The 8583 packet consists of 128 fields at most, and each field has a unified regulation, and there are fixed length and variable length points.

The first segment of the 8583 packet is a bitmap, which is used to determine the composition of the packets fields.

It is the key to packaging and unpacking to determine the field, and understanding the attributes of each field is the basis for filling in data.

The 8583 protocol is mostly used in the development of POS machines.

For example, the application of the returning customer member management system on the POS machine uses 8583 messages.

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The decoding diagram of the last ISOUtil packet unmarshalling tool: Among them, the length is determined by the header information, the specified length of the header is expressed in hexadecimal, and the decoded length is converted to decimal.

For example, if the length of the head is set: 006C, the length is 108.

Take 60 0145 0000 in the figure as an example, 60 is an ID identifier, 0145 generally corresponds to the value of the 24 field, and 0000 is the destination address (NII).

Introduction to the 8583 protocol Two, bitmap rules Three, 8583 format message reference Four, packageunpackage ideas Five, related code 1.

Between the respective computer devices you need to exchange dat.

At that time, the wafer of high security transactions was admitted.

This is the most common usage of a function and is a global call, so this represents the g.

Use this to implicitly pass an object reference to make the API more concise and easy to use Display delivery can.

Iso 8583 Bitmap Ascii