Upgrade isc-dhcp, e.g. dhclient.
[dragonfly.git] / contrib / isc-dhcp / includes / dhcpd.h
1 /* dhcpd.h
2
3    Definitions for dhcpd... */
4
5 /*
6  * Copyright (c) 1996-2001 Internet Software Consortium.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
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.
21  *
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''.
42  *
43  * $FreeBSD: src/contrib/isc-dhcp/includes/dhcpd.h,v 1.8 2003/09/02 11:13:21 mbr Exp $
44  * $DragonFly: src/contrib/isc-dhcp/includes/Attic/dhcpd.h,v 1.2 2003/10/11 21:14:19 dillon Exp $
45  */
46
47 #ifndef __CYGWIN32__
48 #include <sys/types.h>
49 #include <netinet/in.h>
50 #include <sys/socket.h>
51 #include <sys/un.h>
52 #include <arpa/inet.h>
53
54 #include <netdb.h>
55 #else
56 #define fd_set cygwin_fd_set
57 #include <sys/types.h>
58 #endif
59 #include <fcntl.h>
60 #include <stdio.h>
61 #include <unistd.h>
62 #include <string.h>
63 #include <stdlib.h>
64 #include <sys/stat.h>
65 #include <ctype.h>
66 #include <time.h>
67
68 #include "cdefs.h"
69 #include "osdep.h"
70
71 #include "arpa/nameser.h"
72 #if defined (NSUPDATE)
73 # include "minires/minires.h"
74 #endif
75
76 struct hash_table;
77 typedef struct hash_table group_hash_t;
78 typedef struct hash_table universe_hash_t;
79 typedef struct hash_table option_hash_t;
80 typedef struct hash_table dns_zone_hash_t;
81 typedef struct hash_table lease_hash_t;
82 typedef struct hash_table host_hash_t;
83 typedef struct hash_table class_hash_t;
84
85 #include "dhcp.h"
86 #include "statement.h"
87 #include "tree.h"
88 #include "inet.h"
89 #include "dhctoken.h"
90
91 #include <isc-dhcp/result.h>
92 #include <omapip/omapip_p.h>
93
94 #if !defined (OPTION_HASH_SIZE)
95 # define OPTION_HASH_SIZE 17
96 # define OPTION_HASH_PTWO 32    /* Next power of two above option hash. */
97 # define OPTION_HASH_EXP 5      /* The exponent for that power of two. */
98 #endif
99
100 #define compute_option_hash(x) \
101         (((x) & (OPTION_HASH_PTWO - 1)) + \
102          (((x) >> OPTION_HASH_EXP) & \
103           (OPTION_HASH_PTWO - 1))) % OPTION_HASH_SIZE;
104
105 #define NOLINK 0
106 #define HAVELINK 1
107
108 enum dhcp_shutdown_state {
109         shutdown_listeners,
110         shutdown_omapi_connections,
111         shutdown_drop_omapi_connections,
112         shutdown_dhcp,
113         shutdown_done
114 };
115
116 /* Client FQDN option, failover FQDN option, etc. */
117 typedef struct {
118         u_int8_t codes [2];
119         unsigned length;
120         u_int8_t *data;
121 } ddns_fqdn_t;
122
123 #include "failover.h"
124
125 /* A parsing context. */
126
127 struct parse {
128         int lexline;
129         int lexchar;
130         char *token_line;
131         char *prev_line;
132         char *cur_line;
133         const char *tlname;
134         int eol_token;
135
136         char line1 [81];
137         char line2 [81];
138         int lpos;
139         int line;
140         int tlpos;
141         int tline;
142         enum dhcp_token token;
143         int ugflag;
144         char *tval;
145         int tlen;
146         char tokbuf [1500];
147
148 #ifdef OLD_LEXER
149         char comments [4096];
150         int comment_index;
151 #endif
152         int warnings_occurred;
153         int file;
154         char *inbuf;
155         unsigned bufix, buflen;
156         unsigned bufsiz;
157 };
158
159 /* Variable-length array of data. */
160
161 struct string_list {
162         struct string_list *next;
163         char string [1];
164 };
165
166 /* A name server, from /etc/resolv.conf. */
167 struct name_server {
168         struct name_server *next;
169         struct sockaddr_in addr;
170         TIME rcdate;
171 };
172
173 /* A domain search list element. */
174 struct domain_search_list {
175         struct domain_search_list *next;
176         char *domain;
177         TIME rcdate;
178 };
179
180 /* Option tag structures are used to build chains of option tags, for
181    when we're sure we're not going to have enough of them to justify
182    maintaining an array. */
183
184 struct option_tag {
185         struct option_tag *next;
186         u_int8_t data [1];
187 };
188
189 /* An agent option structure.   We need a special structure for the
190    Relay Agent Information option because if more than one appears in
191    a message, we have to keep them seperate. */
192
193 struct agent_options {
194         struct agent_options *next;
195         int length;
196         struct option_tag *first;
197 };
198
199 struct option_cache {
200         int refcnt;
201         struct option_cache *next;
202         struct expression *expression;
203         struct option *option;
204         struct data_string data;
205 };
206
207 struct option_state {
208         int refcnt;
209         int universe_count;
210         int site_universe;
211         int site_code_min;
212         VOIDPTR universes [1];
213 };
214
215 /* A dhcp packet and the pointers to its option values. */
216 struct packet {
217         struct dhcp_packet *raw;
218         int refcnt;
219         unsigned packet_length;
220         int packet_type;
221         int options_valid;
222         int client_port;
223         struct iaddr client_addr;
224         struct interface_info *interface;       /* Interface on which packet
225                                                    was received. */
226         struct hardware *haddr;         /* Physical link address
227                                            of local sender (maybe gateway). */
228
229         /* Information for relay agent options (see
230            draft-ietf-dhc-agent-options-xx.txt). */
231         u_int8_t *circuit_id;           /* Circuit ID of client connection. */
232         int circuit_id_len;
233         u_int8_t *remote_id;            /* Remote ID of client. */
234         int remote_id_len;
235
236         int got_requested_address;      /* True if client sent the
237                                            dhcp-requested-address option. */
238
239         struct shared_network *shared_network;
240         struct option_state *options;
241
242 #if !defined (PACKET_MAX_CLASSES)
243 # define PACKET_MAX_CLASSES 5
244 #endif
245         int class_count;
246         struct class *classes [PACKET_MAX_CLASSES];
247
248         int known;
249         int authenticated;
250 };
251
252 /* A network interface's MAC address. */
253
254 struct hardware {
255         u_int8_t hlen;
256         u_int8_t hbuf [17];
257 };
258
259 typedef enum {
260         server_startup = 0,
261         server_running = 1,
262         server_shutdown = 2,
263         server_hibernate = 3,
264         server_awaken = 4
265 } control_object_state_t;
266
267 typedef struct {
268         OMAPI_OBJECT_PREAMBLE;
269         control_object_state_t state;
270 } dhcp_control_object_t;
271
272 /* Lease states: */
273 typedef enum {
274         FTS_FREE = 1,
275         FTS_ACTIVE = 2,
276         FTS_EXPIRED = 3,
277         FTS_RELEASED = 4,
278         FTS_ABANDONED = 5,
279         FTS_RESET = 6,
280         FTS_BACKUP = 7
281 } binding_state_t;
282
283 /* FTS_LAST is the highest value that is valid for a lease binding state. */
284 #define FTS_LAST FTS_BACKUP
285
286 /* A dhcp lease declaration structure. */
287 struct lease {
288         OMAPI_OBJECT_PREAMBLE;
289         struct lease *next;
290         struct lease *n_uid, *n_hw;
291
292         struct iaddr ip_addr;
293         TIME starts, ends, timestamp, sort_time;
294         char *client_hostname;
295         struct binding_scope *scope;
296         struct host_decl *host;
297         struct subnet *subnet;
298         struct pool *pool;
299         struct class *billing_class;
300         struct option_chain_head *agent_options;
301
302         struct executable_statement *on_expiry;
303         struct executable_statement *on_commit;
304         struct executable_statement *on_release;
305
306         unsigned char *uid;
307         unsigned short uid_len;
308         unsigned short uid_max;
309         unsigned char uid_buf [7];
310         struct hardware hardware_addr;
311
312         u_int8_t flags;
313 #       define STATIC_LEASE             1
314 #       define BOOTP_LEASE              2
315 #       define PERSISTENT_FLAGS         (ON_ACK_QUEUE | ON_UPDATE_QUEUE)
316 #       define MS_NULL_TERMINATION      8
317 #       define ON_UPDATE_QUEUE          16
318 #       define ON_ACK_QUEUE             32
319 #       define UNICAST_BROADCAST_HACK   64
320 #       define ON_DEFERRED_QUEUE        128
321 #       define EPHEMERAL_FLAGS          (MS_NULL_TERMINATION | \
322                                          UNICAST_BROADCAST_HACK)
323
324         binding_state_t __attribute__ ((mode (__byte__))) binding_state;
325         binding_state_t __attribute__ ((mode (__byte__))) next_binding_state;
326         binding_state_t __attribute__ ((mode (__byte__))) desired_binding_state;
327         
328         struct lease_state *state;
329
330         TIME tstp;      /* Time sent to partner. */
331         TIME tsfp;      /* Time sent from partner. */
332         TIME cltt;      /* Client last transaction time. */
333         struct lease *next_pending;
334 };
335
336 struct lease_state {
337         struct lease_state *next;
338
339         struct interface_info *ip;
340
341         struct packet *packet;  /* The incoming packet. */
342
343         TIME offered_expiry;
344
345         struct option_state *options;
346         struct data_string parameter_request_list;
347         int max_message_size;
348         u_int32_t expiry, renewal, rebind;
349         struct data_string filename, server_name;
350         int got_requested_address;
351         int got_server_identifier;
352         struct shared_network *shared_network;  /* Shared network of interface
353                                                    on which request arrived. */
354
355         u_int32_t xid;
356         u_int16_t secs;
357         u_int16_t bootp_flags;
358         struct in_addr ciaddr;
359         struct in_addr siaddr;
360         struct in_addr giaddr;
361         u_int8_t hops;
362         u_int8_t offer;
363         struct iaddr from;
364 };
365
366 #define ROOT_GROUP      0
367 #define HOST_DECL       1
368 #define SHARED_NET_DECL 2
369 #define SUBNET_DECL     3
370 #define CLASS_DECL      4
371 #define GROUP_DECL      5
372 #define POOL_DECL       6
373
374 /* Possible modes in which discover_interfaces can run. */
375
376 #define DISCOVER_RUNNING        0
377 #define DISCOVER_SERVER         1
378 #define DISCOVER_UNCONFIGURED   2
379 #define DISCOVER_RELAY          3
380 #define DISCOVER_REQUESTED      4
381
382 /* Server option names. */
383
384 #define SV_DEFAULT_LEASE_TIME           1
385 #define SV_MAX_LEASE_TIME               2
386 #define SV_MIN_LEASE_TIME               3
387 #define SV_BOOTP_LEASE_CUTOFF           4
388 #define SV_BOOTP_LEASE_LENGTH           5
389 #define SV_BOOT_UNKNOWN_CLIENTS         6
390 #define SV_DYNAMIC_BOOTP                7
391 #define SV_ALLOW_BOOTP                  8
392 #define SV_ALLOW_BOOTING                9
393 #define SV_ONE_LEASE_PER_CLIENT         10
394 #define SV_GET_LEASE_HOSTNAMES          11
395 #define SV_USE_HOST_DECL_NAMES          12
396 #define SV_USE_LEASE_ADDR_FOR_DEFAULT_ROUTE     13
397 #define SV_MIN_SECS                     14
398 #define SV_FILENAME                     15
399 #define SV_SERVER_NAME                  16
400 #define SV_NEXT_SERVER                  17
401 #define SV_AUTHORITATIVE                18
402 #define SV_VENDOR_OPTION_SPACE          19
403 #define SV_ALWAYS_REPLY_RFC1048         20
404 #define SV_SITE_OPTION_SPACE            21
405 #define SV_ALWAYS_BROADCAST             22
406 #define SV_DDNS_DOMAIN_NAME             23
407 #define SV_DDNS_HOST_NAME               24
408 #define SV_DDNS_REV_DOMAIN_NAME         25
409 #define SV_LEASE_FILE_NAME              26
410 #define SV_PID_FILE_NAME                27
411 #define SV_DUPLICATES                   28
412 #define SV_DECLINES                     29
413 #define SV_DDNS_UPDATES                 30
414 #define SV_OMAPI_PORT                   31
415 #define SV_LOCAL_PORT                   32
416 #define SV_LIMITED_BROADCAST_ADDRESS    33
417 #define SV_REMOTE_PORT                  34
418 #define SV_LOCAL_ADDRESS                35
419 #define SV_OMAPI_KEY                    36
420 #define SV_STASH_AGENT_OPTIONS          37
421 #define SV_DDNS_TTL                     38
422 #define SV_DDNS_UPDATE_STYLE            39
423 #define SV_CLIENT_UPDATES               40
424 #define SV_UPDATE_OPTIMIZATION          41
425 #define SV_PING_CHECKS                  42
426 #define SV_UPDATE_STATIC_LEASES         43
427 #define SV_LOG_FACILITY                 44
428 #define SV_DO_FORWARD_UPDATES           45
429 #define SV_PING_TIMEOUT         46
430
431 #if !defined (DEFAULT_PING_TIMEOUT)
432 # define DEFAULT_PING_TIMEOUT 1
433 #endif
434
435 #if !defined (DEFAULT_DEFAULT_LEASE_TIME)
436 # define DEFAULT_DEFAULT_LEASE_TIME 43200
437 #endif
438
439 #if !defined (DEFAULT_MIN_LEASE_TIME)
440 # define DEFAULT_MIN_LEASE_TIME 0
441 #endif
442
443 #if !defined (DEFAULT_MAX_LEASE_TIME)
444 # define DEFAULT_MAX_LEASE_TIME 86400
445 #endif
446
447 #if !defined (DEFAULT_DDNS_TTL)
448 # define DEFAULT_DDNS_TTL 3600
449 #endif
450
451 /* Client option names */
452
453 #define CL_TIMEOUT              1
454 #define CL_SELECT_INTERVAL      2
455 #define CL_REBOOT_TIMEOUT       3
456 #define CL_RETRY_INTERVAL       4
457 #define CL_BACKOFF_CUTOFF       5
458 #define CL_INITIAL_INTERVAL     6
459 #define CL_BOOTP_POLICY         7
460 #define CL_SCRIPT_NAME          8
461 #define CL_REQUESTED_OPTIONS    9
462 #define CL_REQUESTED_LEASE_TIME 10
463 #define CL_SEND_OPTIONS         11
464 #define CL_MEDIA                12
465 #define CL_REJECT_LIST          13
466
467 #ifndef CL_DEFAULT_TIMEOUT
468 # define CL_DEFAULT_TIMEOUT     60
469 #endif
470
471 #ifndef CL_DEFAULT_SELECT_INTERVAL
472 # define CL_DEFAULT_SELECT_INTERVAL 0
473 #endif
474
475 #ifndef CL_DEFAULT_REBOOT_TIMEOUT
476 # define CL_DEFAULT_REBOOT_TIMEOUT 10
477 #endif
478
479 #ifndef CL_DEFAULT_RETRY_INTERVAL
480 # define CL_DEFAULT_RETRY_INTERVAL 300
481 #endif
482
483 #ifndef CL_DEFAULT_BACKOFF_CUTOFF
484 # define CL_DEFAULT_BACKOFF_CUTOFF 120
485 #endif
486
487 #ifndef CL_DEFAULT_INITIAL_INTERVAL
488 # define CL_DEFAULT_INITIAL_INTERVAL 10
489 #endif
490
491 #ifndef CL_DEFAULT_BOOTP_POLICY
492 # define CL_DEFAULT_BOOTP_POLICY P_ACCEPT
493 #endif
494
495 #ifndef CL_DEFAULT_REQUESTED_OPTIONS
496 # define CL_DEFAULT_REQUESTED_OPTIONS \
497         { DHO_SUBNET_MASK, \
498           DHO_BROADCAST_ADDRESS, \
499           DHO_TIME_OFFSET, \
500           DHO_ROUTERS, \
501           DHO_DOMAIN_NAME, \
502           DHO_DOMAIN_NAME_SERVERS, \
503           DHO_HOST_NAME }
504 #endif
505
506 struct group_object {
507         OMAPI_OBJECT_PREAMBLE;
508
509         struct group_object *n_dynamic;
510         struct group *group;
511         char *name;
512         int flags;
513 #define GROUP_OBJECT_DELETED    1
514 #define GROUP_OBJECT_DYNAMIC    2
515 #define GROUP_OBJECT_STATIC     4
516 };
517
518 /* Group of declarations that share common parameters. */
519 struct group {
520         struct group *next;
521
522         int refcnt;
523         struct group_object *object;
524         struct subnet *subnet;
525         struct shared_network *shared_network;
526         int authoritative;
527         struct executable_statement *statements;
528 };
529
530 /* A dhcp host declaration structure. */
531 struct host_decl {
532         OMAPI_OBJECT_PREAMBLE;
533         struct host_decl *n_ipaddr;
534         struct host_decl *n_dynamic;
535         char *name;
536         struct hardware interface;
537         struct data_string client_identifier;
538         struct option_cache *fixed_addr;
539         struct group *group;
540         struct group_object *named_group;
541         struct data_string auth_key_id;
542         int flags;
543 #define HOST_DECL_DELETED       1
544 #define HOST_DECL_DYNAMIC       2
545 #define HOST_DECL_STATIC        4
546 };
547
548 struct permit {
549         struct permit *next;
550         enum {
551                 permit_unknown_clients,
552                 permit_known_clients,
553                 permit_authenticated_clients,
554                 permit_unauthenticated_clients,
555                 permit_all_clients,
556                 permit_dynamic_bootp_clients,
557                 permit_class
558         } type;
559         struct class *class;
560 };
561
562 struct pool {
563         OMAPI_OBJECT_PREAMBLE;
564         struct pool *next;
565         struct group *group;
566         struct shared_network *shared_network;
567         struct permit *permit_list;
568         struct permit *prohibit_list;
569         struct lease *active;
570         struct lease *expired;
571         struct lease *free;
572         struct lease *backup;
573         struct lease *abandoned;
574         TIME next_event_time;
575         int lease_count;
576         int free_leases;
577         int backup_leases;
578         int index;
579 #if defined (FAILOVER_PROTOCOL)
580         dhcp_failover_state_t *failover_peer;
581 #endif
582 };
583
584 struct shared_network {
585         OMAPI_OBJECT_PREAMBLE;
586         struct shared_network *next;
587         char *name;
588         struct subnet *subnets;
589         struct interface_info *interface;
590         struct pool *pools;
