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>
21 #include <vnet/fib/ip6_fib.h>
23 static char * dhcpv6_proxy_error_strings[] = {
24 #define dhcpv6_proxy_error(n,s) s,
25 #include "proxy_error.def"
26 #undef dhcpv6_proxy_error
29 #define foreach_dhcpv6_proxy_to_server_input_next \
30 _ (DROP, "error-drop") \
31 _ (LOOKUP, "ip6-lookup") \
32 _ (SEND_TO_CLIENT, "dhcpv6-proxy-to-client")
36 #define _(s,n) DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s,
37 foreach_dhcpv6_proxy_to_server_input_next
39 DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
40 } dhcpv6_proxy_to_server_input_next_t;
43 /* 0 => to server, 1 => to client */
48 u32 original_sw_if_index;
49 } dhcpv6_proxy_trace_t;
51 vlib_node_registration_t dhcpv6_proxy_to_server_node;
52 vlib_node_registration_t dhcpv6_proxy_to_client_node;
55 u8 * format_dhcpv6_proxy_trace (u8 * s, va_list * args)
57 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
58 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
59 dhcpv6_proxy_trace_t * t = va_arg (*args, dhcpv6_proxy_trace_t *);
62 s = format (s, "DHCPV6 proxy: sent to server %U",
63 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
65 s = format (s, "DHCPV6 proxy: sent to client from %U",
66 format_ip6_address, &t->packet_data, sizeof (ip6_address_t));
67 if (t->error != (u32)~0)
68 s = format (s, " error: %s\n", dhcpv6_proxy_error_strings[t->error]);
70 s = format (s, " original_sw_if_index: %d, sw_if_index: %d\n",
71 t->original_sw_if_index, t->sw_if_index);
76 u8 * format_dhcpv6_proxy_header_with_length (u8 * s, va_list * args)
78 dhcpv6_header_t * h = va_arg (*args, dhcpv6_header_t *);
79 u32 max_header_bytes = va_arg (*args, u32);
82 header_bytes = sizeof (h[0]);
83 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
84 return format (s, "dhcpv6 header truncated");
86 s = format (s, "DHCPV6 Proxy");
90 /* get first interface address */
91 static ip6_address_t *
92 ip6_interface_first_global_or_site_address (ip6_main_t * im, u32 sw_if_index)
94 ip_lookup_main_t * lm = &im->lookup_main;
95 ip_interface_address_t * ia = 0;
96 ip6_address_t * result = 0;
98 foreach_ip_interface_address (lm, ia, sw_if_index,
99 1 /* honor unnumbered */,
101 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
102 if ((a->as_u8[0] & 0xe0) == 0x20 ||
103 (a->as_u8[0] & 0xfe) == 0xfc) {
111 /* get first interface address */
112 static ip6_address_t *
113 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
115 ip_lookup_main_t * lm = &im->lookup_main;
116 ip_interface_address_t * ia = 0;
117 ip6_address_t * result = 0;
119 foreach_ip_interface_address (lm, ia, sw_if_index,
120 1 /* honor unnumbered */,
122 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
129 static inline void copy_ip6_address (ip6_address_t *dst, ip6_address_t *src)
132 dst->as_u64[0] = src->as_u64[0];
133 dst->as_u64[1] = src->as_u64[1];
137 dhcpv6_proxy_to_server_input (vlib_main_t * vm,
138 vlib_node_runtime_t * node,
139 vlib_frame_t * from_frame)
141 u32 n_left_from, next_index, * from, * to_next;
142 dhcpv6_proxy_main_t * dpm = &dhcpv6_proxy_main;
143 from = vlib_frame_vector_args (from_frame);
144 n_left_from = from_frame->n_vectors;
145 u32 pkts_to_server=0, pkts_to_client=0;
146 u32 pkts_no_interface_address=0, pkts_no_exceeding_max_hop=0;
