2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vlib/vlib.h>
16 #include <vnet/dhcp/client.h>
17 #include <vnet/dhcp/dhcp_proxy.h>
18 #include <vnet/fib/fib_table.h>
20 dhcp_client_main_t dhcp_client_main;
21 static u8 * format_dhcp_client_state (u8 * s, va_list * va);
22 static vlib_node_registration_t dhcp_client_process_node;
25 dhcp_client_acquire_address (dhcp_client_main_t * dcm, dhcp_client_t * c)
28 * Install any/all info gleaned from dhcp, right here
30 ip4_add_del_interface_address (dcm->vlib_main, c->sw_if_index,
31 (void *) &c->leased_address,
32 c->subnet_mask_width, 0 /*is_del*/);
36 dhcp_client_release_address (dhcp_client_main_t * dcm, dhcp_client_t * c)
39 * Remove any/all info gleaned from dhcp, right here. Caller(s)
40 * have not wiped out the info yet.
43 ip4_add_del_interface_address (dcm->vlib_main, c->sw_if_index,
44 (void *) &c->leased_address,
45 c->subnet_mask_width, 1 /*is_del*/);
49 set_l2_rewrite (dhcp_client_main_t * dcm, dhcp_client_t * c)
51 /* Acquire the L2 rewrite string for the indicated sw_if_index */
52 c->l2_rewrite = vnet_build_rewrite_for_sw_interface(
60 * dhcp_client_for_us - server-to-client callback.
61 * Called from proxy_node.c:dhcp_proxy_to_client_input().
62 * This function first decides that the packet in question is
63 * actually for the dhcp client code in case we're also acting as
64 * a dhcp proxy. Ay caramba, what a folly!
66 int dhcp_client_for_us (u32 bi, vlib_buffer_t * b,
71 dhcp_client_main_t * dcm = &dhcp_client_main;
72 vlib_main_t * vm = dcm->vlib_main;
75 f64 now = vlib_time_now (dcm->vlib_main);
76 u8 dhcp_message_type = 0;
80 * Doing dhcp client on this interface?
81 * Presumably we will always receive dhcp clnt for-us pkts on
82 * the interface that's asking for an address.
84 p = hash_get (dcm->client_by_sw_if_index,
85 vnet_buffer(b)->sw_if_index [VLIB_RX]);
89 c = pool_elt_at_index (dcm->clients, p[0]);
91 /* Mixing dhcp relay and dhcp proxy? DGMS... */
92 if (c->state == DHCP_BOUND && c->retry_count == 0)
95 /* parse through the packet, learn what we can */
96 if (dhcp->your_ip_address.as_u32)
97 c->leased_address.as_u32 = dhcp->your_ip_address.as_u32;
99 o = (dhcp_option_t *) dhcp->options;
101 while (o->option != 0xFF /* end of options */ &&
102 (u8 *) o < (b->data + b->current_data + b->current_length))
106 case 53: /* dhcp message type */
107 dhcp_message_type = o->data[0];
110 case 51: /* lease time */
112 u32 lease_time_in_seconds =
113 clib_host_to_net_u32 (o->data_as_u32[0]);
114 c->lease_expires = now + (f64) lease_time_in_seconds;
115 c->lease_lifetime = lease_time_in_seconds;
116 /* Set a sensible default, in case we don't get opt 58 */
117 c->lease_renewal_interval = lease_time_in_seconds / 2;
121 case 58: /* lease renew time in seconds */
123 u32 lease_renew_time_in_seconds =
124 clib_host_to_net_u32 (o->data_as_u32[0]);
125 c->lease_renewal_interval = lease_renew_time_in_seconds;
129 case 54: /* dhcp server address */
130 c->dhcp_server.as_u32 = o->data_as_u32[0];
133 case 1: /* subnet mask */
136 clib_host_to_net_u32 (o->data_as_u32[0]);
137 c->subnet_mask_width = count_set_bits (subnet_mask);
140 case 3: /* router address */
142 u32 router_address = o->data_as_u32[0];
143 c->router_address.as_u32 = router_address;
147 case 12: /* hostname */
149 /* Replace the existing hostname if necessary */
150 vec_free (c->hostname);
151 vec_validate (c->hostname, o->length - 1);
152 clib_memcpy (c->hostname, o->data, o->length);
156 /* $$$$ Your message in this space, parse more options */
161 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
167 if (dhcp_message_type != DHCP_PACKET_OFFER)
169 clib_warning ("sw_if_index %d state %U message type %d",
