static void
cb_candidate_gathering_done(NiceAgent *agent, guint _stream_id,
gpointer data)
{
g_debug("SIGNAL candidate gathering done\n");
// Candidate gathering is done. Send our local candidates on stdout
printf("Copy this line to remote client:\n");
printf("\n ");
print_local_data(agent, _stream_id, 1);
printf("\n");
// Listen on stdin for the remote candidate list
printf("Enter remote data (single line, no wrapping):\n");
g_io_add_watch(io_stdin, G_IO_IN, stdin_remote_info_cb, agent);
printf("> ");
fflush (stdout);
}
static void *
example_thread(void *data)
{
NiceAgent *agent;
NiceCandidate *local, *remote;
GIOChannel* io_stdin;
guint stream_id;
gchar *line = NULL;
int rval;
#ifdef G_OS_WIN32
io_stdin = g_io_channel_win32_new_fd(_fileno(stdin));
#else
io_stdin = g_io_channel_unix_new(fileno(stdin));
#endif
g_io_channel_set_flags (io_stdin, G_IO_FLAG_NONBLOCK, NULL);
// Create the nice agent
agent = nice_agent_new(g_main_loop_get_context (gloop),
NICE_COMPATIBILITY_RFC5245);
if (agent == NULL)
g_error("Failed to create agent");
// Set the STUN settings and controlling mode
if (stun_addr) {
g_object_set(agent, "stun-server", stun_addr, NULL);
g_object_set(agent, "stun-server-port", stun_port, NULL);
}
g_object_set(agent, "controlling-mode", controlling, NULL);
// Connect to the signals
g_signal_connect(agent, "candidate-gathering-done",
G_CALLBACK(cb_candidate_gathering_done), NULL);
g_signal_connect(agent, "new-selected-pair",
G_CALLBACK(cb_new_selected_pair), NULL);
g_signal_connect(agent, "component-state-changed",
G_CALLBACK(cb_component_state_changed), NULL);
// Create a new stream with one component
stream_id = nice_agent_add_stream(agent, 1);
if (stream_id == 0)
g_error("Failed to add stream");
// Attach to the component to receive the data
// Without this call, candidates cannot be gathered
nice_agent_attach_recv(agent, stream_id, 1,
g_main_loop_get_context (gloop), cb_nice_recv, NULL);
// Start gathering local candidates
if (!nice_agent_gather_candidates(agent, stream_id))
g_error("Failed to start candidate gathering");
g_debug("waiting for candidate-gathering-done signal...");
g_mutex_lock(&gather_mutex);
while (!exit_thread && !candidate_gathering_done)
g_cond_wait(&gather_cond, &gather_mutex);
g_mutex_unlock(&gather_mutex);
if (exit_thread)
goto end;
// Candidate gathering is done. Send our local candidates on stdout
printf("Copy this line to remote client:\n");
printf("\n ");
print_local_data(agent, stream_id, 1);
printf("\n");
// Listen on stdin for the remote candidate list
printf("Enter remote data (single line, no wrapping):\n");
printf("> ");
fflush (stdout);
while (!exit_thread) {
GIOStatus s = g_io_channel_read_line (io_stdin, &line, NULL, NULL, NULL);
if (s == G_IO_STATUS_NORMAL) {
// Parse remote candidate list and set it on the agent
rval = parse_remote_data(agent, stream_id, 1, line);
if (rval == EXIT_SUCCESS) {
g_free (line);
break;
} else {
fprintf(stderr, "ERROR: failed to parse remote data\n");
printf("Enter remote data (single line, no wrapping):\n");
printf("> ");
fflush (stdout);
}
g_free (line);
} else if (s == G_IO_STATUS_AGAIN) {
g_usleep (100000);
}
}
g_debug("waiting for state READY or FAILED signal...");
g_mutex_lock(&negotiate_mutex);
while (!exit_thread && !negotiation_done)
g_cond_wait(&negotiate_cond, &negotiate_mutex);
g_mutex_unlock(&negotiate_mutex);
if (exit_thread)
goto end;
// Get current selected candidate pair and print IP address used
if (nice_agent_get_selected_pair (agent, stream_id, 1,
&local, &remote)) {
gchar ipaddr[INET6_ADDRSTRLEN];
nice_address_to_string(&local->addr, ipaddr);
printf("\nNegotiation complete: ([%s]:%d,",
ipaddr, nice_address_get_port(&local->addr));
nice_address_to_string(&remote->addr, ipaddr);
printf(" [%s]:%d)\n", ipaddr, nice_address_get_port(&remote->addr));
}
// Listen to stdin and send data written to it
printf("\nSend lines to remote (Ctrl-D to quit):\n");
printf("> ");
fflush (stdout);
while (!exit_thread) {
GIOStatus s = g_io_channel_read_line (io_stdin, &line, NULL, NULL, NULL);
if (s == G_IO_STATUS_NORMAL) {
nice_agent_send(agent, stream_id, 1, strlen(line), line);
g_free (line);
printf("> ");
fflush (stdout);
} else if (s == G_IO_STATUS_AGAIN) {
g_usleep (100000);
} else {
// Ctrl-D was pressed.
nice_agent_send(agent, stream_id, 1, 1, "\0");
break;
}
}
end:
g_io_channel_unref (io_stdin);
g_object_unref(agent);
g_main_loop_quit (gloop);
return NULL;
}
