dist/ntp/scripts/monitoring/ntptrap

   1 #!/local/bin/perl --*-perl-*-
   2 ;#
   3 ;# ntptrap,v 3.1 1993/07/06 01:09:15 jbj Exp
   4 ;#
   5 ;# a client for the xntp mode 6 trap mechanism
   6 ;#
   7 ;# Copyright (c) 1992
   8 ;#  Rainer Pruy Friedrich-Alexander Universitaet Erlangen-Nuernberg
   9 ;#
  10 ;#
  11 ;#############################################################
  12 $0 =~ s!^.*/([^/]+)$!$1!;               # strip to filename
  13 ;# enforce STDOUT and STDERR to be line buffered
  14 $| = 1;
  15 select((select(STDERR),$|=1)[$[]);
  16
  17 ;#######################################
  18 ;# load utility routines and definitions
  19 ;#
  20 require('ntp.pl');                      # implementation of the NTP protocol
  21 use Socket;
  22
  23 #eval { require('sys/socket.ph'); require('netinet/in.ph') unless defined(&INADDR_ANY); } ||
  24 #do {
  25   #die("$0: $@") unless $[ == index($@, "Can't locate ");
  26   #warn "$0: $@";
  27   #warn "$0: supplying some default definitions\n";
  28   #eval 'sub INADDR_ANY { 0; } sub AF_INET {2;} sub SOCK_DGRAM {2;} 1;' || die "$0: $@";
  29 #};
  30 require('getopts.pl');                  # option parsing
  31 require('ctime.pl');                    # date/time formatting
  32
  33 ;######################################
  34 ;# define some global constants
  35 ;#
  36 $BASE_TIMEOUT=10;
  37 $FRAG_TIMEOUT=10;
  38 $MAX_TRY = 5;
  39 $REFRESH_TIME=60*15;            # 15 minutes (server uses 1 hour)
  40 $ntp'timeout = $FRAG_TIMEOUT; #';
  41 $ntp'timeout if 0;
  42
  43 ;######################################
  44 ;# now process options
  45 ;#
  46 sub usage
  47 {
  48     die("usage: $0 [-n] [-p <port>] [-l <logfile>] [host] ...\n");
  49 }
  50
  51 $opt_l = "/dev/null";   # where to write debug messages to
  52 $opt_p = 0;             # port to use locally - (0 does mean: will be choosen by kernel)
  53
  54 &usage unless &Getopts('l:p:');
  55 &Getopts if 0;  # make -w happy
  56
  57 @Hosts = ($#ARGV < $[) ? ("localhost") : @ARGV;
  58
  59 ;# setup for debug output
  60 $DEBUGFILE=$opt_l;
  61 $DEBUGFILE="&STDERR" if $DEBUGFILE eq '-';
  62
  63 open(DEBUG,">>$DEBUGFILE") || die("Cannot open \"$DEBUGFILE\": $!\n");
  64 select((select(DEBUG),$|=1)[$[]);
  65
  66 ;# &log prints a single trap record (adding a (local) time stamp)
  67 sub log
  68 {
  69     chop($date=&ctime(time));
  70     print "$date ",@_,"\n";
  71 }
  72
  73 sub debug
  74 {
  75     print DEBUG @_,"\n";
  76 }
  77 ;#
  78 $proto_udp = (getprotobyname('udp'))[$[+2] ||
  79                 (warn("$0: Could not get protocoll number for 'udp' using 17"), 17);
  80
  81 $ntp_port = (getservbyname('ntp','udp'))[$[+2] ||
  82               (warn("$0: Could not get port number for service ntp/udp using 123"), 123);
  83
  84 ;#
  85 socket(S, &AF_INET, &SOCK_DGRAM, $proto_udp) || die("Cannot open socket: $!\n");
  86
  87 ;#
  88 bind(S, pack("S n a4 x8", &AF_INET, $opt_p, &INADDR_ANY)) ||
  89     die("Cannot bind: $!\n");
  90
  91 ($my_port, $my_addr) = (unpack("S n a4 x8",getsockname(S)))[$[+1,$[+2];
  92 &log(sprintf("Listening at address %d.%d.%d.%d port %d",
  93              unpack("C4",$my_addr), $my_port));
  94
  95 ;# disregister with all servers in case of termination
  96 sub cleanup
  97 {
  98     &log("Aborted by signal \"$_[$[]\"") if defined($_[$[]);
  99
