2 * options.c - handles option processing for PPP.
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
20 * prior written permission. For permission or any legal
21 * details, please contact
22 * Office of Technology Transfer
23 * Carnegie Mellon University
25 * Pittsburgh, PA 15213-3890
26 * (412) 268-4387, fax: (412) 268-7395
27 * tech-transfer@andrew.cmu.edu
29 * 4. Redistributions of any form whatsoever must retain the following
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.
43 #define RCSID "$Id: options.c,v 1.94 2004/11/04 09:46:50 paulus Exp $"
61 * DLT_PPP_WITH_DIRECTION is in current libpcap cvs, and should be in
62 * libpcap-0.8.4. Until that is released, use DLT_PPP - but that means
63 * we lose the inbound and outbound qualifiers.
65 #ifndef DLT_PPP_WITH_DIRECTION
66 #define DLT_PPP_WITH_DIRECTION DLT_PPP
71 #include "pathnames.h"
73 #if defined(ultrix) || defined(NeXT)
74 char *strdup __P((char *));
77 static const char rcsid[] = RCSID;
80 struct option_value *next;
86 * Option variables and default values.
88 int debug = 0; /* Debug flag */
89 int kdebugflag = 0; /* Tell kernel to print debug messages */
90 int default_device = 1; /* Using /dev/tty or equivalent */
91 char devnam[MAXPATHLEN]; /* Device name */
92 bool nodetach = 0; /* Don't detach from controlling tty */
93 bool updetach = 0; /* Detach once link is up */
94 int maxconnect = 0; /* Maximum connect time */
95 char user[MAXNAMELEN]; /* Username for PAP */
96 char passwd[MAXSECRETLEN]; /* Password for PAP */
97 bool persist = 0; /* Reopen link after it goes down */
98 char our_name[MAXNAMELEN]; /* Our name for authentication purposes */
99 bool demand = 0; /* do dial-on-demand */
100 char *ipparam = NULL; /* Extra parameter for ip up/down scripts */
101 int idle_time_limit = 0; /* Disconnect if idle for this many seconds */
102 int holdoff = 30; /* # seconds to pause before reconnecting */
103 bool holdoff_specified; /* true if a holdoff value has been given */
104 int log_to_fd = 1; /* send log messages to this fd too */
105 bool log_default = 1; /* log_to_fd is default (stdout) */
106 int maxfail = 10; /* max # of unsuccessful connection attempts */
107 char linkname[MAXPATHLEN]; /* logical name for link */
108 bool tune_kernel; /* may alter kernel settings */
109 int connect_delay = 1000; /* wait this many ms after connect script */
110 int req_unit = -1; /* requested interface unit */
111 bool multilink = 0; /* Enable multilink operation */
112 char *bundle_name = NULL; /* bundle name for multilink */
113 bool dump_options; /* print out option values */
114 bool dryrun; /* print out option values and exit */
115 char *domain; /* domain name set by domain option */
116 int child_wait = 5; /* # seconds to wait for children at exit */
119 unsigned int maxoctets = 0; /* default - no limit */
120 int maxoctets_dir = 0; /* default - sum of traffic */
121 int maxoctets_timeout = 1; /* default 1 second */
125 extern option_t auth_options[];
126 extern struct stat devstat;
129 struct bpf_program pass_filter;/* Filter program for packets to pass */
130 struct bpf_program active_filter; /* Filter program for link-active pkts */
133 char *current_option; /* the name of the option being parsed */
134 int privileged_option; /* set iff the current option came from root */
135 char *option_source; /* string saying where the option came from */
136 int option_priority = OPRIO_CFGFILE; /* priority of the current options */
137 bool devnam_fixed; /* can no longer change device name */
139 static int logfile_fd = -1; /* fd opened for log file */
140 static char logfile_name[MAXPATHLEN]; /* name of log file */
145 static int setdomain __P((char **));
146 static int readfile __P((char **));
147 static int callfile __P((char **));
148 static int showversion __P((char **));
149 static int showhelp __P((char **));
150 static void usage __P((void));
151 static int setlogfile __P((char **));
153 static int loadplugin __P((char **));
157 static int setpassfilter __P((char **));
158 static int setactivefilter __P((char **));
162 static int setmodir __P((char **));
165 static option_t *find_option __P((const char *name));
166 static int process_option __P((option_t *, char *, char **));
167 static int n_arguments __P((option_t *));
168 static int number_option __P((char *, u_int32_t *, int));
171 * Structure to store extra lists of options.
