usr.sbin/pfctl/pfctl_parser.c

   1 /*      $OpenBSD: pfctl_parser.c,v 1.194.2.1 2004/05/05 04:00:50 brad Exp $ */
   2 /*      $DragonFly: src/usr.sbin/pfctl/pfctl_parser.c,v 1.1 2004/09/21 21:25:28 joerg Exp $ */
   3
   4 /*
   5  * Copyright (c) 2001 Daniel Hartmeier
   6  * Copyright (c) 2002,2003 Henning Brauer
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  *    - Redistributions of source code must retain the above copyright
  14  *      notice, this list of conditions and the following disclaimer.
  15  *    - Redistributions in binary form must reproduce the above
  16  *      copyright notice, this list of conditions and the following
  17  *      disclaimer in the documentation and/or other materials provided
  18  *      with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <sys/param.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/socket.h>
  38 #include <net/if.h>
  39 #include <netinet/in.h>
  40 #include <netinet/in_systm.h>
  41 #include <netinet/ip.h>
  42 #include <netinet/ip_icmp.h>
  43 #include <netinet/icmp6.h>
  44 #include <net/pf/pfvar.h>
  45 #include <arpa/inet.h>
  46
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <ctype.h>
  51 #include <netdb.h>
  52 #include <stdarg.h>
  53 #include <errno.h>
  54 #include <err.h>
  55 #include <ifaddrs.h>
  56
  57 #include "pfctl_parser.h"
  58 #include "pfctl.h"
  59
  60 void             print_op (u_int8_t, const char *, const char *);
  61 void             print_port (u_int8_t, u_int16_t, u_int16_t, const char *);
  62 void             print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
  63 void             print_flags (u_int8_t);
  64 void             print_fromto(struct pf_rule_addr *, pf_osfp_t,
  65                     struct pf_rule_addr *, u_int8_t, u_int8_t, int);
  66 int              ifa_skip_if(const char *filter, struct node_host *p);
  67
  68 struct node_host        *host_if(const char *, int);
  69 static struct node_host *host_v4(const char *);
  70 struct node_host        *host_v6(const char *, int);
  71 struct node_host        *host_dns(const char *, int, int);
  72
  73 const char *tcpflags = "FSRPAUEW";
  74
  75 static const struct icmptypeent icmp_type[] = {
  76         { "echoreq",    ICMP_ECHO },
  77         { "echorep",    ICMP_ECHOREPLY },
  78         { "unreach",    ICMP_UNREACH },
  79         { "squench",    ICMP_SOURCEQUENCH },
  80         { "redir",      ICMP_REDIRECT },
  81         { "althost",    ICMP_ALTHOSTADDR },
  82         { "routeradv",  ICMP_ROUTERADVERT },
  83         { "routersol",  ICMP_ROUTERSOLICIT },
  84         { "timex",      ICMP_TIMXCEED },
  85         { "paramprob",  ICMP_PARAMPROB },
  86         { "timereq",    ICMP_TSTAMP },
  87         { "timerep",    ICMP_TSTAMPREPLY },
  88         { "inforeq",    ICMP_IREQ },
  89         { "inforep",    ICMP_IREQREPLY },
  90         { "maskreq",    ICMP_MASKREQ },
  91         { "maskrep",    ICMP_MASKREPLY },
  92         { "trace",      ICMP_TRACEROUTE },
  93         { "dataconv",   ICMP_DATACONVERR },
  94         { "mobredir",   ICMP_MOBILE_REDIRECT },
  95         { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
  96         { "ipv6-here",  ICMP_IPV6_IAMHERE },
  97         { "mobregreq",  ICMP_MOBILE_REGREQUEST },
  98         { "mobregrep",  ICMP_MOBILE_REGREPLY },
  99         { "skip",       ICMP_SKIP },
 100         { "photuris",   ICMP_PHOTURIS }
 101 };
 102
 103 static const struct icmptypeent icmp6_type[] = {
 104         { "unreach",    ICMP6_DST_UNREACH },
 105         { "toobig",     ICMP6_PACKET_TOO_BIG },
 106         { "timex",      ICMP6_TIME_EXCEEDED },
 107         { "paramprob",  ICMP6_PARAM_PROB },
 108         { "echoreq",    ICMP6_ECHO_REQUEST },
 109         { "echorep",    ICMP6_ECHO_REPLY },
 110         { "groupqry",   ICMP6_MEMBERSHIP_QUERY },
 111         { "listqry",    MLD_LISTENER_QUERY },
 112         { "grouprep",   ICMP6_MEMBERSHIP_REPORT },
 113         { "listenrep",  MLD_LISTENER_REPORT },
 114         { "groupterm",  ICMP6_MEMBERSHIP_REDUCTION },
 115         { "listendone", MLD_LISTENER_DONE },
 116         { "routersol",  ND_ROUTER_SOLICIT },
 117         { "routeradv",  ND_ROUTER_ADVERT },
 118         { "neighbrsol", ND_NEIGHBOR_SOLICIT },
 119         { "neighbradv", ND_NEIGHBOR_ADVERT },
 120         { "redir",      ND_REDIRECT },
 121         { "routrrenum", ICMP6_ROUTER_RENUMBERING },
 122         { "wrureq",     ICMP6_WRUREQUEST },
 123         { "wrurep",     ICMP6_WRUREPLY },
 124         { "fqdnreq",    ICMP6_FQDN_QUERY },
 125         { "fqdnrep",    ICMP6_FQDN_REPLY },
 126         { "niqry",      ICMP6_NI_QUERY },
 127         { "nirep",      ICMP6_NI_REPLY },
 128         { "mtraceresp", MLD_MTRACE_RESP },
 129         { "mtrace",     MLD_MTRACE }
 130 };
 131
 132 static const struct icmpcodeent icmp_code[] = {
 133         { "net-unr",            ICMP_UNREACH,   ICMP_UNREACH_NET },
 134         { "host-unr",           ICMP_UNREACH,   ICMP_UNREACH_HOST },
 135         { "proto-unr",          ICMP_UNREACH,   ICMP_UNREACH_PROTOCOL },
 136         { "port-unr",           ICMP_UNREACH,   ICMP_UNREACH_PORT },
 137         { "needfrag",           ICMP_UNREACH,   ICMP_UNREACH_NEEDFRAG },
 138         { "srcfail",            ICMP_UNREACH,   ICMP_UNREACH_SRCFAIL },
 139         { "net-unk",            ICMP_UNREACH,   ICMP_UNREACH_NET_UNKNOWN },
 140         { "host-unk",           ICMP_UNREACH,   ICMP_UNREACH_HOST_UNKNOWN },
 141         { "isolate",            ICMP_UNREACH,   ICMP_UNREACH_ISOLATED },
 142         { "net-prohib",         ICMP_UNREACH,   ICMP_UNREACH_NET_PROHIB },
 143         { "host-prohib",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PROHIB },
 144         { "net-tos",            ICMP_UNREACH,   ICMP_UNREACH_TOSNET },
 145         { "host-tos",           ICMP_UNREACH,   ICMP_UNREACH_TOSHOST },
 146         { "filter-prohib",      ICMP_UNREACH,   ICMP_UNREACH_FILTER_PROHIB },
 147         { "host-preced",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PRECEDENCE },
 148         { "cutoff-preced",      ICMP_UNREACH,   ICMP_UNREACH_PRECEDENCE_CUTOFF },
 149         { "redir-net",          ICMP_REDIRECT,  ICMP_REDIRECT_NET },
 150         { "redir-host",         ICMP_REDIRECT,  ICMP_REDIRECT_HOST },
 151         { "redir-tos-net",      ICMP_REDIRECT,  ICMP_REDIRECT_TOSNET },
 152         { "redir-tos-host",     ICMP_REDIRECT,  ICMP_REDIRECT_TOSHOST },
 153         { "normal-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
 154         { "common-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
 155         { "transit",            ICMP_TIMXCEED,  ICMP_TIMXCEED_INTRANS },
 156         { "reassemb",           ICMP_TIMXCEED,  ICMP_TIMXCEED_REASS },
 157         { "badhead",            ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
 158         { "optmiss",            ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
 159         { "badlen",             ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
 160         { "unknown-ind",        ICMP_PHOTURIS,  ICMP_PHOTURIS_UNKNOWN_INDEX },
 161         { "auth-fail",          ICMP_PHOTURIS,  ICMP_PHOTURIS_AUTH_FAILED },
 162         { "decrypt-fail",       ICMP_PHOTURIS,  ICMP_PHOTURIS_DECRYPT_FAILED }
 163 };
 164
 165 static const struct icmpcodeent icmp6_code[] = {
 166         { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
 167         { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
 168         { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
 169         { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
 170         { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
 171         { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
 172         { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
 173         { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
 174         { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
 175         { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
 176         { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
 177         { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
 178 };
 179
 180 const struct pf_timeout pf_timeouts[] = {
 181         { "tcp.first",          PFTM_TCP_FIRST_PACKET },
 182         { "tcp.opening",        PFTM_TCP_OPENING },
 183         { "tcp.established",    PFTM_TCP_ESTABLISHED },
