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ipv6: Disallow binding to v4-mapped address on v6-only socket.

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A socket marked v6-only, can not receive or send traffic to v4-mapped
addresses.  Thus allowing binding to v4-mapped address on such a
socket makes no sense.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2009-03-24 16:24:48 +00:00 committed by David S. Miller
parent 4097f663cb
commit 783ed5a783
1 changed files with 7 additions and 0 deletions
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7
net/ipv6/af_inet6.c
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@ -276,6 +276,13 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
/* Check if the address belongs to the host. */ /* Check if the address belongs to the host. */
if (addr_type == IPV6_ADDR_MAPPED) { if (addr_type == IPV6_ADDR_MAPPED) {
/* Binding to v4-mapped address on a v6-only socket
* makes no sense
*/
if (np->ipv6only) {
err = -EINVAL;
goto out;
}
v4addr = addr->sin6_addr.s6_addr32[3]; v4addr = addr->sin6_addr.s6_addr32[3];
if (inet_addr_type(net, v4addr) != RTN_LOCAL) { if (inet_addr_type(net, v4addr) != RTN_LOCAL) {
err = -EADDRNOTAVAIL; err = -EADDRNOTAVAIL;