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 1.88 2002/09/24 11:35:22 fcusack Exp $"
36 #include <pcap-int.h> /* XXX: To get struct pcap */
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 */
90 unsigned int maxoctets = 0; /* default - no limit */
91 int maxoctets_dir = 0; /* default - sum of traffic */
92 int maxoctets_timeout = 1; /* default 1 second */
96 extern option_t auth_options[];
97 extern struct stat devstat;
100 struct bpf_program pass_filter;/* Filter program for packets to pass */
101 struct bpf_program active_filter; /* Filter program for link-active pkts */
102 pcap_t pc; /* Fake struct pcap so we can compile expr */
105 char *current_option; /* the name of the option being parsed */
106 int privileged_option; /* set iff the current option came from root */
107 char *option_source; /* string saying where the option came from */
108 int option_priority = OPRIO_CFGFILE; /* priority of the current options */
109 bool devnam_fixed; /* can no longer change device name */
111 static int logfile_fd = -1; /* fd opened for log file */
112 static char logfile_name[MAXPATHLEN]; /* name of log file */
117 static int setdomain __P((char **));
118 static int readfile __P((char **));
119 static int callfile __P((char **));
120 static int showversion __P((char **));
121 static int showhelp __P((char **));
122 static void usage __P((void));
123 static int setlogfile __P((char **));
125 static int loadplugin __P((char **));
129 static int setpassfilter __P((char **));
130 static int setactivefilter __P((char **));
134 static int setmodir __P((char **));
137 static option_t *find_option __P((const char *name));
138 static int process_option __P((option_t *, char *, char **));
139 static int n_arguments __P((option_t *));
140 static int number_option __P((char *, u_int32_t *, int));
143 * Structure to store extra lists of options.
147 struct option_list *next;
150 static struct option_list *extra_options = NULL;
155 option_t general_options[] = {
156 { "debug", o_int, &debug,
157 "Increase debugging level", OPT_INC | OPT_NOARG | 1 },
158 { "-d", o_int, &debug,
159 "Increase debugging level",
160 OPT_ALIAS | OPT_INC | OPT_NOARG | 1 },
162 { "kdebug", o_int, &kdebugflag,
163 "Set kernel driver debug level", OPT_PRIO },
165 { "nodetach", o_bool, &nodetach,
166 "Don't detach from controlling tty", OPT_PRIO | 1 },
167 { "-detach", o_bool, &nodetach,
168 "Don't detach from controlling tty", OPT_ALIAS | OPT_PRIOSUB | 1 },
169 { "updetach", o_bool, &updetach,
170 "Detach from controlling tty once link is up",
171 OPT_PRIOSUB | OPT_A2CLR | 1, &nodetach },
173 { "holdoff", o_int, &holdoff,
174 "Set time in seconds before retrying connection", OPT_PRIO },
176 { "idle", o_int, &idle_time_limit,
177 "Set time in seconds before disconnecting idle link", OPT_PRIO },
179 { "maxconnect", o_int, &maxconnect,
180 "Set connection time limit",
181 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
183 { "domain", o_special, (void *)setdomain,
184 "Add given domain name to hostname",
185 OPT_PRIO | OPT_PRIV | OPT_A2STRVAL, &domain },
187 { "file", o_special, (void *)readfile,
188 "Take options from a file", OPT_NOPRINT },
189 { "call", o_special, (void *)callfile,
190 "Take options from a privileged file", OPT_NOPRINT },
192 { "persist", o_bool, &persist,
193 "Keep on reopening connection after close", OPT_PRIO | 1 },
194 { "nopersist", o_bool, &persist,
195 "Turn off persist option", OPT_PRIOSUB },
197 { "demand", o_bool, &demand,
198 "Dial on demand", OPT_INITONLY | 1, &persist },
200 { "--version", o_special_noarg, (void *)showversion,
201 "Show version number" },
202 { "--help", o_special_noarg, (void *)showhelp,
203 "Show brief listing of options" },
