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Vector Packet Processing
interface_output.h
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1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  * interface_output.c: interface output node
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39 
40 #ifndef __INTERFACE_INLINES_H__
41 #define __INTERFACE_INLINES_H__
42 
43 #include <vnet/vnet.h>
44 
47  tcp_header_t *th, udp_header_t *uh,
48  vnet_buffer_oflags_t oflags)
49 {
50  if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
51  ip4->checksum = ip4_header_checksum (ip4);
52  if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
53  {
54  th->checksum = 0;
55  th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
56  }
57  if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
58  {
59  uh->checksum = 0;
61  }
62 }
63 
66  tcp_header_t *th, udp_header_t *uh,
67  vnet_buffer_oflags_t oflags)
68 {
69  int bogus;
70  if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
71  {
72  th->checksum = 0;
73  th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
74  }
75  if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
76  {
77  uh->checksum = 0;
79  }
80 }
81 
84  int is_ip4, int is_ip6)
85 {
88  tcp_header_t *th;
89  udp_header_t *uh;
90  vnet_buffer_oflags_t oflags;
91 
92  if (!(b->flags & VNET_BUFFER_F_OFFLOAD))
93  return;
94 
95  ASSERT (!(is_ip4 && is_ip6));
96 
97  ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
98  ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
99  th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
100  uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
101  oflags = vnet_buffer (b)->oflags;
102 
103  if (is_ip4)
104  {
105  vnet_calc_ip4_checksums (vm, b, ip4, th, uh, oflags);
106  }
107  else if (is_ip6)
108  {
109  vnet_calc_ip6_checksums (vm, b, ip6, th, uh, oflags);
110  }
111 
112  vnet_buffer_offload_flags_clear (b, (VNET_BUFFER_OFFLOAD_F_IP_CKSUM |
113  VNET_BUFFER_OFFLOAD_F_UDP_CKSUM |
114  VNET_BUFFER_OFFLOAD_F_TCP_CKSUM));
115 }
116 
117 #endif
118 
119 /*
120  * fd.io coding-style-patch-verification: ON
121  *
122  * Local Variables:
123  * eval: (c-set-style "gnu")
124  * End:
125  */
ip6_tcp_udp_icmp_compute_checksum
u16 ip6_tcp_udp_icmp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip6_header_t *ip0, int *bogus_lengthp)
Definition: ip6_forward.c:1096
ip4
vl_api_ip4_address_t ip4
Definition: one.api:376
tcp_header_t
struct _tcp_header tcp_header_t
vnet_buffer_oflags_t
vnet_buffer_oflags_t
Definition: buffer.h:119
vm
vlib_main_t * vm
X-connect all packets from the HOST to the PHY.
Definition: nat44_ei.c:3047
vnet_calc_checksums_inline
static_always_inline void vnet_calc_checksums_inline(vlib_main_t *vm, vlib_buffer_t *b, int is_ip4, int is_ip6)
Definition: interface_output.h:83
udp_header_t
Definition: udp_packet.h:45
ip4_header_t
Definition: ip4_packet.h:87
vnet_calc_ip6_checksums
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)
Definition: interface_output.h:65
vnet_buffer
#define vnet_buffer(b)
Definition: buffer.h:441
vnet_buffer_offload_flags_clear
static_always_inline void vnet_buffer_offload_flags_clear(vlib_buffer_t *b, vnet_buffer_oflags_t oflags)
Definition: buffer.h:544
ip4_tcp_udp_compute_checksum
u16 ip4_tcp_udp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip4_header_t *ip0)
Definition: pnat_test_stubs.h:59
static_always_inline
#define static_always_inline
Definition: clib.h:112
udp_header_t::checksum
u16 checksum
Definition: udp_packet.h:55
is_ip6
bool is_ip6
Definition: ip.api:43
ASSERT
#define ASSERT(truth)
Definition: error_bootstrap.h:69
ip6
vl_api_ip6_address_t ip6
Definition: one.api:424
ip6_header_t
Definition: ip6_packet.h:294
vlib_main_t
Definition: main.h:102
b
vlib_buffer_t ** b
Definition: nat44_ei_out2in.c:717
ip4_header_checksum
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:314
vnet_calc_ip4_checksums
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)
Definition: interface_output.h:46
vlib_buffer_t::data
u8 data[]
Packet data.
Definition: buffer.h:204
vnet.h
vlib_buffer_t::flags
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index,...
Definition: buffer.h:133
vlib_buffer_t
VLIB buffer representation.
Definition: buffer.h:111