591         struct group *group;
592 #if defined (FAILOVER_PROTOCOL)
593         dhcp_failover_state_t *failover_peer;
594 #endif
595 };
596
597 struct subnet {
598         OMAPI_OBJECT_PREAMBLE;
599         struct subnet *next_subnet;
600         struct subnet *next_sibling;
601         struct shared_network *shared_network;
602         struct interface_info *interface;
603         struct iaddr interface_address;
604         struct iaddr net;
605         struct iaddr netmask;
606
607         struct group *group;
608 };
609
610 struct collection {
611         struct collection *next;
612         
613         const char *name;
614         struct class *classes;
615 };
616
617 /* XXX classes must be reference-counted. */
618 struct class {
619         OMAPI_OBJECT_PREAMBLE;
620         struct class *nic;              /* Next in collection. */
621         struct class *superclass;       /* Set for spawned classes only. */
622         char *name;                     /* Not set for spawned classes. */
623
624         /* A class may be configured to permit a limited number of leases. */
625         int lease_limit;
626         int leases_consumed;
627         struct lease **billed_leases;
628
629         /* If nonzero, class has not been saved since it was last
630            modified. */
631         int dirty;
632
633         /* Hash table containing subclasses. */
634         class_hash_t *hash;
635         struct data_string hash_string;
636
637         /* Expression used to match class. */
638         struct expression *expr;
639
640         /* Expression used to compute subclass identifiers for spawning
641            and to do subclass matching. */
642         struct expression *submatch;
643         int spawning;
644         
645         struct group *group;
646
647         /* Statements to execute if class matches. */
648         struct executable_statement *statements;
649 };
650
651 /* DHCP client lease structure... */
652 struct client_lease {
653         struct client_lease *next;                    /* Next lease in list. */
654         TIME expiry, renewal, rebind;                     /* Lease timeouts. */
655         struct iaddr address;                       /* Address being leased. */
656         char *server_name;                           /* Name of boot server. */
657         char *filename;              /* Name of file we're supposed to boot. */
658         struct string_list *medium;                       /* Network medium. */
659         struct auth_key *key;      /* Key used in basic DHCP authentication. */
660
661         unsigned int is_static : 1;    /* If set, lease is from config file. */
662         unsigned int is_bootp: 1;  /* If set, lease was acquired with BOOTP. */
663
664         struct option_state *options;        /* Options supplied with lease. */
665 };
666
667 /* Possible states in which the client can be. */
668 enum dhcp_state {
669         S_REBOOTING = 1,
670         S_INIT = 2,
671         S_SELECTING = 3,
672         S_REQUESTING = 4, 
673         S_BOUND = 5,
674         S_RENEWING = 6,
675         S_REBINDING = 7,
676         S_STOPPED = 8
677 };
678
679 /* Authentication and BOOTP policy possibilities (not all values work
680    for each). */
681 enum policy { P_IGNORE, P_ACCEPT, P_PREFER, P_REQUIRE, P_DONT };
682
683 /* Configuration information from the config file... */
684 struct client_config {
685         /*
686          * When a message has been received, run these statements
687          * over it.
688          */
689         struct group *on_receipt;
690
691         /*
692          * When a message is sent, run these statements.
693          */
694         struct group *on_transmission;
695
696         u_int32_t *required_options; /* Options server must supply. */
697         u_int32_t *requested_options; /* Options to request from server. */
698
699         TIME timeout;                   /* Start to panic if we don't get a
700                                            lease in this time period when
701                                            SELECTING. */
702         TIME initial_interval;          /* All exponential backoff intervals
703                                            start here. */
704         TIME retry_interval;            /* If the protocol failed to produce
705                                            an address before the timeout,
706                                            try the protocol again after this
707                                            many seconds. */
708         TIME select_interval;           /* Wait this many seconds from the
709                                            first DHCPDISCOVER before
710                                            picking an offered lease. */
711         TIME reboot_timeout;            /* When in INIT-REBOOT, wait this
712                                            long before giving up and going
713                                            to INIT. */
714         TIME backoff_cutoff;            /* When doing exponential backoff,
715                                            never back off to an interval
716                                            longer than this amount. */
717         u_int32_t requested_lease;      /* Requested lease time, if user
718                                            doesn't configure one. */
719         struct string_list *media;      /* Possible network media values. */
720         char *script_name;              /* Name of config script. */
721         char *vendor_space_name;        /* Name of config script. */
722         enum policy bootp_policy;
723                                         /* Ignore, accept or prefer BOOTP
724                                            responses. */
725         enum policy auth_policy;
726                                         /* Require authentication, prefer
727                                            authentication, or don't try to
728                                            authenticate. */
729         struct string_list *medium;     /* Current network medium. */
730
731         struct iaddrlist *reject_list;  /* Servers to reject. */
732
733         int omapi_port;                 /* port on which to accept OMAPI
734                                            connections, or -1 for no
735                                            listener. */
736         int do_forward_update;          /* If nonzero, and if we have the
737                                            information we need, update the
738                                            A record for the address we get. */
739 };
740
741 /* Per-interface state used in the dhcp client... */
742 struct client_state {
743         struct client_state *next;
744         struct interface_info *interface;
745         char *name;
746
747         struct client_lease *active;              /* Currently active lease. */
748         struct client_lease *new;                              /* New lease. */
749         struct client_lease *offered_leases;        /* Leases offered to us. */
750         struct client_lease *leases;            /* Leases we currently hold. */
751         struct client_lease *alias;                          /* Alias lease. */
752
753         enum dhcp_state state;          /* Current state for this interface. */
754         struct iaddr destination;                   /* Where to send packet. */
755         u_int32_t xid;                                    /* Transaction ID. */
756         u_int16_t secs;                     /* secs value from DHCPDISCOVER. */
757         TIME first_sending;                     /* When was first copy sent? */
758         TIME interval;                /* What's the current resend interval? */
759         int dns_update_timeout;          /* Last timeout set for DNS update. */
760         struct string_list *medium;                /* Last media type tried. */
761         struct dhcp_packet packet;                  /* Outgoing DHCP packet. */
762         unsigned packet_length;        /* Actual length of generated packet. */
763
764         struct iaddr requested_address;     /* Address we would like to get. */
765
766         struct client_config *config;               /* Client configuration. */
767         struct string_list *env;               /* Client script environment. */
768         int envc;                       /* Number of entries in environment. */
769
770         struct option_state *sent_options;      /* Options we sent. */
771 };
772
773 /* Information about each network interface. */
774
775 struct interface_info {
776         OMAPI_OBJECT_PREAMBLE;
777         struct interface_info *next;    /* Next interface in list... */
778         struct shared_network *shared_network;
779                                 /* Networks connected to this interface. */
780         struct hardware hw_address;     /* Its physical address. */
781         struct in_addr primary_address; /* Primary interface address. */
782
783         u_int8_t *circuit_id;           /* Circuit ID associated with this
784                                            interface. */
785         unsigned circuit_id_len;        /* Length of Circuit ID, if there
786                                            is one. */
787         u_int8_t *remote_id;            /* Remote ID associated with this
788                                            interface (if any). */
789         unsigned remote_id_len;         /* Length of Remote ID. */
790
791         char name [IFNAMSIZ];           /* Its name... */
792         int ieee80211;                  /* True if media is ieee802.11 */
793         int havemedia;                  /* True if we have a media table */
794         int linkstate;                  /* True if we have link */
795         int polling;                    /* True if polling is enabled */
796         int forcediscover;              /* True if a discover is needed */
797         int index;                      /* Its index. */
798         int rfdesc;                     /* Its read file descriptor. */
799         int wfdesc;                     /* Its write file descriptor, if
800                                            different. */
801         unsigned char *rbuf;            /* Read buffer, if required. */
802         unsigned int rbuf_max;          /* Size of read buffer. */
803         size_t rbuf_offset;             /* Current offset into buffer. */
804         size_t rbuf_len;                /* Length of data in buffer. */
805
806         struct ifreq *ifp;              /* Pointer to ifreq struct. */
807         u_int32_t flags;                /* Control flags... */
808 #define INTERFACE_REQUESTED 1
809 #define INTERFACE_AUTOMATIC 2
810 #define INTERFACE_RUNNING 4
811
812         /* Only used by DHCP client code. */
813         struct client_state *client;
814 # if defined (USE_DLPI_SEND) || defined (USE_DLPI_RECEIVE)
815         int dlpi_sap_length;
816         struct hardware dlpi_broadcast_addr;
817 # endif /* DLPI_SEND || DLPI_RECEIVE */
818 };
819
820 struct hardware_link {
821         struct hardware_link *next;
822         char name [IFNAMSIZ];
823         struct hardware address;
824 };
825
826 typedef void (*tvref_t)(void *, void *, const char *, int);
827 typedef void (*tvunref_t)(void *, const char *, int);
828 struct timeout {
829         struct timeout *next;
830         TIME when;
831         void (*func) PROTO ((void *));
832         void *what;
833         tvref_t ref;
834         tvunref_t unref;
835 };
836
837 struct protocol {
838         struct protocol *next;
839         int fd;
840         void (*handler) PROTO ((struct protocol *));
841         void *local;
842 };
843
844 struct dns_query; /* forward */
845
846 struct dns_wakeup {
847         struct dns_wakeup *next;        /* Next wakeup in chain. */
848         void (*func) PROTO ((struct dns_query *));
849 };
850
851 struct dns_question {
852         u_int16_t type;                 /* Type of query. */
853         u_int16_t class;                /* Class of query. */
854         unsigned char data [1];         /* Query data. */
855 };
856
857 struct dns_answer {
858         u_int16_t type;                 /* Type of answer. */
859         u_int16_t class;                /* Class of answer. */
860         int count;                      /* Number of answers. */
861         unsigned char *answers[1];      /* Pointers to answers. */
862 };
863
864 struct dns_query {
865         struct dns_query *next;         /* Next query in hash bucket. */
866         u_int32_t hash;                 /* Hash bucket index. */
867         TIME expiry;                    /* Query expiry time (zero if not yet
868                                            answered. */
869         u_int16_t id;                   /* Query ID (also hash table index) */
870         caddr_t waiters;                /* Pointer to list of things waiting
871                                            on this query. */
872
873         struct dns_question *question;  /* Question, internal format. */
874         struct dns_answer *answer;      /* Answer, internal format. */
875
876         unsigned char *query;           /* Query formatted for DNS server. */
877         unsigned len;                   /* Length of entire query. */
878         int sent;                       /* The query has been sent. */
879         struct dns_wakeup *wakeups;     /* Wakeups to call if this query is
880                                            answered. */
881         struct name_server *next_server;        /* Next server to try. */
882         int backoff;                    /* Current backoff, in seconds. */
883 };
884
885 struct dns_zone {
886         int refcnt;
887         TIME timeout;
888         char *name;
889         struct option_cache *primary;
890         struct option_cache *secondary;
891         struct auth_key *key;
892 };
893
894 struct icmp_state {
895         OMAPI_OBJECT_PREAMBLE;
896         int socket;
897         void (*icmp_handler) PROTO ((struct iaddr, u_int8_t *, int));
898 };
899
900 #include "ctrace.h"
901
902 /* Bitmask of dhcp option codes. */
903 typedef unsigned char option_mask [16];
904
905 /* DHCP Option mask manipulation macros... */
906 #define OPTION_ZERO(mask)       (memset (mask, 0, 16))
907 #define OPTION_SET(mask, bit)   (mask [bit >> 8] |= (1 << (bit & 7)))
908 #define OPTION_CLR(mask, bit)   (mask [bit >> 8] &= ~(1 << (bit & 7)))
909 #define OPTION_ISSET(mask, bit) (mask [bit >> 8] & (1 << (bit & 7)))
910 #define OPTION_ISCLR(mask, bit) (!OPTION_ISSET (mask, bit))
911
912 /* An option occupies its length plus two header bytes (code and
913     length) for every 255 bytes that must be stored. */
914 #define OPTION_SPACE(x)         ((x) + 2 * ((x) / 255 + 1))
915
916 /* Default path to dhcpd config file. */
917 #ifdef DEBUG
918 #undef _PATH_DHCPD_CONF
919 #define _PATH_DHCPD_CONF        "dhcpd.conf"
920 #undef _PATH_DHCPD_DB
921 #define _PATH_DHCPD_DB          "dhcpd.leases"
922 #undef _PATH_DHCPD_PID
923 #define _PATH_DHCPD_PID         "dhcpd.pid"
924 #else
925 #ifndef _PATH_DHCPD_CONF
926 #define _PATH_DHCPD_CONF        "/etc/dhcpd.conf"
927 #endif
928
929 #ifndef _PATH_DHCPD_DB
930 #define _PATH_DHCPD_DB          "/etc/dhcpd.leases"
931 #endif
932
933 #ifndef _PATH_DHCPD_PID
934 #define _PATH_DHCPD_PID         "/var/run/dhcpd.pid"
935 #endif
936 #endif
937
938 #ifndef _PATH_DHCLIENT_CONF
939 #define _PATH_DHCLIENT_CONF     "/etc/dhclient.conf"
940 #endif
941
942 #ifndef _PATH_DHCLIENT_SCRIPT
943 #define _PATH_DHCLIENT_SCRIPT   "/sbin/dhclient-script"
944 #endif
945
946 #ifndef _PATH_DHCLIENT_PID
947 #define _PATH_DHCLIENT_PID      "/var/run/dhclient.pid"
948 #endif
949
950 #ifndef _PATH_DHCLIENT_DB
951 #define _PATH_DHCLIENT_DB       "/etc/dhclient.leases"
952 #endif
953
954 #ifndef _PATH_RESOLV_CONF
955 #define _PATH_RESOLV_CONF       "/etc/resolv.conf"
956 #endif
957
958 #ifndef _PATH_DHCRELAY_PID
959 #define _PATH_DHCRELAY_PID      "/var/run/dhcrelay.pid"
960 #endif
961
962 #ifndef DHCPD_LOG_FACILITY
963 #define DHCPD_LOG_FACILITY      LOG_DAEMON
964 #endif
965
966 #define MAX_TIME 0x7fffffff
967 #define MIN_TIME 0
968
969 /* External definitions... */
970
971 HASH_FUNCTIONS_DECL (group, const char *, struct group_object, group_hash_t)
972 HASH_FUNCTIONS_DECL (universe, const char *, struct universe, universe_hash_t)
973 HASH_FUNCTIONS_DECL (option, const char *, struct option, option_hash_t)
974 HASH_FUNCTIONS_DECL (dns_zone, const char *, struct dns_zone, dns_zone_hash_t)
975 HASH_FUNCTIONS_DECL (lease, const unsigned char *, struct lease, lease_hash_t)
976 HASH_FUNCTIONS_DECL (host, const unsigned char *, struct host_decl, host_hash_t)
977 HASH_FUNCTIONS_DECL (class, const char *, struct class, class_hash_t)
978
979 /* options.c */
980
981 extern struct option *vendor_cfg_option;
982 int parse_options PROTO ((struct packet *));
983 int parse_option_buffer PROTO ((struct option_state *, const unsigned char *,
984                                 unsigned, struct universe *));
985 struct universe *find_option_universe (struct option *, const char *);
986 int parse_encapsulated_suboptions (struct option_state *, struct option *,
987                                    const unsigned char *, unsigned,
988                                    struct universe *, const char *);
989 int cons_options PROTO ((struct packet *, struct dhcp_packet *, struct lease *,
990                          struct client_state *,
991                          int, struct option_state *, struct option_state *,
