contrib/ipfilter/printnat.c

   1 /*
   2  * Copyright (C) 1993-2001 by Darren Reed.
   3  *
   4  * See the IPFILTER.LICENCE file for details on licencing.
   5  *
   6  * Added redirect stuff and a variety of bug fixes. (mcn@EnGarde.com)
   7  */
   8 #if defined(__sgi) && (IRIX > 602)
   9 # include <sys/ptimers.h>
  10 #endif
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <fcntl.h>
  14 #include <errno.h>
  15 #include <sys/types.h>
  16 #if !defined(__SVR4) && !defined(__svr4__)
  17 #include <strings.h>
  18 #else
  19 #include <sys/byteorder.h>
  20 #endif
  21 #include <sys/time.h>
  22 #include <sys/param.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <stddef.h>
  26 #include <sys/socket.h>
  27 #include <sys/ioctl.h>
  28 #if defined(sun) && (defined(__svr4__) || defined(__SVR4))
  29 # include <sys/ioccom.h>
  30 # include <sys/sysmacros.h>
  31 #endif
  32 #include <netinet/in.h>
  33 #include <netinet/in_systm.h>
  34 #include <netinet/ip.h>
  35 #include <netinet/tcp.h>
  36 #include <net/if.h>
  37 #if __FreeBSD_version >= 300000
  38 # include <net/if_var.h>
  39 #endif
  40 #include <netdb.h>
  41 #include <arpa/nameser.h>
  42 #include <arpa/inet.h>
  43 #include <resolv.h>
  44 #include <ctype.h>
  45 #include "netinet/ip_compat.h"
  46 #include "netinet/ip_fil.h"
  47 #include "netinet/ip_nat.h"
  48 #include "netinet/ip_state.h"
  49 #include "netinet/ip_proxy.h"
  50 #include "ipf.h"
  51 #include "kmem.h"
  52
  53 #if     defined(sun) && !SOLARIS2
  54 # define        STRERROR(x)     sys_errlist[x]
  55 extern  char    *sys_errlist[];
  56 #else
  57 # define        STRERROR(x)     strerror(x)
  58 #endif
  59
  60 #if !defined(lint)
  61 static const char rcsid[] = "@(#)$Id: printnat.c,v 1.1.2.15 2003/03/22 15:31:49 darrenr Exp $";
  62 #endif
  63
  64
  65 #if     SOLARIS
  66 #define bzero(a,b)      memset(a,0,b)
  67 #endif
  68 #ifdef  USE_INET6
  69 extern  int     use_inet6;
  70 #endif
  71
  72 extern  char    thishost[MAXHOSTNAMELEN];
  73
  74 extern  int     countbits __P((u_32_t));
  75
  76 void    printnat __P((ipnat_t *, int));
  77 char    *getnattype __P((ipnat_t *));
  78 void    printactivenat __P((nat_t *, int));
  79 void    printhostmap __P((hostmap_t *, u_int));
  80 char    *getsumd __P((u_32_t));
  81
  82 static void     printaps __P((ap_session_t *, int));
  83
  84 static void printaps(aps, opts)
  85 ap_session_t *aps;
  86 int opts;
  87 {
  88         ipsec_pxy_t ipsec;
  89         ap_session_t ap;
  90         ftpinfo_t ftp;
  91         aproxy_t apr;
  92         raudio_t ra;
  93
  94         if (kmemcpy((char *)&ap, (long)aps, sizeof(ap)))
  95                 return;
  96         if (kmemcpy((char *)&apr, (long)ap.aps_apr, sizeof(apr)))
  97                 return;
  98         printf("\tproxy %s/%d use %d flags %x\n", apr.apr_label,
  99                 apr.apr_p, apr.apr_ref, apr.apr_flags);
 100         printf("\t\tproto %d flags %#x bytes ", ap.aps_p, ap.aps_flags);
 101 #ifdef  USE_QUAD_T
 102         printf("%qu pkts %qu", (unsigned long long)ap.aps_bytes,
 103                 (unsigned long long)ap.aps_pkts);
 104 #else
 105         printf("%lu pkts %lu", ap.aps_bytes, ap.aps_pkts);
 106 #endif
 107         printf(" data %s size %d\n", ap.aps_data ? "YES" : "NO", ap.aps_psiz);
 108         if ((ap.aps_p == IPPROTO_TCP) && (opts & OPT_VERBOSE)) {
 109                 printf("\t\tstate[%u,%u], sel[%d,%d]\n",
 110                         ap.aps_state[0], ap.aps_state[1],
 111                         ap.aps_sel[0], ap.aps_sel[1]);
 112 #if (defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011)) || \
 113     (__FreeBSD_version >= 300000) || defined(OpenBSD)