147 u32 pkts_no_src_address=0;
148 u32 pkts_wrong_msg_type=0;
150 ip6_main_t * im = &ip6_main;
151 u32 fib_index=0, fib_id=0;
156 next_index = node->cached_next_index;
158 while (n_left_from > 0)
162 vlib_get_next_frame (vm, node, next_index,
163 to_next, n_left_to_next);
165 while (n_left_from > 0 && n_left_to_next > 0)
167 vnet_main_t *vnm = vnet_get_main();
169 u32 original_sw_if_index = 0;
170 vnet_sw_interface_t *swif;
173 udp_header_t * u0, *u1;
174 dhcpv6_header_t * h0; // client msg hdr
175 ip6_header_t * ip0, *ip1;
176 ip6_address_t _ia0, *ia0=&_ia0;
178 u32 error0 = (u32) ~0;
179 dhcpv6_option_t *fwd_opt;
180 dhcpv6_relay_hdr_t *r1;
182 dhcpv6_int_id_t *id1;
184 dhcpv6_client_mac_t *cmac; // client mac
185 ethernet_header_t * e_h0;
186 u8 client_src_mac[6];
187 vlib_buffer_free_list_t *fl;
192 dhcpv6_vss_info *vss;
202 b0 = vlib_get_buffer (vm, bi0);
204 h0 = vlib_buffer_get_current (b0);
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));
215 e_h0 = (void *)ip0 - ethernet_buffer_header_size(b0);
217 clib_memcpy(client_src_mac, e_h0->src_address, 6);
219 switch (h0->u.msg_type) {
220 case DHCPV6_MSG_SOLICIT:
221 case DHCPV6_MSG_REQUEST:
222 case DHCPV6_MSG_CONFIRM:
223 case DHCPV6_MSG_RENEW:
224 case DHCPV6_MSG_REBIND:
225 case DHCPV6_MSG_RELEASE:
226 case DHCPV6_MSG_DECLINE:
227 case DHCPV6_MSG_INFORMATION_REQUEST:
228 case DHCPV6_MSG_RELAY_FORW:
231 case DHCPV6_MSG_RELAY_REPL:
233 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_SEND_TO_CLIENT;
238 /* drop the packet */
239 pkts_wrong_msg_type++;
240 error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
241 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
245 /* relay-option header pointer */
246 vlib_buffer_advance(b0, -(sizeof(*fwd_opt)));
247 fwd_opt = vlib_buffer_get_current(b0);
248 /* relay message header pointer */
249 vlib_buffer_advance(b0, -(sizeof(*r1)));
250 r1 = vlib_buffer_get_current(b0);
252 vlib_buffer_advance(b0, -(sizeof(*u1)));
253 u1 = vlib_buffer_get_current(b0);
255 vlib_buffer_advance(b0, -(sizeof(*ip1)));
256 ip1 = vlib_buffer_get_current(b0);
258 /* fill in all that rubbish... */
259 len = clib_net_to_host_u16(u0->length) - sizeof(udp_header_t);
260 copy_ip6_address(&r1->peer_addr, &ip0->src_address);
262 r1->msg_type = DHCPV6_MSG_RELAY_FORW;
263 fwd_opt->length = clib_host_to_net_u16(len);
264 fwd_opt->option = clib_host_to_net_u16(DHCPV6_OPTION_RELAY_MSG);
267 r1->hop_count = (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW) ? 0 : r1->hop_count;
269 if (PREDICT_FALSE(r1->hop_count >= HOP_COUNT_LIMIT))
271 error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
272 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
273 pkts_no_exceeding_max_hop++;
278 /* If relay-fwd and src address is site or global unicast address */
279 if (h0->u.msg_type == DHCPV6_MSG_RELAY_FORW &&
280 ((ip0->src_address.as_u8[0] & 0xe0) == 0x20 ||
281 (ip0->src_address.as_u8[0] & 0xfe) == 0xfc))
283 /* Set link address to zero */
284 r1->link_addr.as_u64[0] = 0;
285 r1->link_addr.as_u64[1] = 0;
286 goto link_address_set;
289 /* if receiving interface is unnumbered, use receiving interface
290 * IP address as link address, otherwise use the loopback interface
291 * IP address as link address.
