static void sit_add_v4_addrs(struct inet6_dev *idev)
{
struct inet6_ifaddr * ifp;
struct in6_addr addr;
struct device *dev;
int scope;
memset(&addr, 0, sizeof(struct in6_addr));
memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
if (idev->dev->flags&IFF_POINTOPOINT) {
addr.s6_addr32[0] = __constant_htonl(0xfe800000);
scope = IFA_LINK;
} else {
scope = IPV6_ADDR_COMPATv4;
}
if (addr.s6_addr32[3]) {
ifp = ipv6_add_addr(idev, &addr, scope);
if (ifp) {
ifp->flags |= ADDR_PERMANENT;
ifp->prefix_len = 128;
ipv6_ifa_notify(RTM_NEWADDR, ifp);
}
return;
}
for (dev = dev_base; dev != NULL; dev = dev->next) {
if (dev->ip_ptr && (dev->flags & IFF_UP)) {
struct in_device * in_dev = dev->ip_ptr;
struct in_ifaddr * ifa;
int flag = scope;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
addr.s6_addr32[3] = ifa->ifa_local;
if (ifa->ifa_scope == RT_SCOPE_LINK)
continue;
if (ifa->ifa_scope >= RT_SCOPE_HOST) {
if (idev->dev->flags&IFF_POINTOPOINT)
continue;
flag |= IFA_HOST;
}
ifp = ipv6_add_addr(idev, &addr, flag);
if (ifp == NULL)
continue;
if (idev->dev->flags&IFF_POINTOPOINT)
ifp->prefix_len = 10;
else
ifp->prefix_len = 96;
ifp->flags |= ADDR_PERMANENT;
ipv6_ifa_notify(RTM_NEWADDR, ifp);
}
}
}
}
static void init_loopback(struct net_device *dev)
{
struct in6_addr addr;
struct inet6_dev *idev;
struct inet6_ifaddr * ifp;
/* ::1 */
ASSERT_RTNL();
memset(&addr, 0, sizeof(struct in6_addr));
addr.s6_addr[15] = 1;
if ((idev = ipv6_find_idev(dev)) == NULL) {
printk(KERN_DEBUG "init loopback: add_dev failed\n");
return;
}
ifp = ipv6_add_addr(idev, &addr, 128, IFA_HOST, IFA_F_PERMANENT);
if (ifp) {
spin_lock_bh(&ifp->lock);
ifp->flags &= ~IFA_F_TENTATIVE;
spin_unlock_bh(&ifp->lock);
ipv6_ifa_notify(RTM_NEWADDR, ifp);
in6_ifa_put(ifp);
}
}
static void init_loopback(struct device *dev)
{
struct in6_addr addr;
struct inet6_dev *idev;
struct inet6_ifaddr * ifp;
/* ::1 */
memset(&addr, 0, sizeof(struct in6_addr));
addr.s6_addr[15] = 1;
if ((idev = ipv6_find_idev(dev)) == NULL) {
printk(KERN_DEBUG "init loopback: add_dev failed\n");
return;
}
ifp = ipv6_add_addr(idev, &addr, IFA_HOST);
if (ifp == NULL) {
printk(KERN_DEBUG "init_loopback: add_addr failed\n");
return;
}
ifp->flags |= ADDR_PERMANENT;
ifp->prefix_len = 128;
ipv6_ifa_notify(RTM_NEWADDR, ifp);
}
static void ipv6_del_addr(struct inet6_ifaddr *ifp)
{
struct inet6_ifaddr *iter, **back;
int hash;
if (atomic_read(&addr_list_lock)) {
ifp->flags |= ADDR_INVALID;
ipv6_ifa_notify(RTM_DELADDR, ifp);
return;
}
hash = ipv6_addr_hash(&ifp->addr);
iter = inet6_addr_lst[hash];
back = &inet6_addr_lst[hash];
for (; iter; iter = iter->lst_next) {
if (iter == ifp) {
*back = ifp->lst_next;
synchronize_bh();
ifp->lst_next = NULL;
break;
}
back = &(iter->lst_next);
}
iter = ifp->idev->addr_list;
back = &ifp->idev->addr_list;
for (; iter; iter = iter->if_next) {
if (iter == ifp) {
*back = ifp->if_next;
synchronize_bh();
ifp->if_next = NULL;
break;
}
back = &(iter->if_next);
}
ipv6_ifa_notify(RTM_DELADDR, ifp);
del_timer(&ifp->timer);
kfree(ifp);
}
static void ipv6_del_addr(struct inet6_ifaddr *ifp)
{
struct inet6_ifaddr *ifa, **ifap;
struct inet6_dev *idev = ifp->idev;
int hash;
hash = ipv6_addr_hash(&ifp->addr);
ifp->dead = 1;
write_lock_bh(&addrconf_hash_lock);
for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
ifap = &ifa->lst_next) {
if (ifa == ifp) {
*ifap = ifa->lst_next;
__in6_ifa_put(ifp);
ifa->lst_next = NULL;
break;
}
}
write_unlock_bh(&addrconf_hash_lock);
write_lock_bh(&idev->lock);
for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
ifap = &ifa->if_next) {
if (ifa == ifp) {
*ifap = ifa->if_next;
__in6_ifa_put(ifp);
ifa->if_next = NULL;
break;
}
}
write_unlock_bh(&idev->lock);
ipv6_ifa_notify(RTM_DELADDR, ifp);
notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
addrconf_del_timer(ifp);
in6_ifa_put(ifp);
}
void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
{
struct prefix_info *pinfo;
struct rt6_info *rt;
__u32 valid_lft;
__u32 prefered_lft;
int addr_type;
unsigned long rt_expires;
struct inet6_dev *in6_dev;
pinfo = (struct prefix_info *) opt;
if (len < sizeof(struct prefix_info)) {
ADBG(("addrconf: prefix option too short\n"));
return;
}
/*
* Validation checks ([ADDRCONF], page 19)
*/
addr_type = ipv6_addr_type(&pinfo->prefix);
if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
return;
valid_lft = ntohl(pinfo->valid);
prefered_lft = ntohl(pinfo->prefered);
if (prefered_lft > valid_lft) {
if (net_ratelimit())
printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
return;
}
in6_dev = in6_dev_get(dev);
if (in6_dev == NULL) {
if (net_ratelimit())
printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
return;
}
/*
* Two things going on here:
* 1) Add routes for on-link prefixes
* 2) Configure prefixes with the auto flag set
*/
/* Avoid arithemtic overflow. Really, we could
save rt_expires in seconds, likely valid_lft,
but it would require division in fib gc, that it
not good.
*/
if (valid_lft >= 0x7FFFFFFF/HZ)
rt_expires = 0;
else
rt_expires = jiffies + valid_lft * HZ;
rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
if (rt->rt6i_flags&RTF_EXPIRES) {
if (pinfo->onlink == 0 || valid_lft == 0) {
ip6_del_rt(rt);
rt = NULL;
} else {
rt->rt6i_expires = rt_expires;
}
}
} else if (pinfo->onlink && valid_lft) {
addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES);
}
if (rt)
dst_release(&rt->u.dst);
/* Try to figure out our local address for this prefix */
if (pinfo->autoconf && in6_dev->cnf.autoconf) {
struct inet6_ifaddr * ifp;
struct in6_addr addr;
int plen;
plen = pinfo->prefix_len >> 3;
if (pinfo->prefix_len == 64) {
memcpy(&addr, &pinfo->prefix, 8);
if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
in6_dev_put(in6_dev);
return;
}
goto ok;
}
if (net_ratelimit())
printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
pinfo->prefix_len);
in6_dev_put(in6_dev);
return;
ok:
ifp = ipv6_get_ifaddr(&addr, dev);
if (ifp == NULL && valid_lft) {
ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
addr_type&IPV6_ADDR_SCOPE_MASK, 0);
if (ifp == NULL) {
in6_dev_put(in6_dev);
return;
}
addrconf_dad_start(ifp);
}
if (ifp && valid_lft == 0) {
ipv6_del_addr(ifp);
ifp = NULL;
}
if (ifp) {
int flags;
spin_lock(&ifp->lock);
ifp->valid_lft = valid_lft;
ifp->prefered_lft = prefered_lft;
ifp->tstamp = jiffies;
flags = ifp->flags;
ifp->flags &= ~IFA_F_DEPRECATED;
spin_unlock(&ifp->lock);
if (!(flags&IFA_F_TENTATIVE))
ipv6_ifa_notify((flags&IFA_F_DEPRECATED) ?
