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ipv6: Add redirect support to all protocol icmp error handlers. 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-07-12 00:25:15 -07:00
parent 3a5ad2ee5e
commit ec18d9a269
13 changed files with 69 additions and 14 deletions
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2
include/net/sctp/sctp.h
View File

@ -162,6 +162,8 @@ struct sock *sctp_err_lookup(int family, struct sk_buff *,
void sctp_err_finish(struct sock *, struct sctp_association *);
void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
struct sctp_transport *t, __u32 pmtu);
void sctp_icmp_redirect(struct sock *, struct sctp_transport *,
struct sk_buff *);
void sctp_icmp_proto_unreachable(struct sock *sk,
struct sctp_association *asoc,
struct sctp_transport *t);

7
net/dccp/ipv6.c
View File

@ -130,6 +130,13 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
np = inet6_sk(sk);
if (type == NDISC_REDIRECT) {
struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie);
if (dst && dst->ops->redirect)
dst->ops->redirect(dst, skb);
}
if (type == ICMPV6_PKT_TOOBIG) {
struct dst_entry *dst = NULL;

10
net/ipv6/ah6.c
View File

@ -613,16 +613,18 @@ static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
struct xfrm_state *x;
if (type != ICMPV6_DEST_UNREACH &&
type != ICMPV6_PKT_TOOBIG)
type != ICMPV6_PKT_TOOBIG &&
type != NDISC_REDIRECT)
return;
x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET6);
if (!x)
return;
NETDEBUG(KERN_DEBUG "pmtu discovery on SA AH/%08x/%pI6\n",
ntohl(ah->spi), &iph->daddr);
ip6_update_pmtu(skb, net, info, 0, 0);
if (type == NDISC_REDIRECT)
ip6_redirect(skb, net, 0, 0);
else
ip6_update_pmtu(skb, net, info, 0, 0);
xfrm_state_put(x);
}

11
net/ipv6/esp6.c
View File

@ -434,16 +434,19 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
struct xfrm_state *x;
if (type != ICMPV6_DEST_UNREACH &&
type != ICMPV6_PKT_TOOBIG)
type != ICMPV6_PKT_TOOBIG &&
type != NDISC_REDIRECT)
return;
x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
esph->spi, IPPROTO_ESP, AF_INET6);
if (!x)
return;
pr_debug("pmtu discovery on SA ESP/%08x/%pI6\n",
ntohl(esph->spi), &iph->daddr);
ip6_update_pmtu(skb, net, info, 0, 0);
if (type == NDISC_REDIRECT)
ip6_redirect(skb, net, 0, 0);
else
ip6_update_pmtu(skb, net, info, 0, 0);
xfrm_state_put(x);
}

7
net/ipv6/ip6_tunnel.c
View File

@ -550,6 +550,9 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
rel_type = ICMP_DEST_UNREACH;
rel_code = ICMP_FRAG_NEEDED;
break;
case NDISC_REDIRECT:
rel_type = ICMP_REDIRECT;
rel_code = ICMP_REDIR_HOST;
default:
return 0;
}
@ -608,6 +611,10 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), rel_info);
}
if (rel_type == ICMP_REDIRECT) {
if (skb_dst(skb2)->ops->redirect)
skb_dst(skb2)->ops->redirect(skb_dst(skb2), skb2);
}
icmp_send(skb2, rel_type, rel_code, htonl(rel_info));

11
net/ipv6/ipcomp6.c
View File

@ -64,7 +64,9 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
(struct ip_comp_hdr *)(skb->data + offset);
struct xfrm_state *x;
if (type != ICMPV6_DEST_UNREACH && type != ICMPV6_PKT_TOOBIG)
if (type != ICMPV6_DEST_UNREACH &&
type != ICMPV6_PKT_TOOBIG &&
type != NDISC_REDIRECT)
return;
spi = htonl(ntohs(ipcomph->cpi));
@ -73,9 +75,10 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
if (!x)
return;
pr_debug("pmtu discovery on SA IPCOMP/%08x/%pI6\n",
spi, &iph->daddr);
ip6_update_pmtu(skb, net, info, 0, 0);
if (type == NDISC_REDIRECT)
ip6_redirect(skb, net, 0, 0);
else
ip6_update_pmtu(skb, net, info, 0, 0);
xfrm_state_put(x);
}

2
net/ipv6/raw.c
View File

@ -332,6 +332,8 @@ static void rawv6_err(struct sock *sk, struct sk_buff *skb,
ip6_sk_update_pmtu(skb, sk, info);
harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
}
if (type == NDISC_REDIRECT)
ip6_sk_redirect(skb, sk);
if (np->recverr) {
u8 *payload = skb->data;
if (!inet->hdrincl)

8
net/ipv6/sit.c
View File

@ -539,6 +539,8 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
if (code != ICMP_EXC_TTL)
return 0;
break;
case ICMP_REDIRECT:
break;
}
err = -ENOENT;
@ -557,6 +559,12 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
err = 0;
goto out;
}
if (type == ICMP_REDIRECT) {
ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0,
IPPROTO_IPV6, 0);
err = 0;
goto out;
}
if (t->parms.iph.daddr == 0)
goto out;

7
net/ipv6/tcp_ipv6.c
View File

@ -363,6 +363,13 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
np = inet6_sk(sk);
if (type == NDISC_REDIRECT) {
struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie);
if (dst && dst->ops->redirect)
dst->ops->redirect(dst,skb);
}
if (type == ICMPV6_PKT_TOOBIG) {
struct dst_entry *dst;

2
net/ipv6/udp.c
View File

@ -483,6 +483,8 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
if (type == ICMPV6_PKT_TOOBIG)
ip6_sk_update_pmtu(skb, sk, info);
if (type == NDISC_REDIRECT)
ip6_sk_redirect(skb, sk);
np = inet6_sk(sk);

9
net/ipv6/xfrm6_policy.c
View File

@ -215,6 +215,14 @@ static void xfrm6_update_pmtu(struct dst_entry *dst, u32 mtu)
path->ops->update_pmtu(path, mtu);
}
static void xfrm6_redirect(struct dst_entry *dst, struct sk_buff *skb)
{
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
struct dst_entry *path = xdst->route;
path->ops->redirect(path, skb);
}
static void xfrm6_dst_destroy(struct dst_entry *dst)
{
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
@ -261,6 +269,7 @@ static struct dst_ops xfrm6_dst_ops = {
.protocol = cpu_to_be16(ETH_P_IPV6),
.gc = xfrm6_garbage_collect,
.update_pmtu = xfrm6_update_pmtu,
.redirect = xfrm6_redirect,
.cow_metrics = dst_cow_metrics_generic,
.destroy = xfrm6_dst_destroy,
.ifdown = xfrm6_dst_ifdown,

4
net/sctp/input.c
View File

@ -423,8 +423,8 @@ void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
}
static void sctp_icmp_redirect(struct sock *sk, struct sctp_transport *t,
struct sk_buff *skb)
void sctp_icmp_redirect(struct sock *sk, struct sctp_transport *t,
struct sk_buff *skb)
{
struct dst_entry *dst;

3
net/sctp/ipv6.c
View File

@ -185,6 +185,9 @@ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
goto out_unlock;
}
break;
case NDISC_REDIRECT:
sctp_icmp_redirect(sk, transport, skb);
break;
default:
break;
}