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authorMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>2020-06-24 17:34:18 -0300
committerDavid S. Miller <davem@davemloft.net>2020-06-25 16:11:33 -0700
commit471e39df96b9a4c4ba88a2da9e25a126624d7a9c (patch)
treea06297f6b1d9cd3faf32b37b95d1fe01191209ed /include
parenttc-testing: avoid action cookies with odd length. (diff)
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sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket
If a socket is set ipv6only, it will still send IPv4 addresses in the INIT and INIT_ACK packets. This potentially misleads the peer into using them, which then would cause association termination. The fix is to not add IPv4 addresses to ipv6only sockets. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Tested-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/sctp/constants.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/include/net/sctp/constants.h b/include/net/sctp/constants.h
index 15b4d9aec7ff..122d9e2d8dfd 100644
--- a/include/net/sctp/constants.h
+++ b/include/net/sctp/constants.h
@@ -353,11 +353,13 @@ enum {
ipv4_is_anycast_6to4(a))
/* Flags used for the bind address copy functions. */
-#define SCTP_ADDR6_ALLOWED 0x00000001 /* IPv6 address is allowed by
+#define SCTP_ADDR4_ALLOWED 0x00000001 /* IPv4 address is allowed by
local sock family */
-#define SCTP_ADDR4_PEERSUPP 0x00000002 /* IPv4 address is supported by
+#define SCTP_ADDR6_ALLOWED 0x00000002 /* IPv6 address is allowed by
+ local sock family */
+#define SCTP_ADDR4_PEERSUPP 0x00000004 /* IPv4 address is supported by
peer */
-#define SCTP_ADDR6_PEERSUPP 0x00000004 /* IPv6 address is supported by
+#define SCTP_ADDR6_PEERSUPP 0x00000008 /* IPv6 address is supported by
peer */
/* Reasons to retransmit. */