From mboxrd@z Thu Jan  1 00:00:00 1970
From: "John T. Williams" <jowillia@vt.edu>
Subject: Re: connecting to a hoast
Date: Mon, 13 Sep 2004 03:35:40 -0500
Sender: linux-c-programming-owner@vger.kernel.org
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To: jtwilliams@vt.edu
Cc: John T Williams <jtwilliams@contextweb.com>, linux-c-programming <linux-c-programming@vger.kernel.org>

small correction to the code + this actually fetches a webpage=20
------------------------

#include <sys/types.h>
#include <netdb.h>


int main() {

        char* host =3D "www.vt.edu";
        int port =3D 80;
        struct sockaddr_in passive;
        struct protoent* proto;
        struct hostent  hostent;
        char buff[512];
        int skt;
        int sz;

        proto =3D getprotobyname("tcp");
        skt =3D socket(PF_INET, SOCK_STREAM, proto->p_proto );
        hostent =3D *gethostbyname(host);
        passive.sin_family =3D AF_INET;
        memcpy(&passive.sin_addr, hostent.h_addr, hostent.h_length);
        passive.sin_port =3D htons(port);
        connect(skt, (struct sockaddr*) &passive, sizeof(passive));
        sz =3D sprintf(buff, "GET / HTTP/1.1\r\nHOST:www.vt.edu\r\n\r\n=
");
        write(skt, buff, sz);
        while( (sz =3D read(skt,buff, 512) ) > 0  ) {
       =20
                printf(buff);
       =20
        }
        printf("\n");
        close(skt);
        return 0;
}

On Mon, 2004-09-13 at 02:16, John T. Williams wrote:
> Ok
>=20
> -------- Start Code ---------------------------------
> #include <sys/socket.h>         // for connection api
> #include <sys/types.h>          // for predefined values
> #include <netdb.h>              // for hostname resolution api
>=20
> char* host =3D "ftp.domain.com=A1;
> int port =3D 25;
> struct sockaddr_in passive; =20
> struct protoent * proto;
> int skt;
>=20
> proto =3D getprotobyname("tcp")  =20
> // gets the prototype number for tcp/ip=20
>=20
> skt =3D socket(PF_INET, SOCK_STREAM, proto->p_proto );   =20
> //creates a socket=20
>=20
> passive.sin_family      =3D AF_INET;             =20
> // IPv4 connection type
> passive.sin_addr        =3D gethostbye(host);    =20
> // resolves the hostname and returns the correct in_addr
> passive.sin_port        =3D htons(port);         =20
> // htons changes the bit order so that it is in network format
>=20
> connect(skt, &passive, sizeof(passive));       =20
> // connect to host  =20
>=20
> close(skt);
> // close connection
> -------- End Code -----------------------------------
> this code does not check for errors and will probably crash if anythi=
ng
> goes wrong.  How ever it does show how to connect to a server.
>=20
> You should read:
> http://www.gnu.org/software/libc/manual/html_node/Connections.html#Co=
nnections
>=20
> - John
>=20
>=20
> On Sun, 2004-09-12 at 16:04, Ameer Armaly wrote:
> > Hi all.
> > I was wondering, where is a step by step instructions to connect to=
 a=20
> > hoast?
> > The documentation seems very cryptic, and doesn't give directions.
> >=20
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-c-p=
rogramming" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>=20
> -
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