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net/ipv6/addrconf.c
115 KB
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/* * IPv6 Address [auto]configuration * Linux INET6 implementation * * 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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* This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ /* * Changes: * * Janos Farkas : delete timer on ifdown * <chexum@bankinf.banki.hu> * Andi Kleen : kill double kfree on module * unload. * Maciej W. Rozycki : FDDI support * sekiya@USAGI : Don't send too many RS * packets. * yoshfuji@USAGI : Fixed interval between DAD * packets. * YOSHIFUJI Hideaki @USAGI : improved accuracy of * address validation timer. * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) * support. * Yuji SEKIYA @USAGI : Don't assign a same IPv6 * address on a same interface. * YOSHIFUJI Hideaki @USAGI : ARCnet support * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to * seq_file. |
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* YOSHIFUJI Hideaki @USAGI : improved source address * selection; consider scope, * status etc. |
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*/ |
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#include <linux/errno.h> #include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/socket.h> #include <linux/sockios.h> |
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#include <linux/net.h> #include <linux/in6.h> #include <linux/netdevice.h> |
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#include <linux/if_addr.h> |
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#include <linux/if_arp.h> #include <linux/if_arcnet.h> #include <linux/if_infiniband.h> #include <linux/route.h> #include <linux/inetdevice.h> #include <linux/init.h> |
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#include <linux/slab.h> |
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#ifdef CONFIG_SYSCTL #include <linux/sysctl.h> #endif |
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#include <linux/capability.h> |
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#include <linux/delay.h> #include <linux/notifier.h> |
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#include <linux/string.h> |
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|
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#include <net/net_namespace.h> |
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#include <net/sock.h> #include <net/snmp.h> #include <net/ipv6.h> #include <net/protocol.h> #include <net/ndisc.h> #include <net/ip6_route.h> #include <net/addrconf.h> #include <net/tcp.h> #include <net/ip.h> |
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#include <net/netlink.h> |
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#include <net/pkt_sched.h> |
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#include <linux/if_tunnel.h> #include <linux/rtnetlink.h> #ifdef CONFIG_IPV6_PRIVACY #include <linux/random.h> |
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#endif |
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#include <linux/uaccess.h> |
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#include <asm/unaligned.h> |
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#include <linux/proc_fs.h> #include <linux/seq_file.h> |
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#include <linux/export.h> |
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/* Set to 3 to get tracing... */ #define ACONF_DEBUG 2 #if ACONF_DEBUG >= 3 #define ADBG(x) printk x #else #define ADBG(x) #endif #define INFINITY_LIFE_TIME 0xFFFFFFFF |
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static inline u32 cstamp_delta(unsigned long cstamp) { return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; } |
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#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1) #define ADDRCONF_TIMER_FUZZ (HZ / 4) #define ADDRCONF_TIMER_FUZZ_MAX (HZ) |
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#ifdef CONFIG_SYSCTL |
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static void addrconf_sysctl_register(struct inet6_dev *idev); |
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static void addrconf_sysctl_unregister(struct inet6_dev *idev); #else static inline void addrconf_sysctl_register(struct inet6_dev *idev) { } static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) { } |
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#endif #ifdef CONFIG_IPV6_PRIVACY static int __ipv6_regen_rndid(struct inet6_dev *idev); |
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static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
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static void ipv6_regen_rndid(unsigned long data); |
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#endif |
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static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
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static int ipv6_count_addresses(struct inet6_dev *idev); /* * Configured unicast address hash table */ |
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static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
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static DEFINE_SPINLOCK(addrconf_hash_lock); |
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static void addrconf_verify(unsigned long); |
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static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
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static DEFINE_SPINLOCK(addrconf_verify_lock); static void addrconf_join_anycast(struct inet6_ifaddr *ifp); static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
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static void addrconf_type_change(struct net_device *dev, unsigned long event); |
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static int addrconf_ifdown(struct net_device *dev, int how); |
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static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
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static void addrconf_dad_timer(unsigned long data); static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
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static void addrconf_dad_run(struct inet6_dev *idev); |
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static void addrconf_rs_timer(unsigned long data); static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
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static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
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struct prefix_info *pinfo); |
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static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, struct net_device *dev); |
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static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
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static struct ipv6_devconf ipv6_devconf __read_mostly = { |
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.forwarding = 0, .hop_limit = IPV6_DEFAULT_HOPLIMIT, .mtu6 = IPV6_MIN_MTU, .accept_ra = 1, .accept_redirects = 1, .autoconf = 1, .force_mld_version = 0, .dad_transmits = 1, .rtr_solicits = MAX_RTR_SOLICITATIONS, .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, #ifdef CONFIG_IPV6_PRIVACY .use_tempaddr = 0, .temp_valid_lft = TEMP_VALID_LIFETIME, .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, .regen_max_retry = REGEN_MAX_RETRY, .max_desync_factor = MAX_DESYNC_FACTOR, #endif .max_addresses = IPV6_MAX_ADDRESSES, |
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.accept_ra_defrtr = 1, |
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.accept_ra_pinfo = 1, |
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#ifdef CONFIG_IPV6_ROUTER_PREF .accept_ra_rtr_pref = 1, |
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.rtr_probe_interval = 60 * HZ, |
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#ifdef CONFIG_IPV6_ROUTE_INFO .accept_ra_rt_info_max_plen = 0, #endif |
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#endif |
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.proxy_ndp = 0, |
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.accept_source_route = 0, /* we do not accept RH0 by default. */ |
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.disable_ipv6 = 0, |
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.accept_dad = 1, |
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}; |
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static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
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.forwarding = 0, .hop_limit = IPV6_DEFAULT_HOPLIMIT, .mtu6 = IPV6_MIN_MTU, .accept_ra = 1, .accept_redirects = 1, .autoconf = 1, .dad_transmits = 1, .rtr_solicits = MAX_RTR_SOLICITATIONS, .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, #ifdef CONFIG_IPV6_PRIVACY .use_tempaddr = 0, .temp_valid_lft = TEMP_VALID_LIFETIME, .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, .regen_max_retry = REGEN_MAX_RETRY, .max_desync_factor = MAX_DESYNC_FACTOR, #endif .max_addresses = IPV6_MAX_ADDRESSES, |
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.accept_ra_defrtr = 1, |
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.accept_ra_pinfo = 1, |
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#ifdef CONFIG_IPV6_ROUTER_PREF .accept_ra_rtr_pref = 1, |
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.rtr_probe_interval = 60 * HZ, |
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#ifdef CONFIG_IPV6_ROUTE_INFO .accept_ra_rt_info_max_plen = 0, #endif |
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#endif |
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.proxy_ndp = 0, |
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.accept_source_route = 0, /* we do not accept RH0 by default. */ |
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.disable_ipv6 = 0, |
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.accept_dad = 1, |
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}; /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ |
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const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
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const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
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const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; |
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/* Check if a valid qdisc is available */ |
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static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
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{ |
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return !qdisc_tx_is_noop(dev); |
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} |
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/* Check if a route is valid prefix route */ static inline int addrconf_is_prefix_route(const struct rt6_info *rt) { |
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return (rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0; |
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} |
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static void addrconf_del_timer(struct inet6_ifaddr *ifp) { if (del_timer(&ifp->timer)) __in6_ifa_put(ifp); } |
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enum addrconf_timer_t { |
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AC_NONE, AC_DAD, AC_RS, }; static void addrconf_mod_timer(struct inet6_ifaddr *ifp, enum addrconf_timer_t what, unsigned long when) { if (!del_timer(&ifp->timer)) in6_ifa_hold(ifp); switch (what) { case AC_DAD: ifp->timer.function = addrconf_dad_timer; break; case AC_RS: ifp->timer.function = addrconf_rs_timer; break; |
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default: break; |
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} ifp->timer.expires = jiffies + when; add_timer(&ifp->timer); } |
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static int snmp6_alloc_dev(struct inet6_dev *idev) { |
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if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
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sizeof(struct ipstats_mib), __alignof__(struct ipstats_mib)) < 0) |
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goto err_ip; |
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idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), GFP_KERNEL); if (!idev->stats.icmpv6dev) |
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goto err_icmp; |
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idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), GFP_KERNEL); if (!idev->stats.icmpv6msgdev) |
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goto err_icmpmsg; |
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return 0; |
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err_icmpmsg: |
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kfree(idev->stats.icmpv6dev); |
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err_icmp: |
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snmp_mib_free((void __percpu **)idev->stats.ipv6); |
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err_ip: |
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return -ENOMEM; |
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} |
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static void snmp6_free_dev(struct inet6_dev *idev) |
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{ |
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kfree(idev->stats.icmpv6msgdev); kfree(idev->stats.icmpv6dev); |
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snmp_mib_free((void __percpu **)idev->stats.ipv6); |
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} |
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/* Nobody refers to this device, we may destroy it. */ void in6_dev_finish_destroy(struct inet6_dev *idev) { struct net_device *dev = idev->dev; |
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WARN_ON(!list_empty(&idev->addr_list)); |
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WARN_ON(idev->mc_list != NULL); |
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#ifdef NET_REFCNT_DEBUG printk(KERN_DEBUG "in6_dev_finish_destroy: %s ", dev ? dev->name : "NIL"); #endif dev_put(dev); if (!idev->dead) { |
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pr_warning("Freeing alive inet6 device %p ", idev); |
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return; } snmp6_free_dev(idev); |
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kfree_rcu(idev, rcu); |
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} |
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EXPORT_SYMBOL(in6_dev_finish_destroy); |
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static struct inet6_dev * ipv6_add_dev(struct net_device *dev) { struct inet6_dev *ndev; ASSERT_RTNL(); if (dev->mtu < IPV6_MIN_MTU) return NULL; |
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ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
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if (ndev == NULL) return NULL; |
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rwlock_init(&ndev->lock); ndev->dev = dev; |
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INIT_LIST_HEAD(&ndev->addr_list); |
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memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
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ndev->cnf.mtu6 = dev->mtu; ndev->cnf.sysctl = NULL; ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); if (ndev->nd_parms == NULL) { kfree(ndev); return NULL; } |
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if (ndev->cnf.forwarding) dev_disable_lro(dev); |
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/* We refer to the device */ dev_hold(dev); |
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if (snmp6_alloc_dev(ndev) < 0) { ADBG((KERN_WARNING "%s(): cannot allocate memory for statistics; dev=%s. ", |
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__func__, dev->name)); |
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neigh_parms_release(&nd_tbl, ndev->nd_parms); |
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dev_put(dev); kfree(ndev); |
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return NULL; } |
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if (snmp6_register_dev(ndev) < 0) { ADBG((KERN_WARNING "%s(): cannot create /proc/net/dev_snmp6/%s ", |
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__func__, dev->name)); |
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neigh_parms_release(&nd_tbl, ndev->nd_parms); ndev->dead = 1; in6_dev_finish_destroy(ndev); return NULL; } /* One reference from device. We must do this before * we invoke __ipv6_regen_rndid(). */ in6_dev_hold(ndev); |
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if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) ndev->cnf.accept_dad = -1; |
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#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { printk(KERN_INFO "%s: Disabled Multicast RS ", dev->name); ndev->cnf.rtr_solicits = 0; } #endif |
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#ifdef CONFIG_IPV6_PRIVACY |
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INIT_LIST_HEAD(&ndev->tempaddr_list); |
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setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
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if ((dev->flags&IFF_LOOPBACK) || dev->type == ARPHRD_TUNNEL || |
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dev->type == ARPHRD_TUNNEL6 || |
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dev->type == ARPHRD_SIT || |
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dev->type == ARPHRD_NONE) { |
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ndev->cnf.use_tempaddr = -1; } else { in6_dev_hold(ndev); ipv6_regen_rndid((unsigned long) ndev); } |
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#endif |
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if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
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ndev->if_flags |= IF_READY; |
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ipv6_mc_init_dev(ndev); ndev->tstamp = jiffies; |
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addrconf_sysctl_register(ndev); |
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/* protected by rtnl_lock */ |
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RCU_INIT_POINTER(dev->ip6_ptr, ndev); |
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/* Join all-node multicast group */ |
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ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
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return ndev; } |
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static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
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{ struct inet6_dev *idev; ASSERT_RTNL(); |
