/* $OpenBSD: pfctl_table.c,v 1.65 2007/01/18 20:45:55 henning Exp $ */ /* * Copyright (c) 2002 Cedric Berger * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pfctl_parser.h" #include "pfctl.h" extern void usage(void); static int pfctl_table(int, char *[], char *, const char *, char *, const char *, int); static void print_table(struct pfr_table *, int, int); static void print_tstats(struct pfr_tstats *, int); static int load_addr(struct pfr_buffer *, int, char *[], char *, int); static void print_addrx(struct pfr_addr *, struct pfr_addr *, int); static void print_astats(struct pfr_astats *, int); static void radix_perror(void); static void xprintf(int, const char *, ...); static void print_iface(struct pfi_kif *, int); static const char *stats_text[PFR_DIR_MAX][PFR_OP_TABLE_MAX] = { { "In/Block:", "In/Pass:", "In/XPass:" }, { "Out/Block:", "Out/Pass:", "Out/XPass:" } }; static const char *istats_text[2][2][2] = { { { "In4/Pass:", "In4/Block:" }, { "Out4/Pass:", "Out4/Block:" } }, { { "In6/Pass:", "In6/Block:" }, { "Out6/Pass:", "Out6/Block:" } } }; #define RVTEST(fct) do { \ if ((!(opts & PF_OPT_NOACTION) || \ (opts & PF_OPT_DUMMYACTION)) && \ (fct)) { \ radix_perror(); \ goto _error; \ } \ } while (0) #define CREATE_TABLE do { \ table.pfrt_flags |= PFR_TFLAG_PERSIST; \ if ((!(opts & PF_OPT_NOACTION) || \ (opts & PF_OPT_DUMMYACTION)) && \ (pfr_add_tables(&table, 1, &nadd, flags)) && \ (errno != EPERM)) { \ radix_perror(); \ goto _error; \ } \ if (nadd) { \ warn_namespace_collision(table.pfrt_name); \ xprintf(opts, "%d table created", nadd); \ if (opts & PF_OPT_NOACTION) \ return (0); \ } \ table.pfrt_flags &= ~PFR_TFLAG_PERSIST; \ } while(0) int pfctl_clear_tables(const char *anchor, int opts) { return pfctl_table(0, NULL, NULL, "-F", NULL, anchor, opts); } int pfctl_show_tables(const char *anchor, int opts) { return pfctl_table(0, NULL, NULL, "-s", NULL, anchor, opts); } int pfctl_command_tables(int argc, char *argv[], char *tname, const char *command, char *file, const char *anchor, int opts) { if (tname == NULL || command == NULL) usage(); return pfctl_table(argc, argv, tname, command, file, anchor, opts); } int pfctl_table(int argc, char *argv[], char *tname, const char *command, char *file, const char *anchor, int opts) { struct pfr_table table; struct pfr_buffer b, b2; struct pfr_addr *a, *a2; int nadd = 0, ndel = 0, nchange = 0, nzero = 0; int rv = 0, flags = 0, nmatch = 0; void *p; if (command == NULL) usage(); if (opts & PF_OPT_NOACTION) flags |= PFR_FLAG_DUMMY; bzero(&b, sizeof(b)); bzero(&b2, sizeof(b2)); bzero(&table, sizeof(table)); if (tname != NULL) { if (strlen(tname) >= PF_TABLE_NAME_SIZE) usage(); if (strlcpy(table.pfrt_name, tname, sizeof(table.pfrt_name)) >= sizeof(table.pfrt_name)) errx(1, "pfctl_table: strlcpy"); } if (strlcpy(table.pfrt_anchor, anchor, sizeof(table.pfrt_anchor)) >= sizeof(table.pfrt_anchor)) errx(1, "pfctl_table: strlcpy"); if (!strcmp(command, "-F")) { if (argc || file != NULL) usage(); RVTEST(pfr_clr_tables(&table, &ndel, flags)); xprintf(opts, "%d tables deleted", ndel); } else if (!strcmp(command, "-s")) { b.pfrb_type = (opts & PF_OPT_VERBOSE2) ? PFRB_TSTATS : PFRB_TABLES; if (argc || file != NULL) usage(); for (;;) { pfr_buf_grow(&b, b.pfrb_size); b.pfrb_size = b.pfrb_msize; if (opts & PF_OPT_VERBOSE2) RVTEST(pfr_get_tstats(&table, b.pfrb_caddr, &b.pfrb_size, flags)); else RVTEST(pfr_get_tables(&table, b.pfrb_caddr, &b.pfrb_size, flags)); if (b.pfrb_size <= b.pfrb_msize) break; } if (opts & PF_OPT_SHOWALL && b.pfrb_size > 0) pfctl_print_title("TABLES:"); PFRB_FOREACH(p, &b) if (opts & PF_OPT_VERBOSE2) print_tstats(p, opts & PF_OPT_DEBUG); else print_table(p, opts & PF_OPT_VERBOSE, opts & PF_OPT_DEBUG); } else if (!strcmp(command, "kill")) { if (argc || file != NULL) usage(); RVTEST(pfr_del_tables(&table, 1, &ndel, flags)); xprintf(opts, "%d table deleted", ndel); } else if (!strcmp(command, "flush")) { if (argc || file != NULL) usage(); RVTEST(pfr_clr_addrs(&table, &ndel, flags)); xprintf(opts, "%d addresses deleted", ndel); } else if (!strcmp(command, "add")) { b.pfrb_type = PFRB_ADDRS; if (load_addr(&b, argc, argv, file, 0)) goto _error; CREATE_TABLE; if (opts & PF_OPT_VERBOSE) flags |= PFR_FLAG_FEEDBACK; RVTEST(pfr_add_addrs(&table, b.pfrb_caddr, b.pfrb_size, &nadd, flags)); xprintf(opts, "%d/%d addresses added", nadd, b.pfrb_size); if (opts & PF_OPT_VERBOSE) PFRB_FOREACH(a, &b) if ((opts & PF_OPT_VERBOSE2) || a->pfra_fback) print_addrx(a, NULL, opts & PF_OPT_USEDNS); } else if (!strcmp(command, "delete")) { b.pfrb_type = PFRB_ADDRS; if (load_addr(&b, argc, argv, file, 0)) goto _error; if (opts & PF_OPT_VERBOSE) flags |= PFR_FLAG_FEEDBACK; RVTEST(pfr_del_addrs(&table, b.pfrb_caddr, b.pfrb_size, &ndel, flags)); xprintf(opts, "%d/%d addresses deleted", ndel, b.pfrb_size); if (opts & PF_OPT_VERBOSE) PFRB_FOREACH(a, &b) if ((opts & PF_OPT_VERBOSE2) || a->pfra_fback) print_addrx(a, NULL, opts & PF_OPT_USEDNS); } else if (!strcmp(command, "replace")) { b.pfrb_type = PFRB_ADDRS; if (load_addr(&b, argc, argv, file, 0)) goto _error; CREATE_TABLE; if (opts & PF_OPT_VERBOSE) flags |= PFR_FLAG_FEEDBACK; for (;;) { int sz2 = b.pfrb_msize; RVTEST(pfr_set_addrs(&table, b.pfrb_caddr, b.pfrb_size, &sz2, &nadd, &ndel, &nchange, flags)); if (sz2 <= b.pfrb_msize) { b.pfrb_size = sz2; break; } else pfr_buf_grow(&b, sz2); } if (nadd) xprintf(opts, "%d addresses added", nadd); if (ndel) xprintf(opts, "%d addresses deleted", ndel); if (nchange) xprintf(opts, "%d addresses changed", nchange); if (!nadd && !ndel && !nchange) xprintf(opts, "no changes"); if (opts & PF_OPT_VERBOSE) PFRB_FOREACH(a, &b) if ((opts & PF_OPT_VERBOSE2) || a->pfra_fback) print_addrx(a, NULL, opts & PF_OPT_USEDNS); } else if (!strcmp(command, "expire")) { const char *errstr; u_int lifetime; b.pfrb_type = PFRB_ASTATS; b2.pfrb_type = PFRB_ADDRS; if (argc != 1 || file != NULL) usage(); lifetime = strtonum(*argv, 