diff options
Diffstat (limited to 'pjsip/src/pjsip-simple/messaging.c')
-rw-r--r-- | pjsip/src/pjsip-simple/messaging.c | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/pjsip/src/pjsip-simple/messaging.c b/pjsip/src/pjsip-simple/messaging.c new file mode 100644 index 00000000..c3992b4c --- /dev/null +++ b/pjsip/src/pjsip-simple/messaging.c @@ -0,0 +1,337 @@ +/* $Id$ + * + */ +#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_misc.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; +} + |