static void __guac_telnet_event_handler()

in src/protocols/telnet/telnet.c [272:347]

• 49 lines of code
• 16 McCabe index (conditional complexity)

static void __guac_telnet_event_handler(telnet_t* telnet, telnet_event_t* event, void* data) {

    guac_client* client = (guac_client*) data;
    guac_telnet_client* telnet_client = (guac_telnet_client*) client->data;
    guac_telnet_settings* settings = telnet_client->settings;

    switch (event->type) {

        /* Terminal output received */
        case TELNET_EV_DATA:
            guac_terminal_write(telnet_client->term, event->data.buffer, event->data.size);
            guac_telnet_search(client, event->data.buffer, event->data.size);
            break;

        /* Data destined for remote end */
        case TELNET_EV_SEND:
            if (__guac_telnet_write_all(telnet_client->socket_fd, event->data.buffer, event->data.size)
                    != event->data.size)
                guac_client_stop(client);
            break;

        /* Remote feature enabled */
        case TELNET_EV_WILL:
            if (event->neg.telopt == TELNET_TELOPT_ECHO)
                telnet_client->echo_enabled = 0; /* Disable local echo, as remote will echo */
            break;

        /* Remote feature disabled */
        case TELNET_EV_WONT:
            if (event->neg.telopt == TELNET_TELOPT_ECHO)
                telnet_client->echo_enabled = 1; /* Enable local echo, as remote won't echo */
            break;

        /* Local feature enable */
        case TELNET_EV_DO:
            if (event->neg.telopt == TELNET_TELOPT_NAWS) {
                telnet_client->naws_enabled = 1;
                guac_telnet_send_naws(telnet,
                        guac_terminal_get_columns(telnet_client->term),
                        guac_terminal_get_rows(telnet_client->term));
            }
            break;

        /* Terminal type request */
        case TELNET_EV_TTYPE:
            if (event->ttype.cmd == TELNET_TTYPE_SEND)
                telnet_ttype_is(telnet_client->telnet, settings->terminal_type);
            break;

        /* Environment request */
        case TELNET_EV_ENVIRON:

            /* Only send USER if entire environment was requested */
            if (event->environ.size == 0)
                guac_telnet_send_user(telnet, settings->username);

            break;

        /* Connection warnings */
        case TELNET_EV_WARNING:
            guac_client_log(client, GUAC_LOG_WARNING, "%s", event->error.msg);
            break;

        /* Connection errors */
        case TELNET_EV_ERROR:
            guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR,
                    "Telnet connection closing with error: %s", event->error.msg);
            break;

        /* Ignore other events */
        default:
            break;

    }

}