992                          struct binding_scope **,
993                          int, int, int, struct data_string *, const char *));
994 int fqdn_universe_decode (struct option_state *,
995                           const unsigned char *, unsigned, struct universe *);
996 int store_options PROTO ((unsigned char *, unsigned, struct packet *,
997                           struct lease *, struct client_state *,
998                           struct option_state *,
999                           struct option_state *, struct binding_scope **,
1000                           unsigned *, int, unsigned, unsigned,
1001                           int, const char *));
1002 const char *pretty_print_option PROTO ((struct option *, const unsigned char *,
1003                                         unsigned, int, int));
1004 int get_option (struct data_string *, struct universe *,
1005                 struct packet *, struct lease *, struct client_state *,
1006                 struct option_state *, struct option_state *,
1007                 struct option_state *, struct binding_scope **, unsigned,
1008                 const char *, int);
1009 void set_option (struct universe *, struct option_state *,
1010                  struct option_cache *, enum statement_op);
1011 struct option_cache *lookup_option PROTO ((struct universe *,
1012                                            struct option_state *, unsigned));
1013 struct option_cache *lookup_hashed_option PROTO ((struct universe *,
1014                                                   struct option_state *,
1015                                                   unsigned));
1016 int save_option_buffer (struct universe *, struct option_state *,
1017                         struct buffer *, unsigned char *, unsigned,
1018                         struct option *, int);
1019 void save_option PROTO ((struct universe *,
1020                          struct option_state *, struct option_cache *));
1021 void save_hashed_option PROTO ((struct universe *,
1022                                 struct option_state *, struct option_cache *));
1023 void delete_option PROTO ((struct universe *, struct option_state *, int));
1024 void delete_hashed_option PROTO ((struct universe *,
1025                                   struct option_state *, int));
1026 int option_cache_dereference PROTO ((struct option_cache **,
1027                                      const char *, int));
1028 int hashed_option_state_dereference PROTO ((struct universe *,
1029                                             struct option_state *,
1030                                             const char *, int));
1031 int store_option PROTO ((struct data_string *,
1032                          struct universe *, struct packet *, struct lease *,
1033                          struct client_state *,
1034                          struct option_state *, struct option_state *,
1035                          struct binding_scope **, struct option_cache *));
1036 int option_space_encapsulate PROTO ((struct data_string *,
1037                                      struct packet *, struct lease *,
1038                                      struct client_state *,
1039                                      struct option_state *,
1040                                      struct option_state *,
1041                                      struct binding_scope **,
1042                                      struct data_string *));
1043 int hashed_option_space_encapsulate PROTO ((struct data_string *,
1044                                             struct packet *, struct lease *,
1045                                             struct client_state *,
1046                                             struct option_state *,
1047                                             struct option_state *,
1048                                             struct binding_scope **,
1049                                             struct universe *));
1050 int nwip_option_space_encapsulate PROTO ((struct data_string *,
1051                                           struct packet *, struct lease *,
1052                                           struct client_state *,
1053                                           struct option_state *,
1054                                           struct option_state *,
1055                                           struct binding_scope **,
1056                                           struct universe *));
1057 int fqdn_option_space_encapsulate (struct data_string *,
1058                                    struct packet *, struct lease *,
1059                                    struct client_state *,
1060                                    struct option_state *,
1061                                    struct option_state *,
1062                                    struct binding_scope **,
1063                                    struct universe *);
1064 void suboption_foreach (struct packet *, struct lease *, struct client_state *,
1065                         struct option_state *, struct option_state *,
1066                         struct binding_scope **, struct universe *, void *,
1067                         void (*) (struct option_cache *, struct packet *,
1068                                   struct lease *, struct client_state *,
1069                                   struct option_state *, struct option_state *,
1070                                   struct binding_scope **,
1071                                   struct universe *, void *),
1072                         struct option_cache *, const char *);
1073 void option_space_foreach (struct packet *, struct lease *,
1074                            struct client_state *,
1075                            struct option_state *,
1076                            struct option_state *,
1077                            struct binding_scope **,
1078                            struct universe *, void *,
1079                            void (*) (struct option_cache *,
1080                                      struct packet *,
1081                                      struct lease *, struct client_state *,
1082                                      struct option_state *,
1083                                      struct option_state *,
1084                                      struct binding_scope **,
1085                                      struct universe *, void *));
1086 void hashed_option_space_foreach (struct packet *, struct lease *,
1087                                   struct client_state *,
1088                                   struct option_state *,
1089                                   struct option_state *,
1090                                   struct binding_scope **,
1091                                   struct universe *, void *,
1092                                   void (*) (struct option_cache *,
1093                                             struct packet *,
1094                                             struct lease *,
1095                                             struct client_state *,
1096                                             struct option_state *,
1097                                             struct option_state *,
1098                                             struct binding_scope **,
1099                                             struct universe *, void *));
1100 int linked_option_get PROTO ((struct data_string *, struct universe *,
1101                               struct packet *, struct lease *,
1102                               struct client_state *,
1103                               struct option_state *, struct option_state *,
1104                               struct option_state *, struct binding_scope **,
1105                               unsigned));
1106 int linked_option_state_dereference PROTO ((struct universe *,
1107                                             struct option_state *,
1108                                             const char *, int));
1109 void save_linked_option (struct universe *, struct option_state *,
1110                          struct option_cache *);
1111 void linked_option_space_foreach (struct packet *, struct lease *,
1112                                   struct client_state *,
1113                                   struct option_state *,
1114                                   struct option_state *,
1115                                   struct binding_scope **,
1116                                   struct universe *, void *,
1117                                   void (*) (struct option_cache *,
1118                                             struct packet *,
1119                                             struct lease *,
1120                                             struct client_state *,
1121                                             struct option_state *,
1122                                             struct option_state *,
1123                                             struct binding_scope **,
1124                                             struct universe *, void *));
1125 int linked_option_space_encapsulate (struct data_string *, struct packet *,
1126                                      struct lease *, struct client_state *,
1127                                      struct option_state *,
1128                                      struct option_state *,
1129                                      struct binding_scope **,
1130                                      struct universe *);
1131 void delete_linked_option (struct universe *, struct option_state *, int);
1132 struct option_cache *lookup_linked_option (struct universe *,
1133                                            struct option_state *, unsigned);
1134 void do_packet PROTO ((struct interface_info *,
1135                        struct dhcp_packet *, unsigned,
1136                        unsigned int, struct iaddr, struct hardware *));
1137
1138 /* dhcpd.c */
1139 extern TIME cur_time;
1140
1141 int ddns_update_style;
1142
1143 extern const char *path_dhcpd_conf;
1144 extern const char *path_dhcpd_db;
1145 extern const char *path_dhcpd_pid;
1146
1147 extern int dhcp_max_agent_option_packet_length;
1148
1149 int main PROTO ((int, char **, char **));
1150 void postconf_initialization (int);
1151 void postdb_startup (void);
1152 void cleanup PROTO ((void));
1153 void lease_pinged PROTO ((struct iaddr, u_int8_t *, int));
1154 void lease_ping_timeout PROTO ((void *));
1155 int dhcpd_interface_setup_hook (struct interface_info *ip, struct iaddr *ia);
1156 enum dhcp_shutdown_state shutdown_state;
1157 isc_result_t dhcp_io_shutdown (omapi_object_t *, void *);
1158 isc_result_t dhcp_set_control_state (control_object_state_t oldstate,
1159                                      control_object_state_t newstate);
1160
1161 /* conflex.c */
1162 isc_result_t new_parse PROTO ((struct parse **, int,
1163                                char *, unsigned, const char *, int));
1164 isc_result_t end_parse PROTO ((struct parse **));
1165 enum dhcp_token next_token PROTO ((const char **, unsigned *, struct parse *));
1166 enum dhcp_token peek_token PROTO ((const char **, unsigned *, struct parse *));
1167
1168 /* confpars.c */
1169 void parse_trace_setup (void);
1170 isc_result_t readconf PROTO ((void));
1171 isc_result_t read_conf_file (const char *, struct group *, int, int);
1172 #if defined (TRACING)
1173 void trace_conf_input (trace_type_t *, unsigned, char *);
1174 void trace_conf_stop (trace_type_t *ttype);
1175 #endif
1176 isc_result_t conf_file_subparse (struct parse *, struct group *, int);
1177 isc_result_t lease_file_subparse (struct parse *);
1178 int parse_statement PROTO ((struct parse *,
1179                             struct group *, int, struct host_decl *, int));
1180 #if defined (FAILOVER_PROTOCOL)
1181 void parse_failover_peer PROTO ((struct parse *, struct group *, int));
1182 void parse_failover_state_declaration (struct parse *,
1183                                        dhcp_failover_state_t *);
1184 void parse_failover_state PROTO ((struct parse *,
1185                                   enum failover_state *, TIME *));
1186 #endif
1187 int permit_list_match (struct permit *, struct permit *);
1188 void parse_pool_statement PROTO ((struct parse *, struct group *, int));
1189 int parse_boolean PROTO ((struct parse *));
1190 int parse_lbrace PROTO ((struct parse *));
1191 void parse_host_declaration PROTO ((struct parse *, struct group *));
1192 int parse_class_declaration PROTO ((struct class **, struct parse *,
1193                                     struct group *, int));
1194 void parse_shared_net_declaration PROTO ((struct parse *, struct group *));
1195 void parse_subnet_declaration PROTO ((struct parse *,
1196                                       struct shared_network *));
1197 void parse_group_declaration PROTO ((struct parse *, struct group *));
1198 int parse_fixed_addr_param PROTO ((struct option_cache **, struct parse *));
1199 TIME parse_timestamp PROTO ((struct parse *));
1200 int parse_lease_declaration PROTO ((struct lease **, struct parse *));
1201 void parse_address_range PROTO ((struct parse *, struct group *, int,
1202                                  struct pool *, struct lease **));
1203
1204 /* ddns.c */
1205 int ddns_updates PROTO ((struct packet *, struct lease *, struct lease *,
1206                          struct lease_state *));
1207 int ddns_removals PROTO ((struct lease *));
1208
1209 /* parse.c */
1210 void add_enumeration (struct enumeration *);
1211 struct enumeration *find_enumeration (const char *, int);
1212 struct enumeration_value *find_enumeration_value (const char *, int,
1213                                                   const char *);
1214 void skip_to_semi PROTO ((struct parse *));
1215 void skip_to_rbrace PROTO ((struct parse *, int));
1216 int parse_semi PROTO ((struct parse *));
1217 int parse_string PROTO ((struct parse *, char **, unsigned *));
1218 char *parse_host_name PROTO ((struct parse *));
1219 int parse_ip_addr_or_hostname PROTO ((struct expression **,
1220                                       struct parse *, int));
1221 void parse_hardware_param PROTO ((struct parse *, struct hardware *));
1222 void parse_lease_time PROTO ((struct parse *, TIME *));
1223 unsigned char *parse_numeric_aggregate PROTO ((struct parse *,
1224                                                unsigned char *, unsigned *,
1225                                                int, int, unsigned));
1226 void convert_num PROTO ((struct parse *, unsigned char *, const char *,
1227                          int, unsigned));
1228 TIME parse_date PROTO ((struct parse *));
1229 struct option *parse_option_name PROTO ((struct parse *, int, int *));
1230 void parse_option_space_decl PROTO ((struct parse *));
1231 int parse_option_code_definition PROTO ((struct parse *, struct option *));
1232 int parse_base64 (struct data_string *, struct parse *);
1233 int parse_cshl PROTO ((struct data_string *, struct parse *));
1234 int parse_executable_statement PROTO ((struct executable_statement **,
1235                                        struct parse *, int *,
1236                                        enum expression_context));
1237 int parse_executable_statements PROTO ((struct executable_statement **,
1238                                         struct parse *, int *,
1239                                         enum expression_context));
1240 int parse_zone (struct dns_zone *, struct parse *);
1241 int parse_key (struct parse *);
1242 int parse_on_statement PROTO ((struct executable_statement **,
1243                                struct parse *, int *));
1244 int parse_switch_statement PROTO ((struct executable_statement **,
1245                                    struct parse *, int *));
1246 int parse_case_statement PROTO ((struct executable_statement **,
1247                                  struct parse *, int *,
1248                                  enum expression_context));
1249 int parse_if_statement PROTO ((struct executable_statement **,
1250                                struct parse *, int *));
1251 int parse_boolean_expression PROTO ((struct expression **,
1252                                      struct parse *, int *));
1253 int parse_data_expression PROTO ((struct expression **,
1254                                   struct parse *, int *));
1255 int parse_numeric_expression PROTO ((struct expression **,
1256                                      struct parse *, int *));
1257 int parse_dns_expression PROTO ((struct expression **, struct parse *, int *));
1258 int parse_non_binary PROTO ((struct expression **, struct parse *, int *,
1259                              enum expression_context));
1260 int parse_expression PROTO ((struct expression **, struct parse *, int *,
1261                              enum expression_context,
1262                              struct expression **, enum expr_op));
1263 int parse_option_statement PROTO ((struct executable_statement **,
1264                                    struct parse *, int,
1265                                    struct option *, enum statement_op));
1266 int parse_option_token PROTO ((struct expression **, struct parse *,
1267                                const char **, struct expression *, int, int));
1268 int parse_allow_deny PROTO ((struct option_cache **, struct parse *, int));
1269 int parse_auth_key PROTO ((struct data_string *, struct parse *));
1270 int parse_warn (struct parse *, const char *, ...)
