4301 lines
104 KiB
C
4301 lines
104 KiB
C
/*
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* IPv6 Address [auto]configuration
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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* Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
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*
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* $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* Changes:
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*
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* Janos Farkas : delete timer on ifdown
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* <chexum@bankinf.banki.hu>
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* Andi Kleen : kill double kfree on module
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* unload.
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* Maciej W. Rozycki : FDDI support
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* sekiya@USAGI : Don't send too many RS
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* packets.
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* yoshfuji@USAGI : Fixed interval between DAD
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* packets.
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* YOSHIFUJI Hideaki @USAGI : improved accuracy of
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* address validation timer.
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* YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
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* support.
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* Yuji SEKIYA @USAGI : Don't assign a same IPv6
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* address on a same interface.
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* YOSHIFUJI Hideaki @USAGI : ARCnet support
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* YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
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* seq_file.
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* YOSHIFUJI Hideaki @USAGI : improved source address
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* selection; consider scope,
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* status etc.
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <linux/in6.h>
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#include <linux/netdevice.h>
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#include <linux/if_addr.h>
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#include <linux/if_arp.h>
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#include <linux/if_arcnet.h>
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#include <linux/if_infiniband.h>
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#include <linux/route.h>
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#include <linux/inetdevice.h>
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#include <linux/init.h>
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#ifdef CONFIG_SYSCTL
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#include <linux/sysctl.h>
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#endif
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#include <linux/capability.h>
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#include <linux/delay.h>
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#include <linux/notifier.h>
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#include <linux/string.h>
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#include <net/net_namespace.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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#include <net/ipv6.h>
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#include <net/protocol.h>
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#include <net/ndisc.h>
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#include <net/ip6_route.h>
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#include <net/addrconf.h>
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#include <net/tcp.h>
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#include <net/ip.h>
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#include <net/netlink.h>
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#include <net/pkt_sched.h>
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#include <linux/if_tunnel.h>
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#include <linux/rtnetlink.h>
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#ifdef CONFIG_IPV6_PRIVACY
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#include <linux/random.h>
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#endif
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#include <asm/uaccess.h>
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#include <asm/unaligned.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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/* Set to 3 to get tracing... */
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#define ACONF_DEBUG 2
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#if ACONF_DEBUG >= 3
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#define ADBG(x) printk x
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#else
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#define ADBG(x)
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#endif
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#define INFINITY_LIFE_TIME 0xFFFFFFFF
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#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
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#ifdef CONFIG_SYSCTL
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static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
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static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
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#endif
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#ifdef CONFIG_IPV6_PRIVACY
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static int __ipv6_regen_rndid(struct inet6_dev *idev);
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static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
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static void ipv6_regen_rndid(unsigned long data);
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static int desync_factor = MAX_DESYNC_FACTOR * HZ;
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#endif
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static int ipv6_count_addresses(struct inet6_dev *idev);
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/*
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* Configured unicast address hash table
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*/
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static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
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static DEFINE_RWLOCK(addrconf_hash_lock);
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static void addrconf_verify(unsigned long);
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static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
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static DEFINE_SPINLOCK(addrconf_verify_lock);
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static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
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static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
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static int addrconf_ifdown(struct net_device *dev, int how);
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static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
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static void addrconf_dad_timer(unsigned long data);
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static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
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static void addrconf_dad_run(struct inet6_dev *idev);
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static void addrconf_rs_timer(unsigned long data);
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static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
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static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
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static void inet6_prefix_notify(int event, struct inet6_dev *idev,
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struct prefix_info *pinfo);
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static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
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static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
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struct ipv6_devconf ipv6_devconf __read_mostly = {
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.forwarding = 0,
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.hop_limit = IPV6_DEFAULT_HOPLIMIT,
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.mtu6 = IPV6_MIN_MTU,
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.accept_ra = 1,
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.accept_redirects = 1,
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.autoconf = 1,
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.force_mld_version = 0,
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.dad_transmits = 1,
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.rtr_solicits = MAX_RTR_SOLICITATIONS,
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.rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
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.rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
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#ifdef CONFIG_IPV6_PRIVACY
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.use_tempaddr = 0,
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.temp_valid_lft = TEMP_VALID_LIFETIME,
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.temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
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.regen_max_retry = REGEN_MAX_RETRY,
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.max_desync_factor = MAX_DESYNC_FACTOR,
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#endif
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.max_addresses = IPV6_MAX_ADDRESSES,
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.accept_ra_defrtr = 1,
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.accept_ra_pinfo = 1,
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#ifdef CONFIG_IPV6_ROUTER_PREF
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.accept_ra_rtr_pref = 1,
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.rtr_probe_interval = 60 * HZ,
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#ifdef CONFIG_IPV6_ROUTE_INFO
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.accept_ra_rt_info_max_plen = 0,
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#endif
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#endif
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.proxy_ndp = 0,
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.accept_source_route = 0, /* we do not accept RH0 by default. */
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};
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static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
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.forwarding = 0,
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.hop_limit = IPV6_DEFAULT_HOPLIMIT,
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.mtu6 = IPV6_MIN_MTU,
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.accept_ra = 1,
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.accept_redirects = 1,
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.autoconf = 1,
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.dad_transmits = 1,
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.rtr_solicits = MAX_RTR_SOLICITATIONS,
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.rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
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.rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
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#ifdef CONFIG_IPV6_PRIVACY
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.use_tempaddr = 0,
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.temp_valid_lft = TEMP_VALID_LIFETIME,
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.temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
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.regen_max_retry = REGEN_MAX_RETRY,
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.max_desync_factor = MAX_DESYNC_FACTOR,
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#endif
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.max_addresses = IPV6_MAX_ADDRESSES,
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.accept_ra_defrtr = 1,
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.accept_ra_pinfo = 1,
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#ifdef CONFIG_IPV6_ROUTER_PREF
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.accept_ra_rtr_pref = 1,
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.rtr_probe_interval = 60 * HZ,
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#ifdef CONFIG_IPV6_ROUTE_INFO
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.accept_ra_rt_info_max_plen = 0,
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#endif
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#endif
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.proxy_ndp = 0,
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.accept_source_route = 0, /* we do not accept RH0 by default. */
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};
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/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
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const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
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const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
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/* Check if a valid qdisc is available */
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static inline int addrconf_qdisc_ok(struct net_device *dev)
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{
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return (dev->qdisc != &noop_qdisc);
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}
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static void addrconf_del_timer(struct inet6_ifaddr *ifp)
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{
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if (del_timer(&ifp->timer))
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__in6_ifa_put(ifp);
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}
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enum addrconf_timer_t
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{
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AC_NONE,
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AC_DAD,
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AC_RS,
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};
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static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
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enum addrconf_timer_t what,
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unsigned long when)
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{
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if (!del_timer(&ifp->timer))
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in6_ifa_hold(ifp);
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switch (what) {
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case AC_DAD:
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ifp->timer.function = addrconf_dad_timer;
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break;
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case AC_RS:
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ifp->timer.function = addrconf_rs_timer;
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break;
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default:;
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}
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ifp->timer.expires = jiffies + when;
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add_timer(&ifp->timer);
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}
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static int snmp6_alloc_dev(struct inet6_dev *idev)
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{
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if (snmp_mib_init((void **)idev->stats.ipv6,
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sizeof(struct ipstats_mib),
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__alignof__(struct ipstats_mib)) < 0)
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goto err_ip;
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if (snmp_mib_init((void **)idev->stats.icmpv6,
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sizeof(struct icmpv6_mib),
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__alignof__(struct icmpv6_mib)) < 0)
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goto err_icmp;
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if (snmp_mib_init((void **)idev->stats.icmpv6msg,
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sizeof(struct icmpv6msg_mib),
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__alignof__(struct icmpv6msg_mib)) < 0)
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goto err_icmpmsg;
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return 0;
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err_icmpmsg:
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snmp_mib_free((void **)idev->stats.icmpv6);
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err_icmp:
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snmp_mib_free((void **)idev->stats.ipv6);
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err_ip:
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return -ENOMEM;
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}
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static void snmp6_free_dev(struct inet6_dev *idev)
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{
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snmp_mib_free((void **)idev->stats.icmpv6msg);
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snmp_mib_free((void **)idev->stats.icmpv6);
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snmp_mib_free((void **)idev->stats.ipv6);
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}
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/* Nobody refers to this device, we may destroy it. */
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static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
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{
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struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
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kfree(idev);
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}
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void in6_dev_finish_destroy(struct inet6_dev *idev)
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{
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struct net_device *dev = idev->dev;
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BUG_TRAP(idev->addr_list==NULL);
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BUG_TRAP(idev->mc_list==NULL);
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#ifdef NET_REFCNT_DEBUG
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printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
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#endif
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dev_put(dev);
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if (!idev->dead) {
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printk("Freeing alive inet6 device %p\n", idev);
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return;
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}
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snmp6_free_dev(idev);
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call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
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}
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EXPORT_SYMBOL(in6_dev_finish_destroy);
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static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
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{
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struct inet6_dev *ndev;
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struct in6_addr maddr;
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ASSERT_RTNL();
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if (dev->mtu < IPV6_MIN_MTU)
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return NULL;
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ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
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if (ndev == NULL)
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return NULL;
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rwlock_init(&ndev->lock);
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ndev->dev = dev;
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memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
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ndev->cnf.mtu6 = dev->mtu;
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ndev->cnf.sysctl = NULL;
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ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
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if (ndev->nd_parms == NULL) {
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kfree(ndev);
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return NULL;
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}
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/* We refer to the device */
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dev_hold(dev);
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if (snmp6_alloc_dev(ndev) < 0) {
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ADBG((KERN_WARNING
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"%s(): cannot allocate memory for statistics; dev=%s.\n",
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__FUNCTION__, dev->name));
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neigh_parms_release(&nd_tbl, ndev->nd_parms);
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ndev->dead = 1;
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in6_dev_finish_destroy(ndev);
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return NULL;
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}
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if (snmp6_register_dev(ndev) < 0) {
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ADBG((KERN_WARNING
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"%s(): cannot create /proc/net/dev_snmp6/%s\n",
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__FUNCTION__, dev->name));
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neigh_parms_release(&nd_tbl, ndev->nd_parms);
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ndev->dead = 1;
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in6_dev_finish_destroy(ndev);
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return NULL;
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}
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|
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/* One reference from device. We must do this before
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* we invoke __ipv6_regen_rndid().
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*/
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in6_dev_hold(ndev);
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|
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#ifdef CONFIG_IPV6_PRIVACY
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init_timer(&ndev->regen_timer);
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ndev->regen_timer.function = ipv6_regen_rndid;
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ndev->regen_timer.data = (unsigned long) ndev;
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if ((dev->flags&IFF_LOOPBACK) ||
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dev->type == ARPHRD_TUNNEL ||
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#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
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dev->type == ARPHRD_SIT ||
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#endif
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dev->type == ARPHRD_NONE) {
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printk(KERN_INFO
|
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"%s: Disabled Privacy Extensions\n",
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dev->name);
|
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ndev->cnf.use_tempaddr = -1;
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} else {
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in6_dev_hold(ndev);
|
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ipv6_regen_rndid((unsigned long) ndev);
|
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}
|
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#endif
|
|
|
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if (netif_running(dev) && addrconf_qdisc_ok(dev))
|
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ndev->if_flags |= IF_READY;
|
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|
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ipv6_mc_init_dev(ndev);
|
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ndev->tstamp = jiffies;
|
|
#ifdef CONFIG_SYSCTL
|
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neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
|
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NET_IPV6_NEIGH, "ipv6",
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&ndisc_ifinfo_sysctl_change,
|
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NULL);
|
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addrconf_sysctl_register(ndev, &ndev->cnf);
|
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#endif
|
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/* protected by rtnl_lock */
|
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rcu_assign_pointer(dev->ip6_ptr, ndev);
|
|
|
|
/* Join all-node multicast group */
|
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ipv6_addr_all_nodes(&maddr);
|
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ipv6_dev_mc_inc(dev, &maddr);
|
|
|
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return ndev;
|
|
}
|
|
|
|
static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
|
|
{
|
|
struct inet6_dev *idev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if ((idev = __in6_dev_get(dev)) == NULL) {
|
|
if ((idev = ipv6_add_dev(dev)) == NULL)
|
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return NULL;
|
|
}
|
|
|
|
if (dev->flags&IFF_UP)
|
|
ipv6_mc_up(idev);
|
|
return idev;
|
|
}
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
static void dev_forward_change(struct inet6_dev *idev)
|
|
{
|
|
struct net_device *dev;
|
|
struct inet6_ifaddr *ifa;
|
|
struct in6_addr addr;
|
|
|
|
if (!idev)
|
|
return;
|
|
dev = idev->dev;
|
|
if (dev && (dev->flags & IFF_MULTICAST)) {
|
|
ipv6_addr_all_routers(&addr);
|
|
|
|
if (idev->cnf.forwarding)
|
|
ipv6_dev_mc_inc(dev, &addr);
|
|
else
|
|
ipv6_dev_mc_dec(dev, &addr);
|
|
}
|
|
for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
|
|
if (ifa->flags&IFA_F_TENTATIVE)
|
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continue;
|
|
if (idev->cnf.forwarding)
|
|
addrconf_join_anycast(ifa);
|
|
else
|
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addrconf_leave_anycast(ifa);
|
|
}
|
|
}
|
|
|
|
|
|
static void addrconf_forward_change(void)
|
|
{
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev;
|
|
|
|
read_lock(&dev_base_lock);
|
|
for_each_netdev(&init_net, dev) {
|
|
rcu_read_lock();
|
|
idev = __in6_dev_get(dev);
|
|
if (idev) {
|
|
int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
|
|
idev->cnf.forwarding = ipv6_devconf.forwarding;
|
|
if (changed)
|
|
dev_forward_change(idev);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
read_unlock(&dev_base_lock);
|
|
}
|
|
#endif
|
|
|
|
/* Nobody refers to this ifaddr, destroy it */
|
|
|
|
void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
|
|
{
|
|
BUG_TRAP(ifp->if_next==NULL);
|
|
BUG_TRAP(ifp->lst_next==NULL);
|
|
#ifdef NET_REFCNT_DEBUG
|
|
printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
|
|
#endif
|
|
|
|
in6_dev_put(ifp->idev);
|
|
|
|
if (del_timer(&ifp->timer))
|
|
printk("Timer is still running, when freeing ifa=%p\n", ifp);
|
|
|
|
if (!ifp->dead) {
|
|
printk("Freeing alive inet6 address %p\n", ifp);
|
|
return;
|
|
}
|
|
dst_release(&ifp->rt->u.dst);
|
|
|
|
kfree(ifp);
|
|
}
|
|
|
|
static void
|
|
ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
|
|
{
|
|
struct inet6_ifaddr *ifa, **ifap;
|
|
int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
|
|
|
|
/*
|
|
* Each device address list is sorted in order of scope -
|
|
* global before linklocal.
