families) {
|
list_for_each(pos, &sctp_address_families) {
|
af = list_entry(pos, struct sctp_af, list);
|
af = list_entry(pos, struct sctp_af, list);
|
af->copy_addrlist(&sctp_local_addr_list, dev);
|
af->copy_addrlist(&sctp_local_addr_list, dev);
|
}
|
}
|
}
|
}
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
}
|
}
|
|
|
static void sctp_get_local_addr_list(void)
|
static void sctp_get_local_addr_list(void)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
|
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
__sctp_get_local_addr_list();
|
__sctp_get_local_addr_list();
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
}
|
}
|
|
|
/* Free the existing local addresses. */
|
/* 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 sctp_sockaddr_entry *addr;
|
struct list_head *pos, *temp;
|
struct list_head *pos, *temp;
|
|
|
list_for_each_safe(pos, temp, &sctp_local_addr_list) {
|
list_for_each_safe(pos, temp, &sctp_local_addr_list) {
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
list_del(pos);
|
list_del(pos);
|
kfree(addr);
|
kfree(addr);
|
}
|
}
|
}
|
}
|
|
|
/* Free the existing local addresses. */
|
/* Free the existing local addresses. */
|
static void sctp_free_local_addr_list(void)
|
static void sctp_free_local_addr_list(void)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
|
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
__sctp_free_local_addr_list();
|
__sctp_free_local_addr_list();
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
}
|
}
|
|
|
/* Copy the local addresses which are valid for 'scope' into 'bp'. */
|
/* 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,
|
int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope,
|
int gfp, int copy_flags)
|
int gfp, int copy_flags)
|
{
|
{
|
struct sctp_sockaddr_entry *addr;
|
struct sctp_sockaddr_entry *addr;
|
int error = 0;
|
int error = 0;
|
struct list_head *pos;
|
struct list_head *pos;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
list_for_each(pos, &sctp_local_addr_list) {
|
list_for_each(pos, &sctp_local_addr_list) {
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
if (sctp_in_scope(&addr->a, scope)) {
|
if (sctp_in_scope(&addr->a, scope)) {
|
/* Now that the address is in scope, check to see if
|
/* Now that the address is in scope, check to see if
|
* the address type is really supported by the local
|
* the address type is really supported by the local
|
* sock as well as the remote peer.
|
* sock as well as the remote peer.
|
*/
|
*/
|
if ((((AF_INET == addr->a.sa.sa_family) &&
|
if ((((AF_INET == addr->a.sa.sa_family) &&
|
(copy_flags & SCTP_ADDR4_PEERSUPP))) ||
|
(copy_flags & SCTP_ADDR4_PEERSUPP))) ||
|
(((AF_INET6 == addr->a.sa.sa_family) &&
|
(((AF_INET6 == addr->a.sa.sa_family) &&
|
(copy_flags & SCTP_ADDR6_ALLOWED) &&
|
(copy_flags & SCTP_ADDR6_ALLOWED) &&
|
(copy_flags & SCTP_ADDR6_PEERSUPP)))) {
|
(copy_flags & SCTP_ADDR6_PEERSUPP)))) {
|
error = sctp_add_bind_addr(bp, &addr->a,
|
error = sctp_add_bind_addr(bp, &addr->a,
|
GFP_ATOMIC);
|
GFP_ATOMIC);
|
if (error)
|
if (error)
|
goto end_copy;
|
goto end_copy;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
end_copy:
|
end_copy:
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
return error;
|
return error;
|
}
|
}
|
|
|
/* Initialize a sctp_addr from in incoming skb. */
|
/* Initialize a sctp_addr from in incoming skb. */
|
static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
|
static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
|
int is_saddr)
|
int is_saddr)
|
{
|
{
|
void *from;
|
void *from;
|
__u16 *port;
|
__u16 *port;
|
struct sctphdr *sh;
|
struct sctphdr *sh;
|
|
|
port = &addr->v4.sin_port;
|
port = &addr->v4.sin_port;
|
addr->v4.sin_family = AF_INET;
|
addr->v4.sin_family = AF_INET;
|
|
|
sh = (struct sctphdr *) skb->h.raw;
|
sh = (struct sctphdr *) skb->h.raw;
|
if (is_saddr) {
|
if (is_saddr) {
|
*port = ntohs(sh->source);
|
*port = ntohs(sh->source);
|
from = &skb->nh.iph->saddr;
|
from = &skb->nh.iph->saddr;
|
} else {
|
} else {
|
*port = ntohs(sh->dest);
|
*port = ntohs(sh->dest);
|
from = &skb->nh.iph->daddr;
|
from = &skb->nh.iph->daddr;
|
}
|
}
|
memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr));
|
memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr));
|
}
|
}
|
|
|
/* Initialize an sctp_addr from a socket. */
|
/* Initialize an sctp_addr from a socket. */
|
static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
|
static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
|
{
|
{
|
addr->v4.sin_family = AF_INET;
|
addr->v4.sin_family = AF_INET;
|
addr->v4.sin_port = sk->num;
|
addr->v4.sin_port = sk->num;
|
addr->v4.sin_addr.s_addr = sk->rcv_saddr;
|
addr->v4.sin_addr.s_addr = sk->rcv_saddr;
|
}
|
}
|
|
|
/* Initialize sk->sk_rcv_saddr from sctp_addr. */
|
/* Initialize sk->sk_rcv_saddr from sctp_addr. */
|
static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
|
static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
|
{
|
{
|
sk->rcv_saddr = addr->v4.sin_addr.s_addr;
|
sk->rcv_saddr = addr->v4.sin_addr.s_addr;
|
}
|
}
|
|
|
/* Initialize sk->sk_daddr from sctp_addr. */
|
/* Initialize sk->sk_daddr from sctp_addr. */
|
static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
|
static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
|
{
|
{
|
sk->daddr = addr->v4.sin_addr.s_addr;
|
sk->daddr = addr->v4.sin_addr.s_addr;
|
}
|
}
|
|
|
/* Initialize a sctp_addr from an address parameter. */
|
/* Initialize a sctp_addr from an address parameter. */
|
static void sctp_v4_from_addr_param(union sctp_addr *addr,
|
static void sctp_v4_from_addr_param(union sctp_addr *addr,
|
union sctp_addr_param *param,
|
union sctp_addr_param *param,
|
__u16 port, int iif)
|
__u16 port, int iif)
|
{
|
{
|
addr->v4.sin_family = AF_INET;
|
addr->v4.sin_family = AF_INET;
|
addr->v4.sin_port = port;
|
addr->v4.sin_port = port;
|
addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
|
addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
|
}
|
}
|
|
|
/* Initialize an address parameter from a sctp_addr and return the length
|
/* Initialize an address parameter from a sctp_addr and return the length
|
* of the address parameter.
|
* of the address parameter.
|
*/
|
*/
|
static int sctp_v4_to_addr_param(const union sctp_addr *addr,
|
static int sctp_v4_to_addr_param(const union sctp_addr *addr,
|
union sctp_addr_param *param)
|
union sctp_addr_param *param)
|
{
|
{
|
int length = sizeof(sctp_ipv4addr_param_t);
|
int length = sizeof(sctp_ipv4addr_param_t);
|
|
|
param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
|
param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
|
param->v4.param_hdr.length = ntohs(length);
|
param->v4.param_hdr.length = ntohs(length);
|
param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
|
param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
|
|
|
return length;
|
return length;
|
}
|
}
|
|
|
/* Initialize a sctp_addr from a dst_entry. */
|
/* Initialize a sctp_addr from a dst_entry. */
|
static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst,
|
static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst,
|
unsigned short port)
|
unsigned short port)
|
{
|
{
|
struct rtable *rt = (struct rtable *)dst;
|
struct rtable *rt = (struct rtable *)dst;
|
saddr->v4.sin_family = AF_INET;
|
saddr->v4.sin_family = AF_INET;
|
saddr->v4.sin_port = port;
|
saddr->v4.sin_port = port;
|
saddr->v4.sin_addr.s_addr = rt->rt_src;
|
saddr->v4.sin_addr.s_addr = rt->rt_src;
|
}
|
}
|
|
|
/* Compare two addresses exactly. */
|
/* Compare two addresses exactly. */
|
static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
|
static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
|
const union sctp_addr *addr2)
|
const union sctp_addr *addr2)
|
{
|
{
|
if (addr1->sa.sa_family != addr2->sa.sa_family)
|
if (addr1->sa.sa_family != addr2->sa.sa_family)
|
return 0;
|
return 0;
|
if (addr1->v4.sin_port != addr2->v4.sin_port)
|
if (addr1->v4.sin_port != addr2->v4.sin_port)
|
return 0;
|
return 0;
|
if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr)
|
if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr)
|
return 0;
|
return 0;
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Initialize addr struct to INADDR_ANY. */
|
/* 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, unsigned short port)
|
{
|
{
|
addr->v4.sin_family = AF_INET;
|
addr->v4.sin_family = AF_INET;
|
addr->v4.sin_addr.s_addr = INADDR_ANY;
|
addr->v4.sin_addr.s_addr = INADDR_ANY;
|
addr->v4.sin_port = port;
|
addr->v4.sin_port = port;
|
}
|
}
|
|
|
/* Is this a wildcard address? */
|
/* Is this a wildcard address? */
|
static int sctp_v4_is_any(const union sctp_addr *addr)
|
static int sctp_v4_is_any(const union sctp_addr *addr)
|
{
|
{
|
return INADDR_ANY == addr->v4.sin_addr.s_addr;
|
return INADDR_ANY == addr->v4.sin_addr.s_addr;
|
}
|
}
|
|
|
/* This function checks if the address is a valid address to be used for
|
/* This function checks if the address is a valid address to be used for
|
* SCTP binding.
