summaryrefslogtreecommitdiffstats
path: root/cpukit/pppd/pppd.h
blob: 0ecd2e1d235b58aeaab11010457952a03dd317bc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
/*
 * pppd.h - PPP daemon global declarations.
 *
 * Copyright (c) 1989 Carnegie Mellon University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Carnegie Mellon University.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * $Id$
 */

#ifndef __PPPD_H__
#define __PPPD_H__

#include <stdio.h>		/* for FILE */
#include <limits.h>		/* for NGROUPS_MAX */
#include <sys/param.h>		/* for MAXPATHLEN and BSD4_4, if defined */
#include <sys/types.h>		/* for u_int32_t, if defined */
#include <sys/time.h>		/* for struct timeval */
#include <net/ppp_defs.h>
#include "rtemsdialer.h"

#if defined(__STDC__)
#include <stdarg.h>
#define __V(x)	x
#else
#include <varargs.h>
#define __V(x)	(va_alist) va_dcl
#define const
#define volatile
#endif

#ifdef INET6
#include "eui64.h"
#endif

/*
 * Limits.
 */

#define NUM_PPP		1	/* One PPP interface supported (per process) */
#define MAXWORDLEN	1024	/* max length of word in file (incl null) */
#define MAXARGS		1	/* max # args to a command */
#define MAXNAMELEN	256	/* max length of hostname or name for auth */
#define MAXSECRETLEN	256	/* max length of password or secret */

/*
 * Option descriptor structure.
 */

typedef unsigned char	bool;

enum opt_type {
	o_special_noarg = 0,
	o_special = 1,
	o_bool,
	o_int,
	o_uint32,
	o_string,
};

typedef struct {
	char	*name;		/* name of the option */
	enum opt_type type;
	void	*addr;
	char	*description;
	int	flags;
	void	*addr2;
	int	upper_limit;
	int	lower_limit;
} option_t;

/* Values for flags */
#define OPT_VALUE	0xff	/* mask for presupplied value */
#define OPT_HEX		0x100	/* int option is in hex */
#define OPT_NOARG	0x200	/* option doesn't take argument */
#define OPT_OR		0x400	/* OR in argument to value */
#define OPT_INC		0x800	/* increment value */
#define OPT_PRIV	0x1000	/* privileged option */
#define OPT_STATIC	0x2000	/* string option goes into static array */
#define OPT_LLIMIT	0x4000	/* check value against lower limit */
#define OPT_ULIMIT	0x8000	/* check value against upper limit */
#define OPT_LIMITS	(OPT_LLIMIT|OPT_ULIMIT)
#define OPT_ZEROOK	0x10000	/* 0 value is OK even if not within limits */
#define OPT_NOINCR	0x20000	/* value mustn't be increased */
#define OPT_ZEROINF	0x40000	/* with OPT_NOINCR, 0 == infinity */
#define OPT_A2INFO	0x100000 /* addr2 -> option_info to update */
#define OPT_A2COPY	0x200000 /* addr2 -> second location to rcv value */
#define OPT_ENABLE	0x400000 /* use *addr2 as enable for option */
#define OPT_PRIVFIX	0x800000 /* can't be overridden if noauth */
#define OPT_PREPASS	0x1000000 /* do this opt in pre-pass to find device */
#define OPT_INITONLY	0x2000000 /* option can only be set in init phase */
#define OPT_DEVEQUIV	0x4000000 /* equiv to device name */
#define OPT_DEVNAM	(OPT_PREPASS | OPT_INITONLY | OPT_DEVEQUIV)

#define OPT_VAL(x)	((x) & OPT_VALUE)

#ifndef GIDSET_TYPE
#define GIDSET_TYPE	gid_t
#endif

/* Structure representing a list of permitted IP addresses. */
struct permitted_ip {
    int		permit;		/* 1 = permit, 0 = forbid */
    u_int32_t	base;		/* match if (addr & mask) == base */
    u_int32_t	mask;		/* base and mask are in network byte order */
};

/*
 * Unfortunately, the linux kernel driver uses a different structure
 * for statistics from the rest of the ports.
 * This structure serves as a common representation for the bits
 * pppd needs.
 */
struct pppd_stats {
    unsigned int	bytes_in;
    unsigned int	bytes_out;
};

/* Used for storing a sequence of words.  Usually malloced. */
struct wordlist {
    struct wordlist	*next;
    char		*word;
};

