diff --git a/src/util-byte.c b/src/util-byte.c
index 2676607666..72ed4bf583 100644
--- a/src/util-byte.c
+++ b/src/util-byte.c
@@ -182,7 +182,7 @@ int ByteExtractUint16(uint16_t *res, int e, uint16_t len, const uint8_t *bytes)
     return ret;
 }
 
-int ByteExtractString(uint64_t *res, int base, uint16_t len, const char *str, bool strict)
+int ByteExtractString(uint64_t *res, int base, size_t len, const char *str, bool strict)
 {
     const char *ptr = str;
     char *endptr = NULL;
@@ -231,12 +231,12 @@ int ByteExtractString(uint64_t *res, int base, uint16_t len, const char *str, bo
     return (endptr - ptr);
 }
 
-int ByteExtractStringUint64(uint64_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringUint64(uint64_t *res, int base, size_t len, const char *str)
 {
     return ByteExtractString(res, base, len, str, false);
 }
 
-int ByteExtractStringUint32(uint32_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringUint32(uint32_t *res, int base, size_t len, const char *str)
 {
     uint64_t i64;
 
@@ -259,7 +259,7 @@ int ByteExtractStringUint32(uint32_t *res, int base, uint16_t len, const char *s
     return ret;
 }
 
-int ByteExtractStringUint16(uint16_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringUint16(uint16_t *res, int base, size_t len, const char *str)
 {
     uint64_t i64;
 
@@ -282,7 +282,7 @@ int ByteExtractStringUint16(uint16_t *res, int base, uint16_t len, const char *s
     return ret;
 }
 
-int ByteExtractStringUint8(uint8_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringUint8(uint8_t *res, int base, size_t len, const char *str)
 {
     uint64_t i64;
 
@@ -305,12 +305,12 @@ int ByteExtractStringUint8(uint8_t *res, int base, uint16_t len, const char *str
     return ret;
 }
 
-int StringParseUint64(uint64_t *res, int base, uint16_t len, const char *str)
+int StringParseUint64(uint64_t *res, int base, size_t len, const char *str)
 {
     return ByteExtractString(res, base, len, str, true);
 }
 
-int StringParseUint32(uint32_t *res, int base, uint16_t len, const char *str)
+int StringParseUint32(uint32_t *res, int base, size_t len, const char *str)
 {
     uint64_t i64;
 
@@ -333,7 +333,7 @@ int StringParseUint32(uint32_t *res, int base, uint16_t len, const char *str)
     return ret;
 }
 
-int StringParseUint16(uint16_t *res, int base, uint16_t len, const char *str)
+int StringParseUint16(uint16_t *res, int base, size_t len, const char *str)
 {
     uint64_t i64;
 
@@ -356,7 +356,7 @@ int StringParseUint16(uint16_t *res, int base, uint16_t len, const char *str)
     return ret;
 }
 
-int StringParseUint8(uint8_t *res, int base, uint16_t len, const char *str)
+int StringParseUint8(uint8_t *res, int base, size_t len, const char *str)
 {
     uint64_t i64;
 
@@ -379,8 +379,8 @@ int StringParseUint8(uint8_t *res, int base, uint16_t len, const char *str)
     return ret;
 }
 
-int StringParseU64RangeCheck(uint64_t *res, int base, uint16_t len, const char *str,
-                             uint64_t min, uint64_t max)
+int StringParseU64RangeCheck(
+        uint64_t *res, int base, size_t len, const char *str, uint64_t min, uint64_t max)
 {
     uint64_t u64;
 
@@ -398,8 +398,8 @@ int StringParseU64RangeCheck(uint64_t *res, int base, uint16_t len, const char *
     return ret;
 }
 
-int StringParseU32RangeCheck(uint32_t *res, int base, uint16_t len, const char *str,
-                             uint32_t min, uint32_t max)
+int StringParseU32RangeCheck(
+        uint32_t *res, int base, size_t len, const char *str, uint32_t min, uint32_t max)
 {
     uint64_t u64;
 
@@ -426,8 +426,8 @@ int StringParseU32RangeCheck(uint32_t *res, int base, uint16_t len, const char *
     return ret;
 }
 
-int StringParseU16RangeCheck(uint16_t *res, int base, uint16_t len, const char *str,
-                             uint16_t min, uint16_t max)
+int StringParseU16RangeCheck(
+        uint16_t *res, int base, size_t len, const char *str, uint16_t min, uint16_t max)
 {
     uint64_t u64;
 
@@ -454,8 +454,8 @@ int StringParseU16RangeCheck(uint16_t *res, int base, uint16_t len, const char *
     return ret;
 }
 