293 original_sw_if_index = sw_if_index =
294 vnet_buffer(b0)->sw_if_index[VLIB_RX];
295 swif = vnet_get_sw_interface (vnm, sw_if_index);
296 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
297 sw_if_index = swif->unnumbered_sw_if_index;
299 ia0 = ip6_interface_first_global_or_site_address(&ip6_main, sw_if_index);
302 error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
303 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
304 pkts_no_interface_address++;
308 copy_ip6_address(&r1->link_addr, ia0);
311 fl = vlib_buffer_get_free_list (vm, b0->free_list_index);
313 if ((b0->current_length+sizeof(*id1)+sizeof(*vss1)+sizeof(*cmac))
316 error0 = DHCPV6_PROXY_ERROR_PKT_TOO_BIG;
317 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
322 id1 = (dhcpv6_int_id_t *) (((uword) ip1) + b0->current_length);
323 b0->current_length += (sizeof (*id1));
325 fib_index = im->fib_index_by_sw_if_index
326 [vnet_buffer(b0)->sw_if_index[VLIB_RX]];
327 fib = ip6_fib_get (fib_index);
328 fib_id = fib->table_id;
330 p_vss = hash_get (dpm->vss_index_by_vrf_id,
334 vss = pool_elt_at_index (dpm->vss, p_vss[0]);
335 oui1 = vss->vpn_id.oui;
336 fib_id1 = vss->vpn_id.fib_id;
339 id1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_INTERFACE_ID);
340 id1->opt.length = clib_host_to_net_u16(sizeof(original_sw_if_index));
341 id1->int_idx = clib_host_to_net_u32(original_sw_if_index);
344 if (h0->u.msg_type != DHCPV6_MSG_RELAY_FORW)
346 cmac = (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
347 b0->current_length += (sizeof (*cmac));
348 cmac->opt.length =clib_host_to_net_u16(sizeof(*cmac) -
350 cmac->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
351 cmac->link_type = clib_host_to_net_u16(1); // ethernet
352 clib_memcpy(cmac->data, client_src_mac, 6);
353 u1->length += sizeof(*cmac);
355 if (oui1 || fib_id1) {
356 vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
357 b0->current_length += (sizeof (*vss1));
358 vss1->opt.length =clib_host_to_net_u16(sizeof(*vss1) -
360 vss1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_VSS);
361 vss1->data[0] = 1; // type
362 vss1->data[1] = oui1>>16 & 0xff;
363 vss1->data[2] = oui1>>8 & 0xff;
364 vss1->data[3] = oui1 & 0xff;
365 vss1->data[4] = fib_id1>>24 & 0xff;
366 vss1->data[5] = fib_id1>>16 & 0xff;
367 vss1->data[6] = fib_id1>>8 & 0xff;
368 vss1->data[7] = fib_id1 & 0xff;
369 u1->length += sizeof(*vss1);
374 u1->src_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_client);
375 u1->dst_port = clib_host_to_net_u16(UDP_DST_PORT_dhcpv6_to_server);
378 clib_host_to_net_u16( clib_net_to_host_u16(fwd_opt->length) +
379 sizeof(*r1) + sizeof(*fwd_opt) +
380 sizeof(*u1) + sizeof(*id1) + u1->length);
382 memset(ip1, 0, sizeof(*ip1));
383 ip1->ip_version_traffic_class_and_flow_label = 0x60;
384 ip1->payload_length = u1->length;
385 ip1->protocol = PROTO_UDP;
386 ip1->hop_limit = HOP_COUNT_LIMIT;
387 src = (dpm->dhcpv6_server.as_u64[0] || dpm->dhcpv6_server.as_u64[1]) ?
388 &dpm->dhcpv6_server : &dpm->all_dhcpv6_server_address;
389 copy_ip6_address(&ip1->dst_address, src);
392 ia0 = ip6_interface_first_global_or_site_address
393 (&ip6_main, vnet_buffer(b0)->sw_if_index[VLIB_RX]);
395 src = (dpm->dhcpv6_src_address.as_u64[0] || dpm->dhcpv6_src_address.as_u64[1]) ?
