2 * pppd.h - PPP daemon global declarations.
4 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
18 * 3. The name "Carnegie Mellon University" must not be used to
19 * endorse or promote products derived from this software without
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21 * details, please contact
22 * Office of Technology Transfer
23 * Carnegie Mellon University
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31 * "This product includes software developed by Computing Services
32 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
34 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
35 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
36 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
37 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
38 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
39 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
40 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
42 * $Id: pppd.h,v 1.96 2008/06/23 11:47:18 paulus Exp $
52 #include <stdio.h> /* for FILE */
53 #include <stdlib.h> /* for encrypt */
54 #include <unistd.h> /* for setkey */
55 #include <limits.h> /* for NGROUPS_MAX */
56 #include <sys/param.h> /* for MAXPATHLEN and BSD4_4, if defined */
57 #include <sys/types.h> /* for u_int32_t, if defined */
58 #include <sys/time.h> /* for struct timeval */
59 #include <net/ppp_defs.h>
60 #include "patchlevel.h"
67 #define __V(x) (va_alist) va_dcl
80 #define NUM_PPP 1 /* One PPP interface supported (per process) */
81 #define MAXWORDLEN 1024 /* max length of word in file (incl null) */
82 #define MAXARGS 1 /* max # args to a command */
83 #define MAXNAMELEN 256 /* max length of hostname or name for auth */
84 #define MAXSECRETLEN 256 /* max length of password or secret */
85 #define MAXIFNAMELEN 32 /* max length of interface name; or use IFNAMSIZ, can we
86 always include net/if.h? */
89 * If PPP_DRV_NAME is not defined, use the default "ppp" as the device name.
90 * Where should PPP_DRV_NAME come from? Do we include it here?
92 #if !defined(PPP_DRV_NAME)
93 #define PPP_DRV_NAME "ppp"
94 #endif /* !defined(PPP_DRV_NAME) */
97 * Option descriptor structure.
100 typedef unsigned char bool;
113 char *name; /* name of the option */
126 /* Values for flags */
127 #define OPT_VALUE 0xff /* mask for presupplied value */
128 #define OPT_HEX 0x100 /* int option is in hex */
129 #define OPT_NOARG 0x200 /* option doesn't take argument */
130 #define OPT_OR 0x400 /* for u32, OR in argument to value */
131 #define OPT_INC 0x400 /* for o_int, increment value */
132 #define OPT_A2OR 0x800 /* for o_bool, OR arg to *(u_char *)addr2 */
133 #define OPT_PRIV 0x1000 /* privileged option */
134 #define OPT_STATIC 0x2000 /* string option goes into static array */
135 #define OPT_NOINCR 0x2000 /* for o_int, value mustn't be increased */
136 #define OPT_LLIMIT 0x4000 /* check value against lower limit */
137 #define OPT_ULIMIT 0x8000 /* check value against upper limit */
138 #define OPT_LIMITS (OPT_LLIMIT|OPT_ULIMIT)
139 #define OPT_ZEROOK 0x10000 /* 0 value is OK even if not within limits */
140 #define OPT_HIDE 0x10000 /* for o_string, print value as ?????? */
141 #define OPT_A2LIST 0x20000 /* for o_special, keep list of values */
142 #define OPT_A2CLRB 0x20000 /* o_bool, clr val bits in *(u_char *)addr2 */
143 #define OPT_ZEROINF 0x40000 /* with OPT_NOINCR, 0 == infinity */
144 #define OPT_PRIO 0x80000 /* process option priorities for this option */
145 #define OPT_PRIOSUB 0x100000 /* subsidiary member of priority group */
146 #define OPT_ALIAS 0x200000 /* option is alias for previous option */
147 #define OPT_A2COPY 0x400000 /* addr2 -> second location to rcv value */
148 #define OPT_ENABLE 0x800000 /* use *addr2 as enable for option */
149 #define OPT_A2CLR 0x1000000 /* clear *(bool *)addr2 */
150 #define OPT_PRIVFIX 0x2000000 /* user can't override if set by root */
151 #define OPT_INITONLY 0x4000000 /* option can only be set in init phase */
152 #define OPT_DEVEQUIV 0x8000000 /* equiv to device name */
153 #define OPT_DEVNAM (OPT_INITONLY | OPT_DEVEQUIV)
154 #define OPT_A2PRINTER 0x10000000 /* *addr2 printer_func to print option */
155 #define OPT_A2STRVAL 0x20000000 /* *addr2 points to current string value */
156 #define OPT_NOPRINT 0x40000000 /* don't print this option at all */
158 #define OPT_VAL(x) ((x) & OPT_VALUE)
160 /* Values for priority */
161 #define OPRIO_DEFAULT 0 /* a default value */
162 #define OPRIO_CFGFILE 1 /* value from a configuration file */
163 #define OPRIO_CMDLINE 2 /* value from the command line */
164 #define OPRIO_SECFILE 3 /* value from options in a secrets file */
165 #define OPRIO_ROOT 100 /* added to priority if OPT_PRIVFIX && root */
168 #define GIDSET_TYPE gid_t
171 /* Structure representing a list of permitted IP addresses. */
172 struct permitted_ip {
173 int permit; /* 1 = permit, 0 = forbid */
174 u_int32_t base; /* match if (addr & mask) == base */
175 u_int32_t mask; /* base and mask are in network byte order */
179 * Unfortunately, the linux kernel driver uses a different structure
180 * for statistics from the rest of the ports.
