FD.io VPP  v17.01-9-ge7dcee4
Vector Packet Processing
proxy_node.c
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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 <vnet/pg/pg.h>
20 #include <vnet/dhcp/proxy.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 "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 #define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s,
37 #undef _
40 
41 typedef struct {
42  /* 0 => to server, 1 => to client */
43  int which;
49 
50 #define VPP_DHCP_OPTION82_SUB1_SIZE 6
51 #define VPP_DHCP_OPTION82_SUB5_SIZE 6
52 #define VPP_DHCP_OPTION82_VSS_SIZE 12
53 #define VPP_DHCP_OPTION82_SIZE (VPP_DHCP_OPTION82_SUB1_SIZE + \
54  VPP_DHCP_OPTION82_SUB5_SIZE + \
55  VPP_DHCP_OPTION82_VSS_SIZE +3)
56 
59 
60 u8 * format_dhcp_proxy_trace (u8 * s, va_list * args)
61 {
62  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
63  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
64  dhcp_proxy_trace_t * t = va_arg (*args, dhcp_proxy_trace_t *);
65 
66  if (t->which == 0)
67  s = format (s, "DHCP proxy: sent to server %U\n",
69  else
70  s = format (s, "DHCP proxy: broadcast to client from %U\n",
72 
73  if (t->error != (u32)~0)
74  s = format (s, " error: %s\n", dhcp_proxy_error_strings[t->error]);
75 
76  s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
78 
79  return s;
80 }
81 
83 {
84  dhcp_header_t * h = va_arg (*args, dhcp_header_t *);
85  u32 max_header_bytes = va_arg (*args, u32);
86  u32 header_bytes;
87 
88  header_bytes = sizeof (h[0]);
89  if (max_header_bytes != 0 && header_bytes > max_header_bytes)
90  return format (s, "dhcp header truncated");
91 
92  s = format (s, "DHCP Proxy");
93 
94  return s;
95 }
96 
97 static uword
99  vlib_node_runtime_t * node,
100  vlib_frame_t * from_frame)
101 {
102  u32 n_left_from, next_index, * from, * to_next;
104  from = vlib_frame_vector_args (from_frame);
105  n_left_from = from_frame->n_vectors;
106  u32 pkts_to_server=0, pkts_to_client=0, pkts_no_server=0;
107  u32 pkts_no_interface_address=0;
108  u32 pkts_too_big=0;
109  ip4_main_t * im = &ip4_main;
110 
111  next_index = node->cached_next_index;
112 
113  while (n_left_from > 0)
114  {
115  u32 n_left_to_next;
116 
117  vlib_get_next_frame (vm, node, next_index,
118  to_next, n_left_to_next);
119 
120  while (n_left_from > 0 && n_left_to_next > 0)
121  {
122  u32 bi0;
123  vlib_buffer_t * b0;
124  udp_header_t * u0;
125  dhcp_header_t * h0;
126  ip4_header_t * ip0;
127  u32 next0;
128  u32 old0, new0;
129  ip_csum_t sum0;
130  u32 error0 = (u32) ~0;
131  u32 sw_if_index = 0;
132  u32 original_sw_if_index = 0;
133  u8 *end = NULL;
134  u32 fib_index, server_index;
135  dhcp_server_t * server;
136  u32 rx_sw_if_index;
137 
138  bi0 = from[0];
139  to_next[0] = bi0;
140  from += 1;
141  to_next += 1;
142  n_left_from -= 1;
143  n_left_to_next -= 1;
144 
145  b0 = vlib_get_buffer (vm, bi0);
146 
147  h0 = vlib_buffer_get_current (b0);
148 
149  /*
150  * udp_local hands us the DHCP header, need udp hdr,
151  * ip hdr to relay to server
152  */
153  vlib_buffer_advance (b0, -(sizeof(*u0)));
154  u0 = vlib_buffer_get_current (b0);
155 
156  /* This blows. Return traffic has src_port = 67, dst_port = 67 */
157  if (u0->src_port == clib_net_to_host_u16(UDP_DST_PORT_dhcp_to_server))
158  {
159  vlib_buffer_advance (b0, sizeof(*u0));
160  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
161  error0 = 0;
162  pkts_to_client++;
163  goto do_enqueue;
164  }
165 
166  rx_sw_if_index = vnet_buffer(b0)->sw_if_index[VLIB_RX];
167 
168  fib_index = im->fib_index_by_sw_if_index [rx_sw_if_index];
169 
170  if (fib_index < vec_len(dpm->dhcp_server_index_by_rx_fib_index))
171  server_index = dpm->dhcp_server_index_by_rx_fib_index[fib_index];
172  else
173  server_index = 0;
174 
176  server_index)))
177  {
178  no_server:
179  error0 = DHCP_PROXY_ERROR_NO_SERVER;
180  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
181  pkts_no_server++;
182  goto do_trace;
183  }
184 
185  server = pool_elt_at_index (dpm->dhcp_servers, server_index);
186  if (server->valid == 0)
187  goto no_server;
188 
189  vlib_buffer_advance (b0, -(sizeof(*ip0)));