/*
 * Global variables.
 */

extern int	pppd_kill_link;	/* Signal to terminate processing loop */
extern int	hungup;		/* Physical layer has disconnected */
extern int	pppifunit;	/* Interface unit number */
extern char	ifname[];	/* Interface name */
extern int	ttyfd;		/* Serial device file descriptor */
extern char	hostname[];	/* Our hostname */
extern u_char	outpacket_buf[]; /* Buffer for outgoing packets */
extern int	pppd_phase;		/* Current state of link - see values below */
extern int	baud_rate;	/* Current link speed in bits/sec */
extern int	redirect_stderr;/* Connector's stderr should go to file */
extern char	peer_authname[];/* Authenticated name of peer */
extern int	privileged;	/* We were run by real-uid root */
extern int	need_holdoff;	/* Need holdoff period after link terminates */
extern char	**script_env;	/* Environment variables for scripts */
extern int	detached;	/* Have detached from controlling tty */
extern GIDSET_TYPE groups[NGROUPS_MAX];	/* groups the user is in */
extern int	ngroups;	/* How many groups valid in groups */
extern struct pppd_stats link_stats; /* byte/packet counts etc. for link */
extern int	using_pty;	/* using pty as device (notty or pty opt.) */
extern int	log_to_fd;	/* logging to this fd as well as syslog */
extern char	*no_ppp_msg;	/* message to print if ppp not in kernel */
extern volatile int pppd_status;	/* exit status for pppd */
extern int	devnam_fixed;	/* can no longer change devnam */
extern int	unsuccess;	/* # unsuccessful connection attempts */
extern int	do_callback;	/* set if we want to do callback next */
extern int	doing_callback;	/* set if this is a callback */
extern dialerfp pppd_dialer;    /* script dialer function callback */

/* Values for do_callback and doing_callback */
#define CALLBACK_DIALIN		1	/* we are expecting the call back */
#define CALLBACK_DIALOUT	2	/* we are dialling out to call back */

/*
 * Variables set by command-line options.
 */

extern int	debug;		/* Debug flag */
extern int	kdebugflag;	/* Tell kernel to print debug messages */
extern int	default_device;	/* Using /dev/tty or equivalent */
extern char	devnam[MAXPATHLEN];	/* Device name */
extern int	crtscts;	/* Use hardware flow control */
extern bool	modem;		/* Use modem control lines */
extern int	inspeed;	/* Input/Output speed requested */
extern u_int32_t netmask;	/* IP netmask to set on interface */
extern bool	lockflag;	/* Create lock file to lock the serial dev */
extern bool	nodetach;	/* Don't detach from controlling tty */
extern bool	updetach;	/* Detach from controlling tty when link up */
extern char	*initializer;	/* Script to initialize physical link */
extern char	*connect_script; /* Script to establish physical link */
extern char	*disconnect_script; /* Script to disestablish physical link */
extern char	*welcomer;	/* Script to welcome client after connection */
extern char	*ptycommand;	/* Command to run on other side of pty */
extern int	maxconnect;	/* Maximum connect time (seconds) */
extern char	user[MAXNAMELEN];/* Our name for authenticating ourselves */
extern char	passwd[MAXSECRETLEN];	/* Password for PAP or CHAP */
extern bool	auth_required;	/* Peer is required to authenticate */
extern bool	persist;	/* Reopen link after it goes down */
extern bool	uselogin;	/* Use /etc/passwd for checking PAP */
extern char	our_name[MAXNAMELEN];/* Our name for authentication purposes */
extern char	remote_name[MAXNAMELEN]; /* Peer's name for authentication */
extern bool	explicit_remote;/* remote_name specified with remotename opt */
extern bool	demand;		/* Do dial-on-demand */
extern char	*ipparam;	/* Extra parameter for ip up/down scripts */
extern bool	cryptpap;	/* Others' PAP passwords are encrypted */
extern int	idle_time_limit;/* Shut down link if idle for this long */
extern int	holdoff;	/* Dead time before restarting */
extern bool	holdoff_specified; /* true if user gave a holdoff value */
extern bool	notty;		/* Stdin/out is not a tty */
extern char	*record_file;	/* File to record chars sent/received */
extern bool	sync_serial;	/* Device is synchronous serial device */
extern int	maxfail;	/* Max # of unsuccessful connection attempts */
extern char	linkname[MAXPATHLEN]; /* logical name for link */
extern bool	tune_kernel;	/* May alter kernel settings as necessary */
extern int	connect_delay;	/* Time to delay after connect script */

