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 char rcsid[] = "$Id: options.c,v 1.59 1999/05/14 01:09:03 paulus Exp $";
34 #include <sys/types.h>
36 #include <netinet/in.h>
37 #include <arpa/inet.h>
40 #include <pcap-int.h> /* XXX: To get struct pcap */
44 #include "pathnames.h"
45 #include "patchlevel.h"
53 #include <net/ppp-comp.h>
55 #if defined(ultrix) || defined(NeXT)
56 char *strdup __P((char *));
60 * Option variables and default values.
63 int dflag = 0; /* Tell libpcap we want debugging */
65 int debug = 0; /* Debug flag */
66 int kdebugflag = 0; /* Tell kernel to print debug messages */
67 int default_device = 1; /* Using /dev/tty or equivalent */
68 char devnam[MAXPATHLEN]; /* Device name */
69 int crtscts = 0; /* Use hardware flow control */
70 bool modem = 1; /* Use modem control lines */
71 int inspeed = 0; /* Input/Output speed requested */
72 u_int32_t netmask = 0; /* IP netmask to set on interface */
73 bool lockflag = 0; /* Create lock file to lock the serial dev */
74 bool nodetach = 0; /* Don't detach from controlling tty */
75 bool updetach = 0; /* Detach once link is up */
76 char *connector = NULL; /* Script to establish physical link */
77 char *disconnector = NULL; /* Script to disestablish physical link */
78 char *welcomer = NULL; /* Script to run after phys link estab. */
79 char *ptycommand = NULL; /* Command to run on other side of pty */
80 int maxconnect = 0; /* Maximum connect time */
81 char user[MAXNAMELEN]; /* Username for PAP */
82 char passwd[MAXSECRETLEN]; /* Password for PAP */
83 bool persist = 0; /* Reopen link after it goes down */
84 char our_name[MAXNAMELEN]; /* Our name for authentication purposes */
85 bool demand = 0; /* do dial-on-demand */
86 char *ipparam = NULL; /* Extra parameter for ip up/down scripts */
87 int idle_time_limit = 0; /* Disconnect if idle for this many seconds */
88 int holdoff = 30; /* # seconds to pause before reconnecting */
89 bool notty = 0; /* Stdin/out is not a tty */
90 char *record_file = NULL; /* File to record chars sent/received */
92 bool sync_serial = 0; /* Device is synchronous serial device */
93 int log_to_fd = 1; /* send log messages to this fd too */
95 extern option_t auth_options[];
96 extern struct stat devstat;
97 extern int prepass; /* Doing pre-pass to find device name */
99 struct option_info connector_info;
100 struct option_info disconnector_info;
101 struct option_info welcomer_info;
102 struct option_info devnam_info;
103 struct option_info ptycommand_info;
106 struct bpf_program pass_filter;/* Filter program for packets to pass */
107 struct bpf_program active_filter; /* Filter program for link-active pkts */
108 pcap_t pc; /* Fake struct pcap so we can compile expr */
111 char *current_option; /* the name of the option being parsed */
112 int privileged_option; /* set iff the current option came from root */
113 char *option_source; /* string saying where the option came from */
118 static int setdevname __P((char *));
119 static int setipaddr __P((char *));
120 static int setspeed __P((char *));
121 static int noopt __P((char **));
122 static int setdomain __P((char **));
123 static int setnetmask __P((char **));
124 static int setxonxoff __P((char **));
125 static int readfile __P((char **));
126 static int callfile __P((char **));
127 static int showversion __P((char **));
128 static int showhelp __P((char **));
129 static void usage __P((void));
132 static int setpassfilter __P((char **));
133 static int setactivefilter __P((char **));
137 static option_t *find_option __P((char *name));
138 static int process_option __P((option_t *, char **));
139 static int n_arguments __P((option_t *));
140 static int number_option __P((char *, u_int32_t *, int));
145 option_t general_options[] = {
146 { "debug", o_int, &debug,
147 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
148 { "-d", o_int, &debug,
149 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
150 { "kdebug", o_int, &kdebugflag,
151 "Set kernel driver debug level" },
152 { "nodetach", o_bool, &nodetach,
153 "Don't detach from controlling tty", 1 },
154 { "-detach", o_bool, &nodetach,
155 "Don't detach from controlling tty", 1 },
156 { "updetach", o_bool, &updetach,
