1 /* 2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * Name to id translation routines used by the scanner. 22 * These functions are not time critical. 23 */ 24 25 #ifndef lint 26 static const char rcsid[] _U_ = 27 "@(#) $Header: /tcpdump/master/libpcap/nametoaddr.c,v 1.83 2008-02-06 10:21:30 guy Exp $ (LBL)"; 28 #endif 29 30 #ifdef HAVE_CONFIG_H 31 #include "config.h" 32 #endif 33 34 #ifdef DECNETLIB 35 #include <sys/types.h> 36 #include <netdnet/dnetdb.h> 37 #endif 38 39 #ifdef WIN32 40 #include <pcap-stdinc.h> 41 42 #else /* WIN32 */ 43 44 #include <sys/param.h> 45 #include <sys/types.h> /* concession to AIX */ 46 #include <sys/socket.h> 47 #include <sys/time.h> 48 49 #include <netinet/in.h> 50 #endif /* WIN32 */ 51 52 #ifndef WIN32 53 #ifdef HAVE_ETHER_HOSTTON 54 /* 55 * XXX - do we need any of this if <netinet/if_ether.h> doesn't declare 56 * ether_hostton()? 57 */ 58 #ifdef HAVE_NETINET_IF_ETHER_H 59 struct mbuf; /* Squelch compiler warnings on some platforms for */ 60 struct rtentry; /* declarations in <net/if.h> */ 61 #include <net/if.h> /* for "struct ifnet" in "struct arpcom" on Solaris */ 62 #include <netinet/if_ether.h> 63 #endif /* HAVE_NETINET_IF_ETHER_H */ 64 #ifdef NETINET_ETHER_H_DECLARES_ETHER_HOSTTON 65 #include <netinet/ether.h> 66 #endif /* NETINET_ETHER_H_DECLARES_ETHER_HOSTTON */ 67 #endif /* HAVE_ETHER_HOSTTON */ 68 #include <arpa/inet.h> 69 #include <netdb.h> 70 #endif /* WIN32 */ 71 72 #include <ctype.h> 73 #include <errno.h> 74 #include <stdlib.h> 75 #include <string.h> 76 #include <stdio.h> 77 78 #include "pcap-int.h" 79 80 #include "gencode.h" 81 #include <pcap/namedb.h> 82 83 #ifdef HAVE_OS_PROTO_H 84 #include "os-proto.h" 85 #endif 86 87 #ifndef NTOHL 88 #define NTOHL(x) (x) = ntohl(x) 89 #define NTOHS(x) (x) = ntohs(x) 90 #endif 91 92 static inline int xdtoi(int); 93 94 /* 95 * Convert host name to internet address. 96 * Return 0 upon failure. 97 */ 98 bpf_u_int32 ** 99 pcap_nametoaddr(const char *name) 100 { 101 #ifndef h_addr 102 static bpf_u_int32 *hlist[2]; 103 #endif 104 bpf_u_int32 **p; 105 struct hostent *hp; 106 107 if ((hp = gethostbyname(name)) != NULL) { 108 #ifndef h_addr 109 hlist[0] = (bpf_u_int32 *)hp->h_addr; 110 NTOHL(hp->h_addr); 111 return hlist; 112 #else 113 for (p = (bpf_u_int32 **)hp->h_addr_list; *p; ++p) 114 NTOHL(**p); 115 return (bpf_u_int32 **)hp->h_addr_list; 116 #endif 117 } 118 else 119 return 0; 120 } 121 122 #ifdef INET6 123 struct addrinfo * 124 pcap_nametoaddrinfo(const char *name) 125 { 126 struct addrinfo hints, *res; 127 int error; 128 129 memset(&hints, 0, sizeof(hints)); 130 hints.ai_family = PF_UNSPEC; 131 hints.ai_socktype = SOCK_STREAM; /*not really*/ 132 hints.ai_protocol = IPPROTO_TCP; /*not really*/ 133 error = getaddrinfo(name, NULL, &hints, &res); 134 if (error) 135 return NULL; 136 else 137 return res; 138 } 139 #endif /*INET6*/ 140 141 /* 142 * Convert net name to internet address. 143 * Return 0 upon failure. 144 */ 145 bpf_u_int32 146 pcap_nametonetaddr(const char *name) 147 { 148 #ifndef WIN32 149 struct netent *np; 150 151 if ((np = getnetbyname(name)) != NULL) 152 return np->n_net; 153 else 154 return 0; 155 #else 156 /* 157 * There's no "getnetbyname()" on Windows. 158 */ 159 return 0; 160 #endif 161 } 162 163 /* 164 * Convert a port name to its port and protocol numbers. 165 * We assume only TCP or UDP. 166 * Return 0 upon failure. 167 */ 168 int 169 pcap_nametoport(const char *name, int *port, int *proto) 170 { 171 struct servent *sp; 172 int tcp_port = -1; 173 int udp_port = -1; 174 175 /* 176 * We need to check /etc/services for ambiguous entries. 