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 <assert.h>
  54 #include <search.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <ctype.h>
  59 #include <netdb.h>
  60 #include <stdarg.h>
  61 #include <errno.h>
  62 #include <err.h>
  63 #include <ifaddrs.h>
  64 #include <unistd.h>
  65
  66 #include "pfctl_parser.h"
  67 #include "pfctl.h"
  68
  69 void             print_op (u_int8_t, const char *, const char *);
  70 void             print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
  71 void             print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
  72 void             print_flags (u_int8_t);
  73 void             print_fromto(struct pf_rule_addr *, pf_osfp_t,
  74                     struct pf_rule_addr *, u_int8_t, u_int8_t, int, int);
  75 int              ifa_skip_if(const char *filter, struct node_host *p);
  76
  77 struct node_host        *host_if(const char *, int);
  78 struct node_host        *host_v4(const char *, int);
  79 struct node_host        *host_v6(const char *, int);
  80 struct node_host        *host_dns(const char *, int, int);
  81
  82 const char * const tcpflags = "FSRPAUEW";
  83
  84 static const struct icmptypeent icmp_type[] = {
  85         { "echoreq",    ICMP_ECHO },
  86         { "echorep",    ICMP_ECHOREPLY },
  87         { "unreach",    ICMP_UNREACH },
  88         { "squench",    ICMP_SOURCEQUENCH },
  89         { "redir",      ICMP_REDIRECT },
  90         { "althost",    ICMP_ALTHOSTADDR },
  91         { "routeradv",  ICMP_ROUTERADVERT },
  92         { "routersol",  ICMP_ROUTERSOLICIT },
  93         { "timex",      ICMP_TIMXCEED },
  94         { "paramprob",  ICMP_PARAMPROB },
  95         { "timereq",    ICMP_TSTAMP },
  96         { "timerep",    ICMP_TSTAMPREPLY },
  97         { "inforeq",    ICMP_IREQ },
  98         { "inforep",    ICMP_IREQREPLY },
  99         { "maskreq",    ICMP_MASKREQ },
 100         { "maskrep",    ICMP_MASKREPLY },
 101         { "trace",      ICMP_TRACEROUTE },
 102         { "dataconv",   ICMP_DATACONVERR },
 103         { "mobredir",   ICMP_MOBILE_REDIRECT },
 104         { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
 105         { "ipv6-here",  ICMP_IPV6_IAMHERE },
 106         { "mobregreq",  ICMP_MOBILE_REGREQUEST },
 107         { "mobregrep",  ICMP_MOBILE_REGREPLY },
 108         { "skip",       ICMP_SKIP },
 109         { "photuris",   ICMP_PHOTURIS }
 110 };
 111
 112 static const struct icmptypeent icmp6_type[] = {
 113         { "unreach",    ICMP6_DST_UNREACH },
 114         { "toobig",     ICMP6_PACKET_TOO_BIG },
 115         { "timex",      ICMP6_TIME_EXCEEDED },
 116         { "paramprob",  ICMP6_PARAM_PROB },
 117         { "echoreq",    ICMP6_ECHO_REQUEST },
 118         { "echorep",    ICMP6_ECHO_REPLY },
 119         { "groupqry",   ICMP6_MEMBERSHIP_QUERY },
 120         { "listqry",    MLD_LISTENER_QUERY },
 121         { "grouprep",   ICMP6_MEMBERSHIP_REPORT },
 122         { "listenrep",  MLD_LISTENER_REPORT },
 123         { "groupterm",  ICMP6_MEMBERSHIP_REDUCTION },
 124         { "listendone", MLD_LISTENER_DONE },
 125         { "routersol",  ND_ROUTER_SOLICIT },
 126         { "routeradv",  ND_ROUTER_ADVERT },
 127         { "neighbrsol", ND_NEIGHBOR_SOLICIT },
 128         { "neighbradv", ND_NEIGHBOR_ADVERT },
 129         { "redir",      ND_REDIRECT },
 130         { "routrrenum", ICMP6_ROUTER_RENUMBERING },
 131         { "wrureq",     ICMP6_WRUREQUEST },
 132         { "wrurep",     ICMP6_WRUREPLY },
 133         { "fqdnreq",    ICMP6_FQDN_QUERY },
 134         { "fqdnrep",    ICMP6_FQDN_REPLY },
 135         { "niqry",      ICMP6_NI_QUERY },
 136         { "nirep",      ICMP6_NI_REPLY },
 137         { "mtraceresp", MLD_MTRACE_RESP },
 138         { "mtrace",     MLD_MTRACE }
 139 };
 140
 141 static const struct icmpcodeent icmp_code[] = {
 142         { "net-unr",            ICMP_UNREACH,   ICMP_UNREACH_NET },
 143         { "host-unr",           ICMP_UNREACH,   ICMP_UNREACH_HOST },
 144         { "proto-unr",          ICMP_UNREACH,   ICMP_UNREACH_PROTOCOL },
 145         { "port-unr",           ICMP_UNREACH,   ICMP_UNREACH_PORT },
 146         { "needfrag",           ICMP_UNREACH,   ICMP_UNREACH_NEEDFRAG },
 147         { "srcfail",            ICMP_UNREACH,   ICMP_UNREACH_SRCFAIL },
 148         { "net-unk",            ICMP_UNREACH,   ICMP_UNREACH_NET_UNKNOWN },
 149         { "host-unk",           ICMP_UNREACH,   ICMP_UNREACH_HOST_UNKNOWN },
 150         { "isolate",            ICMP_UNREACH,   ICMP_UNREACH_ISOLATED },
 151         { "net-prohib",         ICMP_UNREACH,   ICMP_UNREACH_NET_PROHIB },
 152         { "host-prohib",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PROHIB },
 153         { "net-tos",            ICMP_UNREACH,   ICMP_UNREACH_TOSNET },
 154         { "host-tos",           ICMP_UNREACH,   ICMP_UNREACH_TOSHOST },
 155         { "filter-prohib",      ICMP_UNREACH,   ICMP_UNREACH_FILTER_PROHIB },
 156         { "host-preced",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PRECEDENCE },
 157         { "cutoff-preced",      ICMP_UNREACH,   ICMP_UNREACH_PRECEDENCE_CUTOFF },
 158         { "redir-net",          ICMP_REDIRECT,  ICMP_REDIRECT_NET },
 159         { "redir-host",         ICMP_REDIRECT,  ICMP_REDIRECT_HOST },
 160         { "redir-tos-net",      ICMP_REDIRECT,  ICMP_REDIRECT_TOSNET },
 161         { "redir-tos-host",     ICMP_REDIRECT,  ICMP_REDIRECT_TOSHOST },
 162         { "normal-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
 163         { "common-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
 164         { "transit",            ICMP_TIMXCEED,  ICMP_TIMXCEED_INTRANS },
 165         { "reassemb",           ICMP_TIMXCEED,  ICMP_TIMXCEED_REASS },
 166         { "badhead",            ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
 167         { "optmiss",            ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
 168         { "badlen",             ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
 169         { "unknown-ind",        ICMP_PHOTURIS,  ICMP_PHOTURIS_UNKNOWN_INDEX },
 170         { "auth-fail",          ICMP_PHOTURIS,  ICMP_PHOTURIS_AUTH_FAILED },
 171         { "decrypt-fail",       ICMP_PHOTURIS,  ICMP_PHOTURIS_DECRYPT_FAILED }
 172 };
 173
 174 static const struct icmpcodeent icmp6_code[] = {
 175         { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
 176         { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
 177         { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
 178         { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
 179         { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
 180         { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
 181         { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
 182         { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
 183         { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
 184         { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
 185         { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
 186         { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
 187 };
 188
 189 const struct pf_timeout pf_timeouts[] = {
 190         { "tcp.first",          PFTM_TCP_FIRST_PACKET },
 191         { "tcp.opening",        PFTM_TCP_OPENING },
 192         { "tcp.established",    PFTM_TCP_ESTABLISHED },
 193         { "tcp.closing",        PFTM_TCP_CLOSING },
 194         { "tcp.finwait",        PFTM_TCP_FIN_WAIT },
 195         { "tcp.closed",         PFTM_TCP_CLOSED },
 196         { "tcp.tsdiff",         PFTM_TS_DIFF },
 197         { "udp.first",          PFTM_UDP_FIRST_PACKET },
 198         { "udp.single",         PFTM_UDP_SINGLE },
 199         { "udp.multiple",       PFTM_UDP_MULTIPLE },
 200         { "icmp.first",         PFTM_ICMP_FIRST_PACKET },
 201         { "icmp.error",         PFTM_ICMP_ERROR_REPLY },
 202         { "other.first",        PFTM_OTHER_FIRST_PACKET },
 203         { "other.single",       PFTM_OTHER_SINGLE },
 204         { "other.multiple",     PFTM_OTHER_MULTIPLE },
 205         { "frag",               PFTM_FRAG },
 206         { "interval",           PFTM_INTERVAL },
 207         { "adaptive.start",     PFTM_ADAPTIVE_START },
 208         { "adaptive.end",       PFTM_ADAPTIVE_END },
 209         { "src.track",          PFTM_SRC_NODE },
 210         { NULL,                 0 }
 211 };
 212
 213 static struct hsearch_data isgroup_map;
 214
 215 static __attribute__((constructor)) void
 216 pfctl_parser_init(void)
 217 {
 218         /*
 219          * As hdestroy() will never be called on these tables, it will be
 220          * safe to use references into the stored data as keys.
