blob: 99e5a739f74c8ba671a008e3b519ef72c57096b7 [file] [log] [blame]
Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
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 <vnet/pg/pg.h>
Neale Ranns2dd68522017-02-16 03:38:59 -080020#include <vnet/dhcp/dhcp_proxy.h>
Neale Ranns20a175a2017-02-14 07:28:41 -080021#include <vnet/dhcp/client.h>
Neale Ranns0bfe5d82016-08-25 15:29:12 +010022#include <vnet/fib/ip4_fib.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070023
khemendra kumar34719e32017-12-08 18:06:52 +053024static char *dhcp_proxy_error_strings[] = {
Ed Warnickecb9cada2015-12-08 15:45:58 -070025#define dhcp_proxy_error(n,s) s,
Neale Ranns2dd68522017-02-16 03:38:59 -080026#include <vnet/dhcp/dhcp4_proxy_error.def>
Ed Warnickecb9cada2015-12-08 15:45:58 -070027#undef dhcp_proxy_error
28};
29
30#define foreach_dhcp_proxy_to_server_input_next \
31 _ (DROP, "error-drop") \
32 _ (LOOKUP, "ip4-lookup") \
33 _ (SEND_TO_CLIENT, "dhcp-proxy-to-client")
34
khemendra kumar34719e32017-12-08 18:06:52 +053035typedef enum
36{
Ed Warnickecb9cada2015-12-08 15:45:58 -070037#define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s,
38 foreach_dhcp_proxy_to_server_input_next
39#undef _
khemendra kumar34719e32017-12-08 18:06:52 +053040 DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
Ed Warnickecb9cada2015-12-08 15:45:58 -070041} dhcp_proxy_to_server_input_next_t;
42
khemendra kumar34719e32017-12-08 18:06:52 +053043typedef struct
44{
Ed Warnickecb9cada2015-12-08 15:45:58 -070045 /* 0 => to server, 1 => to client */
khemendra kumar34719e32017-12-08 18:06:52 +053046 int which;
Ed Warnickecb9cada2015-12-08 15:45:58 -070047 ip4_address_t trace_ip4_address;
48 u32 error;
49 u32 sw_if_index;
50 u32 original_sw_if_index;
51} dhcp_proxy_trace_t;
52
53#define VPP_DHCP_OPTION82_SUB1_SIZE 6
54#define VPP_DHCP_OPTION82_SUB5_SIZE 6
55#define VPP_DHCP_OPTION82_VSS_SIZE 12
56#define VPP_DHCP_OPTION82_SIZE (VPP_DHCP_OPTION82_SUB1_SIZE + \
57 VPP_DHCP_OPTION82_SUB5_SIZE + \
58 VPP_DHCP_OPTION82_VSS_SIZE +3)
59
Neale Ranns2dd68522017-02-16 03:38:59 -080060static vlib_node_registration_t dhcp_proxy_to_server_node;
61static vlib_node_registration_t dhcp_proxy_to_client_node;
Ed Warnickecb9cada2015-12-08 15:45:58 -070062
Neale Ranns2dd68522017-02-16 03:38:59 -080063static u8 *
64format_dhcp_proxy_trace (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070065{
66 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
67 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
khemendra kumar34719e32017-12-08 18:06:52 +053068 dhcp_proxy_trace_t *t = va_arg (*args, dhcp_proxy_trace_t *);
69
Ed Warnickecb9cada2015-12-08 15:45:58 -070070 if (t->which == 0)
71 s = format (s, "DHCP proxy: sent to server %U\n",
khemendra kumar34719e32017-12-08 18:06:52 +053072 format_ip4_address, &t->trace_ip4_address, t->error);
Ed Warnickecb9cada2015-12-08 15:45:58 -070073 else
74 s = format (s, "DHCP proxy: broadcast to client from %U\n",
khemendra kumar34719e32017-12-08 18:06:52 +053075 format_ip4_address, &t->trace_ip4_address);
76
77 if (t->error != (u32) ~ 0)
Ed Warnickecb9cada2015-12-08 15:45:58 -070078 s = format (s, " error: %s\n", dhcp_proxy_error_strings[t->error]);
79
80 s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
khemendra kumar34719e32017-12-08 18:06:52 +053081 t->original_sw_if_index, t->sw_if_index);
82
Ed Warnickecb9cada2015-12-08 15:45:58 -070083 return s;
84}
85
Neale Ranns2dd68522017-02-16 03:38:59 -080086static u8 *
87format_dhcp_proxy_header_with_length (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070088{
khemendra kumar34719e32017-12-08 18:06:52 +053089 dhcp_header_t *h = va_arg (*args, dhcp_header_t *);
Ed Warnickecb9cada2015-12-08 15:45:58 -070090 u32 max_header_bytes = va_arg (*args, u32);
91 u32 header_bytes;
92
93 header_bytes = sizeof (h[0]);
94 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
95 return format (s, "dhcp header truncated");
96
97 s = format (s, "DHCP Proxy");
98
99 return s;
100}
101
Ed Warnickecb9cada2015-12-08 15:45:58 -0700102static uword
103dhcp_proxy_to_server_input (vlib_main_t * vm,
khemendra kumar34719e32017-12-08 18:06:52 +0530104 vlib_node_runtime_t * node,
105 vlib_frame_t * from_frame)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700106{
khemendra kumar34719e32017-12-08 18:06:52 +0530107 u32 n_left_from, next_index, *from, *to_next;
108 dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700109 from = vlib_frame_vector_args (from_frame);
110 n_left_from = from_frame->n_vectors;
khemendra kumar34719e32017-12-08 18:06:52 +0530111 u32 pkts_to_server = 0, pkts_to_client = 0, pkts_no_server = 0;
112 u32 pkts_no_interface_address = 0;
113 u32 pkts_too_big = 0;
114 ip4_main_t *im = &ip4_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700115
116 next_index = node->cached_next_index;
117
118 while (n_left_from > 0)
119 {
120 u32 n_left_to_next;
121
khemendra kumar34719e32017-12-08 18:06:52 +0530122 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700123
124 while (n_left_from > 0 && n_left_to_next > 0)
125 {
126 u32 bi0;
