usr.sbin/pfctl/pfctl_parser.c

   1 /*      $OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */
   2
   3 /*
   4  * Copyright (c) 2001 Daniel Hartmeier
   5  * Copyright (c) 2002,2003 Henning Brauer
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  *    - Redistributions of source code must retain the above copyright
  13  *      notice, this list of conditions and the following disclaimer.
  14  *    - Redistributions in binary form must reproduce the above
  15  *      copyright notice, this list of conditions and the following
  16  *      disclaimer in the documentation and/or other materials provided
  17  *      with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  22  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  23  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  25  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  27  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  29  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/user.h>
  35 #include <sys/types.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/socket.h>
  38 #include <sys/param.h>
  39 #include <net/if.h>
  40 #include <netinet/in.h>
  41 #include <netinet/in_systm.h>
  42 #include <netinet/ip.h>
  43 #include <netinet/ip_icmp.h>
  44 #include <netinet/icmp6.h>
  45 #include <net/pf/pfvar.h>
  46 #include <arpa/inet.h>
  47
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <ctype.h>
  52 #include <netdb.h>
  53 #include <stdarg.h>
  54 #include <errno.h>
  55 #include <err.h>
  56 #include <ifaddrs.h>
  57 #include <unistd.h>
  58
  59 #include "pfctl_parser.h"
  60 #include "pfctl.h"
  61
  62 void             print_op (u_int8_t, const char *, const char *);
  63 void             print_port (u_int8_t, u_int16_t, u_int16_t, const char *);
  64 void             print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
  65 void             print_flags (u_int8_t);
  66 void             print_fromto(struct pf_rule_addr *, pf_osfp_t,
  67                     struct pf_rule_addr *, u_int8_t, u_int8_t, int);
  68 int              ifa_skip_if(const char *filter, struct node_host *p);
  69
  70 struct node_host        *ifa_grouplookup(const char *, int);
  71 struct node_host        *host_if(const char *, int);
  72 static struct node_host *host_v4(const char *);
  73 struct node_host        *host_v6(const char *, int);
  74 struct node_host        *host_dns(const char *, int, int);
  75
  76 const char *tcpflags = "FSRPAUEW";
  77
  78 static const struct icmptypeent icmp_type[] = {
  79         { "echoreq",    ICMP_ECHO },
  80         { "echorep",    ICMP_ECHOREPLY },
  81         { "unreach",    ICMP_UNREACH },
  82         { "squench",    ICMP_SOURCEQUENCH },
  83         { "redir",      ICMP_REDIRECT },
  84         { "althost",    ICMP_ALTHOSTADDR },
  85         { "routeradv",  ICMP_ROUTERADVERT },
  86         { "routersol",  ICMP_ROUTERSOLICIT },
  87         { "timex",      ICMP_TIMXCEED },
  88         { "paramprob",  ICMP_PARAMPROB },
  89         { "timereq",    ICMP_TSTAMP },
  90         { "timerep",    ICMP_TSTAMPREPLY },
  91         { "inforeq",    ICMP_IREQ },
  92         { "inforep",    ICMP_IREQREPLY },
  93         { "maskreq",    ICMP_MASKREQ },
  94         { "maskrep",    ICMP_MASKREPLY },
  95         { "trace",      ICMP_TRACEROUTE },
  96         { "dataconv",   ICMP_DATACONVERR },
  97         { "mobredir",   ICMP_MOBILE_REDIRECT },
  98         { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
  99         { "ipv6-here",  ICMP_IPV6_IAMHERE },
 100         { "mobregreq",  ICMP_MOBILE_REGREQUEST },
 101         { "mobregrep",  ICMP_MOBILE_REGREPLY },
 102         { "skip",       ICMP_SKIP },
 103         { "photuris",   ICMP_PHOTURIS }
 104 };
 105
 106 static const struct icmptypeent icmp6_type[] = {
 107         { "unreach",    ICMP6_DST_UNREACH },
 108         { "toobig",     ICMP6_PACKET_TOO_BIG },
 109         { "timex",      ICMP6_TIME_EXCEEDED },
 110         { "paramprob",  ICMP6_PARAM_PROB },
 111         { "echoreq",    ICMP6_ECHO_REQUEST },
 112         { "echorep",    ICMP6_ECHO_REPLY },
 113         { "groupqry",   ICMP6_MEMBERSHIP_QUERY },
 114         { "listqry",    MLD_LISTENER_QUERY },
 115         { "grouprep",   ICMP6_MEMBERSHIP_REPORT },
 116         { "listenrep",  MLD_LISTENER_REPORT },
 117         { "groupterm",  ICMP6_MEMBERSHIP_REDUCTION },
 118         { "listendone", MLD_LISTENER_DONE },
 119         { "routersol",  ND_ROUTER_SOLICIT },
 120         { "routeradv",  ND_ROUTER_ADVERT },
 121         { "neighbrsol", ND_NEIGHBOR_SOLICIT },
 122         { "neighbradv", ND_NEIGHBOR_ADVERT },
 123         { "redir",      ND_REDIRECT },
 124         { "routrrenum", ICMP6_ROUTER_RENUMBERING },
 125         { "wrureq",     ICMP6_WRUREQUEST },
 126         { "wrurep",     ICMP6_WRUREPLY },
 127         { "fqdnreq",    ICMP6_FQDN_QUERY },
 128         { "fqdnrep",    ICMP6_FQDN_REPLY },
 129         { "niqry",      ICMP6_NI_QUERY },
 130         { "nirep",      ICMP6_NI_REPLY },
 131         { "mtraceresp", MLD_MTRACE_RESP },
 132         { "mtrace",     MLD_MTRACE }
 133 };
 134
 135 static const struct icmpcodeent icmp_code[] = {
 136         { "net-unr",            ICMP_UNREACH,   ICMP_UNREACH_NET },
 137         { "host-unr",           ICMP_UNREACH,   ICMP_UNREACH_HOST },
 138         { "proto-unr",          ICMP_UNREACH,   ICMP_UNREACH_PROTOCOL },
 139         { "port-unr",           ICMP_UNREACH,   ICMP_UNREACH_PORT },
 140         { "needfrag",           ICMP_UNREACH,   ICMP_UNREACH_NEEDFRAG },
 141         { "srcfail",            ICMP_UNREACH,   ICMP_UNREACH_SRCFAIL },
 142         { "net-unk",            ICMP_UNREACH,   ICMP_UNREACH_NET_UNKNOWN },
 143         { "host-unk",           ICMP_UNREACH,   ICMP_UNREACH_HOST_UNKNOWN },
 144         { "isolate",            ICMP_UNREACH,   ICMP_UNREACH_ISOLATED },
 145         { "net-prohib",         ICMP_UNREACH,   ICMP_UNREACH_NET_PROHIB },
 146         { "host-prohib",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PROHIB },
 147         { "net-tos",            ICMP_UNREACH,   ICMP_UNREACH_TOSNET },
 148         { "host-tos",           ICMP_UNREACH,   ICMP_UNREACH_TOSHOST },
 149         { "filter-prohib",      ICMP_UNREACH,   ICMP_UNREACH_FILTER_PROHIB },
 150         { "host-preced",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PRECEDENCE },
 151         { "cutoff-preced",      ICMP_UNREACH,   ICMP_UNREACH_PRECEDENCE_CUTOFF },
 152         { "redir-net",          ICMP_REDIRECT,  ICMP_REDIRECT_NET },
 153         { "redir-host",         ICMP_REDIRECT,  ICMP_REDIRECT_HOST },
 154         { "redir-tos-net",      ICMP_REDIRECT,  ICMP_REDIRECT_TOSNET },
 155         { "redir-tos-host",     ICMP_REDIRECT,  ICMP_REDIRECT_TOSHOST },
 156         { "normal-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
 157         { "common-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
 158         { "transit",            ICMP_TIMXCEED,  ICMP_TIMXCEED_INTRANS },
 159         { "reassemb",           ICMP_TIMXCEED,  ICMP_TIMXCEED_REASS },
 160         { "badhead",            ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
 161         { "optmiss",            ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
 162         { "badlen",             ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
 163         { "unknown-ind",        ICMP_PHOTURIS,  ICMP_PHOTURIS_UNKNOWN_INDEX },
 164         { "auth-fail",          ICMP_PHOTURIS,  ICMP_PHOTURIS_AUTH_FAILED },
 165         { "decrypt-fail",       ICMP_PHOTURIS,  ICMP_PHOTURIS_DECRYPT_FAILED }
 166 };
 167
 168 static const struct icmpcodeent icmp6_code[] = {
 169         { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
 170         { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
 171         { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
 172         { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
 173         { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
 174         { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
 175         { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
 176         { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
 177         { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
 178         { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
 179         { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
 180         { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
 181 };
 182
 183 const struct pf_timeout pf_timeouts[] = {
 184         { "tcp.first",          PFTM_TCP_FIRST_PACKET },
 185         { "tcp.opening",        PFTM_TCP_OPENING },
 186         { "tcp.established",    PFTM_TCP_ESTABLISHED },
 187         { "tcp.closing",        PFTM_TCP_CLOSING },
 188         { "tcp.finwait",        PFTM_TCP_FIN_WAIT },
 189         { "tcp.closed",         PFTM_TCP_CLOSED },
 190         { "tcp.tsdiff",         PFTM_TS_DIFF },
 191         { "udp.first",          PFTM_UDP_FIRST_PACKET },
 192         { "udp.single",         PFTM_UDP_SINGLE },
 193         { "udp.multiple",       PFTM_UDP_MULTIPLE },
 194         { "icmp.first",         PFTM_ICMP_FIRST_PACKET },
 195         { "icmp.error",         PFTM_ICMP_ERROR_REPLY },
 196         { "other.first",        PFTM_OTHER_FIRST_PACKET },
 197         { "other.single",       PFTM_OTHER_SINGLE },
