mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Joe Perches](/assets/img/avatar_default.png)
Add #define pr_fmt(fmt) as appropriate. Add "IPv6: " to appropriate files. Convert printk(KERN_<LEVEL> to pr_<level> (but not KERN_DEBUG). Standardize on "%s: " not "%s(): " when emitting __func__. Use "%s: ", __func__ instead of embedding function name. Coalesce formats, align arguments. ADDRCONF output is now prefixed with "IPv6: " Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
186 lines
4.6 KiB
C
186 lines
4.6 KiB
C
/*
|
|
* Copyright (C)2003,2004 USAGI/WIDE Project
|
|
*
|
|
* This program 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 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Authors Mitsuru KANDA <mk@linux-ipv6.org>
|
|
* YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "IPv6: " fmt
|
|
|
|
#include <linux/icmpv6.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/slab.h>
|
|
#include <net/ipv6.h>
|
|
#include <net/protocol.h>
|
|
#include <net/xfrm.h>
|
|
|
|
static struct xfrm6_tunnel __rcu *tunnel6_handlers __read_mostly;
|
|
static struct xfrm6_tunnel __rcu *tunnel46_handlers __read_mostly;
|
|
static DEFINE_MUTEX(tunnel6_mutex);
|
|
|
|
int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family)
|
|
{
|
|
struct xfrm6_tunnel __rcu **pprev;
|
|
struct xfrm6_tunnel *t;
|
|
int ret = -EEXIST;
|
|
int priority = handler->priority;
|
|
|
|
mutex_lock(&tunnel6_mutex);
|
|
|
|
for (pprev = (family == AF_INET6) ? &tunnel6_handlers : &tunnel46_handlers;
|
|
(t = rcu_dereference_protected(*pprev,
|
|
lockdep_is_held(&tunnel6_mutex))) != NULL;
|
|
pprev = &t->next) {
|
|
if (t->priority > priority)
|
|
break;
|
|
if (t->priority == priority)
|
|
goto err;
|
|
}
|
|
|
|
handler->next = *pprev;
|
|
rcu_assign_pointer(*pprev, handler);
|
|
|
|
ret = 0;
|
|
|
|
err:
|
|
mutex_unlock(&tunnel6_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(xfrm6_tunnel_register);
|
|
|
|
int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family)
|
|
{
|
|
struct xfrm6_tunnel __rcu **pprev;
|
|
struct xfrm6_tunnel *t;
|
|
int ret = -ENOENT;
|
|
|
|
mutex_lock(&tunnel6_mutex);
|
|
|
|
for (pprev = (family == AF_INET6) ? &tunnel6_handlers : &tunnel46_handlers;
|
|
(t = rcu_dereference_protected(*pprev,
|
|
lockdep_is_held(&tunnel6_mutex))) != NULL;
|
|
pprev = &t->next) {
|
|
if (t == handler) {
|
|
*pprev = handler->next;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&tunnel6_mutex);
|
|
|
|
synchronize_net();
|
|
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(xfrm6_tunnel_deregister);
|
|
|
|
#define for_each_tunnel_rcu(head, handler) \
|
|
for (handler = rcu_dereference(head); \
|
|
handler != NULL; \
|
|
handler = rcu_dereference(handler->next)) \
|
|
|
|
static int tunnel6_rcv(struct sk_buff *skb)
|
|
{
|
|
struct xfrm6_tunnel *handler;
|
|
|
|
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
|
|
goto drop;
|
|
|
|
for_each_tunnel_rcu(tunnel6_handlers, handler)
|
|
if (!handler->handler(skb))
|
|
return 0;
|
|
|
|
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0);
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
static int tunnel46_rcv(struct sk_buff *skb)
|
|
{
|
|
struct xfrm6_tunnel *handler;
|
|
|
|
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
|
|
goto drop;
|
|
|
|
for_each_tunnel_rcu(tunnel46_handlers, handler)
|
|
if (!handler->handler(skb))
|
|
return 0;
|
|
|
|
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0);
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
static void tunnel6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
|
|
u8 type, u8 code, int offset, __be32 info)
|
|
{
|
|
struct xfrm6_tunnel *handler;
|
|
|
|
for_each_tunnel_rcu(tunnel6_handlers, handler)
|
|
if (!handler->err_handler(skb, opt, type, code, offset, info))
|
|
break;
|
|
}
|
|
|
|
static const struct inet6_protocol tunnel6_protocol = {
|
|
.handler = tunnel6_rcv,
|
|
.err_handler = tunnel6_err,
|
|
.flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
|
|
};
|
|
|
|
static const struct inet6_protocol tunnel46_protocol = {
|
|
.handler = tunnel46_rcv,
|
|
.err_handler = tunnel6_err,
|
|
.flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
|
|
};
|
|
|
|
static int __init tunnel6_init(void)
|
|
{
|
|
if (inet6_add_protocol(&tunnel6_protocol, IPPROTO_IPV6)) {
|
|
pr_err("%s: can't add protocol\n", __func__);
|
|
return -EAGAIN;
|
|
}
|
|
if (inet6_add_protocol(&tunnel46_protocol, IPPROTO_IPIP)) {
|
|
pr_err("%s: can't add protocol\n", __func__);
|
|
inet6_del_protocol(&tunnel6_protocol, IPPROTO_IPV6);
|
|
return -EAGAIN;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit tunnel6_fini(void)
|
|
{
|
|
if (inet6_del_protocol(&tunnel46_protocol, IPPROTO_IPIP))
|
|
pr_err("%s: can't remove protocol\n", __func__);
|
|
if (inet6_del_protocol(&tunnel6_protocol, IPPROTO_IPV6))
|
|
pr_err("%s: can't remove protocol\n", __func__);
|
|
}
|
|
|
|
module_init(tunnel6_init);
|
|
module_exit(tunnel6_fini);
|
|
MODULE_LICENSE("GPL");
|