 184         { "tcp.closing",        PFTM_TCP_CLOSING },
 185         { "tcp.finwait",        PFTM_TCP_FIN_WAIT },
 186         { "tcp.closed",         PFTM_TCP_CLOSED },
 187         { "udp.first",          PFTM_UDP_FIRST_PACKET },
 188         { "udp.single",         PFTM_UDP_SINGLE },
 189         { "udp.multiple",       PFTM_UDP_MULTIPLE },
 190         { "icmp.first",         PFTM_ICMP_FIRST_PACKET },
 191         { "icmp.error",         PFTM_ICMP_ERROR_REPLY },
 192         { "other.first",        PFTM_OTHER_FIRST_PACKET },
 193         { "other.single",       PFTM_OTHER_SINGLE },
 194         { "other.multiple",     PFTM_OTHER_MULTIPLE },
 195         { "frag",               PFTM_FRAG },
 196         { "interval",           PFTM_INTERVAL },
 197         { "adaptive.start",     PFTM_ADAPTIVE_START },
 198         { "adaptive.end",       PFTM_ADAPTIVE_END },
 199         { "src.track",          PFTM_SRC_NODE },
 200         { NULL,                 0 }
 201 };
 202
 203 const struct icmptypeent *
 204 geticmptypebynumber(u_int8_t type, sa_family_t af)
 205 {
 206         unsigned int    i;
 207
 208         if (af != AF_INET6) {
 209                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 210                     i++) {
 211                         if (type == icmp_type[i].type)
 212                                 return (&icmp_type[i]);
 213                 }
 214         } else {
 215                 for (i=0; i < (sizeof (icmp6_type) /
 216                     sizeof(icmp6_type[0])); i++) {
 217                         if (type == icmp6_type[i].type)
 218                                  return (&icmp6_type[i]);
 219                 }
 220         }
 221         return (NULL);
 222 }
 223
 224 const struct icmptypeent *
 225 geticmptypebyname(char *w, sa_family_t af)
 226 {
 227         unsigned int    i;
 228
 229         if (af != AF_INET6) {
 230                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 231                     i++) {
 232                         if (!strcmp(w, icmp_type[i].name))
 233                                 return (&icmp_type[i]);
 234                 }
 235         } else {
 236                 for (i=0; i < (sizeof (icmp6_type) /
 237                     sizeof(icmp6_type[0])); i++) {
 238                         if (!strcmp(w, icmp6_type[i].name))
 239                                 return (&icmp6_type[i]);
 240                 }
 241         }
 242         return (NULL);
 243 }
 244
 245 const struct icmpcodeent *
 246 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
 247 {
 248         unsigned int    i;
 249
 250         if (af != AF_INET6) {
 251                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 252                     i++) {
 253                         if (type == icmp_code[i].type &&
 254                             code == icmp_code[i].code)
 255                                 return (&icmp_code[i]);
 256                 }
 257         } else {
 258                 for (i=0; i < (sizeof (icmp6_code) /
 259                     sizeof(icmp6_code[0])); i++) {
 260                         if (type == icmp6_code[i].type &&
 261                             code == icmp6_code[i].code)
 262                                 return (&icmp6_code[i]);
 263                 }
 264         }
 265         return (NULL);
 266 }
 267
 268 const struct icmpcodeent *
 269 geticmpcodebyname(u_long type, char *w, sa_family_t af)
 270 {
 271         unsigned int    i;
 272
 273         if (af != AF_INET6) {
 274                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 275                     i++) {
 276                         if (type == icmp_code[i].type &&
 277                             !strcmp(w, icmp_code[i].name))
 278                                 return (&icmp_code[i]);
 279                 }
 280         } else {
 281                 for (i=0; i < (sizeof (icmp6_code) /
 282                     sizeof(icmp6_code[0])); i++) {
 283                         if (type == icmp6_code[i].type &&
 284                             !strcmp(w, icmp6_code[i].name))
 285                                 return (&icmp6_code[i]);
 286                 }
 287         }
 288         return (NULL);
 289 }
 290
 291 void
 292 print_op(u_int8_t op, const char *a1, const char *a2)
 293 {
 294         if (op == PF_OP_IRG)
 295                 printf(" %s >< %s", a1, a2);
 296         else if (op == PF_OP_XRG)
 297                 printf(" %s <> %s", a1, a2);
 298         else if (op == PF_OP_EQ)
 299                 printf(" = %s", a1);
 300         else if (op == PF_OP_NE)
 301                 printf(" != %s", a1);
 302         else if (op == PF_OP_LT)
 303                 printf(" < %s", a1);
 304         else if (op == PF_OP_LE)
 305                 printf(" <= %s", a1);
 306         else if (op == PF_OP_GT)
 307                 printf(" > %s", a1);
 308         else if (op == PF_OP_GE)
 309                 printf(" >= %s", a1);
 310         else if (op == PF_OP_RRG)
 311                 printf(" %s:%s", a1, a2);
 312 }
 313
 314 void
 315 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto)
 316 {
 317         char             a1[6], a2[6];
 318         struct servent  *s;
 319
 320         s = getservbyport(p1, proto);
 321         p1 = ntohs(p1);
 322         p2 = ntohs(p2);
 323         snprintf(a1, sizeof(a1), "%u", p1);
 324         snprintf(a2, sizeof(a2), "%u", p2);
 325         printf(" port");
 326         if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
 327                 print_op(op, s->s_name, a2);
 328         else
 329                 print_op(op, a1, a2);
 330 }
 331
 332 void
 333 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
 334 {
 335         char    a1[11], a2[11];
 336
 337         snprintf(a1, sizeof(a1), "%u", u1);
 338         snprintf(a2, sizeof(a2), "%u", u2);
 339         printf(" %s", t);
 340         if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
 341                 print_op(op, "unknown", a2);
 342         else
 343                 print_op(op, a1, a2);
 344 }
 345
 346 void
 347 print_flags(u_int8_t f)
 348 {
 349         int     i;
 350
 351         for (i = 0; tcpflags[i]; ++i)
 352                 if (f & (1 << i))
 353                         printf("%c", tcpflags[i]);
 354 }
 355
 356 void
 357 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
 358     sa_family_t af, u_int8_t proto, int verbose)
 359 {
 360         char buf[PF_OSFP_LEN*3];
 361         if (src->addr.type == PF_ADDR_ADDRMASK &&
 362             dst->addr.type == PF_ADDR_ADDRMASK &&
 363             PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
 364             PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
 365             PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
 366             PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
 367             !src->not && !dst->not &&
 368             !src->port_op && !dst->port_op &&
 369             osfp == PF_OSFP_ANY)
 370                 printf(" all");
 371         else {
 372                 printf(" from ");
 373                 if (src->not)
 374                         printf("! ");
 375                 print_addr(&src->addr, af, verbose);
 376                 if (src->port_op)
 377                         print_port(src->port_op, src->port[0],
 378                             src->port[1],
 379                             proto == IPPROTO_TCP ? "tcp" : "udp");
 380                 if (osfp != PF_OSFP_ANY)
 381                         printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
 382                             sizeof(buf)));
 383
 384                 printf(" to ");
 385                 if (dst->not)
 386                         printf("! ");
 387                 print_addr(&dst->addr, af, verbose);
 388                 if (dst->port_op)
 389                         print_port(dst->port_op, dst->port[0],
 390                             dst->port[1],
 391                             proto == IPPROTO_TCP ? "tcp" : "udp");
 392         }
 393 }
 394
 395 void
 396 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
 397     sa_family_t af, int id)
 398 {
 399         struct pf_pooladdr      *pooladdr;
 400
 401         if ((TAILQ_FIRST(&pool->list) != NULL) &&
 402             TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 403                 printf("{ ");
