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504 lines
14 KiB
504 lines
14 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ADDRCONF_H |
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#define _ADDRCONF_H |
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#define MAX_RTR_SOLICITATIONS -1 /* unlimited */ |
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#define RTR_SOLICITATION_INTERVAL (4*HZ) |
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#define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */ |
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#define TEMP_VALID_LIFETIME (7*86400) |
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#define TEMP_PREFERRED_LIFETIME (86400) |
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#define REGEN_MAX_RETRY (3) |
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#define MAX_DESYNC_FACTOR (600) |
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#define ADDR_CHECK_FREQUENCY (120*HZ) |
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#define IPV6_MAX_ADDRESSES 16 |
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#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1) |
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#define ADDRCONF_TIMER_FUZZ (HZ / 4) |
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#define ADDRCONF_TIMER_FUZZ_MAX (HZ) |
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#define ADDRCONF_NOTIFY_PRIORITY 0 |
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#include <linux/in.h> |
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#include <linux/in6.h> |
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struct prefix_info { |
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__u8 type; |
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__u8 length; |
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__u8 prefix_len; |
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#if defined(__BIG_ENDIAN_BITFIELD) |
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__u8 onlink : 1, |
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autoconf : 1, |
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reserved : 6; |
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#elif defined(__LITTLE_ENDIAN_BITFIELD) |
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__u8 reserved : 6, |
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autoconf : 1, |
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onlink : 1; |
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#else |
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#error "Please fix <asm/byteorder.h>" |
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#endif |
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__be32 valid; |
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__be32 prefered; |
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__be32 reserved2; |
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struct in6_addr prefix; |
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}; |
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#include <linux/ipv6.h> |
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#include <linux/netdevice.h> |
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#include <net/if_inet6.h> |
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#include <net/ipv6.h> |
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struct in6_validator_info { |
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struct in6_addr i6vi_addr; |
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struct inet6_dev *i6vi_dev; |
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struct netlink_ext_ack *extack; |
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}; |
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struct ifa6_config { |
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const struct in6_addr *pfx; |
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unsigned int plen; |
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const struct in6_addr *peer_pfx; |
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u32 rt_priority; |
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u32 ifa_flags; |
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u32 preferred_lft; |
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u32 valid_lft; |
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u16 scope; |
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}; |
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int addrconf_init(void); |
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void addrconf_cleanup(void); |
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int addrconf_add_ifaddr(struct net *net, void __user *arg); |
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int addrconf_del_ifaddr(struct net *net, void __user *arg); |
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int addrconf_set_dstaddr(struct net *net, void __user *arg); |
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int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
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const struct net_device *dev, int strict); |
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int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, |
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const struct net_device *dev, bool skip_dev_check, |
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int strict, u32 banned_flags); |
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#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
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int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
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#endif |
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int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs, |
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unsigned char nsegs); |
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bool ipv6_chk_custom_prefix(const struct in6_addr *addr, |
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const unsigned int prefix_len, |
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struct net_device *dev); |
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int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
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struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr, |
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struct net_device *dev); |
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struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, |
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const struct in6_addr *addr, |
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struct net_device *dev, int strict); |
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int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, |
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const struct in6_addr *daddr, unsigned int srcprefs, |
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struct in6_addr *saddr); |
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int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
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u32 banned_flags); |
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int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
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u32 banned_flags); |
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bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2, |
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bool match_wildcard); |
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bool inet_rcv_saddr_any(const struct sock *sk); |
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void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); |
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void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); |
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void addrconf_add_linklocal(struct inet6_dev *idev, |
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const struct in6_addr *addr, u32 flags); |
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int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
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const struct prefix_info *pinfo, |
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struct inet6_dev *in6_dev, |
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const struct in6_addr *addr, int addr_type, |
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u32 addr_flags, bool sllao, bool tokenized, |
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__u32 valid_lft, u32 prefered_lft); |
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static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr) |
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{ |
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memcpy(eui, addr, 3); |
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eui[3] = 0xFF; |
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eui[4] = 0xFE; |
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memcpy(eui + 5, addr + 3, 3); |
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} |
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static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) |
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{ |
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addrconf_addr_eui48_base(eui, addr); |
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eui[0] ^= 2; |
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} |
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static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
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{ |
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if (dev->addr_len != ETH_ALEN) |
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return -1; |
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/* |
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* The zSeries OSA network cards can be shared among various |
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* OS instances, but the OSA cards have only one MAC address. |
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* This leads to duplicate address conflicts in conjunction |
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* with IPv6 if more than one instance uses the same card. |
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* |
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* The driver for these cards can deliver a unique 16-bit |
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* identifier for each instance sharing the same card. It is |
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* placed instead of 0xFFFE in the interface identifier. The |
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* "u" bit of the interface identifier is not inverted in this |
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* case. Hence the resulting interface identifier has local |
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* scope according to RFC2373. |
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*/ |
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addrconf_addr_eui48_base(eui, dev->dev_addr); |
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if (dev->dev_id) { |
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eui[3] = (dev->dev_id >> 8) & 0xFF; |
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eui[4] = dev->dev_id & 0xFF; |
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} else { |
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eui[0] ^= 2; |
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} |
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return 0; |
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} |
