Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ADDRCONF_H |
| 2 | #define _ADDRCONF_H |
| 3 | |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 4 | #define MAX_RTR_SOLICITATIONS -1 /* unlimited */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #define RTR_SOLICITATION_INTERVAL (4*HZ) |
Maciej Żenczykowski | bd11f07 | 2016-09-27 23:57:58 -0700 | [diff] [blame] | 6 | #define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | |
| 8 | #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ |
| 9 | |
| 10 | #define TEMP_VALID_LIFETIME (7*86400) |
| 11 | #define TEMP_PREFERRED_LIFETIME (86400) |
Lorenzo Colitti | 76f793e | 2011-07-26 13:50:49 +0000 | [diff] [blame] | 12 | #define REGEN_MAX_RETRY (3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #define MAX_DESYNC_FACTOR (600) |
| 14 | |
| 15 | #define ADDR_CHECK_FREQUENCY (120*HZ) |
| 16 | |
| 17 | #define IPV6_MAX_ADDRESSES 16 |
| 18 | |
Jiri Pirko | 5c766d6 | 2013-01-24 09:41:41 +0000 | [diff] [blame] | 19 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1) |
| 20 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) |
| 21 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) |
| 22 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 23 | #include <linux/in.h> |
Patrick McHardy | 6a800d4 | 2005-05-03 22:17:18 -0700 | [diff] [blame] | 24 | #include <linux/in6.h> |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | struct prefix_info { |
| 27 | __u8 type; |
| 28 | __u8 length; |
| 29 | __u8 prefix_len; |
| 30 | |
| 31 | #if defined(__BIG_ENDIAN_BITFIELD) |
| 32 | __u8 onlink : 1, |
| 33 | autoconf : 1, |
| 34 | reserved : 6; |
| 35 | #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| 36 | __u8 reserved : 6, |
| 37 | autoconf : 1, |
| 38 | onlink : 1; |
| 39 | #else |
| 40 | #error "Please fix <asm/byteorder.h>" |
| 41 | #endif |
Al Viro | e69a4adc | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 42 | __be32 valid; |
| 43 | __be32 prefered; |
| 44 | __be32 reserved2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | struct in6_addr prefix; |
| 47 | }; |
| 48 | |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/netdevice.h> |
| 51 | #include <net/if_inet6.h> |
Herbert Xu | e4553ed | 2005-05-03 14:25:13 -0700 | [diff] [blame] | 52 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Eric Dumazet | ddbe503 | 2012-07-18 08:11:12 +0000 | [diff] [blame] | 54 | #define IN6_ADDR_HSIZE_SHIFT 4 |
| 55 | #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 57 | int addrconf_init(void); |
| 58 | void addrconf_cleanup(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 60 | int addrconf_add_ifaddr(struct net *net, void __user *arg); |
| 61 | int addrconf_del_ifaddr(struct net *net, void __user *arg); |
| 62 | int addrconf_set_dstaddr(struct net *net, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 64 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
| 65 | const struct net_device *dev, int strict); |
Erik Kline | c58da4c | 2015-02-04 20:01:23 +0900 | [diff] [blame] | 66 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, |
| 67 | const struct net_device *dev, int strict, |
| 68 | u32 banned_flags); |
Daniel Lezcano | bfeade0 | 2008-01-10 22:43:18 -0800 | [diff] [blame] | 69 | |
Masahide NAKAMURA | 59fbb3a6 | 2007-06-26 23:56:32 -0700 | [diff] [blame] | 70 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 71 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
Masahide NAKAMURA | 65d4ed9 | 2006-08-23 19:16:22 -0700 | [diff] [blame] | 72 | #endif |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 73 | |
Catalin\(ux\) M. BOIE | 7df37ff | 2013-09-23 23:04:19 +0300 | [diff] [blame] | 74 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
| 75 | const unsigned int prefix_len, |
| 76 | struct net_device *dev); |
| 77 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 78 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 79 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 80 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, |
| 81 | const struct in6_addr *addr, |
| 82 | struct net_device *dev, int strict); |
Daniel Lezcano | 1cab3da | 2008-01-10 22:44:09 -0800 | [diff] [blame] | 83 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 84 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, |
