1 /*
2 * Copyright (C) 1997-2003 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * $Id: ip_log.c,v 2.75.2.7 2005/06/11 07:47:44 darrenr Exp $
7 *
8 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
9 * Use is subject to license terms.
10 */
11
12 #include <sys/param.h>
13 #if defined(KERNEL) || defined(_KERNEL)
14 # undef KERNEL
15 # undef _KERNEL
16 # define KERNEL 1
17 # define _KERNEL 1
18 #endif
19 #if defined(__NetBSD__) && (NetBSD >= 199905) && !defined(IPFILTER_LKM) && \
20 defined(_KERNEL)
21 # include "opt_ipfilter_log.h"
22 #endif
23 #if defined(__FreeBSD__) && !defined(IPFILTER_LKM)
24 # if defined(_KERNEL)
25 # if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)
26 # include "opt_ipfilter.h"
27 # endif
28 # else
29 # include <osreldate.h>
30 # endif
31 #endif
32 #ifndef SOLARIS
33 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
34 #endif
35 #include <sys/errno.h>
36 #include <sys/types.h>
37 #include <sys/file.h>
38 #ifndef _KERNEL
39 # include <stdio.h>
40 # include <string.h>
41 # include <stdlib.h>
42 # include <ctype.h>
43 # define _KERNEL
44 # define KERNEL
45 # ifdef __OpenBSD__
46 struct file;
47 # endif
48 # include <sys/uio.h>
49 # undef _KERNEL
50 # undef KERNEL
51 #endif
52 #if __FreeBSD_version >= 220000 && defined(_KERNEL)
53 # include <sys/fcntl.h>
54 # include <sys/filio.h>
55 #else
56 # include <sys/ioctl.h>
57 #endif
58 #include <sys/time.h>
59 #if defined(_KERNEL)
60 # include <sys/systm.h>
61 # if defined(NetBSD) && (__NetBSD_Version__ >= 104000000)
62 # include <sys/proc.h>
63 # endif
64 #endif /* _KERNEL */
65 #if !SOLARIS && !defined(__hpux) && !defined(linux)
66 # if (NetBSD > 199609) || (OpenBSD > 199603) || (__FreeBSD_version >= 300000)
67 # include <sys/dirent.h>
68 # else
69 # include <sys/dir.h>
70 # endif
71 # include <sys/mbuf.h>
72 #else
73 # if !defined(__hpux) && defined(_KERNEL)
74 # include <sys/filio.h>
75 # include <sys/cred.h>
76 # include <sys/ddi.h>
77 # include <sys/sunddi.h>
78 # include <sys/ksynch.h>
79 # include <sys/kmem.h>
80 # include <sys/mkdev.h>
81 # include <sys/dditypes.h>
82 # include <sys/cmn_err.h>
83 # endif /* !__hpux */
84 #endif /* !SOLARIS && !__hpux */
85 #if !defined(linux)
86 # include <sys/protosw.h>
87 #endif
88 #include <sys/socket.h>
89
90 #include <net/if.h>
91 #ifdef sun
92 # include <net/af.h>
93 #endif
94 #if __FreeBSD_version >= 300000
95 # include <net/if_var.h>
96 #endif
97 #include <net/route.h>
98 #include <netinet/in.h>
99 #ifdef __sgi
100 # include <sys/ddi.h>
101 # ifdef IFF_DRVRLOCK /* IRIX6 */
102 # include <sys/hashing.h>
103 # endif
104 #endif
105 #if !defined(__hpux) && !defined(linux) && \
106 !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/
107 # include <netinet/in_var.h>
108 #endif
109 #include <netinet/in_systm.h>
110 #include <netinet/ip.h>
111 #include <netinet/tcp.h>
112 #include <netinet/udp.h>
113 #include <netinet/ip_icmp.h>
114 #ifdef USE_INET6
115 # include <netinet/icmp6.h>
116 #endif
117 #if !defined(linux)
118 # include <netinet/ip_var.h>
119 #endif
120 #ifndef _KERNEL
121 # include <syslog.h>
122 #endif
123 #include "netinet/ip_compat.h"
124 #include <netinet/tcpip.h>
125 #include "netinet/ip_fil.h"
126 #include "netinet/ip_nat.h"
127 #include "netinet/ip_frag.h"
128 #include "netinet/ip_state.h"
129 #include "netinet/ip_auth.h"
130 #include "netinet/ipf_stack.h"
131 #if (__FreeBSD_version >= 300000) || defined(__NetBSD__)
132 # include <sys/malloc.h>
133 #endif
134 /* END OF INCLUDES */
135
136 #ifdef IPFILTER_LOG
137
138 # if defined(IPL_SELECT)
139 # include <machine/sys/user.h>
