[DHCP]
[reactos.git] / reactos / base / services / dhcp / include / dhcpd.h
1 /* $OpenBSD: dhcpd.h,v 1.33 2004/05/06 22:29:15 deraadt Exp $ */
2
3 /*
4 * Copyright (c) 2004 Henning Brauer <henning@openbsd.org>
5 * Copyright (c) 1995, 1996, 1997, 1998, 1999
6 * The Internet Software Consortium. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of The Internet Software Consortium nor the names
18 * of its contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
22 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
23 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
29 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
30 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * This software has been written for the Internet Software Consortium
36 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
37 * Enterprises. To learn more about the Internet Software Consortium,
38 * see ``http://www.vix.com/isc''. To learn more about Vixie
39 * Enterprises, see ``http://www.vix.com''.
40 */
41
42 #pragma once
43
44 #include <winsock2.h>
45 #include <iphlpapi.h>
46 #include "stdint.h"
47
48 #define IFNAMSIZ MAX_INTERFACE_NAME_LEN
49
50 #define ETH_ALEN 6
51 #define ETHER_ADDR_LEN ETH_ALEN
52 #include <pshpack1.h>
53 struct ether_header
54 {
55 u_int8_t ether_dhost[ETH_ALEN]; /* destination eth addr */
56 u_int8_t ether_shost[ETH_ALEN]; /* source ether addr */
57 u_int16_t ether_type; /* packet type ID field */
58 };
59 #include <poppack.h>
60
61 struct ip
62 {
63 unsigned int ip_hl:4; /* header length */
64 unsigned int ip_v:4; /* version */
65 u_int8_t ip_tos; /* type of service */
66 u_short ip_len; /* total length */
67 u_short ip_id; /* identification */
68 u_short ip_off; /* fragment offset field */
69 #define IP_RF 0x8000 /* reserved fragment flag */
70 #define IP_DF 0x4000 /* dont fragment flag */
71 #define IP_MF 0x2000 /* more fragments flag */
72 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
73 u_int8_t ip_ttl; /* time to live */
74 u_int8_t ip_p; /* protocol */
75 u_short ip_sum; /* checksum */
76 struct in_addr ip_src, ip_dst; /* source and dest address */
77 };
78
79 struct udphdr {
80 u_int16_t uh_sport; /* source port */
81 u_int16_t uh_dport; /* destination port */
82 u_int16_t uh_ulen; /* udp length */
83 u_int16_t uh_sum; /* udp checksum */
84 };
85
86 #define ETHERTYPE_IP 0x0800
87 #define IPTOS_LOWDELAY 0x10
88 #define ARPHRD_ETHER 1
89
90 // FIXME: I have no idea what this should be!
91 #define SIZE_T_MAX 1600
92
93 #define USE_SOCKET_RECEIVE
94 #define USE_SOCKET_SEND
95
96 #include <sys/types.h>
97 #include <sys/stat.h>
98 //#include <sys/time.h>
99 #include <ctype.h>
100 #include <fcntl.h>
101 #include <limits.h>
102 //#include <unistd.h>
103 #include <stdio.h>
104 #include <stdlib.h>
105 #include <string.h>
106 #include <time.h>
107 //#include <unistd.h>
108
109 #include "dhcp.h"
110 #include "tree.h"
111
112 #define LOCAL_PORT 68
113 #define REMOTE_PORT 67
114
115 struct option_data {
116 int len;
117 u_int8_t *data;
118 };
119
120 struct string_list {
121 struct string_list *next;
122 char *string;
123 };
124
125 struct iaddr {
126 int len;
127 unsigned char iabuf[16];
128 };
129
130 struct iaddrlist {
131 struct iaddrlist *next;
132 struct iaddr addr;
133 };
134
135 struct packet {
136 struct dhcp_packet *raw;
137 int packet_length;
138 int packet_type;
139 int options_valid;
140 int client_port;
141 struct iaddr client_addr;
142 struct interface_info *interface;
143 struct hardware *haddr;
144 struct option_data options[256];
145 };
146
147 struct hardware {
148 u_int8_t htype;
149 u_int8_t hlen;
150 u_int8_t haddr[16];
151 };
152
