l2tp_api.c revision 39d69112
1/*
2 *------------------------------------------------------------------
3 * l2tp_api.c - l2tpv3 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>
25#include <vnet/l2tp/l2tp.h>
26#include <vnet/ip/ip_types_api.h>
27
28#include <vnet/vnet_msg_enum.h>
29
30#define vl_typedefs		/* define message structures */
31#include <vnet/vnet_all_api_h.h>
32#undef vl_typedefs
33
34#define vl_endianfun		/* define message structures */
35#include <vnet/vnet_all_api_h.h>
36#undef vl_endianfun
37
38/* instantiate all the print functions we know about */
39#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
40#define vl_printfun
41#include <vnet/vnet_all_api_h.h>
42#undef vl_printfun
43
44#include <vlibapi/api_helper_macros.h>
45
46#define foreach_vpe_api_msg                             \
47_(L2TPV3_CREATE_TUNNEL, l2tpv3_create_tunnel)                           \
48_(L2TPV3_SET_TUNNEL_COOKIES, l2tpv3_set_tunnel_cookies)                 \
49_(L2TPV3_INTERFACE_ENABLE_DISABLE, l2tpv3_interface_enable_disable)     \
50_(L2TPV3_SET_LOOKUP_KEY, l2tpv3_set_lookup_key)                         \
51_(SW_IF_L2TPV3_TUNNEL_DUMP, sw_if_l2tpv3_tunnel_dump)
52
53static void
54send_sw_if_l2tpv3_tunnel_details (vpe_api_main_t * am,
55				  vl_api_registration_t * reg,
56				  l2t_session_t * s,
57				  l2t_main_t * lm, u32 context)
58{
59  vl_api_sw_if_l2tpv3_tunnel_details_t *mp;
60  u8 *if_name = NULL;
61  vnet_sw_interface_t *si = NULL;
62
63  si = vnet_get_hw_sw_interface (lm->vnet_main, s->hw_if_index);
64
65  if_name = format (if_name, "%U",
66		    format_vnet_sw_interface_name, lm->vnet_main, si);
67
68  mp = vl_msg_api_alloc (sizeof (*mp));
69  clib_memset (mp, 0, sizeof (*mp));
70  mp->_vl_msg_id = ntohs (VL_API_SW_IF_L2TPV3_TUNNEL_DETAILS);
71  strncpy ((char *) mp->interface_name,
72	   (char *) if_name, ARRAY_LEN (mp->interface_name) - 1);
73  mp->sw_if_index = ntohl (si->sw_if_index);
74  mp->local_session_id = s->local_session_id;
75  mp->remote_session_id = s->remote_session_id;
76  mp->local_cookie[0] = s->local_cookie[0];
77  mp->local_cookie[1] = s->local_cookie[1];
78  mp->remote_cookie = s->remote_cookie;
79  ip_address_encode ((ip46_address_t *) & s->client_address, IP46_TYPE_IP6,
80		     &mp->client_address);
81  ip_address_encode ((ip46_address_t *) & s->our_address, IP46_TYPE_IP6,
82		     &mp->our_address);
83  mp->l2_sublayer_present = s->l2_sublayer_present;
84  mp->context = context;
85
86  vl_api_send_msg (reg, (u8 *) mp);
87}
88
89
90static void
91vl_api_sw_if_l2tpv3_tunnel_dump_t_handler (vl_api_sw_if_l2tpv3_tunnel_dump_t *
92					   mp)
93{
94  vpe_api_main_t *am = &vpe_api_main;
95  l2t_main_t *lm = &l2t_main;
96  vl_api_registration_t *reg;
97  l2t_session_t *session;
98
99  reg = vl_api_client_index_to_registration (mp->client_index);
100  if (!reg)
101    return;
102
103  /* *INDENT-OFF* */
104  pool_foreach (session, lm->sessions,
105  ({
106    send_sw_if_l2tpv3_tunnel_details (am, reg, session, lm, mp->context);
107  }));
108  /* *INDENT-ON* */
109}
110
111static void vl_api_l2tpv3_create_tunnel_t_handler
112  (vl_api_l2tpv3_create_tunnel_t * mp)
113{
114  vl_api_l2tpv3_create_tunnel_reply_t *rmp;
115  l2t_main_t *lm = &l2t_main;
116  u32 sw_if_index = (u32) ~ 0;
117  int rv;
118  ip46_address_t client, our;
119
120  if (mp->our_address.af == ADDRESS_IP4)
121    {
122      rv = VNET_API_ERROR_UNIMPLEMENTED;
123      goto out;
124    }
125
126  u32 encap_fib_index;
127
128  if (mp->encap_vrf_id != ~0)
129    {
130      uword *p;
131      ip6_main_t *im = &ip6_main;
132      if (!
