#include "ipf.h"
#include "qif.h"

#include "kmem.h"

/*
 * Given a pointer to an interface in the kernel, return a pointer to a
 * string which is the interface name.
 */
char *getifname(ptr)
struct ifnet *ptr;
{
#if SOLARIS
	char *ifname;
	s_ill_t ill;

	if ((void *)ptr == (void *)-1)
		return "!";
	if (ptr == NULL)
		return "-";

	if (kmemcpy((char *)&ill, (u_long)ptr, sizeof(ill)) == -1)
		return "X";
	ifname = malloc(sizeof(ill.ill_name) + 1);
	strncpy(ifname, ill.ill_name, sizeof(ill.ill_name));
	ifname[sizeof(ill.ill_name)] = '\0';
	return ifname;
#else
# if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
    defined(__OpenBSD__)
#else
	char buf[32];
	int len;
# endif
	struct ifnet netif;

	if ((void *)ptr == (void *)-1)
		return "!";
	if (ptr == NULL)
		return "-";

	if (kmemcpy((char *)&netif, (u_long)ptr, sizeof(netif)) == -1)
		return "X";
# if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
    defined(__OpenBSD__)
	return strdup(netif.if_xname);
# else
	if (kstrncpy(buf, (u_long)netif.if_name, sizeof(buf)) == -1)
		return "X";
	if (netif.if_unit < 10)
		len = 2;
	else if (netif.if_unit < 1000)
		len = 3;
	else if (netif.if_unit < 10000)
		len = 4;
	else
		len = 5;
	buf[sizeof(buf) - len] = '\0';
	sprintf(buf + strlen(buf), "%d", netif.if_unit % 10000);
	return strdup(buf);
# endif
#endif
}