2 * main.c - Point-to-Point Protocol main module
4 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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
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
25 * Pittsburgh, PA 15213-3890
26 * (412) 268-4387, fax: (412) 268-7395
27 * tech-transfer@andrew.cmu.edu
29 * 4. Redistributions of any form whatsoever must retain the following
31 * "This product includes software developed by Computing Services
32 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
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.
42 * Copyright (c) 1999-2004 Paul Mackerras. All rights reserved.
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
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.
55 * 3. Redistributions of any form whatsoever must retain the following
57 * "This product includes software developed by Paul Mackerras
58 * <paulus@samba.org>".
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.
69 #define RCSID "$Id: main.c,v 1.156 2008/06/23 11:47:18 paulus Exp $"
83 #include <sys/param.h>
84 #include <sys/types.h>
87 #include <sys/resource.h>
89 #include <sys/socket.h>
90 #include <netinet/in.h>
91 #include <arpa/inet.h>
102 #include "chap-new.h"
106 #include "pathnames.h"
118 #endif /* IPX_CHANGE */
125 char ifname[MAXIFNAMELEN]; /* Interface name */
126 int ifunit; /* Interface unit number */
128 struct channel *the_channel;
130 char *progname; /* Name of this program */
131 char hostname[MAXNAMELEN]; /* Our hostname */
132 static char pidfilename[MAXPATHLEN]; /* name of pid file */
133 static char linkpidfile[MAXPATHLEN]; /* name of linkname pid file */
134 char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */
135 uid_t uid; /* Our real user-id */
136 struct notifier *pidchange = NULL;
137 struct notifier *phasechange = NULL;
138 struct notifier *exitnotify = NULL;
139 struct notifier *sigreceived = NULL;
140 struct notifier *fork_notifier = NULL;
142 int hungup; /* terminal has been hung up */
143 int privileged; /* we're running as real uid root */
144 int need_holdoff; /* need holdoff period before restarting */
145 int detached; /* have detached from terminal */
146 volatile int status; /* exit status for pppd */
147 int unsuccess; /* # unsuccessful connection attempts */
148 int do_callback; /* != 0 if we should do callback next */
149 int doing_callback; /* != 0 if we are doing callback */
150 int ppp_session_number; /* Session number, for channels with such a
151 concept (eg PPPoE) */
152 int childwait_done; /* have timed out waiting for children */
155 TDB_CONTEXT *pppdb; /* database for storing status etc. */
160 int (*holdoff_hook) __P((void)) = NULL;
161 int (*new_phase_hook) __P((int)) = NULL;
162 void (*snoop_recv_hook) __P((unsigned char *p, int len)) = NULL;
163 void (*snoop_send_hook) __P((unsigned char *p, int len)) = NULL;
165 static int conn_running; /* we have a [dis]connector running */
166 static int fd_loop; /* fd for getting demand-dial packets */
168 int fd_devnull; /* fd for /dev/null */
169 int devfd = -1; /* fd of underlying device */
170 int fd_ppp = -1; /* fd for talking PPP */
171 int phase; /* where the link is at */
180 static sigset_t signals_handled;
182 static int sigpipe[2];
184 char **script_env; /* Env. variable values for scripts */
185 int s_env_nalloc; /* # words avail at script_env */
187 u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */
188 u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */
190 static int n_children; /* # child processes still running */
191 static int got_sigchld; /* set if we have received a SIGCHLD */
193 int privopen; /* don't lock, open device as root */
195 char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n";
197 GIDSET_TYPE groups[NGROUPS_MAX];/* groups the user is in */
198 int ngroups; /* How many groups valid in groups */
200 static struct timeval start_time; /* Time when link was started. */
202 static struct pppd_stats old_link_stats;
203 struct pppd_stats link_stats;
204 unsigned link_connect_time;
205 int link_stats_valid;
210 bool bundle_terminating;
213 * We maintain a list of child process pids and
214 * functions to call when they exit.
219 void (*done) __P((void *));
222 struct subprocess *next;
225 static struct subprocess *children;
227 /* Prototypes for procedures local to this file. */
229 static void setup_signals __P((void));
230 static void create_pidfile __P((int pid));
231 static void create_linkpidfile __P((int pid));
232 static void cleanup __P((void));
233 static void get_input __P((void));
234 static void calltimeout __P((void));
235 static struct timeval *timeleft __P((struct timeval *));
236 static void kill_my_pg __P((int));
237 static void hup __P((int));
238 static void term __P((int));
239 static void chld __P((int));
240 static void toggle_debug __P((int));
241 static void open_ccp __P((int));
242 static void bad_signal __P((int));
243 static void holdoff_end __P((void *));
244 static void forget_child __P((int pid, int status));
245 static int reap_kids __P((void));
246 static void childwait_end __P((void *));
249 static void update_db_entry __P((void));
250 static void add_db_key __P((const char *));
251 static void delete_db_key __P((const char *));
252 static void cleanup_db __P((void));
255 static void handle_events __P((void));
256 void print_link_stats __P((void));
258 extern char *getlogin __P((void));
259 int main __P((int, char *[]));
263 #define O_NONBLOCK O_NDELAY
267 #define setlogmask(x)
271 * PPP Data Link Layer "protocol" table.
272 * One entry per supported protocol.
273 * The last entry must be NULL.
275 struct protent *protocols[] = {
306 struct protent *protp;
309 link_stats_valid = 0;
310 new_phase(PHASE_INITIALIZE);
314 /* Initialize syslog facilities */
317 if (gethostname(hostname, MAXNAMELEN) < 0 ) {
318 option_error("Couldn't get hostname: %m");
321 hostname[MAXNAMELEN-1] = 0;
323 /* make sure we don't create world or group writable files. */
324 umask(umask(0777) | 022);
327 privileged = uid == 0;
328 slprintf(numbuf, sizeof(numbuf), "%d", uid);
329 script_setenv("ORIG_UID", numbuf, 0);
331 ngroups = getgroups(NGROUPS_MAX, groups);
334 * Initialize magic number generator now so that protocols may
335 * use magic numbers in initialization.
340 * Initialize each protocol.
342 for (i = 0; (protp = protocols[i]) != NULL; ++i)
346 * Initialize the default channel.
353 * Parse, in order, the system options file, the user's options file,
354 * and the command line arguments.
356 if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1)
357 || !options_from_user()
358 || !parse_args(argc-1, argv+1))
359 exit(EXIT_OPTION_ERROR);
360 devnam_fixed = 1; /* can no longer change device name */
363 * Work out the device name, if it hasn't already been specified,
364 * and parse the tty's options file.
366 if (the_channel->process_extra_options)
367 (*the_channel->process_extra_options)();
370 setlogmask(LOG_UPTO(LOG_DEBUG));
373 * Check that we are running as root.
375 if (geteuid() != 0) {
376 option_error("must be root to run %s, since it is not setuid-root",
381 if (!ppp_available()) {
382 option_error("%s", no_ppp_msg);
383 exit(EXIT_NO_KERNEL_SUPPORT);
387 * Check that the options given are valid and consistent.
390 if (!sys_check_options())
391 exit(EXIT_OPTION_ERROR);
392 auth_check_options();
393 #ifdef HAVE_MULTILINK
396 for (i = 0; (protp = protocols[i]) != NULL; ++i)
397 if (protp->check_options != NULL)
398 (*protp->check_options)();
399 if (the_channel->check_options)
400 (*the_channel->check_options)();
403 if (dump_options || dryrun) {
404 init_pr_log(NULL, LOG_INFO);
405 print_options(pr_log, NULL);
412 /* Make sure fds 0, 1, 2 are open to somewhere. */
413 fd_devnull = open(_PATH_DEVNULL, O_RDWR);
415 fatal("Couldn't open %s: %m", _PATH_DEVNULL);
416 while (fd_devnull <= 2) {
419 fatal("Critical shortage of file descriptors: dup failed: %m");
424 * Initialize system-dependent stuff.
429 pppdb = tdb_open(_PATH_PPPDB, 0, 0, O_RDWR|O_CREAT, 0644);
431 slprintf(db_key, sizeof(db_key), "pppd%d", getpid());
434 warn("Warning: couldn't open ppp database %s", _PATH_PPPDB);
436 warn("Warning: disabling multilink");
443 * Detach ourselves from the terminal, if required,
444 * and identify who is running us.
446 if (!nodetach && !updetach)
451 if (pw != NULL && pw->pw_name != NULL)
456 syslog(LOG_NOTICE, "pppd %s started by %s, uid %d", VERSION, p, uid);
457 script_setenv("PPPLOGNAME", p, 0);
460 script_setenv("DEVICE", devnam, 1);
461 slprintf(numbuf, sizeof(numbuf), "%d", getpid());
462 script_setenv("PPPD_PID", numbuf, 1);
466 create_linkpidfile(getpid());
471 * If we're doing dial-on-demand, set up the interface now.
475 * Open the loopback channel and set it up to be the ppp interface.
477 fd_loop = open_ppp_loopback();
480 * Configure the interface and mark it up, etc.
489 bundle_terminating = 0;
495 doing_callback = do_callback;
498 if (demand && !doing_callback) {
500 * Don't do anything until we see some activity.
502 new_phase(PHASE_DORMANT);
509 if (get_loop_output())
517 * Now we want to bring up the link.
520 info("Starting link");
523 get_time(&start_time);
524 script_unsetenv("CONNECT_TIME");
525 script_unsetenv("BYTES_SENT");
526 script_unsetenv("BYTES_RCVD");
528 lcp_open(0); /* Start protocol */
530 while (phase != PHASE_DEAD) {
534 lcp_close(0, "User request");
536 bundle_terminating = 1;
537 if (phase == PHASE_MASTER)
538 mp_bundle_terminated();
541 if (phase == PHASE_NETWORK || phase == PHASE_RUNNING) {
542 ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */
543 (*ccp_protent.open)(0);
547 /* restore FSMs to original state */
550 if (!persist || asked_to_quit || (maxfail > 0 && unsuccess >= maxfail))
555 t = need_holdoff? holdoff: 0;
557 t = (*holdoff_hook)();
559 new_phase(PHASE_HOLDOFF);
560 TIMEOUT(holdoff_end, NULL, t);
564 new_phase(PHASE_DORMANT); /* allow signal to end holdoff */
565 } while (phase == PHASE_HOLDOFF);
571 /* Wait for scripts to finish */
573 if (n_children > 0) {
575 TIMEOUT(childwait_end, NULL, child_wait);
577 struct subprocess *chp;
578 dbglog("Waiting for %d child processes...", n_children);
579 for (chp = children; chp != NULL; chp = chp->next)
580 dbglog(" script %s, pid %d", chp->prog, chp->pid);
582 while (n_children > 0 && !childwait_done) {
584 if (kill_link && !childwait_done)
594 * handle_events - wait for something to happen and respond to it.
600 unsigned char buf[16];
602 kill_link = open_ccp_flag = 0;
604 /* alert via signal pipe */
606 /* flush signal pipe */
607 for (; read(sigpipe[0], buf, sizeof(buf)) > 0; );
609 /* wait if necessary */
610 if (!(got_sighup || got_sigterm || got_sigusr2 || got_sigchld))
611 wait_input(timeleft(&timo));
613 remove_fd(sigpipe[0]);
617 info("Hangup (SIGHUP)");
620 if (status != EXIT_HANGUP)
621 status = EXIT_USER_REQUEST;
624 info("Terminating on signal %d", got_sigterm);
628 status = EXIT_USER_REQUEST;
633 reap_kids(); /* Don't leave dead kids lying around */
642 * setup_signals - initialize signal handling.
