/* * Copyright (c) 2016 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 __ADJ_DP_H__ #define __ADJ_DP_H__ #include <vnet/adj/adj.h> #include <vnet/tunnel/tunnel_dp.h> static_always_inline void adj_midchain_ipip44_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b) { tunnel_encap_decap_flags_t flags; ip4_header_t *ip4; flags = pointer_to_uword (adj->sub_type.midchain.fixup_data); ip4 = vlib_buffer_get_current (b); ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b)); if (PREDICT_TRUE(TUNNEL_ENCAP_DECAP_FLAG_NONE == flags)) { ip_csum_t sum; u16 old,new; old = 0; new = ip4->length; sum = ip4->checksum; sum = ip_csum_update (sum, old, new, ip4_header_t, length); ip4->checksum = ip_csum_fold (sum); } else { tunnel_encap_fixup_4o4 (flags, ip4 + 1, ip4); ip4->checksum = ip4_header_checksum (ip4); } } static_always_inline void adj_midchain_fixup (vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t * b) { if (PREDICT_TRUE(adj->rewrite_header.flags & VNET_REWRITE_FIXUP_IP4_O_4)) adj_midchain_ipip44_fixup (vm, adj, b); else if (adj->sub_type.midchain.fixup_func) adj->sub_type.midchain.fixup_func (vm, adj, b, adj->sub_type.midchain.fixup_data); } #endif