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idev = __in6_dev_get(dev); if (!idev) { idev = ipv6_add_dev(dev); if (!idev) |
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return NULL; } |
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if (dev->flags&IFF_UP) ipv6_mc_up(idev); return idev; } #ifdef CONFIG_SYSCTL static void dev_forward_change(struct inet6_dev *idev) { struct net_device *dev; struct inet6_ifaddr *ifa; |
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if (!idev) return; dev = idev->dev; |
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if (idev->cnf.forwarding) dev_disable_lro(dev); |
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if (dev && (dev->flags & IFF_MULTICAST)) { |
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if (idev->cnf.forwarding) |
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ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
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else |
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ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
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} |
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list_for_each_entry(ifa, &idev->addr_list, if_list) { |
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|
455 456 |
if (ifa->flags&IFA_F_TENTATIVE) continue; |
1da177e4c
|
457 458 459 460 461 462 |
if (idev->cnf.forwarding) addrconf_join_anycast(ifa); else addrconf_leave_anycast(ifa); } } |
e186932b3
|
463 |
static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4c
|
464 465 466 |
{ struct net_device *dev; struct inet6_dev *idev; |
c6d14c845
|
467 468 |
rcu_read_lock(); for_each_netdev_rcu(net, dev) { |
1da177e4c
|
469 470 |
idev = __in6_dev_get(dev); if (idev) { |
e186932b3
|
471 472 |
int changed = (!idev->cnf.forwarding) ^ (!newf); idev->cnf.forwarding = newf; |
1da177e4c
|
473 474 475 |
if (changed) dev_forward_change(idev); } |
1da177e4c
|
476 |
} |
c6d14c845
|
477 |
rcu_read_unlock(); |
1da177e4c
|
478 |
} |
c8fecf224
|
479 |
|
b325fddb7
|
480 |
static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) |
c8fecf224
|
481 |
{ |
bff16c2f9
|
482 483 484 |
struct net *net; net = (struct net *)table->extra2; |
441fc2a23
|
485 |
if (p == &net->ipv6.devconf_dflt->forwarding) |
b325fddb7
|
486 |
return 0; |
88af182e3
|
487 488 489 |
if (!rtnl_trylock()) { /* Restore the original values before restarting */ *p = old; |
5007392d8
|
490 |
return restart_syscall(); |
88af182e3
|
491 |
} |
c8fecf224
|
492 |
|
e186932b3
|
493 494 495 496 |
if (p == &net->ipv6.devconf_all->forwarding) { __s32 newf = net->ipv6.devconf_all->forwarding; net->ipv6.devconf_dflt->forwarding = newf; addrconf_forward_change(net, newf); |
c8fecf224
|
497 498 |
} else if ((!*p) ^ (!old)) dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb0
|
499 |
rtnl_unlock(); |
c8fecf224
|
500 501 |
if (*p) |
7b4da5322
|
502 |
rt6_purge_dflt_routers(net); |
b325fddb7
|
503 |
return 1; |
c8fecf224
|
504 |
} |
1da177e4c
|
505 |
#endif |
5c578aedc
|
506 |
/* Nobody refers to this ifaddr, destroy it */ |
1da177e4c
|
507 508 |
void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) { |
c2e21293c
|
509 |
WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792ca
|
510 |
|
1da177e4c
|
511 512 513 514 515 516 517 518 |
#ifdef NET_REFCNT_DEBUG printk(KERN_DEBUG "inet6_ifa_finish_destroy "); #endif in6_dev_put(ifp->idev); if (del_timer(&ifp->timer)) |
e21e8467d
|
519 520 |
pr_notice("Timer is still running, when freeing ifa=%p ", ifp); |
1da177e4c
|
521 |
|
e9d3e0849
|
522 |
if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
e21e8467d
|
523 524 |
pr_warning("Freeing alive inet6 address %p ", ifp); |
1da177e4c
|
525 526 |
return; } |
d8d1f30b9
|
527 |
dst_release(&ifp->rt->dst); |
1da177e4c
|
528 |
|
e57859854
|
529 |
kfree_rcu(ifp, rcu); |
1da177e4c
|
530 |
} |
e55ffac60
|
531 532 533 |
static void ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) { |
502a2ffd7
|
534 |
struct list_head *p; |
8a6ce0c08
|
535 |
int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac60
|
536 537 538 539 540 |
/* * Each device address list is sorted in order of scope - * global before linklocal. */ |
502a2ffd7
|
541 542 543 |
list_for_each(p, &idev->addr_list) { struct inet6_ifaddr *ifa = list_entry(p, struct inet6_ifaddr, if_list); |
8a6ce0c08
|
544 |
if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac60
|
545 546 |
break; } |
b54c9b98b
|
547 |
list_add_tail(&ifp->if_list, p); |
e55ffac60
|
548 |
} |
3a88a81d8
|
549 |
static u32 ipv6_addr_hash(const struct in6_addr *addr) |
3eb84f492
|
550 |
{ |
3eb84f492
|
551 552 553 554 |
/* * We perform the hash function over the last 64 bits of the address * This will include the IEEE address token on links that support it. */ |
0eae88f31
|
555 556 |
return jhash_2words((__force u32)addr->s6_addr32[2], (__force u32)addr->s6_addr32[3], 0) |
3a88a81d8
|
557 |
& (IN6_ADDR_HSIZE - 1); |
3eb84f492
|
558 |
} |
1da177e4c
|
559 560 561 562 |
/* On success it returns ifp with increased reference count */ static struct inet6_ifaddr * ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, |
e431b8c00
|
563 |
int scope, u32 flags) |
1da177e4c
|
564 565 566 |
{ struct inet6_ifaddr *ifa = NULL; struct rt6_info *rt; |
3a88a81d8
|
567 |
unsigned int hash; |
1da177e4c
|
568 |
int err = 0; |
d68b82705
|
569 570 571 572 573 574 575 |
int addr_type = ipv6_addr_type(addr); if (addr_type == IPV6_ADDR_ANY || addr_type & IPV6_ADDR_MULTICAST || (!(idev->dev->flags & IFF_LOOPBACK) && addr_type & IPV6_ADDR_LOOPBACK)) return ERR_PTR(-EADDRNOTAVAIL); |
1da177e4c
|
576 |
|
8814c4b53
|
577 |
rcu_read_lock_bh(); |
1da177e4c
|
578 579 580 581 |
if (idev->dead) { err = -ENODEV; /*XXX*/ goto out2; } |
56d417b12
|
582 |
if (idev->cnf.disable_ipv6) { |
9bdd8d40c
|
583 584 585 |
err = -EACCES; goto out2; } |
5c578aedc
|
586 |
spin_lock(&addrconf_hash_lock); |
1da177e4c
|
587 588 |
/* Ignore adding duplicate addresses on an interface */ |
c346dca10
|
589 |
if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4c
|
590 591 592 593 594 |
ADBG(("ipv6_add_addr: already assigned ")); err = -EEXIST; goto out; } |
322f74a43
|
595 |
ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4c
|
596 597 598 599 600 601 602 |
if (ifa == NULL) { ADBG(("ipv6_add_addr: malloc failed ")); err = -ENOBUFS; goto out; } |
8f0315190
|
603 |
rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4c
|
604 605 606 607 |
if (IS_ERR(rt)) { err = PTR_ERR(rt); goto out; } |
4e3fd7a06
|
608 |
ifa->addr = *addr; |
1da177e4c
|
609 610 |
spin_lock_init(&ifa->lock); |
e9d3e0849
|
611 |
spin_lock_init(&ifa->state_lock); |
1da177e4c
|
612 |
init_timer(&ifa->timer); |
c2e21293c
|
613 |
INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4c
|
614 615 616 617 618 |
ifa->timer.data = (unsigned long) ifa; ifa->scope = scope; ifa->prefix_len = pfxlen; ifa->flags = flags | IFA_F_TENTATIVE; ifa->cstamp = ifa->tstamp = jiffies; |
57f5f544f
|
619 |
ifa->rt = rt; |
1da177e4c
|
620 621 622 623 624 625 626 |
ifa->idev = idev; in6_dev_hold(idev); /* For caller */ in6_ifa_hold(ifa); /* Add to big hash table */ hash = ipv6_addr_hash(addr); |
5c578aedc
|
627 |
hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aedc
|
628 |
spin_unlock(&addrconf_hash_lock); |
1da177e4c
|
629 630 631 |
write_lock(&idev->lock); /* Add to inet6_dev unicast addr list. */ |
e55ffac60
|
632 |
ipv6_link_dev_addr(idev, ifa); |
1da177e4c
|
633 634 635 |
#ifdef CONFIG_IPV6_PRIVACY if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f1
|
636 |
list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4c
|
637 638 639 |
in6_ifa_hold(ifa); } #endif |
1da177e4c
|
640 641 642 |
in6_ifa_hold(ifa); write_unlock(&idev->lock); out2: |
8814c4b53
|
643 |
rcu_read_unlock_bh(); |
1da177e4c
|
644 |
|
fd92833a5
|
645 |
if (likely(err == 0)) |
e041c6834
|
646 |
atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
1da177e4c
|
647 648 649 650 651 652 653 |
else { kfree(ifa); ifa = ERR_PTR(err); } return ifa; out: |
5c578aedc
|
654 |
spin_unlock(&addrconf_hash_lock); |
1da177e4c
|
655 656 657 658 659 660 661 |
goto out2; } /* This function wants to get referenced ifp and releases it before return */ static void ipv6_del_addr(struct inet6_ifaddr *ifp) { |
502a2ffd7
|
662 |
struct inet6_ifaddr *ifa, *ifn; |
1da177e4c
|
663 |
struct inet6_dev *idev = ifp->idev; |
4c5ff6a6f
|
664 |
int state; |
1da177e4c
|
665 666 |
int deleted = 0, onlink = 0; unsigned long expires = jiffies; |
4c5ff6a6f
|
667 668 |
spin_lock_bh(&ifp->state_lock); state = ifp->state; |
e9d3e0849
|
669 |
ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6f
|
670 671 672 673 |
spin_unlock_bh(&ifp->state_lock); if (state == INET6_IFADDR_STATE_DEAD) goto out; |
1da177e4c
|
674 |
|
5c578aedc
|
675 676 |
spin_lock_bh(&addrconf_hash_lock); hlist_del_init_rcu(&ifp->addr_lst); |
5c578aedc
|
677 |
spin_unlock_bh(&addrconf_hash_lock); |
1da177e4c
|
678 679 680 681 |
write_lock_bh(&idev->lock); #ifdef CONFIG_IPV6_PRIVACY if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f1
|
682 683 684 685 |
list_del(&ifp->tmp_list); if (ifp->ifpub) { in6_ifa_put(ifp->ifpub); ifp->ifpub = NULL; |
1da177e4c
|
686 |
} |
372e6c8f1
|
687 |
__in6_ifa_put(ifp); |
1da177e4c
|
688 689 |
} #endif |
502a2ffd7
|
690 |
list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4c
|
691 |
if (ifa == ifp) { |
502a2ffd7
|
692 |
list_del_init(&ifp->if_list); |
1da177e4c
|
693 |
__in6_ifa_put(ifp); |
502a2ffd7
|
694 |
|
1da177e4c
|
695 696 697 |
if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) break; deleted = 1; |
1d1428045
|
698 |
continue; |
1da177e4c
|
699 700 701 702 703 704 705 706 707 708 709 710 711 712 |
} else if (ifp->flags & IFA_F_PERMANENT) { if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, ifp->prefix_len)) { if (ifa->flags & IFA_F_PERMANENT) { onlink = 1; if (deleted) break; } else { unsigned long lifetime; if (!onlink) onlink = -1; spin_lock(&ifa->lock); |
4bed72e4f
|
713 714 715 716 717 718 719 |
lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); /* * Note: Because this address is * not permanent, lifetime < * LONG_MAX / HZ here. */ |
1da177e4c
|
720 721 722 723 724 725 726 727 728 |
if (time_before(expires, ifa->tstamp + lifetime * HZ)) expires = ifa->tstamp + lifetime * HZ; spin_unlock(&ifa->lock); } } } } write_unlock_bh(&idev->lock); |
b22385664
|
729 |
addrconf_del_timer(ifp); |
1da177e4c
|
730 |
ipv6_ifa_notify(RTM_DELADDR, ifp); |
e041c6834
|
731 |
atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); |
1da177e4c
|
732 |
|
1da177e4c
|
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 |
/* * Purge or update corresponding prefix * * 1) we don't purge prefix here if address was not permanent. * prefix is managed by its own lifetime. * 2) if there're no addresses, delete prefix. * 3) if there're still other permanent address(es), * corresponding prefix is still permanent. * 4) otherwise, update prefix lifetime to the * longest valid lifetime among the corresponding * addresses on the device. * Note: subsequent RA will update lifetime. * * --yoshfuji */ if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { struct in6_addr prefix; struct rt6_info *rt; |
c346dca10
|
751 |
struct net *net = dev_net(ifp->idev->dev); |
1da177e4c
|
752 |
ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
6fda73500
|
753 |
rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); |
1da177e4c
|
754 |
|
2b5ead464
|
755 |
if (rt && addrconf_is_prefix_route(rt)) { |
1da177e4c
|
756 |
if (onlink == 0) { |
e0a1ad73d
|
757 |
ip6_del_rt(rt); |
1da177e4c
|
758 759 |
rt = NULL; } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { |
d19185428
|
760 |
rt->dst.expires = expires; |
1da177e4c
|
761 762 763 |
rt->rt6i_flags |= RTF_EXPIRES; } } |
d8d1f30b9
|
764 |
dst_release(&rt->dst); |
1da177e4c
|
765 |
} |
c3968a857
|
766 767 |
/* clean up prefsrc entries */ rt6_remove_prefsrc(ifp); |
4c5ff6a6f
|
768 |
out: |
1da177e4c
|
769 770 771 772 773 774 775 776 |
in6_ifa_put(ifp); } #ifdef CONFIG_IPV6_PRIVACY static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) { struct inet6_dev *idev = ifp->idev; struct in6_addr addr, *tmpaddr; |
76f793e3a
|
777 |
unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf97
|
778 |
unsigned long regen_advance; |
1da177e4c
|
779 780 781 |
int tmp_plen; int ret = 0; int max_addresses; |
95c385b4d
|
782 |
u32 addr_flags; |
76f793e3a
|
783 |
unsigned long now = jiffies; |
1da177e4c
|
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 |
write_lock(&idev->lock); if (ift) { spin_lock_bh(&ift->lock); memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); spin_unlock_bh(&ift->lock); tmpaddr = &addr; } else { tmpaddr = NULL; } retry: in6_dev_hold(idev); if (idev->cnf.use_tempaddr <= 0) { write_unlock(&idev->lock); printk(KERN_INFO "ipv6_create_tempaddr(): use_tempaddr is disabled. "); in6_dev_put(idev); ret = -1; goto out; } spin_lock_bh(&ifp->lock); if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { idev->cnf.use_tempaddr = -1; /*XXX*/ spin_unlock_bh(&ifp->lock); write_unlock(&idev->lock); printk(KERN_WARNING "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support. "); in6_dev_put(idev); ret = -1; goto out; } in6_ifa_hold(ifp); memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { spin_unlock_bh(&ifp->lock); write_unlock(&idev->lock); printk(KERN_WARNING "ipv6_create_tempaddr(): regeneration of randomized interface id failed. "); in6_ifa_put(ifp); in6_dev_put(idev); ret = -1; goto out; } memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3a
|
831 |
age = (now - ifp->tstamp) / HZ; |
1da177e4c
|
832 833 |
tmp_valid_lft = min_t(__u32, ifp->valid_lft, |
7a876b0ef
|
834 |
idev->cnf.temp_valid_lft + age); |
1ab1457c4
|
835 836 |
tmp_prefered_lft = min_t(__u32, ifp->prefered_lft, |
7a876b0ef
|
837 |
idev->cnf.temp_prefered_lft + age - |
784e2710c
|
838 |
idev->cnf.max_desync_factor); |
1da177e4c
|
839 840 |
tmp_plen = ifp->prefix_len; max_addresses = idev->cnf.max_addresses; |
1da177e4c
|
841 842 |
tmp_tstamp = ifp->tstamp; spin_unlock_bh(&ifp->lock); |
eac55bf97
|
843 844 845 |
regen_advance = idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time / HZ; |
1da177e4c
|
846 |
write_unlock(&idev->lock); |
95c385b4d
|
847 |
|
eac55bf97
|
848 849 850 851 852 853 854 855 856 857 858 |
/* A temporary address is created only if this calculated Preferred * Lifetime is greater than REGEN_ADVANCE time units. In particular, * an implementation must not create a temporary address with a zero * Preferred Lifetime. */ if (tmp_prefered_lft <= regen_advance) { in6_ifa_put(ifp); in6_dev_put(idev); ret = -1; goto out; } |
95c385b4d
|
859 860 861 862 |
addr_flags = IFA_F_TEMPORARY; /* set in addrconf_prefix_rcv() */ if (ifp->flags & IFA_F_OPTIMISTIC) addr_flags |= IFA_F_OPTIMISTIC; |
1da177e4c
|
863 |
ift = !max_addresses || |
1ab1457c4
|
864 |
ipv6_count_addresses(idev) < max_addresses ? |
1da177e4c
|
865 |
ipv6_add_addr(idev, &addr, tmp_plen, |
95c385b4d
|
866 867 |
ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, addr_flags) : NULL; |
1da177e4c
|
868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 |
if (!ift || IS_ERR(ift)) { in6_ifa_put(ifp); in6_dev_put(idev); printk(KERN_INFO "ipv6_create_tempaddr(): retry temporary address regeneration. "); tmpaddr = &addr; write_lock(&idev->lock); goto retry; } spin_lock_bh(&ift->lock); ift->ifpub = ifp; ift->valid_lft = tmp_valid_lft; ift->prefered_lft = tmp_prefered_lft; |
76f793e3a
|
883 |
ift->cstamp = now; |
1da177e4c
|
884 885 886 887 888 889 890 891 892 893 894 895 |
ift->tstamp = tmp_tstamp; spin_unlock_bh(&ift->lock); addrconf_dad_start(ift, 0); in6_ifa_put(ift); in6_dev_put(idev); out: return ret; } #endif /* |
072047e4d
|
896 |
* Choose an appropriate source address (RFC3484) |
1da177e4c
|
897 |
*/ |
a9b05723f
|
898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 |
enum { IPV6_SADDR_RULE_INIT = 0, IPV6_SADDR_RULE_LOCAL, IPV6_SADDR_RULE_SCOPE, IPV6_SADDR_RULE_PREFERRED, #ifdef CONFIG_IPV6_MIP6 IPV6_SADDR_RULE_HOA, #endif IPV6_SADDR_RULE_OIF, IPV6_SADDR_RULE_LABEL, #ifdef CONFIG_IPV6_PRIVACY IPV6_SADDR_RULE_PRIVACY, #endif IPV6_SADDR_RULE_ORCHID, IPV6_SADDR_RULE_PREFIX, IPV6_SADDR_RULE_MAX }; |
072047e4d
|
915 |
struct ipv6_saddr_score { |
a9b05723f
|
916 917 918 919 920 921 |
int rule; int addr_type; struct inet6_ifaddr *ifa; DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); int scopedist; int matchlen; |
072047e4d
|
922 |
}; |
a9b05723f
|
923 |
struct ipv6_saddr_dst { |
9acd9f3ae
|
924 |
const struct in6_addr *addr; |
a9b05723f
|
925 926 927 |
int ifindex; int scope; int label; |
7cbca67c0
|
928 |
unsigned int prefs; |
a9b05723f
|
929 |
}; |
072047e4d
|
930 |
|
b6f99a211
|
931 |
static inline int ipv6_saddr_preferred(int type) |
1da177e4c
|
932 |
{ |
45bb00609
|
933 |
if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4d
|
934 935 |
return 1; return 0; |
1da177e4c
|
936 |
} |
3de232554
|
937 938 |
static int ipv6_get_saddr_eval(struct net *net, struct ipv6_saddr_score *score, |
a9b05723f
|
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 |
struct ipv6_saddr_dst *dst, int i) { int ret; if (i <= score->rule) { switch (i) { case IPV6_SADDR_RULE_SCOPE: ret = score->scopedist; break; case IPV6_SADDR_RULE_PREFIX: ret = score->matchlen; break; default: ret = !!test_bit(i, score->scorebits); } goto out; } switch (i) { case IPV6_SADDR_RULE_INIT: /* Rule 0: remember if hiscore is not ready yet */ ret = !!score->ifa; break; case IPV6_SADDR_RULE_LOCAL: /* Rule 1: Prefer same address */ ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); break; case IPV6_SADDR_RULE_SCOPE: /* Rule 2: Prefer appropriate scope * * ret * ^ * -1 | d 15 * ---+--+-+---> scope * | * | d is scope of the destination. * B-d | \ * | \ <- smaller scope is better if * B-15 | \ if scope is enough for destinaion. * | ret = B - scope (-1 <= scope >= d <= 15). * d-C-1 | / * |/ <- greater is better * -C / if scope is not enough for destination. * /| ret = scope - C (-1 <= d < scope <= 15). * * d - C - 1 < B -15 (for all -1 <= d <= 15). * C > d + 14 - B >= 15 + 14 - B = 29 - B. * Assume B = 0 and we get C > 29. */ ret = __ipv6_addr_src_scope(score->addr_type); if (ret >= dst->scope) ret = -ret; else ret -= 128; /* 30 is enough */ score->scopedist = ret; break; case IPV6_SADDR_RULE_PREFERRED: /* Rule 3: Avoid deprecated and optimistic addresses */ ret = ipv6_saddr_preferred(score->addr_type) || !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); break; #ifdef CONFIG_IPV6_MIP6 case IPV6_SADDR_RULE_HOA: |
7cbca67c0
|
1003 |
{ |
a9b05723f
|
1004 |
/* Rule 4: Prefer home address */ |
7cbca67c0
|
1005 1006 |
int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; |
a9b05723f
|
1007 |
break; |
7cbca67c0
|
1008 |
} |
a9b05723f
|
1009 1010 1011 1012 1013 1014 1015 1016 |
#endif case IPV6_SADDR_RULE_OIF: /* Rule 5: Prefer outgoing interface */ ret = (!dst->ifindex || dst->ifindex == score->ifa->idev->dev->ifindex); break; case IPV6_SADDR_RULE_LABEL: /* Rule 6: Prefer matching label */ |
3de232554
|
1017 1018 |
ret = ipv6_addr_label(net, &score->ifa->addr, score->addr_type, |
a9b05723f
|
1019 1020 1021 1022 |
score->ifa->idev->dev->ifindex) == dst->label; break; #ifdef CONFIG_IPV6_PRIVACY case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c0
|
1023 |
{ |
a9b05723f
|
1024 |
/* Rule 7: Prefer public address |
25985edce
|
1025 |
* Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723f
|
1026 |
*/ |
7cbca67c0
|
