Enable Late Offer Answer Mode (LOAM) feature in the pjsua (#3869)

pjsip-apps/src/pjsua/pjsua_app.c

@@ -1998,6 +1998,9 @@ static pj_status_t app_init(void)
     pjsua_call_setting_default(&call_opt);
     call_opt.aud_cnt = app_config.aud_cnt;
     call_opt.vid_cnt = app_config.vid.vid_cnt;
+    if (app_config.enable_loam) {
+        call_opt.flag |= PJSUA_CALL_NO_SDP_OFFER;
+    }
 
 #if defined(PJSIP_HAS_TLS_TRANSPORT) && PJSIP_HAS_TLS_TRANSPORT!=0
     /* Wipe out TLS key settings in transport configs */

pjsip-apps/src/pjsua/pjsua_app_cli.c

@@ -38,6 +38,7 @@
 #define CMD_QUIT                    110
 #define CMD_RESTART                 120
 #define CMD_HANDLE_IP_CHANGE        130
+#define CMD_TOGGLE_SDP_OFFER        140
 
 /* call level 2 command */
 #define CMD_CALL_NEW                ((CMD_CALL*10)+1)
@@ -2086,6 +2087,19 @@ static pj_status_t cmd_show_current_call(pj_cli_cmd_val *cval)
     return PJ_SUCCESS;
 }
 
+static pj_status_t cmd_toggle_call_sdp_offer(pj_cli_cmd_val* cval)
+{
+    char out_str[64];
+    app_config.enable_loam = !app_config.enable_loam;
+
+    pj_ansi_snprintf(out_str, sizeof(out_str),
+                   "Subsequent calls and UPDATEs will contain SDP offer: %s\n",
+                   app_config.enable_loam ? "No" : "Yes");
+    pj_cli_sess_write_msg(cval->sess, out_str, pj_ansi_strlen(out_str));
+
+    return PJ_SUCCESS;
+}
+
 /* Call handler */
 pj_status_t cmd_call_handler(pj_cli_cmd_val *cval)
 {
@@ -2094,6 +2108,14 @@ pj_status_t cmd_call_handler(pj_cli_cmd_val *cval)
 
     CHECK_PJSUA_RUNNING();
 
+    /* Update call setting */
+    pjsua_call_setting_default(&call_opt);
+    call_opt.aud_cnt = app_config.aud_cnt;
+    call_opt.vid_cnt = app_config.vid.vid_cnt;
+    if (app_config.enable_loam) {
+        call_opt.flag |= PJSUA_CALL_NO_SDP_OFFER;
+    }
+
     switch(cmd_id) {
     case CMD_CALL_NEW:
         status = cmd_make_single_call(cval);
@@ -3221,12 +3243,17 @@ static pj_status_t add_other_command(pj_cli_t *c)
     char* ip_change_command =
         "<CMD name='ip_change' id='130' desc='Handle IP change'/>";
 
+    char* toggle_sdp_offer_command =
+        "<CMD name='toggle_sdp_offer' sc='o' id='140' "
+        "desc='Toggle SDP offer use on subsequent calls and UPDATEs' />";
+
     pj_status_t status;
     pj_str_t sleep_xml = pj_str(sleep_command);
     pj_str_t network_xml = pj_str(network_command);
     pj_str_t shutdown_xml = pj_str(shutdown_command);
     pj_str_t restart_xml = pj_str(restart_command);
     pj_str_t ip_change_xml = pj_str(ip_change_command);
+    pj_str_t toggle_sdp_offer_xml = pj_str(toggle_sdp_offer_command);
 
     status = pj_cli_add_cmd_from_xml(c, NULL,
                                      &sleep_xml, cmd_sleep_handler,
@@ -3257,6 +3284,13 @@ static pj_status_t add_other_command(pj_cli_t *c)
     status = pj_cli_add_cmd_from_xml(c, NULL,
                                      &ip_change_xml, cmd_ip_change_handler,
                                      NULL, NULL);
+    if (status != PJ_SUCCESS)
+        return status;
+
+    status = pj_cli_add_cmd_from_xml(c, NULL,
+                                     &toggle_sdp_offer_xml,
+                                     cmd_toggle_call_sdp_offer,
+                                     NULL, NULL);
 
