Ported handle_ip.tcl to handle_ip (PERL) and added lots of error

checking.  Also made it so that .1 addresses were no longer assigned and
it now works when run on IR files that already have a /ip section.

tbsetup/ir/GNUmakefile

@@ -8,7 +8,7 @@ include ../../GNUmakerules
 # These get installed with .tcl extensions.
 # 
 SCRIPTS		= assign.tcl handle_os extract_tb.tcl libir.tcl \
-		  handle_ip.tcl libir.pm
+		  handle_ip libir.pm
 
 all:
 

tbsetup/ir/handle_ip

+#!/usr/bin/perl -w
+# This rather ugly programs takes a post-assign IR file and the 
+# original ns file and adds the ip and ip-mac sections.  This is 
+# necessary because assign has no awareness of the IP layer.
+
+# LIMITATIONS:
+#  Assumes at most 1 link between any two nodes. [Fixing this limitations
+# would also involved changing the TB cmd syntax]
+
+# This is the prefix used for assigning otherwise unassigned IP addresses:
+$ip_base = "192.168";
+
+push(@INC,"/usr/testbed/lib/tbsetup/ir");
+require libir;
+
+use DBI;
+$driver = "mysql";
+$dbh = DBI->connect("DBI:$driver:database=tbdb;host=localhost") || do {
+    print STDERR "Could not connect to DB.\n";
+    exit(1);
+};
+
+if ($#ARGV != 1) {
+    print STDERR "Syntax: $0 irfile nsfile\n";
+    exit(1);
+}
+
+($irfile,$nsfile) = @ARGV;
+
+# read IR file
+eval {&ir_read($irfile)};
+if ($@) {
+    print STDERR "Could not read $irfile ($@)\n";
+    exit(1);
+}
+
+# Make sure we have links
+&ir_exists("/topology/links") || do {
+    print STDERR "IR does not contain topology/links section.\n";
+    exit(1);
+};
+
+# open NS file
+open(NSFILE,$nsfile) || do {
+    print STDERR "Could not open $nsfile\n";
+    exit(1);
+};
+
+# Read mac map into vlanmap
+# vlanmap is indexed by vlan name and contains a reference
+# to a list of MACs.
+&ir_exists("/vlan") || do {
+    print STDERR "IR does not contain vlan section.\n";
+    exit(1);
+};
+foreach (split("\n",&ir_get("/vlan"))) {
+    @vlan = split;
+    $vlanmap{$vlan[0]} = [@vlan[1..$#vlan]];
+}
+
+# Read in node map into vnodemap and rvnodemap (reverse)
+# vnodemap is indexed by virtual and contains the physical name
+# rvnodemap is indexed by physical name and contains the virtual name.
+&ir_exists("/virtual/nodes") || do {
+    print STDERR "IR does not contain virtual/nodes section.\n";
+    exit(1);
+};
+foreach (split("\n",&ir_get("/virtual/nodes"))) {
+    ($virtual,$physical) = split;
+    $vnodemap{$virtual} = $physical;
+    $rvnodemap{$physical} = $virtual;
+}
+
+# Pull the MAC table from the database.
+# MACTABLE is indexed by virtual node name and contains a reference
+# to a list of MACs.
+$sth = $dbh->prepare("SELECT node_id,MAC from interfaces");
+$sth->execute || do {
+    print STDERR "Could not get MAC table from DB.\n";
+    exit(1);
+};
+while (@row = $sth->fetchrow_array) {
+    ($node,$mac) = @row;
+    if (defined($rvnodemap{$node})) {
+	if (! defined($MACTABLE{$rvnodemap{$node}})) {
+	    $MACTABLE{$rvnodemap{$node}} = [];
+	}
+	push(@{$MACTABLE{$rvnodemap{$node}}},$mac);
+    }
+}
+$sth->finish;
+
+# This is a list of error messages
+@ERRORS = ();
+
+# Read NS file
+# IP is indexed either by src or by src:dst and contains the IP address.
