1 /* $NetBSD: nametoaddr.c,v 1.5 2019/10/01 16:02:11 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 * 23 * Name to id translation routines used by the scanner. 24 * These functions are not time critical. 25 */ 26 27 #include <sys/cdefs.h> 28 __RCSID("$NetBSD: nametoaddr.c,v 1.5 2019/10/01 16:02:11 christos Exp $"); 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 <winsock2.h> 41 #include <ws2tcpip.h> 42 43 #ifdef INET6 44 /* 45 * To quote the MSDN page for getaddrinfo() at 46 * 47 * https://msdn.microsoft.com/en-us/library/windows/desktop/ms738520(v=vs.85).aspx 48 * 49 * "Support for getaddrinfo on Windows 2000 and older versions 50 * The getaddrinfo function was added to the Ws2_32.dll on Windows XP and 51 * later. To execute an application that uses this function on earlier 52 * versions of Windows, then you need to include the Ws2tcpip.h and 53 * Wspiapi.h files. When the Wspiapi.h include file is added, the 54 * getaddrinfo function is defined to the WspiapiGetAddrInfo inline 55 * function in the Wspiapi.h file. At runtime, the WspiapiGetAddrInfo 56 * function is implemented in such a way that if the Ws2_32.dll or the 57 * Wship6.dll (the file containing getaddrinfo in the IPv6 Technology 58 * Preview for Windows 2000) does not include getaddrinfo, then a 59 * version of getaddrinfo is implemented inline based on code in the 60 * Wspiapi.h header file. This inline code will be used on older Windows 61 * platforms that do not natively support the getaddrinfo function." 62 * 63 * We use getaddrinfo(), so we include Wspiapi.h here. 64 */ 65 #include <wspiapi.h> 66 #endif /* INET6 */ 67 #else /* _WIN32 */ 68 #include <sys/param.h> 69 #include <sys/types.h> 70 #include <sys/socket.h> 71 #include <sys/time.h> 72 73 #include <netinet/in.h> 74 75 #ifdef HAVE_ETHER_HOSTTON 76 #if defined(NET_ETHERNET_H_DECLARES_ETHER_HOSTTON) 77 /* 78 * OK, just include <net/ethernet.h>. 79 */ 80 #include <net/ethernet.h> 81 #elif defined(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON) 82 /* 83 * OK, just include <netinet/ether.h> 84 */ 85 #include <netinet/ether.h> 86 #elif defined(SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON) 87 /* 88 * OK, just include <sys/ethernet.h> 89 */ 90 #include <sys/ethernet.h> 91 #elif defined(ARPA_INET_H_DECLARES_ETHER_HOSTTON) 92 /* 93 * OK, just include <arpa/inet.h> 94 */ 95 #include <arpa/inet.h> 96 #elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON) 97 /* 98 * OK, include <netinet/if_ether.h>, after all the other stuff we 99 * need to include or define for its benefit. 100 */ 101 #define NEED_NETINET_IF_ETHER_H 102 #else 103 /* 104 * We'll have to declare it ourselves. 105 * If <netinet/if_ether.h> defines struct ether_addr, include 106 * it. Otherwise, define it ourselves. 107 */ 108 #ifdef HAVE_STRUCT_ETHER_ADDR 109 #define NEED_NETINET_IF_ETHER_H 110 #else /* HAVE_STRUCT_ETHER_ADDR */ 111 struct ether_addr { 112 unsigned char ether_addr_octet[6]; 113 }; 114 #endif /* HAVE_STRUCT_ETHER_ADDR */ 115 #endif /* what declares ether_hostton() */ 116 117 #ifdef NEED_NETINET_IF_ETHER_H 118 #include <net/if.h> /* Needed on some platforms */ 119 #include <netinet/in.h> /* Needed on some platforms */ 120 #include <netinet/if_ether.h> 121 #endif /* NEED_NETINET_IF_ETHER_H */ 122 123 #ifndef HAVE_DECL_ETHER_HOSTTON 124 /* 125 * No header declares it, so declare it ourselves. 