 114                 printf("\t\tseq: off %hd/%hd min %x/%x\n",
 115                         ap.aps_seqoff[0], ap.aps_seqoff[1],
 116                         ap.aps_seqmin[0], ap.aps_seqmin[1]);
 117                 printf("\t\tack: off %hd/%hd min %x/%x\n",
 118                         ap.aps_ackoff[0], ap.aps_ackoff[1],
 119                         ap.aps_ackmin[0], ap.aps_ackmin[1]);
 120 #else
 121                 printf("\t\tseq: off %hd/%hd min %lx/%lx\n",
 122                         ap.aps_seqoff[0], ap.aps_seqoff[1],
 123                         ap.aps_seqmin[0], ap.aps_seqmin[1]);
 124                 printf("\t\tack: off %hd/%hd min %lx/%lx\n",
 125                         ap.aps_ackoff[0], ap.aps_ackoff[1],
 126                         ap.aps_ackmin[0], ap.aps_ackmin[1]);
 127 #endif
 128         }
 129
 130         if (!strcmp(apr.apr_label, "raudio") && ap.aps_psiz == sizeof(ra)) {
 131                 if (kmemcpy((char *)&ra, (long)ap.aps_data, sizeof(ra)))
 132                         return;
 133                 printf("\tReal Audio Proxy:\n");
 134                 printf("\t\tSeen PNA: %d\tVersion: %d\tEOS: %d\n",
 135                         ra.rap_seenpna, ra.rap_version, ra.rap_eos);
 136                 printf("\t\tMode: %#x\tSBF: %#x\n", ra.rap_mode, ra.rap_sbf);
 137                 printf("\t\tPorts:pl %hu, pr %hu, sr %hu\n",
 138                         ra.rap_plport, ra.rap_prport, ra.rap_srport);
 139         } else if (!strcmp(apr.apr_label, "ftp") &&
 140                    (ap.aps_psiz == sizeof(ftp))) {
 141                 if (kmemcpy((char *)&ftp, (long)ap.aps_data, sizeof(ftp)))
 142                         return;
 143                 printf("\tFTP Proxy:\n");
 144                 printf("\t\tpassok: %d\n", ftp.ftp_passok);
 145                 ftp.ftp_side[0].ftps_buf[FTP_BUFSZ - 1] = '\0';
 146                 ftp.ftp_side[1].ftps_buf[FTP_BUFSZ - 1] = '\0';
 147                 printf("\tClient:\n");
 148                 printf("\t\tseq %08x%08x len %d junk %d cmds %d\n",
 149                         ftp.ftp_side[0].ftps_seq[1],
 150                         ftp.ftp_side[0].ftps_seq[0],
 151                         ftp.ftp_side[0].ftps_len,
 152                         ftp.ftp_side[0].ftps_junk, ftp.ftp_side[0].ftps_cmds);
 153                 printf("\t\tbuf [");
 154                 printbuf(ftp.ftp_side[0].ftps_buf, FTP_BUFSZ, 1);
 155                 printf("]\n\tServer:\n");
 156                 printf("\t\tseq %08x%08x len %d junk %d cmds %d\n",
 157                         ftp.ftp_side[1].ftps_seq[1],
 158                         ftp.ftp_side[1].ftps_seq[0],
 159                         ftp.ftp_side[1].ftps_len,
 160                         ftp.ftp_side[1].ftps_junk, ftp.ftp_side[1].ftps_cmds);
 161                 printf("\t\tbuf [");
 162                 printbuf(ftp.ftp_side[1].ftps_buf, FTP_BUFSZ, 1);
 163                 printf("]\n");
 164         } else if (!strcmp(apr.apr_label, "ipsec") &&
 165                    (ap.aps_psiz == sizeof(ipsec))) {
 166                 if (kmemcpy((char *)&ipsec, (long)ap.aps_data, sizeof(ipsec)))
 167                         return;
 168                 printf("\tIPSec Proxy:\n");
 169                 printf("\t\tICookie %08x%08x RCookie %08x%08x %s\n",
 170                         (u_int)ntohl(ipsec.ipsc_icookie[0]),
 171                         (u_int)ntohl(ipsec.ipsc_icookie[1]),
 172                         (u_int)ntohl(ipsec.ipsc_rcookie[0]),
 173                         (u_int)ntohl(ipsec.ipsc_rcookie[1]),
 174                         ipsec.ipsc_rckset ? "(Set)" : "(Not set)");
 175         }
 176 }
 177
 178
 179 /*
 180  * Get a nat filter type given its kernel address.
