2 * 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/dhcpv6/proxy.h>
22 static char * dhcpv6_proxy_error_strings[] = {
23 #define dhcpv6_proxy_error(n,s) s,
24 #include "proxy_error.def"
25 #undef dhcpv6_proxy_error
28 #define foreach_dhcpv6_proxy_to_server_input_next \
29 _ (DROP, "error-drop") \
30 _ (LOOKUP, "ip6-lookup") \
31 _ (SEND_TO_CLIENT, "dhcpv6-proxy-to-client")
35 #define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
36 foreach_dhcpv6_proxy_to_server_input_next
38 DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
39 } dhcpv6_proxy_to_server_input_next_t;
42 /* 0 => to server, 1 => to client */
47 u32 original_sw_if_index;
48 } dhcpv6_proxy_trace_t;
50 vlib_node_registration_t dhcpv6_proxy_to_server_node;
51 vlib_node_registration_t dhcpv6_proxy_to_client_node;
54 u8 * format_dhcpv6_proxy_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 dhcpv6_proxy_trace_t * t = va_arg (*args, dhcpv6_proxy_trace_t *);
61 s = format (s, "DHCPV6 proxy: sent to server %U",
62 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
64 s = format (s, "DHCPV6 proxy: sent to client from %U",
65 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
66 if (t->error != (u32)~0)
67 s = format (s, " error: %s\n", dhcpv6_proxy_error_strings[t->error]);
69 s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
70 t->original_sw_if_index, t->sw_if_index);
75 u8 * format_dhcpv6_proxy_header_with_length (u8 * s, va_list * args)
77 dhcpv6_header_t * h = va_arg (*args, dhcpv6_header_t *);
78 u32 max_header_bytes = va_arg (*args, u32);
81 header_bytes = sizeof (h[0]);
82 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
83 return format (s, "dhcpv6 header truncated");
85 s = format (s, "DHCPV6 Proxy");
89 /* get first interface address */
90 static ip6_address_t *
91 ip6_interface_first_global_or_site_address (ip6_main_t * im, u32 sw_if_index)
93 ip_lookup_main_t * lm = &im->lookup_main;
94 ip_interface_address_t * ia = 0;
95 ip6_address_t * result = 0;
97 foreach_ip_interface_address (lm, ia, sw_if_index,
98 1 /* honor unnumbered */,
100 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
101 if ((a->as_u8[0] & 0xe0) == 0x20 ||
102 (a->as_u8[0] & 0xfe) == 0xfc) {
110 /* get first interface address */
111 static ip6_address_t *
112 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
114 ip_lookup_main_t * lm = &im->lookup_main;
115 ip_interface_address_t * ia = 0;
116 ip6_address_t * result = 0;
118 foreach_ip_interface_address (lm, ia, sw_if_index,
119 1 /* honor unnumbered */,
121 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
128 static inline void copy_ip6_address (ip6_address_t *dst, ip6_address_t *src)
131 dst->as_u64[0] = src->as_u64[0];
132 dst->as_u64[1] = src->as_u64[1];
136 dhcpv6_proxy_to_server_input (vlib_main_t * vm,
137 vlib_node_runtime_t * node,
138 vlib_frame_t * from_frame)
140 u32 n_left_from, next_index, * from, * to_next;
141 dhcpv6_proxy_main_t * dpm = &dhcpv6_proxy_main;
142 from = vlib_frame_vector_args (from_frame);
143 n_left_from = from_frame->n_vectors;
144 u32 pkts_to_server=0, pkts_to_client=0;
145 u32 pkts_no_interface_address=0, pkts_no_exceeding_max_hop=0;
146 u32 pkts_no_src_address=0;
147 u32 pkts_wrong_msg_type=0;
149 ip6_main_t * im = &ip6_main;
150 u32 fib_index=0, fib_id=0;
155 next_index = node->cached_next_index;
157 while (n_left_from > 0)
161 vlib_get_next_frame (vm, node, next_index,
162 to_next, n_left_to_next);
164 while (n_left_from > 0 && n_left_to_next > 0)
166 vnet_main_t *vnm = vnet_get_main();
168 u32 original_sw_if_index = 0;
169 vnet_sw_interface_t *swif;
172 udp_header_t * u0, *u1;
173 dhcpv6_header_t * h0; // client msg hdr
174 ip6_header_t * ip0, *ip1;
175 ip6_address_t _ia0, *ia0=&_ia0;
177 u32 error0 = (u32) ~0;
178 dhcpv6_option_t *fwd_opt;
179 dhcpv6_relay_hdr_t *r1;
181 dhcpv6_int_id_t *id1;
183 dhcpv6_client_mac_t *cmac; // client mac
184 ethernet_header_t * e_h0;
185 u8 client_src_mac[6];
186 vlib_buffer_free_list_t *fl;
191 dhcpv6_vss_info *vss;
201 b0 = vlib_get_buffer (vm, bi0);
203 h0 = vlib_buffer_get_current (b0);
204 e_h0 = (ethernet_header_t *)b0->data;
205 clib_memcpy(client_src_mac, e_h0->src_address, 6);
206 /* Send to DHCPV6 server via the configured FIB */
207 vnet_buffer(b0)->sw_if_index[VLIB_TX] =
208 dpm->server_fib_index;
211 * udp_local hands us the DHCPV6 header.
