2 * dhcp6_proxy_node.c: dhcpv6 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/dhcp6_packet.h>
22 #include <vnet/fib/ip6_fib.h>
23 #include <vnet/mfib/mfib_table.h>
24 #include <vnet/mfib/ip6_mfib.h>
26 static char * dhcpv6_proxy_error_strings[] = {
27 #define dhcpv6_proxy_error(n,s) s,
28 #include <vnet/dhcp/dhcp6_proxy_error.def>
29 #undef dhcpv6_proxy_error
32 #define foreach_dhcpv6_proxy_to_server_input_next \
33 _ (DROP, "error-drop") \
34 _ (LOOKUP, "ip6-lookup") \
35 _ (SEND_TO_CLIENT, "dhcpv6-proxy-to-client")
39 #define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
40 foreach_dhcpv6_proxy_to_server_input_next
42 DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
43 } dhcpv6_proxy_to_server_input_next_t;
46 /* 0 => to server, 1 => to client */
51 u32 original_sw_if_index;
52 } dhcpv6_proxy_trace_t;
54 static vlib_node_registration_t dhcpv6_proxy_to_server_node;
55 static vlib_node_registration_t dhcpv6_proxy_to_client_node;
57 /* all DHCP servers address */
58 static ip6_address_t all_dhcpv6_server_address;
59 static ip6_address_t all_dhcpv6_server_relay_agent_address;
62 format_dhcpv6_proxy_trace (u8 * s, va_list * args)
64 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
65 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
66 dhcpv6_proxy_trace_t * t = va_arg (*args, dhcpv6_proxy_trace_t *);
69 s = format (s, "DHCPV6 proxy: sent to server %U",
70 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
72 s = format (s, "DHCPV6 proxy: sent to client from %U",
73 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
74 if (t->error != (u32)~0)
75 s = format (s, " error: %s\n", dhcpv6_proxy_error_strings[t->error]);
77 s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
78 t->original_sw_if_index, t->sw_if_index);
84 format_dhcpv6_proxy_header_with_length (u8 * s, va_list * args)
86 dhcpv6_header_t * h = va_arg (*args, dhcpv6_header_t *);
87 u32 max_header_bytes = va_arg (*args, u32);
90 header_bytes = sizeof (h[0]);
91 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
92 return format (s, "dhcpv6 header truncated");
94 s = format (s, "DHCPV6 Proxy");
98 /* get first interface address */
99 static ip6_address_t *
100 ip6_interface_first_global_or_site_address (ip6_main_t * im, u32 sw_if_index)
102 ip_lookup_main_t * lm = &im->lookup_main;
103 ip_interface_address_t * ia = 0;
104 ip6_address_t * result = 0;
106 foreach_ip_interface_address (lm, ia, sw_if_index,
107 1 /* honor unnumbered */,
109 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
110 if ((a->as_u8[0] & 0xe0) == 0x20 ||
111 (a->as_u8[0] & 0xfe) == 0xfc) {
119 static inline void copy_ip6_address (ip6_address_t *dst,
122 dst->as_u64[0] = src->as_u64[0];
123 dst->as_u64[1] = src->as_u64[1];
127 dhcpv6_proxy_to_server_input (vlib_main_t * vm,
128 vlib_node_runtime_t * node,
129 vlib_frame_t * from_frame)
131 u32 n_left_from, next_index, * from, * to_next;
132 dhcp_proxy_main_t * dpm = &dhcp_proxy_main;
133 from = vlib_frame_vector_args (from_frame);
134 n_left_from = from_frame->n_vectors;
135 u32 pkts_to_server=0, pkts_to_client=0, pkts_no_server=0;
136 u32 pkts_no_interface_address=0, pkts_no_exceeding_max_hop=0;
137 u32 pkts_no_src_address=0;
138 u32 pkts_wrong_msg_type=0;
140 ip6_main_t * im = &ip6_main;
143 dhcp_server_t * server;
144 u32 rx_fib_idx = 0, server_fib_idx = 0;
146 next_index = node->cached_next_index;
148 while (n_left_from > 0)
152 vlib_get_next_frame (vm, node, next_index,
153 to_next, n_left_to_next);
155 while (n_left_from > 0 && n_left_to_next > 0)
157 vnet_main_t *vnm = vnet_get_main();
159 u32 rx_sw_if_index = 0;
160 vnet_sw_interface_t *swif;
163 udp_header_t * u0, *u1;
164 dhcpv6_header_t * h0; // client msg hdr
165 ip6_header_t * ip0, *ip1;
166 ip6_address_t _ia0, *ia0=&_ia0;
168 u32 error0 = (u32) ~0;
169 dhcpv6_option_t *fwd_opt;
170 dhcpv6_relay_hdr_t *r1;
172 dhcpv6_int_id_t *id1;
174 dhcpv6_client_mac_t *cmac; // client mac
175 ethernet_header_t * e_h0;
176 u8 client_src_mac[6];
177 vlib_buffer_free_list_t *fl;
187 b0 = vlib_get_buffer (vm, bi0);
189 h0 = vlib_buffer_get_current (b0);
192 * udp_local hands us the DHCPV6 header.
