2 * proxy_node.c: dhcp proxy node processing
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:
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 #include <vlib/vlib.h>
19 #include <vnet/pg/pg.h>
20 #include <vnet/dhcp/dhcp_proxy.h>
21 #include <vnet/dhcp/client.h>
22 #include <vnet/fib/ip4_fib.h>
24 static char *dhcp_proxy_error_strings[] = {
25 #define dhcp_proxy_error(n,s) s,
26 #include <vnet/dhcp/dhcp4_proxy_error.def>
27 #undef dhcp_proxy_error
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")
37 #define _(s,n) DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s,
38 foreach_dhcp_proxy_to_server_input_next
40 DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
41 } dhcp_proxy_to_server_input_next_t;
45 /* 0 => to server, 1 => to client */
47 ip4_address_t trace_ip4_address;
50 u32 original_sw_if_index;
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)
60 static vlib_node_registration_t dhcp_proxy_to_server_node;
61 static vlib_node_registration_t dhcp_proxy_to_client_node;
64 format_dhcp_proxy_trace (u8 * s, va_list * args)
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 *);
68 dhcp_proxy_trace_t *t = va_arg (*args, dhcp_proxy_trace_t *);
71 s = format (s, "DHCP proxy: sent to server %U\n",
72 format_ip4_address, &t->trace_ip4_address, t->error);
74 s = format (s, "DHCP proxy: broadcast to client from %U\n",
75 format_ip4_address, &t->trace_ip4_address);
77 if (t->error != (u32) ~ 0)
78 s = format (s, " error: %s\n", dhcp_proxy_error_strings[t->error]);
80 s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
81 t->original_sw_if_index, t->sw_if_index);
87 format_dhcp_proxy_header_with_length (u8 * s, va_list * args)
89 dhcp_header_t *h = va_arg (*args, dhcp_header_t *);
90 u32 max_header_bytes = va_arg (*args, u32);
93 header_bytes = sizeof (h[0]);
94 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
95 return format (s, "dhcp header truncated");
97 s = format (s, "DHCP Proxy");
103 dhcp_proxy_to_server_input (vlib_main_t * vm,
104 vlib_node_runtime_t * node,
105 vlib_frame_t * from_frame)
107 u32 n_left_from, next_index, *from, *to_next;
108 dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
109 from = vlib_frame_vector_args (from_frame);
110 n_left_from = from_frame->n_vectors;
111 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;
116 next_index = node->cached_next_index;
118 while (n_left_from > 0)
122 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
124 while (n_left_from > 0 && n_left_to_next > 0)
134 u32 error0 = (u32) ~ 0;
136 u32 original_sw_if_index = 0;
140 dhcp_server_t *server;
144 vlib_buffer_free_list_t *fl;
151 b0 = vlib_get_buffer (vm, bi0);
153 h0 = vlib_buffer_get_current (b0);
156 * udp_local hands us the DHCP header, need udp hdr,
157 * ip hdr to relay to server
159 vlib_buffer_advance (b0, -(sizeof (*u0)));
160 u0 = vlib_buffer_get_current (b0);
162 /* This blows. Return traffic has src_port = 67, dst_port = 67 */
164 clib_net_to_host_u16 (UDP_DST_PORT_dhcp_to_server))
166 vlib_buffer_advance (b0, sizeof (*u0));
167 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
173 rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
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);
178 if (PREDICT_FALSE (NULL == proxy))
180 error0 = DHCP_PROXY_ERROR_NO_SERVER;
181 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
186 server = &proxy->dhcp_servers[0];
187 vlib_buffer_advance (b0, -(sizeof (*ip0)));
188 ip0 = vlib_buffer_get_current (b0);
190 /* disable UDP checksum */
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);
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);
210 /* Send to DHCP server via the configured FIB */
211 vnet_buffer (b0)->sw_if_index[VLIB_TX] = server->server_fib_index;
213 h0->gateway_ip_address.as_u32 = proxy->dhcp_src_address.ip4.as_u32;
216 o = (dhcp_option_t *) h0->options;
218 fib_index = im->fib_index_by_sw_if_index
219 [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
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)
225 if (DHCP_PACKET_OPTION_MSG_TYPE == o->option)
227 if (DHCP_PACKET_DISCOVER == o->data[0])
232 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
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) >
242 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
247 if ((o->option == 0xFF) && ((u8 *) o <= end))
249 vnet_main_t *vnm = vnet_get_main ();
251 ip4_address_t _ia0, *ia0 = &_ia0;
253 vnet_sw_interface_t *swif;
255 original_sw_if_index = 0;
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;
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.
