diff --git a/src/s1ap/asn1c/asnGenFiles/INTEGER.h b/src/s1ap/asn1c/asnGenFiles/INTEGER.h
new file mode 100644
index 0000000..f776c07
--- /dev/null
+++ b/src/s1ap/asn1c/asnGenFiles/INTEGER.h
@@ -0,0 +1,108 @@
+/*-
+ * Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef	_INTEGER_H_
+#define	_INTEGER_H_
+
+#include <asn_application.h>
+#include <asn_codecs_prim.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef ASN__PRIMITIVE_TYPE_t INTEGER_t;
+
+extern asn_TYPE_descriptor_t asn_DEF_INTEGER;
+extern asn_TYPE_operation_t asn_OP_INTEGER;
+
+/* Map with <tag> to integer value association */
+typedef struct asn_INTEGER_enum_map_s {
+	long		 nat_value;	/* associated native integer value */
+	size_t		 enum_len;	/* strlen("tag") */
+	const char	*enum_name;	/* "tag" */
+} asn_INTEGER_enum_map_t;
+
+/* This type describes an enumeration for INTEGER and ENUMERATED types */
+typedef struct asn_INTEGER_specifics_s {
+	const asn_INTEGER_enum_map_t *value2enum;	/* N -> "tag"; sorted by N */
+	const unsigned int *enum2value;		/* "tag" => N; sorted by tag */
+	int map_count;				/* Elements in either map */
+	int extension;				/* This map is extensible */
+	int strict_enumeration;			/* Enumeration set is fixed */
+	int field_width;			/* Size of native integer */
+	int field_unsigned;			/* Signed=0, unsigned=1 */
+} asn_INTEGER_specifics_t;
+
+#define INTEGER_free    ASN__PRIMITIVE_TYPE_free
+#define INTEGER_decode_ber	ber_decode_primitive
+#define INTEGER_constraint	asn_generic_no_constraint
+asn_struct_print_f INTEGER_print;
+asn_struct_compare_f INTEGER_compare;
+der_type_encoder_f INTEGER_encode_der;
+xer_type_decoder_f INTEGER_decode_xer;
+xer_type_encoder_f INTEGER_encode_xer;
+oer_type_decoder_f INTEGER_decode_oer;
+oer_type_encoder_f INTEGER_encode_oer;
+per_type_decoder_f INTEGER_decode_uper;
+per_type_encoder_f INTEGER_encode_uper;
+per_type_decoder_f INTEGER_decode_aper;
+per_type_encoder_f INTEGER_encode_aper;
+asn_random_fill_f  INTEGER_random_fill;
+
+/***********************************
+ * Some handy conversion routines. *
+ ***********************************/
+
+/*
+ * Natiwe size-independent conversion of native integers to/from INTEGER.
+ * (l_size) is in bytes.
+ * Returns 0 if it was possible to convert, -1 otherwise.
+ * -1/EINVAL: Mandatory argument missing
+ * -1/ERANGE: Value encoded is out of range for long representation
+ * -1/ENOMEM: Memory allocation failed (in asn_*2INTEGER()).
+ */
+int asn_INTEGER2imax(const INTEGER_t *i, intmax_t *l);
+int asn_INTEGER2umax(const INTEGER_t *i, uintmax_t *l);
+int asn_imax2INTEGER(INTEGER_t *i, intmax_t l);
+int asn_umax2INTEGER(INTEGER_t *i, uintmax_t l);
+
+/*
+ * Size-specific conversion helpers.
+ */
+int asn_INTEGER2long(const INTEGER_t *i, long *l);
+int asn_INTEGER2ulong(const INTEGER_t *i, unsigned long *l);
+int asn_long2INTEGER(INTEGER_t *i, long l);
+int asn_ulong2INTEGER(INTEGER_t *i, unsigned long l);
+int asn_int642INTEGER(INTEGER_t *i, int64_t l);
+int asn_uint642INTEGER(INTEGER_t *i, uint64_t l);
+
+/* A version of strtol/strtoimax(3) with nicer error reporting. */
+enum asn_strtox_result_e {
+    ASN_STRTOX_ERROR_RANGE = -3,  /* Input outside of supported numeric range */
+    ASN_STRTOX_ERROR_INVAL = -2,  /* Invalid data encountered (e.g., "+-") */
+    ASN_STRTOX_EXPECT_MORE = -1,  /* More data expected (e.g. "+") */
+    ASN_STRTOX_OK          =  0,  /* Conversion succeded, number ends at (*end) */
+    ASN_STRTOX_EXTRA_DATA  =  1   /* Conversion succeded, but the string has extra stuff */
+};
+enum asn_strtox_result_e asn_strtol_lim(const char *str, const char **end,
+                                        long *l);
+enum asn_strtox_result_e asn_strtoul_lim(const char *str, const char **end,
+                                         unsigned long *l);
+enum asn_strtox_result_e asn_strtoimax_lim(const char *str, const char **end,
+                                           intmax_t *l);
+enum asn_strtox_result_e asn_strtoumax_lim(const char *str, const char **end,
+                                           uintmax_t *l);
+
+/*
+ * Convert the integer value into the corresponding enumeration map entry.
+ */
+const asn_INTEGER_enum_map_t *INTEGER_map_value2enum(
+    const asn_INTEGER_specifics_t *specs, long value);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _INTEGER_H_ */