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 1.96 2004/12/31 06:19:27 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_WITHDIRECTION
66 #define DLT_PPP_WITHDIRECTION 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",
203 OPT_PRIO, &holdoff_specified },
205 { "idle", o_int, &idle_time_limit,
206 "Set time in seconds before disconnecting idle link", OPT_PRIO },
208 { "maxconnect", o_int, &maxconnect,
209 "Set connection time limit",
210 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
212 { "domain", o_special, (void *)setdomain,
213 "Add given domain name to hostname",
214 OPT_PRIO | OPT_PRIV | OPT_A2STRVAL, &domain },
216 { "file", o_special, (void *)readfile,
217 "Take options from a file", OPT_NOPRINT },
218 { "call", o_special, (void *)callfile,
219 "Take options from a privileged file", OPT_NOPRINT },
221 { "persist", o_bool, &persist,
222 "Keep on reopening connection after close", OPT_PRIO | 1 },
223 { "nopersist", o_bool, &persist,
224 "Turn off persist option", OPT_PRIOSUB },
226 { "demand", o_bool, &demand,
227 "Dial on demand", OPT_INITONLY | 1, &persist },
229 { "--version", o_special_noarg, (void *)showversion,
230 "Show version number" },
231 { "--help", o_special_noarg, (void *)showhelp,
232 "Show brief listing of options" },
233 { "-h", o_special_noarg, (void *)showhelp,
234 "Show brief listing of options", OPT_ALIAS },
236 { "logfile", o_special, (void *)setlogfile,
237 "Append log messages to this file",
238 OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, &logfile_name },
239 { "logfd", o_int, &log_to_fd,
240 "Send log messages to this file descriptor",
241 OPT_PRIOSUB | OPT_A2CLR, &log_default },
242 { "nolog", o_int, &log_to_fd,
243 "Don't send log messages to any file",
244 OPT_PRIOSUB | OPT_NOARG | OPT_VAL(-1) },
245 { "nologfd", o_int, &log_to_fd,
246 "Don't send log messages to any file descriptor",
247 OPT_PRIOSUB | OPT_ALIAS | OPT_NOARG | OPT_VAL(-1) },
249 { "linkname", o_string, linkname,
250 "Set logical name for link",
251 OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXPATHLEN },
253 { "maxfail", o_int, &maxfail,
254 "Maximum number of unsuccessful connection attempts to allow",
257 { "ktune", o_bool, &tune_kernel,
258 "Alter kernel settings as necessary", OPT_PRIO | 1 },
259 { "noktune", o_bool, &tune_kernel,
260 "Don't alter kernel settings", OPT_PRIOSUB },
262 { "connect-delay", o_int, &connect_delay,
263 "Maximum time (in ms) to wait after connect script finishes",
266 { "unit", o_int, &req_unit,
267 "PPP interface unit number to use if possible",
268 OPT_PRIO | OPT_LLIMIT, 0, 0 },
270 { "dump", o_bool, &dump_options,
271 "Print out option values after parsing all options", 1 },
272 { "dryrun", o_bool, &dryrun,
273 "Stop after parsing, printing, and checking options", 1 },
275 { "child-timeout", o_int, &child_wait,
276 "Number of seconds to wait for child processes at exit",
279 #ifdef HAVE_MULTILINK
280 { "multilink", o_bool, &multilink,
281 "Enable multilink operation", OPT_PRIO | 1 },
282 { "mp", o_bool, &multilink,
283 "Enable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 1 },
284 { "nomultilink", o_bool, &multilink,
285 "Disable multilink operation", OPT_PRIOSUB | 0 },
286 { "nomp", o_bool, &multilink,
287 "Disable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 0 },
289 { "bundle", o_string, &bundle_name,
290 "Bundle name for multilink", OPT_PRIO },
291 #endif /* HAVE_MULTILINK */
294 { "plugin", o_special, (void *)loadplugin,
295 "Load a plug-in module into pppd", OPT_PRIV | OPT_A2LIST },
299 { "pass-filter", 1, setpassfilter,
300 "set filter for packets to pass", OPT_PRIO },
302 { "active-filter", 1, setactivefilter,
303 "set filter for active pkts", OPT_PRIO },
307 { "maxoctets", o_int, &maxoctets,
308 "Set connection traffic limit",
309 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
310 { "mo", o_int, &maxoctets,
311 "Set connection traffic limit",
312 OPT_ALIAS | OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
313 { "mo-direction", o_special, setmodir,
314 "Set direction for limit traffic (sum,in,out,max)" },
315 { "mo-timeout", o_int, &maxoctets_timeout,
316 "Check for traffic limit every N seconds", OPT_PRIO | OPT_LLIMIT | 1 },
322 #ifndef IMPLEMENTATION
323 #define IMPLEMENTATION ""
326 static char *usage_string = "\
328 Usage: %s [ options ], where options are:\n\
329 <device> Communicate over the named device\n\
330 <speed> Set the baud rate to <speed>\n\
331 <loc>:<rem> Set the local and/or remote interface IP\n\
332 addresses. Either one may be omitted.\n\
333 asyncmap <n> Set the desired async map to hex <n>\n\
334 auth Require authentication from peer\n\
335 connect <p> Invoke shell command <p> to set up the serial line\n\
336 crtscts Use hardware RTS/CTS flow control\n\
337 defaultroute Add default route through interface\n\
338 file <f> Take options from file <f>\n\
339 modem Use modem control lines\n\
340 mru <n> Set MRU value to <n> for negotiation\n\
341 See pppd(8) for more options.\n\
345 * parse_args - parse a string of arguments from the command line.
348 parse_args(argc, argv)
356 privileged_option = privileged;
357 option_source = "command line";
358 option_priority = OPRIO_CMDLINE;
362 opt = find_option(arg);
364 option_error("unrecognized option '%s'", arg);
368 n = n_arguments(opt);
370 option_error("too few parameters for option %s", arg);
373 if (!process_option(opt, arg, argv))
382 * options_from_file - Read a string of options from a file,
383 * and interpret them.
386 options_from_file(filename, must_exist, check_prot, priv)
393 int i, newline, ret, err;
398 char args[MAXARGS][MAXWORDLEN];
399 char cmd[MAXWORDLEN];
403 f = fopen(filename, "r");
410 if (err != ENOENT && err != ENOTDIR)
411 warn("Warning: can't open options file %s: %m", filename);
414 option_error("Can't open options file %s: %m", filename);
418 oldpriv = privileged_option;
419 privileged_option = priv;
420 oldsource = option_source;
421 option_source = strdup(filename);
422 if (option_source == NULL)
423 option_source = "file";
425 while (getword(f, cmd, &newline, filename)) {
426 opt = find_option(cmd);
428 option_error("In file %s: unrecognized option '%s'",
432 n = n_arguments(opt);
433 for (i = 0; i < n; ++i) {
434 if (!getword(f, args[i], &newline, filename)) {
436 "In file %s: too few parameters for option '%s'",
442 if (!process_option(opt, cmd, argv))
449 privileged_option = oldpriv;
450 option_source = oldsource;
455 * options_from_user - See if the use has a ~/.ppprc file,
456 * and if so, interpret options from it.
461 char *user, *path, *file;
466 pw = getpwuid(getuid());
467 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
469 file = _PATH_USEROPT;
470 pl = strlen(user) + strlen(file) + 2;
473 novm("init file name");
474 slprintf(path, pl, "%s/%s", user, file);
475 option_priority = OPRIO_CFGFILE;
476 ret = options_from_file(path, 0, 1, privileged);
482 * options_for_tty - See if an options file exists for the serial
483 * device, and if so, interpret options from it.
