| 1 |
1275 |
phoenix |
/*
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* IPv6 Address [auto]configuration
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| 3 |
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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 1.1.1.1 2004-04-15 01:14:43 phoenix 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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* 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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*/
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#include <linux/config.h>
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#include <linux/errno.h>
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| 38 |
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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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| 41 |
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#include <linux/sched.h>
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#include <linux/net.h>
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#include <linux/in6.h>
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| 44 |
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#include <linux/netdevice.h>
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| 45 |
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#include <linux/if_arp.h>
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| 46 |
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#include <linux/if_arcnet.h>
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| 47 |
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#include <linux/route.h>
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| 48 |
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#include <linux/inetdevice.h>
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| 49 |
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#include <linux/init.h>
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| 50 |
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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/delay.h>
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#include <linux/notifier.h>
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#include <linux/proc_fs.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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| 59 |
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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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| 63 |
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#include <net/ip6_route.h>
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| 64 |
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#include <net/addrconf.h>
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#include <net/ip.h>
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#include <linux/if_tunnel.h>
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#include <linux/rtnetlink.h>
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| 69 |
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#include <asm/uaccess.h>
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| 71 |
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#define IPV6_MAX_ADDRESSES 16
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| 73 |
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/* Set to 3 to get tracing... */
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#define ACONF_DEBUG 2
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| 76 |
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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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| 79 |
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#define ADBG(x)
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#endif
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| 82 |
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#ifdef CONFIG_SYSCTL
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| 83 |
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static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
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| 84 |
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static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
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| 85 |
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#endif
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| 86 |
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| 87 |
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int inet6_dev_count;
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| 88 |
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int inet6_ifa_count;
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| 89 |
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| 90 |
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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 rwlock_t addrconf_hash_lock = RW_LOCK_UNLOCKED;
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| 96 |
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/* Protects inet6 devices */
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rwlock_t addrconf_lock = RW_LOCK_UNLOCKED;
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| 98 |
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| 99 |
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void addrconf_verify(unsigned long);
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| 100 |
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| 101 |
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static struct timer_list addr_chk_timer = { function: addrconf_verify };
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static spinlock_t addrconf_verify_lock = SPIN_LOCK_UNLOCKED;
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| 103 |
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| 104 |
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static int addrconf_ifdown(struct net_device *dev, int how);
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| 105 |
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| 106 |
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static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
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| 107 |
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static void addrconf_dad_timer(unsigned long data);
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| 108 |
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static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
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| 109 |
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static void addrconf_rs_timer(unsigned long data);
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| 110 |
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static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
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| 111 |
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| 112 |
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static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
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| 113 |
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| 114 |
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static struct notifier_block *inet6addr_chain;
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| 115 |
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| 116 |
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struct ipv6_devconf ipv6_devconf =
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| 117 |
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{
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| 118 |
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0, /* forwarding */
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| 119 |
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IPV6_DEFAULT_HOPLIMIT, /* hop limit */
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| 120 |
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IPV6_MIN_MTU, /* mtu */
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| 121 |
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1, /* accept RAs */
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| 122 |
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1, /* accept redirects */
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| 123 |
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1, /* autoconfiguration */
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1, /* dad transmits */
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| 125 |
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MAX_RTR_SOLICITATIONS, /* router solicits */
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| 126 |
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RTR_SOLICITATION_INTERVAL, /* rtr solicit interval */
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| 127 |
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MAX_RTR_SOLICITATION_DELAY, /* rtr solicit delay */
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| 128 |
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};
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| 129 |
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| 130 |
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static struct ipv6_devconf ipv6_devconf_dflt =
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| 131 |
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{
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| 132 |
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0, /* forwarding */
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| 133 |
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IPV6_DEFAULT_HOPLIMIT, /* hop limit */
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| 134 |
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IPV6_MIN_MTU, /* mtu */
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| 135 |
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1, /* accept RAs */
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| 136 |
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1, /* accept redirects */
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| 137 |
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1, /* autoconfiguration */
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| 138 |
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1, /* dad transmits */
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| 139 |
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MAX_RTR_SOLICITATIONS, /* router solicits */
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| 140 |
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RTR_SOLICITATION_INTERVAL, /* rtr solicit interval */
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| 141 |
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MAX_RTR_SOLICITATION_DELAY, /* rtr solicit delay */
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| 142 |
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};
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| 143 |
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| 144 |
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/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
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| 145 |
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const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
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| 146 |
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const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
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| 147 |
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| 148 |
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int ipv6_addr_type(const struct in6_addr *addr)
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| 149 |
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{
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| 150 |
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int type;
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| 151 |
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u32 st;
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| 152 |
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| 153 |
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st = addr->s6_addr32[0];
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| 154 |
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| 155 |
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if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
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| 156 |
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type = IPV6_ADDR_MULTICAST;
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| 157 |
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| 158 |
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switch((st & htonl(0x00FF0000))) {
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| 159 |
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case __constant_htonl(0x00010000):
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| 160 |
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type |= IPV6_ADDR_LOOPBACK;
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break;
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| 162 |
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| 163 |
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case __constant_htonl(0x00020000):
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| 164 |
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type |= IPV6_ADDR_LINKLOCAL;
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| 165 |
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break;
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| 166 |
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| 167 |
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case __constant_htonl(0x00050000):
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| 168 |
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type |= IPV6_ADDR_SITELOCAL;
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| 169 |
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break;
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| 170 |
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};
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| 171 |
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return type;
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| 172 |
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}
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| 173 |
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/* check for reserved anycast addresses */
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| 174 |
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| 175 |
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if ((st & htonl(0xE0000000)) &&
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| 176 |
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((addr->s6_addr32[2] == htonl(0xFDFFFFFF) &&
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| 177 |
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(addr->s6_addr32[3] | htonl(0x7F)) == (u32)~0) ||
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| 178 |
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(addr->s6_addr32[2] == 0 && addr->s6_addr32[3] == 0)))
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| 179 |
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type = IPV6_ADDR_ANYCAST;
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| 180 |
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else
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| 181 |
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type = IPV6_ADDR_UNICAST;
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| 182 |
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| 183 |
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/* Consider all addresses with the first three bits different of
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| 184 |
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000 and 111 as finished.
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| 185 |
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*/
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| 186 |
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if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
