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 1.56 1999/03/30 06:33:08 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 */
94 extern option_t auth_options[];
96 struct option_info connector_info;
97 struct option_info disconnector_info;
98 struct option_info welcomer_info;
99 struct option_info devnam_info;
100 struct option_info ptycommand_info;
103 struct bpf_program pass_filter;/* Filter program for packets to pass */
104 struct bpf_program active_filter; /* Filter program for link-active pkts */
105 pcap_t pc; /* Fake struct pcap so we can compile expr */
111 static int setdevname __P((char *, int));
112 static int setipaddr __P((char *));
113 static int setspeed __P((char *));
114 static int noopt __P((char **));
115 static int setdomain __P((char **));
116 static int setnetmask __P((char **));
117 static int setxonxoff __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));
125 static int setpassfilter __P((char **));
126 static int setactivefilter __P((char **));
130 static option_t *find_option __P((char *name));
131 static int process_option __P((option_t *, char **));
132 static int n_arguments __P((option_t *));
133 static int number_option __P((char *, u_int32_t *, int));
138 option_t general_options[] = {
139 { "debug", o_int, &debug,
140 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
141 { "-d", o_int, &debug,
142 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
143 { "kdebug", o_int, &kdebugflag,
144 "Set kernel driver debug level" },
145 { "nodetach", o_bool, &nodetach,
146 "Don't detach from controlling tty", 1 },
147 { "-detach", o_bool, &nodetach,
148 "Don't detach from controlling tty", 1 },
149 { "updetach", o_bool, &updetach,
150 "Detach from controlling tty once link is up", 1 },
151 { "holdoff", o_int, &holdoff,
152 "Set time in seconds before retrying connection" },
153 { "idle", o_int, &idle_time_limit,
154 "Set time in seconds before disconnecting idle link" },
155 { "lock", o_bool, &lockflag,
156 "Lock serial device with UUCP-style lock file", 1 },
157 { "-all", o_special_noarg, noopt,
158 "Don't request/allow any LCP or IPCP options (useless)" },
159 { "connect", o_string, &connector,
160 "A program to set up a connection",
161 OPT_A2INFO | OPT_PRIVFIX, &connector_info },
162 { "disconnect", o_string, &disconnector,
163 "Program to disconnect serial device",
164 OPT_A2INFO | OPT_PRIVFIX, &disconnector_info },
165 { "welcome", o_string, &welcomer,
166 "Script to welcome client",
167 OPT_A2INFO | OPT_PRIVFIX, &welcomer_info },
168 { "pty", o_string, &ptycommand,
169 "Script to run on pseudo-tty master side",
170 OPT_A2INFO | OPT_PRIVFIX, &ptycommand_info },
171 { "notty", o_bool, ¬ty,
172 "Input/output is not a tty", 1 },
173 { "record", o_string, &record_file,
174 "Record characters sent/received to file" },
175 { "maxconnect", o_int, &maxconnect,
176 "Set connection time limit", OPT_LLIMIT|OPT_NOINCR|OPT_ZEROINF },
177 { "crtscts", o_int, &crtscts,
178 "Set hardware (RTS/CTS) flow control", OPT_NOARG|OPT_VAL(1) },
179 { "nocrtscts", o_int, &crtscts,
180 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
181 { "-crtscts", o_int, &crtscts,
182 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
183 { "cdtrcts", o_int, &crtscts,
184 "Set alternate hardware (DTR/CTS) flow control", OPT_NOARG|OPT_VAL(2) },
185 { "nocdtrcts", o_int, &crtscts,
186 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
187 { "xonxoff", o_special_noarg, setxonxoff,
188 "Set software (XON/XOFF) flow control" },
189 { "domain", o_special, setdomain,
190 "Add given domain name to hostname" },
191 { "mtu", o_int, &lcp_allowoptions[0].mru,
192 "Set our MTU", OPT_LIMITS, NULL, MAXMRU, MINMRU },
193 { "netmask", o_special, setnetmask,
195 { "modem", o_bool, &modem,
196 "Use modem control lines", 1 },
197 { "local", o_bool, &modem,
198 "Don't use modem control lines" },
199 { "file", o_special, readfile,
200 "Take options from a file" },
201 { "call", o_special, callfile,
