staticroutes.in 21 KB
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#!/usr/bin/perl -w
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#
# EMULAB-COPYRIGHT
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# Copyright (c) 2000-2011 University of Utah and the Flux Group.
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# All rights reserved.
#

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use English;
use Getopt::Std;
use Socket;
use IO::Handle;     # thousands of lines just for autoflush :-(

#
# usage: staticroutes <pid> <eid>
#
sub usage()
{
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    print("Usage: staticroutes [-n [-s|-l|-b]] [-d] [-m] [-f] [-t] <pid> <eid>".
	  "\n".
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	  "       Use -n to print routes, but leave the DB alone.\n".
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	  "       Use -s (with -n) to print routes in NS format.\n".
	  "       Use -b (with -n) to print routes in Freebsd format.\n".
	  "       Use -l (with -n) to print routes in Linux format.\n".
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	  "       Use -d to turn on debugging output.\n".
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	  "       Use -m to turn on memory debugging output with top.\n".
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	  "       Use -t to optimize network routes.\n".
	  "       Use -f to force route calculation; ignore 'static' flag.\n");
    exit(-1);
}
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my  $optlist = "dnftslbmj";
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#
# Configure variables
#
my $TB		= "@prefix@";
my $NETMASK	= "255.255.255.0";
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my $EXPTNETMASK = "255.255.0.0";
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my $debug       = 1;
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my $memdebug    = 0;
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my $routecalc   = "$TB/libexec/routecalc";
my $impotent    = 0;
my $force	= 0;
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my $optimize    = 1;
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my $edgeoptimize= 0; # Turned off till netmask problem can be fixed
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my $format      = "";
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#
# Testbed Support libraries
#
use lib "@prefix@/lib";
use libdb;
use libtestbed;
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use libtblog;
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# un-taint path
$ENV{'PATH'} = '/bin:/usr/bin:/usr/local/bin';
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};

#
# Turn off line buffering on output
#
$| = 1; 

#
# Parse command arguments. Once we return from getopts, all that should be
# left are the required arguments.
#
%options = ();
if (! getopts($optlist, \%options)) {
    usage();
}
if (@ARGV != 2) {
    usage();
}
if (defined($options{"d"})) {
    $debug = 1;
}
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if (defined($options{"m"})) {
    $memdebug = 1;
}
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if (defined($options{"n"})) {
    $impotent = 1;
}
if (defined($options{"f"})) {
    $force = 1;
}
if (defined($options{"t"})) {
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    $optimize = 0;
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}
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if (defined($options{"s"})) {
    $format = "ns";
}
if (defined($options{"b"})) {
    $format = "bsd";
}
if (defined($options{"l"})) {
    $format = "suxs";
}
if ($format && !$impotent) {
    usage();
}
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my $pid = $ARGV[0];
my $eid = $ARGV[1];

#
# Untaint args.
#
if ($pid =~ /^([-\@\w]+)$/) {
    $pid = $1;
}
else {
    die("Bad data in pid: $pid.");
}
if ($eid =~ /^([-\@\w]+)$/) {
    $eid = $1;
}
else {
    die("Bad data in eid: $eid.");
}

#
# Get the list of nodes.
# 
my $query_result =
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    DBQueryFatal("select vname,ips,routertype,role from virt_nodes ".
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		 "where pid='$pid' and eid='$eid'");

if (!$query_result->numrows) {
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    tbwarn("No nodes in experiment $pid/$eid!");
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    exit(0);
}
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# Need to do this when we want to seek around inside the results.
$query_result = $query_result->WrapForSeek();
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my $exptidx;
if (!TBExptIDX($pid, $eid, \$exptidx)) {
    die("*** $0:\n".
	"    No such experiment $pid/$eid!");
}

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# A map of ips for each node, indexed by vname:port. 
my %ips      = ();

# A map (and reverse map) of node (vname) to unique index.
my %map      = ();
my %rmap     = ();
my $index    = 0;

# A map of lans, where each is a list of the members, indexed by lan.
my %lans     = ();

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# A reverse map (sorta). Map a pair of links back to the lan they belong to.
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my %rlans    = ();

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# The costs, indexed by lan. This is kinda bogus, but since the cost
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# is the same for each member of a lan, no big deal.
my %costs    = ();

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# Ditto for masks. Need to combine all this to save space.
my %masks    = ();

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# Number of links per node, indexed by node (vname). This is strictly
# for generating NS style output. When there is more than one link on
# a node, we *must* generate net routes instead of host routes, or the
# parser will be unhappy.
my %linkcount= ();

