contrib/pf/pfctl/pfctl_parser.c

   1 /*      $OpenBSD: pfctl_parser.c,v 1.211 2004/12/07 10:33:41 dhartmei Exp $ */
   2
   3 /*
   4  * Copyright (c) 2001 Daniel Hartmeier
   5  * Copyright (c) 2002,2003 Henning Brauer
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  *    - Redistributions of source code must retain the above copyright
  13  *      notice, this list of conditions and the following disclaimer.
  14  *    - Redistributions in binary form must reproduce the above
  15  *      copyright notice, this list of conditions and the following
  16  *      disclaimer in the documentation and/or other materials provided
  17  *      with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  22  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  23  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  25  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  27  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  29  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <sys/types.h>
  38 #include <sys/ioctl.h>
  39 #include <sys/socket.h>
  40 #include <sys/param.h>
  41 #include <sys/proc.h>
  42 #include <net/if.h>
  43 #include <netinet/in.h>
  44 #include <netinet/in_systm.h>
  45 #include <netinet/ip.h>
  46 #include <netinet/ip_icmp.h>
  47 #include <netinet/icmp6.h>
  48 #include <net/pfvar.h>
  49 #include <arpa/inet.h>
  50
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <ctype.h>
  55 #include <limits.h>
  56 #include <netdb.h>
  57 #include <stdarg.h>
  58 #include <errno.h>
  59 #include <err.h>
  60 #include <ifaddrs.h>
  61
  62 #include "pfctl_parser.h"
  63 #include "pfctl.h"
  64
  65 void             print_op (u_int8_t, const char *, const char *);
  66 void             print_port (u_int8_t, u_int16_t, u_int16_t, const char *);
  67 void             print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
  68 void             print_flags (u_int8_t);
  69 void             print_fromto(struct pf_rule_addr *, pf_osfp_t,
  70                     struct pf_rule_addr *, u_int8_t, u_int8_t, int);
  71 int              ifa_skip_if(const char *filter, struct node_host *p);
  72
  73 struct node_host        *host_if(const char *, int);
  74 struct node_host        *host_v4(const char *, int);
  75 struct node_host        *host_v6(const char *, int);
  76 struct node_host        *host_dns(const char *, int, int);
  77
  78 const char *tcpflags = "FSRPAUEW";
  79
  80 static const struct icmptypeent icmp_type[] = {
  81         { "echoreq",    ICMP_ECHO },
  82         { "echorep",    ICMP_ECHOREPLY },
  83         { "unreach",    ICMP_UNREACH },
  84         { "squench",    ICMP_SOURCEQUENCH },
  85         { "redir",      ICMP_REDIRECT },
  86         { "althost",    ICMP_ALTHOSTADDR },
  87         { "routeradv",  ICMP_ROUTERADVERT },
  88         { "routersol",  ICMP_ROUTERSOLICIT },
  89         { "timex",      ICMP_TIMXCEED },
  90         { "paramprob",  ICMP_PARAMPROB },
  91         { "timereq",    ICMP_TSTAMP },
  92         { "timerep",    ICMP_TSTAMPREPLY },
  93         { "inforeq",    ICMP_IREQ },
  94         { "inforep",    ICMP_IREQREPLY },
  95         { "maskreq",    ICMP_MASKREQ },
  96         { "maskrep",    ICMP_MASKREPLY },
  97         { "trace",      ICMP_TRACEROUTE },
  98         { "dataconv",   ICMP_DATACONVERR },
  99         { "mobredir",   ICMP_MOBILE_REDIRECT },
 100         { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
 101         { "ipv6-here",  ICMP_IPV6_IAMHERE },
 102         { "mobregreq",  ICMP_MOBILE_REGREQUEST },
 103         { "mobregrep",  ICMP_MOBILE_REGREPLY },
 104         { "skip",       ICMP_SKIP },
 105         { "photuris",   ICMP_PHOTURIS }
 106 };
 107
 108 static const struct icmptypeent icmp6_type[] = {
 109         { "unreach",    ICMP6_DST_UNREACH },
 110         { "toobig",     ICMP6_PACKET_TOO_BIG },
 111         { "timex",      ICMP6_TIME_EXCEEDED },
 112         { "paramprob",  ICMP6_PARAM_PROB },
 113         { "echoreq",    ICMP6_ECHO_REQUEST },
 114         { "echorep",    ICMP6_ECHO_REPLY },
 115         { "groupqry",   ICMP6_MEMBERSHIP_QUERY },
 116         { "listqry",    MLD_LISTENER_QUERY },
 117         { "grouprep",   ICMP6_MEMBERSHIP_REPORT },
 118         { "listenrep",  MLD_LISTENER_REPORT },
 119         { "groupterm",  ICMP6_MEMBERSHIP_REDUCTION },
 120         { "listendone", MLD_LISTENER_DONE },
 121         { "routersol",  ND_ROUTER_SOLICIT },
 122         { "routeradv",  ND_ROUTER_ADVERT },
 123         { "neighbrsol", ND_NEIGHBOR_SOLICIT },
 124         { "neighbradv", ND_NEIGHBOR_ADVERT },
 125         { "redir",      ND_REDIRECT },
 126         { "routrrenum", ICMP6_ROUTER_RENUMBERING },
 127         { "wrureq",     ICMP6_WRUREQUEST },
 128         { "wrurep",     ICMP6_WRUREPLY },
 129         { "fqdnreq",    ICMP6_FQDN_QUERY },
 130         { "fqdnrep",    ICMP6_FQDN_REPLY },
 131         { "niqry",      ICMP6_NI_QUERY },
 132         { "nirep",      ICMP6_NI_REPLY },
 133         { "mtraceresp", MLD_MTRACE_RESP },
 134         { "mtrace",     MLD_MTRACE }
 135 };
 136
 137 static const struct icmpcodeent icmp_code[] = {
 138         { "net-unr",            ICMP_UNREACH,   ICMP_UNREACH_NET },
 139         { "host-unr",           ICMP_UNREACH,   ICMP_UNREACH_HOST },
 140         { "proto-unr",          ICMP_UNREACH,   ICMP_UNREACH_PROTOCOL },
 141         { "port-unr",           ICMP_UNREACH,   ICMP_UNREACH_PORT },
 142         { "needfrag",           ICMP_UNREACH,   ICMP_UNREACH_NEEDFRAG },
 143         { "srcfail",            ICMP_UNREACH,   ICMP_UNREACH_SRCFAIL },
 144         { "net-unk",            ICMP_UNREACH,   ICMP_UNREACH_NET_UNKNOWN },
 145         { "host-unk",           ICMP_UNREACH,   ICMP_UNREACH_HOST_UNKNOWN },
 146         { "isolate",            ICMP_UNREACH,   ICMP_UNREACH_ISOLATED },
 147         { "net-prohib",         ICMP_UNREACH,   ICMP_UNREACH_NET_PROHIB },
 148         { "host-prohib",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PROHIB },
 149         { "net-tos",            ICMP_UNREACH,   ICMP_UNREACH_TOSNET },
 150         { "host-tos",           ICMP_UNREACH,   ICMP_UNREACH_TOSHOST },
 151         { "filter-prohib",      ICMP_UNREACH,   ICMP_UNREACH_FILTER_PROHIB },
 152         { "host-preced",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PRECEDENCE },
 153         { "cutoff-preced",      ICMP_UNREACH,   ICMP_UNREACH_PRECEDENCE_CUTOFF },
 154         { "redir-net",          ICMP_REDIRECT,  ICMP_REDIRECT_NET },
 155         { "redir-host",         ICMP_REDIRECT,  ICMP_REDIRECT_HOST },
 156         { "redir-tos-net",      ICMP_REDIRECT,  ICMP_REDIRECT_TOSNET },
 157         { "redir-tos-host",     ICMP_REDIRECT,  ICMP_REDIRECT_TOSHOST },
 158         { "normal-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
 159         { "common-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
 160         { "transit",            ICMP_TIMXCEED,  ICMP_TIMXCEED_INTRANS },
 161         { "reassemb",           ICMP_TIMXCEED,  ICMP_TIMXCEED_REASS },
 162         { "badhead",            ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
 163         { "optmiss",            ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
 164         { "badlen",             ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
 165         { "unknown-ind",        ICMP_PHOTURIS,  ICMP_PHOTURIS_UNKNOWN_INDEX },
 166         { "auth-fail",          ICMP_PHOTURIS,  ICMP_PHOTURIS_AUTH_FAILED },
 167         { "decrypt-fail",       ICMP_PHOTURIS,  ICMP_PHOTURIS_DECRYPT_FAILED }
 168 };
 169
 170 static const struct icmpcodeent icmp6_code[] = {
 171         { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
 172         { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
 173         { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
 174         { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
 175         { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
 176         { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
 177         { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
 178         { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
 179         { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
 180         { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
 181         { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
 182         { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
 183 };
 184
