1 /* 2 * Copyright (c) 1993, 1994, 1995, 1996, 1997 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 * This code contributed by Atanu Ghosh (atanu@cs.ucl.ac.uk), 22 * University College London, and subsequently modified by 23 * Guy Harris (guy@alum.mit.edu), Mark Pizzolato 24 * <List-tcpdump-workers@subscriptions.pizzolato.net>, 25 * Mark C. Brown (mbrown@hp.com), and Sagun Shakya <Sagun.Shakya@Sun.COM>. 26 */ 27 28 /* 29 * Packet capture routine for DLPI under SunOS 5, HP-UX 9/10/11, and AIX. 30 * 31 * Notes: 32 * 33 * - The DLIOCRAW ioctl() is specific to SunOS. 34 * 35 * - There is a bug in bufmod(7) such that setting the snapshot 36 * length results in data being left of the front of the packet. 37 * 38 * - It might be desirable to use pfmod(7) to filter packets in the 39 * kernel when possible. 40 * 41 * - An older version of the HP-UX DLPI Programmer's Guide, which 42 * I think was advertised as the 10.20 version, used to be available 43 * at 44 * 45 * http://docs.hp.com/hpux/onlinedocs/B2355-90093/B2355-90093.html 46 * 47 * but is no longer available; it can still be found at 48 * 49 * http://h21007.www2.hp.com/dspp/files/unprotected/Drivers/Docs/Refs/B2355-90093.pdf 50 * 51 * in PDF form. 52 * 53 * - The HP-UX 10.x, 11.0, and 11i v1.6 version of the HP-UX DLPI 54 * Programmer's Guide, which I think was once advertised as the 55 * 11.00 version is available at 56 * 57 * http://docs.hp.com/en/B2355-90139/index.html 58 * 59 * - The HP-UX 11i v2 version of the HP-UX DLPI Programmer's Guide 60 * is available at 61 * 62 * http://docs.hp.com/en/B2355-90871/index.html 63 * 64 * - All of the HP documents describe raw-mode services, which are 65 * what we use if DL_HP_RAWDLS is defined. XXX - we use __hpux 66 * in some places to test for HP-UX, but use DL_HP_RAWDLS in 67 * other places; do we support any versions of HP-UX without 68 * DL_HP_RAWDLS? 69 */ 70 71 #ifdef HAVE_CONFIG_H 72 #include <config.h> 73 #endif 74 75 #include <sys/types.h> 76 #include <sys/time.h> 77 #ifdef HAVE_SYS_BUFMOD_H 78 #include <sys/bufmod.h> 79 #endif 80 #include <sys/dlpi.h> 81 #ifdef HAVE_SYS_DLPI_EXT_H 82 #include <sys/dlpi_ext.h> 83 #endif 84 #ifdef HAVE_HPUX9 85 #include <sys/socket.h> 86 #endif 87 #ifdef DL_HP_PPA_REQ 88 #include <sys/stat.h> 89 #endif 90 #include <sys/stream.h> 91 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H) 92 #include <sys/systeminfo.h> 93 #endif 94 95 #ifdef HAVE_HPUX9 96 #include <net/if.h> 97 #endif 98 99 #ifdef HAVE_HPUX9 100 #include <nlist.h> 101 #endif 102 #include <errno.h> 103 #include <fcntl.h> 104 #include <memory.h> 105 #include <stdio.h> 106 #include <stdlib.h> 107 #include <string.h> 108 #include <stropts.h> 109 #include <unistd.h> 110 #include <limits.h> 111 112 #include "pcap-int.h" 113 #include "dlpisubs.h" 114 115 #ifdef HAVE_OS_PROTO_H 116 #include "os-proto.h" 117 #endif 118 119 #if defined(__hpux) 120 /* 121 * HP-UX has a /dev/dlpi device; you open it and set the PPA of the actual 122 * network device you want. 123 */ 124 #define HAVE_DEV_DLPI 125 #elif defined(_AIX) 126 /* 127 * AIX has a /dev/dlpi directory, with devices named after the interfaces 128 * underneath it. 129 */ 130 #define PCAP_DEV_PREFIX "/dev/dlpi" 131 #elif defined(HAVE_SOLARIS) 132 /* 133 * Solaris has devices named after the interfaces underneath /dev. 134 */ 135 #define PCAP_DEV_PREFIX "/dev" 136 #endif 137 138 #define MAXDLBUF 8192 139 140 /* Forwards */ 141 static char *split_dname(char *, u_int *, char *); 142 static int dl_doattach(int, int, char *); 143 #ifdef DL_HP_RAWDLS 144 static int dl_dohpuxbind(int, char *); 145 #endif 146 static int dlpromiscon(pcap_t *, bpf_u_int32); 147 static int dlbindreq(int, bpf_u_int32, char *); 148 static int dlbindack(int, char *, char *, int *); 149 static int dlokack(int, const char *, char *, char *, int *); 150 static int dlinforeq(int, char *); 151 static int dlinfoack(int, char *, char *); 152 153 #ifdef HAVE_DL_PASSIVE_REQ_T 154 static void dlpassive(int, char *); 155 #endif 156 157 #ifdef DL_HP_RAWDLS 158 static int dlrawdatareq(int, const u_char *, int); 159 #endif 160 static int recv_ack(int, int, const char *, char *, char *, int *); 161 static char *dlstrerror(char *, size_t, bpf_u_int32); 162 static char *dlprim(char *, size_t, bpf_u_int32); 163 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H) 164 #define GET_RELEASE_BUFSIZE 32 165 static void get_release(char *, size_t, bpf_u_int32 *, bpf_u_int32 *, 166 bpf_u_int32 *); 167 #endif 168 static int send_request(int, char *, int, char *, char *); 169 #ifdef HAVE_HPUX9 170 static int dlpi_kread(int, off_t, void *, u_int, char *); 171 #endif 172 #ifdef HAVE_DEV_DLPI 173 static int get_dlpi_ppa(int, const char *, u_int, u_int *, char *); 174 #endif 175 176 /* 177 * Cast a buffer to "union DL_primitives" without provoking warnings 178 * from the compiler. 179 */ 180 #define MAKE_DL_PRIMITIVES(ptr) ((union DL_primitives *)(void *)(ptr)) 181 182 static int 183 pcap_read_dlpi(pcap_t *p, int cnt, pcap_handler callback, u_char *user) 184 { 185 int cc; 186 u_char *bp; 187 int flags; 188 bpf_u_int32 ctlbuf[MAXDLBUF]; 189 struct strbuf ctl = { 190 MAXDLBUF, 191 0, 192 (char *)ctlbuf 193 }; 194 struct strbuf data; 195 196 flags = 0; 197 cc = p->cc; 198 if (cc == 0) { 199 data.buf = (char *)p->buffer + p->offset; 200 data.maxlen = p->bufsize; 201 data.len = 0; 202 do { 203 /* 204 * Has "pcap_breakloop()" been called? 205 */ 206 if (p->break_loop) { 207 /* 208 * Yes - clear the flag that indicates 209 * that it has, and return -2 to 210 * indicate that we were told to 211 * break out of the loop. 212 */ 213 p->break_loop = 0; 214 return (-2); 215 } 216 /* 217 * XXX - check for the DLPI primitive, which 218 * would be DL_HP_RAWDATA_IND on HP-UX 219 * if we're in raw mode? 220 */ 221 ctl.buf = (char *)ctlbuf; 222 ctl.maxlen = MAXDLBUF; 223 ctl.len = 0; 224 if (getmsg(p->fd, &ctl, &data, &flags) < 0) { 225 /* Don't choke when we get ptraced */ 226 switch (errno) { 227 228 case EINTR: 229 cc = 0; 230 continue; 231 232 case EAGAIN: 233 return (0); 234 } 235 pcap_fmt_errmsg_for_errno(p->errbuf, 236 sizeof(p->errbuf), errno, "getmsg"); 237 return (-1); 238 } 239 cc = data.len; 240 } while (cc == 0); 241 bp = (u_char *)p->buffer + p->offset; 242 } else 243 bp = p->bp; 244 245 return (pcap_process_pkts(p, callback, user, cnt, bp, cc)); 246 } 247 248 static int 249 pcap_inject_dlpi(pcap_t *p, const void *buf, int size) 250 { 251 #ifdef DL_HP_RAWDLS 252 struct pcap_dlpi *pd = p->priv; 253 #endif 254 int ret; 255 256 #if defined(DLIOCRAW) 257 ret = write(p->fd, buf, size); 258 if (ret == -1) { 259 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 260 errno, "send"); 261 return (-1); 262 } 263 #elif defined(DL_HP_RAWDLS) 264 if (pd->send_fd < 0) { 265 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, 266 "send: Output FD couldn't be opened"); 267 return (-1); 268 } 269 ret = dlrawdatareq(pd->send_fd, buf, size); 270 if (ret == -1) { 271 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 272 errno, "send"); 273 return (-1); 274 } 275 /* 276 * putmsg() returns either 0 or -1; it doesn't indicate how 277 * many bytes were written (presumably they were all written 278 * or none of them were written). OpenBSD's pcap_inject() 279 * returns the number of bytes written, so, for API compatibility, 280 * we return the number of bytes we were told to write. 281 */ 282 ret = size; 283 #else /* no raw mode */ 284 /* 285 * XXX - this is a pain, because you might have to extract 286 * the address from the packet and use it in a DL_UNITDATA_REQ 287 * request. That would be dependent on the link-layer type. 288 * 289 * I also don't know what SAP you'd have to bind the descriptor 290 * to, or whether you'd need separate "receive" and "send" FDs, 291 * nor do I know whether you'd need different bindings for 292 * D/I/X Ethernet and 802.3, or for {FDDI,Token Ring} plus 293 * 802.2 and {FDDI,Token Ring} plus 802.2 plus SNAP. 294 * 295 * So, for now, we just return a "you can't send" indication, 296 * and leave it up to somebody with a DLPI-based system lacking 297 * both DLIOCRAW and DL_HP_RAWDLS to supply code to implement 298 * packet transmission on that system. If they do, they should 299 * send it to us - but should not send us code that assumes 300 * Ethernet; if the code doesn't work on non-Ethernet interfaces, 301 * it should check "p->linktype" and reject the send request if 302 * it's anything other than DLT_EN10MB. 303 */ 304 pcap_strlcpy(p->errbuf, "send: Not supported on this version of this OS", 305 PCAP_ERRBUF_SIZE); 306 ret = -1; 307 #endif /* raw mode */ 308 return (ret); 309 } 310 311 #ifndef DL_IPATM 312 #define DL_IPATM 0x12 /* ATM Classical IP interface */ 313 #endif 314 315 #ifdef HAVE_SOLARIS 316 /* 317 * For SunATM. 318 */ 319 #ifndef A_GET_UNITS 320 #define A_GET_UNITS (('A'<<8)|118) 321 #endif /* A_GET_UNITS */ 322 #ifndef A_PROMISCON_REQ 323 #define A_PROMISCON_REQ (('A'<<8)|121) 324 #endif /* A_PROMISCON_REQ */ 325 #endif /* HAVE_SOLARIS */ 326 327 static void 328 pcap_cleanup_dlpi(pcap_t *p) 329 { 330 #ifdef DL_HP_RAWDLS 331 struct pcap_dlpi *pd = p->priv; 332 333 if (pd->send_fd >= 0) { 334 close(pd->send_fd); 335 pd->send_fd = -1; 336 } 337 #endif 338 pcap_cleanup_live_common(p); 339 } 340 341 static int 342 open_dlpi_device(const char *name, u_int *ppa, char *errbuf) 343 { 344 int status; 345 char dname[100]; 346 char *cp; 347 int fd; 348 #ifdef HAVE_DEV_DLPI 349 u_int unit; 350 #else 351 char dname2[100]; 352 #endif 353 354 #ifdef HAVE_DEV_DLPI 355 /* 356 ** Remove any "/dev/" on the front of the device. 357 */ 358 cp = strrchr(name, '/'); 359 if (cp == NULL) 360 pcap_strlcpy(dname, name, sizeof(dname)); 361 else 362 pcap_strlcpy(dname, cp + 1, sizeof(dname)); 363 364 /* 365 * Split the device name into a device type name and a unit number; 366 * chop off the unit number, so "dname" is just a device type name. 367 */ 368 cp = split_dname(dname, &unit, errbuf); 369 if (cp == NULL) { 370 /* 371 * split_dname() has filled in the error message. 372 */ 373 return (PCAP_ERROR_NO_SUCH_DEVICE); 374 } 375 *cp = '\0'; 376 377 /* 378 * Use "/dev/dlpi" as the device. 379 * 380 * XXX - HP's DLPI Programmer's Guide for HP-UX 11.00 says that 381 * the "dl_mjr_num" field is for the "major number of interface 382 * driver"; that's the major of "/dev/dlpi" on the system on 383 * which I tried this, but there may be DLPI devices that 384 * use a different driver, in which case we may need to 385 * search "/dev" for the appropriate device with that major 386 * device number, rather than hardwiring "/dev/dlpi". 387 */ 388 cp = "/dev/dlpi"; 389 if ((fd = open(cp, O_RDWR)) < 0) { 390 if (errno == EPERM || errno == EACCES) { 391 status = PCAP_ERROR_PERM_DENIED; 392 snprintf(errbuf, PCAP_ERRBUF_SIZE, 393 "Attempt to open %s failed with %s - root privilege may be required", 394 cp, (errno == EPERM) ? "EPERM" : "EACCES"); 395 } else { 396 status = PCAP_ERROR; 397 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, 398 errno, "Attempt to open %s failed", cp); 399 } 400 return (status); 401 } 402 403 /* 404 * Get a table of all PPAs for that device, and search that 405 * table for the specified device type name and unit number. 406 */ 407 status = get_dlpi_ppa(fd, dname, unit, ppa, errbuf); 408 if (status < 0) { 409 close(fd); 410 return (status); 411 } 412 #else 413 /* 414 * If the device name begins with "/", assume it begins with 415 * the pathname of the directory containing the device to open; 416 * otherwise, concatenate the device directory name and the 417 * device name. 418 */ 419 if (*name == '/') 420 pcap_strlcpy(dname, name, sizeof(dname)); 421 else 422 snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX, 423 name); 424 425 /* 426 * Get the unit number, and a pointer to the end of the device 427 * type name. 428 */ 429 cp = split_dname(dname, ppa, errbuf); 430 if (cp == NULL) { 431 /* 432 * split_dname() has filled in the error message. 433 */ 434 return (PCAP_ERROR_NO_SUCH_DEVICE); 435 } 436 437 /* 438 * Make a copy of the device pathname, and then remove the unit 439 * number from the device pathname. 440 */ 441 pcap_strlcpy(dname2, dname, sizeof(dname)); 442 *cp = '\0'; 443 444 /* Try device without unit number */ 445 if ((fd = open(dname, O_RDWR)) < 0) { 446 if (errno != ENOENT) { 447 if (errno == EPERM || errno == EACCES) { 448 status = PCAP_ERROR_PERM_DENIED; 449 snprintf(errbuf, PCAP_ERRBUF_SIZE, 450 "Attempt to open %s failed with %s - root privilege may be required", 451 dname, 452 (errno == EPERM) ? "EPERM" : "EACCES"); 453 } else { 454 status = PCAP_ERROR; 455 pcap_fmt_errmsg_for_errno(errbuf, 456 PCAP_ERRBUF_SIZE, errno, 457 "Attempt to open %s failed", dname); 458 } 459 return (status); 460 } 461 462 /* Try again with unit number */ 463 if ((fd = open(dname2, O_RDWR)) < 0) { 464 if (errno == ENOENT) { 465 status = PCAP_ERROR_NO_SUCH_DEVICE; 466 467 /* 468 * We provide an error message even 469 * for this error, for diagnostic 470 * purposes (so that, for example, 471 * the app can show the message if the 472 * user requests it). 473 * 474 * In it, we just report "No DLPI device 475 * found" with the device name, so people 476 * don't get confused and think, for example, 477 * that if they can't capture on "lo0" 478 * on Solaris prior to Solaris 11 the fix 479 * is to change libpcap (or the application 480 * that uses it) to look for something other 481 * than "/dev/lo0", as the fix is to use 482 * Solaris 11 or some operating system 483 * other than Solaris - you just *can't* 484 * capture on a loopback interface 485 * on Solaris prior to Solaris 11, the lack 486 * of a DLPI device for the loopback 487 * interface is just a symptom of that 488 * inability. 