2265 lines
54 KiB
C
Executable File
2265 lines
54 KiB
C
Executable File
/*
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* main.c - Point-to-Point Protocol main module
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*
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* Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The name "Carnegie Mellon University" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For permission or any legal
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* details, please contact
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* Office of Technology Transfer
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* Carnegie Mellon University
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* 5000 Forbes Avenue
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* Pittsburgh, PA 15213-3890
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* (412) 268-4387, fax: (412) 268-7395
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* tech-transfer@andrew.cmu.edu
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*
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* 4. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by Computing Services
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* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
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*
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* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
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* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Copyright (c) 1999-2004 Paul Mackerras. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. The name(s) of the authors of this software must not be used to
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* endorse or promote products derived from this software without
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* prior written permission.
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*
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* 3. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by Paul Mackerras
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* <paulus@samba.org>".
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*
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* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#define RCSID "$Id: //BBN_Linux/Branch/Branch_for_Rel_TP_ASEAN_20161216/tclinux_phoenix/apps/public/ppp-2.4.5/pppd/main.c#1 $"
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <syslog.h>
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#include <netdb.h>
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#include <utmp.h>
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#include <pwd.h>
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#include <setjmp.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "pppd.h"
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#include "magic.h"
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#include "fsm.h"
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#include "lcp.h"
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#include "ipcp.h"
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#ifdef INET6
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#include "ipv6cp.h"
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#endif
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#include "upap.h"
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#include "chap-new.h"
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#include "eap.h"
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#include "ccp.h"
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#include "ecp.h"
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#include "pathnames.h"
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#ifdef USE_TDB
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#include "tdb.h"
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#endif
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#ifdef CBCP_SUPPORT
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#include "cbcp.h"
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#endif
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#ifdef IPX_CHANGE
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#include "ipxcp.h"
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#endif /* IPX_CHANGE */
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#ifdef AT_CHANGE
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#include "atcp.h"
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#endif
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#ifdef TCSUPPORT_FON_V2_MODEL_D_OTE
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#include "pidfile.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#endif
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static const char rcsid[] = RCSID;
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/* interface vars */
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char ifname[32]; /* Interface name */
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int ifunit; /* Interface unit number */
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struct channel *the_channel;
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char *progname; /* Name of this program */
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char hostname[MAXNAMELEN]; /* Our hostname */
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static char pidfilename[MAXPATHLEN]; /* name of pid file */
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static char linkpidfile[MAXPATHLEN]; /* name of linkname pid file */
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char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */
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uid_t uid; /* Our real user-id */
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struct notifier *pidchange = NULL;
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struct notifier *phasechange = NULL;
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struct notifier *exitnotify = NULL;
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struct notifier *sigreceived = NULL;
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struct notifier *fork_notifier = NULL;
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int hungup; /* terminal has been hung up */
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int privileged; /* we're running as real uid root */
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int need_holdoff; /* need holdoff period before restarting */
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int detached; /* have detached from terminal */
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volatile int status; /* exit status for pppd */
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int unsuccess; /* # unsuccessful connection attempts */
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int do_callback; /* != 0 if we should do callback next */
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int doing_callback; /* != 0 if we are doing callback */
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int ppp_session_number; /* Session number, for channels with such a
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concept (eg PPPoE) */
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int childwait_done; /* have timed out waiting for children */
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#ifdef USE_TDB
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TDB_CONTEXT *pppdb; /* database for storing status etc. */
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#endif
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char db_key[32];
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int (*holdoff_hook) __P((void)) = NULL;
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int (*new_phase_hook) __P((int)) = NULL;
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void (*snoop_recv_hook) __P((unsigned char *p, int len)) = NULL;
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void (*snoop_send_hook) __P((unsigned char *p, int len)) = NULL;
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static int conn_running; /* we have a [dis]connector running */
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static int fd_loop; /* fd for getting demand-dial packets */
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int fd_devnull; /* fd for /dev/null */
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int devfd = -1; /* fd of underlying device */
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int fd_ppp = -1; /* fd for talking PPP */
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int phase; /* where the link is at */
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int kill_link;
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int asked_to_quit;
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int open_ccp_flag;
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int listen_time;
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int got_sigusr2;
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int got_sigterm;
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int got_sighup;
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static sigset_t signals_handled;
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static int waiting;
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static sigjmp_buf sigjmp;
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char **script_env; /* Env. variable values for scripts */
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int s_env_nalloc; /* # words avail at script_env */
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u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */
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u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */
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static int n_children; /* # child processes still running */
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static int got_sigchld; /* set if we have received a SIGCHLD */
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int privopen; /* don't lock, open device as root */
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char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n";
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GIDSET_TYPE groups[NGROUPS_MAX];/* groups the user is in */
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int ngroups; /* How many groups valid in groups */
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static struct timeval start_time; /* Time when link was started. */
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static struct pppd_stats old_link_stats;
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struct pppd_stats link_stats;
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unsigned link_connect_time;
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int link_stats_valid;
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int error_count;
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bool bundle_eof;
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bool bundle_terminating;
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/*
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* We maintain a list of child process pids and
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* functions to call when they exit.
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*/
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struct subprocess {
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pid_t pid;
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char *prog;
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void (*done) __P((void *));
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void *arg;
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int killable;
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struct subprocess *next;
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};
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static struct subprocess *children;
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/* Prototypes for procedures local to this file. */
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static void setup_signals __P((void));
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static void create_pidfile __P((int pid));
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static void create_linkpidfile __P((int pid));
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static void cleanup __P((void));
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static void get_input __P((void));
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static void calltimeout __P((void));
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static struct timeval *timeleft __P((struct timeval *));
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static void kill_my_pg __P((int));
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static void hup __P((int));
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static void term __P((int));
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static void chld __P((int));
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static void toggle_debug __P((int));
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static void open_ccp __P((int));
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static void bad_signal __P((int));
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static void holdoff_end __P((void *));
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static void forget_child __P((int pid, int status));
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static int reap_kids __P((void));
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static void childwait_end __P((void *));
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#ifdef USE_TDB
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static void update_db_entry __P((void));
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static void add_db_key __P((const char *));
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static void delete_db_key __P((const char *));
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static void cleanup_db __P((void));
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#endif
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static void handle_events __P((void));
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void print_link_stats __P((void));
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extern char *ttyname __P((int));
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extern char *getlogin __P((void));
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int main __P((int, char *[]));
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#ifdef ultrix
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#undef O_NONBLOCK
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#define O_NONBLOCK O_NDELAY
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#endif
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#ifdef ULTRIX
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#define setlogmask(x)
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#endif
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/*
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* PPP Data Link Layer "protocol" table.
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* One entry per supported protocol.
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* The last entry must be NULL.
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*/
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struct protent *protocols[] = {
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&lcp_protent,
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&pap_protent,
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&chap_protent,
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#ifdef CBCP_SUPPORT
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&cbcp_protent,
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#endif
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&ipcp_protent,
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#ifdef INET6
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&ipv6cp_protent,
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#endif
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&ccp_protent,
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&ecp_protent,
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#ifdef IPX_CHANGE
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&ipxcp_protent,
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#endif
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#ifdef AT_CHANGE
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&atcp_protent,
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#endif
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&eap_protent,
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NULL
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};
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/*
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* If PPP_DRV_NAME is not defined, use the default "ppp" as the device name.
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*/
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#if !defined(PPP_DRV_NAME)
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#define PPP_DRV_NAME "ppp"
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#endif /* !defined(PPP_DRV_NAME) */
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#ifdef TCSUPPORT_FON_V2_MODEL_D_OTE
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int isFonPVC = 0;
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int isFonIface(int iface){
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char FonPvcs[32];
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char tmp[10];
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memset(FonPvcs, 0, sizeof(FonPvcs));
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tcapi_get("FonNet_Entry", "fon_pvcs", FonPvcs);
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memset(tmp, 0, sizeof(tmp));
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sprintf(tmp, "%d", iface);
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if(strstr(FonPvcs, tmp) != NULL)
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return 1;
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else
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return 0;
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}
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void log_pid(int ifnum)
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{
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int pid_fd;
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char pidFile[32];
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sprintf(pidFile, "/var/run/ppp%d.pid", ifnum);
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/* do some other misc startup stuff while we are here to save bytes */
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pid_fd = pidfile_acquire(pidFile);
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pidfile_write_release(pid_fd);
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return;
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}
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#endif
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int i, t;
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char *p;
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struct passwd *pw;
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struct protent *protp;
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char numbuf[16];
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FILE *fp; /* record ppp link start time.shnwind 2008.4.17*/
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char t_tmp[32];
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//Added by tzzhang, 20110609
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#if defined(TC_SUPPORT_3G)
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#endif
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link_stats_valid = 0;
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new_phase(PHASE_INITIALIZE);
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/* Ron */
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unlink("/tmp/ppp.fail");
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unlink("/tmp/lcp");
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script_env = NULL;
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/* Initialize syslog facilities */
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reopen_log();
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if (gethostname(hostname, MAXNAMELEN) < 0 ) {
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option_error("Couldn't get hostname: %m");
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exit(1);
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}
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hostname[MAXNAMELEN-1] = 0;
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/* make sure we don't create world or group writable files. */
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umask(umask(0777) | 022);
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uid = getuid();
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privileged = uid == 0;
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slprintf(numbuf, sizeof(numbuf), "%d", uid);
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script_setenv("ORIG_UID", numbuf, 0);
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ngroups = getgroups(NGROUPS_MAX, groups);
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/*
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* Initialize magic number generator now so that protocols may
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* use magic numbers in initialization.
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*/
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magic_init();
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/*
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* Initialize each protocol.
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*/
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for (i = 0; (protp = protocols[i]) != NULL; ++i)
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(*protp->init)(0);
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/*
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* Initialize the default channel.
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*/
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tty_init();
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progname = *argv;
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/*
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* Parse, in order, the system options file, the user's options file,
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* and the command line arguments.
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*/
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if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1)
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|| !options_from_user()
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|| !parse_args(argc-1, argv+1))
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exit(EXIT_OPTION_ERROR);
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devnam_fixed = 1; /* can no longer change device name */
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/*
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* Work out the device name, if it hasn't already been specified,
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* and parse the tty's options file.
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*/
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if (the_channel->process_extra_options)
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(*the_channel->process_extra_options)();
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if (debug)
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setlogmask(LOG_UPTO(LOG_DEBUG));
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/*
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* Check that we are running as root.
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*/
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if (geteuid() != 0) {
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option_error("must be root to run %s, since it is not setuid-root",
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argv[0]);
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exit(EXIT_NOT_ROOT);
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}
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if (!ppp_available()) {
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option_error("%s", no_ppp_msg);
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exit(EXIT_NO_KERNEL_SUPPORT);
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}
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/*
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* Check that the options given are valid and consistent.
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*/
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check_options();
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if (!sys_check_options())
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exit(EXIT_OPTION_ERROR);
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auth_check_options();
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#ifdef HAVE_MULTILINK
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mp_check_options();
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#endif
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for (i = 0; (protp = protocols[i]) != NULL; ++i)
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if (protp->check_options != NULL)
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(*protp->check_options)();
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if (the_channel->check_options)
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(*the_channel->check_options)();
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if (dump_options || dryrun) {
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init_pr_log(NULL, LOG_INFO);
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print_options(pr_log, NULL);
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end_pr_log();
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}
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if (dryrun)
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die(0);
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/* Make sure fds 0, 1, 2 are open to somewhere. */
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fd_devnull = open(_PATH_DEVNULL, O_RDWR);
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if (fd_devnull < 0)
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fatal("Couldn't open %s: %m", _PATH_DEVNULL);
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while (fd_devnull <= 2) {
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i = dup(fd_devnull);
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if (i < 0)
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fatal("Critical shortage of file descriptors: dup failed: %m");
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fd_devnull = i;
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}
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|
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/*
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* Initialize system-dependent stuff.
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*/
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sys_init();
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#ifdef USE_TDB
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pppdb = tdb_open(_PATH_PPPDB, 0, 0, O_RDWR|O_CREAT, 0644);
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if (pppdb != NULL) {
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slprintf(db_key, sizeof(db_key), "pppd%d", getpid());
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update_db_entry();
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} else {
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warn("Warning: couldn't open ppp database %s", _PATH_PPPDB);
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if (multilink) {
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warn("Warning: disabling multilink");
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multilink = 0;
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}
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}
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#endif
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|
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/*
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* Detach ourselves from the terminal, if required,
|
|
* and identify who is running us.
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*/
|
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if (!nodetach && !updetach)
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detach();
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p = getlogin();
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if (p == NULL) {
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pw = getpwuid(uid);
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if (pw != NULL && pw->pw_name != NULL)
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p = pw->pw_name;
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else
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p = "(unknown)";
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}
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syslog(LOG_NOTICE, "pppd %s started by %s, uid %d", VERSION, p, uid);
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script_setenv("PPPLOGNAME", p, 0);
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if (devnam[0])
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script_setenv("DEVICE", devnam, 1);
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slprintf(numbuf, sizeof(numbuf), "%d", getpid());
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script_setenv("PPPD_PID", numbuf, 1);
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|
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setup_signals();
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|
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create_linkpidfile(getpid());
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|
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waiting = 0;
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/*
|
|
* If we're doing dial-on-demand, set up the interface now.
|
|
*/
|
|
if (demand) {
|
|
/*
|
|
* Open the loopback channel and set it up to be the ppp interface.
|
|
*/
|
|
fd_loop = open_ppp_loopback();
|
|
set_ifunit(1);
|
|
/*
|
|
* Configure the interface and mark it up, etc.
|
|
*/
|
|
demand_conf();
|
|
}
|
|
|
|
do_callback = 0;
|
|
//Added by tzzhang, 20110609
|
|
|
|
#ifdef TCSUPPORT_FON_V2_MODEL_D_OTE
|
|
if(isFonPVC = isFonIface(req_unit)){
|
|
log_pid(req_unit);
|
|
}
|
|
#endif
|
|
|
|
for (;;) {
|
|
|
|
bundle_eof = 0;
|
|
bundle_terminating = 0;
|
|
listen_time = 0;
|
|
need_holdoff = 1;
|
|
devfd = -1;
|
|
status = EXIT_OK;
|
|
++unsuccess;
|
|
doing_callback = do_callback;
|
|
do_callback = 0;
|
|
|
|
if (demand && !doing_callback) {
|
|
/*
|
|
* Don't do anything until we see some activity.
|
|
*/
|
|
new_phase(PHASE_DORMANT);
|
|
demand_unblock();
|
|
add_fd(fd_loop);
|
|
for (;;) {
|
|
handle_events();
|
|
if (asked_to_quit)
|
|
break;
|
|
if (get_loop_output())
|
|
break;
|
|
}
|
|
remove_fd(fd_loop);
|
|
if (asked_to_quit)
|
|
break;
|
|
|
|
/*
|
|
* Now we want to bring up the link.
|
|
*/
|
|
demand_block();
|
|
info("Starting link");
|
|
}
|
|
|
|
//gettimeofday(&start_time, NULL);
|
|
clock_gettime(CLOCK_MONOTONIC,&start_time);
|
|
script_unsetenv("CONNECT_TIME");
|
|
script_unsetenv("BYTES_SENT");
|
|
script_unsetenv("BYTES_RCVD");
|
|
|
|
lcp_open(0); /* Start protocol */
|
|
//Added by tzzhang, 20110609
|
|
start_link(0);
|
|
/*There is no ifname here in ppp-2.4.5. shnwind 20100111*/
|
|
|
|
/* record start time to file. shnwind 2008.4.17*/
|
|
sprintf(t_tmp,"/tmp/pppuptime-%s%d",PPP_DRV_NAME, ifunit);
|
|
remove(t_tmp);
|
|
fp=fopen(t_tmp,"a");
|
|
if( fp != NULL){
|
|
fprintf(fp,"%d",start_time.tv_sec);
|
|
fclose(fp);
|
|
}
|
|
|
|
while (phase != PHASE_DEAD) {
|
|
handle_events();
|
|
get_input();
|
|
if (kill_link)
|
|
lcp_close(0, "User request");
|
|
if (asked_to_quit) {
|
|
bundle_terminating = 1;
|
|
if (phase == PHASE_MASTER)
|
|
mp_bundle_terminated();
|
|
}
|
|
if (open_ccp_flag) {
|
|
if (phase == PHASE_NETWORK || phase == PHASE_RUNNING) {
|
|
ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */
|
|
(*ccp_protent.open)(0);
|
|
}
|
|
}
|
|
}
|
|
/* restore FSMs to original state */
|
|
lcp_close(0, "");
|
|
|
|
if (!persist || asked_to_quit || (maxfail > 0 && unsuccess >= maxfail))
|
|
{
|
|
#if defined(TC_SUPPORT_3G)
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
if (demand)
|
|
demand_discard();
|
|
//Added by tzzhang, 20110609
|
|
#if !defined(TCSUPPORT_CZ_OTE)
|
|
#if !defined(TCSUPPORT_CZ_H168N)
|
|
t = need_holdoff? holdoff: 0;
|
|
if (holdoff_hook)
|
|
t = (*holdoff_hook)();
|
|
#endif
|
|
#endif
|
|
if (t > 0) {
|
|
new_phase(PHASE_HOLDOFF);
|
|
//Added by tzzhang, 20110609
|
|
#if !defined(TCSUPPORT_CZ_OTE) && !defined(TCSUPPORT_CZ_H168N)
|
|
TIMEOUT(holdoff_end, NULL, t);
|
|
#endif
|
|
do {
|
|
handle_events();
|
|
if (kill_link)
|
|
new_phase(PHASE_DORMANT); /* allow signal to end holdoff */
|
|
} while (phase == PHASE_HOLDOFF);
|
|
if (!persist)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Wait for scripts to finish */
|
|
reap_kids();
|
|
if (n_children > 0) {
|
|
if (child_wait > 0)
|
|
TIMEOUT(childwait_end, NULL, child_wait);
|
|
if (debug) {
|
|
struct subprocess *chp;
|
|
dbglog("Waiting for %d child processes...", n_children);
|
|
for (chp = children; chp != NULL; chp = chp->next)
|
|
dbglog(" script %s, pid %d", chp->prog, chp->pid);
|
|
}
|
|
while (n_children > 0 && !childwait_done) {
|
|
handle_events();
|
|
if (kill_link && !childwait_done)
|
|
childwait_end(NULL);
|
|
}
|
|
}
|
|
|
|
die(status);
|
|
return 0;
|
|
}
|
|
|
|
//Added by tzzhang, 20110609
|
|
|
|
/*
|
|
* handle_events - wait for something to happen and respond to it.
