Bug Summary

File:src/usr.sbin/pppd/options.c
Warning:line 1059, column 5
Null pointer passed as 1st argument to string copy function

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name options.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.sbin/pppd/obj -resource-dir /usr/local/lib/clang/13.0.0 -I . -I /usr/src/usr.sbin/pppd/../../lib/libpcap -D HAVE_PATHS_H -D PPP_FILTER -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.sbin/pppd/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/usr.sbin/pppd/options.c
1/* $OpenBSD: options.c,v 1.29 2015/12/06 12:00:16 tobias Exp $ */
2
3/*
4 * options.c - handles option processing for PPP.
5 *
6 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. The name "Carnegie Mellon University" must not be used to
21 * endorse or promote products derived from this software without
22 * prior written permission. For permission or any legal
23 * details, please contact
24 * Office of Technology Transfer
25 * Carnegie Mellon University
26 * 5000 Forbes Avenue
27 * Pittsburgh, PA 15213-3890
28 * (412) 268-4387, fax: (412) 268-7395
29 * tech-transfer@andrew.cmu.edu
30 *
31 * 4. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by Computing Services
34 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
35 *
36 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
37 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
38 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
39 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
40 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
41 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
42 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
43 */
44
45#include <ctype.h>
46#include <stdio.h>
47#include <errno(*__errno()).h>
48#include <unistd.h>
49#include <limits.h>
50#include <stdlib.h>
51#include <termios.h>
52#include <syslog.h>
53#include <string.h>
54#include <netdb.h>
55#include <pwd.h>
56#include <sys/types.h>
57#include <sys/stat.h>
58#include <netinet/in.h>
59#include <arpa/inet.h>
60#ifdef PPP_FILTER1
61#include <pcap.h>
62#include <pcap-int.h> /* XXX: To get struct pcap */
63#endif
64
65#include "pppd.h"
66#include "pathnames.h"
67#include "patchlevel.h"
68#include "fsm.h"
69#include "lcp.h"
70#include "ipcp.h"
71#include "upap.h"
72#include "chap.h"
73#include "ccp.h"
74#ifdef CBCP_SUPPORT
75#include "cbcp.h"
76#endif
77
78#include <net/ppp-comp.h>
79
80#define FALSE0 0
81#define TRUE1 1
82
83#if defined(ultrix) || defined(NeXT)
84char *strdup(char *);
85#endif
86
87#ifndef GIDSET_TYPEgid_t
88#define GIDSET_TYPEgid_t gid_t
89#endif
90
91/*
92 * Option variables and default values.
93 */
94#ifdef PPP_FILTER1
95int dflag = 0; /* Tell libpcap we want debugging */
96#endif
97int debug = 0; /* Debug flag */
98int kdebugflag = 0; /* Tell kernel to print debug messages */
99int default_device = 1; /* Using /dev/tty or equivalent */
100char devnam[PATH_MAX1024] = "/dev/tty"; /* Device name */
101int crtscts = 0; /* Use hardware flow control */
102int modem = 1; /* Use modem control lines */
103int modem_chat = 0; /* Use modem control lines during chat */
104int inspeed = 0; /* Input/Output speed requested */
105u_int32_t netmask = 0; /* IP netmask to set on interface */
106int lockflag = 0; /* Create lock file to lock the serial dev */
107int nodetach = 0; /* Don't detach from controlling tty */
108char *connector = NULL((void *)0); /* Script to establish physical link */
109char *disconnector = NULL((void *)0); /* Script to disestablish physical link */
110char *welcomer = NULL((void *)0); /* Script to run after phys link estab. */
111int maxconnect = 0; /* Maximum connect time */
112char user[MAXNAMELEN256]; /* Username for PAP */
113char passwd[MAXSECRETLEN256]; /* Password for PAP */
114int auth_required = 0; /* Peer is required to authenticate */
115int persist = 0; /* Reopen link after it goes down */
116int uselogin = 0; /* Use /etc/passwd for checking PAP */
117int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
118int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
119char our_name[MAXNAMELEN256]; /* Our name for authentication purposes */
120char remote_name[MAXNAMELEN256]; /* Peer's name for authentication */
121int explicit_remote = 0; /* User specified explicit remote name */
122int usehostname = 0; /* Use hostname for our_name */
123int disable_defaultip = 0; /* Don't use hostname for default IP adrs */
124int demand = 0; /* do dial-on-demand */
125char *ipparam = NULL((void *)0); /* Extra parameter for ip up/down scripts */
126int cryptpap; /* Passwords in pap-secrets are encrypted */
127int idle_time_limit = 0; /* Disconnect if idle for this many seconds */
128int holdoff = 30; /* # seconds to pause before reconnecting */
129int refuse_pap = 0; /* Set to say we won't do PAP */
130int refuse_chap = 0; /* Set to say we won't do CHAP */
131
132#ifdef MSLANMAN
133int ms_lanman = 0; /* Nonzero if use LanMan password instead of NT */
134 /* Has meaning only with MS-CHAP challenges */
135#endif
136
137struct option_info auth_req_info;
138struct option_info connector_info;
139struct option_info disconnector_info;
140struct option_info welcomer_info;
141struct option_info devnam_info;
142#ifdef PPP_FILTER1
143struct bpf_program pass_filter;/* Filter program for packets to pass */
144struct bpf_program active_filter; /* Filter program for link-active pkts */
145pcap_t pc; /* Fake struct pcap so we can compile expr */
146#endif
147
148/*
149 * Prototypes
150 */
151static int setdevname(char *, int);
152static int setipaddr(char *);
153static int setspeed(char *);
154static int setdebug(char **);
155static int setkdebug(char **);
156static int setpassive(char **);
157static int setsilent(char **);
158static int noopt(char **);
159static int setnovj(char **);
160static int setnovjccomp(char **);
161static int setvjslots(char **);
162static int reqpap(char **);
163static int nopap(char **);
164static int nochap(char **);
165static int reqchap(char **);
166static int noaccomp(char **);
167static int noasyncmap(char **);
168static int noip(char **);
169static int nomagicnumber(char **);
170static int setasyncmap(char **);
171static int setescape(char **);
172static int setmru(char **);
173static int setmtu(char **);
174#ifdef CBCP_SUPPORT
175static int setcbcp(char **);
176#endif
177static int nomru(char **);
178static int nopcomp(char **);
179static int setconnector(char **);
180static int setdisconnector(char **);
181static int setwelcomer(char **);
182static int setmaxconnect(char **);
183static int setdomain(char **);
184static int setnetmask(char **);
185static int setcrtscts(char **);
186static int setnocrtscts(char **);
187static int setxonxoff(char **);
188static int setnodetach(char **);
189static int setupdetach(char **);
190static int setmodem(char **);
191static int setmodem_chat(char **);
192static int setlocal(char **);
193static int setlock(char **);
194static int setname(char **);
195static int setuser(char **);
196static int setremote(char **);
197static int setauth(char **);
198static int setnoauth(char **);
199static int readfile(char **);
200static int callfile(char **);
201static int setdefaultroute(char **);
202static int setnodefaultroute(char **);
203static int setproxyarp(char **);
204static int setnoproxyarp(char **);
205static int setpersist(char **);
206static int setnopersist(char **);
207static int setdologin(char **);
208static int setusehostname(char **);
209static int setnoipdflt(char **);
210static int setlcptimeout(char **);
211static int setlcpterm(char **);
212static int setlcpconf(char **);
213static int setlcpfails(char **);
214static int setipcptimeout(char **);
215static int setipcpterm(char **);
216static int setipcpconf(char **);
217static int setipcpfails(char **);
218static int setpaptimeout(char **);
219static int setpapreqs(char **);
220static int setpapreqtime(char **);
221static int setchaptimeout(char **);
222static int setchapchal(char **);
223static int setchapintv(char **);
224static int setipcpaccl(char **);
225static int setipcpaccr(char **);
226static int setlcpechointv(char **);
227static int setlcpechofails(char **);
228static int noccp(char **);
229static int setbsdcomp(char **);
230static int setnobsdcomp(char **);
231static int setdeflate(char **);
232static int setnodeflate(char **);
233static int setnodeflatedraft(char **);
234static int setdemand(char **);
235static int setpred1comp(char **);
236static int setnopred1comp(char **);
237static int setipparam(char **);
238static int setpapcrypt(char **);
239static int setidle(char **);
240static int setholdoff(char **);
241static int setdnsaddr(char **);
242static int setwinsaddr(char **);
243static int showversion(char **);
244static int showhelp(char **);
245
246#ifdef PPP_FILTER1
247static int setpdebug(char **);
248static int setpassfilter(char **);
249static int setactivefilter(char **);
250#endif
251
252#ifdef MSLANMAN
253static int setmslanman(char **);
254#endif
255
256static int number_option(char *, u_int32_t *, int);
257static int int_option(char *, int *);
258static int readable(int fd);
259
260/*
261 * Valid arguments.
262 */
263static struct cmd {
264 char *cmd_name;
265 int num_args;
266 int (*cmd_func)(char **);
267} cmds[] = {
268 {"-all", 0, noopt}, /* Don't request/allow any options (useless) */
269 {"noaccomp", 0, noaccomp}, /* Disable Address/Control compression */
270 {"-ac", 0, noaccomp}, /* Disable Address/Control compress */
271 {"default-asyncmap", 0, noasyncmap}, /* Disable asyncmap negoatiation */
272 {"-am", 0, noasyncmap}, /* Disable asyncmap negotiation */
273 {"-as", 1, setasyncmap}, /* set the desired async map */
274 {"-d", 0, setdebug}, /* Increase debugging level */
275 {"nodetach", 0, setnodetach}, /* Don't detach from controlling tty */
276 {"-detach", 0, setnodetach}, /* don't fork */
277 {"updetach", 0, setupdetach}, /* Detach once an NP has come up */
278 {"noip", 0, noip}, /* Disable IP and IPCP */
279 {"-ip", 0, noip}, /* Disable IP and IPCP */
280 {"nomagic", 0, nomagicnumber}, /* Disable magic number negotiation */
281 {"-mn", 0, nomagicnumber}, /* Disable magic number negotiation */
282 {"default-mru", 0, nomru}, /* Disable MRU negotiation */
283 {"-mru", 0, nomru}, /* Disable mru negotiation */
284 {"-p", 0, setpassive}, /* Set passive mode */
285 {"nopcomp", 0, nopcomp}, /* Disable protocol field compression */
286 {"-pc", 0, nopcomp}, /* Disable protocol field compress */
287 {"require-pap", 0, reqpap}, /* Require PAP authentication from peer */
288 {"+pap", 0, reqpap}, /* Require PAP auth from peer */
289 {"refuse-pap", 0, nopap}, /* Don't agree to auth to peer with PAP */
290 {"-pap", 0, nopap}, /* Don't allow UPAP authentication with peer */
291 {"require-chap", 0, reqchap}, /* Require CHAP authentication from peer */
292 {"+chap", 0, reqchap}, /* Require CHAP authentication from peer */
293 {"refuse-chap", 0, nochap}, /* Don't agree to auth to peer with CHAP */
294 {"-chap", 0, nochap}, /* Don't allow CHAP authentication with peer */
295 {"novj", 0, setnovj}, /* Disable VJ compression */
296 {"-vj", 0, setnovj}, /* disable VJ compression */
297 {"novjccomp", 0, setnovjccomp}, /* disable VJ connection-ID compression */
298 {"-vjccomp", 0, setnovjccomp}, /* disable VJ connection-ID compression */
299 {"vj-max-slots", 1, setvjslots}, /* Set maximum VJ header slots */
300 {"asyncmap", 1, setasyncmap}, /* set the desired async map */
301 {"escape", 1, setescape}, /* set chars to escape on transmission */
302 {"connect", 1, setconnector}, /* A program to set up a connection */
303 {"disconnect", 1, setdisconnector}, /* program to disconnect serial dev. */
304 {"welcome", 1, setwelcomer},/* Script to welcome client */
305 {"maxconnect", 1, setmaxconnect}, /* specify a maximum connect time */
306 {"crtscts", 0, setcrtscts}, /* set h/w flow control */
307 {"nocrtscts", 0, setnocrtscts}, /* clear h/w flow control */
308 {"-crtscts", 0, setnocrtscts}, /* clear h/w flow control */
309 {"xonxoff", 0, setxonxoff}, /* set s/w flow control */
310 {"debug", 0, setdebug}, /* Increase debugging level */
311 {"kdebug", 1, setkdebug}, /* Enable kernel-level debugging */
312 {"domain", 1, setdomain}, /* Add given domain name to hostname*/
313 {"mru", 1, setmru}, /* Set MRU value for negotiation */
314 {"mtu", 1, setmtu}, /* Set our MTU */
315#ifdef CBCP_SUPPORT
316 {"callback", 1, setcbcp}, /* Ask for callback */
317#endif
318 {"netmask", 1, setnetmask}, /* set netmask */
319 {"passive", 0, setpassive}, /* Set passive mode */
320 {"silent", 0, setsilent}, /* Set silent mode */
321 {"modem", 0, setmodem}, /* Use modem control lines */
322 {"modem_chat", 0, setmodem_chat}, /* Use modem control lines during chat */
323 {"local", 0, setlocal}, /* Don't use modem control lines */
324 {"lock", 0, setlock}, /* Lock serial device (with lock file) */
325 {"name", 1, setname}, /* Set local name for authentication */
326 {"user", 1, setuser}, /* Set name for auth with peer */
327 {"usehostname", 0, setusehostname}, /* Must use hostname for auth. */
328 {"remotename", 1, setremote}, /* Set remote name for authentication */
329 {"auth", 0, setauth}, /* Require authentication from peer */
330 {"noauth", 0, setnoauth}, /* Don't require peer to authenticate */
331 {"file", 1, readfile}, /* Take options from a file */
332 {"call", 1, callfile}, /* Take options from a privileged file */
333 {"defaultroute", 0, setdefaultroute}, /* Add default route */
334 {"nodefaultroute", 0, setnodefaultroute}, /* disable defaultroute option */
335 {"-defaultroute", 0, setnodefaultroute}, /* disable defaultroute option */
336 {"proxyarp", 0, setproxyarp}, /* Add proxy ARP entry */
337 {"noproxyarp", 0, setnoproxyarp}, /* disable proxyarp option */
338 {"-proxyarp", 0, setnoproxyarp}, /* disable proxyarp option */
339 {"persist", 0, setpersist}, /* Keep on reopening connection after close */
340 {"nopersist", 0, setnopersist}, /* Turn off persist option */
341 {"demand", 0, setdemand}, /* Dial on demand */
342 {"login", 0, setdologin}, /* Use system password database for UPAP */
343 {"noipdefault", 0, setnoipdflt}, /* Don't use name for default IP adrs */
344 {"lcp-echo-failure", 1, setlcpechofails}, /* consecutive echo failures */
345 {"lcp-echo-interval", 1, setlcpechointv}, /* time for lcp echo events */
346 {"lcp-restart", 1, setlcptimeout}, /* Set timeout for LCP */
347 {"lcp-max-terminate", 1, setlcpterm}, /* Set max #xmits for term-reqs */
348 {"lcp-max-configure", 1, setlcpconf}, /* Set max #xmits for conf-reqs */
349 {"lcp-max-failure", 1, setlcpfails}, /* Set max #conf-naks for LCP */
350 {"ipcp-restart", 1, setipcptimeout}, /* Set timeout for IPCP */
351 {"ipcp-max-terminate", 1, setipcpterm}, /* Set max #xmits for term-reqs */
352 {"ipcp-max-configure", 1, setipcpconf}, /* Set max #xmits for conf-reqs */
353 {"ipcp-max-failure", 1, setipcpfails}, /* Set max #conf-naks for IPCP */
354 {"pap-restart", 1, setpaptimeout}, /* Set retransmit timeout for PAP */
355 {"pap-max-authreq", 1, setpapreqs}, /* Set max #xmits for auth-reqs */
356 {"pap-timeout", 1, setpapreqtime}, /* Set time limit for peer PAP auth. */
357 {"chap-restart", 1, setchaptimeout}, /* Set timeout for CHAP */
358 {"chap-max-challenge", 1, setchapchal}, /* Set max #xmits for challenge */
359 {"chap-interval", 1, setchapintv}, /* Set interval for rechallenge */
360 {"ipcp-accept-local", 0, setipcpaccl}, /* Accept peer's address for us */
361 {"ipcp-accept-remote", 0, setipcpaccr}, /* Accept peer's address for it */
362 {"noccp", 0, noccp}, /* Disable CCP negotiation */
363 {"-ccp", 0, noccp}, /* Disable CCP negotiation */
364 {"bsdcomp", 1, setbsdcomp}, /* request BSD-Compress */
365 {"nobsdcomp", 0, setnobsdcomp}, /* don't allow BSD-Compress */
366 {"-bsdcomp", 0, setnobsdcomp}, /* don't allow BSD-Compress */
367 {"deflate", 1, setdeflate}, /* request Deflate compression */
368 {"nodeflate", 0, setnodeflate}, /* don't allow Deflate compression */
369 {"-deflate", 0, setnodeflate}, /* don't allow Deflate compression */
370 {"nodeflatedraft", 0, setnodeflatedraft}, /* don't use draft deflate # */