213 u0 = (void *)h0 -(sizeof(*u0));
214 ip0 = (void *)u0 -(sizeof(*ip0));
216 switch (h0->u.msg_type) {
217 case DHCPV6_MSG_SOLICIT:
218 case DHCPV6_MSG_REQUEST:
219 case DHCPV6_MSG_CONFIRM:
220 case DHCPV6_MSG_RENEW:
221 case DHCPV6_MSG_REBIND:
222 case DHCPV6_MSG_RELEASE:
223 case DHCPV6_MSG_DECLINE:
224 case DHCPV6_MSG_INFORMATION_REQUEST:
225 case DHCPV6_MSG_RELAY_FORW:
228 case DHCPV6_MSG_RELAY_REPL:
230 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
235 /* drop the packet */
236 pkts_wrong_msg_type++;
237 error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
238 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
242 /* relay-option header pointer */
243 vlib_buffer_advance(b0, -(sizeof(*fwd_opt)));
244 fwd_opt = vlib_buffer_get_current(b0);
245 /* relay message header pointer */
246 vlib_buffer_advance(b0, -(sizeof(*r1)));
247 r1 = vlib_buffer_get_current(b0);
249 vlib_buffer_advance(b0, -(sizeof(*u1)));
250 u1 = vlib_buffer_get_current(b0);
252 vlib_buffer_advance(b0, -(sizeof(*ip1)));
253 ip1 = vlib_buffer_get_current(b0);
255 /* fill in all that rubbish... */
256 len = clib_net_to_host_u16(u0->length) - sizeof(udp_header_t);
257 copy_ip6_address(&r1->peer_addr, &ip0->src_address);
259 r1->msg_type = DHCPV6_MSG_RELAY_FORW;
260 fwd_opt->length = clib_host_to_net_u16(len);
261 fwd_opt->option = clib_host_to_net_u16(DHCPV6_OPTION_RELAY_MSG);
264 r1->hop_count = (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
266 if (PREDICT_FALSE(r1->hop_count >= HOP_COUNT_LIMIT))
268 error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
269 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
270 pkts_no_exceeding_max_hop++;
275 /* If relay-fwd and src address is site or global unicast address */
276 if (h0->u.msg_type == DHCPV6_MSG_RELAY_FORW &&
277 ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
278 (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
280 /* Set link address to zero */
281 r1->link_addr.as_u64[0] = 0;
282 r1->link_addr.as_u64[1] = 0;
283 goto link_address_set;
286 /* if receiving interface is unnumbered, use receiving interface
287 * IP address as link address, otherwise use the loopback interface
288 * IP address as link address.
