/*
|
/*
|
* Anycast support for IPv6
|
* Anycast support for IPv6
|
* Linux INET6 implementation
|
* Linux INET6 implementation
|
*
|
*
|
* Authors:
|
* Authors:
|
* David L Stevens (dlstevens@us.ibm.com)
|
* David L Stevens (dlstevens@us.ibm.com)
|
*
|
*
|
* based heavily on net/ipv6/mcast.c
|
* based heavily on net/ipv6/mcast.c
|
*
|
*
|
* This program is free software; you can redistribute it and/or
|
* This program is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
* as published by the Free Software Foundation; either version
|
* as published by the Free Software Foundation; either version
|
* 2 of the License, or (at your option) any later version.
|
* 2 of the License, or (at your option) any later version.
|
*/
|
*/
|
|
|
#include <linux/config.h>
|
#include <linux/config.h>
|
#include <linux/module.h>
|
#include <linux/module.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/types.h>
|
#include <linux/types.h>
|
#include <linux/random.h>
|
#include <linux/random.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/socket.h>
|
#include <linux/socket.h>
|
#include <linux/sockios.h>
|
#include <linux/sockios.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/net.h>
|
#include <linux/net.h>
|
#include <linux/in6.h>
|
#include <linux/in6.h>
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/if_arp.h>
|
#include <linux/if_arp.h>
|
#include <linux/route.h>
|
#include <linux/route.h>
|
#include <linux/init.h>
|
#include <linux/init.h>
|
#include <linux/proc_fs.h>
|
#include <linux/proc_fs.h>
|
|
|
#include <net/sock.h>
|
#include <net/sock.h>
|
#include <net/snmp.h>
|
#include <net/snmp.h>
|
|
|
#include <net/ipv6.h>
|
#include <net/ipv6.h>
|
#include <net/protocol.h>
|
#include <net/protocol.h>
|
#include <net/if_inet6.h>
|
#include <net/if_inet6.h>
|
#include <net/ndisc.h>
|
#include <net/ndisc.h>
|
#include <net/addrconf.h>
|
#include <net/addrconf.h>
|
#include <net/ip6_route.h>
|
#include <net/ip6_route.h>
|
|
|
#include <net/checksum.h>
|
#include <net/checksum.h>
|
|
|
/* Big ac list lock for all the sockets */
|
/* Big ac list lock for all the sockets */
|
static rwlock_t ipv6_sk_ac_lock = RW_LOCK_UNLOCKED;
|
static rwlock_t ipv6_sk_ac_lock = RW_LOCK_UNLOCKED;
|
|
|
/* XXX ip6_addr_match() and ip6_onlink() really belong in net/core.c */
|
/* XXX ip6_addr_match() and ip6_onlink() really belong in net/core.c */
|
|
|
static int
|
static int
|
ip6_addr_match(struct in6_addr *addr1, struct in6_addr *addr2, int prefix)
|
ip6_addr_match(struct in6_addr *addr1, struct in6_addr *addr2, int prefix)
|
{
|
{
|
__u32 mask;
|
__u32 mask;
|
int i;
|
int i;
|
|
|
if (prefix > 128 || prefix < 0)
|
if (prefix > 128 || prefix < 0)
|
return 0;
|
return 0;
|
if (prefix == 0)
|
if (prefix == 0)
|
return 1;
|
return 1;
|
for (i=0; i<4; ++i) {
|
