1
2 /*
3 * Copyright (C) 2012 by Darren Reed.
4 *
5 * See the IPFILTER.LICENCE file for details on licencing.
6 * Id: ip_log.c,v 2.75.2.19 2007/09/09 11:32:06 darrenr Exp $
7 */
8 #include <sys/param.h>
9 #if defined(KERNEL) || defined(_KERNEL)
10 # undef KERNEL
11 # undef _KERNEL
12 # define KERNEL 1
13 # define _KERNEL 1
14 #endif
15 #if defined(__FreeBSD__) && !defined(_KERNEL)
16 # include <osreldate.h>
17 #endif
18 #ifndef SOLARIS
19 # if defined(sun) && defined(__SVR4)
20 # define SOLARIS 1
21 # else
22 # define SOLARIS 0
23 # endif
24 #endif
25 #include <sys/errno.h>
26 #include <sys/types.h>
27 #include <sys/file.h>
28 #ifndef _KERNEL
29 # include <stdio.h>
30 # include <string.h>
31 # include <stdlib.h>
32 # include <ctype.h>
33 # define _KERNEL
34 # define KERNEL
35 # include <sys/uio.h>
36 # undef _KERNEL
37 # undef KERNEL
38 #endif
39 #if defined(__FreeBSD__) && defined(_KERNEL)
40 # include <sys/fcntl.h>
41 # include <sys/filio.h>
42 #else
43 # include <sys/ioctl.h>
44 #endif
45 #include <sys/time.h>
46 #if defined(_KERNEL)
47 # include <sys/systm.h>
48 # if (defined(NetBSD) && (__NetBSD_Version__ >= 104000000))
49 # include <sys/proc.h>
50 # endif
51 #endif /* _KERNEL */
52 # if defined(NetBSD) || defined(__FreeBSD__)
53 # include <sys/dirent.h>
54 # include <sys/mbuf.h>
55 # include <sys/select.h>
56 # endif
57 # if defined(__FreeBSD__)
58 # include <sys/selinfo.h>
59 # endif
60 #if SOLARIS && defined(_KERNEL)
61 # include <sys/filio.h>
62 # include <sys/cred.h>
63 # include <sys/ddi.h>
64 # include <sys/sunddi.h>
65 # include <sys/ksynch.h>
66 # include <sys/kmem.h>
67 # include <sys/mkdev.h>
68 # include <sys/dditypes.h>
69 # include <sys/cmn_err.h>
70 #endif /* SOLARIS && _KERNEL */
71 # include <sys/protosw.h>
72 #include <sys/socket.h>
73
74 #include <net/if.h>
75 #ifdef sun
76 # include <net/af.h>
77 #endif
78 #if defined(__FreeBSD__)
79 # include <net/if_var.h>
80 #endif
81 #include <netinet/in.h>
82 # include <netinet/in_var.h>
83 #include <netinet/in_systm.h>
84 #include <netinet/ip.h>
85 #include <netinet/tcp.h>
86 #include <netinet/udp.h>
87 #include <netinet/ip_icmp.h>
88 #ifdef USE_INET6
89 # include <netinet/icmp6.h>
90 #endif
91 # include <netinet/ip_var.h>
92 #ifndef _KERNEL
93 # include <syslog.h>
94 #endif
95 #include "netinet/ip_compat.h"
96 #include <netinet/tcpip.h>
97 #include "netinet/ip_fil.h"
98 #include "netinet/ip_nat.h"
99 #include "netinet/ip_frag.h"
100 #include "netinet/ip_state.h"
101 #include "netinet/ip_auth.h"
102 #if defined(__FreeBSD__) || defined(__NetBSD__)
103 # include <sys/malloc.h>
104 #endif
105 /* END OF INCLUDES */
106
107 #ifdef IPFILTER_LOG
108
109 typedef struct ipf_log_softc_s {
110 ipfmutex_t ipl_mutex[IPL_LOGSIZE];
111 # if SOLARIS && defined(_KERNEL)
112 kcondvar_t ipl_wait[IPL_LOGSIZE];
113 # endif
114 iplog_t **iplh[IPL_LOGSIZE];
115 iplog_t *iplt[IPL_LOGSIZE];
116 iplog_t *ipll[IPL_LOGSIZE];
117 u_long ipl_logfail[IPL_LOGSIZE];
118 u_long ipl_logok[IPL_LOGSIZE];
119 fr_info_t ipl_crc[IPL_LOGSIZE];
120 u_32_t ipl_counter[IPL_LOGSIZE];
121 int ipl_suppress;
122 int ipl_logall;
123 int ipl_log_init;
124 int ipl_logsize;
125 int ipl_used[IPL_LOGSIZE];
126 int ipl_magic[IPL_LOGSIZE];
127 ipftuneable_t *ipf_log_tune;
128 int ipl_readers[IPL_LOGSIZE];
129 } ipf_log_softc_t;
130
131 static int magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE,
132 IPL_MAGIC, IPL_MAGIC, IPL_MAGIC,
133 IPL_MAGIC, IPL_MAGIC };
134
135 static ipftuneable_t ipf_log_tuneables[] = {
136 /* log */
137 { { (void *)offsetof(ipf_log_softc_t, ipl_suppress) },
138 "log_suppress", 0, 1,
139 stsizeof(ipf_log_softc_t, ipl_suppress),
140 0, NULL, NULL },
141 { { (void *)offsetof(ipf_log_softc_t, ipl_logall) },
142 "log_all", 0, 1,
143 stsizeof(ipf_log_softc_t, ipl_logall),
144 0, NULL, NULL },
145 { { (void *)offsetof(ipf_log_softc_t, ipl_logsize) },
146 "log_size", 0, 0x80000,
147 stsizeof(ipf_log_softc_t, ipl_logsize),
148 0, NULL, NULL },
149 { { NULL }, NULL, 0, 0,
150 0,
151 0, NULL, NULL }
152 };
153
154
155 int
ipf_log_main_load(void)156 ipf_log_main_load(void)
157 {
158 return (0);
159 }
160
161
162 int
ipf_log_main_unload(void)163 ipf_log_main_unload(void)
164 {
165 return (0);
166 }
167
168 /* ------------------------------------------------------------------------ */
169 /* Function: ipf_log_soft_create */
170 /* Returns: void * - NULL = failure, else pointer to log context data */
171 /* Parameters: softc(I) - pointer to soft context main structure */
172 /* */
173 /* Initialise log buffers & pointers. Also iniialised the CRC to a local */
174 /* secret for use in calculating the "last log checksum". */
175 /* ------------------------------------------------------------------------ */
176 void *
ipf_log_soft_create(ipf_main_softc_t * softc)177 ipf_log_soft_create(ipf_main_softc_t *softc)
178 {
179 ipf_log_softc_t *softl;
180 int i;
181
182 KMALLOC(softl, ipf_log_softc_t *);
183 if (softl == NULL)
184 return (NULL);
185
186 bzero((char *)softl, sizeof(*softl));
187 bcopy((char *)magic, (char *)softl->ipl_magic, sizeof(magic));
188
189 softl->ipf_log_tune = ipf_tune_array_copy(softl,
190 sizeof(ipf_log_tuneables),
191 ipf_log_tuneables);
192 if (softl->ipf_log_tune == NULL) {
193 ipf_log_soft_destroy(softc, softl);
194 return (NULL);
195 }
196 if (ipf_tune_array_link(softc, softl->ipf_log_tune) == -1) {
197 ipf_log_soft_destroy(softc, softl);
198 return (NULL);
199 }
200
201 for (i = IPL_LOGMAX; i >= 0; i--) {
202 MUTEX_INIT(&softl->ipl_mutex[i], "ipf log mutex");
203 }
204
205 softl->ipl_suppress = 1;
206 softl->ipl_logall = 0;
207 softl->ipl_log_init = 0;
208 softl->ipl_logsize = IPFILTER_LOGSIZE;
209
210 return (softl);
211 }
212
213 /* ------------------------------------------------------------------------ */
214 /* Function: ipf_log_soft_init */
215 /* Returns: int - 0 == success (always returned) */
216 /* Parameters: softc(I) - pointer to soft context main structure */
