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, 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 #include <config.h>
72
73 #include <sys/types.h>
74 #include <sys/time.h>
75 #ifdef HAVE_SYS_BUFMOD_H
76 #include <sys/bufmod.h>
77 #endif
78 #include <sys/dlpi.h>
79 #ifdef HAVE_SYS_DLPI_EXT_H
80 #include <sys/dlpi_ext.h>
81 #endif
82 #ifdef HAVE_HPUX9
83 #include <sys/socket.h>
84 #endif
85 #ifdef DL_HP_PPA_REQ
86 #include <sys/stat.h>
87 #endif
88 #include <sys/stream.h>
89 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
90 #include <sys/systeminfo.h>
91 #endif
92
93 #ifdef HAVE_HPUX9
94 #include <net/if.h>
95 #endif
96
97 #ifdef HAVE_HPUX9
98 #include <nlist.h>
99 #endif
100 #include <errno.h>
101 #include <fcntl.h>
102 #include <memory.h>
103 #include <stdio.h>
104 #include <stdlib.h>
105 #include <string.h>
106 #include <stropts.h>
107 #include <unistd.h>
108 #include <limits.h>
109
110 #include "pcap-int.h"
111 #include "dlpisubs.h"
112
113 #ifdef HAVE_OS_PROTO_H
114 #include "os-proto.h"
115 #endif
116
117 #if defined(__hpux)
118 /*
119 * HP-UX has a /dev/dlpi device; you open it and set the PPA of the actual
120 * network device you want.
121 */
122 #define HAVE_DEV_DLPI
123 #elif defined(_AIX)
124 /*
125 * AIX has a /dev/dlpi directory, with devices named after the interfaces
126 * underneath it.
127 */
128 #define PCAP_DEV_PREFIX "/dev/dlpi"
129 #elif defined(HAVE_SOLARIS)
130 /*
131 * Solaris has devices named after the interfaces underneath /dev.
132 */
133 #define PCAP_DEV_PREFIX "/dev"
134 #endif
135
136 #define MAXDLBUF 8192
137
138 /* Forwards */
139 static char *split_dname(char *, u_int *, char *);
140 static int dl_doattach(int, int, char *);
141 #ifdef DL_HP_RAWDLS
142 static int dl_dohpuxbind(int, char *);
143 #endif
144 static int dlpromiscon(pcap_t *, bpf_u_int32);
145 static int dlbindreq(int, bpf_u_int32, char *);
146 static int dlbindack(int, char *, char *, int *);
147 static int dlokack(int, const char *, char *, char *, int *);
148 static int dlinforeq(int, char *);
149 static int dlinfoack(int, char *, char *);
150
151 #ifdef HAVE_DL_PASSIVE_REQ_T
152 static void dlpassive(int, char *);
153 #endif
154
155 #ifdef DL_HP_RAWDLS
156 static int dlrawdatareq(int, const u_char *, int);
157 #endif
158 static int recv_ack(int, int, const char *, char *, char *, int *);
159 static char *dlstrerror(char *, size_t, bpf_u_int32);
160 static char *dlprim(char *, size_t, bpf_u_int32);
161 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
162 #define GET_RELEASE_BUFSIZE 32
163 static void get_release(char *, size_t, bpf_u_int32 *, bpf_u_int32 *,
164 bpf_u_int32 *);
165 #endif
166 static int send_request(int, char *, int, char *, char *);
167 #ifdef HAVE_HPUX9
168 static int dlpi_kread(int, off_t, void *, u_int, char *);
169 #endif
170 #ifdef HAVE_DEV_DLPI
171 static int get_dlpi_ppa(int, const char *, u_int, u_int *, char *);
172 #endif
173
174 /*
175 * Cast a buffer to "union DL_primitives" without provoking warnings
176 * from the compiler.
177 */
178 #define MAKE_DL_PRIMITIVES(ptr) ((union DL_primitives *)(void *)(ptr))
179
180 static int
pcap_read_dlpi(pcap_t * p,int cnt,pcap_handler callback,u_char * user)181 pcap_read_dlpi(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
182 {
183 int cc;
184 u_char *bp;
185 int flags;
186 bpf_u_int32 ctlbuf[MAXDLBUF];
187 struct strbuf ctl = {
188 MAXDLBUF,
189 0,
190 (char *)ctlbuf
191 };
192 struct strbuf data;
193
194 flags = 0;
195 cc = p->cc;
196 if (cc == 0) {
197 data.buf = (char *)p->buffer + p->offset;
198 data.maxlen = p->bufsize;
199 data.len = 0;
200 do {
201 /*
202 * Has "pcap_breakloop()" been called?
203 */
204 if (p->break_loop) {
205 /*
206 * Yes - clear the flag that indicates
207 * that it has, and return -2 to
208 * indicate that we were told to
209 * break out of the loop.
210 */
211 p->break_loop = 0;
212 return (-2);
213 }
214 /*
215 * XXX - check for the DLPI primitive, which
216 * would be DL_HP_RAWDATA_IND on HP-UX
217 * if we're in raw mode?
218 */
219 ctl.buf = (char *)ctlbuf;
220 ctl.maxlen = MAXDLBUF;
221 ctl.len = 0;
222 if (getmsg(p->fd, &ctl, &data, &flags) < 0) {
223 /* Don't choke when we get ptraced */
224 switch (errno) {
225
226 case EINTR:
227 cc = 0;
228 continue;
229
230 case EAGAIN:
231 return (0);
232 }
233 pcapint_fmt_errmsg_for_errno(p->errbuf,
234 sizeof(p->errbuf), errno, "getmsg");
235 return (-1);
236 }
237 cc = data.len;
238 } while (cc == 0);
239 bp = (u_char *)p->buffer + p->offset;
240 } else
241 bp = p->bp;
242
243 return (pcap_process_pkts(p, callback, user, cnt, bp, cc));
244 }
245
246 static int
pcap_inject_dlpi(pcap_t * p,const void * buf,int size)247 pcap_inject_dlpi(pcap_t *p, const void *buf, int size)
248 {
249 #ifdef DL_HP_RAWDLS
250 struct pcap_dlpi *pd = p->priv;
251 #endif
252 int ret;
253
254 #if defined(DLIOCRAW)
255 ret = write(p->fd, buf, size);
256 if (ret == -1) {
257 pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
258 errno, "send");
259 return (-1);
260 }
261 #elif defined(DL_HP_RAWDLS)
262 if (pd->send_fd < 0) {
263 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
264 "send: Output FD couldn't be opened");
265 return (-1);
266 }
267 ret = dlrawdatareq(pd->send_fd, buf, size);
268 if (ret == -1) {
269 pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
270 errno, "send");
271 return (-1);
272 }
273 /*
274 * putmsg() returns either 0 or -1; it doesn't indicate how
275 * many bytes were written (presumably they were all written
276 * or none of them were written). OpenBSD's pcap_inject()
277 * returns the number of bytes written, so, for API compatibility,
278 * we return the number of bytes we were told to write.
279 */
280 ret = size;
281 #else /* no raw mode */
282 /*
283 * XXX - this is a pain, because you might have to extract
284 * the address from the packet and use it in a DL_UNITDATA_REQ
285 * request. That would be dependent on the link-layer type.
286 *
287 * I also don't know what SAP you'd have to bind the descriptor
288 * to, or whether you'd need separate "receive" and "send" FDs,
289 * nor do I know whether you'd need different bindings for
290 * D/I/X Ethernet and 802.3, or for {FDDI,Token Ring} plus
291 * 802.2 and {FDDI,Token Ring} plus 802.2 plus SNAP.
292 *
293 * So, for now, we just return a "you can't send" indication,
294 * and leave it up to somebody with a DLPI-based system lacking
295 * both DLIOCRAW and DL_HP_RAWDLS to supply code to implement
296 * packet transmission on that system. If they do, they should
297 * send it to us - but should not send us code that assumes
298 * Ethernet; if the code doesn't work on non-Ethernet interfaces,
299 * it should check "p->linktype" and reject the send request if
300 * it's anything other than DLT_EN10MB.
301 */
302 pcapint_strlcpy(p->errbuf, "send: Not supported on this version of this OS",
303 PCAP_ERRBUF_SIZE);
304 ret = -1;
305 #endif /* raw mode */
306 return (ret);
307 }
308
309 #ifndef DL_IPATM
310 #define DL_IPATM 0x12 /* ATM Classical IP interface */
311 #endif
312
313 #ifdef HAVE_SOLARIS
314 /*
315 * For SunATM.
316 */
317 #ifndef A_GET_UNITS
318 #define A_GET_UNITS (('A'<<8)|118)
319 #endif /* A_GET_UNITS */
320 #ifndef A_PROMISCON_REQ
321 #define A_PROMISCON_REQ (('A'<<8)|121)
322 #endif /* A_PROMISCON_REQ */
323 #endif /* HAVE_SOLARIS */
324
325 static void
pcap_cleanup_dlpi(pcap_t * p)326 pcap_cleanup_dlpi(pcap_t *p)
327 {
328 #ifdef DL_HP_RAWDLS
329 struct pcap_dlpi *pd = p->priv;
330
331 if (pd->send_fd >= 0) {
332 close(pd->send_fd);
333 pd->send_fd = -1;
334 }
335 #endif
336 pcapint_cleanup_live_common(p);
337 }
338
339 #ifdef HAVE_DEV_DLPI
340 static int
handle_dev_dlpi_open_error(const char * ifname,int error,char * errbuf)341 handle_dev_dlpi_open_error(const char *ifname, int error, char *errbuf)
342 {
343 /*
344 * An attempt to open /dev/dlpi failed.
345 * Report the appropriate error.
346 */
347 if (error == ENOENT) {
348 /*
349 * Missing; I guess that means we don't support
350 * opening DLPI devices, and thus can't capture
351 * traffic at all.
352 */
353 snprintf(errbuf, PCAP_ERRBUF_SIZE,
354 "Capturing network traffic not supported - /dev/dlpi doesn't exist");
355 return (PCAP_ERROR_CAPTURE_NOTSUP);
356 } else if (error == EPERM || error == EACCES) {
357 /*
358 * We lack permission to open it.
359 *
360 * If the interface exists, report the permission error,
361 * otherwise report "no such interface".
362 */
363 int fd;
364 struct ifreq ifr;
365
366 if (strlen(ifname) >= sizeof(ifr.ifr_name)) {
367 /*
368 * The name is too long, so it can't possibly exist.
369 * Report that.
370 *
371 * There's nothing more to say, so clear
372 * the error message.
373 */
374 errbuf[0] = '\0';
375 return (PCAP_ERROR_NO_SUCH_DEVICE);
376 }
377
378 /*
379 * Try to get a socket on which to do an ioctl to get the
380 * interface's flags.
381 */
382 fd = socket(AF_INET, SOCK_DGRAM, 0);
383 if (fd < 0) {
384 /* That failed; report that as the error. */
385 pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
386 errno, "Can't open socket to get interface flags");
387 return (PCAP_ERROR);
388 }
389
390 pcapint_strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
391 if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
392 if (errno == ENXIO || errno == EINVAL) {
393 /*
394 * macOS, *BSD, and Solaris return one of
395 * those two errors if the device doesn't
396 * exist. Report that.
397 * XXX - what about HP-UX?
398 *
399 * There's nothing more to say, so clear
400 * the error message.
401 */
402 errbuf[0] = '\0';
403 close(fd);
404 return (PCAP_ERROR_NO_SUCH_DEVICE);
405 }
406
407 /*
408 * Some other error.
409 */
410 pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
411 errno, "Can't get interface flags");
412 close(fd);
413 return (PCAP_ERROR);
414 }
415
416 /*
417 * The device exists; report this as a permissions problem.
418 */
419 snprintf(errbuf, PCAP_ERRBUF_SIZE,
420 "Attempt to open /dev/dlpi failed with %s - root privilege may be required",
421 (error == EPERM) ? "EPERM" : "EACCES");
422 close(fd);
423 return (PCAP_ERROR_PERM_DENIED);
424 } else {
425 /*
426 * Soe other error.
427 */
428 pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
429 error, "Attempt to open /dev/dlpi failed");
430 return (PCAP_ERROR);
431 }
432 }
433 #else /* HAVE_DEV_DLPI */
434 static int
handle_dlpi_device_open_error(const char * ifname,const char * device,int error,char * errbuf)435 handle_dlpi_device_open_error(const char *ifname, const char *device,
436 int error, char *errbuf)
437 {
438 /*
439 * We couldn't open a DLPI device.
440 * Was that due to a permission error?
441 */
442 if (error == EPERM || error == EACCES) {
443 /*
444 * We lack permission to open it.
445 *
446 * If the interface doesn't exist, there wouldn't be
447 * a DLPI device corresponding to it, so we wouldn't
448 * have gotten a permissions error.
449 */
450 snprintf(errbuf, PCAP_ERRBUF_SIZE,
451 "Attempt to open %s failed with %s - root privilege may be required",
452 device, (error == EPERM) ? "EPERM" : "EACCES");
453 return (PCAP_ERROR_PERM_DENIED);
454 }
455
456 /*
457 * Was that due to the DLPI device not existing?
458 */
459 if (error != ENOENT) {
460 /*
461 * No; report it as a generic error, giving the error
462 * message for the error code and the name of the
463 * device we tried to open.
464 */
465 pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
466 error, "Attempt to open %s failed", device);
467 return (PCAP_ERROR);
468 }
469
470 /*
471 * Yes. That means we can't do DLPI capturing, at least not
472 * on that interface.
473 *
474 * Test whether it exists and, if it does, whether it's
475 * a loopback interface.
476 */
477 return (handle_nonexistent_dlpi_device(ifname, errbuf));
478 }
479 #endif /* not HAVE_DEV_DLPI */
480
481 static int
open_dlpi_device(const char * name,u_int * ppa,char * errbuf)482 open_dlpi_device(const char *name, u_int *ppa, char *errbuf)
483 {
484 char dname[100];
485 char *cp, *cq;
486 int fd;
487 #ifdef HAVE_DEV_DLPI
488 int status;
489 u_int unit;
490 #else
491 char dname2[100];
492 #endif
493
494 #ifdef HAVE_DEV_DLPI
495 /*
496 ** Remove any "/dev/" on the front of the device.
497 */
498 cp = strrchr(name, '/');
499 if (cp == NULL)
500 pcapint_strlcpy(dname, name, sizeof(dname));
501 else
502 pcapint_strlcpy(dname, cp + 1, sizeof(dname));
503
504 /*
505 * If this name has a colon followed by a number at
506 * the end, it's a logical interface. Those are just
507 * the way you assign multiple IP addresses to a real
508 * interface, so an entry for a logical interface should
509 * be treated like the entry for the real interface;
510 * we do that by stripping off the ":" and the number.
511 */
512 cp = strchr(dname, ':');
513 if (cp != NULL) {
514 /*
515 * We have a ":"; is it followed by a number?
516 */
517 cq = cp + 1;
518 while (PCAP_ISDIGIT(*cq))
519 cq++;
520 if (*cq == '\0') {
521 /*
522 * All digits after the ":" until the end.
523 * Strip off the ":" and everything after
524 * it.
525 */
526 *cp = '\0';
527 }
528 }
529
530 /*
531 * Split the device name into a device type name and a unit number;
532 * chop off the unit number, so "dname" is just a device type name.
533 */
534 cp = split_dname(dname, &unit, errbuf);
535 if (cp == NULL) {
536 /*
537 * split_dname() has filled in the error message.
538 */
539 return (PCAP_ERROR_NO_SUCH_DEVICE);
540 }
541 *cp = '\0';
542
543 /*
544 * Use "/dev/dlpi" as the device.
545 *
546 * XXX - HP's DLPI Programmer's Guide for HP-UX 11.00 says that
547 * the "dl_mjr_num" field is for the "major number of interface
548 * driver"; that's the major of "/dev/dlpi" on the system on
549 * which I tried this, but there may be DLPI devices that
550 * use a different driver, in which case we may need to
551 * search "/dev" for the appropriate device with that major
552 * device number, rather than hardwiring "/dev/dlpi".
553 */
554 if ((fd = open("/dev/dlpi", O_RDWR)) < 0)
555 return (handle_dev_dlpi_open_error(name, errno, errbuf));
556
557 /*
558 * Get a table of all PPAs for that device, and search that
559 * table for the specified device type name and unit number.
560 */
561 status = get_dlpi_ppa(fd, dname, unit, ppa, errbuf);
562 if (status < 0) {
563 close(fd);
564 return (status);
565 }
566 #else
567 /*
568 * If the device name begins with "/", assume it begins with
569 * the pathname of the directory containing the device to open;
570 * otherwise, concatenate the device directory name and the
571 * device name.