|
|
*/
|
|
for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
|
|
ifap = &ifa->if_next) {
|
|
if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
|
|
break;
|
|
}
|
|
|
|
ifp->if_next = *ifap;
|
|
*ifap = ifp;
|
|
}
|
|
|
|
/* On success it returns ifp with increased reference count */
|
|
|
|
static struct inet6_ifaddr *
|
|
ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
|
|
int scope, u32 flags)
|
|
{
|
|
struct inet6_ifaddr *ifa = NULL;
|
|
struct rt6_info *rt;
|
|
int hash;
|
|
int err = 0;
|
|
|
|
rcu_read_lock_bh();
|
|
if (idev->dead) {
|
|
err = -ENODEV; /*XXX*/
|
|
goto out2;
|
|
}
|
|
|
|
write_lock(&addrconf_hash_lock);
|
|
|
|
/* Ignore adding duplicate addresses on an interface */
|
|
if (ipv6_chk_same_addr(addr, idev->dev)) {
|
|
ADBG(("ipv6_add_addr: already assigned\n"));
|
|
err = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
|
|
|
|
if (ifa == NULL) {
|
|
ADBG(("ipv6_add_addr: malloc failed\n"));
|
|
err = -ENOBUFS;
|
|
goto out;
|
|
}
|
|
|
|
rt = addrconf_dst_alloc(idev, addr, 0);
|
|
if (IS_ERR(rt)) {
|
|
err = PTR_ERR(rt);
|
|
goto out;
|
|
}
|
|
|
|
ipv6_addr_copy(&ifa->addr, addr);
|
|
|
|
spin_lock_init(&ifa->lock);
|
|
init_timer(&ifa->timer);
|
|
ifa->timer.data = (unsigned long) ifa;
|
|
ifa->scope = scope;
|
|
ifa->prefix_len = pfxlen;
|
|
ifa->flags = flags | IFA_F_TENTATIVE;
|
|
ifa->cstamp = ifa->tstamp = jiffies;
|
|
|
|
ifa->rt = rt;
|
|
|
|
/*
|
|
* part one of RFC 4429, section 3.3
|
|
* We should not configure an address as
|
|
* optimistic if we do not yet know the link
|
|
* layer address of our nexhop router
|
|
*/
|
|
|
|
if (rt->rt6i_nexthop == NULL)
|
|
ifa->flags &= ~IFA_F_OPTIMISTIC;
|
|
|
|
ifa->idev = idev;
|
|
in6_dev_hold(idev);
|
|
/* For caller */
|
|
in6_ifa_hold(ifa);
|
|
|
|
/* Add to big hash table */
|
|
hash = ipv6_addr_hash(addr);
|
|
|
|
ifa->lst_next = inet6_addr_lst[hash];
|
|
inet6_addr_lst[hash] = ifa;
|
|
in6_ifa_hold(ifa);
|
|
write_unlock(&addrconf_hash_lock);
|
|
|
|
write_lock(&idev->lock);
|
|
/* Add to inet6_dev unicast addr list. */
|
|
ipv6_link_dev_addr(idev, ifa);
|
|
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
if (ifa->flags&IFA_F_TEMPORARY) {
|
|
ifa->tmp_next = idev->tempaddr_list;
|
|
idev->tempaddr_list = ifa;
|
|
in6_ifa_hold(ifa);
|
|
}
|
|
#endif
|
|
|
|
in6_ifa_hold(ifa);
|
|
write_unlock(&idev->lock);
|
|
out2:
|
|
rcu_read_unlock_bh();
|
|
|
|
if (likely(err == 0))
|
|
atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
|
|
else {
|
|
kfree(ifa);
|
|
ifa = ERR_PTR(err);
|
|
}
|
|
|
|
return ifa;
|
|
out:
|
|
write_unlock(&addrconf_hash_lock);
|
|
goto out2;
|
|
}
|
|
|
|
/* This function wants to get referenced ifp and releases it before return */
|
|
|
|
static void ipv6_del_addr(struct inet6_ifaddr *ifp)
|
|
{
|
|
struct inet6_ifaddr *ifa, **ifap;
|
|
struct inet6_dev *idev = ifp->idev;
|
|
int hash;
|
|
int deleted = 0, onlink = 0;
|
|
unsigned long expires = jiffies;
|
|
|
|
hash = ipv6_addr_hash(&ifp->addr);
|
|
|
|
ifp->dead = 1;
|
|
|
|
write_lock_bh(&addrconf_hash_lock);
|
|
for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
|
|
ifap = &ifa->lst_next) {
|
|
if (ifa == ifp) {
|
|
*ifap = ifa->lst_next;
|
|
__in6_ifa_put(ifp);
|
|
ifa->lst_next = NULL;
|
|
break;
|
|
}
|
|
}
|
|
write_unlock_bh(&addrconf_hash_lock);
|
|
|
|
write_lock_bh(&idev->lock);
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
if (ifp->flags&IFA_F_TEMPORARY) {
|
|
for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
|
|
ifap = &ifa->tmp_next) {
|
|
if (ifa == ifp) {
|
|
*ifap = ifa->tmp_next;
|
|
if (ifp->ifpub) {
|
|
in6_ifa_put(ifp->ifpub);
|
|
ifp->ifpub = NULL;
|
|
}
|
|
__in6_ifa_put(ifp);
|
|
ifa->tmp_next = NULL;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
|
|
if (ifa == ifp) {
|
|
*ifap = ifa->if_next;
|
|
__in6_ifa_put(ifp);
|
|
ifa->if_next = NULL;
|
|
if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
|
|
break;
|
|
deleted = 1;
|
|
continue;
|
|
} else if (ifp->flags & IFA_F_PERMANENT) {
|
|
if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
|
|
ifp->prefix_len)) {
|
|
if (ifa->flags & IFA_F_PERMANENT) {
|
|
onlink = 1;
|
|
if (deleted)
|
|
break;
|
|
} else {
|
|
unsigned long lifetime;
|
|
|
|
if (!onlink)
|
|
onlink = -1;
|
|
|
|
spin_lock(&ifa->lock);
|
|
lifetime = min_t(unsigned long,
|
|
ifa->valid_lft, 0x7fffffffUL/HZ);
|
|
if (time_before(expires,
|
|
ifa->tstamp + lifetime * HZ))
|
|
expires = ifa->tstamp + lifetime * HZ;
|
|
spin_unlock(&ifa->lock);
|
|
}
|
|
}
|
|
}
|
|
ifap = &ifa->if_next;
|
|
}
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
ipv6_ifa_notify(RTM_DELADDR, ifp);
|
|
|
|
atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
|
|
|
|
addrconf_del_timer(ifp);
|
|
|
|
/*
|
|
* Purge or update corresponding prefix
|
|
*
|
|
* 1) we don't purge prefix here if address was not permanent.
|
|
* prefix is managed by its own lifetime.
|
|
* 2) if there're no addresses, delete prefix.
|
|
* 3) if there're still other permanent address(es),
|
|
* corresponding prefix is still permanent.
|
|
* 4) otherwise, update prefix lifetime to the
|
|
* longest valid lifetime among the corresponding
|
|
* addresses on the device.
|
|
* Note: subsequent RA will update lifetime.
|
|
*
|
|
* --yoshfuji
|
|
*/
|
|
if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
|
|
struct in6_addr prefix;
|
|
struct rt6_info *rt;
|
|
|
|
ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
|
|
rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
|
|
|
|
if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
|
|
if (onlink == 0) {
|
|
ip6_del_rt(rt);
|
|
rt = NULL;
|
|
} else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
|
|
rt->rt6i_expires = expires;
|
|
rt->rt6i_flags |= RTF_EXPIRES;
|
|
}
|
|
}
|
|
dst_release(&rt->u.dst);
|
|
}
|
|
|
|
in6_ifa_put(ifp);
|
|
}
|
|
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
|
|
{
|
|
struct inet6_dev *idev = ifp->idev;
|
|
struct in6_addr addr, *tmpaddr;
|
|
unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
|
|
int tmp_plen;
|
|
int ret = 0;
|
|
int max_addresses;
|
|
u32 addr_flags;
|
|
|
|
write_lock(&idev->lock);
|
|
if (ift) {
|
|
spin_lock_bh(&ift->lock);
|
|
memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
|
|
spin_unlock_bh(&ift->lock);
|
|
tmpaddr = &addr;
|
|
} else {
|
|
tmpaddr = NULL;
|
|
}
|
|
retry:
|
|
in6_dev_hold(idev);
|
|
if (idev->cnf.use_tempaddr <= 0) {
|
|
write_unlock(&idev->lock);
|
|
printk(KERN_INFO
|
|
"ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
|
|
in6_dev_put(idev);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
spin_lock_bh(&ifp->lock);
|
|
if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
|
|
idev->cnf.use_tempaddr = -1; /*XXX*/
|
|
spin_unlock_bh(&ifp->lock);
|
|
write_unlock(&idev->lock);
|
|
printk(KERN_WARNING
|
|
"ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
|
|
in6_dev_put(idev);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
in6_ifa_hold(ifp);
|
|
memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
|
|
if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
|
|
spin_unlock_bh(&ifp->lock);
|
|
write_unlock(&idev->lock);
|
|
printk(KERN_WARNING
|
|
"ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
|
|
in6_ifa_put(ifp);
|
|
in6_dev_put(idev);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
memcpy(&addr.s6_addr[8], idev->rndid, 8);
|
|
tmp_valid_lft = min_t(__u32,
|
|
ifp->valid_lft,
|
|
idev->cnf.temp_valid_lft);
|
|
tmp_prefered_lft = min_t(__u32,
|
|
ifp->prefered_lft,
|
|
idev->cnf.temp_prefered_lft - desync_factor / HZ);
|
|
tmp_plen = ifp->prefix_len;
|
|
max_addresses = idev->cnf.max_addresses;
|
|
tmp_cstamp = ifp->cstamp;
|
|
tmp_tstamp = ifp->tstamp;
|
|
spin_unlock_bh(&ifp->lock);
|
|
|
|
write_unlock(&idev->lock);
|
|
|
|
addr_flags = IFA_F_TEMPORARY;
|
|
/* set in addrconf_prefix_rcv() */
|
|
if (ifp->flags & IFA_F_OPTIMISTIC)
|
|
addr_flags |= IFA_F_OPTIMISTIC;
|
|
|
|
ift = !max_addresses ||
|
|
ipv6_count_addresses(idev) < max_addresses ?
|
|
ipv6_add_addr(idev, &addr, tmp_plen,
|
|
ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
|
|
addr_flags) : NULL;
|
|
if (!ift || IS_ERR(ift)) {
|
|
in6_ifa_put(ifp);
|
|
in6_dev_put(idev);
|
|
printk(KERN_INFO
|
|
"ipv6_create_tempaddr(): retry temporary address regeneration.\n");
|
|
tmpaddr = &addr;
|
|
write_lock(&idev->lock);
|
|
goto retry;
|
|
}
|
|
|
|
spin_lock_bh(&ift->lock);
|
|
ift->ifpub = ifp;
|
|
ift->valid_lft = tmp_valid_lft;
|
|
ift->prefered_lft = tmp_prefered_lft;
|
|
ift->cstamp = tmp_cstamp;
|
|
ift->tstamp = tmp_tstamp;
|
|
spin_unlock_bh(&ift->lock);
|
|
|
|
addrconf_dad_start(ift, 0);
|
|
in6_ifa_put(ift);
|
|
in6_dev_put(idev);
|
|
out:
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Choose an appropriate source address (RFC3484)
|
|
*/
|
|
struct ipv6_saddr_score {
|
|
int addr_type;
|
|
unsigned int attrs;
|
|
int matchlen;
|
|
int scope;
|
|
unsigned int rule;
|
|
};
|
|
|
|
#define IPV6_SADDR_SCORE_LOCAL 0x0001
|
|
#define IPV6_SADDR_SCORE_PREFERRED 0x0004
|
|
#define IPV6_SADDR_SCORE_HOA 0x0008
|
|
#define IPV6_SADDR_SCORE_OIF 0x0010
|
|
#define IPV6_SADDR_SCORE_LABEL 0x0020
|
|
#define IPV6_SADDR_SCORE_PRIVACY 0x0040
|
|
|
|
static inline int ipv6_saddr_preferred(int type)
|
|
{
|
|
if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
|
|
IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* static matching label */
|
|
static inline int ipv6_saddr_label(const struct in6_addr *addr, int type)
|
|
{
|
|
/*
|
|
* prefix (longest match) label
|
|
* -----------------------------
|
|
* ::1/128 0
|
|
* ::/0 1
|
|
* 2002::/16 2
|
|
* ::/96 3
|
|
* ::ffff:0:0/96 4
|
|
* fc00::/7 5
|
|
* 2001::/32 6
|
|
*/
|
|
if (type & IPV6_ADDR_LOOPBACK)
|
|
return 0;
|
|
else if (type & IPV6_ADDR_COMPATv4)
|
|
return 3;
|
|
else if (type & IPV6_ADDR_MAPPED)
|
|
return 4;
|
|
else if (addr->s6_addr32[0] == htonl(0x20010000))
|
|
return 6;
|
|
else if (addr->s6_addr16[0] == htons(0x2002))
|
|
return 2;
|
|
else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
|
|
return 5;
|
|
return 1;
|
|
}
|
|
|
|
int ipv6_dev_get_saddr(struct net_device *daddr_dev,
|
|
struct in6_addr *daddr, struct in6_addr *saddr)
|
|
{
|
|
struct ipv6_saddr_score hiscore;
|
|
struct inet6_ifaddr *ifa_result = NULL;
|
|
int daddr_type = __ipv6_addr_type(daddr);
|
|
int daddr_scope = __ipv6_addr_src_scope(daddr_type);
|
|
u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
|
|
struct net_device *dev;
|
|
|
|
memset(&hiscore, 0, sizeof(hiscore));
|
|
|
|
read_lock(&dev_base_lock);
|
|
rcu_read_lock();
|
|
|
|
for_each_netdev(&init_net, dev) {
|
|
struct inet6_dev *idev;
|
|
struct inet6_ifaddr *ifa;
|
|
|
|
/* Rule 0: Candidate Source Address (section 4)
|
|
* - multicast and link-local destination address,
|
|
* the set of candidate source address MUST only
|
|
* include addresses assigned to interfaces
|
|
* belonging to the same link as the outgoing
|
|
* interface.
|
|
* (- For site-local destination addresses, the
|
|
* set of candidate source addresses MUST only
|
|
* include addresses assigned to interfaces
|
|
* belonging to the same site as the outgoing
|
|
* interface.)
|
|
*/
|
|
if ((daddr_type & IPV6_ADDR_MULTICAST ||
|
|
daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
|
|
daddr_dev && dev != daddr_dev)
|
|
continue;
|
|
|
|
idev = __in6_dev_get(dev);
|
|
if (!idev)
|
|
continue;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
|
|
struct ipv6_saddr_score score;
|
|
|
|
score.addr_type = __ipv6_addr_type(&ifa->addr);
|
|
|
|
/* Rule 0:
|
|
* - Tentative Address (RFC2462 section 5.4)
|
|
* - A tentative address is not considered
|
|
* "assigned to an interface" in the traditional
|
|
* sense, unless it is also flagged as optimistic.
|
|
* - Candidate Source Address (section 4)
|
|
* - In any case, anycast addresses, multicast
|
|
* addresses, and the unspecified address MUST
|
|
* NOT be included in a candidate set.
|
|
*/
|
|
if ((ifa->flags & IFA_F_TENTATIVE) &&
|
|
(!(ifa->flags & IFA_F_OPTIMISTIC)))
|
|
continue;
|
|
if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
|
|
score.addr_type & IPV6_ADDR_MULTICAST)) {
|
|
LIMIT_NETDEBUG(KERN_DEBUG
|
|
"ADDRCONF: unspecified / multicast address "
|
|
"assigned as unicast address on %s",
|
|
dev->name);
|
|
continue;
|
|
}
|
|
|
|
score.attrs = 0;
|
|
score.matchlen = 0;
|
|
score.scope = 0;
|
|
score.rule = 0;
|
|
|
|
if (ifa_result == NULL) {
|
|
/* record it if the first available entry */
|
|
goto record_it;
|
|
}
|
|
|
|
/* Rule 1: Prefer same address */
|
|
if (hiscore.rule < 1) {
|
|
if (ipv6_addr_equal(&ifa_result->addr, daddr))
|
|
hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
|
|
hiscore.rule++;
|
|
}
|
|
if (ipv6_addr_equal(&ifa->addr, daddr)) {
|
|
score.attrs |= IPV6_SADDR_SCORE_LOCAL;
|
|
if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
|
|
score.rule = 1;
|
|
goto record_it;
|
|
}
|
|
} else {
|
|
if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
|
|
continue;
|
|
}
|
|
|
|
/* Rule 2: Prefer appropriate scope */
|
|
if (hiscore.rule < 2) {
|
|
hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
|
|
hiscore.rule++;
|
|
}
|
|
score.scope = __ipv6_addr_src_scope(score.addr_type);
|
|
if (hiscore.scope < score.scope) {
|
|
if (hiscore.scope < daddr_scope) {
|
|
score.rule = 2;
|
|
goto record_it;
|
|
} else
|
|
continue;
|
|
} else if (score.scope < hiscore.scope) {
|
|
if (score.scope < daddr_scope)
|
|
break; /* addresses sorted by scope */
|
|
else {
|
|
score.rule = 2;
|
|
goto record_it;
|
|
}
|
|
}
|
|
|
|
/* Rule 3: Avoid deprecated and optimistic addresses */
|
|
if (hiscore.rule < 3) {
|
|
if (ipv6_saddr_preferred(hiscore.addr_type) ||
|
|
(((ifa_result->flags &
|
|
(IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0)))
|
|
hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
|
|
hiscore.rule++;
|
|
}
|
|
if (ipv6_saddr_preferred(score.addr_type) ||
|
|
(((ifa->flags &
|
|
(IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)) == 0))) {
|
|
score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
|
|
if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
|
|
score.rule = 3;
|
|
goto record_it;
|
|
}
|
|
} else {
|
|
if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
|
|
continue;
|
|
}
|
|
|
|
/* Rule 4: Prefer home address */
|
|
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
|
|
if (hiscore.rule < 4) {
|
|
if (ifa_result->flags & IFA_F_HOMEADDRESS)
|
|
hiscore.attrs |= IPV6_SADDR_SCORE_HOA;
|
|
hiscore.rule++;
|
|
}
|
|
if (ifa->flags & IFA_F_HOMEADDRESS) {
|
|
score.attrs |= IPV6_SADDR_SCORE_HOA;
|
|
if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) {
|
|
score.rule = 4;
|
|
goto record_it;
|
|
}
|
|
} else {
|
|
if (hiscore.attrs & IPV6_SADDR_SCORE_HOA)
|
|
continue;
|
|
}
|
|
#else
|
|
if (hiscore.rule < 4)
|
|
hiscore.rule++;
|
|
#endif
|
|
|
|
/* Rule 5: Prefer outgoing interface */
|
|
if (hiscore.rule < 5) {
|
|
if (daddr_dev == NULL ||
|
|
daddr_dev == ifa_result->idev->dev)
|
|
hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
|
|
hiscore.rule++;
|
|
}
|
|
if (daddr_dev == NULL ||
|
|
daddr_dev == ifa->idev->dev) {
|
|
score.attrs |= IPV6_SADDR_SCORE_OIF;
|
|
if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
|
|
score.rule = 5;
|
|
goto record_it;
|
|
}
|
|
} else {
|
|
if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
|
|
continue;
|
|
}
|
|
|
|
/* Rule 6: Prefer matching label */
|
|
if (hiscore.rule < 6) {
|
|
if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
|
|
hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
|
|
hiscore.rule++;
|
|
}
|
|
if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
|
|
score.attrs |= IPV6_SADDR_SCORE_LABEL;
|
|
if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
|
|
score.rule = 6;
|
|
goto record_it;
|
|
}
|
|
} else {
|
|
if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
|
|
continue;
|
|
}
|
|
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
/* Rule 7: Prefer public address
|
|
* Note: prefer temprary address if use_tempaddr >= 2
|
|
*/
|
|
if (hiscore.rule < 7) {
|
|
if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
|
|
(ifa_result->idev->cnf.use_tempaddr >= 2))
|
|
hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
|
|
hiscore.rule++;
|
|
}
|
|
if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
|
|
(ifa->idev->cnf.use_tempaddr >= 2)) {
|
|
score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
|
|
if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
|
|
score.rule = 7;
|
|
goto record_it;
|
|
}
|
|
} else {
|
|
if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
|
|
continue;
|
|
}
|
|
#else
|
|
if (hiscore.rule < 7)
|
|
hiscore.rule++;
|
|
#endif
|
|
/* Rule 8: Use longest matching prefix */
|
|
if (hiscore.rule < 8) {
|
|
hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
|
|
hiscore.rule++;
|
|
}
|
|
score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
|
|
if (score.matchlen > hiscore.matchlen) {
|
|
score.rule = 8;
|
|
goto record_it;
|
|
}
|
|
#if 0
|
|
else if (score.matchlen < hiscore.matchlen)
|
|
continue;
|
|
#endif
|
|
|
|
/* Final Rule: choose first available one */
|
|
continue;
|
|
record_it:
|
|
if (ifa_result)
|
|
in6_ifa_put(ifa_result);
|
|
in6_ifa_hold(ifa);
|
|
ifa_result = ifa;
|
|
hiscore = score;
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
rcu_read_unlock();
|
|
read_unlock(&dev_base_lock);
|
|
|
|
if (!ifa_result)
|
|
return -EADDRNOTAVAIL;
|
|
|
|
ipv6_addr_copy(saddr, &ifa_result->addr);
|
|
in6_ifa_put(ifa_result);
|
|
return 0;
|
|
}
|
|
|
|
|
|
int ipv6_get_saddr(struct dst_entry *dst,
|
|
struct in6_addr *daddr, struct in6_addr *saddr)
|
|
{
|
|
return ipv6_dev_get_saddr(dst ? ip6_dst_idev(dst)->dev : NULL, daddr, saddr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ipv6_get_saddr);
|
|
|
|
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
|
|
unsigned char banned_flags)
|
|
{
|
|
struct inet6_dev *idev;
|
|
int err = -EADDRNOTAVAIL;
|
|
|
|
rcu_read_lock();
|
|
if ((idev = __in6_dev_get(dev)) != NULL) {
|
|
struct inet6_ifaddr *ifp;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
|
|
if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) {
|
|
ipv6_addr_copy(addr, &ifp->addr);
|
|
err = 0;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
rcu_read_unlock();
|
|
return err;
|
|
}
|
|
|
|
static int ipv6_count_addresses(struct inet6_dev *idev)
|
|
{
|
|
int cnt = 0;
|
|
struct inet6_ifaddr *ifp;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
|
|
cnt++;
|
|
read_unlock_bh(&idev->lock);
|
|
return cnt;
|
|
}
|
|
|
|
int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
|
|
{
|
|
struct inet6_ifaddr * ifp;
|
|
u8 hash = ipv6_addr_hash(addr);
|
|
|
|
read_lock_bh(&addrconf_hash_lock);
|
|
for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
|
|
if (ipv6_addr_equal(&ifp->addr, addr) &&
|
|
!(ifp->flags&IFA_F_TENTATIVE)) {
|
|
if (dev == NULL || ifp->idev->dev == dev ||
|
|
!(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&addrconf_hash_lock);
|
|
return ifp != NULL;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ipv6_chk_addr);
|
|
|
|
static
|
|
int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
|
|
{
|
|
struct inet6_ifaddr * ifp;
|
|
u8 hash = ipv6_addr_hash(addr);
|
|
|
|
for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
|
|
if (ipv6_addr_equal(&ifp->addr, addr)) {
|
|
if (dev == NULL || ifp->idev->dev == dev)
|
|
break;
|
|
}
|
|
}
|
|
return ifp != NULL;
|
|
}
|
|
|
|
struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
|
|
{
|
|
struct inet6_ifaddr * ifp;
|
|
u8 hash = ipv6_addr_hash(addr);
|
|
|
|
read_lock_bh(&addrconf_hash_lock);
|
|
for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
|
|
if (ipv6_addr_equal(&ifp->addr, addr)) {
|
|
if (dev == NULL || ifp->idev->dev == dev ||
|
|
!(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
|
|
in6_ifa_hold(ifp);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
read_unlock_bh(&addrconf_hash_lock);
|
|
|
|
return ifp;
|
|
}
|
|
|
|
int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
|
|
{
|
|
const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
|
|
const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
|
|
__be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
|
|
__be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
|
|
int sk_ipv6only = ipv6_only_sock(sk);
|
|
int sk2_ipv6only = inet_v6_ipv6only(sk2);
|
|
int addr_type = ipv6_addr_type(sk_rcv_saddr6);
|
|
int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
|
|
|
|
if (!sk2_rcv_saddr && !sk_ipv6only)
|
|
return 1;
|
|
|
|
if (addr_type2 == IPV6_ADDR_ANY &&
|
|
!(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
|
|
return 1;
|
|
|
|
if (addr_type == IPV6_ADDR_ANY &&
|
|
!(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
|
|
return 1;
|
|
|
|
if (sk2_rcv_saddr6 &&
|
|
ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
|
|
return 1;
|
|
|
|
if (addr_type == IPV6_ADDR_MAPPED &&
|
|
!sk2_ipv6only &&
|
|
(!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Gets referenced address, destroys ifaddr */
|
|
|
|
static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
|
|
{
|
|
if (ifp->flags&IFA_F_PERMANENT) {
|
|
spin_lock_bh(&ifp->lock);
|
|
addrconf_del_timer(ifp);
|
|
ifp->flags |= IFA_F_TENTATIVE;
|
|
spin_unlock_bh(&ifp->lock);
|
|
in6_ifa_put(ifp);
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
} else if (ifp->flags&IFA_F_TEMPORARY) {
|
|
struct inet6_ifaddr *ifpub;
|
|
spin_lock_bh(&ifp->lock);
|
|
ifpub = ifp->ifpub;
|
|
if (ifpub) {
|
|
in6_ifa_hold(ifpub);
|
|
spin_unlock_bh(&ifp->lock);
|
|
ipv6_create_tempaddr(ifpub, ifp);
|
|
in6_ifa_put(ifpub);
|
|
} else {
|
|
spin_unlock_bh(&ifp->lock);
|
|
}
|
|
ipv6_del_addr(ifp);
|
|
#endif
|
|
} else
|
|
ipv6_del_addr(ifp);
|
|
}
|
|
|
|
void addrconf_dad_failure(struct inet6_ifaddr *ifp)
|
|
{
|
|
if (net_ratelimit())
|
|
printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
|
|
addrconf_dad_stop(ifp);
|
|
}
|
|
|
|
/* Join to solicited addr multicast group. */
|
|
|
|
void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
|
|
{
|
|
struct in6_addr maddr;
|
|
|
|
if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
|
|
return;
|
|
|
|
addrconf_addr_solict_mult(addr, &maddr);
|
|
ipv6_dev_mc_inc(dev, &maddr);
|
|
}
|
|
|
|
void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
|
|
{
|
|
struct in6_addr maddr;
|
|
|
|
if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
|
|
return;
|
|
|
|
addrconf_addr_solict_mult(addr, &maddr);
|
|
__ipv6_dev_mc_dec(idev, &maddr);
|
|
}
|
|
|
|
static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
|
|
{
|
|
struct in6_addr addr;
|
|
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
|
|
if (ipv6_addr_any(&addr))
|
|
return;
|
|
ipv6_dev_ac_inc(ifp->idev->dev, &addr);
|
|
}
|
|
|
|
static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
|
|
{
|
|
struct in6_addr addr;
|
|
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
|
|
if (ipv6_addr_any(&addr))
|
|
return;
|
|
__ipv6_dev_ac_dec(ifp->idev, &addr);
|
|
}
|
|
|
|
static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
|
|
{
|
|
if (dev->addr_len != ETH_ALEN)
|
|
return -1;
|
|
memcpy(eui, dev->dev_addr, 3);
|
|
memcpy(eui + 5, dev->dev_addr + 3, 3);
|
|
|
|
/*
|
|
* The zSeries OSA network cards can be shared among various
|
|
* OS instances, but the OSA cards have only one MAC address.
|
|
* This leads to duplicate address conflicts in conjunction
|
|
* with IPv6 if more than one instance uses the same card.
|
|
*
|
|
* The driver for these cards can deliver a unique 16-bit
|
|
* identifier for each instance sharing the same card. It is
|
|
* placed instead of 0xFFFE in the interface identifier. The
|
|
* "u" bit of the interface identifier is not inverted in this
|
|
* case. Hence the resulting interface identifier has local
|
|
* scope according to RFC2373.
|
|
*/
|
|
if (dev->dev_id) {
|
|
eui[3] = (dev->dev_id >> 8) & 0xFF;
|
|
eui[4] = dev->dev_id & 0xFF;
|
|
} else {
|
|
eui[3] = 0xFF;
|
|
eui[4] = 0xFE;
|
|
eui[0] ^= 2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
|
|
{
|
|
/* XXX: inherit EUI-64 from other interface -- yoshfuji */
|
|
if (dev->addr_len != ARCNET_ALEN)
|
|
return -1;
|
|
memset(eui, 0, 7);
|
|
eui[7] = *(u8*)dev->dev_addr;
|
|
return 0;
|
|
}
|
|
|
|
static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
|
|
{
|
|
if (dev->addr_len != INFINIBAND_ALEN)
|
|
return -1;
|
|
memcpy(eui, dev->dev_addr + 12, 8);
|
|
eui[0] |= 2;
|
|
return 0;
|
|
}
|
|
|
|
static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
|
|
{
|
|
switch (dev->type) {
|
|
case ARPHRD_ETHER:
|
|
case ARPHRD_FDDI:
|
|
case ARPHRD_IEEE802_TR:
|
|
return addrconf_ifid_eui48(eui, dev);
|
|
case ARPHRD_ARCNET:
|
|
return addrconf_ifid_arcnet(eui, dev);
|
|
case ARPHRD_INFINIBAND:
|
|
return addrconf_ifid_infiniband(eui, dev);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
|
|
{
|
|
int err = -1;
|
|
struct inet6_ifaddr *ifp;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
|
|
if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
|
|
memcpy(eui, ifp->addr.s6_addr+8, 8);
|
|
err = 0;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
|
|
static int __ipv6_regen_rndid(struct inet6_dev *idev)
|
|
{
|
|
regen:
|
|
get_random_bytes(idev->rndid, sizeof(idev->rndid));
|
|
idev->rndid[0] &= ~0x02;
|
|
|
|
/*
|
|
* <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
|
|
* check if generated address is not inappropriate
|
|
*
|
|
* - Reserved subnet anycast (RFC 2526)
|
|
* 11111101 11....11 1xxxxxxx
|
|
* - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
|
|
* 00-00-5E-FE-xx-xx-xx-xx
|
|
* - value 0
|
|
* - XXX: already assigned to an address on the device
|
|
*/
|
|
if (idev->rndid[0] == 0xfd &&
|
|
(idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
|
|
(idev->rndid[7]&0x80))
|
|
goto regen;
|
|
if ((idev->rndid[0]|idev->rndid[1]) == 0) {
|
|
if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
|
|
goto regen;
|
|
if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
|
|
goto regen;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipv6_regen_rndid(unsigned long data)
|
|
{
|
|
struct inet6_dev *idev = (struct inet6_dev *) data;
|
|
unsigned long expires;
|
|
|
|
rcu_read_lock_bh();
|
|
write_lock_bh(&idev->lock);
|
|
|
|
if (idev->dead)
|
|
goto out;
|
|
|
|
if (__ipv6_regen_rndid(idev) < 0)
|
|
goto out;
|
|
|
|
expires = jiffies +
|
|
idev->cnf.temp_prefered_lft * HZ -
|
|
idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
|
|
if (time_before(expires, jiffies)) {
|
|
printk(KERN_WARNING
|
|
"ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
|
|
idev->dev->name);
|
|
goto out;
|
|
}
|
|
|
|
if (!mod_timer(&idev->regen_timer, expires))
|
|
in6_dev_hold(idev);
|
|
|
|
out:
|
|
write_unlock_bh(&idev->lock);
|
|
rcu_read_unlock_bh();
|
|
in6_dev_put(idev);
|
|
}
|
|
|
|
static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
|
|
int ret = 0;
|
|
|
|
if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
|
|
ret = __ipv6_regen_rndid(idev);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Add prefix route.
