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 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
12 */
13
14 #include <sys/param.h>
15 #if defined(KERNEL) || defined(_KERNEL)
16 # undef KERNEL
17 # undef _KERNEL
18 # define KERNEL 1
19 # define _KERNEL 1
20 #endif
21 #if defined(__NetBSD__) && (NetBSD >= 199905) && !defined(IPFILTER_LKM) && \
22 defined(_KERNEL)
23 # include "opt_ipfilter_log.h"
24 #endif
25 #if defined(__FreeBSD__) && !defined(IPFILTER_LKM)
26 # if defined(_KERNEL)
27 # if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)
28 # include "opt_ipfilter.h"
29 # endif
30 # else
31 # include <osreldate.h>
32 # endif
33 #endif
34 #ifdef SOLARIS
35 #undef SOLARIS
36 #endif
37 #if (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
38 #define SOLARIS (1)
39 #else
40 #define SOLARIS (0)
41 #endif
42 #include <sys/errno.h>
43 #include <sys/types.h>
44 #include <sys/file.h>
45 #ifndef _KERNEL
46 # include <stdio.h>
47 # include <string.h>
48 # include <stdlib.h>
49 # include <ctype.h>
50 # define _KERNEL
51 # define KERNEL
52 # ifdef __OpenBSD__
53 struct file;
54 # endif
55 # include <sys/uio.h>
56 # undef _KERNEL
57 # undef KERNEL
58 #endif
59 #if __FreeBSD_version >= 220000 && defined(_KERNEL)
60 # include <sys/fcntl.h>
61 # include <sys/filio.h>
62 #else
63 # include <sys/ioctl.h>
64 #endif
65 #include <sys/time.h>
66 #if defined(_KERNEL)
67 # include <sys/systm.h>
68 # if defined(NetBSD) && (__NetBSD_Version__ >= 104000000)
69 # include <sys/proc.h>
70 # endif
71 #endif /* _KERNEL */
72 #if !defined(SOLARIS) && !defined(__hpux) && !defined(linux)
73 # if (NetBSD > 199609) || (OpenBSD > 199603) || (__FreeBSD_version >= 300000)
74 # include <sys/dirent.h>
75 # else
76 # include <sys/dir.h>
77 # endif
78 # include <sys/mbuf.h>
79 #else
80 # if !defined(__hpux) && defined(_KERNEL)
81 # include <sys/filio.h>
82 # include <sys/cred.h>
83 # include <sys/ddi.h>
84 # include <sys/sunddi.h>
85 # include <sys/ksynch.h>
86 # include <sys/kmem.h>
87 # include <sys/mkdev.h>
88 # include <sys/dditypes.h>
89 # include <sys/cmn_err.h>
90 # endif /* !__hpux */
91 #endif /* !SOLARIS && !__hpux */
92 #if !defined(linux)
93 # include <sys/protosw.h>
94 #endif
95 #include <sys/socket.h>
96
97 #include <net/if.h>
98 #ifdef sun
99 # include <net/af.h>
100 #endif
101 #if __FreeBSD_version >= 300000
102 # include <net/if_var.h>
103 #endif
104 #include <net/route.h>
105 #include <netinet/in.h>
106 #ifdef __sgi
107 # include <sys/ddi.h>
108 # ifdef IFF_DRVRLOCK /* IRIX6 */
109 # include <sys/hashing.h>
110 # endif
111 #endif
112 #if !defined(__hpux) && !defined(linux) && \
113 !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/
114 # include <netinet/in_var.h>
115 #endif
116 #include <netinet/in_systm.h>
117 #include <netinet/ip.h>
118 #include <netinet/tcp.h>
119 #include <netinet/udp.h>
120 #include <netinet/ip_icmp.h>
121 #ifdef USE_INET6
122 # include <netinet/icmp6.h>
123 #endif
124 #if !defined(linux)
125 # include <netinet/ip_var.h>
126 #endif
127 #ifndef _KERNEL
128 # include <syslog.h>
129 #endif
130 #include "netinet/ip_compat.h"
131 #include <netinet/tcpip.h>
132 #include "netinet/ip_fil.h"
133 #include "netinet/ip_nat.h"
134 #include "netinet/ip_frag.h"
135 #include "netinet/ip_state.h"
136 #include "netinet/ip_auth.h"
137 #include "netinet/ipf_stack.h"
138 #if (__FreeBSD_version >= 300000) || defined(__NetBSD__)
139 # include <sys/malloc.h>
140 #endif
141 /* END OF INCLUDES */
142
143 #ifdef IPFILTER_LOG
144
145 # if defined(IPL_SELECT)
146 # include <machine/sys/user.h>
147 # include <sys/kthread_iface.h>