 198         { "other.multiple",     PFTM_OTHER_MULTIPLE },
 199         { "frag",               PFTM_FRAG },
 200         { "interval",           PFTM_INTERVAL },
 201         { "adaptive.start",     PFTM_ADAPTIVE_START },
 202         { "adaptive.end",       PFTM_ADAPTIVE_END },
 203         { "src.track",          PFTM_SRC_NODE },
 204         { NULL,                 0 }
 205 };
 206
 207 const struct icmptypeent *
 208 geticmptypebynumber(u_int8_t type, sa_family_t af)
 209 {
 210         unsigned int    i;
 211
 212         if (af != AF_INET6) {
 213                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 214                     i++) {
 215                         if (type == icmp_type[i].type)
 216                                 return (&icmp_type[i]);
 217                 }
 218         } else {
 219                 for (i=0; i < (sizeof (icmp6_type) /
 220                     sizeof(icmp6_type[0])); i++) {
 221                         if (type == icmp6_type[i].type)
 222                                  return (&icmp6_type[i]);
 223                 }
 224         }
 225         return (NULL);
 226 }
 227
 228 const struct icmptypeent *
 229 geticmptypebyname(char *w, sa_family_t af)
 230 {
 231         unsigned int    i;
 232
 233         if (af != AF_INET6) {
 234                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 235                     i++) {
 236                         if (!strcmp(w, icmp_type[i].name))
 237                                 return (&icmp_type[i]);
 238                 }
 239         } else {
 240                 for (i=0; i < (sizeof (icmp6_type) /
 241                     sizeof(icmp6_type[0])); i++) {
 242                         if (!strcmp(w, icmp6_type[i].name))
 243                                 return (&icmp6_type[i]);
 244                 }
 245         }
 246         return (NULL);
 247 }
 248
 249 const struct icmpcodeent *
 250 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
 251 {
 252         unsigned int    i;
 253
 254         if (af != AF_INET6) {
 255                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 256                     i++) {
 257                         if (type == icmp_code[i].type &&
 258                             code == icmp_code[i].code)
 259                                 return (&icmp_code[i]);
 260                 }
 261         } else {
 262                 for (i=0; i < (sizeof (icmp6_code) /
 263                     sizeof(icmp6_code[0])); i++) {
 264                         if (type == icmp6_code[i].type &&
 265                             code == icmp6_code[i].code)
 266                                 return (&icmp6_code[i]);
 267                 }
 268         }
 269         return (NULL);
 270 }
 271
 272 const struct icmpcodeent *
 273 geticmpcodebyname(u_long type, char *w, sa_family_t af)
 274 {
 275         unsigned int    i;
 276
 277         if (af != AF_INET6) {
 278                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 279                     i++) {
 280                         if (type == icmp_code[i].type &&
 281                             !strcmp(w, icmp_code[i].name))
 282                                 return (&icmp_code[i]);
 283                 }
 284         } else {
 285                 for (i=0; i < (sizeof (icmp6_code) /
 286                     sizeof(icmp6_code[0])); i++) {
 287                         if (type == icmp6_code[i].type &&
 288                             !strcmp(w, icmp6_code[i].name))
 289                                 return (&icmp6_code[i]);
 290                 }
 291         }
 292         return (NULL);
 293 }
 294
 295 void
 296 print_op(u_int8_t op, const char *a1, const char *a2)
 297 {
 298         if (op == PF_OP_IRG)
 299                 printf(" %s >< %s", a1, a2);
 300         else if (op == PF_OP_XRG)
 301                 printf(" %s <> %s", a1, a2);
 302         else if (op == PF_OP_EQ)
 303                 printf(" = %s", a1);
 304         else if (op == PF_OP_NE)
 305                 printf(" != %s", a1);
 306         else if (op == PF_OP_LT)
 307                 printf(" < %s", a1);
 308         else if (op == PF_OP_LE)
 309                 printf(" <= %s", a1);
 310         else if (op == PF_OP_GT)
 311                 printf(" > %s", a1);
 312         else if (op == PF_OP_GE)
 313                 printf(" >= %s", a1);
 314         else if (op == PF_OP_RRG)
 315                 printf(" %s:%s", a1, a2);
 316 }
 317
 318 void
 319 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto)
 320 {
 321         char             a1[6], a2[6];
 322         struct servent  *s;
 323
 324         s = getservbyport(p1, proto);
 325         p1 = ntohs(p1);
 326         p2 = ntohs(p2);
 327         snprintf(a1, sizeof(a1), "%u", p1);
 328         snprintf(a2, sizeof(a2), "%u", p2);
 329         printf(" port");
 330         if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
 331                 print_op(op, s->s_name, a2);
 332         else
 333                 print_op(op, a1, a2);
 334 }
 335
 336 void
 337 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
 338 {
 339         char    a1[11], a2[11];
 340
 341         snprintf(a1, sizeof(a1), "%u", u1);
 342         snprintf(a2, sizeof(a2), "%u", u2);
 343         printf(" %s", t);
 344         if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
 345                 print_op(op, "unknown", a2);
 346         else
 347                 print_op(op, a1, a2);
 348 }
 349
 350 void
 351 print_flags(u_int8_t f)
 352 {
 353         int     i;
 354
 355         for (i = 0; tcpflags[i]; ++i)
 356                 if (f & (1 << i))
 357                         printf("%c", tcpflags[i]);
 358 }
 359
 360 void
 361 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
 362     sa_family_t af, u_int8_t proto, int verbose)
 363 {
 364         char buf[PF_OSFP_LEN*3];
 365         if (src->addr.type == PF_ADDR_ADDRMASK &&
 366             dst->addr.type == PF_ADDR_ADDRMASK &&
 367             PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
 368             PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
 369             PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
 370             PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
 371             !src->neg && !dst->neg &&
 372             !src->port_op && !dst->port_op &&
 373             osfp == PF_OSFP_ANY)
 374                 printf(" all");
 375         else {
 376                 printf(" from ");
 377                 if (src->neg)
 378                         printf("! ");
 379                 print_addr(&src->addr, af, verbose);
 380                 if (src->port_op)
 381                         print_port(src->port_op, src->port[0],
 382                             src->port[1],
 383                             proto == IPPROTO_TCP ? "tcp" : "udp");
 384                 if (osfp != PF_OSFP_ANY)
 385                         printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
 386                             sizeof(buf)));
 387
 388                 printf(" to ");
 389                 if (dst->neg)
 390                         printf("! ");
 391                 print_addr(&dst->addr, af, verbose);
 392                 if (dst->port_op)
 393                         print_port(dst->port_op, dst->port[0],
 394                             dst->port[1],
 395                             proto == IPPROTO_TCP ? "tcp" : "udp");
 396         }
 397 }
 398
 399 void
 400 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
 401     sa_family_t af, int id)
 402 {
 403         struct pf_pooladdr      *pooladdr;
 404
 405         if ((TAILQ_FIRST(&pool->list) != NULL) &&
 406             TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 407                 printf("{ ");
 408         TAILQ_FOREACH(pooladdr, &pool->list, entries){
 409                 switch (id) {
 410                 case PF_NAT:
 411                 case PF_RDR:
 412                 case PF_BINAT:
 413                         print_addr(&pooladdr->addr, af, 0);
 414                         break;
 415                 case PF_PASS:
 416                         if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
 417                                 printf("%s", pooladdr->ifname);
 418                         else {
 419                                 printf("(%s ", pooladdr->ifname);
 420                                 print_addr(&pooladdr->addr, af, 0);
 421                                 printf(")");
 422                         }
 423                         break;
 424                 default:
 425                         break;
 426                 }
 427                 if (TAILQ_NEXT(pooladdr, entries) != NULL)
 428                         printf(", ");
 429                 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 430                         printf(" }");
 431         }
 432         switch (id) {
 433         case PF_NAT:
 434                 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
 435                     p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
 436                         if (p1 == p2)
 437                                 printf(" port %u", p1);
 438                         else
 439                                 printf(" port %u:%u", p1, p2);
