Line data Source code
1 : /*
2 : * proxy_node.c: dhcp proxy node processing
3 : *
4 : * Copyright (c) 2013 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 <vlib/vlib.h>
19 : #include <dhcp/dhcp_proxy.h>
20 : #include <dhcp/client.h>
21 : #include <vnet/fib/ip4_fib.h>
22 :
23 : static char *dhcp_proxy_error_strings[] = {
24 : #define dhcp_proxy_error(n,s) s,
25 : #include <dhcp/dhcp4_proxy_error.def>
26 : #undef dhcp_proxy_error
27 : };
28 :
29 : #define foreach_dhcp_proxy_to_server_input_next \
30 : _ (DROP, "error-drop") \
31 : _ (LOOKUP, "ip4-lookup") \
32 : _ (SEND_TO_CLIENT, "dhcp-proxy-to-client")
33 :
34 : typedef enum
35 : {
36 : #define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s,
37 : foreach_dhcp_proxy_to_server_input_next
38 : #undef _
39 : DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
40 : } dhcp_proxy_to_server_input_next_t;
41 :
42 : typedef struct
43 : {
44 : /* 0 => to server, 1 => to client */
45 : int which;
46 : ip4_address_t trace_ip4_address;
47 : u32 error;
48 : u32 sw_if_index;
49 : u32 original_sw_if_index;
50 :
51 : /* enough space for the DHCP header plus some options */
52 : u8 packet_data[2 * sizeof (dhcp_header_t)];
53 : }
54 : dhcp_proxy_trace_t;
55 :
56 : #define VPP_DHCP_OPTION82_SUB1_SIZE 6
57 : #define VPP_DHCP_OPTION82_SUB5_SIZE 6
58 : #define VPP_DHCP_OPTION82_VSS_SIZE 12
59 : #define VPP_DHCP_OPTION82_SIZE (VPP_DHCP_OPTION82_SUB1_SIZE + \
60 : VPP_DHCP_OPTION82_SUB5_SIZE + \
61 : VPP_DHCP_OPTION82_VSS_SIZE +3)
62 :
63 : static vlib_node_registration_t dhcp_proxy_to_server_node;
64 : static vlib_node_registration_t dhcp_proxy_to_client_node;
65 :
66 : static u8 *
67 3 : format_dhcp_proxy_trace (u8 * s, va_list * args)
68 : {
69 3 : CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
70 3 : CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
71 3 : dhcp_proxy_trace_t *t = va_arg (*args, dhcp_proxy_trace_t *);
72 :
73 3 : if (t->which == 0)
74 0 : s = format (s, "DHCP proxy: sent to server %U\n",
75 : format_ip4_address, &t->trace_ip4_address, t->error);
76 : else
77 3 : s = format (s, "DHCP proxy: broadcast to client from %U\n",
78 : format_ip4_address, &t->trace_ip4_address);
79 :
80 3 : if (t->error != (u32) ~ 0)
81 3 : s = format (s, " error: %s\n", dhcp_proxy_error_strings[t->error]);
82 :
83 3 : s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
84 : t->original_sw_if_index, t->sw_if_index);
85 3 : s = format (s, " %U",
86 3 : format_dhcp_header, t->packet_data, sizeof (t->packet_data));
87 :
88 3 : return s;
89 : }
90 :
91 : static u8 *
92 0 : format_dhcp_proxy_header_with_length (u8 * s, va_list * args)
93 : {
94 0 : dhcp_header_t *h = va_arg (*args, dhcp_header_t *);
95 0 : u32 max_header_bytes = va_arg (*args, u32);
96 : u32 header_bytes;
97 :
98 0 : header_bytes = sizeof (h[0]);
99 0 : if (max_header_bytes != 0 && header_bytes > max_header_bytes)
100 0 : return format (s, "dhcp header truncated");
101 :
102 0 : s = format (s, "DHCP Proxy");
103 :
104 0 : return s;
105 : }
106 :
107 : static uword
108 13 : dhcp_proxy_to_server_input (vlib_main_t * vm,
109 : vlib_node_runtime_t * node,
110 : vlib_frame_t * from_frame)
111 : {
112 : u32 n_left_from, next_index, *from, *to_next;
113 13 : dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
114 13 : from = vlib_frame_vector_args (from_frame);
115 13 : n_left_from = from_frame->n_vectors;
116 13 : u32 pkts_to_server = 0, pkts_to_client = 0, pkts_no_server = 0;
117 13 : u32 pkts_no_interface_address = 0;
118 13 : u32 pkts_too_big = 0;
119 13 : ip4_main_t *im = &ip4_main;
120 :
121 13 : next_index = node->cached_next_index;
122 :
123 26 : while (n_left_from > 0)
124 : {
125 : u32 n_left_to_next;
126 :
127 13 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
128 :
129 27 : while (n_left_from > 0 && n_left_to_next > 0)
130 : {
131 : u32 bi0;
132 : vlib_buffer_t *b0;
133 : udp_header_t *u0;
134 : dhcp_header_t *h0;
135 : ip4_header_t *ip0;
136 : u32 next0;
137 : u32 old0, new0;
138 : ip_csum_t sum0;
139 14 : u32 error0 = (u32) ~ 0;
140 14 : u32 sw_if_index = 0;
141 14 : u32 original_sw_if_index = 0;
142 : u32 fib_index;
143 : dhcp_proxy_t *proxy;
144 : dhcp_server_t *server;
145 : u32 rx_sw_if_index;
146 : dhcp_option_t *o, *end;
147 14 : u32 len = 0;
148 14 : u8 is_discover = 0;
149 : int space_left;
150 :
151 14 : bi0 = from[0];
152 14 : from += 1;
153 14 : n_left_from -= 1;
154 :
155 14 : b0 = vlib_get_buffer (vm, bi0);
156 :
157 14 : h0 = vlib_buffer_get_current (b0);
158 :
159 : /*
160 : * udp_local hands us the DHCP header, need udp hdr,
161 : * ip hdr to relay to server
162 : */
163 14 : vlib_buffer_advance (b0, -(sizeof (*u0)));
164 14 : u0 = vlib_buffer_get_current (b0);
165 :
166 : /* This blows. Return traffic has src_port = 67, dst_port = 67 */
167 14 : if (u0->src_port ==
168 14 : clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_server))
169 : {
170 5 : vlib_buffer_advance (b0, sizeof (*u0));
171 5 : next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
172 5 : error0 = 0;
173 5 : pkts_to_client++;
174 5 : goto do_enqueue;
175 : }
176 :
177 9 : rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
178 9 : fib_index = im->fib_index_by_sw_if_index[rx_sw_if_index];
179 9 : proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
180 :
181 9 : if (PREDICT_FALSE (NULL == proxy))
182 : {
183 0 : error0 = DHCP_PROXY_ERROR_NO_SERVER;
184 0 : next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
185 0 : pkts_no_server++;
186 0 : goto do_trace;
187 : }
188 :
189 9 : if (!vlib_buffer_chain_linearize (vm, b0))
190 : {
191 0 : error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG;
192 0 : next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
193 0 : pkts_too_big++;
194 0 : goto do_trace;
195 : }
196 9 : space_left = vlib_buffer_space_left_at_end (vm, b0);
197 : /* cant parse chains...