175 struct option_list *next;
178 static struct option_list *extra_options = NULL;
183 option_t general_options[] = {
184 { "debug", o_int, &debug,
185 "Increase debugging level", OPT_INC | OPT_NOARG | 1 },
186 { "-d", o_int, &debug,
187 "Increase debugging level",
188 OPT_ALIAS | OPT_INC | OPT_NOARG | 1 },
190 { "kdebug", o_int, &kdebugflag,
191 "Set kernel driver debug level", OPT_PRIO },
193 { "nodetach", o_bool, &nodetach,
194 "Don't detach from controlling tty", OPT_PRIO | 1 },
195 { "-detach", o_bool, &nodetach,
196 "Don't detach from controlling tty", OPT_ALIAS | OPT_PRIOSUB | 1 },
197 { "updetach", o_bool, &updetach,
198 "Detach from controlling tty once link is up",
199 OPT_PRIOSUB | OPT_A2CLR | 1, &nodetach },
201 { "holdoff", o_int, &holdoff,
202 "Set time in seconds before retrying connection", OPT_PRIO },
204 { "idle", o_int, &idle_time_limit,
205 "Set time in seconds before disconnecting idle link", OPT_PRIO },
207 { "maxconnect", o_int, &maxconnect,
208 "Set connection time limit",
209 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
211 { "domain", o_special, (void *)setdomain,
212 "Add given domain name to hostname",
213 OPT_PRIO | OPT_PRIV | OPT_A2STRVAL, &domain },
215 { "file", o_special, (void *)readfile,
216 "Take options from a file", OPT_NOPRINT },
217 { "call", o_special, (void *)callfile,
218 "Take options from a privileged file", OPT_NOPRINT },
220 { "persist", o_bool, &persist,
221 "Keep on reopening connection after close", OPT_PRIO | 1 },
222 { "nopersist", o_bool, &persist,
223 "Turn off persist option", OPT_PRIOSUB },
225 { "demand", o_bool, &demand,
226 "Dial on demand", OPT_INITONLY | 1, &persist },
228 { "--version", o_special_noarg, (void *)showversion,
229 "Show version number" },
230 { "--help", o_special_noarg, (void *)showhelp,
231 "Show brief listing of options" },
232 { "-h", o_special_noarg, (void *)showhelp,
233 "Show brief listing of options", OPT_ALIAS },
235 { "logfile", o_special, (void *)setlogfile,
236 "Append log messages to this file",
237 OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, &logfile_name },
238 { "logfd", o_int, &log_to_fd,
239 "Send log messages to this file descriptor",
240 OPT_PRIOSUB | OPT_A2CLR, &log_default },
241 { "nolog", o_int, &log_to_fd,
242 "Don't send log messages to any file",
243 OPT_PRIOSUB | OPT_NOARG | OPT_VAL(-1) },
244 { "nologfd", o_int, &log_to_fd,
245 "Don't send log messages to any file descriptor",
246 OPT_PRIOSUB | OPT_ALIAS | OPT_NOARG | OPT_VAL(-1) },
248 { "linkname", o_string, linkname,
249 "Set logical name for link",
250 OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXPATHLEN },
252 { "maxfail", o_int, &maxfail,
253 "Maximum number of unsuccessful connection attempts to allow",
256 { "ktune", o_bool, &tune_kernel,
257 "Alter kernel settings as necessary", OPT_PRIO | 1 },
258 { "noktune", o_bool, &tune_kernel,
259 "Don't alter kernel settings", OPT_PRIOSUB },
261 { "connect-delay", o_int, &connect_delay,
262 "Maximum time (in ms) to wait after connect script finishes",
265 { "unit", o_int, &req_unit,
266 "PPP interface unit number to use if possible",
267 OPT_PRIO | OPT_LLIMIT, 0, 0 },
269 { "dump", o_bool, &dump_options,
270 "Print out option values after parsing all options", 1 },
271 { "dryrun", o_bool, &dryrun,
272 "Stop after parsing, printing, and checking options", 1 },
274 { "child-timeout", o_int, &child_wait,
275 "Number of seconds to wait for child processes at exit" },
277 #ifdef HAVE_MULTILINK
278 { "multilink", o_bool, &multilink,
279 "Enable multilink operation", OPT_PRIO | 1 },
