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1 office 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 #include <ctype.h>
100 #ifdef HAVE_HPUX9
101 #include <nlist.h>
102 #endif
103 #include <errno.h>
104 #include <fcntl.h>
105 #include <memory.h>
106 #include <stdio.h>
107 #include <stdlib.h>
108 #include <string.h>
109 #include <stropts.h>
110 #include <unistd.h>
111  
112 #ifdef HAVE_LIMITS_H
113 #include <limits.h>
114 #else
115 #define INT_MAX 2147483647
116 #endif
117  
118 #include "pcap-int.h"
119 #include "dlpisubs.h"
120  
121 #ifdef HAVE_OS_PROTO_H
122 #include "os-proto.h"
123 #endif
124  
125 #ifndef PCAP_DEV_PREFIX
126 #ifdef _AIX
127 #define PCAP_DEV_PREFIX "/dev/dlpi"
128 #else
129 #define PCAP_DEV_PREFIX "/dev"
130 #endif
131 #endif
132  
133 #define MAXDLBUF 8192
134  
135 /* Forwards */
136 static char *split_dname(char *, int *, char *);
137 static int dl_doattach(int, int, char *);
138 #ifdef DL_HP_RAWDLS
139 static int dl_dohpuxbind(int, char *);
140 #endif
141 static int dlpromiscon(pcap_t *, bpf_u_int32);
142 static int dlbindreq(int, bpf_u_int32, char *);
143 static int dlbindack(int, char *, char *, int *);
144 static int dlokack(int, const char *, char *, char *);
145 static int dlinforeq(int, char *);
146 static int dlinfoack(int, char *, char *);
147  
148 #ifdef HAVE_DLPI_PASSIVE
149 static void dlpassive(int, char *);
150 #endif
151  
152 #ifdef DL_HP_RAWDLS
153 static int dlrawdatareq(int, const u_char *, int);
154 #endif
155 static int recv_ack(int, int, const char *, char *, char *, int *);
156 static char *dlstrerror(bpf_u_int32);
157 static char *dlprim(bpf_u_int32);
158 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
159 static char *get_release(bpf_u_int32 *, bpf_u_int32 *, bpf_u_int32 *);
160 #endif
161 static int send_request(int, char *, int, char *, char *);
162 #ifdef HAVE_HPUX9
163 static int dlpi_kread(int, off_t, void *, u_int, char *);
164 #endif
165 #ifdef HAVE_DEV_DLPI
166 static int get_dlpi_ppa(int, const char *, int, char *);
167 #endif
168  
169 /* XXX Needed by HP-UX (at least) */
170 static bpf_u_int32 ctlbuf[MAXDLBUF];
171 static struct strbuf ctl = {
172 MAXDLBUF,
173 0,
174 (char *)ctlbuf
175 };
176  
177 /*
178 * Cast a buffer to "union DL_primitives" without provoking warnings
179 * from the compiler.
180 */
181 #define MAKE_DL_PRIMITIVES(ptr) ((union DL_primitives *)(void *)(ptr))
182  
183 static int
184 pcap_read_dlpi(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
185 {
186 int cc;
187 u_char *bp;
188 int flags;
189 struct strbuf data;
190  
191 flags = 0;
192 cc = p->cc;
193 if (cc == 0) {
194 data.buf = (char *)p->buffer + p->offset;
195 data.maxlen = p->bufsize;
196 data.len = 0;
197 do {
198 /*
199 * Has "pcap_breakloop()" been called?
200 */
201 if (p->break_loop) {
202 /*
203 * Yes - clear the flag that indicates
204 * that it has, and return -2 to
205 * indicate that we were told to
206 * break out of the loop.
207 */
208 p->break_loop = 0;
209 return (-2);
210 }
211 /*
212 * XXX - check for the DLPI primitive, which
213 * would be DL_HP_RAWDATA_IND on HP-UX
214 * if we're in raw mode?
215 */
216 if (getmsg(p->fd, &ctl, &data, &flags) < 0) {
217 /* Don't choke when we get ptraced */
218 switch (errno) {
219  
220 case EINTR:
221 cc = 0;
222 continue;
223  
224 case EAGAIN:
225 return (0);
226 }
227 strlcpy(p->errbuf, pcap_strerror(errno),
228 sizeof(p->errbuf));
229 return (-1);
230 }
231 cc = data.len;
232 } while (cc == 0);
233 bp = p->buffer + p->offset;
234 } else
235 bp = p->bp;
236  
237 return (pcap_process_pkts(p, callback, user, cnt, bp, cc));
238 }
239  
240 static int
241 pcap_inject_dlpi(pcap_t *p, const void *buf, size_t size)
242 {
243 #ifdef DL_HP_RAWDLS
244 struct pcap_dlpi *pd = p->priv;
245 #endif
246 int ret;
247  
248 #if defined(DLIOCRAW)
249 ret = write(p->fd, buf, size);
250 if (ret == -1) {
251 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send: %s",
252 pcap_strerror(errno));
253 return (-1);
254 }
255 #elif defined(DL_HP_RAWDLS)
256 if (pd->send_fd < 0) {
257 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
258 "send: Output FD couldn't be opened");
259 return (-1);
260 }
261 ret = dlrawdatareq(pd->send_fd, buf, size);
262 if (ret == -1) {
263 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send: %s",
264 pcap_strerror(errno));
265 return (-1);
266 }
267 /*
268 * putmsg() returns either 0 or -1; it doesn't indicate how
269 * many bytes were written (presumably they were all written
270 * or none of them were written). OpenBSD's pcap_inject()
271 * returns the number of bytes written, so, for API compatibility,
272 * we return the number of bytes we were told to write.
273 */
274 ret = size;
275 #else /* no raw mode */
276 /*
277 * XXX - this is a pain, because you might have to extract
278 * the address from the packet and use it in a DL_UNITDATA_REQ
279 * request. That would be dependent on the link-layer type.
280 *
281 * I also don't know what SAP you'd have to bind the descriptor
282 * to, or whether you'd need separate "receive" and "send" FDs,
283 * nor do I know whether you'd need different bindings for
284 * D/I/X Ethernet and 802.3, or for {FDDI,Token Ring} plus
285 * 802.2 and {FDDI,Token Ring} plus 802.2 plus SNAP.
286 *
287 * So, for now, we just return a "you can't send" indication,
288 * and leave it up to somebody with a DLPI-based system lacking
289 * both DLIOCRAW and DL_HP_RAWDLS to supply code to implement
290 * packet transmission on that system. If they do, they should
291 * send it to us - but should not send us code that assumes
292 * Ethernet; if the code doesn't work on non-Ethernet interfaces,
293 * it should check "p->linktype" and reject the send request if
294 * it's anything other than DLT_EN10MB.
295 */
296 strlcpy(p->errbuf, "send: Not supported on this version of this OS",
297 PCAP_ERRBUF_SIZE);
298 ret = -1;
299 #endif /* raw mode */
300 return (ret);
301 }
302  
303 #ifndef DL_IPATM
304 #define DL_IPATM 0x12 /* ATM Classical IP interface */
305 #endif
306  
307 #ifdef HAVE_SOLARIS
308 /*
309 * For SunATM.
310 */
311 #ifndef A_GET_UNITS
312 #define A_GET_UNITS (('A'<<8)|118)
313 #endif /* A_GET_UNITS */
314 #ifndef A_PROMISCON_REQ
315 #define A_PROMISCON_REQ (('A'<<8)|121)
316 #endif /* A_PROMISCON_REQ */
317 #endif /* HAVE_SOLARIS */
318  
319 static void
320 pcap_cleanup_dlpi(pcap_t *p)
321 {
322 #ifdef DL_HP_RAWDLS
323 struct pcap_dlpi *pd = p->priv;
324  
325 if (pd->send_fd >= 0) {
326 close(pd->send_fd);
327 pd->send_fd = -1;
328 }
329 #endif
330 pcap_cleanup_live_common(p);
331 }
332  
333 static int
334 pcap_activate_dlpi(pcap_t *p)
335 {
336 #ifdef DL_HP_RAWDLS
337 struct pcap_dlpi *pd = p->priv;
338 #endif
339 int status = 0;
340 int retv;
341 register char *cp;
342 int ppa;
343 #ifdef HAVE_SOLARIS
344 int isatm = 0;
345 #endif
346 register dl_info_ack_t *infop;
347 #ifdef HAVE_SYS_BUFMOD_H
348 bpf_u_int32 ss;
349 #ifdef HAVE_SOLARIS
350 register char *release;
351 bpf_u_int32 osmajor, osminor, osmicro;
352 #endif
353 #endif
354 bpf_u_int32 buf[MAXDLBUF];
355 char dname[100];
356 #ifndef HAVE_DEV_DLPI
357 char dname2[100];
358 #endif
359  
360 #ifdef HAVE_DEV_DLPI
361 /*
362 ** Remove any "/dev/" on the front of the device.
363 */
364 cp = strrchr(p->opt.source, '/');
365 if (cp == NULL)
366 strlcpy(dname, p->opt.source, sizeof(dname));
367 else
368 strlcpy(dname, cp + 1, sizeof(dname));
369  
370 /*
371 * Split the device name into a device type name and a unit number;
372 * chop off the unit number, so "dname" is just a device type name.
373 */
374 cp = split_dname(dname, &ppa, p->errbuf);
375 if (cp == NULL) {
376 status = PCAP_ERROR_NO_SUCH_DEVICE;
377 goto bad;
378 }
379 *cp = '\0';
380  
381 /*
382 * Use "/dev/dlpi" as the device.
383 *
384 * XXX - HP's DLPI Programmer's Guide for HP-UX 11.00 says that
385 * the "dl_mjr_num" field is for the "major number of interface
386 * driver"; that's the major of "/dev/dlpi" on the system on
387 * which I tried this, but there may be DLPI devices that
388 * use a different driver, in which case we may need to
389 * search "/dev" for the appropriate device with that major
390 * device number, rather than hardwiring "/dev/dlpi".
391 */
392 cp = "/dev/dlpi";
393 if ((p->fd = open(cp, O_RDWR)) < 0) {
394 if (errno == EPERM || errno == EACCES)
395 status = PCAP_ERROR_PERM_DENIED;
396 else
397 status = PCAP_ERROR;
398 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
399 "%s: %s", cp, pcap_strerror(errno));
400 goto bad;
401 }
402  
403 #ifdef DL_HP_RAWDLS
404 /*
405 * XXX - HP-UX 10.20 and 11.xx don't appear to support sending and
406 * receiving packets on the same descriptor - you need separate
407 * descriptors for sending and receiving, bound to different SAPs.
408 *
409 * If the open fails, we just leave -1 in "pd->send_fd" and reject
410 * attempts to send packets, just as if, in pcap-bpf.c, we fail
411 * to open the BPF device for reading and writing, we just try
412 * to open it for reading only and, if that succeeds, just let
413 * the send attempts fail.
414 */
415 pd->send_fd = open(cp, O_RDWR);
416 #endif
417  
418 /*
419 * Get a table of all PPAs for that device, and search that
420 * table for the specified device type name and unit number.
421 */
422 ppa = get_dlpi_ppa(p->fd, dname, ppa, p->errbuf);
423 if (ppa < 0) {
424 status = ppa;
425 goto bad;
426 }
427 #else
428 /*
429 * If the device name begins with "/", assume it begins with
430 * the pathname of the directory containing the device to open;
431 * otherwise, concatenate the device directory name and the
432 * device name.
433 */
434 if (*p->opt.source == '/')
435 strlcpy(dname, p->opt.source, sizeof(dname));
436 else
437 snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX,
438 p->opt.source);
439  
440 /*
441 * Get the unit number, and a pointer to the end of the device
442 * type name.
443 */
444 cp = split_dname(dname, &ppa, p->errbuf);
445 if (cp == NULL) {
446 status = PCAP_ERROR_NO_SUCH_DEVICE;
447 goto bad;
448 }
449  
450 /*
451 * Make a copy of the device pathname, and then remove the unit
452 * number from the device pathname.
453 */
454 strlcpy(dname2, dname, sizeof(dname));
455 *cp = '\0';
456  
457 /* Try device without unit number */
458 if ((p->fd = open(dname, O_RDWR)) < 0) {
459 if (errno != ENOENT) {
460 if (errno == EPERM || errno == EACCES)
461 status = PCAP_ERROR_PERM_DENIED;
462 else
463 status = PCAP_ERROR;
464 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s: %s", dname,
465 pcap_strerror(errno));
466 goto bad;
467 }
468  
469 /* Try again with unit number */
470 if ((p->fd = open(dname2, O_RDWR)) < 0) {
471 if (errno == ENOENT) {
472 status = PCAP_ERROR_NO_SUCH_DEVICE;
473  
474 /*
475 * We provide an error message even
476 * for this error, for diagnostic
477 * purposes (so that, for example,
478 * the app can show the message if the
479 * user requests it).
480 *
481 * In it, we just report "No DLPI device
482 * found" with the device name, so people
483 * don't get confused and think, for example,
484 * that if they can't capture on "lo0"
485 * on Solaris the fix is to change libpcap
486 * (or the application that uses it) to
487 * look for something other than "/dev/lo0",
488 * as the fix is to look for an operating
489 * system other than Solaris - you just
490 * *can't* capture on a loopback interface
491 * on Solaris, the lack of a DLPI device
492 * for the loopback interface is just a
493 * symptom of that inability.
494 */
495 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
496 "%s: No DLPI device found", p->opt.source);
497 } else {
498 if (errno == EPERM || errno == EACCES)
499 status = PCAP_ERROR_PERM_DENIED;
500 else
501 status = PCAP_ERROR;
502 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s: %s",
503 dname2, pcap_strerror(errno));
504 }
505 goto bad;
506 }
507 /* XXX Assume unit zero */
508 ppa = 0;
509 }
510 #endif
511  
512 /*
513 ** Attach if "style 2" provider
514 */
515 if (dlinforeq(p->fd, p->errbuf) < 0 ||
516 dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) {
517 status = PCAP_ERROR;
518 goto bad;
519 }
520 infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
521 #ifdef HAVE_SOLARIS
522 if (infop->dl_mac_type == DL_IPATM)
523 isatm = 1;
524 #endif
525 if (infop->dl_provider_style == DL_STYLE2) {
526 retv = dl_doattach(p->fd, ppa, p->errbuf);
527 if (retv < 0) {
528 status = retv;
529 goto bad;
530 }
531 #ifdef DL_HP_RAWDLS
532 if (pd->send_fd >= 0) {
533 retv = dl_doattach(pd->send_fd, ppa, p->errbuf);
534 if (retv < 0) {
535 status = retv;
536 goto bad;
537 }
538 }
539 #endif
540 }
541  
542 if (p->opt.rfmon) {
543 /*
544 * This device exists, but we don't support monitor mode
545 * any platforms that support DLPI.