-int StringParseU8RangeCheck(uint8_t *res, int base, uint16_t len, const char *str,
-                            uint8_t min, uint8_t max)
+int StringParseU8RangeCheck(
+        uint8_t *res, int base, size_t len, const char *str, uint8_t min, uint8_t max)
 {
     uint64_t u64;
 
@@ -482,7 +482,7 @@ int StringParseU8RangeCheck(uint8_t *res, int base, uint16_t len, const char *st
     return ret;
 }
 
-int ByteExtractStringSigned(int64_t *res, int base, uint16_t len, const char *str, bool strict)
+int ByteExtractStringSigned(int64_t *res, int base, size_t len, const char *str, bool strict)
 {
     const char *ptr = str;
     char *endptr;
@@ -528,12 +528,12 @@ int ByteExtractStringSigned(int64_t *res, int base, uint16_t len, const char *st
     return (endptr - ptr);
 }
 
-int ByteExtractStringInt64(int64_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringInt64(int64_t *res, int base, size_t len, const char *str)
 {
     return ByteExtractStringSigned(res, base, len, str, false);
 }
 
-int ByteExtractStringInt32(int32_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringInt32(int32_t *res, int base, size_t len, const char *str)
 {
     int64_t i64;
     int ret;
@@ -557,7 +557,7 @@ int ByteExtractStringInt32(int32_t *res, int base, uint16_t len, const char *str
     return ret;
 }
 
-int ByteExtractStringInt16(int16_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringInt16(int16_t *res, int base, size_t len, const char *str)
 {
     int64_t i64;
     int ret;
@@ -581,7 +581,7 @@ int ByteExtractStringInt16(int16_t *res, int base, uint16_t len, const char *str
     return ret;
 }
 
-int ByteExtractStringInt8(int8_t *res, int base, uint16_t len, const char *str)
+int ByteExtractStringInt8(int8_t *res, int base, size_t len, const char *str)
 {
     int64_t i64;
     int ret;
@@ -605,12 +605,12 @@ int ByteExtractStringInt8(int8_t *res, int base, uint16_t len, const char *str)
     return ret;
 }
 
-int StringParseInt64(int64_t *res, int base, uint16_t len, const char *str)
+int StringParseInt64(int64_t *res, int base, size_t len, const char *str)
 {
     return ByteExtractStringSigned(res, base, len, str, true);
 }
 
-int StringParseInt32(int32_t *res, int base, uint16_t len, const char *str)
+int StringParseInt32(int32_t *res, int base, size_t len, const char *str)
 {
     int64_t i64;
     int ret;
@@ -634,7 +634,7 @@ int StringParseInt32(int32_t *res, int base, uint16_t len, const char *str)
     return ret;
 }
 
-int StringParseInt16(int16_t *res, int base, uint16_t len, const char *str)
+int StringParseInt16(int16_t *res, int base, size_t len, const char *str)
 {
     int64_t i64;
     int ret;
@@ -658,7 +658,7 @@ int StringParseInt16(int16_t *res, int base, uint16_t len, const char *str)
     return ret;
 }
 
-int StringParseInt8(int8_t *res, int base, uint16_t len, const char *str)
+int StringParseInt8(int8_t *res, int base, size_t len, const char *str)
 {
     int64_t i64;
     int ret;
@@ -682,8 +682,8 @@ int StringParseInt8(int8_t *res, int base, uint16_t len, const char *str)
     return ret;
 }
 
-int StringParseI64RangeCheck(int64_t *res, int base, uint16_t len, const char *str,
-                             int64_t min, int64_t max)
+int StringParseI64RangeCheck(
+        int64_t *res, int base, size_t len, const char *str, int64_t min, int64_t max)
 {
     int64_t i64;
     int ret;
@@ -701,8 +701,8 @@ int StringParseI64RangeCheck(int64_t *res, int base, uint16_t len, const char *s
     return ret;
 }
 
-int StringParseI32RangeCheck(int32_t *res, int base, uint16_t len, const char *str,
-                             int32_t min, int32_t max)
+int StringParseI32RangeCheck(
+        int32_t *res, int base, size_t len, const char *str, int32_t min, int32_t max)
 {
     int64_t i64;
     int ret;
@@ -730,8 +730,8 @@ int StringParseI32RangeCheck(int32_t *res, int base, uint16_t len, const char *s
     return ret;
 }
 
-int StringParseI16RangeCheck(int16_t *res, int base, uint16_t len, const char *str,
-                             int16_t min, int16_t max)
+int StringParseI16RangeCheck(
+        int16_t *res, int base, size_t len, const char *str, int16_t min, int16_t max)
 {
     int64_t i64;
     int ret;
@@ -759,8 +759,8 @@ int StringParseI16RangeCheck(int16_t *res, int base, uint16_t len, const char *s
     return ret;
 }
 
-int StringParseI8RangeCheck(int8_t *res, int base, uint16_t len, const char *str,
-                            int8_t min, int8_t max)
+int StringParseI8RangeCheck(
+        int8_t *res, int base, size_t len, const char *str, int8_t min, int8_t max)
 {
     int64_t i64;
     int ret;
diff --git a/src/util-byte.h b/src/util-byte.h
index ce71353dbb..5aa414d625 100644
--- a/src/util-byte.h
+++ b/src/util-byte.h
@@ -134,7 +134,7 @@ int ByteExtractUint16(uint16_t *res, int e, uint16_t len, const uint8_t *bytes);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractString(uint64_t *res, int base, uint16_t len, const char *str, bool strict);
+int ByteExtractString(uint64_t *res, int base, size_t len, const char *str, bool strict);
 
 /**
  * Extract unsigned integer value from a string as uint64_t.
@@ -147,7 +147,7 @@ int ByteExtractString(uint64_t *res, int base, uint16_t len, const char *str, bo
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringUint64(uint64_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringUint64(uint64_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint32_t.
@@ -160,7 +160,7 @@ int ByteExtractStringUint64(uint64_t *res, int base, uint16_t len, const char *s
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringUint32(uint32_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringUint32(uint32_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint16_t.
@@ -173,7 +173,7 @@ int ByteExtractStringUint32(uint32_t *res, int base, uint16_t len, const char *s
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringUint16(uint16_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringUint16(uint16_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint8_t.
@@ -186,7 +186,7 @@ int ByteExtractStringUint16(uint16_t *res, int base, uint16_t len, const char *s
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringUint8(uint8_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringUint8(uint8_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string.
@@ -200,7 +200,7 @@ int ByteExtractStringUint8(uint8_t *res, int base, uint16_t len, const char *str
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringSigned(int64_t *res, int base, uint16_t len, const char *str, bool strict);
+int ByteExtractStringSigned(int64_t *res, int base, size_t len, const char *str, bool strict);
 
 /**
  * Extract signed integer value from a string as uint64_t.
@@ -213,7 +213,7 @@ int ByteExtractStringSigned(int64_t *res, int base, uint16_t len, const char *st
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringInt64(int64_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringInt64(int64_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string as uint32_t.
@@ -226,7 +226,7 @@ int ByteExtractStringInt64(int64_t *res, int base, uint16_t len, const char *str
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringInt32(int32_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringInt32(int32_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string as uint16_t.
@@ -239,7 +239,7 @@ int ByteExtractStringInt32(int32_t *res, int base, uint16_t len, const char *str
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringInt16(int16_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringInt16(int16_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string as uint8_t.
@@ -252,7 +252,7 @@ int ByteExtractStringInt16(int16_t *res, int base, uint16_t len, const char *str
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int ByteExtractStringInt8(int8_t *res, int base, uint16_t len, const char *str);
+int ByteExtractStringInt8(int8_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint64_t strictly.
@@ -265,7 +265,7 @@ int ByteExtractStringInt8(int8_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseUint64(uint64_t *res, int base, uint16_t len, const char *str);
+int StringParseUint64(uint64_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint32_t strictly.
@@ -278,7 +278,7 @@ int StringParseUint64(uint64_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseUint32(uint32_t *res, int base, uint16_t len, const char *str);
+int StringParseUint32(uint32_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint16_t strictly.
@@ -291,7 +291,7 @@ int StringParseUint32(uint32_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseUint16(uint16_t *res, int base, uint16_t len, const char *str);
+int StringParseUint16(uint16_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint8_t strictly.
@@ -304,7 +304,7 @@ int StringParseUint16(uint16_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseUint8(uint8_t *res, int base, uint16_t len, const char *str);
+int StringParseUint8(uint8_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string as int64_t strictly.
@@ -317,7 +317,7 @@ int StringParseUint8(uint8_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseInt64(int64_t *res, int base, uint16_t len, const char *str);
+int StringParseInt64(int64_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string as int32_t strictly.
@@ -330,7 +330,7 @@ int StringParseInt64(int64_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseInt32(int32_t *res, int base, uint16_t len, const char *str);
+int StringParseInt32(int32_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string as int16_t strictly.
@@ -343,7 +343,7 @@ int StringParseInt32(int32_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseInt16(int16_t *res, int base, uint16_t len, const char *str);
+int StringParseInt16(int16_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract signed integer value from a string as int8_t strictly.
@@ -356,7 +356,7 @@ int StringParseInt16(int16_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int StringParseInt8(int8_t *res, int base, uint16_t len, const char *str);
+int StringParseInt8(int8_t *res, int base, size_t len, const char *str);
 