 440                 }
 441                 break;
 442         case PF_RDR:
 443                 if (p1) {
 444                         printf(" port %u", p1);
 445                         if (p2 && (p2 != p1))
 446                                 printf(":%u", p2);
 447                 }
 448                 break;
 449         default:
 450                 break;
 451         }
 452         switch (pool->opts & PF_POOL_TYPEMASK) {
 453         case PF_POOL_NONE:
 454                 break;
 455         case PF_POOL_BITMASK:
 456                 printf(" bitmask");
 457                 break;
 458         case PF_POOL_RANDOM:
 459                 printf(" random");
 460                 break;
 461         case PF_POOL_SRCHASH:
 462                 printf(" source-hash 0x%08x%08x%08x%08x",
 463                     pool->key.key32[0], pool->key.key32[1],
 464                     pool->key.key32[2], pool->key.key32[3]);
 465                 break;
 466         case PF_POOL_ROUNDROBIN:
 467                 printf(" round-robin");
 468                 break;
 469         }
 470         if (pool->opts & PF_POOL_STICKYADDR)
 471                 printf(" sticky-address");
 472         if (id == PF_NAT && p1 == 0 && p2 == 0)
 473                 printf(" static-port");
 474 }
 475
 476 const char      *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
 477 const char      *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
 478 const char      *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
 479 const char      *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
 480
 481 void
 482 print_status(struct pf_status *s, int opts)
 483 {
 484         char                    statline[80];
 485         const char *running;
 486         time_t                  runtime;
 487         int                     i;
 488         char                    buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
 489         static const char       hex[] = "0123456789abcdef";
 490
 491         runtime = time(NULL) - s->since;
 492         running = s->running ? "Enabled" : "Disabled";
 493
 494         if (s->since) {
 495                 unsigned int    sec, min, hrs, day = runtime;
 496
 497                 sec = day % 60;
 498                 day /= 60;
 499                 min = day % 60;
 500                 day /= 60;
 501                 hrs = day % 24;
 502                 day /= 24;
 503                 snprintf(statline, sizeof(statline),
 504                     "Status: %s for %u days %.2u:%.2u:%.2u",
 505                     running, day, hrs, min, sec);
 506         } else
 507                 snprintf(statline, sizeof(statline), "Status: %s", running);
 508         printf("%-44s", statline);
 509         switch (s->debug) {
 510         case PF_DEBUG_NONE:
 511                 printf("%15s\n\n", "Debug: None");
 512                 break;
 513         case PF_DEBUG_URGENT:
 514                 printf("%15s\n\n", "Debug: Urgent");
 515                 break;
 516         case PF_DEBUG_MISC:
 517                 printf("%15s\n\n", "Debug: Misc");
 518                 break;
 519         case PF_DEBUG_NOISY:
 520                 printf("%15s\n\n", "Debug: Loud");
 521                 break;
 522         }
 523
 524         if (opts & PF_OPT_VERBOSE) {
 525                 printf("Hostid:   0x%08x\n", ntohl(s->hostid));
 526
 527                 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
 528                         buf[i + i] = hex[s->pf_chksum[i] >> 4];
 529                         buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
 530                 }
 531                 buf[i + i] = '\0';
 532                 printf("Checksum: 0x%s\n\n", buf);
 533         }
 534
 535         if (s->ifname[0] != 0) {
 536                 printf("Interface Stats for %-16s %5s %16s\n",
 537                     s->ifname, "IPv4", "IPv6");
 538                 printf("  %-25s %14llu %16llu\n", "Bytes In",
 539                     (unsigned long long)s->bcounters[0][0],
 540                     (unsigned long long)s->bcounters[1][0]);
 541                 printf("  %-25s %14llu %16llu\n", "Bytes Out",
 542                     (unsigned long long)s->bcounters[0][1],
 543                     (unsigned long long)s->bcounters[1][1]);
 544                 printf("  Packets In\n");
 545                 printf("    %-23s %14llu %16llu\n", "Passed",
 546                     (unsigned long long)s->pcounters[0][0][PF_PASS],
 547                     (unsigned long long)s->pcounters[1][0][PF_PASS]);
 548                 printf("    %-23s %14llu %16llu\n", "Blocked",
 549                     (unsigned long long)s->pcounters[0][0][PF_DROP],
 550                     (unsigned long long)s->pcounters[1][0][PF_DROP]);
 551                 printf("  Packets Out\n");
 552                 printf("    %-23s %14llu %16llu\n", "Passed",
 553                     (unsigned long long)s->pcounters[0][1][PF_PASS],
 554                     (unsigned long long)s->pcounters[1][1][PF_PASS]);
 555                 printf("    %-23s %14llu %16llu\n\n", "Blocked",
 556                     (unsigned long long)s->pcounters[0][1][PF_DROP],
 557                     (unsigned long long)s->pcounters[1][1][PF_DROP]);
 558         }
 559         printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
 560         printf("  %-25s %14u %14s\n", "current entries", s->states, "");
 561         for (i = 0; i < FCNT_MAX; i++) {
 562                 printf("  %-25s %14llu ", pf_fcounters[i],
 563                             (unsigned long long)s->fcounters[i]);
 564                 if (runtime > 0)
 565                         printf("%14.1f/s\n",
 566                             (double)s->fcounters[i] / (double)runtime);
 567                 else
 568                         printf("%14s\n", "");
 569         }
 570         if (opts & PF_OPT_VERBOSE) {
 571                 printf("Source Tracking Table\n");
 572                 printf("  %-25s %14u %14s\n", "current entries",
 573                     s->src_nodes, "");
 574                 for (i = 0; i < SCNT_MAX; i++) {
 575                         printf("  %-25s %14lld ", pf_scounters[i],
 576                                     (unsigned long long)s->scounters[i]);
 577                         if (runtime > 0)
 578                                 printf("%14.1f/s\n",
 579                                     (double)s->scounters[i] / (double)runtime);
 580                         else
 581                                 printf("%14s\n", "");
 582                 }
 583         }
 584         printf("Counters\n");
 585         for (i = 0; i < PFRES_MAX; i++) {
 586                 printf("  %-25s %14llu ", pf_reasons[i],
 587                     (unsigned long long)s->counters[i]);
 588                 if (runtime > 0)
 589                         printf("%14.1f/s\n",
 590                             (double)s->counters[i] / (double)runtime);
 591                 else
 592                         printf("%14s\n", "");
 593         }
 594         if (opts & PF_OPT_VERBOSE) {
 595                 printf("Limit Counters\n");
 596                 for (i = 0; i < LCNT_MAX; i++) {
 597                         printf("  %-25s %14ju ", pf_lcounters[i],
 598                                     (uintmax_t)s->lcounters[i]);
 599                         if (runtime > 0)
 600                                 printf("%14.1f/s\n",
 601                                     (double)s->lcounters[i] / (double)runtime);
 602                         else
 603                                 printf("%14s\n", "");
 604                 }
 605         }
 606 }
 607
 608 void
 609 print_src_node(struct pf_src_node *sn, int opts)
 610 {
 611         struct pf_addr_wrap aw;
 612         int min, sec;
 613
 614         memset(&aw, 0, sizeof(aw));
 615         if (sn->af == AF_INET)
 616                 aw.v.a.mask.addr32[0] = 0xffffffff;
 617         else
 618                 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
 619
 620         aw.v.a.addr = sn->addr;
 621         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 622         printf(" -> ");
 623         aw.v.a.addr = sn->raddr;
 624         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 625         printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
 626             sn->conn, sn->conn_rate.count / 1000,
 627             (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
 628         if (opts & PF_OPT_VERBOSE) {
 629                 sec = sn->creation % 60;
 630                 sn->creation /= 60;
 631                 min = sn->creation % 60;
 632                 sn->creation /= 60;
 633                 printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
 634                 if (sn->states == 0) {
 635                         sec = sn->expire % 60;
 636                         sn->expire /= 60;
 637                         min = sn->expire % 60;
 638                         sn->expire /= 60;
 639                         printf(", expires in %.2u:%.2u:%.2u",
 640                             sn->expire, min, sec);
 641                 }
 642                 printf(", %ju pkts, %ju bytes",
 643                     (uintmax_t)sn->packets[0] + sn->packets[1],
 644                     (uintmax_t)sn->bytes[0] + sn->bytes[1]);
