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 26static 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 59struct mbuf; /* Squelch compiler warnings on some platforms for */ 60struct 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 92static inline int xdtoi(int); 93 94/* 95 * Convert host name to internet address. 96 * Return 0 upon failure. 97 */ 98bpf_u_int32 ** 99pcap_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 123struct addrinfo * 124pcap_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 */ 145bpf_u_int32 146pcap_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 */ 168int 169pcap_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 */ 222int 223pcap_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 free(cpy); 251 252 if (*proto != save_proto) 253 *proto = PROTO_UNDEF; 254 } else { 255 *port1 = p1; 256 *port2 = p2; 257 *proto = PROTO_UNDEF; 258 } 259 260 return 1; 261} 262 263int 264pcap_nametoproto(const char *str) 265{ 266 struct protoent *p; 267 268 p = getprotobyname(str); 269 if (p != 0) 270 return p->p_proto; 271 else 272 return PROTO_UNDEF; 273} 274 275#include "ethertype.h" 276 277struct eproto { 278 const char *s; 279 u_short p; 280}; 281 282/* Static data base of ether protocol types. */ 283struct eproto eproto_db[] = { 284 { "pup", ETHERTYPE_PUP }, 285 { "xns", ETHERTYPE_NS }, 286 { "ip", ETHERTYPE_IP }, 287#ifdef INET6 288 { "ip6", ETHERTYPE_IPV6 }, 289#endif 290 { "arp", ETHERTYPE_ARP }, 291 { "rarp", ETHERTYPE_REVARP }, 292 { "sprite", ETHERTYPE_SPRITE }, 293 { "mopdl", ETHERTYPE_MOPDL }, 294 { "moprc", ETHERTYPE_MOPRC }, 295 { "decnet", ETHERTYPE_DN }, 296 { "lat", ETHERTYPE_LAT }, 297 { "sca", ETHERTYPE_SCA }, 298 { "lanbridge", ETHERTYPE_LANBRIDGE }, 299 { "vexp", ETHERTYPE_VEXP }, 300 { "vprod", ETHERTYPE_VPROD }, 301 { "atalk", ETHERTYPE_ATALK }, 302 { "atalkarp", ETHERTYPE_AARP }, 303 { "loopback", ETHERTYPE_LOOPBACK }, 304 { "decdts", ETHERTYPE_DECDTS }, 305 { "decdns", ETHERTYPE_DECDNS }, 306 { (char *)0, 0 } 307}; 308 309int 310pcap_nametoeproto(const char *s) 311{ 312 struct eproto *p = eproto_db; 313 314 while (p->s != 0) { 315 if (strcmp(p->s, s) == 0) 316 return p->p; 317 p += 1; 318 } 319 return PROTO_UNDEF; 320} 321 322#include "llc.h" 323 324/* Static data base of LLC values. */ 325static struct eproto llc_db[] = { 326 { "iso", LLCSAP_ISONS }, 327 { "stp", LLCSAP_8021D }, 328 { "ipx", LLCSAP_IPX }, 329 { "netbeui", LLCSAP_NETBEUI }, 330 { (char *)0, 0 } 331}; 332 333int 334pcap_nametollc(const char *s) 335{ 336 struct eproto *p = llc_db; 337 338 while (p->s != 0) { 339 if (strcmp(p->s, s) == 0) 340 return p->p; 341 p += 1; 342 } 343 return PROTO_UNDEF; 344} 345 346/* Hex digit to integer. */ 347static inline int 348xdtoi(c) 349 register int c; 350{ 351 if (isdigit(c)) 352 return c - '0'; 353 else if (islower(c)) 354 return c - 'a' + 10; 355 else 356 return c - 'A' + 10; 357} 358 359int 360__pcap_atoin(const char *s, bpf_u_int32 *addr) 361{ 362 u_int n; 363 int len; 364 365 *addr = 0; 366 len = 0; 367 while (1) { 368 n = 0; 369 while (*s && *s != '.') 