/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * interface_output.c: interface output node * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef __INTERFACE_INLINES_H__ #define __INTERFACE_INLINES_H__ #include <vnet/vnet.h> #include <vnet/gso/hdr_offset_parser.h> static_always_inline void vnet_calc_ip4_checksums (vlib_main_t * vm, vlib_buffer_t * b, ip4_header_t * ip4, tcp_header_t * th, udp_header_t * uh) { if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM) ip4->checksum = ip4_header_checksum (ip4); if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) { th->checksum = 0; th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4); } if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) { uh->checksum = 0; uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4); } } static_always_inline void vnet_calc_ip6_checksums (vlib_main_t * vm, vlib_buffer_t * b, ip6_header_t * ip6, tcp_header_t * th, udp_header_t * uh) { int bogus; if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) { th->checksum = 0; th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); } if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) { uh->checksum = 0; uh->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); } } static_always_inline void vnet_calc_checksums_inline (vlib_main_t * vm, vlib_buffer_t * b, int is_ip4, int is_ip6, int with_gso) { ip4_header_t *ip4; ip6_header_t *ip6; tcp_header_t *th; udp_header_t *uh; if (with_gso) { generic_header_offset_t gho = { 0 }; vnet_generic_header_offset_parser (b, &gho, 1 /* l2 */ , is_ip4, is_ip6); ASSERT (gho.gho_flags ^ (GHO_F_IP4 | GHO_F_IP6)); vnet_get_inner_header (b, &gho); ip4 = (ip4_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset); ip6 = (ip6_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset); th = (tcp_header_t *) (vlib_buffer_get_current (b) + gho.l4_hdr_offset); uh = (udp_header_t *) (vlib_buffer_get_current (b) + gho.l4_hdr_offset); if (gho.gho_flags & GHO_F_IP4) { vnet_calc_ip4_checksums (vm, b, ip4, th, uh); } else if (gho.gho_flags & GHO_F_IP6) { vnet_calc_ip6_checksums (vm, b, ip6, th, uh); } vnet_get_outer_header (b, &gho); } else { ASSERT (!(is_ip4 && is_ip6)); ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset); uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset); if (is_ip4) { vnet_calc_ip4_checksums (vm, b, ip4, th, uh); } if (is_ip6) { vnet_calc_ip6_checksums (vm, b, ip6, th, uh); } } b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM; b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM; } #endif /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */