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313a71ee7b
While the default iptables setup used by Fedora/RHEL distros only restricts traffic on the INPUT and/or FORWARD rules, some users might have custom firewalls that restrict the OUTPUT rules too. These can prevent DHCP/DNS/TFTP responses from dnsmasq from reaching the guest VMs. We should thus whitelist these protocols in the OUTPUT chain, as well as the INPUT chain. Signed-off-by: Malina Salina <malina.salina@protonmail.com> Initial patch then modified to add unit tests and IPv6 support Reviewed-by: Michal Privoznik <mprivozn@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
158 lines
8.8 KiB
C
158 lines
8.8 KiB
C
/*
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* viriptables.h: helper APIs for managing iptables
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*
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* Copyright (C) 2007, 2008 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "virsocketaddr.h"
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#include "virfirewall.h"
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int iptablesSetupPrivateChains (virFirewallLayer layer);
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void iptablesSetDeletePrivate (bool pvt);
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void iptablesAddTcpInput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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void iptablesRemoveTcpInput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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void iptablesAddUdpInput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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void iptablesRemoveUdpInput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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void iptablesAddTcpOutput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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void iptablesRemoveTcpOutput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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void iptablesAddUdpOutput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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void iptablesRemoveUdpOutput (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface,
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int port);
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int iptablesAddForwardAllowOut (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesRemoveForwardAllowOut (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesAddForwardAllowRelatedIn(virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesRemoveForwardAllowRelatedIn(virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesAddForwardAllowIn (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesRemoveForwardAllowIn (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *iface,
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const char *physdev)
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G_GNUC_WARN_UNUSED_RESULT;
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void iptablesAddForwardAllowCross (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface);
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void iptablesRemoveForwardAllowCross (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface);
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void iptablesAddForwardRejectOut (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface);
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void iptablesRemoveForwardRejectOut (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface);
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void iptablesAddForwardRejectIn (virFirewallPtr fw,
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virFirewallLayer layer,
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const char *iface);
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void iptablesRemoveForwardRejectIn (virFirewallPtr fw,
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virFirewallLayer layery,
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const char *iface);
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int iptablesAddForwardMasquerade (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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virSocketAddrRangePtr addr,
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virPortRangePtr port,
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const char *protocol)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesRemoveForwardMasquerade (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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virSocketAddrRangePtr addr,
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virPortRangePtr port,
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const char *protocol)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesAddDontMasquerade (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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const char *destaddr)
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G_GNUC_WARN_UNUSED_RESULT;
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int iptablesRemoveDontMasquerade (virFirewallPtr fw,
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virSocketAddr *netaddr,
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unsigned int prefix,
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const char *physdev,
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const char *destaddr)
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G_GNUC_WARN_UNUSED_RESULT;
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void iptablesAddOutputFixUdpChecksum (virFirewallPtr fw,
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const char *iface,
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int port);
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void iptablesRemoveOutputFixUdpChecksum (virFirewallPtr fw,
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const char *iface,
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int port);
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