170 c->sw_if_index, format_dhcp_client_state,
171 c->state, dhcp_message_type);
172 c->next_transmit = now + 5.0;
175 /* Received an offer, go send a request */
176 c->state = DHCP_REQUEST;
178 c->next_transmit = 0; /* send right now... */
179 /* Poke the client process, which will send the request */
180 vlib_process_signal_event (vm, dhcp_client_process_node.index,
181 EVENT_DHCP_CLIENT_WAKEUP, c - dcm->clients);
186 if (dhcp_message_type != DHCP_PACKET_ACK)
188 clib_warning ("sw_if_index %d state %U message type %d",
189 c->sw_if_index, format_dhcp_client_state,
190 c->state, dhcp_message_type);
191 c->next_transmit = now + 5.0;
194 /* OK, we own the address (etc), add to the routing table(s) */
195 if (c->state == DHCP_REQUEST)
197 void (*fp)(u32, u32, u8 *, u8, u8 *, u8 *, u8 *) = c->event_callback;
199 dhcp_client_acquire_address (dcm, c);
202 * Configure default IP route:
204 if (c->router_address.as_u32)
206 fib_prefix_t all_0s =
209 .fp_addr.ip4.as_u32 = 0x0,
210 .fp_proto = FIB_PROTOCOL_IP4,
214 .ip4 = c->router_address,
217 fib_table_entry_path_add (fib_table_get_index_for_sw_if_index(
228 NULL, // no label stack
229 FIB_ROUTE_PATH_FLAG_NONE);
233 * Call the user's event callback to report DHCP information
236 (*fp) (c->client_index, /* clinet index */
240 (u8 *)&c->leased_address, /* host IP address */
241 (u8 *)&c->router_address, /* router IP address */
242 (u8 *)(c->l2_rewrite + 6));/* host MAC address */
245 c->state = DHCP_BOUND;
247 c->next_transmit = now + (f64) c->lease_renewal_interval;
248 c->lease_expires = now + (f64) c->lease_lifetime;
252 clib_warning ("client %d bogus state %d",
253 c - dcm->clients, c->state);
257 /* drop the pkt, return 1 */
258 vlib_buffer_free (vm, &bi, 1);
263 send_dhcp_pkt (dhcp_client_main_t * dcm, dhcp_client_t * c,
264 dhcp_packet_type_t type, int is_broadcast)
266 vlib_main_t * vm = dcm->vlib_main;
267 vnet_main_t * vnm = dcm->vnet_main;
268 vnet_hw_interface_t * hw = vnet_get_sup_hw_interface (vnm, c->sw_if_index);
269 vnet_sw_interface_t * sup_sw
270 = vnet_get_sup_sw_interface (vnm, c->sw_if_index);
271 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, c->sw_if_index);
276 dhcp_header_t * dhcp;
280 u16 udp_length, ip_length;
282 /* Interface(s) down? */
283 if ((hw->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
285 if ((sup_sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
287 if ((sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
290 if (vlib_buffer_alloc (vm, &bi, 1) != 1) {
291 clib_warning ("buffer allocation failure");
292 c->next_transmit = 0;
296 /* Build a dhcpv4 pkt from whole cloth */
297 b = vlib_get_buffer (vm, bi);
299 ASSERT (b->current_data == 0);
301 vnet_buffer(b)->sw_if_index[VLIB_RX] = c->sw_if_index;
304 f = vlib_get_frame_to_node (vm, hw->output_node_index);
305 vnet_buffer(b)->sw_if_index[VLIB_TX] = c->sw_if_index;
306 clib_memcpy (b->data, c->l2_rewrite, vec_len(c->l2_rewrite));
308 (((u8 *)vlib_buffer_get_current (b)) + vec_len (c->l2_rewrite));
312 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
313 vnet_buffer(b)->sw_if_index[VLIB_TX] = ~0; /* use interface VRF */
314 ip = vlib_buffer_get_current (b);
317 /* Enqueue the packet right now */
318 to_next = vlib_frame_vector_args (f);
323 vlib_put_frame_to_node (vm, hw->output_node_index, f);
325 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
327 udp = (udp_header_t *)(ip+1);
328 dhcp = (dhcp_header_t *)(udp+1);
330 /* $$$ optimize, maybe */
331 memset (ip, 0, sizeof (*ip) + sizeof (*udp) + sizeof (*dhcp));
333 ip->ip_version_and_header_length = 0x45;
335 ip->protocol = IP_PROTOCOL_UDP;
339 /* src = 0.0.0.0, dst = 255.255.255.255 */
340 ip->dst_address.as_u32 = ~0;
344 /* Renewing an active lease, plain old ip4 src/dst */
