######## Websocket module ########
tcp_accept_no_cl=yes

######## Basic HTTP request handling ########
loadmodule "xhttp.so"

######## Websocket module ########
loadmodule "websocket.so"
modparam("websocket", "keepalive_mechanism", 1)
modparam("websocket", "keepalive_timeout", 30)
modparam("websocket", "keepalive_processes", 1)
modparam("websocket", "keepalive_interval", 1)
modparam("websocket", "ping_application_data", "Kazoo encourages you to keep alive")
modparam("websocket", "sub_protocols", 1)

route[HANDLE_WEBSOCKETS]
{
    # Do NAT traversal stuff for requests from a WebSocket
    # connection - even if it is not behind a NAT!
    # This won't be needed in the future if Kamailio and the
    # WebSocket client support Outbound and Path.
    if (nat_uac_test(64)) {
        xlog("L_INFO", "$ci|log|this is a websocket request\n");
        force_rport();
        if (is_method("REGISTER")) {
            fix_nated_register();
        } else {
            if (!add_contact_alias()) {
                xlog("L_INFO", "$ci|stop|error aliasing contact <$ct>\n");
                sl_send_reply("400", "Bad Request");
                exit;
            }
        }
    }
}

route[NAT_WEBSOCKETS_CORRECT]
{
    # Do NAT traversal stuff for replies to a WebSocket connection
    # - even if it is not behind a NAT!
    # This won't be needed in the future if Kamailio and the
    # WebSocket client support Outbound and Path.
    if (nat_uac_test(64)) {
        xlog("L_INFO", "$ci|log|this is a websocket request\n");
        add_contact_alias();
    }
}

event_route[xhttp:request]
{
    xlog("L_INFO", "HTTP Request Received\n");
    set_reply_close();
    set_reply_no_connect();

    if ($hdr(Upgrade) =~ "websocket" && $hdr(Connection) =~ "Upgrade" && $rm =~ "GET") {
        xlog("L_INFO", "websocket request from $si:$sp received\n");

        # Validate Host - make sure the client is using the correct
        # alias for WebSockets
        if ($hdr(Host) == $null || !is_myself("sip:" + $hdr(Host))) {
            xlog("L_WARN", "websocket request had bad host $hdr(Host)\n");
            xhttp_reply("403", "Forbidden", "", "");
            exit;
        }

        # ws_handle_handshake() exits (no further configuration file
        # processing of the request) when complete.
        if (ws_handle_handshake()) {
            exit;
        }
    }
    xhttp_reply("404", "Not Found", "", "");
}

event_route[websocket:closed] {
    xlog("L_INFO", "websocket connection from $si:$sp has closed\n");
}