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 1.92 2004/01/13 04:02:07 paulus Exp $"
59 #include <pcap-int.h> /* XXX: To get struct pcap */
63 #include "pathnames.h"
65 #if defined(ultrix) || defined(NeXT)
66 char *strdup __P((char *));
69 static const char rcsid[] = RCSID;
72 struct option_value *next;
78 * Option variables and default values.
81 int dflag = 0; /* Tell libpcap we want debugging */
83 int debug = 0; /* Debug flag */
84 int kdebugflag = 0; /* Tell kernel to print debug messages */
85 int default_device = 1; /* Using /dev/tty or equivalent */
86 char devnam[MAXPATHLEN]; /* Device name */
87 bool nodetach = 0; /* Don't detach from controlling tty */
88 bool updetach = 0; /* Detach once link is up */
89 int maxconnect = 0; /* Maximum connect time */
90 char user[MAXNAMELEN]; /* Username for PAP */
91 char passwd[MAXSECRETLEN]; /* Password for PAP */
92 bool persist = 0; /* Reopen link after it goes down */
93 char our_name[MAXNAMELEN]; /* Our name for authentication purposes */
94 bool demand = 0; /* do dial-on-demand */
95 char *ipparam = NULL; /* Extra parameter for ip up/down scripts */
96 int idle_time_limit = 0; /* Disconnect if idle for this many seconds */
97 int holdoff = 30; /* # seconds to pause before reconnecting */
98 bool holdoff_specified; /* true if a holdoff value has been given */
99 int log_to_fd = 1; /* send log messages to this fd too */
100 bool log_default = 1; /* log_to_fd is default (stdout) */
101 int maxfail = 10; /* max # of unsuccessful connection attempts */
102 char linkname[MAXPATHLEN]; /* logical name for link */
103 bool tune_kernel; /* may alter kernel settings */
104 int connect_delay = 1000; /* wait this many ms after connect script */
105 int req_unit = -1; /* requested interface unit */
106 bool multilink = 0; /* Enable multilink operation */
107 char *bundle_name = NULL; /* bundle name for multilink */
108 bool dump_options; /* print out option values */
109 bool dryrun; /* print out option values and exit */
110 char *domain; /* domain name set by domain option */
113 unsigned int maxoctets = 0; /* default - no limit */
114 int maxoctets_dir = 0; /* default - sum of traffic */
115 int maxoctets_timeout = 1; /* default 1 second */
119 extern option_t auth_options[];
120 extern struct stat devstat;
123 struct bpf_program pass_filter;/* Filter program for packets to pass */
124 struct bpf_program active_filter; /* Filter program for link-active pkts */
125 pcap_t pc; /* Fake struct pcap so we can compile expr */
128 char *current_option; /* the name of the option being parsed */
129 int privileged_option; /* set iff the current option came from root */
130 char *option_source; /* string saying where the option came from */
131 int option_priority = OPRIO_CFGFILE; /* priority of the current options */
132 bool devnam_fixed; /* can no longer change device name */
134 static int logfile_fd = -1; /* fd opened for log file */
135 static char logfile_name[MAXPATHLEN]; /* name of log file */
140 static int setdomain __P((char **));
141 static int readfile __P((char **));
142 static int callfile __P((char **));
143 static int showversion __P((char **));
144 static int showhelp __P((char **));
145 static void usage __P((void));
146 static int setlogfile __P((char **));
148 static int loadplugin __P((char **));
152 static int setpassfilter __P((char **));
153 static int setactivefilter __P((char **));
157 static int setmodir __P((char **));
160 static option_t *find_option __P((const char *name));
161 static int process_option __P((option_t *, char *, char **));
162 static int n_arguments __P((option_t *));
163 static int number_option __P((char *, u_int32_t *, int));
166 * Structure to store extra lists of options.
