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.
21 static const char rcsid[] = "$Id: options.c,v 1.62 1999/08/12 04:25:10 paulus Exp $";
35 #include <sys/types.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
41 #include <pcap-int.h> /* XXX: To get struct pcap */
45 #include "pathnames.h"
46 #include "patchlevel.h"
54 #include <net/ppp-comp.h>
56 #if defined(ultrix) || defined(NeXT)
57 char *strdup __P((char *));
61 * Option variables and default values.
64 int dflag = 0; /* Tell libpcap we want debugging */
66 int debug = 0; /* Debug flag */
67 int kdebugflag = 0; /* Tell kernel to print debug messages */
68 int default_device = 1; /* Using /dev/tty or equivalent */
69 char devnam[MAXPATHLEN]; /* Device name */
70 int crtscts = 0; /* Use hardware flow control */
71 bool modem = 1; /* Use modem control lines */
72 int inspeed = 0; /* Input/Output speed requested */
73 u_int32_t netmask = 0; /* IP netmask to set on interface */
74 bool lockflag = 0; /* Create lock file to lock the serial dev */
75 bool nodetach = 0; /* Don't detach from controlling tty */
76 bool updetach = 0; /* Detach once link is up */
77 char *initializer = NULL; /* Script to initialize physical link */
78 char *connector = NULL; /* Script to establish physical link */
79 char *disconnector = NULL; /* Script to disestablish physical link */
80 char *welcomer = NULL; /* Script to run after phys link estab. */
81 char *ptycommand = NULL; /* Command to run on other side of pty */
82 int maxconnect = 0; /* Maximum connect time */
83 char user[MAXNAMELEN]; /* Username for PAP */
84 char passwd[MAXSECRETLEN]; /* Password for PAP */
85 bool persist = 0; /* Reopen link after it goes down */
86 char our_name[MAXNAMELEN]; /* Our name for authentication purposes */
87 bool demand = 0; /* do dial-on-demand */
88 char *ipparam = NULL; /* Extra parameter for ip up/down scripts */
89 int idle_time_limit = 0; /* Disconnect if idle for this many seconds */
90 int holdoff = 30; /* # seconds to pause before reconnecting */
91 bool notty = 0; /* Stdin/out is not a tty */
92 char *record_file = NULL; /* File to record chars sent/received */
94 bool sync_serial = 0; /* Device is synchronous serial device */
95 int log_to_fd = 1; /* send log messages to this fd too */
96 int maxfail = 10; /* max # of unsuccessful connection attempts */
98 extern option_t auth_options[];
99 extern struct stat devstat;
100 extern int prepass; /* Doing pre-pass to find device name */
102 struct option_info initializer_info;
103 struct option_info connector_info;
104 struct option_info disconnector_info;
105 struct option_info welcomer_info;
106 struct option_info devnam_info;
107 struct option_info ptycommand_info;
110 struct bpf_program pass_filter;/* Filter program for packets to pass */
111 struct bpf_program active_filter; /* Filter program for link-active pkts */
112 pcap_t pc; /* Fake struct pcap so we can compile expr */
115 char *current_option; /* the name of the option being parsed */
116 int privileged_option; /* set iff the current option came from root */
117 char *option_source; /* string saying where the option came from */
118 bool log_to_file; /* log_to_fd is a file opened by us */
123 static int setdevname __P((char *));
124 static int setipaddr __P((char *));
125 static int setspeed __P((char *));
126 static int noopt __P((char **));
127 static int setdomain __P((char **));
128 static int setnetmask __P((char **));
129 static int setxonxoff __P((char **));
130 static int readfile __P((char **));
131 static int callfile __P((char **));
132 static int showversion __P((char **));
133 static int showhelp __P((char **));
134 static void usage __P((void));
