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[NETFILTER]: nf_conntrack_sip: perform NAT after parsing

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Perform NAT last after parsing the packet. This makes no difference
currently, but is needed when dealing with registrations to make
sure we seen the unNATed addresses.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-03-25 20:22:37 -07:00 committed by David S. Miller
parent 30f33e6dee
commit 33cb1e9a93
2 changed files with 11 additions and 11 deletions
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3
net/ipv4/netfilter/nf_nat_sip.c
View File

@ -104,9 +104,6 @@ static unsigned int ip_nat_sip(struct sk_buff *skb,
union nf_inet_addr addr;
__be16 port;
if (*datalen < strlen("SIP/2.0"))
return NF_ACCEPT;
/* Basic rules: requests and responses. */
if (strnicmp(*dptr, "SIP/2.0", strlen("SIP/2.0")) != 0) {
if (ct_sip_parse_request(ct, *dptr, *datalen,

19
net/netfilter/nf_conntrack_sip.c
View File

@ -700,6 +700,7 @@ static int sip_help(struct sk_buff *skb,
{
unsigned int dataoff, datalen;
const char *dptr;
int ret;
typeof(nf_nat_sip_hook) nf_nat_sip;
/* No Data ? */
@ -716,20 +717,22 @@ static int sip_help(struct sk_buff *skb,
return NF_ACCEPT;
}
nf_nat_sip = rcu_dereference(nf_nat_sip_hook);
if (nf_nat_sip && ct->status & IPS_NAT_MASK) {
if (!nf_nat_sip(skb, &dptr, &datalen))
return NF_DROP;
}
datalen = skb->len - dataoff;
if (datalen < strlen("SIP/2.0 200"))
return NF_ACCEPT;
if (strnicmp(dptr, "SIP/2.0 ", strlen("SIP/2.0 ")) != 0)
return process_sip_request(skb, &dptr, &datalen);
ret = process_sip_request(skb, &dptr, &datalen);
else
return process_sip_response(skb, &dptr, &datalen);
ret = process_sip_response(skb, &dptr, &datalen);
if (ret == NF_ACCEPT && ct->status & IPS_NAT_MASK) {
nf_nat_sip = rcu_dereference(nf_nat_sip_hook);
if (nf_nat_sip && !nf_nat_sip(skb, &dptr, &datalen))
ret = NF_DROP;
}
return ret;
}
static struct nf_conntrack_helper sip[MAX_PORTS][2] __read_mostly;