190  ip0 = vlib_buffer_get_current (b0);
191 
192  /* disable UDP checksum */
193  u0->checksum = 0;
194  sum0 = ip0->checksum;
195  old0 = ip0->dst_address.as_u32;
196  new0 = server->dhcp_server.as_u32;
197  ip0->dst_address.as_u32 = server->dhcp_server.as_u32;
198  sum0 = ip_csum_update (sum0, old0, new0,
199  ip4_header_t /* structure */,
200  dst_address /* changed member */);
201  ip0->checksum = ip_csum_fold (sum0);
202 
203  sum0 = ip0->checksum;
204  old0 = ip0->src_address.as_u32;
205  new0 = server->dhcp_src_address.as_u32;
206  ip0->src_address.as_u32 = new0;
207  sum0 = ip_csum_update (sum0, old0, new0,
208  ip4_header_t /* structure */,
209  src_address /* changed member */);
210  ip0->checksum = ip_csum_fold (sum0);
211 
212  /* Send to DHCP server via the configured FIB */
213  vnet_buffer(b0)->sw_if_index[VLIB_TX] =
214  server->server_fib_index;
215 
217  pkts_to_server++;
218 
219  if (server->insert_option_82)
220  {
221  u32 fib_index, fib_id, opt82_fib_id=0, opt82_oui=0;
222  ip4_fib_t * fib;
223  dhcp_option_t *o = (dhcp_option_t *) h0->options;
224  u32 len = 0;
226 
227  fib_index = im->fib_index_by_sw_if_index
228  [vnet_buffer(b0)->sw_if_index[VLIB_RX]];
229  fib = ip4_fib_get (fib_index);
230  fib_id = fib->table_id;
231 
232  end = b0->data + b0->current_data + b0->current_length;
233  /* TLVs are not performance-friendly... */
234  while (o->option != 0xFF /* end of options */ && (u8 *)o < end)
235  o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
236 
238  // start write at (option*)o, some packets have padding
239  if (((u8 *)o - (u8 *)b0->data + VPP_DHCP_OPTION82_SIZE) > fl->n_data_bytes)
240  {
241  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
242  pkts_too_big++;
243  goto do_trace;
244  }
245 
246  if ((o->option == 0xFF) && ((u8 *)o <= end))
247  {
248  vnet_main_t *vnm = vnet_get_main();
249  u16 old_l0, new_l0;
250  ip4_address_t _ia0, * ia0 = &_ia0;
251  uword *p_vss;
252  vss_info *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);
261  sw_if_index = swif->unnumbered_sw_if_index;
262 
263  p_vss = hash_get (dpm->opt82vss_index_by_vrf_id,
264  fib_id);
265  if (p_vss)
266  {
267  vss = pool_elt_at_index (dpm->opt82vss, p_vss[0]);
268  opt82_oui = vss->vpn_id.oui;
269  opt82_fib_id = vss->vpn_id.fib_id;
270  }
271  /*
272  * Get the first ip4 address on the [client-side]
273  * RX interface, if not unnumbered. otherwise use
274  * the loopback interface's ip address.
275  */
276  ia0 = ip4_interface_first_address(&ip4_main, sw_if_index, 0);
277 
278  if (ia0 == 0)
279  {
280  error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
281  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
282  pkts_no_interface_address++;
283  goto do_trace;
284  }
285 
286  /* Add option 82 */
287  o->option = 82; /* option 82 */
288  o->length = 12; /* 12 octets to follow */
289  o->data[0] = 1; /* suboption 1, circuit ID (=FIB id) */
290  o->data[1] = 4; /* length of suboption */
291  o->data[2] = (original_sw_if_index >> 24) & 0xFF;
292  o->data[3] = (original_sw_if_index >> 16) & 0xFF;
293  o->data[4] = (original_sw_if_index >> 8) & 0xFF;
294  o->data[5] = (original_sw_if_index >> 0) & 0xFF;
295  o->data[6] = 5; /* suboption 5 (client RX intfc address) */
296  o->data[7] = 4; /* length 4 */
297  o->data[8] = ia0->as_u8[0];
298  o->data[9] = ia0->as_u8[1];
299  o->data[10] = ia0->as_u8[2];
300  o->data[11] = ia0->as_u8[3];
301  o->data[12] = 0xFF;
302  if (opt82_oui !=0 || opt82_fib_id != 0)
303  {
304  o->data[12] = 151; /* vss suboption */
305  if (255 == opt82_fib_id) {
306  o->data[13] = 1; /* length */
307  o->data[14] = 255; /* vss option type */
308  o->data[15] = 152; /* vss control suboption */
309  o->data[16] = 0; /* length */
310  /* and a new "end-of-options" option (0xff) */
311  o->data[17] = 0xFF;
312  o->length += 5;
313  } else {
314  o->data[13] = 8; /* length */
315  o->data[14] = 1; /* vss option type */
316  o->data[15] = (opt82_oui >> 16) & 0xff;
317  o->data[16] = (opt82_oui >> 8) & 0xff;
318  o->data[17] = (opt82_oui ) & 0xff;
319  o->data[18] = (opt82_fib_id >> 24) & 0xff;
320  o->data[19] = (opt82_fib_id >> 16) & 0xff;