217 /* */
218 /* Initialise log buffers & pointers. Also iniialised the CRC to a local */
219 /* secret for use in calculating the "last log checksum". */
220 /* ------------------------------------------------------------------------ */
221 int
ipf_log_soft_init(ipf_main_softc_t * softc,void * arg)222 ipf_log_soft_init(ipf_main_softc_t *softc, void *arg)
223 {
224 ipf_log_softc_t *softl = arg;
225 int i;
226
227 for (i = IPL_LOGMAX; i >= 0; i--) {
228 softl->iplt[i] = NULL;
229 softl->ipll[i] = NULL;
230 softl->iplh[i] = &softl->iplt[i];
231 bzero((char *)&softl->ipl_crc[i], sizeof(softl->ipl_crc[i]));
232 }
233
234
235 softl->ipl_log_init = 1;
236
237 return (0);
238 }
239
240
241 /* ------------------------------------------------------------------------ */
242 /* Function: ipf_log_soft_fini */
243 /* Parameters: softc(I) - pointer to soft context main structure */
244 /* arg(I) - pointer to log context structure */
245 /* */
246 /* Clean up any log data that has accumulated without being read. */
247 /* ------------------------------------------------------------------------ */
248 int
ipf_log_soft_fini(ipf_main_softc_t * softc,void * arg)249 ipf_log_soft_fini(ipf_main_softc_t *softc, void *arg)
250 {
251 ipf_log_softc_t *softl = arg;
252 int i;
253
254 if (softl->ipl_log_init == 0)
255 return (0);
256
257 softl->ipl_log_init = 0;
258
259 for (i = IPL_LOGMAX; i >= 0; i--) {
260 (void) ipf_log_clear(softc, i);
261
262 /*
263 * This is a busy-wait loop so as to avoid yet another lock
264 * to wait on.
265 */
266 MUTEX_ENTER(&softl->ipl_mutex[i]);
267 while (softl->ipl_readers[i] > 0) {
268 # if SOLARIS && defined(_KERNEL)
269 cv_broadcast(&softl->ipl_wait[i]);
270 MUTEX_EXIT(&softl->ipl_mutex[i]);
271 delay(100);
272 pollwakeup(&softc->ipf_poll_head[i], POLLRDNORM);
273 # else
274 MUTEX_EXIT(&softl->ipl_mutex[i]);
275 WAKEUP(softl->iplh, i);
276 POLLWAKEUP(i);
277 # endif
278 MUTEX_ENTER(&softl->ipl_mutex[i]);
279 }
280 MUTEX_EXIT(&softl->ipl_mutex[i]);
281 }
282
283 return (0);
284 }
285
286
287 /* ------------------------------------------------------------------------ */
288 /* Function: ipf_log_soft_destroy */
289 /* Parameters: softc(I) - pointer to soft context main structure */
290 /* arg(I) - pointer to log context structure */
291 /* */
292 /* When this function is called, it is expected that there are no longer */
293 /* any threads active in the reading code path or the logging code path. */
294 /* ------------------------------------------------------------------------ */
295 void
ipf_log_soft_destroy(ipf_main_softc_t * softc,void * arg)296 ipf_log_soft_destroy(ipf_main_softc_t *softc, void *arg)
297 {
298 ipf_log_softc_t *softl = arg;
299 int i;
300
301 for (i = IPL_LOGMAX; i >= 0; i--) {
302 # if SOLARIS && defined(_KERNEL)
303 cv_destroy(&softl->ipl_wait[i]);
304 # endif
305 MUTEX_DESTROY(&softl->ipl_mutex[i]);
306 }
307
308 if (softl->ipf_log_tune != NULL) {