|
* SCTP binding.
|
*
|
*
|
* Output:
|
* Output:
|
* Return 0 - If the address is a non-unicast or an illegal address.
|
* Return 0 - If the address is a non-unicast or an illegal address.
|
* Return 1 - If the address is a unicast.
|
* Return 1 - If the address is a unicast.
|
*/
|
*/
|
static int sctp_v4_addr_valid(union sctp_addr *addr, struct sctp_opt *sp)
|
static int sctp_v4_addr_valid(union sctp_addr *addr, struct sctp_opt *sp)
|
{
|
{
|
/* Is this a non-unicast address or a unusable SCTP address? */
|
/* 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;
|
return 0;
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Should this be available for binding? */
|
/* Should this be available for binding? */
|
static int sctp_v4_available(union sctp_addr *addr, struct sctp_opt *sp)
|
static int sctp_v4_available(union sctp_addr *addr, struct sctp_opt *sp)
|
{
|
{
|
int ret = inet_addr_type(addr->v4.sin_addr.s_addr);
|
int ret = inet_addr_type(addr->v4.sin_addr.s_addr);
|
|
|
/* FIXME: ip_nonlocal_bind sysctl support. */
|
/* FIXME: ip_nonlocal_bind sysctl support. */
|
|
|
if (addr->v4.sin_addr.s_addr != INADDR_ANY && ret != RTN_LOCAL)
|
if (addr->v4.sin_addr.s_addr != INADDR_ANY && ret != RTN_LOCAL)
|
return 0;
|
return 0;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Checking the loopback, private and other address scopes as defined in
|
/* Checking the loopback, private and other address scopes as defined in
|
* RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4
|
* RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4
|
* scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>.
|
* scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>.
|
*
|
*
|
* Level 0 - unusable SCTP addresses
|
* Level 0 - unusable SCTP addresses
|
* Level 1 - loopback address
|
* Level 1 - loopback address
|
* Level 2 - link-local addresses
|
* Level 2 - link-local addresses
|
* Level 3 - private addresses.
|
* Level 3 - private addresses.
|
* Level 4 - global addresses
|
* Level 4 - global addresses
|
* For INIT and INIT-ACK address list, let L be the level of
|
* For INIT and INIT-ACK address list, let L be the level of
|
* of requested destination address, sender and receiver
|
* of requested destination address, sender and receiver
|
* SHOULD include all of its addresses with level greater
|
* SHOULD include all of its addresses with level greater
|
* than or equal to L.
|
* than or equal to L.
|
*/
|
*/
|
static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
|
static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
|
{
|
{
|
sctp_scope_t retval;
|
sctp_scope_t retval;
|
|
|
/* Should IPv4 scoping be a sysctl configurable option
|
/* Should IPv4 scoping be a sysctl configurable option
|
* so users can turn it off (default on) for certain
|
* so users can turn it off (default on) for certain
|
* unconventional networking environments?
|
* unconventional networking environments?
|
*/
|
*/
|
|
|
/* Check for unusable SCTP addresses. */
|
/* 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;
|
retval = SCTP_SCOPE_UNUSABLE;
|
} else if (LOOPBACK(addr->v4.sin_addr.s_addr)) {
|
} else if (LOOPBACK(addr->v4.sin_addr.s_addr)) {
|
retval = SCTP_SCOPE_LOOPBACK;
|
retval = SCTP_SCOPE_LOOPBACK;
|
} else if (IS_IPV4_LINK_ADDRESS(&addr->v4.sin_addr.s_addr)) {
|
} else if (IS_IPV4_LINK_ADDRESS(&addr->v4.sin_addr.s_addr)) {
|
retval = SCTP_SCOPE_LINK;
|
retval = SCTP_SCOPE_LINK;
|
} else if (IS_IPV4_PRIVATE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
|
} else if (IS_IPV4_PRIVATE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
|
retval = SCTP_SCOPE_PRIVATE;
|
retval = SCTP_SCOPE_PRIVATE;
|
} else {
|
} else {
|
retval = SCTP_SCOPE_GLOBAL;
|
retval = SCTP_SCOPE_GLOBAL;
|
}
|
}
|
|
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/* Returns a valid dst cache entry for the given source and destination ip
|
/* Returns a valid dst cache entry for the given source and destination ip
|
* addresses. If an association is passed, trys to get a dst entry with a
|
* addresses. If an association is passed, trys to get a dst entry with a
|
* source address that matches an address in the bind address list.
|
* source address that matches an address in the bind address list.
|
*/
|
*/
|
struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
|
struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
|
union sctp_addr *daddr,
|
union sctp_addr *daddr,
|
union sctp_addr *saddr)
|
union sctp_addr *saddr)
|
{
|
{
|
struct rtable *rt;
|
struct rtable *rt;
|
struct rt_key key;
|
struct rt_key key;
|
struct sctp_bind_addr *bp;
|
struct sctp_bind_addr *bp;
|
rwlock_t *addr_lock;
|
rwlock_t *addr_lock;
|
struct sctp_sockaddr_entry *laddr;
|
struct sctp_sockaddr_entry *laddr;
|
struct list_head *pos;
|
struct list_head *pos;
|
struct dst_entry *dst = NULL;
|
struct dst_entry *dst = NULL;
|
union sctp_addr dst_saddr;
|
union sctp_addr dst_saddr;
|
|
|
memset(&key, 0x0, sizeof(struct rt_key));
|
memset(&key, 0x0, sizeof(struct rt_key));
|
key.dst = daddr->v4.sin_addr.s_addr;
|
key.dst = daddr->v4.sin_addr.s_addr;
|
|
|
if (asoc) {
|
if (asoc) {
|
key.tos = RT_CONN_FLAGS(asoc->base.sk);
|
key.tos = RT_CONN_FLAGS(asoc->base.sk);
|
key.oif = asoc->base.sk->bound_dev_if;
|
key.oif = asoc->base.sk->bound_dev_if;
|
}
|
}
|
if (saddr)
|
if (saddr)
|
key.src = saddr->v4.sin_addr.s_addr;
|
key.src = saddr->v4.sin_addr.s_addr;
|
|
|
SCTP_DEBUG_PRINTK("%s: DST:%u.%u.%u.%u, SRC:%u.%u.%u.%u - ",
|
SCTP_DEBUG_PRINTK("%s: DST:%u.%u.%u.%u, SRC:%u.%u.%u.%u - ",
|
__FUNCTION__, NIPQUAD(key.dst),
|
__FUNCTION__, NIPQUAD(key.dst),
|
NIPQUAD(key.src));
|
NIPQUAD(key.src));
|
|
|
if (!ip_route_output_key(&rt, &key)) {
|
if (!ip_route_output_key(&rt, &key)) {
|
dst = &rt->u.dst;
|
dst = &rt->u.dst;
|
}
|
}
|
|
|
/* If there is no association or if a source address is passed, no
|
/* If there is no association or if a source address is passed, no
|
* more validation is required.
|
* more validation is required.
