I am not getting the below header files in c language - c

Question

#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/wait.h>
#include <sys/socket.h> //Unable to find all of this header files
#include <signal.h>
#include <ctype.h>
#include <arpa/inet.h>
#include <netdb.h>
I want to use this header files ion my program and i cannot find it on the internet please provide a source from which i could get them

Answer 1

On windows, socket api is packed into a different set of headers. But the way the windows sockets work (if used in a "portable" way) is pretty much the same as on unix systems. Give or take.
The example code from the other question you linked looks like this on windows:
#include "stdafx.h"
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
//#include <netinet/in.h>
#include <WinSock2.h>
#include <Ws2tcpip.h>
//#include <sys/wait.h>
//#include <sys/socket.h>
//#include <signal.h>
#include <ctype.h>
//#include <arpa/inet.h>
//#include <netdb.h>
#define PORT 20000
#define LENGTH 512
void error(const char *msg)
{
perror(msg);
exit(1);
}
int main(int argc, char *argv[])
{
/* Variable Definition */
SOCKET sockfd;
char revbuf[LENGTH];
struct sockaddr_in remote_addr;
/* Get the Socket file descriptor */
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
fprintf(stderr, "ERROR: Failed to obtain Socket Descriptor! (errno = %d)\n", errno);
exit(1);
}
/* Fill the socket address struct */
remote_addr.sin_family = AF_INET;
remote_addr.sin_port = htons(PORT);
inet_pton(AF_INET, "127.0.0.1", &remote_addr.sin_addr);
ZeroMemory(&(remote_addr.sin_zero), 8);
/* Try to connect the remote */
if (connect(sockfd, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr)) == -1)
{
fprintf(stderr, "ERROR: Failed to connect to the host! (errno = %d)\n", errno);
exit(1);
}
else
printf("[Client] Connected to server at port %d...ok!\n", PORT);
/* Send File to Server */
//if(!fork())
//{
char* fs_name = "/home/aryan/Desktop/quotidiani.txt";
char sdbuf[LENGTH];
printf("[Client] Sending %s to the Server... ", fs_name);
FILE *fs = NULL;
errno_t err = fopen_s(&fs, fs_name, "r");
if (fs == NULL)
{
printf("ERROR: File %s not found.\n", fs_name);
exit(1);
}
ZeroMemory(sdbuf, LENGTH);
int fs_block_sz;
while ((fs_block_sz = fread(sdbuf, sizeof(char), LENGTH, fs)) > 0)
{
if (send(sockfd, sdbuf, fs_block_sz, 0) < 0)
{
fprintf(stderr, "ERROR: Failed to send file %s. (errno = %d)\n", fs_name, errno);
break;
}
ZeroMemory(sdbuf, LENGTH);
}
printf("Ok File %s from Client was Sent!\n", fs_name);
//}
/* Receive File from Server */
printf("[Client] Receiveing file from Server and saving it as final.txt...");
char* fr_name = "/home/aryan/Desktop/progetto/final.txt";
FILE *fr = NULL;
err = fopen_s(&fr, fr_name, "a");
if (fr == NULL)
printf("File %s Cannot be opened.\n", fr_name);
else
{
ZeroMemory(revbuf, LENGTH);
int fr_block_sz = 0;
while ((fr_block_sz = recv(sockfd, revbuf, LENGTH, 0)) > 0)
{
int write_sz = fwrite(revbuf, sizeof(char), fr_block_sz, fr);
if (write_sz < fr_block_sz)
{
error("File write failed.\n");
}
ZeroMemory(revbuf, LENGTH);
if (fr_block_sz == 0 || fr_block_sz != 512)
{
break;
}
}
if (fr_block_sz < 0)
{
if (errno == EAGAIN)
{
printf("recv() timed out.\n");
}
else
{
fprintf(stderr, "recv() failed due to errno = %d\n", errno);
}
}
printf("Ok received from server!\n");
fclose(fr);
}
//close(sockfd);
closesocket(sockfd);
printf("[Client] Connection lost.\n");
return (0);
}
Now you can compare and see what is the same and what is a bit different. Hope that helps you to understand.
In case, you wonder next, why you have linker errors: Link against ws2_32.lib. In contrast to unix systems, where sockets are part of "libc", sockets are factored out into a separate dll in windows.