135 static int setlogfile __P((char **));
138 static int setpassfilter __P((char **));
139 static int setactivefilter __P((char **));
143 static option_t *find_option __P((char *name));
144 static int process_option __P((option_t *, char **));
145 static int n_arguments __P((option_t *));
146 static int number_option __P((char *, u_int32_t *, int));
151 option_t general_options[] = {
152 { "debug", o_int, &debug,
153 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
154 { "-d", o_int, &debug,
155 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
156 { "kdebug", o_int, &kdebugflag,
157 "Set kernel driver debug level" },
158 { "nodetach", o_bool, &nodetach,
159 "Don't detach from controlling tty", 1 },
160 { "-detach", o_bool, &nodetach,
161 "Don't detach from controlling tty", 1 },
162 { "updetach", o_bool, &updetach,
163 "Detach from controlling tty once link is up", 1 },
164 { "holdoff", o_int, &holdoff,
165 "Set time in seconds before retrying connection" },
166 { "idle", o_int, &idle_time_limit,
167 "Set time in seconds before disconnecting idle link" },
168 { "lock", o_bool, &lockflag,
169 "Lock serial device with UUCP-style lock file", 1 },
170 { "-all", o_special_noarg, noopt,
171 "Don't request/allow any LCP or IPCP options (useless)" },
172 { "init", o_string, &initializer,
173 "A program to initialize the device",
174 OPT_A2INFO | OPT_PRIVFIX, &initializer_info },
175 { "connect", o_string, &connector,
176 "A program to set up a connection",
177 OPT_A2INFO | OPT_PRIVFIX, &connector_info },
178 { "disconnect", o_string, &disconnector,
179 "Program to disconnect serial device",
180 OPT_A2INFO | OPT_PRIVFIX, &disconnector_info },
181 { "welcome", o_string, &welcomer,
182 "Script to welcome client",
183 OPT_A2INFO | OPT_PRIVFIX, &welcomer_info },
184 { "pty", o_string, &ptycommand,
185 "Script to run on pseudo-tty master side",
186 OPT_A2INFO | OPT_PRIVFIX | OPT_DEVNAM, &ptycommand_info },
187 { "notty", o_bool, ¬ty,
188 "Input/output is not a tty", OPT_DEVNAM | 1 },
189 { "record", o_string, &record_file,
190 "Record characters sent/received to file" },
191 { "maxconnect", o_int, &maxconnect,
192 "Set connection time limit", OPT_LLIMIT|OPT_NOINCR|OPT_ZEROINF },
193 { "crtscts", o_int, &crtscts,
194 "Set hardware (RTS/CTS) flow control", OPT_NOARG|OPT_VAL(1) },
195 { "nocrtscts", o_int, &crtscts,
196 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
197 { "-crtscts", o_int, &crtscts,
198 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
199 { "cdtrcts", o_int, &crtscts,
200 "Set alternate hardware (DTR/CTS) flow control", OPT_NOARG|OPT_VAL(2) },
201 { "nocdtrcts", o_int, &crtscts,
202 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
203 { "xonxoff", o_special_noarg, setxonxoff,
204 "Set software (XON/XOFF) flow control" },
205 { "domain", o_special, setdomain,
206 "Add given domain name to hostname" },
207 { "mtu", o_int, &lcp_allowoptions[0].mru,
208 "Set our MTU", OPT_LIMITS, NULL, MAXMRU, MINMRU },
209 { "netmask", o_special, setnetmask,
211 { "modem", o_bool, &modem,
212 "Use modem control lines", 1 },
213 { "local", o_bool, &modem,
214 "Don't use modem control lines" },
215 { "file", o_special, readfile,
216 "Take options from a file", OPT_PREPASS },
217 { "call", o_special, callfile,
218 "Take options from a privileged file", OPT_PREPASS },
219 { "persist", o_bool, &persist,
220 "Keep on reopening connection after close", 1 },
221 { "nopersist", o_bool, &persist,
222 "Turn off persist option" },
223 { "demand", o_bool, &demand,
224 "Dial on demand", OPT_INITONLY | 1, &persist },
225 { "--version", o_special_noarg, showversion,
226 "Show version number" },