280 { "mp", o_bool, &multilink,
281 "Enable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 1 },
282 { "nomultilink", o_bool, &multilink,
283 "Disable multilink operation", OPT_PRIOSUB | 0 },
284 { "nomp", o_bool, &multilink,
285 "Disable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 0 },
287 { "bundle", o_string, &bundle_name,
288 "Bundle name for multilink", OPT_PRIO },
289 #endif /* HAVE_MULTILINK */
292 { "plugin", o_special, (void *)loadplugin,
293 "Load a plug-in module into pppd", OPT_PRIV | OPT_A2LIST },
297 { "pass-filter", 1, setpassfilter,
298 "set filter for packets to pass", OPT_PRIO },
300 { "active-filter", 1, setactivefilter,
301 "set filter for active pkts", OPT_PRIO },
305 { "maxoctets", o_int, &maxoctets,
306 "Set connection traffic limit",
307 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
308 { "mo", o_int, &maxoctets,
309 "Set connection traffic limit",
310 OPT_ALIAS | OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
311 { "mo-direction", o_special, setmodir,
312 "Set direction for limit traffic (sum,in,out,max)" },
313 { "mo-timeout", o_int, &maxoctets_timeout,
314 "Check for traffic limit every N seconds", OPT_PRIO | OPT_LLIMIT | 1 },
320 #ifndef IMPLEMENTATION
321 #define IMPLEMENTATION ""
324 static char *usage_string = "\
326 Usage: %s [ options ], where options are:\n\
327 <device> Communicate over the named device\n\
328 <speed> Set the baud rate to <speed>\n\
329 <loc>:<rem> Set the local and/or remote interface IP\n\
330 addresses. Either one may be omitted.\n\
331 asyncmap <n> Set the desired async map to hex <n>\n\
332 auth Require authentication from peer\n\
333 connect <p> Invoke shell command <p> to set up the serial line\n\
334 crtscts Use hardware RTS/CTS flow control\n\
335 defaultroute Add default route through interface\n\
336 file <f> Take options from file <f>\n\
337 modem Use modem control lines\n\
338 mru <n> Set MRU value to <n> for negotiation\n\
339 See pppd(8) for more options.\n\
343 * parse_args - parse a string of arguments from the command line.
346 parse_args(argc, argv)
354 privileged_option = privileged;
355 option_source = "command line";
356 option_priority = OPRIO_CMDLINE;
360 opt = find_option(arg);
362 option_error("unrecognized option '%s'", arg);
366 n = n_arguments(opt);
368 option_error("too few parameters for option %s", arg);
371 if (!process_option(opt, arg, argv))
380 * options_from_file - Read a string of options from a file,
381 * and interpret them.
384 options_from_file(filename, must_exist, check_prot, priv)
391 int i, newline, ret, err;
396 char args[MAXARGS][MAXWORDLEN];
397 char cmd[MAXWORDLEN];
401 f = fopen(filename, "r");
408 if (err != ENOENT && err != ENOTDIR)
409 warn("Warning: can't open options file %s: %m", filename);
412 option_error("Can't open options file %s: %m", filename);
416 oldpriv = privileged_option;
417 privileged_option = priv;
418 oldsource = option_source;
419 option_source = strdup(filename);
420 if (option_source == NULL)
421 option_source = "file";
423 while (getword(f, cmd, &newline, filename)) {
424 opt = find_option(cmd);
426 option_error("In file %s: unrecognized option '%s'",
430 n = n_arguments(opt);
431 for (i = 0; i < n; ++i) {
432 if (!getword(f, args[i], &newline, filename)) {
434 "In file %s: too few parameters for option '%s'",
440 if (!process_option(opt, cmd, argv))
447 privileged_option = oldpriv;
448 option_source = oldsource;
453 * options_from_user - See if the use has a ~/.ppprc file,
454 * and if so, interpret options from it.