148 # define READ_COLLISION 0x001
149
150 iplog_select_t iplog_ss[IPL_LOGMAX+1];
151
152 extern int selwait;
153 # endif /* IPL_SELECT */
154
155 /* ipl_magic never changes */
156 int ipl_magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE,
157 IPL_MAGIC, IPL_MAGIC, IPL_MAGIC,
158 IPL_MAGIC, IPL_MAGIC };
159
160 /* ------------------------------------------------------------------------ */
161 /* Function: fr_loginit */
162 /* Returns: int - 0 == success (always returned) */
163 /* Parameters: Nil */
164 /* */
165 /* Initialise log buffers & pointers. Also iniialised the CRC to a local */
166 /* secret for use in calculating the "last log checksum". */
167 /* ------------------------------------------------------------------------ */
fr_loginit(ifs)168 int fr_loginit(ifs)
169 ipf_stack_t *ifs;
170 {
171 int i;
172
173 for (i = IPL_LOGMAX; i >= 0; i--) {
174 ifs->ifs_iplt[i] = NULL;
175 ifs->ifs_ipll[i] = NULL;
176 ifs->ifs_iplh[i] = &ifs->ifs_iplt[i];
177 ifs->ifs_iplused[i] = 0;
178 bzero((char *)&ifs->ifs_iplcrc[i], sizeof(ifs->ifs_iplcrc[i]));
179 # ifdef IPL_SELECT
180 iplog_ss[i].read_waiter = 0;
181 iplog_ss[i].state = 0;
182 # endif
183 # if defined(linux) && defined(_KERNEL)
184 init_waitqueue_head(iplh_linux + i);
185 # endif
186 }
187
188 # if defined(SOLARIS) && defined(_KERNEL)
189 cv_init(&ifs->ifs_iplwait, "ipl condvar", CV_DRIVER, NULL);
190 # endif
191 MUTEX_INIT(&ifs->ifs_ipl_mutex, "ipf log mutex");
192
193 ifs->ifs_ipl_log_init = 1;
194
195 return 0;
196 }
197
198
199 /* ------------------------------------------------------------------------ */
200 /* Function: fr_logunload */
201 /* Returns: Nil */
202 /* Parameters: Nil */
203 /* */
204 /* Clean up any log data that has accumulated without being read. */
205 /* ------------------------------------------------------------------------ */
fr_logunload(ifs)206 void fr_logunload(ifs)
207 ipf_stack_t *ifs;
208 {
209 int i;
210
211 if (ifs->ifs_ipl_log_init == 0)
212 return;
213
214 for (i = IPL_LOGMAX; i >= 0; i--)
215 (void) ipflog_clear(i, ifs);
216
217 # if defined(SOLARIS) && defined(_KERNEL)
218 cv_destroy(&ifs->ifs_iplwait);
219 # endif
220 MUTEX_DESTROY(&ifs->ifs_ipl_mutex);
221
222 ifs->ifs_ipl_log_init = 0;
223 }
224
225
226 /* ------------------------------------------------------------------------ */
227 /* Function: ipflog */
228 /* Returns: int - 0 == success, -1 == failure */
229 /* Parameters: fin(I) - pointer to packet information */
230 /* flags(I) - flags from filter rules */
231 /* */
232 /* Create a log record for a packet given that it has been triggered by a */
233 /* rule (or the default setting). Calculate the transport protocol header */
234 /* size using predetermined size of a couple of popular protocols and thus */
235 /* how much data to copy into the log, including part of the data body if */
236 /* requested. */
237 /* ------------------------------------------------------------------------ */
ipflog(fin,flags)238 int ipflog(fin, flags)
239 fr_info_t *fin;
240 u_int flags;
241 {
242 register size_t hlen;
243 int types[2], mlen;
244 size_t sizes[2];
245 void *ptrs[2];
246 ipflog_t ipfl;
247 u_char p;
248 mb_t *m;
249 # if defined(SOLARIS) && defined(_KERNEL)
250 net_handle_t nif;
251 void *ifp;
252 # else
253 # if defined(__hpux) && defined(_KERNEL)
254 qif_t *ifp;
255 # else
256 struct ifnet *ifp;
257 # endif
258 # endif /* SOLARIS */
259 ipf_stack_t *ifs = fin->fin_ifs;
260
261 ipfl.fl_nattag.ipt_num[0] = 0;
262 m = fin->fin_m;
263 ifp = fin->fin_ifp;
264 hlen = fin->fin_hlen;
265 /*
266 * calculate header size.