0 : RTM_NEWADDR, ifp);
in6_ifa_put(ifp);
}
}
in6_dev_put(in6_dev);
}
static void sit_add_v4_addrs(struct inet6_dev *idev)
{
struct inet6_ifaddr * ifp;
struct in6_addr addr;
struct net_device *dev;
int scope;
ASSERT_RTNL();
memset(&addr, 0, sizeof(struct in6_addr));
memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
if (idev->dev->flags&IFF_POINTOPOINT) {
addr.s6_addr32[0] = __constant_htonl(0xfe800000);
scope = IFA_LINK;
} else {
scope = IPV6_ADDR_COMPATv4;
}
if (addr.s6_addr32[3]) {
ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
if (ifp) {
spin_lock_bh(&ifp->lock);
ifp->flags &= ~IFA_F_TENTATIVE;
spin_unlock_bh(&ifp->lock);
ipv6_ifa_notify(RTM_NEWADDR, ifp);
in6_ifa_put(ifp);
}
return;
}
for (dev = dev_base; dev != NULL; dev = dev->next) {
struct in_device * in_dev = __in_dev_get(dev);
if (in_dev && (dev->flags & IFF_UP)) {
struct in_ifaddr * ifa;
int flag = scope;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
int plen;
addr.s6_addr32[3] = ifa->ifa_local;
if (ifa->ifa_scope == RT_SCOPE_LINK)
continue;
if (ifa->ifa_scope >= RT_SCOPE_HOST) {
if (idev->dev->flags&IFF_POINTOPOINT)
continue;
flag |= IFA_HOST;
}
if (idev->dev->flags&IFF_POINTOPOINT)
plen = 10;
else
plen = 96;
ifp = ipv6_add_addr(idev, &addr, plen, flag,
IFA_F_PERMANENT);
if (ifp) {
spin_lock_bh(&ifp->lock);
ifp->flags &= ~IFA_F_TENTATIVE;
spin_unlock_bh(&ifp->lock);
ipv6_ifa_notify(RTM_NEWADDR, ifp);
in6_ifa_put(ifp);
}
}
}
}
}
void addrconf_prefix_rcv(struct device *dev, u8 *opt, int len)
{
struct prefix_info *pinfo;
struct rt6_info *rt;
__u32 valid_lft;
__u32 prefered_lft;
int addr_type;
unsigned long rt_expires;
struct inet6_dev *in6_dev = ipv6_get_idev(dev);
if (in6_dev == NULL) {
printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
return;
}
pinfo = (struct prefix_info *) opt;
if (len < sizeof(struct prefix_info)) {
ADBG(("addrconf: prefix option too short\n"));
return;
}
/*
* Validation checks ([ADDRCONF], page 19)
*/
addr_type = ipv6_addr_type(&pinfo->prefix);
if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
return;
valid_lft = ntohl(pinfo->valid);
prefered_lft = ntohl(pinfo->prefered);
if (prefered_lft > valid_lft) {
printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
return;
}
/*
* If we where using an "all destinations on link" route
* delete it
*/
rt6_purge_dflt_routers(RTF_ALLONLINK);
/*
* Two things going on here:
* 1) Add routes for on-link prefixes
* 2) Configure prefixes with the auto flag set
*/
/* Avoid arithemtic overflow. Really, we could
save rt_expires in seconds, likely valid_lft,
but it would require division in fib gc, that it
not good.
*/
if (valid_lft >= 0x7FFFFFFF/HZ)
rt_expires = 0;
else
rt_expires = jiffies + valid_lft * HZ;
rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
if (rt->rt6i_flags&RTF_EXPIRES) {
if (pinfo->onlink == 0 || valid_lft == 0) {
ip6_del_rt(rt);
} else {
rt->rt6i_expires = rt_expires;
}
}
} else if (pinfo->onlink && valid_lft) {
addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES);
}
if (rt)
dst_release(&rt->u.dst);
/* Try to figure out our local address for this prefix */
if (pinfo->autoconf && in6_dev->cnf.autoconf) {
struct inet6_ifaddr * ifp;
struct in6_addr addr;
int plen;
plen = pinfo->prefix_len >> 3;
#ifdef CONFIG_IPV6_EUI64
if (pinfo->prefix_len == 64) {
memcpy(&addr, &pinfo->prefix, 8);
if (ipv6_generate_eui64(addr.s6_addr + 8, dev))
return;
goto ok;
}
#endif
#ifndef CONFIG_IPV6_NO_PB
if (pinfo->prefix_len == ((sizeof(struct in6_addr) - dev->addr_len)<<3)) {
memcpy(&addr, &pinfo->prefix, plen);
memcpy(addr.s6_addr + plen, dev->dev_addr,
dev->addr_len);
goto ok;
}
#endif
printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", pinfo->prefix_len);
return;
ok:
ifp = ipv6_chk_addr(&addr, dev, 1);
if ((ifp == NULL || (ifp->flags&ADDR_INVALID)) && valid_lft) {
if (ifp == NULL)
ifp = ipv6_add_addr(in6_dev, &addr, addr_type & IPV6_ADDR_SCOPE_MASK);
if (ifp == NULL)
return;
ifp->prefix_len = pinfo->prefix_len;
addrconf_dad_start(ifp);
}
if (ifp && valid_lft == 0) {
ipv6_del_addr(ifp);
ifp = NULL;
}
if (ifp) {
int event = 0;
ifp->valid_lft = valid_lft;
ifp->prefered_lft = prefered_lft;
ifp->tstamp = jiffies;
if (ifp->flags & ADDR_INVALID)
event = RTM_NEWADDR;
ifp->flags &= ~(ADDR_DEPRECATED|ADDR_INVALID);
ipv6_ifa_notify(event, ifp);
}
}
}
