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c68d2a87 TL |
1 | /* failover.c |
2 | ||
3 | Failover protocol support code... */ | |
4 | ||
5 | /* | |
54bdf6c7 | 6 | * Copyright (c) 1999-2001 Internet Software Consortium. |
49733f31 | 7 | * All rights reserved. |
c68d2a87 | 8 | * |
49733f31 TL |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
c68d2a87 | 12 | * |
49733f31 TL |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. Neither the name of The Internet Software Consortium nor the names | |
19 | * of its contributors may be used to endorse or promote products derived | |
20 | * from this software without specific prior written permission. | |
c68d2a87 | 21 | * |
49733f31 TL |
22 | * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND |
23 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, | |
24 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR | |
27 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
28 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
29 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
30 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
31 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
32 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
33 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | * | |
36 | * This software has been written for the Internet Software Consortium | |
37 | * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc. | |
38 | * To learn more about the Internet Software Consortium, see | |
39 | * ``http://www.isc.org/''. To learn more about Vixie Enterprises, | |
40 | * see ``http://www.vix.com''. To learn more about Nominum, Inc., see | |
41 | * ``http://www.nominum.com''. | |
c68d2a87 TL |
42 | */ |
43 | ||
44 | #ifndef lint | |
45 | static char copyright[] = | |
a609e69b | 46 | "$Id: failover.c,v 1.57 2001/08/10 10:50:49 mellon Exp $ Copyright (c) 1999-2001 The Internet Software Consortium. All rights reserved.\n"; |
c68d2a87 TL |
47 | #endif /* not lint */ |
48 | ||
49 | #include "dhcpd.h" | |
d8a417b2 | 50 | #include "version.h" |
d9eefc5d | 51 | #include <omapip/omapip_p.h> |
c68d2a87 TL |
52 | |
53 | #if defined (FAILOVER_PROTOCOL) | |
54 | static struct hash_table *failover_hash; | |
d758ad8c | 55 | dhcp_failover_state_t *failover_states; |
d9eefc5d | 56 | static isc_result_t do_a_failover_option (omapi_object_t *, |
d50d0b82 | 57 | dhcp_failover_link_t *); |
02ca1b45 | 58 | dhcp_failover_listener_t *failover_listeners; |
c68d2a87 | 59 | |
988c1ca7 DN |
60 | static isc_result_t failover_message_reference (failover_message_t **, |
61 | failover_message_t *, | |
62 | const char *file, int line); | |
63 | static isc_result_t failover_message_dereference (failover_message_t **, | |
64 | const char *file, int line); | |
65 | ||
85a53735 TL |
66 | void dhcp_failover_startup () |
67 | { | |
68 | dhcp_failover_state_t *state; | |
69 | isc_result_t status; | |
02ca1b45 | 70 | dhcp_failover_listener_t *l; |
85a53735 TL |
71 | |
72 | for (state = failover_states; state; state = state -> next) { | |
9f3da356 | 73 | dhcp_failover_state_transition (state, "startup"); |
02ca1b45 | 74 | |
a609e69b TL |
75 | if (state -> pool_count == 0) { |
76 | log_error ("failover peer declaration with no %s", | |
77 | "referring pools."); | |
78 | log_error ("In order to use failover, you MUST %s", | |
79 | "refer to your main failover declaration"); | |
80 | log_error ("in each pool declaration. You MUST %s", | |
81 | "NOT use range declarations outside"); | |
82 | log_fatal ("of pool declarations."); | |
83 | } | |
02ca1b45 TL |
84 | /* In case the peer is already running, immediately try |
85 | to establish a connection with it. */ | |
8998f8df TL |
86 | status = dhcp_failover_link_initiate ((omapi_object_t *)state); |
87 | if (status != ISC_R_SUCCESS && status != ISC_R_INCOMPLETE) { | |
0db87765 TL |
88 | #if defined (DEBUG_FAILOVER_TIMING) |
89 | log_info ("add_timeout +90 dhcp_failover_reconnect"); | |
90 | #endif | |
02ca1b45 TL |
91 | add_timeout (cur_time + 90, |
92 | dhcp_failover_reconnect, state, | |
93 | (tvref_t) | |
94 | dhcp_failover_state_reference, | |
95 | (tvunref_t) | |
96 | dhcp_failover_state_dereference); | |
85a53735 TL |
97 | log_error ("failover peer %s: %s", state -> name, |
98 | isc_result_totext (status)); | |
99 | } | |
02ca1b45 TL |
100 | |
101 | status = (dhcp_failover_listen | |
102 | ((omapi_object_t *)state)); | |
103 | if (status != ISC_R_SUCCESS) { | |
0db87765 TL |
104 | #if defined (DEBUG_FAILOVER_TIMING) |
105 | log_info ("add_timeout +90 %s", | |
106 | "dhcp_failover_listener_restart"); | |
107 | #endif | |
02ca1b45 TL |
108 | add_timeout (cur_time + 90, |
109 | dhcp_failover_listener_restart, | |
110 | state, | |
111 | (tvref_t)omapi_object_reference, | |
112 | (tvunref_t)omapi_object_dereference); | |
113 | } | |
85a53735 TL |
114 | } |
115 | } | |
116 | ||
d758ad8c | 117 | int dhcp_failover_write_all_states () |
9f3da356 TL |
118 | { |
119 | dhcp_failover_state_t *state; | |
120 | ||
121 | for (state = failover_states; state; state = state -> next) { | |
d758ad8c TL |
122 | if (!write_failover_state (state)) |
123 | return 0; | |
9f3da356 | 124 | } |
d758ad8c | 125 | return 1; |
9f3da356 TL |
126 | } |
127 | ||
85a53735 | 128 | isc_result_t enter_failover_peer (peer) |
dd53dc5a | 129 | dhcp_failover_state_t *peer; |
c68d2a87 | 130 | { |
85a53735 TL |
131 | dhcp_failover_state_t *dup = (dhcp_failover_state_t *)0; |
132 | isc_result_t status; | |
133 | ||
20916cae | 134 | status = find_failover_peer (&dup, peer -> name, MDL); |
85a53735 TL |
135 | if (status == ISC_R_NOTFOUND) { |
136 | if (failover_states) { | |
20916cae TL |
137 | dhcp_failover_state_reference (&peer -> next, |
138 | failover_states, MDL); | |
139 | dhcp_failover_state_dereference (&failover_states, | |
140 | MDL); | |
85a53735 | 141 | } |
20916cae | 142 | dhcp_failover_state_reference (&failover_states, peer, MDL); |
85a53735 TL |
143 | return ISC_R_SUCCESS; |
144 | } | |
20916cae | 145 | dhcp_failover_state_dereference (&dup, MDL); |
85a53735 TL |
146 | if (status == ISC_R_SUCCESS) |
147 | return ISC_R_EXISTS; | |
85a53735 | 148 | return status; |
c68d2a87 TL |
149 | } |
150 | ||
20916cae | 151 | isc_result_t find_failover_peer (peer, name, file, line) |
dd53dc5a | 152 | dhcp_failover_state_t **peer; |
85a53735 | 153 | const char *name; |
20916cae TL |
154 | const char *file; |
155 | int line; | |
c68d2a87 | 156 | { |
dd53dc5a | 157 | dhcp_failover_state_t *p; |
c68d2a87 | 158 | |
dd53dc5a TL |
159 | for (p = failover_states; p; p = p -> next) |
160 | if (!strcmp (name, p -> name)) | |
161 | break; | |
162 | if (p) | |
20916cae | 163 | return dhcp_failover_state_reference (peer, p, file, line); |
dd53dc5a | 164 | return ISC_R_NOTFOUND; |
c68d2a87 TL |
165 | } |
166 | ||
d50d0b82 TL |
167 | /* The failover protocol has three objects associated with it. For |
168 | each failover partner declaration in the dhcpd.conf file, primary | |
169 | or secondary, there is a failover_state object. For any primary or | |
170 | secondary state object that has a connection to its peer, there is | |
171 | also a failover_link object, which has its own input state seperate | |
172 | from the failover protocol state for managing the actual bytes | |
173 | coming in off the wire. Finally, there will be one listener object | |
174 | for every distinct port number associated with a secondary | |
175 | failover_state object. Normally all secondary failover_state | |
176 | objects are expected to listen on the same port number, so there | |
177 | need be only one listener object, but if different port numbers are | |
178 | specified for each failover object, there could be as many as one | |
179 | listener object for each secondary failover_state object. */ | |
180 | ||
181 | /* This, then, is the implemention of the failover link object. */ | |
182 | ||
183 | isc_result_t dhcp_failover_link_initiate (omapi_object_t *h) | |
184 | { | |
185 | isc_result_t status; | |
186 | dhcp_failover_link_t *obj; | |
d9eefc5d | 187 | omapi_value_t *value = (omapi_value_t *)0; |
dd53dc5a TL |
188 | dhcp_failover_state_t *state; |
189 | omapi_object_t *o; | |
190 | int i; | |
191 | struct data_string ds; | |
85a53735 TL |
192 | omapi_addr_list_t *addrs = (omapi_addr_list_t *)0; |
193 | omapi_addr_t local_addr; | |
d50d0b82 | 194 | |
dd53dc5a TL |
195 | /* Find the failover state in the object chain. */ |
196 | for (o = h; o -> outer; o = o -> outer) | |
197 | ; | |
198 | for (; o; o = o -> inner) { | |
199 | if (o -> type == dhcp_type_failover_state) | |
200 | break; | |
d9eefc5d | 201 | } |
dd53dc5a | 202 | if (!o) |
d50d0b82 | 203 | return ISC_R_INVALIDARG; |
dd53dc5a | 204 | state = (dhcp_failover_state_t *)o; |
d50d0b82 | 205 | |
20916cae TL |
206 | obj = (dhcp_failover_link_t *)0; |
207 | status = dhcp_failover_link_allocate (&obj, MDL); | |
208 | if (status != ISC_R_SUCCESS) | |
209 | return status; | |
02ca1b45 TL |
210 | option_cache_reference (&obj -> peer_address, |
211 | state -> partner.address, MDL); | |
212 | obj -> peer_port = state -> partner.port; | |
20916cae | 213 | dhcp_failover_state_reference (&obj -> state_object, state, MDL); |
dd53dc5a TL |
214 | |
215 | memset (&ds, 0, sizeof ds); | |
216 | if (!evaluate_option_cache (&ds, (struct packet *)0, (struct lease *)0, | |
9e383163 | 217 | (struct client_state *)0, |
dd53dc5a TL |
218 | (struct option_state *)0, |
219 | (struct option_state *)0, | |
4bd8800e | 220 | &global_scope, obj -> peer_address, MDL)) { |
20916cae | 221 | dhcp_failover_link_dereference (&obj, MDL); |
dd53dc5a | 222 | return ISC_R_UNEXPECTED; |
d50d0b82 | 223 | } |
dd53dc5a | 224 | |
85a53735 TL |
225 | /* Make an omapi address list out of a buffer containing zero or more |
226 | IPv4 addresses. */ | |
227 | status = omapi_addr_list_new (&addrs, ds.len / 4, MDL); | |
228 | if (status != ISC_R_SUCCESS) { | |
20916cae | 229 | dhcp_failover_link_dereference (&obj, MDL); |
85a53735 TL |
230 | return status; |
231 | } | |
232 | ||
233 | for (i = 0; i < addrs -> count; i++) { | |
234 | addrs -> addresses [i].addrtype = AF_INET; | |
235 | addrs -> addresses [i].addrlen = sizeof (struct in_addr); | |
236 | memcpy (addrs -> addresses [i].address, | |
237 | &ds.data [i * 4], sizeof (struct in_addr)); | |
238 | addrs -> addresses [i].port = obj -> peer_port; | |
dd53dc5a | 239 | } |
4bd8800e | 240 | data_string_forget (&ds, MDL); |
dd53dc5a | 241 | |
85a53735 | 242 | /* Now figure out the local address that we're supposed to use. */ |
de8dfadf TL |
243 | if (!state -> me.address || |
244 | !evaluate_option_cache (&ds, (struct packet *)0, | |
245 | (struct lease *)0, | |
9e383163 | 246 | (struct client_state *)0, |
85a53735 TL |
247 | (struct option_state *)0, |
248 | (struct option_state *)0, | |
02ca1b45 | 249 | &global_scope, state -> me.address, |
85a53735 TL |
250 | MDL)) { |
251 | memset (&local_addr, 0, sizeof local_addr); | |
252 | local_addr.addrtype = AF_INET; | |
253 | local_addr.addrlen = sizeof (struct in_addr); | |
9f3da356 | 254 | if (!state -> server_identifier.len) { |
a609e69b | 255 | log_fatal ("failover peer %s: no local address.", |
9f3da356 TL |
256 | state -> name); |
257 | } | |
85a53735 TL |
258 | } else { |
259 | if (ds.len != sizeof (struct in_addr)) { | |
260 | data_string_forget (&ds, MDL); | |
20916cae | 261 | dhcp_failover_link_dereference (&obj, MDL); |
85a53735 TL |
262 | omapi_addr_list_dereference (&addrs, MDL); |
263 | return ISC_R_INVALIDARG; | |
264 | } | |
265 | local_addr.addrtype = AF_INET; | |
266 | local_addr.addrlen = ds.len; | |
267 | memcpy (local_addr.address, ds.data, ds.len); | |
9f3da356 TL |
268 | if (!state -> server_identifier.len) |
269 | data_string_copy (&state -> server_identifier, | |
270 | &ds, MDL); | |
85a53735 | 271 | data_string_forget (&ds, MDL); |
9f3da356 | 272 | local_addr.port = 0; /* Let the O.S. choose. */ |
85a53735 TL |
273 | } |
274 | ||
275 | status = omapi_connect_list ((omapi_object_t *)obj, | |
276 | addrs, &local_addr); | |
277 | omapi_addr_list_dereference (&addrs, MDL); | |
278 | ||
20916cae TL |
279 | dhcp_failover_link_dereference (&obj, MDL); |
280 | return status; | |
d50d0b82 TL |
281 | } |
282 | ||
283 | isc_result_t dhcp_failover_link_signal (omapi_object_t *h, | |
284 | const char *name, va_list ap) | |
285 | { | |
286 | isc_result_t status; | |
287 | dhcp_failover_link_t *link; | |
288 | omapi_object_t *c; | |
289 | u_int16_t nlen; | |
290 | u_int32_t vlen; | |
9f3da356 | 291 | dhcp_failover_state_t *s, *state = (dhcp_failover_state_t *)0; |
d50d0b82 TL |
292 | |
293 | if (h -> type != dhcp_type_failover_link) { | |
294 | /* XXX shouldn't happen. Put an assert here? */ | |
295 | return ISC_R_UNEXPECTED; | |
296 | } | |
297 | link = (dhcp_failover_link_t *)h; | |
298 | ||
85a53735 | 299 | if (!strcmp (name, "connect")) { |
02ca1b45 | 300 | if (link -> state_object -> i_am == primary) { |
85a53735 | 301 | status = dhcp_failover_send_connect (h); |
02ca1b45 TL |
302 | if (status != ISC_R_SUCCESS) { |
303 | log_info ("dhcp_failover_send_connect: %s", | |
304 | isc_result_totext (status)); | |
305 | omapi_disconnect (h -> outer, 1); | |
306 | } | |
da292833 TL |
307 | } else |
308 | status = ISC_R_SUCCESS; | |
309 | /* Allow the peer fifteen seconds to send us a | |
310 | startup message. */ | |
0db87765 TL |
311 | #if defined (DEBUG_FAILOVER_TIMING) |
312 | log_info ("add_timeout +15 %s", | |
313 | "dhcp_failover_link_startup_timeout"); | |
314 | #endif | |
da292833 TL |
315 | add_timeout (cur_time + 15, |
316 | dhcp_failover_link_startup_timeout, | |
317 | link, | |
318 | (tvref_t)dhcp_failover_link_reference, | |
319 | (tvunref_t)dhcp_failover_link_dereference); | |
320 | return status; | |
85a53735 TL |
321 | } |
322 | ||
9f3da356 | 323 | if (!strcmp (name, "disconnect")) { |
da292833 | 324 | if (link -> state_object) { |
db6960a7 TL |
325 | dhcp_failover_state_reference (&state, |
326 | link -> state_object, MDL); | |
e651f9b2 | 327 | link -> state = dhcp_flink_disconnected; |
db6960a7 | 328 | |
e651f9b2 | 329 | /* Make the transition. */ |
da292833 | 330 | if (state -> link_to_peer == link) { |
01c6e68a TL |
331 | dhcp_failover_state_transition (link -> state_object, |
332 | name); | |
db6960a7 | 333 | |
da292833 | 334 | /* Start trying to reconnect. */ |
0db87765 TL |
335 | #if defined (DEBUG_FAILOVER_TIMING) |
336 | log_info ("add_timeout +5 %s", | |
337 | "dhcp_failover_reconnect"); | |
338 | #endif | |
da292833 TL |
339 | add_timeout (cur_time + 5, dhcp_failover_reconnect, |
340 | state, | |
341 | (tvref_t)dhcp_failover_state_reference, | |
342 | (tvunref_t)dhcp_failover_state_dereference); | |
343 | } | |
380da6c0 | 344 | dhcp_failover_state_dereference (&state, MDL); |
e651f9b2 TL |
345 | } |
346 | return ISC_R_SUCCESS; | |
9f3da356 TL |
347 | } |
348 | ||
d50d0b82 TL |
349 | /* Not a signal we recognize? */ |
350 | if (strcmp (name, "ready")) { | |
d9eefc5d | 351 | if (h -> inner && h -> inner -> type -> signal_handler) |
9f3da356 TL |
352 | return (*(h -> inner -> type -> signal_handler)) |
353 | (h -> inner, name, ap); | |
d50d0b82 TL |
354 | return ISC_R_NOTFOUND; |
355 | } | |
356 | ||
d9eefc5d | 357 | if (!h -> outer || h -> outer -> type != omapi_type_connection) |
d50d0b82 | 358 | return ISC_R_INVALIDARG; |
d9eefc5d | 359 | c = h -> outer; |
d50d0b82 TL |
360 | |
361 | /* We get here because we requested that we be woken up after | |
362 | some number of bytes were read, and that number of bytes | |
363 | has in fact been read. */ | |
d9eefc5d | 364 | switch (link -> state) { |
d50d0b82 | 365 | case dhcp_flink_start: |
d9eefc5d | 366 | link -> state = dhcp_flink_message_length_wait; |
d50d0b82 TL |
367 | if ((omapi_connection_require (c, 2)) != ISC_R_SUCCESS) |
368 | break; | |
369 | case dhcp_flink_message_length_wait: | |
25a69ca1 | 370 | next_message: |
d9eefc5d | 371 | link -> state = dhcp_flink_message_wait; |
4bd8800e | 372 | link -> imsg = dmalloc (sizeof (failover_message_t), MDL); |
d9eefc5d | 373 | if (!link -> imsg) { |
988c1ca7 | 374 | status = ISC_R_NOMEMORY; |
d50d0b82 | 375 | dhcp_flink_fail: |
d9eefc5d | 376 | if (link -> imsg) { |
988c1ca7 DN |
377 | failover_message_dereference (&link->imsg, |
378 | MDL); | |
d9eefc5d | 379 | } |
d50d0b82 | 380 | link -> state = dhcp_flink_disconnected; |
988c1ca7 DN |
381 | log_info ("message length wait: %s", |
382 | isc_result_totext (status)); | |
d50d0b82 TL |
383 | omapi_disconnect (c, 1); |
384 | /* XXX just blow away the protocol state now? | |
385 | XXX or will disconnect blow it away? */ | |
386 | return ISC_R_UNEXPECTED; | |
387 | } | |
25a69ca1 | 388 | memset (link -> imsg, 0, sizeof (failover_message_t)); |
fa0b4709 | 389 | link -> imsg -> refcnt = 1; |
d9eefc5d TL |
390 | /* Get the length: */ |
391 | omapi_connection_get_uint16 (c, &link -> imsg_len); | |
392 | link -> imsg_count = 0; /* Bytes read. */ | |
393 | ||
394 | /* Maximum of 2048 bytes in any failover message. */ | |
988c1ca7 DN |
395 | if (link -> imsg_len > DHCP_FAILOVER_MAX_MESSAGE_SIZE) { |
396 | status = ISC_R_UNEXPECTED; | |
d9eefc5d | 397 | goto dhcp_flink_fail; |
988c1ca7 | 398 | } |
d50d0b82 | 399 | |
9f3da356 | 400 | if ((omapi_connection_require (c, link -> imsg_len - 2U)) != |
d50d0b82 TL |
401 | ISC_R_SUCCESS) |
402 | break; | |
403 | case dhcp_flink_message_wait: | |
404 | /* Read in the message. At this point we have the | |
405 | entire message in the input buffer. For each | |
406 | incoming value ID, set a bit in the bitmask | |
407 | indicating that we've gotten it. Maybe flag an | |
408 | error message if the bit is already set. Once | |
409 | we're done reading, we can check the bitmask to | |
410 | make sure that the required fields for each message | |
411 | have been included. */ | |
412 | ||
413 | link -> imsg_count += 2; /* Count the length as read. */ | |
414 | ||
415 | /* Get message type. */ | |
416 | omapi_connection_copyout (&link -> imsg -> type, c, 1); | |
417 | link -> imsg_count++; | |
418 | ||
419 | /* Get message payload offset. */ | |
420 | omapi_connection_copyout (&link -> imsg_payoff, c, 1); | |
421 | link -> imsg_count++; | |
422 | ||
423 | /* Get message time. */ | |
424 | omapi_connection_get_uint32 (c, &link -> imsg -> time); | |
425 | link -> imsg_count += 4; | |
426 | ||
427 | /* Get transaction ID. */ | |
428 | omapi_connection_get_uint32 (c, &link -> imsg -> xid); | |
429 | link -> imsg_count += 4; | |
430 | ||
02ca1b45 TL |
431 | #if defined (DEBUG_FAILOVER_MESSAGES) |
432 | log_info ("link: message %s payoff %d time %ld xid %ld", | |
433 | dhcp_failover_message_name (link -> imsg -> type), | |
434 | link -> imsg_payoff, | |
435 | (unsigned long)link -> imsg -> time, | |
436 | (unsigned long)link -> imsg -> xid); | |
437 | #endif | |
d50d0b82 TL |
438 | /* Skip over any portions of the message header that we |
439 | don't understand. */ | |
d9eefc5d | 440 | if (link -> imsg_payoff - link -> imsg_count) { |
d50d0b82 | 441 | omapi_connection_copyout ((unsigned char *)0, c, |
d9eefc5d | 442 | (link -> imsg_payoff - |
d50d0b82 | 443 | link -> imsg_count)); |
d9eefc5d | 444 | link -> imsg_count = link -> imsg_payoff; |
d50d0b82 TL |
445 | } |
446 | ||
d50d0b82 TL |
447 | /* Now start sucking options off the wire. */ |
448 | while (link -> imsg_count < link -> imsg_len) { | |
988c1ca7 DN |
449 | status = do_a_failover_option (c, link); |
450 | if (status != ISC_R_SUCCESS) | |
d50d0b82 TL |
451 | goto dhcp_flink_fail; |
452 | } | |
453 | ||
9f3da356 TL |
454 | /* If it's a connect message, try to associate it with |
455 | a state object. */ | |
456 | /* XXX this should be authenticated! */ | |
457 | if (link -> imsg -> type == FTM_CONNECT) { | |
007e3ee4 TL |
458 | const char *errmsg; |
459 | int reason; | |
9f3da356 TL |
460 | /* See if we can find a failover_state object that |
461 | matches this connection. This message should only | |
462 | be received by a secondary from a primary. */ | |
463 | for (s = failover_states; s; s = s -> next) { | |
464 | if (dhcp_failover_state_match | |
465 | (s, (u_int8_t *)&link -> imsg -> server_addr, | |
466 | sizeof link -> imsg -> server_addr)) | |
467 | state = s; | |
468 | } | |
469 | ||
470 | /* If we can't find a failover protocol state | |
471 | for this remote host, drop the connection */ | |
472 | if (!state) { | |
007e3ee4 TL |
473 | errmsg = "unknown server"; |
474 | reason = FTR_INVALID_PARTNER; | |
475 | ||
476 | badconnect: | |
9f3da356 TL |
477 | /* XXX Send a refusal message first? |
478 | XXX Look in protocol spec for guidance. */ | |
007e3ee4 | 479 | log_error ("Failover CONNECT from %d.%d.%d.%d: %s", |
9f3da356 TL |
480 | ((u_int8_t *) |
481 | (&link -> imsg -> server_addr)) [0], | |
482 | ((u_int8_t *) | |
483 | (&link -> imsg -> server_addr)) [1], | |
484 | ((u_int8_t *) | |
485 | (&link -> imsg -> server_addr)) [2], | |
486 | ((u_int8_t *) | |
007e3ee4 TL |
487 | (&link -> imsg -> server_addr)) [3], |
488 | errmsg); | |
9f3da356 | 489 | dhcp_failover_send_connectack |
007e3ee4 TL |
490 | ((omapi_object_t *)link, state, |
491 | reason, errmsg); | |
02ca1b45 | 492 | log_info ("failover: disconnect: %s", errmsg); |
9f3da356 | 493 | omapi_disconnect (c, 0); |
25a69ca1 | 494 | link -> state = dhcp_flink_disconnected; |
9f3da356 TL |
495 | return ISC_R_SUCCESS; |
496 | } | |
497 | ||
d758ad8c TL |
498 | if ((cur_time > link -> imsg -> time && |
499 | cur_time - link -> imsg -> time > 60) || | |
500 | (cur_time < link -> imsg -> time && | |
501 | link -> imsg -> time - cur_time > 60)) { | |
502 | errmsg = "time offset too large"; | |
503 | reason = FTR_TIMEMISMATCH; | |
504 | goto badconnect; | |
505 | } | |
506 | ||
007e3ee4 TL |
507 | if (!(link -> imsg -> options_present & FTB_HBA) || |
508 | link -> imsg -> hba.count != 32) { | |
509 | errmsg = "invalid HBA"; | |
510 | reason = FTR_HBA_CONFLICT; /* XXX */ | |
511 | goto badconnect; | |
512 | } | |
513 | if (state -> hba) | |
514 | dfree (state -> hba, MDL); | |
515 | state -> hba = dmalloc (32, MDL); | |
516 | if (!state -> hba) { | |
517 | errmsg = "no memory"; | |
518 | reason = FTR_MISC_REJECT; | |
519 | goto badconnect; | |
520 | } | |
521 | memcpy (state -> hba, link -> imsg -> hba.data, 32); | |
522 | ||
9f3da356 | 523 | if (!link -> state_object) |
20916cae TL |
524 | dhcp_failover_state_reference |
525 | (&link -> state_object, state, MDL); | |
02ca1b45 TL |
526 | if (!link -> peer_address) |
527 | option_cache_reference | |
528 | (&link -> peer_address, | |
529 | state -> partner.address, MDL); | |
9f3da356 TL |
530 | } |
531 | ||
532 | /* If we don't have a state object at this point, it's | |
533 | some kind of bogus situation, so just drop the | |
534 | connection. */ | |
535 | if (!link -> state_object) { | |
02ca1b45 | 536 | log_info ("failover: connect: no matching state."); |
9f3da356 | 537 | omapi_disconnect (c, 1); |
25a69ca1 | 538 | link -> state = dhcp_flink_disconnected; |
9f3da356 TL |
539 | return ISC_R_INVALIDARG; |
540 | } | |
541 | ||
d50d0b82 TL |
542 | /* Once we have the entire message, and we've validated |
543 | it as best we can here, pass it to the parent. */ | |
9f3da356 TL |
544 | omapi_signal ((omapi_object_t *)link -> state_object, |
545 | "message", link); | |
25a69ca1 | 546 | link -> state = dhcp_flink_message_length_wait; |
988c1ca7 | 547 | failover_message_dereference (&link -> imsg, MDL); |
25a69ca1 TL |
548 | /* XXX This is dangerous because we could get into a tight |
549 | XXX loop reading input without servicing any other stuff. | |
550 | XXX There needs to be a way to relinquish control but | |
551 | XXX get it back immediately if there's no other work to | |
552 | XXX do. */ | |
553 | if ((omapi_connection_require (c, 2)) == ISC_R_SUCCESS) | |
554 | goto next_message; | |
d50d0b82 TL |
555 | break; |
556 | ||
557 | default: | |
558 | /* XXX should never get here. Assertion? */ | |
559 | break; | |
560 | } | |
561 | return ISC_R_SUCCESS; | |
562 | } | |
563 | ||
564 | static isc_result_t do_a_failover_option (c, link) | |
d9eefc5d | 565 | omapi_object_t *c; |
d50d0b82 TL |
566 | dhcp_failover_link_t *link; |
567 | { | |
568 | u_int16_t option_code; | |
569 | u_int16_t option_len; | |
d9eefc5d TL |
570 | unsigned char *op; |
571 | unsigned op_size; | |
572 | unsigned op_count; | |
573 | int i; | |
9f3da356 | 574 | isc_result_t status; |
d50d0b82 TL |
575 | |
576 | if (link -> imsg_count + 2 > link -> imsg_len) { | |
577 | log_error ("FAILOVER: message overflow at option code."); | |
578 | return ISC_R_PROTOCOLERROR; | |
579 | } | |
580 | ||
581 | /* Get option code. */ | |
582 | omapi_connection_get_uint16 (c, &option_code); | |
583 | link -> imsg_count += 2; | |
584 | ||
9f3da356 TL |
585 | if (link -> imsg_count + 2 > link -> imsg_len) { |
586 | log_error ("FAILOVER: message overflow at length."); | |
587 | return ISC_R_PROTOCOLERROR; | |
588 | } | |
589 | ||
d50d0b82 TL |
590 | /* Get option length. */ |
591 | omapi_connection_get_uint16 (c, &option_len); | |
592 | link -> imsg_count += 2; | |
593 | ||
594 | if (link -> imsg_count + option_len > link -> imsg_len) { | |
9f3da356 | 595 | log_error ("FAILOVER: message overflow at data."); |
d50d0b82 TL |
596 | return ISC_R_PROTOCOLERROR; |
597 | } | |
598 | ||
599 | /* If it's an unknown code, skip over it. */ | |
600 | if (option_code > FTO_MAX) { | |
02ca1b45 TL |
601 | #if defined (DEBUG_FAILOVER_MESSAGES) |
602 | log_debug (" option code %d (%s) len %d (not recognized)", | |
603 | option_code, | |
604 | dhcp_failover_option_name (option_code), | |
605 | option_len); | |
d50d0b82 TL |
606 | #endif |
607 | omapi_connection_copyout ((unsigned char *)0, c, option_len); | |
