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sd-dhcp: check for ipv4 packets

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This commit is contained in:
Tom Gundersen 2014-03-30 20:33:57 +02:00
parent d454a6748c
commit 6e34949d72
1 changed files with 5 additions and 0 deletions
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5
src/libsystemd-network/dhcp-packet.c
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@ -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);