- if (message->htype != ARPHRD_ETHER || message->hlen != ETHER_ADDR_LEN) {
- log_dhcp_client(client, "not an ethernet packet");
+ if (message->htype != client->arp_type) {
+ log_dhcp_client(client, "packet type does not match client type");
+ return 0;
+ }
+
+ if (client->arp_type == ARPHRD_ETHER) {
+ expected_hlen = ETH_ALEN;
+ expected_chaddr = (const struct ether_addr *) &client->mac_addr;
+ } else {
+ /* Non-ethernet links expect zero chaddr */
+ expected_hlen = 0;
+ expected_chaddr = &zero_mac;
+ }
+
+ if (message->hlen != expected_hlen) {
+ log_dhcp_client(client, "unexpected packet hlen %d", message->hlen);