2 * options.c - handles option processing for PPP.
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.
20 #define RCSID "$Id: options.c,v 1.1.1.4 2003/10/14 08:09:53 sparq Exp $"
40 #include "pathnames.h"
42 #if defined(ultrix) || defined(NeXT)
43 char *strdup
__P((char *));
46 static const char rcsid
[] = RCSID
;
49 struct option_value
*next
;
55 * Option variables and default values.
58 int dflag
= 0; /* Tell libpcap we want debugging */
60 int debug
= 0; /* Debug flag */
61 int kdebugflag
= 0; /* Tell kernel to print debug messages */
62 int default_device
= 1; /* Using /dev/tty or equivalent */
63 char devnam
[MAXPATHLEN
]; /* Device name */
64 bool nodetach
= 0; /* Don't detach from controlling tty */
65 bool updetach
= 0; /* Detach once link is up */
66 int maxconnect
= 0; /* Maximum connect time */
67 char user
[MAXNAMELEN
]; /* Username for PAP */
68 char passwd
[MAXSECRETLEN
]; /* Password for PAP */
69 bool persist
= 0; /* Reopen link after it goes down */
70 char our_name
[MAXNAMELEN
]; /* Our name for authentication purposes */
71 bool demand
= 0; /* do dial-on-demand */
72 char *ipparam
= NULL
; /* Extra parameter for ip up/down scripts */
73 int idle_time_limit
= 0; /* Disconnect if idle for this many seconds */
74 int holdoff
= 30; /* # seconds to pause before reconnecting */
75 bool holdoff_specified
; /* true if a holdoff value has been given */
76 int log_to_fd
= 1; /* send log messages to this fd too */
77 bool log_default
= 1; /* log_to_fd is default (stdout) */
78 int maxfail
= 10; /* max # of unsuccessful connection attempts */
79 char linkname
[MAXPATHLEN
]; /* logical name for link */
80 bool tune_kernel
; /* may alter kernel settings */
81 int connect_delay
= 1000; /* wait this many ms after connect script */
82 int req_unit
= -1; /* requested interface unit */
83 bool multilink
= 0; /* Enable multilink operation */
84 char *bundle_name
= NULL
; /* bundle name for multilink */
85 bool dump_options
; /* print out option values */
86 bool dryrun
; /* print out option values and exit */
87 char *domain
; /* domain name set by domain option */
89 extern option_t auth_options
[];
90 extern struct stat devstat
;
93 struct bpf_program pass_filter
;/* Filter program for packets to pass */
94 struct bpf_program active_filter
; /* Filter program for link-active pkts */
95 pcap_t pc
; /* Fake struct pcap so we can compile expr */
98 char *current_option
; /* the name of the option being parsed */
99 int privileged_option
; /* set iff the current option came from root */
100 char *option_source
; /* string saying where the option came from */
101 int option_priority
= OPRIO_CFGFILE
; /* priority of the current options */
102 bool devnam_fixed
; /* can no longer change device name */
104 static int logfile_fd
= -1; /* fd opened for log file */
105 static char logfile_name
[MAXPATHLEN
]; /* name of log file */
110 static int setdomain
__P((char **));
111 static int readfile
__P((char **));
112 static int callfile
__P((char **));
113 static int showversion
__P((char **));
114 static int showhelp
__P((char **));
115 static void usage
__P((void));
116 static int setlogfile
__P((char **));
118 static int loadplugin
__P((char **));
122 static int setpassfilter
__P((char **));
123 static int setactivefilter
__P((char **));
126 static option_t
*find_option
__P((const char *name
));
127 static int process_option
__P((option_t
*, char *, char **));
128 static int n_arguments
__P((option_t
*));
129 static int number_option
__P((char *, u_int32_t
*, int));
132 * Structure to store extra lists of options.