170 struct option_list *next;
173 static struct option_list *extra_options = NULL;
178 option_t general_options[] = {
179 { "debug", o_int, &debug,
180 "Increase debugging level", OPT_INC | OPT_NOARG | 1 },
181 { "-d", o_int, &debug,
182 "Increase debugging level",
183 OPT_ALIAS | OPT_INC | OPT_NOARG | 1 },
185 { "kdebug", o_int, &kdebugflag,
186 "Set kernel driver debug level", OPT_PRIO },
188 { "nodetach", o_bool, &nodetach,
189 "Don't detach from controlling tty", OPT_PRIO | 1 },
190 { "-detach", o_bool, &nodetach,
191 "Don't detach from controlling tty", OPT_ALIAS | OPT_PRIOSUB | 1 },
192 { "updetach", o_bool, &updetach,
193 "Detach from controlling tty once link is up",
194 OPT_PRIOSUB | OPT_A2CLR | 1, &nodetach },
196 { "holdoff", o_int, &holdoff,
197 "Set time in seconds before retrying connection", OPT_PRIO },
199 { "idle", o_int, &idle_time_limit,
200 "Set time in seconds before disconnecting idle link", OPT_PRIO },
202 { "maxconnect", o_int, &maxconnect,
203 "Set connection time limit",
204 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
206 { "domain", o_special, (void *)setdomain,
207 "Add given domain name to hostname",
208 OPT_PRIO | OPT_PRIV | OPT_A2STRVAL, &domain },
210 { "file", o_special, (void *)readfile,
211 "Take options from a file", OPT_NOPRINT },
212 { "call", o_special, (void *)callfile,
213 "Take options from a privileged file", OPT_NOPRINT },
215 { "persist", o_bool, &persist,
216 "Keep on reopening connection after close", OPT_PRIO | 1 },
217 { "nopersist", o_bool, &persist,
218 "Turn off persist option", OPT_PRIOSUB },
220 { "demand", o_bool, &demand,
221 "Dial on demand", OPT_INITONLY | 1, &persist },
223 { "--version", o_special_noarg, (void *)showversion,
224 "Show version number" },
225 { "--help", o_special_noarg, (void *)showhelp,
226 "Show brief listing of options" },
227 { "-h", o_special_noarg, (void *)showhelp,
228 "Show brief listing of options", OPT_ALIAS },
230 { "logfile", o_special, (void *)setlogfile,
231 "Append log messages to this file",
232 OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, &logfile_name },
233 { "logfd", o_int, &log_to_fd,
234 "Send log messages to this file descriptor",
235 OPT_PRIOSUB | OPT_A2CLR, &log_default },
236 { "nolog", o_int, &log_to_fd,
237 "Don't send log messages to any file",
238 OPT_PRIOSUB | OPT_NOARG | OPT_VAL(-1) },
239 { "nologfd", o_int, &log_to_fd,
240 "Don't send log messages to any file descriptor",
241 OPT_PRIOSUB | OPT_ALIAS | OPT_NOARG | OPT_VAL(-1) },
243 { "linkname", o_string, linkname,
244 "Set logical name for link",
245 OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXPATHLEN },
247 { "maxfail", o_int, &maxfail,
248 "Maximum number of unsuccessful connection attempts to allow",
251 { "ktune", o_bool, &tune_kernel,
252 "Alter kernel settings as necessary", OPT_PRIO | 1 },
253 { "noktune", o_bool, &tune_kernel,
254 "Don't alter kernel settings", OPT_PRIOSUB },
256 { "connect-delay", o_int, &connect_delay,
257 "Maximum time (in ms) to wait after connect script finishes",
260 { "unit", o_int, &req_unit,
261 "PPP interface unit number to use if possible",
262 OPT_PRIO | OPT_LLIMIT, 0, 0 },
264 { "dump", o_bool, &dump_options,
265 "Print out option values after parsing all options", 1 },
266 { "dryrun", o_bool, &dryrun,
267 "Stop after parsing, printing, and checking options", 1 },
269 #ifdef HAVE_MULTILINK
270 { "multilink", o_bool, &multilink,
271 "Enable multilink operation", OPT_PRIO | 1 },
272 { "mp", o_bool, &multilink,
273 "Enable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 1 },