267 */
268 if (fin->fin_off == 0) {
269 p = fin->fin_fi.fi_p;
270 if (p == IPPROTO_TCP)
271 hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
272 else if (p == IPPROTO_UDP)
273 hlen += MIN(sizeof(udphdr_t), fin->fin_dlen);
274 else if (p == IPPROTO_ICMP) {
275 struct icmp *icmp;
276
277 icmp = (struct icmp *)fin->fin_dp;
278
279 /*
280 * For ICMP, if the packet is an error packet, also
281 * include the information about the packet which
282 * caused the error.
283 */
284 switch (icmp->icmp_type)
285 {
286 case ICMP_UNREACH :
287 case ICMP_SOURCEQUENCH :
288 case ICMP_REDIRECT :
289 case ICMP_TIMXCEED :
290 case ICMP_PARAMPROB :
291 hlen += MIN(sizeof(struct icmp) + 8,
292 fin->fin_dlen);
293 break;
294 default :
295 hlen += MIN(sizeof(struct icmp),
296 fin->fin_dlen);
297 break;
298 }
299 }
300 # ifdef USE_INET6
301 else if (p == IPPROTO_ICMPV6) {
302 struct icmp6_hdr *icmp;
303
304 icmp = (struct icmp6_hdr *)fin->fin_dp;
305
306 /*
307 * For ICMPV6, if the packet is an error packet, also
308 * include the information about the packet which
309 * caused the error.
310 */
311 if (icmp->icmp6_type < 128) {
312 hlen += MIN(sizeof(struct icmp6_hdr) + 8,
313 fin->fin_dlen);
314 } else {
315 hlen += MIN(sizeof(struct icmp6_hdr),
316 fin->fin_dlen);
317 }
318 }
319 # endif
320 }
321 /*
322 * Get the interface number and name to which this packet is
323 * currently associated.
324 */
325 # if defined(SOLARIS) && defined(_KERNEL)
326 ipfl.fl_unit = (u_int)0;
327 nif = NULL;
328 if (fin->fin_fi.fi_v == 4)
329 nif = ifs->ifs_ipf_ipv4;
330 else if (fin->fin_fi.fi_v == 6)
331 nif = ifs->ifs_ipf_ipv6;
332 if (nif != NULL) {
333 if (net_getifname(nif, (phy_if_t)ifp,
334 ipfl.fl_ifname, sizeof(ipfl.fl_ifname)) != 0)
335 return (-1);
336 }
337
338 # else
339 # if defined(__hpux) && defined(_KERNEL)
340 ipfl.fl_unit = (u_int)0;
341 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname));
342 # else
343 # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
344 (defined(OpenBSD) && (OpenBSD >= 199603)) || defined(linux) || \
345 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113))
346 COPYIFNAME(ifp, ipfl.fl_ifname);
347 # else
348 ipfl.fl_unit = (u_int)ifp->if_unit;
349 # if defined(_KERNEL)
350 if ((ipfl.fl_ifname[0] = ifp->if_name[0]))
351 if ((ipfl.fl_ifname[1] = ifp->if_name[1]))
352 if ((ipfl.fl_ifname[2] = ifp->if_name[2]))
353 ipfl.fl_ifname[3] = ifp->if_name[3];
354 # else
355 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname));
356 ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0';
357 # endif
358 # endif
359 # endif /* __hpux */
360 # endif /* SOLARIS */
361 mlen = fin->fin_plen - hlen;
362 if (!ifs->ifs_ipl_logall) {
363 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0;
364 } else if ((flags & FR_LOGBODY) == 0) {
365 mlen = 0;
366 }
367 if (mlen < 0)
368 mlen = 0;
369 ipfl.fl_plen = (u_char)mlen;
370 ipfl.fl_hlen = (u_char)hlen;
371 ipfl.fl_rule = fin->fin_rule;
372 (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN);
373 if (fin->fin_fr != NULL) {
374 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel;
375 ipfl.fl_logtag = fin->fin_fr->fr_logtag;
376 } else {
377 ipfl.fl_loglevel = 0xffff;
378 ipfl.fl_logtag = FR_NOLOGTAG;
379 }
380 if (fin->fin_nattag != NULL)
381 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag,
382 sizeof(ipfl.fl_nattag));
383 ipfl.fl_flags = flags;
384 ipfl.fl_dir = fin->fin_out;
385 ipfl.fl_lflags = fin->fin_flx;
386 ptrs[0] = (void *)&ipfl;
387 sizes[0] = sizeof(ipfl);
388 types[0] = 0;
389 # if defined(MENTAT) && defined(_KERNEL)
390 /*
391 * Are we copied from the mblk or an aligned array ?
