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Vector Packet Processing
ipsec_gre_api.c
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1 /*
2  *------------------------------------------------------------------
3  * ipsec_gre_api.c - ipsec_gre 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 _(IPSEC_GRE_ADD_DEL_TUNNEL, ipsec_gre_add_del_tunnel) \
47 _(IPSEC_GRE_TUNNEL_DUMP, ipsec_gre_tunnel_dump)
48 
49 static void
51  mp)
52 {
54  int rv = 0;
56  u32 sw_if_index = ~0;
57 
58  /* Check src & dst are different */
59  if (memcmp (mp->src_address, mp->dst_address, 4) == 0)
60  {
61  rv = VNET_API_ERROR_SAME_SRC_DST;
62  goto out;
63  }
64 
65  memset (a, 0, sizeof (*a));
66 
67  /* ip addresses sent in network byte order */
68  clib_memcpy (&(a->src), mp->src_address, 4);
69  clib_memcpy (&(a->dst), mp->dst_address, 4);
70  a->is_add = mp->is_add;
71  a->lsa = ntohl (mp->local_sa_id);
72  a->rsa = ntohl (mp->remote_sa_id);
73 
74  rv = vnet_ipsec_gre_add_del_tunnel (a, &sw_if_index);
75 
76 out:
77  /* *INDENT-OFF* */
78  REPLY_MACRO2(VL_API_GRE_ADD_DEL_TUNNEL_REPLY,
79  ({
80  rmp->sw_if_index = ntohl (sw_if_index);
81  }));
82  /* *INDENT-ON* */
83 }
84 
87 {
89 
90  rmp = vl_msg_api_alloc (sizeof (*rmp));
91  memset (rmp, 0, sizeof (*rmp));
92  rmp->_vl_msg_id = ntohs (VL_API_IPSEC_GRE_TUNNEL_DETAILS);
93  clib_memcpy (rmp->src_address, &(t->tunnel_src), 4);
94  clib_memcpy (rmp->dst_address, &(t->tunnel_dst), 4);
95  rmp->sw_if_index = htonl (t->sw_if_index);
96  rmp->local_sa_id = htonl (t->local_sa_id);
97  rmp->remote_sa_id = htonl (t->remote_sa_id);
98  rmp->context = context;
99 
100  vl_msg_api_send_shmem (q, (u8 *) & rmp);
101 }
102 
105 {
109  u32 sw_if_index;
110 
112  if (q == 0)
113  {
114  return;
115  }
116 
117  sw_if_index = ntohl (mp->sw_if_index);
118 
119  if (~0 == sw_if_index)
120  {
121  /* *INDENT-OFF* */
122  pool_foreach (t, igm->tunnels,
123  ({
124  send_ipsec_gre_tunnel_details(t, q, mp->context);
125  }));
126  /* *INDENT-ON* */
127  }
128  else
129  {
130  if ((sw_if_index >= vec_len (igm->tunnel_index_by_sw_if_index)) ||
131  (~0 == igm->tunnel_index_by_sw_if_index[sw_if_index]))
132  {
133  return;
134  }
135  t = &igm->tunnels[igm->tunnel_index_by_sw_if_index[sw_if_index]];
137  }
138 }
139 
140 /*
141  * ipsec_gre_api_hookup
142  * Add vpe's API message handlers to the table.
143  * vlib has alread mapped shared memory and
144  * added the client registration handlers.
145  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
146  */
147 #define vl_msg_name_crc_list
148 #include <vnet/vnet_all_api_h.h>
149 #undef vl_msg_name_crc_list
150 
151 static void
153 {
154 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
155  foreach_vl_msg_name_crc_ipsec_gre;
156 #undef _
157 }
158 
159 static clib_error_t *
161 {
162  api_main_t *am = &api_main;
163 
164 #define _(N,n) \
165  vl_msg_api_set_handlers(VL_API_##N, #n, \
166  vl_api_##n##_t_handler, \
167  vl_noop_handler, \
168  vl_api_##n##_t_endian, \
169  vl_api_##n##_t_print, \
170  sizeof(vl_api_##n##_t), 1);
172 #undef _
173 
174  /*
175  * Set up the (msg_name, crc, message-id) table
176  */
178 
179  return 0;
180 }
181 
183 
184 /*
185  * fd.io coding-style-patch-verification: ON
186  *
187  * Local Variables:
188  * eval: (c-set-style "gnu")
189  * End:
190  */
Add / del ipsec gre tunnel request.