274 { "nomultilink", o_bool, &multilink,
275 "Disable multilink operation", OPT_PRIOSUB | 0 },
276 { "nomp", o_bool, &multilink,
277 "Disable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 0 },
279 { "bundle", o_string, &bundle_name,
280 "Bundle name for multilink", OPT_PRIO },
281 #endif /* HAVE_MULTILINK */
284 { "plugin", o_special, (void *)loadplugin,
285 "Load a plug-in module into pppd", OPT_PRIV | OPT_A2LIST },
289 { "pdebug", o_int, &dflag,
290 "libpcap debugging", OPT_PRIO },
292 { "pass-filter", 1, setpassfilter,
293 "set filter for packets to pass", OPT_PRIO },
295 { "active-filter", 1, setactivefilter,
296 "set filter for active pkts", OPT_PRIO },
300 { "maxoctets", o_int, &maxoctets,
301 "Set connection traffic limit",
302 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
303 { "mo", o_int, &maxoctets,
304 "Set connection traffic limit",
305 OPT_ALIAS | OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
306 { "mo-direction", o_special, setmodir,
307 "Set direction for limit traffic (sum,in,out,max)" },
308 { "mo-timeout", o_int, &maxoctets_timeout,
309 "Check for traffic limit every N seconds", OPT_PRIO | OPT_LLIMIT | 1 },
315 #ifndef IMPLEMENTATION
316 #define IMPLEMENTATION ""
319 static char *usage_string = "\
321 Usage: %s [ options ], where options are:\n\
322 <device> Communicate over the named device\n\
323 <speed> Set the baud rate to <speed>\n\
324 <loc>:<rem> Set the local and/or remote interface IP\n\
325 addresses. Either one may be omitted.\n\
326 asyncmap <n> Set the desired async map to hex <n>\n\
327 auth Require authentication from peer\n\
328 connect <p> Invoke shell command <p> to set up the serial line\n\
329 crtscts Use hardware RTS/CTS flow control\n\
330 defaultroute Add default route through interface\n\
331 file <f> Take options from file <f>\n\
332 modem Use modem control lines\n\
333 mru <n> Set MRU value to <n> for negotiation\n\
334 See pppd(8) for more options.\n\
338 * parse_args - parse a string of arguments from the command line.
341 parse_args(argc, argv)
349 privileged_option = privileged;
350 option_source = "command line";
351 option_priority = OPRIO_CMDLINE;
355 opt = find_option(arg);
357 option_error("unrecognized option '%s'", arg);
361 n = n_arguments(opt);
363 option_error("too few parameters for option %s", arg);
366 if (!process_option(opt, arg, argv))
375 * options_from_file - Read a string of options from a file,
376 * and interpret them.
379 options_from_file(filename, must_exist, check_prot, priv)
386 int i, newline, ret, err;
391 char args[MAXARGS][MAXWORDLEN];
392 char cmd[MAXWORDLEN];
396 f = fopen(filename, "r");
403 if (err != ENOENT && err != ENOTDIR)
404 warn("Warning: can't open options file %s: %m", filename);
407 option_error("Can't open options file %s: %m", filename);
411 oldpriv = privileged_option;
412 privileged_option = priv;
413 oldsource = option_source;
414 option_source = strdup(filename);
415 if (option_source == NULL)
416 option_source = "file";
418 while (getword(f, cmd, &newline, filename)) {
419 opt = find_option(cmd);
421 option_error("In file %s: unrecognized option '%s'",
425 n = n_arguments(opt);
426 for (i = 0; i < n; ++i) {
427 if (!getword(f, args[i], &newline, filename)) {
429 "In file %s: too few parameters for option '%s'",
435 if (!process_option(opt, cmd, argv))
442 privileged_option = oldpriv;
443 option_source = oldsource;
448 * options_from_user - See if the use has a ~/.ppprc file,
449 * and if so, interpret options from it.
