diff --git a/lib/logstash/codecs/sflow.rb b/lib/logstash/codecs/sflow.rb
index 852797e..ea664db 100644
--- a/lib/logstash/codecs/sflow.rb
+++ b/lib/logstash/codecs/sflow.rb
@@ -59,25 +59,25 @@ def assign_key_value(event, bindata_kv)
   # @param [Object] sample
   # @param [Object] record
   def common_sflow(event, decoded, sample)
-    event.set('agent_ip', decoded['agent_ip'].to_s)
+    event.set('deviceIp', decoded['deviceIp'].to_s)
     assign_key_value(event, decoded)
     assign_key_value(event, sample)
   end
 
   def snmp_call(event)
     if @snmp_interface
-      if event.include?('source_id_type') and event.get('source_id_type').to_s == '0'
-        if event.include?('source_id_index')
-          event.set('source_id_index_descr', @snmp.get_interface(event.get('agent_ip'), event.get('source_id_index')))
+      if event.include?('sourceIdType') and event.get('sourceIdType').to_s == '0'
+        if event.include?('sourceIdIndex')
+          event.set('source_id_index_descr', @snmp.get_interface(event.get('deviceIp'), event.get('sourceIdIndex')))
         end
-        if event.include?('input_interface')
-          event.set('input_interface_descr', @snmp.get_interface(event.get('agent_ip'), event.get('input_interface')))
+        if event.include?('input')
+          event.set('input_interface_descr', @snmp.get_interface(event.get('deviceIp'), event.get('input')))
         end
-        if event.include?('output_interface')
-          event.set('output_interface_descr', @snmp.get_interface(event.get('agent_ip'), event.get('output_interface')))
+        if event.include?('output')
+          event.set('output_interface_descr', @snmp.get_interface(event.get('deviceIp'), event.get('output')))
         end
         if event.include?('interface_index')
-          event.set('interface_index_descr', @snmp.get_interface(event.get('agent_ip'), event.get('interface_index')))
+          event.set('interface_index_descr', @snmp.get_interface(event.get('deviceIp'), event.get('interface_index')))
         end
       end
     end
@@ -136,15 +136,18 @@ def decode(payload)
           assign_key_value(event, record)
 
         end
+		    #@author jeonhn
+        #@change-date : 2018. 7. 13.
         #compute frame_length_times_sampling_rate
-        if event.include?('frame_length') and event.include?('sampling_rate')
-          event.set('frame_length_times_sampling_rate', event.get('frame_length').to_i * event.get('sampling_rate').to_i)
+        #packets to frame_length
+        if event.include?('packets') and event.include?('samplingRate')
+				  event.set('octets', event.get('packets').to_i * event.get('samplingRate').to_i)
         end
 
         if sample['sample_format'] == 1
-          event.set('sflow_type', 'flow_sample')
+          event.set('sflowType', 'flow_sample')
         else
-          event.set('sflow_type', 'expanded_flow_sample')
+          event.set('sflowType', 'expanded_flow_sample')
         end
 
         #Get interface dfescr if snmp_interface true
@@ -154,6 +157,11 @@ def decode(payload)
 
       #treat counter flow and expanded counter flow
       elsif sample['sample_entreprise'] == 0 && (sample['sample_format'] == 2 || sample['sample_format'] == 4)
+		    #@author jeonhn
+        #@change-date : 2018. 7. 13.
+        #compute frame_length_times_sampling_rate
+        # continue
+          next
         sample['sample_data']['records'].each do |record|
           # Ensure that some data exist for the record
           if record['record_data'].to_s.eql? ''
@@ -168,9 +176,9 @@ def decode(payload)
           assign_key_value(event, record)
 
           if sample['sample_format'] == 2
-            event.set('sflow_type', 'counter_sample')
+            event.set('sflowType', 'counter_sample')
           else
-            event.set('sflow_type', 'expanded_counter_sample')
+            event.set('sflowType', 'expanded_counter_sample')
           end
 