489 */ 490 snprintf(errbuf, PCAP_ERRBUF_SIZE, 491 "%s: No DLPI device found", name); 492 } else { 493 if (errno == EPERM || errno == EACCES) { 494 status = PCAP_ERROR_PERM_DENIED; 495 snprintf(errbuf, PCAP_ERRBUF_SIZE, 496 "Attempt to open %s failed with %s - root privilege may be required", 497 dname2, 498 (errno == EPERM) ? "EPERM" : "EACCES"); 499 } else { 500 status = PCAP_ERROR; 501 pcap_fmt_errmsg_for_errno(errbuf, 502 PCAP_ERRBUF_SIZE, errno, 503 "Attempt to open %s failed", 504 dname2); 505 } 506 } 507 return (status); 508 } 509 /* XXX Assume unit zero */ 510 *ppa = 0; 511 } 512 #endif 513 return (fd); 514 } 515 516 static int 517 pcap_activate_dlpi(pcap_t *p) 518 { 519 #ifdef DL_HP_RAWDLS 520 struct pcap_dlpi *pd = p->priv; 521 #endif 522 int status = 0; 523 int retv; 524 u_int ppa; 525 #ifdef HAVE_SOLARIS 526 int isatm = 0; 527 #endif 528 register dl_info_ack_t *infop; 529 #ifdef HAVE_SYS_BUFMOD_H 530 bpf_u_int32 ss; 531 #ifdef HAVE_SOLARIS 532 char release[GET_RELEASE_BUFSIZE]; 533 bpf_u_int32 osmajor, osminor, osmicro; 534 #endif 535 #endif 536 bpf_u_int32 buf[MAXDLBUF]; 537 538 p->fd = open_dlpi_device(p->opt.device, &ppa, p->errbuf); 539 if (p->fd < 0) { 540 status = p->fd; 541 goto bad; 542 } 543 544 #ifdef DL_HP_RAWDLS 545 /* 546 * XXX - HP-UX 10.20 and 11.xx don't appear to support sending and 547 * receiving packets on the same descriptor - you need separate 548 * descriptors for sending and receiving, bound to different SAPs. 549 * 550 * If the open fails, we just leave -1 in "pd->send_fd" and reject 551 * attempts to send packets, just as if, in pcap-bpf.c, we fail 552 * to open the BPF device for reading and writing, we just try 553 * to open it for reading only and, if that succeeds, just let 554 * the send attempts fail. 555 */ 556 pd->send_fd = open("/dev/dlpi", O_RDWR); 557 #endif 558 559 /* 560 ** Attach if "style 2" provider 561 */ 562 if (dlinforeq(p->fd, p->errbuf) < 0 || 563 dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) { 564 status = PCAP_ERROR; 565 goto bad; 566 } 567 infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack; 568 #ifdef HAVE_SOLARIS 569 if (infop->dl_mac_type == DL_IPATM) 570 isatm = 1; 571 #endif 572 if (infop->dl_provider_style == DL_STYLE2) { 573 retv = dl_doattach(p->fd, ppa, p->errbuf); 574 if (retv < 0) { 575 status = retv; 576 goto bad; 577 } 578 #ifdef DL_HP_RAWDLS 579 if (pd->send_fd >= 0) { 580 retv = dl_doattach(pd->send_fd, ppa, p->errbuf); 581 if (retv < 0) { 582 status = retv; 583 goto bad; 584 } 585 } 586 #endif 587 } 588 589 if (p->opt.rfmon) { 590 /* 591 * This device exists, but we don't support monitor mode 592 * any platforms that support DLPI. 593 */ 594 status = PCAP_ERROR_RFMON_NOTSUP; 595 goto bad; 596 } 597 598 #ifdef HAVE_DL_PASSIVE_REQ_T 599 /* 600 * Enable Passive mode to be able to capture on aggregated link. 601 * Not supported in all Solaris versions. 602 */ 603 dlpassive(p->fd, p->errbuf); 604 #endif 605 /* 606 ** Bind (defer if using HP-UX 9 or HP-UX 10.20 or later, totally 607 ** skip if using SINIX) 608 */ 609 #if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20_OR_LATER) && !defined(sinix) 610 #ifdef _AIX 611 /* 612 ** AIX. 613 ** According to IBM's AIX Support Line, the dl_sap value 614 ** should not be less than 0x600 (1536) for standard Ethernet. 615 ** However, we seem to get DL_BADADDR - "DLSAP addr in improper 616 ** format or invalid" - errors if we use 1537 on the "tr0" 617 ** device, which, given that its name starts with "tr" and that 618 ** it's IBM, probably means a Token Ring device. (Perhaps we 619 ** need to use 1537 on "/dev/dlpi/en" because that device is for 620 ** D/I/X Ethernet, the "SAP" is actually an Ethernet type, and 621 ** it rejects invalid Ethernet types.) 622 ** 623 ** So if 1537 fails, we try 2, as Hyung Sik Yoon of IBM Korea 624 ** says that works on Token Ring (he says that 0 does *not* 625 ** work; perhaps that's considered an invalid LLC SAP value - I 626 ** assume the SAP value in a DLPI bind is an LLC SAP for network 627 ** types that use 802.2 LLC). 628 */ 629 if ((dlbindreq(p->fd, 1537, p->errbuf) < 0 && 630 dlbindreq(p->fd, 2, p->errbuf) < 0) || 631 dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) { 632 status = PCAP_ERROR; 633 goto bad; 634 } 635 #elif defined(DL_HP_RAWDLS) 636 /* 637 ** HP-UX 10.0x and 10.1x. 638 */ 639 if (dl_dohpuxbind(p->fd, p->errbuf) < 0) { 640 status = PCAP_ERROR; 641 goto bad; 642 } 643 if (pd->send_fd >= 0) { 644 /* 645 ** XXX - if this fails, just close send_fd and 646 ** set it to -1, so that you can't send but can 647 ** still receive? 648 */ 649 if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) { 650 status = PCAP_ERROR; 651 goto bad; 652 } 653 } 654 #else /* neither AIX nor HP-UX */ 655 /* 656 ** Not Sinix, and neither AIX nor HP-UX - Solaris, and any other 657 ** OS using DLPI. 658 **/ 659 if (dlbindreq(p->fd, 0, p->errbuf) < 0 || 660 dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) { 661 status = PCAP_ERROR; 662 goto bad; 663 } 664 #endif /* AIX vs. HP-UX vs. other */ 665 #endif /* !HP-UX 9 and !HP-UX 10.20 or later and !SINIX */ 666 667 /* 668 * Turn a negative snapshot value (invalid), a snapshot value of 669 * 0 (unspecified), or a value bigger than the normal maximum 670 * value, into the maximum allowed value. 671 * 672 * If some application really *needs* a bigger snapshot 673 * length, we should just increase MAXIMUM_SNAPLEN. 674 */ 675 if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN) 676 p->snapshot = MAXIMUM_SNAPLEN; 677 678 #ifdef HAVE_SOLARIS 679 if (isatm) { 680 /* 681 ** Have to turn on some special ATM promiscuous mode 682 ** for SunATM. 683 ** Do *NOT* turn regular promiscuous mode on; it doesn't 684 ** help, and may break things. 685 */ 686 if (strioctl(p->fd, A_PROMISCON_REQ, 0, NULL) < 0) { 687 status = PCAP_ERROR; 688 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 689 errno, "A_PROMISCON_REQ"); 690 goto bad; 691 } 692 } else 693 #endif 694 if (p->opt.promisc) { 695 /* 696 ** Enable promiscuous (not necessary on send FD) 697 */ 698 retv = dlpromiscon(p, DL_PROMISC_PHYS); 699 if (retv < 0) { 700 if (retv == PCAP_ERROR_PERM_DENIED) 701 status = PCAP_ERROR_PROMISC_PERM_DENIED; 702 else 703 status = retv; 704 goto bad; 705 } 706 707 /* 708 ** Try to enable multicast (you would have thought 709 ** promiscuous would be sufficient). (Skip if using 710 ** HP-UX or SINIX) (Not necessary on send FD) 711 */ 712 #if !defined(__hpux) && !defined(sinix) 713 retv = dlpromiscon(p, DL_PROMISC_MULTI); 714 if (retv < 0) 715 status = PCAP_WARNING; 716 #endif 717 } 718 /* 719 ** Try to enable SAP promiscuity (when not in promiscuous mode 720 ** when using HP-UX, when not doing SunATM on Solaris, and never 721 ** under SINIX) (Not necessary on send FD) 722 */ 723 #ifndef sinix 724 #if defined(__hpux) 725 /* HP-UX - only do this when not in promiscuous mode */ 726 if (!p->opt.promisc) { 727 #elif defined(HAVE_SOLARIS) 728 /* Solaris - don't do this on SunATM devices */ 729 if (!isatm) { 730 #else 731 /* Everything else (except for SINIX) - always do this */ 732 { 733 #endif 734 retv = dlpromiscon(p, DL_PROMISC_SAP); 735 if (retv < 0) { 736 if (p->opt.promisc) { 737 /* 738 * Not fatal, since the DL_PROMISC_PHYS mode 739 * worked. 