|
|
*/
|
|
|
|
static void
|
|
addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
|
|
unsigned long expires, u32 flags)
|
|
{
|
|
struct fib6_config cfg = {
|
|
.fc_table = RT6_TABLE_PREFIX,
|
|
.fc_metric = IP6_RT_PRIO_ADDRCONF,
|
|
.fc_ifindex = dev->ifindex,
|
|
.fc_expires = expires,
|
|
.fc_dst_len = plen,
|
|
.fc_flags = RTF_UP | flags,
|
|
};
|
|
|
|
ipv6_addr_copy(&cfg.fc_dst, pfx);
|
|
|
|
/* Prevent useless cloning on PtP SIT.
|
|
This thing is done here expecting that the whole
|
|
class of non-broadcast devices need not cloning.
|
|
*/
|
|
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
|
|
if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
|
|
cfg.fc_flags |= RTF_NONEXTHOP;
|
|
#endif
|
|
|
|
ip6_route_add(&cfg);
|
|
}
|
|
|
|
/* Create "default" multicast route to the interface */
|
|
|
|
static void addrconf_add_mroute(struct net_device *dev)
|
|
{
|
|
struct fib6_config cfg = {
|
|
.fc_table = RT6_TABLE_LOCAL,
|
|
.fc_metric = IP6_RT_PRIO_ADDRCONF,
|
|
.fc_ifindex = dev->ifindex,
|
|
.fc_dst_len = 8,
|
|
.fc_flags = RTF_UP,
|
|
};
|
|
|
|
ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
|
|
|
|
ip6_route_add(&cfg);
|
|
}
|
|
|
|
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
|
|
static void sit_route_add(struct net_device *dev)
|
|
{
|
|
struct fib6_config cfg = {
|
|
.fc_table = RT6_TABLE_MAIN,
|
|
.fc_metric = IP6_RT_PRIO_ADDRCONF,
|
|
.fc_ifindex = dev->ifindex,
|
|
.fc_dst_len = 96,
|
|
.fc_flags = RTF_UP | RTF_NONEXTHOP,
|
|
};
|
|
|
|
/* prefix length - 96 bits "::d.d.d.d" */
|
|
ip6_route_add(&cfg);
|
|
}
|
|
#endif
|
|
|
|
static void addrconf_add_lroute(struct net_device *dev)
|
|
{
|
|
struct in6_addr addr;
|
|
|
|
ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
|
|
addrconf_prefix_route(&addr, 64, dev, 0, 0);
|
|
}
|
|
|
|
static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
|
|
{
|
|
struct inet6_dev *idev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if ((idev = ipv6_find_idev(dev)) == NULL)
|
|
return NULL;
|
|
|
|
/* Add default multicast route */
|
|
addrconf_add_mroute(dev);
|
|
|
|
/* Add link local route */
|
|
addrconf_add_lroute(dev);
|
|
return idev;
|
|
}
|
|
|
|
void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
|
|
{
|
|
struct prefix_info *pinfo;
|
|
__u32 valid_lft;
|
|
__u32 prefered_lft;
|
|
int addr_type;
|
|
unsigned long rt_expires;
|
|
struct inet6_dev *in6_dev;
|
|
|
|
pinfo = (struct prefix_info *) opt;
|
|
|
|
if (len < sizeof(struct prefix_info)) {
|
|
ADBG(("addrconf: prefix option too short\n"));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Validation checks ([ADDRCONF], page 19)
|
|
*/
|
|
|
|
addr_type = ipv6_addr_type(&pinfo->prefix);
|
|
|
|
if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
|
|
return;
|
|
|
|
valid_lft = ntohl(pinfo->valid);
|
|
prefered_lft = ntohl(pinfo->prefered);
|
|
|
|
if (prefered_lft > valid_lft) {
|
|
if (net_ratelimit())
|
|
printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
|
|
return;
|
|
}
|
|
|
|
in6_dev = in6_dev_get(dev);
|
|
|
|
if (in6_dev == NULL) {
|
|
if (net_ratelimit())
|
|
printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Two things going on here:
|
|
* 1) Add routes for on-link prefixes
|
|
* 2) Configure prefixes with the auto flag set
|
|
*/
|
|
|
|
/* Avoid arithmetic overflow. Really, we could
|
|
save rt_expires in seconds, likely valid_lft,
|
|
but it would require division in fib gc, that it
|
|
not good.
|
|
*/
|
|
if (valid_lft >= 0x7FFFFFFF/HZ)
|
|
rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
|
|
else
|
|
rt_expires = valid_lft * HZ;
|
|
|
|
/*
|
|
* We convert this (in jiffies) to clock_t later.
|
|
* Avoid arithmetic overflow there as well.
|
|
* Overflow can happen only if HZ < USER_HZ.
|
|
*/
|
|
if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
|
|
rt_expires = 0x7FFFFFFF / USER_HZ;
|
|
|
|
if (pinfo->onlink) {
|
|
struct rt6_info *rt;
|
|
rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
|
|
|
|
if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
|
|
if (rt->rt6i_flags&RTF_EXPIRES) {
|
|
if (valid_lft == 0) {
|
|
ip6_del_rt(rt);
|
|
rt = NULL;
|
|
} else {
|
|
rt->rt6i_expires = jiffies + rt_expires;
|
|
}
|
|
}
|
|
} else if (valid_lft) {
|
|
addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
|
|
dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
|
|
}
|
|
if (rt)
|
|
dst_release(&rt->u.dst);
|
|
}
|
|
|
|
/* Try to figure out our local address for this prefix */
|
|
|
|
if (pinfo->autoconf && in6_dev->cnf.autoconf) {
|
|
struct inet6_ifaddr * ifp;
|
|
struct in6_addr addr;
|
|
int create = 0, update_lft = 0;
|
|
|
|
if (pinfo->prefix_len == 64) {
|
|
memcpy(&addr, &pinfo->prefix, 8);
|
|
if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
|
|
ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
|
|
in6_dev_put(in6_dev);
|
|
return;
|
|
}
|
|
goto ok;
|
|
}
|
|
if (net_ratelimit())
|
|
printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
|
|
pinfo->prefix_len);
|
|
in6_dev_put(in6_dev);
|
|
return;
|
|
|
|
ok:
|
|
|
|
ifp = ipv6_get_ifaddr(&addr, dev, 1);
|
|
|
|
if (ifp == NULL && valid_lft) {
|
|
int max_addresses = in6_dev->cnf.max_addresses;
|
|
u32 addr_flags = 0;
|
|
|
|
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
|
|
if (in6_dev->cnf.optimistic_dad &&
|
|
!ipv6_devconf.forwarding)
|
|
addr_flags = IFA_F_OPTIMISTIC;
|
|
#endif
|
|
|
|
/* Do not allow to create too much of autoconfigured
|
|
* addresses; this would be too easy way to crash kernel.
|
|
*/
|
|
if (!max_addresses ||
|
|
ipv6_count_addresses(in6_dev) < max_addresses)
|
|
ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
|
|
addr_type&IPV6_ADDR_SCOPE_MASK,
|
|
addr_flags);
|
|
|
|
if (!ifp || IS_ERR(ifp)) {
|
|
in6_dev_put(in6_dev);
|
|
return;
|
|
}
|
|
|
|
update_lft = create = 1;
|
|
ifp->cstamp = jiffies;
|
|
addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
|
|
}
|
|
|
|
if (ifp) {
|
|
int flags;
|
|
unsigned long now;
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
struct inet6_ifaddr *ift;
|
|
#endif
|
|
u32 stored_lft;
|
|
|
|
/* update lifetime (RFC2462 5.5.3 e) */
|
|
spin_lock(&ifp->lock);
|
|
now = jiffies;
|
|
if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
|
|
stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
|
|
else
|
|
stored_lft = 0;
|
|
if (!update_lft && stored_lft) {
|
|
if (valid_lft > MIN_VALID_LIFETIME ||
|
|
valid_lft > stored_lft)
|
|
update_lft = 1;
|
|
else if (stored_lft <= MIN_VALID_LIFETIME) {
|
|
/* valid_lft <= stored_lft is always true */
|
|
/* XXX: IPsec */
|
|
update_lft = 0;
|
|
} else {
|
|
valid_lft = MIN_VALID_LIFETIME;
|
|
if (valid_lft < prefered_lft)
|
|
prefered_lft = valid_lft;
|
|
update_lft = 1;
|
|
}
|
|
}
|
|
|
|
if (update_lft) {
|
|
ifp->valid_lft = valid_lft;
|
|
ifp->prefered_lft = prefered_lft;
|
|
ifp->tstamp = now;
|
|
flags = ifp->flags;
|
|
ifp->flags &= ~IFA_F_DEPRECATED;
|
|
spin_unlock(&ifp->lock);
|
|
|
|
if (!(flags&IFA_F_TENTATIVE))
|
|
ipv6_ifa_notify(0, ifp);
|
|
} else
|
|
spin_unlock(&ifp->lock);
|
|
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
read_lock_bh(&in6_dev->lock);
|
|
/* update all temporary addresses in the list */
|
|
for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
|
|
/*
|
|
* When adjusting the lifetimes of an existing
|
|
* temporary address, only lower the lifetimes.
|
|
* Implementations must not increase the
|
|
* lifetimes of an existing temporary address
|
|
* when processing a Prefix Information Option.
|
|
*/
|
|
spin_lock(&ift->lock);
|
|
flags = ift->flags;
|
|
if (ift->valid_lft > valid_lft &&
|
|
ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
|
|
ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
|
|
if (ift->prefered_lft > prefered_lft &&
|
|
ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
|
|
ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
|
|
spin_unlock(&ift->lock);
|
|
if (!(flags&IFA_F_TENTATIVE))
|
|
ipv6_ifa_notify(0, ift);
|
|
}
|
|
|
|
if (create && in6_dev->cnf.use_tempaddr > 0) {
|
|
/*
|
|
* When a new public address is created as described in [ADDRCONF],
|
|
* also create a new temporary address.
|
|
*/
|
|
read_unlock_bh(&in6_dev->lock);
|
|
ipv6_create_tempaddr(ifp, NULL);
|
|
} else {
|
|
read_unlock_bh(&in6_dev->lock);
|
|
}
|
|
#endif
|
|
in6_ifa_put(ifp);
|
|
addrconf_verify(0);
|
|
}
|
|
}
|
|
inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
|
|
in6_dev_put(in6_dev);
|
|
}
|
|
|
|
/*
|
|
* Set destination address.
|
|
* Special case for SIT interfaces where we create a new "virtual"
|
|
* device.
|
|
*/
|
|
int addrconf_set_dstaddr(void __user *arg)
|
|
{
|
|
struct in6_ifreq ireq;
|
|
struct net_device *dev;
|
|
int err = -EINVAL;
|
|
|
|
rtnl_lock();
|
|
|
|
err = -EFAULT;
|
|
if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
|
|
goto err_exit;
|
|
|
|
dev = __dev_get_by_index(&init_net, ireq.ifr6_ifindex);
|
|
|
|
err = -ENODEV;
|
|
if (dev == NULL)
|
|
goto err_exit;
|
|
|
|
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
|
|
if (dev->type == ARPHRD_SIT) {
|
|
struct ifreq ifr;
|
|
mm_segment_t oldfs;
|
|
struct ip_tunnel_parm p;
|
|
|
|
err = -EADDRNOTAVAIL;
|
|
if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
|
|
goto err_exit;
|
|
|
|
memset(&p, 0, sizeof(p));
|
|
p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
|
|
p.iph.saddr = 0;
|
|
p.iph.version = 4;
|
|
p.iph.ihl = 5;
|
|
p.iph.protocol = IPPROTO_IPV6;
|
|
p.iph.ttl = 64;
|
|
ifr.ifr_ifru.ifru_data = (void __user *)&p;
|
|
|
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
|
err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
|
|
set_fs(oldfs);
|
|
|
|
if (err == 0) {
|
|
err = -ENOBUFS;
|
|
if ((dev = __dev_get_by_name(&init_net, p.name)) == NULL)
|
|
goto err_exit;
|
|
err = dev_open(dev);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
err_exit:
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Manual configuration of address on an interface
|
|
*/
|
|
static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
|
|
__u8 ifa_flags, __u32 prefered_lft, __u32 valid_lft)
|
|
{
|
|
struct inet6_ifaddr *ifp;
|
|
struct inet6_dev *idev;
|
|
struct net_device *dev;
|
|
int scope;
|
|
u32 flags = RTF_EXPIRES;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/* check the lifetime */
|
|
if (!valid_lft || prefered_lft > valid_lft)
|
|
return -EINVAL;
|
|
|
|
if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
|
|
return -ENODEV;
|
|
|
|
if ((idev = addrconf_add_dev(dev)) == NULL)
|
|
return -ENOBUFS;
|
|
|
|
scope = ipv6_addr_scope(pfx);
|
|
|
|
if (valid_lft == INFINITY_LIFE_TIME) {
|
|
ifa_flags |= IFA_F_PERMANENT;
|
|
flags = 0;
|
|
} else if (valid_lft >= 0x7FFFFFFF/HZ)
|
|
valid_lft = 0x7FFFFFFF/HZ;
|
|
|
|
if (prefered_lft == 0)
|
|
ifa_flags |= IFA_F_DEPRECATED;
|
|
else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
|
|
(prefered_lft != INFINITY_LIFE_TIME))
|
|
prefered_lft = 0x7FFFFFFF/HZ;
|
|
|
|
ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
|
|
|
|
if (!IS_ERR(ifp)) {
|
|
spin_lock_bh(&ifp->lock);
|
|
ifp->valid_lft = valid_lft;
|
|
ifp->prefered_lft = prefered_lft;
|
|
ifp->tstamp = jiffies;
|
|
spin_unlock_bh(&ifp->lock);
|
|
|
|
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
|
|
jiffies_to_clock_t(valid_lft * HZ), flags);
|
|
/*
|
|
* Note that section 3.1 of RFC 4429 indicates
|
|
* that the Optimistic flag should not be set for
|
|
* manually configured addresses
|
|
*/
|
|
addrconf_dad_start(ifp, 0);
|
|
in6_ifa_put(ifp);
|
|
addrconf_verify(0);
|
|
return 0;
|
|
}
|
|
|
|
return PTR_ERR(ifp);
|
|
}
|
|
|
|
static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
|
|
{
|
|
struct inet6_ifaddr *ifp;
|
|
struct inet6_dev *idev;
|
|
struct net_device *dev;
|
|
|
|
if ((dev = __dev_get_by_index(&init_net, ifindex)) == NULL)
|
|
return -ENODEV;
|
|
|
|
if ((idev = __in6_dev_get(dev)) == NULL)
|
|
return -ENXIO;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
|
|
if (ifp->prefix_len == plen &&
|
|
ipv6_addr_equal(pfx, &ifp->addr)) {
|
|
in6_ifa_hold(ifp);
|
|
read_unlock_bh(&idev->lock);
|
|
|
|
ipv6_del_addr(ifp);
|
|
|
|
/* If the last address is deleted administratively,
|
|
disable IPv6 on this interface.
