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 1.153 2006/06/04 03:52:50 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 94#include "pppd.h" 95#include "magic.h" 96#include "fsm.h" 97#include "lcp.h" 98#include "ipcp.h" 99#ifdef INET6 100#include "ipv6cp.h" 101#endif 102#include "upap.h" 103#include "chap-new.h" 104#include "eap.h" 105#include "ccp.h" 106#include "ecp.h" 107#include "pathnames.h" 108 109#ifdef USE_TDB 110#include "tdb.h" 111#endif 112 113#ifdef CBCP_SUPPORT 114#include "cbcp.h" 115#endif 116 117#ifdef IPX_CHANGE 118#include "ipxcp.h" 119#endif /* IPX_CHANGE */ 120#ifdef AT_CHANGE 121#include "atcp.h" 122#endif 123 124static const char rcsid[] = RCSID; 125 126/* interface vars */ 127char ifname[32]; /* Interface name */ 128int ifunit; /* Interface unit number */ 129 130struct channel *the_channel; 131 132char *progname; /* Name of this program */ 133char hostname[MAXNAMELEN]; /* Our hostname */ 134static char pidfilename[MAXPATHLEN]; /* name of pid file */ 135static char linkpidfile[MAXPATHLEN]; /* name of linkname pid file */ 136char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */ 137uid_t uid; /* Our real user-id */ 138struct notifier *pidchange = NULL; 139struct notifier *phasechange = NULL; 140struct notifier *exitnotify = NULL; 141struct notifier *sigreceived = NULL; 142struct notifier *fork_notifier = NULL; 143 144int hungup; /* terminal has been hung up */ 145int privileged; /* we're running as real uid root */ 146int need_holdoff; /* need holdoff period before restarting */ 147int detached; /* have detached from terminal */ 148volatile int status; /* exit status for pppd */ 149int unsuccess; /* # unsuccessful connection attempts */ 150int do_callback; /* != 0 if we should do callback next */ 151int doing_callback; /* != 0 if we are doing callback */ 152int ppp_session_number; /* Session number, for channels with such a 153 concept (eg PPPoE) */ 154int childwait_done; /* have timed out waiting for children */ 155 156#ifdef USE_TDB 157TDB_CONTEXT *pppdb; /* database for storing status etc. */ 158#endif 159 160char db_key[32]; 161 162int (*holdoff_hook) __P((void)) = NULL; 163int (*new_phase_hook) __P((int)) = NULL; 164void (*snoop_recv_hook) __P((unsigned char *p, int len)) = NULL; 165void (*snoop_send_hook) __P((unsigned char *p, int len)) = NULL; 166 167static int conn_running; /* we have a [dis]connector running */ 168static int fd_loop; /* fd for getting demand-dial packets */ 169 170int fd_devnull; /* fd for /dev/null */ 171int devfd = -1; /* fd of underlying device */ 172int fd_ppp = -1; /* fd for talking PPP */ 173int phase; /* where the link is at */ 174int kill_link; 175int asked_to_quit; 176int open_ccp_flag; 177int listen_time; 178int got_sigusr2; 179int got_sigterm; 180int got_sighup; 181/* Foxconn added start Winster Chan 12/23/2005 */ 182int got_sigusr1; /* Add signal SIGUSR1 */ 183int conn_link = 1; 184/* Foxconn added end Winster Chan 12/23/2005 */ 185 186static sigset_t signals_handled; 187static int waiting; 188static sigjmp_buf sigjmp; 189 190char **script_env; /* Env. variable values for scripts */ 191int s_env_nalloc; /* # words avail at script_env */ 192 193u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */ 194u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */ 195 196static int n_children; /* # child processes still running */ 197static int got_sigchld; /* set if we have received a SIGCHLD */ 198 199int privopen; /* don't lock, open device as root */ 200 201char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n"; 202 203GIDSET_TYPE groups[NGROUPS_MAX];/* groups the user is in */ 204int ngroups; /* How many groups valid in groups */ 205 206static struct timeval start_time; /* Time when link was started. */ 207 208static struct pppd_stats old_link_stats; 209struct pppd_stats link_stats; 210unsigned link_connect_time; 211int link_stats_valid; 212 213int error_count; 214 215bool bundle_eof; 216bool bundle_terminating; 217 218/* 219 * We maintain a list of child process pids and 220 * functions to call when they exit. 221 */ 222struct subprocess { 223 pid_t pid; 224 char *prog; 225 void (*done) __P((void *)); 226 void *arg; 227 struct subprocess *next; 228}; 229 230static struct subprocess *children; 231 232/* Prototypes for procedures local to this file. */ 233 234static void setup_signals __P((void)); 235static void create_pidfile __P((int pid)); 236static void create_linkpidfile __P((int pid)); 237static void cleanup __P((void)); 238static void get_input __P((void)); 239static void calltimeout __P((void)); 240static struct timeval *timeleft __P((struct timeval *)); 241static void kill_my_pg __P((int)); 242static void hup __P((int)); 243static void term __P((int)); 244static void chld __P((int)); 245static void toggle_debug __P((int)); 246static void open_ccp __P((int)); 247static void bad_signal __P((int)); 248static void holdoff_end __P((void *)); 249static void forget_child __P((int pid, int status)); 250static int reap_kids __P((void)); 251static void childwait_end __P((void *)); 252 253#ifdef USE_TDB 254static void update_db_entry __P((void)); 255static void add_db_key __P((const char *)); 256static void delete_db_key __P((const char *)); 257static void cleanup_db __P((void)); 258#endif 259 260static void handle_events __P((void)); 261void print_link_stats __P((void)); 262 263extern char *ttyname __P((int)); 264extern char *getlogin __P((void)); 265int main __P((int, char *[])); 266 267#ifdef ultrix 268#undef O_NONBLOCK 269#define O_NONBLOCK O_NDELAY 270#endif 271 272#ifdef ULTRIX 273#define setlogmask(x) 274#endif 275 276/* 277 * PPP Data Link Layer "protocol" table. 278 * One entry per supported protocol. 279 * The last entry must be NULL. 280 */ 281struct protent *protocols[] = { 282 &lcp_protent, 283 &pap_protent, 284 &chap_protent, 285#ifdef CBCP_SUPPORT 286 &cbcp_protent, 287#endif 288 &ipcp_protent, 289#ifdef INET6 290 &ipv6cp_protent, 291#endif 292 &ccp_protent, 293 &ecp_protent, 294#ifdef IPX_CHANGE 295 &ipxcp_protent, 296#endif 297#ifdef AT_CHANGE 298 &atcp_protent, 299#endif 300 &eap_protent, 301 NULL 302}; 303 304/* 305 * If PPP_DRV_NAME is not defined, use the default "ppp" as the device name. 306 */ 307#if !defined(PPP_DRV_NAME) 308#define PPP_DRV_NAME "ppp" 309#endif /* !defined(PPP_DRV_NAME) */ 310 311int 312main(argc, argv) 313 int argc; 314 char *argv[]; 315{ 316 int i, t; 317 char *p; 318 struct passwd *pw; 319 struct protent *protp; 320 char numbuf[16]; 321 322 link_stats_valid = 0; 323 new_phase(PHASE_INITIALIZE); 324 325 script_env = NULL; 326 327 /* Initialize syslog facilities */ 328 reopen_log(); 329 330 if (gethostname(hostname, MAXNAMELEN) < 0 ) { 331 option_error("Couldn't get hostname: %m"); 332 exit(1); 333 } 334 hostname[MAXNAMELEN-1] = 0; 335 336 /* make sure we don't create world or group writable files. */ 337 umask(umask(0777) | 022); 338 339 uid = getuid(); 340 privileged = uid == 0; 341 slprintf(numbuf, sizeof(numbuf), "%d", uid); 342 script_setenv("ORIG_UID", numbuf, 0); 343 344 ngroups = getgroups(NGROUPS_MAX, groups); 345 346 /* 347 * Initialize magic number generator now so that protocols may 348 * use magic numbers in initialization. 349 */ 350 magic_init(); 351 352 /* 353 * Initialize each protocol. 354 */ 355 for (i = 0; (protp = protocols[i]) != NULL; ++i) 356 (*protp->init)(0); 357 358 /* 359 * Initialize the default channel. 360 */ 361 tty_init(); 362 363 progname = *argv; 364 365 /* foxconn added start, zacker, 04/20/2011 */ 366 if (strstr(progname, "pppdv6")) 367 { 368 path_upapfile = _PATH_UPAPFILE_IPV6; 369 path_chapfile = _PATH_CHAPFILE_IPV6; 370 path_srpfile = _PATH_SRPFILE_IPV6; 371 } 372 /* foxconn added end, zacker, 04/20/2011 */ 373 374 /* 375 * Parse, in order, the system options file, the user's options file, 376 * and the command line arguments. 377 */ 378 if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1) 379 || !options_from_user() 380 || !parse_args(argc-1, argv+1)) 381 exit(EXIT_OPTION_ERROR); 382 devnam_fixed = 1; /* can no longer change device name */ 383 384 /* 385 * Work out the device name, if it hasn't already been specified, 386 * and parse the tty's options file. 387 */ 388 if (the_channel->process_extra_options) 389 (*the_channel->process_extra_options)(); 390 /* Foxconn add start by Adams 12/20/2007 */ 391#ifdef SUPPORT_PPP_DEBUG 392 if( debug_level >0 && debug_level < 8) 393 { 394 switch(debug_level){ 395 case 1: 396 setlogmask(LOG_UPTO(LOG_EMERG)); 397 break; 398 case 2: 399 setlogmask(LOG_UPTO(LOG_ALERT)); 400 break; 401 case 3: 402 setlogmask(LOG_UPTO(LOG_CRIT)); 403 break; 404 case 4: 405 setlogmask(LOG_UPTO(LOG_ERR)); 406 break; 407 case 5: 408 setlogmask(LOG_UPTO(LOG_WARNING)); 409 break; 410 case 6: 411 setlogmask(LOG_UPTO(LOG_NOTICE)); 412 break; 413 case 7: 414 setlogmask(LOG_UPTO(LOG_INFO)); 415 break; 416 case 8: 417 setlogmask(LOG_UPTO(LOG_DEBUG)); 418 break; 419 } 420 } 421#else 422 if (debug) 423 setlogmask(LOG_UPTO(LOG_DEBUG)); 424#endif 425 /* 426 * Check that we are running as root. 427 */ 428 if (geteuid() != 0) { 429 option_error("must be root to run %s, since it is not setuid-root", 430 argv[0]); 431 exit(EXIT_NOT_ROOT); 432 } 433 434 if (!ppp_available()) { 435 option_error("%s", no_ppp_msg); 436 exit(EXIT_NO_KERNEL_SUPPORT); 437 } 438 439 /* 440 * Check that the options given are valid and consistent. 441 */ 442 check_options(); 443 if (!sys_check_options()) 444 exit(EXIT_OPTION_ERROR); 445 auth_check_options(); 446#ifdef HAVE_MULTILINK 447 mp_check_options(); 448#endif 449 for (i = 0; (protp = protocols[i]) != NULL; ++i) 450 if (protp->check_options != NULL) 451 (*protp->check_options)(); 452 if (the_channel->check_options) 453 (*the_channel->check_options)(); 454 455 456 if (dump_options || dryrun) { 457 init_pr_log(NULL, LOG_INFO); 458 print_options(pr_log, NULL); 459 end_pr_log(); 460 } 461 462 if (dryrun) 463 die(0); 464 465 /* Make sure fds 0, 1, 2 are open to somewhere. */ 466 fd_devnull = open(_PATH_DEVNULL, O_RDWR); 467 if (fd_devnull < 0) 468 fatal("Couldn't open %s: %m", _PATH_DEVNULL); 469 while (fd_devnull <= 2) { 470 i = dup(fd_devnull); 471 if (i < 0) 472 fatal("Critical shortage of file descriptors: dup failed: %m"); 473 fd_devnull = i; 474 } 475 476 /* 477 * Initialize system-dependent stuff. 478 */ 479 sys_init(); 480 481#ifdef USE_TDB 482 pppdb = tdb_open(_PATH_PPPDB, 0, 0, O_RDWR|O_CREAT, 0644); 483 if (pppdb != NULL) { 484 slprintf(db_key, sizeof(db_key), "pppd%d", getpid()); 485 update_db_entry(); 486 } else { 487 warn("Warning: couldn't open ppp database %s", _PATH_PPPDB); 488 if (multilink) { 489 warn("Warning: disabling multilink"); 490 multilink = 0; 491 } 492 } 493#endif 494 495 /* 496 * Detach ourselves from the terminal, if required, 497 * and identify who is running us. 498 */ 499 if (!nodetach && !updetach) 500 detach(); 501 p = getlogin(); 502 if (p == NULL) { 503 pw = getpwuid(uid); 504 if (pw != NULL && pw->pw_name != NULL) 505 p = pw->pw_name; 506 else 507 p = "(unknown)"; 508 } 509#if defined(USE_SYSLOG) /* foxconn wklin added, 08/13/2007 */ 510 syslog(LOG_NOTICE, "pppd %s started by %s, uid %d", VERSION, p, uid); 511#endif 512 script_setenv("PPPLOGNAME", p, 0); 513 514 if (devnam[0]) 515 script_setenv("DEVICE", devnam, 1); 516 slprintf(numbuf, sizeof(numbuf), "%d", getpid()); 517 script_setenv("PPPD_PID", numbuf, 1); 518 519 setup_signals(); 520 521 create_linkpidfile(getpid()); 522 523 waiting = 0; 524 525 /* 526 * If we're doing dial-on-demand, set up the interface now. 527 */ 528 if (demand) { 529 /* 530 * Open the loopback channel and set it up to be the ppp interface. 531 */ 532 fd_loop = open_ppp_loopback(); 533 set_ifunit(1); 534 /* 535 * Configure the interface and mark it up, etc. 536 */ 537 demand_conf(); 538 } 539 540 do_callback = 0; 541 for (;;) { 542 543 bundle_eof = 0; 544 bundle_terminating = 0; 545 listen_time = 0; 546 need_holdoff = 1; 547 devfd = -1; 548 status = EXIT_OK; 549 ++unsuccess; 550 doing_callback = do_callback; 551 do_callback = 0; 552 553 if (demand && !doing_callback) { 554 /* 555 * Don't do anything until we see some activity. 556 */ 557 new_phase(PHASE_DORMANT); 558 demand_unblock(); 559 add_fd(fd_loop); 560 for (;;) { 561 handle_events(); 562 if (asked_to_quit) 563 break; 564 /* Foxconn modified start Winster Chan 12/23/2005 */ 565#if 0 566 if (get_loop_output()) 567 break; 568#else 569 if (conn_link) { 570 if (get_loop_output()) 571 break; 572 } 573 else { 574 demand_discard2(); 575 } 576#endif 577 /* Foxconn modified end Winster Chan 12/23/2005 */ 578 } 579 remove_fd(fd_loop); 580 if (asked_to_quit) 581 break; 582 583 /* 584 * Now we want to bring up the link. 585 */ 586 demand_block(); 587 info("Starting link"); 588 } 589 590 gettimeofday(&start_time, NULL); 591 script_unsetenv("CONNECT_TIME"); 592 script_unsetenv("BYTES_SENT"); 593 script_unsetenv("BYTES_RCVD"); 594 595 lcp_open(0); /* Start protocol */ 596 start_link(0); 597 while (phase != PHASE_DEAD) { 598 handle_events(); 599 get_input(); 600 if (kill_link) 601 lcp_close(0, "User request"); 602 if (asked_to_quit) { 603 bundle_terminating = 1; 604 if (phase == PHASE_MASTER) 605 mp_bundle_terminated(); 606 } 607 if (open_ccp_flag) { 608 if (phase == PHASE_NETWORK || phase == PHASE_RUNNING) { 609 ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */ 610 (*ccp_protent.open)(0); 611 } 612 } 613 } 614 /* restore FSMs to original state */ 615 lcp_close(0, ""); 616 617 if (!persist || asked_to_quit || (maxfail > 0 && unsuccess >= maxfail)) 618 break; 619 620 if (demand) 621 demand_discard(); 622 t = need_holdoff? holdoff: 0; 623 if (holdoff_hook) 624 t = (*holdoff_hook)(); 625 if (t > 0) { 626 new_phase(PHASE_HOLDOFF); 627 TIMEOUT(holdoff_end, NULL, t); 628 do { 629 handle_events(); 630 if (kill_link) 631 new_phase(PHASE_DORMANT); /* allow signal to end holdoff */ 632 } while (phase == PHASE_HOLDOFF); 633 if (!persist) 634 break; 635 } 636 } 637 638 /* Wait for scripts to finish */ 639 reap_kids(); 640 if (n_children > 0) { 641 if (child_wait > 0) 642 