#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
BEGIN
{
  $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
}
use lib "$::XCATROOT/lib/perl";
use Sys::Syslog;
use xCAT::Table;
use xCAT_plugin::ipmi;
use xCAT_monitoring::monitorctrl;
use Socket;

#-------------------------------------------------------------------------------
=head1  xcat_traphandler  
=head2   Description
  Script for SNMP trap handling. 

=cut
#-------------------------------------------------------------------------------
# admin needs to create a mail aliase called alerts
# put "alerts: emailadd,emailaddr.." to /etc/aliases file
# then run newaliases command
my $MAILTO="alerts";

my $message, $briefmsg;
my $pair;
my $node1;
my $info;
my $severity_type;
my $severity;

#get settings
$EMAIL=0, $LOG=0, $RUNCMD=0, $INGNORE=0;
%hashI=(),%hashE=(),%hashL=(),%hashR=(); 
my %settings=xCAT_monitoring::monitorctrl->getPluginSettings("snmpmon");
my $i=$settings{'ignore'};
if ($i) { %hashI =parseSettings($i); }
my $e=$settings{'email'};
if ($e) { %hashE=parseSettings($e); }
my $l=$settings{'log'};
if ($l) { %hashL=parseSettings($l); }
my $r=$settings{'runcmd'};
if ($r) { %hashR=parseSettings($r); }

# read host name
my $host=<STDIN>; 
chomp($host);

# read the host ip
my $ip=<STDIN>;
chomp($ip);

# read uptime
my $uptimeline=<STDIN>;
chomp($uptimeline);
my  @a=split(/ /, $uptimeline);
my  $oid=shift @a;
my  $value=join(' ', @a);
$message .= "    $oid=$value\n";

# read trapid 
my $trapidline=<STDIN>;
chomp($trapidline);
@a=split(/ /, $trapidline);
$oid=shift @a;
$value=join(' ', @a);
$message .= "    $oid=$value\n";
checkWithOid($oid, $value);
#print "I=$IGNORE,E=$EMAIL, L=$LOG, R=$RUNCMD\n";
if ($IGNORE) { exit 0;}

#for ipmi traps, the values is: SNMPv2-SMI::enterprises.3183.1.1.0.x, x is the ipmi trap id.
$value =~ s/(SNMPv2-SMI::enterprises\.3183\.1\.1\.0\.)//g;
my $trapid=$value; 

#print "trapid=$trapid\n";



my $holder;
my $begin=1;
my $pair;
while ($temp=<STDIN>) {
  chomp($temp);
  my $temp1=$temp; #save the one with quotes
  $temp1 =~ s/\"//g;
  my $c1=length($temp);
  my $c2=length($temp1);
  
  
  if (($c1-$c2)%2 == 0) { 
    if ($begin==1) { # single line
      $pair=$temp;
    }
    else { # middle multi-line
      $pair .= " $temp";
      next;  
    }
  } else { # multi line
    if ($begin==1) {
      $pair=$temp; #start of multi-line 
      $begin=0;
      next;
    } else { 
      $pair .= " $temp";  #end of multi-line
      $begin=1;
    }
  }
   
  @a=split(/ /, $pair);
  $oid=shift @a;
  $value=join(' ', @a);

  
  #for BladeCenter MM traps and RSA II traps,  creat a brief message 
  if ($oid =~ /BLADESPPALT-MIB::spTrapAppId|RSASPPALT-MIB::ibmSpTrapAppId/) {
    $briefmsg .= "  App ID: $value\n";  
  }
  elsif ($oid =~ /BLADESPPALT-MIB::spTrapAppType|RSASPPALT-MIB::ibmSpTrapAppType/) {
    $briefmsg .= "  App Alert Type: $value\n";
  } 
  elsif ($oid =~ /BLADESPPALT-MIB::spTrapMsgText|RSASPPALT-MIB::ibmSpTrapMsgText/) {
    $briefmsg .= "  Message: $value\n";  
  } 
  elsif ($oid =~ /BLADESPPALT-MIB::spTrapBladeName/) {
    my $temp="$value";
    $temp =~ /^\"(.*)\"/;
    if ($1) {
      $briefmsg .= "  Blade Name: $value\n";
      $node1=$1;
    }
  } 
  elsif (($oid =~ /BLADESPPALT-MIB::spTrapSourceId/)) {
    $briefmsg .= "  Error Source=$value\n";       
  }   
  elsif ($oid =~ /BLADESPPALT-MIB::spTrapPriority|RSASPPALT-MIB::ibmSpTrapPriority/) {
    # Critical Alert(0), Major(1), Non-Critical Alert(2), System Alert(4), 
    # Recovery Alert(8), Informational Only Alert(255)
    if ($value==0) {
      $severity="Critical Alert";
      $severity_type="Critical";
    } elsif ($value==1)  {
      $severity="Major Alert";
      $severity_type="Critical";
    } elsif ($value==2)  {
      $severity="Non-Critical Alert";
      $severity_type="Warning";
    } elsif ($value==4)  {
      $severity="System Alert";
      $severity_type="Warning";
    } elsif ($value==8)  {
      $severity="Recovery Alert";
      $severity_type="Informational";
    } elsif ($value==255)  {
      $severity="Informational Alert";
      $severity_type="Informational";
    }
  } 
  elsif ($oid =~ /enterprises\.3183\.1\.1\.1/) { #IPMI PRTs (traps)
    $node1=$host;
    $node1 =~ s/(-(eth|man)\d+)?(\..*)?$//;