140 # include <sys/kthread_iface.h>
141 # define READ_COLLISION 0x001
142
143 iplog_select_t iplog_ss[IPL_LOGMAX+1];
144
145 extern int selwait;
146 # endif /* IPL_SELECT */
147
148 /* ipl_magic never changes */
149 int ipl_magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE,
150 IPL_MAGIC, IPL_MAGIC, IPL_MAGIC,
151 IPL_MAGIC, IPL_MAGIC };
152
153 /* ------------------------------------------------------------------------ */
154 /* Function: fr_loginit */
155 /* Returns: int - 0 == success (always returned) */
156 /* Parameters: Nil */
157 /* */
158 /* Initialise log buffers & pointers. Also iniialised the CRC to a local */
159 /* secret for use in calculating the "last log checksum". */
160 /* ------------------------------------------------------------------------ */
fr_loginit(ifs)161 int fr_loginit(ifs)
162 ipf_stack_t *ifs;
163 {
164 int i;
165
166 for (i = IPL_LOGMAX; i >= 0; i--) {
167 ifs->ifs_iplt[i] = NULL;
168 ifs->ifs_ipll[i] = NULL;
169 ifs->ifs_iplh[i] = &ifs->ifs_iplt[i];
170 ifs->ifs_iplused[i] = 0;
171 bzero((char *)&ifs->ifs_iplcrc[i], sizeof(ifs->ifs_iplcrc[i]));
172 # ifdef IPL_SELECT
173 iplog_ss[i].read_waiter = 0;
174 iplog_ss[i].state = 0;
175 # endif
176 # if defined(linux) && defined(_KERNEL)
177 init_waitqueue_head(iplh_linux + i);
178 # endif
179 }
180
181 # if SOLARIS && defined(_KERNEL)
182 cv_init(&ifs->ifs_iplwait, "ipl condvar", CV_DRIVER, NULL);
183 # endif
184 MUTEX_INIT(&ifs->ifs_ipl_mutex, "ipf log mutex");
185
186 ifs->ifs_ipl_log_init = 1;
187
188 return 0;
189 }
190
191
192 /* ------------------------------------------------------------------------ */
193 /* Function: fr_logunload */
194 /* Returns: Nil */
195 /* Parameters: Nil */
196 /* */
197 /* Clean up any log data that has accumulated without being read. */
198 /* ------------------------------------------------------------------------ */
fr_logunload(ifs)199 void fr_logunload(ifs)
200 ipf_stack_t *ifs;
201 {
202 int i;
203
204 if (ifs->ifs_ipl_log_init == 0)
205 return;
206
207 for (i = IPL_LOGMAX; i >= 0; i--)
208 (void) ipflog_clear(i, ifs);
209
210 # if SOLARIS && defined(_KERNEL)
211 cv_destroy(&ifs->ifs_iplwait);
212 # endif
213 MUTEX_DESTROY(&ifs->ifs_ipl_mutex);
214
215 ifs->ifs_ipl_log_init = 0;
216 }
217
218
219 /* ------------------------------------------------------------------------ */
220 /* Function: ipflog */
221 /* Returns: int - 0 == success, -1 == failure */
222 /* Parameters: fin(I) - pointer to packet information */
223 /* flags(I) - flags from filter rules */
224 /* */
225 /* Create a log record for a packet given that it has been triggered by a */
226 /* rule (or the default setting). Calculate the transport protocol header */
227 /* size using predetermined size of a couple of popular protocols and thus */
228 /* how much data to copy into the log, including part of the data body if */
229 /* requested. */
230 /* ------------------------------------------------------------------------ */
ipflog(fin,flags)231 int ipflog(fin, flags)
232 fr_info_t *fin;
233 u_int flags;
234 {
235 register size_t hlen;
236 int types[2], mlen;
237 size_t sizes[2];
238 void *ptrs[2];
239 ipflog_t ipfl;
240 u_char p;
241 mb_t *m;
242 # if SOLARIS && defined(_KERNEL)
243 net_handle_t nif;
244 void *ifp;
245 # else
246 # if defined(__hpux) && defined(_KERNEL)
247 qif_t *ifp;
248 # else
249 struct ifnet *ifp;
250 # endif
251 # endif /* SOLARIS */
252 ipf_stack_t *ifs = fin->fin_ifs;
253
254 ipfl.fl_nattag.ipt_num[0] = 0;
255 m = fin->fin_m;
256 ifp = fin->fin_ifp;
257 hlen = fin->fin_hlen;
258 /*
259 * calculate header size.