 404         TAILQ_FOREACH(pooladdr, &pool->list, entries){
 405                 switch (id) {
 406                 case PF_NAT:
 407                 case PF_RDR:
 408                 case PF_BINAT:
 409                         print_addr(&pooladdr->addr, af, 0);
 410                         break;
 411                 case PF_PASS:
 412                         if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
 413                                 printf("%s", pooladdr->ifname);
 414                         else {
 415                                 printf("(%s ", pooladdr->ifname);
 416                                 print_addr(&pooladdr->addr, af, 0);
 417                                 printf(")");
 418                         }
 419                         break;
 420                 default:
 421                         break;
 422                 }
 423                 if (TAILQ_NEXT(pooladdr, entries) != NULL)
 424                         printf(", ");
 425                 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 426                         printf(" }");
 427         }
 428         switch (id) {
 429         case PF_NAT:
 430                 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
 431                     p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
 432                         if (p1 == p2)
 433                                 printf(" port %u", p1);
 434                         else
 435                                 printf(" port %u:%u", p1, p2);
 436                 }
 437                 break;
 438         case PF_RDR:
 439                 if (p1) {
 440                         printf(" port %u", p1);
 441                         if (p2 && (p2 != p1))
 442                                 printf(":%u", p2);
 443                 }
 444                 break;
 445         default:
 446                 break;
 447         }
 448         switch (pool->opts & PF_POOL_TYPEMASK) {
 449         case PF_POOL_NONE:
 450                 break;
 451         case PF_POOL_BITMASK:
 452                 printf(" bitmask");
 453                 break;
 454         case PF_POOL_RANDOM:
 455                 printf(" random");
 456                 break;
 457         case PF_POOL_SRCHASH:
 458                 printf(" source-hash 0x%08x%08x%08x%08x",
 459                     pool->key.key32[0], pool->key.key32[1],
 460                     pool->key.key32[2], pool->key.key32[3]);
 461                 break;
 462         case PF_POOL_ROUNDROBIN:
 463                 printf(" round-robin");
 464                 break;
 465         }
 466         if (pool->opts & PF_POOL_STICKYADDR)
 467                 printf(" sticky-address");
 468         if (id == PF_NAT && p1 == 0 && p2 == 0)
 469                 printf(" static-port");
 470 }
 471
 472 const char      *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
 473 const char      *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
 474 const char      *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
 475
 476 void
 477 print_status(struct pf_status *s, int opts)
 478 {
 479         char    statline[80];
 480         const char *running;
 481         time_t  runtime;
 482         int     i;
 483
 484         runtime = time(NULL) - s->since;
 485         running = s->running ? "Enabled" : "Disabled";
 486
 487         if (s->since) {
 488                 unsigned        sec, min, hrs, day = runtime;
 489
 490                 sec = day % 60;
 491                 day /= 60;
 492                 min = day % 60;
 493                 day /= 60;
 494                 hrs = day % 24;
 495                 day /= 24;
 496                 snprintf(statline, sizeof(statline),
 497                     "Status: %s for %u days %.2u:%.2u:%.2u",
 498                     running, day, hrs, min, sec);
 499         } else
 500                 snprintf(statline, sizeof(statline), "Status: %s", running);
 501         printf("%-44s", statline);
 502         switch (s->debug) {
 503         case PF_DEBUG_NONE:
 504                 printf("%15s\n\n", "Debug: None");
 505                 break;
 506         case PF_DEBUG_URGENT:
 507                 printf("%15s\n\n", "Debug: Urgent");
 508                 break;
 509         case PF_DEBUG_MISC:
 510                 printf("%15s\n\n", "Debug: Misc");
 511                 break;
 512         case PF_DEBUG_NOISY:
 513                 printf("%15s\n\n", "Debug: Loud");
 514                 break;
 515         }
 516         printf("Hostid: 0x%08x\n\n", ntohl(s->hostid));
 517         if (s->ifname[0] != 0) {
 518                 printf("Interface Stats for %-16s %5s %16s\n",
 519                     s->ifname, "IPv4", "IPv6");
 520                 printf("  %-25s %14llu %16llu\n", "Bytes In",
 521                     (unsigned long long)s->bcounters[0][0],
 522                     (unsigned long long)s->bcounters[1][0]);
 523                 printf("  %-25s %14llu %16llu\n", "Bytes Out",
 524                     (unsigned long long)s->bcounters[0][1],
 525                     (unsigned long long)s->bcounters[1][1]);
 526                 printf("  Packets In\n");
 527                 printf("    %-23s %14llu %16llu\n", "Passed",
 528                     (unsigned long long)s->pcounters[0][0][PF_PASS],
 529                     (unsigned long long)s->pcounters[1][0][PF_PASS]);
 530                 printf("    %-23s %14llu %16llu\n", "Blocked",
 531                     (unsigned long long)s->pcounters[0][0][PF_DROP],
 532                     (unsigned long long)s->pcounters[1][0][PF_DROP]);
 533                 printf("  Packets Out\n");
 534                 printf("    %-23s %14llu %16llu\n", "Passed",
 535                     (unsigned long long)s->pcounters[0][1][PF_PASS],
 536                     (unsigned long long)s->pcounters[1][1][PF_PASS]);
 537                 printf("    %-23s %14llu %16llu\n\n", "Blocked",
 538                     (unsigned long long)s->pcounters[0][1][PF_DROP],
 539                     (unsigned long long)s->pcounters[1][1][PF_DROP]);
 540         }
 541         printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
 542         printf("  %-25s %14u %14s\n", "current entries", s->states, "");
 543         for (i = 0; i < FCNT_MAX; i++) {
 544                 printf("  %-25s %14llu ", pf_fcounters[i],
 545                             (unsigned long long)s->fcounters[i]);
 546                 if (runtime > 0)
 547                         printf("%14.1f/s\n",
 548                             (double)s->fcounters[i] / (double)runtime);
 549                 else
 550                         printf("%14s\n", "");
 551         }
 552         if (opts & PF_OPT_VERBOSE) {
 553                 printf("Source Tracking Table\n");
 554                 printf("  %-25s %14u %14s\n", "current entries",
 555                     s->src_nodes, "");
 556                 for (i = 0; i < SCNT_MAX; i++) {
 557                         printf("  %-25s %14lld ", pf_scounters[i],
 558                                     s->scounters[i]);
 559                         if (runtime > 0)
 560                                 printf("%14.1f/s\n",
 561                                     (double)s->scounters[i] / (double)runtime);
 562                         else
 563                                 printf("%14s\n", "");
 564                 }
 565         }
 566         printf("Counters\n");
 567         for (i = 0; i < PFRES_MAX; i++) {
 568                 printf("  %-25s %14llu ", pf_reasons[i],
 569                     (unsigned long long)s->counters[i]);
 570                 if (runtime > 0)
 571                         printf("%14.1f/s\n",
 572                             (double)s->counters[i] / (double)runtime);
 573                 else
 574                         printf("%14s\n", "");
 575         }
 576 }
 577
 578 void
 579 print_src_node(struct pf_src_node *sn, int opts)
 580 {
 581         struct pf_addr_wrap aw;
 582         int min, sec;
 583
 584         memset(&aw, 0, sizeof(aw));
 585         if (sn->af == AF_INET)
 586                 aw.v.a.mask.addr32[0] = 0xffffffff;
 587         else
 588                 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
 589
 590         aw.v.a.addr = sn->addr;
 591         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 592         printf(" -> ");
 593         aw.v.a.addr = sn->raddr;
 594         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 595         printf(" (%d states)\n", sn->states);
 596         if (opts & PF_OPT_VERBOSE) {
 597                 sec = sn->creation % 60;
 598                 sn->creation /= 60;
 599                 min = sn->creation % 60;
 600                 sn->creation /= 60;
 601                 printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
 602                 if (sn->states == 0) {
 603                         sec = sn->expire % 60;
 604                         sn->expire /= 60;
 605                         min = sn->expire % 60;
 606                         sn->expire /= 60;
 607                         printf(", expires in %.2u:%.2u:%.2u",
 608                             sn->expire, min, sec);
 609                 }
 610                 printf(", %u pkts, %u bytes", sn->packets, sn->bytes);
 611                 switch (sn->ruletype) {
 612                 case PF_NAT:
 613                         if (sn->rule.nr != (uint32_t)(-1))
 614                                 printf(", nat rule %u", sn->rule.nr);
 615                         break;
 616                 case PF_RDR:
 617                         if (sn->rule.nr != (uint32_t)(-1))
 618                                 printf(", rdr rule %u", sn->rule.nr);
 619                         break;
 620                 case PF_PASS:
 621                         if (sn->rule.nr != (uint32_t)(-1))
 622                                 printf(", filter rule %u", sn->rule.nr);
 623                         break;
 624                 }
 625                 printf("\n");
 626         }
 627 }
 628
 629 void
 630 print_rule(struct pf_rule *r, int verbose)
 631 {
 632         static const char *actiontypes[] = { "pass", "block", "scrub", "nat",
 633             "no nat", "binat", "no binat", "rdr", "no rdr" };
 634         static const char *anchortypes[] = { "anchor", "anchor", "anchor",
 635             "nat-anchor", "nat-anchor", "binat-anchor", "binat-anchor",
 636             "rdr-anchor", "rdr-anchor" };
 637         int     i, opts;
 638
 639         if (verbose)
 640                 printf("@%d ", r->nr);
 641         if (r->action > PF_NORDR)
 642                 printf("action(%d)", r->action);
 643         else if (r->anchorname[0])
 644                 printf("%s %s", anchortypes[r->action], r->anchorname);
 645         else {
 646                 printf("%s", actiontypes[r->action]);
 647                 if (r->natpass)
 648                         printf(" pass");
 649         }
 650         if (r->action == PF_DROP) {
 651                 if (r->rule_flag & PFRULE_RETURN)
 652                         printf(" return");
 653                 else if (r->rule_flag & PFRULE_RETURNRST) {
 654                         if (!r->return_ttl)
 655                                 printf(" return-rst");
 656                         else
 657                                 printf(" return-rst(ttl %d)", r->return_ttl);
 658                 } else if (r->rule_flag & PFRULE_RETURNICMP) {
 659                         const struct icmpcodeent        *ic, *ic6;
 660
 661                         ic = geticmpcodebynumber(r->return_icmp >> 8,
 662                             r->return_icmp & 255, AF_INET);
 663                         ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
 664                             r->return_icmp6 & 255, AF_INET6);
 665
 666                         switch (r->af) {
 667                         case AF_INET:
 668                                 printf(" return-icmp");
 669                                 if (ic == NULL)
 670                                         printf("(%u)", r->return_icmp & 255);
 671                                 else
 672                                         printf("(%s)", ic->name);
 673                                 break;
 674                         case AF_INET6:
 675                                 printf(" return-icmp6");
 676                                 if (ic6 == NULL)
 677                                         printf("(%u)", r->return_icmp6 & 255);
 678                                 else
 679                                         printf("(%s)", ic6->name);
 680                                 break;
 681                         default:
 682                                 printf(" return-icmp");
 683                                 if (ic == NULL)
 684                                         printf("(%u, ", r->return_icmp & 255);
 685                                 else
 686                                         printf("(%s, ", ic->name);
 687                                 if (ic6 == NULL)
 688                                         printf("%u)", r->return_icmp6 & 255);
 689                                 else
 690                                         printf("%s)", ic6->name);
 691                                 break;
 692                         }
 693                 } else
 694                         printf(" drop");
 695         }
 696         if (r->direction == PF_IN)
 697                 printf(" in");
 698         else if (r->direction == PF_OUT)
 699                 printf(" out");
 700         if (r->log == 1)
 701                 printf(" log");
 702         else if (r->log == 2)
 703                 printf(" log-all");
 704         if (r->quick)
 705                 printf(" quick");
 706         if (r->ifname[0]) {
 707                 if (r->ifnot)
 708                         printf(" on ! %s", r->ifname);
 709                 else
 710                         printf(" on %s", r->ifname);
 711         }
 712         if (r->rt) {
 713                 if (r->rt == PF_ROUTETO)
 714                         printf(" route-to");
 715                 else if (r->rt == PF_REPLYTO)
 716                         printf(" reply-to");
 717                 else if (r->rt == PF_DUPTO)
 718                         printf(" dup-to");
 719                 else if (r->rt == PF_FASTROUTE)
 720                         printf(" fastroute");
 721                 if (r->rt != PF_FASTROUTE) {
 722                         printf(" ");
 723                         print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
 724                 }
 725         }
 726         if (r->af) {
 727                 if (r->af == AF_INET)
 728                         printf(" inet");
 729                 else
 730                         printf(" inet6");
 731         }
 732         if (r->proto) {
 733                 struct protoent *p;
 734
 735                 if ((p = getprotobynumber(r->proto)) != NULL)
 736                         printf(" proto %s", p->p_name);
 737                 else
 738                         printf(" proto %u", r->proto);
 739         }
 740         print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
 741             verbose);
 742         if (r->uid.op)
 743                 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
 744                     UID_MAX);
 745         if (r->gid.op)
 746                 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
 747                     GID_MAX);
 748         if (r->flags || r->flagset) {
 749                 printf(" flags ");
 750                 print_flags(r->flags);
 751                 printf("/");
 752                 print_flags(r->flagset);
 753         }
 754         if (r->type) {
 755                 const struct icmptypeent        *it;
 756
 757                 it = geticmptypebynumber(r->type-1, r->af);
 758                 if (r->af != AF_INET6)
 759                         printf(" icmp-type");
 760                 else
 761                         printf(" icmp6-type");
 762                 if (it != NULL)
 763                         printf(" %s", it->name);
 764                 else
 765                         printf(" %u", r->type-1);
 766                 if (r->code) {
 767                         const struct icmpcodeent        *ic;
 768
 769                         ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
 770                         if (ic != NULL)
 771                                 printf(" code %s", ic->name);
 772                         else
 773                                 printf(" code %u", r->code-1);
 774                 }
 775         }
 776         if (r->tos)
 777                 printf(" tos 0x%2.2x", r->tos);
 778         if (r->keep_state == PF_STATE_NORMAL)
 779                 printf(" keep state");
 780         else if (r->keep_state == PF_STATE_MODULATE)
 781                 printf(" modulate state");
 782         else if (r->keep_state == PF_STATE_SYNPROXY)
 783                 printf(" synproxy state");
 784         opts = 0;
 785         if (r->max_states || r->max_src_nodes || r->max_src_states)
 786                 opts = 1;
 787         if (r->rule_flag & PFRULE_NOSYNC)
 788                 opts = 1;
 789         if (r->rule_flag & PFRULE_SRCTRACK)
 790                 opts = 1;
 791         if (r->rule_flag & (PFRULE_IFBOUND | PFRULE_GRBOUND))
 792                 opts = 1;
 793         for (i = 0; !opts && i < PFTM_MAX; ++i)
 794                 if (r->timeout[i])
 795                         opts = 1;
 796         if (opts) {
 797                 printf(" (");
 798                 if (r->max_states) {
 799                         printf("max %u", r->max_states);
 800                         opts = 0;
 801                 }
 802                 if (r->rule_flag & PFRULE_NOSYNC) {
 803                         if (!opts)
 804                                 printf(", ");
 805                         printf("no-sync");
 806                         opts = 0;
 807                 }
 808                 if (r->rule_flag & PFRULE_SRCTRACK) {
 809                         if (!opts)
 810                                 printf(", ");
 811                         printf("source-track");
 812                         if (r->rule_flag & PFRULE_RULESRCTRACK)
 813                                 printf(" rule");
 814                         else
 815                                 printf(" global");
 816                         opts = 0;
 817                 }
 818                 if (r->max_src_states) {
 819                         if (!opts)
 820                                 printf(", ");
 821                         printf("max-src-states %u", r->max_src_states);
 822                         opts = 0;
 823                 }
 824                 if (r->max_src_nodes) {
 825                         if (!opts)
 826                                 printf(", ");
 827                         printf("max-src-nodes %u", r->max_src_nodes);
 828                         opts = 0;
 829                 }
 830                 if (r->rule_flag & PFRULE_IFBOUND) {
 831                         if (!opts)
 832                                 printf(", ");
 833                         printf("if-bound");
 834                         opts = 0;
 835                 }
 836                 if (r->rule_flag & PFRULE_GRBOUND) {
 837                         if (!opts)
 838                                 printf(", ");
 839                         printf("group-bound");
 840                         opts = 0;
 841                 }
 842                 for (i = 0; i < PFTM_MAX; ++i)
 843                         if (r->timeout[i]) {
 844                                 if (!opts)
 845                                         printf(", ");
 846                                 opts = 0;
 847                                 printf("%s %u", pf_timeouts[i].name,
 848                                     r->timeout[i]);
 849                         }
 850                 printf(")");
 851         }
 852         if (r->rule_flag & PFRULE_FRAGMENT)
 853                 printf(" fragment");
 854         if (r->rule_flag & PFRULE_NODF)
 855                 printf(" no-df");
 856         if (r->rule_flag & PFRULE_RANDOMID)
 857                 printf(" random-id");
 858         if (r->min_ttl)
 859                 printf(" min-ttl %d", r->min_ttl);
 860         if (r->max_mss)
 861                 printf(" max-mss %d", r->max_mss);
 862         if (r->allow_opts)
 863                 printf(" allow-opts");
 864         if (r->action == PF_SCRUB) {
 865                 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
 866                         printf(" reassemble tcp");
 867
 868                 if (r->rule_flag & PFRULE_FRAGDROP)
 869                         printf(" fragment drop-ovl");
 870                 else if (r->rule_flag & PFRULE_FRAGCROP)
 871                         printf(" fragment crop");
 872                 else
 873                         printf(" fragment reassemble");
 874         }
 875         if (r->label[0])
 876                 printf(" label \"%s\"", r->label);
 877         if (r->qname[0] && r->pqname[0])
 878                 printf(" queue(%s, %s)", r->qname, r->pqname);
 879         else if (r->qname[0])
 880                 printf(" queue %s", r->qname);
 881         if (r->tagname[0])
 882                 printf(" tag %s", r->tagname);
 883         if (r->match_tagname[0]) {
 884                 if (r->match_tag_not)
 885                         printf(" !");
 886                 printf(" tagged %s", r->match_tagname);
 887         }
 888         if (!r->anchorname[0] && (r->action == PF_NAT ||
 889             r->action == PF_BINAT || r->action == PF_RDR)) {
 890                 printf(" -> ");
 891                 print_pool(&r->rpool, r->rpool.proxy_port[0],
 892                     r->rpool.proxy_port[1], r->af, r->action);
 893         }
 894         printf("\n");
 895 }
 896
 897 void
 898 print_tabledef(const char *name, int flags, int addrs,
 899     struct node_tinithead *nodes)
 900 {
 901         struct node_tinit       *ti, *nti;
 902         struct node_host        *h;
 903
 904         printf("table <%s>", name);
 905         if (flags & PFR_TFLAG_CONST)
 906                 printf(" const");
 907         if (flags & PFR_TFLAG_PERSIST)
 908                 printf(" persist");
 909         SIMPLEQ_FOREACH(ti, nodes, entries) {
 910                 if (ti->file) {
 911                         printf(" file \"%s\"", ti->file);
 912                         continue;
 913                 }
 914                 printf(" {");
 915                 for (;;) {
 916                         for (h = ti->host; h != NULL; h = h->next) {
 917                                 printf(h->not ? " !" : " ");
 918                                 print_addr(&h->addr, h->af, 0);
 919                         }
 920                         nti = SIMPLEQ_NEXT(ti, entries);
 921                         if (nti != NULL && nti->file == NULL)
 922                                 ti = nti;       /* merge lists */
 923                         else
 924                                 break;
 925                 }
 926                 printf(" }");
 927         }
 928         if (addrs && SIMPLEQ_EMPTY(nodes))
 929                 printf(" { }");
 930         printf("\n");
 931 }
 932
 933 int
 934 parse_flags(char *s)
 935 {
 936         char            *p, *q;
 937         u_int8_t         f = 0;
 938
 939         for (p = s; *p; p++) {
 940                 if ((q = strchr(tcpflags, *p)) == NULL)
 941                         return -1;
 942                 else
 943                         f |= 1 << (q - tcpflags);
 944         }
 945         return (f ? f : PF_TH_ALL);
 946 }
 947
 948 void
 949 set_ipmask(struct node_host *h, u_int8_t b)
 950 {
 951         struct pf_addr  *m, *n;
 952         int              i, j = 0;
 953
 954         m = &h->addr.v.a.mask;
 955
 956         for (i = 0; i < 4; i++)
 957                 m->addr32[i] = 0;
 958
 959         while (b >= 32) {
 960                 m->addr32[j++] = 0xffffffff;
 961                 b -= 32;
 962         }
 963         for (i = 31; i > 31-b; --i)
 964                 m->addr32[j] |= (1 << i);
 965         if (b)
 966                 m->addr32[j] = htonl(m->addr32[j]);
 967
 968         /* Mask off bits of the address that will never be used. */
 969         n = &h->addr.v.a.addr;
 970         if (h->addr.type == PF_ADDR_ADDRMASK)
 971                 for (i = 0; i < 4; i++)
 972                         n->addr32[i] = n->addr32[i] & m->addr32[i];
 973 }
 974
 975 int
 976 check_netmask(struct node_host *h, sa_family_t af)
 977 {
 978         struct node_host        *n = NULL;
 979         struct pf_addr  *m;
 980
 981         for (n = h; n != NULL; n = n->next) {
 982                 if (h->addr.type == PF_ADDR_TABLE)
 983                         continue;
 984                 m = &h->addr.v.a.mask;
 985                 /* fix up netmask for dynaddr */
 986                 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
