I was writing server side code which will be reading commands from a client over a Win32 socket, problematic code was like this
// suppose m_sock is a working socket, all we gotta do is start receiving data on it
const int nBuffSize = 256;
int nRecv = 0;
char * szCmdBuff = new char [nBuffSize];
memset(szCmdBuff, 0, nBuffSize);
while(1){
nRecv = recv(m_sock, szCmdBuff, nBuffSize, 0);
// do something with the data
memset(szCmdBuff, 0, nBuffSize);
}
Problem created by this code: Junk values in input.
Solution: do memset right before calling recv
Exact code to refresh things goes like this
while(1){
memset(szCmdBuff, 0, nBuffSize);
nRecv = recv(m_sock, szCmdBuff, nBuffSize, 0);
// do something with the data
memset(szCmdBuff, 0, nBuffSize);
}
TCP IP sockets are the foundation rock of http protocol, which is the core of internet today. Having a solid understanding of how TCP/IP sockets work is essential to solve network communications problems.
cheers all...
