sbin/pfctl/pfctl_parser.c

   1 /*      $OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-2-Clause
   5  *
   6  * Copyright (c) 2001 Daniel Hartmeier
   7  * Copyright (c) 2002,2003 Henning Brauer
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  *    - Redistributions of source code must retain the above copyright
  15  *      notice, this list of conditions and the following disclaimer.
  16  *    - Redistributions in binary form must reproduce the above
  17  *      copyright notice, this list of conditions and the following
  18  *      disclaimer in the documentation and/or other materials provided
  19  *      with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  29  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  31  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39 #include <sys/types.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/socket.h>
  42 #include <sys/param.h>
  43 #include <sys/proc.h>
  44 #include <net/if.h>
  45 #include <netinet/in.h>
  46 #include <netinet/in_systm.h>
  47 #include <netinet/ip.h>
  48 #include <netinet/ip_icmp.h>
  49 #include <netinet/icmp6.h>
  50 #include <net/pfvar.h>
  51 #include <arpa/inet.h>
  52
  53 #include <search.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <string.h>
  57 #include <ctype.h>
  58 #include <netdb.h>
  59 #include <stdarg.h>
  60 #include <errno.h>
  61 #include <err.h>
  62 #include <ifaddrs.h>
  63 #include <unistd.h>
  64
  65 #include "pfctl_parser.h"
  66 #include "pfctl.h"
  67
  68 void             print_op (u_int8_t, const char *, const char *);
  69 void             print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
  70 void             print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
  71 void             print_flags (u_int8_t);
  72 void             print_fromto(struct pf_rule_addr *, pf_osfp_t,
  73                     struct pf_rule_addr *, u_int8_t, u_int8_t, int, int);
  74 int              ifa_skip_if(const char *filter, struct node_host *p);
  75
  76 struct node_host        *host_if(const char *, int);
  77 struct node_host        *host_v4(const char *, int);
  78 struct node_host        *host_v6(const char *, int);
  79 struct node_host        *host_dns(const char *, int, int);
  80
  81 const char * const tcpflags = "FSRPAUEW";
  82
  83 static const struct icmptypeent icmp_type[] = {
  84         { "echoreq",    ICMP_ECHO },
  85         { "echorep",    ICMP_ECHOREPLY },
  86         { "unreach",    ICMP_UNREACH },
  87         { "squench",    ICMP_SOURCEQUENCH },
  88         { "redir",      ICMP_REDIRECT },
  89         { "althost",    ICMP_ALTHOSTADDR },
  90         { "routeradv",  ICMP_ROUTERADVERT },
  91         { "routersol",  ICMP_ROUTERSOLICIT },
  92         { "timex",      ICMP_TIMXCEED },
  93         { "paramprob",  ICMP_PARAMPROB },
  94         { "timereq",    ICMP_TSTAMP },
  95         { "timerep",    ICMP_TSTAMPREPLY },
  96         { "inforeq",    ICMP_IREQ },
  97         { "inforep",    ICMP_IREQREPLY },
  98         { "maskreq",    ICMP_MASKREQ },
  99         { "maskrep",    ICMP_MASKREPLY },
 100         { "trace",      ICMP_TRACEROUTE },
 101         { "dataconv",   ICMP_DATACONVERR },
 102         { "mobredir",   ICMP_MOBILE_REDIRECT },
 103         { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
 104         { "ipv6-here",  ICMP_IPV6_IAMHERE },
 105         { "mobregreq",  ICMP_MOBILE_REGREQUEST },
 106         { "mobregrep",  ICMP_MOBILE_REGREPLY },
 107         { "skip",       ICMP_SKIP },
 108         { "photuris",   ICMP_PHOTURIS }
 109 };
 110
 111 static const struct icmptypeent icmp6_type[] = {
 112         { "unreach",    ICMP6_DST_UNREACH },
 113         { "toobig",     ICMP6_PACKET_TOO_BIG },
 114         { "timex",      ICMP6_TIME_EXCEEDED },
 115         { "paramprob",  ICMP6_PARAM_PROB },
 116         { "echoreq",    ICMP6_ECHO_REQUEST },
 117         { "echorep",    ICMP6_ECHO_REPLY },
 118         { "groupqry",   ICMP6_MEMBERSHIP_QUERY },
 119         { "listqry",    MLD_LISTENER_QUERY },
 120         { "grouprep",   ICMP6_MEMBERSHIP_REPORT },
 121         { "listenrep",  MLD_LISTENER_REPORT },
 122         { "groupterm",  ICMP6_MEMBERSHIP_REDUCTION },
 123         { "listendone", MLD_LISTENER_DONE },
 124         { "routersol",  ND_ROUTER_SOLICIT },
 125         { "routeradv",  ND_ROUTER_ADVERT },
 126         { "neighbrsol", ND_NEIGHBOR_SOLICIT },
 127         { "neighbradv", ND_NEIGHBOR_ADVERT },
 128         { "redir",      ND_REDIRECT },
 129         { "routrrenum", ICMP6_ROUTER_RENUMBERING },
 130         { "wrureq",     ICMP6_WRUREQUEST },
 131         { "wrurep",     ICMP6_WRUREPLY },
 132         { "fqdnreq",    ICMP6_FQDN_QUERY },
 133         { "fqdnrep",    ICMP6_FQDN_REPLY },
 134         { "niqry",      ICMP6_NI_QUERY },
 135         { "nirep",      ICMP6_NI_REPLY },
 136         { "mtraceresp", MLD_MTRACE_RESP },
 137         { "mtrace",     MLD_MTRACE }
 138 };
 139
 140 static const struct icmpcodeent icmp_code[] = {
 141         { "net-unr",            ICMP_UNREACH,   ICMP_UNREACH_NET },
 142         { "host-unr",           ICMP_UNREACH,   ICMP_UNREACH_HOST },
 143         { "proto-unr",          ICMP_UNREACH,   ICMP_UNREACH_PROTOCOL },
 144         { "port-unr",           ICMP_UNREACH,   ICMP_UNREACH_PORT },
 145         { "needfrag",           ICMP_UNREACH,   ICMP_UNREACH_NEEDFRAG },
 146         { "srcfail",            ICMP_UNREACH,   ICMP_UNREACH_SRCFAIL },
 147         { "net-unk",            ICMP_UNREACH,   ICMP_UNREACH_NET_UNKNOWN },
 148         { "host-unk",           ICMP_UNREACH,   ICMP_UNREACH_HOST_UNKNOWN },
 149         { "isolate",            ICMP_UNREACH,   ICMP_UNREACH_ISOLATED },
 150         { "net-prohib",         ICMP_UNREACH,   ICMP_UNREACH_NET_PROHIB },
 151         { "host-prohib",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PROHIB },
 152         { "net-tos",            ICMP_UNREACH,   ICMP_UNREACH_TOSNET },
 153         { "host-tos",           ICMP_UNREACH,   ICMP_UNREACH_TOSHOST },
 154         { "filter-prohib",      ICMP_UNREACH,   ICMP_UNREACH_FILTER_PROHIB },
 155         { "host-preced",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PRECEDENCE },
 156         { "cutoff-preced",      ICMP_UNREACH,   ICMP_UNREACH_PRECEDENCE_CUTOFF },
 157         { "redir-net",          ICMP_REDIRECT,  ICMP_REDIRECT_NET },
 158         { "redir-host",         ICMP_REDIRECT,  ICMP_REDIRECT_HOST },
 159         { "redir-tos-net",      ICMP_REDIRECT,  ICMP_REDIRECT_TOSNET },
 160         { "redir-tos-host",     ICMP_REDIRECT,  ICMP_REDIRECT_TOSHOST },
 161         { "normal-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
 162         { "common-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
 163         { "transit",            ICMP_TIMXCEED,  ICMP_TIMXCEED_INTRANS },
 164         { "reassemb",           ICMP_TIMXCEED,  ICMP_TIMXCEED_REASS },
 165         { "badhead",            ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
 166         { "optmiss",            ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
 167         { "badlen",             ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
 168         { "unknown-ind",        ICMP_PHOTURIS,  ICMP_PHOTURIS_UNKNOWN_INDEX },
 169         { "auth-fail",          ICMP_PHOTURIS,  ICMP_PHOTURIS_AUTH_FAILED },
 170         { "decrypt-fail",       ICMP_PHOTURIS,  ICMP_PHOTURIS_DECRYPT_FAILED }
 171 };
 172
 173 static const struct icmpcodeent icmp6_code[] = {
 174         { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
 175         { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
 176         { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
 177         { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
 178         { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
 179         { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
 180         { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
 181         { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
 182         { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
 183         { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
 184         { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
 185         { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
 186 };
 187
 188 const struct pf_timeout pf_timeouts[] = {
 189         { "tcp.first",          PFTM_TCP_FIRST_PACKET },
 190         { "tcp.opening",        PFTM_TCP_OPENING },
 191         { "tcp.established",    PFTM_TCP_ESTABLISHED },
 192         { "tcp.closing",        PFTM_TCP_CLOSING },
 193         { "tcp.finwait",        PFTM_TCP_FIN_WAIT },
 194         { "tcp.closed",         PFTM_TCP_CLOSED },
 195         { "tcp.tsdiff",         PFTM_TS_DIFF },
 196         { "udp.first",          PFTM_UDP_FIRST_PACKET },
 197         { "udp.single",         PFTM_UDP_SINGLE },
 198         { "udp.multiple",       PFTM_UDP_MULTIPLE },
 199         { "icmp.first",         PFTM_ICMP_FIRST_PACKET },
 200         { "icmp.error",         PFTM_ICMP_ERROR_REPLY },
 201         { "other.first",        PFTM_OTHER_FIRST_PACKET },
 202         { "other.single",       PFTM_OTHER_SINGLE },
 203         { "other.multiple",     PFTM_OTHER_MULTIPLE },
 204         { "frag",               PFTM_FRAG },
 205         { "interval",           PFTM_INTERVAL },
 206         { "adaptive.start",     PFTM_ADAPTIVE_START },
 207         { "adaptive.end",       PFTM_ADAPTIVE_END },
 208         { "src.track",          PFTM_SRC_NODE },
 209         { NULL,                 0 }
 210 };
 211
 212 static struct hsearch_data isgroup_map;
 213
 214 static __attribute__((constructor)) void
 215 pfctl_parser_init(void)
 216 {
 217         /*
 218          * As hdestroy() will never be called on these tables, it will be
 219          * safe to use references into the stored data as keys.
