698eb87a8e
VXLAN uses csum_offload for IPv6 packets. But without gso node we have csum calculated only for inner packet. This patch adds support for outer header csum calculation. Checksum for inner packet should be calculated before interface-output node (for example in vxlan node). Type: fix Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com> Signed-off-by: Vladimir Isaev <visaev@netgate.com> Change-Id: Ica68429ede4426293769207cd83c791ebe72fe56
122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/*
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* Copyright (c) 2015 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* interface_output.c: interface output node
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*
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* Copyright (c) 2008 Eliot Dresselhaus
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __INTERFACE_INLINES_H__
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#define __INTERFACE_INLINES_H__
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#include <vnet/vnet.h>
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#include <vnet/gso/hdr_offset_parser.h>
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static_always_inline void
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vnet_calc_ip4_checksums (vlib_main_t * vm, vlib_buffer_t * b,
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ip4_header_t * ip4, tcp_header_t * th,
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udp_header_t * uh)
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{
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if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
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ip4->checksum = ip4_header_checksum (ip4);
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if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
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{
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th->checksum = 0;
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th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
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}
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if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
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{
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uh->checksum = 0;
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uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
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}
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}
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static_always_inline void
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vnet_calc_ip6_checksums (vlib_main_t * vm, vlib_buffer_t * b,
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ip6_header_t * ip6, tcp_header_t * th,
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udp_header_t * uh)
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{
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int bogus;
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if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
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{
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th->checksum = 0;
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th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
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}
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if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
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{
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uh->checksum = 0;
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uh->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
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}
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}
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static_always_inline void
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vnet_calc_checksums_inline (vlib_main_t * vm, vlib_buffer_t * b,
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int is_ip4, int is_ip6)
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{
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ip4_header_t *ip4;
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ip6_header_t *ip6;
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tcp_header_t *th;
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udp_header_t *uh;
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ASSERT (!(is_ip4 && is_ip6));
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ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
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ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
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th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
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uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
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if (is_ip4)
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{
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vnet_calc_ip4_checksums (vm, b, ip4, th, uh);
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}
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else if (is_ip6)
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{
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vnet_calc_ip6_checksums (vm, b, ip6, th, uh);
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}
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b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
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b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
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b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
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}
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#endif
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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