396 &dpm->dhcpv6_src_address : ia0;
399 error0 = DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS;
400 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_DROP;
401 pkts_no_src_address++;
405 copy_ip6_address (&ip1->src_address, src);
408 u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
410 ASSERT(bogus_length == 0);
412 next0 = DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP;
415 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
417 dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
419 tr->which = 0; /* to server */
421 tr->original_sw_if_index = original_sw_if_index;
422 tr->sw_if_index = sw_if_index;
423 if (DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_LOOKUP == next0)
424 copy_ip6_address((ip6_address_t *)&tr->packet_data[0], &dpm->dhcpv6_server);
428 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
429 to_next, n_left_to_next,
433 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
436 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
437 DHCPV6_PROXY_ERROR_RELAY_TO_CLIENT,
439 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
440 DHCPV6_PROXY_ERROR_RELAY_TO_SERVER,
442 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
443 DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS,
444 pkts_no_interface_address);
445 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
446 DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE,
447 pkts_wrong_msg_type);
448 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
449 DHCPV6_PROXY_ERROR_NO_SRC_ADDRESS,
450 pkts_no_src_address);
451 vlib_node_increment_counter (vm, dhcpv6_proxy_to_server_node.index,
452 DHCPV6_PROXY_ERROR_PKT_TOO_BIG,
454 return from_frame->n_vectors;
457 VLIB_REGISTER_NODE (dhcpv6_proxy_to_server_node) = {
458 .function = dhcpv6_proxy_to_server_input,
459 .name = "dhcpv6-proxy-to-server",
460 /* Takes a vector of packets. */
461 .vector_size = sizeof (u32),
463 .n_errors = DHCPV6_PROXY_N_ERROR,
464 .error_strings = dhcpv6_proxy_error_strings,
466 .n_next_nodes = DHCPV6_PROXY_TO_SERVER_INPUT_N_NEXT,
468 #define _(s,n) [DHCPV6_PROXY_TO_SERVER_INPUT_NEXT_##s] = n,
469 foreach_dhcpv6_proxy_to_server_input_next
473 .format_buffer = format_dhcpv6_proxy_header_with_length,
474 .format_trace = format_dhcpv6_proxy_trace,
476 .unformat_buffer = unformat_dhcpv6_proxy_header,
481 dhcpv6_proxy_to_client_input (vlib_main_t * vm,
482 vlib_node_runtime_t * node,
483 vlib_frame_t * from_frame)
486 u32 n_left_from, * from;
487 ethernet_main_t *em = ethernet_get_main (vm);
488 dhcpv6_proxy_main_t * dpm = &dhcpv6_proxy_main;
489 vnet_main_t * vnm = vnet_get_main();
492 from = vlib_frame_vector_args (from_frame);
493 n_left_from = from_frame->n_vectors;
495 while (n_left_from > 0)
499 udp_header_t * u0, *u1=0;
500 dhcpv6_relay_hdr_t * h0;
501 ip6_header_t * ip1 = 0, *ip0;
502 ip6_address_t _ia0, * ia0 = &_ia0;
503 ip6_address_t client_address;
504 ethernet_interface_t *ei0;
505 ethernet_header_t *mac0;
506 vnet_hw_interface_t *hi0;
509 u32 sw_if_index = ~0;
510 u32 original_sw_if_index = ~0;
511 vnet_sw_interface_t *si0;
512 u32 error0 = (u32)~0;
513 vnet_sw_interface_t *swif;
514 dhcpv6_option_t *r0, *o;
516 u32 svr_fib_index, svr_fib_id;
518 ip6_main_t * im = &ip6_main;
524 b0 = vlib_get_buffer (vm, bi0);
525 h0 = vlib_buffer_get_current (b0);
527 if (DHCPV6_MSG_RELAY_REPL != h0->msg_type)
529 error0 = DHCPV6_PROXY_ERROR_WRONG_MESSAGE_TYPE;
532 vlib_node_increment_counter (vm, dhcpv6_proxy_to_client_node.index,
535 f0 = vlib_get_frame_to_node (vm, dpm->error_drop_node_index);
536 to_next0 = vlib_frame_vector_args (f0);
539 vlib_put_frame_to_node (vm, dpm->error_drop_node_index, f0);
542 /* hop count seems not need to be checked */
543 if (HOP_COUNT_LIMIT < h0->hop_count)
545 error0 = DHCPV6_RELAY_PKT_DROP_MAX_HOPS;
548 u0 = (void *)h0 -(sizeof(*u0));
549 ip0 = (void *)u0 -(sizeof(*ip0));
551 vlib_buffer_advance (b0, sizeof(*h0));
552 o = r0 = vlib_buffer_get_current (b0);
554 /* Parse through TLVs looking for option 9 (DHCPV6_OPTION_INTERFACE_ID).