126 */ 127 extern int ether_hostton(const char *, struct ether_addr *); 128 #endif /* !defined(HAVE_DECL_ETHER_HOSTTON) */ 129 #endif /* HAVE_ETHER_HOSTTON */ 130 131 #include <arpa/inet.h> 132 #include <netdb.h> 133 #endif /* _WIN32 */ 134 135 #include <ctype.h> 136 #include <errno.h> 137 #include <stdlib.h> 138 #include <string.h> 139 #include <stdio.h> 140 141 #include "pcap-int.h" 142 143 #include "gencode.h" 144 #include <pcap/namedb.h> 145 #include "nametoaddr.h" 146 147 #ifdef HAVE_OS_PROTO_H 148 #include "os-proto.h" 149 #endif 150 151 #ifndef NTOHL 152 #define NTOHL(x) (x) = ntohl(x) 153 #define NTOHS(x) (x) = ntohs(x) 154 #endif 155 156 /* 157 * Convert host name to internet address. 158 * Return 0 upon failure. 159 * XXX - not thread-safe; don't use it inside libpcap. 160 */ 161 bpf_u_int32 ** 162 pcap_nametoaddr(const char *name) 163 { 164 #ifndef h_addr 165 static bpf_u_int32 *hlist[2]; 166 #endif 167 bpf_u_int32 **p; 168 struct hostent *hp; 169 170 if ((hp = gethostbyname(name)) != NULL) { 171 #ifndef h_addr 172 hlist[0] = (bpf_u_int32 *)hp->h_addr; 173 NTOHL(hp->h_addr); 174 return hlist; 175 #else 176 for (p = (bpf_u_int32 **)hp->h_addr_list; *p; ++p) 177 NTOHL(**p); 178 return (bpf_u_int32 **)hp->h_addr_list; 179 #endif 180 } 181 else 182 return 0; 183 } 184 185 struct addrinfo * 186 pcap_nametoaddrinfo(const char *name) 187 { 188 struct addrinfo hints, *res; 189 int error; 190 191 memset(&hints, 0, sizeof(hints)); 192 hints.ai_family = PF_UNSPEC; 193 hints.ai_socktype = SOCK_STREAM; /*not really*/ 194 hints.ai_protocol = IPPROTO_TCP; /*not really*/ 195 error = getaddrinfo(name, NULL, &hints, &res); 196 if (error) 197 return NULL; 198 else 199 return res; 200 } 201 202 /* 203 * Convert net name to internet address. 204 * Return 0 upon failure. 205 * XXX - not guaranteed to be thread-safe! See below for platforms 206 * on which it is thread-safe and on which it isn't. 207 */ 208 bpf_u_int32 209 pcap_nametonetaddr(const char *name) 210 { 211 #ifdef _WIN32 212 /* 213 * There's no "getnetbyname()" on Windows. 214 * 215 * XXX - I guess we could use the BSD code to read 216 * C:\Windows\System32\drivers\etc/networks, assuming 217 * that's its home on all the versions of Windows 218 * we use, but that file probably just has the loopback 219 * network on 127/24 on 99 44/100% of Windows machines. 220 * 221 * (Heck, these days it probably just has that on 99 44/100% 222 * of *UN*X* machines.) 223 */ 224 return 0; 225 #else 226 /* 227 * UN*X. 228 */ 229 struct netent *np; 230 #if defined(HAVE_LINUX_GETNETBYNAME_R) 231 /* 232 * We have Linux's reentrant getnetbyname_r(). 233 */ 234 struct netent result_buf; 235 char buf[1024]; /* arbitrary size */ 236 int h_errnoval; 237 int err; 238 239 /* 240 * Apparently, the man page at 241 * 242 * http://man7.org/linux/man-pages/man3/getnetbyname_r.3.html 243 * 244 * lies when it says 245 * 246 * If the function call successfully obtains a network record, 247 * then *result is set pointing to result_buf; otherwise, *result 248 * is set to NULL. 249 * 250 * and, in fact, at least in some versions of GNU libc, it does 251 * *not* always get set if getnetbyname_r() succeeds. 