usr.sbin/pfctl/pf_print_state.c

   1 /*      $OpenBSD: pf_print_state.c,v 1.51 2008/06/29 08:42:15 mcbride Exp $     */
   2
   3 /*
   4  * Copyright (c) 2001 Daniel Hartmeier
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  *    - Redistributions of source code must retain the above copyright
  12  *      notice, this list of conditions and the following disclaimer.
  13  *    - Redistributions in binary form must reproduce the above
  14  *      copyright notice, this list of conditions and the following
  15  *      disclaimer in the documentation and/or other materials provided
  16  *      with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  22  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  26  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  28  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #define _KERNEL_STRUCTURES
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35 #include <sys/endian.h>
  36 #include <net/if.h>
  37 #define TCPSTATES
  38 #include <netinet/tcp_fsm.h>
  39 #include <net/pf/pfvar.h>
  40 #include <arpa/inet.h>
  41 #include <inttypes.h>
  42 #include <netdb.h>
  43
  44 #include <stdio.h>
  45 #include <string.h>
  46
  47 #include "pfctl_parser.h"
  48 #include "pfctl.h"
  49
  50 void    print_name(struct pf_addr *, sa_family_t);
  51
  52 void
  53 print_addr(struct pf_addr_wrap *addr, sa_family_t af, int verbose)
  54 {
  55         switch (addr->type) {
  56         case PF_ADDR_DYNIFTL:
  57                 printf("(%s", addr->v.ifname);
  58                 if (addr->iflags & PFI_AFLAG_NETWORK)
  59                         printf(":network");
  60                 if (addr->iflags & PFI_AFLAG_BROADCAST)
  61                         printf(":broadcast");
  62                 if (addr->iflags & PFI_AFLAG_PEER)
  63                         printf(":peer");
  64                 if (addr->iflags & PFI_AFLAG_NOALIAS)
  65                         printf(":0");
  66                 if (verbose) {
  67                         if (addr->p.dyncnt <= 0)
  68                                 printf(":*");
  69                         else
  70                                 printf(":%d", addr->p.dyncnt);
  71                 }
  72                 printf(")");
  73                 break;
  74         case PF_ADDR_TABLE:
  75                 if (verbose)
  76                         if (addr->p.tblcnt == -1)
  77                                 printf("<%s:*>", addr->v.tblname);
  78                         else
  79                                 printf("<%s:%d>", addr->v.tblname,
  80                                     addr->p.tblcnt);
  81                 else
  82                         printf("<%s>", addr->v.tblname);
  83                 return;
  84         case PF_ADDR_RANGE: {
  85                 char buf[48];
  86
  87                 if (inet_ntop(af, &addr->v.a.addr, buf, sizeof(buf)) == NULL)
  88                         printf("?");
  89                 else
  90                         printf("%s", buf);
  91                 if (inet_ntop(af, &addr->v.a.mask, buf, sizeof(buf)) == NULL)
  92                         printf(" - ?");
  93                 else
  94                         printf(" - %s", buf);
  95                 break;
  96         }
  97         case PF_ADDR_ADDRMASK:
  98                 if (PF_AZERO(&addr->v.a.addr, AF_INET6) &&
  99                     PF_AZERO(&addr->v.a.mask, AF_INET6))
 100                         printf("any");
 101                 else {
 102                         char buf[48];
 103
 104                         if (inet_ntop(af, &addr->v.a.addr, buf,
 105                             sizeof(buf)) == NULL)
 106                                 printf("?");
 107                         else
 108                                 printf("%s", buf);
 109                 }
 110                 break;
 111         case PF_ADDR_NOROUTE:
 112                 printf("no-route");
 113                 return;
 114         case PF_ADDR_URPFFAILED:
 115                 printf("urpf-failed");
 116                 return;
 117         case PF_ADDR_RTLABEL:
 118                 printf("route \"%s\"", addr->v.rtlabelname);
 119                 return;
 120         default:
 121                 printf("?");
 122                 return;
 123         }
 124
 125         /* mask if not _both_ address and mask are zero */
 126         if (addr->type != PF_ADDR_RANGE &&
 127             !(PF_AZERO(&addr->v.a.addr, AF_INET6) &&
 128             PF_AZERO(&addr->v.a.mask, AF_INET6))) {
 129                 int bits = unmask(&addr->v.a.mask, af);
 130
 131                 if (bits != (af == AF_INET ? 32 : 128))
 132                         printf("/%d", bits);