181 * This structure serves as a common representation for the bits
185 unsigned int bytes_in;
186 unsigned int bytes_out;
187 unsigned int pkts_in;
188 unsigned int pkts_out;
191 /* Used for storing a sequence of words. Usually malloced. */
193 struct wordlist *next;
197 /* An endpoint discriminator, used with multilink. */
198 #define MAX_ENDP_LEN 20 /* maximum length of discriminator value */
201 unsigned char length;
202 unsigned char value[MAX_ENDP_LEN];
205 /* values for epdisc.class */
206 #define EPD_NULL 0 /* null discriminator, no data */
211 #define EPD_PHONENUM 5
213 typedef void (*notify_func) __P((void *, int));
214 typedef void (*printer_func) __P((void *, char *, ...));
217 struct notifier *next;
226 extern int hungup; /* Physical layer has disconnected */
227 extern int ifunit; /* Interface unit number */
228 extern char ifname[]; /* Interface name */
229 extern char hostname[]; /* Our hostname */
230 extern u_char outpacket_buf[]; /* Buffer for outgoing packets */
231 extern int devfd; /* fd of underlying device */
232 extern int fd_ppp; /* fd for talking PPP */
233 extern int phase; /* Current state of link - see values below */
234 extern int baud_rate; /* Current link speed in bits/sec */
235 extern char *progname; /* Name of this program */
236 extern int redirect_stderr;/* Connector's stderr should go to file */
237 extern char peer_authname[];/* Authenticated name of peer */
238 extern int auth_done[NUM_PPP]; /* Methods actually used for auth */
239 extern int privileged; /* We were run by real-uid root */
240 extern int need_holdoff; /* Need holdoff period after link terminates */
241 extern char **script_env; /* Environment variables for scripts */
242 extern int detached; /* Have detached from controlling tty */
243 extern GIDSET_TYPE groups[NGROUPS_MAX]; /* groups the user is in */
244 extern int ngroups; /* How many groups valid in groups */
245 extern struct pppd_stats link_stats; /* byte/packet counts etc. for link */
246 extern int link_stats_valid; /* set if link_stats is valid */
247 extern unsigned link_connect_time; /* time the link was up for */
248 extern int using_pty; /* using pty as device (notty or pty opt.) */
249 extern int log_to_fd; /* logging to this fd as well as syslog */
250 extern bool log_default; /* log_to_fd is default (stdout) */
251 extern char *no_ppp_msg; /* message to print if ppp not in kernel */
252 extern volatile int status; /* exit status for pppd */
253 extern bool devnam_fixed; /* can no longer change devnam */
254 extern int unsuccess; /* # unsuccessful connection attempts */
255 extern int do_callback; /* set if we want to do callback next */
256 extern int doing_callback; /* set if this is a callback */
257 extern int error_count; /* # of times error() has been called */
258 extern char ppp_devnam[MAXPATHLEN];
259 extern char remote_number[MAXNAMELEN]; /* Remote telephone number, if avail. */
260 extern int ppp_session_number; /* Session number (eg PPPoE session) */
261 extern int fd_devnull; /* fd open to /dev/null */
263 extern int listen_time; /* time to listen first (ms) */
264 extern bool doing_multilink;
265 extern bool multilink_master;
266 extern bool bundle_eof;
267 extern bool bundle_terminating;
269 extern struct notifier *pidchange; /* for notifications of pid changing */
270 extern struct notifier *phasechange; /* for notifications of phase changes */
271 extern struct notifier *exitnotify; /* for notification that we're exiting */
272 extern struct notifier *sigreceived; /* notification of received signal */
273 extern struct notifier *ip_up_notifier; /* IPCP has come up */
274 extern struct notifier *ip_down_notifier; /* IPCP has gone down */
275 extern struct notifier *ipv6_up_notifier; /* IPV6CP has come up */
276 extern struct notifier *ipv6_down_notifier; /* IPV6CP has gone down */
277 extern struct notifier *auth_up_notifier; /* peer has authenticated */
278 extern struct notifier *link_down_notifier; /* link has gone down */
279 extern struct notifier *fork_notifier; /* we are a new child process */
281 /* Values for do_callback and doing_callback */
282 #define CALLBACK_DIALIN 1 /* we are expecting the call back */
283 #define CALLBACK_DIALOUT 2 /* we are dialling out to call back */
286 * Variables set by command-line options.
