diff --git a/3rdparty/libe2ap/CauseProtocol.c b/3rdparty/libe2ap/CauseProtocol.c
new file mode 100644
index 0000000..94ca736
--- /dev/null
+++ b/3rdparty/libe2ap/CauseProtocol.c
@@ -0,0 +1,65 @@
+/*
+ * Generated by asn1c-0.9.29 (http://lionet.info/asn1c)
+ * From ASN.1 module "X2AP-IEs"
+ * 	found in "Spec/e2_and_x2-combined-and-minimized.asn1"
+ * 	`asn1c -pdu=auto -fincludes-quoted -fcompound-names -fno-include-deps -gen-PER -no-gen-OER -no-gen-example`
+ */
+
+#include "CauseProtocol.h"
+
+/*
+ * This type is implemented using NativeEnumerated,
+ * so here we adjust the DEF accordingly.
+ */
+asn_per_constraints_t asn_PER_type_CauseProtocol_constr_1 CC_NOTUSED = {
+	{ APC_CONSTRAINED | APC_EXTENSIBLE,  3,  3,  0,  6 }	/* (0..6,...) */,
+	{ APC_UNCONSTRAINED,	-1, -1,  0,  0 },
+	0, 0	/* No PER value map */
+};
+static const asn_INTEGER_enum_map_t asn_MAP_CauseProtocol_value2enum_1[] = {
+	{ 0,	21,	"transfer-syntax-error" },
+	{ 1,	28,	"abstract-syntax-error-reject" },
+	{ 2,	39,	"abstract-syntax-error-ignore-and-notify" },
+	{ 3,	42,	"message-not-compatible-with-receiver-state" },
+	{ 4,	14,	"semantic-error" },
+	{ 5,	11,	"unspecified" },
+	{ 6,	49,	"abstract-syntax-error-falsely-constructed-message" }
+	/* This list is extensible */
+};
+static const unsigned int asn_MAP_CauseProtocol_enum2value_1[] = {
+	6,	/* abstract-syntax-error-falsely-constructed-message(6) */
+	2,	/* abstract-syntax-error-ignore-and-notify(2) */
+	1,	/* abstract-syntax-error-reject(1) */
+	3,	/* message-not-compatible-with-receiver-state(3) */
+	4,	/* semantic-error(4) */
+	0,	/* transfer-syntax-error(0) */
+	5	/* unspecified(5) */
+	/* This list is extensible */
+};
+const asn_INTEGER_specifics_t asn_SPC_CauseProtocol_specs_1 = {
+	asn_MAP_CauseProtocol_value2enum_1,	/* "tag" => N; sorted by tag */
+	asn_MAP_CauseProtocol_enum2value_1,	/* N => "tag"; sorted by N */
+	7,	/* Number of elements in the maps */
+	8,	/* Extensions before this member */
+	1,	/* Strict enumeration */
+	0,	/* Native long size */
+	0
+};
+static const ber_tlv_tag_t asn_DEF_CauseProtocol_tags_1[] = {
+	(ASN_TAG_CLASS_UNIVERSAL | (10 << 2))
+};
+asn_TYPE_descriptor_t asn_DEF_CauseProtocol = {
+	"CauseProtocol",
+	"CauseProtocol",
+	&asn_OP_NativeEnumerated,
+	asn_DEF_CauseProtocol_tags_1,
+	sizeof(asn_DEF_CauseProtocol_tags_1)
+		/sizeof(asn_DEF_CauseProtocol_tags_1[0]), /* 1 */
+	asn_DEF_CauseProtocol_tags_1,	/* Same as above */
+	sizeof(asn_DEF_CauseProtocol_tags_1)
+		/sizeof(asn_DEF_CauseProtocol_tags_1[0]), /* 1 */
+	{ 0, &asn_PER_type_CauseProtocol_constr_1, NativeEnumerated_constraint },
+	0, 0,	/* Defined elsewhere */
+	&asn_SPC_CauseProtocol_specs_1	/* Additional specs */
+};
+