546 */
547 status = PCAP_ERROR_RFMON_NOTSUP;
548 goto bad;
549 }
550  
551 #ifdef HAVE_DLPI_PASSIVE
552 /*
553 * Enable Passive mode to be able to capture on aggregated link.
554 * Not supported in all Solaris versions.
555 */
556 dlpassive(p->fd, p->errbuf);
557 #endif
558 /*
559 ** Bind (defer if using HP-UX 9 or HP-UX 10.20 or later, totally
560 ** skip if using SINIX)
561 */
562 #if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20_OR_LATER) && !defined(sinix)
563 #ifdef _AIX
564 /*
565 ** AIX.
566 ** According to IBM's AIX Support Line, the dl_sap value
567 ** should not be less than 0x600 (1536) for standard Ethernet.
568 ** However, we seem to get DL_BADADDR - "DLSAP addr in improper
569 ** format or invalid" - errors if we use 1537 on the "tr0"
570 ** device, which, given that its name starts with "tr" and that
571 ** it's IBM, probably means a Token Ring device. (Perhaps we
572 ** need to use 1537 on "/dev/dlpi/en" because that device is for
573 ** D/I/X Ethernet, the "SAP" is actually an Ethernet type, and
574 ** it rejects invalid Ethernet types.)
575 **
576 ** So if 1537 fails, we try 2, as Hyung Sik Yoon of IBM Korea
577 ** says that works on Token Ring (he says that 0 does *not*
578 ** work; perhaps that's considered an invalid LLC SAP value - I
579 ** assume the SAP value in a DLPI bind is an LLC SAP for network
580 ** types that use 802.2 LLC).
581 */
582 if ((dlbindreq(p->fd, 1537, p->errbuf) < 0 &&
583 dlbindreq(p->fd, 2, p->errbuf) < 0) ||
584 dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) {
585 status = PCAP_ERROR;
586 goto bad;
587 }
588 #elif defined(DL_HP_RAWDLS)
589 /*
590 ** HP-UX 10.0x and 10.1x.
591 */
592 if (dl_dohpuxbind(p->fd, p->errbuf) < 0) {
593 status = PCAP_ERROR;
594 goto bad;
595 }
596 if (pd->send_fd >= 0) {
597 /*
598 ** XXX - if this fails, just close send_fd and
599 ** set it to -1, so that you can't send but can
600 ** still receive?
601 */
602 if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) {
603 status = PCAP_ERROR;
604 goto bad;
605 }
606 }
607 #else /* neither AIX nor HP-UX */
608 /*
609 ** Not Sinix, and neither AIX nor HP-UX - Solaris, and any other
610 ** OS using DLPI.
611 **/
612 if (dlbindreq(p->fd, 0, p->errbuf) < 0 ||
613 dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) {
614 status = PCAP_ERROR;
615 goto bad;
616 }
617 #endif /* AIX vs. HP-UX vs. other */
618 #endif /* !HP-UX 9 and !HP-UX 10.20 or later and !SINIX */
619  
620 #ifdef HAVE_SOLARIS
621 if (isatm) {
622 /*
623 ** Have to turn on some special ATM promiscuous mode
624 ** for SunATM.
625 ** Do *NOT* turn regular promiscuous mode on; it doesn't
626 ** help, and may break things.
627 */
628 if (strioctl(p->fd, A_PROMISCON_REQ, 0, NULL) < 0) {
629 status = PCAP_ERROR;
630 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
631 "A_PROMISCON_REQ: %s", pcap_strerror(errno));
632 goto bad;
633 }
634 } else
635 #endif
636 if (p->opt.promisc) {
637 /*
638 ** Enable promiscuous (not necessary on send FD)
639 */
640 retv = dlpromiscon(p, DL_PROMISC_PHYS);
641 if (retv < 0) {
642 if (retv == PCAP_ERROR_PERM_DENIED)
643 status = PCAP_ERROR_PROMISC_PERM_DENIED;
644 else
645 status = retv;
646 goto bad;
647 }
648  
649 /*
650 ** Try to enable multicast (you would have thought
651 ** promiscuous would be sufficient). (Skip if using
652 ** HP-UX or SINIX) (Not necessary on send FD)
653 */
654 #if !defined(__hpux) && !defined(sinix)
655 retv = dlpromiscon(p, DL_PROMISC_MULTI);
656 if (retv < 0)
657 status = PCAP_WARNING;
658 #endif
659 }
660 /*
661 ** Try to enable SAP promiscuity (when not in promiscuous mode
662 ** when using HP-UX, when not doing SunATM on Solaris, and never
663 ** under SINIX) (Not necessary on send FD)
664 */
665 #ifndef sinix
666 #if defined(__hpux)
667 /* HP-UX - only do this when not in promiscuous mode */
668 if (!p->opt.promisc) {
669 #elif defined(HAVE_SOLARIS)
670 /* Solaris - don't do this on SunATM devices */
671 if (!isatm) {
672 #else
673 /* Everything else (except for SINIX) - always do this */
674 {
675 #endif
676 retv = dlpromiscon(p, DL_PROMISC_SAP);
677 if (retv < 0) {
678 if (p->opt.promisc) {
679 /*
680 * Not fatal, since the DL_PROMISC_PHYS mode
681 * worked.
682 *
683 * Report it as a warning, however.
684 */
685 status = PCAP_WARNING;
686 } else {
687 /*
688 * Fatal.
689 */
690 status = retv;
691 goto bad;
692 }
693 }
694 }
695 #endif /* sinix */
696  
697 /*
698 ** HP-UX 9, and HP-UX 10.20 or later, must bind after setting
699 ** promiscuous options.
700 */
701 #if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20_OR_LATER)
702 if (dl_dohpuxbind(p->fd, p->errbuf) < 0) {
703 status = PCAP_ERROR;
704 goto bad;
705 }
706 /*
707 ** We don't set promiscuous mode on the send FD, but we'll defer
708 ** binding it anyway, just to keep the HP-UX 9/10.20 or later
709 ** code together.
710 */
711 if (pd->send_fd >= 0) {
712 /*
713 ** XXX - if this fails, just close send_fd and
714 ** set it to -1, so that you can't send but can
715 ** still receive?
716 */
717 if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) {
718 status = PCAP_ERROR;
719 goto bad;
720 }
721 }
722 #endif
723  
724 /*
725 ** Determine link type
726 ** XXX - get SAP length and address length as well, for use
727 ** when sending packets.