198 : * and we need some space for option 82*/
199 9 : if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 ||
200 : space_left < VPP_DHCP_OPTION82_SIZE)
201 : {
202 0 : error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG;
203 0 : next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
204 0 : pkts_too_big++;
205 0 : goto do_trace;
206 : }
207 :
208 9 : server = &proxy->dhcp_servers[0];
209 9 : vlib_buffer_advance (b0, -(sizeof (*ip0)));
210 9 : ip0 = vlib_buffer_get_current (b0);
211 :
212 : /* disable UDP checksum */
213 9 : u0->checksum = 0;
214 9 : sum0 = ip0->checksum;
215 9 : old0 = ip0->dst_address.as_u32;
216 9 : new0 = server->dhcp_server.ip4.as_u32;
217 9 : ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32;
218 9 : sum0 = ip_csum_update (sum0, old0, new0,
219 : ip4_header_t /* structure */ ,
220 : dst_address /* changed member */ );
221 9 : ip0->checksum = ip_csum_fold (sum0);
222 :
223 9 : sum0 = ip0->checksum;
224 9 : old0 = ip0->src_address.as_u32;
225 9 : new0 = proxy->dhcp_src_address.ip4.as_u32;
226 9 : ip0->src_address.as_u32 = new0;
227 9 : sum0 = ip_csum_update (sum0, old0, new0,
228 : ip4_header_t /* structure */ ,
229 : src_address /* changed member */ );
230 9 : ip0->checksum = ip_csum_fold (sum0);
231 :
232 : /* Send to DHCP server via the configured FIB */
233 9 : vnet_buffer (b0)->sw_if_index[VLIB_TX] = server->server_fib_index;
234 :
235 9 : h0->gateway_ip_address = proxy->dhcp_src_address.ip4;
236 9 : pkts_to_server++;
237 :
238 9 : o = h0->options;
239 9 : end = (void *) vlib_buffer_get_tail (b0);
240 :
241 : /* TLVs are not performance-friendly... */
242 18 : while (o->option != DHCP_PACKET_OPTION_END && o < end)
243 : {
244 9 : if (DHCP_PACKET_OPTION_MSG_TYPE == o->option)
245 : {
246 9 : if (DHCP_PACKET_DISCOVER == o->data[0])
247 : {
248 8 : is_discover = 1;
249 : }
250 : }
251 9 : o = (dhcp_option_t *) (o->data + o->length);
252 : }
253 :
254 9 : if (o->option == DHCP_PACKET_OPTION_END && o <= end)
255 9 : {
256 9 : vnet_main_t *vnm = vnet_get_main ();
257 : u16 old_l0, new_l0;
258 9 : ip4_address_t _ia0, *ia0 = &_ia0;
259 : dhcp_vss_t *vss;
260 : vnet_sw_interface_t *swif;
261 :
262 9 : original_sw_if_index = sw_if_index =
263 9 : vnet_buffer (b0)->sw_if_index[VLIB_RX];
264 9 : swif = vnet_get_sw_interface (vnm, sw_if_index);
265 9 : if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
266 0 : sw_if_index = swif->unnumbered_sw_if_index;
267 :
268 : /*
269 : * Get the first ip4 address on the [client-side]
270 : * RX interface, if not unnumbered. otherwise use
271 : * the loopback interface's ip address.