260 */
261 if (fin->fin_off == 0) {
262 p = fin->fin_fi.fi_p;
263 if (p == IPPROTO_TCP)
264 hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
265 else if (p == IPPROTO_UDP)
266 hlen += MIN(sizeof(udphdr_t), fin->fin_dlen);
267 else if (p == IPPROTO_ICMP) {
268 struct icmp *icmp;
269
270 icmp = (struct icmp *)fin->fin_dp;
271
272 /*
273 * For ICMP, if the packet is an error packet, also
274 * include the information about the packet which
275 * caused the error.
276 */
277 switch (icmp->icmp_type)
278 {
279 case ICMP_UNREACH :
280 case ICMP_SOURCEQUENCH :
281 case ICMP_REDIRECT :
282 case ICMP_TIMXCEED :
283 case ICMP_PARAMPROB :
284 hlen += MIN(sizeof(struct icmp) + 8,
285 fin->fin_dlen);
286 break;
287 default :
288 hlen += MIN(sizeof(struct icmp),
289 fin->fin_dlen);
290 break;
291 }
292 }
293 # ifdef USE_INET6
294 else if (p == IPPROTO_ICMPV6) {
295 struct icmp6_hdr *icmp;
296
297 icmp = (struct icmp6_hdr *)fin->fin_dp;
298
299 /*
300 * For ICMPV6, if the packet is an error packet, also
301 * include the information about the packet which
302 * caused the error.
303 */
304 if (icmp->icmp6_type < 128) {
305 hlen += MIN(sizeof(struct icmp6_hdr) + 8,
306 fin->fin_dlen);
307 } else {
308 hlen += MIN(sizeof(struct icmp6_hdr),
309 fin->fin_dlen);
310 }
311 }
312 # endif
313 }
314 /*
315 * Get the interface number and name to which this packet is
316 * currently associated.
317 */
318 # if SOLARIS && defined(_KERNEL)
319 ipfl.fl_unit = (u_int)0;
320 nif = NULL;
321 if (fin->fin_fi.fi_v == 4)
322 nif = ifs->ifs_ipf_ipv4;
323 else if (fin->fin_fi.fi_v == 6)
324 nif = ifs->ifs_ipf_ipv6;
325 if (nif != NULL) {
326 if (net_getifname(nif, (phy_if_t)ifp,
327 ipfl.fl_ifname, sizeof(ipfl.fl_ifname)) != 0)
328 return (-1);
329 }
330
331 # else
332 # if defined(__hpux) && defined(_KERNEL)
333 ipfl.fl_unit = (u_int)0;
334 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname));
335 # else
336 # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
337 (defined(OpenBSD) && (OpenBSD >= 199603)) || defined(linux) || \
338 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113))
339 COPYIFNAME(ifp, ipfl.fl_ifname);
340 # else
341 ipfl.fl_unit = (u_int)ifp->if_unit;
342 # if defined(_KERNEL)
343 if ((ipfl.fl_ifname[0] = ifp->if_name[0]))
344 if ((ipfl.fl_ifname[1] = ifp->if_name[1]))
345 if ((ipfl.fl_ifname[2] = ifp->if_name[2]))
346 ipfl.fl_ifname[3] = ifp->if_name[3];
347 # else
348 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname));
349 ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0';
350 # endif
351 # endif
352 # endif /* __hpux */
353 # endif /* SOLARIS */
354 mlen = fin->fin_plen - hlen;
355 if (!ifs->ifs_ipl_logall) {
356 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0;
357 } else if ((flags & FR_LOGBODY) == 0) {
358 mlen = 0;
359 }
360 if (mlen < 0)
361 mlen = 0;
362 ipfl.fl_plen = (u_char)mlen;
363 ipfl.fl_hlen = (u_char)hlen;
364 ipfl.fl_rule = fin->fin_rule;
365 (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN);