290 original_sw_if_index = sw_if_index =
291 vnet_buffer(b0)->sw_if_index[VLIB_RX];
292 swif = vnet_get_sw_interface (vnm, sw_if_index);
293 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
294 sw_if_index = swif->unnumbered_sw_if_index;
296 ia0 = ip6_interface_first_global_or_site_address(&ip6_main, sw_if_index);
299 error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
300 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
301 pkts_no_interface_address++;
305 copy_ip6_address(&r1->link_addr, ia0);
308 fl = vlib_buffer_get_free_list (vm, b0->free_list_index);
310 if ((b0->current_length+sizeof(*id1)+sizeof(*vss1)+sizeof(*cmac))
313 error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
314 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
319 id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
320 b0->current_length += (sizeof (*id1));
322 fib_index = im->fib_index_by_sw_if_index
323 [vnet_buffer(b0)->sw_if_index[VLIB_RX]];
324 fib = vec_elt_at_index (im->fibs, fib_index);
325 fib_id = fib->table_id;
327 p_vss = hash_get (dpm->vss_index_by_vrf_id,
331 vss = pool_elt_at_index (dpm->vss, p_vss[0]);
332 oui1 = vss->vpn_id.oui;
333 fib_id1 = vss->vpn_id.fib_id;
336 id1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_INTERFACE_ID);
337 id1->opt.length = clib_host_to_net_u16(sizeof(original_sw_if_index));
338 id1->int_idx = clib_host_to_net_u32(original_sw_if_index);
341 if (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW)
343 cmac = (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
344 b0->current_length += (sizeof (*cmac));
345 cmac->opt.length =clib_host_to_net_u16(sizeof(*cmac) -
347 cmac->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
348 cmac->link_type = clib_host_to_net_u16(1); // ethernet
349 clib_memcpy(cmac->data, client_src_mac, 6);
350 u1->length += sizeof(*cmac);
352 if (oui1 || fib_id1) {
353 vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
354 b0->current_length += (sizeof (*vss1));
355 vss1->opt.length =clib_host_to_net_u16(sizeof(*vss1) -
357 vss1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_VSS);
358 vss1->data[0] = 1; // type
359 vss1->data[1] = oui1>>16 & 0xff;
360 vss1->data[2] = oui1>>8 & 0xff;
361 vss1->data[3] = oui1 & 0xff;
362 vss1->data[4] = fib_id1>>24 & 0xff;
363 vss1->data[5] = fib_id1>>16 & 0xff;
364 vss1->data[6] = fib_id1>>8 & 0xff;
365 vss1->data[7] = fib_id1 & 0xff;
366 u1->length += sizeof(*vss1);
371 u1->src_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_client);
372 u1->dst_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_server);
375 clib_host_to_net_u16( clib_net_to_host_u16(fwd_opt->length) +
376 sizeof(*r1) + sizeof(*fwd_opt) +
377 sizeof(*u1) + sizeof(*id1) + u1->length);
379 memset(ip1, 0, sizeof(*ip1));
380 ip1->ip_version_traffic_class_and_flow_label = 0x60;
381 ip1->payload_length = u1->length;
382 ip1->protocol = PROTO_UDP;
383 ip1->hop_limit = HOP_COUNT_LIMIT;
384 src = (dpm->dhcpv6_server.as_u64[0] || dpm->dhcpv6_server.as_u64[1]) ?
385 &dpm->dhcpv6_server : &dpm->all_dhcpv6_server_address;
386 copy_ip6_address(&ip1->dst_address, src);
389 ia0 = ip6_interface_first_global_or_site_address
390 (&ip6_main, vnet_buffer(b0)->sw_if_index[VLIB_RX]);
392 src = (dpm->dhcpv6_src_address.as_u64[0] || dpm->dhcpv6_src_address.as_u64[1]) ?
