int guac_client_end_frame(guac_client* client) {
/* Update and send timestamp */
client->last_sent_timestamp = guac_timestamp_current();
return guac_protocol_send_sync(client->socket, client->last_sent_timestamp);
}
void* __guacd_client_output_thread(void* data) {
guac_client* client = (guac_client*) data;
guac_socket* socket = client->socket;
/* Guacamole client output loop */
while (client->state == GUAC_CLIENT_RUNNING) {
/* Handle server messages */
if (client->handle_messages) {
/* Only handle messages if synced within threshold */
if (client->last_sent_timestamp - client->last_received_timestamp
< GUACD_SYNC_THRESHOLD) {
int retval = client->handle_messages(client);
if (retval) {
guacd_client_log_guac_error(client,
"Error handling server messages");
guac_client_stop(client);
return NULL;
}
/* Send sync instruction */
client->last_sent_timestamp = guac_timestamp_current();
if (guac_protocol_send_sync(socket, client->last_sent_timestamp)) {
guacd_client_log_guac_error(client,
"Error sending \"sync\" instruction");
guac_client_stop(client);
return NULL;
}
/* Flush */
if (guac_socket_flush(socket)) {
guacd_client_log_guac_error(client,
"Error flushing output");
guac_client_stop(client);
return NULL;
}
}
/* Do not spin while waiting for old sync */
else
__guacdd_sleep(GUACD_MESSAGE_HANDLE_FREQUENCY);
}
/* If no message handler, just sleep until next sync ping */
else
__guacdd_sleep(GUACD_SYNC_FREQUENCY);
} /* End of output loop */
guac_client_stop(client);
return NULL;
}
int ssh_guac_client_size_handler(guac_client* client, int width, int height) {
/* Get terminal */
ssh_guac_client_data* guac_client_data = (ssh_guac_client_data*) client->data;
guac_terminal* terminal = guac_client_data->term;
/* Calculate dimensions */
int rows = height / terminal->display->char_height;
int columns = width / terminal->display->char_width;
pthread_mutex_lock(&(terminal->lock));
/* If size has changed */
if (columns != terminal->term_width || rows != terminal->term_height) {
/* Resize terminal */
guac_terminal_resize(terminal, columns, rows);
/* Update cursor */
guac_terminal_commit_cursor(terminal);
/* Update SSH pty size if connected */
if (guac_client_data->term_channel != NULL)
libssh2_channel_request_pty_size(guac_client_data->term_channel,
terminal->term_width, terminal->term_height);
/* Reset scroll region */
terminal->scroll_end = rows - 1;
guac_terminal_display_flush(terminal->display);
guac_protocol_send_sync(terminal->client->socket,
client->last_sent_timestamp);
guac_socket_flush(terminal->client->socket);
}
pthread_mutex_unlock(&(terminal->lock));
return 0;
}
void test_instruction_write() {
int rfd, wfd;
int fd[2], childpid;
/* Create pipe */
CU_ASSERT_EQUAL_FATAL(pipe(fd), 0);
/* File descriptors */
rfd = fd[0];
wfd = fd[1];
/* Fork */
if ((childpid = fork()) == -1) {
/* ERROR */
perror("fork");
return;
}
/* Child (pipe writer) */
if (childpid != 0) {
guac_socket* socket;
close(rfd);
/* Open guac socket */
socket = guac_socket_open(wfd);
/* Write instruction */
guac_protocol_send_clipboard(socket, "a" UTF8_4 "b" UTF8_4 "c");
guac_protocol_send_sync(socket, 12345);
guac_socket_flush(socket);
guac_socket_close(socket);
exit(0);
}
/* Parent (unit test) */
else {
char expected[] =
"9.clipboard,11.a" UTF8_4 "b" UTF8_4 "c;"
"4.sync,5.12345;";
int numread;
char buffer[1024];
int offset = 0;
close(wfd);
/* Read everything available into buffer */
while ((numread =
read(rfd,
&(buffer[offset]),
sizeof(buffer)-offset)) != 0) {
offset += numread;
}
/* Add NULL terminator */
buffer[offset] = '\0';
/* Read value should be equal to expected value */
CU_ASSERT_STRING_EQUAL(buffer, expected);
}
}