1027 1028 1029 1030 |
int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? !!(dst->prefs & IPV6_PREFER_SRC_TMP) : score->ifa->idev->cnf.use_tempaddr >= 2; ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; |
a9b05723f
|
1031 |
break; |
7cbca67c0
|
1032 |
} |
a9b05723f
|
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 |
#endif case IPV6_SADDR_RULE_ORCHID: /* Rule 8-: Prefer ORCHID vs ORCHID or * non-ORCHID vs non-ORCHID */ ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ ipv6_addr_orchid(dst->addr)); break; case IPV6_SADDR_RULE_PREFIX: /* Rule 8: Use longest matching prefix */ score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); break; default: ret = 0; } if (ret) __set_bit(i, score->scorebits); score->rule = i; out: return ret; } |
191cd5825
|
1056 |
int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev, |
9acd9f3ae
|
1057 |
const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c0
|
1058 |
struct in6_addr *saddr) |
1da177e4c
|
1059 |
{ |
a9b05723f
|
1060 1061 |
struct ipv6_saddr_score scores[2], *score = &scores[0], *hiscore = &scores[1]; |
a9b05723f
|
1062 |
struct ipv6_saddr_dst dst; |
072047e4d
|
1063 |
struct net_device *dev; |
a9b05723f
|
1064 |
int dst_type; |
1da177e4c
|
1065 |
|
a9b05723f
|
1066 1067 1068 1069 |
dst_type = __ipv6_addr_type(daddr); dst.addr = daddr; dst.ifindex = dst_dev ? dst_dev->ifindex : 0; dst.scope = __ipv6_addr_src_scope(dst_type); |
3de232554
|
1070 |
dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c0
|
1071 |
dst.prefs = prefs; |
a9b05723f
|
1072 1073 1074 |
hiscore->rule = -1; hiscore->ifa = NULL; |
1da177e4c
|
1075 |
|
8814c4b53
|
1076 |
rcu_read_lock(); |
1da177e4c
|
1077 |
|
c6d14c845
|
1078 |
for_each_netdev_rcu(net, dev) { |
072047e4d
|
1079 |
struct inet6_dev *idev; |
072047e4d
|
1080 |
|
a9b05723f
|
1081 |
/* Candidate Source Address (section 4) |
072047e4d
|
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 |
* - multicast and link-local destination address, * the set of candidate source address MUST only * include addresses assigned to interfaces * belonging to the same link as the outgoing * interface. * (- For site-local destination addresses, the * set of candidate source addresses MUST only * include addresses assigned to interfaces * belonging to the same site as the outgoing * interface.) */ |
a9b05723f
|
1093 1094 1095 |
if (((dst_type & IPV6_ADDR_MULTICAST) || dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && dst.ifindex && dev->ifindex != dst.ifindex) |
072047e4d
|
1096 |
continue; |
1da177e4c
|
1097 |
|
1da177e4c
|
1098 |
idev = __in6_dev_get(dev); |
072047e4d
|
1099 1100 1101 1102 |
if (!idev) continue; read_lock_bh(&idev->lock); |
502a2ffd7
|
1103 |
list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723f
|
1104 |
int i; |
072047e4d
|
1105 |
|
a9b05723f
|
1106 |
/* |
6b3ae80a6
|
1107 1108 1109 |
* - Tentative Address (RFC2462 section 5.4) * - A tentative address is not considered * "assigned to an interface" in the traditional |
95c385b4d
|
1110 |
* sense, unless it is also flagged as optimistic. |
6b3ae80a6
|
1111 |
* - Candidate Source Address (section 4) |
072047e4d
|
1112 1113 1114 1115 |
* - In any case, anycast addresses, multicast * addresses, and the unspecified address MUST * NOT be included in a candidate set. */ |
a9b05723f
|
1116 1117 |
if ((score->ifa->flags & IFA_F_TENTATIVE) && (!(score->ifa->flags & IFA_F_OPTIMISTIC))) |
6b3ae80a6
|
1118 |
continue; |
a9b05723f
|
1119 1120 1121 1122 1123 |
score->addr_type = __ipv6_addr_type(&score->ifa->addr); if (unlikely(score->addr_type == IPV6_ADDR_ANY || score->addr_type & IPV6_ADDR_MULTICAST)) { |
072047e4d
|
1124 |
LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c4
|
1125 |
"ADDRCONF: unspecified / multicast address " |
072047e4d
|
1126 1127 1128 1129 |
"assigned as unicast address on %s", dev->name); continue; } |
a9b05723f
|
1130 1131 1132 1133 1134 |
score->rule = -1; bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { int minihiscore, miniscore; |
3de232554
|
1135 1136 |
minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); miniscore = ipv6_get_saddr_eval(net, score, &dst, i); |
a9b05723f
|
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 |
if (minihiscore > miniscore) { if (i == IPV6_SADDR_RULE_SCOPE && score->scopedist > 0) { /* * special case: * each remaining entry * has too small (not enough) * scope, because ifa entries * are sorted by their scope * values. */ goto try_nextdev; } break; } else if (minihiscore < miniscore) { |
a9b05723f
|
1153 1154 1155 1156 |
if (hiscore->ifa) in6_ifa_put(hiscore->ifa); in6_ifa_hold(score->ifa); |
a0bffffc1
|
1157 |
swap(hiscore, score); |
a9b05723f
|
1158 1159 1160 1161 1162 |
/* restore our iterator */ score->ifa = hiscore->ifa; break; |
1da177e4c
|
1163 |
} |
072047e4d
|
1164 |
} |
1da177e4c
|
1165 |
} |
a9b05723f
|
1166 |
try_nextdev: |
072047e4d
|
1167 |
read_unlock_bh(&idev->lock); |
1da177e4c
|
1168 |
} |
8814c4b53
|
1169 |
rcu_read_unlock(); |
1da177e4c
|
1170 |
|
a9b05723f
|
1171 |
if (!hiscore->ifa) |
072047e4d
|
1172 |
return -EADDRNOTAVAIL; |
1ab1457c4
|
1173 |
|
4e3fd7a06
|
1174 |
*saddr = hiscore->ifa->addr; |
a9b05723f
|
1175 |
in6_ifa_put(hiscore->ifa); |
072047e4d
|
1176 |
return 0; |
1da177e4c
|
1177 |
} |
5e5f3f0f8
|
1178 |
EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4c
|
1179 |
|
95c385b4d
|
1180 1181 |
int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, unsigned char banned_flags) |
1da177e4c
|
1182 1183 1184 |
{ struct inet6_dev *idev; int err = -EADDRNOTAVAIL; |
8814c4b53
|
1185 |
rcu_read_lock(); |
e21e8467d
|
1186 1187 |
idev = __in6_dev_get(dev); if (idev) { |
1da177e4c
|
1188 1189 1190 |
struct inet6_ifaddr *ifp; read_lock_bh(&idev->lock); |
502a2ffd7
|
1191 1192 1193 |
list_for_each_entry(ifp, &idev->addr_list, if_list) { if (ifp->scope == IFA_LINK && !(ifp->flags & banned_flags)) { |
4e3fd7a06
|
1194 |
*addr = ifp->addr; |
1da177e4c
|
1195 1196 1197 1198 1199 1200 |
err = 0; break; } } read_unlock_bh(&idev->lock); } |
8814c4b53
|
1201 |
rcu_read_unlock(); |
1da177e4c
|
1202 1203 1204 1205 1206 1207 1208 1209 1210 |
return err; } static int ipv6_count_addresses(struct inet6_dev *idev) { int cnt = 0; struct inet6_ifaddr *ifp; read_lock_bh(&idev->lock); |
502a2ffd7
|
1211 |
list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4c
|
1212 1213 1214 1215 |
cnt++; read_unlock_bh(&idev->lock); return cnt; } |
b71d1d426
|
1216 |
int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
bfeade087
|
1217 |
struct net_device *dev, int strict) |
1da177e4c
|
1218 |
{ |
eedf042a6
|
1219 |
struct inet6_ifaddr *ifp; |
c2e21293c
|
1220 |
struct hlist_node *node; |
3a88a81d8
|
1221 |
unsigned int hash = ipv6_addr_hash(addr); |
1da177e4c
|
1222 |
|
5c578aedc
|
1223 1224 |
rcu_read_lock_bh(); hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fbf
|
1225 |
if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade087
|
1226 |
continue; |
1da177e4c
|
1227 |
if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a6
|
1228 1229 1230 1231 1232 |
!(ifp->flags&IFA_F_TENTATIVE) && (dev == NULL || ifp->idev->dev == dev || !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { rcu_read_unlock_bh(); return 1; |
1da177e4c
|
1233 1234 |
} } |
5c578aedc
|
1235 |
|
eedf042a6
|
1236 1237 |
rcu_read_unlock_bh(); return 0; |
1da177e4c
|
1238 |
} |
7159039a1
|
1239 |
EXPORT_SYMBOL(ipv6_chk_addr); |
3e81c6da3
|
1240 1241 |
static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, struct net_device *dev) |
1da177e4c
|
1242 |
{ |
3e81c6da3
|
1243 |
unsigned int hash = ipv6_addr_hash(addr); |
c2e21293c
|
1244 1245 |
struct inet6_ifaddr *ifp; struct hlist_node *node; |
1da177e4c
|
1246 |
|
c2e21293c
|
1247 |
hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fbf
|
1248 |
if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655e
|
1249 |
continue; |
1da177e4c
|
1250 1251 |
if (ipv6_addr_equal(&ifp->addr, addr)) { if (dev == NULL || ifp->idev->dev == dev) |
3e81c6da3
|
1252 |
return true; |
1da177e4c
|
1253 1254 |
} } |
3e81c6da3
|
1255 |
return false; |
1da177e4c
|
1256 |
} |
b71d1d426
|
1257 |
int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb848
|
1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 |
{ struct inet6_dev *idev; struct inet6_ifaddr *ifa; int onlink; onlink = 0; rcu_read_lock(); idev = __in6_dev_get(dev); if (idev) { read_lock_bh(&idev->lock); |
502a2ffd7
|
1268 |
list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb848
|
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 |
onlink = ipv6_prefix_equal(addr, &ifa->addr, ifa->prefix_len); if (onlink) break; } read_unlock_bh(&idev->lock); } rcu_read_unlock(); return onlink; } EXPORT_SYMBOL(ipv6_chk_prefix); |
9acd9f3ae
|
1281 |
struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6b
|
1282 |
struct net_device *dev, int strict) |
1da177e4c
|
1283 |
{ |
b79d1d54c
|
1284 |
struct inet6_ifaddr *ifp, *result = NULL; |
3a88a81d8
|
1285 |
unsigned int hash = ipv6_addr_hash(addr); |
b79d1d54c
|
1286 |
struct hlist_node *node; |
1da177e4c
|
1287 |
|
5c578aedc
|
1288 |
rcu_read_lock_bh(); |
4f70ecca9
|
1289 |
hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) { |
878628fbf
|
1290 |
if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6b
|
1291 |
continue; |
1da177e4c
|
1292 1293 1294 |
if (ipv6_addr_equal(&ifp->addr, addr)) { if (dev == NULL || ifp->idev->dev == dev || !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54c
|
1295 |
result = ifp; |
1da177e4c
|
1296 1297 1298 1299 1300 |
in6_ifa_hold(ifp); break; } } } |
5c578aedc
|
1301 |
rcu_read_unlock_bh(); |
1da177e4c
|
1302 |
|
b79d1d54c
|
1303 |
return result; |
1da177e4c
|
1304 |
} |
1da177e4c
|
1305 |
/* Gets referenced address, destroys ifaddr */ |
cc411d0ba
|
1306 |
static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4c
|
1307 |
{ |
1da177e4c
|
1308 1309 1310 1311 |
if (ifp->flags&IFA_F_PERMANENT) { spin_lock_bh(&ifp->lock); addrconf_del_timer(ifp); ifp->flags |= IFA_F_TENTATIVE; |
cc411d0ba
|
1312 1313 |
if (dad_failed) ifp->flags |= IFA_F_DADFAILED; |
1da177e4c
|
1314 |
spin_unlock_bh(&ifp->lock); |
e2577a065
|
1315 1316 |
if (dad_failed) ipv6_ifa_notify(0, ifp); |
1da177e4c
|
1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 |
in6_ifa_put(ifp); #ifdef CONFIG_IPV6_PRIVACY } else if (ifp->flags&IFA_F_TEMPORARY) { struct inet6_ifaddr *ifpub; spin_lock_bh(&ifp->lock); ifpub = ifp->ifpub; if (ifpub) { in6_ifa_hold(ifpub); spin_unlock_bh(&ifp->lock); ipv6_create_tempaddr(ifpub, ifp); in6_ifa_put(ifpub); } else { spin_unlock_bh(&ifp->lock); } ipv6_del_addr(ifp); #endif } else ipv6_del_addr(ifp); } |
f2344a131
|
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 |
static int addrconf_dad_end(struct inet6_ifaddr *ifp) { int err = -ENOENT; spin_lock(&ifp->state_lock); if (ifp->state == INET6_IFADDR_STATE_DAD) { ifp->state = INET6_IFADDR_STATE_POSTDAD; err = 0; } spin_unlock(&ifp->state_lock); return err; } |
3c21edbd1
|
1349 1350 |
void addrconf_dad_failure(struct inet6_ifaddr *ifp) { |
1b34be74c
|
1351 |
struct inet6_dev *idev = ifp->idev; |
9bdd8d40c
|
1352 |
|
853dc2e03
|
1353 1354 |
if (addrconf_dad_end(ifp)) { in6_ifa_put(ifp); |
f2344a131
|
1355 |
return; |
853dc2e03
|
1356 |
} |
f2344a131
|
1357 |
|
9bdd8d40c
|
1358 |
if (net_ratelimit()) |
0522fea65
|
1359 1360 1361 |
printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected! ", ifp->idev->dev->name, &ifp->addr); |
9bdd8d40c
|
1362 |
|
1b34be74c
|
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 |
if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { struct in6_addr addr; addr.s6_addr32[0] = htonl(0xfe800000); addr.s6_addr32[1] = 0; if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && ipv6_addr_equal(&ifp->addr, &addr)) { /* DAD failed for link-local based on MAC address */ idev->cnf.disable_ipv6 = 1; |
9bdd8d40c
|
1373 1374 1375 1376 |
printk(KERN_INFO "%s: IPv6 being disabled! ", ifp->idev->dev->name); |
1b34be74c
|
1377 1378 |
} } |
cc411d0ba
|
1379 |
addrconf_dad_stop(ifp, 1); |
3c21edbd1
|
1380 |
} |
1da177e4c
|
1381 1382 |
/* Join to solicited addr multicast group. */ |
b71d1d426
|
1383 |
void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4c
|
1384 1385 1386 1387 1388 1389 1390 1391 1392 |
{ struct in6_addr maddr; if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) return; addrconf_addr_solict_mult(addr, &maddr); ipv6_dev_mc_inc(dev, &maddr); } |
b71d1d426
|
1393 |
void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4c
|
1394 1395 1396 1397 1398 1399 1400 1401 1402 |
{ struct in6_addr maddr; if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) return; addrconf_addr_solict_mult(addr, &maddr); __ipv6_dev_mc_dec(idev, &maddr); } |
20380731b
|
1403 |
static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4c
|
1404 1405 |
{ struct in6_addr addr; |
2bda8a0c8
|
1406 1407 |
if (ifp->prefix_len == 127) /* RFC 6164 */ return; |
1da177e4c
|
1408 1409 1410 1411 1412 |
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); if (ipv6_addr_any(&addr)) return; ipv6_dev_ac_inc(ifp->idev->dev, &addr); } |
20380731b
|
1413 |
static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4c
|
1414 1415 |
{ struct in6_addr addr; |
32019e651
|
1416 1417 |
if (ifp->prefix_len == 127) /* RFC 6164 */ return; |
1da177e4c
|
1418 1419 1420 1421 1422 |
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); if (ipv6_addr_any(&addr)) return; __ipv6_dev_ac_dec(ifp->idev, &addr); } |
073a8e0e1
|
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 |
static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) { if (dev->addr_len != ETH_ALEN) return -1; memcpy(eui, dev->dev_addr, 3); memcpy(eui + 5, dev->dev_addr + 3, 3); /* * The zSeries OSA network cards can be shared among various * OS instances, but the OSA cards have only one MAC address. * This leads to duplicate address conflicts in conjunction * with IPv6 if more than one instance uses the same card. * * The driver for these cards can deliver a unique 16-bit * identifier for each instance sharing the same card. It is * placed instead of 0xFFFE in the interface identifier. The * "u" bit of the interface identifier is not inverted in this * case. Hence the resulting interface identifier has local * scope according to RFC2373. */ if (dev->dev_id) { eui[3] = (dev->dev_id >> 8) & 0xFF; eui[4] = dev->dev_id & 0xFF; } else { eui[3] = 0xFF; eui[4] = 0xFE; eui[0] ^= 2; } return 0; } static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) { /* XXX: inherit EUI-64 from other interface -- yoshfuji */ if (dev->addr_len != ARCNET_ALEN) return -1; memset(eui, 0, 7); eui[7] = *(u8*)dev->dev_addr; return 0; } static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) { if (dev->addr_len != INFINIBAND_ALEN) return -1; memcpy(eui, dev->dev_addr + 12, 8); eui[0] |= 2; return 0; } |
c61393ea8
|
1472 |
static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982baf
|
1473 |
{ |
9af28511b
|
1474 1475 |
if (addr == 0) return -1; |
dfd982baf
|
1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 |
eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || ipv4_is_lbcast(addr)) ? 0x00 : 0x02; eui[1] = 0; eui[2] = 0x5E; eui[3] = 0xFE; memcpy(eui + 4, &addr, 4); return 0; } |
dfd982baf
|
1488 1489 1490 1491 1492 1493 1494 |
static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) { if (dev->priv_flags & IFF_ISATAP) return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); return -1; } |
aee80b54b
|
1495 1496 1497 1498 |
static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) { return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); } |
1da177e4c
|
1499 1500 1501 1502 1503 1504 |
static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) { switch (dev->type) { case ARPHRD_ETHER: case ARPHRD_FDDI: case ARPHRD_IEEE802_TR: |
073a8e0e1
|
1505 |
return addrconf_ifid_eui48(eui, dev); |
1da177e4c
|
1506 |
case ARPHRD_ARCNET: |
073a8e0e1
|
1507 |
return addrconf_ifid_arcnet(eui, dev); |
1da177e4c
|
1508 |
case ARPHRD_INFINIBAND: |
073a8e0e1
|
1509 |
return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0a
|
1510 |
case ARPHRD_SIT: |
dfd982baf
|
1511 |
return addrconf_ifid_sit(eui, dev); |
aee80b54b
|
1512 1513 |
case ARPHRD_IPGRE: return addrconf_ifid_gre(eui, dev); |
1da177e4c
|
1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 |
} return -1; } static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) { int err = -1; struct inet6_ifaddr *ifp; read_lock_bh(&idev->lock); |
502a2ffd7
|
1524 |
list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4c
|
1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 |
if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { memcpy(eui, ifp->addr.s6_addr+8, 8); err = 0; break; } } read_unlock_bh(&idev->lock); return err; } #ifdef CONFIG_IPV6_PRIVACY /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ static int __ipv6_regen_rndid(struct inet6_dev *idev) { |
1da177e4c
|
1539 |
regen: |
955189efb
|
1540 |
get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4c
|
1541 |
idev->rndid[0] &= ~0x02; |
1da177e4c
|
1542 1543 1544 1545 1546 1547 1548 |
/* * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: * check if generated address is not inappropriate * * - Reserved subnet anycast (RFC 2526) * 11111101 11....11 1xxxxxxx |
c7dc89c0a
|
1549 |
* - ISATAP (RFC4214) 6.1 |
1da177e4c
|
1550 1551 1552 1553 |
* 00-00-5E-FE-xx-xx-xx-xx * - value 0 * - XXX: already assigned to an address on the device */ |
1ab1457c4
|
1554 |
if (idev->rndid[0] == 0xfd && |
1da177e4c
|
1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 |
(idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && (idev->rndid[7]&0x80)) goto regen; if ((idev->rndid[0]|idev->rndid[1]) == 0) { if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) goto regen; if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) goto regen; } return 0; } static void ipv6_regen_rndid(unsigned long data) { struct inet6_dev *idev = (struct inet6_dev *) data; unsigned long expires; |
8814c4b53
|
1572 |
rcu_read_lock_bh(); |
1da177e4c
|
1573 1574 1575 1576 1577 1578 1579 |
write_lock_bh(&idev->lock); if (idev->dead) goto out; if (__ipv6_regen_rndid(idev) < 0) goto out; |
1ab1457c4
|
1580 |
|
1da177e4c
|
1581 |
expires = jiffies + |
1ab1457c4
|
1582 |
idev->cnf.temp_prefered_lft * HZ - |
784e2710c
|
1583 1584 |
idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - idev->cnf.max_desync_factor * HZ; |
1da177e4c
|
1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 |
if (time_before(expires, jiffies)) { printk(KERN_WARNING "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s. ", idev->dev->name); goto out; } if (!mod_timer(&idev->regen_timer, expires)) in6_dev_hold(idev); out: write_unlock_bh(&idev->lock); |
8814c4b53
|
1598 |
rcu_read_unlock_bh(); |
1da177e4c
|
1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 |
in6_dev_put(idev); } static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { int ret = 0; if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) ret = __ipv6_regen_rndid(idev); return ret; } #endif /* * Add prefix route. */ static void addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, |
e431b8c00
|
1617 |
unsigned long expires, u32 flags) |
1da177e4c
|
1618 |
{ |
86872cb57
|
1619 1620 1621 1622 1623 1624 1625 |
struct fib6_config cfg = { .fc_table = RT6_TABLE_PREFIX, .fc_metric = IP6_RT_PRIO_ADDRCONF, .fc_ifindex = dev->ifindex, .fc_expires = expires, .fc_dst_len = plen, .fc_flags = RTF_UP | flags, |
c346dca10
|
1626 |
.fc_nlinfo.nl_net = dev_net(dev), |