#ifdef PPP_FILTER
extern struct	bpf_program pass_filter;   /* Filter for pkts to pass */
extern struct	bpf_program active_filter; /* Filter for link-active pkts */
#endif

#ifdef MSLANMAN
extern bool	ms_lanman;	/* Use LanMan password instead of NT */
				/* Has meaning only with MS-CHAP challenges */
#endif

extern char *current_option;	/* the name of the option being parsed */
extern int  privileged_option;	/* set iff the current option came from root */
extern char *option_source;	/* string saying where the option came from */

/*
 * Values for phase.
 */
#define PHASE_DEAD		0
#define PHASE_INITIALIZE	1
#define PHASE_SERIALCONN	2
#define PHASE_DORMANT		3
#define PHASE_ESTABLISH		4
#define PHASE_AUTHENTICATE	5
#define PHASE_CALLBACK		6
#define PHASE_NETWORK		7
#define PHASE_RUNNING		8
#define PHASE_TERMINATE		9
#define PHASE_DISCONNECT	10
#define PHASE_HOLDOFF		11

/*
 * The following struct gives the addresses of procedures to call
 * for a particular protocol.
 */
struct protent {
    u_short protocol;		/* PPP protocol number */
    /* Initialization procedure */
    void (*init) __P((int unit));
    /* Process a received packet */
    void (*input) __P((int unit, u_char *pkt, int len));
    /* Process a received protocol-reject */
    void (*protrej) __P((int unit));
    /* Lower layer has come up */
    void (*lowerup) __P((int unit));
    /* Lower layer has gone down */
    void (*lowerdown) __P((int unit));
    /* Open the protocol */
    void (*open) __P((int unit));
    /* Close the protocol */
    void (*close) __P((int unit, char *reason));
    /* Print a packet in readable form */
    int  (*printpkt) __P((u_char *pkt, int len,
			  void (*printer) __P((void *, char *, ...)),
			  void *arg));
    /* Process a received data packet */
    void (*datainput) __P((int unit, u_char *pkt, int len));
    bool enabled_flag;		/* 0 iff protocol is disabled */
    char *name;			/* Text name of protocol */
    char *data_name;		/* Text name of corresponding data protocol */
    option_t *options;		/* List of command-line options */
    /* Check requested options, assign defaults */
    void (*check_options) __P((void));
    /* Configure interface for demand-dial */
    int  (*demand_conf) __P((int unit));
    /* Say whether to bring up link for this pkt */
    int  (*active_pkt) __P((u_char *pkt, int len));
};

/* Table of pointers to supported protocols */
extern struct protent *protocols[];

/*
 * Prototypes.
 */

/* Procedures exported from main.c. */
void die __P((int));		/* Cleanup and exit */
void quit __P((void));		/* like die(1) */
void novm __P((char *));	/* Say we ran out of memory, and die */
void ppptimeout __P((void (*func)(void *), void *arg, int t));
				/* Call func(arg) after t seconds */
void untimeout __P((void (*func)(void *), void *arg));
				/* Cancel call to func(arg) */
void update_link_stats __P((int)); /* Get stats at link termination */
void new_phase __P((int));	/* signal start of new phase */

/* Procedures exported from utils.c. */
void log_packet __P((u_char *, int, char *, int));
				/* Format a packet and log it with syslog */
void print_string __P((char *, int,  void (*) (void *, char *, ...),
		void *));	/* Format a string for output */
int slprintf __P((char *, int, char *, ...));		/* sprintf++ */
int vslprintf __P((char *, int, char *, va_list));	/* vsprintf++ */
size_t strlcpy __P((char *, const char *, size_t));	/* safe strcpy */
size_t strlcat __P((char *, const char *, size_t));	/* safe strncpy */
void pppd_dbglog __P((char *, ...));	/* log a debug message */
void pppd_info __P((char *, ...));	/* log an informational message */
void pppd_notice __P((char *, ...));	/* log a notice-level message */
void pppd_warn __P((char *, ...));	/* log a warning message */
void pppd_error __P((char *, ...));	/* log an error message */
void pppd_fatal __P((char *, ...));	/* log an error message and die(1) */

#define dbglog pppd_dbglog
#define info   pppd_info
#define notice pppd_notice
#define warn   pppd_warn
#define error  pppd_error
#define fatal  pppd_fatal