0, UINT_MAX, &errstr); if (errstr) errx(1, "expiry time: %s", errstr); for (;;) { pfr_buf_grow(&b, b.pfrb_size); b.pfrb_size = b.pfrb_msize; RVTEST(pfr_get_astats(&table, b.pfrb_caddr, &b.pfrb_size, flags)); if (b.pfrb_size <= b.pfrb_msize) break; } PFRB_FOREACH(p, &b) if (time(NULL) - ((struct pfr_astats *)p)->pfras_tzero > lifetime) if (pfr_buf_add(&b2, &((struct pfr_astats *)p)->pfras_a)) err(1, "duplicate buffer"); if (opts & PF_OPT_VERBOSE) flags |= PFR_FLAG_FEEDBACK; RVTEST(pfr_del_addrs(&table, b2.pfrb_caddr, b2.pfrb_size, &ndel, flags)); xprintf(opts, "%d/%d addresses expired", ndel, b2.pfrb_size); if (opts & PF_OPT_VERBOSE) PFRB_FOREACH(a, &b2) if ((opts & PF_OPT_VERBOSE2) || a->pfra_fback) print_addrx(a, NULL, opts & PF_OPT_USEDNS); } else if (!strcmp(command, "show")) { b.pfrb_type = (opts & PF_OPT_VERBOSE) ? PFRB_ASTATS : PFRB_ADDRS; if (argc || file != NULL) usage(); for (;;) { pfr_buf_grow(&b, b.pfrb_size); b.pfrb_size = b.pfrb_msize; if (opts & PF_OPT_VERBOSE) RVTEST(pfr_get_astats(&table, b.pfrb_caddr, &b.pfrb_size, flags)); else RVTEST(pfr_get_addrs(&table, b.pfrb_caddr, &b.pfrb_size, flags)); if (b.pfrb_size <= b.pfrb_msize) break; } PFRB_FOREACH(p, &b) if (opts & PF_OPT_VERBOSE) print_astats(p, opts & PF_OPT_USEDNS); else print_addrx(p, NULL, opts & PF_OPT_USEDNS); } else if (!strcmp(command, "test")) { b.pfrb_type = PFRB_ADDRS; b2.pfrb_type = PFRB_ADDRS; if (load_addr(&b, argc, argv, file, 1)) goto _error; if (opts & PF_OPT_VERBOSE2) { flags |= PFR_FLAG_REPLACE; PFRB_FOREACH(a, &b) if (pfr_buf_add(&b2, a)) err(1, "duplicate buffer"); } RVTEST(pfr_tst_addrs(&table, b.pfrb_caddr, b.pfrb_size, &nmatch, flags)); xprintf(opts, "%d/%d addresses match", nmatch, b.pfrb_size); if (opts & PF_OPT_VERBOSE && !(opts & PF_OPT_VERBOSE2)) PFRB_FOREACH(a, &b) if (a->pfra_fback == PFR_FB_MATCH) print_addrx(a, NULL, opts & PF_OPT_USEDNS); if (opts & PF_OPT_VERBOSE2) { a2 = NULL; PFRB_FOREACH(a, &b) { a2 = pfr_buf_next(&b2, a2); print_addrx(a2, a, opts & PF_OPT_USEDNS); } } if (nmatch < b.pfrb_size) rv = 2; } else if (!strcmp(command, "zero")) { if (argc || file != NULL) usage(); flags |= PFR_FLAG_ADDRSTOO; RVTEST(pfr_clr_tstats(&table, 1, &nzero, flags)); xprintf(opts, "%d table/stats cleared", nzero); } else warnx("pfctl_table: unknown command '%s'", command); goto _cleanup; _error: rv = -1; _cleanup: pfr_buf_clear(&b); pfr_buf_clear(&b2); return (rv); } void print_table(struct pfr_table *ta, int verbose, int debug) { if (!debug && !(ta->pfrt_flags & PFR_TFLAG_ACTIVE)) return; if (verbose) { printf("%c%c%c%c%c%c\t%s", (ta->pfrt_flags & PFR_TFLAG_CONST) ? 'c' : '-', (ta->pfrt_flags & PFR_TFLAG_PERSIST) ? 'p' : '-', (ta->pfrt_flags & PFR_TFLAG_ACTIVE) ? 'a' : '-', (ta->pfrt_flags & PFR_TFLAG_INACTIVE) ? 'i' : '-', (ta->pfrt_flags & PFR_TFLAG_REFERENCED) ? 'r' : '-', (ta->pfrt_flags & PFR_TFLAG_REFDANCHOR) ? 