345 ip->src_address.as_u32 = c->leased_address.as_u32;
346 ip->dst_address.as_u32 = c->dhcp_server.as_u32;
349 udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client);
350 udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server);
352 /* Send the interface MAC address */
353 clib_memcpy (dhcp->client_hardware_address, c->l2_rewrite + 6, 6);
355 /* Lease renewal, set up client_ip_address */
356 if (is_broadcast == 0)
357 dhcp->client_ip_address.as_u32 = c->leased_address.as_u32;
359 dhcp->opcode = 1; /* request, all we send */
360 dhcp->hardware_type = 1; /* ethernet */
361 dhcp->hardware_address_length = 6;
362 dhcp->transaction_identifier = c->transaction_id;
363 dhcp->flags = clib_host_to_net_u16(is_broadcast ? DHCP_FLAG_BROADCAST : 0);
364 dhcp->magic_cookie.as_u32 = DHCP_MAGIC;
366 o = (dhcp_option_t * )dhcp->options;
368 /* Send option 53, the DHCP message type */
369 o->option = DHCP_PACKET_OPTION_MSG_TYPE;
372 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
374 /* Send option 57, max msg length */
375 if (0 /* not needed, apparently */)
380 u16 *o2 = (u16 *) o->data;
381 *o2 = clib_host_to_net_u16 (1152);
382 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
387 * If server ip address is available with non-zero value,
388 * option 54 (DHCP Server Identifier) is sent.
390 if (c->dhcp_server.as_u32)
394 clib_memcpy (o->data, &c->dhcp_server.as_u32, 4);
395 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
398 /* send option 50, requested IP address */
399 if (c->leased_address.as_u32)
403 clib_memcpy (o->data, &c->leased_address.as_u32, 4);
404 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
407 /* send option 12, host name */
408 if (vec_len (c->hostname))
411 o->length = vec_len (c->hostname);
412 clib_memcpy (o->data, c->hostname, vec_len (c->hostname));
413 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
416 /* $$ maybe send the client s/w version if anyone cares */
419 * send option 55, parameter request list
420 * The current list - see below, matches the Linux dhcp client's list
421 * Any specific dhcp server config and/or dhcp server may or may
422 * not yield specific options.
425 o->length = vec_len (c->option_55_data);
426 clib_memcpy (o->data, c->option_55_data, vec_len(c->option_55_data));
427 o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
434 b->current_length = ((u8 *)o) - b->data;
436 /* fix ip length, checksum and udp length */
437 ip_length = vlib_buffer_length_in_chain (vm, b);
439 ip_length -= vec_len (c->l2_rewrite);
441 ip->length = clib_host_to_net_u16(ip_length);
442 ip->checksum = ip4_header_checksum(ip);
444 udp_length = ip_length - (sizeof (*ip));
445 udp->length = clib_host_to_net_u16 (udp_length);
449 dhcp_discover_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now)
452 * State machine "DISCOVER" state. Send a dhcp discover packet,
453 * eventually back off the retry rate.
455 send_dhcp_pkt (dcm, c, DHCP_PACKET_DISCOVER, 1 /* is_broadcast */);
458 if (c->retry_count > 10)
459 c->next_transmit = now + 5.0;
461 c->next_transmit = now + 1.0;
466 dhcp_request_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now)
469 * State machine "REQUEST" state. Send a dhcp request packet,
470 * eventually drop back to the discover state.
472 send_dhcp_pkt (dcm, c, DHCP_PACKET_REQUEST, 1 /* is_broadcast */);
475 if (c->retry_count > 7 /* lucky you */)
477 c->state = DHCP_DISCOVER;
478 c->next_transmit = now;
482 c->next_transmit = now + 1.0;
487 dhcp_bound_state (dhcp_client_main_t * dcm, dhcp_client_t * c, f64 now)
490 * State machine "BOUND" state. Send a dhcp request packet,
491 * eventually, when the lease expires, forget the dhcp data
492 * and go back to the stone age.