khemendra kumar34719e32017-12-08 18:06:52 +0530127 vlib_buffer_t *b0;
128 udp_header_t *u0;
129 dhcp_header_t *h0;
130 ip4_header_t *ip0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700131 u32 next0;
khemendra kumar34719e32017-12-08 18:06:52 +0530132 u32 old0, new0;
133 ip_csum_t sum0;
134 u32 error0 = (u32) ~ 0;
135 u32 sw_if_index = 0;
136 u32 original_sw_if_index = 0;
137 u8 *end = NULL;
138 u32 fib_index;
139 dhcp_proxy_t *proxy;
140 dhcp_server_t *server;
141 u32 rx_sw_if_index;
142 dhcp_option_t *o;
143 u32 len = 0;
144 vlib_buffer_free_list_t *fl;
145 u8 is_discover = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700146
147 bi0 = from[0];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700148 from += 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700149 n_left_from -= 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700150
151 b0 = vlib_get_buffer (vm, bi0);
152
khemendra kumar34719e32017-12-08 18:06:52 +0530153 h0 = vlib_buffer_get_current (b0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700154
khemendra kumar34719e32017-12-08 18:06:52 +0530155 /*
156 * udp_local hands us the DHCP header, need udp hdr,
157 * ip hdr to relay to server
158 */
159 vlib_buffer_advance (b0, -(sizeof (*u0)));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700160 u0 = vlib_buffer_get_current (b0);
161
khemendra kumar34719e32017-12-08 18:06:52 +0530162 /* This blows. Return traffic has src_port = 67, dst_port = 67 */
163 if (u0->src_port ==
164 clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_server))
165 {
166 vlib_buffer_advance (b0, sizeof (*u0));
167 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
168 error0 = 0;
169 pkts_to_client++;
170 goto do_enqueue;
John Lo70bfcaf2017-11-14 13:19:26 -0500171 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700172
khemendra kumar34719e32017-12-08 18:06:52 +0530173 rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
174
175 fib_index = im->fib_index_by_sw_if_index[rx_sw_if_index];
176 proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
177
178 if (PREDICT_FALSE (NULL == proxy))
179 {
180 error0 = DHCP_PROXY_ERROR_NO_SERVER;
181 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
182 pkts_no_server++;
183 goto do_trace;
John Lo70bfcaf2017-11-14 13:19:26 -0500184 }
Neale Ranns20a175a2017-02-14 07:28:41 -0800185
khemendra kumar34719e32017-12-08 18:06:52 +0530186 server = &proxy->dhcp_servers[0];
187 vlib_buffer_advance (b0, -(sizeof (*ip0)));
188 ip0 = vlib_buffer_get_current (b0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700189
khemendra kumar34719e32017-12-08 18:06:52 +0530190 /* disable UDP checksum */
191 u0->checksum = 0;
192 sum0 = ip0->checksum;
193 old0 = ip0->dst_address.as_u32;
194 new0 = server->dhcp_server.ip4.as_u32;
195 ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32;
196 sum0 = ip_csum_update (sum0, old0, new0,
197 ip4_header_t /* structure */ ,
198 dst_address /* changed member */ );
199 ip0->checksum = ip_csum_fold (sum0);
200
201 sum0 = ip0->checksum;
202 old0 = ip0->src_address.as_u32;
203 new0 = proxy->dhcp_src_address.ip4.as_u32;
204 ip0->src_address.as_u32 = new0;
205 sum0 = ip_csum_update (sum0, old0, new0,
206 ip4_header_t /* structure */ ,
207 src_address /* changed member */ );
208 ip0->checksum = ip_csum_fold (sum0);
209
210 /* Send to DHCP server via the configured FIB */
211 vnet_buffer (b0)->sw_if_index[VLIB_TX] = server->server_fib_index;
212
213 h0->gateway_ip_address.as_u32 = proxy->dhcp_src_address.ip4.as_u32;
214 pkts_to_server++;
215
216 o = (dhcp_option_t *) h0->options;
217
218 fib_index = im->fib_index_by_sw_if_index
219 [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
220
221 end = b0->data + b0->current_data + b0->current_length;
222 /* TLVs are not performance-friendly... */
223 while (o->option != 0xFF /* end of options */ && (u8 *) o < end)
224 {
225 if (DHCP_PACKET_OPTION_MSG_TYPE == o->option)
226 {
227 if (DHCP_PACKET_DISCOVER == o->data[0])
228 {
229 is_discover = 1;
230 }
231 }
232 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
233 }
234
235 fl =
236 vlib_buffer_get_free_list (vm,
237 vlib_buffer_get_free_list_index (b0));
238 // start write at (option*)o, some packets have padding
239 if (((u8 *) o - (u8 *) b0->data + VPP_DHCP_OPTION82_SIZE) >
240 fl->n_data_bytes)
241 {
242 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
243 pkts_too_big++;
244 goto do_trace;
245 }
246
247 if ((o->option == 0xFF) && ((u8 *) o <= end))
248 {
249 vnet_main_t *vnm = vnet_get_main ();
250 u16 old_l0, new_l0;
251 ip4_address_t _ia0, *ia0 = &_ia0;
252 dhcp_vss_t *vss;
253 vnet_sw_interface_t *swif;
254 sw_if_index = 0;
255 original_sw_if_index = 0;
256
257 original_sw_if_index = sw_if_index =
258 vnet_buffer (b0)->sw_if_index[VLIB_RX];
259 swif = vnet_get_sw_interface (vnm, sw_if_index);
260 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
261 sw_if_index = swif->unnumbered_sw_if_index;
262
263 /*
264 * Get the first ip4 address on the [client-side]
265 * RX interface, if not unnumbered. otherwise use
266 * the loopback interface's ip address.