 100     foreach (@Hosts)
 101     {
 102         if ( ! defined($Host{$_}) )
 103         {
 104                 print "no info for host '$_'\n";
 105                 next;
 106         }
 107         &ntp'send(S,31,0,"",pack("Sna4x8",&AF_INET,$ntp_port,$Host{$_})); #';
 108     }
 109     close(S);
 110     exit(2);
 111 }
 112
 113 $SIG{'HUP'} = 'cleanup';
 114 $SIG{'INT'} = 'cleanup';
 115 $SIG{'QUIT'} = 'cleanup';
 116 $SIG{'TERM'} = 'cleanup';
 117
 118 0 && $a && $b;
 119 sub timeouts                    # sort timeout id array
 120 {
 121     $TIMEOUTS{$a} <=> $TIMEOUTS{$b};
 122 }
 123
 124 ;# a Request element looks like: pack("a4SC",addr,associd,op)
 125 @Requests= ();
 126
 127 ;# compute requests for set trap control msgs to each host given
 128 {
 129     local($name,$addr);
 130
 131     foreach (@Hosts)
 132     {
 133         if (/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/)
 134         {
 135             ($name,$addr) =
 136                 (gethostbyaddr(pack("C4",$1,$2,$3,$4),&AF_INET))[$[,$[+4];
 137             unless (defined($name))
 138             {
 139                 $name = sprintf("[[%d.%d.%d.%d]]",$1,$2,$3,$4);
 140                 $addr = pack("C4",$1,$2,$3,$4);
 141             }
 142         }
 143         else
 144         {
 145             ($name,$addr) = (gethostbyname($_))[$[,$[+4];
 146             unless (defined($name))
 147             {
 148                 warn "$0: unknown host \"$_\" - ignored\n";
 149                 next;
 150             }
 151         }
 152         next if defined($Host{$name});
 153         $Host{$name} = $addr;
 154         $Host{$_} = $addr;
 155         push(@Requests,pack("a4SC",$addr,0,6)); # schedule a set trap request for $name
 156     }
 157 }
 158
 159 sub hostname
 160 {
 161     local($addr) = @_;
 162     return $HostName{$addr} if defined($HostName{$addr});
 163     local($name) = gethostbyaddr($addr,&AF_INET);
 164     &debug(sprintf("hostname(%d.%d.%d.%d) = \"%s\"",unpack("C4",$addr),$name))
 165         if defined($name);
 166     defined($name) && ($HostName{$addr} = $name) && (return $name);
 167     &debug(sprintf("Failed to get name for %d.%d.%d.%d",unpack("C4",$addr)));
 168     return sprintf("[%d.%d.%d.%d]",unpack("C4",$addr));
 169 }
 170
 171 ;# when no hosts were given on the commandline no requests have been scheduled
 172 &usage unless (@Requests);
 173
 174 &debug(sprintf("%d request(s) scheduled",scalar(@Requests)));
 175 grep(&debug("    - ".$_),keys(%Host));
 176
 177 ;# allocate variables;
 178 $addr="";
 179 $assoc=0;
 180 $op = 0;
 181 $timeout = 0;
 182 $ret="";
 183 %TIMEOUTS = ();
 184 %TIMEOUT_PROCS = ();
 185 @TIMEOUTS = ();
 186
 187 $len = 512;
 188 $buf = " " x $len;
 189
 190 while (1)
 191 {
 192     if (@Requests || @TIMEOUTS)         # if there is some work pending
 193     {
 194         if (@Requests)
 195         {
 196             ($addr,$assoc,$op) = unpack("a4SC",($req = shift(@Requests)));
 197             &debug(sprintf("Request: %s: %s(%d)",&hostname($addr), &ntp'cntrlop_name($op), $assoc)); #';))
 198             $ret = &ntp'send(S,$op,$assoc,"", #'(
 199                              pack("Sna4x8",&AF_INET,$ntp_port,$addr));
 200             &set_timeout("retry-".unpack("H*",$req),time+$BASE_TIMEOUT,
 201                          sprintf("&retry(\"%s\");",unpack("H*",$req)));