 645                 switch (sn->ruletype) {
 646                 case PF_NAT:
 647                         if (sn->rule.nr != (uint32_t)(-1))
 648                                 printf(", nat rule %u", sn->rule.nr);
 649                         break;
 650                 case PF_RDR:
 651                         if (sn->rule.nr != (uint32_t)(-1))
 652                                 printf(", rdr rule %u", sn->rule.nr);
 653                         break;
 654                 case PF_PASS:
 655                         if (sn->rule.nr != (uint32_t)(-1))
 656                                 printf(", filter rule %u", sn->rule.nr);
 657                         break;
 658                 }
 659                 printf("\n");
 660         }
 661 }
 662
 663 void
 664 print_rule(struct pf_rule *r, const char *anchor_call, int verbose)
 665 {
 666         static const char *actiontypes[] = { "pass", "block", "scrub",
 667             "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
 668         static const char *anchortypes[] = { "anchor", "anchor", "anchor",
 669             "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
 670             "binat-anchor", "rdr-anchor", "rdr-anchor" };
 671         int     i, opts;
 672
 673         if (verbose)
 674                 printf("@%d ", r->nr);
 675         if (r->action > PF_NORDR)
 676                 printf("action(%d)", r->action);
 677         else if (anchor_call[0]) {
 678                 if (anchor_call[0] == '_') {
 679                         printf("%s", anchortypes[r->action]);
 680                 } else
 681                         printf("%s \"%s\"", anchortypes[r->action],
 682                             anchor_call);
 683         } else {
 684                 printf("%s", actiontypes[r->action]);
 685                 if (r->natpass)
 686                         printf(" pass");
 687         }
 688         if (r->action == PF_DROP) {
 689                 if (r->rule_flag & PFRULE_RETURN)
 690                         printf(" return");
 691                 else if (r->rule_flag & PFRULE_RETURNRST) {
 692                         if (!r->return_ttl)
 693                                 printf(" return-rst");
 694                         else
 695                                 printf(" return-rst(ttl %d)", r->return_ttl);
 696                 } else if (r->rule_flag & PFRULE_RETURNICMP) {
 697                         const struct icmpcodeent        *ic, *ic6;
 698
 699                         ic = geticmpcodebynumber(r->return_icmp >> 8,
 700                             r->return_icmp & 255, AF_INET);
 701                         ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
 702                             r->return_icmp6 & 255, AF_INET6);
 703
 704                         switch (r->af) {
 705                         case AF_INET:
 706                                 printf(" return-icmp");
 707                                 if (ic == NULL)
 708                                         printf("(%u)", r->return_icmp & 255);
 709                                 else
 710                                         printf("(%s)", ic->name);
 711                                 break;
 712                         case AF_INET6:
 713                                 printf(" return-icmp6");
 714                                 if (ic6 == NULL)
 715                                         printf("(%u)", r->return_icmp6 & 255);
 716                                 else
 717                                         printf("(%s)", ic6->name);
 718                                 break;
 719                         default:
 720                                 printf(" return-icmp");
 721                                 if (ic == NULL)
 722                                         printf("(%u, ", r->return_icmp & 255);
 723                                 else
 724                                         printf("(%s, ", ic->name);
 725                                 if (ic6 == NULL)
 726                                         printf("%u)", r->return_icmp6 & 255);
 727                                 else
 728                                         printf("%s)", ic6->name);
 729                                 break;
 730                         }
 731                 } else
 732                         printf(" drop");
 733         }
 734         if (r->direction == PF_IN)
 735                 printf(" in");
 736         else if (r->direction == PF_OUT)
 737                 printf(" out");
 738         if (r->log) {
 739                 printf(" log");
 740                 if (r->log & ~PF_LOG || r->logif) {
 741                         int count = 0;
 742
 743                         printf(" (");
 744                         if (r->log & PF_LOG_ALL)
 745                                 printf("%sall", count++ ? ", " : "");
 746                         if (r->log & PF_LOG_SOCKET_LOOKUP)
 747                                 printf("%suser", count++ ? ", " : "");
 748                         if (r->logif)
 749                                 printf("%sto pflog%u", count++ ? ", " : "",
 750                                     r->logif);
 751                         printf(")");
 752                 }
 753         }
 754         if (r->quick)
 755                 printf(" quick");
 756         if (r->ifname[0]) {
 757                 if (r->ifnot)
 758                         printf(" on ! %s", r->ifname);
 759                 else
 760                         printf(" on %s", r->ifname);
 761         }
 762         if (r->rt) {
 763                 if (r->rt == PF_ROUTETO)
 764                         printf(" route-to");
 765                 else if (r->rt == PF_REPLYTO)
 766                         printf(" reply-to");
 767                 else if (r->rt == PF_DUPTO)
 768                         printf(" dup-to");
 769                 else if (r->rt == PF_FASTROUTE)
 770                         printf(" fastroute");
 771                 if (r->rt != PF_FASTROUTE) {
 772                         printf(" ");
 773                         print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
 774                 }
 775         }
 776         if (r->af) {
 777                 if (r->af == AF_INET)
 778                         printf(" inet");
 779                 else
 780                         printf(" inet6");
 781         }
 782         if (r->proto) {
 783                 struct protoent *p;
 784
 785                 if ((p = getprotobynumber(r->proto)) != NULL)
 786                         printf(" proto %s", p->p_name);
 787                 else
 788                         printf(" proto %u", r->proto);
 789         }
 790         print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
 791             verbose);
 792         if (r->uid.op)
 793                 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
 794                     UID_MAX);
 795         if (r->gid.op)
 796                 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
 797                     GID_MAX);
 798         if (r->flags || r->flagset) {
 799                 printf(" flags ");
 800                 print_flags(r->flags);
 801                 printf("/");
 802                 print_flags(r->flagset);
 803         } else if (r->action == PF_PASS &&
 804             (!r->proto || r->proto == IPPROTO_TCP) &&
 805             !(r->rule_flag & PFRULE_FRAGMENT) &&
 806             !anchor_call[0] && r->keep_state)
 807                 printf(" flags any");
 808         if (r->type) {
 809                 const struct icmptypeent        *it;
 810
 811                 it = geticmptypebynumber(r->type-1, r->af);
 812                 if (r->af != AF_INET6)
 813                         printf(" icmp-type");
 814                 else
 815                         printf(" icmp6-type");
 816                 if (it != NULL)
 817                         printf(" %s", it->name);
 818                 else
 819                         printf(" %u", r->type-1);
 820                 if (r->code) {
 821                         const struct icmpcodeent        *ic;
 822
 823                         ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
 824                         if (ic != NULL)
 825                                 printf(" code %s", ic->name);
 826                         else
 827                                 printf(" code %u", r->code-1);
 828                 }
 829         }
 830         if (r->tos)
 831                 printf(" tos 0x%2.2x", r->tos);
 832         if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
 833                 printf(" no state");
 834         else if (r->keep_state == PF_STATE_NORMAL)
 835                 printf(" keep state");
 836         else if (r->keep_state == PF_STATE_MODULATE)
 837                 printf(" modulate state");
 838         else if (r->keep_state == PF_STATE_SYNPROXY)
 839                 printf(" synproxy state");
 840         if (r->prob) {
 841                 char    buf[20];
 842
 843                 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
 844                 for (i = strlen(buf)-1; i > 0; i--) {
 845                         if (buf[i] == '0')
 846                                 buf[i] = '\0';
 847                         else {
 848                                 if (buf[i] == '.')
