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Vector Packet Processing
af_packet_api.c
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1 /*
2  *------------------------------------------------------------------
3  * af_packet_api.c - af-packet api
4  *
5  * Copyright (c) 2016 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 
20 #include <vnet/vnet.h>
21 #include <vlibmemory/api.h>
22 
23 #include <vnet/interface.h>
24 #include <vnet/api_errno.h>
26 
27 #include <vnet/vnet_msg_enum.h>
28 
29 #define vl_typedefs /* define message structures */
30 #include <vnet/vnet_all_api_h.h>
31 #undef vl_typedefs
32 
33 #define vl_endianfun /* define message structures */
34 #include <vnet/vnet_all_api_h.h>
35 #undef vl_endianfun
36 
37 /* instantiate all the print functions we know about */
38 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
39 #define vl_printfun
40 #include <vnet/vnet_all_api_h.h>
41 #undef vl_printfun
42 
44 
45 #define foreach_vpe_api_msg \
46 _(AF_PACKET_CREATE, af_packet_create) \
47 _(AF_PACKET_DELETE, af_packet_delete)
48 
49 static void
51 {
54  int rv = 0;
55  u8 *host_if_name = NULL;
56  u32 sw_if_index;
57 
58  host_if_name = format (0, "%s", mp->host_if_name);
59  vec_add1 (host_if_name, 0);
60 
61  rv = af_packet_create_if (vm, host_if_name,
62  mp->use_random_hw_addr ? 0 : mp->hw_addr,
63  &sw_if_index);
64 
65  vec_free (host_if_name);
66 
67  /* *INDENT-OFF* */
68  REPLY_MACRO2(VL_API_AF_PACKET_CREATE_REPLY,
69  ({
70  rmp->sw_if_index = clib_host_to_net_u32(sw_if_index);
71  }));
72  /* *INDENT-ON* */
73 }
74 
75 static void
77 {
80  int rv = 0;
81  u8 *host_if_name = NULL;
82 
83  host_if_name = format (0, "%s", mp->host_if_name);
84  vec_add1 (host_if_name, 0);
85 
86  rv = af_packet_delete_if (vm, host_if_name);
87 
88  vec_free (host_if_name);
89 
90  REPLY_MACRO (VL_API_AF_PACKET_DELETE_REPLY);
91 }
92 
93 /*
94  * af_packet_api_hookup
95  * Add vpe's API message handlers to the table.
96  * vlib has alread mapped shared memory and
97  * added the client registration handlers.
98  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
99  */
100 #define vl_msg_name_crc_list
101 #include <vnet/vnet_all_api_h.h>
102 #undef vl_msg_name_crc_list
103 
104 static void
106 {
107 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
108  foreach_vl_msg_name_crc_af_packet;
109 #undef _
110 }
111 
112 static clib_error_t *
114 {
115  api_main_t *am = &api_main;
116 
117 #define _(N,n) \
118  vl_msg_api_set_handlers(VL_API_##N, #n, \
119  vl_api_##n##_t_handler, \
120  vl_noop_handler, \
121  vl_api_##n##_t_endian, \
122  vl_api_##n##_t_print, \
123  sizeof(vl_api_##n##_t), 1);
125 #undef _
126 
127  /*
128  * Set up the (msg_name, crc, message-id) table
129  */
131 
132  return 0;
133 }
134 
136 
137 /*
138  * fd.io coding-style-patch-verification: ON
139  *
140  * Local Variables:
141  * eval: (c-set-style "gnu")
142  * End:
143  */
static void vl_api_af_packet_create_t_handler(vl_api_af_packet_create_t *mp)
Definition: af_packet_api.c:50
#define REPLY_MACRO2(t, body)
#define NULL
Definition: clib.h:55
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
api_main_t api_main
Definition: api_shared.c:35
#define foreach_vpe_api_msg
Definition: af_packet_api.c:45
Create host-interface response.
Definition: af_packet.api:37
Delete host-interface.
Definition: af_packet.api:49
#define REPLY_MACRO(t)
Create host-interface.
Definition: af_packet.api:23
vlib_main_t * vm
Definition: buffer.c:276
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:340
Delete host-interface response.
Definition: af_packet.api:61
VLIB_API_INIT_FUNCTION(af_packet_api_hookup)
unsigned int u32
Definition: types.h:88
static void setup_message_id_table(api_main_t *am)
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
unsigned char u8
Definition: types.h:56
static void vl_api_af_packet_delete_t_handler(vl_api_af_packet_delete_t *mp)
Definition: af_packet_api.c:76
static clib_error_t * af_packet_api_hookup(vlib_main_t *vm)
int af_packet_create_if(vlib_main_t *vm, u8 *host_if_name, u8 *hw_addr_set, u32 *sw_if_index)
Definition: af_packet.c:176
int af_packet_delete_if(vlib_main_t *vm, u8 *host_if_name)
Definition: af_packet.c:299