| /* $Id$ */ |
| /* |
| * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pjsip_simple/messaging.h> |
| #include <pjsip/sip_endpoint.h> |
| #include <pjsip/sip_parser.h> |
| #include <pjsip/sip_transaction.h> |
| #include <pjsip/sip_event.h> |
| #include <pjsip/sip_module.h> |
| #include <pjsip/sip_util.h> |
| #include <pj/string.h> |
| #include <pj/pool.h> |
| #include <pj/guid.h> |
| #include <pj/string.h> |
| #include <pj/log.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #define THIS_FILE "messaging" |
| |
| struct messaging_data |
| { |
| void *token; |
| pjsip_messaging_cb cb; |
| }; |
| |
| struct pjsip_messaging_session |
| { |
| pj_pool_t *pool; |
| pjsip_endpoint *endpt; |
| pjsip_from_hdr *from; |
| pjsip_to_hdr *to; |
| pjsip_cid_hdr *call_id; |
| pjsip_cseq_hdr *cseq; |
| }; |
| |
| static int module_id; |
| static pjsip_on_new_msg_cb incoming_cb; |
| static pjsip_method message_method; |
| |
| |
| /* |
| * Set global callback to receive incoming message. |
| */ |
| PJ_DEF(pjsip_on_new_msg_cb) |
| pjsip_messaging_set_incoming_callback(pjsip_on_new_msg_cb cb) |
| { |
| pjsip_on_new_msg_cb prev_cb = incoming_cb; |
| incoming_cb = cb; |
| return prev_cb; |
| } |
| |
| |
| /* |
| * Create an independent message (ie. not associated with a session). |
| */ |
| PJ_DEF(pjsip_tx_data*) |
| pjsip_messaging_create_msg_from_hdr(pjsip_endpoint *endpt, |
| const pjsip_uri *target, |
| const pjsip_from_hdr *param_from, |
| const pjsip_to_hdr *param_to, |
| const pjsip_cid_hdr *param_call_id, |
| int param_cseq, |
| const pj_str_t *param_text) |
| { |
| return pjsip_endpt_create_request_from_hdr( endpt, &message_method, |
| target, |
| param_from, param_to, |
| NULL, param_call_id, |
| param_cseq, param_text ); |
| } |
| |
| /* |
| * Create independent message from string (instead of from header). |
| */ |
| PJ_DEF(pjsip_tx_data*) |
| pjsip_messaging_create_msg( pjsip_endpoint *endpt, |
| const pj_str_t *target, |
| const pj_str_t *param_from, |
| const pj_str_t *param_to, |
| const pj_str_t *param_call_id, |
| int param_cseq, |
| const pj_str_t *param_text) |
| { |
| return pjsip_endpt_create_request( endpt, &message_method, target, |
| param_from, param_to, NULL, param_call_id, |
| param_cseq, param_text); |
| } |
| |
| /* |
| * Initiate transaction to send outgoing message. |
| */ |
| PJ_DEF(pj_status_t) |
| pjsip_messaging_send_msg( pjsip_endpoint *endpt, pjsip_tx_data *tdata, |
| void *token, pjsip_messaging_cb cb ) |
| { |
| pjsip_transaction *tsx; |
| struct messaging_data *msg_data; |
| |
| /* Create transaction. */ |
| tsx = pjsip_endpt_create_tsx(endpt); |
| if (!tsx) { |
| pjsip_tx_data_dec_ref(tdata); |
| return -1; |
| } |
| |
| /* Save parameters to messaging data and attach to tsx. */ |
| msg_data = pj_pool_calloc(tsx->pool, 1, sizeof(struct messaging_data)); |
| msg_data->cb = cb; |
| msg_data->token = token; |
| |
| /* Init transaction. */ |
| tsx->module_data[module_id] = msg_data; |
| if (pjsip_tsx_init_uac(tsx, tdata) != 0) { |
| pjsip_tx_data_dec_ref(tdata); |
| pjsip_endpt_destroy_tsx(endpt, tsx); |
| return -1; |