TIMEOUT(childwait_end, NULL, child_wait); 643 if (debug) { 644 struct subprocess *chp; 645 dbglog("Waiting for %d child processes...", n_children); 646 for (chp = children; chp != NULL; chp = chp->next) 647 dbglog(" script %s, pid %d", chp->prog, chp->pid); 648 } 649 while (n_children > 0 && !childwait_done) { 650 handle_events(); 651 if (kill_link && !childwait_done) 652 childwait_end(NULL); 653 } 654 } 655 656 die(status); 657 return 0; 658} 659 660/* 661 * handle_events - wait for something to happen and respond to it. 662 */ 663static void 664handle_events() 665{ 666 struct timeval timo; 667 668 kill_link = open_ccp_flag = 0; 669 if (sigsetjmp(sigjmp, 1) == 0) { 670 sigprocmask(SIG_BLOCK, &signals_handled, NULL); 671 /* Foxconn modified start Winster Chan 12/23/2005 */ 672#if 0 673 if (got_sighup || got_sigterm || got_sigusr2 || got_sigchld) { 674#else 675 if (got_sighup || got_sigterm || got_sigusr2 || got_sigchld || got_sigusr1) { 676#endif 677 /* Foxconn modified end Winster Chan 12/23/2005 */ 678 sigprocmask(SIG_UNBLOCK, &signals_handled, NULL); 679 } else { 680 waiting = 1; 681 sigprocmask(SIG_UNBLOCK, &signals_handled, NULL); 682 wait_input(timeleft(&timo)); 683 } 684 } 685 waiting = 0; 686 calltimeout(); 687 if (got_sighup) { 688 info("Hangup (SIGHUP)"); 689 kill_link = 1; 690 got_sighup = 0; 691 if (status != EXIT_HANGUP) 692 status = EXIT_USER_REQUEST; 693 } 694 if (got_sigterm) { 695 info("Terminating on signal %d", got_sigterm); 696 kill_link = 1; 697 asked_to_quit = 1; 698 persist = 0; 699 status = EXIT_USER_REQUEST; 700 got_sigterm = 0; 701 } 702 if (got_sigchld) { 703 got_sigchld = 0; 704 reap_kids(); /* Don't leave dead kids lying around */ 705 } 706 if (got_sigusr2) { 707 /* Foxconn modified start Winster Chan 12/23/2005 */ 708#if 0 709 open_ccp_flag = 1; 710 got_sigusr2 = 0; 711#else 712 kill_link = 0; 713 conn_link = 1; 714 got_sigusr2 = 0; 715#endif 716 /* Foxconn modified end Winster Chan 12/23/2005 */ 717 } 718 /* Foxconn added start Winster Chan 12/23/2005 */ 719 if (got_sigusr1) { 720 kill_link = 1; 721 conn_link = 0; 722 need_holdoff = 0; 723 status = EXIT_USER_REQUEST; 724 got_sigusr1 = 0; 725 } 726 /* Foxconn added end Winster Chan 12/23/2005 */ 727} 728 729/* 730 * setup_signals - initialize signal handling. 731 */ 732static void 733setup_signals() 734{ 735 struct sigaction sa; 736 737 /* 738 * Compute mask of all interesting signals and install signal handlers 739 * for each. Only one signal handler may be active at a time. Therefore, 740 * all other signals should be masked when any handler is executing. 741 */ 742 sigemptyset(&signals_handled); 743 sigaddset(&signals_handled, SIGHUP); 744 sigaddset(&signals_handled, SIGINT); 745 sigaddset(&signals_handled, SIGTERM); 746 sigaddset(&signals_handled, SIGCHLD); 747 sigaddset(&signals_handled, SIGUSR2); 748 749#define SIGNAL(s, handler) do { \ 750 sa.sa_handler = handler; \ 751 if (sigaction(s, &sa, NULL) < 0) \ 752 fatal("Couldn't establish signal handler (%d): %m", s); \ 753 } while (0) 754 755 sa.sa_mask = signals_handled; 756 sa.sa_flags = 0; 757 SIGNAL(SIGHUP, hup); /* Hangup */ 758 SIGNAL(SIGINT, term); /* Interrupt */ 759 SIGNAL(SIGTERM, term); /* Terminate */ 760 SIGNAL(SIGCHLD, chld); 761 762 SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */ 763 SIGNAL(SIGUSR2, open_ccp); /* Reopen CCP */ 764 765 /* 766 * Install a handler for other signals which would otherwise 767 * cause pppd to exit without cleaning up. 768 */ 769 SIGNAL(SIGABRT, bad_signal); 770 SIGNAL(SIGALRM, bad_signal); 771 SIGNAL(SIGFPE, bad_signal); 772 SIGNAL(SIGILL, bad_signal); 773 SIGNAL(SIGPIPE, bad_signal); 774 SIGNAL(SIGQUIT, bad_signal); 775 SIGNAL(SIGSEGV, bad_signal); 776#ifdef SIGBUS 777 SIGNAL(SIGBUS, bad_signal); 778#endif 779#ifdef SIGEMT 780 SIGNAL(SIGEMT, bad_signal); 781#endif 782#ifdef SIGPOLL 783 SIGNAL(SIGPOLL, bad_signal); 784#endif 785#ifdef SIGPROF 786 SIGNAL(SIGPROF, bad_signal); 787#endif 788#ifdef SIGSYS 789 SIGNAL(SIGSYS, bad_signal); 790#endif 791#ifdef SIGTRAP 792 SIGNAL(SIGTRAP, bad_signal); 793#endif 794#ifdef SIGVTALRM 795 SIGNAL(SIGVTALRM, bad_signal); 796#endif 797#ifdef SIGXCPU 798 SIGNAL(SIGXCPU, bad_signal); 799#endif 800#ifdef SIGXFSZ 801 SIGNAL(SIGXFSZ, bad_signal); 802#endif 803 804 /* 805 * Apparently we can get a SIGPIPE when we call syslog, if 806 * syslogd has died and been restarted. Ignoring it seems 807 * be sufficient. 808 */ 809 signal(SIGPIPE, SIG_IGN); 810} 811 812/* 813 * set_ifunit - do things we need to do once we know which ppp 814 * unit we are using. 815 */ 816void 817set_ifunit(iskey) 818 int iskey; 819{ 820 info("Using interface %s%d", PPP_DRV_NAME, ifunit); 821 slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit); 822 script_setenv("IFNAME", ifname, iskey); 823 if (iskey) { 824 create_pidfile(getpid()); /* write pid to file */ 825 create_linkpidfile(getpid()); 826 } 827} 828 829/* 830 * detach - detach us from the controlling terminal. 831 */ 832void 833detach() 834{ 835 int pid; 836 char numbuf[16]; 837 int pipefd[2]; 838 839 if (detached) 840 return; 841 if (pipe(pipefd) == -1) 842 pipefd[0] = pipefd[1] = -1; 843 if ((pid = fork()) < 0) { 844 error("Couldn't detach (fork failed: %m)"); 845 die(1); /* or just return? */ 846 } 847 if (pid != 0) { 848 /* parent */ 849 notify(pidchange, pid); 850 /* update pid files if they have been written already */ 851 if (pidfilename[0]) 852 create_pidfile(pid); 853 if (linkpidfile[0]) 854 create_linkpidfile(pid); 855 exit(0); /* parent dies */ 856 } 857 setsid(); 858 chdir("/"); 859 dup2(fd_devnull, 0); 860 dup2(fd_devnull, 1); 861 dup2(fd_devnull, 2); 862 detached = 1; 863 if (log_default) 864 log_to_fd = -1; 865 slprintf(numbuf, sizeof(numbuf), "%d", getpid()); 866 script_setenv("PPPD_PID", numbuf, 1); 867 868 /* wait for parent to finish updating pid & lock files and die */ 869 close(pipefd[1]); 870 complete_read(pipefd[0], numbuf, 1); 871 close(pipefd[0]); 872} 873 874/* 875 * reopen_log - (re)open our connection to syslog. 