17f630d433
DHCPv6 doesn't really use broadcast; instead clients use reserved multicast addresses to talk to the server. ff02::1:2 (link scope) and ff05::1:3 (site scope) are used. This means the routing table has to have a route that can handle outgoing traffic to these addresses, which is ff00::/8. The kernel sometimes adds one for us, so we need to (a) make sure we don't tear that route down, and (b) that if it's not there before we start DHCPv6, that we add it. Otherwise dhclient complains about not being able to send outgoing traffic from it's send_packet6() function with "no route to host". It will then use an expired lease, which causes NM to assign that leases IP address to the interface, whcih causes the kernel to assign the required ff00::/8 route, and then dhclient performs a renew (since the expired lease has expired of course) and then everything works out in the end. But the latency sucks. So make DHCPv6 faster by ensuring that dhclient has the routes it needs before we start the DHCP session.
98 lines
4.5 KiB
C
98 lines
4.5 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* NetworkManager -- Network link manager
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright (C) 2004 - 2010 Red Hat, Inc.
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* Copyright (C) 2005 - 2008 Novell, Inc.
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*/
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#ifndef NETWORK_MANAGER_SYSTEM_H
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#define NETWORK_MANAGER_SYSTEM_H
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#include <netlink/route/rtnl.h>
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#include <netlink/route/route.h>
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#include <net/ethernet.h>
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#include <glib.h>
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#include "nm-device.h"
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#include "nm-ip4-config.h"
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/* Prototypes for system/distribution dependent functions,
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* implemented in the backend files in backends/ directory
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*/
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void nm_system_device_flush_routes (NMDevice *dev, int family);
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void nm_system_device_flush_routes_with_iface (const char *iface, int family);
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gboolean nm_system_replace_default_ip4_route (const char *iface,
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guint32 gw,
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guint32 mss);
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gboolean nm_system_replace_default_ip6_route (const char *iface,
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const struct in6_addr *gw);
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gboolean nm_system_replace_default_ip4_route_vpn (const char *iface,
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guint32 ext_gw,
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guint32 int_gw,
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guint32 mss,
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const char *parent_iface,
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guint32 parent_mss);
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struct rtnl_route *nm_system_add_ip4_vpn_gateway_route (NMDevice *parent_device, NMIP4Config *vpn_config);
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void nm_system_device_flush_addresses (NMDevice *dev);
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void nm_system_device_flush_addresses_with_iface (const char *iface);
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void nm_system_enable_loopback (void);
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void nm_system_update_dns (void);
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gboolean nm_system_apply_ip4_config (const char *iface,
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NMIP4Config *config,
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int priority,
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NMIP4ConfigCompareFlags flags);
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int nm_system_set_ip6_route (int ifindex,
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const struct in6_addr *ip6_dest,
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guint32 ip6_prefix,
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const struct in6_addr *ip6_gateway,
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guint32 metric,
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int mss,
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int protocol,
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int table,
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struct rtnl_route **out_route);
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gboolean nm_system_apply_ip6_config (const char *iface,
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NMIP6Config *config,
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int priority,
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NMIP6ConfigCompareFlags flags);
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gboolean nm_system_device_set_up_down (NMDevice *dev,
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gboolean up,
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gboolean *no_firmware);
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gboolean nm_system_device_set_up_down_with_iface (const char *iface,
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gboolean up,
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gboolean *no_firmware);
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gboolean nm_system_device_is_up (NMDevice *device);
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gboolean nm_system_device_is_up_with_iface (const char *iface);
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gboolean nm_system_device_set_mtu (const char *iface, guint32 mtu);
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gboolean nm_system_device_set_mac (const char *iface, const struct ether_addr *mac);
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#endif
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