从客户端发送ASN1数据到服务器与插座 [英] Send asn1 data from client to server with socket

问题描述

我在C客户端写了这个code来获得一个int数，连接code，并通过socket发送

  INT clientNumber;
的printf（请输入一个数字：\\ n）;
scanf函数（％d个，＆安培; clientNumber）;
Message01_t * MESSAGE1;
MESSAGE1 =释放calloc（1，sizeof的（Message01_t））;
message1-＆GT;数= clientNumber;
字符缓冲区[BUFFERSIZE]
为size_t缓冲区长度= sizeof的（缓冲）;
der_en code_to_buffer（安培; asn_DEF_Message01，MESSAGE1，缓冲区，缓冲区长度）;
xer_fprint（标准输出，和放大器; asn_DEF_Message01，MESSAGE1）;如果（发送（to_server_socket，＆安培;！MESSAGE1，sizeof的（MESSAGE1），0）= sizeof的（MESSAGE1））{
的printf（套接字写入失败）;
 出口（-1）;
   }
 

所有看起来很好，我得到了输出

 输入一个数字：
  2
＆LT; Message01＆GT;
    ＆所述;数大于2＆下; /数＆GT;
＆LT; / Message01＆GT;
 

但在Java服务器我得到这个错误

 接收数据：B0 41 40 A1 B4
com.chaosinmotion.asn1.AsnFatalException：
 ＆GT;＆GT;在解码过程中，EN codeD标签字节数组中值不匹配与该对象的标签号！
    在com.turkcelltech.jac.Sequence.de code（Sequence.java:100）
    在ServiceRequest.run（ServiceRequest.java:30）这是服务器code
BerInputStream斌=接收（5）;
            Message01 msg01 =新Message01（）;
            msg01.de code（箱）;
            printMessage（msg01）;
 

解决方案

的问题是，您发送的结构（ MESSAGE1 ），而不是EN codeD缓冲。
C程序的最后部分更改为：

 如果（发送（to_server_socket，缓冲区，缓冲区长度，0）！=缓冲区长度）{
    的printf（套接字写入失败）;
    出口（-1）;
}
 

期待类似下面的字节（六） 30 03 02 01 02

序列

I wrote this code in the C client to get an int number , encode it and send it through socket

int clientNumber;
printf("Enter a number :\n  "); 
scanf("%d",&clientNumber);
Message01_t *message1;
message1 = calloc(1, sizeof(Message01_t));
message1->number= clientNumber;
char    buffer[BUFFERSIZE];
size_t  bufferLen = sizeof(buffer); 
der_encode_to_buffer(&asn_DEF_Message01, message1, buffer, bufferLen);
xer_fprint(stdout, &asn_DEF_Message01, message1);

if( send( to_server_socket, &message1, sizeof( message1 ), 0 ) != sizeof( message1) )     {
printf( "socket write failed");
 exit( -1 );
   }

All look fine , I got for output

Enter a number :
  2
<Message01>
    <number>2</number>
</Message01>

But in the java server I get this error

received data: B0 41 40 A1 B4 
com.chaosinmotion.asn1.AsnFatalException: 
 >> During decoding, the encoded tag value in the byte array does not match with this object's tag number ! 
    at com.turkcelltech.jac.Sequence.decode(Sequence.java:100)
    at ServiceRequest.run(ServiceRequest.java:30)

this is the server code 
BerInputStream bin = receive(5);
            Message01 msg01 = new Message01();
            msg01.decode(bin);
            printMessage(msg01);

解决方案

The problem is that you sent the structure (message1) instead of the encoded buffer. Change the last part of the C program to:

if( send( to_server_socket, buffer, bufferLen, 0 ) != bufferLen ) {
    printf( "socket write failed");
    exit( -1 );
}

Expect something like a sequence of the following bytes (hexa) 30 03 02 01 02

这篇关于从客户端发送ASN1数据到服务器与插座的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！