204 { "-h", o_special_noarg, (void *)showhelp,
205 "Show brief listing of options", OPT_ALIAS },
207 { "logfile", o_special, (void *)setlogfile,
208 "Append log messages to this file",
209 OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, &logfile_name },
210 { "logfd", o_int, &log_to_fd,
211 "Send log messages to this file descriptor",
212 OPT_PRIOSUB | OPT_A2CLR, &log_default },
213 { "nolog", o_int, &log_to_fd,
214 "Don't send log messages to any file",
215 OPT_PRIOSUB | OPT_NOARG | OPT_VAL(-1) },
216 { "nologfd", o_int, &log_to_fd,
217 "Don't send log messages to any file descriptor",
218 OPT_PRIOSUB | OPT_ALIAS | OPT_NOARG | OPT_VAL(-1) },
220 { "linkname", o_string, linkname,
221 "Set logical name for link",
222 OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXPATHLEN },
224 { "maxfail", o_int, &maxfail,
225 "Maximum number of unsuccessful connection attempts to allow",
228 { "ktune", o_bool, &tune_kernel,
229 "Alter kernel settings as necessary", OPT_PRIO | 1 },
230 { "noktune", o_bool, &tune_kernel,
231 "Don't alter kernel settings", OPT_PRIOSUB },
233 { "connect-delay", o_int, &connect_delay,
234 "Maximum time (in ms) to wait after connect script finishes",
237 { "unit", o_int, &req_unit,
238 "PPP interface unit number to use if possible",
239 OPT_PRIO | OPT_LLIMIT, 0, 0 },
241 { "dump", o_bool, &dump_options,
242 "Print out option values after parsing all options", 1 },
243 { "dryrun", o_bool, &dryrun,
244 "Stop after parsing, printing, and checking options", 1 },
246 #ifdef HAVE_MULTILINK
247 { "multilink", o_bool, &multilink,
248 "Enable multilink operation", OPT_PRIO | 1 },
249 { "mp", o_bool, &multilink,
250 "Enable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 1 },
251 { "nomultilink", o_bool, &multilink,
252 "Disable multilink operation", OPT_PRIOSUB | 0 },
253 { "nomp", o_bool, &multilink,
254 "Disable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 0 },
256 { "bundle", o_string, &bundle_name,
257 "Bundle name for multilink", OPT_PRIO },
258 #endif /* HAVE_MULTILINK */
261 { "plugin", o_special, (void *)loadplugin,
262 "Load a plug-in module into pppd", OPT_PRIV | OPT_A2LIST },
266 { "pdebug", o_int, &dflag,
267 "libpcap debugging", OPT_PRIO },
269 { "pass-filter", 1, setpassfilter,
270 "set filter for packets to pass", OPT_PRIO },
272 { "active-filter", 1, setactivefilter,
273 "set filter for active pkts", OPT_PRIO },
277 { "maxoctets", o_int, &maxoctets,
278 "Set connection traffic limit",
279 OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
280 { "mo", o_int, &maxoctets,
281 "Set connection traffic limit",
282 OPT_ALIAS | OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF },
283 { "mo-direction", o_special, setmodir,
284 "Set direction for limit traffic (sum,in,out,max)" },
285 { "mo-timeout", o_int, &maxoctets_timeout,
286 "Check for traffic limit every N seconds", OPT_PRIO | OPT_LLIMIT | 1 },
292 #ifndef IMPLEMENTATION
293 #define IMPLEMENTATION ""
296 static char *usage_string = "\
298 Usage: %s [ options ], where options are:\n\
299 <device> Communicate over the named device\n\
300 <speed> Set the baud rate to <speed>\n\
301 <loc>:<rem> Set the local and/or remote interface IP\n\
302 addresses. Either one may be omitted.\n\
303 asyncmap <n> Set the desired async map to hex <n>\n\
304 auth Require authentication from peer\n\
305 connect <p> Invoke shell command <p> to set up the serial line\n\
306 crtscts Use hardware RTS/CTS flow control\n\
307 defaultroute Add default route through interface\n\
308 file <f> Take options from file <f>\n\
309 modem Use modem control lines\n\
310 mru <n> Set MRU value to <n> for negotiation\n\
311 See pppd(8) for more options.\n\
315 * parse_args - parse a string of arguments from the command line.