194 u0 = (void *)h0 -(sizeof(*u0));
195 ip0 = (void *)u0 -(sizeof(*ip0));
196 e_h0 = (void *)ip0 - ethernet_buffer_header_size(b0);
198 clib_memcpy(client_src_mac, e_h0->src_address, 6);
200 switch (h0->u.msg_type) {
201 case DHCPV6_MSG_SOLICIT:
202 case DHCPV6_MSG_REQUEST:
203 case DHCPV6_MSG_CONFIRM:
204 case DHCPV6_MSG_RENEW:
205 case DHCPV6_MSG_REBIND:
206 case DHCPV6_MSG_RELEASE:
207 case DHCPV6_MSG_DECLINE:
208 case DHCPV6_MSG_INFORMATION_REQUEST:
209 case DHCPV6_MSG_RELAY_FORW:
212 case DHCPV6_MSG_RELAY_REPL:
214 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
219 /* drop the packet */
220 pkts_wrong_msg_type++;
221 error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
222 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
227 /* Send to DHCPV6 server via the configured FIB */
228 rx_sw_if_index = sw_if_index = vnet_buffer(b0)->sw_if_index[VLIB_RX];
229 rx_fib_idx = im->mfib_index_by_sw_if_index [rx_sw_if_index];
230 server = dhcp_get_server(dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
232 if (PREDICT_FALSE (NULL == server))
234 error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
235 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
240 server_fib_idx = server->server_fib_index;
241 vnet_buffer(b0)->sw_if_index[VLIB_TX] = server_fib_idx;
244 /* relay-option header pointer */
245 vlib_buffer_advance(b0, -(sizeof(*fwd_opt)));
246 fwd_opt = vlib_buffer_get_current(b0);
247 /* relay message header pointer */
248 vlib_buffer_advance(b0, -(sizeof(*r1)));
249 r1 = vlib_buffer_get_current(b0);
251 vlib_buffer_advance(b0, -(sizeof(*u1)));
252 u1 = vlib_buffer_get_current(b0);
254 vlib_buffer_advance(b0, -(sizeof(*ip1)));
255 ip1 = vlib_buffer_get_current(b0);
257 /* fill in all that rubbish... */
258 len = clib_net_to_host_u16(u0->length) - sizeof(udp_header_t);
259 copy_ip6_address(&r1->peer_addr, &ip0->src_address);
261 r1->msg_type = DHCPV6_MSG_RELAY_FORW;
262 fwd_opt->length = clib_host_to_net_u16(len);
263 fwd_opt->option = clib_host_to_net_u16(DHCPV6_OPTION_RELAY_MSG);
266 r1->hop_count = (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
268 if (PREDICT_FALSE(r1->hop_count >= HOP_COUNT_LIMIT))
270 error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
271 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
272 pkts_no_exceeding_max_hop++;
277 /* If relay-fwd and src address is site or global unicast address */
278 if (h0->u.msg_type == DHCPV6_MSG_RELAY_FORW &&
279 ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
280 (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
282 /* Set link address to zero */
283 r1->link_addr.as_u64[0] = 0;
284 r1->link_addr.as_u64[1] = 0;
285 goto link_address_set;
288 /* if receiving interface is unnumbered, use receiving interface
289 * IP address as link address, otherwise use the loopback interface
290 * IP address as link address.