309 ipf_tune_array_unlink(softc, softl->ipf_log_tune);
310 KFREES(softl->ipf_log_tune, sizeof(ipf_log_tuneables));
311 softl->ipf_log_tune = NULL;
312 }
313
314 KFREE(softl);
315 }
316
317
318 /* ------------------------------------------------------------------------ */
319 /* Function: ipf_log_pkt */
320 /* Returns: int - 0 == success, -1 == failure */
321 /* Parameters: fin(I) - pointer to packet information */
322 /* flags(I) - flags from filter rules */
323 /* */
324 /* Create a log record for a packet given that it has been triggered by a */
325 /* rule (or the default setting). Calculate the transport protocol header */
326 /* size using predetermined size of a couple of popular protocols and thus */
327 /* how much data to copy into the log, including part of the data body if */
328 /* requested. */
329 /* ------------------------------------------------------------------------ */
330 int
ipf_log_pkt(fr_info_t * fin,u_int flags)331 ipf_log_pkt(fr_info_t *fin, u_int flags)
332 {
333 ipf_main_softc_t *softc = fin->fin_main_soft;
334 ipf_log_softc_t *softl = softc->ipf_log_soft;
335 register size_t hlen;
336 int types[2], mlen;
337 size_t sizes[2];
338 void *ptrs[2];
339 ipflog_t ipfl;
340 u_char p;
341 mb_t *m;
342 # if SOLARIS && defined(_KERNEL) && !defined(FW_HOOKS)
343 qif_t *ifp;
344 # else
345 struct ifnet *ifp;
346 # endif /* SOLARIS */
347
348 m = fin->fin_m;
349 if (m == NULL)
350 return (-1);
351
352 ipfl.fl_nattag.ipt_num[0] = 0;
353 ifp = fin->fin_ifp;
354 hlen = (char *)fin->fin_dp - (char *)fin->fin_ip;
355
356 /*
357 * calculate header size.
358 */
359 if (fin->fin_off == 0) {
360 p = fin->fin_fi.fi_p;
361 if (p == IPPROTO_TCP)
362 hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
363 else if (p == IPPROTO_UDP)
364 hlen += MIN(sizeof(udphdr_t), fin->fin_dlen);
365 else if (p == IPPROTO_ICMP) {
366 struct icmp *icmp;
367
368 icmp = (struct icmp *)fin->fin_dp;
369
370 /*
371 * For ICMP, if the packet is an error packet, also
372 * include the information about the packet which
373 * caused the error.
374 */
375 switch (icmp->icmp_type)
376 {
377 case ICMP_UNREACH :
378 case ICMP_SOURCEQUENCH :
379 case ICMP_REDIRECT :
380 case ICMP_TIMXCEED :
381 case ICMP_PARAMPROB :
382 hlen += MIN(sizeof(struct icmp) + 8,
383 fin->fin_dlen);
384 break;
385 default :
386 hlen += MIN(sizeof(struct icmp),
387 fin->fin_dlen);
388 break;
389 }
390 }
391 # ifdef USE_INET6
392 else if (p == IPPROTO_ICMPV6) {
393 struct icmp6_hdr *icmp;
394
395 icmp = (struct icmp6_hdr *)fin->fin_dp;
396
397 /*
398 * For ICMPV6, if the packet is an error packet, also
399 * include the information about the packet which
400 * caused the error.
401 */
402 if (icmp->icmp6_type < 128) {
403 hlen += MIN(sizeof(struct icmp6_hdr) + 8,
404 fin->fin_dlen);
405 } else {
406 hlen += MIN(sizeof(struct icmp6_hdr),
407 fin->fin_dlen);
408 }
409 }
410 # endif
411 }
412 /*
413 * Get the interface number and name to which this packet is
414 * currently associated.