267 */
268 ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
269
270 if (ia0 == 0)
271 {
272 error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
273 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
274 pkts_no_interface_address++;
275 goto do_trace;
276 }
277
278 /* Add option 82 */
279 o->option = 82; /* option 82 */
280 o->length = 12; /* 12 octets to follow */
281 o->data[0] = 1; /* suboption 1, circuit ID (=FIB id) */
282 o->data[1] = 4; /* length of suboption */
283 u32 *o_ifid = (u32 *) & o->data[2];
John Lo70bfcaf2017-11-14 13:19:26 -0500284 *o_ifid = clib_host_to_net_u32 (original_sw_if_index);
khemendra kumar34719e32017-12-08 18:06:52 +0530285 o->data[6] = 5; /* suboption 5 (client RX intfc address) */
286 o->data[7] = 4; /* length 4 */
287 u32 *o_addr = (u32 *) & o->data[8];
John Lo70bfcaf2017-11-14 13:19:26 -0500288 *o_addr = ia0->as_u32;
khemendra kumar34719e32017-12-08 18:06:52 +0530289 o->data[12] = 0xFF;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700290
khemendra kumar34719e32017-12-08 18:06:52 +0530291 vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4);
292 if (vss)
293 {
294 u32 id_len; /* length of VPN ID */
Neale Ranns20a175a2017-02-14 07:28:41 -0800295
John Lo70bfcaf2017-11-14 13:19:26 -0500296 if (vss->vss_type == VSS_TYPE_VPN_ID)
297 {
298 id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
299 memcpy (&o->data[15], vss->vpn_id, id_len);
300 }
301 else if (vss->vss_type == VSS_TYPE_ASCII)
302 {
303 id_len = vec_len (vss->vpn_ascii_id);
304 memcpy (&o->data[15], vss->vpn_ascii_id, id_len);
305 }
khemendra kumar34719e32017-12-08 18:06:52 +0530306 else /* must be VSS_TYPE_DEFAULT, no VPN ID */
307 id_len = 0;
Neale Ranns20a175a2017-02-14 07:28:41 -0800308
khemendra kumar34719e32017-12-08 18:06:52 +0530309 o->data[12] = 151; /* vss suboption */
John Lo70bfcaf2017-11-14 13:19:26 -0500310 o->data[13] = id_len + 1; /* length: vss_type + id_len */
311 o->data[14] = vss->vss_type; /* vss option type */
312 o->data[15 + id_len] = 152; /* vss control suboption */
313 o->data[16 + id_len] = 0; /* length */
314 o->data[17 + id_len] = 0xFF; /* "end-of-options" (0xFF) */
315 /* 5 bytes for suboption headers 151+len, 152+len and 0xFF */
khemendra kumar34719e32017-12-08 18:06:52 +0530316 o->length += id_len + 5;
317 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700318
khemendra kumar34719e32017-12-08 18:06:52 +0530319 len = o->length + 3;
320 b0->current_length += len;
321 /* Fix IP header length and checksum */
322 old_l0 = ip0->length;
323 new_l0 = clib_net_to_host_u16 (old_l0);
324 new_l0 += len;
325 new_l0 = clib_host_to_net_u16 (new_l0);
326 ip0->length = new_l0;
327 sum0 = ip0->checksum;
328 sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
329 length /* changed member */ );
330 ip0->checksum = ip_csum_fold (sum0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700331
khemendra kumar34719e32017-12-08 18:06:52 +0530332 /* Fix UDP length */
333 new_l0 = clib_net_to_host_u16 (u0->length);
334 new_l0 += len;
335 u0->length = clib_host_to_net_u16 (new_l0);
John Lo70bfcaf2017-11-14 13:19:26 -0500336 }
khemendra kumar34719e32017-12-08 18:06:52 +0530337 else
338 {
339 vlib_node_increment_counter
340 (vm, dhcp_proxy_to_server_node.index,
341 DHCP_PROXY_ERROR_OPTION_82_ERROR, 1);
342 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700343
khemendra kumar34719e32017-12-08 18:06:52 +0530344 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
Neale Ranns3466c302017-02-16 07:45:03 -0800345
khemendra kumar34719e32017-12-08 18:06:52 +0530346 /*
347 * If we have multiple servers configured and this is the
348 * client's discover message, then send copies to each of
349 * those servers
350 */
351 if (is_discover && vec_len (proxy->dhcp_servers) > 1)
352 {
353 u32 ii;
Neale Ranns3466c302017-02-16 07:45:03 -0800354
khemendra kumar34719e32017-12-08 18:06:52 +0530355 for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
356 {
357 vlib_buffer_t *c0;
358 u32 ci0;
Neale Ranns3466c302017-02-16 07:45:03 -0800359
khemendra kumar34719e32017-12-08 18:06:52 +0530360 c0 = vlib_buffer_copy (vm, b0);
361 ci0 = vlib_get_buffer_index (vm, c0);
362 server = &proxy->dhcp_servers[ii];
Neale Ranns3466c302017-02-16 07:45:03 -0800363
khemendra kumar34719e32017-12-08 18:06:52 +0530364 ip0 = vlib_buffer_get_current (c0);
Neale Ranns3466c302017-02-16 07:45:03 -0800365
khemendra kumar34719e32017-12-08 18:06:52 +0530366 sum0 = ip0->checksum;
367 old0 = ip0->dst_address.as_u32;
368 new0 = server->dhcp_server.ip4.as_u32;
369 ip0->dst_address.as_u32 = server->dhcp_server.ip4.as_u32;
370 sum0 = ip_csum_update (sum0, old0, new0,
371 ip4_header_t /* structure */ ,
372 dst_address /* changed member */ );
373 ip0->checksum = ip_csum_fold (sum0);
Neale Ranns3466c302017-02-16 07:45:03 -0800374
khemendra kumar34719e32017-12-08 18:06:52 +0530375 to_next[0] = ci0;
376 to_next += 1;
377 n_left_to_next -= 1;
Neale Ranns3466c302017-02-16 07:45:03 -0800378
khemendra kumar34719e32017-12-08 18:06:52 +0530379 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
380 to_next, n_left_to_next,
381 ci0, next0);
382
383 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
384 {
385 dhcp_proxy_trace_t *tr;
386
387 tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
388 tr->which = 0; /* to server */
389 tr->error = error0;
390 tr->original_sw_if_index = original_sw_if_index;
391 tr->sw_if_index = sw_if_index;
392 if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
393 tr->trace_ip4_address.as_u32 =
394 server->dhcp_server.ip4.as_u32;
John Lo70bfcaf2017-11-14 13:19:26 -0500395 }
Neale Ranns3466c302017-02-16 07:45:03 -0800396
khemendra kumar34719e32017-12-08 18:06:52 +0530397 if (PREDICT_FALSE (0 == n_left_to_next))
398 {
399 vlib_put_next_frame (vm, node, next_index,
400 n_left_to_next);
401 vlib_get_next_frame (vm, node, next_index,
402 to_next, n_left_to_next);
403 }
404 }
405 }
406 do_trace:
407 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
408 {
409 dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