459 char *user, *path, *file;
464 pw = getpwuid(getuid());
465 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
467 file = _PATH_USEROPT;
468 pl = strlen(user) + strlen(file) + 2;
471 novm("init file name");
472 slprintf(path, pl, "%s/%s", user, file);
473 option_priority = OPRIO_CFGFILE;
474 ret = options_from_file(path, 0, 1, privileged);
480 * options_for_tty - See if an options file exists for the serial
481 * device, and if so, interpret options from it.
482 * We only allow the per-tty options file to override anything from
483 * the command line if it is something that the user can't override
484 * once it has been set by root; this is done by giving configuration
485 * files a lower priority than the command line.
490 char *dev, *path, *p;
495 if ((p = strstr(dev, "/dev/")) != NULL)
497 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
498 return 1; /* don't look for /etc/ppp/options.tty */
499 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
502 novm("tty init file name");
503 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
504 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
505 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
508 option_priority = OPRIO_CFGFILE;
509 ret = options_from_file(path, 0, 0, 1);
515 * options_from_list - process a string of options in a wordlist.
518 options_from_list(w, priv)
527 privileged_option = priv;
528 option_source = "secrets file";
529 option_priority = OPRIO_SECFILE;
532 opt = find_option(w->word);
534 option_error("In secrets file: unrecognized option '%s'",
538 n = n_arguments(opt);
540 for (i = 0; i < n; ++i) {
544 "In secrets file: too few parameters for option '%s'",
550 if (!process_option(opt, w0->word, argv))
561 * match_option - see if this option matches an option_t structure.
564 match_option(name, opt, dowild)
569 int (*match) __P((char *, char **, int));
571 if (dowild != (opt->type == o_wild))
574 return strcmp(name, opt->name) == 0;
575 match = (int (*) __P((char *, char **, int))) opt->addr;
576 return (*match)(name, NULL, 0);
580 * find_option - scan the option lists for the various protocols
581 * looking for an entry with the given name.
582 * This could be optimized by using a hash table.
589 struct option_list *list;
592 for (dowild = 0; dowild <= 1; ++dowild) {
593 for (opt = general_options; opt->name != NULL; ++opt)
594 if (match_option(name, opt, dowild))
596 for (opt = auth_options; opt->name != NULL; ++opt)
597 if (match_option(name, opt, dowild))
599 for (list = extra_options; list != NULL; list = list->next)
600 for (opt = list->options; opt->name != NULL; ++opt)
601 if (match_option(name, opt, dowild))
603 for (opt = the_channel->options; opt->name != NULL; ++opt)
604 if (match_option(name, opt, dowild))
606 for (i = 0; protocols[i] != NULL; ++i)
607 if ((opt = protocols[i]->options) != NULL)
608 for (; opt->name != NULL; ++opt)
609 if (match_option(name, opt, dowild))
616 * process_option - process one new-style option.
