1744 lines
38 KiB
C
1744 lines
38 KiB
C
/*
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* ntpd.c - main program for the fixed point NTP daemon
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "ntp_machine.h"
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#include "ntpd.h"
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#include "ntp_io.h"
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#include "ntp_stdlib.h"
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#include <ntp_random.h>
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#include "ntp_config.h"
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#include "ntp_syslog.h"
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#include "ntp_assert.h"
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#include "isc/error.h"
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#include "isc/strerror.h"
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#include "isc/formatcheck.h"
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#include "iosignal.h"
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#ifdef SIM
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# include "ntpsim.h"
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#endif
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#include "ntp_libopts.h"
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#include "ntpd-opts.h"
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/* there's a short treatise below what the thread stuff is for.
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* [Bug 2954] enable the threading warm-up only for Linux.
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*/
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#if defined(HAVE_PTHREADS) && HAVE_PTHREADS && !defined(NO_THREADS)
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# ifdef HAVE_PTHREAD_H
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# include <pthread.h>
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# endif
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# if defined(linux)
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# define NEED_PTHREAD_WARMUP
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# endif
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#ifdef HAVE_SYS_SIGNAL_H
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# include <sys/signal.h>
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#else
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# include <signal.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif /* HAVE_SYS_IOCTL_H */
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#if defined(HAVE_RTPRIO)
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# ifdef HAVE_SYS_LOCK_H
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# include <sys/lock.h>
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# endif
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# include <sys/rtprio.h>
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#else
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# ifdef HAVE_PLOCK
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# ifdef HAVE_SYS_LOCK_H
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# include <sys/lock.h>
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# endif
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# endif
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#endif
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#if defined(HAVE_SCHED_SETSCHEDULER)
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# ifdef HAVE_SCHED_H
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# include <sched.h>
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# else
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# ifdef HAVE_SYS_SCHED_H
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# include <sys/sched.h>
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# endif
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# endif
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#endif
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#if defined(HAVE_SYS_MMAN_H)
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# include <sys/mman.h>
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#endif
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#ifdef HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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#ifdef SYS_DOMAINOS
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# include <apollo/base.h>
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#endif /* SYS_DOMAINOS */
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#include "recvbuff.h"
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#include "ntp_cmdargs.h"
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#if 0 /* HMS: I don't think we need this. 961223 */
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#ifdef LOCK_PROCESS
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# ifdef SYS_SOLARIS
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# include <sys/mman.h>
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# else
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# include <sys/lock.h>
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# endif
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#endif
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#endif
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#ifdef SYS_WINNT
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# include "ntservice.h"
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#endif
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#ifdef _AIX
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# include <ulimit.h>
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#endif /* _AIX */
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#ifdef SCO5_CLOCK
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# include <sys/ci/ciioctl.h>
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#endif
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#ifdef HAVE_DROPROOT
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# include <ctype.h>
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# include <grp.h>
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# include <pwd.h>
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#ifdef HAVE_LINUX_CAPABILITIES
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# include <sys/capability.h>
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# include <sys/prctl.h>
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#endif /* HAVE_LINUX_CAPABILITIES */
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#if defined(HAVE_PRIV_H) && defined(HAVE_SOLARIS_PRIVS)
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# include <priv.h>
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#endif /* HAVE_PRIV_H */
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#if defined(HAVE_TRUSTEDBSD_MAC)
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# include <sys/mac.h>
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#endif /* HAVE_TRUSTEDBSD_MAC */
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#endif /* HAVE_DROPROOT */
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#if defined (LIBSECCOMP) && (KERN_SECCOMP)
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/* # include <sys/types.h> */
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# include <sys/resource.h>
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# include <seccomp.h>
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#endif /* LIBSECCOMP and KERN_SECCOMP */
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#ifdef HAVE_DNSREGISTRATION
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# include <dns_sd.h>
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DNSServiceRef mdns;
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#endif
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#ifdef HAVE_SETPGRP_0
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# define ntp_setpgrp(x, y) setpgrp()
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#else
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# define ntp_setpgrp(x, y) setpgrp(x, y)
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#endif
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#ifdef HAVE_SOLARIS_PRIVS
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# define LOWPRIVS "basic,sys_time,net_privaddr,proc_setid,!proc_info,!proc_session,!proc_exec"
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static priv_set_t *lowprivs = NULL;
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static priv_set_t *highprivs = NULL;
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#endif /* HAVE_SOLARIS_PRIVS */
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/*
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* Scheduling priority we run at
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*/
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#define NTPD_PRIO (-12)
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int priority_done = 2; /* 0 - Set priority */
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/* 1 - priority is OK where it is */
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/* 2 - Don't set priority */
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/* 1 and 2 are pretty much the same */
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int listen_to_virtual_ips = TRUE;
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/*
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* No-fork flag. If set, we do not become a background daemon.
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*/
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int nofork; /* Fork by default */
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#ifdef HAVE_DNSREGISTRATION
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/*
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* mDNS registration flag. If set, we attempt to register with the mDNS system, but only
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* after we have synched the first time. If the attempt fails, then try again once per
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* minute for up to 5 times. After all, we may be starting before mDNS.
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*/
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int mdnsreg = FALSE;
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int mdnstries = 5;
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#endif /* HAVE_DNSREGISTRATION */
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#ifdef HAVE_DROPROOT
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int droproot;
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int root_dropped;
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char *user; /* User to switch to */
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char *group; /* group to switch to */
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const char *chrootdir; /* directory to chroot to */
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uid_t sw_uid;
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gid_t sw_gid;
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struct group *gr;
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struct passwd *pw;
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#endif /* HAVE_DROPROOT */
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#ifdef HAVE_WORKING_FORK
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int waitsync_fd_to_close = -1; /* -w/--wait-sync */
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#endif
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/*
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* Version declaration
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*/
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extern const char *Version;
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char const *progname;
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int was_alarmed;
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#ifdef DECL_SYSCALL
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/*
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* We put this here, since the argument profile is syscall-specific
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*/
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extern int syscall (int, ...);
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#endif /* DECL_SYSCALL */
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#if !defined(SIM) && defined(SIGDIE1)
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static volatile int signalled = 0;
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static volatile int signo = 0;
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/* In an ideal world, 'finish_safe()' would declared as noreturn... */
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static void finish_safe (int);
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static RETSIGTYPE finish (int);
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#endif
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#if !defined(SIM) && defined(HAVE_WORKING_FORK)
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static int wait_child_sync_if (int, long);
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#endif
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#if !defined(SIM) && !defined(SYS_WINNT)
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# ifdef DEBUG
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static RETSIGTYPE moredebug (int);
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static RETSIGTYPE lessdebug (int);
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# else /* !DEBUG follows */
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static RETSIGTYPE no_debug (int);
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# endif /* !DEBUG */
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#endif /* !SIM && !SYS_WINNT */
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#ifndef WORK_FORK
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int saved_argc;
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char ** saved_argv;
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#endif
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#ifndef SIM
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int ntpdmain (int, char **);
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static void set_process_priority (void);
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static void assertion_failed (const char *, int,
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isc_assertiontype_t,
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const char *)
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__attribute__ ((__noreturn__));
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static void library_fatal_error (const char *, int,
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const char *, va_list)
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ISC_FORMAT_PRINTF(3, 0);
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static void library_unexpected_error(const char *, int,
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const char *, va_list)
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ISC_FORMAT_PRINTF(3, 0);
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#endif /* !SIM */
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/* Bug2332 unearthed a problem in the interaction of reduced user
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* privileges, the limits on memory usage and some versions of the
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* pthread library on Linux systems. The 'pthread_cancel()' function and
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* likely some others need to track the stack of the thread involved,
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* and uses a function that comes from GCC (--> libgcc_s.so) to do
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* this. Unfortunately the developers of glibc decided to load the
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* library on demand, which speeds up program start but can cause
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* trouble here: Due to all the things NTPD does to limit its resource
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* usage, this deferred load of libgcc_s does not always work once the
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* restrictions are in effect.
