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/*
* 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>
#include <vnet/ip/ip4_inlines.h>
#include <vnet/ip/ip6_inlines.h>
#include <vnet/mpls/mpls_lookup.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,
vnet_link_t lt)
{
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);
if (PREDICT_FALSE(adj->rewrite_header.flags &
VNET_REWRITE_FIXUP_FLOW_HASH))
{
if (VNET_LINK_IP4 == lt)
vnet_buffer (b)->ip.flow_hash =
ip4_compute_flow_hash (vlib_buffer_get_current (b) + adj->rewrite_header.data_bytes,
IP_FLOW_HASH_DEFAULT);
else if (VNET_LINK_IP6 == lt)
vnet_buffer (b)->ip.flow_hash =
ip6_compute_flow_hash (vlib_buffer_get_current (b) + adj->rewrite_header.data_bytes,
IP_FLOW_HASH_DEFAULT);
else if (VNET_LINK_MPLS == lt)
vnet_buffer (b)->ip.flow_hash =
mpls_compute_flow_hash (vlib_buffer_get_current (b) + adj->rewrite_header.data_bytes,
IP_FLOW_HASH_DEFAULT);
}
}
#endif
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