289 extern int debug; /* Debug flag */
290 extern int kdebugflag; /* Tell kernel to print debug messages */
291 extern int default_device; /* Using /dev/tty or equivalent */
292 extern char devnam[MAXPATHLEN]; /* Device name */
293 extern int crtscts; /* Use hardware flow control */
294 extern int stop_bits; /* Number of serial port stop bits */
295 extern bool modem; /* Use modem control lines */
296 extern int inspeed; /* Input/Output speed requested */
297 extern u_int32_t netmask; /* IP netmask to set on interface */
298 extern bool lockflag; /* Create lock file to lock the serial dev */
299 extern bool nodetach; /* Don't detach from controlling tty */
301 extern bool up_sdnotify; /* Notify systemd once link is up (implies nodetach) */
303 extern bool updetach; /* Detach from controlling tty when link up */
304 extern bool master_detach; /* Detach when multilink master without link */
305 extern char *initializer; /* Script to initialize physical link */
306 extern char *connect_script; /* Script to establish physical link */
307 extern char *disconnect_script; /* Script to disestablish physical link */
308 extern char *welcomer; /* Script to welcome client after connection */
309 extern char *ptycommand; /* Command to run on other side of pty */
310 extern int maxconnect; /* Maximum connect time (seconds) */
311 extern char user[MAXNAMELEN];/* Our name for authenticating ourselves */
312 extern char passwd[MAXSECRETLEN]; /* Password for PAP or CHAP */
313 extern bool auth_required; /* Peer is required to authenticate */
314 extern bool persist; /* Reopen link after it goes down */
315 extern bool uselogin; /* Use /etc/passwd for checking PAP */
316 extern bool session_mgmt; /* Do session management (login records) */
317 extern char our_name[MAXNAMELEN];/* Our name for authentication purposes */
318 extern char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
319 extern bool explicit_remote;/* remote_name specified with remotename opt */
320 extern bool demand; /* Do dial-on-demand */
321 extern char *ipparam; /* Extra parameter for ip up/down scripts */
322 extern bool cryptpap; /* Others' PAP passwords are encrypted */
323 extern int idle_time_limit;/* Shut down link if idle for this long */
324 extern int holdoff; /* Dead time before restarting */
325 extern bool holdoff_specified; /* true if user gave a holdoff value */
326 extern bool notty; /* Stdin/out is not a tty */
327 extern char *pty_socket; /* Socket to connect to pty */
328 extern char *record_file; /* File to record chars sent/received */
329 extern bool sync_serial; /* Device is synchronous serial device */
330 extern int maxfail; /* Max # of unsuccessful connection attempts */
331 extern char linkname[MAXPATHLEN]; /* logical name for link */
332 extern bool tune_kernel; /* May alter kernel settings as necessary */
333 extern int connect_delay; /* Time to delay after connect script */
334 extern int max_data_rate; /* max bytes/sec through charshunt */
335 extern int req_unit; /* interface unit number to use */
336 extern char req_ifname[MAXIFNAMELEN]; /* interface name to use */
337 extern bool multilink; /* enable multilink operation */
338 extern bool noendpoint; /* don't send or accept endpt. discrim. */
339 extern char *bundle_name; /* bundle name for multilink */
340 extern bool dump_options; /* print out option values */
341 extern bool dryrun; /* check everything, print options, exit */
342 extern int child_wait; /* # seconds to wait for children at end */
345 extern unsigned int maxoctets; /* Maximum octetes per session (in bytes) */
346 extern int maxoctets_dir; /* Direction :
351 extern int maxoctets_timeout; /* Timeout for check of octets limit */
352 #define PPP_OCTETS_DIRECTION_SUM 0
353 #define PPP_OCTETS_DIRECTION_IN 1
354 #define PPP_OCTETS_DIRECTION_OUT 2
355 #define PPP_OCTETS_DIRECTION_MAXOVERAL 3
356 /* same as previos, but little different on RADIUS side */
357 #define PPP_OCTETS_DIRECTION_MAXSESSION 4
361 extern struct bpf_program pass_filter; /* Filter for pkts to pass */
362 extern struct bpf_program active_filter; /* Filter for link-active pkts */
366 extern bool ms_lanman; /* Use LanMan password instead of NT */
367 /* Has meaning only with MS-CHAP challenges */
370 /* Values for auth_pending, auth_done */
371 #define PAP_WITHPEER 0x1
373 #define CHAP_WITHPEER 0x4
374 #define CHAP_PEER 0x8
375 #define EAP_WITHPEER 0x10
376 #define EAP_PEER 0x20
378 /* Values for auth_done only */
379 #define CHAP_MD5_WITHPEER 0x40
380 #define CHAP_MD5_PEER 0x80