|
|
*/
|
|
if (idev->addr_list == NULL)
|
|
addrconf_ifdown(idev->dev, 1);
|
|
return 0;
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
|
|
|
|
int addrconf_add_ifaddr(void __user *arg)
|
|
{
|
|
struct in6_ifreq ireq;
|
|
int err;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
|
|
return -EFAULT;
|
|
|
|
rtnl_lock();
|
|
err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
|
|
IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
|
|
int addrconf_del_ifaddr(void __user *arg)
|
|
{
|
|
struct in6_ifreq ireq;
|
|
int err;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
|
|
return -EFAULT;
|
|
|
|
rtnl_lock();
|
|
err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
|
|
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
|
|
static void sit_add_v4_addrs(struct inet6_dev *idev)
|
|
{
|
|
struct inet6_ifaddr * ifp;
|
|
struct in6_addr addr;
|
|
struct net_device *dev;
|
|
int scope;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
memset(&addr, 0, sizeof(struct in6_addr));
|
|
memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
|
|
|
|
if (idev->dev->flags&IFF_POINTOPOINT) {
|
|
addr.s6_addr32[0] = htonl(0xfe800000);
|
|
scope = IFA_LINK;
|
|
} else {
|
|
scope = IPV6_ADDR_COMPATv4;
|
|
}
|
|
|
|
if (addr.s6_addr32[3]) {
|
|
ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
|
|
if (!IS_ERR(ifp)) {
|
|
spin_lock_bh(&ifp->lock);
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
|
spin_unlock_bh(&ifp->lock);
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
|
in6_ifa_put(ifp);
|
|
}
|
|
return;
|
|
}
|
|
|
|
for_each_netdev(&init_net, dev) {
|
|
struct in_device * in_dev = __in_dev_get_rtnl(dev);
|
|
if (in_dev && (dev->flags & IFF_UP)) {
|
|
struct in_ifaddr * ifa;
|
|
|
|
int flag = scope;
|
|
|
|
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
|
|
int plen;
|
|
|
|
addr.s6_addr32[3] = ifa->ifa_local;
|
|
|
|
if (ifa->ifa_scope == RT_SCOPE_LINK)
|
|
continue;
|
|
if (ifa->ifa_scope >= RT_SCOPE_HOST) {
|
|
if (idev->dev->flags&IFF_POINTOPOINT)
|
|
continue;
|
|
flag |= IFA_HOST;
|
|
}
|
|
if (idev->dev->flags&IFF_POINTOPOINT)
|
|
plen = 64;
|
|
else
|
|
plen = 96;
|
|
|
|
ifp = ipv6_add_addr(idev, &addr, plen, flag,
|
|
IFA_F_PERMANENT);
|
|
if (!IS_ERR(ifp)) {
|
|
spin_lock_bh(&ifp->lock);
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
|
spin_unlock_bh(&ifp->lock);
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
|
in6_ifa_put(ifp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void init_loopback(struct net_device *dev)
|
|
{
|
|
struct inet6_dev *idev;
|
|
struct inet6_ifaddr * ifp;
|
|
|
|
/* ::1 */
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if ((idev = ipv6_find_idev(dev)) == NULL) {
|
|
printk(KERN_DEBUG "init loopback: add_dev failed\n");
|
|
return;
|
|
}
|
|
|
|
ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
|
|
if (!IS_ERR(ifp)) {
|
|
spin_lock_bh(&ifp->lock);
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
|
spin_unlock_bh(&ifp->lock);
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
|
in6_ifa_put(ifp);
|
|
}
|
|
}
|
|
|
|
static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
|
|
{
|
|
struct inet6_ifaddr * ifp;
|
|
u32 addr_flags = IFA_F_PERMANENT;
|
|
|
|
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
|
|
if (idev->cnf.optimistic_dad &&
|
|
!ipv6_devconf.forwarding)
|
|
addr_flags |= IFA_F_OPTIMISTIC;
|
|
#endif
|
|
|
|
|
|
ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags);
|
|
if (!IS_ERR(ifp)) {
|
|
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
|
|
addrconf_dad_start(ifp, 0);
|
|
in6_ifa_put(ifp);
|
|
}
|
|
}
|
|
|
|
static void addrconf_dev_config(struct net_device *dev)
|
|
{
|
|
struct in6_addr addr;
|
|
struct inet6_dev * idev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if ((dev->type != ARPHRD_ETHER) &&
|
|
(dev->type != ARPHRD_FDDI) &&
|
|
(dev->type != ARPHRD_IEEE802_TR) &&
|
|
(dev->type != ARPHRD_ARCNET) &&
|
|
(dev->type != ARPHRD_INFINIBAND)) {
|
|
/* Alas, we support only Ethernet autoconfiguration. */
|
|
return;
|
|
}
|
|
|
|
idev = addrconf_add_dev(dev);
|
|
if (idev == NULL)
|
|
return;
|
|
|
|
memset(&addr, 0, sizeof(struct in6_addr));
|
|
addr.s6_addr32[0] = htonl(0xFE800000);
|
|
|
|
if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
|
|
addrconf_add_linklocal(idev, &addr);
|
|
}
|
|
|
|
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
|
|
static void addrconf_sit_config(struct net_device *dev)
|
|
{
|
|
struct inet6_dev *idev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/*
|
|
* Configure the tunnel with one of our IPv4
|
|
* addresses... we should configure all of
|
|
* our v4 addrs in the tunnel
|
|
*/
|
|
|
|
if ((idev = ipv6_find_idev(dev)) == NULL) {
|
|
printk(KERN_DEBUG "init sit: add_dev failed\n");
|
|
return;
|
|
}
|
|
|
|
sit_add_v4_addrs(idev);
|
|
|
|
if (dev->flags&IFF_POINTOPOINT) {
|
|
addrconf_add_mroute(dev);
|
|
addrconf_add_lroute(dev);
|
|
} else
|
|
sit_route_add(dev);
|
|
}
|
|
#endif
|
|
|
|
static inline int
|
|
ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
|
|
{
|
|
struct in6_addr lladdr;
|
|
|
|
if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
|
|
addrconf_add_linklocal(idev, &lladdr);
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
|
|
{
|
|
struct net_device *link_dev;
|
|
|
|
/* first try to inherit the link-local address from the link device */
|
|
if (idev->dev->iflink &&
|
|
(link_dev = __dev_get_by_index(&init_net, idev->dev->iflink))) {
|
|
if (!ipv6_inherit_linklocal(idev, link_dev))
|
|
return;
|
|
}
|
|
/* then try to inherit it from any device */
|
|
for_each_netdev(&init_net, link_dev) {
|
|
if (!ipv6_inherit_linklocal(idev, link_dev))
|
|
return;
|
|
}
|
|
printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
|
|
}
|
|
|
|
/*
|
|
* Autoconfigure tunnel with a link-local address so routing protocols,
|
|
* DHCPv6, MLD etc. can be run over the virtual link
|
|
*/
|
|
|
|
static void addrconf_ip6_tnl_config(struct net_device *dev)
|
|
{
|
|
struct inet6_dev *idev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if ((idev = addrconf_add_dev(dev)) == NULL) {
|
|
printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
|
|
return;
|
|
}
|
|
ip6_tnl_add_linklocal(idev);
|
|
}
|
|
|
|
static int addrconf_notify(struct notifier_block *this, unsigned long event,
|
|
void * data)
|
|
{
|
|
struct net_device *dev = (struct net_device *) data;
|
|
struct inet6_dev *idev = __in6_dev_get(dev);
|
|
int run_pending = 0;
|
|
int err;
|
|
|
|
if (dev->nd_net != &init_net)
|
|
return NOTIFY_DONE;
|
|
|
|
switch(event) {
|
|
case NETDEV_REGISTER:
|
|
if (!idev && dev->mtu >= IPV6_MIN_MTU) {
|
|
idev = ipv6_add_dev(dev);
|
|
if (!idev)
|
|
return notifier_from_errno(-ENOMEM);
|
|
}
|
|
break;
|
|
case NETDEV_UP:
|
|
case NETDEV_CHANGE:
|
|
if (dev->flags & IFF_SLAVE)
|
|
break;
|
|
|
|
if (event == NETDEV_UP) {
|
|
if (!addrconf_qdisc_ok(dev)) {
|
|
/* device is not ready yet. */
|
|
printk(KERN_INFO
|
|
"ADDRCONF(NETDEV_UP): %s: "
|
|
"link is not ready\n",
|
|
dev->name);
|
|
break;
|
|
}
|
|
|
|
if (!idev && dev->mtu >= IPV6_MIN_MTU)
|
|
idev = ipv6_add_dev(dev);
|
|
|
|
if (idev)
|
|
idev->if_flags |= IF_READY;
|
|
} else {
|
|
if (!addrconf_qdisc_ok(dev)) {
|
|
/* device is still not ready. */
|
|
break;
|
|
}
|
|
|
|
if (idev) {
|
|
if (idev->if_flags & IF_READY) {
|
|
/* device is already configured. */
|
|
break;
|
|
}
|
|
idev->if_flags |= IF_READY;
|
|
}
|
|
|
|
printk(KERN_INFO
|
|
"ADDRCONF(NETDEV_CHANGE): %s: "
|
|
"link becomes ready\n",
|
|
dev->name);
|
|
|
|
run_pending = 1;
|
|
}
|
|
|
|
switch(dev->type) {
|
|
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
|
|
case ARPHRD_SIT:
|
|
addrconf_sit_config(dev);
|
|
break;
|
|
#endif
|
|
case ARPHRD_TUNNEL6:
|
|
addrconf_ip6_tnl_config(dev);
|
|
break;
|
|
case ARPHRD_LOOPBACK:
|
|
init_loopback(dev);
|
|
break;
|
|
|
|
default:
|
|
addrconf_dev_config(dev);
|
|
break;
|
|
}
|
|
if (idev) {
|
|
if (run_pending)
|
|
addrconf_dad_run(idev);
|
|
|
|
/* If the MTU changed during the interface down, when the
|
|
interface up, the changed MTU must be reflected in the
|
|
idev as well as routers.
|
|
*/
|
|
if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
|
|
rt6_mtu_change(dev, dev->mtu);
|
|
idev->cnf.mtu6 = dev->mtu;
|
|
}
|
|
idev->tstamp = jiffies;
|
|
inet6_ifinfo_notify(RTM_NEWLINK, idev);
|
|
/* If the changed mtu during down is lower than IPV6_MIN_MTU
|
|
stop IPv6 on this interface.
|
|
*/
|
|
if (dev->mtu < IPV6_MIN_MTU)
|
|
addrconf_ifdown(dev, event != NETDEV_DOWN);
|
|
}
|
|
break;
|
|
|
|
case NETDEV_CHANGEMTU:
|
|
if (idev && dev->mtu >= IPV6_MIN_MTU) {
|
|
rt6_mtu_change(dev, dev->mtu);
|
|
idev->cnf.mtu6 = dev->mtu;
|
|
break;
|
|
}
|
|
|
|
if (!idev && dev->mtu >= IPV6_MIN_MTU) {
|
|
idev = ipv6_add_dev(dev);
|
|
if (idev)
|
|
break;
|
|
}
|
|
|
|
/* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
|
|
|
|
case NETDEV_DOWN:
|
|
case NETDEV_UNREGISTER:
|
|
/*
|
|
* Remove all addresses from this interface.
|
|
*/
|
|
addrconf_ifdown(dev, event != NETDEV_DOWN);
|
|
break;
|
|
|
|
case NETDEV_CHANGENAME:
|
|
if (idev) {
|
|
snmp6_unregister_dev(idev);
|
|
#ifdef CONFIG_SYSCTL
|
|
addrconf_sysctl_unregister(&idev->cnf);
|
|
neigh_sysctl_unregister(idev->nd_parms);
|
|
neigh_sysctl_register(dev, idev->nd_parms,
|
|
NET_IPV6, NET_IPV6_NEIGH, "ipv6",
|
|
&ndisc_ifinfo_sysctl_change,
|
|
NULL);
|
|
addrconf_sysctl_register(idev, &idev->cnf);
|
|
#endif
|
|
err = snmp6_register_dev(idev);
|
|
if (err)
|
|
return notifier_from_errno(err);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
/*
|
|
* addrconf module should be notified of a device going up
|
|
*/
|
|
static struct notifier_block ipv6_dev_notf = {
|
|
.notifier_call = addrconf_notify,
|
|
.priority = 0
|
|
};
|
|
|
|
static int addrconf_ifdown(struct net_device *dev, int how)
|
|
{
|
|
struct inet6_dev *idev;
|
|
struct inet6_ifaddr *ifa, **bifa;
|
|
int i;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (dev == init_net.loopback_dev && how == 1)
|
|
how = 0;
|
|
|
|
rt6_ifdown(dev);
|
|
neigh_ifdown(&nd_tbl, dev);
|
|
|
|
idev = __in6_dev_get(dev);
|
|
if (idev == NULL)
|
|
return -ENODEV;
|
|
|
|
/* Step 1: remove reference to ipv6 device from parent device.
|
|
Do not dev_put!
|
|
*/
|
|
if (how == 1) {
|
|
idev->dead = 1;
|
|
|
|
/* protected by rtnl_lock */
|
|
rcu_assign_pointer(dev->ip6_ptr, NULL);
|
|
|
|
/* Step 1.5: remove snmp6 entry */
|
|
snmp6_unregister_dev(idev);
|
|
|
|
}
|
|
|
|
/* Step 2: clear hash table */
|
|
for (i=0; i<IN6_ADDR_HSIZE; i++) {
|
|
bifa = &inet6_addr_lst[i];
|
|
|
|
write_lock_bh(&addrconf_hash_lock);
|
|
while ((ifa = *bifa) != NULL) {
|
|
if (ifa->idev == idev) {
|
|
*bifa = ifa->lst_next;
|
|
ifa->lst_next = NULL;
|
|
addrconf_del_timer(ifa);
|
|
in6_ifa_put(ifa);
|
|
continue;
|
|
}
|
|
bifa = &ifa->lst_next;
|
|
}
|
|
write_unlock_bh(&addrconf_hash_lock);
|
|
}
|
|
|
|
write_lock_bh(&idev->lock);
|
|
|
|
/* Step 3: clear flags for stateless addrconf */
|
|
if (how != 1)
|
|
idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
|
|
|
|
/* Step 4: clear address list */
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
if (how == 1 && del_timer(&idev->regen_timer))
|
|
in6_dev_put(idev);
|
|
|
|
/* clear tempaddr list */
|
|
while ((ifa = idev->tempaddr_list) != NULL) {
|
|
idev->tempaddr_list = ifa->tmp_next;
|
|
ifa->tmp_next = NULL;
|
|
ifa->dead = 1;
|
|
write_unlock_bh(&idev->lock);
|
|
spin_lock_bh(&ifa->lock);
|
|
|
|
if (ifa->ifpub) {
|
|
in6_ifa_put(ifa->ifpub);
|
|
ifa->ifpub = NULL;
|
|
}
|
|
spin_unlock_bh(&ifa->lock);
|
|
in6_ifa_put(ifa);
|
|
write_lock_bh(&idev->lock);
|
|
}
|
|
#endif
|
|
while ((ifa = idev->addr_list) != NULL) {
|
|
idev->addr_list = ifa->if_next;
|
|
ifa->if_next = NULL;
|
|
ifa->dead = 1;
|
|
addrconf_del_timer(ifa);
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
__ipv6_ifa_notify(RTM_DELADDR, ifa);
|
|
atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
|
|
in6_ifa_put(ifa);
|
|
|
|
write_lock_bh(&idev->lock);
|
|
}
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
/* Step 5: Discard multicast list */
|
|
|
|
if (how == 1)
|
|
ipv6_mc_destroy_dev(idev);
|
|
else
|
|
ipv6_mc_down(idev);
|
|
|
|
idev->tstamp = jiffies;
|
|
|
|
/* Shot the device (if unregistered) */
|
|
|
|
if (how == 1) {
|
|
#ifdef CONFIG_SYSCTL
|
|
addrconf_sysctl_unregister(&idev->cnf);
|
|
neigh_sysctl_unregister(idev->nd_parms);
|
|
#endif
|
|
neigh_parms_release(&nd_tbl, idev->nd_parms);
|
|
neigh_ifdown(&nd_tbl, dev);
|
|
in6_dev_put(idev);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void addrconf_rs_timer(unsigned long data)
|
|
{
|
|
struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
|
|
|
|
if (ifp->idev->cnf.forwarding)
|
|
goto out;
|
|
|
|
if (ifp->idev->if_flags & IF_RA_RCVD) {
|
|
/*
|
|
* Announcement received after solicitation
|
|
* was sent
|
|
*/
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&ifp->lock);
|
|
if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
|
|
struct in6_addr all_routers;
|
|
|
|
/* The wait after the last probe can be shorter */
|
|
addrconf_mod_timer(ifp, AC_RS,
|
|
(ifp->probes == ifp->idev->cnf.rtr_solicits) ?
