xua_msg: Add xua_from_nested() helper function for nested IEs

Change-Id: If664ac20f43eb5c8e11bca6e61eb372e25613789

2 files changed, 7 insertions, 0 deletions

diff --git a/include/osmocom/sigtran/xua_msg.h b/include/osmocom/sigtran/xua_msg.h
index e0e1bcf..423adbc 100644
--- a/include/osmocom/sigtran/xua_msg.h
+++ b/include/osmocom/sigtran/xua_msg.h
@@ -82,6 +82,8 @@ int xua_msg_copy_part(struct xua_msg *xua_out, uint16_t tag_out,
 struct xua_msg *xua_from_msg(const int version, uint16_t len, uint8_t *data);
 struct msgb *xua_to_msg(const int version, struct xua_msg *msg);
 
+struct xua_msg *xua_from_nested(struct xua_msg_part *outer);
+
 int msgb_t16l16vp_put(struct msgb *msg, uint16_t tag, uint16_t len, const uint8_t *data);
 int msgb_t16l16vp_put_u32(struct msgb *msg, uint16_t tag, uint32_t val);
 int xua_msg_add_u32(struct xua_msg *xua, uint16_t iei, uint32_t val);
diff --git a/src/xua_msg.c b/src/xua_msg.c
index cb487c8..a5b7560 100644
--- a/src/xua_msg.c
+++ b/src/xua_msg.c
@@ -163,6 +163,11 @@ fail:
 	return NULL;
 }
 
+struct xua_msg *xua_from_nested(struct xua_msg_part *outer)
+{
+	return xua_from_msg(0, outer->len, outer->dat);
+}
+
 struct msgb *xua_to_msg(const int version, struct xua_msg *xua)
 {
 	struct xua_msg_part *part;