133	  (p =
134	   hash_get (im->fib_index_by_table_id, ntohl (mp->encap_vrf_id))))
135	{
136	  rv = VNET_API_ERROR_NO_SUCH_FIB;
137	  goto out;
138	}
139      encap_fib_index = p[0];
140    }
141  else
142    {
143      encap_fib_index = ~0;
144    }
145
146  ip_address_decode (&mp->client_address, &client);
147  ip_address_decode (&mp->our_address, &our);
148
149  rv = create_l2tpv3_ipv6_tunnel (lm,
150				  &client.ip6,
151				  &our.ip6,
152				  ntohl (mp->local_session_id),
153				  ntohl (mp->remote_session_id),
154				  clib_net_to_host_u64 (mp->local_cookie),
155				  clib_net_to_host_u64 (mp->remote_cookie),
156				  mp->l2_sublayer_present,
157				  encap_fib_index, &sw_if_index);
158
159out:
160  /* *INDENT-OFF* */
161  REPLY_MACRO2(VL_API_L2TPV3_CREATE_TUNNEL_REPLY,
162  ({
163    rmp->sw_if_index = ntohl (sw_if_index);
164  }));
165  /* *INDENT-ON* */
166}
167
168static void vl_api_l2tpv3_set_tunnel_cookies_t_handler
169  (vl_api_l2tpv3_set_tunnel_cookies_t * mp)
170{
171  vl_api_l2tpv3_set_tunnel_cookies_reply_t *rmp;
172  l2t_main_t *lm = &l2t_main;
173  int rv;
174
175  VALIDATE_SW_IF_INDEX (mp);
176
177  rv = l2tpv3_set_tunnel_cookies (lm, ntohl (mp->sw_if_index),
178				  clib_net_to_host_u64 (mp->new_local_cookie),
179				  clib_net_to_host_u64
180				  (mp->new_remote_cookie));
181
182  BAD_SW_IF_INDEX_LABEL;
183
184  REPLY_MACRO (VL_API_L2TPV3_SET_TUNNEL_COOKIES_REPLY);
185}
186
187static void vl_api_l2tpv3_interface_enable_disable_t_handler
188  (vl_api_l2tpv3_interface_enable_disable_t * mp)
189{
190  int rv;
191  vnet_main_t *vnm = vnet_get_main ();
192  vl_api_l2tpv3_interface_enable_disable_reply_t *rmp;
193
194  VALIDATE_SW_IF_INDEX (mp);
195
196  rv = l2tpv3_interface_enable_disable
197    (vnm, ntohl (mp->sw_if_index), mp->enable_disable);
198
199  BAD_SW_IF_INDEX_LABEL;
200
201  REPLY_MACRO (VL_API_L2TPV3_INTERFACE_ENABLE_DISABLE_REPLY);
202}
203
204static void vl_api_l2tpv3_set_lookup_key_t_handler
205  (vl_api_l2tpv3_set_lookup_key_t * mp)
206{
207  int rv = 0;
208  l2t_main_t *lm = &l2t_main;
209  vl_api_l2tpv3_set_lookup_key_reply_t *rmp;
210
211  if (mp->key > L2T_LOOKUP_KEY_API_SESSION_ID)
212    {
213      rv = VNET_API_ERROR_INVALID_VALUE;
214      goto out;
215    }
216
217  lm->lookup_type = (ip6_to_l2_lookup_t) mp->key;
218
219out:
220  REPLY_MACRO (VL_API_L2TPV3_SET_LOOKUP_KEY_REPLY);
221}
222
223/*
224 * l2tp_api_hookup
225 * Add vpe's API message handlers to the table.
226 * vlib has already mapped shared memory and
227 * added the client registration handlers.
228 * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
229 */
230#define vl_msg_name_crc_list
231#include <vnet/vnet_all_api_h.h>
232#undef vl_msg_name_crc_list
233
234static void
235setup_message_id_table (api_main_t * am)
236{
237#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
238  foreach_vl_msg_name_crc_l2tp;
239#undef _
240}
241
242static clib_error_t *
243l2tp_api_hookup (vlib_main_t * vm)
244{
245  api_main_t *am = vlibapi_get_main ();
246
247#define _(N,n)                                                  \
248    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
249                           vl_api_##n##_t_handler,              \
250                           vl_noop_handler,                     \
251                           vl_api_##n##_t_endian,               \
252                           vl_api_##n##_t_print,                \
253                           sizeof(vl_api_##n##_t), 1);
254  foreach_vpe_api_msg;
255#undef _
256
257  /*
258   * Set up the (msg_name, crc, message-id) table
259   */
260  setup_message_id_table (am);
261
262  return 0;
263}
264
265VLIB_API_INIT_FUNCTION (l2tp_api_hookup);
266
267/*
268 * fd.io coding-style-patch-verification: ON
269 *
270 * Local Variables:
271 * eval: (c-set-style "gnu")
272 * End:
273 */
274