555 The interface-ID is the FIB number we need
556 to track down the client-facing interface */
558 while ((u8 *) o < (b0->data + b0->current_data + b0->current_length))
560 if (DHCPV6_OPTION_INTERFACE_ID == clib_net_to_host_u16(o->option))
562 if (clib_net_to_host_u16(o->length) == sizeof(sw_if_index))
563 sw_if_index = clib_net_to_host_u32(((dhcpv6_int_id_t*)o)->int_idx);
566 o = (dhcpv6_option_t *) (((uword) o) + clib_net_to_host_u16(o->length) + sizeof(*o));
569 if ((u32)~0 == sw_if_index)
571 error0 = DHCPV6_PROXY_ERROR_NO_CIRCUIT_ID_OPTION;
575 svr_fib_index = im->fib_index_by_sw_if_index
576 [vnet_buffer(b0)->sw_if_index[VLIB_RX]];
577 svr_fib = ip6_fib_get (svr_fib_index);
578 svr_fib_id = svr_fib->table_id;
580 if (svr_fib_id != dpm->server_fib_index ||
581 ip0->src_address.as_u64[0] != dpm->dhcpv6_server.as_u64[0] ||
582 ip0->src_address.as_u64[1] != dpm->dhcpv6_server.as_u64[1])
584 //drop packet if not from server with configured address or FIB
585 error0 = DHCPV6_PROXY_ERROR_BAD_SVR_FIB_OR_ADDRESS;
589 vnet_buffer (b0)->sw_if_index[VLIB_TX] = original_sw_if_index
592 swif = vnet_get_sw_interface (vnm, original_sw_if_index);
593 if (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
594 sw_if_index = swif->unnumbered_sw_if_index;
596 vlib_buffer_advance (b0, sizeof(*r0));
598 * udp_local hands us the DHCPV6 header, need udp hdr,
599 * ip hdr to relay to client
601 vlib_buffer_advance (b0, -(sizeof(*u1)));
602 u1 = vlib_buffer_get_current (b0);
604 vlib_buffer_advance (b0, -(sizeof(*ip1)));
605 ip1 = vlib_buffer_get_current (b0);
607 copy_ip6_address(&client_address, &h0->peer_addr);
609 ia0 = ip6_interface_first_address (&ip6_main, sw_if_index);
612 error0 = DHCPV6_PROXY_ERROR_NO_INTERFACE_ADDRESS;
616 len = clib_net_to_host_u16(r0->length);
617 memset(ip1, 0, sizeof(*ip1));
618 copy_ip6_address(&ip1->dst_address, &client_address);
620 u1->src_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_server);
621 u1->dst_port = clib_net_to_host_u16 (UDP_DST_PORT_dhcpv6_to_client);
622 u1->length = clib_host_to_net_u16 (len + sizeof(udp_header_t));
624 ip1->ip_version_traffic_class_and_flow_label =
625 ip0->ip_version_traffic_class_and_flow_label &
627 ip1->payload_length = u1->length;
628 ip1->protocol = PROTO_UDP;
629 ip1->hop_limit = HOP_COUNT_LIMIT;
630 copy_ip6_address(&ip1->src_address, ia0);
632 u1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0, ip1,
634 ASSERT(bogus_length == 0);
636 vlib_buffer_advance (b0, -(sizeof(ethernet_header_t)));
637 si0 = vnet_get_sw_interface (vnm, original_sw_if_index);
638 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
639 vlib_buffer_advance (b0, -4 /* space for VLAN tag */);
641 mac0 = vlib_buffer_get_current (b0);
643 hi0 = vnet_get_sup_hw_interface (vnm, original_sw_if_index);
644 ei0 = pool_elt_at_index (em->interfaces, hi0->hw_instance);
645 clib_memcpy (mac0->src_address, ei0->address, sizeof (ei0->address));
646 memset (&mac0->dst_address, 0xff, sizeof (mac0->dst_address));
647 mac0->type = (si0->type == VNET_SW_INTERFACE_TYPE_SUB) ?