415 */
416 # if SOLARIS && defined(_KERNEL)
417 # if !defined(FW_HOOKS)
418 ipfl.fl_unit = (u_int)ifp->qf_ppa;
419 # endif
420 COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname);
421 # else
422 # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
423 defined(__FreeBSD__)
424 COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname);
425 # else
426 ipfl.fl_unit = (u_int)ifp->if_unit;
427 # if defined(_KERNEL)
428 if ((ipfl.fl_ifname[0] = ifp->if_name[0]))
429 if ((ipfl.fl_ifname[1] = ifp->if_name[1]))
430 if ((ipfl.fl_ifname[2] = ifp->if_name[2]))
431 ipfl.fl_ifname[3] = ifp->if_name[3];
432 # else
433 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname));
434 ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0';
435 # endif
436 # endif
437 # endif /* __hpux || SOLARIS */
438 mlen = fin->fin_plen - hlen;
439 if (!softl->ipl_logall) {
440 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0;
441 } else if ((flags & FR_LOGBODY) == 0) {
442 mlen = 0;
443 }
444 if (mlen < 0)
445 mlen = 0;
446 ipfl.fl_plen = (u_char)mlen;
447 ipfl.fl_hlen = (u_char)hlen;
448 ipfl.fl_rule = fin->fin_rule;
449 (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN);
450 if (fin->fin_fr != NULL) {
451 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel;
452 ipfl.fl_logtag = fin->fin_fr->fr_logtag;
453 } else {
454 ipfl.fl_loglevel = 0xffff;
455 ipfl.fl_logtag = FR_NOLOGTAG;
456 }
457 if (fin->fin_nattag != NULL)
458 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag,
459 sizeof(ipfl.fl_nattag));
460 ipfl.fl_flags = flags;
461 ipfl.fl_breason = (fin->fin_reason & 0xff);
462 ipfl.fl_dir = fin->fin_out;
463 ipfl.fl_lflags = fin->fin_flx;
464 ipfl.fl_family = fin->fin_family;
465 ptrs[0] = (void *)&ipfl;
466 sizes[0] = sizeof(ipfl);
467 types[0] = 0;
468 # if SOLARIS && defined(_KERNEL)
469 /*
470 * Are we copied from the mblk or an aligned array ?
471 */
472 if (fin->fin_ip == (ip_t *)m->b_rptr) {
473 ptrs[1] = m;
474 sizes[1] = hlen + mlen;
475 types[1] = 1;
476 } else {
477 ptrs[1] = fin->fin_ip;
478 sizes[1] = hlen + mlen;
479 types[1] = 0;
480 }
481 # else
482 ptrs[1] = m;
483 sizes[1] = hlen + mlen;
484 types[1] = 1;
485 # endif /* SOLARIS */
486 return (ipf_log_items(softc, IPL_LOGIPF, fin, ptrs, sizes, types, 2));
487 }
488
489
490 /* ------------------------------------------------------------------------ */
491 /* Function: ipf_log_items */
492 /* Returns: int - 0 == success, -1 == failure */
493 /* Parameters: softc(I) - pointer to main soft context */
494 /* unit(I) - device we are reading from */
495 /* fin(I) - pointer to packet information */
496 /* items(I) - array of pointers to log data */
497 /* itemsz(I) - array of size of valid memory pointed to */
498 /* types(I) - type of data pointed to by items pointers */
499 /* cnt(I) - number of elements in arrays items/itemsz/types */
500 /* */
501 /* Takes an array of parameters and constructs one record to include the */
502 /* miscellaneous packet information, as well as packet data, for reading */
503 /* from the log device. */
504 /* ------------------------------------------------------------------------ */
505 int
ipf_log_items(ipf_main_softc_t * softc,int unit,fr_info_t * fin,void ** items,size_t * itemsz,int * types,int cnt)506 ipf_log_items(ipf_main_softc_t *softc, int unit, fr_info_t *fin, void **items,
507 size_t *itemsz, int *types, int cnt)
508 {
509 ipf_log_softc_t *softl = softc->ipf_log_soft;
510 caddr_t buf, ptr;
511 iplog_t *ipl;
512 size_t len;
513 int i;
514 SPL_INT(s);
515
516 /*
517 * Get the total amount of data to be logged.
518 */
519 for (i = 0, len = sizeof(iplog_t); i < cnt; i++)
520 len += itemsz[i];
521
522 SPL_NET(s);
523 MUTEX_ENTER(&softl->ipl_mutex[unit]);
524 softl->ipl_counter[unit]++;
525 /*
526 * check that we have space to record this information and can
527 * allocate that much.