|
*/
|
*/
|
if (!asoc || saddr)
|
if (!asoc || saddr)
|
goto out;
|
goto out;
|
|
|
bp = &asoc->base.bind_addr;
|
bp = &asoc->base.bind_addr;
|
addr_lock = &asoc->base.addr_lock;
|
addr_lock = &asoc->base.addr_lock;
|
|
|
if (dst) {
|
if (dst) {
|
/* Walk through the bind address list and look for a bind
|
/* Walk through the bind address list and look for a bind
|
* address that matches the source address of the returned dst.
|
* address that matches the source address of the returned dst.
|
*/
|
*/
|
sctp_read_lock(addr_lock);
|
sctp_read_lock(addr_lock);
|
list_for_each(pos, &bp->address_list) {
|
list_for_each(pos, &bp->address_list) {
|
laddr = list_entry(pos, struct sctp_sockaddr_entry,
|
laddr = list_entry(pos, struct sctp_sockaddr_entry,
|
list);
|
list);
|
sctp_v4_dst_saddr(&dst_saddr, dst, bp->port);
|
sctp_v4_dst_saddr(&dst_saddr, dst, bp->port);
|
if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
|
if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
|
goto out_unlock;
|
goto out_unlock;
|
}
|
}
|
sctp_read_unlock(addr_lock);
|
sctp_read_unlock(addr_lock);
|
|
|
/* None of the bound addresses match the source address of the
|
/* None of the bound addresses match the source address of the
|
* dst. So release it.
|
* dst. So release it.
|
*/
|
*/
|
dst_release(dst);
|
dst_release(dst);
|
dst = NULL;
|
dst = NULL;
|
}
|
}
|
|
|
/* Walk through the bind address list and try to get a dst that
|
/* Walk through the bind address list and try to get a dst that
|
* matches a bind address as the source address.
|
* matches a bind address as the source address.
|
*/
|
*/
|
sctp_read_lock(addr_lock);
|
sctp_read_lock(addr_lock);
|
list_for_each(pos, &bp->address_list) {
|
list_for_each(pos, &bp->address_list) {
|
laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
|
|
if (AF_INET == laddr->a.sa.sa_family) {
|
if (AF_INET == laddr->a.sa.sa_family) {
|
key.src = laddr->a.v4.sin_addr.s_addr;
|
key.src = laddr->a.v4.sin_addr.s_addr;
|
if (!ip_route_output_key(&rt, &key)) {
|
if (!ip_route_output_key(&rt, &key)) {
|
dst = &rt->u.dst;
|
dst = &rt->u.dst;
|
goto out_unlock;
|
goto out_unlock;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
out_unlock:
|
out_unlock:
|
sctp_read_unlock(addr_lock);
|
sctp_read_unlock(addr_lock);
|
out:
|
out:
|
if (dst)
|
if (dst)
|
SCTP_DEBUG_PRINTK("rt_dst:%u.%u.%u.%u, rt_src:%u.%u.%u.%u\n",
|
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
|
else
|
SCTP_DEBUG_PRINTK("NO ROUTE\n");
|
SCTP_DEBUG_PRINTK("NO ROUTE\n");
|
|
|
return dst;
|
return dst;
|
}
|
}
|
|
|
/* For v4, the source address is cached in the route entry(dst). So no need
|
/* For v4, the source address is cached in the route entry(dst). So no need
|
* to cache it separately and hence this is an empty routine.
|
* to cache it separately and hence this is an empty routine.
|
*/
|
*/
|
void sctp_v4_get_saddr(struct sctp_association *asoc,
|
void sctp_v4_get_saddr(struct sctp_association *asoc,
|
struct dst_entry *dst,
|
struct dst_entry *dst,
|
union sctp_addr *daddr,
|
union sctp_addr *daddr,
|
union sctp_addr *saddr)
|
union sctp_addr *saddr)
|
{
|
{
|
struct rtable *rt = (struct rtable *)dst;
|
struct rtable *rt = (struct rtable *)dst;
|
|
|
if (rt) {
|
if (rt) {
|
saddr->v4.sin_family = AF_INET;
|
saddr->v4.sin_family = AF_INET;
|
saddr->v4.sin_port = asoc->base.bind_addr.port;
|
saddr->v4.sin_port = asoc->base.bind_addr.port;
|
saddr->v4.sin_addr.s_addr = rt->rt_src;
|
saddr->v4.sin_addr.s_addr = rt->rt_src;
|
}
|
}
|
}
|
}
|
|
|
/* What interface did this skb arrive on? */
|
/* What interface did this skb arrive on? */
|
static int sctp_v4_skb_iif(const struct sk_buff *skb)
|
static int sctp_v4_skb_iif(const struct sk_buff *skb)
|
{
|
{
|
return ((struct rtable *)skb->dst)->rt_iif;
|
return ((struct rtable *)skb->dst)->rt_iif;
|
}
|
}
|
|
|
/* Was this packet marked by Explicit Congestion Notification? */
|
/* Was this packet marked by Explicit Congestion Notification? */
|
static int sctp_v4_is_ce(const struct sk_buff *skb)
|
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(skb->nh.iph->tos);
|
}
|
}
|
|
|
/* Create and initialize a new sk for the socket returned by accept(). */
|
/* Create and initialize a new sk for the socket returned by accept(). */
|
struct sock *sctp_v4_create_accept_sk(struct sock *sk,
|
struct sock *sctp_v4_create_accept_sk(struct sock *sk,
|
struct sctp_association *asoc)
|
struct sctp_association *asoc)
|
{
|
{
|
struct sock *newsk;
|
struct sock *newsk;
|
struct inet_opt *inet = inet_sk(sk);
|
struct inet_opt *inet = inet_sk(sk);
|
struct inet_opt *newinet;
|
struct inet_opt *newinet;
|
|
|
newsk = sk_alloc(PF_INET, GFP_KERNEL, sizeof(struct sock));
|
newsk = sk_alloc(PF_INET, GFP_KERNEL, sizeof(struct sock));
|
if (!newsk)
|
if (!newsk)
|
goto out;
|
goto out;
|
|
|
sock_init_data(NULL, newsk);
|
sock_init_data(NULL, newsk);
|
sk_set_owner(newsk, THIS_MODULE);
|
sk_set_owner(newsk, THIS_MODULE);
|
|
|
newsk->sk_type = SOCK_STREAM;
|
newsk->sk_type = SOCK_STREAM;
|
|
|
newsk->sk_prot = sk->sk_prot;
|
newsk->sk_prot = sk->sk_prot;
|
newsk->sk_no_check = sk->sk_no_check;
|
newsk->sk_no_check = sk->sk_no_check;
|
newsk->sk_reuse = sk->sk_reuse;
|
newsk->sk_reuse = sk->sk_reuse;
|
newsk->sk_shutdown = sk->sk_shutdown;
|
newsk->sk_shutdown = sk->sk_shutdown;
|
|
|
newsk->sk_destruct = inet_sock_destruct;
|
newsk->sk_destruct = inet_sock_destruct;
|
newsk->sk_zapped = 0;
|
newsk->sk_zapped = 0;
|
newsk->sk_family = PF_INET;
|
newsk->sk_family = PF_INET;
|
newsk->sk_protocol = IPPROTO_SCTP;
|
newsk->sk_protocol = IPPROTO_SCTP;
|
newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
|
newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
|
|
|
newinet = inet_sk(newsk);
|
newinet = inet_sk(newsk);
|
|
|
/* Initialize sk's sport, dport, rcv_saddr and daddr for
|
/* Initialize sk's sport, dport, rcv_saddr and daddr for
|
* getsockname() and getpeername()
|
* getsockname() and getpeername()
|
*/
|
*/
|
newsk->sport = sk->sport;
|
newsk->sport = sk->sport;
|
newsk->saddr = sk->saddr;
|
newsk->saddr = sk->saddr;
|
newsk->rcv_saddr = sk->rcv_saddr;
|
newsk->rcv_saddr = sk->rcv_saddr;
|
newsk->dport = htons(asoc->peer.port);
|
newsk->dport = htons(asoc->peer.port);
|
newsk->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
|
newsk->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
|
newinet->pmtudisc = inet->pmtudisc;
|
newinet->pmtudisc = inet->pmtudisc;
|
newinet->id = 0;
|
newinet->id = 0;
|
|
|
newinet->ttl = sysctl_ip_default_ttl;
|
newinet->ttl = sysctl_ip_default_ttl;
|
newinet->mc_loop = 1;
|
newinet->mc_loop = 1;
|
newinet->mc_ttl = 1;
|
newinet->mc_ttl = 1;
|
newinet->mc_index = 0;
|
newinet->mc_index = 0;
|
newinet->mc_list = NULL;
|
newinet->mc_list = NULL;
|
|
|
#ifdef INET_REFCNT_DEBUG
|
#ifdef INET_REFCNT_DEBUG
|
atomic_inc(&inet_sock_nr);
|
atomic_inc(&inet_sock_nr);
|
#endif
|
#endif
|
|
|
if (newsk->sk_prot->init(newsk)) {
|
if (newsk->sk_prot->init(newsk)) {
|
inet_sock_release(newsk);
|
inet_sock_release(newsk);
|
newsk = NULL;
|
newsk = NULL;
|
}
|
}
|
|
|
out:
|
out:
|
return newsk;
|
return newsk;
|
}
|
}
|
|
|
/* Map address, empty for v4 family */
|
/* Map address, empty for v4 family */
|
static void sctp_v4_addr_v4map(struct sctp_opt *sp, union sctp_addr *addr)
|
static void sctp_v4_addr_v4map(struct sctp_opt *sp, union sctp_addr *addr)
|
{
|
{
|
/* Empty */
|
/* Empty */
|
}
|
}
|
|
|
/* Dump the v4 addr to the seq file. */
|
/* Dump the v4 addr to the seq file. */
|
static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
|
static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
|
{
|
{
|
seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr));
|
seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr));
|
}
|
}
|
|
|
/* Event handler for inet address addition/deletion events.