 202
 203             last unless (defined($ret)); # warn called by ntp'send();
 204
 205             ;# if there are more requests just have a quick look for new messages
 206             ;# otherwise grant server time for a response
 207             $timeout = @Requests ? 0 : $BASE_TIMEOUT;
 208         }
 209         if ($timeout && @TIMEOUTS)
 210         {
 211             ;# ensure not to miss a timeout
 212             if ($timeout + time > $TIMEOUTS{$TIMEOUTS[$[]})
 213             {
 214                 $timeout = $TIMEOUTS{$TIMEOUTS[$[]} - time;
 215                 $timeout = 0 if $timeout < 0;
 216             }
 217         }
 218     }
 219     else
 220     {
 221         ;# no work yet - wait for some messages dropping in
 222         ;# usually this will not hapen as the refresh semantic will
 223         ;# always have a pending timeout
 224         undef($timeout);
 225     }
 226
 227     vec($mask="",fileno(S),1) = 1;
 228     $ret = select($mask,undef,undef,$timeout);
 229
 230     warn("$0: select: $!\n"),last if $ret < 0;  # give up on error return from select
 231
 232     if ($ret == 0)
 233     {
 234         ;# timeout
 235         if (@TIMEOUTS && time > $TIMEOUTS{$TIMEOUTS[$[]})
 236         {
 237             ;# handle timeout
 238             $timeout_proc =
 239                 (delete $TIMEOUT_PROCS{$TIMEOUTS[$[]},
 240                  delete $TIMEOUTS{shift(@TIMEOUTS)})[$[];
 241             eval $timeout_proc;
 242             die "timeout eval (\"$timeout_proc\"): $@\n" if $@;
 243         }
 244         ;# else: there may be something to be sent
 245     }
 246     else
 247     {
 248         ;# data avail
 249         $from = recv(S,$buf,$len,0);
 250         ;# give up on error return from recv
 251         warn("$0: recv: $!\n"), last unless (defined($from));
 252
 253         $from = (unpack("Sna4",$from))[$[+2]; # keep host addr only
 254         ;# could check for ntp_port - but who cares
 255         &debug("-Packet from ",&hostname($from));
 256
 257         ;# stuff packet into ntp mode 6 receive machinery
 258         ($ret,$data,$status,$associd,$op,$seq,$auth_keyid) =
 259             &ntp'handle_packet($buf,$from); # ';
 260         &debug(sprintf("%s uses auth_keyid %d",&hostname($from),$auth_keyid)) if defined($auth_keyid);
 261         next unless defined($ret);
 262
 263         if ($ret eq "")
 264         {
 265             ;# handle packet
 266             ;# simple trap response messages have neither timeout nor retries
 267             &clear_timeout("retry-".unpack("H*",pack("a4SC",$from,$associd,$op))) unless $op == 7;
 268             delete $RETRY{pack("a4SC",$from,$associd,$op)} unless $op == 7;
 269
 270             &process_response($from,$ret,$data,$status,$associd,$op,$seq,$auth_keyid);
 271         }
 272         else
 273         {
 274             ;# some kind of error
 275             &log(sprintf("%50s: %s: %s",(gethostbyaddr($from,&AF_INET))[$[],$ret,$data));
 276             if ($ret ne "TIMEOUT" && $ret ne "ERROR")
 277             {
 278                 &clear_timeout("retry-".unpack("H*",pack("a4SC",$from,$associd,$op)));
 279             }
 280         }
 281     }
 282
 283 }
 284
 285 warn("$0: terminating\n");
 286 &cleanup;
 287 exit 0;
 288
 289 ;##################################################