136 struct option_list
*next
;
139 static struct option_list
*extra_options
= NULL
;
144 option_t general_options
[] = {
145 { "debug", o_int
, &debug
,
146 "Increase debugging level", OPT_INC
| OPT_NOARG
| 1 },
147 { "-d", o_int
, &debug
,
148 "Increase debugging level",
149 OPT_ALIAS
| OPT_INC
| OPT_NOARG
| 1 },
151 { "kdebug", o_int
, &kdebugflag
,
152 "Set kernel driver debug level", OPT_PRIO
},
154 { "nodetach", o_bool
, &nodetach
,
155 "Don't detach from controlling tty", OPT_PRIO
| 1 },
156 { "-detach", o_bool
, &nodetach
,
157 "Don't detach from controlling tty", OPT_ALIAS
| OPT_PRIOSUB
| 1 },
158 { "updetach", o_bool
, &updetach
,
159 "Detach from controlling tty once link is up",
160 OPT_PRIOSUB
| OPT_A2CLR
| 1, &nodetach
},
162 { "holdoff", o_int
, &holdoff
,
163 "Set time in seconds before retrying connection", OPT_PRIO
},
165 { "idle", o_int
, &idle_time_limit
,
166 "Set time in seconds before disconnecting idle link", OPT_PRIO
},
168 { "maxconnect", o_int
, &maxconnect
,
169 "Set connection time limit",
170 OPT_PRIO
| OPT_LLIMIT
| OPT_NOINCR
| OPT_ZEROINF
},
172 { "domain", o_special
, (void *)setdomain
,
173 "Add given domain name to hostname",
174 OPT_PRIO
| OPT_PRIV
| OPT_A2STRVAL
, &domain
},
176 { "file", o_special
, (void *)readfile
,
177 "Take options from a file", OPT_NOPRINT
},
178 { "call", o_special
, (void *)callfile
,
179 "Take options from a privileged file", OPT_NOPRINT
},
181 { "persist", o_bool
, &persist
,
182 "Keep on reopening connection after close", OPT_PRIO
| 1 },
183 { "nopersist", o_bool
, &persist
,
184 "Turn off persist option", OPT_PRIOSUB
},
186 { "demand", o_bool
, &demand
,
187 "Dial on demand", OPT_INITONLY
| 1, &persist
},
189 { "--version", o_special_noarg
, (void *)showversion
,
190 "Show version number" },
191 { "--help", o_special_noarg
, (void *)showhelp
,
192 "Show brief listing of options" },
193 { "-h", o_special_noarg
, (void *)showhelp
,
194 "Show brief listing of options", OPT_ALIAS
},
196 { "logfile", o_special
, (void *)setlogfile
,
197 "Append log messages to this file",
198 OPT_PRIO
| OPT_A2STRVAL
| OPT_STATIC
, &logfile_name
},
199 { "logfd", o_int
, &log_to_fd
,
200 "Send log messages to this file descriptor",
201 OPT_PRIOSUB
| OPT_A2CLR
, &log_default
},
202 { "nolog", o_int
, &log_to_fd
,
203 "Don't send log messages to any file",
204 OPT_PRIOSUB
| OPT_NOARG
| OPT_VAL(-1) },
205 { "nologfd", o_int
, &log_to_fd
,
206 "Don't send log messages to any file descriptor",
207 OPT_PRIOSUB
| OPT_ALIAS
| OPT_NOARG
| OPT_VAL(-1) },
209 { "linkname", o_string
, linkname
,
210 "Set logical name for link",
211 OPT_PRIO
| OPT_PRIV
| OPT_STATIC
, NULL
, MAXPATHLEN
},
213 { "maxfail", o_int
, &maxfail
,
214 "Maximum number of unsuccessful connection attempts to allow",
217 { "ktune", o_bool
, &tune_kernel
,
218 "Alter kernel settings as necessary", OPT_PRIO
| 1 },
219 { "noktune", o_bool
, &tune_kernel
,
220 "Don't alter kernel settings", OPT_PRIOSUB
},
222 { "connect-delay", o_int
, &connect_delay
,
223 "Maximum time (in ms) to wait after connect script finishes",
226 { "unit", o_int
, &req_unit
,
227 "PPP interface unit number to use if possible",
228 OPT_PRIO
| OPT_LLIMIT
, 0, 0 },
230 { "dump", o_bool
, &dump_options
,
231 "Print out option values after parsing all options", 1 },
232 { "dryrun", o_bool
, &dryrun
,
233 "Stop after parsing, printing, and checking options", 1 },
235 #ifdef HAVE_MULTILINK
236 { "multilink", o_bool
, &multilink
,
237 "Enable multilink operation", OPT_PRIO
| 1 },
238 { "mp", o_bool
, &multilink
,
239 "Enable multilink operation", OPT_PRIOSUB