    $ip1=$ip;
    $ip1 =~ /(\d+\.\d+\.\d+\.\d+)/;
    $ip1=$1;

    # get the host name if it is unknown
    if ($node1 =~/<UNKNOWN>/) {
      my $iaddr = inet_aton($ip1);
      my ($name) = gethostbyaddr($iaddr, AF_INET);
      if ($name) {
        $node1=$name; 
        $host=$name;
        @shorthost = split(/\./, $node1);
        $node1=$shorthost[0];
      }
    }

    #node1 is the bmc name, we need the node that bmc connects to to call xCAT
    my $realnode;
    my $ipmitab = xCAT::Table->new('ipmi');
    if (defined($ipmitab)) {
      my @tmp1=$ipmitab->getAllNodeAttribs(['node','bmc']);
      if (defined(@tmp1) && (@tmp1 > 0)) {
        foreach(@tmp1) {
          if ($_->{bmc} eq $node1) { $realnode=$_->{node}; last;}
        }        
      }
      $ipmitab->close();
    }
    if ($realnode) {$node1=$realnode;}

    # make the vlaue into a hex array for decoding
    $value =~ s/\"//g;
    my @varray=split(/\s+/, $value);
    foreach (@varray) { $_=hex($_); }
    my $error = xCAT_plugin::ipmi->decodealert($trapid, $node1, @varray);
    $briefmsg .= $error;

    #severity value from decodealert are: 
    #LOG,INFORMATION,OK,CRITICAL,NON-RECOVERABLE,MONITOR and UNKNOWN-SEVERITY
    $severity_type="Warning";
    if ($error) {
      @tempArray=split(/\:/, $error);  
      $severity=$tempArray[0];
      if ($severity eq "LOG") {#in fact this is called "unspecifiled"
        $severity_type="Warning";
      } 
      elsif($severity eq  "INFORMATION") {
        $severity_type="Informational";
      }
      elsif($severity eq  "OK") {
        $severity_type="Informational";
      }
      elsif($severity eq "CRITICAL") {
        $severity_type="Critical";
      }
      elsif($severity eq "NON-RECOVERABLE") {
        $severity_type="Critical";
      }
    } 
  }
 
  $message .= "    $oid=$value\n";

  #check agains the settings 
  $value =~ s/\"//g;  
  checkWithOid($oid, $value);
  #print "I=$IGNORE,E=$EMAIL, L=$LOG, R=$RUNCMD\n";
  if ($IGNORE) { exit 0;} 
}

if (!$severity_type) { $severity_type="Warning"; }
if ((!$IGNORE) && exists($hashI{$severity_type})) { exit 0; }
if ((!$EMAIL) && exists($hashE{$severity_type})) { $EMAIL=1; }
if ((!$LOG) && exists($hashL{$severity_type})) { $LOG=1; }
if ((!$RUNCMD) && exists($hashR{severity_type})) { $RUNCMD=1; }
#print "I=$IGNORE,E=$EMAIL, L=$LOG, R=$RUNCMD\n";

#email 'alerts' aliase
if ($EMAIL || ((keys(%hashE)==0) && ($severity_type =~/Critical|Warning/))) { 
  #($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst)=localtime(time);
  #$datetime=sprintf "%2d-%02d-%04d %02d:%02d:%02d", $mon+1,$mday,$year+1900,$hour,$min,$sec;
  #my $head="SNMP $severity received from $host($ip) on $datetime\n$briefmsg\n";
  my $head="SNMP $severity received from $host($ip)\n$briefmsg\n";
  my $middle="Trap details:\n$message\n";
  my $end;
  if ($node1) { $info= getMoreInfo($node1);}
  if ($info) {
   $end ="Additonal Info from xCAT:\n$info\n";
  }  

  #email the full message to the alerts aliase
  my $cmd="echo \'$head$middle$end\' \| mail -s \"$severity_type: Cluster SNMP Alert\!\" $MAILTO";
  `$cmd`;
}

#log to syslog if needed. default is log all
if ($LOG || (keys(%hashL)==0)) {
  my $head="SNMP $severity received from $host($ip).";
  my $body;
  if ($briefmsg) { $body=$briefmsg;} 
  else { $body=$message; }

  openlog("xCATMon Event","","local4");  
  if ($severity_type eq "Informational") {
    syslog("local4|info", "$head\n$body\n");
  } else {
    syslog("local4|err", "$head\n$body\n");
  }
  closelog();
}

