diff --git a/src/s1ap/asn1c/asnGenFiles/asn_system.h b/src/s1ap/asn1c/asnGenFiles/asn_system.h
new file mode 100644
index 0000000..fa8cf11
--- /dev/null
+++ b/src/s1ap/asn1c/asnGenFiles/asn_system.h
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+/*
+ * Miscellaneous system-dependent types.
+ */
+#ifndef	ASN_SYSTEM_H
+#define	ASN_SYSTEM_H
+
+#ifdef	HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef _DEFAULT_SOURCE
+#define _DEFAULT_SOURCE 1
+#endif
+
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE /* for snprintf() on some linux systems  */
+#endif
+
+#include <stdio.h>	/* For snprintf(3) */
+#include <stdlib.h>	/* For *alloc(3) */
+#include <string.h>	/* For memcpy(3) */
+#include <sys/types.h>	/* For size_t */
+#include <limits.h>	/* For LONG_MAX */
+#include <stdarg.h>	/* For va_start */
+#include <stddef.h>	/* for offsetof and ptrdiff_t */
+
+#ifdef	_WIN32
+
+#include <malloc.h>
+#define	 snprintf	_snprintf
+#define	 vsnprintf	_vsnprintf
+
+/* To avoid linking with ws2_32.lib, here's the definition of ntohl() */
+#define sys_ntohl(l)	((((l) << 24)  & 0xff000000)	\
+			| (((l) << 8) & 0xff0000)	\
+			| (((l) >> 8)  & 0xff00)	\
+			| ((l >> 24) & 0xff))
+
+#ifdef _MSC_VER			/* MSVS.Net */
+#ifndef __cplusplus
+#define inline __inline
+#endif
+#ifndef	ASSUMESTDTYPES	/* Standard types have been defined elsewhere */
+#define	ssize_t		SSIZE_T
+#if _MSC_VER < 1600
+typedef	char		int8_t;
+typedef	short		int16_t;
+typedef	int		int32_t;
+typedef	unsigned char	uint8_t;
+typedef	unsigned short	uint16_t;
+typedef	unsigned int	uint32_t;
+#else /* _MSC_VER >= 1600 */
+#include <stdint.h>
+#endif /* _MSC_VER < 1600 */
+#endif	/* ASSUMESTDTYPES */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <float.h>
+#define isnan _isnan
+#define finite _finite
+#define copysign _copysign
+#define	ilogb	_logb
+#else	/* !_MSC_VER */
+#include <stdint.h>
+#endif	/* _MSC_VER */
+
+#else	/* !_WIN32 */
+
+#if defined(__vxworks)
+#include <types/vxTypes.h>
+#else	/* !defined(__vxworks) */
+
+#include <inttypes.h>	/* C99 specifies this file */
+#include <netinet/in.h> /* for ntohl() */
+#define	sys_ntohl(foo)	ntohl(foo)
+#endif	/* defined(__vxworks) */
+
+#endif	/* _WIN32 */
+
+#if	__GNUC__ >= 3 || defined(__clang__)
+#define CC_ATTRIBUTE(attr)    __attribute__((attr))
+#else
+#define CC_ATTRIBUTE(attr)
+#endif
+#define CC_PRINTFLIKE(fmt, var)     CC_ATTRIBUTE(format(printf, fmt, var))
+#define	CC_NOTUSED                  CC_ATTRIBUTE(unused)
+#ifndef CC_ATTR_NO_SANITIZE
+#define CC_ATTR_NO_SANITIZE(what)   CC_ATTRIBUTE(no_sanitize(what))
+#endif
+
+/* Figure out if thread safety is requested */
+#if !defined(ASN_THREAD_SAFE) && (defined(THREAD_SAFE) || defined(_REENTRANT))
+#define	ASN_THREAD_SAFE
+#endif	/* Thread safety */
+
+#ifndef	offsetof	/* If not defined by <stddef.h> */
+#define	offsetof(s, m)	((ptrdiff_t)&(((s *)0)->m) - (ptrdiff_t)((s *)0))
+#endif	/* offsetof */
+
+#ifndef	MIN		/* Suitable for comparing primitive types (integers) */
+#if defined(__GNUC__)
+#define	MIN(a,b)	({ __typeof a _a = a; __typeof b _b = b;	\
+	((_a)<(_b)?(_a):(_b)); })
+#else	/* !__GNUC__ */
+#define	MIN(a,b)	((a)<(b)?(a):(b))	/* Unsafe variant */
+#endif /* __GNUC__ */
+#endif	/* MIN */
+
+#if __STDC_VERSION__ >= 199901L
+#ifndef SIZE_MAX
+#define SIZE_MAX   ((~((size_t)0)) >> 1)
+#endif
+
+#ifndef RSIZE_MAX   /* C11, Annex K */
+#define RSIZE_MAX   (SIZE_MAX >> 1)
+#endif
+#ifndef RSSIZE_MAX   /* Halve signed size even further than unsigned */
+#define RSSIZE_MAX   ((ssize_t)(RSIZE_MAX >> 1))
+#endif
+#else   /* Old compiler */
+#undef  SIZE_MAX
+#undef  RSIZE_MAX
+#undef  RSSIZE_MAX
+#define SIZE_MAX   ((~((size_t)0)) >> 1)
+#define RSIZE_MAX   (SIZE_MAX >> 1)
+#define RSSIZE_MAX   ((ssize_t)(RSIZE_MAX >> 1))
+#endif
+
+#if __STDC_VERSION__ >= 199901L
+#define ASN_PRI_SIZE "zu"
+#define ASN_PRI_SSIZE "zd"
+#define ASN_PRIuMAX PRIuMAX
+#define ASN_PRIdMAX PRIdMAX
+#else
+#define ASN_PRI_SIZE "lu"
+#define ASN_PRI_SSIZE "ld"
+#if LLONG_MAX > LONG_MAX
+#define ASN_PRIuMAX "llu"
+#define ASN_PRIdMAX "lld"
+#else
+#define ASN_PRIuMAX "lu"
+#define ASN_PRIdMAX "ld"
+#endif
+#endif
+
+#endif	/* ASN_SYSTEM_H */