370 n = n * 10 + *s++ - '0'; 371 *addr <<= 8; 372 *addr |= n & 0xff; 373 len += 8; 374 if (*s == '\0') 375 return len; 376 ++s; 377 } 378 /* NOTREACHED */ 379} 380 381int 382__pcap_atodn(const char *s, bpf_u_int32 *addr) 383{ 384#define AREASHIFT 10 385#define AREAMASK 0176000 386#define NODEMASK 01777 387 388 u_int node, area; 389 390 if (sscanf(s, "%d.%d", &area, &node) != 2) 391 bpf_error("malformed decnet address '%s'", s); 392 393 *addr = (area << AREASHIFT) & AREAMASK; 394 *addr |= (node & NODEMASK); 395 396 return(32); 397} 398 399/* 400 * Convert 's', which can have the one of the forms: 401 * 402 * "xx:xx:xx:xx:xx:xx" 403 * "xx.xx.xx.xx.xx.xx" 404 * "xx-xx-xx-xx-xx-xx" 405 * "xxxx.xxxx.xxxx" 406 * "xxxxxxxxxxxx" 407 * 408 * (or various mixes of ':', '.', and '-') into a new 409 * ethernet address. Assumes 's' is well formed. 410 */ 411u_char * 412pcap_ether_aton(const char *s) 413{ 414 register u_char *ep, *e; 415 register u_int d; 416 417 e = ep = (u_char *)malloc(6); 418 if (e == NULL) 419 return (NULL); 420 421 while (*s) { 422 if (*s == ':' || *s == '.' || *s == '-') 423 s += 1; 424 d = xdtoi(*s++); 425 if (isxdigit((unsigned char)*s)) { 426 d <<= 4; 427 d |= xdtoi(*s++); 428 } 429 *ep++ = d; 430 } 431 432 return (e); 433} 434 435#ifndef HAVE_ETHER_HOSTTON 436/* Roll our own */ 437u_char * 438pcap_ether_hostton(const char *name) 439{ 440 register struct pcap_etherent *ep; 441 register u_char *ap; 442 static FILE *fp = NULL; 443 static int init = 0; 444 445 if (!init) { 446 fp = fopen(PCAP_ETHERS_FILE, "r"); 447 ++init; 448 if (fp == NULL) 449 return (NULL); 450 } else if (fp == NULL) 451 return (NULL); 452 else 453 rewind(fp); 454 455 while ((ep = pcap_next_etherent(fp)) != NULL) { 456 if (strcmp(ep->name, name) == 0) { 457 ap = (u_char *)malloc(6); 458 if (ap != NULL) { 459 memcpy(ap, ep->addr, 6); 460 return (ap); 461 } 462 break; 463 } 464 } 465 return (NULL); 466} 467#else 468 469#if !defined(HAVE_DECL_ETHER_HOSTTON) || !HAVE_DECL_ETHER_HOSTTON 470#ifndef HAVE_STRUCT_ETHER_ADDR 471struct ether_addr { 472 unsigned char ether_addr_octet[6]; 473}; 474#endif 475extern int ether_hostton(const char *, struct ether_addr *); 476#endif 477 478/* Use the os supplied routines */ 479u_char * 480pcap_ether_hostton(const char *name) 481{ 482 register u_char *ap; 483 u_char a[6]; 484 485 ap = NULL; 486 if (ether_hostton(name, (struct ether_addr *)a) == 0) { 487 ap = (u_char *)malloc(6); 488 if (ap != NULL) 489 memcpy((char *)ap, (char *)a, 6); 490 } 491 return (ap); 492} 493#endif 494 495u_short 496__pcap_nametodnaddr(const char *name) 497{ 498#ifdef DECNETLIB 499 struct nodeent *getnodebyname(); 500 struct nodeent *nep; 501 unsigned short res; 502 503 nep = getnodebyname(name); 504 if (nep == ((struct nodeent *)0)) 505 bpf_error("unknown decnet host name '%s'\n", name); 506 507 memcpy((char *)&res, (char *)nep->n_addr, sizeof(unsigned short)); 508 return(res); 509#else 510 bpf_error("decnet name support not included, '%s' cannot be translated\n", 511 name); 512 return(0); 513#endif 514} 515