 185 const struct pf_timeout pf_timeouts[] = {
 186         { "tcp.first",          PFTM_TCP_FIRST_PACKET },
 187         { "tcp.opening",        PFTM_TCP_OPENING },
 188         { "tcp.established",    PFTM_TCP_ESTABLISHED },
 189         { "tcp.closing",        PFTM_TCP_CLOSING },
 190         { "tcp.finwait",        PFTM_TCP_FIN_WAIT },
 191         { "tcp.closed",         PFTM_TCP_CLOSED },
 192         { "tcp.tsdiff",         PFTM_TS_DIFF },
 193         { "udp.first",          PFTM_UDP_FIRST_PACKET },
 194         { "udp.single",         PFTM_UDP_SINGLE },
 195         { "udp.multiple",       PFTM_UDP_MULTIPLE },
 196         { "icmp.first",         PFTM_ICMP_FIRST_PACKET },
 197         { "icmp.error",         PFTM_ICMP_ERROR_REPLY },
 198         { "other.first",        PFTM_OTHER_FIRST_PACKET },
 199         { "other.single",       PFTM_OTHER_SINGLE },
 200         { "other.multiple",     PFTM_OTHER_MULTIPLE },
 201         { "frag",               PFTM_FRAG },
 202         { "interval",           PFTM_INTERVAL },
 203         { "adaptive.start",     PFTM_ADAPTIVE_START },
 204         { "adaptive.end",       PFTM_ADAPTIVE_END },
 205         { "src.track",          PFTM_SRC_NODE },
 206         { NULL,                 0 }
 207 };
 208
 209 const struct icmptypeent *
 210 geticmptypebynumber(u_int8_t type, sa_family_t af)
 211 {
 212         unsigned int    i;
 213
 214         if (af != AF_INET6) {
 215                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 216                     i++) {
 217                         if (type == icmp_type[i].type)
 218                                 return (&icmp_type[i]);
 219                 }
 220         } else {
 221                 for (i=0; i < (sizeof (icmp6_type) /
 222                     sizeof(icmp6_type[0])); i++) {
 223                         if (type == icmp6_type[i].type)
 224                                  return (&icmp6_type[i]);
 225                 }
 226         }
 227         return (NULL);
 228 }
 229
 230 const struct icmptypeent *
 231 geticmptypebyname(char *w, sa_family_t af)
 232 {
 233         unsigned int    i;
 234
 235         if (af != AF_INET6) {
 236                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 237                     i++) {
 238                         if (!strcmp(w, icmp_type[i].name))
 239                                 return (&icmp_type[i]);
 240                 }
 241         } else {
 242                 for (i=0; i < (sizeof (icmp6_type) /
 243                     sizeof(icmp6_type[0])); i++) {
 244                         if (!strcmp(w, icmp6_type[i].name))
 245                                 return (&icmp6_type[i]);
 246                 }
 247         }
 248         return (NULL);
 249 }
 250
 251 const struct icmpcodeent *
 252 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
 253 {
 254         unsigned int    i;
 255
 256         if (af != AF_INET6) {
 257                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 258                     i++) {
 259                         if (type == icmp_code[i].type &&
 260                             code == icmp_code[i].code)
 261                                 return (&icmp_code[i]);
 262                 }
 263         } else {
 264                 for (i=0; i < (sizeof (icmp6_code) /
 265                     sizeof(icmp6_code[0])); i++) {
 266                         if (type == icmp6_code[i].type &&
 267                             code == icmp6_code[i].code)
 268                                 return (&icmp6_code[i]);
 269                 }
 270         }
 271         return (NULL);
 272 }
 273
 274 const struct icmpcodeent *
 275 geticmpcodebyname(u_long type, char *w, sa_family_t af)
 276 {
 277         unsigned int    i;
 278
 279         if (af != AF_INET6) {
 280                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 281                     i++) {
 282                         if (type == icmp_code[i].type &&
 283                             !strcmp(w, icmp_code[i].name))
 284                                 return (&icmp_code[i]);
 285                 }
 286         } else {
 287                 for (i=0; i < (sizeof (icmp6_code) /
 288                     sizeof(icmp6_code[0])); i++) {
 289                         if (type == icmp6_code[i].type &&
 290                             !strcmp(w, icmp6_code[i].name))
 291                                 return (&icmp6_code[i]);
 292                 }
 293         }
 294         return (NULL);
 295 }
 296
 297 void
 298 print_op(u_int8_t op, const char *a1, const char *a2)
 299 {
 300         if (op == PF_OP_IRG)
 301                 printf(" %s >< %s", a1, a2);
 302         else if (op == PF_OP_XRG)
 303                 printf(" %s <> %s", a1, a2);
 304         else if (op == PF_OP_EQ)
 305                 printf(" = %s", a1);
 306         else if (op == PF_OP_NE)
 307                 printf(" != %s", a1);
 308         else if (op == PF_OP_LT)
 309                 printf(" < %s", a1);
 310         else if (op == PF_OP_LE)
 311                 printf(" <= %s", a1);
 312         else if (op == PF_OP_GT)
 313                 printf(" > %s", a1);
 314         else if (op == PF_OP_GE)
 315                 printf(" >= %s", a1);
 316         else if (op == PF_OP_RRG)
 317                 printf(" %s:%s", a1, a2);
 318 }
 319
 320 void
 321 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto)
 322 {
 323         char             a1[6], a2[6];
 324         struct servent  *s;
 325
 326         s = getservbyport(p1, proto);
 327         p1 = ntohs(p1);
 328         p2 = ntohs(p2);
 329         snprintf(a1, sizeof(a1), "%u", p1);
 330         snprintf(a2, sizeof(a2), "%u", p2);
 331         printf(" port");
 332         if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
 333                 print_op(op, s->s_name, a2);
 334         else
 335                 print_op(op, a1, a2);
 336 }
 337
 338 void
 339 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
 340 {
 341         char    a1[11], a2[11];
 342
 343         snprintf(a1, sizeof(a1), "%u", u1);
 344         snprintf(a2, sizeof(a2), "%u", u2);
 345         printf(" %s", t);
 346         if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
 347                 print_op(op, "unknown", a2);
 348         else
 349                 print_op(op, a1, a2);
 350 }
 351
 352 void
 353 print_flags(u_int8_t f)
 354 {
 355         int     i;
 356
 357         for (i = 0; tcpflags[i]; ++i)
 358                 if (f & (1 << i))
 359                         printf("%c", tcpflags[i]);
 360 }
 361
 362 void
 363 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
 364     sa_family_t af, u_int8_t proto, int verbose)
 365 {
 366         char buf[PF_OSFP_LEN*3];
 367         if (src->addr.type == PF_ADDR_ADDRMASK &&
 368             dst->addr.type == PF_ADDR_ADDRMASK &&
 369             PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
 370             PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
 371             PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
 372             PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
 373             !src->neg && !dst->neg &&
 374             !src->port_op && !dst->port_op &&
 375             osfp == PF_OSFP_ANY)
 376                 printf(" all");
 377         else {
 378                 printf(" from ");
 379                 if (src->neg)
 380                         printf("! ");
 381                 print_addr(&src->addr, af, verbose);
 382                 if (src->port_op)
 383                         print_port(src->port_op, src->port[0],
 384                             src->port[1],
 385                             proto == IPPROTO_TCP ? "tcp" : "udp");
 386                 if (osfp != PF_OSFP_ANY)
 387                         printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
 388                             sizeof(buf)));
 389
 390                 printf(" to ");
 391                 if (dst->neg)
 392                         printf("! ");
 393                 print_addr(&dst->addr, af, verbose);
 394                 if (dst->port_op)
 395                         print_port(dst->port_op, dst->port[0],
 396                             dst->port[1],
 397                             proto == IPPROTO_TCP ? "tcp" : "udp");
 398         }
 399 }
 400
 401 void
 402 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
 403     sa_family_t af, int id)
 404 {
 405         struct pf_pooladdr      *pooladdr;
 406
 407         if ((TAILQ_FIRST(&pool->list) != NULL) &&
 408             TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 409                 printf("{ ");
 410         TAILQ_FOREACH(pooladdr, &pool->list, entries){
 411                 switch (id) {
 412                 case PF_NAT:
 413                 case PF_RDR:
 414                 case PF_BINAT:
 415                         print_addr(&pooladdr->addr, af, 0);
 416                         break;
 417                 case PF_PASS:
 418                         if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
 419                                 printf("%s", pooladdr->ifname);
 420                         else {
 421                                 printf("(%s ", pooladdr->ifname);
 422                                 print_addr(&pooladdr->addr, af, 0);
 423                                 printf(")");
 424                         }
 425                         break;
 426                 default:
 427                         break;
 428                 }
 429                 if (TAILQ_NEXT(pooladdr, entries) != NULL)
 430                         printf(", ");
 431                 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 432                         printf(" }");
 433         }
 434         switch (id) {
 435         case PF_NAT:
 436                 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
 437                     p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
 438                         if (p1 == p2)
 439                                 printf(" port %u", p1);
 440                         else
 441                                 printf(" port %u:%u", p1, p2);
 442                 }
 443                 break;
 444         case PF_RDR:
 445                 if (p1) {
 446                         printf(" port %u", p1);
 447                         if (p2 && (p2 != p1))
 448                                 printf(":%u", p2);
 449                 }
 450                 break;
 451         default:
 452                 break;
 453         }
 454         switch (pool->opts & PF_POOL_TYPEMASK) {
 455         case PF_POOL_NONE:
 456                 break;
 457         case PF_POOL_BITMASK:
 458                 printf(" bitmask");
 459                 break;
 460         case PF_POOL_RANDOM:
 461                 printf(" random");
 462                 break;
 463         case PF_POOL_SRCHASH:
 464                 printf(" source-hash 0x%08x%08x%08x%08x",
 465                     pool->key.key32[0], pool->key.key32[1],
 466                     pool->key.key32[2], pool->key.key32[3]);
 467                 break;
 468         case PF_POOL_ROUNDROBIN:
 469                 printf(" round-robin");
 470                 break;
 471         }
 472         if (pool->opts & PF_POOL_STICKYADDR)
 473                 printf(" sticky-address");
 474         if (id == PF_NAT && p1 == 0 && p2 == 0)
 475                 printf(" static-port");
 476 }
 477
 478 const char      *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
 479 const char      *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
 480 const char      *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
 481 const char      *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
 482
 483 void
 484 print_status(struct pf_status *s, int opts)
 485 {
 486         char    statline[80], *running;
 487         time_t  runtime;
 488         int     i;
 489
 490         runtime = time(NULL) - s->since;
 491         running = s->running ? "Enabled" : "Disabled";
 492
 493         if (s->since) {
 494                 unsigned        sec, min, hrs, day = runtime;
 495
 496                 sec = day % 60;
 497                 day /= 60;
 498                 min = day % 60;
 499                 day /= 60;
 500                 hrs = day % 24;
 501                 day /= 24;
 502                 snprintf(statline, sizeof(statline),
 503                     "Status: %s for %u days %.2u:%.2u:%.2u",
 504                     running, day, hrs, min, sec);
 505         } else
 506                 snprintf(statline, sizeof(statline), "Status: %s", running);
 507         printf("%-44s", statline);
 508         switch (s->debug) {
 509         case PF_DEBUG_NONE:
 510                 printf("%15s\n\n", "Debug: None");
 511                 break;
 512         case PF_DEBUG_URGENT:
 513                 printf("%15s\n\n", "Debug: Urgent");
 514                 break;
 515         case PF_DEBUG_MISC:
 516                 printf("%15s\n\n", "Debug: Misc");
 517                 break;
 518         case PF_DEBUG_NOISY:
 519                 printf("%15s\n\n", "Debug: Loud");
 520                 break;
 521         }
 522         printf("Hostid: 0x%08x\n\n", ntohl(s->hostid));
 523         if (s->ifname[0] != 0) {
 524                 printf("Interface Stats for %-16s %5s %16s\n",
 525                     s->ifname, "IPv4", "IPv6");
 526                 printf("  %-25s %14llu %16llu\n", "Bytes In",
 527                     (unsigned long long)s->bcounters[0][0],
 528                     (unsigned long long)s->bcounters[1][0]);
 529                 printf("  %-25s %14llu %16llu\n", "Bytes Out",
 530                     (unsigned long long)s->bcounters[0][1],
 531                     (unsigned long long)s->bcounters[1][1]);
 532                 printf("  Packets In\n");
 533                 printf("    %-23s %14llu %16llu\n", "Passed",
 534                     (unsigned long long)s->pcounters[0][0][PF_PASS],
 535                     (unsigned long long)s->pcounters[1][0][PF_PASS]);
 536                 printf("    %-23s %14llu %16llu\n", "Blocked",
 537                     (unsigned long long)s->pcounters[0][0][PF_DROP],
 538                     (unsigned long long)s->pcounters[1][0][PF_DROP]);
 539                 printf("  Packets Out\n");
 540                 printf("    %-23s %14llu %16llu\n", "Passed",
 541                     (unsigned long long)s->pcounters[0][1][PF_PASS],
 542                     (unsigned long long)s->pcounters[1][1][PF_PASS]);
 543                 printf("    %-23s %14llu %16llu\n\n", "Blocked",
 544                     (unsigned long long)s->pcounters[0][1][PF_DROP],
 545                     (unsigned long long)s->pcounters[1][1][PF_DROP]);
 546         }
 547         printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
 548         printf("  %-25s %14u %14s\n", "current entries", s->states, "");
 549         for (i = 0; i < FCNT_MAX; i++) {
 550                 printf("  %-25s %14llu ", pf_fcounters[i],
 551                             (unsigned long long)s->fcounters[i]);
 552                 if (runtime > 0)
 553                         printf("%14.1f/s\n",
 554                             (double)s->fcounters[i] / (double)runtime);
 555                 else
 556                         printf("%14s\n", "");
 557         }
 558         if (opts & PF_OPT_VERBOSE) {
 559                 printf("Source Tracking Table\n");
 560                 printf("  %-25s %14u %14s\n", "current entries",
 561                     s->src_nodes, "");
 562                 for (i = 0; i < SCNT_MAX; i++) {
 563                         printf("  %-25s %14lld ", pf_scounters[i],
 564                                    (unsigned long long)s->scounters[i]);
 565                         if (runtime > 0)
 566                                 printf("%14.1f/s\n",
 567                                     (double)s->scounters[i] / (double)runtime);
 568                         else
 569                                 printf("%14s\n", "");
 570                 }
 571         }
 572         printf("Counters\n");
 573         for (i = 0; i < PFRES_MAX; i++) {
 574                 printf("  %-25s %14llu ", pf_reasons[i],
 575                     (unsigned long long)s->counters[i]);
 576                 if (runtime > 0)
 577                         printf("%14.1f/s\n",
 578                             (double)s->counters[i] / (double)runtime);
 579                 else
 580                         printf("%14s\n", "");
 581         }
 582         if (opts & PF_OPT_VERBOSE) {
 583                 printf("Limit Counters\n");
 584                 for (i = 0; i < LCNT_MAX; i++) {
 585                         printf("  %-25s %14lld ", pf_lcounters[i],
 586 #ifdef __FreeBSD__
 587                                     (unsigned long long)s->lcounters[i]);
