node中有没有对应C中结构体变量的处理
发布于 2 年前 作者 MaskWu 2044 次浏览 来自 问答

项目中需要对接受到buffer进行处理,示例C代码中有结构体变量的处理(我也把C忘得差不多了), 现在想用node对buffer进行一个响应的处理,在npm上找了一个C-struct和struct的包尝试了一下,发现读出的数据仍然是有错误,想请问下有没有人对这个处理过,处理的方法

C 代码:

//对接受的数据进行处理
struct cliprobe_data {
        unsigned char Apmac[6];
        unsigned short int Vendorid;
        unsigned short int Reserved1;
        unsigned char Bssid[6];
        unsigned char Radiotype;
        unsigned char Channel;
        unsigned char Associated;
        unsigned char Messagetype;
        char Timestamp[14];
        unsigned short int Reserved2;
        unsigned char Mutype;
        unsigned short int Reserved3;
        char Rssi;
        unsigned short int Reserved4;
        unsigned char Noisefloor;
        unsigned short int Reserved5;
        unsigned char Datarate;
        unsigned char MPDUflags;
        unsigned char Mumac[6];
        unsigned short int Framecontrol;
        unsigned short int Sequencecontrol;
        unsigned short int Reserved6;
};
package_data = (struct cliprobe_data *) buffer;//相当于格式化了buffer?

对应的C-Struct包中的声明:

var MacSchema = new _.Schema({
    Apmac:_.type.string(6),
    Vendorid:_.type.uint16,
    Reserved1:_.type.uint16,
    Bssid:_.string(6),
    Radiotype:_.type.uint8,
    Channel:_.type.uint8,
    Associated:_.type.uint8,
    Messagetype:_.type.uint8,
    Timestamp:_.string(14),
    Reserved2:_.type.uint16,
    Mutype:_.type.uint8,
    Reserved3:_.type.uint16,
    Rssi:_.type.uint8,
    Reserved4:_.type.uint16,
    Noisefloor:_.type.uint8,
    Reserved5:_.type.uint16,
    Datarate:_.type.uint8,
    MPDUflags:_.type.uint8,
    Mumac:_.type.string(6),
    Framecontrol:_.type.uint16,
    Sequencecontrol:_.type.uint16,
    Reserved6:_.type.uint16
});
1 回复

node的buffer类型数据里面就是纯粹的二进制数据,如果你已经有C结构体的定义,相当于有了一份数据解析协议,遍历这份数据,按每个字段的大小和类型去解析就可以了,具体API可以参考node Buffer相关文档。

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