for (i=0; i<4; ++i) {
|
if (prefix >= 32)
|
if (prefix >= 32)
|
mask = ~0;
|
mask = ~0;
|
else
|
else
|
mask = htonl(~0 << (32 - prefix));
|
mask = htonl(~0 << (32 - prefix));
|
if ((addr1->s6_addr32[i] ^ addr2->s6_addr32[i]) & mask)
|
if ((addr1->s6_addr32[i] ^ addr2->s6_addr32[i]) & mask)
|
return 0;
|
return 0;
|
prefix -= 32;
|
prefix -= 32;
|
if (prefix <= 0)
|
if (prefix <= 0)
|
break;
|
break;
|
}
|
}
|
return 1;
|
return 1;
|
}
|
}
|
|
|
static int
|
static int
|
ip6_onlink(struct in6_addr *addr, struct net_device *dev)
|
ip6_onlink(struct in6_addr *addr, struct net_device *dev)
|
{
|
{
|
struct inet6_dev *idev;
|
struct inet6_dev *idev;
|
struct inet6_ifaddr *ifa;
|
struct inet6_ifaddr *ifa;
|
int onlink;
|
int onlink;
|
|
|
onlink = 0;
|
onlink = 0;
|
read_lock(&addrconf_lock);
|
read_lock(&addrconf_lock);
|
idev = __in6_dev_get(dev);
|
idev = __in6_dev_get(dev);
|
if (idev) {
|
if (idev) {
|
read_lock_bh(&idev->lock);
|
read_lock_bh(&idev->lock);
|
for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
|
for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
|
onlink = ip6_addr_match(addr, &ifa->addr,
|
onlink = ip6_addr_match(addr, &ifa->addr,
|
ifa->prefix_len);
|
ifa->prefix_len);
|
if (onlink)
|
if (onlink)
|
break;
|
break;
|
}
|
}
|
read_unlock_bh(&idev->lock);
|
read_unlock_bh(&idev->lock);
|
}
|
}
|
read_unlock(&addrconf_lock);
|
read_unlock(&addrconf_lock);
|
return onlink;
|
return onlink;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* socket join an anycast group
|
* socket join an anycast group
|
*/
|
*/
|
|
|
int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
|
int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
|
{
|
{
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
struct net_device *dev = NULL;
|
struct net_device *dev = NULL;
|
struct inet6_dev *idev;
|
struct inet6_dev *idev;
|
struct ipv6_ac_socklist *pac;
|
struct ipv6_ac_socklist *pac;
|
int ishost = !ipv6_devconf.forwarding;
|
int ishost = !ipv6_devconf.forwarding;
|
int err = 0;
|
int err = 0;
|
|
|
if (ipv6_addr_type(addr) & IPV6_ADDR_MULTICAST)
|
if (ipv6_addr_type(addr) & IPV6_ADDR_MULTICAST)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
pac = sock_kmalloc(sk, sizeof(struct ipv6_ac_socklist), GFP_KERNEL);
|
pac = sock_kmalloc(sk, sizeof(struct ipv6_ac_socklist), GFP_KERNEL);
|
if (pac == NULL)
|
if (pac == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
pac->acl_next = NULL;
|
pac->acl_next = NULL;
|
ipv6_addr_copy(&pac->acl_addr, addr);
|
ipv6_addr_copy(&pac->acl_addr, addr);
|
|
|
if (ifindex == 0) {
|
if (ifindex == 0) {
|
struct rt6_info *rt;
|
struct rt6_info *rt;
|
|
|
rt = rt6_lookup(addr, NULL, 0, 0);
|
rt = rt6_lookup(addr, NULL, 0, 0);
|
if (rt) {
|
if (rt) {
|
dev = rt->rt6i_dev;
|
dev = rt->rt6i_dev;
|
dev_hold(dev);
|
dev_hold(dev);