393 &dpm->dhcpv6_src_address : ia0;
396 error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
397 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
398 pkts_no_src_address++;
402 copy_ip6_address (&ip1->src_address, src);
405 u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
407 ASSERT(bogus_length == 0);
409 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
412 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
414 dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
416 tr->which = 0; /* to server */
418 tr->original_sw_if_index = original_sw_if_index;
419 tr->sw_if_index = sw_if_index;
420 if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
421 copy_ip6_address((ip6_address_t *)&tr->packet_data[0], &dpm->dhcpv6_server);
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, dhcpv6_proxy_to_server_node.index,
434 DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
436 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
437 DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
439 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
440 DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
441 pkts_no_interface_address);
442 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
443 DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
444 pkts_wrong_msg_type);
445 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
446 DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
447 pkts_no_src_address);
448 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
449 DHCPV6_PROXY_ERROR_PKT_TOO_BIG,
451 return from_frame->n_vectors;
454 VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node) = {
455 .function = dhcpv6_proxy_to_server_input,
456 .name = "dhcpv6-proxy-to-server",
457 /* Takes a vector of packets. */
458 .vector_size = sizeof (u32),
460 .n_errors = DHCPV6_PROXY_N_ERROR,
461 .error_strings = dhcpv6_proxy_error_strings,
463 .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
465 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
466 foreach_dhcpv6_proxy_to_server_input_next
470 .format_buffer = format_dhcpv6_proxy_header_with_length,
471 .format_trace = format_dhcpv6_proxy_trace,
473 .unformat_buffer = unformat_dhcpv6_proxy_header,
478 dhcpv6_proxy_to_client_input (vlib_main_t * vm,
479 vlib_node_runtime_t * node,
480 vlib_frame_t * from_frame)
483 u32 n_left_from, * from;
484 ethernet_main_t *em = ethernet_get_main (vm);
485 dhcpv6_proxy_main_t * dpm = &dhcpv6_proxy_main;
486 vnet_main_t * vnm = vnet_get_main();
489 from = vlib_frame_vector_args (from_frame);
490 n_left_from = from_frame->n_vectors;
492 while (n_left_from > 0)
496 udp_header_t * u0, *u1=0;
497 dhcpv6_relay_hdr_t * h0;
498 ip6_header_t * ip1 = 0, *ip0;
499 ip6_address_t _ia0, * ia0 = &_ia0;
500 ip6_address_t client_address;
501 ethernet_interface_t *ei0;
502 ethernet_header_t *mac0;
503 vnet_hw_interface_t *hi0;
506 u32 sw_if_index = ~0;
507 u32 original_sw_if_index = ~0;
508 vnet_sw_interface_t *si0;
509 u32 error0 = (u32)~0;
510 vnet_sw_interface_t *swif;
511 dhcpv6_option_t *r0, *o;
513 u32 svr_fib_index, svr_fib_id;
515 ip6_main_t * im = &ip6_main;
521 b0 = vlib_get_buffer (vm, bi0);
522 h0 = vlib_buffer_get_current (b0);
524 if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
526 error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
529 vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
532 f0 = vlib_get_frame_to_node (vm, dpm->error_drop_node_index);
533 to_next0 = vlib_frame_vector_args (f0);
536 vlib_put_frame_to_node (vm, dpm->error_drop_node_index, f0);
539 /* hop count seems not need to be checked */
540 if (HOP_COUNT_LIMIT < h0->hop_count)
542 error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
545 u0 = (void *)h0 -(sizeof(*u0));
546 ip0 = (void *)u0 -(sizeof(*ip0));
548 vlib_buffer_advance (b0, sizeof(*h0));
549 o = r0 = vlib_buffer_get_current (b0);
551 /* Parse through TLVs looking for option 9 (DHCPV6_OPTION_INTERFACE_ID).