728 */
729 if (dlinforeq(p->fd, p->errbuf) < 0 ||
730 dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) {
731 status = PCAP_ERROR;
732 goto bad;
733 }
734  
735 infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
736 if (pcap_process_mactype(p, infop->dl_mac_type) != 0) {
737 status = PCAP_ERROR;
738 goto bad;
739 }
740  
741 #ifdef DLIOCRAW
742 /*
743 ** This is a non standard SunOS hack to get the full raw link-layer
744 ** header.
745 */
746 if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) {
747 status = PCAP_ERROR;
748 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "DLIOCRAW: %s",
749 pcap_strerror(errno));
750 goto bad;
751 }
752 #endif
753  
754 #ifdef HAVE_SYS_BUFMOD_H
755 ss = p->snapshot;
756  
757 /*
758 ** There is a bug in bufmod(7). When dealing with messages of
759 ** less than snaplen size it strips data from the beginning not
760 ** the end.
761 **
762 ** This bug is fixed in 5.3.2. Also, there is a patch available.
763 ** Ask for bugid 1149065.
764 */
765 #ifdef HAVE_SOLARIS
766 release = get_release(&osmajor, &osminor, &osmicro);
767 if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) &&
768 getenv("BUFMOD_FIXED") == NULL) {
769 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
770 "WARNING: bufmod is broken in SunOS %s; ignoring snaplen.",
771 release);
772 ss = 0;
773 status = PCAP_WARNING;
774 }
775 #endif
776  
777 /* Push and configure bufmod. */
778 if (pcap_conf_bufmod(p, ss) != 0) {
779 status = PCAP_ERROR;
780 goto bad;
781 }
782 #endif
783  
784 /*
785 ** As the last operation flush the read side.
786 */
787 if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
788 status = PCAP_ERROR;
789 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
790 pcap_strerror(errno));
791 goto bad;
792 }
793  
794 /* Allocate data buffer. */
795 if (pcap_alloc_databuf(p) != 0) {
796 status = PCAP_ERROR;
797 goto bad;
798 }
799  
800 /*
801 * Success.
802 *
803 * "p->fd" is an FD for a STREAMS device, so "select()" and
804 * "poll()" should work on it.
805 */
806 p->selectable_fd = p->fd;
807  
808 p->read_op = pcap_read_dlpi;
809 p->inject_op = pcap_inject_dlpi;
810 p->setfilter_op = install_bpf_program; /* no kernel filtering */
811 p->setdirection_op = NULL; /* Not implemented.*/
812 p->set_datalink_op = NULL; /* can't change data link type */
813 p->getnonblock_op = pcap_getnonblock_fd;
814 p->setnonblock_op = pcap_setnonblock_fd;
815 p->stats_op = pcap_stats_dlpi;
816 p->cleanup_op = pcap_cleanup_dlpi;
817  
818 return (status);
819 bad:
820 pcap_cleanup_dlpi(p);
821 return (status);
822 }
823  
824 /*
825 * Split a device name into a device type name and a unit number;
826 * return the a pointer to the beginning of the unit number, which
827 * is the end of the device type name, and set "*unitp" to the unit
828 * number.
829 *
830 * Returns NULL on error, and fills "ebuf" with an error message.
831 */
832 static char *
833 split_dname(char *device, int *unitp, char *ebuf)
834 {
835 char *cp;
836 char *eos;
837 long unit;
838  
839 /*
840 * Look for a number at the end of the device name string.
841 */
842 cp = device + strlen(device) - 1;
843 if (*cp < '0' || *cp > '9') {
844 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s missing unit number",
845 device);
846 return (NULL);
847 }
848  
849 /* Digits at end of string are unit number */
850 while (cp-1 >= device && *(cp-1) >= '0' && *(cp-1) <= '9')
851 cp--;
852  
853 errno = 0;
854 unit = strtol(cp, &eos, 10);
855 if (*eos != '\0') {
856 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s bad unit number", device);
857 return (NULL);
858 }
859 if (errno == ERANGE || unit > INT_MAX) {
860 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number too large",
861 device);
862 return (NULL);
863 }
864 if (unit < 0) {
865 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number is negative",
866 device);
867 return (NULL);
868 }
869 *unitp = (int)unit;
870 return (cp);
871 }
872  
873 static int
874 dl_doattach(int fd, int ppa, char *ebuf)
875 {
876 dl_attach_req_t req;
877 bpf_u_int32 buf[MAXDLBUF];
878 int err;
879  
880 req.dl_primitive = DL_ATTACH_REQ;
881 req.dl_ppa = ppa;
882 if (send_request(fd, (char *)&req, sizeof(req), "attach", ebuf) < 0)
883 return (PCAP_ERROR);
884  
885 err = dlokack(fd, "attach", (char *)buf, ebuf);
886 if (err < 0)
887 return (err);
888 return (0);
889 }
890  
891 #ifdef DL_HP_RAWDLS
892 static int
893 dl_dohpuxbind(int fd, char *ebuf)
894 {
895 int hpsap;
896 int uerror;
897 bpf_u_int32 buf[MAXDLBUF];
898  
899 /*
900 * XXX - we start at 22 because we used to use only 22, but
901 * that was just because that was the value used in some
902 * sample code from HP. With what value *should* we start?
903 * Does it matter, given that we're enabling SAP promiscuity
904 * on the input FD?
905 */
906 hpsap = 22;
907 for (;;) {
908 if (dlbindreq(fd, hpsap, ebuf) < 0)
909 return (-1);
910 if (dlbindack(fd, (char *)buf, ebuf, &uerror) >= 0)
911 break;
912 /*
913 * For any error other than a UNIX EBUSY, give up.
914 */
915 if (uerror != EBUSY) {
916 /*
917 * dlbindack() has already filled in ebuf for
918 * this error.
919 */
920 return (-1);
921 }
922  
923 /*
924 * For EBUSY, try the next SAP value; that means that
925 * somebody else is using that SAP. Clear ebuf so
926 * that application doesn't report the "Device busy"
927 * error as a warning.
928 */
929 *ebuf = '\0';
930 hpsap++;
931 if (hpsap > 100) {
932 strlcpy(ebuf,
933 "All SAPs from 22 through 100 are in use",
934 PCAP_ERRBUF_SIZE);
935 return (-1);
936 }
937 }
938 return (0);
939 }
940 #endif
941  
942 #define STRINGIFY(n) #n
943  
944 static int
945 dlpromiscon(pcap_t *p, bpf_u_int32 level)
946 {
947 dl_promiscon_req_t req;
948 bpf_u_int32 buf[MAXDLBUF];
949 int err;
950  
951 req.dl_primitive = DL_PROMISCON_REQ;
952 req.dl_level = level;
953 if (send_request(p->fd, (char *)&req, sizeof(req), "promiscon",
954 p->errbuf) < 0)
955 return (PCAP_ERROR);
956 err = dlokack(p->fd, "promiscon" STRINGIFY(level), (char *)buf,
957 p->errbuf);
958 if (err < 0)
959 return (err);
960 return (0);
961 }
962  
963 int
964 pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
965 {
966 #ifdef HAVE_SOLARIS
967 int fd;
968 union {
969 u_int nunits;
970 char pad[516]; /* XXX - must be at least 513; is 516
971 in "atmgetunits" */
972 } buf;
973 char baname[2+1+1];
974 u_int i;
975  
976 /*
977 * We may have to do special magic to get ATM devices.