272 : */
273 9 : ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
274 :
275 9 : if (ia0 == 0)
276 : {
277 0 : error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
278 0 : next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
279 0 : pkts_no_interface_address++;
280 0 : goto do_trace;
281 : }
282 :
283 : /* Add option 82 */
284 9 : o->option = 82; /* option 82 */
285 9 : o->length = 12; /* 12 octets to follow */
286 9 : o->data[0] = 1; /* suboption 1, circuit ID (=FIB id) */
287 9 : o->data[1] = 4; /* length of suboption */
288 9 : u32 *o_ifid = (u32 *) & o->data[2];
289 9 : *o_ifid = clib_host_to_net_u32 (original_sw_if_index);
290 9 : o->data[6] = 5; /* suboption 5 (client RX intfc address) */
291 9 : o->data[7] = 4; /* length 4 */
292 9 : u32 *o_addr = (u32 *) & o->data[8];
293 9 : *o_addr = ia0->as_u32;
294 9 : o->data[12] = DHCP_PACKET_OPTION_END;
295 :
296 9 : vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4);
297 9 : if (vss)
298 : {
299 : u32 id_len; /* length of VPN ID */
300 :
301 5 : if (vss->vss_type == VSS_TYPE_VPN_ID)
302 : {
303 4 : id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
304 4 : memcpy (&o->data[15], vss->vpn_id, id_len);
305 : }
306 1 : else if (vss->vss_type == VSS_TYPE_ASCII)
307 : {
308 1 : id_len = vec_len (vss->vpn_ascii_id);
309 1 : memcpy (&o->data[15], vss->vpn_ascii_id, id_len);
310 : }
311 : else /* must be VSS_TYPE_DEFAULT, no VPN ID */
312 0 : id_len = 0;
313 :
314 5 : o->data[12] = 151; /* vss suboption */
315 5 : o->data[13] = id_len + 1; /* length: vss_type + id_len */
316 5 : o->data[14] = vss->vss_type; /* vss option type */
317 5 : o->data[15 + id_len] = 152; /* vss control suboption */
318 5 : o->data[16 + id_len] = 0; /* length */
319 5 : o->data[17 + id_len] = DHCP_PACKET_OPTION_END; /* "end-of-options" (0xFF) */
320 : /* 5 bytes for suboption headers 151+len, 152+len and 0xFF */
321 5 : o->length += id_len + 5;
322 : }
323 :
324 9 : len = o->length + 3;
325 9 : b0->current_length += len;
326 : /* Fix IP header length and checksum */
327 9 : old_l0 = ip0->length;
328 9 : new_l0 = clib_net_to_host_u16 (old_l0);
329 9 : new_l0 += len;
330 9 : new_l0 = clib_host_to_net_u16 (new_l0);
331 9 : ip0->length = new_l0;
332 9 : sum0 = ip0->checksum;
333 9 : sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
334 : length /* changed member */ );
335 9 : ip0->checksum = ip_csum_fold (sum0);
336 :
337 : /* Fix UDP length */
338 9 : new_l0 = clib_net_to_host_u16 (u0->length);
339 9 : new_l0 += len;
340 9 : u0->length = clib_host_to_net_u16 (new_l0);
341 : }
342 : else
343 : {
344 0 : vlib_node_increment_counter
345 : (vm, dhcp_proxy_to_server_node.index,
346 : DHCP_PROXY_ERROR_OPTION_82_ERROR, 1);
347 : }
348 :
349 9 : next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
350 :
351 : /*
352 : * If we have multiple servers configured and this is the
353 : * client's discover message, then send copies to each of
354 : * those servers
355 : */
356 9 : if (is_discover && vec_len (proxy->dhcp_servers) > 1)
357 : {
358 : u32 ii;
359 :
360 2 : for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
361 : {
362 : vlib_buffer_t *c0;
363 : u32 ci0;
364 :
365 1 : c0 = vlib_buffer_copy (vm, b0);
366 1 : if (c0 == NULL)
367 : {
368 0 : vlib_node_increment_counter
369 : (vm, dhcp_proxy_to_server_node.index,
370 : DHCP_PROXY_ERROR_ALLOC_FAIL, 1);
371 0 : continue;
372 : }
373 1 : ci0 = vlib_get_buffer_index (vm, c0);
374 1 : server = &proxy->dhcp_servers[ii];
375 :
376 1 : ip0 = vlib_buffer_get_current (c0);
377 :
378 1 : sum0 = ip0->checksum;
379 1 : old0 = ip0->dst_address.as_u32;
380 1 : new0 = server->dhcp_server.ip4.as_u32;
381 1 : ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32;
382 1 : sum0 = ip_csum_update (sum0, old0, new0,
383 : ip4_header_t /* structure */ ,
384 : dst_address /* changed member */ );
385 1 : ip0->checksum = ip_csum_fold (sum0);
386 :
387 1 : to_next[0] = ci0;
388 1 : to_next += 1;
389 1 : n_left_to_next -= 1;
390 :
391 1 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
392 : to_next, n_left_to_next,
393 : ci0, next0);
394 :
395 1 : if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
396 : {
397 : dhcp_proxy_trace_t *tr;
398 :
399 1 : tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
400 1 : tr->which = 0; /* to server */
401 1 : tr->error = error0;
402 1 : tr->original_sw_if_index = original_sw_if_index;
403 1 : tr->sw_if_index = sw_if_index;
404 1 : if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
405 1 : tr->trace_ip4_address.as_u32 =
406 1 : server->dhcp_server.ip4.as_u32;
407 :
408 1 : clib_memcpy_fast (tr->packet_data, h0,
409 : sizeof (tr->packet_data));
410 :
411 : }
412 :
413 1 : if (PREDICT_FALSE (0 == n_left_to_next))
414 : {
415 0 : vlib_put_next_frame (vm, node, next_index,
416 : n_left_to_next);
417 0 : vlib_get_next_frame (vm, node, next_index,
418 : to_next, n_left_to_next);
419 : }
420 : }
421 : }
422 9 : do_trace:
423 9 : if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
424 : {
425 9 : dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
426 : b0, sizeof (*tr));
