How to send java byte[] on tcp socket to c++ char[] on server?

Question

I want to send a byte[] array from a java client to a server that receives the data in C++. The byte array contains characters and integers that are converted to bytes (its a wave header). The server doesn't receive the values correctly. How can I send the byte[] so that the server socket can write it to a char[]? I am using the following code:

Client.java:

//Some example values in byte[]
byte[] bA = new byte[44];
bA[0]='R';
...
bA[4]=(byte)(2048 & 0xff);
...
bA[16] = 16;
....

//Write byte[] on socket
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
out.write(bA,0,44);

Server.cpp

int k = 0,n = 0;
char buffer[100];
ofstream wav("out.wav", ios::out | ios::binary);
while(k<44){//receive 44 values
    memset(buffer ,0 , 100);
    n = recv(sock , buffer , 100 , 0);
    k += n;
    buffer[99] = '\0';
    wav.write(buffer,n);
}

Answer 1

One issue I see is if you receive 100 characters, you're corrupting the data with this line:

buffer[99] = '\0';

If there is a character other than NULL at that position, you've corrupted the data. Since the data is binary, there is no need to null terminate the buffer . Remove that line from your loop.

Instead, rely on the return value of recv to determine the number of characters to copy to the stream. Which brings up another point -- you're not checking if recv returns an error.