 987                     unmask(m, AF_INET6) > 32)
 988                         set_ipmask(n, 32);
 989                 /* netmasks > 32 bit are invalid on v4 */
 990                 if (af == AF_INET &&
 991                     (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
 992                         fprintf(stderr, "netmask %u invalid for IPv4 address\n",
 993                             unmask(m, AF_INET6));
 994                         return (1);
 995                 }
 996         }
 997         return (0);
 998 }
 999
1000 /* interface lookup routines */
1001
1002 struct node_host        *iftab;
1003
1004 void
1005 ifa_load(void)
1006 {
1007         struct ifaddrs          *ifap, *ifa;
1008         struct node_host        *n = NULL, *h = NULL;
1009         struct pfr_buffer        b;
1010         const struct pfi_if     *p;
1011
1012         if (getifaddrs(&ifap) < 0)
1013                 err(1, "getifaddrs");
1014
1015         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1016                 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1017                     ifa->ifa_addr->sa_family == AF_INET6 ||
1018                     ifa->ifa_addr->sa_family == AF_LINK))
1019                                 continue;
1020                 n = calloc(1, sizeof(struct node_host));
1021                 if (n == NULL)
1022                         err(1, "address: calloc");
1023                 n->af = ifa->ifa_addr->sa_family;
1024                 n->ifa_flags = ifa->ifa_flags;
1025 #ifdef __KAME__
1026                 if (n->af == AF_INET6 &&
1027                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1028                     ifa->ifa_addr)->sin6_addr) &&
1029                     ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1030                     0) {
1031                         struct sockaddr_in6     *sin6;
1032
1033                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1034                         sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1035                             sin6->sin6_addr.s6_addr[3];
1036                         sin6->sin6_addr.s6_addr[2] = 0;
1037                         sin6->sin6_addr.s6_addr[3] = 0;
1038                 }
1039 #endif
1040                 n->ifindex = 0;
1041                 if (n->af == AF_INET) {
1042                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1043                             ifa->ifa_addr)->sin_addr.s_addr,
1044                             sizeof(struct in_addr));
1045                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1046                             ifa->ifa_netmask)->sin_addr.s_addr,
1047                             sizeof(struct in_addr));
1048                         if (ifa->ifa_broadaddr != NULL)
1049                                 memcpy(&n->bcast, &((struct sockaddr_in *)
1050                                     ifa->ifa_broadaddr)->sin_addr.s_addr,
1051                                     sizeof(struct in_addr));
1052                         if (ifa->ifa_dstaddr != NULL)
1053                                 memcpy(&n->peer, &((struct sockaddr_in *)
1054                                     ifa->ifa_dstaddr)->sin_addr.s_addr,
1055                                     sizeof(struct in_addr));
1056                 } else if (n->af == AF_INET6) {
1057                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1058                             ifa->ifa_addr)->sin6_addr.s6_addr,
1059                             sizeof(struct in6_addr));
1060                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1061                             ifa->ifa_netmask)->sin6_addr.s6_addr,
1062                             sizeof(struct in6_addr));
1063                         if (ifa->ifa_broadaddr != NULL)
1064                                 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1065                                     ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1066                                     sizeof(struct in6_addr));
1067                         if (ifa->ifa_dstaddr != NULL)
1068                                  memcpy(&n->peer, &((struct sockaddr_in6 *)
1069                                     ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1070                                     sizeof(struct in6_addr));
1071                         n->ifindex = ((struct sockaddr_in6 *)
1072                             ifa->ifa_addr)->sin6_scope_id;
1073                 }
1074                 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1075                         err(1, "ifa_load: strdup");
1076                 n->next = NULL;
1077                 n->tail = n;
1078                 if (h == NULL)
1079                         h = n;
1080                 else {
1081                         h->tail->next = n;
1082                         h->tail = n;
1083                 }
1084         }
1085
1086         /* add interface groups, including clonable and dynamic stuff */
1087         bzero(&b, sizeof(b));
1088         b.pfrb_type = PFRB_IFACES;
1089         for (;;) {
1090                 if (pfr_buf_grow(&b, b.pfrb_size))
1091                         err(1, "ifa_load: pfr_buf_grow");
1092                 b.pfrb_size = b.pfrb_msize;
1093                 if (pfi_get_ifaces(NULL, b.pfrb_caddr, &b.pfrb_size,
1094                     PFI_FLAG_GROUP))
1095                         err(1, "ifa_load: pfi_get_ifaces");
1096                 if (b.pfrb_size <= b.pfrb_msize)
1097                         break;
1098         }
1099         PFRB_FOREACH(p, &b) {
1100                 n = calloc(1, sizeof(struct node_host));
1101                 if (n == NULL)
1102                         err(1, "address: calloc");
1103                 n->af = AF_LINK;
1104                 n->ifa_flags = PF_IFA_FLAG_GROUP;
1105                 if (p->pfif_flags & PFI_IFLAG_DYNAMIC)
1106                         n->ifa_flags |= PF_IFA_FLAG_DYNAMIC;
1107                 if (p->pfif_flags & PFI_IFLAG_CLONABLE)
1108                         n->ifa_flags |= PF_IFA_FLAG_CLONABLE;
1109                 if (!strcmp(p->pfif_name, "lo"))
1110                         n->ifa_flags |= IFF_LOOPBACK;
1111                 if ((n->ifname = strdup(p->pfif_name)) == NULL)
1112                         err(1, "ifa_load: strdup");
1113                 n->next = NULL;
1114                 n->tail = n;
1115                 if (h == NULL)
1116                         h = n;
1117                 else {
1118                         h->tail->next = n;
1119                         h->tail = n;
1120                 }
1121         }
1122
1123         iftab = h;
1124         freeifaddrs(ifap);
1125 }
1126
1127 struct node_host *
1128 ifa_exists(const char *ifa_name, int group_ok)
1129 {
1130         struct node_host        *n;
1131         char                    *p, buf[IFNAMSIZ];
1132         int                      group;
1133
1134         group = !isdigit(ifa_name[strlen(ifa_name) - 1]);
1135         if (group && !group_ok)
1136                 return (NULL);
1137         if (iftab == NULL)
1138                 ifa_load();
1139
1140         for (n = iftab; n; n = n->next) {
1141                 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1142                         return (n);
1143         }
1144         if (!group) {
1145                 /* look for clonable and/or dynamic interface */
1146                 strlcpy(buf, ifa_name, sizeof(buf));
1147                 for (p = buf + strlen(buf) - 1; p > buf && isdigit(*p); p--)
1148                         *p = '\0';
1149                 for (n = iftab; n != NULL; n = n->next)
1150                         if (n->af == AF_LINK &&
1151                             !strncmp(n->ifname, buf, IFNAMSIZ))
1152                                 break;
1153                 if (n != NULL && n->ifa_flags &
1154                     (PF_IFA_FLAG_DYNAMIC | PF_IFA_FLAG_CLONABLE))
1155                         return (n);     /* XXX */
1156         }
1157         return (NULL);
1158 }
1159
1160 struct node_host *
1161 ifa_lookup(const char *ifa_name, int flags)
1162 {
1163         struct node_host        *p = NULL, *h = NULL, *n = NULL;
1164         int                      got4 = 0, got6 = 0;
1165         const char               *last_if = NULL;
1166