 
diff --git a/lib/logstash/codecs/sflow/counter_record.rb b/lib/logstash/codecs/sflow/counter_record.rb
index 33738fe..21ad90b 100644
--- a/lib/logstash/codecs/sflow/counter_record.rb
+++ b/lib/logstash/codecs/sflow/counter_record.rb
@@ -89,7 +89,7 @@ class HundredBaseVG < BinData::Record
 # noinspection RubyResolve
 class Vlan < BinData::Record
   endian :big
-  uint32 :vlan_id
+  uint32 :vlanId
   uint64 :octets
   uint32 :ucastPkts
   uint32 :multicastPkts
diff --git a/lib/logstash/codecs/sflow/datagram.rb b/lib/logstash/codecs/sflow/datagram.rb
index 4d46111..25d514d 100644
--- a/lib/logstash/codecs/sflow/datagram.rb
+++ b/lib/logstash/codecs/sflow/datagram.rb
@@ -14,14 +14,14 @@ class SFlowHeader < BinData::Record
 class SFlow < BinData::Record
   endian :big
   uint32 :sflow_version
-  uint32 :ip_version
-  choice :agent_ip, :selection => :ip_version do
+  uint32 :ipVersion
+  choice :deviceIp, :selection => :ipVersion do
     sflow_ip4_addr 1
     sflow_ip6_addr 2
   end
-  uint32 :sub_agent_id
+  uint32 :subAgentId
   uint32 :sequence_number
-  uint32 :uptime_in_ms
+  uint32 :uptimeInMs
   uint32 :sample_count
   array :samples, :initial_length => :sample_count do
     bit20 :sample_entreprise
diff --git a/lib/logstash/codecs/sflow/flow_record.rb b/lib/logstash/codecs/sflow/flow_record.rb
index f9e8266..20de3d4 100644
--- a/lib/logstash/codecs/sflow/flow_record.rb
+++ b/lib/logstash/codecs/sflow/flow_record.rb
@@ -10,11 +10,14 @@ class RawPacketHeader < BinData::Buffer
   default_parameters :length => :record_length
 
   endian :big
-  uint32 :protocol
-  uint32 :frame_length
+  uint32 :headerProtocol
+  #@author jeonhn
+  #@change-date : 2018. 7. 13.
+  #@fix : packets to frame_length
+  uint32 :packets
   uint32 :stripped
   uint32 :header_size
-  choice :sample_header, :selection => :protocol do
+  choice :sample_header, :selection => :headerProtocol do
     ethernet_header 1, :size_header => lambda { header_size * 8 }
     ipv4_header 11, :size_header => lambda { header_size * 8 }
     ipv6_header 12, :size_header => lambda { header_size * 8 }
@@ -26,9 +29,9 @@ class RawPacketHeader < BinData::Buffer
 class EthernetFrameData < BinData::Record
   endian :big
   uint32 :packet_length
-  sflow_mac_address :src_mac
+  sflow_mac_address :srcMac
   skip :length => 2
-  sflow_mac_address :dst_mac
+  sflow_mac_address :dstMac
   skip :length => 2
   uint32 :eth_type
 end
@@ -37,12 +40,12 @@ class EthernetFrameData < BinData::Record
 class IP4Data < BinData::Record
   endian :big
   uint32 :ip_packet_length
-  uint32 :ip_protocol
-  sflow_ip4_addr :src_ip
-  sflow_ip4_addr :dst_ip
-  uint32 :src_port
-  uint32 :dst_port
-  uint32 :tcp_flags
+  uint32 :protocol
+  sflow_ip4_addr :srcIpv4
+  sflow_ip4_addr :dstIpv4
+  uint32 :srcPort
+  uint32 :dstPort
+  uint32 :tcpFlags
   uint32 :ip_type
 end
 
@@ -51,40 +54,40 @@ class IP6Data < BinData::Record
   endian :big
   uint32 :ip_packet_length
   uint32 :ip_next_header
-  sflow_ip6_addr :src_ip
-  sflow_ip6_addr :dst_ip
-  uint32 :src_port
-  uint32 :dst_port
-  uint32 :tcp_flags
+  sflow_ip6_addr :srcIpv6
+  sflow_ip6_addr :dstIpv6
+  uint32 :srcPort
+  uint32 :dstPort
+  uint32 :tcpFlags
   uint32 :ip_priority
 end
 
 # noinspection RubyResolve
 class ExtendedSwitchData < BinData::Record
   endian :big
-  uint32 :src_vlan
-  uint32 :src_priority
-  uint32 :dst_vlan
-  uint32 :dst_priority
+  uint32 :srcVlan
+  uint32 :srcPriority
+  uint32 :dstVlan
+  uint32 :dstPriority
 end
 
 # noinspection RubyResolve
 class ExtendedRouterData < BinData::Record
   endian :big
-  uint32 :ip_version
-  choice :ip_address_next_hop_router, :selection => :ip_version do
+  uint32 :ipVersion
+  choice :ip_address_next_hop_router, :selection => :ipVersion do
     sflow_ip4_addr 1
     sflow_ip6_addr 2
   end
-  uint32 :src_mask_len
-  uint32 :dst_mask_len
+  uint32 :srcMask
+  uint32 :dstMask
 end
 