268 ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
272 error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
273 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
274 pkts_no_interface_address++;
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];
284 *o_ifid = clib_host_to_net_u32 (original_sw_if_index);
285 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];
288 *o_addr = ia0->as_u32;
291 vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4);
294 u32 id_len; /* length of VPN ID */
296 if (vss->vss_type == VSS_TYPE_VPN_ID)
298 id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
299 memcpy (&o->data[15], vss->vpn_id, id_len);
301 else if (vss->vss_type == VSS_TYPE_ASCII)
303 id_len = vec_len (vss->vpn_ascii_id);
304 memcpy (&o->data[15], vss->vpn_ascii_id, id_len);
306 else /* must be VSS_TYPE_DEFAULT, no VPN ID */
309 o->data[12] = 151; /* vss suboption */
310 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 */
316 o->length += id_len + 5;
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);
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);
333 new_l0 = clib_net_to_host_u16 (u0->length);
335 u0->length = clib_host_to_net_u16 (new_l0);
339 vlib_node_increment_counter
340 (vm, dhcp_proxy_to_server_node.index,
341 DHCP_PROXY_ERROR_OPTION_82_ERROR, 1);
344 next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
347 * If we have multiple servers configured and this is the
348 * client's discover message, then send copies to each of
351 if (is_discover && vec_len (proxy->dhcp_servers) > 1)
355 for (ii = 1; ii < vec_len (proxy->dhcp_servers); ii++)
360 c0 = vlib_buffer_copy (vm, b0);
361 ci0 = vlib_get_buffer_index (vm, c0);
362 server = &proxy->dhcp_servers[ii];
364 ip0 = vlib_buffer_get_current (c0);
366 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);
379 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
380 to_next, n_left_to_next,
383 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
385 dhcp_proxy_trace_t *tr;
387 tr = vlib_add_trace (vm, node, c0, sizeof (*tr));
388 tr->which = 0; /* to server */
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;
397 if (PREDICT_FALSE (0 == n_left_to_next))
399 vlib_put_next_frame (vm, node, next_index,
401 vlib_get_next_frame (vm, node, next_index,
402 to_next, n_left_to_next);
407 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
409 dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
411 tr->which = 0; /* to server */
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;
425 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
426 to_next, n_left_to_next,
430 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
433 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
434 DHCP_PROXY_ERROR_RELAY_TO_CLIENT,
436 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
437 DHCP_PROXY_ERROR_RELAY_TO_SERVER,
439 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
440 DHCP_PROXY_ERROR_NO_SERVER, pkts_no_server);
441 vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
442 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);
446 return from_frame->n_vectors;
450 VLIB_REGISTER_NODE (dhcp_proxy_to_server_node, static) = {
451 .function = dhcp_proxy_to_server_input,
452 .name = "dhcp-proxy-to-server",
453 /* Takes a vector of packets. */
454 .vector_size = sizeof (u32),
456 .n_errors = DHCP_PROXY_N_ERROR,
457 .error_strings = dhcp_proxy_error_strings,
459 .n_next_nodes = DHCP_PROXY_TO_SERVER_INPUT_N_NEXT,
461 #define _(s,n) [DHCP_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
462 foreach_dhcp_proxy_to_server_input_next
466 .format_buffer = format_dhcp_proxy_header_with_length,
467 .format_trace = format_dhcp_proxy_trace,
469 .unformat_buffer = unformat_dhcp_proxy_header,
475 dhcp_proxy_to_client_input (vlib_main_t * vm,
476 vlib_node_runtime_t * node,
477 vlib_frame_t * from_frame)
479 u32 n_left_from, *from;
480 ethernet_main_t *em = vnet_get_ethernet_main ();
481 dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
482 vnet_main_t *vnm = vnet_get_main ();
483 ip4_main_t *im = &ip4_main;
485 from = vlib_frame_vector_args (from_frame);
486 n_left_from = from_frame->n_vectors;
488 while (n_left_from > 0)