318 parse_args(argc, argv)
326 privileged_option = privileged;
327 option_source = "command line";
328 option_priority = OPRIO_CMDLINE;
332 opt = find_option(arg);
334 option_error("unrecognized option '%s'", arg);
338 n = n_arguments(opt);
340 option_error("too few parameters for option %s", arg);
343 if (!process_option(opt, arg, argv))
352 * options_from_file - Read a string of options from a file,
353 * and interpret them.
356 options_from_file(filename, must_exist, check_prot, priv)
363 int i, newline, ret, err;
368 char args[MAXARGS][MAXWORDLEN];
369 char cmd[MAXWORDLEN];
373 f = fopen(filename, "r");
380 if (err != ENOENT && err != ENOTDIR)
381 warn("Warning: can't open options file %s: %m", filename);
384 option_error("Can't open options file %s: %m", filename);
388 oldpriv = privileged_option;
389 privileged_option = priv;
390 oldsource = option_source;
391 option_source = strdup(filename);
392 if (option_source == NULL)
393 option_source = "file";
395 while (getword(f, cmd, &newline, filename)) {
396 opt = find_option(cmd);
398 option_error("In file %s: unrecognized option '%s'",
402 n = n_arguments(opt);
403 for (i = 0; i < n; ++i) {
404 if (!getword(f, args[i], &newline, filename)) {
406 "In file %s: too few parameters for option '%s'",
412 if (!process_option(opt, cmd, argv))
419 privileged_option = oldpriv;
420 option_source = oldsource;
425 * options_from_user - See if the use has a ~/.ppprc file,
426 * and if so, interpret options from it.
431 char *user, *path, *file;
436 pw = getpwuid(getuid());
437 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
439 file = _PATH_USEROPT;
440 pl = strlen(user) + strlen(file) + 2;
443 novm("init file name");
444 slprintf(path, pl, "%s/%s", user, file);
445 option_priority = OPRIO_CFGFILE;
446 ret = options_from_file(path, 0, 1, privileged);
452 * options_for_tty - See if an options file exists for the serial
453 * device, and if so, interpret options from it.
454 * We only allow the per-tty options file to override anything from
455 * the command line if it is something that the user can't override
456 * once it has been set by root; this is done by giving configuration
457 * files a lower priority than the command line.
462 char *dev, *path, *p;
467 if (strncmp(dev, "/dev/", 5) == 0)
469 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
470 return 1; /* don't look for /etc/ppp/options.tty */
471 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
474 novm("tty init file name");
475 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
476 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
477 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
480 option_priority = OPRIO_CFGFILE;
481 ret = options_from_file(path, 0, 0, 1);
487 * options_from_list - process a string of options in a wordlist.
490 options_from_list(w, priv)
499 privileged_option = priv;
500 option_source = "secrets file";
501 option_priority = OPRIO_SECFILE;
504 opt = find_option(w->word);
506 option_error("In secrets file: unrecognized option '%s'",
510 n = n_arguments(opt);
512 for (i = 0; i < n; ++i) {
516 "In secrets file: too few parameters for option '%s'",
522 if (!process_option(opt, w0->word, argv))
533 * match_option - see if this option matches an option_t structure.
536 match_option(name, opt, dowild)
541 int (*match) __P((char *, char **, int));
543 if (dowild != (opt->type == o_wild))
546 return strcmp(name, opt->name) == 0;
547 match = (int (*) __P((char *, char **, int))) opt->addr;
548 return (*match)(name, NULL, 0);
552 * find_option - scan the option lists for the various protocols
553 * looking for an entry with the given name.
554 * This could be optimized by using a hash table.
561 struct option_list *list;
564 for (dowild = 0; dowild <= 1; ++dowild) {
565 for (opt = general_options; opt->name != NULL; ++opt)
566 if (match_option(name, opt, dowild))
568 for (opt = auth_options; opt->name != NULL; ++opt)
569 if (match_option(name, opt, dowild))
571 for (list = extra_options; list != NULL; list = list->next)
572 for (opt = list->options; opt->name != NULL; ++opt)
573 if (match_option(name, opt, dowild))
575 for (opt = the_channel->options; opt->name != NULL; ++opt)
576 if (match_option(name, opt, dowild))
578 for (i = 0; protocols[i] != NULL; ++i)
579 if ((opt = protocols[i]->options) != NULL)
580 for (; opt->name != NULL; ++opt)
581 if (match_option(name, opt, dowild))
588 * process_option - process one new-style option.
