diff options
| author | Jonathan T. Leighton <jtleight@udel.edu> | 2017-05-23 21:53:33 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 06:41:49 +0200 |
| commit | 12ec2560d467812424ff8eb6f7fccc83f64aae3d (patch) | |
| tree | 6f5c8a80aec02f93910891060f2c8ac7191260da /net/ipv6/datagram.c | |
| parent | 116589a5a7e0f3dc91a50b9d39365306b2198680 (diff) | |
ipv6: Handle IPv4-mapped src to in6addr_any dst.
[ Upstream commit 052d2369d1b479cdbbe020fdd6d057d3c342db74 ]
This patch adds a check on the type of the source address for the case
where the destination address is in6addr_any. If the source is an
IPv4-mapped IPv6 source address, the destination is changed to
::ffff:127.0.0.1, and otherwise the destination is changed to ::1. This
is done in three locations to handle UDP calls to either connect() or
sendmsg() and TCP calls to connect(). Note that udpv6_sendmsg() delays
handling an in6addr_any destination until very late, so the patch only
needs to handle the case where the source is an IPv4-mapped IPv6
address.
Signed-off-by: Jonathan T. Leighton <jtleight@udel.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6/datagram.c')
| -rw-r--r-- | net/ipv6/datagram.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index 442ec1f39ed1..38062f403ceb 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -166,18 +166,22 @@ int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, if (np->sndflow) fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; - addr_type = ipv6_addr_type(&usin->sin6_addr); - - if (addr_type == IPV6_ADDR_ANY) { + if (ipv6_addr_any(&usin->sin6_addr)) { /* * connect to self */ - usin->sin6_addr.s6_addr[15] = 0x01; + if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)) + ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), + &usin->sin6_addr); + else + usin->sin6_addr = in6addr_loopback; } + addr_type = ipv6_addr_type(&usin->sin6_addr); + daddr = &usin->sin6_addr; - if (addr_type == IPV6_ADDR_MAPPED) { + if (addr_type & IPV6_ADDR_MAPPED) { struct sockaddr_in sin; if (__ipv6_only_sock(sk)) { |