d9eefc5d | 608 | link -> imsg_count += option_len; |
d50d0b82 TL |
609 | return ISC_R_SUCCESS; |
610 | } | |
611 | ||
612 | /* If it's the digest, do it now. */ | |
613 | if (ft_options [option_code].type == FT_DIGEST) { | |
614 | link -> imsg_count += option_len; | |
615 | if (link -> imsg_count != link -> imsg_len) { | |
616 | log_error ("FAILOVER: digest not at end of message"); | |
617 | return ISC_R_PROTOCOLERROR; | |
618 | } | |
02ca1b45 | 619 | #if defined (DEBUG_FAILOVER_MESSAGES) |
d50d0b82 TL |
620 | log_debug (" option %s len %d", |
621 | ft_options [option_code].name, option_len); | |
622 | #endif | |
623 | /* For now, just dump it. */ | |
624 | omapi_connection_copyout ((unsigned char *)0, c, option_len); | |
625 | return ISC_R_SUCCESS; | |
626 | } | |
627 | ||
628 | /* Only accept an option once. */ | |
d9eefc5d | 629 | if (link -> imsg -> options_present & ft_options [option_code].bit) { |
d50d0b82 TL |
630 | log_error ("FAILOVER: duplicate option %s", |
631 | ft_options [option_code].name); | |
632 | return ISC_R_PROTOCOLERROR; | |
633 | } | |
634 | ||
635 | /* Make sure the option is appropriate for this type of message. | |
636 | Really, any option is generally allowed for any message, and the | |
637 | cases where this is not true are too complicated to represent in | |
638 | this way - what this code is doing is to just avoid saving the | |
639 | value of an option we don't have any way to use, which allows | |
640 | us to make the failover_message structure smaller. */ | |
641 | if (ft_options [option_code].bit && | |
9f3da356 TL |
642 | !(fto_allowed [link -> imsg -> type] & |
643 | ft_options [option_code].bit)) { | |
d50d0b82 | 644 | omapi_connection_copyout ((unsigned char *)0, c, option_len); |
d9eefc5d | 645 | link -> imsg_count += option_len; |
d50d0b82 TL |
646 | return ISC_R_SUCCESS; |
647 | } | |
648 | ||
649 | /* Figure out how many elements, how big they are, and where | |
650 | to store them. */ | |
651 | if (ft_options [option_code].num_present) { | |
652 | /* If this option takes a fixed number of elements, | |
653 | we expect the space for them to be preallocated, | |
654 | and we can just read the data in. */ | |
655 | ||
9f3da356 | 656 | op = ((unsigned char *)link -> imsg) + |
d9eefc5d | 657 | ft_options [option_code].offset; |
d50d0b82 TL |
658 | op_size = ft_sizes [ft_options [option_code].type]; |
659 | op_count = ft_options [option_code].num_present; | |
660 | ||
d9eefc5d | 661 | if (option_len != op_size * op_count) { |
d50d0b82 | 662 | log_error ("FAILOVER: option size (%d:%d), option %s", |
d9eefc5d | 663 | option_len, |
d50d0b82 TL |
664 | (ft_sizes [ft_options [option_code].type] * |
665 | ft_options [option_code].num_present), | |
666 | ft_options [option_code].name); | |
667 | return ISC_R_PROTOCOLERROR; | |
668 | } | |
669 | } else { | |
d9eefc5d | 670 | failover_option_t *fo; |
d50d0b82 TL |
671 | |
672 | /* FT_DDNS* are special - one or two bytes of status | |
673 | followed by the client FQDN. */ | |
674 | if (ft_options [option_code].type == FT_DDNS1 || | |
675 | ft_options [option_code].type == FT_DDNS1) { | |
d9eefc5d TL |
676 | ddns_fqdn_t *ddns = |
677 | ((ddns_fqdn_t *) | |
007e3ee4 | 678 | (((char *)link -> imsg) + |
d50d0b82 TL |
679 | ft_options [option_code].offset)); |
680 | ||
681 | op_count = (ft_options [option_code].type == FT_DDNS1 | |
682 | ? 1 : 2); | |
683 | ||
684 | omapi_connection_copyout (&ddns -> codes [0], | |
685 | c, op_count); | |
9f3da356 | 686 | link -> imsg_count += op_count; |
d50d0b82 TL |
687 | if (op_count == 1) |
688 | ddns -> codes [1] = 0; | |
689 | op_size = 1; | |
d9eefc5d | 690 | op_count = option_len - op_count; |
d50d0b82 TL |
691 | |
692 | ddns -> length = op_count; | |
4bd8800e | 693 | ddns -> data = dmalloc (op_count, MDL); |
d50d0b82 TL |
694 | if (!ddns -> data) { |
695 | log_error ("FAILOVER: no memory getting%s(%d)", | |
696 | " DNS data ", op_count); | |
697 | ||
698 | /* Actually, NO_MEMORY, but if we lose here | |
699 | we have to drop the connection. */ | |
700 | return ISC_R_PROTOCOLERROR; | |
701 | } | |
702 | omapi_connection_copyout (ddns -> data, c, op_count); | |
703 | goto out; | |
704 | } | |
d9eefc5d | 705 | |
d50d0b82 TL |
706 | /* A zero for num_present means that any number of |
707 | elements can appear, so we have to figure out how | |
708 | many we got from the length of the option, and then | |
709 | fill out a failover_option structure describing the | |
710 | data. */ | |
711 | op_size = ft_sizes [ft_options [option_code].type]; | |
712 | ||
713 | /* Make sure that option data length is a multiple of the | |
714 | size of the data type being sent. */ | |
d9eefc5d TL |
715 | if (op_size > 1 && option_len % op_size) { |
716 | log_error ("FAILOVER: option_len %d not %s%d", | |
717 | option_len, "multiple of ", op_size); | |
d50d0b82 TL |
718 | return ISC_R_PROTOCOLERROR; |
719 | } | |
720 | ||
d9eefc5d | 721 | op_count = option_len / op_size; |
d50d0b82 | 722 | |
d9eefc5d | 723 | fo = ((failover_option_t *) |
007e3ee4 | 724 | (((char *)link -> imsg) + |
d50d0b82 TL |
725 | ft_options [option_code].offset)); |
726 | ||
727 | fo -> count = op_count; | |
4bd8800e | 728 | fo -> data = dmalloc (option_len, MDL); |
d50d0b82 TL |
729 | if (!fo -> data) { |
730 | log_error ("FAILOVER: no memory getting %s (%d)", | |
731 | "option data", op_count); | |
732 | ||
733 | return ISC_R_PROTOCOLERROR; | |
734 | } | |
735 | op = fo -> data; | |
736 | } | |
737 | ||
738 | /* For single-byte message values and multi-byte values that | |
739 | don't need swapping, just read them in all at once. */ | |
740 | if (op_size == 1 || ft_options [option_code].type == FT_IPADDR) { | |
741 | omapi_connection_copyout ((unsigned char *)op, c, option_len); | |
9f3da356 | 742 | link -> imsg_count += option_len; |
d50d0b82 TL |
743 | goto out; |
744 | } | |
745 | ||
746 | /* For values that require swapping, read them in one at a time | |
747 | using routines that swap bytes. */ | |
748 | for (i = 0; i < op_count; i++) { | |
749 | switch (ft_options [option_code].type) { | |
750 | case FT_UINT32: | |
d9eefc5d | 751 | omapi_connection_get_uint32 (c, (u_int32_t *)op); |
d50d0b82 | 752 | op += 4; |
9f3da356 | 753 | link -> imsg_count += 4; |
d50d0b82 TL |
754 | break; |
755 | ||
756 | case FT_UINT16: | |
d9eefc5d | 757 | omapi_connection_get_uint16 (c, (u_int16_t *)op); |
d50d0b82 | 758 | op += 2; |
9f3da356 | 759 | link -> imsg_count += 2; |
d50d0b82 TL |
760 | break; |
761 | ||
762 | default: | |
763 | /* Everything else should have been handled | |
764 | already. */ | |
765 | log_error ("FAILOVER: option %s: bad type %d", | |
766 | ft_options [option_code].name, | |
767 | ft_options [option_code].type); | |
768 | return ISC_R_PROTOCOLERROR; | |
769 | } | |
770 | } | |
771 | out: | |
772 | /* Remember that we got this option. */ | |
d9eefc5d | 773 | link -> imsg -> options_present |= ft_options [option_code].bit; |
d50d0b82 TL |
774 | return ISC_R_SUCCESS; |
775 | } | |
776 | ||
777 | isc_result_t dhcp_failover_link_set_value (omapi_object_t *h, | |
778 | omapi_object_t *id, | |
779 | omapi_data_string_t *name, | |
780 | omapi_typed_data_t *value) | |
781 | { | |
782 | if (h -> type != omapi_type_protocol) | |
783 | return ISC_R_INVALIDARG; | |
784 | ||
785 | /* Never valid to set these. */ | |
d9eefc5d | 786 | if (!omapi_ds_strcmp (name, "link-port") || |
d50d0b82 TL |
787 | !omapi_ds_strcmp (name, "link-name") || |
788 | !omapi_ds_strcmp (name, "link-state")) | |
789 | return ISC_R_NOPERM; | |
790 | ||
791 | if (h -> inner && h -> inner -> type -> set_value) | |
792 | return (*(h -> inner -> type -> set_value)) | |
793 | (h -> inner, id, name, value); | |
794 | return ISC_R_NOTFOUND; | |
795 | } | |
796 | ||
797 | isc_result_t dhcp_failover_link_get_value (omapi_object_t *h, | |
798 | omapi_object_t *id, | |
799 | omapi_data_string_t *name, | |
800 | omapi_value_t **value) | |
801 | { | |
802 | dhcp_failover_link_t *link; | |
803 | ||
804 | if (h -> type != omapi_type_protocol) | |
805 | return ISC_R_INVALIDARG; | |
806 | link = (dhcp_failover_link_t *)h; | |
807 | ||
d9eefc5d TL |
808 | if (!omapi_ds_strcmp (name, "link-port")) { |
809 | return omapi_make_int_value (value, name, | |
4bd8800e | 810 | (int)link -> peer_port, MDL); |
d50d0b82 TL |
811 | } else if (!omapi_ds_strcmp (name, "link-state")) { |
812 | if (link -> state < 0 || | |
d9eefc5d | 813 | link -> state >= dhcp_flink_state_max) |
4bd8800e TL |
814 | return omapi_make_string_value (value, name, |
815 | "invalid link state", | |
816 | MDL); | |
d50d0b82 TL |
817 | return omapi_make_string_value |
818 | (value, name, | |
4bd8800e | 819 | dhcp_flink_state_names [link -> state], MDL); |
d50d0b82 TL |
820 | } |
821 | ||
822 | if (h -> inner && h -> inner -> type -> get_value) | |
823 | return (*(h -> inner -> type -> get_value)) | |
824 | (h -> inner, id, name, value); | |
825 | return ISC_R_NOTFOUND; | |
826 | } | |
827 | ||
4bd8800e TL |
828 | isc_result_t dhcp_failover_link_destroy (omapi_object_t *h, |
829 | const char *file, int line) | |
d50d0b82 | 830 | { |
d9eefc5d | 831 | dhcp_failover_link_t *link; |
d50d0b82 TL |
832 | if (h -> type != dhcp_type_failover_link) |
833 | return ISC_R_INVALIDARG; | |
d9eefc5d | 834 | link = (dhcp_failover_link_t *)h; |
d758ad8c TL |
835 | |
836 | if (link -> peer_address) | |
837 | option_cache_dereference (&link -> peer_address, file, line); | |
838 | if (link -> imsg) | |
839 | failover_message_dereference (&link -> imsg, file, line); | |
85a53735 | 840 | if (link -> state_object) |
d758ad8c TL |
841 | dhcp_failover_state_dereference (&link -> state_object, |
842 | file, line); | |
d50d0b82 TL |
843 | return ISC_R_SUCCESS; |
844 | } | |
845 | ||
846 | /* Write all the published values associated with the object through the | |
847 | specified connection. */ | |
848 | ||
849 | isc_result_t dhcp_failover_link_stuff_values (omapi_object_t *c, | |
850 | omapi_object_t *id, | |
d9eefc5d | 851 | omapi_object_t *l) |
d50d0b82 TL |
852 | { |
853 | dhcp_failover_link_t *link; | |
d9eefc5d | 854 | isc_result_t status; |
d50d0b82 | 855 | |
d9eefc5d | 856 | if (l -> type != dhcp_type_failover_link) |
d50d0b82 | 857 | return ISC_R_INVALIDARG; |
d9eefc5d | 858 | link = (dhcp_failover_link_t *)l; |
d50d0b82 | 859 | |
d9eefc5d | 860 | status = omapi_connection_put_name (c, "link-port"); |
d50d0b82 TL |
861 | if (status != ISC_R_SUCCESS) |
862 | return status; | |
d9eefc5d | 863 | status = omapi_connection_put_uint32 (c, sizeof (int)); |
d50d0b82 TL |
864 | if (status != ISC_R_SUCCESS) |
865 | return status; | |
d9eefc5d | 866 | status = omapi_connection_put_uint32 (c, link -> peer_port); |
d50d0b82 TL |
867 | if (status != ISC_R_SUCCESS) |
868 | return status; | |
869 | ||
d50d0b82 TL |
870 | status = omapi_connection_put_name (c, "link-state"); |
871 | if (status != ISC_R_SUCCESS) | |
872 | return status; | |
873 | if (link -> state < 0 || | |
d9eefc5d | 874 | link -> state >= dhcp_flink_state_max) |
d50d0b82 TL |
875 | status = omapi_connection_put_string (c, "invalid link state"); |
876 | else | |
877 | status = (omapi_connection_put_string | |
d8a417b2 | 878 | (c, dhcp_flink_state_names [link -> state])); |
d50d0b82 TL |
879 | if (status != ISC_R_SUCCESS) |
880 | return status; | |
881 | ||
d9eefc5d TL |
882 | if (link -> inner && link -> inner -> type -> stuff_values) |
883 | return (*(link -> inner -> type -> stuff_values)) (c, id, | |
884 | link -> inner); | |
d50d0b82 TL |
885 | return ISC_R_SUCCESS; |
886 | } | |
887 | ||
888 | /* Set up a listener for the omapi protocol. The handle stored points to | |
889 | a listener object, not a protocol object. */ | |
890 | ||
d9eefc5d | 891 | isc_result_t dhcp_failover_listen (omapi_object_t *h) |
d50d0b82 TL |
892 | { |
893 | isc_result_t status; | |
02ca1b45 | 894 | dhcp_failover_listener_t *obj, *l; |
d50d0b82 | 895 | omapi_value_t *value = (omapi_value_t *)0; |
85a53735 TL |
896 | omapi_addr_t local_addr; |
897 | unsigned long port; | |
d50d0b82 TL |
898 | |
899 | status = omapi_get_value_str (h, (omapi_object_t *)0, | |
900 | "local-port", &value); | |
901 | if (status != ISC_R_SUCCESS) | |
902 | return status; | |
d9eefc5d | 903 | if (!value -> value) { |
4bd8800e | 904 | omapi_value_dereference (&value, MDL); |
d9eefc5d TL |
905 | return ISC_R_INVALIDARG; |
906 | } | |
d50d0b82 | 907 | |
d9eefc5d | 908 | status = omapi_get_int_value (&port, value -> value); |
4bd8800e | 909 | omapi_value_dereference (&value, MDL); |
d50d0b82 TL |
910 | if (status != ISC_R_SUCCESS) |
911 | return status; | |
85a53735 TL |
912 | local_addr.port = port; |
913 | ||
914 | status = omapi_get_value_str (h, (omapi_object_t *)0, | |
915 | "local-address", &value); | |
916 | if (status != ISC_R_SUCCESS) | |
917 | return status; | |
918 | if (!value -> value) { | |
919 | nogood: | |
920 | omapi_value_dereference (&value, MDL); | |
921 | return ISC_R_INVALIDARG; | |
922 | } | |
923 | ||
924 | if (value -> value -> type != omapi_datatype_data || | |
925 | value -> value -> u.buffer.len != sizeof (struct in_addr)) | |
926 | goto nogood; | |
927 | ||
928 | memcpy (local_addr.address, value -> value -> u.buffer.value, | |
929 | value -> value -> u.buffer.len); | |
930 | local_addr.addrlen = value -> value -> u.buffer.len; | |
931 | local_addr.addrtype = AF_INET; | |
932 | ||
933 | omapi_value_dereference (&value, MDL); | |
d50d0b82 | 934 | |
02ca1b45 TL |
935 | /* Are we already listening on this port and address? */ |
936 | for (l = failover_listeners; l; l = l -> next) { | |
937 | if (l -> address.port == local_addr.port && | |
938 | l -> address.addrtype == local_addr.addrtype && | |
939 | l -> address.addrlen == local_addr.addrlen && | |
940 | !memcmp (l -> address.address, local_addr.address, | |
941 | local_addr.addrlen)) | |
942 | break; | |
943 | } | |
944 | /* Already listening. */ | |
945 | if (l) | |
946 | return ISC_R_SUCCESS; | |
947 | ||
20916cae TL |
948 | obj = (dhcp_failover_listener_t *)0; |
949 | status = dhcp_failover_listener_allocate (&obj, MDL); | |
950 | if (status != ISC_R_SUCCESS) | |
951 | return status; | |
02ca1b45 | 952 | obj -> address = local_addr; |
d50d0b82 | 953 | |
02ca1b45 | 954 | status = omapi_listen_addr ((omapi_object_t *)obj, &obj -> address, 1); |
d50d0b82 TL |
955 | if (status != ISC_R_SUCCESS) |
956 | return status; | |
957 | ||
4bd8800e TL |
958 | status = omapi_object_reference (&h -> outer, |
959 | (omapi_object_t *)obj, MDL); | |
d50d0b82 | 960 | if (status != ISC_R_SUCCESS) { |
20916cae | 961 | dhcp_failover_listener_dereference (&obj, MDL); |
d50d0b82 TL |
962 | return status; |
963 | } | |
4bd8800e | 964 | status = omapi_object_reference (&obj -> inner, h, MDL); |
d50d0b82 | 965 | if (status != ISC_R_SUCCESS) { |
20916cae | 966 | dhcp_failover_listener_dereference (&obj, MDL); |
d50d0b82 TL |
967 | return status; |
968 | } | |
969 | ||
02ca1b45 | 970 | /* Put this listener on the list. */ |
d2ff2ec2 TL |
971 | if (failover_listeners) { |
972 | dhcp_failover_listener_reference (&obj -> next, | |
973 | failover_listeners, MDL); | |
974 | dhcp_failover_listener_dereference (&failover_listeners, MDL); | |
975 | } | |
02ca1b45 TL |
976 | dhcp_failover_listener_reference (&failover_listeners, obj, MDL); |
977 | ||
20916cae | 978 | return dhcp_failover_listener_dereference (&obj, MDL); |
d50d0b82 TL |
979 | } |
980 | ||
981 | /* Signal handler for protocol listener - if we get a connect signal, | |
982 | create a new protocol connection, otherwise pass the signal down. */ | |
983 | ||
984 | isc_result_t dhcp_failover_listener_signal (omapi_object_t *o, | |
985 | const char *name, va_list ap) | |
986 | { | |
987 | isc_result_t status; | |
988 | omapi_connection_object_t *c; | |
d9eefc5d TL |
989 | dhcp_failover_link_t *obj; |
990 | dhcp_failover_listener_t *p; | |
85a53735 | 991 | dhcp_failover_state_t *s, *state = (dhcp_failover_state_t *)0; |
d50d0b82 TL |
992 | |
993 | if (!o || o -> type != dhcp_type_failover_listener) | |
994 | return ISC_R_INVALIDARG; | |
d9eefc5d | 995 | p = (dhcp_failover_listener_t *)o; |
d50d0b82 TL |
996 | |
997 | /* Not a signal we recognize? */ | |
998 | if (strcmp (name, "connect")) { | |
999 | if (p -> inner && p -> inner -> type -> signal_handler) | |
1000 | return (*(p -> inner -> type -> signal_handler)) | |
1001 | (p -> inner, name, ap); | |
1002 | return ISC_R_NOTFOUND; | |
1003 | } | |
1004 | ||
1005 | c = va_arg (ap, omapi_connection_object_t *); | |
1006 | if (!c || c -> type != omapi_type_connection) | |
1007 | return ISC_R_INVALIDARG; | |
1008 | ||
02ca1b45 TL |
1009 | /* See if we can find a failover_state object that |
1010 | matches this connection. */ | |
1011 | for (s = failover_states; s; s = s -> next) { | |
1012 | if (dhcp_failover_state_match | |
1013 | (s, (u_int8_t *)&c -> remote_addr.sin_addr, | |
d758ad8c | 1014 | sizeof c -> remote_addr.sin_addr)) { |
02ca1b45 | 1015 | state = s; |
d758ad8c TL |
1016 | break; |
1017 | } | |
02ca1b45 TL |
1018 | } |
1019 | if (!state) { | |
1020 | log_info ("failover: listener: no matching state"); | |
1021 | return omapi_disconnect ((omapi_object_t *)c, 1); | |
1022 | } | |
1023 | ||
20916cae TL |
1024 | obj = (dhcp_failover_link_t *)0; |
1025 | status = dhcp_failover_link_allocate (&obj, MDL); | |
1026 | if (status != ISC_R_SUCCESS) | |
1027 | return status; | |
d9eefc5d | 1028 | obj -> peer_port = ntohs (c -> remote_addr.sin_port); |
d50d0b82 | 1029 | |
4bd8800e TL |
1030 | status = omapi_object_reference (&obj -> outer, |
1031 | (omapi_object_t *)c, MDL); | |
d50d0b82 TL |
1032 | if (status != ISC_R_SUCCESS) { |
1033 | lose: | |
20916cae | 1034 | dhcp_failover_link_dereference (&obj, MDL); |
02ca1b45 | 1035 | log_info ("failover: listener: picayune failure."); |
d9eefc5d | 1036 | omapi_disconnect ((omapi_object_t *)c, 1); |
d50d0b82 TL |
1037 | return status; |
1038 | } | |
1039 | ||
4bd8800e TL |
1040 | status = omapi_object_reference (&c -> inner, |
1041 | (omapi_object_t *)obj, MDL); | |
d50d0b82 TL |
1042 | if (status != ISC_R_SUCCESS) |
1043 | goto lose; | |
1044 | ||
02ca1b45 TL |
1045 | status = dhcp_failover_state_reference (&obj -> state_object, |
1046 | state, MDL); | |
1047 | if (status != ISC_R_SUCCESS) | |
1048 | goto lose; | |
1049 | ||
1050 | omapi_signal_in ((omapi_object_t *)obj, "connect"); | |
1051 | ||
20916cae | 1052 | return dhcp_failover_link_dereference (&obj, MDL); |
d50d0b82 TL |
1053 | } |
1054 | ||
1055 | isc_result_t dhcp_failover_listener_set_value (omapi_object_t *h, | |
1056 | omapi_object_t *id, | |
1057 | omapi_data_string_t *name, | |
1058 | omapi_typed_data_t *value) | |
1059 | { | |
1060 | if (h -> type != dhcp_type_failover_listener) | |
1061 | return ISC_R_INVALIDARG; | |
1062 | ||
1063 | if (h -> inner && h -> inner -> type -> set_value) | |
1064 | return (*(h -> inner -> type -> set_value)) | |
1065 | (h -> inner, id, name, value); | |
1066 | return ISC_R_NOTFOUND; | |
1067 | } | |
1068 | ||
1069 | isc_result_t dhcp_failover_listener_get_value (omapi_object_t *h, | |
1070 | omapi_object_t *id, | |
1071 | omapi_data_string_t *name, | |
1072 | omapi_value_t **value) | |
1073 | { | |
1074 | if (h -> type != dhcp_type_failover_listener) | |
1075 | return ISC_R_INVALIDARG; | |
1076 | ||
1077 | if (h -> inner && h -> inner -> type -> get_value) | |
1078 | return (*(h -> inner -> type -> get_value)) | |
1079 | (h -> inner, id, name, value); | |
1080 | return ISC_R_NOTFOUND; | |
1081 | } | |
1082 | ||
1083 | isc_result_t dhcp_failover_listener_destroy (omapi_object_t *h, | |
4bd8800e | 1084 | const char *file, int line) |
d50d0b82 | 1085 | { |
d758ad8c TL |
1086 | dhcp_failover_listener_t *l; |
1087 | ||
d50d0b82 TL |
1088 | if (h -> type != dhcp_type_failover_listener) |
1089 | return ISC_R_INVALIDARG; | |
d758ad8c TL |
1090 | l = (dhcp_failover_listener_t *)h; |
1091 | if (l -> next) | |
1092 | dhcp_failover_listener_dereference (&l -> next, file, line); | |
1093 | ||
d50d0b82 TL |
1094 | return ISC_R_SUCCESS; |
1095 | } | |
1096 | ||
1097 | /* Write all the published values associated with the object through the | |
1098 | specified connection. */ | |
1099 | ||
1100 | isc_result_t dhcp_failover_listener_stuff (omapi_object_t *c, | |
1101 | omapi_object_t *id, | |
1102 | omapi_object_t *p) | |
1103 | { | |
1104 | int i; | |
1105 | ||
1106 | if (p -> type != dhcp_type_failover_listener) | |
1107 | return ISC_R_INVALIDARG; | |
1108 | ||
1109 | if (p -> inner && p -> inner -> type -> stuff_values) | |
1110 | return (*(p -> inner -> type -> stuff_values)) (c, id, | |
1111 | p -> inner); | |
1112 | return ISC_R_SUCCESS; | |
1113 | } | |
1114 | ||
1115 | /* Set up master state machine for the failover protocol. */ | |
1116 | ||
d9eefc5d | 1117 | isc_result_t dhcp_failover_register (omapi_object_t *h) |
d50d0b82 TL |
1118 | { |
1119 | isc_result_t status; | |
d9eefc5d | 1120 | dhcp_failover_state_t *obj; |
d50d0b82 TL |
1121 | unsigned long port; |
1122 | omapi_value_t *value = (omapi_value_t *)0; | |
1123 | ||
1124 | status = omapi_get_value_str (h, (omapi_object_t *)0, | |
1125 | "local-port", &value); | |
1126 | if (status != ISC_R_SUCCESS) | |
1127 | return status; | |
d9eefc5d | 1128 | if (!value -> value) { |
4bd8800e | 1129 | omapi_value_dereference (&value, MDL); |
d9eefc5d TL |
1130 | return ISC_R_INVALIDARG; |
1131 | } | |
d50d0b82 | 1132 | |
d9eefc5d | 1133 | status = omapi_get_int_value (&port, value -> value); |
4bd8800e | 1134 | omapi_value_dereference (&value, MDL); |
d50d0b82 TL |
1135 | if (status != ISC_R_SUCCESS) |
1136 | return status; | |
1137 | ||
20916cae TL |
1138 | obj = (dhcp_failover_state_t *)0; |
1139 | dhcp_failover_state_allocate (&obj, MDL); | |
02ca1b45 | 1140 | obj -> me.port = port; |
d50d0b82 TL |
1141 | |
1142 | status = omapi_listen ((omapi_object_t *)obj, port, 1); | |
20916cae TL |
1143 | if (status != ISC_R_SUCCESS) { |
1144 | dhcp_failover_state_dereference (&obj, MDL); | |
d50d0b82 | 1145 | return status; |
20916cae | 1146 | } |
d50d0b82 TL |
1147 | |
1148 | status = omapi_object_reference (&h -> outer, (omapi_object_t *)obj, | |
4bd8800e | 1149 | MDL); |
d50d0b82 | 1150 | if (status != ISC_R_SUCCESS) { |
20916cae | 1151 | dhcp_failover_state_dereference (&obj, MDL); |
d50d0b82 TL |
1152 | return status; |
1153 | } | |
4bd8800e | 1154 | status = omapi_object_reference (&obj -> inner, h, MDL); |
20916cae | 1155 | dhcp_failover_state_dereference (&obj, MDL); |
d50d0b82 TL |
1156 | return status; |
1157 | } | |
1158 | ||
1159 | /* Signal handler for protocol state machine. */ | |
1160 | ||
1161 | isc_result_t dhcp_failover_state_signal (omapi_object_t *o, | |
1162 | const char *name, va_list ap) | |
1163 | { | |
1164 | isc_result_t status; | |
1165 | omapi_connection_object_t *c; | |
1166 | omapi_protocol_object_t *obj; | |
d9eefc5d | 1167 | dhcp_failover_state_t *state; |
9f3da356 | 1168 | dhcp_failover_link_t *link; |
d50d0b82 TL |
1169 | char *peer_name; |
1170 | ||
1171 | if (!o || o -> type != dhcp_type_failover_state) | |
1172 | return ISC_R_INVALIDARG; | |
d9eefc5d | 1173 | state = (dhcp_failover_state_t *)o; |
d50d0b82 TL |
1174 | |
1175 | /* Not a signal we recognize? */ | |
9f3da356 | 1176 | if (strcmp (name, "disconnect") && |
d50d0b82 | 1177 | strcmp (name, "message")) { |
d9eefc5d TL |
1178 | if (state -> inner && state -> inner -> type -> signal_handler) |
1179 | return (*(state -> inner -> type -> signal_handler)) | |
1180 | (state -> inner, name, ap); | |
d50d0b82 TL |
1181 | return ISC_R_NOTFOUND; |
1182 | } | |
1183 | ||
85a53735 TL |
1184 | /* Handle connect signals by seeing what state we're in |
1185 | and potentially doing a state transition. */ | |
9f3da356 TL |
1186 | if (!strcmp (name, "disconnect")) { |
1187 | link = va_arg (ap, dhcp_failover_link_t *); | |
1188 | ||
20916cae | 1189 | dhcp_failover_link_dereference (&state -> link_to_peer, MDL); |
9f3da356 | 1190 | dhcp_failover_state_transition (state, "disconnect"); |
0db87765 TL |
1191 | if (state -> i_am == primary) { |
1192 | #if defined (DEBUG_FAILOVER_TIMING) | |
1193 | log_info ("add_timeout +90 %s", | |
1194 | "dhcp_failover_reconnect"); | |
1195 | #endif | |
9f3da356 | 1196 | add_timeout (cur_time + 90, dhcp_failover_reconnect, |
20916cae TL |
1197 | state, |
1198 | (tvref_t)dhcp_failover_state_reference, | |
1199 | (tvunref_t) | |
1200 | dhcp_failover_state_dereference); | |
0db87765 | 1201 | } |
9f3da356 TL |
1202 | } else if (!strcmp (name, "message")) { |
1203 | link = va_arg (ap, dhcp_failover_link_t *); | |
1204 | ||
1205 | if (link -> imsg -> type == FTM_CONNECT) { | |
1206 | /* If we already have a link to the peer, it must be | |
1207 | dead, so drop it. | |
02ca1b45 TL |
1208 | XXX Is this the right thing to do? |
1209 | XXX Probably not - what if both peers start at | |
1210 | XXX the same time? */ | |
9f3da356 | 1211 | if (state -> link_to_peer) { |
02ca1b45 TL |
1212 | dhcp_failover_send_connectack |
1213 | ((omapi_object_t *)link, state, | |
1214 | FTR_DUP_CONNECTION, | |
1215 | "already connected"); | |
1216 | omapi_disconnect (link -> outer, 1); | |
1217 | return ISC_R_SUCCESS; | |
9f3da356 | 1218 | } |
02ca1b45 TL |
1219 | if (!(link -> imsg -> options_present & FTB_MCLT)) { |
1220 | dhcp_failover_send_connectack | |
1221 | ((omapi_object_t *)link, state, | |
1222 | FTR_INVALID_MCLT, | |
1223 | "no MCLT provided"); | |
1224 | omapi_disconnect (link -> outer, 1); | |
1225 | return ISC_R_SUCCESS; | |
1226 | } | |
1227 | ||
20916cae TL |
1228 | dhcp_failover_link_reference (&state -> link_to_peer, |
1229 | link, MDL); | |
9f3da356 | 1230 | status = (dhcp_failover_send_connectack |
007e3ee4 | 1231 | ((omapi_object_t *)link, state, 0, 0)); |
