// ---------------------------------------------------------------------
// Leave group
void lsd_leave(lsd_handle_t* self, const char* group)
{
assert(self);
assert(group);
zre_node_leave(self->interface, group);
}
static void
node_task (void *args, zctx_t *ctx, void *pipe)
{
zre_node_t *node = zre_node_new ();
int64_t counter = 0;
char *to_peer = NULL; // Either of these set,
char *to_group = NULL; // and we set a message
char *cookie = NULL;
zmq_pollitem_t pollitems [] = {
{ pipe, 0, ZMQ_POLLIN, 0 },
{ zre_node_handle (node), 0, ZMQ_POLLIN, 0 }
};
// Do something once a second
int64_t trigger = zclock_time () + 1000;
while (!zctx_interrupted) {
if (zmq_poll (pollitems, 2, randof (1000) * ZMQ_POLL_MSEC) == -1)
break; // Interrupted
if (pollitems [0].revents & ZMQ_POLLIN)
break; // Any command from parent means EXIT
// Process an event from node
if (pollitems [1].revents & ZMQ_POLLIN) {
zmsg_t *incoming = zre_node_recv (node);
if (!incoming)
break; // Interrupted
char *event = zmsg_popstr (incoming);
if (streq (event, "ENTER")) {
// Always say hello to new peer
to_peer = zmsg_popstr (incoming);
}
else if (streq (event, "EXIT")) {
// Always try talk to departed peer
to_peer = zmsg_popstr (incoming);
}
else if (streq (event, "WHISPER")) {
// Send back response 1/2 the time
if (randof (2) == 0) {
to_peer = zmsg_popstr (incoming);
cookie = zmsg_popstr (incoming);
}
}
else if (streq (event, "SHOUT")) {
to_peer = zmsg_popstr (incoming);
to_group = zmsg_popstr (incoming);
cookie = zmsg_popstr (incoming);
// Send peer response 1/3rd the time
if (randof (3) > 0) {
free (to_peer);
to_peer = NULL;
}
// Send group response 1/3rd the time
if (randof (3) > 0) {
free (to_group);
to_group = NULL;
}
}
else if (streq (event, "JOIN")) {
char *from_peer = zmsg_popstr (incoming);
char *group = zmsg_popstr (incoming);
if (randof (3) > 0) {
zre_node_join (node, group);
}
free (from_peer);
free (group);
}
else if (streq (event, "LEAVE")) {
char *from_peer = zmsg_popstr (incoming);
char *group = zmsg_popstr (incoming);
if (randof (3) > 0) {
zre_node_leave (node, group);
}
free (from_peer);
free (group);
}
else if (streq (event, "DELIVER")) {
char *filename = zmsg_popstr (incoming);
char *fullname = zmsg_popstr (incoming);
printf ("I: received file %s\n", fullname);
free (fullname);
free (filename);
}
free (event);
zmsg_destroy (&incoming);
// Send outgoing messages if needed
if (to_peer) {
zmsg_t *outgoing = zmsg_new ();
zmsg_addstr (outgoing, to_peer);
zmsg_addstr (outgoing, "%lu", counter++);
zre_node_whisper (node, &outgoing);
free (to_peer);
to_peer = NULL;
}
if (to_group) {
zmsg_t *outgoing = zmsg_new ();
zmsg_addstr (outgoing, to_group);
zmsg_addstr (outgoing, "%lu", counter++);
zre_node_shout (node, &outgoing);
free (to_group);
to_group = NULL;
}
if (cookie) {
free (cookie);
cookie = NULL;
}
}
if (zclock_time () >= trigger) {
trigger = zclock_time () + 1000;
char group [10];
sprintf (group, "GROUP%03d", randof (MAX_GROUP));
if (randof (4) == 0)
zre_node_join (node, group);
else if (randof (3) == 0)
zre_node_leave (node, group);
}
}
zre_node_destroy (&node);
}