252 */ 253 np = NULL; 254 err = getnetbyname_r(name, &result_buf, buf, sizeof buf, &np, 255 &h_errnoval); 256 if (err != 0) { 257 /* 258 * XXX - dynamically allocate the buffer, and make it 259 * bigger if we get ERANGE back? 260 */ 261 return 0; 262 } 263 #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) 264 /* 265 * We have Solaris's and IRIX's reentrant getnetbyname_r(). 266 */ 267 struct netent result_buf; 268 char buf[1024]; /* arbitrary size */ 269 270 np = getnetbyname_r(name, &result_buf, buf, (int)sizeof buf); 271 #elif defined(HAVE_AIX_GETNETBYNAME_R) 272 /* 273 * We have AIX's reentrant getnetbyname_r(). 274 */ 275 struct netent result_buf; 276 struct netent_data net_data; 277 278 if (getnetbyname_r(name, &result_buf, &net_data) == -1) 279 np = NULL; 280 else 281 np = &result_buf; 282 #else 283 /* 284 * We don't have any getnetbyname_r(); either we have a 285 * getnetbyname() that uses thread-specific data, in which 286 * case we're thread-safe (sufficiently recent FreeBSD, 287 * sufficiently recent Darwin-based OS, sufficiently recent 288 * HP-UX, sufficiently recent Tru64 UNIX), or we have the 289 * traditional getnetbyname() (everything else, including 290 * current NetBSD and OpenBSD), in which case we're not 291 * thread-safe. 292 */ 293 np = getnetbyname(name); 294 #endif 295 if (np != NULL) 296 return np->n_net; 297 else 298 return 0; 299 #endif /* _WIN32 */ 300 } 301 302 /* 303 * Convert a port name to its port and protocol numbers. 304 * We assume only TCP or UDP. 305 * Return 0 upon failure. 306 */ 307 int 308 pcap_nametoport(const char *name, int *port, int *proto) 309 { 310 struct addrinfo hints, *res, *ai; 311 int error; 312 struct sockaddr_in *in4; 313 #ifdef INET6 314 struct sockaddr_in6 *in6; 315 #endif 316 int tcp_port = -1; 317 int udp_port = -1; 318 319 /* 320 * We check for both TCP and UDP in case there are 321 * ambiguous entries. 322 */ 323 memset(&hints, 0, sizeof(hints)); 324 hints.ai_family = PF_UNSPEC; 325 hints.ai_socktype = SOCK_STREAM; 326 hints.ai_protocol = IPPROTO_TCP; 327 error = getaddrinfo(NULL, name, &hints, &res); 328 if (error != 0) { 329 if (error != EAI_NONAME && 330 error != EAI_SERVICE) { 331 /* 332 * This is a real error, not just "there's 333 * no such service name". 334 * XXX - this doesn't return an error string. 335 */ 336 return 0; 337 } 338 } else { 339 /* 340 * OK, we found it. Did it find anything? 341 */ 342 for (ai = res; ai != NULL; ai = ai->ai_next) { 343 /* 344 * Does it have an address? 345 */ 346 if (ai->ai_addr != NULL) { 347 /* 348 * Yes. Get a port number; we're done. 349 */ 350 if (ai->ai_addr->sa_family == AF_INET) { 351 in4 = (struct sockaddr_in *)ai->ai_addr; 352 tcp_port = ntohs(in4->sin_port); 353 break; 354 } 355 #ifdef INET6 356 if (ai->ai_addr->sa_family == AF_INET6) { 357 in6 = (struct sockaddr_in6 *)ai->ai_addr; 358 tcp_port = ntohs(in6->sin6_port); 359 break; 360 } 361 #endif 362 } 363 } 364 freeaddrinfo(res); 365 } 366 367 memset(&hints, 0, sizeof(hints)); 368 hints.ai_family = PF_UNSPEC; 369 hints.ai_socktype = SOCK_DGRAM; 370 hints.ai_protocol = IPPROTO_UDP; 371 error = getaddrinfo(NULL, name, &hints, &res); 372 if (error != 0) { 373 if (error != EAI_NONAME && 374 error != EAI_SERVICE) { 375 /* 376 * This is a real error, not just "there's 377 * no such service name". 