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 error != EAI_SERVICE) { 311 /* 312 * This is a real error, not just "there's 313 * no such service name". 314 * XXX - this doesn't return an error string. 315 */ 316 return 0; 317 } 318 } else { 319 /* 320 * OK, we found it. Did it find anything? 321 */ 322 for (ai = res; ai != NULL; ai = ai->ai_next) { 323 /* 324 * Does it have an address? 325 */ 326 if (ai->ai_addr != NULL) { 327 /* 328 * Yes. Get a port number; we're done. 329 */ 330 if (ai->ai_addr->sa_family == AF_INET) { 331 in4 = (struct sockaddr_in *)ai->ai_addr; 332 tcp_port = ntohs(in4->sin_port); 333 break; 334 } 335 #ifdef INET6 336 if (ai->ai_addr->sa_family == AF_INET6) { 337 in6 = (struct sockaddr_in6 *)ai->ai_addr; 338 tcp_port = ntohs(in6->sin6_port); 339 break; 340 } 341 #endif 342 } 343 } 344 freeaddrinfo(res); 345 } 346 347 memset(&hints, 0, sizeof(hints)); 348 hints.ai_family = PF_UNSPEC; 349 hints.ai_socktype = SOCK_DGRAM; 350 hints.ai_protocol = IPPROTO_UDP; 351 error = getaddrinfo(NULL, name, &hints, &res); 352 if (error != 0) { 353 if (error != EAI_NONAME && 354 error != EAI_SERVICE) { 355 /* 356 * This is a real error, not just "there's 357 * no such service name". 358 * XXX - this doesn't return an error string. 359 */ 360 return 0; 361 } 362 } else { 363 /* 364 * OK, we found it. Did it find anything? 365 */ 366 for (ai = res; ai != NULL; ai = ai->ai_next) { 367 /* 368 * Does it have an address? 369 */ 370 if (ai->ai_addr != NULL) { 371 /* 372 * Yes. Get a port number; we're done. 373 */ 374 if (ai->ai_addr->sa_family == AF_INET) { 375 in4 = (struct sockaddr_in *)ai->ai_addr; 376 udp_port = ntohs(in4->sin_port); 377 break; 378 } 379 #ifdef INET6 380 if (ai->ai_addr->sa_family == AF_INET6) { 381 in6 = (struct sockaddr_in6 *)ai->ai_addr; 382 udp_port = ntohs(in6->sin6_port); 383 break; 384 } 385 #endif 386 } 387 } 388 freeaddrinfo(res); 389 } 390 391 /* 392 * We need to check /etc/services for ambiguous entries. 393 * If we find an ambiguous entry, and it has the 394 * same port number, change the proto to PROTO_UNDEF 395 * so both TCP and UDP will be checked. 396 */ 397 if (tcp_port >= 0) { 398 *port = tcp_port; 399 *proto = IPPROTO_TCP; 400 if (udp_port >= 0) { 401 if (udp_port == tcp_port) 402 *proto = PROTO_UNDEF; 403 #ifdef notdef 404 else 405 /* Can't handle ambiguous names that refer 406 to different port numbers. */ 407 warning("ambiguous port %s in /etc/services", 408 name); 409 #endif 410 } 411 return 1; 412 } 413 if (udp_port >= 0) { 414 *port = udp_port; 415 *proto = IPPROTO_UDP; 416 return 1; 417 } 418 #if defined(ultrix) || defined(__osf__) 419 /* Special hack in case NFS isn't in /etc/services */ 420 if (strcmp(name, "nfs") == 0) { 421 *port = 2049; 422 *proto = PROTO_UNDEF; 423 return 1; 424 } 425 #endif 426 return 0; 427 } 428 429 /* 430 * Convert a string in the form PPP-PPP, where correspond to ports, to 431 * a starting and ending port in a port range. 432 * Return 0 on failure. 433 */ 434 int 435 pcap_nametoportrange(const char *name, int *port1, int *port2, int *proto) 436 { 437 u_int p1, p2; 438 char *off, *cpy; 439 int save_proto; 440 441 if (sscanf(name, "%d-%d", &p1, &p2) != 2) { 442 if ((cpy = strdup(name)) == NULL) 443 return 0; 444 445 if ((off = strchr(cpy, '-')) == NULL) { 446 free(cpy); 447 return 0; 448 } 449 450 *off = '\0'; 451 452 if (pcap_nametoport(cpy, port1, proto) == 0) { 453 free(cpy); 454 return 0; 455 } 456 save_proto = *proto; 457 458 if (pcap_nametoport(off + 1, port2, proto) == 0) { 459 free(cpy); 460 return 0; 461 } 462 free(cpy); 463 464 if (*proto != save_proto) 465 *proto = PROTO_UNDEF; 466 } else { 467 *port1 = p1; 468 *port2 = p2; 469 *proto = PROTO_UNDEF; 470 } 471 472 return 1; 473 } 474 475 /* 476 * XXX - not guaranteed to be thread-safe! See below for platforms 477 * on which it is thread-safe and on which it isn't. 478 */ 479 int 480 pcap_nametoproto(const char *str) 481 { 482 struct protoent *p; 483 #if defined(HAVE_LINUX_GETNETBYNAME_R) 484 /* 485 * We have Linux's reentrant getprotobyname_r(). 