876 */ 877void 878reopen_log() 879{ 880#if defined(USE_SYSLOG) /* foxconn wklin added, 08/13/2007 */ 881 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP); 882 setlogmask(LOG_UPTO(LOG_INFO)); 883#endif 884} 885 886/* 887 * Create a file containing our process ID. 888 */ 889static void 890create_pidfile(pid) 891 int pid; 892{ 893 FILE *pidfile; 894 895 slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid", 896 _PATH_VARRUN, ifname); 897 if ((pidfile = fopen(pidfilename, "w")) != NULL) { 898 fprintf(pidfile, "%d\n", pid); 899 (void) fclose(pidfile); 900 } else { 901 error("Failed to create pid file %s: %m", pidfilename); 902 pidfilename[0] = 0; 903 } 904} 905 906void 907create_linkpidfile(pid) 908 int pid; 909{ 910 FILE *pidfile; 911 912 if (linkname[0] == 0) 913 return; 914 script_setenv("LINKNAME", linkname, 1); 915 slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid", 916 _PATH_VARRUN, linkname); 917 if ((pidfile = fopen(linkpidfile, "w")) != NULL) { 918 fprintf(pidfile, "%d\n", pid); 919 if (ifname[0]) 920 fprintf(pidfile, "%s\n", ifname); 921 (void) fclose(pidfile); 922 } else { 923 error("Failed to create pid file %s: %m", linkpidfile); 924 linkpidfile[0] = 0; 925 } 926} 927 928/* 929 * remove_pidfile - remove our pid files 930 */ 931void remove_pidfiles() 932{ 933 if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT) 934 warn("unable to delete pid file %s: %m", pidfilename); 935 pidfilename[0] = 0; 936 if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT) 937 warn("unable to delete pid file %s: %m", linkpidfile); 938 linkpidfile[0] = 0; 939} 940 941/* 942 * holdoff_end - called via a timeout when the holdoff period ends. 943 */ 944static void 945holdoff_end(arg) 946 void *arg; 947{ 948 new_phase(PHASE_DORMANT); 949} 950 951/* List of protocol names, to make our messages a little more informative. */ 952struct protocol_list { 953 u_short proto; 954 const char *name; 955} protocol_list[] = { 956 { 0x21, "IP" }, 957 { 0x23, "OSI Network Layer" }, 958 { 0x25, "Xerox NS IDP" }, 959 { 0x27, "DECnet Phase IV" }, 960 { 0x29, "Appletalk" }, 961 { 0x2b, "Novell IPX" }, 962 { 0x2d, "VJ compressed TCP/IP" }, 963 { 0x2f, "VJ uncompressed TCP/IP" }, 964 { 0x31, "Bridging PDU" }, 965 { 0x33, "Stream Protocol ST-II" }, 966 { 0x35, "Banyan Vines" }, 967 { 0x39, "AppleTalk EDDP" }, 968 { 0x3b, "AppleTalk SmartBuffered" }, 969 { 0x3d, "Multi-Link" }, 970 { 0x3f, "NETBIOS Framing" }, 971 { 0x41, "Cisco Systems" }, 972 { 0x43, "Ascom Timeplex" }, 973 { 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" }, 974 { 0x47, "DCA Remote Lan" }, 975 { 0x49, "Serial Data Transport Protocol (PPP-SDTP)" }, 976 { 0x4b, "SNA over 802.2" }, 977 { 0x4d, "SNA" }, 978 { 0x4f, "IP6 Header Compression" }, 979 { 0x51, "KNX Bridging Data" }, 980 { 0x53, "Encryption" }, 981 { 0x55, "Individual Link Encryption" }, 982 { 0x57, "IPv6" }, 983 { 0x59, "PPP Muxing" }, 984 { 0x5b, "Vendor-Specific Network Protocol" }, 985 { 0x61, "RTP IPHC Full Header" }, 986 { 0x63, "RTP IPHC Compressed TCP" }, 987 { 0x65, "RTP IPHC Compressed non-TCP" }, 988 { 0x67, "RTP IPHC Compressed UDP 8" }, 989 { 0x69, "RTP IPHC Compressed RTP 8" }, 990 { 0x6f, "Stampede Bridging" }, 991 { 0x73, "MP+" }, 992 { 0xc1, "NTCITS IPI" }, 993 { 0xfb, "single-link compression" }, 994 { 0xfd, "Compressed Datagram" }, 995 { 0x0201, "802.1d Hello Packets" }, 996 { 0x0203, "IBM Source Routing BPDU" }, 997 { 0x0205, "DEC LANBridge100 Spanning Tree" }, 998 { 0x0207, "Cisco Discovery Protocol" }, 999 { 0x0209, "Netcs Twin Routing" }, 1000 { 0x020b, "STP - Scheduled Transfer Protocol" }, 1001 { 0x020d, "EDP - Extreme Discovery Protocol" }, 1002 { 0x0211, "Optical Supervisory Channel Protocol" }, 1003 { 0x0213, "Optical Supervisory Channel Protocol" }, 1004 { 0x0231, "Luxcom" }, 1005 { 0x0233, "Sigma Network Systems" }, 1006 { 0x0235, "Apple Client Server Protocol" }, 1007 { 0x0281, "MPLS Unicast" }, 1008 { 0x0283, "MPLS Multicast" }, 1009 { 0x0285, "IEEE p1284.4 standard - data packets" }, 1010 { 0x0287, "ETSI TETRA Network Protocol Type 1" }, 1011 { 0x0289, "Multichannel Flow Treatment Protocol" }, 1012 { 0x2063, "RTP IPHC Compressed TCP No Delta" }, 1013 { 0x2065, "RTP IPHC Context State" }, 1014 { 0x2067, "RTP IPHC Compressed UDP 16" }, 1015 { 0x2069, "RTP IPHC Compressed RTP 16" }, 1016 { 0x4001, "Cray Communications Control Protocol" }, 1017 { 0x4003, "CDPD Mobile Network Registration Protocol" }, 1018 { 0x4005, "Expand accelerator protocol" }, 1019 { 0x4007, "ODSICP NCP" }, 1020 { 0x4009, "DOCSIS DLL" }, 1021 { 0x400B, "Cetacean Network Detection Protocol" }, 1022 { 0x4021, "Stacker LZS" }, 1023 { 0x4023, "RefTek Protocol" }, 1024 { 0x4025, "Fibre Channel" }, 1025 { 0x4027, "EMIT Protocols" }, 1026 { 0x405b, "Vendor-Specific Protocol (VSP)" }, 1027 { 0x8021, "Internet Protocol Control Protocol" }, 1028 { 0x8023, "OSI Network Layer Control Protocol" }, 1029 { 0x8025, "Xerox NS IDP Control Protocol" }, 1030 { 0x8027, "DECnet Phase IV Control Protocol" }, 1031 { 0x8029, "Appletalk Control Protocol" }, 1032 { 0x802b, "Novell IPX Control Protocol" }, 1033 { 0x8031, "Bridging NCP" }, 1034 { 0x8033, "Stream Protocol Control Protocol" }, 1035 { 0x8035, "Banyan Vines Control Protocol" }, 1036 { 0x803d, "Multi-Link Control Protocol" }, 1037 { 0x803f, "NETBIOS Framing Control Protocol" }, 1038 { 0x8041, "Cisco Systems Control Protocol" }, 1039 { 0x8043, "Ascom Timeplex" }, 1040 { 0x8045, "Fujitsu LBLB Control Protocol" }, 1041 { 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" }, 1042 { 0x8049, "Serial Data Control Protocol (PPP-SDCP)" }, 1043 { 0x804b, "SNA over 802.2 Control Protocol" }, 1044 { 0x804d, "SNA Control Protocol" }, 1045 { 0x804f, "IP6 Header Compression Control Protocol" }, 1046 { 0x8051, "KNX Bridging Control Protocol" }, 1047 { 0x8053, "Encryption Control Protocol" }, 1048 { 0x8055, "Individual Link Encryption Control Protocol" }, 1049 { 0x8057, "IPv6 Control Protovol" }, 1050 { 0x8059, "PPP Muxing Control Protocol" }, 1051 { 0x805b, "Vendor-Specific Network Control Protocol (VSNCP)" }, 1052 { 0x806f, "Stampede Bridging Control Protocol" }, 1053 { 0x8073, "MP+ Control Protocol" }, 1054 { 0x80c1, "NTCITS IPI Control Protocol" }, 1055 { 0x80fb, "Single Link Compression Control Protocol" }, 1056 { 0x80fd, "Compression Control Protocol" }, 1057 { 0x8207, "Cisco Discovery Protocol Control" }, 1058 { 0x8209, "Netcs Twin Routing" }, 1059 { 0x820b, "STP - Control Protocol" }, 1060 { 0x820d, "EDPCP - Extreme Discovery Protocol Ctrl Prtcl" }, 1061 { 0x8235, "Apple Client Server Protocol Control" }, 1062 { 0x8281, "MPLSCP" }, 1063 { 0x8285, "IEEE p1284.4 standard - Protocol Control" }, 1064 { 0x8287, "ETSI TETRA TNP1 Control Protocol" }, 1065 { 0x8289, "Multichannel Flow Treatment Protocol" }, 1066 { 0xc021, "Link Control Protocol" }, 1067 { 0xc023, "Password Authentication Protocol" }, 1068 { 0xc025, "Link Quality Report" }, 1069 { 0xc027, "Shiva Password Authentication Protocol" }, 1070 { 0xc029, "CallBack Control Protocol (CBCP)" }, 1071 { 0xc02b, "BACP Bandwidth Allocation Control Protocol" }, 1072 { 0xc02d, "BAP" }, 1073 { 0xc05b, "Vendor-Specific Authentication Protocol (VSAP)" }, 1074 { 0xc081, "Container Control Protocol" }, 1075 { 0xc223, "Challenge Handshake Authentication Protocol" }, 1076 { 0xc225, "RSA Authentication Protocol" }, 1077 { 0xc227, "Extensible Authentication Protocol" }, 1078 { 0xc229, "Mitsubishi Security Info Exch Ptcl (SIEP)" }, 1079 { 0xc26f, "Stampede Bridging Authorization Protocol" }, 1080 { 0xc281, "Proprietary Authentication Protocol" }, 1081 { 0xc283, "Proprietary Authentication Protocol" }, 1082 { 0xc481, "Proprietary Node ID Authentication Protocol" }, 1083 { 0, NULL }, 1084}; 1085 1086/* 1087 * protocol_name - find a name for a PPP protocol. 1088 */ 1089const char * 1090protocol_name(proto) 1091 int proto; 1092{ 1093 struct protocol_list *lp; 1094 1095 for (lp = protocol_list; lp->proto != 0; ++lp) 1096 if (proto == lp->proto) 1097 return lp->name; 1098 return NULL; 1099} 1100 1101/* 1102 * get_input - called when incoming data is available. 