summaryrefslogtreecommitdiffstats
path: root/src/plugins/urpf/urpf_api.c
blob: f5d31e1fce6d1e75c7d0455a2fd090f577209015 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <urpf/urpf.h>
#include <vnet/plugin/plugin.h>
#include <vnet/ip/ip_types_api.h>

#include <vpp/app/version.h>

#include <vlibapi/api.h>
#include <vlibmemory/api.h>

/* define message IDs */
#include <vnet/format_fns.h>
#include <urpf/urpf.api_enum.h>
#include <urpf/urpf.api_types.h>
#include <vnet/fib/fib_table.h>
#include <vnet/ip/ip_types.h>

/**
 * Base message ID fot the plugin
 */
static u32 urpf_base_msg_id;
#define REPLY_MSG_ID_BASE urpf_base_msg_id

#include <vlibapi/api_helper_macros.h>

static int
urpf_mode_decode (vl_api_urpf_mode_t in, urpf_mode_t * out)
{
  if (0)
    ;
#define _(a,b)                                  \
  else if (URPF_API_MODE_##a == in)             \
    {                                           \
      *out = URPF_MODE_##a;                     \
      return (0);                               \
    }
  foreach_urpf_mode
#undef _
    return (VNET_API_ERROR_INVALID_VALUE);
}

static void
vl_api_urpf_update_t_handler (vl_api_urpf_update_t * mp)
{
  vl_api_urpf_update_reply_t *rmp;
  ip_address_family_t af;
  urpf_mode_t mode;
  int rv = 0;

  VALIDATE_SW_IF_INDEX (mp);

  rv = urpf_mode_decode (mp->mode, &mode);
  if (rv)
    goto done;

  rv = ip_address_family_decode (mp->af, &af);
  if (rv)
    goto done;

  rv = urpf_update (mode, htonl (mp->sw_if_index), af,
		    (mp->is_input ? VLIB_RX : VLIB_TX), 0);
  if (rv)
    goto done;

  BAD_SW_IF_INDEX_LABEL;
done:
  REPLY_MACRO (VL_API_URPF_UPDATE_REPLY);
}

static void
vl_api_urpf_update_v2_t_handler (vl_api_urpf_update_v2_t *mp)
{
  vl_api_urpf_update_reply_t *rmp;
  ip_address_family_t af;
  urpf_mode_t mode;
  int rv = 0;

  VALIDATE_SW_IF_INDEX (mp);

  rv = urpf_mode_decode (mp->mode, &mode);
  if (rv)
    goto done;

  rv = ip_address_family_decode (mp->af, &af);

  if (rv)
    goto done;

  rv = urpf_update (mode, htonl (mp->sw_if_index), af,
		    (mp->is_input ? VLIB_RX : VLIB_TX), ntohl (mp->table_id));

  if (rv)
    goto done;

  BAD_SW_IF_INDEX_LABEL;
done:
  REPLY_MACRO (VL_API_URPF_UPDATE_V2_REPLY);
}

static void
send_urpf_interface_details (vpe_api_main_t *am, vl_api_registration_t *reg,
			     u32 context, const u32 sw_if_index,
			     const urpf_data_t *ud,
			     const ip_address_family_t af,
			     const vlib_dir_t dir)
{
  vl_api_urpf_interface_details_t *mp;

  mp = vl_msg_api_alloc_zero (sizeof (*mp));
  mp->_vl_msg_id = ntohs (REPLY_MSG_ID_BASE + VL_API_URPF_INTERFACE_DETAILS);
  mp->context = context;

  mp->sw_if_index = htonl (sw_if_index);
  mp->table_id = htonl (fib_table_get_table_id (
    ud->fib_index, (af == AF_IP4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6)));
  mp->af = (vl_api_address_family_t) af;
  mp->mode = (vl_api_urpf_mode_t) ud->mode;
  mp->is_input = (dir == VLIB_RX);

  vl_api_send_msg (reg, (u8 *) mp);
}

static void
send_urpf_interface (vpe_api_main_t *am, vl_api_registration_t *reg,
		     u32 context, const u32 sw_if_index)
{
  urpf_data_t *ud;
  vlib_dir_t dir;
  ip_address_family_t af;

  FOR_EACH_IP_ADDRESS_FAMILY (af)
  FOREACH_VLIB_DIR (dir)
  if (sw_if_index < vec_len (urpf_cfgs[af][dir]))
    {
      ud = &urpf_cfgs[af][dir][sw_if_index];
      if (ud->mode || ud->fib_index_is_custom)
	send_urpf_interface_details (am, reg, context, sw_if_index, ud, af,
				     dir);
    }
}

static void
vl_api_urpf_interface_dump_t_handler (vl_api_urpf_interface_dump_t *mp)
{
  vpe_api_main_t *am = &vpe_api_main;
  vl_api_registration_t *reg;
  vnet_interface_main_t *im = &vnet_main.interface_main;
  vnet_sw_interface_t *si;
  u32 sw_if_index = ~0;
  int __attribute__ ((unused)) rv = 0;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;
  sw_if_index = ntohl (mp->sw_if_index);

  if (sw_if_index == ~0)
    {
      pool_foreach (si, im->sw_interfaces)
	{
	  send_urpf_interface (am, reg, mp->context, si->sw_if_index);
	}
      return;
    }
  VALIDATE_SW_IF_INDEX (mp);
  send_urpf_interface (am, reg, mp->context, sw_if_index);
  BAD_SW_IF_INDEX_LABEL;
}

#include <urpf/urpf.api.c>

static clib_error_t *
urpf_api_init (vlib_main_t * vm)
{
  /* Ask for a correctly-sized block of API message decode slots */
  urpf_base_msg_id = setup_message_id_table ();

  return 0;
}

VLIB_INIT_FUNCTION (urpf_api_init);

/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
    .version = VPP_BUILD_VER,
    .description = "Unicast Reverse Path Forwarding (uRPF)",
};
/* *INDENT-ON* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */