2 * pppd.h - PPP daemon global declarations.
4 * Copyright (c) 1989 Carnegie Mellon University.
7 * Redistribution and use in source and binary forms are permitted
8 * provided that the above copyright notice and this paragraph are
9 * duplicated in all such forms and that any documentation,
10 * advertising materials, and other materials related to such
11 * distribution and use acknowledge that the software was developed
12 * by Carnegie Mellon University. The name of the
13 * University may not be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 * $Id: pppd.h,v 1.31 1999/03/16 22:54:43 paulus Exp $
29 #include <stdio.h> /* for FILE */
30 #include <sys/param.h> /* for MAXPATHLEN and BSD4_4, if defined */
31 #include <sys/types.h> /* for u_int32_t, if defined */
32 #include <sys/time.h> /* for struct timeval */
33 #include <net/ppp_defs.h>
40 #define __V(x) (va_alist) va_dcl
48 #define NUM_PPP 1 /* One PPP interface supported (per process) */
49 #define MAXWORDLEN 1024 /* max length of word in file (incl null) */
50 #define MAXARGS 1 /* max # args to a command */
51 #define MAXNAMELEN 256 /* max length of hostname or name for auth */
52 #define MAXSECRETLEN 256 /* max length of password or secret */
55 * Option descriptor structure.
58 typedef unsigned char bool;
70 char *name; /* name of the option */
80 /* Values for flags */
81 #define OPT_VALUE 0xff /* mask for presupplied value */
82 #define OPT_HEX 0x100 /* int option is in hex */
83 #define OPT_NOARG 0x200 /* option doesn't take argument */
84 #define OPT_OR 0x400 /* OR in argument to value */
85 #define OPT_INC 0x800 /* increment value */
86 #define OPT_PRIV 0x1000 /* privileged option */
87 #define OPT_STATIC 0x2000 /* string option goes into static array */
88 #define OPT_LLIMIT 0x4000 /* check value against lower limit */
89 #define OPT_ULIMIT 0x8000 /* check value against upper limit */
90 #define OPT_LIMITS (OPT_LLIMIT|OPT_ULIMIT)
91 #define OPT_ZEROOK 0x10000 /* 0 value is OK even if not within limits */
92 #define OPT_NOINCR 0x20000 /* value mustn't be increased */
93 #define OPT_ZEROINF 0x40000 /* with OPT_NOINCR, 0 == infinity */
94 #define OPT_A2INFO 0x100000 /* addr2 -> option_info to update */
95 #define OPT_A2COPY 0x200000 /* addr2 -> second location to rcv value */
96 #define OPT_ENABLE 0x400000 /* use *addr2 as enable for option */
97 #define OPT_PRIVFIX 0x800000 /* can't be overridden if noauth */
99 #define OPT_VAL(x) ((x) & OPT_VALUE)
102 #define GIDSET_TYPE gid_t
109 extern int hungup; /* Physical layer has disconnected */
110 extern int ifunit; /* Interface unit number */
111 extern char ifname[]; /* Interface name */
112 extern int ttyfd; /* Serial device file descriptor */
113 extern char hostname[]; /* Our hostname */
114 extern u_char outpacket_buf[]; /* Buffer for outgoing packets */
115 extern int phase; /* Current state of link - see values below */
116 extern int baud_rate; /* Current link speed in bits/sec */
117 extern char *progname; /* Name of this program */
118 extern int redirect_stderr;/* Connector's stderr should go to file */
119 extern char peer_authname[];/* Authenticated name of peer */
120 extern int privileged; /* We were run by real-uid root */
121 extern int need_holdoff; /* Need holdoff period after link terminates */
122 extern char **script_env; /* Environment variables for scripts */
123 extern int detached; /* Have detached from controlling tty */
124 extern GIDSET_TYPE groups[NGROUPS_MAX]; /* groups the user is in */
125 extern int ngroups; /* How many groups valid in groups */
128 * Variables set by command-line options.
131 extern int debug; /* Debug flag */
132 extern int kdebugflag; /* Tell kernel to print debug messages */
133 extern int default_device; /* Using /dev/tty or equivalent */
134 extern char devnam[MAXPATHLEN]; /* Device name */
135 extern int crtscts; /* Use hardware flow control */
136 extern bool modem; /* Use modem control lines */
137 extern int inspeed; /* Input/Output speed requested */
138 extern u_int32_t netmask; /* IP netmask to set on interface */
139 extern bool lockflag; /* Create lock file to lock the serial dev */
140 extern bool nodetach; /* Don't detach from controlling tty */
141 extern bool updetach; /* Detach from controlling tty when link up */
142 extern char *connector; /* Script to establish physical link */
143 extern char *disconnector; /* Script to disestablish physical link */
144 extern char *welcomer; /* Script to welcome client after connection */
145 extern int maxconnect; /* Maximum connect time (seconds) */
146 extern char user[MAXNAMELEN];/* Our name for authenticating ourselves */
147 extern char passwd[MAXSECRETLEN]; /* Password for PAP */
148 extern bool auth_required; /* Peer is required to authenticate */
149 extern bool persist; /* Reopen link after it goes down */
150 extern bool uselogin; /* Use /etc/passwd for checking PAP */
151 extern char our_name[MAXNAMELEN];/* Our name for authentication purposes */
152 extern char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
153 extern int explicit_remote;/* remote_name specified with remotename opt */
154 extern bool demand; /* Do dial-on-demand */
155 extern char *ipparam; /* Extra parameter for ip up/down scripts */
156 extern bool cryptpap; /* Others' PAP passwords are encrypted */
157 extern int idle_time_limit;/* Shut down link if idle for this long */
158 extern int holdoff; /* Dead time before restarting */
161 extern struct bpf_program pass_filter; /* Filter for pkts to pass */
162 extern struct bpf_program active_filter; /* Filter for link-active pkts */
165 char *current_option; /* the name of the option being parsed */
166 int privileged_option; /* set iff the current option came from root */
167 char *option_source; /* string saying where the option came from */
170 extern bool ms_lanman; /* Use LanMan password instead of NT */
171 /* Has meaning only with MS-CHAP challenges */
178 #define PHASE_INITIALIZE 1
179 #define PHASE_DORMANT 2
180 #define PHASE_ESTABLISH 3
181 #define PHASE_AUTHENTICATE 4
182 #define PHASE_CALLBACK 5
183 #define PHASE_NETWORK 6
184 #define PHASE_TERMINATE 7
185 #define PHASE_HOLDOFF 8
188 * The following struct gives the addresses of procedures to call
189 * for a particular protocol.
192 u_short protocol; /* PPP protocol number */
193 /* Initialization procedure */
194 void (*init) __P((int unit));
195 /* Process a received packet */
196 void (*input) __P((int unit, u_char *pkt, int len));
197 /* Process a received protocol-reject */
198 void (*protrej) __P((int unit));
199 /* Lower layer has come up */
200 void (*lowerup) __P((int unit));
201 /* Lower layer has gone down */
202 void (*lowerdown) __P((int unit));
203 /* Open the protocol */
204 void (*open) __P((int unit));
205 /* Close the protocol */
206 void (*close) __P((int unit, char *reason));
207 /* Print a packet in readable form */
208 int (*printpkt) __P((u_char *pkt, int len,
209 void (*printer) __P((void *, char *, ...)),
211 /* Process a received data packet */
212 void (*datainput) __P((int unit, u_char *pkt, int len));
213 bool enabled_flag; /* 0 iff protocol is disabled */
214 char *name; /* Text name of protocol */
215 char *data_name; /* Text name of corresponding data protocol */
216 option_t *options; /* List of command-line options */
217 /* Check requested options, assign defaults */
218 void (*check_options) __P((void));
219 /* Configure interface for demand-dial */
220 int (*demand_conf) __P((int unit));
221 /* Say whether to bring up link for this pkt */
222 int (*active_pkt) __P((u_char *pkt, int len));
225 /* Table of pointers to supported protocols */
226 extern struct protent *protocols[];
232 /* Procedures exported from main.c. */
233 void detach __P((void)); /* Detach from controlling tty */
234 void die __P((int)); /* Cleanup and exit */
235 void quit __P((void)); /* like die(1) */
236 void novm __P((char *)); /* Say we ran out of memory, and die */
237 void timeout __P((void (*func)(void *), void *arg, int t));
238 /* Call func(arg) after t seconds */
239 void untimeout __P((void (*func)(void *), void *arg));
240 /* Cancel call to func(arg) */
241 pid_t run_program __P((char *prog, char **args, int must_exist,
242 void (*done)(void *), void *arg));
243 /* Run program prog with args in child */
244 void demuxprotrej __P((int, int));
245 /* Demultiplex a Protocol-Reject */
246 void format_packet __P((u_char *, int, void (*) (void *, char *, ...),
247 void *)); /* Format a packet in human-readable form */
248 void log_packet __P((u_char *, int, char *, int));
249 /* Format a packet and log it with syslog */
250 void print_string __P((char *, int, void (*) (void *, char *, ...),
251 void *)); /* Format a string for output */
252 int slprintf __P((char *, int, char *, ...)); /* sprintf++ */
253 int vslprintf __P((char *, int, char *, va_list)); /* vsprintf++ */
254 void script_setenv __P((char *, char *)); /* set script env var */
255 void script_unsetenv __P((char *)); /* unset script env var */
256 void hangup_modem __P((int)); /* Make modem hang up */
257 void strlcpy __P((char *, size_t, const char *)); /* safe strcpy */
258 void strlcat __P((char *, size_t, const char *)); /* safe strncpy */
259 void dbglog __P((char *, ...)); /* log a debug message */
260 void info __P((char *, ...)); /* log an informational message */
261 void notice __P((char *, ...)); /* log a notice-level message */
262 void warn __P((char *, ...)); /* log a warning message */
263 void error __P((char *, ...)); /* log an error message */
264 void fatal __P((char *, ...)); /* log an error message and die(1) */
266 /* Procedures exported from auth.c */
267 void link_required __P((int)); /* we are starting to use the link */
268 void link_terminated __P((int)); /* we are finished with the link */
269 void link_down __P((int)); /* the LCP layer has left the Opened state */
270 void link_established __P((int)); /* the link is up; authenticate now */
271 void np_up __P((int, int)); /* a network protocol has come up */
272 void np_down __P((int, int)); /* a network protocol has gone down */
273 void np_finished __P((int, int)); /* a network protocol no longer needs link */
274 void auth_peer_fail __P((int, int));
275 /* peer failed to authenticate itself */
276 void auth_peer_success __P((int, int, char *, int));
277 /* peer successfully authenticated itself */
278 void auth_withpeer_fail __P((int, int));
279 /* we failed to authenticate ourselves */
280 void auth_withpeer_success __P((int, int));
281 /* we successfully authenticated ourselves */
282 void auth_check_options __P((void));
283 /* check authentication options supplied */
284 void auth_reset __P((int)); /* check what secrets we have */
285 int check_passwd __P((int, char *, int, char *, int, char **, int *));
286 /* Check peer-supplied username/password */
287 int get_secret __P((int, char *, char *, char *, int *, int));
288 /* get "secret" for chap */
289 int auth_ip_addr __P((int, u_int32_t));
290 /* check if IP address is authorized */
291 int bad_ip_adrs __P((u_int32_t));
292 /* check if IP address is unreasonable */
293 void check_access __P((FILE *, char *));
294 /* check permissions on secrets file */
296 /* Procedures exported from demand.c */
297 void demand_conf __P((void)); /* config interface(s) for demand-dial */
298 void demand_block __P((void)); /* set all NPs to queue up packets */
299 void demand_unblock __P((void)); /* set all NPs to pass packets */
300 void demand_discard __P((void)); /* set all NPs to discard packets */
301 void demand_rexmit __P((int)); /* retransmit saved frames for an NP */
302 int loop_chars __P((unsigned char *, int)); /* process chars from loopback */
303 int loop_frame __P((unsigned char *, int)); /* process frame from loopback */
305 /* Procedures exported from sys-*.c */
306 void sys_init __P((void)); /* Do system-dependent initialization */
307 void sys_cleanup __P((void)); /* Restore system state before exiting */
308 int sys_check_options __P((void)); /* Check options specified */
309 void sys_close __P((void)); /* Clean up in a child before execing */
310 int ppp_available __P((void)); /* Test whether ppp kernel support exists */
311 int open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
312 int establish_ppp __P((int)); /* Turn serial port into a ppp interface */
313 void restore_loop __P((void)); /* Transfer ppp unit back to loopback */
314 void disestablish_ppp __P((int)); /* Restore port to normal operation */
315 void clean_check __P((void)); /* Check if line was 8-bit clean */
316 void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
317 void restore_tty __P((int)); /* Restore port's original parameters */
318 void setdtr __P((int, int)); /* Raise or lower port's DTR line */
319 void output __P((int, u_char *, int)); /* Output a PPP packet */
320 void wait_input __P((struct timeval *));
321 /* Wait for input, with timeout */
322 void add_fd __P((int)); /* Add fd to set to wait for */
323 void remove_fd __P((int)); /* Remove fd from set to wait for */
324 int read_packet __P((u_char *)); /* Read PPP packet */
325 int get_loop_output __P((void)); /* Read pkts from loopback */
326 void ppp_send_config __P((int, int, u_int32_t, int, int));
327 /* Configure i/f transmit parameters */
328 void ppp_set_xaccm __P((int, ext_accm));
329 /* Set extended transmit ACCM */
330 void ppp_recv_config __P((int, int, u_int32_t, int, int));
331 /* Configure i/f receive parameters */
332 int ccp_test __P((int, u_char *, int, int));
333 /* Test support for compression scheme */
334 void ccp_flags_set __P((int, int, int));
335 /* Set kernel CCP state */
336 int ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
337 int get_idle_time __P((int, struct ppp_idle *));
338 /* Find out how long link has been idle */
339 int sifvjcomp __P((int, int, int, int));
340 /* Configure VJ TCP header compression */
341 int sifup __P((int)); /* Configure i/f up (for IP) */
342 int sifnpmode __P((int u, int proto, enum NPmode mode));
343 /* Set mode for handling packets for proto */
344 int sifdown __P((int)); /* Configure i/f down (for IP) */
345 int sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
346 /* Configure IP addresses for i/f */
347 int cifaddr __P((int, u_int32_t, u_int32_t));
348 /* Reset i/f IP addresses */
349 int sifdefaultroute __P((int, u_int32_t, u_int32_t));
350 /* Create default route through i/f */
351 int cifdefaultroute __P((int, u_int32_t, u_int32_t));
352 /* Delete default route through i/f */
353 int sifproxyarp __P((int, u_int32_t));
354 /* Add proxy ARP entry for peer */
355 int cifproxyarp __P((int, u_int32_t));
356 /* Delete proxy ARP entry for peer */
357 u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
358 int lock __P((char *)); /* Create lock file for device */
359 void unlock __P((void)); /* Delete previously-created lock file */
360 int daemon __P((int, int)); /* Detach us from terminal session */
361 void logwtmp __P((const char *, const char *, const char *));
362 /* Write entry to wtmp file */
363 int get_host_seed __P((void)); /* Get host-dependent random number seed */
364 int have_route_to __P((u_int32_t)); /* Check if route to addr exists */
366 int set_filters __P((struct bpf_program *pass, struct bpf_program *active));
367 /* Set filter programs in kernel */
370 int sipxfaddr __P((int, unsigned long, unsigned char *));
371 int cipxfaddr __P((int));
374 /* Procedures exported from options.c */
375 int parse_args __P((int argc, char **argv));
376 /* Parse options from arguments given */
377 void usage __P((void)); /* Print a usage message */
378 int options_from_file __P((char *filename, int must_exist, int check_prot,
380 /* Parse options from an options file */
381 int options_from_user __P((void)); /* Parse options from user's .ppprc */
382 int options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
383 void scan_args __P((int argc, char **argv));
384 /* Look for tty name in command-line args */
385 int getword __P((FILE *f, char *word, int *newlinep, char *filename));
386 /* Read a word from a file */
387 void option_error __P((char *fmt, ...));
388 /* Print an error message about an option */
389 int readable __P((int fd)); /* Is fd readable by real user? */
390 int number_option __P((char *, u_int32_t *, int));
391 /* Parse a numerical option */
392 int int_option __P((char *, int *));
393 /* Simplified number_option for decimal ints */
396 * This structure is used to store information about certain
397 * options, such as where the option value came from (/etc/ppp/options,
398 * command line, etc.) and whether it came from a privileged source.
402 int priv; /* was value set by sysadmin? */
403 char *source; /* where option came from */
406 extern struct option_info devnam_info;
407 extern struct option_info connector_info;
408 extern struct option_info disconnector_info;
409 extern struct option_info welcomer_info;
412 * Inline versions of get/put char/short/long.
413 * Pointer is advanced; we assume that both arguments
414 * are lvalues and will already be in registers.
415 * cp MUST be u_char *.
417 #define GETCHAR(c, cp) { \
420 #define PUTCHAR(c, cp) { \
421 *(cp)++ = (u_char) (c); \
425 #define GETSHORT(s, cp) { \
426 (s) = *(cp)++ << 8; \
429 #define PUTSHORT(s, cp) { \
430 *(cp)++ = (u_char) ((s) >> 8); \
431 *(cp)++ = (u_char) (s); \
434 #define GETLONG(l, cp) { \
435 (l) = *(cp)++ << 8; \
436 (l) |= *(cp)++; (l) <<= 8; \
437 (l) |= *(cp)++; (l) <<= 8; \
440 #define PUTLONG(l, cp) { \
441 *(cp)++ = (u_char) ((l) >> 24); \
442 *(cp)++ = (u_char) ((l) >> 16); \
443 *(cp)++ = (u_char) ((l) >> 8); \
444 *(cp)++ = (u_char) (l); \
447 #define INCPTR(n, cp) ((cp) += (n))
448 #define DECPTR(n, cp) ((cp) -= (n))
456 * System dependent definitions for user-level 4.3BSD UNIX implementation.
459 #define DEMUXPROTREJ(u, p) demuxprotrej(u, p)
461 #define TIMEOUT(r, f, t) timeout((r), (f), (t))
462 #define UNTIMEOUT(r, f) untimeout((r), (f))
464 #define BCOPY(s, d, l) memcpy(d, s, l)
465 #define BZERO(s, n) memset(s, 0, n)
466 #define EXIT(u) quit()
468 #define PRINTMSG(m, l) { info("Remote message: %0.*v", l, m); }
471 * MAKEHEADER - Add Header fields to a packet.
473 #define MAKEHEADER(p, t) { \
474 PUTCHAR(PPP_ALLSTATIONS, p); \
475 PUTCHAR(PPP_UI, p); \
488 #ifndef LOG_PPP /* we use LOG_LOCAL2 for syslog by default */
489 #if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
490 || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
491 || defined(DEBUGCHAP) || defined(DEBUG)
492 #define LOG_PPP LOG_LOCAL2
494 #define LOG_PPP LOG_DAEMON
499 #define MAINDEBUG(x) if (debug) dbglog x
505 #define SYSDEBUG(x) if (debug) dbglog x
511 #define FSMDEBUG(x) if (debug) dbglog x
517 #define LCPDEBUG(x) if (debug) dbglog x
523 #define IPCPDEBUG(x) if (debug) dbglog x
529 #define UPAPDEBUG(x) if (debug) dbglog x
535 #define CHAPDEBUG(x) if (debug) dbglog x
541 #define IPXCPDEBUG(x) if (debug) dbglog x
543 #define IPXCPDEBUG(x)
547 #if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
551 #endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
555 #define MIN(a, b) ((a) < (b)? (a): (b))
558 #define MAX(a, b) ((a) > (b)? (a): (b))
561 #endif /* __PPP_H__ */