202 "Take options from a privileged file" },
203 { "persist", o_bool, &persist,
204 "Keep on reopening connection after close", 1 },
205 { "nopersist", o_bool, &persist,
206 "Turn off persist option" },
207 { "demand", o_bool, &demand,
208 "Dial on demand", 1, &persist },
209 { "--version", o_special_noarg, showversion,
210 "Show version number" },
211 { "--help", o_special_noarg, showhelp,
212 "Show brief listing of options" },
213 { "-h", o_special_noarg, showhelp,
214 "Show brief listing of options" },
215 { "sync", o_bool, &sync_serial,
216 "Use synchronous HDLC serial encoding", 1 },
219 { "pdebug", o_int, &dflag,
220 "libpcap debugging" },
221 { "pass-filter", 1, setpassfilter,
222 "set filter for packets to pass" },
223 { "active-filter", 1, setactivefilter,
224 "set filter for active pkts" },
230 #ifndef IMPLEMENTATION
231 #define IMPLEMENTATION ""
234 static char *usage_string = "\
235 pppd version %s.%d%s\n\
236 Usage: %s [ options ], where options are:\n\
237 <device> Communicate over the named device\n\
238 <speed> Set the baud rate to <speed>\n\
239 <loc>:<rem> Set the local and/or remote interface IP\n\
240 addresses. Either one may be omitted.\n\
241 asyncmap <n> Set the desired async map to hex <n>\n\
242 auth Require authentication from peer\n\
243 connect <p> Invoke shell command <p> to set up the serial line\n\
244 crtscts Use hardware RTS/CTS flow control\n\
245 defaultroute Add default route through interface\n\
246 file <f> Take options from file <f>\n\
247 modem Use modem control lines\n\
248 mru <n> Set MRU value to <n> for negotiation\n\
249 See pppd(8) for more options.\n\
253 * parse_args - parse a string of arguments from the command line.
256 parse_args(argc, argv)
264 privileged_option = privileged;
265 option_source = "command line";
271 * First see if it's an option in the new option list.
273 opt = find_option(arg);
275 int n = n_arguments(opt);
277 option_error("too few parameters for option %s", arg);
280 current_option = arg;
281 if (!process_option(opt, argv))
289 * Maybe a tty name, speed or IP address?
291 if ((ret = setdevname(arg, 0)) == 0
292 && (ret = setspeed(arg)) == 0
293 && (ret = setipaddr(arg)) == 0) {
294 option_error("unrecognized option '%s'", arg);
298 if (ret < 0) /* error */
305 * scan_args - scan the command line arguments to get the tty name,
306 * if specified. Also checks whether the notty or pty option was given.
309 scan_args(argc, argv)
316 privileged_option = privileged;
321 if (strcmp(arg, "notty") == 0 || strcmp(arg, "pty") == 0)
324 /* Skip options and their arguments */
325 opt = find_option(arg);
327 int n = n_arguments(opt);
333 /* Check if it's a tty name and copy it if so */
334 (void) setdevname(arg, 1);
339 * options_from_file - Read a string of options from a file,
340 * and interpret them.
343 options_from_file(filename, must_exist, check_prot, priv)
355 char args[MAXARGS][MAXWORDLEN];
356 char cmd[MAXWORDLEN];
360 f = fopen(filename, "r");
364 if (!must_exist && errno == ENOENT)
366 option_error("Can't open options file %s: %m", filename);
370 oldpriv = privileged_option;
371 privileged_option = priv;
372 oldsource = option_source;
373 option_source = strdup(filename);
374 if (option_source == NULL)
375 option_source = "file";
377 while (getword(f, cmd, &newline, filename)) {
379 * First see if it's a command.
381 opt = find_option(cmd);
383 int n = n_arguments(opt);
384 for (i = 0; i < n; ++i) {
385 if (!getword(f, args[i], &newline, filename)) {
387 "In file %s: too few parameters for option '%s'",
393 current_option = cmd;
394 if (!process_option(opt, argv))
400 * Maybe a tty name, speed or IP address?
402 if ((i = setdevname(cmd, 0)) == 0
403 && (i = setspeed(cmd)) == 0
404 && (i = setipaddr(cmd)) == 0) {
405 option_error("In file %s: unrecognized option '%s'",
409 if (i < 0) /* error */
416 privileged_option = oldpriv;
417 option_source = oldsource;
422 * options_from_user - See if the use has a ~/.ppprc file,
423 * and if so, interpret options from it.