619 process_option(opt, cmd, argv)
627 int (*parser) __P((char **));
628 int (*wildp) __P((char *, char **, int));
629 char *optopt = (opt->type == o_wild)? "": " option";
630 int prio = option_priority;
631 option_t *mainopt = opt;
633 current_option = opt->name;
634 if ((opt->flags & OPT_PRIVFIX) && privileged_option)
636 while (mainopt->flags & OPT_PRIOSUB)
638 if (mainopt->flags & OPT_PRIO) {
639 if (prio < mainopt->priority) {
640 /* new value doesn't override old */
641 if (prio == OPRIO_CMDLINE && mainopt->priority > OPRIO_ROOT) {
642 option_error("%s%s set in %s cannot be overridden\n",
643 opt->name, optopt, mainopt->source);
648 if (prio > OPRIO_ROOT && mainopt->priority == OPRIO_CMDLINE)
649 warn("%s%s from %s overrides command line",
650 opt->name, optopt, option_source);
653 if ((opt->flags & OPT_INITONLY) && phase != PHASE_INITIALIZE) {
654 option_error("%s%s cannot be changed after initialization",
658 if ((opt->flags & OPT_PRIV) && !privileged_option) {
659 option_error("using the %s%s requires root privilege",
663 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
664 option_error("%s%s is disabled", opt->name, optopt);
667 if ((opt->flags & OPT_DEVEQUIV) && devnam_fixed) {
668 option_error("the %s%s may not be changed in %s",
669 opt->name, optopt, option_source);
675 v = opt->flags & OPT_VALUE;
676 *(bool *)(opt->addr) = v;
677 if (opt->addr2 && (opt->flags & OPT_A2COPY))
678 *(bool *)(opt->addr2) = v;
679 else if (opt->addr2 && (opt->flags & OPT_A2CLR))
680 *(bool *)(opt->addr2) = 0;
681 else if (opt->addr2 && (opt->flags & OPT_A2CLRB))
682 *(u_char *)(opt->addr2) &= ~v;
683 else if (opt->addr2 && (opt->flags & OPT_A2OR))
684 *(u_char *)(opt->addr2) |= v;
689 if ((opt->flags & OPT_NOARG) == 0) {
690 if (!int_option(*argv, &iv))
692 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
693 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
694 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
695 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
696 switch (opt->flags & OPT_LIMITS) {
698 option_error("%s value must be%s >= %d",
699 opt->name, zok, opt->lower_limit);
702 option_error("%s value must be%s <= %d",
703 opt->name, zok, opt->upper_limit);
706 option_error("%s value must be%s between %d and %d",
707 opt->name, zok, opt->lower_limit, opt->upper_limit);
713 a = opt->flags & OPT_VALUE;
715 a -= 256; /* sign extend */
717 if (opt->flags & OPT_INC)
718 iv += *(int *)(opt->addr);
719 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
720 int oldv = *(int *)(opt->addr);
721 if ((opt->flags & OPT_ZEROINF) ?
722 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
723 option_error("%s value cannot be increased", opt->name);
727 *(int *)(opt->addr) = iv;
728 if (opt->addr2 && (opt->flags & OPT_A2COPY))
729 *(int *)(opt->addr2) = iv;
733 if (opt->flags & OPT_NOARG) {
734 v = opt->flags & OPT_VALUE;
737 } else if (!number_option(*argv, &v, 16))
739 if (opt->flags & OPT_OR)
740 v |= *(u_int32_t *)(opt->addr);
741 *(u_int32_t *)(opt->addr) = v;
742 if (opt->addr2 && (opt->flags & OPT_A2COPY))
743 *(u_int32_t *)(opt->addr2) = v;
747 if (opt->flags & OPT_STATIC) {
748 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
752 novm("option argument");
753 *(char **)(opt->addr) = sv;
757 case o_special_noarg:
759 parser = (int (*) __P((char **))) opt->addr;
760 if (!(*parser)(argv))
762 if (opt->flags & OPT_A2LIST) {
763 struct option_value *ovp, **pp;
765 ovp = malloc(sizeof(*ovp) + strlen(*argv));
767 strcpy(ovp->value, *argv);
768 ovp->source = option_source;
770 pp = (struct option_value **) &opt->addr2;
779 wildp = (int (*) __P((char *, char **, int))) opt->addr;
780 if (!(*wildp)(cmd, argv, 1))
785 if (opt->addr2 && (opt->flags & (OPT_A2COPY|OPT_ENABLE
786 |OPT_A2PRINTER|OPT_A2STRVAL|OPT_A2LIST|OPT_A2OR)) == 0)
787 *(bool *)(opt->addr2) = !(opt->flags & OPT_A2CLR);
789 mainopt->source = option_source;
790 mainopt->priority = prio;
791 mainopt->winner = opt - mainopt;
797 * override_value - if the option priorities would permit us to
798 * override the value of option, return 1 and update the priority
799 * and source of the option value. Otherwise returns 0.