#run user defined commands if needed.
if ($RUNCMD) {
  my $scripts=$settings{'cmds'};
  while ($scripts =~ s/^([^,]+)(,)*//) {
     my $cmd="echo \'host=$host\nip=$ip\n$message\n\' \| $1";
     `$cmd`;   
  }
}


#--------------------------------------------------------------------------------
=head3    getMoreInfo
      This function returns the node module/type, serial number, position etc. 
    Arguments:
       node-- name of the node.
    Returns:
       A string with node info ready to display.
=cut
#--------------------------------------------------------------------------------
sub getMoreInfo {
  my $node=shift; 
  my $pos,$vpd; 
     
  #get module name and serial number from the xCAT DB.
  my $table=xCAT::Table->new("vpd", -create =>1);
  if ($table) {
    my $ref = $table->getNodeAttribs($node, ['serial', 'mtm']);
    if ($ref) {
      if($ref->{mtm}) { $vpd .= "  Type/Mudule: ". $ref->{mtm} ."\n"; }
      if($ref->{serial}) { $vpd .= "  Serial Number: ". $ref->{serial} ."\n";}
    }
    $table->close();
  }

  # get the info from rinv command if nothing in the vpd table
  if (!$vpd) { 
    my $result=`XCATBYPASS=Y $XCATROOT/bin/rinv $node all 2>&1 | egrep -i '(model|serial)' | grep -v Univ`; 
    if ($? == 0) {#success
        chomp($result);
        my @b=split(/\n/, $result);
        foreach (@b) {
          s/^(.*)\:(.*)\:(.*)$/$2: $3/; 
	  $vpd .= " $_\n";
        }
     }
  }
    

  #get the position
  my $table1=xCAT::Table->new("nodepos", -create =>1);
  if ($table1) {
    my $ref1 = $table1->getNodeAttribs($node, ['rack', 'u', 'chassis', 'slot',  'room']);
    if ($ref1) {
      if($ref1->{room}) { $pos .= "  Room: ". $ref1->{room} ."\n"; }
      if($ref1->{rack}) { $pos .= "  Rack: ". $ref1->{rack} ."\n"; }
      if($ref1->{u}) { $pos .= "  Vertial position: ". $ref1->{u} ."\n"; }
      if($ref1->{chassis}) { $pos .= "  Chassis: ". $ref1->{chassis} ."\n"; }
      if($ref1->{slot}) { $pos .= "  Slot: ". $ref1->{slot} ."\n"; }
    }
    $table1->close();
  }

  if (($pos) || ($vpd)) {
    return "  Node: $node\n$vpd$pos";
  } 
 
  return "";
}


#--------------------------------------------------------------------------------
=head3   parseSettings 
      This function takes a setting string which looks like "key1=value1,key2=value2..."
      and returns a hash (key1=>value1, key2=>value2...). 
    Arguments:
       setting  the setting string. 
    Returns:
       A hash. 
=cut
#--------------------------------------------------------------------------------
sub parseSettings {
  my $settings=shift;
  my %ret=();
  while (($settings =~ s/^(Informational|Warning|Critical|All|None)()(,)*//) ||
         ($settings =~ s/^([^\=]+)=(\"[^\"]+\")(,)*//) || 
         ($settings =~ s/^([^\=]+)=([^\"\,]+)(,)*//)) {
    # print "$1=$2\n";
    $ret{$1}=$2;
  }

  return %ret;
}

#--------------------------------------------------------------------------------
=head3   checkWithOid 
      This function checks the input strings with the setting to see what
      actions need to be done for this event.  
    Arguments:
       oid       the oid string
       value     the value string
    Returns:
       none. The variables $EMAIL, $LOG, $IGNORE and $RUNCMD may be changed.
=cut
#--------------------------------------------------------------------------------
sub checkWithOid {
  $o=shift;
  $v=shift;

  sub checking {
    my $hashX=shift;
    
    if (exists($hashX->{'All'})) { return 1;  }     
    if (exists($hashX->{'None'})) { return 0;  }     
    if (exists($hashX->{$o}) && ($hashX->{$oid} eq $v)) {return 1; } 
    return 0;
  }

  if ((!$IGNORE) && (keys(%hashI)>0)) {
    $IGNORE=checking(\%hashI);
    if ($IGNORE) { return;}
  }

  if ((!$EMAIL) && (keys(%hashE)>0)) {
    $EMAIL=checking(\%hashE);
  }

  if ((!$LOG) && (keys(%hashL)>0)) {
    $LOG=checking(\%hashL);
  }

  if ((!$RUNCMD) && (keys(%hashR)>0)) {
    $RUNCMD=checking(\%hashR);
  }
}