293 swif = vnet_get_sw_interface (vnm, rx_sw_if_index);
294 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
295 sw_if_index = swif->unnumbered_sw_if_index;
297 ia0 = ip6_interface_first_global_or_site_address(&ip6_main, sw_if_index);
300 error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
301 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
302 pkts_no_interface_address++;
306 copy_ip6_address(&r1->link_addr, ia0);
309 fl = vlib_buffer_get_free_list (vm, b0->free_list_index);
311 if ((b0->current_length+sizeof(*id1)+sizeof(*vss1)+sizeof(*cmac))
314 error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
315 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
320 id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
321 b0->current_length += (sizeof (*id1));
323 id1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_INTERFACE_ID);
324 id1->opt.length = clib_host_to_net_u16(sizeof(rx_sw_if_index));
325 id1->int_idx = clib_host_to_net_u32(rx_sw_if_index);
328 if (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW)
330 cmac = (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
331 b0->current_length += (sizeof (*cmac));
332 cmac->opt.length =clib_host_to_net_u16(sizeof(*cmac) -
334 cmac->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
335 cmac->link_type = clib_host_to_net_u16(1); // ethernet
336 clib_memcpy(cmac->data, client_src_mac, 6);
337 u1->length += sizeof(*cmac);
340 vss = dhcp_get_vss_info(dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
343 vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
344 b0->current_length += (sizeof (*vss1));
345 vss1->opt.length =clib_host_to_net_u16(sizeof(*vss1) -
347 vss1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_VSS);
348 vss1->data[0] = 1; // type
349 vss1->data[1] = vss->oui >>16 & 0xff;
350 vss1->data[2] = vss->oui >>8 & 0xff;
351 vss1->data[3] = vss->oui & 0xff;
352 vss1->data[4] = vss->fib_id >> 24 & 0xff;
353 vss1->data[5] = vss->fib_id >> 16 & 0xff;
354 vss1->data[6] = vss->fib_id >> 8 & 0xff;
355 vss1->data[7] = vss->fib_id & 0xff;
356 u1->length += sizeof(*vss1);
361 u1->src_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_client);
362 u1->dst_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_server);
365 clib_host_to_net_u16( clib_net_to_host_u16(fwd_opt->length) +
366 sizeof(*r1) + sizeof(*fwd_opt) +
367 sizeof(*u1) + sizeof(*id1) + u1->length);
369 memset(ip1, 0, sizeof(*ip1));
370 ip1->ip_version_traffic_class_and_flow_label = 0x60;
371 ip1->payload_length = u1->length;
372 ip1->protocol = PROTO_UDP;
373 ip1->hop_limit = HOP_COUNT_LIMIT;
374 src = (server->dhcp_server.ip6.as_u64[0] ||
375 server->dhcp_server.ip6.as_u64[1]) ?
376 &server->dhcp_server.ip6 : &all_dhcpv6_server_address;
377 copy_ip6_address(&ip1->dst_address, src);
380 ia0 = ip6_interface_first_global_or_site_address
381 (&ip6_main, vnet_buffer(b0)->sw_if_index[VLIB_RX]);
383 src = (server->dhcp_src_address.ip6.as_u64[0] ||
384 server->dhcp_src_address.ip6.as_u64[1]) ?
385 &server->dhcp_src_address.ip6 : ia0;
388 error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
389 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
390 pkts_no_src_address++;
394 copy_ip6_address (&ip1->src_address, src);
397 u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
399 ASSERT(bogus_length == 0);
401 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
404 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
406 dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
408 tr->which = 0; /* to server */
410 tr->original_sw_if_index = rx_sw_if_index;
411 tr->sw_if_index = sw_if_index;
412 if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
413 copy_ip6_address((ip6_address_t *)&tr->packet_data[0], &server->dhcp_server.ip6);
417 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
418 to_next, n_left_to_next,
422 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
425 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
426 DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
428 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
