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 #ifdef HAVE_CONFIG_H 26 #include <config.h> 27 #endif 28 29 #ifdef DECNETLIB 30 #include <sys/types.h> 31 #include <netdnet/dnetdb.h> 32 #endif 33 34 #ifdef _WIN32 35 #include <winsock2.h> 36 #include <ws2tcpip.h> 37 38 #ifdef INET6 39 /* 40 * To quote the MSDN page for getaddrinfo() at 41 * 42 * https://msdn.microsoft.com/en-us/library/windows/desktop/ms738520(v=vs.85).aspx 43 * 44 * "Support for getaddrinfo on Windows 2000 and older versions 45 * The getaddrinfo function was added to the Ws2_32.dll on Windows XP and 46 * later. To execute an application that uses this function on earlier 47 * versions of Windows, then you need to include the Ws2tcpip.h and 48 * Wspiapi.h files. When the Wspiapi.h include file is added, the 49 * getaddrinfo function is defined to the WspiapiGetAddrInfo inline 50 * function in the Wspiapi.h file. At runtime, the WspiapiGetAddrInfo 51 * function is implemented in such a way that if the Ws2_32.dll or the 52 * Wship6.dll (the file containing getaddrinfo in the IPv6 Technology 53 * Preview for Windows 2000) does not include getaddrinfo, then a 54 * version of getaddrinfo is implemented inline based on code in the 55 * Wspiapi.h header file. This inline code will be used on older Windows 56 * platforms that do not natively support the getaddrinfo function." 57 * 58 * We use getaddrinfo(), so we include Wspiapi.h here. 59 */ 60 #include <wspiapi.h> 61 #endif /* INET6 */ 62 #else /* _WIN32 */ 63 #include <sys/param.h> 64 #include <sys/types.h> 65 #include <sys/socket.h> 66 #include <sys/time.h> 67 68 #include <netinet/in.h> 69 70 #ifdef HAVE_ETHER_HOSTTON 71 #if defined(NET_ETHERNET_H_DECLARES_ETHER_HOSTTON) 72 /* 73 * OK, just include <net/ethernet.h>. 74 */ 75 #include <net/ethernet.h> 76 #elif defined(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON) 77 /* 78 * OK, just include <netinet/ether.h> 79 */ 80 #include <netinet/ether.h> 81 #elif defined(SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON) 82 /* 83 * OK, just include <sys/ethernet.h> 84 */ 85 #include <sys/ethernet.h> 86 #elif defined(ARPA_INET_H_DECLARES_ETHER_HOSTTON) 87 /* 88 * OK, just include <arpa/inet.h> 89 */ 90 #include <arpa/inet.h> 91 #elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON) 92 /* 93 * OK, include <netinet/if_ether.h>, after all the other stuff we 94 * need to include or define for its benefit. 95 */ 96 #define NEED_NETINET_IF_ETHER_H 97 #else 98 /* 99 * We'll have to declare it ourselves. 100 * If <netinet/if_ether.h> defines struct ether_addr, include 101 * it. Otherwise, define it ourselves. 102 */ 103 #ifdef HAVE_STRUCT_ETHER_ADDR 104 #define NEED_NETINET_IF_ETHER_H 105 #else /* HAVE_STRUCT_ETHER_ADDR */ 106 struct ether_addr { 107 unsigned char ether_addr_octet[6]; 108 }; 109 #endif /* HAVE_STRUCT_ETHER_ADDR */ 110 #endif /* what declares ether_hostton() */ 111 112 #ifdef NEED_NETINET_IF_ETHER_H 113 #include <net/if.h> /* Needed on some platforms */ 114 #include <netinet/in.h> /* Needed on some platforms */ 115 #include <netinet/if_ether.h> 116 #endif /* NEED_NETINET_IF_ETHER_H */ 117 118 #ifndef HAVE_DECL_ETHER_HOSTTON 119 /* 120 * No header declares it, so declare it ourselves. 