|
|
ifp->idev->cnf.rtr_solicit_delay :
|
|
ifp->idev->cnf.rtr_solicit_interval);
|
|
spin_unlock(&ifp->lock);
|
|
|
|
ipv6_addr_all_routers(&all_routers);
|
|
|
|
ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
|
|
} else {
|
|
spin_unlock(&ifp->lock);
|
|
/*
|
|
* Note: we do not support deprecated "all on-link"
|
|
* assumption any longer.
|
|
*/
|
|
printk(KERN_DEBUG "%s: no IPv6 routers present\n",
|
|
ifp->idev->dev->name);
|
|
}
|
|
|
|
out:
|
|
in6_ifa_put(ifp);
|
|
}
|
|
|
|
/*
|
|
* Duplicate Address Detection
|
|
*/
|
|
static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
|
|
{
|
|
unsigned long rand_num;
|
|
struct inet6_dev *idev = ifp->idev;
|
|
|
|
if (ifp->flags & IFA_F_OPTIMISTIC)
|
|
rand_num = 0;
|
|
else
|
|
rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
|
|
|
|
ifp->probes = idev->cnf.dad_transmits;
|
|
addrconf_mod_timer(ifp, AC_DAD, rand_num);
|
|
}
|
|
|
|
static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
|
|
{
|
|
struct inet6_dev *idev = ifp->idev;
|
|
struct net_device *dev = idev->dev;
|
|
|
|
addrconf_join_solict(dev, &ifp->addr);
|
|
|
|
net_srandom(ifp->addr.s6_addr32[3]);
|
|
|
|
read_lock_bh(&idev->lock);
|
|
if (ifp->dead)
|
|
goto out;
|
|
spin_lock_bh(&ifp->lock);
|
|
|
|
if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
|
|
!(ifp->flags&IFA_F_TENTATIVE) ||
|
|
ifp->flags & IFA_F_NODAD) {
|
|
ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
|
|
spin_unlock_bh(&ifp->lock);
|
|
read_unlock_bh(&idev->lock);
|
|
|
|
addrconf_dad_completed(ifp);
|
|
return;
|
|
}
|
|
|
|
if (!(idev->if_flags & IF_READY)) {
|
|
spin_unlock_bh(&ifp->lock);
|
|
read_unlock_bh(&idev->lock);
|
|
/*
|
|
* If the defice is not ready:
|
|
* - keep it tentative if it is a permanent address.
|
|
* - otherwise, kill it.
|
|
*/
|
|
in6_ifa_hold(ifp);
|
|
addrconf_dad_stop(ifp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Optimistic nodes can start receiving
|
|
* Frames right away
|
|
*/
|
|
if(ifp->flags & IFA_F_OPTIMISTIC)
|
|
ip6_ins_rt(ifp->rt);
|
|
|
|
addrconf_dad_kick(ifp);
|
|
spin_unlock_bh(&ifp->lock);
|
|
out:
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
|
|
static void addrconf_dad_timer(unsigned long data)
|
|
{
|
|
struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
|
|
struct inet6_dev *idev = ifp->idev;
|
|
struct in6_addr unspec;
|
|
struct in6_addr mcaddr;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
if (idev->dead) {
|
|
read_unlock_bh(&idev->lock);
|
|
goto out;
|
|
}
|
|
spin_lock_bh(&ifp->lock);
|
|
if (ifp->probes == 0) {
|
|
/*
|
|
* DAD was successful
|
|
*/
|
|
|
|
ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
|
|
spin_unlock_bh(&ifp->lock);
|
|
read_unlock_bh(&idev->lock);
|
|
|
|
addrconf_dad_completed(ifp);
|
|
|
|
goto out;
|
|
}
|
|
|
|
ifp->probes--;
|
|
addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
|
|
spin_unlock_bh(&ifp->lock);
|
|
read_unlock_bh(&idev->lock);
|
|
|
|
/* send a neighbour solicitation for our addr */
|
|
memset(&unspec, 0, sizeof(unspec));
|
|
addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
|
|
ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
|
|
out:
|
|
in6_ifa_put(ifp);
|
|
}
|
|
|
|
static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
|
|
{
|
|
struct net_device * dev = ifp->idev->dev;
|
|
|
|
/*
|
|
* Configure the address for reception. Now it is valid.
|
|
*/
|
|
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
|
|
|
/* If added prefix is link local and forwarding is off,
|
|
start sending router solicitations.
|
|
*/
|
|
|
|
if (ifp->idev->cnf.forwarding == 0 &&
|
|
ifp->idev->cnf.rtr_solicits > 0 &&
|
|
(dev->flags&IFF_LOOPBACK) == 0 &&
|
|
(ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
|
|
struct in6_addr all_routers;
|
|
|
|
ipv6_addr_all_routers(&all_routers);
|
|
|
|
/*
|
|
* If a host as already performed a random delay
|
|
* [...] as part of DAD [...] there is no need
|
|
* to delay again before sending the first RS
|
|
*/
|
|
ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
|
|
|
|
spin_lock_bh(&ifp->lock);
|
|
ifp->probes = 1;
|
|
ifp->idev->if_flags |= IF_RS_SENT;
|
|
addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
|
|
spin_unlock_bh(&ifp->lock);
|
|
}
|
|
}
|
|
|
|
static void addrconf_dad_run(struct inet6_dev *idev) {
|
|
struct inet6_ifaddr *ifp;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
|
|
spin_lock_bh(&ifp->lock);
|
|
if (!(ifp->flags & IFA_F_TENTATIVE)) {
|
|
spin_unlock_bh(&ifp->lock);
|
|
continue;
|
|
}
|
|
spin_unlock_bh(&ifp->lock);
|
|
addrconf_dad_kick(ifp);
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
struct if6_iter_state {
|
|
int bucket;
|
|
};
|
|
|
|
static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
|
|
{
|
|
struct inet6_ifaddr *ifa = NULL;
|
|
struct if6_iter_state *state = seq->private;
|
|
|
|
for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
|
|
ifa = inet6_addr_lst[state->bucket];
|
|
if (ifa)
|
|
break;
|
|
}
|
|
return ifa;
|
|
}
|
|
|
|
static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
|
|
{
|
|
struct if6_iter_state *state = seq->private;
|
|
|
|
ifa = ifa->lst_next;
|
|
try_again:
|
|
if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
|
|
ifa = inet6_addr_lst[state->bucket];
|
|
goto try_again;
|
|
}
|
|
return ifa;
|
|
}
|
|
|
|
static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct inet6_ifaddr *ifa = if6_get_first(seq);
|
|
|
|
if (ifa)
|
|
while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
|
|
--pos;
|
|
return pos ? NULL : ifa;
|
|
}
|
|
|
|
static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
read_lock_bh(&addrconf_hash_lock);
|
|
return if6_get_idx(seq, *pos);
|
|
}
|
|
|
|
static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct inet6_ifaddr *ifa;
|
|
|
|
ifa = if6_get_next(seq, v);
|
|
++*pos;
|
|
return ifa;
|
|
}
|
|
|
|
static void if6_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
read_unlock_bh(&addrconf_hash_lock);
|
|
}
|
|
|
|
static int if6_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
|
|
seq_printf(seq,
|
|
NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
|
|
NIP6(ifp->addr),
|
|
ifp->idev->dev->ifindex,
|
|
ifp->prefix_len,
|
|
ifp->scope,
|
|
ifp->flags,
|
|
ifp->idev->dev->name);
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations if6_seq_ops = {
|
|
.start = if6_seq_start,
|
|
.next = if6_seq_next,
|
|
.show = if6_seq_show,
|
|
.stop = if6_seq_stop,
|
|
};
|
|
|
|
static int if6_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
return seq_open_private(file, &if6_seq_ops,
|
|
sizeof(struct if6_iter_state));
|
|
}
|
|
|
|
static const struct file_operations if6_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = if6_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
|
|
int __init if6_proc_init(void)
|
|
{
|
|
if (!proc_net_fops_create(&init_net, "if_inet6", S_IRUGO, &if6_fops))
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void if6_proc_exit(void)
|
|
{
|
|
proc_net_remove(&init_net, "if_inet6");
|
|
}
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
|
|
/* Check if address is a home address configured on any interface. */
|
|
int ipv6_chk_home_addr(struct in6_addr *addr)
|
|
{
|
|
int ret = 0;
|
|
struct inet6_ifaddr * ifp;
|
|
u8 hash = ipv6_addr_hash(addr);
|
|
read_lock_bh(&addrconf_hash_lock);
|
|
for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
|
|
if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
|
|
(ifp->flags & IFA_F_HOMEADDRESS)) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&addrconf_hash_lock);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Periodic address status verification
|
|
*/
|
|
|
|
static void addrconf_verify(unsigned long foo)
|
|
{
|
|
struct inet6_ifaddr *ifp;
|
|
unsigned long now, next;
|
|
int i;
|
|
|
|
spin_lock_bh(&addrconf_verify_lock);
|
|
now = jiffies;
|
|
next = now + ADDR_CHECK_FREQUENCY;
|
|
|
|
del_timer(&addr_chk_timer);
|
|
|
|
for (i=0; i < IN6_ADDR_HSIZE; i++) {
|
|
|
|
restart:
|
|
read_lock(&addrconf_hash_lock);
|
|
for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
|
|
unsigned long age;
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
unsigned long regen_advance;
|
|
#endif
|
|
|
|
if (ifp->flags & IFA_F_PERMANENT)
|
|
continue;
|
|
|
|
spin_lock(&ifp->lock);
|
|
age = (now - ifp->tstamp) / HZ;
|
|
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
regen_advance = ifp->idev->cnf.regen_max_retry *
|
|
ifp->idev->cnf.dad_transmits *
|
|
ifp->idev->nd_parms->retrans_time / HZ;
|
|
#endif
|
|
|
|
if (ifp->valid_lft != INFINITY_LIFE_TIME &&
|
|
age >= ifp->valid_lft) {
|
|
spin_unlock(&ifp->lock);
|
|
in6_ifa_hold(ifp);
|
|
read_unlock(&addrconf_hash_lock);
|
|
ipv6_del_addr(ifp);
|
|
goto restart;
|
|
} else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
|
|
spin_unlock(&ifp->lock);
|
|
continue;
|
|
} else if (age >= ifp->prefered_lft) {
|
|
/* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
|
|
int deprecate = 0;
|
|
|
|
if (!(ifp->flags&IFA_F_DEPRECATED)) {
|
|
deprecate = 1;
|
|
ifp->flags |= IFA_F_DEPRECATED;
|
|
}
|
|
|
|
if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
|
|
next = ifp->tstamp + ifp->valid_lft * HZ;
|
|
|
|
spin_unlock(&ifp->lock);
|
|
|
|
if (deprecate) {
|
|
in6_ifa_hold(ifp);
|
|
read_unlock(&addrconf_hash_lock);
|
|
|
|
ipv6_ifa_notify(0, ifp);
|
|
in6_ifa_put(ifp);
|
|
goto restart;
|
|
}
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
} else if ((ifp->flags&IFA_F_TEMPORARY) &&
|
|
!(ifp->flags&IFA_F_TENTATIVE)) {
|
|
if (age >= ifp->prefered_lft - regen_advance) {
|
|
struct inet6_ifaddr *ifpub = ifp->ifpub;
|
|
if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
|
|
next = ifp->tstamp + ifp->prefered_lft * HZ;
|
|
if (!ifp->regen_count && ifpub) {
|
|
ifp->regen_count++;
|
|
in6_ifa_hold(ifp);
|
|
in6_ifa_hold(ifpub);
|
|
spin_unlock(&ifp->lock);
|
|
read_unlock(&addrconf_hash_lock);
|
|
spin_lock(&ifpub->lock);
|
|
ifpub->regen_count = 0;
|
|
spin_unlock(&ifpub->lock);
|
|
ipv6_create_tempaddr(ifpub, ifp);
|
|
in6_ifa_put(ifpub);
|
|
in6_ifa_put(ifp);
|
|
goto restart;
|
|
}
|
|
} else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
|
|
next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
|
|
spin_unlock(&ifp->lock);
|
|
#endif
|
|
} else {
|
|
/* ifp->prefered_lft <= ifp->valid_lft */
|
|
if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
|
|
next = ifp->tstamp + ifp->prefered_lft * HZ;
|
|
spin_unlock(&ifp->lock);
|
|
}
|
|
}
|
|
read_unlock(&addrconf_hash_lock);
|
|
}
|
|
|
|
addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
|
|
add_timer(&addr_chk_timer);
|
|
spin_unlock_bh(&addrconf_verify_lock);
|
|
}
|
|
|
|
static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
|
|
{
|
|
struct in6_addr *pfx = NULL;
|
|
|
|
if (addr)
|
|
pfx = nla_data(addr);
|
|
|
|
if (local) {
|
|
if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
|
|
pfx = NULL;
|
|
else
|
|
pfx = nla_data(local);
|
|
}
|
|
|
|
return pfx;
|
|
}
|
|
|
|
static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
|
|
[IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
|
|
[IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
|
|
[IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
|
|
};
|
|
|
|
static int
|
|
inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct ifaddrmsg *ifm;
|
|
struct nlattr *tb[IFA_MAX+1];
|
|
struct in6_addr *pfx;
|
|
int err;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
|
|
if (pfx == NULL)
|
|
return -EINVAL;
|
|
|
|
return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
|
|
}
|
|
|
|
static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
|
|
u32 prefered_lft, u32 valid_lft)
|
|
{
|
|
u32 flags = RTF_EXPIRES;
|
|
|
|
if (!valid_lft || (prefered_lft > valid_lft))
|
|
return -EINVAL;
|
|
|
|
if (valid_lft == INFINITY_LIFE_TIME) {
|
|
ifa_flags |= IFA_F_PERMANENT;
|
|
flags = 0;
|
|
} else if (valid_lft >= 0x7FFFFFFF/HZ)
|
|
valid_lft = 0x7FFFFFFF/HZ;
|
|
|
|
if (prefered_lft == 0)
|
|
ifa_flags |= IFA_F_DEPRECATED;
|
|
else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
|
|
(prefered_lft != INFINITY_LIFE_TIME))
|
|
prefered_lft = 0x7FFFFFFF/HZ;
|
|
|
|
spin_lock_bh(&ifp->lock);
|
|
ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
|
|
ifp->tstamp = jiffies;
|
|
ifp->valid_lft = valid_lft;
|
|
ifp->prefered_lft = prefered_lft;
|
|
|
|
spin_unlock_bh(&ifp->lock);
|
|
if (!(ifp->flags&IFA_F_TENTATIVE))
|
|
ipv6_ifa_notify(0, ifp);
|
|
|
|
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
|
|
jiffies_to_clock_t(valid_lft * HZ), flags);
|
|
addrconf_verify(0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct ifaddrmsg *ifm;
|
|
struct nlattr *tb[IFA_MAX+1];
|
|
struct in6_addr *pfx;
|
|
struct inet6_ifaddr *ifa;
|
|
struct net_device *dev;
|
|
u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
|
|
u8 ifa_flags;
|
|
int err;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
|
|
if (pfx == NULL)
|
|
return -EINVAL;
|
|
|
|
if (tb[IFA_CACHEINFO]) {
|
|
struct ifa_cacheinfo *ci;
|
|
|
|
ci = nla_data(tb[IFA_CACHEINFO]);
|
|
valid_lft = ci->ifa_valid;
|
|
preferred_lft = ci->ifa_prefered;
|
|
} else {
|
|
preferred_lft = INFINITY_LIFE_TIME;
|
|
valid_lft = INFINITY_LIFE_TIME;
|
|
}
|
|
|
|
dev = __dev_get_by_index(&init_net, ifm->ifa_index);
|
|
if (dev == NULL)
|
|
return -ENODEV;
|
|
|
|
/* We ignore other flags so far. */
|
|
ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
|
|
|
|
ifa = ipv6_get_ifaddr(pfx, dev, 1);
|
|
if (ifa == NULL) {
|
|
/*
|
|
* It would be best to check for !NLM_F_CREATE here but
|
|
* userspace alreay relies on not having to provide this.