| OPT_ALIAS
| 1 },
240 { "nomultilink", o_bool
, &multilink
,
241 "Disable multilink operation", OPT_PRIOSUB
| 0 },
242 { "nomp", o_bool
, &multilink
,
243 "Disable multilink operation", OPT_PRIOSUB
| OPT_ALIAS
| 0 },
245 { "bundle", o_string
, &bundle_name
,
246 "Bundle name for multilink", OPT_PRIO
},
247 #endif /* HAVE_MULTILINK */
250 { "plugin", o_special
, (void *)loadplugin
,
251 "Load a plug-in module into pppd", OPT_PRIV
| OPT_A2LIST
},
255 { "pdebug", o_int
, &dflag
,
256 "libpcap debugging", OPT_PRIO
},
258 { "pass-filter", 1, setpassfilter
,
259 "set filter for packets to pass", OPT_PRIO
},
261 { "active-filter", 1, setactivefilter
,
262 "set filter for active pkts", OPT_PRIO
},
268 #ifndef IMPLEMENTATION
269 #define IMPLEMENTATION ""
272 static char *usage_string
= "\
274 Usage: %s [ options ], where options are:\n\
275 <device> Communicate over the named device\n\
276 <speed> Set the baud rate to <speed>\n\
277 <loc>:<rem> Set the local and/or remote interface IP\n\
278 addresses. Either one may be omitted.\n\
279 asyncmap <n> Set the desired async map to hex <n>\n\
280 auth Require authentication from peer\n\
281 connect <p> Invoke shell command <p> to set up the serial line\n\
282 crtscts Use hardware RTS/CTS flow control\n\
283 defaultroute Add default route through interface\n\
284 file <f> Take options from file <f>\n\
285 modem Use modem control lines\n\
286 mru <n> Set MRU value to <n> for negotiation\n\
287 See pppd(8) for more options.\n\
291 * parse_args - parse a string of arguments from the command line.
294 parse_args(argc
, argv
)
302 privileged_option
= privileged
;
303 option_source
= "command line";
304 option_priority
= OPRIO_CMDLINE
;
308 opt
= find_option(arg
);
310 option_error("unrecognized option '%s'", arg
);
314 n
= n_arguments(opt
);
316 option_error("too few parameters for option %s", arg
);
319 if (!process_option(opt
, arg
, argv
))
328 * options_from_file - Read a string of options from a file,
329 * and interpret them.
332 options_from_file(filename
, must_exist
, check_prot
, priv
)
339 int i
, newline
, ret
, err
;
344 char args
[MAXARGS
][MAXWORDLEN
];
345 char cmd
[MAXWORDLEN
];
349 f
= fopen(filename
, "r");
356 if (err
!= ENOENT
&& err
!= ENOTDIR
)
357 warn("Warning: can't open options file %s: %m", filename
);
360 option_error("Can't open options file %s: %m", filename
);
364 oldpriv
= privileged_option
;
365 privileged_option
= priv
;
366 oldsource
= option_source
;
367 option_source
= strdup(filename
);
368 if (option_source
== NULL
)
369 option_source
= "file";
371 while (getword(f
, cmd
, &newline
, filename
)) {
372 opt
= find_option(cmd
);
374 option_error("In file %s: unrecognized option '%s'",
378 n
= n_arguments(opt
);
379 for (i
= 0; i
< n
; ++i
) {
380 if (!getword(f
, args
[i
], &newline
, filename
)) {
382 "In file %s: too few parameters for option '%s'",
388 if (!process_option(opt
, cmd
, argv
))
395 privileged_option
= oldpriv
;
396 option_source
= oldsource
;
401 * options_from_user - See if the use has a ~/.ppprc file,
402 * and if so, interpret options from it.
407 char *user
, *path
, *file
;
412 pw
= getpwuid(getuid());
413 if (pw
== NULL
|| (user
= pw
->pw_dir
) == NULL
|| user
[0] == 0)
415 file
= _PATH_USEROPT
;
416 pl
= strlen(user
) + strlen(file
) + 2;
419 novm("init file name");
420 slprintf(path
, pl
, "%s/%s", user
, file
);
421 option_priority
= OPRIO_CFGFILE
;
422 ret
= options_from_file(path
, 0, 1, privileged
);
428 * options_for_tty - See if an options file exists for the serial
429 * device, and if so, interpret options from it.
