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 1.55 1999/03/24 05:05:24 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 */
93 extern option_t auth_options[];
95 struct option_info connector_info;
96 struct option_info disconnector_info;
97 struct option_info welcomer_info;
98 struct option_info devnam_info;
99 struct option_info ptycommand_info;
102 struct bpf_program pass_filter;/* Filter program for packets to pass */
103 struct bpf_program active_filter; /* Filter program for link-active pkts */
104 pcap_t pc; /* Fake struct pcap so we can compile expr */
110 static int setdevname __P((char *, int));
111 static int setipaddr __P((char *));
112 static int setspeed __P((char *));
113 static int noopt __P((char **));
114 static int setdomain __P((char **));
115 static int setnetmask __P((char **));
116 static int setxonxoff __P((char **));
117 static int readfile __P((char **));
118 static int callfile __P((char **));
119 static int showversion __P((char **));
120 static int showhelp __P((char **));
121 static void usage __P((void));
124 static int setpassfilter __P((char **));
125 static int setactivefilter __P((char **));
129 static option_t *find_option __P((char *name));
130 static int process_option __P((option_t *, char **));
131 static int n_arguments __P((option_t *));
132 static int number_option __P((char *, u_int32_t *, int));
137 option_t general_options[] = {
138 { "debug", o_int, &debug,
139 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
140 { "-d", o_int, &debug,
141 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
142 { "kdebug", o_int, &kdebugflag,
143 "Set kernel driver debug level" },
144 { "nodetach", o_bool, &nodetach,
145 "Don't detach from controlling tty", 1 },
146 { "-detach", o_bool, &nodetach,
147 "Don't detach from controlling tty", 1 },
148 { "updetach", o_bool, &updetach,
149 "Detach from controlling tty once link is up", 1 },
150 { "holdoff", o_int, &holdoff,
151 "Set time in seconds before retrying connection" },
152 { "idle", o_int, &idle_time_limit,
153 "Set time in seconds before disconnecting idle link" },
154 { "lock", o_bool, &lockflag,
155 "Lock serial device with UUCP-style lock file", 1 },
156 { "-all", o_special_noarg, noopt,
157 "Don't request/allow any LCP or IPCP options (useless)" },
158 { "connect", o_string, &connector,
159 "A program to set up a connection",
160 OPT_A2INFO | OPT_PRIVFIX, &connector_info },
161 { "disconnect", o_string, &disconnector,
162 "Program to disconnect serial device",
163 OPT_A2INFO | OPT_PRIVFIX, &disconnector_info },
164 { "welcome", o_string, &welcomer,
165 "Script to welcome client",
166 OPT_A2INFO | OPT_PRIVFIX, &welcomer_info },
167 { "pty", o_string, &ptycommand,
168 "Script to run on pseudo-tty master side",
169 OPT_A2INFO | OPT_PRIVFIX, &ptycommand_info },
170 { "notty", o_bool, ¬ty,
171 "Input/output is not a tty", 1 },
172 { "record", o_string, &record_file,
173 "Record characters sent/received to file" },
174 { "maxconnect", o_int, &maxconnect,
175 "Set connection time limit", OPT_LLIMIT|OPT_NOINCR|OPT_ZEROINF },
176 { "crtscts", o_int, &crtscts,
177 "Set hardware (RTS/CTS) flow control", OPT_NOARG|OPT_VAL(1) },
178 { "nocrtscts", o_int, &crtscts,
179 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
180 { "-crtscts", o_int, &crtscts,
181 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
182 { "cdtrcts", o_int, &crtscts,
183 "Set alternate hardware (DTR/CTS) flow control", OPT_NOARG|OPT_VAL(2) },
184 { "nocdtrcts", o_int, &crtscts,
185 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
186 { "xonxoff", o_special_noarg, setxonxoff,
187 "Set software (XON/XOFF) flow control" },
188 { "domain", o_special, setdomain,
189 "Add given domain name to hostname" },
190 { "mtu", o_int, &lcp_allowoptions[0].mru,
191 "Set our MTU", OPT_LIMITS, NULL, MAXMRU, MINMRU },
192 { "netmask", o_special, setnetmask,
194 { "modem", o_bool, &modem,
195 "Use modem control lines", 1 },
196 { "local", o_bool, &modem,
197 "Don't use modem control lines" },
198 { "file", o_special, readfile,
199 "Take options from a file" },
200 { "call", o_special, callfile,
201 "Take options from a privileged file" },
202 { "persist", o_bool, &persist,
203 "Keep on reopening connection after close", 1 },
204 { "nopersist", o_bool, &persist,
205 "Turn off persist option" },
206 { "demand", o_bool, &demand,
207 "Dial on demand", 1, &persist },
208 { "--version", o_special_noarg, showversion,
209 "Show version number" },
210 { "--help", o_special_noarg, showhelp,
211 "Show brief listing of options" },
212 { "-h", o_special_noarg, showhelp,
213 "Show brief listing of options" },
216 { "pdebug", o_int, &dflag,
217 "libpcap debugging" },
218 { "pass-filter", 1, setpassfilter,
219 "set filter for packets to pass" },
220 { "active-filter", 1, setactivefilter,
221 "set filter for active pkts" },
227 #ifndef IMPLEMENTATION
228 #define IMPLEMENTATION ""
231 static char *usage_string = "\
232 pppd version %s.%d%s\n\
233 Usage: %s [ options ], where options are:\n\
234 <device> Communicate over the named device\n\
235 <speed> Set the baud rate to <speed>\n\
236 <loc>:<rem> Set the local and/or remote interface IP\n\
237 addresses. Either one may be omitted.\n\
238 asyncmap <n> Set the desired async map to hex <n>\n\
239 auth Require authentication from peer\n\
240 connect <p> Invoke shell command <p> to set up the serial line\n\
241 crtscts Use hardware RTS/CTS flow control\n\
242 defaultroute Add default route through interface\n\
243 file <f> Take options from file <f>\n\
244 modem Use modem control lines\n\
245 mru <n> Set MRU value to <n> for negotiation\n\
246 See pppd(8) for more options.\n\
250 * parse_args - parse a string of arguments from the command line.
253 parse_args(argc, argv)
261 privileged_option = privileged;
262 option_source = "command line";
268 * First see if it's an option in the new option list.
270 opt = find_option(arg);
272 int n = n_arguments(opt);
274 option_error("too few parameters for option %s", arg);
277 current_option = arg;
278 if (!process_option(opt, argv))
286 * Maybe a tty name, speed or IP address?
288 if ((ret = setdevname(arg, 0)) == 0
289 && (ret = setspeed(arg)) == 0
290 && (ret = setipaddr(arg)) == 0) {
291 option_error("unrecognized option '%s'", arg);
295 if (ret < 0) /* error */
302 * scan_args - scan the command line arguments to get the tty name,
303 * if specified. Also checks whether the notty or pty option was given.
306 scan_args(argc, argv)
313 privileged_option = privileged;
318 if (strcmp(arg, "notty") == 0 || strcmp(arg, "pty") == 0)
321 /* Skip options and their arguments */
322 opt = find_option(arg);
324 int n = n_arguments(opt);
330 /* Check if it's a tty name and copy it if so */
331 (void) setdevname(arg, 1);
336 * options_from_file - Read a string of options from a file,
337 * and interpret them.
340 options_from_file(filename, must_exist, check_prot, priv)
352 char args[MAXARGS][MAXWORDLEN];
353 char cmd[MAXWORDLEN];
357 f = fopen(filename, "r");
361 if (!must_exist && errno == ENOENT)
363 option_error("Can't open options file %s: %m", filename);
367 oldpriv = privileged_option;
368 privileged_option = priv;
369 oldsource = option_source;
370 option_source = strdup(filename);
371 if (option_source == NULL)
372 option_source = "file";
374 while (getword(f, cmd, &newline, filename)) {
376 * First see if it's a command.
378 opt = find_option(cmd);
380 int n = n_arguments(opt);
381 for (i = 0; i < n; ++i) {
382 if (!getword(f, args[i], &newline, filename)) {
384 "In file %s: too few parameters for option '%s'",
390 current_option = cmd;
391 if (!process_option(opt, argv))
397 * Maybe a tty name, speed or IP address?
399 if ((i = setdevname(cmd, 0)) == 0
400 && (i = setspeed(cmd)) == 0
401 && (i = setipaddr(cmd)) == 0) {
402 option_error("In file %s: unrecognized option '%s'",
406 if (i < 0) /* error */
413 privileged_option = oldpriv;
414 option_source = oldsource;
419 * options_from_user - See if the use has a ~/.ppprc file,
420 * and if so, interpret options from it.