|
|
*/
|
|
return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
|
|
ifa_flags, preferred_lft, valid_lft);
|
|
}
|
|
|
|
if (nlh->nlmsg_flags & NLM_F_EXCL ||
|
|
!(nlh->nlmsg_flags & NLM_F_REPLACE))
|
|
err = -EEXIST;
|
|
else
|
|
err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
|
|
|
|
in6_ifa_put(ifa);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
|
|
u8 scope, int ifindex)
|
|
{
|
|
struct ifaddrmsg *ifm;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
ifm->ifa_family = AF_INET6;
|
|
ifm->ifa_prefixlen = prefixlen;
|
|
ifm->ifa_flags = flags;
|
|
ifm->ifa_scope = scope;
|
|
ifm->ifa_index = ifindex;
|
|
}
|
|
|
|
static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
|
|
unsigned long tstamp, u32 preferred, u32 valid)
|
|
{
|
|
struct ifa_cacheinfo ci;
|
|
|
|
ci.cstamp = (u32)(TIME_DELTA(cstamp, INITIAL_JIFFIES) / HZ * 100
|
|
+ TIME_DELTA(cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
|
|
ci.tstamp = (u32)(TIME_DELTA(tstamp, INITIAL_JIFFIES) / HZ * 100
|
|
+ TIME_DELTA(tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
|
|
ci.ifa_prefered = preferred;
|
|
ci.ifa_valid = valid;
|
|
|
|
return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
|
|
}
|
|
|
|
static inline int rt_scope(int ifa_scope)
|
|
{
|
|
if (ifa_scope & IFA_HOST)
|
|
return RT_SCOPE_HOST;
|
|
else if (ifa_scope & IFA_LINK)
|
|
return RT_SCOPE_LINK;
|
|
else if (ifa_scope & IFA_SITE)
|
|
return RT_SCOPE_SITE;
|
|
else
|
|
return RT_SCOPE_UNIVERSE;
|
|
}
|
|
|
|
static inline int inet6_ifaddr_msgsize(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
|
|
+ nla_total_size(16) /* IFA_ADDRESS */
|
|
+ nla_total_size(sizeof(struct ifa_cacheinfo));
|
|
}
|
|
|
|
static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
|
|
u32 pid, u32 seq, int event, unsigned int flags)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
u32 preferred, valid;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
|
|
ifa->idev->dev->ifindex);
|
|
|
|
if (!(ifa->flags&IFA_F_PERMANENT)) {
|
|
preferred = ifa->prefered_lft;
|
|
valid = ifa->valid_lft;
|
|
if (preferred != INFINITY_LIFE_TIME) {
|
|
long tval = (jiffies - ifa->tstamp)/HZ;
|
|
preferred -= tval;
|
|
if (valid != INFINITY_LIFE_TIME)
|
|
valid -= tval;
|
|
}
|
|
} else {
|
|
preferred = INFINITY_LIFE_TIME;
|
|
valid = INFINITY_LIFE_TIME;
|
|
}
|
|
|
|
if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
|
|
put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
}
|
|
|
|
static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
|
|
u32 pid, u32 seq, int event, u16 flags)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
u8 scope = RT_SCOPE_UNIVERSE;
|
|
int ifindex = ifmca->idev->dev->ifindex;
|
|
|
|
if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
|
|
scope = RT_SCOPE_SITE;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
|
|
if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
|
|
put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
|
|
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
}
|
|
|
|
static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
|
|
u32 pid, u32 seq, int event, unsigned int flags)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
u8 scope = RT_SCOPE_UNIVERSE;
|
|
int ifindex = ifaca->aca_idev->dev->ifindex;
|
|
|
|
if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
|
|
scope = RT_SCOPE_SITE;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
|
|
if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
|
|
put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
|
|
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
}
|
|
|
|
enum addr_type_t
|
|
{
|
|
UNICAST_ADDR,
|
|
MULTICAST_ADDR,
|
|
ANYCAST_ADDR,
|
|
};
|
|
|
|
static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
|
|
enum addr_type_t type)
|
|
{
|
|
int idx, ip_idx;
|
|
int s_idx, s_ip_idx;
|
|
int err = 1;
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev = NULL;
|
|
struct inet6_ifaddr *ifa;
|
|
struct ifmcaddr6 *ifmca;
|
|
struct ifacaddr6 *ifaca;
|
|
|
|
s_idx = cb->args[0];
|
|
s_ip_idx = ip_idx = cb->args[1];
|
|
|
|
idx = 0;
|
|
for_each_netdev(&init_net, dev) {
|
|
if (idx < s_idx)
|
|
goto cont;
|
|
if (idx > s_idx)
|
|
s_ip_idx = 0;
|
|
ip_idx = 0;
|
|
if ((idev = in6_dev_get(dev)) == NULL)
|
|
goto cont;
|
|
read_lock_bh(&idev->lock);
|
|
switch (type) {
|
|
case UNICAST_ADDR:
|
|
/* unicast address incl. temp addr */
|
|
for (ifa = idev->addr_list; ifa;
|
|
ifa = ifa->if_next, ip_idx++) {
|
|
if (ip_idx < s_ip_idx)
|
|
continue;
|
|
if ((err = inet6_fill_ifaddr(skb, ifa,
|
|
NETLINK_CB(cb->skb).pid,
|
|
cb->nlh->nlmsg_seq, RTM_NEWADDR,
|
|
NLM_F_MULTI)) <= 0)
|
|
goto done;
|
|
}
|
|
break;
|
|
case MULTICAST_ADDR:
|
|
/* multicast address */
|
|
for (ifmca = idev->mc_list; ifmca;
|
|
ifmca = ifmca->next, ip_idx++) {
|
|
if (ip_idx < s_ip_idx)
|
|
continue;
|
|
if ((err = inet6_fill_ifmcaddr(skb, ifmca,
|
|
NETLINK_CB(cb->skb).pid,
|
|
cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
|
|
NLM_F_MULTI)) <= 0)
|
|
goto done;
|
|
}
|
|
break;
|
|
case ANYCAST_ADDR:
|
|
/* anycast address */
|
|
for (ifaca = idev->ac_list; ifaca;
|
|
ifaca = ifaca->aca_next, ip_idx++) {
|
|
if (ip_idx < s_ip_idx)
|
|
continue;
|
|
if ((err = inet6_fill_ifacaddr(skb, ifaca,
|
|
NETLINK_CB(cb->skb).pid,
|
|
cb->nlh->nlmsg_seq, RTM_GETANYCAST,
|
|
NLM_F_MULTI)) <= 0)
|
|
goto done;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
cont:
|
|
idx++;
|
|
}
|
|
done:
|
|
if (err <= 0) {
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
}
|
|
cb->args[0] = idx;
|
|
cb->args[1] = ip_idx;
|
|
return skb->len;
|
|
}
|
|
|
|
static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
enum addr_type_t type = UNICAST_ADDR;
|
|
return inet6_dump_addr(skb, cb, type);
|
|
}
|
|
|
|
static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
enum addr_type_t type = MULTICAST_ADDR;
|
|
return inet6_dump_addr(skb, cb, type);
|
|
}
|
|
|
|
|
|
static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
enum addr_type_t type = ANYCAST_ADDR;
|
|
return inet6_dump_addr(skb, cb, type);
|
|
}
|
|
|
|
static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
|
|
void *arg)
|
|
{
|
|
struct ifaddrmsg *ifm;
|
|
struct nlattr *tb[IFA_MAX+1];
|
|
struct in6_addr *addr = NULL;
|
|
struct net_device *dev = NULL;
|
|
struct inet6_ifaddr *ifa;
|
|
struct sk_buff *skb;
|
|
int err;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
|
|
if (addr == NULL) {
|
|
err = -EINVAL;
|
|
goto errout;
|
|
}
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifa_index)
|
|
dev = __dev_get_by_index(&init_net, ifm->ifa_index);
|
|
|
|
if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL) {
|
|
err = -EADDRNOTAVAIL;
|
|
goto errout;
|
|
}
|
|
|
|
if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {
|
|
err = -ENOBUFS;
|
|
goto errout_ifa;
|
|
}
|
|
|
|
err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,
|
|
nlh->nlmsg_seq, RTM_NEWADDR, 0);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
goto errout_ifa;
|
|
}
|
|
err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
|
|
errout_ifa:
|
|
in6_ifa_put(ifa);
|
|
errout:
|
|
return err;
|
|
}
|
|
|
|
static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
|
|
{
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
|
|
skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
goto errout;
|
|
|
|
err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
|
|
errout:
|
|
if (err < 0)
|
|
rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
|
|
}
|
|
|
|
static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
|
|
__s32 *array, int bytes)
|
|
{
|
|
BUG_ON(bytes < (DEVCONF_MAX * 4));
|
|
|
|
memset(array, 0, bytes);
|
|
array[DEVCONF_FORWARDING] = cnf->forwarding;
|
|
array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
|
|
array[DEVCONF_MTU6] = cnf->mtu6;
|
|
array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
|
|
array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
|
|
array[DEVCONF_AUTOCONF] = cnf->autoconf;
|
|
array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
|
|
array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
|
|
array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
|
|
array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
|
|
array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
|
|
array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
|
|
array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
|
|
array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
|
|
array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
|
|
#endif
|
|
array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
|
|
array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
|
|
array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
|
|
#ifdef CONFIG_IPV6_ROUTER_PREF
|
|
array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
|
|
array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
|
|
#ifdef CONFIG_IPV6_ROUTE_INFO
|
|
array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
|
|
#endif
|
|
#endif
|
|
array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
|
|
array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
|
|
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
|
|
array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
|
|
#endif
|
|
}
|
|
|
|
static inline size_t inet6_if_nlmsg_size(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ifinfomsg))
|
|
+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
|
|
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
|
|
+ nla_total_size(4) /* IFLA_MTU */
|
|
+ nla_total_size(4) /* IFLA_LINK */
|
|
+ nla_total_size( /* IFLA_PROTINFO */
|
|
nla_total_size(4) /* IFLA_INET6_FLAGS */
|
|
+ nla_total_size(sizeof(struct ifla_cacheinfo))
|
|
+ nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
|
|
+ nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
|
|
+ nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
|
|
);
|
|
}
|
|
|
|
static inline void __snmp6_fill_stats(u64 *stats, void **mib, int items,
|
|
int bytes)
|
|
{
|
|
int i;
|
|
int pad = bytes - sizeof(u64) * items;
|
|
BUG_ON(pad < 0);
|
|
|
|
/* Use put_unaligned() because stats may not be aligned for u64. */
|
|
put_unaligned(items, &stats[0]);
|
|
for (i = 1; i < items; i++)
|
|
put_unaligned(snmp_fold_field(mib, i), &stats[i]);
|
|
|
|
memset(&stats[items], 0, pad);
|
|
}
|
|
|
|
static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
|
|
int bytes)
|
|
{
|
|
switch(attrtype) {
|
|
case IFLA_INET6_STATS:
|
|
__snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
|
|
break;
|
|
case IFLA_INET6_ICMP6STATS:
|
|
__snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
|
|
u32 pid, u32 seq, int event, unsigned int flags)
|
|
{
|
|
struct net_device *dev = idev->dev;
|
|
struct nlattr *nla;
|
|
struct ifinfomsg *hdr;
|
|
struct nlmsghdr *nlh;
|
|
void *protoinfo;
|
|
struct ifla_cacheinfo ci;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
hdr = nlmsg_data(nlh);
|
|
hdr->ifi_family = AF_INET6;
|
|
hdr->__ifi_pad = 0;
|
|
hdr->ifi_type = dev->type;
|
|
hdr->ifi_index = dev->ifindex;
|
|
hdr->ifi_flags = dev_get_flags(dev);
|
|
hdr->ifi_change = 0;
|
|
|
|
NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
|
|
|
|
if (dev->addr_len)
|
|
NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
|
|
|
|
NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
|
|
if (dev->ifindex != dev->iflink)
|
|
NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
|
|
|
|
protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
|
|
if (protoinfo == NULL)
|
|
goto nla_put_failure;
|
|
|
|
NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
|
|
|
|
ci.max_reasm_len = IPV6_MAXPLEN;
|
|
ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
|
|
+ TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
|
|
ci.reachable_time = idev->nd_parms->reachable_time;
|
|
ci.retrans_time = idev->nd_parms->retrans_time;
|
|
NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
|
|
|
|
nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
|
|
if (nla == NULL)
|
|
goto nla_put_failure;
|
|
ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
|
|
|
|
/* XXX - MC not implemented */
|
|
|
|
nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
|
|
if (nla == NULL)
|
|
goto nla_put_failure;
|
|
snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
|
|
|
|
nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
|
|
if (nla == NULL)
|
|
goto nla_put_failure;
|
|
snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
|
|
|
|
nla_nest_end(skb, protoinfo);
|
|
return nlmsg_end(skb, nlh);
|
|
|
|
nla_put_failure:
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int idx, err;
|
|
int s_idx = cb->args[0];
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev;
|
|
|
|
read_lock(&dev_base_lock);
|
|
idx = 0;
|
|
for_each_netdev(&init_net, dev) {
|
|
if (idx < s_idx)
|
|
goto cont;
|
|
if ((idev = in6_dev_get(dev)) == NULL)
|
|
goto cont;
|
|
err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
|
|
cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
|
|
in6_dev_put(idev);
|
|
if (err <= 0)
|
|
break;
|
|
cont:
|
|
idx++;
|
|
}
|
|
read_unlock(&dev_base_lock);
|
|
cb->args[0] = idx;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
|
|
{
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
|
|
skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
goto errout;
|
|
|
|
err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
err = rtnl_notify(skb, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
|
|
errout:
|
|
if (err < 0)
|
|
rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR, err);
|
|
}
|
|
|
|
static inline size_t inet6_prefix_nlmsg_size(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct prefixmsg))
|
|
+ nla_total_size(sizeof(struct in6_addr))
|
|
+ nla_total_size(sizeof(struct prefix_cacheinfo));
|
|
}
|
|
|
|
static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
|
|
struct prefix_info *pinfo, u32 pid, u32 seq,
|
|
int event, unsigned int flags)
|
|
{
|
|
struct prefixmsg *pmsg;
|
|
struct nlmsghdr *nlh;
|
|
struct prefix_cacheinfo ci;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
pmsg = nlmsg_data(nlh);
|
|
pmsg->prefix_family = AF_INET6;
|
|
pmsg->prefix_pad1 = 0;
|
|
pmsg->prefix_pad2 = 0;
|
|
pmsg->prefix_ifindex = idev->dev->ifindex;
|
|
pmsg->prefix_len = pinfo->prefix_len;
|
|
pmsg->prefix_type = pinfo->type;
|
|
pmsg->prefix_pad3 = 0;
|
|
pmsg->prefix_flags = 0;
|
|
if (pinfo->onlink)
|
|
pmsg->prefix_flags |= IF_PREFIX_ONLINK;
|
|
if (pinfo->autoconf)
|
|
pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
|
|
|
|
NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
|
|
|
|
ci.preferred_time = ntohl(pinfo->prefered);
|
|
ci.valid_time = ntohl(pinfo->valid);
|
|
NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
|
|
nla_put_failure:
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static void inet6_prefix_notify(int event, struct inet6_dev *idev,
|
|
struct prefix_info *pinfo)
|
|
{
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
|
|
skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
goto errout;
|
|
|
|
err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
err = rtnl_notify(skb, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
|
|
errout:
|
|
if (err < 0)
|
|
rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX, err);
|
|
}
|
|
|
|
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
|
|
{
|
|
inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
|
|
|
|
switch (event) {
|
|
case RTM_NEWADDR:
|
|
/*
|
|
* If the address was optimistic
|
|
* we inserted the route at the start of
|
|
* our DAD process, so we don't need
|
|
* to do it again
|
|
*/
|
|
if (!(ifp->rt->rt6i_node))
|
|
ip6_ins_rt(ifp->rt);
|
|
if (ifp->idev->cnf.forwarding)
|
|
addrconf_join_anycast(ifp);
|
|
break;
|
|
case RTM_DELADDR:
|
|
if (ifp->idev->cnf.forwarding)
|
|
addrconf_leave_anycast(ifp);
|
|
addrconf_leave_solict(ifp->idev, &ifp->addr);
|
|
dst_hold(&ifp->rt->u.dst);
|
|
if (ip6_del_rt(ifp->rt))
|
|
dst_free(&ifp->rt->u.dst);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
|
|
{
|
|
rcu_read_lock_bh();
|
|
if (likely(ifp->idev->dead == 0))
|
|
__ipv6_ifa_notify(event, ifp);
|
|
rcu_read_unlock_bh();
|
|
}
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
|
|
static
|
|
int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int *valp = ctl->data;
|
|
int val = *valp;
|
|
int ret;
|
|
|
|
ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
|
|
|
|
if (write && valp != &ipv6_devconf_dflt.forwarding) {
|
|
if (valp != &ipv6_devconf.forwarding) {
|
|
if ((!*valp) ^ (!val)) {
|
|
struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
|
|
if (idev == NULL)
|
|
return ret;
|
|
dev_forward_change(idev);
|
|
}
|
|
} else {
|
|
ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
|
|
addrconf_forward_change();
|
|
}
|
|
if (*valp)
|
|
rt6_purge_dflt_routers();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int addrconf_sysctl_forward_strategy(ctl_table *table,
|
|
int __user *name, int nlen,
|
|
void __user *oldval,
|
|
size_t __user *oldlenp,
|
|
void __user *newval, size_t newlen)
|
|
{
|
|
int *valp = table->data;
|
|
int new;
|
|
|
|
if (!newval || !newlen)
|
|
return 0;
|
|
if (newlen != sizeof(int))
|
|
return -EINVAL;
|
|
if (get_user(new, (int __user *)newval))
|
|
return -EFAULT;
|
|
if (new == *valp)
|
|
return 0;
|
|
if (oldval && oldlenp) {
|
|
size_t len;
|
|
if (get_user(len, oldlenp))
|
|
return -EFAULT;
|
|
if (len) {
|
|
if (len > table->maxlen)
|
|
len = table->maxlen;
|
|
if (copy_to_user(oldval, valp, len))
|
|
return -EFAULT;
|
|
if (put_user(len, oldlenp))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
if (valp != &ipv6_devconf_dflt.forwarding) {
|
|
if (valp != &ipv6_devconf.forwarding) {
|
|
struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
|
|
int changed;
|
|
if (unlikely(idev == NULL))
|
|
return -ENODEV;
|
|
changed = (!*valp) ^ (!new);
|
|
*valp = new;
|
|
if (changed)
|
|
dev_forward_change(idev);
|
|
} else {
|
|
*valp = new;
|
|
addrconf_forward_change();
|
|
}
|
|
|
|
if (*valp)
|
|
rt6_purge_dflt_routers();
|
|
} else
|
|
*valp = new;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct addrconf_sysctl_table
|
|
{
|
|
struct ctl_table_header *sysctl_header;
|
|
ctl_table addrconf_vars[__NET_IPV6_MAX];
|
|
ctl_table addrconf_dev[2];
|
|
ctl_table addrconf_conf_dir[2];
|
|
ctl_table addrconf_proto_dir[2];
|
|
ctl_table addrconf_root_dir[2];
|
|
} addrconf_sysctl __read_mostly = {
|
|
.sysctl_header = NULL,
|
|
.addrconf_vars = {
|
|
{
|
|
.ctl_name = NET_IPV6_FORWARDING,
|
|
.procname = "forwarding",
|
|
.data = &ipv6_devconf.forwarding,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &addrconf_sysctl_forward,
|
|
.strategy = &addrconf_sysctl_forward_strategy,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_HOP_LIMIT,
|
|
.procname = "hop_limit",
|
|
.data = &ipv6_devconf.hop_limit,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_MTU,
|
|
.procname = "mtu",
|
|
.data = &ipv6_devconf.mtu6,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_ACCEPT_RA,
|
|
.procname = "accept_ra",
|
|
.data = &ipv6_devconf.accept_ra,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
|
|
.procname = "accept_redirects",
|
|
.data = &ipv6_devconf.accept_redirects,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_AUTOCONF,
|
|
.procname = "autoconf",
|
|
.data = &ipv6_devconf.autoconf,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_DAD_TRANSMITS,
|
|
.procname = "dad_transmits",
|
|
.data = &ipv6_devconf.dad_transmits,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_RTR_SOLICITS,
|
|
.procname = "router_solicitations",
|
|
.data = &ipv6_devconf.rtr_solicits,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
|
|
.procname = "router_solicitation_interval",
|
|
.data = &ipv6_devconf.rtr_solicit_interval,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
.strategy = &sysctl_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
|
|
.procname = "router_solicitation_delay",
|
|
.data = &ipv6_devconf.rtr_solicit_delay,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
.strategy = &sysctl_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_FORCE_MLD_VERSION,
|
|
.procname = "force_mld_version",
|
|
.data = &ipv6_devconf.force_mld_version,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
|
{
|
|
.ctl_name = NET_IPV6_USE_TEMPADDR,
|
|
.procname = "use_tempaddr",
|
|
.data = &ipv6_devconf.use_tempaddr,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_TEMP_VALID_LFT,
|
|
.procname = "temp_valid_lft",
|
|
.data = &ipv6_devconf.temp_valid_lft,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
|
|
.procname = "temp_prefered_lft",
|
|
.data = &ipv6_devconf.temp_prefered_lft,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_REGEN_MAX_RETRY,
|
|
.procname = "regen_max_retry",
|
|
.data = &ipv6_devconf.regen_max_retry,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
|
|
.procname = "max_desync_factor",
|
|
.data = &ipv6_devconf.max_desync_factor,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.ctl_name = NET_IPV6_MAX_ADDRESSES,
|
|
.procname = "max_addresses",
|
|
.data = &ipv6_devconf.max_addresses,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
|
|
.procname = "accept_ra_defrtr",
|
|
.data = &ipv6_devconf.accept_ra_defrtr,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
|
|
.procname = "accept_ra_pinfo",
|
|
.data = &ipv6_devconf.accept_ra_pinfo,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_IPV6_ROUTER_PREF
|
|
{
|
|
.ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
|
|
.procname = "accept_ra_rtr_pref",
|
|
.data = &ipv6_devconf.accept_ra_rtr_pref,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
|
|
.procname = "router_probe_interval",
|
|
.data = &ipv6_devconf.rtr_probe_interval,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
.strategy = &sysctl_jiffies,
|
|
},
|
|
#ifdef CONFIG_IPV6_ROUTE_INFO
|
|
{
|
|
.ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
|
|
.procname = "accept_ra_rt_info_max_plen",
|
|
.data = &ipv6_devconf.accept_ra_rt_info_max_plen,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
#endif
|
|
#endif
|
|
{
|
|
.ctl_name = NET_IPV6_PROXY_NDP,
|
|
.procname = "proxy_ndp",
|
|
.data = &ipv6_devconf.proxy_ndp,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV6_ACCEPT_SOURCE_ROUTE,
|
|
.procname = "accept_source_route",
|
|
.data = &ipv6_devconf.accept_source_route,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
|
|
{
|
|
.ctl_name = CTL_UNNUMBERED,
|
|
.procname = "optimistic_dad",
|
|
.data = &ipv6_devconf.optimistic_dad,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
|
|
},
|
|
#endif
|
|
{
|
|
.ctl_name = 0, /* sentinel */
|
|
}
|
|
},
|
|
.addrconf_dev = {
|
|
{
|
|
.ctl_name = NET_PROTO_CONF_ALL,
|
|
.procname = "all",
|
|
.mode = 0555,
|
|
.child = addrconf_sysctl.addrconf_vars,
|
|
},
|
|
{
|
|
.ctl_name = 0, /* sentinel */
|
|
}
|
|
},
|
|
.addrconf_conf_dir = {
|
|
{
|
|
.ctl_name = NET_IPV6_CONF,
|
|
.procname = "conf",
|
|
.mode = 0555,
|
|
.child = addrconf_sysctl.addrconf_dev,
|
|
},
|
|
{
|
|
.ctl_name = 0, /* sentinel */
|
|
}
|
|
},
|
|
.addrconf_proto_dir = {
|
|
{
|
|
.ctl_name = NET_IPV6,
|
|
.procname = "ipv6",
|
|
.mode = 0555,
|
|
.child = addrconf_sysctl.addrconf_conf_dir,
|
|
},
|
|
{
|
|
.ctl_name = 0, /* sentinel */
|
|
}
|
|
},
|
|
.addrconf_root_dir = {
|
|
{
|
|
.ctl_name = CTL_NET,
|
|
.procname = "net",
|
|
.mode = 0555,
|
|
.child = addrconf_sysctl.addrconf_proto_dir,
|
|
},
|
|
{
|
|
.ctl_name = 0, /* sentinel */
|
|
}
|
|
},
|
|
};
|
|
|
|
static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
|
|
{
|
|
int i;
|
|
struct net_device *dev = idev ? idev->dev : NULL;
|
|
struct addrconf_sysctl_table *t;
|
|
char *dev_name = NULL;
|
|
|
|
t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
|
|
if (t == NULL)
|
|
return;
|
|
for (i=0; t->addrconf_vars[i].data; i++) {
|
|
t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
|
|
t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
|
|
}
|
|
if (dev) {
|
|
dev_name = dev->name;
|
|
t->addrconf_dev[0].ctl_name = dev->ifindex;
|
|
} else {
|
|
dev_name = "default";
|
|
t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
|
|
}
|
|
|
|
/*
|
|
* Make a copy of dev_name, because '.procname' is regarded as const
|
|
* by sysctl and we wouldn't want anyone to change it under our feet
|
|
* (see SIOCSIFNAME).
|
|
*/
|
|
dev_name = kstrdup(dev_name, GFP_KERNEL);
|
|
if (!dev_name)
|
|
goto free;
|
|
|
|
t->addrconf_dev[0].procname = dev_name;
|
|
|
|
t->addrconf_dev[0].child = t->addrconf_vars;
|
|
t->addrconf_conf_dir[0].child = t->addrconf_dev;
|
|
t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
|
|
t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
|
|
|
|
t->sysctl_header = register_sysctl_table(t->addrconf_root_dir);
|
|
if (t->sysctl_header == NULL)
|
|
goto free_procname;
|
|
else
|
|
p->sysctl = t;
|
|
return;
|
|
|
|
/* error path */
|
|
free_procname:
|
|
kfree(dev_name);
|
|
free:
|
|
kfree(t);
|
|
|
|
return;
|
|
}
|
|
|
|
static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
|
|
{
|
|
if (p->sysctl) {
|
|
struct addrconf_sysctl_table *t = p->sysctl;
|
|
p->sysctl = NULL;
|
|
unregister_sysctl_table(t->sysctl_header);
|
|
kfree(t->addrconf_dev[0].procname);
|
|
kfree(t);
|
|
}
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Device notifier
|
|
*/
|
|
|
|
int register_inet6addr_notifier(struct notifier_block *nb)
|
|
{
|
|
return atomic_notifier_chain_register(&inet6addr_chain, nb);
|
|
}
|
|
|
|
EXPORT_SYMBOL(register_inet6addr_notifier);
|
|
|
|
int unregister_inet6addr_notifier(struct notifier_block *nb)
|
|
{
|
|
return atomic_notifier_chain_unregister(&inet6addr_chain,nb);
|
|
}
|
|
|
|
EXPORT_SYMBOL(unregister_inet6addr_notifier);
|
|
|
|
/*
|
|
* Init / cleanup code
|
|
*/
|
|
|
|
int __init addrconf_init(void)
|
|
{
|
|
int err = 0;
|
|
|
|
/* The addrconf netdev notifier requires that loopback_dev
|
|
* has it's ipv6 private information allocated and setup
|
|
* before it can bring up and give link-local addresses
|
|
* to other devices which are up.
|
|
*
|
|
* Unfortunately, loopback_dev is not necessarily the first
|
|
* entry in the global dev_base list of net devices. In fact,
|
|
* it is likely to be the very last entry on that list.
|
|
* So this causes the notifier registry below to try and
|
|
* give link-local addresses to all devices besides loopback_dev
|
|
* first, then loopback_dev, which cases all the non-loopback_dev
|
|
* devices to fail to get a link-local address.
|
|
*
|
|
* So, as a temporary fix, allocate the ipv6 structure for
|
|
* loopback_dev first by hand.
|
|
* Longer term, all of the dependencies ipv6 has upon the loopback
|
|
* device and it being up should be removed.
|
|
*/
|
|
rtnl_lock();
|
|
if (!ipv6_add_dev(init_net.loopback_dev))
|
|
err = -ENOMEM;
|
|
rtnl_unlock();
|
|
if (err)
|
|
return err;
|
|
|
|
ip6_null_entry.u.dst.dev = init_net.loopback_dev;
|
|
ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
|
|
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
|
|
ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev;
|
|
ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
|
|
ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev;
|
|
ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
|
|
#endif
|
|
|
|
register_netdevice_notifier(&ipv6_dev_notf);
|
|
|
|
addrconf_verify(0);
|
|
|
|
err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
/* Only the first call to __rtnl_register can fail */
|
|
__rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
|
|
__rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
|
|
__rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
|
|
__rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
|
|
__rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
addrconf_sysctl.sysctl_header =
|
|
register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
|
|
addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
|
|
#endif
|
|
|
|
return 0;
|
|
errout:
|
|
unregister_netdevice_notifier(&ipv6_dev_notf);
|
|
|
|
return err;
|
|
}
|
|
|
|
void __exit addrconf_cleanup(void)
|
|
{
|
|
struct net_device *dev;
|
|
struct inet6_ifaddr *ifa;
|
|
int i;
|
|
|
|
unregister_netdevice_notifier(&ipv6_dev_notf);
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
addrconf_sysctl_unregister(&ipv6_devconf_dflt);
|
|
addrconf_sysctl_unregister(&ipv6_devconf);
|
|
#endif
|
|
|
|
rtnl_lock();
|
|
|
|
/*
|
|
* clean dev list.
|
|
*/
|
|
|
|
for_each_netdev(&init_net, dev) {
|
|
if (__in6_dev_get(dev) == NULL)
|
|
continue;
|
|
addrconf_ifdown(dev, 1);
|
|
}
|
|
addrconf_ifdown(init_net.loopback_dev, 2);
|
|
|
|
/*
|
|
* Check hash table.
|
|
*/
|
|
|
|
write_lock_bh(&addrconf_hash_lock);
|
|
for (i=0; i < IN6_ADDR_HSIZE; i++) {
|
|
for (ifa=inet6_addr_lst[i]; ifa; ) {
|
|
struct inet6_ifaddr *bifa;
|
|
|
|
bifa = ifa;
|
|
ifa = ifa->lst_next;
|
|
printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
|
|
/* Do not free it; something is wrong.
|
|
Now we can investigate it with debugger.
|
|
*/
|
|
}
|
|
}
|
|
write_unlock_bh(&addrconf_hash_lock);
|
|
|
|
del_timer(&addr_chk_timer);
|
|
|
|
rtnl_unlock();
|
|
}
|