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| 187 |
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(st & htonl(0xE0000000)) != htonl(0xE0000000))
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| 188 |
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return type;
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| 189 |
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| 190 |
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if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
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| 191 |
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return (IPV6_ADDR_LINKLOCAL | type);
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| 192 |
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| 193 |
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if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
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| 194 |
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return (IPV6_ADDR_SITELOCAL | type);
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| 195 |
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| 196 |
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if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
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| 197 |
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if (addr->s6_addr32[2] == 0) {
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| 198 |
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if (addr->in6_u.u6_addr32[3] == 0)
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| 199 |
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return IPV6_ADDR_ANY;
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| 200 |
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| 201 |
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if (addr->s6_addr32[3] == htonl(0x00000001))
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| 202 |
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return (IPV6_ADDR_LOOPBACK | type);
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| 203 |
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| 204 |
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return (IPV6_ADDR_COMPATv4 | type);
|
| 205 |
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}
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| 206 |
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|
| 207 |
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if (addr->s6_addr32[2] == htonl(0x0000ffff))
|
| 208 |
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return IPV6_ADDR_MAPPED;
|
| 209 |
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}
|
| 210 |
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|
|
| 211 |
|
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st &= htonl(0xFF000000);
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| 212 |
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if (st == 0)
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| 213 |
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return IPV6_ADDR_RESERVED;
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| 214 |
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st &= htonl(0xFE000000);
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| 215 |
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if (st == htonl(0x02000000))
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| 216 |
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return IPV6_ADDR_RESERVED; /* for NSAP */
|
| 217 |
|
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if (st == htonl(0x04000000))
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| 218 |
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return IPV6_ADDR_RESERVED; /* for IPX */
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| 219 |
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return type;
|
| 220 |
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}
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| 221 |
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| 222 |
|
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static void addrconf_del_timer(struct inet6_ifaddr *ifp)
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| 223 |
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{
|
| 224 |
|
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if (del_timer(&ifp->timer))
|
| 225 |
|
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__in6_ifa_put(ifp);
|
| 226 |
|
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}
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| 227 |
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|
| 228 |
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enum addrconf_timer_t
|
| 229 |
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{
|
| 230 |
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AC_NONE,
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| 231 |
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AC_DAD,
|
| 232 |
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AC_RS,
|
| 233 |
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};
|
| 234 |
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| 235 |
|
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static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
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| 236 |
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enum addrconf_timer_t what,
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| 237 |
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unsigned long when)
|
| 238 |
|
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{
|
| 239 |
|
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if (!del_timer(&ifp->timer))
|
| 240 |
|
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in6_ifa_hold(ifp);
|
| 241 |
|
|
|
| 242 |
|
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switch (what) {
|
| 243 |
|
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case AC_DAD:
|
| 244 |
|
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ifp->timer.function = addrconf_dad_timer;
|
| 245 |
|
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break;
|
| 246 |
|
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case AC_RS:
|
| 247 |
|
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ifp->timer.function = addrconf_rs_timer;
|
| 248 |
|
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break;
|
| 249 |
|
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default:;
|
| 250 |
|
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}
|
| 251 |
|
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ifp->timer.expires = jiffies + when;
|
| 252 |
|
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add_timer(&ifp->timer);
|
| 253 |
|
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}
|
| 254 |
|
|
|
| 255 |
|
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/* Nobody refers to this device, we may destroy it. */
|
| 256 |
|
|
|
| 257 |
|
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void in6_dev_finish_destroy(struct inet6_dev *idev)
|
| 258 |
|
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{
|
| 259 |
|
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struct net_device *dev = idev->dev;
|
| 260 |
|
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BUG_TRAP(idev->addr_list==NULL);
|
| 261 |
|
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BUG_TRAP(idev->mc_list==NULL);
|
| 262 |
|
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#ifdef NET_REFCNT_DEBUG
|
| 263 |
|
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printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
|
| 264 |
|
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#endif
|
| 265 |
|
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dev_put(dev);
|
| 266 |
|
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if (!idev->dead) {
|
| 267 |
|
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printk("Freeing alive inet6 device %p\n", idev);
|
| 268 |
|
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return;
|
| 269 |
|
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}
|
| 270 |
|
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inet6_dev_count--;
|
| 271 |
|
|
kfree(idev);
|
| 272 |
|
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}
|
| 273 |
|
|
|
| 274 |
|
|
static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
|
| 275 |
|
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{
|
| 276 |
|
|
struct inet6_dev *ndev;
|
| 277 |
|
|
|
| 278 |
|
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ASSERT_RTNL();
|
| 279 |
|
|
|
| 280 |
|
|
if (dev->mtu < IPV6_MIN_MTU)
|
| 281 |
|
|
return NULL;
|
| 282 |
|
|
|
| 283 |
|
|
ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL);
|
| 284 |
|
|
|
| 285 |
|
|
if (ndev) {
|
| 286 |
|
|
memset(ndev, 0, sizeof(struct inet6_dev));
|
| 287 |
|
|
|
| 288 |
|
|
ndev->lock = RW_LOCK_UNLOCKED;
|
| 289 |
|
|
ndev->dev = dev;
|
| 290 |
|
|
memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
|
| 291 |
|
|
ndev->cnf.mtu6 = dev->mtu;
|
| 292 |
|
|
ndev->cnf.sysctl = NULL;
|
| 293 |
|
|
ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
|
| 294 |
|
|
if (ndev->nd_parms == NULL) {
|
| 295 |
|
|
kfree(ndev);
|
| 296 |
|
|
return NULL;
|
| 297 |
|
|
}
|
| 298 |
|
|
inet6_dev_count++;
|
| 299 |
|
|
/* We refer to the device */
|
| 300 |
|
|
dev_hold(dev);
|
| 301 |
|
|
|
| 302 |
|
|
write_lock_bh(&addrconf_lock);
|
| 303 |
|
|
dev->ip6_ptr = ndev;
|
| 304 |
|
|
/* One reference from device */
|
| 305 |
|
|
in6_dev_hold(ndev);
|
| 306 |
|
|
write_unlock_bh(&addrconf_lock);
|
| 307 |
|
|
|
| 308 |
|
|
ipv6_mc_init_dev(ndev);
|
| 309 |
|
|
|
| 310 |
|
|
#ifdef CONFIG_SYSCTL
|
| 311 |
|
|
neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, NET_IPV6_NEIGH, "ipv6");
|
| 312 |
|
|
addrconf_sysctl_register(ndev, &ndev->cnf);
|
| 313 |
|
|
#endif
|
| 314 |
|
|
}
|
| 315 |
|
|
return ndev;
|
| 316 |
|
|
}
|
| 317 |
|
|
|
| 318 |
|
|
static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
|
| 319 |
|
|
{
|
| 320 |
|
|
struct inet6_dev *idev;
|
| 321 |
|
|
|
| 322 |
|
|
ASSERT_RTNL();
|
| 323 |
|
|
|
| 324 |
|
|
if ((idev = __in6_dev_get(dev)) == NULL) {
|
| 325 |
|
|
if ((idev = ipv6_add_dev(dev)) == NULL)
|
| 326 |
|
|
return NULL;
|
| 327 |
|
|
}
|
| 328 |
|
|
if (dev->flags&IFF_UP)
|
| 329 |
|
|
ipv6_mc_up(idev);
|
| 330 |
|
|
return idev;
|
| 331 |
|
|
}
|
| 332 |
|
|
|
| 333 |
|
|
void ipv6_addr_prefix(struct in6_addr *prefix,
|
| 334 |
|
|
struct in6_addr *addr, int prefix_len)
|
| 335 |
|
|
{
|
| 336 |
|
|
unsigned long mask;
|
| 337 |
|
|
int ncopy, nbits;
|
| 338 |
|
|
|
| 339 |
|
|
memset(prefix, 0, sizeof(*prefix));
|
| 340 |
|
|
|
| 341 |
|
|
if (prefix_len <= 0)
|
| 342 |
|
|
return;
|
| 343 |
|
|
if (prefix_len > 128)
|
| 344 |
|
|
prefix_len = 128;
|
| 345 |
|
|
|
| 346 |
|
|
ncopy = prefix_len / 32;
|
| 347 |
|
|
switch (ncopy) {
|
| 348 |
|
|
case 4: prefix->s6_addr32[3] = addr->s6_addr32[3];
|
| 349 |
|
|
case 3: prefix->s6_addr32[2] = addr->s6_addr32[2];
|
| 350 |
|
|
case 2: prefix->s6_addr32[1] = addr->s6_addr32[1];
|
| 351 |
|
|
case 1: prefix->s6_addr32[0] = addr->s6_addr32[0];
|
| 352 |
|
|
case 0: break;
|
| 353 |
|
|
}
|
| 354 |
|
|
nbits = prefix_len % 32;
|
| 355 |
|
|
if (nbits == 0)
|
| 356 |
|
|
return;
|
| 357 |
|
|
|
| 358 |
|
|
mask = ~((1 << (32 - nbits)) - 1);
|
| 359 |
|
|
mask = htonl(mask);
|
| 360 |
|
|
|
| 361 |
|
|
prefix->s6_addr32[ncopy] = addr->s6_addr32[ncopy] & mask;
|
| 362 |
|
|
}
|
| 363 |
|
|
|
| 364 |
|
|
|
| 365 |
|
|
static void dev_forward_change(struct inet6_dev *idev)
|
| 366 |
|
|
{
|
| 367 |
|
|
struct net_device *dev;
|
| 368 |
|
|
struct inet6_ifaddr *ifa;
|
| 369 |
|
|
struct in6_addr addr;
|
| 370 |
|
|
|
| 371 |
|
|
if (!idev)
|
| 372 |
|
|
return;
|
| 373 |
|
|
dev = idev->dev;
|
| 374 |
|
|
if (dev && (dev->flags & IFF_MULTICAST)) {
|
| 375 |
|
|
ipv6_addr_all_routers(&addr);
|
| 376 |
|
|
|
| 377 |
|
|
if (idev->cnf.forwarding)
|
| 378 |
|
|
ipv6_dev_mc_inc(dev, &addr);
|
| 379 |
|
|
else
|
| 380 |
|
|
ipv6_dev_mc_dec(dev, &addr);
|
| 381 |
|
|
}
|
| 382 |
|
|
for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
|
| 383 |
|
|
ipv6_addr_prefix(&addr, &ifa->addr, ifa->prefix_len);
|
| 384 |
|
|
if (ipv6_addr_any(&addr))
|
| 385 |
|
|
continue;
|
| 386 |
|
|
if (idev->cnf.forwarding)
|
| 387 |
|
|
ipv6_dev_ac_inc(idev->dev, &addr);
|
| 388 |
|
|
else
|
| 389 |
|
|
ipv6_dev_ac_dec(idev->dev, &addr);
|
| 390 |
|
|
}
|
| 391 |
|
|
}
|
| 392 |
|
|
|
| 393 |
|
|
|
| 394 |
|
|
static void addrconf_forward_change(struct inet6_dev *idev)
|
| 395 |
|
|
{
|
| 396 |
|
|
struct net_device *dev;
|
| 397 |
|
|
|
| 398 |
|
|
if (idev) {
|
| 399 |
|
|
dev_forward_change(idev);
|
| 400 |
|
|
return;
|
| 401 |
|
|
}
|
| 402 |
|
|
|
| 403 |
|
|
read_lock(&dev_base_lock);
|
| 404 |
|
|
for (dev=dev_base; dev; dev=dev->next) {
|
| 405 |
|
|
read_lock(&addrconf_lock);
|
| 406 |
|
|
idev = __in6_dev_get(dev);
|
| 407 |
|
|
if (idev) {
|
| 408 |
|
|
idev->cnf.forwarding = ipv6_devconf.forwarding;
|
| 409 |
|
|
dev_forward_change(idev);
|
| 410 |
|
|
}
|
| 411 |
|
|
read_unlock(&addrconf_lock);
|
| 412 |
|
|
}
|
| 413 |
|
|
read_unlock(&dev_base_lock);
|
| 414 |
|
|
}
|
| 415 |
|
|
|
| 416 |
|
|
|
| 417 |
|
|
/* Nobody refers to this ifaddr, destroy it */
|
| 418 |
|
|
|
| 419 |
|
|
void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
|
| 420 |
|
|
{
|
| 421 |
|
|
BUG_TRAP(ifp->if_next==NULL);
|
| 422 |
|
|
BUG_TRAP(ifp->lst_next==NULL);
|
| 423 |
|
|
#ifdef NET_REFCNT_DEBUG
|
| 424 |
|
|
printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
|
| 425 |
|
|
#endif
|
| 426 |
|
|
|
| 427 |
|
|
in6_dev_put(ifp->idev);
|
| 428 |
|
|
|
| 429 |
|
|
if (del_timer(&ifp->timer))
|
| 430 |
|
|
printk("Timer is still running, when freeing ifa=%p\n", ifp);
|
| 431 |
|
|
|
| 432 |
|
|
if (!ifp->dead) {
|
| 433 |
|
|
printk("Freeing alive inet6 address %p\n", ifp);
|
| 434 |
|
|
return;
|
| 435 |
|
|
}
|
| 436 |
|
|
inet6_ifa_count--;
|
| 437 |
|
|
kfree(ifp);
|
| 438 |
|
|
}
|
| 439 |
|
|
|
| 440 |
|
|
/* On success it returns ifp with increased reference count */
|
| 441 |
|
|
|
| 442 |
|
|
static struct inet6_ifaddr *
|
| 443 |
|
|
ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
|
| 444 |
|
|
int scope, unsigned flags)
|
| 445 |
|
|
{
|
| 446 |
|
|
struct inet6_ifaddr *ifa;
|
| 447 |
|
|
int hash;
|
| 448 |
|
|
static spinlock_t lock = SPIN_LOCK_UNLOCKED;
|
| 449 |
|
|
|
| 450 |
|
|
spin_lock_bh(&lock);
|
| 451 |
|
|
|
| 452 |
|
|
/* Ignore adding duplicate addresses on an interface */
|
| 453 |
|
|
if (ipv6_chk_same_addr(addr, idev->dev)) {
|
| 454 |
|
|
spin_unlock_bh(&lock);
|
| 455 |
|
|
ADBG(("ipv6_add_addr: already assigned\n"));
|
| 456 |
|
|
return ERR_PTR(-EEXIST);
|
| 457 |
|
|
}
|
| 458 |
|
|
|
| 459 |
|
|
ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
|
| 460 |
|
|
|
| 461 |
|
|
if (ifa == NULL) {
|
| 462 |
|
|
spin_unlock_bh(&lock);
|
| 463 |
|
|
ADBG(("ipv6_add_addr: malloc failed\n"));
|
| 464 |
|
|
return ERR_PTR(-ENOBUFS);
|
| 465 |
|
|
}
|
| 466 |
|
|
|
| 467 |
|
|
memset(ifa, 0, sizeof(struct inet6_ifaddr));
|
| 468 |
|
|
ipv6_addr_copy(&ifa->addr, addr);
|
| 469 |
|
|
|
| 470 |
|
|
spin_lock_init(&ifa->lock);
|
| 471 |
|
|
init_timer(&ifa->timer);
|
| 472 |
|
|
ifa->timer.data = (unsigned long) ifa;
|
| 473 |
|
|
ifa->scope = scope;
|
| 474 |
|
|
ifa->prefix_len = pfxlen;
|
| 475 |
|
|
ifa->flags = flags | IFA_F_TENTATIVE;
|
| 476 |
|
|
|
| 477 |
|
|
read_lock(&addrconf_lock);
|
| 478 |
|
|
if (idev->dead) {
|
| 479 |
|
|
read_unlock(&addrconf_lock);
|
| 480 |
|
|
spin_unlock_bh(&lock);
|
| 481 |
|
|
kfree(ifa);
|
| 482 |
|
|
return ERR_PTR(-ENODEV); /*XXX*/
|
| 483 |
|
|
}
|
| 484 |
|
|
|
| 485 |
|
|
inet6_ifa_count++;
|
| 486 |
|
|
ifa->idev = idev;
|
| 487 |
|
|
in6_dev_hold(idev);
|
| 488 |
|
|
/* For caller */
|
| 489 |
|
|
in6_ifa_hold(ifa);
|
| 490 |
|
|
|
| 491 |
|
|
/* Add to big hash table */
|
| 492 |
|
|
hash = ipv6_addr_hash(addr);
|
| 493 |
|
|
|
| 494 |
|
|
write_lock_bh(&addrconf_hash_lock);
|
| 495 |
|
|
ifa->lst_next = inet6_addr_lst[hash];
|
| 496 |
|
|
inet6_addr_lst[hash] = ifa;
|
| 497 |
|
|
in6_ifa_hold(ifa);
|
| 498 |
|
|
write_unlock_bh(&addrconf_hash_lock);
|
| 499 |
|
|
|
| 500 |
|
|
write_lock_bh(&idev->lock);
|
| 501 |
|
|
/* Add to inet6_dev unicast addr list. */
|
| 502 |
|
|
ifa->if_next = idev->addr_list;
|
| 503 |
|
|
idev->addr_list = ifa;
|
| 504 |
|
|
in6_ifa_hold(ifa);
|
| 505 |
|
|
write_unlock_bh(&idev->lock);
|
| 506 |
|
|
read_unlock(&addrconf_lock);
|
| 507 |
|
|
spin_unlock_bh(&lock);
|
| 508 |
|
|
|
| 509 |
|
|
notifier_call_chain(&inet6addr_chain,NETDEV_UP,ifa);
|
| 510 |
|
|
|
| 511 |
|
|
return ifa;