978 */
979 if ((fd = open("/dev/ba", O_RDWR)) < 0) {
980 /*
981 * We couldn't open the "ba" device.
982 * For now, just give up; perhaps we should
983 * return an error if the problem is neither
984 * a "that device doesn't exist" error (ENOENT,
985 * ENXIO, etc.) or a "you're not allowed to do
986 * that" error (EPERM, EACCES).
987 */
988 return (0);
989 }
990  
991 if (strioctl(fd, A_GET_UNITS, sizeof(buf), (char *)&buf) < 0) {
992 snprintf(errbuf, PCAP_ERRBUF_SIZE, "A_GET_UNITS: %s",
993 pcap_strerror(errno));
994 return (-1);
995 }
996 for (i = 0; i < buf.nunits; i++) {
997 snprintf(baname, sizeof baname, "ba%u", i);
998 if (pcap_add_if(alldevsp, baname, 0, NULL, errbuf) < 0)
999 return (-1);
1000 }
1001 #endif
1002  
1003 return (0);
1004 }
1005  
1006 static int
1007 send_request(int fd, char *ptr, int len, char *what, char *ebuf)
1008 {
1009 struct strbuf ctl;
1010 int flags;
1011  
1012 ctl.maxlen = 0;
1013 ctl.len = len;
1014 ctl.buf = ptr;
1015  
1016 flags = 0;
1017 if (putmsg(fd, &ctl, (struct strbuf *) NULL, flags) < 0) {
1018 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1019 "send_request: putmsg \"%s\": %s",
1020 what, pcap_strerror(errno));
1021 return (-1);
1022 }
1023 return (0);
1024 }
1025  
1026 static int
1027 recv_ack(int fd, int size, const char *what, char *bufp, char *ebuf, int *uerror)
1028 {
1029 union DL_primitives *dlp;
1030 struct strbuf ctl;
1031 int flags;
1032  
1033 /*
1034 * Clear out "*uerror", so it's only set for DL_ERROR_ACK/DL_SYSERR,
1035 * making that the only place where EBUSY is treated specially.
1036 */
1037 if (uerror != NULL)
1038 *uerror = 0;
1039  
1040 ctl.maxlen = MAXDLBUF;
1041 ctl.len = 0;
1042 ctl.buf = bufp;
1043  
1044 flags = 0;
1045 if (getmsg(fd, &ctl, (struct strbuf*)NULL, &flags) < 0) {
1046 snprintf(ebuf, PCAP_ERRBUF_SIZE, "recv_ack: %s getmsg: %s",
1047 what, pcap_strerror(errno));
1048 return (PCAP_ERROR);
1049 }
1050  
1051 dlp = MAKE_DL_PRIMITIVES(ctl.buf);
1052 switch (dlp->dl_primitive) {
1053  
1054 case DL_INFO_ACK:
1055 case DL_BIND_ACK:
1056 case DL_OK_ACK:
1057 #ifdef DL_HP_PPA_ACK
1058 case DL_HP_PPA_ACK:
1059 #endif
1060 /* These are OK */
1061 break;
1062  
1063 case DL_ERROR_ACK:
1064 switch (dlp->error_ack.dl_errno) {
1065  
1066 case DL_SYSERR:
1067 if (uerror != NULL)
1068 *uerror = dlp->error_ack.dl_unix_errno;
1069 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1070 "recv_ack: %s: UNIX error - %s",
1071 what, pcap_strerror(dlp->error_ack.dl_unix_errno));
1072 if (dlp->error_ack.dl_unix_errno == EPERM ||
1073 dlp->error_ack.dl_unix_errno == EACCES)
1074 return (PCAP_ERROR_PERM_DENIED);
1075 break;
1076  
1077 default:
1078 snprintf(ebuf, PCAP_ERRBUF_SIZE, "recv_ack: %s: %s",
1079 what, dlstrerror(dlp->error_ack.dl_errno));
1080 if (dlp->error_ack.dl_errno == DL_BADPPA)
1081 return (PCAP_ERROR_NO_SUCH_DEVICE);
1082 else if (dlp->error_ack.dl_errno == DL_ACCESS)
1083 return (PCAP_ERROR_PERM_DENIED);
1084 break;
1085 }
1086 return (PCAP_ERROR);
1087  
1088 default:
1089 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1090 "recv_ack: %s: Unexpected primitive ack %s",
1091 what, dlprim(dlp->dl_primitive));
1092 return (PCAP_ERROR);
1093 }
1094  
1095 if (ctl.len < size) {
1096 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1097 "recv_ack: %s: Ack too small (%d < %d)",
1098 what, ctl.len, size);
1099 return (PCAP_ERROR);
1100 }
1101 return (ctl.len);
1102 }
1103  
1104 static char *
1105 dlstrerror(bpf_u_int32 dl_errno)
1106 {
1107 static char errstring[6+2+8+1];
1108  
1109 switch (dl_errno) {
1110  
1111 case DL_ACCESS:
1112 return ("Improper permissions for request");
1113  
1114 case DL_BADADDR:
1115 return ("DLSAP addr in improper format or invalid");
1116  
1117 case DL_BADCORR:
1118 return ("Seq number not from outstand DL_CONN_IND");
1119  
1120 case DL_BADDATA:
1121 return ("User data exceeded provider limit");
1122  
1123 case DL_BADPPA:
1124 #ifdef HAVE_DEV_DLPI
1125 /*
1126 * With a single "/dev/dlpi" device used for all
1127 * DLPI providers, PPAs have nothing to do with
1128 * unit numbers.
1129 */
1130 return ("Specified PPA was invalid");
1131 #else
1132 /*
1133 * We have separate devices for separate devices;
1134 * the PPA is just the unit number.
