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/*
* 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:
*/
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