Broken SIP message standard

[skotow]

Sip messages not recognizing a double-CRLF sequence

in order to work properly and keep socket live state ( for Opensips )

you should send OPTION message . without that socket will close as not getting response from proxy server possible solution

Before
/**
* Send a keep-alive (a double-CRLF sequence).
/
sendKeepAlive() {
if (this.keepAliveDebounceTimeout) {
// We already have an outstanding keep alive, do not send another.
return Promise.resolve();
}
this.keepAliveDebounceTimeout = setTimeout(() => {
this.clearKeepAliveTimeout();
}, this.configuration.keepAliveDebounce * 1000);
return this.send("\r\n\r\n");
}
/*
* Start sending keep-alives.
*/

 After 
 
 sendKeepAlive() {
if (this.keepAliveDebounceTimeout) {
  return Promise.resolve();
}
this.keepAliveDebounceTimeout = setTimeout(() => {
  this.clearKeepAliveTimeout();
}, this.configuration.keepAliveDebounce * 1e3);
  const randomString = Math.random().toString(36).substring(7);
  const prox = "xxxxxxx"
  const toFrom = "xxxxx"
  const optionsRequest = `OPTIONS sip:${prox} SIP/2.0\r\n` +
      `Via: SIP/2.0/WSS xxxxx;branch=z9hG4bK` + randomString + `\r\n` +
      `From: <sip:${toFrom}@${prox}>\r\n` +
      `To: <sip:${toFrom}@${prox}>\r\n` +
      `Call-ID: `+ randomString +`\r\n` +
      `CSeq: 1 OPTIONS\r\n`;
  return this.send(optionsRequest.toString());

}

[seanbright]

https://opensips.org/html/docs/modules/devel/proto_tls.html#param_tls_crlf_pingpong

[skotow]

if you using proto_wss ? I don't think it will work

[seanbright]

If it doesn't work then OpenSIPS should add support for it.

Edit: https://www.rfc-editor.org/rfc/rfc7118#section-6 and https://www.rfc-editor.org/rfc/rfc5626#section-4.4.1