Definition: ipsec_gre.api:25
ip4_address_t tunnel_dst
tunnel IPv4 dst address
Definition: ipsec_gre.h:53
a
Definition: bitmap.h:516
void vl_msg_api_send_shmem(unix_shared_memory_queue_t *q, u8 *elem)
L2-GRE over IPSec packet processing.
#define REPLY_MACRO2(t, body)
unix_shared_memory_queue_t * vl_api_client_index_to_input_queue(u32 index)
VLIB_API_INIT_FUNCTION(ipsec_gre_api_hookup)
static void vl_api_ipsec_gre_add_del_tunnel_t_handler(vl_api_ipsec_gre_add_del_tunnel_t *mp)
Definition: ipsec_gre_api.c:50
api_main_t api_main
Definition: api_shared.c:35
Dump ipsec gre tunnel table.
Definition: ipsec_gre.api:51
ipsec_gre_tunnel_t * tunnels
pool of tunnel instances
Definition: ipsec_gre.h:68
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:376
Reply for add / del ipsec gre tunnel request.
Definition: ipsec_gre.api:40
ipsec_gre_main_t ipsec_gre_main
Definition: ipsec_gre.c:25
static void setup_message_id_table(api_main_t *am)
u32 sw_if_index
hardware interface index
Definition: ipsec_gre.h:58
u32 remote_sa_id
remote IPSec SA id
Definition: ipsec_gre.h:57
IPSec-GRE tunnel add/del arguments.
Definition: ipsec_gre.h:93
u32 lsa
local IPSec SA id
Definition: ipsec_gre.h:99
static void vl_api_ipsec_gre_tunnel_dump_t_handler(vl_api_ipsec_gre_tunnel_dump_t *mp)
static clib_error_t * ipsec_gre_api_hookup(vlib_main_t *vm)
ipsec gre tunnel operational state response
Definition: ipsec_gre.api:65
u8 is_add
1 - add, 0 - delete
Definition: ipsec_gre.h:95
u32 * tunnel_index_by_sw_if_index
mapping from sw_if_index to tunnel index
Definition: ipsec_gre.h:74
void * vl_msg_api_alloc(int nbytes)
vlib_main_t * vm
Definition: buffer.c:276
#define clib_memcpy(a, b, c)
Definition: string.h:69
static void send_ipsec_gre_tunnel_details(ipsec_gre_tunnel_t *t, unix_shared_memory_queue_t *q, u32 context)
Definition: ipsec_gre_api.c:86
IPSec-GRE state.
Definition: ipsec_gre.h:66
u32 rsa
remote IPSec SA id
Definition: ipsec_gre.h:100
int vnet_ipsec_gre_add_del_tunnel(vnet_ipsec_gre_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Add or delete ipsec-gre tunnel interface.
Definition: interface.c:93
ip4_address_t src
tunnel IPv4 src address
Definition: ipsec_gre.h:97
unsigned int u32
Definition: types.h:88
#define foreach_vpe_api_msg
Definition: ipsec_gre_api.c:45
IPSec-GRE tunnel parameters.
Definition: ipsec_gre.h:50
u32 local_sa_id
local IPSec SA id
Definition: ipsec_gre.h:56
ip4_address_t dst
tunnel IPv4 dst address
Definition: ipsec_gre.h:98
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
ip4_address_t tunnel_src
tunnel IPv4 src address
Definition: ipsec_gre.h:52
struct _unix_shared_memory_queue unix_shared_memory_queue_t