1135 */
1136 return ("Specified PPA (device unit) was invalid");
1137 #endif
1138  
1139 case DL_BADPRIM:
1140 return ("Primitive received not known by provider");
1141  
1142 case DL_BADQOSPARAM:
1143 return ("QOS parameters contained invalid values");
1144  
1145 case DL_BADQOSTYPE:
1146 return ("QOS structure type is unknown/unsupported");
1147  
1148 case DL_BADSAP:
1149 return ("Bad LSAP selector");
1150  
1151 case DL_BADTOKEN:
1152 return ("Token used not an active stream");
1153  
1154 case DL_BOUND:
1155 return ("Attempted second bind with dl_max_conind");
1156  
1157 case DL_INITFAILED:
1158 return ("Physical link initialization failed");
1159  
1160 case DL_NOADDR:
1161 return ("Provider couldn't allocate alternate address");
1162  
1163 case DL_NOTINIT:
1164 return ("Physical link not initialized");
1165  
1166 case DL_OUTSTATE:
1167 return ("Primitive issued in improper state");
1168  
1169 case DL_SYSERR:
1170 return ("UNIX system error occurred");
1171  
1172 case DL_UNSUPPORTED:
1173 return ("Requested service not supplied by provider");
1174  
1175 case DL_UNDELIVERABLE:
1176 return ("Previous data unit could not be delivered");
1177  
1178 case DL_NOTSUPPORTED:
1179 return ("Primitive is known but not supported");
1180  
1181 case DL_TOOMANY:
1182 return ("Limit exceeded");
1183  
1184 case DL_NOTENAB:
1185 return ("Promiscuous mode not enabled");
1186  
1187 case DL_BUSY:
1188 return ("Other streams for PPA in post-attached");
1189  
1190 case DL_NOAUTO:
1191 return ("Automatic handling XID&TEST not supported");
1192  
1193 case DL_NOXIDAUTO:
1194 return ("Automatic handling of XID not supported");
1195  
1196 case DL_NOTESTAUTO:
1197 return ("Automatic handling of TEST not supported");
1198  
1199 case DL_XIDAUTO:
1200 return ("Automatic handling of XID response");
1201  
1202 case DL_TESTAUTO:
1203 return ("Automatic handling of TEST response");
1204  
1205 case DL_PENDING:
1206 return ("Pending outstanding connect indications");
1207  
1208 default:
1209 sprintf(errstring, "Error %02x", dl_errno);
1210 return (errstring);
1211 }
1212 }
1213  
1214 static char *
1215 dlprim(bpf_u_int32 prim)
1216 {
1217 static char primbuf[80];
1218  
1219 switch (prim) {
1220  
1221 case DL_INFO_REQ:
1222 return ("DL_INFO_REQ");
1223  
1224 case DL_INFO_ACK:
1225 return ("DL_INFO_ACK");
1226  
1227 case DL_ATTACH_REQ:
1228 return ("DL_ATTACH_REQ");
1229  
1230 case DL_DETACH_REQ:
1231 return ("DL_DETACH_REQ");
1232  
1233 case DL_BIND_REQ:
1234 return ("DL_BIND_REQ");
1235  
1236 case DL_BIND_ACK:
1237 return ("DL_BIND_ACK");
1238  
1239 case DL_UNBIND_REQ:
1240 return ("DL_UNBIND_REQ");
1241  
1242 case DL_OK_ACK:
1243 return ("DL_OK_ACK");
1244  
1245 case DL_ERROR_ACK:
1246 return ("DL_ERROR_ACK");
1247  
1248 case DL_SUBS_BIND_REQ:
1249 return ("DL_SUBS_BIND_REQ");
1250  
1251 case DL_SUBS_BIND_ACK:
1252 return ("DL_SUBS_BIND_ACK");
1253  
1254 case DL_UNITDATA_REQ:
1255 return ("DL_UNITDATA_REQ");
1256  
1257 case DL_UNITDATA_IND:
1258 return ("DL_UNITDATA_IND");
1259  
1260 case DL_UDERROR_IND:
1261 return ("DL_UDERROR_IND");
1262  
1263 case DL_UDQOS_REQ:
1264 return ("DL_UDQOS_REQ");
1265  
1266 case DL_CONNECT_REQ:
1267 return ("DL_CONNECT_REQ");
1268  
1269 case DL_CONNECT_IND:
1270 return ("DL_CONNECT_IND");
1271  
1272 case DL_CONNECT_RES:
1273 return ("DL_CONNECT_RES");
1274  
1275 case DL_CONNECT_CON:
1276 return ("DL_CONNECT_CON");
1277  
1278 case DL_TOKEN_REQ:
1279 return ("DL_TOKEN_REQ");
1280  
1281 case DL_TOKEN_ACK:
1282 return ("DL_TOKEN_ACK");
1283  
1284 case DL_DISCONNECT_REQ:
1285 return ("DL_DISCONNECT_REQ");
1286  
1287 case DL_DISCONNECT_IND:
1288 return ("DL_DISCONNECT_IND");
1289  
1290 case DL_RESET_REQ:
1291 return ("DL_RESET_REQ");
1292  
1293 case DL_RESET_IND:
1294 return ("DL_RESET_IND");
1295  
1296 case DL_RESET_RES:
1297 return ("DL_RESET_RES");
1298  
1299 case DL_RESET_CON:
1300 return ("DL_RESET_CON");
1301  
1302 default:
1303 (void) sprintf(primbuf, "unknown primitive 0x%x", prim);
1304 return (primbuf);
1305 }
1306 }
1307  
1308 static int
1309 dlbindreq(int fd, bpf_u_int32 sap, char *ebuf)
1310 {
1311  
1312 dl_bind_req_t req;
1313  
1314 memset((char *)&req, 0, sizeof(req));
1315 req.dl_primitive = DL_BIND_REQ;
1316 /* XXX - what if neither of these are defined? */
1317 #if defined(DL_HP_RAWDLS)
1318 req.dl_max_conind = 1; /* XXX magic number */
1319 req.dl_service_mode = DL_HP_RAWDLS;
1320 #elif defined(DL_CLDLS)
1321 req.dl_service_mode = DL_CLDLS;
1322 #endif
1323 req.dl_sap = sap;
1324  
1325 return (send_request(fd, (char *)&req, sizeof(req), "bind", ebuf));
1326 }
1327  
1328 static int
1329 dlbindack(int fd, char *bufp, char *ebuf, int *uerror)
1330 {
1331  
1332 return (recv_ack(fd, DL_BIND_ACK_SIZE, "bind", bufp, ebuf, uerror));
1333 }
1334  
1335 static int
1336 dlokack(int fd, const char *what, char *bufp, char *ebuf)
1337 {
1338  
1339 return (recv_ack(fd, DL_OK_ACK_SIZE, what, bufp, ebuf, NULL));
1340 }
1341  
1342  
1343 static int
1344 dlinforeq(int fd, char *ebuf)
1345 {
1346 dl_info_req_t req;
1347  
1348 req.dl_primitive = DL_INFO_REQ;
1349  
1350 return (send_request(fd, (char *)&req, sizeof(req), "info", ebuf));
1351 }
1352  
1353 static int
1354 dlinfoack(int fd, char *bufp, char *ebuf)
1355 {
1356  
1357 return (recv_ack(fd, DL_INFO_ACK_SIZE, "info", bufp, ebuf, NULL));
1358 }
1359  
1360 #ifdef HAVE_DLPI_PASSIVE
1361 /*
1362 * Enable DLPI passive mode. We do not care if this request fails, as this
1363 * indicates the underlying DLPI device does not support link aggregation.
1364 */
1365 static void
1366 dlpassive(int fd, char *ebuf)
1367 {
1368 dl_passive_req_t req;
1369 bpf_u_int32 buf[MAXDLBUF];
1370  
1371 req.dl_primitive = DL_PASSIVE_REQ;
1372  
1373 if (send_request(fd, (char *)&req, sizeof(req), "dlpassive", ebuf) == 0)
1374 (void) dlokack(fd, "dlpassive", (char *)buf, ebuf);
1375 }
1376 #endif
1377  
1378 #ifdef DL_HP_RAWDLS
1379 /*
1380 * There's an ack *if* there's an error.
1381 */
1382 static int
1383 dlrawdatareq(int fd, const u_char *datap, int datalen)
1384 {
1385 struct strbuf ctl, data;
1386 long buf[MAXDLBUF]; /* XXX - char? */
1387 union DL_primitives *dlp;
1388 int dlen;
1389  
1390 dlp = MAKE_DL_PRIMITIVES(buf);
1391  
1392 dlp->dl_primitive = DL_HP_RAWDATA_REQ;
1393 dlen = DL_HP_RAWDATA_REQ_SIZE;
1394  
1395 /*
1396 * HP's documentation doesn't appear to show us supplying any
1397 * address pointed to by the control part of the message.