|
|
*/
|
|
static void
|
|
handle_events()
|
|
{
|
|
struct timeval timo;
|
|
|
|
kill_link = open_ccp_flag = 0;
|
|
if (sigsetjmp(sigjmp, 1) == 0) {
|
|
sigprocmask(SIG_BLOCK, &signals_handled, NULL);
|
|
if (got_sighup || got_sigterm || got_sigusr2 || got_sigchld) {
|
|
sigprocmask(SIG_UNBLOCK, &signals_handled, NULL);
|
|
} else {
|
|
waiting = 1;
|
|
sigprocmask(SIG_UNBLOCK, &signals_handled, NULL);
|
|
wait_input(timeleft(&timo));
|
|
}
|
|
}
|
|
waiting = 0;
|
|
calltimeout();
|
|
if (got_sighup) {
|
|
info("Hangup (SIGHUP)");
|
|
kill_link = 1;
|
|
got_sighup = 0;
|
|
if (status != EXIT_HANGUP)
|
|
status = EXIT_USER_REQUEST;
|
|
}
|
|
if (got_sigterm) {
|
|
info("Terminating on signal %d", got_sigterm);
|
|
kill_link = 1;
|
|
asked_to_quit = 1;
|
|
persist = 0;
|
|
status = EXIT_USER_REQUEST;
|
|
got_sigterm = 0;
|
|
}
|
|
if (got_sigchld) {
|
|
got_sigchld = 0;
|
|
reap_kids(); /* Don't leave dead kids lying around */
|
|
}
|
|
if (got_sigusr2) {
|
|
open_ccp_flag = 1;
|
|
got_sigusr2 = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* setup_signals - initialize signal handling.
|
|
*/
|
|
static void
|
|
setup_signals()
|
|
{
|
|
struct sigaction sa;
|
|
|
|
/*
|
|
* Compute mask of all interesting signals and install signal handlers
|
|
* for each. Only one signal handler may be active at a time. Therefore,
|
|
* all other signals should be masked when any handler is executing.
|
|
*/
|
|
sigemptyset(&signals_handled);
|
|
sigaddset(&signals_handled, SIGHUP);
|
|
sigaddset(&signals_handled, SIGINT);
|
|
sigaddset(&signals_handled, SIGTERM);
|
|
sigaddset(&signals_handled, SIGCHLD);
|
|
sigaddset(&signals_handled, SIGUSR2);
|
|
|
|
#define SIGNAL(s, handler) do { \
|
|
sa.sa_handler = handler; \
|
|
if (sigaction(s, &sa, NULL) < 0) \
|
|
fatal("Couldn't establish signal handler (%d): %m", s); \
|
|
} while (0)
|
|
|
|
sa.sa_mask = signals_handled;
|
|
sa.sa_flags = 0;
|
|
SIGNAL(SIGHUP, hup); /* Hangup */
|
|
SIGNAL(SIGINT, term); /* Interrupt */
|
|
SIGNAL(SIGTERM, term); /* Terminate */
|
|
SIGNAL(SIGCHLD, chld);
|
|
|
|
SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */
|
|
SIGNAL(SIGUSR2, open_ccp); /* Reopen CCP */
|
|
|
|
/*
|
|
* Install a handler for other signals which would otherwise
|
|
* cause pppd to exit without cleaning up.
|
|
*/
|
|
SIGNAL(SIGABRT, bad_signal);
|
|
SIGNAL(SIGALRM, bad_signal);
|
|
SIGNAL(SIGFPE, bad_signal);
|
|
SIGNAL(SIGILL, bad_signal);
|
|
SIGNAL(SIGPIPE, bad_signal);
|
|
SIGNAL(SIGQUIT, bad_signal);
|
|
SIGNAL(SIGSEGV, bad_signal);
|
|
#ifdef SIGBUS
|
|
SIGNAL(SIGBUS, bad_signal);
|
|
#endif
|
|
#ifdef SIGEMT
|
|
SIGNAL(SIGEMT, bad_signal);
|
|
#endif
|
|
#ifdef SIGPOLL
|
|
SIGNAL(SIGPOLL, bad_signal);
|
|
#endif
|
|
#ifdef SIGPROF
|
|
SIGNAL(SIGPROF, bad_signal);
|
|
#endif
|
|
#ifdef SIGSYS
|
|
SIGNAL(SIGSYS, bad_signal);
|
|
#endif
|
|
#ifdef SIGTRAP
|
|
SIGNAL(SIGTRAP, bad_signal);
|
|
#endif
|
|
#ifdef SIGVTALRM
|
|
SIGNAL(SIGVTALRM, bad_signal);
|
|
#endif
|
|
#ifdef SIGXCPU
|
|
SIGNAL(SIGXCPU, bad_signal);
|
|
#endif
|
|
#ifdef SIGXFSZ
|
|
SIGNAL(SIGXFSZ, bad_signal);
|
|
#endif
|
|
|
|
/*
|
|
* Apparently we can get a SIGPIPE when we call syslog, if
|
|
* syslogd has died and been restarted. Ignoring it seems
|
|
* be sufficient.
|
|
*/
|
|
signal(SIGPIPE, SIG_IGN);
|
|
}
|
|
|
|
/*
|
|
* set_ifunit - do things we need to do once we know which ppp
|
|
* unit we are using.
|
|
*/
|
|
void
|
|
set_ifunit(iskey)
|
|
int iskey;
|
|
{
|
|
info("Using interface %s%d", PPP_DRV_NAME, ifunit);
|
|
slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
|
|
script_setenv("IFNAME", ifname, iskey);
|
|
if (iskey) {
|
|
create_pidfile(getpid()); /* write pid to file */
|
|
create_linkpidfile(getpid());
|
|
}
|
|
}
|
|
|
|
/*
|
|
* detach - detach us from the controlling terminal.
|
|
*/
|
|
void
|
|
detach()
|
|
{
|
|
int pid;
|
|
char numbuf[16];
|
|
int pipefd[2];
|
|
|
|
if (detached)
|
|
return;
|
|
if (pipe(pipefd) == -1)
|
|
pipefd[0] = pipefd[1] = -1;
|
|
if ((pid = fork()) < 0) {
|
|
error("Couldn't detach (fork failed: %m)");
|
|
die(1); /* or just return? */
|
|
}
|
|
if (pid != 0) {
|
|
/* parent */
|
|
notify(pidchange, pid);
|
|
/* update pid files if they have been written already */
|
|
if (pidfilename[0])
|
|
create_pidfile(pid);
|
|
if (linkpidfile[0])
|
|
create_linkpidfile(pid);
|
|
exit(0); /* parent dies */
|
|
}
|
|
setsid();
|
|
chdir("/");
|
|
dup2(fd_devnull, 0);
|
|
dup2(fd_devnull, 1);
|
|
dup2(fd_devnull, 2);
|
|
detached = 1;
|
|
if (log_default)
|
|
log_to_fd = -1;
|
|
slprintf(numbuf, sizeof(numbuf), "%d", getpid());
|
|
script_setenv("PPPD_PID", numbuf, 1);
|
|
|
|
/* wait for parent to finish updating pid & lock files and die */
|
|
close(pipefd[1]);
|
|
complete_read(pipefd[0], numbuf, 1);
|
|
close(pipefd[0]);
|
|
}
|
|
|
|
/*
|
|
* reopen_log - (re)open our connection to syslog.
|
|
*/
|
|
void
|
|
reopen_log()
|
|
{
|
|
#if !defined(TCSUPPORT_C1_SYSLOG)
|
|
#ifdef TCSUPPORT_SYSLOG_ENHANCE
|
|
openlog( "TCSysLog pppd", 0 , LOG_SYSLOG );
|
|
#else
|
|
openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
|
|
#endif
|
|
setlogmask(LOG_UPTO(LOG_INFO));
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Create a file containing our process ID.
|
|
*/
|
|
static void
|
|
create_pidfile(pid)
|
|
int pid;
|
|
{
|
|
FILE *pidfile;
|
|
|
|
slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid",
|
|
_PATH_VARRUN, ifname);
|
|
if ((pidfile = fopen(pidfilename, "w")) != NULL) {
|
|
fprintf(pidfile, "%d\n", pid);
|
|
(void) fclose(pidfile);
|
|
} else {
|
|
error("Failed to create pid file %s: %m", pidfilename);
|
|
pidfilename[0] = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
create_linkpidfile(pid)
|
|
int pid;
|
|
{
|
|
FILE *pidfile;
|
|
|
|
if (linkname[0] == 0)
|
|
return;
|
|
script_setenv("LINKNAME", linkname, 1);
|
|
slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid",
|
|
_PATH_VARRUN, linkname);
|
|
if ((pidfile = fopen(linkpidfile, "w")) != NULL) {
|
|
fprintf(pidfile, "%d\n", pid);
|
|
if (ifname[0])
|
|
fprintf(pidfile, "%s\n", ifname);
|
|
(void) fclose(pidfile);
|
|
} else {
|
|
error("Failed to create pid file %s: %m", linkpidfile);
|
|
linkpidfile[0] = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* remove_pidfile - remove our pid files
|
|
*/
|
|
void remove_pidfiles()
|
|
{
|
|
if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT)
|
|
warn("unable to delete pid file %s: %m", pidfilename);
|
|
pidfilename[0] = 0;
|
|
if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT)
|
|
warn("unable to delete pid file %s: %m", linkpidfile);
|
|
linkpidfile[0] = 0;
|
|
}
|
|
|
|
/*
|
|
* holdoff_end - called via a timeout when the holdoff period ends.