454 char *user, *path, *file;
459 pw = getpwuid(getuid());
460 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
462 file = _PATH_USEROPT;
463 pl = strlen(user) + strlen(file) + 2;
466 novm("init file name");
467 slprintf(path, pl, "%s/%s", user, file);
468 option_priority = OPRIO_CFGFILE;
469 ret = options_from_file(path, 0, 1, privileged);
475 * options_for_tty - See if an options file exists for the serial
476 * device, and if so, interpret options from it.
477 * We only allow the per-tty options file to override anything from
478 * the command line if it is something that the user can't override
479 * once it has been set by root; this is done by giving configuration
480 * files a lower priority than the command line.
485 char *dev, *path, *p;
490 if ((p = strstr(dev, "/dev/")) != NULL)
492 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
493 return 1; /* don't look for /etc/ppp/options.tty */
494 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
497 novm("tty init file name");
498 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
499 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
500 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
503 option_priority = OPRIO_CFGFILE;
504 ret = options_from_file(path, 0, 0, 1);
510 * options_from_list - process a string of options in a wordlist.
513 options_from_list(w, priv)
522 privileged_option = priv;
523 option_source = "secrets file";
524 option_priority = OPRIO_SECFILE;
527 opt = find_option(w->word);
529 option_error("In secrets file: unrecognized option '%s'",
533 n = n_arguments(opt);
535 for (i = 0; i < n; ++i) {
539 "In secrets file: too few parameters for option '%s'",
545 if (!process_option(opt, w0->word, argv))
556 * match_option - see if this option matches an option_t structure.
559 match_option(name, opt, dowild)
564 int (*match) __P((char *, char **, int));
566 if (dowild != (opt->type == o_wild))
569 return strcmp(name, opt->name) == 0;
570 match = (int (*) __P((char *, char **, int))) opt->addr;
571 return (*match)(name, NULL, 0);
575 * find_option - scan the option lists for the various protocols
576 * looking for an entry with the given name.
577 * This could be optimized by using a hash table.
584 struct option_list *list;
587 for (dowild = 0; dowild <= 1; ++dowild) {
588 for (opt = general_options; opt->name != NULL; ++opt)
589 if (match_option(name, opt, dowild))
591 for (opt = auth_options; opt->name != NULL; ++opt)
592 if (match_option(name, opt, dowild))
594 for (list = extra_options; list != NULL; list = list->next)
595 for (opt = list->options; opt->name != NULL; ++opt)
596 if (match_option(name, opt, dowild))
598 for (opt = the_channel->options; opt->name != NULL; ++opt)
599 if (match_option(name, opt, dowild))
601 for (i = 0; protocols[i] != NULL; ++i)
602 if ((opt = protocols[i]->options) != NULL)
603 for (; opt->name != NULL; ++opt)
604 if (match_option(name, opt, dowild))
611 * process_option - process one new-style option.
