1 /* $OpenBSD: src/sbin/dhclient/dhcpd.h,v 1.71 2010/07/02 22:03:27 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/socket.h>
43 #include <sys/sockio.h>
46 #include <sys/types.h>
49 #include <arpa/inet.h>
51 #include <net/if_dl.h>
52 #include <net/route.h>
53 #include <netinet/in.h>
54 #include <netinet/if_ether.h>
73 #define REMOTE_PORT 67
86 struct string_list *next;
87 char string[1]; /* Actually bigger. */
92 unsigned char iabuf[16];
96 struct iaddrlist *next;
106 struct client_lease {
107 struct client_lease *next;
108 time_t expiry, renewal, rebind;
109 struct iaddr address;
112 struct string_list *medium;
113 unsigned int is_static : 1;
114 unsigned int is_bootp : 1;
115 struct option_data options[256];
118 /* Possible states in which the client can be. */
129 struct client_config {
130 struct option_data defaults[256];
136 } default_actions[256];
138 struct option_data send_options[256];
139 u_int8_t required_options[256];
140 u_int8_t requested_options[256];
141 int requested_option_count;
143 time_t initial_interval;
145 time_t retry_interval;
146 time_t select_interval;
147 time_t reboot_timeout;
148 time_t backoff_cutoff;
149 struct string_list *media;
151 enum { IGNORE, ACCEPT, PREFER }
153 struct string_list *medium;
154 struct iaddrlist *reject_list;
157 struct client_state {
158 struct client_lease *active;
159 struct client_lease *new;
160 struct client_lease *offered_leases;
161 struct client_lease *leases;
162 struct client_lease *alias;
163 enum dhcp_state state;
164 struct iaddr destination;
167 time_t first_sending;
169 struct string_list *medium;
170 struct dhcp_packet packet;
172 struct iaddr requested_address;
177 struct interface_info {
178 struct hardware hw_address;
179 struct in_addr primary_address;
183 int ufdesc; /* unicast */
196 struct timeout *next;
201 #define _PATH_DHCLIENT_CONF "/etc/dhclient.conf"
202 #define _PATH_DHCLIENT_DB "/var/db/dhclient.leases"
203 #define _PATH_DHCLIENT_SCRIPT "/sbin/dhclient-script"
204 #define DHCPD_LOG_FACILITY LOG_DAEMON
206 /* External definitions... */
208 extern struct interface_info *ifi;
209 extern struct client_state *client;
210 extern struct client_config *config;
213 int cons_options(unsigned char *, const int, struct option_data *);
214 char *pretty_print_option(unsigned int, unsigned char *, int, int, int);
215 void do_packet(int, unsigned int, struct iaddr, struct hardware *);
218 extern int warnings_occurred;
219 void error(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
220 int warning(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
221 int note(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
223 int debug(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
225 int parse_warn(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
228 extern int lexline, lexchar;
229 extern char *token_line, *tlname;
230 void new_parse(char *);
231 int next_token(char **, FILE *);
232 int peek_token(char **, FILE *);
235 void skip_to_semi(FILE *);
236 int parse_semi(FILE *);
237 char *parse_string(FILE *);
238 int parse_ip_addr(FILE *, struct iaddr *);
239 void parse_hardware_param(FILE *, struct hardware *);
240 void parse_lease_time(FILE *, time_t *);
241 int parse_numeric_aggregate(FILE *, unsigned char *, int, int, int);
242 void convert_num(unsigned char *, char *, int, int);
243 time_t parse_date(FILE *);
246 int if_register_bpf(void);
247 void if_register_send(void);
248 void if_register_receive(void);
249 ssize_t send_packet(struct in_addr, struct sockaddr_in *, struct hardware *);
250 ssize_t receive_packet(struct sockaddr_in *, struct hardware *);
253 void discover_interface(void);
254 void reinitialize_interface(void);
257 void add_timeout(time_t, void (*)(void));
258 void cancel_timeout(void (*)(void));
259 int interface_status(char *);
260 int interface_link_status(char *);
261 int interface_link_forceup(char *);
264 extern const struct option dhcp_options[256];
267 u_int32_t getULong(unsigned char *);
268 int32_t getLong(unsigned char *);
269 u_int16_t getUShort(unsigned char *);
270 int16_t getShort(unsigned char *);
271 void putULong(unsigned char *, u_int32_t);
272 void putLong(unsigned char *, int32_t);
273 void putUShort(unsigned char *, unsigned int);
274 void putShort(unsigned char *, int);
277 struct iaddr subnet_number(struct iaddr, struct iaddr);
278 struct iaddr broadcast_addr(struct iaddr, struct iaddr);
279 int addr_eq(struct iaddr, struct iaddr);
280 char *piaddr(struct iaddr);
283 extern char *path_dhclient_conf;
284 extern char *path_dhclient_db;
285 extern time_t cur_time;
286 extern int log_perror;
289 void dhcpoffer(struct iaddr, struct option_data *);
290 void dhcpack(struct iaddr, struct option_data *);
291 void dhcpnak(struct iaddr, struct option_data *);
293 void send_discover(void);
294 void send_request(void);
295 void send_decline(void);
297 void state_reboot(void);
298 void state_init(void);
299 void state_selecting(void);
300 void state_bound(void);
301 void state_panic(void);
303 void bind_lease(void);
305 void make_discover(struct client_lease *);
306 void make_request(struct client_lease *);
307 void make_decline(struct client_lease *);
309 void free_client_lease(struct client_lease *);
310 void rewrite_client_leases(void);
311 void write_client_lease(struct client_lease *, int);
313 void priv_script_init(char *, char *);
314 void priv_script_write_params(char *, struct client_lease *);
315 int priv_script_go(void);
317 void script_init(char *, struct string_list *);
318 void script_write_params(char *, struct client_lease *);
320 void script_set_env(const char *, const char *, const char *);
321 void script_flush_env(void);
322 int dhcp_option_ev_name(char *, size_t, const struct option *);
324 struct client_lease *packet_to_lease(struct option_data *);
325 void go_daemon(void);
327 void routehandler(void);
330 void assemble_hw_header(unsigned char *, int *, struct hardware *);
331 void assemble_udp_ip_header(unsigned char *, int *, u_int32_t, u_int32_t,
332 unsigned int, unsigned char *, int);
333 ssize_t decode_hw_header(unsigned char *, int, struct hardware *);
334 ssize_t decode_udp_ip_header(unsigned char *, int, struct sockaddr_in *,
335 unsigned char *, int);
338 int read_client_conf(void);
339 void read_client_leases(void);
340 void parse_client_statement(FILE *);
341 int parse_X(FILE *, u_int8_t *, int);
342 int parse_option_list(FILE *, u_int8_t *);
343 void parse_interface_declaration(FILE *);
344 void parse_client_lease_statement(FILE *, int);
345 void parse_client_lease_declaration(FILE *, struct client_lease *);
346 int parse_option_decl(FILE *, struct option_data *);
347 void parse_string_list(FILE *, struct string_list **, int);
348 void parse_reject_statement(FILE *);