/* * tunnel_dp.h: data-plane functions tunnels. * * Copyright (c) 2019 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 __TUNNEL_DP_H__ #define __TUNNEL_DP_H__ #include <vnet/tunnel/tunnel.h> #include <vnet/mpls/mpls_lookup.h> static_always_inline void tunnel_encap_fixup_4o4 (tunnel_encap_decap_flags_t flags, const ip4_header_t * inner, ip4_header_t * outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)) ip4_header_set_dscp (outer, ip4_header_get_dscp (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)) ip4_header_set_ecn (outer, ip4_header_get_ecn (inner)); if (PREDICT_FALSE ((flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DF) && ip4_header_get_df (inner))) ip4_header_set_df (outer); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_HOP_LIMIT)) ip4_header_set_ttl (outer, ip4_header_get_ttl (inner)); } static_always_inline void tunnel_encap_fixup_4o4_w_chksum (tunnel_encap_decap_flags_t flags, const ip4_header_t * inner, ip4_header_t * outer) { if (PREDICT_FALSE (flags & (TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP | TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN))) { ip_csum_t sum = outer->checksum; u8 tos = outer->tos; if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP) ip4_header_set_dscp (outer, ip4_header_get_dscp (inner)); if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN) ip4_header_set_ecn (outer, ip4_header_get_ecn (inner)); sum = ip_csum_update (outer->checksum, tos, outer->tos, ip4_header_t, tos); outer->checksum = ip_csum_fold (sum); } if (PREDICT_FALSE ((flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DF) && ip4_header_get_df (inner))) { ip_csum_t sum = outer->checksum; u16 tos = outer->flags_and_fragment_offset; ip4_header_set_df (outer); sum = ip_csum_update (outer->checksum, tos, outer->tos, ip4_header_t, flags_and_fragment_offset); outer->checksum = ip_csum_fold (sum); } } static_always_inline void tunnel_encap_fixup_mplso4_w_chksum (tunnel_encap_decap_flags_t flags, const mpls_unicast_header_t *inner, ip4_header_t *outer) { if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP) { ip_csum_t sum = outer->checksum; u8 tos = outer->tos; if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP) ip4_header_set_dscp (outer, vnet_mpls_uc_get_exp (inner->label_exp_s_ttl)); sum = ip_csum_update (outer->checksum, tos, outer->tos, ip4_header_t, tos); outer->checksum = ip_csum_fold (sum); } } static_always_inline void tunnel_encap_fixup_6o4 (tunnel_encap_decap_flags_t flags, const ip6_header_t * inner, ip4_header_t * outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)) ip4_header_set_dscp (outer, ip6_dscp_network_order (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)) ip4_header_set_ecn (outer, ip6_ecn_network_order ((inner))); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_HOP_LIMIT)) ip4_header_set_ttl (outer, ip6_hop_limit_network_order (inner)); } static_always_inline void tunnel_encap_fixup_6o4_w_chksum (tunnel_encap_decap_flags_t flags, const ip6_header_t * inner, ip4_header_t * outer) { if (PREDICT_FALSE (flags & (TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP | TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN))) { ip_csum_t sum = outer->checksum; u8 tos = outer->tos; if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP) ip4_header_set_dscp (outer, ip6_dscp_network_order (inner)); if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN) ip4_header_set_ecn (outer, ip6_ecn_network_order ((inner))); sum = ip_csum_update (outer->checksum, tos, outer->tos, ip4_header_t, tos); outer->checksum = ip_csum_fold (sum); } } static_always_inline void tunnel_encap_fixup_6o6 (tunnel_encap_decap_flags_t flags, const ip6_header_t * inner, ip6_header_t * outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)) ip6_set_dscp_network_order (outer, ip6_dscp_network_order (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)) ip6_set_ecn_network_order (outer, ip6_ecn_network_order (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_FLOW_LABEL)) ip6_set_flow_label_network_order (outer, ip6_flow_label_network_order (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_HOP_LIMIT)) ip6_set_hop_limit_network_order (outer, ip6_hop_limit_network_order (inner)); } static_always_inline void tunnel_encap_fixup_4o6 (tunnel_encap_decap_flags_t flags, const vlib_buffer_t *b, const ip4_header_t *inner, ip6_header_t *outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)) ip6_set_dscp_network_order (outer, ip4_header_get_dscp (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)) ip6_set_ecn_network_order (outer, ip4_header_get_ecn (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_HOP_LIMIT)) ip6_set_hop_limit_network_order (outer, ip4_header_get_ttl (inner)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_FLOW_LABEL)) ip6_set_flow_label_network_order ( outer, (0 != vnet_buffer (b)->ip.flow_hash ? vnet_buffer (b)->ip.flow_hash : ip4_compute_flow_hash (inner, IP_FLOW_HASH_DEFAULT))); } static_always_inline void tunnel_encap_fixup_mplso6 (tunnel_encap_decap_flags_t flags, const vlib_buffer_t *b, const mpls_unicast_header_t *inner, ip6_header_t *outer) { if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP) ip6_set_dscp_network_order (outer, vnet_mpls_uc_get_exp (inner->label_exp_s_ttl)); if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_FLOW_LABEL)) ip6_set_flow_label_network_order ( outer, (0 != vnet_buffer (b)->ip.flow_hash ? vnet_buffer (b)->ip.flow_hash : mpls_compute_flow_hash (inner, IP_FLOW_HASH_DEFAULT))); } static_always_inline void tunnel_encap_fixup_mplso4 (tunnel_encap_decap_flags_t flags, const mpls_unicast_header_t *inner, ip4_header_t *outer) { if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP) ip4_header_set_dscp (outer, vnet_mpls_uc_get_exp (inner->label_exp_s_ttl)); } static_always_inline void tunnel_decap_fixup_4o6 (tunnel_encap_decap_flags_t flags, ip4_header_t * inner, const ip6_header_t * outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)) ip4_header_set_ecn_w_chksum (inner, ip6_ecn_network_order (outer)); } static_always_inline void tunnel_decap_fixup_6o6 (tunnel_encap_decap_flags_t flags, ip6_header_t * inner, const ip6_header_t * outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)) ip6_set_ecn_network_order (inner, ip6_ecn_network_order (outer)); } static_always_inline void tunnel_decap_fixup_6o4 (tunnel_encap_decap_flags_t flags, ip6_header_t * inner, const ip4_header_t * outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)) ip6_set_ecn_network_order (inner, ip4_header_get_ecn (outer)); } static_always_inline void tunnel_decap_fixup_4o4 (tunnel_encap_decap_flags_t flags, ip4_header_t * inner, const ip4_header_t * outer) { if (PREDICT_FALSE (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)) ip4_header_set_ecn_w_chksum (inner, ip4_header_get_ecn (outer)); } static_always_inline void tunnel_decap_fixup_mplso6 (tunnel_encap_decap_flags_t flags, mpls_unicast_header_t *inner, const ip6_header_t *outer) { } static_always_inline void tunnel_decap_fixup_mplso4 (tunnel_encap_decap_flags_t flags, mpls_unicast_header_t *inner, const ip4_header_t *outer) { } #endif /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */