2 * Copyright (c) 2018 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.
16 #include <vlib/vlib.h>
17 #include <dhcp/dhcp6_packet.h>
18 #include <dhcp/dhcp_proxy.h>
19 #include <vnet/mfib/mfib_table.h>
20 #include <vnet/mfib/ip6_mfib.h>
21 #include <vnet/fib/fib.h>
22 #include <vnet/adj/adj_mcast.h>
23 #include <vnet/ip/ip6_link.h>
24 #include <dhcp/dhcp6_ia_na_client_dp.h>
25 #include <dhcp/dhcp6_client_common_dp.h>
26 #include <vnet/ip/ip_types_api.h>
28 dhcp6_ia_na_client_main_t dhcp6_ia_na_client_main;
29 dhcp6_ia_na_client_public_main_t dhcp6_ia_na_client_public_main;
32 signal_report (address_report_t * r)
34 vlib_main_t *vm = vlib_get_main ();
35 dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
36 uword ni = cm->publisher_node;
37 uword et = cm->publisher_et;
39 if (ni == (uword) ~ 0)
42 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
48 dhcp6_publish_report (address_report_t * r)
50 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
51 vl_api_rpc_call_main_thread (signal_report, (u8 *) r, sizeof *r);
56 dhcp6_set_publisher_node (uword node_index, uword event_type)
58 dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
59 cm->publisher_node = node_index;
60 cm->publisher_et = event_type;
64 stop_sending_client_message (vlib_main_t * vm,
65 dhcp6_ia_na_client_state_t * client_state)
69 client_state->keep_sending_client_message = 0;
70 vec_free (client_state->params.addresses);
71 if (client_state->buffer)
73 bi0 = vlib_get_buffer_index (vm, client_state->buffer);
74 vlib_buffer_free (vm, &bi0, 1);
75 client_state->buffer = 0;
76 adj_unlock (client_state->adj_index);
77 client_state->adj_index = ~0;
81 static vlib_buffer_t *
82 create_buffer_for_client_message (vlib_main_t * vm, u32 sw_if_index,
83 dhcp6_ia_na_client_state_t * client_state,
86 dhcp6_client_common_main_t *ccm = &dhcp6_client_common_main;
91 dhcpv6_header_t *dhcp;
92 const ip6_address_t *src_addr;
94 client_state->transaction_start = vlib_time_now (vm);
98 /* Get a link-local address */
99 src_addr = ip6_get_link_local_address (sw_if_index);
101 if (src_addr->as_u8[0] != 0xfe)
103 clib_warning ("Could not find source address to send DHCPv6 packet");
107 if (vlib_buffer_alloc (vm, &bi, 1) != 1)
109 clib_warning ("Buffer allocation failed");
113 b = vlib_get_buffer (vm, bi);
114 vnet_buffer (b)->sw_if_index[VLIB_RX] = sw_if_index;
115 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
116 client_state->adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
119 vnet_buffer (b)->ip.adj_index[VLIB_TX] = client_state->adj_index;
120 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
122 ip = (ip6_header_t *) vlib_buffer_get_current (b);
123 udp = (udp_header_t *) (ip + 1);
124 dhcp = (dhcpv6_header_t *) (udp + 1);
126 ip->src_address = *src_addr;
128 ip->ip_version_traffic_class_and_flow_label =
129 clib_host_to_net_u32 (0x6 << 28);
130 ip->payload_length = 0;
131 ip->protocol = IP_PROTOCOL_UDP;
133 udp->src_port = clib_host_to_net_u16 (DHCPV6_CLIENT_PORT);
134 udp->dst_port = clib_host_to_net_u16 (DHCPV6_SERVER_PORT);
138 dhcp->msg_type = type;
139 dhcp->xid[0] = (client_state->transaction_id & 0x00ff0000) >> 16;
140 dhcp->xid[1] = (client_state->transaction_id & 0x0000ff00) >> 8;
141 dhcp->xid[2] = (client_state->transaction_id & 0x000000ff) >> 0;
143 void *d = (void *) dhcp->data;
144 dhcpv6_option_t *duid;
145 dhcpv6_elapsed_t *elapsed;
146 dhcpv6_ia_header_t *ia_hdr;
147 dhcpv6_ia_opt_addr_t *opt_addr;
148 if (type == DHCPV6_MSG_SOLICIT || type == DHCPV6_MSG_REQUEST ||
