[RFC PATCH 1/4] ipv6: Disallow binding to v4-mapped address on v6-only socket.
From: Vlad Yasevich <hidden>
Date: 2009-03-17 21:06:08
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> --- net/ipv6/af_inet6.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 3e2ddfa..07b9f3c 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c@@ -276,6 +276,13 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) /* Check if the address belongs to the host. */ 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]; if (inet_addr_type(net, v4addr) != RTN_LOCAL) { err = -EADDRNOTAVAIL;
--
1.5.4.3