430 * We only allow the per-tty options file to override anything from
431 * the command line if it is something that the user can't override
432 * once it has been set by root; this is done by giving configuration
433 * files a lower priority than the command line.
438 char *dev
, *path
, *p
;
443 if (strncmp(dev
, "/dev/", 5) == 0)
445 if (dev
[0] == 0 || strcmp(dev
, "tty") == 0)
446 return 1; /* don't look for /etc/ppp/options.tty */
447 pl
= strlen(_PATH_TTYOPT
) + strlen(dev
) + 1;
450 novm("tty init file name");
451 slprintf(path
, pl
, "%s%s", _PATH_TTYOPT
, dev
);
452 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
453 for (p
= path
+ strlen(_PATH_TTYOPT
); *p
!= 0; ++p
)
456 option_priority
= OPRIO_CFGFILE
;
457 ret
= options_from_file(path
, 0, 0, 1);
463 * options_from_list - process a string of options in a wordlist.
466 options_from_list(w
, priv
)
475 privileged_option
= priv
;
476 option_source
= "secrets file";
477 option_priority
= OPRIO_SECFILE
;
480 opt
= find_option(w
->word
);
482 option_error("In secrets file: unrecognized option '%s'",
486 n
= n_arguments(opt
);
488 for (i
= 0; i
< n
; ++i
) {
492 "In secrets file: too few parameters for option '%s'",
498 if (!process_option(opt
, w0
->word
, argv
))
509 * match_option - see if this option matches an option_t structure.
512 match_option(name
, opt
, dowild
)
517 int (*match
) __P((char *, char **, int));
519 if (dowild
!= (opt
->type
== o_wild
))
522 return strcmp(name
, opt
->name
) == 0;
523 match
= (int (*) __P((char *, char **, int))) opt
->addr
;
524 return (*match
)(name
, NULL
, 0);
528 * find_option - scan the option lists for the various protocols
529 * looking for an entry with the given name.
530 * This could be optimized by using a hash table.
537 struct option_list
*list
;
540 for (dowild
= 0; dowild
<= 1; ++dowild
) {
541 for (opt
= general_options
; opt
->name
!= NULL
; ++opt
)
542 if (match_option(name
, opt
, dowild
))
544 for (opt
= auth_options
; opt
->name
!= NULL
; ++opt
)
545 if (match_option(name
, opt
, dowild
))
547 for (list
= extra_options
; list
!= NULL
; list
= list
->next
)
548 for (opt
= list
->options
; opt
->name
!= NULL
; ++opt
)
549 if (match_option(name
, opt
, dowild
))
551 for (opt
= the_channel
->options
; opt
->name
!= NULL
; ++opt
)
552 if (match_option(name
, opt
, dowild
))
554 for (i
= 0; protocols
[i
] != NULL
; ++i
)
555 if ((opt
= protocols
[i
]->options
) != NULL
)
556 for (; opt
->name
!= NULL
; ++opt
)
557 if (match_option(name
, opt
, dowild
))
564 * process_option - process one new-style option.