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# list of ports that a node is connected on. Indexed by node.
my %nodeportlist = ();
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# Map vname:port (member) to the lan its in. 
my %nodeport2lan = ();
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#
# Look to see if any nodes want static routing. We create static routes
# if any node specifies static-old, or if any node specifies static and
# the number of nodes is less then 250. More then 250 nodes, the user has
# to be using a current image that supports ddijk, and so do not want to
# clog the DB with a zillion routes. 
#
my $staticO = 0;
my $staticN = 0;

if (!$force) {
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    while (my (undef,undef,$routertype,$role) =
	   $query_result->fetchrow_array()) {
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	if ($routertype eq "static-old") {
	    $staticO++;
	}
	elsif ($routertype eq "static") {
	    $staticN++;
	}
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	if ($role eq "bridge") {
	    # Need to figure this out.
	    exit(0);
	}
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    }

    # No static routing of any kind.
    exit(0)
	if (! ($staticO || $staticN));

    if ($staticN > 250) {
	warn("*** $0:\n".
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	     "    WARNING: More than 250 nodes; ".
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	     "refusing to use centralized static routes!\n".
	     "    You must use an image that supports distributed static ".
	     "route calculation.\n");
	exit(0);
    }
    $query_result->dataseek(0);
}

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#
# Convert list of nodes into a map of $vname:$port to IP. We will need the
# IPs later when filling in the virt_routes table.
# 
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while (my ($vname,$ips,undef) = $query_result->fetchrow_array) {
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    $linkcount{$vname} = 0;
    
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    if (! defined($nodeportlist{$vname}) ) {
      $nodeportlist{$vname} = [];
    }
    
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    if (! defined($map{$vname})) {
	$map{$vname}  = $index;
	$rmap{$index} = $vname;
	$index++;
    }
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    foreach my $ipinfo (split(" ", $ips)) {
	my ($port,$ip) = split(":", $ipinfo);
	$ips{"$vname:$port"} = $ip;
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	push( @{$nodeportlist{$vname}}, $port );
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	$linkcount{$vname} += 1;
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    }
}

#
# Now get the lans. 
#
$query_result =
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    DBQueryFatal("select vname,member,cost,mask " .
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		 "from virt_lans where pid='$pid' and eid='$eid'");
if (!$query_result->numrows) {
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    tbwarn("No links or lans in experiment $pid/$eid!");
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    exit(0);
}

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while (my ($vname,$member,$cost,$mask) = $query_result->fetchrow_array) {
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    if (! defined($lans{$vname})) {
	$lans{$vname} = [];
    }
    push(@{$lans{$vname}},$member);
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    $nodeport2lan{$member} = $vname;
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    $costs{$vname} = $cost;
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    $masks{$vname} = $mask;
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}

#
# We use perl IPC goo to create a child we can both write to and read from
# (normal perl I/O provides just unidirectional I/O to a process).
# 
if (! socketpair(CHILD, PARENT, AF_UNIX, SOCK_STREAM, PF_UNSPEC)) {
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    tbdie("socketpair failed: $!");
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}

CHILD->autoflush(1);
PARENT->autoflush(1);

my $childpid = fork();
if (! $childpid) {
    close CHILD;

    #
    # Dup our descriptors to the parent, and exec the program.
    # The parent then talks to it read/write.
    #
    open(STDIN,  "<&PARENT") || die "Can't redirect stdin";
    open(STDOUT, ">&PARENT") || die "Can't redirect stdout";
    open(STDERR, ">&PARENT") || die "Can't redirect stderr";

    exec($routecalc);
    die("*** $0:\n".
	"    exec $routecalc failed: $!\n");
}
close PARENT;

#
# Okay, now send adjacency info for all the nodes on each lan to the child.
#
foreach my $lan (keys(%lans)) {
    my @members = @{$lans{$lan}};

    foreach my $member1 (@members) {
	foreach my $member2 (@members) {
	    if ($member1 ne $member2) {
		my ($node1,$port1) = split(":", $member1);
		my ($node2,$port2) = split(":", $member2);
		my $id1 = $map{$node1};
		my $id2 = $map{$node2};

		# Reverse mapping for later. 
		$rlans{"$node1:$node2"} = $lan;

		if ($debug) {
		    print STDERR "$member1($id1) $member2($id2)\n";
		}

		print CHILD "i $id1 $id2 $costs{$lan}\n";
	    }
	}
    }
}

#
# Parse the routes. Need to map the indices back to nodes, and then form a
# matrix. Why, well you will see in a bit ...
#
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my @routes	= ();
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my %netroutes   = ();

