FD.io VPP  v21.01.1
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 _(AF_PACKET_SET_L4_CKSUM_OFFLOAD, af_packet_set_l4_cksum_offload) \
49 _(AF_PACKET_DUMP, af_packet_dump)
50 
51 static void
53 {
56  int rv = 0;
57  u8 *host_if_name = NULL;
59 
60  host_if_name = format (0, "%s", mp->host_if_name);
61  vec_add1 (host_if_name, 0);
62 
63  rv = af_packet_create_if (vm, host_if_name,
64  mp->use_random_hw_addr ? 0 : mp->hw_addr,
65  &sw_if_index);
66 
67  vec_free (host_if_name);
68 
69  /* *INDENT-OFF* */
70  REPLY_MACRO2(VL_API_AF_PACKET_CREATE_REPLY,
71  ({
72  rmp->sw_if_index = clib_host_to_net_u32(sw_if_index);
73  }));
74  /* *INDENT-ON* */
75 }
76 
77 static void
79 {
81  vl_api_af_packet_delete_reply_t *rmp;
82  int rv = 0;
83  u8 *host_if_name = NULL;
84 
85  host_if_name = format (0, "%s", mp->host_if_name);
86  vec_add1 (host_if_name, 0);
87 
88  rv = af_packet_delete_if (vm, host_if_name);
89 
90  vec_free (host_if_name);
91 
92  REPLY_MACRO (VL_API_AF_PACKET_DELETE_REPLY);
93 }
94 
95 static void
98 {
100  vl_api_af_packet_delete_reply_t *rmp;
101  int rv = 0;
102 
103  rv = af_packet_set_l4_cksum_offload (vm, ntohl (mp->sw_if_index), mp->set);
104  REPLY_MACRO (VL_API_AF_PACKET_SET_L4_CKSUM_OFFLOAD_REPLY);
105 }
106 
107 static void
109  vl_api_registration_t * reg,
110  af_packet_if_detail_t * af_packet_if, u32 context)
111 {
113  mp = vl_msg_api_alloc (sizeof (*mp));
114  clib_memset (mp, 0, sizeof (*mp));
115  mp->_vl_msg_id = htons (VL_API_AF_PACKET_DETAILS);
116  mp->sw_if_index = htonl (af_packet_if->sw_if_index);
117  clib_memcpy (mp->host_if_name, af_packet_if->host_if_name,
118  MIN (ARRAY_LEN (mp->host_if_name) - 1,
119  strlen ((const char *) af_packet_if->host_if_name)));
120 
121  mp->context = context;
122  vl_api_send_msg (reg, (u8 *) mp);
123 }
124 
125 
126 static void
128 {
129  int rv;
132  af_packet_if_detail_t *out_af_packet_ifs = NULL;
133  af_packet_if_detail_t *af_packet_if = NULL;
134 
136  if (!reg)
137  return;
138 
139  rv = af_packet_dump_ifs (&out_af_packet_ifs);
140  if (rv)
141  return;
142 
143  vec_foreach (af_packet_if, out_af_packet_ifs)
144  {
145  af_packet_send_details (am, reg, af_packet_if, mp->context);
146  }
147 
148  vec_free (out_af_packet_ifs);
149 }
150 
151 /*
152  * af_packet_api_hookup
153  * Add vpe's API message handlers to the table.
154  * vlib has already mapped shared memory and
155  * added the client registration handlers.
156  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
157  */
158 #define vl_msg_name_crc_list
159 #include <vnet/vnet_all_api_h.h>
160 #undef vl_msg_name_crc_list
161 
162 static void
164 {
165 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
166  foreach_vl_msg_name_crc_af_packet;
167 #undef _
168 }
169 
170 static clib_error_t *
172 {
173  api_main_t *am = vlibapi_get_main ();
174 
175 #define _(N,n) \
176  vl_msg_api_set_handlers(VL_API_##N, #n, \
177  vl_api_##n##_t_handler, \
178  vl_noop_handler, \
179  vl_api_##n##_t_endian, \
180  vl_api_##n##_t_print, \
181  sizeof(vl_api_##n##_t), 1);
183 #undef _
184 
185  /*
186  * Set up the (msg_name, crc, message-id) table
187  */
189 
190  return 0;
191 }
192 
194 
195 /*
196  * fd.io coding-style-patch-verification: ON
197  *
198  * Local Variables:
199  * eval: (c-set-style "gnu")
200  * End:
201  */
static void vl_api_af_packet_create_t_handler(vl_api_af_packet_create_t *mp)
Definition: af_packet_api.c:52
Set l4 offload checksum calculation.
Definition: af_packet.api:66
int af_packet_set_l4_cksum_offload(vlib_main_t *vm, u32 sw_if_index, u8 set)
Definition: af_packet.c:482
#define REPLY_MACRO2(t, body)
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
static void vl_api_send_msg(vl_api_registration_t *rp, u8 *elem)
Definition: api.h:35
Dump af_packet interfaces request.
Definition: af_packet.api:76
int af_packet_dump_ifs(af_packet_if_detail_t **out_af_packet_ifs)
Definition: af_packet.c:501
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:592
vlib_main_t * vm
Definition: in2out_ed.c:1580
vl_api_interface_index_t sw_if_index
Definition: af_packet.api:89
void * vl_msg_api_alloc(int nbytes)
unsigned char u8
Definition: types.h:56
#define clib_memcpy(d, s, n)
Definition: string.h:180
vl_api_mac_address_t hw_addr
Definition: af_packet.api:33
#define foreach_vpe_api_msg
Definition: af_packet_api.c:45
Create host-interface response.
Definition: af_packet.api:42
description fragment has unexpected format
Definition: map.api:433
vl_api_interface_index_t sw_if_index
Definition: af_packet.api:71
Delete host-interface.
Definition: af_packet.api:54
unsigned int u32
Definition: types.h:88
#define MIN(x, y)
Definition: node.h:31
Reply for af_packet dump request.
Definition: af_packet.api:86
#define REPLY_MACRO(t)
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:227
An API client registration, only in vpp/vlib.
Definition: api_common.h:47
Create host-interface.
Definition: af_packet.api:28
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:380
#define ARRAY_LEN(x)
Definition: clib.h:67
static vl_api_registration_t * vl_api_client_index_to_registration(u32 index)
Definition: api.h:79
VLIB_API_INIT_FUNCTION(af_packet_api_hookup)
static void af_packet_send_details(vpe_api_main_t *am, vl_api_registration_t *reg, af_packet_if_detail_t *af_packet_if, u32 context)
static void setup_message_id_table(api_main_t *am)
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
static void vl_api_af_packet_delete_t_handler(vl_api_af_packet_delete_t *mp)
Definition: af_packet_api.c:78
static api_main_t * vlibapi_get_main(void)
Definition: api_common.h:389
static clib_error_t * af_packet_api_hookup(vlib_main_t *vm)
#define vec_foreach(var, vec)
Vector iterator.
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:220
vl_api_interface_index_t sw_if_index
Definition: af_packet.api:46
vpe_api_main_t vpe_api_main
Definition: interface_api.c:54
static void vl_api_af_packet_set_l4_cksum_offload_t_handler(vl_api_af_packet_set_l4_cksum_offload_t *mp)
Definition: af_packet_api.c:97
static void vl_api_af_packet_dump_t_handler(vl_api_af_packet_dump_t *mp)
vl_api_interface_index_t sw_if_index
Definition: wireguard.api:34
int af_packet_delete_if(vlib_main_t *vm, u8 *host_if_name)
Definition: af_packet.c:421