1271         __attribute__((__format__(__printf__,2,3)));
1272
1273 /* tree.c */
1274 #if defined (NSUPDATE)
1275 extern struct __res_state resolver_state;
1276 extern int resolver_inited;
1277 #endif
1278
1279 extern struct binding_scope *global_scope;
1280 pair cons PROTO ((caddr_t, pair));
1281 int make_const_option_cache PROTO ((struct option_cache **, struct buffer **,
1282                                     u_int8_t *, unsigned, struct option *,
1283                                     const char *, int));
1284 int make_host_lookup PROTO ((struct expression **, const char *));
1285 int enter_dns_host PROTO ((struct dns_host_entry **, const char *));
1286 int make_const_data (struct expression **,
1287                      const unsigned char *, unsigned, int, int,
1288                      const char *, int);
1289 int make_const_int PROTO ((struct expression **, unsigned long));
1290 int make_concat PROTO ((struct expression **,
1291                         struct expression *, struct expression *));
1292 int make_encapsulation PROTO ((struct expression **, struct data_string *));
1293 int make_substring PROTO ((struct expression **, struct expression *,
1294                            struct expression *, struct expression *));
1295 int make_limit PROTO ((struct expression **, struct expression *, int));
1296 int make_let PROTO ((struct executable_statement **, const char *));
1297 int option_cache PROTO ((struct option_cache **, struct data_string *,
1298                          struct expression *, struct option *,
1299                          const char *, int));
1300 int evaluate_expression (struct binding_value **, struct packet *,
1301                          struct lease *, struct client_state *,
1302                          struct option_state *, struct option_state *,
1303                          struct binding_scope **, struct expression *,
1304                          const char *, int);
1305 int binding_value_dereference (struct binding_value **, const char *, int);
1306 #if defined (NSUPDATE)
1307 int evaluate_dns_expression PROTO ((ns_updrec **, struct packet *,
1308                                     struct lease *, 
1309                                     struct client_state *,
1310                                     struct option_state *,
1311                                     struct option_state *,
1312                                     struct binding_scope **,
1313                                     struct expression *));
1314 #endif
1315 int evaluate_boolean_expression PROTO ((int *,
1316                                         struct packet *,  struct lease *,
1317                                         struct client_state *,
1318                                         struct option_state *,
1319                                         struct option_state *,
1320                                         struct binding_scope **,
1321                                         struct expression *));
1322 int evaluate_data_expression PROTO ((struct data_string *,
1323                                      struct packet *, struct lease *,
1324                                      struct client_state *,
1325                                      struct option_state *,
1326                                      struct option_state *,
1327                                      struct binding_scope **,
1328                                      struct expression *, const char *, int));
1329 int evaluate_numeric_expression (unsigned long *, struct packet *,
1330                                  struct lease *, struct client_state *,
1331                                  struct option_state *, struct option_state *,
1332                                  struct binding_scope **,
1333                                  struct expression *);
1334 int evaluate_option_cache PROTO ((struct data_string *,
1335                                   struct packet *, struct lease *,
1336                                   struct client_state *,
1337                                   struct option_state *, struct option_state *,
1338                                   struct binding_scope **,
1339                                   struct option_cache *,
1340                                   const char *, int));
1341 int evaluate_boolean_option_cache PROTO ((int *,
1342                                           struct packet *, struct lease *,
1343                                           struct client_state *,
1344                                           struct option_state *,
1345                                           struct option_state *,
1346                                           struct binding_scope **,
1347                                           struct option_cache *,
1348                                           const char *, int));
1349 int evaluate_boolean_expression_result PROTO ((int *,
1350                                                struct packet *, struct lease *,
1351                                                struct client_state *,
1352                                                struct option_state *,
1353                                                struct option_state *,
1354                                                struct binding_scope **,
1355                                                struct expression *));
1356 void expression_dereference PROTO ((struct expression **, const char *, int));
1357 int is_dns_expression PROTO ((struct expression *));
1358 int is_boolean_expression PROTO ((struct expression *));
1359 int is_data_expression PROTO ((struct expression *));
1360 int is_numeric_expression PROTO ((struct expression *));
1361 int is_compound_expression PROTO ((struct expression *));
1362 int op_precedence PROTO ((enum expr_op, enum expr_op));
1363 enum expression_context expression_context (struct expression *);
1364 enum expression_context op_context PROTO ((enum expr_op));
1365 int write_expression PROTO ((FILE *, struct expression *, int, int, int));
1366 struct binding *find_binding PROTO ((struct binding_scope *, const char *));
1367 int free_bindings PROTO ((struct binding_scope *, const char *, int));
1368 int binding_scope_dereference PROTO ((struct binding_scope **,
1369                                       const char *, int));
1370 int fundef_dereference (struct fundef **, const char *, int);
1371 int data_subexpression_length (int *, struct expression *);
1372 int expr_valid_for_context (struct expression *, enum expression_context);
1373 struct binding *create_binding (struct binding_scope **, const char *);
1374 int bind_ds_value (struct binding_scope **,
1375                    const char *, struct data_string *);
1376 int find_bound_string (struct data_string *,
1377                        struct binding_scope *, const char *);
1378 int unset (struct binding_scope *, const char *);
1379
1380 /* dhcp.c */
1381 extern int outstanding_pings;
1382
1383 void dhcp PROTO ((struct packet *));
1384 void dhcpdiscover PROTO ((struct packet *, int));
1385 void dhcprequest PROTO ((struct packet *, int, struct lease *));
1386 void dhcprelease PROTO ((struct packet *, int));
1387 void dhcpdecline PROTO ((struct packet *, int));
1388 void dhcpinform PROTO ((struct packet *, int));
1389 void nak_lease PROTO ((struct packet *, struct iaddr *cip));
1390 void ack_lease PROTO ((struct packet *, struct lease *,
1391                        unsigned int, TIME, char *, int));
1392 void dhcp_reply PROTO ((struct lease *));
1393 int find_lease PROTO ((struct lease **, struct packet *,
1394                        struct shared_network *, int *, int *, struct lease *,
1395                        const char *, int));
1396 int mockup_lease PROTO ((struct lease **, struct packet *,
1397                          struct shared_network *,
1398                          struct host_decl *));
1399 void static_lease_dereference PROTO ((struct lease *, const char *, int));
1400
1401 int allocate_lease PROTO ((struct lease **, struct packet *,
1402                            struct pool *, int *));
1403 int permitted PROTO ((struct packet *, struct permit *));
1404 int locate_network PROTO ((struct packet *));
1405 int parse_agent_information_option PROTO ((struct packet *, int, u_int8_t *));
1406 unsigned cons_agent_information_options PROTO ((struct option_state *,
1407                                                 struct dhcp_packet *,
1408                                                 unsigned, unsigned));
1409
1410 /* bootp.c */
1411 void bootp PROTO ((struct packet *));
1412
1413 /* memory.c */
1414 int (*group_write_hook) (struct group_object *);
1415 extern struct group *root_group;
1416 extern group_hash_t *group_name_hash;
1417 isc_result_t delete_group (struct group_object *, int);
1418 isc_result_t supersede_group (struct group_object *, int);
1419 int clone_group (struct group **, struct group *, const char *, int);
1420 int write_group PROTO ((struct group_object *));
1421
1422 /* salloc.c */
1423 void relinquish_lease_hunks (void);
1424 struct lease *new_leases PROTO ((unsigned, const char *, int));
1425 #if defined (DEBUG_MEMORY_LEAKAGE) || \
1426                 defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
1427 void relinquish_free_lease_states (void);
1428 #endif
1429 OMAPI_OBJECT_ALLOC_DECL (lease, struct lease, dhcp_type_lease)
1430 OMAPI_OBJECT_ALLOC_DECL (class, struct class, dhcp_type_class)
1431 OMAPI_OBJECT_ALLOC_DECL (pool, struct pool, dhcp_type_pool)
1432 OMAPI_OBJECT_ALLOC_DECL (host, struct host_decl, dhcp_type_host)
1433
1434 /* alloc.c */
1435 OMAPI_OBJECT_ALLOC_DECL (subnet, struct subnet, dhcp_type_subnet)
1436 OMAPI_OBJECT_ALLOC_DECL (shared_network, struct shared_network,
1437                          dhcp_type_shared_network)
1438 OMAPI_OBJECT_ALLOC_DECL (group_object, struct group_object, dhcp_type_group)
1439 OMAPI_OBJECT_ALLOC_DECL (dhcp_control,
1440                          dhcp_control_object_t, dhcp_type_control)
1441
1442 #if defined (DEBUG_MEMORY_LEAKAGE) || \
1443                 defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
1444 void relinquish_free_pairs (void);
1445 void relinquish_free_expressions (void);
1446 void relinquish_free_binding_values (void);
1447 void relinquish_free_option_caches (void);
1448 void relinquish_free_packets (void);
1449 #endif
1450
1451 int option_chain_head_allocate (struct option_chain_head **,
1452                                 const char *, int);
1453 int option_chain_head_reference (struct option_chain_head **,
1454                                  struct option_chain_head *,
1455                                  const char *, int);
1456 int option_chain_head_dereference (struct option_chain_head **,
1457                                    const char *, int);
1458 int group_allocate (struct group **, const char *, int);
1459 int group_reference (struct group **, struct group *, const char *, int);
1460 int group_dereference (struct group **, const char *, int);
1461 struct dhcp_packet *new_dhcp_packet PROTO ((const char *, int));
1462 struct protocol *new_protocol PROTO ((const char *, int));
1463 struct lease_state *new_lease_state PROTO ((const char *, int));
1464 struct domain_search_list *new_domain_search_list PROTO ((const char *, int));
1465 struct name_server *new_name_server PROTO ((const char *, int));
1466 void free_name_server PROTO ((struct name_server *, const char *, int));
1467 struct option *new_option PROTO ((const char *, int));
1468 int group_allocate (struct group **, const char *, int);
1469 int group_reference (struct group **, struct group *, const char *, int);
1470 int group_dereference (struct group **, const char *, int);
1471 void free_option PROTO ((struct option *, const char *, int));
1472 struct universe *new_universe PROTO ((const char *, int));
1473 void free_universe PROTO ((struct universe *, const char *, int));
1474 void free_domain_search_list PROTO ((struct domain_search_list *,
1475                                      const char *, int));
1476 void free_lease_state PROTO ((struct lease_state *, const char *, int));
1477 void free_protocol PROTO ((struct protocol *, const char *, int));
1478 void free_dhcp_packet PROTO ((struct dhcp_packet *, const char *, int));
1479 struct client_lease *new_client_lease PROTO ((const char *, int));
1480 void free_client_lease PROTO ((struct client_lease *, const char *, int));
1481 struct permit *new_permit PROTO ((const char *, int));
1482 void free_permit PROTO ((struct permit *, const char *, int));
1483 pair new_pair PROTO ((const char *, int));
1484 void free_pair PROTO ((pair, const char *, int));
1485 int expression_allocate PROTO ((struct expression **, const char *, int));
1486 int expression_reference PROTO ((struct expression **,
1487                                  struct expression *, const char *, int));
1488 void free_expression PROTO ((struct expression *, const char *, int));
1489 int binding_value_allocate PROTO ((struct binding_value **,
1490                                    const char *, int));
1491 int binding_value_reference PROTO ((struct binding_value **,
1492                                     struct binding_value *,
1493                                     const char *, int));
1494 void free_binding_value PROTO ((struct binding_value *, const char *, int));
1495 int fundef_allocate PROTO ((struct fundef **, const char *, int));
1496 int fundef_reference PROTO ((struct fundef **,
1497                              struct fundef *, const char *, int));
1498 int option_cache_allocate PROTO ((struct option_cache **, const char *, int));
1499 int option_cache_reference PROTO ((struct option_cache **,
1500                                    struct option_cache *, const char *, int));
1501 int buffer_allocate PROTO ((struct buffer **, unsigned, const char *, int));
1502 int buffer_reference PROTO ((struct buffer **, struct buffer *,
1503                              const char *, int));
1504 int buffer_dereference PROTO ((struct buffer **, const char *, int));
1505 int dns_host_entry_allocate PROTO ((struct dns_host_entry **,
1506                                     const char *, const char *, int));
1507 int dns_host_entry_reference PROTO ((struct dns_host_entry **,
1508                                      struct dns_host_entry *,
1509                                      const char *, int));
1510 int dns_host_entry_dereference PROTO ((struct dns_host_entry **,
1511                                        const char *, int));
1512 int option_state_allocate PROTO ((struct option_state **, const char *, int));
1513 int option_state_reference PROTO ((struct option_state **,
1514                                    struct option_state *, const char *, int));
1515 int option_state_dereference PROTO ((struct option_state **,
1516                                      const char *, int));
1517 void data_string_copy PROTO ((struct data_string *,
1518                               struct data_string *, const char *, int));
1519 void data_string_forget PROTO ((struct data_string *, const char *, int));
1520 void data_string_truncate PROTO ((struct data_string *, int));
1521 int executable_statement_allocate PROTO ((struct executable_statement **,
1522                                           const char *, int));
1523 int executable_statement_reference PROTO ((struct executable_statement **,
1524                                            struct executable_statement *,
1525                                            const char *, int));
1526 int packet_allocate PROTO ((struct packet **, const char *, int));
1527 int packet_reference PROTO ((struct packet **,
1528                              struct packet *, const char *, int));
1529 int packet_dereference PROTO ((struct packet **, const char *, int));
1530 int binding_scope_allocate PROTO ((struct binding_scope **,
1531                                    const char *, int));
1532 int binding_scope_reference PROTO ((struct binding_scope **,
1533                                     struct binding_scope *,
1534                                     const char *, int));
1535 int dns_zone_allocate PROTO ((struct dns_zone **, const char *, int));
1536 int dns_zone_reference PROTO ((struct dns_zone **,
1537                                struct dns_zone *, const char *, int));
1538
1539 /* print.c */
1540 char *quotify_string (const char *, const char *, int);
1541 char *quotify_buf (const unsigned char *, unsigned, const char *, int);
1542 char *print_base64 (const unsigned char *, unsigned, const char *, int);
1543 char *print_hw_addr PROTO ((int, int, unsigned char *));
1544 void print_lease PROTO ((struct lease *));
1545 void dump_raw PROTO ((const unsigned char *, unsigned));
1546 void dump_packet_option (struct option_cache *, struct packet *,
1547                          struct lease *, struct client_state *,
1548                          struct option_state *, struct option_state *,
1549                          struct binding_scope **, struct universe *, void *);
1550 void dump_packet PROTO ((struct packet *));
1551 void hash_dump PROTO ((struct hash_table *));
1552 char *print_hex_1 PROTO ((unsigned, const u_int8_t *, unsigned));
1553 char *print_hex_2 PROTO ((unsigned, const u_int8_t *, unsigned));