371 {"predictor1", 0, setpred1comp}, /* request Predictor-1 */
372 {"nopredictor1", 0, setnopred1comp},/* don't allow Predictor-1 */
373 {"-predictor1", 0, setnopred1comp}, /* don't allow Predictor-1 */
374 {"ipparam", 1, setipparam}, /* set ip script parameter */
375 {"papcrypt", 0, setpapcrypt}, /* PAP passwords encrypted */
376 {"idle", 1, setidle}, /* idle time limit (seconds) */
377 {"holdoff", 1, setholdoff}, /* set holdoff time (seconds) */
378 {"ms-dns", 1, setdnsaddr}, /* DNS address for the peer's use */
379 {"ms-wins", 1, setwinsaddr}, /* Nameserver for SMB over TCP/IP for peer */
380 {"--version", 0, showversion}, /* Show version number */
381 {"--help", 0, showhelp}, /* Show brief listing of options */
382 {"-h", 0, showhelp}, /* ditto */
383
384#ifdef PPP_FILTER1
385 {"pdebug", 1, setpdebug}, /* libpcap debugging */
386 {"pass-filter", 1, setpassfilter}, /* set filter for packets to pass */
387 {"active-filter", 1, setactivefilter}, /* set filter for active pkts */
388#endif
389
390#ifdef MSLANMAN
391 {"ms-lanman", 0, setmslanman}, /* Use LanMan psswd when using MS-CHAP */
392#endif
393
394 {NULL((void *)0), 0, NULL((void *)0)}
395};
396
397
398#ifndef IMPLEMENTATION""
399#define IMPLEMENTATION"" ""
400#endif
401
402static const char usage_string[] = "\
403pppd version %s patch level %d%s\n\
404Usage: %s [ options ], where options are:\n\
405 <device> Communicate over the named device\n\
406 <speed> Set the baud rate to <speed>\n\
407 <loc>:<rem> Set the local and/or remote interface IP\n\
408 addresses. Either one may be omitted.\n\
409 asyncmap <n> Set the desired async map to hex <n>\n\
410 auth Require authentication from peer\n\
411 connect <p> Invoke shell command <p> to set up the serial line\n\
412 crtscts Use hardware RTS/CTS flow control\n\
413 defaultroute Add default route through interface\n\
414 file <f> Take options from file <f>\n\
415 modem Use modem control lines\n\
416 modem_chat Use modem control lines during chat\n\
417 mru <n> Set MRU value to <n> for negotiation\n\
418 netmask <n> Set interface netmask to <n>\n\
419See pppd(8) for more options.\n\
420";
421
422static char *current_option; /* the name of the option being parsed */
423static int privileged_option; /* set iff the current option came from root */
424static char *option_source; /* string saying where the option came from */
425
426/*
427 * parse_args - parse a string of arguments from the command line.
428 */
429int
430parse_args(argc, argv)
431 int argc;
432 char **argv;
433{
434 char *arg;
435 struct cmd *cmdp;
436 int ret;
437
438 privileged_option = privileged;
439 option_source = "command line";
440 while (argc > 0) {
441 arg = *argv++;
442 --argc;
443
444 /*
445 * First see if it's a command.
446 */
447 for (cmdp = cmds; cmdp->cmd_name; cmdp++)
448 if (!strcmp(arg, cmdp->cmd_name))
449 break;
450
451 if (cmdp->cmd_name != NULL((void *)0)) {
452 if (argc < cmdp->num_args) {
453 option_error("too few parameters for option %s", arg);
454 return 0;
455 }
456 current_option = arg;
457 if (!(*cmdp->cmd_func)(argv))
458 return 0;
459 argc -= cmdp->num_args;
460 argv += cmdp->num_args;
461
462 } else {
463 /*
464 * Maybe a tty name, speed or IP address?
465 */
466 if ((ret = setdevname(arg, 0)) == 0
467 && (ret = setspeed(arg)) == 0
468 && (ret = setipaddr(arg)) == 0) {
469 option_error("unrecognized option '%s'", arg);
470 usage();
471 return 0;
472 }
473 if (ret < 0) /* error */
474 return 0;
475 }
476 }
477 return 1;
478}
479
480/*
481 * scan_args - scan the command line arguments to get the tty name,
482 * if specified.
483 */
484void
485scan_args(argc, argv)
486 int argc;
487 char **argv;
488{
489 char *arg;
490 struct cmd *cmdp;
491
492 while (argc > 0) {
493 arg = *argv++;
494 --argc;
495
496 /* Skip options and their arguments */
497 for (cmdp = cmds; cmdp->cmd_name; cmdp++)
498 if (!strcmp(arg, cmdp->cmd_name))
499 break;
500
501 if (cmdp->cmd_name != NULL((void *)0)) {
502 argc -= cmdp->num_args;
503 argv += cmdp->num_args;
504 continue;
505 }
506
507 /* Check if it's a tty name and copy it if so */
508 (void) setdevname(arg, 1);
509 }
510}
511
512/*
513 * usage - print out a message telling how to use the program.
514 */
515void
516usage()
517{
518 if (phase == PHASE_INITIALIZE1)
519 fprintf(stderr(&__sF[2]), usage_string, VERSION"2.3", PATCHLEVEL5, IMPLEMENTATION"",
520 __progname);
521}
522
523/*
524 * showhelp - print out usage message and exit.
525 */
526static int
527showhelp(argv)
528 char **argv;
529{
530 if (phase == PHASE_INITIALIZE1) {
531 usage();
532 exit(0);
533 }
534 return 0;
535}
536
537/*
538 * showversion - print out the version number and exit.
539 */
540static int
541showversion(argv)
542 char **argv;
543{
544 if (phase == PHASE_INITIALIZE1) {
545 fprintf(stderr(&__sF[2]), "pppd version %s patch level %d%s\n",
546 VERSION"2.3", PATCHLEVEL5, IMPLEMENTATION"");
547 exit(0);
548 }
549 return 0;
550}
551
552/*
553 * options_from_file - Read a string of options from a file,
554 * and interpret them.
555 */
556int
557options_from_file(filename, must_exist, check_prot, priv)
558 char *filename;
559 int must_exist;
560 int check_prot;
561 int priv;
562{
563 FILE *f;
564 int i, newline, ret;
565 struct cmd *cmdp;
566 int oldpriv;
567 char *argv[MAXARGS1];
568 char args[MAXARGS1][MAXWORDLEN1024];
569 char cmd[MAXWORDLEN1024];
570
571 if ((f = fopen(filename, "r")) == NULL((void *)0)) {
572 if (!must_exist && errno(*__errno()) == ENOENT2)
573 return 1;
574 option_error("Can't open options file %s: %m", filename);
575 return 0;
576 }
577 if (check_prot && !readable(fileno(f)(!__isthreaded ? ((f)->_file) : (fileno)(f)))) {
578 option_error("Can't open options file %s: access denied", filename);
579 fclose(f);
580 return 0;
581 }
582
583 oldpriv = privileged_option;
584 privileged_option = priv;
585 ret = 0;
586 while (getword(f, cmd, &newline, filename)) {
587 /*
588 * First see if it's a command.
589 */
590 for (cmdp = cmds; cmdp->cmd_name; cmdp++)
591 if (!strcmp(cmd, cmdp->cmd_name))
592 break;
593
594 if (cmdp->cmd_name != NULL((void *)0)) {
595 for (i = 0; i < cmdp->num_args; ++i) {
596 if (!getword(f, args[i], &newline, filename)) {
597 option_error(
598 "In file %s: too few parameters for option '%s'",
599 filename, cmd);
600 goto err;
601 }
602 argv[i] = args[i];
603 }
604 current_option = cmd;
605 if (!(*cmdp->cmd_func)(argv))
606 goto err;
607
608 } else {
609 /*
610 * Maybe a tty name, speed or IP address?
611 */
612 if ((i = setdevname(cmd, 0)) == 0
613 && (i = setspeed(cmd)) == 0
614 && (i = setipaddr(cmd)) == 0) {
615 option_error("In file %s: unrecognized option '%s'",
616 filename, cmd);
617 goto err;
618 }
619 if (i < 0) /* error */
620 goto err;
621 }
622 }
623 ret = 1;
624
625err:
626 fclose(f);
627 privileged_option = oldpriv;
628 return ret;
629}
630
631/*
632 * options_from_user - See if the use has a ~/.ppprc file,
633 * and if so, interpret options from it.