494 ip4_header_t *ip0 = 0;
495 ip4_address_t *ia0 = 0;
498 ethernet_interface_t *ei0;
499 ethernet_header_t *mac0;
500 vnet_hw_interface_t *hi0;
503 u32 sw_if_index = ~0;
504 vnet_sw_interface_t *si0;
505 u32 error0 = (u32) ~ 0;
506 vnet_sw_interface_t *swif;
509 dhcp_server_t *server;
510 u32 original_sw_if_index = (u32) ~ 0;
511 ip4_address_t relay_addr = {
519 b0 = vlib_get_buffer (vm, bi0);
520 h0 = vlib_buffer_get_current (b0);
523 * udp_local hands us the DHCP header, need udp hdr,
524 * ip hdr to relay to client
526 vlib_buffer_advance (b0, -(sizeof (*u0)));
527 u0 = vlib_buffer_get_current (b0);
529 vlib_buffer_advance (b0, -(sizeof (*ip0)));
530 ip0 = vlib_buffer_get_current (b0);
532 /* Consumed by dhcp client code? */
533 if (dhcp_client_for_us (bi0, b0, ip0, u0, h0))
536 if (1 /* dpm->insert_option_82 */ )
538 dhcp_option_t *o = (dhcp_option_t *) h0->options;
541 /* 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 */
545 while (o->option != 0xFF /* end of options */ &&
547 (b0->data + b0->current_data + b0->current_length))
553 sub = (dhcp_option_t *) & o->data[0];
554 while (sub->option != 0xFF /* end of options */ &&
555 (u8 *) sub < (u8 *) (o + o->length))
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)
562 sw_if_index = ((sub->data[0] << 24) |
563 (sub->data[1] << 16) |
564 (sub->data[2] << 8) |
567 else if (sub->option == 5 && sub->length == 4)
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];
574 else if (sub->option == 151 &&
575 sub->length == 7 && sub->data[0] == 1)
577 else if (sub->option == 152 && sub->length == 0)
579 sub = (dhcp_option_t *)
580 (((uword) sub) + (sub->length + 2));
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);
588 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
592 if (sw_if_index == (u32) ~ 0)
594 error0 = DHCP_PROXY_ERROR_NO_OPTION_82;
597 vlib_node_increment_counter (vm, dhcp_proxy_to_client_node.index,
599 f0 = vlib_get_frame_to_node (vm, dpm->error_drop_node_index);
600 to_next0 = vlib_frame_vector_args (f0);
603 vlib_put_frame_to_node (vm, dpm->error_drop_node_index, f0);
607 if (relay_addr.as_u32 == 0)
609 error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ADDR;
613 if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
615 error0 = DHCP_PROXY_ERROR_BAD_OPTION_82_ITF;
619 fib_index = im->fib_index_by_sw_if_index[sw_if_index];
620 proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
622 if (PREDICT_FALSE (NULL == proxy))
624 error0 = DHCP_PROXY_ERROR_NO_SERVER;
628 vec_foreach (server, proxy->dhcp_servers)
630 if (ip0->src_address.as_u32 == server->dhcp_server.ip4.as_u32)
636 error0 = DHCP_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
640 vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index;
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)
645 sw_if_index = swif->unnumbered_sw_if_index;
647 ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
650 error0 = DHCP_PROXY_ERROR_NO_INTERFACE_ADDRESS;
654 if (relay_addr.as_u32 != ia0->as_u32)
656 error0 = DHCP_PROXY_ERROR_BAD_YIADDR;
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;
665 ip0->dst_address.as_u32 = new0;
666 sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
667 dst_address /* offset of changed member */ );
668 ip0->checksum = ip_csum_fold (sum0);
670 sum0 = ip0->checksum;
671 old0 = ip0->src_address.as_u32;
673 ip0->src_address.as_u32 = new0;
674 sum0 = ip_csum_update (sum0, old0, new0, ip4_header_t /* structure */ ,
675 src_address /* offset of changed member */ );
676 ip0->checksum = ip_csum_fold (sum0);
678 vlib_buffer_advance (b0, -(sizeof (ethernet_header_t)));
679 si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
680 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
681 vlib_buffer_advance (b0, -4 /* space for VLAN tag */ );
683 mac0 = vlib_buffer_get_current (b0);
685 hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
686 ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
687 clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
688 memset (mac0->dst_address, 0xff, sizeof (mac0->dst_address));
689 mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
690 clib_net_to_host_u16 (0x8100) : clib_net_to_host_u16 (0x0800);