 220          */
 221         if (hcreate_r(0, &isgroup_map) == 0)
 222                 err(1, "Failed to create interface group query response map");
 223 }
 224
 225 const struct icmptypeent *
 226 geticmptypebynumber(u_int8_t type, sa_family_t af)
 227 {
 228         unsigned int    i;
 229
 230         if (af != AF_INET6) {
 231                 for (i=0; i < nitems(icmp_type); i++) {
 232                         if (type == icmp_type[i].type)
 233                                 return (&icmp_type[i]);
 234                 }
 235         } else {
 236                 for (i=0; i < nitems(icmp6_type); i++) {
 237                         if (type == icmp6_type[i].type)
 238                                  return (&icmp6_type[i]);
 239                 }
 240         }
 241         return (NULL);
 242 }
 243
 244 const struct icmptypeent *
 245 geticmptypebyname(char *w, sa_family_t af)
 246 {
 247         unsigned int    i;
 248
 249         if (af != AF_INET6) {
 250                 for (i=0; i < nitems(icmp_type); i++) {
 251                         if (!strcmp(w, icmp_type[i].name))
 252                                 return (&icmp_type[i]);
 253                 }
 254         } else {
 255                 for (i=0; i < nitems(icmp6_type); i++) {
 256                         if (!strcmp(w, icmp6_type[i].name))
 257                                 return (&icmp6_type[i]);
 258                 }
 259         }
 260         return (NULL);
 261 }
 262
 263 const struct icmpcodeent *
 264 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
 265 {
 266         unsigned int    i;
 267
 268         if (af != AF_INET6) {
 269                 for (i=0; i < nitems(icmp_code); i++) {
 270                         if (type == icmp_code[i].type &&
 271                             code == icmp_code[i].code)
 272                                 return (&icmp_code[i]);
 273                 }
 274         } else {
 275                 for (i=0; i < nitems(icmp6_code); i++) {
 276                         if (type == icmp6_code[i].type &&
 277                             code == icmp6_code[i].code)
 278                                 return (&icmp6_code[i]);
 279                 }
 280         }
 281         return (NULL);
 282 }
 283
 284 const struct icmpcodeent *
 285 geticmpcodebyname(u_long type, char *w, sa_family_t af)
 286 {
 287         unsigned int    i;
 288
 289         if (af != AF_INET6) {
 290                 for (i=0; i < nitems(icmp_code); i++) {
 291                         if (type == icmp_code[i].type &&
 292                             !strcmp(w, icmp_code[i].name))
 293                                 return (&icmp_code[i]);
 294                 }
 295         } else {
 296                 for (i=0; i < nitems(icmp6_code); i++) {
 297                         if (type == icmp6_code[i].type &&
 298                             !strcmp(w, icmp6_code[i].name))
 299                                 return (&icmp6_code[i]);
 300                 }
 301         }
 302         return (NULL);
 303 }
 304
 305 void
 306 print_op(u_int8_t op, const char *a1, const char *a2)
 307 {
 308         if (op == PF_OP_IRG)
 309                 printf(" %s >< %s", a1, a2);
 310         else if (op == PF_OP_XRG)
 311                 printf(" %s <> %s", a1, a2);
 312         else if (op == PF_OP_EQ)
 313                 printf(" = %s", a1);
 314         else if (op == PF_OP_NE)
 315                 printf(" != %s", a1);
 316         else if (op == PF_OP_LT)
 317                 printf(" < %s", a1);
 318         else if (op == PF_OP_LE)
 319                 printf(" <= %s", a1);
 320         else if (op == PF_OP_GT)
 321                 printf(" > %s", a1);
 322         else if (op == PF_OP_GE)
 323                 printf(" >= %s", a1);
 324         else if (op == PF_OP_RRG)
 325                 printf(" %s:%s", a1, a2);
 326 }
 327
 328 void
 329 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
 330 {
 331         char             a1[6], a2[6];
 332         struct servent  *s;
 333
 334         if (!numeric)
 335                 s = getservbyport(p1, proto);
 336         else
 337                 s = NULL;
 338         p1 = ntohs(p1);
 339         p2 = ntohs(p2);
 340         snprintf(a1, sizeof(a1), "%u", p1);
 341         snprintf(a2, sizeof(a2), "%u", p2);
 342         printf(" port");
 343         if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
 344                 print_op(op, s->s_name, a2);
 345         else
 346                 print_op(op, a1, a2);
 347 }
 348
 349 void
 350 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
 351 {
 352         char    a1[11], a2[11];
 353
 354         snprintf(a1, sizeof(a1), "%u", u1);
 355         snprintf(a2, sizeof(a2), "%u", u2);
 356         printf(" %s", t);
 357         if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
 358                 print_op(op, "unknown", a2);
 359         else
 360                 print_op(op, a1, a2);
 361 }
 362
 363 void
 364 print_flags(u_int8_t f)
 365 {
 366         int     i;
 367
 368         for (i = 0; tcpflags[i]; ++i)
 369                 if (f & (1 << i))
 370                         printf("%c", tcpflags[i]);
 371 }
 372
 373 void
 374 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
 375     sa_family_t af, u_int8_t proto, int verbose, int numeric)
 376 {
 377         char buf[PF_OSFP_LEN*3];
 378         if (src->addr.type == PF_ADDR_ADDRMASK &&
 379             dst->addr.type == PF_ADDR_ADDRMASK &&
 380             PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
 381             PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
 382             PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
 383             PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
 384             !src->neg && !dst->neg &&
 385             !src->port_op && !dst->port_op &&
 386             osfp == PF_OSFP_ANY)
 387                 printf(" all");
 388         else {
 389                 printf(" from ");
 390                 if (src->neg)
 391                         printf("! ");
 392                 print_addr(&src->addr, af, verbose);
 393                 if (src->port_op)
 394                         print_port(src->port_op, src->port[0],
 395                             src->port[1],
 396                             proto == IPPROTO_TCP ? "tcp" : "udp",
 397                             numeric);
 398                 if (osfp != PF_OSFP_ANY)
 399                         printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
 400                             sizeof(buf)));
 401
 402                 printf(" to ");
 403                 if (dst->neg)
 404                         printf("! ");
 405                 print_addr(&dst->addr, af, verbose);
 406                 if (dst->port_op)
 407                         print_port(dst->port_op, dst->port[0],
 408                             dst->port[1],
 409                             proto == IPPROTO_TCP ? "tcp" : "udp",
 410                             numeric);
 411         }
 412 }
 413
 414 void
 415 print_pool(struct pfctl_pool *pool, u_int16_t p1, u_int16_t p2,
 416     sa_family_t af, int id)
 417 {
 418         struct pf_pooladdr      *pooladdr;
 419
 420         if ((TAILQ_FIRST(&pool->list) != NULL) &&
 421             TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 422                 printf("{ ");
 423         TAILQ_FOREACH(pooladdr, &pool->list, entries){
 424                 switch (id) {
 425                 case PF_NAT:
 426                 case PF_RDR:
 427                 case PF_BINAT:
 428                         print_addr(&pooladdr->addr, af, 0);
 429                         break;
 430                 case PF_PASS:
 431                         if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
 432                                 printf("%s", pooladdr->ifname);
 433                         else {
 434                                 printf("(%s ", pooladdr->ifname);
 435                                 print_addr(&pooladdr->addr, af, 0);
 436                                 printf(")");
 437                         }
 438                         break;
 439                 default:
 440                         break;
 441                 }
 442                 if (TAILQ_NEXT(pooladdr, entries) != NULL)
 443                         printf(", ");
 444                 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 445                         printf(" }");
 446         }
 447         switch (id) {
 448         case PF_NAT:
 449                 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
 450                     p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
 451                         if (p1 == p2)
 452                                 printf(" port %u", p1);
 453                         else
 454                                 printf(" port %u:%u", p1, p2);
 455                 }
 456                 break;
 457         case PF_RDR:
 458                 if (p1) {
 459                         printf(" port %u", p1);
 460                         if (p2 && (p2 != p1))
 461                                 printf(":%u", p2);
 462                 }
 463                 break;
 464         default:
 465                 break;
 466         }
 467         switch (pool->opts & PF_POOL_TYPEMASK) {
 468         case PF_POOL_NONE:
 469                 break;
 470         case PF_POOL_BITMASK:
 471                 printf(" bitmask");
 472                 break;
 473         case PF_POOL_RANDOM:
 474                 printf(" random");
 475                 break;