1554 char *print_hex_3 PROTO ((unsigned, const u_int8_t *, unsigned));
1555 char *print_dotted_quads PROTO ((unsigned, const u_int8_t *));
1556 char *print_dec_1 PROTO ((unsigned long));
1557 char *print_dec_2 PROTO ((unsigned long));
1558 void print_expression PROTO ((const char *, struct expression *));
1559 int token_print_indent_concat (FILE *, int, int,
1560                                const char *, const char *, ...);
1561 int token_indent_data_string (FILE *, int, int, const char *, const char *,
1562                               struct data_string *);
1563 int token_print_indent (FILE *, int, int,
1564                         const char *, const char *, const char *);
1565 void indent_spaces (FILE *, int);
1566 #if defined (NSUPDATE)
1567 void print_dns_status (int, ns_updque *);
1568 #endif
1569
1570 /* socket.c */
1571 #if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_RECEIVE) \
1572         || defined (USE_SOCKET_FALLBACK)
1573 int if_register_socket PROTO ((struct interface_info *));
1574 #endif
1575
1576 #if defined (USE_SOCKET_FALLBACK) && !defined (USE_SOCKET_SEND)
1577 void if_reinitialize_fallback PROTO ((struct interface_info *));
1578 void if_register_fallback PROTO ((struct interface_info *));
1579 ssize_t send_fallback PROTO ((struct interface_info *,
1580                               struct packet *, struct dhcp_packet *, size_t, 
1581                               struct in_addr,
1582                               struct sockaddr_in *, struct hardware *));
1583 #endif
1584
1585 #ifdef USE_SOCKET_SEND
1586 void if_reinitialize_send PROTO ((struct interface_info *));
1587 void if_register_send PROTO ((struct interface_info *));
1588 void if_deregister_send PROTO ((struct interface_info *));
1589 ssize_t send_packet PROTO ((struct interface_info *,
1590                             struct packet *, struct dhcp_packet *, size_t, 
1591                             struct in_addr,
1592                             struct sockaddr_in *, struct hardware *));
1593 #endif
1594 #ifdef USE_SOCKET_RECEIVE
1595 void if_reinitialize_receive PROTO ((struct interface_info *));
1596 void if_register_receive PROTO ((struct interface_info *));
1597 void if_deregister_receive PROTO ((struct interface_info *));
1598 ssize_t receive_packet PROTO ((struct interface_info *,
1599                                unsigned char *, size_t,
1600                                struct sockaddr_in *, struct hardware *));
1601 #endif
1602
1603 #if defined (USE_SOCKET_FALLBACK)
1604 isc_result_t fallback_discard PROTO ((omapi_object_t *));
1605 #endif
1606
1607 #if defined (USE_SOCKET_SEND)
1608 int can_unicast_without_arp PROTO ((struct interface_info *));
1609 int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
1610 int supports_multiple_interfaces (struct interface_info *);
1611 void maybe_setup_fallback PROTO ((void));
1612 #endif
1613
1614 /* bpf.c */
1615 #if defined (USE_BPF_SEND) || defined (USE_BPF_RECEIVE)
1616 int if_register_bpf PROTO ( (struct interface_info *));
1617 #endif
1618 #ifdef USE_BPF_SEND
1619 void if_reinitialize_send PROTO ((struct interface_info *));
1620 void if_register_send PROTO ((struct interface_info *));
1621 void if_deregister_send PROTO ((struct interface_info *));
1622 ssize_t send_packet PROTO ((struct interface_info *,
1623                             struct packet *, struct dhcp_packet *, size_t,
1624                             struct in_addr,
1625                             struct sockaddr_in *, struct hardware *));
1626 #endif
1627 #ifdef USE_BPF_RECEIVE
1628 void if_reinitialize_receive PROTO ((struct interface_info *));
1629 void if_register_receive PROTO ((struct interface_info *));
1630 void if_deregister_receive PROTO ((struct interface_info *));
1631 ssize_t receive_packet PROTO ((struct interface_info *,
1632                                unsigned char *, size_t,
1633                                struct sockaddr_in *, struct hardware *));
1634 #endif
1635 #if defined (USE_BPF_SEND)
1636 int can_unicast_without_arp PROTO ((struct interface_info *));
1637 int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
1638 int supports_multiple_interfaces (struct interface_info *);
1639 void maybe_setup_fallback PROTO ((void));
1640 #endif
1641
1642 /* lpf.c */
1643 #if defined (USE_LPF_SEND) || defined (USE_LPF_RECEIVE)
1644 int if_register_lpf PROTO ( (struct interface_info *));
1645 #endif
1646 #ifdef USE_LPF_SEND
1647 void if_reinitialize_send PROTO ((struct interface_info *));
1648 void if_register_send PROTO ((struct interface_info *));
1649 void if_deregister_send PROTO ((struct interface_info *));
1650 ssize_t send_packet PROTO ((struct interface_info *,
1651                             struct packet *, struct dhcp_packet *, size_t,
1652                             struct in_addr,
1653                             struct sockaddr_in *, struct hardware *));
1654 #endif
1655 #ifdef USE_LPF_RECEIVE
1656 void if_reinitialize_receive PROTO ((struct interface_info *));
1657 void if_register_receive PROTO ((struct interface_info *));
1658 void if_deregister_receive PROTO ((struct interface_info *));
1659 ssize_t receive_packet PROTO ((struct interface_info *,
1660                                unsigned char *, size_t,
1661                                struct sockaddr_in *, struct hardware *));
1662 #endif
1663 #if defined (USE_LPF_SEND)
1664 int can_unicast_without_arp PROTO ((struct interface_info *));
1665 int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
1666 int supports_multiple_interfaces (struct interface_info *);
1667 void maybe_setup_fallback PROTO ((void));
1668 #endif
1669
1670 /* nit.c */
1671 #if defined (USE_NIT_SEND) || defined (USE_NIT_RECEIVE)
1672 int if_register_nit PROTO ( (struct interface_info *));
1673 #endif
1674
1675 #ifdef USE_NIT_SEND
1676 void if_reinitialize_send PROTO ((struct interface_info *));
1677 void if_register_send PROTO ((struct interface_info *));
1678 void if_deregister_send PROTO ((struct interface_info *));
1679 ssize_t send_packet PROTO ((struct interface_info *,
1680                             struct packet *, struct dhcp_packet *, size_t,
1681                             struct in_addr,
1682                             struct sockaddr_in *, struct hardware *));
1683 #endif
1684 #ifdef USE_NIT_RECEIVE
1685 void if_reinitialize_receive PROTO ((struct interface_info *));
1686 void if_register_receive PROTO ((struct interface_info *));
1687 void if_deregister_receive PROTO ((struct interface_info *));
1688 ssize_t receive_packet PROTO ((struct interface_info *,
1689                                unsigned char *, size_t,
1690                                struct sockaddr_in *, struct hardware *));
1691 #endif
1692 #if defined (USE_NIT_SEND)
1693 int can_unicast_without_arp PROTO ((struct interface_info *));
1694 int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
1695 int supports_multiple_interfaces (struct interface_info *);
1696 void maybe_setup_fallback PROTO ((void));
1697 #endif
1698
1699 /* dlpi.c */
1700 #if defined (USE_DLPI_SEND) || defined (USE_DLPI_RECEIVE)
1701 int if_register_dlpi PROTO ( (struct interface_info *));
1702 #endif
1703
1704 #ifdef USE_DLPI_SEND
1705 void if_reinitialize_send PROTO ((struct interface_info *));
1706 void if_register_send PROTO ((struct interface_info *));
1707 void if_deregister_send PROTO ((struct interface_info *));
1708 ssize_t send_packet PROTO ((struct interface_info *,
1709                             struct packet *, struct dhcp_packet *, size_t,
1710                             struct in_addr,
1711                             struct sockaddr_in *, struct hardware *));
1712 #endif
1713 #ifdef USE_DLPI_RECEIVE
1714 void if_reinitialize_receive PROTO ((struct interface_info *));
1715 void if_register_receive PROTO ((struct interface_info *));
1716 void if_deregister_receive PROTO ((struct interface_info *));
1717 ssize_t receive_packet PROTO ((struct interface_info *,
1718                                unsigned char *, size_t,
1719                                struct sockaddr_in *, struct hardware *));
1720 #endif
1721
1722
1723 /* raw.c */
1724 #ifdef USE_RAW_SEND
1725 void if_reinitialize_send PROTO ((struct interface_info *));
1726 void if_register_send PROTO ((struct interface_info *));
1727 void if_deregister_send PROTO ((struct interface_info *));
1728 ssize_t send_packet PROTO ((struct interface_info *,
1729                             struct packet *, struct dhcp_packet *, size_t,
1730                             struct in_addr,
1731                             struct sockaddr_in *, struct hardware *));
1732 int can_unicast_without_arp PROTO ((struct interface_info *));
1733 int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
1734 int supports_multiple_interfaces (struct interface_info *);
1735 void maybe_setup_fallback PROTO ((void));
1736 #endif
1737
1738 /* discover.c */
1739 extern struct interface_info *interfaces,
1740         *dummy_interfaces, *fallback_interface;
1741 extern struct protocol *protocols;
1742 extern int quiet_interface_discovery;
1743 isc_result_t interface_setup (void);
1744 void interface_trace_setup (void);
1745
1746 extern struct in_addr limited_broadcast;
1747 extern struct in_addr local_address;
1748
1749 extern u_int16_t local_port;
1750 extern u_int16_t remote_port;
1751 extern int (*dhcp_interface_setup_hook) (struct interface_info *,
1752                                          struct iaddr *);
1753 extern int (*dhcp_interface_discovery_hook) (struct interface_info *);
1754 isc_result_t (*dhcp_interface_startup_hook) (struct interface_info *);
1755
1756 extern void (*bootp_packet_handler) PROTO ((struct interface_info *,
1757                                             struct dhcp_packet *, unsigned,
1758                                             unsigned int,
1759                                             struct iaddr, struct hardware *));
1760 extern struct timeout *timeouts;
1761 extern omapi_object_type_t *dhcp_type_interface;
1762 #if defined (TRACING)
1763 trace_type_t *interface_trace;
1764 trace_type_t *inpacket_trace;
1765 trace_type_t *outpacket_trace;
1766 #endif
1767 extern struct interface_info **interface_vector;
1768 extern int interface_count;
1769 extern int interface_max;
1770 isc_result_t interface_initialize (omapi_object_t *, const char *, int);
1771 void discover_interfaces PROTO ((int));
1772 int setup_fallback (struct interface_info **, const char *, int);
1773 int if_readsocket PROTO ((omapi_object_t *));
1774 void reinitialize_interfaces PROTO ((void));
1775
1776 /* dispatch.c */
1777 void set_time (u_int32_t);
1778 struct timeval *process_outstanding_timeouts (struct timeval *);
1779 void dispatch PROTO ((void));
1780 isc_result_t got_one PROTO ((omapi_object_t *));
1781 isc_result_t interface_set_value (omapi_object_t *, omapi_object_t *,
1782                                   omapi_data_string_t *, omapi_typed_data_t *);
1783 isc_result_t interface_get_value (omapi_object_t *, omapi_object_t *,
1784                                   omapi_data_string_t *, omapi_value_t **); 
1785 isc_result_t interface_destroy (omapi_object_t *, const char *, int);
1786 isc_result_t interface_signal_handler (omapi_object_t *,
1787                                        const char *, va_list);
1788 isc_result_t interface_stuff_values (omapi_object_t *,
1789                                      omapi_object_t *,
1790                                      omapi_object_t *);
1791
1792 void add_timeout PROTO ((TIME, void (*) PROTO ((void *)), void *,
1793                          tvref_t, tvunref_t));
1794 void cancel_timeout PROTO ((void (*) PROTO ((void *)), void *));
1795 void cancel_all_timeouts (void);
1796 void relinquish_timeouts (void);
1797 #if 0
1798 struct protocol *add_protocol PROTO ((const char *, int,
1799                                       void (*) PROTO ((struct protocol *)),
1800                                       void *));
1801
1802 void remove_protocol PROTO ((struct protocol *));
1803 #endif
1804 OMAPI_OBJECT_ALLOC_DECL (interface,
1805                          struct interface_info, dhcp_type_interface)
1806
1807 /* tables.c */
1808 extern struct universe dhcp_universe;
1809 extern struct option dhcp_options [256];
1810 extern struct universe nwip_universe;
1811 extern struct option nwip_options [256];
1812 extern struct universe fqdn_universe;
1813 extern struct option fqdn_options [256];
1814 extern int dhcp_option_default_priority_list [];
1815 extern int dhcp_option_default_priority_list_count;
1816 extern const char *hardware_types [256];
1817 int universe_count, universe_max;
1818 struct universe **universes;
1819 extern universe_hash_t *universe_hash;
1820 void initialize_common_option_spaces PROTO ((void));
1821 struct universe *config_universe;
1822
1823 /* stables.c */
1824 #if defined (FAILOVER_PROTOCOL)
1825 extern failover_option_t null_failover_option;
1826 extern failover_option_t skip_failover_option;
1827 extern struct failover_option_info ft_options [];
1828 extern u_int32_t fto_allowed [];
1829 extern int ft_sizes [];
1830 extern const char *dhcp_flink_state_names [];
1831 #endif
1832 extern const char *binding_state_names [];
1833
1834 extern struct universe agent_universe;
1835 extern struct option agent_options [256];
1836 extern struct universe server_universe;
1837 extern struct option server_options [256];
1838
1839 extern struct enumeration ddns_styles;
1840 extern struct enumeration syslog_enum;
1841 void initialize_server_option_spaces PROTO ((void));
1842
1843 /* inet.c */
1844 struct iaddr subnet_number PROTO ((struct iaddr, struct iaddr));
1845 struct iaddr ip_addr PROTO ((struct iaddr, struct iaddr, u_int32_t));
1846 struct iaddr broadcast_addr PROTO ((struct iaddr, struct iaddr));
1847 u_int32_t host_addr PROTO ((struct iaddr, struct iaddr));
1848 int addr_eq PROTO ((struct iaddr, struct iaddr));
1849 char *piaddr PROTO ((struct iaddr));
1850 char *piaddrmask (struct iaddr, struct iaddr, const char *, int);
1851 char *piaddr1 PROTO ((struct iaddr));
1852
1853 /* dhclient.c */
1854 extern const char *path_dhclient_conf;
1855 extern const char *path_dhclient_db;
1856 extern const char *path_dhclient_pid;
1857 extern char *path_dhclient_script;
1858 extern int interfaces_requested;
1859
1860 extern struct client_config top_level_config;
1861
1862 void dhcpoffer PROTO ((struct packet *));
1863 void dhcpack PROTO ((struct packet *));
1864 void dhcpnak PROTO ((struct packet *));
1865
1866 void send_discover PROTO ((void *));
1867 void send_request PROTO ((void *));
1868 void send_release PROTO ((void *));
1869 void send_decline PROTO ((void *));
1870
1871 void state_reboot PROTO ((void *));
1872 #ifdef ENABLE_POLLING_MODE
1873 void state_polling PROTO (());
1874 void state_background PROTO ((void *));
1875 #endif
1876 void state_init PROTO ((void *));
1877 void state_selecting PROTO ((void *));
1878 void state_requesting PROTO ((void *));
1879 void state_bound PROTO ((void *));
1880 void state_stop PROTO ((void *));
1881 void state_panic PROTO ((void *));
1882
1883 #ifdef __FreeBSD__
1884 void set_ieee80211 PROTO ((struct interface_info *));
1885 #endif
1886 int interface_active PROTO ((struct interface_info *));
1887
1888 void bind_lease PROTO ((struct client_state *));
1889
1890 void make_client_options PROTO ((struct client_state *,
1891                                  struct client_lease *, u_int8_t *,
1892                                  struct option_cache *, struct iaddr *,
1893                                  u_int32_t *, struct option_state **));
1894 void make_discover PROTO ((struct client_state *, struct client_lease *));
1895 void make_request PROTO ((struct client_state *, struct client_lease *));
1896 void make_decline PROTO ((struct client_state *, struct client_lease *));
1897 void make_release PROTO ((struct client_state *, struct client_lease *));
1898
1899 void destroy_client_lease PROTO ((struct client_lease *));
1900 void rewrite_client_leases PROTO ((void));
1901 void write_lease_option (struct option_cache *, struct packet *,
1902                          struct lease *, struct client_state *,
1903                          struct option_state *, struct option_state *,
1904                          struct binding_scope **, struct universe *, void *);
1905 int write_client_lease PROTO ((struct client_state *,
1906                                struct client_lease *, int, int));
1907 int dhcp_option_ev_name (char *, size_t, struct option *);
1908
1909 void script_init PROTO ((struct client_state *, const char *,
1910                          struct string_list *));
1911 void client_option_envadd (struct option_cache *, struct packet *,
1912                            struct lease *, struct client_state *,
1913                            struct option_state *, struct option_state *,
1914                            struct binding_scope **, struct universe *, void *);
1915 void script_write_params PROTO ((struct client_state *,
1916                                  const char *, struct client_lease *));
1917 int script_go PROTO ((struct client_state *));
1918 void client_envadd (struct client_state *,
1919                     const char *, const char *, const char *, ...)
