parse-ns.in 17.8 KB
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#!/usr/bin/perl -wT
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#
# EMULAB-COPYRIGHT
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# Copyright (c) 2000-2006 University of Utah and the Flux Group.
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# All rights reserved.
#

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use English;
use Getopt::Std;
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use Socket;
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use File::Basename;
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#
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# Parse an ns file. Since the parser runs arbitrary NS file for the user,
# this cannot be safely done on boss without jumping through huge hoops
# to secure tcl and the DB. Yuck! So, instead of running the parser on boss,
# we run it over on ops. This first version operates like this:
#
# NB: This script is setuid.
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#
sub usage()
{
    print STDOUT
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	"Usage: parse-ns [options] pid gid eid nsfile\n".
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        "Where options and arguments are those required by parse.tcl\n";
 
    exit(-1);
}
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my $optlist  = "nqap";
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my $anonmode = 0;
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my $passmode = 0;
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my $impotent = 0;
my $debug    = 0;
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#
# Configure variables
#
my $TB       = "@prefix@";
my $TBOPS    = "@TBOPSEMAIL@";
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my $CONTROL  = "@USERNODE@";
my $TESTMODE = @TESTMODE@;

# Locals
my $infile   = "parse.input";
my $outfile  = "parse.output";
my $SAVEUID  = $UID;
my $dbuid;
my $pid;
my $gid;
my $eid;
my $nsfile;
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#
# Turn off line buffering on output
#
$| = 1;

#
# Untaint the path
# 
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$ENV{'PATH'} = "$TB/bin:$TB/sbin:/bin:/usr/bin:/sbin:/usr/sbin";
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delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};

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if ($TESTMODE) {
    # In testmode, drop privs (my devel tree at home is TESTMODE=1)
    $EUID = $UID;
}
elsif ($EUID != 0) {
    # We don't want to run this script unless its the real version.
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    die("Must be root! Maybe its a development version?");
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}

# This script is setuid, so please do not run it as root. Hard to track
# what has happened.
if ($UID == 0) {
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    die("Please do not run this as root! Its already setuid!");
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}

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#
# Testbed Support libraries
#
use lib "@prefix@/lib";
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use libdb;
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use libtestbed;
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use libtblog;
use libtblog qw(dblog *SERR);
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use NodeType;
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use constant false => 0;
use constant true  => 1;

sub parse_error($);

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#
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# Parse command arguments. Once we return from getopts, all that should
# left are the required arguments.
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#
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%options = ();
if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{"a"})) {
    $anonmode = 1;
}
if (defined($options{"n"})) {
    $impotent = 1;
}
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if (defined($options{"p"})) {
    $passmode = 1;
}
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if (@ARGV != 4 && @ARGV != 1) {
    usage();
}
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if (@ARGV == 1) {
    $nsfile = $ARGV[0];
}
else {
    $pid   = $ARGV[0];
    $gid   = $ARGV[1];
    $eid   = $ARGV[2];
    $nsfile= $ARGV[3];
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}

#
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# Must taint check!
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#
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if ($nsfile =~ /^([-\w\/\.]+)$/) {
    $nsfile = $1;
}
else {
    die("Bad data in argument: $nsfile.");
}
   
if (defined($pid)) {
    if ($pid =~ /^([-\w]+)$/) {
	$pid = $1;
    }
    else {
	die("Bad data in argument: $pid.");
    }
    if ($eid =~ /^([-\w]+)$/) {
	$eid = $1;
    }
    else {
	die("Bad data in argument: $eid.");
    }
    if ($gid =~ /^([-\w]+)$/) {
	$gid = $1;
    }
    else {
	die("Bad data in argument: $gid.");
    }
}

# Remove temps cause of swapin by alternates.
unlink($infile);
unlink($outfile);

if (!$TESTMODE) {
    #
    # Get DB uid for sending over to ops. In testmode, it runs locally
    # as the user running the testsuite, obviously.
    #
    if (! UNIX2DBUID($UID, \$dbuid)) {
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	tbdie("You do not exist in the Emulab Database!");
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    }
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    # Run as the user for most of this script.
    $EUID = $UID;
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}

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# Create the defs files.
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sub GenDefsFile($);
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GenDefsFile($infile);

# Now append the NS file to. This part is hokey. Fix later.
system("cat $nsfile >> $infile") == 0
    or die("Could not combine TCL defs file and the NS file!\n");