552 The interface-ID is the FIB number we need
553 to track down the client-facing interface */
555 while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
557 if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16(o->option))
559 if (clib_net_to_host_u16(o->length) == sizeof(sw_if_index))
560 sw_if_index = clib_net_to_host_u32(((dhcpv6_int_id_t*)o)->int_idx);
563 o = (dhcpv6_option_t *) (((uword) o) + clib_net_to_host_u16(o->length) + sizeof(*o));
566 if ((u32)~0 == sw_if_index)
568 error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
572 svr_fib_index = im->fib_index_by_sw_if_index
573 [vnet_buffer(b0)->sw_if_index[VLIB_RX]];
574 svr_fib = vec_elt_at_index (im->fibs, svr_fib_index);
575 svr_fib_id = svr_fib->table_id;
577 if (svr_fib_id != dpm->server_fib_index ||
578 ip0->src_address.as_u64[0] != dpm->dhcpv6_server.as_u64[0] ||
579 ip0->src_address.as_u64[1] != dpm->dhcpv6_server.as_u64[1])
581 //drop packet if not from server with configured address or FIB
582 error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
586 vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
589 swif = vnet_get_sw_interface (vnm, original_sw_if_index);
590 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
591 sw_if_index = swif->unnumbered_sw_if_index;
593 vlib_buffer_advance (b0, sizeof(*r0));
595 * udp_local hands us the DHCPV6 header, need udp hdr,
596 * ip hdr to relay to client
598 vlib_buffer_advance (b0, -(sizeof(*u1)));
599 u1 = vlib_buffer_get_current (b0);
601 vlib_buffer_advance (b0, -(sizeof(*ip1)));
602 ip1 = vlib_buffer_get_current (b0);
604 copy_ip6_address(&client_address, &h0->peer_addr);
606 ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
609 error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
613 len = clib_net_to_host_u16(r0->length);
614 memset(ip1, 0, sizeof(*ip1));
615 copy_ip6_address(&ip1->dst_address, &client_address);
617 u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
618 u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
619 u1->length = clib_host_to_net_u16 (len + sizeof(udp_header_t));
621 ip1->ip_version_traffic_class_and_flow_label =
622 ip0->ip_version_traffic_class_and_flow_label &
624 ip1->payload_length = u1->length;
625 ip1->protocol = PROTO_UDP;
626 ip1->hop_limit = HOP_COUNT_LIMIT;
627 copy_ip6_address(&ip1->src_address, ia0);
629 u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
631 ASSERT(bogus_length == 0);
633 vlib_buffer_advance (b0, -(sizeof(ethernet_header_t)));
634 si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
635 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
636 vlib_buffer_advance (b0, -4 /* space for VLAN tag */);
638 mac0 = vlib_buffer_get_current (b0);
640 hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
641 ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
642 clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
643 memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
644 mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
645 clib_net_to_host_u16(0x8100) : clib_net_to_host_u16 (0x86dd);
647 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
649 u32 * vlan_tag = (u32 *)(mac0+1);
651 tmp = (si0->sub.id << 16) | 0x0800;
652 *vlan_tag = clib_host_to_net_u32 (tmp);
655 /* $$$ consider adding a dynamic next to the graph node, for performance */
656 f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
657 to_next0 = vlib_frame_vector_args (f0);
660 vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
663 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
665 dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
667 tr->which = 1; /* to client */
669 copy_ip6_address((ip6_address_t*)tr->packet_data, ia0);
671 tr->original_sw_if_index = original_sw_if_index;
672 tr->sw_if_index = sw_if_index;
675 return from_frame->n_vectors;
679 VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node) = {
680 .function = dhcpv6_proxy_to_client_input,
681 .name = "dhcpv6-proxy-to-client",
682 /* Takes a vector of packets. */
683 .vector_size = sizeof (u32),
685 .n_errors = DHCPV6_PROXY_N_ERROR,
686 .error_strings = dhcpv6_proxy_error_strings,