381 #define CHAP_MS_SHIFT 8 /* LSB position for MS auths */
382 #define CHAP_MS_WITHPEER 0x100
383 #define CHAP_MS_PEER 0x200
384 #define CHAP_MS2_WITHPEER 0x400
385 #define CHAP_MS2_PEER 0x800
387 extern char *current_option; /* the name of the option being parsed */
388 extern int privileged_option; /* set iff the current option came from root */
389 extern char *option_source; /* string saying where the option came from */
390 extern int option_priority; /* priority of current options */
396 #define PHASE_INITIALIZE 1
397 #define PHASE_SERIALCONN 2
398 #define PHASE_DORMANT 3
399 #define PHASE_ESTABLISH 4
400 #define PHASE_AUTHENTICATE 5
401 #define PHASE_CALLBACK 6
402 #define PHASE_NETWORK 7
403 #define PHASE_RUNNING 8
404 #define PHASE_TERMINATE 9
405 #define PHASE_DISCONNECT 10
406 #define PHASE_HOLDOFF 11
407 #define PHASE_MASTER 12
410 * The following struct gives the addresses of procedures to call
411 * for a particular protocol.
414 u_short protocol; /* PPP protocol number */
415 /* Initialization procedure */
416 void (*init) __P((int unit));
417 /* Process a received packet */
418 void (*input) __P((int unit, u_char *pkt, int len));
419 /* Process a received protocol-reject */
420 void (*protrej) __P((int unit));
421 /* Lower layer has come up */
422 void (*lowerup) __P((int unit));
423 /* Lower layer has gone down */
424 void (*lowerdown) __P((int unit));
425 /* Open the protocol */
426 void (*open) __P((int unit));
427 /* Close the protocol */
428 void (*close) __P((int unit, char *reason));
429 /* Print a packet in readable form */
430 int (*printpkt) __P((u_char *pkt, int len, printer_func printer,
432 /* Process a received data packet */
433 void (*datainput) __P((int unit, u_char *pkt, int len));
434 bool enabled_flag; /* 0 iff protocol is disabled */
435 char *name; /* Text name of protocol */
436 char *data_name; /* Text name of corresponding data protocol */
437 option_t *options; /* List of command-line options */
438 /* Check requested options, assign defaults */
439 void (*check_options) __P((void));
440 /* Configure interface for demand-dial */
441 int (*demand_conf) __P((int unit));
442 /* Say whether to bring up link for this pkt */
443 int (*active_pkt) __P((u_char *pkt, int len));
446 /* Table of pointers to supported protocols */
447 extern struct protent *protocols[];
450 * This struct contains pointers to a set of procedures for
451 * doing operations on a "channel". A channel provides a way
452 * to send and receive PPP packets - the canonical example is
453 * a serial port device in PPP line discipline (or equivalently
454 * with PPP STREAMS modules pushed onto it).
457 /* set of options for this channel */
459 /* find and process a per-channel options file */
460 void (*process_extra_options) __P((void));
461 /* check all the options that have been given */
462 void (*check_options) __P((void));
463 /* get the channel ready to do PPP, return a file descriptor */
464 int (*connect) __P((void));
465 /* we're finished with the channel */
466 void (*disconnect) __P((void));
467 /* put the channel into PPP `mode' */
468 int (*establish_ppp) __P((int));
469 /* take the channel out of PPP `mode', restore loopback if demand */
470 void (*disestablish_ppp) __P((int));
471 /* set the transmit-side PPP parameters of the channel */
472 void (*send_config) __P((int, u_int32_t, int, int));
473 /* set the receive-side PPP parameters of the channel */
474 void (*recv_config) __P((int, u_int32_t, int, int));
475 /* cleanup on error or normal exit */
476 void (*cleanup) __P((void));
477 /* close the device, called in children after fork */
478 void (*close) __P((void));
481 extern struct channel *the_channel;
484 * This structure contains environment variables that are set or unset
488 struct userenv *ue_next;
489 char *ue_value; /* value (set only) */
490 bool ue_isset; /* 1 for set, 0 for unset */
491 bool ue_priv; /* from privileged source */
492 const char *ue_source; /* source name */
493 char ue_name[1]; /* variable name */
496 extern struct userenv *userenv_list;
502 /* Procedures exported from main.c. */
503 void set_ifunit __P((int)); /* set stuff that depends on ifunit */
504 void detach __P((void)); /* Detach from controlling tty */
505 void die __P((int)); /* Cleanup and exit */
506 void quit __P((void)); /* like die(1) */
507 void novm __P((char *)); /* Say we ran out of memory, and die */
508 void timeout __P((void (*func)(void *), void *arg, int s, int us));
509 /* Call func(arg) after s.us seconds */
