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 #include <config.h> 26 27 #ifdef DECNETLIB 28 #include <sys/types.h> 29 #include <netdnet/dnetdb.h> 30 #endif 31 32 #ifdef _WIN32 33 #include <winsock2.h> 34 #include <ws2tcpip.h> 35 36 #ifdef INET6 37 /* 38 * To quote the MSDN page for getaddrinfo() at 39 * 40 * https://msdn.microsoft.com/en-us/library/windows/desktop/ms738520(v=vs.85).aspx 41 * 42 * "Support for getaddrinfo on Windows 2000 and older versions 43 * The getaddrinfo function was added to the Ws2_32.dll on Windows XP and 44 * later. To execute an application that uses this function on earlier 45 * versions of Windows, then you need to include the Ws2tcpip.h and 46 * Wspiapi.h files. When the Wspiapi.h include file is added, the 47 * getaddrinfo function is defined to the WspiapiGetAddrInfo inline 48 * function in the Wspiapi.h file. At runtime, the WspiapiGetAddrInfo 49 * function is implemented in such a way that if the Ws2_32.dll or the 50 * Wship6.dll (the file containing getaddrinfo in the IPv6 Technology 51 * Preview for Windows 2000) does not include getaddrinfo, then a 52 * version of getaddrinfo is implemented inline based on code in the 53 * Wspiapi.h header file. This inline code will be used on older Windows 54 * platforms that do not natively support the getaddrinfo function." 55 * 56 * We use getaddrinfo(), so we include Wspiapi.h here. 57 */ 58 #include <wspiapi.h> 59 #endif /* INET6 */ 60 #else /* _WIN32 */ 61 #include <sys/param.h> 62 #include <sys/types.h> 63 #include <sys/socket.h> 64 #include <sys/time.h> 65 66 #include <netinet/in.h> 67 68 #ifdef HAVE_ETHER_HOSTTON 69 #if defined(NET_ETHERNET_H_DECLARES_ETHER_HOSTTON) 70 /* 71 * OK, just include <net/ethernet.h>. 72 */ 73 #include <net/ethernet.h> 74 #elif defined(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON) 75 /* 76 * OK, just include <netinet/ether.h> 77 */ 78 #include <netinet/ether.h> 79 #elif defined(SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON) 80 /* 81 * OK, just include <sys/ethernet.h> 82 */ 83 #include <sys/ethernet.h> 84 #elif defined(ARPA_INET_H_DECLARES_ETHER_HOSTTON) 85 /* 86 * OK, just include <arpa/inet.h> 87 */ 88 #include <arpa/inet.h> 89 #elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON) 90 /* 91 * OK, include <netinet/if_ether.h>, after all the other stuff we 92 * need to include or define for its benefit. 93 */ 94 #define NEED_NETINET_IF_ETHER_H 95 #else 96 /* 97 * We'll have to declare it ourselves. 98 * If <netinet/if_ether.h> defines struct ether_addr, include 99 * it. Otherwise, define it ourselves. 100 */ 101 #ifdef HAVE_STRUCT_ETHER_ADDR 102 #define NEED_NETINET_IF_ETHER_H 103 #else /* HAVE_STRUCT_ETHER_ADDR */ 104 struct ether_addr { 105 unsigned char ether_addr_octet[6]; 106 }; 107 #endif /* HAVE_STRUCT_ETHER_ADDR */ 108 #endif /* what declares ether_hostton() */ 109 110 #ifdef NEED_NETINET_IF_ETHER_H 111 #include <net/if.h> /* Needed on some platforms */ 112 #include <netinet/in.h> /* Needed on some platforms */ 113 #include <netinet/if_ether.h> 114 #endif /* NEED_NETINET_IF_ETHER_H */ 115 116 #ifndef HAVE_DECL_ETHER_HOSTTON 117 /* 118 * No header declares it, so declare it ourselves. 119 */ 120 extern int ether_hostton(const char *, struct ether_addr *); 121 #endif /* !defined(HAVE_DECL_ETHER_HOSTTON) */ 122 #endif /* HAVE_ETHER_HOSTTON */ 123 124 #include <arpa/inet.h> 125 #include <netdb.h> 126 #endif /* _WIN32 */ 127 128 #include <errno.h> 129 #include <stdlib.h> 130 #include <string.h> 131 #include <stdio.h> 132 133 #include "pcap-int.h" 134 135 #include "diag-control.h" 136 137 #include "gencode.h" 138 #include <pcap/namedb.h> 139 #include "nametoaddr.h" 140 141 #include "thread-local.