567 process_option(opt
, cmd
, argv
)
575 int (*parser
) __P((char **));
576 int (*wildp
) __P((char *, char **, int));
577 char *optopt
= (opt
->type
== o_wild
)? "": " option";
578 int prio
= option_priority
;
579 option_t
*mainopt
= opt
;
581 if ((opt
->flags
& OPT_PRIVFIX
) && privileged_option
)
583 while (mainopt
->flags
& OPT_PRIOSUB
)
585 if (mainopt
->flags
& OPT_PRIO
) {
586 if (prio
< mainopt
->priority
) {
587 /* new value doesn't override old */
588 if (prio
== OPRIO_CMDLINE
&& mainopt
->priority
> OPRIO_ROOT
) {
589 option_error("%s%s set in %s cannot be overridden\n",
590 opt
->name
, optopt
, mainopt
->source
);
595 if (prio
> OPRIO_ROOT
&& mainopt
->priority
== OPRIO_CMDLINE
)
596 warn("%s%s from %s overrides command line",
597 opt
->name
, optopt
, option_source
);
600 if ((opt
->flags
& OPT_INITONLY
) && phase
!= PHASE_INITIALIZE
) {
601 option_error("%s%s cannot be changed after initialization",
605 if ((opt
->flags
& OPT_PRIV
) && !privileged_option
) {
606 option_error("using the %s%s requires root privilege",
610 if ((opt
->flags
& OPT_ENABLE
) && *(bool *)(opt
->addr2
) == 0) {
611 option_error("%s%s is disabled", opt
->name
, optopt
);
614 if ((opt
->flags
& OPT_DEVEQUIV
) && devnam_fixed
) {
615 option_error("the %s%s may not be changed in %s",
616 opt
->name
, optopt
, option_source
);
622 v
= opt
->flags
& OPT_VALUE
;
623 *(bool *)(opt
->addr
) = v
;
624 if (opt
->addr2
&& (opt
->flags
& OPT_A2COPY
))
625 *(bool *)(opt
->addr2
) = v
;
630 if ((opt
->flags
& OPT_NOARG
) == 0) {
631 if (!int_option(*argv
, &iv
))
633 if ((((opt
->flags
& OPT_LLIMIT
) && iv
< opt
->lower_limit
)
634 || ((opt
->flags
& OPT_ULIMIT
) && iv
> opt
->upper_limit
))
635 && !((opt
->flags
& OPT_ZEROOK
&& iv
== 0))) {
636 char *zok
= (opt
->flags
& OPT_ZEROOK
)? " zero or": "";
637 switch (opt
->flags
& OPT_LIMITS
) {
639 option_error("%s value must be%s >= %d",
640 opt
->name
, zok
, opt
->lower_limit
);
643 option_error("%s value must be%s <= %d",
644 opt
->name
, zok
, opt
->upper_limit
);
647 option_error("%s value must be%s between %d and %d",
648 opt
->name
, opt
->lower_limit
, opt
->upper_limit
);
654 a
= opt
->flags
& OPT_VALUE
;
656 a
-= 256; /* sign extend */
658 if (opt
->flags
& OPT_INC
)
659 iv
+= *(int *)(opt
->addr
);
660 if ((opt
->flags
& OPT_NOINCR
) && !privileged_option
) {
661 int oldv
= *(int *)(opt
->addr
);
662 if ((opt
->flags
& OPT_ZEROINF
) ?
663 (oldv
!= 0 && (iv
== 0 || iv
> oldv
)) : (iv
> oldv
)) {
664 option_error("%s value cannot be increased", opt
->name
);
668 *(int *)(opt
->addr
) = iv
;
669 if (opt
->addr2
&& (opt
->flags
& OPT_A2COPY
))
670 *(int *)(opt
->addr2
) = iv
;
674 if (opt
->flags
& OPT_NOARG
) {
675 v
= opt
->flags
& OPT_VALUE
;
678 } else if (!number_option(*argv
, &v
, 16))
680 if (opt
->flags
& OPT_OR
)
681 v
|= *(u_int32_t
*)(opt
->addr
);
682 *(u_int32_t
*)(opt
->addr
) = v
;
683 if (opt
->addr2
&& (opt
->flags
& OPT_A2COPY
))
684 *(u_int32_t
*)(opt
->addr2
) = v
;
688 if (opt
->flags
& OPT_STATIC
) {
689 strlcpy((char *)(opt
->addr
), *argv
, opt
->upper_limit
);
693 novm("option argument");
694 *(char **)(opt
->addr
) = sv
;
698 case o_special_noarg
:
700 parser
= (int (*) __P((char **))) opt
->addr
;
701 if (!(*parser
)(argv
))
703 if (opt
->flags
& OPT_A2LIST
) {
704 struct option_value
*ovp
, **pp
;
706 ovp
= malloc(sizeof(*ovp
) + strlen(*argv
));
708 strcpy(ovp
->value
, *argv
);
709 ovp
->source
= option_source
;
711 pp
= (struct option_value
**) &opt
->addr2
;
720 wildp
= (int (*) __P((char *, char **, int))) opt
->addr
;
721 if (!(*wildp
)(cmd
, argv
, 1))
726 if (opt
->addr2
&& (opt
->flags
& (OPT_A2COPY
|OPT_ENABLE
727 |OPT_A2PRINTER
|OPT_A2STRVAL
|OPT_A2LIST
)) == 0)
728 *(bool *)(opt
->addr2
) = !(opt
->flags
& OPT_A2CLR
);
730 mainopt
->source
= option_source
;
731 mainopt
->priority
= prio
;
732 mainopt
->winner
= opt
- mainopt
;
738 * override_value - if the option priorities would permit us to
739 * override the value of option, return 1 and update the priority
740 * and source of the option value. Otherwise returns 0.