428 char *user, *path, *file;
433 pw = getpwuid(getuid());
434 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
436 file = _PATH_USEROPT;
437 pl = strlen(user) + strlen(file) + 2;
440 novm("init file name");
441 slprintf(path, pl, "%s/%s", user, file);
442 ret = options_from_file(path, 0, 1, privileged);
448 * options_for_tty - See if an options file exists for the serial
449 * device, and if so, interpret options from it.
454 char *dev, *path, *p;
459 if (strncmp(dev, "/dev/", 5) == 0)
461 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
462 return 1; /* don't look for /etc/ppp/options.tty */
463 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
466 novm("tty init file name");
467 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
468 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
469 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
472 ret = options_from_file(path, 0, 0, 1);
478 * find_option - scan the option lists for the various protocols
479 * looking for an entry with the given name.
480 * This could be optimized by using a hash table.
489 for (opt = general_options; opt->name != NULL; ++opt)
490 if (strcmp(name, opt->name) == 0)
492 for (opt = auth_options; opt->name != NULL; ++opt)
493 if (strcmp(name, opt->name) == 0)
495 for (i = 0; protocols[i] != NULL; ++i)
496 if ((opt = protocols[i]->options) != NULL)
497 for (; opt->name != NULL; ++opt)
498 if (strcmp(name, opt->name) == 0)
504 * process_option - process one new-style option.
507 process_option(opt, argv)
514 int (*parser) __P((char **));
516 if ((opt->flags & OPT_PRIV) && !privileged_option) {
517 option_error("using the %s option requires root privilege", opt->name);
520 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
521 option_error("%s option is disabled", opt->name);
524 if ((opt->flags & OPT_PRIVFIX) && !privileged_option) {
525 struct option_info *ip = (struct option_info *) opt->addr2;
526 if (ip && ip->priv) {
527 option_error("%s option cannot be overridden", opt->name);
534 v = opt->flags & OPT_VALUE;
535 *(bool *)(opt->addr) = v;
536 if (opt->addr2 && (opt->flags & OPT_A2COPY))
537 *(bool *)(opt->addr2) = v;
542 if ((opt->flags & OPT_NOARG) == 0) {
543 if (!int_option(*argv, &iv))
545 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
546 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
547 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
548 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
549 switch (opt->flags & OPT_LIMITS) {
551 option_error("%s value must be%s >= %d",
552 opt->name, zok, opt->lower_limit);
555 option_error("%s value must be%s <= %d",
556 opt->name, zok, opt->upper_limit);
559 option_error("%s value must be%s between %d and %d",
560 opt->name, opt->lower_limit, opt->upper_limit);
566 a = opt->flags & OPT_VALUE;
568 a -= 256; /* sign extend */
570 if (opt->flags & OPT_INC)
571 iv += *(int *)(opt->addr);
572 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
573 int oldv = *(int *)(opt->addr);
574 if ((opt->flags & OPT_ZEROINF) ?
575 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
576 option_error("%s value cannot be increased", opt->name);
580 *(int *)(opt->addr) = iv;
581 if (opt->addr2 && (opt->flags & OPT_A2COPY))
582 *(int *)(opt->addr2) = iv;
586 if (opt->flags & OPT_NOARG) {
587 v = opt->flags & OPT_VALUE;
588 } else if (!number_option(*argv, &v, 16))
590 if (opt->flags & OPT_OR)
591 v |= *(u_int32_t *)(opt->addr);
592 *(u_int32_t *)(opt->addr) = v;
593 if (opt->addr2 && (opt->flags & OPT_A2COPY))
594 *(u_int32_t *)(opt->addr2) = v;
598 if (opt->flags & OPT_STATIC) {
599 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
603 novm("option argument");
604 *(char **)(opt->addr) = sv;
608 case o_special_noarg:
610 parser = (int (*) __P((char **))) opt->addr;
611 if (!(*parser)(argv))
617 if (opt->flags & OPT_A2INFO) {
618 struct option_info *ip = (struct option_info *) opt->addr2;
619 ip->priv = privileged_option;
620 ip->source = option_source;
621 } else if ((opt->flags & (OPT_A2COPY|OPT_ENABLE)) == 0)
622 *(bool *)(opt->addr2) = 1;
629 * n_arguments - tell how many arguments an option takes
635 return (opt->type == o_bool || opt->type == o_special_noarg
636 || (opt->flags & OPT_NOARG))? 0: 1;
640 * usage - print out a message telling how to use the program.
