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| author | Siddharth Chandrasekara <csiddharth@vmware.com> | 2019-09-23 13:25:21 +0200 |
|---|---|---|
| committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2019-09-26 04:39:46 +0200 |
| commit | afe42aef39d027a8c74e0f5dd1e496b8de5daa95 (patch) | |
| tree | cc647def939c26d3adf3632f336d3a4d8bf8258c /src/libsystemd-network/dhcp-packet.c | |
| parent | network: drop noisy log message (diff) | |
| download | systemd-afe42aef39d027a8c74e0f5dd1e496b8de5daa95.tar.xz systemd-afe42aef39d027a8c74e0f5dd1e496b8de5daa95.zip | |
dhcp4: make IPServiceType configurable
IPServiceType set to CS6 (network control) causes problems on some old
network setups that continue to interpret the field as IP TOS.
Make DHCP work on such networks by allowing this field to be set to
CS4 (Realtime) instead, as this maps to IPTOS_LOWDELAY.
Signed-off-by: Siddharth Chandrasekaran <csiddharth@vmware.com>
Diffstat (limited to 'src/libsystemd-network/dhcp-packet.c')
| -rw-r--r-- | src/libsystemd-network/dhcp-packet.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/libsystemd-network/dhcp-packet.c b/src/libsystemd-network/dhcp-packet.c index ad5f8e267a..fe7d51703b 100644 --- a/src/libsystemd-network/dhcp-packet.c +++ b/src/libsystemd-network/dhcp-packet.c @@ -75,12 +75,15 @@ uint16_t dhcp_packet_checksum(uint8_t *buf, size_t len) { void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr, uint16_t source_port, be32_t destination_addr, - uint16_t destination_port, uint16_t len) { + uint16_t destination_port, uint16_t len, int ip_service_type) { packet->ip.version = IPVERSION; packet->ip.ihl = DHCP_IP_SIZE / 4; packet->ip.tot_len = htobe16(len); - packet->ip.tos = IPTOS_CLASS_CS6; + if (ip_service_type >= 0) + packet->ip.tos = ip_service_type; + else + packet->ip.tos = IPTOS_CLASS_CS6; packet->ip.protocol = IPPROTO_UDP; packet->ip.saddr = source_addr; |