392 */
393 if (fin->fin_ip == (ip_t *)m->b_rptr) {
394 ptrs[1] = m;
395 sizes[1] = hlen + mlen;
396 types[1] = 1;
397 } else {
398 ptrs[1] = fin->fin_ip;
399 sizes[1] = hlen + mlen;
400 types[1] = 0;
401 }
402 # else
403 ptrs[1] = m;
404 sizes[1] = hlen + mlen;
405 types[1] = 1;
406 # endif /* MENTAT */
407 return ipllog(IPL_LOGIPF, fin, ptrs, sizes, types, 2, fin->fin_ifs);
408 }
409
410
411 /* ------------------------------------------------------------------------ */
412 /* Function: ipllog */
413 /* Returns: int - 0 == success, -1 == failure */
414 /* Parameters: dev(I) - device that owns this log record */
415 /* fin(I) - pointer to packet information */
416 /* items(I) - array of pointers to log data */
417 /* itemsz(I) - array of size of valid memory pointed to */
418 /* types(I) - type of data pointed to by items pointers */
419 /* cnt(I) - number of elements in arrays items/itemsz/types */
420 /* */
421 /* Takes an array of parameters and constructs one record to include the */
422 /* miscellaneous packet information, as well as packet data, for reading */
423 /* from the log device. */
424 /* ------------------------------------------------------------------------ */
ipllog(dev,fin,items,itemsz,types,cnt,ifs)425 int ipllog(dev, fin, items, itemsz, types, cnt, ifs)
426 int dev;
427 fr_info_t *fin;
428 void **items;
429 size_t *itemsz;
430 int *types, cnt;
431 ipf_stack_t *ifs;
432 {
433 caddr_t buf, ptr;
434 iplog_t *ipl;
435 size_t len;
436 int i;
437 SPL_INT(s);
438
439 /*
440 * Check to see if this log record has a CRC which matches the last
441 * record logged. If it does, just up the count on the previous one
442 * rather than create a new one.
443 */
444 if (ifs->ifs_ipl_suppress) {
445 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
446 if ((fin != NULL) && (fin->fin_off == 0)) {
447 if ((ifs->ifs_ipll[dev] != NULL) &&
448 bcmp((char *)fin, (char *)&ifs->ifs_iplcrc[dev],
449 FI_LCSIZE) == 0) {
450 ifs->ifs_ipll[dev]->ipl_count++;
451 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
452 return 0;
453 }
454 bcopy((char *)fin, (char *)&ifs->ifs_iplcrc[dev],
455 FI_LCSIZE);
456 } else
457 bzero((char *)&ifs->ifs_iplcrc[dev], FI_CSIZE);
458 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
459 }
460
461 /*
462 * Get the total amount of data to be logged.
463 */
464 for (i = 0, len = sizeof(iplog_t); i < cnt; i++)
465 len += itemsz[i];
466
467 /*
468 * check that we have space to record this information and can
469 * allocate that much.
