contrib/pf/pfctl/pfctl_parser.c

   1 /*      $OpenBSD: pfctl_parser.c,v 1.234 2006/10/31 23:46:24 mcbride Exp $ */
   2
   3 /*
   4  * Copyright (c) 2001 Daniel Hartmeier
   5  * Copyright (c) 2002,2003 Henning Brauer
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  *    - Redistributions of source code must retain the above copyright
  13  *      notice, this list of conditions and the following disclaimer.
  14  *    - Redistributions in binary form must reproduce the above
  15  *      copyright notice, this list of conditions and the following
  16  *      disclaimer in the documentation and/or other materials provided
  17  *      with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  22  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  23  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  25  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  27  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  29  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/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 #include <unistd.h>
  62
  63 #include "pfctl_parser.h"
  64 #include "pfctl.h"
  65
  66 void             print_op (u_int8_t, const char *, const char *);
  67 void             print_port (u_int8_t, u_int16_t, u_int16_t, const char *);
  68 void             print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
  69 void             print_flags (u_int8_t);
  70 void             print_fromto(struct pf_rule_addr *, pf_osfp_t,
  71                     struct pf_rule_addr *, u_int8_t, u_int8_t, int);
  72 int              ifa_skip_if(const char *filter, struct node_host *p);
  73
  74 struct node_host        *ifa_grouplookup(const char *, int);
  75 struct node_host        *host_if(const char *, int);
  76 struct node_host        *host_v4(const char *, int);
  77 struct node_host        *host_v6(const char *, int);
  78 struct node_host        *host_dns(const char *, int, int);
  79
  80 const char *tcpflags = "FSRPAUEW";
  81
  82 static const struct icmptypeent icmp_type[] = {
  83         { "echoreq",    ICMP_ECHO },
  84         { "echorep",    ICMP_ECHOREPLY },
  85         { "unreach",    ICMP_UNREACH },
  86         { "squench",    ICMP_SOURCEQUENCH },
  87         { "redir",      ICMP_REDIRECT },
  88         { "althost",    ICMP_ALTHOSTADDR },
  89         { "routeradv",  ICMP_ROUTERADVERT },
  90         { "routersol",  ICMP_ROUTERSOLICIT },
  91         { "timex",      ICMP_TIMXCEED },
  92         { "paramprob",  ICMP_PARAMPROB },
  93         { "timereq",    ICMP_TSTAMP },
  94         { "timerep",    ICMP_TSTAMPREPLY },
  95         { "inforeq",    ICMP_IREQ },
  96         { "inforep",    ICMP_IREQREPLY },
  97         { "maskreq",    ICMP_MASKREQ },
  98         { "maskrep",    ICMP_MASKREPLY },
  99         { "trace",      ICMP_TRACEROUTE },
 100         { "dataconv",   ICMP_DATACONVERR },
 101         { "mobredir",   ICMP_MOBILE_REDIRECT },
 102         { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
 103         { "ipv6-here",  ICMP_IPV6_IAMHERE },
 104         { "mobregreq",  ICMP_MOBILE_REGREQUEST },
 105         { "mobregrep",  ICMP_MOBILE_REGREPLY },
 106         { "skip",       ICMP_SKIP },
 107         { "photuris",   ICMP_PHOTURIS }
 108 };
 109
 110 static const struct icmptypeent icmp6_type[] = {
 111         { "unreach",    ICMP6_DST_UNREACH },
 112         { "toobig",     ICMP6_PACKET_TOO_BIG },
 113         { "timex",      ICMP6_TIME_EXCEEDED },
 114         { "paramprob",  ICMP6_PARAM_PROB },
 115         { "echoreq",    ICMP6_ECHO_REQUEST },
 116         { "echorep",    ICMP6_ECHO_REPLY },
 117         { "groupqry",   ICMP6_MEMBERSHIP_QUERY },
 118         { "listqry",    MLD_LISTENER_QUERY },
 119         { "grouprep",   ICMP6_MEMBERSHIP_REPORT },
 120         { "listenrep",  MLD_LISTENER_REPORT },
 121         { "groupterm",  ICMP6_MEMBERSHIP_REDUCTION },
 122         { "listendone", MLD_LISTENER_DONE },
 123         { "routersol",  ND_ROUTER_SOLICIT },
 124         { "routeradv",  ND_ROUTER_ADVERT },
 125         { "neighbrsol", ND_NEIGHBOR_SOLICIT },
 126         { "neighbradv", ND_NEIGHBOR_ADVERT },
 127         { "redir",      ND_REDIRECT },
 128         { "routrrenum", ICMP6_ROUTER_RENUMBERING },
 129         { "wrureq",     ICMP6_WRUREQUEST },
 130         { "wrurep",     ICMP6_WRUREPLY },
 131         { "fqdnreq",    ICMP6_FQDN_QUERY },
 132         { "fqdnrep",    ICMP6_FQDN_REPLY },
 133         { "niqry",      ICMP6_NI_QUERY },
 134         { "nirep",      ICMP6_NI_REPLY },
 135         { "mtraceresp", MLD_MTRACE_RESP },
 136         { "mtrace",     MLD_MTRACE }
 137 };
 138
 139 static const struct icmpcodeent icmp_code[] = {
 140         { "net-unr",            ICMP_UNREACH,   ICMP_UNREACH_NET },
 141         { "host-unr",           ICMP_UNREACH,   ICMP_UNREACH_HOST },
 142         { "proto-unr",          ICMP_UNREACH,   ICMP_UNREACH_PROTOCOL },
 143         { "port-unr",           ICMP_UNREACH,   ICMP_UNREACH_PORT },
 144         { "needfrag",           ICMP_UNREACH,   ICMP_UNREACH_NEEDFRAG },
 145         { "srcfail",            ICMP_UNREACH,   ICMP_UNREACH_SRCFAIL },
 146         { "net-unk",            ICMP_UNREACH,   ICMP_UNREACH_NET_UNKNOWN },
 147         { "host-unk",           ICMP_UNREACH,   ICMP_UNREACH_HOST_UNKNOWN },
 148         { "isolate",            ICMP_UNREACH,   ICMP_UNREACH_ISOLATED },
 149         { "net-prohib",         ICMP_UNREACH,   ICMP_UNREACH_NET_PROHIB },
 150         { "host-prohib",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PROHIB },
 151         { "net-tos",            ICMP_UNREACH,   ICMP_UNREACH_TOSNET },
 152         { "host-tos",           ICMP_UNREACH,   ICMP_UNREACH_TOSHOST },
 153         { "filter-prohib",      ICMP_UNREACH,   ICMP_UNREACH_FILTER_PROHIB },
 154         { "host-preced",        ICMP_UNREACH,   ICMP_UNREACH_HOST_PRECEDENCE },
 155         { "cutoff-preced",      ICMP_UNREACH,   ICMP_UNREACH_PRECEDENCE_CUTOFF },
 156         { "redir-net",          ICMP_REDIRECT,  ICMP_REDIRECT_NET },
 157         { "redir-host",         ICMP_REDIRECT,  ICMP_REDIRECT_HOST },
 158         { "redir-tos-net",      ICMP_REDIRECT,  ICMP_REDIRECT_TOSNET },
 159         { "redir-tos-host",     ICMP_REDIRECT,  ICMP_REDIRECT_TOSHOST },
 160         { "normal-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
 161         { "common-adv",         ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
 162         { "transit",            ICMP_TIMXCEED,  ICMP_TIMXCEED_INTRANS },
 163         { "reassemb",           ICMP_TIMXCEED,  ICMP_TIMXCEED_REASS },
 164         { "badhead",            ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
 165         { "optmiss",            ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
 166         { "badlen",             ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
 167         { "unknown-ind",        ICMP_PHOTURIS,  ICMP_PHOTURIS_UNKNOWN_INDEX },
 168         { "auth-fail",          ICMP_PHOTURIS,  ICMP_PHOTURIS_AUTH_FAILED },
 169         { "decrypt-fail",       ICMP_PHOTURIS,  ICMP_PHOTURIS_DECRYPT_FAILED }
 170 };
 171
 172 static const struct icmpcodeent icmp6_code[] = {
 173         { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
 174         { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
 175         { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
 176         { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
 177         { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
 178         { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
 179         { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
 180         { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
 181         { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
 182         { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
 183         { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
 184         { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
 185 };
 186
 187 const struct pf_timeout pf_timeouts[] = {
 188         { "tcp.first",          PFTM_TCP_FIRST_PACKET },
 189         { "tcp.opening",        PFTM_TCP_OPENING },
 190         { "tcp.established",    PFTM_TCP_ESTABLISHED },
 191         { "tcp.closing",        PFTM_TCP_CLOSING },
 192         { "tcp.finwait",        PFTM_TCP_FIN_WAIT },
 193         { "tcp.closed",         PFTM_TCP_CLOSED },
 194         { "tcp.tsdiff",         PFTM_TS_DIFF },
 195         { "udp.first",          PFTM_UDP_FIRST_PACKET },
 196         { "udp.single",         PFTM_UDP_SINGLE },
 197         { "udp.multiple",       PFTM_UDP_MULTIPLE },
 198         { "icmp.first",         PFTM_ICMP_FIRST_PACKET },
 199         { "icmp.error",         PFTM_ICMP_ERROR_REPLY },
 200         { "other.first",        PFTM_OTHER_FIRST_PACKET },
 201         { "other.single",       PFTM_OTHER_SINGLE },
 202         { "other.multiple",     PFTM_OTHER_MULTIPLE },
 203         { "frag",               PFTM_FRAG },
 204         { "interval",           PFTM_INTERVAL },
 205         { "adaptive.start",     PFTM_ADAPTIVE_START },
 206         { "adaptive.end",       PFTM_ADAPTIVE_END },
 207         { "src.track",          PFTM_SRC_NODE },
 208         { NULL,                 0 }
 209 };
 210
 211 const struct icmptypeent *