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*
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* One way out of this was attempting a forced link against libgcc_s
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* when possible because it makes the library available immediately
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* without deferred load. (The symbol resolution would still be dynamic
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* and on demand, but the code would already be in the process image.)
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*
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* This is a tricky thing to do, since it's not necessary everywhere,
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* not possible everywhere, has shown to break the build of other
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* programs in the NTP suite and is now generally frowned upon.
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*
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* So we take a different approach here: We creat a worker thread that does
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* actually nothing except waiting for cancellation and cancel it. If
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* this is done before all the limitations are put in place, the
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* machinery is pre-heated and all the runtime stuff should be in place
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* and useable when needed.
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*
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* This uses only the standard pthread API and should work with all
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* implementations of pthreads. It is not necessary everywhere, but it's
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* cheap enough to go on nearly unnoticed.
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*
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* Addendum: Bug 2954 showed that the assumption that this should work
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* with all OS is wrong -- at least FreeBSD bombs heavily.
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*/
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#ifdef NEED_PTHREAD_WARMUP
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/* simple thread function: sleep until cancelled, just to exercise
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* thread cancellation.
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*/
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static void*
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my_pthread_warmup_worker(
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void *thread_args)
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{
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(void)thread_args;
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for (;;)
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sleep(10);
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return NULL;
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}
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/* pre-heat threading: create a thread and cancel it, just to exercise
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* thread cancellation.
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*/
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static void
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my_pthread_warmup(void)
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{
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pthread_t thread;
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pthread_attr_t thr_attr;
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int rc;
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pthread_attr_init(&thr_attr);
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#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
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defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE) && \
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defined(PTHREAD_STACK_MIN)
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{
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size_t ssmin = 32*1024; /* 32kB should be minimum */
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if (ssmin < PTHREAD_STACK_MIN)
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ssmin = PTHREAD_STACK_MIN;
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rc = pthread_attr_setstacksize(&thr_attr, ssmin);
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if (0 != rc)
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msyslog(LOG_ERR,
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"my_pthread_warmup: pthread_attr_setstacksize() -> %s",
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strerror(rc));
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}
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#endif
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rc = pthread_create(
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&thread, &thr_attr, my_pthread_warmup_worker, NULL);
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pthread_attr_destroy(&thr_attr);
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if (0 != rc) {
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msyslog(LOG_ERR,
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"my_pthread_warmup: pthread_create() -> %s",
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strerror(rc));
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} else {
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pthread_cancel(thread);
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pthread_join(thread, NULL);
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}
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}
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#endif /*defined(NEED_PTHREAD_WARMUP)*/
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#ifdef NEED_EARLY_FORK
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static void
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dummy_callback(void) { return; }
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static void
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fork_nonchroot_worker(void) {
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getaddrinfo_sometime("localhost", "ntp", NULL, INITIAL_DNS_RETRY,
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(gai_sometime_callback)&dummy_callback, NULL);
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}
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#endif /* NEED_EARLY_FORK */
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void
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parse_cmdline_opts(
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int * pargc,
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char ***pargv
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)
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{
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static int parsed;
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static int optct;
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if (!parsed)
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optct = ntpOptionProcess(&ntpdOptions, *pargc, *pargv);
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parsed = 1;
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*pargc -= optct;
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*pargv += optct;
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}
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#ifdef SIM
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int
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main(
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int argc,
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char *argv[]
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)
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{
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progname = argv[0];
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parse_cmdline_opts(&argc, &argv);
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#ifdef DEBUG
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debug = OPT_VALUE_SET_DEBUG_LEVEL;
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DPRINTF(1, ("%s\n", Version));
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#endif
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return ntpsim(argc, argv);
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}
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#else /* !SIM follows */
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#ifdef NO_MAIN_ALLOWED
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CALL(ntpd,"ntpd",ntpdmain);
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#else /* !NO_MAIN_ALLOWED follows */
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#ifndef SYS_WINNT
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int
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main(
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int argc,
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char *argv[]
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)
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{
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return ntpdmain(argc, argv);
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}
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#endif /* !SYS_WINNT */
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#endif /* !NO_MAIN_ALLOWED */
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#endif /* !SIM */
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#ifdef _AIX
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/*
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* OK. AIX is different than solaris in how it implements plock().
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* If you do NOT adjust the stack limit, you will get the MAXIMUM
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* stack size allocated and PINNED with you program. To check the
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* value, use ulimit -a.
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*
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* To fix this, we create an automatic variable and set our stack limit
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* to that PLUS 32KB of extra space (we need some headroom).
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*
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* This subroutine gets the stack address.
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*
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* Grover Davidson and Matt Ladendorf
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*
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*/
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static char *
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get_aix_stack(void)
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{
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char ch;
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return (&ch);
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}
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/*
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* Signal handler for SIGDANGER.
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*/
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static void
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catch_danger(int signo)
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{
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msyslog(LOG_INFO, "ntpd: setpgid(): %m");
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/* Make the system believe we'll free something, but don't do it! */
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return;
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}
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#endif /* _AIX */
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/*
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* Set the process priority
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*/
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#ifndef SIM
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static void
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set_process_priority(void)
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{
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# ifdef DEBUG
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if (debug > 1)
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msyslog(LOG_DEBUG, "set_process_priority: %s: priority_done is <%d>",
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((priority_done)
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? "Leave priority alone"
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: "Attempt to set priority"
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),
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priority_done);
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# endif /* DEBUG */
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# if defined(HAVE_SCHED_SETSCHEDULER)
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if (!priority_done) {
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extern int config_priority_override, config_priority;
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int pmax, pmin;
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struct sched_param sched;
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pmax = sched_get_priority_max(SCHED_FIFO);
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sched.sched_priority = pmax;
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if ( config_priority_override ) {
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pmin = sched_get_priority_min(SCHED_FIFO);
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if ( config_priority > pmax )
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sched.sched_priority = pmax;
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else if ( config_priority < pmin )
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sched.sched_priority = pmin;
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else
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sched.sched_priority = config_priority;
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}
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if ( sched_setscheduler(0, SCHED_FIFO, &sched) == -1 )
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msyslog(LOG_ERR, "sched_setscheduler(): %m");
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else
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++priority_done;
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}
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# endif /* HAVE_SCHED_SETSCHEDULER */
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# ifdef HAVE_RTPRIO
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# ifdef RTP_SET
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if (!priority_done) {
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struct rtprio srtp;
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srtp.type = RTP_PRIO_REALTIME; /* was: RTP_PRIO_NORMAL */
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srtp.prio = 0; /* 0 (hi) -> RTP_PRIO_MAX (31,lo) */
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if (rtprio(RTP_SET, getpid(), &srtp) < 0)
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msyslog(LOG_ERR, "rtprio() error: %m");
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else
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++priority_done;
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}
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# else /* !RTP_SET follows */
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if (!priority_done) {
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if (rtprio(0, 120) < 0)
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msyslog(LOG_ERR, "rtprio() error: %m");
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else
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++priority_done;
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}
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# endif /* !RTP_SET */
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# endif /* HAVE_RTPRIO */
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# if defined(NTPD_PRIO) && NTPD_PRIO != 0
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# ifdef HAVE_ATT_NICE
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if (!priority_done) {
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errno = 0;
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if (-1 == nice (NTPD_PRIO) && errno != 0)
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msyslog(LOG_ERR, "nice() error: %m");
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else
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++priority_done;
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}
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# endif /* HAVE_ATT_NICE */
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# ifdef HAVE_BSD_NICE
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if (!priority_done) {
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if (-1 == setpriority(PRIO_PROCESS, 0, NTPD_PRIO))
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msyslog(LOG_ERR, "setpriority() error: %m");
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else
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++priority_done;
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}
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# endif /* HAVE_BSD_NICE */
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# endif /* NTPD_PRIO && NTPD_PRIO != 0 */
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if (!priority_done)
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msyslog(LOG_ERR, "set_process_priority: No way found to improve our priority");
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}
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#endif /* !SIM */
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|
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#if !defined(SIM) && !defined(SYS_WINNT)
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|
/*
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* Detach from terminal (much like daemon())
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|
* Nothe that this function calls exit()
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*/
|
|
static void
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detach_from_terminal(
|
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int pipe_fds[2],
|
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long wait_sync,
|
|
const char *logfilename
|
|
)
|
|
{
|
|
int rc;
|
|
int exit_code;
|
|
# if !defined(HAVE_SETSID) && !defined (HAVE_SETPGID) && defined(TIOCNOTTY)
|
|
int fid;
|
|
# endif
|
|
# ifdef _AIX
|
|
struct sigaction sa;
|
|
# endif
|
|
|
|
rc = fork();
|
|
if (-1 == rc) {
|
|
exit_code = (errno) ? errno : -1;
|
|
msyslog(LOG_ERR, "fork: %m");
|
|
exit(exit_code);
|
|
}
|
|
if (rc > 0) {
|
|
/* parent */
|
|
exit_code = wait_child_sync_if(pipe_fds[0],
|
|
wait_sync);
|
|
exit(exit_code);
|
|
}
|
|
|
|
/*
|
|
* child/daemon
|
|
* close all open files excepting waitsync_fd_to_close.