614 process_option(opt, cmd, argv)
622 int (*parser) __P((char **));
623 int (*wildp) __P((char *, char **, int));
624 char *optopt = (opt->type == o_wild)? "": " option";
625 int prio = option_priority;
626 option_t *mainopt = opt;
628 current_option = opt->name;
629 if ((opt->flags & OPT_PRIVFIX) && privileged_option)
631 while (mainopt->flags & OPT_PRIOSUB)
633 if (mainopt->flags & OPT_PRIO) {
634 if (prio < mainopt->priority) {
635 /* new value doesn't override old */
636 if (prio == OPRIO_CMDLINE && mainopt->priority > OPRIO_ROOT) {
637 option_error("%s%s set in %s cannot be overridden\n",
638 opt->name, optopt, mainopt->source);
643 if (prio > OPRIO_ROOT && mainopt->priority == OPRIO_CMDLINE)
644 warn("%s%s from %s overrides command line",
645 opt->name, optopt, option_source);
648 if ((opt->flags & OPT_INITONLY) && phase != PHASE_INITIALIZE) {
649 option_error("%s%s cannot be changed after initialization",
653 if ((opt->flags & OPT_PRIV) && !privileged_option) {
654 option_error("using the %s%s requires root privilege",
658 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
659 option_error("%s%s is disabled", opt->name, optopt);
662 if ((opt->flags & OPT_DEVEQUIV) && devnam_fixed) {
663 option_error("the %s%s may not be changed in %s",
664 opt->name, optopt, option_source);
670 v = opt->flags & OPT_VALUE;
671 *(bool *)(opt->addr) = v;
672 if (opt->addr2 && (opt->flags & OPT_A2COPY))
673 *(bool *)(opt->addr2) = v;
674 else if (opt->addr2 && (opt->flags & OPT_A2CLR))
675 *(bool *)(opt->addr2) = 0;
676 else if (opt->addr2 && (opt->flags & OPT_A2CLRB))
677 *(u_char *)(opt->addr2) &= ~v;
678 else if (opt->addr2 && (opt->flags & OPT_A2OR))
679 *(u_char *)(opt->addr2) |= v;
684 if ((opt->flags & OPT_NOARG) == 0) {
685 if (!int_option(*argv, &iv))
687 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
688 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
689 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
690 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
691 switch (opt->flags & OPT_LIMITS) {
693 option_error("%s value must be%s >= %d",
694 opt->name, zok, opt->lower_limit);
697 option_error("%s value must be%s <= %d",
698 opt->name, zok, opt->upper_limit);
701 option_error("%s value must be%s between %d and %d",
702 opt->name, zok, opt->lower_limit, opt->upper_limit);
708 a = opt->flags & OPT_VALUE;
710 a -= 256; /* sign extend */
712 if (opt->flags & OPT_INC)
713 iv += *(int *)(opt->addr);
714 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
715 int oldv = *(int *)(opt->addr);
716 if ((opt->flags & OPT_ZEROINF) ?
717 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
718 option_error("%s value cannot be increased", opt->name);
722 *(int *)(opt->addr) = iv;
723 if (opt->addr2 && (opt->flags & OPT_A2COPY))
724 *(int *)(opt->addr2) = iv;
728 if (opt->flags & OPT_NOARG) {
729 v = opt->flags & OPT_VALUE;
732 } else if (!number_option(*argv, &v, 16))
734 if (opt->flags & OPT_OR)
735 v |= *(u_int32_t *)(opt->addr);
736 *(u_int32_t *)(opt->addr) = v;
737 if (opt->addr2 && (opt->flags & OPT_A2COPY))
738 *(u_int32_t *)(opt->addr2) = v;
742 if (opt->flags & OPT_STATIC) {
743 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
747 novm("option argument");
748 *(char **)(opt->addr) = sv;
752 case o_special_noarg:
754 parser = (int (*) __P((char **))) opt->addr;
755 if (!(*parser)(argv))
757 if (opt->flags & OPT_A2LIST) {
758 struct option_value *ovp, **pp;
760 ovp = malloc(sizeof(*ovp) + strlen(*argv));
762 strcpy(ovp->value, *argv);
763 ovp->source = option_source;
765 pp = (struct option_value **) &opt->addr2;
774 wildp = (int (*) __P((char *, char **, int))) opt->addr;
775 if (!(*wildp)(cmd, argv, 1))
780 if (opt->addr2 && (opt->flags & (OPT_A2COPY|OPT_ENABLE
781 |OPT_A2PRINTER|OPT_A2STRVAL|OPT_A2LIST|OPT_A2OR)) == 0)
782 *(bool *)(opt->addr2) = !(opt->flags & OPT_A2CLR);
784 mainopt->source = option_source;
785 mainopt->priority = prio;
786 mainopt->winner = opt - mainopt;
792 * override_value - if the option priorities would permit us to
793 * override the value of option, return 1 and update the priority
794 * and source of the option value. Otherwise returns 0.