157 "Detach from controlling tty once link is up", 1 },
158 { "holdoff", o_int, &holdoff,
159 "Set time in seconds before retrying connection" },
160 { "idle", o_int, &idle_time_limit,
161 "Set time in seconds before disconnecting idle link" },
162 { "lock", o_bool, &lockflag,
163 "Lock serial device with UUCP-style lock file", 1 },
164 { "-all", o_special_noarg, noopt,
165 "Don't request/allow any LCP or IPCP options (useless)" },
166 { "connect", o_string, &connector,
167 "A program to set up a connection",
168 OPT_A2INFO | OPT_PRIVFIX, &connector_info },
169 { "disconnect", o_string, &disconnector,
170 "Program to disconnect serial device",
171 OPT_A2INFO | OPT_PRIVFIX, &disconnector_info },
172 { "welcome", o_string, &welcomer,
173 "Script to welcome client",
174 OPT_A2INFO | OPT_PRIVFIX, &welcomer_info },
175 { "pty", o_string, &ptycommand,
176 "Script to run on pseudo-tty master side",
177 OPT_A2INFO | OPT_PRIVFIX | OPT_PREPASS, &ptycommand_info },
178 { "notty", o_bool, ¬ty,
179 "Input/output is not a tty", OPT_PREPASS | 1 },
180 { "record", o_string, &record_file,
181 "Record characters sent/received to file" },
182 { "maxconnect", o_int, &maxconnect,
183 "Set connection time limit", OPT_LLIMIT|OPT_NOINCR|OPT_ZEROINF },
184 { "crtscts", o_int, &crtscts,
185 "Set hardware (RTS/CTS) flow control", OPT_NOARG|OPT_VAL(1) },
186 { "nocrtscts", o_int, &crtscts,
187 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
188 { "-crtscts", o_int, &crtscts,
189 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
190 { "cdtrcts", o_int, &crtscts,
191 "Set alternate hardware (DTR/CTS) flow control", OPT_NOARG|OPT_VAL(2) },
192 { "nocdtrcts", o_int, &crtscts,
193 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
194 { "xonxoff", o_special_noarg, setxonxoff,
195 "Set software (XON/XOFF) flow control" },
196 { "domain", o_special, setdomain,
197 "Add given domain name to hostname" },
198 { "mtu", o_int, &lcp_allowoptions[0].mru,
199 "Set our MTU", OPT_LIMITS, NULL, MAXMRU, MINMRU },
200 { "netmask", o_special, setnetmask,
202 { "modem", o_bool, &modem,
203 "Use modem control lines", 1 },
204 { "local", o_bool, &modem,
205 "Don't use modem control lines" },
206 { "file", o_special, readfile,
207 "Take options from a file", OPT_PREPASS },
208 { "call", o_special, callfile,
209 "Take options from a privileged file", OPT_PREPASS },
210 { "persist", o_bool, &persist,
211 "Keep on reopening connection after close", 1 },
212 { "nopersist", o_bool, &persist,
213 "Turn off persist option" },
214 { "demand", o_bool, &demand,
215 "Dial on demand", 1, &persist },
216 { "--version", o_special_noarg, showversion,
217 "Show version number" },
218 { "--help", o_special_noarg, showhelp,
219 "Show brief listing of options" },
220 { "-h", o_special_noarg, showhelp,
221 "Show brief listing of options" },
222 { "sync", o_bool, &sync_serial,
223 "Use synchronous HDLC serial encoding", 1 },
224 { "logfd", o_int, &log_to_fd,
225 "Send log messages to this file descriptor" },
226 { "nologfd", o_int, &log_to_fd,
227 "Don't send log messages to any file descriptor",
228 OPT_NOARG | OPT_VAL(-1) },
231 { "pdebug", o_int, &dflag,
232 "libpcap debugging" },
233 { "pass-filter", 1, setpassfilter,
234 "set filter for packets to pass" },
235 { "active-filter", 1, setactivefilter,
236 "set filter for active pkts" },
242 #ifndef IMPLEMENTATION
243 #define IMPLEMENTATION ""
246 static char *usage_string = "\
247 pppd version %s.%d%s\n\
248 Usage: %s [ options ], where options are:\n\
249 <device> Communicate over the named device\n\
250 <speed> Set the baud rate to <speed>\n\
251 <loc>:<rem> Set the local and/or remote interface IP\n\
252 addresses. Either one may be omitted.\n\
253 asyncmap <n> Set the desired async map to hex <n>\n\
254 auth Require authentication from peer\n\
255 connect <p> Invoke shell command <p> to set up the serial line\n\
256 crtscts Use hardware RTS/CTS flow control\n\
257 defaultroute Add default route through interface\n\
258 file <f> Take options from file <f>\n\
259 modem Use modem control lines\n\
260 mru <n> Set MRU value to <n> for negotiation\n\
261 See pppd(8) for more options.\n\
265 * parse_args - parse a string of arguments from the command line.
266 * If prepass is true, we are scanning for the device name and only
267 * processing a few options, so error messages are suppressed.
270 parse_args(argc, argv)
278 privileged_option = privileged;
279 option_source = "command line";
285 * First see if it's an option in the new option list.
287 opt = find_option(arg);
289 int n = n_arguments(opt);
291 option_error("too few parameters for option %s", arg);
294 current_option = arg;
295 if (!process_option(opt, argv))
303 * Maybe a tty name, speed or IP address?
305 if ((ret = setdevname(arg)) == 0
306 && (ret = setspeed(arg)) == 0
307 && (ret = setipaddr(arg)) == 0) {
308 option_error("unrecognized option '%s'", arg);
312 if (ret < 0) /* error */
320 * scan_args - scan the command line arguments to get the tty name,
321 * if specified. Also checks whether the notty or pty option was given.
324 scan_args(argc, argv)
331 privileged_option = privileged;
336 if (strcmp(arg, "notty") == 0 || strcmp(arg, "pty") == 0)
339 /* Skip options and their arguments */
340 opt = find_option(arg);
342 int n = n_arguments(opt);
348 /* Check if it's a tty name and copy it if so */
349 (void) setdevname(arg, 1);
355 * options_from_file - Read a string of options from a file,
356 * and interpret them.
359 options_from_file(filename, must_exist, check_prot, priv)
366 int i, newline, ret, err;
371 char args[MAXARGS][MAXWORDLEN];
372 char cmd[MAXWORDLEN];
376 f = fopen(filename, "r");
381 if (!must_exist && err == ENOENT)
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)) {
397 * First see if it's a command.
399 opt = find_option(cmd);
401 int n = n_arguments(opt);
402 for (i = 0; i < n; ++i) {
403 if (!getword(f, args[i], &newline, filename)) {
405 "In file %s: too few parameters for option '%s'",
411 current_option = cmd;
412 if (!process_option(opt, argv))
418 * Maybe a tty name, speed or IP address?
420 if ((i = setdevname(cmd)) == 0
421 && (i = setspeed(cmd)) == 0
422 && (i = setipaddr(cmd)) == 0) {
423 option_error("In file %s: unrecognized option '%s'",
427 if (i < 0) /* error */
434 privileged_option = oldpriv;
435 option_source = oldsource;
440 * options_from_user - See if the use has a ~/.ppprc file,
441 * and if so, interpret options from it.
446 char *user, *path, *file;
451 pw = getpwuid(getuid());
452 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
454 file = _PATH_USEROPT;
455 pl = strlen(user) + strlen(file) + 2;
458 novm("init file name");
459 slprintf(path, pl, "%s/%s", user, file);
460 ret = options_from_file(path, 0, 1, privileged);
466 * options_for_tty - See if an options file exists for the serial
467 * device, and if so, interpret options from it.
472 char *dev, *path, *p;
477 if (strncmp(dev, "/dev/", 5) == 0)
479 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
480 return 1; /* don't look for /etc/ppp/options.tty */
481 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
484 novm("tty init file name");
485 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
486 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
487 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
490 ret = options_from_file(path, 0, 0, 1);
496 * find_option - scan the option lists for the various protocols
497 * looking for an entry with the given name.