|
|
* msyslog() unreliable until after init_logging().
|
|
*/
|
|
closelog();
|
|
if (syslog_file != NULL) {
|
|
fclose(syslog_file);
|
|
syslog_file = NULL;
|
|
syslogit = TRUE;
|
|
}
|
|
close_all_except(waitsync_fd_to_close);
|
|
INSIST(0 == open("/dev/null", 0) && 1 == dup2(0, 1) \
|
|
&& 2 == dup2(0, 2));
|
|
|
|
init_logging(progname, 0, TRUE);
|
|
/* we lost our logfile (if any) daemonizing */
|
|
setup_logfile(logfilename);
|
|
|
|
# ifdef SYS_DOMAINOS
|
|
{
|
|
uid_$t puid;
|
|
status_$t st;
|
|
|
|
proc2_$who_am_i(&puid);
|
|
proc2_$make_server(&puid, &st);
|
|
}
|
|
# endif /* SYS_DOMAINOS */
|
|
# ifdef HAVE_SETSID
|
|
if (setsid() == (pid_t)-1)
|
|
msyslog(LOG_ERR, "setsid(): %m");
|
|
# elif defined(HAVE_SETPGID)
|
|
if (setpgid(0, 0) == -1)
|
|
msyslog(LOG_ERR, "setpgid(): %m");
|
|
# else /* !HAVE_SETSID && !HAVE_SETPGID follows */
|
|
# ifdef TIOCNOTTY
|
|
fid = open("/dev/tty", 2);
|
|
if (fid >= 0) {
|
|
ioctl(fid, (u_long)TIOCNOTTY, NULL);
|
|
close(fid);
|
|
}
|
|
# endif /* TIOCNOTTY */
|
|
ntp_setpgrp(0, getpid());
|
|
# endif /* !HAVE_SETSID && !HAVE_SETPGID */
|
|
# ifdef _AIX
|
|
/* Don't get killed by low-on-memory signal. */
|
|
sa.sa_handler = catch_danger;
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_flags = SA_RESTART;
|
|
sigaction(SIGDANGER, &sa, NULL);
|
|
# endif /* _AIX */
|
|
|
|
return;
|
|
}
|
|
|
|
#ifdef HAVE_DROPROOT
|
|
/*
|
|
* Map user name/number to user ID
|
|
*/
|
|
static int
|
|
map_user(
|
|
)
|
|
{
|
|
char *endp;
|
|
|
|
if (isdigit((unsigned char)*user)) {
|
|
sw_uid = (uid_t)strtoul(user, &endp, 0);
|
|
if (*endp != '\0')
|
|
goto getuser;
|
|
|
|
if ((pw = getpwuid(sw_uid)) != NULL) {
|
|
free(user);
|
|
user = estrdup(pw->pw_name);
|
|
sw_gid = pw->pw_gid;
|
|
} else {
|
|
errno = 0;
|
|
msyslog(LOG_ERR, "Cannot find user ID %s", user);
|
|
return 0;
|
|
}
|
|
|
|
} else {
|
|
getuser:
|
|
errno = 0;
|
|
if ((pw = getpwnam(user)) != NULL) {
|
|
sw_uid = pw->pw_uid;
|
|
sw_gid = pw->pw_gid;
|
|
} else {
|
|
if (errno)
|
|
msyslog(LOG_ERR, "getpwnam(%s) failed: %m", user);
|
|
else
|
|
msyslog(LOG_ERR, "Cannot find user `%s'", user);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Map group name/number to group ID
|
|
*/
|
|
static int
|
|
map_group(
|
|
)
|
|
{
|
|
char *endp;
|
|
|
|
if (isdigit((unsigned char)*group)) {
|
|
sw_gid = (gid_t)strtoul(group, &endp, 0);
|
|
if (*endp != '\0')
|
|
goto getgroup;
|
|
} else {
|
|
getgroup:
|
|
if ((gr = getgrnam(group)) != NULL) {
|
|
sw_gid = gr->gr_gid;
|
|
} else {
|
|
errno = 0;
|
|
msyslog(LOG_ERR, "Cannot find group `%s'", group);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Change (effective) user and group IDs, also initialize the supplementary group access list
|
|
*/
|
|
int
|
|
set_user_group_ids(
|
|
)
|
|
{
|
|
/* If the the user was already mapped, no need to map it again */
|
|
if ((NULL != user) && (0 == sw_uid)) {
|
|
if (0 == map_user())
|
|
exit (-1);
|
|
}
|
|
/* same applies for the group */
|
|
if ((NULL != group) && (0 == sw_gid)) {
|
|
if (0 == map_group())
|
|
exit (-1);
|
|
}
|
|
|
|
if (user && initgroups(user, sw_gid)) {
|
|
msyslog(LOG_ERR, "Cannot initgroups() to user `%s': %m", user);
|
|
return 0;
|
|
}
|
|
if (group && setgid(sw_gid)) {
|
|
msyslog(LOG_ERR, "Cannot setgid() to group `%s': %m", group);
|
|
return 0;
|
|
}
|
|
if (group && setegid(sw_gid)) {
|
|
msyslog(LOG_ERR, "Cannot setegid() to group `%s': %m", group);
|
|
return 0;
|
|
}
|
|
if (group) {
|
|
if (0 != setgroups(1, &sw_gid)) {
|
|
msyslog(LOG_ERR, "setgroups(1, %d) failed: %m", sw_gid);
|
|
return 0;
|
|
}
|
|
}
|
|
else if (pw)
|
|
if (0 != initgroups(pw->pw_name, pw->pw_gid)) {
|
|
msyslog(LOG_ERR, "initgroups(<%s>, %d) filed: %m", pw->pw_name, pw->pw_gid);
|
|
return 0;
|
|
}
|
|
if (user && setuid(sw_uid)) {
|
|
msyslog(LOG_ERR, "Cannot setuid() to user `%s': %m", user);
|
|
return 0;
|
|
}
|
|
if (user && seteuid(sw_uid)) {
|
|
msyslog(LOG_ERR, "Cannot seteuid() to user `%s': %m", user);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
#endif /* HAVE_DROPROOT */
|
|
#endif /* !SIM */
|
|
|
|
/*
|
|
* Main program. Initialize us, disconnect us from the tty if necessary,
|
|
* and loop waiting for I/O and/or timer expiries.