 212 geticmptypebynumber(u_int8_t type, sa_family_t af)
 213 {
 214         unsigned int    i;
 215
 216         if (af != AF_INET6) {
 217                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 218                     i++) {
 219                         if (type == icmp_type[i].type)
 220                                 return (&icmp_type[i]);
 221                 }
 222         } else {
 223                 for (i=0; i < (sizeof (icmp6_type) /
 224                     sizeof(icmp6_type[0])); i++) {
 225                         if (type == icmp6_type[i].type)
 226                                  return (&icmp6_type[i]);
 227                 }
 228         }
 229         return (NULL);
 230 }
 231
 232 const struct icmptypeent *
 233 geticmptypebyname(char *w, sa_family_t af)
 234 {
 235         unsigned int    i;
 236
 237         if (af != AF_INET6) {
 238                 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
 239                     i++) {
 240                         if (!strcmp(w, icmp_type[i].name))
 241                                 return (&icmp_type[i]);
 242                 }
 243         } else {
 244                 for (i=0; i < (sizeof (icmp6_type) /
 245                     sizeof(icmp6_type[0])); i++) {
 246                         if (!strcmp(w, icmp6_type[i].name))
 247                                 return (&icmp6_type[i]);
 248                 }
 249         }
 250         return (NULL);
 251 }
 252
 253 const struct icmpcodeent *
 254 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
 255 {
 256         unsigned int    i;
 257
 258         if (af != AF_INET6) {
 259                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 260                     i++) {
 261                         if (type == icmp_code[i].type &&
 262                             code == icmp_code[i].code)
 263                                 return (&icmp_code[i]);
 264                 }
 265         } else {
 266                 for (i=0; i < (sizeof (icmp6_code) /
 267                     sizeof(icmp6_code[0])); i++) {
 268                         if (type == icmp6_code[i].type &&
 269                             code == icmp6_code[i].code)
 270                                 return (&icmp6_code[i]);
 271                 }
 272         }
 273         return (NULL);
 274 }
 275
 276 const struct icmpcodeent *
 277 geticmpcodebyname(u_long type, char *w, sa_family_t af)
 278 {
 279         unsigned int    i;
 280
 281         if (af != AF_INET6) {
 282                 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
 283                     i++) {
 284                         if (type == icmp_code[i].type &&
 285                             !strcmp(w, icmp_code[i].name))
 286                                 return (&icmp_code[i]);
 287                 }
 288         } else {
 289                 for (i=0; i < (sizeof (icmp6_code) /
 290                     sizeof(icmp6_code[0])); i++) {
 291                         if (type == icmp6_code[i].type &&
 292                             !strcmp(w, icmp6_code[i].name))
 293                                 return (&icmp6_code[i]);
 294                 }
 295         }
 296         return (NULL);
 297 }
 298
 299 void
 300 print_op(u_int8_t op, const char *a1, const char *a2)
 301 {
 302         if (op == PF_OP_IRG)
 303                 printf(" %s >< %s", a1, a2);
 304         else if (op == PF_OP_XRG)
 305                 printf(" %s <> %s", a1, a2);
 306         else if (op == PF_OP_EQ)
 307                 printf(" = %s", a1);
 308         else if (op == PF_OP_NE)
 309                 printf(" != %s", a1);
 310         else if (op == PF_OP_LT)
 311                 printf(" < %s", a1);
 312         else if (op == PF_OP_LE)
 313                 printf(" <= %s", a1);
 314         else if (op == PF_OP_GT)
 315                 printf(" > %s", a1);
 316         else if (op == PF_OP_GE)
 317                 printf(" >= %s", a1);
 318         else if (op == PF_OP_RRG)
 319                 printf(" %s:%s", a1, a2);
 320 }
 321
 322 void
 323 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto)
 324 {
 325         char             a1[6], a2[6];
 326         struct servent  *s;
 327
 328         s = getservbyport(p1, proto);
 329         p1 = ntohs(p1);
 330         p2 = ntohs(p2);
 331         snprintf(a1, sizeof(a1), "%u", p1);
 332         snprintf(a2, sizeof(a2), "%u", p2);
 333         printf(" port");
 334         if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
 335                 print_op(op, s->s_name, a2);
 336         else
 337                 print_op(op, a1, a2);
 338 }
 339
 340 void
 341 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
 342 {
 343         char    a1[11], a2[11];
 344
 345         snprintf(a1, sizeof(a1), "%u", u1);
 346         snprintf(a2, sizeof(a2), "%u", u2);
 347         printf(" %s", t);
 348         if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
 349                 print_op(op, "unknown", a2);
 350         else
 351                 print_op(op, a1, a2);
 352 }
 353
 354 void
 355 print_flags(u_int8_t f)
 356 {
 357         int     i;
 358
 359         for (i = 0; tcpflags[i]; ++i)
 360                 if (f & (1 << i))
 361                         printf("%c", tcpflags[i]);
 362 }
 363
 364 void
 365 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
 366     sa_family_t af, u_int8_t proto, int verbose)
 367 {
 368         char buf[PF_OSFP_LEN*3];
 369         if (src->addr.type == PF_ADDR_ADDRMASK &&
 370             dst->addr.type == PF_ADDR_ADDRMASK &&
 371             PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
 372             PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
 373             PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
 374             PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
 375             !src->neg && !dst->neg &&
 376             !src->port_op && !dst->port_op &&
 377             osfp == PF_OSFP_ANY)
 378                 printf(" all");
 379         else {
 380                 printf(" from ");
 381                 if (src->neg)
 382                         printf("! ");
 383                 print_addr(&src->addr, af, verbose);
 384                 if (src->port_op)
 385                         print_port(src->port_op, src->port[0],
 386                             src->port[1],
 387                             proto == IPPROTO_TCP ? "tcp" : "udp");
 388                 if (osfp != PF_OSFP_ANY)
 389                         printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
 390                             sizeof(buf)));
 391
 392                 printf(" to ");
 393                 if (dst->neg)
 394                         printf("! ");
 395                 print_addr(&dst->addr, af, verbose);
 396                 if (dst->port_op)
 397                         print_port(dst->port_op, dst->port[0],
 398                             dst->port[1],
 399                             proto == IPPROTO_TCP ? "tcp" : "udp");
 400         }
 401 }
 402
 403 void
 404 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
 405     sa_family_t af, int id)
 406 {
 407         struct pf_pooladdr      *pooladdr;
 408
 409         if ((TAILQ_FIRST(&pool->list) != NULL) &&
 410             TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 411                 printf("{ ");
 412         TAILQ_FOREACH(pooladdr, &pool->list, entries){
 413                 switch (id) {
 414                 case PF_NAT:
 415                 case PF_RDR:
 416                 case PF_BINAT:
 417                         print_addr(&pooladdr->addr, af, 0);
 418                         break;
 419                 case PF_PASS:
 420                         if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
 421                                 printf("%s", pooladdr->ifname);
 422                         else {
 423                                 printf("(%s ", pooladdr->ifname);
 424                                 print_addr(&pooladdr->addr, af, 0);
 425                                 printf(")");
 426                         }
 427                         break;
 428                 default:
 429                         break;
 430                 }
 431                 if (TAILQ_NEXT(pooladdr, entries) != NULL)
 432                         printf(", ");
 433                 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
 434                         printf(" }");
 435         }
 436         switch (id) {
 437         case PF_NAT:
 438                 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
 439                     p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
 440                         if (p1 == p2)
 441                                 printf(" port %u", p1);
 442                         else
 443                                 printf(" port %u:%u", p1, p2);
 444                 }
 445                 break;
 446         case PF_RDR:
 447                 if (p1) {
 448                         printf(" port %u", p1);
 449                         if (p2 && (p2 != p1))
 450                                 printf(":%u", p2);
 451                 }
 452                 break;
 453         default:
 454                 break;