|
| 512 |
|
|
}
|
| 513 |
|
|
|
| 514 |
|
|
/* This function wants to get referenced ifp and releases it before return */
|
| 515 |
|
|
|
| 516 |
|
|
static void ipv6_del_addr(struct inet6_ifaddr *ifp)
|
| 517 |
|
|
{
|
| 518 |
|
|
struct inet6_ifaddr *ifa, **ifap;
|
| 519 |
|
|
struct inet6_dev *idev = ifp->idev;
|
| 520 |
|
|
int hash;
|
| 521 |
|
|
|
| 522 |
|
|
hash = ipv6_addr_hash(&ifp->addr);
|
| 523 |
|
|
|
| 524 |
|
|
ifp->dead = 1;
|
| 525 |
|
|
|
| 526 |
|
|
write_lock_bh(&addrconf_hash_lock);
|
| 527 |
|
|
for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
|
| 528 |
|
|
ifap = &ifa->lst_next) {
|
| 529 |
|
|
if (ifa == ifp) {
|
| 530 |
|
|
*ifap = ifa->lst_next;
|
| 531 |
|
|
__in6_ifa_put(ifp);
|
| 532 |
|
|
ifa->lst_next = NULL;
|
| 533 |
|
|
break;
|
| 534 |
|
|
}
|
| 535 |
|
|
}
|
| 536 |
|
|
write_unlock_bh(&addrconf_hash_lock);
|
| 537 |
|
|
|
| 538 |
|
|
write_lock_bh(&idev->lock);
|
| 539 |
|
|
for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
|
| 540 |
|
|
ifap = &ifa->if_next) {
|
| 541 |
|
|
if (ifa == ifp) {
|
| 542 |
|
|
*ifap = ifa->if_next;
|
| 543 |
|
|
__in6_ifa_put(ifp);
|
| 544 |
|
|
ifa->if_next = NULL;
|
| 545 |
|
|
break;
|
| 546 |
|
|
}
|
| 547 |
|
|
}
|
| 548 |
|
|
write_unlock_bh(&idev->lock);
|
| 549 |
|
|
|
| 550 |
|
|
ipv6_ifa_notify(RTM_DELADDR, ifp);
|
| 551 |
|
|
|
| 552 |
|
|
notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
|
| 553 |
|
|
|
| 554 |
|
|
addrconf_del_timer(ifp);
|
| 555 |
|
|
|
| 556 |
|
|
in6_ifa_put(ifp);
|
| 557 |
|
|
}
|
| 558 |
|
|
|
| 559 |
|
|
/*
|
| 560 |
|
|
* Choose an apropriate source address
|
| 561 |
|
|
* should do:
|
| 562 |
|
|
* i) get an address with an apropriate scope
|
| 563 |
|
|
* ii) see if there is a specific route for the destination and use
|
| 564 |
|
|
* an address of the attached interface
|
| 565 |
|
|
* iii) don't use deprecated addresses
|
| 566 |
|
|
*/
|
| 567 |
|
|
int ipv6_dev_get_saddr(struct net_device *dev,
|
| 568 |
|
|
struct in6_addr *daddr, struct in6_addr *saddr, int onlink)
|
| 569 |
|
|
{
|
| 570 |
|
|
struct inet6_ifaddr *ifp = NULL;
|
| 571 |
|
|
struct inet6_ifaddr *match = NULL;
|
| 572 |
|
|
struct inet6_dev *idev;
|
| 573 |
|
|
int scope;
|
| 574 |
|
|
int err;
|
| 575 |
|
|
|
| 576 |
|
|
|
| 577 |
|
|
if (!onlink)
|
| 578 |
|
|
scope = ipv6_addr_scope(daddr);
|
| 579 |
|
|
else
|
| 580 |
|
|
scope = IFA_LINK;
|
| 581 |
|
|
|
| 582 |
|
|
/*
|
| 583 |
|
|
* known dev
|
| 584 |
|
|
* search dev and walk through dev addresses
|
| 585 |
|
|
*/
|
| 586 |
|
|
|
| 587 |
|
|
if (dev) {
|
| 588 |
|
|
if (dev->flags & IFF_LOOPBACK)
|
| 589 |
|
|
scope = IFA_HOST;
|
| 590 |
|
|
|
| 591 |
|
|
read_lock(&addrconf_lock);
|
| 592 |
|
|
idev = __in6_dev_get(dev);
|
| 593 |
|
|
if (idev) {
|
| 594 |
|
|
read_lock_bh(&idev->lock);
|
| 595 |
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
|
| 596 |
|
|
if (ifp->scope == scope) {
|
| 597 |
|
|
if (!(ifp->flags & (IFA_F_DEPRECATED|IFA_F_TENTATIVE))) {
|
| 598 |
|
|
in6_ifa_hold(ifp);
|
| 599 |
|
|
read_unlock_bh(&idev->lock);
|
| 600 |
|
|
read_unlock(&addrconf_lock);
|
| 601 |
|
|
goto out;
|
| 602 |
|
|
}
|
| 603 |
|
|
|
| 604 |
|
|
if (!match && !(ifp->flags & IFA_F_TENTATIVE)) {
|
| 605 |
|
|
match = ifp;
|
| 606 |
|
|
in6_ifa_hold(ifp);
|
| 607 |
|
|
}
|
| 608 |
|
|
}
|
| 609 |
|
|
}
|
| 610 |
|
|
read_unlock_bh(&idev->lock);
|
| 611 |
|
|
}
|
| 612 |
|
|
read_unlock(&addrconf_lock);
|
| 613 |
|
|
}
|
| 614 |
|
|
|
| 615 |
|
|
if (scope == IFA_LINK)
|
| 616 |
|
|
goto out;
|
| 617 |
|
|
|
| 618 |
|
|
/*
|
| 619 |
|
|
* dev == NULL or search failed for specified dev
|
| 620 |
|
|
*/
|
| 621 |
|
|
|
| 622 |
|
|
read_lock(&dev_base_lock);
|
| 623 |
|
|
read_lock(&addrconf_lock);
|
| 624 |
|
|
for (dev = dev_base; dev; dev=dev->next) {
|
| 625 |
|
|
idev = __in6_dev_get(dev);
|
| 626 |
|
|
if (idev) {
|
| 627 |
|
|
read_lock_bh(&idev->lock);
|
| 628 |
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
|
| 629 |
|
|
if (ifp->scope == scope) {
|
| 630 |
|
|
if (!(ifp->flags&(IFA_F_DEPRECATED|IFA_F_TENTATIVE))) {
|
| 631 |
|
|
in6_ifa_hold(ifp);
|
| 632 |
|
|
read_unlock_bh(&idev->lock);
|
| 633 |
|
|
goto out_unlock_base;
|
| 634 |
|
|
}
|
| 635 |
|
|
|
| 636 |
|
|
if (!match && !(ifp->flags&IFA_F_TENTATIVE)) {
|
| 637 |
|
|
match = ifp;
|
| 638 |
|
|
in6_ifa_hold(ifp);
|
| 639 |
|
|
}
|
| 640 |
|
|
}
|
| 641 |
|
|
}
|
| 642 |
|
|
read_unlock_bh(&idev->lock);
|
| 643 |
|
|
}
|
| 644 |
|
|
}
|
| 645 |
|
|
|
| 646 |
|
|
out_unlock_base:
|
| 647 |
|
|
read_unlock(&addrconf_lock);
|
| 648 |
|
|
read_unlock(&dev_base_lock);
|
| 649 |
|
|
|
| 650 |
|
|
out:
|
| 651 |
|
|
if (ifp == NULL) {
|
| 652 |
|
|
ifp = match;
|
| 653 |
|
|
match = NULL;
|
| 654 |
|
|
}
|
| 655 |
|
|
|
| 656 |
|
|
err = -EADDRNOTAVAIL;
|
| 657 |
|
|
if (ifp) {
|
| 658 |
|
|
ipv6_addr_copy(saddr, &ifp->addr);
|
| 659 |
|
|
err = 0;
|
| 660 |
|
|
in6_ifa_put(ifp);
|
| 661 |
|
|
}
|
| 662 |
|
|
if (match)
|
| 663 |
|
|
in6_ifa_put(match);
|
| 664 |
|
|
|
| 665 |
|
|
return err;
|
| 666 |
|
|
}
|
| 667 |
|
|
|
| 668 |
|
|
|
| 669 |
|
|
int ipv6_get_saddr(struct dst_entry *dst,
|
| 670 |
|
|
struct in6_addr *daddr, struct in6_addr *saddr)
|
| 671 |
|
|
{
|
| 672 |
|
|
struct rt6_info *rt;
|
| 673 |
|
|
struct net_device *dev = NULL;
|
| 674 |
|
|
int onlink;
|
| 675 |
|
|
|
| 676 |
|
|
rt = (struct rt6_info *) dst;
|
| 677 |
|
|
if (rt)
|
| 678 |
|
|
dev = rt->rt6i_dev;
|
| 679 |
|
|
|
| 680 |
|
|
onlink = (rt && (rt->rt6i_flags & RTF_ALLONLINK));
|
| 681 |
|
|
|
| 682 |
|
|
return ipv6_dev_get_saddr(dev, daddr, saddr, onlink);
|
| 683 |
|
|
}
|
| 684 |
|
|
|
| 685 |
|
|
|
| 686 |
|
|
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
|
| 687 |
|
|
{
|
| 688 |
|
|
struct inet6_dev *idev;
|
| 689 |
|
|
int err = -EADDRNOTAVAIL;
|
| 690 |
|
|
|
| 691 |
|
|
read_lock(&addrconf_lock);
|
| 692 |
|
|
if ((idev = __in6_dev_get(dev)) != NULL) {
|
| 693 |
|
|
struct inet6_ifaddr *ifp;
|
| 694 |
|
|
|
| 695 |
|
|
read_lock_bh(&idev->lock);
|
| 696 |
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
|
| 697 |
|
|
if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
|
| 698 |
|
|
ipv6_addr_copy(addr, &ifp->addr);
|
| 699 |
|
|
err = 0;
|
| 700 |
|
|
break;
|
| 701 |
|
|
}
|
| 702 |
|
|
}
|
| 703 |
|
|
read_unlock_bh(&idev->lock);
|
| 704 |
|
|
}
|
| 705 |
|
|
read_unlock(&addrconf_lock);
|
| 706 |
|
|
return err;
|
| 707 |
|
|
}
|
| 708 |
|
|
|
| 709 |
|
|
int ipv6_count_addresses(struct inet6_dev *idev)
|
| 710 |
|
|
{
|
| 711 |
|
|
int cnt = 0;
|
| 712 |
|
|
struct inet6_ifaddr *ifp;
|
| 713 |
|
|
|
| 714 |
|
|
read_lock_bh(&idev->lock);
|
| 715 |
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
|
| 716 |
|
|
cnt++;
|
| 717 |
|
|
read_unlock_bh(&idev->lock);
|
| 718 |
|
|
return cnt;
|
| 719 |
|
|
}
|
| 720 |
|
|
|
| 721 |
|
|
int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev)
|
| 722 |
|
|
{
|
| 723 |
|
|
struct inet6_ifaddr * ifp;
|
| 724 |
|
|
u8 hash = ipv6_addr_hash(addr);
|
| 725 |
|
|
|
| 726 |
|
|
read_lock_bh(&addrconf_hash_lock);
|
| 727 |
|
|
for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
|
| 728 |
|
|
if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
|
| 729 |
|
|
!(ifp->flags&IFA_F_TENTATIVE)) {
|
| 730 |
|
|
if (dev == NULL || ifp->idev->dev == dev ||
|
| 731 |
|
|
!(ifp->scope&(IFA_LINK|IFA_HOST)))
|
| 732 |
|
|
break;
|
| 733 |
|
|
}
|
| 734 |
|
|
}
|
| 735 |
|
|
read_unlock_bh(&addrconf_hash_lock);
|
| 736 |
|
|
return ifp != NULL;
|
| 737 |
|
|
}
|
| 738 |
|
|
|
| 739 |
|
|
static
|
| 740 |
|
|
int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
|
| 741 |
|
|
{
|
| 742 |
|
|
struct inet6_ifaddr * ifp;
|
| 743 |
|
|
u8 hash = ipv6_addr_hash(addr);
|
| 744 |
|
|
|
| 745 |
|
|
read_lock_bh(&addrconf_hash_lock);
|
| 746 |
|
|
for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
|
| 747 |
|
|
if (ipv6_addr_cmp(&ifp->addr, addr) == 0) {
|
| 748 |
|
|
if (dev == NULL || ifp->idev->dev == dev)
|
| 749 |
|
|
break;
|
| 750 |
|
|
}
|
| 751 |
|
|
}
|
| 752 |
|
|
read_unlock_bh(&addrconf_hash_lock);
|
| 753 |
|
|
return ifp != NULL;
|
| 754 |
|
|
}
|
| 755 |
|
|
|
| 756 |
|
|
struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev)
|
| 757 |
|
|
{
|
| 758 |
|
|
struct inet6_ifaddr * ifp;
|
| 759 |
|
|
u8 hash = ipv6_addr_hash(addr);
|
| 760 |
|
|
|
| 761 |
|
|
read_lock_bh(&addrconf_hash_lock);
|
| 762 |
|
|
for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
|
| 763 |
|
|
if (ipv6_addr_cmp(&ifp->addr, addr) == 0) {
|
| 764 |
|
|
if (dev == NULL || ifp->idev->dev == dev ||
|
| 765 |
|
|
!(ifp->scope&(IFA_LINK|IFA_HOST))) {
|
| 766 |
|
|
in6_ifa_hold(ifp);
|
| 767 |
|
|
break;
|
| 768 |
|
|
}
|
| 769 |
|
|
}
|
| 770 |
|
|
}
|
| 771 |
|
|
read_unlock_bh(&addrconf_hash_lock);
|
| 772 |
|
|
|
| 773 |
|
|
return ifp;
|
| 774 |
|
|
}
|
| 775 |
|
|
|
| 776 |
|
|
/* Gets referenced address, destroys ifaddr */
|
| 777 |
|
|
|
| 778 |
|
|
void addrconf_dad_failure(struct inet6_ifaddr *ifp)
|
| 779 |
|
|
{
|
| 780 |
|
|
if (net_ratelimit())
|
| 781 |
|
|
printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
|
| 782 |
|
|
if (ifp->flags&IFA_F_PERMANENT) {
|
| 783 |
|
|
spin_lock_bh(&ifp->lock);
|
| 784 |
|
|
addrconf_del_timer(ifp);
|
| 785 |
|
|
ifp->flags |= IFA_F_TENTATIVE;
|
| 786 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 787 |
|
|
in6_ifa_put(ifp);
|
| 788 |
|
|
} else
|
| 789 |
|
|
ipv6_del_addr(ifp);
|
| 790 |
|
|
}
|
| 791 |
|
|
|
| 792 |
|
|
|
| 793 |
|
|
/* Join to solicited addr multicast group. */
|
| 794 |
|
|
|
| 795 |
|
|
void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
|
| 796 |
|
|
{
|
| 797 |
|
|
struct in6_addr maddr;
|
| 798 |
|
|
|
| 799 |
|
|
if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
|
| 800 |
|
|
return;
|
| 801 |
|
|
|
| 802 |
|
|
addrconf_addr_solict_mult(addr, &maddr);
|
| 803 |
|
|
ipv6_dev_mc_inc(dev, &maddr);
|
| 804 |
|
|
}
|
| 805 |
|
|
|
| 806 |
|
|
void addrconf_leave_solict(struct net_device *dev, struct in6_addr *addr)
|
| 807 |
|
|
{
|
| 808 |
|
|
struct in6_addr maddr;
|
| 809 |
|
|
|
| 810 |
|
|
if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
|
| 811 |
|
|
return;
|
| 812 |
|
|
|
| 813 |
|
|
addrconf_addr_solict_mult(addr, &maddr);
|
| 814 |
|
|
ipv6_dev_mc_dec(dev, &maddr);
|
| 815 |
|
|
}
|
| 816 |
|
|
|
| 817 |
|
|
|
| 818 |
|
|
static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
|
| 819 |
|
|
{
|
| 820 |
|
|
switch (dev->type) {
|
| 821 |
|
|
case ARPHRD_ETHER:
|
| 822 |
|
|
case ARPHRD_FDDI:
|
| 823 |
|
|
case ARPHRD_IEEE802_TR:
|
| 824 |
|
|
if (dev->addr_len != ETH_ALEN)
|
| 825 |
|
|
return -1;
|
| 826 |
|
|
memcpy(eui, dev->dev_addr, 3);
|
| 827 |
|
|
memcpy(eui + 5, dev->dev_addr+3, 3);
|
| 828 |
|
|
eui[3] = 0xFF;
|
| 829 |
|
|
eui[4] = 0xFE;
|
| 830 |
|
|
eui[0] ^= 2;
|
| 831 |
|
|
return 0;
|
| 832 |
|
|
case ARPHRD_ARCNET:
|
| 833 |
|
|
/* XXX: inherit EUI-64 fro mother interface -- yoshfuji */
|
| 834 |
|
|
if (dev->addr_len != ARCNET_ALEN)
|
| 835 |
|
|
return -1;
|
| 836 |
|
|
memset(eui, 0, 7);
|
| 837 |
|
|
eui[7] = *(u8*)dev->dev_addr;
|
| 838 |
|
|
return 0;
|
| 839 |
|
|
}
|
| 840 |
|
|
return -1;
|
| 841 |
|
|
}
|
| 842 |
|
|
|
| 843 |
|
|
static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
|
| 844 |
|
|
{
|
| 845 |
|
|
int err = -1;
|
| 846 |
|
|
struct inet6_ifaddr *ifp;
|
| 847 |
|
|
|
| 848 |
|
|
read_lock_bh(&idev->lock);
|
| 849 |
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
|
| 850 |
|
|
if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
|
| 851 |
|
|
memcpy(eui, ifp->addr.s6_addr+8, 8);
|
| 852 |
|
|
err = 0;
|
| 853 |
|
|
break;
|
| 854 |
|
|
}
|
| 855 |
|
|
}
|
| 856 |
|
|
read_unlock_bh(&idev->lock);
|
| 857 |
|
|
return err;
|
| 858 |
|
|
}
|
| 859 |
|
|
|
| 860 |
|
|
/*
|
| 861 |
|
|
* Add prefix route.
|
| 862 |
|
|
*/
|
| 863 |
|
|
|
| 864 |
|
|
static void
|
| 865 |
|
|
addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
|
| 866 |
|
|
unsigned long expires, unsigned flags)
|
| 867 |
|
|
{
|
| 868 |
|
|
struct in6_rtmsg rtmsg;
|
| 869 |
|
|
|
| 870 |
|
|
memset(&rtmsg, 0, sizeof(rtmsg));
|
| 871 |
|
|
memcpy(&rtmsg.rtmsg_dst, pfx, sizeof(struct in6_addr));
|
| 872 |
|
|
rtmsg.rtmsg_dst_len = plen;
|
| 873 |
|
|
rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
|
| 874 |
|
|
rtmsg.rtmsg_ifindex = dev->ifindex;
|
| 875 |
|
|
rtmsg.rtmsg_info = expires;
|
| 876 |
|
|
rtmsg.rtmsg_flags = RTF_UP|flags;
|
| 877 |
|
|
rtmsg.rtmsg_type = RTMSG_NEWROUTE;
|
| 878 |
|
|
|
| 879 |
|
|
/* Prevent useless cloning on PtP SIT.
|
| 880 |
|
|
This thing is done here expecting that the whole
|
| 881 |
|
|
class of non-broadcast devices need not cloning.
|
| 882 |
|
|
*/
|
| 883 |
|
|
if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
|
| 884 |
|
|
rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
|
| 885 |
|
|
|
| 886 |
|
|
ip6_route_add(&rtmsg, NULL);
|
| 887 |
|
|
}
|
| 888 |
|
|
|
| 889 |
|
|
/* Create "default" multicast route to the interface */
|
| 890 |
|
|
|
| 891 |
|
|
static void addrconf_add_mroute(struct net_device *dev)
|
| 892 |
|
|
{
|
| 893 |
|
|
struct in6_rtmsg rtmsg;
|
| 894 |
|
|
|
| 895 |
|
|
memset(&rtmsg, 0, sizeof(rtmsg));
|
| 896 |
|
|
ipv6_addr_set(&rtmsg.rtmsg_dst,
|
| 897 |
|
|
htonl(0xFF000000), 0, 0, 0);
|
| 898 |
|
|
rtmsg.rtmsg_dst_len = 8;
|
| 899 |
|
|
rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
|
| 900 |
|
|
rtmsg.rtmsg_ifindex = dev->ifindex;
|
| 901 |
|
|
rtmsg.rtmsg_flags = RTF_UP;
|
| 902 |
|
|
rtmsg.rtmsg_type = RTMSG_NEWROUTE;
|
| 903 |
|
|
ip6_route_add(&rtmsg, NULL);
|
| 904 |
|
|
}
|
| 905 |
|
|
|
| 906 |
|
|
static void sit_route_add(struct net_device *dev)
|
| 907 |
|
|
{
|
| 908 |
|
|
struct in6_rtmsg rtmsg;
|
| 909 |
|
|
|
| 910 |
|
|
memset(&rtmsg, 0, sizeof(rtmsg));
|
| 911 |
|
|
|
| 912 |
|
|
rtmsg.rtmsg_type = RTMSG_NEWROUTE;
|
| 913 |
|
|
rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
|
| 914 |
|
|
|
| 915 |
|
|
/* prefix length - 96 bits "::d.d.d.d" */
|
| 916 |
|
|
rtmsg.rtmsg_dst_len = 96;
|
| 917 |
|
|
rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP;
|
| 918 |
|
|
rtmsg.rtmsg_ifindex = dev->ifindex;
|
| 919 |
|
|
|
| 920 |
|
|
ip6_route_add(&rtmsg, NULL);
|
| 921 |
|
|
}
|
| 922 |
|
|
|
| 923 |
|
|
static void addrconf_add_lroute(struct net_device *dev)
|
| 924 |
|
|
{
|
| 925 |
|
|
struct in6_addr addr;
|
| 926 |
|
|
|
| 927 |
|
|
ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
|
| 928 |
|
|
addrconf_prefix_route(&addr, 64, dev, 0, 0);
|
| 929 |
|
|
}
|
| 930 |
|
|
|
| 931 |
|
|
static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
|
| 932 |
|
|
{
|
| 933 |
|
|
struct inet6_dev *idev;
|
| 934 |
|
|
|
| 935 |
|
|
ASSERT_RTNL();
|
| 936 |
|
|
|
| 937 |
|
|
if ((idev = ipv6_find_idev(dev)) == NULL)
|
| 938 |
|
|
return NULL;
|
| 939 |
|
|
|
| 940 |
|
|
/* Add default multicast route */
|
| 941 |
|
|
addrconf_add_mroute(dev);
|
| 942 |
|
|
|
| 943 |
|
|
/* Add link local route */
|
| 944 |
|
|
addrconf_add_lroute(dev);
|
| 945 |
|
|
return idev;
|
| 946 |
|
|
}
|
| 947 |
|
|
|
| 948 |
|
|
void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
|
| 949 |
|
|
{
|
| 950 |
|
|
struct prefix_info *pinfo;
|
| 951 |
|
|
struct rt6_info *rt;
|
| 952 |
|
|
__u32 valid_lft;
|
| 953 |
|
|
__u32 prefered_lft;
|
| 954 |
|
|
int addr_type;
|
| 955 |
|
|
unsigned long rt_expires;
|
| 956 |
|
|
struct inet6_dev *in6_dev;
|
| 957 |
|
|
|
| 958 |
|
|
pinfo = (struct prefix_info *) opt;
|
| 959 |
|
|
|
| 960 |
|
|
if (len < sizeof(struct prefix_info)) {
|
| 961 |
|
|
ADBG(("addrconf: prefix option too short\n"));
|
| 962 |
|
|
return;
|
| 963 |
|
|
}
|
| 964 |
|
|
|
| 965 |
|
|
/*
|
| 966 |
|
|
* Validation checks ([ADDRCONF], page 19)
|
| 967 |
|
|
*/
|
| 968 |
|
|
|
| 969 |
|
|
addr_type = ipv6_addr_type(&pinfo->prefix);
|
| 970 |
|
|
|
| 971 |
|
|
if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
|
| 972 |
|
|
return;
|
| 973 |
|
|
|
| 974 |
|
|
valid_lft = ntohl(pinfo->valid);
|
| 975 |
|
|
prefered_lft = ntohl(pinfo->prefered);
|
| 976 |
|
|
|
| 977 |
|
|
if (prefered_lft > valid_lft) {
|
| 978 |
|
|
if (net_ratelimit())
|
| 979 |
|
|
printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
|
| 980 |
|
|
return;
|
| 981 |
|
|
}
|
| 982 |
|
|
|
| 983 |
|
|
in6_dev = in6_dev_get(dev);
|
| 984 |
|
|
|
| 985 |
|
|
if (in6_dev == NULL) {
|
| 986 |
|
|
if (net_ratelimit())
|
| 987 |
|
|
printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
|
| 988 |
|
|
return;
|
| 989 |
|
|
}
|
| 990 |
|
|
|
| 991 |
|
|
/*
|
| 992 |
|
|
* Two things going on here:
|
| 993 |
|
|
* 1) Add routes for on-link prefixes
|
| 994 |
|
|
* 2) Configure prefixes with the auto flag set
|
| 995 |
|
|
*/
|
| 996 |
|
|
|
| 997 |
|
|
/* Avoid arithemtic overflow. Really, we could
|
| 998 |
|
|
save rt_expires in seconds, likely valid_lft,
|
| 999 |
|
|
but it would require division in fib gc, that it
|
| 1000 |
|
|
not good.