9f3da356 | 1232 | if (status != ISC_R_SUCCESS) { |
20916cae | 1233 | dhcp_failover_link_dereference |
9f3da356 | 1234 | (&state -> link_to_peer, MDL); |
02ca1b45 TL |
1235 | log_info ("dhcp_failover_send_connectack: %s", |
1236 | isc_result_totext (status)); | |
9f3da356 TL |
1237 | omapi_disconnect (link -> outer, 1); |
1238 | return ISC_R_SUCCESS; | |
1239 | } | |
02ca1b45 TL |
1240 | if (link -> imsg -> options_present & FTB_MAX_UNACKED) |
1241 | state -> partner.max_flying_updates = | |
1242 | link -> imsg -> max_unacked; | |
1243 | if (link -> imsg -> options_present & | |
1244 | FTB_RECEIVE_TIMER) | |
1245 | state -> partner.max_response_delay = | |
1246 | link -> imsg -> receive_timer; | |
1247 | state -> mclt = link -> imsg -> mclt; | |
1248 | dhcp_failover_send_state (state); | |
1249 | cancel_timeout (dhcp_failover_link_startup_timeout, | |
1250 | link); | |
9f3da356 | 1251 | } else if (link -> imsg -> type == FTM_CONNECTACK) { |
007e3ee4 TL |
1252 | const char *errmsg; |
1253 | int reason; | |
da292833 TL |
1254 | |
1255 | cancel_timeout (dhcp_failover_link_startup_timeout, | |
1256 | link); | |
1257 | ||
9f3da356 | 1258 | if (link -> imsg -> reject_reason) { |
007e3ee4 | 1259 | log_error ("Failover CONNECT to %d.%d.%d.%d%s%s", |
9f3da356 TL |
1260 | ((u_int8_t *) |
1261 | (&link -> imsg -> server_addr)) [0], | |
1262 | ((u_int8_t *) | |
1263 | (&link -> imsg -> server_addr)) [1], | |
1264 | ((u_int8_t *) | |
1265 | (&link -> imsg -> server_addr)) [2], | |
1266 | ((u_int8_t *) | |
1267 | (&link -> imsg -> server_addr)) [3], | |
1268 | " rejected: ", | |
1269 | (dhcp_failover_reject_reason_print | |
1270 | (link -> imsg -> reject_reason))); | |
007e3ee4 | 1271 | /* XXX print message from peer if peer sent message. */ |
9f3da356 TL |
1272 | omapi_disconnect (link -> outer, 1); |
1273 | return ISC_R_SUCCESS; | |
1274 | } | |
1275 | ||
1276 | if (!dhcp_failover_state_match | |
1277 | (state, | |
1278 | (u_int8_t *)&link -> imsg -> server_addr, | |
1279 | sizeof link -> imsg -> server_addr)) { | |
007e3ee4 TL |
1280 | errmsg = "unknown server"; |
1281 | reason = FTR_INVALID_PARTNER; | |
1282 | badconnectack: | |
1283 | log_error ("Failover CONNECTACK from %d.%d.%d.%d: %s", | |
9f3da356 TL |
1284 | ((u_int8_t *) |
1285 | (&link -> imsg -> server_addr)) [0], | |
1286 | ((u_int8_t *) | |
1287 | (&link -> imsg -> server_addr)) [1], | |
1288 | ((u_int8_t *) | |
1289 | (&link -> imsg -> server_addr)) [2], | |
1290 | ((u_int8_t *) | |
007e3ee4 TL |
1291 | (&link -> imsg -> server_addr)) [3], |
1292 | errmsg); | |
9f3da356 | 1293 | dhcp_failover_send_disconnect ((omapi_object_t *)link, |
007e3ee4 | 1294 | reason, errmsg); |
9f3da356 | 1295 | omapi_disconnect (link -> outer, 0); |
6f0b9ed0 | 1296 | return ISC_R_SUCCESS; |
9f3da356 | 1297 | } |
25a69ca1 TL |
1298 | |
1299 | if (state -> link_to_peer) { | |
007e3ee4 TL |
1300 | errmsg = "already connected"; |
1301 | reason = FTR_DUP_CONNECTION; | |
1302 | goto badconnectack; | |
25a69ca1 | 1303 | } |
007e3ee4 | 1304 | |
d758ad8c TL |
1305 | if ((cur_time > link -> imsg -> time && |
1306 | cur_time - link -> imsg -> time > 60) || | |
1307 | (cur_time < link -> imsg -> time && | |
1308 | link -> imsg -> time - cur_time > 60)) { | |
1309 | errmsg = "time offset too large"; | |
1310 | reason = FTR_TIMEMISMATCH; | |
1311 | goto badconnectack; | |
1312 | } | |
1313 | ||
20916cae TL |
1314 | dhcp_failover_link_reference (&state -> link_to_peer, |
1315 | link, MDL); | |
02ca1b45 | 1316 | #if 0 |
fd273e02 TL |
1317 | /* XXX This is probably the right thing to do, but |
1318 | XXX for release three, to make the smallest possible | |
1319 | XXX change, we are doing this when the peer state | |
1320 | XXX changes instead. */ | |
1321 | if (state -> me.state == startup) | |
1322 | dhcp_failover_set_state (state, | |
1323 | state -> saved_state); | |
1324 | else | |
02ca1b45 | 1325 | #endif |
fd273e02 TL |
1326 | dhcp_failover_send_state (state); |
1327 | ||
02ca1b45 TL |
1328 | if (link -> imsg -> options_present & FTB_MAX_UNACKED) |
1329 | state -> partner.max_flying_updates = | |
1330 | link -> imsg -> max_unacked; | |
1331 | if (link -> imsg -> options_present & FTB_RECEIVE_TIMER) | |
1332 | state -> partner.max_response_delay = | |
1333 | link -> imsg -> receive_timer; | |
0db87765 TL |
1334 | #if defined (DEBUG_FAILOVER_TIMING) |
1335 | log_info ("add_timeout +%d %s", | |
1336 | (int)state -> partner.max_response_delay / 3, | |
1337 | "dhcp_failover_send_contact"); | |
1338 | #endif | |
6f0b9ed0 | 1339 | add_timeout (cur_time + |
02ca1b45 | 1340 | (int)state -> partner.max_response_delay / 3, |
6f0b9ed0 TL |
1341 | dhcp_failover_send_contact, state, |
1342 | (tvref_t)dhcp_failover_state_reference, | |
1343 | (tvunref_t)dhcp_failover_state_dereference); | |
0db87765 TL |
1344 | #if defined (DEBUG_FAILOVER_TIMING) |
1345 | log_info ("add_timeout +%d %s", | |
1346 | (int)state -> me.max_response_delay, | |
1347 | "dhcp_failover_timeout"); | |
1348 | #endif | |
6f0b9ed0 | 1349 | add_timeout (cur_time + |
02ca1b45 | 1350 | (int)state -> me.max_response_delay, |
6f0b9ed0 TL |
1351 | dhcp_failover_timeout, state, |
1352 | (tvref_t)dhcp_failover_state_reference, | |
1353 | (tvunref_t)dhcp_failover_state_dereference); | |
9f3da356 TL |
1354 | } else if (link -> imsg -> type == FTM_DISCONNECT) { |
1355 | if (link -> imsg -> reject_reason) { | |
1356 | log_error ("Failover DISCONNECT from %d.%d.%d.%d%s%s", | |
1357 | ((u_int8_t *) | |
1358 | (&link -> imsg -> server_addr)) [0], | |
1359 | ((u_int8_t *) | |
1360 | (&link -> imsg -> server_addr)) [1], | |
1361 | ((u_int8_t *) | |
1362 | (&link -> imsg -> server_addr)) [2], | |
1363 | ((u_int8_t *) | |
1364 | (&link -> imsg -> server_addr)) [3], | |
1365 | ": ", | |
1366 | (dhcp_failover_reject_reason_print | |
1367 | (link -> imsg -> reject_reason))); | |
1368 | } | |
1369 | omapi_disconnect (link -> outer, 1); | |
9f3da356 | 1370 | } else if (link -> imsg -> type == FTM_BNDUPD) { |
8c8e27c5 TL |
1371 | dhcp_failover_process_bind_update (state, |
1372 | link -> imsg); | |
9f3da356 | 1373 | } else if (link -> imsg -> type == FTM_BNDACK) { |
8c8e27c5 | 1374 | dhcp_failover_process_bind_ack (state, link -> imsg); |
5f0c7be1 TL |
1375 | } else if (link -> imsg -> type == FTM_UPDREQ) { |
1376 | dhcp_failover_process_update_request (state, | |
1377 | link -> imsg); | |
1378 | } else if (link -> imsg -> type == FTM_UPDREQALL) { | |
1379 | dhcp_failover_process_update_request_all | |
1380 | (state, link -> imsg); | |
1381 | } else if (link -> imsg -> type == FTM_UPDDONE) { | |
1382 | dhcp_failover_process_update_done (state, | |
1383 | link -> imsg); | |
8c8e27c5 TL |
1384 | } else if (link -> imsg -> type == FTM_POOLREQ) { |
1385 | dhcp_failover_pool_rebalance (state); | |
1386 | } else if (link -> imsg -> type == FTM_POOLRESP) { | |
165bce70 TL |
1387 | log_info ("pool response: %ld leases", |
1388 | (unsigned long) | |
8c8e27c5 | 1389 | link -> imsg -> addresses_transferred); |
02ca1b45 | 1390 | } else if (link -> imsg -> type == FTM_STATE) { |
5f0c7be1 TL |
1391 | dhcp_failover_peer_state_changed (state, |
1392 | link -> imsg); | |
02ca1b45 | 1393 | } |
85a53735 | 1394 | |
da292833 TL |
1395 | /* Add a timeout so that if the partner doesn't send |
1396 | another message for the maximum transmit idle time | |
1397 | plus a grace of one second, we close the | |
1398 | connection. */ | |
1399 | if (state -> link_to_peer && | |
1400 | state -> link_to_peer == link && | |
1401 | state -> link_to_peer -> state != dhcp_flink_disconnected) | |
0db87765 TL |
1402 | { |
1403 | #if defined (DEBUG_FAILOVER_TIMING) | |
1404 | log_info ("add_timeout +%d %s", | |
1405 | (int)state -> me.max_response_delay, | |
1406 | "dhcp_failover_timeout"); | |
1407 | #endif | |
da292833 TL |
1408 | add_timeout (cur_time + |
1409 | (int)state -> me.max_response_delay, | |
1410 | dhcp_failover_timeout, state, | |
1411 | (tvref_t)dhcp_failover_state_reference, | |
1412 | (tvunref_t)dhcp_failover_state_dereference); | |
1413 | ||
0db87765 | 1414 | } |
da292833 | 1415 | } |
6f0b9ed0 | 1416 | |
d9eefc5d TL |
1417 | /* Handle all the events we care about... */ |
1418 | return ISC_R_SUCCESS; | |
d50d0b82 TL |
1419 | } |
1420 | ||
85a53735 TL |
1421 | isc_result_t dhcp_failover_state_transition (dhcp_failover_state_t *state, |
1422 | const char *name) | |
1423 | { | |
d758ad8c TL |
1424 | isc_result_t status; |
1425 | ||
85a53735 TL |
1426 | /* XXX Check these state transitions against the spec! */ |
1427 | if (!strcmp (name, "disconnect")) { | |
e651f9b2 | 1428 | if (state -> link_to_peer) { |
02ca1b45 | 1429 | log_info ("peer %s: disconnected", state -> name); |
e651f9b2 TL |
1430 | if (state -> link_to_peer -> state_object) |
1431 | dhcp_failover_state_dereference | |
1432 | (&state -> link_to_peer -> state_object, MDL); | |
1433 | dhcp_failover_link_dereference (&state -> link_to_peer, | |
1434 | MDL); | |
1435 | } | |
1436 | cancel_timeout (dhcp_failover_send_contact, state); | |
1437 | cancel_timeout (dhcp_failover_timeout, state); | |
02ca1b45 | 1438 | cancel_timeout (dhcp_failover_startup_timeout, state); |
e651f9b2 | 1439 | |
02ca1b45 TL |
1440 | switch (state -> me.state == startup ? |
1441 | state -> saved_state : state -> me.state) { | |
5f0c7be1 | 1442 | case resolution_interrupted: |
85a53735 TL |
1443 | case partner_down: |
1444 | case communications_interrupted: | |
31bbee78 | 1445 | case recover: |
85a53735 | 1446 | /* Already in the right state? */ |
02ca1b45 TL |
1447 | if (state -> me.state == startup) |
1448 | return (dhcp_failover_set_state | |
1449 | (state, state -> saved_state)); | |
85a53735 TL |
1450 | return ISC_R_SUCCESS; |
1451 | ||
1452 | case potential_conflict: | |
1453 | return dhcp_failover_set_state | |
5f0c7be1 | 1454 | (state, resolution_interrupted); |
85a53735 | 1455 | |
85a53735 TL |
1456 | case normal: |
1457 | return dhcp_failover_set_state | |
1458 | (state, communications_interrupted); | |
1459 | ||
9f3da356 | 1460 | case unknown_state: |
85a53735 | 1461 | return dhcp_failover_set_state |
5f0c7be1 | 1462 | (state, resolution_interrupted); |
02ca1b45 TL |
1463 | case startup: |
1464 | break; /* can't happen. */ | |
85a53735 TL |
1465 | } |
1466 | } else if (!strcmp (name, "connect")) { | |
02ca1b45 | 1467 | switch (state -> me.state) { |
85a53735 | 1468 | case communications_interrupted: |
d758ad8c TL |
1469 | status = dhcp_failover_set_state (state, normal); |
1470 | dhcp_failover_send_updates (state); | |
1471 | return status; | |
9f3da356 | 1472 | |
5f0c7be1 | 1473 | case resolution_interrupted: |
9f3da356 TL |
1474 | return dhcp_failover_set_state (state, |
1475 | potential_conflict); | |
1476 | ||
02ca1b45 | 1477 | case partner_down: |
85a53735 | 1478 | case potential_conflict: |
9f3da356 | 1479 | case normal: |
02ca1b45 TL |
1480 | case recover: |
1481 | case shut_down: | |
1482 | case paused: | |
9f3da356 | 1483 | case unknown_state: |
d9539882 TL |
1484 | case recover_done: |
1485 | case startup: | |
fd273e02 | 1486 | case recover_wait: |
02ca1b45 | 1487 | return dhcp_failover_send_state (state); |
9f3da356 TL |
1488 | } |
1489 | } else if (!strcmp (name, "startup")) { | |
02ca1b45 TL |
1490 | dhcp_failover_set_state (state, startup); |
1491 | return ISC_R_SUCCESS; | |
5f0c7be1 | 1492 | } else if (!strcmp (name, "connect-timeout")) { |
02ca1b45 | 1493 | switch (state -> me.state) { |
9f3da356 TL |
1494 | case communications_interrupted: |
1495 | case partner_down: | |
5f0c7be1 | 1496 | case resolution_interrupted: |
9f3da356 TL |
1497 | return ISC_R_SUCCESS; |
1498 | ||
85a53735 | 1499 | case normal: |
9f3da356 TL |
1500 | case recover: |
1501 | return dhcp_failover_set_state | |
1502 | (state, communications_interrupted); | |
1503 | ||
1504 | case potential_conflict: | |
1505 | return dhcp_failover_set_state | |
5f0c7be1 | 1506 | (state, resolution_interrupted); |
9f3da356 TL |
1507 | |
1508 | case unknown_state: | |
1509 | return dhcp_failover_set_state | |
1510 | (state, communications_interrupted); | |
1511 | ||
1512 | default: | |
1513 | return dhcp_failover_set_state | |
5f0c7be1 | 1514 | (state, resolution_interrupted); |
85a53735 | 1515 | } |
85a53735 TL |
1516 | } |
1517 | return ISC_R_INVALIDARG; | |
1518 | } | |
1519 | ||
5f0c7be1 TL |
1520 | isc_result_t dhcp_failover_set_service_state (dhcp_failover_state_t *state) |
1521 | { | |
02ca1b45 | 1522 | switch (state -> me.state) { |
5f0c7be1 TL |
1523 | case unknown_state: |
1524 | state -> service_state = not_responding; | |
1525 | state -> nrr = " (my state unknown)"; | |
1526 | break; | |
1527 | ||
1528 | case partner_down: | |
1529 | state -> service_state = service_partner_down; | |
1530 | state -> nrr = ""; | |
1531 | break; | |
1532 | ||
1533 | case normal: | |
1534 | state -> service_state = cooperating; | |
1535 | state -> nrr = ""; | |
1536 | break; | |
1537 | ||
1538 | case communications_interrupted: | |
1539 | state -> service_state = not_cooperating; | |
1540 | state -> nrr = ""; | |
1541 | break; | |
1542 | ||
1543 | case resolution_interrupted: | |
1544 | case potential_conflict: | |
1545 | state -> service_state = not_responding; | |
1546 | state -> nrr = " (resolving conflicts)"; | |
1547 | break; | |
1548 | ||
1549 | case recover: | |
1550 | state -> service_state = not_responding; | |
1551 | state -> nrr = " (recovering)"; | |
1552 | break; | |
1553 | ||
1554 | case shut_down: | |
1555 | state -> service_state = not_responding; | |
1556 | state -> nrr = " (shut down)"; | |
1557 | break; | |
1558 | ||
1559 | case paused: | |
1560 | state -> service_state = not_responding; | |
1561 | state -> nrr = " (paused)"; | |
1562 | break; | |
1563 | ||
fd273e02 TL |
1564 | case recover_wait: |
1565 | state -> service_state = not_responding; | |
1566 | state -> nrr = " (recover wait)"; | |
1567 | break; | |
1568 | ||
5f0c7be1 TL |
1569 | case recover_done: |
1570 | state -> service_state = not_responding; | |
1571 | state -> nrr = " (recover done)"; | |
1572 | break; | |
02ca1b45 TL |
1573 | |
1574 | case startup: | |
1575 | state -> service_state = service_startup; | |
1576 | state -> nrr = " (startup)"; | |
1577 | break; | |
5f0c7be1 TL |
1578 | } |
1579 | ||
1580 | /* Some peer states can require us not to respond, even if our | |
1581 | state doesn't. */ | |
1582 | /* XXX hm. I suspect this isn't true anymore. */ | |
1583 | if (state -> service_state != not_responding) { | |
02ca1b45 | 1584 | switch (state -> partner.state) { |
5f0c7be1 TL |
1585 | case partner_down: |
1586 | case recover: | |
1587 | state -> service_state = not_responding; | |
1588 | state -> nrr = " (recovering)"; | |
1589 | break; | |
1590 | ||
1591 | case potential_conflict: | |
1592 | state -> service_state = not_responding; | |
1593 | state -> nrr = " (resolving conflicts)"; | |
1594 | break; | |
1595 | ||
1596 | /* Other peer states don't affect our behaviour. */ | |
1597 | default: | |
1598 | break; | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | return ISC_R_SUCCESS; | |
1603 | } | |
1604 | ||
85a53735 TL |
1605 | isc_result_t dhcp_failover_set_state (dhcp_failover_state_t *state, |
1606 | enum failover_state new_state) | |
1607 | { | |
9f3da356 TL |
1608 | enum failover_state saved_state; |
1609 | TIME saved_stos; | |
31bbee78 TL |
1610 | struct pool *p; |
1611 | struct shared_network *s; | |
1612 | struct lease *l; | |
9f3da356 | 1613 | |
85a53735 | 1614 | /* First make the transition out of the current state. */ |
02ca1b45 | 1615 | switch (state -> me.state) { |
85a53735 | 1616 | case normal: |
85a53735 TL |
1617 | /* Any updates that haven't been acked yet, we have to |
1618 | resend, just in case. */ | |
1619 | if (state -> ack_queue_tail) { | |
25a69ca1 | 1620 | struct lease *lp; |
fd273e02 | 1621 | |
25a69ca1 TL |
1622 | /* Zap the flags. */ |
1623 | for (lp = state -> ack_queue_head; lp; lp = lp -> next_pending) | |
1624 | lp -> flags = ((lp -> flags & ~ON_ACK_QUEUE) | | |
1625 | ON_UPDATE_QUEUE); | |
fd273e02 | 1626 | |
25a69ca1 TL |
1627 | /* Now hook the ack queue to the beginning of the update |
1628 | queue. */ | |
85a53735 | 1629 | if (state -> update_queue_head) { |
fd273e02 TL |
1630 | lease_reference (&state -> ack_queue_tail -> next_pending, |
1631 | state -> update_queue_head, MDL); | |
1632 | lease_dereference (&state -> update_queue_head, MDL); | |
85a53735 | 1633 | } |
20916cae TL |
1634 | lease_reference (&state -> update_queue_head, |
1635 | state -> ack_queue_head, MDL); | |
da292833 TL |
1636 | if (!state -> update_queue_tail) { |
1637 | #if defined (POINTER_DEBUG) | |
fd273e02 TL |
1638 | if (state -> ack_queue_tail -> next_pending) { |
1639 | log_error ("next pending on ack queue tail."); | |
1640 | abort (); | |
1641 | } | |
da292833 | 1642 | #endif |
fd273e02 TL |
1643 | lease_reference (&state -> update_queue_tail, |
1644 | state -> ack_queue_tail, MDL); | |
da292833 | 1645 | } |
20916cae TL |
1646 | lease_dereference (&state -> ack_queue_tail, MDL); |
1647 | lease_dereference (&state -> ack_queue_head, MDL); | |
85a53735 TL |
1648 | state -> cur_unacked_updates = 0; |
1649 | } | |
1650 | cancel_timeout (dhcp_failover_keepalive, state); | |
1651 | break; | |
fd273e02 | 1652 | |
5f0c7be1 | 1653 | case recover: |
fd273e02 TL |
1654 | case recover_wait: |
1655 | case recover_done: | |
5f0c7be1 | 1656 | case potential_conflict: |
85a53735 TL |
1657 | case partner_down: |
1658 | case communications_interrupted: | |
5f0c7be1 | 1659 | case resolution_interrupted: |
02ca1b45 | 1660 | case startup: |
85a53735 TL |
1661 | default: |
1662 | break; | |
1663 | } | |
1664 | ||
9f3da356 | 1665 | /* Tentatively make the transition. */ |
02ca1b45 TL |
1666 | saved_state = state -> me.state; |
1667 | saved_stos = state -> me.stos; | |
d758ad8c TL |
1668 | |
1669 | /* Keep the old stos if we're going into recover_wait or if we're | |
1670 | coming into or out of startup. */ | |
1671 | if (new_state != recover_wait && new_state != startup && | |
1672 | saved_state != startup) | |
fd273e02 | 1673 | state -> me.stos = cur_time; |
d758ad8c TL |
1674 | |
1675 | /* If we're in shutdown, peer is in partner_down, and we're moving | |
1676 | to recover, we can skip waiting for MCLT to expire. This happens | |
1677 | when a server is moved administratively into shutdown prior to | |
1678 | actually shutting down. Of course, if there are any updates | |
1679 | pending we can't actually do this. */ | |
1680 | if (new_state == recover && saved_state == shut_down && | |
1681 | state -> partner.state == partner_down && | |
1682 | !state -> update_queue_head && !state -> ack_queue_head) | |
1683 | state -> me.stos = cur_time - state -> mclt; | |
1684 | ||
837d4342 | 1685 | state -> me.state = new_state; |
d758ad8c TL |
1686 | if (new_state == startup && saved_state != startup) |
1687 | state -> saved_state = saved_state; | |
9f3da356 | 1688 | |
d758ad8c | 1689 | /* If we can't record the new state, we can't make a state transition. */ |
9f3da356 | 1690 | if (!write_failover_state (state) || !commit_leases ()) { |
9f3da356 TL |
1691 | log_error ("Unable to record current failover state for %s", |
1692 | state -> name); | |
02ca1b45 TL |
1693 | state -> me.state = saved_state; |
1694 | state -> me.stos = saved_stos; | |
9f3da356 TL |
1695 | return ISC_R_IOERROR; |
1696 | } | |
1697 | ||
5f0c7be1 | 1698 | log_info ("failover peer %s: I move from %s to %s", |
9f3da356 | 1699 | state -> name, dhcp_failover_state_name_print (saved_state), |
02ca1b45 | 1700 | dhcp_failover_state_name_print (state -> me.state)); |
9f3da356 | 1701 | |
da292833 TL |
1702 | /* If we were in startup and we just left it, cancel the timeout. */ |
1703 | if (new_state != startup && saved_state == startup) | |
1704 | cancel_timeout (dhcp_failover_startup_timeout, state); | |
1705 | ||
1706 | /* Set our service state. */ | |
1707 | dhcp_failover_set_service_state (state); | |
1708 | ||
1709 | /* Tell the peer about it. */ | |
1710 | if (state -> link_to_peer) | |
1711 | dhcp_failover_send_state (state); | |
1712 | ||
fd273e02 TL |
1713 | switch (new_state) { |
1714 | case normal: | |
1715 | if (state -> partner.state == normal) | |
1716 | dhcp_failover_state_pool_check (state); | |
1717 | break; | |
1718 | ||
1719 | case potential_conflict: | |
1720 | if (state -> i_am == primary) | |
1721 | dhcp_failover_send_update_request (state); | |
1722 | break; | |
1723 | ||
1724 | case startup: | |
0db87765 TL |
1725 | #if defined (DEBUG_FAILOVER_TIMING) |
1726 | log_info ("add_timeout +15 %s", | |
1727 | "dhcp_failover_startup_timeout"); | |
1728 | #endif | |
fd273e02 TL |
1729 | add_timeout (cur_time + 15, |
1730 | dhcp_failover_startup_timeout, | |
1731 | state, | |
1732 | (tvref_t)omapi_object_reference, | |
1733 | (tvunref_t) | |
1734 | omapi_object_dereference); | |
1735 | break; | |
1736 | ||
1737 | /* If we come back in recover_wait and there's still waiting | |
1738 | to do, set a timeout. */ | |
1739 | case recover_wait: | |
0db87765 TL |
1740 | if (state -> me.stos + state -> mclt > cur_time) { |
1741 | #if defined (DEBUG_FAILOVER_TIMING) | |
1742 | log_info ("add_timeout +%d %s", | |
1743 | (int)(cur_time - | |
1744 | state -> me.stos + state -> mclt), | |
1745 | "dhcp_failover_startup_timeout"); | |
1746 | #endif | |
fd273e02 TL |
1747 | add_timeout ((int)(state -> me.stos + state -> mclt), |
1748 | dhcp_failover_recover_done, | |
1749 | state, | |
1750 | (tvref_t)omapi_object_reference, | |
1751 | (tvunref_t) | |
1752 | omapi_object_dereference); | |
0db87765 | 1753 | } else |
d758ad8c | 1754 | dhcp_failover_recover_done (state); |
fd273e02 TL |
1755 | break; |
1756 | ||
01c6e68a TL |
1757 | case recover: |
1758 | if (state -> link_to_peer) | |
1759 | dhcp_failover_send_update_request_all (state); | |
1760 | break; | |
1761 | ||
31bbee78 TL |
1762 | case partner_down: |
1763 | /* For every expired lease, set a timeout for it to become free. */ | |
1764 | for (s = shared_networks; s; s = s -> next) { | |
1765 | for (p = s -> pools; p; p = p -> next) { | |
1766 | if (p -> failover_peer == state) { | |
1767 | for (l = p -> expired; l; l = l -> next) | |
1768 | l -> tsfp = state -> me.stos + state -> mclt; | |
1769 | if (p -> next_event_time > | |
1770 | state -> me.stos + state -> mclt) { | |
1771 | p -> next_event_time = | |
1772 | state -> me.stos + state -> mclt; | |
0db87765 TL |
1773 | #if defined (DEBUG_FAILOVER_TIMING) |
1774 | log_info ("add_timeout +%d %s", | |
1775 | (int)(cur_time - p -> next_event_time), | |
1776 | "pool_timer"); | |
1777 | #endif | |
31bbee78 TL |
1778 | add_timeout (p -> next_event_time, pool_timer, p, |
1779 | (tvref_t)pool_reference, | |
1780 | (tvunref_t)pool_dereference); | |
1781 | } | |
1782 | } | |
1783 | } | |
1784 | } | |
1785 | break; | |
1786 | ||
1787 | ||
fd273e02 TL |
1788 | default: |
1789 | break; | |
85a53735 | 1790 | } |
9f3da356 | 1791 | |
85a53735 TL |
1792 | return ISC_R_SUCCESS; |
1793 | } | |
1794 | ||
5f0c7be1 TL |
1795 | isc_result_t dhcp_failover_peer_state_changed (dhcp_failover_state_t *state, |
1796 | failover_message_t *msg) | |
1797 | { | |
02ca1b45 TL |
1798 | enum failover_state previous_state = state -> partner.state; |
1799 | enum failover_state new_state; | |
1800 | int startupp; | |
d758ad8c | 1801 | isc_result_t status; |
5f0c7be1 | 1802 | |
02ca1b45 TL |
1803 | new_state = msg -> server_state; |
1804 | startupp = (msg -> server_flags & FTF_STARTUP) ? 1 : 0; | |
5f0c7be1 | 1805 | |
d07ccee3 TL |
1806 | if (state -> partner.state == new_state && state -> me.state) { |
1807 | switch (state -> me.state) { | |
1808 | case startup: | |
fd273e02 | 1809 | dhcp_failover_set_state (state, state -> saved_state); |
d07ccee3 TL |
1810 | return ISC_R_SUCCESS; |
1811 | ||
1812 | case unknown_state: | |
1813 | case normal: | |
1814 | case potential_conflict: | |
1815 | case recover: | |
1816 | case recover_done: | |
1817 | case shut_down: | |
1818 | case paused: | |
1819 | case recover_wait: | |
1820 | return ISC_R_SUCCESS; | |
1821 | ||
1822 | /* If we get a peer state change when we're | |
1823 | disconnected, we always process it. */ | |
1824 | case partner_down: | |
1825 | case communications_interrupted: | |
1826 | case resolution_interrupted: | |
1827 | break; | |
1828 | } | |
fd273e02 | 1829 | } |
da292833 | 1830 | |
02ca1b45 | 1831 | state -> partner.state = new_state; |
5f0c7be1 TL |
1832 | |
1833 | log_info ("failover peer %s: peer moves from %s to %s", | |
1834 | state -> name, | |
1835 | dhcp_failover_state_name_print (previous_state), | |
02ca1b45 | 1836 | dhcp_failover_state_name_print (state -> partner.state)); |
5f0c7be1 TL |
1837 | |
1838 | if (!write_failover_state (state) || !commit_leases ()) { | |
1839 | /* This is bad, but it's not fatal. Of course, if we | |
1840 | can't write to the lease database, we're not going to | |
1841 | get much done anyway. */ | |
1842 | log_error ("Unable to record current failover state for %s", | |
1843 | state -> name); | |
1844 | } | |
1845 | ||
1846 | /* Do any state transitions that are required as a result of the | |
1847 | peer's state transition. */ | |
1848 | ||
02ca1b45 TL |
1849 | switch (state -> me.state == startup ? |
1850 | state -> saved_state : state -> me.state) { | |
1851 | case startup: /* can't happen. */ | |
1852 | break; | |
1853 | ||
5f0c7be1 TL |
1854 | case normal: |
1855 | switch (new_state) { | |
1856 | case normal: | |
da292833 TL |
1857 | dhcp_failover_state_pool_check (state); |
1858 | break; | |
1859 | ||
02ca1b45 TL |
1860 | case communications_interrupted: |
1861 | break; | |
1862 | ||
01c6e68a TL |
1863 | case partner_down: |
1864 | if (state -> me.state == startup) | |
1865 | dhcp_failover_set_state (state, recover); | |
