netfilter: nf_conntrack_sip: fix ct_sip_parse_request() REGISTER request parsing
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>
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@ -236,12 +236,13 @@ int ct_sip_parse_request(const struct nf_conn *ct,
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return 0;
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/* Find SIP URI */
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limit -= strlen("sip:");
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for (; dptr < limit; dptr++) {
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for (; dptr < limit - strlen("sip:"); dptr++) {
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if (*dptr == '\r' || *dptr == '\n')
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return -1;
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if (strnicmp(dptr, "sip:", strlen("sip:")) == 0)
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if (strnicmp(dptr, "sip:", strlen("sip:")) == 0) {
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dptr += strlen("sip:");
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break;
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}
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}
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if (!skp_epaddr_len(ct, dptr, limit, &shift))
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return 0;
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