648 clib_net_to_host_u16(0x8100) : clib_net_to_host_u16 (0x86dd);
650 if (si0->type == VNET_SW_INTERFACE_TYPE_SUB)
652 u32 * vlan_tag = (u32 *)(mac0+1);
654 tmp = (si0->sub.id << 16) | 0x0800;
655 *vlan_tag = clib_host_to_net_u32 (tmp);
658 /* $$$ consider adding a dynamic next to the graph node, for performance */
659 f0 = vlib_get_frame_to_node (vm, hi0->output_node_index);
660 to_next0 = vlib_frame_vector_args (f0);
663 vlib_put_frame_to_node (vm, hi0->output_node_index, f0);
666 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
668 dhcpv6_proxy_trace_t *tr = vlib_add_trace (vm, node,
670 tr->which = 1; /* to client */
672 copy_ip6_address((ip6_address_t*)tr->packet_data, ia0);
674 tr->original_sw_if_index = original_sw_if_index;
675 tr->sw_if_index = sw_if_index;
678 return from_frame->n_vectors;
682 VLIB_REGISTER_NODE (dhcpv6_proxy_to_client_node) = {
683 .function = dhcpv6_proxy_to_client_input,
684 .name = "dhcpv6-proxy-to-client",
685 /* Takes a vector of packets. */
686 .vector_size = sizeof (u32),
688 .n_errors = DHCPV6_PROXY_N_ERROR,
689 .error_strings = dhcpv6_proxy_error_strings,
690 .format_buffer = format_dhcpv6_proxy_header_with_length,
691 .format_trace = format_dhcpv6_proxy_trace,
693 .unformat_buffer = unformat_dhcpv6_proxy_header,
697 clib_error_t * dhcpv6_proxy_init (vlib_main_t * vm)
699 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
700 vlib_node_t * error_drop_node;
703 dm->vnet_main = vnet_get_main();
704 error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
705 dm->error_drop_node_index = error_drop_node->index;
707 /* RFC says this is the dhcpv6 server address */
708 dm->all_dhcpv6_server_address.as_u64[0] = clib_host_to_net_u64 (0xFF05000000000000);
709 dm->all_dhcpv6_server_address.as_u64[1] = clib_host_to_net_u64 (0x00010003);
711 /* RFC says this is the server and agent address */
712 dm->all_dhcpv6_server_relay_agent_address.as_u64[0] = clib_host_to_net_u64 (0xFF02000000000000);
713 dm->all_dhcpv6_server_relay_agent_address.as_u64[1] = clib_host_to_net_u64 (0x00010002);
715 udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
716 dhcpv6_proxy_to_client_node.index, 0 /* is_ip4 */);
718 udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_server,
719 dhcpv6_proxy_to_server_node.index, 0 /* is_ip6 */);
723 VLIB_INIT_FUNCTION (dhcpv6_proxy_init);
725 int dhcpv6_proxy_set_server (ip6_address_t *addr, ip6_address_t *src_address,
726 u32 fib_id, int insert_vss, int is_del)
728 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
729 ip6_main_t * im = &ip6_main;
735 dm->dhcpv6_server.as_u64[0] = 0;
736 dm->dhcpv6_server.as_u64[1] = 0;
737 dm->server_fib_index = 0;
738 dm->dhcpv6_src_address.as_u64[0] = 0;
739 dm->dhcpv6_src_address.as_u64[1] = 0;
740 dm->insert_option = 0;
744 if (addr->as_u64[0] == 0 &&
745 addr->as_u64[1] == 0 )
746 return VNET_API_ERROR_INVALID_DST_ADDRESS;
748 if (src_address->as_u64[0] == 0 &&
749 src_address->as_u64[1] == 0)
750 return VNET_API_ERROR_INVALID_SRC_ADDRESS;
752 p = hash_get (im->fib_index_by_table_id, fib_id);
754 return VNET_API_ERROR_NO_SUCH_FIB;
756 copy_ip6_address(&dm->dhcpv6_server, addr);
