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linux-sg2042
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[IPSEC]: make sit use the xfrm4_tunnel_register 

This patch makes sit use xfrm4_tunnel_register instead of
inet_add_protocol. It solves conflict of sit device with
inter address family IPsec tunnel.

Signed-off-by: Kazunori MIYAZAWA <miyazawa@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kazunori MIYAZAWA 2007-02-13 12:55:25 -08:00 committed by David S. Miller
parent c0d56408e3
commit c73cb5a2d6
2 changed files with 19 additions and 12 deletions
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1
net/ipv6/Kconfig
View File

@ -156,6 +156,7 @@ config INET6_XFRM_MODE_ROUTEOPTIMIZATION
config IPV6_SIT
tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
depends on IPV6
select INET_TUNNEL
default y
---help---
Tunneling means encapsulating data of one protocol type within

30
net/ipv6/sit.c
View File

@ -216,7 +216,7 @@ static void ipip6_tunnel_uninit(struct net_device *dev)
}
static void ipip6_err(struct sk_buff *skb, u32 info)
static int ipip6_err(struct sk_buff *skb, u32 info)
{
#ifndef I_WISH_WORLD_WERE_PERFECT
@ -228,21 +228,22 @@ static void ipip6_err(struct sk_buff *skb, u32 info)
int type = skb->h.icmph->type;
int code = skb->h.icmph->code;
struct ip_tunnel *t;
int err;
switch (type) {
default:
case ICMP_PARAMETERPROB:
return;
return 0;
case ICMP_DEST_UNREACH:
switch (code) {
case ICMP_SR_FAILED:
case ICMP_PORT_UNREACH:
/* Impossible event. */
return;
return 0;
case ICMP_FRAG_NEEDED:
/* Soft state for pmtu is maintained by IP core. */
return;
return 0;
default:
/* All others are translated to HOST_UNREACH.
rfc2003 contains "deep thoughts" about NET_UNREACH,
@ -253,14 +254,18 @@ static void ipip6_err(struct sk_buff *skb, u32 info)
break;
case ICMP_TIME_EXCEEDED:
if (code != ICMP_EXC_TTL)
return;
return 0;
break;
}
err = -ENOENT;
read_lock(&ipip6_lock);
t = ipip6_tunnel_lookup(iph->daddr, iph->saddr);
if (t == NULL || t->parms.iph.daddr == 0)
goto out;
err = 0;
if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED)
goto out;
@ -271,7 +276,7 @@ static void ipip6_err(struct sk_buff *skb, u32 info)
t->err_time = jiffies;
out:
read_unlock(&ipip6_lock);
return;
return err;
#else
struct iphdr *iph = (struct iphdr*)dp;
int hlen = iph->ihl<<2;
@ -332,7 +337,7 @@ out:
/* Prepare fake skb to feed it to icmpv6_send */
skb2 = skb_clone(skb, GFP_ATOMIC);
if (skb2 == NULL)
return;
return 0;
dst_release(skb2->dst);
skb2->dst = NULL;
skb_pull(skb2, skb->data - (u8*)iph6);
@ -355,7 +360,7 @@ out:
}
}
kfree_skb(skb2);
return;
return 0;
#endif
}
@ -791,9 +796,10 @@ static int __init ipip6_fb_tunnel_init(struct net_device *dev)
return 0;
}
static struct net_protocol sit_protocol = {
static struct xfrm_tunnel sit_handler = {
.handler = ipip6_rcv,
.err_handler = ipip6_err,
.priority = 1,
};
static void __exit sit_destroy_tunnels(void)
@ -812,7 +818,7 @@ static void __exit sit_destroy_tunnels(void)
static void __exit sit_cleanup(void)
{
inet_del_protocol(&sit_protocol, IPPROTO_IPV6);
xfrm4_tunnel_deregister(&sit_handler, AF_INET6);
rtnl_lock();
sit_destroy_tunnels();
@ -826,7 +832,7 @@ static int __init sit_init(void)
printk(KERN_INFO "IPv6 over IPv4 tunneling driver\n");
if (inet_add_protocol(&sit_protocol, IPPROTO_IPV6) < 0) {
if (xfrm4_tunnel_register(&sit_handler, AF_INET6) < 0) {
printk(KERN_INFO "sit init: Can't add protocol\n");
return -EAGAIN;
}
@ -848,7 +854,7 @@ static int __init sit_init(void)
err2:
free_netdev(ipip6_fb_tunnel_dev);
err1:
inet_del_protocol(&sit_protocol, IPPROTO_IPV6);
xfrm4_tunnel_deregister(&sit_handler, AF_INET6);
goto out;
}