321  o->data[20] = (opt82_fib_id >> 8) & 0xff;
322  o->data[21] = (opt82_fib_id) & 0xff;
323  o->data[22] = 152; /* vss control suboption */
324  o->data[23] = 0; /* length */
325 
326  /* and a new "end-of-options" option (0xff) */
327  o->data[24] = 0xFF;
328  o->length += 12;
329  }
330  }
331 
332  len = o->length + 3;
333  b0->current_length += len;
334  /* Fix IP header length and checksum */
335  old_l0 = ip0->length;
336  new_l0 = clib_net_to_host_u16 (old_l0);
337  new_l0 += len;
338  new_l0 = clib_host_to_net_u16 (new_l0);
339  ip0->length = new_l0;
340  sum0 = ip0->checksum;
341  sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
342  length /* changed member */);
343  ip0->checksum = ip_csum_fold (sum0);
344 
345  /* Fix UDP length */
346  new_l0 = clib_net_to_host_u16 (u0->length);
347  new_l0 += len;
348  u0->length = clib_host_to_net_u16 (new_l0);
349  } else {
351  (vm, dhcp_proxy_to_server_node.index,
352  DHCP_PROXY_ERROR_OPTION_82_ERROR, 1);
353  }
354  }
355 
356  next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
357 
358  do_trace:
360  {
361  dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
362  b0, sizeof (*tr));
363  tr->which = 0; /* to server */
364  tr->error = error0;
365  tr->original_sw_if_index = original_sw_if_index;
366  tr->sw_if_index = sw_if_index;
367  if (next0 == DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP)
369  }
370 
371  do_enqueue:
372  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
373  to_next, n_left_to_next,
374  bi0, next0);
375  }
376 
377  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
378  }
379 
381  DHCP_PROXY_ERROR_RELAY_TO_CLIENT,
382  pkts_to_client);
384  DHCP_PROXY_ERROR_RELAY_TO_SERVER,
385  pkts_to_server);
387  DHCP_PROXY_ERROR_NO_SERVER,
388  pkts_no_server);
390  DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS,
391  pkts_no_interface_address);
393  DHCP_PROXY_ERROR_PKT_TOO_BIG,
394  pkts_too_big);
395  return from_frame->n_vectors;
396 }
397 
399  .function = dhcp_proxy_to_server_input,
400  .name = "dhcp-proxy-to-server",
401  /* Takes a vector of packets. */
402  .vector_size = sizeof (u32),
403 
404  .n_errors = DHCP_PROXY_N_ERROR,
405  .error_strings = dhcp_proxy_error_strings,
406 
407  .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
408  .next_nodes = {
409 #define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
411 #undef _
412  },
413 
414  .format_buffer = format_dhcp_proxy_header_with_length,
415  .format_trace = format_dhcp_proxy_trace,
416 #if 0
417  .unformat_buffer = unformat_dhcp_proxy_header,
418 #endif
419 };
420 
421 static uword
423  vlib_node_runtime_t * node,
424  vlib_frame_t * from_frame)
425 {
426  u32 n_left_from, * from;
429  vnet_main_t * vnm = vnet_get_main();
430  ip4_main_t * im = &ip4_main;
431 
432  from = vlib_frame_vector_args (from_frame);
433  n_left_from = from_frame->n_vectors;
434 
435  while (n_left_from > 0)
436  {
437  u32 bi0;
438  vlib_buffer_t * b0;
439  udp_header_t * u0;
440  dhcp_header_t * h0;
441  ip4_header_t * ip0 = 0;
442  ip4_address_t * ia0 = 0;
443  u32 old0, new0;
444  ip_csum_t sum0;
446  ethernet_header_t *mac0;
447  vnet_hw_interface_t *hi0;
448  vlib_frame_t *f0;
449  u32 * to_next0;
450  u32 sw_if_index = ~0;
451  vnet_sw_interface_t *si0;
452  u32 error0 = (u32)~0;
453  vnet_sw_interface_t *swif;
454  u32 server_index;
455  u32 fib_index;
456  dhcp_server_t * server;
457  u32 original_sw_if_index = (u32) ~0;
458 
459  bi0 = from[0];
460  from += 1;
461  n_left_from -= 1;
462 
463  b0 = vlib_get_buffer (vm, bi0);
464  h0 = vlib_buffer_get_current (b0);
465 
466  /*
467  * udp_local hands us the DHCP header, need udp hdr,
468  * ip hdr to relay to client
469  */
470  vlib_buffer_advance (b0, -(sizeof(*u0)));
471  u0 = vlib_buffer_get_current (b0);
472 
473  vlib_buffer_advance (b0, -(sizeof(*ip0)));
474  ip0 = vlib_buffer_get_current (b0);
475 
476  /* Consumed by dhcp client code? */
477  if (dhcp_client_for_us (bi0, b0, ip0, u0, h0))
478  continue;
479 
480  if (1 /* dpm->insert_option_82 */)
481  {
482  dhcp_option_t *o = (dhcp_option_t *) h0->options;
484 
485  /* Parse through TLVs looking for option 82.
