1 /* 2 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> 3 * Copyright (c) 2002 Michael Shalayeff 4 * Copyright (c) 2001 Daniel Hartmeier 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 26 * THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $OpenBSD: print-pfsync.c,v 1.38 2012/09/19 13:50:36 mikeb Exp $ 29 * $OpenBSD: pf_print_state.c,v 1.11 2012/07/08 17:48:37 lteo Exp $ 30 */ 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #ifndef HAVE_NET_PFVAR_H 37 #error "No pf headers available" 38 #endif 39 #include <sys/endian.h> 40 #include <net/if.h> 41 #include <net/pfvar.h> 42 #include <net/if_pfsync.h> 43 #define TCPSTATES 44 #include <netinet/tcp_fsm.h> 45 46 #include <netdissect-stdinc.h> 47 #include <string.h> 48 49 #include "netdissect.h" 50 #include "interface.h" 51 #include "addrtoname.h" 52 53 static void pfsync_print(netdissect_options *, struct pfsync_header *, 54 const u_char *, u_int); 55 static void print_src_dst(netdissect_options *, 56 const struct pfsync_state_peer *, 57 const struct pfsync_state_peer *, uint8_t); 58 static void print_state(netdissect_options *, union pfsync_state_union *, int); 59 60 void 61 pfsync_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 62 register const u_char *p) 63 { 64 u_int caplen = h->caplen; 65 66 ts_print(ndo, &h->ts); 67 68 if (caplen < PFSYNC_HDRLEN) { 69 ND_PRINT("[|pfsync]"); 70 goto out; 71 } 72 73 pfsync_print(ndo, (struct pfsync_header *)p, 74 p + sizeof(struct pfsync_header), 75 caplen - sizeof(struct pfsync_header)); 76 out: 77 if (ndo->ndo_xflag) { 78 hex_print(ndo, "\n\t", p, caplen); 79 } 80 fn_print_char(ndo, '\n'); 81 return; 82 } 83 84 void 85 pfsync_ip_print(netdissect_options *ndo , const u_char *bp, u_int len) 86 { 87 struct pfsync_header *hdr = (struct pfsync_header *)bp; 88 89 if (len < PFSYNC_HDRLEN) 90 ND_PRINT("[|pfsync]"); 91 else 92 pfsync_print(ndo, hdr, bp + sizeof(struct pfsync_header), 93 len - sizeof(struct pfsync_header)); 94 } 95 96 struct pfsync_actions { 97 const char *name; 98 size_t len; 99 void (*print)(netdissect_options *, const void *); 100 }; 101 102 static void pfsync_print_clr(netdissect_options *, const void *); 103 static void pfsync_print_state_1301(netdissect_options *, const void *); 104 static void pfsync_print_state_1400(netdissect_options *, const void *); 105 static void pfsync_print_ins_ack(netdissect_options *, const void *); 106 static void pfsync_print_upd_c(netdissect_options *, const void *); 107 static void pfsync_print_upd_req(netdissect_options *, const void *); 108 static void pfsync_print_del_c(netdissect_options *, const void *); 109 static void pfsync_print_bus(netdissect_options *, const void *); 110 static void pfsync_print_tdb(netdissect_options *, const void *); 111 112 struct pfsync_actions actions[] = { 113 { "clear all", sizeof(struct pfsync_clr), pfsync_print_clr }, 114 { "insert 13.1", sizeof(struct pfsync_state_1301), 115 pfsync_print_state_1301 }, 116 { "insert ack", sizeof(struct pfsync_ins_ack), pfsync_print_ins_ack }, 117 { "update 13.1", sizeof(struct pfsync_state_1301), 118 pfsync_print_state_1301 }, 119 { "update compressed", sizeof(struct pfsync_upd_c), 120 pfsync_print_upd_c }, 121 { "request uncompressed", sizeof(struct pfsync_upd_req), 122 pfsync_print_upd_req }, 123 { "delete", sizeof(struct