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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>
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1 changed files with 12 additions and 4 deletions
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@ -68,6 +68,7 @@ static int get_callid(const char *dptr, unsigned int dataoff,
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static int
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ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb)
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{
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struct sk_buff *reasm = skb_nfct_reasm(skb);
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struct ip_vs_iphdr iph;
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unsigned int dataoff, datalen, matchoff, matchlen;
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const char *dptr;
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@ -78,13 +79,20 @@ ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb)
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/* Only useful with UDP */
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if (iph.protocol != IPPROTO_UDP)
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return -EINVAL;
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/* todo: IPv6 fragments:
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* I think this only should be done for the first fragment. /HS
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*/
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if (reasm) {
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skb = reasm;
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dataoff = iph.thoff_reasm + sizeof(struct udphdr);
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} else
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dataoff = iph.len + sizeof(struct udphdr);
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/* No Data ? */
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dataoff = iph.len + sizeof(struct udphdr);
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if (dataoff >= skb->len)
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return -EINVAL;
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if ((retc=skb_linearize(skb)) < 0)
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/* todo: Check if this will mess-up the reasm skb !!! /HS */
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retc = skb_linearize(skb);
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if (retc < 0)
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return retc;
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dptr = skb->data + dataoff;
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datalen = skb->len - dataoff;
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