498 * This could be optimized by using a hash table.
507 for (opt = general_options; opt->name != NULL; ++opt)
508 if (strcmp(name, opt->name) == 0)
510 for (opt = auth_options; opt->name != NULL; ++opt)
511 if (strcmp(name, opt->name) == 0)
513 for (i = 0; protocols[i] != NULL; ++i)
514 if ((opt = protocols[i]->options) != NULL)
515 for (; opt->name != NULL; ++opt)
516 if (strcmp(name, opt->name) == 0)
522 * process_option - process one new-style option.
525 process_option(opt, argv)
532 int (*parser) __P((char **));
534 if (prepass && (opt->flags & OPT_PREPASS) == 0)
537 if ((opt->flags & OPT_PRIV) && !privileged_option) {
538 option_error("using the %s option requires root privilege", opt->name);
541 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
542 option_error("%s option is disabled", opt->name);
545 if ((opt->flags & OPT_PRIVFIX) && !privileged_option) {
546 struct option_info *ip = (struct option_info *) opt->addr2;
547 if (ip && ip->priv) {
548 option_error("%s option cannot be overridden", opt->name);
555 v = opt->flags & OPT_VALUE;
556 *(bool *)(opt->addr) = v;
557 if (opt->addr2 && (opt->flags & OPT_A2COPY))
558 *(bool *)(opt->addr2) = v;
563 if ((opt->flags & OPT_NOARG) == 0) {
564 if (!int_option(*argv, &iv))
566 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
567 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
568 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
569 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
570 switch (opt->flags & OPT_LIMITS) {
572 option_error("%s value must be%s >= %d",
573 opt->name, zok, opt->lower_limit);
576 option_error("%s value must be%s <= %d",
577 opt->name, zok, opt->upper_limit);
580 option_error("%s value must be%s between %d and %d",
581 opt->name, opt->lower_limit, opt->upper_limit);
587 a = opt->flags & OPT_VALUE;
589 a -= 256; /* sign extend */
591 if (opt->flags & OPT_INC)
592 iv += *(int *)(opt->addr);
593 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
594 int oldv = *(int *)(opt->addr);
595 if ((opt->flags & OPT_ZEROINF) ?
596 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
597 option_error("%s value cannot be increased", opt->name);
601 *(int *)(opt->addr) = iv;
602 if (opt->addr2 && (opt->flags & OPT_A2COPY))
603 *(int *)(opt->addr2) = iv;
607 if (opt->flags & OPT_NOARG) {
608 v = opt->flags & OPT_VALUE;
609 } else if (!number_option(*argv, &v, 16))
611 if (opt->flags & OPT_OR)
612 v |= *(u_int32_t *)(opt->addr);
613 *(u_int32_t *)(opt->addr) = v;
614 if (opt->addr2 && (opt->flags & OPT_A2COPY))
615 *(u_int32_t *)(opt->addr2) = v;
619 if (opt->flags & OPT_STATIC) {
620 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
624 novm("option argument");
625 *(char **)(opt->addr) = sv;
629 case o_special_noarg:
631 parser = (int (*) __P((char **))) opt->addr;
632 if (!(*parser)(argv))
638 if (opt->flags & OPT_A2INFO) {
639 struct option_info *ip = (struct option_info *) opt->addr2;
640 ip->priv = privileged_option;
641 ip->source = option_source;
642 } else if ((opt->flags & (OPT_A2COPY|OPT_ENABLE)) == 0)
643 *(bool *)(opt->addr2) = 1;
650 * n_arguments - tell how many arguments an option takes
656 return (opt->type == o_bool || opt->type == o_special_noarg
657 || (opt->flags & OPT_NOARG))? 0: 1;
661 * usage - print out a message telling how to use the program.
666 if (phase == PHASE_INITIALIZE)
667 fprintf(stderr, usage_string, VERSION, PATCHLEVEL, IMPLEMENTATION,
672 * showhelp - print out usage message and exit.
678 if (phase == PHASE_INITIALIZE) {
686 * showversion - print out the version number and exit.
692 if (phase == PHASE_INITIALIZE) {
693 fprintf(stderr, "pppd version %s.%d%s\n",
694 VERSION, PATCHLEVEL, IMPLEMENTATION);
701 * option_error - print a message about an error in an option.
