0b6a857d85
Type: fix if the packet is about to be fragmented, then don't call any of the actions that expect the rewrite to have been written. 1) don't double count packets thru the adjacency (original & fragments) 2) don't double decrement the TTL for fragments 3) return to ip4-midchain post ip-frag if that's where we started. 4) only run midchain/mcast fixups if not fragmenting (if no errors) Change-Id: Ib2866787a42713ee5871b87b597d8f74b901044b Signed-off-by: Neale Ranns <nranns@cisco.com>
109 lines
3.4 KiB
C
109 lines
3.4 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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static_always_inline void
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calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
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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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int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0;
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int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0;
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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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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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if (is_ip6)
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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 =
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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 =
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ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
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}
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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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