Linux中的C ++中的UDP套接字编程

Question

I am completely new to socket programming and beginner-intermediate in c++. I have written a code in c++ and also another application in java. The java program will get data from the c++ code which generates data in seconds. I am trying to use socket programming to transfer data between these two. I have found some code here: Socket programming tutorial . I am using the UDP java client from it. However, for the UDP server it only has the C code. I need to embed this code into my C++ app. therefore I need a c++ version of it. Can anyone help me with this? or give me a link that gives a tutorial on it. anyhow the C code is: udpserver.c

Answer 1

You must declare addr_len as socklen_t, not int.

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That is, the first few lines in main should read something like:

int sock;
int bytes_read; // <- note how this is now on its own line!
socklen_t addr_len; // <- and this too, with a different type.
char recv_data[1024];

... Leaving everything else as it were.