/* * 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. */ #ifndef __AH_H__ #define __AH_H__ #include <vnet/ip/ip.h> #include <vnet/ipsec/ipsec.h> typedef struct { unsigned char nexthdr; unsigned char hdrlen; unsigned short reserved; unsigned int spi; unsigned int seq_no; unsigned char auth_data[0]; } ah_header_t; /* *INDENT-OFF* */ typedef CLIB_PACKED (struct { ip4_header_t ip4; ah_header_t ah; }) ip4_and_ah_header_t; /* *INDENT-ON* */ /* *INDENT-OFF* */ typedef CLIB_PACKED (struct { ip6_header_t ip6; ah_header_t ah; }) ip6_and_ah_header_t; /* *INDENT-ON* */ always_inline u8 ah_calc_icv_padding_len (u8 icv_size, int is_ipv6) { ASSERT (0 == is_ipv6 || 1 == is_ipv6); const u8 req_multiple = 4 + 4 * is_ipv6; // 4 for ipv4, 8 for ipv6 const u8 total_size = sizeof (ah_header_t) + icv_size; return (req_multiple - total_size % req_multiple) % req_multiple; } #endif /* __AH_H__ */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */