1/* 2 * main.c - Point-to-Point Protocol main module 3 * 4 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * 3. The name "Carnegie Mellon University" must not be used to 19 * endorse or promote products derived from this software without 20 * prior written permission. For permission or any legal 21 * details, please contact 22 * Office of Technology Transfer 23 * Carnegie Mellon University 24 * 5000 Forbes Avenue 25 * Pittsburgh, PA 15213-3890 26 * (412) 268-4387, fax: (412) 268-7395 27 * tech-transfer@andrew.cmu.edu 28 * 29 * 4. Redistributions of any form whatsoever must retain the following 30 * acknowledgment: 31 * "This product includes software developed by Computing Services 32 * at Carnegie Mellon University (http://www.cmu.edu/computing/)." 33 * 34 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO 35 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 36 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE 37 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 38 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 39 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 40 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 41 * 42 * Copyright (c) 1999-2004 Paul Mackerras. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 51 * 2. The name(s) of the authors of this software must not be used to 52 * endorse or promote products derived from this software without 53 * prior written permission. 54 * 55 * 3. Redistributions of any form whatsoever must retain the following 56 * acknowledgment: 57 * "This product includes software developed by Paul Mackerras 58 * <paulus@samba.org>". 59 * 60 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO 61 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 62 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY 63 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 64 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 65 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 66 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 67 */ 68 69#define RCSID "$Id: main.c,v 1.156 2008/06/23 11:47:18 paulus Exp $" 70 71#include <stdio.h> 72#include <ctype.h> 73#include <stdlib.h> 74#include <string.h> 75#include <unistd.h> 76#include <signal.h> 77#include <errno.h> 78#include <fcntl.h> 79#include <syslog.h> 80#include <netdb.h> 81#include <utmp.h> 82#include <pwd.h> 83#include <setjmp.h> 84#include <sys/param.h> 85#include <sys/types.h> 86#include <sys/wait.h> 87#include <sys/time.h> 88#include <sys/resource.h> 89#include <sys/stat.h> 90#include <sys/socket.h> 91#include <netinet/in.h> 92#include <arpa/inet.h> 93#include <sys/sysinfo.h> 94 95#include "pppd.h" 96#include "magic.h" 97#include "fsm.h" 98#include "lcp.h" 99#include "ipcp.h" 100#ifdef INET6 101#include "ipv6cp.h" 102#endif 103#include "upap.h" 104#include "chap-new.h" 105#include "eap.h" 106#include "ccp.h" 107#include "ecp.h" 108#include "pathnames.h" 109 110#ifdef USE_TDB 111#include "tdb.h" 112#endif 113 114#ifdef CBCP_SUPPORT 115#include "cbcp.h" 116#endif 117 118#ifdef IPX_CHANGE 119#include "ipxcp.h" 120#endif /* IPX_CHANGE */ 121#ifdef AT_CHANGE 122#include "atcp.h" 123#endif 124 125static const char rcsid[] = RCSID; 126 127/* interface vars */ 128char ifname[32]; /* Interface name */ 129int ifunit; /* Interface unit number */ 130 131struct channel *the_channel; 132 133char *progname; /* Name of this program */ 134char hostname[MAXNAMELEN]; /* Our hostname */ 135static char pidfilename[MAXPATHLEN]; /* name of pid file */ 136static char linkpidfile[MAXPATHLEN]; /* name of linkname pid file */ 137char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */ 138uid_t uid; /* Our real user-id */ 139struct notifier *pidchange = NULL; 140struct notifier *phasechange = NULL; 141struct notifier *exitnotify = NULL; 142struct notifier *sigreceived = NULL; 143struct notifier *fork_notifier = NULL; 144 145int hungup; /* terminal has been hung up */ 146int privileged; /* we're running as real uid root */ 147int need_holdoff; /* need holdoff period before restarting */ 148int detached; /* have detached from terminal */ 149volatile int status; /* exit status for pppd */ 150int unsuccess; /* # unsuccessful connection attempts */ 151int do_callback; /* != 0 if we should do callback next */ 152int doing_callback; /* != 0 if we are doing callback */ 153int ppp_session_number; /* Session number, for channels with such a 154 concept (eg PPPoE) */ 155int childwait_done; /* have timed out waiting for children */ 156 157#ifdef USE_TDB 158TDB_CONTEXT *pppdb; /* database for storing status etc. */ 159#endif 160 161char db_key[32]; 162 163int (*holdoff_hook) __P((void)) = NULL; 164int (*new_phase_hook) __P((int)) = NULL; 165void (*snoop_recv_hook) __P((unsigned char *p, int len)) = NULL; 166void (*snoop_send_hook) __P((unsigned char *p, int len)) = NULL; 167 168static int conn_running; /* we have a [dis]connector running */ 169static int fd_loop; /* fd for getting demand-dial packets */ 170 171int fd_devnull; /* fd for /dev/null */ 172int devfd = -1; /* fd of underlying device */ 173int fd_ppp = -1; /* fd for talking PPP */ 174int phase; /* where the link is at */ 175int kill_link; 176int asked_to_quit; 177int open_ccp_flag; 178int listen_time; 179int got_sigusr2; 180int got_sigterm; 181int got_sighup; 182 183static sigset_t signals_handled; 184static int waiting; 185static sigjmp_buf sigjmp; 186 187char **script_env; /* Env. variable values for scripts */ 188int s_env_nalloc; /* # words avail at script_env */ 189 190u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */ 191u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */ 192 193static int n_children; /* # child processes still running */ 194static int got_sigchld; /* set if we have received a SIGCHLD */ 195 196int privopen; /* don't lock, open device as root */ 197 198char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n"; 199 200GIDSET_TYPE groups[NGROUPS_MAX];/* groups the user is in */ 201int ngroups; /* How many groups valid in groups */ 202 203static struct timeval start_time; /* Time when link was started. */ 204 205static struct pppd_stats old_link_stats; 206struct pppd_stats link_stats; 207unsigned link_connect_time; 208int link_stats_valid; 209 210int error_count; 211 212bool bundle_eof; 213bool bundle_terminating; 214 215/* 216 * We maintain a list of child process pids and 217 * functions to call when they exit. 218 */ 219struct subprocess { 220 pid_t pid; 221 char *prog; 222 void (*done) __P((void *)); 223 void *arg; 224 int killable; 225 struct subprocess *next; 226}; 227 228static struct subprocess *children; 229 230/* Prototypes for procedures local to this file. */ 231 232static void check_time(void); 233static void setup_signals __P((void)); 234static void create_pidfile __P((int pid)); 235static void create_linkpidfile __P((int pid)); 236static void cleanup __P((void)); 237static void get_input __P((void)); 238static void calltimeout __P((void)); 239static struct timeval *timeleft __P((struct timeval *)); 240static void kill_my_pg __P((int)); 241static void hup __P((int)); 242static void term __P((int)); 243static void chld __P((int)); 244static void toggle_debug __P((int)); 245static void open_ccp __P((int)); 246static void bad_signal __P((int)); 247static void holdoff_end __P((void *)); 248static void forget_child __P((int pid, int status)); 249static int reap_kids __P((void)); 250static void childwait_end __P((void *)); 251 252#ifdef USE_TDB 253static void update_db_entry __P((void)); 254static void add_db_key __P((const char *)); 255static void delete_db_key __P((const char *)); 256static void cleanup_db __P((void)); 257#endif 258 259static void handle_events __P((void)); 260void print_link_stats __P((void)); 261 262extern char *ttyname __P((int)); 263extern char *getlogin __P((void)); 264int main __P((int, char *[])); 265 266#ifdef ultrix 267#undef O_NONBLOCK 268#define O_NONBLOCK O_NDELAY 269#endif 270 271#ifdef ULTRIX 272#define setlogmask(x) 273#endif 274 275/* 276 * PPP Data Link Layer "protocol" table. 277 * One entry per supported protocol. 278 * The last entry must be NULL. 279 */ 280struct protent *protocols[] = { 281 &lcp_protent, 282 &pap_protent, 283 &chap_protent, 284#ifdef CBCP_SUPPORT 285 &cbcp_protent, 286#endif 287 &ipcp_protent, 288#ifdef INET6 289 &ipv6cp_protent, 290#endif 291 &ccp_protent, 292 &ecp_protent, 293#ifdef IPX_CHANGE 294 &ipxcp_protent, 295#endif 296#ifdef AT_CHANGE 297 &atcp_protent, 298#endif 299 &eap_protent, 300 NULL 301}; 302 303/* 304 * If PPP_DRV_NAME is not defined, use the default "ppp" as the device name. 305 */ 306#if !defined(PPP_DRV_NAME) 307#define PPP_DRV_NAME "ppp" 308#endif /* !defined(PPP_DRV_NAME) */ 309 310int 311main(argc, argv) 312 int argc; 313 char *argv[]; 314{ 315 int i, t; 316 char *p; 317 struct passwd *pw; 318 struct protent *protp; 319 char numbuf[16]; 320 321 link_stats_valid = 0; 322 new_phase(PHASE_INITIALIZE); 323 324 script_env = NULL; 325 326 /* Initialize syslog facilities */ 327 reopen_log(); 328 329 if (gethostname(hostname, MAXNAMELEN) < 0 ) { 330 option_error("Couldn't get hostname: %m"); 331 exit(1); 332 } 333 hostname[MAXNAMELEN-1] = 0; 334 335 /* make sure we don't create world or group writable files. */ 336 umask(umask(0777) | 022); 337 338 uid = getuid(); 339 privileged = uid == 0; 340 slprintf(numbuf, sizeof(numbuf), "%d", uid); 341 script_setenv("ORIG_UID", numbuf, 0); 342 343 ngroups = getgroups(NGROUPS_MAX, groups); 344 345 /* 346 * Initialize magic number generator now so that protocols may 347 * use magic numbers in initialization. 348 */ 349 magic_init(); 350 351 /* 352 * Initialize each protocol. 353 */ 354 for (i = 0; (protp = protocols[i]) != NULL; ++i) 355 (*protp->init)(0); 356 357 /* 358 * Initialize the default channel. 359 */ 360 tty_init(); 361 362 progname = *argv; 363 364 /* 365 * Parse, in order, the system options file, the user's options file, 366 * and the command line arguments. 367 */ 368 if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1) 369 || !options_from_user() 370 || !parse_args(argc-1, argv+1)) 371 exit(EXIT_OPTION_ERROR); 372 devnam_fixed = 1; /* can no longer change device name */ 373 374 /* 375 * Work out the device name, if it hasn't already been specified, 376 * and parse the tty's options file. 377 */ 378 if (the_channel->process_extra_options) 379 (*the_channel->process_extra_options)(); 380 381 if (debug) 382 setlogmask(LOG_UPTO(LOG_DEBUG)); 383 384 /* 385 * Check that we are running as root. 386 */ 387 if (geteuid() != 0) { 388 option_error("must be root to run %s, since it is not setuid-root", 389 argv[0]); 390 exit(EXIT_NOT_ROOT); 391 } 392 393 if (!ppp_available()) { 394 option_error("%s", no_ppp_msg); 395 exit(EXIT_NO_KERNEL_SUPPORT); 396 } 397 398 /* 399 * Check that the options given are valid and consistent. 400 */ 401 check_options(); 402 if (!sys_check_options()) 403 exit(EXIT_OPTION_ERROR); 404 auth_check_options(); 405#ifdef HAVE_MULTILINK 406 mp_check_options(); 407#endif 408 for (i = 0; (protp = protocols[i]) != NULL; ++i) 409 if (protp->check_options != NULL) 410 (*protp->check_options)(); 411 if (the_channel->check_options) 412 (*the_channel->check_options)(); 413 414 415 if (dump_options || dryrun) { 416 init_pr_log(NULL, LOG_INFO); 417 print_options(pr_log, NULL); 418 end_pr_log(); 419 } 420 421 if (dryrun) 422 die(0); 423 424 /* Make sure fds 0, 1, 2 are open to somewhere. */ 425 fd_devnull = open(_PATH_DEVNULL, O_RDWR); 426 if (fd_devnull < 0) 427 fatal("Couldn't open %s: %m", _PATH_DEVNULL); 428 while (fd_devnull <= 2) { 429 i = dup(fd_devnull); 430 if (i < 0) 431 fatal("Critical shortage of file descriptors: dup failed: %m"); 432 fd_devnull = i; 433 } 434 435 /* 436 * pppd sends signals to the whole process group, so it must always 437 * create a new one or it may kill the parent process and its siblings. 438 */ 439 setsid(); 440 chdir("/"); 441 442 /* 443 * Initialize system-dependent stuff. 444 */ 445 sys_init(); 446 447#ifdef USE_TDB 448 pppdb = tdb_open(_PATH_PPPDB, 0, 0, O_RDWR|O_CREAT, 0644); 449 if (pppdb != NULL) { 450 slprintf(db_key, sizeof(db_key), "pppd%d", getpid()); 451 update_db_entry(); 452 } else { 453 warn("Warning: couldn't open ppp database %s", _PATH_PPPDB); 454 if (multilink) { 455 warn("Warning: disabling multilink"); 456 multilink = 0; 457 } 458 } 459#endif 460 461 /* 462 * Detach ourselves from the terminal, if required, 463 * and identify who is running us. 464 */ 465 if (!nodetach && !updetach) 466 detach(); 467 p = getlogin(); 468 if (p == NULL) { 469 pw = getpwuid(uid); 470 if (pw != NULL && pw->pw_name != NULL) 471 p = pw->pw_name; 472 else 473 p = "(unknown)"; 474 } 475 syslog(LOG_NOTICE, "pppd %s started by %s, uid %d", VERSION, p, uid); 476 script_setenv("PPPLOGNAME", p, 0); 477 478 if (devnam[0]) 479 script_setenv("DEVICE", devnam, 1); 480 slprintf(numbuf, sizeof(numbuf), "%d", getpid()); 481 script_setenv("PPPD_PID", numbuf, 1); 482 483 setup_signals(); 484 485 create_linkpidfile(getpid()); 486 487 waiting = 0; 488 489 /* 490 * If we're doing dial-on-demand, set up the interface now. 491 */ 492 if (demand) { 493 /* 494 * Open the loopback channel and set it up to be the ppp interface. 495 */ 496 fd_loop = open_ppp_loopback(); 497 set_ifunit(1); 498 /* 499 * Configure the interface and mark it up, etc. 500 */ 501 demand_conf(); 502 } 503 504 do_callback = 0; 505 for (;;) { 506 507 bundle_eof = 0; 508 bundle_terminating = 0; 509 listen_time = 0; 510 need_holdoff = 1; 511 devfd = -1; 512 status = EXIT_OK; 513 ++unsuccess; 514 doing_callback = do_callback; 515 do_callback = 0; 516 517 if (demand && !doing_callback) { 518 /* 519 * Don't do anything until we see some activity. 520 */ 521 new_phase(PHASE_DORMANT); 522 demand_unblock(); 523 add_fd(fd_loop); 524 for (;;) { 525 handle_events(); 526 if (asked_to_quit) 527 break; 528 if (get_loop_output()) 529 break; 530 } 531 remove_fd(fd_loop); 532 if (asked_to_quit) 533 break; 534 535 /* 536 * Now we want to bring up the link. 537 */ 538 demand_block(); 539 info("Starting link"); 540 } 541 542 check_time(); 543 gettimeofday(&start_time, NULL); 544 script_unsetenv("CONNECT_TIME"); 545 script_unsetenv("BYTES_SENT"); 546 script_unsetenv("BYTES_RCVD"); 547 548 lcp_open(0); /* Start protocol */ 549 start_link(0); 550 while (phase != PHASE_DEAD) { 551 handle_events(); 552 get_input(); 553 if (kill_link) 554 lcp_close(0, "User request"); 555 if (asked_to_quit) { 556 bundle_terminating = 1; 557 if (phase == PHASE_MASTER) 558 mp_bundle_terminated(); 559 } 560 if (open_ccp_flag) { 561 if (phase == PHASE_NETWORK || phase == PHASE_RUNNING) { 562 ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */ 563 (*ccp_protent.open)(0); 564 } 565 } 566 } 567 /* restore FSMs to original state */ 568 lcp_close(0, ""); 569 570 if (!persist || asked_to_quit || (maxfail > 0 && unsuccess >= maxfail)) 571 break; 572 573 if (demand) 574 demand_discard(); 575 t = need_holdoff? holdoff: 0; 576 if (holdoff_hook) 577 t = (*holdoff_hook)(); 578 if (t > 0) { 579 new_phase(PHASE_HOLDOFF); 580 TIMEOUT(holdoff_end, NULL, t); 581 do { 582 handle_events(); 583 if (kill_link) 584 new_phase(PHASE_DORMANT); /* allow signal to end holdoff */ 585 } while (phase == PHASE_HOLDOFF); 586 if (!persist) 587 break; 588 } 589 } 590 591 /* Wait for scripts to finish */ 592 reap_kids(); 593 if (n_children > 0) { 594 if (child_wait > 0) 595 TIMEOUT(childwait_end, NULL, child_wait); 596 if (debug) { 597 struct subprocess *chp; 598 dbglog("Waiting for %d child processes...", n_children); 599 for (chp = children; chp != NULL; chp = chp->next) 600 dbglog(" script %s, pid %d", chp->prog, chp->pid); 601 } 602 while (n_children > 0 && !childwait_done) { 603 handle_events(); 604 if (kill_link && !childwait_done) 605 childwait_end(NULL); 606 } 607 } 608 609 die(status); 610 return 0; 611} 612 613/* 614 * handle_events - wait for something to happen and respond to it. 615 */ 616static void 617handle_events() 618{ 619 struct timeval timo; 620 621 kill_link = open_ccp_flag = 0; 622 if (sigsetjmp(sigjmp, 1) == 0) { 623 sigprocmask(SIG_BLOCK, &signals_handled, NULL); 624 if (got_sighup || got_sigterm || got_sigusr2 || got_sigchld) { 625 sigprocmask(SIG_UNBLOCK, &signals_handled, NULL); 626 } else { 627 waiting = 1; 628 sigprocmask(SIG_UNBLOCK, &signals_handled, NULL); 629 wait_input(timeleft(&timo)); 630 } 631 } 632 waiting = 0; 633 calltimeout(); 634 if (got_sighup) { 635 info("Hangup (SIGHUP)"); 636 kill_link = 1; 637 got_sighup = 0; 638 if (status != EXIT_HANGUP) 639 status = EXIT_USER_REQUEST; 640 } 641 if (got_sigterm) { 642 info("Terminating on signal %d", got_sigterm); 643 kill_link = 1; 644 asked_to_quit = 1; 645 persist = 0; 646 status = EXIT_USER_REQUEST; 647 got_sigterm = 0; 648 } 649 if (got_sigchld) { 650 got_sigchld = 0; 651 reap_kids(); /* Don't leave dead kids lying around */ 652 } 653 if (got_sigusr2) { 654 open_ccp_flag = 1; 655 got_sigusr2 = 0; 656 } 657} 658 659/* 660 * setup_signals - initialize signal handling. 661 */ 662static void 663setup_signals() 664{ 665 struct sigaction sa; 666 667 /* 668 * Compute mask of all interesting signals and install signal handlers 669 * for each. Only one signal handler may be active at a time. Therefore, 670 * all other signals should be masked when any handler is executing. 671 */ 672 sigemptyset(&signals_handled); 673 sigaddset(&signals_handled, SIGHUP); 674 sigaddset(&signals_handled, SIGINT); 675 sigaddset(&signals_handled, SIGTERM); 676 sigaddset(&signals_handled, SIGCHLD); 677 sigaddset(&signals_handled, SIGUSR2); 678 679#define SIGNAL(s, handler) do { \ 680 sa.sa_handler = handler; \ 681 if (sigaction(s, &sa, NULL) < 0) \ 682 fatal("Couldn't establish signal handler (%d): %m", s); \ 683 } while (0) 684 685 sa.sa_mask = signals_handled; 686 sa.sa_flags = 0; 687 SIGNAL(SIGHUP, hup); /* Hangup */ 688 SIGNAL(SIGINT, term); /* Interrupt */ 689 SIGNAL(SIGTERM, term); /* Terminate */ 690 SIGNAL(SIGCHLD, chld); 691 692 SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */ 693 SIGNAL(SIGUSR2, open_ccp); /* Reopen CCP */ 694 695 /* 696 * Install a handler for other signals which would otherwise 697 * cause pppd to exit without cleaning up. 698 */ 699 SIGNAL(SIGABRT, bad_signal); 700 SIGNAL(SIGALRM, bad_signal); 701 SIGNAL(SIGFPE, bad_signal); 702 SIGNAL(SIGILL, bad_signal); 703 SIGNAL(SIGPIPE, bad_signal); 704 SIGNAL(SIGQUIT, bad_signal); 705 SIGNAL(SIGSEGV, bad_signal); 706#ifdef SIGBUS 707 SIGNAL(SIGBUS, bad_signal); 708#endif 709#ifdef SIGEMT 710 SIGNAL(SIGEMT, bad_signal); 711#endif 712#ifdef SIGPOLL 713 SIGNAL(SIGPOLL, bad_signal); 714#endif 715#ifdef SIGPROF 716 SIGNAL(SIGPROF, bad_signal); 717#endif 718#ifdef SIGSYS 719 SIGNAL(SIGSYS, bad_signal); 720#endif 721#ifdef SIGTRAP 722 SIGNAL(SIGTRAP, bad_signal); 723#endif 724#ifdef SIGVTALRM 725 SIGNAL(SIGVTALRM, bad_signal); 726#endif 727#ifdef SIGXCPU 728 SIGNAL(SIGXCPU, bad_signal); 729#endif 730#ifdef SIGXFSZ 731 SIGNAL(SIGXFSZ, bad_signal); 732#endif 733 734 /* 735 * Apparently we can get a SIGPIPE when we call syslog, if 736 * syslogd has died and been restarted. Ignoring it seems 737 * be sufficient. 738 */ 739 signal(SIGPIPE, SIG_IGN); 740} 741 742/* 743 * set_ifunit - do things we need to do once we know which ppp 744 * unit we are using. 745 */ 746void 747set_ifunit(iskey) 748 int iskey; 749{ 750 slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit); 751 script_setenv("IFUNIT", ifname, iskey); 752 if (req_ifname[0]) 753 sifname(ifunit, req_ifname); 754 info("Using interface %s", ifname); 755 script_setenv("IFNAME", ifname, 0); 756 if (iskey) { 757 create_pidfile(getpid()); /* write pid to file */ 758 create_linkpidfile(getpid()); 759 } 760} 761 762/* 763 * detach - detach us from the controlling terminal. 764 */ 765void 766detach() 767{ 768 int pid; 769 char numbuf[16]; 770 int pipefd[2]; 771 772 if (detached) 773 return; 774 if (pipe(pipefd) == -1) 775 pipefd[0] = pipefd[1] = -1; 776 if ((pid = fork()) < 0) { 777 error("Couldn't detach (fork failed: %m)"); 778 die(1); /* or just return? */ 779 } 780 if (pid != 0) { 781 /* parent */ 782 notify(pidchange, pid); 783 /* update pid files if they have been written already */ 784 if (pidfilename[0]) 785 create_pidfile(pid); 786 if (linkpidfile[0]) 787 create_linkpidfile(pid); 788 exit(0); /* parent dies */ 789 } 790 dup2(fd_devnull, 0); 791 dup2(fd_devnull, 1); 792 dup2(fd_devnull, 2); 793 detached = 1; 794 if (log_default) 795 log_to_fd = -1; 796 slprintf(numbuf, sizeof(numbuf), "%d", getpid()); 797 script_setenv("PPPD_PID", numbuf, 1); 798 799 /* wait for parent to finish updating pid & lock files and die */ 800 close(pipefd[1]); 801 complete_read(pipefd[0], numbuf, 1); 802 close(pipefd[0]); 803} 804 805/* 806 * reopen_log - (re)open our connection to syslog. 807 */ 808void 809reopen_log() 810{ 811 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP); 812 setlogmask(LOG_UPTO(LOG_INFO)); 813} 814 815/* 816 * Create a file containing our process ID. 817 */ 818static void 819create_pidfile(pid) 820 int pid; 821{ 822 FILE *pidfile; 823 824 slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid", 825 _PATH_VARRUN, ifname); 826 if ((pidfile = fopen(pidfilename, "w")) != NULL) { 827 fprintf(pidfile, "%d\n", pid); 828 (void) fclose(pidfile); 829 } else { 830 error("Failed to create pid file %s: %m", pidfilename); 831 pidfilename[0] = 0; 832 } 833} 834 835void 836create_linkpidfile(pid) 837 int pid; 838{ 839 FILE *pidfile; 840 841 if (linkname[0] == 0) 842 return; 843 script_setenv("LINKNAME", linkname, 1); 844 slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid", 845 _PATH_VARRUN, linkname); 846 if ((pidfile = fopen(linkpidfile, "w")) != NULL) { 847 fprintf(pidfile, "%d\n", pid); 848 if (ifname[0]) 849 fprintf(pidfile, "%s\n", ifname); 850 (void) fclose(pidfile); 851 } else { 852 error("Failed to create pid file %s: %m", linkpidfile); 853 linkpidfile[0] = 0; 854 } 855} 856 857/* 858 * remove_pidfile - remove our pid files 859 */ 860void remove_pidfiles(keep_linkpid) 861 int keep_linkpid; 862{ 863 if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT) 864 warn("unable to delete pid file %s: %m", pidfilename); 865 pidfilename[0] = 0; 866 if (keep_linkpid) 867 return; 868 if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT) 869 warn("unable to delete pid