485 lines
13 KiB
C
485 lines
13 KiB
C
/* 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 int ipv6_mc_may_pull(struct sk_buff *skb,
|
|
unsigned int len)
|
|
{
|
|
if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
|
|
return -EINVAL;
|
|
|
|
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_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
|