1 /* $OpenBSD: pf_print_state.c,v 1.52 2008/08/12 16:40:18 david Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2001 Daniel Hartmeier 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * - Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * - Redistributions in binary form must reproduce the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer in the documentation and/or other materials provided 18 * with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 #include <sys/endian.h> 38 #include <net/if.h> 39 #define TCPSTATES 40 #include <netinet/tcp_fsm.h> 41 #include <netinet/sctp.h> 42 #include <net/pfvar.h> 43 #include <arpa/inet.h> 44 #include <netdb.h> 45 46 #include <stdint.h> 47 #include <stdio.h> 48 #include <string.h> 49 50 #include "pfctl_parser.h" 51 #include "pfctl.h" 52 53 void print_name(struct pf_addr *, sa_family_t); 54 55 void 56 print_addr(struct pf_addr_wrap *addr, sa_family_t af, int verbose) 57 { 58 switch (addr->type) { 59 case PF_ADDR_DYNIFTL: 60 printf("(%s", addr->v.ifname); 61 if (addr->iflags & PFI_AFLAG_NETWORK) 62 printf(":network"); 63 if (addr->iflags & PFI_AFLAG_BROADCAST) 64 printf(":broadcast"); 65 if (addr->iflags & PFI_AFLAG_PEER) 66 printf(":peer"); 67 if (addr->iflags & PFI_AFLAG_NOALIAS) 68 printf(":0"); 69 if (verbose) { 70 if (addr->p.dyncnt <= 0) 71 printf(":*"); 72 else 73 printf(":%d", addr->p.dyncnt); 74 } 75 printf(")"); 76 break; 77 case PF_ADDR_TABLE: 78 if (verbose) 79 if (addr->p.tblcnt == -1) 80 printf("<%s:*>", addr->v.tblname); 81 else 82 printf("<%s:%d>", addr->v.tblname, 83 addr->p.tblcnt); 84 else 85 printf("<%s>", addr->v.tblname); 86 return; 87 case PF_ADDR_RANGE: { 88 print_addr_str(af, &addr->v.a.addr); 89 printf(" - "); 90 print_addr_str(af, &addr->v.a.mask); 91 92 break; 93 } 94 case PF_ADDR_ADDRMASK: 95 if (PF_AZERO(&addr->v.a.addr, AF_INET6) && 96 PF_AZERO(&addr->v.a.mask, AF_INET6)) 97 printf("any"); 98 else 99 print_addr_str(af, &addr->v.a.addr); 100 break; 101 case PF_ADDR_NOROUTE: 102 printf("no-route"); 103 return; 104 case PF_ADDR_URPFFAILED: 105 printf("urpf-failed"); 106 return; 107 default: 108 printf("?"); 109 return; 110 } 111 112 /* mask if not _both_ address and mask are zero */ 113 if (addr->type != PF_ADDR_RANGE && 114 !(PF_AZERO(&addr->v.a.addr, AF_INET6) && 115 PF_AZERO(&addr->v.a.mask, AF_INET6))) { 116 if (af == AF_INET || af == AF_INET6) { 117 int bits = unmask(&addr->v.a.mask); 118 if (bits < (af == AF_INET ? 32 : 128)) 119 printf("/%d", bits); 120 } 121 } 122 } 123 124 void 125 print_addr_str(sa_family_t af, struct pf_addr *addr) 126 { 127 static char buf[48]; 128 129 if (inet_ntop(af, addr, buf, sizeof(buf)) == NULL) 130 printf("?"); 131 else 132 printf("%s", buf); 133 } 134 135 void 136 print_name(struct pf_addr *addr, sa_family_t af) 137 { 138 struct sockaddr_storage ss; 139 struct sockaddr_in *sin; 140 struct sockaddr_in6 *sin6; 141 char host[NI_MAXHOST]; 142 143 