file %s: %m", linkpidfile); 870 linkpidfile[0] = 0; 871} 872 873/* 874 * holdoff_end - called via a timeout when the holdoff period ends. 875 */ 876static void 877holdoff_end(arg) 878 void *arg; 879{ 880 new_phase(PHASE_DORMANT); 881} 882 883/* List of protocol names, to make our messages a little more informative. */ 884struct protocol_list { 885 u_short proto; 886 const char *name; 887} protocol_list[] = { 888 { 0x21, "IP" }, 889#if 0 890 { 0x23, "OSI Network Layer" }, 891 { 0x25, "Xerox NS IDP" }, 892 { 0x27, "DECnet Phase IV" }, 893#endif 894 { 0x29, "Appletalk" }, 895 { 0x2b, "Novell IPX" }, 896 { 0x2d, "VJ compressed TCP/IP" }, 897 { 0x2f, "VJ uncompressed TCP/IP" }, 898 { 0x31, "Bridging PDU" }, 899#if 0 900 { 0x33, "Stream Protocol ST-II" }, 901 { 0x35, "Banyan Vines" }, 902 { 0x39, "AppleTalk EDDP" }, 903 { 0x3b, "AppleTalk SmartBuffered" }, 904 { 0x3d, "Multi-Link" }, 905 { 0x3f, "NETBIOS Framing" }, 906 { 0x41, "Cisco Systems" }, 907 { 0x43, "Ascom Timeplex" }, 908 { 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" }, 909 { 0x47, "DCA Remote Lan" }, 910 { 0x49, "Serial Data Transport Protocol (PPP-SDTP)" }, 911 { 0x4b, "SNA over 802.2" }, 912 { 0x4d, "SNA" }, 913#endif 914 { 0x4f, "IP6 Header Compression" }, 915#if 0 916 { 0x51, "KNX Bridging Data" }, 917#endif 918 { 0x53, "Encryption" }, 919 { 0x55, "Individual Link Encryption" }, 920 { 0x57, "IPv6" }, 921 { 0x59, "PPP Muxing" }, 922 { 0x5b, "Vendor-Specific Network Protocol" }, 923 { 0x61, "RTP IPHC Full Header" }, 924 { 0x63, "RTP IPHC Compressed TCP" }, 925 { 0x65, "RTP IPHC Compressed non-TCP" }, 926 { 0x67, "RTP IPHC Compressed UDP 8" }, 927 { 0x69, "RTP IPHC Compressed RTP 8" }, 928#if 0 929 { 0x6f, "Stampede Bridging" }, 930 { 0x73, "MP+" }, 931 { 0xc1, "NTCITS IPI" }, 932#endif 933 { 0xfb, "single-link compression" }, 934 { 0xfd, "Compressed Datagram" }, 935 { 0x0201, "802.1d Hello Packets" }, 936#if 0 937 { 0x0203, "IBM Source Routing BPDU" }, 938 { 0x0205, "DEC LANBridge100 Spanning Tree" }, 939 { 0x0207, "Cisco Discovery Protocol" }, 940 { 0x0209, "Netcs Twin Routing" }, 941 { 0x020b, "STP - Scheduled Transfer Protocol" }, 942 { 0x020d, "EDP - Extreme Discovery Protocol" }, 943 { 0x0211, "Optical Supervisory Channel Protocol" }, 944 { 0x0213, "Optical Supervisory Channel Protocol" }, 945 { 0x0231, "Luxcom" }, 946 { 0x0233, "Sigma Network Systems" }, 947 { 0x0235, "Apple Client Server Protocol" }, 948#endif 949 { 0x0281, "MPLS Unicast" }, 950 { 0x0283, "MPLS Multicast" }, 951#if 0 952 { 0x0285, "IEEE p1284.4 standard - data packets" }, 953 { 0x0287, "ETSI TETRA Network Protocol Type 1" }, 954#endif 955 { 0x0289, "Multichannel Flow Treatment Protocol" }, 956 { 0x2063, "RTP IPHC Compressed TCP No Delta" }, 957 { 0x2065, "RTP IPHC Context State" }, 958 { 0x2067, "RTP IPHC Compressed UDP 16" }, 959 { 0x2069, "RTP IPHC Compressed RTP 16" }, 960#if 0 961 { 0x4001, "Cray Communications Control Protocol" }, 962 { 0x4003, "CDPD Mobile Network Registration Protocol" }, 963 { 0x4005, "Expand accelerator protocol" }, 964 { 0x4007, "ODSICP NCP" }, 965 { 0x4009, "DOCSIS DLL" }, 966 { 0x400B, "Cetacean Network Detection Protocol" }, 967 { 0x4021, "Stacker LZS" }, 968 { 0x4023, "RefTek Protocol" }, 969 { 0x4025, "Fibre Channel" }, 970 { 0x4027, "EMIT Protocols" }, 971#endif 972 { 0x405b, "Vendor-Specific Protocol (VSP)" }, 973 { 0x8021, "Internet Protocol Control Protocol" }, 974#if 0 975 { 0x8023, "OSI Network Layer Control Protocol" }, 976 { 0x8025, "Xerox NS IDP Control Protocol" }, 977 { 0x8027, "DECnet Phase IV Control Protocol" }, 978#endif 979 { 0x8029, "Appletalk Control Protocol" }, 980 { 0x802b, "Novell IPX Control Protocol" }, 981#if 0 982 { 0x8031, "Bridging NCP" }, 983 { 0x8033, "Stream Protocol Control Protocol" }, 984 { 0x8035, "Banyan Vines Control Protocol" }, 985#endif 986 { 0x803d, "Multi-Link Control Protocol" }, 987#if 0 988 { 0x803f, "NETBIOS Framing Control Protocol" }, 989 { 0x8041, "Cisco Systems Control Protocol" }, 990 { 0x8043, "Ascom Timeplex" }, 991 { 0x8045, "Fujitsu LBLB Control Protocol" }, 992 { 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" }, 993 { 0x8049, "Serial Data Control Protocol (PPP-SDCP)" }, 994 { 0x804b, "SNA over 802.2 Control Protocol" }, 995 { 0x804d, "SNA Control Protocol" }, 996#endif 997 { 0x804f, "IP6 Header Compression Control Protocol" }, 998#if 0 999 { 0x8051, "KNX Bridging Control Protocol" }, 1000#endif 1001 { 0x8053, "Encryption Control Protocol" }, 1002 { 0x8055, "Individual Link Encryption Control Protocol" }, 1003 { 0x8057, "IPv6 Control Protocol" }, 1004 { 0x8059, "PPP Muxing Control Protocol" }, 1005 { 0x805b, "Vendor-Specific Network Control Protocol (VSNCP)" }, 1006#if 0 1007 { 0x806f, "Stampede Bridging Control Protocol" }, 1008 { 0x8073, "MP+ Control Protocol" }, 1009 { 0x80c1, "NTCITS IPI Control Protocol" }, 1010#endif 1011 { 0x80fb, "Single Link Compression Control Protocol" }, 1012 { 0x80fd, "Compression Control Protocol" }, 1013#if 0 1014 { 0x8207, "Cisco Discovery Protocol Control" }, 1015 { 0x8209, "Netcs Twin Routing" }, 1016 { 0x820b, "STP - Control Protocol" }, 1017 { 0x820d, "EDPCP - Extreme Discovery Protocol Ctrl Prtcl" }, 1018 { 0x8235, "Apple Client Server Protocol Control" }, 1019 { 0x8281, "MPLSCP" }, 1020 { 0x8285, "IEEE p1284.4 standard - Protocol Control" }, 1021 { 0x8287, "ETSI TETRA TNP1 Control Protocol" }, 1022#endif 1023 { 0x8289, "Multichannel Flow Treatment Protocol" }, 1024 { 0xc021, "Link Control Protocol" }, 1025 { 0xc023, "Password Authentication Protocol" }, 1026 { 0xc025, "Link Quality Report" }, 1027#if 0 1028 { 0xc027, "Shiva Password Authentication Protocol" }, 1029 { 0xc029, "CallBack Control Protocol (CBCP)" }, 1030 { 0xc02b, "BACP Bandwidth Allocation Control Protocol" }, 1031 { 0xc02d, "BAP" }, 1032#endif 1033 { 0xc05b, "Vendor-Specific Authentication Protocol (VSAP)" }, 1034 { 0xc081, "Container Control Protocol" }, 1035 { 0xc223, "Challenge Handshake Authentication Protocol" }, 1036 { 0xc225, "RSA Authentication Protocol" }, 1037 { 0xc227, "Extensible Authentication Protocol" }, 1038#if 0 1039 { 0xc229, "Mitsubishi Security Info Exch Ptcl (SIEP)" }, 1040 { 0xc26f, "Stampede Bridging Authorization Protocol" }, 1041 { 0xc281, "Proprietary Authentication Protocol" }, 1042 { 0xc283, "Proprietary Authentication Protocol" }, 1043 { 0xc481, "Proprietary Node ID Authentication Protocol" }, 1044#endif 1045 { 0, NULL }, 1046}; 1047 1048/* 1049 * protocol_name - find a name for a PPP protocol. 1050 */ 1051const char * 1052protocol_name(proto) 1053 int proto; 1054{ 1055 struct protocol_list *lp; 1056 1057 for (lp = protocol_list; lp->proto != 0; ++lp) 1058 if (proto == lp->proto) 1059 return lp->name; 1060 return NULL; 1061} 1062 1063/* 1064 * get_input - called when incoming data is available. 1065 */ 1066static void 1067get_input() 1068{ 1069 int len, i; 1070 u_char *p; 1071 u_short protocol; 1072 struct protent *protp; 1073 1074 p = inpacket_buf; /* point to beginning of packet buffer */ 1075 1076 len = read_packet(inpacket_buf); 1077 if (len < 0) 1078 return; 1079 1080 if (len == 0) { 1081 if (bundle_eof && multilink_master) { 1082 notice("Last channel has disconnected"); 1083 mp_bundle_terminated(); 1084 return; 1085 } 1086 notice("Modem hangup"); 1087 hungup = 1; 1088 status = EXIT_HANGUP; 1089 lcp_lowerdown(0); /* serial link is no longer available */ 1090 link_terminated(0); 1091 return; 1092 } 1093 1094 if (len < PPP_HDRLEN) { 1095 dbglog("received short packet:%.