1/*
2 * ipip_api.c - ipip api
3 *
4 * Copyright (c) 2018 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#include <vlibmemory/api.h>
19#include <vnet/api_errno.h>
20#include <vnet/fib/fib_table.h>
21#include <vnet/interface.h>
22#include <vnet/ipip/ipip.h>
23#include <vnet/vnet.h>
24#include <vnet/ip/ip_types_api.h>
25#include <vnet/tunnel/tunnel_types_api.h>
26
27#include <vnet/ipip/ipip.api_enum.h>
28#include <vnet/ipip/ipip.api_types.h>
29
30#define REPLY_MSG_ID_BASE im->msg_id_base
31#include <vlibapi/api_helper_macros.h>
32
33static void
34vl_api_ipip_add_tunnel_t_handler (vl_api_ipip_add_tunnel_t * mp)
35{
36  ipip_main_t *im = &ipip_main;
37  vl_api_ipip_add_tunnel_reply_t *rmp;
38  int rv = 0;
39  u32 fib_index, sw_if_index = ~0;
40  tunnel_encap_decap_flags_t flags;
41  ip46_address_t src, dst;
42  ip46_type_t itype[2];
43  tunnel_mode_t mode;
44
45  itype[0] = ip_address_decode (&mp->tunnel.src, &src);
46  itype[1] = ip_address_decode (&mp->tunnel.dst, &dst);
47
48  if (itype[0] != itype[1])
49    {
50      rv = VNET_API_ERROR_INVALID_PROTOCOL;
51      goto out;
52    }
53
54  if (ip46_address_is_equal (&src, &dst))
55    {
56      rv = VNET_API_ERROR_SAME_SRC_DST;
57      goto out;
58    }
59
60  rv = tunnel_encap_decap_flags_decode (mp->tunnel.flags, &flags);
61
62  if (rv)
63    goto out;
64
65  rv = tunnel_mode_decode (mp->tunnel.mode, &mode);
66
67  if (rv)
68    goto out;
69
70  fib_index = fib_table_find (fib_proto_from_ip46 (itype[0]),
71			      ntohl (mp->tunnel.table_id));
72
73  if (~0 == fib_index)
74    {
75      rv = VNET_API_ERROR_NO_SUCH_FIB;
76    }
77  else
78    {
79      rv = ipip_add_tunnel ((itype[0] == IP46_TYPE_IP6 ?
80			     IPIP_TRANSPORT_IP6 :
81			     IPIP_TRANSPORT_IP4),
82			    ntohl (mp->tunnel.instance), &src, &dst,
83			    fib_index, flags,
84			    ip_dscp_decode (mp->tunnel.dscp), mode,
85			    &sw_if_index);
86    }
87
88out:
89  /* *INDENT-OFF* */
90  REPLY_MACRO2(VL_API_IPIP_ADD_TUNNEL_REPLY,
91  ({
92    rmp->sw_if_index = ntohl(sw_if_index);
93  }));
94  /* *INDENT-ON* */
95}
96
97static void
98vl_api_ipip_del_tunnel_t_handler (vl_api_ipip_del_tunnel_t * mp)
99{
100  ipip_main_t *im = &ipip_main;
101  vl_api_ipip_del_tunnel_reply_t *rmp;
102
103  int rv = ipip_del_tunnel (ntohl (mp->sw_if_index));
104
105  REPLY_MACRO (VL_API_IPIP_DEL_TUNNEL_REPLY);
106}
107
108static void
109send_ipip_tunnel_details (ipip_tunnel_t * t, vl_api_ipip_tunnel_dump_t * mp)
110{
111  ipip_main_t *im = &ipip_main;
112  vl_api_ipip_tunnel_details_t *rmp;
113  bool is_ipv6 = t->transport == IPIP_TRANSPORT_IP6 ? true : false;
114  fib_table_t *ft;
115  int rv = 0;
116
117  ft = fib_table_get (t->fib_index, (is_ipv6 ? FIB_PROTOCOL_IP6 :
118				     FIB_PROTOCOL_IP4));
119
120  /* *INDENT-OFF* */
121  REPLY_MACRO_DETAILS2(VL_API_IPIP_TUNNEL_DETAILS,
122  ({
123    ip_address_encode (&t->tunnel_src, IP46_TYPE_ANY, &rmp->tunnel.src);
124    ip_address_encode (&t->tunnel_dst, IP46_TYPE_ANY, &rmp->tunnel.dst);
125    rmp->tunnel.table_id = htonl (ft->ft_table_id);