|
dst_release(&rt->u.dst);
|
dst_release(&rt->u.dst);
|
} else if (ishost) {
|
} else if (ishost) {
|
err = -EADDRNOTAVAIL;
|
err = -EADDRNOTAVAIL;
|
goto out_free_pac;
|
goto out_free_pac;
|
} else {
|
} else {
|
/* router, no matching interface: just pick one */
|
/* router, no matching interface: just pick one */
|
|
|
dev = dev_get_by_flags(IFF_UP, IFF_UP|IFF_LOOPBACK);
|
dev = dev_get_by_flags(IFF_UP, IFF_UP|IFF_LOOPBACK);
|
}
|
}
|
} else
|
} else
|
dev = dev_get_by_index(ifindex);
|
dev = dev_get_by_index(ifindex);
|
|
|
if (dev == NULL) {
|
if (dev == NULL) {
|
err = -ENODEV;
|
err = -ENODEV;
|
goto out_free_pac;
|
goto out_free_pac;
|
}
|
}
|
|
|
idev = in6_dev_get(dev);
|
idev = in6_dev_get(dev);
|
if (!idev) {
|
if (!idev) {
|
if (ifindex)
|
if (ifindex)
|
err = -ENODEV;
|
err = -ENODEV;
|
else
|
else
|
err = -EADDRNOTAVAIL;
|
err = -EADDRNOTAVAIL;
|
goto out_dev_put;
|
goto out_dev_put;
|
}
|
}
|
/* reset ishost, now that we have a specific device */
|
/* reset ishost, now that we have a specific device */
|
ishost = !idev->cnf.forwarding;
|
ishost = !idev->cnf.forwarding;
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
|
|
pac->acl_ifindex = dev->ifindex;
|
pac->acl_ifindex = dev->ifindex;
|
|
|
/* XXX
|
/* XXX
|
* For hosts, allow link-local or matching prefix anycasts.
|
* For hosts, allow link-local or matching prefix anycasts.
|
* This obviates the need for propagating anycast routes while
|
* This obviates the need for propagating anycast routes while
|
* still allowing some non-router anycast participation.
|
* still allowing some non-router anycast participation.
|
*
|
*
|
* allow anyone to join anycasts that don't require a special route
|
* allow anyone to join anycasts that don't require a special route
|
* and can't be spoofs of unicast addresses (reserved anycast only)
|
* and can't be spoofs of unicast addresses (reserved anycast only)
|
*/
|
*/
|
if (!ip6_onlink(addr, dev)) {
|
if (!ip6_onlink(addr, dev)) {
|
if (ishost)
|
if (ishost)
|
err = -EADDRNOTAVAIL;
|
err = -EADDRNOTAVAIL;
|
else if (!capable(CAP_NET_ADMIN))
|
else if (!capable(CAP_NET_ADMIN))
|
err = -EPERM;
|
err = -EPERM;
|
if (err)
|
if (err)
|
goto out_dev_put;
|
goto out_dev_put;
|
} else if (!(ipv6_addr_type(addr) & IPV6_ADDR_ANYCAST) &&
|
} else if (!(ipv6_addr_type(addr) & IPV6_ADDR_ANYCAST) &&
|
!capable(CAP_NET_ADMIN)) {
|
!capable(CAP_NET_ADMIN)) {
|
err = -EPERM;
|
err = -EPERM;
|
goto out_dev_put;
|
goto out_dev_put;
|
}
|
}
|
|
|
err = ipv6_dev_ac_inc(dev, addr);
|
err = ipv6_dev_ac_inc(dev, addr);
|
if (err)
|
if (err)
|
goto out_dev_put;
|
goto out_dev_put;
|
|
|
write_lock_bh(&ipv6_sk_ac_lock);
|
write_lock_bh(&ipv6_sk_ac_lock);
|
pac->acl_next = np->ipv6_ac_list;
|
pac->acl_next = np->ipv6_ac_list;
|
np->ipv6_ac_list = pac;
|
np->ipv6_ac_list = pac;