227 { "--help", o_special_noarg, showhelp,
228 "Show brief listing of options" },
229 { "-h", o_special_noarg, showhelp,
230 "Show brief listing of options" },
231 { "sync", o_bool, &sync_serial,
232 "Use synchronous HDLC serial encoding", 1 },
233 { "logfd", o_int, &log_to_fd,
234 "Send log messages to this file descriptor" },
235 { "logfile", o_special, setlogfile,
236 "Append log messages to this file" },
237 { "nolog", o_int, &log_to_fd,
238 "Don't send log messages to any file",
239 OPT_NOARG | OPT_VAL(-1) },
240 { "nologfd", o_int, &log_to_fd,
241 "Don't send log messages to any file descriptor",
242 OPT_NOARG | OPT_VAL(-1) },
243 { "maxfail", o_int, &maxfail,
244 "Maximum number of unsuccessful connection attempts to allow" },
247 { "pdebug", o_int, &dflag,
248 "libpcap debugging" },
249 { "pass-filter", 1, setpassfilter,
250 "set filter for packets to pass" },
251 { "active-filter", 1, setactivefilter,
252 "set filter for active pkts" },
258 #ifndef IMPLEMENTATION
259 #define IMPLEMENTATION ""
262 static char *usage_string = "\
263 pppd version %s.%d%s\n\
264 Usage: %s [ options ], where options are:\n\
265 <device> Communicate over the named device\n\
266 <speed> Set the baud rate to <speed>\n\
267 <loc>:<rem> Set the local and/or remote interface IP\n\
268 addresses. Either one may be omitted.\n\
269 asyncmap <n> Set the desired async map to hex <n>\n\
270 auth Require authentication from peer\n\
271 connect <p> Invoke shell command <p> to set up the serial line\n\
272 crtscts Use hardware RTS/CTS flow control\n\
273 defaultroute Add default route through interface\n\
274 file <f> Take options from file <f>\n\
275 modem Use modem control lines\n\
276 mru <n> Set MRU value to <n> for negotiation\n\
277 See pppd(8) for more options.\n\
281 * parse_args - parse a string of arguments from the command line.
282 * If prepass is true, we are scanning for the device name and only
283 * processing a few options, so error messages are suppressed.
286 parse_args(argc, argv)
294 privileged_option = privileged;
295 option_source = "command line";
301 * First see if it's an option in the new option list.
303 opt = find_option(arg);
305 int n = n_arguments(opt);
307 option_error("too few parameters for option %s", arg);
310 current_option = arg;
311 if (!process_option(opt, argv))
319 * Maybe a tty name, speed or IP address?
321 if ((ret = setdevname(arg)) == 0
322 && (ret = setspeed(arg)) == 0
323 && (ret = setipaddr(arg)) == 0) {
324 option_error("unrecognized option '%s'", arg);
328 if (ret < 0) /* error */
336 * scan_args - scan the command line arguments to get the tty name,
337 * if specified. Also checks whether the notty or pty option was given.
340 scan_args(argc, argv)
347 privileged_option = privileged;
352 if (strcmp(arg, "notty") == 0 || strcmp(arg, "pty") == 0)
355 /* Skip options and their arguments */
356 opt = find_option(arg);
358 int n = n_arguments(opt);
364 /* Check if it's a tty name and copy it if so */
365 (void) setdevname(arg, 1);
371 * options_from_file - Read a string of options from a file,
372 * and interpret them.
375 options_from_file(filename, must_exist, check_prot, priv)
382 int i, newline, ret, err;
387 char args[MAXARGS][MAXWORDLEN];
388 char cmd[MAXWORDLEN];
392 f = fopen(filename, "r");
397 if (!must_exist && err == ENOENT)
400 option_error("Can't open options file %s: %m", filename);
404 oldpriv = privileged_option;
405 privileged_option = priv;
406 oldsource = option_source;
407 option_source = strdup(filename);
408 if (option_source == NULL)
409 option_source = "file";
411 while (getword(f, cmd, &newline, filename)) {
413 * First see if it's a command.