 588 #else
 589                                     s->lcounters[i]);
 590 #endif
 591                         if (runtime > 0)
 592                                 printf("%14.1f/s\n",
 593                                     (double)s->lcounters[i] / (double)runtime);
 594                         else
 595                                 printf("%14s\n", "");
 596                 }
 597         }
 598 }
 599
 600 void
 601 print_src_node(struct pf_src_node *sn, int opts)
 602 {
 603         struct pf_addr_wrap aw;
 604         int min, sec;
 605
 606         memset(&aw, 0, sizeof(aw));
 607         if (sn->af == AF_INET)
 608                 aw.v.a.mask.addr32[0] = 0xffffffff;
 609         else
 610                 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
 611
 612         aw.v.a.addr = sn->addr;
 613         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 614         printf(" -> ");
 615         aw.v.a.addr = sn->raddr;
 616         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 617         printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
 618             sn->conn, sn->conn_rate.count / 1000,
 619             (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
 620         if (opts & PF_OPT_VERBOSE) {
 621                 sec = sn->creation % 60;
 622                 sn->creation /= 60;
 623                 min = sn->creation % 60;
 624                 sn->creation /= 60;
 625                 printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
 626                 if (sn->states == 0) {
 627                         sec = sn->expire % 60;
 628                         sn->expire /= 60;
 629                         min = sn->expire % 60;
 630                         sn->expire /= 60;
 631                         printf(", expires in %.2u:%.2u:%.2u",
 632                             sn->expire, min, sec);
 633                 }
 634                 printf(", %u pkts, %u bytes", sn->packets, sn->bytes);
 635                 switch (sn->ruletype) {
 636                 case PF_NAT:
 637                         if (sn->rule.nr != -1)
 638                                 printf(", nat rule %u", sn->rule.nr);
 639                         break;
 640                 case PF_RDR:
 641                         if (sn->rule.nr != -1)
 642                                 printf(", rdr rule %u", sn->rule.nr);
 643                         break;
 644                 case PF_PASS:
 645                         if (sn->rule.nr != -1)
 646                                 printf(", filter rule %u", sn->rule.nr);
 647                         break;
 648                 }
 649                 printf("\n");
 650         }
 651 }
 652
 653 void
 654 print_rule(struct pf_rule *r, const char *anchor_call, int verbose)
 655 {
 656         static const char *actiontypes[] = { "pass", "block", "scrub",
 657             "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
 658         static const char *anchortypes[] = { "anchor", "anchor", "anchor",
 659             "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
 660             "binat-anchor", "rdr-anchor", "rdr-anchor" };
 661         int     i, opts;
 662
 663         if (verbose)
 664                 printf("@%d ", r->nr);
 665         if (r->action > PF_NORDR)
 666                 printf("action(%d)", r->action);
 667         else if (anchor_call[0])
 668                 printf("%s \"%s\"", anchortypes[r->action],
 669                     anchor_call);
 670         else {
 671                 printf("%s", actiontypes[r->action]);
 672                 if (r->natpass)
 673                         printf(" pass");
 674         }
 675         if (r->action == PF_DROP) {
 676                 if (r->rule_flag & PFRULE_RETURN)
 677                         printf(" return");
 678                 else if (r->rule_flag & PFRULE_RETURNRST) {
 679                         if (!r->return_ttl)
 680                                 printf(" return-rst");
 681                         else
 682                                 printf(" return-rst(ttl %d)", r->return_ttl);
 683                 } else if (r->rule_flag & PFRULE_RETURNICMP) {
 684                         const struct icmpcodeent        *ic, *ic6;
 685
 686                         ic = geticmpcodebynumber(r->return_icmp >> 8,
 687                             r->return_icmp & 255, AF_INET);
 688                         ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
 689                             r->return_icmp6 & 255, AF_INET6);
 690
 691                         switch (r->af) {
 692                         case AF_INET:
 693                                 printf(" return-icmp");
 694                                 if (ic == NULL)
 695                                         printf("(%u)", r->return_icmp & 255);
 696                                 else
 697                                         printf("(%s)", ic->name);
 698                                 break;
 699                         case AF_INET6:
 700                                 printf(" return-icmp6");
 701                                 if (ic6 == NULL)
 702                                         printf("(%u)", r->return_icmp6 & 255);
 703                                 else
 704                                         printf("(%s)", ic6->name);
 705                                 break;
 706                         default:
 707                                 printf(" return-icmp");
 708                                 if (ic == NULL)
 709                                         printf("(%u, ", r->return_icmp & 255);
 710                                 else
 711                                         printf("(%s, ", ic->name);
 712                                 if (ic6 == NULL)
 713                                         printf("%u)", r->return_icmp6 & 255);
 714                                 else
 715                                         printf("%s)", ic6->name);
 716                                 break;
 717                         }
 718                 } else
 719                         printf(" drop");
 720         }
 721         if (r->direction == PF_IN)
 722                 printf(" in");
 723         else if (r->direction == PF_OUT)
 724                 printf(" out");
 725         if (r->log == 1)
 726                 printf(" log");
 727         else if (r->log == 2)
 728                 printf(" log-all");
 729         if (r->quick)
 730                 printf(" quick");
 731         if (r->ifname[0]) {
 732                 if (r->ifnot)
 733                         printf(" on ! %s", r->ifname);
 734                 else
 735                         printf(" on %s", r->ifname);
 736         }
 737         if (r->rt) {
 738                 if (r->rt == PF_ROUTETO)
 739                         printf(" route-to");
 740                 else if (r->rt == PF_REPLYTO)
 741                         printf(" reply-to");
 742                 else if (r->rt == PF_DUPTO)
 743                         printf(" dup-to");
 744                 else if (r->rt == PF_FASTROUTE)
 745                         printf(" fastroute");
 746                 if (r->rt != PF_FASTROUTE) {
 747                         printf(" ");
 748                         print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
 749                 }
 750         }
 751         if (r->af) {
 752                 if (r->af == AF_INET)
 753                         printf(" inet");
 754                 else
 755                         printf(" inet6");
 756         }
 757         if (r->proto) {
 758                 struct protoent *p;
 759
 760                 if ((p = getprotobynumber(r->proto)) != NULL)
 761                         printf(" proto %s", p->p_name);
 762                 else
 763                         printf(" proto %u", r->proto);
 764         }
 765         print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
 766             verbose);
 767         if (r->uid.op)
 768                 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
 769                     UID_MAX);
 770         if (r->gid.op)
 771                 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
 772                     GID_MAX);
 773         if (r->flags || r->flagset) {
 774                 printf(" flags ");
 775                 print_flags(r->flags);
 776                 printf("/");