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#
# Touch the output file, to avoid a root owned, 644 file. 
#
if (-e $outfile) {
    unlink($outfile) or
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	tbdie("Could not unlink $outfile");
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}
system("touch $outfile") == 0 or
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    tbdie("Could not create $outfile");
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#
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# Build up a new command line to run the parser on ops, writing the
# result back to a file if not in anonmode. Remember to tack on the
# user ID to flip to, when not in testmode.
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#
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my $cmdargs = "$TB/libexec/ns2ir/parse.proxy ";
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$cmdargs .= " -u $dbuid"
    if (defined($dbuid));
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$cmdargs .= " -- ";
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$cmdargs .= " -a"
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    if ($anonmode);
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$cmdargs .= " -n"
    if (defined($options{"n"}));
$cmdargs .= " -q"
    if (defined($options{"q"}));
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$cmdargs .= " -p"
    if ($passmode);
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$cmdargs .= " $pid $gid $eid"
    if (!$anonmode);
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#
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# Run parser, redirecting stdout to a file to capture the parser results.
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# Stderr is redirected to the ERR filehandle
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# Must flip to real root to run ssh.
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#
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if ($TESTMODE) {
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    #
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    # In testmode, no ssh. Just run locally.
    #
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    open ERR, "$cmdargs < $infile 2>&1 >> $outfile |";
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}
else {
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    #
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    # In non-testmode, must flip to real root for the ssh, and then flip
    # back afterwards.
    # 
    $EUID = $UID = 0;
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    open ERR, "sshtb -host $CONTROL $cmdargs < $infile 2>&1 >> $outfile |";
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    $EUID = $UID = $SAVEUID;
}

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#
# Now read in the results from stderr and correctly insert the errors
# into the database under the process name of the script called above.
# Also echo the results to the non-captured stderr (SERR).  This is
# needed because parse.proxy may be run on ops, not boss.
#
{
    my $old_env = \%ENV;
    local %ENV;
    copy_hash %ENV, $old_env;

    my @argv = split /\s+/, $cmdargs;
    my $cmd = basename(shift @argv);
    
    tblog_new_process($cmd, @argv);
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    tblog_set_default_cause('user');
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    my $err = '';
    
    # assume any output indicates an error
    while (<ERR>) {
	print SERR $_;
	if (/^\s*\*\*\*\s*(.+)/) {
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	    parse_error($err);
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	    dblog(TBLOG_ERR, {}, $err) if $err; # flush any previous errors
	    $_ = $1;
	    if (/^\S+:\s*$/) { # error on next line
		$_ = <ERR>;
		print SERR $_;
		s/^\s+//;
	    } 
	    s/\s+$//;
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	    parse_error($_);
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	    dblog(TBLOG_ERR, {}, $_) if $_;
	    $err = '';
	} else {
	    $err .= $_;
	}
    }
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    parse_error($err);
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    dblog(TBLOG_ERR, {}, $err) if $err;

    tblog_exit();
}
close ERR;


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if ($?) {
    my $exit_status = $? >> 8;
    
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    tbdie({cause => 'user', type => 'extra', severity => SEV_ERROR,
	   error => ['ns_parse_failed']},
	  "Parsing failed (error code $exit_status)!");
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}
exit(0)
    if ($impotent);

#
# Run the XML converter on the output. 
#
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system("$TB/libexec/xmlconvert -p -x $outfile $pid $eid");
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if ($?) {
    my $exit_status = $? >> 8;
    
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    tbdie({type => 'primary', severity => SEV_ERROR,
	   error => ['xml_converter_failed']},
	  "XML converter exited with error code $exit_status!\n");
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}

#
# Now we have to fix up one minor thing; widearea tunnel IPs. These have
# to be unique, but without the DB to ask, there is no easy way to arrange
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# that.

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my %subnetmap = ();
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my $WANETMASK = "255.255.255.248";
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my $query_result =
    DBQueryFatal("select vname,ips from virt_nodes ".
		 "where pid='$pid' and eid='$eid'");
while (my ($vname,$ips) = $query_result->fetchrow_array()) {
    my @newiplist = ();
    my $newips;

    foreach my $ipinfo (split(" ", $ips)) {
	my ($port,$ip) = split(":", $ipinfo);
	my ($a,$b,$c,$d) = ($ip =~ /(\d+).(\d+).(\d+).(\d+)/);

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	if ($a eq "69" && $b eq "69") {
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	    my $net = inet_ntoa(inet_aton($WANETMASK) & inet_aton($ip));
		
	    if (! defined($subnetmap{$net})) {
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		DBQueryFatal("insert into ipsubnets ".
			     "values ('$pid','$eid', NULL)");
		my ($id) =
		    DBQueryFatal("select LAST_INSERT_ID() ".
				 "from ipsubnets")->fetchrow_array();