378 * XXX - this doesn't return an error string. 379 */ 380 return 0; 381 } 382 } else { 383 /* 384 * OK, we found it. Did it find anything? 385 */ 386 for (ai = res; ai != NULL; ai = ai->ai_next) { 387 /* 388 * Does it have an address? 389 */ 390 if (ai->ai_addr != NULL) { 391 /* 392 * Yes. Get a port number; we're done. 393 */ 394 if (ai->ai_addr->sa_family == AF_INET) { 395 in4 = (struct sockaddr_in *)ai->ai_addr; 396 udp_port = ntohs(in4->sin_port); 397 break; 398 } 399 #ifdef INET6 400 if (ai->ai_addr->sa_family == AF_INET6) { 401 in6 = (struct sockaddr_in6 *)ai->ai_addr; 402 udp_port = ntohs(in6->sin6_port); 403 break; 404 } 405 #endif 406 } 407 } 408 freeaddrinfo(res); 409 } 410 411 /* 412 * We need to check /etc/services for ambiguous entries. 413 * If we find an ambiguous entry, and it has the 414 * same port number, change the proto to PROTO_UNDEF 415 * so both TCP and UDP will be checked. 416 */ 417 if (tcp_port >= 0) { 418 *port = tcp_port; 419 *proto = IPPROTO_TCP; 420 if (udp_port >= 0) { 421 if (udp_port == tcp_port) 422 *proto = PROTO_UNDEF; 423 #ifdef notdef 424 else 425 /* Can't handle ambiguous names that refer 426 to different port numbers. */ 427 warning("ambiguous port %s in /etc/services", 428 name); 429 #endif 430 } 431 return 1; 432 } 433 if (udp_port >= 0) { 434 *port = udp_port; 435 *proto = IPPROTO_UDP; 436 return 1; 437 } 438 #if defined(ultrix) || defined(__osf__) 439 /* Special hack in case NFS isn't in /etc/services */ 440 if (strcmp(name, "nfs") == 0) { 441 *port = 2049; 442 *proto = PROTO_UNDEF; 443 return 1; 444 } 445 #endif 446 return 0; 447 } 448 449 /* 450 * Convert a string in the form PPP-PPP, where correspond to ports, to 451 * a starting and ending port in a port range. 452 * Return 0 on failure. 453 */ 454 int 455 pcap_nametoportrange(const char *name, int *port1, int *port2, int *proto) 456 { 457 u_int p1, p2; 458 char *off, *cpy; 459 int save_proto; 460 461 if (sscanf(name, "%d-%d", &p1, &p2) != 2) { 462 if ((cpy = strdup(name)) == NULL) 463 return 0; 464 465 if ((off = strchr(cpy, '-')) == NULL) { 466 free(cpy); 467 return 0; 468 } 469 470 *off = '\0'; 471 472 if (pcap_nametoport(cpy, port1, proto) == 0) { 473 free(cpy); 474 return 0; 475 } 476 save_proto = *proto; 477 478 if (pcap_nametoport(off + 1, port2, proto) == 0) { 479 free(cpy); 480 return 0; 481 } 482 free(cpy); 483 484 if (*proto != save_proto) 485 *proto = PROTO_UNDEF; 486 } else { 487 *port1 = p1; 488 *port2 = p2; 489 *proto = PROTO_UNDEF; 490 } 491 492 return 1; 493 } 494 495 /* 496 * XXX - not guaranteed to be thread-safe! See below for platforms 497 * on which it is thread-safe and on which it isn't. 498 */ 499 int 500 pcap_nametoproto(const char *str) 501 { 502 struct protoent *p; 503 #if defined(HAVE_LINUX_GETNETBYNAME_R) 504 /* 505 * We have Linux's reentrant getprotobyname_r(). 506 */ 507 struct protoent result_buf; 508 char buf[1024]; /* arbitrary size */ 509 int err; 510 511 err = getprotobyname_r(str, &result_buf, buf, sizeof buf, &p); 512 if (err != 0) { 513 /* 514 * XXX - dynamically allocate the buffer, and make it 515 * bigger if we get ERANGE back? 516 */ 517 return 0; 518 } 519 #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) 520 /* 521 * We have Solaris's and IRIX's reentrant getprotobyname_r(). 