[mod_event_socket] FS Closes Call after Transfer

[zek]

We're developing some custom FS library on PHP and I noticed and came across with a bug so I just tested this behavior with some open-source libraries and came across same result.

So when I execute transfer app in outbound socket server, it sometimes hangups call with has executed the last dialplan instruction error.

2020-04-25 22:42:43.258052 [NOTICE] switch_core_state_machine.c:386 sofia/internal/phone12@172.254.1.4:5061 has executed the last dialplan instruction, hanging up.
2020-04-25 22:42:43.258052 [NOTICE] switch_core_state_machine.c:388 Hangup sofia/internal/phone12@172.254.1.4:5061 [CS_EXECUTE] [NORMAL_CLEARING]

Dialplan is as below.

<extension name="menu20">
<condition field="destination_number" expression="^menu20$">
<action application="socket" data="172.254.2.1:6969 async full"/>
</condition>
</extension>

This Demo app simply accepts call, speaks then makes transfer to menu20 (socket 172.254.2.1:6969). And this is not working as I expect.

var esl = require('modesl');

var esl_server = new esl.Server({ port: 6969, host: '172.254.2.1', myevents: true }, function () {
  console.log("esl server is up");
});

esl_server.on('connection::ready', function (conn, id) {
  console.log('new call ' + id);
  conn.call_start = new Date().getTime();

  conn.execute('answer', null, '', function () {
    conn.execute('speak', 'flite|awb|bip bop', '', function () {
      conn.execute('transfer', 'menu20 XML internal', '', function () {
        conn.disconnect();
      });
    });
  });

  conn.on('esl::end', function (evt, body) {
    this.call_end = new Date().getTime();
    var delta = (this.call_end - this.call_start) / 1000;
    console.log("Call duration " + delta + " seconds");
  });
});

However If I just disconnect socket without waiting transfer to be completed as below, it loops forever and call doesn't hangup.

var esl = require('modesl');

var esl_server = new esl.Server({ port: 6969, host: '172.254.2.1', myevents: true }, function () {
  console.log("esl server is up");
});

esl_server.on('connection::ready', function (conn, id) {
  console.log('new call ' + id);
  conn.call_start = new Date().getTime();

  conn.execute('answer', null, '', function () {
    conn.execute('speak', 'flite|awb|bip bop', '', function () {
      conn.execute('transfer', 'menu20 XML internal');
      conn.disconnect();
    });
  });

  conn.on('esl::end', function (evt, body) {
    this.call_end = new Date().getTime();
    var delta = (this.call_end - this.call_start) / 1000;
    console.log("Call duration " + delta + " seconds");
  });
});

I've also tried with bridge loopback/menu20 and this is working but just messes CDRs.

[kalmik]

Have you tried to set socket_resume to true before call socket application? It should do the job

[zek]

Have you tried to set socket_resume to true before call socket application? It should do the job

Yes. I've tried but it doesn't work.