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		# We are going to shift the bits up so they do not conflict
		# with the lower part.
		if ($id >= 8192) {
		    die("No more widearea subnets left!\n");
		}
		$id = $id << 3;

		my $cc = ($id & 0xff00) >> 8;
		my $dd = ($id & 0xf8);
		$subnetmap{$net} = inet_aton("192.168.$cc.$dd");
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	    }
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	    my $newsubnet = inet_ntoa($subnetmap{$net} | inet_aton("$d"));
	    push(@newiplist, "$port:${newsubnet}");
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	}
	else {
	    push(@newiplist, $ipinfo);
	}
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    }
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    $newips = join(" ", @newiplist);
    
    if ($newips ne $ips) {
	DBQueryFatal("update virt_nodes set ips='$newips' ".
		     "where vname='$vname' and pid='$pid' and eid='$eid'");
    }
}
#
# So, if we ended up changing any, we have look for corresponding entries
# in virt_trafgens, and fix them too.
#
if (keys(%subnetmap)) {
    $query_result =
	DBQueryFatal("select vnode,vname,ip,target_ip from virt_trafgens ".
		     "where pid='$pid' and eid='$eid'");
    while (my ($vnode,$vname,$ip,$dstip) = $query_result->fetchrow_array()) {
	my ($a,$b,$c,$d) = ($ip =~ /(\d+).(\d+).(\d+).(\d+)/);
	my $newip        = $ip;
	my $newdstip     = $dstip;
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	my $net		 = inet_ntoa(inet_aton($WANETMASK) & inet_aton($ip));
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	if (defined($subnetmap{$net})) {
	    $newip = inet_ntoa($subnetmap{$net} | inet_aton("$d"));
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	}
	($a,$b,$c,$d) = ($dstip =~ /(\d+).(\d+).(\d+).(\d+)/);
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	$net          = inet_ntoa(inet_aton($WANETMASK) & inet_aton($dstip));
	if (defined($subnetmap{$net})) {
	    $newdstip = inet_ntoa($subnetmap{$net} | inet_aton("$d"));
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	}
	if ($ip ne $newip || $dstip ne $newdstip) {
	    DBQueryFatal("update virt_trafgens set ".
			 "       ip='$newip',target_ip='$newdstip' ".
			 "where pid='$pid' and eid='$eid' and ".
			 "      vnode='$vnode' and vname='$vname'");
	}
    }
}
exit(0);


#
# Open up a TCL file and write a bunch of TCL to it!
#
sub GenDefsFile($)
{
    my($fname) = $_[0];

    open(TCL, "> $fname")
	or die("Could not open TCL defs file for writing: $!\n");

    print TCL "namespace eval TBCOMPAT {\n";

    print TCL "# Event Object Types\n";
    my $query_result =
	DBQueryFatal("select idx,type from event_objecttypes");
    while (my ($idx,$type) = $query_result->fetchrow_array()) {
	print TCL "set objtypes($type) $idx\n";
    }
    print TCL "\n";

    print TCL "# Event Event Types\n";
    $query_result =
	DBQueryFatal("select idx,type from event_eventtypes");
    while (my ($idx,$type) = $query_result->fetchrow_array()) {
	print TCL "set eventtypes($type) $idx\n";
    }
    print TCL "\n";
    
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    print TCL "# Node Types and Classes\n";
    my @alltypes = NodeType->AllTypes();
    foreach my $typeinfo (@alltypes) {
	my $type   = $typeinfo->type();
	my $class  = $typeinfo->class();
	my $isrem  = $typeinfo->isremotenode();
	my $isvirt = $typeinfo->isvirtnode();
	my $issub  = $typeinfo->issubnode();
	my $osid   = $typeinfo->default_osid();

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	print TCL "set hwtypes($type) 1\n";
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	print TCL "set hwtype_class($type) $class\n";
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	print TCL "set isremote($type) $isrem\n";
	print TCL "set isvirt($type) $isvirt\n";
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	print TCL "set issubnode($type) $issub\n";

