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 1.53 1999/03/19 04:23:44 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] = "/dev/tty"; /* 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 int maxconnect = 0; /* Maximum connect time */
80 char user[MAXNAMELEN]; /* Username for PAP */
81 char passwd[MAXSECRETLEN]; /* Password for PAP */
82 bool persist = 0; /* Reopen link after it goes down */
83 char our_name[MAXNAMELEN]; /* Our name for authentication purposes */
84 bool demand = 0; /* do dial-on-demand */
85 char *ipparam = NULL; /* Extra parameter for ip up/down scripts */
86 int idle_time_limit = 0; /* Disconnect if idle for this many seconds */
87 int holdoff = 30; /* # seconds to pause before reconnecting */
89 extern option_t auth_options[];
91 struct option_info connector_info;
92 struct option_info disconnector_info;
93 struct option_info welcomer_info;
94 struct option_info devnam_info;
97 struct bpf_program pass_filter;/* Filter program for packets to pass */
98 struct bpf_program active_filter; /* Filter program for link-active pkts */
99 pcap_t pc; /* Fake struct pcap so we can compile expr */
105 static int setdevname __P((char *, int));
106 static int setipaddr __P((char *));
107 static int setspeed __P((char *));
108 static int noopt __P((char **));
109 static int setdomain __P((char **));
110 static int setnetmask __P((char **));
111 static int setxonxoff __P((char **));
112 static int readfile __P((char **));
113 static int callfile __P((char **));
114 static int showversion __P((char **));
115 static int showhelp __P((char **));
116 static void usage __P((void));
119 static int setpassfilter __P((char **));
120 static int setactivefilter __P((char **));
124 static option_t *find_option __P((char *name));
125 static int process_option __P((option_t *, char **));
126 static int n_arguments __P((option_t *));
127 static int number_option __P((char *, u_int32_t *, int));
132 option_t general_options[] = {
133 { "debug", o_int, &debug,
134 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
135 { "-d", o_int, &debug,
136 "Increase debugging level", OPT_INC|OPT_NOARG|1 },
137 { "kdebug", o_int, &kdebugflag,
138 "Set kernel driver debug level" },
139 { "nodetach", o_bool, &nodetach,
140 "Don't detach from controlling tty", 1 },
141 { "-detach", o_bool, &nodetach,
142 "Don't detach from controlling tty", 1 },
143 { "updetach", o_bool, &updetach,
144 "Detach from controlling tty once link is up", 1 },
145 { "holdoff", o_int, &holdoff,
146 "Set time in seconds before retrying connection" },
147 { "idle", o_int, &idle_time_limit,
148 "Set time in seconds before disconnecting idle link" },
149 { "lock", o_bool, &lockflag,
150 "Lock serial device with UUCP-style lock file", 1 },
151 { "-all", o_special_noarg, noopt,
152 "Don't request/allow any LCP or IPCP options (useless)" },
153 { "connect", o_string, &connector,
154 "A program to set up a connection",
155 OPT_A2INFO | OPT_PRIVFIX, &connector_info },
156 { "disconnect", o_string, &disconnector,
157 "Program to disconnect serial device",
158 OPT_A2INFO | OPT_PRIVFIX, &disconnector_info },
159 { "welcome", o_string, &welcomer,
160 "Script to welcome client",
161 OPT_A2INFO | OPT_PRIVFIX, &welcomer_info },
162 { "maxconnect", o_int, &maxconnect,
163 "Set connection time limit", OPT_LLIMIT|OPT_NOINCR|OPT_ZEROINF },
164 { "crtscts", o_int, &crtscts,
165 "Set hardware (RTS/CTS) flow control", OPT_NOARG|OPT_VAL(1) },
166 { "nocrtscts", o_int, &crtscts,
167 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
168 { "-crtscts", o_int, &crtscts,
169 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
170 { "cdtrcts", o_int, &crtscts,
171 "Set alternate hardware (DTR/CTS) flow control", OPT_NOARG|OPT_VAL(2) },
172 { "nocdtrcts", o_int, &crtscts,
173 "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) },
174 { "xonxoff", o_special_noarg, setxonxoff,
175 "Set software (XON/XOFF) flow control" },
176 { "domain", o_special, setdomain,
177 "Add given domain name to hostname" },
178 { "mtu", o_int, &lcp_allowoptions[0].mru,
