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authorKazunori MIYAZAWA <miyazawa@linux-ipv6.org>2007-02-13 12:54:47 -0800
committerDavid S. Miller <davem@davemloft.net>2007-02-13 12:54:47 -0800
commitc0d56408e3ff52d635441e0f08d12164a63728cf (patch)
tree026b531a00255730e9878905fdc2e6a910f4e1c7 /net/ipv4/tunnel4.c
parent[TCP]: Prevent pseudo garbage in SYN's advertized window (diff)
downloadlinux-dev-c0d56408e3ff52d635441e0f08d12164a63728cf.tar.xz
linux-dev-c0d56408e3ff52d635441e0f08d12164a63728cf.zip
[IPSEC]: Changing API of xfrm4_tunnel_register.
This patch changes xfrm4_tunnel register and deregister interface to prepare for solving the conflict of device tunnels with inter address family IPsec tunnel. Signed-off-by: Kazunori MIYAZAWA <miyazawa@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tunnel4.c')
-rw-r--r--net/ipv4/tunnel4.c50
1 files changed, 46 insertions, 4 deletions
diff --git a/net/ipv4/tunnel4.c b/net/ipv4/tunnel4.c
index 8d30c48f090e..a794a8ca8b4f 100644
--- a/net/ipv4/tunnel4.c
+++ b/net/ipv4/tunnel4.c
@@ -14,9 +14,10 @@
#include <net/xfrm.h>
static struct xfrm_tunnel *tunnel4_handlers;
+static struct xfrm_tunnel *tunnel64_handlers;
static DEFINE_MUTEX(tunnel4_mutex);
-int xfrm4_tunnel_register(struct xfrm_tunnel *handler)
+int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family)
{
struct xfrm_tunnel **pprev;
int ret = -EEXIST;
@@ -24,7 +25,8 @@ int xfrm4_tunnel_register(struct xfrm_tunnel *handler)
mutex_lock(&tunnel4_mutex);
- for (pprev = &tunnel4_handlers; *pprev; pprev = &(*pprev)->next) {
+ for (pprev = (family == AF_INET) ? &tunnel4_handlers : &tunnel64_handlers;
+ *pprev; pprev = &(*pprev)->next) {
if ((*pprev)->priority > priority)
break;
if ((*pprev)->priority == priority)
@@ -44,14 +46,15 @@ err:
EXPORT_SYMBOL(xfrm4_tunnel_register);
-int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler)
+int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family)
{
struct xfrm_tunnel **pprev;
int ret = -ENOENT;
mutex_lock(&tunnel4_mutex);
- for (pprev = &tunnel4_handlers; *pprev; pprev = &(*pprev)->next) {
+ for (pprev = (family == AF_INET) ? &tunnel4_handlers : &tunnel64_handlers;
+ *pprev; pprev = &(*pprev)->next) {
if (*pprev == handler) {
*pprev = handler->next;
ret = 0;
@@ -86,6 +89,26 @@ drop:
return 0;
}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static int tunnel64_rcv(struct sk_buff *skb)
+{
+ struct xfrm_tunnel *handler;
+
+ if (!pskb_may_pull(skb, sizeof(struct iphdr)))
+ goto drop;
+
+ for (handler = tunnel64_handlers; handler; handler = handler->next)
+ if (!handler->handler(skb))
+ return 0;
+
+ icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
+
+drop:
+ kfree_skb(skb);
+ return 0;
+}
+#endif
+
static void tunnel4_err(struct sk_buff *skb, u32 info)
{
struct xfrm_tunnel *handler;
@@ -101,17 +124,36 @@ static struct net_protocol tunnel4_protocol = {
.no_policy = 1,
};
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static struct net_protocol tunnel64_protocol = {
+ .handler = tunnel64_rcv,
+ .err_handler = tunnel4_err,
+ .no_policy = 1,
+};
+#endif
+
static int __init tunnel4_init(void)
{
if (inet_add_protocol(&tunnel4_protocol, IPPROTO_IPIP)) {
printk(KERN_ERR "tunnel4 init: can't add protocol\n");
return -EAGAIN;
}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ if (inet_add_protocol(&tunnel64_protocol, IPPROTO_IPV6)) {
+ printk(KERN_ERR "tunnel64 init: can't add protocol\n");
+ inet_del_protocol(&tunnel4_protocol, IPPROTO_IPIP);
+ return -EAGAIN;
+ }
+#endif
return 0;
}
static void __exit tunnel4_fini(void)
{
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ if (inet_del_protocol(&tunnel64_protocol, IPPROTO_IPV6))
+ printk(KERN_ERR "tunnel64 close: can't remove protocol\n");
+#endif
if (inet_del_protocol(&tunnel4_protocol, IPPROTO_IPIP))
printk(KERN_ERR "tunnel4 close: can't remove protocol\n");
}