|
/* Event handler for inet address addition/deletion events.
|
* Basically, whenever there is an event, we re-build our local address list.
|
* Basically, whenever there is an event, we re-build our local address list.
|
*/
|
*/
|
static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
|
static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
|
void *ptr)
|
void *ptr)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
|
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
|
__sctp_free_local_addr_list();
|
__sctp_free_local_addr_list();
|
__sctp_get_local_addr_list();
|
__sctp_get_local_addr_list();
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
|
|
|
return NOTIFY_DONE;
|
return NOTIFY_DONE;
|
}
|
}
|
|
|
/*
|
/*
|
* Initialize the control inode/socket with a control endpoint data
|
* Initialize the control inode/socket with a control endpoint data
|
* structure. This endpoint is reserved exclusively for the OOTB processing.
|
* structure. This endpoint is reserved exclusively for the OOTB processing.
|
*/
|
*/
|
int sctp_ctl_sock_init(void)
|
int sctp_ctl_sock_init(void)
|
{
|
{
|
int err;
|
int err;
|
sa_family_t family;
|
sa_family_t family;
|
|
|
if (sctp_get_pf_specific(PF_INET6))
|
if (sctp_get_pf_specific(PF_INET6))
|
family = PF_INET6;
|
family = PF_INET6;
|
else
|
else
|
family = PF_INET;
|
family = PF_INET;
|
|
|
err = sock_create(family, SOCK_SEQPACKET, IPPROTO_SCTP,
|
err = sock_create(family, SOCK_SEQPACKET, IPPROTO_SCTP,
|
&sctp_ctl_socket);
|
&sctp_ctl_socket);
|
if (err < 0) {
|
if (err < 0) {
|
printk(KERN_ERR
|
printk(KERN_ERR
|
"SCTP: Failed to create the SCTP control socket.\n");
|
"SCTP: Failed to create the SCTP control socket.\n");
|
return err;
|
return err;
|
}
|
}
|
sctp_ctl_socket->sk->sk_allocation = GFP_ATOMIC;
|
sctp_ctl_socket->sk->sk_allocation = GFP_ATOMIC;
|
inet_sk(sctp_ctl_socket->sk)->ttl = MAXTTL;
|
inet_sk(sctp_ctl_socket->sk)->ttl = MAXTTL;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Register address family specific functions. */
|
/* Register address family specific functions. */
|
int sctp_register_af(struct sctp_af *af)
|
int sctp_register_af(struct sctp_af *af)
|
{
|
{
|
switch (af->sa_family) {
|
switch (af->sa_family) {
|
case AF_INET:
|
case AF_INET:
|
if (sctp_af_v4_specific)
|
if (sctp_af_v4_specific)
|
return 0;
|
return 0;
|
sctp_af_v4_specific = af;
|
sctp_af_v4_specific = af;
|
break;
|
break;
|
case AF_INET6:
|
case AF_INET6:
|
if (sctp_af_v6_specific)
|
if (sctp_af_v6_specific)
|
return 0;
|
return 0;
|
sctp_af_v6_specific = af;
|
sctp_af_v6_specific = af;
|
break;
|
break;
|
default:
|
default:
|
return 0;
|
return 0;
|
}
|
}
|
|
|
INIT_LIST_HEAD(&af->list);
|
INIT_LIST_HEAD(&af->list);
|
list_add_tail(&af->list, &sctp_address_families);
|
list_add_tail(&af->list, &sctp_address_families);
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Get the table of functions for manipulating a particular address
|
/* Get the table of functions for manipulating a particular address
|
* family.
|
* family.
|
*/
|
*/
|
struct sctp_af *sctp_get_af_specific(sa_family_t family)
|
struct sctp_af *sctp_get_af_specific(sa_family_t family)
|
{
|
{
|
switch (family) {
|
switch (family) {
|
case AF_INET:
|
case AF_INET:
|
return sctp_af_v4_specific;
|
return sctp_af_v4_specific;
|
case AF_INET6:
|
case AF_INET6:
|
return sctp_af_v6_specific;
|
return sctp_af_v6_specific;
|
default:
|
default:
|
return NULL;
|
return NULL;
|
}
|
}
|
}
|
}
|
|
|
/* Common code to initialize a AF_INET msg_name. */
|
/* Common code to initialize a AF_INET msg_name. */
|
static void sctp_inet_msgname(char *msgname, int *addr_len)
|
static void sctp_inet_msgname(char *msgname, int *addr_len)
|
{
|
{
|
struct sockaddr_in *sin;
|
struct sockaddr_in *sin;
|
|
|
sin = (struct sockaddr_in *)msgname;
|
sin = (struct sockaddr_in *)msgname;
|
*addr_len = sizeof(struct sockaddr_in);
|
*addr_len = sizeof(struct sockaddr_in);
|
sin->sin_family = AF_INET;
|
sin->sin_family = AF_INET;
|
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
|
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
|
}
|
}
|
|
|
/* Copy the primary address of the peer primary address as the msg_name. */
|
/* Copy the primary address of the peer primary address as the msg_name. */
|
static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
|
static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
|
int *addr_len)
|
int *addr_len)
|
{
|
{
|
struct sockaddr_in *sin, *sinfrom;
|
struct sockaddr_in *sin, *sinfrom;
|
|
|
if (msgname) {
|
if (msgname) {
|
struct sctp_association *asoc;
|
struct sctp_association *asoc;
|
|
|
asoc = event->sndrcvinfo.sinfo_assoc_id;
|
asoc = event->sndrcvinfo.sinfo_assoc_id;
|
sctp_inet_msgname(msgname, addr_len);
|
sctp_inet_msgname(msgname, addr_len);
|
sin = (struct sockaddr_in *)msgname;
|
sin = (struct sockaddr_in *)msgname;
|
sinfrom = &asoc->peer.primary_addr.v4;
|
sinfrom = &asoc->peer.primary_addr.v4;
|
sin->sin_port = htons(asoc->peer.port);
|
sin->sin_port = htons(asoc->peer.port);
|
sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr;
|
sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr;
|
}
|
}
|
}
|
}
|
|
|
/* Initialize and copy out a msgname from an inbound skb. */
|
/* Initialize and copy out a msgname from an inbound skb. */
|
static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
|
static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
|
{
|
{
|
struct sctphdr *sh;
|
struct sctphdr *sh;
|
struct sockaddr_in *sin;
|
struct sockaddr_in *sin;
|
|
|
if (msgname) {
|
if (msgname) {
|
sctp_inet_msgname(msgname, len);
|
sctp_inet_msgname(msgname, len);
|
sin = (struct sockaddr_in *)msgname;
|
sin = (struct sockaddr_in *)msgname;
|
sh = (struct sctphdr *)skb->h.raw;
|
sh = (struct sctphdr *)skb->h.raw;
|
sin->sin_port = sh->source;
|
sin->sin_port = sh->source;
|
sin->sin_addr.s_addr = skb->nh.iph->saddr;
|
sin->sin_addr.s_addr = skb->nh.iph->saddr;
|
}
|
}
|
}
|
}
|
|
|
/* Do we support this AF? */
|
/* Do we support this AF? */
|
static int sctp_inet_af_supported(sa_family_t family, struct sctp_opt *sp)
|
static int sctp_inet_af_supported(sa_family_t family, struct sctp_opt *sp)
|
{
|
{
|
/* PF_INET only supports AF_INET addresses. */
|
/* PF_INET only supports AF_INET addresses. */
|
return (AF_INET == family);
|
return (AF_INET == family);
|
}
|
}
|
|
|
/* Address matching with wildcards allowed. */
|
/* Address matching with wildcards allowed. */
|
static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
|
static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
|
const union sctp_addr *addr2,
|
const union sctp_addr *addr2,
|
struct sctp_opt *opt)
|
struct sctp_opt *opt)
|
{
|
{
|
/* PF_INET only supports AF_INET addresses. */
|
/* PF_INET only supports AF_INET addresses. */
|
if (addr1->sa.sa_family != addr2->sa.sa_family)
|
if (addr1->sa.sa_family != addr2->sa.sa_family)
|
return 0;
|
return 0;
|
if (INADDR_ANY == addr1->v4.sin_addr.s_addr ||
|
if (INADDR_ANY == addr1->v4.sin_addr.s_addr ||
|
INADDR_ANY == addr2->v4.sin_addr.s_addr)
|
INADDR_ANY == addr2->v4.sin_addr.s_addr)
|
return 1;
|
return 1;
|
if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
|
if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
|
return 1;
|
return 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Verify that provided sockaddr looks bindable. Common verification has
|
/* Verify that provided sockaddr looks bindable. Common verification has
|
* already been taken care of.