802 override_value(option, priority, source)
809 opt = find_option(option);
812 while (opt->flags & OPT_PRIOSUB)
814 if ((opt->flags & OPT_PRIO) && priority < opt->priority)
816 opt->priority = priority;
817 opt->source = source;
823 * n_arguments - tell how many arguments an option takes
829 return (opt->type == o_bool || opt->type == o_special_noarg
830 || (opt->flags & OPT_NOARG))? 0: 1;
834 * add_options - add a list of options to the set we grok.
840 struct option_list *list;
842 list = malloc(sizeof(*list));
844 novm("option list entry");
846 list->next = extra_options;
847 extra_options = list;
851 * check_options - check that options are valid and consistent.
856 if (logfile_fd >= 0 && logfile_fd != log_to_fd)
861 * print_option - print out an option and its value
864 print_option(opt, mainopt, printer, arg)
865 option_t *opt, *mainopt;
866 void (*printer) __P((void *, char *, ...));
872 if (opt->flags & OPT_NOPRINT)
876 v = opt->flags & OPT_VALUE;
877 if (*(bool *)opt->addr != v)
878 /* this can happen legitimately, e.g. lock
879 option turned off for default device */
881 printer(arg, "%s", opt->name);
884 v = opt->flags & OPT_VALUE;
887 i = *(int *)opt->addr;
888 if (opt->flags & OPT_NOARG) {
889 printer(arg, "%s", opt->name);
891 if (opt->flags & OPT_INC) {
892 for (; i > v; i -= v)
893 printer(arg, " %s", opt->name);
895 printer(arg, " # oops: %d not %d\n",
899 printer(arg, "%s %d", opt->name, i);
903 printer(arg, "%s", opt->name);
904 if ((opt->flags & OPT_NOARG) == 0)
905 printer(arg, " %x", *(u_int32_t *)opt->addr);
909 if (opt->flags & OPT_HIDE) {
912 p = (char *) opt->addr;
913 if ((opt->flags & OPT_STATIC) == 0)
916 printer(arg, "%s %q", opt->name, p);
920 case o_special_noarg:
922 if (opt->type != o_wild) {
923 printer(arg, "%s", opt->name);
924 if (n_arguments(opt) == 0)
928 if (opt->flags & OPT_A2PRINTER) {
929 void (*oprt) __P((option_t *,
930 void ((*)__P((void *, char *, ...))),
932 oprt = (void (*) __P((option_t *,
933 void ((*)__P((void *, char *, ...))),
935 (*oprt)(opt, printer, arg);
936 } else if (opt->flags & OPT_A2STRVAL) {
937 p = (char *) opt->addr2;
938 if ((opt->flags & OPT_STATIC) == 0)
941 } else if (opt->flags & OPT_A2LIST) {
942 struct option_value *ovp;
944 ovp = (struct option_value *) opt->addr2;
946 printer(arg, "%q", ovp->value);
947 if ((ovp = ovp->next) == NULL)
949 printer(arg, "\t\t# (from %s)\n%s ",
950 ovp->source, opt->name);
953 printer(arg, "xxx # [don't know how to print value]");
958 printer(arg, "# %s value (type %d\?\?)", opt->name, opt->type);
961 printer(arg, "\t\t# (from %s)\n", mainopt->source);
965 * print_option_list - print out options in effect from an
969 print_option_list(opt, printer, arg)
971 void (*printer) __P((void *, char *, ...));
974 while (opt->name != NULL) {
975 if (opt->priority != OPRIO_DEFAULT
976 && opt->winner != (short int) -1)
977 print_option(opt + opt->winner, opt, printer, arg);
980 } while (opt->flags & OPT_PRIOSUB);
985 * print_options - print out what options are in effect.