177 * If we find the ambiguous entry, and it has the 178 * same port number, change the proto to PROTO_UNDEF 179 * so both TCP and UDP will be checked. 180 */ 181 sp = getservbyname(name, "tcp"); 182 if (sp != NULL) tcp_port = ntohs(sp->s_port); 183 sp = getservbyname(name, "udp"); 184 if (sp != NULL) udp_port = ntohs(sp->s_port); 185 if (tcp_port >= 0) { 186 *port = tcp_port; 187 *proto = IPPROTO_TCP; 188 if (udp_port >= 0) { 189 if (udp_port == tcp_port) 190 *proto = PROTO_UNDEF; 191 #ifdef notdef 192 else 193 /* Can't handle ambiguous names that refer 194 to different port numbers. */ 195 warning("ambiguous port %s in /etc/services", 196 name); 197 #endif 198 } 199 return 1; 200 } 201 if (udp_port >= 0) { 202 *port = udp_port; 203 *proto = IPPROTO_UDP; 204 return 1; 205 } 206 #if defined(ultrix) || defined(__osf__) 207 /* Special hack in case NFS isn't in /etc/services */ 208 if (strcmp(name, "nfs") == 0) { 209 *port = 2049; 210 *proto = PROTO_UNDEF; 211 return 1; 212 } 213 #endif 214 return 0; 215 } 216 217 /* 218 * Convert a string in the form PPP-PPP, where correspond to ports, to 219 * a starting and ending port in a port range. 220 * Return 0 on failure. 221 */ 222 int 223 pcap_nametoportrange(const char *name, int *port1, int *port2, int *proto) 224 { 225 u_int p1, p2; 226 char *off, *cpy; 227 int save_proto; 228 229 if (sscanf(name, "%d-%d", &p1, &p2) != 2) { 230 if ((cpy = strdup(name)) == NULL) 231 return 0; 232 233 if ((off = strchr(cpy, '-')) == NULL) { 234 free(cpy); 235 return 0; 236 } 237 238 *off = '\0'; 239 240 if (pcap_nametoport(cpy, port1, proto) == 0) { 241 free(cpy); 242 return 0; 243 } 244 save_proto = *proto; 245 246 if (pcap_nametoport(off + 1, port2, proto) == 0) { 247 free(cpy); 248 return 0; 249 } 250 251 if (*proto != save_proto) 252 *proto = PROTO_UNDEF; 253 } else { 254 *port1 = p1; 255 *port2 = p2; 256 *proto = PROTO_UNDEF; 257 } 258 259 return 1; 260 } 261 262 int 263 pcap_nametoproto(const char *str) 264 { 265 struct protoent *p; 266 267 p = getprotobyname(str); 268 if (p != 0) 269 return p->p_proto; 270 else 271 return PROTO_UNDEF; 272 } 273 274 #include "ethertype.h" 275 276 struct eproto { 277 const char *s; 278 u_short p; 279 }; 280 281 /* Static data base of ether protocol types. */ 282 struct eproto eproto_db[] = { 283 { "pup", ETHERTYPE_PUP }, 284 { "xns", ETHERTYPE_NS }, 285 { "ip", ETHERTYPE_IP }, 286 #ifdef INET6 287 { "ip6", ETHERTYPE_IPV6 }, 288 #endif 289 { "arp", ETHERTYPE_ARP }, 290 { "rarp", ETHERTYPE_REVARP }, 291 { "sprite", ETHERTYPE_SPRITE }, 292 { "mopdl", ETHERTYPE_MOPDL }, 293 { "moprc", ETHERTYPE_MOPRC }, 294 { "decnet", ETHERTYPE_DN }, 295 { "lat", ETHERTYPE_LAT }, 296 { "sca", ETHERTYPE_SCA }, 297 { "lanbridge", ETHERTYPE_LANBRIDGE }, 298 { "vexp", ETHERTYPE_VEXP }, 299 { "vprod", ETHERTYPE_VPROD }, 300 { "atalk", ETHERTYPE_ATALK }, 301 { "atalkarp", ETHERTYPE_AARP }, 302 { "loopback", ETHERTYPE_LOOPBACK }, 303 { "decdts", ETHERTYPE_DECDTS }, 304 { "decdns", ETHERTYPE_DECDNS }, 305 { (char *)0, 0 } 306 }; 307 308 int 309 pcap_nametoeproto(const char *s) 310 { 311 struct eproto *p = eproto_db; 312 313 while (p->s != 0) { 314 if (strcmp(p->s, s) == 0) 315 return p->p; 316 p += 1; 317 } 318 return PROTO_UNDEF; 319 } 320 321 #include "llc.h" 322 323 /* Static data base of LLC values. */ 324 static struct eproto llc_db[] = { 325 { "iso", LLCSAP_ISONS }, 326 { "stp", LLCSAP_8021D }, 327 { "ipx", LLCSAP_IPX }, 328 { "netbeui", LLCSAP_NETBEUI }, 329 { (char *)0, 0 } 330 }; 331 332 int 333 pcap_nametollc(const char *s) 334 { 335 struct eproto *p = llc_db; 336 337 while (p->s != 0) { 338 if (strcmp(p->s, s) == 0) 339 return p->p; 340 p += 1; 341 } 342 return PROTO_UNDEF; 343 } 344 345 /* Hex digit to integer. */ 346 static inline int 347 xdtoi(c) 348 register int c; 349 { 350 if (isdigit(c)) 351 return c - '0'; 352 else if (islower(c)) 353 return c - 'a' + 10; 354 else 355 return c - 'A' + 10; 356 } 357 358 int 359 __pcap_atoin(const char *s, bpf_u_int32 *addr) 360 { 361 u_int n; 362 int len; 363 364 *addr = 0; 365 len = 0; 366 while (1) { 367 n = 0; 368 while (*s && *s != '.') 369 n = n * 10 + *s++ - '0'; 370 *addr <<= 8; 371 *addr |= n & 0xff; 372 len += 8; 373 if (*s == '\0') 374 return len; 375 ++s; 376 } 377 /* NOTREACHED */ 378 } 379 380 int 381 __pcap_atodn(const char *s, bpf_u_int32 *addr) 382 { 383 #define AREASHIFT 10 384 #define AREAMASK 0176000 385 #define NODEMASK 01777 386 387 u_int node, area; 388 389 if (sscanf(s, "%d.%d", &area, &node) != 2) 390 bpf_error("malformed decnet address '%s'", s); 391 392 *addr = (area << AREASHIFT) & AREAMASK; 393 *addr |= (node & NODEMASK); 394 395 return(32); 396 } 397 398 /* 399 * Convert 's', which can have the one of the forms: 400 * 401 * "xx:xx:xx:xx:xx:xx" 402 * "xx.xx.xx.xx.xx.xx" 403 * "xx-xx-xx-xx-xx-xx" 404 * "xxxx.xxxx.xxxx" 405 * "xxxxxxxxxxxx" 406 * 407 * (or various mixes of ':', '.', and '-') into a new 408 * ethernet address. Assumes 's' is well formed. 409 */ 410 u_char * 411 pcap_ether_aton(const char *s) 412 { 413 register u_char *ep, *e; 414 register u_int d; 415 416 e = ep = (u_char *)malloc(6); 417 418 while (*s) { 419 if (*s == ':' || *s == '.' || *s == '-') 420 s += 1; 421 d = xdtoi(*s++); 422 if (isxdigit((unsigned char)*s)) { 423 d <<= 4; 424 d |= xdtoi(*s++); 425 } 426 *ep++ = d; 427 } 428 429 return (e); 430 } 431 432 #ifndef HAVE_ETHER_HOSTTON 433 /* Roll our own */ 434 u_char * 435 pcap_ether_hostton(const char *name) 436 { 437 register struct pcap_etherent *ep; 438 register u_char *ap; 439 static FILE *fp = NULL; 440 static int init = 0; 441 442 if (!init) { 443 fp = fopen(PCAP_ETHERS_FILE, "r"); 444 ++init; 445 if (fp == NULL) 446 return (NULL); 447 } else if (fp == NULL) 448 return (NULL); 449 else 450 rewind(fp); 451 452 while ((ep = pcap_next_etherent(fp)) != NULL) { 453 if (strcmp(ep->name, name) == 0) { 454 ap = (u_char *)malloc(6); 455 if (ap != NULL) { 456 memcpy(ap, ep->addr, 6); 457 return (ap); 458 } 459 break; 460 } 461 } 462 return (NULL); 463 } 464 #else 465 466 #if !defined(HAVE_DECL_ETHER_HOSTTON) || !HAVE_DECL_ETHER_HOSTTON 467 #ifndef HAVE_STRUCT_ETHER_ADDR 468 struct ether_addr { 469 unsigned char ether_addr_octet[6]; 470 }; 471 #endif 472 extern int ether_hostton(const char *, struct ether_addr *); 473 #endif 474 475 /* Use the os supplied routines */ 476 u_char * 477 pcap_ether_hostton(const char *name) 478 { 479 register u_char *ap; 480 u_char a[6]; 481 482 ap = NULL; 483 if (ether_hostton(name, (struct ether_addr *)a) == 0) { 484 ap = (u_char *)malloc(6); 485 if (ap != NULL) 486 memcpy((char *)ap, (char *)a, 6); 487 } 488 return (ap); 489 } 490 #endif 491 492 u_short 493 __pcap_nametodnaddr(const char *name) 494 { 495 #ifdef DECNETLIB 496 struct nodeent *getnodebyname(); 497 struct nodeent *nep; 498 unsigned short res; 499 500 nep = getnodebyname(name); 501 if (nep == ((struct nodeent *)0)) 502 bpf_error("unknown decnet host name '%s'\n", name); 503 504 memcpy((char *)&res, (char *)nep->n_addr, sizeof(unsigned short)); 505 return(res); 506 #else 507 bpf_error("decnet name support not included, '%s' cannot be translated\n", 508 name); 509 return(0); 510 #endif 511 } 512