|
* already been taken care of.
|
*/
|
*/
|
static int sctp_inet_bind_verify(struct sctp_opt *opt, union sctp_addr *addr)
|
static int sctp_inet_bind_verify(struct sctp_opt *opt, union sctp_addr *addr)
|
{
|
{
|
return sctp_v4_available(addr, opt);
|
return sctp_v4_available(addr, opt);
|
}
|
}
|
|
|
/* Verify that sockaddr looks sendable. Common verification has already
|
/* Verify that sockaddr looks sendable. Common verification has already
|
* been taken care of.
|
* been taken care of.
|
*/
|
*/
|
static int sctp_inet_send_verify(struct sctp_opt *opt, union sctp_addr *addr)
|
static int sctp_inet_send_verify(struct sctp_opt *opt, union sctp_addr *addr)
|
{
|
{
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Fill in Supported Address Type information for INIT and INIT-ACK
|
/* Fill in Supported Address Type information for INIT and INIT-ACK
|
* chunks. Returns number of addresses supported.
|
* chunks. Returns number of addresses supported.
|
*/
|
*/
|
static int sctp_inet_supported_addrs(const struct sctp_opt *opt,
|
static int sctp_inet_supported_addrs(const struct sctp_opt *opt,
|
__u16 *types)
|
__u16 *types)
|
{
|
{
|
types[0] = SCTP_PARAM_IPV4_ADDRESS;
|
types[0] = SCTP_PARAM_IPV4_ADDRESS;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Wrapper routine that calls the ip transmit routine. */
|
/* Wrapper routine that calls the ip transmit routine. */
|
static inline int sctp_v4_xmit(struct sk_buff *skb,
|
static inline int sctp_v4_xmit(struct sk_buff *skb,
|
struct sctp_transport *transport, int ipfragok)
|
struct sctp_transport *transport, int ipfragok)
|
{
|
{
|
SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
|
SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
|
"src:%u.%u.%u.%u, dst:%u.%u.%u.%u\n",
|
"src:%u.%u.%u.%u, dst:%u.%u.%u.%u\n",
|
__FUNCTION__, skb, skb->len,
|
__FUNCTION__, skb, skb->len,
|
NIPQUAD(((struct rtable *)skb->dst)->rt_src),
|
NIPQUAD(((struct rtable *)skb->dst)->rt_src),
|
NIPQUAD(((struct rtable *)skb->dst)->rt_dst));
|
NIPQUAD(((struct rtable *)skb->dst)->rt_dst));
|
|
|
SCTP_INC_STATS(SctpOutSCTPPacks);
|
SCTP_INC_STATS(SctpOutSCTPPacks);
|
return ip_queue_xmit(skb, ipfragok);
|
return ip_queue_xmit(skb, ipfragok);
|
}
|
}
|
|
|
struct sctp_af sctp_ipv4_specific;
|
struct sctp_af sctp_ipv4_specific;
|
|
|
static struct sctp_pf sctp_pf_inet = {
|
static struct sctp_pf sctp_pf_inet = {
|
.event_msgname = sctp_inet_event_msgname,
|
.event_msgname = sctp_inet_event_msgname,
|
.skb_msgname = sctp_inet_skb_msgname,
|
.skb_msgname = sctp_inet_skb_msgname,
|
.af_supported = sctp_inet_af_supported,
|
.af_supported = sctp_inet_af_supported,
|
.cmp_addr = sctp_inet_cmp_addr,
|
.cmp_addr = sctp_inet_cmp_addr,
|
.bind_verify = sctp_inet_bind_verify,
|
.bind_verify = sctp_inet_bind_verify,
|
.send_verify = sctp_inet_send_verify,
|
.send_verify = sctp_inet_send_verify,
|
.supported_addrs = sctp_inet_supported_addrs,
|
.supported_addrs = sctp_inet_supported_addrs,
|
.create_accept_sk = sctp_v4_create_accept_sk,
|
.create_accept_sk = sctp_v4_create_accept_sk,
|
.addr_v4map = sctp_v4_addr_v4map,
|
.addr_v4map = sctp_v4_addr_v4map,
|
.af = &sctp_ipv4_specific,
|
.af = &sctp_ipv4_specific,
|
};
|
};
|
|
|
/* Notifier for inetaddr addition/deletion events. */
|
/* Notifier for inetaddr addition/deletion events. */
|
struct notifier_block sctp_inetaddr_notifier = {
|
struct notifier_block sctp_inetaddr_notifier = {
|
.notifier_call = sctp_inetaddr_event,
|
.notifier_call = sctp_inetaddr_event,
|
};
|
};
|
|
|
/* Socket operations. */
|
/* Socket operations. */
|
struct proto_ops inet_seqpacket_ops = {
|
struct proto_ops inet_seqpacket_ops = {
|
.family = PF_INET,
|
.family = PF_INET,
|
.release = inet_release, /* Needs to be wrapped... */
|
.release = inet_release, /* Needs to be wrapped... */
|
.bind = inet_bind,
|
.bind = inet_bind,
|
.connect = inet_dgram_connect,
|
.connect = inet_dgram_connect,
|
.socketpair = sock_no_socketpair,
|
.socketpair = sock_no_socketpair,
|
.accept = inet_accept,
|
.accept = inet_accept,
|
.getname = inet_getname, /* Semantics are different. */
|
.getname = inet_getname, /* Semantics are different. */
|
.poll = sctp_poll,
|
.poll = sctp_poll,
|
.ioctl = inet_ioctl,
|
.ioctl = inet_ioctl,
|
.listen = sctp_inet_listen,
|
.listen = sctp_inet_listen,
|
.shutdown = inet_shutdown, /* Looks harmless. */
|
.shutdown = inet_shutdown, /* Looks harmless. */
|
.setsockopt = inet_setsockopt, /* IP_SOL IP_OPTION is a problem. */
|
.setsockopt = inet_setsockopt, /* IP_SOL IP_OPTION is a problem. */
|
.getsockopt = inet_getsockopt,
|
.getsockopt = inet_getsockopt,
|
.sendmsg = inet_sendmsg,
|
.sendmsg = inet_sendmsg,
|
.recvmsg = inet_recvmsg,
|
.recvmsg = inet_recvmsg,
|
.mmap = sock_no_mmap,
|
.mmap = sock_no_mmap,
|
.sendpage = sock_no_sendpage,
|
.sendpage = sock_no_sendpage,
|
};
|
};
|
|
|
/* Registration with AF_INET family. */
|
/* Registration with AF_INET family. */
|
static struct inet_protosw sctp_seqpacket_protosw = {
|
static struct inet_protosw sctp_seqpacket_protosw = {
|
.type = SOCK_SEQPACKET,
|
.type = SOCK_SEQPACKET,
|
.protocol = IPPROTO_SCTP,
|
.protocol = IPPROTO_SCTP,
|
.prot = &sctp_prot,
|
.prot = &sctp_prot,
|
.ops = &inet_seqpacket_ops,
|
.ops = &inet_seqpacket_ops,
|
.capability = -1,
|
.capability = -1,
|
.no_check = 0,
|
.no_check = 0,
|
.flags = SCTP_PROTOSW_FLAG
|
.flags = SCTP_PROTOSW_FLAG
|
};
|
};
|
static struct inet_protosw sctp_stream_protosw = {
|
static struct inet_protosw sctp_stream_protosw = {
|
.type = SOCK_STREAM,
|
.type = SOCK_STREAM,
|
.protocol = IPPROTO_SCTP,
|
.protocol = IPPROTO_SCTP,
|
.prot = &sctp_prot,
|
.prot = &sctp_prot,
|
.ops = &inet_seqpacket_ops,
|
.ops = &inet_seqpacket_ops,
|
.capability = -1,
|
.capability = -1,
|
.no_check = 0,
|
.no_check = 0,
|
.flags = SCTP_PROTOSW_FLAG
|
.flags = SCTP_PROTOSW_FLAG
|
};
|
};
|
|
|
/* Register with IP layer. */
|
/* Register with IP layer. */
|
static struct inet_protocol sctp_protocol = {
|
static struct inet_protocol sctp_protocol = {
|