179 "Set our MTU", OPT_LIMITS, NULL, MAXMRU, MINMRU },
180 { "netmask", o_special, setnetmask,
182 { "modem", o_bool, &modem,
183 "Use modem control lines", 1 },
184 { "local", o_bool, &modem,
185 "Don't use modem control lines" },
186 { "file", o_special, readfile,
187 "Take options from a file" },
188 { "call", o_special, callfile,
189 "Take options from a privileged file" },
190 { "persist", o_bool, &persist,
191 "Keep on reopening connection after close", 1 },
192 { "nopersist", o_bool, &persist,
193 "Turn off persist option" },
194 { "demand", o_bool, &demand,
195 "Dial on demand", 1, &persist },
196 { "--version", o_special_noarg, showversion,
197 "Show version number" },
198 { "--help", o_special_noarg, showhelp,
199 "Show brief listing of options" },
200 { "-h", o_special_noarg, showhelp,
201 "Show brief listing of options" },
204 { "pdebug", o_int, &dflag,
205 "libpcap debugging" },
206 { "pass-filter", 1, setpassfilter,
207 "set filter for packets to pass" },
208 { "active-filter", 1, setactivefilter,
209 "set filter for active pkts" },
215 #ifndef IMPLEMENTATION
216 #define IMPLEMENTATION ""
219 static char *usage_string = "\
220 pppd version %s.%d%s\n\
221 Usage: %s [ options ], where options are:\n\
222 <device> Communicate over the named device\n\
223 <speed> Set the baud rate to <speed>\n\
224 <loc>:<rem> Set the local and/or remote interface IP\n\
225 addresses. Either one may be omitted.\n\
226 asyncmap <n> Set the desired async map to hex <n>\n\
227 auth Require authentication from peer\n\
228 connect <p> Invoke shell command <p> to set up the serial line\n\
229 crtscts Use hardware RTS/CTS flow control\n\
230 defaultroute Add default route through interface\n\
231 file <f> Take options from file <f>\n\
232 modem Use modem control lines\n\
233 mru <n> Set MRU value to <n> for negotiation\n\
234 See pppd(8) for more options.\n\
238 * parse_args - parse a string of arguments from the command line.
241 parse_args(argc, argv)
249 privileged_option = privileged;
250 option_source = "command line";
256 * First see if it's an option in the new option list.
258 opt = find_option(arg);
260 int n = n_arguments(opt);
262 option_error("too few parameters for option %s", arg);
265 current_option = arg;
266 if (!process_option(opt, argv))
274 * Maybe a tty name, speed or IP address?
276 if ((ret = setdevname(arg, 0)) == 0
277 && (ret = setspeed(arg)) == 0
278 && (ret = setipaddr(arg)) == 0) {
279 option_error("unrecognized option '%s'", arg);
283 if (ret < 0) /* error */
290 * scan_args - scan the command line arguments to get the tty name,
294 scan_args(argc, argv)
301 privileged_option = privileged;
306 /* Skip options and their arguments */
307 opt = find_option(arg);
309 int n = n_arguments(opt);
315 /* Check if it's a tty name and copy it if so */
316 (void) setdevname(arg, 1);
321 * options_from_file - Read a string of options from a file,
322 * and interpret them.
325 options_from_file(filename, must_exist, check_prot, priv)
337 char args[MAXARGS][MAXWORDLEN];
338 char cmd[MAXWORDLEN];
342 f = fopen(filename, "r");
346 if (!must_exist && errno == ENOENT)
348 option_error("Can't open options file %s: %m", filename);
352 oldpriv = privileged_option;
353 privileged_option = priv;
354 oldsource = option_source;
355 option_source = strdup(filename);
356 if (option_source == NULL)
357 option_source = "file";
359 while (getword(f, cmd, &newline, filename)) {
361 * First see if it's a command.
363 opt = find_option(cmd);
365 int n = n_arguments(opt);
366 for (i = 0; i < n; ++i) {
367 if (!getword(f, args[i], &newline, filename)) {
369 "In file %s: too few parameters for option '%s'",
375 current_option = cmd;
376 if (!process_option(opt, argv))
382 * Maybe a tty name, speed or IP address?
384 if ((i = setdevname(cmd, 0)) == 0
385 && (i = setspeed(cmd)) == 0
386 && (i = setipaddr(cmd)) == 0) {
387 option_error("In file %s: unrecognized option '%s'",
391 if (i < 0) /* error */
398 privileged_option = oldpriv;
399 option_source = oldsource;
404 * options_from_user - See if the use has a ~/.ppprc file,
405 * and if so, interpret options from it.
