[sr-dev] git:master:356ee3ad: sl: new pv $ltt(key) - return local generated to tag

Module: kamailio Branch: master Commit: 356ee3ad0c40d74fd95e5be1bfe3b311d7c7abeb URL: https://github.com/kamailio/kamailio/commit/356ee3ad0c40d74fd95e5be1bfe3b31… Author: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Committer: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Date: 2018-12-04T09:21:38+01:00 sl: new pv $ltt(key) - return local generated to tag - the to-tag used when kamailio sends a reply - $ltt(s) - the to-tag used in stateless replies - $ltt(t) - the to-tag used in transaction stateful replies (transaction has to be created at that time, eg., by t_newtran() or in a branch/failure route, otherwise it returns $null) - $ltt(x) - $ltt(t) if the transaction was created already, otherwise $ltt(s) --- Modified: src/modules/sl/sl.c --- Diff: https://github.com/kamailio/kamailio/commit/356ee3ad0c40d74fd95e5be1bfe3b31… Patch: https://github.com/kamailio/kamailio/commit/356ee3ad0c40d74fd95e5be1bfe3b31… --- diff --git a/src/modules/sl/sl.c b/src/modules/sl/sl.c index 96c3fdfdf5..36c8a8eec7 100644 --- a/src/modules/sl/sl.c +++ b/src/modules/sl/sl.c @@ -78,6 +78,17 @@ static int child_init(int rank); static void mod_destroy(); static int fixup_sl_reply(void** param, int param_no); +static int pv_get_ltt(sip_msg_t *msg, pv_param_t *param, pv_value_t *res); +static int pv_parse_ltt_name(pv_spec_p sp, str *in); + + +static pv_export_t mod_pvs[] = { + { {"ltt", (sizeof("ltt")-1)}, PVT_OTHER, pv_get_ltt, 0, + pv_parse_ltt_name, 0, 0, 0 }, + + { {0, 0}, 0, 0, 0, 0, 0, 0, 0 } +}; + static cmd_export_t cmds[]={ {"sl_send_reply", w_sl_send_reply, 2, fixup_sl_reply, 0, REQUEST_ROUTE}, @@ -120,7 +131,7 @@ struct module_exports exports= { cmds, /* cmd (cfg function) exports */ params, /* param exports */ sl_rpc, /* RPC method exports */ - 0, /* pv exports */ + mod_pvs, /* pv exports */ 0, /* response handling function */ mod_init, /* module init function */ child_init, /* per-child init function */ @@ -485,6 +496,83 @@ static int w_sl_forward_reply2(sip_msg_t* msg, char* str1, char* str2) return w_sl_forward_reply(msg, &code, &reason); } +/** + * + */ +static int pv_get_ltt(sip_msg_t *msg, pv_param_t *param, pv_value_t *res) +{ + str ttag = STR_NULL; + tm_cell_t *t = NULL; + + if(msg==NULL) + return pv_get_null(msg, param, res); + + if(param==NULL) + return pv_get_null(msg, param, res); + + switch(param->pvn.u.isname.name.n) { + case 0: /* mixed */ + if(get_reply_totag(msg, &ttag)<0) { + return pv_get_null(msg, param, res); + } + return pv_get_strval(msg, param, res, &ttag); + case 1: /* stateless */ + if(sl_get_reply_totag(msg, &ttag)<0) { + return pv_get_null(msg, param, res); + } + return pv_get_strval(msg, param, res, &ttag); + case 2: /* transaction stateful */ + if(sl_bind_tm==0 || tmb.t_gett==0) { + return pv_get_null(msg, param, res); + } + + t = tmb.t_gett(); + if(t== NULL || t==T_UNDEFINED) { + return pv_get_null(msg, param, res); + } + if(tmb.t_get_reply_totag(msg, &ttag)<0) { + return pv_get_null(msg, param, res); + } + return pv_get_strval(msg, param, res, &ttag); + default: + return pv_get_null(msg, param, res); + } +} + +/** + * + */ +static int pv_parse_ltt_name(pv_spec_p sp, str *in) +{ + if(sp==NULL || in==NULL || in->len<=0) + return -1; + + switch(in->len) { + case 1: + if(strncmp(in->s, "x", 1)==0) { + sp->pvp.pvn.u.isname.name.n = 0; + } else if(strncmp(in->s, "s", 1)==0) { + sp->pvp.pvn.u.isname.name.n = 1; + } else if(strncmp(in->s, "t", 1)==0) { + sp->pvp.pvn.u.isname.name.n = 2; + } else { + goto error; + } + break; + default: + goto error; + } + sp->pvp.pvn.type = PV_NAME_INTSTR; + sp->pvp.pvn.u.isname.type = 0; + + return 0; + +error: + LM_ERR("unknown PV ltt key: %.*s\n", in->len, in->s); + return -1; +} + + /** * @brief bind functions to SL API structure */