/* $OpenBSD: pfctl.c,v 1.278 2008/08/31 20:18:17 jmc Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2001 Daniel Hartmeier * Copyright (c) 2002,2003 Henning Brauer * 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 __FBSDID("$FreeBSD$"); #define PFIOC_USE_LATEST #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pfctl_parser.h" #include "pfctl.h" void usage(void); int pfctl_enable(int, int); int pfctl_disable(int, int); int pfctl_clear_stats(int, int); int pfctl_get_skip_ifaces(void); int pfctl_check_skip_ifaces(char *); int pfctl_adjust_skip_ifaces(struct pfctl *); int pfctl_clear_interface_flags(int, int); int pfctl_flush_eth_rules(int, int, char *); int pfctl_flush_rules(int, int, char *); int pfctl_flush_nat(int, int, char *); int pfctl_clear_altq(int, int); int pfctl_clear_src_nodes(int, int); int pfctl_clear_iface_states(int, const char *, int); void pfctl_addrprefix(char *, struct pf_addr *); int pfctl_kill_src_nodes(int, const char *, int); int pfctl_net_kill_states(int, const char *, int); int pfctl_gateway_kill_states(int, const char *, int); int pfctl_label_kill_states(int, const char *, int); int pfctl_id_kill_states(int, const char *, int); void pfctl_init_options(struct pfctl *); int pfctl_load_options(struct pfctl *); int pfctl_load_limit(struct pfctl *, unsigned int, unsigned int); int pfctl_load_timeout(struct pfctl *, unsigned int, unsigned int); int pfctl_load_debug(struct pfctl *, unsigned int); int pfctl_load_logif(struct pfctl *, char *); int pfctl_load_hostid(struct pfctl *, u_int32_t); int pfctl_load_syncookies(struct pfctl *, u_int8_t); int pfctl_get_pool(int, struct pfctl_pool *, u_int32_t, u_int32_t, int, char *); void pfctl_print_eth_rule_counters(struct pfctl_eth_rule *, int); void pfctl_print_rule_counters(struct pfctl_rule *, int); int pfctl_show_eth_rules(int, char *, int, enum pfctl_show, char *, int); int pfctl_show_rules(int, char *, int, enum pfctl_show, char *, int); int pfctl_show_nat(int, char *, int, char *, int); int pfctl_show_src_nodes(int, int); int pfctl_show_states(int, const char *, int); int pfctl_show_status(int, int); int pfctl_show_running(int); int pfctl_show_timeouts(int, int); int pfctl_show_limits(int, int); void pfctl_debug(int, u_int32_t, int); int pfctl_test_altqsupport(int, int); int pfctl_show_anchors(int, int, char *); int pfctl_show_eth_anchors(int, int, char *); int pfctl_ruleset_trans(struct pfctl *, char *, struct pfctl_anchor *, bool); int pfctl_eth_ruleset_trans(struct pfctl *, char *, struct pfctl_eth_anchor *); int pfctl_load_eth_ruleset(struct pfctl *, char *, struct pfctl_eth_ruleset *, int); int pfctl_load_eth_rule(struct pfctl *, char *, struct pfctl_eth_rule *, int); int pfctl_load_ruleset(struct pfctl *, char *, struct pfctl_ruleset *, int, int); int pfctl_load_rule(struct pfctl *, char *, struct pfctl_rule *, int); const char *pfctl_lookup_option(char *, const char * const *); static struct pfctl_anchor_global pf_anchors; struct pfctl_anchor pf_main_anchor; struct pfctl_eth_anchor pf_eth_main_anchor; static struct pfr_buffer skip_b; static const char *clearopt; static char *rulesopt; static const char *showopt; static const char *debugopt; static char *anchoropt; static const char *optiopt = NULL; static const char *pf_device = "/dev/pf"; static char *ifaceopt; static char *tableopt; static const char *tblcmdopt; static int src_node_killers; static char *src_node_kill[2]; static int state_killers; static char *state_kill[2]; int loadopt; int altqsupport; int dev = -1; static int first_title = 1; static int labels = 0; #define INDENT(d, o) do { \ if (o) { \ int i; \ for (i=0; i < d; i++) \ printf(" "); \ } \ } while (0); \ static const struct { const char *name; int index; } pf_limits[] = { { "states", PF_LIMIT_STATES }, { "src-nodes", PF_LIMIT_SRC_NODES }, { "frags", PF_LIMIT_FRAGS }, { "table-entries", PF_LIMIT_TABLE_ENTRIES }, { NULL, 0 } }; struct pf_hint { const char *name; int timeout; }; static const struct pf_hint pf_hint_normal[] = { { "tcp.first", 2 * 60 }, { "tcp.opening", 30 }, { "tcp.established", 24 * 60 * 60 }, { "tcp.closing", 15 * 60 }, { "tcp.finwait", 45 }, { "tcp.closed", 90 }, { "tcp.tsdiff", 30 }, { NULL, 0 } }; static const struct pf_hint pf_hint_satellite[] = { { "tcp.first", 3 * 60 }, { "tcp.opening", 30 + 5 }, { "tcp.established", 24 * 60 * 60 }, { "tcp.closing", 15 * 60 + 5 }, { "tcp.finwait", 45 + 5 }, { "tcp.closed", 90 + 5 }, { "tcp.tsdiff", 60 }, { NULL, 0 } }; static const struct pf_hint pf_hint_conservative[] = { { "tcp.first", 60 * 60 }, { "tcp.opening", 15 * 60 }, { "tcp.established", 5 * 24 * 60 * 60 }, { "tcp.closing", 60 * 60 }, { "tcp.finwait", 10 * 60 }, { "tcp.closed", 3 * 60 }, { "tcp.tsdiff", 60 }, { NULL, 0 } }; static const struct pf_hint pf_hint_aggressive[] = { { "tcp.first", 30 }, { "tcp.opening", 5 }, { "tcp.established", 5 * 60 * 60 }, { "tcp.closing", 60 }, { "tcp.finwait", 30 }, { "tcp.closed", 30 }, { "tcp.tsdiff", 10 }, { NULL, 0 } }; static const struct { const char *name; const struct pf_hint *hint; } pf_hints[] = { { "normal", pf_hint_normal }, { "satellite", pf_hint_satellite }, { "high-latency", pf_hint_satellite }, { "conservative", pf_hint_conservative }, { "aggressive", pf_hint_aggressive }, { NULL, NULL } }; static const char * const clearopt_list[] = { "nat", "queue", "rules", "Sources", "states", "info", "Tables", "osfp", "all", "ethernet", NULL }; static const char * const showopt_list[] = { "ether", "nat", "queue", "rules", "Anchors", "Sources", "states", "info", "Interfaces", "labels", "timeouts", "memory", "Tables", "osfp", "Running", "all", NULL }; static const char * const tblcmdopt_list[] = { "kill", "flush", "add", "delete", "load", "replace", "show", "test", "zero", "expire", NULL }; static const char * const debugopt_list[] = { "none", "urgent", "misc", "loud", NULL }; static const char * const optiopt_list[] = { "none", "basic", "profile", NULL }; void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s [-AdeghMmNnOPqRrvz] [-a anchor] [-D macro=value] [-F modifier]\n" "\t[-f file] [-i interface] [-K host | network]\n" "\t[-k host | network | gateway | label | id] [-o level] [-p device]\n" "\t[-s modifier] [-t table -T command [address ...]] [-x level]\n", __progname); exit(1); } /* * Cache protocol number to name translations. * * Translation is performed a lot e.g., when dumping states and * getprotobynumber is incredibly expensive. * * Note from the getprotobynumber(3) manpage: * * These functions use a thread-specific data space; if the data is needed * for future use, it should be copied before any subsequent calls overwrite * it. Only the Internet protocols are currently understood. * * * Consequently we only cache the name and strdup it for safety. * * At the time of writing this comment the last entry in /etc/protocols is: * divert 258 DIVERT # Divert pseudo-protocol [non IANA] */ const char * pfctl_proto2name(int proto) { static const char *pfctl_proto_cache[259]; struct protoent *p; if (proto >= nitems(pfctl_proto_cache)) { p = getprotobynumber(proto); if (p == NULL) { return (NULL); } return (p->p_name); } if (pfctl_proto_cache[proto] == NULL) { p = getprotobynumber(proto); if (p == NULL) { return (NULL); } pfctl_proto_cache[proto] = strdup(p->p_name); } return (pfctl_proto_cache[proto]); } int pfctl_enable(int dev, int opts) { if (ioctl(dev, DIOCSTART)) { if (errno == EEXIST) errx(1, "pf already enabled"); else if (errno == ESRCH) errx(1, "pfil registeration failed"); else err(1, "DIOCSTART"); } if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "pf enabled\n"); if (altqsupport && ioctl(dev, DIOCSTARTALTQ)) if (errno != EEXIST) err(1, "DIOCSTARTALTQ"); return (0); } int pfctl_disable(int dev, int opts) { if (ioctl(dev, DIOCSTOP)) { if (errno == ENOENT) errx(1, "pf not enabled"); else err(1, "DIOCSTOP"); } if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "pf disabled\n"); if (altqsupport && ioctl(dev, DIOCSTOPALTQ)) if (errno != ENOENT) err(1, "DIOCSTOPALTQ"); return (0); } int pfctl_clear_stats(int dev, int opts) { if (ioctl(dev, DIOCCLRSTATUS)) err(1, "DIOCCLRSTATUS"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "pf: statistics cleared\n"); return (0); } int pfctl_get_skip_ifaces(void) { bzero(&skip_b, sizeof(skip_b)); skip_b.pfrb_type = PFRB_IFACES; for (;;) { pfr_buf_grow(&skip_b, skip_b.pfrb_size); skip_b.pfrb_size = skip_b.pfrb_msize; if (pfi_get_ifaces(NULL, skip_b.pfrb_caddr, &skip_b.pfrb_size)) err(1, "pfi_get_ifaces"); if (skip_b.pfrb_size <= skip_b.pfrb_msize) break; } return (0); } int pfctl_check_skip_ifaces(char *ifname) { struct pfi_kif *p; struct node_host *h = NULL, *n = NULL; PFRB_FOREACH(p, &skip_b) { if (!strcmp(ifname, p->pfik_name) && (p->pfik_flags & PFI_IFLAG_SKIP)) p->pfik_flags &= ~PFI_IFLAG_SKIP; if (!strcmp(ifname, p->pfik_name) && p->pfik_group != NULL) { if ((h = ifa_grouplookup(p->pfik_name, 0)) == NULL) continue; for (n = h; n != NULL; n = n->next) { if (p->pfik_ifp == NULL) continue; if (strncmp(p->pfik_name, ifname, IFNAMSIZ)) continue; p->pfik_flags &= ~PFI_IFLAG_SKIP; } } } return (0); } int pfctl_adjust_skip_ifaces(struct pfctl *pf) { struct pfi_kif *p, *pp; struct node_host *h = NULL, *n = NULL; PFRB_FOREACH(p, &skip_b) { if (p->pfik_group == NULL || !