int sd_ipv4acd_start(sd_ipv4acd *acd) {
int r;
assert_return(acd, -EINVAL);
assert_return(acd->event, -EINVAL);
assert_return(acd->ifindex > 0, -EINVAL);
assert_return(acd->address != 0, -EINVAL);
assert_return(!ether_addr_is_null(&acd->mac_addr), -EINVAL);
assert_return(acd->state == IPV4ACD_STATE_INIT, -EBUSY);
r = arp_network_bind_raw_socket(acd->ifindex, acd->address, &acd->mac_addr);
if (r < 0)
return r;
safe_close(acd->fd);
acd->fd = r;
acd->defend_window = 0;
acd->n_conflict = 0;
r = sd_event_add_io(acd->event, &acd->receive_message_event_source, acd->fd, EPOLLIN, ipv4acd_on_packet, acd);
if (r < 0)
goto fail;
r = sd_event_source_set_priority(acd->receive_message_event_source, acd->event_priority);
if (r < 0)
goto fail;
(void) sd_event_source_set_description(acd->receive_message_event_source, "ipv4acd-receive-message");
r = ipv4acd_set_next_wakeup(acd, 0, 0);
if (r < 0)
goto fail;
ipv4acd_set_state(acd, IPV4ACD_STATE_STARTED, true);
return 0;
fail:
ipv4acd_reset(acd);
return r;
}
static bool lldp_keep_neighbor(sd_lldp *lldp, sd_lldp_neighbor *n) {
assert(lldp);
assert(n);
/* Don't keep data with a zero TTL */
if (n->ttl <= 0)
return false;
/* Filter out data from the filter address */
if (!ether_addr_is_null(&lldp->filter_address) &&
ether_addr_equal(&lldp->filter_address, &n->source_address))
return false;
/* Only add if the neighbor has a capability we are interested in. Note that we also store all neighbors with
* no caps field set. */
if (n->has_capabilities &&
(n->enabled_capabilities & lldp->capability_mask) == 0)
return false;
/* Keep everything else */
return true;
}