f410a1fba
|
1627 |
.fc_protocol = RTPROT_KERNEL, |
86872cb57
|
1628 |
}; |
1da177e4c
|
1629 |
|
4e3fd7a06
|
1630 |
cfg.fc_dst = *pfx; |
1da177e4c
|
1631 1632 1633 1634 1635 |
/* Prevent useless cloning on PtP SIT. This thing is done here expecting that the whole class of non-broadcast devices need not cloning. */ |
0be669bb3
|
1636 |
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
86872cb57
|
1637 1638 |
if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) cfg.fc_flags |= RTF_NONEXTHOP; |
0be669bb3
|
1639 |
#endif |
1da177e4c
|
1640 |
|
86872cb57
|
1641 |
ip6_route_add(&cfg); |
1da177e4c
|
1642 |
} |
14ef37b6d
|
1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 |
static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, int plen, const struct net_device *dev, u32 flags, u32 noflags) { struct fib6_node *fn; struct rt6_info *rt = NULL; struct fib6_table *table; table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); if (table == NULL) return NULL; write_lock_bh(&table->tb6_lock); fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); if (!fn) goto out; for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d19185428
|
1662 |
if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6d
|
1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 |
continue; if ((rt->rt6i_flags & flags) != flags) continue; if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0)) continue; dst_hold(&rt->dst); break; } out: write_unlock_bh(&table->tb6_lock); return rt; } |
1da177e4c
|
1675 1676 1677 1678 |
/* Create "default" multicast route to the interface */ static void addrconf_add_mroute(struct net_device *dev) { |
86872cb57
|
1679 1680 1681 1682 1683 1684 |
struct fib6_config cfg = { .fc_table = RT6_TABLE_LOCAL, .fc_metric = IP6_RT_PRIO_ADDRCONF, .fc_ifindex = dev->ifindex, .fc_dst_len = 8, .fc_flags = RTF_UP, |
c346dca10
|
1685 |
.fc_nlinfo.nl_net = dev_net(dev), |
86872cb57
|
1686 1687 1688 1689 1690 |
}; ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); ip6_route_add(&cfg); |
1da177e4c
|
1691 |
} |
0be669bb3
|
1692 |
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4c
|
1693 1694 |
static void sit_route_add(struct net_device *dev) { |
86872cb57
|
1695 1696 1697 1698 1699 1700 |
struct fib6_config cfg = { .fc_table = RT6_TABLE_MAIN, .fc_metric = IP6_RT_PRIO_ADDRCONF, .fc_ifindex = dev->ifindex, .fc_dst_len = 96, .fc_flags = RTF_UP | RTF_NONEXTHOP, |
c346dca10
|
1701 |
.fc_nlinfo.nl_net = dev_net(dev), |
86872cb57
|
1702 |
}; |
1da177e4c
|
1703 1704 |
/* prefix length - 96 bits "::d.d.d.d" */ |
86872cb57
|
1705 |
ip6_route_add(&cfg); |
1da177e4c
|
1706 |
} |
0be669bb3
|
1707 |
#endif |
1da177e4c
|
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 |
static void addrconf_add_lroute(struct net_device *dev) { struct in6_addr addr; ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); addrconf_prefix_route(&addr, 64, dev, 0, 0); } static struct inet6_dev *addrconf_add_dev(struct net_device *dev) { struct inet6_dev *idev; ASSERT_RTNL(); |
e21e8467d
|
1722 1723 |
idev = ipv6_find_idev(dev); if (!idev) |
64e724f62
|
1724 1725 1726 1727 |
return ERR_PTR(-ENOBUFS); if (idev->cnf.disable_ipv6) return ERR_PTR(-EACCES); |
1da177e4c
|
1728 1729 |
/* Add default multicast route */ |
4af04aba9
|
1730 1731 |
if (!(dev->flags & IFF_LOOPBACK)) addrconf_add_mroute(dev); |
1da177e4c
|
1732 1733 1734 1735 1736 |
/* Add link local route */ addrconf_add_lroute(dev); return idev; } |
e6bff995f
|
1737 |
void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4c
|
1738 1739 1740 1741 1742 |
{ struct prefix_info *pinfo; __u32 valid_lft; __u32 prefered_lft; int addr_type; |
1da177e4c
|
1743 |
struct inet6_dev *in6_dev; |
56d417b12
|
1744 |
struct net *net = dev_net(dev); |
1da177e4c
|
1745 1746 |
pinfo = (struct prefix_info *) opt; |
1ab1457c4
|
1747 |
|
1da177e4c
|
1748 1749 1750 1751 1752 |
if (len < sizeof(struct prefix_info)) { ADBG(("addrconf: prefix option too short ")); return; } |
1ab1457c4
|
1753 |
|
1da177e4c
|
1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 |
/* * Validation checks ([ADDRCONF], page 19) */ addr_type = ipv6_addr_type(&pinfo->prefix); if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) return; valid_lft = ntohl(pinfo->valid); prefered_lft = ntohl(pinfo->prefered); if (prefered_lft > valid_lft) { if (net_ratelimit()) printk(KERN_WARNING "addrconf: prefix option has invalid lifetime "); return; } in6_dev = in6_dev_get(dev); if (in6_dev == NULL) { if (net_ratelimit()) printk(KERN_DEBUG "addrconf: device %s not configured ", dev->name); return; } /* * Two things going on here: * 1) Add routes for on-link prefixes * 2) Configure prefixes with the auto flag set */ |
4bed72e4f
|
1787 1788 1789 |
if (pinfo->onlink) { struct rt6_info *rt; unsigned long rt_expires; |
6f704992d
|
1790 1791 1792 1793 1794 |
/* Avoid arithmetic overflow. Really, we could * save rt_expires in seconds, likely valid_lft, * but it would require division in fib gc, that it * not good. */ |
4bed72e4f
|
1795 1796 1797 1798 |
if (HZ > USER_HZ) rt_expires = addrconf_timeout_fixup(valid_lft, HZ); else rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); |
3dd4bc68f
|
1799 |
|
4bed72e4f
|
1800 1801 |
if (addrconf_finite_timeout(rt_expires)) rt_expires *= HZ; |
1da177e4c
|
1802 |
|
14ef37b6d
|
1803 1804 1805 1806 1807 |
rt = addrconf_get_prefix_route(&pinfo->prefix, pinfo->prefix_len, dev, RTF_ADDRCONF | RTF_PREFIX_RT, RTF_GATEWAY | RTF_DEFAULT); |
1da177e4c
|
1808 |
|
14ef37b6d
|
1809 |
if (rt) { |
6f704992d
|
1810 1811 1812 1813 |
/* Autoconf prefix route */ if (valid_lft == 0) { ip6_del_rt(rt); rt = NULL; |
4bed72e4f
|
1814 |
} else if (addrconf_finite_timeout(rt_expires)) { |
6f704992d
|
1815 |
/* not infinity */ |
d19185428
|
1816 |
rt->dst.expires = jiffies + rt_expires; |
6f704992d
|
1817 1818 1819 |
rt->rt6i_flags |= RTF_EXPIRES; } else { rt->rt6i_flags &= ~RTF_EXPIRES; |
d19185428
|
1820 |
rt->dst.expires = 0; |
1da177e4c
|
1821 1822 |
} } else if (valid_lft) { |
6f704992d
|
1823 |
clock_t expires = 0; |
4bed72e4f
|
1824 1825 |
int flags = RTF_ADDRCONF | RTF_PREFIX_RT; if (addrconf_finite_timeout(rt_expires)) { |
6f704992d
|
1826 1827 1828 1829 |
/* not infinity */ flags |= RTF_EXPIRES; expires = jiffies_to_clock_t(rt_expires); } |
1da177e4c
|
1830 |
addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992d
|
1831 |
dev, expires, flags); |
1da177e4c
|
1832 1833 |
} if (rt) |
d8d1f30b9
|
1834 |
dst_release(&rt->dst); |
1da177e4c
|
1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 |
} /* Try to figure out our local address for this prefix */ if (pinfo->autoconf && in6_dev->cnf.autoconf) { struct inet6_ifaddr * ifp; struct in6_addr addr; int create = 0, update_lft = 0; if (pinfo->prefix_len == 64) { memcpy(&addr, &pinfo->prefix, 8); if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { in6_dev_put(in6_dev); return; } goto ok; } if (net_ratelimit()) printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d ", pinfo->prefix_len); in6_dev_put(in6_dev); return; ok: |
53b7997fd
|
1861 |
ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4c
|
1862 1863 1864 |
if (ifp == NULL && valid_lft) { int max_addresses = in6_dev->cnf.max_addresses; |
95c385b4d
|
1865 1866 1867 1868 |
u32 addr_flags = 0; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD if (in6_dev->cnf.optimistic_dad && |
e6bff995f
|
1869 |
!net->ipv6.devconf_all->forwarding && sllao) |
95c385b4d
|
1870 1871 |
addr_flags = IFA_F_OPTIMISTIC; #endif |
1da177e4c
|
1872 1873 1874 1875 1876 1877 1878 |
/* Do not allow to create too much of autoconfigured * addresses; this would be too easy way to crash kernel. */ if (!max_addresses || ipv6_count_addresses(in6_dev) < max_addresses) ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, |
95c385b4d
|
1879 1880 |
addr_type&IPV6_ADDR_SCOPE_MASK, addr_flags); |
1da177e4c
|
1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 |
if (!ifp || IS_ERR(ifp)) { in6_dev_put(in6_dev); return; } update_lft = create = 1; ifp->cstamp = jiffies; addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); } if (ifp) { int flags; unsigned long now; #ifdef CONFIG_IPV6_PRIVACY struct inet6_ifaddr *ift; #endif u32 stored_lft; /* update lifetime (RFC2462 5.5.3 e) */ spin_lock(&ifp->lock); now = jiffies; if (ifp->valid_lft > (now - ifp->tstamp) / HZ) stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; else stored_lft = 0; if (!update_lft && stored_lft) { if (valid_lft > MIN_VALID_LIFETIME || valid_lft > stored_lft) update_lft = 1; else if (stored_lft <= MIN_VALID_LIFETIME) { /* valid_lft <= stored_lft is always true */ |
a1ed05263
|
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 |
/* * RFC 4862 Section 5.5.3e: * "Note that the preferred lifetime of * the corresponding address is always * reset to the Preferred Lifetime in * the received Prefix Information * option, regardless of whether the * valid lifetime is also reset or * ignored." * * So if the preferred lifetime in * this advertisement is different * than what we have stored, but the * valid lifetime is invalid, just * reset prefered_lft. * * We must set the valid lifetime * to the stored lifetime since we'll * be updating the timestamp below, * else we'll set it back to the |
25985edce
|
1933 |
* minimum. |
a1ed05263
|
1934 1935 1936 1937 1938 |
*/ if (prefered_lft != ifp->prefered_lft) { valid_lft = stored_lft; update_lft = 1; } |
1da177e4c
|
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 |
} else { valid_lft = MIN_VALID_LIFETIME; if (valid_lft < prefered_lft) prefered_lft = valid_lft; update_lft = 1; } } if (update_lft) { ifp->valid_lft = valid_lft; ifp->prefered_lft = prefered_lft; ifp->tstamp = now; flags = ifp->flags; ifp->flags &= ~IFA_F_DEPRECATED; spin_unlock(&ifp->lock); if (!(flags&IFA_F_TENTATIVE)) ipv6_ifa_notify(0, ifp); } else spin_unlock(&ifp->lock); #ifdef CONFIG_IPV6_PRIVACY read_lock_bh(&in6_dev->lock); /* update all temporary addresses in the list */ |
76f793e3a
|
1963 1964 1965 |
list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) { int age, max_valid, max_prefered; |
c6fbfac2e
|
1966 1967 |
if (ifp != ift->ifpub) continue; |
76f793e3a
|
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 |
/* * RFC 4941 section 3.3: * If a received option will extend the lifetime * of a public address, the lifetimes of * temporary addresses should be extended, * subject to the overall constraint that no * temporary addresses should ever remain * "valid" or "preferred" for a time longer than * (TEMP_VALID_LIFETIME) or * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), * respectively. */ age = (now - ift->cstamp) / HZ; max_valid = in6_dev->cnf.temp_valid_lft - age; if (max_valid < 0) max_valid = 0; max_prefered = in6_dev->cnf.temp_prefered_lft - in6_dev->cnf.max_desync_factor - age; if (max_prefered < 0) max_prefered = 0; if (valid_lft > max_valid) valid_lft = max_valid; if (prefered_lft > max_prefered) prefered_lft = max_prefered; |
1da177e4c
|
1996 1997 |
spin_lock(&ift->lock); flags = ift->flags; |
76f793e3a
|
1998 1999 2000 2001 2002 |
ift->valid_lft = valid_lft; ift->prefered_lft = prefered_lft; ift->tstamp = now; if (prefered_lft > 0) ift->flags &= ~IFA_F_DEPRECATED; |
1da177e4c
|
2003 2004 2005 2006 |
spin_unlock(&ift->lock); if (!(flags&IFA_F_TENTATIVE)) ipv6_ifa_notify(0, ift); } |
aed65501e
|
2007 |
if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
1da177e4c
|
2008 |
/* |
76f793e3a
|
2009 2010 2011 2012 2013 |
* When a new public address is created as * described in [ADDRCONF], also create a new * temporary address. Also create a temporary * address if it's enabled but no temporary * address currently exists. |
1da177e4c
|
2014 |
*/ |
1ab1457c4
|
2015 |
read_unlock_bh(&in6_dev->lock); |
1da177e4c
|
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 |
ipv6_create_tempaddr(ifp, NULL); } else { read_unlock_bh(&in6_dev->lock); } #endif in6_ifa_put(ifp); addrconf_verify(0); } } inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); in6_dev_put(in6_dev); } /* * Set destination address. * Special case for SIT interfaces where we create a new "virtual" * device. */ |
af2849377
|
2034 |
int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4c
|
2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 |
{ struct in6_ifreq ireq; struct net_device *dev; int err = -EINVAL; rtnl_lock(); err = -EFAULT; if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) goto err_exit; |
af2849377
|
2045 |
dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4c
|
2046 2047 2048 2049 |
err = -ENODEV; if (dev == NULL) goto err_exit; |
0be669bb3
|
2050 |
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4c
|
2051 |
if (dev->type == ARPHRD_SIT) { |
5bc3eb7e2
|
2052 |
const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4c
|
2053 |
struct ifreq ifr; |
1da177e4c
|
2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 |
struct ip_tunnel_parm p; err = -EADDRNOTAVAIL; if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) goto err_exit; memset(&p, 0, sizeof(p)); p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; p.iph.saddr = 0; p.iph.version = 4; p.iph.ihl = 5; p.iph.protocol = IPPROTO_IPV6; p.iph.ttl = 64; |
d20b3109e
|
2067 |
ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4c
|
2068 |
|
5bc3eb7e2
|
2069 2070 2071 2072 2073 2074 2075 2076 |
if (ops->ndo_do_ioctl) { mm_segment_t oldfs = get_fs(); set_fs(KERNEL_DS); err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); set_fs(oldfs); } else err = -EOPNOTSUPP; |
1da177e4c
|
2077 2078 2079 |
if (err == 0) { err = -ENOBUFS; |
af2849377
|
2080 2081 |
dev = __dev_get_by_name(net, p.name); if (!dev) |
1da177e4c
|
2082 2083 2084 2085 |
goto err_exit; err = dev_open(dev); } } |
0be669bb3
|
2086 |
#endif |
1da177e4c
|
2087 2088 2089 2090 2091 2092 2093 2094 2095 |
err_exit: rtnl_unlock(); return err; } /* * Manual configuration of address on an interface */ |
b71d1d426
|
2096 |
static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7b
|
2097 |
unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af2849377
|
2098 |
__u32 valid_lft) |
1da177e4c
|
2099 2100 2101 2102 2103 |
{ struct inet6_ifaddr *ifp; struct inet6_dev *idev; struct net_device *dev; int scope; |
6f704992d
|
2104 2105 |
u32 flags; clock_t expires; |
4bed72e4f
|
2106 |
unsigned long timeout; |
1da177e4c
|
2107 2108 |
ASSERT_RTNL(); |
1ab1457c4
|
2109 |
|
24ef0da7b
|
2110 2111 |
if (plen > 128) return -EINVAL; |
0778769d3
|
2112 2113 2114 |
/* check the lifetime */ if (!valid_lft || prefered_lft > valid_lft) return -EINVAL; |
af2849377
|
2115 2116 |
dev = __dev_get_by_index(net, ifindex); if (!dev) |
1da177e4c
|
2117 |
return -ENODEV; |
1ab1457c4
|
2118 |
|
64e724f62
|
2119 2120 2121 |
idev = addrconf_add_dev(dev); if (IS_ERR(idev)) return PTR_ERR(idev); |
1da177e4c
|
2122 2123 |
scope = ipv6_addr_scope(pfx); |
4bed72e4f
|
2124 2125 2126 2127 |
timeout = addrconf_timeout_fixup(valid_lft, HZ); if (addrconf_finite_timeout(timeout)) { expires = jiffies_to_clock_t(timeout * HZ); valid_lft = timeout; |
6f704992d
|
2128 |
flags = RTF_EXPIRES; |
4bed72e4f
|
2129 2130 2131 2132 |
} else { expires = 0; flags = 0; ifa_flags |= IFA_F_PERMANENT; |
6f704992d
|
2133 |
} |
0778769d3
|
2134 |
|
4bed72e4f
|
2135 2136 2137 2138 2139 2140 |
timeout = addrconf_timeout_fixup(prefered_lft, HZ); if (addrconf_finite_timeout(timeout)) { if (timeout == 0) ifa_flags |= IFA_F_DEPRECATED; prefered_lft = timeout; } |
0778769d3
|
2141 2142 |
ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); |
1da177e4c
|
2143 |
if (!IS_ERR(ifp)) { |
06aebfb7f
|
2144 |
spin_lock_bh(&ifp->lock); |
0778769d3
|
2145 2146 2147 |
ifp->valid_lft = valid_lft; ifp->prefered_lft = prefered_lft; ifp->tstamp = jiffies; |
06aebfb7f
|
2148 |
spin_unlock_bh(&ifp->lock); |
0778769d3
|
2149 |
|
46d480468
|
2150 |
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992d
|
2151 |
expires, flags); |
95c385b4d
|
2152 2153 2154 2155 2156 |
/* * Note that section 3.1 of RFC 4429 indicates * that the Optimistic flag should not be set for * manually configured addresses */ |
1da177e4c
|
2157 2158 |
addrconf_dad_start(ifp, 0); in6_ifa_put(ifp); |
0778769d3
|
2159 |
addrconf_verify(0); |
1da177e4c
|
2160 2161 2162 2163 2164 |
return 0; } return PTR_ERR(ifp); } |
b71d1d426
|
2165 |
static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7b
|
2166 |
unsigned int plen) |
1da177e4c
|
2167 2168 2169 2170 |
{ struct inet6_ifaddr *ifp; struct inet6_dev *idev; struct net_device *dev; |
1ab1457c4
|
2171 |
|
24ef0da7b
|
2172 2173 |
if (plen > 128) return -EINVAL; |
af2849377
|
2174 2175 |
dev = __dev_get_by_index(net, ifindex); if (!dev) |
1da177e4c
|
2176 2177 2178 2179 2180 2181 |
return -ENODEV; if ((idev = __in6_dev_get(dev)) == NULL) return -ENXIO; read_lock_bh(&idev->lock); |
502a2ffd7
|
2182 |
list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4c
|
2183 2184 2185 2186 |
if (ifp->prefix_len == plen && ipv6_addr_equal(pfx, &ifp->addr)) { in6_ifa_hold(ifp); read_unlock_bh(&idev->lock); |
1ab1457c4
|
2187 |
|
1da177e4c
|
2188 2189 2190 2191 2192 |
ipv6_del_addr(ifp); /* If the last address is deleted administratively, disable IPv6 on this interface. */ |
502a2ffd7
|
2193 |
if (list_empty(&idev->addr_list)) |
1da177e4c
|
2194 2195 2196 2197 2198 2199 2200 |
addrconf_ifdown(idev->dev, 1); return 0; } } read_unlock_bh(&idev->lock); return -EADDRNOTAVAIL; } |
af2849377
|
2201 |
int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4c
|
2202 2203 2204 |
{ struct in6_ifreq ireq; int err; |
1ab1457c4
|
2205 |
|
1da177e4c
|
2206 2207 |
if (!capable(CAP_NET_ADMIN)) return -EPERM; |
1ab1457c4
|
2208 |
|
1da177e4c
|
2209 2210 2211 2212 |
if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) return -EFAULT; rtnl_lock(); |
af2849377
|
2213 2214 2215 |
err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen, IFA_F_PERMANENT, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4c
|
2216 2217 2218 |
rtnl_unlock(); return err; } |
af2849377
|
2219 |
int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4c
|
2220 2221 2222 |
{ struct in6_ifreq ireq; int err; |
1ab1457c4
|
2223 |
|
1da177e4c
|
2224 2225 2226 2227 2228 2229 2230 |
if (!capable(CAP_NET_ADMIN)) return -EPERM; if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) return -EFAULT; rtnl_lock(); |
af2849377
|
2231 2232 |
err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); |
1da177e4c
|
2233 2234 2235 |
rtnl_unlock(); return err; } |
b5f348e5a
|
2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 |
static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int plen, int scope) { struct inet6_ifaddr *ifp; ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); if (!IS_ERR(ifp)) { spin_lock_bh(&ifp->lock); ifp->flags &= ~IFA_F_TENTATIVE; spin_unlock_bh(&ifp->lock); ipv6_ifa_notify(RTM_NEWADDR, ifp); in6_ifa_put(ifp); } } |
0be669bb3
|
2250 |
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4c
|
2251 2252 |
static void sit_add_v4_addrs(struct inet6_dev *idev) { |
1da177e4c
|
2253 2254 |
struct in6_addr addr; struct net_device *dev; |
c346dca10
|
2255 |
struct net *net = dev_net(idev->dev); |
1da177e4c
|
2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 |
int scope; ASSERT_RTNL(); memset(&addr, 0, sizeof(struct in6_addr)); memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); if (idev->dev->flags&IFF_POINTOPOINT) { addr.s6_addr32[0] = htonl(0xfe800000); scope = IFA_LINK; } else { scope = IPV6_ADDR_COMPATv4; } if (addr.s6_addr32[3]) { |
b5f348e5a
|
2271 |
add_addr(idev, &addr, 128, scope); |
