static int ipv4ll_address_lost(Link *link) {
_cleanup_address_free_ Address *address = NULL;
_cleanup_route_free_ Route *route = NULL;
struct in_addr addr;
int r;
assert(link);
link->ipv4ll_route = false;
link->ipv4ll_address = false;
r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
if (r < 0)
return 0;
log_link_debug(link, "IPv4 link-local release %u.%u.%u.%u", ADDRESS_FMT_VAL(addr));
r = address_new_dynamic(&address);
if (r < 0) {
log_link_error(link, "Could not allocate address: %s", strerror(-r));
return r;
}
address->family = AF_INET;
address->in_addr.in = addr;
address->prefixlen = 16;
address->scope = RT_SCOPE_LINK;
address_drop(address, link, &link_address_drop_handler);
r = route_new_dynamic(&route, RTPROT_UNSPEC);
if (r < 0) {
log_link_error(link, "Could not allocate route: %s",
strerror(-r));
return r;
}
route->family = AF_INET;
route->scope = RT_SCOPE_LINK;
route->metrics = IPV4LL_ROUTE_METRIC;
route_drop(route, link, &link_route_drop_handler);
link_client_handler(link);
return 0;
}
static int ipv4ll_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(!link->ipv4ll_route);
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error(link, "could not set ipv4ll route: %s", strerror(-r));
link_enter_failed(link);
}
link->ipv4ll_route = true;
if (link->ipv4ll_address == true)
link_client_handler(link);
return 1;
}
static int ipv4ll_address_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(!link->ipv4ll_address);
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error(link, "could not set ipv4ll address: %s", strerror(-r));
link_enter_failed(link);
} else if (r >= 0)
link_rtnl_process_address(rtnl, m, link->manager);
link->ipv4ll_address = true;
if (link->ipv4ll_route == true)
link_client_handler(link);
return 1;
}
static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,
void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
assert(link->dhcp4_messages);
link->dhcp4_messages --;
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EEXIST) {
log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
link_enter_failed(link);
}
if (!link->dhcp4_messages) {
link->dhcp4_configured = true;
link_client_handler(link);
}
return 1;
}