 476         case PF_POOL_SRCHASH:
 477                 printf(" source-hash 0x%08x%08x%08x%08x",
 478                     pool->key.key32[0], pool->key.key32[1],
 479                     pool->key.key32[2], pool->key.key32[3]);
 480                 break;
 481         case PF_POOL_ROUNDROBIN:
 482                 printf(" round-robin");
 483                 break;
 484         }
 485         if (pool->opts & PF_POOL_STICKYADDR)
 486                 printf(" sticky-address");
 487         if (id == PF_NAT && p1 == 0 && p2 == 0)
 488                 printf(" static-port");
 489         if (pool->mape.offset > 0)
 490                 printf(" map-e-portset %u/%u/%u",
 491                     pool->mape.offset, pool->mape.psidlen, pool->mape.psid);
 492 }
 493
 494 const char      * const pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
 495 const char      * const pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
 496 const char      * const pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
 497 const char      * const pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
 498
 499 void
 500 print_status(struct pf_status *s, int opts)
 501 {
 502         char                    statline[80], *running;
 503         time_t                  runtime;
 504         int                     i;
 505         char                    buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
 506         static const char       hex[] = "0123456789abcdef";
 507
 508         runtime = time(NULL) - s->since;
 509         running = s->running ? "Enabled" : "Disabled";
 510
 511         if (s->since) {
 512                 unsigned int    sec, min, hrs, day = runtime;
 513
 514                 sec = day % 60;
 515                 day /= 60;
 516                 min = day % 60;
 517                 day /= 60;
 518                 hrs = day % 24;
 519                 day /= 24;
 520                 snprintf(statline, sizeof(statline),
 521                     "Status: %s for %u days %.2u:%.2u:%.2u",
 522                     running, day, hrs, min, sec);
 523         } else
 524                 snprintf(statline, sizeof(statline), "Status: %s", running);
 525         printf("%-44s", statline);
 526         switch (s->debug) {
 527         case PF_DEBUG_NONE:
 528                 printf("%15s\n\n", "Debug: None");
 529                 break;
 530         case PF_DEBUG_URGENT:
 531                 printf("%15s\n\n", "Debug: Urgent");
 532                 break;
 533         case PF_DEBUG_MISC:
 534                 printf("%15s\n\n", "Debug: Misc");
 535                 break;
 536         case PF_DEBUG_NOISY:
 537                 printf("%15s\n\n", "Debug: Loud");
 538                 break;
 539         }
 540
 541         if (opts & PF_OPT_VERBOSE) {
 542                 printf("Hostid:   0x%08x\n", ntohl(s->hostid));
 543
 544                 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
 545                         buf[i + i] = hex[s->pf_chksum[i] >> 4];
 546                         buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
 547                 }
 548                 buf[i + i] = '\0';
 549                 printf("Checksum: 0x%s\n\n", buf);
 550         }
 551
 552         if (s->ifname[0] != 0) {
 553                 printf("Interface Stats for %-16s %5s %16s\n",
 554                     s->ifname, "IPv4", "IPv6");
 555                 printf("  %-25s %14llu %16llu\n", "Bytes In",
 556                     (unsigned long long)s->bcounters[0][0],
 557                     (unsigned long long)s->bcounters[1][0]);
 558                 printf("  %-25s %14llu %16llu\n", "Bytes Out",
 559                     (unsigned long long)s->bcounters[0][1],
 560                     (unsigned long long)s->bcounters[1][1]);
 561                 printf("  Packets In\n");
 562                 printf("    %-23s %14llu %16llu\n", "Passed",
 563                     (unsigned long long)s->pcounters[0][0][PF_PASS],
 564                     (unsigned long long)s->pcounters[1][0][PF_PASS]);
 565                 printf("    %-23s %14llu %16llu\n", "Blocked",
 566                     (unsigned long long)s->pcounters[0][0][PF_DROP],
 567                     (unsigned long long)s->pcounters[1][0][PF_DROP]);
 568                 printf("  Packets Out\n");
 569                 printf("    %-23s %14llu %16llu\n", "Passed",
 570                     (unsigned long long)s->pcounters[0][1][PF_PASS],
 571                     (unsigned long long)s->pcounters[1][1][PF_PASS]);
 572                 printf("    %-23s %14llu %16llu\n\n", "Blocked",
 573                     (unsigned long long)s->pcounters[0][1][PF_DROP],
 574                     (unsigned long long)s->pcounters[1][1][PF_DROP]);
 575         }
 576         printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
 577         printf("  %-25s %14u %14s\n", "current entries", s->states, "");
 578         for (i = 0; i < FCNT_MAX; i++) {
 579                 printf("  %-25s %14llu ", pf_fcounters[i],
 580                             (unsigned long long)s->fcounters[i]);
 581                 if (runtime > 0)
 582                         printf("%14.1f/s\n",
 583                             (double)s->fcounters[i] / (double)runtime);
 584                 else
 585                         printf("%14s\n", "");
 586         }
 587         if (opts & PF_OPT_VERBOSE) {
 588                 printf("Source Tracking Table\n");
 589                 printf("  %-25s %14u %14s\n", "current entries",
 590                     s->src_nodes, "");
 591                 for (i = 0; i < SCNT_MAX; i++) {
 592                         printf("  %-25s %14lld ", pf_scounters[i],
 593 #ifdef __FreeBSD__
 594                                     (long long)s->scounters[i]);
 595 #else
 596                                     s->scounters[i]);
 597 #endif
 598                         if (runtime > 0)
 599                                 printf("%14.1f/s\n",
 600                                     (double)s->scounters[i] / (double)runtime);
 601                         else
 602                                 printf("%14s\n", "");
 603                 }
 604         }
 605         printf("Counters\n");
 606         for (i = 0; i < PFRES_MAX; i++) {
 607                 printf("  %-25s %14llu ", pf_reasons[i],
 608                     (unsigned long long)s->counters[i]);
 609                 if (runtime > 0)
 610                         printf("%14.1f/s\n",
 611                             (double)s->counters[i] / (double)runtime);
 612                 else
 613                         printf("%14s\n", "");
 614         }
 615         if (opts & PF_OPT_VERBOSE) {
 616                 printf("Limit Counters\n");
 617                 for (i = 0; i < LCNT_MAX; i++) {
 618                         printf("  %-25s %14lld ", pf_lcounters[i],
 619 #ifdef __FreeBSD__
 620                                     (unsigned long long)s->lcounters[i]);
 621 #else
 622                                     s->lcounters[i]);
 623 #endif
 624                         if (runtime > 0)
 625                                 printf("%14.1f/s\n",
 626                                     (double)s->lcounters[i] / (double)runtime);
 627                         else
 628                                 printf("%14s\n", "");
 629                 }
 630         }
 631 }
 632
 633 void
 634 print_running(struct pf_status *status)
 635 {
 636         printf("%s\n", status->running ? "Enabled" : "Disabled");
 637 }
 638
 639 void
 640 print_src_node(struct pf_src_node *sn, int opts)
 641 {
 642         struct pf_addr_wrap aw;
 643         int min, sec;
 644
 645         memset(&aw, 0, sizeof(aw));
 646         if (sn->af == AF_INET)
 647                 aw.v.a.mask.addr32[0] = 0xffffffff;
 648         else
 649                 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
 650
 651         aw.v.a.addr = sn->addr;
 652         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 653         printf(" -> ");
 654         aw.v.a.addr = sn->raddr;
 655         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 656         printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
 657             sn->conn, sn->conn_rate.count / 1000,
 658             (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
 659         if (opts & PF_OPT_VERBOSE) {
 660                 sec = sn->creation % 60;
 661                 sn->creation /= 60;
 662                 min = sn->creation % 60;
 663                 sn->creation /= 60;
 664                 printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
 665                 if (sn->states == 0) {
 666                         sec = sn->expire % 60;
 667                         sn->expire /= 60;
 668                         min = sn->expire % 60;
 669                         sn->expire /= 60;
 670                         printf(", expires in %.2u:%.2u:%.2u",
 671                             sn->expire, min, sec);
 672                 }
 673                 printf(", %llu pkts, %llu bytes",
 674 #ifdef __FreeBSD__
 675                     (unsigned long long)(sn->packets[0] + sn->packets[1]),
 676                     (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
 677 #else
 678                     sn->packets[0] + sn->packets[1],
 679                     sn->bytes[0] + sn->bytes[1]);
 680 #endif
 681                 switch (sn->ruletype) {
 682                 case PF_NAT:
 683                         if (sn->rule.nr != -1)
 684                                 printf(", nat rule %u", sn->rule.nr);
 685                         break;
 686                 case PF_RDR:
 687                         if (sn->rule.nr != -1)
 688                                 printf(", rdr rule %u", sn->rule.nr);
 689                         break;
 690                 case PF_PASS:
 691                         if (sn->rule.nr != -1)
 692                                 printf(", filter rule %u", sn->rule.nr);
 693                         break;
 694                 }
 695                 printf("\n");
 696         }
 697 }
 698
 699 void
 700 print_rule(struct pfctl_rule *r, const char *anchor_call, int verbose, int numeric)
 701 {
 702         static const char *actiontypes[] = { "pass", "block", "scrub",
 703             "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
 704         static const char *anchortypes[] = { "anchor", "anchor", "anchor",
 705             "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
 706             "binat-anchor", "rdr-anchor", "rdr-anchor" };
 707         int     i, opts;
 708
 709         if (verbose)
 710                 printf("@%d ", r->nr);
 711         if (r->action > PF_NORDR)
 712                 printf("action(%d)", r->action);
 713         else if (anchor_call[0]) {
 714                 if (anchor_call[0] == '_') {
 715                         printf("%s", anchortypes[r->action]);
 716                 } else
 717                         printf("%s \"%s\"", anchortypes[r->action],
 718                             anchor_call);
 719         } else {
 720                 printf("%s", actiontypes[r->action]);
 721                 if (r->natpass)
 722                         printf(" pass");
 723         }
 724         if (r->action == PF_DROP) {
 725                 if (r->rule_flag & PFRULE_RETURN)
 726                         printf(" return");
 727                 else if (r->rule_flag & PFRULE_RETURNRST) {
 728                         if (!r->return_ttl)
 729                                 printf(" return-rst");
 730                         else
 731                                 printf(" return-rst(ttl %d)", r->return_ttl);
 732                 } else if (r->rule_flag & PFRULE_RETURNICMP) {
 733                         const struct icmpcodeent        *ic, *ic6;
 734
 735                         ic = geticmpcodebynumber(r->return_icmp >> 8,
 736                             r->return_icmp & 255, AF_INET);
 737                         ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
 738                             r->return_icmp6 & 255, AF_INET6);
 739
 740                         switch (r->af) {
 741                         case AF_INET:
 742                                 printf(" return-icmp");
 743                                 if (ic == NULL)
 744                                         printf("(%u)", r->return_icmp & 255);
 745                                 else
 746                                         printf("(%s)", ic->name);
 747                                 break;
 748                         case AF_INET6:
 749                                 printf(" return-icmp6");
 750                                 if (ic6 == NULL)
 751                                         printf("(%u)", r->return_icmp6 & 255);
 752                                 else
 753                                         printf("(%s)", ic6->name);
 754                                 break;
 755                         default:
 756                                 printf(" return-icmp");
 757                                 if (ic == NULL)
 758                                         printf("(%u, ", r->return_icmp & 255);
 759                                 else
 760                                         printf("(%s, ", ic->name);
 761                                 if (ic6 == NULL)
 762                                         printf("%u)", r->return_icmp6 & 255);
 763                                 else
 764                                         printf("%s)", ic6->name);
 765                                 break;
 766                         }
 767                 } else
 768                         printf(" drop");
 769         }
 770         if (r->direction == PF_IN)
 771                 printf(" in");
 772         else if (r->direction == PF_OUT)
 773                 printf(" out");
 774         if (r->log) {
 775                 printf(" log");
 776                 if (r->log & ~PF_LOG || r->logif) {
 777                         int count = 0;
 778
 779                         printf(" (");
 780                         if (r->log & PF_LOG_ALL)
 781                                 printf("%sall", count++ ? ", " : "");
 782                         if (r->log & PF_LOG_SOCKET_LOOKUP)
 783                                 printf("%suser", count++ ? ", " : "");
 784                         if (r->logif)
 785                                 printf("%sto pflog%u", count++ ? ", " : "",
 786                                     r->logif);
 787                         printf(")");
 788                 }
 789         }
 790         if (r->quick)
 791                 printf(" quick");
 792         if (r->ifname[0]) {
 793                 if (r->ifnot)
 794                         printf(" on ! %s", r->ifname);
 795                 else
 796                         printf(" on %s", r->ifname);
 797         }
 798         if (r->rt) {
 799                 if (r->rt == PF_ROUTETO)
 800                         printf(" route-to");
 801                 else if (r->rt == PF_REPLYTO)
 802                         printf(" reply-to");
 803                 else if (r->rt == PF_DUPTO)
 804                         printf(" dup-to");
 805                 printf(" ");
 806                 print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
 807         }
 808         if (r->af) {
 809                 if (r->af == AF_INET)
 810                         printf(" inet");
 811                 else
 812                         printf(" inet6");
 813         }
 814         if (r->proto) {
 815                 struct protoent *p;
 816
 817                 if ((p = getprotobynumber(r->proto)) != NULL)
 818                         printf(" proto %s", p->p_name);
 819                 else
 820                         printf(" proto %u", r->proto);
 821         }
 822         print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
 823             verbose, numeric);
 824         if (r->uid.op)
 825                 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
 826                     UID_MAX);
 827         if (r->gid.op)
 828                 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
 829                     GID_MAX);
 830         if (r->flags || r->flagset) {
 831                 printf(" flags ");
 832                 print_flags(r->flags);
 833                 printf("/");
 834                 print_flags(r->flagset);
 835         } else if (r->action == PF_PASS &&
 836             (!r->proto || r->proto == IPPROTO_TCP) &&
 837             !(r->rule_flag & PFRULE_FRAGMENT) &&
 838             !anchor_call[0] && r->keep_state)
 839                 printf(" flags any");
 840         if (r->type) {
 841                 const struct icmptypeent        *it;
 842
 843                 it = geticmptypebynumber(r->type-1, r->af);
 844                 if (r->af != AF_INET6)
 845                         printf(" icmp-type");
 846                 else
 847                         printf(" icmp6-type");
 848                 if (it != NULL)
 849                         printf(" %s", it->name);
 850                 else
 851                         printf(" %u", r->type-1);
 852                 if (r->code) {
 853                         const struct icmpcodeent        *ic;
 854
 855                         ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
 856                         if (ic != NULL)
 857                                 printf(" code %s", ic->name);
 858                         else
 859                                 printf(" code %u", r->code-1);
 860                 }
 861         }
 862         if (r->tos)
 863                 printf(" tos 0x%2.2x", r->tos);
 864         if (r->prio)
 865                 printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
 866         if (r->scrub_flags & PFSTATE_SETMASK) {
 867                 char *comma = "";
 868                 printf(" set (");
 869                 if (r->scrub_flags & PFSTATE_SETPRIO) {
 870                         if (r->set_prio[0] == r->set_prio[1])
 871                                 printf("%s prio %u", comma, r->set_prio[0]);
 872                         else
 873                                 printf("%s prio(%u, %u)", comma, r->set_prio[0],
 874                                     r->set_prio[1]);
 875                         comma = ",";
 876                 }
 877                 printf(" )");
 878         }
 879         if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
 880                 printf(" no state");
 881         else if (r->keep_state == PF_STATE_NORMAL)
 882                 printf(" keep state");
 883         else if (r->keep_state == PF_STATE_MODULATE)
 884                 printf(" modulate state");
 885         else if (r->keep_state == PF_STATE_SYNPROXY)
 886                 printf(" synproxy state");
 887         if (r->prob) {
 888                 char    buf[20];
 889
 890                 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
 891                 for (i = strlen(buf)-1; i > 0; i--) {
 892                         if (buf[i] == '0')
 893                                 buf[i] = '\0';
 894                         else {
 895                                 if (buf[i] == '.')