 133         }
 134 }
 135
 136 void
 137 print_name(struct pf_addr *addr, sa_family_t af)
 138 {
 139         char his_host[NI_MAXHOST];
 140
 141         strlcpy(his_host, "?", sizeof(his_host));
 142         switch (af) {
 143         case AF_INET: {
 144                 struct sockaddr_in sin;
 145
 146                 memset(&sin, 0, sizeof(sin));
 147                 sin.sin_len = sizeof(sin);
 148                 sin.sin_family = AF_INET;
 149                 sin.sin_addr = addr->v4;
 150                 getnameinfo((struct sockaddr *)&sin, sin.sin_len,
 151                     his_host, sizeof(his_host), NULL, 0, NI_NOFQDN);
 152                 break;
 153         }
 154         case AF_INET6: {
 155                 struct sockaddr_in6 sin6;
 156
 157                 memset(&sin6, 0, sizeof(sin6));
 158                 sin6.sin6_len = sizeof(sin6);
 159                 sin6.sin6_family = AF_INET6;
 160                 sin6.sin6_addr = addr->v6;
 161                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 162                     his_host, sizeof(his_host), NULL, 0, NI_NOFQDN);
 163                 break;
 164         }
 165         }
 166         printf("%s", his_host);
 167 }
 168
 169 void
 170 print_host(struct pf_addr *addr, u_int16_t port, sa_family_t af, int opts)
 171 {
 172         if (opts & PF_OPT_USEDNS)
 173                 print_name(addr, af);
 174         else {
 175                 struct pf_addr_wrap aw;
 176
 177                 memset(&aw, 0, sizeof(aw));
 178                 aw.v.a.addr = *addr;
 179                 if (af == AF_INET)
 180                         aw.v.a.mask.addr32[0] = 0xffffffff;
 181                 else {
 182                         memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
 183                         af = AF_INET6;
 184                 }
 185                 print_addr(&aw, af, opts & PF_OPT_VERBOSE2);
 186         }
 187
 188         if (port) {
 189                 if (af == AF_INET)
 190                         printf(":%u", ntohs(port));
 191                 else
 192                         printf("[%u]", ntohs(port));
 193         }
 194 }
 195
 196 void
 197 print_seq(struct pfsync_state_peer *p)
 198 {
 199         if (p->seqdiff)
 200                 printf("[%u + %u](+%u)", ntohl(p->seqlo),
 201                     ntohl(p->seqhi) - ntohl(p->seqlo), ntohl(p->seqdiff));
 202         else
 203                 printf("[%u + %u]", ntohl(p->seqlo),
 204                     ntohl(p->seqhi) - ntohl(p->seqlo));
 205 }
 206
 207 void
 208 print_state(struct pfsync_state *s, int opts)
 209 {
 210         struct pfsync_state_peer *src, *dst;
 211         struct pfsync_state_key *sk, *nk;
 212         struct protoent *p;
 213         int min, sec;
 214
 215         if (s->direction == PF_OUT) {
 216                 src = &s->src;
 217                 dst = &s->dst;
 218                 sk = &s->key[PF_SK_STACK];
 219                 nk = &s->key[PF_SK_WIRE];
 220                 if (s->proto == IPPROTO_ICMP || s->proto == IPPROTO_ICMPV6)
 221                         sk->port[0] = nk->port[0];
 222         } else {
 223                 src = &s->dst;
 224                 dst = &s->src;
 225                 sk = &s->key[PF_SK_WIRE];
 226                 nk = &s->key[PF_SK_STACK];
 227                 if (s->proto == IPPROTO_ICMP || s->proto == IPPROTO_ICMPV6)
 228                         sk->port[1] = nk->port[1];
 229         }
 230         printf("%s ", s->ifname);
 231         if ((p = getprotobynumber(s->proto)) != NULL)
 232                 printf("%s ", p->p_name);
 233         else
 234                 printf("%u ", s->proto);
 235
 236         print_host(&nk->addr[1], nk->port[1], s->af, opts);
 237         if (PF_ANEQ(&nk->addr[1], &sk->addr[1], s->af) ||
 238             nk->port[1] != sk->port[1]) {
 239                 printf(" (");
 240                 print_host(&sk->addr[1], sk->port[1], s->af, opts);
 241                 printf(")");
 242         }
 243         if (s->direction == PF_OUT)
 244                 printf(" -> ");
 245         else
 246                 printf(" <- ");
 247         print_host(&nk->addr[0], nk->port[0], s->af, opts);
 248         if (PF_ANEQ(&nk->addr[0], &sk->addr[0], s->af) ||
 249             nk->port[0] != sk->port[0]) {
 250                 printf(" (");
 251                 print_host(&sk->addr[0], sk->port[0], s->af, opts);
 252                 printf(")");
 253         }
 254
 255         printf("    ");
 256         if (s->proto == IPPROTO_TCP) {
 257                 if (src->state <= TCPS_TIME_WAIT &&
 258                     dst->state <= TCPS_TIME_WAIT)
 259                         printf("   %s:%s\n", tcpstates[src->state],