1167         if (!strncmp(ifa_name, "self", IFNAMSIZ))
1168                 ifa_name = NULL;
1169
1170         if (iftab == NULL)
1171                 ifa_load();
1172
1173         for (p = iftab; p; p = p->next) {
1174                 if (ifa_skip_if(ifa_name, p))
1175                         continue;
1176                 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1177                         continue;
1178                 if ((flags & PFI_AFLAG_BROADCAST) &&
1179                     !(p->ifa_flags & IFF_BROADCAST))
1180                         continue;
1181                 if ((flags & PFI_AFLAG_PEER) &&
1182                     !(p->ifa_flags & IFF_POINTOPOINT))
1183                         continue;
1184                 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1185                         continue;
1186                 if (last_if == NULL || strcmp(last_if, p->ifname))
1187                         got4 = got6 = 0;
1188                 last_if = p->ifname;
1189                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1190                         continue;
1191                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1192                         continue;
1193                 if (p->af == AF_INET)
1194                         got4 = 1;
1195                 else
1196                         got6 = 1;
1197                 n = calloc(1, sizeof(struct node_host));
1198                 if (n == NULL)
1199                         err(1, "address: calloc");
1200                 n->af = p->af;
1201                 if (flags & PFI_AFLAG_BROADCAST)
1202                         memcpy(&n->addr.v.a.addr, &p->bcast,
1203                             sizeof(struct pf_addr));
1204                 else if (flags & PFI_AFLAG_PEER)
1205                         memcpy(&n->addr.v.a.addr, &p->peer,
1206                             sizeof(struct pf_addr));
1207                 else
1208                         memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1209                             sizeof(struct pf_addr));
1210                 if (flags & PFI_AFLAG_NETWORK)
1211                         set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1212                 else {
1213                         if (n->af == AF_INET) {
1214                                 if (p->ifa_flags & IFF_LOOPBACK &&
1215                                     p->ifa_flags & IFF_LINK1)
1216                                         memcpy(&n->addr.v.a.mask,
1217                                             &p->addr.v.a.mask,
1218                                             sizeof(struct pf_addr));
1219                                 else
1220                                         set_ipmask(n, 32);
1221                         } else
1222                                 set_ipmask(n, 128);
1223                 }
1224                 n->ifindex = p->ifindex;
1225
1226                 n->next = NULL;
1227                 n->tail = n;
1228                 if (h == NULL)
1229                         h = n;
1230                 else {
1231                         h->tail->next = n;
1232                         h->tail = n;
1233                 }
1234         }
1235         return (h);
1236 }
1237
1238 int
1239 ifa_skip_if(const char *filter, struct node_host *p)
1240 {
1241         int     n;
1242
1243         if (p->af != AF_INET && p->af != AF_INET6)
1244                 return (1);
1245         if (filter == NULL || !*filter)
1246                 return (0);
1247         if (!strcmp(p->ifname, filter))
1248                 return (0);     /* exact match */
1249         n = strlen(filter);
1250         if (n < 1 || n >= IFNAMSIZ)
1251                 return (1);     /* sanity check */
1252         if (filter[n-1] >= '0' && filter[n-1] <= '9')
1253                 return (1);     /* only do exact match in that case */
1254         if (strncmp(p->ifname, filter, n))
1255                 return (1);     /* prefix doesn't match */
1256         return (p->ifname[n] < '0' || p->ifname[n] > '9');
1257 }
1258
1259
1260 struct node_host *
1261 host(const char *s)
1262 {
1263         struct node_host        *h = NULL;
1264         int                      mask, v4mask, v6mask, cont = 1;
1265         char                    *p, *q, *ps;
1266
1267         if ((p = strrchr(s, '/')) != NULL) {
1268                 mask = strtol(p+1, &q, 0);
1269                 if (!q || *q || mask > 128 || q == (p+1)) {
1270                         fprintf(stderr, "invalid netmask\n");
1271                         return (NULL);
1272                 }
1273                 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1274                         err(1, "host: malloc");
1275                 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1276                 v4mask = v6mask = mask;
1277         } else {
1278                 if ((ps = strdup(s)) == NULL)
1279                         err(1, "host: strdup");
1280                 v4mask = 32;
1281                 v6mask = 128;
1282                 mask = -1;
1283         }
1284
1285         /* interface with this name exists? */
1286         if (cont && (h = host_if(ps, mask)) != NULL)
1287                 cont = 0;
1288
1289         /* IPv4 address? */
1290         if (cont && (h = host_v4(s)) != NULL)
1291                 cont = 0;
1292
1293         /* IPv6 address? */
1294         if (cont && (h = host_v6(ps, v6mask)) != NULL)
1295                 cont = 0;
1296
1297         /* dns lookup */
1298         if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1299                 cont = 0;
1300         free(ps);
1301
1302         if (h == NULL || cont == 1) {
1303                 fprintf(stderr, "no IP address found for %s\n", s);
1304                 return (NULL);
1305         }
1306         return (h);
1307 }
1308
1309 struct node_host *
1310 host_if(const char *s, int mask)
1311 {
1312         struct node_host        *n, *h = NULL;
1313         char                    *p, *ps;
1314         int                      flags = 0;
1315
1316         if ((ps = strdup(s)) == NULL)
1317                 err(1, "host_if: strdup");
1318         while ((p = strrchr(ps, ':')) != NULL) {
1319                 if (!strcmp(p+1, "network"))
1320                         flags |= PFI_AFLAG_NETWORK;
1321                 else if (!strcmp(p+1, "broadcast"))
1322                         flags |= PFI_AFLAG_BROADCAST;
1323                 else if (!strcmp(p+1, "peer"))
1324                         flags |= PFI_AFLAG_PEER;
1325                 else if (!strcmp(p+1, "0"))
1326                         flags |= PFI_AFLAG_NOALIAS;
1327                 else {
1328                         free(ps);
1329                         return (NULL);
1330                 }
1331                 *p = '\0';
1332         }
1333         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1334                 fprintf(stderr, "illegal combination of interface modifiers\n");
1335                 free(ps);
1336                 return (NULL);
1337         }
1338         if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1339                 fprintf(stderr, "network or broadcast lookup, but "
1340                     "extra netmask given\n");
1341                 free(ps);
1342                 return (NULL);
1343         }
1344         if (ifa_exists(ps, 1) || !strncmp(ps, "self", IFNAMSIZ)) {
1345                 /* interface with this name exists */
1346                 h = ifa_lookup(ps, flags);
1347                 for (n = h; n != NULL && mask > -1; n = n->next)
1348                         set_ipmask(n, mask);
1349         }
1350
1351         free(ps);
1352         return (h);
1353 }
1354
1355 static struct node_host *
1356 host_v4(const char *s)
1357 {
1358         struct node_host        *h = NULL;
1359         struct in_addr           ina;
1360         int                      bits = 32;
1361
1362         memset(&ina, 0, sizeof(struct in_addr));
1363         if (strrchr(s, '/') != NULL) {
1364                 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1365                         return (NULL);
1366         } else {
1367                 if (inet_pton(AF_INET, s, &ina) != 1)
1368                         return (NULL);
1369         }
1370
1371         h = calloc(1, sizeof(struct node_host));
1372         if (h == NULL)
1373                 err(1, "address: calloc");