740 * 741 * Report it as a warning, however. 742 */ 743 status = PCAP_WARNING; 744 } else { 745 /* 746 * Fatal. 747 */ 748 status = retv; 749 goto bad; 750 } 751 } 752 } 753 #endif /* sinix */ 754 755 /* 756 ** HP-UX 9, and HP-UX 10.20 or later, must bind after setting 757 ** promiscuous options. 758 */ 759 #if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20_OR_LATER) 760 if (dl_dohpuxbind(p->fd, p->errbuf) < 0) { 761 status = PCAP_ERROR; 762 goto bad; 763 } 764 /* 765 ** We don't set promiscuous mode on the send FD, but we'll defer 766 ** binding it anyway, just to keep the HP-UX 9/10.20 or later 767 ** code together. 768 */ 769 if (pd->send_fd >= 0) { 770 /* 771 ** XXX - if this fails, just close send_fd and 772 ** set it to -1, so that you can't send but can 773 ** still receive? 774 */ 775 if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) { 776 status = PCAP_ERROR; 777 goto bad; 778 } 779 } 780 #endif 781 782 /* 783 ** Determine link type 784 ** XXX - get SAP length and address length as well, for use 785 ** when sending packets. 786 */ 787 if (dlinforeq(p->fd, p->errbuf) < 0 || 788 dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) { 789 status = PCAP_ERROR; 790 goto bad; 791 } 792 793 infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack; 794 if (pcap_process_mactype(p, infop->dl_mac_type) != 0) { 795 status = PCAP_ERROR; 796 goto bad; 797 } 798 799 #ifdef DLIOCRAW 800 /* 801 ** This is a non standard SunOS hack to get the full raw link-layer 802 ** header. 803 */ 804 if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) { 805 status = PCAP_ERROR; 806 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 807 errno, "DLIOCRAW"); 808 goto bad; 809 } 810 #endif 811 812 #ifdef HAVE_SYS_BUFMOD_H 813 ss = p->snapshot; 814 815 /* 816 ** There is a bug in bufmod(7). When dealing with messages of 817 ** less than snaplen size it strips data from the beginning not 818 ** the end. 819 ** 820 ** This bug is fixed in 5.3.2. Also, there is a patch available. 821 ** Ask for bugid 1149065. 822 */ 823 #ifdef HAVE_SOLARIS 824 get_release(release, sizeof (release), &osmajor, &osminor, &osmicro); 825 if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) && 826 getenv("BUFMOD_FIXED") == NULL) { 827 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, 828 "WARNING: bufmod is broken in SunOS %s; ignoring snaplen.", 829 release); 830 ss = 0; 831 status = PCAP_WARNING; 832 } 833 #endif 834 835 /* Push and configure bufmod. */ 836 if (pcap_conf_bufmod(p, ss) != 0) { 837 status = PCAP_ERROR; 838 goto bad; 839 } 840 #endif 841 842 /* 843 ** As the last operation flush the read side. 844 */ 845 if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) { 846 status = PCAP_ERROR; 847 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 848 errno, "FLUSHR"); 849 goto bad; 850 } 851 852 /* Allocate data buffer. */ 853 if (pcap_alloc_databuf(p) != 0) { 854 status = PCAP_ERROR; 855 goto bad; 856 } 857 858 /* 859 * Success. 860 * 861 * "p->fd" is an FD for a STREAMS device, so "select()" and 862 * "poll()" should work on it. 863 */ 864 p->selectable_fd = p->fd; 865 866 p->read_op = pcap_read_dlpi; 867 p->inject_op = pcap_inject_dlpi; 868 p->setfilter_op = install_bpf_program; /* no kernel filtering */ 869 p->setdirection_op = NULL; /* Not implemented.*/ 870 p->set_datalink_op = NULL; /* can't change data link type */ 871 p->getnonblock_op = pcap_getnonblock_fd; 872 p->setnonblock_op = pcap_setnonblock_fd; 873 p->stats_op = pcap_stats_dlpi; 874 p->cleanup_op = pcap_cleanup_dlpi; 875 876 return (status); 877 bad: 878 pcap_cleanup_dlpi(p); 879 return (status); 880 } 881 882 /* 883 * Split a device name into a device type name and a unit number; 884 * return the a pointer to the beginning of the unit number, which 885 * is the end of the device type name, and set "*unitp" to the unit 886 * number. 887 * 888 * Returns NULL on error, and fills "ebuf" with an error message. 889 */ 890 static char * 891 split_dname(char *device, u_int *unitp, char *ebuf) 892 { 893 char *cp; 894 char *eos; 895 long unit; 896 897 /* 898 * Look for a number at the end of the device name string. 899 */ 900 cp = device + strlen(device) - 1; 901 if (*cp < '0' || *cp > '9') { 902 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s missing unit number", 903 device); 904 return (NULL); 905 } 906 907 /* Digits at end of string are unit number */ 908 while (cp-1 >= device && *(cp-1) >= '0' && *(cp-1) <= '9') 909 cp--; 910 911 errno = 0; 912 unit = strtol(cp, &eos, 10); 913 if (*eos != '\0') { 914 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s bad unit number", device); 915 return (NULL); 916 } 917 if (errno == ERANGE || unit > INT_MAX) { 918 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number too large", 919 device); 920 return (NULL); 921 } 922 if (unit < 0) { 923 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number is negative", 924 device); 925 return (NULL); 926 } 927 *unitp = (u_int)unit; 928 return (cp); 929 } 930 931 static int 932 dl_doattach(int fd, int ppa, char *ebuf) 933 { 934 dl_attach_req_t req; 935 bpf_u_int32 buf[MAXDLBUF]; 936 int err; 937 938 req.dl_primitive = DL_ATTACH_REQ; 939 req.dl_ppa = ppa; 940 if (send_request(fd, (char *)&req, sizeof(req), "attach", ebuf) < 0) 941 return (PCAP_ERROR); 942 943 err = dlokack(fd, "attach", (char *)buf, ebuf, NULL); 944 if (err < 0) 945 return (err); 946 return (0); 947 } 948 949 #ifdef DL_HP_RAWDLS 950 static int 951 dl_dohpuxbind(int fd, char *ebuf) 952 { 953 int hpsap; 954 int uerror; 955 bpf_u_int32 buf[MAXDLBUF]; 956 957 /* 958 * XXX - we start at 22 because we used to use only 22, but 959 * that was just because that was the value used in some 960 * sample code from HP. With what value *should* we start? 961 * Does it matter, given that we're enabling SAP promiscuity 962 * on the input FD? 963 */ 964 hpsap = 22; 965 for (;;) { 966 if (dlbindreq(fd, hpsap, ebuf) < 0) 967 return (-1); 968 if (dlbindack(fd, (char *)buf, ebuf, &uerror) >= 0) 969 break; 970 /* 971 * For any error other than a UNIX EBUSY, give up. 972 */ 973 if (uerror != EBUSY) { 974 /* 975 * dlbindack() has already filled in ebuf for 976 * this error. 