- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return;
-
- switch (event) {
- case DHCP_EVENT_NO_LEASE:
- log_debug_link(link, "IP address in use.");
- break;
- case DHCP_EVENT_EXPIRED:
- case DHCP_EVENT_STOP:
- case DHCP_EVENT_IP_CHANGE:
- if (link->network->dhcp_critical) {
- log_error_link(link, "DHCPv4 connection considered system critical, "
- "ignoring request to reconfigure it.");
- return;
- }
-
- if (link->dhcp_lease) {
- r = dhcp_lease_lost(link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- }
-
- if (event == DHCP_EVENT_IP_CHANGE) {
- r = dhcp_lease_acquired(client, link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- }
-
- if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) {
- if (!sd_ipv4ll_is_running(link->ipv4ll))
- r = sd_ipv4ll_start(link->ipv4ll);
- else if (ipv4ll_is_bound(link->ipv4ll))
- r = ipv4ll_address_update(link, false);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- }
-
- break;
- case DHCP_EVENT_IP_ACQUIRE:
- r = dhcp_lease_acquired(client, link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- if (link->ipv4ll) {
- if (ipv4ll_is_bound(link->ipv4ll))
- r = ipv4ll_address_update(link, true);
- else
- r = sd_ipv4ll_stop(link->ipv4ll);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- }
- break;
- default:
- if (event < 0)
- log_warning_link(link, "DHCP error: %s", strerror(-event));
- else
- log_warning_link(link, "DHCP unknown event: %d", event);
- break;
- }
-
- return;
-}
-
-static int ipv4ll_address_update(Link *link, bool deprecate) {
- int r;
- struct in_addr addr;
-
- assert(link);
-
- r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
- if (r >= 0) {
- _cleanup_address_free_ Address *address = NULL;
-
- log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u",
- deprecate ? "deprecate" : "approve",
- ADDRESS_FMT_VAL(addr));
-
- r = address_new_dynamic(&address);
- if (r < 0) {
- log_error_link(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->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME;
- address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen);
-
- address_update(address, link, &address_update_handler);
- link_ref(link);
- }
-
- return 0;
-
-}
-
-static int ipv4ll_address_lost(Link *link) {
- int r;
- struct in_addr addr;
-
- assert(link);
-
- r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
- if (r >= 0) {
- _cleanup_address_free_ Address *address = NULL;
- _cleanup_route_free_ Route *route = NULL;
-
- log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
- ADDRESS_FMT_VAL(addr));
-
- r = address_new_dynamic(&address);
- if (r < 0) {
- log_error_link(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, &address_drop_handler);
- link_ref(link);
-
- r = route_new_dynamic(&route);
- if (r < 0) {
- log_error_link(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
-
- route->family = AF_INET;
- route->scope = RT_SCOPE_LINK;
- route->metrics = 99;
-
- route_drop(route, link, &route_drop_handler);
- link_ref(link);
- }
-
- return 0;
-}
-
-static bool ipv4ll_is_bound(sd_ipv4ll *ll) {
- int r;
- struct in_addr addr;
-
- assert(ll);
-
- r = sd_ipv4ll_get_address(ll, &addr);
- if (r < 0)
- return false;
- return true;
-}
-
-static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
- struct in_addr address;
- int r;
-
- assert(ll);
- assert(link);
-
- r = sd_ipv4ll_get_address(ll, &address);
- if (r < 0)
- return r;