797 override_value(option, priority, source)
804 opt = find_option(option);
807 while (opt->flags & OPT_PRIOSUB)
809 if ((opt->flags & OPT_PRIO) && priority < opt->priority)
811 opt->priority = priority;
812 opt->source = source;
818 * n_arguments - tell how many arguments an option takes
824 return (opt->type == o_bool || opt->type == o_special_noarg
825 || (opt->flags & OPT_NOARG))? 0: 1;
829 * add_options - add a list of options to the set we grok.
835 struct option_list *list;
837 list = malloc(sizeof(*list));
839 novm("option list entry");
841 list->next = extra_options;
842 extra_options = list;
846 * check_options - check that options are valid and consistent.
851 if (logfile_fd >= 0 && logfile_fd != log_to_fd)
856 * print_option - print out an option and its value
859 print_option(opt, mainopt, printer, arg)
860 option_t *opt, *mainopt;
861 void (*printer) __P((void *, char *, ...));
867 if (opt->flags & OPT_NOPRINT)
871 v = opt->flags & OPT_VALUE;
872 if (*(bool *)opt->addr != v)
873 /* this can happen legitimately, e.g. lock
874 option turned off for default device */
876 printer(arg, "%s", opt->name);
879 v = opt->flags & OPT_VALUE;
882 i = *(int *)opt->addr;
883 if (opt->flags & OPT_NOARG) {
884 printer(arg, "%s", opt->name);
886 if (opt->flags & OPT_INC) {
887 for (; i > v; i -= v)
888 printer(arg, " %s", opt->name);
890 printer(arg, " # oops: %d not %d\n",
894 printer(arg, "%s %d", opt->name, i);
898 printer(arg, "%s", opt->name);
899 if ((opt->flags & OPT_NOARG) == 0)
900 printer(arg, " %x", *(u_int32_t *)opt->addr);
904 if (opt->flags & OPT_HIDE) {
907 p = (char *) opt->addr;
908 if ((opt->flags & OPT_STATIC) == 0)
911 printer(arg, "%s %q", opt->name, p);
915 case o_special_noarg:
917 if (opt->type != o_wild) {
918 printer(arg, "%s", opt->name);
919 if (n_arguments(opt) == 0)
923 if (opt->flags & OPT_A2PRINTER) {
924 void (*oprt) __P((option_t *,
925 void ((*)__P((void *, char *, ...))),
927 oprt = (void (*) __P((option_t *,
928 void ((*)__P((void *, char *, ...))),
930 (*oprt)(opt, printer, arg);
931 } else if (opt->flags & OPT_A2STRVAL) {
932 p = (char *) opt->addr2;
933 if ((opt->flags & OPT_STATIC) == 0)
936 } else if (opt->flags & OPT_A2LIST) {
937 struct option_value *ovp;
939 ovp = (struct option_value *) opt->addr2;
941 printer(arg, "%q", ovp->value);
942 if ((ovp = ovp->next) == NULL)
944 printer(arg, "\t\t# (from %s)\n%s ",
945 ovp->source, opt->name);
948 printer(arg, "xxx # [don't know how to print value]");
953 printer(arg, "# %s value (type %d\?\?)", opt->name, opt->type);
956 printer(arg, "\t\t# (from %s)\n", mainopt->source);
960 * print_option_list - print out options in effect from an
964 print_option_list(opt, printer, arg)
966 void (*printer) __P((void *, char *, ...));
969 while (opt->name != NULL) {
970 if (opt->priority != OPRIO_DEFAULT
971 && opt->winner != (short int) -1)
972 print_option(opt + opt->winner, opt, printer, arg);
975 } while (opt->flags & OPT_PRIOSUB);
980 * print_options - print out what options are in effect.