988 print_options(printer, arg)
989 void (*printer) __P((void *, char *, ...));
992 struct option_list *list;
995 printer(arg, "pppd options in effect:\n");
996 print_option_list(general_options, printer, arg);
997 print_option_list(auth_options, printer, arg);
998 for (list = extra_options; list != NULL; list = list->next)
999 print_option_list(list->options, printer, arg);
1000 print_option_list(the_channel->options, printer, arg);
1001 for (i = 0; protocols[i] != NULL; ++i)
1002 print_option_list(protocols[i]->options, printer, arg);
1006 * usage - print out a message telling how to use the program.
1011 if (phase == PHASE_INITIALIZE)
1012 fprintf(stderr, usage_string, VERSION, progname);
1016 * showhelp - print out usage message and exit.
1022 if (phase == PHASE_INITIALIZE) {
1030 * showversion - print out the version number and exit.
1036 if (phase == PHASE_INITIALIZE) {
1037 fprintf(stderr, "pppd version %s\n", VERSION);
1044 * option_error - print a message about an error in an option.
1045 * The message is logged, and also sent to
1046 * stderr if phase == PHASE_INITIALIZE.
1049 option_error __V((char *fmt, ...))
1054 #if defined(__STDC__)
1055 va_start(args, fmt);
1059 fmt = va_arg(args, char *);
1061 vslprintf(buf, sizeof(buf), fmt, args);
1063 if (phase == PHASE_INITIALIZE)
1064 fprintf(stderr, "%s: %s\n", progname, buf);
1065 syslog(LOG_ERR, "%s", buf);
1070 * readable - check if a file is readable by the real user.
1083 if (fstat(fd, &sbuf) != 0)
1085 if (sbuf.st_uid == uid)
1086 return sbuf.st_mode & S_IRUSR;
1087 if (sbuf.st_gid == getgid())
1088 return sbuf.st_mode & S_IRGRP;
1089 for (i = 0; i < ngroups; ++i)
1090 if (sbuf.st_gid == groups[i])
1091 return sbuf.st_mode & S_IRGRP;
1092 return sbuf.st_mode & S_IROTH;
1097 * Read a word from a file.
1098 * Words are delimited by white-space or by quotes (" or ').
1099 * Quotes, white-space and \ may be escaped with \.
1100 * \<newline> is ignored.
1103 getword(f, word, newlinep, filename)
1110 int quoted, comment;
1111 int value, digit, got, n;
1113 #define isoctal(c) ((c) >= '0' && (c) < '8')
1121 * First skip white-space and comments.
1129 * A newline means the end of a comment; backslash-newline
1130 * is ignored. Note that we cannot have escape && comment.
1142 * Ignore characters other than newline in a comment.
1148 * If this character is escaped, we have a word start.
1154 * If this is the escape character, look at the next character.
1162 * If this is the start of a comment, ignore the rest of the line.
1170 * A non-whitespace character is the start of a word.
1177 * Save the delimiter for quoted strings.
1179 if (!escape && (c == '"' || c == '\'')) {
1186 * Process characters until the end of the word.
1191 * This character is escaped: backslash-newline is ignored,
1192 * various other characters indicate particular values
1193 * as for C backslash-escapes.
1228 * \ddd octal sequence
1231 for (n = 0; n < 3 && isoctal(c); ++n) {
1232 value = (value << 3) + (c & 07);
1241 * \x<hex_string> sequence
1245 for (n = 0; n < 2 && isxdigit(c); ++n) {
1246 digit = toupper(c) - '0';
1248 digit += '0' + 10 - 'A';
1249 value = (value << 4) + digit;
1257 * Otherwise the character stands for itself.
1264 * Store the resulting character for the escape sequence.
1266 if (len < MAXWORDLEN-1)
1277 * Not escaped: see if we've reached the end of the word.
1283 if (isspace(c) || c == '#') {
1290 * Backslash starts an escape sequence.
1299 * An ordinary character: store it in the word and get another.
1301 if (len < MAXWORDLEN-1)
1309 * End of the word: check for errors.
1315 option_error("Error reading %s: %m", filename);
1319 * If len is zero, then we didn't find a word before the
1327 * Warn if the word was too long, and append a terminating null.
1329 if (len >= MAXWORDLEN) {
1330 option_error("warning: word in file %s too long (%.20s...)",
1332 len = MAXWORDLEN - 1;
1343 * number_option - parse an unsigned numeric parameter for an option.