153 struct client_lease {
154 struct client_lease *next;
155 time_t expiry, renewal, rebind;
156 struct iaddr address;
157 char *server_name;
158 #ifdef __REACTOS__
159 time_t obtained;
160 struct iaddr serveraddress;
161 #endif
162 char *filename;
163 struct string_list *medium;
164 unsigned int is_static : 1;
165 unsigned int is_bootp : 1;
166 struct option_data options[256];
167 };
168
169 /* Possible states in which the client can be. */
170 enum dhcp_state {
171 S_REBOOTING,
172 S_INIT,
173 S_SELECTING,
174 S_REQUESTING,
175 S_BOUND,
176 S_RENEWING,
177 S_REBINDING,
178 S_STATIC
179 };
180
181 struct client_config {
182 struct option_data defaults[256];
183 enum {
184 ACTION_DEFAULT,
185 ACTION_SUPERSEDE,
186 ACTION_PREPEND,
187 ACTION_APPEND
188 } default_actions[256];
189
190 struct option_data send_options[256];
191 u_int8_t required_options[256];
192 u_int8_t requested_options[256];
193 int requested_option_count;
194 time_t timeout;
195 time_t initial_interval;
196 time_t retry_interval;
197 time_t select_interval;
198 time_t reboot_timeout;
199 time_t backoff_cutoff;
200 struct string_list *media;
201 char *script_name;
202 enum { IGNORE, ACCEPT, PREFER }
203 bootp_policy;
204 struct string_list *medium;
205 struct iaddrlist *reject_list;
206 };
207
208 struct client_state {
209 struct client_lease *active;
210 struct client_lease *new;
211 struct client_lease *offered_leases;
212 struct client_lease *leases;
213 struct client_lease *alias;
214 enum dhcp_state state;
215 struct iaddr destination;
216 u_int32_t xid;
217 u_int16_t secs;
218 time_t first_sending;
219 time_t interval;
220 struct string_list *medium;
221 struct dhcp_packet packet;
222 int packet_length;
223 struct iaddr requested_address;
224 struct client_config *config;
225 };
226
227 struct interface_info {
228 struct interface_info *next;
229 struct hardware hw_address;
230 struct in_addr primary_address;
231 char name[IFNAMSIZ];
232 int rfdesc;
233 int wfdesc;
234 unsigned char *rbuf;
235 size_t rbuf_max;
236 size_t rbuf_offset;
237 size_t rbuf_len;
238 struct client_state *client;
239 int noifmedia;
240 int errors;
241 int dead;
242 u_int16_t index;
243 };
244
245 struct timeout {
246 struct timeout *next;
247 time_t when;
248 void (*func)(void *);
249 void *what;
250 };
251
252 struct protocol {
253 struct protocol *next;
254 int fd;
255 void (*handler)(struct protocol *);
256 void *local;
257 };
258
259 #define DEFAULT_HASH_SIZE 97
260
261 struct hash_bucket {
262 struct hash_bucket *next;
263 unsigned char *name;
264 int len;
265 unsigned char *value;
266 };
267
268 struct hash_table {
269 int hash_count;
270 struct hash_bucket *buckets[DEFAULT_HASH_SIZE];
271 };
272
273 /* Default path to dhcpd config file. */
274 #define _PATH_DHCLIENT_CONF "/etc/dhclient.conf"
275 #define _PATH_DHCLIENT_DB "/var/db/dhclient.leases"
276 #define DHCPD_LOG_FACILITY LOG_DAEMON
277
278 #define MAX_TIME 0x7fffffff
279 #define MIN_TIME 0
280
281 /* External definitions... */
282
283 /* options.c */
284 int cons_options(struct packet *, struct dhcp_packet *, int,
285 struct tree_cache **, int, int, int, u_int8_t *, int);
286 char *pretty_print_option(unsigned int,
287 unsigned char *, int, int, int);
288 void do_packet(struct interface_info *, struct dhcp_packet *,
289 int, unsigned int, struct iaddr, struct hardware *);
290
291 /* errwarn.c */
292 extern int warnings_occurred;
293 #ifdef _MSC_VER
294 void error(char *, ...);
295 int warning(char *, ...);
296 int note(char *, ...);
297 int debug(char *, ...);
298 int parse_warn(char *, ...);
299 #else
300 void error(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