427 9 : tr->which = 0; /* to server */
428 9 : tr->error = error0;
429 9 : tr->original_sw_if_index = original_sw_if_index;
430 9 : tr->sw_if_index = sw_if_index;
431 9 : if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
432 9 : tr->trace_ip4_address.as_u32 =
433 9 : proxy->dhcp_servers[0].dhcp_server.ip4.as_u32;
434 9 : clib_memcpy_fast (tr->packet_data, h0,
435 : sizeof (tr->packet_data));
436 : }
437 :
438 0 : do_enqueue:
439 14 : to_next[0] = bi0;
440 14 : to_next += 1;
441 14 : n_left_to_next -= 1;
442 :
443 14 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
444 : to_next, n_left_to_next,
445 : bi0, next0);
446 : }
447 :
448 13 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
449 : }
450 13 : vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
451 : DHCP_PROXY_ERROR_RELAY_TO_CLIENT,
452 : pkts_to_client);
453 13 : vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
454 : DHCP_PROXY_ERROR_RELAY_TO_SERVER,
455 : pkts_to_server);
456 13 : vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
457 : DHCP_PROXY_ERROR_NO_SERVER, pkts_no_server);
458 13 : vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
459 : DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS,
460 : pkts_no_interface_address);
461 13 : vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
462 : DHCP_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
463 13 : return from_frame->n_vectors;
464 : }
465 :
466 : /* *INDENT-OFF* */
467 153836 : VLIB_REGISTER_NODE (dhcp_proxy_to_server_node, static) = {
468 : .function = dhcp_proxy_to_server_input,
469 : .name = "dhcp-proxy-to-server",
470 : /* Takes a vector of packets. */
471 : .vector_size = sizeof (u32),
472 :
473 : .n_errors = DHCP_PROXY_N_ERROR,
474 : .error_strings = dhcp_proxy_error_strings,
475 :
476 : .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
477 : .next_nodes = {
478 : #define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
479 : foreach_dhcp_proxy_to_server_input_next
480 : #undef _
481 : },
482 :
483 : .format_buffer = format_dhcp_proxy_header_with_length,
484 : .format_trace = format_dhcp_proxy_trace,
485 : #if 0
486 : .unformat_buffer = unformat_dhcp_proxy_header,
487 : #endif
488 : };
489 : /* *INDENT-ON* */
490 :
491 : typedef enum
492 : {
493 : DHCP4_PROXY_NEXT_DROP,
494 : DHCP4_PROXY_NEXT_TX,
495 : DHCP4_PROXY_N_NEXT,
496 : } dhcp4_next_t;
497 :
498 : static uword
499 13 : dhcp_proxy_to_client_input (vlib_main_t * vm,
500 : vlib_node_runtime_t * node,
501 : vlib_frame_t * from_frame)
502 : {
503 : u32 n_left_from, *from, *to_next, n_left_to_next;
504 13 : ethernet_main_t *em = vnet_get_ethernet_main ();
505 13 : dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
506 13 : vnet_main_t *vnm = vnet_get_main ();
507 13 : ip4_main_t *im = &ip4_main;
508 : u32 next_index;
509 :
510 13 : from = vlib_frame_vector_args (from_frame);
511 13 : n_left_from = from_frame->n_vectors;
512 13 : next_index = node->cached_next_index;
513 :
514 26 : while (n_left_from > 0)
515 : {
516 13 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
517 :
518 27 : while (n_left_from > 0 && n_left_to_next > 0)
519 : {
520 : u32 bi0;
521 : vlib_buffer_t *b0;
522 : udp_header_t *u0;
523 : dhcp_header_t *h0;
524 14 : ip4_header_t *ip0 = 0;
525 14 : ip4_address_t *ia0 = 0;
526 : u32 old0, new0;
527 : ip_csum_t sum0;
528 : ethernet_interface_t *ei0;
529 : ethernet_header_t *mac0;
530 : vnet_hw_interface_t *hi0;
531 14 : u32 sw_if_index = ~0;
532 : vnet_sw_interface_t *si0;
533 14 : u32 inner_vlan = (u32) ~ 0;
534 14 : u32 outer_vlan = (u32) ~ 0;
535 14 : u32 error0 = (u32) ~ 0;
536 : vnet_sw_interface_t *swif;
537 : u32 fib_index;
538 : dhcp_proxy_t *proxy;
539 : dhcp_server_t *server;
540 14 : u32 original_sw_if_index = (u32) ~ 0;
541 14 : dhcp4_next_t next0 = DHCP4_PROXY_NEXT_TX;
542 14 : ip4_address_t relay_addr = {
543 : .as_u32 = 0,
544 : };
545 :
546 14 : bi0 = to_next[0] = from[0];
547 14 : from += 1;
548 14 : to_next += 1;
549 14 : n_left_from -= 1;
550 14 : n_left_to_next -= 1;
551 :
552 14 : b0 = vlib_get_buffer (vm, bi0);
553 14 : h0 = vlib_buffer_get_current (b0);
554 :
555 : /*
556 : * udp_local hands us the DHCP header, need udp hdr,
557 : * ip hdr to relay to client
558 : */
559 14 : vlib_buffer_advance (b0, -(sizeof (*u0)));
560 14 : u0 = vlib_buffer_get_current (b0);
561 :
562 14 : vlib_buffer_advance (b0, -(sizeof (*ip0)));
563 14 : ip0 = vlib_buffer_get_current (b0);
564 :
565 : /* Consumed by dhcp client code? */
566 14 : if (dhcp_client_for_us (bi0, b0, ip0, u0, h0))
567 : {
568 9 : error0 = DHCP_PROXY_ERROR_FOR_US;
569 9 : goto drop_packet;
570 : }
571 :
572 : // if (1 /* dpm->insert_option_82 */ )
573 : /* linearize needed to "unclone" and scan options */
574 5 : int rv = vlib_buffer_chain_linearize (vm, b0);
575 5 : if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 || !rv)
576 : {
577 0 : error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG;
578 0 : goto drop_packet;
579 : }
580 :
581 5 : dhcp_option_t *o = h0->options, *end =
582 5 : (void *) vlib_buffer_get_tail (b0);
583 :
584 : /* Parse through TLVs looking for option 82.