702 * The message is logged, and also sent to
703 * stderr if phase == PHASE_INITIALIZE.
706 option_error __V((char *fmt, ...))
716 fmt = va_arg(args, char *);
722 vslprintf(buf, sizeof(buf), fmt, args);
724 if (phase == PHASE_INITIALIZE)
725 fprintf(stderr, "%s: %s\n", progname, buf);
726 syslog(LOG_ERR, "%s", buf);
731 * readable - check if a file is readable by the real user.
744 if (fstat(fd, &sbuf) != 0)
746 if (sbuf.st_uid == uid)
747 return sbuf.st_mode & S_IRUSR;
748 if (sbuf.st_gid == getgid())
749 return sbuf.st_mode & S_IRGRP;
750 for (i = 0; i < ngroups; ++i)
751 if (sbuf.st_gid == groups[i])
752 return sbuf.st_mode & S_IRGRP;
753 return sbuf.st_mode & S_IROTH;
758 * Read a word from a file.
759 * Words are delimited by white-space or by quotes (" or ').
760 * Quotes, white-space and \ may be escaped with \.
761 * \<newline> is ignored.
764 getword(f, word, newlinep, filename)
772 int value, digit, got, n;
774 #define isoctal(c) ((c) >= '0' && (c) < '8')
782 * First skip white-space and comments.
790 * A newline means the end of a comment; backslash-newline
791 * is ignored. Note that we cannot have escape && comment.
803 * Ignore characters other than newline in a comment.
809 * If this character is escaped, we have a word start.
815 * If this is the escape character, look at the next character.
823 * If this is the start of a comment, ignore the rest of the line.
831 * A non-whitespace character is the start of a word.
838 * Save the delimiter for quoted strings.
840 if (!escape && (c == '"' || c == '\'')) {
847 * Process characters until the end of the word.
852 * This character is escaped: backslash-newline is ignored,
853 * various other characters indicate particular values
854 * as for C backslash-escapes.
889 * \ddd octal sequence
892 for (n = 0; n < 3 && isoctal(c); ++n) {
893 value = (value << 3) + (c & 07);
902 * \x<hex_string> sequence
906 for (n = 0; n < 2 && isxdigit(c); ++n) {
907 digit = toupper(c) - '0';
909 digit += '0' + 10 - 'A';
910 value = (value << 4) + digit;
918 * Otherwise the character stands for itself.
925 * Store the resulting character for the escape sequence.
927 if (len < MAXWORDLEN-1)
938 * Not escaped: see if we've reached the end of the word.
944 if (isspace(c) || c == '#') {
951 * Backslash starts an escape sequence.
960 * An ordinary character: store it in the word and get another.
962 if (len < MAXWORDLEN-1)
970 * End of the word: check for errors.
976 option_error("Error reading %s: %m", filename);
980 * If len is zero, then we didn't find a word before the
988 * Warn if the word was too long, and append a terminating null.
990 if (len >= MAXWORDLEN) {
991 option_error("warning: word in file %s too long (%.20s...)",
993 len = MAXWORDLEN - 1;
1004 * number_option - parse an unsigned numeric parameter for an option.
1007 number_option(str, valp, base)
1014 *valp = strtoul(str, &ptr, base);
1016 option_error("invalid numeric parameter '%s' for %s option",
1017 str, current_option);
1025 * int_option - like number_option, but valp is int *,
1026 * the base is assumed to be 0, and *valp is not changed
1027 * if there is an error.
1030 int_option(str, valp)
1036 if (!number_option(str, &v, 0))
1044 * The following procedures parse options.
1048 * readfile - take commands from a file.
1054 return options_from_file(*argv, 1, 1, privileged_option);
1058 * callfile - take commands from /etc/ppp/peers/<name>.
1059 * Name may not contain /../, start with / or ../, or end in /..
1065 char *fname, *arg, *p;
1070 if (arg[0] == '/' || arg[0] == 0)
1073 for (p = arg; *p != 0; ) {
1074 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1078 while (*p != '/' && *p != 0)
1085 option_error("call option value may not contain .. or start with /");
1089 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1090 if ((fname = (char *) malloc(l)) == NULL)
1091 novm("call file name");
1092 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1094 ok = options_from_file(fname, 1, 1, 1);
1102 * setpdebug - Set libpcap debugging level.