415 opt = find_option(cmd);
417 int n = n_arguments(opt);
418 for (i = 0; i < n; ++i) {
419 if (!getword(f, args[i], &newline, filename)) {
421 "In file %s: too few parameters for option '%s'",
427 current_option = cmd;
428 if ((opt->flags & OPT_DEVEQUIV) && devnam_fixed) {
429 option_error("the %s option may not be used in the %s file",
433 if (!process_option(opt, argv))
439 * Maybe a tty name, speed or IP address?
441 if ((i = setdevname(cmd)) == 0
442 && (i = setspeed(cmd)) == 0
443 && (i = setipaddr(cmd)) == 0) {
444 option_error("In file %s: unrecognized option '%s'",
448 if (i < 0) /* error */
455 privileged_option = oldpriv;
456 option_source = oldsource;
461 * options_from_user - See if the use has a ~/.ppprc file,
462 * and if so, interpret options from it.
467 char *user, *path, *file;
472 pw = getpwuid(getuid());
473 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
475 file = _PATH_USEROPT;
476 pl = strlen(user) + strlen(file) + 2;
479 novm("init file name");
480 slprintf(path, pl, "%s/%s", user, file);
481 ret = options_from_file(path, 0, 1, privileged);
487 * options_for_tty - See if an options file exists for the serial
488 * device, and if so, interpret options from it.
493 char *dev, *path, *p;
498 if (strncmp(dev, "/dev/", 5) == 0)
500 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
501 return 1; /* don't look for /etc/ppp/options.tty */
502 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
505 novm("tty init file name");
506 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
507 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
508 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
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)
528 privileged_option = priv;
529 option_source = "secrets file";
533 * First see if it's a command.
535 opt = find_option(w->word);
537 int n = n_arguments(opt);
538 struct wordlist *w0 = w;
539 for (i = 0; i < n; ++i) {
543 "In secrets file: too few parameters for option '%s'",
549 current_option = w0->word;
550 if (!process_option(opt, argv))
556 * Maybe a tty name, speed or IP address?
558 if ((i = setdevname(w->word)) == 0
559 && (i = setspeed(w->word)) == 0
560 && (i = setipaddr(w->word)) == 0) {
561 option_error("In secrets file: unrecognized option '%s'",
565 if (i < 0) /* error */
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.
586 for (opt = general_options; opt->name != NULL; ++opt)
587 if (strcmp(name, opt->name) == 0)
589 for (opt = auth_options; opt->name != NULL; ++opt)
590 if (strcmp(name, opt->name) == 0)
592 for (i = 0; protocols[i] != NULL; ++i)
593 if ((opt = protocols[i]->options) != NULL)
594 for (; opt->name != NULL; ++opt)
595 if (strcmp(name, opt->name) == 0)
601 * process_option - process one new-style option.
