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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#define MAX_RTR_SOLICITATIONS -1 /* unlimited */#define RTR_SOLICITATION_INTERVAL (4*HZ)#define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */
#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
/* TEMP_VALID_LIFETIME default value as specified in RFC 8981 3.8 */#define TEMP_VALID_LIFETIME (2*86400) /* 2 days */#define TEMP_PREFERRED_LIFETIME (86400) /* 24 hours */#define REGEN_MIN_ADVANCE (2) /* 2 seconds */#define REGEN_MAX_RETRY (3)#define MAX_DESYNC_FACTOR (600)
#define ADDR_CHECK_FREQUENCY (120*HZ)
#define IPV6_MAX_ADDRESSES 16
#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)#define ADDRCONF_TIMER_FUZZ (HZ / 4)#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
#define ADDRCONF_NOTIFY_PRIORITY 0
#include <linux/in.h>#include <linux/in6.h>
struct prefix_info { __u8 type; __u8 length; __u8 prefix_len;
union __packed { __u8 flags; struct __packed {#if defined(__BIG_ENDIAN_BITFIELD) __u8 onlink : 1, autoconf : 1, routeraddr : 1, preferpd : 1, reserved : 4;#elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 reserved : 4, preferpd : 1, routeraddr : 1, autoconf : 1, onlink : 1;#else#error "Please fix <asm/byteorder.h>"#endif }; }; __be32 valid; __be32 prefered; __be32 reserved2;
struct in6_addr prefix;};
/* rfc4861 4.6.2: IPv6 PIO is 32 bytes in size */static_assert(sizeof(struct prefix_info) == 32);
#include <linux/ipv6.h>#include <linux/netdevice.h>#include <net/if_inet6.h>#include <net/ipv6.h>
struct in6_validator_info { struct in6_addr i6vi_addr; struct inet6_dev *i6vi_dev; struct netlink_ext_ack *extack;};
struct ifa6_config { const struct in6_addr *pfx; unsigned int plen;
u8 ifa_proto;
const struct in6_addr *peer_pfx;
u32 rt_priority; u32 ifa_flags; u32 preferred_lft; u32 valid_lft; u16 scope;};
enum addr_type_t { UNICAST_ADDR, MULTICAST_ADDR, ANYCAST_ADDR,};
struct inet6_fill_args { u32 portid; u32 seq; int event; unsigned int flags; int netnsid; int ifindex; enum addr_type_t type; bool force_rt_scope_universe;};
int addrconf_init(void);void addrconf_cleanup(void);
int addrconf_add_ifaddr(struct net *net, void __user *arg);int addrconf_del_ifaddr(struct net *net, void __user *arg);int addrconf_set_dstaddr(struct net *net, void __user *arg);
int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, const struct net_device *dev, int strict);int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, const struct net_device *dev, bool skip_dev_check, int strict, u32 banned_flags);
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);#endif
int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs, unsigned char nsegs);
bool ipv6_chk_custom_prefix(const struct in6_addr *addr, const unsigned int prefix_len, struct net_device *dev);
int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr, struct net_device *dev);
struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, struct net_device *dev, int strict);
int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, const struct in6_addr *daddr, unsigned int srcprefs, struct in6_addr *saddr);int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, u32 banned_flags);bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, bool match_wildcard);bool inet_rcv_saddr_any(const struct sock *sk);void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr, u32 flags);
int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, const struct prefix_info *pinfo, struct inet6_dev *in6_dev, const struct in6_addr *addr, int addr_type, u32 addr_flags, bool sllao, bool tokenized, __u32 valid_lft, u32 prefered_lft);
static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr){ memcpy(eui, addr, 3); eui[3] = 0xFF; eui[4] = 0xFE; memcpy(eui + 5, addr + 3, 3);}
static inline void addrconf_addr_eui48(u8 *eui, const char *const addr){ addrconf_addr_eui48_base(eui, addr); eui[0] ^= 2;}
static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev){ if (dev->addr_len != ETH_ALEN) return -1;
/* * 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. */
addrconf_addr_eui48_base(eui, dev->dev_addr);
if (dev->dev_id) { eui[3] = (dev->dev_id >> 8) & 0xFF; eui[4] = dev->dev_id & 0xFF; } else { eui[0] ^= 2; }
return 0;}
#define INFINITY_LIFE_TIME 0xFFFFFFFF
static inline unsigned long addrconf_timeout_fixup(u32 timeout, unsigned int unit){ if (timeout == INFINITY_LIFE_TIME) return ~0UL;