591 process_option(opt, cmd, argv)
599 int (*parser) __P((char **));
600 int (*wildp) __P((char *, char **, int));
601 char *optopt = (opt->type == o_wild)? "": " option";
602 int prio = option_priority;
603 option_t *mainopt = opt;
605 if ((opt->flags & OPT_PRIVFIX) && privileged_option)
607 while (mainopt->flags & OPT_PRIOSUB)
609 if (mainopt->flags & OPT_PRIO) {
610 if (prio < mainopt->priority) {
611 /* new value doesn't override old */
612 if (prio == OPRIO_CMDLINE && mainopt->priority > OPRIO_ROOT) {
613 option_error("%s%s set in %s cannot be overridden\n",
614 opt->name, optopt, mainopt->source);
619 if (prio > OPRIO_ROOT && mainopt->priority == OPRIO_CMDLINE)
620 warn("%s%s from %s overrides command line",
621 opt->name, optopt, option_source);
624 if ((opt->flags & OPT_INITONLY) && phase != PHASE_INITIALIZE) {
625 option_error("%s%s cannot be changed after initialization",
629 if ((opt->flags & OPT_PRIV) && !privileged_option) {
630 option_error("using the %s%s requires root privilege",
634 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
635 option_error("%s%s is disabled", opt->name, optopt);
638 if ((opt->flags & OPT_DEVEQUIV) && devnam_fixed) {
639 option_error("the %s%s may not be changed in %s",
640 opt->name, optopt, option_source);
646 v = opt->flags & OPT_VALUE;
647 *(bool *)(opt->addr) = v;
648 if (opt->addr2 && (opt->flags & OPT_A2COPY))
649 *(bool *)(opt->addr2) = v;
650 else if (opt->addr2 && (opt->flags & OPT_A2CLR))
651 *(bool *)(opt->addr2) = 0;
652 else if (opt->addr2 && (opt->flags & OPT_A2CLRB))
653 *(u_char *)(opt->addr2) &= ~v;
654 else if (opt->addr2 && (opt->flags & OPT_A2OR))
655 *(u_char *)(opt->addr2) |= v;
660 if ((opt->flags & OPT_NOARG) == 0) {
661 if (!int_option(*argv, &iv))
663 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
664 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
665 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
666 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
667 switch (opt->flags & OPT_LIMITS) {
669 option_error("%s value must be%s >= %d",
670 opt->name, zok, opt->lower_limit);
673 option_error("%s value must be%s <= %d",
674 opt->name, zok, opt->upper_limit);
677 option_error("%s value must be%s between %d and %d",
678 opt->name, zok, opt->lower_limit, opt->upper_limit);
684 a = opt->flags & OPT_VALUE;
686 a -= 256; /* sign extend */
688 if (opt->flags & OPT_INC)
689 iv += *(int *)(opt->addr);
690 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
691 int oldv = *(int *)(opt->addr);
692 if ((opt->flags & OPT_ZEROINF) ?
693 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
694 option_error("%s value cannot be increased", opt->name);
698 *(int *)(opt->addr) = iv;
699 if (opt->addr2 && (opt->flags & OPT_A2COPY))
700 *(int *)(opt->addr2) = iv;
704 if (opt->flags & OPT_NOARG) {
705 v = opt->flags & OPT_VALUE;
708 } else if (!number_option(*argv, &v, 16))
710 if (opt->flags & OPT_OR)
711 v |= *(u_int32_t *)(opt->addr);
712 *(u_int32_t *)(opt->addr) = v;
713 if (opt->addr2 && (opt->flags & OPT_A2COPY))
714 *(u_int32_t *)(opt->addr2) = v;
718 if (opt->flags & OPT_STATIC) {
719 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
723 novm("option argument");
724 *(char **)(opt->addr) = sv;
728 case o_special_noarg:
730 parser = (int (*) __P((char **))) opt->addr;
731 if (!(*parser)(argv))
733 if (opt->flags & OPT_A2LIST) {
734 struct option_value *ovp, **pp;
736 ovp = malloc(sizeof(*ovp) + strlen(*argv));
738 strcpy(ovp->value, *argv);
739 ovp->source = option_source;
741 pp = (struct option_value **) &opt->addr2;
750 wildp = (int (*) __P((char *, char **, int))) opt->addr;
751 if (!(*wildp)(cmd, argv, 1))
756 if (opt->addr2 && (opt->flags & (OPT_A2COPY|OPT_ENABLE
757 |OPT_A2PRINTER|OPT_A2STRVAL|OPT_A2LIST|OPT_A2OR)) == 0)
758 *(bool *)(opt->addr2) = !(opt->flags & OPT_A2CLR);
760 mainopt->source = option_source;
761 mainopt->priority = prio;
762 mainopt->winner = opt - mainopt;
768 * override_value - if the option priorities would permit us to
769 * override the value of option, return 1 and update the priority
770 * and source of the option value. Otherwise returns 0.
