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Fix lisp udp checksum

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Change-Id: I16c3f5a97c45e504eec94ce131e854d7da9cd0e3
Signed-off-by: Florin Coras <fcoras@cisco.com>
This commit is contained in:
Florin Coras
2017-07-25 11:35:44 -07:00
committed by Damjan Marion
parent 30af5da752
commit 7c35f191eb
1 changed files with 18 additions and 6 deletions
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24
src/vnet/lisp-cp/packets.c
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@ -167,6 +167,8 @@ pkt_push_ip (vlib_main_t * vm, vlib_buffer_t * b, ip_address_t * src,
return 0;
}
#define UDP_CHECKSUM_OFFLOAD 1
void *
pkt_push_udp_and_ip (vlib_main_t * vm, vlib_buffer_t * b, u16 sp, u16 dp,
ip_address_t * sip, ip_address_t * dip)
@ -179,14 +181,24 @@ pkt_push_udp_and_ip (vlib_main_t * vm, vlib_buffer_t * b, u16 sp, u16 dp,
ih = pkt_push_ip (vm, b, sip, dip, IP_PROTOCOL_UDP);
udpsum = udp_checksum (uh, clib_net_to_host_u16 (uh->length), ih,
ip_addr_version (sip));
if (udpsum == (u16) ~ 0)
if (UDP_CHECKSUM_OFFLOAD)
{
clib_warning ("Failed UDP checksum! Discarding");
return 0;
b->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
vnet_buffer (b)->l3_hdr_offset = (u8 *) ih - b->data;
vnet_buffer (b)->l4_hdr_offset = (u8 *) uh - b->data;
uh->checksum = 0;
}
else
{
udpsum = udp_checksum (uh, clib_net_to_host_u16 (uh->length), ih,
ip_addr_version (sip));
if (udpsum == (u16) ~ 0)
{
clib_warning ("Failed UDP checksum! Discarding");
return 0;
}
uh->checksum = udpsum;
}
uh->checksum = udpsum;
return ih;
}