649 /* create pipe to wake up event handler from signal handler */
650 if (pipe(sigpipe) < 0)
651 fatal("Couldn't create signal pipe: %m");
652 fcntl(sigpipe[0], F_SETFD, fcntl(sigpipe[0], F_GETFD) | FD_CLOEXEC);
653 fcntl(sigpipe[1], F_SETFD, fcntl(sigpipe[1], F_GETFD) | FD_CLOEXEC);
654 fcntl(sigpipe[0], F_SETFL, fcntl(sigpipe[0], F_GETFL) | O_NONBLOCK);
655 fcntl(sigpipe[1], F_SETFL, fcntl(sigpipe[1], F_GETFL) | O_NONBLOCK);
658 * Compute mask of all interesting signals and install signal handlers
659 * for each. Only one signal handler may be active at a time. Therefore,
660 * all other signals should be masked when any handler is executing.
662 sigemptyset(&signals_handled);
663 sigaddset(&signals_handled, SIGHUP);
664 sigaddset(&signals_handled, SIGINT);
665 sigaddset(&signals_handled, SIGTERM);
666 sigaddset(&signals_handled, SIGCHLD);
667 sigaddset(&signals_handled, SIGUSR2);
669 #define SIGNAL(s, handler) do { \
670 sa.sa_handler = handler; \
671 if (sigaction(s, &sa, NULL) < 0) \
672 fatal("Couldn't establish signal handler (%d): %m", s); \
675 sa.sa_mask = signals_handled;
677 SIGNAL(SIGHUP, hup); /* Hangup */
678 SIGNAL(SIGINT, term); /* Interrupt */
679 SIGNAL(SIGTERM, term); /* Terminate */
680 SIGNAL(SIGCHLD, chld);
682 SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */
683 SIGNAL(SIGUSR2, open_ccp); /* Reopen CCP */
686 * Install a handler for other signals which would otherwise
687 * cause pppd to exit without cleaning up.
689 SIGNAL(SIGABRT, bad_signal);
690 SIGNAL(SIGALRM, bad_signal);
691 SIGNAL(SIGFPE, bad_signal);
692 SIGNAL(SIGILL, bad_signal);
693 SIGNAL(SIGPIPE, bad_signal);
694 SIGNAL(SIGQUIT, bad_signal);
695 SIGNAL(SIGSEGV, bad_signal);
697 SIGNAL(SIGBUS, bad_signal);
700 SIGNAL(SIGEMT, bad_signal);
703 SIGNAL(SIGPOLL, bad_signal);
706 SIGNAL(SIGPROF, bad_signal);
709 SIGNAL(SIGSYS, bad_signal);
712 SIGNAL(SIGTRAP, bad_signal);
715 SIGNAL(SIGVTALRM, bad_signal);
718 SIGNAL(SIGXCPU, bad_signal);
721 SIGNAL(SIGXFSZ, bad_signal);
725 * Apparently we can get a SIGPIPE when we call syslog, if
726 * syslogd has died and been restarted. Ignoring it seems
729 signal(SIGPIPE, SIG_IGN);
733 * set_ifunit - do things we need to do once we know which ppp
742 if (req_ifname[0] != '\0')
743 slprintf(ifname, sizeof(ifname), "%s", req_ifname);
745 slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
746 info("Using interface %s", ifname);
747 script_setenv("IFNAME", ifname, iskey);
748 slprintf(ifkey, sizeof(ifkey), "%d", ifunit);
749 script_setenv("UNIT", ifkey, iskey);
751 create_pidfile(getpid()); /* write pid to file */
752 create_linkpidfile(getpid());
757 * detach - detach us from the controlling terminal.
768 if (pipe(pipefd) == -1)
769 pipefd[0] = pipefd[1] = -1;
770 if ((pid = fork()) < 0) {
771 error("Couldn't detach (fork failed: %m)");
772 die(1); /* or just return? */
776 notify(pidchange, pid);
777 /* update pid files if they have been written already */
781 create_linkpidfile(pid);
782 exit(0); /* parent dies */
792 slprintf(numbuf, sizeof(numbuf), "%d", getpid());
793 script_setenv("PPPD_PID", numbuf, 1);
795 /* wait for parent to finish updating pid & lock files and die */
797 complete_read(pipefd[0], numbuf, 1);
802 * reopen_log - (re)open our connection to syslog.
807 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
808 setlogmask(LOG_UPTO(LOG_INFO));
812 * Create a file containing our process ID.
820 slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid",
821 _PATH_VARRUN, ifname);
822 if ((pidfile = fopen(pidfilename, "w")) != NULL) {
823 fprintf(pidfile, "%d\n", pid);
824 (void) fclose(pidfile);
826 error("Failed to create pid file %s: %m", pidfilename);
832 create_linkpidfile(pid)
837 if (linkname[0] == 0)
839 script_setenv("LINKNAME", linkname, 1);
840 slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid",
841 _PATH_VARRUN, linkname);
842 if ((pidfile = fopen(linkpidfile, "w")) != NULL) {
843 fprintf(pidfile, "%d\n", pid);
845 fprintf(pidfile, "%s\n", ifname);
846 (void) fclose(pidfile);
848 error("Failed to create pid file %s: %m", linkpidfile);
854 * remove_pidfile - remove our pid files
856 void remove_pidfiles()
858 if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT)
859 warn("unable to delete pid file %s: %m", pidfilename);
861 if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT)
862 warn("unable to delete pid file %s: %m", linkpidfile);
867 * holdoff_end - called via a timeout when the holdoff period ends.