510 void untimeout __P((void (*func)(void *), void *arg));
511 /* Cancel call to func(arg) */
512 void record_child __P((int, char *, void (*) (void *), void *, int));
513 pid_t safe_fork __P((int, int, int)); /* Fork & close stuff in child */
514 int device_script __P((char *cmd, int in, int out, int dont_wait));
515 /* Run `cmd' with given stdin and stdout */
516 pid_t run_program __P((char *prog, char **args, int must_exist,
517 void (*done)(void *), void *arg, int wait));
518 /* Run program prog with args in child */
519 void reopen_log __P((void)); /* (re)open the connection to syslog */
520 void print_link_stats __P((void)); /* Print stats, if available */
521 void reset_link_stats __P((int)); /* Reset (init) stats when link goes up */
522 void update_link_stats __P((int)); /* Get stats at link termination */
523 void script_setenv __P((char *, char *, int)); /* set script env var */
524 void script_unsetenv __P((char *)); /* unset script env var */
525 void new_phase __P((int)); /* signal start of new phase */
526 void add_notifier __P((struct notifier **, notify_func, void *));
527 void remove_notifier __P((struct notifier **, notify_func, void *));
528 void notify __P((struct notifier *, int));
529 int ppp_send_config __P((int, int, u_int32_t, int, int));
530 int ppp_recv_config __P((int, int, u_int32_t, int, int));
531 const char *protocol_name __P((int));
532 void remove_pidfiles __P((void));
533 void lock_db __P((void));
534 void unlock_db __P((void));
536 /* Procedures exported from tty.c. */
537 void tty_init __P((void));
539 /* Procedures exported from utils.c. */
540 void log_packet __P((u_char *, int, char *, int));
541 /* Format a packet and log it with syslog */
542 void print_string __P((char *, int, printer_func, void *));
543 /* Format a string for output */
544 int slprintf __P((char *, int, char *, ...)); /* sprintf++ */
545 int vslprintf __P((char *, int, char *, va_list)); /* vsprintf++ */
546 size_t strlcpy __P((char *, const char *, size_t)); /* safe strcpy */
547 size_t strlcat __P((char *, const char *, size_t)); /* safe strncpy */
548 void dbglog __P((char *, ...)); /* log a debug message */
549 void info __P((char *, ...)); /* log an informational message */
550 void notice __P((char *, ...)); /* log a notice-level message */
551 void warn __P((char *, ...)); /* log a warning message */
552 void error __P((char *, ...)); /* log an error message */
553 void fatal __P((char *, ...)); /* log an error message and die(1) */
554 void init_pr_log __P((const char *, int)); /* initialize for using pr_log */
555 void pr_log __P((void *, char *, ...)); /* printer fn, output to syslog */
556 void end_pr_log __P((void)); /* finish up after using pr_log */
557 void dump_packet __P((const char *, u_char *, int));
558 /* dump packet to debug log if interesting */
559 ssize_t complete_read __P((int, void *, size_t));
560 /* read a complete buffer */
562 /* Procedures exported from auth.c */
563 void link_required __P((int)); /* we are starting to use the link */
564 void start_link __P((int)); /* bring the link up now */
565 void link_terminated __P((int)); /* we are finished with the link */
566 void link_down __P((int)); /* the LCP layer has left the Opened state */
567 void upper_layers_down __P((int));/* take all NCPs down */
568 void link_established __P((int)); /* the link is up; authenticate now */
569 void start_networks __P((int)); /* start all the network control protos */
570 void continue_networks __P((int)); /* start network [ip, etc] control protos */
571 void np_up __P((int, int)); /* a network protocol has come up */
572 void np_down __P((int, int)); /* a network protocol has gone down */
573 void np_finished __P((int, int)); /* a network protocol no longer needs link */
574 void auth_peer_fail __P((int, int));
575 /* peer failed to authenticate itself */
576 void auth_peer_success __P((int, int, int, char *, int));
577 /* peer successfully authenticated itself */
578 void auth_withpeer_fail __P((int, int));
579 /* we failed to authenticate ourselves */
580 void auth_withpeer_success __P((int, int, int));
581 /* we successfully authenticated ourselves */
582 void auth_check_options __P((void));
583 /* check authentication options supplied */
584 void auth_reset __P((int)); /* check what secrets we have */
585 int check_passwd __P((int, char *, int, char *, int, char **));
586 /* Check peer-supplied username/password */
587 int get_secret __P((int, char *, char *, char *, int *, int));
588 /* get "secret" for chap */