1866 | else | |
1867 | dhcp_failover_set_state (state, | |
1868 | potential_conflict); | |
1869 | break; | |
1870 | ||
5f0c7be1 | 1871 | case potential_conflict: |
5f0c7be1 | 1872 | case resolution_interrupted: |
da292833 TL |
1873 | /* None of these transitions should ever occur. */ |
1874 | dhcp_failover_set_state (state, shut_down); | |
5f0c7be1 TL |
1875 | break; |
1876 | ||
da292833 TL |
1877 | case recover: |
1878 | dhcp_failover_set_state (state, partner_down); | |
1879 | break; | |
1880 | ||
5f0c7be1 TL |
1881 | case shut_down: |
1882 | /* XXX This one is specified, but it's specified in | |
1883 | XXX the documentation for the shut_down state, | |
1884 | XXX not the normal state. */ | |
1885 | dhcp_failover_set_state (state, partner_down); | |
812022ff | 1886 | break; |
5f0c7be1 TL |
1887 | |
1888 | case paused: | |
1889 | dhcp_failover_set_state (state, | |
1890 | communications_interrupted); | |
1891 | break; | |
1892 | ||
fd273e02 | 1893 | case recover_wait: |
5f0c7be1 | 1894 | case recover_done: |
fd273e02 | 1895 | /* We probably don't need to do anything here. */ |
5f0c7be1 TL |
1896 | break; |
1897 | ||
1898 | case unknown_state: | |
d9539882 | 1899 | case startup: |
5f0c7be1 TL |
1900 | break; |
1901 | } | |
1902 | break; | |
1903 | ||
1904 | case recover: | |
1905 | switch (new_state) { | |
1906 | case recover: | |
755acf88 TL |
1907 | log_info ("failover peer %s: requesting %s", |
1908 | state -> name, "full update from peer"); | |
01c6e68a TL |
1909 | /* Don't send updreqall if we're really in the |
1910 | startup state, because that will result in two | |
1911 | being sent. */ | |
1912 | if (state -> me.state == recover) | |
1913 | dhcp_failover_send_update_request_all (state); | |
5f0c7be1 | 1914 | break; |
da292833 | 1915 | |
5f0c7be1 TL |
1916 | case potential_conflict: |
1917 | case resolution_interrupted: | |
1918 | case normal: | |
1919 | dhcp_failover_set_state (state, potential_conflict); | |
1920 | break; | |
1921 | ||
1922 | case partner_down: | |
1923 | case communications_interrupted: | |
1924 | /* We're supposed to send an update request at this | |
1925 | point. */ | |
1926 | /* XXX we don't currently have code here to do any | |
1927 | XXX clever detection of when we should send an | |
1928 | XXX UPDREQALL message rather than an UPDREQ | |
1929 | XXX message. What to do, what to do? */ | |
1930 | dhcp_failover_send_update_request (state); | |
1931 | break; | |
1932 | ||
1933 | case shut_down: | |
1934 | /* XXX We're not explicitly told what to do in this | |
1935 | XXX case, but this transition is consistent with | |
1936 | XXX what is elsewhere in the draft. */ | |
1937 | dhcp_failover_set_state (state, partner_down); | |
1938 | break; | |
1939 | ||
1940 | /* We can't really do anything in this case. */ | |
1941 | case paused: | |
1942 | break; | |
1943 | ||
da292833 TL |
1944 | /* We should have asked for an update already. */ |
1945 | case recover_done: | |
fd273e02 | 1946 | case recover_wait: |
da292833 TL |
1947 | break; |
1948 | ||
5f0c7be1 | 1949 | case unknown_state: |
d9539882 | 1950 | case startup: |
5f0c7be1 TL |
1951 | break; |
1952 | } | |
1953 | break; | |
1954 | ||
1955 | case potential_conflict: | |
1956 | switch (new_state) { | |
1957 | case normal: | |
1958 | if (previous_state == potential_conflict && | |
1959 | state -> i_am == secondary) | |
1960 | dhcp_failover_send_update_request (state); | |
1961 | break; | |
1962 | ||
5f0c7be1 | 1963 | case recover_done: |
fd273e02 | 1964 | case recover_wait: |
5f0c7be1 TL |
1965 | case potential_conflict: |
1966 | case partner_down: | |
1967 | case communications_interrupted: | |
1968 | case resolution_interrupted: | |
1969 | case paused: | |
1970 | break; | |
1971 | ||
da292833 TL |
1972 | case recover: |
1973 | dhcp_failover_set_state (state, recover); | |
1974 | break; | |
1975 | ||
5f0c7be1 TL |
1976 | case shut_down: |
1977 | dhcp_failover_set_state (state, partner_down); | |
1978 | break; | |
1979 | ||
1980 | case unknown_state: | |
d9539882 | 1981 | case startup: |
5f0c7be1 TL |
1982 | break; |
1983 | } | |
1984 | break; | |
1985 | ||
1986 | case partner_down: | |
1987 | /* Take no action if other server is starting up. */ | |
1988 | if (startupp) | |
1989 | break; | |
1990 | ||
1991 | switch (new_state) { | |
1992 | /* This is where we should be. */ | |
1993 | case recover: | |
2036af06 | 1994 | case recover_wait: |
da292833 TL |
1995 | break; |
1996 | ||
5f0c7be1 | 1997 | case recover_done: |
da292833 | 1998 | dhcp_failover_set_state (state, normal); |
5f0c7be1 TL |
1999 | break; |
2000 | ||
2001 | case normal: | |
2002 | case potential_conflict: | |
2003 | case partner_down: | |
2004 | case communications_interrupted: | |
2005 | case resolution_interrupted: | |
2006 | dhcp_failover_set_state (state, potential_conflict); | |
2007 | break; | |
2008 | ||
2009 | /* These don't change anything. */ | |
2010 | case shut_down: | |
2011 | case paused: | |
2012 | break; | |
2013 | ||
2014 | case unknown_state: | |
d9539882 | 2015 | case startup: |
5f0c7be1 TL |
2016 | break; |
2017 | } | |
2018 | break; | |
2019 | ||
2020 | case communications_interrupted: | |
2021 | switch (new_state) { | |
5f0c7be1 TL |
2022 | case paused: |
2023 | /* Stick with the status quo. */ | |
2024 | break; | |
2025 | ||
da292833 TL |
2026 | /* If we're in communications-interrupted and an |
2027 | amnesiac peer connects, go to the partner_down | |
2028 | state immediately. */ | |
2029 | case recover: | |
2030 | dhcp_failover_set_state (state, partner_down); | |
2031 | break; | |
2032 | ||
5f0c7be1 TL |
2033 | case normal: |
2034 | case communications_interrupted: | |
2035 | case recover_done: | |
fd273e02 | 2036 | case recover_wait: |
5f0c7be1 TL |
2037 | /* XXX so we don't need to do this specially in |
2038 | XXX the CONNECT and CONNECTACK handlers. */ | |
d758ad8c | 2039 | dhcp_failover_send_updates (state); |
5f0c7be1 TL |
2040 | dhcp_failover_set_state (state, normal); |
2041 | break; | |
2042 | ||
2043 | case potential_conflict: | |
2044 | case partner_down: | |
2045 | case resolution_interrupted: | |
2046 | dhcp_failover_set_state (state, potential_conflict); | |
2047 | break; | |
2048 | ||
2049 | case shut_down: | |
2050 | dhcp_failover_set_state (state, partner_down); | |
2051 | break; | |
2052 | ||
2053 | case unknown_state: | |
d9539882 | 2054 | case startup: |
5f0c7be1 TL |
2055 | break; |
2056 | } | |
2057 | break; | |
2058 | ||
2059 | case resolution_interrupted: | |
2060 | switch (new_state) { | |
2061 | case normal: | |
2062 | case recover: | |
2063 | case potential_conflict: | |
2064 | case partner_down: | |
2065 | case communications_interrupted: | |
2066 | case resolution_interrupted: | |
2067 | case recover_done: | |
fd273e02 | 2068 | case recover_wait: |
5f0c7be1 TL |
2069 | dhcp_failover_set_state (state, potential_conflict); |
2070 | break; | |
2071 | ||
2072 | case shut_down: | |
2073 | dhcp_failover_set_state (state, partner_down); | |
2074 | break; | |
2075 | ||
2076 | case paused: | |
2077 | break; | |
2078 | ||
2079 | case unknown_state: | |
d9539882 | 2080 | case startup: |
5f0c7be1 TL |
2081 | break; |
2082 | } | |
2083 | break; | |
2084 | ||
2085 | case recover_done: | |
2086 | switch (new_state) { | |
2087 | case normal: | |
da292833 | 2088 | case recover_done: |
5f0c7be1 TL |
2089 | dhcp_failover_set_state (state, normal); |
2090 | break; | |
2091 | ||
5f0c7be1 TL |
2092 | case potential_conflict: |
2093 | case partner_down: | |
2094 | case communications_interrupted: | |
2095 | case resolution_interrupted: | |
2096 | case paused: | |
fd273e02 TL |
2097 | case recover: |
2098 | case recover_wait: | |
5f0c7be1 TL |
2099 | break; |
2100 | ||
2101 | case shut_down: | |
2102 | dhcp_failover_set_state (state, partner_down); | |
2103 | break; | |
2104 | ||
2105 | case unknown_state: | |
d9539882 | 2106 | case startup: |
5f0c7be1 TL |
2107 | break; |
2108 | } | |
2109 | break; | |
2110 | ||
2111 | /* We are essentially dead in the water when we're in | |
2112 | either shut_down or paused states, and do not do any | |
2113 | automatic state transitions. */ | |
2114 | case shut_down: | |
2115 | case paused: | |
2116 | break; | |
2117 | ||
fd273e02 TL |
2118 | /* We still have to wait... */ |
2119 | case recover_wait: | |
2120 | break; | |
2121 | ||
5f0c7be1 TL |
2122 | case unknown_state: |
2123 | break; | |
2124 | } | |
02ca1b45 TL |
2125 | |
2126 | /* If we didn't make a transition out of startup as a result of | |
2127 | the peer's state change, do it now as a result of the fact that | |
2128 | we got a state change from the peer. */ | |
2129 | if (state -> me.state == startup && state -> saved_state != startup) | |
2130 | dhcp_failover_set_state (state, state -> saved_state); | |
5f0c7be1 TL |
2131 | |
2132 | /* For now, just set the service state based on the peer's state | |
2133 | if necessary. */ | |
2134 | dhcp_failover_set_service_state (state); | |
2135 | ||
2136 | return ISC_R_SUCCESS; | |
2137 | } | |
2138 | ||
8c8e27c5 TL |
2139 | int dhcp_failover_pool_rebalance (dhcp_failover_state_t *state) |
2140 | { | |
2141 | int lts; | |
2142 | int leases_queued = 0; | |
007e3ee4 TL |
2143 | struct lease *lp = (struct lease *)0; |
2144 | struct lease *next = (struct lease *)0; | |
8c8e27c5 TL |
2145 | struct shared_network *s; |
2146 | struct pool *p; | |
007e3ee4 TL |
2147 | int polarity; |
2148 | binding_state_t peer_lease_state; | |
2149 | binding_state_t my_lease_state; | |
2150 | struct lease **lq; | |
8c8e27c5 | 2151 | |
02ca1b45 | 2152 | if (state -> me.state != normal || state -> i_am == secondary) |
8c8e27c5 TL |
2153 | return 0; |
2154 | ||
2155 | for (s = shared_networks; s; s = s -> next) { | |
2156 | for (p = s -> pools; p; p = p -> next) { | |
2157 | if (p -> failover_peer != state) | |
2158 | continue; | |
007e3ee4 TL |
2159 | |
2160 | /* Right now we're giving the peer half of the free leases. | |
2161 | If we have more leases than the peer (i.e., more than | |
2162 | half), then the number of leases we have, less the number | |
2163 | of leases the peer has, will be how many more leases we | |
2164 | have than the peer has. So if we send half that number | |
2165 | to the peer, we should be even. */ | |
2166 | if (p -> failover_peer -> i_am == primary) { | |
2167 | lts = (p -> free_leases - p -> backup_leases) / 2; | |
2168 | peer_lease_state = FTS_BACKUP; | |
2169 | my_lease_state = FTS_FREE; | |
2170 | lq = &p -> free; | |
2171 | } else { | |
2172 | lts = (p -> backup_leases - p -> free_leases) / 2; | |
2173 | peer_lease_state = FTS_FREE; | |
2174 | my_lease_state = FTS_BACKUP; | |
2175 | lq = &p -> backup; | |
2176 | } | |
8c8e27c5 | 2177 | |
d758ad8c TL |
2178 | log_info ("pool %lx total %d free %d backup %d lts %d", |
2179 | (unsigned long)p, p -> lease_count, | |
2180 | p -> free_leases, p -> backup_leases, lts); | |
2181 | ||
8c8e27c5 | 2182 | if (lts > 1) { |
007e3ee4 TL |
2183 | lease_reference (&lp, *lq, MDL); |
2184 | ||
2185 | while (lp && lts) { | |
2186 | /* Remember the next lease in the list. */ | |
2187 | if (next) | |
2188 | lease_dereference (&next, MDL); | |
2189 | if (lp -> next) | |
2190 | lease_reference (&next, lp -> next, MDL); | |
2191 | ||
2192 | --lts; | |
2193 | ++leases_queued; | |
2194 | lp -> next_binding_state = peer_lease_state; | |
2195 | lp -> tstp = cur_time; | |
2196 | lp -> starts = cur_time; | |
0980d1f7 DN |
2197 | |
2198 | if (!supersede_lease (lp, (struct lease *)0, 0, 1, 0) | |
2199 | || !write_lease (lp)) | |
007e3ee4 TL |
2200 | { |
2201 | log_info ("can't commit lease %s on giveaway", | |
2202 | piaddr (lp -> ip_addr)); | |
8c8e27c5 | 2203 | } |
007e3ee4 TL |
2204 | |
2205 | lease_dereference (&lp, MDL); | |
2206 | if (next) | |
2207 | lease_reference (&lp, next, MDL); | |
8c8e27c5 | 2208 | } |
007e3ee4 TL |
2209 | if (next) |
2210 | lease_dereference (&next, MDL); | |
2211 | if (lp) | |
2212 | lease_dereference (&lp, MDL); | |
8c8e27c5 | 2213 | |
007e3ee4 | 2214 | } |
8c8e27c5 TL |
2215 | if (lts > 1) { |
2216 | log_info ("lease imbalance - lts = %d", lts); | |
2217 | leases_queued -= lts; | |
2218 | } | |
2219 | } | |
2220 | } | |
0980d1f7 | 2221 | commit_leases(); |
8c8e27c5 | 2222 | dhcp_failover_send_poolresp (state, leases_queued); |
007e3ee4 | 2223 | dhcp_failover_send_updates (state); |
8c8e27c5 TL |
2224 | return leases_queued; |
2225 | } | |
2226 | ||
2227 | int dhcp_failover_pool_check (struct pool *pool) | |
2228 | { | |
2229 | int lts; | |
2230 | struct lease *lp; | |
2231 | ||
2232 | if (!pool -> failover_peer || | |
2233 | pool -> failover_peer -> i_am == primary || | |
02ca1b45 | 2234 | pool -> failover_peer -> me.state != normal) |
8c8e27c5 TL |
2235 | return 0; |
2236 | ||
007e3ee4 TL |
2237 | if (pool -> failover_peer -> i_am == primary) |
2238 | lts = (pool -> backup_leases - pool -> free_leases) / 2; | |
2239 | else | |
2240 | lts = (pool -> free_leases - pool -> backup_leases) / 2; | |
2241 | ||
2242 | log_info ("pool %lx total %d free %d backup %d lts %d", | |
8c8e27c5 | 2243 | (unsigned long)pool, pool -> lease_count, |
007e3ee4 | 2244 | pool -> free_leases, pool -> backup_leases, lts); |
8c8e27c5 | 2245 | |
8c8e27c5 TL |
2246 | if (lts > 1) { |
2247 | /* XXX What about multiple pools? */ | |
2248 | dhcp_failover_send_poolreq (pool -> failover_peer); | |
2249 | return 1; | |
2250 | } | |
2251 | return 0; | |
2252 | } | |
2253 | ||
2254 | int dhcp_failover_state_pool_check (dhcp_failover_state_t *state) | |
2255 | { | |
2256 | struct lease *lp; | |
2257 | struct shared_network *s; | |
2258 | struct pool *p; | |
2259 | ||
2260 | for (s = shared_networks; s; s = s -> next) { | |
2261 | for (p = s -> pools; p; p = p -> next) { | |
2262 | if (p -> failover_peer != state) | |
2263 | continue; | |
2264 | /* Only need to request rebalance on one pool. */ | |
2265 | if (dhcp_failover_pool_check (p)) | |
2266 | return 1; | |
2267 | } | |
2268 | } | |
2269 | return 0; | |
2270 | } | |
2271 | ||
9f3da356 TL |
2272 | isc_result_t dhcp_failover_send_updates (dhcp_failover_state_t *state) |
2273 | { | |
84fe3bd0 | 2274 | struct lease *lp = (struct lease *)0; |
9f3da356 TL |
2275 | isc_result_t status; |
2276 | ||
8c8e27c5 | 2277 | /* Can't update peer if we're not talking to it! */ |
01c6e68a | 2278 | if (!state -> link_to_peer) |
8c8e27c5 TL |
2279 | return ISC_R_SUCCESS; |
2280 | ||
02ca1b45 TL |
2281 | while ((state -> partner.max_flying_updates > |
2282 | state -> cur_unacked_updates) && state -> update_queue_head) { | |
25a69ca1 | 2283 | /* Grab the head of the update queue. */ |
20916cae | 2284 | lease_reference (&lp, state -> update_queue_head, MDL); |
84fe3bd0 TL |
2285 | |
2286 | /* Send the update to the peer. */ | |
2287 | status = dhcp_failover_send_bind_update (state, lp); | |
2288 | if (status != ISC_R_SUCCESS) { | |
20916cae | 2289 | lease_dereference (&lp, MDL); |
84fe3bd0 TL |
2290 | return status; |
2291 | } | |
25a69ca1 | 2292 | lp -> flags &= ~ON_UPDATE_QUEUE; |
84fe3bd0 | 2293 | |
25a69ca1 TL |
2294 | /* Take it off the head of the update queue and put the next |
2295 | item in the update queue at the head. */ | |
20916cae | 2296 | lease_dereference (&state -> update_queue_head, MDL); |
9f3da356 | 2297 | if (lp -> next_pending) { |
20916cae TL |
2298 | lease_reference (&state -> update_queue_head, |
2299 | lp -> next_pending, MDL); | |
2300 | lease_dereference (&lp -> next_pending, MDL); | |
9f3da356 | 2301 | } else { |
20916cae | 2302 | lease_dereference (&state -> update_queue_tail, MDL); |
9f3da356 | 2303 | } |
84fe3bd0 | 2304 | |
9f3da356 | 2305 | if (state -> ack_queue_head) { |
20916cae TL |
2306 | lease_reference |
2307 | (&state -> ack_queue_tail -> next_pending, | |
2308 | lp, MDL); | |
2309 | lease_dereference (&state -> ack_queue_tail, MDL); | |
9f3da356 | 2310 | } else { |
20916cae | 2311 | lease_reference (&state -> ack_queue_head, lp, MDL); |
9f3da356 | 2312 | } |
da292833 TL |
2313 | #if defined (POINTER_DEBUG) |
2314 | if (lp -> next_pending) { | |
2315 | log_error ("ack_queue_tail: lp -> next_pending"); | |
2316 | abort (); | |
2317 | } | |
2318 | #endif | |
20916cae | 2319 | lease_reference (&state -> ack_queue_tail, lp, MDL); |
25a69ca1 | 2320 | lp -> flags |= ON_ACK_QUEUE; |
20916cae | 2321 | lease_dereference (&lp, MDL); |
9f3da356 TL |
2322 | |
2323 | /* Count the object as an unacked update. */ | |
2324 | state -> cur_unacked_updates++; | |
2325 | } | |
2326 | return ISC_R_SUCCESS; | |
2327 | } | |
2328 | ||
2329 | /* Queue an update for a lease. Always returns 1 at this point - it's | |
2330 | not an error for this to be called on a lease for which there's no | |
2331 | failover peer. */ | |
2332 | ||
007e3ee4 | 2333 | int dhcp_failover_queue_update (struct lease *lease, int immediate) |
9f3da356 TL |
2334 | { |
2335 | dhcp_failover_state_t *state; | |
2336 | ||
2337 | if (!lease -> pool || | |
2338 | !lease -> pool -> failover_peer) | |
2339 | return 1; | |
2340 | ||
25a69ca1 TL |
2341 | /* If it's already on the update queue, leave it there. */ |
2342 | if (lease -> flags & ON_UPDATE_QUEUE) | |
2343 | return 1; | |
2344 | ||
2345 | /* Get the failover state structure for this lease. */ | |
9f3da356 | 2346 | state = lease -> pool -> failover_peer; |
25a69ca1 TL |
2347 | |
2348 | /* If it's on the ack queue, take it off. */ | |
2349 | if (lease -> flags & ON_ACK_QUEUE) | |
2350 | dhcp_failover_ack_queue_remove (state, lease); | |
2351 | ||
9f3da356 | 2352 | if (state -> update_queue_head) { |
20916cae TL |
2353 | lease_reference (&state -> update_queue_tail -> next_pending, |
2354 | lease, MDL); | |
2355 | lease_dereference (&state -> update_queue_tail, MDL); | |
9f3da356 | 2356 | } else { |
20916cae | 2357 | lease_reference (&state -> update_queue_head, lease, MDL); |
9f3da356 | 2358 | } |
294d641e | 2359 | #if defined (POINTER_DEBUG) |
da292833 TL |
2360 | if (lease -> next_pending) { |
2361 | log_error ("next pending on update queue lease."); | |
755acf88 | 2362 | #if defined (DEBUG_RC_HISTORY) |
d758ad8c | 2363 | dump_rc_history (lease); |
755acf88 | 2364 | #endif |
da292833 TL |
2365 | abort (); |
2366 | } | |
294d641e | 2367 | #endif |
20916cae | 2368 | lease_reference (&state -> update_queue_tail, lease, MDL); |
25a69ca1 | 2369 | lease -> flags |= ON_UPDATE_QUEUE; |
007e3ee4 TL |
2370 | if (immediate) |
2371 | dhcp_failover_send_updates (state); | |
9f3da356 TL |
2372 | return 1; |
2373 | } | |
2374 | ||
12fd6075 TL |
2375 | int dhcp_failover_send_acks (dhcp_failover_state_t *state) |
2376 | { | |
988c1ca7 DN |
2377 | failover_message_t *msg = (failover_message_t *)0; |
2378 | ||
2379 | /* Must commit all leases prior to acking them. */ | |
2380 | if (!commit_leases ()) | |
2381 | return 0; | |
2382 | ||
2383 | while (state -> toack_queue_head) { | |
2384 | failover_message_reference | |
2385 | (&msg, state -> toack_queue_head, MDL); | |
2386 | failover_message_dereference | |
2387 | (&state -> toack_queue_head, MDL); | |
2388 | if (msg -> next) { | |
2389 | failover_message_reference | |
2390 | (&state -> toack_queue_head, msg -> next, MDL); | |
2391 | } | |
2392 | ||
2393 | dhcp_failover_send_bind_ack (state, msg, 0, (const char *)0); | |
2394 | ||
2395 | failover_message_dereference (&msg, MDL); | |
2396 | } | |
2397 | ||
fa0b4709 BC |
2398 | if (state -> toack_queue_tail) |
2399 | failover_message_dereference (&state -> toack_queue_tail, MDL); | |
988c1ca7 DN |
2400 | state -> pending_acks = 0; |
2401 | ||
2402 | return 1; | |
2403 | } | |
2404 | ||
12fd6075 TL |
2405 | void dhcp_failover_toack_queue_timeout (void *vs) |
2406 | { | |
988c1ca7 | 2407 | dhcp_failover_state_t *state = vs; |
0db87765 TL |
2408 | |
2409 | #if defined (DEBUG_FAILOVER_TIMING) | |
2410 | log_info ("dhcp_failover_toack_queue_timeout"); | |
2411 | #endif | |
2412 | ||
988c1ca7 DN |
2413 | dhcp_failover_send_acks (state); |
2414 | } | |
2415 | ||
2416 | /* Queue an ack for a message. There is currently no way to queue a | |
2417 | negative ack -- these need to be sent directly. */ | |
2418 | ||
2419 | int dhcp_failover_queue_ack (dhcp_failover_state_t *state, | |
2420 | failover_message_t *msg) | |
2421 | { | |
2422 | if (state -> toack_queue_head) { | |
2423 | failover_message_reference | |
2424 | (&state -> toack_queue_tail -> next, msg, MDL); | |
2425 | failover_message_dereference (&state -> toack_queue_tail, MDL); | |
2426 | } else { | |
2427 | failover_message_reference (&state -> toack_queue_head, | |
2428 | msg, MDL); | |
2429 | } | |
2430 | failover_message_reference (&state -> toack_queue_tail, msg, MDL); | |
2431 | ||
2432 | state -> pending_acks++; | |
2433 | ||
2434 | /* Flush the toack queue whenever we exceed half the number of | |
2435 | allowed unacked updates. */ | |
2436 | if (state -> pending_acks >= state -> partner.max_flying_updates / 2) { | |
2437 | dhcp_failover_send_acks (state); | |
2438 | } | |
2439 | ||
2440 | /* Schedule a timeout to flush the ack queue. */ | |
2441 | if (state -> pending_acks > 0) { | |
0db87765 TL |
2442 | #if defined (DEBUG_FAILOVER_TIMING) |
2443 | log_info ("add_timeout +2 %s", | |
2444 | "dhcp_failover_toack_queue_timeout"); | |
2445 | #endif | |
988c1ca7 DN |
2446 | add_timeout (cur_time + 2, |
2447 | dhcp_failover_toack_queue_timeout, state, | |
2448 | (tvref_t)dhcp_failover_state_reference, | |
2449 | (tvunref_t)dhcp_failover_state_dereference); | |
2450 | } | |
2451 | ||
988c1ca7 DN |
2452 | return 1; |
2453 | } | |
2454 | ||
25a69ca1 TL |
2455 | void dhcp_failover_ack_queue_remove (dhcp_failover_state_t *state, |
2456 | struct lease *lease) | |
2457 | { | |
2458 | struct lease *lp; | |
2459 | ||
999992c9 TL |
2460 | if (!(lease -> flags & ON_ACK_QUEUE)) |
2461 | return; | |
2462 | ||
25a69ca1 | 2463 | if (state -> ack_queue_head == lease) { |
20916cae | 2464 | lease_dereference (&state -> ack_queue_head, MDL); |
25a69ca1 | 2465 | if (lease -> next_pending) { |
20916cae TL |
2466 | lease_reference (&state -> ack_queue_head, |
2467 | lease -> next_pending, MDL); | |
6f0b9ed0 | 2468 | lease_dereference (&lease -> next_pending, MDL); |
25a69ca1 | 2469 | } else { |
20916cae | 2470 | lease_dereference (&state -> ack_queue_tail, MDL); |
25a69ca1 | 2471 | } |
988c1ca7 DN |
2472 | } else { |
2473 | for (lp = state -> ack_queue_head; | |
2474 | lp && lp -> next_pending != lease; | |
2475 | lp = lp -> next_pending) | |
2476 | ; | |
2477 | ||
2478 | if (!lp) | |
2479 | return; | |
2480 | ||
20916cae | 2481 | lease_dereference (&lp -> next_pending, MDL); |
6f0b9ed0 | 2482 | if (lease -> next_pending) { |
20916cae TL |
2483 | lease_reference (&lp -> next_pending, |
2484 | lease -> next_pending, MDL); | |
6f0b9ed0 TL |
2485 | lease_dereference (&lease -> next_pending, MDL); |
2486 | } else { | |
20916cae | 2487 | lease_dereference (&state -> ack_queue_tail, MDL); |
da292833 TL |
2488 | if (lp -> next_pending) { |
2489 | log_error ("state -> ack_queue_tail"); | |
2490 | abort (); | |
2491 | } | |
20916cae | 2492 | lease_reference (&state -> ack_queue_tail, lp, MDL); |
25a69ca1 TL |
2493 | } |
2494 | } | |
988c1ca7 | 2495 | |
25a69ca1 | 2496 | lease -> flags &= ~ON_ACK_QUEUE; |
6f0b9ed0 | 2497 | state -> cur_unacked_updates--; |
988c1ca7 DN |
2498 | |
2499 | /* | |
2500 | * When updating leases as a result of an ack, we defer the commit | |
2501 | * for performance reasons. When there are no more acks pending, | |
2502 | * do a commit. | |
2503 | */ | |
2504 | if (state -> cur_unacked_updates == 0) { | |
2505 | commit_leases(); | |
2506 | } | |
25a69ca1 TL |
2507 | } |
2508 | ||
d50d0b82 | 2509 | isc_result_t dhcp_failover_state_set_value (omapi_object_t *h, |
85a53735 TL |
2510 | omapi_object_t *id, |
2511 | omapi_data_string_t *name, | |
2512 | omapi_typed_data_t *value) | |
d50d0b82 | 2513 | { |
311dbab6 DN |
2514 | isc_result_t status; |
2515 | ||
d50d0b82 TL |
2516 | if (h -> type != dhcp_type_failover_state) |
2517 | return ISC_R_INVALIDARG; | |
311dbab6 DN |
2518 | |
2519 | /* This list of successful returns is completely wrong, but the | |
2520 | fastest way to make dhcpctl do something vaguely sane when | |
2521 | you try to change the local state. */ | |
2522 | ||
2523 | if (!omapi_ds_strcmp (name, "name")) { | |
2524 | return ISC_R_SUCCESS; | |
311dbab6 DN |
2525 | } else if (!omapi_ds_strcmp (name, "partner-address")) { |
2526 | return ISC_R_SUCCESS; | |
2527 | } else if (!omapi_ds_strcmp (name, "local-address")) { | |
2528 | return ISC_R_SUCCESS; | |
2529 | } else if (!omapi_ds_strcmp (name, "partner-port")) { | |
2530 | return ISC_R_SUCCESS; | |
2531 | } else if (!omapi_ds_strcmp (name, "local-port")) { | |
2532 | return ISC_R_SUCCESS; | |
2533 | } else if (!omapi_ds_strcmp (name, "max-outstanding-updates")) { | |
2534 | return ISC_R_SUCCESS; | |
2535 | } else if (!omapi_ds_strcmp (name, "mclt")) { | |
2536 | return ISC_R_SUCCESS; | |
2537 | } else if (!omapi_ds_strcmp (name, "load-balance-max-secs")) { | |
2538 | return ISC_R_SUCCESS; | |
2539 | } else if (!omapi_ds_strcmp (name, "load-balance-hba")) { | |
2540 | return ISC_R_SUCCESS; | |
2541 | } else if (!omapi_ds_strcmp (name, "partner-state")) { | |
2542 | return ISC_R_SUCCESS; | |
2543 | } else if (!omapi_ds_strcmp (name, "local-state")) { | |
7c6a9da0 | 2544 | unsigned long l; |
311dbab6 DN |
2545 | status = omapi_get_int_value (&l, value); |
2546 | if (status != ISC_R_SUCCESS) | |
2547 | return status; | |
2548 | return dhcp_failover_set_state ((dhcp_failover_state_t *)h, l); | |
2549 | } else if (!omapi_ds_strcmp (name, "partner-stos")) { | |
2550 | return ISC_R_SUCCESS; | |
2551 | } else if (!omapi_ds_strcmp (name, "local-stos")) { | |
2552 | return ISC_R_SUCCESS; | |