|
| 1001 |
|
|
*/
|
| 1002 |
|
|
if (valid_lft >= 0x7FFFFFFF/HZ)
|
| 1003 |
|
|
rt_expires = 0;
|
| 1004 |
|
|
else
|
| 1005 |
|
|
rt_expires = jiffies + valid_lft * HZ;
|
| 1006 |
|
|
|
| 1007 |
|
|
rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
|
| 1008 |
|
|
|
| 1009 |
|
|
if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
|
| 1010 |
|
|
if (rt->rt6i_flags&RTF_EXPIRES) {
|
| 1011 |
|
|
if (pinfo->onlink == 0 || valid_lft == 0) {
|
| 1012 |
|
|
ip6_del_rt(rt, NULL);
|
| 1013 |
|
|
rt = NULL;
|
| 1014 |
|
|
} else {
|
| 1015 |
|
|
rt->rt6i_expires = rt_expires;
|
| 1016 |
|
|
}
|
| 1017 |
|
|
}
|
| 1018 |
|
|
} else if (pinfo->onlink && valid_lft) {
|
| 1019 |
|
|
addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
|
| 1020 |
|
|
dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
|
| 1021 |
|
|
}
|
| 1022 |
|
|
if (rt)
|
| 1023 |
|
|
dst_release(&rt->u.dst);
|
| 1024 |
|
|
|
| 1025 |
|
|
/* Try to figure out our local address for this prefix */
|
| 1026 |
|
|
|
| 1027 |
|
|
if (pinfo->autoconf && in6_dev->cnf.autoconf) {
|
| 1028 |
|
|
struct inet6_ifaddr * ifp;
|
| 1029 |
|
|
struct in6_addr addr;
|
| 1030 |
|
|
int plen;
|
| 1031 |
|
|
|
| 1032 |
|
|
plen = pinfo->prefix_len >> 3;
|
| 1033 |
|
|
|
| 1034 |
|
|
if (pinfo->prefix_len == 64) {
|
| 1035 |
|
|
memcpy(&addr, &pinfo->prefix, 8);
|
| 1036 |
|
|
if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
|
| 1037 |
|
|
ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
|
| 1038 |
|
|
in6_dev_put(in6_dev);
|
| 1039 |
|
|
return;
|
| 1040 |
|
|
}
|
| 1041 |
|
|
goto ok;
|
| 1042 |
|
|
}
|
| 1043 |
|
|
if (net_ratelimit())
|
| 1044 |
|
|
printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
|
| 1045 |
|
|
pinfo->prefix_len);
|
| 1046 |
|
|
in6_dev_put(in6_dev);
|
| 1047 |
|
|
return;
|
| 1048 |
|
|
|
| 1049 |
|
|
ok:
|
| 1050 |
|
|
|
| 1051 |
|
|
ifp = ipv6_get_ifaddr(&addr, dev);
|
| 1052 |
|
|
|
| 1053 |
|
|
if (ifp == NULL && valid_lft) {
|
| 1054 |
|
|
/* Do not allow to create too much of autoconfigured
|
| 1055 |
|
|
* addresses; this would be too easy way to crash kernel.
|
| 1056 |
|
|
*/
|
| 1057 |
|
|
if (ipv6_count_addresses(in6_dev) < IPV6_MAX_ADDRESSES)
|
| 1058 |
|
|
ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
|
| 1059 |
|
|
addr_type&IPV6_ADDR_SCOPE_MASK, 0);
|
| 1060 |
|
|
|
| 1061 |
|
|
if (IS_ERR(ifp)) {
|
| 1062 |
|
|
in6_dev_put(in6_dev);
|
| 1063 |
|
|
return;
|
| 1064 |
|
|
}
|
| 1065 |
|
|
|
| 1066 |
|
|
addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
|
| 1067 |
|
|
}
|
| 1068 |
|
|
|
| 1069 |
|
|
if (ifp && valid_lft == 0) {
|
| 1070 |
|
|
ipv6_del_addr(ifp);
|
| 1071 |
|
|
ifp = NULL;
|
| 1072 |
|
|
}
|
| 1073 |
|
|
|
| 1074 |
|
|
if (ifp) {
|
| 1075 |
|
|
int flags;
|
| 1076 |
|
|
|
| 1077 |
|
|
spin_lock(&ifp->lock);
|
| 1078 |
|
|
ifp->valid_lft = valid_lft;
|
| 1079 |
|
|
ifp->prefered_lft = prefered_lft;
|
| 1080 |
|
|
ifp->tstamp = jiffies;
|
| 1081 |
|
|
flags = ifp->flags;
|
| 1082 |
|
|
ifp->flags &= ~IFA_F_DEPRECATED;
|
| 1083 |
|
|
spin_unlock(&ifp->lock);
|
| 1084 |
|
|
|
| 1085 |
|
|
if (!(flags&IFA_F_TENTATIVE))
|
| 1086 |
|
|
ipv6_ifa_notify((flags&IFA_F_DEPRECATED) ?
|
| 1087 |
|
|
|
| 1088 |
|
|
in6_ifa_put(ifp);
|
| 1089 |
|
|
addrconf_verify(0);
|
| 1090 |
|
|
}
|
| 1091 |
|
|
}
|
| 1092 |
|
|
in6_dev_put(in6_dev);
|
| 1093 |
|
|
}
|
| 1094 |
|
|
|
| 1095 |
|
|
/*
|
| 1096 |
|
|
* Set destination address.
|
| 1097 |
|
|
* Special case for SIT interfaces where we create a new "virtual"
|
| 1098 |
|
|
* device.
|
| 1099 |
|
|
*/
|
| 1100 |
|
|
int addrconf_set_dstaddr(void *arg)
|
| 1101 |
|
|
{
|
| 1102 |
|
|
struct in6_ifreq ireq;
|
| 1103 |
|
|
struct net_device *dev;
|
| 1104 |
|
|
int err = -EINVAL;
|
| 1105 |
|
|
|
| 1106 |
|
|
rtnl_lock();
|
| 1107 |
|
|
|
| 1108 |
|
|
err = -EFAULT;
|
| 1109 |
|
|
if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
|
| 1110 |
|
|
goto err_exit;
|
| 1111 |
|
|
|
| 1112 |
|
|
dev = __dev_get_by_index(ireq.ifr6_ifindex);
|
| 1113 |
|
|
|
| 1114 |
|
|
err = -ENODEV;
|
| 1115 |
|
|
if (dev == NULL)
|
| 1116 |
|
|
goto err_exit;
|
| 1117 |
|
|
|
| 1118 |
|
|
if (dev->type == ARPHRD_SIT) {
|
| 1119 |
|
|
struct ifreq ifr;
|
| 1120 |
|
|
mm_segment_t oldfs;
|
| 1121 |
|
|
struct ip_tunnel_parm p;
|
| 1122 |
|
|
|
| 1123 |
|
|
err = -EADDRNOTAVAIL;
|
| 1124 |
|
|
if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
|
| 1125 |
|
|
goto err_exit;
|
| 1126 |
|
|
|
| 1127 |
|
|
memset(&p, 0, sizeof(p));
|
| 1128 |
|
|
p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
|
| 1129 |
|
|
p.iph.saddr = 0;
|
| 1130 |
|
|
p.iph.version = 4;
|
| 1131 |
|
|
p.iph.ihl = 5;
|
| 1132 |
|
|
p.iph.protocol = IPPROTO_IPV6;
|
| 1133 |
|
|
p.iph.ttl = 64;
|
| 1134 |
|
|
ifr.ifr_ifru.ifru_data = (void*)&p;
|
| 1135 |
|
|
|
| 1136 |
|
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
| 1137 |
|
|
err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
|
| 1138 |
|
|
set_fs(oldfs);
|
| 1139 |
|
|
|
| 1140 |
|
|
if (err == 0) {
|
| 1141 |
|
|
err = -ENOBUFS;
|
| 1142 |
|
|
if ((dev = __dev_get_by_name(p.name)) == NULL)
|
| 1143 |
|
|
goto err_exit;
|
| 1144 |
|
|
err = dev_open(dev);
|
| 1145 |
|
|
}
|
| 1146 |
|
|
}
|
| 1147 |
|
|
|
| 1148 |
|
|
err_exit:
|
| 1149 |
|
|
rtnl_unlock();
|
| 1150 |
|
|
return err;
|
| 1151 |
|
|
}
|
| 1152 |
|
|
|
| 1153 |
|
|
/*
|
| 1154 |
|
|
* Manual configuration of address on an interface
|
| 1155 |
|
|
*/
|
| 1156 |
|
|
static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
|
| 1157 |
|
|
{
|
| 1158 |
|
|
struct inet6_ifaddr *ifp;
|
| 1159 |
|
|
struct inet6_dev *idev;
|
| 1160 |
|
|
struct net_device *dev;
|
| 1161 |
|
|
int scope;
|
| 1162 |
|
|
|
| 1163 |
|
|
ASSERT_RTNL();
|
| 1164 |
|
|
|
| 1165 |
|
|
if ((dev = __dev_get_by_index(ifindex)) == NULL)
|
| 1166 |
|
|
return -ENODEV;
|
| 1167 |
|
|
|
| 1168 |
|
|
if (!(dev->flags&IFF_UP))
|
| 1169 |
|
|
return -ENETDOWN;
|
| 1170 |
|
|
|
| 1171 |
|
|
if ((idev = addrconf_add_dev(dev)) == NULL)
|
| 1172 |
|
|
return -ENOBUFS;
|
| 1173 |
|
|
|
| 1174 |
|
|
scope = ipv6_addr_scope(pfx);
|
| 1175 |
|
|
|
| 1176 |
|
|
ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
|
| 1177 |
|
|
if (!IS_ERR(ifp)) {
|
| 1178 |
|
|
addrconf_dad_start(ifp, 0);
|
| 1179 |
|
|
in6_ifa_put(ifp);
|
| 1180 |
|
|
return 0;
|
| 1181 |
|
|
}
|
| 1182 |
|
|
|
| 1183 |
|
|
return PTR_ERR(ifp);
|
| 1184 |
|
|
}
|
| 1185 |
|
|
|
| 1186 |
|
|
static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
|
| 1187 |
|
|
{
|
| 1188 |
|
|
struct inet6_ifaddr *ifp;
|
| 1189 |
|
|
struct inet6_dev *idev;
|
| 1190 |
|
|
struct net_device *dev;
|
| 1191 |
|
|
|
| 1192 |
|
|
if ((dev = __dev_get_by_index(ifindex)) == NULL)
|
| 1193 |
|
|
return -ENODEV;
|
| 1194 |
|
|
|
| 1195 |
|
|
if ((idev = __in6_dev_get(dev)) == NULL)
|
| 1196 |
|
|
return -ENXIO;
|
| 1197 |
|
|
|
| 1198 |
|
|
read_lock_bh(&idev->lock);
|
| 1199 |
|
|
for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
|
| 1200 |
|
|
if (ifp->prefix_len == plen &&
|
| 1201 |
|
|
(!memcmp(pfx, &ifp->addr, sizeof(struct in6_addr)))) {
|
| 1202 |
|
|
in6_ifa_hold(ifp);
|
| 1203 |
|
|
read_unlock_bh(&idev->lock);
|
| 1204 |
|
|
|
| 1205 |
|
|
ipv6_del_addr(ifp);
|
| 1206 |
|
|
|
| 1207 |
|
|
/* If the last address is deleted administratively,
|
| 1208 |
|
|
disable IPv6 on this interface.