634 */
635int
636options_from_user()
637{
638 char *user, *path, *file;
639 int ret;
640 struct passwd *pw;
641
642 pw = getpwuid(getuid());
643 if (pw == NULL((void *)0) || (user = pw->pw_dir) == NULL((void *)0) || user[0] == 0)
644 return 1;
645 file = _PATH_USEROPT".ppprc";
646 if (asprintf(&path, "%s/%s", user, file) == -1)
647 novm("init file name");
648 ret = options_from_file(path, 0, 1, privileged);
649 free(path);
650 return ret;
651}
652
653/*
654 * options_for_tty - See if an options file exists for the serial
655 * device, and if so, interpret options from it.
656 */
657int
658options_for_tty()
659{
660 char *dev, *path;
661 int ret;
662
663 dev = devnam;
664 if (strncmp(dev, "/dev/", 5) == 0)
665 dev += 5;
666 if (strcmp(dev, "tty") == 0)
667 return 1; /* don't look for /etc/ppp/options.tty */
668 if (asprintf(&path, "%s%s", _PATH_TTYOPT"/etc/ppp/options.", dev) == -1)
669 novm("tty init file name");
670 ret = options_from_file(path, 0, 0, 1);
671 free(path);
672 return ret;
673}
674
675/*
676 * option_error - print a message about an error in an option.
677 * The message is logged, and also sent to
678 * stderr if phase == PHASE_INITIALIZE.
679 */
680void
681option_error(char *fmt, ...)
682{
683 va_list args;
684 char buf[256];
685
686 va_start(args, fmt)__builtin_va_start(args, fmt);
687 vfmtmsg(buf, sizeof(buf), fmt, args);
688 va_end(args)__builtin_va_end(args);
689 if (phase == PHASE_INITIALIZE1)
690 fprintf(stderr(&__sF[2]), "%s: %s\n", __progname, buf);
691 syslog(LOG_ERR3, "%s", buf);
692}
693
694/*
695 * readable - check if a file is readable by the real user.
696 */
697static int
698readable(fd)
699 int fd;
700{
701 uid_t uid;
702 int ngroups, i;
703 struct stat sbuf;
704 GIDSET_TYPEgid_t groups[NGROUPS_MAX16];
705
706 uid = getuid();
707 if (uid == 0)
708 return 1;
709 if (fstat(fd, &sbuf) != 0)
710 return 0;
711 if (sbuf.st_uid == uid)
712 return sbuf.st_mode & S_IRUSR0000400;
713 if (sbuf.st_gid == getgid())
714 return sbuf.st_mode & S_IRGRP0000040;
715 ngroups = getgroups(NGROUPS_MAX16, groups);
716 for (i = 0; i < ngroups; ++i)
717 if (sbuf.st_gid == groups[i])
718 return sbuf.st_mode & S_IRGRP0000040;
719 return sbuf.st_mode & S_IROTH0000004;
720}
721
722/*
723 * Read a word from a file.
724 * Words are delimited by white-space or by quotes (" or ').
725 * Quotes, white-space and \ may be escaped with \.
726 * \<newline> is ignored.
727 */
728int
729getword(f, word, newlinep, filename)
730 FILE *f;
731 char *word;
732 int *newlinep;
733 char *filename;
734{
735 int c, len, escape;
736 int quoted, comment;
737 int value, digit, got, n;
738
739#define isoctal(c) ((c) >= '0' && (c) < '8')
740
741 *newlinep = 0;
742 len = 0;
743 escape = 0;
744 comment = 0;
745
746 /*
747 * First skip white-space and comments.
748 */
749 for (;;) {
750 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
751 if (c == EOF(-1))
752 break;
753
754 /*
755 * A newline means the end of a comment; backslash-newline
756 * is ignored. Note that we cannot have escape && comment.
757 */
758 if (c == '\n') {
759 if (!escape) {
760 *newlinep = 1;
761 comment = 0;
762 } else
763 escape = 0;
764 continue;
765 }
766
767 /*
768 * Ignore characters other than newline in a comment.
769 */
770 if (comment)
771 continue;
772
773 /*
774 * If this character is escaped, we have a word start.
775 */
776 if (escape)
777 break;
778
779 /*
780 * If this is the escape character, look at the next character.
781 */
782 if (c == '\\') {
783 escape = 1;
784 continue;
785 }
786
787 /*
788 * If this is the start of a comment, ignore the rest of the line.
789 */
790 if (c == '#') {
791 comment = 1;
792 continue;
793 }
794
795 /*
796 * A non-whitespace character is the start of a word.
797 */
798 if (!isspace(c))
799 break;
800 }
801
802 /*
803 * Save the delimiter for quoted strings.
804 */
805 if (!escape && (c == '"' || c == '\'')) {
806 quoted = c;
807 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
808 } else
809 quoted = 0;
810
811 /*
812 * Process characters until the end of the word.
813 */
814 while (c != EOF(-1)) {
815 if (escape) {
816 /*
817 * This character is escaped: backslash-newline is ignored,
818 * various other characters indicate particular values
819 * as for C backslash-escapes.
820 */
821 escape = 0;
822 if (c == '\n') {
823 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
824 continue;
825 }
826
827 got = 0;
828 switch (c) {
829 case 'a':
830 value = '\a';
831 break;
832 case 'b':
833 value = '\b';
834 break;
835 case 'f':
836 value = '\f';
837 break;
838 case 'n':
839 value = '\n';
840 break;
841 case 'r':
842 value = '\r';
843 break;
844 case 's':
845 value = ' ';
846 break;
847 case 't':
848 value = '\t';
849 break;
850
851 default:
852 if (isoctal(c)) {
853 /*
854 * \ddd octal sequence
855 */
856 value = 0;
857 for (n = 0; n < 3 && isoctal(c); ++n) {
858 value = (value << 3) + (c & 07);
859 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
860 }
861 got = 1;
862 break;
863 }
864
865 if (c == 'x') {
866 /*
867 * \x<hex_string> sequence
868 */
869 value = 0;
870 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
871 for (n = 0; n < 2 && isxdigit(c); ++n) {
872 digit = toupper(c) - '0';
873 if (digit > 10)
874 digit += '0' + 10 - 'A';
875 value = (value << 4) + digit;
876 c = getc (f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
877 }
878 got = 1;
879 break;
880 }
881
882 /*
883 * Otherwise the character stands for itself.
884 */
885 value = c;
886 break;
887 }
888
889 /*
890 * Store the resulting character for the escape sequence.
891 */
892 if (len < MAXWORDLEN1024) {
893 word[len] = value;
894 ++len;
895 }
896
897 if (!got)
898 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
899 continue;
900
901 }
902
903 /*
904 * Not escaped: see if we've reached the end of the word.
905 */
906 if (quoted) {
907 if (c == quoted)
908 break;
909 } else {
910 if (isspace(c) || c == '#') {
911 ungetc (c, f);
912 break;
913 }
914 }
915
916 /*
917 * Backslash starts an escape sequence.
918 */
919 if (c == '\\') {
920 escape = 1;
921 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
922 continue;
923 }
924
925 /*
926 * An ordinary character: store it in the word and get another.
927 */
928 if (len < MAXWORDLEN1024) {
929 word[len] = c;
930 ++len;
931 }
932
933 c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*(
f)->_p++)) : (getc)(f));
934 }
935
936 /*
937 * End of the word: check for errors.
938 */
939 if (c == EOF(-1)) {
940 if (ferror(f)(!__isthreaded ? (((f)->_flags & 0x0040) != 0) : (ferror
)(f))) {
941 if (errno(*__errno()) == 0)
942 errno(*__errno()) = EIO5;
943 option_error("Error reading %s: %m", filename);
944 die(1);
945 }
946 /*
947 * If len is zero, then we didn't find a word before the
948 * end of the file.
949 */
950 if (len == 0)
951 return 0;
952 }
953
954 /*
955 * Warn if the word was too long, and append a terminating null.
956 */
957 if (len >= MAXWORDLEN1024) {
958 option_error("warning: word in file %s too long (%.20s...)",
959 filename, word);
960 len = MAXWORDLEN1024 - 1;
961 }
962 word[len] = 0;
963
964 return 1;
965
966#undef isoctal
967
968}
969
970/*
971 * number_option - parse an unsigned numeric parameter for an option.
972 */
973static int
974number_option(str, valp, base)
975 char *str;
976 u_int32_t *valp;
977 int base;
978{
979 char *ptr;
980
981 *valp = strtoul(str, &ptr, base);
982 if (ptr == str) {
983 option_error("invalid numeric parameter '%s' for %s option",
984 str, current_option);
985 return 0;
986 }
987 return 1;
988}
989
990
991/*
992 * int_option - like number_option, but valp is int *,
993 * the base is assumed to be 0, and *valp is not changed
994 * if there is an error.