2553 | } else if (!omapi_ds_strcmp (name, "hierarchy")) { | |
2554 | return ISC_R_SUCCESS; | |
2555 | } else if (!omapi_ds_strcmp (name, "last-packet-sent")) { | |
2556 | return ISC_R_SUCCESS; | |
2557 | } else if (!omapi_ds_strcmp (name, "last-timestamp-received")) { | |
2558 | return ISC_R_SUCCESS; | |
2559 | } else if (!omapi_ds_strcmp (name, "skew")) { | |
2560 | return ISC_R_SUCCESS; | |
2561 | } else if (!omapi_ds_strcmp (name, "max-response-delay")) { | |
2562 | return ISC_R_SUCCESS; | |
2563 | } else if (!omapi_ds_strcmp (name, "cur-unacked-updates")) { | |
2564 | return ISC_R_SUCCESS; | |
2565 | } | |
2566 | ||
d50d0b82 TL |
2567 | if (h -> inner && h -> inner -> type -> set_value) |
2568 | return (*(h -> inner -> type -> set_value)) | |
2569 | (h -> inner, id, name, value); | |
2570 | return ISC_R_NOTFOUND; | |
2571 | } | |
2572 | ||
85a53735 TL |
2573 | void dhcp_failover_keepalive (void *vs) |
2574 | { | |
2575 | dhcp_failover_state_t *state = vs; | |
2576 | } | |
2577 | ||
9f3da356 TL |
2578 | void dhcp_failover_reconnect (void *vs) |
2579 | { | |
2580 | dhcp_failover_state_t *state = vs; | |
2581 | isc_result_t status; | |
2582 | ||
0db87765 TL |
2583 | #if defined (DEBUG_FAILOVER_TIMING) |
2584 | log_info ("dhcp_failover_reconnect"); | |
2585 | #endif | |
da292833 TL |
2586 | /* If we already connected the other way, let the connection |
2587 | recovery code initiate any retry that may be required. */ | |
2588 | if (state -> link_to_peer) | |
2589 | return; | |
2590 | ||
9f3da356 | 2591 | status = dhcp_failover_link_initiate ((omapi_object_t *)state); |
f67a7be5 | 2592 | if (status != ISC_R_SUCCESS && status != ISC_R_INCOMPLETE) { |
9f3da356 TL |
2593 | log_info ("failover peer %s: %s", state -> name, |
2594 | isc_result_totext (status)); | |
0db87765 TL |
2595 | #if defined (DEBUG_FAILOVER_TIMING) |
2596 | log_info ("add_timeout +90 %s", | |
2597 | "dhcp_failover_listener_restart"); | |
2598 | #endif | |
9f3da356 | 2599 | add_timeout (cur_time + 90, |
20916cae TL |
2600 | dhcp_failover_listener_restart, state, |
2601 | (tvref_t)dhcp_failover_state_reference, | |
2602 | (tvunref_t)dhcp_failover_state_dereference); | |
9f3da356 TL |
2603 | } |
2604 | } | |
2605 | ||
5f0c7be1 TL |
2606 | void dhcp_failover_startup_timeout (void *vs) |
2607 | { | |
2608 | dhcp_failover_state_t *state = vs; | |
2609 | isc_result_t status; | |
2610 | ||
0db87765 TL |
2611 | #if defined (DEBUG_FAILOVER_TIMING) |
2612 | log_info ("dhcp_failover_startup_timeout"); | |
2613 | #endif | |
2614 | ||
02ca1b45 TL |
2615 | dhcp_failover_state_transition (state, "disconnect"); |
2616 | } | |
2617 | ||
2618 | void dhcp_failover_link_startup_timeout (void *vl) | |
2619 | { | |
2620 | dhcp_failover_link_t *link = vl; | |
2621 | isc_result_t status; | |
2622 | omapi_object_t *p; | |
2623 | ||
2624 | for (p = (omapi_object_t *)link; p -> inner; p = p -> inner) | |
2625 | ; | |
2626 | for (; p; p = p -> outer) | |
2627 | if (p -> type == omapi_type_connection) | |
2628 | break; | |
2629 | if (p) { | |
da292833 | 2630 | log_info ("failover: link startup timeout"); |
02ca1b45 TL |
2631 | omapi_disconnect (p, 1); |
2632 | } | |
5f0c7be1 TL |
2633 | } |
2634 | ||
9f3da356 TL |
2635 | void dhcp_failover_listener_restart (void *vs) |
2636 | { | |
2637 | dhcp_failover_state_t *state = vs; | |
2638 | isc_result_t status; | |
2639 | ||
0db87765 TL |
2640 | #if defined (DEBUG_FAILOVER_TIMING) |
2641 | log_info ("dhcp_failover_listener_restart"); | |
2642 | #endif | |
2643 | ||
9f3da356 TL |
2644 | status = dhcp_failover_listen ((omapi_object_t *)state); |
2645 | if (status != ISC_R_SUCCESS) { | |
2646 | log_info ("failover peer %s: %s", state -> name, | |
2647 | isc_result_totext (status)); | |
0db87765 TL |
2648 | #if defined (DEBUG_FAILOVER_TIMING) |
2649 | log_info ("add_timeout +90 %s", | |
2650 | "dhcp_failover_listener_restart"); | |
2651 | #endif | |
9f3da356 | 2652 | add_timeout (cur_time + 90, |
20916cae TL |
2653 | dhcp_failover_listener_restart, state, |
2654 | (tvref_t)dhcp_failover_state_reference, | |
2655 | (tvunref_t)dhcp_failover_state_dereference); | |
9f3da356 TL |
2656 | } |
2657 | } | |
2658 | ||
d50d0b82 | 2659 | isc_result_t dhcp_failover_state_get_value (omapi_object_t *h, |
85a53735 TL |
2660 | omapi_object_t *id, |
2661 | omapi_data_string_t *name, | |
2662 | omapi_value_t **value) | |
d50d0b82 | 2663 | { |
85a53735 TL |
2664 | dhcp_failover_state_t *s; |
2665 | struct option_cache *oc; | |
2666 | struct data_string ds; | |
2667 | isc_result_t status; | |
2668 | ||
d50d0b82 TL |
2669 | if (h -> type != dhcp_type_failover_state) |
2670 | return ISC_R_INVALIDARG; | |
85a53735 | 2671 | s = (dhcp_failover_state_t *)h; |
d50d0b82 | 2672 | |
85a53735 TL |
2673 | if (!omapi_ds_strcmp (name, "name")) { |
2674 | if (s -> name) | |
2675 | return omapi_make_string_value (value, | |
2676 | name, s -> name, MDL); | |
2677 | return ISC_R_NOTFOUND; | |
2678 | } else if (!omapi_ds_strcmp (name, "partner-address")) { | |
02ca1b45 | 2679 | oc = s -> partner.address; |
85a53735 TL |
2680 | getaddr: |
2681 | memset (&ds, 0, sizeof ds); | |
2682 | if (!evaluate_option_cache (&ds, (struct packet *)0, | |
2683 | (struct lease *)0, | |
9e383163 | 2684 | (struct client_state *)0, |
85a53735 TL |
2685 | (struct option_state *)0, |
2686 | (struct option_state *)0, | |
2687 | &global_scope, oc, MDL)) { | |
2688 | return ISC_R_NOTFOUND; | |
2689 | } | |
2690 | status = omapi_make_const_value (value, | |
2691 | name, ds.data, ds.len, MDL); | |
9f3da356 | 2692 | /* Disgusting kludge: */ |
02ca1b45 | 2693 | if (oc == s -> me.address && !s -> server_identifier.len) |
9f3da356 | 2694 | data_string_copy (&s -> server_identifier, &ds, MDL); |
85a53735 TL |
2695 | data_string_forget (&ds, MDL); |
2696 | return status; | |
2697 | } else if (!omapi_ds_strcmp (name, "local-address")) { | |
02ca1b45 | 2698 | oc = s -> me.address; |
85a53735 TL |
2699 | goto getaddr; |
2700 | } else if (!omapi_ds_strcmp (name, "partner-port")) { | |
02ca1b45 TL |
2701 | return omapi_make_int_value (value, name, |
2702 | s -> partner.port, MDL); | |
85a53735 TL |
2703 | } else if (!omapi_ds_strcmp (name, "local-port")) { |
2704 | return omapi_make_int_value (value, | |
02ca1b45 | 2705 | name, s -> me.port, MDL); |
85a53735 TL |
2706 | } else if (!omapi_ds_strcmp (name, "max-outstanding-updates")) { |
2707 | return omapi_make_uint_value (value, name, | |
02ca1b45 TL |
2708 | s -> me.max_flying_updates, |
2709 | MDL); | |
85a53735 TL |
2710 | } else if (!omapi_ds_strcmp (name, "mclt")) { |
2711 | return omapi_make_uint_value (value, name, s -> mclt, MDL); | |
2712 | } else if (!omapi_ds_strcmp (name, "load-balance-max-secs")) { | |
2713 | return omapi_make_int_value (value, name, | |
2714 | s -> load_balance_max_secs, MDL); | |
2715 | } else if (!omapi_ds_strcmp (name, "load-balance-hba")) { | |
2716 | if (s -> hba) | |
2717 | return omapi_make_const_value (value, name, | |
2718 | s -> hba, 32, MDL); | |
2719 | return ISC_R_NOTFOUND; | |
2720 | } else if (!omapi_ds_strcmp (name, "partner-state")) { | |
2721 | return omapi_make_uint_value (value, name, | |
02ca1b45 | 2722 | s -> partner.state, MDL); |
85a53735 TL |
2723 | } else if (!omapi_ds_strcmp (name, "local-state")) { |
2724 | return omapi_make_uint_value (value, name, | |
02ca1b45 | 2725 | s -> me.state, MDL); |
85a53735 TL |
2726 | } else if (!omapi_ds_strcmp (name, "partner-stos")) { |
2727 | return omapi_make_int_value (value, name, | |
02ca1b45 | 2728 | s -> partner.stos, MDL); |
85a53735 TL |
2729 | } else if (!omapi_ds_strcmp (name, "local-stos")) { |
2730 | return omapi_make_int_value (value, name, | |
02ca1b45 | 2731 | s -> me.stos, MDL); |
85a53735 TL |
2732 | } else if (!omapi_ds_strcmp (name, "hierarchy")) { |
2733 | return omapi_make_uint_value (value, name, s -> i_am, MDL); | |
2734 | } else if (!omapi_ds_strcmp (name, "last-packet-sent")) { | |
2735 | return omapi_make_int_value (value, name, | |
2736 | s -> last_packet_sent, MDL); | |
2737 | } else if (!omapi_ds_strcmp (name, "last-timestamp-received")) { | |
2738 | return omapi_make_int_value (value, name, | |
2739 | s -> last_timestamp_received, | |
2740 | MDL); | |
2741 | } else if (!omapi_ds_strcmp (name, "skew")) { | |
2742 | return omapi_make_int_value (value, name, s -> skew, MDL); | |
85a53735 TL |
2743 | } else if (!omapi_ds_strcmp (name, "max-response-delay")) { |
2744 | return omapi_make_uint_value (value, name, | |
02ca1b45 TL |
2745 | s -> me.max_response_delay, |
2746 | MDL); | |
85a53735 TL |
2747 | } else if (!omapi_ds_strcmp (name, "cur-unacked-updates")) { |
2748 | return omapi_make_int_value (value, name, | |
2749 | s -> cur_unacked_updates, MDL); | |
2750 | } | |
2751 | ||
d50d0b82 TL |
2752 | if (h -> inner && h -> inner -> type -> get_value) |
2753 | return (*(h -> inner -> type -> get_value)) | |
2754 | (h -> inner, id, name, value); | |
2755 | return ISC_R_NOTFOUND; | |
2756 | } | |
2757 | ||
2758 | isc_result_t dhcp_failover_state_destroy (omapi_object_t *h, | |
4bd8800e | 2759 | const char *file, int line) |
d50d0b82 | 2760 | { |
85a53735 TL |
2761 | dhcp_failover_state_t *s; |
2762 | ||
d50d0b82 TL |
2763 | if (h -> type != dhcp_type_failover_state) |
2764 | return ISC_R_INVALIDARG; | |
85a53735 | 2765 | s = (dhcp_failover_state_t *)h; |
d758ad8c | 2766 | |
85a53735 | 2767 | if (s -> link_to_peer) |
d758ad8c TL |
2768 | dhcp_failover_link_dereference (&s -> link_to_peer, file, line); |
2769 | if (s -> name) { | |
85a53735 | 2770 | dfree (s -> name, MDL); |
d758ad8c TL |
2771 | s -> name = (char *)0; |
2772 | } | |
02ca1b45 | 2773 | if (s -> partner.address) |
d758ad8c | 2774 | option_cache_dereference (&s -> partner.address, file, line); |
02ca1b45 | 2775 | if (s -> me.address) |
d758ad8c TL |
2776 | option_cache_dereference (&s -> me.address, file, line); |
2777 | if (s -> hba) { | |
2778 | dfree (s -> hba, file, line); | |
2779 | s -> hba = (u_int8_t *)0; | |
2780 | } | |
2781 | if (s -> update_queue_head) | |
2782 | lease_dereference (&s -> update_queue_head, file, line); | |
2783 | if (s -> update_queue_tail) | |
2784 | lease_dereference (&s -> update_queue_tail, file, line); | |
2785 | if (s -> ack_queue_head) | |
2786 | lease_dereference (&s -> ack_queue_head, file, line); | |
2787 | if (s -> ack_queue_tail) | |
2788 | lease_dereference (&s -> ack_queue_tail, file, line); | |
2789 | if (s -> send_update_done) | |
2790 | lease_dereference (&s -> send_update_done, file, line); | |
2791 | if (s -> toack_queue_head) | |
2792 | failover_message_dereference (&s -> toack_queue_head, | |
2793 | file, line); | |
2794 | if (s -> toack_queue_tail) | |
2795 | failover_message_dereference (&s -> toack_queue_tail, | |
2796 | file, line); | |
d50d0b82 TL |
2797 | return ISC_R_SUCCESS; |
2798 | } | |
2799 | ||
2800 | /* Write all the published values associated with the object through the | |
2801 | specified connection. */ | |
2802 | ||
2803 | isc_result_t dhcp_failover_state_stuff (omapi_object_t *c, | |
d8a417b2 | 2804 | omapi_object_t *id, |
85a53735 | 2805 | omapi_object_t *h) |
d50d0b82 | 2806 | { |
85a53735 TL |
2807 | dhcp_failover_state_t *s; |
2808 | omapi_connection_object_t *conn; | |
2809 | isc_result_t status; | |
d50d0b82 | 2810 | |
85a53735 | 2811 | if (c -> type != omapi_type_connection) |
d50d0b82 | 2812 | return ISC_R_INVALIDARG; |
85a53735 | 2813 | conn = (omapi_connection_object_t *)c; |
d50d0b82 | 2814 | |
85a53735 TL |
2815 | if (h -> type != dhcp_type_failover_state) |
2816 | return ISC_R_INVALIDARG; | |
2817 | s = (dhcp_failover_state_t *)h; | |
2818 | ||
2819 | status = omapi_connection_put_name (c, "name"); | |
2820 | if (status != ISC_R_SUCCESS) | |
2821 | return status; | |
2822 | status = omapi_connection_put_string (c, s -> name); | |
2823 | if (status != ISC_R_SUCCESS) | |
2824 | return status; | |
2825 | ||
2826 | status = omapi_connection_put_name (c, "partner-address"); | |
2827 | if (status != ISC_R_SUCCESS) | |
2828 | return status; | |
02ca1b45 | 2829 | status = omapi_connection_put_uint32 (c, sizeof s -> partner.address); |
85a53735 TL |
2830 | if (status != ISC_R_SUCCESS) |
2831 | return status; | |
02ca1b45 TL |
2832 | status = omapi_connection_copyin (c, (u_int8_t *)&s -> partner.address, |
2833 | sizeof s -> partner.address); | |
85a53735 TL |
2834 | if (status != ISC_R_SUCCESS) |
2835 | return status; | |
2836 | ||
2837 | status = omapi_connection_put_name (c, "partner-port"); | |
2838 | if (status != ISC_R_SUCCESS) | |
2839 | return status; | |
2840 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2841 | if (status != ISC_R_SUCCESS) | |
2842 | return status; | |
02ca1b45 | 2843 | status = omapi_connection_put_uint32 (c, (u_int32_t)s -> partner.port); |
85a53735 TL |
2844 | if (status != ISC_R_SUCCESS) |
2845 | return status; | |
2846 | ||
2847 | status = omapi_connection_put_name (c, "local-address"); | |
2848 | if (status != ISC_R_SUCCESS) | |
2849 | return status; | |
02ca1b45 | 2850 | status = omapi_connection_put_uint32 (c, sizeof s -> me.address); |
85a53735 TL |
2851 | if (status != ISC_R_SUCCESS) |
2852 | return status; | |
02ca1b45 TL |
2853 | status = omapi_connection_copyin (c, (u_int8_t *)&s -> me.address, |
2854 | sizeof s -> me.address); | |
85a53735 TL |
2855 | if (status != ISC_R_SUCCESS) |
2856 | return status; | |
2857 | ||
2858 | status = omapi_connection_put_name (c, "local-port"); | |
2859 | if (status != ISC_R_SUCCESS) | |
2860 | return status; | |
2861 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2862 | if (status != ISC_R_SUCCESS) | |
2863 | return status; | |
02ca1b45 | 2864 | status = omapi_connection_put_uint32 (c, (u_int32_t)s -> me.port); |
85a53735 TL |
2865 | if (status != ISC_R_SUCCESS) |
2866 | return status; | |
2867 | ||
2868 | status = omapi_connection_put_name (c, "max-outstanding-updates"); | |
2869 | if (status != ISC_R_SUCCESS) | |
2870 | return status; | |
2871 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2872 | if (status != ISC_R_SUCCESS) | |
2873 | return status; | |
02ca1b45 TL |
2874 | status = omapi_connection_put_uint32 (c, |
2875 | s -> me.max_flying_updates); | |
85a53735 TL |
2876 | if (status != ISC_R_SUCCESS) |
2877 | return status; | |
2878 | ||
2879 | status = omapi_connection_put_name (c, "mclt"); | |
2880 | if (status != ISC_R_SUCCESS) | |
2881 | return status; | |
2882 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2883 | if (status != ISC_R_SUCCESS) | |
2884 | return status; | |
2885 | status = omapi_connection_put_uint32 (c, s -> mclt); | |
2886 | if (status != ISC_R_SUCCESS) | |
2887 | return status; | |
2888 | ||
2889 | status = omapi_connection_put_name (c, "load-balance-max-secs"); | |
2890 | if (status != ISC_R_SUCCESS) | |
2891 | return status; | |
2892 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2893 | if (status != ISC_R_SUCCESS) | |
2894 | return status; | |
2895 | status = (omapi_connection_put_uint32 | |
2896 | (c, (u_int32_t)s -> load_balance_max_secs)); | |
2897 | if (status != ISC_R_SUCCESS) | |
2898 | return status; | |
2899 | ||
2900 | ||
2901 | if (s -> hba) { | |
2902 | status = omapi_connection_put_name (c, "load-balance-hba"); | |
2903 | if (status != ISC_R_SUCCESS) | |
2904 | return status; | |
2905 | status = omapi_connection_put_uint32 (c, 32); | |
2906 | if (status != ISC_R_SUCCESS) | |
2907 | return status; | |
2908 | status = omapi_connection_copyin (c, s -> hba, 32); | |
2909 | if (status != ISC_R_SUCCESS) | |
2910 | return status; | |
2911 | } | |
2912 | ||
2913 | status = omapi_connection_put_name (c, "partner-state"); | |
2914 | if (status != ISC_R_SUCCESS) | |
2915 | return status; | |
2916 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2917 | if (status != ISC_R_SUCCESS) | |
2918 | return status; | |
02ca1b45 | 2919 | status = omapi_connection_put_uint32 (c, s -> partner.state); |
85a53735 TL |
2920 | if (status != ISC_R_SUCCESS) |
2921 | return status; | |
2922 | ||
2923 | status = omapi_connection_put_name (c, "local-state"); | |
2924 | if (status != ISC_R_SUCCESS) | |
2925 | return status; | |
2926 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2927 | if (status != ISC_R_SUCCESS) | |
2928 | return status; | |
02ca1b45 | 2929 | status = omapi_connection_put_uint32 (c, s -> me.state); |
85a53735 TL |
2930 | if (status != ISC_R_SUCCESS) |
2931 | return status; | |
2932 | ||
2933 | status = omapi_connection_put_name (c, "partner-stos"); | |
2934 | if (status != ISC_R_SUCCESS) | |
2935 | return status; | |
2936 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2937 | if (status != ISC_R_SUCCESS) | |
2938 | return status; | |
02ca1b45 TL |
2939 | status = omapi_connection_put_uint32 (c, |
2940 | (u_int32_t)s -> partner.stos); | |
85a53735 TL |
2941 | if (status != ISC_R_SUCCESS) |
2942 | return status; | |
2943 | ||
2944 | status = omapi_connection_put_name (c, "local-stos"); | |
2945 | if (status != ISC_R_SUCCESS) | |
2946 | return status; | |
2947 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2948 | if (status != ISC_R_SUCCESS) | |
2949 | return status; | |
02ca1b45 | 2950 | status = omapi_connection_put_uint32 (c, (u_int32_t)s -> me.stos); |
85a53735 TL |
2951 | if (status != ISC_R_SUCCESS) |
2952 | return status; | |
2953 | ||
2954 | status = omapi_connection_put_name (c, "hierarchy"); | |
2955 | if (status != ISC_R_SUCCESS) | |
2956 | return status; | |
2957 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2958 | if (status != ISC_R_SUCCESS) | |
2959 | return status; | |
2960 | status = omapi_connection_put_uint32 (c, s -> i_am); | |
2961 | if (status != ISC_R_SUCCESS) | |
2962 | return status; | |
2963 | ||
2964 | status = omapi_connection_put_name (c, "last-packet-sent"); | |
2965 | if (status != ISC_R_SUCCESS) | |
2966 | return status; | |
2967 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2968 | if (status != ISC_R_SUCCESS) | |
2969 | return status; | |
2970 | status = (omapi_connection_put_uint32 | |
2971 | (c, (u_int32_t)s -> last_packet_sent)); | |
2972 | if (status != ISC_R_SUCCESS) | |
2973 | return status; | |
2974 | ||
2975 | status = omapi_connection_put_name (c, "last-timestamp-received"); | |
2976 | if (status != ISC_R_SUCCESS) | |
2977 | return status; | |
2978 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2979 | if (status != ISC_R_SUCCESS) | |
2980 | return status; | |
2981 | status = (omapi_connection_put_uint32 | |
2982 | (c, (u_int32_t)s -> last_timestamp_received)); | |
2983 | if (status != ISC_R_SUCCESS) | |
2984 | return status; | |
2985 | ||
2986 | status = omapi_connection_put_name (c, "skew"); | |
2987 | if (status != ISC_R_SUCCESS) | |
2988 | return status; | |
2989 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
2990 | if (status != ISC_R_SUCCESS) | |
2991 | return status; | |
2992 | status = omapi_connection_put_uint32 (c, (u_int32_t)s -> skew); | |
2993 | if (status != ISC_R_SUCCESS) | |
2994 | return status; | |
2995 | ||
85a53735 TL |
2996 | status = omapi_connection_put_name (c, "max-response-delay"); |
2997 | if (status != ISC_R_SUCCESS) | |
2998 | return status; | |
2999 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
3000 | if (status != ISC_R_SUCCESS) | |
3001 | return status; | |
3002 | status = (omapi_connection_put_uint32 | |
02ca1b45 | 3003 | (c, (u_int32_t)s -> me.max_response_delay)); |
85a53735 TL |
3004 | if (status != ISC_R_SUCCESS) |
3005 | return status; | |
3006 | ||
3007 | status = omapi_connection_put_name (c, "cur-unacked-updates"); | |
3008 | if (status != ISC_R_SUCCESS) | |
3009 | return status; | |
3010 | status = omapi_connection_put_uint32 (c, sizeof (u_int32_t)); | |
3011 | if (status != ISC_R_SUCCESS) | |
3012 | return status; | |
3013 | status = (omapi_connection_put_uint32 | |
3014 | (c, (u_int32_t)s -> cur_unacked_updates)); | |
3015 | if (status != ISC_R_SUCCESS) | |
3016 | return status; | |
3017 | ||
3018 | if (h -> inner && h -> inner -> type -> stuff_values) | |
3019 | return (*(h -> inner -> type -> stuff_values)) (c, id, | |
3020 | h -> inner); | |
d50d0b82 TL |
3021 | return ISC_R_SUCCESS; |
3022 | } | |
3023 | ||
d8a417b2 TL |
3024 | isc_result_t dhcp_failover_state_lookup (omapi_object_t **sp, |
3025 | omapi_object_t *id, | |
3026 | omapi_object_t *ref) | |
3027 | { | |
3028 | omapi_value_t *tv = (omapi_value_t *)0; | |
3029 | isc_result_t status; | |
3030 | dhcp_failover_state_t *s; | |
3031 | ||
d758ad8c TL |
3032 | if (!ref) |
3033 | return ISC_R_NOKEYS; | |
3034 | ||
d8a417b2 TL |
3035 | /* First see if we were sent a handle. */ |
3036 | status = omapi_get_value_str (ref, id, "handle", &tv); | |
3037 | if (status == ISC_R_SUCCESS) { | |
3038 | status = omapi_handle_td_lookup (sp, tv -> value); | |
3039 | ||
4bd8800e | 3040 | omapi_value_dereference (&tv, MDL); |
d8a417b2 TL |
3041 | if (status != ISC_R_SUCCESS) |
3042 | return status; | |
3043 | ||
3044 | /* Don't return the object if the type is wrong. */ | |
3045 | if ((*sp) -> type != dhcp_type_failover_state) { | |
4bd8800e | 3046 | omapi_object_dereference (sp, MDL); |
d8a417b2 TL |
3047 | return ISC_R_INVALIDARG; |
3048 | } | |
3049 | } | |
3050 | ||
dd53dc5a | 3051 | /* Look the failover state up by peer name. */ |
01c6e68a | 3052 | status = omapi_get_value_str (ref, id, "name", &tv); |
d8a417b2 TL |
3053 | if (status == ISC_R_SUCCESS) { |
3054 | for (s = failover_states; s; s = s -> next) { | |
dd53dc5a | 3055 | unsigned l = strlen (s -> name); |
d8a417b2 | 3056 | if (l == tv -> value -> u.buffer.len || |
dd53dc5a | 3057 | !memcmp (s -> name, |
d8a417b2 TL |
3058 | tv -> value -> u.buffer.value, l)) |
3059 | break; | |
3060 | } | |
4bd8800e | 3061 | omapi_value_dereference (&tv, MDL); |
d8a417b2 TL |
3062 | |
3063 | /* If we already have a lease, and it's not the same one, | |
3064 | then the query was invalid. */ | |
3065 | if (*sp && *sp != (omapi_object_t *)s) { | |
4bd8800e | 3066 | omapi_object_dereference (sp, MDL); |
d8a417b2 TL |
3067 | return ISC_R_KEYCONFLICT; |
3068 | } else if (!s) { | |
3069 | if (*sp) | |
4bd8800e | 3070 | omapi_object_dereference (sp, MDL); |
d8a417b2 TL |
3071 | return ISC_R_NOTFOUND; |
3072 | } else if (!*sp) | |
3073 | /* XXX fix so that hash lookup itself creates | |
3074 | XXX the reference. */ | |
4bd8800e | 3075 | omapi_object_reference (sp, (omapi_object_t *)s, MDL); |
d8a417b2 TL |
3076 | } |
3077 | ||
3078 | /* If we get to here without finding a lease, no valid key was | |
3079 | specified. */ | |
3080 | if (!*sp) | |
3081 | return ISC_R_NOKEYS; | |
3082 | return ISC_R_SUCCESS; | |
3083 | } | |
3084 | ||
3085 | isc_result_t dhcp_failover_state_create (omapi_object_t **sp, | |
3086 | omapi_object_t *id) | |
3087 | { | |
3088 | return ISC_R_NOTIMPLEMENTED; | |
3089 | } | |
3090 | ||
3091 | isc_result_t dhcp_failover_state_remove (omapi_object_t *sp, | |
3092 | omapi_object_t *id) | |
3093 | { | |
3094 | return ISC_R_NOTIMPLEMENTED; | |
3095 | } | |
3096 | ||
9f3da356 TL |
3097 | int dhcp_failover_state_match (dhcp_failover_state_t *state, |
3098 | u_int8_t *addr, unsigned addrlen) | |
3099 | { | |
3100 | struct option_cache *oc; | |
3101 | struct data_string ds; | |
3102 | int i; | |
3103 | ||
3104 | memset (&ds, 0, sizeof ds); | |
3105 | if (evaluate_option_cache (&ds, (struct packet *)0, | |
3106 | (struct lease *)0, | |
9e383163 | 3107 | (struct client_state *)0, |
9f3da356 TL |
3108 | (struct option_state *)0, |
3109 | (struct option_state *)0, | |
3110 | &global_scope, | |
02ca1b45 | 3111 | state -> partner.address, MDL)) { |
9f3da356 TL |
3112 | for (i = 0; i + addrlen - 1 < ds.len; i += addrlen) { |
3113 | if (!memcmp (&ds.data [i], | |
3114 | addr, addrlen)) { | |
3115 | data_string_forget (&ds, MDL); | |
3116 | return 1; | |
3117 | } | |
3118 | } | |
3119 | data_string_forget (&ds, MDL); | |
3120 | } | |
3121 | return 0; | |
3122 | } | |
3123 | ||
3124 | const char *dhcp_failover_reject_reason_print (int reason) | |
3125 | { | |
3126 | switch (reason) { | |
3127 | case FTR_ILLEGAL_IP_ADDR: | |
3128 | return "Illegal IP address (not part of any address pool)."; | |
3129 | ||
3130 | case FTR_FATAL_CONFLICT: | |
3131 | return "Fatal conflict exists: address in use by other client."; | |
3132 | ||
3133 | case FTR_MISSING_BINDINFO: | |
3134 | return "Missing binding information."; | |
3135 | ||
3136 | case FTR_TIMEMISMATCH: | |
3137 | return "Connection rejected, time mismatch too great."; | |
3138 | ||
3139 | case FTR_INVALID_MCLT: | |
3140 | return "Connection rejected, invalid MCLT."; | |
3141 | ||
3142 | case FTR_MISC_REJECT: | |
3143 | return "Connection rejected, unknown reason."; | |
3144 | ||
3145 | case FTR_DUP_CONNECTION: | |
3146 | return "Connection rejected, duplicate connection."; | |
3147 | ||
3148 | case FTR_INVALID_PARTNER: | |
3149 | return "Connection rejected, invalid failover partner."; | |
3150 | ||
3151 | case FTR_TLS_UNSUPPORTED: | |
3152 | return "TLS not supported."; | |
3153 | ||
3154 | case FTR_TLS_UNCONFIGURED: | |
3155 | return "TLS supported but not configured."; | |
3156 | ||
3157 | case FTR_TLS_REQUIRED: | |
3158 | return "TLS required but not supported by partner."; | |
3159 | ||
3160 | case FTR_DIGEST_UNSUPPORTED: | |
3161 | return "Message digest not supported."; | |
3162 | ||
3163 | case FTR_DIGEST_UNCONFIGURED: | |
3164 | return "Message digest not configured."; | |
3165 | ||
3166 | case FTR_VERSION_MISMATCH: | |
3167 | return "Protocol version mismatch."; | |
3168 | ||
3169 | case FTR_MISSING_BIND_INFO: | |
3170 | return "Missing binding information."; | |
3171 | ||
3172 | case FTR_OUTDATED_BIND_INFO: | |
3173 | return "Outdated binding information."; | |
3174 | ||
3175 | case FTR_LESS_CRIT_BIND_INFO: | |
3176 | return "Less critical binding information."; | |