589 int get_srp_secret __P((int unit, char *client, char *server, char *secret,
591 int auth_ip_addr __P((int, u_int32_t));
592 /* check if IP address is authorized */
593 int auth_number __P((void)); /* check if remote number is authorized */
594 int bad_ip_adrs __P((u_int32_t));
595 /* check if IP address is unreasonable */
597 /* Procedures exported from demand.c */
598 void demand_conf __P((void)); /* config interface(s) for demand-dial */
599 void demand_block __P((void)); /* set all NPs to queue up packets */
600 void demand_unblock __P((void)); /* set all NPs to pass packets */
601 void demand_discard __P((void)); /* set all NPs to discard packets */
602 void demand_rexmit __P((int)); /* retransmit saved frames for an NP */
603 int loop_chars __P((unsigned char *, int)); /* process chars from loopback */
604 int loop_frame __P((unsigned char *, int)); /* should we bring link up? */
606 /* Procedures exported from multilink.c */
607 #ifdef HAVE_MULTILINK
608 void mp_check_options __P((void)); /* Check multilink-related options */
609 int mp_join_bundle __P((void)); /* join our link to an appropriate bundle */
610 void mp_exit_bundle __P((void)); /* have disconnected our link from bundle */
611 void mp_bundle_terminated __P((void));
612 char *epdisc_to_str __P((struct epdisc *)); /* string from endpoint discrim. */
613 int str_to_epdisc __P((struct epdisc *, char *)); /* endpt disc. from str */
615 #define mp_bundle_terminated() /* nothing */
616 #define mp_exit_bundle() /* nothing */
617 #define doing_multilink 0
618 #define multilink_master 0
621 /* Procedures exported from sys-*.c */
622 void sys_init __P((void)); /* Do system-dependent initialization */
623 void sys_cleanup __P((void)); /* Restore system state before exiting */
624 int sys_check_options __P((void)); /* Check options specified */
625 void sys_close __P((void)); /* Clean up in a child before execing */
626 int ppp_available __P((void)); /* Test whether ppp kernel support exists */
627 int get_pty __P((int *, int *, char *, int)); /* Get pty master/slave */
628 int open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
629 int tty_establish_ppp __P((int)); /* Turn serial port into a ppp interface */
630 void tty_disestablish_ppp __P((int)); /* Restore port to normal operation */
631 void generic_disestablish_ppp __P((int dev_fd)); /* Restore device setting */
632 int generic_establish_ppp __P((int dev_fd)); /* Make a ppp interface */
633 void make_new_bundle __P((int, int, int, int)); /* Create new bundle */
634 int bundle_attach __P((int)); /* Attach link to existing bundle */
635 void cfg_bundle __P((int, int, int, int)); /* Configure existing bundle */
636 void destroy_bundle __P((void)); /* Tell driver to destroy bundle */
637 void clean_check __P((void)); /* Check if line was 8-bit clean */
638 void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
639 void restore_tty __P((int)); /* Restore port's original parameters */
640 void setdtr __P((int, int)); /* Raise or lower port's DTR line */
641 void output __P((int, u_char *, int)); /* Output a PPP packet */
642 void wait_input __P((struct timeval *));
643 /* Wait for input, with timeout */
644 void add_fd __P((int)); /* Add fd to set to wait for */
645 void remove_fd __P((int)); /* Remove fd from set to wait for */
646 int read_packet __P((u_char *)); /* Read PPP packet */
647 int get_loop_output __P((void)); /* Read pkts from loopback */
648 void tty_send_config __P((int, u_int32_t, int, int));
649 /* Configure i/f transmit parameters */
650 void tty_set_xaccm __P((ext_accm));
651 /* Set extended transmit ACCM */
652 void tty_recv_config __P((int, u_int32_t, int, int));
653 /* Configure i/f receive parameters */
654 int ccp_test __P((int, u_char *, int, int));
655 /* Test support for compression scheme */
656 void ccp_flags_set __P((int, int, int));
657 /* Set kernel CCP state */
658 int ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
659 int get_idle_time __P((int, struct ppp_idle *));
660 /* Find out how long link has been idle */
661 int get_ppp_stats __P((int, struct pppd_stats *));
662 /* Return link statistics */
663 void netif_set_mtu __P((int, int)); /* Set PPP interface MTU */
664 int netif_get_mtu __P((int)); /* Get PPP interface MTU */
665 int sifvjcomp __P((int, int, int, int));
666 /* Configure VJ TCP header compression */
667 int sifup __P((int)); /* Configure i/f up for one protocol */
668 int sifnpmode __P((int u, int proto, enum NPmode mode));
669 /* Set mode for handling packets for proto */