301 int warning(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
302 int note(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
303 int debug(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
304 int parse_warn(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
305 #endif
306
307 /* conflex.c */
308 extern int lexline, lexchar;
309 extern char *token_line, *tlname;
310 extern char comments[4096];
311 extern int comment_index;
312 extern int eol_token;
313 void new_parse(char *);
314 int next_token(char **, FILE *);
315 int peek_token(char **, FILE *);
316
317 /* parse.c */
318 void skip_to_semi(FILE *);
319 int parse_semi(FILE *);
320 char *parse_string(FILE *);
321 int parse_ip_addr(FILE *, struct iaddr *);
322 void parse_hardware_param(FILE *, struct hardware *);
323 void parse_lease_time(FILE *, time_t *);
324 unsigned char *parse_numeric_aggregate(FILE *, unsigned char *, int *,
325 int, int, int);
326 void convert_num(unsigned char *, char *, int, int);
327 time_t parse_date(FILE *);
328
329 /* tree.c */
330 pair cons(caddr_t, pair);
331
332 /* alloc.c */
333 struct string_list *new_string_list(size_t size);
334 struct hash_table *new_hash_table(int);
335 struct hash_bucket *new_hash_bucket(void);
336 void dfree(void *, char *);
337 void free_hash_bucket(struct hash_bucket *, char *);
338
339
340 /* bpf.c */
341 int if_register_bpf(struct interface_info *);
342 void if_register_send(struct interface_info *);
343 void if_register_receive(struct interface_info *);
344 ssize_t send_packet(struct interface_info *, struct dhcp_packet *, size_t,
345 struct in_addr, struct sockaddr_in *, struct hardware *);
346 ssize_t receive_packet(struct interface_info *, unsigned char *, size_t,
347 struct sockaddr_in *, struct hardware *);
348
349 /* dispatch.c */
350 extern void (*bootp_packet_handler)(struct interface_info *,
351 struct dhcp_packet *, int, unsigned int, struct iaddr, struct hardware *);
352 void discover_interfaces(struct interface_info *);
353 void reinitialize_interfaces(void);
354 void dispatch(void);
355 void got_one(struct protocol *);
356 void add_timeout(time_t, void (*)(void *), void *);
357 void cancel_timeout(void (*)(void *), void *);
358 void add_protocol(char *, int, void (*)(struct protocol *), void *);
359 void remove_protocol(struct protocol *);
360 struct protocol *find_protocol_by_adapter( struct interface_info * );
361 int interface_link_status(char *);
362
363 /* hash.c */
364 struct hash_table *new_hash(void);
365 void add_hash(struct hash_table *, unsigned char *, int, unsigned char *);
366 unsigned char *hash_lookup(struct hash_table *, unsigned char *, int);
367
368 /* tables.c */
369 extern struct dhcp_option dhcp_options[256];
370 extern unsigned char dhcp_option_default_priority_list[];
371 extern int sizeof_dhcp_option_default_priority_list;
372 extern struct hash_table universe_hash;
373 extern struct universe dhcp_universe;
374 void initialize_universes(void);
375
376 /* convert.c */
377 u_int32_t getULong(unsigned char *);
378 int32_t getLong(unsigned char *);
379 u_int16_t getUShort(unsigned char *);
380 int16_t getShort(unsigned char *);
381 void putULong(unsigned char *, u_int32_t);
382 void putLong(unsigned char *, int32_t);
383 void putUShort(unsigned char *, unsigned int);
384 void putShort(unsigned char *, int);
385
386 /* inet.c */
387 struct iaddr subnet_number(struct iaddr, struct iaddr);
388 struct iaddr broadcast_addr(struct iaddr, struct iaddr);
389 int addr_eq(struct iaddr, struct iaddr);
390 char *piaddr(struct iaddr);
391
392 /* dhclient.c */
393 extern char *path_dhclient_conf;