 777                 print_flags(r->flagset);
 778         }
 779         if (r->type) {
 780                 const struct icmptypeent        *it;
 781
 782                 it = geticmptypebynumber(r->type-1, r->af);
 783                 if (r->af != AF_INET6)
 784                         printf(" icmp-type");
 785                 else
 786                         printf(" icmp6-type");
 787                 if (it != NULL)
 788                         printf(" %s", it->name);
 789                 else
 790                         printf(" %u", r->type-1);
 791                 if (r->code) {
 792                         const struct icmpcodeent        *ic;
 793
 794                         ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
 795                         if (ic != NULL)
 796                                 printf(" code %s", ic->name);
 797                         else
 798                                 printf(" code %u", r->code-1);
 799                 }
 800         }
 801         if (r->tos)
 802                 printf(" tos 0x%2.2x", r->tos);
 803         if (r->keep_state == PF_STATE_NORMAL)
 804                 printf(" keep state");
 805         else if (r->keep_state == PF_STATE_MODULATE)
 806                 printf(" modulate state");
 807         else if (r->keep_state == PF_STATE_SYNPROXY)
 808                 printf(" synproxy state");
 809         if (r->prob) {
 810                 char    buf[20];
 811
 812                 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
 813                 for (i = strlen(buf)-1; i > 0; i--) {
 814                         if (buf[i] == '0')
 815                                 buf[i] = '\0';
 816                         else {
 817                                 if (buf[i] == '.')
 818                                         buf[i] = '\0';
 819                                 break;
 820                         }
 821                 }
 822                 printf(" probability %s%%", buf);
 823         }
 824         opts = 0;
 825         if (r->max_states || r->max_src_nodes || r->max_src_states)
 826                 opts = 1;
 827         if (r->rule_flag & PFRULE_NOSYNC)
 828                 opts = 1;
 829         if (r->rule_flag & PFRULE_SRCTRACK)
 830                 opts = 1;
 831         if (r->rule_flag & (PFRULE_IFBOUND | PFRULE_GRBOUND))
 832                 opts = 1;
 833         for (i = 0; !opts && i < PFTM_MAX; ++i)
 834                 if (r->timeout[i])
 835                         opts = 1;
 836         if (opts) {
 837                 printf(" (");
 838                 if (r->max_states) {
 839                         printf("max %u", r->max_states);
 840                         opts = 0;
 841                 }
 842                 if (r->rule_flag & PFRULE_NOSYNC) {
 843                         if (!opts)
 844                                 printf(", ");
 845                         printf("no-sync");
 846                         opts = 0;
 847                 }
 848                 if (r->rule_flag & PFRULE_SRCTRACK) {
 849                         if (!opts)
 850                                 printf(", ");
 851                         printf("source-track");
 852                         if (r->rule_flag & PFRULE_RULESRCTRACK)
 853                                 printf(" rule");
 854                         else
 855                                 printf(" global");
 856                         opts = 0;
 857                 }
 858                 if (r->max_src_states) {
 859                         if (!opts)
 860                                 printf(", ");
 861                         printf("max-src-states %u", r->max_src_states);
 862                         opts = 0;
 863                 }
 864                 if (r->max_src_conn) {
 865                         if (!opts)
 866                                 printf(", ");
 867                         printf("max-src-conn %u", r->max_src_conn);
 868                         opts = 0;
 869                 }
 870                 if (r->max_src_conn_rate.limit) {
 871                         if (!opts)
 872                                 printf(", ");
 873                         printf("max-src-conn-rate %u/%u",
 874                             r->max_src_conn_rate.limit,
 875                             r->max_src_conn_rate.seconds);
 876                         opts = 0;
 877                 }
 878                 if (r->max_src_nodes) {
 879                         if (!opts)
 880                                 printf(", ");
 881                         printf("max-src-nodes %u", r->max_src_nodes);
 882                         opts = 0;
 883                 }
 884                 if (r->overload_tblname[0]) {
 885                         if (!opts)
 886                                 printf(", ");
 887                         printf("overload <%s>", r->overload_tblname);
 888                         if (r->flush)
 889                                 printf(" flush");
 890                         if (r->flush & PF_FLUSH_GLOBAL)
 891                                 printf(" global");
 892                 }
 893                 if (r->rule_flag & PFRULE_IFBOUND) {
 894                         if (!opts)
 895                                 printf(", ");
 896                         printf("if-bound");
 897                         opts = 0;
 898                 }
 899                 if (r->rule_flag & PFRULE_GRBOUND) {
 900                         if (!opts)
 901                                 printf(", ");
 902                         printf("group-bound");
 903                         opts = 0;
 904                 }
 905                 for (i = 0; i < PFTM_MAX; ++i)
 906                         if (r->timeout[i]) {
 907                                 int j;
 908
 909                                 if (!opts)
 910                                         printf(", ");
 911                                 opts = 0;
 912                                 for (j = 0; j < sizeof(pf_timeouts) /
 913                                     sizeof(pf_timeouts[0]); ++j)
 914                                         if (pf_timeouts[j].timeout == i)
 915                                                 break;
 916                                 printf("%s %u", j == PFTM_MAX ?  "inv.timeout" :
 917                                     pf_timeouts[j].name, r->timeout[i]);
 918                         }
 919                 printf(")");
 920         }
 921         if (r->rule_flag & PFRULE_FRAGMENT)
 922                 printf(" fragment");
 923         if (r->rule_flag & PFRULE_NODF)
 924                 printf(" no-df");
 925         if (r->rule_flag & PFRULE_RANDOMID)
 926                 printf(" random-id");
 927         if (r->min_ttl)
 928                 printf(" min-ttl %d", r->min_ttl);
 929         if (r->max_mss)
 930                 printf(" max-mss %d", r->max_mss);
 931         if (r->allow_opts)
 932                 printf(" allow-opts");
 933         if (r->action == PF_SCRUB) {
 934                 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
 935                         printf(" reassemble tcp");
 936
 937                 if (r->rule_flag & PFRULE_FRAGDROP)
 938                         printf(" fragment drop-ovl");
 939                 else if (r->rule_flag & PFRULE_FRAGCROP)
 940                         printf(" fragment crop");
 941                 else
 942                         printf(" fragment reassemble");
 943         }
 944         if (r->label[0])
 945                 printf(" label \"%s\"", r->label);
 946         if (r->qname[0] && r->pqname[0])
 947                 printf(" queue(%s, %s)", r->qname, r->pqname);
 948         else if (r->qname[0])
 949                 printf(" queue %s", r->qname);
 950         if (r->tagname[0])
 951                 printf(" tag %s", r->tagname);
 952         if (r->match_tagname[0]) {
 953                 if (r->match_tag_not)
 954                         printf(" !");
 955                 printf(" tagged %s", r->match_tagname);
 956         }
 957         if (!anchor_call[0] && (r->action == PF_NAT ||
 958             r->action == PF_BINAT || r->action == PF_RDR)) {
 959                 printf(" -> ");
 960                 print_pool(&r->rpool, r->rpool.proxy_port[0],
 961                     r->rpool.proxy_port[1], r->af, r->action);
 962         }
 963         printf("\n");
 964 }
 965