|
| 1209 |
|
|
*/
|
| 1210 |
|
|
if (idev->addr_list == NULL)
|
| 1211 |
|
|
addrconf_ifdown(idev->dev, 1);
|
| 1212 |
|
|
return 0;
|
| 1213 |
|
|
}
|
| 1214 |
|
|
}
|
| 1215 |
|
|
read_unlock_bh(&idev->lock);
|
| 1216 |
|
|
return -EADDRNOTAVAIL;
|
| 1217 |
|
|
}
|
| 1218 |
|
|
|
| 1219 |
|
|
|
| 1220 |
|
|
int addrconf_add_ifaddr(void *arg)
|
| 1221 |
|
|
{
|
| 1222 |
|
|
struct in6_ifreq ireq;
|
| 1223 |
|
|
int err;
|
| 1224 |
|
|
|
| 1225 |
|
|
if (!capable(CAP_NET_ADMIN))
|
| 1226 |
|
|
return -EPERM;
|
| 1227 |
|
|
|
| 1228 |
|
|
if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
|
| 1229 |
|
|
return -EFAULT;
|
| 1230 |
|
|
|
| 1231 |
|
|
rtnl_lock();
|
| 1232 |
|
|
err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
|
| 1233 |
|
|
rtnl_unlock();
|
| 1234 |
|
|
return err;
|
| 1235 |
|
|
}
|
| 1236 |
|
|
|
| 1237 |
|
|
int addrconf_del_ifaddr(void *arg)
|
| 1238 |
|
|
{
|
| 1239 |
|
|
struct in6_ifreq ireq;
|
| 1240 |
|
|
int err;
|
| 1241 |
|
|
|
| 1242 |
|
|
if (!capable(CAP_NET_ADMIN))
|
| 1243 |
|
|
return -EPERM;
|
| 1244 |
|
|
|
| 1245 |
|
|
if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
|
| 1246 |
|
|
return -EFAULT;
|
| 1247 |
|
|
|
| 1248 |
|
|
rtnl_lock();
|
| 1249 |
|
|
err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
|
| 1250 |
|
|
rtnl_unlock();
|
| 1251 |
|
|
return err;
|
| 1252 |
|
|
}
|
| 1253 |
|
|
|
| 1254 |
|
|
static void sit_add_v4_addrs(struct inet6_dev *idev)
|
| 1255 |
|
|
{
|
| 1256 |
|
|
struct inet6_ifaddr * ifp;
|
| 1257 |
|
|
struct in6_addr addr;
|
| 1258 |
|
|
struct net_device *dev;
|
| 1259 |
|
|
int scope;
|
| 1260 |
|
|
|
| 1261 |
|
|
ASSERT_RTNL();
|
| 1262 |
|
|
|
| 1263 |
|
|
memset(&addr, 0, sizeof(struct in6_addr));
|
| 1264 |
|
|
memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
|
| 1265 |
|
|
|
| 1266 |
|
|
if (idev->dev->flags&IFF_POINTOPOINT) {
|
| 1267 |
|
|
addr.s6_addr32[0] = htonl(0xfe800000);
|
| 1268 |
|
|
scope = IFA_LINK;
|
| 1269 |
|
|
} else {
|
| 1270 |
|
|
scope = IPV6_ADDR_COMPATv4;
|
| 1271 |
|
|
}
|
| 1272 |
|
|
|
| 1273 |
|
|
if (addr.s6_addr32[3]) {
|
| 1274 |
|
|
ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
|
| 1275 |
|
|
if (!IS_ERR(ifp)) {
|
| 1276 |
|
|
spin_lock_bh(&ifp->lock);
|
| 1277 |
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
| 1278 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1279 |
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
| 1280 |
|
|
in6_ifa_put(ifp);
|
| 1281 |
|
|
}
|
| 1282 |
|
|
return;
|
| 1283 |
|
|
}
|
| 1284 |
|
|
|
| 1285 |
|
|
for (dev = dev_base; dev != NULL; dev = dev->next) {
|
| 1286 |
|
|
struct in_device * in_dev = __in_dev_get(dev);
|
| 1287 |
|
|
if (in_dev && (dev->flags & IFF_UP)) {
|
| 1288 |
|
|
struct in_ifaddr * ifa;
|
| 1289 |
|
|
|
| 1290 |
|
|
int flag = scope;
|
| 1291 |
|
|
|
| 1292 |
|
|
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
|
| 1293 |
|
|
int plen;
|
| 1294 |
|
|
|
| 1295 |
|
|
addr.s6_addr32[3] = ifa->ifa_local;
|
| 1296 |
|
|
|
| 1297 |
|
|
if (ifa->ifa_scope == RT_SCOPE_LINK)
|
| 1298 |
|
|
continue;
|
| 1299 |
|
|
if (ifa->ifa_scope >= RT_SCOPE_HOST) {
|
| 1300 |
|
|
if (idev->dev->flags&IFF_POINTOPOINT)
|
| 1301 |
|
|
continue;
|
| 1302 |
|
|
flag |= IFA_HOST;
|
| 1303 |
|
|
}
|
| 1304 |
|
|
if (idev->dev->flags&IFF_POINTOPOINT)
|
| 1305 |
|
|
plen = 64;
|
| 1306 |
|
|
else
|
| 1307 |
|
|
plen = 96;
|
| 1308 |
|
|
|
| 1309 |
|
|
ifp = ipv6_add_addr(idev, &addr, plen, flag,
|
| 1310 |
|
|
IFA_F_PERMANENT);
|
| 1311 |
|
|
if (!IS_ERR(ifp)) {
|
| 1312 |
|
|
spin_lock_bh(&ifp->lock);
|
| 1313 |
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
| 1314 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1315 |
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
| 1316 |
|
|
in6_ifa_put(ifp);
|
| 1317 |
|
|
}
|
| 1318 |
|
|
}
|
| 1319 |
|
|
}
|
| 1320 |
|
|
}
|
| 1321 |
|
|
}
|
| 1322 |
|
|
|
| 1323 |
|
|
static void init_loopback(struct net_device *dev)
|
| 1324 |
|
|
{
|
| 1325 |
|
|
struct inet6_dev *idev;
|
| 1326 |
|
|
struct inet6_ifaddr * ifp;
|
| 1327 |
|
|
|
| 1328 |
|
|
/* ::1 */
|
| 1329 |
|
|
|
| 1330 |
|
|
ASSERT_RTNL();
|
| 1331 |
|
|
|
| 1332 |
|
|
if ((idev = ipv6_find_idev(dev)) == NULL) {
|
| 1333 |
|
|
printk(KERN_DEBUG "init loopback: add_dev failed\n");
|
| 1334 |
|
|
return;
|
| 1335 |
|
|
}
|
| 1336 |
|
|
|
| 1337 |
|
|
ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
|
| 1338 |
|
|
if (!IS_ERR(ifp)) {
|
| 1339 |
|
|
spin_lock_bh(&ifp->lock);
|
| 1340 |
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
| 1341 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1342 |
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
| 1343 |
|
|
in6_ifa_put(ifp);
|
| 1344 |
|
|
}
|
| 1345 |
|
|
}
|
| 1346 |
|
|
|
| 1347 |
|
|
static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
|
| 1348 |
|
|
{
|
| 1349 |
|
|
struct inet6_ifaddr * ifp;
|
| 1350 |
|
|
|
| 1351 |
|
|
ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
|
| 1352 |
|
|
if (!IS_ERR(ifp)) {
|
| 1353 |
|
|
addrconf_dad_start(ifp, 0);
|
| 1354 |
|
|
in6_ifa_put(ifp);
|
| 1355 |
|
|
}
|
| 1356 |
|
|
}
|
| 1357 |
|
|
|
| 1358 |
|
|
static void addrconf_dev_config(struct net_device *dev)
|
| 1359 |
|
|
{
|
| 1360 |
|
|
struct in6_addr addr;
|
| 1361 |
|
|
struct inet6_dev * idev;
|
| 1362 |
|
|
|
| 1363 |
|
|
ASSERT_RTNL();
|
| 1364 |
|
|
|
| 1365 |
|
|
if ((dev->type != ARPHRD_ETHER) &&
|
| 1366 |
|
|
(dev->type != ARPHRD_FDDI) &&
|
| 1367 |
|
|
(dev->type != ARPHRD_IEEE802_TR) &&
|
| 1368 |
|
|
(dev->type != ARPHRD_ARCNET)) {
|
| 1369 |
|
|
/* Alas, we support only Ethernet autoconfiguration. */
|
| 1370 |
|
|
return;
|
| 1371 |
|
|
}
|
| 1372 |
|
|
|
| 1373 |
|
|
idev = addrconf_add_dev(dev);
|
| 1374 |
|
|
if (idev == NULL)
|
| 1375 |
|
|
return;
|
| 1376 |
|
|
|
| 1377 |
|
|
memset(&addr, 0, sizeof(struct in6_addr));
|
| 1378 |
|
|
addr.s6_addr32[0] = htonl(0xFE800000);
|
| 1379 |
|
|
|
| 1380 |
|
|
if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
|
| 1381 |
|
|
addrconf_add_linklocal(idev, &addr);
|
| 1382 |
|
|
}
|
| 1383 |
|
|
|
| 1384 |
|
|
static void addrconf_sit_config(struct net_device *dev)
|
| 1385 |
|
|
{
|
| 1386 |
|
|
struct inet6_dev *idev;
|
| 1387 |
|
|
|
| 1388 |
|
|
ASSERT_RTNL();
|
| 1389 |
|
|
|
| 1390 |
|
|
/*
|
| 1391 |
|
|
* Configure the tunnel with one of our IPv4
|
| 1392 |
|
|
* addresses... we should configure all of
|
| 1393 |
|
|
* our v4 addrs in the tunnel
|
| 1394 |
|
|
*/
|
| 1395 |
|
|
|
| 1396 |
|
|
if ((idev = ipv6_find_idev(dev)) == NULL) {
|
| 1397 |
|
|
printk(KERN_DEBUG "init sit: add_dev failed\n");
|
| 1398 |
|
|
return;
|
| 1399 |
|
|
}
|
| 1400 |
|
|
|
| 1401 |
|
|
sit_add_v4_addrs(idev);
|
| 1402 |
|
|
|
| 1403 |
|
|
if (dev->flags&IFF_POINTOPOINT) {
|
| 1404 |
|
|
addrconf_add_mroute(dev);
|
| 1405 |
|
|
addrconf_add_lroute(dev);
|
| 1406 |
|
|
} else
|
| 1407 |
|
|
sit_route_add(dev);
|
| 1408 |
|
|
}
|
| 1409 |
|
|
|
| 1410 |
|
|
|
| 1411 |
|
|
int addrconf_notify(struct notifier_block *this, unsigned long event,
|
| 1412 |
|
|
void * data)
|
| 1413 |
|
|
{
|
| 1414 |
|
|
struct net_device *dev = (struct net_device *) data;
|
| 1415 |
|
|
struct inet6_dev *idev = __in6_dev_get(dev);
|
| 1416 |
|
|
|
| 1417 |
|
|
switch(event) {
|
| 1418 |
|
|
case NETDEV_UP:
|
| 1419 |
|
|
switch(dev->type) {
|
| 1420 |
|
|
case ARPHRD_SIT:
|
| 1421 |
|
|
addrconf_sit_config(dev);
|
| 1422 |
|
|
break;
|
| 1423 |
|
|
|
| 1424 |
|
|
case ARPHRD_LOOPBACK:
|
| 1425 |
|
|
init_loopback(dev);
|
| 1426 |
|
|
break;
|
| 1427 |
|
|
|
| 1428 |
|
|
default:
|
| 1429 |
|
|
addrconf_dev_config(dev);
|
| 1430 |
|
|
break;
|
| 1431 |
|
|
};
|
| 1432 |
|
|
if (idev) {
|
| 1433 |
|
|
/* If the MTU changed during the interface down, when the
|
| 1434 |
|
|
interface up, the changed MTU must be reflected in the
|
| 1435 |
|
|
idev as well as routers.
|
| 1436 |
|
|
*/
|
| 1437 |
|
|
if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
|
| 1438 |
|
|
rt6_mtu_change(dev, dev->mtu);
|
| 1439 |
|
|
idev->cnf.mtu6 = dev->mtu;
|
| 1440 |
|
|
}
|
| 1441 |
|
|
/* If the changed mtu during down is lower than IPV6_MIN_MTU
|
| 1442 |
|
|
stop IPv6 on this interface.
|
| 1443 |
|
|
*/
|
| 1444 |
|
|
if (dev->mtu < IPV6_MIN_MTU)
|
| 1445 |
|
|
addrconf_ifdown(dev, event != NETDEV_DOWN);
|
| 1446 |
|
|
}
|
| 1447 |
|
|
break;
|
| 1448 |
|
|
|
| 1449 |
|
|
case NETDEV_CHANGEMTU:
|
| 1450 |
|
|
if ( idev && dev->mtu >= IPV6_MIN_MTU) {
|
| 1451 |
|
|
rt6_mtu_change(dev, dev->mtu);
|
| 1452 |
|
|
idev->cnf.mtu6 = dev->mtu;
|
| 1453 |
|
|
break;
|
| 1454 |
|
|
}
|
| 1455 |
|
|
|
| 1456 |
|
|
/* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
|
| 1457 |
|
|
|
| 1458 |
|
|
case NETDEV_DOWN:
|
| 1459 |
|
|
case NETDEV_UNREGISTER:
|
| 1460 |
|
|
/*
|
| 1461 |
|
|
* Remove all addresses from this interface.
|
| 1462 |
|
|
*/
|
| 1463 |
|
|
addrconf_ifdown(dev, event != NETDEV_DOWN);
|
| 1464 |
|
|
break;
|
| 1465 |
|
|
case NETDEV_CHANGE:
|
| 1466 |
|
|
break;
|
| 1467 |
|
|
};
|
| 1468 |
|
|
|
| 1469 |
|
|
return NOTIFY_OK;
|
| 1470 |
|
|
}
|
| 1471 |
|
|
|
| 1472 |
|
|
static int addrconf_ifdown(struct net_device *dev, int how)
|
| 1473 |
|
|
{
|
| 1474 |
|
|
struct inet6_dev *idev;
|
| 1475 |
|
|
struct inet6_ifaddr *ifa, **bifa;
|
| 1476 |
|
|
int i;
|
| 1477 |
|
|
|
| 1478 |
|
|
ASSERT_RTNL();
|
| 1479 |
|
|
|
| 1480 |
|
|
rt6_ifdown(dev);
|
| 1481 |
|
|
neigh_ifdown(&nd_tbl, dev);
|
| 1482 |
|
|
|
| 1483 |
|
|
idev = __in6_dev_get(dev);
|
| 1484 |
|
|
if (idev == NULL)
|
| 1485 |
|
|
return -ENODEV;
|
| 1486 |
|
|
|
| 1487 |
|
|
/* Step 1: remove reference to ipv6 device from parent device.
|
| 1488 |
|
|
Do not dev_put!
|
| 1489 |
|
|
*/
|
| 1490 |
|
|
if (how == 1) {
|
| 1491 |
|
|
write_lock_bh(&addrconf_lock);
|
| 1492 |
|
|
dev->ip6_ptr = NULL;
|
| 1493 |
|
|
idev->dead = 1;
|
| 1494 |
|
|
write_unlock_bh(&addrconf_lock);
|
| 1495 |
|
|
}
|
| 1496 |
|
|
|
| 1497 |
|
|
/* Step 2: clear hash table */
|
| 1498 |
|
|
for (i=0; i<IN6_ADDR_HSIZE; i++) {
|
| 1499 |
|
|
bifa = &inet6_addr_lst[i];
|
| 1500 |
|
|
|
| 1501 |
|
|
write_lock_bh(&addrconf_hash_lock);
|
| 1502 |
|
|
while ((ifa = *bifa) != NULL) {
|
| 1503 |
|
|
if (ifa->idev == idev) {
|
| 1504 |
|
|
*bifa = ifa->lst_next;
|
| 1505 |
|
|
ifa->lst_next = NULL;
|
| 1506 |
|
|
addrconf_del_timer(ifa);
|
| 1507 |
|
|
in6_ifa_put(ifa);
|
| 1508 |
|
|
continue;
|
| 1509 |
|
|
}
|
| 1510 |
|
|
bifa = &ifa->lst_next;
|
| 1511 |
|
|
}
|
| 1512 |
|
|
write_unlock_bh(&addrconf_hash_lock);
|
| 1513 |
|
|
}
|
| 1514 |
|
|
|
| 1515 |
|
|
/* Step 3: clear address list */
|
| 1516 |
|
|
|
| 1517 |
|
|
write_lock_bh(&idev->lock);
|
| 1518 |
|
|
while ((ifa = idev->addr_list) != NULL) {
|
| 1519 |
|
|
idev->addr_list = ifa->if_next;
|
| 1520 |
|
|
ifa->if_next = NULL;
|
| 1521 |
|
|
ifa->dead = 1;
|
| 1522 |
|
|
addrconf_del_timer(ifa);
|
| 1523 |
|
|
write_unlock_bh(&idev->lock);
|
| 1524 |
|
|
|
| 1525 |
|
|
ipv6_ifa_notify(RTM_DELADDR, ifa);
|
| 1526 |
|
|
in6_ifa_put(ifa);
|
| 1527 |
|
|
|
| 1528 |
|
|
write_lock_bh(&idev->lock);
|
| 1529 |
|
|
}
|
| 1530 |
|
|
write_unlock_bh(&idev->lock);
|
| 1531 |
|
|
|
| 1532 |
|
|
/* Step 4: Discard multicast list */
|
| 1533 |
|
|
|
| 1534 |
|
|
if (how == 1)
|
| 1535 |
|
|
ipv6_mc_destroy_dev(idev);
|
| 1536 |
|
|
else
|
| 1537 |
|
|
ipv6_mc_down(idev);
|
| 1538 |
|
|
|
| 1539 |
|
|
/* Shot the device (if unregistered) */
|
| 1540 |
|
|
|
| 1541 |
|
|
if (how == 1) {
|
| 1542 |
|
|
neigh_parms_release(&nd_tbl, idev->nd_parms);
|
| 1543 |
|
|
#ifdef CONFIG_SYSCTL
|
| 1544 |
|
|
addrconf_sysctl_unregister(&idev->cnf);
|
| 1545 |
|
|
#endif
|
| 1546 |
|
|
in6_dev_put(idev);
|
| 1547 |
|
|
}
|
| 1548 |
|
|
return 0;
|
| 1549 |
|
|
}
|
| 1550 |
|
|
|
| 1551 |
|
|
static void addrconf_rs_timer(unsigned long data)
|
| 1552 |
|
|
{
|
| 1553 |
|
|
struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
|
| 1554 |
|
|
|
| 1555 |
|
|
if (ifp->idev->cnf.forwarding)
|
| 1556 |
|
|
goto out;
|
| 1557 |
|
|
|
| 1558 |
|
|
if (ifp->idev->if_flags & IF_RA_RCVD) {
|
| 1559 |
|
|
/*
|
| 1560 |
|
|
* Announcement received after solicitation
|
| 1561 |
|
|
* was sent
|
| 1562 |
|
|
*/
|
| 1563 |
|
|
goto out;
|
| 1564 |
|
|
}
|
| 1565 |
|
|
|
| 1566 |
|
|
spin_lock(&ifp->lock);
|
| 1567 |
|
|
if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
|
| 1568 |
|
|
struct in6_addr all_routers;
|
| 1569 |
|
|
|
| 1570 |
|
|
/* The wait after the last probe can be shorter */
|
| 1571 |
|
|
addrconf_mod_timer(ifp, AC_RS,
|
| 1572 |
|
|
(ifp->probes == ifp->idev->cnf.rtr_solicits) ?