 /**
  * Extract unsigned integer value from a string as uint64_t strictly within the range.
@@ -369,7 +369,8 @@ int StringParseInt8(int8_t *res, int base, uint16_t len, const char *str);
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseU64RangeCheck(uint64_t *res, int base, uint16_t len, const char *str, uint64_t min, uint64_t max);
+int WARN_UNUSED StringParseU64RangeCheck(
+        uint64_t *res, int base, size_t len, const char *str, uint64_t min, uint64_t max);
 
 /**
  * Extract unsigned integer value from a string as uint32_t strictly within the range.
@@ -382,7 +383,8 @@ int WARN_UNUSED StringParseU64RangeCheck(uint64_t *res, int base, uint16_t len,
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseU32RangeCheck(uint32_t *res, int base, uint16_t len, const char *str, uint32_t min, uint32_t max);
+int WARN_UNUSED StringParseU32RangeCheck(
+        uint32_t *res, int base, size_t len, const char *str, uint32_t min, uint32_t max);
 
 /**
  * Extract unsigned integer value from a string as uint16_t strictly within the range.
@@ -395,7 +397,8 @@ int WARN_UNUSED StringParseU32RangeCheck(uint32_t *res, int base, uint16_t len,
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseU16RangeCheck(uint16_t *res, int base, uint16_t len, const char *str, uint16_t min, uint16_t max);
+int WARN_UNUSED StringParseU16RangeCheck(
+        uint16_t *res, int base, size_t len, const char *str, uint16_t min, uint16_t max);
 
 /**
  * Extract unsigned integer value from a string as uint8_t strictly within the range.
@@ -408,7 +411,8 @@ int WARN_UNUSED StringParseU16RangeCheck(uint16_t *res, int base, uint16_t len,
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseU8RangeCheck(uint8_t *res, int base, uint16_t len, const char *str, uint8_t min, uint8_t max);
+int WARN_UNUSED StringParseU8RangeCheck(
+        uint8_t *res, int base, size_t len, const char *str, uint8_t min, uint8_t max);
 
 /**
  * Extract signed integer value from a string as int64_t strictly within the range.
@@ -421,7 +425,8 @@ int WARN_UNUSED StringParseU8RangeCheck(uint8_t *res, int base, uint16_t len, co
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseI64RangeCheck(int64_t *res, int base, uint16_t len, const char *str, int64_t min, int64_t max);
+int WARN_UNUSED StringParseI64RangeCheck(
+        int64_t *res, int base, size_t len, const char *str, int64_t min, int64_t max);
 
 /**
  * Extract signed integer value from a string as int32_t strictly within the range.
@@ -434,7 +439,8 @@ int WARN_UNUSED StringParseI64RangeCheck(int64_t *res, int base, uint16_t len, c
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseI32RangeCheck(int32_t *res, int base, uint16_t len, const char *str, int32_t min, int32_t max);
+int WARN_UNUSED StringParseI32RangeCheck(
+        int32_t *res, int base, size_t len, const char *str, int32_t min, int32_t max);
 
 /**
  * Extract signed integer value from a string as int16_t strictly within the range.
@@ -447,7 +453,8 @@ int WARN_UNUSED StringParseI32RangeCheck(int32_t *res, int base, uint16_t len, c
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseI16RangeCheck(int16_t *res, int base, uint16_t len, const char *str, int16_t min, int16_t max);
+int WARN_UNUSED StringParseI16RangeCheck(
+        int16_t *res, int base, size_t len, const char *str, int16_t min, int16_t max);
 
 /**
  * Extract signed integer value from a string as int8_t strictly within the range.
@@ -460,7 +467,8 @@ int WARN_UNUSED StringParseI16RangeCheck(int16_t *res, int base, uint16_t len, c
  * \return n Number of bytes extracted on success
  * \return -1 On error
  */
-int WARN_UNUSED StringParseI8RangeCheck(int8_t *res, int base, uint16_t len, const char *str, int8_t min, int8_t max);
+int WARN_UNUSED StringParseI8RangeCheck(
+        int8_t *res, int base, size_t len, const char *str, int8_t min, int8_t max);
 
 #ifdef UNITTESTS
 void ByteRegisterTests(void);