977 */ 978 return (-1); 979 } 980 981 /* 982 * For EBUSY, try the next SAP value; that means that 983 * somebody else is using that SAP. Clear ebuf so 984 * that application doesn't report the "Device busy" 985 * error as a warning. 986 */ 987 *ebuf = '\0'; 988 hpsap++; 989 if (hpsap > 100) { 990 pcap_strlcpy(ebuf, 991 "All SAPs from 22 through 100 are in use", 992 PCAP_ERRBUF_SIZE); 993 return (-1); 994 } 995 } 996 return (0); 997 } 998 #endif 999 1000 #define STRINGIFY(n) #n 1001 1002 static int 1003 dlpromiscon(pcap_t *p, bpf_u_int32 level) 1004 { 1005 dl_promiscon_req_t req; 1006 bpf_u_int32 buf[MAXDLBUF]; 1007 int err; 1008 int uerror; 1009 1010 req.dl_primitive = DL_PROMISCON_REQ; 1011 req.dl_level = level; 1012 if (send_request(p->fd, (char *)&req, sizeof(req), "promiscon", 1013 p->errbuf) < 0) 1014 return (PCAP_ERROR); 1015 err = dlokack(p->fd, "promiscon" STRINGIFY(level), (char *)buf, 1016 p->errbuf, &uerror); 1017 if (err < 0) { 1018 if (err == PCAP_ERROR_PERM_DENIED) { 1019 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, 1020 "Attempt to set promiscuous mode failed with %s - root privilege may be required", 1021 (uerror == EPERM) ? "EPERM" : "EACCES"); 1022 err = PCAP_ERROR_PROMISC_PERM_DENIED; 1023 } 1024 return (err); 1025 } 1026 return (0); 1027 } 1028 1029 /* 1030 * Not all interfaces are DLPI interfaces, and thus not all interfaces 1031 * can be opened with DLPI (for example, the loopback interface is not 1032 * a DLPI interface on Solaris prior to Solaris 11), so try to open 1033 * the specified interface; return 0 if we fail with PCAP_ERROR_NO_SUCH_DEVICE 1034 * and 1 otherwise. 1035 */ 1036 static int 1037 is_dlpi_interface(const char *name) 1038 { 1039 int fd; 1040 u_int ppa; 1041 char errbuf[PCAP_ERRBUF_SIZE]; 1042 1043 fd = open_dlpi_device(name, &ppa, errbuf); 1044 if (fd < 0) { 1045 /* 1046 * Error - was it PCAP_ERROR_NO_SUCH_DEVICE? 1047 */ 1048 if (fd == PCAP_ERROR_NO_SUCH_DEVICE) { 1049 /* 1050 * Yes, so we can't open this because it's 1051 * not a DLPI interface. 1052 */ 1053 return (0); 1054 } 1055 /* 1056 * No, so, in the case where there's a single DLPI 1057 * device for all interfaces of this type ("style 1058 * 2" providers?), we don't know whether it's a DLPI 1059 * interface or not, as we didn't try an attach. 1060 * Say it is a DLPI device, so that the user can at 1061 * least try to open it and report the error (which 1062 * is probably "you don't have permission to open that 1063 * DLPI device"; reporting those interfaces means 1064 * users will ask "why am I getting a permissions error 1065 * when I try to capture" rather than "why am I not 1066 * seeing any interfaces", making the underlying problem 1067 * clearer). 1068 */ 1069 return (1); 1070 } 1071 1072 /* 1073 * Success. 1074 */ 1075 close(fd); 1076 return (1); 1077 } 1078 1079 static int 1080 get_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_) 1081 { 1082 /* 1083 * Nothing we can do other than mark loopback devices as "the 1084 * connected/disconnected status doesn't apply". 1085 * 1086 * XXX - on Solaris, can we do what the dladm command does, 1087 * i.e. get a connected/disconnected indication from a kstat? 1088 * (Note that you can also get the link speed, and possibly 1089 * other information, from a kstat as well.) 1090 */ 1091 if (*flags & PCAP_IF_LOOPBACK) { 1092 /* 1093 * Loopback devices aren't wireless, and "connected"/ 1094 * "disconnected" doesn't apply to them. 1095 */ 1096 *flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE; 1097 return (0); 1098 } 1099 return (0); 1100 } 1101 1102 int 1103 pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf) 1104 { 1105 #ifdef HAVE_SOLARIS 1106 int fd; 1107 union { 1108 u_int nunits; 1109 char pad[516]; /* XXX - must be at least 513; is 516 1110 in "atmgetunits" */ 1111 } buf; 1112 char baname[2+1+1]; 1113 u_int i; 1114 #endif 1115 1116 /* 1117 * Get the list of regular interfaces first. 1118 */ 1119 if (pcap_findalldevs_interfaces(devlistp, errbuf, is_dlpi_interface, 1120 get_if_flags) == -1) 1121 return (-1); /* failure */ 1122 1123 #ifdef HAVE_SOLARIS 1124 /* 1125 * We may have to do special magic to get ATM devices. 1126 */ 1127 if ((fd = open("/dev/ba", O_RDWR)) < 0) { 1128 /* 1129 * We couldn't open the "ba" device. 1130 * For now, just give up; perhaps we should 1131 * return an error if the problem is neither 1132 * a "that device doesn't exist" error (ENOENT, 1133 * ENXIO, etc.) or a "you're not allowed to do 1134 * that" error (EPERM, EACCES). 1135 */ 1136 return (0); 1137 } 1138 1139 if (strioctl(fd, A_GET_UNITS, sizeof(buf), (char *)&buf) < 0) { 1140 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, 1141 errno, "A_GET_UNITS"); 1142 return (-1); 1143 } 1144 for (i = 0; i < buf.nunits; i++) { 1145 snprintf(baname, sizeof baname, "ba%u", i); 1146 /* 1147 * XXX - is there a notion of "up" and "running"? 1148 * And is there a way to determine whether the 1149 * interface is plugged into a network? 1150 */ 1151 if (add_dev(devlistp, baname, 0, NULL, errbuf) == NULL) 1152 return (-1); 1153 } 1154 #endif 1155 1156 return (0); 1157 } 1158 1159 static int 1160 send_request(int fd, char *ptr, int len, char *what, char *ebuf) 1161 { 1162 struct strbuf ctl; 1163 int flags; 1164 1165 ctl.maxlen = 0; 1166 ctl.len = len; 1167 ctl.buf = ptr; 1168 1169 flags = 0; 1170 if (putmsg(fd, &ctl, (struct strbuf *) NULL, flags) < 0) { 1171 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1172 errno, "send_request: putmsg \"%s\"", what); 1173 return (-1); 1174 } 1175 return (0); 1176 } 1177 1178 static int 1179 recv_ack(int fd, int size, const char *what, char *bufp, char *ebuf, int *uerror) 1180 { 1181 union DL_primitives *dlp; 1182 struct strbuf ctl; 1183 int flags; 1184 char errmsgbuf[PCAP_ERRBUF_SIZE]; 1185 char dlprimbuf[64]; 1186 1187 /* 1188 * Clear out "*uerror", so it's only set for DL_ERROR_ACK/DL_SYSERR, 1189 * making that the only place where EBUSY is treated specially. 1190 */ 1191 if (uerror != NULL) 1192 *uerror = 0; 1193 1194 ctl.maxlen = MAXDLBUF; 1195 ctl.len = 0; 1196 ctl.buf = bufp; 1197 1198 flags = 0; 1199 if (getmsg(fd, &ctl, (struct strbuf*)NULL, &flags) < 0) { 1200 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1201 errno, "recv_ack: %s getmsg", what); 1202 return (PCAP_ERROR); 1203 } 1204 1205 dlp = MAKE_DL_PRIMITIVES(ctl.buf); 1206 switch (dlp->dl_primitive) { 1207 1208 case DL_INFO_ACK: 1209 case DL_BIND_ACK: 1210 case DL_OK_ACK: 1211 #ifdef DL_HP_PPA_ACK 1212 case DL_HP_PPA_ACK: 1213 #endif 1214 /* These are OK */ 1215 break; 1216 1217 case DL_ERROR_ACK: 1218 switch (dlp->error_ack.dl_errno) { 1219 1220 case DL_SYSERR: 1221 if (uerror != NULL) 1222 *uerror = dlp->error_ack.dl_unix_errno; 1223 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1224 dlp->error_ack.dl_unix_errno, 1225 "recv_ack: %s: UNIX error", what); 1226 if (dlp->error_ack.dl_unix_errno == EPERM || 1227 dlp->error_ack.dl_unix_errno == EACCES) 1228 return (PCAP_ERROR_PERM_DENIED); 1229 break; 1230 1231 default: 1232 /* 1233 * Neither EPERM nor EACCES. 