410 b0, sizeof (*tr));
411 tr->which = 0; /* to server */
412 tr->error = error0;
413 tr->original_sw_if_index = original_sw_if_index;
414 tr->sw_if_index = sw_if_index;
415 if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
416 tr->trace_ip4_address.as_u32 =
417 proxy->dhcp_servers[0].dhcp_server.ip4.as_u32;
418 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700419
khemendra kumar34719e32017-12-08 18:06:52 +0530420 do_enqueue:
Neale Ranns3466c302017-02-16 07:45:03 -0800421 to_next[0] = bi0;
422 to_next += 1;
423 n_left_to_next -= 1;
424
Ed Warnickecb9cada2015-12-08 15:45:58 -0700425 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
426 to_next, n_left_to_next,
427 bi0, next0);
428 }
429
430 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
431 }
432
433 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
khemendra kumar34719e32017-12-08 18:06:52 +0530434 DHCP_PROXY_ERROR_RELAY_TO_CLIENT,
435 pkts_to_client);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700436 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
khemendra kumar34719e32017-12-08 18:06:52 +0530437 DHCP_PROXY_ERROR_RELAY_TO_SERVER,
438 pkts_to_server);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700439 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
khemendra kumar34719e32017-12-08 18:06:52 +0530440 DHCP_PROXY_ERROR_NO_SERVER, pkts_no_server);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700441 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
khemendra kumar34719e32017-12-08 18:06:52 +0530442 DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS,
443 pkts_no_interface_address);
444 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
445 DHCP_PROXY_ERROR_PKT_TOO_BIG, pkts_too_big);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700446 return from_frame->n_vectors;
447}
448
khemendra kumar34719e32017-12-08 18:06:52 +0530449/* *INDENT-OFF* */
Neale Ranns2dd68522017-02-16 03:38:59 -0800450VLIB_REGISTER_NODE (dhcp_proxy_to_server_node, static) = {
Ed Warnickecb9cada2015-12-08 15:45:58 -0700451 .function = dhcp_proxy_to_server_input,
452 .name = "dhcp-proxy-to-server",
453 /* Takes a vector of packets. */
454 .vector_size = sizeof (u32),
455
456 .n_errors = DHCP_PROXY_N_ERROR,
457 .error_strings = dhcp_proxy_error_strings,
458
459 .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
460 .next_nodes = {
461#define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
462 foreach_dhcp_proxy_to_server_input_next
463#undef _
464 },
465
466 .format_buffer = format_dhcp_proxy_header_with_length,
467 .format_trace = format_dhcp_proxy_trace,
468#if 0
469 .unformat_buffer = unformat_dhcp_proxy_header,
470#endif
471};
khemendra kumar34719e32017-12-08 18:06:52 +0530472/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700473
474static uword
475dhcp_proxy_to_client_input (vlib_main_t * vm,
khemendra kumar34719e32017-12-08 18:06:52 +0530476 vlib_node_runtime_t * node,
477 vlib_frame_t * from_frame)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700478{
khemendra kumar34719e32017-12-08 18:06:52 +0530479 u32 n_left_from, *from;
Matthew Smith7a192832018-02-10 11:11:45 -0600480 ethernet_main_t *em = vnet_get_ethernet_main ();
khemendra kumar34719e32017-12-08 18:06:52 +0530481 dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
482 vnet_main_t *vnm = vnet_get_main ();
483 ip4_main_t *im = &ip4_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700484
485 from = vlib_frame_vector_args (from_frame);
486 n_left_from = from_frame->n_vectors;
487
488 while (n_left_from > 0)
489 {
490 u32 bi0;
khemendra kumar34719e32017-12-08 18:06:52 +0530491 vlib_buffer_t *b0;
492 udp_header_t *u0;
493 dhcp_header_t *h0;
494 ip4_header_t *ip0 = 0;
495 ip4_address_t *ia0 = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700496 u32 old0, new0;
497 ip_csum_t sum0;
498 ethernet_interface_t *ei0;
499 ethernet_header_t *mac0;
500 vnet_hw_interface_t *hi0;
501 vlib_frame_t *f0;
khemendra kumar34719e32017-12-08 18:06:52 +0530502 u32 *to_next0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700503 u32 sw_if_index = ~0;
504 vnet_sw_interface_t *si0;
khemendra kumar34719e32017-12-08 18:06:52 +0530505 u32 error0 = (u32) ~ 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700506 vnet_sw_interface_t *swif;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700507 u32 fib_index;
Neale Ranns3466c302017-02-16 07:45:03 -0800508 dhcp_proxy_t *proxy;
509 dhcp_server_t *server;
khemendra kumar34719e32017-12-08 18:06:52 +0530510 u32 original_sw_if_index = (u32) ~ 0;
Neale Ranns20a175a2017-02-14 07:28:41 -0800511 ip4_address_t relay_addr = {
khemendra kumar34719e32017-12-08 18:06:52 +0530512 .as_u32 = 0,
Neale Ranns20a175a2017-02-14 07:28:41 -0800513 };
514
Ed Warnickecb9cada2015-12-08 15:45:58 -0700515 bi0 = from[0];
516 from += 1;
517 n_left_from -= 1;
518
519 b0 = vlib_get_buffer (vm, bi0);
520 h0 = vlib_buffer_get_current (b0);
521
khemendra kumar34719e32017-12-08 18:06:52 +0530522 /*
523 * udp_local hands us the DHCP header, need udp hdr,
Ed Warnickecb9cada2015-12-08 15:45:58 -0700524 * ip hdr to relay to client
525 */
khemendra kumar34719e32017-12-08 18:06:52 +0530526 vlib_buffer_advance (b0, -(sizeof (*u0)));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700527 u0 = vlib_buffer_get_current (b0);
528
khemendra kumar34719e32017-12-08 18:06:52 +0530529 vlib_buffer_advance (b0, -(sizeof (*ip0)));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700530 ip0 = vlib_buffer_get_current (b0);
531
532 /* Consumed by dhcp client code? */
533 if (dhcp_client_for_us (bi0, b0, ip0, u0, h0))
khemendra kumar34719e32017-12-08 18:06:52 +0530534 continue;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700535
khemendra kumar34719e32017-12-08 18:06:52 +0530536 if (1 /* dpm->insert_option_82 */ )
537 {
538 dhcp_option_t *o = (dhcp_option_t *) h0->options;
539 dhcp_option_t *sub;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700540
khemendra kumar34719e32017-12-08 18:06:52 +0530541 /* Parse through TLVs looking for option 82.
