/* * Copyright (C) 1993-2001 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. * * Added redirect stuff and a variety of bug fixes. (mcn@EnGarde.com) * * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #if !defined(__SVR4) && !defined(__svr4__) #include #else #include #endif #include #include #include #include #include #include #define _KERNEL #include #undef _KERNEL #include #include #if defined(sun) && (defined(__svr4__) || defined(__SVR4)) # include # include #endif #include #include #include #include #include #if __FreeBSD_version >= 300000 # include #endif #include #include #include #include #include #if defined(linux) # include #else # include #endif #include "ipf.h" #include "netinet/ipl.h" #include "kmem.h" #ifdef __hpux # define nlist nlist64 #endif #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 1.24.2.2 2005/05/10 21:19:30 darrenr Exp $"; #endif #if SOLARIS #define bzero(a,b) memset(a,0,b) #endif int use_inet6 = 0; char thishost[MAXHOSTNAMELEN]; extern char *optarg; void dostats __P((int, natstat_t *, int, int)); void flushtable __P((int, int)); void usage __P((char *)); int main __P((int, char*[])); void showhostmap __P((natstat_t *nsp)); void natstat_dead __P((natstat_t *, char *)); void dostats_live __P((int, natstat_t *, int)); void showhostmap_live __P((int, natstat_t *)); int opts; void usage(name) char *name; { fprintf(stderr, "Usage: %s [-CdFhlnrRsv] [-f filename]\n", name); exit(1); } int main(argc, argv) int argc; char *argv[]; { char *file, *core, *kernel; natstat_t ns, *nsp; int fd, c, mode; ipfobj_t obj; fd = -1; opts = 0; nsp = &ns; file = NULL; core = NULL; kernel = NULL; mode = O_RDWR; while ((c = getopt(argc, argv, "CdFf:hlM:N:nrRsv")) != -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_DONOTHING; mode = O_RDONLY; break; case 'R' : opts |= OPT_NORESOLVE; 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]); } initparse(); if ((kernel != NULL) || (core != NULL)) { (void) setgid(getgid()); (void) setreuid(getuid(), getuid()); } bzero((char *)&ns, sizeof(ns)); if ((opts & OPT_DONOTHING) == 0) { if (checkrev(IPL_NAME) == -1) { fprintf(stderr, "User/kernel version check failed\n"); exit(1); } } if (!(opts & OPT_DONOTHING) && (kernel == NULL) && (core == NULL)) { #ifdef notdef if (openkmem(kernel, core) == -1) exit(1); #endif if (((fd = open(IPNAT_NAME, mode)) == -1) && ((fd = open(IPNAT_NAME, O_RDONLY)) == -1)) { (void) fprintf(stderr, "%s: open: %s\n", IPNAT_NAME, STRERROR(errno)); exit(1); } bzero((char *)&obj, sizeof(obj)); obj.ipfo_rev = IPFILTER_VERSION; obj.ipfo_size = sizeof(*nsp); obj.ipfo_type = IPFOBJ_NATSTAT; obj.ipfo_ptr = (void *)nsp; if (ioctl(fd, SIOCGNATS, &obj) == -1) { perror("ioctl(SIOCGNATS)"); exit(1); } (void) setgid(getgid()); (void) setreuid(getuid(), 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(fd, nsp, opts, 0); exit(0); } if (opts & (OPT_FLUSH|OPT_CLEAR)) flushtable(fd, opts); if (file) { ipnat_parsefile(fd, ipnat_addrule, ioctl, file); } if (opts & (OPT_LIST|OPT_STAT)) dostats(fd, nsp, opts, 1); 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 userland, 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(fd, nsp, opts, alive) natstat_t *nsp; int fd, opts, alive; { nat_t *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\norphans\t%u\nrules\t%lu\n", nsp->ns_inuse, nsp->ns_orphans, 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) { if (alive) { dostats_live(fd, nsp, opts); return; } 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("%lu ", ipn.in_hits); printnat(&ipn, opts & (OPT_DEBUG|OPT_VERBOSE)); nsp->ns_list = ipn.in_next; } 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, 0); if (nat.nat_aps) printaps(nat.nat_aps, opts); } if (opts & OPT_VERBOSE) showhostmap(nsp); } } /* * 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 (maptable == NULL) { perror("malloc"); exit(1); } 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_DONOTHING) && 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_DONOTHING) && ioctl(fd, SIOCIPFFL, &n) == -1) perror("ioctl(SIOCCNATL)"); else printf("%d entries flushed from NAT list\n", n); } } /* * Display NAT statistics. */ void dostats_live(fd, nsp, opts) natstat_t *nsp; int fd, opts; { ipfgeniter_t iter; ipfobj_t obj; ipnat_t ipn; nat_t nat; bzero((char *)&obj, sizeof(obj)); obj.ipfo_rev = IPFILTER_VERSION; obj.ipfo_type = IPFOBJ_GENITER; obj.ipfo_size = sizeof(iter); obj.ipfo_ptr = &iter; iter.igi_type = IPFGENITER_IPNAT; iter.igi_nitems = 1; iter.igi_data = &ipn; /* * Show list of NAT rules and NAT sessions ? */ printf("List of active MAP/Redirect filters:\n"); while (nsp->ns_list) { if (ioctl(fd, SIOCGENITER, &obj) == -1) break; if (opts & OPT_HITS) printf("%lu ", ipn.in_hits); printnat(&ipn, opts & (OPT_DEBUG|OPT_VERBOSE)); nsp->ns_list = ipn.in_next; } printf("\nList of active sessions:\n"); iter.igi_type = IPFGENITER_NAT; iter.igi_nitems = 1; iter.igi_data = &nat; while (nsp->ns_instances != NULL) { if (ioctl(fd, SIOCGENITER, &obj) == -1) break; printactivenat(&nat, opts, 1); if (nat.nat_aps) printaps(nat.nat_aps, opts); nsp->ns_instances = nat.nat_next; } if (opts & OPT_VERBOSE) showhostmap_live(fd, nsp); } /* * Display the active host mapping table. */ void showhostmap_live(fd, nsp) int fd; natstat_t *nsp; { hostmap_t hm, *hmp; ipfgeniter_t iter; ipfobj_t obj; bzero((char *)&obj, sizeof(obj)); obj.ipfo_rev = IPFILTER_VERSION; obj.ipfo_type = IPFOBJ_GENITER; obj.ipfo_size = sizeof(iter); obj.ipfo_ptr = &iter; iter.igi_type = IPFGENITER_HOSTMAP; iter.igi_nitems = 1; iter.igi_data = &hm; printf("\nList of active host mappings:\n"); while (nsp->ns_maplist != NULL) { if (ioctl(fd, SIOCGENITER, &obj) == -1) break; printhostmap(&hm, 0); nsp->ns_maplist = hm.hm_next; } }