|
| 1573 |
|
|
ifp->idev->cnf.rtr_solicit_delay :
|
| 1574 |
|
|
ifp->idev->cnf.rtr_solicit_interval);
|
| 1575 |
|
|
spin_unlock(&ifp->lock);
|
| 1576 |
|
|
|
| 1577 |
|
|
ipv6_addr_all_routers(&all_routers);
|
| 1578 |
|
|
|
| 1579 |
|
|
ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
|
| 1580 |
|
|
} else {
|
| 1581 |
|
|
struct in6_rtmsg rtmsg;
|
| 1582 |
|
|
|
| 1583 |
|
|
spin_unlock(&ifp->lock);
|
| 1584 |
|
|
|
| 1585 |
|
|
printk(KERN_DEBUG "%s: no IPv6 routers present\n",
|
| 1586 |
|
|
ifp->idev->dev->name);
|
| 1587 |
|
|
|
| 1588 |
|
|
memset(&rtmsg, 0, sizeof(struct in6_rtmsg));
|
| 1589 |
|
|
rtmsg.rtmsg_type = RTMSG_NEWROUTE;
|
| 1590 |
|
|
rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
|
| 1591 |
|
|
rtmsg.rtmsg_flags = (RTF_ALLONLINK | RTF_DEFAULT | RTF_UP);
|
| 1592 |
|
|
|
| 1593 |
|
|
rtmsg.rtmsg_ifindex = ifp->idev->dev->ifindex;
|
| 1594 |
|
|
|
| 1595 |
|
|
ip6_route_add(&rtmsg, NULL);
|
| 1596 |
|
|
}
|
| 1597 |
|
|
|
| 1598 |
|
|
out:
|
| 1599 |
|
|
in6_ifa_put(ifp);
|
| 1600 |
|
|
}
|
| 1601 |
|
|
|
| 1602 |
|
|
/*
|
| 1603 |
|
|
* Duplicate Address Detection
|
| 1604 |
|
|
*/
|
| 1605 |
|
|
static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
|
| 1606 |
|
|
{
|
| 1607 |
|
|
struct net_device *dev;
|
| 1608 |
|
|
unsigned long rand_num;
|
| 1609 |
|
|
|
| 1610 |
|
|
dev = ifp->idev->dev;
|
| 1611 |
|
|
|
| 1612 |
|
|
addrconf_join_solict(dev, &ifp->addr);
|
| 1613 |
|
|
|
| 1614 |
|
|
if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
|
| 1615 |
|
|
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, flags);
|
| 1616 |
|
|
|
| 1617 |
|
|
net_srandom(ifp->addr.s6_addr32[3]);
|
| 1618 |
|
|
rand_num = net_random() % (ifp->idev->cnf.rtr_solicit_delay ? : 1);
|
| 1619 |
|
|
|
| 1620 |
|
|
spin_lock_bh(&ifp->lock);
|
| 1621 |
|
|
|
| 1622 |
|
|
if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
|
| 1623 |
|
|
!(ifp->flags&IFA_F_TENTATIVE)) {
|
| 1624 |
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
| 1625 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1626 |
|
|
|
| 1627 |
|
|
addrconf_dad_completed(ifp);
|
| 1628 |
|
|
return;
|
| 1629 |
|
|
}
|
| 1630 |
|
|
|
| 1631 |
|
|
ifp->probes = ifp->idev->cnf.dad_transmits;
|
| 1632 |
|
|
addrconf_mod_timer(ifp, AC_DAD, rand_num);
|
| 1633 |
|
|
|
| 1634 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1635 |
|
|
}
|
| 1636 |
|
|
|
| 1637 |
|
|
static void addrconf_dad_timer(unsigned long data)
|
| 1638 |
|
|
{
|
| 1639 |
|
|
struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
|
| 1640 |
|
|
struct in6_addr unspec;
|
| 1641 |
|
|
struct in6_addr mcaddr;
|
| 1642 |
|
|
|
| 1643 |
|
|
spin_lock_bh(&ifp->lock);
|
| 1644 |
|
|
if (ifp->probes == 0) {
|
| 1645 |
|
|
/*
|
| 1646 |
|
|
* DAD was successful
|
| 1647 |
|
|
*/
|
| 1648 |
|
|
|
| 1649 |
|
|
ifp->flags &= ~IFA_F_TENTATIVE;
|
| 1650 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1651 |
|
|
|
| 1652 |
|
|
addrconf_dad_completed(ifp);
|
| 1653 |
|
|
|
| 1654 |
|
|
in6_ifa_put(ifp);
|
| 1655 |
|
|
return;
|
| 1656 |
|
|
}
|
| 1657 |
|
|
|
| 1658 |
|
|
ifp->probes--;
|
| 1659 |
|
|
addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
|
| 1660 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1661 |
|
|
|
| 1662 |
|
|
/* send a neighbour solicitation for our addr */
|
| 1663 |
|
|
memset(&unspec, 0, sizeof(unspec));
|
| 1664 |
|
|
addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
|
| 1665 |
|
|
ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
|
| 1666 |
|
|
|
| 1667 |
|
|
in6_ifa_put(ifp);
|
| 1668 |
|
|
}
|
| 1669 |
|
|
|
| 1670 |
|
|
static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
|
| 1671 |
|
|
{
|
| 1672 |
|
|
struct net_device * dev = ifp->idev->dev;
|
| 1673 |
|
|
|
| 1674 |
|
|
/*
|
| 1675 |
|
|
* Configure the address for reception. Now it is valid.
|
| 1676 |
|
|
*/
|
| 1677 |
|
|
|
| 1678 |
|
|
ipv6_ifa_notify(RTM_NEWADDR, ifp);
|
| 1679 |
|
|
|
| 1680 |
|
|
/* If added prefix is link local and forwarding is off,
|
| 1681 |
|
|
start sending router solicitations.
|
| 1682 |
|
|
*/
|
| 1683 |
|
|
|
| 1684 |
|
|
if (ifp->idev->cnf.forwarding == 0 &&
|
| 1685 |
|
|
(dev->flags&IFF_LOOPBACK) == 0 &&
|
| 1686 |
|
|
(ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
|
| 1687 |
|
|
struct in6_addr all_routers;
|
| 1688 |
|
|
|
| 1689 |
|
|
ipv6_addr_all_routers(&all_routers);
|
| 1690 |
|
|
|
| 1691 |
|
|
/*
|
| 1692 |
|
|
* If a host as already performed a random delay
|
| 1693 |
|
|
* [...] as part of DAD [...] there is no need
|
| 1694 |
|
|
* to delay again before sending the first RS
|
| 1695 |
|
|
*/
|
| 1696 |
|
|
ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
|
| 1697 |
|
|
|
| 1698 |
|
|
spin_lock_bh(&ifp->lock);
|
| 1699 |
|
|
ifp->probes = 1;
|
| 1700 |
|
|
ifp->idev->if_flags |= IF_RS_SENT;
|
| 1701 |
|
|
addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
|
| 1702 |
|
|
spin_unlock_bh(&ifp->lock);
|
| 1703 |
|
|
}
|
| 1704 |
|
|
|
| 1705 |
|
|
if (ifp->idev->cnf.forwarding) {
|
| 1706 |
|
|
struct in6_addr addr;
|
| 1707 |
|
|
|
| 1708 |
|
|
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
|
| 1709 |
|
|
if (!ipv6_addr_any(&addr))
|
| 1710 |
|
|
ipv6_dev_ac_inc(ifp->idev->dev, &addr);
|
| 1711 |
|
|
}
|
| 1712 |
|
|
}
|
| 1713 |
|
|
|
| 1714 |
|
|
#ifdef CONFIG_PROC_FS
|
| 1715 |
|
|
static int iface_proc_info(char *buffer, char **start, off_t offset,
|
| 1716 |
|
|
int length)
|
| 1717 |
|
|
{
|
| 1718 |
|
|
struct inet6_ifaddr *ifp;
|
| 1719 |
|
|
int i;
|
| 1720 |
|
|
int len = 0;
|
| 1721 |
|
|
off_t pos=0;
|
| 1722 |
|
|
off_t begin=0;
|
| 1723 |
|
|
|
| 1724 |
|
|
for (i=0; i < IN6_ADDR_HSIZE; i++) {
|
| 1725 |
|
|
read_lock_bh(&addrconf_hash_lock);
|
| 1726 |
|
|
for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
|
| 1727 |
|
|
int j;
|
| 1728 |
|
|
|
| 1729 |
|
|
for (j=0; j<16; j++) {
|
| 1730 |
|
|
sprintf(buffer + len, "%02x",
|
| 1731 |
|
|
ifp->addr.s6_addr[j]);
|
| 1732 |
|
|
len += 2;
|
| 1733 |
|
|
}
|
| 1734 |
|
|
|
| 1735 |
|
|
len += sprintf(buffer + len,
|
| 1736 |
|
|
" %02x %02x %02x %02x %8s\n",
|
| 1737 |
|
|
ifp->idev->dev->ifindex,
|
| 1738 |
|
|
ifp->prefix_len,
|
| 1739 |
|
|
ifp->scope,
|
| 1740 |
|
|
ifp->flags,
|
| 1741 |
|
|
ifp->idev->dev->name);
|
| 1742 |
|
|
pos=begin+len;
|
| 1743 |
|
|
if(pos<offset) {
|
| 1744 |
|
|
len=0;
|
| 1745 |
|
|
begin=pos;
|
| 1746 |
|
|
}
|
| 1747 |
|
|
if(pos>offset+length) {
|
| 1748 |
|
|
read_unlock_bh(&addrconf_hash_lock);
|
| 1749 |
|
|
goto done;
|
| 1750 |
|
|
}
|
| 1751 |
|
|
}
|
| 1752 |
|
|
read_unlock_bh(&addrconf_hash_lock);
|
| 1753 |
|
|
}
|
| 1754 |
|
|
|
| 1755 |
|
|
done:
|
| 1756 |
|
|
|
| 1757 |
|
|
*start=buffer+(offset-begin);
|
| 1758 |
|
|
len-=(offset-begin);
|
| 1759 |
|
|
if(len>length)
|
| 1760 |
|
|
len=length;
|
| 1761 |
|
|
if(len<0)
|
| 1762 |
|
|
len=0;
|
| 1763 |
|
|
return len;
|
| 1764 |
|
|
}
|
| 1765 |
|
|
|
| 1766 |
|
|
#endif /* CONFIG_PROC_FS */
|
| 1767 |
|
|
|
| 1768 |
|
|
/*
|
| 1769 |
|
|
* Periodic address status verification
|
| 1770 |
|
|
*/
|
| 1771 |
|
|
|
| 1772 |
|
|
void addrconf_verify(unsigned long foo)
|
| 1773 |
|
|
{
|
| 1774 |
|
|
struct inet6_ifaddr *ifp;
|
| 1775 |
|
|
unsigned long now, next;
|
| 1776 |
|
|
int i;
|
| 1777 |
|
|
|
| 1778 |
|
|
spin_lock_bh(&addrconf_verify_lock);
|
| 1779 |
|
|
now = jiffies;
|
| 1780 |
|
|
next = now + ADDR_CHECK_FREQUENCY;
|
| 1781 |
|
|
|
| 1782 |
|
|
del_timer(&addr_chk_timer);
|
| 1783 |
|
|
|
| 1784 |
|
|
for (i=0; i < IN6_ADDR_HSIZE; i++) {
|
| 1785 |
|
|
|
| 1786 |
|
|
restart:
|
| 1787 |
|
|
write_lock(&addrconf_hash_lock);
|
| 1788 |
|
|
for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
|
| 1789 |
|
|
unsigned long age;
|
| 1790 |
|
|
|
| 1791 |
|
|
if (ifp->flags & IFA_F_PERMANENT)
|
| 1792 |
|
|
continue;
|
| 1793 |
|
|
|
| 1794 |
|
|
spin_lock(&ifp->lock);
|
| 1795 |
|
|
age = (now - ifp->tstamp) / HZ;
|
| 1796 |
|
|
|
| 1797 |
|
|
if (age >= ifp->valid_lft) {
|
| 1798 |
|
|
spin_unlock(&ifp->lock);
|
| 1799 |
|
|
in6_ifa_hold(ifp);
|
| 1800 |
|
|
write_unlock(&addrconf_hash_lock);
|
| 1801 |
|
|
ipv6_del_addr(ifp);
|
| 1802 |
|
|
goto restart;
|
| 1803 |
|
|
} else if (age >= ifp->prefered_lft) {
|
| 1804 |
|
|
/* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
|
| 1805 |
|
|
int deprecate = 0;
|
| 1806 |
|
|
|
| 1807 |
|
|
if (!(ifp->flags&IFA_F_DEPRECATED)) {
|
| 1808 |
|
|
deprecate = 1;
|
| 1809 |
|
|
ifp->flags |= IFA_F_DEPRECATED;
|
| 1810 |
|
|
}
|
| 1811 |
|
|
|
| 1812 |
|
|
if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
|
| 1813 |
|
|
next = ifp->tstamp + ifp->valid_lft * HZ;
|
| 1814 |
|
|
|
| 1815 |
|
|
spin_unlock(&ifp->lock);
|
| 1816 |
|
|
|
| 1817 |
|
|
if (deprecate) {
|
| 1818 |
|
|
in6_ifa_hold(ifp);
|
| 1819 |
|
|
write_unlock(&addrconf_hash_lock);
|
| 1820 |
|
|
|
| 1821 |
|
|
ipv6_ifa_notify(0, ifp);
|
| 1822 |
|
|
in6_ifa_put(ifp);
|
| 1823 |
|
|
goto restart;
|
| 1824 |
|
|
}
|
| 1825 |
|
|
} else {
|
| 1826 |
|
|
/* ifp->prefered_lft <= ifp->valid_lft */
|
| 1827 |
|
|
if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
|
| 1828 |
|
|
next = ifp->tstamp + ifp->prefered_lft * HZ;
|
| 1829 |
|
|
spin_unlock(&ifp->lock);
|
| 1830 |
|
|
}
|
| 1831 |
|
|
}
|
| 1832 |
|
|
write_unlock(&addrconf_hash_lock);
|
| 1833 |
|
|
}
|
| 1834 |
|
|
|
| 1835 |
|
|
addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
|
| 1836 |
|
|
add_timer(&addr_chk_timer);
|
| 1837 |
|
|
spin_unlock_bh(&addrconf_verify_lock);
|
| 1838 |
|
|
}
|
| 1839 |
|
|
|
| 1840 |
|
|
static int
|
| 1841 |
|
|
inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
| 1842 |
|
|
{
|
| 1843 |
|
|
struct rtattr **rta = arg;
|
| 1844 |
|
|
struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
|
| 1845 |
|
|
struct in6_addr *pfx;
|
| 1846 |
|
|
|
| 1847 |
|
|
pfx = NULL;
|
| 1848 |
|
|
if (rta[IFA_ADDRESS-1]) {
|
| 1849 |
|
|
if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
|
| 1850 |
|
|
return -EINVAL;
|
| 1851 |
|
|
pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
|
| 1852 |
|
|
}
|
| 1853 |
|
|
if (rta[IFA_LOCAL-1]) {
|
| 1854 |
|
|
if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
|
| 1855 |
|
|
return -EINVAL;
|
| 1856 |
|
|
