initial import
git-svn-id: https://svn.pjsip.org/repos/pjproject/main@1 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsip_simple/messaging.c b/pjsip/src/pjsip_simple/messaging.c
new file mode 100644
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+++ b/pjsip/src/pjsip_simple/messaging.c
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+/* $Header: /pjproject/pjsip/src/pjsip_simple/messaging.c 7 8/31/05 9:05p Bennylp $ */
+#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;
+}
+