	# Since there are multiple types per class, this is probably not
	# the right thing to do.
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	print TCL "set hwtypes($class) 1\n";
	print TCL "set isremote($class) $isrem\n";
	print TCL "set isvirt($class) $isvirt\n";
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	print TCL "set issubnode($class) $issub\n";

	if (defined($osid) && $osid ne "") {
	    $query_result =
		DBQueryFatal("select osname from os_info ".
			     "where osid='$osid'");
	    if ($query_result->numrows) {
		my ($osname) = $query_result->fetchrow_array();

		if ($osname) {
		    print TCL "set default_osids($type) \"$osname\"\n"
		}
	    }
	}
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    }
    print TCL "\n";
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    print TCL "# Node Aux Types\n";
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    my @auxtypes = NodeType->AuxTypes();
    foreach my $typeinfo (@auxtypes) {
	my $type   = $typeinfo->type();
	my $isrem  = $typeinfo->isremotenode();
	my $isvirt = $typeinfo->isvirtnode();
	my $issub  = $typeinfo->issubnode();
	my $osid   = $typeinfo->default_osid();

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	print TCL "set hwtypes($type) 1\n";
	print TCL "set isremote($type) $isrem\n";
	print TCL "set isvirt($type) $isvirt\n";
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	print TCL "set issubnode($type) $issub\n";

	if (defined($osid) && $osid ne "") {
	    $query_result =
		DBQueryFatal("select osname from os_info ".
			     "where osid='$osid'");
	    if ($query_result->numrows) {
		my ($osname) = $query_result->fetchrow_array();

		if ($osname) {
		    print TCL "set default_osids($type) \"$osname\"\n"
		}
	    }
	}
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    }
    print TCL "\n";
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    print TCL "# Global Vtypes\n";
    $query_result = 
        DBQueryFatal("select vtype, weight, types ".
                     " from global_vtypes");
    while (my ($vtype, $weight, $types) = $query_result->fetchrow_array()) {
        print TCL "set ::GLOBALS::vtypes($vtype) [Vtype $vtype $weight {$types}]\n";
    }
    print TCL "\n";

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    print TCL "# Node Permissions\n";
    my %nodeperms = ();
    $query_result =
	DBQueryFatal("select type,pid from nodetypeXpid_permissions");
    while (my ($type,$pid) = $query_result->fetchrow_array()) {
	if (! defined($nodeperms{$type})) {
	    $nodeperms{$type} = [];
	}
	push(@{$nodeperms{$type}}, $pid);
    }
    foreach my $type (keys(%nodeperms)) {
	my @pids = @{$nodeperms{$type}};

	print TCL "set nodetypeXpid_permissions($type) [list @pids]\n";
    }
    print TCL "\n";

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    print TCL "# Robot areas\n";
    $query_result =
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	DBQueryFatal("select distinct building from node_startloc");
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    while (my ($building,$floor) = $query_result->fetchrow_array()) {
	print TCL "set areas($building) 1\n";
    }
    print TCL "\n";

    print TCL "# Obstacles\n";
    $query_result = DBQueryFatal(
	"select o.obstacle_id,o.building,o.x1,o.x2,o.y1,o.y2,o.description, ".
	" fi.pixels_per_meter ".
	"from obstacles as o ".
	"left join floorimages as fi on fi.building=o.building");
    while (my ($id,$building,$x1,$x2,$y1,$y2,$description,$ppm) = 
	   $query_result->fetchrow_array()) {
	print TCL "set obstacles($id,$building,x1) " . $x1 / $ppm . "\n";
	print TCL "set obstacles($id,$building,x2) " . $x2 / $ppm . "\n";
	print TCL "set obstacles($id,$building,y1) " . $y1 / $ppm . "\n";
	print TCL "set obstacles($id,$building,y2) " . $y2 / $ppm . "\n";
	print TCL "set obstacles($id,$building,description) {$description}\n";
    }
    print TCL "\n";

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    print TCL "# Cameras\n";
    $query_result = DBQueryFatal(
	"select name,building,loc_x,loc_y,width,height from cameras");
    while (my ($name,$building,$loc_x,$loc_y,$width,$height) = 
	   $query_result->fetchrow_array()) {
	print TCL "set cameras($name,$building,x) $loc_x\n";
	print TCL "set cameras($name,$building,y) $loc_y\n";
	print TCL "set cameras($name,$building,width) $width\n";
	print TCL "set cameras($name,$building,height) $height\n";
    }
    print TCL "\n";

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    if (defined($pid)) {
	print TCL "# OSIDs\n";
	$query_result =
	    DBQueryFatal("select osname from os_info ".
			 "where shared=1 or pid='$pid'");
		     
	while (my ($osname) = $query_result->fetchrow_array()) {
	    print TCL "set osids($osname) 1\n";
	}
	print TCL "\n";
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    }