572 */
573 if (*name == '/')
574 pcapint_strlcpy(dname, name, sizeof(dname));
575 else
576 snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX,
577 name);
578
579 /*
580 * If this name has a colon followed by a number at
581 * the end, it's a logical interface. Those are just
582 * the way you assign multiple IP addresses to a real
583 * interface, so an entry for a logical interface should
584 * be treated like the entry for the real interface;
585 * we do that by stripping off the ":" and the number.
586 */
587 cp = strchr(dname, ':');
588 if (cp != NULL) {
589 /*
590 * We have a ":"; is it followed by a number?
591 */
592 cq = cp + 1;
593 while (PCAP_ISDIGIT(*cq))
594 cq++;
595 if (*cq == '\0') {
596 /*
597 * All digits after the ":" until the end.
598 * Strip off the ":" and everything after
599 * it.
600 */
601 *cp = '\0';
602 }
603 }
604
605 /*
606 * Get the unit number, and a pointer to the end of the device
607 * type name.
608 */
609 cp = split_dname(dname, ppa, errbuf);
610 if (cp == NULL) {
611 /*
612 * split_dname() has filled in the error message.
613 */
614 return (PCAP_ERROR_NO_SUCH_DEVICE);
615 }
616
617 /*
618 * Make a copy of the device pathname, and then remove the unit
619 * number from the device pathname.
620 */
621 pcapint_strlcpy(dname2, dname, sizeof(dname));
622 *cp = '\0';
623
624 /* Try device without unit number */
625 if ((fd = open(dname, O_RDWR)) < 0) {
626 if (errno != ENOENT)
627 return (handle_dlpi_device_open_error(name, dname,
628 errno, errbuf));
629
630 /*
631 * There's no DLPI device whose name is the interface
632 * name with the unit number removed.
633 *
634 * Try again with a device name that includes the
635 * unit number.
636 */
637 if ((fd = open(dname2, O_RDWR)) < 0)
638 return (handle_dlpi_device_open_error(name, dname2,
639 errno, errbuf));
640 /* XXX Assume unit zero */
641 *ppa = 0;
642 }
643 #endif
644 return (fd);
645 }
646
647 static int
pcap_activate_dlpi(pcap_t * p)648 pcap_activate_dlpi(pcap_t *p)
649 {
650 #ifdef DL_HP_RAWDLS
651 struct pcap_dlpi *pd = p->priv;
652 #endif
653 int status = 0;
654 int retv;
655 u_int ppa;
656 #ifdef HAVE_SOLARIS
657 int isatm = 0;
658 #endif
659 register dl_info_ack_t *infop;
660 #ifdef HAVE_SYS_BUFMOD_H
661 bpf_u_int32 ss;
662 #ifdef HAVE_SOLARIS
663 char release[GET_RELEASE_BUFSIZE];
664 bpf_u_int32 osmajor, osminor, osmicro;
665 #endif
666 #endif
667 bpf_u_int32 buf[MAXDLBUF];
668
669 p->fd = open_dlpi_device(p->opt.device, &ppa, p->errbuf);
670 if (p->fd < 0) {
671 status = p->fd;
672 goto bad;
673 }
674
675 #ifdef DL_HP_RAWDLS
676 /*
677 * XXX - HP-UX 10.20 and 11.xx don't appear to support sending and
678 * receiving packets on the same descriptor - you need separate
679 * descriptors for sending and receiving, bound to different SAPs.
680 *
681 * If the open fails, we just leave -1 in "pd->send_fd" and reject
682 * attempts to send packets, just as if, in pcap-bpf.c, we fail
683 * to open the BPF device for reading and writing, we just try
684 * to open it for reading only and, if that succeeds, just let
685 * the send attempts fail.
686 */
687 pd->send_fd = open("/dev/dlpi", O_RDWR);
688 #endif
689
690 /*
691 ** Attach if "style 2" provider
692 */
693 if (dlinforeq(p->fd, p->errbuf) < 0 ||
694 dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) {
695 status = PCAP_ERROR;
696 goto bad;
697 }
698 infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
699 #ifdef HAVE_SOLARIS
700 if (infop->dl_mac_type == DL_IPATM)
701 isatm = 1;
702 #endif
703 if (infop->dl_provider_style == DL_STYLE2) {
704 retv = dl_doattach(p->fd, ppa, p->errbuf);
705 if (retv < 0) {
706 status = retv;
707 goto bad;
708 }
709 #ifdef DL_HP_RAWDLS
710 if (pd->send_fd >= 0) {
711 retv = dl_doattach(pd->send_fd, ppa, p->errbuf);
712 if (retv < 0) {
713 status = retv;
714 goto bad;
715 }
716 }
717 #endif
718 }
719
720 if (p->opt.rfmon) {
721 /*
722 * This device exists, but we don't support monitor mode
723 * any platforms that support DLPI.
724 */
725 status = PCAP_ERROR_RFMON_NOTSUP;
726 goto bad;
727 }
728
729 #ifdef HAVE_DL_PASSIVE_REQ_T
730 /*
731 * Enable Passive mode to be able to capture on aggregated link.
732 * Not supported in all Solaris versions.
733 */
734 dlpassive(p->fd, p->errbuf);
735 #endif
736 /*
737 ** Bind (defer if using HP-UX 9 or HP-UX 10.20 or later, totally
738 ** skip if using SINIX)
739 */
740 #if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20_OR_LATER) && !defined(sinix)
741 #ifdef _AIX
742 /*
743 ** AIX.
744 ** According to IBM's AIX Support Line, the dl_sap value
745 ** should not be less than 0x600 (1536) for standard Ethernet.
746 ** However, we seem to get DL_BADADDR - "DLSAP addr in improper
747 ** format or invalid" - errors if we use 1537 on the "tr0"
748 ** device, which, given that its name starts with "tr" and that
749 ** it's IBM, probably means a Token Ring device. (Perhaps we
750 ** need to use 1537 on "/dev/dlpi/en" because that device is for
751 ** D/I/X Ethernet, the "SAP" is actually an Ethernet type, and
752 ** it rejects invalid Ethernet types.)
753 **
754 ** So if 1537 fails, we try 2, as Hyung Sik Yoon of IBM Korea
755 ** says that works on Token Ring (he says that 0 does *not*
756 ** work; perhaps that's considered an invalid LLC SAP value - I
757 ** assume the SAP value in a DLPI bind is an LLC SAP for network
758 ** types that use 802.2 LLC).
759 */
760 if ((dlbindreq(p->fd, 1537, p->errbuf) < 0 &&
761 dlbindreq(p->fd, 2, p->errbuf) < 0) ||
762 dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) {
763 status = PCAP_ERROR;
764 goto bad;
765 }
766 #elif defined(DL_HP_RAWDLS)
767 /*
768 ** HP-UX 10.0x and 10.1x.
769 */
770 if (dl_dohpuxbind(p->fd, p->errbuf) < 0) {
771 status = PCAP_ERROR;
772 goto bad;
773 }
774 if (pd->send_fd >= 0) {
775 /*
776 ** XXX - if this fails, just close send_fd and
777 ** set it to -1, so that you can't send but can
778 ** still receive?
779 */
780 if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) {
781 status = PCAP_ERROR;
782 goto bad;
783 }
784 }
785 #else /* neither AIX nor HP-UX */
786 /*
787 ** Not Sinix, and neither AIX nor HP-UX - Solaris, and any other
788 ** OS using DLPI.
789 **/
790 if (dlbindreq(p->fd, 0, p->errbuf) < 0 ||
791 dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) {
792 status = PCAP_ERROR;
793 goto bad;
794 }
795 #endif /* AIX vs. HP-UX vs. other */
796 #endif /* !HP-UX 9 and !HP-UX 10.20 or later and !SINIX */
797
798 /*
799 * Turn a negative snapshot value (invalid), a snapshot value of
800 * 0 (unspecified), or a value bigger than the normal maximum
801 * value, into the maximum allowed value.
802 *
803 * If some application really *needs* a bigger snapshot
804 * length, we should just increase MAXIMUM_SNAPLEN.
805 */
806 if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
807 p->snapshot = MAXIMUM_SNAPLEN;
808
809 #ifdef HAVE_SOLARIS
810 if (isatm) {
811 /*
812 ** Have to turn on some special ATM promiscuous mode
813 ** for SunATM.
814 ** Do *NOT* turn regular promiscuous mode on; it doesn't
815 ** help, and may break things.