 290 ;# timeout support
 291 ;#
 292 sub set_timeout
 293 {
 294     local($id,$time,$proc) = @_;
 295
 296     $TIMEOUTS{$id} = $time;
 297     $TIMEOUT_PROCS{$id} = $proc;
 298     @TIMEOUTS = sort timeouts keys(%TIMEOUTS);
 299     chop($date=&ctime($time));
 300     &debug(sprintf("Schedule timeout \"%s\" for %s", $id, $date));
 301 }
 302
 303 sub clear_timeout
 304 {
 305     local($id) = @_;
 306     delete $TIMEOUTS{$id};
 307     delete $TIMEOUT_PROCS{$id};
 308     @TIMEOUTS = sort timeouts keys(%TIMEOUTS);
 309     &debug("Clear  timeout \"$id\"");
 310 }
 311
 312 0 && &refresh;
 313 sub refresh
 314 {
 315     local($addr) = @_[$[];
 316     $addr = pack("H*",$addr);
 317     &debug(sprintf("Refreshing trap for %s", &hostname($addr)));
 318     push(@Requests,pack("a4SC",$addr,0,6));
 319 }
 320
 321 0 && &retry;
 322 sub retry
 323 {
 324     local($tag) = @_;
 325     $tag = pack("H*",$tag);
 326     $RETRY{$tag} = 0 if (!defined($RETRY{$tag}));
 327
 328     if (++$RETRY{$tag} > $MAX_TRY)
 329     {
 330         &debug(sprintf("Retry failed: %s assoc %5d op %d",
 331                        &hostname(substr($tag,$[,4)),
 332                        unpack("x4SC",$tag)));
 333         return;
 334     }
 335     &debug(sprintf("Retrying: %s assoc %5d op %d",
 336                        &hostname(substr($tag,$[,4)),
 337                        unpack("x4SC",$tag)));
 338     push(@Requests,$tag);
 339 }
 340
 341 sub process_response
 342 {
 343     local($from,$ret,$data,$status,$associd,$op,$seq,$auth_keyid) = @_;
 344
 345     $msg="";
 346     if ($op == 7)               # trap response
 347     {
 348         $msg .= sprintf("%40s trap#%-5d",
 349                         &hostname($from),$seq);
 350         &debug (sprintf("\nTrap %d associd %d:\n%s\n===============\n",$seq,$associd,$data));
 351         if ($associd == 0)      # system event
 352         {
 353             $msg .= "  SYSTEM   ";
 354             $evnt = &ntp'SystemEvent($status); #';
 355             $msg .= "$evnt ";
 356             ;# for special cases add additional info
 357             ($stratum) = ($data =~ /stratum=(\d+)/);
 358             ($refid) = ($data =~ /refid=([\w\.]+)/);
 359             $msg .= "stratum=$stratum refid=$refid";
 360             if ($refid =~ /\[?(\d+)\.(\d+)\.(\d+)\.(\d+)/)
 361             {
 362                 local($x) = (gethostbyaddr(pack("C4",$1,$2,$3,$4),&AF_INET));
 363                 $msg .= " " . $x if defined($x)
 364             }
 365             if ($evnt eq "event_sync_chg")
 366             {
 367                 $msg .= sprintf("%s %s ",
 368                                 &ntp'LI($status), #',
 369                                 &ntp'ClockSource($status) #'
 370                                 );
 371             }
 372             elsif ($evnt eq "event_sync/strat_chg")
 373             {
 374                 ($peer) = ($data =~ /peer=([0-9]+)/);
 375                 $msg .= " peer=$peer";
 376             }
 377             elsif ($evnt eq "event_clock_excptn")
 378             {
 379                 if (($device) = ($data =~ /device=\"([^\"]+)\"/))
 380                 {
 381                     ($cstatus) = ($data =~ /refclockstatus=0?x?([\da-fA-F]+)/);
 382                     $Cstatus = hex($cstatus);
 383                     $msg .= sprintf("- %-32s",&ntp'clock_status($Cstatus)); #');