1346 number_option(str, valp, base)
1353 *valp = strtoul(str, &ptr, base);
1355 option_error("invalid numeric parameter '%s' for %s option",
1356 str, current_option);
1364 * int_option - like number_option, but valp is int *,
1365 * the base is assumed to be 0, and *valp is not changed
1366 * if there is an error.
1369 int_option(str, valp)
1375 if (!number_option(str, &v, 0))
1383 * The following procedures parse options.
1387 * readfile - take commands from a file.
1393 return options_from_file(*argv, 1, 1, privileged_option);
1397 * callfile - take commands from /etc/ppp/peers/<name>.
1398 * Name may not contain /../, start with / or ../, or end in /..
1404 char *fname, *arg, *p;
1409 if (arg[0] == '/' || arg[0] == 0)
1412 for (p = arg; *p != 0; ) {
1413 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1417 while (*p != '/' && *p != 0)
1424 option_error("call option value may not contain .. or start with /");
1428 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1429 if ((fname = (char *) malloc(l)) == NULL)
1430 novm("call file name");
1431 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1433 ok = options_from_file(fname, 1, 1, 1);
1441 * setpassfilter - Set the pass filter for packets
1450 pc = pcap_open_dead(DLT_PPP_WITH_DIRECTION, 65535);
1451 if (pcap_compile(pc, &pass_filter, *argv, 1, netmask) == -1) {
1452 option_error("error in pass-filter expression: %s\n",
1462 * setactivefilter - Set the active filter for packets
1465 setactivefilter(argv)
1471 pc = pcap_open_dead(DLT_PPP_WITH_DIRECTION, 65535);
1472 if (pcap_compile(pc, &active_filter, *argv, 1, netmask) == -1) {
1473 option_error("error in active-filter expression: %s\n",
1484 * setdomain - Set domain name to append to hostname
1490 gethostname(hostname, MAXNAMELEN);
1493 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1494 domain = hostname + strlen(hostname);
1495 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1497 hostname[MAXNAMELEN-1] = 0;
1507 if (!privileged_option)
1509 fd = open(*argv, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0644);
1510 if (fd < 0 && errno == EEXIST)
1511 fd = open(*argv, O_WRONLY | O_APPEND);
1513 if (!privileged_option)
1517 option_error("Can't open log file %s: %m", *argv);
1520 strlcpy(logfile_name, *argv, sizeof(logfile_name));
1521 if (logfile_fd >= 0)
1536 if(!strcmp(*argv,"in")) {
1537 maxoctets_dir = PPP_OCTETS_DIRECTION_IN;
1538 } else if (!strcmp(*argv,"out")) {
1539 maxoctets_dir = PPP_OCTETS_DIRECTION_OUT;
1540 } else if (!strcmp(*argv,"max")) {
1541 maxoctets_dir = PPP_OCTETS_DIRECTION_MAXOVERAL;
1543 maxoctets_dir = PPP_OCTETS_DIRECTION_SUM;
1557 void (*init) __P((void));
1561 if (strchr(arg, '/') == 0) {
1562 const char *base = _PATH_PLUGIN;
1563 int l = strlen(base) + strlen(arg) + 2;
1566 novm("plugin file path");
1567 strlcpy(path, base, l);
1568 strlcat(path, "/", l);
1569 strlcat(path, arg, l);
1571 handle = dlopen(path, RTLD_GLOBAL | RTLD_NOW);
1575 option_error("%s", err);
1576 option_error("Couldn't load plugin %s", arg);
1579 init = (void (*)(void))dlsym(handle, "plugin_init");
1581 option_error("%s has no initialization entry point", arg);
1584 vers = (const char *) dlsym(handle, "pppd_version");
1586 warn("Warning: plugin %s has no version information", arg);
1587 } else if (strcmp(vers, VERSION) != 0) {
1588 option_error("Plugin %s is for pppd version %s, this is %s",
1589 arg, vers, VERSION);
1592 info("Plugin %s loaded.", arg);