 896                                         buf[i] = '\0';
 897                                 break;
 898                         }
 899                 }
 900                 printf(" probability %s%%", buf);
 901         }
 902         opts = 0;
 903         if (r->max_states || r->max_src_nodes || r->max_src_states)
 904                 opts = 1;
 905         if (r->rule_flag & PFRULE_NOSYNC)
 906                 opts = 1;
 907         if (r->rule_flag & PFRULE_SRCTRACK)
 908                 opts = 1;
 909         if (r->rule_flag & PFRULE_IFBOUND)
 910                 opts = 1;
 911         if (r->rule_flag & PFRULE_STATESLOPPY)
 912                 opts = 1;
 913         for (i = 0; !opts && i < PFTM_MAX; ++i)
 914                 if (r->timeout[i])
 915                         opts = 1;
 916         if (opts) {
 917                 printf(" (");
 918                 if (r->max_states) {
 919                         printf("max %u", r->max_states);
 920                         opts = 0;
 921                 }
 922                 if (r->rule_flag & PFRULE_NOSYNC) {
 923                         if (!opts)
 924                                 printf(", ");
 925                         printf("no-sync");
 926                         opts = 0;
 927                 }
 928                 if (r->rule_flag & PFRULE_SRCTRACK) {
 929                         if (!opts)
 930                                 printf(", ");
 931                         printf("source-track");
 932                         if (r->rule_flag & PFRULE_RULESRCTRACK)
 933                                 printf(" rule");
 934                         else
 935                                 printf(" global");
 936                         opts = 0;
 937                 }
 938                 if (r->max_src_states) {
 939                         if (!opts)
 940                                 printf(", ");
 941                         printf("max-src-states %u", r->max_src_states);
 942                         opts = 0;
 943                 }
 944                 if (r->max_src_conn) {
 945                         if (!opts)
 946                                 printf(", ");
 947                         printf("max-src-conn %u", r->max_src_conn);
 948                         opts = 0;
 949                 }
 950                 if (r->max_src_conn_rate.limit) {
 951                         if (!opts)
 952                                 printf(", ");
 953                         printf("max-src-conn-rate %u/%u",
 954                             r->max_src_conn_rate.limit,
 955                             r->max_src_conn_rate.seconds);
 956                         opts = 0;
 957                 }
 958                 if (r->max_src_nodes) {
 959                         if (!opts)
 960                                 printf(", ");
 961                         printf("max-src-nodes %u", r->max_src_nodes);
 962                         opts = 0;
 963                 }
 964                 if (r->overload_tblname[0]) {
 965                         if (!opts)
 966                                 printf(", ");
 967                         printf("overload <%s>", r->overload_tblname);
 968                         if (r->flush)
 969                                 printf(" flush");
 970                         if (r->flush & PF_FLUSH_GLOBAL)
 971                                 printf(" global");
 972                 }
 973                 if (r->rule_flag & PFRULE_IFBOUND) {
 974                         if (!opts)
 975                                 printf(", ");
 976                         printf("if-bound");
 977                         opts = 0;
 978                 }
 979                 if (r->rule_flag & PFRULE_STATESLOPPY) {
 980                         if (!opts)
 981                                 printf(", ");
 982                         printf("sloppy");
 983                         opts = 0;
 984                 }
 985                 for (i = 0; i < PFTM_MAX; ++i)
 986                         if (r->timeout[i]) {
 987                                 int j;
 988
 989                                 if (!opts)
 990                                         printf(", ");
 991                                 opts = 0;
 992                                 for (j = 0; pf_timeouts[j].name != NULL;
 993                                     ++j)
 994                                         if (pf_timeouts[j].timeout == i)
 995                                                 break;
 996                                 printf("%s %u", pf_timeouts[j].name == NULL ?
 997                                     "inv.timeout" : pf_timeouts[j].name,
 998                                     r->timeout[i]);
 999                         }
1000                 printf(")");
1001         }
1002         if (r->rule_flag & PFRULE_FRAGMENT)
1003                 printf(" fragment");
1004         if (r->rule_flag & PFRULE_NODF)
1005                 printf(" no-df");
1006         if (r->rule_flag & PFRULE_RANDOMID)
1007                 printf(" random-id");
1008         if (r->min_ttl)
1009                 printf(" min-ttl %d", r->min_ttl);
1010         if (r->max_mss)
1011                 printf(" max-mss %d", r->max_mss);
1012         if (r->rule_flag & PFRULE_SET_TOS)
1013                 printf(" set-tos 0x%2.2x", r->set_tos);
1014         if (r->allow_opts)
1015                 printf(" allow-opts");
1016         if (r->action == PF_SCRUB) {
1017                 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1018                         printf(" reassemble tcp");
1019
1020                 printf(" fragment reassemble");
1021         }
1022         if (r->label[0])
1023                 printf(" label \"%s\"", r->label);
1024         if (r->qname[0] && r->pqname[0])
1025                 printf(" queue(%s, %s)", r->qname, r->pqname);
1026         else if (r->qname[0])
1027                 printf(" queue %s", r->qname);
1028         if (r->tagname[0])
1029                 printf(" tag %s", r->tagname);
1030         if (r->match_tagname[0]) {
1031                 if (r->match_tag_not)
1032                         printf(" !");
1033                 printf(" tagged %s", r->match_tagname);
1034         }
1035         if (r->rtableid != -1)
1036                 printf(" rtable %u", r->rtableid);
1037         if (r->divert.port) {
1038 #ifdef __FreeBSD__
1039                 printf(" divert-to %u", ntohs(r->divert.port));
1040 #else
1041                 if (PF_AZERO(&r->divert.addr, r->af)) {
1042                         printf(" divert-reply");
1043                 } else {
1044                         /* XXX cut&paste from print_addr */
1045                         char buf[48];
1046
1047                         printf(" divert-to ");
1048                         if (inet_ntop(r->af, &r->divert.addr, buf,
1049                             sizeof(buf)) == NULL)
1050                                 printf("?");
1051                         else
1052                                 printf("%s", buf);
1053                         printf(" port %u", ntohs(r->divert.port));
1054                 }
1055 #endif
1056         }
1057         if (!anchor_call[0] && (r->action == PF_NAT ||
1058             r->action == PF_BINAT || r->action == PF_RDR)) {
1059                 printf(" -> ");
1060                 print_pool(&r->rpool, r->rpool.proxy_port[0],
1061                     r->rpool.proxy_port[1], r->af, r->action);
1062         }
1063 }
1064
1065 void
1066 print_tabledef(const char *name, int flags, int addrs,
1067     struct node_tinithead *nodes)
1068 {
1069         struct node_tinit       *ti, *nti;
1070         struct node_host        *h;
1071
1072         printf("table <%s>", name);
1073         if (flags & PFR_TFLAG_CONST)
1074                 printf(" const");
1075         if (flags & PFR_TFLAG_PERSIST)
1076                 printf(" persist");
1077         if (flags & PFR_TFLAG_COUNTERS)
1078                 printf(" counters");
1079         SIMPLEQ_FOREACH(ti, nodes, entries) {
1080                 if (ti->file) {
1081                         printf(" file \"%s\"", ti->file);
1082                         continue;
1083                 }
1084                 printf(" {");
1085                 for (;;) {
1086                         for (h = ti->host; h != NULL; h = h->next) {
1087                                 printf(h->not ? " !" : " ");
1088                                 print_addr(&h->addr, h->af, 0);
1089                         }
1090                         nti = SIMPLEQ_NEXT(ti, entries);
1091                         if (nti != NULL && nti->file == NULL)
1092                                 ti = nti;       /* merge lists */
1093                         else
1094                                 break;
1095                 }
1096                 printf(" }");
1097         }
1098         if (addrs && SIMPLEQ_EMPTY(nodes))
1099                 printf(" { }");
1100         printf("\n");
1101 }
1102
1103 int
1104 parse_flags(char *s)
1105 {
1106         char            *p, *q;
1107         u_int8_t         f = 0;
1108
1109         for (p = s; *p; p++) {
1110                 if ((q = strchr(tcpflags, *p)) == NULL)
1111                         return -1;
1112                 else
1113                         f |= 1 << (q - tcpflags);
1114         }
1115         return (f ? f : PF_TH_ALL);
1116 }
1117
1118 void
1119 set_ipmask(struct node_host *h, u_int8_t b)
1120 {
1121         struct pf_addr  *m, *n;
1122         int              i, j = 0;
1123
1124         m = &h->addr.v.a.mask;
1125         memset(m, 0, sizeof(*m));
1126
1127         while (b >= 32) {
1128                 m->addr32[j++] = 0xffffffff;
1129                 b -= 32;
1130         }
1131         for (i = 31; i > 31-b; --i)
1132                 m->addr32[j] |= (1 << i);
1133         if (b)
1134                 m->addr32[j] = htonl(m->addr32[j]);
1135
1136         /* Mask off bits of the address that will never be used. */
1137         n = &h->addr.v.a.addr;
1138         if (h->addr.type == PF_ADDR_ADDRMASK)
1139                 for (i = 0; i < 4; i++)
1140                         n->addr32[i] = n->addr32[i] & m->addr32[i];
1141 }
1142
1143 int
1144 check_netmask(struct node_host *h, sa_family_t af)
1145 {
1146         struct node_host        *n = NULL;
1147         struct pf_addr  *m;
1148
1149         for (n = h; n != NULL; n = n->next) {
1150                 if (h->addr.type == PF_ADDR_TABLE)
1151                         continue;
1152                 m = &h->addr.v.a.mask;
1153                 /* fix up netmask for dynaddr */
1154                 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1155                     unmask(m, AF_INET6) > 32)
1156                         set_ipmask(n, 32);
1157                 /* netmasks > 32 bit are invalid on v4 */
1158                 if (af == AF_INET &&
1159                     (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1160                         fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1161                             unmask(m, AF_INET6));
1162                         return (1);
1163                 }
1164         }
1165         return (0);
1166 }
1167
1168 /* interface lookup routines */
1169
1170 static struct node_host *iftab;
1171
1172 /*
1173  * Retrieve the list of groups this interface is a member of and make sure
1174  * each group is in the group map.