 849                                         buf[i] = '\0';
 850                                 break;
 851                         }
 852                 }
 853                 printf(" probability %s%%", buf);
 854         }
 855         opts = 0;
 856         if (r->max_states || r->max_src_nodes || r->max_src_states)
 857                 opts = 1;
 858         if (r->pickup_mode)
 859                 opts = 1;
 860         if (r->rule_flag & PFRULE_NOSYNC)
 861                 opts = 1;
 862         if (r->rule_flag & PFRULE_SRCTRACK)
 863                 opts = 1;
 864         if (r->rule_flag & PFRULE_IFBOUND)
 865                 opts = 1;
 866         if (r->rule_flag & PFRULE_STATESLOPPY)
 867                 opts = 1;
 868         for (i = 0; !opts && i < PFTM_MAX; ++i)
 869                 if (r->timeout[i])
 870                         opts = 1;
 871         if (opts) {
 872                 printf(" (");
 873                 switch(r->pickup_mode) {
 874                 case PF_PICKUPS_UNSPECIFIED:
 875                         break;
 876                 case PF_PICKUPS_DISABLED:
 877                         printf("no-pickups");
 878                         opts = 0;
 879                         break;
 880                 case PF_PICKUPS_HASHONLY:
 881                         printf("hash-only");
 882                         opts = 0;
 883                         break;
 884                 case PF_PICKUPS_ENABLED:
 885                         printf("pickups");
 886                         opts = 0;
 887                         break;
 888                 default:
 889                         printf("unknown-pickups-mode-%d", r->pickup_mode);
 890                         break;
 891                 }
 892                 if (r->max_states) {
 893                         if (!opts)
 894                                 printf(", ");
 895                         printf("max %u", r->max_states);
 896                         opts = 0;
 897                 }
 898                 if (r->rule_flag & PFRULE_NOSYNC) {
 899                         if (!opts)
 900                                 printf(", ");
 901                         printf("no-sync");
 902                         opts = 0;
 903                 }
 904                 if (r->rule_flag & PFRULE_SRCTRACK) {
 905                         if (!opts)
 906                                 printf(", ");
 907                         printf("source-track");
 908                         if (r->rule_flag & PFRULE_RULESRCTRACK)
 909                                 printf(" rule");
 910                         else
 911                                 printf(" global");
 912                         opts = 0;
 913                 }
 914                 if (r->max_src_states) {
 915                         if (!opts)
 916                                 printf(", ");
 917                         printf("max-src-states %u", r->max_src_states);
 918                         opts = 0;
 919                 }
 920                 if (r->max_src_conn) {
 921                         if (!opts)
 922                                 printf(", ");
 923                         printf("max-src-conn %u", r->max_src_conn);
 924                         opts = 0;
 925                 }
 926                 if (r->max_src_conn_rate.limit) {
 927                         if (!opts)
 928                                 printf(", ");
 929                         printf("max-src-conn-rate %u/%u",
 930                             r->max_src_conn_rate.limit,
 931                             r->max_src_conn_rate.seconds);
 932                         opts = 0;
 933                 }
 934                 if (r->max_src_nodes) {
 935                         if (!opts)
 936                                 printf(", ");
 937                         printf("max-src-nodes %u", r->max_src_nodes);
 938                         opts = 0;
 939                 }
 940                 if (r->overload_tblname[0]) {
 941                         if (!opts)
 942                                 printf(", ");
 943                         printf("overload <%s>", r->overload_tblname);
 944                         if (r->flush)
 945                                 printf(" flush");
 946                         if (r->flush & PF_FLUSH_GLOBAL)
 947                                 printf(" global");
 948                 }
 949                 if (r->rule_flag & PFRULE_IFBOUND) {
 950                         if (!opts)
 951                                 printf(", ");
 952                         printf("if-bound");
 953                         opts = 0;
 954                 }
 955                 if (r->rule_flag & PFRULE_STATESLOPPY) {
 956                         if (!opts)
 957                                 printf(", ");
 958                         printf("sloppy");
 959                         opts = 0;
 960                 }
 961                 for (i = 0; i < PFTM_MAX; ++i)
 962                         if (r->timeout[i]) {
 963                                 int j;
 964
 965                                 if (!opts)
 966                                         printf(", ");
 967                                 opts = 0;
 968                                 for (j = 0; pf_timeouts[j].name != NULL;
 969                                     ++j)
 970                                         if (pf_timeouts[j].timeout == i)
 971                                                 break;
 972                                 printf("%s %u", pf_timeouts[j].name == NULL ?