873 new_phase(PHASE_DORMANT);
876 /* List of protocol names, to make our messages a little more informative. */
877 struct protocol_list {
880 } protocol_list[] = {
882 { 0x23, "OSI Network Layer" },
883 { 0x25, "Xerox NS IDP" },
884 { 0x27, "DECnet Phase IV" },
885 { 0x29, "Appletalk" },
886 { 0x2b, "Novell IPX" },
887 { 0x2d, "VJ compressed TCP/IP" },
888 { 0x2f, "VJ uncompressed TCP/IP" },
889 { 0x31, "Bridging PDU" },
890 { 0x33, "Stream Protocol ST-II" },
891 { 0x35, "Banyan Vines" },
892 { 0x39, "AppleTalk EDDP" },
893 { 0x3b, "AppleTalk SmartBuffered" },
894 { 0x3d, "Multi-Link" },
895 { 0x3f, "NETBIOS Framing" },
896 { 0x41, "Cisco Systems" },
897 { 0x43, "Ascom Timeplex" },
898 { 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" },
899 { 0x47, "DCA Remote Lan" },
900 { 0x49, "Serial Data Transport Protocol (PPP-SDTP)" },
901 { 0x4b, "SNA over 802.2" },
903 { 0x4f, "IP6 Header Compression" },
904 { 0x51, "KNX Bridging Data" },
905 { 0x53, "Encryption" },
906 { 0x55, "Individual Link Encryption" },
908 { 0x59, "PPP Muxing" },
909 { 0x5b, "Vendor-Specific Network Protocol" },
910 { 0x61, "RTP IPHC Full Header" },
911 { 0x63, "RTP IPHC Compressed TCP" },
912 { 0x65, "RTP IPHC Compressed non-TCP" },
913 { 0x67, "RTP IPHC Compressed UDP 8" },
914 { 0x69, "RTP IPHC Compressed RTP 8" },
915 { 0x6f, "Stampede Bridging" },
917 { 0xc1, "NTCITS IPI" },
918 { 0xfb, "single-link compression" },
919 { 0xfd, "Compressed Datagram" },
920 { 0x0201, "802.1d Hello Packets" },
921 { 0x0203, "IBM Source Routing BPDU" },
922 { 0x0205, "DEC LANBridge100 Spanning Tree" },
923 { 0x0207, "Cisco Discovery Protocol" },
924 { 0x0209, "Netcs Twin Routing" },
925 { 0x020b, "STP - Scheduled Transfer Protocol" },
926 { 0x020d, "EDP - Extreme Discovery Protocol" },
927 { 0x0211, "Optical Supervisory Channel Protocol" },
928 { 0x0213, "Optical Supervisory Channel Protocol" },
929 { 0x0231, "Luxcom" },
930 { 0x0233, "Sigma Network Systems" },
931 { 0x0235, "Apple Client Server Protocol" },
932 { 0x0281, "MPLS Unicast" },
933 { 0x0283, "MPLS Multicast" },
934 { 0x0285, "IEEE p1284.4 standard - data packets" },
935 { 0x0287, "ETSI TETRA Network Protocol Type 1" },
936 { 0x0289, "Multichannel Flow Treatment Protocol" },
937 { 0x2063, "RTP IPHC Compressed TCP No Delta" },
938 { 0x2065, "RTP IPHC Context State" },
939 { 0x2067, "RTP IPHC Compressed UDP 16" },
940 { 0x2069, "RTP IPHC Compressed RTP 16" },
941 { 0x4001, "Cray Communications Control Protocol" },
942 { 0x4003, "CDPD Mobile Network Registration Protocol" },
943 { 0x4005, "Expand accelerator protocol" },
944 { 0x4007, "ODSICP NCP" },
945 { 0x4009, "DOCSIS DLL" },
946 { 0x400B, "Cetacean Network Detection Protocol" },
947 { 0x4021, "Stacker LZS" },
948 { 0x4023, "RefTek Protocol" },
949 { 0x4025, "Fibre Channel" },
950 { 0x4027, "EMIT Protocols" },
951 { 0x405b, "Vendor-Specific Protocol (VSP)" },
952 { 0x8021, "Internet Protocol Control Protocol" },
953 { 0x8023, "OSI Network Layer Control Protocol" },
954 { 0x8025, "Xerox NS IDP Control Protocol" },
955 { 0x8027, "DECnet Phase IV Control Protocol" },
956 { 0x8029, "Appletalk Control Protocol" },
957 { 0x802b, "Novell IPX Control Protocol" },
958 { 0x8031, "Bridging NCP" },
959 { 0x8033, "Stream Protocol Control Protocol" },
960 { 0x8035, "Banyan Vines Control Protocol" },
961 { 0x803d, "Multi-Link Control Protocol" },
962 { 0x803f, "NETBIOS Framing Control Protocol" },
963 { 0x8041, "Cisco Systems Control Protocol" },
964 { 0x8043, "Ascom Timeplex" },
965 { 0x8045, "Fujitsu LBLB Control Protocol" },
966 { 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" },
967 { 0x8049, "Serial Data Control Protocol (PPP-SDCP)" },
968 { 0x804b, "SNA over 802.2 Control Protocol" },
969 { 0x804d, "SNA Control Protocol" },
970 { 0x804f, "IP6 Header Compression Control Protocol" },
971 { 0x8051, "KNX Bridging Control Protocol" },
972 { 0x8053, "Encryption Control Protocol" },
973 { 0x8055, "Individual Link Encryption Control Protocol" },
974 { 0x8057, "IPv6 Control Protocol" },
975 { 0x8059, "PPP Muxing Control Protocol" },
976 { 0x805b, "Vendor-Specific Network Control Protocol (VSNCP)" },
977 { 0x806f, "Stampede Bridging Control Protocol" },
978 { 0x8073, "MP+ Control Protocol" },
979 { 0x80c1, "NTCITS IPI Control Protocol" },
980 { 0x80fb, "Single Link Compression Control Protocol" },
981 { 0x80fd, "Compression Control Protocol" },
982 { 0x8207, "Cisco Discovery Protocol Control" },
983 { 0x8209, "Netcs Twin Routing" },
984 { 0x820b, "STP - Control Protocol" },
985 { 0x820d, "EDPCP - Extreme Discovery Protocol Ctrl Prtcl" },
986 { 0x8235, "Apple Client Server Protocol Control" },
987 { 0x8281, "MPLSCP" },
988 { 0x8285, "IEEE p1284.4 standard - Protocol Control" },
989 { 0x8287, "ETSI TETRA TNP1 Control Protocol" },
990 { 0x8289, "Multichannel Flow Treatment Protocol" },
991 { 0xc021, "Link Control Protocol" },
992 { 0xc023, "Password Authentication Protocol" },
993 { 0xc025, "Link Quality Report" },
994 { 0xc027, "Shiva Password Authentication Protocol" },
995 { 0xc029, "CallBack Control Protocol (CBCP)" },
996 { 0xc02b, "BACP Bandwidth Allocation Control Protocol" },
998 { 0xc05b, "Vendor-Specific Authentication Protocol (VSAP)" },
999 { 0xc081, "Container Control Protocol" },
1000 { 0xc223, "Challenge Handshake Authentication Protocol" },
1001 { 0xc225, "RSA Authentication Protocol" },
1002 { 0xc227, "Extensible Authentication Protocol" },
1003 { 0xc229, "Mitsubishi Security Info Exch Ptcl (SIEP)" },
1004 { 0xc26f, "Stampede Bridging Authorization Protocol" },
1005 { 0xc281, "Proprietary Authentication Protocol" },
1006 { 0xc283, "Proprietary Authentication Protocol" },
1007 { 0xc481, "Proprietary Node ID Authentication Protocol" },
1012 * protocol_name - find a name for a PPP protocol.
