Commit d68b8270 authored Jun 25, 2008 by YOSHIFUJI Hideaki

ipv6: Do not assign non-valid address on interface.



Check the type of the address when adding a new one on interface.
- the unspecified address (::) is always disallowed (RFC4291 2.5.2)
- the loopback address is disallowed unless the interface is (one of)
  loopback (RFC4291 2.5.3).
- multicast addresses are disallowed.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

parent b4653e99

net/ipv6/addrconf.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -578,6 +578,13 @@ ipv6_add_addr(struct inet6_dev idev, const struct in6_addr addr, int pfxlen,
		struct rt6_info *rt;
		int hash;
		int err = 0;
		int addr_type = ipv6_addr_type(addr);

		if (addr_type == IPV6_ADDR_ANY \|\|
		addr_type & IPV6_ADDR_MULTICAST \|\|
		(!(idev->dev->flags & IFF_LOOPBACK) &&
		addr_type & IPV6_ADDR_LOOPBACK))
		return ERR_PTR(-EADDRNOTAVAIL);

		rcu_read_lock_bh();
		if (idev->dead) {