(p->pfik_flags & PFI_IFLAG_SKIP)) continue; pfctl_set_interface_flags(pf, p->pfik_name, PFI_IFLAG_SKIP, 0); if ((h = ifa_grouplookup(p->pfik_name, 0)) == NULL) continue; for (n = h; n != NULL; n = n->next) PFRB_FOREACH(pp, &skip_b) { if (pp->pfik_ifp == NULL) continue; if (strncmp(pp->pfik_name, n->ifname, IFNAMSIZ)) continue; if (!(pp->pfik_flags & PFI_IFLAG_SKIP)) pfctl_set_interface_flags(pf, pp->pfik_name, PFI_IFLAG_SKIP, 1); if (pp->pfik_flags & PFI_IFLAG_SKIP) pp->pfik_flags &= ~PFI_IFLAG_SKIP; } } PFRB_FOREACH(p, &skip_b) { if (p->pfik_ifp == NULL || ! (p->pfik_flags & PFI_IFLAG_SKIP)) continue; pfctl_set_interface_flags(pf, p->pfik_name, PFI_IFLAG_SKIP, 0); } return (0); } int pfctl_clear_interface_flags(int dev, int opts) { struct pfioc_iface pi; if ((opts & PF_OPT_NOACTION) == 0) { bzero(&pi, sizeof(pi)); pi.pfiio_flags = PFI_IFLAG_SKIP; if (ioctl(dev, DIOCCLRIFFLAG, &pi)) err(1, "DIOCCLRIFFLAG"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "pf: interface flags reset\n"); } return (0); } int pfctl_flush_eth_rules(int dev, int opts, char *anchorname) { int ret; ret = pfctl_clear_eth_rules(dev, anchorname); if (ret != 0) err(1, "pfctl_clear_eth_rules"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "Ethernet rules cleared\n"); return (ret); } int pfctl_flush_rules(int dev, int opts, char *anchorname) { int ret; ret = pfctl_clear_rules(dev, anchorname); if (ret != 0) err(1, "pfctl_clear_rules"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "rules cleared\n"); return (0); } int pfctl_flush_nat(int dev, int opts, char *anchorname) { int ret; ret = pfctl_clear_nat(dev, anchorname); if (ret != 0) err(1, "pfctl_clear_nat"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "nat cleared\n"); return (0); } int pfctl_clear_altq(int dev, int opts) { struct pfr_buffer t; if (!altqsupport) return (-1); memset(&t, 0, sizeof(t)); t.pfrb_type = PFRB_TRANS; if (pfctl_add_trans(&t, PF_RULESET_ALTQ, "") || pfctl_trans(dev, &t, DIOCXBEGIN, 0) || pfctl_trans(dev, &t, DIOCXCOMMIT, 0)) err(1, "pfctl_clear_altq"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "altq cleared\n"); return (0); } int pfctl_clear_src_nodes(int dev, int opts) { if (ioctl(dev, DIOCCLRSRCNODES)) err(1, "DIOCCLRSRCNODES"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "source tracking entries cleared\n"); return (0); } int pfctl_clear_iface_states(int dev, const char *iface, int opts) { struct pfctl_kill kill; unsigned int killed; memset(&kill, 0, sizeof(kill)); if (iface != NULL && strlcpy(kill.ifname, iface, sizeof(kill.ifname)) >= sizeof(kill.ifname)) errx(1, "invalid interface: %s", iface); if (opts & PF_OPT_KILLMATCH) kill.kill_match = true; if (pfctl_clear_states(dev, &kill, &killed)) err(1, "DIOCCLRSTATES"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "%d states cleared\n", killed); return (0); } void pfctl_addrprefix(char *addr, struct pf_addr *mask) { char *p; const char *errstr; int prefix, ret_ga, q, r; struct addrinfo hints, *res; if ((p = strchr(addr, '/')) == NULL) return; *p++ = '\0'; prefix = strtonum(p, 0, 128, &errstr); if (errstr) errx(1, "prefix is %s: %s", errstr, p); bzero(&hints, sizeof(hints)); /* prefix only with numeric addresses */ hints.ai_flags |= AI_NUMERICHOST; if ((ret_ga = getaddrinfo(addr, NULL, &hints, &res))) { errx(1, "getaddrinfo: %s", gai_strerror(ret_ga)); /* NOTREACHED */ } if (res->ai_family == AF_INET && prefix > 32) errx(1, "prefix too long for AF_INET"); else if (res->ai_family == AF_INET6 && prefix > 128) errx(1, "prefix too long for AF_INET6"); q = prefix >> 3; r = prefix & 7; switch (res->ai_family) { case AF_INET: bzero(&mask->v4, sizeof(mask->v4)); mask->v4.s_addr = htonl((u_int32_t) (0xffffffffffULL << (32 - prefix))); break; case AF_INET6: bzero(&mask->v6, sizeof(mask->v6)); if (q > 0) memset((void *)&mask->v6, 0xff, q); if (r > 0) *((u_char *)&mask->v6 + q) = (0xff00 >> r) & 0xff; break; } freeaddrinfo(res); } int pfctl_kill_src_nodes(int dev, const char *iface, int opts) { struct pfioc_src_node_kill psnk; struct addrinfo *res[2], *resp[2]; struct sockaddr last_src, last_dst; int killed, sources, dests; int ret_ga; killed = sources = dests = 0; memset(&psnk, 0, sizeof(psnk)); memset(&psnk.psnk_src.addr.v.a.mask, 0xff, sizeof(psnk.psnk_src.addr.v.a.mask)); memset(&last_src, 0xff, sizeof(last_src)); memset(&last_dst, 0xff, sizeof(last_dst)); pfctl_addrprefix(src_node_kill[0], &psnk.psnk_src.addr.v.a.mask); if ((ret_ga = getaddrinfo(src_node_kill[0], NULL, NULL, &res[0]))) { errx(1, "getaddrinfo: %s", gai_strerror(ret_ga)); /* NOTREACHED */ } for (resp[0] = res[0]; resp[0]; resp[0] = resp[0]->ai_next) { if (resp[0]->ai_addr == NULL) continue; /* We get lots of duplicates. Catch the easy ones */ if (memcmp(&last_src, resp[0]->ai_addr, sizeof(last_src)) == 0) continue; last_src = *(struct sockaddr *)resp[0]->ai_addr; psnk.psnk_af = resp[0]->ai_family; sources++; if (psnk.psnk_af == AF_INET) psnk.psnk_src.addr.v.a.addr.v4 = ((struct sockaddr_in *)resp[0]->ai_addr)->sin_addr; else if (psnk.psnk_af == AF_INET6) psnk.psnk_src.addr.v.a.addr.v6 = ((struct sockaddr_in6 *)resp[0]->ai_addr)-> sin6_addr; else errx(1, "Unknown address family %d", psnk.psnk_af); if (src_node_killers > 1) { dests = 0; memset(&psnk.psnk_dst.addr.v.a.mask, 0xff, sizeof(psnk.psnk_dst.addr.v.a.mask)); memset(&last_dst, 0xff, sizeof(last_dst)); pfctl_addrprefix(src_node_kill[1], &psnk.psnk_dst.addr.v.a.mask); if ((ret_ga = getaddrinfo(src_node_kill[1], NULL, NULL, &res[1]))) { errx(1, "getaddrinfo: %s", gai_strerror(ret_ga)); /* NOTREACHED */ } for (resp[1] = res[1]; resp[1]; resp[1] = resp[1]->ai_next) { if (resp[1]->ai_addr == NULL) continue; if (psnk.psnk_af != resp[1]->ai_family) continue; if (memcmp(&last_dst, resp[1]->ai_addr, sizeof(last_dst)) == 0) continue; last_dst = *(struct sockaddr *)resp[1]->ai_addr; dests++; if (psnk.psnk_af == AF_INET) psnk.psnk_dst.addr.v.a.addr.v4 = ((struct sockaddr_in *)resp[1]-> ai_addr)->sin_addr; else if (psnk.psnk_af == AF_INET6) psnk.psnk_dst.addr.v.a.addr.v6 = ((struct sockaddr_in6 *)resp[1]-> ai_addr)->sin6_addr; else errx(1, "Unknown address family %d", psnk.psnk_af); if (ioctl(dev, DIOCKILLSRCNODES, &psnk)) err(1, "DIOCKILLSRCNODES"); killed += psnk.psnk_killed; } freeaddrinfo(res[1]); } else { if (ioctl(dev, DIOCKILLSRCNODES, &psnk)) err(1, "DIOCKILLSRCNODES"); killed += psnk.psnk_killed; } } freeaddrinfo(res[0]); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "killed %d src nodes from %d sources and %d " "destinations\n", killed, sources, dests); return (0); } int pfctl_net_kill_states(int dev, const char *iface, int opts) { struct pfctl_kill kill; struct addrinfo *res[2], *resp[2]; struct sockaddr last_src, last_dst; unsigned int newkilled; int killed, sources, dests; int ret_ga; killed = sources = dests = 0; memset(&kill, 0, sizeof(kill)); memset(&kill.src.addr.v.a.mask, 0xff, sizeof(kill.src.addr.v.a.mask)); memset(&last_src, 0xff, sizeof(last_src)); memset(&last_dst, 0xff, sizeof(last_dst)); if (iface != NULL && strlcpy(kill.ifname, iface, sizeof(kill.ifname)) >= sizeof(kill.ifname)) errx(1, "invalid interface: %s", iface); pfctl_addrprefix(state_kill[0], &kill.src.addr.v.a.mask); if (opts & PF_OPT_KILLMATCH) kill.kill_match = true; if ((ret_ga = getaddrinfo(state_kill[0], NULL, NULL, &res[0]))) { errx(1, "getaddrinfo: %s", gai_strerror(ret_ga)); /* NOTREACHED */ } for (resp[0] = res[0]; resp[0]; resp[0] = resp[0]->ai_next) { if (resp[0]->ai_addr == NULL) continue; /* We get lots of duplicates. Catch the easy ones */ if (memcmp(&last_src, resp[0]->ai_addr, sizeof(last_src)) == 0) continue; last_src = *(struct sockaddr *)resp[0]->ai_addr; kill.af = resp[0]->ai_family; sources++; if (kill.af == AF_INET) kill.src.addr.v.a.addr.v4 = ((struct sockaddr_in *)resp[0]->ai_addr)->sin_addr; else if (kill.af == AF_INET6) kill.src.addr.v.a.addr.v6 = ((struct sockaddr_in6 *)resp[0]->ai_addr)-> sin6_addr; else errx(1, "Unknown address family %d", kill.af); if (state_killers > 1) { dests = 0; memset(&kill.dst.addr.v.a.mask, 0xff, sizeof(kill.dst.addr.v.a.mask)); memset(&last_dst, 0xff, sizeof(last_dst)); pfctl_addrprefix(state_kill[1], &kill.dst.addr.v.a.mask); if ((ret_ga = getaddrinfo(state_kill[1], NULL, NULL, &res[1]))) { errx(1, "getaddrinfo: %s", gai_strerror(ret_ga)); /* NOTREACHED */ } for (resp[1] = res[1]; resp[1]; resp[1] = resp[1]->ai_next) { if (resp[1]->ai_addr == NULL) continue; if (kill.af != resp[1]->ai_family) continue; if (memcmp(&last_dst, resp[1]->ai_addr, sizeof(last_dst)) == 0) continue; last_dst = *(struct sockaddr *)resp[1]->ai_addr; dests++; if (kill.af == AF_INET) kill.dst.addr.v.a.addr.v4 = ((struct sockaddr_in *)resp[1]-> ai_addr)->sin_addr; else if (kill.af == AF_INET6) kill.dst.addr.v.a.addr.v6 = ((struct sockaddr_in6 *)resp[1]-> ai_addr)->sin6_addr; else errx(1, "Unknown address family %d", kill.af); if (pfctl_kill_states(dev, &kill, &newkilled)) err(1, "DIOCKILLSTATES"); killed += newkilled; } freeaddrinfo(res[1]); } else { if (pfctl_kill_states(dev, &kill, &newkilled)) err(1, "DIOCKILLSTATES"); killed += newkilled; } } freeaddrinfo(res[0]); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "killed %d states from %d sources and %d " "destinations\n", killed, sources, dests); return (0); } int pfctl_gateway_kill_states(int dev, const char *iface, int opts) { struct pfctl_kill kill; struct addrinfo *res, *resp; struct sockaddr last_src; unsigned int newkilled; int killed = 0; int ret_ga; if (state_killers != 2 || (strlen(state_kill[1]) == 0)) { warnx("no gateway specified"); usage(); } memset(&kill, 0, sizeof(kill)); memset(&kill.rt_addr.addr.v.a.mask, 0xff, sizeof(kill.rt_addr.addr.v.a.mask)); memset(&last_src, 0xff, sizeof(last_src)); if (iface != NULL && strlcpy(kill.ifname, iface, sizeof(kill.ifname)) >= sizeof(kill.ifname)) errx(1, "invalid interface: %s", iface); if (opts & PF_OPT_KILLMATCH) kill.kill_match = true; pfctl_addrprefix(state_kill[1], &kill.rt_addr.addr.v.a.mask); if ((ret_ga = getaddrinfo(state_kill[1], NULL, NULL, &res))) { errx(1, "getaddrinfo: %s", gai_strerror(ret_ga)); /* NOTREACHED */ } for (resp = res; resp; resp = resp->ai_next) { if (resp->ai_addr == NULL) continue; /* We get lots of duplicates. Catch the easy ones */ if (memcmp(&last_src, resp->ai_addr, sizeof(last_src)) == 0) continue; last_src = *(struct sockaddr *)resp->ai_addr; kill.af = resp->ai_family; if (kill.af == AF_INET) kill.rt_addr.addr.v.a.addr.v4 = ((struct sockaddr_in *)resp->ai_addr)->sin_addr; else if (kill.af == AF_INET6) kill.rt_addr.addr.v.a.addr.v6 = ((struct sockaddr_in6 *)resp->ai_addr)-> sin6_addr; else errx(1, "Unknown address family %d", kill.af); if (pfctl_kill_states(dev, &kill, &newkilled)) err(1, "DIOCKILLSTATES"); killed += newkilled; } freeaddrinfo(res); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "killed %d states\n", killed); return (0); } int pfctl_label_kill_states(int dev, const char *iface, int opts) { struct pfctl_kill kill; unsigned int killed; if (state_killers != 2 || (strlen(state_kill[1]) == 0)) { warnx("no label specified"); usage(); } memset(&kill, 0, sizeof(kill)); if (iface != NULL && strlcpy(kill.ifname, iface, sizeof(kill.ifname)) >= sizeof(kill.ifname)) errx(1, "invalid interface: %s", iface); if (opts & PF_OPT_KILLMATCH) kill.kill_match = true; if (strlcpy(kill.label, state_kill[1], sizeof(kill.label)) >= sizeof(kill.label)) errx(1, "label too long: %s", state_kill[1]); if (pfctl_kill_states(dev, &kill, &killed)) err(1, "DIOCKILLSTATES"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "killed %d states\n", killed); return (0); } int pfctl_id_kill_states(int dev, const char *iface, int opts) { struct pfctl_kill kill; unsigned int killed; if (state_killers != 2 || (strlen(state_kill[1]) == 0)) { warnx("no id specified"); usage(); } memset(&kill, 0, sizeof(kill)); if (opts & PF_OPT_KILLMATCH) kill.kill_match = true; if ((sscanf(state_kill[1], "%jx/%x", &kill.cmp.id, &kill.cmp.creatorid)) == 2) { } else if ((sscanf(state_kill[1], "%jx", &kill.cmp.id)) == 1) { kill.cmp.creatorid = 0; } else { warnx("wrong id format specified"); usage(); } if (kill.cmp.id == 0) { warnx("cannot kill id 0"); usage(); } if (pfctl_kill_states(dev, &kill, &killed)) err(1, "DIOCKILLSTATES"); if ((opts & PF_OPT_QUIET) == 0) fprintf(stderr, "killed %d states\n", killed); return (0); } int pfctl_get_pool(int dev, struct pfctl_pool *pool, u_int32_t nr, u_int32_t ticket, int r_action, char *anchorname) { struct pfioc_pooladdr pp; struct pf_pooladdr *pa; u_int32_t pnr, mpnr; memset(&pp, 0, sizeof(pp)); memcpy(pp.anchor, anchorname, sizeof(pp.anchor)); pp.r_action = r_action; pp.r_num = nr; pp.ticket = ticket; if (ioctl(dev, DIOCGETADDRS, &pp)) { warn("DIOCGETADDRS"); return (-1); } mpnr = pp.nr; TAILQ_INIT(&pool->list); for (pnr = 0; pnr < mpnr; ++pnr) { pp.nr = pnr; if (ioctl(dev, DIOCGETADDR, &pp)) { warn("DIOCGETADDR"); return (-1); } pa = calloc(1, sizeof(struct pf_pooladdr)); if (pa == NULL) err(1, "calloc"); bcopy(&pp.addr, pa, sizeof(struct pf_pooladdr)); TAILQ_INSERT_TAIL(&pool->list, pa, entries); } return (0); } void pfctl_move_pool(struct pfctl_pool *src, struct pfctl_pool *dst) { struct pf_pooladdr *pa; while ((pa = TAILQ_FIRST(&src->list)) != NULL) { TAILQ_REMOVE(&src->list, pa, entries); TAILQ_INSERT_TAIL(&dst->list, pa, entries); } } void pfctl_clear_pool(struct pfctl_pool *pool) { struct pf_pooladdr *pa; while ((pa = TAILQ_FIRST(&pool->list)) != NULL) { TAILQ_REMOVE(&pool->list, pa, entries); free(pa); } } void pfctl_print_eth_rule_counters(struct pfctl_eth_rule *rule, int opts) { if (opts & PF_OPT_VERBOSE) { printf(" [ Evaluations: %-8llu Packets: %-8llu " "Bytes: %-10llu]\n", (unsigned long long)rule->evaluations, (unsigned long long)(rule->packets[0] + rule->packets[1]), (unsigned long long)(rule->bytes[0] + rule->bytes[1])); } } void pfctl_print_rule_counters(struct pfctl_rule *rule, int opts) { if (opts & PF_OPT_DEBUG) { const char *t[PF_SKIP_COUNT] = { "i", "d", "f", "p", "sa", "sp", "da", "dp" }; int i; printf(" [ Skip steps: "); for (i = 0; i < PF_SKIP_COUNT; ++i) { if (rule->skip[i].nr == rule->nr + 1) continue; printf("%s=", t[i]); if (rule->skip[i].nr == -1) printf("end "); else printf("%u ", rule->skip[i].nr); } printf("]\n"); printf(" [ queue: qname=%s qid=%u pqname=%s pqid=%u ]\n", rule->qname, rule->qid, rule->pqname, rule->pqid); } if (opts & PF_OPT_VERBOSE) { printf(" [ Evaluations: %-8llu Packets: %-8llu " "Bytes: %-10llu States: %-6ju]\n", (unsigned long long)rule->evaluations, (unsigned long long)(rule->packets[0] + rule->packets[1]), (unsigned long long)(rule->bytes[0] + rule->bytes[1]), (uintmax_t)rule->states_cur); if (!(opts & PF_OPT_DEBUG)) printf(" [ Inserted: uid %u pid %u " "State Creations: %-6ju]\n", (unsigned)rule->cuid, (unsigned)rule->cpid, (uintmax_t)rule->states_tot); } } void pfctl_print_title(char *title) { if (!first_title) printf("\n"); first_title = 0; printf("%s\n", title); } int pfctl_show_eth_rules(int dev, char *path, int opts, enum pfctl_show format, char *anchorname, int depth) { char anchor_call[MAXPATHLEN]; struct pfctl_eth_rules_info info; struct pfctl_eth_rule rule; int dotitle = opts & PF_OPT_SHOWALL; int len = strlen(path); int brace; char *p; if (path[0]) snprintf(&path[len], MAXPATHLEN - len, "/%s", anchorname); else snprintf(&path[len], MAXPATHLEN - len, "%s", anchorname); if (pfctl_get_eth_rules_info(dev, &info, path)) { warn("DIOCGETETHRULES"); return (-1); } for (int nr = 0; nr < info.nr; nr++) { brace = 0; INDENT(depth, !(opts & PF_OPT_VERBOSE)); if (pfctl_get_eth_rule(dev, nr, info.ticket, path, &rule, opts & PF_OPT_CLRRULECTRS, anchor_call) != 0) { warn("DIOCGETETHRULE"); return (-1); } if (anchor_call[0] && ((((p = strrchr(anchor_call, '_')) != NULL) && (p == anchor_call || *(--p) == '/')) || (opts & PF_OPT_RECURSE))) { brace++; if ((p = strrchr(anchor_call, '/')) != NULL) p++; else p = &anchor_call[0]; } else p = &anchor_call[0]; if (dotitle) { pfctl_print_title("ETH RULES:"); dotitle = 0; } print_eth_rule(&rule, anchor_call, opts & (PF_OPT_VERBOSE2 | PF_OPT_DEBUG)); if (brace) printf(" {\n"); else printf("\n"); pfctl_print_eth_rule_counters(&rule, opts); if (brace) { pfctl_show_eth_rules(dev, path, opts, format, p, depth + 1); INDENT(depth, !