1234 */ 1235 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1236 "recv_ack: %s: %s", what, 1237 dlstrerror(errmsgbuf, sizeof (errmsgbuf), dlp->error_ack.dl_errno)); 1238 if (dlp->error_ack.dl_errno == DL_BADPPA) 1239 return (PCAP_ERROR_NO_SUCH_DEVICE); 1240 else if (dlp->error_ack.dl_errno == DL_ACCESS) 1241 return (PCAP_ERROR_PERM_DENIED); 1242 break; 1243 } 1244 return (PCAP_ERROR); 1245 1246 default: 1247 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1248 "recv_ack: %s: Unexpected primitive ack %s", 1249 what, dlprim(dlprimbuf, sizeof (dlprimbuf), dlp->dl_primitive)); 1250 return (PCAP_ERROR); 1251 } 1252 1253 if (ctl.len < size) { 1254 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1255 "recv_ack: %s: Ack too small (%d < %d)", 1256 what, ctl.len, size); 1257 return (PCAP_ERROR); 1258 } 1259 return (ctl.len); 1260 } 1261 1262 static char * 1263 dlstrerror(char *errbuf, size_t errbufsize, bpf_u_int32 dl_errno) 1264 { 1265 switch (dl_errno) { 1266 1267 case DL_ACCESS: 1268 return ("Improper permissions for request"); 1269 1270 case DL_BADADDR: 1271 return ("DLSAP addr in improper format or invalid"); 1272 1273 case DL_BADCORR: 1274 return ("Seq number not from outstand DL_CONN_IND"); 1275 1276 case DL_BADDATA: 1277 return ("User data exceeded provider limit"); 1278 1279 case DL_BADPPA: 1280 #ifdef HAVE_DEV_DLPI 1281 /* 1282 * With a single "/dev/dlpi" device used for all 1283 * DLPI providers, PPAs have nothing to do with 1284 * unit numbers. 1285 */ 1286 return ("Specified PPA was invalid"); 1287 #else 1288 /* 1289 * We have separate devices for separate devices; 1290 * the PPA is just the unit number. 1291 */ 1292 return ("Specified PPA (device unit) was invalid"); 1293 #endif 1294 1295 case DL_BADPRIM: 1296 return ("Primitive received not known by provider"); 1297 1298 case DL_BADQOSPARAM: 1299 return ("QOS parameters contained invalid values"); 1300 1301 case DL_BADQOSTYPE: 1302 return ("QOS structure type is unknown/unsupported"); 1303 1304 case DL_BADSAP: 1305 return ("Bad LSAP selector"); 1306 1307 case DL_BADTOKEN: 1308 return ("Token used not an active stream"); 1309 1310 case DL_BOUND: 1311 return ("Attempted second bind with dl_max_conind"); 1312 1313 case DL_INITFAILED: 1314 return ("Physical link initialization failed"); 1315 1316 case DL_NOADDR: 1317 return ("Provider couldn't allocate alternate address"); 1318 1319 case DL_NOTINIT: 1320 return ("Physical link not initialized"); 1321 1322 case DL_OUTSTATE: 1323 return ("Primitive issued in improper state"); 1324 1325 case DL_SYSERR: 1326 return ("UNIX system error occurred"); 1327 1328 case DL_UNSUPPORTED: 1329 return ("Requested service not supplied by provider"); 1330 1331 case DL_UNDELIVERABLE: 1332 return ("Previous data unit could not be delivered"); 1333 1334 case DL_NOTSUPPORTED: 1335 return ("Primitive is known but not supported"); 1336 1337 case DL_TOOMANY: 1338 return ("Limit exceeded"); 1339 1340 case DL_NOTENAB: 1341 return ("Promiscuous mode not enabled"); 1342 1343 case DL_BUSY: 1344 return ("Other streams for PPA in post-attached"); 1345 1346 case DL_NOAUTO: 1347 return ("Automatic handling XID&TEST not supported"); 1348 1349 case DL_NOXIDAUTO: 1350 return ("Automatic handling of XID not supported"); 1351 1352 case DL_NOTESTAUTO: 1353 return ("Automatic handling of TEST not supported"); 1354 1355 case DL_XIDAUTO: 1356 return ("Automatic handling of XID response"); 1357 1358 case DL_TESTAUTO: 1359 return ("Automatic handling of TEST response"); 1360 1361 case DL_PENDING: 1362 return ("Pending outstanding connect indications"); 1363 1364 default: 1365 snprintf(errbuf, errbufsize, "Error %02x", dl_errno); 1366 return (errbuf); 1367 } 1368 } 1369 1370 static char * 1371 dlprim(char *primbuf, size_t primbufsize, bpf_u_int32 prim) 1372 { 1373 switch (prim) { 1374 1375 case DL_INFO_REQ: 1376 return ("DL_INFO_REQ"); 1377 1378 case DL_INFO_ACK: 1379 return ("DL_INFO_ACK"); 1380 1381 case DL_ATTACH_REQ: 1382 return ("DL_ATTACH_REQ"); 1383 1384 case DL_DETACH_REQ: 1385 return ("DL_DETACH_REQ"); 1386 1387 case DL_BIND_REQ: 1388 return ("DL_BIND_REQ"); 1389 1390 case DL_BIND_ACK: 1391 return ("DL_BIND_ACK"); 1392 1393 case DL_UNBIND_REQ: 1394 return ("DL_UNBIND_REQ"); 1395 1396 case DL_OK_ACK: 1397 return ("DL_OK_ACK"); 1398 1399 case DL_ERROR_ACK: 1400 return ("DL_ERROR_ACK"); 1401 1402 case DL_SUBS_BIND_REQ: 1403 return ("DL_SUBS_BIND_REQ"); 1404 1405 case DL_SUBS_BIND_ACK: 1406 return ("DL_SUBS_BIND_ACK"); 1407 1408 case DL_UNITDATA_REQ: 1409 return ("DL_UNITDATA_REQ"); 1410 1411 case DL_UNITDATA_IND: 1412 return ("DL_UNITDATA_IND"); 1413 1414 case DL_UDERROR_IND: 1415 return ("DL_UDERROR_IND"); 1416 1417 case DL_UDQOS_REQ: 1418 return ("DL_UDQOS_REQ"); 1419 1420 case DL_CONNECT_REQ: 1421 return ("DL_CONNECT_REQ"); 1422 1423 case DL_CONNECT_IND: 1424 return ("DL_CONNECT_IND"); 1425 1426 case DL_CONNECT_RES: 1427 return ("DL_CONNECT_RES"); 1428 1429 case DL_CONNECT_CON: 1430 return ("DL_CONNECT_CON"); 1431 1432 case DL_TOKEN_REQ: 1433 return ("DL_TOKEN_REQ"); 1434 1435 case DL_TOKEN_ACK: 1436 return ("DL_TOKEN_ACK"); 1437 1438 case DL_DISCONNECT_REQ: 1439 return ("DL_DISCONNECT_REQ"); 1440 1441 case DL_DISCONNECT_IND: 1442 return ("DL_DISCONNECT_IND"); 1443 1444 case DL_RESET_REQ: 1445 return ("DL_RESET_REQ"); 1446 1447 case DL_RESET_IND: 1448 return ("DL_RESET_IND"); 1449 1450 case DL_RESET_RES: 1451 return ("DL_RESET_RES"); 1452 1453 case DL_RESET_CON: 1454 return ("DL_RESET_CON"); 1455 1456 default: 1457 snprintf(primbuf, primbufsize, "unknown primitive 0x%x", 1458 prim); 1459 return (primbuf); 1460 } 1461 } 1462 1463 static int 1464 dlbindreq(int fd, bpf_u_int32 sap, char *ebuf) 1465 { 1466 1467 dl_bind_req_t req; 1468 1469 memset((char *)&req, 0, sizeof(req)); 1470 req.dl_primitive = DL_BIND_REQ; 1471 /* XXX - what if neither of these are defined? */ 1472 #if defined(DL_HP_RAWDLS) 1473 req.dl_max_conind = 1; /* XXX magic number */ 1474 req.dl_service_mode = DL_HP_RAWDLS; 1475 #elif defined(DL_CLDLS) 1476 req.dl_service_mode = DL_CLDLS; 1477 #endif 1478 req.dl_sap = sap; 1479 1480 return (send_request(fd, (char *)&req, sizeof(req), "bind", ebuf)); 1481 } 1482 1483 static int 1484 dlbindack(int fd, char *bufp, char *ebuf, int *uerror) 1485 { 1486 1487 return (recv_ack(fd, DL_BIND_ACK_SIZE, "bind", bufp, ebuf, uerror)); 1488 } 1489 1490 static int 1491 dlokack(int fd, const char *what, char *bufp, char *ebuf, int *uerror) 1492 { 1493 1494 return (recv_ack(fd, DL_OK_ACK_SIZE, what, bufp, ebuf, uerror)); 1495 } 1496 1497 1498 static int 1499 dlinforeq(int fd, char *ebuf) 1500 { 1501 dl_info_req_t req; 1502 1503 req.dl_primitive = DL_INFO_REQ; 1504 1505 return (send_request(fd, (char *)&req, sizeof(req), "info", ebuf)); 1506 } 1507 1508 static int 1509 dlinfoack(int fd, char *bufp, char *ebuf) 1510 { 1511 1512 return (recv_ack(fd, DL_INFO_ACK_SIZE, "info", bufp, ebuf, NULL)); 1513 } 1514 1515 #ifdef HAVE_DL_PASSIVE_REQ_T 1516 /* 1517 * Enable DLPI passive mode. We do not care if this request fails, as this 1518 * indicates the underlying DLPI device does not support link aggregation. 