 973                                     "inv.timeout" : pf_timeouts[j].name,
 974                                     r->timeout[i]);
 975                         }
 976                 printf(")");
 977         }
 978         if (r->rule_flag & PFRULE_FRAGMENT)
 979                 printf(" fragment");
 980         if (r->rule_flag & PFRULE_NODF)
 981                 printf(" no-df");
 982         if (r->rule_flag & PFRULE_RANDOMID)
 983                 printf(" random-id");
 984         if (r->min_ttl)
 985                 printf(" min-ttl %d", r->min_ttl);
 986         if (r->max_mss)
 987                 printf(" max-mss %d", r->max_mss);
 988         if (r->rule_flag & PFRULE_SET_TOS)
 989                 printf(" set-tos 0x%2.2x", r->set_tos);
 990         if (r->allow_opts)
 991                 printf(" allow-opts");
 992         if (r->action == PF_SCRUB) {
 993                 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
 994                         printf(" reassemble tcp");
 995
 996                 if (r->rule_flag & PFRULE_FRAGDROP)
 997                         printf(" fragment drop-ovl");
 998                 else if (r->rule_flag & PFRULE_FRAGCROP)
 999                         printf(" fragment crop");
1000                 else
1001                         printf(" fragment reassemble");
1002         }
1003         if (r->label[0])
1004                 printf(" label \"%s\"", r->label);
1005         if (r->qname[0] && r->pqname[0])
1006                 printf(" queue(%s, %s)", r->qname, r->pqname);
1007         else if (r->qname[0])
1008                 printf(" queue %s", r->qname);
1009         if (r->tagname[0])
1010                 printf(" tag %s", r->tagname);
1011         if (r->match_tagname[0]) {
1012                 if (r->match_tag_not)
1013                         printf(" !");
1014                 printf(" tagged %s", r->match_tagname);
1015         }
1016         if (r->rtableid != -1)
1017                 printf(" rtable %u", r->rtableid);
1018         if (r->divert.port) {
1019                 if (PF_AZERO(&r->divert.addr, r->af)) {
1020                         printf(" divert-reply");
1021                 } else {
1022                         /* XXX cut&paste from print_addr */
1023                         char buf[48];
1024
1025                         printf(" divert-to ");
1026                         if (inet_ntop(r->af, &r->divert.addr, buf,
1027                             sizeof(buf)) == NULL)
1028                                 printf("?");
1029                         else
1030                                 printf("%s", buf);
1031                         printf(" port %u", ntohs(r->divert.port));
1032                 }
1033         }
1034         if (!anchor_call[0] && (r->action == PF_NAT ||
1035             r->action == PF_BINAT || r->action == PF_RDR)) {
1036                 printf(" -> ");
1037                 print_pool(&r->rpool, r->rpool.proxy_port[0],
1038                     r->rpool.proxy_port[1], r->af, r->action);
1039         }
1040 }
1041
1042 void
1043 print_tabledef(const char *name, int flags, int addrs,
1044     struct node_tinithead *nodes)
1045 {
1046         struct node_tinit       *ti, *nti;
1047         struct node_host        *h;
1048
1049         printf("table <%s>", name);
1050         if (flags & PFR_TFLAG_CONST)
1051                 printf(" const");
1052         if (flags & PFR_TFLAG_PERSIST)
1053                 printf(" persist");
1054         if (flags & PFR_TFLAG_COUNTERS)
1055                 printf(" counters");
1056         SIMPLEQ_FOREACH(ti, nodes, entries) {
1057                 if (ti->file) {
1058                         printf(" file \"%s\"", ti->file);
1059                         continue;
1060                 }
1061                 printf(" {");
1062                 for (;;) {
1063                         for (h = ti->host; h != NULL; h = h->next) {
1064                                 printf(h->not ? " !" : " ");
1065                                 print_addr(&h->addr, h->af, 0);
1066                         }
1067                         nti = SIMPLEQ_NEXT(ti, entries);
1068                         if (nti != NULL && nti->file == NULL)
1069                                 ti = nti;       /* merge lists */
1070                         else
1071                                 break;
1072                 }
1073                 printf(" }");
1074         }
1075         if (addrs && SIMPLEQ_EMPTY(nodes))
1076                 printf(" { }");
1077         printf("\n");
1078 }
1079
1080 int
1081 parse_flags(const char *s)
1082 {
1083         const char      *p, *q;
1084         u_int8_t         f = 0;
1085
1086         for (p = s; *p; p++) {
1087                 if ((q = strchr(tcpflags, *p)) == NULL)
1088                         return -1;
1089                 else
1090                         f |= 1 << (q - tcpflags);
1091         }
1092         return (f ? f : PF_TH_ALL);
1093 }
1094
1095 void
1096 set_ipmask(struct node_host *h, u_int8_t b)
1097 {
1098         struct pf_addr  *m, *n;
1099         int              i, j = 0;
1100
1101         m = &h->addr.v.a.mask;
1102         memset(m, 0, sizeof(*m));
1103
1104         while (b >= 32) {
1105                 m->addr32[j++] = 0xffffffff;
1106                 b -= 32;
1107         }
1108         for (i = 31; i > 31-b; --i)
1109                 m->addr32[j] |= (1 << i);
1110         if (b)
1111                 m->addr32[j] = htonl(m->addr32[j]);
1112
1113         /* Mask off bits of the address that will never be used. */
1114         n = &h->addr.v.a.addr;
1115         if (h->addr.type == PF_ADDR_ADDRMASK)
1116                 for (i = 0; i < 4; i++)
1117                         n->addr32[i] = n->addr32[i] & m->addr32[i];
1118 }
1119
1120 int
1121 check_netmask(struct node_host *h, sa_family_t af)
1122 {
1123         struct node_host        *n = NULL;
1124         struct pf_addr  *m;
1125
1126         for (n = h; n != NULL; n = n->next) {
1127                 if (h->addr.type == PF_ADDR_TABLE)
1128                         continue;
1129                 m = &h->addr.v.a.mask;
1130                 /* fix up netmask for dynaddr */
1131                 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1132                     unmask(m, AF_INET6) > 32)
1133                         set_ipmask(n, 32);
1134                 /* netmasks > 32 bit are invalid on v4 */
1135                 if (af == AF_INET &&
1136                     (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1137                         fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1138                             unmask(m, AF_INET6));
1139                         return (1);
1140                 }
1141         }
1142         return (0);
1143 }
1144
1145 /* interface lookup routines */
1146
1147 struct node_host        *iftab;
1148
1149 void
1150 ifa_load(void)
1151 {
1152         struct ifaddrs          *ifap, *ifa;
1153         struct node_host        *n = NULL, *h = NULL;
1154
1155         if (getifaddrs(&ifap) < 0)
1156                 err(1, "getifaddrs");
1157
1158         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1159                 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1160                     ifa->ifa_addr->sa_family == AF_INET6 ||
1161                     ifa->ifa_addr->sa_family == AF_LINK))
1162                                 continue;
1163                 n = calloc(1, sizeof(struct node_host));
1164                 if (n == NULL)
1165                         err(1, "address: calloc");
1166                 n->af = ifa->ifa_addr->sa_family;
1167                 n->ifa_flags = ifa->ifa_flags;
1168 #ifdef __KAME__
1169                 if (n->af == AF_INET6 &&
1170                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1171                     ifa->ifa_addr)->sin6_addr) &&
1172                     ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1173                     0) {
1174                         struct sockaddr_in6     *sin6;
1175
1176                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1177                         sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1178                             sin6->sin6_addr.s6_addr[3];
1179                         sin6->sin6_addr.s6_addr[2] = 0;
1180                         sin6->sin6_addr.s6_addr[3] = 0;
1181                 }
1182 #endif
1183                 n->ifindex = 0;
1184                 if (n->af == AF_INET) {
1185                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1186                             ifa->ifa_addr)->sin_addr.s_addr,
1187                             sizeof(struct in_addr));
1188                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1189                             ifa->ifa_netmask)->sin_addr.s_addr,
1190                             sizeof(struct in_addr));
1191                         if (ifa->ifa_broadaddr != NULL)
1192                                 memcpy(&n->bcast, &((struct sockaddr_in *)
1193                                     ifa->ifa_broadaddr)->sin_addr.s_addr,
1194                                     sizeof(struct in_addr));
1195                         if (ifa->ifa_dstaddr != NULL)
1196                                 memcpy(&n->peer, &((struct sockaddr_in *)
1197                                     ifa->ifa_dstaddr)->sin_addr.s_addr,
1198                                     sizeof(struct in_addr));
1199                 } else if (n->af == AF_INET6) {
1200                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1201                             ifa->ifa_addr)->sin6_addr.s6_addr,
1202                             sizeof(struct in6_addr));
1203                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1204                             ifa->ifa_netmask)->sin6_addr.s6_addr,
1205                             sizeof(struct in6_addr));
1206                         if (ifa->ifa_broadaddr != NULL)
1207                                 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1208                                     ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1209                                     sizeof(struct in6_addr));
1210                         if (ifa->ifa_dstaddr != NULL)