1103 */ 1104static void 1105get_input() 1106{ 1107 int len, i; 1108 u_char *p; 1109 u_short protocol; 1110 struct protent *protp; 1111 1112 p = inpacket_buf; /* point to beginning of packet buffer */ 1113 1114 len = read_packet(inpacket_buf); 1115 if (len < 0) 1116 return; 1117 1118 if (len == 0) { 1119 if (bundle_eof && multilink_master) { 1120 notice("Last channel has disconnected"); 1121 mp_bundle_terminated(); 1122 return; 1123 } 1124 notice("Modem hangup"); 1125 hungup = 1; 1126 status = EXIT_HANGUP; 1127 lcp_lowerdown(0); /* serial link is no longer available */ 1128 link_terminated(0); 1129 return; 1130 } 1131 1132 if (len < PPP_HDRLEN) { 1133 dbglog("received short packet:%.*B", len, p); 1134 return; 1135 } 1136 1137 dump_packet("rcvd", p, len); 1138 if (snoop_recv_hook) snoop_recv_hook(p, len); 1139 1140 p += 2; /* Skip address and control */ 1141 GETSHORT(protocol, p); 1142 len -= PPP_HDRLEN; 1143 1144 /* 1145 * Toss all non-LCP packets unless LCP is OPEN. 1146 */ 1147 if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) { 1148 dbglog("Discarded non-LCP packet when LCP not open"); 1149 return; 1150 } 1151 1152 /* 1153 * Until we get past the authentication phase, toss all packets 1154 * except LCP, LQR and authentication packets. 1155 */ 1156 if (phase <= PHASE_AUTHENTICATE 1157 && !(protocol == PPP_LCP || protocol == PPP_LQR 1158 || protocol == PPP_PAP || protocol == PPP_CHAP || 1159 protocol == PPP_EAP)) { 1160 dbglog("discarding proto 0x%x in phase %d", 1161 protocol, phase); 1162 return; 1163 } 1164 1165 /* 1166 * Upcall the proper protocol input routine. 1167 */ 1168 for (i = 0; (protp = protocols[i]) != NULL; ++i) { 1169 if (protp->protocol == protocol && protp->enabled_flag) { 1170 (*protp->input)(0, p, len); 1171 return; 1172 } 1173 if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag 1174 && protp->datainput != NULL) { 1175 (*protp->datainput)(0, p, len); 1176 return; 1177 } 1178 } 1179 1180 if (debug) { 1181 const char *pname = protocol_name(protocol); 1182 if (pname != NULL) 1183 warn("Unsupported protocol '%s' (0x%x) received", pname, protocol); 1184 else 1185 warn("Unsupported protocol 0x%x received", protocol); 1186 } 1187 lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN); 1188} 1189 1190/* 1191 * ppp_send_config - configure the transmit-side characteristics of 1192 * the ppp interface. Returns -1, indicating an error, if the channel 1193 * send_config procedure called error() (or incremented error_count 1194 * itself), otherwise 0. 1195 */ 1196int 1197ppp_send_config(unit, mtu, accm, pcomp, accomp) 1198 int unit, mtu; 1199 u_int32_t accm; 1200 int pcomp, accomp; 1201{ 1202 int errs; 1203 1204 if (the_channel->send_config == NULL) 1205 return 0; 1206 errs = error_count; 1207 (*the_channel->send_config)(mtu, accm, pcomp, accomp); 1208 return (error_count != errs)? -1: 0; 1209} 1210 1211/* 1212 * ppp_recv_config - configure the receive-side characteristics of 1213 * the ppp interface. Returns -1, indicating an error, if the channel 1214 * recv_config procedure called error() (or incremented error_count 1215 * itself), otherwise 0. 1216 */ 1217int 1218ppp_recv_config(unit, mru, accm, pcomp, accomp) 1219 int unit, mru; 1220 u_int32_t accm; 1221 int pcomp, accomp; 1222{ 1223 int errs; 1224 1225 if (the_channel->recv_config == NULL) 1226 return 0; 1227 errs = error_count; 1228 (*the_channel->recv_config)(mru, accm, pcomp, accomp); 1229 return (error_count != errs)? -1: 0; 1230} 1231 1232/* 1233 * new_phase - signal the start of a new phase of pppd's operation. 1234 */ 1235void 1236new_phase(p) 1237 int p; 1238{ 1239 phase = p; 1240 if (new_phase_hook) 1241 (*new_phase_hook)(p); 1242 notify(phasechange, p); 1243} 1244 1245/* 1246 * die - clean up state and exit with the specified status. 1247 */ 1248void 1249die(status) 1250 int status; 1251{ 1252 if (!doing_multilink || multilink_master) 1253 print_link_stats(); 1254 cleanup(); 1255 notify(exitnotify, status); 1256#if defined(USE_SYSLOG) /* foxconn wklin added, 08/13/2007 */ 1257 syslog(LOG_INFO, "Exit."); 1258#endif 1259 exit(status); 1260} 1261 1262/* 1263 * cleanup - restore anything which needs to be restored before we exit 1264 */ 1265/* ARGSUSED */ 1266static void 1267cleanup() 1268{ 1269 sys_cleanup(); 1270 1271 if (fd_ppp >= 0) 1272 the_channel->disestablish_ppp(devfd); 1273 if (the_channel->cleanup) 1274 (*the_channel->cleanup)(); 1275 remove_pidfiles(); 1276 1277#ifdef USE_TDB 1278 if (pppdb != NULL) 1279 cleanup_db(); 1280#endif 1281 1282} 1283 1284void 1285print_link_stats() 1286{ 1287 /* 1288 * Print connect time and statistics. 1289 */ 1290 if (link_stats_valid) { 1291 int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */ 1292 info("Connect time %d.%d minutes.", t/10, t%10); 1293 info("Sent %u bytes, received %u bytes.", 1294 link_stats.bytes_out, link_stats.bytes_in); 1295 link_stats_valid = 0; 1296 } 1297} 1298 1299/* 1300 * reset_link_stats - "reset" stats when link goes up. 1301 */ 1302void 1303reset_link_stats(u) 1304 int u; 1305{ 1306 if (!get_ppp_stats(u, &old_link_stats)) 1307 return; 1308 gettimeofday(&start_time, NULL); 1309} 1310 1311/* 1312 * update_link_stats - get stats at link termination. 1313 */ 1314void 1315update_link_stats(u) 1316 int u; 1317{ 1318 struct timeval now; 1319 char numbuf[32]; 1320 1321 if (!get_ppp_stats(u, &link_stats) 1322 || gettimeofday(&now, NULL) < 0) 1323 return; 1324 link_connect_time = now.tv_sec - start_time.tv_sec; 1325 link_stats_valid = 1; 1326 1327 link_stats.bytes_in -= old_link_stats.bytes_in; 1328 link_stats.bytes_out -= old_link_stats.bytes_out; 1329 link_stats.pkts_in -= old_link_stats.pkts_in; 1330 link_stats.pkts_out -= old_link_stats.pkts_out; 1331 1332 slprintf(numbuf, sizeof(numbuf), "%u", link_connect_time); 1333 script_setenv("CONNECT_TIME", numbuf, 0); 1334 slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_out); 1335 script_setenv("BYTES_SENT", numbuf, 0); 1336 slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_in); 1337 script_setenv("BYTES_RCVD", numbuf, 0); 1338} 1339 1340 1341struct callout { 1342 struct timeval c_time; /* time at which to call routine */ 1343 void *c_arg; /* argument to routine */ 1344 void (*c_func) __P((void *)); /* routine */ 1345 struct callout *c_next; 1346}; 1347 1348static struct callout *callout = NULL; /* Callout list */ 1349static struct timeval timenow; /* Current time */ 1350 1351/* 1352 * timeout - Schedule a timeout. 1353 */ 1354void 1355timeout(func, arg, secs, usecs) 1356 void (*func) __P((void *)); 1357 void *arg; 1358 int secs, usecs; 1359{ 1360 struct callout *newp, *p, **pp; 1361 1362 /* 1363 * Allocate timeout. 