1da177e4c
|
2272 2273 |
return; } |
6fda73500
|
2274 |
for_each_netdev(net, dev) { |
e5ed63991
|
2275 |
struct in_device * in_dev = __in_dev_get_rtnl(dev); |
1da177e4c
|
2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 |
if (in_dev && (dev->flags & IFF_UP)) { struct in_ifaddr * ifa; int flag = scope; for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { int plen; addr.s6_addr32[3] = ifa->ifa_local; if (ifa->ifa_scope == RT_SCOPE_LINK) continue; if (ifa->ifa_scope >= RT_SCOPE_HOST) { if (idev->dev->flags&IFF_POINTOPOINT) continue; flag |= IFA_HOST; } if (idev->dev->flags&IFF_POINTOPOINT) plen = 64; else plen = 96; |
b5f348e5a
|
2297 |
add_addr(idev, &addr, plen, flag); |
1da177e4c
|
2298 2299 |
} } |
1ab1457c4
|
2300 |
} |
1da177e4c
|
2301 |
} |
0be669bb3
|
2302 |
#endif |
1da177e4c
|
2303 2304 2305 2306 |
static void init_loopback(struct net_device *dev) { struct inet6_dev *idev; |
1da177e4c
|
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 |
/* ::1 */ ASSERT_RTNL(); if ((idev = ipv6_find_idev(dev)) == NULL) { printk(KERN_DEBUG "init loopback: add_dev failed "); return; } |
b5f348e5a
|
2317 |
add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
1da177e4c
|
2318 |
} |
b71d1d426
|
2319 |
static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4c
|
2320 2321 |
{ struct inet6_ifaddr * ifp; |
95c385b4d
|
2322 2323 2324 2325 |
u32 addr_flags = IFA_F_PERMANENT; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD if (idev->cnf.optimistic_dad && |
702beb87d
|
2326 |
!dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4d
|
2327 2328 |
addr_flags |= IFA_F_OPTIMISTIC; #endif |
1da177e4c
|
2329 |
|
95c385b4d
|
2330 2331 |
ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); |
1da177e4c
|
2332 |
if (!IS_ERR(ifp)) { |
46d480468
|
2333 |
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
1da177e4c
|
2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 |
addrconf_dad_start(ifp, 0); in6_ifa_put(ifp); } } static void addrconf_dev_config(struct net_device *dev) { struct in6_addr addr; struct inet6_dev * idev; ASSERT_RTNL(); |
74235a25c
|
2345 2346 2347 2348 2349 2350 2351 2352 |
if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_FDDI) && (dev->type != ARPHRD_IEEE802_TR) && (dev->type != ARPHRD_ARCNET) && (dev->type != ARPHRD_INFINIBAND)) { /* Alas, we support only Ethernet autoconfiguration. */ return; } |
1da177e4c
|
2353 |
idev = addrconf_add_dev(dev); |
64e724f62
|
2354 |
if (IS_ERR(idev)) |
1da177e4c
|
2355 2356 2357 2358 2359 2360 2361 2362 |
return; memset(&addr, 0, sizeof(struct in6_addr)); addr.s6_addr32[0] = htonl(0xFE800000); if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) addrconf_add_linklocal(idev, &addr); } |
0be669bb3
|
2363 |
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4c
|
2364 2365 2366 2367 2368 |
static void addrconf_sit_config(struct net_device *dev) { struct inet6_dev *idev; ASSERT_RTNL(); |
1ab1457c4
|
2369 2370 2371 |
/* * Configure the tunnel with one of our IPv4 * addresses... we should configure all of |
1da177e4c
|
2372 2373 2374 2375 2376 2377 2378 2379 |
* our v4 addrs in the tunnel */ if ((idev = ipv6_find_idev(dev)) == NULL) { printk(KERN_DEBUG "init sit: add_dev failed "); return; } |
c7dc89c0a
|
2380 2381 2382 2383 2384 2385 2386 2387 2388 |
if (dev->priv_flags & IFF_ISATAP) { struct in6_addr addr; ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); addrconf_prefix_route(&addr, 64, dev, 0, 0); if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) addrconf_add_linklocal(idev, &addr); return; } |
1da177e4c
|
2389 2390 2391 2392 2393 2394 2395 2396 |
sit_add_v4_addrs(idev); if (dev->flags&IFF_POINTOPOINT) { addrconf_add_mroute(dev); addrconf_add_lroute(dev); } else sit_route_add(dev); } |
0be669bb3
|
2397 |
#endif |
1da177e4c
|
2398 |
|
aee80b54b
|
2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 |
#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) static void addrconf_gre_config(struct net_device *dev) { struct inet6_dev *idev; struct in6_addr addr; pr_info("ipv6: addrconf_gre_config(%s) ", dev->name); ASSERT_RTNL(); if ((idev = ipv6_find_idev(dev)) == NULL) { printk(KERN_DEBUG "init gre: add_dev failed "); return; } ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); addrconf_prefix_route(&addr, 64, dev, 0, 0); if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) addrconf_add_linklocal(idev, &addr); } #endif |
1da177e4c
|
2423 2424 2425 2426 |
static inline int ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) { struct in6_addr lladdr; |
95c385b4d
|
2427 |
if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4c
|
2428 2429 2430 2431 2432 2433 2434 2435 2436 |
addrconf_add_linklocal(idev, &lladdr); return 0; } return -1; } static void ip6_tnl_add_linklocal(struct inet6_dev *idev) { struct net_device *link_dev; |
c346dca10
|
2437 |
struct net *net = dev_net(idev->dev); |
1da177e4c
|
2438 2439 2440 |
/* first try to inherit the link-local address from the link device */ if (idev->dev->iflink && |
6fda73500
|
2441 |
(link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4c
|
2442 2443 2444 2445 |
if (!ipv6_inherit_linklocal(idev, link_dev)) return; } /* then try to inherit it from any device */ |
6fda73500
|
2446 |
for_each_netdev(net, link_dev) { |
1da177e4c
|
2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 |
if (!ipv6_inherit_linklocal(idev, link_dev)) return; } printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed "); } /* * Autoconfigure tunnel with a link-local address so routing protocols, * DHCPv6, MLD etc. can be run over the virtual link */ static void addrconf_ip6_tnl_config(struct net_device *dev) { struct inet6_dev *idev; ASSERT_RTNL(); |
e21e8467d
|
2464 |
idev = addrconf_add_dev(dev); |
64e724f62
|
2465 |
if (IS_ERR(idev)) { |
1da177e4c
|
2466 2467 2468 2469 2470 |
printk(KERN_DEBUG "init ip6-ip6: add_dev failed "); return; } ip6_tnl_add_linklocal(idev); |
1da177e4c
|
2471 |
} |
1ab1457c4
|
2472 |
static int addrconf_notify(struct notifier_block *this, unsigned long event, |
1da177e4c
|
2473 2474 2475 |
void * data) { struct net_device *dev = (struct net_device *) data; |
74235a25c
|
2476 |
struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bddd
|
2477 |
int run_pending = 0; |
b217d616a
|
2478 |
int err; |
1da177e4c
|
2479 |
|
e21e8467d
|
2480 |
switch (event) { |
45ba9dd20
|
2481 |
case NETDEV_REGISTER: |
74235a25c
|
2482 |
if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd20
|
2483 2484 |
idev = ipv6_add_dev(dev); if (!idev) |
b217d616a
|
2485 |
return notifier_from_errno(-ENOMEM); |
45ba9dd20
|
2486 2487 |
} break; |
bcdd553fd
|
2488 |
|
1da177e4c
|
2489 |
case NETDEV_UP: |
3c21edbd1
|
2490 |
case NETDEV_CHANGE: |
c2edacf80
|
2491 2492 |
if (dev->flags & IFF_SLAVE) break; |
3c21edbd1
|
2493 |
if (event == NETDEV_UP) { |
f24e3d658
|
2494 |
if (!addrconf_qdisc_ok(dev)) { |
3c21edbd1
|
2495 2496 2497 2498 2499 2500 2501 2502 |
/* device is not ready yet. */ printk(KERN_INFO "ADDRCONF(NETDEV_UP): %s: " "link is not ready ", dev->name); break; } |
990810493
|
2503 |
|
d31c7b8fa
|
2504 2505 |
if (!idev && dev->mtu >= IPV6_MIN_MTU) idev = ipv6_add_dev(dev); |
e3ec6cfc2
|
2506 |
if (idev) { |
990810493
|
2507 |
idev->if_flags |= IF_READY; |
e3ec6cfc2
|
2508 2509 |
run_pending = 1; } |
3c21edbd1
|
2510 |
} else { |
f24e3d658
|
2511 |
if (!addrconf_qdisc_ok(dev)) { |
3c21edbd1
|
2512 2513 2514 2515 2516 |
/* device is still not ready. */ break; } if (idev) { |
bcdd553fd
|
2517 |
if (idev->if_flags & IF_READY) |
3c21edbd1
|
2518 2519 |
/* device is already configured. */ break; |
3c21edbd1
|
2520 2521 2522 2523 2524 2525 2526 2527 |
idev->if_flags |= IF_READY; } printk(KERN_INFO "ADDRCONF(NETDEV_CHANGE): %s: " "link becomes ready ", dev->name); |
c5e33bddd
|
2528 |
run_pending = 1; |
3c21edbd1
|
2529 |
} |
e21e8467d
|
2530 |
switch (dev->type) { |
0be669bb3
|
2531 |
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE) |
1da177e4c
|
2532 2533 2534 |
case ARPHRD_SIT: addrconf_sit_config(dev); break; |
0be669bb3
|
2535 |
#endif |
aee80b54b
|
2536 2537 2538 2539 2540 |
#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE) case ARPHRD_IPGRE: addrconf_gre_config(dev); break; #endif |
1da177e4c
|
2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 |
case ARPHRD_TUNNEL6: addrconf_ip6_tnl_config(dev); break; case ARPHRD_LOOPBACK: init_loopback(dev); break; default: addrconf_dev_config(dev); break; |
3ff50b799
|
2551 |
} |
bcdd553fd
|
2552 |
|
1da177e4c
|
2553 |
if (idev) { |
c5e33bddd
|
2554 2555 |
if (run_pending) addrconf_dad_run(idev); |
bcdd553fd
|
2556 2557 2558 2559 |
/* * If the MTU changed during the interface down, * when the interface up, the changed MTU must be * reflected in the idev as well as routers. |
1da177e4c
|
2560 |
*/ |
bcdd553fd
|
2561 2562 |
if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4c
|
2563 2564 2565 2566 2567 |
rt6_mtu_change(dev, dev->mtu); idev->cnf.mtu6 = dev->mtu; } idev->tstamp = jiffies; inet6_ifinfo_notify(RTM_NEWLINK, idev); |
bcdd553fd
|
2568 2569 2570 2571 |
/* * If the changed mtu during down is lower than * IPV6_MIN_MTU stop IPv6 on this interface. |
1da177e4c
|
2572 2573 |
*/ if (dev->mtu < IPV6_MIN_MTU) |
bcdd553fd
|
2574 |
addrconf_ifdown(dev, 1); |
1da177e4c
|
2575 2576 2577 2578 |
} break; case NETDEV_CHANGEMTU: |
d31c7b8fa
|
2579 |
if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4c
|
2580 2581 2582 2583 |
rt6_mtu_change(dev, dev->mtu); idev->cnf.mtu6 = dev->mtu; break; } |
d31c7b8fa
|
2584 2585 2586 2587 2588 |
if (!idev && dev->mtu >= IPV6_MIN_MTU) { idev = ipv6_add_dev(dev); if (idev) break; } |
bcdd553fd
|
2589 2590 2591 2592 |
/* * MTU falled under IPV6_MIN_MTU. * Stop IPv6 on this interface. */ |
1da177e4c
|
2593 2594 2595 2596 2597 2598 2599 2600 |
case NETDEV_DOWN: case NETDEV_UNREGISTER: /* * Remove all addresses from this interface. */ addrconf_ifdown(dev, event != NETDEV_DOWN); break; |
3c21edbd1
|
2601 |
|
1da177e4c
|
2602 |
case NETDEV_CHANGENAME: |
1da177e4c
|
2603 |
if (idev) { |
5632c5152
|
2604 |
snmp6_unregister_dev(idev); |
408c4768c
|
2605 |
addrconf_sysctl_unregister(idev); |
f52295a9c
|
2606 |
addrconf_sysctl_register(idev); |
b217d616a
|
2607 2608 2609 |
err = snmp6_register_dev(idev); if (err) return notifier_from_errno(err); |
5632c5152
|
2610 |
} |
1da177e4c
|
2611 |
break; |
bcdd553fd
|
2612 |
|
93d9b7d7a
|
2613 2614 2615 |
case NETDEV_PRE_TYPE_CHANGE: case NETDEV_POST_TYPE_CHANGE: addrconf_type_change(dev, event); |
75c78500d
|
2616 |
break; |
3ff50b799
|
2617 |
} |
1da177e4c
|
2618 2619 2620 2621 2622 2623 2624 2625 2626 |
return NOTIFY_OK; } /* * addrconf module should be notified of a device going up */ static struct notifier_block ipv6_dev_notf = { .notifier_call = addrconf_notify, |
1da177e4c
|
2627 |
}; |
93d9b7d7a
|
2628 |
static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500d
|
2629 2630 2631 2632 2633 |
{ struct inet6_dev *idev; ASSERT_RTNL(); idev = __in6_dev_get(dev); |
93d9b7d7a
|
2634 |
if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500d
|
2635 |
ipv6_mc_remap(idev); |
93d9b7d7a
|
2636 |
else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500d
|
2637 2638 |
ipv6_mc_unmap(idev); } |
1da177e4c
|
2639 2640 |
static int addrconf_ifdown(struct net_device *dev, int how) { |
c346dca10
|
2641 |
struct net *net = dev_net(dev); |
502a2ffd7
|
2642 2643 |
struct inet6_dev *idev; struct inet6_ifaddr *ifa; |
73a8bd74e
|
2644 |
int state, i; |
1da177e4c
|
2645 2646 |
ASSERT_RTNL(); |
73a8bd74e
|
2647 2648 |
rt6_ifdown(net, dev); neigh_ifdown(&nd_tbl, dev); |
1da177e4c
|
2649 2650 2651 2652 |
idev = __in6_dev_get(dev); if (idev == NULL) return -ENODEV; |
bcdd553fd
|
2653 2654 2655 |
/* * Step 1: remove reference to ipv6 device from parent device. * Do not dev_put! |
1da177e4c
|
2656 |
*/ |
439e23857
|
2657 |
if (how) { |
1da177e4c
|
2658 |
idev->dead = 1; |
8814c4b53
|
2659 2660 |
/* protected by rtnl_lock */ |
a9b3cd7f3
|
2661 |
RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4c
|
2662 2663 2664 2665 2666 |
/* Step 1.5: remove snmp6 entry */ snmp6_unregister_dev(idev); } |
73a8bd74e
|
2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 |
/* Step 2: clear hash table */ for (i = 0; i < IN6_ADDR_HSIZE; i++) { struct hlist_head *h = &inet6_addr_lst[i]; struct hlist_node *n; spin_lock_bh(&addrconf_hash_lock); restart: hlist_for_each_entry_rcu(ifa, n, h, addr_lst) { if (ifa->idev == idev) { hlist_del_init_rcu(&ifa->addr_lst); addrconf_del_timer(ifa); goto restart; } } spin_unlock_bh(&addrconf_hash_lock); } |
1da177e4c
|
2683 |
write_lock_bh(&idev->lock); |
bcdd553fd
|
2684 |
/* Step 2: clear flags for stateless addrconf */ |
439e23857
|
2685 |
if (!how) |
3c21edbd1
|
2686 |
idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4c
|
2687 |
|
1da177e4c
|
2688 |
#ifdef CONFIG_IPV6_PRIVACY |
439e23857
|
2689 |
if (how && del_timer(&idev->regen_timer)) |
1da177e4c
|
2690 |
in6_dev_put(idev); |
bcdd553fd
|
2691 |
/* Step 3: clear tempaddr list */ |
372e6c8f1
|
2692 2693 2694 2695 |
while (!list_empty(&idev->tempaddr_list)) { ifa = list_first_entry(&idev->tempaddr_list, struct inet6_ifaddr, tmp_list); list_del(&ifa->tmp_list); |
1da177e4c
|
2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 |
write_unlock_bh(&idev->lock); spin_lock_bh(&ifa->lock); if (ifa->ifpub) { in6_ifa_put(ifa->ifpub); ifa->ifpub = NULL; } spin_unlock_bh(&ifa->lock); in6_ifa_put(ifa); write_lock_bh(&idev->lock); } #endif |
8f37ada5b
|
2708 |
|
502a2ffd7
|
2709 2710 2711 |
while (!list_empty(&idev->addr_list)) { ifa = list_first_entry(&idev->addr_list, struct inet6_ifaddr, if_list); |
84e8b803f
|
2712 |
addrconf_del_timer(ifa); |
73a8bd74e
|
2713 |
list_del(&ifa->if_list); |
84e8b803f
|
2714 |
|
73a8bd74e
|
2715 |
write_unlock_bh(&idev->lock); |
84e8b803f
|
2716 |
|
73a8bd74e
|
2717 2718 2719 2720 |
spin_lock_bh(&ifa->state_lock); state = ifa->state; ifa->state = INET6_IFADDR_STATE_DEAD; spin_unlock_bh(&ifa->state_lock); |
9d82ca98f
|
2721 |
|
73a8bd74e
|
2722 2723 2724 |
if (state != INET6_IFADDR_STATE_DEAD) { __ipv6_ifa_notify(RTM_DELADDR, ifa); atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); |
27bdb2abc
|
2725 |
} |
73a8bd74e
|
2726 |
in6_ifa_put(ifa); |
8f37ada5b
|
2727 |
|
73a8bd74e
|
2728 2729 |
write_lock_bh(&idev->lock); } |
8f37ada5b
|
2730 |
|
1da177e4c
|
2731 2732 2733 |
write_unlock_bh(&idev->lock); /* Step 5: Discard multicast list */ |
439e23857
|
2734 |
if (how) |
1da177e4c
|
2735 2736 2737 |
ipv6_mc_destroy_dev(idev); else ipv6_mc_down(idev); |
1da177e4c
|
2738 |
idev->tstamp = jiffies; |
1ab1457c4
|
2739 |
|
bcdd553fd
|
2740 |
/* Last: Shot the device (if unregistered) */ |
439e23857
|
2741 |
if (how) { |
408c4768c
|
2742 |
addrconf_sysctl_unregister(idev); |
1da177e4c
|
2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 |
neigh_parms_release(&nd_tbl, idev->nd_parms); neigh_ifdown(&nd_tbl, dev); in6_dev_put(idev); } return 0; } static void addrconf_rs_timer(unsigned long data) { struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
5b2a19539
|
2753 |
struct inet6_dev *idev = ifp->idev; |
1da177e4c
|
2754 |
|
5b2a19539
|
2755 2756 |
read_lock(&idev->lock); if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4c
|
2757 |
goto out; |
5b2a19539
|
2758 2759 2760 2761 2762 |
if (idev->cnf.forwarding) goto out; /* Announcement received after solicitation was sent */ if (idev->if_flags & IF_RA_RCVD) |
1da177e4c
|
2763 |
goto out; |
1da177e4c
|
2764 2765 |
spin_lock(&ifp->lock); |
5b2a19539
|
2766 |
if (ifp->probes++ < idev->cnf.rtr_solicits) { |
1da177e4c
|
2767 2768 |
/* The wait after the last probe can be shorter */ addrconf_mod_timer(ifp, AC_RS, |
5b2a19539
|
2769 2770 2771 |
(ifp->probes == idev->cnf.rtr_solicits) ? idev->cnf.rtr_solicit_delay : idev->cnf.rtr_solicit_interval); |
1da177e4c
|
2772 |
spin_unlock(&ifp->lock); |
5b2a19539
|
2773 |
ndisc_send_rs(idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4c
|
2774 2775 2776 2777 2778 2779 2780 2781 |
} else { spin_unlock(&ifp->lock); /* * Note: we do not support deprecated "all on-link" * assumption any longer. */ printk(KERN_DEBUG "%s: no IPv6 routers present ", |
5b2a19539
|
2782 |
idev->dev->name); |
1da177e4c
|
2783 2784 2785 |
} out: |
5b2a19539
|
2786 |
read_unlock(&idev->lock); |
1da177e4c
|
2787 2788 2789 2790 2791 2792 |
in6_ifa_put(ifp); } /* * Duplicate Address Detection */ |
3c21edbd1
|
2793 2794 2795 2796 |
static void addrconf_dad_kick(struct inet6_ifaddr *ifp) { unsigned long rand_num; struct inet6_dev *idev = ifp->idev; |
95c385b4d
|
2797 2798 2799 2800 |
if (ifp->flags & IFA_F_OPTIMISTIC) rand_num = 0; else rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); |
3c21edbd1
|
2801 2802 2803 |
ifp->probes = idev->cnf.dad_transmits; addrconf_mod_timer(ifp, AC_DAD, rand_num); } |
e431b8c00
|
2804 |
static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
1da177e4c
|
2805 2806 2807 |
{ struct inet6_dev *idev = ifp->idev; struct net_device *dev = idev->dev; |
1da177e4c
|
2808 2809 |
addrconf_join_solict(dev, &ifp->addr); |
1da177e4c
|
2810 |
net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4c
|
2811 2812 |
read_lock_bh(&idev->lock); |
622ccdf10
|
2813 |
spin_lock(&ifp->lock); |
e9d3e0849
|
2814 |
if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4c
|
2815 |
goto out; |
1da177e4c
|
2816 2817 |
if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
1b34be74c
|
2818 |
idev->cnf.accept_dad < 1 || |
55ebaef1d
|
2819 2820 |
!(ifp->flags&IFA_F_TENTATIVE) || ifp->flags & IFA_F_NODAD) { |
cc411d0ba
|
2821 |
ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809fafa
|
2822 |
spin_unlock(&ifp->lock); |
1da177e4c
|
2823 2824 2825 2826 2827 |
read_unlock_bh(&idev->lock); addrconf_dad_completed(ifp); return; } |
6732badee
|
2828 |
if (!(idev->if_flags & IF_READY)) { |
21809fafa
|
2829 |
spin_unlock(&ifp->lock); |
6732badee
|
2830 |
read_unlock_bh(&idev->lock); |
3c21edbd1
|
2831 |
/* |
590a9887a
|
2832 |
* If the device is not ready: |
3c21edbd1
|
2833 2834 2835 2836 |
* - keep it tentative if it is a permanent address. * - otherwise, kill it. */ in6_ifa_hold(ifp); |
cc411d0ba
|
2837 |
addrconf_dad_stop(ifp, 0); |
6732badee
|
2838 |
return; |
3c21edbd1
|
2839 |
} |
95c385b4d
|
2840 2841 2842 2843 2844 |
/* * Optimistic nodes can start receiving * Frames right away */ |
e21e8467d
|
2845 |
if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4d
|
2846 |
ip6_ins_rt(ifp->rt); |
6732badee
|
2847 |
addrconf_dad_kick(ifp); |
1da177e4c
|
2848 |
out: |
622ccdf10
|
2849 |
spin_unlock(&ifp->lock); |
1da177e4c
|
2850 2851 2852 2853 2854 2855 2856 |
read_unlock_bh(&idev->lock); } static void addrconf_dad_timer(unsigned long data) { struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; struct inet6_dev *idev = ifp->idev; |
1da177e4c
|
2857 |
struct in6_addr mcaddr; |
f2344a131
|
2858 2859 |
if (!ifp->probes && addrconf_dad_end(ifp)) goto out; |
122e4519c
|
2860 2861 2862 |
read_lock(&idev->lock); if (idev->dead || !(idev->if_flags & IF_READY)) { read_unlock(&idev->lock); |
1da177e4c
|
2863 2864 |
goto out; } |
21809fafa
|
2865 2866 |
spin_lock(&ifp->lock); |
622ccdf10
|
2867 2868 2869 2870 2871 |
if (ifp->state == INET6_IFADDR_STATE_DEAD) { spin_unlock(&ifp->lock); read_unlock(&idev->lock); goto out; } |
1da177e4c
|
2872 2873 2874 2875 |
if (ifp->probes == 0) { /* * DAD was successful */ |
cc411d0ba
|
2876 |
ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809fafa
|
2877 |
spin_unlock(&ifp->lock); |
122e4519c
|
2878 |
read_unlock(&idev->lock); |
1da177e4c
|
2879 2880 2881 2882 2883 2884 2885 2886 |
