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Full Discussion: Address family not supported by protocol family
Operating Systems OS X (Apple) Address family not supported by protocol family Post 302189431 by DNAx86 on Friday 25th of April 2008 06:03:04 PM
Old 04-25-2008
Address family not supported by protocol family
Hi,

I compiled with no error a C program, than I tryed to execute it and than I get this error:

connessione al server fallita: Address family not supported by protocol family


What does it mean?

Why I get this error only on Mac os x while on Ubuntu the program works?

The code is:
/*
* EsameClient.c
*
*/

#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define NR 3
#define MAXLENGTH 80
#define SERVER_PORT 1313

int main (unsigned argc, char **argv)
{
int sockfd;
struct sockaddr_in server={AF_INET,htons(SERVER_PORT),INADDR_ANY};
int i=0,len;
char buf[MAXLENGTH],c;
int buffer[NR], stato;

/* Controllo Parametri Passati da Terminale */
if(argc != 4) // argv[1] -> argv[3] sono le risorse
{
perror("Chiamata corretta del programma:\nnome-programma <risorsa1> <risorsa2> <risorsa3> \n<risorsai> deve essere un intero positivo");
exit(1);
}

/* impostazione del transport end point */
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("chiamata alla system call socket fallita");
exit(1);
}
/* connessione al server */
if(connect(sockfd,(struct sockaddr *)&server,sizeof server)==-1)
{
perror("connessione al server fallita");
exit(2);
}


/* ricezione e stampa a video del messaggio di benvenuto del server */
if(recv(sockfd,buf,27,0)>0)
{
buf[27]='\0';
printf("%s",buf);
}
else
{
perror("Connessione al server interrotta");
exit(3);
}

/* acquisizione della stringa da standard input */
/* while((c=getchar())!='\n' && i<MAXLENGTH)
buf[i++]=c;
buf[i]='\0';
len=strlen(buf); */

// Imposta buffer e len
for(i=0; i<NR;i++)
buffer[i]=argv[i+1];
len=sizeof(buffer); // size?? o # = 3/////////////////////////////////////////////////////


/* invio e ricezione della stringa */
if(send(sockfd,buffer,len,0)==-1) // Se send ritorna -1 = errore
{
perror("Errore nell'invio della richiesta risorse al server");
exit(4);
}
if(recv(sockfd,&stato,len,0)>0)
{
printf("%d\n",stato);
}
else
{
perror("Connessione al server interrotta");
exit(3);
}

/* chiusura della connessione */
close(sockfd);
}
 

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LEARN ABOUT CENTOS

sockatmark

SOCKATMARK(3)						     Linux Programmer's Manual						     SOCKATMARK(3)

NAME

       sockatmark - determine whether socket is at out-of-band mark

SYNOPSIS

       #include <sys/socket.h>

       int sockatmark(int sockfd);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       sockatmark(): _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600

DESCRIPTION

       sockatmark() returns a value indicating whether or not the socket referred to by the file descriptor sockfd is at the out-of-band mark.	If
       the socket is at the mark, then 1 is returned; if the socket is not at the mark, 0 is returned.	This function does not remove the  out-of-
       band mark.

RETURN VALUE

       A  successful  call  to	sockatmark()  returns 1 if the socket is at the out-of-band mark, or 0 if it is not.  On error, -1 is returned and
       errno is set to indicate the error.

ERRORS

       EBADF  sockfd is not a valid file descriptor.

       EINVAL sockfd is not a file descriptor to which sockatmark() can be applied.

VERSIONS

       sockatmark() was added to glibc in version 2.2.4.

CONFORMING TO

       POSIX.1-2001.

NOTES

       If sockatmark() returns 1, then the out-of-band data can be read using the MSG_OOB flag of recv(2).

       Out-of-band data is supported only on some stream socket protocols.

       sockatmark() can safely be called from a handler for the SIGURG signal.

       sockatmark() is implemented using the SIOCATMARK ioctl(2) operation.

BUGS

       Prior to glibc 2.4, sockatmark() did not work.

EXAMPLE

       The following code can be used after receipt of a SIGURG signal to read (and discard) all data up to the mark, and then read  the  byte	of
       data at the mark:

	   char buf[BUF_LEN];
	   char oobdata;
	   int atmark, s;

	   for (;;) {
	       atmark = sockatmark(sockfd);
	       if (atmark == -1) {
		   perror("sockatmark");
		   break;
	       }

	       if (atmark)
		   break;

	       s = read(sockfd, buf, BUF_LEN) <= 0);
	       if (s == -1)
		   perror("read");
	       if (s <= 0)
		   break;
	   }

	   if (atmark == 1) {
	       if (recv(sockfd, &oobdata, 1, MSG_OOB) == -1) {
		   perror("recv");
		   ...
	       }
	   }

SEE ALSO

       fcntl(2), recv(2), send(2), tcp(7)

COLOPHON

       This  page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-12-03							     SOCKATMARK(3)
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