1211                                  memcpy(&n->peer, &((struct sockaddr_in6 *)
1212                                     ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1213                                     sizeof(struct in6_addr));
1214                         n->ifindex = ((struct sockaddr_in6 *)
1215                             ifa->ifa_addr)->sin6_scope_id;
1216                 }
1217                 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1218                         err(1, "ifa_load: strdup");
1219                 n->next = NULL;
1220                 n->tail = n;
1221                 if (h == NULL)
1222                         h = n;
1223                 else {
1224                         h->tail->next = n;
1225                         h->tail = n;
1226                 }
1227         }
1228
1229         iftab = h;
1230         freeifaddrs(ifap);
1231 }
1232
1233 struct node_host *
1234 ifa_exists(const char *ifa_name)
1235 {
1236         struct node_host        *n;
1237         struct ifgroupreq       ifgr;
1238         int                     s;
1239
1240         if (iftab == NULL)
1241                 ifa_load();
1242
1243         /* check wether this is a group */
1244         if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1245                 err(1, "socket");
1246         bzero(&ifgr, sizeof(ifgr));
1247         strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1248         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1249                 /* fake a node_host */
1250                 if ((n = calloc(1, sizeof(*n))) == NULL)
1251                         err(1, "calloc");
1252                 if ((n->ifname = strdup(ifa_name)) == NULL)
1253                         err(1, "strdup");
1254                 close(s);
1255                 return (n);
1256         }
1257         close(s);
1258
1259         for (n = iftab; n; n = n->next) {
1260                 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1261                         return (n);
1262         }
1263
1264         return (NULL);
1265 }
1266
1267 struct node_host *
1268 ifa_grouplookup(const char *ifa_name, int flags)
1269 {
1270         struct ifg_req          *ifg;
1271         struct ifgroupreq        ifgr;
1272         int                      s;
1273         size_t          len;
1274         struct node_host        *n, *h = NULL;
1275
1276         if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1277                 err(1, "socket");
1278         bzero(&ifgr, sizeof(ifgr));
1279         strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1280         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1281                 close(s);
1282                 return (NULL);
1283         }
1284
1285         len = ifgr.ifgr_len;
1286         if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1287                 err(1, "calloc");
1288         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1289                 err(1, "SIOCGIFGMEMB");
1290
1291         for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1292             ifg++) {
1293                 len -= sizeof(struct ifg_req);
1294                 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1295                         continue;
1296                 if (h == NULL)
1297                         h = n;
1298                 else {
1299                         h->tail->next = n;
1300                         h->tail = n->tail;
1301                 }
1302         }
1303         free(ifgr.ifgr_groups);
1304         close(s);
1305
1306         return (h);
1307 }
1308
1309 struct node_host *
1310 ifa_lookup(const char *ifa_name, int flags)
1311 {
1312         struct node_host        *p = NULL, *h = NULL, *n = NULL;
1313         int                      got4 = 0, got6 = 0;
1314         const char               *last_if = NULL;
1315
1316         if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1317                 return (h);
1318
1319         if (!strncmp(ifa_name, "self", IFNAMSIZ))
1320                 ifa_name = NULL;
1321
1322         if (iftab == NULL)
1323                 ifa_load();
1324
1325         for (p = iftab; p; p = p->next) {
1326                 if (ifa_skip_if(ifa_name, p))
1327                         continue;
1328                 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1329                         continue;
1330                 if ((flags & PFI_AFLAG_BROADCAST) &&
1331                     !(p->ifa_flags & IFF_BROADCAST))
1332                         continue;
1333                 if ((flags & PFI_AFLAG_PEER) &&
1334                     !(p->ifa_flags & IFF_POINTOPOINT))
1335                         continue;
1336                 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1337                         continue;
1338                 if (last_if == NULL || strcmp(last_if, p->ifname))
1339                         got4 = got6 = 0;
1340                 last_if = p->ifname;
1341                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1342                         continue;
1343                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1344                         continue;
1345                 if (p->af == AF_INET)
1346                         got4 = 1;
1347                 else
1348                         got6 = 1;
1349                 n = calloc(1, sizeof(struct node_host));
1350                 if (n == NULL)
1351                         err(1, "address: calloc");
1352                 n->af = p->af;
1353                 if (flags & PFI_AFLAG_BROADCAST)
1354                         memcpy(&n->addr.v.a.addr, &p->bcast,
1355                             sizeof(struct pf_addr));
1356                 else if (flags & PFI_AFLAG_PEER)
1357                         memcpy(&n->addr.v.a.addr, &p->peer,
1358                             sizeof(struct pf_addr));
1359                 else
1360                         memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1361                             sizeof(struct pf_addr));
1362                 if (flags & PFI_AFLAG_NETWORK)
1363                         set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1364                 else {
1365                         if (n->af == AF_INET) {
1366                                 if (p->ifa_flags & IFF_LOOPBACK &&
1367                                     p->ifa_flags & IFF_LINK1)
1368                                         memcpy(&n->addr.v.a.mask,
1369                                             &p->addr.v.a.mask,
1370                                             sizeof(struct pf_addr));
1371                                 else
1372                                         set_ipmask(n, 32);
1373                         } else
1374                                 set_ipmask(n, 128);
1375                 }
1376                 n->ifindex = p->ifindex;
1377
1378                 n->next = NULL;
1379                 n->tail = n;
1380                 if (h == NULL)
1381                         h = n;
1382                 else {
1383                         h->tail->next = n;
1384                         h->tail = n;
1385                 }
1386         }
1387         return (h);
1388 }
1389
1390 int
1391 ifa_skip_if(const char *filter, struct node_host *p)
1392 {
1393         int     n;
1394
1395         if (p->af != AF_INET && p->af != AF_INET6)
1396                 return (1);
1397         if (filter == NULL || !*filter)
1398                 return (0);
1399         if (!strcmp(p->ifname, filter))
1400                 return (0);     /* exact match */
1401         n = strlen(filter);
1402         if (n < 1 || n >= IFNAMSIZ)
1403                 return (1);     /* sanity check */
1404         if (filter[n-1] >= '0' && filter[n-1] <= '9')
1405                 return (1);     /* only do exact match in that case */
1406         if (strncmp(p->ifname, filter, n))
1407                 return (1);     /* prefix doesn't match */
1408         return (p->ifname[n] < '0' || p->ifname[n] > '9');
1409 }
1410
1411
1412 struct node_host *
1413 host(const char *s)
1414 {
1415         struct node_host        *h = NULL;
1416         int                      mask, v4mask, v6mask, cont = 1;
1417         char                    *p, *q, *ps;
1418
1419         if ((p = strrchr(s, '/')) != NULL) {
1420                 mask = strtol(p+1, &q, 0);
1421                 if (!q || *q || mask > 128 || q == (p+1)) {
1422                         fprintf(stderr, "invalid netmask '%s'\n", p);
1423                         return (NULL);
1424                 }
1425                 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1426                         err(1, "host: malloc");
1427                 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1428                 v4mask = v6mask = mask;
1429         } else {
1430                 if ((ps = strdup(s)) == NULL)
1431                         err(1, "host: strdup");
1432                 v4mask = 32;
1433                 v6mask = 128;
1434                 mask = -1;
1435         }
1436
1437         /* interface with this name exists? */
1438         if (cont && (h = host_if(ps, mask)) != NULL)
1439                 cont = 0;
1440
1441         /* IPv4 address? */
1442         if (cont && (h = host_v4(s)) != NULL)
1443                 cont = 0;
1444
1445         /* IPv6 address? */
1446         if (cont && (h = host_v6(ps, v6mask)) != NULL)
1447                 cont = 0;
1448
1449         /* dns lookup */
1450         if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1451                 cont = 0;
1452         free(ps);
1453
1454         if (h == NULL || cont == 1) {
1455                 fprintf(stderr, "no IP address found for %s\n", s);
1456                 return (NULL);
1457         }
1458         return (h);
1459 }
1460
1461 struct node_host *
1462 host_if(const char *s, int mask)
1463 {
1464         struct node_host        *n, *h = NULL;
1465         char                    *p, *ps;
1466         int                      flags = 0;
1467
1468         if ((ps = strdup(s)) == NULL)
1469                 err(1, "host_if: strdup");
1470         while ((p = strrchr(ps, ':')) != NULL) {
1471                 if (!strcmp(p+1, "network"))
1472                         flags |= PFI_AFLAG_NETWORK;