1175  */
1176 static void
1177 ifa_add_groups_to_map(char *ifa_name)
1178 {
1179         int                      s, len;
1180         struct ifgroupreq        ifgr;
1181         struct ifg_req          *ifg;
1182
1183         s = get_query_socket();
1184
1185         /* Get size of group list for this interface */
1186         memset(&ifgr, 0, sizeof(ifgr));
1187         strlcpy(ifgr.ifgr_name, ifa_name, IFNAMSIZ);
1188         if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1189                 err(1, "SIOCGIFGROUP");
1190
1191         /* Retrieve group list for this interface */
1192         len = ifgr.ifgr_len;
1193         ifgr.ifgr_groups =
1194             (struct ifg_req *)calloc(len / sizeof(struct ifg_req),
1195                 sizeof(struct ifg_req));
1196         if (ifgr.ifgr_groups == NULL)
1197                 err(1, "calloc");
1198         if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1199                 err(1, "SIOCGIFGROUP");
1200
1201         ifg = ifgr.ifgr_groups;
1202         for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
1203                 len -= sizeof(struct ifg_req);
1204                 if (strcmp(ifg->ifgrq_group, "all")) {
1205                         ENTRY                    item;
1206                         ENTRY                   *ret_item;
1207                         int                     *answer;
1208
1209                         item.key = ifg->ifgrq_group;
1210                         if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) {
1211                                 struct ifgroupreq        ifgr2;
1212
1213                                 /* Don't know the answer yet */
1214                                 if ((answer = malloc(sizeof(int))) == NULL)
1215                                         err(1, "malloc");
1216
1217                                 bzero(&ifgr2, sizeof(ifgr2));
1218                                 strlcpy(ifgr2.ifgr_name, ifg->ifgrq_group,
1219                                     sizeof(ifgr2.ifgr_name));
1220                                 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr2) == 0)
1221                                         *answer = ifgr2.ifgr_len;
1222                                 else
1223                                         *answer = 0;
1224
1225                                 item.key = strdup(ifg->ifgrq_group);
1226                                 item.data = answer;
1227                                 if (hsearch_r(item, ENTER, &ret_item,
1228                                         &isgroup_map) == 0)
1229                                         err(1, "interface group query response"
1230                                             " map insert");
1231                         }
1232                 }
1233         }
1234         free(ifgr.ifgr_groups);
1235 }
1236
1237 void
1238 ifa_load(void)
1239 {
1240         struct ifaddrs          *ifap, *ifa;
1241         struct node_host        *n = NULL, *h = NULL;
1242
1243         if (getifaddrs(&ifap) < 0)
1244                 err(1, "getifaddrs");
1245
1246         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1247                 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1248                     ifa->ifa_addr->sa_family == AF_INET6 ||
1249                     ifa->ifa_addr->sa_family == AF_LINK))
1250                                 continue;
1251                 n = calloc(1, sizeof(struct node_host));
1252                 if (n == NULL)
1253                         err(1, "address: calloc");
1254                 n->af = ifa->ifa_addr->sa_family;
1255                 n->ifa_flags = ifa->ifa_flags;
1256 #ifdef __KAME__
1257                 if (n->af == AF_INET6 &&
1258                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1259                     ifa->ifa_addr)->sin6_addr) &&
1260                     ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1261                     0) {
1262                         struct sockaddr_in6     *sin6;
1263
1264                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1265                         sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1266                             sin6->sin6_addr.s6_addr[3];
1267                         sin6->sin6_addr.s6_addr[2] = 0;
1268                         sin6->sin6_addr.s6_addr[3] = 0;
1269                 }
1270 #endif
1271                 n->ifindex = 0;
1272                 if (n->af == AF_INET) {
1273                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1274                             ifa->ifa_addr)->sin_addr.s_addr,
1275                             sizeof(struct in_addr));
1276                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1277                             ifa->ifa_netmask)->sin_addr.s_addr,
1278                             sizeof(struct in_addr));
1279                         if (ifa->ifa_broadaddr != NULL)
1280                                 memcpy(&n->bcast, &((struct sockaddr_in *)
1281                                     ifa->ifa_broadaddr)->sin_addr.s_addr,
1282                                     sizeof(struct in_addr));
1283                         if (ifa->ifa_dstaddr != NULL)
1284                                 memcpy(&n->peer, &((struct sockaddr_in *)
1285                                     ifa->ifa_dstaddr)->sin_addr.s_addr,
1286                                     sizeof(struct in_addr));
1287                 } else if (n->af == AF_INET6) {
1288                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1289                             ifa->ifa_addr)->sin6_addr.s6_addr,
1290                             sizeof(struct in6_addr));
1291                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1292                             ifa->ifa_netmask)->sin6_addr.s6_addr,
1293                             sizeof(struct in6_addr));
1294                         if (ifa->ifa_broadaddr != NULL)
1295                                 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1296                                     ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1297                                     sizeof(struct in6_addr));
1298                         if (ifa->ifa_dstaddr != NULL)
1299                                  memcpy(&n->peer, &((struct sockaddr_in6 *)
1300                                     ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1301                                     sizeof(struct in6_addr));
1302                         n->ifindex = ((struct sockaddr_in6 *)
1303                             ifa->ifa_addr)->sin6_scope_id;
1304                 } else if (n->af == AF_LINK) {
1305                         ifa_add_groups_to_map(ifa->ifa_name);
1306                 }
1307                 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1308                         err(1, "ifa_load: strdup");
1309                 n->next = NULL;
1310                 n->tail = n;
1311                 if (h == NULL)
1312                         h = n;
1313                 else {
1314                         h->tail->next = n;
1315                         h->tail = n;
1316                 }
1317         }
1318
1319         iftab = h;
1320         freeifaddrs(ifap);
1321 }
1322
1323 static int
1324 get_socket_domain(void)
1325 {
1326         int sdom;
1327
1328         sdom = AF_UNSPEC;
1329 #ifdef WITH_INET6
1330         if (sdom == AF_UNSPEC && feature_present("inet6"))
1331                 sdom = AF_INET6;
1332 #endif
1333 #ifdef WITH_INET
1334         if (sdom == AF_UNSPEC && feature_present("inet"))
1335                 sdom = AF_INET;
1336 #endif
1337         if (sdom == AF_UNSPEC)
1338                 sdom = AF_LINK;
1339
1340         return (sdom);
1341 }
1342
1343 int
1344 get_query_socket(void)
1345 {
1346         static int s = -1;
1347
1348         if (s == -1) {
1349                 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1350                         err(1, "socket");
1351         }
1352
1353         return (s);
1354 }
1355
1356 /*
1357  * Returns the response len if the name is a group, otherwise returns 0.
