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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* Copyright (c) 2015 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.
*/
/*
* interface_output.c: interface output node
*
* Copyright (c) 2008 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __INTERFACE_INLINES_H__
#define __INTERFACE_INLINES_H__
#include <vnet/vnet.h>
#include <vnet/tcp/tcp_packet.h>
static_always_inline void
vnet_calc_ip4_checksums (vlib_main_t *vm, vlib_buffer_t *b, ip4_header_t *ip4,
tcp_header_t *th, udp_header_t *uh,
vnet_buffer_oflags_t oflags)
{
if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
ip4->checksum = ip4_header_checksum (ip4);
if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
{
th->checksum = 0;
th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
}
if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
{
uh->checksum = 0;
uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
}
}
static_always_inline void
vnet_calc_ip6_checksums (vlib_main_t *vm, vlib_buffer_t *b, ip6_header_t *ip6,
tcp_header_t *th, udp_header_t *uh,
vnet_buffer_oflags_t oflags)
{
int bogus;
if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
{
th->checksum = 0;
th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
}
if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
{
uh->checksum = 0;
uh->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
}
}
static_always_inline void
vnet_calc_checksums_inline (vlib_main_t * vm, vlib_buffer_t * b,
int is_ip4, int is_ip6)
{
ip4_header_t *ip4;
ip6_header_t *ip6;
tcp_header_t *th;
udp_header_t *uh;
vnet_buffer_oflags_t oflags;
if (!(b->flags & VNET_BUFFER_F_OFFLOAD))
return;
ASSERT (!(is_ip4 && is_ip6));
ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
oflags = vnet_buffer (b)->oflags;
if (is_ip4)
{
vnet_calc_ip4_checksums (vm, b, ip4, th, uh, oflags);
}
else if (is_ip6)
{
vnet_calc_ip6_checksums (vm, b, ip6, th, uh, oflags);
}
vnet_buffer_offload_flags_clear (b, (VNET_BUFFER_OFFLOAD_F_IP_CKSUM |
VNET_BUFFER_OFFLOAD_F_UDP_CKSUM |
VNET_BUFFER_OFFLOAD_F_TCP_CKSUM));
}
static_always_inline void
vnet_calc_outer_checksums_inline (vlib_main_t *vm, vlib_buffer_t *b)
{
if (!(b->flags & VNET_BUFFER_F_OFFLOAD))
return;
vnet_buffer_oflags_t oflags = vnet_buffer (b)->oflags;
if (oflags & VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM)
{
ip4_header_t *ip4;
ip4 = (ip4_header_t *) (b->data + vnet_buffer2 (b)->outer_l3_hdr_offset);
ip4->checksum = ip4_header_checksum (ip4);
vnet_buffer_offload_flags_clear (b,
VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM);
}
else if (oflags & VNET_BUFFER_OFFLOAD_F_OUTER_UDP_CKSUM)
{
int bogus;
ip6_header_t *ip6;
udp_header_t *uh;
ip6 = (ip6_header_t *) (b->data + vnet_buffer2 (b)->outer_l3_hdr_offset);
uh = (udp_header_t *) (b->data + vnet_buffer2 (b)->outer_l4_hdr_offset);
uh->checksum = 0;
uh->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
vnet_buffer_offload_flags_clear (b,
VNET_BUFFER_OFFLOAD_F_OUTER_UDP_CKSUM);
}
}
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
