Module: kamailio Branch: master Commit: a9ede56b35990fcc9164af0775f503e49e33377e URL: https://github.com/kamailio/kamailio/commit/a9ede56b35990fcc9164af0775f503e4...

Author: Daniel-Constantin Mierla miconda@gmail.com Committer: Daniel-Constantin Mierla miconda@gmail.com Date: 2020-10-09T21:55:45+02:00

sanity: extended check 4 (required headers) for uniqueness

- Call-ID, CSeq, From and To have to be only once

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Modified: src/modules/sanity/sanity.c

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Diff: https://github.com/kamailio/kamailio/commit/a9ede56b35990fcc9164af0775f503e4... Patch: https://github.com/kamailio/kamailio/commit/a9ede56b35990fcc9164af0775f503e4...

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diff --git a/src/modules/sanity/sanity.c b/src/modules/sanity/sanity.c index 04ad2b86d6..842d394194 100644 --- a/src/modules/sanity/sanity.c +++ b/src/modules/sanity/sanity.c @@ -299,8 +299,21 @@ int check_ruri_scheme(sip_msg_t* msg) { return SANITY_CHECK_PASSED; }

+#define SANITY_HDR_DUPCHECK(_hf, _hdr_flags, _hdr_type, _hdr_flag, _hdr_name) \ + do { \ + if((_hf)->type == _hdr_type) { \ + if(_hdr_flags & _hdr_flag) { \ + LM_DBG("duplicated %s header\n", _hdr_name); \ + return SANITY_CHECK_FAILED; \ + } \ + _hdr_flags |= _hdr_flag; \ + } \ + } while(0) + /* check for the presence of the minimal required headers */ int check_required_headers(sip_msg_t* msg) { + hdr_field_t* hf; + hdr_flags_t hdr_flags = 0;

LM_DBG("check_required_headers entered\n");

@@ -309,6 +322,20 @@ int check_required_headers(sip_msg_t* msg) { LM_DBG("check_required_headers failed\n"); return SANITY_CHECK_FAILED; } + if (parse_headers(msg, HDR_EOH_F, 0) != 0) { + LM_ERR("failed to parse headers\n"); + if (sanity_reply(msg, 400, "Bad Headers") < 0) { + LM_WARN("failed to send 400 reply\n"); + } + return SANITY_CHECK_FAILED; + } + for (hf=msg->headers; hf; hf=hf->next) { + SANITY_HDR_DUPCHECK(hf, hdr_flags, HDR_FROM_T, HDR_FROM_F, "From"); + SANITY_HDR_DUPCHECK(hf, hdr_flags, HDR_TO_T, HDR_TO_F, "To"); + SANITY_HDR_DUPCHECK(hf, hdr_flags, HDR_CALLID_T, HDR_CALLID_F, "Call-Id"); + SANITY_HDR_DUPCHECK(hf, hdr_flags, HDR_CSEQ_T, HDR_CSEQ_F, "CSeq"); + } + /* TODO: check for other required headers according to request type */ LM_DBG("check_required_headers passed\n");