dhclient - Fix OpenBSD CVS ids to match current version.
[dragonfly.git] / sbin / dhclient / dhcpd.h
CommitLineData
5b2020b1 1/* $OpenBSD: src/sbin/dhclient/dhcpd.h,v 1.67 2008/05/26 03:11:48 deraadt Exp $ */
846204b6
HT
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#include <sys/socket.h>
43#include <sys/sockio.h>
44#include <sys/stat.h>
45#include <sys/time.h>
46#include <sys/types.h>
47#include <sys/wait.h>
48
49#include <arpa/inet.h>
50#include <net/if.h>
51#include <net/if_dl.h>
52#include <net/route.h>
53#include <netinet/in.h>
54
55#include <ctype.h>
56#include <errno.h>
57#include <fcntl.h>
58#include <limits.h>
59#include <netdb.h>
60#include <paths.h>
61#include <stdarg.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <string.h>
65#include <syslog.h>
66#include <time.h>
67#include <unistd.h>
68
69#include "dhcp.h"
70
71#define LOCAL_PORT 68
72#define REMOTE_PORT 67
73
74struct option {
75 char *name;
76 char *format;
77};
78
79struct option_data {
80 unsigned int len;
81 u_int8_t *data;
82};
83
84struct string_list {
85 struct string_list *next;
86 char string[1]; /* Actually bigger. */
87};
88
89struct iaddr {
90 int len;
91 unsigned char iabuf[16];
92};
93
94struct iaddrlist {
95 struct iaddrlist *next;
96 struct iaddr addr;
97};
98
99struct hardware {
100 u_int8_t htype;
101 u_int8_t hlen;
102 u_int8_t haddr[16];
103};
104
105struct client_lease {
106 struct client_lease *next;
107 time_t expiry, renewal, rebind;
108 struct iaddr address;
109 char *server_name;
110 char *filename;
111 struct string_list *medium;
112 unsigned int is_static : 1;
113 unsigned int is_bootp : 1;
114 struct option_data options[256];
115};
116
117/* Possible states in which the client can be. */
118enum dhcp_state {
119 S_REBOOTING,
120 S_INIT,
121 S_SELECTING,
122 S_REQUESTING,
123 S_BOUND,
124 S_RENEWING,
125 S_REBINDING
126};
127
128struct client_config {
129 struct option_data defaults[256];
130 enum {
131 ACTION_DEFAULT,
132 ACTION_SUPERSEDE,
133 ACTION_PREPEND,
134 ACTION_APPEND
135 } default_actions[256];
136
137 struct option_data send_options[256];
138 u_int8_t required_options[256];
139 u_int8_t requested_options[256];
140 int requested_option_count;
141 time_t timeout;
142 time_t initial_interval;
143 time_t link_timeout;
144 time_t retry_interval;
145 time_t select_interval;
146 time_t reboot_timeout;
147 time_t backoff_cutoff;
148 struct string_list *media;
149 char *script_name;
150 enum { IGNORE, ACCEPT, PREFER }
151 bootp_policy;
152 struct string_list *medium;
153 struct iaddrlist *reject_list;
154};
155
156struct client_state {
157 struct client_lease *active;
158 struct client_lease *new;
159 struct client_lease *offered_leases;
160 struct client_lease *leases;
161 struct client_lease *alias;
162 enum dhcp_state state;
163 struct iaddr destination;
164 u_int32_t xid;
165 u_int16_t secs;
166 time_t first_sending;
167 time_t interval;
168 struct string_list *medium;
169 struct dhcp_packet packet;
170 int packet_length;
171 struct iaddr requested_address;
172 char **scriptEnv;
173 int scriptEnvsize;
174};
175
176struct interface_info {
177 struct hardware hw_address;
178 struct in_addr primary_address;
179 char name[IFNAMSIZ];
180 int rfdesc;
181 int wfdesc;
182 int ufdesc; /* unicast */
183 unsigned char *rbuf;
184 size_t rbuf_max;
185 size_t rbuf_offset;
186 size_t rbuf_len;
187 struct ifreq *ifp;
188 int noifmedia;
189 int errors;
190 u_int16_t index;
191 int linkstat;
192};
193
194struct timeout {
195 struct timeout *next;
196 time_t when;
197 void (*func)(void);
198};
199
200#define _PATH_DHCLIENT_CONF "/etc/dhclient.conf"
201#define _PATH_DHCLIENT_DB "/var/db/dhclient.leases"
202#define _PATH_DHCLIENT_SCRIPT "/sbin/dhclient-script"
203#define DHCPD_LOG_FACILITY LOG_DAEMON
204
205/* External definitions... */
206
207extern struct interface_info *ifi;
208extern struct client_state *client;
209extern struct client_config *config;
210
211/* options.c */
212int cons_options(unsigned char *, const int, struct option_data *);
213char *pretty_print_option(unsigned int, unsigned char *, int, int, int);
214void do_packet(int, unsigned int, struct iaddr, struct hardware *);
215
216/* errwarn.c */
217extern int warnings_occurred;
218void error(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
219int warning(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
220int note(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
221int debug(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
222int parse_warn(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
223
224/* conflex.c */
225extern int lexline, lexchar;
226extern char *token_line, *tlname;
227void new_parse(char *);
228int next_token(char **, FILE *);
229int peek_token(char **, FILE *);
230
231/* parse.c */
232void skip_to_semi(FILE *);
233int parse_semi(FILE *);
234char *parse_string(FILE *);
235int parse_ip_addr(FILE *, struct iaddr *);
236void parse_hardware_param(FILE *, struct hardware *);
237void parse_lease_time(FILE *, time_t *);
238int parse_numeric_aggregate(FILE *, unsigned char *, int, int, int);
239void convert_num(unsigned char *, char *, int, int);
240time_t parse_date(FILE *);
241
242/* bpf.c */
243int if_register_bpf(void);
244void if_register_send(void);
245void if_register_receive(void);
246ssize_t send_packet(struct in_addr, struct sockaddr_in *, struct hardware *);
247ssize_t receive_packet(struct sockaddr_in *, struct hardware *);
248
249/* dispatch.c */
250void discover_interface(void);
251void reinitialize_interface(void);
252void dispatch(void);
253void got_one(void);
254void add_timeout(time_t, void (*)(void));
255void cancel_timeout(void (*)(void));
256int interface_status(char *);
257int interface_link_status(char *);
258int interface_link_forceup(char *);
259void interface_link_forcedown(char *);
260
261/* tables.c */
262extern const struct option dhcp_options[256];
263
264/* convert.c */
265u_int32_t getULong(unsigned char *);
266int32_t getLong(unsigned char *);
267u_int16_t getUShort(unsigned char *);
268int16_t getShort(unsigned char *);
269void putULong(unsigned char *, u_int32_t);
270void putLong(unsigned char *, int32_t);
271void putUShort(unsigned char *, unsigned int);
272void putShort(unsigned char *, int);
273
274/* inet.c */
275struct iaddr subnet_number(struct iaddr, struct iaddr);
276struct iaddr broadcast_addr(struct iaddr, struct iaddr);
277int addr_eq(struct iaddr, struct iaddr);
278char *piaddr(struct iaddr);
279
280/* dhclient.c */
281extern char *path_dhclient_conf;
282extern char *path_dhclient_db;
283extern time_t cur_time;
284extern int log_perror;
285extern int routefd;
286
287void dhcpoffer(struct iaddr, struct option_data *);
288void dhcpack(struct iaddr, struct option_data *);
289void dhcpnak(struct iaddr, struct option_data *);
290
291void send_discover(void);
292void send_request(void);
293void send_decline(void);
294
295void state_reboot(void);
296void state_init(void);
297void state_selecting(void);
298void state_bound(void);
299void state_panic(void);
300
301void bind_lease(void);
302
303void make_discover(struct client_lease *);
304void make_request(struct client_lease *);
305void make_decline(struct client_lease *);
306
307void free_client_lease(struct client_lease *);
308void rewrite_client_leases(void);
309void write_client_lease(struct client_lease *, int);
310
311void priv_script_init(char *, char *);
312void priv_script_write_params(char *, struct client_lease *);
313int priv_script_go(void);
314
315void script_init(char *, struct string_list *);
316void script_write_params(char *, struct client_lease *);
317int script_go(void);
318void script_set_env(const char *, const char *, const char *);
319void script_flush_env(void);
320int dhcp_option_ev_name(char *, size_t, const struct option *);
321
322struct client_lease *packet_to_lease(struct option_data *);
323void go_daemon(void);
324
325void routehandler(void);
326
327/* packet.c */
328void assemble_hw_header(unsigned char *, int *, struct hardware *);
329void assemble_udp_ip_header(unsigned char *, int *, u_int32_t, u_int32_t,
330 unsigned int, unsigned char *, int);
331ssize_t decode_hw_header(unsigned char *, int, struct hardware *);
332ssize_t decode_udp_ip_header(unsigned char *, int, struct sockaddr_in *,
333 unsigned char *, int);
334
335/* clparse.c */
336int read_client_conf(void);
337void read_client_leases(void);
338void parse_client_statement(FILE *);
339int parse_X(FILE *, u_int8_t *, int);
340int parse_option_list(FILE *, u_int8_t *);
341void parse_interface_declaration(FILE *);
342void parse_client_lease_statement(FILE *, int);
343void parse_client_lease_declaration(FILE *, struct client_lease *);
344int parse_option_decl(FILE *, struct option_data *);
345void parse_string_list(FILE *, struct string_list **, int);
346void parse_reject_statement(FILE *);