sd-dhcp: check for ipv4 packets

2014-03-30 20:46:40 +02:00
parent d454a6748c
commit 6e34949d72
1 changed files with 5 additions and 0 deletions
@@ -130,6 +130,11 @@ int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len, bool checksum) {
                return -EINVAL;
        }

+        if (packet->ip.version != IPVERSION) {
+                log_dhcp_client(client, "ignoring packet: not IPv4");
+                return -EINVAL;
+        }
+
        if (packet->ip.ihl < 5) {
                log_dhcp_client(client, "ignoring packet: IPv4 IHL (%u words) invalid",
                                packet->ip.ihl);