+while (<NSFILE>) {
+    if (/^#TB/) {
+	chop;
+	@line = split;
+	$_ = $line[1];
+      SWITCH1: {
+	  /^set-ip$/ && do {
+	      # set-ip <node> <ip>
+	      if ($#line != 3) {
+		  push(@ERRORS,"Syntax: set-ip node ip\n");
+		  last SWITCH1;
+	      } 
+	      ($node,$ip) = @line[2..3];
+	      if (!defined($vnodemap{$node})) {
+		  push(@ERRORS,"$node is not a valid node.\n");
+		  last SWITCH1;
+	      }
+	      # This actually matches a valid IP address
+	      if (! ($ip =~ /^([0-9]{1,3}\.){3,3}[0-9]{1,3}$/)) {
+		  push(@ERRORS,"$ip is not a valid ip address.\n");
+		  last SWITCH1;
+	      }
+	      $IP{$node} = $ip;
+	      last SWITCH1;
+	  };
+	  /^set-ip-interface$/ && do {
+	      # set-ip-interface <node> <dst> <ip>
+	      if ($#line != 4) {
+		  push(@ERRORS,"Syntax: set-ip-interface node dst ip\n");
+		  last SWITCH1;
+	      } 
+	      ($node,$dst,$ip) = @line[2..4];
+	      if (! defined($vnodemap{$node})) {
+		  push(@ERRORS,"$node is not a valid node.\n");
+		  last SWITCH1;
+	      }
+	      if (! defined($vnodemap{$dst})) {
+		  push(@ERRORS,"$dst is not a valid node.\n");
+		  last SWITCH1;
+	      } 
+	      if (! ($ip =~ /^([0-9]{1,3}\.){3,3}[0-9]{1,3}$/)) {
+		  push(@ERRORS,"$ip is not a valid ip address.\n");
+		  last SWITCH1;
+	      }
+	      $IP{"$node:$dst"} = $ip;
+	      last SWITCH1;
+	  }
+      }
+    }
+}
+
+
+# At this point we have most of the data we need.  We now loop through all
+# the virtual links (/topology/links) assigning them IP addresses.  This is 
+# done in two phases.  The first phase uses the TB commands to assign
+# IP addresses.  In the second phase all remaining links are assigned
+# IP addresses.
+
+# There are two IP addresses associated with each link.  Since each link
+# is uniquely defined by it's src and dst we can denote each end of the
+# link by src->dst vs. dst->src.
+
+# We store the ir contents in ip_section.
+$ip_section = '';
+
+# ip_mac_section is actually an array since we need to add this to the
+# DB.  It's values are references to lists of [mac,ip]
+@ip_mac_section = ();
+
+# ips_assigned keeps track of which slots we've filled.  It's indexed by
+# src:dst indicating that the IP at src going to dst is filled.
+
+# ips_node is indexed by node and keeps track of all the IPs currently
+# assigned by a node. This is needed for proper subnetting.  The contents
+# is a reference to a list.
+
+# single_node is used to catch trying to use the set-ip cmd on nodes
+# with multiple links.  It's basically a counter for how much set-ips
+# are done on a node.
+
+# to_assign is filled out with what slots remain to be assigned.  It's
+# indexed by link and contains a reference to a list [src,dst,flag] where 
+# if flag is 0 it indicates the slot src->dst and if flag is one it 
+# indicates that both src->dst and dst->src need to be filled.
+
+# intersect - intersection of two lists.  Takes two list references
+# and returns a single element.
+# We assume that the intersection is of size 1 for optimization.
+sub intersect {
+    local($Aref,$Bref) = @_;
+    local($A,$B);
+    foreach $A (@$Aref) {
+	foreach $B (@$Bref) {
+	    if ($A eq $B) {
+		return $A;
+	    }
+	}
+    }
+    return "";
+};
+
+# get_macs link - Returns all MAC addresses associated with a link.  Because
+# a link can pass through a delay node this may be more than two.  Returns
+# a string.
+sub get_macs {
+    local($i)=0;
+    local($macs)=[];
+
+    while (defined($vlanmap{"$_[0]-$i"})) {
+	push(@$macs,@{$vlanmap{"$_[0]-$i"}});
+	$i++;
+    }
+
+    return $macs;
+};
+
+# Phase 1
+foreach (split("\n",&ir_get("/topology/links"))) {
+    @t = split;
+    ($link,$src,$dst) = @t[0,1,3];
+
+    # We need to do two iterations, (A=src, B=dst) and (A=dst, B=src)
+    $A = $src; $B = $dst;
+    foreach (1..2) {
+	# Look for assigned ip
+	if (defined($IP{"$A:$B"})) {
+	    $ip_section .= "$A $B $IP{$A . ':' . $B}\n";
+	    push(@ip_mac_section, 
+		 [&intersect($MACTABLE{$A},&get_macs($link)),$IP{"$A:$B"}]);
+	    $ips_assigned{$IP{"$A:$B"}} = 1;
+	    if (!defined($ips_node{$A})) {
+		$ips_node{$A} = [];
+	    }
+	    push(@{$ips_node{$A}},$IP{"$A:$B"});
+	} elsif (defined($IP{$A})) {
+	    # node-wide IP address
+	    if (defined($single_node{$A})) {
+		push(@ERRORS,"Can not use set-ip on nodes with multiple links ($A)");
+	    } else {
+		# mark as a single_node
+		$single_node{$A} = 1;
+		$ip_section .= "$A $B $IP{$A}\n";
+		push(@ip_mac_section,
+		     [&intersect($MACTABLE{$A},&get_macs($link)),$IP{$A}]);
+		$ips_assigned{$IP{$A}} = 1;
+		if (!defined($ips_node{$A})) {
+		    $ips_node{$A} = [];
+		}
+		push(@{$ips_node{$A}},$IP{$A});
+	    }
+	} else {
+	    # mark for phase 2
+	    if (defined($to_assign{$link})) {
+		$to_assign{$link} = [$A,$B,1];
+	    } else {
+		$to_assign{$link} = [$A,$B,0];
+	    }
+	}
+	# swap for step 2
+	$A = $dst; $B = $src;
+    }
+}
+
+# Phase 2 - Assigning all unassigned nodes.