 181  */
 182 char *getnattype(ipnat)
 183 ipnat_t *ipnat;
 184 {
 185         static char unknownbuf[20];
 186         ipnat_t ipnatbuff;
 187         char *which;
 188
 189         if (!ipnat || (ipnat && kmemcpy((char *)&ipnatbuff, (long)ipnat,
 190                                         sizeof(ipnatbuff))))
 191                 return "???";
 192
 193         switch (ipnatbuff.in_redir)
 194         {
 195         case NAT_MAP :
 196                 which = "MAP";
 197                 break;
 198         case NAT_MAPBLK :
 199                 which = "MAP-BLOCK";
 200                 break;
 201         case NAT_REDIRECT :
 202                 which = "RDR";
 203                 break;
 204         case NAT_BIMAP :
 205                 which = "BIMAP";
 206                 break;
 207         default :
 208                 sprintf(unknownbuf, "unknown(%04x)",
 209                         ipnatbuff.in_redir & 0xffffffff);
 210                 which = unknownbuf;
 211                 break;
 212         }
 213         return which;
 214 }
 215
 216
 217 void printactivenat(nat, opts)
 218 nat_t *nat;
 219 int opts;
 220 {
 221         u_int hv1, hv2;
 222
 223         printf("%s %-15s", getnattype(nat->nat_ptr), inet_ntoa(nat->nat_inip));
 224
 225         if ((nat->nat_flags & IPN_TCPUDP) != 0)
 226                 printf(" %-5hu", ntohs(nat->nat_inport));
 227
 228         printf(" <- -> %-15s",inet_ntoa(nat->nat_outip));
 229
 230         if ((nat->nat_flags & IPN_TCPUDP) != 0)
 231                 printf(" %-5hu", ntohs(nat->nat_outport));
 232
 233         printf(" [%s", inet_ntoa(nat->nat_oip));
 234         if ((nat->nat_flags & IPN_TCPUDP) != 0)
 235                 printf(" %hu", ntohs(nat->nat_oport));
 236         printf("]");
 237
 238         if (opts & OPT_VERBOSE) {
 239                 printf("\n\tage %lu use %hu sumd %s/",
 240                         nat->nat_age, nat->nat_use, getsumd(nat->nat_sumd[0]));
 241                 hv1 = NAT_HASH_FN(nat->nat_inip.s_addr, nat->nat_inport,
 242                                   0xffffffff),
 243                 hv1 = NAT_HASH_FN(nat->nat_oip.s_addr, hv1 + nat->nat_oport,
 244                                   NAT_TABLE_SZ),
 245                 hv2 = NAT_HASH_FN(nat->nat_outip.s_addr, nat->nat_outport,
 246                                   0xffffffff),
 247                 hv2 = NAT_HASH_FN(nat->nat_oip.s_addr, hv2 + nat->nat_oport,
 248                                   NAT_TABLE_SZ),
 249                 printf("%s pr %u bkt %d/%d flags %x drop %d/%d\n",
 250                         getsumd(nat->nat_sumd[1]), nat->nat_p,
 251                         hv1, hv2, nat->nat_flags,
 252                         nat->nat_drop[0], nat->nat_drop[1]);
 253                 printf("\tifp %s ", getifname(nat->nat_ifp));
 254 #ifdef  USE_QUAD_T
 255                 printf("bytes %qu pkts %qu",
 256                         (unsigned long long)nat->nat_bytes,
 257                         (unsigned long long)nat->nat_pkts);
 258 #else
 259                 printf("bytes %lu pkts %lu", nat->nat_bytes, nat->nat_pkts);
 260 #endif
 261 #if SOLARIS
 262                 printf(" %lx", nat->nat_ipsumd);
 263 #endif
 264         }
 265
 266         putchar('\n');
 267         if (nat->nat_aps)
 268                 printaps(nat->nat_aps, opts);
 269 }
 270
 271
 272 void printhostmap(hmp, hv)
 273 hostmap_t *hmp;
 274 u_int hv;
 275 {
 276         printf("%s -> ", inet_ntoa(hmp->hm_realip));
 277         printf("%s ", inet_ntoa(hmp->hm_mapip));
 278         printf("(use = %d hv = %u)\n", hmp->hm_ref, hv);
 279 }
 280
 281
 282 char *getsumd(sum)
 283 u_32_t sum;
 284 {
 285         static char sumdbuf[17];
 286
 287         if (sum & NAT_HW_CKSUM)
 288                 sprintf(sumdbuf, "hw(%#0x)", sum & 0xffff);
 289         else
 290                 sprintf(sumdbuf, "%#0x", sum);
 291         return sumdbuf;
 292 }
 293
 294
 295 /*
 296  * Print out a NAT rule
 297  */
 298 void printnat(np, opts)
 299 ipnat_t *np;
 300 int opts;
 301 {
 302         struct  protoent        *pr;
 303         struct  servent *sv;
 304         int     bits;
 305
 306         pr = getprotobynumber(np->in_p);
 307
 308         switch (np->in_redir)
 309         {
 310         case NAT_REDIRECT :
 311                 printf("rdr");
 312                 break;
 313         case NAT_MAP :
 314                 printf("map");
