1 /* $OpenBSD: dhcpd.h,v 1.33 2004/05/06 22:29:15 deraadt Exp $ */
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.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
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''.
42 #include <sys/types.h>
44 #include <sys/socket.h>
45 #include <sys/sockio.h>
52 #include <net/if_dl.h>
53 #include <net/route.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
77 #define REMOTE_PORT 67
85 struct string_list *next;
91 unsigned char iabuf[16];
95 struct iaddrlist *next;
100 struct dhcp_packet *raw;
105 struct iaddr client_addr;
106 struct interface_info *interface;
107 struct hardware *haddr;
108 struct option_data options[256];
117 struct client_lease {
118 struct client_lease *next;
119 time_t expiry, renewal, rebind;
120 struct iaddr address;
123 struct string_list *medium;
124 unsigned int is_static : 1;
125 unsigned int is_bootp : 1;
126 struct option_data options[256];
129 /* Possible states in which the client can be. */
140 struct client_config {
141 struct option_data defaults[256];
147 } default_actions[256];
149 struct option_data send_options[256];
150 u_int8_t required_options[256];
151 u_int8_t requested_options[256];
152 int requested_option_count;
154 time_t initial_interval;
155 time_t retry_interval;
156 time_t select_interval;
157 time_t reboot_timeout;
158 time_t backoff_cutoff;
159 struct string_list *media;
161 enum { IGNORE, ACCEPT, PREFER }
163 struct string_list *medium;
164 struct iaddrlist *reject_list;
167 struct client_state {
168 struct client_lease *active;
169 struct client_lease *new;
170 struct client_lease *offered_leases;
171 struct client_lease *leases;
172 struct client_lease *alias;
173 enum dhcp_state state;
174 struct iaddr destination;
177 time_t first_sending;
179 struct string_list *medium;
180 struct dhcp_packet packet;
182 struct iaddr requested_address;
183 struct client_config *config;
186 struct string_list *env;
190 struct interface_info {
191 struct interface_info *next;
192 struct hardware hw_address;
193 struct in_addr primary_address;
202 struct client_state *client;
210 struct timeout *next;
212 void (*func)(void *);
217 struct protocol *next;
219 void (*handler)(struct protocol *);
223 #define DEFAULT_HASH_SIZE 97
226 struct hash_bucket *next;
229 unsigned char *value;
234 struct hash_bucket *buckets[DEFAULT_HASH_SIZE];
237 /* Default path to dhcpd config file. */
238 #define _PATH_DHCLIENT_CONF "/etc/dhclient.conf"
239 #define _PATH_DHCLIENT_DB "/var/db/dhclient.leases"
240 #define DHCPD_LOG_FACILITY LOG_DAEMON
242 #define MAX_TIME 0x7fffffff
245 /* External definitions... */
248 int cons_options(struct packet *, struct dhcp_packet *, int,
249 struct tree_cache **, int, int, int, u_int8_t *, int);
250 char *pretty_print_option(unsigned int,
251 unsigned char *, int, int, int);
252 void do_packet(struct interface_info *, struct dhcp_packet *,
253 int, unsigned int, struct iaddr, struct hardware *);
256 extern int warnings_occurred;
257 void error(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
258 int warning(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
259 int note(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
260 int debug(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
261 int parse_warn(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
264 extern int lexline, lexchar;
265 extern char *token_line, *tlname;
266 extern char comments[4096];
267 extern int comment_index;
268 extern int eol_token;
269 void new_parse(char *);
270 int next_token(char **, FILE *);
271 int peek_token(char **, FILE *);
274 void skip_to_semi(FILE *);
275 int parse_semi(FILE *);
276 char *parse_string(FILE *);
277 int parse_ip_addr(FILE *, struct iaddr *);
278 void parse_hardware_param(FILE *, struct hardware *);
279 void parse_lease_time(FILE *, time_t *);
280 unsigned char *parse_numeric_aggregate(FILE *, unsigned char *, int *,
282 void convert_num(unsigned char *, char *, int, int);
283 time_t parse_date(FILE *);
286 pair cons(caddr_t, pair);
289 struct string_list *new_string_list(size_t size);
290 struct hash_table *new_hash_table(int);
291 struct hash_bucket *new_hash_bucket(void);
294 int if_register_bpf(struct interface_info *);
295 void if_register_send(struct interface_info *);
296 void if_register_receive(struct interface_info *);
297 ssize_t send_packet(struct interface_info *, struct dhcp_packet *, size_t,
298 struct in_addr, struct sockaddr_in *, struct hardware *);
299 ssize_t receive_packet(struct interface_info *, unsigned char *, size_t,
300 struct sockaddr_in *, struct hardware *);
303 extern void (*bootp_packet_handler)(struct interface_info *,
304 struct dhcp_packet *, int, unsigned int, struct iaddr, struct hardware *);
305 void discover_interfaces(struct interface_info *);