/* Procedures exported from auth.c */
void link_required __P((int));	  /* we are starting to use the link */
void link_terminated __P((int));  /* we are finished with the link */
void link_down __P((int));	  /* the LCP layer has left the Opened state */
void link_established __P((int)); /* the link is up; authenticate now */
void start_networks __P((void));  /* start all the network control protos */
void np_up __P((int, int));	  /* a network protocol has come up */
void np_down __P((int, int));	  /* a network protocol has gone down */
void np_finished __P((int, int)); /* a network protocol no longer needs link */
void auth_peer_fail __P((int, int));
				/* peer failed to authenticate itself */
void auth_peer_success __P((int, int, char *, int));
				/* peer successfully authenticated itself */
void auth_withpeer_fail __P((int, int));
				/* we failed to authenticate ourselves */
void auth_withpeer_success __P((int, int));
				/* we successfully authenticated ourselves */
int  auth_check_options __P((void));
				/* check authentication options supplied */
void auth_reset __P((int));	/* check what secrets we have */
int  check_passwd __P((int, char *, int, char *, int, char **));
				/* Check peer-supplied username/password */
int  get_secret __P((int, char *, char *, char *, int *, int));
				/* get "secret" for chap */
int  auth_ip_addr __P((int, u_int32_t));
				/* check if IP address is authorized */
int  bad_ip_adrs __P((u_int32_t));
				/* check if IP address is unreasonable */

/* Procedures exported from demand.c */
void demand_conf __P((void));	/* config interface(s) for demand-dial */
void demand_block __P((void));	/* set all NPs to queue up packets */
void demand_unblock __P((void)); /* set all NPs to pass packets */
void demand_discard __P((void)); /* set all NPs to discard packets */
void demand_rexmit __P((int));	/* retransmit saved frames for an NP */
int  loop_chars __P((unsigned char *, int)); /* process chars from loopback */
int  loop_frame __P((unsigned char *, int)); /* should we bring link up? */

/* Procedures exported from sys-*.c */
void sys_init __P((void));	/* Do system-dependent initialization */
void sys_cleanup __P((void));	/* Restore system state before exiting */
int  sys_check_options __P((void)); /* Check options specified */
void sys_close __P((void));	/* Clean up in a child before execing */
int  ppp_available __P((void));	/* Test whether ppp kernel support exists */
int  get_pty __P((int *, int *, char *, int));	/* Get pty master/slave */
int  open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
int  establish_ppp __P((int));	/* Turn serial port into a ppp interface */
void restore_loop __P((void));	/* Transfer ppp unit back to loopback */
void disestablish_ppp __P((int)); /* Restore port to normal operation */
void clean_check __P((void));	/* Check if line was 8-bit clean */
void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
void restore_tty __P((int));	/* Restore port's original parameters */
void setdtr __P((int, int));	/* Raise or lower port's DTR line */
void output __P((int, u_char *, int)); /* Output a PPP packet */
void wait_input __P((struct timeval *)); /* Wait for input, with timeout */

void ppp_delay __P((void));       /* delay task for a little while */
int  read_packet __P((u_char *)); /* Read PPP packet */
int  get_loop_output __P((void)); /* Read pkts from loopback */
void ppp_send_config __P((int, int, u_int32_t, int, int));
				/* Configure i/f transmit parameters */
void ppp_set_xaccm __P((int, ext_accm));
				/* Set extended transmit ACCM */
void ppp_recv_config __P((int, int, u_int32_t, int, int));
				/* Configure i/f receive parameters */
int  ccp_test __P((int, u_char *, int, int));
				/* Test support for compression scheme */
void ccp_flags_set __P((int, int, int));
				/* Set kernel CCP state */
int  ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
int  get_idle_time __P((int, struct ppp_idle *));
				/* Find out how long link has been idle */
int  get_ppp_stats __P((int, struct pppd_stats *));
				/* Return link statistics */
int  sifvjcomp __P((int, int, int, int));
				/* Configure VJ TCP header compression */
int  sifup __P((int));		/* Configure i/f up for one protocol */
int  sifnpmode __P((int u, int proto, enum NPmode mode));
				/* Set mode for handling packets for proto */
int  sifdown __P((int));	/* Configure i/f down for one protocol */
int  sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
				/* Configure IPv4 addresses for i/f */
int  cifaddr __P((int, u_int32_t, u_int32_t));
				/* Reset i/f IP addresses */
#ifdef INET6
int  sif6addr __P((int, eui64_t, eui64_t));
				/* Configure IPv6 addresses for i/f */
int  cif6addr __P((int, eui64_t, eui64_t));
				/* Remove an IPv6 address from i/f */
#endif
int  sifdefaultroute __P((int, u_int32_t, u_int32_t));
				/* Create default route through i/f */
int  cifdefaultroute __P((int, u_int32_t, u_int32_t));
				/* Delete default route through i/f */
int  sifproxyarp __P((int, u_int32_t));
				/* Add proxy ARP entry for peer */
int  cifproxyarp __P((int, u_int32_t));
				/* Delete proxy ARP entry for peer */
u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
int  lock __P((char *));	/* Create lock file for device */
int  relock __P((int));		/* Rewrite lock file with new pid */
void unlock __P((void));	/* Delete previously-created lock file */
void logwtmp __P((const char *, const char *, const char *));
				/* Write entry to wtmp file */
int  get_host_seed __P((void));	/* Get host-dependent random number seed */
int  have_route_to __P((u_int32_t)); /* Check if route to addr exists */
#ifdef PPP_FILTER
int  set_filters __P((struct bpf_program *pass, struct bpf_program *active));
				/* Set filter programs in kernel */
#endif
#ifdef IPX_CHANGE
int  sipxfaddr __P((int, unsigned long, unsigned char *));
int  cipxfaddr __P((int));
#endif