995 */
996static int
997int_option(str, valp)
998 char *str;
999 int *valp;
1000{
1001 u_int32_t v;
1002
1003 if (!number_option(str, &v, 0))
1004 return 0;
1005 *valp = (int) v;
1006 return 1;
1007}
1008
1009
1010/*
1011 * The following procedures parse options.
1012 */
1013
1014/*
1015 * readfile - take commands from a file.
1016 */
1017static int
1018readfile(argv)
1019 char **argv;
1020{
1021 return options_from_file(*argv, 1, 1, privileged_option);
1022}
1023
1024/*
1025 * callfile - take commands from /etc/ppp/peers/<name>.
1026 * Name may not contain /../, start with / or ../, or end in /..
1027 */
1028static int
1029callfile(argv)
1030 char **argv;
1031{
1032 char *fname, *arg, *p;
1033 int l, ok;
1034
1035 arg = *argv;
1036 ok = 1;
1037 if (arg[0] == '/' || arg[0] == 0)
1
Assuming the condition is false
→
2
←
Assuming the condition is false
→
3
←
Taking false branch
→
1038 ok = 0;
1039 else {
1040 for (p = arg; *p != 0; ) {
4
←
Loop condition is true. Entering loop body
→
11
←
Loop condition is false. Execution continues on line 1051
→
1041 if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) {
5
←
Assuming the condition is false
→
1042 ok = 0;
1043 break;
1044 }
1045 while (*p != '/' && *p != 0)
6
←
Loop condition is true. Entering loop body
→
7
←
Assuming the condition is true
→
8
←
Assuming the condition is false
→
9
←
Loop condition is false. Execution continues on line 1047
→
1046 ++p;
1047 if (*p == '/')
10
←
Taking false branch
→
1048 ++p;
1049 }
1050 }
1051 if (!ok
11.1
'ok' is 1
) {
12
←
Taking false branch
→
1052 option_error("call option value may not contain .. or start with /");
1053 return 0;
1054 }
1055
1056 l = strlen(arg) + strlen(_PATH_PEERFILES"/etc/ppp/peers/") + 1;
1057 if ((fname = (char *) malloc(l)) == NULL((void *)0))
13
←
Value assigned to 'fname'
→
14
←
Assuming pointer value is null
→
15
←
Taking true branch
→
1058 novm("call file name");
1059 strlcpy(fname, _PATH_PEERFILES"/etc/ppp/peers/", l);
16
←
Null pointer passed as 1st argument to string copy function
1060 strlcat(fname, arg, l);
1061
1062 ok = options_from_file(fname, 1, 1, 1);
1063
1064 free(fname);
1065 return ok;
1066}
1067
1068
1069/*
1070 * setdebug - Set debug (command line argument).
1071 */
1072static int
1073setdebug(argv)
1074 char **argv;
1075{
1076 debug++;
1077 return (1);
1078}
1079
1080/*
1081 * setkdebug - Set kernel debugging level.
1082 */
1083static int
1084setkdebug(argv)
1085 char **argv;
1086{
1087 return int_option(*argv, &kdebugflag);
1088}
1089
1090#ifdef PPP_FILTER1
1091/*
1092 * setpdebug - Set libpcap debugging level.
1093 */
1094static int
1095setpdebug(argv)
1096 char **argv;
1097{
1098 return int_option(*argv, &dflag);
1099}
1100
1101/*
1102 * setpassfilter - Set the pass filter for packets
1103 */
1104static int
1105setpassfilter(argv)
1106 char **argv;
1107{
1108 pc.linktype = DLT_PPP9;
1109 pc.snapshot = PPP_HDRLEN4;
1110
1111 if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0)
1112 return 1;
1113 option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc));
1114 return 0;
1115}
1116
1117/*
1118 * setactivefilter - Set the active filter for packets
1119 */
1120static int
1121setactivefilter(argv)
1122 char **argv;
1123{
1124 pc.linktype = DLT_PPP9;
1125 pc.snapshot = PPP_HDRLEN4;
1126
1127 if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0)
1128 return 1;
1129 option_error("error in active-filter expression: %s\n", pcap_geterr(&pc));
1130 return 0;
1131}
1132#endif
1133
1134/*
1135 * noopt - Disable all options.
1136 */
1137static int
1138noopt(argv)
1139 char **argv;
1140{
1141 BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options))memset((char *) &lcp_wantoptions[0], 0, sizeof (struct lcp_options
));
1142 BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options))memset((char *) &lcp_allowoptions[0], 0, sizeof (struct lcp_options
));
1143 BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options))memset((char *) &ipcp_wantoptions[0], 0, sizeof (struct ipcp_options
));
1144 BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options))memset((char *) &ipcp_allowoptions[0], 0, sizeof (struct ipcp_options
));
1145
1146 return (1);
1147}
1148
1149/*
1150 * noaccomp - Disable Address/Control field compression negotiation.
1151 */
1152static int
1153noaccomp(argv)
1154 char **argv;
1155{
1156 lcp_wantoptions[0].neg_accompression = 0;
1157 lcp_allowoptions[0].neg_accompression = 0;
1158 return (1);
1159}
1160
1161
1162/*
1163 * noasyncmap - Disable async map negotiation.
1164 */
1165static int
1166noasyncmap(argv)
1167 char **argv;
1168{
1169 lcp_wantoptions[0].neg_asyncmap = 0;
1170 lcp_allowoptions[0].neg_asyncmap = 0;
1171 return (1);
1172}
1173
1174
1175/*
1176 * noip - Disable IP and IPCP.
1177 */
1178static int
1179noip(argv)
1180 char **argv;
1181{
1182 ipcp_protent.enabled_flag = 0;
1183 return (1);
1184}
1185
1186
1187/*
1188 * nomagicnumber - Disable magic number negotiation.
1189 */
1190static int
1191nomagicnumber(argv)
1192 char **argv;
1193{
1194 lcp_wantoptions[0].neg_magicnumber = 0;
1195 lcp_allowoptions[0].neg_magicnumber = 0;
1196 return (1);
1197}
1198
1199
1200/*
1201 * nomru - Disable mru negotiation.
1202 */
1203static int
1204nomru(argv)
1205 char **argv;
1206{
1207 lcp_wantoptions[0].neg_mru = 0;
1208 lcp_allowoptions[0].neg_mru = 0;
1209 return (1);
1210}
1211
1212
1213/*
1214 * setmru - Set MRU for negotiation.
1215 */
1216static int
1217setmru(argv)
1218 char **argv;
1219{
1220 u_int32_t mru;
1221
1222 if (!number_option(*argv, &mru, 0))
1223 return 0;
1224 lcp_wantoptions[0].mru = mru;
1225 lcp_wantoptions[0].neg_mru = 1;
1226 return (1);
1227}
1228
1229
1230/*
1231 * setmru - Set the largest MTU we'll use.
1232 */
1233static int
1234setmtu(argv)
1235 char **argv;
1236{
1237 u_int32_t mtu;
1238
1239 if (!number_option(*argv, &mtu, 0))
1240 return 0;
1241 if (mtu < MINMRU128 || mtu > MAXMRU16384) {
1242 option_error("mtu option value of %u is too %s", mtu,
1243 (mtu < MINMRU128? "small": "large"));
1244 return 0;
1245 }
1246 lcp_allowoptions[0].mru = mtu;
1247 return (1);
1248}
1249
1250#ifdef CBCP_SUPPORT
1251static int
1252setcbcp(argv)
1253 char **argv;
1254{
1255 lcp_wantoptions[0].neg_cbcp = 1;
1256 cbcp_protent.enabled_flag = 1;
1257 cbcp[0].us_number = strdup(*argv);
1258 if (cbcp[0].us_number == 0)
1259 novm("callback number");
1260 cbcp[0].us_type |= (1 << CB_CONF_USER);
1261 cbcp[0].us_type |= (1 << CB_CONF_ADMIN);
1262 return (1);
1263}
1264#endif
1265
1266/*
1267 * nopcomp - Disable Protocol field compression negotiation.
1268 */
1269static int
1270nopcomp(argv)
1271 char **argv;
1272{
1273 lcp_wantoptions[0].neg_pcompression = 0;
1274 lcp_allowoptions[0].neg_pcompression = 0;
1275 return (1);
1276}
1277
1278
1279/*
1280 * setpassive - Set passive mode (don't give up if we time out sending
1281 * LCP configure-requests).
1282 */
1283static int
1284setpassive(argv)
1285 char **argv;
1286{
1287 lcp_wantoptions[0].passive = 1;
1288 return (1);
1289}
1290
1291
1292/*
1293 * setsilent - Set silent mode (don't start sending LCP configure-requests
1294 * until we get one from the peer).
1295 */
1296static int
1297setsilent(argv)
1298 char **argv;
1299{
1300 lcp_wantoptions[0].silent = 1;
1301 return 1;
1302}
1303
1304
1305/*
1306 * nopap - Disable PAP authentication with peer.