+
+# find_free_ip <subnet> - is a try-every-possibility routine that
+# finds the first free ip in a given subnet.
+# Note: unlike in handle_ip.tcl this does not add the return to
+# ips_assigned.
+sub find_free_ip {
+    local($subnet) = $_[0];
+    local($i);
+    for ($i=2;$i<250;$i++) {
+	if (!defined($ips_assigned{"$subnet.$i"})) {
+	    return "$subnet.$i";
+	}
+    }
+    return "";
+};
+  
+# get_subnet <ip> - Just parses out the subnet from an IP address.
+# Note: Does no checking to see if $ip is a correct ip address.
+sub get_subnet {
+    local($ip) = $_[0];
+    local(@t) = split('\.',$ip);
+    return join(".",@t[0..2]);
+};
+
+# find_free_subnet - Another try everything routine for finding
+# an unused subnet.
+sub find_free_subnet {
+    local(%used);
+    local($i);
+
+    foreach (keys(%ips_assigned)) {
+	$used{&get_subnet($_)} = 1;
+    }
+    for ($i=2;$i<250;$i++) {
+	if (!defined($used{"$ip_base.$i"})) {
+	    return "$ip_base.$i";
+	}
+    }
+
+    return "";
+};
+
+foreach $left (keys(%to_assign)) {
+    ($node,$dst,$both) = @{$to_assign{$left}};
+    if ($both == 1) {
+	$subnet = &find_free_subnet();
+	$ipA = &find_free_ip($subnet);
+	$ips_assigned{$ipA} = 1;
+	$ipB = &find_free_ip($subnet);
+	$ips_assigned{$ipB} = 1;
+	$ip_section .= "$node $dst $ipA\n";
+	$macs = &get_macs($left);
+	push(@ip_mac_section,[&intersect($MACTABLE{$node},$macs),$ipA]);
+	$ip_section .= "$dst $node $ipB\n";
+	push(@ip_mac_section,[&intersect($MACTABLE{$dst},$macs),$ipB]);
+	push(@{$ips_node{$node}},$ipA);
+	push(@{$ips_node{$dst}},$ipB);
+    } else {
+	if (defined($IP{"$dst:$node"})) {
+	    $subnet = &get_subnet($IP{"$dst:$node"});
+	} elsif (defined($IP{$dst})) {
+	    $subnet = &get_subnet($IP{$dst});
+	} else {
+	    $subnet = &find_free_subnet();
+	}
+	$ip = &find_free_ip($subnet);
+	$ips_assigned{$ip} = 1;
+	$ip_section .= "$node $dst $ip\n";
+	push(@ip_mac_section,
+	     [&intersect($MACTABLE{$node},&get_macs($left)),$ip]);
+	push(@{$ips_node{$node}},$ip);
+    }
+}
+
+# Output
+if ($#ERRORS != -1) {
+    foreach (@ERRORS) {
+	print STDERR $_ . "\n";
+    }
+    exit(1);
+}
+
+# We need to check whether the section exists arleady or not
+if (! &ir_exists("/ip")) {
+    # Fresh file just append.
+    open(IRFILE,">>$irfile") || do {
+	print STDERR "Can not open $irfile for appending.\n";
+	exit(1);
+    };
+    print IRFILE "START ip\n";
+    print IRFILE "START map\n";
+    print IRFILE $ip_section;
+    print IRFILE "END map\n";
+    print IRFILE "START mac\n";
+    foreach (@ip_mac_section) {
+	($mac,$ip) = @$_;
+	$sth = $dbh->prepare("UPDATE interfaces set IP = \"$ip\" where MAC = \"$mac\"");
+	$sth->execute;
+	print IRFILE "$mac $ip\n";
+    }
+    print IRFILE "END mac\n";
+    print IRFILE "END ip\n";
+    
+    close(IRFILE);
+} else {
+    # Use libir to overwrite.
+    # We need to generate the ip_mac section
+    $ip_mac_raw = "";
+    foreach (@ip_mac_section) {
+	($mac,$ip) = @$_;
+	$sth = $dbh->prepare("UPDATE interfaces set IP = \"$ip\" where MAC = \"$mac\"");
+	$sth->execute;
+	$ip_mac_raw .= "$mac $ip\n";
+    }
+    &ir_set("/ip/map",$ip_section);
+    &ir_set("/ip/mac",$ip_mac_raw);
+    eval {&ir_write($irfile)};
+    if ($@) {
+	print STDERR "Could not write $irfile ($@)\n";
+	exit(1);
+    }
+}
+
+0;

tbsetup/ir/handle_ip.tcl

-#!/usr/local/bin/tclsh
-# This program combines a ns input file and a post-assign IR file
-# to add the ip and ip-mac sections to the ir file.
-
-
-set scriptdir [file dirname [info script]]
-set updir [file dirname $scriptdir]
-#set mactable "$updir/switch_tools/intel510/macslist"
-source "$scriptdir/libir.tcl"
-if {[file exists $updir/../lib/sql.so]} {
-    load $updir/../lib/sql.so
-} else {
-    load $updir/../sql.so
-}
-
-set DB [sql connect]
-sql selectdb $DB tbdb
-
-namespace import TB_LIBIR::ir
-
-if {[llength $argv] != 2} {
-    puts stderr "Syntax: $argv0 <irfile> <nsfile>"
-    exit 1
-}
-
-set irfile [lindex $argv 0]
-set nsfile [lindex $argv 1]
-
-
-# Extract testbed commands
-set tbcommands [exec $scriptdir/extract_tb.tcl < $nsfile]
-
-# Read ir file
-ir read $irfile
-
-# Parse testbed commands
-foreach cmd [split $tbcommands "\n"] {
-    set c [lindex $cmd 0]
-    switch -- $c {
-	"set-ip" {
-	    set node [lindex $cmd 1]
-	    set ip [lindex $cmd 2]
-	    set IP($node) $ip
-	}
-	"set-ip-interface" {
-	    set node [lindex $cmd 1]
-	    set dst [lindex $cmd 2]
-	    set ip [lindex $cmd 3]
-	    set IP($node:$dst) $ip
-	}
-    }
-}
-
-# Read in link map
-if {! [ir exists /virtual/links]} {
-    puts stderr "IR does not contain virtual/links section."
-    exit 1
-}
-foreach pair [ir get /virtual/links] {
-    set vlinkmap([lindex $pair 0]) [lindex $pair 1]
-}
-
-# Read in mac map
-if {! [ir exists /vlan]} {
-    puts stderr "IR does not contain vlan section."
-    exit 1
-}
-foreach vlan [ir get /vlan] {
-    set vlanmap([lindex $vlan 0]) [lrange $vlan 1 end]
-}
-
-# Read in node map
-if {! [ir exists /virtual/nodes]} {
-    puts stderr "IR does not contain virtual/nodes section."
-    exit 1
-}
-foreach pair [ir get /virtual/nodes] {
-    set vnodemap([lindex $pair 0]) [lindex $pair 1]
-    set rvnodemap([lindex $pair 1]) [lindex $pair 0]
-}
-# Parse mac list
-# This is pretty dumb but is quick to do
-sql query $DB "select node_id,MAC from interfaces"
-while {[set row [sql fetchrow $DB]] != {}} {
-    set node [lindex $row 0]
-    set mac [lindex $row 1]
-    if {[info exists rvnodemap($node)]} {
-	lappend MACTABLE($rvnodemap($node)) $mac
-    }
-}
-
-# Loop through virtual links
-if {! [ir exists /topology/links]} {
-    puts stderr "IR does not contain topology/links section."