|
|
*/
|
|
static void
|
|
holdoff_end(arg)
|
|
void *arg;
|
|
{
|
|
new_phase(PHASE_DORMANT);
|
|
}
|
|
|
|
/* List of protocol names, to make our messages a little more informative. */
|
|
struct protocol_list {
|
|
u_short proto;
|
|
const char *name;
|
|
} protocol_list[] = {
|
|
{ 0x21, "IP" },
|
|
{ 0x23, "OSI Network Layer" },
|
|
{ 0x25, "Xerox NS IDP" },
|
|
{ 0x27, "DECnet Phase IV" },
|
|
{ 0x29, "Appletalk" },
|
|
{ 0x2b, "Novell IPX" },
|
|
{ 0x2d, "VJ compressed TCP/IP" },
|
|
{ 0x2f, "VJ uncompressed TCP/IP" },
|
|
{ 0x31, "Bridging PDU" },
|
|
{ 0x33, "Stream Protocol ST-II" },
|
|
{ 0x35, "Banyan Vines" },
|
|
{ 0x39, "AppleTalk EDDP" },
|
|
{ 0x3b, "AppleTalk SmartBuffered" },
|
|
{ 0x3d, "Multi-Link" },
|
|
{ 0x3f, "NETBIOS Framing" },
|
|
{ 0x41, "Cisco Systems" },
|
|
{ 0x43, "Ascom Timeplex" },
|
|
{ 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" },
|
|
{ 0x47, "DCA Remote Lan" },
|
|
{ 0x49, "Serial Data Transport Protocol (PPP-SDTP)" },
|
|
{ 0x4b, "SNA over 802.2" },
|
|
{ 0x4d, "SNA" },
|
|
{ 0x4f, "IP6 Header Compression" },
|
|
{ 0x51, "KNX Bridging Data" },
|
|
{ 0x53, "Encryption" },
|
|
{ 0x55, "Individual Link Encryption" },
|
|
{ 0x57, "IPv6" },
|
|
{ 0x59, "PPP Muxing" },
|
|
{ 0x5b, "Vendor-Specific Network Protocol" },
|
|
{ 0x61, "RTP IPHC Full Header" },
|
|
{ 0x63, "RTP IPHC Compressed TCP" },
|
|
{ 0x65, "RTP IPHC Compressed non-TCP" },
|
|
{ 0x67, "RTP IPHC Compressed UDP 8" },
|
|
{ 0x69, "RTP IPHC Compressed RTP 8" },
|
|
{ 0x6f, "Stampede Bridging" },
|
|
{ 0x73, "MP+" },
|
|
{ 0xc1, "NTCITS IPI" },
|
|
{ 0xfb, "single-link compression" },
|
|
{ 0xfd, "Compressed Datagram" },
|
|
{ 0x0201, "802.1d Hello Packets" },
|
|
{ 0x0203, "IBM Source Routing BPDU" },
|
|
{ 0x0205, "DEC LANBridge100 Spanning Tree" },
|
|
{ 0x0207, "Cisco Discovery Protocol" },
|
|
{ 0x0209, "Netcs Twin Routing" },
|
|
{ 0x020b, "STP - Scheduled Transfer Protocol" },
|
|
{ 0x020d, "EDP - Extreme Discovery Protocol" },
|
|
{ 0x0211, "Optical Supervisory Channel Protocol" },
|
|
{ 0x0213, "Optical Supervisory Channel Protocol" },
|
|
{ 0x0231, "Luxcom" },
|
|
{ 0x0233, "Sigma Network Systems" },
|
|
{ 0x0235, "Apple Client Server Protocol" },
|
|
{ 0x0281, "MPLS Unicast" },
|
|
{ 0x0283, "MPLS Multicast" },
|
|
{ 0x0285, "IEEE p1284.4 standard - data packets" },
|
|
{ 0x0287, "ETSI TETRA Network Protocol Type 1" },
|
|
{ 0x0289, "Multichannel Flow Treatment Protocol" },
|
|
{ 0x2063, "RTP IPHC Compressed TCP No Delta" },
|
|
{ 0x2065, "RTP IPHC Context State" },
|
|
{ 0x2067, "RTP IPHC Compressed UDP 16" },
|
|
{ 0x2069, "RTP IPHC Compressed RTP 16" },
|
|
{ 0x4001, "Cray Communications Control Protocol" },
|
|
{ 0x4003, "CDPD Mobile Network Registration Protocol" },
|
|
{ 0x4005, "Expand accelerator protocol" },
|
|
{ 0x4007, "ODSICP NCP" },
|
|
{ 0x4009, "DOCSIS DLL" },
|
|
{ 0x400B, "Cetacean Network Detection Protocol" },
|
|
{ 0x4021, "Stacker LZS" },
|
|
{ 0x4023, "RefTek Protocol" },
|
|
{ 0x4025, "Fibre Channel" },
|
|
{ 0x4027, "EMIT Protocols" },
|
|
{ 0x405b, "Vendor-Specific Protocol (VSP)" },
|
|
{ 0x8021, "Internet Protocol Control Protocol" },
|
|
{ 0x8023, "OSI Network Layer Control Protocol" },
|
|
{ 0x8025, "Xerox NS IDP Control Protocol" },
|
|
{ 0x8027, "DECnet Phase IV Control Protocol" },
|
|
{ 0x8029, "Appletalk Control Protocol" },
|
|
{ 0x802b, "Novell IPX Control Protocol" },
|
|
{ 0x8031, "Bridging NCP" },
|
|
{ 0x8033, "Stream Protocol Control Protocol" },
|
|
{ 0x8035, "Banyan Vines Control Protocol" },
|
|
{ 0x803d, "Multi-Link Control Protocol" },
|
|
{ 0x803f, "NETBIOS Framing Control Protocol" },
|
|
{ 0x8041, "Cisco Systems Control Protocol" },
|
|
{ 0x8043, "Ascom Timeplex" },
|
|
{ 0x8045, "Fujitsu LBLB Control Protocol" },
|
|
{ 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" },
|
|
{ 0x8049, "Serial Data Control Protocol (PPP-SDCP)" },
|
|
{ 0x804b, "SNA over 802.2 Control Protocol" },
|
|
{ 0x804d, "SNA Control Protocol" },
|
|
{ 0x804f, "IP6 Header Compression Control Protocol" },
|
|
{ 0x8051, "KNX Bridging Control Protocol" },
|
|
{ 0x8053, "Encryption Control Protocol" },
|
|
{ 0x8055, "Individual Link Encryption Control Protocol" },
|
|
{ 0x8057, "IPv6 Control Protocol" },
|
|
{ 0x8059, "PPP Muxing Control Protocol" },
|
|
{ 0x805b, "Vendor-Specific Network Control Protocol (VSNCP)" },
|
|
{ 0x806f, "Stampede Bridging Control Protocol" },
|
|
{ 0x8073, "MP+ Control Protocol" },
|
|
{ 0x80c1, "NTCITS IPI Control Protocol" },
|
|
{ 0x80fb, "Single Link Compression Control Protocol" },
|
|
{ 0x80fd, "Compression Control Protocol" },
|
|
{ 0x8207, "Cisco Discovery Protocol Control" },
|
|
{ 0x8209, "Netcs Twin Routing" },
|
|
{ 0x820b, "STP - Control Protocol" },
|
|
{ 0x820d, "EDPCP - Extreme Discovery Protocol Ctrl Prtcl" },
|
|
{ 0x8235, "Apple Client Server Protocol Control" },
|
|
{ 0x8281, "MPLSCP" },
|
|
{ 0x8285, "IEEE p1284.4 standard - Protocol Control" },
|
|
{ 0x8287, "ETSI TETRA TNP1 Control Protocol" },
|
|
{ 0x8289, "Multichannel Flow Treatment Protocol" },
|
|
{ 0xc021, "Link Control Protocol" },
|
|
{ 0xc023, "Password Authentication Protocol" },
|
|
{ 0xc025, "Link Quality Report" },
|
|
{ 0xc027, "Shiva Password Authentication Protocol" },
|
|
{ 0xc029, "CallBack Control Protocol (CBCP)" },
|
|
{ 0xc02b, "BACP Bandwidth Allocation Control Protocol" },
|
|
{ 0xc02d, "BAP" },
|
|
{ 0xc05b, "Vendor-Specific Authentication Protocol (VSAP)" },
|
|
{ 0xc081, "Container Control Protocol" },
|
|
{ 0xc223, "Challenge Handshake Authentication Protocol" },
|
|
{ 0xc225, "RSA Authentication Protocol" },
|
|
{ 0xc227, "Extensible Authentication Protocol" },
|
|
{ 0xc229, "Mitsubishi Security Info Exch Ptcl (SIEP)" },
|
|
{ 0xc26f, "Stampede Bridging Authorization Protocol" },
|
|
{ 0xc281, "Proprietary Authentication Protocol" },
|
|
{ 0xc283, "Proprietary Authentication Protocol" },
|
|
{ 0xc481, "Proprietary Node ID Authentication Protocol" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
/*
|
|
* protocol_name - find a name for a PPP protocol.