 315                 break;
 316         case NAT_MAPBLK :
 317                 printf("map-block");
 318                 break;
 319         case NAT_BIMAP :
 320                 printf("bimap");
 321                 break;
 322         default :
 323                 fprintf(stderr, "unknown value for in_redir: %#x\n",
 324                         np->in_redir);
 325                 break;
 326         }
 327
 328         printf(" %s ", np->in_ifname);
 329
 330         if (np->in_flags & IPN_FILTER) {
 331                 if (np->in_flags & IPN_NOTSRC)
 332                         printf("! ");
 333                 printf("from ");
 334                 if (np->in_redir == NAT_REDIRECT) {
 335                         printhostmask(4, (u_32_t *)&np->in_srcip,
 336                                       (u_32_t *)&np->in_srcmsk);
 337                 } else {
 338                         printhostmask(4, (u_32_t *)&np->in_inip,
 339                                       (u_32_t *)&np->in_inmsk);
 340                 }
 341                 if (np->in_scmp)
 342                         printportcmp(np->in_p, &np->in_tuc.ftu_src);
 343
 344                 if (np->in_flags & IPN_NOTDST)
 345                         printf(" !");
 346                 printf(" to ");
 347                 if (np->in_redir == NAT_REDIRECT) {
 348                         printhostmask(4, (u_32_t *)&np->in_outip,
 349                                       (u_32_t *)&np->in_outmsk);
 350                 } else {
 351                         printhostmask(4, (u_32_t *)&np->in_srcip,
 352                                       (u_32_t *)&np->in_srcmsk);
 353                 }
 354                 if (np->in_dcmp)
 355                         printportcmp(np->in_p, &np->in_tuc.ftu_dst);
 356         }
 357
 358         if (np->in_redir == NAT_REDIRECT) {
 359                 if (!(np->in_flags & IPN_FILTER)) {
 360                         printf("%s", inet_ntoa(np->in_out[0]));
 361                         bits = countbits(np->in_out[1].s_addr);
 362                         if (bits != -1)
 363                                 printf("/%d ", bits);
 364                         else
 365                                 printf("/%s ", inet_ntoa(np->in_out[1]));
 366                         printf("port %d", ntohs(np->in_pmin));
 367                         if (np->in_pmax != np->in_pmin)
 368                                 printf("- %d", ntohs(np->in_pmax));
 369                 }
 370                 printf(" -> %s", inet_ntoa(np->in_in[0]));
 371                 if (np->in_flags & IPN_SPLIT)
 372                         printf(",%s", inet_ntoa(np->in_in[1]));
 373                 printf(" port %d", ntohs(np->in_pnext));
 374                 if ((np->in_flags & IPN_TCPUDP) == IPN_TCPUDP)
 375                         printf(" tcp/udp");
 376                 else if ((np->in_flags & IPN_TCP) == IPN_TCP)
 377                         printf(" tcp");
 378                 else if ((np->in_flags & IPN_UDP) == IPN_UDP)
 379                         printf(" udp");
 380                 else if (np->in_p == 0)
 381                         printf(" ip");
 382                 else if (np->in_p != 0) {
 383                         if (pr != NULL)
 384                                 printf(" %s", pr->p_name);
 385                         else
 386                                 printf(" %d", np->in_p);
 387                 }
 388                 if (np->in_flags & IPN_ROUNDR)
 389                         printf(" round-robin");
 390                 if (np->in_flags & IPN_FRAG)
 391                         printf(" frag");
 392                 if (np->in_age[0])
 393                         printf(" age %d/%d", np->in_age[0], np->in_age[1]);
 394                 if (np->in_mssclamp)
 395                         printf(" mssclamp %u", np->in_mssclamp);
 396                 printf("\n");
 397                 if (opts & OPT_DEBUG)
 398                         printf("\tspc %lu flg %#x max %u use %d\n",
 399                                np->in_space, np->in_flags,
 400                                np->in_pmax, np->in_use);
 401         } else {
 402                 if (!(np->in_flags & IPN_FILTER)) {
 403                         printf("%s/", inet_ntoa(np->in_in[0]));
 404                         bits = countbits(np->in_in[1].s_addr);
 405                         if (bits != -1)