121 */ 122 extern int ether_hostton(const char *, struct ether_addr *); 123 #endif /* !defined(HAVE_DECL_ETHER_HOSTTON) */ 124 #endif /* HAVE_ETHER_HOSTTON */ 125 126 #include <arpa/inet.h> 127 #include <netdb.h> 128 #endif /* _WIN32 */ 129 130 #include <errno.h> 131 #include <stdlib.h> 132 #include <string.h> 133 #include <stdio.h> 134 135 #include "pcap-int.h" 136 137 #include "diag-control.h" 138 139 #include "gencode.h" 140 #include <pcap/namedb.h> 141 #include "nametoaddr.h" 142 143 #ifdef HAVE_OS_PROTO_H 144 #include "os-proto.h" 145 #endif 146 147 #ifndef NTOHL 148 #define NTOHL(x) (x) = ntohl(x) 149 #define NTOHS(x) (x) = ntohs(x) 150 #endif 151 152 /* 153 * Convert host name to internet address. 154 * Return 0 upon failure. 155 * XXX - not thread-safe; don't use it inside libpcap. 156 */ 157 bpf_u_int32 ** 158 pcap_nametoaddr(const char *name) 159 { 160 #ifndef h_addr 161 static bpf_u_int32 *hlist[2]; 162 #endif 163 bpf_u_int32 **p; 164 struct hostent *hp; 165 166 /* 167 * gethostbyname() is deprecated on Windows, perhaps because 168 * it's not thread-safe, or because it doesn't support IPv6, 169 * or both. 170 * 171 * We deprecate pcap_nametoaddr() on all platforms because 172 * it's not thread-safe; we supply it for backwards compatibility, 173 * so suppress the deprecation warning. We could, I guess, 174 * use getaddrinfo() and construct the array ourselves, but 175 * that's probably not worth the effort, as that wouldn't make 176 * this thread-safe - we can't change the API to require that 177 * our caller free the address array, so we still have to reuse 178 * a local array. 179 */ 180 DIAG_OFF_DEPRECATION 181 if ((hp = gethostbyname(name)) != NULL) { 182 DIAG_ON_DEPRECATION 183 #ifndef h_addr 184 hlist[0] = (bpf_u_int32 *)hp->h_addr; 185 NTOHL(hp->h_addr); 186 return hlist; 187 #else 188 for (p = (bpf_u_int32 **)hp->h_addr_list; *p; ++p) 189 NTOHL(**p); 190 return (bpf_u_int32 **)hp->h_addr_list; 191 #endif 192 } 193 else 194 return 0; 195 } 196 197 struct addrinfo * 198 pcap_nametoaddrinfo(const char *name) 199 { 200 struct addrinfo hints, *res; 201 int error; 202 203 memset(&hints, 0, sizeof(hints)); 204 hints.ai_family = PF_UNSPEC; 205 hints.ai_socktype = SOCK_STREAM; /*not really*/ 206 hints.ai_protocol = IPPROTO_TCP; /*not really*/ 207 error = getaddrinfo(name, NULL, &hints, &res); 208 if (error) 209 return NULL; 210 else 211 return res; 212 } 213 214 /* 215 * Convert net name to internet address. 216 * Return 0 upon failure. 217 * XXX - not guaranteed to be thread-safe! See below for platforms 218 * on which it is thread-safe and on which it isn't. 219 */ 220 #if defined(_WIN32) || defined(__CYGWIN__) 221 bpf_u_int32 222 pcap_nametonetaddr(const char *name _U_) 223 { 224 /* 225 * There's no "getnetbyname()" on Windows. 226 * 227 * XXX - I guess we could use the BSD code to read 228 * C:\Windows\System32\drivers\etc/networks, assuming 229 * that's its home on all the versions of Windows 230 * we use, but that file probably just has the loopback 231 * network on 127/24 on 99 44/100% of Windows machines. 232 * 233 * (Heck, these days it probably just has that on 99 44/100% 234 * of *UN*X* machines.) 235 */ 236 return 0; 237 } 238 #else /* _WIN32 */ 239 bpf_u_int32 240 pcap_nametonetaddr(const char *name) 241 { 242 /* 243 * UN*X. 244 */ 245 struct netent *np; 246 #if defined(HAVE_LINUX_GETNETBYNAME_R) 247 /* 248 * We have Linux's reentrant getnetbyname_r(). 249 */ 250 struct netent result_buf; 251 char buf[1024]; /* arbitrary size */ 252 int h_errnoval; 253 int err; 254 255 /* 256 * Apparently, the man page at 257 * 258 * http://man7.org/linux/man-pages/man3/getnetbyname_r.3.html 259 * 260 * lies when it says 261 * 262 * If the function call successfully obtains a network record, 263 * then *result is set pointing to result_buf; otherwise, *result 264 * is set to NULL. 265 * 266 * and, in fact, at least in some versions of GNU libc, it does 267 * *not* always get set if getnetbyname_r() succeeds. 268 */ 269 np = NULL; 270 err = getnetbyname_r(name, &result_buf, buf, sizeof buf, &np, 271 &h_errnoval); 272 if (err != 0) { 273 /* 274 * XXX - dynamically allocate the buffer, and make it 275 * bigger if we get ERANGE back? 276 */ 277 return 0; 278 } 279 #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) 280 /* 281 * We have Solaris's and IRIX's reentrant getnetbyname_r(). 282 */ 283 struct netent result_buf; 284 char buf[1024]; /* arbitrary size */ 285 286 np = getnetbyname_r(name, &result_buf, buf, (int)sizeof buf); 287 #elif defined(HAVE_AIX_GETNETBYNAME_R) 288 /* 289 * We have AIX's reentrant getnetbyname_r(). 290 */ 291 struct netent result_buf; 292 struct netent_data net_data; 293 294 if (getnetbyname_r(name, &result_buf, &net_data) == -1) 295 np = NULL; 296 else 297 np = &result_buf; 298 #else 299 /* 300 * We don't have any getnetbyname_r(); either we have a 301 * getnetbyname() that uses thread-specific data, in which 302 * case we're thread-safe (sufficiently recent FreeBSD, 303 * sufficiently recent Darwin-based OS, sufficiently recent 304 * HP-UX, sufficiently recent Tru64 UNIX), or we have the 305 * traditional getnetbyname() (everything else, including 306 * current NetBSD and OpenBSD), in which case we're not 307 * thread-safe. 308 */ 309 np = getnetbyname(name); 310 #endif 311 if (np != NULL) 312 return np->n_net; 313 else 314 return 0; 315 } 316 #endif /* _WIN32 */ 317 318 /* 319 * Convert a port name to its port and protocol numbers. 320 * We assume only TCP or UDP. 321 * Return 0 upon failure. 322 */ 323 int 324 pcap_nametoport(const char *name, int *port, int *proto) 325 { 326 struct addrinfo hints, *res, *ai; 327 int error; 328 struct sockaddr_in *in4; 329 #ifdef INET6 330 struct sockaddr_in6 *in6; 331 #endif 332 int tcp_port = -1; 333 int udp_port = -1; 334 335 /* 336 * We check for both TCP and UDP in case there are 337 * ambiguous entries. 338 */ 339 memset(&hints, 0, sizeof(hints)); 340 hints.ai_family = PF_UNSPEC; 341 hints.ai_socktype = SOCK_STREAM; 342 hints.ai_protocol = IPPROTO_TCP; 343 error = getaddrinfo(NULL, name, &hints, &res); 344 if (error != 0) { 345 if (error != EAI_NONAME && 346 error != EAI_SERVICE) { 347 /* 348 * This is a real error, not just "there's 349 * no such service name". 350 * XXX - this doesn't return an error string. 351 */ 352 return 0; 353 } 354 } else { 355 /* 356 * OK, we found it. Did it find anything? 357 */ 358 for (ai = res; ai != NULL; ai = ai->ai_next) { 359 /* 360 * Does it have an address? 