1307 */
1308static int
1309nopap(argv)
1310 char **argv;
1311{
1312 refuse_pap = 1;
1313 return (1);
1314}
1315
1316
1317/*
1318 * reqpap - Require PAP authentication from peer.
1319 */
1320static int
1321reqpap(argv)
1322 char **argv;
1323{
1324 lcp_wantoptions[0].neg_upap = 1;
1325 setauth(NULL((void *)0));
1326 return 1;
1327}
1328
1329/*
1330 * nochap - Disable CHAP authentication with peer.
1331 */
1332static int
1333nochap(argv)
1334 char **argv;
1335{
1336 refuse_chap = 1;
1337 return (1);
1338}
1339
1340
1341/*
1342 * reqchap - Require CHAP authentication from peer.
1343 */
1344static int
1345reqchap(argv)
1346 char **argv;
1347{
1348 lcp_wantoptions[0].neg_chap = 1;
1349 setauth(NULL((void *)0));
1350 return (1);
1351}
1352
1353
1354/*
1355 * setnovj - disable vj compression
1356 */
1357static int
1358setnovj(argv)
1359 char **argv;
1360{
1361 ipcp_wantoptions[0].neg_vj = 0;
1362 ipcp_allowoptions[0].neg_vj = 0;
1363 return (1);
1364}
1365
1366
1367/*
1368 * setnovjccomp - disable VJ connection-ID compression
1369 */
1370static int
1371setnovjccomp(argv)
1372 char **argv;
1373{
1374 ipcp_wantoptions[0].cflag = 0;
1375 ipcp_allowoptions[0].cflag = 0;
1376 return 1;
1377}
1378
1379
1380/*
1381 * setvjslots - set maximum number of connection slots for VJ compression
1382 */
1383static int
1384setvjslots(argv)
1385 char **argv;
1386{
1387 int value;
1388
1389 if (!int_option(*argv, &value))
1390 return 0;
1391 if (value < 2 || value > 16) {
1392 option_error("vj-max-slots value must be between 2 and 16");
1393 return 0;
1394 }
1395 ipcp_wantoptions [0].maxslotindex =
1396 ipcp_allowoptions[0].maxslotindex = value - 1;
1397 return 1;
1398}
1399
1400
1401/*
1402 * setconnector - Set a program to connect to a serial line
1403 */
1404static int
1405setconnector(argv)
1406 char **argv;
1407{
1408 connector = strdup(*argv);
1409 if (connector == NULL((void *)0))
1410 novm("connect script");
1411 connector_info.priv = privileged_option;
1412 connector_info.source = option_source;
1413
1414 return (1);
1415}
1416
1417/*
1418 * setdisconnector - Set a program to disconnect from the serial line
1419 */
1420static int
1421setdisconnector(argv)
1422 char **argv;
1423{
1424 disconnector = strdup(*argv);
1425 if (disconnector == NULL((void *)0))
1426 novm("disconnect script");
1427 disconnector_info.priv = privileged_option;
1428 disconnector_info.source = option_source;
1429
1430 return (1);
1431}
1432
1433/*
1434 * setwelcomer - Set a program to welcome a client after connection
1435 */
1436static int
1437setwelcomer(argv)
1438 char **argv;
1439{
1440 welcomer = strdup(*argv);
1441 if (welcomer == NULL((void *)0))
1442 novm("welcome script");
1443 welcomer_info.priv = privileged_option;
1444 welcomer_info.source = option_source;
1445
1446 return (1);
1447}
1448
1449/*
1450 * setmaxconnect - Set the maximum connect time
1451 */
1452static int
1453setmaxconnect(argv)
1454 char **argv;
1455{
1456 int value;
1457
1458 if (!int_option(*argv, &value))
1459 return 0;
1460 if (value < 0) {
1461 option_error("maxconnect time must be positive");
1462 return 0;
1463 }
1464 if (maxconnect > 0 && (value == 0 || value > maxconnect)) {
1465 option_error("maxconnect time cannot be increased");
1466 return 0;
1467 }
1468 maxconnect = value;
1469 return 1;
1470}
1471
1472/*
1473 * setdomain - Set domain name to append to hostname
1474 */
1475static int
1476setdomain(argv)
1477 char **argv;
1478{
1479 if (!privileged_option) {
1480 option_error("using the domain option requires root privilege");
1481 return 0;
1482 }
1483 gethostname(hostname, MAXNAMELEN256);
1484 if (**argv != 0) {
1485 if (**argv != '.')
1486 strlcat(hostname, ".", MAXNAMELEN256);
1487 strlcat(hostname, *argv, MAXNAMELEN256);
1488 }
1489 hostname[MAXNAMELEN256-1] = 0;
1490 return (1);
1491}
1492
1493
1494/*
1495 * setasyncmap - add bits to asyncmap (what we request peer to escape).
1496 */
1497static int
1498setasyncmap(argv)
1499 char **argv;
1500{
1501 u_int32_t asyncmap;
1502
1503 if (!number_option(*argv, &asyncmap, 16))
1504 return 0;
1505 lcp_wantoptions[0].asyncmap |= asyncmap;
1506 lcp_wantoptions[0].neg_asyncmap = 1;
1507 return(1);
1508}
1509
1510
1511/*
1512 * setescape - add chars to the set we escape on transmission.
1513 */
1514static int
1515setescape(argv)
1516 char **argv;
1517{
1518 int n, ret;
1519 char *p, *endp;
1520
1521 p = *argv;
1522 ret = 1;
1523 while (*p) {
1524 n = strtol(p, &endp, 16);
1525 if (p == endp) {
1526 option_error("escape parameter contains invalid hex number '%s'",
1527 p);
1528 return 0;
1529 }
1530 p = endp;
1531 if (n < 0 || (0x20 <= n && n <= 0x3F) || n == 0x5E || n > 0xFF) {
1532 option_error("can't escape character 0x%x", n);
1533 ret = 0;
1534 } else
1535 xmit_accm[0][n >> 5] |= 1 << (n & 0x1F);
1536 while (*p == ',' || *p == ' ')
1537 ++p;
1538 }
1539 return ret;
1540}
1541
1542
1543/*
1544 * setspeed - Set the speed.
1545 */
1546static int
1547setspeed(arg)
1548 char *arg;
1549{
1550 char *ptr;
1551 int spd;
1552
1553 spd = strtol(arg, &ptr, 0);
1554 if (ptr == arg || *ptr != 0 || spd == 0)
1555 return 0;
1556 inspeed = spd;
1557 return 1;
1558}
1559
1560
1561/*
1562 * setdevname - Set the device name.
1563 */
1564static int
1565setdevname(cp, quiet)
1566 char *cp;
1567 int quiet;
1568{
1569 struct stat statbuf;
1570 char dev[PATH_MAX1024];
1571
1572 if (*cp == 0)
1573 return 0;
1574
1575 if (strncmp("/dev/", cp, 5) != 0) {
1576 strlcpy(dev, "/dev/", sizeof dev);
1577 strlcat(dev, cp, sizeof dev);
1578 cp = dev;
1579 }
1580
1581 /*
1582 * Check if there is a device by this name.
1583 */
1584 if (stat(cp, &statbuf) < 0) {
1585 if (errno(*__errno()) == ENOENT2 || quiet)
1586 return 0;
1587 option_error("Couldn't stat %s: %m", cp);
1588 return -1;
1589 }
1590
1591 (void) strlcpy(devnam, cp, PATH_MAX1024);
1592 default_device = FALSE0;
1593 devnam_info.priv = privileged_option;
1594 devnam_info.source = option_source;
1595
1596 return 1;
1597}
1598
1599
1600/*
1601 * setipaddr - Set the IP address
1602 */
1603static int
1604setipaddr(arg)
1605 char *arg;
1606{
1607 struct hostent *hp;
1608 char *colon;
1609 struct in_addr ina;
1610 u_int32_t local, remote;
1611 ipcp_options *wo = &ipcp_wantoptions[0];
1612
1613 /*
1614 * IP address pair separated by ":".
1615 */
1616 if ((colon = strchr(arg, ':')) == NULL((void *)0))
1617 return 0;
1618
1619 /*
1620 * If colon first character, then no local addr.
1621 */
1622 if (colon != arg) {
1623 *colon = '\0';
1624 if (inet_aton(arg, &ina) == 0) {
1625 if ((hp = gethostbyname(arg)) == NULL((void *)0)) {
1626 option_error("unknown host: %s", arg);
1627 return -1;
1628 } else {
1629 local = *(u_int32_t *)hp->h_addrh_addr_list[0];
1630 if (our_name[0] == 0)
1631 strlcpy(our_name, arg, MAXNAMELEN256);
1632 }
1633 } else
1634 local = ina.s_addr;
1635 if (bad_ip_adrs(local)) {
1636 option_error("bad local IP address %s", ip_ntoa(local));
1637 return -1;
1638 }
1639 if (local != 0)
1640 wo->ouraddr = local;
1641 *colon = ':';
1642 }
1643
1644 /*
1645 * If colon last character, then no remote addr.