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#
# Stores routes that will make it to the DB. Hash is per source node and
# contains an array of routes for each node. This allows for some
# optimizations in a final pass
#
my @dbroutes = ();

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#
# Host route ips for interfaces of a dst node besides the nearest one
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# This is indexed by a node (i.e. a "src:srcip-dst:dstip" node) and gives
# of hop:hopips. 
my @hostroutes = ();
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if ( $memdebug ) {
    my $top =`top -n`;
    print STDERR "top output before reading routes\n$top\n";
}
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# Tell the child to print the routes.
print CHILD "C\n";

#
# Read back the results from the child.
#
while (<CHILD>) {
    if ($debug) {
	print "$_";
    }
    
    my ($src, $dst, $hop);
    
    if ( /route (\d+) to (\d+) via (\d+)/ ) {
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	$src = $rmap{$1};
	$dst = $rmap{$2};
	$hop = $rmap{$3};
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	if ($debug) {
	    print "src:$src dst:$dst hop:$hop\n";
	}
	$routes[($1 * $index) + $2] = int($3);
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    }
    else {
	die("*** $0:\n".
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	    "    $routecalc returned a bad line: '$_'\n");
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    }
}

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# Tell the child to quit. Then wait for it.
print CHILD "q\n";
waitpid($childpid, 0);
if ($?) {
    die("*** $0:\n".
	"    $routecalc failed with status: $?\n");
}

close(CHILD);

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#
# Clean the routes.
#
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if (! $impotent) {
    DBQueryFatal("delete from virt_routes where ".
		 "pid='$pid' and eid='$eid'");
}
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if( $memdebug ) {
    $top =`top -n`;
    print STDERR "top output after reading routes\n$top\n";
}

sub type2bin($) {
    my ($type) = @_;
    if ($type eq "net") {
	return 0;
    } elsif ($type eq "host") {
	return 1;
    }
    die("*** $0:\n".
	"    type2bin passed invalid type: $type\n");
}

sub bin2type($) {
    my ($bin) = @_;
    if ($bin == 0) {
	return "net";
    } elsif ($bin == 1) {
	return "host";
    }
    die("*** $0:\n".
	"    bin2type passed invalid bintype: $bin\n");
}

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#
# Now it gets fun. We have to go through each src:dst pair in the route
# list. The problem is that the dst could be multihomed and multiple hops
# away, and so we have no idea what interface (IP) we are actually routing
# to. We have to know the IP, or else we won't be able to insert the route!
# So, we use the matrix to recurse through and find our way to the
# destination. When we get to the last hop, we can use the src:dst of that
# last hop to index into rlans, which gives the full lanlink list. Then we
# search that to find the IP.
#
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for( my $srcid = 0 ; $srcid < $index ; $srcid++ ) {
    for( my $dstid = 0 ; $dstid < $index ; $dstid++ ) {
	my $i = ($srcid * $index) + $dstid;
	if ( ! defined($routes[$i]) ) {
	    next;
	}

	my $src = $rmap{$srcid};
	my $dst = $rmap{$dstid};
	my $hopid = $routes[$i];
	my $hop = $rmap{$hopid};
	my $type = 'host';
	my $directlyconn = 0;
	my $netroutedefined = 0;
	my ($srcip,$dstip,$hopip);
	my ($srcipbin,$dstipbin,$hopipbin);
	
	# remember the port for which we have dstip
	my $dstport;
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	#
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	# In the case of printing NS format, we don't need to print routes
	# for different interfaces since NS supports only a single node
	# address. Also routes for directly connected neighbors in NS
	# is necessary.
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	#
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	if ($impotent && $format eq "ns") {
	    print "\$$src add-route \$$dst \$$hop\n";
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	}
	