3177 | ||
3178 | case FTR_NO_TRAFFIC: | |
3179 | return "No traffic within sufficient time."; | |
3180 | ||
3181 | case FTR_HBA_CONFLICT: | |
3182 | return "Hash bucket assignment conflict."; | |
3183 | ||
3184 | default: | |
3185 | case FTR_UNKNOWN: | |
3186 | return "Unknown: Error occurred but does not match any reason code."; | |
3187 | } | |
3188 | } | |
3189 | ||
3190 | const char *dhcp_failover_state_name_print (enum failover_state state) | |
3191 | { | |
3192 | switch (state) { | |
3193 | default: | |
3194 | case unknown_state: | |
3195 | return "unknown-state"; | |
3196 | ||
3197 | case partner_down: | |
3198 | return "partner-down"; | |
3199 | ||
3200 | case normal: | |
3201 | return "normal"; | |
3202 | ||
3203 | case communications_interrupted: | |
3204 | return "communications-interrupted"; | |
3205 | ||
5f0c7be1 TL |
3206 | case resolution_interrupted: |
3207 | return "resolution-interrupted"; | |
9f3da356 TL |
3208 | |
3209 | case potential_conflict: | |
3210 | return "potential-conflict"; | |
3211 | ||
3212 | case recover: | |
3213 | return "recover"; | |
02ca1b45 TL |
3214 | |
3215 | case recover_done: | |
3216 | return "recover-done"; | |
3217 | ||
fd273e02 TL |
3218 | case recover_wait: |
3219 | return "recover-wait"; | |
3220 | ||
02ca1b45 TL |
3221 | case shut_down: |
3222 | return "shutdown"; | |
3223 | ||
3224 | case paused: | |
3225 | return "paused"; | |
3226 | ||
3227 | case startup: | |
3228 | return "startup"; | |
3229 | } | |
3230 | } | |
3231 | ||
d9539882 | 3232 | const char *dhcp_failover_message_name (unsigned type) |
02ca1b45 TL |
3233 | { |
3234 | switch (type) { | |
3235 | case FTM_POOLREQ: | |
3236 | return "pool-request"; | |
3237 | ||
3238 | case FTM_POOLRESP: | |
3239 | return "pool-response"; | |
3240 | ||
3241 | case FTM_BNDUPD: | |
3242 | return "bind-update"; | |
3243 | ||
3244 | case FTM_BNDACK: | |
3245 | return "bind-ack"; | |
3246 | ||
3247 | case FTM_CONNECT: | |
3248 | return "connect"; | |
3249 | ||
3250 | case FTM_CONNECTACK: | |
3251 | return "connect-ack"; | |
3252 | ||
3253 | case FTM_UPDREQ: | |
3254 | return "update-request"; | |
3255 | ||
3256 | case FTM_UPDDONE: | |
3257 | return "update-done"; | |
3258 | ||
3259 | case FTM_UPDREQALL: | |
3260 | return "update-request-all"; | |
3261 | ||
3262 | case FTM_STATE: | |
3263 | return "state"; | |
3264 | ||
3265 | case FTM_CONTACT: | |
3266 | return "contact"; | |
3267 | ||
3268 | case FTM_DISCONNECT: | |
3269 | return "disconnect"; | |
3270 | ||
3271 | default: | |
3272 | return "<unknown message type>"; | |
3273 | } | |
3274 | } | |
3275 | ||
12fd6075 TL |
3276 | const char *dhcp_failover_option_name (unsigned type) |
3277 | { | |
02ca1b45 TL |
3278 | switch (type) { |
3279 | case FTO_BINDING_STATUS: | |
3280 | return "binding-status"; | |
3281 | ||
3282 | case FTO_ASSIGNED_IP_ADDRESS: | |
3283 | return "assigned-ip-address"; | |
3284 | ||
3285 | case FTO_SERVER_ADDR: | |
3286 | return "server-addr"; | |
3287 | ||
3288 | case FTO_ADDRESSES_TRANSFERRED: | |
3289 | return "addresses-transferred"; | |
3290 | ||
3291 | case FTO_CLIENT_IDENTIFIER: | |
3292 | return "client-identifier"; | |
3293 | ||
3294 | case FTO_CHADDR: | |
3295 | return "chaddr"; | |
3296 | ||
3297 | case FTO_DDNS: | |
3298 | return "ddns"; | |
3299 | ||
3300 | case FTO_REJECT_REASON: | |
3301 | return "reject-reason"; | |
3302 | ||
3303 | case FTO_MESSAGE: | |
3304 | return "message"; | |
3305 | ||
3306 | case FTO_MCLT: | |
3307 | return "mclt"; | |
3308 | ||
3309 | case FTO_VENDOR_CLASS: | |
3310 | return "vendor-class"; | |
3311 | ||
3312 | case FTO_LEASE_EXPIRY: | |
3313 | return "lease-expiry"; | |
3314 | ||
3315 | case FTO_POTENTIAL_EXPIRY: | |
3316 | return "potential-expiry"; | |
3317 | ||
3318 | case FTO_GRACE_EXPIRY: | |
3319 | return "grace-expiry"; | |
3320 | ||
3321 | case FTO_CLTT: | |
3322 | return "cltt"; | |
3323 | ||
3324 | case FTO_STOS: | |
3325 | return "stos"; | |
3326 | ||
3327 | case FTO_SERVER_STATE: | |
3328 | return "server-state"; | |
3329 | ||
3330 | case FTO_SERVER_FLAGS: | |
3331 | return "server-flags"; | |
3332 | ||
3333 | case FTO_VENDOR_OPTIONS: | |
3334 | return "vendor-options"; | |
3335 | ||
3336 | case FTO_MAX_UNACKED: | |
3337 | return "max-unacked"; | |
3338 | ||
3339 | case FTO_RECEIVE_TIMER: | |
3340 | return "receive-timer"; | |
3341 | ||
3342 | case FTO_HBA: | |
3343 | return "hba"; | |
3344 | ||
3345 | case FTO_MESSAGE_DIGEST: | |
3346 | return "message-digest"; | |
3347 | ||
3348 | case FTO_PROTOCOL_VERSION: | |
3349 | return "protocol-version"; | |
3350 | ||
3351 | case FTO_TLS_REQUEST: | |
3352 | return "tls-request"; | |
3353 | ||
3354 | case FTO_TLS_REPLY: | |
3355 | return "tls-reply"; | |
3356 | ||
3357 | case FTO_REQUEST_OPTIONS: | |
3358 | return "request-options"; | |
3359 | ||
3360 | case FTO_REPLY_OPTIONS: | |
3361 | return "reply-options"; | |
3362 | ||
3363 | default: | |
3364 | return "<unknown option>"; | |
9f3da356 TL |
3365 | } |
3366 | } | |
3367 | ||
8c8e27c5 TL |
3368 | failover_option_t *dhcp_failover_option_printf (unsigned code, |
3369 | char *obuf, | |
3370 | unsigned *obufix, | |
3371 | unsigned obufmax, | |
007e3ee4 TL |
3372 | const char *fmt, ...) |
3373 | { | |
8c8e27c5 TL |
3374 | va_list va; |
3375 | char tbuf [256]; | |
3376 | ||
3377 | va_start (va, fmt); | |
3378 | #if defined (HAVE_SNPRINTF) | |
3379 | /* Presumably if we have snprintf, we also have | |
3380 | vsnprintf. */ | |
3381 | vsnprintf (tbuf, sizeof tbuf, fmt, va); | |
3382 | #else | |
3383 | vsprintf (tbuf, fmt, va); | |
3384 | #endif | |
3385 | va_end (va); | |
3386 | ||
3387 | return dhcp_failover_make_option (code, obuf, obufix, obufmax, | |
3388 | strlen (tbuf), tbuf); | |
3389 | } | |
3390 | ||
d8a417b2 TL |
3391 | failover_option_t *dhcp_failover_make_option (unsigned code, |
3392 | char *obuf, unsigned *obufix, | |
3393 | unsigned obufmax, ...) | |
3394 | { | |
3395 | va_list va; | |
3396 | struct failover_option_info *info; | |
3397 | int i; | |
3398 | unsigned size, count; | |
3399 | unsigned val; | |
85a53735 TL |
3400 | u_int8_t *iaddr; |
3401 | unsigned ilen; | |
d8a417b2 | 3402 | u_int8_t *bval; |
8c8e27c5 | 3403 | char *txt; |
d8a417b2 TL |
3404 | #if defined (DEBUG_FAILOVER_MESSAGES) |
3405 | char tbuf [256]; | |
3406 | #endif | |
8c8e27c5 | 3407 | |
d8a417b2 TL |
3408 | /* Note that the failover_option structure is used differently on |
3409 | input than on output - on input, count is an element count, and | |
3410 | on output it's the number of bytes total in the option, including | |
3411 | the option code and option length. */ | |
3412 | failover_option_t option, *op; | |
3413 | ||
3414 | ||
3415 | /* Bogus option code? */ | |
3416 | if (code < 1 || code > FTO_MAX || ft_options [code].type == FT_UNDEF) { | |
3417 | return &null_failover_option; | |
3418 | } | |
3419 | info = &ft_options [code]; | |
3420 | ||
3421 | va_start (va, obufmax); | |
3422 | ||
3423 | /* Get the number of elements and the size of the buffer we need | |
3424 | to allocate. */ | |
3425 | if (info -> type == FT_DDNS || info -> type == FT_DDNS1) { | |
3426 | count = info -> type == FT_DDNS ? 1 : 2; | |
3427 | size = va_arg (va, int) + count; | |
3428 | } else { | |
3429 | /* Find out how many items in this list. */ | |
3430 | if (info -> num_present) | |
3431 | count = info -> num_present; | |
3432 | else | |
3433 | count = va_arg (va, int); | |
3434 | ||
3435 | /* Figure out size. */ | |
3436 | switch (info -> type) { | |
3437 | case FT_UINT8: | |
3438 | case FT_BYTES: | |
3439 | case FT_DIGEST: | |
3440 | size = count; | |
3441 | break; | |
3442 | ||
3443 | case FT_TEXT_OR_BYTES: | |
3444 | case FT_TEXT: | |
8c8e27c5 TL |
3445 | txt = va_arg (va, char *); |
3446 | size = count; | |
d8a417b2 TL |
3447 | break; |
3448 | ||
3449 | case FT_IPADDR: | |
9f3da356 TL |
3450 | ilen = va_arg (va, unsigned); |
3451 | size = count * ilen; | |
8c8e27c5 | 3452 | break; |
9f3da356 | 3453 | |
d8a417b2 TL |
3454 | case FT_UINT32: |
3455 | size = count * 4; | |
3456 | break; | |
3457 | ||
3458 | case FT_UINT16: | |
3459 | size = count * 2; | |
3460 | break; | |
3461 | ||
3462 | default: | |
3463 | /* shouldn't get here. */ | |
3464 | log_fatal ("bogus type in failover_make_option: %d", | |
3465 | info -> type); | |
3466 | break; | |
3467 | } | |
3468 | } | |
3469 | ||
3470 | size += 4; | |
3471 | ||
3472 | /* Allocate a buffer for the option. */ | |
3473 | option.count = size; | |
4bd8800e | 3474 | option.data = dmalloc (option.count, MDL); |
d8a417b2 TL |
3475 | if (!option.data) |
3476 | return &null_failover_option; | |
3477 | ||
3478 | /* Put in the option code and option length. */ | |
3479 | putUShort (option.data, code); | |
9f3da356 | 3480 | putUShort (&option.data [2], size - 4); |
d8a417b2 TL |
3481 | |
3482 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3483 | sprintf (tbuf, " (%s<%d>", info -> name, option.count); | |
3484 | failover_print (obuf, obufix, obufmax, tbuf); | |
3485 | #endif | |
3486 | ||
3487 | /* Now put in the data. */ | |
3488 | switch (info -> type) { | |
3489 | case FT_UINT8: | |
3490 | for (i = 0; i < count; i++) { | |
3491 | val = va_arg (va, unsigned); | |
3492 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3493 | sprintf (tbuf, " %d", val); | |
3494 | failover_print (obuf, obufix, obufmax, tbuf); | |
3495 | #endif | |
3496 | option.data [i + 4] = val; | |
3497 | } | |
3498 | break; | |
3499 | ||
3500 | case FT_IPADDR: | |
3501 | for (i = 0; i < count; i++) { | |
85a53735 TL |
3502 | iaddr = va_arg (va, u_int8_t *); |
3503 | if (ilen != 4) { | |
4bd8800e | 3504 | dfree (option.data, MDL); |
d8a417b2 | 3505 | log_error ("IP addrlen=%d, should be 4.", |
85a53735 | 3506 | ilen); |
d8a417b2 TL |
3507 | return &null_failover_option; |
3508 | } | |
3509 | ||
3510 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
85a53735 TL |
3511 | sprintf (tbuf, " %u.%u.%u.%u", iaddr [0], iaddr [1], |
3512 | iaddr [2], iaddr [3]); | |
d8a417b2 TL |
3513 | failover_print (obuf, obufix, obufmax, tbuf); |
3514 | #endif | |
9f3da356 | 3515 | memcpy (&option.data [4 + i * ilen], iaddr, ilen); |
d8a417b2 TL |
3516 | } |
3517 | break; | |
3518 | ||
3519 | case FT_UINT32: | |
3520 | for (i = 0; i < count; i++) { | |
3521 | val = va_arg (va, unsigned); | |
3522 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3523 | sprintf (tbuf, " %d", val); | |
3524 | failover_print (obuf, obufix, obufmax, tbuf); | |
3525 | #endif | |
3526 | putULong (&option.data [4 + i * 4], val); | |
3527 | } | |
3528 | break; | |
3529 | ||
3530 | case FT_BYTES: | |
3531 | case FT_DIGEST: | |
3532 | bval = va_arg (va, u_int8_t *); | |
3533 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3534 | for (i = 0; i < count; i++) { | |
3535 | sprintf (tbuf, " %d", bval [i]); | |
3536 | failover_print (obuf, obufix, obufmax, tbuf); | |
3537 | } | |
3538 | #endif | |
3539 | memcpy (&option.data [4], bval, count); | |
3540 | break; | |
3541 | ||
3542 | /* On output, TEXT_OR_BYTES is _always_ text, and always NUL | |
3543 | terminated. Note that the caller should be careful not to | |
3544 | provide a format and data that amount to more than 256 bytes | |
3545 | of data, since it will be truncated on platforms that | |
3546 | support snprintf, and will mung the stack on those platforms | |
3547 | that do not support snprintf. Also, callers should not pass | |
3548 | data acquired from the network without specifically checking | |
3549 | it to make sure it won't bash the stack. */ | |
3550 | case FT_TEXT_OR_BYTES: | |
3551 | case FT_TEXT: | |
3552 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
8c8e27c5 | 3553 | sprintf (tbuf, "\"%s\"", txt); |
d8a417b2 | 3554 | failover_print (obuf, obufix, obufmax, tbuf); |
d8a417b2 | 3555 | #endif |
8c8e27c5 | 3556 | memcpy (&option.data [4], txt, count); |
d8a417b2 TL |
3557 | break; |
3558 | ||
3559 | case FT_DDNS: | |
3560 | case FT_DDNS1: | |
3561 | option.data [4] = va_arg (va, unsigned); | |
3562 | if (count == 2) | |
3563 | option.data [5] = va_arg (va, unsigned); | |
3564 | bval = va_arg (va, u_int8_t *); | |
3565 | memcpy (&option.data [4 + count], bval, size - count - 4); | |
3566 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3567 | for (i = 4; i < size; i++) { | |
3568 | sprintf (tbuf, " %d", option.data [i]); | |
3569 | failover_print (obuf, obufix, obufmax, tbuf); | |
3570 | } | |
3571 | #endif | |
3572 | break; | |
3573 | ||
3574 | case FT_UINT16: | |
3575 | for (i = 0; i < count; i++) { | |
3576 | val = va_arg (va, u_int32_t); | |
3577 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3578 | sprintf (tbuf, " %d", val); | |
3579 | failover_print (obuf, obufix, obufmax, tbuf); | |
3580 | #endif | |
3581 | putUShort (&option.data [4 + i * 2], val); | |
3582 | } | |
3583 | break; | |
3584 | ||
3585 | case FT_UNDEF: | |
3586 | default: | |
165bce70 | 3587 | break; |
d8a417b2 TL |
3588 | } |
3589 | ||
0096c639 | 3590 | #if defined DEBUG_FAILOVER_MESSAGES |
d8a417b2 | 3591 | failover_print (obuf, obufix, obufmax, ")"); |
0096c639 | 3592 | #endif |
d8a417b2 TL |
3593 | |
3594 | /* Now allocate a place to store what we just set up. */ | |
4bd8800e | 3595 | op = dmalloc (sizeof (failover_option_t), MDL); |
d8a417b2 | 3596 | if (!op) { |
4bd8800e | 3597 | dfree (option.data, MDL); |
d8a417b2 TL |
3598 | return &null_failover_option; |
3599 | } | |
3600 | ||
3601 | *op = option; | |
3602 | return op; | |
3603 | } | |
3604 | ||
3605 | /* Send a failover message header. */ | |
3606 | ||
3607 | isc_result_t dhcp_failover_put_message (dhcp_failover_link_t *link, | |
3608 | omapi_object_t *connection, | |
3609 | int msg_type, ...) | |
3610 | { | |
3611 | unsigned count = 0; | |
3612 | unsigned size = 0; | |
3613 | int bad_option = 0; | |
3614 | int opix = 0; | |
3615 | va_list list; | |
3616 | failover_option_t *option; | |
3617 | unsigned char *opbuf; | |
3618 | isc_result_t status = ISC_R_SUCCESS; | |
3619 | unsigned char cbuf; | |
3620 | ||
3621 | /* Run through the argument list once to compute the length of | |
3622 | the option portion of the message. */ | |
3623 | va_start (list, msg_type); | |
3624 | while ((option = va_arg (list, failover_option_t *))) { | |
dd53dc5a TL |
3625 | if (option != &skip_failover_option) |
3626 | size += option -> count; | |
d8a417b2 TL |
3627 | if (option == &null_failover_option) |
3628 | bad_option = 1; | |
3629 | } | |
3630 | va_end (list); | |
3631 | ||
3632 | /* Allocate an option buffer, unless we got an error. */ | |
61aaca12 | 3633 | if (!bad_option && size) { |
4bd8800e | 3634 | opbuf = dmalloc (size, MDL); |
d8a417b2 TL |
3635 | if (!opbuf) |
3636 | status = ISC_R_NOMEMORY; | |
61aaca12 TL |
3637 | } else |
3638 | opbuf = (unsigned char *)0; | |
d8a417b2 TL |
3639 | |
3640 | va_start (list, msg_type); | |
3641 | while ((option = va_arg (list, failover_option_t *))) { | |
dd53dc5a TL |
3642 | if (option == &skip_failover_option) |
3643 | continue; | |
d8a417b2 TL |
3644 | if (!bad_option && opbuf) |
3645 | memcpy (&opbuf [opix], | |
3646 | option -> data, option -> count); | |
85a53735 TL |
3647 | if (option != &null_failover_option && |
3648 | option != &skip_failover_option) { | |
3649 | opix += option -> count; | |
3650 | dfree (option -> data, MDL); | |
3651 | dfree (option, MDL); | |
3652 | } | |
d8a417b2 TL |
3653 | } |
3654 | ||
9f3da356 TL |
3655 | if (bad_option) |
3656 | return ISC_R_INVALIDARG; | |
d8a417b2 TL |
3657 | |
3658 | /* Now send the message header. */ | |
3659 | ||
3660 | /* Message length. */ | |
3661 | status = omapi_connection_put_uint16 (connection, size + 12); | |
3662 | if (status != ISC_R_SUCCESS) | |
3663 | goto err; | |
3664 | ||
3665 | /* Message type. */ | |
3666 | cbuf = msg_type; | |
3667 | status = omapi_connection_copyin (connection, &cbuf, 1); | |
3668 | if (status != ISC_R_SUCCESS) | |
3669 | goto err; | |
3670 | ||
3671 | /* Payload offset. */ | |
3672 | cbuf = 12; | |
3673 | status = omapi_connection_copyin (connection, &cbuf, 1); | |
3674 | if (status != ISC_R_SUCCESS) | |
3675 | goto err; | |
3676 | ||
3677 | /* Current time. */ | |
3678 | status = omapi_connection_put_uint32 (connection, (u_int32_t)cur_time); | |
3679 | if (status != ISC_R_SUCCESS) | |
3680 | goto err; | |
3681 | ||
3682 | /* Transaction ID. */ | |
3683 | status = omapi_connection_put_uint32 (connection, link -> xid++); | |
3684 | if (status != ISC_R_SUCCESS) | |
3685 | goto err; | |
3686 | ||
3687 | ||
3688 | /* Payload. */ | |
61aaca12 TL |
3689 | if (opbuf) { |
3690 | status = omapi_connection_copyin (connection, opbuf, size); | |
3691 | if (status != ISC_R_SUCCESS) | |
3692 | goto err; | |
3693 | dfree (opbuf, MDL); | |
3694 | } | |
6f0b9ed0 | 3695 | if (link -> state_object && |
da292833 | 3696 | link -> state_object -> link_to_peer == link) { |
0db87765 TL |
3697 | #if defined (DEBUG_FAILOVER_TIMING) |
3698 | log_info ("add_timeout +%d %s", | |
3699 | (int)(link -> state_object -> | |
3700 | partner.max_response_delay) / 3, | |
3701 | "dhcp_failover_send_contact"); | |
3702 | #endif | |
6f0b9ed0 | 3703 | add_timeout (cur_time + |
02ca1b45 TL |
3704 | (int)(link -> state_object -> |
3705 | partner.max_response_delay) / 3, | |
6f0b9ed0 TL |
3706 | dhcp_failover_send_contact, link -> state_object, |
3707 | (tvref_t)dhcp_failover_state_reference, | |
3708 | (tvunref_t)dhcp_failover_state_dereference); | |
da292833 | 3709 | } |
d8a417b2 TL |
3710 | return status; |
3711 | ||
3712 | err: | |
61aaca12 TL |
3713 | if (opbuf) |
3714 | dfree (opbuf, MDL); | |
02ca1b45 | 3715 | log_info ("dhcp_failover_put_message: something went wrong."); |
d8a417b2 TL |
3716 | omapi_disconnect (connection, 1); |
3717 | return status; | |
9f3da356 | 3718 | } |
d8a417b2 | 3719 | |
6f0b9ed0 TL |
3720 | void dhcp_failover_timeout (void *vstate) |
3721 | { | |
3722 | dhcp_failover_state_t *state = vstate; | |
3723 | dhcp_failover_link_t *link; | |
3724 | isc_result_t status; | |
3725 | ||
0db87765 TL |
3726 | #if defined (DEBUG_FAILOVER_TIMING) |
3727 | log_info ("dhcp_failover_timeout"); | |
3728 | #endif | |
3729 | ||
6f0b9ed0 TL |
3730 | if (!state || state -> type != dhcp_type_failover_state) |
3731 | return; | |
6f0b9ed0 TL |
3732 | link = state -> link_to_peer; |
3733 | if (!link || | |
3734 | !link -> outer || | |
3735 | link -> outer -> type != omapi_type_connection) | |
3736 | return; | |
3737 | ||
3738 | log_error ("timeout waiting for failover peer %s", state -> name); | |
3739 | ||
3740 | /* If we haven't gotten a timely response, blow away the connection. | |
3741 | This will cause the state to change automatically. */ | |
3742 | omapi_disconnect (link -> outer, 1); | |
3743 | } | |
3744 | ||
3745 | void dhcp_failover_send_contact (void *vstate) | |
3746 | { | |
3747 | dhcp_failover_state_t *state = vstate; | |
3748 | dhcp_failover_link_t *link; | |
3749 | isc_result_t status; | |
3750 | ||
3751 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3752 | char obuf [64]; | |
3753 | unsigned obufix = 0; | |
3754 | ||
3755 | # define FMA obuf, &obufix, sizeof obuf | |
3756 | failover_print (FMA, "(contact"); | |
3757 | #else | |
00c272ee | 3758 | # define FMA (char *)0, (unsigned *)0, 0 |
6f0b9ed0 TL |
3759 | #endif |
3760 | ||
0db87765 TL |
3761 | #if defined (DEBUG_FAILOVER_TIMING) |
3762 | log_info ("dhcp_failover_send_contact"); | |
3763 | #endif | |
3764 | ||
6f0b9ed0 TL |
3765 | if (!state || state -> type != dhcp_type_failover_state) |
3766 | return; | |
3767 | link = state -> link_to_peer; | |
3768 | if (!link || | |
3769 | !link -> outer || | |
3770 | link -> outer -> type != omapi_type_connection) | |
3771 | return; | |
3772 | ||
3773 | status = (dhcp_failover_put_message | |
3774 | (link, link -> outer, | |
3775 | FTM_CONTACT, | |
02ca1b45 TL |
3776 | (failover_option_t *)0)); |
3777 | ||
3778 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3779 | if (status != ISC_R_SUCCESS) | |
3780 | failover_print (FMA, " (failed)"); | |
3781 | failover_print (FMA, ")"); | |
3782 | if (obufix) { | |
3783 | log_debug ("%s", obuf); | |
3784 | } | |
3785 | #endif | |
3786 | return; | |
3787 | } | |
3788 | ||
3789 | isc_result_t dhcp_failover_send_state (dhcp_failover_state_t *state) | |
3790 | { | |
3791 | dhcp_failover_link_t *link; | |
3792 | isc_result_t status; | |
3793 | ||
3794 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3795 | char obuf [64]; | |
3796 | unsigned obufix = 0; | |
3797 | ||
3798 | # define FMA obuf, &obufix, sizeof obuf | |
3799 | failover_print (FMA, "(state"); | |
3800 | #else | |
3801 | # define FMA (char *)0, (unsigned *)0, 0 | |
3802 | #endif | |
3803 | ||
3804 | if (!state || state -> type != dhcp_type_failover_state) | |
3805 | return ISC_R_INVALIDARG; | |
3806 | link = state -> link_to_peer; | |
3807 | if (!link || | |
3808 | !link -> outer || | |
3809 | link -> outer -> type != omapi_type_connection) | |
3810 | return ISC_R_INVALIDARG; | |
3811 | ||
3812 | status = (dhcp_failover_put_message | |
3813 | (link, link -> outer, | |
3814 | FTM_STATE, | |
5f0c7be1 | 3815 | dhcp_failover_make_option (FTO_SERVER_STATE, FMA, |
02ca1b45 TL |
3816 | (state -> me.state == startup |
3817 | ? state -> saved_state | |
3818 | : state -> me.state)), | |
5f0c7be1 TL |
3819 | dhcp_failover_make_option |
3820 | (FTO_SERVER_FLAGS, FMA, | |
3821 | (state -> service_state == service_startup | |
3822 | ? FTF_STARTUP : 0)), | |
02ca1b45 | 3823 | dhcp_failover_make_option (FTO_STOS, FMA, state -> me.stos), |
6f0b9ed0 TL |
3824 | (failover_option_t *)0)); |
3825 | ||
3826 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3827 | if (status != ISC_R_SUCCESS) | |
3828 | failover_print (FMA, " (failed)"); | |
3829 | failover_print (FMA, ")"); | |
3830 | if (obufix) { | |
3831 | log_debug ("%s", obuf); | |
3832 | } | |
3833 | #endif | |
02ca1b45 | 3834 | return ISC_R_SUCCESS; |
6f0b9ed0 TL |
3835 | } |
3836 | ||
d8a417b2 TL |
3837 | /* Send a connect message. */ |
3838 | ||
3839 | isc_result_t dhcp_failover_send_connect (omapi_object_t *l) | |
3840 | { | |
3841 | dhcp_failover_link_t *link; | |
3842 | dhcp_failover_state_t *state; | |
3843 | isc_result_t status; | |
007e3ee4 | 3844 | char hba [32]; |
d8a417b2 TL |
3845 | #if defined (DEBUG_FAILOVER_MESSAGES) |
3846 | char obuf [64]; | |
3847 | unsigned obufix = 0; | |
3848 | ||
3849 | # define FMA obuf, &obufix, sizeof obuf | |
3850 | failover_print (FMA, "(connect"); | |
3851 | #else | |
00c272ee | 3852 | # define FMA (char *)0, (unsigned *)0, 0 |
d8a417b2 TL |
3853 | #endif |
3854 | ||
d8a417b2 TL |
3855 | if (!l || l -> type != dhcp_type_failover_link) |
3856 | return ISC_R_INVALIDARG; | |
3857 | link = (dhcp_failover_link_t *)l; | |
3858 | state = link -> state_object; | |
3859 | if (!l -> outer || l -> outer -> type != omapi_type_connection) | |
3860 | return ISC_R_INVALIDARG; | |
3861 | ||
02ca1b45 TL |
3862 | status = |
3863 | (dhcp_failover_put_message | |
3864 | (link, l -> outer, | |
3865 | FTM_CONNECT, | |
3866 | dhcp_failover_make_option (FTO_SERVER_ADDR, FMA, | |
3867 | state -> server_identifier.len, | |
3868 | state -> server_identifier.data), | |
3869 | dhcp_failover_make_option (FTO_MAX_UNACKED, FMA, | |
3870 | state -> me.max_flying_updates), | |
3871 | dhcp_failover_make_option (FTO_RECEIVE_TIMER, FMA, | |
3872 | state -> me.max_response_delay), | |
3873 | dhcp_failover_option_printf (FTO_VENDOR_CLASS, FMA, | |
3874 | "isc-%s", DHCP_VERSION), | |
3875 | dhcp_failover_make_option (FTO_PROTOCOL_VERSION, FMA, | |
3876 | DHCP_FAILOVER_VERSION), | |
3877 | dhcp_failover_make_option (FTO_TLS_REQUEST, FMA, | |
3878 | 0, 0), | |
3879 | dhcp_failover_make_option (FTO_MCLT, FMA, | |
3880 | state -> mclt), | |
3881 | (state -> hba | |
3882 | ? dhcp_failover_make_option (FTO_HBA, FMA, 32, state -> hba) | |
3883 | : &skip_failover_option), | |
3884 | (failover_option_t *)0)); | |
3885 | ||
d8a417b2 TL |
3886 | #if defined (DEBUG_FAILOVER_MESSAGES) |
3887 | if (status != ISC_R_SUCCESS) | |
3888 | failover_print (FMA, " (failed)"); | |
3889 | failover_print (FMA, ")"); | |
3890 | if (obufix) { | |
3891 | log_debug ("%s", obuf); | |
3892 | } | |
3893 | #endif | |
3894 | return status; | |
3895 | } | |
3896 | ||
007e3ee4 TL |
3897 | isc_result_t dhcp_failover_send_connectack (omapi_object_t *l, |
3898 | dhcp_failover_state_t *state, | |
3899 | int reason, const char *errmsg) | |
9f3da356 TL |
3900 | { |
3901 | dhcp_failover_link_t *link; | |
9f3da356 TL |
3902 | isc_result_t status; |
3903 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3904 | char obuf [64]; | |
3905 | unsigned obufix = 0; | |
3906 | ||
3907 | # define FMA obuf, &obufix, sizeof obuf | |
3908 | failover_print (FMA, "(connectack"); | |
3909 | #else | |
00c272ee | 3910 | # define FMA (char *)0, (unsigned *)0, 0 |
9f3da356 TL |
3911 | #endif |
3912 | ||
3913 | if (!l || l -> type != dhcp_type_failover_link) | |
3914 | return ISC_R_INVALIDARG; | |
3915 | link = (dhcp_failover_link_t *)l; | |
9f3da356 TL |
3916 | if (!l -> outer || l -> outer -> type != omapi_type_connection) |
3917 | return ISC_R_INVALIDARG; | |
dd53dc5a | 3918 | |
02ca1b45 TL |
3919 | status = |
3920 | (dhcp_failover_put_message | |
3921 | (link, l -> outer, | |
3922 | FTM_CONNECTACK, | |
3923 | (state | |
3924 | ? (dhcp_failover_make_option | |
3925 | (FTO_SERVER_ADDR, FMA, | |
3926 | state -> server_identifier.len, | |
3927 | state -> server_identifier.data)) | |
3928 | : &skip_failover_option), | |
3929 | (state | |
3930 | ? dhcp_failover_make_option (FTO_MAX_UNACKED, FMA, | |
3931 | state -> me.max_flying_updates) | |
3932 | : &skip_failover_option), | |
3933 | (state | |
3934 | ? dhcp_failover_make_option (FTO_RECEIVE_TIMER, FMA, | |
3935 | state -> me.max_response_delay) | |