816 */
817 if (strioctl(p->fd, A_PROMISCON_REQ, 0, NULL) < 0) {
818 status = PCAP_ERROR;
819 pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
820 errno, "A_PROMISCON_REQ");
821 goto bad;
822 }
823 } else
824 #endif
825 if (p->opt.promisc) {
826 /*
827 ** Enable promiscuous (not necessary on send FD)
828 */
829 retv = dlpromiscon(p, DL_PROMISC_PHYS);
830 if (retv < 0) {
831 if (retv == PCAP_ERROR_PERM_DENIED)
832 status = PCAP_ERROR_PROMISC_PERM_DENIED;
833 else
834 status = retv;
835 goto bad;
836 }
837
838 /*
839 ** Try to enable multicast (you would have thought
840 ** promiscuous would be sufficient). (Skip if using
841 ** HP-UX or SINIX) (Not necessary on send FD)
842 */
843 #if !defined(__hpux) && !defined(sinix)
844 retv = dlpromiscon(p, DL_PROMISC_MULTI);
845 if (retv < 0)
846 status = PCAP_WARNING;
847 #endif
848 }
849 /*
850 ** Try to enable SAP promiscuity (when not in promiscuous mode
851 ** when using HP-UX, when not doing SunATM on Solaris, and never
852 ** under SINIX) (Not necessary on send FD)
853 */
854 #ifndef sinix
855 #if defined(__hpux)
856 /* HP-UX - only do this when not in promiscuous mode */
857 if (!p->opt.promisc) {
858 #elif defined(HAVE_SOLARIS)
859 /* Solaris - don't do this on SunATM devices */
860 if (!isatm) {
861 #else
862 /* Everything else (except for SINIX) - always do this */
863 {
864 #endif
865 retv = dlpromiscon(p, DL_PROMISC_SAP);
866 if (retv < 0) {
867 if (p->opt.promisc) {
868 /*
869 * Not fatal, since the DL_PROMISC_PHYS mode
870 * worked.
871 *
872 * Report it as a warning, however.
873 */
874 status = PCAP_WARNING;
875 } else {
876 /*
877 * Fatal.
878 */
879 status = retv;
880 goto bad;
881 }
882 }
883 }
884 #endif /* sinix */
885
886 /*
887 ** HP-UX 9, and HP-UX 10.20 or later, must bind after setting
888 ** promiscuous options.
889 */
890 #if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20_OR_LATER)
891 if (dl_dohpuxbind(p->fd, p->errbuf) < 0) {
892 status = PCAP_ERROR;
893 goto bad;
894 }
895 /*
896 ** We don't set promiscuous mode on the send FD, but we'll defer
897 ** binding it anyway, just to keep the HP-UX 9/10.20 or later
898 ** code together.
899 */
900 if (pd->send_fd >= 0) {
901 /*
902 ** XXX - if this fails, just close send_fd and
903 ** set it to -1, so that you can't send but can
904 ** still receive?
905 */
906 if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) {
907 status = PCAP_ERROR;
908 goto bad;
909 }
910 }
911 #endif
912
913 /*
914 ** Determine link type
915 ** XXX - get SAP length and address length as well, for use
916 ** when sending packets.
917 */
918 if (dlinforeq(p->fd, p->errbuf) < 0 ||
919 dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) {
920 status = PCAP_ERROR;
921 goto bad;
922 }
923
924 infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
925 if (pcap_process_mactype(p, infop->dl_mac_type) != 0) {
926 status = PCAP_ERROR;
927 goto bad;
928 }
929
930 #ifdef DLIOCRAW
931 /*
932 ** This is a non standard SunOS hack to get the full raw link-layer
933 ** header.
934 */
935 if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) {
936 status = PCAP_ERROR;
937 pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
938 errno, "DLIOCRAW");
939 goto bad;
940 }
941 #endif
942
943 #ifdef HAVE_SYS_BUFMOD_H
944 ss = p->snapshot;
945
946 /*
947 ** There is a bug in bufmod(7). When dealing with messages of
948 ** less than snaplen size it strips data from the beginning not
949 ** the end.
950 **
951 ** This bug is fixed in 5.3.2. Also, there is a patch available.
952 ** Ask for bugid 1149065.
953 */
954 #ifdef HAVE_SOLARIS
955 get_release(release, sizeof (release), &osmajor, &osminor, &osmicro);
956 if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) &&
957 getenv("BUFMOD_FIXED") == NULL) {
958 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
959 "WARNING: bufmod is broken in SunOS %s; ignoring snaplen.",
960 release);
961 ss = 0;
962 status = PCAP_WARNING;
963 }
964 #endif
965
966 /* Push and configure bufmod. */
967 if (pcap_conf_bufmod(p, ss) != 0) {
968 status = PCAP_ERROR;
969 goto bad;
970 }
971 #endif
972
973 /*
974 ** As the last operation flush the read side.
975 */
976 if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
977 status = PCAP_ERROR;
978 pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
979 errno, "FLUSHR");
980 goto bad;
981 }
982
983 /* Allocate data buffer. */
984 if (pcap_alloc_databuf(p) != 0) {
985 status = PCAP_ERROR;
986 goto bad;
987 }
988
989 /*
990 * Success.
991 *
992 * "p->fd" is an FD for a STREAMS device, so "select()" and
993 * "poll()" should work on it.
994 */
995 p->selectable_fd = p->fd;
996
997 p->read_op = pcap_read_dlpi;
998 p->inject_op = pcap_inject_dlpi;
999 p->setfilter_op = pcapint_install_bpf_program; /* no kernel filtering */
1000 p->setdirection_op = NULL; /* Not implemented.*/
1001 p->set_datalink_op = NULL; /* can't change data link type */
1002 p->getnonblock_op = pcapint_getnonblock_fd;
1003 p->setnonblock_op = pcapint_setnonblock_fd;
1004 p->stats_op = pcap_stats_dlpi;
1005 p->cleanup_op = pcap_cleanup_dlpi;
1006
1007 return (status);
1008 bad:
1009 pcap_cleanup_dlpi(p);
1010 return (status);
1011 }
1012
1013 /*
1014 * Split a device name into a device type name and a unit number;
1015 * return the a pointer to the beginning of the unit number, which
1016 * is the end of the device type name, and set "*unitp" to the unit
1017 * number.
1018 *
1019 * Returns NULL on error, and fills "ebuf" with an error message.
1020 */
1021 static char *
1022 split_dname(char *device, u_int *unitp, char *ebuf)
1023 {
1024 char *cp;
1025 char *eos;
1026 long unit;
1027
1028 /*
1029 * Look for a number at the end of the device name string.
1030 */
1031 cp = device + strlen(device) - 1;
1032 if (*cp < '0' || *cp > '9') {
1033 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s missing unit number",
1034 device);
1035 return (NULL);
1036 }
1037
1038 /* Digits at end of string are unit number */
1039 while (cp-1 >= device && *(cp-1) >= '0' && *(cp-1) <= '9')
1040 cp--;
1041 if (cp == device || *(cp-1) == '/') {
1042 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s has only a unit number",
1043 device);
1044 return (NULL);
1045 }
1046
1047 errno = 0;
1048 unit = strtol(cp, &eos, 10);
1049 if (*eos != '\0') {
1050 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s bad unit number", device);
1051 return (NULL);
1052 }
1053 if (errno == ERANGE || unit > INT_MAX) {
1054 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number too large",
1055 device);
1056 return (NULL);
1057 }
1058 if (unit < 0) {
1059 snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number is negative",
1060 device);
1061 return (NULL);
1062 }
1063 *unitp = (u_int)unit;
1064 return (cp);
1065 }
1066
1067 static int
1068 dl_doattach(int fd, int ppa, char *ebuf)
1069 {
1070 dl_attach_req_t req;
1071 bpf_u_int32 buf[MAXDLBUF];
1072 int err;
1073
1074 req.dl_primitive = DL_ATTACH_REQ;
1075 req.dl_ppa = ppa;
1076 if (send_request(fd, (char *)&req, sizeof(req), "attach", ebuf) < 0)
1077 return (PCAP_ERROR);
1078
1079 err = dlokack(fd, "attach", (char *)buf, ebuf, NULL);
1080 if (err < 0)
1081 return (err);
1082 return (0);
1083 }
1084
1085 #ifdef DL_HP_RAWDLS
1086 static int
1087 dl_dohpuxbind(int fd, char *ebuf)
1088 {
1089 int hpsap;
1090 int uerror;
1091 bpf_u_int32 buf[MAXDLBUF];
1092
1093 /*
1094 * XXX - we start at 22 because we used to use only 22, but
1095 * that was just because that was the value used in some
1096 * sample code from HP. With what value *should* we start?
