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[SCTP]: Fix up sctp_rcv return value 

I was working on the ipip/xfrm problem and as usual I get side-tracked by
other problems.

As part of an attempt to change the IPv4 protocol handler calling
convention I found that SCTP violated the existing convention.

It's returning non-zero values after freeing the skb.  This is doubly bad
as 1) the skb gets resubmitted; 2) the return value is interpreted as a
protocol number.

This patch changes those return values to zero.

IPv6 doesn't suffer from this problem because it uses a positive return
value as an indication for resubmission.  So the only effect of this patch
there is to increment the IPSTATS_MIB_INDELIVERS counter which IMHO is
the right thing to do.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2006-03-25 01:25:29 -08:00 committed by David S. Miller
parent 9f514950bb
commit 2babf9daae
1 changed files with 4 additions and 8 deletions
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12
net/sctp/input.c
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@ -127,7 +127,6 @@ int sctp_rcv(struct sk_buff *skb)
union sctp_addr dest;
int family;
struct sctp_af *af;
int ret = 0;
if (skb->pkt_type!=PACKET_HOST)
goto discard_it;
@ -227,16 +226,13 @@ int sctp_rcv(struct sk_buff *skb)
goto discard_release;
nf_reset(skb);
ret = sk_filter(sk, skb, 1);
if (ret)
if (sk_filter(sk, skb, 1))
goto discard_release;
/* Create an SCTP packet structure. */
chunk = sctp_chunkify(skb, asoc, sk);
if (!chunk) {
ret = -ENOMEM;
if (!chunk)
goto discard_release;
}
SCTP_INPUT_CB(skb)->chunk = chunk;
/* Remember what endpoint is to handle this packet. */
@ -277,11 +273,11 @@ int sctp_rcv(struct sk_buff *skb)
sctp_bh_unlock_sock(sk);
sock_put(sk);
return ret;
return 0;
discard_it:
kfree_skb(skb);
return ret;
return 0;
discard_release:
/* Release any structures we may be holding. */