1015 protocol_name(proto)
1018 struct protocol_list *lp;
1020 for (lp = protocol_list; lp->proto != 0; ++lp)
1021 if (proto == lp->proto)
1027 * get_input - called when incoming data is available.
1035 struct protent *protp;
1037 p = inpacket_buf; /* point to beginning of packet buffer */
1039 len = read_packet(inpacket_buf);
1044 if (bundle_eof && multilink_master) {
1045 notice("Last channel has disconnected");
1046 mp_bundle_terminated();
1049 notice("Modem hangup");
1051 status = EXIT_HANGUP;
1052 lcp_lowerdown(0); /* serial link is no longer available */
1057 if (len < PPP_HDRLEN) {
1058 dbglog("received short packet:%.*B", len, p);
1062 dump_packet("rcvd", p, len);
1063 if (snoop_recv_hook) snoop_recv_hook(p, len);
1065 p += 2; /* Skip address and control */
1066 GETSHORT(protocol, p);
1070 * Toss all non-LCP packets unless LCP is OPEN.
1072 if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) {
1073 dbglog("Discarded non-LCP packet when LCP not open");
1078 * Until we get past the authentication phase, toss all packets
1079 * except LCP, LQR and authentication packets.
1081 if (phase <= PHASE_AUTHENTICATE
1082 && !(protocol == PPP_LCP || protocol == PPP_LQR
1083 || protocol == PPP_PAP || protocol == PPP_CHAP ||
1084 protocol == PPP_EAP)) {
1085 dbglog("discarding proto 0x%x in phase %d",
1091 * Upcall the proper protocol input routine.
1093 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
1094 if (protp->protocol == protocol && protp->enabled_flag) {
1095 (*protp->input)(0, p, len);
1098 if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
1099 && protp->datainput != NULL) {
1100 (*protp->datainput)(0, p, len);
1106 const char *pname = protocol_name(protocol);
1108 warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
1110 warn("Unsupported protocol 0x%x received", protocol);
1112 lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
1116 * ppp_send_config - configure the transmit-side characteristics of
1117 * the ppp interface. Returns -1, indicating an error, if the channel
1118 * send_config procedure called error() (or incremented error_count
1119 * itself), otherwise 0.
1122 ppp_send_config(unit, mtu, accm, pcomp, accomp)
1129 if (the_channel->send_config == NULL)
1132 (*the_channel->send_config)(mtu, accm, pcomp, accomp);
1133 return (error_count != errs)? -1: 0;
1137 * ppp_recv_config - configure the receive-side characteristics of
1138 * the ppp interface. Returns -1, indicating an error, if the channel
1139 * recv_config procedure called error() (or incremented error_count
1140 * itself), otherwise 0.
1143 ppp_recv_config(unit, mru, accm, pcomp, accomp)
1150 if (the_channel->recv_config == NULL)
1153 (*the_channel->recv_config)(mru, accm, pcomp, accomp);
1154 return (error_count != errs)? -1: 0;
1158 * new_phase - signal the start of a new phase of pppd's operation.
1166 (*new_phase_hook)(p);
1167 notify(phasechange, p);
1171 * die - clean up state and exit with the specified status.
1177 if (!doing_multilink || multilink_master)
1180 notify(exitnotify, status);
1181 syslog(LOG_INFO, "Exit.");
1186 * cleanup - restore anything which needs to be restored before we exit
1195 the_channel->disestablish_ppp(devfd);
1196 if (the_channel->cleanup)
1197 (*the_channel->cleanup)();
1211 * Print connect time and statistics.
1213 if (link_stats_valid) {
1214 int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */
1215 info("Connect time %d.%d minutes.", t/10, t%10);
1216 info("Sent %u bytes, received %u bytes.",
1217 link_stats.bytes_out, link_stats.bytes_in);
1218 link_stats_valid = 0;
1223 * reset_link_stats - "reset" stats when link goes up.
1229 if (!get_ppp_stats(u, &old_link_stats))
1231 get_time(&start_time);
1235 * update_link_stats - get stats at link termination.
1238 update_link_stats(u)
1244 if (!get_ppp_stats(u, &link_stats)
1245 || get_time(&now) < 0)
1247 link_connect_time = now.tv_sec - start_time.tv_sec;
1248 link_stats_valid = 1;
1250 link_stats.bytes_in -= old_link_stats.bytes_in;
1251 link_stats.bytes_out -= old_link_stats.bytes_out;
1252 link_stats.pkts_in -= old_link_stats.pkts_in;
1253 link_stats.pkts_out -= old_link_stats.pkts_out;
1255 slprintf(numbuf, sizeof(numbuf), "%u", link_connect_time);
1256 script_setenv("CONNECT_TIME", numbuf, 0);
1257 slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_out);
1258 script_setenv("BYTES_SENT", numbuf, 0);
1259 slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_in);
1260 script_setenv("BYTES_RCVD", numbuf, 0);
1265 struct timeval c_time; /* time at which to call routine */
1266 void *c_arg; /* argument to routine */
1267 void (*c_func) __P((void *)); /* routine */
1268 struct callout *c_next;
1271 static struct callout *callout = NULL; /* Callout list */
1272 static struct timeval timenow; /* Current time */
1275 * timeout - Schedule a timeout.