486  The circuit-ID is the FIB number we need
487  to track down the client-facing interface */
488 
489  while (o->option != 0xFF /* end of options */ &&
490  (u8 *) o < (b0->data + b0->current_data + b0->current_length))
491  {
492  if (o->option == 82)
493  {
494  u32 vss_exist = 0;
495  u32 vss_ctrl = 0;
496  sub = (dhcp_option_t *) &o->data[0];
497  while (sub->option != 0xFF /* end of options */ &&
498  (u8 *) sub < (u8 *)(o + o->length)) {
499  /* If this is one of ours, it will have
500  total length 12, circuit-id suboption type,
501  and the sw_if_index */
502  if (sub->option == 1 && sub->length == 4)
503  {
504  sw_if_index = (o->data[2] << 24)
505  | (o->data[3] << 16)
506  | (o->data[4] << 8)
507  | (o->data[5]);
508  } else if (sub->option == 151 &&
509  sub->length == 7 &&
510  sub->data[0] == 1)
511  vss_exist = 1;
512  else if (sub->option == 152 && sub->length == 0)
513  vss_ctrl = 1;
514  sub = (dhcp_option_t *)
515  (((uword) sub) + (sub->length + 2));
516  }
517  if (vss_ctrl && vss_exist)
519  (vm, dhcp_proxy_to_client_node.index,
520  DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1);
521 
522  }
523  o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
524  }
525  }
526 
527  if (sw_if_index == (u32)~0)
528  {
529  error0 = DHCP_PROXY_ERROR_NO_OPTION_82;
530 
531  drop_packet:
533  error0, 1);
535  to_next0 = vlib_frame_vector_args (f0);
536  to_next0[0] = bi0;
537  f0->n_vectors = 1;
539  goto do_trace;
540  }
541 
542 
543  if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
544  {
545  error0 = DHCP_PROXY_ERROR_BAD_OPTION_82;
546  goto drop_packet;
547  }
548 
549  fib_index = im->fib_index_by_sw_if_index [sw_if_index];
550 
551  if (fib_index < vec_len(dpm->dhcp_server_index_by_rx_fib_index))
552  server_index = dpm->dhcp_server_index_by_rx_fib_index[fib_index];
553  else
554  server_index = 0;
555 
557  server_index)))
558  {
559  error0 = DHCP_PROXY_ERROR_BAD_OPTION_82;
560  goto drop_packet;
561  }
562 
563  server = pool_elt_at_index (dpm->dhcp_servers, server_index);
564  if (server->valid == 0)
565  {
566  error0 = DHCP_PROXY_ERROR_NO_SERVER;
567  goto drop_packet;
568  }
569 
570  if (ip0->src_address.as_u32 != server->dhcp_server.as_u32)
571  {
572  error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
573  goto drop_packet;
574  }
575 
576  vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index;
577 
578  swif = vnet_get_sw_interface (vnm, sw_if_index);
579  original_sw_if_index = sw_if_index;
581  sw_if_index = swif->unnumbered_sw_if_index;
582 
583  ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
584  if (ia0 == 0)
585  {
586  error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
587  goto drop_packet;
588  }
589 
590  u0->checksum = 0;
591  u0->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_client);
592  sum0 = ip0->checksum;
593  old0 = ip0->dst_address.as_u32;
594  new0 = 0xFFFFFFFF;
595  ip0->dst_address.as_u32 = new0;
596  sum0 = ip_csum_update (sum0, old0, new0,
597  ip4_header_t /* structure */,
598  dst_address /* offset of changed member */);
599  ip0->checksum = ip_csum_fold (sum0);
600 
601  sum0 = ip0->checksum;
602  old0 = ip0->src_address.as_u32;
603  new0 = ia0->as_u32;
604  ip0->src_address.as_u32 = new0;
605  sum0 = ip_csum_update (sum0, old0, new0,
606  ip4_header_t /* structure */,
607  src_address /* offset of changed member */);
608  ip0->checksum = ip_csum_fold (sum0);
609 
610  vlib_buffer_advance (b0, -(sizeof(ethernet_header_t)));
611  si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
612  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
613  vlib_buffer_advance (b0, -4 /* space for VLAN tag */);
614 
615  mac0 = vlib_buffer_get_current (b0);
616 
617  hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
618  ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
619  clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
620  memset (mac0->dst_address, 0xff, sizeof (mac0->dst_address));
621  mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
622  clib_net_to_host_u16(0x8100) : clib_net_to_host_u16 (0x0800);
623 
624  if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
625  {
626  u32 * vlan_tag = (u32 *)(mac0+1);
627  u32 tmp;
628  tmp = (si0->sub.id << 16) | 0x0800;
629  *vlan_tag = clib_host_to_net_u32 (tmp);
630  }
631 
632  /* $$$ This needs to be rewritten, for sure */
634  to_next0 = vlib_frame_vector_args (f0);
635  to_next0[0] = bi0;
636  f0->n_vectors = 1;
638 
639  do_trace:
641  {
642  dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
643  b0, sizeof (*tr));
644  tr->which = 1; /* to client */
645  tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0;
646  tr->error = error0;
647  tr->original_sw_if_index = original_sw_if_index;
648  tr->sw_if_index = sw_if_index;
649  }
650  }
651  return from_frame->n_vectors;
652 }
653 
655  .function = dhcp_proxy_to_client_input,
656  .name = "dhcp-proxy-to-client",
657  /* Takes a vector of packets. */
658  .vector_size = sizeof (u32),
659 
660  .n_errors = DHCP_PROXY_N_ERROR,
661  .error_strings = dhcp_proxy_error_strings,
662  .format_buffer = format_dhcp_proxy_header_with_length,
663  .format_trace = format_dhcp_proxy_trace,
664 #if 0
665  .unformat_buffer = unformat_dhcp_proxy_header,
666 #endif
667 };
668 
670 {
672  vlib_node_t * error_drop_node;
673  dhcp_server_t * server;
674 
675  dm->vlib_main = vm;
676  dm->vnet_main = vnet_get_main();
677  error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
678  dm->error_drop_node_index = error_drop_node->index;
679 
680  dm->opt82vss_index_by_vrf_id = hash_create (0, sizeof (uword));
681 
682  udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client,
683  dhcp_proxy_to_client_node.index, 1 /* is_ip4 */);
684 
685  udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server,
686  dhcp_proxy_to_server_node.index, 1 /* is_ip4 */);
687 
688  /* Create the default server, don't mark it valid */
689  pool_get (dm->dhcp_servers, server);
690  memset (server, 0, sizeof (*server));
691 
692  return 0;
693 }
694 
696 
698  u32 rx_fib_id,
699  u32 server_fib_id,
700  int insert_option_82, int is_del)
701 {
703  dhcp_server_t * server = 0;
704  u32 server_index = 0;
705  u32 rx_fib_index = 0;
706 
707  if (addr->as_u32 == 0)
708  return VNET_API_ERROR_INVALID_DST_ADDRESS;
709 
710  if (src_address->as_u32 == 0)
711  return VNET_API_ERROR_INVALID_SRC_ADDRESS;
712 
714  rx_fib_id);
715 
716  if (rx_fib_id == 0)
717  {
718  server = pool_elt_at_index (dpm->dhcp_servers, 0);
719 
720  if (is_del)
721  {
722  memset (server, 0, sizeof (*server));
723  return 0;
724  }
725  goto initialize_it;
726  }
727 
728  if (is_del)
729  {
730  if (rx_fib_index >= vec_len(dpm->dhcp_server_index_by_rx_fib_index))
731  return VNET_API_ERROR_NO_SUCH_ENTRY;
732 
733  server_index = dpm->dhcp_server_index_by_rx_fib_index[rx_fib_index];
734  ASSERT(server_index > 0);
735 
736  /* Use the default server again. */
737  dpm->dhcp_server_index_by_rx_fib_index[rx_fib_index] = 0;
738  server = pool_elt_at_index (dpm->dhcp_servers, server_index);
739  memset (server, 0, sizeof (*server));
740  pool_put (dpm->dhcp_servers, server);
741  return 0;
742  }
743 
744  if (rx_fib_index < vec_len(dpm->dhcp_server_index_by_rx_fib_index))
745  {
746  server_index = dpm->dhcp_server_index_by_rx_fib_index[rx_fib_index];
747  if (server_index != 0)
748  {
749  server = pool_elt_at_index (dpm->dhcp_servers, server_index);
750  goto initialize_it;
751  }
752  }
753 
754  pool_get (dpm->dhcp_servers, server);
755 
756  initialize_it:
757 
758  server->dhcp_server.as_u32 = addr->as_u32;
759  server->server_fib_index =
761  server_fib_id);
762  server->dhcp_src_address.as_u32 = src_address->as_u32;
763  server->insert_option_82 = insert_option_82;
764  server->valid = 1;
765  if (rx_fib_index)
766  {
767  vec_validate (dpm->dhcp_server_index_by_rx_fib_index, rx_fib_index);
768  dpm->dhcp_server_index_by_rx_fib_index[rx_fib_index] =
769  server - dpm->dhcp_servers;
770  }
771 
772  return 0;
773 }
774 
775 /* Old API, manipulates the default server (only) */
777  u32 fib_id, int insert_option_82, int is_del)
778 {
779  return dhcp_proxy_set_server_2 (addr, src_address, 0 /* rx_fib_id */,
780  fib_id /* server_fib_id */,
781  insert_option_82, is_del);
782 }
783 
784 
785 static clib_error_t *
787  unformat_input_t * input,
788  vlib_cli_command_t * cmd)
789 {
790  ip4_address_t server_addr, src_addr;
791  u32 server_fib_id = 0, rx_fib_id = 0;
792  int is_del = 0;
793  int add_option_82 = 0;
794  int set_src = 0, set_server = 0;
795 
797  {
798  if (unformat (input, "server %U",
799  unformat_ip4_address, &server_addr))
800  set_server = 1;
801  else if (unformat (input, "server-fib-id %d", &server_fib_id))
802  ;
803  else if (unformat (input, "rx-fib-id %d", &rx_fib_id))
804  ;
805  else if (unformat(input, "src-address %U",
806  unformat_ip4_address, &src_addr))
807  set_src = 1;
808  else if (unformat (input, "add-option-82")