1097 * Does it matter, given that we're enabling SAP promiscuity
1098 * on the input FD?
1099 */
1100 hpsap = 22;
1101 for (;;) {
1102 if (dlbindreq(fd, hpsap, ebuf) < 0)
1103 return (-1);
1104 if (dlbindack(fd, (char *)buf, ebuf, &uerror) >= 0)
1105 break;
1106 /*
1107 * For any error other than a UNIX EBUSY, give up.
1108 */
1109 if (uerror != EBUSY) {
1110 /*
1111 * dlbindack() has already filled in ebuf for
1112 * this error.
1113 */
1114 return (-1);
1115 }
1116
1117 /*
1118 * For EBUSY, try the next SAP value; that means that
1119 * somebody else is using that SAP. Clear ebuf so
1120 * that application doesn't report the "Device busy"
1121 * error as a warning.
1122 */
1123 *ebuf = '\0';
1124 hpsap++;
1125 if (hpsap > 100) {
1126 pcapint_strlcpy(ebuf,
1127 "All SAPs from 22 through 100 are in use",
1128 PCAP_ERRBUF_SIZE);
1129 return (-1);
1130 }
1131 }
1132 return (0);
1133 }
1134 #endif
1135
1136 #define STRINGIFY(n) #n
1137
1138 static int
1139 dlpromiscon(pcap_t *p, bpf_u_int32 level)
1140 {
1141 dl_promiscon_req_t req;
1142 bpf_u_int32 buf[MAXDLBUF];
1143 int err;
1144 int uerror;
1145
1146 req.dl_primitive = DL_PROMISCON_REQ;
1147 req.dl_level = level;
1148 if (send_request(p->fd, (char *)&req, sizeof(req), "promiscon",
1149 p->errbuf) < 0)
1150 return (PCAP_ERROR);
1151 err = dlokack(p->fd, "promiscon" STRINGIFY(level), (char *)buf,
1152 p->errbuf, &uerror);
1153 if (err < 0) {
1154 if (err == PCAP_ERROR_PERM_DENIED) {
1155 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
1156 "Attempt to set promiscuous mode failed with %s - root privilege may be required",
1157 (uerror == EPERM) ? "EPERM" : "EACCES");
1158 err = PCAP_ERROR_PROMISC_PERM_DENIED;
1159 }
1160 return (err);
1161 }
1162 return (0);
1163 }
1164
1165 /*
1166 * Show all interfaces, so users don't ask "why is this interface not
1167 * showing up?" or "why are no interfaces showing up?" We report
1168 * PCAP_ERROR_CAPTURE_NOTSUP if there's no DLPI device, with an
1169 * error message that tries to explain the source of the problem,
1170 * which is some flavor of "sorry, that's simply not supported by
1171 * your OS".
1172 */
1173 static int
1174 show_them_all(const char *name _U_)
1175 {
1176 return (1);
1177 }
1178
1179 static int
1180 get_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_)
1181 {
1182 /*
1183 * Nothing we can do other than mark loopback devices as "the
1184 * connected/disconnected status doesn't apply".
1185 *
1186 * XXX - on Solaris, can we do what the dladm command does,
1187 * i.e. get a connected/disconnected indication from a kstat?
1188 * (Note that you can also get the link speed, and possibly
1189 * other information, from a kstat as well.)
1190 */
1191 if (*flags & PCAP_IF_LOOPBACK) {
1192 /*
1193 * Loopback devices aren't wireless, and "connected"/
1194 * "disconnected" doesn't apply to them.
1195 */
1196 *flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
1197 return (0);
1198 }
1199 return (0);
1200 }
1201
1202 int
1203 pcapint_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
1204 {
1205 #ifdef HAVE_SOLARIS
1206 int fd;
1207 union {
1208 u_int nunits;
1209 char pad[516]; /* XXX - must be at least 513; is 516
1210 in "atmgetunits" */
1211 } buf;
1212 char baname[2+1+1];
1213 u_int i;
1214 #endif
1215
1216 /*
1217 * Get the list of regular interfaces first.
1218 */
1219 if (pcapint_findalldevs_interfaces(devlistp, errbuf, show_them_all,
1220 get_if_flags) == -1)
1221 return (-1); /* failure */
1222
1223 #ifdef HAVE_SOLARIS
1224 /*
1225 * We may have to do special magic to get ATM devices.
1226 */
1227 if ((fd = open("/dev/ba", O_RDWR)) < 0) {
1228 /*
1229 * We couldn't open the "ba" device.
1230 * For now, just give up; perhaps we should
1231 * return an error if the problem is neither
1232 * a "that device doesn't exist" error (ENOENT,
1233 * ENXIO, etc.) or a "you're not allowed to do
1234 * that" error (EPERM, EACCES).
1235 */
1236 return (0);
1237 }
1238
1239 if (strioctl(fd, A_GET_UNITS, sizeof(buf), (char *)&buf) < 0) {
1240 pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1241 errno, "A_GET_UNITS");
1242 return (-1);
1243 }
1244 for (i = 0; i < buf.nunits; i++) {
1245 snprintf(baname, sizeof baname, "ba%u", i);
1246 /*
1247 * XXX - is there a notion of "up" and "running"?
1248 * And is there a way to determine whether the
1249 * interface is plugged into a network?
1250 */
1251 if (pcapint_add_dev(devlistp, baname, 0, NULL, errbuf) == NULL)
1252 return (-1);
1253 }
1254 #endif
1255
1256 return (0);
1257 }
1258
1259 static int
1260 send_request(int fd, char *ptr, int len, char *what, char *ebuf)
1261 {
1262 struct strbuf ctl;
1263 int flags;
1264
1265 ctl.maxlen = 0;
1266 ctl.len = len;
1267 ctl.buf = ptr;
1268
1269 flags = 0;
1270 if (putmsg(fd, &ctl, (struct strbuf *) NULL, flags) < 0) {
1271 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1272 errno, "send_request: putmsg \"%s\"", what);
1273 return (-1);
1274 }
1275 return (0);
1276 }
1277
1278 static int
1279 recv_ack(int fd, int size, const char *what, char *bufp, char *ebuf, int *uerror)
1280 {
1281 union DL_primitives *dlp;
1282 struct strbuf ctl;
1283 int flags;
1284 char errmsgbuf[PCAP_ERRBUF_SIZE];
1285 char dlprimbuf[64];
1286
1287 /*
1288 * Clear out "*uerror", so it's only set for DL_ERROR_ACK/DL_SYSERR,
1289 * making that the only place where EBUSY is treated specially.
1290 */
1291 if (uerror != NULL)
1292 *uerror = 0;
1293
1294 ctl.maxlen = MAXDLBUF;
1295 ctl.len = 0;
1296 ctl.buf = bufp;
1297
1298 flags = 0;
1299 if (getmsg(fd, &ctl, (struct strbuf*)NULL, &flags) < 0) {
1300 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1301 errno, "recv_ack: %s getmsg", what);
1302 return (PCAP_ERROR);
1303 }
1304
1305 dlp = MAKE_DL_PRIMITIVES(ctl.buf);
1306 switch (dlp->dl_primitive) {
1307
1308 case DL_INFO_ACK:
1309 case DL_BIND_ACK:
1310 case DL_OK_ACK:
1311 #ifdef DL_HP_PPA_ACK
1312 case DL_HP_PPA_ACK:
1313 #endif
1314 /* These are OK */
1315 break;
1316
1317 case DL_ERROR_ACK:
1318 switch (dlp->error_ack.dl_errno) {
1319
1320 case DL_SYSERR:
1321 if (uerror != NULL)
1322 *uerror = dlp->error_ack.dl_unix_errno;
1323 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1324 dlp->error_ack.dl_unix_errno,
1325 "recv_ack: %s: UNIX error", what);
1326 if (dlp->error_ack.dl_unix_errno == EPERM ||
1327 dlp->error_ack.dl_unix_errno == EACCES)
1328 return (PCAP_ERROR_PERM_DENIED);
1329 break;
1330
1331 default:
1332 /*
1333 * Neither EPERM nor EACCES.