*B", len, p); 1096 return; 1097 } 1098 1099 dump_packet("rcvd", p, len); 1100 if (snoop_recv_hook) snoop_recv_hook(p, len); 1101 1102 p += 2; /* Skip address and control */ 1103 GETSHORT(protocol, p); 1104 len -= PPP_HDRLEN; 1105 1106 /* 1107 * Toss all non-LCP packets unless LCP is OPEN. 1108 */ 1109 if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) { 1110 dbglog("Discarded non-LCP packet when LCP not open"); 1111 return; 1112 } 1113 1114 /* 1115 * Until we get past the authentication phase, toss all packets 1116 * except LCP, LQR and authentication packets. 1117 */ 1118 if (phase <= PHASE_AUTHENTICATE 1119 && !(protocol == PPP_LCP || protocol == PPP_LQR 1120 || protocol == PPP_PAP || protocol == PPP_CHAP || 1121 protocol == PPP_EAP)) { 1122 dbglog("discarding proto 0x%x in phase %d", 1123 protocol, phase); 1124 return; 1125 } 1126 1127 /* 1128 * Upcall the proper protocol input routine. 1129 */ 1130 for (i = 0; (protp = protocols[i]) != NULL; ++i) { 1131 if (protp->protocol == protocol && protp->enabled_flag) { 1132 (*protp->input)(0, p, len); 1133 return; 1134 } 1135 if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag 1136 && protp->datainput != NULL) { 1137 (*protp->datainput)(0, p, len); 1138 return; 1139 } 1140 } 1141 1142 if (debug) { 1143 const char *pname = protocol_name(protocol); 1144 if (pname != NULL) 1145 warn("Unsupported protocol '%s' (0x%x) received", pname, protocol); 1146 else 1147 warn("Unsupported protocol 0x%x received", protocol); 1148 } 1149 lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN); 1150} 1151 1152/* 1153 * ppp_send_config - configure the transmit-side characteristics of 1154 * the ppp interface. Returns -1, indicating an error, if the channel 1155 * send_config procedure called error() (or incremented error_count 1156 * itself), otherwise 0. 1157 */ 1158int 1159ppp_send_config(unit, mtu, accm, pcomp, accomp) 1160 int unit, mtu; 1161 u_int32_t accm; 1162 int pcomp, accomp; 1163{ 1164 int errs; 1165 1166 if (the_channel->send_config == NULL) 1167 return 0; 1168 errs = error_count; 1169 (*the_channel->send_config)(mtu, accm, pcomp, accomp); 1170 return (error_count != errs)? -1: 0; 1171} 1172 1173/* 1174 * ppp_recv_config - configure the receive-side characteristics of 1175 * the ppp interface. Returns -1, indicating an error, if the channel 1176 * recv_config procedure called error() (or incremented error_count 1177 * itself), otherwise 0. 1178 */ 1179int 1180ppp_recv_config(unit, mru, accm, pcomp, accomp) 1181 int unit, mru; 1182 u_int32_t accm; 1183 int pcomp, accomp; 1184{ 1185 int errs; 1186 1187 if (the_channel->recv_config == NULL) 1188 return 0; 1189 errs = error_count; 1190 (*the_channel->recv_config)(mru, accm, pcomp, accomp); 1191 return (error_count != errs)? -1: 0; 1192} 1193 1194/* 1195 * new_phase - signal the start of a new phase of pppd's operation. 1196 */ 1197void 1198new_phase(p) 1199 int p; 1200{ 1201 phase = p; 1202 if (new_phase_hook) 1203 (*new_phase_hook)(p); 1204 notify(phasechange, p); 1205} 1206 1207/* 1208 * die - clean up state and exit with the specified status. 1209 */ 1210void 1211die(status) 1212 int status; 1213{ 1214 if (!doing_multilink || multilink_master) 1215 print_link_stats(); 1216 cleanup(); 1217 notify(exitnotify, status); 1218 syslog(LOG_INFO, "Exit."); 1219 exit(status); 1220} 1221 1222/* 1223 * cleanup - restore anything which needs to be restored before we exit 1224 */ 1225/* ARGSUSED */ 1226static void 1227cleanup() 1228{ 1229 sys_cleanup(); 1230 1231 if (fd_ppp >= 0) 1232 the_channel->disestablish_ppp(devfd); 1233 if (the_channel->cleanup) 1234 (*the_channel->cleanup)(); 1235 remove_pidfiles(0); 1236 1237#ifdef USE_TDB 1238 if (pppdb != NULL) 1239 cleanup_db(); 1240#endif 1241 1242} 1243 1244void 1245print_link_stats() 1246{ 1247 /* 1248 * Print connect time and statistics. 1249 */ 1250 if (link_stats_valid) { 1251 int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */ 1252 info("Connect time %d.%d minutes.", t/10, t%10); 1253 info("Sent %u bytes, received %u bytes.", 1254 link_stats.bytes_out, link_stats.bytes_in); 1255 link_stats_valid = 0; 1256 } 1257} 1258 1259/* 1260 * reset_link_stats - "reset" stats when link goes up. 1261 */ 1262void 1263reset_link_stats(u) 1264 int u; 1265{ 1266 if (!get_ppp_stats(u, &old_link_stats)) 1267 return; 1268 gettimeofday(&start_time, NULL); 1269} 1270 1271/* 1272 * update_link_stats - get stats at link termination. 1273 */ 1274void 1275update_link_stats(u) 1276 int u; 1277{ 1278 struct timeval now; 1279 char numbuf[32]; 1280 1281 if (!get_ppp_stats(u, &link_stats) 1282 || gettimeofday(&now, NULL) < 0) 1283 return; 1284 link_connect_time = now.tv_sec - start_time.tv_sec; 1285 link_stats_valid = 1; 1286 1287 link_stats.bytes_in -= old_link_stats.bytes_in; 1288 link_stats.bytes_out -= old_link_stats.bytes_out; 1289 link_stats.pkts_in -= old_link_stats.pkts_in; 1290 link_stats.pkts_out -= old_link_stats.pkts_out; 1291 1292 slprintf(numbuf, sizeof(numbuf), "%u", link_connect_time); 1293 script_setenv("CONNECT_TIME", numbuf, 0); 1294 slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_out); 1295 script_setenv("BYTES_SENT", numbuf, 0); 1296 slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_in); 1297 script_setenv("BYTES_RCVD", numbuf, 0); 1298} 1299 1300 1301struct callout { 1302 struct timeval c_time; /* time at which to call routine */ 1303 void *c_arg; /* argument to routine */ 1304 void (*c_func) __P((void *)); /* routine */ 1305 struct callout *c_next; 1306}; 1307 1308static struct callout *callout = NULL; /* Callout list */ 1309static struct timeval timenow; /* Current time */ 1310static long uptime_diff = 0; 1311static int uptime_diff_set = 0; 1312 1313static void check_time(void) 1314{ 1315 long new_diff; 1316 struct timeval t; 1317 struct sysinfo i; 1318 struct callout *p; 1319 1320 if (nochecktime) 1321 return; 1322 1323 gettimeofday(&t, NULL); 1324 sysinfo(&i); 1325 new_diff = t.tv_sec - i.uptime; 1326 1327 if (!uptime_diff_set) { 1328 uptime_diff = new_diff; 1329 uptime_diff_set = 1; 1330 return; 1331 } 1332 1333 if ((new_diff - 5 > uptime_diff) || (new_diff + 5 < uptime_diff)) { 1334 /* system time has changed, update counters and timeouts */ 1335 info("System time change detected."); 1336 start_time.tv_sec += new_diff - uptime_diff; 1337 1338 for (p = callout; p != NULL; p = p->c_next) 1339 p->c_time.tv_sec += new_diff - uptime_diff; 1340 } 1341 uptime_diff = new_diff; 1342} 1343 1344/* 1345 * timeout - Schedule a timeout. 1346 */ 1347void 1348timeout(func, arg, secs, usecs) 1349 void (*func) __P((void *)); 1350 void *arg; 1351 int secs, usecs; 1352{ 1353 struct callout *newp, *p, **pp; 1354 1355 /* 1356 * Allocate timeout. 1357 */ 1358 if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL) 1359 fatal("Out of memory in timeout()!"); 1360 newp->c_arg = arg; 1361 newp->c_func = func; 1362 gettimeofday(&timenow, NULL); 1363 newp->c_time.tv_sec = timenow.tv_sec + secs; 1364 newp->c_time.tv_usec = timenow.tv_usec + usecs; 1365 if (newp->c_time.tv_usec >= 1000000) { 1366 newp->c_time.tv_sec += newp->c_time.tv_usec / 1000000; 1367 newp->c_time.tv_usec %= 1000000; 1368 } 1369 1370 /* 1371 * Find correct place and link it in. 1372 */ 1373 for (pp = &callout; (p = *pp); pp = &p->c_next) 1374 if (newp->c_time.tv_sec < p->c_time.tv_sec 1375 || (newp->c_time.tv_sec == p->c_time.tv_sec 1376 && newp->c_time.tv_usec < p->c_time.tv_usec)) 1377 break; 1378 newp->c_next = p; 1379 *pp = newp; 1380} 1381 1382 1383/* 1384 * untimeout - Unschedule a timeout. 