 221          */
 222         if (hcreate_r(0, &isgroup_map) == 0)
 223                 err(1, "Failed to create interface group query response map");
 224 }
 225
 226 const struct icmptypeent *
 227 geticmptypebynumber(u_int8_t type, sa_family_t af)
 228 {
 229         unsigned int    i;
 230
 231         if (af != AF_INET6) {
 232                 for (i=0; i < nitems(icmp_type); i++) {
 233                         if (type == icmp_type[i].type)
 234                                 return (&icmp_type[i]);
 235                 }
 236         } else {
 237                 for (i=0; i < nitems(icmp6_type); i++) {
 238                         if (type == icmp6_type[i].type)
 239                                  return (&icmp6_type[i]);
 240                 }
 241         }
 242         return (NULL);
 243 }
 244
 245 const struct icmptypeent *
 246 geticmptypebyname(char *w, sa_family_t af)
 247 {
 248         unsigned int    i;
 249
 250         if (af != AF_INET6) {
 251                 for (i=0; i < nitems(icmp_type); i++) {
 252                         if (!strcmp(w, icmp_type[i].name))
 253                                 return (&icmp_type[i]);
 254                 }
 255         } else {
 256                 for (i=0; i < nitems(icmp6_type); i++) {
 257                         if (!strcmp(w, icmp6_type[i].name))
 258                                 return (&icmp6_type[i]);
 259                 }
 260         }
 261         return (NULL);
 262 }
 263
 264 const struct icmpcodeent *
 265 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
 266 {
 267         unsigned int    i;
 268
 269         if (af != AF_INET6) {
 270                 for (i=0; i < nitems(icmp_code); i++) {
 271                         if (type == icmp_code[i].type &&
 272                             code == icmp_code[i].code)
 273                                 return (&icmp_code[i]);
 274                 }
 275         } else {
 276                 for (i=0; i < nitems(icmp6_code); i++) {
 277                         if (type == icmp6_code[i].type &&
 278                             code == icmp6_code[i].code)
 279                                 return (&icmp6_code[i]);
 280                 }
 281         }
 282         return (NULL);
 283 }
 284
 285 const struct icmpcodeent *
 286 geticmpcodebyname(u_long type, char *w, sa_family_t af)
 287 {
 288         unsigned int    i;
 289
 290         if (af != AF_INET6) {
 291                 for (i=0; i < nitems(icmp_code); i++) {
 292                         if (type == icmp_code[i].type &&
 293                             !strcmp(w, icmp_code[i].name))
 294                                 return (&icmp_code[i]);
 295                 }
 296         } else {
 297                 for (i=0; i < nitems(icmp6_code); i++) {
 298                         if (type == icmp6_code[i].type &&
 299                             !strcmp(w, icmp6_code[i].name))
 300                                 return (&icmp6_code[i]);
 301                 }
 302         }
 303         return (NULL);
 304 }
 305
 306 void
 307 print_op(u_int8_t op, const char *a1, const char *a2)
 308 {
 309         if (op == PF_OP_IRG)
 310                 printf(" %s >< %s", a1, a2);
 311         else if (op == PF_OP_XRG)
 312                 printf(" %s <> %s", a1, a2);
 313         else if (op == PF_OP_EQ)
 314                 printf(" = %s", a1);
 315         else if (op == PF_OP_NE)
 316                 printf(" != %s", a1);
 317         else if (op == PF_OP_LT)
 318                 printf(" < %s", a1);
 319         else if (op == PF_OP_LE)
 320                 printf(" <= %s", a1);
 321         else if (op == PF_OP_GT)
 322                 printf(" > %s", a1);
 323         else if (op == PF_OP_GE)
 324                 printf(" >= %s", a1);
 325         else if (op == PF_OP_RRG)
 326                 printf(" %s:%s", a1, a2);
 327 }
 328
 329 void
 330 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
 331 {
 332         char             a1[6], a2[6];
 333         struct servent  *s;
 334
 335         if (!numeric)
 336                 s = getservbyport(p1, proto);
 337         else
 338                 s = NULL;
 339         p1 = ntohs(p1);
 340         p2 = ntohs(p2);
 341         snprintf(a1, sizeof(a1), "%u", p1);
 342         snprintf(a2, sizeof(a2), "%u", p2);
 343         printf(" port");
 344         if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
 345                 print_op(op, s->s_name, a2);
 346         else
 347                 print_op(op, a1, a2);
 348 }
 349
 350 void
 351 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
 352 {
 353         char    a1[11], a2[11];
 354
 355         snprintf(a1, sizeof(a1), "%u", u1);
 356         snprintf(a2, sizeof(a2), "%u", u2);
 357         printf(" %s", t);
 358         if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
 359                 print_op(op, "unknown", a2);
 360         else
 361                 print_op(op, a1, a2);
 362 }
 363
 364 void
 365 print_flags(u_int8_t f)
 366 {
 367         int     i;
 368
 369         for (i = 0; tcpflags[i]; ++i)
 370                 if (f & (1 << i))
 371                         printf("%c", tcpflags[i]);
 372 }
 373
 374 void
 375 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
 376     sa_family_t af, u_int8_t proto, int verbose, int numeric)
 377 {
 378         char buf[PF_OSFP_LEN*3];
 379         if (src->addr.type == PF_ADDR_ADDRMASK &&
 380             dst->addr.type == PF_ADDR_ADDRMASK &&
 381             PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
 382             PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
 383             PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
 384             PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
 385             !src->neg && !dst->neg &&
 386             !src->port_op && !dst->port_op &&
 387             osfp == PF_OSFP_ANY)
 388                 printf(" all");
 389         else {
 390                 printf(" from ");
 391                 if (src->neg)
 392                         printf("! ");
 393                 print_addr(&src->addr, af, verbose);
 394                 if (src->port_op)
 395                         print_port(src->port_op, src->port[0],
 396                             src->port[1],
 397                             proto == IPPROTO_TCP ? "tcp" : "udp",
 398                             numeric);
 399                 if (osfp != PF_OSFP_ANY)
 400                         printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
 401                             sizeof(buf)));
 402
 403                 printf(" to ");
 404                 if (dst->neg)
 405                         printf("! ");
 406                 print_addr(&dst->addr, af, verbose);
 407                 if (dst->port_op)
 408                         print_port(dst->port_op, dst->port[0],
 409                             dst->port[1],
 410                             proto == IPPROTO_TCP ? "tcp" : "udp",
 411                             numeric);
 412         }
 413 }
 414
 415 void
 416 print_pool(struct pfctl_pool *pool, u_int16_t p1, u_int16_t p2,
 417     sa_family_t af, int id)
 418 {
 419         struct pf_pooladdr      *pooladdr;
 420
 421         if ((TAILQ_FIRST(&pool->list) != NULL) &&
 422             TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 423                 printf("{ ");
 424         TAILQ_FOREACH(pooladdr, &pool->list, entries){
 425                 switch (id) {
 426                 case PF_NAT:
 427                 case PF_RDR:
 428                 case PF_BINAT:
 429                         print_addr(&pooladdr->addr, af, 0);
 430                         break;
 431                 case PF_PASS:
 432                         if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
 433                                 printf("%s", pooladdr->ifname);
 434                         else {
 435                                 printf("(%s ", pooladdr->ifname);
 436                                 print_addr(&pooladdr->addr, af, 0);
 437                                 printf(")");
 438                         }
 439                         break;
 440                 default:
 441                         break;
 442                 }
 443                 if (TAILQ_NEXT(pooladdr, entries) != NULL)
 444                         printf(", ");
 445                 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 446                         printf(" }");
 447         }
 448         switch (id) {
 449         case PF_NAT:
 450                 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
 451                     p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
 452                         if (p1 == p2)
 453                                 printf(" port %u", p1);
 454                         else
 455                                 printf(" port %u:%u", p1, p2);
 456                 }
 457                 break;
 458         case PF_RDR:
 459                 if (p1) {
 460                         printf(" port %u", p1);
 461                         if (p2 && (p2 != p1))
 462                                 printf(":%u", p2);
 463                 }
 464                 break;
 465         default:
 466                 break;
 467         }
 468         switch (pool->opts & PF_POOL_TYPEMASK) {
 469         case PF_POOL_NONE:
 470                 break;
 471         case PF_POOL_BITMASK:
 472                 printf(" bitmask");
 473                 break;
 474         case PF_POOL_RANDOM:
 475                 printf(" random");
 476                 break;
 477         case PF_POOL_SRCHASH:
 478                 printf(" source-hash 0x%08x%08x%08x%08x",
 479                     pool->key.key32[0], pool->key.key32[1],
 480                     pool->key.key32[2], pool->key.key32[3]);
 481                 break;
 482         case PF_POOL_ROUNDROBIN:
 483                 printf(" round-robin");
 484                 break;
 485         }
 486         if (pool->opts & PF_POOL_STICKYADDR)
 487                 printf(" sticky-address");
 488         if (id == PF_NAT && p1 == 0 && p2 == 0)
 489                 printf(" static-port");
 490         if (pool->mape.offset > 0)
 491                 printf(" map-e-portset %u/%u/%u",
 492                     pool->mape.offset, pool->mape.psidlen, pool->mape.psid);
 493 }
 494
 495 const char      * const pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
 496 const char      * const pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
 497 const char      * const pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
 498 const char      * const pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
 499
 500 void
 501 print_status(struct pfctl_status *s, struct pfctl_syncookies *cookies, int opts)
 502 {
 503         struct pfctl_status_counter     *c;
 504         char                    statline[80], *running;
 505         time_t                  runtime;
 506         int                     i;
 507         char                    buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
 508         static const char       hex[] = "0123456789abcdef";
 509
 510         runtime = time(NULL) - s->since;
 511         running = s->running ? "Enabled" : "Disabled";
 512
 513         if (s->since) {
 514                 unsigned int    sec, min, hrs, day = runtime;
 515
 516                 sec = day % 60;
 517                 day /= 60;
 518                 min = day % 60;
 519                 day /= 60;
 520                 hrs = day % 24;
 521                 day /= 24;
 522                 snprintf(statline, sizeof(statline),
 523                     "Status: %s for %u days %.2u:%.2u:%.2u",
 524                     running, day, hrs, min, sec);
 525         } else
 526                 snprintf(statline, sizeof(statline), "Status: %s", running);
 527         printf("%-44s", statline);
 528         switch (s->debug) {
 529         case PF_DEBUG_NONE:
 530                 printf("%15s\n\n", "Debug: None");
 531                 break;
 532         case PF_DEBUG_URGENT:
 533                 printf("%15s\n\n", "Debug: Urgent");
 534                 break;
 535         case PF_DEBUG_MISC:
 536                 printf("%15s\n\n", "Debug: Misc");
 537                 break;
 538         case PF_DEBUG_NOISY:
 539                 printf("%15s\n\n", "Debug: Loud");
 540                 break;
 541         }
 542
 543         if (opts & PF_OPT_VERBOSE) {
 544                 printf("Hostid:   0x%08x\n", ntohl(s->hostid));
 545
 546                 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
 547                         buf[i + i] = hex[s->pf_chksum[i] >> 4];
 548                         buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
 549                 }
 550                 buf[i + i] = '\0';
 551                 printf("Checksum: 0x%s\n\n", buf);
 552         }
 553
 554         if (s->ifname[0] != 0) {
 555                 printf("Interface Stats for %-16s %5s %16s\n",
 556                     s->ifname, "IPv4", "IPv6");
 557                 printf("  %-25s %14llu %16llu\n", "Bytes In",
 558                     (unsigned long long)s->bcounters[0][0],
 559                     (unsigned long long)s->bcounters[1][0]);
 560                 printf("  %-25s %14llu %16llu\n", "Bytes Out",
 561                     (unsigned long long)s->bcounters[0][1],
 562                     (unsigned long long)s->bcounters[1][1]);
 563                 printf("  Packets In\n");
 564                 printf("    %-23s %14llu %16llu\n", "Passed",
 565                     (unsigned long long)s->pcounters[0][0][PF_PASS],
 566                     (unsigned long long)s->pcounters[1][0][PF_PASS]);
 567                 printf("    %-23s %14llu %16llu\n", "Blocked",
 568                     (unsigned long long)s->pcounters[0][0][PF_DROP],
 569                     (unsigned long long)s->pcounters[1][0][PF_DROP]);
 570                 printf("  Packets Out\n");
 571                 printf("    %-23s %14llu %16llu\n", "Passed",
 572                     (unsigned long long)s->pcounters[0][1][PF_PASS],
 573                     (unsigned long long)s->pcounters[1][1][PF_PASS]);
 574                 printf("    %-23s %14llu %16llu\n\n", "Blocked",
 575                     (unsigned long long)s->pcounters[0][1][PF_DROP],
 576                     (unsigned long long)s->pcounters[1][1][PF_DROP]);
 577         }
 578         printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
 579         printf("  %-25s %14ju %14s\n", "current entries", s->states, "");
 580         TAILQ_FOREACH(c, &s->fcounters, entry) {
 581                 printf("  %-25s %14ju ", c->name, c->counter);
 582                 if (runtime > 0)
 583                         printf("%14.1f/s\n",
 584                             (double)c->counter / (double)runtime);
 585                 else
 586                         printf("%14s\n", "");
 587         }
 588         if (opts & PF_OPT_VERBOSE) {
 589                 printf("Source Tracking Table\n");
 590                 printf("  %-25s %14ju %14s\n", "current entries",
 591                     s->src_nodes, "");
 592                 TAILQ_FOREACH(c, &s->scounters, entry) {
 593                         printf("  %-25s %14ju ", c->name, c->counter);
 594                         if (runtime > 0)
 595                                 printf("%14.1f/s\n",
 596                                     (double)c->counter / (double)runtime);
 597                         else
 598                                 printf("%14s\n", "");
 599                 }
 600         }
 601         printf("Counters\n");
 602         TAILQ_FOREACH(c, &s->counters, entry) {
 603                 printf("  %-25s %14ju ", c->name, c->counter);
 604                 if (runtime > 0)
 605                         printf("%14.1f/s\n",
 606                             (double)c->counter / (double)runtime);
 607                 else
 608                         printf("%14s\n", "");
 609         }
 610         if (opts & PF_OPT_VERBOSE) {
 611                 printf("Limit Counters\n");
 612                 TAILQ_FOREACH(c, &s->lcounters, entry) {
 613                         printf("  %-25s %14ju ", c->name, c->counter);
 614                         if (runtime > 0)
 615                                 printf("%14.1f/s\n",
 616                                     (double)c->counter / (double)runtime);
 617                         else
 618                                 printf("%14s\n", "");
 619                 }
 620
 621                 printf("Syncookies\n");
 622                 assert(cookies->mode <= PFCTL_SYNCOOKIES_ADAPTIVE);
 623                 printf("  %-25s %s\n", "mode",
 624                     PFCTL_SYNCOOKIES_MODE_NAMES[cookies->mode]);
 625         }
 626 }
 627
 628 void
 629 print_running(struct pfctl_status *status)
 630 {
 631         printf("%s\n", status->running ? "Enabled" : "Disabled");
 632 }
 633
 634 void
 635 print_src_node(struct pf_src_node *sn, int opts)
 636 {
 637         struct pf_addr_wrap aw;
 638         int min, sec;
 639
 640         memset(&aw, 0, sizeof(aw));
 641         if (sn->af == AF_INET)
 642                 aw.v.a.mask.addr32[0] = 0xffffffff;
 643         else
 644                 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
 645
 646         aw.v.a.addr = sn->addr;
 647         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 648         printf(" -> ");
 649         aw.v.a.addr = sn->raddr;
 650         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 651         printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
 652             sn->conn, sn->conn_rate.count / 1000,
 653             (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
 654         if (opts & PF_OPT_VERBOSE) {
 655                 sec = sn->creation % 60;
 656                 sn->creation /= 60;
 657                 min = sn->creation % 60;
 658                 sn->creation /= 60;
 659                 printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
 660                 if (sn->states == 0) {
 661                         sec = sn->expire % 60;
 662                         sn->expire /= 60;
 663                         min = sn->expire % 60;
 664                         sn->expire /= 60;
 665                         printf(", expires in %.2u:%.2u:%.2u",
 666                             sn->expire, min, sec);
 667                 }
 668                 printf(", %llu pkts, %llu bytes",
 669 #ifdef __FreeBSD__
 670                     (unsigned long long)(sn->packets[0] + sn->packets[1]),
 671                     (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
 672 #else
 673                     sn->packets[0] + sn->packets[1],
 674                     sn->bytes[0] + sn->bytes[1]);
 675 #endif
 676                 switch (sn->ruletype) {
 677                 case PF_NAT:
 678                         if (sn->rule.nr != -1)
 679                                 printf(", nat rule %u", sn->rule.nr);
 680                         break;
 681                 case PF_RDR:
 682                         if (sn->rule.nr != -1)
 683                                 printf(", rdr rule %u", sn->rule.nr);