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
|
|
dev_put(dev);
|
dev_put(dev);
|
|
|
return 0;
|
return 0;
|
|
|
out_dev_put:
|
out_dev_put:
|
dev_put(dev);
|
dev_put(dev);
|
out_free_pac:
|
out_free_pac:
|
sock_kfree_s(sk, pac, sizeof(*pac));
|
sock_kfree_s(sk, pac, sizeof(*pac));
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* socket leave an anycast group
|
* socket leave an anycast group
|
*/
|
*/
|
int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
|
int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
|
{
|
{
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
struct net_device *dev;
|
struct net_device *dev;
|
struct ipv6_ac_socklist *pac, *prev_pac;
|
struct ipv6_ac_socklist *pac, *prev_pac;
|
|
|
write_lock_bh(&ipv6_sk_ac_lock);
|
write_lock_bh(&ipv6_sk_ac_lock);
|
prev_pac = 0;
|
prev_pac = 0;
|
for (pac = np->ipv6_ac_list; pac; pac = pac->acl_next) {
|
for (pac = np->ipv6_ac_list; pac; pac = pac->acl_next) {
|
if ((ifindex == 0 || pac->acl_ifindex == ifindex) &&
|
if ((ifindex == 0 || pac->acl_ifindex == ifindex) &&
|
ipv6_addr_cmp(&pac->acl_addr, addr) == 0)
|
ipv6_addr_cmp(&pac->acl_addr, addr) == 0)
|
break;
|
break;
|
prev_pac = pac;
|
prev_pac = pac;
|
}
|
}
|
if (!pac) {
|
if (!pac) {
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
return -ENOENT;
|
return -ENOENT;
|
}
|
}
|
if (prev_pac)
|
if (prev_pac)
|
prev_pac->acl_next = pac->acl_next;
|
prev_pac->acl_next = pac->acl_next;
|
else
|
else
|
np->ipv6_ac_list = pac->acl_next;
|
np->ipv6_ac_list = pac->acl_next;
|
|
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
|
|
dev = dev_get_by_index(pac->acl_ifindex);
|
dev = dev_get_by_index(pac->acl_ifindex);
|
if (dev) {
|
if (dev) {
|
ipv6_dev_ac_dec(dev, &pac->acl_addr);
|
ipv6_dev_ac_dec(dev, &pac->acl_addr);
|
dev_put(dev);
|
dev_put(dev);
|
}
|
}
|
sock_kfree_s(sk, pac, sizeof(*pac));
|
sock_kfree_s(sk, pac, sizeof(*pac));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
void ipv6_sock_ac_close(struct sock *sk)
|
void ipv6_sock_ac_close(struct sock *sk)
|
{
|
{
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
struct net_device *dev = 0;
|
struct net_device *dev = 0;
|
struct ipv6_ac_socklist *pac;
|
struct ipv6_ac_socklist *pac;
|
int prev_index;
|
int prev_index;
|
|
|
write_lock_bh(&ipv6_sk_ac_lock);
|
write_lock_bh(&ipv6_sk_ac_lock);
|
pac = np->ipv6_ac_list;
|
pac = np->ipv6_ac_list;
|
np->ipv6_ac_list = 0;
|
np->ipv6_ac_list = 0;
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
write_unlock_bh(&ipv6_sk_ac_lock);
|
|
|
prev_index = 0;
|
prev_index = 0;
|
while (pac) {
|
while (pac) {
|
struct ipv6_ac_socklist *next = pac->acl_next;
|
struct ipv6_ac_socklist *next = pac->acl_next;
|
|
|
if (pac->acl_ifindex != prev_index) {
|
if (pac->acl_ifindex != prev_index) {
|
if (dev)