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    if (defined($pid)) {
	# Load reserved nodes, for swapmodify.
	$query_result = 
	    DBQueryFatal("select r.vname,r.node_id,n.type from reserved as r ".
			 "left join nodes as n on n.node_id=r.node_id ".
			 "where r.pid='$pid' and r.eid='$eid'");

	print TCL "# Reserved Nodes\n";
	while (($vname,$reserved,$type) = $query_result->fetchrow_array()) {
	    print TCL "lappend reserved_list \"$vname\"\n";
	    print TCL "set reserved_type($vname) \"$type\"\n";
	    print TCL "set reserved_node($vname) \"$reserved\"\n";
	}
    }

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    print TCL "# Physical Node Names\n";
    $query_result =
	DBQueryFatal("select n.node_id,nt.type from nodes as n ".
		     "left join node_types as nt on n.type=nt.type ".
		     "where n.node_id=n.phys_nodeid and nt.isremotenode=0 ".
		     "and n.role='testnode' and nt.type!='dnard'");

    while (($node_id,$type) = $query_result->fetchrow_array()) {
	print TCL "set physnodes($node_id) \"$type\"\n";
    }

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    print TCL "# Location info\n";
    $query_result =
	DBQueryFatal("select li.node_id,li.building,li.loc_x,li.loc_y,".
		     "li.loc_z,fi.pixels_per_meter ".
		     "from location_info as li ".
		     "left join floorimages as fi on fi.building=li.building");

    while (my ($node_id,$building,$loc_x,$loc_y,$loc_z,$ppm) =
	   $query_result->fetchrow_array()) {
	print TCL "set location_info($node_id,$building,x) ". 
	    $loc_x / $ppm ."\n";
	print TCL "set location_info($node_id,$building,y) ". 
	    $loc_y / $ppm ."\n";
	if (!defined($loc_z)) {
	    $loc_z = 0.0;
	}
	print TCL "set location_info($node_id,$building,z) ". 
	    $loc_z / $ppm ."\n";
    }

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    #
    # ElabInElab stuff.
    # 
    my $maxnodes   = 0;
    if (defined($pid)) {
	my $elabinelab = 0;
	my $elabinelab_eid;

	TBExptIsElabInElab($pid, $eid, \$elabinelab, \$elabinelab_eid)
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	    or tbdie("Failed to get ElabInElab attributes!");
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	if ($elabinelab && defined($elabinelab_eid)) {
	    if (! TBExptMinMaxNodes($pid, $elabinelab_eid, undef, \$maxnodes)) {
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		tbdie("Could not get max nodes from DB!");
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	    }
	}
    }
    # Be sure to initialize this to something ...
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    print TCL "set elabinelab_maxpcs $maxnodes\n\n";

    #
    # For Templates.
    #
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    if (defined($pid)) {
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	$query_result =
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	    DBQueryFatal("select instance_idx from experiments ".
			 "where pid='$pid' and eid='$eid'");
	my ($instance_idx) = $query_result->fetchrow_array();
	if ($instance_idx) {
	    print TCL "# Template goo\n";
	
	    $query_result =
		DBQueryFatal("select * from experiment_template_instance_bindings ".
			     "where instance_idx='$instance_idx'");
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	    while (my %row = $query_result->fetchhash()) {
		my $name  = $row{'name'};
		my $value = $row{'value'};
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		print TCL "set parameter_list_defaults($name) \"$value\"\n";
	    }
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	}
    }
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    print TCL "}\n";
    close(TCL);
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}
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sub parse_error($) {
    my ($mesg) = @_;

    return if parse_invalid_os_error($mesg);
    return if parse_invalid_variable_error($mesg);

    return;
}

sub parse_invalid_os_error($) {
    my ($mesg) = @_;
    my ($type, $osname);

    if ($mesg =~ /^\[tb-set-(\w+)-os\] Invalid osid (\S+)\.$/) {
	($type, $osname) = ($1, $2);
    } else {
	return false;
    }

    tbreport(SEV_ADDITIONAL, {script => 'parse.tcl'}, 'invalid_os',
	     $type, $osname, undef);

    return true;
}

sub parse_invalid_variable_error($) {
    my ($mesg) = @_;
    my ($type, $var);

    if ($mesg =~ /^\[tb-set-hardware\] Invalid hardware type (\S+)\.$/) {
	$var  = $1;
	$type = 'hardware_type';
    } elsif ($mesg =~ /^\[run\] Invalid lan\/link name (\S+)\./) {
	$var  = $1;
	$type = 'lan_link_name';
    } elsif ($mesg =~ /^\[run\] Invalid node name (\S+)\./) {
	$var  = $1;
	$type = 'node_name';
    } else {
	return false;
    }

    tbreport(SEV_ADDITIONAL, {script => 'parse.tcl'}, 'invalid_variable',
	     $type, $var);

    return true;
}