path: root/net/ipv6/datagram.c
diff options
authorMax Matveev <makc@redhat.com>2011-08-05 03:56:30 -0700
committerDavid S. Miller <davem@davemloft.net>2011-08-05 03:56:30 -0700
commitc15fea2d8ca834dae491339c47e4fb3c81428190 (patch)
treebb0e318d09366001552d13efbbe128564956adde /net/ipv6/datagram.c
parentmlx4: decreasing ref count when removing mac (diff)
ipv6: check for IPv4 mapped addresses when connecting IPv6 sockets
When support for binding to 'mapped INADDR_ANY (::ffff.' was added in 0f8d3c7ac3693d7b6c731bf2159273a59bf70e12 the rest of the code wasn't told so now it's possible to bind IPv6 datagram socket to ::ffff., connect it to another IPv4 address and it will all work except for getsockhame() which does not return the local address as expected. To give getsockname() something to work with check for 'mapped INADDR_ANY' when connecting and update the in-core source addresses appropriately. Signed-off-by: Max Matveev <makc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
1 files changed, 9 insertions, 2 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 16560336eb72..9ef1831746ef 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -33,6 +33,11 @@
#include <linux/errqueue.h>
#include <asm/uaccess.h>
+static inline int ipv6_mapped_addr_any(const struct in6_addr *a)
+ return (ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0));
int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
@@ -102,10 +107,12 @@ ipv4_connected:
ipv6_addr_set_v4mapped(inet->inet_daddr, &np->daddr);
- if (ipv6_addr_any(&np->saddr))
+ if (ipv6_addr_any(&np->saddr) ||
+ ipv6_mapped_addr_any(&np->saddr))
ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr);
- if (ipv6_addr_any(&np->rcv_saddr)) {
+ if (ipv6_addr_any(&np->rcv_saddr) ||
+ ipv6_mapped_addr_any(&np->rcv_saddr)) {
if (sk->sk_prot->rehash)