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static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
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unsigned int unit) |
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{ |
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if (timeout == 0xffffffff) |
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return ~0UL; |
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/* |
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* Avoid arithmetic overflow. |
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* Assuming unit is constant and non-zero, this "if" statement |
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* will go away on 64bit archs. |
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*/ |
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if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) |
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return LONG_MAX / unit; |
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return timeout; |
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} |
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static inline int addrconf_finite_timeout(unsigned long timeout) |
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{ |
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return ~timeout; |
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} |
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/* |
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* IPv6 Address Label subsystem (addrlabel.c) |
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*/ |
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int ipv6_addr_label_init(void); |
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void ipv6_addr_label_cleanup(void); |
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int ipv6_addr_label_rtnl_register(void); |
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u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, |
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int type, int ifindex); |
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/* |
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* multicast prototypes (mcast.c) |
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*/ |
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static inline bool ipv6_mc_may_pull(struct sk_buff *skb, |
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unsigned int len) |
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{ |
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if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len) |
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return false; |
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return pskb_may_pull(skb, len); |
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} |
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int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
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const struct in6_addr *addr); |
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int ipv6_sock_mc_drop(struct sock *sk, int ifindex, |
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const struct in6_addr *addr); |
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void __ipv6_sock_mc_close(struct sock *sk); |
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void ipv6_sock_mc_close(struct sock *sk); |
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bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
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const struct in6_addr *src_addr); |
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int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); |
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int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
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int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); |
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void ipv6_mc_up(struct inet6_dev *idev); |
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void ipv6_mc_down(struct inet6_dev *idev); |
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void ipv6_mc_unmap(struct inet6_dev *idev); |
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void ipv6_mc_remap(struct inet6_dev *idev); |
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void ipv6_mc_init_dev(struct inet6_dev *idev); |
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void ipv6_mc_destroy_dev(struct inet6_dev *idev); |
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int ipv6_mc_check_mld(struct sk_buff *skb); |
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void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp); |
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bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
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const struct in6_addr *src_addr); |
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void ipv6_mc_dad_complete(struct inet6_dev *idev); |
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/* |
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* identify MLD packets for MLD filter exceptions |
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*/ |
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static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) |
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{ |
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struct icmp6hdr *hdr; |
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if (nexthdr != IPPROTO_ICMPV6 || |
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!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) |
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return false; |
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hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); |
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switch (hdr->icmp6_type) { |
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case ICMPV6_MGM_QUERY: |
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case ICMPV6_MGM_REPORT: |
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case ICMPV6_MGM_REDUCTION: |
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case ICMPV6_MLD2_REPORT: |
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return true; |
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default: |
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break; |
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} |
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return false; |
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} |
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void addrconf_prefix_rcv(struct net_device *dev, |
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u8 *opt, int len, bool sllao); |
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/* |
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* anycast prototypes (anycast.c) |
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*/ |
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int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
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const struct in6_addr *addr); |
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int ipv6_sock_ac_drop(struct sock *sk, int ifindex, |
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const struct in6_addr *addr); |
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void __ipv6_sock_ac_close(struct sock *sk); |
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void ipv6_sock_ac_close(struct sock *sk); |
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int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr); |
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int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); |
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void ipv6_ac_destroy_dev(struct inet6_dev *idev); |
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bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, |
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const struct in6_addr *addr); |
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bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev, |
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const struct in6_addr *addr); |
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int ipv6_anycast_init(void); |
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void ipv6_anycast_cleanup(void); |
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/* Device notifier */ |
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int register_inet6addr_notifier(struct notifier_block *nb); |
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int unregister_inet6addr_notifier(struct notifier_block *nb); |
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int inet6addr_notifier_call_chain(unsigned long val, void *v); |
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int register_inet6addr_validator_notifier(struct notifier_block *nb); |
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int unregister_inet6addr_validator_notifier(struct notifier_block *nb); |
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int inet6addr_validator_notifier_call_chain(unsigned long val, void *v); |
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void inet6_netconf_notify_devconf(struct net *net, int event, int type, |
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int ifindex, struct ipv6_devconf *devconf); |
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/** |
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* __in6_dev_get - get inet6_dev pointer from netdevice |
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* @dev: network device |
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* |
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* Caller must hold rcu_read_lock or RTNL, because this function |
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* does not take a reference on the inet6_dev. |
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*/ |
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static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) |
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{ |
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return rcu_dereference_rtnl(dev->ip6_ptr); |
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} |
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/** |
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* __in6_dev_stats_get - get inet6_dev pointer for stats |
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* @dev: network device |
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* @skb: skb for original incoming interface if neeeded |
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* |
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* Caller must hold rcu_read_lock or RTNL, because this function |
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* does not take a reference on the inet6_dev. |
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*/ |
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static inline struct inet6_dev *__in6_dev_stats_get(const struct net_device *dev, |
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const struct sk_buff *skb) |
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{ |
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if (netif_is_l3_master(dev)) |
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dev = dev_get_by_index_rcu(dev_net(dev), inet6_iif(skb)); |
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return __in6_dev_get(dev); |
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} |
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/** |
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* __in6_dev_get_safely - get inet6_dev pointer from netdevice |