 455         }
 456         switch (pool->opts & PF_POOL_TYPEMASK) {
 457         case PF_POOL_NONE:
 458                 break;
 459         case PF_POOL_BITMASK:
 460                 printf(" bitmask");
 461                 break;
 462         case PF_POOL_RANDOM:
 463                 printf(" random");
 464                 break;
 465         case PF_POOL_SRCHASH:
 466                 printf(" source-hash 0x%08x%08x%08x%08x",
 467                     pool->key.key32[0], pool->key.key32[1],
 468                     pool->key.key32[2], pool->key.key32[3]);
 469                 break;
 470         case PF_POOL_ROUNDROBIN:
 471                 printf(" round-robin");
 472                 break;
 473         }
 474         if (pool->opts & PF_POOL_STICKYADDR)
 475                 printf(" sticky-address");
 476         if (id == PF_NAT && p1 == 0 && p2 == 0)
 477                 printf(" static-port");
 478 }
 479
 480 const char      *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
 481 const char      *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
 482 const char      *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
 483 const char      *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
 484
 485 void
 486 print_status(struct pf_status *s, int opts)
 487 {
 488         char                    statline[80], *running;
 489         time_t                  runtime;
 490         int                     i;
 491         char                    buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
 492         static const char       hex[] = "0123456789abcdef";
 493
 494         runtime = time(NULL) - s->since;
 495         running = s->running ? "Enabled" : "Disabled";
 496
 497         if (s->since) {
 498                 unsigned        sec, min, hrs, day = runtime;
 499
 500                 sec = day % 60;
 501                 day /= 60;
 502                 min = day % 60;
 503                 day /= 60;
 504                 hrs = day % 24;
 505                 day /= 24;
 506                 snprintf(statline, sizeof(statline),
 507                     "Status: %s for %u days %.2u:%.2u:%.2u",
 508                     running, day, hrs, min, sec);
 509         } else
 510                 snprintf(statline, sizeof(statline), "Status: %s", running);
 511         printf("%-44s", statline);
 512         switch (s->debug) {
 513         case PF_DEBUG_NONE:
 514                 printf("%15s\n\n", "Debug: None");
 515                 break;
 516         case PF_DEBUG_URGENT:
 517                 printf("%15s\n\n", "Debug: Urgent");
 518                 break;
 519         case PF_DEBUG_MISC:
 520                 printf("%15s\n\n", "Debug: Misc");
 521                 break;
 522         case PF_DEBUG_NOISY:
 523                 printf("%15s\n\n", "Debug: Loud");
 524                 break;
 525         }
 526
 527         if (opts & PF_OPT_VERBOSE) {
 528                 printf("Hostid:   0x%08x\n", ntohl(s->hostid));
 529
 530                 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
 531                         buf[i + i] = hex[s->pf_chksum[i] >> 4];
 532                         buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
 533                 }
 534                 buf[i + i] = '\0';
 535                 printf("Checksum: 0x%s\n\n", buf);
 536         }
 537
 538         if (s->ifname[0] != 0) {
 539                 printf("Interface Stats for %-16s %5s %16s\n",
 540                     s->ifname, "IPv4", "IPv6");
 541                 printf("  %-25s %14llu %16llu\n", "Bytes In",
 542                     (unsigned long long)s->bcounters[0][0],
 543                     (unsigned long long)s->bcounters[1][0]);
 544                 printf("  %-25s %14llu %16llu\n", "Bytes Out",
 545                     (unsigned long long)s->bcounters[0][1],
 546                     (unsigned long long)s->bcounters[1][1]);
 547                 printf("  Packets In\n");
 548                 printf("    %-23s %14llu %16llu\n", "Passed",
 549                     (unsigned long long)s->pcounters[0][0][PF_PASS],
 550                     (unsigned long long)s->pcounters[1][0][PF_PASS]);
 551                 printf("    %-23s %14llu %16llu\n", "Blocked",
 552                     (unsigned long long)s->pcounters[0][0][PF_DROP],
 553                     (unsigned long long)s->pcounters[1][0][PF_DROP]);
 554                 printf("  Packets Out\n");
 555                 printf("    %-23s %14llu %16llu\n", "Passed",
 556                     (unsigned long long)s->pcounters[0][1][PF_PASS],
 557                     (unsigned long long)s->pcounters[1][1][PF_PASS]);
 558                 printf("    %-23s %14llu %16llu\n\n", "Blocked",
 559                     (unsigned long long)s->pcounters[0][1][PF_DROP],
 560                     (unsigned long long)s->pcounters[1][1][PF_DROP]);
 561         }
 562         printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
 563         printf("  %-25s %14u %14s\n", "current entries", s->states, "");
 564         for (i = 0; i < FCNT_MAX; i++) {
 565                 printf("  %-25s %14llu ", pf_fcounters[i],
 566                             (unsigned long long)s->fcounters[i]);
 567                 if (runtime > 0)
 568                         printf("%14.1f/s\n",
 569                             (double)s->fcounters[i] / (double)runtime);
 570                 else
 571                         printf("%14s\n", "");
 572         }
 573         if (opts & PF_OPT_VERBOSE) {
 574                 printf("Source Tracking Table\n");
 575                 printf("  %-25s %14u %14s\n", "current entries",
 576                     s->src_nodes, "");
 577                 for (i = 0; i < SCNT_MAX; i++) {
 578                         printf("  %-25s %14lld ", pf_scounters[i],
 579                                    (unsigned long long)s->scounters[i]);
 580                         if (runtime > 0)
 581                                 printf("%14.1f/s\n",
 582                                     (double)s->scounters[i] / (double)runtime);
 583                         else
 584                                 printf("%14s\n", "");
 585                 }
 586         }
 587         printf("Counters\n");
 588         for (i = 0; i < PFRES_MAX; i++) {
 589                 printf("  %-25s %14llu ", pf_reasons[i],
 590                     (unsigned long long)s->counters[i]);
 591                 if (runtime > 0)
 592                         printf("%14.1f/s\n",
 593                             (double)s->counters[i] / (double)runtime);
 594                 else
 595                         printf("%14s\n", "");
 596         }
 597         if (opts & PF_OPT_VERBOSE) {
 598                 printf("Limit Counters\n");
 599                 for (i = 0; i < LCNT_MAX; i++) {
 600                         printf("  %-25s %14lld ", pf_lcounters[i],
 601 #ifdef __FreeBSD__
 602                                     (unsigned long long)s->lcounters[i]);
 603 #else
 604                                     s->lcounters[i]);
 605 #endif
 606                         if (runtime > 0)
 607                                 printf("%14.1f/s\n",
 608                                     (double)s->lcounters[i] / (double)runtime);
 609                         else
 610                                 printf("%14s\n", "");
 611                 }
 612         }
 613 }
 614
 615 void
 616 print_src_node(struct pf_src_node *sn, int opts)
 617 {
 618         struct pf_addr_wrap aw;
 619         int min, sec;
 620
 621         memset(&aw, 0, sizeof(aw));
 622         if (sn->af == AF_INET)
 623                 aw.v.a.mask.addr32[0] = 0xffffffff;
 624         else
 625                 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
 626
 627         aw.v.a.addr = sn->addr;
 628         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 629         printf(" -> ");
 630         aw.v.a.addr = sn->raddr;
 631         print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
 632         printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
 633             sn->conn, sn->conn_rate.count / 1000,
 634             (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
 635         if (opts & PF_OPT_VERBOSE) {
 636                 sec = sn->creation % 60;
 637                 sn->creation /= 60;
 638                 min = sn->creation % 60;
 639                 sn->creation /= 60;
 640                 printf("   age %.2u:%.2u:%.2u", sn->creation, min, sec);
 641                 if (sn->states == 0) {
 642                         sec = sn->expire % 60;
 643                         sn->expire /= 60;
 644                         min = sn->expire % 60;
 645                         sn->expire /= 60;
 646                         printf(", expires in %.2u:%.2u:%.2u",
 647                             sn->expire, min, sec);
 648                 }
 649                 printf(", %llu pkts, %llu bytes",
 650 #ifdef __FreeBSD__
 651                     (unsigned long long)(sn->packets[0] + sn->packets[1]),
 652                     (unsigned long long)(sn->bytes[0] + sn->bytes[1]));
 653 #else
 654                     sn->packets[0] + sn->packets[1],
 655                     sn->bytes[0] + sn->bytes[1]);
 656 #endif
 657                 switch (sn->ruletype) {