1920         __attribute__((__format__(__printf__,4,5)));
1921
1922 struct client_lease *packet_to_lease (struct packet *, struct client_state *);
1923 void go_daemon PROTO ((void));
1924 void write_client_pid_file PROTO ((void));
1925 void client_location_changed PROTO ((void));
1926 void do_release PROTO ((struct client_state *));
1927 int dhclient_interface_shutdown_hook (struct interface_info *);
1928 int dhclient_interface_discovery_hook (struct interface_info *);
1929 isc_result_t dhclient_interface_startup_hook (struct interface_info *);
1930 void client_dns_update_timeout (void *cp);
1931 isc_result_t client_dns_update (struct client_state *client, int, int);
1932
1933 /* db.c */
1934 int write_lease PROTO ((struct lease *));
1935 int write_host PROTO ((struct host_decl *));
1936 #if defined (FAILOVER_PROTOCOL)
1937 int write_failover_state (dhcp_failover_state_t *);
1938 #endif
1939 int db_printable PROTO ((const char *));
1940 int db_printable_len PROTO ((const unsigned char *, unsigned));
1941 void write_named_billing_class (const char *, unsigned, struct class *);
1942 void write_billing_classes (void);
1943 int write_billing_class PROTO ((struct class *));
1944 void commit_leases_timeout PROTO ((void *));
1945 int commit_leases PROTO ((void));
1946 void db_startup PROTO ((int));
1947 int new_lease_file PROTO ((void));
1948 int group_writer (struct group_object *);
1949
1950 /* packet.c */
1951 u_int32_t checksum PROTO ((unsigned char *, unsigned, u_int32_t));
1952 u_int32_t wrapsum PROTO ((u_int32_t));
1953 void assemble_hw_header PROTO ((struct interface_info *, unsigned char *,
1954                                 unsigned *, struct hardware *));
1955 void assemble_udp_ip_header PROTO ((struct interface_info *, unsigned char *,
1956                                     unsigned *, u_int32_t, u_int32_t,
1957                                     u_int32_t, unsigned char *, unsigned));
1958 ssize_t decode_hw_header PROTO ((struct interface_info *, unsigned char *,
1959                                  unsigned, struct hardware *));
1960 ssize_t decode_udp_ip_header PROTO ((struct interface_info *, unsigned char *,
1961                                      unsigned, struct sockaddr_in *,
1962                                      unsigned char *, unsigned));
1963
1964 /* ethernet.c */
1965 void assemble_ethernet_header PROTO ((struct interface_info *, unsigned char *,
1966                                       unsigned *, struct hardware *));
1967 ssize_t decode_ethernet_header PROTO ((struct interface_info *,
1968                                        unsigned char *,
1969                                        unsigned, struct hardware *));
1970
1971 /* tr.c */
1972 void assemble_tr_header PROTO ((struct interface_info *, unsigned char *,
1973                                 unsigned *, struct hardware *));
1974 ssize_t decode_tr_header PROTO ((struct interface_info *,
1975                                  unsigned char *,
1976                                  unsigned, struct hardware *));
1977
1978 /* dhxpxlt.c */
1979 void convert_statement PROTO ((struct parse *));
1980 void convert_host_statement PROTO ((struct parse *, jrefproto));
1981 void convert_host_name PROTO ((struct parse *, jrefproto));
1982 void convert_class_statement PROTO ((struct parse *, jrefproto, int));
1983 void convert_class_decl PROTO ((struct parse *, jrefproto));
1984 void convert_lease_time PROTO ((struct parse *, jrefproto, char *));
1985 void convert_shared_net_statement PROTO ((struct parse *, jrefproto));
1986 void convert_subnet_statement PROTO ((struct parse *, jrefproto));
1987 void convert_subnet_decl PROTO ((struct parse *, jrefproto));
1988 void convert_host_decl PROTO ((struct parse *, jrefproto));
1989 void convert_hardware_decl PROTO ((struct parse *, jrefproto));
1990 void convert_hardware_addr PROTO ((struct parse *, jrefproto));
1991 void convert_filename_decl PROTO ((struct parse *, jrefproto));
1992 void convert_servername_decl PROTO ((struct parse *, jrefproto));
1993 void convert_ip_addr_or_hostname PROTO ((struct parse *, jrefproto, int));
1994 void convert_fixed_addr_decl PROTO ((struct parse *, jrefproto));
1995 void convert_option_decl PROTO ((struct parse *, jrefproto));
1996 void convert_timestamp PROTO ((struct parse *, jrefproto));
1997 void convert_lease_statement PROTO ((struct parse *, jrefproto));
1998 void convert_address_range PROTO ((struct parse *, jrefproto));
1999 void convert_date PROTO ((struct parse *, jrefproto, char *));
2000 void convert_numeric_aggregate PROTO ((struct parse *, jrefproto, int, int, int, int));
2001 void indent PROTO ((int));
2002
2003 /* route.c */
2004 void add_route_direct PROTO ((struct interface_info *, struct in_addr));
2005 void add_route_net PROTO ((struct interface_info *, struct in_addr,
2006                            struct in_addr));
2007 void add_route_default_gateway PROTO ((struct interface_info *, 
2008                                        struct in_addr));
2009 void remove_routes PROTO ((struct in_addr));
2010 void remove_if_route PROTO ((struct interface_info *, struct in_addr));
2011 void remove_all_if_routes PROTO ((struct interface_info *));
2012 void set_netmask PROTO ((struct interface_info *, struct in_addr));
2013 void set_broadcast_addr PROTO ((struct interface_info *, struct in_addr));
2014 void set_ip_address PROTO ((struct interface_info *, struct in_addr));
2015
2016 /* clparse.c */
2017 isc_result_t read_client_conf PROTO ((void));
2018 int read_client_conf_file (const char *,
2019                            struct interface_info *, struct client_config *);
2020 void read_client_leases PROTO ((void));
2021 void parse_client_statement PROTO ((struct parse *, struct interface_info *,
2022                                     struct client_config *));
2023 int parse_X PROTO ((struct parse *, u_int8_t *, unsigned));
2024 void parse_option_list PROTO ((struct parse *, u_int32_t **));
2025 void parse_interface_declaration PROTO ((struct parse *,
2026                                          struct client_config *, char *));
2027 int interface_or_dummy PROTO ((struct interface_info **, const char *));
2028 void make_client_state PROTO ((struct client_state **));
2029 void make_client_config PROTO ((struct client_state *,
2030                                 struct client_config *));
2031 void parse_client_lease_statement PROTO ((struct parse *, int));
2032 void parse_client_lease_declaration PROTO ((struct parse *,
2033                                             struct client_lease *,
2034                                             struct interface_info **,
2035                                             struct client_state **));
2036 int parse_option_decl PROTO ((struct option_cache **, struct parse *));
2037 void parse_string_list PROTO ((struct parse *, struct string_list **, int));
2038 int parse_ip_addr PROTO ((struct parse *, struct iaddr *));
2039 void parse_reject_statement PROTO ((struct parse *, struct client_config *));
2040
2041 /* dhcrelay.c */
2042 void relay PROTO ((struct interface_info *, struct dhcp_packet *, unsigned,
2043                    unsigned int, struct iaddr, struct hardware *));
2044 int strip_relay_agent_options PROTO ((struct interface_info *,
2045                                       struct interface_info **,
2046                                       struct dhcp_packet *, unsigned));
2047 int find_interface_by_agent_option PROTO ((struct dhcp_packet *,
2048                                            struct interface_info **,
2049                                            u_int8_t *, int));
2050 int add_relay_agent_options PROTO ((struct interface_info *,
2051                                     struct dhcp_packet *,
2052                                     unsigned, struct in_addr));
2053
2054 /* icmp.c */
2055 OMAPI_OBJECT_ALLOC_DECL (icmp_state, struct icmp_state, dhcp_type_icmp)
2056 extern struct icmp_state *icmp_state;
2057 void icmp_startup PROTO ((int, void (*) PROTO ((struct iaddr,
2058                                                 u_int8_t *, int))));
2059 int icmp_readsocket PROTO ((omapi_object_t *));
2060 int icmp_echorequest PROTO ((struct iaddr *));
2061 isc_result_t icmp_echoreply PROTO ((omapi_object_t *));
2062
2063 /* dns.c */
2064 #if defined (NSUPDATE)
2065 isc_result_t find_tsig_key (ns_tsig_key **, const char *, struct dns_zone *);
2066 void tkey_free (ns_tsig_key **);
2067 #endif
2068 isc_result_t enter_dns_zone (struct dns_zone *);
2069 isc_result_t dns_zone_lookup (struct dns_zone **, const char *);
2070 int dns_zone_dereference PROTO ((struct dns_zone **, const char *, int));
2071 #if defined (NSUPDATE)
2072 isc_result_t find_cached_zone (const char *, ns_class, char *,
2073                                size_t, struct in_addr *, int, int *,
2074                                struct dns_zone **);
2075 void forget_zone (struct dns_zone **);
2076 void repudiate_zone (struct dns_zone **);
2077 void cache_found_zone (ns_class, char *, struct in_addr *, int);
2078 int get_dhcid (struct data_string *, int, const u_int8_t *, unsigned);
2079 isc_result_t ddns_update_a (struct data_string *, struct iaddr,
2080                             struct data_string *, unsigned long, int);
2081 isc_result_t ddns_remove_a (struct data_string *,
2082                             struct iaddr, struct data_string *);
2083 #endif /* NSUPDATE */
2084
2085 /* resolv.c */
2086 extern char path_resolv_conf [];
2087 struct name_server *name_servers;
2088 struct domain_search_list *domains;
2089
2090 void read_resolv_conf PROTO ((TIME));
2091 struct name_server *first_name_server PROTO ((void));
2092
2093 /* inet_addr.c */
2094 #ifdef NEED_INET_ATON
2095 int inet_aton PROTO ((const char *, struct in_addr *));
2096 #endif
2097
2098 /* class.c */
2099 extern int have_billing_classes;
2100 struct class unknown_class;
2101 struct class known_class;
2102 struct collection default_collection;
2103 struct collection *collections;
2104 struct executable_statement *default_classification_rules;
2105
2106 void classification_setup PROTO ((void));
2107 void classify_client PROTO ((struct packet *));
2108 int check_collection PROTO ((struct packet *, struct lease *,
2109                              struct collection *));
2110 void classify PROTO ((struct packet *, struct class *));
2111 isc_result_t find_class PROTO ((struct class **, const char *,
2112                                 const char *, int));
2113 int unbill_class PROTO ((struct lease *, struct class *));
2114 int bill_class PROTO ((struct lease *, struct class *));
2115
2116 /* execute.c */
2117 int execute_statements PROTO ((struct binding_value **result,
2118                                struct packet *, struct lease *,
2119                                struct client_state *,
2120                                struct option_state *, struct option_state *,
2121                                struct binding_scope **,
2122                                struct executable_statement *));
2123 void execute_statements_in_scope PROTO ((struct binding_value **result,
2124                                          struct packet *, struct lease *,
2125                                          struct client_state *,
2126                                          struct option_state *,
2127                                          struct option_state *,
2128                                          struct binding_scope **,
2129                                          struct group *, struct group *));
2130 int executable_statement_dereference PROTO ((struct executable_statement **,
2131                                              const char *, int));
2132 void write_statements (FILE *, struct executable_statement *, int);
2133 int find_matching_case (struct executable_statement **,
2134                         struct packet *, struct lease *, struct client_state *,
2135                         struct option_state *, struct option_state *,
2136                         struct binding_scope **,
2137                         struct expression *, struct executable_statement *);
2138 int executable_statement_foreach (struct executable_statement *,
2139                                   int (*) (struct executable_statement *,
2140                                            void *, int), void *, int);
2141
2142 /* comapi.c */
2143 extern omapi_object_type_t *dhcp_type_interface;
2144 extern omapi_object_type_t *dhcp_type_group;
2145 extern omapi_object_type_t *dhcp_type_shared_network;
2146 extern omapi_object_type_t *dhcp_type_subnet;
2147 extern omapi_object_type_t *dhcp_type_control;
2148 extern dhcp_control_object_t *dhcp_control_object;
2149
2150 void dhcp_common_objects_setup (void);
2151
2152 isc_result_t dhcp_group_set_value  (omapi_object_t *, omapi_object_t *,
2153                                     omapi_data_string_t *,
2154                                     omapi_typed_data_t *);
2155 isc_result_t dhcp_group_get_value (omapi_object_t *, omapi_object_t *,
2156                                    omapi_data_string_t *,
2157                                    omapi_value_t **); 
2158 isc_result_t dhcp_group_destroy (omapi_object_t *, const char *, int);
2159 isc_result_t dhcp_group_signal_handler (omapi_object_t *,
2160                                         const char *, va_list);
2161 isc_result_t dhcp_group_stuff_values (omapi_object_t *,
2162                                       omapi_object_t *,
2163                                       omapi_object_t *);
2164 isc_result_t dhcp_group_lookup (omapi_object_t **,
2165                                 omapi_object_t *, omapi_object_t *);
2166 isc_result_t dhcp_group_create (omapi_object_t **,
2167                                 omapi_object_t *);
2168 isc_result_t dhcp_group_remove (omapi_object_t *,
2169                                 omapi_object_t *);
2170
2171 isc_result_t dhcp_control_set_value  (omapi_object_t *, omapi_object_t *,
2172                                       omapi_data_string_t *,
2173                                       omapi_typed_data_t *);
2174 isc_result_t dhcp_control_get_value (omapi_object_t *, omapi_object_t *,
2175                                      omapi_data_string_t *,
2176                                      omapi_value_t **); 
2177 isc_result_t dhcp_control_destroy (omapi_object_t *, const char *, int);
2178 isc_result_t dhcp_control_signal_handler (omapi_object_t *,
2179                                           const char *, va_list);
2180 isc_result_t dhcp_control_stuff_values (omapi_object_t *,
2181                                         omapi_object_t *,
2182                                         omapi_object_t *);
2183 isc_result_t dhcp_control_lookup (omapi_object_t **,