149 type == DHCPV6_MSG_RENEW || type == DHCPV6_MSG_REBIND ||
150 type == DHCPV6_MSG_RELEASE)
152 duid = (dhcpv6_option_t *) d;
153 duid->option = clib_host_to_net_u16 (DHCPV6_OPTION_CLIENTID);
154 duid->length = clib_host_to_net_u16 (CLIENT_DUID_LENGTH);
155 clib_memcpy (duid + 1, client_duid.bin_string, CLIENT_DUID_LENGTH);
156 d += sizeof (*duid) + CLIENT_DUID_LENGTH;
158 if (client_state->params.server_index != ~0)
161 &ccm->server_ids[client_state->params.server_index];
163 duid = (dhcpv6_option_t *) d;
164 duid->option = clib_host_to_net_u16 (DHCPV6_OPTION_SERVERID);
165 duid->length = clib_host_to_net_u16 (se->len);
166 clib_memcpy (duid + 1, se->data, se->len);
167 d += sizeof (*duid) + se->len;
170 elapsed = (dhcpv6_elapsed_t *) d;
171 elapsed->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_ELAPSED_TIME);
172 elapsed->opt.length =
173 clib_host_to_net_u16 (sizeof (*elapsed) - sizeof (elapsed->opt));
174 elapsed->elapsed_10ms = 0;
175 client_state->elapsed_pos =
176 (char *) &elapsed->elapsed_10ms -
177 (char *) vlib_buffer_get_current (b);
178 d += sizeof (*elapsed);
180 ia_hdr = (dhcpv6_ia_header_t *) d;
181 ia_hdr->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_IA_NA);
182 ia_hdr->iaid = clib_host_to_net_u32 (DHCPV6_CLIENT_IAID);
183 ia_hdr->t1 = clib_host_to_net_u32 (client_state->params.T1);
184 ia_hdr->t2 = clib_host_to_net_u32 (client_state->params.T2);
185 d += sizeof (*ia_hdr);
187 n_addresses = vec_len (client_state->params.addresses);
190 clib_host_to_net_u16 (sizeof (*ia_hdr) +
191 n_addresses * sizeof (*opt_addr) -
192 sizeof (ia_hdr->opt));
194 for (i = 0; i < n_addresses; i++)
196 dhcp6_send_client_message_params_address_t *addr =
197 &client_state->params.addresses[i];
198 opt_addr = (dhcpv6_ia_opt_addr_t *) d;
199 opt_addr->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_IAADDR);
200 opt_addr->opt.length =
201 clib_host_to_net_u16 (sizeof (*opt_addr) -
202 sizeof (opt_addr->opt));
203 opt_addr->addr = addr->address;
204 opt_addr->valid = clib_host_to_net_u32 (addr->valid_lt);
205 opt_addr->preferred = clib_host_to_net_u32 (addr->preferred_lt);
206 d += sizeof (*opt_addr);
211 clib_warning ("State not implemented");
214 dhcp_opt_len = ((u8 *) d) - dhcp->data;
216 clib_host_to_net_u16 (sizeof (*udp) + sizeof (*dhcp) + dhcp_opt_len);
217 ip->payload_length = udp->length;
219 sizeof (*ip) + sizeof (*udp) + sizeof (*dhcp) + dhcp_opt_len;
221 ip->dst_address = all_dhcp6_relay_agents_and_servers;
227 check_send_client_message (vlib_main_t * vm,
228 dhcp6_ia_na_client_state_t * client_state,
229 f64 current_time, f64 * due_time)
239 int bogus_length = 0;
241 dhcp6_send_client_message_params_t *params;
243 f64 now = vlib_time_now (vm);
245 if (!client_state->keep_sending_client_message)
248 params = &client_state->params;
250 if (client_state->due_time > current_time)
252 *due_time = client_state->due_time;
256 p0 = client_state->buffer;
258 next_index = ip6_rewrite_mcast_node.index;
260 c0 = vlib_buffer_copy (vm, p0);
262 return client_state->keep_sending_client_message;
264 ci0 = vlib_get_buffer_index (vm, c0);
266 ip = (ip6_header_t *) vlib_buffer_get_current (c0);
267 udp = (udp_header_t *) (ip + 1);
269 u16 *elapsed_field = (u16 *) ((void *) ip + client_state->elapsed_pos);
271 clib_host_to_net_u16 ((u16)
272 ((now - client_state->transaction_start) * 100));
276 ip6_tcp_udp_icmp_compute_checksum (vm, 0, ip, &bogus_length);
278 f = vlib_get_frame_to_node (vm, next_index);