604 process_option(opt, argv)
611 int (*parser) __P((char **));
613 if ((opt->flags & OPT_PREPASS) == 0 && prepass)
615 if ((opt->flags & OPT_INITONLY) && phase != PHASE_INITIALIZE) {
616 option_error("it's too late to use the %s option", opt->name);
619 if ((opt->flags & OPT_PRIV) && !privileged_option) {
620 option_error("using the %s option requires root privilege", opt->name);
623 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
624 option_error("%s option is disabled", opt->name);
627 if ((opt->flags & OPT_PRIVFIX) && !privileged_option) {
628 struct option_info *ip = (struct option_info *) opt->addr2;
629 if (ip && ip->priv) {
630 option_error("%s option cannot be overridden", opt->name);
637 v = opt->flags & OPT_VALUE;
638 *(bool *)(opt->addr) = v;
639 if (opt->addr2 && (opt->flags & OPT_A2COPY))
640 *(bool *)(opt->addr2) = v;
645 if ((opt->flags & OPT_NOARG) == 0) {
646 if (!int_option(*argv, &iv))
648 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
649 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
650 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
651 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
652 switch (opt->flags & OPT_LIMITS) {
654 option_error("%s value must be%s >= %d",
655 opt->name, zok, opt->lower_limit);
658 option_error("%s value must be%s <= %d",
659 opt->name, zok, opt->upper_limit);
662 option_error("%s value must be%s between %d and %d",
663 opt->name, opt->lower_limit, opt->upper_limit);
669 a = opt->flags & OPT_VALUE;
671 a -= 256; /* sign extend */
673 if (opt->flags & OPT_INC)
674 iv += *(int *)(opt->addr);
675 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
676 int oldv = *(int *)(opt->addr);
677 if ((opt->flags & OPT_ZEROINF) ?
678 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
679 option_error("%s value cannot be increased", opt->name);
683 *(int *)(opt->addr) = iv;
684 if (opt->addr2 && (opt->flags & OPT_A2COPY))
685 *(int *)(opt->addr2) = iv;
689 if (opt->flags & OPT_NOARG) {
690 v = opt->flags & OPT_VALUE;
691 } else if (!number_option(*argv, &v, 16))
693 if (opt->flags & OPT_OR)
694 v |= *(u_int32_t *)(opt->addr);
695 *(u_int32_t *)(opt->addr) = v;
696 if (opt->addr2 && (opt->flags & OPT_A2COPY))
697 *(u_int32_t *)(opt->addr2) = v;
701 if (opt->flags & OPT_STATIC) {
702 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
706 novm("option argument");
707 *(char **)(opt->addr) = sv;
711 case o_special_noarg:
713 parser = (int (*) __P((char **))) opt->addr;
714 if (!(*parser)(argv))
720 if (opt->flags & OPT_A2INFO) {
721 struct option_info *ip = (struct option_info *) opt->addr2;
722 ip->priv = privileged_option;
723 ip->source = option_source;
724 } else if ((opt->flags & (OPT_A2COPY|OPT_ENABLE)) == 0)
725 *(bool *)(opt->addr2) = 1;
732 * n_arguments - tell how many arguments an option takes
738 return (opt->type == o_bool || opt->type == o_special_noarg
739 || (opt->flags & OPT_NOARG))? 0: 1;
743 * usage - print out a message telling how to use the program.
748 if (phase == PHASE_INITIALIZE)
749 fprintf(stderr, usage_string, VERSION, PATCHLEVEL, IMPLEMENTATION,
754 * showhelp - print out usage message and exit.
760 if (phase == PHASE_INITIALIZE) {
768 * showversion - print out the version number and exit.
774 if (phase == PHASE_INITIALIZE) {
775 fprintf(stderr, "pppd version %s.%d%s\n",
776 VERSION, PATCHLEVEL, IMPLEMENTATION);
783 * option_error - print a message about an error in an option.
784 * The message is logged, and also sent to
785 * stderr if phase == PHASE_INITIALIZE.
788 option_error __V((char *fmt, ...))
798 fmt = va_arg(args, char *);
804 vslprintf(buf, sizeof(buf), fmt, args);
806 if (phase == PHASE_INITIALIZE)
807 fprintf(stderr, "%s: %s\n", progname, buf);
808 syslog(LOG_ERR, "%s", buf);
813 * readable - check if a file is readable by the real user.
826 if (fstat(fd, &sbuf) != 0)
828 if (sbuf.st_uid == uid)
829 return sbuf.st_mode & S_IRUSR;
830 if (sbuf.st_gid == getgid())
831 return sbuf.st_mode & S_IRGRP;
832 for (i = 0; i < ngroups; ++i)
833 if (sbuf.st_gid == groups[i])
834 return sbuf.st_mode & S_IRGRP;
835 return sbuf.st_mode & S_IROTH;
840 * Read a word from a file.