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 char *off, *cpy; 474 int save_proto; 475 476 if ((cpy = strdup(name)) == NULL) 477 return 0; 478 479 if ((off = strchr(cpy, '-')) == NULL) { 480 free(cpy); 481 return 0; 482 } 483 484 *off = '\0'; 485 486 if (pcap_nametoport(cpy, port1, proto) == 0) { 487 free(cpy); 488 return 0; 489 } 490 save_proto = *proto; 491 492 if (pcap_nametoport(off + 1, port2, proto) == 0) { 493 free(cpy); 494 return 0; 495 } 496 free(cpy); 497 498 if (*proto != save_proto) 499 *proto = PROTO_UNDEF; 500 501 return 1; 502 } 503 504 /* 505 * XXX - not guaranteed to be thread-safe! See below for platforms 506 * on which it is thread-safe and on which it isn't. 507 */ 508 int 509 pcap_nametoproto(const char *str) 510 { 511 struct protoent *p; 512 #if defined(HAVE_LINUX_GETNETBYNAME_R) 513 /* 514 * We have Linux's reentrant getprotobyname_r(). 515 */ 516 struct protoent result_buf; 517 char buf[1024]; /* arbitrary size */ 518 int err; 519 520 err = getprotobyname_r(str, &result_buf, buf, sizeof buf, &p); 521 if (err != 0) { 522 /* 523 * XXX - dynamically allocate the buffer, and make it 524 * bigger if we get ERANGE back? 525 */ 526 return 0; 527 } 528 #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) 529 /* 530 * We have Solaris's and IRIX's reentrant getprotobyname_r(). 531 */ 532 struct protoent result_buf; 533 char buf[1024]; /* arbitrary size */ 534 535 p = getprotobyname_r(str, &result_buf, buf, (int)sizeof buf); 536 #elif defined(HAVE_AIX_GETNETBYNAME_R) 537 /* 538 * We have AIX's reentrant getprotobyname_r(). 539 */ 540 struct protoent result_buf; 541 struct protoent_data proto_data; 542 543 if (getprotobyname_r(str, &result_buf, &proto_data) == -1) 544 p = NULL; 545 else 546 p = &result_buf; 547 #else 548 /* 549 * We don't have any getprotobyname_r(); either we have a 550 * getprotobyname() that uses thread-specific data, in which 551 * case we're thread-safe (sufficiently recent FreeBSD, 552 * sufficiently recent Darwin-based OS, sufficiently recent 553 * HP-UX, sufficiently recent Tru64 UNIX, Windows), or we have 554 * the traditional getprotobyname() (everything else, including 555 * current NetBSD and OpenBSD), in which case we're not 556 * thread-safe. 557 */ 558 p = getprotobyname(str); 559 #endif 560 if (p != 0) 561 return p->p_proto; 562 else 563 return PROTO_UNDEF; 564 } 565 566 #include "ethertype.h" 567 568 struct eproto { 569 const char *s; 570 u_short p; 571 }; 572 573 /* 574 * Static data base of ether protocol types. 575 * tcpdump used to import this, and it's declared as an export on 576 * Debian, at least, so make it a public symbol, even though we 577 * don't officially export it by declaring it in a header file. 578 * (Programs *should* do this themselves, as tcpdump now does.) 579 * 580 * We declare it here, right before defining it, to squelch any 581 * warnings we might get from compilers about the lack of a 582 * declaration. 583 */ 584 PCAP_API struct eproto eproto_db[]; 585 PCAP_API_DEF struct eproto eproto_db[] = { 586 { "aarp", ETHERTYPE_AARP }, 587 { "arp", ETHERTYPE_ARP }, 588 { "atalk", ETHERTYPE_ATALK }, 589 { "decnet", ETHERTYPE_DN }, 590 { "ip", ETHERTYPE_IP }, 591 #ifdef INET6 592 { "ip6", ETHERTYPE_IPV6 }, 593 #endif 594 { "lat", ETHERTYPE_LAT }, 595 { "loopback", ETHERTYPE_LOOPBACK }, 596 { "mopdl", ETHERTYPE_MOPDL }, 597 { "moprc", ETHERTYPE_MOPRC }, 598 { "rarp", ETHERTYPE_REVARP }, 599 { "sca", ETHERTYPE_SCA }, 600 { (char *)0, 0 } 601 }; 602 603 int 604 pcap_nametoeproto(const char *s) 605 { 606 struct eproto *p = eproto_db; 607 608 while (p->s != 0) { 609 if (strcmp(p->s, s) == 0) 610 return p->p; 