diff options
| author | Umut Tezduyar Lindskog <umut.tezduyar@axis.com> | 2014-03-30 19:09:14 +0200 |
|---|---|---|
| committer | Tom Gundersen <teg@jklm.no> | 2014-03-30 20:46:20 +0200 |
| commit | d454a6748c34f0f67eef618238e0a64b80c85303 (patch) | |
| tree | 182c702147940746343ab63d68e983d1b439df03 /src/libsystemd-network/dhcp-packet.c | |
| parent | 3cbbb3e6787ad002cae3e1c80179af7d4d6cf9e7 (diff) | |
sd-dhcp: check for udp packets
Do not try to parse ICMP packets
[tomegun: slightly tweaked debug message]
Diffstat (limited to 'src/libsystemd-network/dhcp-packet.c')
| -rw-r--r-- | src/libsystemd-network/dhcp-packet.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libsystemd-network/dhcp-packet.c b/src/libsystemd-network/dhcp-packet.c index bed942fd84..9779cbd51d 100644 --- a/src/libsystemd-network/dhcp-packet.c +++ b/src/libsystemd-network/dhcp-packet.c @@ -157,6 +157,11 @@ int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len, bool checksum) { /* UDP */ + if (packet->ip.protocol != IPPROTO_UDP) { + log_dhcp_client(client, "ignoring packet: not UDP"); + return -EINVAL; + } + if (len < DHCP_IP_UDP_SIZE) { log_dhcp_client(client, "ignoring packet: packet (%zu bytes) " " smaller than IP+UDP header (%u bytes)", len, |