diff options
| -rw-r--r-- | src/vnet/lisp-cp/packets.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/vnet/lisp-cp/packets.c b/src/vnet/lisp-cp/packets.c index f24024f1500..a3d6f1cdf06 100644 --- a/src/vnet/lisp-cp/packets.c +++ b/src/vnet/lisp-cp/packets.c @@ -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; } |