112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
/* $Id: listifaces.c,v 1.6 2014/02/03 14:32:14 nanard Exp $ */
|
|
/* (c) 2006-2014 Thomas BERNARD
|
|
* http://miniupnp.free.fr/ http://miniupnp.tuxfamily.org/
|
|
*/
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/ioctl.h>
|
|
#include <net/if.h>
|
|
#include <arpa/inet.h>
|
|
#include <netinet/in.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "upnputils.h"
|
|
|
|
/* hexdump */
|
|
void printhex(const unsigned char * p, int n)
|
|
{
|
|
int i;
|
|
while(n>0)
|
|
{
|
|
for(i=0; i<16; i++)
|
|
printf("%02x ", p[i]);
|
|
printf("| ");
|
|
for(i=0; i<16; i++)
|
|
{
|
|
putchar((p[i]>=32 && p[i]<127)?p[i]:'.');
|
|
}
|
|
printf("\n");
|
|
p+=16;
|
|
n -= 16;
|
|
}
|
|
}
|
|
|
|
/* List network interfaces */
|
|
void listifaces(void)
|
|
{
|
|
struct ifconf ifc;
|
|
char * buf = NULL;
|
|
int buflen;
|
|
int s, i;
|
|
int j;
|
|
char saddr[256/*INET_ADDRSTRLEN*/];
|
|
#ifdef __linux__
|
|
buflen = sizeof(struct ifreq)*10;
|
|
#else
|
|
buflen = 0;
|
|
#endif
|
|
/*s = socket(PF_INET, SOCK_DGRAM, 0);*/
|
|
s = socket(AF_INET, SOCK_DGRAM, 0);
|
|
do {
|
|
#ifdef __linux__
|
|
buflen += buflen;
|
|
#endif
|
|
if(buflen > 0)
|
|
buf = realloc(buf, buflen);
|
|
ifc.ifc_len = buflen;
|
|
ifc.ifc_buf = (caddr_t)buf;
|
|
if(ioctl(s, SIOCGIFCONF, &ifc) < 0)
|
|
{
|
|
perror("ioctl");
|
|
close(s);
|
|
free(buf);
|
|
return;
|
|
}
|
|
printf("buffer length=%d - buffer used=%d - sizeof(struct ifreq)=%d\n",
|
|
buflen, ifc.ifc_len, (int)sizeof(struct ifreq));
|
|
printf("IFNAMSIZ=%d ", IFNAMSIZ);
|
|
printf("sizeof(struct sockaddr)=%d sizeof(struct sockaddr_in)=%d\n",
|
|
(int)sizeof(struct sockaddr), (int)sizeof(struct sockaddr_in) );
|
|
#ifndef __linux__
|
|
if(buflen == 0)
|
|
buflen = ifc.ifc_len;
|
|
else
|
|
break;
|
|
} while(1);
|
|
#else
|
|
} while(buflen <= ifc.ifc_len);
|
|
#endif
|
|
printhex((const unsigned char *)ifc.ifc_buf, ifc.ifc_len);
|
|
printf("off index fam name address\n");
|
|
for(i = 0, j = 0; i<ifc.ifc_len; j++)
|
|
{
|
|
/*const struct ifreq * ifrp = &(ifc.ifc_req[j]);*/
|
|
const struct ifreq * ifrp = (const struct ifreq *)(buf + i);
|
|
/*inet_ntop(AF_INET, &(((struct sockaddr_in *)&(ifrp->ifr_addr))->sin_addr), saddr, sizeof(saddr));*/
|
|
saddr[0] = '\0';
|
|
/* inet_ntop(ifrp->ifr_addr.sa_family, &(ifrp->ifr_addr.sa_data[2]), saddr, sizeof(saddr)); */
|
|
sockaddr_to_string(&ifrp->ifr_addr, saddr, sizeof(saddr));
|
|
printf("0x%03x %2d %2d %-16s %s\n", i, j, ifrp->ifr_addr.sa_family, ifrp->ifr_name, saddr);
|
|
/*ifrp->ifr_addr.sa_len is only available on BSD */
|
|
#ifdef __linux__
|
|
i += sizeof(struct ifreq);
|
|
#else
|
|
if(ifrp->ifr_addr.sa_len == 0)
|
|
break;
|
|
i += IFNAMSIZ + ifrp->ifr_addr.sa_len;
|
|
#endif
|
|
}
|
|
free(buf);
|
|
close(s);
|
|
}
|
|
|
|
int main(int argc, char * * argv)
|
|
{
|
|
(void)argc;
|
|
(void)argv;
|
|
listifaces();
|
|
return 0;
|
|
}
|
|
|