692 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
694 u32 *vlan_tag = (u32 *) (mac0 + 1);
696 tmp = (si0->sub.id << 16) | 0x0800;
697 *vlan_tag = clib_host_to_net_u32 (tmp);
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);
705 vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
708 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
710 dhcp_proxy_trace_t *tr = vlib_add_trace (vm, node,
712 tr->which = 1; /* to client */
713 tr->trace_ip4_address.as_u32 = ia0 ? ia0->as_u32 : 0;
715 tr->original_sw_if_index = original_sw_if_index;
716 tr->sw_if_index = sw_if_index;
719 return from_frame->n_vectors;
723 VLIB_REGISTER_NODE (dhcp_proxy_to_client_node, static) = {
724 .function = dhcp_proxy_to_client_input,
725 .name = "dhcp-proxy-to-client",
726 /* Takes a vector of packets. */
727 .vector_size = sizeof (u32),
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,
734 .unformat_buffer = unformat_dhcp_proxy_header,
739 static clib_error_t *
740 dhcp4_proxy_init (vlib_main_t * vm)
742 dhcp_proxy_main_t *dm = &dhcp_proxy_main;
743 vlib_node_t *error_drop_node;
745 error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
746 dm->error_drop_node_index = error_drop_node->index;
748 udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_client,
749 dhcp_proxy_to_client_node.index, 1 /* is_ip4 */ );
751 udp_register_dst_port (vm, UDP_DST_PORT_dhcp_to_server,
752 dhcp_proxy_to_server_node.index, 1 /* is_ip4 */ );
758 VLIB_INIT_FUNCTION (dhcp4_proxy_init);
761 dhcp4_proxy_set_server (ip46_address_t * addr,
762 ip46_address_t * src_addr,
763 u32 rx_table_id, u32 server_table_id, int is_del)
765 u32 rx_fib_index = 0;
768 const fib_prefix_t all_1s = {
770 .fp_addr.ip4.as_u32 = 0xffffffff,
771 .fp_proto = FIB_PROTOCOL_IP4,
774 if (ip46_address_is_zero (addr))
775 return VNET_API_ERROR_INVALID_DST_ADDRESS;
777 if (ip46_address_is_zero (src_addr))
778 return VNET_API_ERROR_INVALID_SRC_ADDRESS;
780 rx_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
786 if (dhcp_proxy_server_del (FIB_PROTOCOL_IP4, rx_fib_index,
787 addr, server_table_id))
789 fib_table_entry_special_remove (rx_fib_index,
790 &all_1s, FIB_SOURCE_DHCP);
791 fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
796 if (dhcp_proxy_server_add (FIB_PROTOCOL_IP4,
798 rx_fib_index, server_table_id))
800 fib_table_entry_special_add (rx_fib_index,
802 FIB_SOURCE_DHCP, FIB_ENTRY_FLAG_LOCAL);
803 fib_table_lock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
806 fib_table_unlock (rx_fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_DHCP);
811 static clib_error_t *
812 dhcp4_proxy_set_command_fn (vlib_main_t * vm,
813 unformat_input_t * input,
814 vlib_cli_command_t * cmd)
816 ip46_address_t server_addr, src_addr;
817 u32 server_table_id = 0, rx_table_id = 0;
819 int set_src = 0, set_server = 0;
821 memset (&server_addr, 0, sizeof (server_addr));
822 memset (&src_addr, 0, sizeof (src_addr));
824 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
826 if (unformat (input, "server %U",
827 unformat_ip4_address, &server_addr.ip4))
829 else if (unformat (input, "server-fib-id %d", &server_table_id))
831 else if (unformat (input, "rx-fib-id %d", &rx_table_id))
833 else if (unformat (input, "src-address %U",
834 unformat_ip4_address, &src_addr.ip4))
836 else if (unformat (input, "delete") || unformat (input, "del"))
842 if (is_del || (set_server && set_src))
846 rv = dhcp4_proxy_set_server (&server_addr, &src_addr, rx_table_id,
847 server_table_id, is_del);
853 case VNET_API_ERROR_INVALID_DST_ADDRESS:
854 return clib_error_return (0, "Invalid server address");
856 case VNET_API_ERROR_INVALID_SRC_ADDRESS:
857 return clib_error_return (0, "Invalid src address");
859 case VNET_API_ERROR_NO_SUCH_ENTRY:
860 return clib_error_return
861 (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
864 return clib_error_return (0, "BUG: rv %d", rv);
868 return clib_error_return (0, "parse error`%U'",
869 format_unformat_error, input);
873 VLIB_CLI_COMMAND (dhcp_proxy_set_command, static) = {
874 .path = "set dhcp proxy",
875 .short_help = "set dhcp proxy [del] server <ip-addr> src-address <ip-addr> [server-fib-id <n>] [rx-fib-id <n>]",
876 .function = dhcp4_proxy_set_command_fn,