|
|
*/
|
|
#ifndef SIM
|
|
int
|
|
ntpdmain(
|
|
int argc,
|
|
char *argv[]
|
|
)
|
|
{
|
|
l_fp now;
|
|
struct recvbuf *rbuf;
|
|
const char * logfilename;
|
|
# ifdef HAVE_UMASK
|
|
mode_t uv;
|
|
# endif
|
|
# if defined(HAVE_GETUID) && !defined(MPE) /* MPE lacks the concept of root */
|
|
uid_t uid;
|
|
# endif
|
|
# if defined(HAVE_WORKING_FORK)
|
|
long wait_sync = 0;
|
|
int pipe_fds[2];
|
|
int rc;
|
|
int exit_code;
|
|
# endif /* HAVE_WORKING_FORK*/
|
|
# ifdef SCO5_CLOCK
|
|
int fd;
|
|
int zero;
|
|
# endif
|
|
|
|
# ifdef NEED_PTHREAD_WARMUP
|
|
my_pthread_warmup();
|
|
# endif
|
|
|
|
# ifdef HAVE_UMASK
|
|
uv = umask(0);
|
|
if (uv)
|
|
umask(uv);
|
|
else
|
|
umask(022);
|
|
# endif
|
|
saved_argc = argc;
|
|
saved_argv = argv;
|
|
progname = argv[0];
|
|
initializing = TRUE; /* mark that we are initializing */
|
|
parse_cmdline_opts(&argc, &argv);
|
|
# ifdef DEBUG
|
|
debug = OPT_VALUE_SET_DEBUG_LEVEL;
|
|
# ifdef HAVE_SETLINEBUF
|
|
setlinebuf(stdout);
|
|
# endif
|
|
# endif
|
|
|
|
if (HAVE_OPT(NOFORK) || HAVE_OPT(QUIT)
|
|
# ifdef DEBUG
|
|
|| debug
|
|
# endif
|
|
|| HAVE_OPT(SAVECONFIGQUIT))
|
|
nofork = TRUE;
|
|
|
|
init_logging(progname, NLOG_SYNCMASK, TRUE);
|
|
/* honor -l/--logfile option to log to a file */
|
|
if (HAVE_OPT(LOGFILE)) {
|
|
logfilename = OPT_ARG(LOGFILE);
|
|
syslogit = FALSE;
|
|
change_logfile(logfilename, FALSE);
|
|
} else {
|
|
logfilename = NULL;
|
|
if (nofork)
|
|
msyslog_term = TRUE;
|
|
if (HAVE_OPT(SAVECONFIGQUIT))
|
|
syslogit = FALSE;
|
|
}
|
|
msyslog(LOG_NOTICE, "%s: Starting", Version);
|
|
|
|
{
|
|
int i;
|
|
char buf[1024]; /* Secret knowledge of msyslog buf length */
|
|
char *cp = buf;
|
|
|
|
/* Note that every arg has an initial space character */
|
|
snprintf(cp, sizeof(buf), "Command line:");
|
|
cp += strlen(cp);
|
|
|
|
for (i = 0; i < saved_argc ; ++i) {
|
|
snprintf(cp, sizeof(buf) - (cp - buf),
|
|
" %s", saved_argv[i]);
|
|
cp += strlen(cp);
|
|
}
|
|
msyslog(LOG_INFO, "%s", buf);
|
|
}
|
|
|
|
/*
|
|
* Install trap handlers to log errors and assertion failures.
|
|
* Default handlers print to stderr which doesn't work if detached.
|
|
*/
|
|
isc_assertion_setcallback(assertion_failed);
|
|
isc_error_setfatal(library_fatal_error);
|
|
isc_error_setunexpected(library_unexpected_error);
|
|
|
|
/* MPE lacks the concept of root */
|
|
# if defined(HAVE_GETUID) && !defined(MPE)
|
|
uid = getuid();
|
|
if (uid && !HAVE_OPT( SAVECONFIGQUIT )
|
|
# if defined(HAVE_TRUSTEDBSD_MAC)
|
|
/* We can run as non-root if the mac_ntpd policy is enabled. */
|
|
&& mac_is_present("ntpd") != 1
|
|
# endif
|
|
) {
|
|
msyslog_term = TRUE;
|
|
msyslog(LOG_ERR,
|
|
"must be run as root, not uid %ld", (long)uid);
|
|
exit(1);
|
|
}
|
|
# endif
|
|
|
|
/*
|
|
* Enable the Multi-Media Timer for Windows?
|
|
*/
|
|
# ifdef SYS_WINNT
|
|
if (HAVE_OPT( MODIFYMMTIMER ))
|
|
set_mm_timer(MM_TIMER_HIRES);
|
|
# endif
|
|
|
|
#ifdef HAVE_DNSREGISTRATION
|
|
/*
|
|
* Enable mDNS registrations?
|
|
*/
|
|
if (HAVE_OPT( MDNS )) {
|
|
mdnsreg = TRUE;
|
|
}
|
|
#endif /* HAVE_DNSREGISTRATION */
|
|
|
|
if (HAVE_OPT( NOVIRTUALIPS ))
|
|
listen_to_virtual_ips = 0;
|
|
|
|
/*
|
|
* --interface, listen on specified interfaces
|
|
*/
|
|
if (HAVE_OPT( INTERFACE )) {
|
|
int ifacect = STACKCT_OPT( INTERFACE );
|
|
const char** ifaces = STACKLST_OPT( INTERFACE );
|
|
sockaddr_u addr;
|
|
|
|
while (ifacect-- > 0) {
|
|
add_nic_rule(
|
|
is_ip_address(*ifaces, AF_UNSPEC, &addr)
|
|
? MATCH_IFADDR
|
|
: MATCH_IFNAME,
|
|
*ifaces, -1, ACTION_LISTEN);
|
|
ifaces++;
|
|
}
|
|
}
|
|
|
|
if (HAVE_OPT( NICE ))
|
|
priority_done = 0;
|
|
|
|
# ifdef HAVE_SCHED_SETSCHEDULER
|
|
if (HAVE_OPT( PRIORITY )) {
|
|
config_priority = OPT_VALUE_PRIORITY;
|
|
config_priority_override = 1;
|
|
priority_done = 0;
|
|
}
|
|
# endif
|
|
|
|
# ifdef HAVE_WORKING_FORK
|
|
/* make sure the FDs are initialised */
|
|
pipe_fds[0] = -1;
|
|
pipe_fds[1] = -1;
|
|
do { /* 'loop' once */
|
|
if (!HAVE_OPT( WAIT_SYNC ))
|
|
break;
|
|
wait_sync = OPT_VALUE_WAIT_SYNC;
|
|
if (wait_sync <= 0) {
|
|
wait_sync = 0;
|
|
break;
|
|
}
|
|
/* -w requires a fork() even with debug > 0 */
|
|
nofork = FALSE;
|
|
if (pipe(pipe_fds)) {
|
|
exit_code = (errno) ? errno : -1;
|
|
msyslog(LOG_ERR,
|
|
"Pipe creation failed for --wait-sync: %m");
|
|
exit(exit_code);
|
|
}
|
|
waitsync_fd_to_close = pipe_fds[1];
|
|
} while (0); /* 'loop' once */
|
|
# endif /* HAVE_WORKING_FORK */
|
|
|
|
init_lib();
|
|
# ifdef SYS_WINNT
|
|
/*
|
|
* Make sure the service is initialized before we do anything else
|
|
*/
|
|
ntservice_init();
|
|
|
|
/*
|
|
* Start interpolation thread, must occur before first
|
|
* get_systime()
|
|
*/
|
|
init_winnt_time();
|
|
# endif
|
|
/*
|
|
* Initialize random generator and public key pair
|
|
*/
|
|
get_systime(&now);
|
|
|
|
ntp_srandom((int)(now.l_i * now.l_uf));
|
|
|
|
/*
|
|
* Detach us from the terminal. May need an #ifndef GIZMO.
|
|
*/
|
|
if (!nofork) {
|
|
|
|
# ifdef HAVE_WORKING_FORK
|
|
detach_from_terminal(pipe_fds, wait_sync, logfilename);
|
|
# endif /* HAVE_WORKING_FORK */
|
|
}
|
|
|
|
# ifdef SCO5_CLOCK
|
|
/*
|
|
* SCO OpenServer's system clock offers much more precise timekeeping
|
|
* on the base CPU than the other CPUs (for multiprocessor systems),
|
|
* so we must lock to the base CPU.
|
|
*/
|
|
fd = open("/dev/at1", O_RDONLY);
|
|
if (fd >= 0) {
|
|
zero = 0;
|
|
if (ioctl(fd, ACPU_LOCK, &zero) < 0)
|
|
msyslog(LOG_ERR, "cannot lock to base CPU: %m");
|
|
close(fd);
|
|
}
|
|
# endif
|
|
|
|
/* Setup stack size in preparation for locking pages in memory. */
|
|
# if defined(HAVE_MLOCKALL)
|
|
# ifdef HAVE_SETRLIMIT
|
|
ntp_rlimit(RLIMIT_STACK, DFLT_RLIMIT_STACK * 4096, 4096, "4k");
|
|
# ifdef RLIMIT_MEMLOCK
|
|
/*
|
|
* The default RLIMIT_MEMLOCK is very low on Linux systems.
|
|
* Unless we increase this limit malloc calls are likely to
|
|
* fail if we drop root privilege. To be useful the value
|
|
* has to be larger than the largest ntpd resident set size.
|
|
*/
|
|
ntp_rlimit(RLIMIT_MEMLOCK, DFLT_RLIMIT_MEMLOCK * 1024 * 1024, 1024 * 1024, "MB");
|
|
# endif /* RLIMIT_MEMLOCK */
|
|
# endif /* HAVE_SETRLIMIT */
|
|
# else /* !HAVE_MLOCKALL follows */
|
|
# ifdef HAVE_PLOCK
|
|
# ifdef PROCLOCK
|
|
# ifdef _AIX
|
|
/*
|
|
* set the stack limit for AIX for plock().
|
|
* see get_aix_stack() for more info.
|
|
*/
|
|
if (ulimit(SET_STACKLIM, (get_aix_stack() - 8 * 4096)) < 0)
|
|
msyslog(LOG_ERR,
|
|
"Cannot adjust stack limit for plock: %m");
|
|
# endif /* _AIX */
|
|
# endif /* PROCLOCK */
|
|
# endif /* HAVE_PLOCK */
|
|
# endif /* !HAVE_MLOCKALL */
|
|
|
|
/*
|
|
* Set up signals we pay attention to locally.
|
|
*/
|
|
# ifdef SIGDIE1
|
|
signal_no_reset(SIGDIE1, finish);
|
|
signal_no_reset(SIGDIE2, finish);
|
|
signal_no_reset(SIGDIE3, finish);
|
|
signal_no_reset(SIGDIE4, finish);
|
|
# endif
|
|
# ifdef SIGBUS
|
|
signal_no_reset(SIGBUS, finish);
|
|
# endif
|
|
|
|
# if !defined(SYS_WINNT) && !defined(VMS)
|
|
# ifdef DEBUG
|
|
(void) signal_no_reset(MOREDEBUGSIG, moredebug);
|
|
(void) signal_no_reset(LESSDEBUGSIG, lessdebug);
|
|
# else
|
|
(void) signal_no_reset(MOREDEBUGSIG, no_debug);
|
|
(void) signal_no_reset(LESSDEBUGSIG, no_debug);
|
|
# endif /* DEBUG */
|
|
# endif /* !SYS_WINNT && !VMS */
|
|
|
|
/*
|
|
* Set up signals we should never pay attention to.
|
|
*/
|
|
# ifdef SIGPIPE
|
|
signal_no_reset(SIGPIPE, SIG_IGN);
|
|
# endif
|
|
|
|
/*
|
|
* Call the init_ routines to initialize the data structures.
|
|
*
|
|
* Exactly what command-line options are we expecting here?
|
|
*/
|
|
INIT_SSL();
|
|
init_auth();
|
|
init_util();
|
|
init_restrict();
|
|
init_mon();
|
|
init_timer();
|
|
init_request();
|
|
init_control();
|
|
init_peer();
|
|
# ifdef REFCLOCK
|
|
init_refclock();
|
|
# endif
|
|
set_process_priority();
|
|
init_proto(); /* Call at high priority */
|
|
init_io();
|
|
init_loopfilter();
|
|
mon_start(MON_ON); /* monitor on by default now */
|
|
/* turn off in config if unwanted */
|
|
|
|
/*
|
|
* Get the configuration. This is done in a separate module
|
|
* since this will definitely be different for the gizmo board.
|
|
*/
|
|
getconfig(argc, argv);
|
|
|
|
if (-1 == cur_memlock) {
|
|
# if defined(HAVE_MLOCKALL)
|
|
/*
|
|
* lock the process into memory
|
|
*/
|
|
if ( !HAVE_OPT(SAVECONFIGQUIT)
|
|
# ifdef RLIMIT_MEMLOCK
|
|
&& -1 != DFLT_RLIMIT_MEMLOCK
|
|
# endif
|
|
&& 0 != mlockall(MCL_CURRENT|MCL_FUTURE))
|
|
msyslog(LOG_ERR, "mlockall(): %m");
|
|
# else /* !HAVE_MLOCKALL follows */
|
|
# ifdef HAVE_PLOCK
|
|
# ifdef PROCLOCK
|
|
/*
|
|
* lock the process into memory
|
|
*/
|
|
if (!HAVE_OPT(SAVECONFIGQUIT) && 0 != plock(PROCLOCK))
|
|
msyslog(LOG_ERR, "plock(PROCLOCK): %m");
|
|
# else /* !PROCLOCK follows */
|
|
# ifdef TXTLOCK
|
|
/*
|
|
* Lock text into ram
|
|
*/
|
|
if (!HAVE_OPT(SAVECONFIGQUIT) && 0 != plock(TXTLOCK))
|
|
msyslog(LOG_ERR, "plock(TXTLOCK) error: %m");
|
|
# else /* !TXTLOCK follows */
|
|
msyslog(LOG_ERR, "plock() - don't know what to lock!");
|
|
# endif /* !TXTLOCK */
|
|
# endif /* !PROCLOCK */
|
|
# endif /* HAVE_PLOCK */
|
|
# endif /* !HAVE_MLOCKALL */
|
|
}
|
|
|
|
loop_config(LOOP_DRIFTINIT, 0);
|
|
report_event(EVNT_SYSRESTART, NULL, NULL);
|
|
initializing = FALSE;
|
|
|
|
# ifdef HAVE_DROPROOT
|
|
if (droproot) {
|
|
|
|
#ifdef NEED_EARLY_FORK
|
|
fork_nonchroot_worker();
|
|
#endif
|
|
|
|
/* Drop super-user privileges and chroot now if the OS supports this */
|
|
|
|
# ifdef HAVE_LINUX_CAPABILITIES
|
|
/* set flag: keep privileges accross setuid() call (we only really need cap_sys_time): */
|
|
if (prctl( PR_SET_KEEPCAPS, 1L, 0L, 0L, 0L ) == -1) {
|
|
msyslog( LOG_ERR, "prctl( PR_SET_KEEPCAPS, 1L ) failed: %m" );
|
|
exit(-1);
|
|
}
|
|
# elif HAVE_SOLARIS_PRIVS
|
|
/* Nothing to do here */
|
|
# else
|
|
/* we need a user to switch to */