484 * We only allow the per-tty options file to override anything from
485 * the command line if it is something that the user can't override
486 * once it has been set by root; this is done by giving configuration
487 * files a lower priority than the command line.
492 char *dev, *path, *p;
497 if ((p = strstr(dev, "/dev/")) != NULL)
499 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
500 return 1; /* don't look for /etc/ppp/options.tty */
501 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
504 novm("tty init file name");
505 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
506 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
507 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
510 option_priority = OPRIO_CFGFILE;
511 ret = options_from_file(path, 0, 0, 1);
517 * options_from_list - process a string of options in a wordlist.
520 options_from_list(w, priv)
529 privileged_option = priv;
530 option_source = "secrets file";
531 option_priority = OPRIO_SECFILE;
534 opt = find_option(w->word);
536 option_error("In secrets file: unrecognized option '%s'",
540 n = n_arguments(opt);
542 for (i = 0; i < n; ++i) {
546 "In secrets file: too few parameters for option '%s'",
552 if (!process_option(opt, w0->word, argv))
563 * match_option - see if this option matches an option_t structure.
566 match_option(name, opt, dowild)
571 int (*match) __P((char *, char **, int));
573 if (dowild != (opt->type == o_wild))
576 return strcmp(name, opt->name) == 0;
577 match = (int (*) __P((char *, char **, int))) opt->addr;
578 return (*match)(name, NULL, 0);
582 * find_option - scan the option lists for the various protocols
583 * looking for an entry with the given name.
584 * This could be optimized by using a hash table.
591 struct option_list *list;
594 for (dowild = 0; dowild <= 1; ++dowild) {
595 for (opt = general_options; opt->name != NULL; ++opt)
596 if (match_option(name, opt, dowild))
598 for (opt = auth_options; opt->name != NULL; ++opt)
599 if (match_option(name, opt, dowild))
601 for (list = extra_options; list != NULL; list = list->next)
602 for (opt = list->options; opt->name != NULL; ++opt)
603 if (match_option(name, opt, dowild))
605 for (opt = the_channel->options; opt->name != NULL; ++opt)
606 if (match_option(name, opt, dowild))
608 for (i = 0; protocols[i] != NULL; ++i)
609 if ((opt = protocols[i]->options) != NULL)
610 for (; opt->name != NULL; ++opt)
611 if (match_option(name, opt, dowild))
618 * process_option - process one new-style option.
621 process_option(opt, cmd, argv)
629 int (*parser) __P((char **));
630 int (*wildp) __P((char *, char **, int));
631 char *optopt = (opt->type == o_wild)? "": " option";
632 int prio = option_priority;
633 option_t *mainopt = opt;
635 current_option = opt->name;
636 if ((opt->flags & OPT_PRIVFIX) && privileged_option)
638 while (mainopt->flags & OPT_PRIOSUB)
640 if (mainopt->flags & OPT_PRIO) {
641 if (prio < mainopt->priority) {
642 /* new value doesn't override old */
643 if (prio == OPRIO_CMDLINE && mainopt->priority > OPRIO_ROOT) {
644 option_error("%s%s set in %s cannot be overridden\n",
645 opt->name, optopt, mainopt->source);
650 if (prio > OPRIO_ROOT && mainopt->priority == OPRIO_CMDLINE)
651 warn("%s%s from %s overrides command line",
652 opt->name, optopt, option_source);
655 if ((opt->flags & OPT_INITONLY) && phase != PHASE_INITIALIZE) {
656 option_error("%s%s cannot be changed after initialization",
660 if ((opt->flags & OPT_PRIV) && !privileged_option) {
661 option_error("using the %s%s requires root privilege",
