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netfilter: nf_conntrack_sip: fix ct_sip_parse_request() REGISTER request parsing

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When requests are parsed, the "sip:" part of the SIP URI should be skipped.

Usually this doesn't matter because address parsing skips forward until after
the username part, but in case REGISTER requests it doesn't contain a username
and the address can not be parsed.

Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Patrick McHardy 2010-02-11 12:23:12 +01:00
parent b87921bdf2
commit 54101f4f3b
1 changed files with 4 additions and 3 deletions
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7
net/netfilter/nf_conntrack_sip.c
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@ -236,12 +236,13 @@ int ct_sip_parse_request(const struct nf_conn *ct,
return 0;
/* Find SIP URI */
limit -= strlen("sip:");
for (; dptr < limit; dptr++) {
for (; dptr < limit - strlen("sip:"); dptr++) {
if (*dptr == '\r' || *dptr == '\n')
return -1;
if (strnicmp(dptr, "sip:", strlen("sip:")) == 0)
if (strnicmp(dptr, "sip:", strlen("sip:")) == 0) {
dptr += strlen("sip:");
break;
}
}
if (!skp_epaddr_len(ct, dptr, limit, &shift))
return 0;