addrconf_dad_completed(ifp); goto out; } ifp->probes--; addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); |
21809fafa
|
2887 |
spin_unlock(&ifp->lock); |
122e4519c
|
2888 |
read_unlock(&idev->lock); |
1da177e4c
|
2889 2890 |
/* send a neighbour solicitation for our addr */ |
1da177e4c
|
2891 |
addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22e
|
2892 |
ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4c
|
2893 2894 2895 2896 2897 2898 |
out: in6_ifa_put(ifp); } static void addrconf_dad_completed(struct inet6_ifaddr *ifp) { |
e21e8467d
|
2899 |
struct net_device *dev = ifp->idev->dev; |
1da177e4c
|
2900 2901 2902 2903 2904 2905 |
/* * Configure the address for reception. Now it is valid. */ ipv6_ifa_notify(RTM_NEWADDR, ifp); |
026359bc6
|
2906 2907 |
/* If added prefix is link local and we are prepared to process router advertisements, start sending router solicitations. |
1da177e4c
|
2908 |
*/ |
026359bc6
|
2909 2910 |
if (((ifp->idev->cnf.accept_ra == 1 && !ifp->idev->cnf.forwarding) || ifp->idev->cnf.accept_ra == 2) && |
1da177e4c
|
2911 2912 2913 |
ifp->idev->cnf.rtr_solicits > 0 && (dev->flags&IFF_LOOPBACK) == 0 && (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { |
1da177e4c
|
2914 2915 2916 2917 2918 |
/* * If a host as already performed a random delay * [...] as part of DAD [...] there is no need * to delay again before sending the first RS */ |
f3ee4010e
|
2919 |
ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters); |
1da177e4c
|
2920 2921 2922 2923 2924 2925 2926 2927 |
spin_lock_bh(&ifp->lock); ifp->probes = 1; ifp->idev->if_flags |= IF_RS_SENT; addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); spin_unlock_bh(&ifp->lock); } } |
e21e8467d
|
2928 2929 |
static void addrconf_dad_run(struct inet6_dev *idev) { |
c5e33bddd
|
2930 2931 2932 |
struct inet6_ifaddr *ifp; read_lock_bh(&idev->lock); |
502a2ffd7
|
2933 |
list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809fafa
|
2934 |
spin_lock(&ifp->lock); |
f2344a131
|
2935 2936 2937 |
if (ifp->flags & IFA_F_TENTATIVE && ifp->state == INET6_IFADDR_STATE_DAD) addrconf_dad_kick(ifp); |
21809fafa
|
2938 |
spin_unlock(&ifp->lock); |
c5e33bddd
|
2939 2940 2941 |
} read_unlock_bh(&idev->lock); } |
1da177e4c
|
2942 2943 |
#ifdef CONFIG_PROC_FS struct if6_iter_state { |
3c40090a0
|
2944 |
struct seq_net_private p; |
1da177e4c
|
2945 |
int bucket; |
1d5783030
|
2946 |
int offset; |
1da177e4c
|
2947 |
}; |
1d5783030
|
2948 |
static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4c
|
2949 2950 2951 |
{ struct inet6_ifaddr *ifa = NULL; struct if6_iter_state *state = seq->private; |
1218854af
|
2952 |
struct net *net = seq_file_net(seq); |
1d5783030
|
2953 |
int p = 0; |
1da177e4c
|
2954 |
|
1d5783030
|
2955 2956 2957 2958 2959 2960 2961 |
/* initial bucket if pos is 0 */ if (pos == 0) { state->bucket = 0; state->offset = 0; } for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { |
c2e21293c
|
2962 |
struct hlist_node *n; |
4f70ecca9
|
2963 |
hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket], |
1d5783030
|
2964 2965 2966 2967 2968 2969 2970 |
addr_lst) { /* sync with offset */ if (p < state->offset) { p++; continue; } state->offset++; |
c2e21293c
|
2971 2972 |
if (net_eq(dev_net(ifa->idev->dev), net)) return ifa; |
1d5783030
|
2973 2974 2975 2976 2977 |
} /* prepare for next bucket */ state->offset = 0; p = 0; |
1da177e4c
|
2978 |
} |
c2e21293c
|
2979 |
return NULL; |
1da177e4c
|
2980 |
} |
c2e21293c
|
2981 2982 |
static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) |
1da177e4c
|
2983 2984 |
{ struct if6_iter_state *state = seq->private; |
1218854af
|
2985 |
struct net *net = seq_file_net(seq); |
c2e21293c
|
2986 |
struct hlist_node *n = &ifa->addr_lst; |
1da177e4c
|
2987 |
|
1d5783030
|
2988 2989 |
hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst) { state->offset++; |
c2e21293c
|
2990 2991 |
if (net_eq(dev_net(ifa->idev->dev), net)) return ifa; |
1d5783030
|
2992 |
} |
3c40090a0
|
2993 |
|
c2e21293c
|
2994 |
while (++state->bucket < IN6_ADDR_HSIZE) { |
1d5783030
|
2995 |
state->offset = 0; |
4f70ecca9
|
2996 |
hlist_for_each_entry_rcu_bh(ifa, n, |
c2e21293c
|
2997 |
&inet6_addr_lst[state->bucket], addr_lst) { |
1d5783030
|
2998 |
state->offset++; |
c2e21293c
|
2999 3000 3001 |
if (net_eq(dev_net(ifa->idev->dev), net)) return ifa; } |
1da177e4c
|
3002 |
} |
3c40090a0
|
3003 |
|
c2e21293c
|
3004 |
return NULL; |
1da177e4c
|
3005 |
} |
1da177e4c
|
3006 |
static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca9
|
3007 |
__acquires(rcu_bh) |
1da177e4c
|
3008 |
{ |
5c578aedc
|
3009 |
rcu_read_lock_bh(); |
1d5783030
|
3010 |
return if6_get_first(seq, *pos); |
1da177e4c
|
3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 |
} static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct inet6_ifaddr *ifa; ifa = if6_get_next(seq, v); ++*pos; return ifa; } static void if6_seq_stop(struct seq_file *seq, void *v) |
4f70ecca9
|
3023 |
__releases(rcu_bh) |
1da177e4c
|
3024 |
{ |
5c578aedc
|
3025 |
rcu_read_unlock_bh(); |
1da177e4c
|
3026 3027 3028 3029 3030 |
} static int if6_seq_show(struct seq_file *seq, void *v) { struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
4b7a4274c
|
3031 3032 |
seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s ", |
b071195de
|
3033 |
&ifp->addr, |
1da177e4c
|
3034 3035 3036 3037 3038 3039 3040 |
ifp->idev->dev->ifindex, ifp->prefix_len, ifp->scope, ifp->flags, ifp->idev->dev->name); return 0; } |
56b3d975b
|
3041 |
static const struct seq_operations if6_seq_ops = { |
1da177e4c
|
3042 3043 3044 3045 3046 3047 3048 3049 |
.start = if6_seq_start, .next = if6_seq_next, .show = if6_seq_show, .stop = if6_seq_stop, }; static int if6_seq_open(struct inode *inode, struct file *file) { |
3c40090a0
|
3050 3051 |
return seq_open_net(inode, file, &if6_seq_ops, sizeof(struct if6_iter_state)); |
1da177e4c
|
3052 |
} |
9a32144e9
|
3053 |
static const struct file_operations if6_fops = { |
1da177e4c
|
3054 3055 3056 3057 |
.owner = THIS_MODULE, .open = if6_seq_open, .read = seq_read, .llseek = seq_lseek, |
3c40090a0
|
3058 |
.release = seq_release_net, |
1da177e4c
|
3059 |
}; |
2c8c1e729
|
3060 |
static int __net_init if6_proc_net_init(struct net *net) |
1da177e4c
|
3061 |
{ |
3c40090a0
|
3062 |
if (!proc_net_fops_create(net, "if_inet6", S_IRUGO, &if6_fops)) |
1da177e4c
|
3063 3064 3065 |
return -ENOMEM; return 0; } |
2c8c1e729
|
3066 |
static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a0
|
3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 |
{ proc_net_remove(net, "if_inet6"); } static struct pernet_operations if6_proc_net_ops = { .init = if6_proc_net_init, .exit = if6_proc_net_exit, }; int __init if6_proc_init(void) { return register_pernet_subsys(&if6_proc_net_ops); } |
1da177e4c
|
3080 3081 |
void if6_proc_exit(void) { |
3c40090a0
|
3082 |
unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4c
|
3083 3084 |
} #endif /* CONFIG_PROC_FS */ |
59fbb3a61
|
3085 |
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
3b9f9a1c3
|
3086 |
/* Check if address is a home address configured on any interface. */ |
b71d1d426
|
3087 |
int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c3
|
3088 3089 |
{ int ret = 0; |
c2e21293c
|
3090 3091 |
struct inet6_ifaddr *ifp = NULL; struct hlist_node *n; |
3a88a81d8
|
3092 |
unsigned int hash = ipv6_addr_hash(addr); |
c2e21293c
|
3093 |
|
5c578aedc
|
3094 |
rcu_read_lock_bh(); |
4f70ecca9
|
3095 |
hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) { |
878628fbf
|
3096 |
if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f66122
|
3097 |
continue; |
caad295fe
|
3098 |
if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c3
|
3099 3100 3101 3102 3103 |
(ifp->flags & IFA_F_HOMEADDRESS)) { ret = 1; break; } } |
5c578aedc
|
3104 |
rcu_read_unlock_bh(); |
3b9f9a1c3
|
3105 3106 3107 |
return ret; } #endif |
1da177e4c
|
3108 3109 3110 3111 3112 3113 |
/* * Periodic address status verification */ static void addrconf_verify(unsigned long foo) { |
b2db75644
|
3114 |
unsigned long now, next, next_sec, next_sched; |
1da177e4c
|
3115 |
struct inet6_ifaddr *ifp; |
c2e21293c
|
3116 |
struct hlist_node *node; |
1da177e4c
|
3117 |
int i; |
5c578aedc
|
3118 3119 |
rcu_read_lock_bh(); spin_lock(&addrconf_verify_lock); |
1da177e4c
|
3120 |
now = jiffies; |
b2db75644
|
3121 |
next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4c
|
3122 3123 |
del_timer(&addr_chk_timer); |
bcdd553fd
|
3124 |
for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4c
|
3125 |
restart: |
4f70ecca9
|
3126 |
hlist_for_each_entry_rcu_bh(ifp, node, |
5c578aedc
|
3127 |
&inet6_addr_lst[i], addr_lst) { |
1da177e4c
|
3128 |
unsigned long age; |
1da177e4c
|
3129 3130 3131 3132 3133 |
if (ifp->flags & IFA_F_PERMANENT) continue; spin_lock(&ifp->lock); |
b2db75644
|
3134 3135 |
/* We try to batch several events at once. */ age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1da177e4c
|
3136 |
|
8f27ebb98
|
3137 3138 |
if (ifp->valid_lft != INFINITY_LIFE_TIME && age >= ifp->valid_lft) { |
1da177e4c
|
3139 3140 |
spin_unlock(&ifp->lock); in6_ifa_hold(ifp); |
1da177e4c
|
3141 3142 |
ipv6_del_addr(ifp); goto restart; |
8f27ebb98
|
3143 3144 3145 |
} else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { spin_unlock(&ifp->lock); continue; |
1da177e4c
|
3146 |
} else if (age >= ifp->prefered_lft) { |
a1ed05263
|
3147 |
/* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4c
|
3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 |
int deprecate = 0; if (!(ifp->flags&IFA_F_DEPRECATED)) { deprecate = 1; ifp->flags |= IFA_F_DEPRECATED; } if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) next = ifp->tstamp + ifp->valid_lft * HZ; spin_unlock(&ifp->lock); if (deprecate) { in6_ifa_hold(ifp); |
1da177e4c
|
3162 3163 3164 3165 3166 3167 3168 3169 |
ipv6_ifa_notify(0, ifp); in6_ifa_put(ifp); goto restart; } #ifdef CONFIG_IPV6_PRIVACY } else if ((ifp->flags&IFA_F_TEMPORARY) && !(ifp->flags&IFA_F_TENTATIVE)) { |
88949cf48
|
3170 3171 3172 |
unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * ifp->idev->cnf.dad_transmits * ifp->idev->nd_parms->retrans_time / HZ; |
1da177e4c
|
3173 3174 3175 3176 3177 3178 3179 3180 3181 |
if (age >= ifp->prefered_lft - regen_advance) { struct inet6_ifaddr *ifpub = ifp->ifpub; if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) next = ifp->tstamp + ifp->prefered_lft * HZ; if (!ifp->regen_count && ifpub) { ifp->regen_count++; in6_ifa_hold(ifp); in6_ifa_hold(ifpub); spin_unlock(&ifp->lock); |
5c578aedc
|
3182 |
|
291d809ba
|
3183 3184 3185 |
spin_lock(&ifpub->lock); ifpub->regen_count = 0; spin_unlock(&ifpub->lock); |
1da177e4c
|
3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 |
ipv6_create_tempaddr(ifpub, ifp); in6_ifa_put(ifpub); in6_ifa_put(ifp); goto restart; } } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; spin_unlock(&ifp->lock); #endif } else { /* ifp->prefered_lft <= ifp->valid_lft */ if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) next = ifp->tstamp + ifp->prefered_lft * HZ; spin_unlock(&ifp->lock); } } |
1da177e4c
|
3202 |
} |
b2db75644
|
3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 |
next_sec = round_jiffies_up(next); next_sched = next; /* If rounded timeout is accurate enough, accept it. */ if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) next_sched = next_sec; /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu ", now, next, next_sec, next_sched)); addr_chk_timer.expires = next_sched; |
1da177e4c
|
3219 |
add_timer(&addr_chk_timer); |
5c578aedc
|
3220 3221 |
spin_unlock(&addrconf_verify_lock); rcu_read_unlock_bh(); |
1da177e4c
|
3222 |
} |
461d8837f
|
3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 |
static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) { struct in6_addr *pfx = NULL; if (addr) pfx = nla_data(addr); if (local) { if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) pfx = NULL; else pfx = nla_data(local); } return pfx; } |
ef7c79ed6
|
3239 |
static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837f
|
3240 3241 3242 3243 |
[IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, }; |
1da177e4c
|
3244 3245 3246 |
static int inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { |
3b1e0a655
|
3247 |
struct net *net = sock_net(skb->sk); |
b933f7166
|
3248 3249 |
struct ifaddrmsg *ifm; struct nlattr *tb[IFA_MAX+1]; |
1da177e4c
|
3250 |
struct in6_addr *pfx; |
b933f7166
|
3251 |
int err; |
1da177e4c
|
3252 |
|
b933f7166
|
3253 3254 3255 3256 3257 3258 |
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); if (err < 0) return err; ifm = nlmsg_data(nlh); pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
1da177e4c
|
3259 3260 |
if (pfx == NULL) return -EINVAL; |
af2849377
|
3261 |
return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4c
|
3262 |
} |
55ebaef1d
|
3263 3264 |
static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, u32 prefered_lft, u32 valid_lft) |
081bba5b3
|
3265 |
{ |
6f704992d
|
3266 3267 |
u32 flags; clock_t expires; |
4bed72e4f
|
3268 |
unsigned long timeout; |
46d480468
|
3269 |
|
081bba5b3
|
3270 3271 |
if (!valid_lft || (prefered_lft > valid_lft)) return -EINVAL; |
4bed72e4f
|
3272 3273 3274 3275 |
timeout = addrconf_timeout_fixup(valid_lft, HZ); if (addrconf_finite_timeout(timeout)) { expires = jiffies_to_clock_t(timeout * HZ); valid_lft = timeout; |
6f704992d
|
3276 |
flags = RTF_EXPIRES; |
4bed72e4f
|
3277 3278 3279 3280 |
} else { expires = 0; flags = 0; ifa_flags |= IFA_F_PERMANENT; |
6f704992d
|
3281 |
} |
081bba5b3
|
3282 |
|
4bed72e4f
|
3283 3284 3285 3286 3287 3288 |
timeout = addrconf_timeout_fixup(prefered_lft, HZ); if (addrconf_finite_timeout(timeout)) { if (timeout == 0) ifa_flags |= IFA_F_DEPRECATED; prefered_lft = timeout; } |
081bba5b3
|
3289 3290 |
spin_lock_bh(&ifp->lock); |
3b9f9a1c3
|
3291 |
ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b3
|
3292 3293 3294 3295 3296 3297 3298 |
ifp->tstamp = jiffies; ifp->valid_lft = valid_lft; ifp->prefered_lft = prefered_lft; spin_unlock_bh(&ifp->lock); if (!(ifp->flags&IFA_F_TENTATIVE)) ipv6_ifa_notify(0, ifp); |
081bba5b3
|
3299 |
|
46d480468
|
3300 |
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992d
|
3301 |
expires, flags); |
081bba5b3
|
3302 3303 3304 3305 3306 3307 |
addrconf_verify(0); return 0; } static int |
1da177e4c
|
3308 3309 |
inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { |
3b1e0a655
|
3310 |
struct net *net = sock_net(skb->sk); |
461d8837f
|
3311 3312 |
struct ifaddrmsg *ifm; struct nlattr *tb[IFA_MAX+1]; |
1da177e4c
|
3313 |
struct in6_addr *pfx; |
7198f8cec
|
3314 3315 |
struct inet6_ifaddr *ifa; struct net_device *dev; |
55ebaef1d
|
3316 3317 |
u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; u8 ifa_flags; |
461d8837f
|
3318 |
int err; |
1da177e4c
|
3319 |
|
461d8837f
|
3320 3321 3322 3323 3324 3325 |
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); if (err < 0) return err; ifm = nlmsg_data(nlh); pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); |
1da177e4c
|
3326 3327 |
if (pfx == NULL) return -EINVAL; |
461d8837f
|
3328 |
if (tb[IFA_CACHEINFO]) { |
0778769d3
|
3329 |
struct ifa_cacheinfo *ci; |
461d8837f
|
3330 3331 |
ci = nla_data(tb[IFA_CACHEINFO]); |
0778769d3
|
3332 |
valid_lft = ci->ifa_valid; |
461d8837f
|
3333 3334 3335 3336 |
preferred_lft = ci->ifa_prefered; } else { preferred_lft = INFINITY_LIFE_TIME; valid_lft = INFINITY_LIFE_TIME; |
0778769d3
|
3337 |
} |
af2849377
|
3338 |
dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8cec
|
3339 3340 |
if (dev == NULL) return -ENODEV; |
55ebaef1d
|
3341 |
/* We ignore other flags so far. */ |
3b9f9a1c3
|
3342 |
ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1d
|
3343 |
|
1cab3da6b
|
3344 |
ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8cec
|
3345 3346 3347 3348 3349 |
if (ifa == NULL) { /* * It would be best to check for !NLM_F_CREATE here but * userspace alreay relies on not having to provide this. */ |
af2849377
|
3350 3351 3352 |
return inet6_addr_add(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen, ifa_flags, preferred_lft, valid_lft); |
081bba5b3
|
3353 |
} |
7198f8cec
|
3354 3355 3356 3357 |
if (nlh->nlmsg_flags & NLM_F_EXCL || !(nlh->nlmsg_flags & NLM_F_REPLACE)) err = -EEXIST; else |
55ebaef1d
|
3358 |
err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8cec
|
3359 3360 3361 3362 |
in6_ifa_put(ifa); return err; |
1da177e4c
|
3363 |
} |
101bb2296
|
3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 |
static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, u8 scope, int ifindex) { struct ifaddrmsg *ifm; ifm = nlmsg_data(nlh); ifm->ifa_family = AF_INET6; ifm->ifa_prefixlen = prefixlen; ifm->ifa_flags = flags; ifm->ifa_scope = scope; ifm->ifa_index = ifindex; } |
85486af00
|
3376 3377 3378 3379 |
static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, unsigned long tstamp, u32 preferred, u32 valid) { struct ifa_cacheinfo ci; |
18a31e1e2
|
3380 3381 |
ci.cstamp = cstamp_delta(cstamp); ci.tstamp = cstamp_delta(tstamp); |
85486af00
|
3382 3383 3384 3385 3386 |
ci.ifa_prefered = preferred; ci.ifa_valid = valid; return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); } |
101bb2296
|
3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 |
static inline int rt_scope(int ifa_scope) { if (ifa_scope & IFA_HOST) return RT_SCOPE_HOST; else if (ifa_scope & IFA_LINK) return RT_SCOPE_LINK; else if (ifa_scope & IFA_SITE) return RT_SCOPE_SITE; else return RT_SCOPE_UNIVERSE; } |
0ab6803bc
|
3398 3399 |
static inline int inet6_ifaddr_msgsize(void) { |
339bf98ff
|
3400 3401 3402 |
return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) + nla_total_size(16) /* IFA_ADDRESS */ + nla_total_size(sizeof(struct ifa_cacheinfo)); |
0ab6803bc
|
3403 |
} |
c5396a31b
|
3404 |
|
1da177e4c
|
3405 |
static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
b6544c0b4
|
3406 |
u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4c
|
3407 |
{ |
1da177e4c
|
3408 |
struct nlmsghdr *nlh; |
85486af00
|
3409 |
u32 preferred, valid; |
1da177e4c
|
3410 |
|
0ab6803bc
|
3411 3412 |
nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); if (nlh == NULL) |
26932566a
|
3413 |
return -EMSGSIZE; |
0ab6803bc
|
3414 |
|
101bb2296
|
3415 3416 |
put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), ifa->idev->dev->ifindex); |
1da177e4c
|
3417 |
if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af00
|
3418 3419 3420 |
preferred = ifa->prefered_lft; valid = ifa->valid_lft; if (preferred != INFINITY_LIFE_TIME) { |
1da177e4c
|
3421 |
long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa6981
|
3422 3423 3424 3425 |
if (preferred > tval) preferred -= tval; else preferred = 0; |
f56619fc7
|
3426 3427 3428 3429 3430 3431 |
if (valid != INFINITY_LIFE_TIME) { if (valid > tval) valid -= tval; else valid = 0; } |
1da177e4c
|
3432 3433 |
} } else { |
85486af00
|
3434 3435 3436 |
preferred = INFINITY_LIFE_TIME; valid = INFINITY_LIFE_TIME; } |
0ab6803bc
|
3437 |
if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566a
|
3438 3439 3440 3441 |
put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { nlmsg_cancel(skb, nlh); return -EMSGSIZE; } |
1da177e4c
|
3442 |
|
0ab6803bc
|
3443 |
return nlmsg_end(skb, nlh); |
1da177e4c
|
3444 3445 3446 |
} static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, |
e431b8c00
|
3447 |
u32 pid, u32 seq, int event, u16 flags) |
1da177e4c
|
3448 |
{ |
1da177e4c
|
3449 |
struct nlmsghdr *nlh; |
101bb2296
|
3450 3451 3452 3453 3454 |