665 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
666 option_error("%s%s is disabled", opt->name, optopt);
669 if ((opt->flags & OPT_DEVEQUIV) && devnam_fixed) {
670 option_error("the %s%s may not be changed in %s",
671 opt->name, optopt, option_source);
677 v = opt->flags & OPT_VALUE;
678 *(bool *)(opt->addr) = v;
679 if (opt->addr2 && (opt->flags & OPT_A2COPY))
680 *(bool *)(opt->addr2) = v;
681 else if (opt->addr2 && (opt->flags & OPT_A2CLR))
682 *(bool *)(opt->addr2) = 0;
683 else if (opt->addr2 && (opt->flags & OPT_A2CLRB))
684 *(u_char *)(opt->addr2) &= ~v;
685 else if (opt->addr2 && (opt->flags & OPT_A2OR))
686 *(u_char *)(opt->addr2) |= v;
691 if ((opt->flags & OPT_NOARG) == 0) {
692 if (!int_option(*argv, &iv))
694 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
695 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
696 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
697 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
698 switch (opt->flags & OPT_LIMITS) {
700 option_error("%s value must be%s >= %d",
701 opt->name, zok, opt->lower_limit);
704 option_error("%s value must be%s <= %d",
705 opt->name, zok, opt->upper_limit);
708 option_error("%s value must be%s between %d and %d",
709 opt->name, zok, opt->lower_limit, opt->upper_limit);
715 a = opt->flags & OPT_VALUE;
717 a -= 256; /* sign extend */
719 if (opt->flags & OPT_INC)
720 iv += *(int *)(opt->addr);
721 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
722 int oldv = *(int *)(opt->addr);
723 if ((opt->flags & OPT_ZEROINF) ?
724 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
725 option_error("%s value cannot be increased", opt->name);
729 *(int *)(opt->addr) = iv;
730 if (opt->addr2 && (opt->flags & OPT_A2COPY))
731 *(int *)(opt->addr2) = iv;
735 if (opt->flags & OPT_NOARG) {
736 v = opt->flags & OPT_VALUE;
739 } else if (!number_option(*argv, &v, 16))
741 if (opt->flags & OPT_OR)
742 v |= *(u_int32_t *)(opt->addr);
743 *(u_int32_t *)(opt->addr) = v;
744 if (opt->addr2 && (opt->flags & OPT_A2COPY))
745 *(u_int32_t *)(opt->addr2) = v;
749 if (opt->flags & OPT_STATIC) {
750 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
754 novm("option argument");
755 *(char **)(opt->addr) = sv;
759 case o_special_noarg:
761 parser = (int (*) __P((char **))) opt->addr;
762 if (!(*parser)(argv))
764 if (opt->flags & OPT_A2LIST) {
765 struct option_value *ovp, **pp;
767 ovp = malloc(sizeof(*ovp) + strlen(*argv));
769 strcpy(ovp->value, *argv);
770 ovp->source = option_source;
772 pp = (struct option_value **) &opt->addr2;
781 wildp = (int (*) __P((char *, char **, int))) opt->addr;
782 if (!(*wildp)(cmd, argv, 1))
787 if (opt->addr2 && (opt->flags & (OPT_A2COPY|OPT_ENABLE
788 |OPT_A2PRINTER|OPT_A2STRVAL|OPT_A2LIST|OPT_A2OR)) == 0)
789 *(bool *)(opt->addr2) = !(opt->flags & OPT_A2CLR);
791 mainopt->source = option_source;
792 mainopt->priority = prio;
793 mainopt->winner = opt - mainopt;
799 * override_value - if the option priorities would permit us to
800 * override the value of option, return 1 and update the priority
801 * and source of the option value. Otherwise returns 0.
804 override_value(option, priority, source)
811 opt = find_option(option);
814 while (opt->flags & OPT_PRIOSUB)
816 if ((opt->flags & OPT_PRIO) && priority < opt->priority)
818 opt->priority = priority;
819 opt->source = source;
825 * n_arguments - tell how many arguments an option takes
831 return (opt->type == o_bool || opt->type == o_special_noarg
832 || (opt->flags & OPT_NOARG))? 0: 1;
836 * add_options - add a list of options to the set we grok.