|
|
*/
|
|
const char *
|
|
protocol_name(proto)
|
|
int proto;
|
|
{
|
|
struct protocol_list *lp;
|
|
|
|
for (lp = protocol_list; lp->proto != 0; ++lp)
|
|
if (proto == lp->proto)
|
|
return lp->name;
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* get_input - called when incoming data is available.
|
|
*/
|
|
static void
|
|
get_input()
|
|
{
|
|
int len, i;
|
|
u_char *p;
|
|
u_short protocol;
|
|
struct protent *protp;
|
|
|
|
p = inpacket_buf; /* point to beginning of packet buffer */
|
|
|
|
len = read_packet(inpacket_buf);
|
|
if (len < 0)
|
|
return;
|
|
|
|
if (len == 0) {
|
|
if (bundle_eof && multilink_master) {
|
|
notice("Last channel has disconnected");
|
|
mp_bundle_terminated();
|
|
return;
|
|
}
|
|
notice("Modem hangup");
|
|
hungup = 1;
|
|
status = EXIT_HANGUP;
|
|
lcp_lowerdown(0); /* serial link is no longer available */
|
|
link_terminated(0);
|
|
return;
|
|
}
|
|
|
|
if (len < PPP_HDRLEN) {
|
|
dbglog("received short packet:%.*B", len, p);
|
|
return;
|
|
}
|
|
|
|
dump_packet("rcvd", p, len);
|
|
if (snoop_recv_hook) snoop_recv_hook(p, len);
|
|
|
|
p += 2; /* Skip address and control */
|
|
GETSHORT(protocol, p);
|
|
len -= PPP_HDRLEN;
|
|
|
|
/*
|
|
* Toss all non-LCP packets unless LCP is OPEN.
|
|
*/
|
|
if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) {
|
|
dbglog("Discarded non-LCP packet when LCP not open");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Until we get past the authentication phase, toss all packets
|
|
* except LCP, LQR and authentication packets.
|
|
*/
|
|
if (phase <= PHASE_AUTHENTICATE
|
|
&& !(protocol == PPP_LCP || protocol == PPP_LQR
|
|
|| protocol == PPP_PAP || protocol == PPP_CHAP ||
|
|
protocol == PPP_EAP)) {
|
|
dbglog("discarding proto 0x%x in phase %d",
|
|
protocol, phase);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Upcall the proper protocol input routine.
|
|
*/
|
|
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
|
if (protp->protocol == protocol && protp->enabled_flag) {
|
|
(*protp->input)(0, p, len);
|
|
return;
|
|
}
|
|
if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
|
|
&& protp->datainput != NULL) {
|
|
(*protp->datainput)(0, p, len);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (debug) {
|
|
const char *pname = protocol_name(protocol);
|
|
if (pname != NULL)
|
|
warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
|
|
else
|
|
warn("Unsupported protocol 0x%x received", protocol);
|
|
}
|
|
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
|
|
}
|
|
|
|
/*
|
|
* ppp_send_config - configure the transmit-side characteristics of
|
|
* the ppp interface. Returns -1, indicating an error, if the channel
|
|
* send_config procedure called error() (or incremented error_count
|
|
* itself), otherwise 0.
|
|
*/
|
|
int
|
|
ppp_send_config(unit, mtu, accm, pcomp, accomp)
|
|
int unit, mtu;
|
|
u_int32_t accm;
|
|
int pcomp, accomp;
|
|
{
|
|
int errs;
|
|
|
|
if (the_channel->send_config == NULL)
|
|
return 0;
|
|
errs = error_count;
|
|
(*the_channel->send_config)(mtu, accm, pcomp, accomp);
|
|
return (error_count != errs)? -1: 0;
|
|
}
|
|
|
|
/*
|
|
* ppp_recv_config - configure the receive-side characteristics of
|
|
* the ppp interface. Returns -1, indicating an error, if the channel
|
|
* recv_config procedure called error() (or incremented error_count
|
|
* itself), otherwise 0.
|
|
*/
|
|
int
|
|
ppp_recv_config(unit, mru, accm, pcomp, accomp)
|
|
int unit, mru;
|
|
u_int32_t accm;
|
|
int pcomp, accomp;
|
|
{
|
|
int errs;
|
|
|
|
if (the_channel->recv_config == NULL)
|
|
return 0;
|
|
errs = error_count;
|
|
(*the_channel->recv_config)(mru, accm, pcomp, accomp);
|
|
return (error_count != errs)? -1: 0;
|
|
}
|
|
|
|
/*
|
|
* new_phase - signal the start of a new phase of pppd's operation.
|
|
*/
|
|
void
|
|
new_phase(p)
|
|
int p;
|
|
{
|
|
phase = p;
|
|
if (new_phase_hook)
|
|
(*new_phase_hook)(p);
|
|
notify(phasechange, p);
|
|
}
|
|
|
|
/*
|
|
* die - clean up state and exit with the specified status.
|
|
*/
|
|
void
|
|
die(status)
|
|
int status;
|
|
{
|
|
if (!doing_multilink || multilink_master)
|
|
print_link_stats();
|
|
cleanup();
|
|
notify(exitnotify, status);
|
|
syslog(LOG_INFO, "Exit.");
|
|
exit(status);
|
|
}
|
|
|
|
/*
|
|
* cleanup - restore anything which needs to be restored before we exit
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
cleanup()
|
|
{
|
|
sys_cleanup();
|
|
|
|
if (fd_ppp >= 0)
|
|
the_channel->disestablish_ppp(devfd);
|
|
if (the_channel->cleanup)
|
|
(*the_channel->cleanup)();
|
|
remove_pidfiles();
|
|
|
|
#ifdef USE_TDB
|
|
if (pppdb != NULL)
|
|
cleanup_db();
|
|
#endif
|
|
|
|
}
|
|
|
|
void
|
|
print_link_stats()
|
|
{
|
|
/*
|
|
* Print connect time and statistics.
|
|
*/
|
|
if (link_stats_valid) {
|
|
int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */
|
|
info("Connect time %d.%d minutes.", t/10, t%10);
|
|
info("Sent %u bytes, received %u bytes.",
|
|
link_stats.bytes_out, link_stats.bytes_in);
|
|
link_stats_valid = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* reset_link_stats - "reset" stats when link goes up.
|
|
*/
|
|
void
|
|
reset_link_stats(u)
|
|
int u;
|
|
{
|
|
if (!get_ppp_stats(u, &old_link_stats))
|
|
return;
|
|
//gettimeofday(&start_time, NULL);
|
|
clock_gettime(CLOCK_MONOTONIC,&start_time);
|
|
|
|
}
|
|
|
|
/*
|
|
* update_link_stats - get stats at link termination.
|
|
*/
|
|
void
|
|
update_link_stats(u)
|
|
int u;
|
|
{
|
|
struct timeval now;
|
|
char numbuf[32],t_tmp[32];
|
|
|
|
/* remove this record file at link termination.shnwind 2008.4.17*/
|
|
sprintf(t_tmp,"/tmp/pppuptime-%s%d",PPP_DRV_NAME, ifunit);
|
|
remove(t_tmp);
|
|
|
|
if (!get_ppp_stats(u, &link_stats)
|
|
|| clock_gettime(CLOCK_MONOTONIC,&now) < 0)
|
|
return;
|
|
link_connect_time = now.tv_sec - start_time.tv_sec;
|
|
link_stats_valid = 1;
|
|
|
|
link_stats.bytes_in -= old_link_stats.bytes_in;
|
|
link_stats.bytes_out -= old_link_stats.bytes_out;
|
|
link_stats.pkts_in -= old_link_stats.pkts_in;
|
|
link_stats.pkts_out -= old_link_stats.pkts_out;
|
|
|
|
slprintf(numbuf, sizeof(numbuf), "%u", link_connect_time);
|
|
script_setenv("CONNECT_TIME", numbuf, 0);
|
|
slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_out);
|
|
script_setenv("BYTES_SENT", numbuf, 0);
|
|
slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_in);
|
|
script_setenv("BYTES_RCVD", numbuf, 0);
|
|
}
|
|
|
|
|
|
struct callout {
|
|
struct timeval c_time; /* time at which to call routine */
|
|
void *c_arg; /* argument to routine */
|
|
void (*c_func) __P((void *)); /* routine */
|
|
struct callout *c_next;
|
|
};
|
|
|
|
static struct callout *callout = NULL; /* Callout list */
|
|
static struct timeval timenow; /* Current time */
|
|
|
|
/*
|
|
* timeout - Schedule a timeout.