 684                         break;
 685                 case PF_PASS:
 686                         if (sn->rule.nr != -1)
 687                                 printf(", filter rule %u", sn->rule.nr);
 688                         break;
 689                 }
 690                 printf("\n");
 691         }
 692 }
 693
 694 void
 695 print_rule(struct pfctl_rule *r, const char *anchor_call, int verbose, int numeric)
 696 {
 697         static const char *actiontypes[] = { "pass", "block", "scrub",
 698             "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
 699         static const char *anchortypes[] = { "anchor", "anchor", "anchor",
 700             "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
 701             "binat-anchor", "rdr-anchor", "rdr-anchor" };
 702         int     i, opts;
 703
 704         if (verbose)
 705                 printf("@%d ", r->nr);
 706         if (r->action == PF_MATCH)
 707                 printf("match");
 708         else if (r->action > PF_NORDR)
 709                 printf("action(%d)", r->action);
 710         else if (anchor_call[0]) {
 711                 if (anchor_call[0] == '_') {
 712                         printf("%s", anchortypes[r->action]);
 713                 } else
 714                         printf("%s \"%s\"", anchortypes[r->action],
 715                             anchor_call);
 716         } else {
 717                 printf("%s", actiontypes[r->action]);
 718                 if (r->natpass)
 719                         printf(" pass");
 720         }
 721         if (r->action == PF_DROP) {
 722                 if (r->rule_flag & PFRULE_RETURN)
 723                         printf(" return");
 724                 else if (r->rule_flag & PFRULE_RETURNRST) {
 725                         if (!r->return_ttl)
 726                                 printf(" return-rst");
 727                         else
 728                                 printf(" return-rst(ttl %d)", r->return_ttl);
 729                 } else if (r->rule_flag & PFRULE_RETURNICMP) {
 730                         const struct icmpcodeent        *ic, *ic6;
 731
 732                         ic = geticmpcodebynumber(r->return_icmp >> 8,
 733                             r->return_icmp & 255, AF_INET);
 734                         ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
 735                             r->return_icmp6 & 255, AF_INET6);
 736
 737                         switch (r->af) {
 738                         case AF_INET:
 739                                 printf(" return-icmp");
 740                                 if (ic == NULL)
 741                                         printf("(%u)", r->return_icmp & 255);
 742                                 else
 743                                         printf("(%s)", ic->name);
 744                                 break;
 745                         case AF_INET6:
 746                                 printf(" return-icmp6");
 747                                 if (ic6 == NULL)
 748                                         printf("(%u)", r->return_icmp6 & 255);
 749                                 else
 750                                         printf("(%s)", ic6->name);
 751                                 break;
 752                         default:
 753                                 printf(" return-icmp");
 754                                 if (ic == NULL)
 755                                         printf("(%u, ", r->return_icmp & 255);
 756                                 else
 757                                         printf("(%s, ", ic->name);
 758                                 if (ic6 == NULL)
 759                                         printf("%u)", r->return_icmp6 & 255);
 760                                 else
 761                                         printf("%s)", ic6->name);
 762                                 break;
 763                         }
 764                 } else
 765                         printf(" drop");
 766         }
 767         if (r->direction == PF_IN)
 768                 printf(" in");
 769         else if (r->direction == PF_OUT)
 770                 printf(" out");
 771         if (r->log) {
 772                 printf(" log");
 773                 if (r->log & ~PF_LOG || r->logif) {
 774                         int count = 0;
 775
 776                         printf(" (");
 777                         if (r->log & PF_LOG_ALL)
 778                                 printf("%sall", count++ ? ", " : "");
 779                         if (r->log & PF_LOG_SOCKET_LOOKUP)
 780                                 printf("%suser", count++ ? ", " : "");
 781                         if (r->logif)
 782                                 printf("%sto pflog%u", count++ ? ", " : "",
 783                                     r->logif);
 784                         printf(")");
 785                 }
 786         }
 787         if (r->quick)
 788                 printf(" quick");
 789         if (r->ifname[0]) {
 790                 if (r->ifnot)
 791                         printf(" on ! %s", r->ifname);
 792                 else
 793                         printf(" on %s", r->ifname);
 794         }
 795         if (r->rt) {
 796                 if (r->rt == PF_ROUTETO)
 797                         printf(" route-to");
 798                 else if (r->rt == PF_REPLYTO)
 799                         printf(" reply-to");
 800                 else if (r->rt == PF_DUPTO)
 801                         printf(" dup-to");
 802                 printf(" ");
 803                 print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
 804         }
 805         if (r->af) {
 806                 if (r->af == AF_INET)
 807                         printf(" inet");
 808                 else
 809                         printf(" inet6");
 810         }
 811         if (r->proto) {
 812                 const char *protoname;
 813
 814                 if ((protoname = pfctl_proto2name(r->proto)) != NULL)
 815                         printf(" proto %s", protoname);
 816                 else
 817                         printf(" proto %u", r->proto);
 818         }
 819         print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
 820             verbose, numeric);
 821         if (r->uid.op)
 822                 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
 823                     UID_MAX);
 824         if (r->gid.op)
 825                 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
 826                     GID_MAX);
 827         if (r->flags || r->flagset) {
 828                 printf(" flags ");
 829                 print_flags(r->flags);
 830                 printf("/");
 831                 print_flags(r->flagset);
 832         } else if (r->action == PF_PASS &&
 833             (!r->proto || r->proto == IPPROTO_TCP) &&
 834             !(r->rule_flag & PFRULE_FRAGMENT) &&
 835             !anchor_call[0] && r->keep_state)
 836                 printf(" flags any");
 837         if (r->type) {
 838                 const struct icmptypeent        *it;
 839
 840                 it = geticmptypebynumber(r->type-1, r->af);
 841                 if (r->af != AF_INET6)
 842                         printf(" icmp-type");
 843                 else
 844                         printf(" icmp6-type");
 845                 if (it != NULL)
 846                         printf(" %s", it->name);
 847                 else
 848                         printf(" %u", r->type-1);
 849                 if (r->code) {
 850                         const struct icmpcodeent        *ic;
 851
 852                         ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
 853                         if (ic != NULL)
 854                                 printf(" code %s", ic->name);
 855                         else
 856                                 printf(" code %u", r->code-1);
 857                 }
 858         }
 859         if (r->tos)
 860                 printf(" tos 0x%2.2x", r->tos);
 861         if (r->prio)
 862                 printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
 863         if (r->scrub_flags & PFSTATE_SETMASK) {
 864                 char *comma = "";
 865                 printf(" set (");
 866                 if (r->scrub_flags & PFSTATE_SETPRIO) {
 867                         if (r->set_prio[0] == r->set_prio[1])
 868                                 printf("%s prio %u", comma, r->set_prio[0]);
 869                         else
 870                                 printf("%s prio(%u, %u)", comma, r->set_prio[0],
 871                                     r->set_prio[1]);
 872                         comma = ",";
 873                 }
 874                 printf(" )");
 875         }
 876         if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
 877                 printf(" no state");
 878         else if (r->keep_state == PF_STATE_NORMAL)
 879                 printf(" keep state");
 880         else if (r->keep_state == PF_STATE_MODULATE)
 881                 printf(" modulate state");
 882         else if (r->keep_state == PF_STATE_SYNPROXY)
 883                 printf(" synproxy state");
 884         if (r->prob) {
 885                 char    buf[20];
 886
 887                 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
 888                 for (i = strlen(buf)-1; i > 0; i--) {
 889                         if (buf[i] == '0')
 890                                 buf[i] = '\0';
 891                         else {
 892                                 if (buf[i] == '.')