'h' : '-', ta->pfrt_name); if (ta->pfrt_anchor[0]) printf("\t%s", ta->pfrt_anchor); puts(""); } else puts(ta->pfrt_name); } void print_tstats(struct pfr_tstats *ts, int debug) { time_t time = ts->pfrts_tzero; int dir, op; if (!debug && !(ts->pfrts_flags & PFR_TFLAG_ACTIVE)) return; print_table(&ts->pfrts_t, 1, debug); printf("\tAddresses: %d\n", ts->pfrts_cnt); printf("\tCleared: %s", ctime(&time)); printf("\tReferences: [ Anchors: %-18d Rules: %-18d ]\n", ts->pfrts_refcnt[PFR_REFCNT_ANCHOR], ts->pfrts_refcnt[PFR_REFCNT_RULE]); printf("\tEvaluations: [ NoMatch: %-18llu Match: %-18llu ]\n", (unsigned long long)ts->pfrts_nomatch, (unsigned long long)ts->pfrts_match); for (dir = 0; dir < PFR_DIR_MAX; dir++) for (op = 0; op < PFR_OP_TABLE_MAX; op++) printf("\t%-12s [ Packets: %-18llu Bytes: %-18llu ]\n", stats_text[dir][op], (unsigned long long)ts->pfrts_packets[dir][op], (unsigned long long)ts->pfrts_bytes[dir][op]); } int load_addr(struct pfr_buffer *b, int argc, char *argv[], char *file, int nonetwork) { while (argc--) if (append_addr(b, *argv++, nonetwork)) { if (errno) warn("cannot decode %s", argv[-1]); return (-1); } if (pfr_buf_load(b, file, nonetwork, append_addr)) { warn("cannot load %s", file); return (-1); } return (0); } void print_addrx(struct pfr_addr *ad, struct pfr_addr *rad, int dns) { char ch, buf[256] = "{error}"; char fb[] = { ' ', 'M', 'A', 'D', 'C', 'Z', 'X', ' ', 'Y' }; unsigned int fback, hostnet; fback = (rad != NULL) ? rad->pfra_fback : ad->pfra_fback; ch = (fback < sizeof(fb)/sizeof(*fb)) ? fb[fback] : '?'; hostnet = (ad->pfra_af == AF_INET6) ? 128 : 32; inet_ntop(ad->pfra_af, &ad->pfra_u, buf, sizeof(buf)); printf("%c %c%s", ch, (ad->pfra_not?'!':' '), buf); if (ad->pfra_net < hostnet) printf("/%d", ad->pfra_net); if (rad != NULL && fback != PFR_FB_NONE) { if (strlcpy(buf, "{error}", sizeof(buf)) >= sizeof(buf)) errx(1, "print_addrx: strlcpy"); inet_ntop(rad->pfra_af, &rad->pfra_u, buf, sizeof(buf)); printf("\t%c%s", (rad->pfra_not?'!':' '), buf); if (rad->pfra_net < hostnet) printf("/%d", rad->pfra_net); } if (rad != NULL && fback == PFR_FB_NONE) printf("\t nomatch"); if (dns && ad->pfra_net == hostnet) { char host[NI_MAXHOST]; union sockaddr_union sa; strlcpy(host, "?", sizeof(host)); bzero(&sa, sizeof(sa)); sa.sa.sa_family = ad->pfra_af; if (sa.sa.sa_family == AF_INET) { sa.sa.sa_len = sizeof(sa.sin); sa.sin.sin_addr = ad->pfra_ip4addr; } else { sa.sa.sa_len = sizeof(sa.sin6); sa.sin6.sin6_addr = ad->pfra_ip6addr; } if (getnameinfo(&sa.sa, sa.sa.sa_len, host, sizeof(host), NULL, 0, NI_NAMEREQD) == 0) printf("\t(%s)", host); } printf("\n"); } void print_astats(struct pfr_astats *as, int dns) { time_t time = as->pfras_tzero; int dir, op; print_addrx(&as->pfras_a, NULL, dns); printf("\tCleared: %s", ctime(&time)); for (dir = 0; dir < PFR_DIR_MAX; dir++) for (op = 0; op < PFR_OP_ADDR_MAX; op++) printf("\t%-12s [ Packets: %-18llu Bytes: %-18llu ]\n", stats_text[dir][op], (unsigned long long)as->pfras_packets[dir][op], (unsigned long long)as->pfras_bytes[dir][op]); } void radix_perror(void) { extern char *__progname; fprintf(stderr, "%s: %s.