8583报文及各域详解
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[精彩] 8583问题
作者:lcunix发表于：2006-02-19 00:03:51
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各位高手能否详细的解释一下8583协议
htldm回复于：2003-08-31 22:15:18
ISO8583包（简称8583包）是一个国际标准的包格式，最多由128个字段域组成，每个域都有统一的规定，并有定长与变长之分。8583包前面一段为位图，用来确定包的字段域组成情况。
其中位图是8583包的灵魂，它是打包解包确定字段域的关键，而了解每个字段域的属性则是填写数据的基础，
1、位图描述如下：
位图位置：1
格式：定长
类型：B16（二进制16位，16*8=128bit）
描述：
如将位图的第一位设为'1'，表示使用扩展位图（128个域），否则表示只使用基本位图（64个域）。
如使用某数据域，应在位图中将相应的位设位'1'，如使用41域，需将位图的41位设为'1'。选用条件：如使用65到128域，需设位图域第一位为'1'
2、每个域的定义如下：
typedef struct ISO8583
{
int bit_flag; /*域数据类型0 -- string, 1 -- int, 2 -- binary*/
char *data_name; /*域名*/
int length; /*数据域长度*/
int length_in_byte;/*实际长度（如果是变长）*/
int variable_flag; /*是否变长标志0：否2：2位变长,
3：3位变长*/
int datatyp; /*0 -- string, 1 -- int, 2 -- binary*/
char *data; /*存放具体值*/
int attribute; /*保留*/
} ISO8583;
ISO8583 Tbl8583[128] =
{
/* FLD 1 */ {0,"BIT MAP,EXTENDED ", 8, 0, 0, 2, NULL,0},
/* FLD 2 */ {0,"PRIMARY ACCOUNT NUMBER ", 22, 0, 2, 0, NULL,0},
/* FLD 3 */ {0,"PROCESSING CODE ", 6, 0, 0, 0, NULL,0},
/* FLD 4 */ {0,"AMOUNT, TRANSACTION ", 12, 0, 0, 1, NULL,0},
/* FLD 5 */ {0,"NO USE ", 12, 0, 0, 0, NULL,0},
/* FLD 6 */ {0,"NO USE ", 12, 0, 0, 0, NULL,0},
/* FLD 7 */ {0,"TRANSACTION DATE AND TIME ", 10, 0, 0, 0, NULL,0},
/* FLD 8 */ {0,"NO USE ", 8, 0, 0, 0, NULL,0},
/* FLD 9 */ {0,"NO USE ", 8, 0, 0, 0, NULL,0},
/* FLD 10 */ {0,"NO USE ", 8, 0, 0, 0, NULL,0},
/* FLD 11 */ {0,"SYSTEM TRACE AUDIT NUMBER ", 6, 0, 0, 1, NULL,0},
/* FLD 12 */ {0,"TIME, LOCAL TRANSACTION ", 6, 0, 0, 0, NULL,0}, /* FLD 13 */ {0,"DATE, LOCAL TRANSACTION ", 4, 0, 0, 0, NULL,0}, /* FLD 14 */ {0,"DATE, EXPIRATION ", 4, 0, 0, 0, NULL,0},
/* FLD 15 */ {0,"DATE, SETTLEMENT ", 4, 0, 0, 0, NULL,0},
/* FLD 16 */ {0,"NO USE ", 4, 0, 0, 0, NULL,0},
/* FLD 17 */ {0,"DATE, CAPTURE ", 4, 0, 0, 0, NULL,0},
/* FLD 18 */ {0,"MERCHANT'S TYPE ", 4, 0, 0, 0, NULL,0},
/* FLD 19 */ {0,"NO USE ", 3, 0, 0, 0, NULL,0},
/* FLD 20 */ {0,"NO USE ", 3, 0, 0, 0, NULL,0},
/* FLD 21 */ {0,"NO USE ", 3, 0, 0, 0, NULL,0},
/* FLD 22 */ {0,"POINT OF SERVICE ENTRY MODE ", 3, 0, 0, 0, NULL, 0},
/* FLD 23 */ {0,"NO USE ", 3, 0, 0, 0, NULL,0},
/* FLD 24 */ {0,"NO USE ", 3, 0, 0, 0, NULL,0},
/* FLD 25 */ {0,"POINT OF SERVICE CONDITION CODE ", 2, 0, 0, 0, N ULL,0},
/* FLD 26 */ {0,"NO USE ", 2, 0, 0, 0, NULL,0},
/* FLD 27 */ {0,"NO USE ", 1, 0, 0, 0, NULL,0},
/* FLD 28 */ {0,"field27 ", 6, 0, 0, 0, NULL,0},
/* FLD 29 */ {0,"NO USE ", 8, 0, 1, 0, NULL,0},
/* FLD 30 */ {0,"NO USE ", 8, 0, 1, 0, NULL,0},
/* FLD 31 */ {0,"NO USE ", 8, 0, 1, 0, NULL,0},
/* FLD 32 */ {0,"ACQUIRER INSTITUTION ID. CODE ", 11, 0, 2, 0, NUL L,0},
/* FLD 33 */ {0,"FORWARDING INSTITUTION ID. CODE ", 11, 0, 2, 0, N ULL,0},
/* FLD 34 */ {0,"NO USE ", 28, 0, 2, 0, NULL,0},
/* FLD 35 */ {0,"TRACK 2 DATA ", 37, 0, 2, 0, NULL,0},
/* FLD 36 */ {0,"TRACK 3 DATA ",104, 0, 3, 0, NULL,0},
/* FLD 37 */ {0,"RETRIEVAL REFERENCE NUMBER ", 12, 0, 0, 0, NULL,0} ,
/* FLD 38 */ {0,"AUTH. IDENTIFICATION RESPONSE ", 6, 0, 0, 0, NULL,