(opts & PF_OPT_VERBOSE)); printf("}\n"); } } path[len] = '\0'; return (0); } int pfctl_show_rules(int dev, char *path, int opts, enum pfctl_show format, char *anchorname, int depth) { struct pfctl_rules_info ri; struct pfctl_rule rule; char anchor_call[MAXPATHLEN]; u_int32_t nr, header = 0; int rule_numbers = opts & (PF_OPT_VERBOSE2 | PF_OPT_DEBUG); int numeric = opts & PF_OPT_NUMERIC; int len = strlen(path); int brace; int ret; char *p; if (path[0]) snprintf(&path[len], MAXPATHLEN - len, "/%s", anchorname); else snprintf(&path[len], MAXPATHLEN - len, "%s", anchorname); if (opts & PF_OPT_SHOWALL) { ret = pfctl_get_rules_info(dev, &ri, PF_PASS, path); if (ret != 0) { warn("DIOCGETRULES"); goto error; } header++; } ret = pfctl_get_rules_info(dev, &ri, PF_SCRUB, path); if (ret != 0) { warn("DIOCGETRULES"); goto error; } if (opts & PF_OPT_SHOWALL) { if (format == PFCTL_SHOW_RULES && (ri.nr > 0 || header)) pfctl_print_title("FILTER RULES:"); else if (format == PFCTL_SHOW_LABELS && labels) pfctl_print_title("LABEL COUNTERS:"); } for (nr = 0; nr < ri.nr; ++nr) { if (pfctl_get_clear_rule(dev, nr, ri.ticket, path, PF_SCRUB, &rule, anchor_call, opts & PF_OPT_CLRRULECTRS)) { warn("DIOCGETRULENV"); goto error; } if (pfctl_get_pool(dev, &rule.rpool, nr, ri.ticket, PF_SCRUB, path) != 0) goto error; switch (format) { case PFCTL_SHOW_LABELS: break; case PFCTL_SHOW_RULES: if (rule.label[0] && (opts & PF_OPT_SHOWALL)) labels = 1; print_rule(&rule, anchor_call, rule_numbers, numeric); printf("\n"); pfctl_print_rule_counters(&rule, opts); break; case PFCTL_SHOW_NOTHING: break; } pfctl_clear_pool(&rule.rpool); } ret = pfctl_get_rules_info(dev, &ri, PF_PASS, path); if (ret != 0) { warn("DIOCGETRULES"); goto error; } for (nr = 0; nr < ri.nr; ++nr) { if (pfctl_get_clear_rule(dev, nr, ri.ticket, path, PF_PASS, &rule, anchor_call, opts & PF_OPT_CLRRULECTRS)) { warn("DIOCGETRULE"); goto error; } if (pfctl_get_pool(dev, &rule.rpool, nr, ri.ticket, PF_PASS, path) != 0) goto error; switch (format) { case PFCTL_SHOW_LABELS: { bool show = false; int i = 0; while (rule.label[i][0]) { printf("%s ", rule.label[i++]); show = true; } if (show) { printf("%llu %llu %llu %llu" " %llu %llu %llu %ju\n", (unsigned long long)rule.evaluations, (unsigned long long)(rule.packets[0] + rule.packets[1]), (unsigned long long)(rule.bytes[0] + rule.bytes[1]), (unsigned long long)rule.packets[0], (unsigned long long)rule.bytes[0], (unsigned long long)rule.packets[1], (unsigned long long)rule.bytes[1], (uintmax_t)rule.states_tot); } break; } case PFCTL_SHOW_RULES: brace = 0; if (rule.label[0] && (opts & PF_OPT_SHOWALL)) labels = 1; INDENT(depth, !(opts & PF_OPT_VERBOSE)); if (anchor_call[0] && ((((p = strrchr(anchor_call, '_')) != NULL) && ((void *)p == (void *)anchor_call || *(--p) == '/')) || (opts & PF_OPT_RECURSE))) { brace++; int aclen = strlen(anchor_call); if (anchor_call[aclen - 1] == '*') anchor_call[aclen - 2] = '\0'; } p = &anchor_call[0]; print_rule(&rule, p, rule_numbers, numeric); if (brace) printf(" {\n"); else printf("\n"); pfctl_print_rule_counters(&rule, opts); if (brace) { pfctl_show_rules(dev, path, opts, format, p, depth + 1); INDENT(depth, !(opts & PF_OPT_VERBOSE)); printf("}\n"); } break; case PFCTL_SHOW_NOTHING: break; } pfctl_clear_pool(&rule.rpool); } path[len] = '\0'; return (0); error: path[len] = '\0'; return (-1); } int pfctl_show_nat(int dev, char *path, int opts, char *anchorname, int depth) { struct pfctl_rules_info ri; struct pfctl_rule rule; char anchor_call[MAXPATHLEN]; u_int32_t nr; static int nattype[3] = { PF_NAT, PF_RDR, PF_BINAT }; int i, dotitle = opts & PF_OPT_SHOWALL; int brace, ret; int len = strlen(path); char *p; if (path[0]) snprintf(&path[len], MAXPATHLEN - len, "/%s", anchorname); else snprintf(&path[len], MAXPATHLEN - len, "%s", anchorname); for (i = 0; i < 3; i++) { ret = pfctl_get_rules_info(dev, &ri, nattype[i], path); if (ret != 0) { warn("DIOCGETRULES"); return (-1); } for (nr = 0; nr < ri.nr; ++nr) { brace = 0; INDENT(depth, !(opts & PF_OPT_VERBOSE)); if (pfctl_get_rule(dev, nr, ri.ticket, path, nattype[i], &rule, anchor_call)) { warn("DIOCGETRULE"); return (-1); } if (pfctl_get_pool(dev, &rule.rpool, nr, ri.ticket, nattype[i], path) != 0) return (-1); if (anchor_call[0] && ((((p = strrchr(anchor_call, '_')) != NULL) && (p == anchor_call || *(--p) == '/')) || (opts & PF_OPT_RECURSE))) { brace++; if ((p = strrchr(anchor_call, '/')) != NULL) p++; else p = &anchor_call[0]; } else p = &anchor_call[0]; if (dotitle) { pfctl_print_title("TRANSLATION RULES:"); dotitle = 0; } print_rule(&rule, anchor_call, opts & PF_OPT_VERBOSE2, opts & PF_OPT_NUMERIC); if (brace) printf(" {\n"); else printf("\n"); pfctl_print_rule_counters(&rule, opts); pfctl_clear_pool(&rule.rpool); if (brace) { pfctl_show_nat(dev, path, opts, p, depth + 1); INDENT(depth, !(opts & PF_OPT_VERBOSE)); printf("}\n"); } } } return (0); } int pfctl_show_src_nodes(int dev, int opts) { struct pfioc_src_nodes psn; struct pf_src_node *p; char *inbuf = NULL, *newinbuf = NULL; unsigned int len = 0; int i; memset(&psn, 0, sizeof(psn)); for (;;) { psn.psn_len = len; if (len) { newinbuf = realloc(inbuf, len); if (newinbuf == NULL) err(1, "realloc"); psn.psn_buf = inbuf = newinbuf; } if (ioctl(dev, DIOCGETSRCNODES, &psn) < 0) { warn("DIOCGETSRCNODES"); free(inbuf); return (-1); } if (psn.psn_len + sizeof(struct pfioc_src_nodes) < len) break; if (len == 0 && psn.psn_len == 0) goto done; if (len == 0 && psn.psn_len != 0) len = psn.psn_len; if (psn.psn_len == 0) goto done; /* no src_nodes */ len *= 2; } p = psn.psn_src_nodes; if (psn.psn_len > 0 && (opts & PF_OPT_SHOWALL)) pfctl_print_title("SOURCE TRACKING NODES:"); for (i = 0; i < psn.psn_len; i += sizeof(*p)) { print_src_node(p, opts); p++; } done: free(inbuf); return (0); } int pfctl_show_states(int dev, const char *iface, int opts) { struct pfctl_states states; struct pfctl_state *s; int dotitle = (opts & PF_OPT_SHOWALL); memset(&states, 0, sizeof(states)); if (pfctl_get_states(dev, &states)) return (-1); TAILQ_FOREACH(s, &states.states, entry) { if (iface != NULL && strcmp(s->ifname, iface)) continue; if (dotitle) { pfctl_print_title("STATES:"); dotitle = 0; } print_state(s, opts); } pfctl_free_states(&states); return (0); } int pfctl_show_status(int dev, int opts) { struct pfctl_status *status; struct pfctl_syncookies cookies; if ((status = pfctl_get_status(dev)) == NULL) { warn("DIOCGETSTATUS"); return (-1); } if (pfctl_get_syncookies(dev, &cookies)) { pfctl_free_status(status); warn("DIOCGETSYNCOOKIES"); return (-1); } if (opts & PF_OPT_SHOWALL) pfctl_print_title("INFO:"); print_status(status, &cookies, opts); pfctl_free_status(status); return (0); } int pfctl_show_running(int dev) { struct pfctl_status *status; int running; if ((status = pfctl_get_status(dev)) == NULL) { warn("DIOCGETSTATUS"); return (-1); } running = status->running; print_running(status); pfctl_free_status(status); return (!running); } int pfctl_show_timeouts(int dev, int opts) { struct pfioc_tm pt; int i; if (opts & PF_OPT_SHOWALL) pfctl_print_title("TIMEOUTS:"); memset(&pt, 0, sizeof(pt)); for (i = 0; pf_timeouts[i].name; i++) { pt.timeout = pf_timeouts[i].timeout; if (ioctl(dev, DIOCGETTIMEOUT, &pt)) err(1, "DIOCGETTIMEOUT"); printf("%-20s %10d", pf_timeouts[i].name, pt.seconds); if (pf_timeouts[i].timeout >= PFTM_ADAPTIVE_START && pf_timeouts[i].timeout <= PFTM_ADAPTIVE_END) printf(" states"); else printf("s"); printf("\n"); } return (0); } int pfctl_show_limits(int dev, int opts) { struct pfioc_limit pl; int i; if (opts & PF_OPT_SHOWALL) pfctl_print_title("LIMITS:"); memset(&pl, 0, sizeof(pl)); for (i = 0; pf_limits[i].name; i++) { pl.index = pf_limits[i].index; if (ioctl(dev, DIOCGETLIMIT, &pl)) err(1, "DIOCGETLIMIT"); printf("%-13s ", pf_limits[i].name); if (pl.limit == UINT_MAX) printf("unlimited\n"); else printf("hard limit %8u\n", pl.limit); } return (0); } /* callbacks for rule/nat/rdr/addr */ int pfctl_add_pool(struct pfctl *pf, struct pfctl_pool *p, sa_family_t af) { struct pf_pooladdr *pa; if ((pf->opts & PF_OPT_NOACTION) == 0) { if (ioctl(pf->dev, DIOCBEGINADDRS, &pf->paddr)) err(1, "DIOCBEGINADDRS"); } pf->paddr.af = af; TAILQ_FOREACH(pa, &p->list, entries) { memcpy(&pf->paddr.addr, pa, sizeof(struct pf_pooladdr)); if ((pf->opts & PF_OPT_NOACTION) == 0) { if (ioctl(pf->dev, DIOCADDADDR, &pf->paddr)) err(1, "DIOCADDADDR"); } } return (0); } int pfctl_append_rule(struct pfctl *pf, struct pfctl_rule *r, const char *anchor_call) { u_int8_t rs_num; struct pfctl_rule *rule; struct pfctl_ruleset *rs; char *p; rs_num = pf_get_ruleset_number(r->action); if (rs_num == PF_RULESET_MAX) errx(1, "Invalid rule type %d", r->action); rs = &pf->anchor->ruleset; if (anchor_call[0] && r->anchor == NULL) { /* * Don't make non-brace anchors part of the main anchor pool. */ if ((r->anchor = calloc(1, sizeof(*r->anchor))) == NULL) err(1, "pfctl_append_rule: calloc"); pf_init_ruleset(&r->anchor->ruleset); r->anchor->ruleset.anchor = r->anchor; if (strlcpy(r->anchor->path, anchor_call, sizeof(rule->anchor->path)) >= sizeof(rule->anchor->path)) errx(1, "pfctl_append_rule: strlcpy"); if ((p = strrchr(anchor_call, '/')) != NULL) { if (!strlen(p)) err(1, "pfctl_append_rule: bad anchor name %s", anchor_call); } else p = (char *)anchor_call; if (strlcpy(r->anchor->name, p, sizeof(rule->anchor->name)) >= sizeof(rule->anchor->name)) errx(1, "pfctl_append_rule: strlcpy"); } if ((rule = calloc(1, sizeof(*rule))) == NULL) err(1, "calloc"); bcopy(r, rule, sizeof(*rule)); TAILQ_INIT(&rule->rpool.list); pfctl_move_pool(&r->rpool, &rule->rpool); TAILQ_INSERT_TAIL(rs->rules[rs_num].active.ptr, rule, entries); return (0); } int pfctl_append_eth_rule(struct pfctl *pf, struct pfctl_eth_rule *r, const char *anchor_call) { struct pfctl_eth_rule *rule; struct pfctl_eth_ruleset *rs; char *p; rs = &pf->eanchor->ruleset; if (anchor_call[0] && r->anchor == NULL) { /* * Don't make non-brace anchors part of the main anchor pool. */ if ((r->anchor = calloc(1, sizeof(*r->anchor))) == NULL) err(1, "pfctl_append_rule: calloc"); pf_init_eth_ruleset(&r->anchor->ruleset); r->anchor->ruleset.anchor = r->anchor; if (strlcpy(r->anchor->path, anchor_call, sizeof(rule->anchor->path)) >= sizeof(rule->anchor->path)) errx(1, "pfctl_append_rule: strlcpy"); if ((p = strrchr(anchor_call, '/')) != NULL) { if (!strlen(p)) err(1, "pfctl_append_eth_rule: bad anchor name %s", anchor_call); } else p = (char *)anchor_call; if (strlcpy(r->anchor->name, p, sizeof(rule->anchor->name)) >= sizeof(rule->anchor->name)) errx(1, "pfctl_append_eth_rule: strlcpy"); } if ((rule = calloc(1, sizeof(*rule))) == NULL) err(1, "calloc"); bcopy(r, rule, sizeof(*rule)); TAILQ_INSERT_TAIL(&rs->rules, rule, entries); return (0); } int pfctl_eth_ruleset_trans(struct pfctl *pf, char *path, struct pfctl_eth_anchor *a) { int osize = pf->trans->pfrb_size; if ((pf->loadopt & PFCTL_FLAG_ETH) != 0) { if (pfctl_add_trans(pf->trans, PF_RULESET_ETH, path)) return (1); } if (pfctl_trans(pf->dev, pf->trans, DIOCXBEGIN, osize)) return (5); return (0); } int pfctl_ruleset_trans(struct pfctl *pf, char *path, struct pfctl_anchor *a, bool do_eth) { int osize = pf->trans->pfrb_size; if ((pf->loadopt & PFCTL_FLAG_ETH) != 0 && do_eth) { if (pfctl_add_trans(pf->trans, PF_RULESET_ETH, path)) return (1); } if ((pf->loadopt & PFCTL_FLAG_NAT) != 0) { if (pfctl_add_trans(pf->trans, PF_RULESET_NAT, path) || pfctl_add_trans(pf->trans, PF_RULESET_BINAT, path) || pfctl_add_trans(pf->trans, PF_RULESET_RDR, path)) return (1); } if (a == pf->astack[0] && ((altqsupport && (pf->loadopt & PFCTL_FLAG_ALTQ) != 0))) { if (pfctl_add_trans(pf->trans, PF_RULESET_ALTQ, path)) return (2); } if ((pf->loadopt & PFCTL_FLAG_FILTER) != 0) { if (pfctl_add_trans(pf->trans, PF_RULESET_SCRUB, path) || pfctl_add_trans(pf->trans, PF_RULESET_FILTER, path)) return (3); } if (pf->loadopt & PFCTL_FLAG_TABLE) if (pfctl_add_trans(pf->trans, PF_RULESET_TABLE, path)) return (4); if (pfctl_trans(pf->dev, pf->trans, DIOCXBEGIN, osize)) return (5); return (0); } int pfctl_load_eth_ruleset(struct pfctl *pf, char *path, struct pfctl_eth_ruleset *rs, int depth) { struct pfctl_eth_rule *r; int error, len = strlen(path); int brace = 0; pf->eanchor = rs->anchor; if (path[0]) snprintf(&path[len], MAXPATHLEN - len, "/%s", pf->eanchor->name); else snprintf(&path[len], MAXPATHLEN - len, "%s", pf->eanchor->name); if (depth) { if (TAILQ_FIRST(&rs->rules) != NULL) { brace++; if (pf->opts & PF_OPT_VERBOSE) printf(" {\n"); if ((pf->opts & PF_OPT_NOACTION) == 0 && (error = pfctl_eth_ruleset_trans(pf, path, rs->anchor))) { printf("pfctl_load_eth_rulesets: " "pfctl_eth_ruleset_trans %d\n", error); goto error; } } else if (pf->opts & PF_OPT_VERBOSE) printf("\n"); } while ((r = TAILQ_FIRST(&rs->rules)) != NULL) { TAILQ_REMOVE(&rs->rules, r, entries); error = pfctl_load_eth_rule(pf, path, r, depth); if (error) return (error); if (r->anchor) { if ((error = pfctl_load_eth_ruleset(pf, path, &r->anchor->ruleset, depth + 1))) return (error); } else if (pf->opts & PF_OPT_VERBOSE) printf("\n"); free(r); } if (brace && pf->opts & PF_OPT_VERBOSE) { INDENT(depth - 1, (pf->opts & PF_OPT_VERBOSE)); printf("}\n"); } path[len] = '\0'; return (0); error: path[len] = '\0'; return (error); } int pfctl_load_eth_rule(struct pfctl *pf, char *path, struct pfctl_eth_rule *r, int depth) { char *name; char anchor[PF_ANCHOR_NAME_SIZE]; int len = strlen(path); if (strlcpy(anchor, path, sizeof(anchor)) >= sizeof(anchor)) errx(1, "pfctl_load_eth_rule: strlcpy"); if (r->anchor) { if (r->anchor->match) { if (path[0]) snprintf(&path[len], MAXPATHLEN - len, "/%s", r->anchor->name); else snprintf(&path[len], MAXPATHLEN - len, "%s", r->anchor->name); name = r->anchor->name; } else name = r->anchor->path; } else name = ""; if ((pf->opts & PF_OPT_NOACTION) == 0) if (pfctl_add_eth_rule(pf->dev, r, anchor, name, pf->eth_ticket)) err(1, "DIOCADDETHRULENV"); if (pf->opts & PF_OPT_VERBOSE) { INDENT(depth, !(pf->opts & PF_OPT_VERBOSE2)); print_eth_rule(r, r->anchor ? r->anchor->name : "", pf->opts & (PF_OPT_VERBOSE2 | PF_OPT_DEBUG)); } path[len] = '\0'; return (0); } int pfctl_load_ruleset(struct pfctl *pf, char *path, struct pfctl_ruleset *rs, int rs_num, int depth) { struct pfctl_rule *r; int error, len = strlen(path); int brace = 0; pf->anchor = rs->anchor; if (path[0]) snprintf(&path[len], MAXPATHLEN - len, "/%s", pf->anchor->name); else snprintf(&path[len], MAXPATHLEN - len, "%s", pf->anchor->name); if (depth) { if (TAILQ_FIRST(rs->rules[rs_num].active.ptr) != NULL) { brace++; if (pf->opts & PF_OPT_VERBOSE) printf(" {\n"); if ((pf->opts & PF_OPT_NOACTION) == 0 && (error = pfctl_ruleset_trans(pf, path, rs->anchor, false))) { printf("pfctl_load_rulesets: " "pfctl_ruleset_trans %d\n", error); goto error; } } else if (pf->opts & PF_OPT_VERBOSE) printf("\n"); } if (pf->optimize && rs_num == PF_RULESET_FILTER) pfctl_optimize_ruleset(pf, rs); while ((r = TAILQ_FIRST(rs->rules[rs_num].active.ptr)) != NULL) { TAILQ_REMOVE(rs->rules[rs_num].active.ptr, r, entries); for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) expand_label(r->label[i], PF_RULE_LABEL_SIZE, r); expand_label(r->tagname, PF_TAG_NAME_SIZE, r); expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r); if ((error = pfctl_load_rule(pf, path, r, depth))) goto error; if (r->anchor) { if ((error = pfctl_load_ruleset(pf, path, &r->anchor->ruleset, rs_num, depth + 1))) goto error; } else if (pf->opts & PF_OPT_VERBOSE) printf("\n"); free(r); } if (brace && pf->opts & PF_OPT_VERBOSE) { INDENT(depth - 1, (pf->opts & PF_OPT_VERBOSE)); printf("}\n"); } path[len] = '\0'; return (0); error: path[len] = '\0'; return (error); } int pfctl_load_rule(struct pfctl *pf, char *path, struct pfctl_rule *r, int depth) { u_int8_t rs_num = pf_get_ruleset_number(r->action); char *name; u_int32_t ticket; char anchor[PF_ANCHOR_NAME_SIZE]; int len = strlen(path); int error; bool was_present; /* set up anchor before adding to path for anchor_call */ if ((pf->opts & PF_OPT_NOACTION) == 0) ticket = pfctl_get_ticket(pf->trans, rs_num, path); if (strlcpy(anchor, path, sizeof(anchor)) >= sizeof(anchor)) errx(1, "pfctl_load_rule: strlcpy"); if (r->anchor) { if (r->anchor->match) { if (path[0]) snprintf(&path[len], MAXPATHLEN - len, "/%s", r->anchor->name); else snprintf(&path[len], MAXPATHLEN - len, "%s", r->anchor->name); name = r->anchor->name; } else name = r->anchor->path; } else name = ""; was_present = false; if ((pf->opts & PF_OPT_NOACTION) == 0) { if (pfctl_add_pool(pf, &r->rpool, r->af)) return (1); error = pfctl_add_rule(pf->dev, r, anchor, name, ticket, pf->paddr.ticket); switch (error) { case 0: /* things worked, do nothing */ break; case EEXIST: /* an identical rule is already present */ was_present = true; break; default: err(1, "DIOCADDRULENV"); } } if (pf->opts & PF_OPT_VERBOSE) { INDENT(depth, !(pf->opts & PF_OPT_VERBOSE2)); print_rule(r, r->anchor ? r->anchor->name : "", pf->opts & PF_OPT_VERBOSE2, pf->opts & PF_OPT_NUMERIC); if (was_present) printf(" -- rule was already present"); } path[len] = '\0'; pfctl_clear_pool(&r->rpool); return (0); } int pfctl_add_altq(struct pfctl *pf, struct pf_altq *a) { if (altqsupport && (loadopt & PFCTL_FLAG_ALTQ) != 0) { memcpy(&pf->paltq->altq, a, sizeof(struct pf_altq)); if ((pf->opts & PF_OPT_NOACTION) == 0) { if (ioctl(pf->dev, DIOCADDALTQ, pf->paltq)) { if (errno == ENXIO) errx(1, "qtype not configured"); else if (errno == ENODEV) errx(1, "%s: driver does not support " "altq", a->ifname); else err(1, "DIOCADDALTQ"); } } pfaltq_store(&pf->paltq->altq); } return (0); } int pfctl_rules(int dev, char *filename, int opts, int optimize, char *anchorname, struct pfr_buffer *trans) { #define ERR(x) do { warn(x); goto _error; } while(0) #define ERRX(x) do { warnx(x); goto _error; } while(0) struct pfr_buffer *t, buf; struct pfioc_altq pa; struct pfctl pf; struct pfctl_ruleset *rs; struct pfctl_eth_ruleset *ethrs; struct pfr_table trs; char *path; int osize; RB_INIT(&pf_anchors); memset(&pf_main_anchor, 0, sizeof(pf_main_anchor)); pf_init_ruleset(&pf_main_anchor.ruleset); pf_main_anchor.ruleset.anchor = &pf_main_anchor; memset(&pf_eth_main_anchor, 0, sizeof(pf_eth_main_anchor)); pf_init_eth_ruleset(&pf_eth_main_anchor.ruleset); pf_eth_main_anchor.ruleset.anchor = &pf_eth_main_anchor; if (trans == NULL) { bzero(&buf, sizeof(buf)); buf.pfrb_type = PFRB_TRANS; t = &buf; osize = 0; } else { t = trans; osize = t->pfrb_size; } memset(&pa, 0, sizeof(pa)); pa.version = PFIOC_ALTQ_VERSION; memset(&pf, 0, sizeof(pf)); memset(&trs, 0, sizeof(trs)); if ((path = calloc(1, MAXPATHLEN)) == NULL) ERRX("pfctl_rules: calloc"); if (strlcpy(trs.pfrt_anchor, anchorname, sizeof(trs.pfrt_anchor)) >= sizeof(trs.pfrt_anchor)) ERRX("pfctl_rules: strlcpy"); pf.dev = dev; pf.opts = opts; pf.optimize = optimize; pf.loadopt = loadopt; /* non-brace anchor, create without resolving the path */ if ((pf.anchor = calloc(1, sizeof(*pf.anchor))) == NULL) ERRX("pfctl_rules: calloc"); rs = &pf.anchor->ruleset; pf_init_ruleset(rs); rs->anchor = pf.anchor; if (strlcpy(pf.anchor->path, anchorname, sizeof(pf.anchor->path)) >= sizeof(pf.anchor->path)) errx(1, "pfctl_rules: strlcpy"); if (strlcpy(pf.anchor->name, anchorname, sizeof(pf.anchor->name)) >= sizeof(pf.anchor->name)) errx(1, "pfctl_rules: strlcpy"); pf.astack[0] = pf.anchor; pf.asd = 0; if (anchorname[0]) pf.loadopt &= ~PFCTL_FLAG_ALTQ; pf.paltq = &pa; pf.trans = t; pfctl_init_options(&pf); /* Set up ethernet anchor */ if ((pf.eanchor = calloc(1, sizeof(*pf.eanchor))) == NULL) ERRX("pfctl_rules: calloc"); if (strlcpy(pf.eanchor->path, anchorname, sizeof(pf.eanchor->path)) >= sizeof(pf.eanchor->path)) errx(1, "pfctl_rules: strlcpy"); if (strlcpy(pf.eanchor->name, anchorname, sizeof(pf.eanchor->name)) >= sizeof(pf.eanchor->name)) errx(1, "pfctl_rules: strlcpy"); ethrs = &pf.eanchor->ruleset; pf_init_eth_ruleset(ethrs); ethrs->anchor = pf.eanchor; pf.eastack[0] = pf.eanchor; if ((opts & PF_OPT_NOACTION) == 0) { /* * XXX For the time being we need to open transactions for * the main ruleset before parsing, because tables are still * loaded at parse time. */ if (pfctl_ruleset_trans(&pf, anchorname, pf.anchor, true)) ERRX("pfctl_rules"); if (pf.loadopt & PFCTL_FLAG_ETH) pf.eth_ticket = pfctl_get_ticket(t, PF_RULESET_ETH, anchorname); if (altqsupport && (pf.loadopt & PFCTL_FLAG_ALTQ)) pa.ticket = pfctl_get_ticket(t, PF_RULESET_ALTQ, anchorname); if (pf.loadopt & PFCTL_FLAG_TABLE) pf.astack[0]->ruleset.tticket = pfctl_get_ticket(t, PF_RULESET_TABLE, anchorname); } if (parse_config(filename, &pf) < 0) { if ((opts & PF_OPT_NOACTION) == 0) ERRX("Syntax error in config file: " "pf rules not loaded"); else goto _error; } if (loadopt & PFCTL_FLAG_OPTION) pfctl_adjust_skip_ifaces(&pf); if ((pf.loadopt & PFCTL_FLAG_FILTER && (pfctl_load_ruleset(&pf, path, rs, PF_RULESET_SCRUB, 0))) || (pf.loadopt & PFCTL_FLAG_ETH && (pfctl_load_eth_ruleset(&pf, path, ethrs, 0))) || (pf.loadopt & PFCTL_FLAG_NAT && (pfctl_load_ruleset(&pf, path, rs, PF_RULESET_NAT, 0) || pfctl_load_ruleset(&pf, path, rs, PF_RULESET_RDR, 0) || pfctl_load_ruleset(&pf, path, rs, PF_RULESET_BINAT, 0))) || (pf.loadopt & PFCTL_FLAG_FILTER && pfctl_load_ruleset(&pf, path, rs, PF_RULESET_FILTER, 0))) { if ((opts & PF_OPT_NOACTION) == 0) ERRX("Unable to load rules into kernel"); else goto _error; } if ((altqsupport && (pf.loadopt & PFCTL_FLAG_ALTQ) != 0)) if (check_commit_altq(dev, opts) != 0) ERRX("errors in altq config"); /* process "load anchor" directives */ if (!anchorname[0]) if (pfctl_load_anchors(dev, &pf, t) == -1) ERRX("load anchors"); if (trans == NULL && (opts & PF_OPT_NOACTION) == 0) { if (!anchorname[0]) if (pfctl_load_options(&pf)) goto _error; if (pfctl_trans(dev, t, DIOCXCOMMIT, osize)) ERR("DIOCXCOMMIT"); } free(path); return (0); _error: if (trans == NULL) { /* main ruleset */ if ((opts & PF_OPT_NOACTION) == 0) if (pfctl_trans(dev, t, DIOCXROLLBACK, osize)) err(1, "DIOCXROLLBACK"); exit(1); } else { /* sub ruleset */ free(path); return (-1); } #undef ERR #undef ERRX } FILE * pfctl_fopen(const char *name, const char *mode) { struct stat st; FILE *fp; fp = fopen(name, mode); if (fp == NULL) return (NULL); if (fstat(fileno(fp), &st)) { fclose(fp); return (NULL); } if (S_ISDIR(st.st_mode)) { fclose(fp); errno = EISDIR; return (NULL); } return (fp); } void pfctl_init_options(struct pfctl *pf) { pf->timeout[PFTM_TCP_FIRST_PACKET] = PFTM_TCP_FIRST_PACKET_VAL; pf->timeout[PFTM_TCP_OPENING] = PFTM_TCP_OPENING_VAL; pf->timeout[PFTM_TCP_ESTABLISHED] = PFTM_TCP_ESTABLISHED_VAL; pf->timeout[PFTM_TCP_CLOSING] = PFTM_TCP_CLOSING_VAL; pf->timeout[PFTM_TCP_FIN_WAIT] = PFTM_TCP_FIN_WAIT_VAL; pf->timeout[PFTM_TCP_CLOSED] = PFTM_TCP_CLOSED_VAL; pf->timeout[PFTM_UDP_FIRST_PACKET] = PFTM_UDP_FIRST_PACKET_VAL; pf->timeout[PFTM_UDP_SINGLE] = PFTM_UDP_SINGLE_VAL; pf->timeout[PFTM_UDP_MULTIPLE] = PFTM_UDP_MULTIPLE_VAL; pf->timeout[PFTM_ICMP_FIRST_PACKET] = PFTM_ICMP_FIRST_PACKET_VAL; pf->timeout[PFTM_ICMP_ERROR_REPLY] = PFTM_ICMP_ERROR_REPLY_VAL; pf->timeout[PFTM_OTHER_FIRST_PACKET] = PFTM_OTHER_FIRST_PACKET_VAL; pf->timeout[PFTM_OTHER_SINGLE] = PFTM_OTHER_SINGLE_VAL; pf->timeout[PFTM_OTHER_MULTIPLE] = PFTM_OTHER_MULTIPLE_VAL; pf->timeout[PFTM_FRAG] = PFTM_FRAG_VAL; pf->timeout[PFTM_INTERVAL] = PFTM_INTERVAL_VAL; pf->timeout[PFTM_SRC_NODE] = PFTM_SRC_NODE_VAL; pf->timeout[PFTM_TS_DIFF] = PFTM_TS_DIFF_VAL; pf->timeout[PFTM_ADAPTIVE_START] = PFSTATE_ADAPT_START; pf->timeout[PFTM_ADAPTIVE_END] = PFSTATE_ADAPT_END; pf->limit[PF_LIMIT_STATES] = PFSTATE_HIWAT; pf->limit[PF_LIMIT_FRAGS] = PFFRAG_FRENT_HIWAT; pf->limit[PF_LIMIT_SRC_NODES] = PFSNODE_HIWAT; pf->limit[PF_LIMIT_TABLE_ENTRIES] = PFR_KENTRY_HIWAT; pf->debug = PF_DEBUG_URGENT; pf->syncookies = false; pf->syncookieswat[0] = PF_SYNCOOKIES_LOWATPCT; pf->syncookieswat[1] = PF_SYNCOOKIES_HIWATPCT; } int pfctl_load_options(struct pfctl *pf) { int i, error = 0; if ((loadopt & PFCTL_FLAG_OPTION) == 0) return (0); /* load limits */ for (i = 0; i < PF_LIMIT_MAX; i++) { if ((pf->opts & PF_OPT_MERGE) && !pf->limit_set[i]) continue; if (pfctl_load_limit(pf, i, pf->limit[i])) error = 1; } /* * If we've set the limit, but haven't explicitly set adaptive * timeouts, do it now with a start of 60% and end of 120%. */ if (pf->limit_set[PF_LIMIT_STATES] && !pf->timeout_set[PFTM_ADAPTIVE_START] && !pf->timeout_set[PFTM_ADAPTIVE_END]) { pf->timeout[PFTM_ADAPTIVE_START] = (pf->limit[PF_LIMIT_STATES] / 10) * 6; pf->timeout_set[PFTM_ADAPTIVE_START] = 1; pf->timeout[PFTM_ADAPTIVE_END] = (pf->limit[PF_LIMIT_STATES] / 10) * 12; pf->timeout_set[PFTM_ADAPTIVE_END] = 1; } /* load timeouts */ for (i = 0; i < PFTM_MAX; i++) { if ((pf->opts & PF_OPT_MERGE) && !pf->timeout_set[i]) continue; if (pfctl_load_timeout(pf, i, pf->timeout[i])) error = 1; } /* load debug */ if (!(pf->opts & PF_OPT_MERGE) || pf->debug_set) if (pfctl_load_debug(pf, pf->debug)) error = 1; /* load logif */ if (!(pf->opts & PF_OPT_MERGE) || pf->ifname_set) if (pfctl_load_logif(pf, pf->ifname)) error = 1; /* load hostid */ if (!