| 85 | const struct in6_addr *daddr, unsigned int srcprefs, |
| 86 | struct in6_addr *saddr); |
| 87 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 88 | u32 banned_flags); |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 89 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
Jiri Pirko | 479840f | 2013-12-06 09:45:21 +0100 | [diff] [blame] | 90 | u32 banned_flags); |
Craig Gallek | a583636 | 2016-02-10 11:50:38 -0500 | [diff] [blame] | 91 | int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
| 92 | bool match_wildcard); |
Craig Gallek | e32ea7e | 2016-01-04 17:41:46 -0500 | [diff] [blame] | 93 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
| 94 | bool match_wildcard); |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 95 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); |
| 96 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Alexander Aring | 2ad3ed5 | 2016-06-15 21:20:17 +0200 | [diff] [blame] | 98 | void addrconf_add_linklocal(struct inet6_dev *idev, |
| 99 | const struct in6_addr *addr, u32 flags); |
| 100 | |
Alexander Aring | cc84b3c | 2016-06-15 21:20:24 +0200 | [diff] [blame] | 101 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
| 102 | const struct prefix_info *pinfo, |
| 103 | struct inet6_dev *in6_dev, |
| 104 | const struct in6_addr *addr, int addr_type, |
| 105 | u32 addr_flags, bool sllao, bool tokenized, |
| 106 | __u32 valid_lft, u32 prefered_lft); |
| 107 | |
Matan Barak | 399e6f9 | 2015-07-30 18:33:22 +0300 | [diff] [blame] | 108 | static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
| 109 | { |
| 110 | if (dev->addr_len != ETH_ALEN) |
| 111 | return -1; |
| 112 | memcpy(eui, dev->dev_addr, 3); |
| 113 | memcpy(eui + 5, dev->dev_addr + 3, 3); |
| 114 | |
| 115 | /* |
| 116 | * The zSeries OSA network cards can be shared among various |
| 117 | * OS instances, but the OSA cards have only one MAC address. |
| 118 | * This leads to duplicate address conflicts in conjunction |
| 119 | * with IPv6 if more than one instance uses the same card. |
| 120 | * |
| 121 | * The driver for these cards can deliver a unique 16-bit |
| 122 | * identifier for each instance sharing the same card. It is |
| 123 | * placed instead of 0xFFFE in the interface identifier. The |
| 124 | * "u" bit of the interface identifier is not inverted in this |
| 125 | * case. Hence the resulting interface identifier has local |
| 126 | * scope according to RFC2373. |
| 127 | */ |
| 128 | if (dev->dev_id) { |
| 129 | eui[3] = (dev->dev_id >> 8) & 0xFF; |
| 130 | eui[4] = dev->dev_id & 0xFF; |
| 131 | } else { |
| 132 | eui[3] = 0xFF; |
| 133 | eui[4] = 0xFE; |
| 134 | eui[0] ^= 2; |
| 135 | } |
| 136 | return 0; |
| 137 | } |
| 138 | |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 139 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 140 | unsigned int unit) |
YOSHIFUJI Hideaki | 4bed72e | 2008-05-27 17:37:49 +0900 | [diff] [blame] | 141 | { |
| 142 | if (timeout == 0xffffffff) |
| 143 | return ~0UL; |
| 144 | |
| 145 | /* |
| 146 | * Avoid arithmetic overflow. |
| 147 | * Assuming unit is constant and non-zero, this "if" statement |
| 148 | * will go away on 64bit archs. |
| 149 | */ |
| 150 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) |
| 151 | return LONG_MAX / unit; |
| 152 | |
| 153 | return timeout; |
| 154 | } |
| 155 | |
| 156 | static inline int addrconf_finite_timeout(unsigned long timeout) |
| 157 | { |
| 158 | return ~timeout; |
| 159 | } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | /* |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 162 | * IPv6 Address Label subsystem (addrlabel.c) |
| 163 | */ |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 164 | int ipv6_addr_label_init(void); |
| 165 | void ipv6_addr_label_cleanup(void); |
| 166 | void ipv6_addr_label_rtnl_register(void); |
| 167 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, |
| 168 | int type, int ifindex); |
YOSHIFUJI Hideaki | 2a8cc6c | 2007-11-14 15:56:23 +0900 | [diff] [blame] | 169 | |
| 170 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | * multicast prototypes (mcast.c) |