.handler = sctp_rcv,
|
.handler = sctp_rcv,
|
.err_handler = sctp_v4_err,
|
.err_handler = sctp_v4_err,
|
.protocol = IPPROTO_SCTP,
|
.protocol = IPPROTO_SCTP,
|
.name = "SCTP"
|
.name = "SCTP"
|
};
|
};
|
|
|
/* IPv4 address related functions. */
|
/* IPv4 address related functions. */
|
struct sctp_af sctp_ipv4_specific = {
|
struct sctp_af sctp_ipv4_specific = {
|
.sctp_xmit = sctp_v4_xmit,
|
.sctp_xmit = sctp_v4_xmit,
|
.setsockopt = ip_setsockopt,
|
.setsockopt = ip_setsockopt,
|
.getsockopt = ip_getsockopt,
|
.getsockopt = ip_getsockopt,
|
.get_dst = sctp_v4_get_dst,
|
.get_dst = sctp_v4_get_dst,
|
.get_saddr = sctp_v4_get_saddr,
|
.get_saddr = sctp_v4_get_saddr,
|
.copy_addrlist = sctp_v4_copy_addrlist,
|
.copy_addrlist = sctp_v4_copy_addrlist,
|
.from_skb = sctp_v4_from_skb,
|
.from_skb = sctp_v4_from_skb,
|
.from_sk = sctp_v4_from_sk,
|
.from_sk = sctp_v4_from_sk,
|
.to_sk_saddr = sctp_v4_to_sk_saddr,
|
.to_sk_saddr = sctp_v4_to_sk_saddr,
|
.to_sk_daddr = sctp_v4_to_sk_daddr,
|
.to_sk_daddr = sctp_v4_to_sk_daddr,
|
.from_addr_param= sctp_v4_from_addr_param,
|
.from_addr_param= sctp_v4_from_addr_param,
|
.to_addr_param = sctp_v4_to_addr_param,
|
.to_addr_param = sctp_v4_to_addr_param,
|
.dst_saddr = sctp_v4_dst_saddr,
|
.dst_saddr = sctp_v4_dst_saddr,
|
.cmp_addr = sctp_v4_cmp_addr,
|
.cmp_addr = sctp_v4_cmp_addr,
|
.addr_valid = sctp_v4_addr_valid,
|
.addr_valid = sctp_v4_addr_valid,
|
.inaddr_any = sctp_v4_inaddr_any,
|
.inaddr_any = sctp_v4_inaddr_any,
|
.is_any = sctp_v4_is_any,
|
.is_any = sctp_v4_is_any,
|
.available = sctp_v4_available,
|
.available = sctp_v4_available,
|
.scope = sctp_v4_scope,
|
.scope = sctp_v4_scope,
|
.skb_iif = sctp_v4_skb_iif,
|
.skb_iif = sctp_v4_skb_iif,
|
.is_ce = sctp_v4_is_ce,
|
.is_ce = sctp_v4_is_ce,
|
.seq_dump_addr = sctp_v4_seq_dump_addr,
|
.seq_dump_addr = sctp_v4_seq_dump_addr,
|
.net_header_len = sizeof(struct iphdr),
|
.net_header_len = sizeof(struct iphdr),
|
.sockaddr_len = sizeof(struct sockaddr_in),
|
.sockaddr_len = sizeof(struct sockaddr_in),
|
.sa_family = AF_INET,
|
.sa_family = AF_INET,
|
};
|
};
|
|
|
struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
|
struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
|
|
|
switch (family) {
|
switch (family) {
|
case PF_INET:
|
case PF_INET:
|
return sctp_pf_inet_specific;
|
return sctp_pf_inet_specific;
|
case PF_INET6:
|
case PF_INET6:
|
return sctp_pf_inet6_specific;
|
return sctp_pf_inet6_specific;
|
default:
|
default:
|
return NULL;
|
return NULL;
|
}
|
}
|
}
|
}
|
|
|
/* Register the PF specific function table. */
|
/* Register the PF specific function table. */
|
int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
|
int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
|
{
|
{
|
switch (family) {
|
switch (family) {
|
case PF_INET:
|
case PF_INET:
|
if (sctp_pf_inet_specific)
|
if (sctp_pf_inet_specific)
|
return 0;
|
return 0;
|
sctp_pf_inet_specific = pf;
|
sctp_pf_inet_specific = pf;
|
break;
|
break;
|
case PF_INET6:
|
case PF_INET6:
|
if (sctp_pf_inet6_specific)
|
if (sctp_pf_inet6_specific)
|
return 0;
|
return 0;
|
sctp_pf_inet6_specific = pf;
|
sctp_pf_inet6_specific = pf;
|
break;
|
break;
|
default:
|
default:
|
return 0;
|
return 0;
|
}
|
}
|
return 1;
|
return 1;
|
}
|
}
|
|
|
static int __init init_sctp_mibs(void)
|
static int __init init_sctp_mibs(void)
|
{
|
{
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void cleanup_sctp_mibs(void)
|
static void cleanup_sctp_mibs(void)
|
{
|
{
|
return;
|
return;
|
}
|
}
|
|
|
/* Initialize the universe into something sensible. */
|
/* Initialize the universe into something sensible. */
|
__init int sctp_init(void)
|
__init int sctp_init(void)
|
{
|
{
|
int i;
|
int i;
|
int status = 0;
|
int status = 0;
|
unsigned long goal;
|
unsigned long goal;
|
int order;
|
int order;
|
|
|
/* SCTP_DEBUG sanity check. */
|
/* SCTP_DEBUG sanity check. */
|
if (!sctp_sanity_check())
|
if (!sctp_sanity_check())
|
return -EINVAL;
|
return -EINVAL;
|
|
|
/* Add SCTP to inet_protos hash table. */
|
/* Add SCTP to inet_protos hash table. */
|
inet_add_protocol(&sctp_protocol);
|
inet_add_protocol(&sctp_protocol);
|
|
|
/* Add SCTP(TCP and UDP style) to inetsw linked list. */
|
/* Add SCTP(TCP and UDP style) to inetsw linked list. */
|
inet_register_protosw(&sctp_seqpacket_protosw);
|
inet_register_protosw(&sctp_seqpacket_protosw);
|
inet_register_protosw(&sctp_stream_protosw);
|
inet_register_protosw(&sctp_stream_protosw);
|
|
|
/* Allocate cache pools. */
|
/* Allocate cache pools. */
|
sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
|
sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
|
sizeof(struct sctp_chunk),
|
sizeof(struct sctp_chunk),
|
0, SLAB_HWCACHE_ALIGN,
|
0, SLAB_HWCACHE_ALIGN,
|
NULL, NULL);
|
NULL, NULL);
|
if (!sctp_chunk_cachep)
|
if (!sctp_chunk_cachep)
|
goto err_chunk_cachep;
|
goto err_chunk_cachep;
|
|
|
/* Allocate and initialise sctp mibs. */
|
/* Allocate and initialise sctp mibs. */
|
status = init_sctp_mibs();
|
status = init_sctp_mibs();
|
if (status)
|
if (status)
|
goto err_init_mibs;
|
goto err_init_mibs;
|
|
|
/* Initialize proc fs directory. */
|
/* Initialize proc fs directory. */
|
sctp_proc_init();
|
sctp_proc_init();
|
|
|
/* Initialize object count debugging. */
|
/* Initialize object count debugging. */
|
sctp_dbg_objcnt_init();
|
sctp_dbg_objcnt_init();
|
|
|
/* Initialize the SCTP specific PF functions. */
|
/* Initialize the SCTP specific PF functions. */
|
sctp_register_pf(&sctp_pf_inet, PF_INET);
|
sctp_register_pf(&sctp_pf_inet, PF_INET);
|
/*
|
/*
|
* 14. Suggested SCTP Protocol Parameter Values
|
* 14. Suggested SCTP Protocol Parameter Values
|
*/
|
*/
|
/* The following protocol parameters are RECOMMENDED: */
|
/* The following protocol parameters are RECOMMENDED: */
|
/* RTO.Initial - 3 seconds */
|
/* RTO.Initial - 3 seconds */
|
sctp_rto_initial = SCTP_RTO_INITIAL;
|
sctp_rto_initial = SCTP_RTO_INITIAL;
|
/* RTO.Min - 1 second */
|
/* RTO.Min - 1 second */
|
sctp_rto_min = SCTP_RTO_MIN;