(pf->opts & PF_OPT_MERGE) || pf->hostid_set) if (pfctl_load_hostid(pf, pf->hostid)) error = 1; /* load keepcounters */ if (pfctl_set_keepcounters(pf->dev, pf->keep_counters)) error = 1; /* load syncookies settings */ if (pfctl_load_syncookies(pf, pf->syncookies)) error = 1; return (error); } int pfctl_set_limit(struct pfctl *pf, const char *opt, unsigned int limit) { int i; for (i = 0; pf_limits[i].name; i++) { if (strcasecmp(opt, pf_limits[i].name) == 0) { pf->limit[pf_limits[i].index] = limit; pf->limit_set[pf_limits[i].index] = 1; break; } } if (pf_limits[i].name == NULL) { warnx("Bad pool name."); return (1); } if (pf->opts & PF_OPT_VERBOSE) printf("set limit %s %d\n", opt, limit); return (0); } int pfctl_load_limit(struct pfctl *pf, unsigned int index, unsigned int limit) { struct pfioc_limit pl; memset(&pl, 0, sizeof(pl)); pl.index = index; pl.limit = limit; if (ioctl(pf->dev, DIOCSETLIMIT, &pl)) { if (errno == EBUSY) warnx("Current pool size exceeds requested hard limit"); else warnx("DIOCSETLIMIT"); return (1); } return (0); } int pfctl_set_timeout(struct pfctl *pf, const char *opt, int seconds, int quiet) { int i; if ((loadopt & PFCTL_FLAG_OPTION) == 0) return (0); for (i = 0; pf_timeouts[i].name; i++) { if (strcasecmp(opt, pf_timeouts[i].name) == 0) { pf->timeout[pf_timeouts[i].timeout] = seconds; pf->timeout_set[pf_timeouts[i].timeout] = 1; break; } } if (pf_timeouts[i].name == NULL) { warnx("Bad timeout name."); return (1); } if (pf->opts & PF_OPT_VERBOSE && ! quiet) printf("set timeout %s %d\n", opt, seconds); return (0); } int pfctl_load_timeout(struct pfctl *pf, unsigned int timeout, unsigned int seconds) { struct pfioc_tm pt; memset(&pt, 0, sizeof(pt)); pt.timeout = timeout; pt.seconds = seconds; if (ioctl(pf->dev, DIOCSETTIMEOUT, &pt)) { warnx("DIOCSETTIMEOUT"); return (1); } return (0); } int pfctl_set_optimization(struct pfctl *pf, const char *opt) { const struct pf_hint *hint; int i, r; if ((loadopt & PFCTL_FLAG_OPTION) == 0) return (0); for (i = 0; pf_hints[i].name; i++) if (strcasecmp(opt, pf_hints[i].name) == 0) break; hint = pf_hints[i].hint; if (hint == NULL) { warnx("invalid state timeouts optimization"); return (1); } for (i = 0; hint[i].name; i++) if ((r = pfctl_set_timeout(pf, hint[i].name, hint[i].timeout, 1))) return (r); if (pf->opts & PF_OPT_VERBOSE) printf("set optimization %s\n", opt); return (0); } int pfctl_set_logif(struct pfctl *pf, char *ifname) { if ((loadopt & PFCTL_FLAG_OPTION) == 0) return (0); if (!strcmp(ifname, "none")) { free(pf->ifname); pf->ifname = NULL; } else { pf->ifname = strdup(ifname); if (!pf->ifname) errx(1, "pfctl_set_logif: strdup"); } pf->ifname_set = 1; if (pf->opts & PF_OPT_VERBOSE) printf("set loginterface %s\n", ifname); return (0); } int pfctl_load_logif(struct pfctl *pf, char *ifname) { struct pfioc_if pi; memset(&pi, 0, sizeof(pi)); if (ifname && strlcpy(pi.ifname, ifname, sizeof(pi.ifname)) >= sizeof(pi.ifname)) { warnx("pfctl_load_logif: strlcpy"); return (1); } if (ioctl(pf->dev, DIOCSETSTATUSIF, &pi)) { warnx("DIOCSETSTATUSIF"); return (1); } return (0); } int pfctl_set_hostid(struct pfctl *pf, u_int32_t hostid) { if ((loadopt & PFCTL_FLAG_OPTION) == 0) return (0); HTONL(hostid); pf->hostid = hostid; pf->hostid_set = 1; if (pf->opts & PF_OPT_VERBOSE) printf("set hostid 0x%08x\n", ntohl(hostid)); return (0); } int pfctl_load_hostid(struct pfctl *pf, u_int32_t hostid) { if (ioctl(dev, DIOCSETHOSTID, &hostid)) { warnx("DIOCSETHOSTID"); return (1); } return (0); } int pfctl_load_syncookies(struct pfctl *pf, u_int8_t val) { struct pfctl_syncookies cookies; bzero(&cookies, sizeof(cookies)); cookies.mode = val; cookies.lowwater = pf->syncookieswat[0]; cookies.highwater = pf->syncookieswat[1]; if (pfctl_set_syncookies(dev, &cookies)) { warnx("DIOCSETSYNCOOKIES"); return (1); } return (0); } int pfctl_cfg_syncookies(struct pfctl *pf, uint8_t val, struct pfctl_watermarks *w) { if (val != PF_SYNCOOKIES_ADAPTIVE && w != NULL) { warnx("syncookies start/end only apply to adaptive"); return (1); } if (val == PF_SYNCOOKIES_ADAPTIVE && w != NULL) { if (!w->hi) w->hi = PF_SYNCOOKIES_HIWATPCT; if (!w->lo) w->lo = w->hi / 2; if (w->lo >= w->hi) { warnx("start must be higher than end"); return (1); } pf->syncookieswat[0] = w->lo; pf->syncookieswat[1] = w->hi; pf->syncookieswat_set = 1; } if (pf->opts & PF_OPT_VERBOSE) { if (val == PF_SYNCOOKIES_NEVER) printf("set syncookies never\n"); else if (val == PF_SYNCOOKIES_ALWAYS) printf("set syncookies always\n"); else if (val == PF_SYNCOOKIES_ADAPTIVE) { if (pf->syncookieswat_set) printf("set syncookies adaptive (start %u%%, " "end %u%%)\n", pf->syncookieswat[1], pf->syncookieswat[0]); else printf("set syncookies adaptive\n"); } else { /* cannot happen */ warnx("king bula ate all syncookies"); return (1); } } pf->syncookies = val; return (0); } int pfctl_set_debug(struct pfctl *pf, char *d) { u_int32_t level; if ((loadopt & PFCTL_FLAG_OPTION) == 0) return (0); if (!strcmp(d, "none")) pf->debug = PF_DEBUG_NONE; else if (!strcmp(d, "urgent")) pf->debug = PF_DEBUG_URGENT; else if (!strcmp(d, "misc")) pf->debug = PF_DEBUG_MISC; else if (!strcmp(d, "loud")) pf->debug = PF_DEBUG_NOISY; else { warnx("unknown debug level \"%s\"", d); return (-1); } pf->debug_set = 1; level = pf->debug; if ((pf->opts & PF_OPT_NOACTION) == 0) if (ioctl(dev, DIOCSETDEBUG, &level)) err(1, "DIOCSETDEBUG"); if (pf->opts & PF_OPT_VERBOSE) printf("set debug %s\n", d); return (0); } int pfctl_load_debug(struct pfctl *pf, unsigned int level) { if (ioctl(pf->dev, DIOCSETDEBUG, &level)) { warnx("DIOCSETDEBUG"); return (1); } return (0); } int pfctl_set_interface_flags(struct pfctl *pf, char *ifname, int flags, int how) { struct pfioc_iface pi; struct node_host *h = NULL, *n = NULL; if ((loadopt & PFCTL_FLAG_OPTION) == 0) return (0); bzero(&pi, sizeof(pi)); pi.pfiio_flags = flags; /* Make sure our cache matches the kernel. If we set or clear the flag * for a group this applies to all members. */ h = ifa_grouplookup(ifname, 0); for (n = h; n != NULL; n = n->next) pfctl_set_interface_flags(pf, n->ifname, flags, how); if (strlcpy(pi.pfiio_name, ifname, sizeof(pi.pfiio_name)) >= sizeof(pi.pfiio_name)) errx(1, "pfctl_set_interface_flags: strlcpy"); if ((pf->opts & PF_OPT_NOACTION) == 0) { if (how == 0) { if (ioctl(pf->dev, DIOCCLRIFFLAG, &pi)) err(1, "DIOCCLRIFFLAG"); } else { if (ioctl(pf->dev, DIOCSETIFFLAG, &pi)) err(1, "DIOCSETIFFLAG"); pfctl_check_skip_ifaces(ifname); } } return (0); } void pfctl_debug(int dev, u_int32_t level, int opts) { if (ioctl(dev, DIOCSETDEBUG, &level)) err(1, "DIOCSETDEBUG"); if ((opts & PF_OPT_QUIET) == 0) { fprintf(stderr, "debug level set to '"); switch (level) { case PF_DEBUG_NONE: fprintf(stderr, "none"); break; case PF_DEBUG_URGENT: fprintf(stderr, "urgent"); break; case PF_DEBUG_MISC: fprintf(stderr, "misc"); break; case PF_DEBUG_NOISY: fprintf(stderr, "loud"); break; default: fprintf(stderr, ""); break; } fprintf(stderr, "'\n"); } } int pfctl_test_altqsupport(int dev, int opts) { struct pfioc_altq pa; pa.version = PFIOC_ALTQ_VERSION; if (ioctl(dev, DIOCGETALTQS, &pa)) { if (errno == ENODEV) { if (opts & PF_OPT_VERBOSE) fprintf(stderr, "No ALTQ support in kernel\n" "ALTQ related functions disabled\n"); return (0); } else err(1, "DIOCGETALTQS"); } return (1); } int pfctl_show_anchors(int dev, int opts, char *anchorname) { struct pfioc_ruleset pr; u_int32_t mnr, nr; memset(&pr, 0, sizeof(pr)); memcpy(pr.path, anchorname, sizeof(pr.path)); if (ioctl(dev, DIOCGETRULESETS, &pr)) { if (errno == EINVAL) fprintf(stderr, "Anchor '%s' not found.\n", anchorname); else err(1, "DIOCGETRULESETS"); return (-1); } mnr = pr.nr; for (nr = 0; nr < mnr; ++nr) { char sub[MAXPATHLEN]; pr.nr = nr; if (ioctl(dev, DIOCGETRULESET, &pr)) err(1, "DIOCGETRULESET"); if (!strcmp(pr.name, PF_RESERVED_ANCHOR)) continue; sub[0] = 0; if (pr.path[0]) { strlcat(sub, pr.path, sizeof(sub)); strlcat(sub, "/", sizeof(sub)); } strlcat(sub, pr.name, sizeof(sub)); if (sub[0] != '_' || (opts & PF_OPT_VERBOSE)) printf(" %s\n", sub); if ((opts & PF_OPT_VERBOSE) && pfctl_show_anchors(dev, opts, sub)) return (-1); } return (0); } int pfctl_show_eth_anchors(int dev, int opts, char *anchorname) { struct pfctl_eth_rulesets_info ri; struct pfctl_eth_ruleset_info rs; int ret; if ((ret = pfctl_get_eth_rulesets_info(dev, &ri, anchorname)) != 0) { if (ret == ENOENT) fprintf(stderr, "Anchor '%s' not found.