757 dm->server_fib_index = p[0];
758 copy_ip6_address(&dm->dhcpv6_src_address, src_address);
759 dm->insert_option = insert_vss;
763 static clib_error_t *
764 dhcpv6_proxy_set_command_fn (vlib_main_t * vm,
765 unformat_input_t * input,
766 vlib_cli_command_t * cmd)
768 ip6_address_t addr, src_addr;
769 int set_server = 0, set_src_address = 0, add_opt = 0;
773 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
775 if (unformat (input, "server %U",
776 unformat_ip6_address, &addr))
778 else if (unformat(input, "src-address %U",
779 unformat_ip6_address, &src_addr))
781 else if (unformat (input, "fib-id %d", &fib_id))
783 else if (unformat (input, "add-option")
784 || unformat (input, "insert-option"))
786 else if (unformat (input, "delete") ||
787 unformat (input, "del"))
793 if (is_del || (set_server && set_src_address))
797 rv = dhcpv6_proxy_set_server (&addr, &src_addr, fib_id,
805 return clib_error_return (0, "FIB id %d does not exist", fib_id);
808 return clib_error_return (0, "BUG: rv %d", rv);
812 return clib_error_return (0, "parse error`%U'",
813 format_unformat_error, input);
816 VLIB_CLI_COMMAND (dhcpv6_proxy_set_command, static) = {
817 .path = "set dhcpv6 proxy",
818 .short_help = "set dhcpv6 proxy server <ipv6-addr> fib-id <fib-id> src-address <ipv6-addr>",
819 .function = dhcpv6_proxy_set_command_fn,
822 u8 * format_dhcpv6_proxy_server (u8 * s, va_list * args)
824 dhcpv6_proxy_main_t * dm = va_arg (*args, dhcpv6_proxy_main_t *);
826 u32 fib_id = (u32)~0;
830 s = format (s, "%=40s%=40s%=14s", "Server Address", "Source Address",
835 f = ip6_fib_get (dm->server_fib_index);
837 fib_id = f->table_id;
840 s = format (s, "%=40U%=40U%=14u",
841 format_ip6_address, &dm->dhcpv6_server,
842 format_ip6_address, &dm->dhcpv6_src_address,
847 static clib_error_t *
848 dhcpv6_proxy_show_command_fn (vlib_main_t * vm,
849 unformat_input_t * input,
850 vlib_cli_command_t * cmd)
852 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
854 vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, 0 /* header line */);
855 vlib_cli_output (vm, "%U", format_dhcpv6_proxy_server, dm);
859 VLIB_CLI_COMMAND (dhcpv6_proxy_show_command, static) = {
860 .path = "show dhcpv6 proxy",
861 .short_help = "Display dhcpv6 proxy info",
862 .function = dhcpv6_proxy_show_command_fn,
865 int dhcpv6_proxy_set_vss(u32 tbl_id,
870 dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main;
871 u32 old_oui, old_fib_id;
875 p = hash_get (dm->vss_index_by_vrf_id, tbl_id);
878 v = pool_elt_at_index (dm->vss, p[0]);
880 return VNET_API_ERROR_NO_SUCH_FIB;
882 old_oui = v->vpn_id.oui;
883 old_fib_id = v->vpn_id.fib_id;
887 if (old_oui == oui &&
888 old_fib_id == fib_id )
890 pool_put(dm->vss, v);
891 hash_unset (dm->vss_index_by_vrf_id, tbl_id);
895 return VNET_API_ERROR_NO_SUCH_ENTRY;
898 pool_put(dm->vss, v);
899 hash_unset (dm->vss_index_by_vrf_id, tbl_id);
901 return VNET_API_ERROR_NO_SUCH_ENTRY;
903 pool_get (dm->vss, v);
904 memset (v, ~0, sizeof (*v));
905 v->vpn_id.fib_id = fib_id;
907 hash_set (dm->vss_index_by_vrf_id, tbl_id, v - dm->vss);
913 static clib_error_t *