1278 timeout(func, arg, secs, usecs)
1279 void (*func) __P((void *));
1283 struct callout *newp, *p, **pp;
1288 if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL)
1289 fatal("Out of memory in timeout()!");
1291 newp->c_func = func;
1293 newp->c_time.tv_sec = timenow.tv_sec + secs;
1294 newp->c_time.tv_usec = timenow.tv_usec + usecs;
1295 if (newp->c_time.tv_usec >= 1000000) {
1296 newp->c_time.tv_sec += newp->c_time.tv_usec / 1000000;
1297 newp->c_time.tv_usec %= 1000000;
1301 * Find correct place and link it in.
1303 for (pp = &callout; (p = *pp); pp = &p->c_next)
1304 if (newp->c_time.tv_sec < p->c_time.tv_sec
1305 || (newp->c_time.tv_sec == p->c_time.tv_sec
1306 && newp->c_time.tv_usec < p->c_time.tv_usec))
1314 * untimeout - Unschedule a timeout.
1317 untimeout(func, arg)
1318 void (*func) __P((void *));
1321 struct callout **copp, *freep;
1324 * Find first matching timeout and remove it from the list.
1326 for (copp = &callout; (freep = *copp); copp = &freep->c_next)
1327 if (freep->c_func == func && freep->c_arg == arg) {
1328 *copp = freep->c_next;
1329 free((char *) freep);
1336 * calltimeout - Call any timeout routines which are now due.
1343 while (callout != NULL) {
1346 if (get_time(&timenow) < 0)
1347 fatal("Failed to get time of day: %m");
1348 if (!(p->c_time.tv_sec < timenow.tv_sec
1349 || (p->c_time.tv_sec == timenow.tv_sec
1350 && p->c_time.tv_usec <= timenow.tv_usec)))
1351 break; /* no, it's not time yet */
1353 callout = p->c_next;
1354 (*p->c_func)(p->c_arg);
1362 * timeleft - return the length of time until the next timeout is due.
1364 static struct timeval *
1366 struct timeval *tvp;
1368 if (callout == NULL)
1372 tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec;
1373 tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec;
1374 if (tvp->tv_usec < 0) {
1375 tvp->tv_usec += 1000000;
1378 if (tvp->tv_sec < 0)
1379 tvp->tv_sec = tvp->tv_usec = 0;
1386 * kill_my_pg - send a signal to our process group, and ignore it ourselves.
1387 * We assume that sig is currently blocked.
1393 struct sigaction act, oldact;
1394 struct subprocess *chp;
1398 * There might be other things in our process group that we
1399 * didn't start that would get hit if we did a kill(0), so
1400 * just send the signal individually to our children.
1402 for (chp = children; chp != NULL; chp = chp->next)
1404 kill(chp->pid, sig);
1408 /* We've done a setsid(), so we can just use a kill(0) */
1409 sigemptyset(&act.sa_mask); /* unnecessary in fact */
1410 act.sa_handler = SIG_IGN;
1414 * The kill() above made the signal pending for us, as well as
1415 * the rest of our process group, but we don't want it delivered
1416 * to us. It is blocked at the moment. Setting it to be ignored
1417 * will cause the pending signal to be discarded. If we did the
1418 * kill() after setting the signal to be ignored, it is unspecified
1419 * (by POSIX) whether the signal is immediately discarded or left
1420 * pending, and in fact Linux would leave it pending, and so it
1421 * would be delivered after the current signal handler exits,
1422 * leading to an infinite loop.
1424 sigaction(sig, &act, &oldact);
1425 sigaction(sig, &oldact, NULL);
1430 * hup - Catch SIGHUP signal.
1432 * Indicates that the physical layer has been disconnected.
1433 * We don't rely on this indication; if the user has sent this
1434 * signal, we just take the link down.
1440 /* can't log a message here, it can deadlock */
1443 /* Send the signal to the [dis]connector process(es) also */
1445 notify(sigreceived, sig);
1447 write(sigpipe[1], &sig, sizeof(sig));
1452 * term - Catch SIGTERM signal and SIGINT signal (^C/del).
1454 * Indicates that we should initiate a graceful disconnect and exit.
1461 /* can't log a message here, it can deadlock */
1464 /* Send the signal to the [dis]connector process(es) also */
1466 notify(sigreceived, sig);
1468 write(sigpipe[1], &sig, sizeof(sig));
1473 * chld - Catch SIGCHLD signal.
1474 * Sets a flag so we will call reap_kids in the mainline.
1482 write(sigpipe[1], &sig, sizeof(sig));
1487 * toggle_debug - Catch SIGUSR1 signal.
1489 * Toggle debug flag.
1498 setlogmask(LOG_UPTO(LOG_DEBUG));
1500 setlogmask(LOG_UPTO(LOG_WARNING));
1506 * open_ccp - Catch SIGUSR2 signal.
1508 * Try to (re)negotiate compression.
1517 write(sigpipe[1], &sig, sizeof(sig));
1522 * bad_signal - We've caught a fatal signal. Clean up state and exit.
1528 static int crashed = 0;
1533 error("Fatal signal %d", sig);
1535 kill_my_pg(SIGTERM);
1536 notify(sigreceived, sig);
1541 * safe_fork - Create a child process. The child closes all the
1542 * file descriptors that we don't want to leak to a script.
1543 * The parent waits for the child to do this before returning.
1544 * This also arranges for the specified fds to be dup'd to
1545 * fds 0, 1, 2 in the child.