522 */ 523 struct protoent result_buf; 524 char buf[1024]; /* arbitrary size */ 525 526 p = getprotobyname_r(str, &result_buf, buf, (int)sizeof buf); 527 #elif defined(HAVE_AIX_GETNETBYNAME_R) 528 /* 529 * We have AIX's reentrant getprotobyname_r(). 530 */ 531 struct protoent result_buf; 532 struct protoent_data proto_data; 533 534 if (getprotobyname_r(str, &result_buf, &proto_data) == -1) 535 p = NULL; 536 else 537 p = &result_buf; 538 #else 539 /* 540 * We don't have any getprotobyname_r(); either we have a 541 * getprotobyname() that uses thread-specific data, in which 542 * case we're thread-safe (sufficiently recent FreeBSD, 543 * sufficiently recent Darwin-based OS, sufficiently recent 544 * HP-UX, sufficiently recent Tru64 UNIX, Windows), or we have 545 * the traditional getprotobyname() (everything else, including 546 * current NetBSD and OpenBSD), in which case we're not 547 * thread-safe. 548 */ 549 p = getprotobyname(str); 550 #endif 551 if (p != 0) 552 return p->p_proto; 553 else 554 return PROTO_UNDEF; 555 } 556 557 #include "ethertype.h" 558 559 struct eproto { 560 const char *s; 561 u_short p; 562 }; 563 564 /* 565 * Static data base of ether protocol types. 566 * tcpdump used to import this, and it's declared as an export on 567 * Debian, at least, so make it a public symbol, even though we 568 * don't officially export it by declaring it in a header file. 569 * (Programs *should* do this themselves, as tcpdump now does.) 570 * 571 * We declare it here, right before defining it, to squelch any 572 * warnings we might get from compilers about the lack of a 573 * declaration. 574 */ 575 PCAP_API struct eproto eproto_db[]; 576 PCAP_API_DEF struct eproto eproto_db[] = { 577 { "pup", ETHERTYPE_PUP }, 578 { "xns", ETHERTYPE_NS }, 579 { "ip", ETHERTYPE_IP }, 580 #ifdef INET6 581 { "ip6", ETHERTYPE_IPV6 }, 582 #endif 583 { "arp", ETHERTYPE_ARP }, 584 { "rarp", ETHERTYPE_REVARP }, 585 { "sprite", ETHERTYPE_SPRITE }, 586 { "mopdl", ETHERTYPE_MOPDL }, 587 { "moprc", ETHERTYPE_MOPRC }, 588 { "decnet", ETHERTYPE_DN }, 589 { "lat", ETHERTYPE_LAT }, 590 { "sca", ETHERTYPE_SCA }, 591 { "lanbridge", ETHERTYPE_LANBRIDGE }, 592 { "vexp", ETHERTYPE_VEXP }, 593 { "vprod", ETHERTYPE_VPROD }, 594 { "atalk", ETHERTYPE_ATALK }, 595 { "atalkarp", ETHERTYPE_AARP }, 596 { "loopback", ETHERTYPE_LOOPBACK }, 597 { "decdts", ETHERTYPE_DECDTS }, 598 { "decdns", ETHERTYPE_DECDNS }, 599 { (char *)0, 0 } 600 }; 601 602 int 603 pcap_nametoeproto(const char *s) 604 { 605 struct eproto *p = eproto_db; 606 607 while (p->s != 0) { 608 if (strcmp(p->s, s) == 0) 609 return p->p; 610 p += 1; 611 } 612 return PROTO_UNDEF; 613 } 614 615 #include "llc.h" 616 617 /* Static data base of LLC values. */ 618 static struct eproto llc_db[] = { 619 { "iso", LLCSAP_ISONS }, 620 { "stp", LLCSAP_8021D }, 621 { "ipx", LLCSAP_IPX }, 622 { "netbeui", LLCSAP_NETBEUI }, 623 { (char *)0, 0 } 624 }; 625 626 int 627 pcap_nametollc(const char *s) 628 { 629 struct eproto *p = llc_db; 630 631 while (p->s != 0) { 632 if (strcmp(p->s, s) == 0) 633 return p->p; 634 p += 1; 635 } 636 return PROTO_UNDEF; 637 } 638 639 /* Hex digit to 8-bit unsigned integer. */ 640 static inline u_char 641 xdtoi(u_char c) 642 { 643 if (isdigit(c)) 644 return (u_char)(c - '0'); 645 else if (islower(c)) 646 return (u_char)(c - 'a' + 10); 647 else 648 return (u_char)(c - 'A' + 10); 649 } 650 651 int 652 __pcap_atoin(const char *s, bpf_u_int32 *addr) 653 { 654 u_int n; 655 int len; 656 657 *addr = 0; 658 len = 0; 659 for (;;) { 660 n = 0; 661 while (*s && *s != '.') 