pfsync_state_1301), pfsync_print_state_1301 }, 124 { "delete compressed", sizeof(struct pfsync_del_c), 125 pfsync_print_del_c }, 126 { "frag insert", 0, NULL }, 127 { "frag delete", 0, NULL }, 128 { "bulk update status", sizeof(struct pfsync_bus), 129 pfsync_print_bus }, 130 { "tdb", 0, pfsync_print_tdb }, 131 { "eof", 0, NULL }, 132 { "insert", sizeof(struct pfsync_state_1400), pfsync_print_state_1400 }, 133 { "update", sizeof(struct pfsync_state_1400), pfsync_print_state_1400 }, 134 }; 135 136 static void 137 pfsync_print(netdissect_options *ndo, struct pfsync_header *hdr, 138 const u_char *bp, u_int len) 139 { 140 struct pfsync_subheader *subh; 141 int count, plen, i; 142 u_int alen; 143 144 plen = ntohs(hdr->len); 145 146 ND_PRINT("PFSYNCv%d len %d", hdr->version, plen); 147 148 if (hdr->version != PFSYNC_VERSION) 149 return; 150 151 plen -= sizeof(*hdr); 152 153 while (plen > 0) { 154 if (len < sizeof(*subh)) 155 break; 156 157 subh = (struct pfsync_subheader *)bp; 158 bp += sizeof(*subh); 159 len -= sizeof(*subh); 160 plen -= sizeof(*subh); 161 162 if (subh->action >= PFSYNC_ACT_MAX) { 163 ND_PRINT("\n act UNKNOWN id %d", 164 subh->action); 165 return; 166 } 167 168 count = ntohs(subh->count); 169 ND_PRINT("\n %s count %d", actions[subh->action].name, 170 count); 171 alen = actions[subh->action].len; 172 173 if (subh->action == PFSYNC_ACT_EOF) 174 return; 175 176 if (actions[subh->action].print == NULL) { 177 ND_PRINT("\n unimplemented action %hhu", 178 subh->action); 179 return; 180 } 181 182 for (i = 0; i < count; i++) { 183 if (len < alen) { 184 len = 0; 185 break; 186 } 187 188 if (ndo->ndo_vflag) 189 actions[subh->action].print(ndo, bp); 190 191 bp += alen; 192 len -= alen; 193 plen -= alen; 194 } 195 } 196 197 if (plen > 0) { 198 ND_PRINT("\n ..."); 199 return; 200 } 201 if (plen < 0) { 202 ND_PRINT("\n invalid header length"); 203 return; 204 } 205 if (len > 0) 206 ND_PRINT("\n invalid packet length"); 207 } 208 209 static void 210 pfsync_print_clr(netdissect_options *ndo, const void *bp) 211 { 212 const struct pfsync_clr *clr = bp; 213 214 ND_PRINT("\n\tcreatorid: %08x", htonl(clr->creatorid)); 215 if (clr->ifname[0] != '\0') 216 ND_PRINT(" interface: %s", clr->ifname); 217 } 218 219 static void 220 pfsync_print_state_1301(netdissect_options *ndo, const void *bp) 221 { 222 struct pfsync_state_1301 *st = (struct pfsync_state_1301 *)bp; 223 224 fn_print_char(ndo, '\n'); 225 print_state(ndo, (union pfsync_state_union *)st, PFSYNC_MSG_VERSION_1301); 226 } 227 228 static void 229 pfsync_print_state_1400(netdissect_options *ndo, const void *bp) 230 { 231 struct pfsync_state_1301 *st = (struct pfsync_state_1301 *)bp; 232 233 fn_print_char(ndo, '\n'); 234 print_state(ndo, (union pfsync_state_union *)st, PFSYNC_MSG_VERSION_1400); 235 } 236 237 static void 238 pfsync_print_ins_ack(netdissect_options *ndo, const void *bp) 239 { 240 const struct pfsync_ins_ack *iack = bp; 241 242 ND_PRINT("\n\tid: %016jx creatorid: %08x", 243 (uintmax_t)be64toh(iack->id), ntohl(iack->creatorid)); 244 } 245 246 static void 247 pfsync_print_upd_c(netdissect_options *ndo, const void *bp) 248 { 249 const struct pfsync_upd_c *u = bp; 250 251 ND_PRINT("\n\tid: %016jx creatorid: %08x", 252 (uintmax_t)be64toh(u->id), ntohl(u->creatorid)); 253 if (ndo->ndo_vflag > 2) { 254 ND_PRINT("\n\tTCP? :"); 255 print_src_dst(ndo, &u->src, &u->dst, IPPROTO_TCP); 256 } 257 } 258 259 static void 260 pfsync_print_upd_req(netdissect_options *ndo, const void *bp) 261 { 262 const struct pfsync_upd_req *ur = bp; 263 264 ND_PRINT("\n\tid: %016jx creatorid: %08x", 265 (uintmax_t)be64toh(ur->id), ntohl(ur->creatorid)); 266 } 267 268 static void 269 pfsync_print_del_c(netdissect_options *ndo, const void *bp) 270 { 271 const struct pfsync_del_c *d = bp; 272 273 ND_PRINT("\n\tid: %016jx creatorid: %08x", 274 (uintmax_t)be64toh(d->id), ntohl(d->creatorid)); 275 } 276 277 static void 278 pfsync_print_bus(netdissect_options *ndo, const void *bp) 279 { 280 const struct pfsync_bus *b = bp; 281 uint32_t endtime; 282 int min, sec; 283 const char *status; 284 285 endtime = ntohl(b->endtime); 286 sec = endtime % 60; 287 endtime /= 60; 288 min = endtime % 60; 289 endtime /= 60; 290 291 switch (b->status) { 292 case PFSYNC_BUS_START: 293 status = "start"; 294 break; 295 case PFSYNC_BUS_END: 296 status = "end"; 297 break; 298 default: 299 status = "UNKNOWN"; 300 break; 301 } 302 303 ND_PRINT("\n\tcreatorid: %08x age: %.2u:%.2u:%.2u status: %s", 304 htonl(b->creatorid), endtime, min, sec, status); 305 } 306 307 static void 308 pfsync_print_tdb(netdissect_options *ndo, const void *bp) 309 { 310 const struct pfsync_tdb *t = bp; 311 312 ND_PRINT("\n\tspi: 0x%08x rpl: %ju cur_bytes: %ju", 313 ntohl(t->spi), (uintmax_t )be64toh(t->rpl), 314 (uintmax_t )be64toh(t->cur_bytes)); 315 } 316 317 static void 318 print_host(netdissect_options *ndo, struct pf_addr *addr, uint16_t port, 319 sa_family_t af, const char *proto) 320 { 321 char buf[48]; 322 323 if (inet_ntop(af, addr, buf, sizeof(buf)) == NULL) 324 ND_PRINT("?"); 325 else 326 ND_PRINT("%s", buf); 327 328 if (port) 329 ND_PRINT(".%hu", ntohs(port)); 330 } 331 332 static void 333 print_seq(netdissect_options *ndo, const struct pfsync_state_peer *p) 334 { 335 if (p->seqdiff) 336 ND_PRINT("[%u + %u](+%u)", ntohl(p->seqlo), 337 ntohl(p->seqhi) - ntohl(p->seqlo), ntohl(p->seqdiff)); 338 else 339 ND_PRINT("[%u + %u]", ntohl(p->seqlo), 340 ntohl(p->seqhi) - ntohl(p->seqlo)); 341 } 342 343 static void 344 print_src_dst(netdissect_options *ndo, const struct pfsync_state_peer *src, 345 const struct pfsync_state_peer *dst, uint8_t proto) 346 { 347 348 if (proto == IPPROTO_TCP) { 349 if (src->state <= TCPS_TIME_WAIT && 350 dst->state <= TCPS_TIME_WAIT) 351 ND_PRINT(" %s:%s", tcpstates[src->state], 352 tcpstates[dst->state]); 353 else if (src->state == PF_TCPS_PROXY_SRC || 354 dst->state == PF_TCPS_PROXY_SRC) 355 ND_PRINT(" PROXY:SRC"); 356 else if (src->state == PF_TCPS_PROXY_DST || 357 dst->state == PF_TCPS_PROXY_DST) 358 ND_PRINT(" PROXY:DST"); 359 else 360 ND_PRINT(" <BAD STATE LEVELS %u:%u>", 361 src->state, dst->state); 362 if (ndo->ndo_vflag > 1) { 363 ND_PRINT("\n\t"); 364 print_seq(ndo, src); 365 if (src->wscale && dst->wscale) 366 ND_PRINT(" wscale %u", 367 src->wscale & PF_WSCALE_MASK); 368 ND_PRINT(" "); 369 print_seq(ndo, dst); 370 if (src->wscale && dst->wscale) 371 ND_PRINT(" wscale %u", 372 dst->wscale & PF_WSCALE_MASK); 373 } 374 } else if (proto == IPPROTO_UDP && src->state < PFUDPS_NSTATES && 375 dst->state < PFUDPS_NSTATES) { 376 const char *states[] = PFUDPS_NAMES; 