809  || unformat (input, "insert-option-82"))
810  add_option_82 = 1;
811  else if (unformat (input, "delete") ||
812  unformat (input, "del"))
813  is_del = 1;
814  else
815  break;
816  }
817 
818  if (is_del || (set_server && set_src))
819  {
820  int rv;
821 
822  rv = dhcp_proxy_set_server_2 (&server_addr, &src_addr, rx_fib_id,
823  server_fib_id, add_option_82, is_del);
824  switch (rv)
825  {
826  case 0:
827  return 0;
828 
829  case VNET_API_ERROR_INVALID_DST_ADDRESS:
830  return clib_error_return (0, "Invalid server address");
831 
832  case VNET_API_ERROR_INVALID_SRC_ADDRESS:
833  return clib_error_return (0, "Invalid src address");
834 
835  case VNET_API_ERROR_NO_SUCH_INNER_FIB:
836  return clib_error_return (0, "No such rx fib id %d", rx_fib_id);
837 
838  case VNET_API_ERROR_NO_SUCH_FIB:
839  return clib_error_return (0, "No such server fib id %d",
840  server_fib_id);
841 
842  case VNET_API_ERROR_NO_SUCH_ENTRY:
843  return clib_error_return
844  (0, "Fib id %d: no per-fib DHCP server configured", rx_fib_id);
845 
846  default:
847  return clib_error_return (0, "BUG: rv %d", rv);
848  }
849  }
850  else
851  return clib_error_return (0, "parse error`%U'",
852  format_unformat_error, input);
853 }
854 
855 VLIB_CLI_COMMAND (dhcp_proxy_set_command, static) = {
856  .path = "set dhcp proxy",
857  .short_help = "set dhcp proxy [del] server <ip-addr> src-address <ip-addr> [add-option-82] [server-fib-id <n>] [rx-fib-id <n>]",
858  .function = dhcp_proxy_set_command_fn,
859 };
860 
861 u8 * format_dhcp_proxy_server (u8 * s, va_list * args)
862 {
863  dhcp_proxy_main_t * dm = va_arg (*args, dhcp_proxy_main_t *);
864  dhcp_server_t * server = va_arg (*args, dhcp_server_t *);
865  u32 rx_fib_index = va_arg (*args, u32);
866  ip4_fib_t * rx_fib, * server_fib;
867  u32 server_fib_id = ~0, rx_fib_id = ~0;
868 
869  if (dm == 0)
870  {
871  s = format (s, "%=16s%=16s%=14s%=14s%=20s", "Server", "Src Address",
872  "Server FIB", "RX FIB", "Insert Option 82");
873  return s;
874  }
875 
876  server_fib = ip4_fib_get(server->server_fib_index);
877 
878  if (server_fib)
879  server_fib_id = server_fib->table_id;
880 
881  rx_fib = ip4_fib_get(rx_fib_index);
882 
883  if (rx_fib)
884  rx_fib_id = rx_fib->table_id;
885 
886  s = format (s, "%=16U%=16U%=14u%=14u%=20s",
889  server_fib_id, rx_fib_id,
890  server->insert_option_82 ? "yes" : "no");
891  return s;
892 }
893 
894 static clib_error_t *
896  unformat_input_t * input,
897  vlib_cli_command_t * cmd)
898 {
900  ip4_main_t * im = &ip4_main;
901  dhcp_server_t * server;
902  u32 server_index;
903  int i;
904 
905  vlib_cli_output (vm, "%U", format_dhcp_proxy_server, 0 /* header line */,
906  0, 0);
907 
908  for (i = 0; i < vec_len (im->fibs); i++)
909  {
911  server_index = dpm->dhcp_server_index_by_rx_fib_index[i];
912  else
913  server_index = 0;
914  server = pool_elt_at_index (dpm->dhcp_servers, server_index);
915  if (server->valid)
916  vlib_cli_output (vm, "%U", format_dhcp_proxy_server, dpm,
917  server, i);
918  }
919 
920  return 0;
921 }
922 
923 VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = {
924  .path = "show dhcp proxy",
925  .short_help = "Display dhcp proxy server info",
926  .function = dhcp_proxy_show_command_fn,
927 };
928 
929 
931  u32 oui,
932  u32 fib_id,
933  int is_del)
934 {
936  uword *p;
937  vss_info *a;
938  u32 old_oui=0, old_fib_id=0;
939 
940  p = hash_get (dm->opt82vss_index_by_vrf_id, vrf_id);
941 
942  if (p)
943  {
944  a = pool_elt_at_index (dm->opt82vss, p[0]);
945  if (!a)
946  return VNET_API_ERROR_NO_SUCH_FIB;
947  old_oui = a->vpn_id.oui;
948  old_fib_id = a->vpn_id.fib_id;
949 
950  if (is_del)
951  {
952  if (old_oui == oui &&
953  old_fib_id == fib_id)
954  {
955  pool_put(dm->opt82vss, a);
956  hash_unset (dm->opt82vss_index_by_vrf_id, vrf_id);
957  return 0;
958  }
959  else
960  return VNET_API_ERROR_NO_SUCH_ENTRY;
961  }
962  pool_put(dm->opt82vss, a);
963  hash_unset (dm->opt82vss_index_by_vrf_id, vrf_id);
964  } else if (is_del)
965  return VNET_API_ERROR_NO_SUCH_ENTRY;
966  pool_get (dm->opt82vss, a);
967  memset (a, ~0, sizeof (a[0]));
968  a->vpn_id.oui = oui;
969  a->vpn_id.fib_id = fib_id;
970  hash_set (dm->opt82vss_index_by_vrf_id, vrf_id, a - dm->opt82vss);
971 
972  return 0;
973 }
974 
975 static clib_error_t *
977  unformat_input_t * input,
978  vlib_cli_command_t * cmd)
979 {
980  int is_del = 0, got_new_vpn_id=0;
981  u32 oui=0, fib_id=0, tbl_id=~0;
982 
983 
985  {
986 
