Anonymous

//-----------------------Includes
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <iostream>
//-----------------------


//-----------------------MISC
#pragma comment(lib, "wsock32")
using namespace std;
//-----------------------

#define MYPORT 8200 // the port users will be connecting to
#define BACKLOG 10 // how many pending connections queue will hold
#define MAXBUFLEN 100

void sigchld_handler(int s)
{
while(waitpid(-1, NULL, WNOHANG) > 0);
}

int main()
{
	int sockfd, new_fd; // listen on sock_fd, new connection on new_fd
	struct sockaddr_in my_addr; // my address information
	struct sockaddr_in their_addr; // connector's address information
	socklen_t sin_size;
	struct sigaction sa;
	int yes=1;

	if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1)
	{
	perror("socket");
	exit(1);
	}

	if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1)
	{
	perror("setsockopt");
	exit(1);
	}

	my_addr.sin_family = AF_INET; // host byte order
	my_addr.sin_port = htons(MYPORT); // short, network byte order
	my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
	memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);

	if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))== -1)
	{
	perror("bind");
	exit(1);
	}

	if (listen(sockfd, BACKLOG) == -1)
	{
	perror("listen");
	exit(1);
	}

	sa.sa_handler = sigchld_handler; // reap all dead processes
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;

	if (sigaction(SIGCHLD, &sa, NULL) == -1)
	{
	perror("sigaction");
	exit(1);
	}

	while(1)
	{ // main accept() loop
	sin_size = sizeof(struct sockaddr_in);
	if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1)
	{
	perror("accept");
	continue;
	}

	printf("server: got connection from %s\n",
	inet_ntoa(their_addr.sin_addr));

	if (!fork()) { // this is the child process
		close(sockfd); // child doesn't need the listener
	if (send(new_fd, "Hello, world!\n", 14, 0) == -1)
		perror("send");

	shutdown(new_fd, 2);
	exit(0);
	}
shutdown(new_fd, 2); // parent doesn't need this
}
return 0;
}