1385 */ 1386void 1387untimeout(func, arg) 1388 void (*func) __P((void *)); 1389 void *arg; 1390{ 1391 struct callout **copp, *freep; 1392 1393 /* 1394 * Find first matching timeout and remove it from the list. 1395 */ 1396 for (copp = &callout; (freep = *copp); copp = &freep->c_next) 1397 if (freep->c_func == func && freep->c_arg == arg) { 1398 *copp = freep->c_next; 1399 free((char *) freep); 1400 break; 1401 } 1402} 1403 1404 1405/* 1406 * calltimeout - Call any timeout routines which are now due. 1407 */ 1408static void 1409calltimeout() 1410{ 1411 struct callout *p; 1412 1413 check_time(); 1414 1415 while (callout != NULL) { 1416 p = callout; 1417 1418 if (gettimeofday(&timenow, NULL) < 0) 1419 fatal("Failed to get time of day: %m"); 1420 if (!(p->c_time.tv_sec < timenow.tv_sec 1421 || (p->c_time.tv_sec == timenow.tv_sec 1422 && p->c_time.tv_usec <= timenow.tv_usec))) 1423 break; /* no, it's not time yet */ 1424 1425 callout = p->c_next; 1426 (*p->c_func)(p->c_arg); 1427 1428 free((char *) p); 1429 } 1430} 1431 1432 1433/* 1434 * timeleft - return the length of time until the next timeout is due. 1435 */ 1436static struct timeval * 1437timeleft(tvp) 1438 struct timeval *tvp; 1439{ 1440 if (callout == NULL) 1441 return NULL; 1442 1443 check_time(); 1444 1445 gettimeofday(&timenow, NULL); 1446 tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec; 1447 tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec; 1448 if (tvp->tv_usec < 0) { 1449 tvp->tv_usec += 1000000; 1450 tvp->tv_sec -= 1; 1451 } 1452 if (tvp->tv_sec < 0) 1453 tvp->tv_sec = tvp->tv_usec = 0; 1454 1455 return tvp; 1456} 1457 1458 1459/* 1460 * kill_my_pg - send a signal to our process group, and ignore it ourselves. 1461 * We assume that sig is currently blocked. 1462 */ 1463static void 1464kill_my_pg(sig) 1465 int sig; 1466{ 1467 struct sigaction act, oldact; 1468 struct subprocess *chp; 1469 1470 if (!detached) { 1471 /* 1472 * There might be other things in our process group that we 1473 * didn't start that would get hit if we did a kill(0), so 1474 * just send the signal individually to our children. 1475 */ 1476 for (chp = children; chp != NULL; chp = chp->next) 1477 if (chp->killable) 1478 kill(chp->pid, sig); 1479 return; 1480 } 1481 1482 /* We've done a setsid(), so we can just use a kill(0) */ 1483 sigemptyset(&act.sa_mask); /* unnecessary in fact */ 1484 act.sa_handler = SIG_IGN; 1485 act.sa_flags = 0; 1486 kill(0, sig); 1487 /* 1488 * The kill() above made the signal pending for us, as well as 1489 * the rest of our process group, but we don't want it delivered 1490 * to us. It is blocked at the moment. Setting it to be ignored 1491 * will cause the pending signal to be discarded. If we did the 1492 * kill() after setting the signal to be ignored, it is unspecified 1493 * (by POSIX) whether the signal is immediately discarded or left 1494 * pending, and in fact Linux would leave it pending, and so it 1495 * would be delivered after the current signal handler exits, 1496 * leading to an infinite loop. 1497 */ 1498 sigaction(sig, &act, &oldact); 1499 sigaction(sig, &oldact, NULL); 1500} 1501 1502 1503/* 1504 * hup - Catch SIGHUP signal. 1505 * 1506 * Indicates that the physical layer has been disconnected. 1507 * We don't rely on this indication; if the user has sent this 1508 * signal, we just take the link down. 1509 */ 1510static void 1511hup(sig) 1512 int sig; 1513{ 1514 /* can't log a message here, it can deadlock */ 1515 got_sighup = 1; 1516 if (conn_running) 1517 /* Send the signal to the [dis]connector process(es) also */ 1518 kill_my_pg(sig); 1519 notify(sigreceived, sig); 1520 if (waiting) 1521 siglongjmp(sigjmp, 1); 1522} 1523 1524 1525/* 1526 * term - Catch SIGTERM signal and SIGINT signal (^C/del). 1527 * 1528 * Indicates that we should initiate a graceful disconnect and exit. 1529 */ 1530/*ARGSUSED*/ 1531static void 1532term(sig) 1533 int sig; 1534{ 1535 /* can't log a message here, it can deadlock */ 1536 got_sigterm = sig; 1537 if (conn_running) 1538 /* Send the signal to the [dis]connector process(es) also */ 1539 kill_my_pg(sig); 1540 notify(sigreceived, sig); 1541 if (waiting) 1542 siglongjmp(sigjmp, 1); 1543} 1544 1545 1546/* 1547 * chld - Catch SIGCHLD signal. 1548 * Sets a flag so we will call reap_kids in the mainline. 1549 */ 1550static void 1551chld(sig) 1552 int sig; 1553{ 1554 got_sigchld = 1; 1555 if (waiting) 1556 siglongjmp(sigjmp, 1); 1557} 1558 1559 1560/* 1561 * toggle_debug - Catch SIGUSR1 signal. 1562 * 1563 * Toggle debug flag. 1564 */ 1565/*ARGSUSED*/ 1566static void 1567toggle_debug(sig) 1568 int sig; 1569{ 1570 debug = !debug; 1571 if (debug) { 1572 setlogmask(LOG_UPTO(LOG_DEBUG)); 1573 } else { 1574 setlogmask(LOG_UPTO(LOG_WARNING)); 1575 } 1576} 1577 1578 1579/* 1580 * open_ccp - Catch SIGUSR2 signal. 1581 * 1582 * Try to (re)negotiate compression. 1583 */ 1584/*ARGSUSED*/ 1585static void 1586open_ccp(sig) 1587 int sig; 1588{ 1589 got_sigusr2 = 1; 1590 if (waiting) 1591 siglongjmp(sigjmp, 1); 1592} 1593 1594 1595/* 1596 * bad_signal - We've caught a fatal signal. Clean up state and exit. 1597 */ 1598static void 1599bad_signal(sig) 1600 int sig; 1601{ 1602 static int crashed = 0; 1603 1604 if (crashed) 1605 _exit(127); 1606 crashed = 1; 1607 error("Fatal signal %d", sig); 1608 if (conn_running) 1609 kill_my_pg(SIGTERM); 1610 notify(sigreceived, sig); 1611 die(127); 1612} 1613 1614/* 1615 * safe_fork - Create a child process. The child closes all the 1616 * file descriptors that we don't want to leak to a script. 1617 * The parent waits for the child to do this before returning. 1618 * This also arranges for the specified fds to be dup'd to 1619 * fds 0, 1, 2 in the child. 1620 */ 1621pid_t 1622safe_fork(int infd, int outfd, int errfd) 1623{ 1624 pid_t pid; 1625 int fd, pipefd[2]; 1626 char buf[1]; 1627 1628 /* make sure fds 0, 1, 2 are occupied (probably not necessary) */ 1629 while ((fd = dup(fd_devnull)) >= 0) { 1630 if (fd > 2) { 1631 close(fd); 1632 break; 1633 } 1634 } 1635 1636 if (pipe(pipefd) == -1) 1637 pipefd[0] = pipefd[1] = -1; 1638 pid = fork(); 1639 if (pid < 0) { 1640 error("fork failed: %m"); 1641 return -1; 1642 } 1643 if (pid > 0) { 1644 /* parent */ 1645 close(pipefd[1]); 1646 /* this read() blocks until the close(pipefd[1]) below */ 1647 complete_read(pipefd[0], buf, 1); 1648 close(pipefd[0]); 1649 return pid; 1650 } 1651 1652 /* Executing in the child */ 1653 sys_close(); 1654#ifdef USE_TDB 1655 tdb_close(pppdb); 1656#endif 1657 1658 /* make sure infd, outfd and errfd won't get tromped on below */ 1659 if (infd == 1 || infd == 2) 1660 infd = dup(infd); 1661 if (outfd == 0 || outfd == 2) 1662 outfd = dup(outfd); 1663 if (errfd == 0 || errfd == 1) 1664 errfd = dup(errfd); 1665 1666 closelog(); 1667 1668 /* dup the in, out, err fds to 0, 1, 2 */ 1669 if (infd != 0) 1670 dup2(infd, 0); 1671 if (outfd != 1) 1672 dup2(outfd, 1); 1673 if (errfd != 2) 1674 dup2(errfd, 2); 1675 1676 if (log_to_fd > 2) 1677 close(log_to_fd); 1678 if (the_channel->close) 1679 (*the_channel->close)(); 1680 else 1681 close(devfd); /* some plugins don't have a close function */ 1682 close(fd_ppp); 1683 close(fd_devnull); 1684 if (infd != 0) 1685 close(infd); 1686 if (outfd != 1) 1687 close(outfd); 1688 if (errfd != 2) 1689 close(errfd); 1690 1691 notify(fork_notifier, 0); 1692 close(pipefd[0]); 1693 /* this close unblocks the read() call above in the parent */ 1694 close(pipefd[1]); 1695 1696 return 0; 1697} 1698 1699static bool 1700add_script_env(pos, newstring) 1701 int pos; 1702 char *newstring; 1703{ 1704 if (pos + 1 >= s_env_nalloc) { 1705 int new_n = pos + 17; 1706 char **newenv = realloc(script_env, new_n * sizeof(char *)); 1707 if (newenv == NULL) { 1708 free(newstring - 1); 1709 return 0; 1710 } 1711 script_env = newenv; 1712 s_env_nalloc = new_n; 1713 } 1714 script_env[pos] = newstring; 1715 script_env[pos + 1] = NULL; 1716 return 1; 1717} 1718 1719static void 1720remove_script_env(pos) 1721 int pos; 1722{ 1723 free(script_env[pos] - 1); 1724 while ((script_env[pos] = script_env[pos + 1]) != NULL) 1725 pos++; 1726} 1727 1728/* 1729 * update_system_environment - process the list of set/unset options 1730 * and update the system environment. 