542 The circuit-ID is the FIB number we need
543 to track down the client-facing interface */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700544
khemendra kumar34719e32017-12-08 18:06:52 +0530545 while (o->option != 0xFF /* end of options */ &&
546 (u8 *) o <
547 (b0->data + b0->current_data + b0->current_length))
548 {
549 if (o->option == 82)
550 {
551 u32 vss_exist = 0;
552 u32 vss_ctrl = 0;
553 sub = (dhcp_option_t *) & o->data[0];
554 while (sub->option != 0xFF /* end of options */ &&
555 (u8 *) sub < (u8 *) (o + o->length))
556 {
557 /* If this is one of ours, it will have
558 total length 12, circuit-id suboption type,
559 and the sw_if_index */
560 if (sub->option == 1 && sub->length == 4)
561 {
562 sw_if_index = ((sub->data[0] << 24) |
563 (sub->data[1] << 16) |
564 (sub->data[2] << 8) |
565 (sub->data[3]));
566 }
567 else if (sub->option == 5 && sub->length == 4)
568 {
569 relay_addr.as_u8[0] = sub->data[0];
570 relay_addr.as_u8[1] = sub->data[1];
571 relay_addr.as_u8[2] = sub->data[2];
572 relay_addr.as_u8[3] = sub->data[3];
573 }
574 else if (sub->option == 151 &&
575 sub->length == 7 && sub->data[0] == 1)
576 vss_exist = 1;
577 else if (sub->option == 152 && sub->length == 0)
578 vss_ctrl = 1;
579 sub = (dhcp_option_t *)
580 (((uword) sub) + (sub->length + 2));
581 }
582 if (vss_ctrl && vss_exist)
583 vlib_node_increment_counter
584 (vm, dhcp_proxy_to_client_node.index,
585 DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700586
khemendra kumar34719e32017-12-08 18:06:52 +0530587 }
588 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
589 }
590 }
591
592 if (sw_if_index == (u32) ~ 0)
593 {
594 error0 = DHCP_PROXY_ERROR_NO_OPTION_82;
595
596 drop_packet:
597 vlib_node_increment_counter (vm, dhcp_proxy_to_client_node.index,
598 error0, 1);
599 f0 = vlib_get_frame_to_node (vm, dpm->error_drop_node_index);
600 to_next0 = vlib_frame_vector_args (f0);
601 to_next0[0] = bi0;
602 f0->n_vectors = 1;
603 vlib_put_frame_to_node (vm, dpm->error_drop_node_index, f0);
604 goto do_trace;
605 }
606
Neale Ranns20a175a2017-02-14 07:28:41 -0800607 if (relay_addr.as_u32 == 0)
khemendra kumar34719e32017-12-08 18:06:52 +0530608 {
609 error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ADDR;
610 goto drop_packet;
611 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700612
613 if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
khemendra kumar34719e32017-12-08 18:06:52 +0530614 {
615 error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ITF;
616 goto drop_packet;
617 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700618
khemendra kumar34719e32017-12-08 18:06:52 +0530619 fib_index = im->fib_index_by_sw_if_index[sw_if_index];
620 proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700621
Neale Ranns3466c302017-02-16 07:45:03 -0800622 if (PREDICT_FALSE (NULL == proxy))
khemendra kumar34719e32017-12-08 18:06:52 +0530623 {
624 error0 = DHCP_PROXY_ERROR_NO_SERVER;
625 goto drop_packet;
626 }
627
628 vec_foreach (server, proxy->dhcp_servers)
629 {
630 if (ip0->src_address.as_u32 == server->dhcp_server.ip4.as_u32)
631 {
632 goto server_found;
633 }
634 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700635
Neale Ranns3466c302017-02-16 07:45:03 -0800636 error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
637 goto drop_packet;
638
639 server_found:
Ed Warnickecb9cada2015-12-08 15:45:58 -0700640 vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index;
641
642 swif = vnet_get_sw_interface (vnm, sw_if_index);
643 original_sw_if_index = sw_if_index;
644 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
khemendra kumar34719e32017-12-08 18:06:52 +0530645 sw_if_index = swif->unnumbered_sw_if_index;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700646
Dave Barach203c6322016-06-26 10:29:03 -0400647 ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700648 if (ia0 == 0)
khemendra kumar34719e32017-12-08 18:06:52 +0530649 {
650 error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
651 goto drop_packet;
652 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700653
Neale Ranns20a175a2017-02-14 07:28:41 -0800654 if (relay_addr.as_u32 != ia0->as_u32)
khemendra kumar34719e32017-12-08 18:06:52 +0530655 {
656 error0 = DHCP_PROXY_ERROR_BAD_YIADDR;
657 goto drop_packet;
658 }
Neale Ranns20a175a2017-02-14 07:28:41 -0800659
Ed Warnickecb9cada2015-12-08 15:45:58 -0700660 u0->checksum = 0;
661 u0->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client);
662 sum0 = ip0->checksum;
663 old0 = ip0->dst_address.as_u32;
664 new0 = 0xFFFFFFFF;
665 ip0->dst_address.as_u32 = new0;
khemendra kumar34719e32017-12-08 18:06:52 +0530666 sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
667 dst_address /* offset of changed member */ );
Ed Warnickecb9cada2015-12-08 15:45:58 -0700668 ip0->checksum = ip_csum_fold (sum0);
669
670 sum0 = ip0->checksum;
671 old0 = ip0->src_address.as_u32;
672 new0 = ia0->as_u32;
673 ip0->src_address.as_u32 = new0;
khemendra kumar34719e32017-12-08 18:06:52 +0530674 sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
675 src_address /* offset of changed member */ );
Ed Warnickecb9cada2015-12-08 15:45:58 -0700676 ip0->checksum = ip_csum_fold (sum0);
677
khemendra kumar34719e32017-12-08 18:06:52 +0530678 vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700679 si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
680 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
khemendra kumar34719e32017-12-08 18:06:52 +0530681 vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
Ed Warnickecb9cada2015-12-08 15:45:58 -0700682
683 mac0 = vlib_buffer_get_current (b0);
684
685 hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
686 ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
Damjan Marionf1213b82016-03-13 02:22:06 +0100687 clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
Dave Barachb7b92992018-10-17 10:38:51 -0400688 clib_memset (mac0->dst_address, 0xff, sizeof (mac0->dst_address));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700689 mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
khemendra kumar34719e32017-12-08 18:06:52 +0530690 clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x0800);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700691
692 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
693 {
khemendra kumar34719e32017-12-08 18:06:52 +0530694 u32 *vlan_tag = (u32 *) (mac0 + 1);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700695 u32 tmp;