1364 */ 1365 if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL) 1366 fatal("Out of memory in timeout()!"); 1367 newp->c_arg = arg; 1368 newp->c_func = func; 1369 gettimeofday(&timenow, NULL); 1370 newp->c_time.tv_sec = timenow.tv_sec + secs; 1371 newp->c_time.tv_usec = timenow.tv_usec + usecs; 1372 if (newp->c_time.tv_usec >= 1000000) { 1373 newp->c_time.tv_sec += newp->c_time.tv_usec / 1000000; 1374 newp->c_time.tv_usec %= 1000000; 1375 } 1376 1377 /* 1378 * Find correct place and link it in. 1379 */ 1380 for (pp = &callout; (p = *pp); pp = &p->c_next) 1381 if (newp->c_time.tv_sec < p->c_time.tv_sec 1382 || (newp->c_time.tv_sec == p->c_time.tv_sec 1383 && newp->c_time.tv_usec < p->c_time.tv_usec)) 1384 break; 1385 newp->c_next = p; 1386 *pp = newp; 1387} 1388 1389 1390/* 1391 * untimeout - Unschedule a timeout. 1392 */ 1393void 1394untimeout(func, arg) 1395 void (*func) __P((void *)); 1396 void *arg; 1397{ 1398 struct callout **copp, *freep; 1399 1400 /* 1401 * Find first matching timeout and remove it from the list. 1402 */ 1403 for (copp = &callout; (freep = *copp); copp = &freep->c_next) 1404 if (freep->c_func == func && freep->c_arg == arg) { 1405 *copp = freep->c_next; 1406 free((char *) freep); 1407 break; 1408 } 1409} 1410 1411 1412/* 1413 * calltimeout - Call any timeout routines which are now due. 1414 */ 1415static void 1416calltimeout() 1417{ 1418 struct callout *p; 1419 1420 while (callout != NULL) { 1421 p = callout; 1422 1423 if (gettimeofday(&timenow, NULL) < 0) 1424 fatal("Failed to get time of day: %m"); 1425 if (!(p->c_time.tv_sec < timenow.tv_sec 1426 || (p->c_time.tv_sec == timenow.tv_sec 1427 && p->c_time.tv_usec <= timenow.tv_usec))) 1428 break; /* no, it's not time yet */ 1429 1430 callout = p->c_next; 1431 (*p->c_func)(p->c_arg); 1432 1433 free((char *) p); 1434 } 1435} 1436 1437 1438/* 1439 * timeleft - return the length of time until the next timeout is due. 1440 */ 1441static struct timeval * 1442timeleft(tvp) 1443 struct timeval *tvp; 1444{ 1445 if (callout == NULL) 1446 return NULL; 1447 1448 gettimeofday(&timenow, NULL); 1449 tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec; 1450 tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec; 1451 if (tvp->tv_usec < 0) { 1452 tvp->tv_usec += 1000000; 1453 tvp->tv_sec -= 1; 1454 } 1455 if (tvp->tv_sec < 0) 1456 tvp->tv_sec = tvp->tv_usec = 0; 1457 1458 return tvp; 1459} 1460 1461 1462/* 1463 * kill_my_pg - send a signal to our process group, and ignore it ourselves. 1464 * We assume that sig is currently blocked. 1465 */ 1466static void 1467kill_my_pg(sig) 1468 int sig; 1469{ 1470 struct sigaction act, oldact; 1471 1472 sigemptyset(&act.sa_mask); /* unnecessary in fact */ 1473 act.sa_handler = SIG_IGN; 1474 act.sa_flags = 0; 1475 kill(0, sig); 1476 /* 1477 * The kill() above made the signal pending for us, as well as 1478 * the rest of our process group, but we don't want it delivered 1479 * to us. It is blocked at the moment. Setting it to be ignored 1480 * will cause the pending signal to be discarded. If we did the 1481 * kill() after setting the signal to be ignored, it is unspecified 1482 * (by POSIX) whether the signal is immediately discarded or left 1483 * pending, and in fact Linux would leave it pending, and so it 1484 * would be delivered after the current signal handler exits, 1485 * leading to an infinite loop. 1486 */ 1487 sigaction(sig, &act, &oldact); 1488 sigaction(sig, &oldact, NULL); 1489} 1490 1491 1492/* 1493 * hup - Catch SIGHUP signal. 1494 * 1495 * Indicates that the physical layer has been disconnected. 1496 * We don't rely on this indication; if the user has sent this 1497 * signal, we just take the link down. 1498 */ 1499static void 1500hup(sig) 1501 int sig; 1502{ 1503 /* can't log a message here, it can deadlock */ 1504 got_sighup = 1; 1505 /* Foxconn removed start Winster Chan 12/23/2005 */ 1506#if 0 1507 if (conn_running) 1508 /* Send the signal to the [dis]connector process(es) also */ 1509 kill_my_pg(sig); 1510#endif 1511 /* Foxconn removed end Winster Chan 12/23/2005 */ 1512 notify(sigreceived, sig); 1513 if (waiting) 1514 siglongjmp(sigjmp, 1); 1515} 1516 1517 1518/* 1519 * term - Catch SIGTERM signal and SIGINT signal (^C/del). 1520 * 1521 * Indicates that we should initiate a graceful disconnect and exit. 1522 */ 1523/*ARGSUSED*/ 1524static void 1525term(sig) 1526 int sig; 1527{ 1528 /* can't log a message here, it can deadlock */ 1529 got_sigterm = sig; 1530 /* Foxconn removed start Winster Chan 12/23/2005 */ 1531#if 0 1532 if (conn_running) 1533 /* Send the signal to the [dis]connector process(es) also */ 1534 kill_my_pg(sig); 1535#endif 1536 /* Foxconn removed end Winster Chan 12/23/2005 */ 1537 notify(sigreceived, sig); 1538 if (waiting) 1539 siglongjmp(sigjmp, 1); 1540} 1541 1542 1543/* 1544 * chld - Catch SIGCHLD signal. 1545 * Sets a flag so we will call reap_kids in the mainline. 1546 */ 1547static void 1548chld(sig) 1549 int sig; 1550{ 1551 got_sigchld = 1; 1552 if (waiting) 1553 siglongjmp(sigjmp, 1); 1554} 1555 1556 1557/* 1558 * toggle_debug - Catch SIGUSR1 signal. 1559 * 1560 * Toggle debug flag. 1561 */ 1562/*ARGSUSED*/ 1563static void 1564toggle_debug(sig) 1565 int sig; 1566{ 1567 /* Foxconn modified start Winster Chan 12/23/2005 */ 1568#if 0 1569 debug = !debug; 1570 if (debug) { 1571 setlogmask(LOG_UPTO(LOG_DEBUG)); 1572 } else { 1573 setlogmask(LOG_UPTO(LOG_WARNING)); 1574 } 1575#else 1576 info("Disconnect on signal %d.", sig); 1577 got_sigusr1 = 1; 1578 notify(sigreceived, sig); 1579 if (waiting) 1580 siglongjmp(sigjmp, 1); 1581#endif 1582 /* Foxconn modified end Winster Chan 12/23/2005 */ 1583} 1584 1585 1586/* 1587 * open_ccp - Catch SIGUSR2 signal. 1588 * 1589 * Try to (re)negotiate compression. 1590 */ 1591/*ARGSUSED*/ 1592static void 1593open_ccp(sig) 1594 int sig; 1595{ 1596 /* Foxconn modified start Winster Chan 12/23/2005 */ 1597#if 0 1598 got_sigusr2 = 1; 1599 if (waiting) 1600 siglongjmp(sigjmp, 1); 1601#else 1602 info("Connect on signal %d.", sig); 1603 got_sigusr2 = 1; 1604 notify(sigreceived, sig); 1605 if (waiting) 1606 siglongjmp(sigjmp, 1); 1607#endif 1608 /* Foxconn modified end Winster Chan 12/23/2005 */ 1609} 1610 1611 1612/* 1613 * bad_signal - We've caught a fatal signal. Clean up state and exit. 1614 */ 1615static void 1616bad_signal(sig) 1617 int sig; 1618{ 1619 static int crashed = 0; 1620 1621 if (crashed) 1622 _exit(127); 1623 crashed = 1; 1624 error("Fatal signal %d", sig); 1625 if (conn_running) 1626 kill_my_pg(SIGTERM); 1627 notify(sigreceived, sig); 1628 die(127); 1629} 1630 1631/* 1632 * safe_fork - Create a child process. The child closes all the 1633 * file descriptors that we don't want to leak to a script. 1634 * The parent waits for the child to do this before returning. 1635 * This also arranges for the specified fds to be dup'd to 1636 * fds 0, 1, 2 in the child. 