 893                                         buf[i] = '\0';
 894                                 break;
 895                         }
 896                 }
 897                 printf(" probability %s%%", buf);
 898         }
 899         opts = 0;
 900         if (r->max_states || r->max_src_nodes || r->max_src_states)
 901                 opts = 1;
 902         if (r->rule_flag & PFRULE_NOSYNC)
 903                 opts = 1;
 904         if (r->rule_flag & PFRULE_SRCTRACK)
 905                 opts = 1;
 906         if (r->rule_flag & PFRULE_IFBOUND)
 907                 opts = 1;
 908         if (r->rule_flag & PFRULE_STATESLOPPY)
 909                 opts = 1;
 910         for (i = 0; !opts && i < PFTM_MAX; ++i)
 911                 if (r->timeout[i])
 912                         opts = 1;
 913         if (opts) {
 914                 printf(" (");
 915                 if (r->max_states) {
 916                         printf("max %u", r->max_states);
 917                         opts = 0;
 918                 }
 919                 if (r->rule_flag & PFRULE_NOSYNC) {
 920                         if (!opts)
 921                                 printf(", ");
 922                         printf("no-sync");
 923                         opts = 0;
 924                 }
 925                 if (r->rule_flag & PFRULE_SRCTRACK) {
 926                         if (!opts)
 927                                 printf(", ");
 928                         printf("source-track");
 929                         if (r->rule_flag & PFRULE_RULESRCTRACK)
 930                                 printf(" rule");
 931                         else
 932                                 printf(" global");
 933                         opts = 0;
 934                 }
 935                 if (r->max_src_states) {
 936                         if (!opts)
 937                                 printf(", ");
 938                         printf("max-src-states %u", r->max_src_states);
 939                         opts = 0;
 940                 }
 941                 if (r->max_src_conn) {
 942                         if (!opts)
 943                                 printf(", ");
 944                         printf("max-src-conn %u", r->max_src_conn);
 945                         opts = 0;
 946                 }
 947                 if (r->max_src_conn_rate.limit) {
 948                         if (!opts)
 949                                 printf(", ");
 950                         printf("max-src-conn-rate %u/%u",
 951                             r->max_src_conn_rate.limit,
 952                             r->max_src_conn_rate.seconds);
 953                         opts = 0;
 954                 }
 955                 if (r->max_src_nodes) {
 956                         if (!opts)
 957                                 printf(", ");
 958                         printf("max-src-nodes %u", r->max_src_nodes);
 959                         opts = 0;
 960                 }
 961                 if (r->overload_tblname[0]) {
 962                         if (!opts)
 963                                 printf(", ");
 964                         printf("overload <%s>", r->overload_tblname);
 965                         if (r->flush)
 966                                 printf(" flush");
 967                         if (r->flush & PF_FLUSH_GLOBAL)
 968                                 printf(" global");
 969                 }
 970                 if (r->rule_flag & PFRULE_IFBOUND) {
 971                         if (!opts)
 972                                 printf(", ");
 973                         printf("if-bound");
 974                         opts = 0;
 975                 }
 976                 if (r->rule_flag & PFRULE_STATESLOPPY) {
 977                         if (!opts)
 978                                 printf(", ");
 979                         printf("sloppy");
 980                         opts = 0;
 981                 }
 982                 for (i = 0; i < PFTM_MAX; ++i)
 983                         if (r->timeout[i]) {
 984                                 int j;
 985
 986                                 if (!opts)
 987                                         printf(", ");
 988                                 opts = 0;
 989                                 for (j = 0; pf_timeouts[j].name != NULL;
 990                                     ++j)
 991                                         if (pf_timeouts[j].timeout == i)
 992                                                 break;
 993                                 printf("%s %u", pf_timeouts[j].name == NULL ?
 994                                     "inv.timeout" : pf_timeouts[j].name,
 995                                     r->timeout[i]);
 996                         }
 997                 printf(")");
 998         }
 999         if (r->rule_flag & PFRULE_FRAGMENT)
1000                 printf(" fragment");
1001         if (r->rule_flag & PFRULE_NODF)
1002                 printf(" no-df");
1003         if (r->rule_flag & PFRULE_RANDOMID)
1004                 printf(" random-id");
1005         if (r->min_ttl)
1006                 printf(" min-ttl %d", r->min_ttl);
1007         if (r->max_mss)
1008                 printf(" max-mss %d", r->max_mss);
1009         if (r->rule_flag & PFRULE_SET_TOS)
1010                 printf(" set-tos 0x%2.2x", r->set_tos);
1011         if (r->allow_opts)
1012                 printf(" allow-opts");
1013         if (r->action == PF_SCRUB) {
1014                 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1015                         printf(" reassemble tcp");
1016
1017                 printf(" fragment reassemble");
1018         }
1019         i = 0;
1020         while (r->label[i][0])
1021                 printf(" label \"%s\"", r->label[i++]);
1022         if (r->ridentifier)
1023                 printf(" ridentifier %u", r->ridentifier);
1024         /* Only dnrpipe as we might do (0, 42) to only queue return traffic. */
1025         if (r->dnrpipe)
1026                 printf(" %s(%d, %d)",
1027                     r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1028                     r->dnpipe, r->dnrpipe);
1029         else if (r->dnpipe)
1030                 printf(" %s %d",
1031                     r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1032                     r->dnpipe);
1033         if (r->qname[0] && r->pqname[0])
1034                 printf(" queue(%s, %s)", r->qname, r->pqname);
1035         else if (r->qname[0])
1036                 printf(" queue %s", r->qname);
1037         if (r->tagname[0])
1038                 printf(" tag %s", r->tagname);
1039         if (r->match_tagname[0]) {
1040                 if (r->match_tag_not)
1041                         printf(" !");
1042                 printf(" tagged %s", r->match_tagname);
1043         }
1044         if (r->rtableid != -1)
1045                 printf(" rtable %u", r->rtableid);
1046         if (r->divert.port) {
1047 #ifdef __FreeBSD__
1048                 printf(" divert-to %u", ntohs(r->divert.port));
1049 #else
1050                 if (PF_AZERO(&r->divert.addr, r->af)) {
1051                         printf(" divert-reply");
1052                 } else {
1053                         /* XXX cut&paste from print_addr */
1054                         char buf[48];
1055
1056                         printf(" divert-to ");
1057                         if (inet_ntop(r->af, &r->divert.addr, buf,
1058                             sizeof(buf)) == NULL)
1059                                 printf("?");
1060                         else
1061                                 printf("%s", buf);
1062                         printf(" port %u", ntohs(r->divert.port));
1063                 }
1064 #endif
1065         }
1066         if (!anchor_call[0] && (r->action == PF_NAT ||
1067             r->action == PF_BINAT || r->action == PF_RDR)) {
1068                 printf(" -> ");
1069                 print_pool(&r->rpool, r->rpool.proxy_port[0],
1070                     r->rpool.proxy_port[1], r->af, r->action);
1071         }
1072 }
1073
1074 void
1075 print_tabledef(const char *name, int flags, int addrs,
1076     struct node_tinithead *nodes)
1077 {
1078         struct node_tinit       *ti, *nti;
1079         struct node_host        *h;
1080
1081         printf("table <%s>", name);
1082         if (flags & PFR_TFLAG_CONST)
1083                 printf(" const");
1084         if (flags & PFR_TFLAG_PERSIST)
1085                 printf(" persist");
1086         if (flags & PFR_TFLAG_COUNTERS)
1087                 printf(" counters");
1088         SIMPLEQ_FOREACH(ti, nodes, entries) {
1089                 if (ti->file) {
1090                         printf(" file \"%s\"", ti->file);
1091                         continue;
1092                 }
1093                 printf(" {");
1094                 for (;;) {
1095                         for (h = ti->host; h != NULL; h = h->next) {
1096                                 printf(h->not ? " !" : " ");
1097                                 print_addr(&h->addr, h->af, 0);
1098                         }
1099                         nti = SIMPLEQ_NEXT(ti, entries);
1100                         if (nti != NULL && nti->file == NULL)
1101                                 ti = nti;       /* merge lists */
1102                         else
1103                                 break;
1104                 }
1105                 printf(" }");
1106         }
1107         if (addrs && SIMPLEQ_EMPTY(nodes))
1108                 printf(" { }");
1109         printf("\n");
1110 }
1111
1112 int
1113 parse_flags(char *s)
1114 {
1115         char            *p, *q;
1116         u_int8_t         f = 0;
1117
1118         for (p = s; *p; p++) {
1119                 if ((q = strchr(tcpflags, *p)) == NULL)
1120                         return -1;
1121                 else
1122                         f |= 1 << (q - tcpflags);
1123         }
1124         return (f ? f : PF_TH_ALL);
1125 }
1126
1127 void
1128 set_ipmask(struct node_host *h, u_int8_t b)
1129 {
1130         struct pf_addr  *m, *n;
1131         int              i, j = 0;
1132
1133         m = &h->addr.v.a.mask;
1134         memset(m, 0, sizeof(*m));
1135
1136         while (b >= 32) {
1137                 m->addr32[j++] = 0xffffffff;
1138                 b -= 32;
1139         }
1140         for (i = 31; i > 31-b; --i)
1141                 m->addr32[j] |= (1 << i);
1142         if (b)
1143                 m->addr32[j] = htonl(m->addr32[j]);
1144
1145         /* Mask off bits of the address that will never be used. */
1146         n = &h->addr.v.a.addr;
1147         if (h->addr.type == PF_ADDR_ADDRMASK)
1148                 for (i = 0; i < 4; i++)
1149                         n->addr32[i] = n->addr32[i] & m->addr32[i];
1150 }
1151
1152 int
1153 check_netmask(struct node_host *h, sa_family_t af)
1154 {
1155         struct node_host        *n = NULL;
1156         struct pf_addr  *m;
1157
1158         for (n = h; n != NULL; n = n->next) {
1159                 if (h->addr.type == PF_ADDR_TABLE)
1160                         continue;
1161                 m = &h->addr.v.a.mask;
1162                 /* fix up netmask for dynaddr */
1163                 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1164                     unmask(m, AF_INET6) > 32)
1165                         set_ipmask(n, 32);
1166                 /* netmasks > 32 bit are invalid on v4 */
1167                 if (af == AF_INET &&
1168                     (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1169                         fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1170                             unmask(m, AF_INET6));
1171                         return (1);
1172                 }
1173         }
1174         return (0);
1175 }
1176
1177 /* interface lookup routines */
1178
1179 static struct node_host *iftab;
1180
1181 /*
1182  * Retrieve the list of groups this interface is a member of and make sure
1183  * each group is in the group map.