 966 void
 967 print_tabledef(const char *name, int flags, int addrs,
 968     struct node_tinithead *nodes)
 969 {
 970         struct node_tinit       *ti, *nti;
 971         struct node_host        *h;
 972
 973         printf("table <%s>", name);
 974         if (flags & PFR_TFLAG_CONST)
 975                 printf(" const");
 976         if (flags & PFR_TFLAG_PERSIST)
 977                 printf(" persist");
 978         SIMPLEQ_FOREACH(ti, nodes, entries) {
 979                 if (ti->file) {
 980                         printf(" file \"%s\"", ti->file);
 981                         continue;
 982                 }
 983                 printf(" {");
 984                 for (;;) {
 985                         for (h = ti->host; h != NULL; h = h->next) {
 986                                 printf(h->not ? " !" : " ");
 987                                 print_addr(&h->addr, h->af, 0);
 988                         }
 989                         nti = SIMPLEQ_NEXT(ti, entries);
 990                         if (nti != NULL && nti->file == NULL)
 991                                 ti = nti;       /* merge lists */
 992                         else
 993                                 break;
 994                 }
 995                 printf(" }");
 996         }
 997         if (addrs && SIMPLEQ_EMPTY(nodes))
 998                 printf(" { }");
 999         printf("\n");
1000 }
1001
1002 int
1003 parse_flags(char *s)
1004 {
1005         char            *p, *q;
1006         u_int8_t         f = 0;
1007
1008         for (p = s; *p; p++) {
1009                 if ((q = strchr(tcpflags, *p)) == NULL)
1010                         return -1;
1011                 else
1012                         f |= 1 << (q - tcpflags);
1013         }
1014         return (f ? f : PF_TH_ALL);
1015 }
1016
1017 void
1018 set_ipmask(struct node_host *h, u_int8_t b)
1019 {
1020         struct pf_addr  *m, *n;
1021         int              i, j = 0;
1022
1023         m = &h->addr.v.a.mask;
1024         memset(m, 0, sizeof(*m));
1025
1026         while (b >= 32) {
1027                 m->addr32[j++] = 0xffffffff;
1028                 b -= 32;
1029         }
1030         for (i = 31; i > 31-b; --i)
1031                 m->addr32[j] |= (1 << i);
1032         if (b)
1033                 m->addr32[j] = htonl(m->addr32[j]);
1034
1035         /* Mask off bits of the address that will never be used. */
1036         n = &h->addr.v.a.addr;
1037         if (h->addr.type == PF_ADDR_ADDRMASK)
1038                 for (i = 0; i < 4; i++)
1039                         n->addr32[i] = n->addr32[i] & m->addr32[i];
1040 }
1041
1042 int
1043 check_netmask(struct node_host *h, sa_family_t af)
1044 {
1045         struct node_host        *n = NULL;
1046         struct pf_addr  *m;
1047
1048         for (n = h; n != NULL; n = n->next) {
1049                 if (h->addr.type == PF_ADDR_TABLE)
1050                         continue;
1051                 m = &h->addr.v.a.mask;
1052                 /* fix up netmask for dynaddr */
1053                 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1054                     unmask(m, AF_INET6) > 32)
1055                         set_ipmask(n, 32);
1056                 /* netmasks > 32 bit are invalid on v4 */
1057                 if (af == AF_INET &&
1058                     (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1059                         fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1060                             unmask(m, AF_INET6));
1061                         return (1);
1062                 }
1063         }
1064         return (0);
1065 }
1066
1067 /* interface lookup routines */
1068
1069 struct node_host        *iftab;
1070
1071 void
1072 ifa_load(void)
1073 {
1074         struct ifaddrs          *ifap, *ifa;
1075         struct node_host        *n = NULL, *h = NULL;
1076
1077         if (getifaddrs(&ifap) < 0)
1078                 err(1, "getifaddrs");
1079
1080         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1081                 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1082                     ifa->ifa_addr->sa_family == AF_INET6 ||
1083                     ifa->ifa_addr->sa_family == AF_LINK))
1084                                 continue;
1085                 n = calloc(1, sizeof(struct node_host));
1086                 if (n == NULL)
1087                         err(1, "address: calloc");
1088                 n->af = ifa->ifa_addr->sa_family;
1089                 n->ifa_flags = ifa->ifa_flags;
1090 #ifdef __KAME__
1091                 if (n->af == AF_INET6 &&
1092                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1093                     ifa->ifa_addr)->sin6_addr) &&
1094                     ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1095                     0) {
1096                         struct sockaddr_in6     *sin6;
1097
1098                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1099                         sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1100                             sin6->sin6_addr.s6_addr[3];
1101                         sin6->sin6_addr.s6_addr[2] = 0;
1102                         sin6->sin6_addr.s6_addr[3] = 0;
1103                 }
1104 #endif
1105                 n->ifindex = 0;
1106                 if (n->af == AF_INET) {
1107                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1108                             ifa->ifa_addr)->sin_addr.s_addr,
1109                             sizeof(struct in_addr));
1110                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1111                             ifa->ifa_netmask)->sin_addr.s_addr,
1112                             sizeof(struct in_addr));
1113                         if (ifa->ifa_broadaddr != NULL)
1114                                 memcpy(&n->bcast, &((struct sockaddr_in *)
1115                                     ifa->ifa_broadaddr)->sin_addr.s_addr,
1116                                     sizeof(struct in_addr));
1117                         if (ifa->ifa_dstaddr != NULL)
1118                                 memcpy(&n->peer, &((struct sockaddr_in *)
1119                                     ifa->ifa_dstaddr)->sin_addr.s_addr,
1120                                     sizeof(struct in_addr));
1121                 } else if (n->af == AF_INET6) {
1122                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1123                             ifa->ifa_addr)->sin6_addr.s6_addr,
1124                             sizeof(struct in6_addr));
1125                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1126                             ifa->ifa_netmask)->sin6_addr.s6_addr,
1127                             sizeof(struct in6_addr));
1128                         if (ifa->ifa_broadaddr != NULL)
1129                                 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1130                                     ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1131                                     sizeof(struct in6_addr));
1132                         if (ifa->ifa_dstaddr != NULL)
1133                                  memcpy(&n->peer, &((struct sockaddr_in6 *)
1134                                     ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1135                                     sizeof(struct in6_addr));
1136                         n->ifindex = ((struct sockaddr_in6 *)
1137                             ifa->ifa_addr)->sin6_scope_id;
1138                 }
1139                 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1140                         err(1, "ifa_load: strdup");
1141                 n->next = NULL;
1142                 n->tail = n;
1143                 if (h == NULL)
1144                         h = n;
1145                 else {
1146                         h->tail->next = n;
1147                         h->tail = n;
1148                 }
1149         }
1150
1151         iftab = h;
1152         freeifaddrs(ifap);
1153 }
1154
1155 struct node_host *
1156 ifa_exists(const char *ifa_name, int group_ok)
1157 {
1158         struct node_host        *n;
1159
1160         if (iftab == NULL)
1161                 ifa_load();
1162
1163         for (n = iftab; n; n = n->next) {
1164                 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1165                         return (n);
1166         }
1167
1168         return (NULL);