1637 */ 1638pid_t 1639safe_fork(int infd, int outfd, int errfd) 1640{ 1641 pid_t pid; 1642 int fd, pipefd[2]; 1643 char buf[1]; 1644 1645 /* make sure fds 0, 1, 2 are occupied (probably not necessary) */ 1646 while ((fd = dup(fd_devnull)) >= 0) { 1647 if (fd > 2) { 1648 close(fd); 1649 break; 1650 } 1651 } 1652 1653 if (pipe(pipefd) == -1) 1654 pipefd[0] = pipefd[1] = -1; 1655 pid = fork(); 1656 if (pid < 0) { 1657 error("fork failed: %m"); 1658 return -1; 1659 } 1660 if (pid > 0) { 1661 /* parent */ 1662 close(pipefd[1]); 1663 /* this read() blocks until the close(pipefd[1]) below */ 1664 complete_read(pipefd[0], buf, 1); 1665 close(pipefd[0]); 1666 return pid; 1667 } 1668 1669 /* Executing in the child */ 1670 sys_close(); 1671#ifdef USE_TDB 1672 tdb_close(pppdb); 1673#endif 1674 1675 /* make sure infd, outfd and errfd won't get tromped on below */ 1676 if (infd == 1 || infd == 2) 1677 infd = dup(infd); 1678 if (outfd == 0 || outfd == 2) 1679 outfd = dup(outfd); 1680 if (errfd == 0 || errfd == 1) 1681 errfd = dup(errfd); 1682 1683 /* dup the in, out, err fds to 0, 1, 2 */ 1684 if (infd != 0) 1685 dup2(infd, 0); 1686 if (outfd != 1) 1687 dup2(outfd, 1); 1688 if (errfd != 2) 1689 dup2(errfd, 2); 1690 1691 closelog(); 1692 if (log_to_fd > 2) 1693 close(log_to_fd); 1694 if (the_channel->close) 1695 (*the_channel->close)(); 1696 else 1697 close(devfd); /* some plugins don't have a close function */ 1698 close(fd_ppp); 1699 close(fd_devnull); 1700 if (infd != 0) 1701 close(infd); 1702 if (outfd != 1) 1703 close(outfd); 1704 if (errfd != 2) 1705 close(errfd); 1706 1707 notify(fork_notifier, 0); 1708 close(pipefd[0]); 1709 /* this close unblocks the read() call above in the parent */ 1710 close(pipefd[1]); 1711 1712 return 0; 1713} 1714 1715/* 1716 * device_script - run a program to talk to the specified fds 1717 * (e.g. to run the connector or disconnector script). 1718 * stderr gets connected to the log fd or to the _PATH_CONNERRS file. 1719 */ 1720int 1721device_script(program, in, out, dont_wait) 1722 char *program; 1723 int in, out; 1724 int dont_wait; 1725{ 1726 int pid; 1727 int status = -1; 1728 int errfd; 1729 1730 if (log_to_fd >= 0) 1731 errfd = log_to_fd; 1732 else 1733 errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0600); 1734 1735 ++conn_running; 1736 pid = safe_fork(in, out, errfd); 1737 1738 if (pid != 0 && log_to_fd < 0) 1739 close(errfd); 1740 1741 if (pid < 0) { 1742 --conn_running; 1743 error("Failed to create child process: %m"); 1744 return -1; 1745 } 1746 1747 if (pid != 0) { 1748 if (dont_wait) { 1749 record_child(pid, program, NULL, NULL); 1750 status = 0; 1751 } else { 1752 while (waitpid(pid, &status, 0) < 0) { 1753 if (errno == EINTR) 1754 continue; 1755 fatal("error waiting for (dis)connection process: %m"); 1756 } 1757 --conn_running; 1758 } 1759 return (status == 0 ? 0 : -1); 1760 } 1761 1762 /* here we are executing in the child */ 1763 1764 setgid(getgid()); 1765 setuid(uid); 1766 if (getuid() != uid) { 1767 fprintf(stderr, "pppd: setuid failed\n"); 1768 exit(1); 1769 } 1770 execl("/bin/sh", "sh", "-c", program, (char *)0); 1771 perror("pppd: could not exec /bin/sh"); 1772 exit(99); 1773 /* NOTREACHED */ 1774} 1775 1776 1777/* 1778 * run-program - execute a program with given arguments, 1779 * but don't wait for it unless wait is non-zero. 1780 * If the program can't be executed, logs an error unless 1781 * must_exist is 0 and the program file doesn't exist. 1782 * Returns -1 if it couldn't fork, 0 if the file doesn't exist 1783 * or isn't an executable plain file, or the process ID of the child. 1784 * If done != NULL, (*done)(arg) will be called later (within 1785 * reap_kids) iff the return value is > 0. 1786 */ 1787pid_t 1788run_program(prog, args, must_exist, done, arg, wait) 1789 char *prog; 1790 char **args; 1791 int must_exist; 1792 void (*done) __P((void *)); 1793 void *arg; 1794 int wait; 1795{ 1796 int pid, status; 1797 struct stat sbuf; 1798 1799 /* 1800 * First check if the file exists and is executable. 1801 * We don't use access() because that would use the 1802 * real user-id, which might not be root, and the script 1803 * might be accessible only to root. 1804 */ 1805 errno = EINVAL; 1806 if (stat(prog, &sbuf) < 0 || !S_ISREG(sbuf.st_mode) 1807 || (sbuf.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0) { 1808 if (must_exist || errno != ENOENT) 1809 warn("Can't execute %s: %m", prog); 1810 return 0; 1811 } 1812 1813 pid = safe_fork(fd_devnull, fd_devnull, fd_devnull); 1814 if (pid == -1) { 1815 error("Failed to create child process for %s: %m", prog); 1816 return -1; 1817 } 1818 if (pid != 0) { 1819 if (debug) 1820 dbglog("Script %s started (pid %d)", prog, pid); 1821 record_child(pid, prog, done, arg); 1822 if (wait) { 1823 while (waitpid(pid, &status, 0) < 0) { 1824 if (errno == EINTR) 1825 continue; 1826 fatal("error waiting for script %s: %m", prog); 1827 } 1828 forget_child(pid, status); 1829 } 1830 return pid; 1831 } 1832 1833 /* Leave the current location */ 1834 (void) setsid(); /* No controlling tty. */ 1835 (void) umask (S_IRWXG|S_IRWXO); 1836 (void) chdir ("/"); /* no current directory. */ 1837 setuid(0); /* set real UID = root */ 1838 setgid(getegid()); 1839 1840#ifdef BSD 1841 /* Force the priority back to zero if pppd is running higher. */ 1842 if (setpriority (PRIO_PROCESS, 0, 0) < 0) 1843 warn("can't reset priority to 0: %m"); 1844#endif 1845 1846 /* run the program */ 1847 execve(prog, args, script_env); 1848 if (must_exist || errno != ENOENT) { 1849 /* have to reopen the log, there's nowhere else 1850 for the message to go. */ 1851 reopen_log(); 1852#if defined(USE_SYSLOG) /* foxconn wklin added, 08/13/2007 */ 1853 syslog(LOG_ERR, "Can't execute %s: %m", prog); 1854#endif 1855 closelog(); 1856 } 1857 _exit(-1); 1858} 1859 1860 1861/* 1862 * record_child - add a child process to the list for reap_kids 1863 * to use. 1864 */ 1865void 1866record_child(pid, prog, done, arg) 1867 int pid; 1868 char *prog; 1869 void (*done) __P((void *)); 1870 void *arg; 1871{ 1872 struct subprocess *chp; 1873 1874 ++n_children; 1875 1876 chp = (struct subprocess *) malloc(sizeof(struct subprocess)); 1877 if (chp == NULL) { 1878 warn("losing track of %s process", prog); 1879 } else { 1880 chp->pid = pid; 1881 chp->prog = prog; 1882 chp->done = done; 1883 chp->arg = arg; 1884 chp->next = children; 1885 children = chp; 1886 } 1887} 1888 1889/* 1890 * childwait_end - we got fed up waiting for the child processes to 1891 * exit, send them all a SIGTERM. 1892 */ 1893static void 1894childwait_end(arg) 1895 void *arg; 1896{ 1897 struct subprocess *chp; 1898 1899 for (chp = children; chp != NULL; chp = chp->next) { 1900 if (debug) 1901 dbglog("sending SIGTERM to process %d", chp->pid); 1902 kill(chp->pid, SIGTERM); 1903 } 1904 childwait_done = 1; 1905} 1906 1907/* 1908 * forget_child - clean up after a dead child 1909 */ 1910static void 1911forget_child(pid, status) 1912 int pid, status; 1913{ 1914 struct subprocess *chp, **prevp; 1915 1916 for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next) { 1917 if (chp->pid == pid) { 1918 --n_children; 1919 *prevp = chp->next; 1920 break; 1921 } 1922 } 1923 if (WIFSIGNALED(status)) { 1924 warn("Child process %s (pid %d) terminated with signal %d", 1925 (chp? chp->prog: "??"), pid, WTERMSIG(status)); 1926 } else if (debug) 1927 dbglog("Script %s finished (pid %d), status = 0x%x", 1928 (chp? chp->prog: "??"), pid, 1929 WIFEXITED(status) ? WEXITSTATUS(status) : status); 1930 if (chp && chp->done) 1931 (*chp->done)(chp->arg); 1932 if (chp) 1933 free(chp); 1934} 1935 1936/* 1937 * reap_kids - get status from any dead child processes, 1938 * and log a message for abnormal terminations. 