1334 */
1335 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1336 "recv_ack: %s: %s", what,
1337 dlstrerror(errmsgbuf, sizeof (errmsgbuf), dlp->error_ack.dl_errno));
1338 if (dlp->error_ack.dl_errno == DL_BADPPA)
1339 return (PCAP_ERROR_NO_SUCH_DEVICE);
1340 else if (dlp->error_ack.dl_errno == DL_ACCESS)
1341 return (PCAP_ERROR_PERM_DENIED);
1342 break;
1343 }
1344 return (PCAP_ERROR);
1345
1346 default:
1347 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1348 "recv_ack: %s: Unexpected primitive ack %s",
1349 what, dlprim(dlprimbuf, sizeof (dlprimbuf), dlp->dl_primitive));
1350 return (PCAP_ERROR);
1351 }
1352
1353 if (ctl.len < size) {
1354 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1355 "recv_ack: %s: Ack too small (%d < %d)",
1356 what, ctl.len, size);
1357 return (PCAP_ERROR);
1358 }
1359 return (ctl.len);
1360 }
1361
1362 static char *
1363 dlstrerror(char *errbuf, size_t errbufsize, bpf_u_int32 dl_errno)
1364 {
1365 switch (dl_errno) {
1366
1367 case DL_ACCESS:
1368 return ("Improper permissions for request");
1369
1370 case DL_BADADDR:
1371 return ("DLSAP addr in improper format or invalid");
1372
1373 case DL_BADCORR:
1374 return ("Seq number not from outstand DL_CONN_IND");
1375
1376 case DL_BADDATA:
1377 return ("User data exceeded provider limit");
1378
1379 case DL_BADPPA:
1380 #ifdef HAVE_DEV_DLPI
1381 /*
1382 * With a single "/dev/dlpi" device used for all
1383 * DLPI providers, PPAs have nothing to do with
1384 * unit numbers.
1385 */
1386 return ("Specified PPA was invalid");
1387 #else
1388 /*
1389 * We have separate devices for separate devices;
1390 * the PPA is just the unit number.
1391 */
1392 return ("Specified PPA (device unit) was invalid");
1393 #endif
1394
1395 case DL_BADPRIM:
1396 return ("Primitive received not known by provider");
1397
1398 case DL_BADQOSPARAM:
1399 return ("QOS parameters contained invalid values");
1400
1401 case DL_BADQOSTYPE:
1402 return ("QOS structure type is unknown/unsupported");
1403
1404 case DL_BADSAP:
1405 return ("Bad LSAP selector");
1406
1407 case DL_BADTOKEN:
1408 return ("Token used not an active stream");
1409
1410 case DL_BOUND:
1411 return ("Attempted second bind with dl_max_conind");
1412
1413 case DL_INITFAILED:
1414 return ("Physical link initialization failed");
1415
1416 case DL_NOADDR:
1417 return ("Provider couldn't allocate alternate address");
1418
1419 case DL_NOTINIT:
1420 return ("Physical link not initialized");
1421
1422 case DL_OUTSTATE:
1423 return ("Primitive issued in improper state");
1424
1425 case DL_SYSERR:
1426 return ("UNIX system error occurred");
1427
1428 case DL_UNSUPPORTED:
1429 return ("Requested service not supplied by provider");
1430
1431 case DL_UNDELIVERABLE:
1432 return ("Previous data unit could not be delivered");
1433
1434 case DL_NOTSUPPORTED:
1435 return ("Primitive is known but not supported");
1436
1437 case DL_TOOMANY:
1438 return ("Limit exceeded");
1439
1440 case DL_NOTENAB:
1441 return ("Promiscuous mode not enabled");
1442
1443 case DL_BUSY:
1444 return ("Other streams for PPA in post-attached");
1445
1446 case DL_NOAUTO:
1447 return ("Automatic handling XID&TEST not supported");
1448
1449 case DL_NOXIDAUTO:
1450 return ("Automatic handling of XID not supported");
1451
1452 case DL_NOTESTAUTO:
1453 return ("Automatic handling of TEST not supported");
1454
1455 case DL_XIDAUTO:
1456 return ("Automatic handling of XID response");
1457
1458 case DL_TESTAUTO:
1459 return ("Automatic handling of TEST response");
1460
1461 case DL_PENDING:
1462 return ("Pending outstanding connect indications");
1463
1464 default:
1465 snprintf(errbuf, errbufsize, "Error %02x", dl_errno);
1466 return (errbuf);
1467 }
1468 }
1469
1470 static char *
1471 dlprim(char *primbuf, size_t primbufsize, bpf_u_int32 prim)
1472 {
1473 switch (prim) {
1474
1475 case DL_INFO_REQ:
1476 return ("DL_INFO_REQ");
1477
1478 case DL_INFO_ACK:
1479 return ("DL_INFO_ACK");
1480
1481 case DL_ATTACH_REQ:
1482 return ("DL_ATTACH_REQ");
1483
1484 case DL_DETACH_REQ:
1485 return ("DL_DETACH_REQ");
1486
1487 case DL_BIND_REQ:
1488 return ("DL_BIND_REQ");
1489
1490 case DL_BIND_ACK:
1491 return ("DL_BIND_ACK");
1492
1493 case DL_UNBIND_REQ:
1494 return ("DL_UNBIND_REQ");
1495
1496 case DL_OK_ACK:
1497 return ("DL_OK_ACK");
1498
1499 case DL_ERROR_ACK:
1500 return ("DL_ERROR_ACK");
1501
1502 case DL_SUBS_BIND_REQ:
1503 return ("DL_SUBS_BIND_REQ");
1504
1505 case DL_SUBS_BIND_ACK:
1506 return ("DL_SUBS_BIND_ACK");
1507
1508 case DL_UNITDATA_REQ:
1509 return ("DL_UNITDATA_REQ");
1510
1511 case DL_UNITDATA_IND:
1512 return ("DL_UNITDATA_IND");
1513
1514 case DL_UDERROR_IND:
1515 return ("DL_UDERROR_IND");
1516
1517 case DL_UDQOS_REQ:
1518 return ("DL_UDQOS_REQ");
1519
1520 case DL_CONNECT_REQ:
1521 return ("DL_CONNECT_REQ");
1522
1523 case DL_CONNECT_IND:
1524 return ("DL_CONNECT_IND");
1525
1526 case DL_CONNECT_RES:
1527 return ("DL_CONNECT_RES");
1528
1529 case DL_CONNECT_CON:
1530 return ("DL_CONNECT_CON");
1531
1532 case DL_TOKEN_REQ:
1533 return ("DL_TOKEN_REQ");
1534
1535 case DL_TOKEN_ACK:
1536 return ("DL_TOKEN_ACK");
1537
1538 case DL_DISCONNECT_REQ:
1539 return ("DL_DISCONNECT_REQ");
1540
1541 case DL_DISCONNECT_IND:
1542 return ("DL_DISCONNECT_IND");
1543
1544 case DL_RESET_REQ:
1545 return ("DL_RESET_REQ");
1546
1547 case DL_RESET_IND:
1548 return ("DL_RESET_IND");
1549
1550 case DL_RESET_RES:
1551 return ("DL_RESET_RES");
1552
1553 case DL_RESET_CON:
1554 return ("DL_RESET_CON");
1555
1556 default:
1557 snprintf(primbuf, primbufsize, "unknown primitive 0x%x",
1558 prim);
1559 return (primbuf);
1560 }
1561 }
1562
1563 static int
1564 dlbindreq(int fd, bpf_u_int32 sap, char *ebuf)
1565 {
1566
1567 dl_bind_req_t req;
1568
1569 memset((char *)&req, 0, sizeof(req));
1570 req.dl_primitive = DL_BIND_REQ;
1571 /* XXX - what if neither of these are defined? */
1572 #if defined(DL_HP_RAWDLS)
1573 req.dl_max_conind = 1; /* XXX magic number */
1574 req.dl_service_mode = DL_HP_RAWDLS;
1575 #elif defined(DL_CLDLS)
1576 req.dl_service_mode = DL_CLDLS;
1577 #endif
1578 req.dl_sap = sap;
1579
1580 return (send_request(fd, (char *)&req, sizeof(req), "bind", ebuf));
1581 }
1582
1583 static int
1584 dlbindack(int fd, char *bufp, char *ebuf, int *uerror)
1585 {
1586
1587 return (recv_ack(fd, DL_BIND_ACK_SIZE, "bind", bufp, ebuf, uerror));
1588 }
1589
1590 static int
1591 dlokack(int fd, const char *what, char *bufp, char *ebuf, int *uerror)
1592 {
1593
1594 return (recv_ack(fd, DL_OK_ACK_SIZE, what, bufp, ebuf, uerror));
1595 }
1596
1597
1598 static int
1599 dlinforeq(int fd, char *ebuf)
1600 {
1601 dl_info_req_t req;
1602
1603 req.dl_primitive = DL_INFO_REQ;
1604
1605 return (send_request(fd, (char *)&req, sizeof(req), "info", ebuf));
1606 }
1607
1608 static int
1609 dlinfoack(int fd, char *bufp, char *ebuf)
1610 {
1611
1612 return (recv_ack(fd, DL_INFO_ACK_SIZE, "info", bufp, ebuf, NULL));
1613 }
1614
1615 #ifdef HAVE_DL_PASSIVE_REQ_T
1616 /*
1617 * Enable DLPI passive mode. We do not care if this request fails, as this
1618 * indicates the underlying DLPI device does not support link aggregation.
