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To make a long story short, Wireshark has a follow TCP stream feature, which is handy. The drawback is that the extracted stream data does not have time stamps and other information, in the analysis of data delay and packet loss is somewhat inadequate. In this case, a simple
Use python to implement wireshark's follow tcp stream function
In short, wireshark has a follow tcp stream function, which is very convenient. The disadvantage is that the extracted
link layer
Internet Protocol Version 4: Internet layer IP packet header information
Transmission Control Protocol: information about the data segment header of transport layer T, which is TCP
Hypertext Transfer Protocol: information of the application layer. This is the HTTP Protocol.
Wireshark and corresponding OSI Layer-7 Model
Specific content of the TCP pac
header information
Transmission Control Protocol: information about the data segment header of transport layer T, which is TCP
Hypertext Transfer Protocol: information of the application layer. This is the HTTP Protocol.
Wireshark and corresponding OSI Layer-7 Model
Specific content of the TCP package
Each field in the TCP
Turn from:Http://blog.chinaunix.net/uid-9112803-id-3212041.htmlSummary:In this paper, we briefly introduce the theory of TCP-oriented connection, describe the meanings of each field of TCP messages, and select TCP connections from Wireshark capture packet to establish the relevant message segment.I. OverviewTCP is a re
packet header informationTransmission Control Protocol: Data segment header information for the Transport layer T, here is the TCPHypertext Transfer Protocol: Application layer information, here is the HTTP protocolWireshark and corresponding OSI seven-layer modelSpecific contents of TCP packetsEach field in the TCP package that you can see from the Wireshark ca
packet header information
Transmission Control Protocol: information about the data segment header of transport layer T, which is TCP
Hypertext Transfer Protocol: information of the application layer. This is the HTTP Protocol.
Wireshark and corresponding OSI Layer-7 Model
Specific content of the TCP package
Each field in the
: information about the data segment header of transport layer T, which is TCP
Hypertext Transfer Protocol: information of the application layer. This is the HTTP Protocol.
Wireshark and corresponding OSI Layer-7 Model
Specific content of the TCP package
Each field in the TCP packet captured by
Abstract:
This article briefly introduces TCP connection-oriented theory, describes the meaning of each field of TCP packets in detail, and selects TCP connections from the wireshark capture group to establish relevant packet segments for analysis.
I. Overview
TCP is a reli
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This article briefly introduces TCP connection-oriented theory, describes the meaning of each field of TCP packets in detail, and selects TCP connections from the wireshark capture group to establish relevant packet segments for analysis.I. Overview
: Ethernet frame header information at the data link layer
Internet Protocol Version 4: Internet layer IP packet header information
Transmission Control Protocol: information about the data segment header of transport layer T, which is TCP
Hypertext Transfer Protocol:Information on the application layer, which is the HTTP protocol
Wireshark and corresponding OSI Layer-7 Model
Specific content of the
informationTransmission Control Protocol: Data segment header information for the Transport layer T, here is the TCPHypertext Transfer Protocol: Application layer information, here is the HTTP protocolWireshark and corresponding OSI seven-layer modelspecific contents of TCP packetsEach field in the TCP package that you can see from the Wireshark capture.example
header informationInternet Protocol Version 4: Internet Layer IP packet header informationTransmission Control Protocol: Data Segment header information for the Transport layer T, here is the TCPHypertext Transfer Protocol: application layer information, here is the HTTP protocolWireshark and corresponding OSI seven-layer modelSpecific contents of TCP packetsEach field in the TCP package that you can see
times the process of shaking hands.Open Wireshark, open browser input http://www.9upk.comEnter the HTTP filter in Wireshark, then select the record Get/tankxiao http/1.1, right-click on "Follow TCP Stream",The purpose of this is to get the data packets associated with the W
Summary: This paper introduces the knowledge of TCP-oriented connection theory, and describes the meanings of each field of TCP message. In this paper, a TCP connection is selected from the Wireshark capture packet to establish the relevant message segment.I. Overview TCP is
). TCP provides high reliability data communication for two hosts. His work involves dividing the data that the application gives to it into appropriate chunks to the network layer below, confirming the packets received, setting the timeout clock for sending the last confirmed packet, and so on. Because the transport layer provides high reliability end-to-end communication, the application layer can ignore all of these details. UDP, on the other hand,
Source: EMC Chinese support forum
TCP detects packet loss through the sliding window mechanism and adjusts the data transmission rate when packet loss occurs. The sliding window mechanism uses the Receiving Window of the data receiver to control the data stream.
The receiving window value is specified by the data receiver. It is stored in the TCP packet header in
The serial number (sequence number) in a TCP packet is not numbered by the packet segment. Instead, all the data transmitted during the connection life cycle is treated as a byte stream, the serial number is the number of each byte in the entire byte stream. A tcp data packet contains data of multiple byte streams (tha
The structure of the Ethernet message is as follows:wherein, the Ethernet frame header:Bytes:mac Destination Address 48bit (6B), Mac Source address 48bit (6B), type domain 2B, altogether 14B.IP header:TCP Header:Http://blog.163.com/[email protected]/blog/static/618945432011101110497885/Http://www.cnblogs.com/zhuzhu2016/p/5797534.htmlThat is, the header of the message has a total of 54 bytes. The following is a simple HTTP request to view the actual status of Ethernet messages, as follows:The con
cannot be received in time, the message segment will be re-sent. TCP will keep its header and data checked and. This is an end-to-end test and is designed to detect any changes in the data during transmission. If the test and errors are received, TCP discards the segment and does not acknowledge receipt of this segment (expecting the originator to timeout and re-send). Since
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