842 struct option_list *list;
844 list = malloc(sizeof(*list));
846 novm("option list entry");
848 list->next = extra_options;
849 extra_options = list;
853 * check_options - check that options are valid and consistent.
858 if (logfile_fd >= 0 && logfile_fd != log_to_fd)
863 * print_option - print out an option and its value
866 print_option(opt, mainopt, printer, arg)
867 option_t *opt, *mainopt;
868 void (*printer) __P((void *, char *, ...));
874 if (opt->flags & OPT_NOPRINT)
878 v = opt->flags & OPT_VALUE;
879 if (*(bool *)opt->addr != v)
880 /* this can happen legitimately, e.g. lock
881 option turned off for default device */
883 printer(arg, "%s", opt->name);
886 v = opt->flags & OPT_VALUE;
889 i = *(int *)opt->addr;
890 if (opt->flags & OPT_NOARG) {
891 printer(arg, "%s", opt->name);
893 if (opt->flags & OPT_INC) {
894 for (; i > v; i -= v)
895 printer(arg, " %s", opt->name);
897 printer(arg, " # oops: %d not %d\n",
901 printer(arg, "%s %d", opt->name, i);
905 printer(arg, "%s", opt->name);
906 if ((opt->flags & OPT_NOARG) == 0)
907 printer(arg, " %x", *(u_int32_t *)opt->addr);
911 if (opt->flags & OPT_HIDE) {
914 p = (char *) opt->addr;
915 if ((opt->flags & OPT_STATIC) == 0)
918 printer(arg, "%s %q", opt->name, p);
922 case o_special_noarg:
924 if (opt->type != o_wild) {
925 printer(arg, "%s", opt->name);
926 if (n_arguments(opt) == 0)
930 if (opt->flags & OPT_A2PRINTER) {
931 void (*oprt) __P((option_t *,
932 void ((*)__P((void *, char *, ...))),
934 oprt = (void (*) __P((option_t *,
935 void ((*)__P((void *, char *, ...))),
937 (*oprt)(opt, printer, arg);
938 } else if (opt->flags & OPT_A2STRVAL) {
939 p = (char *) opt->addr2;
940 if ((opt->flags & OPT_STATIC) == 0)
943 } else if (opt->flags & OPT_A2LIST) {
944 struct option_value *ovp;
946 ovp = (struct option_value *) opt->addr2;
948 printer(arg, "%q", ovp->value);
949 if ((ovp = ovp->next) == NULL)
951 printer(arg, "\t\t# (from %s)\n%s ",
952 ovp->source, opt->name);
955 printer(arg, "xxx # [don't know how to print value]");
960 printer(arg, "# %s value (type %d\?\?)", opt->name, opt->type);
963 printer(arg, "\t\t# (from %s)\n", mainopt->source);
967 * print_option_list - print out options in effect from an
971 print_option_list(opt, printer, arg)
973 void (*printer) __P((void *, char *, ...));
976 while (opt->name != NULL) {
977 if (opt->priority != OPRIO_DEFAULT
978 && opt->winner != (short int) -1)
979 print_option(opt + opt->winner, opt, printer, arg);
982 } while (opt->flags & OPT_PRIOSUB);
987 * print_options - print out what options are in effect.
990 print_options(printer, arg)
991 void (*printer) __P((void *, char *, ...));
994 struct option_list *list;
997 printer(arg, "pppd options in effect:\n");
998 print_option_list(general_options, printer, arg);
999 print_option_list(auth_options, printer, arg);
1000 for (list = extra_options; list != NULL; list = list->next)
1001 print_option_list(list->options, printer, arg);
1002 print_option_list(the_channel->options, printer, arg);
1003 for (i = 0; protocols[i] != NULL; ++i)
1004 print_option_list(protocols[i]->options, printer, arg);
1008 * usage - print out a message telling how to use the program.