773 override_value(option, priority, source)
780 opt = find_option(option);
783 while (opt->flags & OPT_PRIOSUB)
785 if ((opt->flags & OPT_PRIO) && priority < opt->priority)
787 opt->priority = priority;
788 opt->source = source;
794 * n_arguments - tell how many arguments an option takes
800 return (opt->type == o_bool || opt->type == o_special_noarg
801 || (opt->flags & OPT_NOARG))? 0: 1;
805 * add_options - add a list of options to the set we grok.
811 struct option_list *list;
813 list = malloc(sizeof(*list));
815 novm("option list entry");
817 list->next = extra_options;
818 extra_options = list;
822 * check_options - check that options are valid and consistent.
827 if (logfile_fd >= 0 && logfile_fd != log_to_fd)
832 * print_option - print out an option and its value
835 print_option(opt, mainopt, printer, arg)
836 option_t *opt, *mainopt;
837 void (*printer) __P((void *, char *, ...));
843 if (opt->flags & OPT_NOPRINT)
847 v = opt->flags & OPT_VALUE;
848 if (*(bool *)opt->addr != v)
849 /* this can happen legitimately, e.g. lock
850 option turned off for default device */
852 printer(arg, "%s", opt->name);
855 v = opt->flags & OPT_VALUE;
858 i = *(int *)opt->addr;
859 if (opt->flags & OPT_NOARG) {
860 printer(arg, "%s", opt->name);
862 if (opt->flags & OPT_INC) {
863 for (; i > v; i -= v)
864 printer(arg, " %s", opt->name);
866 printer(arg, " # oops: %d not %d\n",
870 printer(arg, "%s %d", opt->name, i);
874 printer(arg, "%s", opt->name);
875 if ((opt->flags & OPT_NOARG) == 0)
876 printer(arg, " %x", *(u_int32_t *)opt->addr);
880 if (opt->flags & OPT_HIDE) {
883 p = (char *) opt->addr;
884 if ((opt->flags & OPT_STATIC) == 0)
887 printer(arg, "%s %q", opt->name, p);
891 case o_special_noarg:
893 if (opt->type != o_wild) {
894 printer(arg, "%s", opt->name);
895 if (n_arguments(opt) == 0)
899 if (opt->flags & OPT_A2PRINTER) {
900 void (*oprt) __P((option_t *,
901 void ((*)__P((void *, char *, ...))),
903 oprt = (void (*) __P((option_t *,
904 void ((*)__P((void *, char *, ...))),
906 (*oprt)(opt, printer, arg);
907 } else if (opt->flags & OPT_A2STRVAL) {
908 p = (char *) opt->addr2;
909 if ((opt->flags & OPT_STATIC) == 0)
912 } else if (opt->flags & OPT_A2LIST) {
913 struct option_value *ovp;
915 ovp = (struct option_value *) opt->addr2;
917 printer(arg, "%q", ovp->value);
918 if ((ovp = ovp->next) == NULL)
920 printer(arg, "\t\t# (from %s)\n%s ",
921 ovp->source, opt->name);
924 printer(arg, "xxx # [don't know how to print value]");
929 printer(arg, "# %s value (type %d\?\?)", opt->name, opt->type);
932 printer(arg, "\t\t# (from %s)\n", mainopt->source);
936 * print_option_list - print out options in effect from an
940 print_option_list(opt, printer, arg)
942 void (*printer) __P((void *, char *, ...));
945 while (opt->name != NULL) {
946 if (opt->priority != OPRIO_DEFAULT
947 && opt->winner != (short int) -1)
948 print_option(opt + opt->winner, opt, printer, arg);
951 } while (opt->flags & OPT_PRIOSUB);
956 * print_options - print out what options are in effect.
