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| author | Jonathan T. Leighton | 2017-02-12 23:26:07 +0100 |
|---|---|---|
| committer | David S. Miller | 2017-02-14 18:13:51 +0100 |
| commit | 052d2369d1b479cdbbe020fdd6d057d3c342db74 (patch) | |
| tree | 16f83a2393edec2827eac68eac1d1e739dcb862f /net/ipv6/udp.c | |
| parent | ipv6: Inhibit IPv4-mapped src address on the wire. (diff) | |
| download | kernel-qcow2-linux-052d2369d1b479cdbbe020fdd6d057d3c342db74.tar.gz kernel-qcow2-linux-052d2369d1b479cdbbe020fdd6d057d3c342db74.tar.xz kernel-qcow2-linux-052d2369d1b479cdbbe020fdd6d057d3c342db74.zip | |
ipv6: Handle IPv4-mapped src to in6addr_any dst.
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>
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 8990856f5101..221825a9407a 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -1033,6 +1033,10 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) if (addr_len < SIN6_LEN_RFC2133) return -EINVAL; daddr = &sin6->sin6_addr; + if (ipv6_addr_any(daddr) && + ipv6_addr_v4mapped(&np->saddr)) + ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), + daddr); break; case AF_INET: goto do_udp_sendmsg; |