361 */ 362 if (ai->ai_addr != NULL) { 363 /* 364 * Yes. Get a port number; we're done. 365 */ 366 if (ai->ai_addr->sa_family == AF_INET) { 367 in4 = (struct sockaddr_in *)ai->ai_addr; 368 tcp_port = ntohs(in4->sin_port); 369 break; 370 } 371 #ifdef INET6 372 if (ai->ai_addr->sa_family == AF_INET6) { 373 in6 = (struct sockaddr_in6 *)ai->ai_addr; 374 tcp_port = ntohs(in6->sin6_port); 375 break; 376 } 377 #endif 378 } 379 } 380 freeaddrinfo(res); 381 } 382 383 memset(&hints, 0, sizeof(hints)); 384 hints.ai_family = PF_UNSPEC; 385 hints.ai_socktype = SOCK_DGRAM; 386 hints.ai_protocol = IPPROTO_UDP; 387 error = getaddrinfo(NULL, name, &hints, &res); 388 if (error != 0) { 389 if (error != EAI_NONAME && 390 error != EAI_SERVICE) { 391 /* 392 * This is a real error, not just "there's 393 * no such service name". 394 * XXX - this doesn't return an error string. 395 */ 396 return 0; 397 } 398 } else { 399 /* 400 * OK, we found it. Did it find anything? 401 */ 402 for (ai = res; ai != NULL; ai = ai->ai_next) { 403 /* 404 * Does it have an address? 405 */ 406 if (ai->ai_addr != NULL) { 407 /* 408 * Yes. Get a port number; we're done. 409 */ 410 if (ai->ai_addr->sa_family == AF_INET) { 411 in4 = (struct sockaddr_in *)ai->ai_addr; 412 udp_port = ntohs(in4->sin_port); 413 break; 414 } 415 #ifdef INET6 416 if (ai->ai_addr->sa_family == AF_INET6) { 417 in6 = (struct sockaddr_in6 *)ai->ai_addr; 418 udp_port = ntohs(in6->sin6_port); 419 break; 420 } 421 #endif 422 } 423 } 424 freeaddrinfo(res); 425 } 426 427 /* 428 * We need to check /etc/services for ambiguous entries. 429 * If we find an ambiguous entry, and it has the 430 * same port number, change the proto to PROTO_UNDEF 431 * so both TCP and UDP will be checked. 432 */ 433 if (tcp_port >= 0) { 434 *port = tcp_port; 435 *proto = IPPROTO_TCP; 436 if (udp_port >= 0) { 437 if (udp_port == tcp_port) 438 *proto = PROTO_UNDEF; 439 #ifdef notdef 440 else 441 /* Can't handle ambiguous names that refer 442 to different port numbers. */ 443 warning("ambiguous port %s in /etc/services", 444 name); 445 #endif 446 } 447 return 1; 448 } 449 if (udp_port >= 0) { 450 *port = udp_port; 451 *proto = IPPROTO_UDP; 452 return 1; 453 } 454 #if defined(ultrix) || defined(__osf__) 455 /* Special hack in case NFS isn't in /etc/services */ 456 if (strcmp(name, "nfs") == 0) { 457 *port = 2049; 458 *proto = PROTO_UNDEF; 459 return 1; 460 } 461 #endif 462 return 0; 463 } 464 465 /* 466 * Convert a string in the form PPP-PPP, where correspond to ports, to 467 * a starting and ending port in a port range. 468 * Return 0 on failure. 469 */ 470 int 471 pcap_nametoportrange(const char *name, int *port1, int *port2, int *proto) 472 { 473 u_int p1, p2; 474 char *off, *cpy; 475 int save_proto; 476 477 if (sscanf(name, "%d-%d", &p1, &p2) != 2) { 478 if ((cpy = strdup(name)) == NULL) 479 return 0; 480 481 if ((off = strchr(cpy, '-')) == NULL) { 482 free(cpy); 483 return 0; 484 } 485 486 *off = '\0'; 487 488 if (pcap_nametoport(cpy, port1, proto) == 0) { 489 free(cpy); 490 return 0; 491 } 492 save_proto = *proto; 493 494 if (pcap_nametoport(off + 1, port2, proto) == 0) { 495 free(cpy); 496 return 0; 497 } 498 free(cpy); 499 500 if (*proto != save_proto) 501 *proto = PROTO_UNDEF; 502 } else { 503 *port1 = p1; 504 *port2 = p2; 505 *proto = PROTO_UNDEF; 506 } 507 508 return 1; 509 } 510 511 /* 512 * XXX - not guaranteed to be thread-safe! See below for platforms 513 * on which it is thread-safe and on which it isn't. 514 */ 515 int 516 pcap_nametoproto(const char *str) 517 { 518 struct protoent *p; 519 #if defined(HAVE_LINUX_GETNETBYNAME_R) 520 /* 521 * We have Linux's reentrant getprotobyname_r(). 