|
if (dev)
|
dev_put(dev);
|
dev_put(dev);
|
dev = dev_get_by_index(pac->acl_ifindex);
|
dev = dev_get_by_index(pac->acl_ifindex);
|
prev_index = pac->acl_ifindex;
|
prev_index = pac->acl_ifindex;
|
}
|
}
|
if (dev)
|
if (dev)
|
ipv6_dev_ac_dec(dev, &pac->acl_addr);
|
ipv6_dev_ac_dec(dev, &pac->acl_addr);
|
sock_kfree_s(sk, pac, sizeof(*pac));
|
sock_kfree_s(sk, pac, sizeof(*pac));
|
pac = next;
|
pac = next;
|
}
|
}
|
if (dev)
|
if (dev)
|
dev_put(dev);
|
dev_put(dev);
|
}
|
}
|
|
|
int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex)
|
int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex)
|
{
|
{
|
struct ipv6_ac_socklist *pac;
|
struct ipv6_ac_socklist *pac;
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
int found;
|
int found;
|
|
|
found = 0;
|
found = 0;
|
read_lock(&ipv6_sk_ac_lock);
|
read_lock(&ipv6_sk_ac_lock);
|
for (pac=np->ipv6_ac_list; pac; pac=pac->acl_next) {
|
for (pac=np->ipv6_ac_list; pac; pac=pac->acl_next) {
|
if (ifindex && pac->acl_ifindex != ifindex)
|
if (ifindex && pac->acl_ifindex != ifindex)
|
continue;
|
continue;
|
found = ipv6_addr_cmp(&pac->acl_addr, addr) == 0;
|
found = ipv6_addr_cmp(&pac->acl_addr, addr) == 0;
|
if (found)
|
if (found)
|
break;
|
break;
|
}
|
}
|
read_unlock(&ipv6_sk_ac_lock);
|
read_unlock(&ipv6_sk_ac_lock);
|
|
|
return found;
|
return found;
|
}
|
}
|
|
|
static void aca_put(struct ifacaddr6 *ac)
|
static void aca_put(struct ifacaddr6 *ac)
|
{
|
{
|
if (atomic_dec_and_test(&ac->aca_refcnt)) {
|
if (atomic_dec_and_test(&ac->aca_refcnt)) {
|
in6_dev_put(ac->aca_idev);
|
in6_dev_put(ac->aca_idev);
|
kfree(ac);
|
kfree(ac);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* device anycast group inc (add if not found)
|
* device anycast group inc (add if not found)
|
*/
|
*/
|
int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
|
int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
|
{
|
{
|
struct ifacaddr6 *aca;
|
struct ifacaddr6 *aca;
|
struct inet6_dev *idev;
|
struct inet6_dev *idev;
|
|
|
idev = in6_dev_get(dev);
|
idev = in6_dev_get(dev);
|
|
|
if (idev == NULL)
|
if (idev == NULL)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
write_lock_bh(&idev->lock);
|
write_lock_bh(&idev->lock);
|
if (idev->dead) {
|
if (idev->dead) {
|
write_unlock_bh(&idev->lock);
|
write_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
return -ENODEV;
|
return -ENODEV;
|
}
|
}
|
|
|
for (aca = idev->ac_list; aca; aca = aca->aca_next) {
|
for (aca = idev->ac_list; aca; aca = aca->aca_next) {
|
if (ipv6_addr_cmp(&aca->aca_addr, addr) == 0) {
|
if (ipv6_addr_cmp(&aca->aca_addr, addr) == 0) {
|
aca->aca_users++;
|
aca->aca_users++;
|
write_unlock_bh(&idev->lock);
|
write_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* not found: create a new one.
|
* not found: create a new one.