410 char *user, *path, *file;
415 pw = getpwuid(getuid());
416 if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0)
418 file = _PATH_USEROPT;
419 pl = strlen(user) + strlen(file) + 2;
422 novm("init file name");
423 slprintf(path, pl, "%s/%s", user, file);
424 ret = options_from_file(path, 0, 1, privileged);
430 * options_for_tty - See if an options file exists for the serial
431 * device, and if so, interpret options from it.
436 char *dev, *path, *p;
441 if (strncmp(dev, "/dev/", 5) == 0)
443 if (strcmp(dev, "tty") == 0)
444 return 1; /* don't look for /etc/ppp/options.tty */
445 pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1;
448 novm("tty init file name");
449 slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev);
450 /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */
451 for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p)
454 ret = options_from_file(path, 0, 0, 1);
460 * find_option - scan the option lists for the various protocols
461 * looking for an entry with the given name.
462 * This could be optimized by using a hash table.
471 for (opt = general_options; opt->name != NULL; ++opt)
472 if (strcmp(name, opt->name) == 0)
474 for (opt = auth_options; opt->name != NULL; ++opt)
475 if (strcmp(name, opt->name) == 0)
477 for (i = 0; protocols[i] != NULL; ++i)
478 if ((opt = protocols[i]->options) != NULL)
479 for (; opt->name != NULL; ++opt)
480 if (strcmp(name, opt->name) == 0)
486 * process_option - process one new-style option.
489 process_option(opt, argv)
496 int (*parser) __P((char **));
498 if ((opt->flags & OPT_PRIV) && !privileged_option) {
499 option_error("using the %s option requires root privilege", opt->name);
502 if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) {
503 option_error("%s option is disabled", opt->name);
506 if ((opt->flags & OPT_PRIVFIX) && !privileged_option) {
507 struct option_info *ip = (struct option_info *) opt->addr2;
508 if (ip && ip->priv) {
509 option_error("%s option cannot be overridden", opt->name);
516 v = opt->flags & OPT_VALUE;
517 *(bool *)(opt->addr) = v;
518 if (opt->addr2 && (opt->flags & OPT_A2COPY))
519 *(bool *)(opt->addr2) = v;
524 if ((opt->flags & OPT_NOARG) == 0) {
525 if (!int_option(*argv, &iv))
527 if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit)
528 || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit))
529 && !((opt->flags & OPT_ZEROOK && iv == 0))) {
530 char *zok = (opt->flags & OPT_ZEROOK)? " zero or": "";
531 switch (opt->flags & OPT_LIMITS) {
533 option_error("%s value must be%s >= %d",
534 opt->name, zok, opt->lower_limit);
537 option_error("%s value must be%s <= %d",
538 opt->name, zok, opt->upper_limit);
541 option_error("%s value must be%s between %d and %d",
542 opt->name, opt->lower_limit, opt->upper_limit);
548 a = opt->flags & OPT_VALUE;
550 a -= 256; /* sign extend */
552 if (opt->flags & OPT_INC)
553 iv += *(int *)(opt->addr);
554 if ((opt->flags & OPT_NOINCR) && !privileged_option) {
555 int oldv = *(int *)(opt->addr);
556 if ((opt->flags & OPT_ZEROINF) ?
557 (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) {
558 option_error("%s value cannot be increased", opt->name);
562 *(int *)(opt->addr) = iv;
563 if (opt->addr2 && (opt->flags & OPT_A2COPY))
564 *(int *)(opt->addr2) = iv;
568 if (opt->flags & OPT_NOARG) {
569 v = opt->flags & OPT_VALUE;
570 } else if (!number_option(*argv, &v, 16))
572 if (opt->flags & OPT_OR)
573 v |= *(u_int32_t *)(opt->addr);
574 *(u_int32_t *)(opt->addr) = v;
575 if (opt->addr2 && (opt->flags & OPT_A2COPY))
576 *(u_int32_t *)(opt->addr2) = v;
580 if (opt->flags & OPT_STATIC) {
581 strlcpy((char *)(opt->addr), *argv, opt->upper_limit);
585 novm("option argument");
586 *(char **)(opt->addr) = sv;
590 case o_special_noarg:
592 parser = (int (*) __P((char **))) opt->addr;
593 if (!(*parser)(argv))
599 if (opt->flags & OPT_A2INFO) {
600 struct option_info *ip = (struct option_info *) opt->addr2;
601 ip->priv = privileged_option;
602 ip->source = option_source;
603 } else if ((opt->flags & (OPT_A2COPY|OPT_ENABLE)) == 0)
604 *(bool *)(opt->addr2) = 1;
611 * n_arguments - tell how many arguments an option takes
617 return (opt->type == o_bool || opt->type == o_special_noarg
618 || (opt->flags & OPT_NOARG))? 0: 1;
622 * usage - print out a message telling how to use the program.
