holm/shorewall_code
1
0
Fork 0
forked from extern/shorewall_code
Code Pull Requests Activity

Detect loops in accounting chain jumps

Browse Source
This commit is contained in:
Tom Eastep 2011-02-09 15:34:13 -08:00
parent 2d3162f424
commit f5beec56ec
1 changed files with 33 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
Shorewall/Perl/Shorewall/Accounting.pm
View File

@ -46,9 +46,9 @@ our %tables;
# Called by the compiler to [re-]initialize this module's state
#
sub initialize() {
our $jumpchainref;
$jumpchainref = undef;
%tables = ();
our $jumpchainref = undef;
%tables = ();
our %accountingjumps = ();
}
#
@ -56,7 +56,8 @@ sub initialize() {
#
sub process_accounting_rule( ) {
our $jumpchainref;
our $jumpchainref = 0;
our %accountingjumps;
my ($action, $chain, $source, $dest, $proto, $ports, $sports, $user, $mark, $ipsec, $headers ) = split_line1 1, 11, 'Accounting File';
@ -208,6 +209,8 @@ sub process_accounting_rule( ) {
$rule .= do_ipsec( $dir , $ipsec );
}
$accountingjumps{$jumpchainref->{name}}{$chain} = 1 if $jumpchainref;
fatal_error "$chain is not an accounting chain" unless $chainref->{accounting};
$restriction = $dir eq 'in' ? INPUT_RESTRICT : OUTPUT_RESTRICT if $dir;
@ -259,6 +262,8 @@ sub process_accounting_rule( ) {
sub setup_accounting() {
our %accountingjumps;
if ( my $fn = open_file 'accounting' ) {
first_entry "$doing $fn...";
@ -300,6 +305,30 @@ sub setup_accounting() {
for ( accounting_chainrefs ) {
warning_message "Accounting chain $_->{name} has no references" unless keys %{$_->{references}};
}
if ( my $chainswithjumps = keys %accountingjumps ) {
my $progress = 1;
while ( $chainswithjumps && $progress ) {
$progress = 0;
for my $chain1 ( keys %accountingjumps ) {
if ( keys %{$accountingjumps{$chain1}} ) {
for my $chain2 ( keys %{$accountingjumps{$chain1}} ) {
delete $accountingjumps{$chain1}{$chain2}, $progress = 1 unless $accountingjumps{$chain2};
}
} else {
delete $accountingjumps{$chain1};
$chainswithjumps--;
$progress = 1;
}
}
}
if ( $chainswithjumps ) {
my @chainswithjumps = keys %accountingjumps;
fatal_error "Jump loop involving the following chains: @chainswithjumps";
}
}
}
}