 658                 case PF_NAT:
 659                         if (sn->rule.nr != -1)
 660                                 printf(", nat rule %u", sn->rule.nr);
 661                         break;
 662                 case PF_RDR:
 663                         if (sn->rule.nr != -1)
 664                                 printf(", rdr rule %u", sn->rule.nr);
 665                         break;
 666                 case PF_PASS:
 667                         if (sn->rule.nr != -1)
 668                                 printf(", filter rule %u", sn->rule.nr);
 669                         break;
 670                 }
 671                 printf("\n");
 672         }
 673 }
 674
 675 void
 676 print_rule(struct pf_rule *r, const char *anchor_call, int verbose)
 677 {
 678         static const char *actiontypes[] = { "pass", "block", "scrub",
 679             "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
 680         static const char *anchortypes[] = { "anchor", "anchor", "anchor",
 681             "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
 682             "binat-anchor", "rdr-anchor", "rdr-anchor" };
 683         int     i, opts;
 684
 685         if (verbose)
 686                 printf("@%d ", r->nr);
 687         if (r->action > PF_NORDR)
 688                 printf("action(%d)", r->action);
 689         else if (anchor_call[0]) {
 690                 if (anchor_call[0] == '_') {
 691                         printf("%s", anchortypes[r->action]);
 692                 } else
 693                         printf("%s \"%s\"", anchortypes[r->action],
 694                             anchor_call);
 695         } else {
 696                 printf("%s", actiontypes[r->action]);
 697                 if (r->natpass)
 698                         printf(" pass");
 699         }
 700         if (r->action == PF_DROP) {
 701                 if (r->rule_flag & PFRULE_RETURN)
 702                         printf(" return");
 703                 else if (r->rule_flag & PFRULE_RETURNRST) {
 704                         if (!r->return_ttl)
 705                                 printf(" return-rst");
 706                         else
 707                                 printf(" return-rst(ttl %d)", r->return_ttl);
 708                 } else if (r->rule_flag & PFRULE_RETURNICMP) {
 709                         const struct icmpcodeent        *ic, *ic6;
 710
 711                         ic = geticmpcodebynumber(r->return_icmp >> 8,
 712                             r->return_icmp & 255, AF_INET);
 713                         ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
 714                             r->return_icmp6 & 255, AF_INET6);
 715
 716                         switch (r->af) {
 717                         case AF_INET:
 718                                 printf(" return-icmp");
 719                                 if (ic == NULL)
 720                                         printf("(%u)", r->return_icmp & 255);
 721                                 else
 722                                         printf("(%s)", ic->name);
 723                                 break;
 724                         case AF_INET6:
 725                                 printf(" return-icmp6");
 726                                 if (ic6 == NULL)
 727                                         printf("(%u)", r->return_icmp6 & 255);
 728                                 else
 729                                         printf("(%s)", ic6->name);
 730                                 break;
 731                         default:
 732                                 printf(" return-icmp");
 733                                 if (ic == NULL)
 734                                         printf("(%u, ", r->return_icmp & 255);
 735                                 else
 736                                         printf("(%s, ", ic->name);
 737                                 if (ic6 == NULL)
 738                                         printf("%u)", r->return_icmp6 & 255);
 739                                 else
 740                                         printf("%s)", ic6->name);
 741                                 break;
 742                         }
 743                 } else
 744                         printf(" drop");
 745         }
 746         if (r->direction == PF_IN)
 747                 printf(" in");
 748         else if (r->direction == PF_OUT)
 749                 printf(" out");
 750         if (r->log) {
 751                 printf(" log");
 752                 if (r->log & ~PF_LOG || r->logif) {
 753                         int count = 0;
 754
 755                         printf(" (");
 756                         if (r->log & PF_LOG_ALL)
 757                                 printf("%sall", count++ ? ", " : "");
 758                         if (r->log & PF_LOG_SOCKET_LOOKUP)
 759                                 printf("%suser", count++ ? ", " : "");
 760                         if (r->logif)
 761                                 printf("%sto pflog%u", count++ ? ", " : "",
 762                                     r->logif);
 763                         printf(")");
 764                 }
 765         }
 766         if (r->quick)
 767                 printf(" quick");
 768         if (r->ifname[0]) {
 769                 if (r->ifnot)
 770                         printf(" on ! %s", r->ifname);
 771                 else
 772                         printf(" on %s", r->ifname);
 773         }
 774         if (r->rt) {
 775                 if (r->rt == PF_ROUTETO)
 776                         printf(" route-to");
 777                 else if (r->rt == PF_REPLYTO)
 778                         printf(" reply-to");
 779                 else if (r->rt == PF_DUPTO)
 780                         printf(" dup-to");
 781                 else if (r->rt == PF_FASTROUTE)
 782                         printf(" fastroute");
 783                 if (r->rt != PF_FASTROUTE) {
 784                         printf(" ");
 785                         print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
 786                 }
 787         }
 788         if (r->af) {
 789                 if (r->af == AF_INET)
 790                         printf(" inet");
 791                 else
 792                         printf(" inet6");
 793         }
 794         if (r->proto) {
 795                 struct protoent *p;
 796
 797                 if ((p = getprotobynumber(r->proto)) != NULL)
 798                         printf(" proto %s", p->p_name);
 799                 else
 800                         printf(" proto %u", r->proto);
 801         }
 802         print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
 803             verbose);
 804         if (r->uid.op)
 805                 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
 806                     UID_MAX);
 807         if (r->gid.op)
 808                 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
 809                     GID_MAX);
 810         if (r->flags || r->flagset) {
 811                 printf(" flags ");
 812                 print_flags(r->flags);
 813                 printf("/");
 814                 print_flags(r->flagset);
 815         } else if (r->action == PF_PASS &&
 816             (!r->proto || r->proto == IPPROTO_TCP) &&
 817             !(r->rule_flag & PFRULE_FRAGMENT) &&
 818             !anchor_call[0] && r->keep_state)
 819                 printf(" flags any");
 820         if (r->type) {
 821                 const struct icmptypeent        *it;
 822
 823                 it = geticmptypebynumber(r->type-1, r->af);
 824                 if (r->af != AF_INET6)
 825                         printf(" icmp-type");
 826                 else
 827                         printf(" icmp6-type");
 828                 if (it != NULL)
 829                         printf(" %s", it->name);
 830                 else
 831                         printf(" %u", r->type-1);
 832                 if (r->code) {
 833                         const struct icmpcodeent        *ic;
 834
 835                         ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
 836                         if (ic != NULL)
 837                                 printf(" code %s", ic->name);
 838                         else
 839                                 printf(" code %u", r->code-1);
 840                 }
 841         }
 842         if (r->tos)
 843                 printf(" tos 0x%2.2x", r->tos);
 844         if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
 845                 printf(" no state");
 846         else if (r->keep_state == PF_STATE_NORMAL)
 847                 printf(" keep state");
 848         else if (r->keep_state == PF_STATE_MODULATE)
 849                 printf(" modulate state");
 850         else if (r->keep_state == PF_STATE_SYNPROXY)
 851                 printf(" synproxy state");
 852         if (r->prob) {
 853                 char    buf[20];
 854
 855                 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
 856                 for (i = strlen(buf)-1; i > 0; i--) {
 857                         if (buf[i] == '0')
 858                                 buf[i] = '\0';
 859                         else {
 860                                 if (buf[i] == '.')