 # noinspection RubyResolve
 class ExtendedGatewayData < BinData::Record
   endian :big
-  uint32 :ip_version
-  choice :ip_address_next_hop_router, :selection => :ip_version do
+  uint32 :ipVersion
+  choice :ip_address_next_hop_router, :selection => :ipVersion do
     sflow_ip4_addr 1
     sflow_ip6_addr 2
   end
@@ -122,8 +125,8 @@ class ExtendedUrlData < BinData::Record
 # noinspection RubyResolve
 class ExtendedMplsData < BinData::Record
   endian :big
-  uint32 :ip_version
-  choice :ip_address_next_hop_router, :selection => :ip_version do
+  uint32 :ipVersion
+  choice :ip_address_next_hop_router, :selection => :ipVersion do
     sflow_ip4_addr 1
     sflow_ip6_addr 2
   end
@@ -136,13 +139,13 @@ class ExtendedMplsData < BinData::Record
 # noinspection RubyResolve
 class ExtendedNatData < BinData::Record
   endian :big
-  uint32 :src_ip_version
-  choice :src_ip_address, :selection => :src_ip_version do
+  uint32 :srcIpVersion
+  choice :srcIpAddress, :selection => :srcIpVersion do
     sflow_ip4_addr 1
     sflow_ip6_addr 2
   end
-  uint32 :dst_ip_version
-  choice :dst_ip_address, :selection => :dst_ip_version do
+  uint32 :dstIpVersion
+  choice :dstIpAddress, :selection => :dstIpVersion do
     sflow_ip4_addr 1
     sflow_ip6_addr 2
   end
diff --git a/lib/logstash/codecs/sflow/packet_header.rb b/lib/logstash/codecs/sflow/packet_header.rb
index 769be06..166de95 100644
--- a/lib/logstash/codecs/sflow/packet_header.rb
+++ b/lib/logstash/codecs/sflow/packet_header.rb
@@ -18,8 +18,8 @@ class TcpHeader < BinData::Record
   mandatory_parameter :size_header
 
   endian :big
-  uint16 :src_port
-  uint16 :dst_port
+  uint16 :srcPort
+  uint16 :dstPort
   uint32 :tcp_seq_number
   uint32 :tcp_ack_number
   bit4 :tcp_header_length # times 4
@@ -51,8 +51,8 @@ class UdpHeader < BinData::Record
   mandatory_parameter :size_header
 
   endian :big
-  uint16 :src_port
-  uint16 :dst_port
+  uint16 :srcPort
+  uint16 :dstPort
   uint16 :udp_length
   uint16 :udp_checksum
   bit :data, :nbits => lambda { size_header - 64 } #skip udp data
@@ -63,7 +63,7 @@ class IPV4Header < BinData::Record
   mandatory_parameter :size_header
 
   endian :big
-  bit4 :ip_version
+  bit4 :ipVersion
   bit4 :ip_header_length # times 4
   bit6 :ip_dscp
   bit2 :ip_ecn
@@ -72,14 +72,14 @@ class IPV4Header < BinData::Record
   bit3 :ip_flags
   bit13 :ip_fragment_offset
   uint8 :ip_ttl
-  uint8 :ip_protocol
+  uint8 :protocol
   uint16 :ip_checksum
-  sflow_ip4_addr :src_ip
-  sflow_ip4_addr :dst_ip
-  array :ip_options, :initial_length => lambda { (((ip_header_length * 4) - 20)/4).ceil }, :onlyif => :is_options? do
+  sflow_ip4_addr :srcIpv4
+  sflow_ip4_addr :dstIpv4
+  array :ip_options, :initial_length => lambda { ip_header_length - 5 }, :onlyif => :is_options? do
     string :ip_option, :length => 4, :pad_byte => "\0"
   end
-  choice :ip_data, :selection => :ip_protocol, :onlyif => lambda { has_data?(size_header) } do
+  choice :ip_data, :selection => :protocol, :onlyif => lambda { has_data?(size_header) } do
     tcp_header 6, :size_header => lambda { size_header - (ip_header_length * 4 * 8) }
     udp_header 17, :size_header => lambda { size_header - (ip_header_length * 4 * 8) }
     unknown_header :default, :size_header => lambda { size_header - (ip_header_length * 4 * 8) }
@@ -87,7 +87,7 @@ class IPV4Header < BinData::Record
 