611 p += 1; 612 } 613 return PROTO_UNDEF; 614 } 615 616 #include "llc.h" 617 618 /* Static data base of LLC values. */ 619 static struct eproto llc_db[] = { 620 { "iso", LLCSAP_ISONS }, 621 { "stp", LLCSAP_8021D }, 622 { "ipx", LLCSAP_IPX }, 623 { "netbeui", LLCSAP_NETBEUI }, 624 { (char *)0, 0 } 625 }; 626 627 int 628 pcap_nametollc(const char *s) 629 { 630 struct eproto *p = llc_db; 631 632 while (p->s != 0) { 633 if (strcmp(p->s, s) == 0) 634 return p->p; 635 p += 1; 636 } 637 return PROTO_UNDEF; 638 } 639 640 /* Hex digit to 8-bit unsigned integer. */ 641 static inline u_char 642 xdtoi(u_char c) 643 { 644 if (c >= '0' && c <= '9') 645 return (u_char)(c - '0'); 646 else if (c >= 'a' && c <= 'f') 647 return (u_char)(c - 'a' + 10); 648 else 649 return (u_char)(c - 'A' + 10); 650 } 651 652 int 653 __pcap_atoin(const char *s, bpf_u_int32 *addr) 654 { 655 u_int n; 656 int len; 657 658 *addr = 0; 659 len = 0; 660 for (;;) { 661 n = 0; 662 while (*s && *s != '.') { 663 if (n > 25) { 664 /* The result will be > 255 */ 665 return -1; 666 } 667 n = n * 10 + *s++ - '0'; 668 } 669 if (n > 255) 670 return -1; 671 *addr <<= 8; 672 *addr |= n & 0xff; 673 len += 8; 674 if (*s == '\0') 675 return len; 676 ++s; 677 } 678 /* NOTREACHED */ 679 } 680 681 int 682 __pcap_atodn(const char *s, bpf_u_int32 *addr) 683 { 684 #define AREASHIFT 10 685 #define AREAMASK 0176000 686 #define NODEMASK 01777 687 688 u_int node, area; 689 690 if (sscanf(s, "%d.%d", &area, &node) != 2) 691 return(0); 692 693 *addr = (area << AREASHIFT) & AREAMASK; 694 *addr |= (node & NODEMASK); 695 696 return(32); 697 } 698 699 /* 700 * Convert 's', which can have the one of the forms: 701 * 702 * "xx:xx:xx:xx:xx:xx" 703 * "xx.xx.xx.xx.xx.xx" 704 * "xx-xx-xx-xx-xx-xx" 705 * "xxxx.xxxx.xxxx" 706 * "xxxxxxxxxxxx" 707 * 708 * (or various mixes of ':', '.', and '-') into a new 709 * ethernet address. Assumes 's' is well formed. 710 */ 711 u_char * 712 pcap_ether_aton(const char *s) 713 { 714 register u_char *ep, *e; 715 register u_char d; 716 717 e = ep = (u_char *)malloc(6); 718 if (e == NULL) 719 return (NULL); 720 721 while (*s) { 722 if (*s == ':' || *s == '.' || *s == '-') 723 s += 1; 724 d = xdtoi(*s++); 725 if (PCAP_ISXDIGIT(*s)) { 726 d <<= 4; 727 d |= xdtoi(*s++); 728 } 729 *ep++ = d; 730 } 731 732 return (e); 733 } 734 735 #ifndef HAVE_ETHER_HOSTTON 736 /* 737 * Roll our own. 738 * 739 * This should be thread-safe, as we define the static variables 740 * we use to be thread-local, and as pcap_next_etherent() does so 741 * as well. 742 */ 743 u_char * 744 pcap_ether_hostton(const char *name) 745 { 746 register struct pcap_etherent *ep; 747 register u_char *ap; 748 static thread_local FILE *fp = NULL; 749 static thread_local int init = 0; 750 751 if (!init) { 752 fp = fopen(PCAP_ETHERS_FILE, "r"); 753 ++init; 754 if (fp == NULL) 755 return (NULL); 756 } else if (fp == NULL) 757 return (NULL); 758 else 759 rewind(fp); 760 761 while ((ep = pcap_next_etherent(fp)) != NULL) { 762 if (strcmp(ep->name, name) == 0) { 763 ap = (u_char *)malloc(6); 764 if (ap != NULL) { 765 memcpy(ap, ep->addr, 6); 766 return (ap); 767 } 768 break; 769 } 770 } 771 return (NULL); 772 } 773 #else 774 /* 775 * Use the OS-supplied routine. 776 * This *should* be thread-safe; the API doesn't have a static buffer. 777 */ 778 u_char * 779 pcap_ether_hostton(const char *name) 780 { 781 register u_char *ap; 782 u_char a[6]; 783 char namebuf[1024]; 784 785 /* 786 * In AIX 7.1 and 7.2: int ether_hostton(char *, struct ether_addr *); 787 */ 788 pcapint_strlcpy(namebuf, name, sizeof(namebuf)); 789 ap = NULL; 790 if (ether_hostton(namebuf, (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