470 */
471 KMALLOCS(buf, caddr_t, len);
472 if (buf == NULL)
473 return -1;
474 SPL_NET(s);
475 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
476 if ((ifs->ifs_iplused[dev] + len) > IPFILTER_LOGSIZE) {
477 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
478 SPL_X(s);
479 KFREES(buf, len);
480 return -1;
481 }
482 ifs->ifs_iplused[dev] += len;
483 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
484 SPL_X(s);
485
486 /*
487 * advance the log pointer to the next empty record and deduct the
488 * amount of space we're going to use.
489 */
490 ipl = (iplog_t *)buf;
491 ipl->ipl_magic = ipl_magic[dev];
492 ipl->ipl_count = 1;
493 ipl->ipl_next = NULL;
494 ipl->ipl_dsize = len;
495 #ifdef _KERNEL
496 GETKTIME(&ipl->ipl_sec);
497 #else
498 ipl->ipl_sec = 0;
499 ipl->ipl_usec = 0;
500 #endif
501
502 /*
503 * Loop through all the items to be logged, copying each one to the
504 * buffer. Use bcopy for normal data or the mb_t copyout routine.
505 */
506 for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) {
507 if (types[i] == 0) {
508 bcopy(items[i], ptr, itemsz[i]);
509 } else if (types[i] == 1) {
510 COPYDATA(items[i], 0, itemsz[i], ptr);
511 }
512 ptr += itemsz[i];
513 }
514 SPL_NET(s);
515 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
516 ifs->ifs_ipll[dev] = ipl;
517 *ifs->ifs_iplh[dev] = ipl;
518 ifs->ifs_iplh[dev] = &ipl->ipl_next;
519
520 /*
521 * Now that the log record has been completed and added to the queue,
522 * wake up any listeners who may want to read it.
523 */
524 # if defined(SOLARIS) && defined(_KERNEL)
525 cv_signal(&ifs->ifs_iplwait);
526 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
527 # else
528 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
529 WAKEUP(&ifs->ifs_iplh, dev);
530 # endif
531 SPL_X(s);
532 # ifdef IPL_SELECT
533 iplog_input_ready(dev);
534 # endif
535 return 0;
536 }
537
538
539 /* ------------------------------------------------------------------------ */
540 /* Function: ipflog_read */
541 /* Returns: int - 0 == success, else error value. */
542 /* Parameters: unit(I) - device we are reading from */
543 /* uio(O) - pointer to information about where to store data */
544 /* */
545 /* Called to handle a read on an IPFilter device. Returns only complete */
546 /* log messages - will not partially copy a log record out to userland. */
547 /* */
548 /* NOTE: This function will block and wait for a signal to return data if */
549 /* there is none present. Asynchronous I/O is not implemented. */
550 /* ------------------------------------------------------------------------ */
ipflog_read(unit,uio,ifs)551 int ipflog_read(unit, uio, ifs)
552 minor_t unit;
553 struct uio *uio;
554 ipf_stack_t *ifs;
555 {
556 size_t dlen, copied;
557 int error = 0;
558 iplog_t *ipl;
559 SPL_INT(s);
560
561 /*
562 * Sanity checks. Make sure the minor # is valid and we're copying
563 * a valid chunk of data.
564 */
565 if (IPL_LOGMAX < unit)
566 return ENXIO;
567 if (uio->uio_resid == 0)
568 return 0;
569 if ((uio->uio_resid < sizeof(iplog_t)) ||
570 (uio->uio_resid > ifs->ifs_ipl_logsize))
571 return EINVAL;
572
573 /*
574 * Lock the log so we can snapshot the variables. Wait for a signal
575 * if the log is empty.
576 */
577 SPL_NET(s);
578 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
579
580 while (ifs->ifs_iplt[unit] == NULL) {
581 # if defined(SOLARIS) && defined(_KERNEL)
582 /*
583 * Prevent a deadlock with ipldetach() - see the "ipfilter
584 * kernel module mutexes and locking" comment block in solaris.c
585 * for details.