425 char *user, *path, *file;
430 pw = getpwuid(getuid());
431 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
433 file = _PATH_USEROPT;
434 pl = strlen(user) + strlen(file) + 2;
437 novm("init file name");
438 slprintf(path, pl, "%s/%s", user, file);
439 ret = options_from_file(path, 0, 1, privileged);
445 * options_for_tty - See if an options file exists for the serial
446 * device, and if so, interpret options from it.
451 char *dev, *path, *p;
456 if (strncmp(dev, "/dev/", 5) == 0)
458 if (dev[0] == 0 || strcmp(dev, "tty") == 0)
459 return 1; /* don't look for /etc/ppp/options.tty */
460 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
463 novm("tty init file name");
464 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
465 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
466 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
469 ret = options_from_file(path, 0, 0, 1);
475 * find_option - scan the option lists for the various protocols
476 * looking for an entry with the given name.
477 * This could be optimized by using a hash table.
486 for (opt = general_options; opt->name != NULL; ++opt)
487 if (strcmp(name, opt->name) == 0)
489 for (opt = auth_options; opt->name != NULL; ++opt)
490 if (strcmp(name, opt->name) == 0)
492 for (i = 0; protocols[i] != NULL; ++i)
493 if ((opt = protocols[i]->options) != NULL)
494 for (; opt->name != NULL; ++opt)
495 if (strcmp(name, opt->name) == 0)
501 * process_option - process one new-style option.
504 process_option(opt, argv)
511 int (*parser) __P((char **));
513 if ((opt->flags & OPT_PRIV) && !privileged_option) {
514 option_error("using the %s option requires root privilege", opt->name);
517 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
518 option_error("%s option is disabled", opt->name);
521 if ((opt->flags & OPT_PRIVFIX) && !privileged_option) {
522 struct option_info *ip = (struct option_info *) opt->addr2;
523 if (ip && ip->priv) {
524 option_error("%s option cannot be overridden", opt->name);
531 v = opt->flags & OPT_VALUE;
532 *(bool *)(opt->addr) = v;
533 if (opt->addr2 && (opt->flags & OPT_A2COPY))
534 *(bool *)(opt->addr2) = v;
539 if ((opt->flags & OPT_NOARG) == 0) {
540 if (!int_option(*argv, &iv))
542 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
543 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
544 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
545 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
546 switch (opt->flags & OPT_LIMITS) {
548 option_error("%s value must be%s >= %d",
549 opt->name, zok, opt->lower_limit);
552 option_error("%s value must be%s <= %d",
553 opt->name, zok, opt->upper_limit);
556 option_error("%s value must be%s between %d and %d",
557 opt->name, opt->lower_limit, opt->upper_limit);
563 a = opt->flags & OPT_VALUE;
565 a -= 256; /* sign extend */
567 if (opt->flags & OPT_INC)
568 iv += *(int *)(opt->addr);
569 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
570 int oldv = *(int *)(opt->addr);
571 if ((opt->flags & OPT_ZEROINF) ?
572 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
573 option_error("%s value cannot be increased", opt->name);
577 *(int *)(opt->addr) = iv;
578 if (opt->addr2 && (opt->flags & OPT_A2COPY))
579 *(int *)(opt->addr2) = iv;
583 if (opt->flags & OPT_NOARG) {
584 v = opt->flags & OPT_VALUE;
585 } else if (!number_option(*argv, &v, 16))
587 if (opt->flags & OPT_OR)
588 v |= *(u_int32_t *)(opt->addr);
589 *(u_int32_t *)(opt->addr) = v;
590 if (opt->addr2 && (opt->flags & OPT_A2COPY))
591 *(u_int32_t *)(opt->addr2) = v;
595 if (opt->flags & OPT_STATIC) {
596 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
600 novm("option argument");
601 *(char **)(opt->addr) = sv;
605 case o_special_noarg:
607 parser = (int (*) __P((char **))) opt->addr;
608 if (!(*parser)(argv))
614 if (opt->flags & OPT_A2INFO) {
615 struct option_info *ip = (struct option_info *) opt->addr2;
616 ip->priv = privileged_option;
617 ip->source = option_source;
618 } else if ((opt->flags & (OPT_A2COPY|OPT_ENABLE)) == 0)
619 *(bool *)(opt->addr2) = 1;
626 * n_arguments - tell how many arguments an option takes
632 return (opt->type == o_bool || opt->type == o_special_noarg
633 || (opt->flags & OPT_NOARG))? 0: 1;
637 * usage - print out a message telling how to use the program.