1398 * I think that's what raw mode means - you just send the raw
1399 * packet, you don't specify where to send it to, as that's
1400 * implied by the destination address.
1401 */
1402 ctl.maxlen = 0;
1403 ctl.len = dlen;
1404 ctl.buf = (void *)buf;
1405  
1406 data.maxlen = 0;
1407 data.len = datalen;
1408 data.buf = (void *)datap;
1409  
1410 return (putmsg(fd, &ctl, &data, 0));
1411 }
1412 #endif /* DL_HP_RAWDLS */
1413  
1414 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
1415 static char *
1416 get_release(bpf_u_int32 *majorp, bpf_u_int32 *minorp, bpf_u_int32 *microp)
1417 {
1418 char *cp;
1419 static char buf[32];
1420  
1421 *majorp = 0;
1422 *minorp = 0;
1423 *microp = 0;
1424 if (sysinfo(SI_RELEASE, buf, sizeof(buf)) < 0)
1425 return ("?");
1426 cp = buf;
1427 if (!isdigit((unsigned char)*cp))
1428 return (buf);
1429 *majorp = strtol(cp, &cp, 10);
1430 if (*cp++ != '.')
1431 return (buf);
1432 *minorp = strtol(cp, &cp, 10);
1433 if (*cp++ != '.')
1434 return (buf);
1435 *microp = strtol(cp, &cp, 10);
1436 return (buf);
1437 }
1438 #endif
1439  
1440 #ifdef DL_HP_PPA_REQ
1441 /*
1442 * Under HP-UX 10 and HP-UX 11, we can ask for the ppa
1443 */
1444  
1445  
1446 /*
1447 * Determine ppa number that specifies ifname.
1448 *
1449 * If the "dl_hp_ppa_info_t" doesn't have a "dl_module_id_1" member,
1450 * the code that's used here is the old code for HP-UX 10.x.
1451 *
1452 * However, HP-UX 10.20, at least, appears to have such a member
1453 * in its "dl_hp_ppa_info_t" structure, so the new code is used.
1454 * The new code didn't work on an old 10.20 system on which Rick
1455 * Jones of HP tried it, but with later patches installed, it
1456 * worked - it appears that the older system had those members but
1457 * didn't put anything in them, so, if the search by name fails, we
1458 * do the old search.
1459 *
1460 * Rick suggests that making sure your system is "up on the latest
1461 * lancommon/DLPI/driver patches" is probably a good idea; it'd fix
1462 * that problem, as well as allowing libpcap to see packets sent
1463 * from the system on which the libpcap application is being run.
1464 * (On 10.20, in addition to getting the latest patches, you need
1465 * to turn the kernel "lanc_outbound_promisc_flag" flag on with ADB;
1466 * a posting to "comp.sys.hp.hpux" at
1467 *
1468 * http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=558092266
1469 *
1470 * says that, to see the machine's outgoing traffic, you'd need to
1471 * apply the right patches to your system, and also set that variable
1472 * with:
1473  
1474 echo 'lanc_outbound_promisc_flag/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem
1475  
1476 * which could be put in, for example, "/sbin/init.d/lan".
1477 *
1478 * Setting the variable is not necessary on HP-UX 11.x.
1479 */
1480 static int
1481 get_dlpi_ppa(register int fd, register const char *device, register int unit,
1482 register char *ebuf)
1483 {
1484 register dl_hp_ppa_ack_t *ap;
1485 register dl_hp_ppa_info_t *ipstart, *ip;
1486 register int i;
1487 char dname[100];
1488 register u_long majdev;
1489 struct stat statbuf;
1490 dl_hp_ppa_req_t req;
1491 char buf[MAXDLBUF];
1492 char *ppa_data_buf;
1493 dl_hp_ppa_ack_t *dlp;
1494 struct strbuf ctl;
1495 int flags;
1496 int ppa;
1497  
1498 memset((char *)&req, 0, sizeof(req));
1499 req.dl_primitive = DL_HP_PPA_REQ;
1500  
1501 memset((char *)buf, 0, sizeof(buf));
1502 if (send_request(fd, (char *)&req, sizeof(req), "hpppa", ebuf) < 0)
1503 return (PCAP_ERROR);
1504  
1505 ctl.maxlen = DL_HP_PPA_ACK_SIZE;
1506 ctl.len = 0;
1507 ctl.buf = (char *)buf;
1508  
1509 flags = 0;
1510 /*
1511 * DLPI may return a big chunk of data for a DL_HP_PPA_REQ. The normal
1512 * recv_ack will fail because it set the maxlen to MAXDLBUF (8192)
1513 * which is NOT big enough for a DL_HP_PPA_REQ.
1514 *
1515 * This causes libpcap applications to fail on a system with HP-APA
1516 * installed.
1517 *
1518 * To figure out how big the returned data is, we first call getmsg
1519 * to get the small head and peek at the head to get the actual data
1520 * length, and then issue another getmsg to get the actual PPA data.
1521 */
1522 /* get the head first */
1523 if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
1524 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1525 "get_dlpi_ppa: hpppa getmsg: %s", pcap_strerror(errno));
1526 return (PCAP_ERROR);
1527 }
1528  
1529 dlp = (dl_hp_ppa_ack_t *)ctl.buf;
1530 if (dlp->dl_primitive != DL_HP_PPA_ACK) {
1531 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1532 "get_dlpi_ppa: hpppa unexpected primitive ack 0x%x",
1533 (bpf_u_int32)dlp->dl_primitive);
1534 return (PCAP_ERROR);
1535 }
1536  
1537 if (ctl.len < DL_HP_PPA_ACK_SIZE) {
1538 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1539 "get_dlpi_ppa: hpppa ack too small (%d < %lu)",
1540 ctl.len, (unsigned long)DL_HP_PPA_ACK_SIZE);
1541 return (PCAP_ERROR);
1542 }
1543  
1544 /* allocate buffer */
1545 if ((ppa_data_buf = (char *)malloc(dlp->dl_length)) == NULL) {
1546 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1547 "get_dlpi_ppa: hpppa malloc: %s", pcap_strerror(errno));
1548 return (PCAP_ERROR);
1549 }
1550 ctl.maxlen = dlp->dl_length;
1551 ctl.len = 0;
1552 ctl.buf = (char *)ppa_data_buf;
1553 /* get the data */
1554 if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
1555 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1556 "get_dlpi_ppa: hpppa getmsg: %s", pcap_strerror(errno));
1557 free(ppa_data_buf);
1558 return (PCAP_ERROR);
1559 }
1560 if (ctl.len < dlp->dl_length) {
1561 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1562 "get_dlpi_ppa: hpppa ack too small (%d < %lu)",
1563 ctl.len, (unsigned long)dlp->dl_length);
1564 free(ppa_data_buf);
1565 return (PCAP_ERROR);
1566 }
1567  
1568 ap = (dl_hp_ppa_ack_t *)buf;
1569 ipstart = (dl_hp_ppa_info_t *)ppa_data_buf;
1570 ip = ipstart;
1571  
1572 #ifdef HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1
1573 /*
1574 * The "dl_hp_ppa_info_t" structure has a "dl_module_id_1"
1575 * member that should, in theory, contain the part of the
1576 * name for the device that comes before the unit number,
1577 * and should also have a "dl_module_id_2" member that may
1578 * contain an alternate name (e.g., I think Ethernet devices
1579 * have both "lan", for "lanN", and "snap", for "snapN", with
1580 * the former being for Ethernet packets and the latter being
1581 * for 802.3/802.2 packets).