841 * Words are delimited by white-space or by quotes (" or ').
842 * Quotes, white-space and \ may be escaped with \.
843 * \<newline> is ignored.
846 getword(f, word, newlinep, filename)
854 int value, digit, got, n;
856 #define isoctal(c) ((c) >= '0' && (c) < '8')
864 * First skip white-space and comments.
872 * A newline means the end of a comment; backslash-newline
873 * is ignored. Note that we cannot have escape && comment.
885 * Ignore characters other than newline in a comment.
891 * If this character is escaped, we have a word start.
897 * If this is the escape character, look at the next character.
905 * If this is the start of a comment, ignore the rest of the line.
913 * A non-whitespace character is the start of a word.
920 * Save the delimiter for quoted strings.
922 if (!escape && (c == '"' || c == '\'')) {
929 * Process characters until the end of the word.
934 * This character is escaped: backslash-newline is ignored,
935 * various other characters indicate particular values
936 * as for C backslash-escapes.
971 * \ddd octal sequence
974 for (n = 0; n < 3 && isoctal(c); ++n) {
975 value = (value << 3) + (c & 07);
984 * \x<hex_string> sequence
988 for (n = 0; n < 2 && isxdigit(c); ++n) {
989 digit = toupper(c) - '0';
991 digit += '0' + 10 - 'A';
992 value = (value << 4) + digit;
1000 * Otherwise the character stands for itself.
1007 * Store the resulting character for the escape sequence.
1009 if (len < MAXWORDLEN-1)
1020 * Not escaped: see if we've reached the end of the word.
1026 if (isspace(c) || c == '#') {
1033 * Backslash starts an escape sequence.
1042 * An ordinary character: store it in the word and get another.
1044 if (len < MAXWORDLEN-1)
1052 * End of the word: check for errors.
1058 option_error("Error reading %s: %m", filename);
1062 * If len is zero, then we didn't find a word before the
1070 * Warn if the word was too long, and append a terminating null.
1072 if (len >= MAXWORDLEN) {
1073 option_error("warning: word in file %s too long (%.20s...)",
1075 len = MAXWORDLEN - 1;
1086 * number_option - parse an unsigned numeric parameter for an option.
1089 number_option(str, valp, base)
1096 *valp = strtoul(str, &ptr, base);
1098 option_error("invalid numeric parameter '%s' for %s option",
1099 str, current_option);
1107 * int_option - like number_option, but valp is int *,
1108 * the base is assumed to be 0, and *valp is not changed
1109 * if there is an error.
1112 int_option(str, valp)
1118 if (!number_option(str, &v, 0))
1126 * The following procedures parse options.
1130 * readfile - take commands from a file.
1136 return options_from_file(*argv, 1, 1, privileged_option);
1140 * callfile - take commands from /etc/ppp/peers/<name>.
1141 * Name may not contain /../, start with / or ../, or end in /..
1147 char *fname, *arg, *p;
1152 if (arg[0] == '/' || arg[0] == 0)
1155 for (p = arg; *p != 0; ) {
1156 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1160 while (*p != '/' && *p != 0)
1167 option_error("call option value may not contain .. or start with /");
1171 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1172 if ((fname = (char *) malloc(l)) == NULL)
1173 novm("call file name");
1174 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1176 ok = options_from_file(fname, 1, 1, 1);
1184 * setpdebug - Set libpcap debugging level.
1190 return int_option(*argv, &dflag);
1194 * setpassfilter - Set the pass filter for packets
1200 pc.linktype = DLT_PPP;
1201 pc.snapshot = PPP_HDRLEN;
1203 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1205 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1210 * setactivefilter - Set the active filter for packets
1213 setactivefilter(argv)
1216 pc.linktype = DLT_PPP;
1217 pc.snapshot = PPP_HDRLEN;
1219 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1221 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1227 * noopt - Disable all options.