642 if (phase == PHASE_INITIALIZE)
643 fprintf(stderr, usage_string, VERSION, PATCHLEVEL, IMPLEMENTATION,
648 * showhelp - print out usage message and exit.
654 if (phase == PHASE_INITIALIZE) {
662 * showversion - print out the version number and exit.
668 if (phase == PHASE_INITIALIZE) {
669 fprintf(stderr, "pppd version %s.%d%s\n",
670 VERSION, PATCHLEVEL, IMPLEMENTATION);
677 * option_error - print a message about an error in an option.
678 * The message is logged, and also sent to
679 * stderr if phase == PHASE_INITIALIZE.
682 option_error __V((char *fmt, ...))
692 fmt = va_arg(args, char *);
694 vslprintf(buf, sizeof(buf), fmt, args);
696 if (phase == PHASE_INITIALIZE)
697 fprintf(stderr, "%s: %s\n", progname, buf);
698 syslog(LOG_ERR, "%s", buf);
703 * readable - check if a file is readable by the real user.
716 if (fstat(fd, &sbuf) != 0)
718 if (sbuf.st_uid == uid)
719 return sbuf.st_mode & S_IRUSR;
720 if (sbuf.st_gid == getgid())
721 return sbuf.st_mode & S_IRGRP;
722 for (i = 0; i < ngroups; ++i)
723 if (sbuf.st_gid == groups[i])
724 return sbuf.st_mode & S_IRGRP;
725 return sbuf.st_mode & S_IROTH;
730 * Read a word from a file.
731 * Words are delimited by white-space or by quotes (" or ').
732 * Quotes, white-space and \ may be escaped with \.
733 * \<newline> is ignored.
736 getword(f, word, newlinep, filename)
744 int value, digit, got, n;
746 #define isoctal(c) ((c) >= '0' && (c) < '8')
754 * First skip white-space and comments.
762 * A newline means the end of a comment; backslash-newline
763 * is ignored. Note that we cannot have escape && comment.
775 * Ignore characters other than newline in a comment.
781 * If this character is escaped, we have a word start.
787 * If this is the escape character, look at the next character.
795 * If this is the start of a comment, ignore the rest of the line.
803 * A non-whitespace character is the start of a word.
810 * Save the delimiter for quoted strings.
812 if (!escape && (c == '"' || c == '\'')) {
819 * Process characters until the end of the word.
824 * This character is escaped: backslash-newline is ignored,
825 * various other characters indicate particular values
826 * as for C backslash-escapes.
861 * \ddd octal sequence
864 for (n = 0; n < 3 && isoctal(c); ++n) {
865 value = (value << 3) + (c & 07);
874 * \x<hex_string> sequence
878 for (n = 0; n < 2 && isxdigit(c); ++n) {
879 digit = toupper(c) - '0';
881 digit += '0' + 10 - 'A';
882 value = (value << 4) + digit;
890 * Otherwise the character stands for itself.
897 * Store the resulting character for the escape sequence.
899 if (len < MAXWORDLEN-1)
910 * Not escaped: see if we've reached the end of the word.
916 if (isspace(c) || c == '#') {
923 * Backslash starts an escape sequence.
932 * An ordinary character: store it in the word and get another.
934 if (len < MAXWORDLEN-1)
942 * End of the word: check for errors.
948 option_error("Error reading %s: %m", filename);
952 * If len is zero, then we didn't find a word before the
960 * Warn if the word was too long, and append a terminating null.
962 if (len >= MAXWORDLEN) {
963 option_error("warning: word in file %s too long (%.20s...)",
965 len = MAXWORDLEN - 1;
976 * number_option - parse an unsigned numeric parameter for an option.
979 number_option(str, valp, base)
986 *valp = strtoul(str, &ptr, base);
988 option_error("invalid numeric parameter '%s' for %s option",
989 str, current_option);
997 * int_option - like number_option, but valp is int *,
998 * the base is assumed to be 0, and *valp is not changed
999 * if there is an error.
1002 int_option(str, valp)
1008 if (!number_option(str, &v, 0))
1016 * The following procedures parse options.
1020 * readfile - take commands from a file.
1026 return options_from_file(*argv, 1, 1, privileged_option);
1030 * callfile - take commands from /etc/ppp/peers/<name>.