881 format_dhcp4_proxy_server (u8 * s, va_list * args)
883 dhcp_proxy_t *proxy = va_arg (*args, dhcp_proxy_t *);
884 ip4_fib_t *rx_fib, *server_fib;
885 dhcp_server_t *server;
889 s = format (s, "%=14s%=16s%s", "RX FIB", "Src Address",
890 "Servers FIB,Address");
894 rx_fib = ip4_fib_get (proxy->rx_fib_index);
896 s = format (s, "%=14u%=16U",
898 format_ip46_address, &proxy->dhcp_src_address, IP46_TYPE_ANY);
900 vec_foreach (server, proxy->dhcp_servers)
902 server_fib = ip4_fib_get (server->server_fib_index);
903 s = format (s, "%u,%U ",
904 server_fib->table_id,
905 format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY);
911 dhcp4_proxy_show_walk (dhcp_proxy_t * server, void *ctx)
913 vlib_main_t *vm = ctx;
915 vlib_cli_output (vm, "%U", format_dhcp4_proxy_server, server);
920 static clib_error_t *
921 dhcp4_proxy_show_command_fn (vlib_main_t * vm,
922 unformat_input_t * input,
923 vlib_cli_command_t * cmd)
925 vlib_cli_output (vm, "%U", format_dhcp4_proxy_server,
926 NULL /* header line */ );
928 dhcp_proxy_walk (FIB_PROTOCOL_IP4, dhcp4_proxy_show_walk, vm);
934 VLIB_CLI_COMMAND (dhcp_proxy_show_command, static) = {
935 .path = "show dhcp proxy",
936 .short_help = "Display dhcp proxy server info",
937 .function = dhcp4_proxy_show_command_fn,
941 static clib_error_t *
942 dhcp_option_82_vss_fn (vlib_main_t * vm,
943 unformat_input_t * input, vlib_cli_command_t * cmd)
945 u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
946 u32 oui = 0, fib_id = 0, tbl_id = ~0;
947 u8 *vpn_ascii_id = 0;
949 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
951 if (unformat (input, "table %d", &tbl_id))
953 else if (unformat (input, "oui %d", &oui))
954 vss_type = VSS_TYPE_VPN_ID;
955 else if (unformat (input, "vpn-id %d", &fib_id))
956 vss_type = VSS_TYPE_VPN_ID;
957 else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
958 vss_type = VSS_TYPE_ASCII;
959 else if (unformat (input, "delete") || unformat (input, "del"))
966 return clib_error_return (0, "no table ID specified.");
968 int rv = dhcp_proxy_set_vss (FIB_PROTOCOL_IP4, tbl_id, vss_type,
969 vpn_ascii_id, oui, fib_id, is_del);
974 case VNET_API_ERROR_NO_SUCH_ENTRY:
975 return clib_error_return (0,
976 "option 82 vss for table %d not found in in pool.",
979 return clib_error_return (0, "BUG: rv %d", rv);
985 VLIB_CLI_COMMAND (dhcp_proxy_vss_command,static) = {
986 .path = "set dhcp option-82 vss",
987 .short_help = "set dhcp option-82 vss [del] table <table id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
988 .function = dhcp_option_82_vss_fn,
992 static clib_error_t *
993 dhcp_vss_show_command_fn (vlib_main_t * vm,
994 unformat_input_t * input, vlib_cli_command_t * cmd)
996 dhcp_vss_walk (FIB_PROTOCOL_IP4, dhcp_vss_show_walk, vm);
1002 VLIB_CLI_COMMAND (dhcp_proxy_vss_show_command, static) = {
1003 .path = "show dhcp vss",
1004 .short_help = "show dhcp VSS",
1005 .function = dhcp_vss_show_command_fn,
1009 static clib_error_t *
1010 dhcp_option_82_address_show_command_fn (vlib_main_t * vm,
1011 unformat_input_t * input,
1012 vlib_cli_command_t * cmd)
1014 vnet_main_t *vnm = vnet_get_main ();
1015 u32 sw_if_index0 = 0, sw_if_index;
1016 vnet_sw_interface_t *swif;
1019 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1022 if (unformat (input, "%U",
1023 unformat_vnet_sw_interface, vnm, &sw_if_index0))
1025 swif = vnet_get_sw_interface (vnm, sw_if_index0);
1026 sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1027 swif->unnumbered_sw_if_index : sw_if_index0;
1028 ia0 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
1031 vlib_cli_output (vm, "%=20s%=20s", "interface",
1032 "source IP address");
1034 vlib_cli_output (vm, "%=20U%=20U",
1035 format_vnet_sw_if_index_name,
1036 vnm, sw_if_index0, format_ip4_address, ia0);
1039 vlib_cli_output (vm, "%=34s %=20U",
1040 "No IPv4 address configured on",
1041 format_vnet_sw_if_index_name, vnm, sw_if_index);
1051 VLIB_CLI_COMMAND (dhcp_proxy_address_show_command,static) = {
1052 .path = "show dhcp option-82-address interface",
1053 .short_help = "show dhcp option-82-address interface <interface>",
1054 .function = dhcp_option_82_address_show_command_fn,
1059 * fd.io coding-style-patch-verification: ON
1062 * eval: (c-set-style "gnu")