| 172 | */ |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 173 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
| 174 | const struct in6_addr *addr); |
| 175 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
| 176 | const struct in6_addr *addr); |
| 177 | void ipv6_sock_mc_close(struct sock *sk); |
| 178 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
| 179 | const struct in6_addr *src_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 181 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); |
| 182 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
| 183 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); |
| 184 | void ipv6_mc_up(struct inet6_dev *idev); |
| 185 | void ipv6_mc_down(struct inet6_dev *idev); |
| 186 | void ipv6_mc_unmap(struct inet6_dev *idev); |
| 187 | void ipv6_mc_remap(struct inet6_dev *idev); |
| 188 | void ipv6_mc_init_dev(struct inet6_dev *idev); |
| 189 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); |
Linus Lüssing | 9afd85c | 2015-05-02 14:01:07 +0200 | [diff] [blame] | 190 | int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed); |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 191 | void addrconf_dad_failure(struct inet6_ifaddr *ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 193 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
| 194 | const struct in6_addr *src_addr); |
YOSHIFUJI Hideaki / 吉藤英明 | daad151 | 2013-01-13 05:02:18 +0000 | [diff] [blame] | 195 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 196 | void ipv6_mc_dad_complete(struct inet6_dev *idev); |
Cong Wang | 5f81bd2 | 2013-08-31 13:44:30 +0800 | [diff] [blame] | 197 | |
| 198 | /* A stub used by vxlan module. This is ugly, ideally these |
| 199 | * symbols should be built into the core kernel. |
| 200 | */ |
| 201 | struct ipv6_stub { |
| 202 | int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, |
| 203 | const struct in6_addr *addr); |
| 204 | int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, |
| 205 | const struct in6_addr *addr); |
Roopa Prabhu | 343d60a | 2015-07-30 13:34:53 -0700 | [diff] [blame] | 206 | int (*ipv6_dst_lookup)(struct net *net, struct sock *sk, |
| 207 | struct dst_entry **dst, struct flowi6 *fl6); |
Cong Wang | 5f81bd2 | 2013-08-31 13:44:30 +0800 | [diff] [blame] | 208 | void (*udpv6_encap_enable)(void); |
Jiri Benc | 38cf595 | 2015-09-22 18:57:13 +0200 | [diff] [blame] | 209 | void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr, |
Cong Wang | f564f45 | 2013-08-31 13:44:36 +0800 | [diff] [blame] | 210 | const struct in6_addr *solicited_addr, |
| 211 | bool router, bool solicited, bool override, bool inc_opt); |
Cong Wang | e15a00a | 2013-08-31 13:44:34 +0800 | [diff] [blame] | 212 | struct neigh_table *nd_tbl; |
Cong Wang | 5f81bd2 | 2013-08-31 13:44:30 +0800 | [diff] [blame] | 213 | }; |
| 214 | extern const struct ipv6_stub *ipv6_stub __read_mostly; |
| 215 | |
YOSHIFUJI Hideaki / 吉藤英明 | daad151 | 2013-01-13 05:02:18 +0000 | [diff] [blame] | 216 | /* |
| 217 | * identify MLD packets for MLD filter exceptions |
| 218 | */ |
| 219 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) |
| 220 | { |
| 221 | struct icmp6hdr *hdr; |
| 222 | |
| 223 | if (nexthdr != IPPROTO_ICMPV6 || |
| 224 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) |
| 225 | return false; |
| 226 | |
| 227 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); |
| 228 | |
| 229 | switch (hdr->icmp6_type) { |
| 230 | case ICMPV6_MGM_QUERY: |
| 231 | case ICMPV6_MGM_REPORT: |
| 232 | case ICMPV6_MGM_REDUCTION: |
| 233 | case ICMPV6_MLD2_REPORT: |
| 234 | return true; |
| 235 | default: |
| 236 | break; |
| 237 | } |
| 238 | return false; |
| 239 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 241 | void addrconf_prefix_rcv(struct net_device *dev, |
| 242 | u8 *opt, int len, bool sllao); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | /* |
| 245 | * anycast prototypes (anycast.c) |
| 246 | */ |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 247 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
| 248 | const struct in6_addr *addr); |
| 249 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, |
| 250 | const struct in6_addr *addr); |