1519 */ 1520 static void 1521 dlpassive(int fd, char *ebuf) 1522 { 1523 dl_passive_req_t req; 1524 bpf_u_int32 buf[MAXDLBUF]; 1525 1526 req.dl_primitive = DL_PASSIVE_REQ; 1527 1528 if (send_request(fd, (char *)&req, sizeof(req), "dlpassive", ebuf) == 0) 1529 (void) dlokack(fd, "dlpassive", (char *)buf, ebuf, NULL); 1530 } 1531 #endif 1532 1533 #ifdef DL_HP_RAWDLS 1534 /* 1535 * There's an ack *if* there's an error. 1536 */ 1537 static int 1538 dlrawdatareq(int fd, const u_char *datap, int datalen) 1539 { 1540 struct strbuf ctl, data; 1541 long buf[MAXDLBUF]; /* XXX - char? */ 1542 union DL_primitives *dlp; 1543 int dlen; 1544 1545 dlp = MAKE_DL_PRIMITIVES(buf); 1546 1547 dlp->dl_primitive = DL_HP_RAWDATA_REQ; 1548 dlen = DL_HP_RAWDATA_REQ_SIZE; 1549 1550 /* 1551 * HP's documentation doesn't appear to show us supplying any 1552 * address pointed to by the control part of the message. 1553 * I think that's what raw mode means - you just send the raw 1554 * packet, you don't specify where to send it to, as that's 1555 * implied by the destination address. 1556 */ 1557 ctl.maxlen = 0; 1558 ctl.len = dlen; 1559 ctl.buf = (void *)buf; 1560 1561 data.maxlen = 0; 1562 data.len = datalen; 1563 data.buf = (void *)datap; 1564 1565 return (putmsg(fd, &ctl, &data, 0)); 1566 } 1567 #endif /* DL_HP_RAWDLS */ 1568 1569 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H) 1570 static void 1571 get_release(char *buf, size_t bufsize, bpf_u_int32 *majorp, 1572 bpf_u_int32 *minorp, bpf_u_int32 *microp) 1573 { 1574 char *cp; 1575 1576 *majorp = 0; 1577 *minorp = 0; 1578 *microp = 0; 1579 if (sysinfo(SI_RELEASE, buf, bufsize) < 0) { 1580 pcap_strlcpy(buf, "?", bufsize); 1581 return; 1582 } 1583 cp = buf; 1584 if (!PCAP_ISDIGIT((unsigned char)*cp)) 1585 return; 1586 *majorp = strtol(cp, &cp, 10); 1587 if (*cp++ != '.') 1588 return; 1589 *minorp = strtol(cp, &cp, 10); 1590 if (*cp++ != '.') 1591 return; 1592 *microp = strtol(cp, &cp, 10); 1593 } 1594 #endif 1595 1596 #ifdef DL_HP_PPA_REQ 1597 /* 1598 * Under HP-UX 10 and HP-UX 11, we can ask for the ppa 1599 */ 1600 1601 1602 /* 1603 * Determine ppa number that specifies ifname. 1604 * 1605 * If the "dl_hp_ppa_info_t" doesn't have a "dl_module_id_1" member, 1606 * the code that's used here is the old code for HP-UX 10.x. 1607 * 1608 * However, HP-UX 10.20, at least, appears to have such a member 1609 * in its "dl_hp_ppa_info_t" structure, so the new code is used. 1610 * The new code didn't work on an old 10.20 system on which Rick 1611 * Jones of HP tried it, but with later patches installed, it 1612 * worked - it appears that the older system had those members but 1613 * didn't put anything in them, so, if the search by name fails, we 1614 * do the old search. 1615 * 1616 * Rick suggests that making sure your system is "up on the latest 1617 * lancommon/DLPI/driver patches" is probably a good idea; it'd fix 1618 * that problem, as well as allowing libpcap to see packets sent 1619 * from the system on which the libpcap application is being run. 1620 * (On 10.20, in addition to getting the latest patches, you need 1621 * to turn the kernel "lanc_outbound_promisc_flag" flag on with ADB; 1622 * a posting to "comp.sys.hp.hpux" at 1623 * 1624 * http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=558092266 1625 * 1626 * says that, to see the machine's outgoing traffic, you'd need to 1627 * apply the right patches to your system, and also set that variable 1628 * with: 1629 1630 echo 'lanc_outbound_promisc_flag/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem 1631 1632 * which could be put in, for example, "/sbin/init.d/lan". 1633 * 1634 * Setting the variable is not necessary on HP-UX 11.x. 1635 */ 1636 static int 1637 get_dlpi_ppa(register int fd, register const char *device, register u_int unit, 1638 u_int *ppa, register char *ebuf) 1639 { 1640 register dl_hp_ppa_ack_t *ap; 1641 register dl_hp_ppa_info_t *ipstart, *ip; 1642 register u_int i; 1643 char dname[100]; 1644 register u_long majdev; 1645 struct stat statbuf; 1646 dl_hp_ppa_req_t req; 1647 char buf[MAXDLBUF]; 1648 char *ppa_data_buf; 1649 dl_hp_ppa_ack_t *dlp; 1650 struct strbuf ctl; 1651 int flags; 1652 1653 memset((char *)&req, 0, sizeof(req)); 1654 req.dl_primitive = DL_HP_PPA_REQ; 1655 1656 memset((char *)buf, 0, sizeof(buf)); 1657 if (send_request(fd, (char *)&req, sizeof(req), "hpppa", ebuf) < 0) 1658 return (PCAP_ERROR); 1659 1660 ctl.maxlen = DL_HP_PPA_ACK_SIZE; 1661 ctl.len = 0; 1662 ctl.buf = (char *)buf; 1663 1664 flags = 0; 1665 /* 1666 * DLPI may return a big chunk of data for a DL_HP_PPA_REQ. The normal 1667 * recv_ack will fail because it set the maxlen to MAXDLBUF (8192) 1668 * which is NOT big enough for a DL_HP_PPA_REQ. 1669 * 1670 * This causes libpcap applications to fail on a system with HP-APA 1671 * installed. 1672 * 1673 * To figure out how big the returned data is, we first call getmsg 1674 * to get the small head and peek at the head to get the actual data 1675 * length, and then issue another getmsg to get the actual PPA data. 1676 */ 1677 /* get the head first */ 1678 if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) { 1679 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1680 errno, "get_dlpi_ppa: hpppa getmsg"); 1681 return (PCAP_ERROR); 1682 } 1683 if (ctl.len == -1) { 1684 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1685 "get_dlpi_ppa: hpppa getmsg: control buffer has no data"); 1686 return (PCAP_ERROR); 1687 } 1688 1689 dlp = (dl_hp_ppa_ack_t *)ctl.buf; 1690 if (dlp->dl_primitive != DL_HP_PPA_ACK) { 1691 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1692 "get_dlpi_ppa: hpppa unexpected primitive ack 0x%x", 1693 (bpf_u_int32)dlp->dl_primitive); 1694 return (PCAP_ERROR); 1695 } 1696 1697 if ((size_t)ctl.len < DL_HP_PPA_ACK_SIZE) { 1698 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1699 "get_dlpi_ppa: hpppa ack too small (%d < %lu)", 1700 ctl.len, (unsigned long)DL_HP_PPA_ACK_SIZE); 1701 return (PCAP_ERROR); 1702 } 1703 1704 /* allocate buffer */ 1705 if ((ppa_data_buf = (char *)malloc(dlp->dl_length)) == NULL) { 1706 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1707 errno, "get_dlpi_ppa: hpppa malloc"); 