528 */
529 if ((softl->ipl_used[unit] + len) > softl->ipl_logsize) {
530 softl->ipl_logfail[unit]++;
531 MUTEX_EXIT(&softl->ipl_mutex[unit]);
532 return (-1);
533 }
534
535 KMALLOCS(buf, caddr_t, len);
536 if (buf == NULL) {
537 softl->ipl_logfail[unit]++;
538 MUTEX_EXIT(&softl->ipl_mutex[unit]);
539 return (-1);
540 }
541 ipl = (iplog_t *)buf;
542 ipl->ipl_magic = softl->ipl_magic[unit];
543 ipl->ipl_count = 1;
544 ipl->ipl_seqnum = softl->ipl_counter[unit];
545 ipl->ipl_next = NULL;
546 ipl->ipl_dsize = len;
547 #ifdef _KERNEL
548 GETKTIME(&ipl->ipl_sec);
549 #else
550 ipl->ipl_sec = 0;
551 ipl->ipl_usec = 0;
552 #endif
553
554 /*
555 * Loop through all the items to be logged, copying each one to the
556 * buffer. Use bcopy for normal data or the mb_t copyout routine.
557 */
558 for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) {
559 if (types[i] == 0) {
560 bcopy(items[i], ptr, itemsz[i]);
561 } else if (types[i] == 1) {
562 COPYDATA(items[i], 0, itemsz[i], ptr);
563 }
564 ptr += itemsz[i];
565 }
566 /*
567 * Check to see if this log record has a CRC which matches the last
568 * record logged. If it does, just up the count on the previous one
569 * rather than create a new one.
570 */
571 if (softl->ipl_suppress) {
572 if ((fin != NULL) && (fin->fin_off == 0)) {
573 if ((softl->ipll[unit] != NULL) &&
574 (fin->fin_crc == softl->ipl_crc[unit].fin_crc) &&
575 bcmp((char *)fin, (char *)&softl->ipl_crc[unit],
576 FI_LCSIZE) == 0) {
577 softl->ipll[unit]->ipl_count++;
578 MUTEX_EXIT(&softl->ipl_mutex[unit]);
579 SPL_X(s);
580 KFREES(buf, len);
581 return (0);
582 }
583 bcopy((char *)fin, (char *)&softl->ipl_crc[unit],
584 FI_LCSIZE);
585 softl->ipl_crc[unit].fin_crc = fin->fin_crc;
586 } else
587 bzero((char *)&softl->ipl_crc[unit], FI_CSIZE);
588 }
589
590 /*
591 * advance the log pointer to the next empty record and deduct the
592 * amount of space we're going to use.
593 */
594 softl->ipl_logok[unit]++;
595 softl->ipll[unit] = ipl;
596 *softl->iplh[unit] = ipl;
597 softl->iplh[unit] = &ipl->ipl_next;
598 softl->ipl_used[unit] += len;
599
600 /*
601 * Now that the log record has been completed and added to the queue,
602 * wake up any listeners who may want to read it.
603 */
604 # if SOLARIS && defined(_KERNEL)
605 cv_signal(&softl->ipl_wait[unit]);
606 MUTEX_EXIT(&softl->ipl_mutex[unit]);
607 pollwakeup(&softc->ipf_poll_head[unit], POLLRDNORM);
608 # else
609 MUTEX_EXIT(&softl->ipl_mutex[unit]);
610 WAKEUP(softl->iplh, unit);
611 POLLWAKEUP(unit);
612 # endif
613 SPL_X(s);
614 return (0);
615 }
616
617
618 /* ------------------------------------------------------------------------ */
619 /* Function: ipf_log_read */
620 /* Returns: int - 0 == success, else error value. */
621 /* Parameters: softc(I) - pointer to main soft context */
622 /* unit(I) - device we are reading from */
623 /* uio(O) - pointer to information about where to store data */
624 /* */
625 /* Called to handle a read on an IPFilter device. Returns only complete */
626 /* log messages - will not partially copy a log record out to userland. */
627 /* */
628 /* NOTE: This function will block and wait for a signal to return data if */
629 /* there is none present. Asynchronous I/O is not implemented. */
630 /* ------------------------------------------------------------------------ */
631 int
ipf_log_read(ipf_main_softc_t * softc,minor_t unit,struct uio * uio)632 ipf_log_read(ipf_main_softc_t *softc, minor_t unit, struct uio *uio)
633 {
634 ipf_log_softc_t *softl = softc->ipf_log_soft;
635 size_t dlen;
636 int error = 0;
637 iplog_t *ipl;
638 SPL_INT(s);
639
640 if (softl->ipl_log_init == 0) {
641 IPFERROR(40007);
642 return (0);
643 }
644
645 /*
646 * Sanity checks. Make sure the minor # is valid and we're copying
647 * a valid chunk of data.