645 if (phase == PHASE_INITIALIZE)
646 fprintf(stderr, usage_string, VERSION, PATCHLEVEL, IMPLEMENTATION,
651 * showhelp - print out usage message and exit.
657 if (phase == PHASE_INITIALIZE) {
665 * showversion - print out the version number and exit.
671 if (phase == PHASE_INITIALIZE) {
672 fprintf(stderr, "pppd version %s.%d%s\n",
673 VERSION, PATCHLEVEL, IMPLEMENTATION);
680 * option_error - print a message about an error in an option.
681 * The message is logged, and also sent to
682 * stderr if phase == PHASE_INITIALIZE.
685 option_error __V((char *fmt, ...))
695 fmt = va_arg(args, char *);
697 vslprintf(buf, sizeof(buf), fmt, args);
699 if (phase == PHASE_INITIALIZE)
700 fprintf(stderr, "%s: %s\n", progname, buf);
701 syslog(LOG_ERR, "%s", buf);
706 * readable - check if a file is readable by the real user.
719 if (fstat(fd, &sbuf) != 0)
721 if (sbuf.st_uid == uid)
722 return sbuf.st_mode & S_IRUSR;
723 if (sbuf.st_gid == getgid())
724 return sbuf.st_mode & S_IRGRP;
725 for (i = 0; i < ngroups; ++i)
726 if (sbuf.st_gid == groups[i])
727 return sbuf.st_mode & S_IRGRP;
728 return sbuf.st_mode & S_IROTH;
733 * Read a word from a file.
734 * Words are delimited by white-space or by quotes (" or ').
735 * Quotes, white-space and \ may be escaped with \.
736 * \<newline> is ignored.
739 getword(f, word, newlinep, filename)
747 int value, digit, got, n;
749 #define isoctal(c) ((c) >= '0' && (c) < '8')
757 * First skip white-space and comments.
765 * A newline means the end of a comment; backslash-newline
766 * is ignored. Note that we cannot have escape && comment.
778 * Ignore characters other than newline in a comment.
784 * If this character is escaped, we have a word start.
790 * If this is the escape character, look at the next character.
798 * If this is the start of a comment, ignore the rest of the line.
806 * A non-whitespace character is the start of a word.
813 * Save the delimiter for quoted strings.
815 if (!escape && (c == '"' || c == '\'')) {
822 * Process characters until the end of the word.
827 * This character is escaped: backslash-newline is ignored,
828 * various other characters indicate particular values
829 * as for C backslash-escapes.
864 * \ddd octal sequence
867 for (n = 0; n < 3 && isoctal(c); ++n) {
868 value = (value << 3) + (c & 07);
877 * \x<hex_string> sequence
881 for (n = 0; n < 2 && isxdigit(c); ++n) {
882 digit = toupper(c) - '0';
884 digit += '0' + 10 - 'A';
885 value = (value << 4) + digit;
893 * Otherwise the character stands for itself.
900 * Store the resulting character for the escape sequence.
902 if (len < MAXWORDLEN-1)
913 * Not escaped: see if we've reached the end of the word.
919 if (isspace(c) || c == '#') {
926 * Backslash starts an escape sequence.
935 * An ordinary character: store it in the word and get another.
937 if (len < MAXWORDLEN-1)
945 * End of the word: check for errors.
951 option_error("Error reading %s: %m", filename);
955 * If len is zero, then we didn't find a word before the
963 * Warn if the word was too long, and append a terminating null.
965 if (len >= MAXWORDLEN) {
966 option_error("warning: word in file %s too long (%.20s...)",
968 len = MAXWORDLEN - 1;
979 * number_option - parse an unsigned numeric parameter for an option.
982 number_option(str, valp, base)
989 *valp = strtoul(str, &ptr, base);
991 option_error("invalid numeric parameter '%s' for %s option",
992 str, current_option);
1000 * int_option - like number_option, but valp is int *,
1001 * the base is assumed to be 0, and *valp is not changed
1002 * if there is an error.
1005 int_option(str, valp)
1011 if (!number_option(str, &v, 0))
1019 * The following procedures parse options.
1023 * readfile - take commands from a file.
1029 return options_from_file(*argv, 1, 1, privileged_option);
1033 * callfile - take commands from /etc/ppp/peers/<name>.
1034 * Name may not contain /../, start with / or ../, or end in /..