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* @dev: network device |
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* |
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* This is a safer version of __in6_dev_get |
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*/ |
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static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev) |
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{ |
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if (likely(dev)) |
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return rcu_dereference_rtnl(dev->ip6_ptr); |
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else |
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return NULL; |
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} |
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/** |
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* in6_dev_get - get inet6_dev pointer from netdevice |
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* @dev: network device |
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* |
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* This version can be used in any context, and takes a reference |
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* on the inet6_dev. Callers must use in6_dev_put() later to |
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* release this reference. |
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*/ |
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static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) |
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{ |
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struct inet6_dev *idev; |
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rcu_read_lock(); |
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idev = rcu_dereference(dev->ip6_ptr); |
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if (idev) |
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refcount_inc(&idev->refcnt); |
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rcu_read_unlock(); |
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return idev; |
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} |
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static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev) |
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{ |
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struct inet6_dev *idev = __in6_dev_get(dev); |
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return idev ? idev->nd_parms : NULL; |
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} |
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void in6_dev_finish_destroy(struct inet6_dev *idev); |
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static inline void in6_dev_put(struct inet6_dev *idev) |
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{ |
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if (refcount_dec_and_test(&idev->refcnt)) |
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in6_dev_finish_destroy(idev); |
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} |
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static inline void in6_dev_put_clear(struct inet6_dev **pidev) |
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{ |
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struct inet6_dev *idev = *pidev; |
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if (idev) { |
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in6_dev_put(idev); |
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*pidev = NULL; |
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} |
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} |
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static inline void __in6_dev_put(struct inet6_dev *idev) |
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{ |
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refcount_dec(&idev->refcnt); |
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} |
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static inline void in6_dev_hold(struct inet6_dev *idev) |
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{ |
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refcount_inc(&idev->refcnt); |
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} |
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/* called with rcu_read_lock held */ |
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static inline bool ip6_ignore_linkdown(const struct net_device *dev) |
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{ |
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const struct inet6_dev *idev = __in6_dev_get(dev); |
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return !!idev->cnf.ignore_routes_with_linkdown; |
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} |
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void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
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static inline void in6_ifa_put(struct inet6_ifaddr *ifp) |
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{ |
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if (refcount_dec_and_test(&ifp->refcnt)) |
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inet6_ifa_finish_destroy(ifp); |
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} |
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static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
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{ |
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refcount_dec(&ifp->refcnt); |
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} |
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static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
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{ |
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refcount_inc(&ifp->refcnt); |
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} |
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/* |
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* compute link-local solicited-node multicast address |
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*/ |
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static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, |
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struct in6_addr *solicited) |
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{ |
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ipv6_addr_set(solicited, |
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htonl(0xFF020000), 0, |
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htonl(0x1), |
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htonl(0xFF000000) | addr->s6_addr32[3]); |
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} |
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static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
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{ |
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#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
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__be64 *p = (__force __be64 *)addr; |
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return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; |
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#else |
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return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
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addr->s6_addr32[1] | addr->s6_addr32[2] | |
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(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
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#endif |
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} |
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static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
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{ |
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#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
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__be64 *p = (__force __be64 *)addr; |
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return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; |
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#else |
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return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
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addr->s6_addr32[1] | addr->s6_addr32[2] | |
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(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
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#endif |
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} |
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static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
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{ |
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return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
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} |
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static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
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{ |
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#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
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__be64 *p = (__force __be64 *)addr; |
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return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
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((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & |
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cpu_to_be64(0xffffffffff000000UL))) == 0UL; |
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#else |
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return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
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addr->s6_addr32[1] | |
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(addr->s6_addr32[2] ^ htonl(0x00000001)) | |
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(addr->s6_addr[12] ^ 0xff)) == 0; |
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#endif |
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} |
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static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr) |
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{ |
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#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
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__be64 *p = (__force __be64 *)addr; |
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return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | |
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(p[1] ^ cpu_to_be64(0x6a))) == 0UL; |
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#else |
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return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
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addr->s6_addr32[1] | addr->s6_addr32[2] | |
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(addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0; |
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#endif |
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} |
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#ifdef CONFIG_PROC_FS |
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int if6_proc_init(void); |
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void if6_proc_exit(void); |
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#endif |
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#endif
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