3936 | : &skip_failover_option), | |
3937 | dhcp_failover_option_printf (FTO_VENDOR_CLASS, FMA, | |
3938 | "isc-%s", DHCP_VERSION), | |
3939 | dhcp_failover_make_option (FTO_PROTOCOL_VERSION, FMA, | |
3940 | DHCP_FAILOVER_VERSION), | |
3941 | dhcp_failover_make_option (FTO_TLS_REQUEST, FMA, | |
3942 | 0, 0), | |
3943 | (reason | |
3944 | ? dhcp_failover_make_option (FTO_REJECT_REASON, | |
3945 | FMA, reason) | |
3946 | : &skip_failover_option), | |
3947 | (errmsg | |
3948 | ? dhcp_failover_make_option (FTO_MESSAGE, FMA, | |
3949 | strlen (errmsg), errmsg) | |
3950 | : &skip_failover_option), | |
3951 | (failover_option_t *)0)); | |
9f3da356 TL |
3952 | |
3953 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3954 | if (status != ISC_R_SUCCESS) | |
3955 | failover_print (FMA, " (failed)"); | |
3956 | failover_print (FMA, ")"); | |
3957 | if (obufix) { | |
3958 | log_debug ("%s", obuf); | |
3959 | } | |
3960 | #endif | |
3961 | return status; | |
3962 | } | |
3963 | ||
3964 | isc_result_t dhcp_failover_send_disconnect (omapi_object_t *l, | |
3965 | int reason, | |
3966 | const char *message) | |
dd53dc5a TL |
3967 | { |
3968 | dhcp_failover_link_t *link; | |
3969 | dhcp_failover_state_t *state; | |
3970 | isc_result_t status; | |
3971 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
3972 | char obuf [64]; | |
3973 | unsigned obufix = 0; | |
3974 | ||
3975 | # define FMA obuf, &obufix, sizeof obuf | |
9f3da356 | 3976 | failover_print (FMA, "(disconnect"); |
dd53dc5a | 3977 | #else |
00c272ee | 3978 | # define FMA (char *)0, (unsigned *)0, 0 |
dd53dc5a TL |
3979 | #endif |
3980 | ||
9f3da356 TL |
3981 | if (!l || l -> type != dhcp_type_failover_link) |
3982 | return ISC_R_INVALIDARG; | |
3983 | link = (dhcp_failover_link_t *)l; | |
3984 | state = link -> state_object; | |
3985 | if (!l -> outer || l -> outer -> type != omapi_type_connection) | |
dd53dc5a TL |
3986 | return ISC_R_INVALIDARG; |
3987 | ||
8c8e27c5 TL |
3988 | if (!message && reason) |
3989 | message = dhcp_failover_reject_reason_print (reason); | |
3990 | ||
9f3da356 TL |
3991 | status = (dhcp_failover_put_message |
3992 | (link, l -> outer, | |
3993 | FTM_DISCONNECT, | |
3994 | dhcp_failover_make_option (FTO_REJECT_REASON, | |
3995 | FMA, reason), | |
3996 | (message | |
8c8e27c5 TL |
3997 | ? dhcp_failover_make_option (FTO_MESSAGE, FMA, |
3998 | strlen (message), message) | |
3999 | : &skip_failover_option), | |
9f3da356 TL |
4000 | (failover_option_t *)0)); |
4001 | ||
4002 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4003 | if (status != ISC_R_SUCCESS) | |
4004 | failover_print (FMA, " (failed)"); | |
4005 | failover_print (FMA, ")"); | |
4006 | if (obufix) { | |
4007 | log_debug ("%s", obuf); | |
4008 | } | |
4009 | #endif | |
4010 | return status; | |
4011 | } | |
4012 | ||
4013 | /* Send a Bind Update message. */ | |
4014 | ||
4015 | isc_result_t dhcp_failover_send_bind_update (dhcp_failover_state_t *state, | |
4016 | struct lease *lease) | |
4017 | { | |
4018 | dhcp_failover_link_t *link; | |
4019 | isc_result_t status; | |
4020 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4021 | char obuf [64]; | |
4022 | unsigned obufix = 0; | |
4023 | ||
4024 | # define FMA obuf, &obufix, sizeof obuf | |
4025 | failover_print (FMA, "(bndupd"); | |
4026 | #else | |
00c272ee | 4027 | # define FMA (char *)0, (unsigned *)0, 0 |
9f3da356 TL |
4028 | #endif |
4029 | ||
4030 | if (!state -> link_to_peer || | |
4031 | state -> link_to_peer -> type != dhcp_type_failover_link) | |
dd53dc5a | 4032 | return ISC_R_INVALIDARG; |
9f3da356 | 4033 | link = (dhcp_failover_link_t *)state -> link_to_peer; |
dd53dc5a TL |
4034 | |
4035 | if (!link -> outer || link -> outer -> type != omapi_type_connection) | |
4036 | return ISC_R_INVALIDARG; | |
4037 | ||
8c8e27c5 | 4038 | /* Send the update. */ |
dd53dc5a TL |
4039 | status = (dhcp_failover_put_message |
4040 | (link, link -> outer, | |
4041 | FTM_BNDUPD, | |
4042 | dhcp_failover_make_option (FTO_ASSIGNED_IP_ADDRESS, FMA, | |
85a53735 | 4043 | lease -> ip_addr.len, |
dd53dc5a TL |
4044 | lease -> ip_addr.iabuf), |
4045 | dhcp_failover_make_option (FTO_BINDING_STATUS, FMA, | |
007e3ee4 | 4046 | lease -> binding_state), |
dd53dc5a TL |
4047 | lease -> uid_len |
4048 | ? dhcp_failover_make_option (FTO_CLIENT_IDENTIFIER, FMA, | |
25a69ca1 TL |
4049 | lease -> uid_len, |
4050 | lease -> uid) | |
dd53dc5a | 4051 | : &skip_failover_option, |
8c8e27c5 TL |
4052 | lease -> hardware_addr.hlen |
4053 | ? dhcp_failover_make_option (FTO_CHADDR, FMA, | |
4054 | lease -> hardware_addr.hlen, | |
4055 | lease -> hardware_addr.hbuf) | |
4056 | : &skip_failover_option, | |
dd53dc5a TL |
4057 | dhcp_failover_make_option (FTO_LEASE_EXPIRY, FMA, |
4058 | lease -> ends), | |
4059 | dhcp_failover_make_option (FTO_POTENTIAL_EXPIRY, FMA, | |
4060 | lease -> tstp), | |
4061 | dhcp_failover_make_option (FTO_STOS, FMA, | |
4062 | lease -> starts), | |
4063 | dhcp_failover_make_option (FTO_CLTT, FMA, | |
4064 | lease -> cltt), | |
4065 | &skip_failover_option, /* XXX DDNS */ | |
4066 | &skip_failover_option, /* XXX request options */ | |
4067 | &skip_failover_option, /* XXX reply options */ | |
4068 | (failover_option_t *)0)); | |
4069 | ||
4070 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4071 | if (status != ISC_R_SUCCESS) | |
4072 | failover_print (FMA, " (failed)"); | |
4073 | failover_print (FMA, ")"); | |
4074 | if (obufix) { | |
4075 | log_debug ("%s", obuf); | |
4076 | } | |
4077 | #endif | |
4078 | return status; | |
4079 | } | |
4080 | ||
8c8e27c5 TL |
4081 | /* Send a Bind ACK message. */ |
4082 | ||
4083 | isc_result_t dhcp_failover_send_bind_ack (dhcp_failover_state_t *state, | |
8c8e27c5 TL |
4084 | failover_message_t *msg, |
4085 | int reason, const char *message) | |
4086 | { | |
4087 | dhcp_failover_link_t *link; | |
4088 | isc_result_t status; | |
4089 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4090 | char obuf [64]; | |
4091 | unsigned obufix = 0; | |
8c8e27c5 TL |
4092 | |
4093 | # define FMA obuf, &obufix, sizeof obuf | |
4094 | failover_print (FMA, "(bndack"); | |
4095 | #else | |
00c272ee | 4096 | # define FMA (char *)0, (unsigned *)0, 0 |
8c8e27c5 TL |
4097 | #endif |
4098 | ||
4099 | if (!state -> link_to_peer || | |
4100 | state -> link_to_peer -> type != dhcp_type_failover_link) | |
4101 | return ISC_R_INVALIDARG; | |
4102 | link = (dhcp_failover_link_t *)state -> link_to_peer; | |
4103 | ||
4104 | if (!link -> outer || link -> outer -> type != omapi_type_connection) | |
4105 | return ISC_R_INVALIDARG; | |
4106 | ||
8c8e27c5 TL |
4107 | if (!message && reason) |
4108 | message = dhcp_failover_reject_reason_print (reason); | |
4109 | ||
4110 | /* Send the update. */ | |
4111 | status = (dhcp_failover_put_message | |
4112 | (link, link -> outer, | |
4113 | FTM_BNDACK, | |
4114 | dhcp_failover_make_option (FTO_ASSIGNED_IP_ADDRESS, FMA, | |
6f0b9ed0 TL |
4115 | sizeof msg -> assigned_addr, |
4116 | &msg -> assigned_addr), | |
8c8e27c5 | 4117 | dhcp_failover_make_option (FTO_BINDING_STATUS, FMA, |
6f0b9ed0 TL |
4118 | msg -> binding_status), |
4119 | (msg -> options_present & FTB_CLIENT_IDENTIFIER) | |
8c8e27c5 | 4120 | ? dhcp_failover_make_option (FTO_CLIENT_IDENTIFIER, FMA, |
6f0b9ed0 TL |
4121 | msg -> client_identifier.count, |
4122 | msg -> client_identifier.data) | |
8c8e27c5 | 4123 | : &skip_failover_option, |
6f0b9ed0 | 4124 | (msg -> options_present & FTB_CHADDR) |
8c8e27c5 | 4125 | ? dhcp_failover_make_option (FTO_CHADDR, FMA, |
6f0b9ed0 TL |
4126 | msg -> chaddr.count, |
4127 | msg -> chaddr.data) | |
8c8e27c5 TL |
4128 | : &skip_failover_option, |
4129 | dhcp_failover_make_option (FTO_LEASE_EXPIRY, FMA, | |
4130 | msg -> expiry), | |
4131 | dhcp_failover_make_option (FTO_POTENTIAL_EXPIRY, FMA, | |
4132 | msg -> potential_expiry), | |
4133 | dhcp_failover_make_option (FTO_STOS, FMA, | |
4134 | msg -> stos), | |
4135 | dhcp_failover_make_option (FTO_CLTT, FMA, | |
4136 | msg -> client_ltt), | |
4137 | reason | |
4138 | ? dhcp_failover_make_option (FTO_REJECT_REASON, | |
4139 | FMA, reason) | |
4140 | : &skip_failover_option, | |
4141 | (message | |
4142 | ? dhcp_failover_make_option (FTO_MESSAGE, FMA, | |
4143 | strlen (message), message) | |
4144 | : &skip_failover_option), | |
4145 | &skip_failover_option, /* XXX DDNS */ | |
4146 | &skip_failover_option, /* XXX request options */ | |
4147 | &skip_failover_option, /* XXX reply options */ | |
4148 | (failover_option_t *)0)); | |
4149 | ||
4150 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4151 | if (status != ISC_R_SUCCESS) | |
4152 | failover_print (FMA, " (failed)"); | |
4153 | failover_print (FMA, ")"); | |
4154 | if (obufix) { | |
4155 | log_debug ("%s", obuf); | |
4156 | } | |
4157 | #endif | |
4158 | return status; | |
4159 | } | |
4160 | ||
4161 | isc_result_t dhcp_failover_send_poolreq (dhcp_failover_state_t *state) | |
4162 | { | |
4163 | dhcp_failover_link_t *link; | |
4164 | isc_result_t status; | |
4165 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4166 | char obuf [64]; | |
4167 | unsigned obufix = 0; | |
4168 | ||
4169 | # define FMA obuf, &obufix, sizeof obuf | |
4170 | failover_print (FMA, "(poolreq"); | |
4171 | #else | |
00c272ee | 4172 | # define FMA (char *)0, (unsigned *)0, 0 |
8c8e27c5 TL |
4173 | #endif |
4174 | ||
4175 | if (!state -> link_to_peer || | |
4176 | state -> link_to_peer -> type != dhcp_type_failover_link) | |
4177 | return ISC_R_INVALIDARG; | |
4178 | link = (dhcp_failover_link_t *)state -> link_to_peer; | |
4179 | ||
4180 | if (!link -> outer || link -> outer -> type != omapi_type_connection) | |
4181 | return ISC_R_INVALIDARG; | |
4182 | ||
4183 | status = (dhcp_failover_put_message | |
4184 | (link, link -> outer, | |
4185 | FTM_POOLREQ, | |
4186 | (failover_option_t *)0)); | |
4187 | ||
4188 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4189 | if (status != ISC_R_SUCCESS) | |
4190 | failover_print (FMA, " (failed)"); | |
4191 | failover_print (FMA, ")"); | |
4192 | if (obufix) { | |
4193 | log_debug ("%s", obuf); | |
4194 | } | |
4195 | #endif | |
4196 | return status; | |
4197 | } | |
4198 | ||
4199 | isc_result_t dhcp_failover_send_poolresp (dhcp_failover_state_t *state, | |
4200 | int leases) | |
4201 | { | |
4202 | dhcp_failover_link_t *link; | |
4203 | isc_result_t status; | |
4204 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4205 | char obuf [64]; | |
4206 | unsigned obufix = 0; | |
4207 | ||
4208 | # define FMA obuf, &obufix, sizeof obuf | |
007e3ee4 | 4209 | failover_print (FMA, "(poolresp"); |
8c8e27c5 | 4210 | #else |
00c272ee | 4211 | # define FMA (char *)0, (unsigned *)0, 0 |
8c8e27c5 TL |
4212 | #endif |
4213 | ||
4214 | if (!state -> link_to_peer || | |
4215 | state -> link_to_peer -> type != dhcp_type_failover_link) | |
4216 | return ISC_R_INVALIDARG; | |
4217 | link = (dhcp_failover_link_t *)state -> link_to_peer; | |
4218 | ||
4219 | if (!link -> outer || link -> outer -> type != omapi_type_connection) | |
4220 | return ISC_R_INVALIDARG; | |
4221 | ||
4222 | status = (dhcp_failover_put_message | |
4223 | (link, link -> outer, | |
4224 | FTM_POOLREQ, | |
4225 | dhcp_failover_make_option (FTO_ADDRESSES_TRANSFERRED, FMA, | |
4226 | leases), | |
4227 | (failover_option_t *)0)); | |
4228 | ||
4229 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4230 | if (status != ISC_R_SUCCESS) | |
4231 | failover_print (FMA, " (failed)"); | |
4232 | failover_print (FMA, ")"); | |
4233 | if (obufix) { | |
4234 | log_debug ("%s", obuf); | |
4235 | } | |
4236 | #endif | |
4237 | return status; | |
4238 | } | |
4239 | ||
5f0c7be1 TL |
4240 | isc_result_t dhcp_failover_send_update_request (dhcp_failover_state_t *state) |
4241 | { | |
4242 | dhcp_failover_link_t *link; | |
4243 | isc_result_t status; | |
4244 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4245 | char obuf [64]; | |
4246 | unsigned obufix = 0; | |
988c1ca7 | 4247 | |
5f0c7be1 TL |
4248 | # define FMA obuf, &obufix, sizeof obuf |
4249 | failover_print (FMA, "(updreq"); | |
4250 | #else | |
4251 | # define FMA (char *)0, (unsigned *)0, 0 | |
4252 | #endif | |
4253 | ||
4254 | if (!state -> link_to_peer || | |
4255 | state -> link_to_peer -> type != dhcp_type_failover_link) | |
4256 | return ISC_R_INVALIDARG; | |
4257 | link = (dhcp_failover_link_t *)state -> link_to_peer; | |
4258 | ||
4259 | if (!link -> outer || link -> outer -> type != omapi_type_connection) | |
4260 | return ISC_R_INVALIDARG; | |
4261 | ||
4262 | status = (dhcp_failover_put_message | |
4263 | (link, link -> outer, | |
4264 | FTM_UPDREQ, | |
5f0c7be1 TL |
4265 | (failover_option_t *)0)); |
4266 | ||
4267 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4268 | if (status != ISC_R_SUCCESS) | |
4269 | failover_print (FMA, " (failed)"); | |
4270 | failover_print (FMA, ")"); | |
4271 | if (obufix) { | |
4272 | log_debug ("%s", obuf); | |
4273 | } | |
4274 | #endif | |
4275 | return status; | |
4276 | } | |
4277 | ||
4278 | isc_result_t dhcp_failover_send_update_request_all (dhcp_failover_state_t | |
4279 | *state) | |
4280 | { | |
4281 | dhcp_failover_link_t *link; | |
4282 | isc_result_t status; | |
4283 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4284 | char obuf [64]; | |
4285 | unsigned obufix = 0; | |
4286 | ||
4287 | # define FMA obuf, &obufix, sizeof obuf | |
4288 | failover_print (FMA, "(updreqall"); | |
4289 | #else | |
4290 | # define FMA (char *)0, (unsigned *)0, 0 | |
4291 | #endif | |
4292 | ||
4293 | if (!state -> link_to_peer || | |
4294 | state -> link_to_peer -> type != dhcp_type_failover_link) | |
4295 | return ISC_R_INVALIDARG; | |
4296 | link = (dhcp_failover_link_t *)state -> link_to_peer; | |
4297 | ||
4298 | if (!link -> outer || link -> outer -> type != omapi_type_connection) | |
4299 | return ISC_R_INVALIDARG; | |
4300 | ||
4301 | status = (dhcp_failover_put_message | |
4302 | (link, link -> outer, | |
4303 | FTM_UPDREQALL, | |
5f0c7be1 TL |
4304 | (failover_option_t *)0)); |
4305 | ||
4306 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4307 | if (status != ISC_R_SUCCESS) | |
4308 | failover_print (FMA, " (failed)"); | |
4309 | failover_print (FMA, ")"); | |
4310 | if (obufix) { | |
4311 | log_debug ("%s", obuf); | |
4312 | } | |
4313 | #endif | |
4314 | return status; | |
4315 | } | |
4316 | ||
4317 | isc_result_t dhcp_failover_send_update_done (dhcp_failover_state_t *state) | |
4318 | { | |
4319 | dhcp_failover_link_t *link; | |
4320 | isc_result_t status; | |
4321 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4322 | char obuf [64]; | |
4323 | unsigned obufix = 0; | |
4324 | ||
4325 | # define FMA obuf, &obufix, sizeof obuf | |
4326 | failover_print (FMA, "(upddone"); | |
4327 | #else | |
4328 | # define FMA (char *)0, (unsigned *)0, 0 | |
4329 | #endif | |
4330 | ||
4331 | if (!state -> link_to_peer || | |
4332 | state -> link_to_peer -> type != dhcp_type_failover_link) | |
4333 | return ISC_R_INVALIDARG; | |
4334 | link = (dhcp_failover_link_t *)state -> link_to_peer; | |
4335 | ||
4336 | if (!link -> outer || link -> outer -> type != omapi_type_connection) | |
4337 | return ISC_R_INVALIDARG; | |
4338 | ||
4339 | status = (dhcp_failover_put_message | |
4340 | (link, link -> outer, | |
4341 | FTM_UPDDONE, | |
5f0c7be1 TL |
4342 | (failover_option_t *)0)); |
4343 | ||
4344 | #if defined (DEBUG_FAILOVER_MESSAGES) | |
4345 | if (status != ISC_R_SUCCESS) | |
4346 | failover_print (FMA, " (failed)"); | |
4347 | failover_print (FMA, ")"); | |
4348 | if (obufix) { | |
4349 | log_debug ("%s", obuf); | |
4350 | } | |
4351 | #endif | |
988c1ca7 DN |
4352 | |
4353 | /* There may be uncommitted leases at this point (since | |
4354 | dhcp_failover_process_bind_ack() doesn't commit leases); | |
4355 | commit the lease file. */ | |
4356 | commit_leases(); | |
4357 | ||
5f0c7be1 TL |
4358 | return status; |
4359 | } | |
4360 | ||
8c8e27c5 TL |
4361 | isc_result_t dhcp_failover_process_bind_update (dhcp_failover_state_t *state, |
4362 | failover_message_t *msg) | |
4363 | { | |
20916cae | 4364 | struct lease *lt, *lease; |
8c8e27c5 | 4365 | struct iaddr ia; |
20916cae TL |
4366 | int reason = FTR_MISC_REJECT; |
4367 | const char *message; | |
007e3ee4 | 4368 | int new_binding_state; |
8c8e27c5 TL |
4369 | |
4370 | ia.len = sizeof msg -> assigned_addr; | |
4371 | memcpy (ia.iabuf, &msg -> assigned_addr, ia.len); | |
4372 | ||
20916cae | 4373 | lease = (struct lease *)0; |
6f0b9ed0 | 4374 | lt = (struct lease *)0; |
20916cae TL |
4375 | if (!find_lease_by_ip_addr (&lease, ia, MDL)) { |
4376 | message = "unknown IP address"; | |
4377 | reason = FTR_ILLEGAL_IP_ADDR; | |
4378 | goto bad; | |
8c8e27c5 TL |
4379 | } |
4380 | ||
4381 | /* XXX check for conflicts. */ | |
4382 | ||
4383 | /* Install the new info. */ | |
20916cae TL |
4384 | if (!lease_copy (<, lease, MDL)) { |
4385 | message = "no memory"; | |
4386 | goto bad; | |
4387 | } | |
8c8e27c5 TL |
4388 | |
4389 | if (msg -> options_present & FTB_CHADDR) { | |
20916cae TL |
4390 | if (msg -> chaddr.count > sizeof lt -> hardware_addr.hbuf) { |
4391 | message = "chaddr to long"; | |
4392 | goto bad; | |
8c8e27c5 | 4393 | } |
20916cae TL |
4394 | lt -> hardware_addr.hlen = msg -> chaddr.count; |
4395 | memcpy (lt -> hardware_addr.hbuf, msg -> chaddr.data, | |
8c8e27c5 TL |
4396 | msg -> chaddr.count); |
4397 | } | |
4398 | ||
4399 | if (msg -> options_present & FTB_CLIENT_IDENTIFIER) { | |
20916cae TL |
4400 | lt -> uid_len = msg -> client_identifier.count; |
4401 | if (lt -> uid_len > sizeof lt -> uid_buf) { | |
4402 | lt -> uid_max = lt -> uid_len; | |
4403 | lt -> uid = dmalloc (lt -> uid_len, MDL); | |
4404 | if (!lt -> uid) { | |
4405 | message = "no memory"; | |
4406 | goto bad; | |
4407 | } | |
8c8e27c5 | 4408 | } else { |
20916cae TL |
4409 | lt -> uid_max = sizeof lt -> uid_buf; |
4410 | lt -> uid = lt -> uid_buf; | |
8c8e27c5 | 4411 | } |
20916cae TL |
4412 | memcpy (lt -> uid, |
4413 | msg -> client_identifier.data, lt -> uid_len); | |
8c8e27c5 TL |
4414 | } |
4415 | ||
4416 | /* XXX Times may need to be adjusted based on clock skew! */ | |
4417 | if (msg -> options_present & FTB_STOS) { | |
20916cae | 4418 | lt -> starts = msg -> stos; |
8c8e27c5 TL |
4419 | } |
4420 | if (msg -> options_present & FTB_LEASE_EXPIRY) { | |
20916cae | 4421 | lt -> ends = msg -> expiry; |
8c8e27c5 TL |
4422 | } |
4423 | if (msg -> options_present & FTB_CLTT) { | |
20916cae | 4424 | lt -> cltt = msg -> client_ltt; |
8c8e27c5 TL |
4425 | } |
4426 | if (msg -> options_present & FTB_POTENTIAL_EXPIRY) { | |
20916cae | 4427 | lt -> tsfp = msg -> potential_expiry; |
8c8e27c5 TL |
4428 | } |
4429 | ||
4430 | if (msg -> options_present & FTB_BINDING_STATUS) { | |
d758ad8c TL |
4431 | #if defined (DEBUG_LEASE_STATE_TRANSITIONS) |
4432 | log_info ("processing state transition for %s: %s to %s", | |
4433 | piaddr (lease -> ip_addr), | |
4434 | binding_state_print (lease -> binding_state), | |
4435 | binding_state_print (msg -> binding_status)); | |
4436 | #endif | |
4437 | ||
5f0c7be1 TL |
4438 | /* If we're in normal state, make sure the state transition |
4439 | we got is valid. */ | |
02ca1b45 | 4440 | if (state -> me.state == normal) { |
da292833 TL |
4441 | new_binding_state = |
4442 | (normal_binding_state_transition_check | |
31bbee78 TL |
4443 | (lease, state, msg -> binding_status, |
4444 | msg -> potential_expiry)); | |
d758ad8c TL |
4445 | /* XXX if the transition the peer asked for isn't |
4446 | XXX allowed, maybe we should make the transition | |
4447 | XXX into potential-conflict at this point. */ | |
da292833 TL |
4448 | } else { |
4449 | new_binding_state = | |
4450 | (conflict_binding_state_transition_check | |
31bbee78 TL |
4451 | (lease, state, msg -> binding_status, |
4452 | msg -> potential_expiry)); | |
da292833 TL |
4453 | } |
4454 | if (new_binding_state != msg -> binding_status) { | |
4455 | char outbuf [100]; | |
4456 | #if !defined (NO_SNPRINTF) | |
4457 | snprintf (outbuf, sizeof outbuf, | |
4458 | "%s: invalid state transition: %s to %s", | |
4459 | piaddr (lease -> ip_addr), | |
4460 | binding_state_print (lease -> binding_state), | |
4461 | binding_state_print (msg -> binding_status)); | |
5f236d89 | 4462 | #else |
da292833 TL |
4463 | sprintf (outbuf, |
4464 | "%s: invalid state transition: %s to %s", | |
4465 | piaddr (lease -> ip_addr), | |
4466 | binding_state_print (lease -> binding_state), | |
4467 | binding_state_print (msg -> binding_status)); | |
5f236d89 | 4468 | #endif |
da292833 TL |
4469 | dhcp_failover_send_bind_ack (state, msg, |
4470 | FTR_FATAL_CONFLICT, | |
4471 | outbuf); | |
4472 | goto out; | |
8c8e27c5 | 4473 | } |
d758ad8c TL |
4474 | if (new_binding_state == FTS_EXPIRED || |
4475 | new_binding_state == FTS_RELEASED || | |
4476 | new_binding_state == FTS_RESET) | |
4477 | lt -> next_binding_state = FTS_FREE; | |
4478 | else | |
4479 | lt -> next_binding_state = new_binding_state; | |
4480 | msg -> binding_status = lt -> next_binding_state; | |
8c8e27c5 TL |
4481 | } |
4482 | ||
4483 | /* Try to install the new information. */ | |
988c1ca7 DN |
4484 | if (!supersede_lease (lease, lt, 0, 0, 0) || |
4485 | !write_lease (lease)) { | |
20916cae TL |
4486 | message = "database update failed"; |
4487 | bad: | |
988c1ca7 | 4488 | dhcp_failover_send_bind_ack (state, msg, reason, message); |
d758ad8c TL |
4489 | } else { |
4490 | ||
988c1ca7 | 4491 | dhcp_failover_queue_ack (state, msg); |
d758ad8c | 4492 | } |
988c1ca7 | 4493 | |
54bdf6c7 | 4494 | out: |
20916cae TL |
4495 | if (lt) |
4496 | lease_dereference (<, MDL); | |
6f0b9ed0 TL |
4497 | if (lease) |
4498 | lease_dereference (&lease, MDL); | |
8c8e27c5 | 4499 | |
9f3da356 TL |
4500 | return ISC_R_SUCCESS; |
4501 | } | |
4502 | ||
8c8e27c5 TL |
4503 | isc_result_t dhcp_failover_process_bind_ack (dhcp_failover_state_t *state, |
4504 | failover_message_t *msg) | |
4505 | { | |
6f0b9ed0 TL |
4506 | struct lease *lt = (struct lease *)0; |
4507 | struct lease *lease = (struct lease *)0; | |
8c8e27c5 | 4508 | struct iaddr ia; |
20916cae | 4509 | const char *message = "no memory"; |
8c8e27c5 TL |
4510 | |
4511 | ia.len = sizeof msg -> assigned_addr; | |
4512 | memcpy (ia.iabuf, &msg -> assigned_addr, ia.len); | |
4513 | ||
20916cae TL |
4514 | if (!find_lease_by_ip_addr (&lease, ia, MDL)) { |
4515 | message = "no such lease"; | |
4516 | goto bad; | |
8c8e27c5 TL |
4517 | } |
4518 | ||
4519 | /* XXX check for conflicts. */ | |
6f0b9ed0 TL |
4520 | if (msg -> options_present & FTB_REJECT_REASON) { |
4521 | log_error ("bind update on %s from %s rejected: %.*s", | |
4522 | piaddr (ia), state -> name, | |
4523 | (int)((msg -> options_present & FTB_MESSAGE) | |
4524 | ? msg -> message.count | |
4525 | : strlen (dhcp_failover_reject_reason_print | |
4526 | (msg -> reject_reason))), | |
4527 | (msg -> options_present & FTB_MESSAGE) | |
4528 | ? (const char *)(msg -> message.data) | |
4529 | : (dhcp_failover_reject_reason_print | |
4530 | (msg -> reject_reason))); | |
4531 | goto unqueue; | |
4532 | } | |
8c8e27c5 | 4533 | |
8c8e27c5 TL |
4534 | /* XXX Times may need to be adjusted based on clock skew! */ |
4535 | if (msg -> options_present & FTB_POTENTIAL_EXPIRY) { | |
da292833 TL |
4536 | /* XXX it could be a problem to do this directly if the |
4537 | XXX lease is sorted by tsfp. */ | |
d758ad8c TL |
4538 | if ((lease -> binding_state == FTS_EXPIRED || |
4539 | lease -> binding_state == FTS_RESET || | |
4540 | lease -> binding_state == FTS_RELEASED) && | |
4541 | (msg -> options_present & FTB_BINDING_STATUS) && | |
4542 | msg -> binding_status == FTS_FREE) | |
4543 | { | |
4544 | lease -> tsfp = msg -> potential_expiry; | |
31bbee78 | 4545 | lease -> next_binding_state = FTS_FREE; |
d758ad8c TL |
4546 | supersede_lease (lease, (struct lease *)0, 0, 0, 0); |
4547 | write_lease (lease); | |
4548 | if (state -> me.state == normal) | |
4549 | commit_leases (); | |
31bbee78 | 4550 | } else { |
d758ad8c TL |
4551 | lease -> tsfp = msg -> potential_expiry; |
4552 | write_lease (lease); | |
31bbee78 | 4553 | #if 0 /* XXX This might be needed. */ |
d758ad8c TL |
4554 | if (state -> me.state == normal) |
4555 | commit_leases (); | |
31bbee78 TL |
4556 | #endif |
4557 | } | |
8c8e27c5 TL |
4558 | } |
4559 | ||
6f0b9ed0 | 4560 | unqueue: |
8c8e27c5 TL |
4561 | dhcp_failover_ack_queue_remove (state, lease); |
4562 | ||
5f0c7be1 TL |
4563 | /* If we are supposed to send an update done after we send |
4564 | this lease, go ahead and send it. */ | |
4565 | if (state -> send_update_done == lease) { | |
4566 | lease_dereference (&state -> send_update_done, MDL); | |
4567 | dhcp_failover_send_update_done (state); | |
4568 | } | |
4569 | ||
8c8e27c5 TL |
4570 | /* If there are updates pending, we've created space to send at |
4571 | least one. */ | |
4572 | dhcp_failover_send_updates (state); | |
4573 | ||
20916cae TL |
4574 | out: |
4575 | lease_dereference (&lease, MDL); | |
4576 | if (lt) | |
4577 | lease_dereference (<, MDL); | |
4578 | ||
9f3da356 | 4579 | return ISC_R_SUCCESS; |
20916cae TL |
4580 | |
4581 | bad: | |
4582 | log_info ("bind update on %s from %s: %s.", | |
4583 | piaddr (ia), state -> name, message); | |
4584 | goto out; | |
9f3da356 TL |
4585 | } |
4586 | ||
5f0c7be1 TL |
4587 | isc_result_t dhcp_failover_generate_update_queue (dhcp_failover_state_t *state, |
4588 | int everythingp) | |
4589 | { | |
4590 | struct shared_network *s; | |
4591 | struct pool *p; | |
4592 | struct lease *l, *n; | |
4593 | int i; | |
4594 | struct lease **lptr [5]; | |
4595 | #define FREE_LEASES 0 | |
4596 | #define ACTIVE_LEASES 1 | |
4597 | #define EXPIRED_LEASES 2 | |
4598 | #define ABANDONED_LEASES 3 | |