/* Procedures exported from options.c */
int  parse_args __P((int argc, char **argv));
				/* Parse options from arguments given */
int  options_from_file __P((char *filename, int must_exist, int check_prot,
			    int privileged));
				/* Parse options from an options file */
int  options_from_user __P((void)); /* Parse options from user's .ppprc */
int  options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
int  options_from_list __P((struct wordlist *, int privileged));
				/* Parse options from a wordlist */
int  getword __P((FILE *f, char *word, int *newlinep, char *filename));
				/* Read a word from a file */
void option_error __P((char *fmt, ...));
				/* Print an error message about an option */
int int_option __P((char *, int *));
				/* Simplified number_option for decimal ints */
void add_options __P((option_t *)); /* Add extra options */

/*
 * This structure is used to store information about certain
 * options, such as where the option value came from (/etc/ppp/options,
 * command line, etc.) and whether it came from a privileged source.
 */

struct option_info {
    int	    priv;		/* was value set by sysadmin? */
    char    *source;		/* where option came from */
};

extern struct option_info devnam_info;
extern struct option_info initializer_info;
extern struct option_info connect_script_info;
extern struct option_info disconnect_script_info;
extern struct option_info welcomer_info;
extern struct option_info ptycommand_info;

/*
 * Hooks to enable plugins to change various things.
 */
extern int (*new_phase_hook) __P((int));
extern int (*idle_time_hook) __P((struct ppp_idle *));
extern int (*holdoff_hook) __P((void));
extern int (*pap_check_hook) __P((void));
extern int (*pap_auth_hook) __P((char *user, char *passwd/*, char **msgp,
				 struct wordlist **paddrs,
				 struct wordlist **popts*/));
extern void (*pap_logout_hook) __P((void));
extern int (*pap_passwd_hook) __P((char *user, char *passwd));
extern void (*ip_up_hook) __P((void));
extern void (*ip_down_hook) __P((void));
extern void (*auth_linkup_hook) __P((void));
extern void (*auth_linkdown_hook) __P((void));

/*
 * Inline versions of get/put char/short/long.
 * Pointer is advanced; we assume that both arguments
 * are lvalues and will already be in registers.
 * cp MUST be u_char *.
 */
#define GETCHAR(c, cp) { \
	(c) = *(cp)++; \
}
#define PUTCHAR(c, cp) { \
	*(cp)++ = (u_char) (c); \
}


#define GETSHORT(s, cp) { \
	(s) = *(cp)++ << 8; \
	(s) |= *(cp)++; \
}
#define PUTSHORT(s, cp) { \
	*(cp)++ = (u_char) ((s) >> 8); \
	*(cp)++ = (u_char) (s); \
}

#define GETLONG(l, cp) { \
	(l) = *(cp)++ << 8; \
	(l) |= *(cp)++; (l) <<= 8; \
	(l) |= *(cp)++; (l) <<= 8; \
	(l) |= *(cp)++; \
}
#define PUTLONG(l, cp) { \
	*(cp)++ = (u_char) ((l) >> 24); \
	*(cp)++ = (u_char) ((l) >> 16); \
	*(cp)++ = (u_char) ((l) >> 8); \
	*(cp)++ = (u_char) (l); \
}