 861                                         buf[i] = '\0';
 862                                 break;
 863                         }
 864                 }
 865                 printf(" probability %s%%", buf);
 866         }
 867         opts = 0;
 868         if (r->max_states || r->max_src_nodes || r->max_src_states)
 869                 opts = 1;
 870         if (r->rule_flag & PFRULE_NOSYNC)
 871                 opts = 1;
 872         if (r->rule_flag & PFRULE_SRCTRACK)
 873                 opts = 1;
 874         if (r->rule_flag & PFRULE_IFBOUND)
 875                 opts = 1;
 876         if (r->rule_flag & PFRULE_STATESLOPPY)
 877                 opts = 1;
 878         for (i = 0; !opts && i < PFTM_MAX; ++i)
 879                 if (r->timeout[i])
 880                         opts = 1;
 881         if (opts) {
 882                 printf(" (");
 883                 if (r->max_states) {
 884                         printf("max %u", r->max_states);
 885                         opts = 0;
 886                 }
 887                 if (r->rule_flag & PFRULE_NOSYNC) {
 888                         if (!opts)
 889                                 printf(", ");
 890                         printf("no-sync");
 891                         opts = 0;
 892                 }
 893                 if (r->rule_flag & PFRULE_SRCTRACK) {
 894                         if (!opts)
 895                                 printf(", ");
 896                         printf("source-track");
 897                         if (r->rule_flag & PFRULE_RULESRCTRACK)
 898                                 printf(" rule");
 899                         else
 900                                 printf(" global");
 901                         opts = 0;
 902                 }
 903                 if (r->max_src_states) {
 904                         if (!opts)
 905                                 printf(", ");
 906                         printf("max-src-states %u", r->max_src_states);
 907                         opts = 0;
 908                 }
 909                 if (r->max_src_conn) {
 910                         if (!opts)
 911                                 printf(", ");
 912                         printf("max-src-conn %u", r->max_src_conn);
 913                         opts = 0;
 914                 }
 915                 if (r->max_src_conn_rate.limit) {
 916                         if (!opts)
 917                                 printf(", ");
 918                         printf("max-src-conn-rate %u/%u",
 919                             r->max_src_conn_rate.limit,
 920                             r->max_src_conn_rate.seconds);
 921                         opts = 0;
 922                 }
 923                 if (r->max_src_nodes) {
 924                         if (!opts)
 925                                 printf(", ");
 926                         printf("max-src-nodes %u", r->max_src_nodes);
 927                         opts = 0;
 928                 }
 929                 if (r->overload_tblname[0]) {
 930                         if (!opts)
 931                                 printf(", ");
 932                         printf("overload <%s>", r->overload_tblname);
 933                         if (r->flush)
 934                                 printf(" flush");
 935                         if (r->flush & PF_FLUSH_GLOBAL)
 936                                 printf(" global");
 937                 }
 938                 if (r->rule_flag & PFRULE_IFBOUND) {
 939                         if (!opts)
 940                                 printf(", ");
 941                         printf("if-bound");
 942                         opts = 0;
 943                 }
 944                 if (r->rule_flag & PFRULE_STATESLOPPY) {
 945                         if (!opts)
 946                                 printf(", ");
 947                         printf("sloppy");
 948                         opts = 0;
 949                 }
 950                 for (i = 0; i < PFTM_MAX; ++i)
 951                         if (r->timeout[i]) {
 952                                 int j;
 953
 954                                 if (!opts)
 955                                         printf(", ");
 956                                 opts = 0;
 957                                 for (j = 0; pf_timeouts[j].name != NULL;
 958                                     ++j)
 959                                         if (pf_timeouts[j].timeout == i)
 960                                                 break;
 961                                 printf("%s %u", pf_timeouts[j].name == NULL ?