959 print_options(printer, arg)
960 void (*printer) __P((void *, char *, ...));
963 struct option_list *list;
966 printer(arg, "pppd options in effect:\n");
967 print_option_list(general_options, printer, arg);
968 print_option_list(auth_options, printer, arg);
969 for (list = extra_options; list != NULL; list = list->next)
970 print_option_list(list->options, printer, arg);
971 print_option_list(the_channel->options, printer, arg);
972 for (i = 0; protocols[i] != NULL; ++i)
973 print_option_list(protocols[i]->options, printer, arg);
977 * usage - print out a message telling how to use the program.
982 if (phase == PHASE_INITIALIZE)
983 fprintf(stderr, usage_string, VERSION, progname);
987 * showhelp - print out usage message and exit.
993 if (phase == PHASE_INITIALIZE) {
1001 * showversion - print out the version number and exit.
1007 if (phase == PHASE_INITIALIZE) {
1008 fprintf(stderr, "pppd version %s\n", VERSION);
1015 * option_error - print a message about an error in an option.
1016 * The message is logged, and also sent to
1017 * stderr if phase == PHASE_INITIALIZE.
1020 option_error __V((char *fmt, ...))
1025 #if defined(__STDC__)
1026 va_start(args, fmt);
1030 fmt = va_arg(args, char *);
1032 vslprintf(buf, sizeof(buf), fmt, args);
1034 if (phase == PHASE_INITIALIZE)
1035 fprintf(stderr, "%s: %s\n", progname, buf);
1036 syslog(LOG_ERR, "%s", buf);
1041 * readable - check if a file is readable by the real user.
1054 if (fstat(fd, &sbuf) != 0)
1056 if (sbuf.st_uid == uid)
1057 return sbuf.st_mode & S_IRUSR;
1058 if (sbuf.st_gid == getgid())
1059 return sbuf.st_mode & S_IRGRP;
1060 for (i = 0; i < ngroups; ++i)
1061 if (sbuf.st_gid == groups[i])
1062 return sbuf.st_mode & S_IRGRP;
1063 return sbuf.st_mode & S_IROTH;
1068 * Read a word from a file.
1069 * Words are delimited by white-space or by quotes (" or ').
1070 * Quotes, white-space and \ may be escaped with \.
1071 * \<newline> is ignored.
1074 getword(f, word, newlinep, filename)
1081 int quoted, comment;
1082 int value, digit, got, n;
1084 #define isoctal(c) ((c) >= '0' && (c) < '8')
1092 * First skip white-space and comments.
1100 * A newline means the end of a comment; backslash-newline
1101 * is ignored. Note that we cannot have escape && comment.
1113 * Ignore characters other than newline in a comment.
1119 * If this character is escaped, we have a word start.
1125 * If this is the escape character, look at the next character.
1133 * If this is the start of a comment, ignore the rest of the line.
1141 * A non-whitespace character is the start of a word.
1148 * Save the delimiter for quoted strings.
1150 if (!escape && (c == '"' || c == '\'')) {
1157 * Process characters until the end of the word.
1162 * This character is escaped: backslash-newline is ignored,
1163 * various other characters indicate particular values
1164 * as for C backslash-escapes.
1199 * \ddd octal sequence
1202 for (n = 0; n < 3 && isoctal(c); ++n) {
1203 value = (value << 3) + (c & 07);
1212 * \x<hex_string> sequence
1216 for (n = 0; n < 2 && isxdigit(c); ++n) {
1217 digit = toupper(c) - '0';
1219 digit += '0' + 10 - 'A';
1220 value = (value << 4) + digit;
1228 * Otherwise the character stands for itself.
1235 * Store the resulting character for the escape sequence.
1237 if (len < MAXWORDLEN-1)
1248 * Not escaped: see if we've reached the end of the word.
1254 if (isspace(c) || c == '#') {
1261 * Backslash starts an escape sequence.
1270 * An ordinary character: store it in the word and get another.