u8 scope = RT_SCOPE_UNIVERSE; int ifindex = ifmca->idev->dev->ifindex; if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) scope = RT_SCOPE_SITE; |
1da177e4c
|
3455 |
|
0ab6803bc
|
3456 3457 |
nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); if (nlh == NULL) |
26932566a
|
3458 |
return -EMSGSIZE; |
85486af00
|
3459 |
|
0ab6803bc
|
3460 3461 3462 |
put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566a
|
3463 3464 3465 3466 |
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { nlmsg_cancel(skb, nlh); return -EMSGSIZE; } |
85486af00
|
3467 |
|
0ab6803bc
|
3468 |
return nlmsg_end(skb, nlh); |
1da177e4c
|
3469 3470 3471 |
} static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, |
b6544c0b4
|
3472 |
u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4c
|
3473 |
{ |
1da177e4c
|
3474 |
struct nlmsghdr *nlh; |
101bb2296
|
3475 3476 3477 3478 3479 |
u8 scope = RT_SCOPE_UNIVERSE; int ifindex = ifaca->aca_idev->dev->ifindex; if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) scope = RT_SCOPE_SITE; |
1da177e4c
|
3480 |
|
0ab6803bc
|
3481 3482 |
nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags); if (nlh == NULL) |
26932566a
|
3483 |
return -EMSGSIZE; |
85486af00
|
3484 |
|
0ab6803bc
|
3485 3486 3487 |
put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566a
|
3488 3489 3490 3491 |
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { nlmsg_cancel(skb, nlh); return -EMSGSIZE; } |
1da177e4c
|
3492 |
|
0ab6803bc
|
3493 |
return nlmsg_end(skb, nlh); |
1da177e4c
|
3494 |
} |
e21e8467d
|
3495 |
enum addr_type_t { |
1da177e4c
|
3496 3497 3498 3499 |
UNICAST_ADDR, MULTICAST_ADDR, ANYCAST_ADDR, }; |
234b27c3f
|
3500 3501 3502 3503 3504 |
/* called with rcu_read_lock() */ static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, struct netlink_callback *cb, enum addr_type_t type, int s_ip_idx, int *p_ip_idx) { |
234b27c3f
|
3505 3506 3507 3508 3509 3510 3511 |
struct ifmcaddr6 *ifmca; struct ifacaddr6 *ifaca; int err = 1; int ip_idx = *p_ip_idx; read_lock_bh(&idev->lock); switch (type) { |
502a2ffd7
|
3512 3513 |
case UNICAST_ADDR: { struct inet6_ifaddr *ifa; |
234b27c3f
|
3514 |
/* unicast address incl. temp addr */ |
502a2ffd7
|
3515 3516 |
list_for_each_entry(ifa, &idev->addr_list, if_list) { if (++ip_idx < s_ip_idx) |
234b27c3f
|
3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 |
continue; err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, RTM_NEWADDR, NLM_F_MULTI); if (err <= 0) break; } break; |
502a2ffd7
|
3527 |
} |
234b27c3f
|
3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 |
case MULTICAST_ADDR: /* multicast address */ for (ifmca = idev->mc_list; ifmca; ifmca = ifmca->next, ip_idx++) { if (ip_idx < s_ip_idx) continue; err = inet6_fill_ifmcaddr(skb, ifmca, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, RTM_GETMULTICAST, NLM_F_MULTI); if (err <= 0) break; } break; case ANYCAST_ADDR: /* anycast address */ for (ifaca = idev->ac_list; ifaca; ifaca = ifaca->aca_next, ip_idx++) { if (ip_idx < s_ip_idx) continue; err = inet6_fill_ifacaddr(skb, ifaca, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, RTM_GETANYCAST, NLM_F_MULTI); if (err <= 0) break; } break; default: break; } read_unlock_bh(&idev->lock); *p_ip_idx = ip_idx; return err; } |
1da177e4c
|
3565 3566 3567 |
static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, enum addr_type_t type) { |
234b27c3f
|
3568 3569 |
struct net *net = sock_net(skb->sk); int h, s_h; |
1da177e4c
|
3570 3571 |
int idx, ip_idx; int s_idx, s_ip_idx; |
1da177e4c
|
3572 |
struct net_device *dev; |
234b27c3f
|
3573 3574 3575 |
struct inet6_dev *idev; struct hlist_head *head; struct hlist_node *node; |
1ab1457c4
|
3576 |
|
234b27c3f
|
3577 3578 3579 |
s_h = cb->args[0]; s_idx = idx = cb->args[1]; s_ip_idx = ip_idx = cb->args[2]; |
5d5619b40
|
3580 |
|
234b27c3f
|
3581 3582 3583 3584 3585 3586 3587 |
rcu_read_lock(); for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { idx = 0; head = &net->dev_index_head[h]; hlist_for_each_entry_rcu(dev, node, head, index_hlist) { if (idx < s_idx) goto cont; |
4b97efdf3
|
3588 |
if (h > s_h || idx > s_idx) |
234b27c3f
|
3589 3590 |
s_ip_idx = 0; ip_idx = 0; |
e21e8467d
|
3591 3592 |
idev = __in6_dev_get(dev); if (!idev) |
234b27c3f
|
3593 3594 3595 3596 3597 |
goto cont; if (in6_dump_addrs(idev, skb, cb, type, s_ip_idx, &ip_idx) <= 0) goto done; |
7562f876c
|
3598 |
cont: |
234b27c3f
|
3599 3600 |
idx++; } |
1da177e4c
|
3601 |
} |
234b27c3f
|
3602 3603 3604 3605 3606 |
done: rcu_read_unlock(); cb->args[0] = h; cb->args[1] = idx; cb->args[2] = ip_idx; |
1da177e4c
|
3607 3608 3609 3610 3611 3612 |
return skb->len; } static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) { enum addr_type_t type = UNICAST_ADDR; |
b854272b3
|
3613 |
|
1da177e4c
|
3614 3615 3616 3617 3618 3619 |
return inet6_dump_addr(skb, cb, type); } static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) { enum addr_type_t type = MULTICAST_ADDR; |
b854272b3
|
3620 |
|
1da177e4c
|
3621 3622 3623 3624 3625 3626 3627 |
return inet6_dump_addr(skb, cb, type); } static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) { enum addr_type_t type = ANYCAST_ADDR; |
b854272b3
|
3628 |
|
1da177e4c
|
3629 3630 |
return inet6_dump_addr(skb, cb, type); } |
1b29fc2c8
|
3631 3632 |
static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg) |
6c2238280
|
3633 |
{ |
3b1e0a655
|
3634 |
struct net *net = sock_net(in_skb->sk); |
1b29fc2c8
|
3635 3636 |
struct ifaddrmsg *ifm; struct nlattr *tb[IFA_MAX+1]; |
6c2238280
|
3637 3638 3639 3640 |
struct in6_addr *addr = NULL; struct net_device *dev = NULL; struct inet6_ifaddr *ifa; struct sk_buff *skb; |
6c2238280
|
3641 |
int err; |
1b29fc2c8
|
3642 3643 3644 3645 3646 3647 3648 3649 |
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); if (err < 0) goto errout; addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); if (addr == NULL) { err = -EINVAL; goto errout; |
6c2238280
|
3650 |
} |
6c2238280
|
3651 |
|
1b29fc2c8
|
3652 |
ifm = nlmsg_data(nlh); |
6c2238280
|
3653 |
if (ifm->ifa_index) |
6fda73500
|
3654 |
dev = __dev_get_by_index(net, ifm->ifa_index); |
6c2238280
|
3655 |
|
e21e8467d
|
3656 3657 |
ifa = ipv6_get_ifaddr(net, addr, dev, 1); if (!ifa) { |
1b29fc2c8
|
3658 3659 3660 |
err = -EADDRNOTAVAIL; goto errout; } |
6c2238280
|
3661 |
|
e21e8467d
|
3662 3663 |
skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); if (!skb) { |
6c2238280
|
3664 |
err = -ENOBUFS; |
1b29fc2c8
|
3665 |
goto errout_ifa; |
6c2238280
|
3666 |
} |
6c2238280
|
3667 3668 |
err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566a
|
3669 3670 3671 3672 3673 3674 |
if (err < 0) { /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout_ifa; } |
6fda73500
|
3675 |
err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); |
1b29fc2c8
|
3676 |
errout_ifa: |
6c2238280
|
3677 |
in6_ifa_put(ifa); |
1b29fc2c8
|
3678 |
errout: |
6c2238280
|
3679 |
return err; |
6c2238280
|
3680 |
} |
1da177e4c
|
3681 3682 3683 |
static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) { struct sk_buff *skb; |
c346dca10
|
3684 |
struct net *net = dev_net(ifa->idev->dev); |
5d6202664
|
3685 |
int err = -ENOBUFS; |
1da177e4c
|
3686 |
|
0ab6803bc
|
3687 |
skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d6202664
|
3688 3689 3690 3691 |
if (skb == NULL) goto errout; err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566a
|
3692 3693 3694 3695 3696 3697 |
if (err < 0) { /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout; } |
1ce85fe40
|
3698 3699 |
rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); return; |
5d6202664
|
3700 3701 |
errout: if (err < 0) |
6fda73500
|
3702 |
rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4c
|
3703 |
} |
b6f99a211
|
3704 |
static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4c
|
3705 3706 |
__s32 *array, int bytes) { |
04561c1fe
|
3707 |
BUG_ON(bytes < (DEVCONF_MAX * 4)); |
1da177e4c
|
3708 3709 3710 3711 3712 3713 3714 3715 3716 |
memset(array, 0, bytes); array[DEVCONF_FORWARDING] = cnf->forwarding; array[DEVCONF_HOPLIMIT] = cnf->hop_limit; array[DEVCONF_MTU6] = cnf->mtu6; array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; array[DEVCONF_AUTOCONF] = cnf->autoconf; array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; |
93908d192
|
3717 3718 3719 3720 |
array[DEVCONF_RTR_SOLICIT_INTERVAL] = jiffies_to_msecs(cnf->rtr_solicit_interval); array[DEVCONF_RTR_SOLICIT_DELAY] = jiffies_to_msecs(cnf->rtr_solicit_delay); |
1da177e4c
|
3721 3722 3723 3724 3725 3726 3727 3728 3729 |
array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; #ifdef CONFIG_IPV6_PRIVACY array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; #endif array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c11
|
3730 |
array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb1
|
3731 |
array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2e
|
3732 3733 |
#ifdef CONFIG_IPV6_ROUTER_PREF array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; |
93908d192
|
3734 3735 |
array[DEVCONF_RTR_PROBE_INTERVAL] = jiffies_to_msecs(cnf->rtr_probe_interval); |
fa03ef38e
|
3736 |
#ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4c
|
3737 3738 |
array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; #endif |
930d6ff2e
|
3739 |
#endif |
fbea49e1e
|
3740 |
array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc9262
|
3741 |
array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4d
|
3742 3743 3744 |
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; #endif |
7bc570c8b
|
3745 3746 3747 |
#ifdef CONFIG_IPV6_MROUTE array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; #endif |
778d80be5
|
3748 |
array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74c
|
3749 |
array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca053
|
3750 |
array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
1da177e4c
|
3751 |
} |
b382b191e
|
3752 3753 3754 3755 3756 3757 3758 3759 |
static inline size_t inet6_ifla6_size(void) { return nla_total_size(4) /* IFLA_INET6_FLAGS */ + nla_total_size(sizeof(struct ifla_cacheinfo)) + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ + nla_total_size(ICMP6_MIB_MAX * 8); /* IFLA_INET6_ICMP6STATS */ } |
339bf98ff
|
3760 3761 3762 3763 3764 3765 3766 |
static inline size_t inet6_if_nlmsg_size(void) { return NLMSG_ALIGN(sizeof(struct ifinfomsg)) + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ + nla_total_size(4) /* IFLA_MTU */ + nla_total_size(4) /* IFLA_LINK */ |
b382b191e
|
3767 |
+ nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98ff
|
3768 |
} |
c5396a31b
|
3769 |
|
be281e554
|
3770 |
static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e4
|
3771 |
int items, int bytes) |
7f7d9a6b9
|
3772 3773 3774 3775 3776 3777 3778 3779 |
{ int i; int pad = bytes - sizeof(u64) * items; BUG_ON(pad < 0); /* Use put_unaligned() because stats may not be aligned for u64. */ put_unaligned(items, &stats[0]); for (i = 1; i < items; i++) |
be281e554
|
3780 |
put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b9
|
3781 3782 3783 |
memset(&stats[items], 0, pad); } |
4ce3c183f
|
3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 |
static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, int items, int bytes, size_t syncpoff) { int i; int pad = bytes - sizeof(u64) * items; BUG_ON(pad < 0); /* Use put_unaligned() because stats may not be aligned for u64. */ put_unaligned(items, &stats[0]); for (i = 1; i < items; i++) put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); memset(&stats[items], 0, pad); } |
7f7d9a6b9
|
3798 3799 3800 |
static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, int bytes) { |
e21e8467d
|
3801 |
switch (attrtype) { |
7f7d9a6b9
|
3802 |
case IFLA_INET6_STATS: |
4ce3c183f
|
3803 3804 |
__snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); |
7f7d9a6b9
|
3805 3806 |
break; case IFLA_INET6_ICMP6STATS: |
be281e554
|
3807 |
__snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b9
|
3808 3809 3810 |
break; } } |
b382b191e
|
3811 3812 3813 3814 3815 3816 3817 3818 |
static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) { struct nlattr *nla; struct ifla_cacheinfo ci; NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags); ci.max_reasm_len = IPV6_MAXPLEN; |
24912420e
|
3819 3820 3821 |
ci.tstamp = cstamp_delta(idev->tstamp); ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); |
b382b191e
|
3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 |
NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); if (nla == NULL) goto nla_put_failure; ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); /* XXX - MC not implemented */ nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); if (nla == NULL) goto nla_put_failure; snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); if (nla == NULL) goto nla_put_failure; snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); return 0; nla_put_failure: return -EMSGSIZE; } static size_t inet6_get_link_af_size(const struct net_device *dev) { if (!__in6_dev_get(dev)) return 0; return inet6_ifla6_size(); } static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) { struct inet6_dev *idev = __in6_dev_get(dev); if (!idev) return -ENODATA; if (inet6_fill_ifla6_attrs(skb, idev) < 0) return -EMSGSIZE; return 0; } |
1ab1457c4
|
3867 |
static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
b6544c0b4
|
3868 |
u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4c
|
3869 |
{ |
04561c1fe
|
3870 |
struct net_device *dev = idev->dev; |
04561c1fe
|
3871 3872 3873 |
struct ifinfomsg *hdr; struct nlmsghdr *nlh; void *protoinfo; |
04561c1fe
|
3874 3875 3876 |
nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); if (nlh == NULL) |
26932566a
|
3877 |
return -EMSGSIZE; |
04561c1fe
|
3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 |
hdr = nlmsg_data(nlh); hdr->ifi_family = AF_INET6; hdr->__ifi_pad = 0; hdr->ifi_type = dev->type; hdr->ifi_index = dev->ifindex; hdr->ifi_flags = dev_get_flags(dev); hdr->ifi_change = 0; NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); |
1da177e4c
|
3888 3889 |
if (dev->addr_len) |
04561c1fe
|
3890 |
NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
1da177e4c
|
3891 |
|
04561c1fe
|
3892 |
NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); |
1da177e4c
|
3893 |
if (dev->ifindex != dev->iflink) |
04561c1fe
|
3894 |
NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); |
1da177e4c
|
3895 |
|
04561c1fe
|
3896 3897 3898 |
protoinfo = nla_nest_start(skb, IFLA_PROTINFO); if (protoinfo == NULL) goto nla_put_failure; |
1da177e4c
|
3899 |
|
b382b191e
|
3900 |
if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bde
|
3901 |
goto nla_put_failure; |
1da177e4c
|
3902 |
|
04561c1fe
|
3903 3904 |
nla_nest_end(skb, protoinfo); return nlmsg_end(skb, nlh); |
1da177e4c
|
3905 |
|
04561c1fe
|
3906 |
nla_put_failure: |
26932566a
|
3907 3908 |
nlmsg_cancel(skb, nlh); return -EMSGSIZE; |
1da177e4c
|
3909 3910 3911 3912 |
} static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) { |
3b1e0a655
|
3913 |
struct net *net = sock_net(skb->sk); |
84d2697d9
|
3914 |
int h, s_h; |
434a8a58d
|
3915 |
int idx = 0, s_idx; |
1da177e4c
|
3916 3917 |
struct net_device *dev; struct inet6_dev *idev; |
84d2697d9
|
3918 3919 |
struct hlist_head *head; struct hlist_node *node; |
1da177e4c
|
3920 |
|
84d2697d9
|
3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 |
s_h = cb->args[0]; s_idx = cb->args[1]; rcu_read_lock(); for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { idx = 0; head = &net->dev_index_head[h]; hlist_for_each_entry_rcu(dev, node, head, index_hlist) { if (idx < s_idx) goto cont; idev = __in6_dev_get(dev); if (!idev) goto cont; if (inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI) <= 0) goto out; |
7562f876c
|
3939 |
cont: |
84d2697d9
|
3940 3941 |
idx++; } |
1da177e4c
|
3942 |
} |
84d2697d9
|
3943 3944 3945 3946 |
out: rcu_read_unlock(); cb->args[1] = idx; cb->args[0] = h; |
1da177e4c
|
3947 3948 3949 3950 3951 3952 3953 |
return skb->len; } void inet6_ifinfo_notify(int event, struct inet6_dev *idev) { struct sk_buff *skb; |
c346dca10
|
3954 |
struct net *net = dev_net(idev->dev); |
8d7a76c9b
|
3955 |
int err = -ENOBUFS; |
1ab1457c4
|
3956 |
|
339bf98ff
|
3957 |
skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9b
|
3958 3959 3960 3961 |
if (skb == NULL) goto errout; err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); |
26932566a
|
3962 3963 3964 3965 3966 3967 |
if (err < 0) { /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout; } |
5f75a1042
|
3968 |
rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe40
|
3969 |
return; |
8d7a76c9b
|
3970 3971 |
errout: if (err < 0) |
5f75a1042
|
3972 |
rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4c
|
3973 |
} |
339bf98ff
|
3974 3975 3976 3977 3978 3979 |
static inline size_t inet6_prefix_nlmsg_size(void) { return NLMSG_ALIGN(sizeof(struct prefixmsg)) + nla_total_size(sizeof(struct in6_addr)) + nla_total_size(sizeof(struct prefix_cacheinfo)); } |
c5396a31b
|
3980 |
|
1da177e4c
|
3981 |
static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
6051e2f4f
|
3982 3983 |
struct prefix_info *pinfo, u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4c
|
3984 |
{ |
6051e2f4f
|
3985 3986 |
struct prefixmsg *pmsg; struct nlmsghdr *nlh; |
1da177e4c
|
3987 |
struct prefix_cacheinfo ci; |
6051e2f4f
|
3988 3989 |
nlh = nlmsg_put(skb, pid, seq, event, sizeof(*pmsg), flags); if (nlh == NULL) |
26932566a
|
3990 |
return -EMSGSIZE; |
6051e2f4f
|
3991 3992 |
pmsg = nlmsg_data(nlh); |
1da177e4c
|
3993 |
pmsg->prefix_family = AF_INET6; |
8a47077a0
|
3994 3995 |
pmsg->prefix_pad1 = 0; pmsg->prefix_pad2 = 0; |
1da177e4c
|
3996 3997 3998 |
pmsg->prefix_ifindex = idev->dev->ifindex; pmsg->prefix_len = pinfo->prefix_len; pmsg->prefix_type = pinfo->type; |
8a47077a0
|
3999 |
pmsg->prefix_pad3 = 0; |
1da177e4c
|
4000 4001 4002 4003 4004 |
pmsg->prefix_flags = 0; if (pinfo->onlink) pmsg->prefix_flags |= IF_PREFIX_ONLINK; if (pinfo->autoconf) pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; |
6051e2f4f
|
4005 |
NLA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
1da177e4c
|
4006 4007 4008 |
ci.preferred_time = ntohl(pinfo->prefered); ci.valid_time = ntohl(pinfo->valid); |
6051e2f4f
|
4009 |
NLA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
1da177e4c
|
4010 |
|
6051e2f4f
|
4011 |
return nlmsg_end(skb, nlh); |
1da177e4c
|
4012 |
|
6051e2f4f
|
4013 |
nla_put_failure: |
26932566a
|
4014 4015 |
nlmsg_cancel(skb, nlh); return -EMSGSIZE; |
1da177e4c
|
4016 |
} |
1ab1457c4
|
4017 |
static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4c
|
4018 4019 4020 |
struct prefix_info *pinfo) { struct sk_buff *skb; |
c346dca10
|
4021 |
struct net *net = dev_net(idev->dev); |
8c384bfa3
|
4022 |
int err = -ENOBUFS; |
1da177e4c
|
4023 |
|
339bf98ff
|
4024 |
skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa3
|
4025 4026 4027 4028 |
if (skb == NULL) goto errout; err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); |
26932566a
|
4029 4030 4031 4032 4033 4034 |
if (err < 0) { /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout; } |
1ce85fe40
|
4035 4036 |
rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); return; |
8c384bfa3
|
4037 4038 |
errout: if (err < 0) |
6fda73500
|
4039 |
rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4c
|
4040 |
} |
1da177e4c
|
4041 4042 4043 4044 4045 4046 |
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) { inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); switch (event) { case RTM_NEWADDR: |
