tlv: Add TLVP_VAL_MINLEN() to obtain value _if_ length is >= minimum
This is a combination of TLVP_VAP() and TLVP_GET_MINLEN()
Change-Id: Ic5a177941219ebc3a3bceb3f68bdb3b2cacb934b
diff --git a/include/osmocom/gsm/tlv.h b/include/osmocom/gsm/tlv.h
index a130dc8..84fd511 100644
--- a/include/osmocom/gsm/tlv.h
+++ b/include/osmocom/gsm/tlv.h
@@ -467,6 +467,16 @@
#define TLVP_GET_MINLEN(_tp, tag, min_len) \
(TLVP_PRES_LEN(_tp, tag, min_len)? &(_tp)->lv[tag] : NULL)
+/*! Like TLVP_VAL(), but enforcing a minimum val length.
+ * \param[in] _tp pointer to \ref tlv_parsed.
+ * \param[in] tag IE tag to return.
+ * \param[in] min_len Minimum value length in bytes.
+ * \returns struct tlv_p_entry pointer, or NULL if not present or too short.
+ */
+#define TLVP_VAL_MINLEN(_tp, tag, min_len) \
+ (TLVP_PRES_LEN(_tp, tag, min_len)? (_tp)->lv[tag].val : NULL)
+
+
/*! Align given TLV element with 16 bit value to an even address
* \param[in] tp pointer to \ref tlv_parsed
* \param[in] pos element to return