1013 if (phase == PHASE_INITIALIZE)
1014 fprintf(stderr, usage_string, VERSION, progname);
1018 * showhelp - print out usage message and exit.
1024 if (phase == PHASE_INITIALIZE) {
1032 * showversion - print out the version number and exit.
1038 if (phase == PHASE_INITIALIZE) {
1039 fprintf(stderr, "pppd version %s\n", VERSION);
1046 * option_error - print a message about an error in an option.
1047 * The message is logged, and also sent to
1048 * stderr if phase == PHASE_INITIALIZE.
1051 option_error __V((char *fmt, ...))
1056 #if defined(__STDC__)
1057 va_start(args, fmt);
1061 fmt = va_arg(args, char *);
1063 vslprintf(buf, sizeof(buf), fmt, args);
1065 if (phase == PHASE_INITIALIZE)
1066 fprintf(stderr, "%s: %s\n", progname, buf);
1067 syslog(LOG_ERR, "%s", buf);
1072 * readable - check if a file is readable by the real user.
1085 if (fstat(fd, &sbuf) != 0)
1087 if (sbuf.st_uid == uid)
1088 return sbuf.st_mode & S_IRUSR;
1089 if (sbuf.st_gid == getgid())
1090 return sbuf.st_mode & S_IRGRP;
1091 for (i = 0; i < ngroups; ++i)
1092 if (sbuf.st_gid == groups[i])
1093 return sbuf.st_mode & S_IRGRP;
1094 return sbuf.st_mode & S_IROTH;
1099 * Read a word from a file.
1100 * Words are delimited by white-space or by quotes (" or ').
1101 * Quotes, white-space and \ may be escaped with \.
1102 * \<newline> is ignored.
1105 getword(f, word, newlinep, filename)
1112 int quoted, comment;
1113 int value, digit, got, n;
1115 #define isoctal(c) ((c) >= '0' && (c) < '8')
1123 * First skip white-space and comments.
1131 * A newline means the end of a comment; backslash-newline
1132 * is ignored. Note that we cannot have escape && comment.
1144 * Ignore characters other than newline in a comment.
1150 * If this character is escaped, we have a word start.
1156 * If this is the escape character, look at the next character.
1164 * If this is the start of a comment, ignore the rest of the line.
1172 * A non-whitespace character is the start of a word.
1179 * Save the delimiter for quoted strings.
1181 if (!escape && (c == '"' || c == '\'')) {
1188 * Process characters until the end of the word.
1193 * This character is escaped: backslash-newline is ignored,
1194 * various other characters indicate particular values
1195 * as for C backslash-escapes.
1230 * \ddd octal sequence
1233 for (n = 0; n < 3 && isoctal(c); ++n) {
1234 value = (value << 3) + (c & 07);
1243 * \x<hex_string> sequence
1247 for (n = 0; n < 2 && isxdigit(c); ++n) {
1248 digit = toupper(c) - '0';
1250 digit += '0' + 10 - 'A';
1251 value = (value << 4) + digit;
1259 * Otherwise the character stands for itself.
1266 * Store the resulting character for the escape sequence.
1268 if (len < MAXWORDLEN-1)
1279 * Not escaped: see if we've reached the end of the word.
1285 if (isspace(c) || c == '#') {
1292 * Backslash starts an escape sequence.
1301 * An ordinary character: store it in the word and get another.
1303 if (len < MAXWORDLEN-1)
1311 * End of the word: check for errors.
1317 option_error("Error reading %s: %m", filename);
1321 * If len is zero, then we didn't find a word before the
1329 * Warn if the word was too long, and append a terminating null.
1331 if (len >= MAXWORDLEN) {
1332 option_error("warning: word in file %s too long (%.20s...)",
1334 len = MAXWORDLEN - 1;
1345 * number_option - parse an unsigned numeric parameter for an option.
