/*
* Copyright (C) 1993-2002 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* Added redirect stuff and a variety of bug fixes. (mcn@EnGarde.com)
*/
#ifdef __sgi
# include <sys/ptimers.h>
#endif
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#if !defined(__SVR4) && !defined(__svr4__)
#include <strings.h>
#else
#include <sys/byteorder.h>
#endif
#include <sys/time.h>
#include <sys/param.h>
#include <stdlib.h>
#include <unistd.h>
#include <stddef.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#if defined(sun) && (defined(__svr4__) || defined(__SVR4))
# include <sys/ioccom.h>
# include <sys/sysmacros.h>
#endif
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <net/if.h>
#if __FreeBSD_version >= 300000
# include <net/if_var.h>
#endif
#include <netdb.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <resolv.h>
#include <ctype.h>
#include <nlist.h>
#include "netinet/ip_compat.h"
#include "netinet/ip_fil.h"
#include "netinet/ip_nat.h"
#include "netinet/ip_state.h"
#include "netinet/ip_proxy.h"
#include "ipf.h"
#include "kmem.h"
#if defined(sun) && !SOLARIS2
# define STRERROR(x) sys_errlist[x]
extern char *sys_errlist[];
#else
# define STRERROR(x) strerror(x)
#endif
#if !defined(lint)
static const char sccsid[] ="@(#)ipnat.c 1.9 6/5/96 (C) 1993 Darren Reed";
static const char rcsid[] = "@(#)$Id: ipnat.c,v 2.16.2.21 2002/06/06 10:49:19 darrenr Exp $";
#endif
#if SOLARIS
#define bzero(a,b) memset(a,0,b)
#endif
int use_inet6 = 0;
char thishost[MAXHOSTNAMELEN];
extern char *optarg;
extern ipnat_t *natparse __P((char *, int));
extern void natparsefile __P((int, char *, int));
extern void printnat __P((ipnat_t *, int));
extern void printactivenat __P((nat_t *, int));
extern void printhostmap __P((hostmap_t *, u_int));
extern char *getsumd __P((u_32_t));
void dostats __P((natstat_t *, int)), flushtable __P((int, int));
void usage __P((char *));
int countbits __P((u_32_t));
char *getnattype __P((ipnat_t *));
int main __P((int, char*[]));
void printaps __P((ap_session_t *, int));
void showhostmap __P((natstat_t *nsp));
void natstat_dead __P((natstat_t *, char *));
void usage(name)
char *name;
{
fprintf(stderr, "%s: [-CFhlnrsv] [-f filename]\n", name);
exit(1);
}
int main(argc, argv)
int argc;
char *argv[];
{
natstat_t ns, *nsp = &ns;
char *file, *core, *kernel;
int fd, opts, c, mode;
fd = -1;
opts = 0;
file = NULL;
core = NULL;
kernel = NULL;
mode = O_RDWR;
while ((c = getopt(argc, argv, "CdFf:hlM:N:nrsv")) != -1)
switch (c)
{
case 'C' :
opts |= OPT_CLEAR;
break;
case 'd' :
opts |= OPT_DEBUG;
break;
case 'f' :
file = optarg;
break;
case 'F' :
opts |= OPT_FLUSH;
break;
case 'h' :
opts |=OPT_HITS;
break;
case 'l' :
opts |= OPT_LIST;
mode = O_RDONLY;
break;
case 'M' :
core = optarg;
break;
case 'N' :
kernel = optarg;
break;
case 'n' :
opts |= OPT_NODO;
mode = O_RDONLY;
break;
case 'r' :
opts |= OPT_REMOVE;
break;
case 's' :
opts |= OPT_STAT;
mode = O_RDONLY;
break;
case 'v' :
opts |= OPT_VERBOSE;
break;
default :
usage(argv[0]);
}
if ((kernel != NULL) || (core != NULL)) {
(void) setgid(getgid());
(void) setuid(getuid());
}
bzero((char *)&ns, sizeof(ns));
gethostname(thishost, sizeof(thishost));
thishost[sizeof(thishost) - 1] = '\0';
if (!(opts & OPT_NODO) && (kernel == NULL) && (core == NULL)) {
if (openkmem(kernel, core) == -1)
exit(1);
if (((fd = open(IPL_NAT, mode)) == -1) &&
((fd = open(IPL_NAT, O_RDONLY)) == -1)) {
(void) fprintf(stderr, "%s: open: %s\n", IPL_NAT,
STRERROR(errno));
if (errno == ENODEV)
fprintf(stderr, "IPFilter enabled?\n");
exit(1);
}
if (ioctl(fd, SIOCGNATS, &nsp) == -1) {
perror("ioctl(SIOCGNATS)");
exit(1);
}
(void) setgid(getgid());
(void) setuid(getuid());
} else if ((kernel != NULL) || (core != NULL)) {
if (openkmem(kernel, core) == -1)
exit(1);
natstat_dead(nsp, kernel);
if (opts & (OPT_LIST|OPT_STAT))
dostats(nsp, opts);
exit(0);
}
if (opts & (OPT_FLUSH|OPT_CLEAR))
flushtable(fd, opts);
if (file)
natparsefile(fd, file, opts);
if (opts & (OPT_LIST|OPT_STAT))
dostats(nsp, opts);
return 0;
}
/*
* Read nat statistic information in using a symbol table and memory file
* rather than doing ioctl's.
*/
void natstat_dead(nsp, kernel)
natstat_t *nsp;
char *kernel;
{
struct nlist nat_nlist[10] = {
{ "nat_table" }, /* 0 */
{ "nat_list" },
{ "maptable" },
{ "ipf_nattable_sz" },
{ "ipf_natrules_sz" },
{ "ipf_rdrrules_sz" }, /* 5 */
{ "ipf_hostmap_sz" },
{ "nat_instances" },
{ "ap_sess_list" },
{ NULL }
};
void *tables[2];
if (nlist(kernel, nat_nlist) == -1) {
fprintf(stderr, "nlist error\n");
return;
}
/*
* Normally the ioctl copies all of these values into the structure
* for us, before returning it to useland, so here we must copy each
* one in individually.
*/
kmemcpy((char *)&tables, nat_nlist[0].n_value, sizeof(tables));
nsp->ns_table[0] = tables[0];
nsp->ns_table[1] = tables[1];
kmemcpy((char *)&nsp->ns_list, nat_nlist[1].n_value,
sizeof(nsp->ns_list));
kmemcpy((char *)&nsp->ns_maptable, nat_nlist[2].n_value,
sizeof(nsp->ns_maptable));
kmemcpy((char *)&nsp->ns_nattab_sz, nat_nlist[3].n_value,
sizeof(nsp->ns_nattab_sz));
kmemcpy((char *)&nsp->ns_rultab_sz, nat_nlist[4].n_value,
sizeof(nsp->ns_rultab_sz));
kmemcpy((char *)&nsp->ns_rdrtab_sz, nat_nlist[5].n_value,
sizeof(nsp->ns_rdrtab_sz));
kmemcpy((char *)&nsp->ns_hostmap_sz, nat_nlist[6].n_value,
sizeof(nsp->ns_hostmap_sz));
kmemcpy((char *)&nsp->ns_instances, nat_nlist[7].n_value,
sizeof(nsp->ns_instances));
kmemcpy((char *)&nsp->ns_apslist, nat_nlist[8].n_value,
sizeof(nsp->ns_apslist));
}
/*
* Display NAT statistics.
*/
void dostats(nsp, opts)
natstat_t *nsp;
int opts;
{
nat_t **nt[2], *np, nat;
ipnat_t ipn;
/*
* Show statistics ?
*/
if (opts & OPT_STAT) {
printf("mapped\tin\t%lu\tout\t%lu\n",
nsp->ns_mapped[0], nsp->ns_mapped[1]);
printf("added\t%lu\texpired\t%lu\n",
nsp->ns_added, nsp->ns_expire);
printf("no memory\t%lu\tbad nat\t%lu\n",
nsp->ns_memfail, nsp->ns_badnat);
printf("inuse\t%lu\nrules\t%lu\n",
nsp->ns_inuse, nsp->ns_rules);
printf("wilds\t%u\n", nsp->ns_wilds);
if (opts & OPT_VERBOSE)
printf("table %p list %p\n",
nsp->ns_table, nsp->ns_list);
}
/*
* Show list of NAT rules and NAT sessions ?
*/
if (opts & OPT_LIST) {
printf("List of active MAP/Redirect filters:\n");
while (nsp->ns_list) {
if (kmemcpy((char *)&ipn, (long)nsp->ns_list,
sizeof(ipn))) {
perror("kmemcpy");
break;
}
if (opts & OPT_HITS)
printf("%d ", ipn.in_hits);
printnat(&ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
nsp->ns_list = ipn.in_next;
}
nt[0] = (nat_t **)malloc(sizeof(*nt) * NAT_SIZE);
if (kmemcpy((char *)nt[0], (long)nsp->ns_table[0],
sizeof(**nt) * NAT_SIZE)) {
perror("kmemcpy");
return;
}
printf("\nList of active sessions:\n");
for (np = nsp->ns_instances; np; np = nat.nat_next) {
if (kmemcpy((char *)&nat, (long)np, sizeof(nat)))
break;
printactivenat(&nat, opts);
}
if (opts & OPT_VERBOSE)
showhostmap(nsp);
free(nt[0]);
}
}
/*
* display the active host mapping table.
*/
void showhostmap(nsp)
natstat_t *nsp;
{
hostmap_t hm, *hmp, **maptable;
u_int hv;
printf("\nList of active host mappings:\n");
maptable = (hostmap_t **)malloc(sizeof(hostmap_t *) *
nsp->ns_hostmap_sz);
if (kmemcpy((char *)maptable, (u_long)nsp->ns_maptable,
sizeof(hostmap_t *) * nsp->ns_hostmap_sz)) {
perror("kmemcpy (maptable)");
return;
}
for (hv = 0; hv < nsp->ns_hostmap_sz; hv++) {
hmp = maptable[hv];
while (hmp) {
if (kmemcpy((char *)&hm, (u_long)hmp, sizeof(hm))) {
perror("kmemcpy (hostmap)");
return;
}
printhostmap(&hm, hv);
hmp = hm.hm_next;
}
}
free(maptable);
}
/*
* Issue an ioctl to flush either the NAT rules table or the active mapping
* table or both.
*/
void flushtable(fd, opts)
int fd, opts;
{
int n = 0;
if (opts & OPT_FLUSH) {
n = 0;
if (!(opts & OPT_NODO) && ioctl(fd, SIOCIPFFL, &n) == -1)
perror("ioctl(SIOCFLNAT)");
else
printf("%d entries flushed from NAT table\n", n);
}
if (opts & OPT_CLEAR) {
n = 1;
if (!(opts & OPT_NODO) && ioctl(fd, SIOCIPFFL, &n) == -1)
perror("ioctl(SIOCCNATL)");
else
printf("%d entries flushed from NAT list\n", n);
}
}
