网络协议帧格式

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1、TCP_DATA_FRAME0ETH_HEADER_SIZE=14bytesDestinationMACaddressETH_DA_OFS001122334455SourceMACaddressETH_SA_OFS06172839410511TypefieldETH_TYPE_OFS012113ETH_DATA_OFSIP_HEADER_SIZE20bytesVersion,HeaderLength,TypeofServiceIP_VER_IHL_TOS_OFS014115IPFrame'sTotalLengthIP_TOTAL_LENGTH_OFS2

2、16317IdentifyingValueIP_IDENT_OFS418519FlagsandFragmentOffsetIP_FLAGS_FRAG_OFS620721Frame'sTimetoLive,ProtocolIP_TTL_PROT_OFS822923IPFrame'sHeaderChecksumIP_HEAD_CHKSUM_OFS10241125SourceAddressIP_SOURCE_OFS1226132714281529DestinationAddressIP_DESTINATION_OFS1630173118321933IP_DA

3、TA_OFSTCP_HEADER_SIZE=20bytesSourcePortTCP_SRCPORT_OFS034135DestinationPortTCP_DESTPORT_OFS236337SequenceNumberTCP_SEQNR_OFS438539640741AcknowledgeNumberTCP_ACKNR_OFS84294310441145DataOffsetandControlBitsTCP_DATA_CODE_OFS12461347WindowSizeTCP_WINDOW_OFS14481549ChecksumFieldTCP_C

4、HKSUM_OFS16501751UrgentPointerTCP_URGENT_OFS18521953TCP_DATA_OFSTCPTxDataCountMAX_TCP_TX_DATA_SIZE=768bytes054155：：：：766820767821ICMP_ECHO_REPLY_FRAME0ETH_HEADER_SIZE=14bytesDestinationMACaddressETH_DA_OFS001122334455SourceMACaddressETH_SA_OFS06172839410511TypefieldETH_TYPE_OFS0

5、12113ETH_DATA_OFSIP_HEADER_SIZE20bytesVersion,HeaderLength,TypeofServiceIP_VER_IHL_TOS_OFS014115IPFrame'sTotalLengthIP_TOTAL_LENGTH_OFS216317IdentifyingValueIP_IDENT_OFS418519FlagsandFragmentOffsetIP_FLAGS_FRAG_OFS620721Frame'sTimetoLive,ProtocolIP_TTL_PROT_OFS822923IPFrame'sHea

6、derChecksumIP_HEAD_CHKSUM_OFS10241125SourceAddressIP_SOURCE_OFS1226132714281529DestinationAddressIP_DESTINATION_OFS1630173118321933IP_DATA_OFSICMP_HEADER_SIZE=4bytestypeofmessageICMP_TYPE_CODE_OFS034135checksumofICMPmessageICMP_CHKSUM_OFS236337ICMP_DATA_OFSICMPDataCountMax=744by

7、tes38：：：：781ARP_ANSWER_FRAME0ETH_HEADER_SIZE=14bytesDestinationMACaddressETH_DA_OFS001122334455SourceMACaddressETH_SA_OFS06172839410511TypefieldETH_TYPE_OFS012113ETH_DATA_OFSARP_FRAME_SIZE=28bytesHardwareaddresstypeARP_HARDW_OFS014115ProtocolARP_PROT_OFS216317bytelengthofeachhar

8、dwARP_HLEN_PLEN_OFS418519OpcodeARP_OPCODE_OFS62