/* * Avoid arithmetic overflow. * Assuming unit is constant and non-zero, this "if" statement * will go away on 64bit archs. */ if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) return LONG_MAX / unit;
return timeout;}
static inline int addrconf_finite_timeout(unsigned long timeout){ return ~timeout;}
/* * IPv6 Address Label subsystem (addrlabel.c) */int ipv6_addr_label_init(void);void ipv6_addr_label_cleanup(void);int ipv6_addr_label_rtnl_register(void);u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, int type, int ifindex);
/* * multicast prototypes (mcast.c) */static inline bool ipv6_mc_may_pull(struct sk_buff *skb, unsigned int len){ if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len) return false;
return pskb_may_pull(skb, len);}
int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr);int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr);void __ipv6_sock_mc_close(struct sock *sk);void ipv6_sock_mc_close(struct sock *sk);bool inet6_mc_check(const struct sock *sk, const struct in6_addr *mc_addr, const struct in6_addr *src_addr);
int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);void ipv6_mc_up(struct inet6_dev *idev);void ipv6_mc_down(struct inet6_dev *idev);void ipv6_mc_unmap(struct inet6_dev *idev);void ipv6_mc_remap(struct inet6_dev *idev);void ipv6_mc_init_dev(struct inet6_dev *idev);void ipv6_mc_destroy_dev(struct inet6_dev *idev);int ipv6_mc_check_mld(struct sk_buff *skb);void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp);
bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, const struct in6_addr *src_addr);
void ipv6_mc_dad_complete(struct inet6_dev *idev);
/* * identify MLD packets for MLD filter exceptions */static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset){ struct icmp6hdr *hdr;
if (nexthdr != IPPROTO_ICMPV6 || !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) return false;
hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
switch (hdr->icmp6_type) { case ICMPV6_MGM_QUERY: case ICMPV6_MGM_REPORT: case ICMPV6_MGM_REDUCTION: case ICMPV6_MLD2_REPORT: return true; default: break; } return false;}
void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao);
/* * anycast prototypes (anycast.c) */int ipv6_sock_ac_join(struct sock *sk, int ifindex, const struct in6_addr *addr);int ipv6_sock_ac_drop(struct sock *sk, int ifindex, const struct in6_addr *addr);void __ipv6_sock_ac_close(struct sock *sk);void ipv6_sock_ac_close(struct sock *sk);
int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);void ipv6_ac_destroy_dev(struct inet6_dev *idev);bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, const struct in6_addr *addr);bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, const struct in6_addr *addr);int ipv6_anycast_init(void);void ipv6_anycast_cleanup(void);
/* Device notifier */int register_inet6addr_notifier(struct notifier_block *nb);int unregister_inet6addr_notifier(struct notifier_block *nb);int inet6addr_notifier_call_chain(unsigned long val, void *v);
int register_inet6addr_validator_notifier(struct notifier_block *nb);int unregister_inet6addr_validator_notifier(struct notifier_block *nb);int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
void inet6_netconf_notify_devconf(struct net *net, int event, int type, int ifindex, struct ipv6_devconf *devconf);
/** * __in6_dev_get - get inet6_dev pointer from netdevice * @dev: network device * * Caller must hold rcu_read_lock or RTNL, because this function * does not take a reference on the inet6_dev. */static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev){ return rcu_dereference_rtnl(dev->ip6_ptr);}
static inline struct inet6_dev *in6_dev_rcu(const struct net_device *dev){ return rcu_dereference(dev->ip6_ptr);}
static inline struct inet6_dev *__in6_dev_get_rtnl_net(const struct net_device *dev){ return rtnl_net_dereference(dev_net(dev), dev->ip6_ptr);}
/** * __in6_dev_stats_get - get inet6_dev pointer for stats * @dev: network device * @skb: skb for original incoming interface if needed * * Caller must hold rcu_read_lock or RTNL, because this function * does not take a reference on the inet6_dev. */static inline struct inet6_dev *__in6_dev_stats_get(const struct net_device *dev, const struct sk_buff *skb){ if (netif_is_l3_master(dev)) { dev = dev_get_by_index_rcu(dev_net(dev), inet6_iif(skb)); if (!dev) return NULL; } return __in6_dev_get(dev);}