1169 }
1170
1171 struct node_host *
1172 ifa_lookup(const char *ifa_name, int flags)
1173 {
1174         struct node_host        *p = NULL, *h = NULL, *n = NULL;
1175         int                      got4 = 0, got6 = 0;
1176         const char               *last_if = NULL;
1177
1178         if (!strncmp(ifa_name, "self", IFNAMSIZ))
1179                 ifa_name = NULL;
1180
1181         if (iftab == NULL)
1182                 ifa_load();
1183
1184         for (p = iftab; p; p = p->next) {
1185                 if (ifa_skip_if(ifa_name, p))
1186                         continue;
1187                 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1188                         continue;
1189                 if ((flags & PFI_AFLAG_BROADCAST) &&
1190                     !(p->ifa_flags & IFF_BROADCAST))
1191                         continue;
1192                 if ((flags & PFI_AFLAG_PEER) &&
1193                     !(p->ifa_flags & IFF_POINTOPOINT))
1194                         continue;
1195                 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1196                         continue;
1197                 if (last_if == NULL || strcmp(last_if, p->ifname))
1198                         got4 = got6 = 0;
1199                 last_if = p->ifname;
1200                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1201                         continue;
1202                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1203                         continue;
1204                 if (p->af == AF_INET)
1205                         got4 = 1;
1206                 else
1207                         got6 = 1;
1208                 n = calloc(1, sizeof(struct node_host));
1209                 if (n == NULL)
1210                         err(1, "address: calloc");
1211                 n->af = p->af;
1212                 if (flags & PFI_AFLAG_BROADCAST)
1213                         memcpy(&n->addr.v.a.addr, &p->bcast,
1214                             sizeof(struct pf_addr));
1215                 else if (flags & PFI_AFLAG_PEER)
1216                         memcpy(&n->addr.v.a.addr, &p->peer,
1217                             sizeof(struct pf_addr));
1218                 else
1219                         memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1220                             sizeof(struct pf_addr));
1221                 if (flags & PFI_AFLAG_NETWORK)
1222                         set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1223                 else {
1224                         if (n->af == AF_INET) {
1225                                 if (p->ifa_flags & IFF_LOOPBACK &&
1226                                     p->ifa_flags & IFF_LINK1)
1227                                         memcpy(&n->addr.v.a.mask,
1228                                             &p->addr.v.a.mask,
1229                                             sizeof(struct pf_addr));
1230                                 else
1231                                         set_ipmask(n, 32);
1232                         } else
1233                                 set_ipmask(n, 128);
1234                 }
1235                 n->ifindex = p->ifindex;
1236
1237                 n->next = NULL;
1238                 n->tail = n;
1239                 if (h == NULL)
1240                         h = n;
1241                 else {
1242                         h->tail->next = n;
1243                         h->tail = n;
1244                 }
1245         }
1246         return (h);
1247 }
1248
1249 int
1250 ifa_skip_if(const char *filter, struct node_host *p)
1251 {
1252         int     n;
1253
1254         if (p->af != AF_INET && p->af != AF_INET6)
1255                 return (1);
1256         if (filter == NULL || !*filter)
1257                 return (0);
1258         if (!strcmp(p->ifname, filter))
1259                 return (0);     /* exact match */
1260         n = strlen(filter);
1261         if (n < 1 || n >= IFNAMSIZ)
1262                 return (1);     /* sanity check */
1263         if (filter[n-1] >= '0' && filter[n-1] <= '9')
1264                 return (1);     /* only do exact match in that case */
1265         if (strncmp(p->ifname, filter, n))
1266                 return (1);     /* prefix doesn't match */
1267         return (p->ifname[n] < '0' || p->ifname[n] > '9');
1268 }
1269
1270
1271 struct node_host *
1272 host(const char *s)
1273 {
1274         struct node_host        *h = NULL;
1275         int                      mask, v4mask, v6mask, cont = 1;
1276         char                    *p, *q, *ps;
1277
1278         if ((p = strrchr(s, '/')) != NULL) {
1279                 mask = strtol(p+1, &q, 0);
1280                 if (!q || *q || mask > 128 || q == (p+1)) {
1281                         fprintf(stderr, "invalid netmask '%s'\n", p);
1282                         return (NULL);
1283                 }
1284                 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1285                         err(1, "host: malloc");
1286                 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1287                 v4mask = v6mask = mask;
1288         } else {
1289                 if ((ps = strdup(s)) == NULL)
1290                         err(1, "host: strdup");
1291                 v4mask = 32;
1292                 v6mask = 128;
1293                 mask = -1;
1294         }
1295
1296         /* interface with this name exists? */
1297         if (cont && (h = host_if(ps, mask)) != NULL)
1298                 cont = 0;
1299
1300         /* IPv4 address? */
1301         if (cont && (h = host_v4(s, mask)) != NULL)
1302                 cont = 0;
1303
1304         /* IPv6 address? */
1305         if (cont && (h = host_v6(ps, v6mask)) != NULL)
1306                 cont = 0;
1307
1308         /* dns lookup */
1309         if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1310                 cont = 0;
1311         free(ps);
1312
1313         if (h == NULL || cont == 1) {
1314                 fprintf(stderr, "no IP address found for %s\n", s);
1315                 return (NULL);
1316         }
1317         return (h);
1318 }
1319
1320 struct node_host *
1321 host_if(const char *s, int mask)
1322 {
1323         struct node_host        *n, *h = NULL;
1324         char                    *p, *ps;
1325         int                      flags = 0;
1326
1327         if ((ps = strdup(s)) == NULL)
1328                 err(1, "host_if: strdup");
1329         while ((p = strrchr(ps, ':')) != NULL) {
1330                 if (!strcmp(p+1, "network"))
1331                         flags |= PFI_AFLAG_NETWORK;
1332                 else if (!strcmp(p+1, "broadcast"))
1333                         flags |= PFI_AFLAG_BROADCAST;
1334                 else if (!strcmp(p+1, "peer"))
1335                         flags |= PFI_AFLAG_PEER;
1336                 else if (!strcmp(p+1, "0"))
1337                         flags |= PFI_AFLAG_NOALIAS;
1338                 else {
1339                         free(ps);
1340                         return (NULL);
1341                 }
1342                 *p = '\0';
1343         }
1344         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1345                 fprintf(stderr, "illegal combination of interface modifiers\n");
1346                 free(ps);
1347                 return (NULL);
1348         }
1349         if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1350                 fprintf(stderr, "network or broadcast lookup, but "
1351                     "extra netmask given\n");
1352                 free(ps);
1353                 return (NULL);
1354         }
1355         if (ifa_exists(ps, 1) || !strncmp(ps, "self", IFNAMSIZ)) {
1356                 /* interface with this name exists */
1357                 h = ifa_lookup(ps, flags);
1358                 for (n = h; n != NULL && mask > -1; n = n->next)
1359                         set_ipmask(n, mask);
1360         }
1361
1362         free(ps);
1363         return (h);
1364 }
1365
1366 struct node_host *
1367 host_v4(const char *s, int mask)
1368 {
1369         struct node_host        *h = NULL;
1370         struct in_addr           ina;
1371         int                      bits = 32;
1372
1373         memset(&ina, 0, sizeof(struct in_addr));
1374         if (strrchr(s, '/') != NULL) {
1375                 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1376                         return (NULL);
1377         } else {