1619 */
1620 static void
1621 dlpassive(int fd, char *ebuf)
1622 {
1623 dl_passive_req_t req;
1624 bpf_u_int32 buf[MAXDLBUF];
1625
1626 req.dl_primitive = DL_PASSIVE_REQ;
1627
1628 if (send_request(fd, (char *)&req, sizeof(req), "dlpassive", ebuf) == 0)
1629 (void) dlokack(fd, "dlpassive", (char *)buf, ebuf, NULL);
1630 }
1631 #endif
1632
1633 #ifdef DL_HP_RAWDLS
1634 /*
1635 * There's an ack *if* there's an error.
1636 */
1637 static int
1638 dlrawdatareq(int fd, const u_char *datap, int datalen)
1639 {
1640 struct strbuf ctl, data;
1641 long buf[MAXDLBUF]; /* XXX - char? */
1642 union DL_primitives *dlp;
1643 int dlen;
1644
1645 dlp = MAKE_DL_PRIMITIVES(buf);
1646
1647 dlp->dl_primitive = DL_HP_RAWDATA_REQ;
1648 dlen = DL_HP_RAWDATA_REQ_SIZE;
1649
1650 /*
1651 * HP's documentation doesn't appear to show us supplying any
1652 * address pointed to by the control part of the message.
1653 * I think that's what raw mode means - you just send the raw
1654 * packet, you don't specify where to send it to, as that's
1655 * implied by the destination address.
1656 */
1657 ctl.maxlen = 0;
1658 ctl.len = dlen;
1659 ctl.buf = (void *)buf;
1660
1661 data.maxlen = 0;
1662 data.len = datalen;
1663 data.buf = (void *)datap;
1664
1665 return (putmsg(fd, &ctl, &data, 0));
1666 }
1667 #endif /* DL_HP_RAWDLS */
1668
1669 #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
1670 static void
1671 get_release(char *buf, size_t bufsize, bpf_u_int32 *majorp,
1672 bpf_u_int32 *minorp, bpf_u_int32 *microp)
1673 {
1674 char *cp;
1675
1676 *majorp = 0;
1677 *minorp = 0;
1678 *microp = 0;
1679 if (sysinfo(SI_RELEASE, buf, bufsize) < 0) {
1680 pcapint_strlcpy(buf, "?", bufsize);
1681 return;
1682 }
1683 cp = buf;
1684 if (!PCAP_ISDIGIT((unsigned char)*cp))
1685 return;
1686 *majorp = strtol(cp, &cp, 10);
1687 if (*cp++ != '.')
1688 return;
1689 *minorp = strtol(cp, &cp, 10);
1690 if (*cp++ != '.')
1691 return;
1692 *microp = strtol(cp, &cp, 10);
1693 }
1694 #endif
1695
1696 #ifdef DL_HP_PPA_REQ
1697 /*
1698 * Under HP-UX 10 and HP-UX 11, we can ask for the ppa
1699 */
1700
1701
1702 /*
1703 * Determine ppa number that specifies ifname.
1704 *
1705 * If the "dl_hp_ppa_info_t" doesn't have a "dl_module_id_1" member,
1706 * the code that's used here is the old code for HP-UX 10.x.
1707 *
1708 * However, HP-UX 10.20, at least, appears to have such a member
1709 * in its "dl_hp_ppa_info_t" structure, so the new code is used.
1710 * The new code didn't work on an old 10.20 system on which Rick
1711 * Jones of HP tried it, but with later patches installed, it
1712 * worked - it appears that the older system had those members but
1713 * didn't put anything in them, so, if the search by name fails, we
1714 * do the old search.
1715 *
1716 * Rick suggests that making sure your system is "up on the latest
1717 * lancommon/DLPI/driver patches" is probably a good idea; it'd fix
1718 * that problem, as well as allowing libpcap to see packets sent
1719 * from the system on which the libpcap application is being run.
1720 * (On 10.20, in addition to getting the latest patches, you need
1721 * to turn the kernel "lanc_outbound_promisc_flag" flag on with ADB;
1722 * a posting to "comp.sys.hp.hpux" at
1723 *
1724 * http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=558092266
1725 *
1726 * says that, to see the machine's outgoing traffic, you'd need to
1727 * apply the right patches to your system, and also set that variable
1728 * with:
1729
1730 echo 'lanc_outbound_promisc_flag/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem
1731
1732 * which could be put in, for example, "/sbin/init.d/lan".
1733 *
1734 * Setting the variable is not necessary on HP-UX 11.x.
1735 */
1736 static int
1737 get_dlpi_ppa(register int fd, register const char *device, register u_int unit,
1738 u_int *ppa, register char *ebuf)
1739 {
1740 register dl_hp_ppa_ack_t *ap;
1741 register dl_hp_ppa_info_t *ipstart, *ip;
1742 register u_int i;
1743 char dname[100];
1744 register u_long majdev;
1745 struct stat statbuf;
1746 dl_hp_ppa_req_t req;
1747 char buf[MAXDLBUF];
1748 char *ppa_data_buf;
1749 dl_hp_ppa_ack_t *dlp;
1750 struct strbuf ctl;
1751 int flags;
1752
1753 memset((char *)&req, 0, sizeof(req));
1754 req.dl_primitive = DL_HP_PPA_REQ;
1755
1756 memset((char *)buf, 0, sizeof(buf));
1757 if (send_request(fd, (char *)&req, sizeof(req), "hpppa", ebuf) < 0)
1758 return (PCAP_ERROR);
1759
1760 ctl.maxlen = DL_HP_PPA_ACK_SIZE;
1761 ctl.len = 0;
1762 ctl.buf = (char *)buf;
1763
1764 flags = 0;
1765 /*
1766 * DLPI may return a big chunk of data for a DL_HP_PPA_REQ. The normal
1767 * recv_ack will fail because it set the maxlen to MAXDLBUF (8192)
1768 * which is NOT big enough for a DL_HP_PPA_REQ.
1769 *
1770 * This causes libpcap applications to fail on a system with HP-APA
1771 * installed.
1772 *
1773 * To figure out how big the returned data is, we first call getmsg
1774 * to get the small head and peek at the head to get the actual data
1775 * length, and then issue another getmsg to get the actual PPA data.