|
sctp_rto_min = SCTP_RTO_MIN;
|
/* RTO.Max - 60 seconds */
|
/* RTO.Max - 60 seconds */
|
sctp_rto_max = SCTP_RTO_MAX;
|
sctp_rto_max = SCTP_RTO_MAX;
|
/* RTO.Alpha - 1/8 */
|
/* RTO.Alpha - 1/8 */
|
sctp_rto_alpha = SCTP_RTO_ALPHA;
|
sctp_rto_alpha = SCTP_RTO_ALPHA;
|
/* RTO.Beta - 1/4 */
|
/* RTO.Beta - 1/4 */
|
sctp_rto_beta = SCTP_RTO_BETA;
|
sctp_rto_beta = SCTP_RTO_BETA;
|
/* Valid.Cookie.Life - 60 seconds */
|
/* Valid.Cookie.Life - 60 seconds */
|
sctp_valid_cookie_life = 60 * HZ;
|
sctp_valid_cookie_life = 60 * HZ;
|
|
|
/* Whether Cookie Preservative is enabled(1) or not(0) */
|
/* Whether Cookie Preservative is enabled(1) or not(0) */
|
sctp_cookie_preserve_enable = 1;
|
sctp_cookie_preserve_enable = 1;
|
|
|
/* Max.Burst - 4 */
|
/* Max.Burst - 4 */
|
sctp_max_burst = SCTP_MAX_BURST;
|
sctp_max_burst = SCTP_MAX_BURST;
|
|
|
/* Association.Max.Retrans - 10 attempts
|
/* Association.Max.Retrans - 10 attempts
|
* Path.Max.Retrans - 5 attempts (per destination address)
|
* Path.Max.Retrans - 5 attempts (per destination address)
|
* Max.Init.Retransmits - 8 attempts
|
* Max.Init.Retransmits - 8 attempts
|
*/
|
*/
|
sctp_max_retrans_association = 10;
|
sctp_max_retrans_association = 10;
|
sctp_max_retrans_path = 5;
|
sctp_max_retrans_path = 5;
|
sctp_max_retrans_init = 8;
|
sctp_max_retrans_init = 8;
|
|
|
/* HB.interval - 30 seconds */
|
/* HB.interval - 30 seconds */
|
sctp_hb_interval = 30 * HZ;
|
sctp_hb_interval = 30 * HZ;
|
|
|
/* Implementation specific variables. */
|
/* Implementation specific variables. */
|
|
|
/* Initialize default stream count setup information. */
|
/* Initialize default stream count setup information. */
|
sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
|
sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
|
sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
|
sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
|
|
|
/* Size and allocate the association hash table.
|
/* Size and allocate the association hash table.
|
* The methodology is similar to that of the tcp hash tables.
|
* The methodology is similar to that of the tcp hash tables.
|
*/
|
*/
|
if (num_physpages >= (128 * 1024))
|
if (num_physpages >= (128 * 1024))
|
goal = num_physpages >> (22 - PAGE_SHIFT);
|
goal = num_physpages >> (22 - PAGE_SHIFT);
|
else
|
else
|
goal = num_physpages >> (24 - PAGE_SHIFT);
|
goal = num_physpages >> (24 - PAGE_SHIFT);
|
|
|
for (order = 0; (1UL << order) < goal; order++)
|
for (order = 0; (1UL << order) < goal; order++)
|
;
|
;
|
|
|
do {
|
do {
|
sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE /
|
sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE /
|
sizeof(struct sctp_hashbucket);
|
sizeof(struct sctp_hashbucket);
|
if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
|
if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
|
continue;
|
continue;
|
sctp_assoc_hashtable = (struct sctp_hashbucket *)
|
sctp_assoc_hashtable = (struct sctp_hashbucket *)
|
__get_free_pages(GFP_ATOMIC, order);
|
__get_free_pages(GFP_ATOMIC, order);
|
} while (!sctp_assoc_hashtable && --order > 0);
|
} while (!sctp_assoc_hashtable && --order > 0);
|
if (!sctp_assoc_hashtable) {
|
if (!sctp_assoc_hashtable) {
|
printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
|
printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
|
status = -ENOMEM;
|
status = -ENOMEM;
|
goto err_ahash_alloc;
|
goto err_ahash_alloc;
|
}
|
}
|
for (i = 0; i < sctp_assoc_hashsize; i++) {
|
for (i = 0; i < sctp_assoc_hashsize; i++) {
|
sctp_assoc_hashtable[i].lock = RW_LOCK_UNLOCKED;
|
sctp_assoc_hashtable[i].lock = RW_LOCK_UNLOCKED;
|
sctp_assoc_hashtable[i].chain = NULL;
|
sctp_assoc_hashtable[i].chain = NULL;
|
}
|
}
|
|
|
/* Allocate and initialize the endpoint hash table. */
|
/* Allocate and initialize the endpoint hash table. */
|
sctp_ep_hashsize = 64;
|
sctp_ep_hashsize = 64;
|
sctp_ep_hashtable = (struct sctp_hashbucket *)
|
sctp_ep_hashtable = (struct sctp_hashbucket *)
|
kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
|
kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
|
if (!sctp_ep_hashtable) {
|
if (!sctp_ep_hashtable) {
|
printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
|
printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
|
status = -ENOMEM;
|
status = -ENOMEM;
|
goto err_ehash_alloc;
|
goto err_ehash_alloc;
|
}
|
}
|
for (i = 0; i < sctp_ep_hashsize; i++) {
|
for (i = 0; i < sctp_ep_hashsize; i++) {
|
sctp_ep_hashtable[i].lock = RW_LOCK_UNLOCKED;
|
sctp_ep_hashtable[i].lock = RW_LOCK_UNLOCKED;
|
sctp_ep_hashtable[i].chain = NULL;
|
sctp_ep_hashtable[i].chain = NULL;
|
}
|
}
|
|
|
/* Allocate and initialize the SCTP port hash table. */
|
/* Allocate and initialize the SCTP port hash table. */
|
do {
|
do {
|
sctp_port_hashsize = (1UL << order) * PAGE_SIZE /
|
sctp_port_hashsize = (1UL << order) * PAGE_SIZE /
|
sizeof(struct sctp_bind_hashbucket);
|
sizeof(struct sctp_bind_hashbucket);
|
if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
|
if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
|
continue;
|
continue;
|
sctp_port_hashtable = (struct sctp_bind_hashbucket *)
|
sctp_port_hashtable = (struct sctp_bind_hashbucket *)
|
__get_free_pages(GFP_ATOMIC, order);
|
__get_free_pages(GFP_ATOMIC, order);
|
} while (!sctp_port_hashtable && --order > 0);
|
} while (!sctp_port_hashtable && --order > 0);
|
if (!sctp_port_hashtable) {
|
if (!sctp_port_hashtable) {
|
printk(KERN_ERR "SCTP: Failed bind hash alloc.");
|
printk(KERN_ERR "SCTP: Failed bind hash alloc.");
|
status = -ENOMEM;
|
status = -ENOMEM;
|
goto err_bhash_alloc;
|
goto err_bhash_alloc;
|
}
|
}
|
for (i = 0; i < sctp_port_hashsize; i++) {
|
for (i = 0; i < sctp_port_hashsize; i++) {
|
sctp_port_hashtable[i].lock = SPIN_LOCK_UNLOCKED;
|
sctp_port_hashtable[i].lock = SPIN_LOCK_UNLOCKED;
|
sctp_port_hashtable[i].chain = NULL;
|
sctp_port_hashtable[i].chain = NULL;
|
}
|
}
|
|
|
sctp_port_alloc_lock = SPIN_LOCK_UNLOCKED;
|
sctp_port_alloc_lock = SPIN_LOCK_UNLOCKED;
