/*! * \brief Update the saved Contact information in dialog from SIP message * \param dlg updated dialog * \param req SIP request * \param dir direction of request, must DLG_DIR_UPSTREAM or DLG_DIR_DOWNSTREAM * \return 0 on success, -1 on failure */ static inline int dlg_refresh_contacts(struct dlg_cell *dlg, struct sip_msg *req, unsigned int dir) { str contact; if(req->first_line.type == SIP_REPLY) return 0; if(req->first_line.u.request.method_value != METHOD_INVITE) return 0; /* extract the contact address */ if (!req->contact&&(parse_headers(req,HDR_CONTACT_F,0)<0||!req->contact)){ LM_ERR("bad sip message or missing Contact hdr\n"); return -1; } if ( parse_contact(req->contact)<0 || ((contact_body_t *)req->contact->parsed)->contacts==NULL || ((contact_body_t *)req->contact->parsed)->contacts->next!=NULL ) { LM_ERR("bad Contact HDR\n"); return -1; } contact = ((contact_body_t *)req->contact->parsed)->contacts->uri; if ( dir==DLG_DIR_UPSTREAM) { return dlg_update_contact(dlg, DLG_CALLEE_LEG, &contact); } else if ( dir==DLG_DIR_DOWNSTREAM) { return dlg_update_contact(dlg, DLG_CALLER_LEG, &contact); } else { LM_CRIT("dir is not set!\n"); return -1; } }
/*! * \brief Function that is registered as TM callback and called on replies * * Function that is registered as TM callback and called on replies. It * parses the reply and set the appropriate event. This is then used to * update the dialog state, run eventual dialog callbacks and save or * update the necessary informations about the dialog. * \see next_state_dlg * \param t transaction, unused * \param type type of the entered callback * \param param saved dialog structure in the callback */ static void dlg_onreply(struct cell* t, int type, struct tmcb_params *param) { struct dlg_cell *dlg; struct dlg_cell_out *dlg_out = 0; int new_state, old_state, unref, event; str to_tag, to_uri; struct sip_msg *req = param->req; struct sip_msg *rpl = param->rpl; struct dlg_entry_out* dlg_entry_out = 0; if (t && t->fwded_totags) LM_DBG("ONREPLY CALL_BACK from TM received and type is [%i] and TO is [%.*s]\n", type, t->fwded_totags->tag.len, t->fwded_totags->tag.s); else LM_DBG("ONREPLY CALL_BACK from TM received and type is [%i]\n", type); dlg = (struct dlg_cell *) (*param->param); if (shutdown_done || dlg == 0) return; if (t) { dlg->transaction = t; } LM_DBG("DLG dialogid is entry:id [%i:%i]\n", dlg->h_entry, dlg->h_id); if (type == TMCB_RESPONSE_FWDED) { // The state does not change, but the msg is mutable in this callback LM_DBG("TMCB_RESPONSE_FWDED from TM received"); run_dlg_callbacks(DLGCB_RESPONSE_FWDED, dlg, req, rpl, DLG_DIR_UPSTREAM, 0); return; } if (type == TMCB_RESPONSE_OUT) { LM_DBG("TMCB_RESPONSE_OUT\n"); return; } if (type == TMCB_RESPONSE_READY) { if (rpl == FAKED_REPLY) { LM_DBG("Faked reply\n"); return; } // get to tag LM_DBG("Extracting to-tag from reply"); if (!rpl->to && ((parse_headers(rpl, HDR_TO_F, 0) < 0) || !rpl->to)) { LM_ERR("bad reply or missing TO hdr :-/\n"); to_tag.s = 0; to_tag.len = 0; } else { //populate to uri for this branch. to_uri = get_to(rpl)->uri; to_tag = get_to(rpl)->tag_value; if (to_tag.s == 0 || to_tag.len == 0) { LM_ERR("missing TAG param in TO hdr :-/\n"); to_tag.s = 0; to_tag.len = 0; //Here we assume that the transaction module timer will remove any early dialogs return; } } LM_DBG("Got to-tag from response: %.*s \n", to_tag.len, to_tag.s); } if (type == TMCB_DESTROY) event = DLG_EVENT_TDEL; else if (param->code < 200) event = DLG_EVENT_RPL1xx; else if (param->code < 300) event = DLG_EVENT_RPL2xx; else event = DLG_EVENT_RPL3xx; LM_DBG("Calling next_state_dlg and event is %i\n", event); next_state_dlg(dlg, event, &old_state, &new_state, &unref, &to_tag); if (type == TMCB_RESPONSE_READY) { LM_DBG("Checking if there is an existing dialog_out entry with same to-tag"); dlg_entry_out = &dlg->dlg_entry_out; lock_get(dlg->dlg_out_entries_lock); dlg_out = dlg_entry_out->first; LM_DBG("Scanning dlg_entry_out list for dlg_out"); while (dlg_out) { //Check if there is an already dialog_out entry with same To-tag if (dlg_out->to_tag.len == to_tag.len && memcmp(dlg_out->to_tag.s, to_tag.s, dlg_out->to_tag.len) == 0) { //Found a dialog_out entry with same to_tag! LM_DBG("Found dlg_out for to-tag: %.