429 DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
431 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
432 DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
433 pkts_no_interface_address);
434 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
435 DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
436 pkts_wrong_msg_type);
437 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
438 DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
439 pkts_no_src_address);
440 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
441 DHCPV6_PROXY_ERROR_PKT_TOO_BIG,
443 return from_frame->n_vectors;
446 VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node, static) = {
447 .function = dhcpv6_proxy_to_server_input,
448 .name = "dhcpv6-proxy-to-server",
449 /* Takes a vector of packets. */
450 .vector_size = sizeof (u32),
452 .n_errors = DHCPV6_PROXY_N_ERROR,
453 .error_strings = dhcpv6_proxy_error_strings,
455 .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
457 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
458 foreach_dhcpv6_proxy_to_server_input_next
462 .format_buffer = format_dhcpv6_proxy_header_with_length,
463 .format_trace = format_dhcpv6_proxy_trace,
465 .unformat_buffer = unformat_dhcpv6_proxy_header,
470 dhcpv6_proxy_to_client_input (vlib_main_t * vm,
471 vlib_node_runtime_t * node,
472 vlib_frame_t * from_frame)
475 u32 n_left_from, * from;
476 ethernet_main_t *em = ethernet_get_main (vm);
477 dhcp_proxy_main_t * dm = &dhcp_proxy_main;
478 dhcp_server_t * server;
479 vnet_main_t * vnm = vnet_get_main();
482 from = vlib_frame_vector_args (from_frame);
483 n_left_from = from_frame->n_vectors;
485 while (n_left_from > 0)
489 udp_header_t * u0, *u1=0;
490 dhcpv6_relay_hdr_t * h0;
491 ip6_header_t * ip1 = 0, *ip0;
492 ip6_address_t _ia0, * ia0 = &_ia0;
493 ip6_address_t client_address;
494 ethernet_interface_t *ei0;
495 ethernet_header_t *mac0;
496 vnet_hw_interface_t *hi0;
499 u32 sw_if_index = ~0;
500 u32 original_sw_if_index = ~0;
501 vnet_sw_interface_t *si0;
502 u32 error0 = (u32)~0;
503 vnet_sw_interface_t *swif;
504 dhcpv6_option_t *r0 = 0, *o;
506 u8 interface_opt_flag = 0;
507 u8 relay_msg_opt_flag = 0;
508 ip6_main_t * im = &ip6_main;
509 u32 server_fib_idx, client_fib_idx;
515 b0 = vlib_get_buffer (vm, bi0);
516 h0 = vlib_buffer_get_current (b0);
518 if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
520 error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
523 vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
526 f0 = vlib_get_frame_to_node (vm, dm->error_drop_node_index);
527 to_next0 = vlib_frame_vector_args (f0);
530 vlib_put_frame_to_node (vm, dm->error_drop_node_index, f0);
533 /* hop count seems not need to be checked */
534 if (HOP_COUNT_LIMIT < h0->hop_count)
536 error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
539 u0 = (void *)h0 -(sizeof(*u0));
540 ip0 = (void *)u0 -(sizeof(*ip0));
542 vlib_buffer_advance (b0, sizeof(*h0));
543 o = vlib_buffer_get_current (b0);
545 /* Parse through TLVs looking for option 18 (DHCPV6_OPTION_INTERFACE_ID)
546 _and_ option 9 (DHCPV6_OPTION_RELAY_MSG) option which must be there.
547 Currently assuming no other options need to be processed
548 The interface-ID is the FIB number we need
549 to track down the client-facing interface */
551 while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
553 if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16(o->option))
555 interface_opt_flag = 1;
556 if (clib_net_to_host_u16(o->length) == sizeof(sw_if_index))
557 sw_if_index = clib_net_to_host_u32(((dhcpv6_int_id_t*)o)->int_idx);
558 if (sw_if_index >= vec_len (im->fib_index_by_sw_if_index))
560 error0 = DHCPV6_PROXY_ERROR_WRONG_INTERFACE_ID_OPTION;
564 if (DHCPV6_OPTION_RELAY_MSG == clib_net_to_host_u16(o->option))
566 relay_msg_opt_flag = 1;
567 r0 = vlib_buffer_get_current (b0);
569 if ((relay_msg_opt_flag == 1) && (interface_opt_flag == 1))
571 vlib_buffer_advance (b0, sizeof(*o) + clib_net_to_host_u16(o->length));
572 o = (dhcpv6_option_t *) (((uword) o) + clib_net_to_host_u16(o->length) + sizeof(*o));
