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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inet(4f) inet(4f)
Name
inet - Internet protocol family
Syntax
#include <sys/types.h>
#include <netinet/in.h>
Description
The Internet protocol family is a collection of protocols that is layered on the Internet Protocol (IP) transport layer and that uses the
Internet address format. The Internet family provides protocol support for the SOCK_STREAM, SOCK_DGRAM, and SOCK_RAW socket types. The
SOCK_RAW interface provides access to the IP protocol.
Addressing
Internet addresses are 4-byte quantities, stored in network standard format. The include file defines this address as a discriminated
union.
Sockets bound to the Internet protocol family use the following addressing structure:
struct sockaddr_in {
short sin_family;
u_short sin_port;
struct in_addr sin_addr;
char sin_zero[8];
};
Sockets may be created with the address INADDR_ANY to effect ``wildcard'' matching on incoming messages.
Protocols
The Internet protocol family comprises the IP transport protocol, Internet Control Message Protocol (ICMP), Transmission Control Protocol
(TCP), and User Datagram Protocol (UDP). TCP is used to support the SOCK_STREAM abstraction, while UDP is used to support the SOCK_DGRAM
abstraction. A raw interface to IP and ICMP is available by creating an Internet socket of type SOCK_RAW.
See Also
tcp(4p), udp(4p), ip(4p)
inet(4f)