1646 */
1647 if (*++colon != '\0') {
1648 if (inet_aton(colon, &ina) == 0) {
1649 if ((hp = gethostbyname(colon)) == NULL((void *)0)) {
1650 option_error("unknown host: %s", colon);
1651 return -1;
1652 } else {
1653 remote = *(u_int32_t *)hp->h_addrh_addr_list[0];
1654 if (remote_name[0] == 0)
1655 strlcpy(remote_name, colon, MAXNAMELEN256);
1656 }
1657 } else
1658 remote = ina.s_addr;
1659 if (bad_ip_adrs(remote)) {
1660 option_error("bad remote IP address %s", ip_ntoa(remote));
1661 return -1;
1662 }
1663 if (remote != 0)
1664 wo->hisaddr = remote;
1665 }
1666
1667 return 1;
1668}
1669
1670
1671/*
1672 * setnoipdflt - disable setipdefault()
1673 */
1674static int
1675setnoipdflt(argv)
1676 char **argv;
1677{
1678 disable_defaultip = 1;
1679 return 1;
1680}
1681
1682
1683/*
1684 * setipcpaccl - accept peer's idea of our address
1685 */
1686static int
1687setipcpaccl(argv)
1688 char **argv;
1689{
1690 ipcp_wantoptions[0].accept_local = 1;
1691 return 1;
1692}
1693
1694
1695/*
1696 * setipcpaccr - accept peer's idea of its address
1697 */
1698static int
1699setipcpaccr(argv)
1700 char **argv;
1701{
1702 ipcp_wantoptions[0].accept_remote = 1;
1703 return 1;
1704}
1705
1706
1707/*
1708 * setnetmask - set the netmask to be used on the interface.
1709 */
1710static int
1711setnetmask(argv)
1712 char **argv;
1713{
1714 struct in_addr ina;
1715
1716 if (inet_aton(*argv, &ina) == 0 || (netmask & ~ina.s_addr) != 0) {
1717 option_error("invalid netmask value '%s'", *argv);
1718 return (0);
1719 }
1720
1721 netmask = ina.s_addr;
1722 return (1);
1723}
1724
1725static int
1726setcrtscts(argv)
1727 char **argv;
1728{
1729 crtscts = 1;
1730 return (1);
1731}
1732
1733static int
1734setnocrtscts(argv)
1735 char **argv;
1736{
1737 crtscts = -1;
1738 return (1);
1739}
1740
1741static int
1742setxonxoff(argv)
1743 char **argv;
1744{
1745 lcp_wantoptions[0].asyncmap |= 0x000A0000; /* escape ^S and ^Q */
1746 lcp_wantoptions[0].neg_asyncmap = 1;
1747
1748 crtscts = -2;
1749 return (1);
1750}
1751
1752static int
1753setnodetach(argv)
1754 char **argv;
1755{
1756 nodetach = 1;
1757 return (1);
1758}
1759
1760static int
1761setupdetach(argv)
1762 char **argv;
1763{
1764 nodetach = -1;
1765 return (1);
1766}
1767
1768static int
1769setdemand(argv)
1770 char **argv;
1771{
1772 demand = 1;
1773 persist = 1;
1774 return 1;
1775}
1776
1777static int
1778setmodem(argv)
1779 char **argv;
1780{
1781 modem = 1;
1782 return 1;
1783}
1784
1785static int
1786setmodem_chat(argv)
1787 char **argv;
1788{
1789 modem_chat = 1;
1790 return 1;
1791}
1792
1793static int
1794setlocal(argv)
1795 char **argv;
1796{
1797 modem = 0;
1798 return 1;
1799}
1800
1801static int
1802setlock(argv)
1803 char **argv;
1804{
1805 lockflag = 1;
1806 return 1;
1807}
1808
1809static int
1810setusehostname(argv)
1811 char **argv;
1812{
1813 usehostname = 1;
1814 return 1;
1815}
1816
1817static int
1818setname(argv)
1819 char **argv;
1820{
1821 if (!privileged_option) {
1822 option_error("using the name option requires root privilege");
1823 return 0;
1824 }
1825 strlcpy(our_name, argv[0], MAXNAMELEN256);
1826 return 1;
1827}
1828
1829static int
1830setuser(argv)
1831 char **argv;
1832{
1833 strlcpy(user, argv[0], MAXNAMELEN256);
1834 return 1;
1835}
1836
1837static int
1838setremote(argv)
1839 char **argv;
1840{
1841 strlcpy(remote_name, argv[0], MAXNAMELEN256);
1842 return 1;
1843}
1844
1845static int
1846setauth(argv)
1847 char **argv;
1848{
1849 auth_required = 1;
1850 if (privileged_option > auth_req_info.priv) {
1851 auth_req_info.priv = privileged_option;
1852 auth_req_info.source = option_source;
1853 }
1854 return 1;
1855}
1856
1857static int
1858setnoauth(argv)
1859 char **argv;
1860{
1861 if (auth_required && privileged_option < auth_req_info.priv) {
1862 if (auth_req_info.source == NULL((void *)0))
1863 option_error("cannot override default auth option");
1864 else
1865 option_error("cannot override auth option set by %s",
1866 auth_req_info.source);
1867 return 0;
1868 }
1869 auth_required = 0;
1870 return 1;
1871}
1872
1873static int
1874setdefaultroute(argv)
1875 char **argv;
1876{
1877 if (!ipcp_allowoptions[0].default_route) {
1878 option_error("defaultroute option is disabled");
1879 return 0;
1880 }
1881 ipcp_wantoptions[0].default_route = 1;
1882 return 1;
1883}
1884
1885static int
1886setnodefaultroute(argv)
1887 char **argv;
1888{
1889 ipcp_allowoptions[0].default_route = 0;
1890 ipcp_wantoptions[0].default_route = 0;
1891 return 1;
1892}
1893
1894static int
1895setproxyarp(argv)
1896 char **argv;
1897{
1898 if (!ipcp_allowoptions[0].proxy_arp) {
1899 option_error("proxyarp option is disabled");
1900 return 0;
1901 }
1902 ipcp_wantoptions[0].proxy_arp = 1;
1903 return 1;
1904}
1905
1906static int
1907setnoproxyarp(argv)
1908 char **argv;
1909{
1910 ipcp_wantoptions[0].proxy_arp = 0;
1911 ipcp_allowoptions[0].proxy_arp = 0;
1912 return 1;
1913}
1914
1915static int
1916setpersist(argv)
1917 char **argv;
1918{
1919 persist = 1;
1920 return 1;
1921}
1922
1923static int
1924setnopersist(argv)
1925 char **argv;
1926{
1927 persist = 0;
1928 return 1;
1929}
1930
1931static int
1932setdologin(argv)
1933 char **argv;
1934{
1935 uselogin = 1;
1936 return 1;
1937}
1938
1939/*
1940 * Functions to set the echo interval for modem-less monitors
1941 */
1942
1943static int
1944setlcpechointv(argv)
1945 char **argv;
1946{
1947 return int_option(*argv, &lcp_echo_interval);
1948}
1949
1950static int
1951setlcpechofails(argv)
1952 char **argv;
1953{
1954 return int_option(*argv, &lcp_echo_fails);
1955}
1956
1957/*
1958 * Functions to set timeouts, max transmits, etc.
