1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* 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))
{
if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
{
vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip4 - b->data;
vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_TNL_IPIP |
VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM);
}
else
{
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);
if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
{
vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip4 - b->data;
vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_TNL_IPIP |
VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM);
}
else
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
|