     return status;
 }

pjsip-apps/src/pjsua/pjsua_app_common.h

@@ -78,6 +78,7 @@ typedef struct pjsua_app_config
     pj_bool_t               ipv6;
     pj_bool_t               enable_qos;
     pj_bool_t               no_mci;
+    pj_bool_t               enable_loam;
     pj_bool_t               no_tcp;
     pj_bool_t               no_udp;
     pj_bool_t               use_tls;

pjsip-apps/src/pjsua/pjsua_app_config.c

@@ -1988,6 +1988,7 @@ int write_settings(pjsua_app_config *config, char *buf, pj_size_t max)
     if (config->no_mci) {
         pj_strcat2(&cfg, "--no-mci\n");
     }
+
     /* UDP Transport. */
     pj_ansi_snprintf(line, sizeof(line), "--local-port %d\n",
                      config->udp_cfg.port);

pjsip-apps/src/pjsua/pjsua_app_legacy.c

@@ -236,7 +236,7 @@ static void keystroke_help()
     puts("|  a  Answer call              |  i  Send IM              | !a  Modify accnt. |");
     puts("|  h  Hangup call  (ha=all)    |  s  Subscribe presence   | rr  (Re-)register |");
     puts("|  H  Hold call                |  u  Unsubscribe presence | ru  Unregister    |");
-    puts("|                              |  D  Subscribe dlg event  |                   |");
+    puts("|  o Toggle call SDP offer     |  D  Subscribe dlg event  |                   |");
     puts("|                              |  Du Unsub dlg event      |                   |");
     puts("|  v  re-inVite (release hold) |  t  Toggle online status |  >  Cycle next ac.|");
     puts("|  U  send UPDATE              |  T  Set online status    |  <  Cycle prev ac.|");
@@ -734,6 +734,9 @@ static void ui_make_new_call()
 
         pjsua_msg_data_init(&msg_data_);
         TEST_MULTIPART(&msg_data_);
+        if (app_config.enable_loam) {
+            call_opt.flag |= PJSUA_CALL_NO_SDP_OFFER;
+        }
         pjsua_call_make_call(current_acc, &tmp, &call_opt, NULL,
                              &msg_data_, &current_call);
 
@@ -773,6 +776,10 @@ static void ui_make_multi_call()
         tmp = pj_str(result.uri_result);
     }
 
+    if (app_config.enable_loam) {
+        call_opt.flag |= PJSUA_CALL_NO_SDP_OFFER;
+    }
+
     for (i=0; i<my_atoi(menuin); ++i) {
         pj_status_t status;
 
@@ -1081,6 +1088,11 @@ static void ui_delete_account()
     }
 }
 
+static void ui_unset_loam_mode()
+{
+    app_config.enable_loam = PJ_FALSE;
+}
+
 static void ui_call_hold()
 {
     if (current_call != -1) {
@@ -1099,6 +1111,9 @@ static void ui_call_reinvite()
 static void ui_send_update()
 {
     if (current_call != -1) {
+        if (app_config.enable_loam) {
+            call_opt.flag |= PJSUA_CALL_NO_SDP_OFFER;
+        }
         pjsua_call_update2(current_call, &call_opt, NULL);
     } else {
         PJ_LOG(3,(THIS_FILE, "No current call"));
@@ -1443,6 +1458,18 @@ static void ui_send_arbitrary_request()
     }
 }
 
+static void ui_toggle_call_sdp_offer()
+{
+    app_config.enable_loam = !app_config.enable_loam;
+
+    printf("Subsequent calls and UPDATEs will contain SDP offer: ");
+    if (app_config.enable_loam) {
+        printf("NO.\n");
+    } else {
+        printf("YES.\n");
+    }
+}
+
 static void ui_echo(char menuin[])
 {
     if (pj_ansi_strnicmp(menuin, "echo", 4)==0) {
@@ -1942,6 +1969,13 @@ void legacy_main(void)
             ui_call_hold();
             break;
 
+        case 'o':
+            /*
+             * Toggle call SDP offer
+             */
+            ui_toggle_call_sdp_offer();
+            break;
+
         case 'v':
 #if PJSUA_HAS_VIDEO
             if (menuin[1]=='i' && menuin[2]=='d' && menuin[3]==' ') {