2184                                   omapi_object_t *, omapi_object_t *);
2185 isc_result_t dhcp_control_create (omapi_object_t **,
2186                                   omapi_object_t *);
2187 isc_result_t dhcp_control_remove (omapi_object_t *,
2188                                   omapi_object_t *);
2189
2190 isc_result_t dhcp_subnet_set_value  (omapi_object_t *, omapi_object_t *,
2191                                      omapi_data_string_t *,
2192                                      omapi_typed_data_t *);
2193 isc_result_t dhcp_subnet_get_value (omapi_object_t *, omapi_object_t *,
2194                                     omapi_data_string_t *,
2195                                     omapi_value_t **); 
2196 isc_result_t dhcp_subnet_destroy (omapi_object_t *, const char *, int);
2197 isc_result_t dhcp_subnet_signal_handler (omapi_object_t *,
2198                                          const char *, va_list);
2199 isc_result_t dhcp_subnet_stuff_values (omapi_object_t *,
2200                                        omapi_object_t *,
2201                                        omapi_object_t *);
2202 isc_result_t dhcp_subnet_lookup (omapi_object_t **,
2203                                  omapi_object_t *, omapi_object_t *);
2204 isc_result_t dhcp_subnet_create (omapi_object_t **,
2205                                  omapi_object_t *);
2206 isc_result_t dhcp_subnet_remove (omapi_object_t *,
2207                                  omapi_object_t *);
2208
2209 isc_result_t dhcp_shared_network_set_value  (omapi_object_t *,
2210                                              omapi_object_t *,
2211                                              omapi_data_string_t *,
2212                                              omapi_typed_data_t *);
2213 isc_result_t dhcp_shared_network_get_value (omapi_object_t *,
2214                                             omapi_object_t *,
2215                                             omapi_data_string_t *,
2216                                             omapi_value_t **); 
2217 isc_result_t dhcp_shared_network_destroy (omapi_object_t *, const char *, int);
2218 isc_result_t dhcp_shared_network_signal_handler (omapi_object_t *,
2219                                                  const char *, va_list);
2220 isc_result_t dhcp_shared_network_stuff_values (omapi_object_t *,
2221                                                omapi_object_t *,
2222                                                omapi_object_t *);
2223 isc_result_t dhcp_shared_network_lookup (omapi_object_t **,
2224                                          omapi_object_t *, omapi_object_t *);
2225 isc_result_t dhcp_shared_network_create (omapi_object_t **,
2226                                          omapi_object_t *);
2227 isc_result_t dhcp_shared_network_remove (omapi_object_t *,
2228                                          omapi_object_t *);
2229
2230 /* omapi.c */
2231 extern int (*dhcp_interface_shutdown_hook) (struct interface_info *);
2232
2233 extern omapi_object_type_t *dhcp_type_lease;
2234 extern omapi_object_type_t *dhcp_type_pool;
2235 extern omapi_object_type_t *dhcp_type_class;
2236
2237 #if defined (FAILOVER_PROTOCOL)
2238 extern omapi_object_type_t *dhcp_type_failover_state;
2239 extern omapi_object_type_t *dhcp_type_failover_link;
2240 extern omapi_object_type_t *dhcp_type_failover_listener;
2241 #endif
2242
2243 void dhcp_db_objects_setup (void);
2244
2245 isc_result_t dhcp_lease_set_value  (omapi_object_t *, omapi_object_t *,
2246                                     omapi_data_string_t *,
2247                                     omapi_typed_data_t *);
2248 isc_result_t dhcp_lease_get_value (omapi_object_t *, omapi_object_t *,
2249                                    omapi_data_string_t *,
2250                                    omapi_value_t **); 
2251 isc_result_t dhcp_lease_destroy (omapi_object_t *, const char *, int);
2252 isc_result_t dhcp_lease_signal_handler (omapi_object_t *,
2253                                         const char *, va_list);
2254 isc_result_t dhcp_lease_stuff_values (omapi_object_t *,
2255                                       omapi_object_t *,
2256                                       omapi_object_t *);
2257 isc_result_t dhcp_lease_lookup (omapi_object_t **,
2258                                 omapi_object_t *, omapi_object_t *);
2259 isc_result_t dhcp_lease_create (omapi_object_t **,
2260                                 omapi_object_t *);
2261 isc_result_t dhcp_lease_remove (omapi_object_t *,
2262                                 omapi_object_t *);
2263 isc_result_t dhcp_group_set_value  (omapi_object_t *, omapi_object_t *,
2264                                     omapi_data_string_t *,
2265                                     omapi_typed_data_t *);
2266 isc_result_t dhcp_group_get_value (omapi_object_t *, omapi_object_t *,
2267                                    omapi_data_string_t *,
2268                                    omapi_value_t **); 
2269 isc_result_t dhcp_group_destroy (omapi_object_t *, const char *, int);
2270 isc_result_t dhcp_group_signal_handler (omapi_object_t *,
2271                                         const char *, va_list);
2272 isc_result_t dhcp_group_stuff_values (omapi_object_t *,
2273                                       omapi_object_t *,
2274                                       omapi_object_t *);
2275 isc_result_t dhcp_group_lookup (omapi_object_t **,
2276                                 omapi_object_t *, omapi_object_t *);
2277 isc_result_t dhcp_group_create (omapi_object_t **,
2278                                 omapi_object_t *);
2279 isc_result_t dhcp_group_remove (omapi_object_t *,
2280                                 omapi_object_t *);
2281 isc_result_t dhcp_host_set_value  (omapi_object_t *, omapi_object_t *,
2282                                    omapi_data_string_t *,
2283                                    omapi_typed_data_t *);
2284 isc_result_t dhcp_host_get_value (omapi_object_t *, omapi_object_t *,
2285                                   omapi_data_string_t *,
2286                                   omapi_value_t **); 
2287 isc_result_t dhcp_host_destroy (omapi_object_t *, const char *, int);
2288 isc_result_t dhcp_host_signal_handler (omapi_object_t *,
2289                                        const char *, va_list);
2290 isc_result_t dhcp_host_stuff_values (omapi_object_t *,
2291                                      omapi_object_t *,
2292                                      omapi_object_t *);
2293 isc_result_t dhcp_host_lookup (omapi_object_t **,
2294                                omapi_object_t *, omapi_object_t *);
2295 isc_result_t dhcp_host_create (omapi_object_t **,
2296                                omapi_object_t *);
2297 isc_result_t dhcp_host_remove (omapi_object_t *,
2298                                omapi_object_t *);
2299 isc_result_t dhcp_pool_set_value  (omapi_object_t *, omapi_object_t *,
2300                                    omapi_data_string_t *,
2301                                    omapi_typed_data_t *);
2302 isc_result_t dhcp_pool_get_value (omapi_object_t *, omapi_object_t *,
2303                                   omapi_data_string_t *,
2304                                   omapi_value_t **); 
2305 isc_result_t dhcp_pool_destroy (omapi_object_t *, const char *, int);
2306 isc_result_t dhcp_pool_signal_handler (omapi_object_t *,
2307                                        const char *, va_list);
2308 isc_result_t dhcp_pool_stuff_values (omapi_object_t *,
2309                                      omapi_object_t *,
2310                                      omapi_object_t *);
2311 isc_result_t dhcp_pool_lookup (omapi_object_t **,
2312                                omapi_object_t *, omapi_object_t *);
2313 isc_result_t dhcp_pool_create (omapi_object_t **,
2314                                omapi_object_t *);
2315 isc_result_t dhcp_pool_remove (omapi_object_t *,
2316                                omapi_object_t *);
2317 isc_result_t dhcp_class_set_value  (omapi_object_t *, omapi_object_t *,
2318                                     omapi_data_string_t *,
2319                                     omapi_typed_data_t *);
2320 isc_result_t dhcp_class_get_value (omapi_object_t *, omapi_object_t *,
2321                                    omapi_data_string_t *,
2322                                    omapi_value_t **); 
2323 isc_result_t dhcp_class_destroy (omapi_object_t *, const char *, int);
2324 isc_result_t dhcp_class_signal_handler (omapi_object_t *,
2325                                         const char *, va_list);
2326 isc_result_t dhcp_class_stuff_values (omapi_object_t *,
2327                                       omapi_object_t *,
2328                                       omapi_object_t *);
2329 isc_result_t dhcp_class_lookup (omapi_object_t **,
2330                                 omapi_object_t *, omapi_object_t *);
2331 isc_result_t dhcp_class_create (omapi_object_t **,
2332                                 omapi_object_t *);
2333 isc_result_t dhcp_class_remove (omapi_object_t *,
2334                                 omapi_object_t *);
2335 isc_result_t dhcp_subclass_set_value  (omapi_object_t *, omapi_object_t *,
2336                                        omapi_data_string_t *,
2337                                        omapi_typed_data_t *);
2338 isc_result_t dhcp_subclass_get_value (omapi_object_t *, omapi_object_t *,
2339                                       omapi_data_string_t *,
2340                                       omapi_value_t **); 
2341 isc_result_t dhcp_subclass_destroy (omapi_object_t *, const char *, int);
2342 isc_result_t dhcp_subclass_signal_handler (omapi_object_t *,
2343                                            const char *, va_list);
2344 isc_result_t dhcp_subclass_stuff_values (omapi_object_t *,
2345                                          omapi_object_t *,
2346                                          omapi_object_t *);
2347 isc_result_t dhcp_subclass_lookup (omapi_object_t **,
2348                                    omapi_object_t *, omapi_object_t *);
2349 isc_result_t dhcp_subclass_create (omapi_object_t **,
2350                                    omapi_object_t *);
2351 isc_result_t dhcp_subclass_remove (omapi_object_t *,
2352                                    omapi_object_t *);
2353 isc_result_t dhcp_shared_network_set_value  (omapi_object_t *,
2354                                              omapi_object_t *,
2355                                              omapi_data_string_t *,
2356                                              omapi_typed_data_t *);
2357 isc_result_t dhcp_shared_network_get_value (omapi_object_t *, omapi_object_t *,
2358                                             omapi_data_string_t *,
2359                                             omapi_value_t **); 
2360 isc_result_t dhcp_shared_network_destroy (omapi_object_t *, const char *, int);
2361 isc_result_t dhcp_shared_network_signal_handler (omapi_object_t *,
2362                                                  const char *, va_list);
2363 isc_result_t dhcp_shared_network_stuff_values (omapi_object_t *,
2364                                                omapi_object_t *,
2365                                                omapi_object_t *);
2366 isc_result_t dhcp_shared_network_lookup (omapi_object_t **,
2367                                          omapi_object_t *, omapi_object_t *);
2368 isc_result_t dhcp_shared_network_create (omapi_object_t **,
2369                                          omapi_object_t *);
2370 isc_result_t dhcp_subnet_set_value  (omapi_object_t *, omapi_object_t *,
2371                                      omapi_data_string_t *,
2372                                      omapi_typed_data_t *);
2373 isc_result_t dhcp_subnet_get_value (omapi_object_t *, omapi_object_t *,
2374                                     omapi_data_string_t *,
2375                                     omapi_value_t **); 
2376 isc_result_t dhcp_subnet_destroy (omapi_object_t *, const char *, int);
2377 isc_result_t dhcp_subnet_signal_handler (omapi_object_t *,
2378                                          const char *, va_list);
2379 isc_result_t dhcp_subnet_stuff_values (omapi_object_t *,
2380                                        omapi_object_t *,
2381                                        omapi_object_t *);
2382 isc_result_t dhcp_subnet_lookup (omapi_object_t **,
2383                                  omapi_object_t *, omapi_object_t *);
2384 isc_result_t dhcp_subnet_create (omapi_object_t **,
2385                                  omapi_object_t *);
2386 isc_result_t dhcp_interface_set_value (omapi_object_t *,
2387                                        omapi_object_t *,
2388                                        omapi_data_string_t *,
2389                                        omapi_typed_data_t *);
2390 isc_result_t dhcp_interface_get_value (omapi_object_t *,
2391                                        omapi_object_t *,
2392                                        omapi_data_string_t *,
2393                                        omapi_value_t **);
2394 isc_result_t dhcp_interface_destroy (omapi_object_t *,
2395                                      const char *, int);
2396 isc_result_t dhcp_interface_signal_handler (omapi_object_t *,
2397                                             const char *,
2398                                             va_list ap);
2399 isc_result_t dhcp_interface_stuff_values (omapi_object_t *,
2400                                           omapi_object_t *,
2401                                           omapi_object_t *);
2402 isc_result_t dhcp_interface_lookup (omapi_object_t **,
2403                                     omapi_object_t *,
2404                                     omapi_object_t *);
2405 isc_result_t dhcp_interface_create (omapi_object_t **,
2406                                     omapi_object_t *);
2407 isc_result_t dhcp_interface_remove (omapi_object_t *,
2408                                     omapi_object_t *);
2409 void interface_stash (struct interface_info *);
2410 void interface_snorf (struct interface_info *, int);
2411
2412 isc_result_t binding_scope_set_value (struct binding_scope *, int,
2413                                       omapi_data_string_t *,
2414                                       omapi_typed_data_t *);
2415 isc_result_t binding_scope_get_value (omapi_value_t **,
2416                                       struct binding_scope *,
2417                                       omapi_data_string_t *);
2418 isc_result_t binding_scope_stuff_values (omapi_object_t *,
2419                                          struct binding_scope *);
2420
2421 /* mdb.c */
2422
2423 extern struct subnet *subnets;
2424 extern struct shared_network *shared_networks;