575 if ((relay_msg_opt_flag == 0) || (r0 == 0))
577 error0 = DHCPV6_PROXY_ERROR_NO_RELAY_MESSAGE_OPTION;
581 if ((u32)~0 == sw_if_index)
583 error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
587 //Advance buffer to start of encapsulated DHCPv6 message
588 vlib_buffer_advance (b0, sizeof(*r0));
590 client_fib_idx = im->mfib_index_by_sw_if_index[sw_if_index];
591 server = dhcp_get_server(dm, client_fib_idx, FIB_PROTOCOL_IP6);
595 error0 = DHCPV6_PROXY_ERROR_NO_SERVER;
599 server_fib_idx = im->fib_index_by_sw_if_index
600 [vnet_buffer(b0)->sw_if_index[VLIB_RX]];
602 if (server_fib_idx != server->server_fib_index ||
603 ip0->src_address.as_u64[0] != server->dhcp_server.ip6.as_u64[0] ||
604 ip0->src_address.as_u64[1] != server->dhcp_server.ip6.as_u64[1])
606 //drop packet if not from server with configured address or FIB
607 error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
611 vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
614 swif = vnet_get_sw_interface (vnm, original_sw_if_index);
615 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
616 sw_if_index = swif->unnumbered_sw_if_index;
620 * udp_local hands us the DHCPV6 header, need udp hdr,
621 * ip hdr to relay to client
623 vlib_buffer_advance (b0, -(sizeof(*u1)));
624 u1 = vlib_buffer_get_current (b0);
626 vlib_buffer_advance (b0, -(sizeof(*ip1)));
627 ip1 = vlib_buffer_get_current (b0);
629 copy_ip6_address(&client_address, &h0->peer_addr);
631 ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
634 error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
638 len = clib_net_to_host_u16(r0->length);
639 memset(ip1, 0, sizeof(*ip1));
640 copy_ip6_address(&ip1->dst_address, &client_address);
642 u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
643 u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
644 u1->length = clib_host_to_net_u16 (len + sizeof(udp_header_t));
646 ip1->ip_version_traffic_class_and_flow_label =
647 ip0->ip_version_traffic_class_and_flow_label &
649 ip1->payload_length = u1->length;
650 ip1->protocol = PROTO_UDP;
651 ip1->hop_limit = HOP_COUNT_LIMIT;
652 copy_ip6_address(&ip1->src_address, ia0);
654 u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
656 ASSERT(bogus_length == 0);
658 vlib_buffer_advance (b0, -(sizeof(ethernet_header_t)));
659 si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
660 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
661 vlib_buffer_advance (b0, -4 /* space for VLAN tag */);
663 mac0 = vlib_buffer_get_current (b0);
665 hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
666 ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
667 clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
668 memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
669 mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
670 clib_net_to_host_u16(0x8100) : clib_net_to_host_u16 (0x86dd);
672 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
674 u32 * vlan_tag = (u32 *)(mac0+1);
676 tmp = (si0->sub.id << 16) | 0x0800;
677 *vlan_tag = clib_host_to_net_u32 (tmp);
680 /* $$$ consider adding a dynamic next to the graph node, for performance */
681 f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
682 to_next0 = vlib_frame_vector_args (f0);
685 vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
688 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
690 dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
692 tr->which = 1; /* to client */
694 copy_ip6_address((ip6_address_t*)tr->packet_data, ia0);
696 tr->original_sw_if_index = original_sw_if_index;
697 tr->sw_if_index = sw_if_index;
700 return from_frame->n_vectors;
704 VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node, static) = {
705 .function = dhcpv6_proxy_to_client_input,
706 .name = "dhcpv6-proxy-to-client",
707 /* Takes a vector of packets. */
708 .vector_size = sizeof (u32),
710 .n_errors = DHCPV6_PROXY_N_ERROR,
711 .error_strings = dhcpv6_proxy_error_strings,
712 .format_buffer = format_dhcpv6_proxy_header_with_length,
713 .format_trace = format_dhcpv6_proxy_trace,