627 if (phase == PHASE_INITIALIZE)
628 fprintf(stderr, usage_string, VERSION, PATCHLEVEL, IMPLEMENTATION,
633 * showhelp - print out usage message and exit.
639 if (phase == PHASE_INITIALIZE) {
647 * showversion - print out the version number and exit.
653 if (phase == PHASE_INITIALIZE) {
654 fprintf(stderr, "pppd version %s.%d%s\n",
655 VERSION, PATCHLEVEL, IMPLEMENTATION);
662 * option_error - print a message about an error in an option.
663 * The message is logged, and also sent to
664 * stderr if phase == PHASE_INITIALIZE.
667 option_error __V((char *fmt, ...))
677 fmt = va_arg(args, char *);
679 vslprintf(buf, sizeof(buf), fmt, args);
681 if (phase == PHASE_INITIALIZE)
682 fprintf(stderr, "%s: %s\n", progname, buf);
683 syslog(LOG_ERR, "%s", buf);
688 * readable - check if a file is readable by the real user.
701 if (fstat(fd, &sbuf) != 0)
703 if (sbuf.st_uid == uid)
704 return sbuf.st_mode & S_IRUSR;
705 if (sbuf.st_gid == getgid())
706 return sbuf.st_mode & S_IRGRP;
707 for (i = 0; i < ngroups; ++i)
708 if (sbuf.st_gid == groups[i])
709 return sbuf.st_mode & S_IRGRP;
710 return sbuf.st_mode & S_IROTH;
715 * Read a word from a file.
716 * Words are delimited by white-space or by quotes (" or ').
717 * Quotes, white-space and \ may be escaped with \.
718 * \<newline> is ignored.
721 getword(f, word, newlinep, filename)
729 int value, digit, got, n;
731 #define isoctal(c) ((c) >= '0' && (c) < '8')
739 * First skip white-space and comments.
747 * A newline means the end of a comment; backslash-newline
748 * is ignored. Note that we cannot have escape && comment.
760 * Ignore characters other than newline in a comment.
766 * If this character is escaped, we have a word start.
772 * If this is the escape character, look at the next character.
780 * If this is the start of a comment, ignore the rest of the line.
788 * A non-whitespace character is the start of a word.
795 * Save the delimiter for quoted strings.
797 if (!escape && (c == '"' || c == '\'')) {
804 * Process characters until the end of the word.
809 * This character is escaped: backslash-newline is ignored,
810 * various other characters indicate particular values
811 * as for C backslash-escapes.
846 * \ddd octal sequence
849 for (n = 0; n < 3 && isoctal(c); ++n) {
850 value = (value << 3) + (c & 07);
859 * \x<hex_string> sequence
863 for (n = 0; n < 2 && isxdigit(c); ++n) {
864 digit = toupper(c) - '0';
866 digit += '0' + 10 - 'A';
867 value = (value << 4) + digit;
875 * Otherwise the character stands for itself.
882 * Store the resulting character for the escape sequence.
884 if (len < MAXWORDLEN-1)
895 * Not escaped: see if we've reached the end of the word.
901 if (isspace(c) || c == '#') {
908 * Backslash starts an escape sequence.
917 * An ordinary character: store it in the word and get another.
919 if (len < MAXWORDLEN-1)
927 * End of the word: check for errors.
933 option_error("Error reading %s: %m", filename);
937 * If len is zero, then we didn't find a word before the
945 * Warn if the word was too long, and append a terminating null.
947 if (len >= MAXWORDLEN) {
948 option_error("warning: word in file %s too long (%.20s...)",
950 len = MAXWORDLEN - 1;
961 * number_option - parse an unsigned numeric parameter for an option.
964 number_option(str, valp, base)
971 *valp = strtoul(str, &ptr, base);
973 option_error("invalid numeric parameter '%s' for %s option",
974 str, current_option);
982 * int_option - like number_option, but valp is int *,
983 * the base is assumed to be 0, and *valp is not changed
984 * if there is an error.
987 int_option(str, valp)
993 if (!number_option(str, &v, 0))
1001 * The following procedures parse options.
1005 * readfile - take commands from a file.
1011 return options_from_file(*argv, 1, 1, privileged_option);
1015 * callfile - take commands from /etc/ppp/peers/<name>.
1016 * Name may not contain /../, start with / or ../, or end in /..