\n", __progname, pfr_strerror(errno)); } int pfctl_define_table(char *name, int flags, int addrs, const char *anchor, struct pfr_buffer *ab, u_int32_t ticket) { struct pfr_table tbl; bzero(&tbl, sizeof(tbl)); if (strlcpy(tbl.pfrt_name, name, sizeof(tbl.pfrt_name)) >= sizeof(tbl.pfrt_name) || strlcpy(tbl.pfrt_anchor, anchor, sizeof(tbl.pfrt_anchor)) >= sizeof(tbl.pfrt_anchor)) errx(1, "pfctl_define_table: strlcpy"); tbl.pfrt_flags = flags; return pfr_ina_define(&tbl, ab->pfrb_caddr, ab->pfrb_size, NULL, NULL, ticket, addrs ? PFR_FLAG_ADDRSTOO : 0); } void warn_namespace_collision(const char *filter) { struct pfr_buffer b; struct pfr_table *t; const char *name = NULL, *lastcoll; int coll = 0; bzero(&b, sizeof(b)); b.pfrb_type = PFRB_TABLES; for (;;) { pfr_buf_grow(&b, b.pfrb_size); b.pfrb_size = b.pfrb_msize; if (pfr_get_tables(NULL, b.pfrb_caddr, &b.pfrb_size, PFR_FLAG_ALLRSETS)) err(1, "pfr_get_tables"); if (b.pfrb_size <= b.pfrb_msize) break; } PFRB_FOREACH(t, &b) { if (!(t->pfrt_flags & PFR_TFLAG_ACTIVE)) continue; if (filter != NULL && strcmp(filter, t->pfrt_name)) continue; if (!t->pfrt_anchor[0]) name = t->pfrt_name; else if (name != NULL && !strcmp(name, t->pfrt_name)) { coll++; lastcoll = name; name = NULL; } } if (coll == 1) warnx("warning: namespace collision with <%s> global table.", lastcoll); else if (coll > 1) warnx("warning: namespace collisions with %d global tables.", coll); pfr_buf_clear(&b); } void xprintf(int opts, const char *fmt, ...) { va_list args; if (opts & PF_OPT_QUIET) return; va_start(args, fmt); vfprintf(stderr, fmt, args); va_end(args); if (opts & PF_OPT_DUMMYACTION) fprintf(stderr, " (dummy).\n"); else if (opts & PF_OPT_NOACTION) fprintf(stderr, " (syntax only).\n"); else fprintf(stderr, ".\n"); } /* interface stuff */ int pfctl_show_ifaces(const char *filter, int opts) { struct pfr_buffer b; struct pfi_kif *p; int i = 0; bzero(&b, sizeof(b)); b.pfrb_type = PFRB_IFACES; for (;;) { pfr_buf_grow(&b, b.pfrb_size); b.pfrb_size = b.pfrb_msize; if (pfi_get_ifaces(filter, b.pfrb_caddr, &b.pfrb_size)) { radix_perror(); return (1); } if (b.pfrb_size <= b.pfrb_msize) break; i++; } if (opts & PF_OPT_SHOWALL) pfctl_print_title("INTERFACES:"); PFRB_FOREACH(p, &b) print_iface(p, opts); return (0); } void print_iface(struct pfi_kif *p, int opts) { time_t tzero = p->pfik_tzero; int i, af, dir, act; printf("%s", p->pfik_name); if (opts & PF_OPT_VERBOSE) { if (p->pfik_flags & PFI_IFLAG_SKIP) printf(" (skip)"); } printf("\n"); if (!(opts & PF_OPT_VERBOSE2)) return; printf("\tCleared: %s", ctime(&tzero)); printf("\tReferences: [ States: %-18d Rules: %-18d ]\n", p->pfik_states, p->pfik_rules); for (i = 0; i < 8; i++) { af = (i>>2) & 1; dir = (i>>1) &1; act = i & 1; printf("\t%-12s [ Packets: %-18llu Bytes: %-18llu ]\n", istats_text[af][dir][act], (unsigned long long)p->pfik_packets[af][dir][act], (unsigned long long)p->pfik_bytes[af][dir][act]); } }