648 */
649 if (IPL_LOGMAX < unit) {
650 IPFERROR(40001);
651 return (ENXIO);
652 }
653 if (uio->uio_resid == 0)
654 return (0);
655
656 if (uio->uio_resid < sizeof(iplog_t)) {
657 IPFERROR(40002);
658 return (EINVAL);
659 }
660 if (uio->uio_resid > softl->ipl_logsize) {
661 IPFERROR(40005);
662 return (EINVAL);
663 }
664
665 /*
666 * Lock the log so we can snapshot the variables. Wait for a signal
667 * if the log is empty.
668 */
669 SPL_NET(s);
670 MUTEX_ENTER(&softl->ipl_mutex[unit]);
671 softl->ipl_readers[unit]++;
672
673 while (softl->ipl_log_init == 1 && softl->iplt[unit] == NULL) {
674 # if SOLARIS && defined(_KERNEL)
675 if (!cv_wait_sig(&softl->ipl_wait[unit],
676 &softl->ipl_mutex[unit].ipf_lk)) {
677 softl->ipl_readers[unit]--;
678 MUTEX_EXIT(&softl->ipl_mutex[unit]);
679 IPFERROR(40003);
680 return (EINTR);
681 }
682 # else
683 MUTEX_EXIT(&softl->ipl_mutex[unit]);
684 SPL_X(s);
685 error = SLEEP(unit + softl->iplh, "ipl sleep");
686 SPL_NET(s);
687 MUTEX_ENTER(&softl->ipl_mutex[unit]);
688 if (error) {
689 softl->ipl_readers[unit]--;
690 MUTEX_EXIT(&softl->ipl_mutex[unit]);
691 IPFERROR(40004);
692 return (error);
693 }
694 # endif /* SOLARIS */
695 }
696 if (softl->ipl_log_init != 1) {
697 softl->ipl_readers[unit]--;
698 MUTEX_EXIT(&softl->ipl_mutex[unit]);
699 IPFERROR(40008);
700 return (EIO);
701 }
702
703 # if defined(BSD)
704 uio->uio_rw = UIO_READ;
705 # endif
706
707 for (; (ipl = softl->iplt[unit]) != NULL;) {
708 dlen = ipl->ipl_dsize;
709 if (dlen > uio->uio_resid)
710 break;
711 /*
712 * Don't hold the mutex over the uiomove call.
713 */
714 softl->iplt[unit] = ipl->ipl_next;
715 softl->ipl_used[unit] -= dlen;
716 MUTEX_EXIT(&softl->ipl_mutex[unit]);
717 SPL_X(s);
718 error = UIOMOVE(ipl, dlen, UIO_READ, uio);
719 if (error) {
720 SPL_NET(s);
721 MUTEX_ENTER(&softl->ipl_mutex[unit]);
722 IPFERROR(40006);
723 ipl->ipl_next = softl->iplt[unit];
724 softl->iplt[unit] = ipl;
725 softl->ipl_used[unit] += dlen;
726 break;
727 }
728 MUTEX_ENTER(&softl->ipl_mutex[unit]);
729 KFREES((caddr_t)ipl, dlen);
730 SPL_NET(s);
731 }
732 if (!softl->iplt[unit]) {
733 softl->ipl_used[unit] = 0;
734 softl->iplh[unit] = &softl->iplt[unit];
735 softl->ipll[unit] = NULL;
736 }
737
738 softl->ipl_readers[unit]--;
739 MUTEX_EXIT(&softl->ipl_mutex[unit]);
740 SPL_X(s);
741 return (error);
742 }
743
744
745 /* ------------------------------------------------------------------------ */
746 /* Function: ipf_log_clear */
747 /* Returns: int - number of log bytes cleared. */
748 /* Parameters: softc(I) - pointer to main soft context */
749 /* unit(I) - device we are reading from */
750 /* */
751 /* Deletes all queued up log records for a given output device. */
752 /* ------------------------------------------------------------------------ */
753 int
ipf_log_clear(ipf_main_softc_t * softc,minor_t unit)754 ipf_log_clear(ipf_main_softc_t *softc, minor_t unit)
755 {
756 ipf_log_softc_t *softl = softc->ipf_log_soft;
757 iplog_t *ipl;
758 int used;
759 SPL_INT(s);
760
761 SPL_NET(s);
762 MUTEX_ENTER(&softl->ipl_mutex[unit]);
763 while ((ipl = softl->iplt[unit]) != NULL) {
764 softl->iplt[unit] = ipl->ipl_next;
765 KFREES((caddr_t)ipl, ipl->ipl_dsize);
766 }
767 softl->iplh[unit] = &softl->iplt[unit];
768 softl->ipll[unit] = NULL;