| 251 | void ipv6_sock_ac_close(struct sock *sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
WANG Cong | 013b4d9 | 2014-09-11 15:35:11 -0700 | [diff] [blame] | 253 | int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr); |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 254 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
Sabrina Dubroca | 381f4dc | 2014-09-10 23:23:02 +0200 | [diff] [blame] | 255 | void ipv6_ac_destroy_dev(struct inet6_dev *idev); |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 256 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
FX Le Bail | 7c90cc2 | 2014-01-22 07:42:37 +0100 | [diff] [blame] | 257 | const struct in6_addr *addr); |
| 258 | bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, |
| 259 | const struct in6_addr *addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | /* Device notifier */ |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 262 | int register_inet6addr_notifier(struct notifier_block *nb); |
| 263 | int unregister_inet6addr_notifier(struct notifier_block *nb); |
| 264 | int inet6addr_notifier_call_chain(unsigned long val, void *v); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 266 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
| 267 | struct ipv6_devconf *devconf); |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 268 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 269 | /** |
| 270 | * __in6_dev_get - get inet6_dev pointer from netdevice |
| 271 | * @dev: network device |
| 272 | * |
| 273 | * Caller must hold rcu_read_lock or RTNL, because this function |
| 274 | * does not take a reference on the inet6_dev. |
| 275 | */ |
| 276 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 278 | return rcu_dereference_rtnl(dev->ip6_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 281 | /** |
| 282 | * in6_dev_get - get inet6_dev pointer from netdevice |
| 283 | * @dev: network device |
| 284 | * |
| 285 | * This version can be used in any context, and takes a reference |
| 286 | * on the inet6_dev. Callers must use in6_dev_put() later to |
| 287 | * release this reference. |
| 288 | */ |
| 289 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 291 | struct inet6_dev *idev; |
| 292 | |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 293 | rcu_read_lock(); |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 294 | idev = rcu_dereference(dev->ip6_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | if (idev) |
| 296 | atomic_inc(&idev->refcnt); |
YOSHIFUJI Hideaki | 8814c4b | 2006-09-22 14:44:24 -0700 | [diff] [blame] | 297 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | return idev; |
| 299 | } |
| 300 | |
Jiri Pirko | bba2489 | 2013-12-07 19:26:57 +0100 | [diff] [blame] | 301 | static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) |
| 302 | { |
| 303 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 304 | |
| 305 | return idev ? idev->nd_parms : NULL; |
| 306 | } |
| 307 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 308 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 310 | static inline void in6_dev_put(struct inet6_dev *idev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
| 312 | if (atomic_dec_and_test(&idev->refcnt)) |
| 313 | in6_dev_finish_destroy(idev); |
| 314 | } |
| 315 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 316 | static inline void __in6_dev_put(struct inet6_dev *idev) |
| 317 | { |
| 318 | atomic_dec(&idev->refcnt); |
| 319 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 321 | static inline void in6_dev_hold(struct inet6_dev *idev) |
| 322 | { |
| 323 | atomic_inc(&idev->refcnt); |
| 324 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 326 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
| 328 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) |
| 329 | { |
| 330 | if (atomic_dec_and_test(&ifp->refcnt)) |
| 331 | inet6_ifa_finish_destroy(ifp); |
| 332 | } |
| 333 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 334 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
| 335 | { |
| 336 | atomic_dec(&ifp->refcnt); |
| 337 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 339 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