126    rmp->tunnel.instance = htonl (t->user_instance);
127    rmp->tunnel.sw_if_index = htonl (t->sw_if_index);
128    rmp->tunnel.dscp = ip_dscp_encode(t->dscp);
129    rmp->tunnel.flags = tunnel_encap_decap_flags_encode(t->flags);
130  }));
131    /* *INDENT-ON* */
132}
133
134static void
135vl_api_ipip_tunnel_dump_t_handler (vl_api_ipip_tunnel_dump_t * mp)
136{
137  ipip_main_t *im = &ipip_main;
138  ipip_tunnel_t *t;
139  u32 sw_if_index;
140
141  sw_if_index = ntohl (mp->sw_if_index);
142
143  if (sw_if_index == ~0)
144    {
145    /* *INDENT-OFF* */
146    pool_foreach(t, im->tunnels,
147    ({
148      send_ipip_tunnel_details(t, mp);
149    }));
150    /* *INDENT-ON* */
151    }
152  else
153    {
154      t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
155      if (t)
156	send_ipip_tunnel_details (t, mp);
157    }
158}
159
160static void
161vl_api_ipip_6rd_add_tunnel_t_handler (vl_api_ipip_6rd_add_tunnel_t * mp)
162{
163  ipip_main_t *im = &ipip_main;
164  vl_api_ipip_6rd_add_tunnel_reply_t *rmp;
165  u32 sixrd_tunnel_index, ip4_fib_index, ip6_fib_index;
166  int rv;
167
168  sixrd_tunnel_index = ~0;
169  ip4_fib_index = fib_table_find (FIB_PROTOCOL_IP4, ntohl (mp->ip4_table_id));
170  ip6_fib_index = fib_table_find (FIB_PROTOCOL_IP6, ntohl (mp->ip6_table_id));
171
172  if (~0 == ip4_fib_index || ~0 == ip6_fib_index)
173
174    {
175      rv = VNET_API_ERROR_NO_SUCH_FIB;
176    }
177  else
178    {
179      rv = sixrd_add_tunnel ((ip6_address_t *) & mp->ip6_prefix.address,
180			     mp->ip6_prefix.len,
181			     (ip4_address_t *) & mp->ip4_prefix.address,
182			     mp->ip4_prefix.len,
183			     (ip4_address_t *) & mp->ip4_src,
184			     mp->security_check,
185			     ip4_fib_index, ip6_fib_index,
186			     &sixrd_tunnel_index);
187    }
188
189  /* *INDENT-OFF* */
190  REPLY_MACRO2 (VL_API_IPIP_6RD_ADD_TUNNEL_REPLY,
191  ({
192    rmp->sw_if_index = htonl (sixrd_tunnel_index);
193  }));
194  /* *INDENT-ON* */
195}
196
197static void
198vl_api_ipip_6rd_del_tunnel_t_handler (vl_api_ipip_6rd_del_tunnel_t * mp)
199{
200  ipip_main_t *im = &ipip_main;
201  vl_api_ipip_6rd_del_tunnel_reply_t *rmp;
202
203  int rv = sixrd_del_tunnel (ntohl (mp->sw_if_index));
204
205  REPLY_MACRO (VL_API_IPIP_6RD_DEL_TUNNEL_REPLY);
206}
207
208/*
209 * ipip_api_hookup
210 * Add vpe's API message handlers to the table.
211 * vlib has already mapped shared memory and
212 * added the client registration handlers.
213 * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
214 */
215/* API definitions */
216#include <vnet/format_fns.h>
217#include <vnet/ipip/ipip.api.c>
218
219static clib_error_t *
220ipip_api_hookup (vlib_main_t * vm)
221{
222  ipip_main_t *im = &ipip_main;
223
224  /*
225   * Set up the (msg_name, crc, message-id) table
226   */
227  im->msg_id_base = setup_message_id_table ();
228
229  return 0;
230}
231
232VLIB_API_INIT_FUNCTION (ipip_api_hookup);
233
234/*
235 * fd.io coding-style-patch-verification: ON
236 *
237 * Local Variables:
238 * eval: (c-set-style "gnu")
239 * End:
240 */
241