494 send_dhcp_pkt (dcm, c, DHCP_PACKET_REQUEST, 0 /* is_broadcast */);
497 if (c->retry_count > 10)
498 c->next_transmit = now + 5.0;
500 c->next_transmit = now + 1.0;
502 if (now > c->lease_expires)
504 if (c->router_address.as_u32)
506 fib_prefix_t all_0s =
509 .fp_addr.ip4.as_u32 = 0x0,
510 .fp_proto = FIB_PROTOCOL_IP4,
512 ip46_address_t nh = {
513 .ip4 = c->router_address,
516 fib_table_entry_path_remove(fib_table_get_index_for_sw_if_index(
526 FIB_ROUTE_PATH_FLAG_NONE);
529 dhcp_client_release_address (dcm, c);
530 c->state = DHCP_DISCOVER;
531 c->next_transmit = now;
533 /* Wipe out any memory of the address we had... */
534 c->leased_address.as_u32 = 0;
535 c->subnet_mask_width = 0;
536 c->router_address.as_u32 = 0;
537 c->lease_renewal_interval = 0;
538 c->dhcp_server.as_u32 = 0;
544 static f64 dhcp_client_sm (f64 now, f64 timeout, uword pool_index)
546 dhcp_client_main_t * dcm = &dhcp_client_main;
549 /* deleted, pooched, yadda yadda yadda */
550 if (pool_is_free_index (dcm->clients, pool_index))
553 c = pool_elt_at_index (dcm->clients, pool_index);
555 /* Time for us to do something with this client? */
556 if (now < c->next_transmit)
562 case DHCP_DISCOVER: /* send a discover */
563 if (dhcp_discover_state (dcm, c, now))
567 case DHCP_REQUEST: /* send a request */
568 if (dhcp_request_state (dcm, c, now))
572 case DHCP_BOUND: /* bound, renew needed? */
573 if (dhcp_bound_state (dcm, c, now))
578 clib_warning ("dhcp client %d bogus state %d",
579 c - dcm->clients, c->state);
583 if (c->next_transmit < now + timeout)
584 return c->next_transmit - now;
590 dhcp_client_process (vlib_main_t * vm,
591 vlib_node_runtime_t * rt,
597 uword * event_data = 0;
598 dhcp_client_main_t * dcm = &dhcp_client_main;
604 vlib_process_wait_for_event_or_clock (vm, timeout);
606 event_type = vlib_process_get_events (vm, &event_data);
608 now = vlib_time_now (vm);
612 case EVENT_DHCP_CLIENT_WAKEUP:
613 for (i = 0; i < vec_len (event_data); i++)
614 timeout = dhcp_client_sm (now, timeout, event_data[i]);
618 pool_foreach (c, dcm->clients,
620 timeout = dhcp_client_sm (now, timeout,
621 (uword)(c - dcm->clients));
623 if (pool_elts (dcm->clients) == 0)
628 vec_reset_length (event_data);
635 VLIB_REGISTER_NODE (dhcp_client_process_node,static) = {
636 .function = dhcp_client_process,
637 .type = VLIB_NODE_TYPE_PROCESS,
638 .name = "dhcp-client-process",
639 .process_log2_n_stack_bytes = 16,
642 static u8 * format_dhcp_client_state (u8 * s, va_list * va)
644 dhcp_client_state_t state = va_arg (*va, dhcp_client_state_t);
645 char * str = "BOGUS!";
653 foreach_dhcp_client_state;
659 s = format (s, "%s", str);
663 static u8 * format_dhcp_client (u8 * s, va_list * va)
665 dhcp_client_main_t * dcm = va_arg (*va, dhcp_client_main_t *);
666 dhcp_client_t * c = va_arg (*va, dhcp_client_t *);
667 int verbose = va_arg (*va, int);
669 s = format (s, "[%d] %U state %U ", c - dcm->clients,
670 format_vnet_sw_if_index_name, dcm->vnet_main, c->sw_if_index,
671 format_dhcp_client_state, c->state);
673 if (c->leased_address.as_u32)
674 s = format (s, "addr %U/%d gw %U\n",
675 format_ip4_address, &c->leased_address,
676 c->subnet_mask_width, format_ip4_address, &c->router_address);
678 s = format (s, "no address\n");
682 s = format (s, "retry count %d, next xmt %.2f",
683 c->retry_count, c->next_transmit);
688 static clib_error_t *
689 show_dhcp_client_command_fn (vlib_main_t * vm,
690 unformat_input_t * input,