1708 return (PCAP_ERROR); 1709 } 1710 ctl.maxlen = dlp->dl_length; 1711 ctl.len = 0; 1712 ctl.buf = (char *)ppa_data_buf; 1713 /* get the data */ 1714 if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) { 1715 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1716 errno, "get_dlpi_ppa: hpppa getmsg"); 1717 free(ppa_data_buf); 1718 return (PCAP_ERROR); 1719 } 1720 if (ctl.len == -1) { 1721 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1722 "get_dlpi_ppa: hpppa getmsg: control buffer has no data"); 1723 return (PCAP_ERROR); 1724 } 1725 if ((u_int)ctl.len < dlp->dl_length) { 1726 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1727 "get_dlpi_ppa: hpppa ack too small (%d < %lu)", 1728 ctl.len, (unsigned long)dlp->dl_length); 1729 free(ppa_data_buf); 1730 return (PCAP_ERROR); 1731 } 1732 1733 ap = (dl_hp_ppa_ack_t *)buf; 1734 ipstart = (dl_hp_ppa_info_t *)ppa_data_buf; 1735 ip = ipstart; 1736 1737 #ifdef HAVE_DL_HP_PPA_INFO_T_DL_MODULE_ID_1 1738 /* 1739 * The "dl_hp_ppa_info_t" structure has a "dl_module_id_1" 1740 * member that should, in theory, contain the part of the 1741 * name for the device that comes before the unit number, 1742 * and should also have a "dl_module_id_2" member that may 1743 * contain an alternate name (e.g., I think Ethernet devices 1744 * have both "lan", for "lanN", and "snap", for "snapN", with 1745 * the former being for Ethernet packets and the latter being 1746 * for 802.3/802.2 packets). 1747 * 1748 * Search for the device that has the specified name and 1749 * instance number. 1750 */ 1751 for (i = 0; i < ap->dl_count; i++) { 1752 if ((strcmp((const char *)ip->dl_module_id_1, device) == 0 || 1753 strcmp((const char *)ip->dl_module_id_2, device) == 0) && 1754 ip->dl_instance_num == unit) 1755 break; 1756 1757 ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset); 1758 } 1759 #else 1760 /* 1761 * We don't have that member, so the search is impossible; make it 1762 * look as if the search failed. 1763 */ 1764 i = ap->dl_count; 1765 #endif 1766 1767 if (i == ap->dl_count) { 1768 /* 1769 * Well, we didn't, or can't, find the device by name. 1770 * 1771 * HP-UX 10.20, whilst it has "dl_module_id_1" and 1772 * "dl_module_id_2" fields in the "dl_hp_ppa_info_t", 1773 * doesn't seem to fill them in unless the system is 1774 * at a reasonably up-to-date patch level. 1775 * 1776 * Older HP-UX 10.x systems might not have those fields 1777 * at all. 1778 * 1779 * Therefore, we'll search for the entry with the major 1780 * device number of a device with the name "/dev/<dev><unit>", 1781 * if such a device exists, as the old code did. 1782 */ 1783 snprintf(dname, sizeof(dname), "/dev/%s%u", device, unit); 1784 if (stat(dname, &statbuf) < 0) { 1785 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1786 errno, "stat: %s", dname); 1787 return (PCAP_ERROR); 1788 } 1789 majdev = major(statbuf.st_rdev); 1790 1791 ip = ipstart; 1792 1793 for (i = 0; i < ap->dl_count; i++) { 1794 if (ip->dl_mjr_num == majdev && 1795 ip->dl_instance_num == unit) 1796 break; 1797 1798 ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset); 1799 } 1800 } 1801 if (i == ap->dl_count) { 1802 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1803 "can't find /dev/dlpi PPA for %s%u", device, unit); 1804 return (PCAP_ERROR_NO_SUCH_DEVICE); 1805 } 1806 if (ip->dl_hdw_state == HDW_DEAD) { 1807 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1808 "%s%d: hardware state: DOWN\n", device, unit); 1809 free(ppa_data_buf); 1810 return (PCAP_ERROR); 1811 } 1812 *ppa = ip->dl_ppa; 1813 free(ppa_data_buf); 1814 return (0); 1815 } 1816 #endif 1817 1818 #ifdef HAVE_HPUX9 1819 /* 1820 * Under HP-UX 9, there is no good way to determine the ppa. 1821 * So punt and read it from /dev/kmem. 1822 */ 1823 static struct nlist nl[] = { 1824 #define NL_IFNET 0 1825 { "ifnet" }, 1826 { "" } 1827 }; 1828 1829 static char path_vmunix[] = "/hp-ux"; 1830 1831 /* Determine ppa number that specifies ifname */ 1832 static int 1833 get_dlpi_ppa(register int fd, register const char *ifname, register u_int unit, 1834 u_int *ppa, register char *ebuf) 1835 { 1836 register const char *cp; 1837 register int kd; 1838 void *addr; 1839 struct ifnet ifnet; 1840 char if_name[sizeof(ifnet.if_name) + 1]; 1841 1842 cp = strrchr(ifname, '/'); 1843 if (cp != NULL) 1844 ifname = cp + 1; 1845 if (nlist(path_vmunix, &nl) < 0) { 1846 snprintf(ebuf, PCAP_ERRBUF_SIZE, "nlist %s failed", 1847 path_vmunix); 1848 return (PCAP_ERROR); 1849 } 1850 if (nl[NL_IFNET].n_value == 0) { 1851 snprintf(ebuf, PCAP_ERRBUF_SIZE, 1852 "couldn't find %s kernel symbol", 1853 nl[NL_IFNET].n_name); 1854 return (PCAP_ERROR); 1855 } 1856 kd = open("/dev/kmem", O_RDONLY); 1857 if (kd < 0) { 1858 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1859 errno, "kmem open"); 1860 return (PCAP_ERROR); 1861 } 1862 if (dlpi_kread(kd, nl[NL_IFNET].n_value, 1863 &addr, sizeof(addr), ebuf) < 0) { 1864 close(kd); 1865 return (PCAP_ERROR); 1866 } 1867 for (; addr != NULL; addr = ifnet.if_next) { 1868 if (dlpi_kread(kd, (off_t)addr, 1869 &ifnet, sizeof(ifnet), ebuf) < 0 || 1870 dlpi_kread(kd, (off_t)ifnet.if_name, 1871 if_name, sizeof(ifnet.if_name), ebuf) < 0) { 1872 (void)close(kd); 1873 return (PCAP_ERROR); 1874 } 1875 if_name[sizeof(ifnet.if_name)] = '\0'; 1876 if (strcmp(if_name, ifname) == 0 && ifnet.if_unit == unit) { 1877 *ppa = ifnet.if_index; 1878 return (0); 1879 } 1880 } 1881 1882 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't find %s", ifname); 1883 return (PCAP_ERROR_NO_SUCH_DEVICE); 1884 } 1885 1886 static int 1887 dlpi_kread(register int fd, register off_t addr, 1888 register void *buf, register u_int len, register char *ebuf) 1889 { 1890 register int cc; 1891 1892 if (lseek(fd, addr, SEEK_SET) < 0) { 1893 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1894 errno, "lseek"); 1895 return (-1); 1896 } 1897 cc = read(fd, buf, len); 1898 if (cc < 0) { 1899 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1900 errno, "read"); 1901 return (-1); 1902 } else if (cc != len) { 1903 snprintf(ebuf, PCAP_ERRBUF_SIZE, "short read (%d != %d)", cc, 1904 len); 1905 return (-1); 1906 } 1907 return (cc); 1908 } 1909 #endif 1910 1911 pcap_t * 1912 pcap_create_interface(const char *device _U_, char *ebuf) 1913 { 1914 pcap_t *p; 1915 #ifdef DL_HP_RAWDLS 1916 struct pcap_dlpi *pd; 1917 #endif 1918 1919 p = PCAP_CREATE_COMMON(ebuf, struct pcap_dlpi); 1920 if (p == NULL) 1921 return (NULL); 1922 1923 #ifdef DL_HP_RAWDLS 1924 pd = p->priv; 1925 pd->send_fd = -1; /* it hasn't been opened yet */ 1926 #endif 1927 1928 p->activate_op = pcap_activate_dlpi; 1929 return (p); 1930 } 1931 1932 /* 1933 * Libpcap version string. 1934 */ 1935 const char * 1936 pcap_lib_version(void) 1937 { 1938 return (PCAP_VERSION_STRING); 1939 } 1940