|
*/
|
*/
|
|
|
aca = kmalloc(sizeof(struct ifacaddr6), GFP_ATOMIC);
|
aca = kmalloc(sizeof(struct ifacaddr6), GFP_ATOMIC);
|
|
|
if (aca == NULL) {
|
if (aca == NULL) {
|
write_unlock_bh(&idev->lock);
|
write_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
memset(aca, 0, sizeof(struct ifacaddr6));
|
memset(aca, 0, sizeof(struct ifacaddr6));
|
|
|
ipv6_addr_copy(&aca->aca_addr, addr);
|
ipv6_addr_copy(&aca->aca_addr, addr);
|
aca->aca_idev = idev;
|
aca->aca_idev = idev;
|
aca->aca_users = 1;
|
aca->aca_users = 1;
|
atomic_set(&aca->aca_refcnt, 2);
|
atomic_set(&aca->aca_refcnt, 2);
|
aca->aca_lock = SPIN_LOCK_UNLOCKED;
|
aca->aca_lock = SPIN_LOCK_UNLOCKED;
|
|
|
aca->aca_next = idev->ac_list;
|
aca->aca_next = idev->ac_list;
|
idev->ac_list = aca;
|
idev->ac_list = aca;
|
write_unlock_bh(&idev->lock);
|
write_unlock_bh(&idev->lock);
|
|
|
ip6_rt_addr_add(&aca->aca_addr, dev);
|
ip6_rt_addr_add(&aca->aca_addr, dev);
|
|
|
addrconf_join_solict(dev, &aca->aca_addr);
|
addrconf_join_solict(dev, &aca->aca_addr);
|
|
|
aca_put(aca);
|
aca_put(aca);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* device anycast group decrement
|
* device anycast group decrement
|
*/
|
*/
|
int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr)
|
int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr)
|
{
|
{
|
struct inet6_dev *idev;
|
struct inet6_dev *idev;
|
struct ifacaddr6 *aca, *prev_aca;
|
struct ifacaddr6 *aca, *prev_aca;
|
|
|
idev = in6_dev_get(dev);
|
idev = in6_dev_get(dev);
|
if (idev == NULL)
|
if (idev == NULL)
|
return -ENODEV;
|
return -ENODEV;
|
|
|
write_lock_bh(&idev->lock);
|
write_lock_bh(&idev->lock);
|
prev_aca = 0;
|
prev_aca = 0;
|
for (aca = idev->ac_list; aca; aca = aca->aca_next) {
|
for (aca = idev->ac_list; aca; aca = aca->aca_next) {
|
if (ipv6_addr_cmp(&aca->aca_addr, addr) == 0)
|
if (ipv6_addr_cmp(&aca->aca_addr, addr) == 0)
|
break;
|
break;
|
prev_aca = aca;
|
prev_aca = aca;
|
}
|
}
|
if (!aca) {
|
if (!aca) {
|
write_unlock_bh(&idev->lock);
|
write_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
return -ENOENT;
|
return -ENOENT;
|
}
|
}
|
if (--aca->aca_users > 0) {
|
if (--aca->aca_users > 0) {
|
write_unlock_bh(&idev->lock);
|
write_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
return 0;
|
return 0;
|
}
|
}
|
if (prev_aca)
|
if (prev_aca)
|
prev_aca->aca_next = aca->aca_next;
|
prev_aca->aca_next = aca->aca_next;
|
else
|
else
|
idev->ac_list = aca->aca_next;
|
idev->ac_list = aca->aca_next;
|
write_unlock_bh(&idev->lock);
|
write_unlock_bh(&idev->lock);
|
addrconf_leave_solict(dev, &aca->aca_addr);
|
addrconf_leave_solict(dev, &aca->aca_addr);
|
|
|
ip6_rt_addr_del(&aca->aca_addr, dev);
|
ip6_rt_addr_del(&aca->aca_addr, dev);
|
|
|
aca_put(aca);
|
aca_put(aca);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* check if the interface has this anycast address
|
* check if the interface has this anycast address
|
*/
|
*/
|
static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
|
static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
|
{
|
{
|
struct inet6_dev *idev;
|
struct inet6_dev *idev;
|
struct ifacaddr6 *aca;
|
struct ifacaddr6 *aca;
|
|
|
idev = in6_dev_get(dev);
|
idev = in6_dev_get(dev);
|
if (idev) {
|
if (idev) {
|
read_lock_bh(&idev->lock);