662 n = n * 10 + *s++ - '0'; 663 *addr <<= 8; 664 *addr |= n & 0xff; 665 len += 8; 666 if (*s == '\0') 667 return len; 668 ++s; 669 } 670 /* NOTREACHED */ 671 } 672 673 int 674 __pcap_atodn(const char *s, bpf_u_int32 *addr) 675 { 676 #define AREASHIFT 10 677 #define AREAMASK 0176000 678 #define NODEMASK 01777 679 680 u_int node, area; 681 682 if (sscanf(s, "%d.%d", &area, &node) != 2) 683 return(0); 684 685 *addr = (area << AREASHIFT) & AREAMASK; 686 *addr |= (node & NODEMASK); 687 688 return(32); 689 } 690 691 /* 692 * Convert 's', which can have the one of the forms: 693 * 694 * "xx:xx:xx:xx:xx:xx" 695 * "xx.xx.xx.xx.xx.xx" 696 * "xx-xx-xx-xx-xx-xx" 697 * "xxxx.xxxx.xxxx" 698 * "xxxxxxxxxxxx" 699 * 700 * (or various mixes of ':', '.', and '-') into a new 701 * ethernet address. Assumes 's' is well formed. 702 */ 703 u_char * 704 pcap_ether_aton(const char *s) 705 { 706 register u_char *ep, *e; 707 register u_char d; 708 709 e = ep = (u_char *)malloc(6); 710 if (e == NULL) 711 return (NULL); 712 713 while (*s) { 714 if (*s == ':' || *s == '.' || *s == '-') 715 s += 1; 716 d = xdtoi(*s++); 717 if (isxdigit((unsigned char)*s)) { 718 d <<= 4; 719 d |= xdtoi(*s++); 720 } 721 *ep++ = d; 722 } 723 724 return (e); 725 } 726 727 #ifndef HAVE_ETHER_HOSTTON 728 /* 729 * Roll our own. 730 * XXX - not thread-safe, because pcap_next_etherent() isn't thread- 731 * safe! Needs a mutex or a thread-safe pcap_next_etherent(). 732 */ 733 u_char * 734 pcap_ether_hostton(const char *name) 735 { 736 register struct pcap_etherent *ep; 737 register u_char *ap; 738 static FILE *fp = NULL; 739 static int init = 0; 740 741 if (!init) { 742 fp = fopen(PCAP_ETHERS_FILE, "r"); 743 ++init; 744 if (fp == NULL) 745 return (NULL); 746 } else if (fp == NULL) 747 return (NULL); 748 else 749 rewind(fp); 750 751 while ((ep = pcap_next_etherent(fp)) != NULL) { 752 if (strcmp(ep->name, name) == 0) { 753 ap = (u_char *)malloc(6); 754 if (ap != NULL) { 755 memcpy(ap, ep->addr, 6); 756 return (ap); 757 } 758 break; 759 } 760 } 761 return (NULL); 762 } 763 #else 764 /* 765 * Use the OS-supplied routine. 766 * This *should* be thread-safe; the API doesn't have a static buffer. 767 */ 768 u_char * 769 pcap_ether_hostton(const char *name) 770 { 771 register u_char *ap; 772 u_char a[6]; 773 774 ap = NULL; 775 if (ether_hostton(name, (struct ether_addr *)a) == 0) { 776 ap = (u_char *)malloc(6); 777 if (ap != NULL) 778 memcpy((char *)ap, (char *)a, 6); 779 } 780 return (ap); 781 } 782 #endif 783 784 /* 785 * XXX - not guaranteed to be thread-safe! 786 */ 787 int 788 #ifdef DECNETLIB 789 __pcap_nametodnaddr(const char *name, u_short *res) 790 { 791 struct nodeent *getnodebyname(); 792 struct nodeent *nep; 793 794 nep = getnodebyname(name); 795 if (nep == ((struct nodeent *)0)) 796 return(0); 797 798 memcpy((char *)res, (char *)nep->n_addr, sizeof(unsigned short)); 799 return(1); 800 #else 801 __pcap_nametodnaddr(const char *name _U_, u_short *res _U_) 802 { 803 return(0); 804 #endif 805 } 806