 384                     ($timecode) = ($data =~ /timecode=\"([^\"]+)\"/);
 385                     $msg .= " \"$device\" \"$timecode\"";
 386                 }
 387                 else
 388                 {
 389                     push(@Requests,pack("a4SC",$from, $associd, 4));
 390                 }
 391             }
 392         }
 393         else                    # peer event
 394         {
 395             $msg .= sprintf("peer %5d ",$associd);
 396             ($srcadr) = ($data =~ /srcadr=\[?([\d\.]+)/);
 397             $msg .= sprintf("%-18s %40s ", "[$srcadr]",
 398                             &hostname(pack("C4",split(/\./,$srcadr))));
 399             $evnt = &ntp'PeerEvent($status); #';
 400             $msg .= "$evnt ";
 401             ;# for special cases include additional info
 402             if ($evnt eq "event_clock_excptn")
 403             {
 404                 if (($device) = ($data =~ /device=\"([^\"]+)\"/))
 405                 {
 406                     ;#&debug("----\n$data\n====\n");
 407                     ($cstatus) = ($data =~ /refclockstatus=0?x?([\da-fA-F]+)/);
 408                     $Cstatus = hex($cstatus);
 409                     $msg .= sprintf("- %-32s",&ntp'clock_status($Cstatus)); #');
 410                     ($timecode) = ($data =~ /timecode=\"([^\"]+)\"/);
 411                     $msg .= " \"$device\" \"$timecode\"";
 412                 }
 413                 else
 414                 {
 415                     ;# no clockvars included - post a cv request
 416                     push(@Requests,pack("a4SC",$from, $associd, 4));
 417                 }
 418             }
 419             elsif ($evnt eq "event_stratum_chg")
 420             {
 421                 ($stratum) = ($data =~ /stratum=(\d+)/);
 422                 $msg .= "new stratum $stratum";
 423             }
 424         }
 425     }
 426     elsif ($op == 6)            # set trap resonse
 427     {
 428         &debug("Set trap ok from ",&hostname($from));
 429         &set_timeout("refresh-".unpack("H*",$from),time+$REFRESH_TIME,
 430                      sprintf("&refresh(\"%s\");",unpack("H*",$from)));
 431         return;
 432     }
 433     elsif ($op == 4)            # read clock variables response
 434     {
 435         ;# status of clock
 436         $msg .= sprintf(" %40s ", &hostname($from));
 437         if ($associd == 0)
 438         {
 439             $msg .= "system clock status: ";
 440         }
 441         else
 442         {
 443             $msg .= sprintf("peer %5d clock",$associd);
 444         }
 445         $msg .= sprintf("%-32s",&ntp'clock_status($status)); #');
 446         ($device) = ($data =~ /device=\"([^\"]+)\"/);
 447         ($timecode) = ($data =~ /timecode=\"([^\"]+)\"/);
 448         $msg .= " \"$device\" \"$timecode\"";
 449     }
 450     elsif ($op == 31)           # unset trap response (UNOFFICIAL op)
 451     {
 452         ;# clear timeout
 453         &debug("Clear Trap ok from ",&hostname($from));
 454         &clear_timeout("refresh-".unpack("H*",$from));
 455         return;
 456     }
 457     else                        # unexpected response
 458     {
 459         $msg .= "unexpected response to op $op assoc=$associd";
 460         $msg .= sprintf(" status=%04x",$status);
 461     }
 462     &log($msg);
 463 }