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	#
	# This is the lan that contains the src and hop. (the link). 
	#
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	my $srclan  = $rlans{"$src:$hop"};
	my $srcmask = $masks{$srclan};
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	#
	# This is the lan that contains the node one hop before dst and dst
	# 
	my $dstlan;
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	my $dstmask;
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	#
	# Members in the srclan and dstlan respectively
	#
	my @srcmembers;
	my @dstmembers;
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	#
	# If directly connected, skip adding the route into the DB
	# However, we still need to add a route for other interfaces
	# of the directly connected node
	if ($dst eq $hop) {
	    $directlyconn = 1;
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	    $dstlan  = $rlans{"$src:$dst"};
	    $dstmask = $masks{$dstlan};
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	    @dstmembers = @{$lans{$dstlan}};
	    @srcmembers = @{$lans{$srclan}};
	    #
	    # Scan dstmembers till we find the dst. This is the IP we want.
	    #
	    foreach my $member (@dstmembers) {
		my ($node,$port) = split(":", $member);
		
		if ($node eq $dst) {
		    $dstport = $port;
		    last;
		}
	    }
	    
	    #
	    # goto HOSTROUTES;
	    # Removed the above goto since using it with the for loop
	    # tickles a perl bug. Look at 
	    # http://archive.develooper.com/perl5-porters@perl.org/msg97631.html
	    # for details
	    #
	} else {
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	    #
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	    # Now we need to find the destination lan (link) by
	    # stepping through each hop till we get to it.
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	    #
	    my $nhop = $hop;
	    while (1) {
		# Next hop to destination.
		my $j = ($map{$nhop} * $index) + $map{$dst};
		if (!defined($routes[$j])) {
		    die("*** $0:\n".
			"    Failed to find route: $nhop:$dst!\n");
		}
		my $nnhop = $rmap{$routes[$j]};
		
		# Last hop to destination.
		if ($nnhop eq $dst) {
		    last;
		}
		$nhop = $nnhop;
	    }
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	    $dstlan  = $rlans{"$nhop:$dst"};
	    $dstmask = $masks{$dstlan};
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	    if ($debug) {
		print "$src --> $dst : $nhop:$dst\n";
	    }
	    
	    #
	    # The members of the lan are used to map back to the IPs of the
	    # interfaces (since we need IPs to insert route entries).
	    #
	    @srcmembers = @{$lans{$srclan}};
	    @dstmembers = @{$lans{$dstlan}};
	    
	    #
	    # Scan dstmembers till we find the dst. This is the IP we want.
	    #
	    foreach my $member (@dstmembers) {
		my ($node,$port) = split(":", $member);
		
		if ($node eq $dst) {
		    $dstip = $ips{$member};
		    $dstipbin = inet_aton($dstip);
		    $dstport = $port;
		    last;
		}
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	    }
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	    #
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	    # If optimzing create a net route and avoid a per-host
	    # entry for each pair. Convert the route, but remember we
	    # did it so we can skip similar routes in the future.
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	    #
	    if ($optimize) {
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		my $newip = inet_ntoa(inet_aton($dstip) & inet_aton($dstmask));
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		if (defined($netroutes{"$src:$newip"})) {
		    if ($netroutes{"$src:$newip"} ne $hop) {
			die("*** $0:\n".
			    "    network route mismatch: $src:$dst:$hop!\n");
		    }
		    $netroutedefined = 1;
		} else {
		    $netroutes{"$src:$newip"} = $hop;
		    $type  = "net";
		    $dstip = $newip;
		    $dstipbin = inet_aton($dstip);
		}
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	    }
	}
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	#
	# Scan srcmembers to find the IPs for the src and hop.
	#
	foreach my $member (@srcmembers) {
	    my ($node,$port) = split(":", $member);
	    
	    if ($node eq $src) {
		$srcip   = $ips{$member};
		$srcipbin = inet_aton($srcip);
		next;
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	    }
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	    if ($node eq $hop) {
		$hopip = $ips{$member};
		$hopipbin = inet_aton($hopip);
		next;
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	    }
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	}
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	# Construct host routes for the other interfaces of dst
	foreach my $port (@{$nodeportlist{$dst}}) {
	    
	    # We already have a route for the ip on dstport
	    if ( $port eq $dstport ) {
		next;
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	    }
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	    my $newip   = $ips{"$dst:$port"};
	    my $newmask = $masks{$nodeport2lan{"$dst:$port"}};
	    
	    my $newipsubnet = inet_ntoa(inet_aton($newip) &
					inet_aton($newmask));
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	    # If we already have a route to newipsubnet via the same hop,
	    # we don't need the host route
	    if ( defined($netroutes{"$src:$newipsubnet"}) &&
		 $netroutes{"$src:$newipsubnet"} eq $hop ) {
		next;
	    } else {
		if ( ! defined($hostroutes[$srcid]) ) {
		    $hostroutes[$srcid] = [];
		}
		my $newipbin = inet_aton($newip);
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		push( @{$hostroutes[$srcid]}, 
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		      pack( "a4Ia4a4Ia4", $srcipbin, $dstid,
			    inet_aton($newmask),
			    $newipbin, $hopid, $hopipbin) );
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	    }
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	}
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	# We had to run till here to store hostroutes
	# that may have to be added later. However,
	# we can skip for directly connected neighbors
	# or if net route was already defined
	if ($directlyconn || $netroutedefined) {
	    next;
	}
	
	if ( !defined($dbroutes[$srcid]) ) {
	    $dbroutes[$srcid] = [];
	}
	push( @{$dbroutes[$srcid]}, 
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	      pack( "a4Ia4a4Ia4s", $srcipbin, $dstid,
		    inet_aton($dstmask), $dstipbin, $hopid,
		    $hopipbin, type2bin($type)) );
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    }
}

