xref: /freebsd/sbin/ipf/libipf/getifname.c (revision 069ac184)
1 
2 /*
3  * Copyright (C) 2012 by Darren Reed.
4  *
5  * See the IPFILTER.LICENCE file for details on licencing.
6  *
7  * $Id$
8  */
9 
10 #include "ipf.h"
11 
12 #include "kmem.h"
13 
14 /*
15 * Given a pointer to an interface in the kernel, return a pointer to a
16  * string which is the interface name.
17  */
18 char *
19 getifname(struct ifnet *ptr)
20 {
21 #if SOLARIS
22 #  include <sys/mutex.h>
23 #  include <sys/condvar.h>
24 # include "../pfil/qif.h"
25 	char *ifname;
26 	qif_t qif;
27 
28 	if ((void *)ptr == (void *)-1)
29 		return ("!");
30 	if (ptr == NULL)
31 		return ("-");
32 
33 	if (kmemcpy((char *)&qif, (u_long)ptr, sizeof(qif)) == -1)
34 		return ("X");
35 	ifname = strdup(qif.qf_name);
36 	if ((ifname != NULL) && (*ifname == '\0')) {
37 		free(ifname);
38 		return ("!");
39 	}
40 	return (ifname);
41 #else
42 	struct ifnet netif;
43 
44 	if ((void *)ptr == (void *)-1)
45 		return ("!");
46 	if (ptr == NULL)
47 		return ("-");
48 
49 	if (kmemcpy((char *)&netif, (u_long)ptr, sizeof(netif)) == -1)
50 		return ("X");
51 	return (strdup(netif.if_xname));
52 #endif
53 }
54