1939 */ 1940static int 1941reap_kids() 1942{ 1943 int pid, status; 1944 1945 if (n_children == 0) 1946 return 0; 1947 while ((pid = waitpid(-1, &status, WNOHANG)) != -1 && pid != 0) { 1948 forget_child(pid, status); 1949 } 1950 if (pid == -1) { 1951 if (errno == ECHILD) 1952 return -1; 1953 if (errno != EINTR) 1954 error("Error waiting for child process: %m"); 1955 } 1956 return 0; 1957} 1958 1959/* 1960 * add_notifier - add a new function to be called when something happens. 1961 */ 1962void 1963add_notifier(notif, func, arg) 1964 struct notifier **notif; 1965 notify_func func; 1966 void *arg; 1967{ 1968 struct notifier *np; 1969 1970 np = malloc(sizeof(struct notifier)); 1971 if (np == 0) 1972 novm("notifier struct"); 1973 np->next = *notif; 1974 np->func = func; 1975 np->arg = arg; 1976 *notif = np; 1977} 1978 1979/* 1980 * remove_notifier - remove a function from the list of things to 1981 * be called when something happens. 1982 */ 1983void 1984remove_notifier(notif, func, arg) 1985 struct notifier **notif; 1986 notify_func func; 1987 void *arg; 1988{ 1989 struct notifier *np; 1990 1991 for (; (np = *notif) != 0; notif = &np->next) { 1992 if (np->func == func && np->arg == arg) { 1993 *notif = np->next; 1994 free(np); 1995 break; 1996 } 1997 } 1998} 1999 2000/* 2001 * notify - call a set of functions registered with add_notifier. 2002 */ 2003void 2004notify(notif, val) 2005 struct notifier *notif; 2006 int val; 2007{ 2008 struct notifier *np; 2009 2010 while ((np = notif) != 0) { 2011 notif = np->next; 2012 (*np->func)(np->arg, val); 2013 } 2014} 2015 2016/* 2017 * novm - log an error message saying we ran out of memory, and die. 2018 */ 2019void 2020novm(msg) 2021 char *msg; 2022{ 2023 fatal("Virtual memory exhausted allocating %s\n", msg); 2024} 2025 2026/* 2027 * script_setenv - set an environment variable value to be used 2028 * for scripts that we run (e.g. ip-up, auth-up, etc.) 2029 */ 2030void 2031script_setenv(var, value, iskey) 2032 char *var, *value; 2033 int iskey; 2034{ 2035 size_t varl = strlen(var); 2036 size_t vl = varl + strlen(value) + 2; 2037 int i; 2038 char *p, *newstring; 2039 2040 newstring = (char *) malloc(vl+1); 2041 if (newstring == 0) 2042 return; 2043 *newstring++ = iskey; 2044 slprintf(newstring, vl, "%s=%s", var, value); 2045 2046 /* check if this variable is already set */ 2047 if (script_env != 0) { 2048 for (i = 0; (p = script_env[i]) != 0; ++i) { 2049 if (strncmp(p, var, varl) == 0 && p[varl] == '=') { 2050#ifdef USE_TDB 2051 if (p[-1] && pppdb != NULL) 2052 delete_db_key(p); 2053#endif 2054 free(p-1); 2055 script_env[i] = newstring; 2056#ifdef USE_TDB 2057 if (iskey && pppdb != NULL) 2058 add_db_key(newstring); 2059 update_db_entry(); 2060#endif 2061 return; 2062 } 2063 } 2064 } else { 2065 /* no space allocated for script env. ptrs. yet */ 2066 i = 0; 2067 script_env = (char **) malloc(16 * sizeof(char *)); 2068 if (script_env == 0) 2069 return; 2070 s_env_nalloc = 16; 2071 } 2072 2073 /* reallocate script_env with more space if needed */ 2074 if (i + 1 >= s_env_nalloc) { 2075 int new_n = i + 17; 2076 char **newenv = (char **) realloc((void *)script_env, 2077 new_n * sizeof(char *)); 2078 if (newenv == 0) 2079 return; 2080 script_env = newenv; 2081 s_env_nalloc = new_n; 2082 } 2083 2084 script_env[i] = newstring; 2085 script_env[i+1] = 0; 2086 2087#ifdef USE_TDB 2088 if (pppdb != NULL) { 2089 if (iskey) 2090 add_db_key(newstring); 2091 update_db_entry(); 2092 } 2093#endif 2094} 2095 2096/* 2097 * script_unsetenv - remove a variable from the environment 2098 * for scripts. 2099 */ 2100void 2101script_unsetenv(var) 2102 char *var; 2103{ 2104 int vl = strlen(var); 2105 int i; 2106 char *p; 2107 2108 if (script_env == 0) 2109 return; 2110 for (i = 0; (p = script_env[i]) != 0; ++i) { 2111 if (strncmp(p, var, vl) == 0 && p[vl] == '=') { 2112#ifdef USE_TDB 2113 if (p[-1] && pppdb != NULL) 2114 delete_db_key(p); 2115#endif 2116 free(p-1); 2117 while ((script_env[i] = script_env[i+1]) != 0) 2118 ++i; 2119 break; 2120 } 2121 } 2122#ifdef USE_TDB 2123 if (pppdb != NULL) 2124 update_db_entry(); 2125#endif 2126} 2127 2128/* 2129 * Any arbitrary string used as a key for locking the database. 2130 * It doesn't matter what it is as long as all pppds use the same string. 2131 */ 2132#define PPPD_LOCK_KEY "pppd lock" 2133 2134/* 2135 * lock_db - get an exclusive lock on the TDB database. 2136 * Used to ensure atomicity of various lookup/modify operations. 2137 */ 2138void lock_db() 2139{ 2140#ifdef USE_TDB 2141 TDB_DATA key; 2142 2143 key.dptr = PPPD_LOCK_KEY; 2144 key.dsize = strlen(key.dptr); 2145 tdb_chainlock(pppdb, key); 2146#endif 2147} 2148 2149/* 2150 * unlock_db - remove the exclusive lock obtained by lock_db. 2151 */ 2152void unlock_db() 2153{ 2154#ifdef USE_TDB 2155 TDB_DATA key; 2156 2157 key.dptr = PPPD_LOCK_KEY; 2158 key.dsize = strlen(key.dptr); 2159 tdb_chainunlock(pppdb, key); 2160#endif 2161} 2162 2163#ifdef USE_TDB 2164/* 2165 * update_db_entry - update our entry in the database. 2166 */ 2167static void 2168update_db_entry() 2169{ 2170 TDB_DATA key, dbuf; 2171 int vlen, i; 2172 char *p, *q, *vbuf; 2173 2174 if (script_env == NULL) 2175 return; 2176 vlen = 0; 2177 for (i = 0; (p = script_env[i]) != 0; ++i) 2178 vlen += strlen(p) + 1; 2179 vbuf = malloc(vlen + 1); 2180 if (vbuf == 0) 2181 novm("database entry"); 2182 q = vbuf; 2183 for (i = 0; (p = script_env[i]) != 0; ++i) 2184 q += slprintf(q, vbuf + vlen - q, "%s;", p); 2185 2186 key.dptr = db_key; 2187 key.dsize = strlen(db_key); 2188 dbuf.dptr = vbuf; 2189 dbuf.dsize = vlen; 2190 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE)) 2191 error("tdb_store failed: %s", tdb_error(pppdb)); 2192 2193 if (vbuf) 2194 free(vbuf); 2195 2196} 2197 2198/* 2199 * add_db_key - add a key that we can use to look up our database entry. 2200 */ 2201static void 2202add_db_key(str) 2203 const char *str; 2204{ 2205 TDB_DATA key, dbuf; 2206 2207 key.dptr = (char *) str; 2208 key.dsize = strlen(str); 2209 dbuf.dptr = db_key; 2210 dbuf.dsize = strlen(db_key); 2211 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE)) 2212 error("tdb_store key failed: %s", tdb_error(pppdb)); 2213} 2214 2215/* 2216 * delete_db_key - delete a key for looking up our database entry. 2217 */ 2218static void 2219delete_db_key(str) 2220 const char *str; 2221{ 2222 TDB_DATA key; 2223 2224 key.dptr = (char *) str; 2225 key.dsize = strlen(str); 2226 tdb_delete(pppdb, key); 2227} 2228 2229/* 2230 * cleanup_db - delete all the entries we put in the database. 2231 */ 2232static void 2233cleanup_db() 2234{ 2235 TDB_DATA key; 2236 int i; 2237 char *p; 2238 2239 key.dptr = db_key; 2240 key.dsize = strlen(db_key); 2241 tdb_delete(pppdb, key); 2242 for (i = 0; (p = script_env[i]) != 0; ++i) 2243 if (p[-1]) 2244 delete_db_key(p); 2245} 2246#endif /* USE_TDB */ 2247