memset(&ss, 0, sizeof(ss)); 144 ss.ss_family = af; 145 if (ss.ss_family == AF_INET) { 146 sin = (struct sockaddr_in *)&ss; 147 sin->sin_len = sizeof(*sin); 148 sin->sin_addr = addr->v4; 149 } else { 150 sin6 = (struct sockaddr_in6 *)&ss; 151 sin6->sin6_len = sizeof(*sin6); 152 sin6->sin6_addr = addr->v6; 153 } 154 155 if (getnameinfo((struct sockaddr *)&ss, ss.ss_len, host, sizeof(host), 156 NULL, 0, NI_NOFQDN) != 0) 157 printf("?"); 158 else 159 printf("%s", host); 160 } 161 162 void 163 print_host(struct pf_addr *addr, u_int16_t port, sa_family_t af, int opts) 164 { 165 struct pf_addr_wrap aw; 166 167 if (opts & PF_OPT_USEDNS) 168 print_name(addr, af); 169 else { 170 memset(&aw, 0, sizeof(aw)); 171 aw.v.a.addr = *addr; 172 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask)); 173 print_addr(&aw, af, opts & PF_OPT_VERBOSE2); 174 } 175 176 if (port) { 177 if (af == AF_INET) 178 printf(":%u", ntohs(port)); 179 else 180 printf("[%u]", ntohs(port)); 181 } 182 } 183 184 void 185 print_seq(struct pfctl_state_peer *p) 186 { 187 if (p->seqdiff) 188 printf("[%u + %u](+%u)", p->seqlo, 189 p->seqhi - p->seqlo, p->seqdiff); 190 else 191 printf("[%u + %u]", p->seqlo, 192 p->seqhi - p->seqlo); 193 } 194 195 196 static const char * 197 sctp_state_name(int state) 198 { 199 switch (state) { 200 case SCTP_CLOSED: 201 return ("CLOSED"); 202 case SCTP_BOUND: 203 return ("BOUND"); 204 case SCTP_LISTEN: 205 return ("LISTEN"); 206 case SCTP_COOKIE_WAIT: 207 return ("COOKIE_WAIT"); 208 case SCTP_COOKIE_ECHOED: 209 return ("COOKIE_ECHOED"); 210 case SCTP_ESTABLISHED: 211 return ("ESTABLISHED"); 212 case SCTP_SHUTDOWN_SENT: 213 return ("SHUTDOWN_SENT"); 214 case SCTP_SHUTDOWN_RECEIVED: 215 return ("SHUTDOWN_RECEIVED"); 216 case SCTP_SHUTDOWN_ACK_SENT: 217 return ("SHUTDOWN_ACK_SENT"); 218 case SCTP_SHUTDOWN_PENDING: 219 return ("SHUTDOWN_PENDING"); 220 default: 221 return ("?"); 222 } 223 } 224 225 void 226 print_state(struct pfctl_state *s, int opts) 227 { 228 struct pfctl_state_peer *src, *dst; 229 struct pfctl_state_key *key, *sk, *nk; 230 const char *protoname; 231 int min, sec; 232 uint8_t proto; 233 int afto = (s->key[PF_SK_STACK].af != s->key[PF_SK_WIRE].af); 234 int idx; 235 const char *sn_type_names[] = PF_SN_TYPE_NAMES; 236 #ifndef __NO_STRICT_ALIGNMENT 237 struct pfctl_state_key aligned_key[2]; 238 239 bcopy(&s->key, aligned_key, sizeof(aligned_key)); 240 key = aligned_key; 241 #else 242 key = s->key; 243 #endif 244 245 proto = s->key[PF_SK_WIRE].proto; 246 247 if (s->direction == PF_OUT) { 248 src = &s->src; 249 dst = &s->dst; 250 sk = &key[PF_SK_STACK]; 251 nk = &key[PF_SK_WIRE]; 252 if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6) 253 sk->port[0] = nk->port[0]; 254 } else { 255 src = &s->dst; 256 dst = &s->src; 257 sk = &key[PF_SK_WIRE]; 258 nk = &key[PF_SK_STACK]; 259 if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6) 260 sk->port[1] = nk->port[1]; 261 } 262 printf("%s ", s->ifname); 263 if ((protoname = pfctl_proto2name(proto)) != NULL) 264 printf("%s ", protoname); 265 else 266 printf("%u ", proto); 267 268 print_host(&nk->addr[1], nk->port[1], nk->af, opts); 269 if (nk->af != sk->af || PF_ANEQ(&nk->addr[1], &sk->addr[1], nk->af) || 270 nk->port[1] != sk->port[1]) { 271 idx = afto ? 