1272 if (len < MAXWORDLEN-1)
1280 * End of the word: check for errors.
1286 option_error("Error reading %s: %m", filename);
1290 * If len is zero, then we didn't find a word before the
1298 * Warn if the word was too long, and append a terminating null.
1300 if (len >= MAXWORDLEN) {
1301 option_error("warning: word in file %s too long (%.20s...)",
1303 len = MAXWORDLEN - 1;
1314 * number_option - parse an unsigned numeric parameter for an option.
1317 number_option(str, valp, base)
1324 *valp = strtoul(str, &ptr, base);
1326 option_error("invalid numeric parameter '%s' for %s option",
1327 str, current_option);
1335 * int_option - like number_option, but valp is int *,
1336 * the base is assumed to be 0, and *valp is not changed
1337 * if there is an error.
1340 int_option(str, valp)
1346 if (!number_option(str, &v, 0))
1354 * The following procedures parse options.
1358 * readfile - take commands from a file.
1364 return options_from_file(*argv, 1, 1, privileged_option);
1368 * callfile - take commands from /etc/ppp/peers/<name>.
1369 * Name may not contain /../, start with / or ../, or end in /..
1375 char *fname, *arg, *p;
1380 if (arg[0] == '/' || arg[0] == 0)
1383 for (p = arg; *p != 0; ) {
1384 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1388 while (*p != '/' && *p != 0)
1395 option_error("call option value may not contain .. or start with /");
1399 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1400 if ((fname = (char *) malloc(l)) == NULL)
1401 novm("call file name");
1402 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1404 ok = options_from_file(fname, 1, 1, 1);
1412 * setpassfilter - Set the pass filter for packets
1418 pc.linktype = DLT_PPP;
1419 pc.snapshot = PPP_HDRLEN;
1421 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1423 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1428 * setactivefilter - Set the active filter for packets
1431 setactivefilter(argv)
1434 pc.linktype = DLT_PPP;
1435 pc.snapshot = PPP_HDRLEN;
1437 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1439 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1445 * setdomain - Set domain name to append to hostname
1451 gethostname(hostname, MAXNAMELEN);
1454 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1455 domain = hostname + strlen(hostname);
1456 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1458 hostname[MAXNAMELEN-1] = 0;
1469 if (!privileged_option)
1471 fd = open(*argv, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0644);
1472 if (fd < 0 && errno == EEXIST)
1473 fd = open(*argv, O_WRONLY | O_APPEND);
1475 if (!privileged_option)
1479 option_error("Can't open log file %s: %m", *argv);
1482 strlcpy(logfile_name, *argv, sizeof(logfile_name));
1483 if (logfile_fd >= 0)
1497 if(!strcmp(*argv,"in")) {
1498 maxoctets_dir = PPP_OCTETS_DIRECTION_IN;
1499 } else if (!strcmp(*argv,"out")) {
1500 maxoctets_dir = PPP_OCTETS_DIRECTION_OUT;
1501 } else if (!strcmp(*argv,"max")) {
1502 maxoctets_dir = PPP_OCTETS_DIRECTION_MAXOVERAL;
1504 maxoctets_dir = PPP_OCTETS_DIRECTION_SUM;
1518 void (*init) __P((void));
1522 if (strchr(arg, '/') == 0) {
1523 const char *base = _PATH_PLUGIN;
1524 int l = strlen(base) + strlen(arg) + 2;
1527 novm("plugin file path");
1528 strlcpy(path, base, l);
1529 strlcat(path, "/", l);
1530 strlcat(path, arg, l);
1532 handle = dlopen(path, RTLD_GLOBAL | RTLD_NOW);
1536 option_error("%s", err);
1537 option_error("Couldn't load plugin %s", arg);
1540 init = (void (*)(void))dlsym(handle, "plugin_init");
1542 option_error("%s has no initialization entry point", arg);
1545 vers = (const char *) dlsym(handle, "pppd_version");
1547 warn("Warning: plugin %s has no version information", arg);
1548 } else if (strcmp(vers, VERSION) != 0) {
1549 option_error("Plugin %s is for pppd version %s, this is %s",
1550 arg, vers, VERSION);
1553 info("Plugin %s loaded.", arg);