670 int sifdown __P((int)); /* Configure i/f down for one protocol */
671 int sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
672 /* Configure IPv4 addresses for i/f */
673 int cifaddr __P((int, u_int32_t, u_int32_t));
674 /* Reset i/f IP addresses */
676 int ether_to_eui64(eui64_t *p_eui64); /* convert eth0 hw address to EUI64 */
677 int sif6up __P((int)); /* Configure i/f up for IPv6 */
678 int sif6down __P((int)); /* Configure i/f down for IPv6 */
679 int sif6addr __P((int, eui64_t, eui64_t));
680 /* Configure IPv6 addresses for i/f */
681 int cif6addr __P((int, eui64_t, eui64_t));
682 /* Remove an IPv6 address from i/f */
684 int sifdefaultroute __P((int, u_int32_t, u_int32_t));
685 /* Create default route through i/f */
686 int cifdefaultroute __P((int, u_int32_t, u_int32_t));
687 /* Delete default route through i/f */
689 int sif6defaultroute __P((int, eui64_t, eui64_t));
690 /* Create default IPv6 route through i/f */
691 int cif6defaultroute __P((int, eui64_t, eui64_t));
692 /* Delete default IPv6 route through i/f */
694 int sifproxyarp __P((int, u_int32_t));
695 /* Add proxy ARP entry for peer */
696 int cifproxyarp __P((int, u_int32_t));
697 /* Delete proxy ARP entry for peer */
698 u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
699 int lock __P((char *)); /* Create lock file for device */
700 int relock __P((int)); /* Rewrite lock file with new pid */
701 void unlock __P((void)); /* Delete previously-created lock file */
702 void logwtmp __P((const char *, const char *, const char *));
703 /* Write entry to wtmp file */
704 int get_host_seed __P((void)); /* Get host-dependent random number seed */
705 int have_route_to __P((u_int32_t)); /* Check if route to addr exists */
707 int set_filters __P((struct bpf_program *pass, struct bpf_program *active));
708 /* Set filter programs in kernel */
711 int sipxfaddr __P((int, unsigned long, unsigned char *));
712 int cipxfaddr __P((int));
714 int get_if_hwaddr __P((u_char *addr, char *name));
715 char *get_first_ethernet __P((void));
717 /* Procedures exported from options.c */
718 int setipaddr __P((char *, char **, int)); /* Set local/remote ip addresses */
719 int parse_args __P((int argc, char **argv));
720 /* Parse options from arguments given */
721 int options_from_file __P((char *filename, int must_exist, int check_prot,
723 /* Parse options from an options file */
724 int options_from_user __P((void)); /* Parse options from user's .ppprc */
725 int options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
726 int options_from_list __P((struct wordlist *, int privileged));
727 /* Parse options from a wordlist */
728 int getword __P((FILE *f, char *word, int *newlinep, char *filename));
729 /* Read a word from a file */
730 void option_error __P((char *fmt, ...));
731 /* Print an error message about an option */
732 int int_option __P((char *, int *));
733 /* Simplified number_option for decimal ints */
734 void add_options __P((option_t *)); /* Add extra options */
735 void check_options __P((void)); /* check values after all options parsed */
736 int override_value __P((const char *, int, const char *));
737 /* override value if permitted by priority */
738 void print_options __P((printer_func, void *));
739 /* print out values of all options */
741 int parse_dotted_ip __P((char *, u_int32_t *));
744 * Hooks to enable plugins to change various things.
746 extern int (*new_phase_hook) __P((int));
747 extern int (*idle_time_hook) __P((struct ppp_idle *));
748 extern int (*holdoff_hook) __P((void));
749 extern int (*pap_check_hook) __P((void));
750 extern int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
751 struct wordlist **paddrs,
752 struct wordlist **popts));
753 extern void (*pap_logout_hook) __P((void));
754 extern int (*pap_passwd_hook) __P((char *user, char *passwd));
755 extern int (*allowed_address_hook) __P((u_int32_t addr));
756 extern void (*ip_up_hook) __P((void));
757 extern void (*ip_down_hook) __P((void));
758 extern void (*ip_choose_hook) __P((u_int32_t *));
759 extern void (*ipv6_up_hook) __P((void));
760 extern void (*ipv6_down_hook) __P((void));
762 extern int (*chap_check_hook) __P((void));
763 extern int (*chap_passwd_hook) __P((char *user, char *passwd));
764 extern void (*multilink_join_hook) __P((void));
766 /* Let a plugin snoop sent and received packets. Useful for L2TP */
767 extern void (*snoop_recv_hook) __P((unsigned char *p, int len));
768 extern void (*snoop_send_hook) __P((unsigned char *p, int len));
771 * Inline versions of get/put char/short/long.
