Module: kamailio Branch: master Commit: c321f28ff657c921b8de2b84e66908f281d35d78 URL: https://github.com/kamailio/kamailio/commit/c321f28ff657c921b8de2b84e66908f2...

Author: Daniel-Constantin Mierla miconda@gmail.com Committer: Daniel-Constantin Mierla miconda@gmail.com Date: 2023-03-31T18:24:24+02:00

tm: use header attribute shortcuts to match inside t_lookup_callid()

---

Modified: src/modules/tm/t_lookup.c

---

Diff: https://github.com/kamailio/kamailio/commit/c321f28ff657c921b8de2b84e66908f2... Patch: https://github.com/kamailio/kamailio/commit/c321f28ff657c921b8de2b84e66908f2...

---

diff --git a/src/modules/tm/t_lookup.c b/src/modules/tm/t_lookup.c index 696dfacd0a..70574eb323 100644 --- a/src/modules/tm/t_lookup.c +++ b/src/modules/tm/t_lookup.c @@ -2163,14 +2163,14 @@ int t_is_local(struct sip_msg* p_msg) return is_local(t); }

-/** lookup a transaction based on callid and cseq. +/** lookup an invite transaction based on callid and cseq. * The parameters are pure header field content only, - * e.g. "123@10.0.0.1" and "11" + * e.g. callid: "123@10.0.0.1" and cseq: "11" * @param trans - double pointer to the transaction, filled with a pointer * to the found transaction on success and with 0 if the * transaction was not found. * @param callid - callid for the searched transaction. - * @param cseq - cseq for the searched transaction. + * @param cseq - cseq number for the searched transaction. * @return -1 on error/not found, 1 if found. * Side-effects: sets T and T_branch (T_branch always to T_BR_UNDEFINED). */ @@ -2179,20 +2179,6 @@ int t_lookup_callid(struct cell ** trans, str callid, str cseq) { unsigned hash_index; struct entry* hash_bucket;

- /* I use MAX_HEADER, not sure if this is a good choice... */ - char callid_header[MAX_HEADER]; - char cseq_header[MAX_HEADER]; - /* save return value of print_* functions here */ - char* endpos; - - /* need method, which is always INVITE in our case */ - /* CANCEL is only useful after INVITE */ - str invite_method; - char* invite_string = INVITE; - - invite_method.s = invite_string; - invite_method.len = INVITE_LEN; - /* lookup the hash index where the transaction is stored */ hash_index=hash(callid, cseq);

@@ -2201,15 +2187,6 @@ int t_lookup_callid(struct cell ** trans, str callid, str cseq) { return -1; }

- /* create header fields the same way tm does itself, then compare headers */ - endpos = print_callid_mini(callid_header, callid); - LM_DBG("created comparable call_id header field: >%.*s<\n", - (int)(endpos - callid_header), callid_header); - - endpos = print_cseq_mini(cseq_header, &cseq, &invite_method); - LM_DBG("created comparable cseq header field: >%.*s<\n", - (int)(endpos - cseq_header), cseq_header); - LOCK_HASH(hash_index); LM_DBG("just locked hash index %u, looking for transactions there:\n", hash_index); @@ -2219,10 +2196,19 @@ int t_lookup_callid(struct cell ** trans, str callid, str cseq) { clist_foreach(hash_bucket, p_cell, next_c){

prefetch_loc_r(p_cell->next_c, 1); + + if(p_cell->callid_val.s==NULL || p_cell->cseq_num.s==NULL + || p_cell->cseq_met.s==NULL) { + LM_CRIT("null shortcuts for matching attributes - t:%p cid:%p csn:%p csm:%p\n", + p_cell, p_cell->callid_val.s, p_cell->cseq_num.s, p_cell->cseq_met.s); + continue; + } /* compare complete header fields, casecmp to make sure invite=INVITE*/ - if ((strncmp(callid_header, p_cell->callid_hdr.s, p_cell->callid_hdr.len) == 0) - && (strncasecmp(cseq_header, p_cell->cseq_hdr_n.s, p_cell->cseq_hdr_n.len) - == 0)) { + if((callid.len==p_cell->callid_val.len) && (cseq.len==p_cell->cseq_num.len) + && (INVITE_LEN==p_cell->cseq_met.len) + && (strncmp(callid.s, p_cell->callid_val.s, callid.len)==0) + && (strncmp(cseq.s, p_cell->cseq_num.s, cseq.len)==0) + && (strncasecmp(INVITE, p_cell->cseq_met.s, INVITE_LEN)==0)) { LM_DBG("we have a match: callid=>>%.*s<< cseq=>>%.*s<<\n", p_cell->callid_hdr.len, p_cell->callid_hdr.s, p_cell->cseq_hdr_n.len, p_cell->cseq_hdr_n.s);