0 : 1; 272 printf(" ("); 273 print_host(&sk->addr[idx], sk->port[idx], sk->af, 274 opts); 275 printf(")"); 276 } 277 if (s->direction == PF_OUT || (afto && s->direction == PF_IN)) 278 printf(" -> "); 279 else 280 printf(" <- "); 281 print_host(&nk->addr[0], nk->port[0], nk->af, opts); 282 if (nk->af != sk->af || PF_ANEQ(&nk->addr[0], &sk->addr[0], nk->af) || 283 nk->port[0] != sk->port[0]) { 284 idx = afto ? 1 : 0; 285 printf(" ("); 286 print_host(&sk->addr[idx], sk->port[idx], sk->af, 287 opts); 288 printf(")"); 289 } 290 291 printf(" "); 292 if (proto == IPPROTO_TCP) { 293 if (src->state <= TCPS_TIME_WAIT && 294 dst->state <= TCPS_TIME_WAIT) 295 printf(" %s:%s\n", tcpstates[src->state], 296 tcpstates[dst->state]); 297 else if (src->state == PF_TCPS_PROXY_SRC || 298 dst->state == PF_TCPS_PROXY_SRC) 299 printf(" PROXY:SRC\n"); 300 else if (src->state == PF_TCPS_PROXY_DST || 301 dst->state == PF_TCPS_PROXY_DST) 302 printf(" PROXY:DST\n"); 303 else 304 printf(" <BAD STATE LEVELS %u:%u>\n", 305 src->state, dst->state); 306 if (opts & PF_OPT_VERBOSE) { 307 printf(" "); 308 print_seq(src); 309 if (src->wscale && dst->wscale) 310 printf(" wscale %u", 311 src->wscale & PF_WSCALE_MASK); 312 printf(" "); 313 print_seq(dst); 314 if (src->wscale && dst->wscale) 315 printf(" wscale %u", 316 dst->wscale & PF_WSCALE_MASK); 317 printf("\n"); 318 } 319 } else if (proto == IPPROTO_UDP && src->state < PFUDPS_NSTATES && 320 dst->state < PFUDPS_NSTATES) { 321 const char *states[] = PFUDPS_NAMES; 322 323 printf(" %s:%s\n", states[src->state], states[dst->state]); 324 } else if (proto == IPPROTO_SCTP) { 325 printf(" %s:%s\n", sctp_state_name(src->state), 326 sctp_state_name(dst->state)); 327 #ifndef INET6 328 } else if (proto != IPPROTO_ICMP && src->state < PFOTHERS_NSTATES && 329 dst->state < PFOTHERS_NSTATES) { 330 #else 331 } else if (proto != IPPROTO_ICMP && proto != IPPROTO_ICMPV6 && 332 src->state < PFOTHERS_NSTATES && dst->state < PFOTHERS_NSTATES) { 333 #endif 334 /* XXX ICMP doesn't really have state levels */ 335 const char *states[] = PFOTHERS_NAMES; 336 337 printf(" %s:%s\n", states[src->state], states[dst->state]); 338 } else { 339 printf(" %u:%u\n", src->state, dst->state); 340 } 341 342 if (opts & PF_OPT_VERBOSE) { 343 u_int32_t creation = s->creation; 344 u_int32_t expire = s->expire; 345 346 sec = creation % 60; 347 creation /= 60; 348 min = creation % 60; 349 creation /= 60; 350 printf(" age %.2u:%.2u:%.2u", creation, min, sec); 351 sec = expire % 60; 352 expire /= 60; 353 min = expire % 60; 354 expire /= 60; 355 printf(", expires in %.2u:%.2u:%.2u", expire, min, sec); 356 357 printf(", %ju:%ju pkts, %ju:%ju bytes", 358 s->packets[0], 359 s->packets[1], 360 s->bytes[0], 361 s->bytes[1]); 362 if (s->anchor != -1) 363 printf(", anchor %u", s->anchor); 364 if (s->rule != -1) 365 printf(", rule %u", s->rule); 366 if (s->state_flags & PFSTATE_ALLOWOPTS) 367 printf(", allow-opts"); 368 if (s->state_flags & PFSTATE_SLOPPY) 369 printf(", sloppy"); 370 if (s->state_flags & PFSTATE_NOSYNC) 371 printf(", no-sync"); 372 if (s->state_flags & PFSTATE_PFLOW) 373 printf(", pflow"); 374 if (s->state_flags & PFSTATE_ACK) 375 printf(", psync-ack"); 376 if (s->state_flags & PFSTATE_NODF) 377 printf(", no-df"); 378 if (s->state_flags & PFSTATE_SETTOS) 379 printf(", set-tos 0x%2.2x", s->set_tos); 380 if (s->state_flags & PFSTATE_RANDOMID) 381 printf(", random-id"); 382 if (s->state_flags & PFSTATE_SCRUB_TCP) 383 printf(", reassemble-tcp"); 384 if (s->state_flags & PFSTATE_SETPRIO) 385 printf(", set-prio (0x%02x 0x%02x)", 386 s->set_prio[0], s->set_prio[1]); 387 if (s->dnpipe || s->dnrpipe) { 388 if (s->state_flags & PFSTATE_DN_IS_PIPE) 389 printf(", dummynet pipe (%d %d)", 390 s->dnpipe, s->dnrpipe); 391 if (s->state_flags & PFSTATE_DN_IS_QUEUE) 392 printf(", dummynet queue (%d %d)", 393 s->dnpipe, s->dnrpipe); 394 } 395 if (s->src_node_flags & PFSTATE_SRC_NODE_LIMIT) 396 printf(", %s", sn_type_names[PF_SN_LIMIT]); 397 if (s->src_node_flags & PFSTATE_SRC_NODE_LIMIT_GLOBAL) 398 printf(" global"); 399 if (s->src_node_flags & PFSTATE_SRC_NODE_NAT) 400 printf(", %s", sn_type_names[PF_SN_NAT]); 401 if (s->src_node_flags & PFSTATE_SRC_NODE_ROUTE) 402 printf(", %s", sn_type_names[PF_SN_ROUTE]); 403 if (s->log) 404 printf(", log"); 405 if (s->log & PF_LOG_ALL) 406 printf(" (all)"); 407 if (s->min_ttl) 408 printf(", min-ttl %d", s->min_ttl); 409 if (s->max_mss) 410 printf(", max-mss %d", s->max_mss); 411 printf("\n"); 412 } 413 if (opts & PF_OPT_VERBOSE2) { 414 u_int64_t id; 415 416 bcopy(&s->id, &id, sizeof(u_int64_t)); 417 printf(" id: %016jx creatorid: %08x", id, s->creatorid); 418 if (s->rt) { 419 switch (s->rt) { 420 case PF_ROUTETO: 421 printf(" route-to: "); 422 break; 423 case PF_DUPTO: 424 printf(" dup-to: "); 425 break; 426 case PF_REPLYTO: 427 printf(" reply-to: "); 428 break; 429 default: 430 printf(" gateway: "); 431 } 432 print_host(&s->rt_addr, 0, s->rt_af, opts); 433 if (s->rt_ifname[0]) 434 printf("@%s", s->rt_ifname); 435 } 436 if (s->rtableid != -1) 437 printf(" rtable: %d", s->rtableid); 438 printf("\n"); 439 440 if (strcmp(s->ifname, s->orig_ifname) != 0) 441 printf(" origif: %s\n", s->orig_ifname); 442 } 443 } 444 445 int 446 unmask(struct pf_addr *m) 447 { 448 int i = 31, j = 0, b = 0; 449 u_int32_t tmp; 450 451 while (j < 4 && m->addr32[j] == 0xffffffff) { 452 b += 32; 453 j++; 454 } 455 if (j < 4) { 456 tmp = ntohl(m->addr32[j]); 457 for (i = 31; tmp & (1 << i); --i) 458 b++; 459 } 460 return (b); 461 } 462