585 : The circuit-ID is the FIB number we need
586 : to track down the client-facing interface */
587 :
588 15 : while (o->option != DHCP_PACKET_OPTION_END && o < end)
589 : {
590 10 : if (o->option == 82)
591 : {
592 5 : u32 vss_exist = 0;
593 5 : u32 vss_ctrl = 0;
594 5 : dhcp_option_t *sub = (dhcp_option_t *) & o->data[0];
595 5 : dhcp_option_t *subend =
596 5 : (dhcp_option_t *) (o->data + o->length);
597 19 : while (sub->option != DHCP_PACKET_OPTION_END
598 14 : && sub < subend)
599 : {
600 : /* If this is one of ours, it will have
601 : total length 12, circuit-id suboption type,
602 : and the sw_if_index */
603 14 : if (sub->option == 1 && sub->length == 4)
604 : {
605 5 : sw_if_index = ((sub->data[0] << 24) |
606 5 : (sub->data[1] << 16) |
607 5 : (sub->data[2] << 8) |
608 5 : (sub->data[3]));
609 : }
610 9 : else if (sub->option == 5 && sub->length == 4)
611 : {
612 5 : relay_addr.as_u8[0] = sub->data[0];
613 5 : relay_addr.as_u8[1] = sub->data[1];
614 5 : relay_addr.as_u8[2] = sub->data[2];
615 5 : relay_addr.as_u8[3] = sub->data[3];
616 : }
617 4 : else if (sub->option == 151 &&
618 2 : sub->length == 7 && sub->data[0] == 1)
619 0 : vss_exist = 1;
620 4 : else if (sub->option == 152 && sub->length == 0)
621 2 : vss_ctrl = 1;
622 14 : sub = (dhcp_option_t *) (sub->data + sub->length);
623 : }
624 5 : if (vss_ctrl && vss_exist)
625 0 : vlib_node_increment_counter
626 : (vm, dhcp_proxy_to_client_node.index,
627 : DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1);
628 :
629 : }
630 10 : o = (dhcp_option_t *) (o->data + o->length);
631 : }
632 :
633 5 : if (sw_if_index == (u32) ~ 0)
634 : {
635 0 : error0 = DHCP_PROXY_ERROR_NO_OPTION_82;
636 :
637 11 : drop_packet:
638 11 : vlib_node_increment_counter (vm,
639 : dhcp_proxy_to_client_node.index,
640 : error0, 1);
641 11 : b0->error = node->errors[error0];
642 11 : next0 = DHCP4_PROXY_NEXT_DROP;
643 11 : goto do_trace;
644 : }
645 :
646 5 : if (relay_addr.as_u32 == 0)
647 : {
648 0 : error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ADDR;
649 0 : goto drop_packet;
650 : }
651 :
652 5 : if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
653 : {
654 1 : error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ITF;
655 1 : goto drop_packet;
656 : }
657 :
658 4 : fib_index = im->fib_index_by_sw_if_index[sw_if_index];
659 4 : proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
660 :
661 4 : if (PREDICT_FALSE (NULL == proxy))
662 : {
663 0 : error0 = DHCP_PROXY_ERROR_NO_SERVER;
664 0 : goto drop_packet;
665 : }
666 :
667 5 : vec_foreach (server, proxy->dhcp_servers)
668 : {
669 5 : if (ip0->src_address.as_u32 == server->dhcp_server.ip4.as_u32)
670 : {
671 4 : goto server_found;
672 : }
673 : }
674 :
675 0 : error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
676 0 : goto drop_packet;
677 :
678 4 : server_found:
679 4 : vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index;
680 :
681 4 : swif = vnet_get_sw_interface (vnm, sw_if_index);
682 4 : original_sw_if_index = sw_if_index;
683 4 : if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
684 0 : sw_if_index = swif->unnumbered_sw_if_index;
685 :
686 4 : ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
687 4 : if (ia0 == 0)
688 : {
689 0 : error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
690 0 : goto drop_packet;
691 : }
692 :
693 4 : if (relay_addr.as_u32 != ia0->as_u32)
694 : {
695 1 : error0 = DHCP_PROXY_ERROR_BAD_YIADDR;
696 1 : goto drop_packet;
697 : }
698 :
699 3 : u0->checksum = 0;
700 3 : u0->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client);
701 3 : sum0 = ip0->checksum;
702 3 : old0 = ip0->dst_address.as_u32;
703 3 : new0 = 0xFFFFFFFF;
704 3 : ip0->dst_address.as_u32 = new0;
705 : sum0 =
706 3 : ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
707 : dst_address /* offset of changed member */ );
708 3 : ip0->checksum = ip_csum_fold (sum0);
709 :
710 3 : sum0 = ip0->checksum;
711 3 : old0 = ip0->src_address.as_u32;
712 3 : new0 = ia0->as_u32;
713 3 : ip0->src_address.as_u32 = new0;
714 : sum0 =
715 3 : ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
716 : src_address /* offset of changed member */ );
717 3 : ip0->checksum = ip_csum_fold (sum0);
718 :
719 3 : vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
720 3 : si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
721 3 : if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
722 : {
723 0 : if (si0->sub.eth.flags.one_tag == 1)
724 : {
725 0 : vlib_buffer_advance (b0, -4 /* space for 1 VLAN tag */ );
726 0 : outer_vlan = (si0->sub.eth.outer_vlan_id << 16) | 0x0800;
727 : }
728 0 : else if (si0->sub.eth.flags.two_tags == 1)
729 : {
730 0 : vlib_buffer_advance (b0, -8 /* space for 2 VLAN tag */ );
731 0 : outer_vlan = (si0->sub.eth.outer_vlan_id << 16) | 0x8100;
732 0 : inner_vlan = (si0->sub.eth.inner_vlan_id << 16) | 0x0800;
733 : }
734 : }
735 :
736 3 : mac0 = vlib_buffer_get_current (b0);
737 :
738 3 : hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
739 3 : ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
740 3 : clib_memcpy (mac0->src_address, &ei0->address,
741 : sizeof (mac0->src_address));
742 3 : clib_memset (mac0->dst_address, 0xff, sizeof (mac0->dst_address));
743 :
744 3 : if (si0->type == VNET_SW_INTERFACE_TYPE_SUB
745 0 : && outer_vlan != (u32) ~ 0)
746 0 : {
747 0 : mac0->type = (si0->sub.eth.flags.dot1ad == 1) ?