1731 */ 1732static void 1733update_system_environment() 1734{ 1735 struct userenv *uep; 1736 1737 for (uep = userenv_list; uep != NULL; uep = uep->ue_next) { 1738 if (uep->ue_isset) 1739 setenv(uep->ue_name, uep->ue_value, 1); 1740 else 1741 unsetenv(uep->ue_name); 1742 } 1743} 1744 1745/* 1746 * device_script - run a program to talk to the specified fds 1747 * (e.g. to run the connector or disconnector script). 1748 * stderr gets connected to the log fd or to the _PATH_CONNERRS file. 1749 */ 1750int 1751device_script(program, in, out, dont_wait) 1752 char *program; 1753 int in, out; 1754 int dont_wait; 1755{ 1756 int pid; 1757 int status = -1; 1758 int errfd; 1759 1760 if (log_to_fd >= 0) 1761 errfd = log_to_fd; 1762 else 1763 errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0644); 1764 1765 ++conn_running; 1766 pid = safe_fork(in, out, errfd); 1767 1768 if (pid != 0 && log_to_fd < 0) 1769 close(errfd); 1770 1771 if (pid < 0) { 1772 --conn_running; 1773 error("Failed to create child process: %m"); 1774 return -1; 1775 } 1776 1777 if (pid != 0) { 1778 record_child(pid, program, NULL, NULL, 1); 1779 status = 0; 1780 if (!dont_wait) { 1781 while (waitpid(pid, &status, 0) < 0) { 1782 if (errno == EINTR) 1783 continue; 1784 fatal("error waiting for (dis)connection process: %m"); 1785 } 1786 forget_child(pid, status); 1787 --conn_running; 1788 } 1789 return (status == 0 ? 0 : -1); 1790 } 1791 1792 /* here we are executing in the child */ 1793 1794 setgid(getgid()); 1795 setuid(uid); 1796 if (getuid() != uid) { 1797 fprintf(stderr, "pppd: setuid failed\n"); 1798 exit(1); 1799 } 1800 update_system_environment(); 1801 execl("/bin/sh", "sh", "-c", program, (char *)0); 1802 perror("pppd: could not exec /bin/sh"); 1803 _exit(99); 1804 /* NOTREACHED */ 1805} 1806 1807 1808/* 1809 * update_script_environment - process the list of set/unset options 1810 * and update the script environment. Note that we intentionally do 1811 * not update the TDB. These changes are layered on top right before 1812 * exec. It is not possible to use script_setenv() or 1813 * script_unsetenv() safely after this routine is run. 1814 */ 1815static void 1816update_script_environment() 1817{ 1818 struct userenv *uep; 1819 1820 for (uep = userenv_list; uep != NULL; uep = uep->ue_next) { 1821 int i; 1822 char *p, *newstring; 1823 int nlen = strlen(uep->ue_name); 1824 1825 for (i = 0; (p = script_env[i]) != NULL; i++) { 1826 if (strncmp(p, uep->ue_name, nlen) == 0 && p[nlen] == '=') 1827 break; 1828 } 1829 if (uep->ue_isset) { 1830 nlen += strlen(uep->ue_value) + 2; 1831 newstring = malloc(nlen + 1); 1832 if (newstring == NULL) 1833 continue; 1834 *newstring++ = 0; 1835 slprintf(newstring, nlen, "%s=%s", uep->ue_name, uep->ue_value); 1836 if (p != NULL) 1837 script_env[i] = newstring; 1838 else 1839 add_script_env(i, newstring); 1840 } else { 1841 remove_script_env(i); 1842 } 1843 } 1844} 1845 1846/* 1847 * run_program - execute a program with given arguments, 1848 * but don't wait for it unless wait is non-zero. 1849 * If the program can't be executed, logs an error unless 1850 * must_exist is 0 and the program file doesn't exist. 1851 * Returns -1 if it couldn't fork, 0 if the file doesn't exist 1852 * or isn't an executable plain file, or the process ID of the child. 1853 * If done != NULL, (*done)(arg) will be called later (within 1854 * reap_kids) iff the return value is > 0. 1855 */ 1856pid_t 1857run_program(prog, args, must_exist, done, arg, wait) 1858 char *prog; 1859 char **args; 1860 int must_exist; 1861 void (*done) __P((void *)); 1862 void *arg; 1863 int wait; 1864{ 1865 int pid, status; 1866 struct stat sbuf; 1867 1868 /* 1869 * First check if the file exists and is executable. 1870 * We don't use access() because that would use the 1871 * real user-id, which might not be root, and the script 1872 * might be accessible only to root. 1873 */ 1874 errno = EINVAL; 1875 if (stat(prog, &sbuf) < 0 || !S_ISREG(sbuf.st_mode) 1876 || (sbuf.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0) { 1877 if (must_exist || errno != ENOENT) 1878 warn("Can't execute %s: %m", prog); 1879 return 0; 1880 } 1881 1882 pid = safe_fork(fd_devnull, fd_devnull, fd_devnull); 1883 if (pid == -1) { 1884 error("Failed to create child process for %s: %m", prog); 1885 return -1; 1886 } 1887 if (pid != 0) { 1888 if (debug) 1889 dbglog("Script %s started (pid %d)", prog, pid); 1890 record_child(pid, prog, done, arg, 0); 1891 if (wait) { 1892 while (waitpid(pid, &status, 0) < 0) { 1893 if (errno == EINTR) 1894 continue; 1895 fatal("error waiting for script %s: %m", prog); 1896 } 1897 forget_child(pid, status); 1898 } 1899 return pid; 1900 } 1901 1902 /* Leave the current location */ 1903 (void) setsid(); /* No controlling tty. */ 1904 (void) umask (S_IRWXG|S_IRWXO); 1905 (void) chdir ("/"); /* no current directory. */ 1906 setuid(0); /* set real UID = root */ 1907 setgid(getegid()); 1908 1909#ifdef BSD 1910 /* Force the priority back to zero if pppd is running higher. */ 1911 if (setpriority (PRIO_PROCESS, 0, 0) < 0) 1912 warn("can't reset priority to 0: %m"); 1913#endif 1914 1915 /* run the program */ 1916 update_script_environment(); 1917 execve(prog, args, script_env); 1918 if (must_exist || errno != ENOENT) { 1919 /* have to reopen the log, there's nowhere else 1920 for the message to go. */ 1921 reopen_log(); 1922 syslog(LOG_ERR, "Can't execute %s: %m", prog); 1923 closelog(); 1924 } 1925 _exit(99); 1926} 1927 1928 1929/* 1930 * record_child - add a child process to the list for reap_kids 1931 * to use. 1932 */ 1933void 1934record_child(pid, prog, done, arg, killable) 1935 int pid; 1936 char *prog; 1937 void (*done) __P((void *)); 1938 void *arg; 1939 int killable; 1940{ 1941 struct subprocess *chp; 1942 1943 ++n_children; 1944 1945 chp = (struct subprocess *) malloc(sizeof(struct subprocess)); 1946 if (chp == NULL) { 1947 warn("losing track of %s process", prog); 1948 } else { 1949 chp->pid = pid; 1950 chp->prog = prog; 1951 chp->done = done; 1952 chp->arg = arg; 1953 chp->next = children; 1954 chp->killable = killable; 1955 children = chp; 1956 } 1957} 1958 1959/* 1960 * childwait_end - we got fed up waiting for the child processes to 1961 * exit, send them all a SIGTERM. 