691 vlib_cli_command_t * cmd)
693 dhcp_client_main_t * dcm = &dhcp_client_main;
696 u32 sw_if_index = ~0;
699 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
701 if (unformat (input, "intfc %U",
702 unformat_vnet_sw_interface, dcm->vnet_main,
705 else if (unformat (input, "verbose"))
711 if (sw_if_index != ~0)
713 p = hash_get (dcm->client_by_sw_if_index, sw_if_index);
715 return clib_error_return (0, "dhcp client not configured");
716 c = pool_elt_at_index (dcm->clients, p[0]);
717 vlib_cli_output (vm, "%U", format_dhcp_client, dcm, c, verbose);
721 pool_foreach (c, dcm->clients,
723 vlib_cli_output (vm, "%U", format_dhcp_client, dcm, c, verbose);
729 VLIB_CLI_COMMAND (show_dhcp_client_command, static) = {
730 .path = "show dhcp client",
731 .short_help = "show dhcp client [intfc <intfc>][verbose]",
732 .function = show_dhcp_client_command_fn,
736 int dhcp_client_add_del (dhcp_client_add_del_args_t * a)
738 dhcp_client_main_t * dcm = &dhcp_client_main;
739 vlib_main_t * vm = dcm->vlib_main;
742 fib_prefix_t all_1s =
745 .fp_addr.ip4.as_u32 = 0xffffffff,
746 .fp_proto = FIB_PROTOCOL_IP4,
748 fib_prefix_t all_0s =
751 .fp_addr.ip4.as_u32 = 0x0,
752 .fp_proto = FIB_PROTOCOL_IP4,
755 p = hash_get (dcm->client_by_sw_if_index, a->sw_if_index);
757 if ((p && a->is_add) || (!p && a->is_add == 0))
758 return VNET_API_ERROR_INVALID_VALUE;
762 pool_get (dcm->clients, c);
763 memset (c, 0, sizeof (*c));
764 c->state = DHCP_DISCOVER;
765 c->sw_if_index = a->sw_if_index;
766 c->client_index = a->client_index;
768 c->event_callback = a->event_callback;
769 c->option_55_data = a->option_55_data;
770 c->hostname = a->hostname;
771 c->client_identifier = a->client_identifier;
773 c->transaction_id = random_u32 (&dcm->seed);
774 } while (c->transaction_id == 0);
775 set_l2_rewrite (dcm, c);
776 hash_set (dcm->client_by_sw_if_index, a->sw_if_index, c - dcm->clients);
778 /* this add is ref counted by FIB so we can add for each itf */
779 fib_table_entry_special_add(fib_table_get_index_for_sw_if_index(
784 FIB_ENTRY_FLAG_LOCAL);
787 * enable the interface to RX IPv4 packets
788 * this is also ref counted
790 ip4_sw_interface_enable_disable (c->sw_if_index, 1);
792 vlib_process_signal_event (vm, dhcp_client_process_node.index,
793 EVENT_DHCP_CLIENT_WAKEUP, c - dcm->clients);
797 c = pool_elt_at_index (dcm->clients, p[0]);
799 fib_table_entry_special_remove(fib_table_get_index_for_sw_if_index(
805 if (c->router_address.as_u32)
807 ip46_address_t nh = {
808 .ip4 = c->router_address,
811 fib_table_entry_path_remove(fib_table_get_index_for_sw_if_index(
821 FIB_ROUTE_PATH_FLAG_NONE);
823 ip4_sw_interface_enable_disable (c->sw_if_index, 0);
825 vec_free (c->option_55_data);
826 vec_free (c->hostname);
827 vec_free (c->client_identifier);
828 vec_free (c->l2_rewrite);
829 hash_unset (dcm->client_by_sw_if_index, c->sw_if_index);
830 pool_put (dcm->clients, c);
836 dhcp_client_config (vlib_main_t * vm,
841 void * event_callback,
844 dhcp_client_add_del_args_t _a, *a = &_a;
847 memset (a, 0, sizeof (*a));
849 a->sw_if_index = sw_if_index;
850 a->client_index = client_index;
852 a->event_callback = event_callback;
853 vec_validate(a->hostname, strlen((char *)hostname) - 1);
854 strncpy((char *)a->hostname, (char *)hostname, vec_len(a->hostname));
855 a->client_identifier = format (0, "vpe 1.0%c", 0);
857 * Option 55 request list. These data precisely match
858 * the Ubuntu dhcp client. YMMV.