748 0 : clib_net_to_host_u16 (0x88a8) : clib_net_to_host_u16 (0x8100);
749 0 : u32 *vlan_tag = (u32 *) (mac0 + 1);
750 0 : *vlan_tag = clib_host_to_net_u32 (outer_vlan);
751 0 : if (inner_vlan != (u32) ~ 0)
752 : {
753 0 : u32 *inner_vlan_tag = (u32 *) (vlan_tag + 1);
754 0 : *inner_vlan_tag = clib_host_to_net_u32 (inner_vlan);
755 : }
756 : }
757 : else
758 : {
759 3 : mac0->type = clib_net_to_host_u16 (0x0800);
760 : }
761 :
762 14 : do_trace:
763 14 : if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
764 : {
765 14 : dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
766 : b0, sizeof (*tr));
767 14 : tr->which = 1; /* to client */
768 14 : tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0;
769 14 : tr->error = error0;
770 14 : tr->original_sw_if_index = original_sw_if_index;
771 14 : tr->sw_if_index = sw_if_index;
772 14 : clib_memcpy_fast (tr->packet_data, h0,
773 : sizeof (tr->packet_data));
774 : }
775 :
776 14 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
777 : to_next, n_left_to_next,
778 : bi0, next0);
779 : }
780 13 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
781 : }
782 :
783 13 : return from_frame->n_vectors;
784 : }
785 :
786 : /* *INDENT-OFF* */
787 153836 : VLIB_REGISTER_NODE (dhcp_proxy_to_client_node, static) = {
788 : .function = dhcp_proxy_to_client_input,
789 : .name = "dhcp-proxy-to-client",
790 : /* Takes a vector of packets. */
791 : .vector_size = sizeof (u32),
792 :
793 : .n_errors = DHCP_PROXY_N_ERROR,
794 : .error_strings = dhcp_proxy_error_strings,
795 : .format_buffer = format_dhcp_proxy_header_with_length,
796 : .format_trace = format_dhcp_proxy_trace,
797 : #if 0
798 : .unformat_buffer = unformat_dhcp_proxy_header,
799 : #endif
800 : .n_next_nodes = DHCP4_PROXY_N_NEXT,
801 : .next_nodes = {
802 : [DHCP4_PROXY_NEXT_DROP] = "error-drop",
803 : [DHCP4_PROXY_NEXT_TX] = "interface-output",
804 : },
805 : };
806 : /* *INDENT-ON* */
807 :
808 : void
809 13 : dhcp_maybe_register_udp_ports (dhcp_port_reg_flags_t ports)
810 : {
811 13 : dhcp_proxy_main_t *dm = &dhcp_proxy_main;
812 13 : vlib_main_t *vm = dm->vlib_main;
813 13 : int port_regs_diff = dm->udp_ports_registered ^ ports;
814 :
815 13 : if (!port_regs_diff)
816 11 : return;
817 :
818 2 : if ((port_regs_diff & DHCP_PORT_REG_CLIENT) & ports)
819 1 : udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client,
820 : dhcp_proxy_to_client_node.index, 1 /* is_ip4 */ );
821 :
822 2 : if ((port_regs_diff & DHCP_PORT_REG_SERVER) & ports)
823 1 : udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server,
824 : dhcp_proxy_to_server_node.index, 1 /* is_ip4 */ );
825 :
826 2 : dm->udp_ports_registered |= ports;
827 : }
828 :
829 : static clib_error_t *
830 575 : dhcp4_proxy_init (vlib_main_t * vm)
831 : {
832 575 : dhcp_proxy_main_t *dm = &dhcp_proxy_main;
833 : vlib_node_t *error_drop_node;
834 :
835 575 : error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
836 575 : dm->error_drop_node_index = error_drop_node->index;
837 575 : dm->vlib_main = vm;
838 :
839 575 : return 0;
840 : }
841 :
842 :
843 1151 : VLIB_INIT_FUNCTION (dhcp4_proxy_init);
844 :
845 : int
846 8 : dhcp4_proxy_set_server (ip46_address_t * addr,
847 : ip46_address_t * src_addr,
848 : u32 rx_table_id, u32 server_table_id, int is_del)
849 : {
850 8 : u32 rx_fib_index = 0;
851 8 : int rc = 0;
852 :
853 8 : const fib_prefix_t all_1s = {
854 : .fp_len = 32,
855 : .fp_addr.ip4.as_u32 = 0xffffffff,
856 : .fp_proto = FIB_PROTOCOL_IP4,
857 : };
858 :
859 8 : if (ip46_address_is_zero (addr))
860 0 : return VNET_API_ERROR_INVALID_DST_ADDRESS;
861 :
862 8 : if (ip46_address_is_zero (src_addr))
863 0 : return VNET_API_ERROR_INVALID_SRC_ADDRESS;
864 :
865 8 : dhcp_maybe_register_udp_ports (DHCP_PORT_REG_CLIENT | DHCP_PORT_REG_SERVER);
866 :
867 8 : rx_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
868 : rx_table_id,
869 : FIB_SOURCE_DHCP);
870 :
871 8 : if (is_del)
872 : {
873 4 : if (dhcp_proxy_server_del (FIB_PROTOCOL_IP4, rx_fib_index,
874 : addr, server_table_id))
875 : {
876 3 : fib_table_entry_special_remove (rx_fib_index,
877 : &all_1s, FIB_SOURCE_DHCP);
878 3 : fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
879 : }
880 : }
881 : else
882 : {
