diff options
| author | Tom Gundersen <teg@jklm.no> | 2014-02-24 01:09:21 +0100 |
|---|---|---|
| committer | Tom Gundersen <teg@jklm.no> | 2014-02-24 03:28:19 +0100 |
| commit | 55dab2ed837c17236b7df12decaffbc4388d1dff (patch) | |
| tree | 44b39f61128131327baf3311277d4694311b7446 /src/libsystemd-dhcp/dhcp-packet.c | |
| parent | 872c2ab3e2887c1c2b6c9815a201683e246e56fc (diff) | |
sd-dhcp-client: respect TP_STATUS_CSUMNOTREADY
If an UDP packet has not passed through a hardware device, its checksum may not
have been computed. This is exposed through the TP_STATUS_CSUMNOTREADY sockopt.
When using raw sockets, skip checksum validation when TP_STATUS_CSUMNOTREADY
is set.
This is necessary for dhcp to work directly over a veth tunnel, e.g. as done
in systemd-nspawn.
Diffstat (limited to 'src/libsystemd-dhcp/dhcp-packet.c')
| -rw-r--r-- | src/libsystemd-dhcp/dhcp-packet.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libsystemd-dhcp/dhcp-packet.c b/src/libsystemd-dhcp/dhcp-packet.c index 1937de4252..8388e56222 100644 --- a/src/libsystemd-dhcp/dhcp-packet.c +++ b/src/libsystemd-dhcp/dhcp-packet.c @@ -113,7 +113,7 @@ void dhcp_packet_append_ip_headers(DHCPPacket *packet, uint16_t len) { packet->ip.check = dhcp_checksum(&packet->ip, DHCP_IP_SIZE); } -int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len) { +int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len, bool checksum) { size_t hdrlen; assert(packet); @@ -168,7 +168,7 @@ int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len) { return -EINVAL; } - if (packet->udp.check) { + if (checksum && packet->udp.check) { packet->ip.check = packet->udp.len; packet->ip.ttl = 0; |