696 tmp = (si0->sub.id << 16) | 0x0800;
697 *vlan_tag = clib_host_to_net_u32 (tmp);
698 }
699
700 /* $$$ This needs to be rewritten, for sure */
701 f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
702 to_next0 = vlib_frame_vector_args (f0);
703 to_next0[0] = bi0;
704 f0->n_vectors = 1;
705 vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
706
707 do_trace:
khemendra kumar34719e32017-12-08 18:06:52 +0530708 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
709 {
710 dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
711 b0, sizeof (*tr));
712 tr->which = 1; /* to client */
713 tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0;
714 tr->error = error0;
715 tr->original_sw_if_index = original_sw_if_index;
716 tr->sw_if_index = sw_if_index;
717 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700718 }
719 return from_frame->n_vectors;
720}
721
khemendra kumar34719e32017-12-08 18:06:52 +0530722/* *INDENT-OFF* */
Neale Ranns2dd68522017-02-16 03:38:59 -0800723VLIB_REGISTER_NODE (dhcp_proxy_to_client_node, static) = {
Ed Warnickecb9cada2015-12-08 15:45:58 -0700724 .function = dhcp_proxy_to_client_input,
725 .name = "dhcp-proxy-to-client",
726 /* Takes a vector of packets. */
727 .vector_size = sizeof (u32),
728
729 .n_errors = DHCP_PROXY_N_ERROR,
730 .error_strings = dhcp_proxy_error_strings,
731 .format_buffer = format_dhcp_proxy_header_with_length,
732 .format_trace = format_dhcp_proxy_trace,
733#if 0
734 .unformat_buffer = unformat_dhcp_proxy_header,
735#endif
736};
khemendra kumar34719e32017-12-08 18:06:52 +0530737/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700738
Dave Barach8a9566e2018-10-23 10:47:36 -0400739void
740dhcp_maybe_register_udp_ports (void)
741{
742 dhcp_proxy_main_t *dm = &dhcp_proxy_main;
743 vlib_main_t *vm = dm->vlib_main;
744
745 if (dm->udp_ports_registered)
746 return;
747
748 udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client,
749 dhcp_proxy_to_client_node.index, 1 /* is_ip4 */ );
750
751 udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server,
752 dhcp_proxy_to_server_node.index, 1 /* is_ip4 */ );
753
754 dm->udp_ports_registered = 1;
755}
756
Neale Ranns2dd68522017-02-16 03:38:59 -0800757static clib_error_t *
758dhcp4_proxy_init (vlib_main_t * vm)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700759{
khemendra kumar34719e32017-12-08 18:06:52 +0530760 dhcp_proxy_main_t *dm = &dhcp_proxy_main;
761 vlib_node_t *error_drop_node;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700762
Ed Warnickecb9cada2015-12-08 15:45:58 -0700763 error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
764 dm->error_drop_node_index = error_drop_node->index;
Dave Barach8a9566e2018-10-23 10:47:36 -0400765 dm->vlib_main = vm;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700766
Ed Warnickecb9cada2015-12-08 15:45:58 -0700767 return 0;
768}
769
Ed Warnickecb9cada2015-12-08 15:45:58 -0700770
Neale Ranns2dd68522017-02-16 03:38:59 -0800771VLIB_INIT_FUNCTION (dhcp4_proxy_init);
772
773int
khemendra kumar34719e32017-12-08 18:06:52 +0530774dhcp4_proxy_set_server (ip46_address_t * addr,
775 ip46_address_t * src_addr,
776 u32 rx_table_id, u32 server_table_id, int is_del)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700777{
Ed Warnickecb9cada2015-12-08 15:45:58 -0700778 u32 rx_fib_index = 0;
Neale Ranns2dd68522017-02-16 03:38:59 -0800779 int rc = 0;
Neale Ranns20a175a2017-02-14 07:28:41 -0800780
khemendra kumar34719e32017-12-08 18:06:52 +0530781 const fib_prefix_t all_1s = {
782 .fp_len = 32,
783 .fp_addr.ip4.as_u32 = 0xffffffff,
784 .fp_proto = FIB_PROTOCOL_IP4,
Neale Rannsfca0c242017-01-13 07:57:46 -0800785 };
Ed Warnickecb9cada2015-12-08 15:45:58 -0700786
khemendra kumar34719e32017-12-08 18:06:52 +0530787 if (ip46_address_is_zero (addr))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700788 return VNET_API_ERROR_INVALID_DST_ADDRESS;
khemendra kumar34719e32017-12-08 18:06:52 +0530789
790 if (ip46_address_is_zero (src_addr))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700791 return VNET_API_ERROR_INVALID_SRC_ADDRESS;
792
Dave Barach8a9566e2018-10-23 10:47:36 -0400793 dhcp_maybe_register_udp_ports ();
794
khemendra kumar34719e32017-12-08 18:06:52 +0530795 rx_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
796 rx_table_id,
797 FIB_SOURCE_DHCP);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100798
Ed Warnickecb9cada2015-12-08 15:45:58 -0700799 if (is_del)
800 {
Neale Ranns3466c302017-02-16 07:45:03 -0800801 if (dhcp_proxy_server_del (FIB_PROTOCOL_IP4, rx_fib_index,
khemendra kumar34719e32017-12-08 18:06:52 +0530802 addr, server_table_id))
803 {
804 fib_table_entry_special_remove (rx_fib_index,
805 &all_1s, FIB_SOURCE_DHCP);
806 fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
807 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700808 }
Neale Ranns20a175a2017-02-14 07:28:41 -0800809 else
khemendra kumar34719e32017-12-08 18:06:52 +0530810 {
Neale Ranns2dd68522017-02-16 03:38:59 -0800811 if (dhcp_proxy_server_add (FIB_PROTOCOL_IP4,
khemendra kumar34719e32017-12-08 18:06:52 +0530812 addr, src_addr,
813 rx_fib_index, server_table_id))
814 {
815 fib_table_entry_special_add (rx_fib_index,
816 &all_1s,
817 FIB_SOURCE_DHCP, FIB_ENTRY_FLAG_LOCAL);
818 fib_table_lock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
819 }
820 }
Neale Ranns15002542017-09-10 04:39:11 -0700821 fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
Neale Ranns20a175a2017-02-14 07:28:41 -0800822
Neale Ranns2dd68522017-02-16 03:38:59 -0800823 return (rc);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700824}
825
Ed Warnickecb9cada2015-12-08 15:45:58 -0700826static clib_error_t *
Neale Ranns2dd68522017-02-16 03:38:59 -0800827dhcp4_proxy_set_command_fn (vlib_main_t * vm,
khemendra kumar34719e32017-12-08 18:06:52 +0530828 unformat_input_t * input,
829 vlib_cli_command_t * cmd)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700830{
Neale Ranns2dd68522017-02-16 03:38:59 -0800831 ip46_address_t server_addr, src_addr;
832 u32 server_table_id = 0, rx_table_id = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700833 int is_del = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700834 int set_src = 0, set_server = 0;
Neale Ranns2dd68522017-02-16 03:38:59 -0800835
Dave Barachb7b92992018-10-17 10:38:51 -0400836 clib_memset (&server_addr, 0, sizeof (server_addr));
837 clib_memset (&src_addr, 0, sizeof (src_addr));
Neale Ranns2dd68522017-02-16 03:38:59 -0800838