|
sctp_port_rover = sysctl_local_port_range[0] - 1;
|
sctp_port_rover = sysctl_local_port_range[0] - 1;
|
|
|
printk(KERN_INFO "SCTP: Hash tables configured "
|
printk(KERN_INFO "SCTP: Hash tables configured "
|
"(established %d bind %d)\n",
|
"(established %d bind %d)\n",
|
sctp_assoc_hashsize, sctp_port_hashsize);
|
sctp_assoc_hashsize, sctp_port_hashsize);
|
|
|
/* Disable ADDIP by default. */
|
/* Disable ADDIP by default. */
|
sctp_addip_enable = 0;
|
sctp_addip_enable = 0;
|
|
|
sctp_sysctl_register();
|
sctp_sysctl_register();
|
|
|
INIT_LIST_HEAD(&sctp_address_families);
|
INIT_LIST_HEAD(&sctp_address_families);
|
sctp_register_af(&sctp_ipv4_specific);
|
sctp_register_af(&sctp_ipv4_specific);
|
|
|
status = sctp_v6_init();
|
status = sctp_v6_init();
|
if (status)
|
if (status)
|
goto err_v6_init;
|
goto err_v6_init;
|
|
|
/* Initialize the control inode/socket for handling OOTB packets. */
|
/* Initialize the control inode/socket for handling OOTB packets. */
|
if ((status = sctp_ctl_sock_init())) {
|
if ((status = sctp_ctl_sock_init())) {
|
printk (KERN_ERR
|
printk (KERN_ERR
|
"SCTP: Failed to initialize the SCTP control sock.\n");
|
"SCTP: Failed to initialize the SCTP control sock.\n");
|
goto err_ctl_sock_init;
|
goto err_ctl_sock_init;
|
}
|
}
|
|
|
/* Initialize the local address list. */
|
/* Initialize the local address list. */
|
INIT_LIST_HEAD(&sctp_local_addr_list);
|
INIT_LIST_HEAD(&sctp_local_addr_list);
|
sctp_local_addr_lock = SPIN_LOCK_UNLOCKED;
|
sctp_local_addr_lock = SPIN_LOCK_UNLOCKED;
|
|
|
/* Register notifier for inet address additions/deletions. */
|
/* Register notifier for inet address additions/deletions. */
|
register_inetaddr_notifier(&sctp_inetaddr_notifier);
|
register_inetaddr_notifier(&sctp_inetaddr_notifier);
|
|
|
sctp_get_local_addr_list();
|
sctp_get_local_addr_list();
|
|
|
__unsafe(THIS_MODULE);
|
__unsafe(THIS_MODULE);
|
return 0;
|
return 0;
|
|
|
err_ctl_sock_init:
|
err_ctl_sock_init:
|
sctp_v6_exit();
|
sctp_v6_exit();
|
err_v6_init:
|
err_v6_init:
|
sctp_sysctl_unregister();
|
sctp_sysctl_unregister();
|
list_del(&sctp_ipv4_specific.list);
|
list_del(&sctp_ipv4_specific.list);
|
free_pages((unsigned long)sctp_port_hashtable,
|
free_pages((unsigned long)sctp_port_hashtable,
|
get_order(sctp_port_hashsize *
|
get_order(sctp_port_hashsize *
|
sizeof(struct sctp_bind_hashbucket)));
|
sizeof(struct sctp_bind_hashbucket)));
|
err_bhash_alloc:
|
err_bhash_alloc:
|
kfree(sctp_ep_hashtable);
|
kfree(sctp_ep_hashtable);
|
err_ehash_alloc:
|
err_ehash_alloc:
|
free_pages((unsigned long)sctp_assoc_hashtable,
|
free_pages((unsigned long)sctp_assoc_hashtable,
|
get_order(sctp_assoc_hashsize *
|
get_order(sctp_assoc_hashsize *
|
sizeof(struct sctp_hashbucket)));
|
sizeof(struct sctp_hashbucket)));
|
err_ahash_alloc:
|
err_ahash_alloc:
|
sctp_dbg_objcnt_exit();
|
sctp_dbg_objcnt_exit();
|
sctp_proc_exit();
|
sctp_proc_exit();
|
cleanup_sctp_mibs();
|
cleanup_sctp_mibs();
|
err_init_mibs:
|
err_init_mibs:
|
kmem_cache_destroy(sctp_chunk_cachep);
|
kmem_cache_destroy(sctp_chunk_cachep);
|
err_chunk_cachep:
|
err_chunk_cachep:
|
inet_del_protocol(&sctp_protocol);
|
inet_del_protocol(&sctp_protocol);
|
inet_unregister_protosw(&sctp_seqpacket_protosw);
|
inet_unregister_protosw(&sctp_seqpacket_protosw);
|
inet_unregister_protosw(&sctp_stream_protosw);
|
inet_unregister_protosw(&sctp_stream_protosw);
|
return status;
|
return status;
|
}
|
}
|
|
|
/* Exit handler for the SCTP protocol. */
|
/* Exit handler for the SCTP protocol. */
|
__exit void sctp_exit(void)
|
__exit void sctp_exit(void)
|
{
|
{
|
/* BUG. This should probably do something useful like clean
|
/* BUG. This should probably do something useful like clean
|
* up all the remaining associations and all that memory.
|
* up all the remaining associations and all that memory.
|
*/
|
*/
|
|
|
/* Unregister notifier for inet address additions/deletions. */
|
/* Unregister notifier for inet address additions/deletions. */
|
unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
|
unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
|
|
|
/* Free the local address list. */
|
/* Free the local address list. */
|
sctp_free_local_addr_list();
|
sctp_free_local_addr_list();
|
|
|
/* Free the control endpoint. */
|
/* Free the control endpoint. */
|
sock_release(sctp_ctl_socket);
|
sock_release(sctp_ctl_socket);
|
|
|
sctp_v6_exit();
|
sctp_v6_exit();
|
sctp_sysctl_unregister();
|
sctp_sysctl_unregister();
|
list_del(&sctp_ipv4_specific.list);
|
list_del(&sctp_ipv4_specific.list);
|
|
|
free_pages((unsigned long)sctp_assoc_hashtable,
|
free_pages((unsigned long)sctp_assoc_hashtable,
|
get_order(sctp_assoc_hashsize *
|
get_order(sctp_assoc_hashsize *
|
sizeof(struct sctp_hashbucket)));
|
sizeof(struct sctp_hashbucket)));
|
kfree(sctp_ep_hashtable);
|
kfree(sctp_ep_hashtable);
|
free_pages((unsigned long)sctp_port_hashtable,
|
free_pages((unsigned long)sctp_port_hashtable,
|
get_order(sctp_port_hashsize *
|
get_order(sctp_port_hashsize *
|
sizeof(struct sctp_bind_hashbucket)));
|
sizeof(struct sctp_bind_hashbucket)));
|
|
|
kmem_cache_destroy(sctp_chunk_cachep);
|
kmem_cache_destroy(sctp_chunk_cachep);
|
|
|
sctp_dbg_objcnt_exit();
|
sctp_dbg_objcnt_exit();
|
sctp_proc_exit();
|
sctp_proc_exit();
|
cleanup_sctp_mibs();
|
cleanup_sctp_mibs();
|
|
|
inet_del_protocol(&sctp_protocol);
|
inet_del_protocol(&sctp_protocol);
|
inet_unregister_protosw(&sctp_seqpacket_protosw);
|
inet_unregister_protosw(&sctp_seqpacket_protosw);
|
inet_unregister_protosw(&sctp_stream_protosw);
|
inet_unregister_protosw(&sctp_stream_protosw);
|
}
|
}
|
|
|
module_init(sctp_init);
|
module_init(sctp_init);
|
module_exit(sctp_exit);
|
module_exit(sctp_exit);
|
|
|
MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
|
MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
|
MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
|
MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
|
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
|
|