 260                             tcpstates[dst->state]);
 261                 else if (src->state == PF_TCPS_PROXY_SRC ||
 262                     dst->state == PF_TCPS_PROXY_SRC)
 263                         printf("   PROXY:SRC\n");
 264                 else if (src->state == PF_TCPS_PROXY_DST ||
 265                     dst->state == PF_TCPS_PROXY_DST)
 266                         printf("   PROXY:DST\n");
 267                 else
 268                         printf("   <BAD STATE LEVELS %u:%u>\n",
 269                             src->state, dst->state);
 270                 if (opts & PF_OPT_VERBOSE) {
 271                         printf("   ");
 272                         print_seq(src);
 273                         if (src->wscale && dst->wscale)
 274                                 printf(" wscale %u",
 275                                     src->wscale & PF_WSCALE_MASK);
 276                         printf("  ");
 277                         print_seq(dst);
 278                         if (src->wscale && dst->wscale)
 279                                 printf(" wscale %u",
 280                                     dst->wscale & PF_WSCALE_MASK);
 281                         printf("\n");
 282                 }
 283         } else if (s->proto == IPPROTO_UDP && src->state < PFUDPS_NSTATES &&
 284             dst->state < PFUDPS_NSTATES) {
 285                 const char *states[] = PFUDPS_NAMES;
 286
 287                 printf("   %s:%s\n", states[src->state], states[dst->state]);
 288         } else if (s->proto != IPPROTO_ICMP && src->state < PFOTHERS_NSTATES &&
 289             dst->state < PFOTHERS_NSTATES) {
 290                 /* XXX ICMP doesn't really have state levels */
 291                 const char *states[] = PFOTHERS_NAMES;
 292
 293                 printf("   %s:%s\n", states[src->state], states[dst->state]);
 294         } else {
 295                 printf("   %u:%u\n", src->state, dst->state);
 296         }
 297
 298         if (opts & PF_OPT_VERBOSE) {
 299                 u_int64_t packets[2];
 300                 u_int64_t bytes[2];
 301                 u_int32_t creation = ntohl(s->creation);
 302                 u_int32_t expire = ntohl(s->expire);
 303
 304                 printf("   rule %u", ntohl(s->rule));
 305                 if (ntohl(s->anchor) != -1)
 306                         printf(", anchor %u", ntohl(s->anchor));
 307                 printf(", flags:");
 308                 if (s->state_flags & PFSTATE_SLOPPY)
 309                         printf(" sloppy");
 310                 if (s->sync_flags & PFSYNC_FLAG_SRCNODE)
 311                         printf(" source-track");
 312                 if (s->sync_flags & PFSYNC_FLAG_NATSRCNODE)
 313                         printf(" sticky-address");
 314                 printf("\n");
 315
 316                 sec = creation % 60;
 317                 creation /= 60;
 318                 min = creation % 60;
 319                 creation /= 60;
 320                 printf("   age %.2u:%.2u:%.2u", creation, min, sec);
 321                 sec = expire % 60;
 322                 expire /= 60;
 323                 min = expire % 60;
 324                 expire /= 60;
 325                 printf(", expires in %.2u:%.2u:%.2u", expire, min, sec);
 326
 327                 bcopy(s->packets[0], &packets[0], sizeof(u_int64_t));
 328                 bcopy(s->packets[1], &packets[1], sizeof(u_int64_t));
 329                 bcopy(s->bytes[0], &bytes[0], sizeof(u_int64_t));
 330                 bcopy(s->bytes[1], &bytes[1], sizeof(u_int64_t));
 331                 printf(", %" PRIu64 ":%" PRIu64 " pkts, %" PRIu64 ":%"
 332                        PRIu64 " bytes\n",
 333                     be64toh(packets[0]),
 334                     be64toh(packets[1]),
 335                     be64toh(bytes[0]),
 336                     be64toh(bytes[1]));
 337         }
 338         if (opts & PF_OPT_VERBOSE2) {
 339                 u_int64_t id;
 340
 341                 bcopy(&s->id, &id, sizeof(u_int64_t));
 342                 printf("   id: %016jx creatorid: %08x",
 343                     be64toh(id),  ntohl(s->creatorid));
 344                 printf("\n");
 345         }
 346 }
 347
 348 int
 349 unmask(struct pf_addr *m, sa_family_t af __unused)
 350 {
 351         int i = 31, j = 0, b = 0;
 352         u_int32_t tmp;
 353
 354         while (j < 4 && m->addr32[j] == 0xffffffff) {
 355                 b += 32;
 356                 j++;
 357         }
 358         if (j < 4) {
 359                 tmp = ntohl(m->addr32[j]);
 360                 for (i = 31; tmp & (1 << i); --i)
 361                         b++;
 362         }
 363         return (b);
 364 }