/** * __in6_dev_get_safely - get inet6_dev pointer from netdevice * @dev: network device * * This is a safer version of __in6_dev_get */static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev){ if (likely(dev)) return rcu_dereference_rtnl(dev->ip6_ptr); else return NULL;}
/** * in6_dev_get - get inet6_dev pointer from netdevice * @dev: network device * * This version can be used in any context, and takes a reference * on the inet6_dev. Callers must use in6_dev_put() later to * release this reference. */static inline struct inet6_dev *in6_dev_get(const struct net_device *dev){ struct inet6_dev *idev;
rcu_read_lock(); idev = rcu_dereference(dev->ip6_ptr); if (idev) refcount_inc(&idev->refcnt); rcu_read_unlock(); return idev;}
static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev){ struct inet6_dev *idev = __in6_dev_get(dev);
return idev ? idev->nd_parms : NULL;}
void in6_dev_finish_destroy(struct inet6_dev *idev);
static inline void in6_dev_put(struct inet6_dev *idev){ if (refcount_dec_and_test(&idev->refcnt)) in6_dev_finish_destroy(idev);}
static inline void in6_dev_put_clear(struct inet6_dev **pidev){ struct inet6_dev *idev = *pidev;
if (idev) { in6_dev_put(idev); *pidev = NULL; }}
static inline void __in6_dev_put(struct inet6_dev *idev){ refcount_dec(&idev->refcnt);}
static inline void in6_dev_hold(struct inet6_dev *idev){ refcount_inc(&idev->refcnt);}
static inline bool in6_dev_hold_safe(struct inet6_dev *idev){ return refcount_inc_not_zero(&idev->refcnt);}
/* called with rcu_read_lock held */static inline bool ip6_ignore_linkdown(const struct net_device *dev){ const struct inet6_dev *idev = __in6_dev_get(dev);
if (unlikely(!idev)) return true;
return !!READ_ONCE(idev->cnf.ignore_routes_with_linkdown);}
void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
static inline void in6_ifa_put(struct inet6_ifaddr *ifp){ if (refcount_dec_and_test(&ifp->refcnt)) inet6_ifa_finish_destroy(ifp);}
static inline void __in6_ifa_put(struct inet6_ifaddr *ifp){ refcount_dec(&ifp->refcnt);}
static inline void in6_ifa_hold(struct inet6_ifaddr *ifp){ refcount_inc(&ifp->refcnt);}
static inline bool in6_ifa_hold_safe(struct inet6_ifaddr *ifp){ return refcount_inc_not_zero(&ifp->refcnt);}
/* * compute link-local solicited-node multicast address */
static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, struct in6_addr *solicited){ ipv6_addr_set(solicited, htonl(0xFF020000), 0, htonl(0x1), htonl(0xFF000000) | addr->s6_addr32[3]);}
static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr){#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 __be64 *p = (__force __be64 *)addr; return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;#else return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | addr->s6_addr32[1] | addr->s6_addr32[2] | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;#endif}
static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr){#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 __be64 *p = (__force __be64 *)addr; return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;#else return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | addr->s6_addr32[1] | addr->s6_addr32[2] | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;#endif}
static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr){ return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);}
static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr){#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 __be64 *p = (__force __be64 *)addr; return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & cpu_to_be64(0xffffffffff000000UL))) == 0UL;#else return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | addr->s6_addr32[1] | (addr->s6_addr32[2] ^ htonl(0x00000001)) | (addr->s6_addr[12] ^ 0xff)) == 0;#endif}
static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr){#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 __be64 *p = (__force __be64 *)addr;
return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(0x6a))) == 0UL;#else return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | addr->s6_addr32[1] | addr->s6_addr32[2] | (addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;#endif}
#ifdef CONFIG_PROC_FSint if6_proc_init(void);void if6_proc_exit(void);#endif
int inet6_fill_ifmcaddr(struct sk_buff *skb, const struct ifmcaddr6 *ifmca, struct inet6_fill_args *args);
int inet6_fill_ifacaddr(struct sk_buff *skb, const struct ifacaddr6 *ifaca, struct inet6_fill_args *args);#endif