1374         h->ifname = NULL;
1375         h->af = AF_INET;
1376         h->addr.v.a.addr.addr32[0] = ina.s_addr;
1377         set_ipmask(h, bits);
1378         h->next = NULL;
1379         h->tail = h;
1380
1381         return (h);
1382 }
1383
1384 struct node_host *
1385 host_v6(const char *s, int mask)
1386 {
1387         struct addrinfo          hints, *res;
1388         struct node_host        *h = NULL;
1389
1390         memset(&hints, 0, sizeof(hints));
1391         hints.ai_family = AF_INET6;
1392         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1393         hints.ai_flags = AI_NUMERICHOST;
1394         if (getaddrinfo(s, "0", &hints, &res) == 0) {
1395                 h = calloc(1, sizeof(struct node_host));
1396                 if (h == NULL)
1397                         err(1, "address: calloc");
1398                 h->ifname = NULL;
1399                 h->af = AF_INET6;
1400                 memcpy(&h->addr.v.a.addr,
1401                     &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1402                     sizeof(h->addr.v.a.addr));
1403                 h->ifindex =
1404                     ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1405                 set_ipmask(h, mask);
1406                 freeaddrinfo(res);
1407                 h->next = NULL;
1408                 h->tail = h;
1409         }
1410
1411         return (h);
1412 }
1413
1414 struct node_host *
1415 host_dns(const char *s, int v4mask, int v6mask)
1416 {
1417         struct addrinfo          hints, *res0, *res;
1418         struct node_host        *n, *h = NULL;
1419         int                      error, noalias = 0;
1420         int                      got4 = 0, got6 = 0;
1421         char                    *p, *ps;
1422
1423         if ((ps = strdup(s)) == NULL)
1424                 err(1, "host_if: strdup");
1425         if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1426                 noalias = 1;
1427                 *p = '\0';
1428         }
1429         memset(&hints, 0, sizeof(hints));
1430         hints.ai_family = PF_UNSPEC;
1431         hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1432         error = getaddrinfo(ps, NULL, &hints, &res0);
1433         if (error)
1434                 return (h);
1435
1436         for (res = res0; res; res = res->ai_next) {
1437                 if (res->ai_family != AF_INET &&
1438                     res->ai_family != AF_INET6)
1439                         continue;
1440                 if (noalias) {
1441                         if (res->ai_family == AF_INET) {
1442                                 if (got4)
1443                                         continue;
1444                                 got4 = 1;
1445                         } else {
1446                                 if (got6)
1447                                         continue;
1448                                 got6 = 1;
1449                         }
1450                 }
1451                 n = calloc(1, sizeof(struct node_host));
1452                 if (n == NULL)
1453                         err(1, "host_dns: calloc");
1454                 n->ifname = NULL;
1455                 n->af = res->ai_family;
1456                 if (res->ai_family == AF_INET) {
1457                         memcpy(&n->addr.v.a.addr,
1458                             &((struct sockaddr_in *)
1459                             res->ai_addr)->sin_addr.s_addr,
1460                             sizeof(struct in_addr));
1461                         set_ipmask(n, v4mask);
1462                 } else {
1463                         memcpy(&n->addr.v.a.addr,
1464                             &((struct sockaddr_in6 *)
1465                             res->ai_addr)->sin6_addr.s6_addr,
1466                             sizeof(struct in6_addr));
1467                         n->ifindex =
1468                             ((struct sockaddr_in6 *)
1469                             res->ai_addr)->sin6_scope_id;
1470                         set_ipmask(n, v6mask);
1471                 }
1472                 n->next = NULL;
1473                 n->tail = n;
1474                 if (h == NULL)
1475                         h = n;
1476                 else {
1477                         h->tail->next = n;
1478                         h->tail = n;
1479                 }
1480         }
1481         freeaddrinfo(res0);
1482         free(ps);
1483
1484         return (h);
1485 }
1486
1487 /*
1488  * convert a hostname to a list of addresses and put them in the given buffer.
1489  * test:
1490  *      if set to 1, only simple addresses are accepted (no netblock, no "!").
1491  */
1492 int
1493 append_addr(struct pfr_buffer *b, char *s, int test)
1494 {
1495         char                     *r;
1496         struct node_host        *h, *n;
1497         int                      rv, not = 0;
1498
1499         for (r = s; *r == '!'; r++)
1500                 not = !not;
1501         if ((n = host(r)) == NULL) {
1502                 errno = 0;
1503                 return (-1);
1504         }
1505         rv = append_addr_host(b, n, test, not);
1506         do {
1507                 h = n;
1508                 n = n->next;
1509                 free(h);
1510         } while (n != NULL);
1511         return (rv);
1512 }
1513
1514 /*
1515  * same as previous function, but with a pre-parsed input and the ability
1516  * to "negate" the result. Does not free the node_host list.
1517  * not:
1518  *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1519  */
1520 int
1521 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1522 {
1523         int                      bits;
1524         struct pfr_addr          addr;
1525
1526         do {
1527                 bzero(&addr, sizeof(addr));
1528                 addr.pfra_not = n->not ^ not;
1529                 addr.pfra_af = n->af;
1530                 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1531                 switch (n->af) {
1532                 case AF_INET:
1533                         addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1534                         bits = 32;
1535                         break;
1536                 case AF_INET6:
1537                         memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1538                             sizeof(struct in6_addr));
1539                         bits = 128;
1540                         break;
1541                 default:
1542                         errno = EINVAL;
1543                         return (-1);
1544                 }
1545                 if ((test && (not || addr.pfra_net != bits)) ||
1546                     addr.pfra_net > bits) {
1547                         errno = EINVAL;
1548                         return (-1);
1549                 }
1550                 if (pfr_buf_add(b, &addr))
1551                         return (-1);
1552         } while ((n = n->next) != NULL);
1553
1554         return (0);
1555 }
1556
1557 int
1558 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor,
1559     const char *ruleset)
1560 {
1561         struct pfioc_trans_e trans;
1562
1563         bzero(&trans, sizeof(trans));
1564         trans.rs_num = rs_num;
1565         if (strlcpy(trans.anchor, anchor,
1566             sizeof(trans.anchor)) >= sizeof(trans.anchor) ||
1567             strlcpy(trans.ruleset, ruleset,
1568             sizeof(trans.ruleset)) >= sizeof(trans.ruleset))
1569                 errx(1, "pfctl_add_trans: strlcpy");
1570
1571         return pfr_buf_add(buf, &trans);
1572 }
1573
1574 u_int32_t
1575 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor,
1576     const char *ruleset)
1577 {
1578         const struct pfioc_trans_e *p;
1579
1580         PFRB_FOREACH(p, buf)
1581                 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor) &&
1582                     !strcmp(ruleset, p->ruleset))
1583                         return (p->ticket);
1584         errx(1, "pfr_get_ticket: assertion failed");
1585 }
1586
1587 int
1588 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1589 {
1590         struct pfioc_trans trans;
1591
1592         bzero(&trans, sizeof(trans));
1593         trans.size = buf->pfrb_size - from;
1594         trans.esize = sizeof(struct pfioc_trans_e);
1595         trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1596         return ioctl(dev, cmd, &trans);
1597 }