   def has_data?(size_header)
     bytes_left = size_header / 8 - ip_header_length * 4
-    case ip_protocol
+    case protocol
     when 6
       return bytes_left >= 20
     when 17
@@ -107,16 +107,16 @@ class IPV6Header < BinData::Record
   mandatory_parameter :size_header
 
   endian :big
-  bit4 :ip_version
+  bit4 :ipVersion
   bit6 :ip_dscp
   bit2 :ip_ecn
   bit20 :ipv6_flow_label
   uint16 :ip_payload_length
-  uint8 :ip_protocol
+  uint8 :protocol
   uint8 :ipv6_hop_limit
-  sflow_ip6_addr :src_ip
-  sflow_ip6_addr :dst_ip
-  choice :ip_data, :selection => :ip_protocol do
+  sflow_ip6_addr :srcIp
+  sflow_ip6_addr :dstIp
+  choice :ip_data, :selection => :protocol do
     tcp_header 6, :size_header => lambda { size_header - 320 }
     udp_header 17, :size_header => lambda { size_header - 320 }
     unknown_header :default, :size_header => lambda { size_header - 320 }
@@ -130,7 +130,7 @@ class VLANHeader < BinData::Record
   endian :big
   bit3 :vlan_priority
   bit1 :vlan_cfi
-  bit12 :vlan_id
+  bit12 :vlanId
   uint16 :vlan_type
   choice :vlan_data, :selection => :vlan_type do
     ipv4_header 2048, :size_header => lambda { size_header - (4 * 8) }
@@ -144,8 +144,8 @@ class EthernetHeader < BinData::Record
   mandatory_parameter :size_header
 
   endian :big
-  sflow_mac_address :eth_dst
-  sflow_mac_address :eth_src
+  sflow_mac_address :ethDst
+  sflow_mac_address :ethSrc
   uint16 :eth_type
   choice :eth_data, :selection => :eth_type do
     ipv4_header 2048, :size_header => lambda { size_header - (14 * 8) }
diff --git a/lib/logstash/codecs/sflow/sample.rb b/lib/logstash/codecs/sflow/sample.rb
index 2f39f0f..c9a3786 100644
--- a/lib/logstash/codecs/sflow/sample.rb
+++ b/lib/logstash/codecs/sflow/sample.rb
@@ -77,13 +77,13 @@ class CounterSampleRecordData < BinData::Choice
 class FlowSample < BinData::Record
   endian :big
   uint32 :flow_sequence_number
-  uint8 :source_id_type
-  uint24 :source_id_index
-  uint32 :sampling_rate
-  uint32 :sample_pool
+  uint8 :sourceIdType
+  uint24 :sourceIdIndex
+  uint32 :samplingRate
+  uint32 :samplingPool
   uint32 :drops
-  uint32 :input_interface
-  uint32 :output_interface
+  uint32 :input
+  uint32 :output
   uint32 :record_count
   array :records, :initial_length => :record_count do
     bit20 :record_entreprise
@@ -99,8 +99,8 @@ class FlowSample < BinData::Record
 class CounterSample < BinData::Record
   endian :big
   uint32 :sample_seq_number
-  uint8 :source_id_type
-  uint24 :source_id_index
+  uint8 :sourceIdType
+  uint24 :sourceIdIndex
   uint32 :record_count
   array :records, :initial_length => :record_count do
     bit20 :record_entreprise
@@ -117,15 +117,15 @@ class CounterSample < BinData::Record
 class ExpandedFlowSample < BinData::Record
   endian :big
   uint32 :flow_sequence_number
-  uint32 :source_id_type
-  uint32 :source_id_index
-  uint32 :sampling_rate
-  uint32 :sample_pool
+  uint32 :sourceIdType
+  uint32 :sourceIdIndex
+  uint32 :samplingRate
+  uint32 :samplePool
   uint32 :drops
-  uint32 :input_interface_format
-  uint32 :input_interface_value
-  uint32 :output_interface_format
-  uint32 :output_interface_value
+  uint32 :inputInterfaceFormat
+  uint32 :input
+  uint32 :outputInterfaceFormat
+  uint32 :output
   uint32 :record_count
   array :records, :initial_length => :record_count do
     bit20 :record_entreprise
@@ -141,8 +141,8 @@ class ExpandedFlowSample < BinData::Record
 class ExpandedCounterSample < BinData::Record
   endian :big
   uint32 :sample_seq_number
-  uint32 :source_id_type
-  uint32 :source_id_index
+  uint32 :sourceIdType
+  uint32 :sourceIdIndex
   uint32 :record_count
   array :records, :initial_length => :record_count do
     bit20 :record_entreprise