 406                                 printf("%d", bits);
 407                         else
 408                                 printf("%s", inet_ntoa(np->in_in[1]));
 409                 }
 410                 printf(" -> ");
 411                 if (np->in_flags & IPN_IPRANGE) {
 412                         printf("range %s-", inet_ntoa(np->in_out[0]));
 413                         printf("%s", inet_ntoa(np->in_out[1]));
 414                 } else {
 415                         printf("%s/", inet_ntoa(np->in_out[0]));
 416                         bits = countbits(np->in_out[1].s_addr);
 417                         if (bits != -1)
 418                                 printf("%d", bits);
 419                         else
 420                                 printf("%s", inet_ntoa(np->in_out[1]));
 421                 }
 422                 if (*np->in_plabel) {
 423                         printf(" proxy port");
 424                         if (np->in_dcmp != 0)
 425                                 np->in_dport = htons(np->in_dport);
 426                         if (np->in_dport != 0) {
 427                                 if (pr != NULL)
 428                                         sv = getservbyport(np->in_dport,
 429                                                            pr->p_name);
 430                                 else
 431                                         sv = getservbyport(np->in_dport, NULL);
 432                                 if (sv != NULL)
 433                                         printf(" %s", sv->s_name);
 434                                 else
 435                                         printf(" %hu", ntohs(np->in_dport));
 436                         }
 437                         printf(" %.*s/", (int)sizeof(np->in_plabel),
 438                                 np->in_plabel);
 439                         if (pr != NULL)
 440                                 fputs(pr->p_name, stdout);
 441                         else
 442                                 printf("%d", np->in_p);
 443                 } else if (np->in_redir == NAT_MAPBLK) {
 444                         if ((np->in_pmin == 0) &&
 445                             (np->in_flags & IPN_AUTOPORTMAP))
 446                                 printf(" ports auto");
 447                         else
 448                                 printf(" ports %d", np->in_pmin);
 449                         if (opts & OPT_DEBUG)
 450                                 printf("\n\tip modulous %d", np->in_pmax);
 451                 } else if (np->in_pmin || np->in_pmax) {
 452                         printf(" portmap");
 453                         if ((np->in_flags & IPN_TCPUDP) == IPN_TCPUDP)
 454                                 printf(" tcp/udp");
 455                         else if (np->in_flags & IPN_TCP)
 456                                 printf(" tcp");
 457                         else if (np->in_flags & IPN_UDP)
 458                                 printf(" udp");
 459                         if (np->in_flags & IPN_AUTOPORTMAP) {
 460                                 printf(" auto");
 461                                 if (opts & OPT_DEBUG)
 462                                         printf(" [%d:%d %d %d]",
 463                                                ntohs(np->in_pmin),
 464                                                ntohs(np->in_pmax),
 465                                                np->in_ippip, np->in_ppip);
 466                         } else {
 467                                 printf(" %d:%d", ntohs(np->in_pmin),
 468                                        ntohs(np->in_pmax));
 469                         }
 470                 }
 471                 if (np->in_flags & IPN_FRAG)
 472                         printf(" frag");
 473                 if (np->in_age[0])
 474                         printf(" age %d/%d", np->in_age[0], np->in_age[1]);
 475                 printf("\n");
 476                 if (opts & OPT_DEBUG) {
 477                         struct in_addr nip;
 478
 479                         nip.s_addr = htonl(np->in_nextip.s_addr);
 480
 481                         printf("\tspace %lu nextip %s pnext %d", np->in_space,
 482                                inet_ntoa(nip), np->in_pnext);
 483                         printf(" flags %x use %u\n",
 484                                np->in_flags, np->in_use);
 485                 }
 486         }
 487 }