279 to_next = vlib_frame_vector_args (f);
282 vlib_put_frame_to_node (vm, next_index, f);
284 if (params->mrc != 0 && --client_state->n_left == 0)
285 stop_sending_client_message (vm, client_state);
288 client_state->sleep_interval =
289 (2 + random_f64_from_to (-0.1, 0.1)) * client_state->sleep_interval;
290 if (client_state->sleep_interval > params->mrt)
291 client_state->sleep_interval =
292 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
294 client_state->due_time = current_time + client_state->sleep_interval;
297 && current_time > client_state->start_time + params->mrd)
298 stop_sending_client_message (vm, client_state);
300 *due_time = client_state->due_time;
303 return client_state->keep_sending_client_message;
307 send_dhcp6_client_message_process (vlib_main_t * vm,
308 vlib_node_runtime_t * rt,
311 dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
312 dhcp6_ia_na_client_state_t *client_state;
313 uword *event_data = 0;
314 f64 sleep_time = 1e9;
322 vlib_process_wait_for_event_or_clock (vm, sleep_time);
323 vlib_process_get_events (vm, &event_data);
324 vec_reset_length (event_data);
326 current_time = vlib_time_now (vm);
329 due_time = current_time + 1e9;
330 for (i = 0; i < vec_len (cm->client_state_by_sw_if_index); i++)
332 client_state = &cm->client_state_by_sw_if_index[i];
333 if (!client_state->entry_valid)
335 if (check_send_client_message
336 (vm, client_state, current_time, &dt) && (dt < due_time))
339 current_time = vlib_time_now (vm);
341 while (due_time < current_time);
343 sleep_time = due_time - current_time;
350 VLIB_REGISTER_NODE (send_dhcp6_client_message_process_node, static) = {
351 .function = send_dhcp6_client_message_process,
352 .type = VLIB_NODE_TYPE_PROCESS,
353 .name = "send-dhcp6-client-message-process",
358 dhcp6_send_client_message (vlib_main_t * vm, u32 sw_if_index, u8 stop,
359 dhcp6_send_client_message_params_t * params)
361 dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
362 dhcp6_ia_na_client_state_t *client_state = 0;
363 dhcp6_ia_na_client_state_t empty_state = { 0, };
365 ASSERT (~0 != sw_if_index);
367 vec_validate_init_empty (cm->client_state_by_sw_if_index, sw_if_index,
369 client_state = &cm->client_state_by_sw_if_index[sw_if_index];
370 if (!client_state->entry_valid)
372 client_state->entry_valid = 1;
373 client_state->adj_index = ~0;
376 stop_sending_client_message (vm, client_state);
380 client_state->keep_sending_client_message = 1;
381 vec_free (client_state->params.addresses);
382 client_state->params = *params;
383 client_state->params.addresses = vec_dup (params->addresses);
384 client_state->n_left = params->mrc;
385 client_state->start_time = vlib_time_now (vm);
386 client_state->sleep_interval =
387 (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
388 client_state->due_time = 0; /* send first packet ASAP */
389 client_state->transaction_id = random_u32 (&cm->seed) & 0x00ffffff;
390 client_state->buffer =
391 create_buffer_for_client_message (vm, sw_if_index, client_state,
393 if (!client_state->buffer)
394 client_state->keep_sending_client_message = 0;
396 vlib_process_signal_event (vm,
397 send_dhcp6_client_message_process_node.index,
402 static clib_error_t *
403 dhcp6_client_init (vlib_main_t * vm)
405 dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
408 cm->vnet_main = vnet_get_main ();
410 cm->publisher_node = ~0;
412 cm->seed = 0xdeaccabe;
417 VLIB_INIT_FUNCTION (dhcp6_client_init);
420 * fd.io coding-style-patch-verification: ON
423 * eval: (c-set-style "gnu")