983 print_options(printer, arg)
984 void (*printer) __P((void *, char *, ...));
987 struct option_list *list;
990 printer(arg, "pppd options in effect:\n");
991 print_option_list(general_options, printer, arg);
992 print_option_list(auth_options, printer, arg);
993 for (list = extra_options; list != NULL; list = list->next)
994 print_option_list(list->options, printer, arg);
995 print_option_list(the_channel->options, printer, arg);
996 for (i = 0; protocols[i] != NULL; ++i)
997 print_option_list(protocols[i]->options, printer, arg);
1001 * usage - print out a message telling how to use the program.
1006 if (phase == PHASE_INITIALIZE)
1007 fprintf(stderr, usage_string, VERSION, progname);
1011 * showhelp - print out usage message and exit.
1017 if (phase == PHASE_INITIALIZE) {
1025 * showversion - print out the version number and exit.
1031 if (phase == PHASE_INITIALIZE) {
1032 fprintf(stderr, "pppd version %s\n", VERSION);
1039 * option_error - print a message about an error in an option.
1040 * The message is logged, and also sent to
1041 * stderr if phase == PHASE_INITIALIZE.
1044 option_error __V((char *fmt, ...))
1049 #if defined(__STDC__)
1050 va_start(args, fmt);
1054 fmt = va_arg(args, char *);
1056 vslprintf(buf, sizeof(buf), fmt, args);
1058 if (phase == PHASE_INITIALIZE)
1059 fprintf(stderr, "%s: %s\n", progname, buf);
1060 syslog(LOG_ERR, "%s", buf);
1065 * readable - check if a file is readable by the real user.
1078 if (fstat(fd, &sbuf) != 0)
1080 if (sbuf.st_uid == uid)
1081 return sbuf.st_mode & S_IRUSR;
1082 if (sbuf.st_gid == getgid())
1083 return sbuf.st_mode & S_IRGRP;
1084 for (i = 0; i < ngroups; ++i)
1085 if (sbuf.st_gid == groups[i])
1086 return sbuf.st_mode & S_IRGRP;
1087 return sbuf.st_mode & S_IROTH;
1092 * Read a word from a file.
1093 * Words are delimited by white-space or by quotes (" or ').
1094 * Quotes, white-space and \ may be escaped with \.
1095 * \<newline> is ignored.
1098 getword(f, word, newlinep, filename)
1105 int quoted, comment;
1106 int value, digit, got, n;
1108 #define isoctal(c) ((c) >= '0' && (c) < '8')
1116 * First skip white-space and comments.
1124 * A newline means the end of a comment; backslash-newline
1125 * is ignored. Note that we cannot have escape && comment.
1137 * Ignore characters other than newline in a comment.
1143 * If this character is escaped, we have a word start.
1149 * If this is the escape character, look at the next character.
1157 * If this is the start of a comment, ignore the rest of the line.
1165 * A non-whitespace character is the start of a word.
1172 * Save the delimiter for quoted strings.
1174 if (!escape && (c == '"' || c == '\'')) {
1181 * Process characters until the end of the word.
1186 * This character is escaped: backslash-newline is ignored,
1187 * various other characters indicate particular values
1188 * as for C backslash-escapes.
1223 * \ddd octal sequence
1226 for (n = 0; n < 3 && isoctal(c); ++n) {
1227 value = (value << 3) + (c & 07);
1236 * \x<hex_string> sequence
1240 for (n = 0; n < 2 && isxdigit(c); ++n) {
1241 digit = toupper(c) - '0';
1243 digit += '0' + 10 - 'A';
1244 value = (value << 4) + digit;
1252 * Otherwise the character stands for itself.
1259 * Store the resulting character for the escape sequence.
1261 if (len < MAXWORDLEN-1)
1272 * Not escaped: see if we've reached the end of the word.
1278 if (isspace(c) || c == '#') {
1285 * Backslash starts an escape sequence.
1294 * An ordinary character: store it in the word and get another.
1296 if (len < MAXWORDLEN-1)
1304 * End of the word: check for errors.
1310 option_error("Error reading %s: %m", filename);
1314 * If len is zero, then we didn't find a word before the
1322 * Warn if the word was too long, and append a terminating null.