 962                                     "inv.timeout" : pf_timeouts[j].name,
 963                                     r->timeout[i]);
 964                         }
 965                 printf(")");
 966         }
 967         if (r->rule_flag & PFRULE_FRAGMENT)
 968                 printf(" fragment");
 969         if (r->rule_flag & PFRULE_NODF)
 970                 printf(" no-df");
 971         if (r->rule_flag & PFRULE_RANDOMID)
 972                 printf(" random-id");
 973         if (r->min_ttl)
 974                 printf(" min-ttl %d", r->min_ttl);
 975         if (r->max_mss)
 976                 printf(" max-mss %d", r->max_mss);
 977         if (r->allow_opts)
 978                 printf(" allow-opts");
 979         if (r->action == PF_SCRUB) {
 980                 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
 981                         printf(" reassemble tcp");
 982
 983                 if (r->rule_flag & PFRULE_FRAGDROP)
 984                         printf(" fragment drop-ovl");
 985                 else if (r->rule_flag & PFRULE_FRAGCROP)
 986                         printf(" fragment crop");
 987                 else
 988                         printf(" fragment reassemble");
 989         }
 990         if (r->label[0])
 991                 printf(" label \"%s\"", r->label);
 992         if (r->qname[0] && r->pqname[0])
 993                 printf(" queue(%s, %s)", r->qname, r->pqname);
 994         else if (r->qname[0])
 995                 printf(" queue %s", r->qname);
 996         if (r->tagname[0])
 997                 printf(" tag %s", r->tagname);
 998         if (r->match_tagname[0]) {
 999                 if (r->match_tag_not)
1000                         printf(" !");
1001                 printf(" tagged %s", r->match_tagname);
1002         }
1003         if (r->rtableid != -1)
1004                 printf(" rtable %u", r->rtableid);
1005         if (!anchor_call[0] && (r->action == PF_NAT ||
1006             r->action == PF_BINAT || r->action == PF_RDR)) {
1007                 printf(" -> ");
1008                 print_pool(&r->rpool, r->rpool.proxy_port[0],
1009                     r->rpool.proxy_port[1], r->af, r->action);
1010         }
1011 }
1012
1013 void
1014 print_tabledef(const char *name, int flags, int addrs,
1015     struct node_tinithead *nodes)
1016 {
1017         struct node_tinit       *ti, *nti;
1018         struct node_host        *h;
1019
1020         printf("table <%s>", name);
1021         if (flags & PFR_TFLAG_CONST)
1022                 printf(" const");
1023         if (flags & PFR_TFLAG_PERSIST)
1024                 printf(" persist");
1025         SIMPLEQ_FOREACH(ti, nodes, entries) {
1026                 if (ti->file) {
1027                         printf(" file \"%s\"", ti->file);
1028                         continue;
1029                 }
1030                 printf(" {");
1031                 for (;;) {
1032                         for (h = ti->host; h != NULL; h = h->next) {
1033                                 printf(h->not ? " !" : " ");
1034                                 print_addr(&h->addr, h->af, 0);
1035                         }
1036                         nti = SIMPLEQ_NEXT(ti, entries);
1037                         if (nti != NULL && nti->file == NULL)
1038                                 ti = nti;       /* merge lists */
1039                         else
1040                                 break;
1041                 }
1042                 printf(" }");
1043         }
1044         if (addrs && SIMPLEQ_EMPTY(nodes))
1045                 printf(" { }");
1046         printf("\n");
1047 }
1048
1049 int
1050 parse_flags(char *s)
1051 {
1052         char            *p, *q;
1053         u_int8_t         f = 0;
1054
1055         for (p = s; *p; p++) {
1056                 if ((q = strchr(tcpflags, *p)) == NULL)
1057                         return -1;
1058                 else
1059                         f |= 1 << (q - tcpflags);
1060         }
1061         return (f ? f : PF_TH_ALL);
1062 }
1063
1064 void
1065 set_ipmask(struct node_host *h, u_int8_t b)
1066 {
1067         struct pf_addr  *m, *n;
1068         int              i, j = 0;
1069
1070         m = &h->addr.v.a.mask;
1071         memset(m, 0, sizeof(*m));
1072
1073         while (b >= 32) {
1074                 m->addr32[j++] = 0xffffffff;
1075                 b -= 32;
1076         }
1077         for (i = 31; i > 31-b; --i)
1078                 m->addr32[j] |= (1 << i);
1079         if (b)
1080                 m->addr32[j] = htonl(m->addr32[j]);
1081
1082         /* Mask off bits of the address that will never be used. */
1083         n = &h->addr.v.a.addr;
1084         if (h->addr.type == PF_ADDR_ADDRMASK)
1085                 for (i = 0; i < 4; i++)
1086                         n->addr32[i] = n->addr32[i] & m->addr32[i];
1087 }
1088
1089 int
1090 check_netmask(struct node_host *h, sa_family_t af)
1091 {
1092         struct node_host        *n = NULL;
1093         struct pf_addr  *m;
1094
1095         for (n = h; n != NULL; n = n->next) {
1096                 if (h->addr.type == PF_ADDR_TABLE)
1097                         continue;
1098                 m = &h->addr.v.a.mask;
1099                 /* fix up netmask for dynaddr */
1100                 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1101                     unmask(m, AF_INET6) > 32)
1102                         set_ipmask(n, 32);
1103                 /* netmasks > 32 bit are invalid on v4 */
1104                 if (af == AF_INET &&
1105                     (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1106                         fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1107                             unmask(m, AF_INET6));
1108                         return (1);
1109                 }
1110         }
1111         return (0);
1112 }
1113
1114 /* interface lookup routines */
1115
1116 struct node_host        *iftab;
1117
1118 void
1119 ifa_load(void)
1120 {
1121         struct ifaddrs          *ifap, *ifa;
1122         struct node_host        *n = NULL, *h = NULL;
1123
1124         if (getifaddrs(&ifap) < 0)
1125                 err(1, "getifaddrs");
1126
1127         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1128                 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1129                     ifa->ifa_addr->sa_family == AF_INET6 ||
1130                     ifa->ifa_addr->sa_family == AF_LINK))
1131                                 continue;
1132                 n = calloc(1, sizeof(struct node_host));
1133                 if (n == NULL)
1134                         err(1, "address: calloc");
1135                 n->af = ifa->ifa_addr->sa_family;
1136                 n->ifa_flags = ifa->ifa_flags;
1137 #ifdef __KAME__
1138                 if (n->af == AF_INET6 &&
1139                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1140                     ifa->ifa_addr)->sin6_addr) &&
1141                     ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1142                     0) {
1143                         struct sockaddr_in6     *sin6;
1144
1145                         sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1146                         sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1147                             sin6->sin6_addr.s6_addr[3];
1148                         sin6->sin6_addr.s6_addr[2] = 0;
1149                         sin6->sin6_addr.s6_addr[3] = 0;
1150                 }
1151 #endif
1152                 n->ifindex = 0;
1153                 if (n->af == AF_INET) {
1154                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1155                             ifa->ifa_addr)->sin_addr.s_addr,
1156                             sizeof(struct in_addr));
1157                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1158                             ifa->ifa_netmask)->sin_addr.s_addr,
1159                             sizeof(struct in_addr));
1160                         if (ifa->ifa_broadaddr != NULL)
1161                                 memcpy(&n->bcast, &((struct sockaddr_in *)
1162                                     ifa->ifa_broadaddr)->sin_addr.s_addr,
1163                                     sizeof(struct in_addr));
1164                         if (ifa->ifa_dstaddr != NULL)
1165                                 memcpy(&n->peer, &((struct sockaddr_in *)
1166                                     ifa->ifa_dstaddr)->sin_addr.s_addr,
1167                                     sizeof(struct in_addr));
1168                 } else if (n->af == AF_INET6) {
1169                         memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1170                             ifa->ifa_addr)->sin6_addr.s6_addr,
1171                             sizeof(struct in6_addr));
1172                         memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1173                             ifa->ifa_netmask)->sin6_addr.s6_addr,
1174                             sizeof(struct in6_addr));
1175                         if (ifa->ifa_broadaddr != NULL)
1176                                 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1177                                     ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1178                                     sizeof(struct in6_addr));
1179                         if (ifa->ifa_dstaddr != NULL)
1180                                  memcpy(&n->peer, &((struct sockaddr_in6 *)
1181                                     ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1182                                     sizeof(struct in6_addr));
1183                         n->ifindex = ((struct sockaddr_in6 *)
1184                             ifa->ifa_addr)->sin6_scope_id;
1185                 }
1186                 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1187                         err(1, "ifa_load: strdup");
1188                 n->next = NULL;
1189                 n->tail = n;
