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ipvs: SIP fragment handling 

Use the nfct_reasm SKB if available.

Based on part of a patch from: Hans Schillstrom
I have left Hans'es comment in the patch (marked /HS)

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
[ horms@verge.net.au: Fix comment style ]
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Jesper Dangaard Brouer 2012-09-26 14:07:33 +02:00 committed by Simon Horman
parent d4383f04d1
commit 92eec78d25
1 changed files with 12 additions and 4 deletions
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16
net/netfilter/ipvs/ip_vs_pe_sip.c
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@ -68,6 +68,7 @@ static int get_callid(const char *dptr, unsigned int dataoff,
static int
ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb)
{
struct sk_buff *reasm = skb_nfct_reasm(skb);
struct ip_vs_iphdr iph;
unsigned int dataoff, datalen, matchoff, matchlen;
const char *dptr;
@ -78,13 +79,20 @@ ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb)
/* Only useful with UDP */
if (iph.protocol != IPPROTO_UDP)
return -EINVAL;
/* todo: IPv6 fragments:
* I think this only should be done for the first fragment. /HS
*/
if (reasm) {
skb = reasm;
dataoff = iph.thoff_reasm + sizeof(struct udphdr);
} else
dataoff = iph.len + sizeof(struct udphdr);
/* No Data ? */
dataoff = iph.len + sizeof(struct udphdr);
if (dataoff >= skb->len)
return -EINVAL;
if ((retc=skb_linearize(skb)) < 0)
/* todo: Check if this will mess-up the reasm skb !!! /HS */
retc = skb_linearize(skb);
if (retc < 0)
return retc;
dptr = skb->data + dataoff;
datalen = skb->len - dataoff;