1959 */
1960static int
1961setlcptimeout(argv)
1962 char **argv;
1963{
1964 return int_option(*argv, &lcp_fsm[0].timeouttime);
1965}
1966
1967static int
1968setlcpterm(argv)
1969 char **argv;
1970{
1971 return int_option(*argv, &lcp_fsm[0].maxtermtransmits);
1972}
1973
1974static int
1975setlcpconf(argv)
1976 char **argv;
1977{
1978 return int_option(*argv, &lcp_fsm[0].maxconfreqtransmits);
1979}
1980
1981static int
1982setlcpfails(argv)
1983 char **argv;
1984{
1985 return int_option(*argv, &lcp_fsm[0].maxnakloops);
1986}
1987
1988static int
1989setipcptimeout(argv)
1990 char **argv;
1991{
1992 return int_option(*argv, &ipcp_fsm[0].timeouttime);
1993}
1994
1995static int
1996setipcpterm(argv)
1997 char **argv;
1998{
1999 return int_option(*argv, &ipcp_fsm[0].maxtermtransmits);
2000}
2001
2002static int
2003setipcpconf(argv)
2004 char **argv;
2005{
2006 return int_option(*argv, &ipcp_fsm[0].maxconfreqtransmits);
2007}
2008
2009static int
2010setipcpfails(argv)
2011 char **argv;
2012{
2013 return int_option(*argv, &lcp_fsm[0].maxnakloops);
2014}
2015
2016static int
2017setpaptimeout(argv)
2018 char **argv;
2019{
2020 return int_option(*argv, &upap[0].us_timeouttime);
2021}
2022
2023static int
2024setpapreqtime(argv)
2025 char **argv;
2026{
2027 return int_option(*argv, &upap[0].us_reqtimeout);
2028}
2029
2030static int
2031setpapreqs(argv)
2032 char **argv;
2033{
2034 return int_option(*argv, &upap[0].us_maxtransmits);
2035}
2036
2037static int
2038setchaptimeout(argv)
2039 char **argv;
2040{
2041 return int_option(*argv, &chap[0].timeouttime);
2042}
2043
2044static int
2045setchapchal(argv)
2046 char **argv;
2047{
2048 return int_option(*argv, &chap[0].max_transmits);
2049}
2050
2051static int
2052setchapintv(argv)
2053 char **argv;
2054{
2055 return int_option(*argv, &chap[0].chal_interval);
2056}
2057
2058static int
2059noccp(argv)
2060 char **argv;
2061{
2062 ccp_protent.enabled_flag = 0;
2063 return 1;
2064}
2065
2066static int
2067setbsdcomp(argv)
2068 char **argv;
2069{
2070 int rbits, abits;
2071 char *str, *endp;
2072
2073 str = *argv;
2074 abits = rbits = strtol(str, &endp, 0);
2075 if (endp != str && *endp == ',') {
2076 str = endp + 1;
2077 abits = strtol(str, &endp, 0);
2078 }
2079 if (*endp != 0 || endp == str) {
2080 option_error("invalid parameter '%s' for bsdcomp option", *argv);
2081 return 0;
2082 }
2083 if ((rbits != 0 && (rbits < BSD_MIN_BITS9 || rbits > BSD_MAX_BITS15))
2084 || (abits != 0 && (abits < BSD_MIN_BITS9 || abits > BSD_MAX_BITS15))) {
2085 option_error("bsdcomp option values must be 0 or %d .. %d",
2086 BSD_MIN_BITS9, BSD_MAX_BITS15);
2087 return 0;
2088 }
2089 if (rbits > 0) {
2090 ccp_wantoptions[0].bsd_compress = 1;
2091 ccp_wantoptions[0].bsd_bits = rbits;
2092 } else
2093 ccp_wantoptions[0].bsd_compress = 0;
2094 if (abits > 0) {
2095 ccp_allowoptions[0].bsd_compress = 1;
2096 ccp_allowoptions[0].bsd_bits = abits;
2097 } else
2098 ccp_allowoptions[0].bsd_compress = 0;
2099 return 1;
2100}
2101
2102static int
2103setnobsdcomp(argv)
2104 char **argv;
2105{
2106 ccp_wantoptions[0].bsd_compress = 0;
2107 ccp_allowoptions[0].bsd_compress = 0;
2108 return 1;
2109}
2110
2111static int
2112setdeflate(argv)
2113 char **argv;
2114{
2115 int rbits, abits;
2116 char *str, *endp;
2117
2118 str = *argv;
2119 abits = rbits = strtol(str, &endp, 0);
2120 if (endp != str && *endp == ',') {
2121 str = endp + 1;
2122 abits = strtol(str, &endp, 0);
2123 }
2124 if (*endp != 0 || endp == str) {
2125 option_error("invalid parameter '%s' for deflate option", *argv);
2126 return 0;
2127 }
2128 if ((rbits != 0 && (rbits < DEFLATE_MIN_SIZE8 || rbits > DEFLATE_MAX_SIZE15))
2129 || (abits != 0 && (abits < DEFLATE_MIN_SIZE8
2130 || abits > DEFLATE_MAX_SIZE15))) {
2131 option_error("deflate option values must be 0 or %d .. %d",
2132 DEFLATE_MIN_SIZE8, DEFLATE_MAX_SIZE15);
2133 return 0;
2134 }
2135 if (rbits > 0) {
2136 ccp_wantoptions[0].deflate = 1;
2137 ccp_wantoptions[0].deflate_size = rbits;
2138 } else
2139 ccp_wantoptions[0].deflate = 0;
2140 if (abits > 0) {
2141 ccp_allowoptions[0].deflate = 1;
2142 ccp_allowoptions[0].deflate_size = abits;
2143 } else
2144 ccp_allowoptions[0].deflate = 0;
2145 return 1;
2146}
2147
2148static int
2149setnodeflate(argv)
2150 char **argv;
2151{
2152 ccp_wantoptions[0].deflate = 0;
2153 ccp_allowoptions[0].deflate = 0;
2154 return 1;
2155}
2156
2157static int
2158setnodeflatedraft(argv)
2159 char **argv;
2160{
2161 ccp_wantoptions[0].deflate_draft = 0;
2162 ccp_allowoptions[0].deflate_draft = 0;
2163 return 1;
2164}
2165
2166static int
2167setpred1comp(argv)
2168 char **argv;
2169{
2170 ccp_wantoptions[0].predictor_1 = 1;
2171 ccp_allowoptions[0].predictor_1 = 1;
2172 return 1;
2173}
2174
2175static int
2176setnopred1comp(argv)
2177 char **argv;
2178{
2179 ccp_wantoptions[0].predictor_1 = 0;
2180 ccp_allowoptions[0].predictor_1 = 0;
2181 return 1;
2182}
2183
2184static int
2185setipparam(argv)
2186 char **argv;
2187{
2188 ipparam = strdup(*argv);
2189 if (ipparam == NULL((void *)0))
2190 novm("ipparam string");
2191
2192 return 1;
2193}
2194
2195static int
2196setpapcrypt(argv)
2197 char **argv;
2198{
2199 cryptpap = 1;
2200 return 1;
2201}
2202
2203static int
2204setidle(argv)
2205 char **argv;
2206{
2207 return int_option(*argv, &idle_time_limit);
2208}
2209
2210static int
2211setholdoff(argv)
2212 char **argv;
2213{
2214 return int_option(*argv, &holdoff);
2215}
2216
2217/*
2218 * setdnsaddr - set the dns address(es)
2219 */
2220static int
2221setdnsaddr(argv)
2222 char **argv;
2223{
2224 struct in_addr ina;
2225 struct hostent *hp;
2226
2227 if (inet_aton(*argv, &ina) == 0) {
2228 if ((hp = gethostbyname(*argv)) == NULL((void *)0)) {
2229 option_error("invalid address parameter '%s' for ms-dns option",
2230 *argv);
2231 return (0);
2232 }
2233 ina.s_addr = *(u_int32_t *)hp->h_addrh_addr_list[0];
2234 }
2235
2236 /* if there is no primary then update it. */
2237 if (ipcp_allowoptions[0].dnsaddr[0] == 0)
2238 ipcp_allowoptions[0].dnsaddr[0] = ina.s_addr;
2239
2240 /* always set the secondary address value to the same value. */
2241 ipcp_allowoptions[0].dnsaddr[1] = ina.s_addr;
2242
2243 return (1);
2244}
2245
2246/*
2247 * setwinsaddr - set the wins address(es)
2248 * This is primrarly used with the Samba package under UNIX or for pointing
2249 * the caller to the existing WINS server on a Windows NT platform.
2250 */
2251static int
2252setwinsaddr(argv)
2253 char **argv;
2254{
2255 struct in_addr ina;
2256 struct hostent *hp;
2257
2258 if (inet_aton(*argv, &ina) == 0) {
2259 if ((hp = gethostbyname(*argv)) == NULL((void *)0)) {
2260 option_error("invalid address parameter '%s' for ms-wins option",
2261 *argv);
2262 return (0);
2263 }
2264 ina.s_addr = *(u_int32_t *)hp->h_addrh_addr_list[0];
2265 }
2266
2267 /* if there is no primary then update it. */
2268 if (ipcp_allowoptions[0].winsaddr[0] == 0)
2269 ipcp_allowoptions[0].winsaddr[0] = ina.s_addr;
2270
2271 /* always set the secondary address value to the same value. */
2272 ipcp_allowoptions[0].winsaddr[1] = ina.s_addr;
2273
2274 return (1);
2275}
2276
2277#ifdef MSLANMAN
2278static int
2279setmslanman(argv)
2280 char **argv;
2281{
2282 ms_lanman = 1;
2283 return (1);
2284}
2285#endif