743 override_value(option
, priority
, source
)
750 opt
= find_option(option
);
753 while (opt
->flags
& OPT_PRIOSUB
)
755 if ((opt
->flags
& OPT_PRIO
) && priority
< opt
->priority
)
757 opt
->priority
= priority
;
758 opt
->source
= source
;
764 * n_arguments - tell how many arguments an option takes
770 return (opt
->type
== o_bool
|| opt
->type
== o_special_noarg
771 || (opt
->flags
& OPT_NOARG
))? 0: 1;
775 * add_options - add a list of options to the set we grok.
781 struct option_list
*list
;
783 list
= malloc(sizeof(*list
));
785 novm("option list entry");
787 list
->next
= extra_options
;
788 extra_options
= list
;
792 * remove_option - permanently remove an option from consideration...
793 * for use by modules to remove choices which no longer make sense.
794 * returns true if found an option
801 o
= find_option(name
);
809 * check_options - check that options are valid and consistent.
814 if (logfile_fd
>= 0 && logfile_fd
!= log_to_fd
)
819 * print_option - print out an option and its value
822 print_option(opt
, mainopt
, printer
, arg
)
823 option_t
*opt
, *mainopt
;
824 void (*printer
) __P((void *, char *, ...));
830 if (opt
->flags
& OPT_NOPRINT
)
834 v
= opt
->flags
& OPT_VALUE
;
835 if (*(bool *)opt
->addr
!= v
)
836 /* this can happen legitimately, e.g. lock
837 option turned off for default device */
839 printer(arg
, "%s", opt
->name
);
842 v
= opt
->flags
& OPT_VALUE
;
845 i
= *(int *)opt
->addr
;
846 if (opt
->flags
& OPT_NOARG
) {
847 printer(arg
, "%s", opt
->name
);
849 if (opt
->flags
& OPT_INC
) {
850 for (; i
> v
; i
-= v
)
851 printer(arg
, " %s", opt
->name
);
853 printer(arg
, " # oops: %d not %d\n",
857 printer(arg
, "%s %d", opt
->name
, i
);
861 printer(arg
, "%s", opt
->name
);
862 if ((opt
->flags
& OPT_NOARG
) == 0)
863 printer(arg
, " %x", *(u_int32_t
*)opt
->addr
);
867 if (opt
->flags
& OPT_HIDE
) {
870 p
= (char *) opt
->addr
;
871 if ((opt
->flags
& OPT_STATIC
) == 0)
874 printer(arg
, "%s %q", opt
->name
, p
);
878 case o_special_noarg
:
880 if (opt
->type
!= o_wild
) {
881 printer(arg
, "%s", opt
->name
);
882 if (n_arguments(opt
) == 0)
886 if (opt
->flags
& OPT_A2PRINTER
) {
887 void (*oprt
) __P((option_t
*,
888 void ((*)__P((void *, char *, ...))),
891 (*oprt
)(opt
, printer
, arg
);
892 } else if (opt
->flags
& OPT_A2STRVAL
) {
893 p
= (char *) opt
->addr2
;
894 if ((opt
->flags
& OPT_STATIC
) == 0)
897 } else if (opt
->flags
& OPT_A2LIST
) {
898 struct option_value
*ovp
;
900 ovp
= (struct option_value
*) opt
->addr2
;
902 printer(arg
, "%q", ovp
->value
);
903 if ((ovp
= ovp
->next
) == NULL
)
905 printer(arg
, "\t\t# (from %s)\n%s ",
906 ovp
->source
, opt
->name
);
909 printer(arg
, "xxx # [don't know how to print value]");
914 printer(arg
, "# %s value (type %d??)", opt
->name
, opt
->type
);
917 printer(arg
, "\t\t# (from %s)\n", mainopt
->source
);
921 * print_option_list - print out options in effect from an
925 print_option_list(opt
, printer
, arg
)
927 void (*printer
) __P((void *, char *, ...));
930 while (opt
->name
!= NULL
) {
931 if (opt
->priority
!= OPRIO_DEFAULT
932 && opt
->winner
!= (short int) -1)
933 print_option(opt
+ opt
->winner
, opt
, printer
, arg
);
936 } while (opt
->flags
& OPT_PRIOSUB
);
941 * print_options - print out what options are in effect.