|
|
*/
|
|
void
|
|
timeout(func, arg, secs, usecs)
|
|
void (*func) __P((void *));
|
|
void *arg;
|
|
int secs, usecs;
|
|
{
|
|
struct callout *newp, *p, **pp;
|
|
|
|
/*
|
|
* Allocate timeout.
|
|
*/
|
|
if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL)
|
|
fatal("Out of memory in timeout()!");
|
|
newp->c_arg = arg;
|
|
newp->c_func = func;
|
|
gettimeofday(&timenow, NULL);
|
|
newp->c_time.tv_sec = timenow.tv_sec + secs;
|
|
newp->c_time.tv_usec = timenow.tv_usec + usecs;
|
|
if (newp->c_time.tv_usec >= 1000000) {
|
|
newp->c_time.tv_sec += newp->c_time.tv_usec / 1000000;
|
|
newp->c_time.tv_usec %= 1000000;
|
|
}
|
|
|
|
/*
|
|
* Find correct place and link it in.
|
|
*/
|
|
for (pp = &callout; (p = *pp); pp = &p->c_next)
|
|
if (newp->c_time.tv_sec < p->c_time.tv_sec
|
|
|| (newp->c_time.tv_sec == p->c_time.tv_sec
|
|
&& newp->c_time.tv_usec < p->c_time.tv_usec))
|
|
break;
|
|
newp->c_next = p;
|
|
*pp = newp;
|
|
}
|
|
|
|
|
|
/*
|
|
* untimeout - Unschedule a timeout.
|
|
*/
|
|
void
|
|
untimeout(func, arg)
|
|
void (*func) __P((void *));
|
|
void *arg;
|
|
{
|
|
struct callout **copp, *freep;
|
|
|
|
/*
|
|
* Find first matching timeout and remove it from the list.
|
|
*/
|
|
for (copp = &callout; (freep = *copp); copp = &freep->c_next)
|
|
if (freep->c_func == func && freep->c_arg == arg) {
|
|
*copp = freep->c_next;
|
|
free((char *) freep);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* calltimeout - Call any timeout routines which are now due.
|
|
*/
|
|
static void
|
|
calltimeout()
|
|
{
|
|
struct callout *p;
|
|
|
|
while (callout != NULL) {
|
|
p = callout;
|
|
|
|
if (gettimeofday(&timenow, NULL) < 0)
|
|
fatal("Failed to get time of day: %m");
|
|
if (!(p->c_time.tv_sec < timenow.tv_sec
|
|
|| (p->c_time.tv_sec == timenow.tv_sec
|
|
&& p->c_time.tv_usec <= timenow.tv_usec)))
|
|
break; /* no, it's not time yet */
|
|
|
|
callout = p->c_next;
|
|
(*p->c_func)(p->c_arg);
|
|
|
|
free((char *) p);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* timeleft - return the length of time until the next timeout is due.
|
|
*/
|
|
static struct timeval *
|
|
timeleft(tvp)
|
|
struct timeval *tvp;
|
|
{
|
|
if (callout == NULL)
|
|
return NULL;
|
|
|
|
gettimeofday(&timenow, NULL);
|
|
tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec;
|
|
tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec;
|
|
if (tvp->tv_usec < 0) {
|
|
tvp->tv_usec += 1000000;
|
|
tvp->tv_sec -= 1;
|
|
}
|
|
if (tvp->tv_sec < 0)
|
|
tvp->tv_sec = tvp->tv_usec = 0;
|
|
|
|
return tvp;
|
|
}
|
|
|
|
|
|
/*
|
|
* kill_my_pg - send a signal to our process group, and ignore it ourselves.
|
|
* We assume that sig is currently blocked.
|
|
*/
|
|
static void
|
|
kill_my_pg(sig)
|
|
int sig;
|
|
{
|
|
struct sigaction act, oldact;
|
|
struct subprocess *chp;
|
|
|
|
if (!detached) {
|
|
/*
|
|
* There might be other things in our process group that we
|
|
* didn't start that would get hit if we did a kill(0), so
|
|
* just send the signal individually to our children.
|
|
*/
|
|
for (chp = children; chp != NULL; chp = chp->next)
|
|
if (chp->killable)
|
|
kill(chp->pid, sig);
|
|
return;
|
|
}
|
|
|
|
/* We've done a setsid(), so we can just use a kill(0) */
|
|
sigemptyset(&act.sa_mask); /* unnecessary in fact */
|
|
act.sa_handler = SIG_IGN;
|
|
act.sa_flags = 0;
|
|
kill(0, sig);
|
|
/*
|
|
* The kill() above made the signal pending for us, as well as
|
|
* the rest of our process group, but we don't want it delivered
|
|
* to us. It is blocked at the moment. Setting it to be ignored
|
|
* will cause the pending signal to be discarded. If we did the
|
|
* kill() after setting the signal to be ignored, it is unspecified
|
|
* (by POSIX) whether the signal is immediately discarded or left
|
|
* pending, and in fact Linux would leave it pending, and so it
|
|
* would be delivered after the current signal handler exits,
|
|
* leading to an infinite loop.
|
|
*/
|
|
sigaction(sig, &act, &oldact);
|
|
sigaction(sig, &oldact, NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
* hup - Catch SIGHUP signal.
|
|
*
|
|
* Indicates that the physical layer has been disconnected.
|
|
* We don't rely on this indication; if the user has sent this
|
|
* signal, we just take the link down.
|
|
*/
|
|
static void
|
|
hup(sig)
|
|
int sig;
|
|
{
|
|
/* can't log a message here, it can deadlock */
|
|
got_sighup = 1;
|
|
if (conn_running)
|
|
/* Send the signal to the [dis]connector process(es) also */
|
|
kill_my_pg(sig);
|
|
notify(sigreceived, sig);
|
|
if (waiting)
|
|
siglongjmp(sigjmp, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* term - Catch SIGTERM signal and SIGINT signal (^C/del).
|
|
*
|
|
* Indicates that we should initiate a graceful disconnect and exit.
|
|
*/
|
|
/*ARGSUSED*/
|
|
static void
|
|
term(sig)
|
|
int sig;
|
|
{
|
|
/* can't log a message here, it can deadlock */
|
|
got_sigterm = sig;
|
|
if (conn_running)
|
|
/* Send the signal to the [dis]connector process(es) also */
|
|
kill_my_pg(sig);
|
|
notify(sigreceived, sig);
|
|
if (waiting)
|
|
siglongjmp(sigjmp, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* chld - Catch SIGCHLD signal.
|
|
* Sets a flag so we will call reap_kids in the mainline.
|
|
*/
|
|
static void
|
|
chld(sig)
|
|
int sig;
|
|
{
|
|
got_sigchld = 1;
|
|
if (waiting)
|
|
siglongjmp(sigjmp, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* toggle_debug - Catch SIGUSR1 signal.
|
|
*
|
|
* Toggle debug flag.
|
|
*/
|
|
/*ARGSUSED*/
|
|
static void
|
|
toggle_debug(sig)
|
|
int sig;
|
|
{
|
|
debug = !debug;
|
|
if (debug) {
|
|
setlogmask(LOG_UPTO(LOG_DEBUG));
|
|
} else {
|
|
setlogmask(LOG_UPTO(LOG_WARNING));
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* open_ccp - Catch SIGUSR2 signal.
|
|
*
|
|
* Try to (re)negotiate compression.
|
|
*/
|
|
/*ARGSUSED*/
|
|
static void
|
|
open_ccp(sig)
|
|
int sig;
|
|
{
|
|
got_sigusr2 = 1;
|
|
if (waiting)
|
|
siglongjmp(sigjmp, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* bad_signal - We've caught a fatal signal. Clean up state and exit.
|
|
*/
|
|
static void
|
|
bad_signal(sig)
|
|
int sig;
|
|
{
|
|
static int crashed = 0;
|
|
|
|
if (crashed)
|
|
_exit(127);
|
|
crashed = 1;
|
|
error("Fatal signal %d", sig);
|
|
if (conn_running)
|
|
kill_my_pg(SIGTERM);
|
|
notify(sigreceived, sig);
|
|
die(127);
|
|
}
|
|
|
|
/*
|
|
* safe_fork - Create a child process. The child closes all the
|
|
* file descriptors that we don't want to leak to a script.
|
|
* The parent waits for the child to do this before returning.
|
|
* This also arranges for the specified fds to be dup'd to
|
|
* fds 0, 1, 2 in the child.