1190                 if (h == NULL)
1191                         h = n;
1192                 else {
1193                         h->tail->next = n;
1194                         h->tail = n;
1195                 }
1196         }
1197
1198         iftab = h;
1199         freeifaddrs(ifap);
1200 }
1201
1202 struct node_host *
1203 ifa_exists(const char *ifa_name)
1204 {
1205         struct node_host        *n;
1206         struct ifgroupreq       ifgr;
1207         int                     s;
1208
1209         if (iftab == NULL)
1210                 ifa_load();
1211
1212         /* check wether this is a group */
1213         if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1214                 err(1, "socket");
1215         bzero(&ifgr, sizeof(ifgr));
1216         strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1217         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1218                 /* fake a node_host */
1219                 if ((n = calloc(1, sizeof(*n))) == NULL)
1220                         err(1, "calloc");
1221                 if ((n->ifname = strdup(ifa_name)) == NULL)
1222                         err(1, "strdup");
1223                 close(s);
1224                 return (n);
1225         }
1226         close(s);
1227
1228         for (n = iftab; n; n = n->next) {
1229                 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1230                         return (n);
1231         }
1232
1233         return (NULL);
1234 }
1235
1236 struct node_host *
1237 ifa_grouplookup(const char *ifa_name, int flags)
1238 {
1239         struct ifg_req          *ifg;
1240         struct ifgroupreq        ifgr;
1241         int                      s, len;
1242         struct node_host        *n, *h = NULL;
1243
1244         if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1245                 err(1, "socket");
1246         bzero(&ifgr, sizeof(ifgr));
1247         strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1248         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1249                 close(s);
1250                 return (NULL);
1251         }
1252
1253         len = ifgr.ifgr_len;
1254         if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1255                 err(1, "calloc");
1256         if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1257                 err(1, "SIOCGIFGMEMB");
1258
1259         for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1260             ifg++) {
1261                 len -= sizeof(struct ifg_req);
1262                 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1263                         continue;
1264                 if (h == NULL)
1265                         h = n;
1266                 else {
1267                         h->tail->next = n;
1268                         h->tail = n->tail;
1269                 }
1270         }
1271         free(ifgr.ifgr_groups);
1272         close(s);
1273
1274         return (h);
1275 }
1276
1277 struct node_host *
1278 ifa_lookup(const char *ifa_name, int flags)
1279 {
1280         struct node_host        *p = NULL, *h = NULL, *n = NULL;
1281         int                      got4 = 0, got6 = 0;
1282         const char               *last_if = NULL;
1283
1284         if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1285                 return (h);
1286
1287         if (!strncmp(ifa_name, "self", IFNAMSIZ))
1288                 ifa_name = NULL;
1289
1290         if (iftab == NULL)
1291                 ifa_load();
1292
1293         for (p = iftab; p; p = p->next) {
1294                 if (ifa_skip_if(ifa_name, p))
1295                         continue;
1296                 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1297                         continue;
1298                 if ((flags & PFI_AFLAG_BROADCAST) &&
1299                     !(p->ifa_flags & IFF_BROADCAST))
1300                         continue;
1301                 if ((flags & PFI_AFLAG_PEER) &&
1302                     !(p->ifa_flags & IFF_POINTOPOINT))
1303                         continue;
1304                 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1305                         continue;
1306                 if (last_if == NULL || strcmp(last_if, p->ifname))
1307                         got4 = got6 = 0;
1308                 last_if = p->ifname;
1309                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1310                         continue;
1311                 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1312                         continue;
1313                 if (p->af == AF_INET)
1314                         got4 = 1;
1315                 else
1316                         got6 = 1;
1317                 n = calloc(1, sizeof(struct node_host));
1318                 if (n == NULL)
1319                         err(1, "address: calloc");
1320                 n->af = p->af;
1321                 if (flags & PFI_AFLAG_BROADCAST)
1322                         memcpy(&n->addr.v.a.addr, &p->bcast,
1323                             sizeof(struct pf_addr));
1324                 else if (flags & PFI_AFLAG_PEER)
1325                         memcpy(&n->addr.v.a.addr, &p->peer,
1326                             sizeof(struct pf_addr));
1327                 else
1328                         memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1329                             sizeof(struct pf_addr));
1330                 if (flags & PFI_AFLAG_NETWORK)
1331                         set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1332                 else {
1333                         if (n->af == AF_INET) {
1334                                 if (p->ifa_flags & IFF_LOOPBACK &&
1335                                     p->ifa_flags & IFF_LINK1)
1336                                         memcpy(&n->addr.v.a.mask,
1337                                             &p->addr.v.a.mask,
1338                                             sizeof(struct pf_addr));
1339                                 else
1340                                         set_ipmask(n, 32);
1341                         } else
1342                                 set_ipmask(n, 128);
1343                 }
1344                 n->ifindex = p->ifindex;
1345
1346                 n->next = NULL;
1347                 n->tail = n;
1348                 if (h == NULL)
1349                         h = n;
1350                 else {
1351                         h->tail->next = n;
1352                         h->tail = n;
1353                 }
1354         }
1355         return (h);
1356 }
1357
1358 int
1359 ifa_skip_if(const char *filter, struct node_host *p)
1360 {
1361         int     n;
1362
1363         if (p->af != AF_INET && p->af != AF_INET6)
1364                 return (1);
1365         if (filter == NULL || !*filter)
1366                 return (0);
1367         if (!strcmp(p->ifname, filter))
1368                 return (0);     /* exact match */
1369         n = strlen(filter);
1370         if (n < 1 || n >= IFNAMSIZ)
1371                 return (1);     /* sanity check */
1372         if (filter[n-1] >= '0' && filter[n-1] <= '9')
1373                 return (1);     /* only do exact match in that case */
1374         if (strncmp(p->ifname, filter, n))
1375                 return (1);     /* prefix doesn't match */
1376         return (p->ifname[n] < '0' || p->ifname[n] > '9');
1377 }
1378
1379
1380 struct node_host *
1381 host(const char *s)
1382 {
1383         struct node_host        *h = NULL;
1384         int                      mask, v4mask, v6mask, cont = 1;
1385         char                    *p, *q, *ps;
1386
1387         if ((p = strrchr(s, '/')) != NULL) {
1388                 mask = strtol(p+1, &q, 0);
1389                 if (!q || *q || mask > 128 || q == (p+1)) {
1390                         fprintf(stderr, "invalid netmask '%s'\n", p);
1391                         return (NULL);
1392                 }
1393                 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1394                         err(1, "host: malloc");
1395                 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1396                 v4mask = v6mask = mask;
1397         } else {
1398                 if ((ps = strdup(s)) == NULL)
1399                         err(1, "host: strdup");
1400                 v4mask = 32;
1401                 v6mask = 128;
1402                 mask = -1;
1403         }
1404
1405         /* interface with this name exists? */
1406         if (cont && (h = host_if(ps, mask)) != NULL)
1407                 cont = 0;
1408
1409         /* IPv4 address? */
1410         if (cont && (h = host_v4(s, mask)) != NULL)
1411                 cont = 0;
1412
1413         /* IPv6 address? */
1414         if (cont && (h = host_v6(ps, v6mask)) != NULL)
1415                 cont = 0;
1416
1417         /* dns lookup */
1418         if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1419                 cont = 0;
1420         free(ps);
1421
1422         if (h == NULL || cont == 1) {
1423                 fprintf(stderr, "no IP address found for %s\n", s);
1424                 return (NULL);
1425         }
1426         return (h);
1427 }
1428
1429 struct node_host *
1430 host_if(const char *s, int mask)
1431 {
1432         struct node_host        *n, *h = NULL;
1433         char                    *p, *ps;
1434         int                      flags = 0;
1435
1436         if ((ps = strdup(s)) == NULL)
1437                 err(1, "host_if: strdup");
1438         while ((p = strrchr(ps, ':')) != NULL) {
1439                 if (!strcmp(p+1, "network"))
1440                         flags |= PFI_AFLAG_NETWORK;
1441                 else if (!strcmp(p+1, "broadcast"))
1442                         flags |= PFI_AFLAG_BROADCAST;
1443                 else if (!strcmp(p+1, "peer"))
1444                         flags |= PFI_AFLAG_PEER;
1445                 else if (!strcmp(p+1, "0"))
1446                         flags |= PFI_AFLAG_NOALIAS;