pfx = RTA_DATA(rta[IFA_LOCAL-1]);
|
| 1857 |
|
|
}
|
| 1858 |
|
|
if (pfx == NULL)
|
| 1859 |
|
|
return -EINVAL;
|
| 1860 |
|
|
|
| 1861 |
|
|
return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
|
| 1862 |
|
|
}
|
| 1863 |
|
|
|
| 1864 |
|
|
static int
|
| 1865 |
|
|
inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
| 1866 |
|
|
{
|
| 1867 |
|
|
struct rtattr **rta = arg;
|
| 1868 |
|
|
struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
|
| 1869 |
|
|
struct in6_addr *pfx;
|
| 1870 |
|
|
|
| 1871 |
|
|
pfx = NULL;
|
| 1872 |
|
|
if (rta[IFA_ADDRESS-1]) {
|
| 1873 |
|
|
if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
|
| 1874 |
|
|
return -EINVAL;
|
| 1875 |
|
|
pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
|
| 1876 |
|
|
}
|
| 1877 |
|
|
if (rta[IFA_LOCAL-1]) {
|
| 1878 |
|
|
if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
|
| 1879 |
|
|
return -EINVAL;
|
| 1880 |
|
|
pfx = RTA_DATA(rta[IFA_LOCAL-1]);
|
| 1881 |
|
|
}
|
| 1882 |
|
|
if (pfx == NULL)
|
| 1883 |
|
|
return -EINVAL;
|
| 1884 |
|
|
|
| 1885 |
|
|
return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
|
| 1886 |
|
|
}
|
| 1887 |
|
|
|
| 1888 |
|
|
static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
|
| 1889 |
|
|
u32 pid, u32 seq, int event)
|
| 1890 |
|
|
{
|
| 1891 |
|
|
struct ifaddrmsg *ifm;
|
| 1892 |
|
|
struct nlmsghdr *nlh;
|
| 1893 |
|
|
struct ifa_cacheinfo ci;
|
| 1894 |
|
|
unsigned char *b = skb->tail;
|
| 1895 |
|
|
|
| 1896 |
|
|
nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
|
| 1897 |
|
|
if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
|
| 1898 |
|
|
ifm = NLMSG_DATA(nlh);
|
| 1899 |
|
|
ifm->ifa_family = AF_INET6;
|
| 1900 |
|
|
ifm->ifa_prefixlen = ifa->prefix_len;
|
| 1901 |
|
|
ifm->ifa_flags = ifa->flags;
|
| 1902 |
|
|
ifm->ifa_scope = RT_SCOPE_UNIVERSE;
|
| 1903 |
|
|
if (ifa->scope&IFA_HOST)
|
| 1904 |
|
|
ifm->ifa_scope = RT_SCOPE_HOST;
|
| 1905 |
|
|
else if (ifa->scope&IFA_LINK)
|
| 1906 |
|
|
ifm->ifa_scope = RT_SCOPE_LINK;
|
| 1907 |
|
|
else if (ifa->scope&IFA_SITE)
|
| 1908 |
|
|
ifm->ifa_scope = RT_SCOPE_SITE;
|
| 1909 |
|
|
ifm->ifa_index = ifa->idev->dev->ifindex;
|
| 1910 |
|
|
RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
|
| 1911 |
|
|
if (!(ifa->flags&IFA_F_PERMANENT)) {
|
| 1912 |
|
|
ci.ifa_prefered = ifa->prefered_lft;
|
| 1913 |
|
|
ci.ifa_valid = ifa->valid_lft;
|
| 1914 |
|
|
if (ci.ifa_prefered != 0xFFFFFFFF) {
|
| 1915 |
|
|
long tval = (jiffies - ifa->tstamp)/HZ;
|
| 1916 |
|
|
ci.ifa_prefered -= tval;
|
| 1917 |
|
|
if (ci.ifa_valid != 0xFFFFFFFF)
|
| 1918 |
|
|
ci.ifa_valid -= tval;
|
| 1919 |
|
|
}
|
| 1920 |
|
|
RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
|
| 1921 |
|
|
}
|
| 1922 |
|
|
nlh->nlmsg_len = skb->tail - b;
|
| 1923 |
|
|
return skb->len;
|
| 1924 |
|
|
|
| 1925 |
|
|
nlmsg_failure:
|
| 1926 |
|
|
rtattr_failure:
|
| 1927 |
|
|
skb_trim(skb, b - skb->data);
|
| 1928 |
|
|
return -1;
|
| 1929 |
|
|
}
|
| 1930 |
|
|
|
| 1931 |
|
|
static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
|
| 1932 |
|
|
{
|
| 1933 |
|
|
int idx, ip_idx;
|
| 1934 |
|
|
int s_idx, s_ip_idx;
|
| 1935 |
|
|
struct inet6_ifaddr *ifa;
|
| 1936 |
|
|
|
| 1937 |
|
|
s_idx = cb->args[0];
|
| 1938 |
|
|
s_ip_idx = ip_idx = cb->args[1];
|
| 1939 |
|
|
|
| 1940 |
|
|
for (idx=0; idx < IN6_ADDR_HSIZE; idx++) {
|
| 1941 |
|
|
if (idx < s_idx)
|
| 1942 |
|
|
continue;
|
| 1943 |
|
|
if (idx > s_idx)
|
| 1944 |
|
|
s_ip_idx = 0;
|
| 1945 |
|
|
read_lock_bh(&addrconf_hash_lock);
|
| 1946 |
|
|
for (ifa=inet6_addr_lst[idx], ip_idx = 0; ifa;
|
| 1947 |
|
|
ifa = ifa->lst_next, ip_idx++) {
|
| 1948 |
|
|
if (ip_idx < s_ip_idx)
|
| 1949 |
|
|
continue;
|
| 1950 |
|
|
if (inet6_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
|
| 1951 |
|
|
cb->nlh->nlmsg_seq, RTM_NEWADDR) <= 0) {
|
| 1952 |
|
|
read_unlock_bh(&addrconf_hash_lock);
|
| 1953 |
|
|
goto done;
|
| 1954 |
|
|
}
|
| 1955 |
|
|
}
|
| 1956 |
|
|
read_unlock_bh(&addrconf_hash_lock);
|
| 1957 |
|
|
}
|
| 1958 |
|
|
done:
|
| 1959 |
|
|
cb->args[0] = idx;
|
| 1960 |
|
|
cb->args[1] = ip_idx;
|
| 1961 |
|
|
|
| 1962 |
|
|
return skb->len;
|
| 1963 |
|
|
}
|
| 1964 |
|
|
|
| 1965 |
|
|
static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
|
| 1966 |
|
|
{
|
| 1967 |
|
|
struct sk_buff *skb;
|
| 1968 |
|
|
int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
|
| 1969 |
|
|
|
| 1970 |
|
|
skb = alloc_skb(size, GFP_ATOMIC);
|
| 1971 |
|
|
if (!skb) {
|
| 1972 |
|
|
netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, ENOBUFS);
|
| 1973 |
|
|
return;
|
| 1974 |
|
|
}
|
| 1975 |
|
|
if (inet6_fill_ifaddr(skb, ifa, 0, 0, event) < 0) {
|
| 1976 |
|
|
kfree_skb(skb);
|
| 1977 |
|
|
netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, EINVAL);
|
| 1978 |
|
|
return;
|
| 1979 |
|
|
}
|
| 1980 |
|
|
NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFADDR;
|
| 1981 |
|
|
netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFADDR, GFP_ATOMIC);
|
| 1982 |
|
|
}
|
| 1983 |
|
|
|
| 1984 |
|
|
static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
|
| 1985 |
|
|
__s32 *array, int bytes)
|
| 1986 |
|
|
{
|
| 1987 |
|
|
memset(array, 0, bytes);
|
| 1988 |
|
|
array[DEVCONF_FORWARDING] = cnf->forwarding;
|
| 1989 |
|
|
array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
|
| 1990 |
|
|
array[DEVCONF_MTU6] = cnf->mtu6;
|
| 1991 |
|
|
array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
|
| 1992 |
|
|
array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
|
| 1993 |
|
|
array[DEVCONF_AUTOCONF] = cnf->autoconf;
|
| 1994 |
|
|
array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
|
| 1995 |
|
|
array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
|
| 1996 |
|
|
array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
|
| 1997 |
|
|
array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
|
| 1998 |
|
|
#ifdef CONFIG_IPV6_PRIVACY
|
| 1999 |
|
|
array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
|
| 2000 |
|
|
array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
|
| 2001 |
|
|
array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
|
| 2002 |
|
|
array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
|
| 2003 |
|
|
array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
|
| 2004 |
|
|
#endif
|
| 2005 |
|
|
}
|
| 2006 |
|
|
|
| 2007 |
|
|
static int inet6_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
|
| 2008 |
|
|
struct inet6_dev *idev,
|
| 2009 |
|
|
int type, u32 pid, u32 seq)
|
| 2010 |
|
|
{
|
| 2011 |
|
|
__s32 *array = NULL;
|
| 2012 |
|
|
struct ifinfomsg *r;
|
| 2013 |
|
|
struct nlmsghdr *nlh;
|
| 2014 |
|
|
unsigned char *b = skb->tail;
|
| 2015 |
|
|
struct rtattr *subattr;
|
| 2016 |
|
|
|
| 2017 |
|
|
nlh = NLMSG_PUT(skb, pid, seq, type, sizeof(*r));
|
| 2018 |
|
|
if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
|
| 2019 |
|
|
r = NLMSG_DATA(nlh);
|
| 2020 |
|
|
r->ifi_family = AF_INET6;
|
| 2021 |
|
|
r->ifi_type = dev->type;
|
| 2022 |
|
|
r->ifi_index = dev->ifindex;
|
| 2023 |
|
|
r->ifi_flags = dev->flags;
|
| 2024 |
|
|
r->ifi_change = 0;
|
| 2025 |
|
|
if (!netif_running(dev) || !netif_carrier_ok(dev))
|
| 2026 |
|
|
r->ifi_flags &= ~IFF_RUNNING;
|
| 2027 |
|
|
else
|
| 2028 |
|
|
r->ifi_flags |= IFF_RUNNING;
|
| 2029 |
|
|
|
| 2030 |
|
|
RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
|
| 2031 |
|
|
|
| 2032 |
|
|
subattr = (struct rtattr*)skb->tail;
|
| 2033 |
|
|
|
| 2034 |
|
|
RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
|
| 2035 |
|
|
|
| 2036 |
|
|
/* return the device flags */
|
| 2037 |
|
|
RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
|
| 2038 |
|
|
|
| 2039 |
|
|
/* return the device sysctl params */
|
| 2040 |
|
|
if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
|
| 2041 |
|
|
goto rtattr_failure;
|
| 2042 |
|
|
ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
|
| 2043 |
|
|
RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
|
| 2044 |
|
|
|
| 2045 |
|
|
/* XXX - Statistics/MC not implemented */
|
| 2046 |
|
|
subattr->rta_len = skb->tail - (u8*)subattr;
|
| 2047 |
|
|
|
| 2048 |
|
|
nlh->nlmsg_len = skb->tail - b;
|
| 2049 |
|
|
kfree(array);
|
| 2050 |
|
|
return skb->len;
|
| 2051 |
|
|
|
| 2052 |
|
|
nlmsg_failure:
|
| 2053 |
|
|
rtattr_failure:
|
| 2054 |
|
|
if (array)
|
| 2055 |
|
|
kfree(array);
|
| 2056 |
|
|
skb_trim(skb, b - skb->data);
|
| 2057 |
|
|
return -1;
|
| 2058 |
|
|
}
|
| 2059 |
|
|
|
| 2060 |
|
|
static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
|
| 2061 |
|
|
{
|
| 2062 |
|
|
int idx, err;
|
| 2063 |
|
|
int s_idx = cb->args[0];
|
| 2064 |
|
|
struct net_device *dev;
|
| 2065 |
|
|
struct inet6_dev *idev;
|
| 2066 |
|
|
|
| 2067 |
|
|
read_lock(&dev_base_lock);
|
| 2068 |
|
|
for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
|
| 2069 |
|
|
if (idx < s_idx)
|
| 2070 |
|
|
continue;
|
| 2071 |
|
|
if ((idev = in6_dev_get(dev)) == NULL)
|
| 2072 |
|
|
continue;
|
| 2073 |
|
|
err = inet6_fill_ifinfo(skb, dev, idev, RTM_NEWLINK,
|
| 2074 |
|
|
NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq);
|
| 2075 |
|
|
in6_dev_put(idev);
|
| 2076 |
|
|
if (err <= 0)
|
| 2077 |
|
|
break;
|
| 2078 |
|
|
}
|
| 2079 |
|
|
read_unlock(&dev_base_lock);
|
| 2080 |
|
|
cb->args[0] = idx;
|
| 2081 |
|
|
|
| 2082 |
|
|
return skb->len;
|
| 2083 |
|
|
}
|
| 2084 |
|
|
|
| 2085 |
|
|
static struct rtnetlink_link inet6_rtnetlink_table[RTM_MAX-RTM_BASE+1] =
|
| 2086 |
|
|
{
|
| 2087 |
|
|
{ NULL, NULL, },
|
| 2088 |
|
|
{ NULL, NULL, },
|
| 2089 |
|
|
{ NULL, inet6_dump_ifinfo, },
|
| 2090 |
|
|
{ NULL, NULL, },
|
| 2091 |
|
|
|
| 2092 |
|
|
{ inet6_rtm_newaddr, NULL, },
|
| 2093 |
|
|
{ inet6_rtm_deladdr, NULL, },
|
| 2094 |
|
|
{ NULL, inet6_dump_ifaddr, },
|
| 2095 |
|
|
{ NULL, NULL, },
|
| 2096 |
|
|
|
| 2097 |
|
|
{ inet6_rtm_newroute, NULL, },
|
| 2098 |
|
|
{ inet6_rtm_delroute, NULL, },
|
| 2099 |
|
|
{ inet6_rtm_getroute, inet6_dump_fib, },
|
| 2100 |
|
|
{ NULL, NULL, },
|
| 2101 |
|
|
};
|
| 2102 |
|
|
|
| 2103 |
|
|
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
|
| 2104 |
|
|
{
|
| 2105 |
|
|
inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