|
|
*/
|
|
pid_t
|
|
safe_fork(int infd, int outfd, int errfd)
|
|
{
|
|
pid_t pid;
|
|
int fd, pipefd[2];
|
|
char buf[1];
|
|
|
|
/* make sure fds 0, 1, 2 are occupied (probably not necessary) */
|
|
while ((fd = dup(fd_devnull)) >= 0) {
|
|
if (fd > 2) {
|
|
close(fd);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (pipe(pipefd) == -1)
|
|
pipefd[0] = pipefd[1] = -1;
|
|
pid = fork();
|
|
if (pid < 0) {
|
|
error("fork failed: %m");
|
|
return -1;
|
|
}
|
|
if (pid > 0) {
|
|
/* parent */
|
|
close(pipefd[1]);
|
|
/* this read() blocks until the close(pipefd[1]) below */
|
|
complete_read(pipefd[0], buf, 1);
|
|
close(pipefd[0]);
|
|
return pid;
|
|
}
|
|
|
|
/* Executing in the child */
|
|
sys_close();
|
|
#ifdef USE_TDB
|
|
tdb_close(pppdb);
|
|
#endif
|
|
|
|
/* make sure infd, outfd and errfd won't get tromped on below */
|
|
if (infd == 1 || infd == 2)
|
|
infd = dup(infd);
|
|
if (outfd == 0 || outfd == 2)
|
|
outfd = dup(outfd);
|
|
if (errfd == 0 || errfd == 1)
|
|
errfd = dup(errfd);
|
|
|
|
closelog();
|
|
|
|
/* dup the in, out, err fds to 0, 1, 2 */
|
|
if (infd != 0)
|
|
dup2(infd, 0);
|
|
if (outfd != 1)
|
|
dup2(outfd, 1);
|
|
if (errfd != 2)
|
|
dup2(errfd, 2);
|
|
|
|
if (log_to_fd > 2)
|
|
close(log_to_fd);
|
|
if (the_channel->close)
|
|
(*the_channel->close)();
|
|
else
|
|
close(devfd); /* some plugins don't have a close function */
|
|
close(fd_ppp);
|
|
close(fd_devnull);
|
|
if (infd != 0)
|
|
close(infd);
|
|
if (outfd != 1)
|
|
close(outfd);
|
|
if (errfd != 2)
|
|
close(errfd);
|
|
|
|
notify(fork_notifier, 0);
|
|
close(pipefd[0]);
|
|
/* this close unblocks the read() call above in the parent */
|
|
close(pipefd[1]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* device_script - run a program to talk to the specified fds
|
|
* (e.g. to run the connector or disconnector script).
|
|
* stderr gets connected to the log fd or to the _PATH_CONNERRS file.
|
|
*/
|
|
int
|
|
device_script(program, in, out, dont_wait)
|
|
char *program;
|
|
int in, out;
|
|
int dont_wait;
|
|
{
|
|
int pid;
|
|
int status = -1;
|
|
int errfd;
|
|
|
|
if (log_to_fd >= 0)
|
|
errfd = log_to_fd;
|
|
else
|
|
errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0600);
|
|
|
|
++conn_running;
|
|
pid = safe_fork(in, out, errfd);
|
|
|
|
if (pid != 0 && log_to_fd < 0)
|
|
close(errfd);
|
|
|
|
if (pid < 0) {
|
|
--conn_running;
|
|
error("Failed to create child process: %m");
|
|
return -1;
|
|
}
|
|
|
|
if (pid != 0) {
|
|
record_child(pid, program, NULL, NULL, 1);
|
|
status = 0;
|
|
if (!dont_wait) {
|
|
while (waitpid(pid, &status, 0) < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
fatal("error waiting for (dis)connection process: %m");
|
|
}
|
|
forget_child(pid, status);
|
|
--conn_running;
|
|
}
|
|
return (status == 0 ? 0 : -1);
|
|
}
|
|
|
|
/* here we are executing in the child */
|
|
|
|
setgid(getgid());
|
|
setuid(uid);
|
|
if (getuid() != uid) {
|
|
fprintf(stderr, "pppd: setuid failed\n");
|
|
exit(1);
|
|
}
|
|
execl("/bin/sh", "sh", "-c", program, (char *)0);
|
|
perror("pppd: could not exec /bin/sh");
|
|
exit(99);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
|
|
/*
|
|
* run_program - execute a program with given arguments,
|
|
* but don't wait for it unless wait is non-zero.
|
|
* If the program can't be executed, logs an error unless
|
|
* must_exist is 0 and the program file doesn't exist.
|
|
* Returns -1 if it couldn't fork, 0 if the file doesn't exist
|
|
* or isn't an executable plain file, or the process ID of the child.
|
|
* If done != NULL, (*done)(arg) will be called later (within
|
|
* reap_kids) iff the return value is > 0.
|
|
*/
|
|
pid_t
|
|
run_program(prog, args, must_exist, done, arg, wait)
|
|
char *prog;
|
|
char **args;
|
|
int must_exist;
|
|
void (*done) __P((void *));
|
|
void *arg;
|
|
int wait;
|
|
{
|
|
int pid, status;
|
|
struct stat sbuf;
|
|
|
|
/*
|
|
* First check if the file exists and is executable.
|
|
* We don't use access() because that would use the
|
|
* real user-id, which might not be root, and the script
|
|
* might be accessible only to root.
|
|
*/
|
|
errno = EINVAL;
|
|
if (stat(prog, &sbuf) < 0 || !S_ISREG(sbuf.st_mode)
|
|
|| (sbuf.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0) {
|
|
if (must_exist || errno != ENOENT)
|
|
warn("Can't execute %s: %m", prog);
|
|
return 0;
|
|
}
|
|
|
|
pid = safe_fork(fd_devnull, fd_devnull, fd_devnull);
|
|
if (pid == -1) {
|
|
error("Failed to create child process for %s: %m", prog);
|
|
return -1;
|
|
}
|
|
if (pid != 0) {
|
|
if (debug)
|
|
dbglog("Script %s started (pid %d)", prog, pid);
|
|
record_child(pid, prog, done, arg, 0);
|
|
if (wait) {
|
|
while (waitpid(pid, &status, 0) < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
fatal("error waiting for script %s: %m", prog);
|
|
}
|
|
forget_child(pid, status);
|
|
}
|
|
return pid;
|
|
}
|
|
|
|
/* Leave the current location */
|
|
(void) setsid(); /* No controlling tty. */
|
|
(void) umask (S_IRWXG|S_IRWXO);
|
|
(void) chdir ("/"); /* no current directory. */
|
|
setuid(0); /* set real UID = root */
|
|
setgid(getegid());
|
|
|
|
#ifdef BSD
|
|
/* Force the priority back to zero if pppd is running higher. */
|
|
if (setpriority (PRIO_PROCESS, 0, 0) < 0)
|
|
warn("can't reset priority to 0: %m");
|
|
#endif
|
|
|
|
/* run the program */
|
|
execve(prog, args, script_env);
|
|
if (must_exist || errno != ENOENT) {
|
|
/* have to reopen the log, there's nowhere else
|
|
for the message to go. */
|
|
reopen_log();
|
|
syslog(LOG_ERR, "Can't execute %s: %m", prog);
|
|
closelog();
|
|
}
|
|
_exit(-1);
|
|
}
|
|
|
|
|
|
/*
|
|
* record_child - add a child process to the list for reap_kids
|
|
* to use.
|
|
*/
|
|
void
|
|
record_child(pid, prog, done, arg, killable)
|
|
int pid;
|
|
char *prog;
|
|
void (*done) __P((void *));
|
|
void *arg;
|
|
int killable;
|
|
{
|
|
struct subprocess *chp;
|
|
|
|
++n_children;
|
|
|
|
chp = (struct subprocess *) malloc(sizeof(struct subprocess));
|
|
if (chp == NULL) {
|
|
warn("losing track of %s process", prog);
|
|
} else {
|
|
chp->pid = pid;
|
|
chp->prog = prog;
|
|
chp->done = done;
|
|
chp->arg = arg;
|
|
chp->next = children;
|
|
chp->killable = killable;
|
|
children = chp;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* childwait_end - we got fed up waiting for the child processes to
|
|
* exit, send them all a SIGTERM.
|
|
*/
|
|
static void
|
|
childwait_end(arg)
|
|
void *arg;
|
|
{
|
|
struct subprocess *chp;
|
|
|
|
for (chp = children; chp != NULL; chp = chp->next) {
|
|
if (debug)
|
|
dbglog("sending SIGTERM to process %d", chp->pid);
|
|
kill(chp->pid, SIGTERM);
|
|
}
|
|
childwait_done = 1;
|
|
}
|
|
|
|
/*
|
|
* forget_child - clean up after a dead child
|
|
*/
|
|
static void
|
|
forget_child(pid, status)
|
|
int pid, status;
|
|
{
|
|
struct subprocess *chp, **prevp;
|
|
|
|
for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next) {
|
|
if (chp->pid == pid) {
|
|
--n_children;
|
|
*prevp = chp->next;
|
|
break;
|
|
}
|
|
}
|
|
if (WIFSIGNALED(status)) {
|
|
warn("Child process %s (pid %d) terminated with signal %d",
|
|
(chp? chp->prog: "??"), pid, WTERMSIG(status));
|
|
} else if (debug)
|
|
dbglog("Script %s finished (pid %d), status = 0x%x",
|
|
(chp? chp->prog: "??"), pid,
|
|
WIFEXITED(status) ? WEXITSTATUS(status) : status);
|
|
if (chp && chp->done)
|
|
(*chp->done)(chp->arg);
|
|
if (chp)
|
|
free(chp);
|
|
}
|
|
|
|
/*
|
|
* reap_kids - get status from any dead child processes,
|
|
* and log a message for abnormal terminations.
|
|
*/
|
|
static int
|
|
reap_kids()
|
|
{
|
|
int pid, status;
|
|
|
|
if (n_children == 0)
|
|
return 0;
|
|
while ((pid = waitpid(-1, &status, WNOHANG)) != -1 && pid != 0) {
|
|
forget_child(pid, status);
|
|
}
|
|
if (pid == -1) {
|
|
if (errno == ECHILD)
|
|
return -1;
|
|
if (errno != EINTR)
|
|
error("Error waiting for child process: %m");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* add_notifier - add a new function to be called when something happens.
