// Filename: tcpserverclass. HPP
# Ifndef tcpserverclass_hpp_included
# Define tcpserverclass_hpp_included
# Include <unistd. h>
# Include <iostream>
# Include <sys/socket. h>
# Include <ARPA/inet. h>
Class tcpserver
{
PRIVATE:
Int listensock;
Int communicationsock;
Sockaddr_in servaddr;
Sockaddr_in clntaddr;
Public:
Tcpserver (INT listen_port );
Bool isaccept ();
Void handleecho ();
};
# Endif // tcpserverclass_hpp_included
// Filename: tcpserverclass. cpp
# Include "tcpserverclass. HPP"
Tcpserver: tcpserver (INT listen_port)
{
If (listensock = socket (pf_inet, sock_stream, ipproto_tcp) <0 ){
Throw "socket () failed ";
}
Memset (& servaddr, 0, sizeof (servaddr ));
Servaddr. sin_family = af_inet;
Servaddr. sin_addr.s_addr = htonl (inaddr_any );
Servaddr. sin_port = htons (listen_port );
If (BIND (listensock, (sockaddr *) & servaddr, sizeof (servaddr) <0 ){
Throw "BIND () failed ";
}
If (Listen (listensock, 10) <0 ){
Throw "Listen () failed ";
}
}
Bool tcpserver: isaccept ()
{
Unsigned int clntaddrlen = sizeof (clntaddr );
If (communicationsock = accept (listensock, (sockaddr *) & clntaddr, & clntaddrlen) <0 ){
Return false;
} Else {
STD: cout <"client (IP:" <inet_ntoa (clntaddr. sin_addr) <") connected. \ n ";
Return true;
}
}
Void tcpserver: handleecho ()
{
Const int buffersize = 32;
Char buffer [buffersize];
Int recvmsgsize;
Bool goon = true;
While (goon = true ){
If (recvmsgsize = Recv (communicationsock, buffer, buffersize, 0) <0 ){
Throw "Recv () failed ";
} Else if (recvmsgsize = 0 ){
Goon = false;
} Else {
If (send (communicationsock, buffer, recvmsgsize, 0 )! = Recvmsgsize ){
Throw "Send () failed ";
}
}
}
Close (communicationsock );
}
Demo program:
// Filename: Main. cpp
// TCP server C ++ style, single work
# Include <iostream>
# Include "tcpserverclass. HPP"
Int echo_server (INT argc, char * argv []);
Int main (INT argc, char * argv [])
{
Int mainrtn = 0;
Try {
Mainrtn = echo_server (argc, argv );
}
Catch (const char * s ){
Perror (s );
Exit (exit_failure );
}
Return mainrtn;
}
Int echo_server (INT argc, char * argv [])
{
Int port;
If (argc = 2 ){
Port = atoi (argv [1]);
} Else {
Port = 5000;
}
Tcpserver myserv (port );
While (true ){
If (myserv. isaccept () = true ){
Myserv. handleecho ();
}
}
Return 0;
}