|
read_lock_bh(&idev->lock);
|
for (aca = idev->ac_list; aca; aca = aca->aca_next)
|
for (aca = idev->ac_list; aca; aca = aca->aca_next)
|
if (ipv6_addr_cmp(&aca->aca_addr, addr) == 0)
|
if (ipv6_addr_cmp(&aca->aca_addr, addr) == 0)
|
break;
|
break;
|
read_unlock_bh(&idev->lock);
|
read_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
return aca != 0;
|
return aca != 0;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* check if given interface (or any, if dev==0) has this anycast address
|
* check if given interface (or any, if dev==0) has this anycast address
|
*/
|
*/
|
int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr)
|
int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr)
|
{
|
{
|
if (dev)
|
if (dev)
|
return ipv6_chk_acast_dev(dev, addr);
|
return ipv6_chk_acast_dev(dev, addr);
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
for (dev=dev_base; dev; dev=dev->next)
|
for (dev=dev_base; dev; dev=dev->next)
|
if (ipv6_chk_acast_dev(dev, addr))
|
if (ipv6_chk_acast_dev(dev, addr))
|
break;
|
break;
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
return dev != 0;
|
return dev != 0;
|
}
|
}
|
|
|
|
|
#ifdef CONFIG_PROC_FS
|
#ifdef CONFIG_PROC_FS
|
int anycast6_get_info(char *buffer, char **start, off_t offset, int length)
|
int anycast6_get_info(char *buffer, char **start, off_t offset, int length)
|
{
|
{
|
off_t pos=0, begin=0;
|
off_t pos=0, begin=0;
|
struct ifacaddr6 *im;
|
struct ifacaddr6 *im;
|
int len=0;
|
int len=0;
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
read_lock(&dev_base_lock);
|
read_lock(&dev_base_lock);
|
for (dev = dev_base; dev; dev = dev->next) {
|
for (dev = dev_base; dev; dev = dev->next) {
|
struct inet6_dev *idev;
|
struct inet6_dev *idev;
|
|
|
if ((idev = in6_dev_get(dev)) == NULL)
|
if ((idev = in6_dev_get(dev)) == NULL)
|
continue;
|
continue;
|
|
|
read_lock_bh(&idev->lock);
|
read_lock_bh(&idev->lock);
|
for (im = idev->ac_list; im; im = im->aca_next) {
|
for (im = idev->ac_list; im; im = im->aca_next) {
|
int i;
|
int i;
|
|
|
len += sprintf(buffer+len,"%-4d %-15s ", dev->ifindex, dev->name);
|
len += sprintf(buffer+len,"%-4d %-15s ", dev->ifindex, dev->name);
|
|
|
for (i=0; i<16; i++)
|
for (i=0; i<16; i++)
|
len += sprintf(buffer+len, "%02x", im->aca_addr.s6_addr[i]);
|
len += sprintf(buffer+len, "%02x", im->aca_addr.s6_addr[i]);
|
|
|
len += sprintf(buffer+len, " %5d\n", im->aca_users);
|
len += sprintf(buffer+len, " %5d\n", im->aca_users);
|
|
|
pos=begin+len;
|
pos=begin+len;
|
if (pos < offset) {
|
if (pos < offset) {
|
len=0;
|
len=0;
|
begin=pos;
|
begin=pos;
|
}
|
}
|
if (pos > offset+length) {
|
if (pos > offset+length) {
|
read_unlock_bh(&idev->lock);
|
read_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
goto done;
|
goto done;
|
}
|
}
|
}
|
}
|
read_unlock_bh(&idev->lock);
|
read_unlock_bh(&idev->lock);
|
in6_dev_put(idev);
|
in6_dev_put(idev);
|
}
|
}
|
|
|
done:
|
done:
|
read_unlock(&dev_base_lock);
|
read_unlock(&dev_base_lock);
|
|
|
*start=buffer+(offset-begin);
|
*start=buffer+(offset-begin);
|
len-=(offset-begin);
|
len-=(offset-begin);
|
if(len>length)
|
if(len>length)
|
len=length;
|
len=length;
|
if (len<0)
|
if (len<0)
|
len=0;
|
len=0;
|
return len;
|
return len;
|
}
|
}
|
|
|
#endif
|
#endif
|
|
|