4599 | #define BACKUP_LEASES 4 | |
4600 | ||
4601 | /* First remove everything from the update and ack queues. */ | |
4602 | l = n = (struct lease *)0; | |
4603 | if (state -> update_queue_head) { | |
4604 | lease_reference (&l, state -> update_queue_head, MDL); | |
4605 | lease_dereference (&state -> update_queue_head, MDL); | |
4606 | do { | |
4607 | l -> flags &= ~ON_UPDATE_QUEUE; | |
da292833 | 4608 | if (l -> next_pending) { |
5f0c7be1 TL |
4609 | lease_reference (&n, |
4610 | l -> next_pending, MDL); | |
da292833 TL |
4611 | lease_dereference (&l -> next_pending, MDL); |
4612 | } | |
5f0c7be1 TL |
4613 | lease_dereference (&l, MDL); |
4614 | if (n) { | |
4615 | lease_reference (&l, n, MDL); | |
4616 | lease_dereference (&n, MDL); | |
4617 | } | |
4618 | } while (l); | |
4619 | lease_dereference (&state -> update_queue_tail, MDL); | |
4620 | } | |
4621 | ||
4622 | if (state -> ack_queue_head) { | |
4623 | lease_reference (&l, state -> ack_queue_head, MDL); | |
4624 | lease_dereference (&state -> ack_queue_head, MDL); | |
4625 | do { | |
4626 | l -> flags &= ~ON_ACK_QUEUE; | |
da292833 | 4627 | if (l -> next_pending) { |
5f0c7be1 TL |
4628 | lease_reference (&n, |
4629 | l -> next_pending, MDL); | |
da292833 TL |
4630 | lease_dereference (&l -> next_pending, MDL); |
4631 | } | |
5f0c7be1 TL |
4632 | lease_dereference (&l, MDL); |
4633 | if (n) { | |
4634 | lease_reference (&l, n, MDL); | |
4635 | lease_dereference (&n, MDL); | |
4636 | } | |
4637 | } while (l); | |
4638 | lease_dereference (&state -> ack_queue_tail, MDL); | |
4639 | } | |
4640 | if (state -> send_update_done) | |
4641 | lease_dereference (&state -> send_update_done, MDL); | |
4642 | ||
4643 | /* Loop through each pool in each shared network and call the | |
4644 | expiry routine on the pool. */ | |
4645 | for (s = shared_networks; s; s = s -> next) { | |
4646 | for (p = s -> pools; p; p = p -> next) { | |
4647 | lptr [FREE_LEASES] = &p -> free; | |
4648 | lptr [ACTIVE_LEASES] = &p -> active; | |
4649 | lptr [EXPIRED_LEASES] = &p -> expired; | |
4650 | lptr [ABANDONED_LEASES] = &p -> abandoned; | |
4651 | lptr [BACKUP_LEASES] = &p -> backup; | |
4652 | ||
4653 | for (i = FREE_LEASES; i <= BACKUP_LEASES; i++) { | |
4654 | for (l = *(lptr [i]); l; l = l -> next) { | |
4655 | if (p -> failover_peer == state && | |
da292833 TL |
4656 | ((everythingp && |
4657 | (l -> starts != MIN_TIME || | |
4658 | l -> ends != MIN_TIME)) || | |
5f0c7be1 TL |
4659 | l -> tstp > l -> tsfp)) { |
4660 | dhcp_failover_queue_update (l, 0); | |
4661 | } | |
4662 | } | |
4663 | } | |
4664 | } | |
4665 | } | |
4666 | return ISC_R_SUCCESS; | |
4667 | } | |
4668 | ||
4669 | isc_result_t | |
4670 | dhcp_failover_process_update_request (dhcp_failover_state_t *state, | |
4671 | failover_message_t *msg) | |
4672 | { | |
5f0c7be1 TL |
4673 | /* Generate a fresh update queue. */ |
4674 | dhcp_failover_generate_update_queue (state, 0); | |
4675 | ||
4676 | /* If there's anything on the update queue (there shouldn't be | |
4677 | anything on the ack queue), trigger an update done message | |
4678 | when we get an ack for that lease. */ | |
4679 | if (state -> update_queue_tail) { | |
4680 | lease_reference (&state -> send_update_done, | |
4681 | state -> update_queue_tail, MDL); | |
4682 | dhcp_failover_send_updates (state); | |
4683 | } else { | |
4684 | /* Otherwise, there are no updates to send, so we can | |
4685 | just send an UPDDONE message immediately. */ | |
4686 | dhcp_failover_send_update_done (state); | |
4687 | } | |
4688 | ||
4689 | return ISC_R_SUCCESS; | |
4690 | } | |
4691 | ||
4692 | isc_result_t | |
4693 | dhcp_failover_process_update_request_all (dhcp_failover_state_t *state, | |
4694 | failover_message_t *msg) | |
4695 | { | |
5f0c7be1 TL |
4696 | /* Generate a fresh update queue that includes every lease. */ |
4697 | dhcp_failover_generate_update_queue (state, 1); | |
4698 | ||
4699 | if (state -> update_queue_tail) { | |
4700 | lease_reference (&state -> send_update_done, | |
4701 | state -> update_queue_tail, MDL); | |
4702 | dhcp_failover_send_updates (state); | |
4703 | } else { | |
4704 | /* This should really never happen, but it could happen | |
4705 | on a server that currently has no leases configured. */ | |
4706 | dhcp_failover_send_update_done (state); | |
4707 | } | |
4708 | ||
4709 | return ISC_R_SUCCESS; | |
4710 | } | |
4711 | ||
4712 | isc_result_t | |
4713 | dhcp_failover_process_update_done (dhcp_failover_state_t *state, | |
fd273e02 | 4714 | failover_message_t *msg) |
5f0c7be1 | 4715 | { |
755acf88 TL |
4716 | log_info ("failover peer %s: peer update completed.", |
4717 | state -> name); | |
4718 | ||
02ca1b45 | 4719 | switch (state -> me.state) { |
5f0c7be1 TL |
4720 | case unknown_state: |
4721 | case partner_down: | |
4722 | case normal: | |
4723 | case communications_interrupted: | |
4724 | case resolution_interrupted: | |
4725 | case shut_down: | |
4726 | case paused: | |
4727 | case recover_done: | |
d9539882 | 4728 | case startup: |
fd273e02 | 4729 | case recover_wait: |
5f0c7be1 TL |
4730 | break; /* shouldn't happen. */ |
4731 | ||
4732 | /* We got the UPDDONE, so we can go into normal state! */ | |
4733 | case potential_conflict: | |
4734 | dhcp_failover_set_state (state, normal); | |
4735 | break; | |
4736 | ||
4737 | case recover: | |
37d8bfeb TL |
4738 | /* Wait for MCLT to expire before moving to recover_done, |
4739 | except that if both peers come up in recover, there is | |
4740 | no point in waiting for MCLT to expire - this probably | |
4741 | indicates the initial startup of a newly-configured | |
4742 | failover pair. */ | |
4743 | if (state -> me.stos + state -> mclt > cur_time && | |
4744 | state -> partner.state != recover && | |
4745 | state -> partner.state != recover_done) { | |
fd273e02 | 4746 | dhcp_failover_set_state (state, recover_wait); |
0db87765 TL |
4747 | #if defined (DEBUG_FAILOVER_TIMING) |
4748 | log_info ("add_timeout +%d %s", | |
4749 | (int)(cur_time - | |
4750 | state -> me.stos + state -> mclt), | |
4751 | "dhcp_failover_recover_done"); | |
4752 | #endif | |
02ca1b45 | 4753 | add_timeout ((int)(state -> me.stos + state -> mclt), |
5f0c7be1 TL |
4754 | dhcp_failover_recover_done, |
4755 | state, | |
4756 | (tvref_t)omapi_object_reference, | |
4757 | (tvunref_t) | |
4758 | omapi_object_dereference); | |
da292833 | 4759 | } else |
5f0c7be1 TL |
4760 | dhcp_failover_recover_done (state); |
4761 | } | |
4762 | ||
4763 | return ISC_R_SUCCESS; | |
4764 | } | |
4765 | ||
4766 | void dhcp_failover_recover_done (void *sp) | |
4767 | { | |
4768 | dhcp_failover_state_t *state = sp; | |
4769 | ||
0db87765 TL |
4770 | #if defined (DEBUG_FAILOVER_TIMING) |
4771 | log_info ("dhcp_failover_recover_done"); | |
4772 | #endif | |
4773 | ||
5f0c7be1 TL |
4774 | dhcp_failover_set_state (state, recover_done); |
4775 | } | |
4776 | ||
d8a417b2 TL |
4777 | #if defined (DEBUG_FAILOVER_MESSAGES) |
4778 | /* Print hunks of failover messages, doing line breaks as appropriate. | |
4779 | Note that this assumes syslog is being used, rather than, e.g., the | |
4780 | Windows NT logging facility, where just dumping the whole message in | |
4781 | one hunk would be more appropriate. */ | |
4782 | ||
4783 | void failover_print (char *obuf, | |
4784 | unsigned *obufix, unsigned obufmax, const char *s) | |
4785 | { | |
4786 | int len = strlen (s); | |
4787 | ||
9f3da356 TL |
4788 | while (len + *obufix + 1 >= obufmax) { |
4789 | log_debug ("%s", obuf); | |
d8a417b2 TL |
4790 | if (!*obufix) { |
4791 | log_debug ("%s", s); | |
9f3da356 | 4792 | *obufix = 0; |
d8a417b2 TL |
4793 | return; |
4794 | } | |
d8a417b2 | 4795 | *obufix = 0; |
d8a417b2 | 4796 | } |
9f3da356 TL |
4797 | strcpy (&obuf [*obufix], s); |
4798 | *obufix += len; | |
d8a417b2 TL |
4799 | } |
4800 | #endif /* defined (DEBUG_FAILOVER_MESSAGES) */ | |
d50d0b82 | 4801 | |
85a53735 TL |
4802 | /* Taken from draft-ietf-dhc-loadb-01.txt: */ |
4803 | /* A "mixing table" of 256 distinct values, in pseudo-random order. */ | |
4804 | unsigned char loadb_mx_tbl[256] = { | |
4805 | 251, 175, 119, 215, 81, 14, 79, 191, 103, 49, | |
4806 | 181, 143, 186, 157, 0, 232, 31, 32, 55, 60, | |
4807 | 152, 58, 17, 237, 174, 70, 160, 144, 220, 90, | |
4808 | 57, 223, 59, 3, 18, 140, 111, 166, 203, 196, | |
4809 | 134, 243, 124, 95, 222, 179, 197, 65, 180, 48, | |
4810 | 36, 15, 107, 46, 233, 130, 165, 30, 123, 161, | |
4811 | 209, 23, 97, 16, 40, 91, 219, 61, 100, 10, | |
4812 | 210, 109, 250, 127, 22, 138, 29, 108, 244, 67, | |
4813 | 207, 9, 178, 204, 74, 98, 126, 249, 167, 116, | |
4814 | 34, 77, 193, 200, 121, 5, 20, 113, 71, 35, | |
4815 | 128, 13, 182, 94, 25, 226, 227, 199, 75, 27, | |
4816 | 41, 245, 230, 224, 43, 225, 177, 26, 155, 150, | |
4817 | 212, 142, 218, 115, 241, 73, 88, 105, 39, 114, | |
4818 | 62, 255, 192, 201, 145, 214, 168, 158, 221, 148, | |
4819 | 154, 122, 12, 84, 82, 163, 44, 139, 228, 236, | |
4820 | 205, 242, 217, 11, 187, 146, 159, 64, 86, 239, | |
4821 | 195, 42, 106, 198, 118, 112, 184, 172, 87, 2, | |
4822 | 173, 117, 176, 229, 247, 253, 137, 185, 99, 164, | |
4823 | 102, 147, 45, 66, 231, 52, 141, 211, 194, 206, | |
4824 | 246, 238, 56, 110, 78, 248, 63, 240, 189, 93, | |
4825 | 92, 51, 53, 183, 19, 171, 72, 50, 33, 104, | |
4826 | 101, 69, 8, 252, 83, 120, 76, 135, 85, 54, | |
4827 | 202, 125, 188, 213, 96, 235, 136, 208, 162, 129, | |
4828 | 190, 132, 156, 38, 47, 1, 7, 254, 24, 4, | |
4829 | 216, 131, 89, 21, 28, 133, 37, 153, 149, 80, | |
4830 | 170, 68, 6, 169, 234, 151 }; | |
4831 | ||
4832 | static unsigned char loadb_p_hash (const unsigned char *, unsigned); | |
4833 | static unsigned char loadb_p_hash (const unsigned char *key, unsigned len) | |
4834 | { | |
4835 | unsigned char hash = len; | |
4836 | int i; | |
4837 | for(i = len; i > 0; ) | |
4838 | hash = loadb_mx_tbl [hash ^ (key [--i])]; | |
4839 | return hash; | |
4840 | } | |
4841 | ||
4842 | int load_balance_mine (struct packet *packet, dhcp_failover_state_t *state) | |
4843 | { | |
4844 | struct option_cache *oc; | |
4845 | struct data_string ds; | |
4846 | unsigned char hbaix; | |
4847 | int hm; | |
4848 | ||
4849 | if (state -> load_balance_max_secs < ntohs (packet -> raw -> secs)) { | |
4850 | return 1; | |
4851 | } | |
4852 | ||
007e3ee4 TL |
4853 | /* If we don't have a hash bucket array, we can't tell if this |
4854 | one's ours, so we assume it's not. */ | |
4855 | if (!state -> hba) | |
4856 | return 0; | |
4857 | ||
85a53735 TL |
4858 | oc = lookup_option (&dhcp_universe, packet -> options, |
4859 | DHO_DHCP_CLIENT_IDENTIFIER); | |
4860 | memset (&ds, 0, sizeof ds); | |
4861 | if (oc && | |
4862 | evaluate_option_cache (&ds, packet, (struct lease *)0, | |
9e383163 | 4863 | (struct client_state *)0, |
85a53735 TL |
4864 | packet -> options, (struct option_state *)0, |
4865 | &global_scope, oc, MDL)) { | |
4866 | hbaix = loadb_p_hash (ds.data, ds.len); | |
4867 | } else { | |
4868 | hbaix = loadb_p_hash (packet -> raw -> chaddr, | |
4869 | packet -> raw -> hlen); | |
4870 | } | |
4871 | hm = (state -> hba [hbaix / 8] & (1 << (hbaix & 3))); | |
4872 | if (state -> i_am == primary) | |
4873 | return hm; | |
4874 | else | |
4875 | return !hm; | |
4876 | } | |
20916cae | 4877 | |
da292833 TL |
4878 | /* This deals with what to do with bind updates when |
4879 | we're in the normal state | |
4880 | ||
4881 | Note that tsfp had better be set from the latest bind update | |
4882 | _before_ this function is called! */ | |
4883 | ||
4884 | binding_state_t | |
4885 | normal_binding_state_transition_check (struct lease *lease, | |
4886 | dhcp_failover_state_t *state, | |
31bbee78 TL |
4887 | binding_state_t binding_state, |
4888 | u_int32_t tsfp) | |
007e3ee4 | 4889 | { |
da292833 TL |
4890 | binding_state_t new_state; |
4891 | ||
007e3ee4 TL |
4892 | /* If there is no transition, it's no problem. */ |
4893 | if (binding_state == lease -> binding_state) | |
4894 | return binding_state; | |
4895 | ||
007e3ee4 TL |
4896 | switch (lease -> binding_state) { |
4897 | case FTS_FREE: | |
4898 | case FTS_ABANDONED: | |
4899 | switch (binding_state) { | |
4900 | case FTS_ACTIVE: | |
4901 | case FTS_ABANDONED: | |
4902 | case FTS_BACKUP: | |
4903 | case FTS_RESERVED: | |
4904 | case FTS_BOOTP: | |
4905 | /* If the lease was free, and our peer is primary, | |
4906 | then it can make it active, or abandoned, or | |
4907 | backup. Abandoned is treated like free in | |
4908 | this case. */ | |
4909 | if (state -> i_am == secondary) | |
4910 | return binding_state; | |
4911 | ||
d758ad8c TL |
4912 | /* Otherwise, it can't legitimately do any sort of |
4913 | state transition. Because the lease was free, | |
4914 | and the error has already been made, we allow the | |
4915 | peer to change its state anyway, but log a warning | |
4916 | message in hopes that the error will be fixed. */ | |
007e3ee4 TL |
4917 | case FTS_FREE: /* for compiler */ |
4918 | case FTS_EXPIRED: | |
4919 | case FTS_RELEASED: | |
4920 | case FTS_RESET: | |
d758ad8c TL |
4921 | log_error ("allowing %s%s: %s to %s", |
4922 | "invalid peer state transition on ", | |
4923 | piaddr (lease -> ip_addr), | |
4924 | (binding_state_print | |
4925 | (lease -> binding_state)), | |
4926 | binding_state_print (binding_state)); | |
4927 | new_state = binding_state; | |
da292833 | 4928 | goto out; |
007e3ee4 TL |
4929 | } |
4930 | case FTS_ACTIVE: | |
4931 | case FTS_RESERVED: | |
4932 | case FTS_BOOTP: | |
4933 | /* The secondary can't change the state of an active | |
4934 | lease. */ | |
da292833 TL |
4935 | if (state -> i_am == primary) { |
4936 | new_state = lease -> binding_state; | |
4937 | goto out; | |
4938 | } | |
007e3ee4 TL |
4939 | |
4940 | /* So this is only for transitions made by the primary: */ | |
4941 | switch (binding_state) { | |
4942 | case FTS_FREE: | |
4943 | case FTS_BACKUP: | |
4944 | /* Can't set a lease to free or backup until the | |
4945 | peer agrees that it's expired. */ | |
31bbee78 | 4946 | if (tsfp > cur_time) { |
da292833 TL |
4947 | new_state = lease -> binding_state; |
4948 | goto out; | |
4949 | } | |
007e3ee4 TL |
4950 | return binding_state; |
4951 | ||
4952 | case FTS_EXPIRED: | |
da292833 TL |
4953 | if (lease -> ends > cur_time) { |
4954 | new_state = lease -> binding_state; | |
4955 | goto out; | |
4956 | } | |
007e3ee4 TL |
4957 | |
4958 | case FTS_RESERVED: | |
4959 | case FTS_BOOTP: | |
4960 | case FTS_RELEASED: | |
4961 | case FTS_ABANDONED: | |
4962 | case FTS_RESET: | |
4963 | case FTS_ACTIVE: | |
4964 | return binding_state; | |
4965 | ||
4966 | } | |
d758ad8c | 4967 | break; |
007e3ee4 TL |
4968 | case FTS_EXPIRED: |
4969 | switch (binding_state) { | |
007e3ee4 | 4970 | case FTS_BACKUP: |
d758ad8c | 4971 | case FTS_FREE: |
007e3ee4 TL |
4972 | /* Can't set a lease to free or backup until the |
4973 | peer agrees that it's expired. */ | |
31bbee78 | 4974 | if (tsfp > cur_time) { |
da292833 TL |
4975 | new_state = lease -> binding_state; |
4976 | goto out; | |
4977 | } | |
007e3ee4 TL |
4978 | return binding_state; |
4979 | ||
4980 | case FTS_RESERVED: | |
4981 | case FTS_BOOTP: | |
4982 | case FTS_ACTIVE: | |
4983 | case FTS_RELEASED: | |
4984 | case FTS_ABANDONED: | |
4985 | case FTS_RESET: | |
4986 | case FTS_EXPIRED: | |
4987 | return binding_state; | |
4988 | } | |
4989 | case FTS_RELEASED: | |
4990 | switch (binding_state) { | |
4991 | case FTS_FREE: | |
4992 | case FTS_BACKUP: | |
007e3ee4 | 4993 | |
a609e69b TL |
4994 | /* These are invalid state transitions - should we |
4995 | prevent them? */ | |
007e3ee4 TL |
4996 | case FTS_RESERVED: |
4997 | case FTS_BOOTP: | |
4998 | case FTS_EXPIRED: | |
4999 | case FTS_ABANDONED: | |
5000 | case FTS_RESET: | |
5001 | case FTS_ACTIVE: | |
5002 | case FTS_RELEASED: | |
5003 | return binding_state; | |
5004 | } | |
5005 | case FTS_RESET: | |
5006 | switch (binding_state) { | |
5007 | case FTS_FREE: | |
5008 | case FTS_BACKUP: | |
5009 | /* Can't set a lease to free or backup until the | |
5010 | peer agrees that it's expired. */ | |
31bbee78 | 5011 | if (tsfp > cur_time) { |
da292833 TL |
5012 | new_state = lease -> binding_state; |
5013 | goto out; | |
5014 | } | |
007e3ee4 TL |
5015 | return binding_state; |
5016 | ||
5017 | case FTS_ACTIVE: | |
5018 | case FTS_RESERVED: | |
5019 | case FTS_BOOTP: | |
5020 | case FTS_EXPIRED: | |
5021 | case FTS_RELEASED: | |
5022 | case FTS_ABANDONED: | |
5023 | case FTS_RESET: | |
5024 | return binding_state; | |
5025 | } | |
5026 | case FTS_BACKUP: | |
5027 | switch (binding_state) { | |
5028 | case FTS_ACTIVE: | |
5029 | case FTS_ABANDONED: | |
5030 | case FTS_FREE: | |
5031 | case FTS_RESERVED: | |
5032 | case FTS_BOOTP: | |
5033 | /* If the lease was in backup, and our peer is | |
5034 | secondary, then it can make it active, or | |
5035 | abandoned, or free. */ | |
5036 | if (state -> i_am == primary) | |
5037 | return binding_state; | |
5038 | ||
5039 | /* Otherwise, it can't do any sort of state | |
d758ad8c TL |
5040 | transition, but because the lease was free |
5041 | we allow it to do the transition, and just | |
5042 | log the error. */ | |
007e3ee4 TL |
5043 | case FTS_EXPIRED: |
5044 | case FTS_RELEASED: | |
5045 | case FTS_RESET: | |
d758ad8c TL |
5046 | log_error ("allowing %s%s: %s to %s", |
5047 | "invalid peer state transition on ", | |
5048 | piaddr (lease -> ip_addr), | |
5049 | (binding_state_print | |
5050 | (lease -> binding_state)), | |
5051 | binding_state_print (binding_state)); | |
5052 | new_state = binding_state; | |
da292833 | 5053 | goto out; |
007e3ee4 TL |
5054 | |
5055 | case FTS_BACKUP: | |
da292833 TL |
5056 | new_state = lease -> binding_state; |
5057 | goto out; | |
5058 | } | |
5059 | } | |
5060 | out: | |
5061 | return new_state; | |
5062 | } | |
5063 | ||
5064 | /* Determine whether the state transition is okay when we're potentially | |
5065 | in conflict with the peer. */ | |
5066 | binding_state_t | |
5067 | conflict_binding_state_transition_check (struct lease *lease, | |
5068 | dhcp_failover_state_t *state, | |
31bbee78 TL |
5069 | binding_state_t binding_state, |
5070 | u_int32_t tsfp) | |
da292833 TL |
5071 | { |
5072 | binding_state_t new_state; | |
5073 | ||
5074 | /* If there is no transition, it's no problem. */ | |
5075 | if (binding_state == lease -> binding_state) | |
5076 | new_state = binding_state; | |
5077 | else { | |
5078 | switch (lease -> binding_state) { | |
5079 | /* If we think the lease is not in use, then the | |
5080 | state into which the partner put it is just fine, | |
5081 | whatever it is. */ | |
5082 | case FTS_FREE: | |
5083 | case FTS_ABANDONED: | |
5084 | case FTS_EXPIRED: | |
5085 | case FTS_RELEASED: | |
5086 | case FTS_RESET: | |
5087 | case FTS_BACKUP: | |
5088 | new_state = binding_state; | |
5089 | break; | |
5090 | ||
5091 | /* If we think the lease *is* in use, then we're not | |
5092 | going to take the partner's change if the partner | |
5093 | thinks it's free. */ | |
5094 | case FTS_ACTIVE: | |
5095 | case FTS_RESERVED: | |
5096 | case FTS_BOOTP: | |
5097 | switch (binding_state) { | |
5098 | case FTS_FREE: | |
5099 | case FTS_BACKUP: | |
5100 | case FTS_ABANDONED: | |
5101 | new_state = lease -> binding_state; | |
5102 | break; | |
5103 | ||
5104 | case FTS_EXPIRED: | |
5105 | case FTS_RELEASED: | |
5106 | case FTS_RESET: | |
5107 | if (lease -> ends > cur_time) | |
5108 | new_state = | |
5109 | lease -> binding_state; | |
5110 | else | |
5111 | new_state = binding_state; | |
5112 | break; | |
5113 | ||
5114 | case FTS_RESERVED: | |
5115 | case FTS_BOOTP: | |
5116 | case FTS_ACTIVE: | |
5117 | new_state = binding_state; | |
5118 | break; | |
5119 | } | |
5120 | break; | |
007e3ee4 TL |
5121 | } |
5122 | } | |
da292833 | 5123 | return new_state; |
007e3ee4 TL |
5124 | } |
5125 | ||
5f0c7be1 TL |
5126 | /* We can reallocate a lease under the following circumstances: |
5127 | ||
5128 | (1) It belongs to us - it's FTS_FREE, and we're primary, or it's | |
5129 | FTS_BACKUP, and we're secondary. | |
5130 | (2) We're in partner_down, and the lease is not active, and we | |
5131 | can be sure that the other server didn't make it active. | |
5132 | We can only be sure that the server didn't make it active | |
5133 | when we are in the partner_down state and one of the following | |
5134 | two conditions holds: | |
5135 | (a) in the case that the time sent from the peer is earlier than | |
5136 | the time we entered the partner_down state, at least MCLT has | |
5137 | gone by since we entered partner_down, or | |
5138 | (b) in the case that the time sent from the peer is later than | |
5139 | the time when we entered partner_down, the current time is | |
5140 | later than the time sent from the peer by at least MCLT. */ | |
5141 | ||
5142 | int lease_mine_to_reallocate (struct lease *lease) | |
007e3ee4 TL |
5143 | { |
5144 | dhcp_failover_state_t *peer; | |
5145 | ||
5146 | if (lease && lease -> pool && | |
5147 | lease -> pool -> failover_peer) { | |
5148 | peer = lease -> pool -> failover_peer; | |
5f0c7be1 TL |
5149 | switch (lease -> binding_state) { |
5150 | case FTS_ACTIVE: | |
5151 | return 0; | |
5152 | ||
5153 | case FTS_FREE: | |
5154 | if (peer -> i_am == primary) | |
5155 | return 1; | |
5156 | if (peer -> service_state == service_partner_down && | |
02ca1b45 TL |
5157 | (lease -> tsfp < peer -> me.stos |
5158 | ? peer -> me.stos + peer -> mclt < cur_time | |
5f0c7be1 TL |
5159 | : lease -> tsfp + peer -> mclt < cur_time)) |
5160 | return 1; | |
5161 | return 0; | |
5162 | ||
5163 | case FTS_ABANDONED: | |
5164 | case FTS_RESET: | |
5165 | case FTS_RELEASED: | |
5166 | case FTS_EXPIRED: | |
5167 | case FTS_BOOTP: | |
5168 | case FTS_RESERVED: | |
5169 | if (peer -> service_state == service_partner_down && | |
02ca1b45 TL |
5170 | (lease -> tsfp < peer -> me.stos |
5171 | ? peer -> me.stos + peer -> mclt < cur_time | |
5f0c7be1 TL |
5172 | : lease -> tsfp + peer -> mclt < cur_time)) |
5173 | return 1; | |
5174 | return 0; | |
5175 | case FTS_BACKUP: | |
5176 | if (peer -> i_am == secondary) | |
5177 | return 1; | |
5178 | if (peer -> service_state == service_partner_down && | |
02ca1b45 TL |
5179 | (lease -> tsfp < peer -> me.stos |
5180 | ? peer -> me.stos + peer -> mclt < cur_time | |
5f0c7be1 TL |
5181 | : lease -> tsfp + peer -> mclt < cur_time)) |
5182 | return 1; | |
5183 | return 0; | |
007e3ee4 | 5184 | } |
5f0c7be1 | 5185 | return 0; |
007e3ee4 | 5186 | } |
d588b01f TL |
5187 | if (lease) |
5188 | return !(lease -> binding_state != FTS_FREE && | |
5189 | lease -> binding_state != FTS_BACKUP); | |
5190 | else | |
5191 | return 0; | |
007e3ee4 TL |
5192 | } |
5193 | ||
988c1ca7 DN |
5194 | static isc_result_t failover_message_reference (failover_message_t **mp, |
5195 | failover_message_t *m, | |
5196 | const char *file, int line) | |
5197 | { | |
5198 | *mp = m; | |
5199 | m -> refcnt++; | |
5200 | return ISC_R_SUCCESS; | |
5201 | } | |
5202 | ||
5203 | static isc_result_t failover_message_dereference (failover_message_t **mp, | |
5204 | const char *file, int line) | |
5205 | { | |
d758ad8c TL |
5206 | failover_message_t *m; |
5207 | m = (*mp); | |
5208 | m -> refcnt--; | |
5209 | if (m -> refcnt == 0) { | |
5210 | if (m -> next) | |
5211 | failover_message_dereference (&m -> next, | |
5212 | file, line); | |
5213 | if (m -> chaddr.data) | |
5214 | dfree (m -> chaddr.data, file, line); | |
5215 | if (m -> client_identifier.data) | |
5216 | dfree (m -> client_identifier.data, file, line); | |
5217 | if (m -> hba.data) | |
5218 | dfree (m -> hba.data, file, line); | |
5219 | if (m -> message.data) | |
5220 | dfree (m -> message.data, file, line); | |
5221 | if (m -> reply_options.data) | |
5222 | dfree (m -> reply_options.data, file, line); | |
5223 | if (m -> request_options.data) | |
5224 | dfree (m -> request_options.data, file, line); | |
5225 | if (m -> vendor_class.data) | |
5226 | dfree (m -> vendor_class.data, file, line); | |
5227 | if (m -> vendor_options.data) | |
5228 | dfree (m -> vendor_options.data, file, line); | |
5229 | if (m -> ddns.data) | |
5230 | dfree (m -> ddns.data, file, line); | |
5231 | dfree (*mp, file, line); | |
988c1ca7 | 5232 | } |
fa0b4709 | 5233 | *mp = 0; |
988c1ca7 DN |
5234 | return ISC_R_SUCCESS; |
5235 | } | |
5236 | ||
20916cae TL |
5237 | OMAPI_OBJECT_ALLOC (dhcp_failover_state, dhcp_failover_state_t, |
5238 | dhcp_type_failover_state) | |
5239 | OMAPI_OBJECT_ALLOC (dhcp_failover_listener, dhcp_failover_listener_t, | |
5240 | dhcp_type_failover_listener) | |
5241 | OMAPI_OBJECT_ALLOC (dhcp_failover_link, dhcp_failover_link_t, | |
5242 | dhcp_type_failover_link) | |
c68d2a87 | 5243 | #endif /* defined (FAILOVER_PROTOCOL) */ |
da292833 | 5244 | |
da292833 TL |
5245 | const char *binding_state_print (enum failover_state state) |
5246 | { | |
5247 | switch (state) { | |
5248 | case FTS_FREE: | |
5249 | return "free"; | |
5250 | break; | |
5251 | ||
5252 | case FTS_ACTIVE: | |
5253 | return "active"; | |
5254 | break; | |
5255 | ||
5256 | case FTS_EXPIRED: | |
5257 | return "expired"; | |
5258 | break; | |
5259 | ||
5260 | case FTS_RELEASED: | |
5261 | return "released"; | |
5262 | break; | |
5263 | ||
5264 | case FTS_ABANDONED: | |
5265 | return "abandoned"; | |
5266 | break; | |
5267 | ||
5268 | case FTS_RESET: | |
5269 | return "reset"; | |
5270 | break; | |
5271 | ||
5272 | case FTS_BACKUP: | |
5273 | return "backup"; | |
5274 | break; | |
5275 | ||
5276 | case FTS_RESERVED: | |
5277 | return "reserved"; | |
5278 | break; | |
5279 | ||
5280 | case FTS_BOOTP: | |
5281 | return "bootp"; | |
5282 | break; | |
5283 | ||
5284 | default: | |
5285 | return "unknown"; | |
5286 | break; | |
5287 | } | |
5288 | } |