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| author | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-06-25 11:26:47 +0400 |
|---|---|---|
| committer | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-07-03 12:51:55 +0400 |
| commit | d68b82705a4a754e5773f412c6b8f1e65259bc8b (patch) | |
| tree | 3bd32bb16b1e462d9c8be37f3b60ca2ec346d003 /net | |
| parent | b4653e99450693b75a3c6c8ff4f070164f12815e (diff) | |
| download | linux-d68b82705a4a754e5773f412c6b8f1e65259bc8b.tar.xz | |
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/addrconf.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 84127d854cfc..8b6875f02039 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -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) { |