883 4 : if (dhcp_proxy_server_add (FIB_PROTOCOL_IP4,
884 : addr, src_addr,
885 : rx_fib_index, server_table_id))
886 : {
887 3 : fib_table_entry_special_add (rx_fib_index,
888 : &all_1s,
889 : FIB_SOURCE_DHCP, FIB_ENTRY_FLAG_LOCAL);
890 3 : fib_table_lock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
891 : }
892 : }
893 8 : fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
894 :
895 8 : return (rc);
896 : }
897 :
898 : static clib_error_t *
899 0 : dhcp4_proxy_set_command_fn (vlib_main_t * vm,
900 : unformat_input_t * input,
901 : vlib_cli_command_t * cmd)
902 : {
903 : ip46_address_t server_addr, src_addr;
904 0 : u32 server_table_id = 0, rx_table_id = 0;
905 0 : int is_del = 0;
906 0 : int set_src = 0, set_server = 0;
907 :
908 0 : clib_memset (&server_addr, 0, sizeof (server_addr));
909 0 : clib_memset (&src_addr, 0, sizeof (src_addr));
910 :
911 0 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
912 : {
913 0 : if (unformat (input, "server %U",
914 : unformat_ip4_address, &server_addr.ip4))
915 0 : set_server = 1;
916 0 : else if (unformat (input, "server-fib-id %d", &server_table_id))
917 : ;
918 0 : else if (unformat (input, "rx-fib-id %d", &rx_table_id))
919 : ;
920 0 : else if (unformat (input, "src-address %U",
921 : unformat_ip4_address, &src_addr.ip4))
922 0 : set_src = 1;
923 0 : else if (unformat (input, "delete") || unformat (input, "del"))
924 0 : is_del = 1;
925 : else
926 : break;
927 : }
928 :
929 0 : if (is_del || (set_server && set_src))
930 : {
931 : int rv;
932 :
933 0 : rv = dhcp4_proxy_set_server (&server_addr, &src_addr, rx_table_id,
934 : server_table_id, is_del);
935 0 : switch (rv)
936 : {
937 0 : case 0:
938 0 : return 0;
939 :
940 0 : case VNET_API_ERROR_INVALID_DST_ADDRESS:
941 0 : return clib_error_return (0, "Invalid server address");
942 :
943 0 : case VNET_API_ERROR_INVALID_SRC_ADDRESS:
944 0 : return clib_error_return (0, "Invalid src address");
945 :
946 0 : case VNET_API_ERROR_NO_SUCH_ENTRY:
947 0 : return clib_error_return
948 : (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
949 :
950 0 : default:
951 0 : return clib_error_return (0, "BUG: rv %d", rv);
952 : }
953 : }
954 : else
955 0 : return clib_error_return (0, "parse error`%U'",
956 : format_unformat_error, input);
957 : }
958 :
959 : /* *INDENT-OFF* */
960 235753 : VLIB_CLI_COMMAND (dhcp_proxy_set_command, static) = {
961 : .path = "set dhcp proxy",
962 : .short_help = "set dhcp proxy [del] server <ip-addr> src-address <ip-addr> [server-fib-id <n>] [rx-fib-id <n>]",
963 : .function = dhcp4_proxy_set_command_fn,
964 : };
965 : /* *INDENT-ON* */
966 :
967 : static u8 *
968 0 : format_dhcp4_proxy_server (u8 * s, va_list * args)
969 : {
970 0 : dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
971 : ip4_fib_t *rx_fib, *server_fib;
972 : dhcp_server_t *server;
973 :
974 0 : if (proxy == 0)
975 : {
976 0 : s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
977 : "Servers FIB,Address");
978 0 : return s;
979 : }
980 :
981 0 : rx_fib = ip4_fib_get (proxy->rx_fib_index);
982 :
983 0 : s = format (s, "%=14u%=16U", rx_fib->hash.table_id, format_ip46_address,
984 : &proxy->dhcp_src_address, IP46_TYPE_ANY);
985 :
986 0 : vec_foreach (server, proxy->dhcp_servers)
987 : {
988 0 : server_fib = ip4_fib_get (server->server_fib_index);
989 0 : s = format (s, "%u,%U ", server_fib->hash.table_id, format_ip46_address,
990 : &server->dhcp_server, IP46_TYPE_ANY);
991 : }
992 0 : return s;
993 : }
994 :
995 : static int
996 0 : dhcp4_proxy_show_walk (dhcp_proxy_t * server, void *ctx)
997 : {
998 0 : vlib_main_t *vm = ctx;
999 :
1000 0 : vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, server);
1001 :
1002 0 : return (1);
1003 : }
1004 :
1005 : static clib_error_t *
1006 0 : dhcp4_proxy_show_command_fn (vlib_main_t * vm,
1007 : unformat_input_t * input,
1008 : vlib_cli_command_t * cmd)
1009 : {
1010 0 : vlib_cli_output (vm, "%U", format_dhcp4_proxy_server,
1011 : NULL /* header line */ );
1012 :
1013 0 : dhcp_proxy_walk (FIB_PROTOCOL_IP4, dhcp4_proxy_show_walk, vm);
1014 :
1015 0 : return (NULL);
1016 : }
1017 :
1018 : /* *INDENT-OFF* */
1019 235753 : VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = {
1020 : .path = "show dhcp proxy",