khemendra kumar34719e32017-12-08 18:06:52 +0530839 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700840 {
khemendra kumar34719e32017-12-08 18:06:52 +0530841 if (unformat (input, "server %U",
842 unformat_ip4_address, &server_addr.ip4))
843 set_server = 1;
Neale Ranns2dd68522017-02-16 03:38:59 -0800844 else if (unformat (input, "server-fib-id %d", &server_table_id))
khemendra kumar34719e32017-12-08 18:06:52 +0530845 ;
Neale Ranns2dd68522017-02-16 03:38:59 -0800846 else if (unformat (input, "rx-fib-id %d", &rx_table_id))
khemendra kumar34719e32017-12-08 18:06:52 +0530847 ;
848 else if (unformat (input, "src-address %U",
849 unformat_ip4_address, &src_addr.ip4))
850 set_src = 1;
851 else if (unformat (input, "delete") || unformat (input, "del"))
852 is_del = 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700853 else
khemendra kumar34719e32017-12-08 18:06:52 +0530854 break;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700855 }
856
857 if (is_del || (set_server && set_src))
858 {
859 int rv;
860
khemendra kumar34719e32017-12-08 18:06:52 +0530861 rv = dhcp4_proxy_set_server (&server_addr, &src_addr, rx_table_id,
862 server_table_id, is_del);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700863 switch (rv)
khemendra kumar34719e32017-12-08 18:06:52 +0530864 {
865 case 0:
866 return 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700867
khemendra kumar34719e32017-12-08 18:06:52 +0530868 case VNET_API_ERROR_INVALID_DST_ADDRESS:
869 return clib_error_return (0, "Invalid server address");
Ed Warnickecb9cada2015-12-08 15:45:58 -0700870
khemendra kumar34719e32017-12-08 18:06:52 +0530871 case VNET_API_ERROR_INVALID_SRC_ADDRESS:
872 return clib_error_return (0, "Invalid src address");
Ed Warnickecb9cada2015-12-08 15:45:58 -0700873
khemendra kumar34719e32017-12-08 18:06:52 +0530874 case VNET_API_ERROR_NO_SUCH_ENTRY:
875 return clib_error_return
876 (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
877
878 default:
879 return clib_error_return (0, "BUG: rv %d", rv);
880 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700881 }
882 else
883 return clib_error_return (0, "parse error`%U'",
khemendra kumar34719e32017-12-08 18:06:52 +0530884 format_unformat_error, input);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700885}
886
khemendra kumar34719e32017-12-08 18:06:52 +0530887/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700888VLIB_CLI_COMMAND (dhcp_proxy_set_command, static) = {
889 .path = "set dhcp proxy",
Neale Ranns20a175a2017-02-14 07:28:41 -0800890 .short_help = "set dhcp proxy [del] server <ip-addr> src-address <ip-addr> [server-fib-id <n>] [rx-fib-id <n>]",
Neale Ranns2dd68522017-02-16 03:38:59 -0800891 .function = dhcp4_proxy_set_command_fn,
Ed Warnickecb9cada2015-12-08 15:45:58 -0700892};
khemendra kumar34719e32017-12-08 18:06:52 +0530893/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700894
Neale Ranns2dd68522017-02-16 03:38:59 -0800895static u8 *
896format_dhcp4_proxy_server (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700897{
Neale Ranns3466c302017-02-16 07:45:03 -0800898 dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
khemendra kumar34719e32017-12-08 18:06:52 +0530899 ip4_fib_t *rx_fib, *server_fib;
Neale Ranns3466c302017-02-16 07:45:03 -0800900 dhcp_server_t *server;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700901
Neale Ranns3466c302017-02-16 07:45:03 -0800902 if (proxy == 0)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700903 {
khemendra kumar34719e32017-12-08 18:06:52 +0530904 s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
905 "Servers FIB,Address");
Ed Warnickecb9cada2015-12-08 15:45:58 -0700906 return s;
907 }
908
khemendra kumar34719e32017-12-08 18:06:52 +0530909 rx_fib = ip4_fib_get (proxy->rx_fib_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700910
Neale Ranns3466c302017-02-16 07:45:03 -0800911 s = format (s, "%=14u%=16U",
khemendra kumar34719e32017-12-08 18:06:52 +0530912 rx_fib->table_id,
913 format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY);
Neale Ranns3466c302017-02-16 07:45:03 -0800914
khemendra kumar34719e32017-12-08 18:06:52 +0530915 vec_foreach (server, proxy->dhcp_servers)
Neale Ranns3466c302017-02-16 07:45:03 -0800916 {
khemendra kumar34719e32017-12-08 18:06:52 +0530917 server_fib = ip4_fib_get (server->server_fib_index);
918 s = format (s, "%u,%U ",
919 server_fib->table_id,
920 format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY);
Neale Ranns3466c302017-02-16 07:45:03 -0800921 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700922 return s;
923}
924
Neale Ranns2dd68522017-02-16 03:38:59 -0800925static int
khemendra kumar34719e32017-12-08 18:06:52 +0530926dhcp4_proxy_show_walk (dhcp_proxy_t * server, void *ctx)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700927{
khemendra kumar34719e32017-12-08 18:06:52 +0530928 vlib_main_t *vm = ctx;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700929
khemendra kumar34719e32017-12-08 18:06:52 +0530930 vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, server);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700931
khemendra kumar34719e32017-12-08 18:06:52 +0530932 return (1);
Neale Ranns2dd68522017-02-16 03:38:59 -0800933}
Neale Ranns20a175a2017-02-14 07:28:41 -0800934
Neale Ranns2dd68522017-02-16 03:38:59 -0800935static clib_error_t *
936dhcp4_proxy_show_command_fn (vlib_main_t * vm,
khemendra kumar34719e32017-12-08 18:06:52 +0530937 unformat_input_t * input,
938 vlib_cli_command_t * cmd)
Neale Ranns2dd68522017-02-16 03:38:59 -0800939{
khemendra kumar34719e32017-12-08 18:06:52 +0530940 vlib_cli_output (vm, "%U", format_dhcp4_proxy_server,
941 NULL /* header line */ );
Neale Ranns20a175a2017-02-14 07:28:41 -0800942
khemendra kumar34719e32017-12-08 18:06:52 +0530943 dhcp_proxy_walk (FIB_PROTOCOL_IP4, dhcp4_proxy_show_walk, vm);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700944
Neale Ranns2dd68522017-02-16 03:38:59 -0800945 return (NULL);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700946}
947
khemendra kumar34719e32017-12-08 18:06:52 +0530948/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700949VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = {
950 .path = "show dhcp proxy",
951 .short_help = "Display dhcp proxy server info",
Neale Ranns2dd68522017-02-16 03:38:59 -0800952 .function = dhcp4_proxy_show_command_fn,
Ed Warnickecb9cada2015-12-08 15:45:58 -0700953};
khemendra kumar34719e32017-12-08 18:06:52 +0530954/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700955