#define INCPTR(n, cp)	((cp) += (n))
#define DECPTR(n, cp)	((cp) -= (n))

/*
 * System dependent definitions for user-level 4.3BSD UNIX implementation.
 */

#define TIMEOUT(r, f, t)	ppptimeout((r), (f), (t))
#define UNTIMEOUT(r, f)		untimeout((r), (f))

#define BCOPY(s, d, l)		memcpy(d, s, l)
#define BZERO(s, n)		memset(s, 0, n)

#define PRINTMSG(m, l)		{ info("Remote message: %0.*v", l, m); }

/*
 * MAKEHEADER - Add Header fields to a packet.
 */
#define MAKEHEADER(p, t) { \
    PUTCHAR(PPP_ALLSTATIONS, p); \
    PUTCHAR(PPP_UI, p); \
    PUTSHORT(t, p); }

/*
 * Exit status values.
 */
#define EXIT_OK			0
#define EXIT_FATAL_ERROR	1
#define EXIT_OPTION_ERROR	2
#define EXIT_NOT_ROOT		3
#define EXIT_NO_KERNEL_SUPPORT	4
#define EXIT_USER_REQUEST	5
#define EXIT_LOCK_FAILED	6
#define EXIT_OPEN_FAILED	7
#define EXIT_CONNECT_FAILED	8
#define EXIT_PTYCMD_FAILED	9
#define EXIT_NEGOTIATION_FAILED	10
#define EXIT_PEER_AUTH_FAILED	11
#define EXIT_IDLE_TIMEOUT	12
#define EXIT_CONNECT_TIME	13
#define EXIT_CALLBACK		14
#define EXIT_PEER_DEAD		15
#define EXIT_HANGUP		16
#define EXIT_LOOPBACK		17
#define EXIT_INIT_FAILED	18
#define EXIT_AUTH_TOPEER_FAILED	19

/*
 * Debug macros.  Slightly useful for finding bugs in pppd, not particularly
 * useful for finding out why your connection isn't being established.
 */

#ifdef DEBUGALL
#define DEBUGMAIN	1
#define DEBUGFSM	1
#define DEBUGLCP	1
#define DEBUGIPCP	1
#define DEBUGIPV6CP	1
#define DEBUGUPAP	1
#define DEBUGCHAP	1
#endif
#define DEBUGMAIN	1
#define DEBUGUPAP	1
#define DEBUGCHAP	1


#ifdef DEBUGMAIN
#define MAINDEBUG(x)	if (debug) dbglog x
#else
#define MAINDEBUG(x)
#endif

#ifdef DEBUGSYS
#define SYSDEBUG(x)	if (debug) dbglog x
#else
#define SYSDEBUG(x)
#endif

#ifdef DEBUGFSM
#define FSMDEBUG(x)	if (debug) dbglog x
#else
#define FSMDEBUG(x)
#endif

#ifdef DEBUGLCP
#define LCPDEBUG(x)	if (debug) dbglog x
#else
#define LCPDEBUG(x)
#endif

#ifdef DEBUGIPCP
#define IPCPDEBUG(x)	if (debug) dbglog x
#else
#define IPCPDEBUG(x)
#endif

#ifdef DEBUGIPV6CP
#define IPV6CPDEBUG(x)  if (debug) dbglog x
#else
#define IPV6CPDEBUG(x)
#endif

#ifdef DEBUGUPAP
#define UPAPDEBUG(x)	if (debug) dbglog x
#else
#define UPAPDEBUG(x)
#endif

#ifdef DEBUGCHAP
#define CHAPDEBUG(x)	if (debug) dbglog x
#else
#define CHAPDEBUG(x)
#endif

#ifdef DEBUGIPXCP
#define IPXCPDEBUG(x)	if (debug) dbglog x
#else
#define IPXCPDEBUG(x)
#endif

#ifndef SIGTYPE
#if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
#define SIGTYPE void
#else
#define SIGTYPE int
#endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
#endif /* SIGTYPE */

#ifndef MIN
#define MIN(a, b)	((a) < (b)? (a): (b))
#endif
#ifndef MAX
#define MAX(a, b)	((a) > (b)? (a): (b))
#endif

#endif /* __PPP_H__ */