366 if (fin->fin_fr != NULL) {
367 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel;
368 ipfl.fl_logtag = fin->fin_fr->fr_logtag;
369 } else {
370 ipfl.fl_loglevel = 0xffff;
371 ipfl.fl_logtag = FR_NOLOGTAG;
372 }
373 if (fin->fin_nattag != NULL)
374 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag,
375 sizeof(ipfl.fl_nattag));
376 ipfl.fl_flags = flags;
377 ipfl.fl_dir = fin->fin_out;
378 ipfl.fl_lflags = fin->fin_flx;
379 ptrs[0] = (void *)&ipfl;
380 sizes[0] = sizeof(ipfl);
381 types[0] = 0;
382 # if defined(MENTAT) && defined(_KERNEL)
383 /*
384 * Are we copied from the mblk or an aligned array ?
385 */
386 if (fin->fin_ip == (ip_t *)m->b_rptr) {
387 ptrs[1] = m;
388 sizes[1] = hlen + mlen;
389 types[1] = 1;
390 } else {
391 ptrs[1] = fin->fin_ip;
392 sizes[1] = hlen + mlen;
393 types[1] = 0;
394 }
395 # else
396 ptrs[1] = m;
397 sizes[1] = hlen + mlen;
398 types[1] = 1;
399 # endif /* MENTAT */
400 return ipllog(IPL_LOGIPF, fin, ptrs, sizes, types, 2, fin->fin_ifs);
401 }
402
403
404 /* ------------------------------------------------------------------------ */
405 /* Function: ipllog */
406 /* Returns: int - 0 == success, -1 == failure */
407 /* Parameters: dev(I) - device that owns this log record */
408 /* fin(I) - pointer to packet information */
409 /* items(I) - array of pointers to log data */
410 /* itemsz(I) - array of size of valid memory pointed to */
411 /* types(I) - type of data pointed to by items pointers */
412 /* cnt(I) - number of elements in arrays items/itemsz/types */
413 /* */
414 /* Takes an array of parameters and constructs one record to include the */
415 /* miscellaneous packet information, as well as packet data, for reading */
416 /* from the log device. */
417 /* ------------------------------------------------------------------------ */
ipllog(dev,fin,items,itemsz,types,cnt,ifs)418 int ipllog(dev, fin, items, itemsz, types, cnt, ifs)
419 int dev;
420 fr_info_t *fin;
421 void **items;
422 size_t *itemsz;
423 int *types, cnt;
424 ipf_stack_t *ifs;
425 {
426 caddr_t buf, ptr;
427 iplog_t *ipl;
428 size_t len;
429 int i;
430 SPL_INT(s);
431
432 /*
433 * Check to see if this log record has a CRC which matches the last
434 * record logged. If it does, just up the count on the previous one
435 * rather than create a new one.
436 */
437 if (ifs->ifs_ipl_suppress) {
438 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
439 if ((fin != NULL) && (fin->fin_off == 0)) {
440 if ((ifs->ifs_ipll[dev] != NULL) &&
441 bcmp((char *)fin, (char *)&ifs->ifs_iplcrc[dev],
442 FI_LCSIZE) == 0) {
443 ifs->ifs_ipll[dev]->ipl_count++;
444 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
445 return 0;
446 }
447 bcopy((char *)fin, (char *)&ifs->ifs_iplcrc[dev],
448 FI_LCSIZE);
449 } else
450 bzero((char *)&ifs->ifs_iplcrc[dev], FI_CSIZE);
451 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
452 }
453
454 /*
455 * Get the total amount of data to be logged.