1548 safe_fork(int infd, int outfd, int errfd)
1554 /* make sure fds 0, 1, 2 are occupied (probably not necessary) */
1555 while ((fd = dup(fd_devnull)) >= 0) {
1562 if (pipe(pipefd) == -1)
1563 pipefd[0] = pipefd[1] = -1;
1566 error("fork failed: %m");
1572 /* this read() blocks until the close(pipefd[1]) below */
1573 complete_read(pipefd[0], buf, 1);
1578 /* Executing in the child */
1585 /* make sure infd, outfd and errfd won't get tromped on below */
1586 if (infd == 1 || infd == 2)
1588 if (outfd == 0 || outfd == 2)
1590 if (errfd == 0 || errfd == 1)
1595 /* dup the in, out, err fds to 0, 1, 2 */
1605 if (the_channel->close)
1606 (*the_channel->close)();
1608 close(devfd); /* some plugins don't have a close function */
1618 notify(fork_notifier, 0);
1620 /* this close unblocks the read() call above in the parent */
1627 add_script_env(pos, newstring)
1631 if (pos + 1 >= s_env_nalloc) {
1632 int new_n = pos + 17;
1633 char **newenv = realloc(script_env, new_n * sizeof(char *));
1634 if (newenv == NULL) {
1635 free(newstring - 1);
1638 script_env = newenv;
1639 s_env_nalloc = new_n;
1641 script_env[pos] = newstring;
1642 script_env[pos + 1] = NULL;
1647 remove_script_env(pos)
1650 free(script_env[pos] - 1);
1651 while ((script_env[pos] = script_env[pos + 1]) != NULL)
1656 * update_system_environment - process the list of set/unset options
1657 * and update the system environment.
1660 update_system_environment()
1662 struct userenv *uep;
1664 for (uep = userenv_list; uep != NULL; uep = uep->ue_next) {
1666 setenv(uep->ue_name, uep->ue_value, 1);
1668 unsetenv(uep->ue_name);
1673 * device_script - run a program to talk to the specified fds
1674 * (e.g. to run the connector or disconnector script).
1675 * stderr gets connected to the log fd or to the _PATH_CONNERRS file.
1678 device_script(program, in, out, dont_wait)
1690 errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0600);
1693 pid = safe_fork(in, out, errfd);
1695 if (pid != 0 && log_to_fd < 0)
1700 error("Failed to create child process: %m");
1705 record_child(pid, program, NULL, NULL, 1);
1708 while (waitpid(pid, &status, 0) < 0) {
1711 fatal("error waiting for (dis)connection process: %m");
1713 forget_child(pid, status);
1716 return (status == 0 ? 0 : -1);
1719 /* here we are executing in the child */
1723 if (getuid() != uid) {
1724 fprintf(stderr, "pppd: setuid failed\n");
1727 update_system_environment();
1728 execl("/bin/sh", "sh", "-c", program, (char *)0);
1729 perror("pppd: could not exec /bin/sh");
1736 * update_script_environment - process the list of set/unset options
1737 * and update the script environment. Note that we intentionally do
1738 * not update the TDB. These changes are layered on top right before
1739 * exec. It is not possible to use script_setenv() or
1740 * script_unsetenv() safely after this routine is run.
1743 update_script_environment()
1745 struct userenv *uep;
1747 for (uep = userenv_list; uep != NULL; uep = uep->ue_next) {
1749 char *p, *newstring;
1750 int nlen = strlen(uep->ue_name);
1752 for (i = 0; (p = script_env[i]) != NULL; i++) {
1753 if (strncmp(p, uep->ue_name, nlen) == 0 && p[nlen] == '=')
1756 if (uep->ue_isset) {
1757 nlen += strlen(uep->ue_value) + 2;
1758 newstring = malloc(nlen + 1);
1759 if (newstring == NULL)
1762 slprintf(newstring, nlen, "%s=%s", uep->ue_name, uep->ue_value);
1764 script_env[i] = newstring;
1766 add_script_env(i, newstring);
1767 } else if (p != NULL) {
1768 remove_script_env(i);
1774 * run_program - execute a program with given arguments,
1775 * but don't wait for it unless wait is non-zero.
1776 * If the program can't be executed, logs an error unless
1777 * must_exist is 0 and the program file doesn't exist.
1778 * Returns -1 if it couldn't fork, 0 if the file doesn't exist
1779 * or isn't an executable plain file, or the process ID of the child.
1780 * If done != NULL, (*done)(arg) will be called later (within
1781 * reap_kids) iff the return value is > 0.
1784 run_program(prog, args, must_exist, done, arg, wait)
1788 void (*done) __P((void *));
1796 * First check if the file exists and is executable.
1797 * We don't use access() because that would use the
1798 * real user-id, which might not be root, and the script
1799 * might be accessible only to root.
1802 if (stat(prog, &sbuf) < 0 || !S_ISREG(sbuf.st_mode)
1803 || (sbuf.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0) {
1804 if (must_exist || errno != ENOENT)
1805 warn("Can't execute %s: %m", prog);
1809 pid = safe_fork(fd_devnull, fd_devnull, fd_devnull);
1811 error("Failed to create child process for %s: %m", prog);
1816 dbglog("Script %s started (pid %d)", prog, pid);
1817 record_child(pid, prog, done, arg, 0);
1819 while (waitpid(pid, &status, 0) < 0) {
1822 fatal("error waiting for script %s: %m", prog);
1824 forget_child(pid, status);
1829 /* Leave the current location */
1830 (void) setsid(); /* No controlling tty. */
1831 (void) umask (S_IRWXG|S_IRWXO);
1832 (void) chdir ("/"); /* no current directory. */
1833 setuid(0); /* set real UID = root */
1837 /* Force the priority back to zero if pppd is running higher. */
1838 if (setpriority (PRIO_PROCESS, 0, 0) < 0)
1839 warn("can't reset priority to 0: %m");
1842 /* run the program */
1843 update_script_environment();
1844 execve(prog, args, script_env);
1845 if (must_exist || errno != ENOENT) {
1846 /* have to reopen the log, there's nowhere else
1847 for the message to go. */
1849 syslog(LOG_ERR, "Can't execute %s: %m", prog);
1857 * record_child - add a child process to the list for reap_kids
1861 record_child(pid, prog, done, arg, killable)
1864 void (*done) __P((void *));
1868 struct subprocess *chp;
1872 chp = (struct subprocess *) malloc(sizeof(struct subprocess));
1874 warn("losing track of %s process", prog);
1880 chp->next = children;
1881 chp->killable = killable;
1887 * childwait_end - we got fed up waiting for the child processes to
1888 * exit, send them all a SIGTERM.