| 340 | { |
| 341 | atomic_inc(&ifp->refcnt); |
| 342 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
| 345 | /* |
| 346 | * compute link-local solicited-node multicast address |
| 347 | */ |
| 348 | |
| 349 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, |
| 350 | struct in6_addr *solicited) |
| 351 | { |
| 352 | ipv6_addr_set(solicited, |
YOSHIFUJI Hideaki | 0e7b8dc | 2008-02-28 17:03:12 +0900 | [diff] [blame] | 353 | htonl(0xFF020000), 0, |
| 354 | htonl(0x1), |
| 355 | htonl(0xFF000000) | addr->s6_addr32[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } |
| 357 | |
YOSHIFUJI Hideaki | b27b28c | 2013-01-21 02:38:38 +0900 | [diff] [blame] | 358 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | { |
YOSHIFUJI Hideaki / 吉藤英明 | d164156 | 2013-01-20 07:38:52 +0000 | [diff] [blame] | 360 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
Bjørn Mork | bc86195 | 2014-02-27 14:20:29 +0100 | [diff] [blame] | 361 | __be64 *p = (__be64 *)addr; |
YOSHIFUJI Hideaki / 吉藤英明 | d164156 | 2013-01-20 07:38:52 +0000 | [diff] [blame] | 362 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
| 363 | #else |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 364 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
YOSHIFUJI Hideaki | fed85383 | 2008-04-11 20:17:55 +0900 | [diff] [blame] | 365 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 366 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
YOSHIFUJI Hideaki / 吉藤英明 | d164156 | 2013-01-20 07:38:52 +0000 | [diff] [blame] | 367 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
| 369 | |
YOSHIFUJI Hideaki | b27b28c | 2013-01-21 02:38:38 +0900 | [diff] [blame] | 370 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
YOSHIFUJI Hideaki / 吉藤英明 | d164156 | 2013-01-20 07:38:52 +0000 | [diff] [blame] | 372 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
Bjørn Mork | bc86195 | 2014-02-27 14:20:29 +0100 | [diff] [blame] | 373 | __be64 *p = (__be64 *)addr; |
YOSHIFUJI Hideaki / 吉藤英明 | d164156 | 2013-01-20 07:38:52 +0000 | [diff] [blame] | 374 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
| 375 | #else |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 376 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
YOSHIFUJI Hideaki | fed85383 | 2008-04-11 20:17:55 +0900 | [diff] [blame] | 377 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 378 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
YOSHIFUJI Hideaki / 吉藤英明 | d164156 | 2013-01-20 07:38:52 +0000 | [diff] [blame] | 379 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
YOSHIFUJI Hideaki | b27b28c | 2013-01-21 02:38:38 +0900 | [diff] [blame] | 382 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 383 | { |
Eric Dumazet | 48daa3b | 2010-09-21 06:57:39 +0000 | [diff] [blame] | 384 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 385 | } |
| 386 | |
YOSHIFUJI Hideaki / 吉藤英明 | ca97a64 | 2013-01-20 07:39:00 +0000 | [diff] [blame] | 387 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
| 388 | { |
YOSHIFUJI Hideaki / 吉藤英明 | 9d10077 | 2013-01-20 07:39:07 +0000 | [diff] [blame] | 389 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
Bjørn Mork | bc86195 | 2014-02-27 14:20:29 +0100 | [diff] [blame] | 390 | __be64 *p = (__be64 *)addr; |
YOSHIFUJI Hideaki / 吉藤英明 | 9d10077 | 2013-01-20 07:39:07 +0000 | [diff] [blame] | 391 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
| 392 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & |
| 393 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; |
| 394 | #else |
| 395 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
| 396 | addr->s6_addr32[1] | |
| 397 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | |
| 398 | (addr->s6_addr[12] ^ 0xff)) == 0; |
| 399 | #endif |
YOSHIFUJI Hideaki / 吉藤英明 | ca97a64 | 2013-01-20 07:39:00 +0000 | [diff] [blame] | 400 | } |
| 401 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 402 | #ifdef CONFIG_PROC_FS |
Joe Perches | e8e54d3 | 2013-07-31 17:31:32 -0700 | [diff] [blame] | 403 | int if6_proc_init(void); |
| 404 | void if6_proc_exit(void); |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 405 | #endif |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | #endif |