\n", anchorname); else err(1, "DIOCGETETHRULESETS"); return (-1); } for (int nr = 0; nr < ri.nr; nr++) { char sub[MAXPATHLEN]; if (pfctl_get_eth_ruleset(dev, anchorname, nr, &rs) != 0) err(1, "DIOCGETETHRULESET"); if (!strcmp(rs.name, PF_RESERVED_ANCHOR)) continue; sub[0] = 0; if (rs.path[0]) { strlcat(sub, rs.path, sizeof(sub)); strlcat(sub, "/", sizeof(sub)); } strlcat(sub, rs.name, sizeof(sub)); if (sub[0] != '_' || (opts & PF_OPT_VERBOSE)) printf(" %s\n", sub); if ((opts & PF_OPT_VERBOSE) && pfctl_show_eth_anchors(dev, opts, sub)) return (-1); } return (0); } const char * pfctl_lookup_option(char *cmd, const char * const *list) { if (cmd != NULL && *cmd) for (; *list; list++) if (!strncmp(cmd, *list, strlen(cmd))) return (*list); return (NULL); } int main(int argc, char *argv[]) { int error = 0; int ch; int mode = O_RDONLY; int opts = 0; int optimize = PF_OPTIMIZE_BASIC; char anchorname[MAXPATHLEN]; char *path; if (argc < 2) usage(); while ((ch = getopt(argc, argv, "a:AdD:eqf:F:ghi:k:K:mMnNOo:Pp:rRs:t:T:vx:z")) != -1) { switch (ch) { case 'a': anchoropt = optarg; break; case 'd': opts |= PF_OPT_DISABLE; mode = O_RDWR; break; case 'D': if (pfctl_cmdline_symset(optarg) < 0) warnx("could not parse macro definition %s", optarg); break; case 'e': opts |= PF_OPT_ENABLE; mode = O_RDWR; break; case 'q': opts |= PF_OPT_QUIET; break; case 'F': clearopt = pfctl_lookup_option(optarg, clearopt_list); if (clearopt == NULL) { warnx("Unknown flush modifier '%s'", optarg); usage(); } mode = O_RDWR; break; case 'i': ifaceopt = optarg; break; case 'k': if (state_killers >= 2) { warnx("can only specify -k twice"); usage(); /* NOTREACHED */ } state_kill[state_killers++] = optarg; mode = O_RDWR; break; case 'K': if (src_node_killers >= 2) { warnx("can only specify -K twice"); usage(); /* NOTREACHED */ } src_node_kill[src_node_killers++] = optarg; mode = O_RDWR; break; case 'm': opts |= PF_OPT_MERGE; break; case 'M': opts |= PF_OPT_KILLMATCH; break; case 'n': opts |= PF_OPT_NOACTION; break; case 'N': loadopt |= PFCTL_FLAG_NAT; break; case 'r': opts |= PF_OPT_USEDNS; break; case 'f': rulesopt = optarg; mode = O_RDWR; break; case 'g': opts |= PF_OPT_DEBUG; break; case 'A': loadopt |= PFCTL_FLAG_ALTQ; break; case 'R': loadopt |= PFCTL_FLAG_FILTER; break; case 'o': optiopt = pfctl_lookup_option(optarg, optiopt_list); if (optiopt == NULL) { warnx("Unknown optimization '%s'", optarg); usage(); } opts |= PF_OPT_OPTIMIZE; break; case 'O': loadopt |= PFCTL_FLAG_OPTION; break; case 'p': pf_device = optarg; break; case 'P': opts |= PF_OPT_NUMERIC; break; case 's': showopt = pfctl_lookup_option(optarg, showopt_list); if (showopt == NULL) { warnx("Unknown show modifier '%s'", optarg); usage(); } break; case 't': tableopt = optarg; break; case 'T': tblcmdopt = pfctl_lookup_option(optarg, tblcmdopt_list); if (tblcmdopt == NULL) { warnx("Unknown table command '%s'", optarg); usage(); } break; case 'v': if (opts & PF_OPT_VERBOSE) opts |= PF_OPT_VERBOSE2; opts |= PF_OPT_VERBOSE; break; case 'x': debugopt = pfctl_lookup_option(optarg, debugopt_list); if (debugopt == NULL) { warnx("Unknown debug level '%s'", optarg); usage(); } mode = O_RDWR; break; case 'z': opts |= PF_OPT_CLRRULECTRS; mode = O_RDWR; break; case 'h': /* FALLTHROUGH */ default: usage(); /* NOTREACHED */ } } if (tblcmdopt != NULL) { argc -= optind; argv += optind; ch = *tblcmdopt; if (ch == 'l') { loadopt |= PFCTL_FLAG_TABLE; tblcmdopt = NULL; } else mode = strchr("acdefkrz", ch) ? O_RDWR : O_RDONLY; } else if (argc != optind) { warnx("unknown command line argument: %s ...", argv[optind]); usage(); /* NOTREACHED */ } if (loadopt == 0) loadopt = ~0; if ((path = calloc(1, MAXPATHLEN)) == NULL) errx(1, "pfctl: calloc"); memset(anchorname, 0, sizeof(anchorname)); if (anchoropt != NULL) { int len = strlen(anchoropt); if (anchoropt[len - 1] == '*') { if (len >= 2 && anchoropt[len - 2] == '/') anchoropt[len - 2] = '\0'; else anchoropt[len - 1] = '\0'; opts |= PF_OPT_RECURSE; } if (strlcpy(anchorname, anchoropt, sizeof(anchorname)) >= sizeof(anchorname)) errx(1, "anchor name '%s' too long", anchoropt); loadopt &= PFCTL_FLAG_FILTER|PFCTL_FLAG_NAT|PFCTL_FLAG_TABLE|PFCTL_FLAG_ETH; } if ((opts & PF_OPT_NOACTION) == 0) { dev = open(pf_device, mode); if (dev == -1) err(1, "%s", pf_device); altqsupport = pfctl_test_altqsupport(dev, opts); } else { dev = open(pf_device, O_RDONLY); if (dev >= 0) opts |= PF_OPT_DUMMYACTION; /* turn off options */ opts &= ~ (PF_OPT_DISABLE | PF_OPT_ENABLE); clearopt = showopt = debugopt = NULL; #if !defined(ENABLE_ALTQ) altqsupport = 0; #else altqsupport = 1; #endif } if (opts & PF_OPT_DISABLE) if (pfctl_disable(dev, opts)) error = 1; if (showopt != NULL) { switch (*showopt) { case 'A': pfctl_show_anchors(dev, opts, anchorname); pfctl_show_eth_anchors(dev, opts, anchorname); break; case 'r': pfctl_load_fingerprints(dev, opts); pfctl_show_rules(dev, path, opts, PFCTL_SHOW_RULES, anchorname, 0); break; case 'l': pfctl_load_fingerprints(dev, opts); pfctl_show_rules(dev, path, opts, PFCTL_SHOW_LABELS, anchorname, 0); break; case 'n': pfctl_load_fingerprints(dev, opts); pfctl_show_nat(dev, path, opts, anchorname, 0); break; case 'q': pfctl_show_altq(dev, ifaceopt, opts, opts & PF_OPT_VERBOSE2); break; case 's': pfctl_show_states(dev, ifaceopt, opts); break; case 'S': pfctl_show_src_nodes(dev, opts); break; case 'i': pfctl_show_status(dev, opts); break; case 'R': error = pfctl_show_running(dev); break; case 't': pfctl_show_timeouts(dev, opts); break; case 'm': pfctl_show_limits(dev, opts); break; case 'e': pfctl_show_eth_rules(dev, path, opts, 0, anchorname, 0); break; case 'a': opts |= PF_OPT_SHOWALL; pfctl_load_fingerprints(dev, opts); pfctl_show_eth_rules(dev, path, opts, 0, anchorname, 0); pfctl_show_nat(dev, path, opts, anchorname, 0); pfctl_show_rules(dev, path, opts, 0, anchorname, 0); pfctl_show_altq(dev, ifaceopt, opts, 0); pfctl_show_states(dev, ifaceopt, opts); pfctl_show_src_nodes(dev, opts); pfctl_show_status(dev, opts); pfctl_show_rules(dev, path, opts, 1, anchorname, 0); pfctl_show_timeouts(dev, opts); pfctl_show_limits(dev, opts); pfctl_show_tables(anchorname, opts); pfctl_show_fingerprints(opts); break; case 'T': pfctl_show_tables(anchorname, opts); break; case 'o': pfctl_load_fingerprints(dev, opts); pfctl_show_fingerprints(opts); break; case 'I': pfctl_show_ifaces(ifaceopt, opts); break; } } if ((opts & PF_OPT_CLRRULECTRS) && showopt == NULL) { pfctl_show_eth_rules(dev, path, opts, PFCTL_SHOW_NOTHING, anchorname, 0); pfctl_show_rules(dev, path, opts, PFCTL_SHOW_NOTHING, anchorname, 0); } if (clearopt != NULL) { if (anchorname[0] == '_' || strstr(anchorname, "/_") != NULL) errx(1, "anchor names beginning with '_' cannot " "be modified from the command line"); switch (*clearopt) { case 'e': pfctl_flush_eth_rules(dev, opts, anchorname); break; case 'r': pfctl_flush_rules(dev, opts, anchorname); break; case 'n': pfctl_flush_nat(dev, opts, anchorname); break; case 'q': pfctl_clear_altq(dev, opts); break; case 's': pfctl_clear_iface_states(dev, ifaceopt, opts); break; case 'S': pfctl_clear_src_nodes(dev, opts); break; case 'i': pfctl_clear_stats(dev, opts); break; case 'a': pfctl_flush_eth_rules(dev, opts, anchorname); pfctl_flush_rules(dev, opts, anchorname); pfctl_flush_nat(dev, opts, anchorname); pfctl_clear_tables(anchorname, opts); if (!*anchorname) { pfctl_clear_altq(dev, opts); pfctl_clear_iface_states(dev, ifaceopt, opts); pfctl_clear_src_nodes(dev, opts); pfctl_clear_stats(dev, opts); pfctl_clear_fingerprints(dev, opts); pfctl_clear_interface_flags(dev, opts); } break; case 'o': pfctl_clear_fingerprints(dev, opts); break; case 'T': pfctl_clear_tables(anchorname, opts); break; } } if (state_killers) { if (!strcmp(state_kill[0], "label")) pfctl_label_kill_states(dev, ifaceopt, opts); else if (!strcmp(state_kill[0], "id")) pfctl_id_kill_states(dev, ifaceopt, opts); else if (!strcmp(state_kill[0], "gateway")) pfctl_gateway_kill_states(dev, ifaceopt, opts); else pfctl_net_kill_states(dev, ifaceopt, opts); } if (src_node_killers) pfctl_kill_src_nodes(dev, ifaceopt, opts); if (tblcmdopt != NULL) { error = pfctl_command_tables(argc, argv, tableopt, tblcmdopt, rulesopt, anchorname, opts); rulesopt = NULL; } if (optiopt != NULL) { switch (*optiopt) { case 'n': optimize = 0; break; case 'b': optimize |= PF_OPTIMIZE_BASIC; break; case 'o': case 'p': optimize |= PF_OPTIMIZE_PROFILE; break; } } if ((rulesopt != NULL) && (loadopt & PFCTL_FLAG_OPTION) && !anchorname[0] && !(opts & PF_OPT_NOACTION)) if (pfctl_get_skip_ifaces()) error = 1; if (rulesopt != NULL && !(opts & (PF_OPT_MERGE|PF_OPT_NOACTION)) && !anchorname[0] && (loadopt & PFCTL_FLAG_OPTION)) if (pfctl_file_fingerprints(dev, opts, PF_OSFP_FILE)) error = 1; if (rulesopt != NULL) { if (anchorname[0] == '_' || strstr(anchorname, "/_") != NULL) errx(1, "anchor names beginning with '_' cannot " "be modified from the command line"); if (pfctl_rules(dev, rulesopt, opts, optimize, anchorname, NULL)) error = 1; else if (!(opts & PF_OPT_NOACTION) && (loadopt & PFCTL_FLAG_TABLE)) warn_namespace_collision(NULL); } if (opts & PF_OPT_ENABLE) if (pfctl_enable(dev, opts)) error = 1; if (debugopt != NULL) { switch (*debugopt) { case 'n': pfctl_debug(dev, PF_DEBUG_NONE, opts); break; case 'u': pfctl_debug(dev, PF_DEBUG_URGENT, opts); break; case 'm': pfctl_debug(dev, PF_DEBUG_MISC, opts); break; case 'l': pfctl_debug(dev, PF_DEBUG_NOISY, opts); break; } } exit(error); }