|
|
if (user == NULL) {
|
|
msyslog(LOG_ERR, "Need user name to drop root privileges (see -u flag!)" );
|
|
exit(-1);
|
|
}
|
|
# endif /* HAVE_LINUX_CAPABILITIES || HAVE_SOLARIS_PRIVS */
|
|
|
|
if (user != NULL) {
|
|
if (0 == map_user())
|
|
exit (-1);
|
|
}
|
|
if (group != NULL) {
|
|
if (0 == map_group())
|
|
exit (-1);
|
|
}
|
|
|
|
if (chrootdir ) {
|
|
/* make sure cwd is inside the jail: */
|
|
if (chdir(chrootdir)) {
|
|
msyslog(LOG_ERR, "Cannot chdir() to `%s': %m", chrootdir);
|
|
exit (-1);
|
|
}
|
|
if (chroot(chrootdir)) {
|
|
msyslog(LOG_ERR, "Cannot chroot() to `%s': %m", chrootdir);
|
|
exit (-1);
|
|
}
|
|
if (chdir("/")) {
|
|
msyslog(LOG_ERR, "Cannot chdir() to`root after chroot(): %m");
|
|
exit (-1);
|
|
}
|
|
}
|
|
# ifdef HAVE_SOLARIS_PRIVS
|
|
if ((lowprivs = priv_str_to_set(LOWPRIVS, ",", NULL)) == NULL) {
|
|
msyslog(LOG_ERR, "priv_str_to_set() failed:%m");
|
|
exit(-1);
|
|
}
|
|
if ((highprivs = priv_allocset()) == NULL) {
|
|
msyslog(LOG_ERR, "priv_allocset() failed:%m");
|
|
exit(-1);
|
|
}
|
|
(void) getppriv(PRIV_PERMITTED, highprivs);
|
|
(void) priv_intersect(highprivs, lowprivs);
|
|
if (setppriv(PRIV_SET, PRIV_PERMITTED, lowprivs) == -1) {
|
|
msyslog(LOG_ERR, "setppriv() failed:%m");
|
|
exit(-1);
|
|
}
|
|
# endif /* HAVE_SOLARIS_PRIVS */
|
|
if (0 == set_user_group_ids())
|
|
exit(-1);
|
|
|
|
# if defined(HAVE_TRUSTEDBSD_MAC)
|
|
/*
|
|
* To manipulate system time and (re-)bind to NTP_PORT as needed
|
|
* following interface changes, we must either run as uid 0 or
|
|
* the mac_ntpd policy module must be enabled.
|
|
*/
|
|
if (sw_uid != 0 && mac_is_present("ntpd") != 1) {
|
|
msyslog(LOG_ERR, "Need MAC 'ntpd' policy enabled to drop root privileges");
|
|
exit (-1);
|
|
}
|
|
# elif !defined(HAVE_LINUX_CAPABILITIES) && !defined(HAVE_SOLARIS_PRIVS)
|
|
/*
|
|
* for now assume that the privilege to bind to privileged ports
|
|
* is associated with running with uid 0 - should be refined on
|
|
* ports that allow binding to NTP_PORT with uid != 0
|
|
*/
|
|
disable_dynamic_updates |= (sw_uid != 0); /* also notifies routing message listener */
|
|
# endif /* !HAVE_LINUX_CAPABILITIES && !HAVE_SOLARIS_PRIVS */
|
|
|
|
if (disable_dynamic_updates && interface_interval) {
|
|
interface_interval = 0;
|
|
msyslog(LOG_INFO, "running as non-root disables dynamic interface tracking");
|
|
}
|
|
|
|
# ifdef HAVE_LINUX_CAPABILITIES
|
|
{
|
|
/*
|
|
* We may be running under non-root uid now, but we still hold full root privileges!
|
|
* We drop all of them, except for the crucial one or two: cap_sys_time and
|
|
* cap_net_bind_service if doing dynamic interface tracking.
|
|
*/
|
|
cap_t caps;
|
|
char *captext;
|
|
|
|
captext = (0 != interface_interval)
|
|
? "cap_sys_time,cap_net_bind_service=pe"
|
|
: "cap_sys_time=pe";
|
|
caps = cap_from_text(captext);
|
|
if (!caps) {
|
|
msyslog(LOG_ERR,
|
|
"cap_from_text(%s) failed: %m",
|
|
captext);
|
|
exit(-1);
|
|
}
|
|
if (-1 == cap_set_proc(caps)) {
|
|
msyslog(LOG_ERR,
|
|
"cap_set_proc() failed to drop root privs: %m");
|
|
exit(-1);
|
|
}
|
|
cap_free(caps);
|
|
}
|
|
# endif /* HAVE_LINUX_CAPABILITIES */
|
|
# ifdef HAVE_SOLARIS_PRIVS
|
|
if (priv_delset(lowprivs, "proc_setid") == -1) {
|
|
msyslog(LOG_ERR, "priv_delset() failed:%m");
|
|
exit(-1);
|
|
}
|
|
if (setppriv(PRIV_SET, PRIV_PERMITTED, lowprivs) == -1) {
|
|
msyslog(LOG_ERR, "setppriv() failed:%m");
|
|
exit(-1);
|
|
}
|
|
priv_freeset(lowprivs);
|
|
priv_freeset(highprivs);
|
|
# endif /* HAVE_SOLARIS_PRIVS */
|
|
root_dropped = TRUE;
|
|
fork_deferred_worker();
|
|
} /* if (droproot) */
|
|
# endif /* HAVE_DROPROOT */
|
|
|
|
/* libssecomp sandboxing */
|
|
#if defined (LIBSECCOMP) && (KERN_SECCOMP)
|
|
scmp_filter_ctx ctx;
|
|
|
|
if ((ctx = seccomp_init(SCMP_ACT_KILL)) < 0)
|
|
msyslog(LOG_ERR, "%s: seccomp_init(SCMP_ACT_KILL) failed: %m", __func__);
|
|
else {
|
|
msyslog(LOG_DEBUG, "%s: seccomp_init(SCMP_ACT_KILL) succeeded", __func__);
|
|
}
|
|
|
|
#ifdef __x86_64__
|
|
int scmp_sc[] = {
|
|
SCMP_SYS(adjtimex),
|
|
SCMP_SYS(bind),
|
|
SCMP_SYS(brk),
|
|
SCMP_SYS(chdir),
|
|
SCMP_SYS(clock_gettime),
|
|
SCMP_SYS(clock_settime),
|
|
SCMP_SYS(close),
|
|
SCMP_SYS(connect),
|
|
SCMP_SYS(exit_group),
|
|
SCMP_SYS(fstat),
|
|
SCMP_SYS(fsync),
|
|
SCMP_SYS(futex),
|
|
SCMP_SYS(getitimer),
|
|
SCMP_SYS(getsockname),
|
|
SCMP_SYS(ioctl),
|
|
SCMP_SYS(lseek),
|
|
SCMP_SYS(madvise),
|
|
SCMP_SYS(mmap),
|
|
SCMP_SYS(munmap),
|
|
SCMP_SYS(open),
|
|
SCMP_SYS(poll),
|
|
SCMP_SYS(read),
|
|
SCMP_SYS(recvmsg),
|
|
SCMP_SYS(rename),
|
|
SCMP_SYS(rt_sigaction),
|
|
SCMP_SYS(rt_sigprocmask),
|
|
SCMP_SYS(rt_sigreturn),
|
|
SCMP_SYS(select),
|
|
SCMP_SYS(sendto),
|
|
SCMP_SYS(setitimer),
|
|
SCMP_SYS(setsid),
|
|
SCMP_SYS(socket),
|
|
SCMP_SYS(stat),
|
|
SCMP_SYS(time),
|
|
SCMP_SYS(write),
|
|
};
|
|
#endif
|
|
#ifdef __i386__
|
|
int scmp_sc[] = {
|
|
SCMP_SYS(_newselect),
|
|