306 void reinitialize_interfaces(void);
308 void got_one(struct protocol *);
309 void add_timeout(time_t, void (*)(void *), void *);
310 void cancel_timeout(void (*)(void *), void *);
311 void add_protocol(char *, int, void (*)(struct protocol *), void *);
312 void remove_protocol(struct protocol *);
313 int interface_link_status(char *);
316 struct hash_table *new_hash(void);
317 void add_hash(struct hash_table *, unsigned char *, int, unsigned char *);
318 unsigned char *hash_lookup(struct hash_table *, unsigned char *, int);
321 extern struct option dhcp_options[256];
322 extern unsigned char dhcp_option_default_priority_list[];
323 extern int sizeof_dhcp_option_default_priority_list;
324 extern struct hash_table universe_hash;
325 extern struct universe dhcp_universe;
326 void initialize_universes(void);
329 u_int32_t getULong(unsigned char *);
330 int32_t getLong(unsigned char *);
331 u_int16_t getUShort(unsigned char *);
332 int16_t getShort(unsigned char *);
333 void putULong(unsigned char *, u_int32_t);
334 void putLong(unsigned char *, int32_t);
335 void putUShort(unsigned char *, unsigned int);
336 void putShort(unsigned char *, int);
339 struct iaddr subnet_number(struct iaddr, struct iaddr);
340 struct iaddr broadcast_addr(struct iaddr, struct iaddr);
341 int addr_eq(struct iaddr, struct iaddr);
342 char *piaddr(struct iaddr);
345 extern char *path_dhclient_conf;
346 extern char *path_dhclient_db;
347 extern time_t cur_time;
348 extern int log_priority;
349 extern int log_perror;
351 extern struct client_config top_level_config;
353 void dhcpoffer(struct packet *);
354 void dhcpack(struct packet *);
355 void dhcpnak(struct packet *);
357 void send_discover(void *);
358 void send_request(void *);
359 void send_decline(void *);
361 void state_reboot(void *);
362 void state_init(void *);
363 void state_selecting(void *);
364 void state_requesting(void *);
365 void state_bound(void *);
366 void state_panic(void *);
368 void bind_lease(struct interface_info *);
370 void make_discover(struct interface_info *, struct client_lease *);
371 void make_request(struct interface_info *, struct client_lease *);
372 void make_decline(struct interface_info *, struct client_lease *);
374 void free_client_lease(struct client_lease *);
375 void rewrite_client_leases(void);
376 void write_client_lease(struct interface_info *, struct client_lease *, int);
378 void priv_script_init(char *, char *);
379 void priv_script_write_params(char *, struct client_lease *);
380 int priv_script_go(void);
382 void script_init(char *, struct string_list *);
383 void script_write_params(char *, struct client_lease *);
385 void client_envadd(struct client_state *,
386 const char *, const char *, const char *, ...);
387 void script_set_env(struct client_state *, const char *, const char *,
389 void script_flush_env(struct client_state *);
390 int dhcp_option_ev_name(char *, size_t, struct option *);
392 struct client_lease *packet_to_lease(struct packet *);
393 void go_daemon(void);
394 void client_location_changed(void);
396 void bootp(struct packet *);
397 void dhcp(struct packet *);
400 void assemble_hw_header(struct interface_info *, unsigned char *,
401 int *, struct hardware *);
402 void assemble_udp_ip_header(unsigned char *, int *, u_int32_t, u_int32_t,
403 unsigned int, unsigned char *, int);
404 ssize_t decode_hw_header(unsigned char *, int, struct hardware *);
405 ssize_t decode_udp_ip_header(unsigned char *, int, struct sockaddr_in *,
406 unsigned char *, int);
409 void assemble_ethernet_header(struct interface_info *, unsigned char *,
410 int *, struct hardware *);
411 ssize_t decode_ethernet_header(struct interface_info *, unsigned char *,
412 int, struct hardware *);
415 int read_client_conf(void);
416 void read_client_leases(void);
417 void parse_client_statement(FILE *, struct interface_info *,
418 struct client_config *);
419 int parse_X(FILE *, u_int8_t *, int);
420 int parse_option_list(FILE *, u_int8_t *);
421 void parse_interface_declaration(FILE *, struct client_config *);
422 struct interface_info *interface_or_dummy(char *);
423 void make_client_state(struct interface_info *);
424 void make_client_config(struct interface_info *, struct client_config *);
425 void parse_client_lease_statement(FILE *, int);
426 void parse_client_lease_declaration(FILE *, struct client_lease *,
427 struct interface_info **);
428 struct option *parse_option_decl(FILE *, struct option_data *);
429 void parse_string_list(FILE *, struct string_list **, int);
430 void parse_reject_statement(FILE *, struct client_config *);
433 struct buf *buf_open(size_t);
434 int buf_add(struct buf *, void *, size_t);
435 int buf_close(int, struct buf *);
436 ssize_t buf_read(int, void *, size_t);
437 void dispatch_imsg(int);