xfrm: Notify changes in UDP encapsulation via netlink

Add new_mapping() implementation to the netlink xfrm_mgr to notify
address/port changes detected in UDP encapsulated ESP packets.

Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 4bc1e6b86cb2..52f3abd453a1 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -199,6 +199,9 @@ enum {
 #define XFRM_MSG_NEWSPDINFO XFRM_MSG_NEWSPDINFO
         XFRM_MSG_GETSPDINFO,
 #define XFRM_MSG_GETSPDINFO XFRM_MSG_GETSPDINFO
+
+        XFRM_MSG_MAPPING,
+#define XFRM_MSG_MAPPING XFRM_MSG_MAPPING
         __XFRM_MSG_MAX
 };
 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
@@ -438,6 +441,15 @@ struct xfrm_user_migrate {
         __u16                           new_family;
 };
 
+struct xfrm_user_mapping {
+        struct xfrm_usersa_id           id;
+        __u32                           reqid;
+        xfrm_address_t                  old_saddr;
+        xfrm_address_t                  new_saddr;
+        __be16                          old_sport;
+        __be16                          new_sport;
+};
+
 #ifndef __KERNEL__
 /* backwards compatibility for userspace */
 #define XFRMGRP_ACQUIRE         1
@@ -464,6 +476,8 @@ enum xfrm_nlgroups {
 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
         XFRMNLGRP_MIGRATE,
 #define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
+        XFRMNLGRP_MAPPING,
+#define XFRMNLGRP_MAPPING       XFRMNLGRP_MAPPING
         __XFRMNLGRP_MAX
 };
 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)