1378                 if (inet_pton(AF_INET, s, &ina) != 1)
1379                         return (NULL);
1380         }
1381
1382         h = calloc(1, sizeof(struct node_host));
1383         if (h == NULL)
1384                 err(1, "address: calloc");
1385         h->ifname = NULL;
1386         h->af = AF_INET;
1387         h->addr.v.a.addr.addr32[0] = ina.s_addr;
1388         set_ipmask(h, bits);
1389         h->next = NULL;
1390         h->tail = h;
1391
1392         return (h);
1393 }
1394
1395 struct node_host *
1396 host_v6(const char *s, int mask)
1397 {
1398         struct addrinfo          hints, *res;
1399         struct node_host        *h = NULL;
1400
1401         memset(&hints, 0, sizeof(hints));
1402         hints.ai_family = AF_INET6;
1403         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1404         hints.ai_flags = AI_NUMERICHOST;
1405         if (getaddrinfo(s, "0", &hints, &res) == 0) {
1406                 h = calloc(1, sizeof(struct node_host));
1407                 if (h == NULL)
1408                         err(1, "address: calloc");
1409                 h->ifname = NULL;
1410                 h->af = AF_INET6;
1411                 memcpy(&h->addr.v.a.addr,
1412                     &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1413                     sizeof(h->addr.v.a.addr));
1414                 h->ifindex =
1415                     ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1416                 set_ipmask(h, mask);
1417                 freeaddrinfo(res);
1418                 h->next = NULL;
1419                 h->tail = h;
1420         }
1421
1422         return (h);
1423 }
1424
1425 struct node_host *
1426 host_dns(const char *s, int v4mask, int v6mask)
1427 {
1428         struct addrinfo          hints, *res0, *res;
1429         struct node_host        *n, *h = NULL;
1430         int                      error, noalias = 0;
1431         int                      got4 = 0, got6 = 0;
1432         char                    *p, *ps;
1433
1434         if ((ps = strdup(s)) == NULL)
1435                 err(1, "host_dns: strdup");
1436         if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1437                 noalias = 1;
1438                 *p = '\0';
1439         }
1440         memset(&hints, 0, sizeof(hints));
1441         hints.ai_family = PF_UNSPEC;
1442         hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1443         error = getaddrinfo(ps, NULL, &hints, &res0);
1444         if (error) {
1445                 free(ps);
1446                 return (h);
1447         }
1448
1449         for (res = res0; res; res = res->ai_next) {
1450                 if (res->ai_family != AF_INET &&
1451                     res->ai_family != AF_INET6)
1452                         continue;
1453                 if (noalias) {
1454                         if (res->ai_family == AF_INET) {
1455                                 if (got4)
1456                                         continue;
1457                                 got4 = 1;
1458                         } else {
1459                                 if (got6)
1460                                         continue;
1461                                 got6 = 1;
1462                         }
1463                 }
1464                 n = calloc(1, sizeof(struct node_host));
1465                 if (n == NULL)
1466                         err(1, "host_dns: calloc");
1467                 n->ifname = NULL;
1468                 n->af = res->ai_family;
1469                 if (res->ai_family == AF_INET) {
1470                         memcpy(&n->addr.v.a.addr,
1471                             &((struct sockaddr_in *)
1472                             res->ai_addr)->sin_addr.s_addr,
1473                             sizeof(struct in_addr));
1474                         set_ipmask(n, v4mask);
1475                 } else {
1476                         memcpy(&n->addr.v.a.addr,
1477                             &((struct sockaddr_in6 *)
1478                             res->ai_addr)->sin6_addr.s6_addr,
1479                             sizeof(struct in6_addr));
1480                         n->ifindex =
1481                             ((struct sockaddr_in6 *)
1482                             res->ai_addr)->sin6_scope_id;
1483                         set_ipmask(n, v6mask);
1484                 }
1485                 n->next = NULL;
1486                 n->tail = n;
1487                 if (h == NULL)
1488                         h = n;
1489                 else {
1490                         h->tail->next = n;
1491                         h->tail = n;
1492                 }
1493         }
1494         freeaddrinfo(res0);
1495         free(ps);
1496
1497         return (h);
1498 }
1499
1500 /*
1501  * convert a hostname to a list of addresses and put them in the given buffer.
1502  * test:
1503  *      if set to 1, only simple addresses are accepted (no netblock, no "!").
1504  */
1505 int
1506 append_addr(struct pfr_buffer *b, char *s, int test)
1507 {
1508         char                     *r;
1509         struct node_host        *h, *n;
1510         int                      rv, not = 0;
1511
1512         for (r = s; *r == '!'; r++)
1513                 not = !not;
1514         if ((n = host(r)) == NULL) {
1515                 errno = 0;
1516                 return (-1);
1517         }
1518         rv = append_addr_host(b, n, test, not);
1519         do {
1520                 h = n;
1521                 n = n->next;
1522                 free(h);
1523         } while (n != NULL);
1524         return (rv);
1525 }
1526
1527 /*
1528  * same as previous function, but with a pre-parsed input and the ability
1529  * to "negate" the result. Does not free the node_host list.
1530  * not:
1531  *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1532  */
1533 int
1534 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1535 {
1536         int                      bits;
1537         struct pfr_addr          addr;
1538
1539         do {
1540                 bzero(&addr, sizeof(addr));
1541                 addr.pfra_not = n->not ^ not;
1542                 addr.pfra_af = n->af;
1543                 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1544                 switch (n->af) {
1545                 case AF_INET:
1546                         addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1547                         bits = 32;
1548                         break;
1549                 case AF_INET6:
1550                         memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1551                             sizeof(struct in6_addr));
1552                         bits = 128;
1553                         break;
1554                 default:
1555                         errno = EINVAL;
1556                         return (-1);
1557                 }
1558                 if ((test && (not || addr.pfra_net != bits)) ||
1559                     addr.pfra_net > bits) {
1560                         errno = EINVAL;
1561                         return (-1);
1562                 }
1563                 if (pfr_buf_add(b, &addr))
1564                         return (-1);
1565         } while ((n = n->next) != NULL);
1566
1567         return (0);
1568 }
1569
1570 int
1571 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1572 {
1573         struct pfioc_trans_e trans;
1574
1575         bzero(&trans, sizeof(trans));
1576         trans.rs_num = rs_num;
1577         if (strlcpy(trans.anchor, anchor,
1578             sizeof(trans.anchor)) >= sizeof(trans.anchor))
1579                 errx(1, "pfctl_add_trans: strlcpy");
1580
1581         return pfr_buf_add(buf, &trans);
1582 }
1583
1584 u_int32_t
1585 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1586 {
1587         struct pfioc_trans_e *p;
1588
1589         PFRB_FOREACH(p, buf)
1590                 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1591                         return (p->ticket);
1592         errx(1, "pfctl_get_ticket: assertion failed");
1593 }
1594
1595 int
1596 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1597 {
1598         struct pfioc_trans trans;
1599
1600         bzero(&trans, sizeof(trans));
1601         trans.size = buf->pfrb_size - from;
1602         trans.esize = sizeof(struct pfioc_trans_e);
1603         trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1604         return ioctl(dev, cmd, &trans);
1605 }