715 .unformat_buffer = unformat_dhcpv6_proxy_header,
719 static clib_error_t *
720 dhcp6_proxy_init (vlib_main_t * vm)
722 dhcp_proxy_main_t * dm = &dhcp_proxy_main;
723 vlib_node_t * error_drop_node;
725 error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
726 dm->error_drop_node_index = error_drop_node->index;
728 /* RFC says this is the dhcpv6 server address */
729 all_dhcpv6_server_address.as_u64[0] = clib_host_to_net_u64 (0xFF05000000000000);
730 all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
732 /* RFC says this is the server and agent address */
733 all_dhcpv6_server_relay_agent_address.as_u64[0] = clib_host_to_net_u64 (0xFF02000000000000);
734 all_dhcpv6_server_relay_agent_address.as_u64[1] = clib_host_to_net_u64 (0x00010002);
736 udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
737 dhcpv6_proxy_to_client_node.index, 0 /* is_ip6 */);
739 udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
740 dhcpv6_proxy_to_server_node.index, 0 /* is_ip6 */);
745 VLIB_INIT_FUNCTION (dhcp6_proxy_init);
748 dhcp6_proxy_set_server (ip46_address_t *addr,
749 ip46_address_t *src_addr,
754 u32 rx_fib_index = 0;
757 const mfib_prefix_t all_dhcp_servers = {
759 .fp_proto = FIB_PROTOCOL_IP6,
761 .ip6 = all_dhcpv6_server_relay_agent_address,
765 if (ip46_address_is_zero(addr))
766 return VNET_API_ERROR_INVALID_DST_ADDRESS;
768 if (ip46_address_is_zero(src_addr))
769 return VNET_API_ERROR_INVALID_SRC_ADDRESS;
771 rx_fib_index = mfib_table_find_or_create_and_lock(FIB_PROTOCOL_IP6,
776 rc = dhcp_proxy_server_del (FIB_PROTOCOL_IP6, rx_fib_index);
780 mfib_table_entry_delete(rx_fib_index,
783 mfib_table_unlock(rx_fib_index, FIB_PROTOCOL_IP6);
788 const fib_route_path_t path_for_us = {
789 .frp_proto = FIB_PROTOCOL_IP6,
790 .frp_addr = zero_addr,
791 .frp_sw_if_index = 0xffffffff,
794 .frp_flags = FIB_ROUTE_PATH_LOCAL,
796 if (dhcp_proxy_server_add (FIB_PROTOCOL_IP6, addr, src_addr,
797 rx_fib_index, server_table_id))
799 mfib_table_entry_path_update(rx_fib_index,
803 MFIB_ITF_FLAG_FORWARD);
805 * Each interface that is enabled in this table, needs to be added
806 * as an accepting interface, but this is not easily doable in VPP.
807 * So we cheat. Add a flag to the entry that indicates accept form
809 * We will still only accept on v6 enabled interfaces, since the
810 * input feature ensures this.
812 mfib_table_entry_update(rx_fib_index,
815 MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
816 mfib_table_lock(rx_fib_index, FIB_PROTOCOL_IP6);
820 mfib_table_unlock(rx_fib_index, FIB_PROTOCOL_IP6);
825 static clib_error_t *
826 dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
827 unformat_input_t * input,
828 vlib_cli_command_t * cmd)
830 ip46_address_t addr, src_addr;
831 int set_server = 0, set_src_address = 0;
832 u32 rx_table_id = 0, server_table_id = 0;
835 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
837 if (unformat (input, "server %U",
838 unformat_ip6_address, &addr.ip6))
840 else if (unformat(input, "src-address %U",
841 unformat_ip6_address, &src_addr.ip6))
843 else if (unformat (input, "server-fib-id %d", &server_table_id))
845 else if (unformat (input, "rx-fib-id %d", &rx_table_id))
847 else if (unformat (input, "delete") ||
848 unformat (input, "del"))
854 if (is_del || (set_server && set_src_address))
858 rv = dhcp6_proxy_set_server (&addr, &src_addr, rx_table_id,
859 server_table_id, is_del);
861 //TODO: Complete the errors
867 case VNET_API_ERROR_INVALID_DST_ADDRESS:
868 return clib_error_return (0, "Invalid server address");
870 case VNET_API_ERROR_INVALID_SRC_ADDRESS:
871 return clib_error_return (0, "Invalid src address");
873 case VNET_API_ERROR_NO_SUCH_ENTRY:
874 return clib_error_return
875 (0, "Fib id %d: no per-fib DHCP server configured", rx_table_id);
878 return clib_error_return (0, "BUG: rv %d", rv);
882 return clib_error_return (0, "parse error`%U'",
883 format_unformat_error, input);
886 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
887 .path = "set dhcpv6 proxy",
888 .short_help = "set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> "