687 .format_buffer = format_dhcpv6_proxy_header_with_length,
688 .format_trace = format_dhcpv6_proxy_trace,
690 .unformat_buffer = unformat_dhcpv6_proxy_header,
694 clib_error_t * dhcpv6_proxy_init (vlib_main_t * vm)
696 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
697 vlib_node_t * error_drop_node;
700 dm->vnet_main = vnet_get_main();
701 error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
702 dm->error_drop_node_index = error_drop_node->index;
704 /* RFC says this is the dhcpv6 server address */
705 dm->all_dhcpv6_server_address.as_u64[0] = clib_host_to_net_u64 (0xFF05000000000000);
706 dm->all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
708 /* RFC says this is the server and agent address */
709 dm->all_dhcpv6_server_relay_agent_address.as_u64[0] = clib_host_to_net_u64 (0xFF02000000000000);
710 dm->all_dhcpv6_server_relay_agent_address.as_u64[1] = clib_host_to_net_u64 (0x00010002);
712 udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
713 dhcpv6_proxy_to_client_node.index, 0 /* is_ip4 */);
715 udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
716 dhcpv6_proxy_to_server_node.index, 0 /* is_ip6 */);
720 VLIB_INIT_FUNCTION (dhcpv6_proxy_init);
722 int dhcpv6_proxy_set_server (ip6_address_t *addr, ip6_address_t *src_address,
723 u32 fib_id, int insert_vss, int is_del)
725 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
726 ip6_main_t * im = &ip6_main;
732 dm->dhcpv6_server.as_u64[0] = 0;
733 dm->dhcpv6_server.as_u64[1] = 0;
734 dm->server_fib_index = 0;
735 dm->dhcpv6_src_address.as_u64[0] = 0;
736 dm->dhcpv6_src_address.as_u64[1] = 0;
737 dm->insert_option = 0;
741 if (addr->as_u64[0] == 0 &&
742 addr->as_u64[1] == 0 )
743 return VNET_API_ERROR_INVALID_DST_ADDRESS;
745 if (src_address->as_u64[0] == 0 &&
746 src_address->as_u64[1] == 0)
747 return VNET_API_ERROR_INVALID_SRC_ADDRESS;
749 p = hash_get (im->fib_index_by_table_id, fib_id);
751 return VNET_API_ERROR_NO_SUCH_FIB;
753 copy_ip6_address(&dm->dhcpv6_server, addr);
754 dm->server_fib_index = p[0];
755 copy_ip6_address(&dm->dhcpv6_src_address, src_address);
756 dm->insert_option = insert_vss;
760 static clib_error_t *
761 dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
762 unformat_input_t * input,
763 vlib_cli_command_t * cmd)
765 ip6_address_t addr, src_addr;
766 int set_server = 0, set_src_address = 0, add_opt = 0;
770 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
772 if (unformat (input, "server %U",
773 unformat_ip6_address, &addr))
775 else if (unformat(input, "src-address %U",
776 unformat_ip6_address, &src_addr))
778 else if (unformat (input, "fib-id %d", &fib_id))
780 else if (unformat (input, "add-option")
781 || unformat (input, "insert-option"))
783 else if (unformat (input, "delete") ||
784 unformat (input, "del"))
790 if (is_del || (set_server && set_src_address))
794 rv = dhcpv6_proxy_set_server (&addr, &src_addr, fib_id,
802 return clib_error_return (0, "FIB id %d does not exist", fib_id);
805 return clib_error_return (0, "BUG: rv %d", rv);
809 return clib_error_return (0, "parse error`%U'",
810 format_unformat_error, input);
813 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
814 .path = "set dhcpv6 proxy",
815 .short_help = "set dhcpv6 proxy server <ipv6-addr> fib-id <fib-id> src-address <ipv6-addr>",
816 .function = dhcpv6_proxy_set_command_fn,
819 u8 * format_dhcpv6_proxy_server (u8 * s, va_list * args)
821 dhcpv6_proxy_main_t * dm = va_arg (*args, dhcpv6_proxy_main_t *);
823 u32 fib_id = (u32)~0;
827 s = format (s, "%=40s%=40s%=14s", "Server Address", "Source Address",
832 f = find_ip6_fib_by_table_index_or_id (&ip6_main, dm->server_fib_index,
833 IP6_ROUTE_FLAG_FIB_INDEX);
835 fib_id = f->table_id;
838 s = format (s, "%=40U%=40U%=14u",
839 format_ip6_address, &dm->dhcpv6_server,
840 format_ip6_address, &dm->dhcpv6_src_address,
845 static clib_error_t *
846 dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
847 unformat_input_t * input,
848 vlib_cli_command_t * cmd)
850 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
852 vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, 0 /* header line */);