1447                 else {
1448                         free(ps);
1449                         return (NULL);
1450                 }
1451                 *p = '\0';
1452         }
1453         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1454                 fprintf(stderr, "illegal combination of interface modifiers\n");
1455                 free(ps);
1456                 return (NULL);
1457         }
1458         if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1459                 fprintf(stderr, "network or broadcast lookup, but "
1460                     "extra netmask given\n");
1461                 free(ps);
1462                 return (NULL);
1463         }
1464         if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1465                 /* interface with this name exists */
1466                 h = ifa_lookup(ps, flags);
1467                 for (n = h; n != NULL && mask > -1; n = n->next)
1468                         set_ipmask(n, mask);
1469         }
1470
1471         free(ps);
1472         return (h);
1473 }
1474
1475 struct node_host *
1476 host_v4(const char *s, int mask)
1477 {
1478         struct node_host        *h = NULL;
1479         struct in_addr           ina;
1480         int                      bits = 32;
1481
1482         memset(&ina, 0, sizeof(struct in_addr));
1483         if (strrchr(s, '/') != NULL) {
1484                 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1485                         return (NULL);
1486         } else {
1487                 if (inet_pton(AF_INET, s, &ina) != 1)
1488                         return (NULL);
1489         }
1490
1491         h = calloc(1, sizeof(struct node_host));
1492         if (h == NULL)
1493                 err(1, "address: calloc");
1494         h->ifname = NULL;
1495         h->af = AF_INET;
1496         h->addr.v.a.addr.addr32[0] = ina.s_addr;
1497         set_ipmask(h, bits);
1498         h->next = NULL;
1499         h->tail = h;
1500
1501         return (h);
1502 }
1503
1504 struct node_host *
1505 host_v6(const char *s, int mask)
1506 {
1507         struct addrinfo          hints, *res;
1508         struct node_host        *h = NULL;
1509
1510         memset(&hints, 0, sizeof(hints));
1511         hints.ai_family = AF_INET6;
1512         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1513         hints.ai_flags = AI_NUMERICHOST;
1514         if (getaddrinfo(s, "0", &hints, &res) == 0) {
1515                 h = calloc(1, sizeof(struct node_host));
1516                 if (h == NULL)
1517                         err(1, "address: calloc");
1518                 h->ifname = NULL;
1519                 h->af = AF_INET6;
1520                 memcpy(&h->addr.v.a.addr,
1521                     &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1522                     sizeof(h->addr.v.a.addr));
1523                 h->ifindex =
1524                     ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1525                 set_ipmask(h, mask);
1526                 freeaddrinfo(res);
1527                 h->next = NULL;
1528                 h->tail = h;
1529         }
1530
1531         return (h);
1532 }
1533
1534 struct node_host *
1535 host_dns(const char *s, int v4mask, int v6mask)
1536 {
1537         struct addrinfo          hints, *res0, *res;
1538         struct node_host        *n, *h = NULL;
1539         int                      error, noalias = 0;
1540         int                      got4 = 0, got6 = 0;
1541         char                    *p, *ps;
1542
1543         if ((ps = strdup(s)) == NULL)
1544                 err(1, "host_dns: strdup");
1545         if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1546                 noalias = 1;
1547                 *p = '\0';
1548         }
1549         memset(&hints, 0, sizeof(hints));
1550         hints.ai_family = PF_UNSPEC;
1551         hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1552         error = getaddrinfo(ps, NULL, &hints, &res0);
1553         if (error) {
1554                 free(ps);
1555                 return (h);
1556         }
1557
1558         for (res = res0; res; res = res->ai_next) {
1559                 if (res->ai_family != AF_INET &&
1560                     res->ai_family != AF_INET6)
1561                         continue;
1562                 if (noalias) {
1563                         if (res->ai_family == AF_INET) {
1564                                 if (got4)
1565                                         continue;
1566                                 got4 = 1;
1567                         } else {
1568                                 if (got6)
1569                                         continue;
1570                                 got6 = 1;
1571                         }
1572                 }
1573                 n = calloc(1, sizeof(struct node_host));
1574                 if (n == NULL)
1575                         err(1, "host_dns: calloc");
1576                 n->ifname = NULL;
1577                 n->af = res->ai_family;
1578                 if (res->ai_family == AF_INET) {
1579                         memcpy(&n->addr.v.a.addr,
1580                             &((struct sockaddr_in *)
1581                             res->ai_addr)->sin_addr.s_addr,
1582                             sizeof(struct in_addr));
1583                         set_ipmask(n, v4mask);
1584                 } else {
1585                         memcpy(&n->addr.v.a.addr,
1586                             &((struct sockaddr_in6 *)
1587                             res->ai_addr)->sin6_addr.s6_addr,
1588                             sizeof(struct in6_addr));
1589                         n->ifindex =
1590                             ((struct sockaddr_in6 *)
1591                             res->ai_addr)->sin6_scope_id;
1592                         set_ipmask(n, v6mask);
1593                 }
1594                 n->next = NULL;
1595                 n->tail = n;
1596                 if (h == NULL)
1597                         h = n;
1598                 else {
1599                         h->tail->next = n;
1600                         h->tail = n;
1601                 }
1602         }
1603         freeaddrinfo(res0);
1604         free(ps);
1605
1606         return (h);
1607 }
1608
1609 /*
1610  * convert a hostname to a list of addresses and put them in the given buffer.
1611  * test:
1612  *      if set to 1, only simple addresses are accepted (no netblock, no "!").
1613  */
1614 int
1615 append_addr(struct pfr_buffer *b, char *s, int test)
1616 {
1617         char                     *r;
1618         struct node_host        *h, *n;
1619         int                      rv, not = 0;
1620
1621         for (r = s; *r == '!'; r++)
1622                 not = !not;
1623         if ((n = host(r)) == NULL) {
1624                 errno = 0;
1625                 return (-1);
1626         }
1627         rv = append_addr_host(b, n, test, not);
1628         do {
1629                 h = n;
1630                 n = n->next;
1631                 free(h);
1632         } while (n != NULL);
1633         return (rv);
1634 }
1635
1636 /*
1637  * same as previous function, but with a pre-parsed input and the ability
1638  * to "negate" the result. Does not free the node_host list.
1639  * not:
1640  *      setting it to 1 is equivalent to adding "!" in front of parameter s.
1641  */
1642 int
1643 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1644 {
1645         int                      bits;
1646         struct pfr_addr          addr;
1647
1648         do {
1649                 bzero(&addr, sizeof(addr));
1650                 addr.pfra_not = n->not ^ not;
1651                 addr.pfra_af = n->af;
1652                 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1653                 switch (n->af) {
1654                 case AF_INET:
1655                         addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1656                         bits = 32;
1657                         break;
1658                 case AF_INET6:
1659                         memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1660                             sizeof(struct in6_addr));
1661                         bits = 128;
1662                         break;
1663                 default:
1664                         errno = EINVAL;
1665                         return (-1);
1666                 }
1667                 if ((test && (not || addr.pfra_net != bits)) ||
1668                     addr.pfra_net > bits) {
1669                         errno = EINVAL;
1670                         return (-1);
1671                 }
1672                 if (pfr_buf_add(b, &addr))
1673                         return (-1);
1674         } while ((n = n->next) != NULL);
1675
1676         return (0);
1677 }
1678
1679 int
1680 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1681 {
1682         struct pfioc_trans_e trans;
1683
1684         bzero(&trans, sizeof(trans));
1685         trans.rs_num = rs_num;
1686         if (strlcpy(trans.anchor, anchor,
1687             sizeof(trans.anchor)) >= sizeof(trans.anchor))
1688                 errx(1, "pfctl_add_trans: strlcpy");
1689
1690         return pfr_buf_add(buf, &trans);
1691 }
1692
1693 u_int32_t
1694 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1695 {
1696         struct pfioc_trans_e *p;
1697
1698         PFRB_FOREACH(p, buf)
1699                 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1700                         return (p->ticket);
1701         errx(1, "pfctl_get_ticket: assertion failed");
1702 }
1703
1704 int
1705 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1706 {
1707         struct pfioc_trans trans;
1708
1709         bzero(&trans, sizeof(trans));
1710         trans.size = buf->pfrb_size - from;
1711         trans.esize = sizeof(struct pfioc_trans_e);
1712         trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1713         return ioctl(dev, cmd, &trans);
1714 }