I've been following Beej Networking guide and in the server section there is portion of code where it has called a function fork().
if (!fork()) { // this is the child process
close(sockfd); // child doesn't need the listener
if (send(new_fd, "Hello, world!", 13, 0) == -1)
perror("send");
close(new_fd);
exit(0);
I'm on a windows machine and cant get that part working. What can I do to solve this?. My code is as follows.
/* Server */
#define _WIN32_WINNT 0x501
#include <iostream>
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <sys/types.h>
using namespace std;
const int winsockVersion = 2;
#define BACKLOG 10
#define PORT "3000"
int main(void){
WSADATA wsadata;
if (WSAStartup(MAKEWORD(winsockVersion,0),&wsadata) == 0){
cout<<"-WSAStartup initialized..." << endl;
int status;
int sockfd, new_fd;
const char yes = '1';
struct addrinfo hints, *res,*loop_find;
struct sockaddr_storage their_addr;
socklen_t addr_size;
memset(&hints,0,sizeof hints);
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if ( (status = getaddrinfo(NULL,PORT,&hints,&res)) == 0 ){
cout<<"-Call to get addrinfo successful!." << endl;
}
for (loop_find = res; loop_find!=NULL; loop_find = loop_find->ai_next){
if ( (sockfd = socket(loop_find->ai_family,loop_find->ai_socktype,loop_find->ai_protocol) ) == -1 ){
cout<<"-Could not create socket." << endl;
continue;
}else{
cout<<"-Socket Created." << endl;
}
//clearing in use ports.
if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
cout<<"-Couldnt clear blocked port." << endl;
perror("setsockopt");
exit(1);
}
if( bind(sockfd,loop_find->ai_addr,loop_find->ai_addrlen) == -1 ){
closesocket(sockfd);
perror("server: bind");
continue;
}
break;
}
if (listen(sockfd,BACKLOG) != -1){
cout<<"-Listening for incoming connections.";
}
//accept loop.
while(true){
socklen_t addr_size = sizeof their_addr;
new_fd = accept(sockfd,(sockaddr*)&their_addr,&addr_size);
if ( new_fd == -1 ){
perror("accept");
continue;
}
struct sockaddr new_addr;
int len = sizeof new_addr;
getpeername(new_fd,&new_addr,&len);
cout<<"-Connected to " << new_addr.sa_data << endl;
if(!fork()){ //this is a child process
closesocket(sockfd);
if (send(new_fd,"hello world!!",13,0) == -1){
perror("send");
closesocket(new_fd);
exit(0);
}
}
closesocket(new_fd);
}
}
//clear stuff
if( WSACleanup() != 0){
cout<<"-WSACleanup unsuccessful" << endl;
}else{
cout<<"-WSACleanup successful" << endl;
}
return 0;
}