1184  */
1185 static void
1186 ifa_add_groups_to_map(char *ifa_name)
1187 {
1188         int                      s, len;
1189         struct ifgroupreq        ifgr;
1190         struct ifg_req          *ifg;
1191
1192         s = get_query_socket();
1193
1194         /* Get size of group list for this interface */
1195         memset(&ifgr, 0, sizeof(ifgr));
1196         strlcpy(ifgr.ifgr_name, ifa_name, IFNAMSIZ);
1197         if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1198                 err(1, "SIOCGIFGROUP");
1199
1200         /* Retrieve group list for this interface */
1201         len = ifgr.ifgr_len;
1202         ifgr.ifgr_groups =
1203             (struct ifg_req *)calloc(len / sizeof(struct ifg_req),
1204                 sizeof(struct ifg_req));
1205         if (ifgr.ifgr_groups == NULL)
1206                 err(1, "calloc");
1207         if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1208                 err(1, "SIOCGIFGROUP");
1209
1210         ifg = ifgr.ifgr_groups;
1211         for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
1212                 len -= sizeof(struct ifg_req);
1213                 if (strcmp(ifg->ifgrq_group, "all")) {
1214                         ENTRY                    item;
1215                         ENTRY                   *ret_item;
1216                         int                     *answer;
1217
1218                         item.key = ifg->ifgrq_group;
1219                         if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) {
1220                                 struct ifgroupreq        ifgr2;
1221
1222                                 /* Don't know the answer yet */
1223                                 if ((answer = malloc(sizeof(int))) == NULL)
1224                                         err(1, "malloc");
1225
1226                                 bzero(&ifgr2, sizeof(ifgr2));
1227                                 strlcpy(ifgr2.ifgr_name, ifg->ifgrq_group,
1228                                     sizeof(ifgr2.ifgr_name));
1229                                 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr2) == 0)
1230                                         *answer = ifgr2.ifgr_len;
1231                                 else
1232                                         *answer = 0;
1233
1234                                 item.key = strdup(ifg->ifgrq_group);
1235                                 item.data = answer;
1236                                 if (hsearch_r(item, ENTER, &ret_item,
1237                                         &isgroup_map) == 0)
1238                                         err(1, "interface group query response"
1239                                             " map insert");
1240                         }
1241                 }
1242         }
1243         free(ifgr.ifgr_groups);
1244 }
1245
1246 void
1247 ifa_load(void)
1248 {
1249         struct ifaddrs          *ifap, *ifa;
1250         struct node_host        *n = NULL, *h = NULL;
1251
1252         if (getifaddrs(&ifap) < 0)
1253                 err(1, "getifaddrs");
1254
1255         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1256                 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1257                     ifa->ifa_addr->sa_family == AF_INET6 ||
1258                     ifa->ifa_addr->sa_family == AF_LINK))
1259                                 continue;
1260                 n = calloc(1, sizeof(struct node_host));
1261                 if (n == NULL)
1262                         err(1, "address: calloc");
1263                 n->af = ifa->ifa_addr->sa_family;
1264                 n->ifa_flags = ifa->ifa_flags;
1265 #ifdef __KAME__
1266                 if (n->af == AF_INET6 &&
1267                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1268                     ifa->ifa_addr)->sin6_addr) &&
1269                     ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1270                     0) {
1271                         struct sockaddr_in6     *sin6;
1272
1273                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1274                         sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1275                             sin6->sin6_addr.s6_addr[3];
1276                         sin6->sin6_addr.s6_addr[2] = 0;
1277                         sin6->sin6_addr.s6_addr[3] = 0;
1278                 }
1279 #endif
1280                 n->ifindex = 0;
1281                 if (n->af == AF_INET) {
1282                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1283                             ifa->ifa_addr)->sin_addr.s_addr,
1284                             sizeof(struct in_addr));
1285                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1286                             ifa->ifa_netmask)->sin_addr.s_addr,
1287                             sizeof(struct in_addr));
1288                         if (ifa->ifa_broadaddr != NULL)
1289                                 memcpy(&n->bcast, &((struct sockaddr_in *)
1290                                     ifa->ifa_broadaddr)->sin_addr.s_addr,
1291                                     sizeof(struct in_addr));
1292                         if (ifa->ifa_dstaddr != NULL)
1293                                 memcpy(&n->peer, &((struct sockaddr_in *)
1294                                     ifa->ifa_dstaddr)->sin_addr.s_addr,
1295                                     sizeof(struct in_addr));
1296                 } else if (n->af == AF_INET6) {
1297                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1298                             ifa->ifa_addr)->sin6_addr.s6_addr,
1299                             sizeof(struct in6_addr));
1300                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1301                             ifa->ifa_netmask)->sin6_addr.s6_addr,
1302                             sizeof(struct in6_addr));
1303                         if (ifa->ifa_broadaddr != NULL)
1304                                 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1305                                     ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1306                                     sizeof(struct in6_addr));
1307                         if (ifa->ifa_dstaddr != NULL)
1308                                  memcpy(&n->peer, &((struct sockaddr_in6 *)
1309                                     ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1310                                     sizeof(struct in6_addr));
1311                         n->ifindex = ((struct sockaddr_in6 *)
1312                             ifa->ifa_addr)->sin6_scope_id;
1313                 } else if (n->af == AF_LINK) {
1314                         ifa_add_groups_to_map(ifa->ifa_name);
1315                 }
1316                 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1317                         err(1, "ifa_load: strdup");
1318                 n->next = NULL;
1319                 n->tail = n;
1320                 if (h == NULL)
1321                         h = n;
1322                 else {
1323                         h->tail->next = n;
1324                         h->tail = n;
1325                 }
1326         }
1327
1328         iftab = h;
1329         freeifaddrs(ifap);
1330 }
1331
1332 static int
1333 get_socket_domain(void)
1334 {
1335         int sdom;
1336
1337         sdom = AF_UNSPEC;
1338 #ifdef WITH_INET6
1339         if (sdom == AF_UNSPEC && feature_present("inet6"))
1340                 sdom = AF_INET6;
1341 #endif
1342 #ifdef WITH_INET
1343         if (sdom == AF_UNSPEC && feature_present("inet"))
1344                 sdom = AF_INET;
1345 #endif
1346         if (sdom == AF_UNSPEC)
1347                 sdom = AF_LINK;
1348
1349         return (sdom);
1350 }
1351
1352 int
1353 get_query_socket(void)
1354 {
1355         static int s = -1;
1356
1357         if (s == -1) {
1358                 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1359                         err(1, "socket");
1360         }
1361
1362         return (s);
1363 }
1364
1365 /*
1366  * Returns the response len if the name is a group, otherwise returns 0.