862 vec_add1 (a->option_55_data, 1);
863 /* Broadcast address */
864 vec_add1 (a->option_55_data, 28);
866 vec_add1 (a->option_55_data, 2);
868 vec_add1 (a->option_55_data, 3);
870 vec_add1 (a->option_55_data, 15);
872 vec_add1 (a->option_55_data, 6);
874 vec_add1 (a->option_55_data, 119);
876 vec_add1 (a->option_55_data, 12);
877 /* NetBIOS name server */
878 vec_add1 (a->option_55_data, 44);
880 vec_add1 (a->option_55_data, 47);
882 vec_add1 (a->option_55_data, 26);
883 /* Classless static route */
884 vec_add1 (a->option_55_data, 121);
886 vec_add1 (a->option_55_data, 42);
888 rv = dhcp_client_add_del (a);
895 case VNET_API_ERROR_INVALID_VALUE:
897 vec_free (a->hostname);
898 vec_free (a->client_identifier);
899 vec_free (a->option_55_data);
902 clib_warning ("dhcp client already enabled on intf_idx %d",
905 clib_warning ("dhcp client not enabled on on intf_idx %d",
910 clib_warning ("dhcp_client_add_del returned %d", rv);
916 static clib_error_t *
917 dhcp_client_set_command_fn (vlib_main_t * vm,
918 unformat_input_t * input,
919 vlib_cli_command_t * cmd)
922 dhcp_client_main_t * dcm = &dhcp_client_main;
925 u8 sw_if_index_set = 0;
927 dhcp_client_add_del_args_t _a, *a = &_a;
930 while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
932 if (unformat (input, "intfc %U",
933 unformat_vnet_sw_interface, dcm->vnet_main,
936 else if (unformat (input, "hostname %v", &hostname))
938 else if (unformat (input, "del"))
944 if (sw_if_index_set == 0)
945 return clib_error_return (0, "interface not specified");
947 memset (a, 0, sizeof (*a));
949 a->sw_if_index = sw_if_index;
950 a->hostname = hostname;
951 a->client_identifier = format (0, "vpe 1.0%c", 0);
954 * Option 55 request list. These data precisely match
955 * the Ubuntu dhcp client. YMMV.
959 vec_add1 (a->option_55_data, 1);
960 /* Broadcast address */
961 vec_add1 (a->option_55_data, 28);
963 vec_add1 (a->option_55_data, 2);
965 vec_add1 (a->option_55_data, 3);
967 vec_add1 (a->option_55_data, 15);
969 vec_add1 (a->option_55_data, 6);
971 vec_add1 (a->option_55_data, 119);
973 vec_add1 (a->option_55_data, 12);
974 /* NetBIOS name server */
975 vec_add1 (a->option_55_data, 44);
977 vec_add1 (a->option_55_data, 47);
979 vec_add1 (a->option_55_data, 26);
980 /* Classless static route */
981 vec_add1 (a->option_55_data, 121);
983 vec_add1 (a->option_55_data, 42);
985 rv = dhcp_client_add_del (a);
992 case VNET_API_ERROR_INVALID_VALUE:
994 vec_free (a->hostname);
995 vec_free (a->client_identifier);
996 vec_free (a->option_55_data);
998 return clib_error_return (0, "dhcp client already enabled on %U",
999 format_vnet_sw_if_index_name,
1000 dcm->vnet_main, sw_if_index);
1002 return clib_error_return (0, "dhcp client not enabled on %U",
1003 format_vnet_sw_if_index_name,
1004 dcm->vnet_main, sw_if_index);
1008 vlib_cli_output (vm, "dhcp_client_add_del returned %d", rv);
1014 VLIB_CLI_COMMAND (dhcp_client_set_command, static) = {
1015 .path = "set dhcp client",
1016 .short_help = "set dhcp client [del] intfc <interface> [hostname <name>]",
1017 .function = dhcp_client_set_command_fn,
1020 static clib_error_t *
1021 dhcp_client_init (vlib_main_t * vm)
1023 dhcp_client_main_t * dcm = &dhcp_client_main;
1025 dcm->vlib_main = vm;
1026 dcm->vnet_main = vnet_get_main();
1027 dcm->seed = 0xdeaddabe;
1031 VLIB_INIT_FUNCTION (dhcp_client_init);