void
ziflist_test (bool verbose)
{
printf (" * ziflist: ");
if (verbose)
printf ("\n");
// @selftest
ziflist_t *iflist = ziflist_new ();
assert (iflist);
size_t items = ziflist_size (iflist);
if (verbose) {
// printf ("ziflist: interfaces=%zu\n", ziflist_size (iflist));
const char *name = ziflist_first (iflist);
while (name) {
printf (" - name=%s address=%s netmask=%s broadcast=%s\n",
name, ziflist_address (iflist), ziflist_netmask (iflist), ziflist_broadcast (iflist));
name = ziflist_next (iflist);
}
}
ziflist_reload (iflist);
assert (items == ziflist_size (iflist));
ziflist_destroy (&iflist);
// @end
printf ("OK\n");
}
static void
s_self_prepare_udp (self_t *self)
{
// Create our UDP socket
if (self->udpsock)
zsys_udp_close (self->udpsock);
self->hostname [0] = 0;
self->udpsock = zsys_udp_new (false);
if (self->udpsock == INVALID_SOCKET)
return;
// Get the network interface fro ZSYS_INTERFACE or else use first
// broadcast interface defined on system. ZSYS_INTERFACE=* means
// use INADDR_ANY + INADDR_BROADCAST.
const char *iface = zsys_interface ();
in_addr_t bind_to = 0;
in_addr_t send_to = 0;
if (streq (iface, "*")) {
// Wildcard means bind to INADDR_ANY and send to INADDR_BROADCAST
bind_to = INADDR_ANY;
send_to = INADDR_BROADCAST;
}
else {
// Look for matching interface, or first ziflist item
ziflist_t *iflist = ziflist_new ();
assert (iflist);
const char *name = ziflist_first (iflist);
while (name) {
if (streq (iface, name) || streq (iface, "")) {
// Using inet_addr instead of inet_aton or inet_atop
// because these are not supported in Win XP
send_to = inet_addr (ziflist_broadcast (iflist));
bind_to = inet_addr (ziflist_address (iflist));
if (self->verbose)
zsys_info ("zbeacon: interface=%s address=%s broadcast=%s",
name, ziflist_address (iflist), ziflist_broadcast (iflist));
break; // iface is known, so allow it
}
name = ziflist_next (iflist);
}
ziflist_destroy (&iflist);
}
if (bind_to) {
self->broadcast.sin_family = AF_INET;
self->broadcast.sin_port = htons (self->port_nbr);
self->broadcast.sin_addr.s_addr = send_to;
inaddr_t address = self->broadcast;
address.sin_addr.s_addr = bind_to;
// Bind to the port on all interfaces
#if (defined (__WINDOWS__))
inaddr_t sockaddr = address;
#elif (defined (__APPLE__))
inaddr_t sockaddr = self->broadcast;
sockaddr.sin_addr.s_addr = htons (INADDR_ANY);
#else
inaddr_t sockaddr = self->broadcast;
#endif
// Bind must succeed; we treat failure here as a hard violation (assert)
if (bind (self->udpsock, (struct sockaddr *) &sockaddr, sizeof (inaddr_t)))
zsys_socket_error ("bind");
// Get our hostname so we can send it back to the API
if (getnameinfo ((struct sockaddr *) &address, sizeof (inaddr_t),
self->hostname, NI_MAXHOST, NULL, 0, NI_NUMERICHOST) == 0) {
if (self->verbose)
zsys_info ("zbeacon: configured, hostname=%s", self->hostname);
}
}
}