*s\n", dlg_out->to_tag.len, dlg_out->to_tag.s); break; } dlg_out = dlg_out->next; } lock_release(dlg->dlg_out_entries_lock); if (!dlg_out) { LM_DBG("No dlg_out entry found - creating a new dialog_out entry on dialog [%p]\n", dlg); dlg_out = build_new_dlg_out(dlg, &to_uri, &to_tag); link_dlg_out(dlg, dlg_out, 0); /* save callee's cseq, caller cseq, callee contact and callee record route*/ if (populate_leg_info(dlg, rpl, t, DLG_CALLEE_LEG, &to_tag) != 0) { LM_ERR("could not add further info to the dlg out\n"); } if (!dlg_out) { LM_ERR("failed to create new dialog out structure\n"); //TODO do something on this error! } } else { //This dlg_out already exists, update cseq and contact if present LM_DBG("dlg_out entry found - updating cseq's for dialog out [%p] for to-tag [%.*s] \n", dlg_out, dlg_out->to_tag.len, dlg_out->to_tag.s); if ((!rpl->cseq && parse_headers(rpl, HDR_CSEQ_F, 0) < 0) || !rpl->cseq || !rpl->cseq->parsed) { LM_ERR("bad sip message or missing CSeq hdr :-/\n"); } dlg_update_cseq(dlg, DLG_CALLEE_LEG, &((get_cseq(rpl))->number), &(dlg_out->to_tag)); /* extract the contact address to update if present*/ if (!rpl->contact && (parse_headers(rpl, HDR_CONTACT_F, 0) < 0 || !rpl->contact)) { LM_ERR("Can not update callee contact: bad sip message or missing Contact hdr\n"); } else if (parse_contact(rpl->contact) < 0 || ((contact_body_t *) rpl->contact->parsed)->contacts == NULL || ((contact_body_t *) rpl->contact->parsed)->contacts->next != NULL) { LM_ERR("Can not update callee contact: bad Contact HDR\n"); } else { str contact; contact = ((contact_body_t *) rpl->contact->parsed)->contacts->uri; dlg_update_contact(dlg, DLG_CALLEE_LEG, &contact, &(dlg_out->to_tag)); } } } if (new_state == DLG_STATE_EARLY) { run_dlg_callbacks(DLGCB_EARLY, dlg, req, rpl, DLG_DIR_UPSTREAM, 0); return; } LM_DBG("new state is %i and old state is %i\n", new_state, old_state); if ((new_state == DLG_STATE_CONFIRMED) && (event == DLG_EVENT_RPL2xx)) { LM_DBG("dialog %p confirmed \n", dlg); //Remove all the other entries in dialog_out for the same dialog after TM expires the transaction //(not before in order to absorb late in-early-dialog requests). //remove all other dlg_out objects if (dlg_out) { if (d_tmb.register_tmcb(req, NULL, TMCB_DESTROY, unlink_dlgouts_from_cb, (void*) dlg, NULL) < 0) { LM_ERR("failed to register deletion delay function\n"); LM_DBG("Removing all other DLGs"); dlg_remove_dlg_out(dlg_out, dlg, 0); } else { //mark the outs for deletion dlg_remove_dlg_out(dlg_out, dlg, 1); } } else { LM_ERR("There is no dlg_out structure - this is bad\n"); //TODO: add error handling here } /* set start time */ dlg->start_ts = (unsigned int) (time(0)); /* save the settings to the database, * if realtime saving mode configured- save dialog now * else: the next time the timer will fire the update*/ dlg->dflags |= DLG_FLAG_NEW; if (0 != insert_dlg_timer(&dlg->tl, dlg->lifetime)) { LM_CRIT("Unable to insert dlg %p [%u:%u] on event %d [%d->%d] " "with clid '%.*s' and tags '%.*s' \n", dlg, dlg->h_entry, dlg->h_id, event, old_state, new_state, dlg->callid.len, dlg->callid.s, dlg->from_tag.len, dlg->from_tag.s); } else { ref_dlg(dlg, 1); } run_dlg_callbacks(DLGCB_CONFIRMED, dlg, req, rpl, DLG_DIR_UPSTREAM, 0); if (unref) unref_dlg(dlg, unref); return; } if (new_state == DLG_STATE_CONCURRENTLY_CONFIRMED && (old_state == DLG_STATE_CONFIRMED || old_state == DLG_STATE_CONCURRENTLY_CONFIRMED)) { //This is a concurrently confirmed call LM_DBG("This is a concurrently confirmed call."); //Create a new Dialog ID token “X” //Not sure how to do this so just going to use existing Did and add an X character to it str new_did; create_concurrent_did(dlg, &new_did); //assign new did to the created or updated dialog_out entry. update_dlg_out_did(dlg_out, &new_did); //Then, duplicate the dialog_in entry and set its Dialog ID value to new_did //for now rather just create new dlg structure with the correct params - this should be fixed if future use requires struct dlg_cell *new_dlg = 0; new_dlg = build_new_dlg(&(dlg->callid) /*callid*/, &(dlg->from_uri) /*from uri*/, &(dlg->from_tag)/*from_tag*/, &(dlg->req_uri) /*r-uri*/); //assign new did to dlg_in update_dlg_did(new_dlg, &new_did); if (new_dlg == 0) { LM_ERR("failed to create new dialog\n"); return; } //link the new_dlg with dlg_out object link_dlg_out(new_dlg, dlg_out, 0); } if (old_state != DLG_STATE_DELETED && new_state == DLG_STATE_DELETED) { LM_DBG("dialog %p failed (negative reply)\n", dlg); /* dialog setup not completed (3456XX) */ run_dlg_callbacks(DLGCB_FAILED, dlg, req, rpl, DLG_DIR_UPSTREAM, 0); /* do unref */ if (unref) unref_dlg(dlg, unref); return; } if (unref) unref_dlg(dlg, unref); return; }