486 */ 487 struct protoent result_buf; 488 char buf[1024]; /* arbitrary size */ 489 int err; 490 491 err = getprotobyname_r(str, &result_buf, buf, sizeof buf, &p); 492 if (err != 0) { 493 /* 494 * XXX - dynamically allocate the buffer, and make it 495 * bigger if we get ERANGE back? 496 */ 497 return 0; 498 } 499 #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) 500 /* 501 * We have Solaris's and IRIX's reentrant getprotobyname_r(). 502 */ 503 struct protoent result_buf; 504 char buf[1024]; /* arbitrary size */ 505 506 p = getprotobyname_r(str, &result_buf, buf, (int)sizeof buf); 507 #elif defined(HAVE_AIX_GETNETBYNAME_R) 508 /* 509 * We have AIX's reentrant getprotobyname_r(). 510 */ 511 struct protoent result_buf; 512 struct protoent_data proto_data; 513 514 if (getprotobyname_r(str, &result_buf, &proto_data) == -1) 515 p = NULL; 516 else 517 p = &result_buf; 518 #else 519 /* 520 * We don't have any getprotobyname_r(); either we have a 521 * getprotobyname() that uses thread-specific data, in which 522 * case we're thread-safe (sufficiently recent FreeBSD, 523 * sufficiently recent Darwin-based OS, sufficiently recent 524 * HP-UX, sufficiently recent Tru64 UNIX, Windows), or we have 525 * the traditional getprotobyname() (everything else, including 526 * current NetBSD and OpenBSD), in which case we're not 527 * thread-safe. 528 */ 529 p = getprotobyname(str); 530 #endif 531 if (p != 0) 532 return p->p_proto; 533 else 534 return PROTO_UNDEF; 535 } 536 537 #include "ethertype.h" 538 539 struct eproto { 540 const char *s; 541 u_short p; 542 }; 543 544 /* 545 * Static data base of ether protocol types. 546 * tcpdump used to import this, and it's declared as an export on 547 * Debian, at least, so make it a public symbol, even though we 548 * don't officially export it by declaring it in a header file. 549 * (Programs *should* do this themselves, as tcpdump now does.) 550 * 551 * We declare it here, right before defining it, to squelch any 552 * warnings we might get from compilers about the lack of a 553 * declaration. 554 */ 555 PCAP_API struct eproto eproto_db[]; 556 PCAP_API_DEF struct eproto eproto_db[] = { 557 { "pup", ETHERTYPE_PUP }, 558 { "xns", ETHERTYPE_NS }, 559 { "ip", ETHERTYPE_IP }, 560 #ifdef INET6 561 { "ip6", ETHERTYPE_IPV6 }, 562 #endif 563 { "arp", ETHERTYPE_ARP }, 564 { "rarp", ETHERTYPE_REVARP }, 565 { "sprite", ETHERTYPE_SPRITE }, 566 { "mopdl", ETHERTYPE_MOPDL }, 567 { "moprc", ETHERTYPE_MOPRC }, 568 { "decnet", ETHERTYPE_DN }, 569 { "lat", ETHERTYPE_LAT }, 570 { "sca", ETHERTYPE_SCA }, 571 { "lanbridge", ETHERTYPE_LANBRIDGE }, 572 { "vexp", ETHERTYPE_VEXP }, 573 { "vprod", ETHERTYPE_VPROD }, 574 { "atalk", ETHERTYPE_ATALK }, 575 { "atalkarp", ETHERTYPE_AARP }, 576 { "loopback", ETHERTYPE_LOOPBACK }, 577 { "decdts", ETHERTYPE_DECDTS }, 578 { "decdns", ETHERTYPE_DECDNS }, 579 { (char *)0, 0 } 580 }; 581 582 int 583 pcap_nametoeproto(const char *s) 584 { 585 struct eproto *p = eproto_db; 586 587 while (p->s != 0) { 588 if (strcmp(p->s, s) == 0) 589 return p->p; 590 p += 1; 591 } 592 return PROTO_UNDEF; 593 } 594 595 #include "llc.h" 596 597 /* Static data base of LLC values. */ 598 static struct eproto llc_db[] = { 599 { "iso", LLCSAP_ISONS }, 600 { "stp", LLCSAP_8021D }, 601 { "ipx", LLCSAP_IPX }, 602 { "netbeui", LLCSAP_NETBEUI }, 603 { (char *)0, 0 } 604 }; 605 606 int 607 pcap_nametollc(const char *s) 608 { 609 struct eproto *p = llc_db; 610 611 while (p->s != 0) { 612 if (strcmp(p->s, s) == 0) 613 return p->p; 614 p += 1; 615 } 616 return PROTO_UNDEF; 617 } 618 619 /* Hex digit to 8-bit unsigned integer. */ 620 static inline u_char 621 xdtoi(u_char c) 622 { 623 if (isdigit(c)) 624 return (u_char)(c - '0'); 625 else if (islower(c)) 626 return (u_char)(c - 'a' + 10); 627 else 628 return (u_char)(c - 'A' + 10); 629 } 630 631 int 632 __pcap_atoin(const char *s, bpf_u_int32 *addr) 633 { 634 u_int n; 635 int len; 636 637 *addr = 0; 638 len = 0; 639 for (;;) { 640 n = 0; 641 while (*s && *s != '.') 642 n = n * 10 + *s++ - '0'; 643 *addr <<= 8; 644 *addr |= n & 0xff; 645 len += 8; 646 if (*s == '\0') 647 return len; 648 ++s; 649 } 650 /* NOTREACHED */ 651 } 652 653 int 654 __pcap_atodn(const char *s, bpf_u_int32 *addr) 655 { 656 #define AREASHIFT 10 657 #define AREAMASK 0176000 658 #define NODEMASK 01777 659 660 u_int node, area; 661 662 if (sscanf(s, "%d.%d", &area, &node) != 2) 663 return(0); 664 665 *addr = (area << AREASHIFT) & AREAMASK; 666 *addr |= (node & NODEMASK); 667 668 return(32); 669 } 670 671 /* 672 * Convert 's', which can have the one of the forms: 673 * 674 * "xx:xx:xx:xx:xx:xx" 675 * "xx.xx.xx.xx.xx.xx" 676 * "xx-xx-xx-xx-xx-xx" 677 * "xxxx.xxxx.xxxx" 678 * "xxxxxxxxxxxx" 679 * 680 * (or various mixes of ':', '.', and '-') into a new 681 * ethernet address. Assumes 's' is well formed. 682 */ 683 u_char * 684 pcap_ether_aton(const char *s) 685 { 686 register u_char *ep, *e; 687 register u_char d; 688 689 e = ep = (u_char *)malloc(6); 690 if (e == NULL) 691 return (NULL); 692 693 while (*s) { 694 if (*s == ':' || *s == '.' || *s == '-') 695 s += 1; 696 d = xdtoi(*s++); 697 if (isxdigit((unsigned char)*s)) { 698 d <<= 4; 699 d |= xdtoi(*s++); 700 } 701 *ep++ = d; 702 } 703 704 return (e); 705 } 706 707 #ifndef HAVE_ETHER_HOSTTON 708 /* 709 * Roll our own. 710 * XXX - not thread-safe, because pcap_next_etherent() isn't thread- 711 * safe! Needs a mutex or a thread-safe pcap_next_etherent(). 712 */ 713 u_char * 714 pcap_ether_hostton(const char *name) 715 { 716 register struct pcap_etherent *ep; 717 register u_char *ap; 718 static FILE *fp = NULL; 719 static int init = 0; 720 721 if (!init) { 722 fp = fopen(PCAP_ETHERS_FILE, "r"); 723 ++init; 724 if (fp == NULL) 725 return (NULL); 726 } else if (fp == NULL) 727 return (NULL); 728 else 729 rewind(fp); 730 731 while ((ep = pcap_next_etherent(fp)) != NULL) { 732 if (strcmp(ep->name, name) == 0) { 733 ap = (u_char *)malloc(6); 734 if (ap != NULL) { 735 memcpy(ap, ep->addr, 6); 736 return (ap); 737 } 738 break; 739 } 740 } 741 return (NULL); 742 } 743 #else 744 /* 745 * Use the OS-supplied routine. 746 * This *should* be thread-safe; the API doesn't have a static buffer. 747 */ 748 u_char * 749 pcap_ether_hostton(const char *name) 750 { 751 register u_char *ap; 752 u_char a[6]; 753 754 ap = NULL; 755 if (ether_hostton(name, (struct ether_addr *)a) == 0) { 756 ap = (u_char *)malloc(6); 757 if (ap != NULL) 758 memcpy((char *)ap, (char *)a, 6); 759 } 760 return (ap); 761 } 762 #endif 763 764 /* 765 * XXX - not guaranteed to be thread-safe! 766 */ 767 int 768 #ifdef DECNETLIB 769 __pcap_nametodnaddr(const char *name, u_short *res) 770 { 771 struct nodeent *getnodebyname(); 772 struct nodeent *nep; 773 774 nep = getnodebyname(name); 775 if (nep == ((struct nodeent *)0)) 776 return(0); 777 778 memcpy((char *)res, (char *)nep->n_addr, sizeof(unsigned short)); 779 return(1); 780 #else 781 __pcap_nametodnaddr(const char *name _U_, u_short *res _U_) 782 { 783 return(0); 784 #endif 785 } 786