586 */
587 RWLOCK_EXIT(&ifs->ifs_ipf_global);
588 if (!cv_wait_sig(&ifs->ifs_iplwait, &ifs->ifs_ipl_mutex.ipf_lk)) {
589 READ_ENTER(&ifs->ifs_ipf_global);
590 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
591 return EINTR;
592 }
593 READ_ENTER(&ifs->ifs_ipf_global);
594 # else
595 # if defined(__hpux) && defined(_KERNEL)
596 lock_t *l;
597
598 # ifdef IPL_SELECT
599 if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) {
600 /* this is no blocking system call */
601 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
602 return 0;
603 }
604 # endif
605
606 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
607 l = get_sleep_lock(&ifs->ifs_iplh[unit]);
608 error = sleep(&ifs->ifs_iplh[unit], PZERO+1);
609 spinunlock(l);
610 # else
611 # if defined(__osf__) && defined(_KERNEL)
612 error = mpsleep(&ifs->ifs_iplh[unit], PSUSP|PCATCH, "iplread", 0,
613 &ifs->ifs_ipl_mutex, MS_LOCK_SIMPLE);
614 # else
615 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
616 SPL_X(s);
617 error = SLEEP(&ifs->ifs_iplh[unit], "ipl sleep");
618 # endif /* __osf__ */
619 # endif /* __hpux */
620 if (error)
621 return error;
622 SPL_NET(s);
623 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
624 # endif /* SOLARIS */
625 }
626
627 # if (BSD >= 199101) || defined(__FreeBSD__) || defined(__osf__)
628 uio->uio_rw = UIO_READ;
629 # endif
630
631 for (copied = 0; ((ipl = ifs->ifs_iplt[unit]) != NULL); copied += dlen) {
632 dlen = ipl->ipl_dsize;
633 if (dlen > uio->uio_resid)
634 break;
635 /*
636 * Don't hold the mutex over the uiomove call.
637 */
638 ifs->ifs_iplt[unit] = ipl->ipl_next;
639 ifs->ifs_iplused[unit] -= dlen;
640 if (ifs->ifs_iplt[unit] == NULL) {
641 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit];
642 ifs->ifs_ipll[unit] = NULL;
643 }
644 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
645 SPL_X(s);
646 error = UIOMOVE((caddr_t)ipl, dlen, UIO_READ, uio);
647 if (error) {
648 SPL_NET(s);
649 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
650 ifs->ifs_iplused[unit] += dlen;
651 ipl->ipl_next = ifs->ifs_iplt[unit];
652 ifs->ifs_iplt[unit] = ipl;
653 ifs->ifs_ipll[unit] = ipl;
654 if (ifs->ifs_iplh[unit] == &ifs->ifs_iplt[unit]) {
655 *ifs->ifs_iplh[unit] = ipl;
656 ifs->ifs_iplh[unit] = &ipl->ipl_next;
657 }
658 break;
659 }
660 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
661 KFREES((caddr_t)ipl, dlen);
662 SPL_NET(s);
663 }
664
665 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
666 SPL_X(s);
667 return error;
668 }
669
670
671 /* ------------------------------------------------------------------------ */
672 /* Function: ipflog_clear */
673 /* Returns: int - number of log bytes cleared. */
674 /* Parameters: unit(I) - device we are reading from */
675 /* */
676 /* Deletes all queued up log records for a given output device. */
677 /* ------------------------------------------------------------------------ */
ipflog_clear(unit,ifs)678 int ipflog_clear(unit, ifs)
679 minor_t unit;
680 ipf_stack_t *ifs;
681 {
682 iplog_t *ipl;
683 int used;
684 SPL_INT(s);
685
686 SPL_NET(s);
687 MUTEX_ENTER(&ifs->ifs_ipl_mutex);
688 while ((ipl = ifs->ifs_iplt[unit]) != NULL) {
689 ifs->ifs_iplt[unit] = ipl->ipl_next;
690 KFREES((caddr_t)ipl, ipl->ipl_dsize);
691 }
692 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit];
693 ifs->ifs_ipll[unit] = NULL;
694 used = ifs->ifs_iplused[unit];
695 ifs->ifs_iplused[unit] = 0;
696 bzero((char *)&ifs->ifs_iplcrc[unit], FI_CSIZE);
697 MUTEX_EXIT(&ifs->ifs_ipl_mutex);
698 SPL_X(s);
699 return used;
700 }
701 #endif /* IPFILTER_LOG */
702