1021 : .short_help = "Display dhcp proxy server info",
1022 : .function = dhcp4_proxy_show_command_fn,
1023 : };
1024 : /* *INDENT-ON* */
1025 :
1026 : static clib_error_t *
1027 0 : dhcp_option_82_vss_fn (vlib_main_t * vm,
1028 : unformat_input_t * input, vlib_cli_command_t * cmd)
1029 : {
1030 0 : u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
1031 0 : u32 oui = 0, fib_id = 0, tbl_id = ~0;
1032 0 : u8 *vpn_ascii_id = 0;
1033 :
1034 0 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1035 : {
1036 0 : if (unformat (input, "table %d", &tbl_id))
1037 : ;
1038 0 : else if (unformat (input, "oui %d", &oui))
1039 0 : vss_type = VSS_TYPE_VPN_ID;
1040 0 : else if (unformat (input, "vpn-id %d", &fib_id))
1041 0 : vss_type = VSS_TYPE_VPN_ID;
1042 0 : else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
1043 0 : vss_type = VSS_TYPE_ASCII;
1044 0 : else if (unformat (input, "delete") || unformat (input, "del"))
1045 0 : is_del = 1;
1046 : else
1047 : break;
1048 : }
1049 :
1050 0 : if (tbl_id == ~0)
1051 0 : return clib_error_return (0, "no table ID specified.");
1052 :
1053 0 : int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP4, tbl_id, vss_type,
1054 : vpn_ascii_id, oui, fib_id, is_del);
1055 0 : switch (rv)
1056 : {
1057 0 : case 0:
1058 0 : return 0;
1059 0 : case VNET_API_ERROR_NO_SUCH_ENTRY:
1060 0 : return clib_error_return (0,
1061 : "option 82 vss for table %d not found in in pool.",
1062 : tbl_id);
1063 0 : default:
1064 0 : return clib_error_return (0, "BUG: rv %d", rv);
1065 :
1066 : }
1067 : }
1068 :
1069 : /* *INDENT-OFF* */
1070 235753 : VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = {
1071 : .path = "set dhcp option-82 vss",
1072 : .short_help = "set dhcp option-82 vss [del] table <table id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
1073 : .function = dhcp_option_82_vss_fn,
1074 : };
1075 : /* *INDENT-ON* */
1076 :
1077 : static clib_error_t *
1078 0 : dhcp_vss_show_command_fn (vlib_main_t * vm,
1079 : unformat_input_t * input, vlib_cli_command_t * cmd)
1080 : {
1081 0 : dhcp_vss_walk (FIB_PROTOCOL_IP4, dhcp_vss_show_walk, vm);
1082 :
1083 0 : return (NULL);
1084 : }
1085 :
1086 : /* *INDENT-OFF* */
1087 235753 : VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = {
1088 : .path = "show dhcp vss",
1089 : .short_help = "show dhcp VSS",
1090 : .function = dhcp_vss_show_command_fn,
1091 : };
1092 : /* *INDENT-ON* */
1093 :
1094 : static clib_error_t *
1095 0 : dhcp_option_82_address_show_command_fn (vlib_main_t * vm,
1096 : unformat_input_t * input,
1097 : vlib_cli_command_t * cmd)
1098 : {
1099 0 : vnet_main_t *vnm = vnet_get_main ();
1100 0 : u32 sw_if_index0 = 0, sw_if_index;
1101 : vnet_sw_interface_t *swif;
1102 : ip4_address_t *ia0;
1103 :
1104 0 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1105 : {
1106 :
1107 0 : if (unformat (input, "%U",
1108 : unformat_vnet_sw_interface, vnm, &sw_if_index0))
1109 : {
1110 0 : swif = vnet_get_sw_interface (vnm, sw_if_index0);
1111 0 : sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1112 0 : swif->unnumbered_sw_if_index : sw_if_index0;
1113 0 : ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
1114 0 : if (ia0)
1115 : {
1116 0 : vlib_cli_output (vm, "%=20s%=20s", "interface",
1117 : "source IP address");
1118 :
1119 0 : vlib_cli_output (vm, "%=20U%=20U",
1120 : format_vnet_sw_if_index_name,
1121 : vnm, sw_if_index0, format_ip4_address, ia0);
1122 : }
1123 : else
1124 0 : vlib_cli_output (vm, "%=34s %=20U",
1125 : "No IPv4 address configured on",
1126 : format_vnet_sw_if_index_name, vnm, sw_if_index);
1127 : }
1128 : else
1129 0 : break;
1130 : }
1131 :
1132 0 : return 0;
1133 : }
1134 :
1135 : /* *INDENT-OFF* */
1136 235753 : VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = {
1137 : .path = "show dhcp option-82-address interface",
1138 : .short_help = "show dhcp option-82-address interface <interface>",
1139 : .function = dhcp_option_82_address_show_command_fn,
1140 : };
1141 : /* *INDENT-ON* */
1142 :
1143 : /*
1144 : * fd.io coding-style-patch-verification: ON
1145 : *
1146 : * Local Variables:
1147 : * eval: (c-set-style "gnu")
1148 : * End:
1149 : */
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