1358  */
1359 static int
1360 is_a_group(char *name)
1361 {
1362         ENTRY                    item;
1363         ENTRY                   *ret_item;
1364
1365         item.key = name;
1366         if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0)
1367                 return (0);
1368
1369         return (*(int *)ret_item->data);
1370 }
1371
1372 struct node_host *
1373 ifa_exists(char *ifa_name)
1374 {
1375         struct node_host        *n;
1376
1377         if (iftab == NULL)
1378                 ifa_load();
1379
1380         /* check whether this is a group */
1381         if (is_a_group(ifa_name)) {
1382                 /* fake a node_host */
1383                 if ((n = calloc(1, sizeof(*n))) == NULL)
1384                         err(1, "calloc");
1385                 if ((n->ifname = strdup(ifa_name)) == NULL)
1386                         err(1, "strdup");
1387                 return (n);
1388         }
1389
1390         for (n = iftab; n; n = n->next) {
1391                 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1392                         return (n);
1393         }
1394
1395         return (NULL);
1396 }
1397
1398 static struct node_host *
1399 if_lookup(char *if_name)
1400 {
1401         struct node_host *p, *n;
1402
1403         for (p = iftab; p; p = p->next) {
1404                 if (! strcmp(if_name, p->ifname)) {
1405                         n = calloc(1, sizeof(struct node_host));
1406                         bcopy(p, n, sizeof(struct node_host));
1407
1408                         n->next = NULL;
1409                         n->tail = n;
1410
1411                         return (n);
1412                 }
1413         }
1414
1415         return (NULL);
1416 }
1417
1418 struct node_host *
1419 ifa_grouplookup(char *ifa_name, int flags)
1420 {
1421         struct ifg_req          *ifg;
1422         struct ifgroupreq        ifgr;
1423         int                      s, len;
1424         struct node_host        *n, *h = NULL;
1425
1426         s = get_query_socket();
1427         len = is_a_group(ifa_name);
1428         if (len == 0)
1429                 return (NULL);
1430         bzero(&ifgr, sizeof(ifgr));
1431         strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1432         ifgr.ifgr_len = len;
1433         if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1434                 err(1, "calloc");
1435         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1436                 err(1, "SIOCGIFGMEMB");
1437
1438         for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1439             ifg++) {
1440                 len -= sizeof(struct ifg_req);
1441                 if ((n = if_lookup(ifg->ifgrq_member)) == NULL)
1442                         continue;
1443                 if (h == NULL)
1444                         h = n;
1445                 else {
1446                         h->tail->next = n;
1447                         h->tail = n->tail;
1448                 }
1449         }
1450         free(ifgr.ifgr_groups);
1451
1452         return (h);
1453 }
1454
1455 struct node_host *
1456 ifa_lookup(char *ifa_name, int flags)
1457 {
1458         struct node_host        *p = NULL, *h = NULL, *n = NULL;
1459         int                      got4 = 0, got6 = 0;
1460         const char               *last_if = NULL;
1461
1462         /* first load iftab and isgroup_map */
1463         if (iftab == NULL)
1464                 ifa_load();
1465
1466         if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1467                 return (h);
1468
1469         if (!strncmp(ifa_name, "self", IFNAMSIZ))
1470                 ifa_name = NULL;
1471
1472         for (p = iftab; p; p = p->next) {
1473                 if (ifa_skip_if(ifa_name, p))
1474                         continue;
1475                 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1476                         continue;
1477                 if ((flags & PFI_AFLAG_BROADCAST) &&
1478                     !(p->ifa_flags & IFF_BROADCAST))
1479                         continue;
1480                 if ((flags & PFI_AFLAG_PEER) &&
1481                     !(p->ifa_flags & IFF_POINTOPOINT))
1482                         continue;
1483                 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1484                         continue;
1485                 if (last_if == NULL || strcmp(last_if, p->ifname))
1486                         got4 = got6 = 0;
1487                 last_if = p->ifname;
1488                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1489                         continue;
1490                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 &&
1491                     IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6))
1492                         continue;
1493                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1494                         continue;
1495                 if (p->af == AF_INET)
1496                         got4 = 1;
1497                 else
1498                         got6 = 1;
1499                 n = calloc(1, sizeof(struct node_host));
1500                 if (n == NULL)
1501                         err(1, "address: calloc");
1502                 n->af = p->af;
1503                 if (flags & PFI_AFLAG_BROADCAST)
1504                         memcpy(&n->addr.v.a.addr, &p->bcast,
1505                             sizeof(struct pf_addr));
1506                 else if (flags & PFI_AFLAG_PEER)
1507                         memcpy(&n->addr.v.a.addr, &p->peer,
1508                             sizeof(struct pf_addr));
1509                 else
1510                         memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1511                             sizeof(struct pf_addr));
1512                 if (flags & PFI_AFLAG_NETWORK)
1513                         set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1514                 else {
1515                         if (n->af == AF_INET) {
1516                                 if (p->ifa_flags & IFF_LOOPBACK &&
1517                                     p->ifa_flags & IFF_LINK1)
1518                                         memcpy(&n->addr.v.a.mask,
1519                                             &p->addr.v.a.mask,
1520                                             sizeof(struct pf_addr));
1521                                 else
1522                                         set_ipmask(n, 32);
1523                         } else
1524                                 set_ipmask(n, 128);
1525                 }
1526                 n->ifindex = p->ifindex;
1527                 n->ifname = strdup(p->ifname);
1528
1529                 n->next = NULL;
1530                 n->tail = n;
1531                 if (h == NULL)
1532                         h = n;
1533                 else {
1534                         h->tail->next = n;
1535                         h->tail = n;
1536                 }
1537         }
1538         return (h);
1539 }
1540
1541 int
1542 ifa_skip_if(const char *filter, struct node_host *p)
1543 {
1544         int     n;
1545
1546         if (p->af != AF_INET && p->af != AF_INET6)
1547                 return (1);
1548         if (filter == NULL || !*filter)
1549                 return (0);
1550         if (!strcmp(p->ifname, filter))
1551                 return (0);     /* exact match */
1552         n = strlen(filter);
1553         if (n < 1 || n >= IFNAMSIZ)
1554                 return (1);     /* sanity check */
1555         if (filter[n-1] >= '0' && filter[n-1] <= '9')
1556                 return (1);     /* only do exact match in that case */
1557         if (strncmp(p->ifname, filter, n))
1558                 return (1);     /* prefix doesn't match */
1559         return (p->ifname[n] < '0' || p->ifname[n] > '9');
1560 }
1561
1562
1563 struct node_host *
1564 host(const char *s)
1565 {
1566         struct node_host        *h = NULL;
1567         int                      mask, v4mask, v6mask, cont = 1;
1568         char                    *p, *q, *ps;
1569
1570         if ((p = strrchr(s, '/')) != NULL) {
1571                 mask = strtol(p+1, &q, 0);
1572                 if (!q || *q || mask > 128 || q == (p+1)) {
1573                         fprintf(stderr, "invalid netmask '%s'\n", p);
1574                         return (NULL);
1575                 }
1576                 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1577                         err(1, "host: malloc");
1578                 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1579                 v4mask = v6mask = mask;
1580         } else {
1581                 if ((ps = strdup(s)) == NULL)
1582                         err(1, "host: strdup");
1583                 v4mask = 32;
1584                 v6mask = 128;
1585                 mask = -1;
1586         }
1587
1588         /* IPv4 address? */
1589         if (cont && (h = host_v4(s, mask)) != NULL)
1590                 cont = 0;
1591
1592         /* IPv6 address? */
1593         if (cont && (h = host_v6(ps, v6mask)) != NULL)
1594                 cont = 0;
1595
1596         /* interface with this name exists? */
1597         /* expensive with thousands of interfaces - prioritze IPv4/6 check */
1598         if (cont && (h = host_if(ps, mask)) != NULL)
1599                 cont = 0;
1600
1601         /* dns lookup */
1602         if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1603                 cont = 0;
1604         free(ps);
1605
1606         if (h == NULL || cont == 1) {
1607                 fprintf(stderr, "no IP address found for %s\n", s);
1608                 return (NULL);
1609         }
1610         return (h);
1611 }
1612
1613 struct node_host *
1614 host_if(const char *s, int mask)
1615 {
1616         struct node_host        *n, *h = NULL;
1617         char                    *p, *ps;
1618         int                      flags = 0;
1619
1620         if ((ps = strdup(s)) == NULL)
1621                 err(1, "host_if: strdup");
1622         while ((p = strrchr(ps, ':')) != NULL) {
1623                 if (!strcmp(p+1, "network"))
1624                         flags |= PFI_AFLAG_NETWORK;
1625                 else if (!strcmp(p+1, "broadcast"))