Ed Warnickecb9cada2015-12-08 15:45:58 -0700956static clib_error_t *
957dhcp_option_82_vss_fn (vlib_main_t * vm,
khemendra kumar34719e32017-12-08 18:06:52 +0530958 unformat_input_t * input, vlib_cli_command_t * cmd)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700959{
John Lo70bfcaf2017-11-14 13:19:26 -0500960 u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
961 u32 oui = 0, fib_id = 0, tbl_id = ~0;
962 u8 *vpn_ascii_id = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700963
khemendra kumar34719e32017-12-08 18:06:52 +0530964 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700965 {
John Lo70bfcaf2017-11-14 13:19:26 -0500966 if (unformat (input, "table %d", &tbl_id))
khemendra kumar34719e32017-12-08 18:06:52 +0530967 ;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700968 else if (unformat (input, "oui %d", &oui))
khemendra kumar34719e32017-12-08 18:06:52 +0530969 vss_type = VSS_TYPE_VPN_ID;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700970 else if (unformat (input, "vpn-id %d", &fib_id))
khemendra kumar34719e32017-12-08 18:06:52 +0530971 vss_type = VSS_TYPE_VPN_ID;
John Lo70bfcaf2017-11-14 13:19:26 -0500972 else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
khemendra kumar34719e32017-12-08 18:06:52 +0530973 vss_type = VSS_TYPE_ASCII;
974 else if (unformat (input, "delete") || unformat (input, "del"))
975 is_del = 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700976 else
khemendra kumar34719e32017-12-08 18:06:52 +0530977 break;
John Lo70bfcaf2017-11-14 13:19:26 -0500978 }
979
Ed Warnickecb9cada2015-12-08 15:45:58 -0700980 if (tbl_id == ~0)
khemendra kumar34719e32017-12-08 18:06:52 +0530981 return clib_error_return (0, "no table ID specified.");
982
983 int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP4, tbl_id, vss_type,
John Lo70bfcaf2017-11-14 13:19:26 -0500984 vpn_ascii_id, oui, fib_id, is_del);
985 switch (rv)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700986 {
John Lo70bfcaf2017-11-14 13:19:26 -0500987 case 0:
khemendra kumar34719e32017-12-08 18:06:52 +0530988 return 0;
John Lo70bfcaf2017-11-14 13:19:26 -0500989 case VNET_API_ERROR_NO_SUCH_ENTRY:
khemendra kumar34719e32017-12-08 18:06:52 +0530990 return clib_error_return (0,
991 "option 82 vss for table %d not found in in pool.",
992 tbl_id);
John Lo70bfcaf2017-11-14 13:19:26 -0500993 default:
khemendra kumar34719e32017-12-08 18:06:52 +0530994 return clib_error_return (0, "BUG: rv %d", rv);
John Lo70bfcaf2017-11-14 13:19:26 -0500995
Ed Warnickecb9cada2015-12-08 15:45:58 -0700996 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700997}
998
khemendra kumar34719e32017-12-08 18:06:52 +0530999/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -07001000VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = {
1001 .path = "set dhcp option-82 vss",
John Lo70bfcaf2017-11-14 13:19:26 -05001002 .short_help = "set dhcp option-82 vss [del] table <table id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
Ed Warnickecb9cada2015-12-08 15:45:58 -07001003 .function = dhcp_option_82_vss_fn,
1004};
khemendra kumar34719e32017-12-08 18:06:52 +05301005/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -07001006
Ed Warnickecb9cada2015-12-08 15:45:58 -07001007static clib_error_t *
1008dhcp_vss_show_command_fn (vlib_main_t * vm,
khemendra kumar34719e32017-12-08 18:06:52 +05301009 unformat_input_t * input, vlib_cli_command_t * cmd)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001010{
khemendra kumar34719e32017-12-08 18:06:52 +05301011 dhcp_vss_walk (FIB_PROTOCOL_IP4, dhcp_vss_show_walk, vm);
Neale Ranns20a175a2017-02-14 07:28:41 -08001012
Neale Ranns2dd68522017-02-16 03:38:59 -08001013 return (NULL);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001014}
1015
khemendra kumar34719e32017-12-08 18:06:52 +05301016/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -07001017VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = {
1018 .path = "show dhcp vss",
1019 .short_help = "show dhcp VSS",
1020 .function = dhcp_vss_show_command_fn,
1021};
khemendra kumar34719e32017-12-08 18:06:52 +05301022/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -07001023
1024static clib_error_t *
1025dhcp_option_82_address_show_command_fn (vlib_main_t * vm,
khemendra kumar34719e32017-12-08 18:06:52 +05301026 unformat_input_t * input,
1027 vlib_cli_command_t * cmd)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001028{
khemendra kumar34719e32017-12-08 18:06:52 +05301029 vnet_main_t *vnm = vnet_get_main ();
1030 u32 sw_if_index0 = 0, sw_if_index;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001031 vnet_sw_interface_t *swif;
Neale Ranns2dd68522017-02-16 03:38:59 -08001032 ip4_address_t *ia0;
khemendra kumar34719e32017-12-08 18:06:52 +05301033
1034 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001035 {
khemendra kumar34719e32017-12-08 18:06:52 +05301036
1037 if (unformat (input, "%U",
1038 unformat_vnet_sw_interface, vnm, &sw_if_index0))
1039 {
1040 swif = vnet_get_sw_interface (vnm, sw_if_index0);
1041 sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1042 swif->unnumbered_sw_if_index : sw_if_index0;
1043 ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
1044 if (ia0)
1045 {
1046 vlib_cli_output (vm, "%=20s%=20s", "interface",
1047 "source IP address");
1048
1049 vlib_cli_output (vm, "%=20U%=20U",
1050 format_vnet_sw_if_index_name,
1051 vnm, sw_if_index0, format_ip4_address, ia0);
1052 }
1053 else
1054 vlib_cli_output (vm, "%=34s %=20U",
1055 "No IPv4 address configured on",
1056 format_vnet_sw_if_index_name, vnm, sw_if_index);
1057 }
Ed Warnickecb9cada2015-12-08 15:45:58 -07001058 else
khemendra kumar34719e32017-12-08 18:06:52 +05301059 break;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001060 }
khemendra kumar34719e32017-12-08 18:06:52 +05301061
Ed Warnickecb9cada2015-12-08 15:45:58 -07001062 return 0;
1063}
1064
khemendra kumar34719e32017-12-08 18:06:52 +05301065/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -07001066VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = {
1067 .path = "show dhcp option-82-address interface",
1068 .short_help = "show dhcp option-82-address interface <interface>",
1069 .function = dhcp_option_82_address_show_command_fn,
1070};
khemendra kumar34719e32017-12-08 18:06:52 +05301071/* *INDENT-ON* */
1072
1073/*
1074 * fd.io coding-style-patch-verification: ON
1075 *
1076 * Local Variables:
1077 * eval: (c-set-style "gnu")
1078 * End:
1079 */