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