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/*
* Copyright (c) 1990,1993 Regents of The University of Michigan.
* Copyright (c) 1999-2000 Adrian Sun.
* All Rights Reserved. See COPYRIGHT.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#ifdef TRU64
#include <sys/mbuf.h>
#include <net/route.h>
#endif /* TRU64 */
#include <net/if.h>
#include <errno.h>
#ifdef __svr4__
#include <sys/sockio.h>
#endif
#include <atalk/util.h>
/* allocation size for interface list. */
#define IFACE_NUM 5
/* we leave all of the ioctl's to the application */
static int addname(char **list, int *i, const char *name)
{
/* if we've run out of room, allocate some more. just return
* the present list if we can't. */
if ((list[*i] = strdup(name)) == NULL)
return -1;
(*i)++;
list[*i] = NULL; /* zero out the next entry */
return 0;
}
static int getifaces(const int sockfd, char ***list)
{
#ifdef HAVE_IFNAMEINDEX
struct if_nameindex *ifstart, *ifs;
int i = 0;
char **new;
ifs = ifstart = if_nameindex();
new = (char **) malloc((sizeof(ifs)/sizeof(struct if_nameindex) + 1) * sizeof(char *));
while (ifs && ifs->if_name) {
/* just bail if there's a problem */
if (addname(new, &i, ifs->if_name) < 0)
break;
ifs++;
}
if_freenameindex(ifstart);
*list = new;
return i;
#else
struct ifconf ifc;
struct ifreq ifrs[ 64 ], *ifr, *nextifr;
int ifrsize, i = 0;
char **new;
if (!list)
return 0;
memset( &ifc, 0, sizeof( struct ifconf ));
ifc.ifc_len = sizeof( ifrs );
memset( ifrs, 0, sizeof( ifrs ));
ifc.ifc_buf = (caddr_t)ifrs;
if ( ioctl( sockfd, SIOCGIFCONF, &ifc ) < 0 ) {
return 0;
}
new = (char **) malloc((ifc.ifc_len/sizeof(struct ifreq) + 1) * sizeof(char *));
for ( ifr = ifc.ifc_req; ifc.ifc_len >= (int) sizeof( struct ifreq );
ifc.ifc_len -= ifrsize, ifr = nextifr ) {
#ifdef BSD4_4
ifrsize = sizeof(ifr->ifr_name) +
(ifr->ifr_addr.sa_len > sizeof(struct sockaddr)
? ifr->ifr_addr.sa_len : sizeof(struct sockaddr));
#else /* !BSD4_4 */
ifrsize = sizeof( struct ifreq );
#endif /* BSD4_4 */
nextifr = (struct ifreq *)((caddr_t)ifr + ifrsize );
/* just bail if there's a problem */
if (addname(new, &i, ifr->ifr_name) < 0)
break;
}
*list = new;
return i;
#endif
}
/*
* Get interfaces from the kernel. we keep an extra null entry to signify
* the end of the interface list.
*/
char **getifacelist(void)
{
char **list = NULL; /* FIXME */
int i, fd;
if ((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
return NULL;
if ((i = getifaces(fd, &list)) == 0) {
free(list);
close(fd);
return NULL;
}
close(fd);
return list;
}
/* go through and free the interface list */
void freeifacelist(char **ifacelist)
{
char *value, **list = ifacelist;
if (!ifacelist)
return;
while ((value = *list++)) {
free(value);
}
free(ifacelist);
}
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