SCMP_SYS(adjtimex),
|
|
SCMP_SYS(brk),
|
|
SCMP_SYS(chdir),
|
|
SCMP_SYS(clock_gettime),
|
|
SCMP_SYS(clock_settime),
|
|
SCMP_SYS(close),
|
|
SCMP_SYS(exit_group),
|
|
SCMP_SYS(fsync),
|
|
SCMP_SYS(futex),
|
|
SCMP_SYS(getitimer),
|
|
SCMP_SYS(madvise),
|
|
SCMP_SYS(mmap),
|
|
SCMP_SYS(mmap2),
|
|
SCMP_SYS(munmap),
|
|
SCMP_SYS(open),
|
|
SCMP_SYS(poll),
|
|
SCMP_SYS(read),
|
|
SCMP_SYS(rename),
|
|
SCMP_SYS(rt_sigaction),
|
|
SCMP_SYS(rt_sigprocmask),
|
|
SCMP_SYS(select),
|
|
SCMP_SYS(setitimer),
|
|
SCMP_SYS(setsid),
|
|
SCMP_SYS(sigprocmask),
|
|
SCMP_SYS(sigreturn),
|
|
SCMP_SYS(socketcall),
|
|
SCMP_SYS(stat64),
|
|
SCMP_SYS(time),
|
|
SCMP_SYS(write),
|
|
};
|
|
#endif
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < COUNTOF(scmp_sc); i++) {
|
|
if (seccomp_rule_add(ctx,
|
|
SCMP_ACT_ALLOW, scmp_sc[i], 0) < 0) {
|
|
msyslog(LOG_ERR,
|
|
"%s: seccomp_rule_add() failed: %m",
|
|
__func__);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (seccomp_load(ctx) < 0)
|
|
msyslog(LOG_ERR, "%s: seccomp_load() failed: %m",
|
|
__func__);
|
|
else {
|
|
msyslog(LOG_DEBUG, "%s: seccomp_load() succeeded", __func__);
|
|
}
|
|
#endif /* LIBSECCOMP and KERN_SECCOMP */
|
|
|
|
#ifdef SYS_WINNT
|
|
ntservice_isup();
|
|
#endif
|
|
|
|
# ifdef HAVE_IO_COMPLETION_PORT
|
|
|
|
for (;;) {
|
|
#if !defined(SIM) && defined(SIGDIE1)
|
|
if (signalled)
|
|
finish_safe(signo);
|
|
#endif
|
|
GetReceivedBuffers();
|
|
# else /* normal I/O */
|
|
|
|
BLOCK_IO_AND_ALARM();
|
|
was_alarmed = FALSE;
|
|
|
|
for (;;) {
|
|
#if !defined(SIM) && defined(SIGDIE1)
|
|
if (signalled)
|
|
finish_safe(signo);
|
|
#endif
|
|
if (alarm_flag) { /* alarmed? */
|
|
was_alarmed = TRUE;
|
|
alarm_flag = FALSE;
|
|
}
|
|
|
|
/* collect async name/addr results */
|
|
if (!was_alarmed)
|
|
harvest_blocking_responses();
|
|
|
|
if (!was_alarmed && !has_full_recv_buffer()) {
|
|
/*
|
|
* Nothing to do. Wait for something.
|
|
*/
|
|
io_handler();
|
|
}
|
|
|
|
if (alarm_flag) { /* alarmed? */
|
|
was_alarmed = TRUE;
|
|
alarm_flag = FALSE;
|
|
}
|
|
|
|
if (was_alarmed) {
|
|
UNBLOCK_IO_AND_ALARM();
|
|
/*
|
|
* Out here, signals are unblocked. Call timer routine
|
|
* to process expiry.
|
|
*/
|
|
timer();
|
|
was_alarmed = FALSE;
|
|
BLOCK_IO_AND_ALARM();
|
|
}
|
|
|
|
# endif /* !HAVE_IO_COMPLETION_PORT */
|
|
|
|
# ifdef DEBUG_TIMING
|
|
{
|
|
l_fp pts;
|
|
l_fp tsa, tsb;
|
|
int bufcount = 0;
|
|
|
|
get_systime(&pts);
|
|
tsa = pts;
|
|
# endif
|
|
rbuf = get_full_recv_buffer();
|
|
while (rbuf != NULL) {
|
|
if (alarm_flag) {
|
|
was_alarmed = TRUE;
|
|
alarm_flag = FALSE;
|
|
}
|
|
UNBLOCK_IO_AND_ALARM();
|
|
|
|
if (was_alarmed) {
|
|
/* avoid timer starvation during lengthy I/O handling */
|
|
timer();
|
|
was_alarmed = FALSE;
|
|
}
|
|
|
|
/*
|
|
* Call the data procedure to handle each received
|
|
* packet.
|
|
*/
|
|
if (rbuf->receiver != NULL) {
|
|
# ifdef DEBUG_TIMING
|
|
l_fp dts = pts;
|
|
|
|
L_SUB(&dts, &rbuf->recv_time);
|
|
DPRINTF(2, ("processing timestamp delta %s (with prec. fuzz)\n", lfptoa(&dts, 9)));
|
|
collect_timing(rbuf, "buffer processing delay", 1, &dts);
|
|
bufcount++;
|
|
# endif
|
|
(*rbuf->receiver)(rbuf);
|
|
} else {
|
|
msyslog(LOG_ERR, "fatal: receive buffer callback NULL");
|
|
abort();
|
|
}
|
|
|
|
BLOCK_IO_AND_ALARM();
|
|
freerecvbuf(rbuf);
|
|
rbuf = get_full_recv_buffer();
|
|
}
|
|
# ifdef DEBUG_TIMING
|
|
get_systime(&tsb);
|
|
L_SUB(&tsb, &tsa);
|
|
if (bufcount) {
|
|
collect_timing(NULL, "processing", bufcount, &tsb);
|
|
DPRINTF(2, ("processing time for %d buffers %s\n", bufcount, lfptoa(&tsb, 9)));
|
|
}
|
|
}
|
|
# endif
|
|
|
|
/*
|
|
* Go around again
|
|
*/
|
|
|
|
# ifdef HAVE_DNSREGISTRATION
|
|
if (mdnsreg && (current_time - mdnsreg ) > 60 && mdnstries && sys_leap != LEAP_NOTINSYNC) {
|
|
mdnsreg = current_time;
|
|
msyslog(LOG_INFO, "Attempting to register mDNS");
|
|
if ( DNSServiceRegister (&mdns, 0, 0, NULL, "_ntp._udp", NULL, NULL,
|
|
htons(NTP_PORT), 0, NULL, NULL, NULL) != kDNSServiceErr_NoError ) {
|
|
if (!--mdnstries) {
|
|
msyslog(LOG_ERR, "Unable to register mDNS, giving up.");
|
|
} else {
|
|
msyslog(LOG_INFO, "Unable to register mDNS, will try later.");
|
|
}
|
|
} else {
|
|
msyslog(LOG_INFO, "mDNS service registered.");
|
|
mdnsreg = FALSE;
|
|
}
|
|
}
|
|
# endif /* HAVE_DNSREGISTRATION */
|
|
|
|
}
|
|
UNBLOCK_IO_AND_ALARM();
|
|
return 1;
|
|
}
|
|
#endif /* !SIM */
|
|
|
|
|
|
#if !defined(SIM) && defined(SIGDIE1)
|
|
/*
|
|
* finish - exit gracefully
|
|
*/
|
|
static void
|
|
finish_safe(
|
|
int sig
|
|
)
|
|
{
|
|
const char *sig_desc;
|
|
|
|
sig_desc = NULL;
|
|
#ifdef HAVE_STRSIGNAL
|
|
sig_desc = strsignal(sig);
|
|
#endif
|
|
if (sig_desc == NULL)
|
|
sig_desc = "";
|
|
msyslog(LOG_NOTICE, "%s exiting on signal %d (%s)", progname,
|
|
sig, sig_desc);
|
|
/* See Bug 2513 and Bug 2522 re the unlink of PIDFILE */
|
|
# ifdef HAVE_DNSREGISTRATION
|
|
if (mdns != NULL)