914 dhcpv6_vss_command_fn (vlib_main_t * vm,
915 unformat_input_t * input,
916 vlib_cli_command_t * cmd)
918 int is_del = 0, got_new_vss=0;
920 u32 fib_id=0, tbl_id=~0;
922 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
924 if (unformat (input, "oui %d", &oui))
926 else if (unformat (input, "vpn-id %d", &fib_id))
928 else if (unformat (input, "table %d", &tbl_id))
930 else if (unformat(input, "delete") || unformat(input, "del"))
937 return clib_error_return (0, "no table ID specified.");
939 if (is_del || got_new_vss)
943 rv = dhcpv6_proxy_set_vss(tbl_id, oui, fib_id, is_del);
949 case VNET_API_ERROR_NO_SUCH_FIB:
950 return clib_error_return (0, "vss info (oui:%d, vpn-id:%d) not found in table %d.",
951 oui, fib_id, tbl_id);
953 case VNET_API_ERROR_NO_SUCH_ENTRY:
954 return clib_error_return (0, "vss for table %d not found in pool.",
958 return clib_error_return (0, "BUG: rv %d", rv);
962 return clib_error_return (0, "parse error`%U'",
963 format_unformat_error, input);
967 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
968 .path = "set dhcpv6 vss",
969 .short_help = "set dhcpv6 vss table <table-id> oui <oui> vpn-idx <vpn-idx>",
970 .function = dhcpv6_vss_command_fn,
973 static clib_error_t *
974 dhcpv6_vss_show_command_fn (vlib_main_t * vm,
975 unformat_input_t * input,
976 vlib_cli_command_t * cmd)
979 dhcpv6_proxy_main_t * dm = &dhcpv6_proxy_main;
986 vlib_cli_output (vm, "%=6s%=6s%=12s","Table", "OUI", "VPN ID");
987 hash_foreach (tbl_id, index, dm->vss_index_by_vrf_id,
989 v = pool_elt_at_index (dm->vss, index);
991 fib_id = v->vpn_id.fib_id;
992 vlib_cli_output (vm, "%=6d%=6d%=12d",
993 tbl_id, oui, fib_id);
999 VLIB_CLI_COMMAND (dhcpv6_proxy_vss_show_command, static) = {
1000 .path = "show dhcpv6 vss",
1001 .short_help = "show dhcpv6 VSS",
1002 .function = dhcpv6_vss_show_command_fn,
1005 static clib_error_t *
1006 dhcpv6_link_address_show_command_fn (vlib_main_t * vm,
1007 unformat_input_t * input,
1008 vlib_cli_command_t * cmd)
1011 dhcpv6_proxy_main_t *dm = &dhcpv6_proxy_main;
1012 vnet_main_t *vnm = vnet_get_main();
1013 u32 sw_if_index0=0, sw_if_index;
1015 vnet_sw_interface_t *swif;
1017 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
1020 if (unformat(input, "%U",
1021 unformat_vnet_sw_interface, dm->vnet_main, &sw_if_index0))
1023 swif = vnet_get_sw_interface (vnm, sw_if_index0);
1024 sw_if_index = (swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED) ?
1025 swif->unnumbered_sw_if_index : sw_if_index0;
1026 ia0 = ip6_interface_first_address(&ip6_main, sw_if_index);
1029 vlib_cli_output (vm, "%=20s%=48s", "interface", "link-address");
1031 vlib_cli_output (vm, "%=20U%=48U",
1032 format_vnet_sw_if_index_name, dm->vnet_main, sw_if_index0,
1033 format_ip6_address, ia0);
1035 vlib_cli_output (vm, "%=34s%=20U", "No IPv6 address configured on",
1036 format_vnet_sw_if_index_name, dm->vnet_main, sw_if_index);
1044 VLIB_CLI_COMMAND (dhcpv6_proxy_address_show_command, static) = {
1045 .path = "show dhcpv6 link-address interface",
1046 .short_help = "show dhcpv6 link-address interface <interface>",
1047 .function = dhcpv6_link_address_show_command_fn,