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SubjectRe: [PATCH 2.6.13rc3] IPv6: Check interface bindings on IPv6 raw socket reception
Andrew McDonald wrote:
> Take account of whether a socket is bound to a particular device when
> selecting an IPv6 raw socket to receive a packet. Also perform this
> check when receiving IPv6 packets with router alert options.

I guess this one makes sense on top.

[IPV4/6]: Check if packet was actually delivered to a raw socket to decide whether to send an ICMP unreachable

Signed-off-by: Patrick McHardy <kaber@trash.net>

---
commit 0fc074eed6ad201d76392dcabbc156784570ea64
tree 913c87ad866f4abb23e9788c0170b81b564cfe7a
parent 36245c9aaddbed7e50d9600c8d1889ebee48a90f
author Patrick McHardy <kaber@trash.net> Sun, 24 Jul 2005 02:23:25 +0200
committer Patrick McHardy <kaber@trash.net> Sun, 24 Jul 2005 02:23:25 +0200
include/net/raw.h | 2 +-
include/net/rawv6.h | 2 +-
net/ipv4/ip_input.c | 4 ++--
net/ipv4/raw.c | 8 ++++++--
net/ipv6/ip6_input.c | 4 ++--
net/ipv6/raw.c | 8 ++++++--
6 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/include/net/raw.h b/include/net/raw.h
--- a/include/net/raw.h
+++ b/include/net/raw.h
@@ -37,6 +37,6 @@ extern struct sock *__raw_v4_lookup(stru
unsigned long raddr, unsigned long laddr,
int dif);

-extern void raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash);
+extern int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash);

#endif /* _RAW_H */
diff --git a/include/net/rawv6.h b/include/net/rawv6.h
--- a/include/net/rawv6.h
+++ b/include/net/rawv6.h
@@ -7,7 +7,7 @@
extern struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
extern rwlock_t raw_v6_lock;

-extern void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr);
+extern int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr);

extern struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -225,8 +225,8 @@ static inline int ip_local_deliver_finis
/* If there maybe a raw socket we must check - if not we
* don't care less
*/
- if (raw_sk)
- raw_v4_input(skb, skb->nh.iph, hash);
+ if (raw_sk && !raw_v4_input(skb, skb->nh.iph, hash))
+ raw_sk = NULL;

if ((ipprot = rcu_dereference(inet_protos[hash])) != NULL) {
int ret;
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -150,10 +150,11 @@ static __inline__ int icmp_filter(struct
* RFC 1122: SHOULD pass TOS value up to the transport layer.
* -> It does. And not only TOS, but all IP header.
*/
-void raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
+int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
{
struct sock *sk;
struct hlist_head *head;
+ int delivered = 0;

read_lock(&raw_v4_lock);
head = &raw_v4_htable[hash];
@@ -168,8 +169,10 @@ void raw_v4_input(struct sk_buff *skb, s
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);

/* Not releasing hash table! */
- if (clone)
+ if (clone) {
raw_rcv(sk, clone);
+ delivered = 1;
+ }
}
sk = __raw_v4_lookup(sk_next(sk), iph->protocol,
iph->saddr, iph->daddr,
@@ -177,6 +180,7 @@ void raw_v4_input(struct sk_buff *skb, s
}
out:
read_unlock(&raw_v4_lock);
+ return delivered;
}

void raw_err (struct sock *sk, struct sk_buff *skb, u32 info)
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -166,8 +166,8 @@ resubmit:
nexthdr = skb->nh.raw[nhoff];

raw_sk = sk_head(&raw_v6_htable[nexthdr & (MAX_INET_PROTOS - 1)]);
- if (raw_sk)
- ipv6_raw_deliver(skb, nexthdr);
+ if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
+ raw_sk = NULL;

hash = nexthdr & (MAX_INET_PROTOS - 1);
if ((ipprot = rcu_dereference(inet6_protos[hash])) != NULL) {
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -141,11 +141,12 @@ static __inline__ int icmpv6_filter(stru
*
* Caller owns SKB so we must make clones.
*/
-void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
+int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
{
struct in6_addr *saddr;
struct in6_addr *daddr;
struct sock *sk;
+ int delivered = 0;
__u8 hash;

saddr = &skb->nh.ipv6h->saddr;
@@ -171,14 +172,17 @@ void ipv6_raw_deliver(struct sk_buff *sk
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);

/* Not releasing hash table! */
- if (clone)
+ if (clone) {
rawv6_rcv(sk, clone);
+ delivered = 1;
+ }
}
sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
skb->dev->ifindex);
}
out:
read_unlock(&raw_v6_lock);
+ return delivered;
}

/* This cleans up af_inet6 a bit. -DaveM */
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