I have the following visual c++ code. It's taken from Beej's guide to
network programming, and modified a little foruse with winsock. But
gethostbyname just doesn't work, not for localhost nor any other ala
http://google.com
CODE:

#include "stdafx.h"
#include <winsock.h>
#include <iostream>
#define BACKLOG 1
#define MYPORT 18999
#define PORT 18999 // the port client will be connecting to
#define MAXDATASIZE 100 // max number of bytes we can get at once


class WSAInitializer // Winsock Initializer
{
public:
WSAInitializer() {
if (WSAStartup(0x101,&m_wsadata))
{
exit(-1);
}
}
~WSAInitializer() {
WSACleanup();
}
private:
WSADATA m_wsadata;
};



int _tmain(int argc, _TCHAR* argv[])
{
WSAInitializer* WSAINIT=new WSAInitializer;
SOCKET sockfd, numbytes;
char buf[MAXDATASIZE];
struct hostent *he;
struct sockaddr_in their_addr; // connector's address information

if (argc != 2) {
fprintf(stderr,"usage: client hostname\n");
exit(1);
}

if ((he=gethostbyname((char*)argv[1])) == NULL) { // get the host
info
std::cout<<WSAGetLastError();
perror("gethostbyname");
exit(1);
}

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

their_addr.sin_family = AF_INET; // host byte order
their_addr.sin_port = htons(PORT); // short, network byte order
their_addr.sin_addr = *((struct in_addr *)he->h_addr);
memset(their_addr.sin_zero, '\0', sizeof their_addr.sin_zero);

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

if ((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) == -1) {
perror("recv");
exit(1);
}

buf[numbytes] = '\0';

printf("Received: %s",buf);

closesocket(sockfd);

return 0;

}

Do you see any problems with the above code? I'm nearly 100% sure the
error isn't caused by my local machine.

When running it like client.exe localhost it gives the Winsock error
code 11001 aka host not found.

Any suggestions?

jonashn wrote:
> I have the following visual c++ code. It's taken from Beej's guide to
> network programming, and modified a little foruse with winsock. But
> gethostbyname just doesn't work, not for localhost nor any other ala
> http://google.com
> CODE:
>
> #include "stdafx.h"
> #include <winsock.h>
> #include <iostream>
> [..]
>
> Do you see any problems with the above code?

You mean, beyond the fact that it's non-standard C++?

> I'm nearly 100% sure the
> error isn't caused by my local machine.

Then it's caused by something else.

> When running it like client.exe localhost it gives the Winsock error
> code 11001 aka host not found.
>
> Any suggestions?

Post to the newsgroup where Winsock is on topic, like the Windows
programming newsgroup, there are several. The FAQ contains the list
of the proposed ones.

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

On 7 Dec., 15:37, "Victor Bazarov" <v.Abaza...@comAcast.net> wrote:
> jonashn wrote:
> > I have the following visual c++ code. It's taken from Beej's guide to
> > network programming, and modified a little foruse with winsock. But
> > gethostbyname just doesn't work, not for localhost nor any other ala
> >http://google.com
> > CODE:
>
> > #include "stdafx.h"
> > #include <winsock.h>
> > #include <iostream>
> > [..]
>
> > Do you see any problems with the above code?
>
> You mean, beyond the fact that it's non-standard C++?

Yes, and actually a started using standard C++ and WxWidgets, and
would at any time prefer gcc and standard C. I just coudn't get WxW to
work, and since this is part of a school project which has to be
finished fast, i had to switch and ended up by choosing VCE.

> > I'm nearly 100% sure the
> > error isn't caused by my local machine.
>
> Then it's caused by something else.
>
> > When running it like client.exe localhost it gives the Winsock error
> > code 11001 aka host not found.
>
> > Any suggestions?
>
> Post to the newsgroup where Winsock is on topic, like the Windows
> programming newsgroup, there are several. The FAQ contains the list
> of the proposed ones.
I'll do so.
>
> V
> --