1626                         flags |= PFI_AFLAG_BROADCAST;
1627                 else if (!strcmp(p+1, "peer"))
1628                         flags |= PFI_AFLAG_PEER;
1629                 else if (!strcmp(p+1, "0"))
1630                         flags |= PFI_AFLAG_NOALIAS;
1631                 else {
1632                         free(ps);
1633                         return (NULL);
1634                 }
1635                 *p = '\0';
1636         }
1637         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1638                 fprintf(stderr, "illegal combination of interface modifiers\n");
1639                 free(ps);
1640                 return (NULL);
1641         }
1642         if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1643                 fprintf(stderr, "network or broadcast lookup, but "
1644                     "extra netmask given\n");
1645                 free(ps);
1646                 return (NULL);
1647         }
1648         if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1649                 /* interface with this name exists */
1650                 h = ifa_lookup(ps, flags);
1651                 for (n = h; n != NULL && mask > -1; n = n->next)
1652                         set_ipmask(n, mask);
1653         }
1654
1655         free(ps);
1656         return (h);
1657 }
1658
1659 struct node_host *
1660 host_v4(const char *s, int mask)
1661 {
1662         struct node_host        *h = NULL;
1663         struct in_addr           ina;
1664         int                      bits = 32;
1665
1666         memset(&ina, 0, sizeof(struct in_addr));
1667         if (strrchr(s, '/') != NULL) {
1668                 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1669                         return (NULL);
1670         } else {
1671                 if (inet_pton(AF_INET, s, &ina) != 1)
1672                         return (NULL);
1673         }
1674
1675         h = calloc(1, sizeof(struct node_host));
1676         if (h == NULL)
1677                 err(1, "address: calloc");
1678         h->ifname = NULL;
1679         h->af = AF_INET;
1680         h->addr.v.a.addr.addr32[0] = ina.s_addr;
1681         set_ipmask(h, bits);
1682         h->next = NULL;
1683         h->tail = h;
1684
1685         return (h);
1686 }
1687
1688 struct node_host *
1689 host_v6(const char *s, int mask)
1690 {
1691         struct addrinfo          hints, *res;
1692         struct node_host        *h = NULL;
1693
1694         memset(&hints, 0, sizeof(hints));
1695         hints.ai_family = AF_INET6;
1696         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1697         hints.ai_flags = AI_NUMERICHOST;
1698         if (getaddrinfo(s, "0", &hints, &res) == 0) {
1699                 h = calloc(1, sizeof(struct node_host));
1700                 if (h == NULL)
1701                         err(1, "address: calloc");
1702                 h->ifname = NULL;
1703                 h->af = AF_INET6;
1704                 memcpy(&h->addr.v.a.addr,
1705                     &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1706                     sizeof(h->addr.v.a.addr));
1707                 h->ifindex =
1708                     ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1709                 set_ipmask(h, mask);
1710                 freeaddrinfo(res);
1711                 h->next = NULL;
1712                 h->tail = h;
1713         }
1714
1715         return (h);
1716 }
1717
1718 struct node_host *
1719 host_dns(const char *s, int v4mask, int v6mask)
1720 {
1721         struct addrinfo          hints, *res0, *res;
1722         struct node_host        *n, *h = NULL;
1723         int                      error, noalias = 0;
1724         int                      got4 = 0, got6 = 0;
1725         char                    *p, *ps;
1726
1727         if ((ps = strdup(s)) == NULL)
1728                 err(1, "host_dns: strdup");
1729         if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1730                 noalias = 1;
1731                 *p = '\0';
1732         }
1733         memset(&hints, 0, sizeof(hints));
1734         hints.ai_family = PF_UNSPEC;
1735         hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1736         error = getaddrinfo(ps, NULL, &hints, &res0);
1737         if (error) {
1738                 free(ps);
1739                 return (h);
1740         }
1741
1742         for (res = res0; res; res = res->ai_next) {
1743                 if (res->ai_family != AF_INET &&
1744                     res->ai_family != AF_INET6)
1745                         continue;
1746                 if (noalias) {
1747                         if (res->ai_family == AF_INET) {
1748                                 if (got4)
1749                                         continue;
1750                                 got4 = 1;
1751                         } else {
1752                                 if (got6)
1753                                         continue;
1754                                 got6 = 1;
1755                         }
1756                 }
1757                 n = calloc(1, sizeof(struct node_host));
1758                 if (n == NULL)
1759                         err(1, "host_dns: calloc");
1760                 n->ifname = NULL;
1761                 n->af = res->ai_family;
1762                 if (res->ai_family == AF_INET) {
1763                         memcpy(&n->addr.v.a.addr,
1764                             &((struct sockaddr_in *)
1765                             res->ai_addr)->sin_addr.s_addr,
1766                             sizeof(struct in_addr));
1767                         set_ipmask(n, v4mask);
1768                 } else {
1769                         memcpy(&n->addr.v.a.addr,
1770                             &((struct sockaddr_in6 *)
1771                             res->ai_addr)->sin6_addr.s6_addr,
1772                             sizeof(struct in6_addr));
1773                         n->ifindex =
1774                             ((struct sockaddr_in6 *)
1775                             res->ai_addr)->sin6_scope_id;
1776                         set_ipmask(n, v6mask);
1777                 }
1778                 n->next = NULL;
1779                 n->tail = n;
1780                 if (h == NULL)
1781                         h = n;
1782                 else {
1783                         h->tail->next = n;
1784                         h->tail = n;
1785                 }
1786         }
1787         freeaddrinfo(res0);
1788         free(ps);
1789
1790         return (h);
1791 }
1792
1793 /*
1794  * convert a hostname to a list of addresses and put them in the given buffer.
1795  * test:
1796  *      if set to 1, only simple addresses are accepted (no netblock, no "!").
1797  */
1798 int
1799 append_addr(struct pfr_buffer *b, char *s, int test)
1800 {
1801         char                     *r;
1802         struct node_host        *h, *n;
1803         int                      rv, not = 0;
1804
1805         for (r = s; *r == '!'; r++)
1806                 not = !not;
1807         if ((n = host(r)) == NULL) {
1808                 errno = 0;
1809                 return (-1);
1810         }
1811         rv = append_addr_host(b, n, test, not);
1812         do {
1813                 h = n;
1814                 n = n->next;
1815                 free(h);
1816         } while (n != NULL);
1817         return (rv);
1818 }
1819
1820 /*
1821  * same as previous function, but with a pre-parsed input and the ability
1822  * to "negate" the result. Does not free the node_host list.
1823  * not:
1824  *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1825  */
1826 int
1827 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1828 {
1829         int                      bits;
1830         struct pfr_addr          addr;
1831
1832         do {
1833                 bzero(&addr, sizeof(addr));
1834                 addr.pfra_not = n->not ^ not;
1835                 addr.pfra_af = n->af;
1836                 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1837                 switch (n->af) {
1838                 case AF_INET:
1839                         addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1840                         bits = 32;
1841                         break;
1842                 case AF_INET6:
1843                         memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1844                             sizeof(struct in6_addr));
1845                         bits = 128;
1846                         break;
1847                 default:
1848                         errno = EINVAL;
1849                         return (-1);
1850                 }
1851                 if ((test && (not || addr.pfra_net != bits)) ||
1852                     addr.pfra_net > bits) {
1853                         errno = EINVAL;
1854                         return (-1);
1855                 }
1856                 if (pfr_buf_add(b, &addr))
1857                         return (-1);
1858         } while ((n = n->next) != NULL);
1859
1860         return (0);
1861 }
1862
1863 int
1864 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1865 {
1866         struct pfioc_trans_e trans;
1867
1868         bzero(&trans, sizeof(trans));
1869         trans.rs_num = rs_num;
1870         if (strlcpy(trans.anchor, anchor,
1871             sizeof(trans.anchor)) >= sizeof(trans.anchor))
1872                 errx(1, "pfctl_add_trans: strlcpy");
1873
1874         return pfr_buf_add(buf, &trans);
1875 }
1876
1877 u_int32_t
1878 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1879 {
1880         struct pfioc_trans_e *p;
1881
1882         PFRB_FOREACH(p, buf)
1883                 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1884                         return (p->ticket);
1885         errx(1, "pfctl_get_ticket: assertion failed");
1886 }
1887
1888 int
1889 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1890 {
1891         struct pfioc_trans trans;
1892
1893         bzero(&trans, sizeof(trans));
1894         trans.size = buf->pfrb_size - from;
1895         trans.esize = sizeof(struct pfioc_trans_e);
1896         trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1897         return ioctl(dev, cmd, &trans);
1898 }