1582 *
1583 * Search for the device that has the specified name and
1584 * instance number.
1585 */
1586 for (i = 0; i < ap->dl_count; i++) {
1587 if ((strcmp((const char *)ip->dl_module_id_1, device) == 0 ||
1588 strcmp((const char *)ip->dl_module_id_2, device) == 0) &&
1589 ip->dl_instance_num == unit)
1590 break;
1591  
1592 ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
1593 }
1594 #else
1595 /*
1596 * We don't have that member, so the search is impossible; make it
1597 * look as if the search failed.
1598 */
1599 i = ap->dl_count;
1600 #endif
1601  
1602 if (i == ap->dl_count) {
1603 /*
1604 * Well, we didn't, or can't, find the device by name.
1605 *
1606 * HP-UX 10.20, whilst it has "dl_module_id_1" and
1607 * "dl_module_id_2" fields in the "dl_hp_ppa_info_t",
1608 * doesn't seem to fill them in unless the system is
1609 * at a reasonably up-to-date patch level.
1610 *
1611 * Older HP-UX 10.x systems might not have those fields
1612 * at all.
1613 *
1614 * Therefore, we'll search for the entry with the major
1615 * device number of a device with the name "/dev/<dev><unit>",
1616 * if such a device exists, as the old code did.
1617 */
1618 snprintf(dname, sizeof(dname), "/dev/%s%d", device, unit);
1619 if (stat(dname, &statbuf) < 0) {
1620 snprintf(ebuf, PCAP_ERRBUF_SIZE, "stat: %s: %s",
1621 dname, pcap_strerror(errno));
1622 return (PCAP_ERROR);
1623 }
1624 majdev = major(statbuf.st_rdev);
1625  
1626 ip = ipstart;
1627  
1628 for (i = 0; i < ap->dl_count; i++) {
1629 if (ip->dl_mjr_num == majdev &&
1630 ip->dl_instance_num == unit)
1631 break;
1632  
1633 ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
1634 }
1635 }
1636 if (i == ap->dl_count) {
1637 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1638 "can't find /dev/dlpi PPA for %s%d", device, unit);
1639 return (PCAP_ERROR_NO_SUCH_DEVICE);
1640 }
1641 if (ip->dl_hdw_state == HDW_DEAD) {
1642 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1643 "%s%d: hardware state: DOWN\n", device, unit);
1644 free(ppa_data_buf);
1645 return (PCAP_ERROR);
1646 }
1647 ppa = ip->dl_ppa;
1648 free(ppa_data_buf);
1649 return (ppa);
1650 }
1651 #endif
1652  
1653 #ifdef HAVE_HPUX9
1654 /*
1655 * Under HP-UX 9, there is no good way to determine the ppa.
1656 * So punt and read it from /dev/kmem.
1657 */
1658 static struct nlist nl[] = {
1659 #define NL_IFNET 0
1660 { "ifnet" },
1661 { "" }
1662 };
1663  
1664 static char path_vmunix[] = "/hp-ux";
1665  
1666 /* Determine ppa number that specifies ifname */
1667 static int
1668 get_dlpi_ppa(register int fd, register const char *ifname, register int unit,
1669 register char *ebuf)
1670 {
1671 register const char *cp;
1672 register int kd;
1673 void *addr;
1674 struct ifnet ifnet;
1675 char if_name[sizeof(ifnet.if_name) + 1];
1676  
1677 cp = strrchr(ifname, '/');
1678 if (cp != NULL)
1679 ifname = cp + 1;
1680 if (nlist(path_vmunix, &nl) < 0) {
1681 snprintf(ebuf, PCAP_ERRBUF_SIZE, "nlist %s failed",
1682 path_vmunix);
1683 return (-1);
1684 }
1685 if (nl[NL_IFNET].n_value == 0) {
1686 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1687 "could't find %s kernel symbol",
1688 nl[NL_IFNET].n_name);
1689 return (-1);
1690 }
1691 kd = open("/dev/kmem", O_RDONLY);
1692 if (kd < 0) {
1693 snprintf(ebuf, PCAP_ERRBUF_SIZE, "kmem open: %s",
1694 pcap_strerror(errno));
1695 return (-1);
1696 }
1697 if (dlpi_kread(kd, nl[NL_IFNET].n_value,
1698 &addr, sizeof(addr), ebuf) < 0) {
1699 close(kd);
1700 return (-1);
1701 }
1702 for (; addr != NULL; addr = ifnet.if_next) {
1703 if (dlpi_kread(kd, (off_t)addr,
1704 &ifnet, sizeof(ifnet), ebuf) < 0 ||
1705 dlpi_kread(kd, (off_t)ifnet.if_name,
1706 if_name, sizeof(ifnet.if_name), ebuf) < 0) {
1707 (void)close(kd);
1708 return (-1);
1709 }
1710 if_name[sizeof(ifnet.if_name)] = '\0';
1711 if (strcmp(if_name, ifname) == 0 && ifnet.if_unit == unit)
1712 return (ifnet.if_index);
1713 }
1714  
1715 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't find %s", ifname);
1716 return (-1);
1717 }
1718  
1719 static int
1720 dlpi_kread(register int fd, register off_t addr,
1721 register void *buf, register u_int len, register char *ebuf)
1722 {
1723 register int cc;
1724  
1725 if (lseek(fd, addr, SEEK_SET) < 0) {
1726 snprintf(ebuf, PCAP_ERRBUF_SIZE, "lseek: %s",
1727 pcap_strerror(errno));
1728 return (-1);
1729 }
1730 cc = read(fd, buf, len);
1731 if (cc < 0) {
1732 snprintf(ebuf, PCAP_ERRBUF_SIZE, "read: %s",
1733 pcap_strerror(errno));
1734 return (-1);
1735 } else if (cc != len) {
1736 snprintf(ebuf, PCAP_ERRBUF_SIZE, "short read (%d != %d)", cc,
1737 len);
1738 return (-1);
1739 }
1740 return (cc);
1741 }
1742 #endif
1743  
1744 pcap_t *
1745 pcap_create_interface(const char *device, char *ebuf)
1746 {
1747 pcap_t *p;
1748 #ifdef DL_HP_RAWDLS
1749 struct pcap_dlpi *pd;
1750 #endif
1751  
1752 p = pcap_create_common(device, ebuf, sizeof (struct pcap_dlpi));
1753 if (p == NULL)
1754 return (NULL);
1755  
1756 #ifdef DL_HP_RAWDLS
1757 pd = p->priv;
1758 pd->send_fd = -1; /* it hasn't been opened yet */
1759 #endif
1760  
1761 p->activate_op = pcap_activate_dlpi;
1762 return (p);
1763 }