1324 if (len >= MAXWORDLEN) {
1325 option_error("warning: word in file %s too long (%.20s...)",
1327 len = MAXWORDLEN - 1;
1338 * number_option - parse an unsigned numeric parameter for an option.
1341 number_option(str, valp, base)
1348 *valp = strtoul(str, &ptr, base);
1350 option_error("invalid numeric parameter '%s' for %s option",
1351 str, current_option);
1359 * int_option - like number_option, but valp is int *,
1360 * the base is assumed to be 0, and *valp is not changed
1361 * if there is an error.
1364 int_option(str, valp)
1370 if (!number_option(str, &v, 0))
1378 * The following procedures parse options.
1382 * readfile - take commands from a file.
1388 return options_from_file(*argv, 1, 1, privileged_option);
1392 * callfile - take commands from /etc/ppp/peers/<name>.
1393 * Name may not contain /../, start with / or ../, or end in /..
1399 char *fname, *arg, *p;
1404 if (arg[0] == '/' || arg[0] == 0)
1407 for (p = arg; *p != 0; ) {
1408 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1412 while (*p != '/' && *p != 0)
1419 option_error("call option value may not contain .. or start with /");
1423 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1424 if ((fname = (char *) malloc(l)) == NULL)
1425 novm("call file name");
1426 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1428 ok = options_from_file(fname, 1, 1, 1);
1436 * setpassfilter - Set the pass filter for packets
1442 pc.linktype = DLT_PPP;
1443 pc.snapshot = PPP_HDRLEN;
1445 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1447 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1452 * setactivefilter - Set the active filter for packets
1455 setactivefilter(argv)
1458 pc.linktype = DLT_PPP;
1459 pc.snapshot = PPP_HDRLEN;
1461 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1463 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1469 * setdomain - Set domain name to append to hostname
1475 gethostname(hostname, MAXNAMELEN);
1478 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1479 domain = hostname + strlen(hostname);
1480 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1482 hostname[MAXNAMELEN-1] = 0;
1492 if (!privileged_option)
1494 fd = open(*argv, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0644);
1495 if (fd < 0 && errno == EEXIST)
1496 fd = open(*argv, O_WRONLY | O_APPEND);
1498 if (!privileged_option)
1502 option_error("Can't open log file %s: %m", *argv);
1505 strlcpy(logfile_name, *argv, sizeof(logfile_name));
1506 if (logfile_fd >= 0)
1521 if(!strcmp(*argv,"in")) {
1522 maxoctets_dir = PPP_OCTETS_DIRECTION_IN;
1523 } else if (!strcmp(*argv,"out")) {
1524 maxoctets_dir = PPP_OCTETS_DIRECTION_OUT;
1525 } else if (!strcmp(*argv,"max")) {
1526 maxoctets_dir = PPP_OCTETS_DIRECTION_MAXOVERAL;
1528 maxoctets_dir = PPP_OCTETS_DIRECTION_SUM;
1542 void (*init) __P((void));
1546 if (strchr(arg, '/') == 0) {
1547 const char *base = _PATH_PLUGIN;
1548 int l = strlen(base) + strlen(arg) + 2;
1551 novm("plugin file path");
1552 strlcpy(path, base, l);
1553 strlcat(path, "/", l);
1554 strlcat(path, arg, l);
1556 handle = dlopen(path, RTLD_GLOBAL | RTLD_NOW);
1560 option_error("%s", err);
1561 option_error("Couldn't load plugin %s", arg);
1564 init = (void (*)(void))dlsym(handle, "plugin_init");
1566 option_error("%s has no initialization entry point", arg);
1569 vers = (const char *) dlsym(handle, "pppd_version");
1571 warn("Warning: plugin %s has no version information", arg);
1572 } else if (strcmp(vers, VERSION) != 0) {
1573 option_error("Plugin %s is for pppd version %s, this is %s",
1574 arg, vers, VERSION);
1577 info("Plugin %s loaded.", arg);