|
|
*/
|
|
void
|
|
add_notifier(notif, func, arg)
|
|
struct notifier **notif;
|
|
notify_func func;
|
|
void *arg;
|
|
{
|
|
struct notifier *np;
|
|
|
|
np = malloc(sizeof(struct notifier));
|
|
if (np == 0)
|
|
novm("notifier struct");
|
|
np->next = *notif;
|
|
np->func = func;
|
|
np->arg = arg;
|
|
*notif = np;
|
|
}
|
|
|
|
/*
|
|
* remove_notifier - remove a function from the list of things to
|
|
* be called when something happens.
|
|
*/
|
|
void
|
|
remove_notifier(notif, func, arg)
|
|
struct notifier **notif;
|
|
notify_func func;
|
|
void *arg;
|
|
{
|
|
struct notifier *np;
|
|
|
|
for (; (np = *notif) != 0; notif = &np->next) {
|
|
if (np->func == func && np->arg == arg) {
|
|
*notif = np->next;
|
|
free(np);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* notify - call a set of functions registered with add_notifier.
|
|
*/
|
|
void
|
|
notify(notif, val)
|
|
struct notifier *notif;
|
|
int val;
|
|
{
|
|
struct notifier *np;
|
|
|
|
while ((np = notif) != 0) {
|
|
notif = np->next;
|
|
(*np->func)(np->arg, val);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* novm - log an error message saying we ran out of memory, and die.
|
|
*/
|
|
void
|
|
novm(msg)
|
|
char *msg;
|
|
{
|
|
fatal("Virtual memory exhausted allocating %s\n", msg);
|
|
}
|
|
|
|
/*
|
|
* script_setenv - set an environment variable value to be used
|
|
* for scripts that we run (e.g. ip-up, auth-up, etc.)
|
|
*/
|
|
void
|
|
script_setenv(var, value, iskey)
|
|
char *var, *value;
|
|
int iskey;
|
|
{
|
|
size_t varl = strlen(var);
|
|
size_t vl = varl + strlen(value) + 2;
|
|
int i;
|
|
char *p, *newstring;
|
|
|
|
newstring = (char *) malloc(vl+1);
|
|
if (newstring == 0)
|
|
return;
|
|
*newstring++ = iskey;
|
|
slprintf(newstring, vl, "%s=%s", var, value);
|
|
|
|
/* check if this variable is already set */
|
|
if (script_env != 0) {
|
|
for (i = 0; (p = script_env[i]) != 0; ++i) {
|
|
if (strncmp(p, var, varl) == 0 && p[varl] == '=') {
|
|
#ifdef USE_TDB
|
|
if (p[-1] && pppdb != NULL)
|
|
delete_db_key(p);
|
|
#endif
|
|
free(p-1);
|
|
script_env[i] = newstring;
|
|
#ifdef USE_TDB
|
|
if (iskey && pppdb != NULL)
|
|
add_db_key(newstring);
|
|
update_db_entry();
|
|
#endif
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
/* no space allocated for script env. ptrs. yet */
|
|
i = 0;
|
|
script_env = (char **) malloc(16 * sizeof(char *));
|
|
if (script_env == 0)
|
|
return;
|
|
s_env_nalloc = 16;
|
|
}
|
|
|
|
/* reallocate script_env with more space if needed */
|
|
if (i + 1 >= s_env_nalloc) {
|
|
int new_n = i + 17;
|
|
char **newenv = (char **) realloc((void *)script_env,
|
|
new_n * sizeof(char *));
|
|
if (newenv == 0)
|
|
return;
|
|
script_env = newenv;
|
|
s_env_nalloc = new_n;
|
|
}
|
|
|
|
script_env[i] = newstring;
|
|
script_env[i+1] = 0;
|
|
|
|
#ifdef USE_TDB
|
|
if (pppdb != NULL) {
|
|
if (iskey)
|
|
add_db_key(newstring);
|
|
update_db_entry();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* script_unsetenv - remove a variable from the environment
|
|
* for scripts.
|
|
*/
|
|
void
|
|
script_unsetenv(var)
|
|
char *var;
|
|
{
|
|
int vl = strlen(var);
|
|
int i;
|
|
char *p;
|
|
|
|
if (script_env == 0)
|
|
return;
|
|
for (i = 0; (p = script_env[i]) != 0; ++i) {
|
|
if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
|
|
#ifdef USE_TDB
|
|
if (p[-1] && pppdb != NULL)
|
|
delete_db_key(p);
|
|
#endif
|
|
free(p-1);
|
|
while ((script_env[i] = script_env[i+1]) != 0)
|
|
++i;
|
|
break;
|
|
}
|
|
}
|
|
#ifdef USE_TDB
|
|
if (pppdb != NULL)
|
|
update_db_entry();
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Any arbitrary string used as a key for locking the database.
|
|
* It doesn't matter what it is as long as all pppds use the same string.
|
|
*/
|
|
#define PPPD_LOCK_KEY "pppd lock"
|
|
|
|
/*
|
|
* lock_db - get an exclusive lock on the TDB database.
|
|
* Used to ensure atomicity of various lookup/modify operations.
|
|
*/
|
|
void lock_db()
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{
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#ifdef USE_TDB
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TDB_DATA key;
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|
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key.dptr = PPPD_LOCK_KEY;
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key.dsize = strlen(key.dptr);
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tdb_chainlock(pppdb, key);
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#endif
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}
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|
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/*
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* unlock_db - remove the exclusive lock obtained by lock_db.
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|
*/
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|
void unlock_db()
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|
{
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|
#ifdef USE_TDB
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|
TDB_DATA key;
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|
|
|
key.dptr = PPPD_LOCK_KEY;
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|
key.dsize = strlen(key.dptr);
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tdb_chainunlock(pppdb, key);
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#endif
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|
}
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|
|
|
#ifdef USE_TDB
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|
/*
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|
* update_db_entry - update our entry in the database.
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|
*/
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|
static void
|
|
update_db_entry()
|
|
{
|
|
TDB_DATA key, dbuf;
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|
int vlen, i;
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|
char *p, *q, *vbuf;
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|
|
|
if (script_env == NULL)
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|
return;
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|
vlen = 0;
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|
for (i = 0; (p = script_env[i]) != 0; ++i)
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|
vlen += strlen(p) + 1;
|
|
vbuf = malloc(vlen + 1);
|
|
if (vbuf == 0)
|
|
novm("database entry");
|
|
q = vbuf;
|
|
for (i = 0; (p = script_env[i]) != 0; ++i)
|
|
q += slprintf(q, vbuf + vlen - q, "%s;", p);
|
|
|
|
key.dptr = db_key;
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|
key.dsize = strlen(db_key);
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|
dbuf.dptr = vbuf;
|
|
dbuf.dsize = vlen;
|
|
if (tdb_store(pppdb, key, dbuf, TDB_REPLACE))
|
|
error("tdb_store failed: %s", tdb_errorstr(pppdb));
|
|
|
|
if (vbuf)
|
|
free(vbuf);
|
|
|
|
}
|
|
|
|
/*
|
|
* add_db_key - add a key that we can use to look up our database entry.
|
|
*/
|
|
static void
|
|
add_db_key(str)
|
|
const char *str;
|
|
{
|
|
TDB_DATA key, dbuf;
|
|
|
|
key.dptr = (char *) str;
|
|
key.dsize = strlen(str);
|
|
dbuf.dptr = db_key;
|
|
dbuf.dsize = strlen(db_key);
|
|
if (tdb_store(pppdb, key, dbuf, TDB_REPLACE))
|
|
error("tdb_store key failed: %s", tdb_errorstr(pppdb));
|
|
}
|
|
|
|
/*
|
|
* delete_db_key - delete a key for looking up our database entry.
|
|
*/
|
|
static void
|
|
delete_db_key(str)
|
|
const char *str;
|
|
{
|
|
TDB_DATA key;
|
|
|
|
key.dptr = (char *) str;
|
|
key.dsize = strlen(str);
|
|
tdb_delete(pppdb, key);
|
|
}
|
|
|
|
/*
|
|
* cleanup_db - delete all the entries we put in the database.
|
|
*/
|
|
static void
|
|
cleanup_db()
|
|
{
|
|
TDB_DATA key;
|
|
int i;
|
|
char *p;
|
|
|
|
key.dptr = db_key;
|
|
key.dsize = strlen(db_key);
|
|
tdb_delete(pppdb, key);
|
|
for (i = 0; (p = script_env[i]) != 0; ++i)
|
|
if (p[-1])
|
|
delete_db_key(p);
|
|
}
|
|
#endif /* USE_TDB */
|
|
int ppp_led(char *led_st)
|
|
{
|
|
FILE *ppp_proc;
|
|
|
|
ppp_proc = fopen("/proc/tc3162/led_ppp", "w+");
|
|
|
|
if (!ppp_proc) {
|
|
return -1;
|
|
}
|
|
|
|
fwrite(led_st, 1, strlen(led_st), ppp_proc);
|
|
fclose(ppp_proc);
|
|
|
|
return 0;
|
|
}
|