95c385b4d
|
4047 4048 4049 4050 4051 4052 4053 4054 |
/* * If the address was optimistic * we inserted the route at the start of * our DAD process, so we don't need * to do it again */ if (!(ifp->rt->rt6i_node)) ip6_ins_rt(ifp->rt); |
1da177e4c
|
4055 4056 4057 4058 4059 4060 4061 |
if (ifp->idev->cnf.forwarding) addrconf_join_anycast(ifp); break; case RTM_DELADDR: if (ifp->idev->cnf.forwarding) addrconf_leave_anycast(ifp); addrconf_leave_solict(ifp->idev, &ifp->addr); |
d8d1f30b9
|
4062 |
dst_hold(&ifp->rt->dst); |
93fa159ab
|
4063 |
|
73a8bd74e
|
4064 |
if (ip6_del_rt(ifp->rt)) |
d8d1f30b9
|
4065 |
dst_free(&ifp->rt->dst); |
1da177e4c
|
4066 4067 4068 4069 4070 4071 |
break; } } static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) { |
8814c4b53
|
4072 |
rcu_read_lock_bh(); |
1da177e4c
|
4073 4074 |
if (likely(ifp->idev->dead == 0)) __ipv6_ifa_notify(event, ifp); |
8814c4b53
|
4075 |
rcu_read_unlock_bh(); |
1da177e4c
|
4076 4077 4078 4079 4080 |
} #ifdef CONFIG_SYSCTL static |
8d65af789
|
4081 |
int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4c
|
4082 4083 4084 4085 |
void __user *buffer, size_t *lenp, loff_t *ppos) { int *valp = ctl->data; int val = *valp; |
88af182e3
|
4086 |
loff_t pos = *ppos; |
1da177e4c
|
4087 |
int ret; |
8d65af789
|
4088 |
ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4c
|
4089 |
|
c8fecf224
|
4090 |
if (write) |
b325fddb7
|
4091 |
ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e3
|
4092 4093 |
if (ret) *ppos = pos; |
1ab1457c4
|
4094 |
return ret; |
1da177e4c
|
4095 |
} |
56d417b12
|
4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 |
static void dev_disable_change(struct inet6_dev *idev) { if (!idev || !idev->dev) return; if (idev->cnf.disable_ipv6) addrconf_notify(NULL, NETDEV_DOWN, idev->dev); else addrconf_notify(NULL, NETDEV_UP, idev->dev); } static void addrconf_disable_change(struct net *net, __s32 newf) { struct net_device *dev; struct inet6_dev *idev; |
c6d14c845
|
4111 4112 |
rcu_read_lock(); for_each_netdev_rcu(net, dev) { |
56d417b12
|
4113 4114 4115 4116 4117 4118 4119 |
idev = __in6_dev_get(dev); if (idev) { int changed = (!idev->cnf.disable_ipv6) ^ (!newf); idev->cnf.disable_ipv6 = newf; if (changed) dev_disable_change(idev); } |
56d417b12
|
4120 |
} |
c6d14c845
|
4121 |
rcu_read_unlock(); |
56d417b12
|
4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 |
} static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int old) { struct net *net; net = (struct net *)table->extra2; if (p == &net->ipv6.devconf_dflt->disable_ipv6) return 0; |
88af182e3
|
4132 4133 4134 |
if (!rtnl_trylock()) { /* Restore the original values before restarting */ *p = old; |
56d417b12
|
4135 |
return restart_syscall(); |
88af182e3
|
4136 |
} |
56d417b12
|
4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 |
if (p == &net->ipv6.devconf_all->disable_ipv6) { __s32 newf = net->ipv6.devconf_all->disable_ipv6; net->ipv6.devconf_dflt->disable_ipv6 = newf; addrconf_disable_change(net, newf); } else if ((!*p) ^ (!old)) dev_disable_change((struct inet6_dev *)table->extra1); rtnl_unlock(); return 0; } static |
8d65af789
|
4150 |
int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b12
|
4151 4152 4153 4154 |
void __user *buffer, size_t *lenp, loff_t *ppos) { int *valp = ctl->data; int val = *valp; |
88af182e3
|
4155 |
loff_t pos = *ppos; |
56d417b12
|
4156 |
int ret; |
8d65af789
|
4157 |
ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
56d417b12
|
4158 4159 4160 |
if (write) ret = addrconf_disable_ipv6(ctl, valp, val); |
88af182e3
|
4161 4162 |
if (ret) *ppos = pos; |
56d417b12
|
4163 4164 |
return ret; } |
1da177e4c
|
4165 4166 4167 |
static struct addrconf_sysctl_table { struct ctl_table_header *sysctl_header; |
f6a07b293
|
4168 |
ctl_table addrconf_vars[DEVCONF_MAX+1]; |
1dab62226
|
4169 |
char *dev_name; |
ab32ea5d8
|
4170 |
} addrconf_sysctl __read_mostly = { |
1da177e4c
|
4171 4172 |
.sysctl_header = NULL, .addrconf_vars = { |
1ab1457c4
|
4173 |
{ |
e21e8467d
|
4174 4175 4176 4177 4178 |
.procname = "forwarding", .data = &ipv6_devconf.forwarding, .maxlen = sizeof(int), .mode = 0644, .proc_handler = addrconf_sysctl_forward, |
1da177e4c
|
4179 4180 |
}, { |
e21e8467d
|
4181 4182 4183 4184 4185 |
.procname = "hop_limit", .data = &ipv6_devconf.hop_limit, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4186 4187 |
}, { |
e21e8467d
|
4188 4189 4190 4191 4192 |
.procname = "mtu", .data = &ipv6_devconf.mtu6, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4193 4194 |
}, { |
e21e8467d
|
4195 4196 4197 4198 4199 |
.procname = "accept_ra", .data = &ipv6_devconf.accept_ra, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4200 4201 |
}, { |
e21e8467d
|
4202 4203 4204 4205 4206 |
.procname = "accept_redirects", .data = &ipv6_devconf.accept_redirects, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4207 4208 |
}, { |
e21e8467d
|
4209 4210 4211 4212 4213 |
.procname = "autoconf", .data = &ipv6_devconf.autoconf, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4214 4215 |
}, { |
e21e8467d
|
4216 4217 4218 4219 4220 |
.procname = "dad_transmits", .data = &ipv6_devconf.dad_transmits, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4221 4222 |
}, { |
e21e8467d
|
4223 4224 4225 4226 4227 |
.procname = "router_solicitations", .data = &ipv6_devconf.rtr_solicits, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4228 4229 |
}, { |
e21e8467d
|
4230 4231 4232 4233 4234 |
.procname = "router_solicitation_interval", .data = &ipv6_devconf.rtr_solicit_interval, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, |
1da177e4c
|
4235 4236 |
}, { |
e21e8467d
|
4237 4238 4239 4240 4241 |
.procname = "router_solicitation_delay", .data = &ipv6_devconf.rtr_solicit_delay, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, |
1da177e4c
|
4242 4243 |
}, { |
e21e8467d
|
4244 4245 4246 4247 4248 |
.procname = "force_mld_version", .data = &ipv6_devconf.force_mld_version, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4249 4250 4251 |
}, #ifdef CONFIG_IPV6_PRIVACY { |
e21e8467d
|
4252 4253 4254 4255 4256 |
.procname = "use_tempaddr", .data = &ipv6_devconf.use_tempaddr, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4257 4258 |
}, { |
e21e8467d
|
4259 4260 4261 4262 4263 |
.procname = "temp_valid_lft", .data = &ipv6_devconf.temp_valid_lft, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4264 4265 |
}, { |
e21e8467d
|
4266 4267 4268 4269 4270 |
.procname = "temp_prefered_lft", .data = &ipv6_devconf.temp_prefered_lft, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4271 4272 |
}, { |
e21e8467d
|
4273 4274 4275 4276 4277 |
.procname = "regen_max_retry", .data = &ipv6_devconf.regen_max_retry, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4278 4279 |
}, { |
e21e8467d
|
4280 4281 4282 4283 4284 |
.procname = "max_desync_factor", .data = &ipv6_devconf.max_desync_factor, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4285 4286 4287 |
}, #endif { |
e21e8467d
|
4288 4289 4290 4291 4292 |
.procname = "max_addresses", .data = &ipv6_devconf.max_addresses, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1da177e4c
|
4293 4294 |
}, { |
e21e8467d
|
4295 4296 4297 4298 4299 |
.procname = "accept_ra_defrtr", .data = &ipv6_devconf.accept_ra_defrtr, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
65f5c7c11
|
4300 4301 |
}, { |
e21e8467d
|
4302 4303 4304 4305 4306 |
.procname = "accept_ra_pinfo", .data = &ipv6_devconf.accept_ra_pinfo, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
c4fd30eb1
|
4307 |
}, |
930d6ff2e
|
4308 4309 |
#ifdef CONFIG_IPV6_ROUTER_PREF { |
e21e8467d
|
4310 4311 4312 4313 4314 |
.procname = "accept_ra_rtr_pref", .data = &ipv6_devconf.accept_ra_rtr_pref, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
930d6ff2e
|
4315 |
}, |
52e163563
|
4316 |
{ |
e21e8467d
|
4317 4318 4319 4320 4321 |
.procname = "router_probe_interval", .data = &ipv6_devconf.rtr_probe_interval, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, |
52e163563
|
4322 |
}, |
fa03ef38e
|
4323 |
#ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4c
|
4324 |
{ |
e21e8467d
|
4325 4326 4327 4328 4329 |
.procname = "accept_ra_rt_info_max_plen", .data = &ipv6_devconf.accept_ra_rt_info_max_plen, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
09c884d4c
|
4330 4331 |
}, #endif |
930d6ff2e
|
4332 |
#endif |
c4fd30eb1
|
4333 |
{ |
e21e8467d
|
4334 4335 4336 4337 4338 |
.procname = "proxy_ndp", .data = &ipv6_devconf.proxy_ndp, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
fbea49e1e
|
4339 4340 |
}, { |
e21e8467d
|
4341 4342 4343 4344 4345 |
.procname = "accept_source_route", .data = &ipv6_devconf.accept_source_route, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
0bcbc9262
|
4346 |
}, |
95c385b4d
|
4347 4348 |
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD { |
e21e8467d
|
4349 4350 4351 4352 4353 |
.procname = "optimistic_dad", .data = &ipv6_devconf.optimistic_dad, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
95c385b4d
|
4354 4355 4356 |
}, #endif |
7bc570c8b
|
4357 4358 |
#ifdef CONFIG_IPV6_MROUTE { |
e21e8467d
|
4359 4360 4361 4362 4363 |
.procname = "mc_forwarding", .data = &ipv6_devconf.mc_forwarding, .maxlen = sizeof(int), .mode = 0444, .proc_handler = proc_dointvec, |
7bc570c8b
|
4364 4365 |
}, #endif |
0bcbc9262
|
4366 |
{ |
e21e8467d
|
4367 4368 4369 4370 4371 |
.procname = "disable_ipv6", .data = &ipv6_devconf.disable_ipv6, .maxlen = sizeof(int), .mode = 0644, .proc_handler = addrconf_sysctl_disable, |
778d80be5
|
4372 4373 |
}, { |
e21e8467d
|
4374 4375 4376 4377 4378 |
.procname = "accept_dad", .data = &ipv6_devconf.accept_dad, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, |
1b34be74c
|
4379 4380 |
}, { |
f7734fdf6
|
4381 4382 4383 4384 4385 4386 4387 |
.procname = "force_tllao", .data = &ipv6_devconf.force_tllao, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, { |
f8572d8f2
|
4388 |
/* sentinel */ |
1da177e4c
|
4389 4390 |
} }, |
1da177e4c
|
4391 |
}; |
bff16c2f9
|
4392 |
static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f2
|
4393 |
struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4c
|
4394 4395 |
{ int i; |
1da177e4c
|
4396 |
struct addrconf_sysctl_table *t; |
1da177e4c
|
4397 |
|
1dab62226
|
4398 4399 4400 |
#define ADDRCONF_CTL_PATH_DEV 3 struct ctl_path addrconf_ctl_path[] = { |
f8572d8f2
|
4401 4402 4403 |
{ .procname = "net", }, { .procname = "ipv6", }, { .procname = "conf", }, |
1dab62226
|
4404 4405 4406 |
{ /* to be set */ }, { }, }; |
af879cc70
|
4407 |
t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4c
|
4408 |
if (t == NULL) |
f68635e62
|
4409 |
goto out; |
bcdd553fd
|
4410 |
for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467d
|
4411 |
t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4c
|
4412 |
t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f9
|
4413 |
t->addrconf_vars[i].extra2 = net; |
1da177e4c
|
4414 |
} |
1da177e4c
|
4415 |
|
1ab1457c4
|
4416 4417 |
/* * Make a copy of dev_name, because '.procname' is regarded as const |
1da177e4c
|
4418 4419 |
* by sysctl and we wouldn't want anyone to change it under our feet * (see SIOCSIFNAME). |
1ab1457c4
|
4420 |
*/ |
1dab62226
|
4421 4422 |
t->dev_name = kstrdup(dev_name, GFP_KERNEL); if (!t->dev_name) |
f68635e62
|
4423 |
goto free; |
1da177e4c
|
4424 |
|
1dab62226
|
4425 |
addrconf_ctl_path[ADDRCONF_CTL_PATH_DEV].procname = t->dev_name; |
1da177e4c
|
4426 |
|
bff16c2f9
|
4427 |
t->sysctl_header = register_net_sysctl_table(net, addrconf_ctl_path, |
1dab62226
|
4428 |
t->addrconf_vars); |
1da177e4c
|
4429 4430 |
if (t->sysctl_header == NULL) goto free_procname; |
f68635e62
|
4431 4432 |
p->sysctl = t; |
958973122
|
4433 |
return 0; |
1da177e4c
|
4434 |
|
f68635e62
|
4435 |
free_procname: |
1dab62226
|
4436 |
kfree(t->dev_name); |
f68635e62
|
4437 |
free: |
1da177e4c
|
4438 |
kfree(t); |
f68635e62
|
4439 |
out: |
958973122
|
4440 |
return -ENOBUFS; |
1da177e4c
|
4441 |
} |
408c4768c
|
4442 4443 4444 4445 4446 4447 4448 4449 4450 |
static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) { struct addrconf_sysctl_table *t; if (p->sysctl == NULL) return; t = p->sysctl; p->sysctl = NULL; |
ff538818f
|
4451 |
unregister_net_sysctl_table(t->sysctl_header); |
408c4768c
|
4452 4453 4454 |
kfree(t->dev_name); kfree(t); } |
f52295a9c
|
4455 4456 |
static void addrconf_sysctl_register(struct inet6_dev *idev) { |
54716e3be
|
4457 |
neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f2
|
4458 |
&ndisc_ifinfo_sysctl_change); |
c346dca10
|
4459 |
__addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f2
|
4460 |
idev, &idev->cnf); |
f52295a9c
|
4461 |
} |
408c4768c
|
4462 |
static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4c
|
4463 |
{ |
408c4768c
|
4464 4465 |
__addrconf_sysctl_unregister(&idev->cnf); neigh_sysctl_unregister(idev->nd_parms); |
1da177e4c
|
4466 4467 4468 4469 |
} #endif |
2c8c1e729
|
4470 |
static int __net_init addrconf_init_net(struct net *net) |
e0da5a480
|
4471 4472 4473 4474 4475 4476 4477 |
{ int err; struct ipv6_devconf *all, *dflt; err = -ENOMEM; all = &ipv6_devconf; dflt = &ipv6_devconf_dflt; |
09ad9bc75
|
4478 |
if (!net_eq(net, &init_net)) { |
e0da5a480
|
4479 4480 4481 4482 4483 4484 4485 |
all = kmemdup(all, sizeof(ipv6_devconf), GFP_KERNEL); if (all == NULL) goto err_alloc_all; dflt = kmemdup(dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); if (dflt == NULL) goto err_alloc_dflt; |
56d417b12
|
4486 4487 4488 4489 |
} else { /* these will be inherited by all namespaces */ dflt->autoconf = ipv6_defaults.autoconf; dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; |
e0da5a480
|
4490 4491 4492 4493 4494 4495 |
} net->ipv6.devconf_all = all; net->ipv6.devconf_dflt = dflt; #ifdef CONFIG_SYSCTL |
f8572d8f2
|
4496 |
err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a480
|
4497 4498 |
if (err < 0) goto err_reg_all; |
f8572d8f2
|
4499 |
err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a480
|
4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 |
if (err < 0) goto err_reg_dflt; #endif return 0; #ifdef CONFIG_SYSCTL err_reg_dflt: __addrconf_sysctl_unregister(all); err_reg_all: kfree(dflt); #endif err_alloc_dflt: kfree(all); err_alloc_all: return err; } |
2c8c1e729
|
4516 |
static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a480
|
4517 4518 4519 4520 4521 |
{ #ifdef CONFIG_SYSCTL __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); __addrconf_sysctl_unregister(net->ipv6.devconf_all); #endif |
09ad9bc75
|
4522 |
if (!net_eq(net, &init_net)) { |
e0da5a480
|
4523 4524 4525 4526 4527 4528 4529 4530 4531 |
kfree(net->ipv6.devconf_dflt); kfree(net->ipv6.devconf_all); } } static struct pernet_operations addrconf_ops = { .init = addrconf_init_net, .exit = addrconf_exit_net, }; |
1da177e4c
|
4532 4533 4534 4535 4536 4537 |
/* * Device notifier */ int register_inet6addr_notifier(struct notifier_block *nb) { |
1ab1457c4
|
4538 |
return atomic_notifier_chain_register(&inet6addr_chain, nb); |
1da177e4c
|
4539 |
} |
7159039a1
|
4540 |
EXPORT_SYMBOL(register_inet6addr_notifier); |
1da177e4c
|
4541 4542 |
int unregister_inet6addr_notifier(struct notifier_block *nb) { |
e21e8467d
|
4543 |
return atomic_notifier_chain_unregister(&inet6addr_chain, nb); |
1da177e4c
|
4544 |
} |
7159039a1
|
4545 |
EXPORT_SYMBOL(unregister_inet6addr_notifier); |
b382b191e
|
4546 4547 4548 4549 |
static struct rtnl_af_ops inet6_ops = { .family = AF_INET6, .fill_link_af = inet6_fill_link_af, .get_link_af_size = inet6_get_link_af_size, |
b382b191e
|
4550 |
}; |
1da177e4c
|
4551 4552 4553 4554 4555 4556 |
/* * Init / cleanup code */ int __init addrconf_init(void) { |
c2e21293c
|
4557 |
int i, err; |
2a8cc6c89
|
4558 |
|
e21e8467d
|
4559 4560 4561 4562 4563 |
err = ipv6_addr_label_init(); if (err < 0) { printk(KERN_CRIT "IPv6 Addrconf:" " cannot initialize default policy table: %d. ", err); |
2cc6d2bf3
|
4564 |
goto out; |
2a8cc6c89
|
4565 |
} |
1da177e4c
|
4566 |
|
2cc6d2bf3
|
4567 4568 4569 |
err = register_pernet_subsys(&addrconf_ops); if (err < 0) goto out_addrlabel; |
e0da5a480
|
4570 |
|
1da177e4c
|
4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 |
/* The addrconf netdev notifier requires that loopback_dev * has it's ipv6 private information allocated and setup * before it can bring up and give link-local addresses * to other devices which are up. * * Unfortunately, loopback_dev is not necessarily the first * entry in the global dev_base list of net devices. In fact, * it is likely to be the very last entry on that list. * So this causes the notifier registry below to try and * give link-local addresses to all devices besides loopback_dev * first, then loopback_dev, which cases all the non-loopback_dev * devices to fail to get a link-local address. * * So, as a temporary fix, allocate the ipv6 structure for * loopback_dev first by hand. * Longer term, all of the dependencies ipv6 has upon the loopback * device and it being up should be removed. */ rtnl_lock(); |
2774c7aba
|
4590 |
if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4c
|
4591 4592 4593 |
err = -ENOMEM; rtnl_unlock(); if (err) |
e0da5a480
|
4594 |
goto errlo; |
1da177e4c
|
4595 |
|
c2e21293c
|
4596 4597 |
for (i = 0; i < IN6_ADDR_HSIZE; i++) INIT_HLIST_HEAD(&inet6_addr_lst[i]); |
1da177e4c
|
4598 |
register_netdevice_notifier(&ipv6_dev_notf); |
1da177e4c
|
4599 |
addrconf_verify(0); |
c127ea2c4
|
4600 |
|
b382b191e
|
4601 4602 4603 |
err = rtnl_af_register(&inet6_ops); if (err < 0) goto errout_af; |
c7ac8679b
|
4604 4605 |
err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, NULL); |
c127ea2c4
|
4606 4607 4608 4609 |
if (err < 0) goto errout; /* Only the first call to __rtnl_register can fail */ |
c7ac8679b
|
4610 4611 4612 4613 4614 4615 4616 4617 |
__rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr, NULL); __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr, NULL); __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr, NULL); |
c127ea2c4
|
4618 |
|
2a8cc6c89
|
4619 |
ipv6_addr_label_rtnl_register(); |
1da177e4c
|
4620 |
return 0; |
c127ea2c4
|
4621 |
errout: |
b382b191e
|
4622 4623 |
rtnl_af_unregister(&inet6_ops); errout_af: |
c127ea2c4
|
4624 |
unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a480
|
4625 4626 |
errlo: unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf3
|
4627 4628 4629 |
out_addrlabel: ipv6_addr_label_cleanup(); out: |
c127ea2c4
|
4630 |
return err; |
1da177e4c
|
4631 |
} |
09f7709f4
|
4632 |
void addrconf_cleanup(void) |
1da177e4c
|
4633 |
{ |
176c39af2
|
4634 |
struct net_device *dev; |
1da177e4c
|
4635 4636 4637 |
int i; unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a480
|
4638 |
unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf3
|
4639 |
ipv6_addr_label_cleanup(); |
1da177e4c
|
4640 4641 |
rtnl_lock(); |
b382b191e
|
4642 |
__rtnl_af_unregister(&inet6_ops); |
176c39af2
|
4643 4644 4645 4646 4647 4648 4649 |
/* clean dev list */ for_each_netdev(&init_net, dev) { if (__in6_dev_get(dev) == NULL) continue; addrconf_ifdown(dev, 1); } addrconf_ifdown(init_net.loopback_dev, 2); |
1da177e4c
|
4650 |
/* |
1da177e4c
|
4651 4652 |
* Check hash table. */ |
5c578aedc
|
4653 |
spin_lock_bh(&addrconf_hash_lock); |
c2e21293c
|
4654 4655 |
for (i = 0; i < IN6_ADDR_HSIZE; i++) WARN_ON(!hlist_empty(&inet6_addr_lst[i])); |
5c578aedc
|
4656 |
spin_unlock_bh(&addrconf_hash_lock); |
1da177e4c
|
4657 4658 |
del_timer(&addr_chk_timer); |
1da177e4c
|
4659 |
rtnl_unlock(); |
1da177e4c
|
4660 |
} |