1367  */
1368 static int
1369 is_a_group(char *name)
1370 {
1371         ENTRY                    item;
1372         ENTRY                   *ret_item;
1373
1374         item.key = name;
1375         if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0)
1376                 return (0);
1377
1378         return (*(int *)ret_item->data);
1379 }
1380
1381 struct node_host *
1382 ifa_exists(char *ifa_name)
1383 {
1384         struct node_host        *n;
1385
1386         if (iftab == NULL)
1387                 ifa_load();
1388
1389         /* check whether this is a group */
1390         if (is_a_group(ifa_name)) {
1391                 /* fake a node_host */
1392                 if ((n = calloc(1, sizeof(*n))) == NULL)
1393                         err(1, "calloc");
1394                 if ((n->ifname = strdup(ifa_name)) == NULL)
1395                         err(1, "strdup");
1396                 return (n);
1397         }
1398
1399         for (n = iftab; n; n = n->next) {
1400                 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1401                         return (n);
1402         }
1403
1404         return (NULL);
1405 }
1406
1407 struct node_host *
1408 ifa_grouplookup(char *ifa_name, int flags)
1409 {
1410         struct ifg_req          *ifg;
1411         struct ifgroupreq        ifgr;
1412         int                      s, len;
1413         struct node_host        *n, *h = NULL;
1414
1415         s = get_query_socket();
1416         len = is_a_group(ifa_name);
1417         if (len == 0)
1418                 return (NULL);
1419         bzero(&ifgr, sizeof(ifgr));
1420         strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1421         ifgr.ifgr_len = len;
1422         if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1423                 err(1, "calloc");
1424         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1425                 err(1, "SIOCGIFGMEMB");
1426
1427         for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1428             ifg++) {
1429                 len -= sizeof(struct ifg_req);
1430                 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1431                         continue;
1432                 if (h == NULL)
1433                         h = n;
1434                 else {
1435                         h->tail->next = n;
1436                         h->tail = n->tail;
1437                 }
1438         }
1439         free(ifgr.ifgr_groups);
1440
1441         return (h);
1442 }
1443
1444 struct node_host *
1445 ifa_lookup(char *ifa_name, int flags)
1446 {
1447         struct node_host        *p = NULL, *h = NULL, *n = NULL;
1448         int                      got4 = 0, got6 = 0;
1449         const char               *last_if = NULL;
1450
1451         /* first load iftab and isgroup_map */
1452         if (iftab == NULL)
1453                 ifa_load();
1454
1455         if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1456                 return (h);
1457
1458         if (!strncmp(ifa_name, "self", IFNAMSIZ))
1459                 ifa_name = NULL;
1460
1461         for (p = iftab; p; p = p->next) {
1462                 if (ifa_skip_if(ifa_name, p))
1463                         continue;
1464                 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1465                         continue;
1466                 if ((flags & PFI_AFLAG_BROADCAST) &&
1467                     !(p->ifa_flags & IFF_BROADCAST))
1468                         continue;
1469                 if ((flags & PFI_AFLAG_PEER) &&
1470                     !(p->ifa_flags & IFF_POINTOPOINT))
1471                         continue;
1472                 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1473                         continue;
1474                 if (last_if == NULL || strcmp(last_if, p->ifname))
1475                         got4 = got6 = 0;
1476                 last_if = p->ifname;
1477                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1478                         continue;
1479                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 &&
1480                     IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6))
1481                         continue;
1482                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1483                         continue;
1484                 if (p->af == AF_INET)
1485                         got4 = 1;
1486                 else
1487                         got6 = 1;
1488                 n = calloc(1, sizeof(struct node_host));
1489                 if (n == NULL)
1490                         err(1, "address: calloc");
1491                 n->af = p->af;
1492                 if (flags & PFI_AFLAG_BROADCAST)
1493                         memcpy(&n->addr.v.a.addr, &p->bcast,
1494                             sizeof(struct pf_addr));
1495                 else if (flags & PFI_AFLAG_PEER)
1496                         memcpy(&n->addr.v.a.addr, &p->peer,
1497                             sizeof(struct pf_addr));
1498                 else
1499                         memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1500                             sizeof(struct pf_addr));
1501                 if (flags & PFI_AFLAG_NETWORK)
1502                         set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1503                 else {
1504                         if (n->af == AF_INET) {
1505                                 if (p->ifa_flags & IFF_LOOPBACK &&
1506                                     p->ifa_flags & IFF_LINK1)
1507                                         memcpy(&n->addr.v.a.mask,
1508                                             &p->addr.v.a.mask,
1509                                             sizeof(struct pf_addr));
1510                                 else
1511                                         set_ipmask(n, 32);
1512                         } else
1513                                 set_ipmask(n, 128);
1514                 }
1515                 n->ifindex = p->ifindex;
1516                 n->ifname = strdup(p->ifname);
1517
1518                 n->next = NULL;
1519                 n->tail = n;
1520                 if (h == NULL)
1521                         h = n;
1522                 else {
1523                         h->tail->next = n;
1524                         h->tail = n;
1525                 }
1526         }
1527         return (h);
1528 }
1529
1530 int
1531 ifa_skip_if(const char *filter, struct node_host *p)
1532 {
1533         int     n;
1534
1535         if (p->af != AF_INET && p->af != AF_INET6)
1536                 return (1);
1537         if (filter == NULL || !*filter)
1538                 return (0);
1539         if (!strcmp(p->ifname, filter))
1540                 return (0);     /* exact match */
1541         n = strlen(filter);
1542         if (n < 1 || n >= IFNAMSIZ)
1543                 return (1);     /* sanity check */
1544         if (filter[n-1] >= '0' && filter[n-1] <= '9')
1545                 return (1);     /* only do exact match in that case */
1546         if (strncmp(p->ifname, filter, n))
1547                 return (1);     /* prefix doesn't match */
1548         return (p->ifname[n] < '0' || p->ifname[n] > '9');
1549 }
1550
1551
1552 struct node_host *
1553 host(const char *s)
1554 {
1555         struct node_host        *h = NULL;
1556         int                      mask, v4mask, v6mask, cont = 1;
1557         char                    *p, *q, *ps;
1558
1559         if ((p = strrchr(s, '/')) != NULL) {
1560                 mask = strtol(p+1, &q, 0);
1561                 if (!q || *q || mask > 128 || q == (p+1)) {
1562                         fprintf(stderr, "invalid netmask '%s'\n", p);
1563                         return (NULL);
1564                 }
1565                 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1566                         err(1, "host: malloc");
1567                 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1568                 v4mask = v6mask = mask;
1569         } else {
1570                 if ((ps = strdup(s)) == NULL)
1571                         err(1, "host: strdup");
1572                 v4mask = 32;
1573                 v6mask = 128;
1574                 mask = -1;
1575         }
1576
1577         /* IPv4 address? */
1578         if (cont && (h = host_v4(s, mask)) != NULL)
1579                 cont = 0;
1580
1581         /* IPv6 address? */
1582         if (cont && (h = host_v6(ps, v6mask)) != NULL)
1583                 cont = 0;
1584
1585         /* interface with this name exists? */
1586         /* expensive with thousands of interfaces - prioritze IPv4/6 check */
1587         if (cont && (h = host_if(ps, mask)) != NULL)
1588                 cont = 0;
1589
1590         /* dns lookup */
1591         if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1592                 cont = 0;
1593         free(ps);
1594
1595         if (h == NULL || cont == 1) {
1596                 fprintf(stderr, "no IP address found for %s\n", s);
1597                 return (NULL);
1598         }
1599         return (h);
1600 }
1601
1602 struct node_host *
1603 host_if(const char *s, int mask)
1604 {
1605         struct node_host        *n, *h = NULL;
1606         char                    *p, *ps;
1607         int                      flags = 0;
1608
1609         if ((ps = strdup(s)) == NULL)
1610                 err(1, "host_if: strdup");
1611         while ((p = strrchr(ps, ':')) != NULL) {
1612                 if (!strcmp(p+1, "network"))
1613                         flags |= PFI_AFLAG_NETWORK;
1614                 else if (!strcmp(p+1, "broadcast"))
1615                         flags |= PFI_AFLAG_BROADCAST;
1616                 else if (!strcmp(p+1, "peer"))
1617                         flags |= PFI_AFLAG_PEER;
1618                 else if (!strcmp(p+1, "0"))
1619                         flags |= PFI_AFLAG_NOALIAS;