987  if (unformat(input, "delete") || unformat(input, "del"))
988  is_del = 1;
989  else if (unformat (input, "oui %d", &oui))
990  got_new_vpn_id = 1;
991  else if (unformat (input, "vpn-id %d", &fib_id))
992  got_new_vpn_id = 1;
993  else if (unformat (input, "table %d", &tbl_id))
994  got_new_vpn_id = 1;
995  else
996  break;
997  }
998  if (tbl_id == ~0)
999  return clib_error_return (0, "no table ID specified.");
1000 
1001  if (is_del || got_new_vpn_id)
1002  {
1003  int rv;
1004  rv = dhcp_proxy_set_option82_vss(tbl_id, oui, fib_id, is_del);
1005  switch (rv)
1006  {
1007  case 0:
1008  return 0;
1009 
1010  case VNET_API_ERROR_NO_SUCH_FIB:
1011  return clib_error_return (0, "option 82 vss(oui:%d, vpn-id:%d) not found in table %d",
1012  oui, fib_id, tbl_id);
1013 
1014  case VNET_API_ERROR_NO_SUCH_ENTRY:
1015  return clib_error_return (0, "option 82 vss for table %d not found in in pool.",
1016  tbl_id);
1017  default:
1018  return clib_error_return (0, "BUG: rv %d", rv);
1019  }
1020  }
1021  else
1022  return clib_error_return (0, "parse error`%U'",
1023  format_unformat_error, input);
1024 }
1025 
1026 VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = {
1027  .path = "set dhcp option-82 vss",
1028  .short_help = "set dhcp option-82 vss [del] table <table id> oui <oui> vpn-id <vpn-id>",
1029  .function = dhcp_option_82_vss_fn,
1030 };
1031 
1032 
1033 static clib_error_t *
1035  unformat_input_t * input,
1036  vlib_cli_command_t * cmd)
1037 
1038 {
1040  vss_info *v;
1041  u32 oui;
1042  u32 fib_id;
1043  u32 tbl_id;
1044  uword index;
1045 
1046  vlib_cli_output (vm, "%=9s%=11s%=12s","Table", "OUI", "VPN-ID");
1047  hash_foreach (tbl_id, index, dm->opt82vss_index_by_vrf_id,
1048  ({
1049  v = pool_elt_at_index (dm->opt82vss, index);
1050  oui = v->vpn_id.oui;
1051  fib_id = v->vpn_id.fib_id;
1052  vlib_cli_output (vm, "%=9d 0x%08x%=12d",
1053  tbl_id, oui, fib_id);
1054  }));
1055 
1056  return 0;
1057 }
1058 
1059 VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = {
1060  .path = "show dhcp vss",
1061  .short_help = "show dhcp VSS",
1062  .function = dhcp_vss_show_command_fn,
1063 };
1064 
1065 static clib_error_t *
1067  unformat_input_t * input,
1068  vlib_cli_command_t * cmd)
1069 
1070 {
1072  vnet_main_t *vnm = vnet_get_main();
1073  u32 sw_if_index0=0, sw_if_index;
1074  ip4_address_t *ia0;
1075  vnet_sw_interface_t *swif;
1076 
1077  while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
1078  {
1079 
1080  if (unformat(input, "%U",
1081  unformat_vnet_sw_interface, dm->vnet_main, &sw_if_index0))
1082  {
1083  swif = vnet_get_sw_interface (vnm, sw_if_index0);
1084  sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1085  swif->unnumbered_sw_if_index : sw_if_index0;
1086  ia0 = ip4_interface_first_address(&ip4_main, sw_if_index, 0);
1087  if (ia0)
1088  {
1089  vlib_cli_output (vm, "%=20s%=20s", "interface",
1090  "source IP address");
1091 
1092  vlib_cli_output (vm, "%=20U%=20U",
1094  dm->vnet_main, sw_if_index0,
1095  format_ip4_address, ia0);
1096  }
1097  else
1098  vlib_cli_output (vm, "%=34s %=20U",
1099  "No IPv4 address configured on",
1101  dm->vnet_main, sw_if_index);
1102  }
1103  else
1104  break;
1105  }
1106 
1107  return 0;
1108 }
1109 
1110 VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = {
1111  .path = "show dhcp option-82-address interface",
1112  .short_help = "show dhcp option-82-address interface <interface>",
1114 };
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:396
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:459
#define VNET_SW_INTERFACE_FLAG_UNNUMBERED
Definition: interface.h:535
u32 insert_option_82
Definition: proxy.h:52
#define hash_set(h, key, value)
Definition: hash.h:254
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:343
#define CLIB_UNUSED(x)
Definition: clib.h:79
uword unformat(unformat_input_t *i, char *fmt,...)
Definition: unformat.c:966
#define hash_unset(h, key)
Definition: hash.h:260
a
Definition: bitmap.h:516
ip4_address_t src_address
Definition: ip4_packet.h:163
static clib_error_t * dhcp_option_82_vss_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: proxy_node.c:976
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
ethernet_main_t * ethernet_get_main(vlib_main_t *vm)
Definition: init.c:116
static clib_error_t * dhcp_proxy_set_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: proxy_node.c:786
u32 free_list_index
Buffer free list that this buffer was allocated from and will be freed to.