1894 struct subprocess *chp;
1896 for (chp = children; chp != NULL; chp = chp->next) {
1898 dbglog("sending SIGTERM to process %d", chp->pid);
1899 kill(chp->pid, SIGTERM);
1905 * forget_child - clean up after a dead child
1908 forget_child(pid, status)
1911 struct subprocess *chp, **prevp;
1913 for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next) {
1914 if (chp->pid == pid) {
1920 if (WIFSIGNALED(status)) {
1921 warn("Child process %s (pid %d) terminated with signal %d",
1922 (chp? chp->prog: "??"), pid, WTERMSIG(status));
1924 dbglog("Script %s finished (pid %d), status = 0x%x",
1925 (chp? chp->prog: "??"), pid,
1926 WIFEXITED(status) ? WEXITSTATUS(status) : status);
1927 if (chp && chp->done)
1928 (*chp->done)(chp->arg);
1934 * reap_kids - get status from any dead child processes,
1935 * and log a message for abnormal terminations.
1942 if (n_children == 0)
1944 while ((pid = waitpid(-1, &status, WNOHANG)) != -1 && pid != 0) {
1945 forget_child(pid, status);
1948 if (errno == ECHILD)
1951 error("Error waiting for child process: %m");
1957 * add_notifier - add a new function to be called when something happens.
1960 add_notifier(notif, func, arg)
1961 struct notifier **notif;
1965 struct notifier *np;
1967 np = malloc(sizeof(struct notifier));
1969 novm("notifier struct");
1977 * remove_notifier - remove a function from the list of things to
1978 * be called when something happens.
1981 remove_notifier(notif, func, arg)
1982 struct notifier **notif;
1986 struct notifier *np;
1988 for (; (np = *notif) != 0; notif = &np->next) {
1989 if (np->func == func && np->arg == arg) {
1998 * notify - call a set of functions registered with add_notifier.
2002 struct notifier *notif;
2005 struct notifier *np;
2007 while ((np = notif) != 0) {
2009 (*np->func)(np->arg, val);
2014 * novm - log an error message saying we ran out of memory, and die.
2020 fatal("Virtual memory exhausted allocating %s\n", msg);
2024 * script_setenv - set an environment variable value to be used
2025 * for scripts that we run (e.g. ip-up, auth-up, etc.)
2028 script_setenv(var, value, iskey)
2032 size_t varl = strlen(var);
2033 size_t vl = varl + strlen(value) + 2;
2035 char *p, *newstring;
2037 newstring = (char *) malloc(vl+1);
2040 *newstring++ = iskey;
2041 slprintf(newstring, vl, "%s=%s", var, value);
2043 /* check if this variable is already set */
2044 if (script_env != 0) {
2045 for (i = 0; (p = script_env[i]) != 0; ++i) {
2046 if (strncmp(p, var, varl) == 0 && p[varl] == '=') {
2048 if (p[-1] && pppdb != NULL)
2052 script_env[i] = newstring;
2054 if (pppdb != NULL) {
2056 add_db_key(newstring);
2064 /* no space allocated for script env. ptrs. yet */
2066 script_env = malloc(16 * sizeof(char *));
2067 if (script_env == 0) {
2068 free(newstring - 1);
2074 if (!add_script_env(i, newstring))
2078 if (pppdb != NULL) {
2080 add_db_key(newstring);
2087 * script_unsetenv - remove a variable from the environment
2091 script_unsetenv(var)
2094 int vl = strlen(var);
2098 if (script_env == 0)
2100 for (i = 0; (p = script_env[i]) != 0; ++i) {
2101 if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
2103 if (p[-1] && pppdb != NULL)
2106 remove_script_env(i);
2117 * Any arbitrary string used as a key for locking the database.
2118 * It doesn't matter what it is as long as all pppds use the same string.
2120 #define PPPD_LOCK_KEY "pppd lock"
2123 * lock_db - get an exclusive lock on the TDB database.
2124 * Used to ensure atomicity of various lookup/modify operations.
2131 key.dptr = PPPD_LOCK_KEY;
2132 key.dsize = strlen(key.dptr);
2133 tdb_chainlock(pppdb, key);
2138 * unlock_db - remove the exclusive lock obtained by lock_db.
2145 key.dptr = PPPD_LOCK_KEY;
2146 key.dsize = strlen(key.dptr);
2147 tdb_chainunlock(pppdb, key);
2153 * update_db_entry - update our entry in the database.
2162 if (script_env == NULL)
2165 for (i = 0; (p = script_env[i]) != 0; ++i)
2166 vlen += strlen(p) + 1;
2167 vbuf = malloc(vlen + 1);
2169 novm("database entry");
2171 for (i = 0; (p = script_env[i]) != 0; ++i)
2172 q += slprintf(q, vbuf + vlen - q, "%s;", p);
2175 key.dsize = strlen(db_key);
2178 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE))
2179 error("tdb_store failed: %s", tdb_errorstr(pppdb));
2187 * add_db_key - add a key that we can use to look up our database entry.
2195 key.dptr = (char *) str;
2196 key.dsize = strlen(str);
2198 dbuf.dsize = strlen(db_key);
2199 if (tdb_store(pppdb, key, dbuf, TDB_REPLACE))
2200 error("tdb_store key failed: %s", tdb_errorstr(pppdb));
2204 * delete_db_key - delete a key for looking up our database entry.
2212 key.dptr = (char *) str;
2213 key.dsize = strlen(str);
2214 tdb_delete(pppdb, key);
2218 * cleanup_db - delete all the entries we put in the database.
2228 key.dsize = strlen(db_key);
2229 tdb_delete(pppdb, key);
2230 for (i = 0; (p = script_env[i]) != 0; ++i)
2234 #endif /* USE_TDB */