-    exit 1
-}
-
-proc subset {A B} {
-    set ret {}
-    foreach element $A {
-	if {[lsearch $B $element] != -1} {
-	    lappend ret $element
-	}
-    }
-    return $ret
-}
-
-proc get_macs {l} {
-    global vlanmap
-    
-    set i 0
-    set macs {}
-    while {[info exists vlanmap($l-$i)]} {
-	set macs [concat $macs $vlanmap($l-$i)]
-	incr i
-    }
-
-    return $macs
-}
-
-set ip_section {}
-set ip_mac_section {}
-foreach linkline [ir get /topology/links] {
-    set link [lindex $linkline 0]
-    set src [lindex $linkline 1]
-    set dst [lindex $linkline 3]
-
-    # Look for an assigned ip
-    if {[info exists IP($src:$dst)]} {
-	lappend ip_section [list $src $dst $IP($src:$dst)]
-	lappend ip_mac_section [list [subset $MACTABLE($src) [get_macs $link]] $IP($src:$dst)]
-	set ips_assigned($IP($src:$dst)) 1
-	lappend ips_node($src) $IP($src:$dst)
-    } elseif {[info exists IP($src)]} {
-	if {[info exists single_node($src)]} {
-	    puts stderr "Can not use set-ip on nodes with multiple links ($src)"
-	    exit 1
-	}
-	set single_node($src) 1
-	lappend ip_section [list $src $dst $IP($src)]
-	lappend ip_mac_section [list [subset $MACTABLE($src) [get_macs $link]] $IP($src)]
-	set ips_assigned($IP($src)) 1
-	lappend ips_node($src) $IP($src)
-    } else {
-	if {[info exists to_assign($link)]} {
-	    set to_assign($link) [list $src $dst 1]
-	} else {
-	    set to_assign($link) [list $src $dst 0]
-	}
-    }
-    if {[info exists IP($dst:$src)]} {
-	lappend ip_section [list $dst $src $IP($dst:$src)]
-	lappend ip_mac_section [list [subset $MACTABLE($dst) [get_macs $link]] $IP($dst:$src)]
-	set ips_assigned($IP($dst:$src)) 1
-	lappend ips_node($dst) $IP($dst:$src)
-    } elseif {[info exists IP($dst)]} {
-	if {[info exists single_node($dst)]} {
-	    puts stderr "Can not use set-ip on nodes with multiple links ($dst)"
-	    exit 1
-	}
-	set single_node($dst) 1
-	lappend ip_section [list $dst $src $IP($dst)]
-	lappend ip_mac_section [list [subset $MACTABLE($dst) [get_macs $link]] $IP($dst)]
-	set ips_assigned($IP($dst)) 1
-	lappend ips_node($dst) $IP($dst)
-    } else {
-	if {[info exists to_assign($link)]} {
-	    set to_assign($link) [list $dst $src 1]
-	} else {
-	    set to_assign($link) [list $dst $src 0]
-	}
-    }
-}
-
-# Assign all unassigned nodes
-set ip_base "192.168"
-
-proc find_free_ip {subnet} {
-    global ips_assigned
-    for {set i 1} {$i < 250} {incr i} {
-	if {! [info exists ips_assigned($subnet.$i)]} {
-	    set ips_assigned($subnet.$i) 1
-	    return $subnet.$i
-	}
-    }
-    return {}
-}
-
-proc get_subnet {ip} {
-    return [join [lrange [split $ip .] 0 2] .]
-}
-proc find_free_subnet {} {
-    global ips_assigned ip_base
-
-    foreach ip [array names ips_assigned] {
-	set used([get_subnet $ip]) 1
-    }
-    for {set i 1} {$i < 250} {incr i} {
-	if {! [info exists used($ip_base.$i)]} {return "$ip_base.$i"}
-    }
-    return {}
-}
-
-foreach left [array names to_assign] {
-    set node [lindex $to_assign($left) 0]
-    set dst [lindex $to_assign($left) 1]
-    set both [lindex $to_assign($left) 2]
-
-    if {$both == 1} {
-	set subnet [find_free_subnet]
-	set ipA [find_free_ip $subnet]
-	set ipB [find_free_ip $subnet]
-	lappend ip_section [list $node $dst $ipA]
-	lappend ip_mac_section [list [subset $MACTABLE($node) [get_macs $left]] $ipA]
-	lappend ip_section [list $dst $node $ipB]
-	lappend ip_mac_section [list [subset $MACTABLE($dst) [get_macs $left]] $ipB]
-	lappend ips_node($node) $ipA
-	lappend ips_node($dst) $ipB
-    } else {
-	if {[info exists IP($dst:$node)]} {
-	    set subnet [get_subnet $IP($dst:$node)]
-	} elseif {[info exists IP($dst)]} {
-	    set subnet [get_subnet $IP($dst)]
-	} else {
-	    set subnet [find_free_subnet]
-	}
-	set ip [find_free_ip $subnet]
-	lappend ip_section [list $node $dst $ip]
-	lappend ip_mac_section [list [subset $MACTABLE($node) [get_macs $left]] $ip]
-	lappend ips_node($node) $ip
-}