1040 char *fname, *arg, *p;
1045 if (arg[0] == '/' || arg[0] == 0)
1048 for (p = arg; *p != 0; ) {
1049 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1053 while (*p != '/' && *p != 0)
1060 option_error("call option value may not contain .. or start with /");
1064 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1065 if ((fname = (char *) malloc(l)) == NULL)
1066 novm("call file name");
1067 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1069 ok = options_from_file(fname, 1, 1, 1);
1077 * setpdebug - Set libpcap debugging level.
1083 return int_option(*argv, &dflag);
1087 * setpassfilter - Set the pass filter for packets
1093 pc.linktype = DLT_PPP;
1094 pc.snapshot = PPP_HDRLEN;
1096 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1098 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1103 * setactivefilter - Set the active filter for packets
1106 setactivefilter(argv)
1109 pc.linktype = DLT_PPP;
1110 pc.snapshot = PPP_HDRLEN;
1112 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1114 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1120 * noopt - Disable all options.
1126 BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));
1127 BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));
1128 BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options));
1129 BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options));
1135 * setdomain - Set domain name to append to hostname
1141 if (!privileged_option) {
1142 option_error("using the domain option requires root privilege");
1145 gethostname(hostname, MAXNAMELEN);
1148 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1149 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1151 hostname[MAXNAMELEN-1] = 0;
1157 * setspeed - Set the speed.
1166 spd = strtol(arg, &ptr, 0);
1167 if (ptr == arg || *ptr != 0 || spd == 0)
1175 * setdevname - Set the device name.
1178 setdevname(cp, quiet)
1182 struct stat statbuf;
1183 char dev[MAXPATHLEN];
1188 if (strncmp("/dev/", cp, 5) != 0) {
1189 strlcpy(dev, "/dev/", sizeof(dev));
1190 strlcat(dev, cp, sizeof(dev));
1195 * Check if there is a device by this name.
1197 if (stat(cp, &statbuf) < 0) {
1198 if (errno == ENOENT || quiet)
1200 option_error("Couldn't stat %s: %m", cp);
1204 if (devnam_info.priv && !privileged_option) {
1206 option_error("device name cannot be overridden");
1210 strlcpy(devnam, cp, sizeof(devnam));
1212 devnam_info.priv = privileged_option;
1213 devnam_info.source = option_source;
1220 * setipaddr - Set the IP address
1228 u_int32_t local, remote;
1229 ipcp_options *wo = &ipcp_wantoptions[0];
1232 * IP address pair separated by ":".
1234 if ((colon = strchr(arg, ':')) == NULL)
1238 * If colon first character, then no local addr.
1242 if ((local = inet_addr(arg)) == -1) {
1243 if ((hp = gethostbyname(arg)) == NULL) {
1244 option_error("unknown host: %s", arg);
1247 local = *(u_int32_t *)hp->h_addr;
1250 if (bad_ip_adrs(local)) {
1251 option_error("bad local IP address %s", ip_ntoa(local));
1255 wo->ouraddr = local;
1260 * If colon last character, then no remote addr.
1262 if (*++colon != '\0') {
1263 if ((remote = inet_addr(colon)) == -1) {
1264 if ((hp = gethostbyname(colon)) == NULL) {
1265 option_error("unknown host: %s", colon);
1268 remote = *(u_int32_t *)hp->h_addr;
1269 if (remote_name[0] == 0)
1270 strlcpy(remote_name, colon, sizeof(remote_name));
1273 if (bad_ip_adrs(remote)) {
1274 option_error("bad remote IP address %s", ip_ntoa(remote));
1278 wo->hisaddr = remote;
1286 * setnetmask - set the netmask to be used on the interface.
1297 * Unfortunately, if we use inet_addr, we can't tell whether
1298 * a result of all 1s is an error or a valid 255.255.255.255.
1304 b = strtoul(p, &endp, 0);
1307 if (b < 0 || b > 255) {
1309 /* accept e.g. 0xffffff00 */
1315 mask |= b << (n * 8);
1317 if (*p != '.' || n == 0)
1324 if (*p != 0 || (netmask & ~mask) != 0) {
1325 option_error("invalid netmask value '%s'", *argv);
1337 lcp_wantoptions[0].asyncmap |= 0x000A0000; /* escape ^S and ^Q */
1338 lcp_wantoptions[0].neg_asyncmap = 1;