2425 extern host_hash_t *host_hw_addr_hash;
2426 extern host_hash_t *host_uid_hash;
2427 extern host_hash_t *host_name_hash;
2428 extern lease_hash_t *lease_uid_hash;
2429 extern lease_hash_t *lease_ip_addr_hash;
2430 extern lease_hash_t *lease_hw_addr_hash;
2431
2432 extern omapi_object_type_t *dhcp_type_host;
2433
2434 isc_result_t enter_host PROTO ((struct host_decl *, int, int));
2435 isc_result_t delete_host PROTO ((struct host_decl *, int));
2436 int find_hosts_by_haddr PROTO ((struct host_decl **, int,
2437                                 const unsigned char *, unsigned,
2438                                 const char *, int));
2439 int find_hosts_by_uid PROTO ((struct host_decl **, const unsigned char *,
2440                               unsigned, const char *, int));
2441 int find_host_for_network PROTO ((struct subnet **, struct host_decl **,
2442                                   struct iaddr *, struct shared_network *));
2443 void new_address_range PROTO ((struct parse *, struct iaddr, struct iaddr,
2444                                struct subnet *, struct pool *,
2445                                struct lease **));
2446 isc_result_t dhcp_lease_free (omapi_object_t *, const char *, int);
2447 isc_result_t dhcp_lease_get (omapi_object_t **, const char *, int);
2448 int find_grouped_subnet PROTO ((struct subnet **, struct shared_network *,
2449                                 struct iaddr, const char *, int));
2450 int find_subnet (struct subnet **, struct iaddr, const char *, int);
2451 void enter_shared_network PROTO ((struct shared_network *));
2452 void new_shared_network_interface PROTO ((struct parse *,
2453                                           struct shared_network *,
2454                                           const char *));
2455 int subnet_inner_than PROTO ((struct subnet *, struct subnet *, int));
2456 void enter_subnet PROTO ((struct subnet *));
2457 void enter_lease PROTO ((struct lease *));
2458 int supersede_lease PROTO ((struct lease *, struct lease *, int, int, int));
2459 void make_binding_state_transition (struct lease *);
2460 int lease_copy PROTO ((struct lease **, struct lease *, const char *, int));
2461 void release_lease PROTO ((struct lease *, struct packet *));
2462 void abandon_lease PROTO ((struct lease *, const char *));
2463 void dissociate_lease PROTO ((struct lease *));
2464 void pool_timer PROTO ((void *));
2465 int find_lease_by_uid PROTO ((struct lease **, const unsigned char *,
2466                               unsigned, const char *, int));
2467 int find_lease_by_hw_addr PROTO ((struct lease **, const unsigned char *,
2468                                   unsigned, const char *, int));
2469 int find_lease_by_ip_addr PROTO ((struct lease **, struct iaddr,
2470                                   const char *, int));
2471 void uid_hash_add PROTO ((struct lease *));
2472 void uid_hash_delete PROTO ((struct lease *));
2473 void hw_hash_add PROTO ((struct lease *));
2474 void hw_hash_delete PROTO ((struct lease *));
2475 int write_leases PROTO ((void));
2476 int lease_enqueue (struct lease *);
2477 void lease_instantiate (const unsigned char *, unsigned, struct lease *);
2478 void expire_all_pools PROTO ((void));
2479 void dump_subnets PROTO ((void));
2480 #if defined (DEBUG_MEMORY_LEAKAGE) || \
2481                 defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
2482 void free_everything (void);
2483 #endif
2484
2485 /* nsupdate.c */
2486 char *ddns_rev_name (struct lease *, struct lease_state *, struct packet *);
2487 char *ddns_fwd_name (struct lease *, struct lease_state *, struct packet *);
2488 int nsupdateA (const char *, const unsigned char *, u_int32_t, int);
2489 int nsupdatePTR (const char *, const unsigned char *, u_int32_t, int);
2490 void nsupdate (struct lease *, struct lease_state *, struct packet *, int);
2491 int updateA (const struct data_string *, const struct data_string *,
2492              unsigned int, struct lease *);
2493 int updatePTR (const struct data_string *, const struct data_string *,
2494                unsigned int, struct lease *);
2495 int deleteA (const struct data_string *, const struct data_string *,
2496              struct lease *);
2497 int deletePTR (const struct data_string *, const struct data_string *,
2498                struct lease *);
2499
2500 /* failover.c */
2501 #if defined (FAILOVER_PROTOCOL)
2502 extern dhcp_failover_state_t *failover_states;
2503 void dhcp_failover_startup PROTO ((void));
2504 int dhcp_failover_write_all_states (void);
2505 isc_result_t enter_failover_peer PROTO ((dhcp_failover_state_t *));
2506 isc_result_t find_failover_peer PROTO ((dhcp_failover_state_t **,
2507                                         const char *, const char *, int));
2508 isc_result_t dhcp_failover_link_initiate PROTO ((omapi_object_t *));
2509 isc_result_t dhcp_failover_link_signal PROTO ((omapi_object_t *,
2510                                                const char *, va_list));
2511 isc_result_t dhcp_failover_link_set_value PROTO ((omapi_object_t *,
2512                                                   omapi_object_t *,
2513                                                   omapi_data_string_t *,
2514                                                   omapi_typed_data_t *));
2515 isc_result_t dhcp_failover_link_get_value PROTO ((omapi_object_t *,
2516                                                   omapi_object_t *,
2517                                                   omapi_data_string_t *,
2518                                                   omapi_value_t **));
2519 isc_result_t dhcp_failover_link_destroy PROTO ((omapi_object_t *,
2520                                                 const char *, int));
2521 isc_result_t dhcp_failover_link_stuff_values PROTO ((omapi_object_t *,
2522                                                      omapi_object_t *,
2523                                                      omapi_object_t *));
2524 isc_result_t dhcp_failover_listen PROTO ((omapi_object_t *));
2525
2526 isc_result_t dhcp_failover_listener_signal PROTO ((omapi_object_t *,
2527                                                    const char *,
2528                                                    va_list));
2529 isc_result_t dhcp_failover_listener_set_value PROTO ((omapi_object_t *,
2530                                                       omapi_object_t *,
2531                                                       omapi_data_string_t *,
2532                                                       omapi_typed_data_t *));
2533 isc_result_t dhcp_failover_listener_get_value PROTO ((omapi_object_t *,
2534                                                       omapi_object_t *,
2535                                                       omapi_data_string_t *,
2536                                                       omapi_value_t **));
2537 isc_result_t dhcp_failover_listener_destroy PROTO ((omapi_object_t *,
2538                                                     const char *, int));
2539 isc_result_t dhcp_failover_listener_stuff PROTO ((omapi_object_t *,
2540                                                   omapi_object_t *,
2541                                                   omapi_object_t *));
2542 isc_result_t dhcp_failover_register PROTO ((omapi_object_t *));
2543 isc_result_t dhcp_failover_state_signal PROTO ((omapi_object_t *,
2544                                                 const char *, va_list));
2545 isc_result_t dhcp_failover_state_transition (dhcp_failover_state_t *,
2546                                              const char *);
2547 isc_result_t dhcp_failover_set_service_state (dhcp_failover_state_t *state);
2548 isc_result_t dhcp_failover_set_state (dhcp_failover_state_t *,
2549                                       enum failover_state);
2550 isc_result_t dhcp_failover_peer_state_changed (dhcp_failover_state_t *,
2551                                                failover_message_t *);
2552 int dhcp_failover_pool_rebalance (dhcp_failover_state_t *);
2553 int dhcp_failover_pool_check (struct pool *);
2554 int dhcp_failover_state_pool_check (dhcp_failover_state_t *);
2555 void dhcp_failover_timeout (void *);
2556 void dhcp_failover_send_contact (void *);
2557 isc_result_t dhcp_failover_send_state (dhcp_failover_state_t *);
2558 isc_result_t dhcp_failover_send_updates (dhcp_failover_state_t *);
2559 int dhcp_failover_queue_update (struct lease *, int);
2560 int dhcp_failover_send_acks (dhcp_failover_state_t *);
2561 void dhcp_failover_toack_queue_timeout (void *);
2562 int dhcp_failover_queue_ack (dhcp_failover_state_t *, failover_message_t *msg);
2563 void dhcp_failover_ack_queue_remove (dhcp_failover_state_t *, struct lease *);
2564 isc_result_t dhcp_failover_state_set_value PROTO ((omapi_object_t *,
2565                                                    omapi_object_t *,
2566                                                    omapi_data_string_t *,
2567                                                    omapi_typed_data_t *));
2568 void dhcp_failover_keepalive (void *);
2569 void dhcp_failover_reconnect (void *);
2570 void dhcp_failover_startup_timeout (void *);
2571 void dhcp_failover_link_startup_timeout (void *);
2572 void dhcp_failover_listener_restart (void *);
2573 isc_result_t dhcp_failover_state_get_value PROTO ((omapi_object_t *,
2574                                                    omapi_object_t *,
2575                                                    omapi_data_string_t *,
2576                                                    omapi_value_t **));
2577 isc_result_t dhcp_failover_state_destroy PROTO ((omapi_object_t *,
2578                                                  const char *, int));
2579 isc_result_t dhcp_failover_state_stuff PROTO ((omapi_object_t *,
2580                                                omapi_object_t *,
2581                                                omapi_object_t *));
2582 isc_result_t dhcp_failover_state_lookup PROTO ((omapi_object_t **,
2583                                                 omapi_object_t *,
2584                                                 omapi_object_t *));
2585 isc_result_t dhcp_failover_state_create PROTO ((omapi_object_t **,
2586                                                 omapi_object_t *));
2587 isc_result_t dhcp_failover_state_remove PROTO ((omapi_object_t *,
2588                                                omapi_object_t *));
2589 int dhcp_failover_state_match (dhcp_failover_state_t *, u_int8_t *, unsigned);
2590 const char *dhcp_failover_reject_reason_print (int);
2591 const char *dhcp_failover_state_name_print (enum failover_state);
2592 const char *dhcp_failover_message_name (unsigned);
2593 const char *dhcp_failover_option_name (unsigned);
2594 failover_option_t *dhcp_failover_option_printf (unsigned, char *,
2595                                                 unsigned *,
2596                                                 unsigned, 
2597                                                 const char *, ...)
2598         __attribute__((__format__(__printf__,5,6)));
2599 failover_option_t *dhcp_failover_make_option (unsigned, char *,
2600                                               unsigned *, unsigned, ...);
2601 isc_result_t dhcp_failover_put_message (dhcp_failover_link_t *,
2602                                         omapi_object_t *, int, ...);
2603 isc_result_t dhcp_failover_send_connect PROTO ((omapi_object_t *));
2604 isc_result_t dhcp_failover_send_connectack PROTO ((omapi_object_t *,
2605                                                    dhcp_failover_state_t *,
2606                                                    int, const char *));
2607 isc_result_t dhcp_failover_send_disconnect PROTO ((omapi_object_t *,
2608                                                    int, const char *));
2609 isc_result_t dhcp_failover_send_bind_update (dhcp_failover_state_t *,
2610                                              struct lease *);
2611 isc_result_t dhcp_failover_send_bind_ack (dhcp_failover_state_t *,
2612                                           failover_message_t *,
2613                                           int, const char *);
2614 isc_result_t dhcp_failover_send_poolreq (dhcp_failover_state_t *);
2615 isc_result_t dhcp_failover_send_poolresp (dhcp_failover_state_t *, int);
2616 isc_result_t dhcp_failover_send_update_request (dhcp_failover_state_t *);
2617 isc_result_t dhcp_failover_send_update_request_all (dhcp_failover_state_t *);
2618 isc_result_t dhcp_failover_send_update_done (dhcp_failover_state_t *);
2619 isc_result_t dhcp_failover_process_bind_update (dhcp_failover_state_t *,
2620                                                 failover_message_t *);
2621 isc_result_t dhcp_failover_process_bind_ack (dhcp_failover_state_t *,
2622                                              failover_message_t *);
2623 isc_result_t dhcp_failover_generate_update_queue (dhcp_failover_state_t *,
2624                                                   int);
2625 isc_result_t dhcp_failover_process_update_request (dhcp_failover_state_t *,
2626                                                    failover_message_t *);
2627 isc_result_t dhcp_failover_process_update_request_all (dhcp_failover_state_t *,
2628                                                        failover_message_t *);
2629 isc_result_t dhcp_failover_process_update_done (dhcp_failover_state_t *,
2630                                                 failover_message_t *);
2631 void dhcp_failover_recover_done (void *);
2632 void failover_print PROTO ((char *, unsigned *, unsigned, const char *));
2633 void update_partner PROTO ((struct lease *));
2634 int load_balance_mine (struct packet *, dhcp_failover_state_t *);
2635 binding_state_t normal_binding_state_transition_check (struct lease *,
2636                                                        dhcp_failover_state_t *,
2637                                                        binding_state_t,
2638                                                        u_int32_t);
2639 binding_state_t
2640 conflict_binding_state_transition_check (struct lease *,
2641                                          dhcp_failover_state_t *,
2642                                          binding_state_t, u_int32_t);
2643 int lease_mine_to_reallocate (struct lease *);
2644
2645 OMAPI_OBJECT_ALLOC_DECL (dhcp_failover_state, dhcp_failover_state_t,
2646                          dhcp_type_failover_state)
2647 OMAPI_OBJECT_ALLOC_DECL (dhcp_failover_listener, dhcp_failover_listener_t,
2648                          dhcp_type_failover_listener)
2649 OMAPI_OBJECT_ALLOC_DECL (dhcp_failover_link, dhcp_failover_link_t,
2650                          dhcp_type_failover_link)
2651 #endif /* FAILOVER_PROTOCOL */
2652
2653 const char *binding_state_print (enum failover_state);