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Add large BGP communities support #3

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Add large BGP communities support #3

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20 changes: 20 additions & 0 deletions zebra-dump-parser.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,7 @@
BGP_ATTR_MP_REACH_NLRI => 14,
BGP_ATTR_MP_UNREACH_NLRI => 15,
BGP_ATTR_EXT_COMMUNITIES => 16,
BGP_ATTR_LARGE_COMMUNITIES => 32,
};

my @BGP_ORIGIN = qw(IGP EGP Incomplete);
Expand Down Expand Up @@ -377,6 +378,12 @@ sub parse_attributes {
my $community = substr($attrib, 0, 4, '');
push(@{$attr[BGP_ATTR_COMMUNITIES]}, $community);
}
} elsif ($type == BGP_ATTR_LARGE_COMMUNITIES) {
$attr[BGP_ATTR_LARGE_COMMUNITIES] = [ ];
while (length $attrib > 0) {
my $community = substr($attrib, 0, 12, '');
push(@{$attr[BGP_ATTR_LARGE_COMMUNITIES]}, $community);
}
} elsif ($type == BGP_ATTR_MP_REACH_NLRI) {
# FIXME v2 uses a different format
my ($afi, $safi, $next_hop, $rest) = unpack('n C C/a a*', $attrib);
Expand Down Expand Up @@ -517,6 +524,9 @@ sub print_verbose_attributes {
print "COMMUNITIES: "
. print_communities(@{$attr->[BGP_ATTR_COMMUNITIES]}) . "\n"
if $attr->[BGP_ATTR_COMMUNITIES];
print "LARGE_COMMUNITIES: "
. print_large_communities(@{$attr->[BGP_ATTR_LARGE_COMMUNITIES]}) . "\n"
if $attr->[BGP_ATTR_LARGE_COMMUNITIES];
}

sub print_communities {
Expand All @@ -529,6 +539,16 @@ sub print_communities {
return join(' ', @communities);
}

sub print_large_communities {
my @communities;
foreach my $community (@_) {
my ($ga, $ldp1, $ldp2) = unpack('N N N', $community);
push(@communities, "${ga}:${ldp1}:${ldp2}");
}

return join(' ', @communities);
}

sub pretty_as {
my ($as_hi, $as_lo) = unpack('nn', $_[0]);
return defined $as_lo ? ($as_hi ? unpack('N', $_[0]) : $as_lo) : $as_hi;
Expand Down