522 */ 523 struct protoent result_buf; 524 char buf[1024]; /* arbitrary size */ 525 int err; 526 527 err = getprotobyname_r(str, &result_buf, buf, sizeof buf, &p); 528 if (err != 0) { 529 /* 530 * XXX - dynamically allocate the buffer, and make it 531 * bigger if we get ERANGE back? 532 */ 533 return 0; 534 } 535 #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) 536 /* 537 * We have Solaris's and IRIX's reentrant getprotobyname_r(). 538 */ 539 struct protoent result_buf; 540 char buf[1024]; /* arbitrary size */ 541 542 p = getprotobyname_r(str, &result_buf, buf, (int)sizeof buf); 543 #elif defined(HAVE_AIX_GETNETBYNAME_R) 544 /* 545 * We have AIX's reentrant getprotobyname_r(). 546 */ 547 struct protoent result_buf; 548 struct protoent_data proto_data; 549 550 if (getprotobyname_r(str, &result_buf, &proto_data) == -1) 551 p = NULL; 552 else 553 p = &result_buf; 554 #else 555 /* 556 * We don't have any getprotobyname_r(); either we have a 557 * getprotobyname() that uses thread-specific data, in which 558 * case we're thread-safe (sufficiently recent FreeBSD, 559 * sufficiently recent Darwin-based OS, sufficiently recent 560 * HP-UX, sufficiently recent Tru64 UNIX, Windows), or we have 561 * the traditional getprotobyname() (everything else, including 562 * current NetBSD and OpenBSD), in which case we're not 563 * thread-safe. 564 */ 565 p = getprotobyname(str); 566 #endif 567 if (p != 0) 568 return p->p_proto; 569 else 570 return PROTO_UNDEF; 571 } 572 573 #include "ethertype.h" 574 575 struct eproto { 576 const char *s; 577 u_short p; 578 }; 579 580 /* 581 * Static data base of ether protocol types. 582 * tcpdump used to import this, and it's declared as an export on 583 * Debian, at least, so make it a public symbol, even though we 584 * don't officially export it by declaring it in a header file. 585 * (Programs *should* do this themselves, as tcpdump now does.) 586 * 587 * We declare it here, right before defining it, to squelch any 588 * warnings we might get from compilers about the lack of a 589 * declaration. 590 */ 591 PCAP_API struct eproto eproto_db[]; 592 PCAP_API_DEF struct eproto eproto_db[] = { 593 { "aarp", ETHERTYPE_AARP }, 594 { "arp", ETHERTYPE_ARP }, 595 { "atalk", ETHERTYPE_ATALK }, 596 { "decnet", ETHERTYPE_DN }, 597 { "ip", ETHERTYPE_IP }, 598 #ifdef INET6 599 { "ip6", ETHERTYPE_IPV6 }, 600 #endif 601 { "lat", ETHERTYPE_LAT }, 602 { "loopback", ETHERTYPE_LOOPBACK }, 603 { "mopdl", ETHERTYPE_MOPDL }, 604 { "moprc", ETHERTYPE_MOPRC }, 605 { "rarp", ETHERTYPE_REVARP }, 606 { "sca", ETHERTYPE_SCA }, 607 { (char *)0, 0 } 608 }; 609 610 int 611 pcap_nametoeproto(const char *s) 612 { 613 struct eproto *p = eproto_db; 614 615 while (p->s != 0) { 616 if (strcmp(p->s, s) == 0) 617 return p->p; 618 p += 1; 619 } 620 return PROTO_UNDEF; 621 } 622 623 #include "llc.h" 624 625 /* Static data base of LLC values. */ 626 static struct eproto llc_db[] = { 627 { "iso", LLCSAP_ISONS }, 628 { "stp", LLCSAP_8021D }, 629 { "ipx", LLCSAP_IPX }, 630 { "netbeui", LLCSAP_NETBEUI }, 631 { (char *)0, 0 } 632 }; 633 634 int 635 pcap_nametollc(const char *s) 636 { 637 struct eproto *p = llc_db; 638 639 while (p->s != 0) { 640 if (strcmp(p->s, s) == 0) 641 return p->p; 642 p += 1; 643 } 644 return PROTO_UNDEF; 645 } 646 647 /* Hex digit to 8-bit unsigned integer. */ 648 static inline u_char 649 xdtoi(u_char c) 650 { 651 if (c >= '0' && c <= '9') 652 return (u_char)(c - '0'); 653 else if (c >= 'a' && c <= 