772 * Pointer is advanced; we assume that both arguments
773 * are lvalues and will already be in registers.
774 * cp MUST be u_char *.
776 #define GETCHAR(c, cp) { \
779 #define PUTCHAR(c, cp) { \
780 *(cp)++ = (u_char) (c); \
784 #define GETSHORT(s, cp) { \
785 (s) = *(cp)++ << 8; \
788 #define PUTSHORT(s, cp) { \
789 *(cp)++ = (u_char) ((s) >> 8); \
790 *(cp)++ = (u_char) (s); \
793 #define GETLONG(l, cp) { \
794 (l) = *(cp)++ << 8; \
795 (l) |= *(cp)++; (l) <<= 8; \
796 (l) |= *(cp)++; (l) <<= 8; \
799 #define PUTLONG(l, cp) { \
800 *(cp)++ = (u_char) ((l) >> 24); \
801 *(cp)++ = (u_char) ((l) >> 16); \
802 *(cp)++ = (u_char) ((l) >> 8); \
803 *(cp)++ = (u_char) (l); \
806 #define INCPTR(n, cp) ((cp) += (n))
807 #define DECPTR(n, cp) ((cp) -= (n))
810 * System dependent definitions for user-level 4.3BSD UNIX implementation.
813 #define TIMEOUT(r, f, t) timeout((r), (f), (t), 0)
814 #define UNTIMEOUT(r, f) untimeout((r), (f))
816 #define BCOPY(s, d, l) memcpy(d, s, l)
817 #define BZERO(s, n) memset(s, 0, n)
818 #define BCMP(s1, s2, l) memcmp(s1, s2, l)
820 #define PRINTMSG(m, l) { info("Remote message: %0.*v", l, m); }
823 * MAKEHEADER - Add Header fields to a packet.
825 #define MAKEHEADER(p, t) { \
826 PUTCHAR(PPP_ALLSTATIONS, p); \
827 PUTCHAR(PPP_UI, p); \
831 * Exit status values.
834 #define EXIT_FATAL_ERROR 1
835 #define EXIT_OPTION_ERROR 2
836 #define EXIT_NOT_ROOT 3
837 #define EXIT_NO_KERNEL_SUPPORT 4
838 #define EXIT_USER_REQUEST 5
839 #define EXIT_LOCK_FAILED 6
840 #define EXIT_OPEN_FAILED 7
841 #define EXIT_CONNECT_FAILED 8
842 #define EXIT_PTYCMD_FAILED 9
843 #define EXIT_NEGOTIATION_FAILED 10
844 #define EXIT_PEER_AUTH_FAILED 11
845 #define EXIT_IDLE_TIMEOUT 12
846 #define EXIT_CONNECT_TIME 13
847 #define EXIT_CALLBACK 14
848 #define EXIT_PEER_DEAD 15
849 #define EXIT_HANGUP 16
850 #define EXIT_LOOPBACK 17
851 #define EXIT_INIT_FAILED 18
852 #define EXIT_AUTH_TOPEER_FAILED 19
854 #define EXIT_TRAFFIC_LIMIT 20
856 #define EXIT_CNID_AUTH_FAILED 21
859 * Debug macros. Slightly useful for finding bugs in pppd, not particularly
860 * useful for finding out why your connection isn't being established.
867 #define DEBUGIPV6CP 1
872 #ifndef LOG_PPP /* we use LOG_LOCAL2 for syslog by default */
873 #if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
874 || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
875 || defined(DEBUGCHAP) || defined(DEBUG) || defined(DEBUGIPV6CP)
876 #define LOG_PPP LOG_LOCAL2
878 #define LOG_PPP LOG_DAEMON
883 #define MAINDEBUG(x) if (debug) dbglog x
889 #define SYSDEBUG(x) if (debug) dbglog x
895 #define FSMDEBUG(x) if (debug) dbglog x
901 #define LCPDEBUG(x) if (debug) dbglog x
907 #define IPCPDEBUG(x) if (debug) dbglog x
913 #define IPV6CPDEBUG(x) if (debug) dbglog x
915 #define IPV6CPDEBUG(x)
919 #define UPAPDEBUG(x) if (debug) dbglog x
925 #define CHAPDEBUG(x) if (debug) dbglog x
931 #define IPXCPDEBUG(x) if (debug) dbglog x
933 #define IPXCPDEBUG(x)
937 #if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
941 #endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
945 #define MIN(a, b) ((a) < (b)? (a): (b))
948 #define MAX(a, b) ((a) > (b)? (a): (b))
952 #define offsetof(type, member) ((size_t) &((type *)0)->member)
955 #endif /* __PPP_H__ */