1962 */ 1963static void 1964childwait_end(arg) 1965 void *arg; 1966{ 1967 struct subprocess *chp; 1968 1969 for (chp = children; chp != NULL; chp = chp->next) { 1970 if (debug) 1971 dbglog("sending SIGTERM to process %d", chp->pid); 1972 kill(chp->pid, SIGTERM); 1973 } 1974 childwait_done = 1; 1975} 1976 1977/* 1978 * forget_child - clean up after a dead child 1979 */ 1980static void 1981forget_child(pid, status) 1982 int pid, status; 1983{ 1984 struct subprocess *chp, **prevp; 1985 1986 for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next) { 1987 if (chp->pid == pid) { 1988 --n_children; 1989 *prevp = chp->next; 1990 break; 1991 } 1992 } 1993 if (WIFSIGNALED(status)) { 1994 warn("Child process %s (pid %d) terminated with signal %d", 1995 (chp? chp->prog: "??"), pid, WTERMSIG(status)); 1996 } else if (debug) 1997 dbglog("Script %s finished (pid %d), status = 0x%x", 1998 (chp? chp->prog: "??"), pid, 1999 WIFEXITED(status) ? WEXITSTATUS(status) : status); 2000 if (chp && chp->done) 2001 (*chp->done)(chp->arg); 2002 if (chp) 2003 free(chp); 2004} 2005 2006/* 2007 * reap_kids - get status from any dead child processes, 2008 * and log a message for abnormal terminations. 2009 */ 2010static int 2011reap_kids() 2012{ 2013 int pid, status; 2014 2015 if (n_children == 0) 2016 return 0; 2017 while ((pid = waitpid(-1, &status, WNOHANG)) != -1 && pid != 0) { 2018 forget_child(pid, status); 2019 } 2020 if (pid == -1) { 2021 if (errno == ECHILD) 2022 return -1; 2023 if (errno != EINTR) 2024 error("Error waiting for child process: %m"); 2025 } 2026 return 0; 2027} 2028 2029/* 2030 * add_notifier - add a new function to be called when something happens. 2031 */ 2032void 2033add_notifier(notif, func, arg) 2034 struct notifier **notif; 2035 notify_func func; 2036 void *arg; 2037{ 2038 struct notifier *np; 2039 2040 np = malloc(sizeof(struct notifier)); 2041 if (np == 0) 2042 novm("notifier struct"); 2043 np->next = *notif; 2044 np->func = func; 2045 np->arg = arg; 2046 *notif = np; 2047} 2048 2049/* 2050 * remove_notifier - remove a function from the list of things to 2051 * be called when something happens. 2052 */ 2053void 2054remove_notifier(notif, func, arg) 2055 struct notifier **notif; 2056 notify_func func; 2057 void *arg; 2058{ 2059 struct notifier *np; 2060 2061 for (; (np = *notif) != 0; notif = &np->next) { 2062 if (np->func == func && np->arg == arg) { 2063 *notif = np->next; 2064 free(np); 2065 break; 2066 } 2067 } 2068} 2069 2070/* 2071 * notify - call a set of functions registered with add_notifier. 2072 */ 2073void 2074notify(notif, val) 2075 struct notifier *notif; 2076 int val; 2077{ 2078 struct notifier *np; 2079 2080 while ((np = notif) != 0) { 2081 notif = np->next; 2082 (*np->func)(np->arg, val); 2083 } 2084} 2085 2086/* 2087 * novm - log an error message saying we ran out of memory, and die. 2088 */ 2089void 2090novm(msg) 2091 char *msg; 2092{ 2093 fatal("Virtual memory exhausted allocating %s\n", msg); 2094} 2095 2096/* 2097 * script_setenv - set an environment variable value to be used 2098 * for scripts that we run (e.g. ip-up, auth-up, etc.) 2099 */ 2100void 2101script_setenv(var, value, iskey) 2102 char *var, *value; 2103 int iskey; 2104{ 2105 size_t varl = strlen(var); 2106 size_t vl = varl + strlen(value) + 2; 2107 int i; 2108 char *p, *newstring; 2109 2110 newstring = (char *) malloc(vl+1); 2111 if (newstring == 0) 2112 return; 2113 *newstring++ = iskey; 2114 slprintf(newstring, vl, "%s=%s", var, value); 2115 2116 /* check if this variable is already set */ 2117 if (script_env != 0) { 2118 for (i = 0; (p = script_env[i]) != 0; ++i) { 2119 if (strncmp(p, var, varl) == 0 && p[varl] == '=') { 2120#ifdef USE_TDB 2121 if (p[-1] && pppdb != NULL) 2122 delete_db_key(p); 2123#endif 2124 free(p-1); 2125 script_env[i] = newstring; 2126#ifdef USE_TDB 2127 if (pppdb != NULL) { 2128 if (iskey) 2129 add_db_key(newstring); 2130 update_db_entry(); 2131 } 2132#endif 2133 return; 2134 } 2135 } 2136 } else { 2137 /* no space allocated for script env. ptrs. yet */ 2138 i = 0; 2139 script_env = malloc(16 * sizeof(char *)); 2140 if (script_env == 0) { 2141 free(newstring - 1); 2142 return; 2143 } 2144 s_env_nalloc = 16; 2145 } 2146 2147 if (!add_script_env(i, newstring)) 2148 return; 2149 2150#ifdef USE_TDB 2151 if (pppdb != NULL) { 2152 if (iskey) 2153 add_db_key(newstring); 2154 update_db_entry(); 2155 } 2156#endif 2157} 2158 2159/* 2160 * script_unsetenv - remove a variable from the environment 2161 * for scripts. 2162 */ 2163void 2164script_unsetenv(var) 2165 char *var; 2166{ 2167 int vl = strlen(var); 2168 int i; 2169 char *p; 2170 2171 if (script_env == 0) 2172 return; 2173 for (i = 0; (p = script_env[i]) != 0; ++i) { 2174 if (strncmp(p, var, vl) == 0 && p[vl] == '=') { 2175#ifdef USE_TDB 2176 if (p[-1] && pppdb != NULL) 2177 delete_db_key(p); 2178#endif 2179 remove_script_env(i); 2180 break; 2181 } 2182 } 2183#ifdef USE_TDB 2184 if (pppdb != NULL) 2185 update_db_entry(); 2186#endif 2187} 2188 2189/* 2190 * Any arbitrary string used as a key for locking the database. 2191 * It doesn't matter what it is as long as all pppds use the same string. 2192 */ 2193#define PPPD_LOCK_KEY "pppd lock" 2194 2195/* 2196 * lock_db - get an exclusive lock on the TDB database. 2197 * Used to ensure atomicity of various lookup/modify operations. 2198 */ 2199void lock_db() 2200{ 2201#ifdef USE_TDB 2202 TDB_DATA key; 2203 2204 key.dptr = PPPD_LOCK_KEY; 2205 key.dsize = strlen(key.dptr); 2206 tdb_chainlock(pppdb, key); 2207#endif 2208} 2209 2210/* 2211 * unlock_db - remove the exclusive lock obtained by lock_db. 2212 */ 2213void unlock_db() 2214{ 2215#ifdef USE_TDB 2216 TDB_DATA key; 2217 2218 key.dptr = PPPD_LOCK_KEY; 2219 key.dsize = strlen(key.dptr); 2220 tdb_chainunlock(pppdb, key); 2221#endif 2222} 2223 2224#ifdef USE_TDB 2225/* 2226 * update_db_entry - update our entry in the database. 2227 */ 2228static void 2229update_db_entry() 2230{ 2231 TDB_DATA key, dbuf; 2232 int vlen, i; 2233 char *p, *q, *vbuf; 2234 2235 if (script_env == NULL) 2236 return; 2237 vlen = 0; 2238 for (i = 0; (p = script_env[i]) != 0; ++i) 2239 vlen += strlen(p) + 1; 2240 vbuf = malloc(vlen + 1); 2241 if (vbuf == 0) 2242 novm("database entry"); 2243 q = vbuf; 2244 for (i = 0; (p = script_env[i]) != 0; ++i) 2245 q += slprintf(q, vbuf + vlen - q, "%s;", p); 2246 2247 key.dptr = db_key; 2248 key.dsize = strlen(db_key); 2249 dbuf.dptr = vbuf; 2250 dbuf.dsize = vlen; 2251 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE)) 2252 error("tdb_store failed: %s", tdb_errorstr(pppdb)); 2253 2254 if (vbuf) 2255 free(vbuf); 2256 2257} 2258 2259/* 2260 * add_db_key - add a key that we can use to look up our database entry. 2261 */ 2262static void 2263add_db_key(str) 2264 const char *str; 2265{ 2266 TDB_DATA key, dbuf; 2267 2268 key.dptr = (char *) str; 2269 key.dsize = strlen(str); 2270 dbuf.dptr = db_key; 2271 dbuf.dsize = strlen(db_key); 2272 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE)) 2273 error("tdb_store key failed: %s", tdb_errorstr(pppdb)); 2274} 2275 2276/* 2277 * delete_db_key - delete a key for looking up our database entry. 2278 */ 2279static void 2280delete_db_key(str) 2281 const char *str; 2282{ 2283 TDB_DATA key; 2284 2285 key.dptr = (char *) str; 2286 key.dsize = strlen(str); 2287 tdb_delete(pppdb, key); 2288} 2289 2290/* 2291 * cleanup_db - delete all the entries we put in the database. 2292 */ 2293static void 2294cleanup_db() 2295{ 2296 TDB_DATA key; 2297 int i; 2298 char *p; 2299 2300 key.dptr = db_key; 2301 key.dsize = strlen(db_key); 2302 tdb_delete(pppdb, key); 2303 for (i = 0; (p = script_env[i]) != 0; ++i) 2304 if (p[-1]) 2305 delete_db_key(p); 2306} 2307#endif /* USE_TDB */ 2308