From mboxrd@z Thu Jan 1 00:00:00 1970 From: pablo@netfilter.org Subject: [PATCH 7/8] ipvs: SIP fragment handling Date: Fri, 26 Oct 2012 11:24:37 +0200 Message-ID: <1351243478-4852-8-git-send-email-pablo@netfilter.org> References: <1351243478-4852-1-git-send-email-pablo@netfilter.org> Cc: davem@davemloft.net, netdev@vger.kernel.org To: netfilter-devel@vger.kernel.org Return-path: Received: from mail.us.es ([193.147.175.20]:59634 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756358Ab2JZJY6 (ORCPT ); Fri, 26 Oct 2012 05:24:58 -0400 In-Reply-To: <1351243478-4852-1-git-send-email-pablo@netfilter.org> Sender: netfilter-devel-owner@vger.kernel.org List-ID: From: Jesper Dangaard Brouer 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 Acked-by: Julian Anastasov [ horms@verge.net.au: Fix comment style ] Signed-off-by: Simon Horman --- net/netfilter/ipvs/ip_vs_pe_sip.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/net/netfilter/ipvs/ip_vs_pe_sip.c b/net/netfilter/ipvs/ip_vs_pe_sip.c index ee4e2e3..12475ef 100644 --- a/net/netfilter/ipvs/ip_vs_pe_sip.c +++ b/net/netfilter/ipvs/ip_vs_pe_sip.c @@ -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; -- 1.7.10.4