377 378 ND_PRINT(" %s:%s", states[src->state], states[dst->state]); 379 } else if (proto != IPPROTO_ICMP && src->state < PFOTHERS_NSTATES && 380 dst->state < PFOTHERS_NSTATES) { 381 /* XXX ICMP doesn't really have state levels */ 382 const char *states[] = PFOTHERS_NAMES; 383 384 ND_PRINT(" %s:%s", states[src->state], states[dst->state]); 385 } else { 386 ND_PRINT(" %u:%u", src->state, dst->state); 387 } 388 } 389 390 static void 391 print_state(netdissect_options *ndo, union pfsync_state_union *s, int version) 392 { 393 struct pfsync_state_peer *src, *dst; 394 struct pfsync_state_key *sk, *nk; 395 int min, sec; 396 397 if (s->pfs_1301.direction == PF_OUT) { 398 src = &s->pfs_1301.src; 399 dst = &s->pfs_1301.dst; 400 sk = &s->pfs_1301.key[PF_SK_STACK]; 401 nk = &s->pfs_1301.key[PF_SK_WIRE]; 402 if (s->pfs_1301.proto == IPPROTO_ICMP || s->pfs_1301.proto == IPPROTO_ICMPV6) 403 sk->port[0] = nk->port[0]; 404 } else { 405 src = &s->pfs_1301.dst; 406 dst = &s->pfs_1301.src; 407 sk = &s->pfs_1301.key[PF_SK_WIRE]; 408 nk = &s->pfs_1301.key[PF_SK_STACK]; 409 if (s->pfs_1301.proto == IPPROTO_ICMP || s->pfs_1301.proto == IPPROTO_ICMPV6) 410 sk->port[1] = nk->port[1]; 411 } 412 ND_PRINT("\t%s ", s->pfs_1301.ifname); 413 ND_PRINT("proto %u ", s->pfs_1301.proto); 414 415 print_host(ndo, &nk->addr[1], nk->port[1], s->pfs_1301.af, NULL); 416 if (PF_ANEQ(&nk->addr[1], &sk->addr[1], s->pfs_1301.af) || 417 nk->port[1] != sk->port[1]) { 418 ND_PRINT((" (")); 419 print_host(ndo, &sk->addr[1], sk->port[1], s->pfs_1301.af, NULL); 420 ND_PRINT(")"); 421 } 422 if (s->pfs_1301.direction == PF_OUT) 423 ND_PRINT((" -> ")); 424 else 425 ND_PRINT((" <- ")); 426 print_host(ndo, &nk->addr[0], nk->port[0], s->pfs_1301.af, NULL); 427 if (PF_ANEQ(&nk->addr[0], &sk->addr[0], s->pfs_1301.af) || 428 nk->port[0] != sk->port[0]) { 429 ND_PRINT((" (")); 430 print_host(ndo, &sk->addr[0], sk->port[0], s->pfs_1301.af, NULL); 431 ND_PRINT((")")); 432 } 433 434 print_src_dst(ndo, src, dst, s->pfs_1301.proto); 435 436 if (ndo->ndo_vflag > 1) { 437 uint64_t packets[2]; 438 uint64_t bytes[2]; 439 uint32_t creation = ntohl(s->pfs_1301.creation); 440 uint32_t expire = ntohl(s->pfs_1301.expire); 441 442 sec = creation % 60; 443 creation /= 60; 444 min = creation % 60; 445 creation /= 60; 446 ND_PRINT("\n\tage %.2u:%.2u:%.2u", creation, min, sec); 447 sec = expire % 60; 448 expire /= 60; 449 min = expire % 60; 450 expire /= 60; 451 ND_PRINT(", expires in %.2u:%.2u:%.2u", expire, min, sec); 452 453 bcopy(s->pfs_1301.packets[0], &packets[0], sizeof(uint64_t)); 454 bcopy(s->pfs_1301.packets[1], &packets[1], sizeof(uint64_t)); 455 bcopy(s->pfs_1301.bytes[0], &bytes[0], sizeof(uint64_t)); 456 bcopy(s->pfs_1301.bytes[1], &bytes[1], sizeof(uint64_t)); 457 ND_PRINT(", %ju:%ju pkts, %ju:%ju bytes", 458 be64toh(packets[0]), be64toh(packets[1]), 459 be64toh(bytes[0]), be64toh(bytes[1])); 460 if (s->pfs_1301.anchor != ntohl(-1)) 461 ND_PRINT(", anchor %u", ntohl(s->pfs_1301.anchor)); 462 if (s->pfs_1301.rule != ntohl(-1)) 463 ND_PRINT(", rule %u", ntohl(s->pfs_1301.rule)); 464 } 465 if (ndo->ndo_vflag > 1) { 466 uint64_t id; 467 468 bcopy(&s->pfs_1301.id, &id, sizeof(uint64_t)); 469 ND_PRINT("\n\tid: %016jx creatorid: %08x", 470 (uintmax_t )be64toh(id), ntohl(s->pfs_1301.creatorid)); 471 } 472 } 473