void ipv4ll_on_acd(sd_ipv4acd *acd, int event, void *userdata) {
sd_ipv4ll *ll = userdata;
IPV4LL_DONT_DESTROY(ll);
int r;
assert(acd);
assert(ll);
switch (event) {
case SD_IPV4ACD_EVENT_STOP:
ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_STOP);
ll->claimed_address = 0;
break;
case SD_IPV4ACD_EVENT_BIND:
ll->claimed_address = ll->address;
ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_BIND);
break;
case SD_IPV4ACD_EVENT_CONFLICT:
/* if an address was already bound we must call up to the
user to handle this, otherwise we just try again */
if (ll->claimed_address != 0) {
ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_CONFLICT);
ll->claimed_address = 0;
} else {
r = ipv4ll_pick_address(ll);
if (r < 0)
goto error;
r = sd_ipv4acd_start(ll->acd);
if (r < 0)
goto error;
}
break;
default:
assert_not_reached("Invalid IPv4ACD event.");
}
return;
error:
ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_STOP);
}
int sd_ipv4ll_start(sd_ipv4ll *ll) {
int r;
assert_return(ll, -EINVAL);
assert_return(ll->random_data, -EINVAL);
if (ll->address == 0) {
r = ipv4ll_pick_address(ll);
if (r < 0)
return r;
}
r = sd_ipv4acd_start(ll->acd);
if (r < 0)
return r;
return 0;
}
static int client_run(int ifindex, const struct in_addr *pa, const struct ether_addr *ha, sd_event *e) {
sd_ipv4acd *acd;
assert_se(sd_ipv4acd_new(&acd) >= 0);
assert_se(sd_ipv4acd_attach_event(acd, e, 0) >= 0);
assert_se(sd_ipv4acd_set_index(acd, ifindex) >= 0);
assert_se(sd_ipv4acd_set_mac(acd, ha) >= 0);
assert_se(sd_ipv4acd_set_address(acd, pa) >= 0);
assert_se(sd_ipv4acd_set_callback(acd, acd_handler, NULL) >= 0);
log_info("starting IPv4ACD client");
assert_se(sd_ipv4acd_start(acd) >= 0);
assert_se(sd_event_loop(e) >= 0);
assert_se(!sd_ipv4acd_unref(acd));
return EXIT_SUCCESS;
}