456 */
457 for (i = 0, len = sizeof(iplog_t); i < cnt; i++)
458 len += itemsz[i];
459
460 /*
461 * check that we have space to record this information and can
462 * allocate that much.
463 */
464 KMALLOCS(buf, caddr_t, len);
465 if (buf == NULL)
466 return -1;
467 SPL_NET(s);
468 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
469 if ((ifs->ifs_iplused[dev] + len) > IPFILTER_LOGSIZE) {
470 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
471 SPL_X(s);
472 KFREES(buf, len);
473 return -1;
474 }
475 ifs->ifs_iplused[dev] += len;
476 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
477 SPL_X(s);
478
479 /*
480 * advance the log pointer to the next empty record and deduct the
481 * amount of space we're going to use.
482 */
483 ipl = (iplog_t *)buf;
484 ipl->ipl_magic = ipl_magic[dev];
485 ipl->ipl_count = 1;
486 ipl->ipl_next = NULL;
487 ipl->ipl_dsize = len;
488 #ifdef _KERNEL
489 GETKTIME(&ipl->ipl_sec);
490 #else
491 ipl->ipl_sec = 0;
492 ipl->ipl_usec = 0;
493 #endif
494
495 /*
496 * Loop through all the items to be logged, copying each one to the
497 * buffer. Use bcopy for normal data or the mb_t copyout routine.
498 */
499 for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) {
500 if (types[i] == 0) {
501 bcopy(items[i], ptr, itemsz[i]);
502 } else if (types[i] == 1) {
503 COPYDATA(items[i], 0, itemsz[i], ptr);
504 }
505 ptr += itemsz[i];
506 }
507 SPL_NET(s);
508 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
509 ifs->ifs_ipll[dev] = ipl;
510 *ifs->ifs_iplh[dev] = ipl;
511 ifs->ifs_iplh[dev] = &ipl->ipl_next;
512
513 /*
514 * Now that the log record has been completed and added to the queue,
515 * wake up any listeners who may want to read it.
516 */
517 # if SOLARIS && defined(_KERNEL)
518 cv_signal(&ifs->ifs_iplwait);
519 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
520 # else
521 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
522 WAKEUP(&ifs->ifs_iplh, dev);
523 # endif
524 SPL_X(s);
525 # ifdef IPL_SELECT
526 iplog_input_ready(dev);
527 # endif
528 return 0;
529 }
530
531
532 /* ------------------------------------------------------------------------ */
533 /* Function: ipflog_read */
534 /* Returns: int - 0 == success, else error value. */
535 /* Parameters: unit(I) - device we are reading from */
536 /* uio(O) - pointer to information about where to store data */
537 /* */
538 /* Called to handle a read on an IPFilter device. Returns only complete */
539 /* log messages - will not partially copy a log record out to userland. */
540 /* */
541 /* NOTE: This function will block and wait for a signal to return data if */
542 /* there is none present. Asynchronous I/O is not implemented. */
543 /* ------------------------------------------------------------------------ */
ipflog_read(unit,uio,ifs)544 int ipflog_read(unit, uio, ifs)
545 minor_t unit;
546 struct uio *uio;
547 ipf_stack_t *ifs;
548 {
549 size_t dlen, copied;
550 int error = 0;
551 iplog_t *ipl;
552 SPL_INT(s);
553
554 /*
555 * Sanity checks. Make sure the minor # is valid and we're copying
556 * a valid chunk of data.
557 */
558 if (IPL_LOGMAX < unit)
559 return ENXIO;
560 if (uio->uio_resid == 0)
561 return 0;
562 if ((uio->uio_resid < sizeof(iplog_t)) ||
563 (uio->uio_resid > ifs->ifs_ipl_logsize))
564 return EINVAL;
565
566 /*
567 * Lock the log so we can snapshot the variables. Wait for a signal
568 * if the log is empty.
