| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ADDRCONF_H |
| #define _ADDRCONF_H |
| |
| #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 */ |
| |
| #define TEMP_VALID_LIFETIME (7*86400) |
| #define TEMP_PREFERRED_LIFETIME (86400) |
| #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; |
| |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| __u8 onlink : 1, |
| autoconf : 1, |
| reserved : 6; |
| #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| __u8 reserved : 6, |
| autoconf : 1, |
| onlink : 1; |
| #else |
| #error "Please fix <asm/byteorder.h>" |
| #endif |
| __be32 valid; |
| __be32 prefered; |
| __be32 reserved2; |
| |
| struct in6_addr prefix; |
| }; |
| |
| #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; |
| |
| const struct in6_addr *peer_pfx; |
| |
| u32 rt_priority; |
| u32 ifa_flags; |
| u32 preferred_lft; |
| u32 valid_lft; |
| u16 scope; |
| }; |
| |
| 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 |
| |
| 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 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 inet6_dev *idev, struct in6_addr *addr, |
| u32 banned_flags); |
| 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; |
| } |
| |
| static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
| unsigned int unit) |
| { |
| if (timeout == 0xffffffff) |
| 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(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_icmpv6(struct sk_buff *skb); |
| 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); |
| |
| 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); |
| } |
| |
| /** |
| * __in6_dev_stats_get - get inet6_dev pointer for stats |
| * @dev: network device |
| * @skb: skb for original incoming interface if neeeded |
| * |
| * 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)); |
| 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); |
| } |
| |
| /* 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); |
| |
| return !!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); |
| } |
| |
| |
| /* |
| * 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 = (__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 = (__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 = (__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 = (__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_FS |
| int if6_proc_init(void); |
| void if6_proc_exit(void); |
| #endif |
| |
| #endif |