1776 */
1777 /* get the head first */
1778 if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
1779 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1780 errno, "get_dlpi_ppa: hpppa getmsg");
1781 return (PCAP_ERROR);
1782 }
1783 if (ctl.len == -1) {
1784 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1785 "get_dlpi_ppa: hpppa getmsg: control buffer has no data");
1786 return (PCAP_ERROR);
1787 }
1788
1789 dlp = (dl_hp_ppa_ack_t *)ctl.buf;
1790 if (dlp->dl_primitive != DL_HP_PPA_ACK) {
1791 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1792 "get_dlpi_ppa: hpppa unexpected primitive ack 0x%x",
1793 (bpf_u_int32)dlp->dl_primitive);
1794 return (PCAP_ERROR);
1795 }
1796
1797 if ((size_t)ctl.len < DL_HP_PPA_ACK_SIZE) {
1798 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1799 "get_dlpi_ppa: hpppa ack too small (%d < %lu)",
1800 ctl.len, (unsigned long)DL_HP_PPA_ACK_SIZE);
1801 return (PCAP_ERROR);
1802 }
1803
1804 /* allocate buffer */
1805 if ((ppa_data_buf = (char *)malloc(dlp->dl_length)) == NULL) {
1806 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1807 errno, "get_dlpi_ppa: hpppa malloc");
1808 return (PCAP_ERROR);
1809 }
1810 ctl.maxlen = dlp->dl_length;
1811 ctl.len = 0;
1812 ctl.buf = (char *)ppa_data_buf;
1813 /* get the data */
1814 if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
1815 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1816 errno, "get_dlpi_ppa: hpppa getmsg");
1817 free(ppa_data_buf);
1818 return (PCAP_ERROR);
1819 }
1820 if (ctl.len == -1) {
1821 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1822 "get_dlpi_ppa: hpppa getmsg: control buffer has no data");
1823 return (PCAP_ERROR);
1824 }
1825 if ((u_int)ctl.len < dlp->dl_length) {
1826 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1827 "get_dlpi_ppa: hpppa ack too small (%d < %lu)",
1828 ctl.len, (unsigned long)dlp->dl_length);
1829 free(ppa_data_buf);
1830 return (PCAP_ERROR);
1831 }
1832
1833 ap = (dl_hp_ppa_ack_t *)buf;
1834 ipstart = (dl_hp_ppa_info_t *)ppa_data_buf;
1835 ip = ipstart;
1836
1837 #ifdef HAVE_DL_HP_PPA_INFO_T_DL_MODULE_ID_1
1838 /*
1839 * The "dl_hp_ppa_info_t" structure has a "dl_module_id_1"
1840 * member that should, in theory, contain the part of the
1841 * name for the device that comes before the unit number,
1842 * and should also have a "dl_module_id_2" member that may
1843 * contain an alternate name (e.g., I think Ethernet devices
1844 * have both "lan", for "lanN", and "snap", for "snapN", with
1845 * the former being for Ethernet packets and the latter being
1846 * for 802.3/802.2 packets).
1847 *
1848 * Search for the device that has the specified name and
1849 * instance number.
1850 */
1851 for (i = 0; i < ap->dl_count; i++) {
1852 if ((strcmp((const char *)ip->dl_module_id_1, device) == 0 ||
1853 strcmp((const char *)ip->dl_module_id_2, device) == 0) &&
1854 ip->dl_instance_num == unit)
1855 break;
1856
1857 ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
1858 }
1859 #else
1860 /*
1861 * We don't have that member, so the search is impossible; make it
1862 * look as if the search failed.
1863 */
1864 i = ap->dl_count;
1865 #endif
1866
1867 if (i == ap->dl_count) {
1868 /*
1869 * Well, we didn't, or can't, find the device by name.
1870 *
1871 * HP-UX 10.20, whilst it has "dl_module_id_1" and
1872 * "dl_module_id_2" fields in the "dl_hp_ppa_info_t",
1873 * doesn't seem to fill them in unless the system is
1874 * at a reasonably up-to-date patch level.
1875 *
1876 * Older HP-UX 10.x systems might not have those fields
1877 * at all.
1878 *
1879 * Therefore, we'll search for the entry with the major
1880 * device number of a device with the name "/dev/<dev><unit>",
1881 * if such a device exists, as the old code did.
1882 */
1883 snprintf(dname, sizeof(dname), "/dev/%s%u", device, unit);
1884 if (stat(dname, &statbuf) < 0) {
1885 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1886 errno, "stat: %s", dname);
1887 return (PCAP_ERROR);
1888 }
1889 majdev = major(statbuf.st_rdev);
1890
1891 ip = ipstart;
1892
1893 for (i = 0; i < ap->dl_count; i++) {
1894 if (ip->dl_mjr_num == majdev &&
1895 ip->dl_instance_num == unit)
1896 break;
1897
1898 ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
1899 }
1900 }
1901 if (i == ap->dl_count) {
1902 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1903 "can't find /dev/dlpi PPA for %s%u", device, unit);
1904 return (PCAP_ERROR_NO_SUCH_DEVICE);
1905 }
1906 if (ip->dl_hdw_state == HDW_DEAD) {
1907 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1908 "%s%d: hardware state: DOWN\n", device, unit);
1909 free(ppa_data_buf);
1910 return (PCAP_ERROR);
1911 }
1912 *ppa = ip->dl_ppa;
1913 free(ppa_data_buf);
1914 return (0);
1915 }
1916 #endif
1917
1918 #ifdef HAVE_HPUX9
1919 /*
1920 * Under HP-UX 9, there is no good way to determine the ppa.
1921 * So punt and read it from /dev/kmem.
1922 */
1923 static struct nlist nl[] = {
1924 #define NL_IFNET 0
1925 { "ifnet" },
1926 { "" }
1927 };
1928
1929 static char path_vmunix[] = "/hp-ux";
1930
1931 /* Determine ppa number that specifies ifname */
1932 static int
1933 get_dlpi_ppa(register int fd, register const char *ifname, register u_int unit,
1934 u_int *ppa, register char *ebuf)
1935 {
1936 register const char *cp;
1937 register int kd;
1938 void *addr;
1939 struct ifnet ifnet;
1940 char if_name[sizeof(ifnet.if_name) + 1];
1941
1942 cp = strrchr(ifname, '/');
1943 if (cp != NULL)
1944 ifname = cp + 1;
1945 if (nlist(path_vmunix, &nl) < 0) {
1946 snprintf(ebuf, PCAP_ERRBUF_SIZE, "nlist %s failed",
1947 path_vmunix);
1948 return (PCAP_ERROR);
1949 }
1950 if (nl[NL_IFNET].n_value == 0) {
1951 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1952 "couldn't find %s kernel symbol",
1953 nl[NL_IFNET].n_name);
1954 return (PCAP_ERROR);
1955 }
1956 kd = open("/dev/kmem", O_RDONLY);
1957 if (kd < 0) {
1958 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1959 errno, "kmem open");
1960 return (PCAP_ERROR);
1961 }
1962 if (dlpi_kread(kd, nl[NL_IFNET].n_value,
1963 &addr, sizeof(addr), ebuf) < 0) {
1964 close(kd);
1965 return (PCAP_ERROR);
1966 }
1967 for (; addr != NULL; addr = ifnet.if_next) {
1968 if (dlpi_kread(kd, (off_t)addr,
1969 &ifnet, sizeof(ifnet), ebuf) < 0 ||
1970 dlpi_kread(kd, (off_t)ifnet.if_name,
1971 if_name, sizeof(ifnet.if_name), ebuf) < 0) {
1972 (void)close(kd);
1973 return (PCAP_ERROR);
1974 }
1975 if_name[sizeof(ifnet.if_name)] = '\0';
1976 if (strcmp(if_name, ifname) == 0 && ifnet.if_unit == unit) {
1977 *ppa = ifnet.if_index;
1978 return (0);
1979 }
1980 }
1981
1982 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't find %s", ifname);
1983 return (PCAP_ERROR_NO_SUCH_DEVICE);
1984 }
1985
1986 static int
1987 dlpi_kread(register int fd, register off_t addr,
1988 register void *buf, register u_int len, register char *ebuf)
1989 {
1990 register int cc;
1991
1992 if (lseek(fd, addr, SEEK_SET) < 0) {
1993 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1994 errno, "lseek");
1995 return (-1);
1996 }
1997 cc = read(fd, buf, len);
1998 if (cc < 0) {
1999 pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
2000 errno, "read");
2001 return (-1);
2002 } else if (cc != len) {
2003 snprintf(ebuf, PCAP_ERRBUF_SIZE, "short read (%d != %d)", cc,
2004 len);
2005 return (-1);
2006 }
2007 return (cc);
2008 }
2009 #endif
2010
2011 pcap_t *
2012 pcapint_create_interface(const char *device _U_, char *ebuf)
2013 {
2014 pcap_t *p;
2015 #ifdef DL_HP_RAWDLS
2016 struct pcap_dlpi *pd;
2017 #endif
2018
2019 p = PCAP_CREATE_COMMON(ebuf, struct pcap_dlpi);
2020 if (p == NULL)
2021 return (NULL);
2022
2023 #ifdef DL_HP_RAWDLS
2024 pd = p->priv;
2025 pd->send_fd = -1; /* it hasn't been opened yet */
2026 #endif
2027
2028 p->activate_op = pcap_activate_dlpi;
2029 return (p);
2030 }
2031
2032 /*
2033 * Libpcap version string.
2034 */
2035 const char *
2036 pcap_lib_version(void)
2037 {
2038 return (PCAP_VERSION_STRING);
2039 }
2040