1620                 else {
1621                         free(ps);
1622                         return (NULL);
1623                 }
1624                 *p = '\0';
1625         }
1626         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1627                 fprintf(stderr, "illegal combination of interface modifiers\n");
1628                 free(ps);
1629                 return (NULL);
1630         }
1631         if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1632                 fprintf(stderr, "network or broadcast lookup, but "
1633                     "extra netmask given\n");
1634                 free(ps);
1635                 return (NULL);
1636         }
1637         if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1638                 /* interface with this name exists */
1639                 h = ifa_lookup(ps, flags);
1640                 for (n = h; n != NULL && mask > -1; n = n->next)
1641                         set_ipmask(n, mask);
1642         }
1643
1644         free(ps);
1645         return (h);
1646 }
1647
1648 struct node_host *
1649 host_v4(const char *s, int mask)
1650 {
1651         struct node_host        *h = NULL;
1652         struct in_addr           ina;
1653         int                      bits = 32;
1654
1655         memset(&ina, 0, sizeof(struct in_addr));
1656         if (strrchr(s, '/') != NULL) {
1657                 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1658                         return (NULL);
1659         } else {
1660                 if (inet_pton(AF_INET, s, &ina) != 1)
1661                         return (NULL);
1662         }
1663
1664         h = calloc(1, sizeof(struct node_host));
1665         if (h == NULL)
1666                 err(1, "address: calloc");
1667         h->ifname = NULL;
1668         h->af = AF_INET;
1669         h->addr.v.a.addr.addr32[0] = ina.s_addr;
1670         set_ipmask(h, bits);
1671         h->next = NULL;
1672         h->tail = h;
1673
1674         return (h);
1675 }
1676
1677 struct node_host *
1678 host_v6(const char *s, int mask)
1679 {
1680         struct addrinfo          hints, *res;
1681         struct node_host        *h = NULL;
1682
1683         memset(&hints, 0, sizeof(hints));
1684         hints.ai_family = AF_INET6;
1685         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1686         hints.ai_flags = AI_NUMERICHOST;
1687         if (getaddrinfo(s, "0", &hints, &res) == 0) {
1688                 h = calloc(1, sizeof(struct node_host));
1689                 if (h == NULL)
1690                         err(1, "address: calloc");
1691                 h->ifname = NULL;
1692                 h->af = AF_INET6;
1693                 memcpy(&h->addr.v.a.addr,
1694                     &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1695                     sizeof(h->addr.v.a.addr));
1696                 h->ifindex =
1697                     ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1698                 set_ipmask(h, mask);
1699                 freeaddrinfo(res);
1700                 h->next = NULL;
1701                 h->tail = h;
1702         }
1703
1704         return (h);
1705 }
1706
1707 struct node_host *
1708 host_dns(const char *s, int v4mask, int v6mask)
1709 {
1710         struct addrinfo          hints, *res0, *res;
1711         struct node_host        *n, *h = NULL;
1712         int                      error, noalias = 0;
1713         int                      got4 = 0, got6 = 0;
1714         char                    *p, *ps;
1715
1716         if ((ps = strdup(s)) == NULL)
1717                 err(1, "host_dns: strdup");
1718         if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1719                 noalias = 1;
1720                 *p = '\0';
1721         }
1722         memset(&hints, 0, sizeof(hints));
1723         hints.ai_family = PF_UNSPEC;
1724         hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1725         error = getaddrinfo(ps, NULL, &hints, &res0);
1726         if (error) {
1727                 free(ps);
1728                 return (h);
1729         }
1730
1731         for (res = res0; res; res = res->ai_next) {
1732                 if (res->ai_family != AF_INET &&
1733                     res->ai_family != AF_INET6)
1734                         continue;
1735                 if (noalias) {
1736                         if (res->ai_family == AF_INET) {
1737                                 if (got4)
1738                                         continue;
1739                                 got4 = 1;
1740                         } else {
1741                                 if (got6)
1742                                         continue;
1743                                 got6 = 1;
1744                         }
1745                 }
1746                 n = calloc(1, sizeof(struct node_host));
1747                 if (n == NULL)
1748                         err(1, "host_dns: calloc");
1749                 n->ifname = NULL;
1750                 n->af = res->ai_family;
1751                 if (res->ai_family == AF_INET) {
1752                         memcpy(&n->addr.v.a.addr,
1753                             &((struct sockaddr_in *)
1754                             res->ai_addr)->sin_addr.s_addr,
1755                             sizeof(struct in_addr));
1756                         set_ipmask(n, v4mask);
1757                 } else {
1758                         memcpy(&n->addr.v.a.addr,
1759                             &((struct sockaddr_in6 *)
1760                             res->ai_addr)->sin6_addr.s6_addr,
1761                             sizeof(struct in6_addr));
1762                         n->ifindex =
1763                             ((struct sockaddr_in6 *)
1764                             res->ai_addr)->sin6_scope_id;
1765                         set_ipmask(n, v6mask);
1766                 }
1767                 n->next = NULL;
1768                 n->tail = n;
1769                 if (h == NULL)
1770                         h = n;
1771                 else {
1772                         h->tail->next = n;
1773                         h->tail = n;
1774                 }
1775         }
1776         freeaddrinfo(res0);
1777         free(ps);
1778
1779         return (h);
1780 }
1781
1782 /*
1783  * convert a hostname to a list of addresses and put them in the given buffer.
1784  * test:
1785  *      if set to 1, only simple addresses are accepted (no netblock, no "!").
1786  */
1787 int
1788 append_addr(struct pfr_buffer *b, char *s, int test)
1789 {
1790         char                     *r;
1791         struct node_host        *h, *n;
1792         int                      rv, not = 0;
1793
1794         for (r = s; *r == '!'; r++)
1795                 not = !not;
1796         if ((n = host(r)) == NULL) {
1797                 errno = 0;
1798                 return (-1);
1799         }
1800         rv = append_addr_host(b, n, test, not);
1801         do {
1802                 h = n;
1803                 n = n->next;
1804                 free(h);
1805         } while (n != NULL);
1806         return (rv);
1807 }
1808
1809 /*
1810  * same as previous function, but with a pre-parsed input and the ability
1811  * to "negate" the result. Does not free the node_host list.
1812  * not:
1813  *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1814  */
1815 int
1816 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1817 {
1818         int                      bits;
1819         struct pfr_addr          addr;
1820
1821         do {
1822                 bzero(&addr, sizeof(addr));
1823                 addr.pfra_not = n->not ^ not;
1824                 addr.pfra_af = n->af;
1825                 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1826                 switch (n->af) {
1827                 case AF_INET:
1828                         addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1829                         bits = 32;
1830                         break;
1831                 case AF_INET6:
1832                         memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1833                             sizeof(struct in6_addr));
1834                         bits = 128;
1835                         break;
1836                 default:
1837                         errno = EINVAL;
1838                         return (-1);
1839                 }
1840                 if ((test && (not || addr.pfra_net != bits)) ||
1841                     addr.pfra_net > bits) {
1842                         errno = EINVAL;
1843                         return (-1);
1844                 }
1845                 if (pfr_buf_add(b, &addr))
1846                         return (-1);
1847         } while ((n = n->next) != NULL);
1848
1849         return (0);
1850 }
1851
1852 int
1853 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1854 {
1855         struct pfioc_trans_e trans;
1856
1857         bzero(&trans, sizeof(trans));
1858         trans.rs_num = rs_num;
1859         if (strlcpy(trans.anchor, anchor,
1860             sizeof(trans.anchor)) >= sizeof(trans.anchor))
1861                 errx(1, "pfctl_add_trans: strlcpy");
1862
1863         return pfr_buf_add(buf, &trans);
1864 }
1865
1866 u_int32_t
1867 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1868 {
1869         struct pfioc_trans_e *p;
1870
1871         PFRB_FOREACH(p, buf)
1872                 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1873                         return (p->ticket);
1874         errx(1, "pfctl_get_ticket: assertion failed");
1875 }
1876
1877 int
1878 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1879 {
1880         struct pfioc_trans trans;
1881
1882         bzero(&trans, sizeof(trans));
1883         trans.size = buf->pfrb_size - from;
1884         trans.esize = sizeof(struct pfioc_trans_e);
1885         trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1886         return ioctl(dev, cmd, &trans);
1887 }