'f') 654 return (u_char)(c - 'a' + 10); 655 else 656 return (u_char)(c - 'A' + 10); 657 } 658 659 int 660 __pcap_atoin(const char *s, bpf_u_int32 *addr) 661 { 662 u_int n; 663 int len; 664 665 *addr = 0; 666 len = 0; 667 for (;;) { 668 n = 0; 669 while (*s && *s != '.') { 670 if (n > 25) { 671 /* The result will be > 255 */ 672 return -1; 673 } 674 n = n * 10 + *s++ - '0'; 675 } 676 if (n > 255) 677 return -1; 678 *addr <<= 8; 679 *addr |= n & 0xff; 680 len += 8; 681 if (*s == '\0') 682 return len; 683 ++s; 684 } 685 /* NOTREACHED */ 686 } 687 688 int 689 __pcap_atodn(const char *s, bpf_u_int32 *addr) 690 { 691 #define AREASHIFT 10 692 #define AREAMASK 0176000 693 #define NODEMASK 01777 694 695 u_int node, area; 696 697 if (sscanf(s, "%d.%d", &area, &node) != 2) 698 return(0); 699 700 *addr = (area << AREASHIFT) & AREAMASK; 701 *addr |= (node & NODEMASK); 702 703 return(32); 704 } 705 706 /* 707 * Convert 's', which can have the one of the forms: 708 * 709 * "xx:xx:xx:xx:xx:xx" 710 * "xx.xx.xx.xx.xx.xx" 711 * "xx-xx-xx-xx-xx-xx" 712 * "xxxx.xxxx.xxxx" 713 * "xxxxxxxxxxxx" 714 * 715 * (or various mixes of ':', '.', and '-') into a new 716 * ethernet address. Assumes 's' is well formed. 717 */ 718 u_char * 719 pcap_ether_aton(const char *s) 720 { 721 register u_char *ep, *e; 722 register u_char d; 723 724 e = ep = (u_char *)malloc(6); 725 if (e == NULL) 726 return (NULL); 727 728 while (*s) { 729 if (*s == ':' || *s == '.' || *s == '-') 730 s += 1; 731 d = xdtoi(*s++); 732 if (PCAP_ISXDIGIT(*s)) { 733 d <<= 4; 734 d |= xdtoi(*s++); 735 } 736 *ep++ = d; 737 } 738 739 return (e); 740 } 741 742 #ifndef HAVE_ETHER_HOSTTON 743 /* 744 * Roll our own. 745 * XXX - not thread-safe, because pcap_next_etherent() isn't thread- 746 * safe! Needs a mutex or a thread-safe pcap_next_etherent(). 747 */ 748 u_char * 749 pcap_ether_hostton(const char *name) 750 { 751 register struct pcap_etherent *ep; 752 register u_char *ap; 753 static FILE *fp = NULL; 754 static int init = 0; 755 756 if (!init) { 757 fp = fopen(PCAP_ETHERS_FILE, "r"); 758 ++init; 759 if (fp == NULL) 760 return (NULL); 761 } else if (fp == NULL) 762 return (NULL); 763 else 764 rewind(fp); 765 766 while ((ep = pcap_next_etherent(fp)) != NULL) { 767 if (strcmp(ep->name, name) == 0) { 768 ap = (u_char *)malloc(6); 769 if (ap != NULL) { 770 memcpy(ap, ep->addr, 6); 771 return (ap); 772 } 773 break; 774 } 775 } 776 return (NULL); 777 } 778 #else 779 /* 780 * Use the OS-supplied routine. 781 * This *should* be thread-safe; the API doesn't have a static buffer. 782 */ 783 u_char * 784 pcap_ether_hostton(const char *name) 785 { 786 register u_char *ap; 787 u_char a[6]; 788 789 ap = NULL; 790 if (ether_hostton(name, (struct ether_addr *)a) == 0) { 791 ap = (u_char *)malloc(6); 792 if (ap != NULL) 793 memcpy((char *)ap, (char *)a, 6); 794 } 795 return (ap); 796 } 797 #endif 798 799 /* 800 * XXX - not guaranteed to be thread-safe! 801 */ 802 int 803 #ifdef DECNETLIB 804 __pcap_nametodnaddr(const char *name, u_short *res) 805 { 806 struct nodeent *getnodebyname(); 807 struct nodeent *nep; 808 809 nep = getnodebyname(name); 810 if (nep == ((struct nodeent *)0)) 811 return(0); 812 813 memcpy((char *)res, (char *)nep->n_addr, sizeof(unsigned short)); 814 return(1); 815 #else 816 __pcap_nametodnaddr(const char *name _U_, u_short *res _U_) 817 { 818 return(0); 819 #endif 820 } 821