int main (void)
{
initialise_network ();
// Check that we have local networking via ZeroMQ
void *ctx = zmq_ctx_new ();
assert (ctx);
void *dealer = zmq_socket (ctx, ZMQ_DEALER);
if (zmq_bind (dealer, "tcp://127.0.0.1:5670") == -1) {
printf ("E: Cannot find 127.0.0.1 -- your system does not have local\n");
printf ("E: networking. Please fix this before running libzmq checks.\n");
return -1;
}
// Check that we can create 1,000 sockets
int handle [1000];
int count;
for (count = 0; count < 1000; count++) {
handle [count] = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (handle [count] == -1) {
printf ("W: Only able to create %d sockets on this box\n", count);
printf ("I: Tune your system to increase maximum allowed file handles\n");
#if defined (ZMQ_HAVE_OSX)
printf ("I: On OS/X, run 'ulimit -n 1200' in bash");
#elif defined (ZMQ_HAVE_LINUX)
printf ("I: On Linux, run 'ulimit -n 1200' in bash");
#endif
return -1;
}
}
// Release the socket handles
for (count = 0; count < 1000; count++) {
close(handle[count]);
}
}
//
//
// Main procedure
//
//
int main(int argc, char **argv) {
int shutdown = 0; // Shutdown flag
struct timer_list timers; // Timers
int payload_len; // length of payload returned
struct payload_pkt app_data; // App payload data
char node_name[HOSTNAME_LEN]; // Node name
parse_options(argc, argv); // Parse command line parameters
debug(DEBUG_ESSENTIAL, "Mesh starting in mode: %d\n", operating_mode);
initialise_network(sizeof(struct payload_pkt),notify_link_up, notify_link_down); // Initialise the network details with callbacks
initialise_timers(&timers); // and set all timers
switch (operating_mode) {
case OPMODE_MASTER: // Only Master nodes are responsible for broadcasting
add_timer(TIMER_BROADCAST, 5); // Set to refresh network in y seconds
break;
case OPMODE_SLAVE:
// add_timer(TIMER_APPLICATION, 15); // Set to refresh network in y seconds
// now done when link comes up
break;
}
add_timer(TIMER_STATS, timeto1hour()); // Report Network Efficiency stats hourly
while (!shutdown) { // While NOT shutdown
wait_on_network_timers(&timers); // Wait for message or timer expiory
if (check_network_msg()) { // If a message is available
handle_network_msg(&node_name[0], (char *)&app_data, &payload_len); // handle the network message
handle_app_msg(&app_data, payload_len); // handle application specific messages
}
switch (check_timers(&timers)) { // check which timer has expired
case TIMER_BROADCAST: // On Broadcast timer
broadcast_network(); // send out broadcast message to contact other nodes
add_timer(TIMER_BROADCAST, 20); // and set to broadcast again in y seconds
break;
case TIMER_PING:
if (check_live_nodes()) { // On Ping check the network
add_timer(TIMER_REPLY, 2); // Expire replies if not received within x secoonds
add_timer(TIMER_PING, 20); // and set to Ping again in y seconds
}
break;
case TIMER_REPLY:
expire_live_nodes(); // Expire other nodes where reply has timed out
break;
case TIMER_STATS:
report_network_stats(); // Report network efficiency stats hourly
add_timer(TIMER_STATS, timeto1hour()); // Set to refresh network in 1 hour
break;
case TIMER_PAYLOAD_ACK:
timeout_payload();
break;
case TIMER_APPLICATION:
handle_app_timer(); // Handle the timer for the App
break;
default:
break;
}
DEBUG_FUNCTION( DEBUG_DETAIL, display_live_network());
DEBUG_FUNCTION( DEBUG_DETAIL, display_timers(&timers));
}
debug(DEBUG_ESSENTIAL, "Mesh node shut down\n");
return 0;
}