1022 char *fname, *arg, *p;
1027 if (arg[0] == '/' || arg[0] == 0)
1030 for (p = arg; *p != 0; ) {
1031 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
1035 while (*p != '/' && *p != 0)
1042 option_error("call option value may not contain .. or start with /");
1046 l = strlen(arg) + strlen(_PATH_PEERFILES) + 1;
1047 if ((fname = (char *) malloc(l)) == NULL)
1048 novm("call file name");
1049 slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg);
1051 ok = options_from_file(fname, 1, 1, 1);
1059 * setpdebug - Set libpcap debugging level.
1065 return int_option(*argv, &dflag);
1069 * setpassfilter - Set the pass filter for packets
1075 pc.linktype = DLT_PPP;
1076 pc.snapshot = PPP_HDRLEN;
1078 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1080 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1085 * setactivefilter - Set the active filter for packets
1088 setactivefilter(argv)
1091 pc.linktype = DLT_PPP;
1092 pc.snapshot = PPP_HDRLEN;
1094 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1096 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1102 * noopt - Disable all options.
1108 BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));
1109 BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));
1110 BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options));
1111 BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options));
1117 * setdomain - Set domain name to append to hostname
1123 if (!privileged_option) {
1124 option_error("using the domain option requires root privilege");
1127 gethostname(hostname, MAXNAMELEN);
1130 strncat(hostname, ".", MAXNAMELEN - strlen(hostname));
1131 strncat(hostname, *argv, MAXNAMELEN - strlen(hostname));
1133 hostname[MAXNAMELEN-1] = 0;
1139 * setspeed - Set the speed.
1148 spd = strtol(arg, &ptr, 0);
1149 if (ptr == arg || *ptr != 0 || spd == 0)
1157 * setdevname - Set the device name.
1160 setdevname(cp, quiet)
1164 struct stat statbuf;
1165 char dev[MAXPATHLEN];
1170 if (strncmp("/dev/", cp, 5) != 0) {
1171 strlcpy(dev, "/dev/", sizeof(dev));
1172 strlcat(dev, cp, sizeof(dev));
1177 * Check if there is a device by this name.
1179 if (stat(cp, &statbuf) < 0) {
1180 if (errno == ENOENT || quiet)
1182 option_error("Couldn't stat %s: %m", cp);
1186 if (devnam_info.priv && !privileged_option) {
1188 option_error("device name cannot be overridden");
1192 strlcpy(devnam, cp, sizeof(devnam));
1194 devnam_info.priv = privileged_option;
1195 devnam_info.source = option_source;
1202 * setipaddr - Set the IP address
1210 u_int32_t local, remote;
1211 ipcp_options *wo = &ipcp_wantoptions[0];
1214 * IP address pair separated by ":".
1216 if ((colon = strchr(arg, ':')) == NULL)
1220 * If colon first character, then no local addr.
1224 if ((local = inet_addr(arg)) == -1) {
1225 if ((hp = gethostbyname(arg)) == NULL) {
1226 option_error("unknown host: %s", arg);
1229 local = *(u_int32_t *)hp->h_addr;
1232 if (bad_ip_adrs(local)) {
1233 option_error("bad local IP address %s", ip_ntoa(local));
1237 wo->ouraddr = local;
1242 * If colon last character, then no remote addr.
1244 if (*++colon != '\0') {
1245 if ((remote = inet_addr(colon)) == -1) {
1246 if ((hp = gethostbyname(colon)) == NULL) {
1247 option_error("unknown host: %s", colon);
1250 remote = *(u_int32_t *)hp->h_addr;
1251 if (remote_name[0] == 0)
1252 strlcpy(remote_name, colon, sizeof(remote_name));
1255 if (bad_ip_adrs(remote)) {
1256 option_error("bad remote IP address %s", ip_ntoa(remote));
1260 wo->hisaddr = remote;
1268 * setnetmask - set the netmask to be used on the interface.
1279 * Unfortunately, if we use inet_addr, we can't tell whether
1280 * a result of all 1s is an error or a valid 255.255.255.255.
1286 b = strtoul(p, &endp, 0);
1289 if (b < 0 || b > 255) {
1291 /* accept e.g. 0xffffff00 */
1297 mask |= b << (n * 8);
1299 if (*p != '.' || n == 0)
1306 if (*p != 0 || (netmask & ~mask) != 0) {
1307 option_error("invalid netmask value '%s'", *argv);
1319 lcp_wantoptions[0].asyncmap |= 0x000A0000; /* escape ^S and ^Q */
1320 lcp_wantoptions[0].neg_asyncmap = 1;