394 extern char *path_dhclient_db;
395 extern time_t cur_time;
396 extern int log_priority;
397 extern int log_perror;
398
399 extern struct client_config top_level_config;
400
401 void dhcpoffer(struct packet *);
402 void dhcpack(struct packet *);
403 void dhcpnak(struct packet *);
404
405 void send_discover(void *);
406 void send_request(void *);
407 void send_decline(void *);
408
409 void state_reboot(void *);
410 void state_init(void *);
411 void state_selecting(void *);
412 void state_requesting(void *);
413 void state_bound(void *);
414 void state_panic(void *);
415
416 void bind_lease(struct interface_info *);
417
418 void make_discover(struct interface_info *, struct client_lease *);
419 void make_request(struct interface_info *, struct client_lease *);
420 void make_decline(struct interface_info *, struct client_lease *);
421
422 void free_client_lease(struct client_lease *);
423 void rewrite_client_leases(struct interface_info *);
424 void write_client_lease(struct interface_info *, struct client_lease *, int);
425
426 void priv_script_init(struct interface_info *, char *, char *);
427 void priv_script_write_params(struct interface_info *, char *, struct client_lease *);
428 int priv_script_go(void);
429
430 void script_init(char *, struct string_list *);
431 void script_write_params(char *, struct client_lease *);
432 int script_go(void);
433 void client_envadd(struct client_state *,
434 const char *, const char *, const char *, ...);
435 void script_set_env(struct client_state *, const char *, const char *,
436 const char *);
437 void script_flush_env(struct client_state *);
438 int dhcp_option_ev_name(char *, size_t, struct dhcp_option *);
439
440 struct client_lease *packet_to_lease(struct packet *);
441 void go_daemon(void);
442 void client_location_changed(void);
443
444 void bootp(struct packet *);
445 void dhcp(struct packet *);
446
447 /* packet.c */
448 void assemble_hw_header(struct interface_info *, unsigned char *,
449 int *, struct hardware *);
450 void assemble_udp_ip_header(unsigned char *, int *, u_int32_t, u_int32_t,
451 unsigned int, unsigned char *, int);
452 ssize_t decode_hw_header(unsigned char *, int, struct hardware *);
453 ssize_t decode_udp_ip_header(unsigned char *, int, struct sockaddr_in *,
454 unsigned char *, int);
455
456 /* ethernet.c */
457 void assemble_ethernet_header(struct interface_info *, unsigned char *,
458 int *, struct hardware *);
459 ssize_t decode_ethernet_header(struct interface_info *, unsigned char *,
460 int, struct hardware *);
461
462 /* clparse.c */
463 int read_client_conf(struct interface_info *);
464 void read_client_leases(void);
465 void parse_client_statement(FILE *, struct interface_info *,
466 struct client_config *);
467 int parse_X(FILE *, u_int8_t *, int);
468 int parse_option_list(FILE *, u_int8_t *);
469 void parse_interface_declaration(FILE *, struct client_config *);
470 struct interface_info *interface_or_dummy(char *);
471 void make_client_state(struct interface_info *);
472 void make_client_config(struct interface_info *, struct client_config *);
473 void parse_client_lease_statement(FILE *, int);
474 void parse_client_lease_declaration(FILE *, struct client_lease *,
475 struct interface_info **);
476 struct dhcp_option *parse_option_decl(FILE *, struct option_data *);
477 void parse_string_list(FILE *, struct string_list **, int);
478 void parse_reject_statement(FILE *, struct client_config *);
479
480 /* privsep.c */
481 struct buf *buf_open(size_t);
482 int buf_add(struct buf *, void *, size_t);
483 int buf_close(int, struct buf *);
484 ssize_t buf_read(int, void *, size_t);
485 void dispatch_imsg(int);