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