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# release memory used by the routes hash
@routes = ();
undef @routes;

if( $memdebug ) {
    $top =`top -n`;
    print STDERR "top output after finding net routes\n$top\n";
}

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# This part adds host routes for subnets that don't have a route.
# However, the first route will be added as a net route
# and if subsequent host routes are different from the first
# route we added, only then will the host routes get added.
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for( my $srcid = 0 ; $srcid < $index ; $srcid++ ) {
    if (! defined($hostroutes[$srcid]) ) {
	next;
    }
    my $src = $rmap{$srcid};
    foreach my $hostroute (@{$hostroutes[$srcid]}) {
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	my ($srcipbin, $dstid, $dstmaskbin, $dstipbin, $hopid, $hopipbin) =
	    unpack( "a4Ia4a4Ia4", $hostroute );
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	my $dstip;
	my $dst = $rmap{$dstid};
	my $hop = $rmap{$hopid};
	my $type = 'host';
	
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	my $dstipsubnet = inet_ntoa($dstipbin & $dstmaskbin);
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	# If we already have a net route to dstipsubnet via the same hop,
	# we don't need the host route
	if ( defined($netroutes{"$src:$dstipsubnet"}) ) {
	    if ($netroutes{"$src:$dstipsubnet"} eq $hop ) {
		next;
	    }
	} else {
	    
	    # We do the following optimization only for
	    # hosts that are _not_ directly connected
	    # neighbors. Otherwise, adding interface 
	    # subnet routes fail. Even with this, certain
	    # redundant links might be unused since the
	    # route calculator will choose one of
	    # the redundant routes over the other(s)
	    if ($optimize && ($dst ne $hop)) {
		$netroutes{"$src:$dstipsubnet"} = $hop;
		$type = "net";
		$dstip = $dstipsubnet;
		$dstipbin = inet_aton($dstip);
	    }
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	}
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	if ( !defined($dbroutes[$srcid]) ) {
	    $dbroutes[$srcid] = [];
698
	}
699
	push( @{$dbroutes[$srcid]}, 
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	      pack( "a4Ia4a4Ia4s", $srcipbin, $dstid, $dstmaskbin,
		    $dstipbin, $hopid, $hopipbin, type2bin($type)) );
702
    }
703 704 705 706 707 708 709 710 711 712 713 714
}

# release memory used by all these hashes.
# Not much use doing this at this stage though
%netroutes = ();
undef %netroutes;
@hostroutes = ();
undef @hostroutes;
%lans = ();
undef %lans;
%rlans = ();
undef %rlans;
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%nodeport2lan = ();
undef %nodeport2lan;
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if( $memdebug ) {
    $top =`top -n`;
    print STDERR "top output before final pass\n$top\n";
}

# In the final pass, for some source nodes that are "edge" 
# nodes (i.e. with degree 1), we can replace all routes with
# one route with a smaller IP prefix since the nexthop is
# the same for all routes
for( my $srcid = 0 ; $srcid < $index ; $srcid++ ) {
    if ( ! defined($dbroutes[$srcid]) ) {	
	next;
    }
    my $src = $rmap{$srcid};
    my ($dst, $hop);
    my ($srcip, $dstip, $hopip, $type, $prevhopip, $prevdstip);
    my ($srcipbin, $dstid, $dstipbin, $hopid, $hopipbin, $typebin);
    my ($prevdstipprefix, $dstipprefix);
    my $oneroute = 0;
    $prevhopip = $prevdstip = 0;
    $prevdstipprefix = $dstipprefix = 0;
    if ( $optimize && $edgeoptimize ) {
	$oneroute = 1;
	foreach my $route (@{$dbroutes[$srcid]}) {
742 743 744
	    ($srcipbin, $dstid, $dstmaskbin, $dstipbin, $hopid, $hopipbin,
	     $typebin) =
		 unpack( "a4Ia4a4Ia4s", $route);
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775
	    $srcip = inet_ntoa($srcipbin);
	    $dst = $rmap{$dstid};
	    $dstip = inet_ntoa($dstipbin);
	    $hop = $rmap{$hopid};
	    $hopip = inet_ntoa($hopipbin);
	    $type = bin2type($typebin);
	    if (! $prevhopip || ! $prevdstip) {
		$prevhopip = $hopip;
		$prevdstip = $dstip;
	    } else {
		# This can happen when a node has a degree > 1
		if ($prevhopip ne $hopip) {
		    $oneroute = 0;
		    last;
		}
		
		# This can happen if we have both widearea nodes
		# and local nodes in an experiment. In that case,
		# the widearea nodes all have 10.* addresses while
		# the local ones have 192.168.* 
		$prevdstipprefix = 
		    inet_ntoa(inet_aton($prevdstip) & inet_aton($EXPTNETMASK));
		$dstipprefix = 
		    inet_ntoa(inet_aton($dstip) & inet_aton($EXPTNETMASK));
		if ($dstipprefix ne $prevdstipprefix) {
		    $oneroute = 0;
		    last;
		}
		$prevhopip = $hopip;
		$prevdstip = $dstip;
	    }
776
	}
777 778 779 780 781 782 783
    }
    if( $optimize && $edgeoptimize && $oneroute ) {
	if ($impotent) {
	    if ($debug) {
		printf(STDERR "%s: %-23s --> %-23s - %s\n",
		       ($type eq "net" ? "n" : "h"),
		       "$src:$srcip", "ANY:$dstipprefix", "$hop:$hopip");
784
	    }
785 786
	    if ($format eq "bsd") {
		print "route add -net $dstipprefix $hopip $EXPTNETMASK\n";
787
	    }
788 789
	    elsif ($format eq "suxs") {
		print "route add -net $dstipprefix netmask $EXPTNETMASK gw $hopip\n";
790
	    }
791 792
	} else {
	    DBQueryFatal("insert into virt_routes ".
793 794 795 796
			 " (exptidx,pid,eid,vname,src,dst,nexthop,dst_type, ".
			 "  dst_mask) ".
			 " values ('$exptidx', '$pid', '$eid', '$src', ".
			 "         '$srcip', '$dstipprefix', ".
797 798 799 800
			 "         '$hopip', 'net', '$EXPTNETMASK')");		
	}
    } else {
	foreach my $route (@{$dbroutes[$srcid]}) {
801 802 803
	    ($srcipbin, $dstid, $dstmaskbin, $dstipbin, $hopid, $hopipbin,
	     $typebin) =
		unpack( "a4Ia4a4Ia4s", $route);
804 805 806 807 808 809
	    $srcip = inet_ntoa($srcipbin);
	    $dst = $rmap{$dstid};
	    $dstip = inet_ntoa($dstipbin);
	    $hop = $rmap{$hopid};
	    $hopip = inet_ntoa($hopipbin);
	    $type = bin2type($typebin);
810
	    $mask = inet_ntoa($dstmaskbin);
811 812 813 814 815 816 817 818 819 820 821 822

	    if ($impotent) {
		if ($debug) {
		    printf(STDERR "%s: %-23s --> %-23s - %s\n",
			   ($type eq "net" ? "n" : "h"),
			   "$src:$srcip", "$dst:$dstip", "$hop:$hopip");
		}
		if ($format eq "bsd") {
		    if ($type eq "host") {
			print "route add -host $dstip $hopip\n";
		    }
		    else {
823
			print "route add -net $dstip $hopip $mask\n";
824 825 826 827 828 829 830
		    }
		}
		elsif ($format eq "suxs") {
		    if ($type eq "host") {
			print "route add -host $dstip gw $hopip\n";
		    }
		    else {
831 832
			print "route add -net $dstip netmask ".
			    "$mask gw $hopip\n";
833 834 835 836
		    }
		}
	    } else {
		DBQueryFatal("insert into virt_routes ".
837 838 839 840
			     " (exptidx,pid,eid,vname,src,dst,nexthop,".
			     "  dst_type,dst_mask) ".
			     " values ('$exptidx', ".
			     "         '$pid', '$eid', '$src', '$srcip', ".
841
			     "         '$dstip', '$hopip', '$type', '$mask')");
842 843 844
	    }
	}
    }
845 846
}

847 848 849 850
if( $memdebug ) {
    $top =`top -n`;
    print STDERR "top output just before exit\n$top\n";
}
851

852
exit 0;