| } |
| |
| pjsip_endpt_register_tsx(endpt, tsx); |
| |
| /* |
| * Instruct transaction to send message. |
| * Further events will be received via transaction's event. |
| */ |
| pjsip_tsx_on_tx_msg(tsx, tdata); |
| |
| /* Decrement reference counter. */ |
| pjsip_tx_data_dec_ref(tdata); |
| return 0; |
| } |
| |
| |
| /* |
| * Create 'IM session'. |
| */ |
| PJ_DEF(pjsip_messaging_session*) |
| pjsip_messaging_create_session( pjsip_endpoint *endpt, const pj_str_t *param_from, |
| const pj_str_t *param_to ) |
| { |
| pj_pool_t *pool; |
| pjsip_messaging_session *ses; |
| pj_str_t tmp, to; |
| |
| pool = pjsip_endpt_create_pool(endpt, "imsess", 1024, 1024); |
| if (!pool) |
| return NULL; |
| |
| ses = pj_pool_calloc(pool, 1, sizeof(pjsip_messaging_session)); |
| ses->pool = pool; |
| ses->endpt = endpt; |
| |
| ses->call_id = pjsip_cid_hdr_create(pool); |
| pj_create_unique_string(pool, &ses->call_id->id); |
| |
| ses->cseq = pjsip_cseq_hdr_create(pool); |
| ses->cseq->cseq = pj_rand(); |
| ses->cseq->method = message_method; |
| |
| ses->from = pjsip_from_hdr_create(pool); |
| pj_strdup_with_null(pool, &tmp, param_from); |
| ses->from->uri = pjsip_parse_uri(pool, tmp.ptr, tmp.slen, PJSIP_PARSE_URI_AS_NAMEADDR); |
| if (ses->from->uri == NULL) { |
| pjsip_endpt_destroy_pool(endpt, pool); |
| return NULL; |
| } |
| pj_create_unique_string(pool, &ses->from->tag); |
| |
| ses->to = pjsip_to_hdr_create(pool); |
| pj_strdup_with_null(pool, &to, param_from); |
| ses->to->uri = pjsip_parse_uri(pool, to.ptr, to.slen, PJSIP_PARSE_URI_AS_NAMEADDR); |
| if (ses->to->uri == NULL) { |
| pjsip_endpt_destroy_pool(endpt, pool); |
| return NULL; |
| } |
| |
| PJ_LOG(4,(THIS_FILE, "IM session created: recipient=%s", to.ptr)); |
| return ses; |
| } |
| |
| |
| /* |
| * Send IM message using identification from 'IM session'. |
| */ |
| PJ_DEF(pjsip_tx_data*) |
| pjsip_messaging_session_create_msg( pjsip_messaging_session *ses, const pj_str_t *text ) |
| { |
| return pjsip_endpt_create_request_from_hdr( ses->endpt, |
| &message_method, |
| ses->to->uri, |
| ses->from, |
| ses->to, |
| NULL, |
| ses->call_id, |
| ses->cseq->cseq++, |
| text); |
| } |
| |
| |
| /* |
| * Destroy 'IM session'. |
| */ |
| PJ_DEF(pj_status_t) |
| pjsip_messaging_destroy_session( pjsip_messaging_session *ses ) |
| { |
| /* |
| * NOTE ABOUT POSSIBLE BUG HERE... |
| * |
| * We don't check number of pending transaction before destroying IM |
| * session. As the result, the headers in the txdata of pending transaction |
| * wil be INVALID once the IM session is deleted (because we only |
| * shallo_clone()-ed them). |
| * |
| * This normally should be okay, because once the message is |
| * submitted to transaction, the transaction (or rather the transport) |
| * will 'print' the message to a buffer, and once it is printed, it |
| * won't try to access the original message again. So even when the |
| * original message has a dangling pointer, we should be safe. |
| * |
| * However, it will cause a problem if: |
| * - resolving completes asynchronously and with a substantial delay, |