|
|
DNSServiceRefDeallocate(mdns);
|
|
# endif
|
|
peer_cleanup();
|
|
exit(0);
|
|
}
|
|
|
|
static RETSIGTYPE
|
|
finish(
|
|
int sig
|
|
)
|
|
{
|
|
signalled = 1;
|
|
signo = sig;
|
|
}
|
|
|
|
#endif /* !SIM && SIGDIE1 */
|
|
|
|
|
|
#ifndef SIM
|
|
/*
|
|
* wait_child_sync_if - implements parent side of -w/--wait-sync
|
|
*/
|
|
# ifdef HAVE_WORKING_FORK
|
|
static int
|
|
wait_child_sync_if(
|
|
int pipe_read_fd,
|
|
long wait_sync
|
|
)
|
|
{
|
|
int rc;
|
|
int exit_code;
|
|
time_t wait_end_time;
|
|
time_t cur_time;
|
|
time_t wait_rem;
|
|
fd_set readset;
|
|
struct timeval wtimeout;
|
|
|
|
if (0 == wait_sync)
|
|
return 0;
|
|
|
|
/* waitsync_fd_to_close used solely by child */
|
|
close(waitsync_fd_to_close);
|
|
wait_end_time = time(NULL) + wait_sync;
|
|
do {
|
|
cur_time = time(NULL);
|
|
wait_rem = (wait_end_time > cur_time)
|
|
? (wait_end_time - cur_time)
|
|
: 0;
|
|
wtimeout.tv_sec = wait_rem;
|
|
wtimeout.tv_usec = 0;
|
|
FD_ZERO(&readset);
|
|
FD_SET(pipe_read_fd, &readset);
|
|
rc = select(pipe_read_fd + 1, &readset, NULL, NULL,
|
|
&wtimeout);
|
|
if (-1 == rc) {
|
|
if (EINTR == errno)
|
|
continue;
|
|
exit_code = (errno) ? errno : -1;
|
|
msyslog(LOG_ERR,
|
|
"--wait-sync select failed: %m");
|
|
return exit_code;
|
|
}
|
|
if (0 == rc) {
|
|
/*
|
|
* select() indicated a timeout, but in case
|
|
* its timeouts are affected by a step of the
|
|
* system clock, select() again with a zero
|
|
* timeout to confirm.
|
|
*/
|
|
FD_ZERO(&readset);
|
|
FD_SET(pipe_read_fd, &readset);
|
|
wtimeout.tv_sec = 0;
|
|
wtimeout.tv_usec = 0;
|
|
rc = select(pipe_read_fd + 1, &readset, NULL,
|
|
NULL, &wtimeout);
|
|
if (0 == rc) /* select() timeout */
|
|
break;
|
|
else /* readable */
|
|
return 0;
|
|
} else /* readable */
|
|
return 0;
|
|
} while (wait_rem > 0);
|
|
|
|
fprintf(stderr, "%s: -w/--wait-sync %ld timed out.\n",
|
|
progname, wait_sync);
|
|
return ETIMEDOUT;
|
|
}
|
|
# endif /* HAVE_WORKING_FORK */
|
|
|
|
|
|
/*
|
|
* assertion_failed - Redirect assertion failures to msyslog().
|
|
*/
|
|
static void
|
|
assertion_failed(
|
|
const char *file,
|
|
int line,
|
|
isc_assertiontype_t type,
|
|
const char *cond
|
|
)
|
|
{
|
|
isc_assertion_setcallback(NULL); /* Avoid recursion */
|
|
|
|
msyslog(LOG_ERR, "%s:%d: %s(%s) failed",
|
|
file, line, isc_assertion_typetotext(type), cond);
|
|
msyslog(LOG_ERR, "exiting (due to assertion failure)");
|
|
|
|
#if defined(DEBUG) && defined(SYS_WINNT)
|
|
if (debug)
|
|
DebugBreak();
|
|
#endif
|
|
|
|
abort();
|
|
}
|
|
|
|
|
|
/*
|
|
* library_fatal_error - Handle fatal errors from our libraries.
|
|
*/
|
|
static void
|
|
library_fatal_error(
|
|
const char *file,
|
|
int line,
|
|
const char *format,
|
|
va_list args
|
|
)
|
|
{
|
|
char errbuf[256];
|
|
|
|
isc_error_setfatal(NULL); /* Avoid recursion */
|
|
|
|
msyslog(LOG_ERR, "%s:%d: fatal error:", file, line);
|
|
vsnprintf(errbuf, sizeof(errbuf), format, args);
|
|
msyslog(LOG_ERR, "%s", errbuf);
|
|
msyslog(LOG_ERR, "exiting (due to fatal error in library)");
|
|
|
|
#if defined(DEBUG) && defined(SYS_WINNT)
|
|
if (debug)
|
|
DebugBreak();
|
|
#endif
|
|
|
|
abort();
|
|
}
|
|
|
|
|
|
/*
|
|
* library_unexpected_error - Handle non fatal errors from our libraries.
|
|
*/
|
|
# define MAX_UNEXPECTED_ERRORS 100
|
|
int unexpected_error_cnt = 0;
|
|
static void
|
|
library_unexpected_error(
|
|
const char *file,
|
|
int line,
|
|
const char *format,
|
|
va_list args
|
|
)
|
|
{
|
|
char errbuf[256];
|
|
|
|
if (unexpected_error_cnt >= MAX_UNEXPECTED_ERRORS)
|
|
return; /* avoid clutter in log */
|
|
|
|
msyslog(LOG_ERR, "%s:%d: unexpected error:", file, line);
|
|
vsnprintf(errbuf, sizeof(errbuf), format, args);
|
|
msyslog(LOG_ERR, "%s", errbuf);
|
|
|
|
if (++unexpected_error_cnt == MAX_UNEXPECTED_ERRORS)
|
|
msyslog(LOG_ERR, "Too many errors. Shutting up.");
|
|
|
|
}
|
|
#endif /* !SIM */
|
|
|
|
#if !defined(SIM) && !defined(SYS_WINNT)
|
|
# ifdef DEBUG
|
|
|
|
/*
|
|
* moredebug - increase debugging verbosity
|
|
*/
|
|
static RETSIGTYPE
|
|
moredebug(
|
|
int sig
|
|
)
|
|
{
|
|
int saved_errno = errno;
|
|
|
|
if (debug < 255)
|
|
{
|
|
debug++;
|
|
msyslog(LOG_DEBUG, "debug raised to %d", debug);
|
|
}
|
|
errno = saved_errno;
|
|
}
|
|
|
|
|
|
/*
|
|
* lessdebug - decrease debugging verbosity
|
|
*/
|
|
static RETSIGTYPE
|
|
lessdebug(
|
|
int sig
|
|
)
|
|
{
|
|
int saved_errno = errno;
|
|
|
|
if (debug > 0)
|
|
{
|
|
debug--;
|
|
msyslog(LOG_DEBUG, "debug lowered to %d", debug);
|
|
}
|
|
errno = saved_errno;
|
|
}
|
|
|
|
# else /* !DEBUG follows */
|
|
|
|
|
|
/*
|
|
* no_debug - We don't do the debug here.
|
|
*/
|
|
static RETSIGTYPE
|
|
no_debug(
|
|
int sig
|
|
)
|
|
{
|
|
int saved_errno = errno;
|
|
|
|
msyslog(LOG_DEBUG, "ntpd not compiled for debugging (signal %d)", sig);
|
|
errno = saved_errno;
|
|
}
|
|
# endif /* !DEBUG */
|
|
#endif /* !SIM && !SYS_WINNT */
|