|
| 2106 |
|
|
|
| 2107 |
|
|
switch (event) {
|
| 2108 |
|
|
case RTM_NEWADDR:
|
| 2109 |
|
|
ip6_rt_addr_add(&ifp->addr, ifp->idev->dev);
|
| 2110 |
|
|
break;
|
| 2111 |
|
|
case RTM_DELADDR:
|
| 2112 |
|
|
addrconf_leave_solict(ifp->idev->dev, &ifp->addr);
|
| 2113 |
|
|
if (ifp->idev->cnf.forwarding) {
|
| 2114 |
|
|
struct in6_addr addr;
|
| 2115 |
|
|
|
| 2116 |
|
|
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
|
| 2117 |
|
|
if (!ipv6_addr_any(&addr))
|
| 2118 |
|
|
ipv6_dev_ac_dec(ifp->idev->dev, &addr);
|
| 2119 |
|
|
}
|
| 2120 |
|
|
if (!ipv6_chk_addr(&ifp->addr, NULL))
|
| 2121 |
|
|
ip6_rt_addr_del(&ifp->addr, ifp->idev->dev);
|
| 2122 |
|
|
break;
|
| 2123 |
|
|
}
|
| 2124 |
|
|
}
|
| 2125 |
|
|
|
| 2126 |
|
|
#ifdef CONFIG_SYSCTL
|
| 2127 |
|
|
|
| 2128 |
|
|
static
|
| 2129 |
|
|
int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
|
| 2130 |
|
|
void *buffer, size_t *lenp)
|
| 2131 |
|
|
{
|
| 2132 |
|
|
int *valp = ctl->data;
|
| 2133 |
|
|
int val = *valp;
|
| 2134 |
|
|
int ret;
|
| 2135 |
|
|
|
| 2136 |
|
|
ret = proc_dointvec(ctl, write, filp, buffer, lenp);
|
| 2137 |
|
|
|
| 2138 |
|
|
if (write && *valp != val && valp != &ipv6_devconf_dflt.forwarding) {
|
| 2139 |
|
|
struct inet6_dev *idev = NULL;
|
| 2140 |
|
|
|
| 2141 |
|
|
if (valp != &ipv6_devconf.forwarding) {
|
| 2142 |
|
|
idev = (struct inet6_dev *)ctl->extra1;
|
| 2143 |
|
|
if (idev == NULL)
|
| 2144 |
|
|
return ret;
|
| 2145 |
|
|
} else
|
| 2146 |
|
|
ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
|
| 2147 |
|
|
|
| 2148 |
|
|
addrconf_forward_change(idev);
|
| 2149 |
|
|
|
| 2150 |
|
|
if (*valp)
|
| 2151 |
|
|
rt6_purge_dflt_routers(0);
|
| 2152 |
|
|
}
|
| 2153 |
|
|
|
| 2154 |
|
|
return ret;
|
| 2155 |
|
|
}
|
| 2156 |
|
|
|
| 2157 |
|
|
static struct addrconf_sysctl_table
|
| 2158 |
|
|
{
|
| 2159 |
|
|
struct ctl_table_header *sysctl_header;
|
| 2160 |
|
|
ctl_table addrconf_vars[11];
|
| 2161 |
|
|
ctl_table addrconf_dev[2];
|
| 2162 |
|
|
ctl_table addrconf_conf_dir[2];
|
| 2163 |
|
|
ctl_table addrconf_proto_dir[2];
|
| 2164 |
|
|
ctl_table addrconf_root_dir[2];
|
| 2165 |
|
|
} addrconf_sysctl = {
|
| 2166 |
|
|
NULL,
|
| 2167 |
|
|
{{NET_IPV6_FORWARDING, "forwarding",
|
| 2168 |
|
|
&ipv6_devconf.forwarding, sizeof(int), 0644, NULL,
|
| 2169 |
|
|
&addrconf_sysctl_forward},
|
| 2170 |
|
|
|
| 2171 |
|
|
{NET_IPV6_HOP_LIMIT, "hop_limit",
|
| 2172 |
|
|
&ipv6_devconf.hop_limit, sizeof(int), 0644, NULL,
|
| 2173 |
|
|
&proc_dointvec},
|
| 2174 |
|
|
|
| 2175 |
|
|
{NET_IPV6_MTU, "mtu",
|
| 2176 |
|
|
&ipv6_devconf.mtu6, sizeof(int), 0644, NULL,
|
| 2177 |
|
|
&proc_dointvec},
|
| 2178 |
|
|
|
| 2179 |
|
|
{NET_IPV6_ACCEPT_RA, "accept_ra",
|
| 2180 |
|
|
&ipv6_devconf.accept_ra, sizeof(int), 0644, NULL,
|
| 2181 |
|
|
&proc_dointvec},
|
| 2182 |
|
|
|
| 2183 |
|
|
{NET_IPV6_ACCEPT_REDIRECTS, "accept_redirects",
|
| 2184 |
|
|
&ipv6_devconf.accept_redirects, sizeof(int), 0644, NULL,
|
| 2185 |
|
|
&proc_dointvec},
|
| 2186 |
|
|
|
| 2187 |
|
|
{NET_IPV6_AUTOCONF, "autoconf",
|
| 2188 |
|
|
&ipv6_devconf.autoconf, sizeof(int), 0644, NULL,
|
| 2189 |
|
|
&proc_dointvec},
|
| 2190 |
|
|
|
| 2191 |
|
|
{NET_IPV6_DAD_TRANSMITS, "dad_transmits",
|
| 2192 |
|
|
&ipv6_devconf.dad_transmits, sizeof(int), 0644, NULL,
|
| 2193 |
|
|
&proc_dointvec},
|
| 2194 |
|
|
|
| 2195 |
|
|
{NET_IPV6_RTR_SOLICITS, "router_solicitations",
|
| 2196 |
|
|
&ipv6_devconf.rtr_solicits, sizeof(int), 0644, NULL,
|
| 2197 |
|
|
&proc_dointvec},
|
| 2198 |
|
|
|
| 2199 |
|
|
{NET_IPV6_RTR_SOLICIT_INTERVAL, "router_solicitation_interval",
|
| 2200 |
|
|
&ipv6_devconf.rtr_solicit_interval, sizeof(int), 0644, NULL,
|
| 2201 |
|
|
&proc_dointvec_jiffies},
|
| 2202 |
|
|
|
| 2203 |
|
|
{NET_IPV6_RTR_SOLICIT_DELAY, "router_solicitation_delay",
|
| 2204 |
|
|
&ipv6_devconf.rtr_solicit_delay, sizeof(int), 0644, NULL,
|
| 2205 |
|
|
&proc_dointvec_jiffies},
|
| 2206 |
|
|
|
| 2207 |
|
|
{0}},
|
| 2208 |
|
|
|
| 2209 |
|
|
{{NET_PROTO_CONF_ALL, "all", NULL, 0, 0555, addrconf_sysctl.addrconf_vars},{0}},
|
| 2210 |
|
|
{{NET_IPV6_CONF, "conf", NULL, 0, 0555, addrconf_sysctl.addrconf_dev},{0}},
|
| 2211 |
|
|
{{NET_IPV6, "ipv6", NULL, 0, 0555, addrconf_sysctl.addrconf_conf_dir},{0}},
|
| 2212 |
|
|
{{CTL_NET, "net", NULL, 0, 0555, addrconf_sysctl.addrconf_proto_dir},{0}}
|
| 2213 |
|
|
};
|
| 2214 |
|
|
|
| 2215 |
|
|
static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
|
| 2216 |
|
|
{
|
| 2217 |
|
|
int i;
|
| 2218 |
|
|
struct net_device *dev = idev ? idev->dev : NULL;
|
| 2219 |
|
|
struct addrconf_sysctl_table *t;
|
| 2220 |
|
|
|
| 2221 |
|
|
t = kmalloc(sizeof(*t), GFP_KERNEL);
|
| 2222 |
|
|
if (t == NULL)
|
| 2223 |
|
|
return;
|
| 2224 |
|
|
memcpy(t, &addrconf_sysctl, sizeof(*t));
|
| 2225 |
|
|
for (i=0; i<sizeof(t->addrconf_vars)/sizeof(t->addrconf_vars[0])-1; i++) {
|
| 2226 |
|
|
t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
|
| 2227 |
|
|
t->addrconf_vars[i].de = NULL;
|
| 2228 |
|
|
t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
|
| 2229 |
|
|
}
|
| 2230 |
|
|
if (dev) {
|
| 2231 |
|
|
t->addrconf_dev[0].procname = dev->name;
|
| 2232 |
|
|
t->addrconf_dev[0].ctl_name = dev->ifindex;
|
| 2233 |
|
|
} else {
|
| 2234 |
|
|
t->addrconf_dev[0].procname = "default";
|
| 2235 |
|
|
t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
|
| 2236 |
|
|
}
|
| 2237 |
|
|
t->addrconf_dev[0].child = t->addrconf_vars;
|
| 2238 |
|
|
t->addrconf_dev[0].de = NULL;
|
| 2239 |
|
|
t->addrconf_conf_dir[0].child = t->addrconf_dev;
|
| 2240 |
|
|
t->addrconf_conf_dir[0].de = NULL;
|
| 2241 |
|
|
t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
|
| 2242 |
|
|
t->addrconf_proto_dir[0].de = NULL;
|
| 2243 |
|
|
t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
|
| 2244 |
|
|
t->addrconf_root_dir[0].de = NULL;
|
| 2245 |
|
|
|
| 2246 |
|
|
t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
|
| 2247 |
|
|
if (t->sysctl_header == NULL)
|
| 2248 |
|
|
kfree(t);
|
| 2249 |
|
|
else
|
| 2250 |
|
|
p->sysctl = t;
|
| 2251 |
|
|
}
|
| 2252 |
|
|
|
| 2253 |
|
|
static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
|
| 2254 |
|
|
{
|
| 2255 |
|
|
if (p->sysctl) {
|
| 2256 |
|
|
struct addrconf_sysctl_table *t = p->sysctl;
|
| 2257 |
|
|
p->sysctl = NULL;
|
| 2258 |
|
|
unregister_sysctl_table(t->sysctl_header);
|
| 2259 |
|
|
kfree(t);
|
| 2260 |
|
|
}
|
| 2261 |
|
|
}
|
| 2262 |
|
|
|
| 2263 |
|
|
|
| 2264 |
|
|
#endif
|
| 2265 |
|
|
|
| 2266 |
|
|
/*
|
| 2267 |
|
|
* Device notifier
|
| 2268 |
|
|
*/
|
| 2269 |
|
|
|
| 2270 |
|
|
int register_inet6addr_notifier(struct notifier_block *nb)
|
| 2271 |
|
|
{
|
| 2272 |
|
|
return notifier_chain_register(&inet6addr_chain, nb);
|
| 2273 |
|
|
}
|
| 2274 |
|
|
|
| 2275 |
|
|
int unregister_inet6addr_notifier(struct notifier_block *nb)
|
| 2276 |
|
|
{
|
| 2277 |
|
|
return notifier_chain_unregister(&inet6addr_chain,nb);
|
| 2278 |
|
|
}
|
| 2279 |
|
|
|
| 2280 |
|
|
/*
|
| 2281 |
|
|
* Init / cleanup code
|
| 2282 |
|
|
*/
|
| 2283 |
|
|
|
| 2284 |
|
|
void __init addrconf_init(void)
|
| 2285 |
|
|
{
|
| 2286 |
|
|
#ifdef MODULE
|
| 2287 |
|
|
struct net_device *dev;
|
| 2288 |
|
|
|
| 2289 |
|
|
/* This takes sense only during module load. */
|
| 2290 |
|
|
rtnl_lock();
|
| 2291 |
|
|
for (dev = dev_base; dev; dev = dev->next) {
|
| 2292 |
|
|
if (!(dev->flags&IFF_UP))
|
| 2293 |
|
|
continue;
|
| 2294 |
|
|
|
| 2295 |
|
|
switch (dev->type) {
|
| 2296 |
|
|
case ARPHRD_LOOPBACK:
|
| 2297 |
|
|
init_loopback(dev);
|
| 2298 |
|
|
break;
|
| 2299 |
|
|
case ARPHRD_ETHER:
|
| 2300 |
|
|
case ARPHRD_FDDI:
|
| 2301 |
|
|
case ARPHRD_IEEE802_TR:
|
| 2302 |
|
|
case ARPHRD_ARCNET:
|
| 2303 |
|
|
addrconf_dev_config(dev);
|
| 2304 |
|
|
break;
|
| 2305 |
|
|
default:;
|
| 2306 |
|
|
/* Ignore all other */
|
| 2307 |
|
|
}
|
| 2308 |
|
|
}
|
| 2309 |
|
|
rtnl_unlock();
|
| 2310 |
|
|
#endif
|
| 2311 |
|
|
|
| 2312 |
|
|
#ifdef CONFIG_PROC_FS
|
| 2313 |
|
|
proc_net_create("if_inet6", 0, iface_proc_info);
|
| 2314 |
|
|
#endif
|
| 2315 |
|
|
|
| 2316 |
|
|
addrconf_verify(0);
|
| 2317 |
|
|
rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
|
| 2318 |
|
|
#ifdef CONFIG_SYSCTL
|
| 2319 |
|
|
addrconf_sysctl.sysctl_header =
|
| 2320 |
|
|
register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
|
| 2321 |
|
|
addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
|
| 2322 |
|
|
#endif
|
| 2323 |
|
|
}
|
| 2324 |
|
|
|
| 2325 |
|
|
#ifdef MODULE
|
| 2326 |
|
|
void addrconf_cleanup(void)
|
| 2327 |
|
|
{
|
| 2328 |
|
|
struct net_device *dev;
|
| 2329 |
|
|
struct inet6_dev *idev;
|
| 2330 |
|
|
struct inet6_ifaddr *ifa;
|
| 2331 |
|
|
int i;
|
| 2332 |
|
|
|
| 2333 |
|
|
rtnetlink_links[PF_INET6] = NULL;
|
| 2334 |
|
|
#ifdef CONFIG_SYSCTL
|
| 2335 |
|
|
addrconf_sysctl_unregister(&ipv6_devconf_dflt);
|
| 2336 |
|
|
addrconf_sysctl_unregister(&ipv6_devconf);
|
| 2337 |
|
|
#endif
|
| 2338 |
|
|
|
| 2339 |
|
|
rtnl_lock();
|
| 2340 |
|
|
|
| 2341 |
|
|
/*
|
| 2342 |
|
|
* clean dev list.
|
| 2343 |
|
|
*/
|
| 2344 |
|
|
|
| 2345 |
|
|
for (dev=dev_base; dev; dev=dev->next) {
|
| 2346 |
|
|
if ((idev = __in6_dev_get(dev)) == NULL)
|
| 2347 |
|
|
continue;
|
| 2348 |
|
|
addrconf_ifdown(dev, 1);
|
| 2349 |
|
|
}
|
| 2350 |
|
|
|
| 2351 |
|
|
/*
|
| 2352 |
|
|
* Check hash table.
|
| 2353 |
|
|
*/
|
| 2354 |
|
|
|
| 2355 |
|
|
write_lock_bh(&addrconf_hash_lock);
|
| 2356 |
|
|
for (i=0; i < IN6_ADDR_HSIZE; i++) {
|
| 2357 |
|
|
for (ifa=inet6_addr_lst[i]; ifa; ) {
|
| 2358 |
|
|
struct inet6_ifaddr *bifa;
|
| 2359 |
|
|
|
| 2360 |
|
|
bifa = ifa;
|
| 2361 |
|
|
ifa = ifa->lst_next;
|
| 2362 |
|
|
printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
|
| 2363 |
|
|
/* Do not free it; something is wrong.
|
| 2364 |
|
|
Now we can investigate it with debugger.
|
| 2365 |
|
|
*/
|
| 2366 |
|
|
}
|
| 2367 |
|
|
}
|
| 2368 |
|
|
write_unlock_bh(&addrconf_hash_lock);
|
| 2369 |
|
|
|
| 2370 |
|
|
del_timer(&addr_chk_timer);
|
| 2371 |
|
|
|
| 2372 |
|
|
rtnl_unlock();
|
| 2373 |
|
|
|
| 2374 |
|
|
#ifdef CONFIG_PROC_FS
|
| 2375 |
|
|
proc_net_remove("if_inet6");
|
| 2376 |
|
|
#endif
|
| 2377 |
|
|
}
|
| 2378 |
|
|
#endif /* MODULE */
|