| * and before the resolver/transport finished its job the user |
| * destroy the IM session. |
| * - if the transmit data is invalidated after the IM session is |
| * destroyed. |
| */ |
| |
| pjsip_endpt_destroy_pool(ses->endpt, ses->pool); |
| return 0; |
| } |
| |
| |
| static pj_status_t messaging_init( pjsip_endpoint *endpt, |
| struct pjsip_module *mod, pj_uint32_t id ) |
| { |
| PJ_UNUSED_ARG(endpt) |
| PJ_UNUSED_ARG(mod) |
| |
| module_id = id; |
| return 0; |
| } |
| |
| static pj_status_t messaging_start( struct pjsip_module *mod ) |
| { |
| PJ_UNUSED_ARG(mod) |
| return 0; |
| } |
| |
| static pj_status_t messaging_deinit( struct pjsip_module *mod ) |
| { |
| PJ_UNUSED_ARG(mod) |
| return 0; |
| } |
| |
| static void messaging_tsx_handler( struct pjsip_module *mod, pjsip_event *event ) |
| { |
| pjsip_transaction *tsx = event->obj.tsx; |
| struct messaging_data *mod_data; |
| |
| PJ_UNUSED_ARG(mod) |
| |
| /* Ignore non transaction event */ |
| if (event->type != PJSIP_EVENT_TSX_STATE_CHANGED || tsx == NULL) |
| return; |
| |
| /* If this is an incoming message, inform application. */ |
| if (tsx->role == PJSIP_ROLE_UAS) { |
| int status = 100; |
| pjsip_tx_data *tdata; |
| |
| /* Check if we already answered this request. */ |
| if (tsx->status_code >= 200) |
| return; |
| |
| /* Only handle MESSAGE requests!. */ |
| if (pjsip_method_cmp(&tsx->method, &message_method) != 0) |
| return; |
| |
| /* Call application callback. */ |
| if (incoming_cb) |
| status = (*incoming_cb)(event->src.rdata); |
| |
| if (status < 200 || status >= 700) |
| status = PJSIP_SC_INTERNAL_SERVER_ERROR; |
| |
| /* Respond request. */ |
| tdata = pjsip_endpt_create_response(tsx->endpt, event->src.rdata, status ); |
| if (tdata) |
| pjsip_tsx_on_tx_msg(tsx, tdata); |
| |
| return; |
| } |
| |
| /* Ignore if it's not something that came from messaging module. */ |
| mod_data = tsx->module_data[ module_id ]; |
| if (mod_data == NULL) |
| return; |
| |
| /* Ignore non final response. */ |
| if (tsx->status_code < 200) |
| return; |
| |
| /* Don't want to call the callback more than once. */ |
| tsx->module_data[ module_id ] = NULL; |
| |
| /* Now call the callback. */ |
| if (mod_data->cb) { |
| (*mod_data->cb)(mod_data->token, tsx->status_code); |
| } |
| } |
| |
| static pjsip_module messaging_module = |
| { |
| { "Messaging", 9}, /* Name. */ |
| 0, /* Flag */ |
| 128, /* Priority */ |
| NULL, /* User agent instance, initialized by APP. */ |
| 0, /* Number of methods supported (will be initialized later). */ |
| { 0 }, /* Array of methods (will be initialized later) */ |
| &messaging_init, /* init_module() */ |
| &messaging_start, /* start_module() */ |
| &messaging_deinit, /* deinit_module() */ |
| &messaging_tsx_handler, /* tsx_handler() */ |
| }; |
| |
| PJ_DEF(pjsip_module*) pjsip_messaging_get_module() |
| { |
| static pj_str_t method_str = { "MESSAGE", 7 }; |
| |
| pjsip_method_init_np( &message_method, &method_str); |
| |
| messaging_module.method_cnt = 1; |
| messaging_module.methods[0] = &message_method; |
| |
| return &messaging_module; |
| } |
| |