853 vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, dm);
857 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
858 .path = "show dhcpv6 proxy",
859 .short_help = "Display dhcpv6 proxy info",
860 .function = dhcpv6_proxy_show_command_fn,
863 int dhcpv6_proxy_set_vss(u32 tbl_id,
868 dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main;
869 u32 old_oui, old_fib_id;
873 p = hash_get (dm->vss_index_by_vrf_id, tbl_id);
876 v = pool_elt_at_index (dm->vss, p[0]);
878 return VNET_API_ERROR_NO_SUCH_FIB;
880 old_oui = v->vpn_id.oui;
881 old_fib_id = v->vpn_id.fib_id;
885 if (old_oui == oui &&
886 old_fib_id == fib_id )
888 pool_put(dm->vss, v);
889 hash_unset (dm->vss_index_by_vrf_id, tbl_id);
893 return VNET_API_ERROR_NO_SUCH_ENTRY;
896 pool_put(dm->vss, v);
897 hash_unset (dm->vss_index_by_vrf_id, tbl_id);
899 return VNET_API_ERROR_NO_SUCH_ENTRY;
901 pool_get (dm->vss, v);
902 memset (v, ~0, sizeof (*v));
903 v->vpn_id.fib_id = fib_id;
905 hash_set (dm->vss_index_by_vrf_id, tbl_id, v - dm->vss);
911 static clib_error_t *
912 dhcpv6_vss_command_fn (vlib_main_t * vm,
913 unformat_input_t * input,
914 vlib_cli_command_t * cmd)
916 int is_del = 0, got_new_vss=0;
918 u32 fib_id=0, tbl_id=~0;
920 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
922 if (unformat (input, "oui %d", &oui))
924 else if (unformat (input, "vpn-id %d", &fib_id))
926 else if (unformat (input, "table %d", &tbl_id))
928 else if (unformat(input, "delete") || unformat(input, "del"))
935 return clib_error_return (0, "no table ID specified.");
937 if (is_del || got_new_vss)
941 rv = dhcpv6_proxy_set_vss(tbl_id, oui, fib_id, is_del);
947 case VNET_API_ERROR_NO_SUCH_FIB:
948 return clib_error_return (0, "vss info (oui:%d, vpn-id:%d) not found in table %d.",
949 oui, fib_id, tbl_id);
951 case VNET_API_ERROR_NO_SUCH_ENTRY:
952 return clib_error_return (0, "vss for table %d not found in pool.",
956 return clib_error_return (0, "BUG: rv %d", rv);
960 return clib_error_return (0, "parse error`%U'",
961 format_unformat_error, input);
965 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
966 .path = "set dhcpv6 vss",
967 .short_help = "set dhcpv6 vss table <table-id> oui <oui> vpn-idx <vpn-idx>",
968 .function = dhcpv6_vss_command_fn,
971 static clib_error_t *
972 dhcpv6_vss_show_command_fn (vlib_main_t * vm,
973 unformat_input_t * input,
974 vlib_cli_command_t * cmd)
977 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
984 vlib_cli_output (vm, "%=6s%=6s%=12s","Table", "OUI", "VPN ID");
985 hash_foreach (tbl_id, index, dm->vss_index_by_vrf_id,
987 v = pool_elt_at_index (dm->vss, index);
989 fib_id = v->vpn_id.fib_id;
990 vlib_cli_output (vm, "%=6d%=6d%=12d",
991 tbl_id, oui, fib_id);
997 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
998 .path = "show dhcpv6 vss",
999 .short_help = "show dhcpv6 VSS",
1000 .function = dhcpv6_vss_show_command_fn,
1003 static clib_error_t *
1004 dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
1005 unformat_input_t * input,
1006 vlib_cli_command_t * cmd)
1009 dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main;
1010 vnet_main_t *vnm = vnet_get_main();
1011 u32 sw_if_index0=0, sw_if_index;
1013 vnet_sw_interface_t *swif;
1015 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
1018 if (unformat(input, "%U",
1019 unformat_vnet_sw_interface, dm->vnet_main, &sw_if_index0))
1021 swif = vnet_get_sw_interface (vnm, sw_if_index0);
1022 sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1023 swif->unnumbered_sw_if_index : sw_if_index0;
1024 ia0 = ip6_interface_first_address(&ip6_main, sw_if_index);
1027 vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1029 vlib_cli_output (vm, "%=20U%=48U",
1030 format_vnet_sw_if_index_name, dm->vnet_main, sw_if_index0,
1031 format_ip6_address, ia0);
1033 vlib_cli_output (vm, "%=34s%=20U", "No IPv6 address configured on",
1034 format_vnet_sw_if_index_name, dm->vnet_main, sw_if_index);
1042 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1043 .path = "show dhcpv6 link-address interface",
1044 .short_help = "show dhcpv6 link-address interface <interface>",
1045 .function = dhcpv6_link_address_show_command_fn,