944 print_options(printer
, arg
)
945 void (*printer
) __P((void *, char *, ...));
948 struct option_list
*list
;
951 printer(arg
, "pppd options in effect:\n");
952 print_option_list(general_options
, printer
, arg
);
953 print_option_list(auth_options
, printer
, arg
);
954 for (list
= extra_options
; list
!= NULL
; list
= list
->next
)
955 print_option_list(list
->options
, printer
, arg
);
956 print_option_list(the_channel
->options
, printer
, arg
);
957 for (i
= 0; protocols
[i
] != NULL
; ++i
)
958 print_option_list(protocols
[i
]->options
, printer
, arg
);
962 * usage - print out a message telling how to use the program.
967 if (phase
== PHASE_INITIALIZE
)
968 fprintf(stderr
, usage_string
, VERSION
, progname
);
972 * showhelp - print out usage message and exit.
978 if (phase
== PHASE_INITIALIZE
) {
986 * showversion - print out the version number and exit.
992 if (phase
== PHASE_INITIALIZE
) {
993 fprintf(stderr
, "pppd version %s\n", VERSION
);
1000 * option_error - print a message about an error in an option.
1001 * The message is logged, and also sent to
1002 * stderr if phase == PHASE_INITIALIZE.
1005 option_error
__V((char *fmt
, ...))
1010 #if defined(__STDC__)
1011 va_start(args
, fmt
);
1015 fmt
= va_arg(args
, char *);
1017 vslprintf(buf
, sizeof(buf
), fmt
, args
);
1019 if (phase
== PHASE_INITIALIZE
)
1020 fprintf(stderr
, "%s: %s\n", progname
, buf
);
1021 syslog(LOG_ERR
, "%s", buf
);
1026 * Read a word from a file.
1027 * Words are delimited by white-space or by quotes (" or ').
1028 * Quotes, white-space and \ may be escaped with \.
1029 * \<newline> is ignored.
1032 getword(f
, word
, newlinep
, filename
)
1039 int quoted
, comment
;
1040 int value
, digit
, got
, n
;
1042 #define isoctal(c) ((c) >= '0' && (c) < '8')
1050 * First skip white-space and comments.
1058 * A newline means the end of a comment; backslash-newline
1059 * is ignored. Note that we cannot have escape && comment.
1071 * Ignore characters other than newline in a comment.
1077 * If this character is escaped, we have a word start.
1083 * If this is the escape character, look at the next character.
1091 * If this is the start of a comment, ignore the rest of the line.
1099 * A non-whitespace character is the start of a word.
1106 * Save the delimiter for quoted strings.
1108 if (!escape
&& (c
== '"' || c
== '\'')) {
1115 * Process characters until the end of the word.
1120 * This character is escaped: backslash-newline is ignored,
1121 * various other characters indicate particular values
1122 * as for C backslash-escapes.
1157 * \ddd octal sequence
1160 for (n
= 0; n
< 3 && isoctal(c
); ++n
) {
1161 value
= (value
<< 3) + (c
& 07);
1170 * \x<hex_string> sequence
1174 for (n
= 0; n
< 2 && isxdigit(c
); ++n
) {
1175 digit
= toupper(c
) - '0';
1177 digit
+= '0' + 10 - 'A';
1178 value
= (value
<< 4) + digit
;
1186 * Otherwise the character stands for itself.
1193 * Store the resulting character for the escape sequence.
1195 if (len
< MAXWORDLEN
-1)
1206 * Not escaped: see if we've reached the end of the word.
1212 if (isspace(c
) || c
== '#') {
1219 * Backslash starts an escape sequence.
1228 * An ordinary character: store it in the word and get another.
1230 if (len
< MAXWORDLEN
-1)
1238 * End of the word: check for errors.
1244 option_error("Error reading %s: %m", filename
);
1248 * If len is zero, then we didn't find a word before the
1256 * Warn if the word was too long, and append a terminating null.