1348 number_option(str, valp, base)
1355 *valp = strtoul(str, &ptr, base);
1357 option_error("invalid numeric parameter '%s' for %s option",
1358 str, current_option);
1366 * int_option - like number_option, but valp is int *,
1367 * the base is assumed to be 0, and *valp is not changed
1368 * if there is an error.
1371 int_option(str, valp)
1377 if (!number_option(str, &v, 0))
1385 * The following procedures parse options.
1389 * readfile - take commands from a file.
1395 return options_from_file(*argv, 1, 1, privileged_option);
1399 * callfile - take commands from /etc/ppp/peers/<name>.
1400 * Name may not contain /../, start with / or ../, or end in /..
1406 char *fname, *arg, *p;
1411 if (arg[0] == '/' || arg[0] == 0)
1414 for (p = arg; *p != 0; ) {
1415 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1419 while (*p != '/' && *p != 0)
1426 option_error("call option value may not contain .. or start with /");
1430 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1431 if ((fname = (char *) malloc(l)) == NULL)
1432 novm("call file name");
1433 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1435 ok = options_from_file(fname, 1, 1, 1);
1443 * setpassfilter - Set the pass filter for packets
1452 pc = pcap_open_dead(DLT_PPP_WITHDIRECTION, 65535);
1453 if (pcap_compile(pc, &pass_filter, *argv, 1, netmask) == -1) {
1454 option_error("error in pass-filter expression: %s\n",
1464 * setactivefilter - Set the active filter for packets
1467 setactivefilter(argv)
1473 pc = pcap_open_dead(DLT_PPP_WITHDIRECTION, 65535);
1474 if (pcap_compile(pc, &active_filter, *argv, 1, netmask) == -1) {
1475 option_error("error in active-filter expression: %s\n",
1486 * setdomain - Set domain name to append to hostname
1492 gethostname(hostname, MAXNAMELEN);
1495 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1496 domain = hostname + strlen(hostname);
1497 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1499 hostname[MAXNAMELEN-1] = 0;
1509 if (!privileged_option)
1511 fd = open(*argv, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0644);
1512 if (fd < 0 && errno == EEXIST)
1513 fd = open(*argv, O_WRONLY | O_APPEND);
1515 if (!privileged_option)
1519 option_error("Can't open log file %s: %m", *argv);
1522 strlcpy(logfile_name, *argv, sizeof(logfile_name));
1523 if (logfile_fd >= 0)
1538 if(!strcmp(*argv,"in")) {
1539 maxoctets_dir = PPP_OCTETS_DIRECTION_IN;
1540 } else if (!strcmp(*argv,"out")) {
1541 maxoctets_dir = PPP_OCTETS_DIRECTION_OUT;
1542 } else if (!strcmp(*argv,"max")) {
1543 maxoctets_dir = PPP_OCTETS_DIRECTION_MAXOVERAL;
1545 maxoctets_dir = PPP_OCTETS_DIRECTION_SUM;
1559 void (*init) __P((void));
1563 if (strchr(arg, '/') == 0) {
1564 const char *base = _PATH_PLUGIN;
1565 int l = strlen(base) + strlen(arg) + 2;
1568 novm("plugin file path");
1569 strlcpy(path, base, l);
1570 strlcat(path, "/", l);
1571 strlcat(path, arg, l);
1573 handle = dlopen(path, RTLD_GLOBAL | RTLD_NOW);
1577 option_error("%s", err);
1578 option_error("Couldn't load plugin %s", arg);
1581 init = (void (*)(void))dlsym(handle, "plugin_init");
1583 option_error("%s has no initialization entry point", arg);
1586 vers = (const char *) dlsym(handle, "pppd_version");
1588 warn("Warning: plugin %s has no version information", arg);
1589 } else if (strcmp(vers, VERSION) != 0) {
1590 option_error("Plugin %s is for pppd version %s, this is %s",
1591 arg, vers, VERSION);
1594 info("Plugin %s loaded.", arg);