Definition: buffer.h:108
vss_id vpn_id
Definition: proxy.h:46
u32 table_id
Definition: ip4.h:57
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
#define NULL
Definition: clib.h:55
u32 index
Definition: node.h:237
ip4_address_t * ip4_interface_first_address(ip4_main_t *im, u32 sw_if_index, ip_interface_address_t **result_ia)
Definition: ip4_forward.c:710
u8 src_address[6]
Definition: packet.h:54
u8 * format_dhcp_proxy_header_with_length(u8 *s, va_list *args)
Definition: proxy_node.c:82
add_epi add_epi sub
Definition: vector_sse2.h:289
u32 server_fib_index
Definition: proxy.h:53
struct _vlib_node_registration vlib_node_registration_t
uword ip_csum_t
Definition: ip_packet.h:90
static vnet_sw_interface_t * vnet_get_sw_interface(vnet_main_t *vnm, u32 sw_if_index)
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:105
unformat_function_t unformat_vnet_sw_interface
u32 error_drop_node_index
Definition: proxy.h:65
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:200
format_function_t format_ip4_address
Definition: format.h:79
format_function_t format_vnet_sw_if_index_name
clib_error_t * dhcp_proxy_init(vlib_main_t *vm)
Definition: proxy_node.c:669
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:78
static uword dhcp_proxy_to_client_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: proxy_node.c:422
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:194
ip4_address_t dst_address
Definition: ip4_packet.h:163
u8 dst_address[6]
Definition: packet.h:53
#define VPP_DHCP_OPTION82_SIZE
Definition: proxy_node.c:53
uword * opt82vss_index_by_vrf_id
Definition: proxy.h:70
#define hash_foreach(key_var, value_var, h, body)
Definition: hash.h:418
#define foreach_dhcp_proxy_to_server_input_next
Definition: proxy_node.c:29
u32 * dhcp_server_index_by_rx_fib_index
Definition: proxy.h:62
int dhcp_proxy_set_server(ip4_address_t *addr, ip4_address_t *src_address, u32 fib_id, int insert_option_82, int is_del)
Definition: proxy_node.c:776
unformat_function_t unformat_ip4_address
Definition: format.h:76
#define hash_get(h, key)
Definition: hash.h:248
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:369
vnet_sub_interface_t sub
Definition: interface.h:558
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:82
vnet_main_t * vnet_main
Definition: proxy.h:75
ip4_address_t dhcp_src_address
Definition: proxy.h:51
#define v
Definition: acl.c:314
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:214
#define PREDICT_FALSE(x)
Definition: clib.h:97
vlib_main_t * vlib_main
Definition: proxy.h:74
static uword dhcp_proxy_to_server_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: proxy_node.c:98
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:196
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:216
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:350
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:576
static clib_error_t * dhcp_option_82_address_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: proxy_node.c:1066
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1113
dhcp_server_t * dhcp_servers
Definition: proxy.h:59
u16 n_vectors
Definition: node.h:344
int dhcp_proxy_set_option82_vss(u32 vrf_id, u32 oui, u32 fib_id, int is_del)
Definition: proxy_node.c:930
u8 * format_dhcp_proxy_server(u8 *s, va_list *args)
Definition: proxy_node.c:861
static ip4_fib_t * ip4_fib_get(u32 index)
Get the FIB at the given index.
Definition: ip4_fib.h:71
Definition: ip4.h:48
u32 valid
Definition: proxy.h:54
#define clib_memcpy(a, b, c)
Definition: string.h:69
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:207
u8 options[0]
Definition: packet.h:39
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:211
Definition: proxy.h:44
u32 fib_id
Definition: proxy.h:41
static char * dhcp_proxy_error_strings[]
Definition: proxy_node.c:23
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
vlib_node_registration_t dhcp_proxy_to_server_node
(constructor) VLIB_REGISTER_NODE (dhcp_proxy_to_server_node)
Definition: proxy_node.c:57
#define hash_create(elts, value_bytes)
Definition: hash.h:658
u16 cached_next_index
Definition: node.h:463
ip4_address_t dhcp_server
Definition: proxy.h:50
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
#define vnet_buffer(b)
Definition: buffer.h:361
u8 * format_dhcp_proxy_trace(u8 *s, va_list *args)
Definition: proxy_node.c:60
ip4_address_t gateway_ip_address
Definition: packet.h:34
IPv4 main type.
Definition: ip4.h:95
u32 fib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:964
#define VLIB_BUFFER_IS_TRACED
Definition: buffer.h:95
static clib_error_t * dhcp_vss_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: proxy_node.c:1034
ip4_address_t trace_ip4_address
Definition: proxy_node.c:44
u8 data[0]
Definition: packet.h:46
u64 uword
Definition: types.h:112
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
dhcp_proxy_main_t dhcp_proxy_main
Definition: proxy.h:78
vlib_node_t * vlib_get_node_by_name(vlib_main_t *vm, u8 *name)
Definition: node.c:45
vss_info * opt82vss
Definition: proxy.h:67
Definition: defs.h:47
unsigned short u16
Definition: types.h:57
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
int dhcp_proxy_set_server_2(ip4_address_t *addr, ip4_address_t *src_address, u32 rx_fib_id, u32 server_fib_id, int insert_option_82, int is_del)
Definition: proxy_node.c:697
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:253
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:139
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
vnet_sw_interface_type_t type
Definition: interface.h:523
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1099
struct fib_table_t_ * fibs
Vector of FIBs.
Definition: ip4.h:100
u8 data[0]
Packet data.
Definition: buffer.h:158
static clib_error_t * dhcp_proxy_show_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: proxy_node.c:895
u32 oui
Definition: proxy.h:40
vhost_vring_addr_t addr
Definition: vhost-user.h:81
void udp_register_dst_port(vlib_main_t *vm, udp_dst_port_t dst_port, u32 node_index, u8 is_ip4)
Definition: udp_local.c:495
#define clib_error_return(e, args...)
Definition: error.h:111
int dhcp_client_for_us(u32 bi, vlib_buffer_t *b, ip4_header_t *ip, udp_header_t *udp, dhcp_header_t *dhcp)
Definition: client.c:65
struct _unformat_input_t unformat_input_t
static vlib_buffer_free_list_t * vlib_buffer_get_free_list(vlib_main_t *vm, u32 free_list_index)
Definition: buffer_funcs.h:317
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:187
ethernet_interface_t * interfaces
Definition: ethernet.h:243
u32 flags
buffer flags: VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:85
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
dhcp_proxy_to_server_input_next_t
Definition: proxy_node.c:34
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:145
vlib_node_registration_t dhcp_proxy_to_client_node
(constructor) VLIB_REGISTER_NODE (dhcp_proxy_to_client_node)
Definition: proxy_node.c:58
Definition: defs.h:46