1031 * Name may not contain /../, start with / or ../, or end in /..
1037 char *fname, *arg, *p;
1042 if (arg[0] == '/' || arg[0] == 0)
1045 for (p = arg; *p != 0; ) {
1046 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1050 while (*p != '/' && *p != 0)
1057 option_error("call option value may not contain .. or start with /");
1061 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1062 if ((fname = (char *) malloc(l)) == NULL)
1063 novm("call file name");
1064 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1066 ok = options_from_file(fname, 1, 1, 1);
1074 * setpdebug - Set libpcap debugging level.
1080 return int_option(*argv, &dflag);
1084 * setpassfilter - Set the pass filter for packets
1090 pc.linktype = DLT_PPP;
1091 pc.snapshot = PPP_HDRLEN;
1093 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1095 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1100 * setactivefilter - Set the active filter for packets
1103 setactivefilter(argv)
1106 pc.linktype = DLT_PPP;
1107 pc.snapshot = PPP_HDRLEN;
1109 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1111 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1117 * noopt - Disable all options.
1123 BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));
1124 BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));
1125 BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options));
1126 BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options));
1132 * setdomain - Set domain name to append to hostname
1138 if (!privileged_option) {
1139 option_error("using the domain option requires root privilege");
1142 gethostname(hostname, MAXNAMELEN);
1145 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1146 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1148 hostname[MAXNAMELEN-1] = 0;
1154 * setspeed - Set the speed.
1163 spd = strtol(arg, &ptr, 0);
1164 if (ptr == arg || *ptr != 0 || spd == 0)
1172 * setdevname - Set the device name.
1175 setdevname(cp, quiet)
1179 struct stat statbuf;
1180 char dev[MAXPATHLEN];
1185 if (strncmp("/dev/", cp, 5) != 0) {
1186 strlcpy(dev, "/dev/", sizeof(dev));
1187 strlcat(dev, cp, sizeof(dev));
1192 * Check if there is a device by this name.
1194 if (stat(cp, &statbuf) < 0) {
1195 if (errno == ENOENT || quiet)
1197 option_error("Couldn't stat %s: %m", cp);
1201 if (devnam_info.priv && !privileged_option) {
1203 option_error("device name cannot be overridden");
1207 strlcpy(devnam, cp, sizeof(devnam));
1209 devnam_info.priv = privileged_option;
1210 devnam_info.source = option_source;
1217 * setipaddr - Set the IP address
1225 u_int32_t local, remote;
1226 ipcp_options *wo = &ipcp_wantoptions[0];
1229 * IP address pair separated by ":".
1231 if ((colon = strchr(arg, ':')) == NULL)
1235 * If colon first character, then no local addr.
1239 if ((local = inet_addr(arg)) == -1) {
1240 if ((hp = gethostbyname(arg)) == NULL) {
1241 option_error("unknown host: %s", arg);
1244 local = *(u_int32_t *)hp->h_addr;
1247 if (bad_ip_adrs(local)) {
1248 option_error("bad local IP address %s", ip_ntoa(local));
1252 wo->ouraddr = local;
1257 * If colon last character, then no remote addr.
1259 if (*++colon != '\0') {
1260 if ((remote = inet_addr(colon)) == -1) {
1261 if ((hp = gethostbyname(colon)) == NULL) {
1262 option_error("unknown host: %s", colon);
1265 remote = *(u_int32_t *)hp->h_addr;
1266 if (remote_name[0] == 0)
1267 strlcpy(remote_name, colon, sizeof(remote_name));
1270 if (bad_ip_adrs(remote)) {
1271 option_error("bad remote IP address %s", ip_ntoa(remote));
1275 wo->hisaddr = remote;
1283 * setnetmask - set the netmask to be used on the interface.
1294 * Unfortunately, if we use inet_addr, we can't tell whether
1295 * a result of all 1s is an error or a valid 255.255.255.255.
1301 b = strtoul(p, &endp, 0);
1304 if (b < 0 || b > 255) {
1306 /* accept e.g. 0xffffff00 */
1312 mask |= b << (n * 8);
1314 if (*p != '.' || n == 0)
1321 if (*p != 0 || (netmask & ~mask) != 0) {
1322 option_error("invalid netmask value '%s'", *argv);
1334 lcp_wantoptions[0].asyncmap |= 0x000A0000; /* escape ^S and ^Q */
1335 lcp_wantoptions[0].neg_asyncmap = 1;