569 */
570 SPL_NET(s);
571 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
572
573 while (ifs->ifs_iplt[unit] == NULL) {
574 # if SOLARIS && defined(_KERNEL)
575 if (!cv_wait_sig(&ifs->ifs_iplwait, &ifs->ifs_ipl_mutex.ipf_lk)) {
576 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
577 return EINTR;
578 }
579 # else
580 # if defined(__hpux) && defined(_KERNEL)
581 lock_t *l;
582
583 # ifdef IPL_SELECT
584 if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) {
585 /* this is no blocking system call */
586 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
587 return 0;
588 }
589 # endif
590
591 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
592 l = get_sleep_lock(&ifs->ifs_iplh[unit]);
593 error = sleep(&ifs->ifs_iplh[unit], PZERO+1);
594 spinunlock(l);
595 # else
596 # if defined(__osf__) && defined(_KERNEL)
597 error = mpsleep(&ifs->ifs_iplh[unit], PSUSP|PCATCH, "iplread", 0,
598 &ifs->ifs_ipl_mutex, MS_LOCK_SIMPLE);
599 # else
600 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
601 SPL_X(s);
602 error = SLEEP(&ifs->ifs_iplh[unit], "ipl sleep");
603 # endif /* __osf__ */
604 # endif /* __hpux */
605 if (error)
606 return error;
607 SPL_NET(s);
608 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
609 # endif /* SOLARIS */
610 }
611
612 # if (BSD >= 199101) || defined(__FreeBSD__) || defined(__osf__)
613 uio->uio_rw = UIO_READ;
614 # endif
615
616 for (copied = 0; ((ipl = ifs->ifs_iplt[unit]) != NULL); copied += dlen) {
617 dlen = ipl->ipl_dsize;
618 if (dlen > uio->uio_resid)
619 break;
620 /*
621 * Don't hold the mutex over the uiomove call.
622 */
623 ifs->ifs_iplt[unit] = ipl->ipl_next;
624 ifs->ifs_iplused[unit] -= dlen;
625 if (ifs->ifs_iplt[unit] == NULL) {
626 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit];
627 ifs->ifs_ipll[unit] = NULL;
628 }
629 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
630 SPL_X(s);
631 error = UIOMOVE((caddr_t)ipl, dlen, UIO_READ, uio);
632 if (error) {
633 SPL_NET(s);
634 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
635 ifs->ifs_iplused[unit] += dlen;
636 ipl->ipl_next = ifs->ifs_iplt[unit];
637 ifs->ifs_iplt[unit] = ipl;
638 ifs->ifs_ipll[unit] = ipl;
639 if (ifs->ifs_iplh[unit] == &ifs->ifs_iplt[unit]) {
640 *ifs->ifs_iplh[unit] = ipl;
641 ifs->ifs_iplh[unit] = &ipl->ipl_next;
642 }
643 break;
644 }
645 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
646 KFREES((caddr_t)ipl, dlen);
647 SPL_NET(s);
648 }
649
650 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
651 SPL_X(s);
652 return error;
653 }
654
655
656 /* ------------------------------------------------------------------------ */
657 /* Function: ipflog_clear */
658 /* Returns: int - number of log bytes cleared. */
659 /* Parameters: unit(I) - device we are reading from */
660 /* */
661 /* Deletes all queued up log records for a given output device. */
662 /* ------------------------------------------------------------------------ */
ipflog_clear(unit,ifs)663 int ipflog_clear(unit, ifs)
664 minor_t unit;
665 ipf_stack_t *ifs;
666 {
667 iplog_t *ipl;
668 int used;
669 SPL_INT(s);
670
671 SPL_NET(s);
672 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
673 while ((ipl = ifs->ifs_iplt[unit]) != NULL) {
674 ifs->ifs_iplt[unit] = ipl->ipl_next;
675 KFREES((caddr_t)ipl, ipl->ipl_dsize);
676 }
677 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit];
678 ifs->ifs_ipll[unit] = NULL;
679 used = ifs->ifs_iplused[unit];
680 ifs->ifs_iplused[unit] = 0;
681 bzero((char *)&ifs->ifs_iplcrc[unit], FI_CSIZE);
682 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
683 SPL_X(s);
684 return used;
685 }
686 #endif /* IPFILTER_LOG */
687