769 used = softl->ipl_used[unit];
770 softl->ipl_used[unit] = 0;
771 bzero((char *)&softl->ipl_crc[unit], FI_CSIZE);
772 MUTEX_EXIT(&softl->ipl_mutex[unit]);
773 SPL_X(s);
774 return (used);
775 }
776
777
778 /* ------------------------------------------------------------------------ */
779 /* Function: ipf_log_canread */
780 /* Returns: int - 0 == no data to read, 1 = data present */
781 /* Parameters: softc(I) - pointer to main soft context */
782 /* unit(I) - device we are reading from */
783 /* */
784 /* Returns an indication of whether or not there is data present in the */
785 /* current buffer for the selected ipf device. */
786 /* ------------------------------------------------------------------------ */
787 int
ipf_log_canread(ipf_main_softc_t * softc,int unit)788 ipf_log_canread(ipf_main_softc_t *softc, int unit)
789 {
790 ipf_log_softc_t *softl = softc->ipf_log_soft;
791
792 return (softl->iplt[unit] != NULL);
793 }
794
795
796 /* ------------------------------------------------------------------------ */
797 /* Function: ipf_log_canread */
798 /* Returns: int - 0 == no data to read, 1 = data present */
799 /* Parameters: softc(I) - pointer to main soft context */
800 /* unit(I) - device we are reading from */
801 /* */
802 /* Returns how many bytes are currently held in log buffers for the */
803 /* selected ipf device. */
804 /* ------------------------------------------------------------------------ */
805 int
ipf_log_bytesused(ipf_main_softc_t * softc,int unit)806 ipf_log_bytesused(ipf_main_softc_t *softc, int unit)
807 {
808 ipf_log_softc_t *softl = softc->ipf_log_soft;
809
810 if (softl == NULL)
811 return (0);
812
813 return (softl->ipl_used[unit]);
814 }
815
816
817 /* ------------------------------------------------------------------------ */
818 /* Function: ipf_log_failures */
819 /* Returns: U_QUAD_T - number of log failures */
820 /* Parameters: softc(I) - pointer to main soft context */
821 /* unit(I) - device we are reading from */
822 /* */
823 /* Returns how many times we've tried to log a packet but failed to do so */
824 /* for the selected ipf device. */
825 /* ------------------------------------------------------------------------ */
826 u_long
ipf_log_failures(ipf_main_softc_t * softc,int unit)827 ipf_log_failures(ipf_main_softc_t *softc, int unit)
828 {
829 ipf_log_softc_t *softl = softc->ipf_log_soft;
830
831 if (softl == NULL)
832 return (0);
833
834 return (softl->ipl_logfail[unit]);
835 }
836
837
838 /* ------------------------------------------------------------------------ */
839 /* Function: ipf_log_logok */
840 /* Returns: U_QUAD_T - number of packets logged */
841 /* Parameters: softc(I) - pointer to main soft context */
842 /* unit(I) - device we are reading from */
843 /* */
844 /* Returns how many times we've successfully logged a packet for the */
845 /* selected ipf device. */
846 /* ------------------------------------------------------------------------ */
847 u_long
ipf_log_logok(ipf_main_softc_t * softc,int unit)848 ipf_log_logok(ipf_main_softc_t *softc, int unit)
849 {
850 ipf_log_softc_t *softl = softc->ipf_log_soft;
851
852 if (softl == NULL)
853 return (0);
854
855 return (softl->ipl_logok[unit]);
856 }
857 #endif /* IPFILTER_LOG */
858