889 "[server-fib-id <fib-id>] [rx-fib-id <fib-id>] ",
890 .function = dhcpv6_proxy_set_command_fn,
894 format_dhcp6_proxy_server (u8 * s, va_list * args)
896 dhcp_server_t * server = va_arg (*args, dhcp_server_t *);
897 ip6_fib_t *server_fib;
902 s = format (s, "%=40s%=40s%=14s%=14s", "Server Address", "Source Address",
903 "Server FIB", "RX FIB");
907 server_fib = ip6_fib_get(server->server_fib_index);
908 rx_fib = ip6_mfib_get(server->rx_fib_index);
911 s = format (s, "%=40U%=40U%=14u%=14u",
912 format_ip46_address, &server->dhcp_server, IP46_TYPE_ANY,
913 format_ip46_address, &server->dhcp_src_address, IP46_TYPE_ANY,
914 server_fib->table_id, rx_fib->table_id);
919 dhcp6_proxy_show_walk (dhcp_server_t *server,
922 vlib_main_t * vm = ctx;
924 vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, server);
929 static clib_error_t *
930 dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
931 unformat_input_t * input,
932 vlib_cli_command_t * cmd)
934 vlib_cli_output (vm, "%U", format_dhcp6_proxy_server, NULL /* header line */);
936 dhcp_proxy_walk(FIB_PROTOCOL_IP6, dhcp6_proxy_show_walk, vm);
941 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
942 .path = "show dhcpv6 proxy",
943 .short_help = "Display dhcpv6 proxy info",
944 .function = dhcpv6_proxy_show_command_fn,
947 static clib_error_t *
948 dhcpv6_vss_command_fn (vlib_main_t * vm,
949 unformat_input_t * input,
950 vlib_cli_command_t * cmd)
952 int is_del = 0, got_new_vss=0;
954 u32 fib_id=0, tbl_id=~0;
956 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
958 if (unformat (input, "oui %d", &oui))
960 else if (unformat (input, "vpn-id %d", &fib_id))
962 else if (unformat (input, "table %d", &tbl_id))
964 else if (unformat(input, "delete") || unformat(input, "del"))
971 return clib_error_return (0, "no table ID specified.");
973 if (is_del || got_new_vss)
977 rv = dhcp_proxy_set_vss(FIB_PROTOCOL_IP6, tbl_id, oui, fib_id, is_del);
983 case VNET_API_ERROR_NO_SUCH_FIB:
984 return clib_error_return (0, "vss info (oui:%d, vpn-id:%d) not found in table %d.",
985 oui, fib_id, tbl_id);
987 case VNET_API_ERROR_NO_SUCH_ENTRY:
988 return clib_error_return (0, "vss for table %d not found in pool.",
992 return clib_error_return (0, "BUG: rv %d", rv);
996 return clib_error_return (0, "parse error`%U'",
997 format_unformat_error, input);
1001 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
1002 .path = "set dhcpv6 vss",
1003 .short_help = "set dhcpv6 vss table <table-id> oui <oui> vpn-idx <vpn-idx>",
1004 .function = dhcpv6_vss_command_fn,
1007 static clib_error_t *
1008 dhcpv6_vss_show_command_fn (vlib_main_t * vm,
1009 unformat_input_t * input,
1010 vlib_cli_command_t * cmd)
1013 dhcp_vss_walk(FIB_PROTOCOL_IP6, dhcp_vss_show_walk, vm);
1018 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1019 .path = "show dhcpv6 vss",
1020 .short_help = "show dhcpv6 VSS",
1021 .function = dhcpv6_vss_show_command_fn,
1024 static clib_error_t *
1025 dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
1026 unformat_input_t * input,
1027 vlib_cli_command_t * cmd)
1030 vnet_main_t *vnm = vnet_get_main();
1031 u32 sw_if_index0=0, sw_if_index;
1032 vnet_sw_interface_t *swif;
1035 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
1038 if (unformat(input, "%U",
1039 unformat_vnet_sw_interface, vnm, &sw_if_index0))
1041 swif = vnet_get_sw_interface (vnm, sw_if_index0);
1042 sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1043 swif->unnumbered_sw_if_index : sw_if_index0;
1044 ia0 = ip6_interface_first_address(&ip6_main, sw_if_index);
1047 vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1049 vlib_cli_output (vm, "%=20U%=48U",
1050 format_vnet_sw_if_index_name, vnm, sw_if_index0,
1051 format_ip6_address, ia0);
1053 vlib_cli_output (vm, "%=34s%=20U", "No IPv6 address configured on",
1054 format_vnet_sw_if_index_name, vnm, sw_if_index);
1062 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1063 .path = "show dhcpv6 link-address interface",
1064 .short_help = "show dhcpv6 link-address interface <interface>",
1065 .function = dhcpv6_link_address_show_command_fn,