1258 if (len
>= MAXWORDLEN
) {
1259 option_error("warning: word in file %s too long (%.20s...)",
1261 len
= MAXWORDLEN
- 1;
1272 * number_option - parse an unsigned numeric parameter for an option.
1275 number_option(str
, valp
, base
)
1282 *valp
= strtoul(str
, &ptr
, base
);
1284 option_error("invalid numeric parameter '%s' for %s option",
1285 str
, current_option
);
1293 * int_option - like number_option, but valp is int *,
1294 * the base is assumed to be 0, and *valp is not changed
1295 * if there is an error.
1298 int_option(str
, valp
)
1304 if (!number_option(str
, &v
, 0))
1312 * The following procedures parse options.
1316 * readfile - take commands from a file.
1322 return options_from_file(*argv
, 1, 1, privileged_option
);
1326 * callfile - take commands from /etc/ppp/peers/<name>.
1327 * Name may not contain /../, start with / or ../, or end in /..
1333 char *fname
, *arg
, *p
;
1338 if (arg
[0] == '/' || arg
[0] == 0)
1341 for (p
= arg
; *p
!= 0; ) {
1342 if (p
[0] == '.' && p
[1] == '.' && (p
[2] == '/' || p
[2] == 0)) {
1346 while (*p
!= '/' && *p
!= 0)
1353 option_error("call option value may not contain .. or start with /");
1357 l
= strlen(arg
) + strlen(_PATH_PEERFILES
) + 1;
1358 if ((fname
= (char *) malloc(l
)) == NULL
)
1359 novm("call file name");
1360 slprintf(fname
, l
, "%s%s", _PATH_PEERFILES
, arg
);
1362 ok
= options_from_file(fname
, 1, 1, 1);
1370 * setpassfilter - Set the pass filter for packets
1376 pc
.linktype
= DLT_PPP
;
1377 pc
.snapshot
= PPP_HDRLEN
;
1379 if (pcap_compile(&pc
, &pass_filter
, *argv
, 1, netmask
) == 0)
1381 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc
));
1386 * setactivefilter - Set the active filter for packets
1389 setactivefilter(argv
)
1392 pc
.linktype
= DLT_PPP
;
1393 pc
.snapshot
= PPP_HDRLEN
;
1395 if (pcap_compile(&pc
, &active_filter
, *argv
, 1, netmask
) == 0)
1397 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc
));
1403 * setdomain - Set domain name to append to hostname
1409 gethostname(hostname
, MAXNAMELEN
);
1412 strncat(hostname
, ".", MAXNAMELEN
- strlen(hostname
));
1413 domain
= hostname
+ strlen(hostname
);
1414 strncat(hostname
, *argv
, MAXNAMELEN
- strlen(hostname
));
1416 hostname
[MAXNAMELEN
-1] = 0;
1427 if (!privileged_option
)
1429 fd
= open(*argv
, O_WRONLY
| O_APPEND
| O_CREAT
| O_EXCL
, 0644);
1430 if (fd
< 0 && errno
== EEXIST
)
1431 fd
= open(*argv
, O_WRONLY
| O_APPEND
);
1433 if (!privileged_option
)
1437 option_error("Can't open log file %s: %m", *argv
);
1440 strlcpy(logfile_name
, *argv
, sizeof(logfile_name
));
1441 if (logfile_fd
>= 0)
1457 void (*init
) __P((void));
1461 if (strchr(arg
, '/') == 0) {
1462 const char *base
= _PATH_PLUGIN
;
1463 int l
= strlen(base
) + strlen(arg
) + 2;
1466 novm("plugin file path");
1467 strlcpy(path
, base
, l
);
1468 strlcat(path
, "/", l
);
1469 strlcat(path
, arg
, l
);
1471 handle
= dlopen(path
, RTLD_GLOBAL
| RTLD_NOW
);
1475 option_error("%s", err
);
1476 option_error("Couldn't load plugin %s", arg
);
1479 init
= (void (*)(void))dlsym(handle
, "plugin_init");
1481 option_error("%s has no initialization entry point", arg
);
1484 vers
= (const char *) dlsym(handle
, "pppd_version");
1486 warn("Warning: plugin %s has no version information", arg
);
1487 } else if (strcmp(vers
, VERSION
) != 0) {
1488 option_error("Plugin %s is for pppd version %s, this is %s",
1492 info("Plugin %s loaded.", arg
);