Date: Fri, 30 Apr 1999 10:09:20 -0600 From: "Greg Campbell" <greg.campbell@matrikon.com> To: <freebsd-questions@FreeBSD.org> Subject: socket communication Message-ID: <000f01be9323$ce6e5bf0$9308a8c0@matrikon.com>
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Hi,
I would appreciate some words of wisdom from anyone
who has done some socket programming on FreeBSD.
The question is this:
Is there anything special about connecting to a
socket from FreeBSD? I am getting an error from
the "connect" function call (nothing more than
-1 is returned which doesn't seem to map to any
error messages codes.
The following code is what I reverted to. It is
basically the example form the Horspool book:
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#define HOSTNAME "pandora"
#define PORTNUM 2000
#define oops(msg) {printf("%s\n",msg);exit(-1);}
struct sockaddr_in bba;
struct hostent *hp;
FILE *rf;
int s, rfd, ch;
int main()
{
int x;
char return_char;
int retval;
/* build the network address */
bzero(&bba, sizeof(bba));
bba.sin_family = AF_INET;
hp=gethostbyname(HOSTNAME);
if(hp==NULL) oops ("no such computer");
bcopy(hp->h_addr, &bba.sin_addr, hp->h_length);
bba.sin_port = htons(PORTNUM);
/* make the connection */
s = socket(AF_INET, SOCK_STREAM, 0);
if(s==-1) oops("socket");
if((retval=connect(s,&bba, sizeof(bba)))!= 0)
oops("connect");
rf=fdopen(s,"r");
}
The connect call in this snippet always returns
-1 and the program drops out with the "connect"
message.
Let me say that the socket is open on another
FreeBSD box. A HP-UX workstation and a Windows PC
can both connect to the socket. The HP-UX box is
using this same code as the connection client
(although that really doesn't mean much - other
than I have quite a bit of computer crap in my
basement and extra time on my hands).
Is there anything that has to be turned on in the
kernal to support sockets? I am grasping at straws
here.
Any help would be appreciated.
thanks,
Greg
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