1473                 else if (!strcmp(p+1, "broadcast"))
1474                         flags |= PFI_AFLAG_BROADCAST;
1475                 else if (!strcmp(p+1, "peer"))
1476                         flags |= PFI_AFLAG_PEER;
1477                 else if (!strcmp(p+1, "0"))
1478                         flags |= PFI_AFLAG_NOALIAS;
1479                 else {
1480                         free(ps);
1481                         return (NULL);
1482                 }
1483                 *p = '\0';
1484         }
1485         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1486                 fprintf(stderr, "illegal combination of interface modifiers\n");
1487                 free(ps);
1488                 return (NULL);
1489         }
1490         if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1491                 fprintf(stderr, "network or broadcast lookup, but "
1492                     "extra netmask given\n");
1493                 free(ps);
1494                 return (NULL);
1495         }
1496         if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1497                 /* interface with this name exists */
1498                 h = ifa_lookup(ps, flags);
1499                 for (n = h; n != NULL && mask > -1; n = n->next)
1500                         set_ipmask(n, mask);
1501         }
1502
1503         free(ps);
1504         return (h);
1505 }
1506
1507 static struct node_host *
1508 host_v4(const char *s)
1509 {
1510         struct node_host        *h = NULL;
1511         struct in_addr           ina;
1512         int                      bits = 32;
1513
1514         memset(&ina, 0, sizeof(struct in_addr));
1515         if (strrchr(s, '/') != NULL) {
1516                 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1517                         return (NULL);
1518         } else {
1519                 if (inet_pton(AF_INET, s, &ina) != 1)
1520                         return (NULL);
1521         }
1522
1523         h = calloc(1, sizeof(struct node_host));
1524         if (h == NULL)
1525                 err(1, "address: calloc");
1526         h->ifname = NULL;
1527         h->af = AF_INET;
1528         h->addr.v.a.addr.addr32[0] = ina.s_addr;
1529         set_ipmask(h, bits);
1530         h->next = NULL;
1531         h->tail = h;
1532
1533         return (h);
1534 }
1535
1536 struct node_host *
1537 host_v6(const char *s, int mask)
1538 {
1539         struct addrinfo          hints, *res;
1540         struct node_host        *h = NULL;
1541
1542         memset(&hints, 0, sizeof(hints));
1543         hints.ai_family = AF_INET6;
1544         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1545         hints.ai_flags = AI_NUMERICHOST;
1546         if (getaddrinfo(s, "0", &hints, &res) == 0) {
1547                 h = calloc(1, sizeof(struct node_host));
1548                 if (h == NULL)
1549                         err(1, "address: calloc");
1550                 h->ifname = NULL;
1551                 h->af = AF_INET6;
1552                 memcpy(&h->addr.v.a.addr,
1553                     &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1554                     sizeof(h->addr.v.a.addr));
1555                 h->ifindex =
1556                     ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1557                 set_ipmask(h, mask);
1558                 freeaddrinfo(res);
1559                 h->next = NULL;
1560                 h->tail = h;
1561         }
1562
1563         return (h);
1564 }
1565
1566 struct node_host *
1567 host_dns(const char *s, int v4mask, int v6mask)
1568 {
1569         struct addrinfo          hints, *res0, *res;
1570         struct node_host        *n, *h = NULL;
1571         int                      error, noalias = 0;
1572         int                      got4 = 0, got6 = 0;
1573         char                    *p, *ps;
1574
1575         if ((ps = strdup(s)) == NULL)
1576                 err(1, "host_dns: strdup");
1577         if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1578                 noalias = 1;
1579                 *p = '\0';
1580         }
1581         memset(&hints, 0, sizeof(hints));
1582         hints.ai_family = PF_UNSPEC;
1583         hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1584         error = getaddrinfo(ps, NULL, &hints, &res0);
1585         if (error) {
1586                 free(ps);
1587                 return (h);
1588         }
1589
1590         for (res = res0; res; res = res->ai_next) {
1591                 if (res->ai_family != AF_INET &&
1592                     res->ai_family != AF_INET6)
1593                         continue;
1594                 if (noalias) {
1595                         if (res->ai_family == AF_INET) {
1596                                 if (got4)
1597                                         continue;
1598                                 got4 = 1;
1599                         } else {
1600                                 if (got6)
1601                                         continue;
1602                                 got6 = 1;
1603                         }
1604                 }
1605                 n = calloc(1, sizeof(struct node_host));
1606                 if (n == NULL)
1607                         err(1, "host_dns: calloc");
1608                 n->ifname = NULL;
1609                 n->af = res->ai_family;
1610                 if (res->ai_family == AF_INET) {
1611                         memcpy(&n->addr.v.a.addr,
1612                             &((struct sockaddr_in *)
1613                             res->ai_addr)->sin_addr.s_addr,
1614                             sizeof(struct in_addr));
1615                         set_ipmask(n, v4mask);
1616                 } else {
1617                         memcpy(&n->addr.v.a.addr,
1618                             &((struct sockaddr_in6 *)
1619                             res->ai_addr)->sin6_addr.s6_addr,
1620                             sizeof(struct in6_addr));
1621                         n->ifindex =
1622                             ((struct sockaddr_in6 *)
1623                             res->ai_addr)->sin6_scope_id;
1624                         set_ipmask(n, v6mask);
1625                 }
1626                 n->next = NULL;
1627                 n->tail = n;
1628                 if (h == NULL)
1629                         h = n;
1630                 else {
1631                         h->tail->next = n;
1632                         h->tail = n;
1633                 }
1634         }
1635         freeaddrinfo(res0);
1636         free(ps);
1637
1638         return (h);
1639 }
1640
1641 /*
1642  * convert a hostname to a list of addresses and put them in the given buffer.
1643  * test:
1644  *      if set to 1, only simple addresses are accepted (no netblock, no "!").
1645  */
1646 int
1647 append_addr(struct pfr_buffer *b, char *s, int test)
1648 {
1649         char                     *r;
1650         struct node_host        *h, *n;
1651         int                      rv, not = 0;
1652
1653         for (r = s; *r == '!'; r++)
1654                 not = !not;
1655         if ((n = host(r)) == NULL) {
1656                 errno = 0;
1657                 return (-1);
1658         }
1659         rv = append_addr_host(b, n, test, not);
1660         do {
1661                 h = n;
1662                 n = n->next;
1663                 free(h);
1664         } while (n != NULL);
1665         return (rv);
1666 }
1667
1668 /*
1669  * same as previous function, but with a pre-parsed input and the ability
1670  * to "negate" the result. Does not free the node_host list.
1671  * not:
1672  *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1673  */
1674 int
1675 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1676 {
1677         int                      bits;
1678         struct pfr_addr          addr;
1679
1680         do {
1681                 bzero(&addr, sizeof(addr));
1682                 addr.pfra_not = n->not ^ not;
1683                 addr.pfra_af = n->af;
1684                 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1685                 switch (n->af) {
1686                 case AF_INET:
1687                         addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1688                         bits = 32;
1689                         break;
1690                 case AF_INET6:
1691                         memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1692                             sizeof(struct in6_addr));
1693                         bits = 128;
1694                         break;
1695                 default:
1696                         errno = EINVAL;
1697                         return (-1);
1698                 }
1699                 if ((test && (not || addr.pfra_net != bits)) ||
1700                     addr.pfra_net > bits) {
1701                         errno = EINVAL;
1702                         return (-1);
1703                 }
1704                 if (pfr_buf_add(b, &addr))
1705                         return (-1);
1706         } while ((n = n->next) != NULL);
1707
1708         return (0);
1709 }
1710
1711 int
1712 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1713 {
1714         struct pfioc_trans_e trans;
1715
1716         bzero(&trans, sizeof(trans));
1717         trans.rs_num = rs_num;
1718         if (strlcpy(trans.anchor, anchor,
1719             sizeof(trans.anchor)) >= sizeof(trans.anchor))
1720                 errx(1, "pfctl_add_trans: strlcpy");
1721
1722         return pfr_buf_add(buf, &trans);
1723 }
1724
1725 u_int32_t
1726 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1727 {
1728         const struct pfioc_trans_e *p;
1729
1730         PFRB_FOREACH(p, buf)
1731                 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1732                         return (p->ticket);
1733         errx(1, "pfctl_get_ticket: assertion failed");
1734 }
1735
1736 int
1737 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1738 {
1739         struct pfioc_trans trans;
1740
1741         bzero(&trans, sizeof(trans));
1742         trans.size = buf->pfrb_size - from;
1743         trans.esize = sizeof(struct pfioc_trans_e);
1744         trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1745         return ioctl(dev, cmd, &trans);
1746 }