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Improve dynamic gateway detection

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- Use provider's routing table, if any

Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep 2017-08-23 15:04:47 -07:00
parent 90f33dd436
commit b54a691110
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GPG Key ID: 96E6B3F2423A4D10
3 changed files with 9 additions and 5 deletions
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6
Shorewall/Perl/Shorewall/Chains.pm
View File

@ -7065,6 +7065,8 @@ sub interface_gateway( $ ) {
sub get_interface_gateway ( $;$$ ) {
my ( $logical, $protect, $provider ) = @_;
$provider = '' unless defined $provider;
my $interface = get_physical $logical;
my $variable = interface_gateway( $interface );
my $gateway = get_interface_option( $interface, 'gateway' );
@ -7078,9 +7080,9 @@ sub get_interface_gateway ( $;$$ ) {
}
if ( interface_is_optional $logical ) {
$interfacegateways{$interface} = qq([ -n "\$$variable" ] || $variable=\$(detect_gateway $interface));
$interfacegateways{$interface} = qq([ -n "\$$variable" ] || $variable=\$(detect_gateway $interface $provider));
} else {
$interfacegateways{$interface} = qq([ -n "\$$variable" ] || $variable=\$(detect_gateway $interface)
$interfacegateways{$interface} = qq([ -n "\$$variable" ] || $variable=\$(detect_gateway $interface $provider)
[ -n "\$$variable" ] || startup_error "Unable to detect the gateway through interface $interface");
}

2
Shorewall/Perl/Shorewall/Providers.pm
View File

@ -502,7 +502,7 @@ sub process_a_provider( $ ) {
if ( ( $gw = lc $gateway ) eq 'detect' ) {
fatal_error "Configuring multiple providers through one interface requires an explicit gateway" if $shared;
$gateway = get_interface_gateway( $interface, undef, 1 );
$gateway = get_interface_gateway( $interface, undef, $number );
$gatewaycase = 'detect';
set_interface_option( $interface, 'gateway', 'detect' );
} elsif ( $gw eq 'none' ) {

6
Shorewall/Perl/lib.runtime
View File

@ -421,7 +421,7 @@ restore_default_route() # $1 = USE_DEFAULT_RT
conditionally_flush_conntrack() {
if [ -n "$g_purge" ]; then
if [ -n $(mywhich conntrack) ]; then
if [ -n "$(mywhich conntrack)" ]; then
conntrack -F
else
error_message "WARNING: The '-p' option requires the conntrack utility which does not appear to be installed on this system"
@ -899,7 +899,7 @@ detect_dynamic_gateway() { # $1 = interface
#
# Detect the gateway through an interface
#
detect_gateway() # $1 = interface
detect_gateway() # $1 = interface $2 = table number
{
local interface
interface=$1
@ -912,6 +912,8 @@ detect_gateway() # $1 = interface
# Maybe there's a default route through this gateway already
#
[ -n "$gateway" ] || gateway=$(find_gateway $($IP -4 route list dev $interface | grep ^default))
[ -z "$gateway" -a -n "$2" ] && gateway=$(find_gateway $($IP -4 route list dev $interface table $2 | grep ^default))
#
# Last hope -- is there a load-balancing route through the interface?
#