1108 return int_option(*argv, &dflag);
1112 * setpassfilter - Set the pass filter for packets
1118 pc.linktype = DLT_PPP;
1119 pc.snapshot = PPP_HDRLEN;
1121 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1123 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1128 * setactivefilter - Set the active filter for packets
1131 setactivefilter(argv)
1134 pc.linktype = DLT_PPP;
1135 pc.snapshot = PPP_HDRLEN;
1137 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1139 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1145 * noopt - Disable all options.
1151 BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));
1152 BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));
1153 BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options));
1154 BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options));
1160 * setdomain - Set domain name to append to hostname
1166 if (!privileged_option) {
1167 option_error("using the domain option requires root privilege");
1170 gethostname(hostname, MAXNAMELEN);
1173 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1174 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1176 hostname[MAXNAMELEN-1] = 0;
1182 * setspeed - Set the speed.
1191 spd = strtol(arg, &ptr, 0);
1192 if (ptr == arg || *ptr != 0 || spd == 0)
1200 * setdevname - Set the device name.
1206 struct stat statbuf;
1207 char dev[MAXPATHLEN];
1212 if (strncmp("/dev/", cp, 5) != 0) {
1213 strlcpy(dev, "/dev/", sizeof(dev));
1214 strlcat(dev, cp, sizeof(dev));
1219 * Check if there is a character device by this name.
1221 if (stat(cp, &statbuf) < 0) {
1222 if (errno == ENOENT)
1224 option_error("Couldn't stat %s: %m", cp);
1227 if (!S_ISCHR(statbuf.st_mode)) {
1228 option_error("%s is not a character device", cp);
1232 if (devnam_info.priv && !privileged_option) {
1233 option_error("device name cannot be overridden");
1237 strlcpy(devnam, cp, sizeof(devnam));
1240 devnam_info.priv = privileged_option;
1241 devnam_info.source = option_source;
1248 * setipaddr - Set the IP address
1256 u_int32_t local, remote;
1257 ipcp_options *wo = &ipcp_wantoptions[0];
1260 * IP address pair separated by ":".
1262 if ((colon = strchr(arg, ':')) == NULL)
1268 * If colon first character, then no local addr.
1272 if ((local = inet_addr(arg)) == -1) {
1273 if ((hp = gethostbyname(arg)) == NULL) {
1274 option_error("unknown host: %s", arg);
1277 local = *(u_int32_t *)hp->h_addr;
1280 if (bad_ip_adrs(local)) {
1281 option_error("bad local IP address %s", ip_ntoa(local));
1285 wo->ouraddr = local;
1290 * If colon last character, then no remote addr.
1292 if (*++colon != '\0') {
1293 if ((remote = inet_addr(colon)) == -1) {
1294 if ((hp = gethostbyname(colon)) == NULL) {
1295 option_error("unknown host: %s", colon);
1298 remote = *(u_int32_t *)hp->h_addr;
1299 if (remote_name[0] == 0)
1300 strlcpy(remote_name, colon, sizeof(remote_name));
1303 if (bad_ip_adrs(remote)) {
1304 option_error("bad remote IP address %s", ip_ntoa(remote));
1308 wo->hisaddr = remote;
1316 * setnetmask - set the netmask to be used on the interface.
1327 * Unfortunately, if we use inet_addr, we can't tell whether
1328 * a result of all 1s is an error or a valid 255.255.255.255.
1334 b = strtoul(p, &endp, 0);
1337 if (b < 0 || b > 255) {
1339 /* accept e.g. 0xffffff00 */
1345 mask |= b << (n * 8);
1347 if (*p != '.' || n == 0)
1354 if (*p != 0 || (netmask & ~mask) != 0) {
1355 option_error("invalid netmask value '%s'", *argv);
1367 lcp_wantoptions[0].asyncmap |= 0x000A0000; /* escape ^S and ^Q */
1368 lcp_wantoptions[0].neg_asyncmap = 1;