From c1d4c44042edbcdfe0b998360460fe0f20902274 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <stephen.hemminger@vyatta.com>
Date: Wed, 28 Jan 2009 08:42:18 -0800
Subject: bgp: cleanup

Turn on strict, and declare variables. Simplify code where possible.
---
 scripts/bgp/vyatta-bgp.pl | 88 +++++++++++++++++------------------------------
 1 file changed, 32 insertions(+), 56 deletions(-)

(limited to 'scripts/bgp/vyatta-bgp.pl')

diff --git a/scripts/bgp/vyatta-bgp.pl b/scripts/bgp/vyatta-bgp.pl
index 6ca3480e..931069c2 100755
--- a/scripts/bgp/vyatta-bgp.pl
+++ b/scripts/bgp/vyatta-bgp.pl
@@ -1,46 +1,35 @@
 #!/usr/bin/perl
+use strict;
 use lib "/opt/vyatta/share/perl5/";
 use Vyatta::Config;
 use Vyatta::Misc;
 use Getopt::Long;
 
-GetOptions("check-peer-name=s"      => \$peername,
-	   "check-as"		    => \$checkas,
-	   "check-peer-groups"	    => \$checkpeergroups,
-	   "check-if-peer-group"    => \$checkifpeergroup,
-           "peergroup=s"    	    => \$pg,
-           "as=s"		    => \$as,
-           "neighbor=s"		    => \$neighbor,
+my $pg = -1;
+my ($as, $neighbor);
+
+GetOptions(
+    "peergroup=s"    	    => \$pg,
+    "as=s"		    => \$as,
+    "neighbor=s"	    => \$neighbor,
+    "check-peer-name=s"     => sub { check_peer_name( $_[1] ) },
+    "check-as"		    => sub { check_as($pg, $neighbor, $as); },
+    "check-peer-groups"	    => sub { check_for_peer_groups($pg, $as); },
+    "check-if-peer-group"   => sub { check_if_peer_group($pg); },
 );
 
-if    (defined $peername) 	 	{ check_peer_name($peername); }
-elsif (defined $checkpeergroups &&
-       defined $pg &&
-       defined $as) 			{ check_for_peer_groups($pg, $as); }
-elsif (defined $neighbor && 
-       defined $as && 
-       defined $checkas && 
-       defined $pg) 		 	{ check_as($pg, $neighbor, $as); }
-elsif (defined $neighbor && 
-       defined $as && 
-       defined $checkas)  	 	{ check_as(-1, $neighbor, $as); }
-elsif (defined $pg &&
-       defined $checkifpeergroup)       { check_if_peer_group($pg); }
-
-
 exit 0;
 
 sub check_if_peer_group {
     my $neighbor = shift;
-
-    my $version = is_ip_v4_or_v6($neighbor);
-    exit 1 if defined $version;
+    
+    exit 1 if is_ip_v4_or_v6($neighbor);
     exit 0;
 }
 
 
 # Make sure the neighbor is a proper IP or name
-sub check_peer_name() {
+sub check_peer_name {
   my $neighbor = shift;
 
   $_ = $neighbor;
@@ -60,22 +49,20 @@ sub check_peer_name() {
 
 # Make sure we aren't deleteing a peer-group that has 
 # neighbors configured to us it
-sub check_for_peer_groups() {
+sub check_for_peer_groups {
   my $config = new Vyatta::Config;
   my $pg = shift;
   my $as = shift;
-  my $node = $pg;
-  my @peers, @neighbors;
+  my @peers;
 
   # short circuit if the neighbor is an IP rather than name
-  my $version = is_ip_v4_or_v6($node);
-  return if defined $version;
+  return if is_ip_v4_or_v6($pg);
 
   # get the list of neighbors and see if they have a peer-group set
   $config->setLevel("protocols bgp $as neighbor");
   my @neighbors = $config->listNodes();
   
-  foreach $node (@neighbors) { 
+  foreach my $node (@neighbors) { 
     my $peergroup = $config->returnValue("$node peer-group");
     if ($peergroup eq $pg) { push @peers, $node; }
   }
@@ -83,7 +70,7 @@ sub check_for_peer_groups() {
   # if we found peers in the previous statements
   # notify an return errors
   if (@peers) { 
-    foreach $node (@peers) {
+    foreach my $node (@peers) {
       print "neighbor $node uses peer-group $pg\n";
     }
     
@@ -96,7 +83,7 @@ sub check_for_peer_groups() {
 
 # make sure nodes are either in a peer group of have
 # a remote AS assigned to them.  
-sub check_as() {
+sub check_as {
   my $pg = shift;
   my $neighbor = shift;
   my $as = shift;
@@ -104,32 +91,21 @@ sub check_as() {
   my $pgtest = $neighbor;
 
   # if this is peer-group then short circuit this
-  my $version = is_ip_v4_or_v6($node);
-  return if ! defined $version;
+  return unless is_ip_v4_or_v6($pg);
 
   $config->setLevel("protocols bgp $as neighbor $neighbor");
-  $remoteas = $config->returnValue("remote-as");
+  my $remoteas = $config->returnValue("remote-as");
 
-  if (! defined $remoteas) {
-    if ($pg > 0) { 
-      $peergroup = 1; 
-      $peergroupas = 1;
-    }
-    else { 
-      $peergroup = $config->returnValue("peer-group"); 
-      $peergroupas = $config->returnValue(" .. $peergroup remote-as");
-    }
+  return unless $remoteas;
 
-    if (! defined $peergroup) {
-      print "protocols bgp $as neighbor $neighbor: you must define a remote-as or peer-group\n";
-      exit 1;
-    }
+  return if ($pg > 0);
 
-    if (! defined $peergroupas) {
-      print "protocols bgp $as neighbor $neighbor: you must define a remote-as in this neighbor or in peer-group $peergroup\n";
-      exit 1;
-    }
-  }
+  my $peergroup = $config->returnValue("peer-group"); 
+  my $peergroupas = $config->returnValue(" .. $peergroup remote-as");
 
-  return;
+  die "protocols bgp $as neighbor $neighbor: must define a remote-as or peer-group\n"
+      unless $peergroup;
+
+  die "protocols bgp $as neighbor $neighbor: must define a remote-as in neighbor or peer-group $peergroup\n"
+      unless $peergroupas;
 }
-- 
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