1233 BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));
1234 BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));
1235 BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options));
1236 BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options));
1242 * setdomain - Set domain name to append to hostname
1248 if (!privileged_option) {
1249 option_error("using the domain option requires root privilege");
1252 gethostname(hostname, MAXNAMELEN);
1255 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1256 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1258 hostname[MAXNAMELEN-1] = 0;
1264 * setspeed - Set the speed.
1273 spd = strtol(arg, &ptr, 0);
1274 if (ptr == arg || *ptr != 0 || spd == 0)
1282 * setdevname - Set the device name.
1288 struct stat statbuf;
1289 char dev[MAXPATHLEN];
1294 if (strncmp("/dev/", cp, 5) != 0) {
1295 strlcpy(dev, "/dev/", sizeof(dev));
1296 strlcat(dev, cp, sizeof(dev));
1301 * Check if there is a character device by this name.
1303 if (stat(cp, &statbuf) < 0) {
1304 if (errno == ENOENT)
1306 option_error("Couldn't stat %s: %m", cp);
1309 if (!S_ISCHR(statbuf.st_mode)) {
1310 option_error("%s is not a character device", cp);
1314 if (phase != PHASE_INITIALIZE) {
1315 option_error("device name cannot be changed after initialization");
1317 } else if (devnam_fixed) {
1318 option_error("per-tty options file may not specify device name");
1322 if (devnam_info.priv && !privileged_option) {
1323 option_error("device name cannot be overridden");
1327 strlcpy(devnam, cp, sizeof(devnam));
1330 devnam_info.priv = privileged_option;
1331 devnam_info.source = option_source;
1338 * setipaddr - Set the IP address
1346 u_int32_t local, remote;
1347 ipcp_options *wo = &ipcp_wantoptions[0];
1350 * IP address pair separated by ":".
1352 if ((colon = strchr(arg, ':')) == NULL)
1358 * If colon first character, then no local addr.
1362 if ((local = inet_addr(arg)) == -1) {
1363 if ((hp = gethostbyname(arg)) == NULL) {
1364 option_error("unknown host: %s", arg);
1367 local = *(u_int32_t *)hp->h_addr;
1370 if (bad_ip_adrs(local)) {
1371 option_error("bad local IP address %s", ip_ntoa(local));
1375 wo->ouraddr = local;
1380 * If colon last character, then no remote addr.
1382 if (*++colon != '\0') {
1383 if ((remote = inet_addr(colon)) == -1) {
1384 if ((hp = gethostbyname(colon)) == NULL) {
1385 option_error("unknown host: %s", colon);
1388 remote = *(u_int32_t *)hp->h_addr;
1389 if (remote_name[0] == 0)
1390 strlcpy(remote_name, colon, sizeof(remote_name));
1393 if (bad_ip_adrs(remote)) {
1394 option_error("bad remote IP address %s", ip_ntoa(remote));
1398 wo->hisaddr = remote;
1406 * setnetmask - set the netmask to be used on the interface.
1417 * Unfortunately, if we use inet_addr, we can't tell whether
1418 * a result of all 1s is an error or a valid 255.255.255.255.
1424 b = strtoul(p, &endp, 0);
1427 if (b < 0 || b > 255) {
1429 /* accept e.g. 0xffffff00 */
1435 mask |= b << (n * 8);
1437 if (*p != '.' || n == 0)
1444 if (*p != 0 || (netmask & ~mask) != 0) {
1445 option_error("invalid netmask value '%s'", *argv);
1457 lcp_wantoptions[0].asyncmap |= 0x000A0000; /* escape ^S and ^Q */
1458 lcp_wantoptions[0].neg_asyncmap = 1;
1470 if (!privileged_option)
1472 fd = open(*argv, O_WRONLY | O_APPEND);
1474 if (!privileged_option)
1478 option_error("Can't open log file %s: %m", *argv);
1481 if (log_to_file && log_to_fd >= 0)