| 1 | /* $NetBSD: ip_log.c,v 1.6 2013/03/28 20:14:18 christos Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (C) 2012 by Darren Reed. |
| 5 | * |
| 6 | * See the IPFILTER.LICENCE file for details on licencing. |
| 7 | * |
| 8 | * Id: ip_log.c,v 1.1.1.2 2012/07/22 13:45:19 darrenr Exp |
| 9 | */ |
| 10 | |
| 11 | #include <sys/cdefs.h> |
| 12 | __KERNEL_RCSID(0, "$NetBSD: ip_log.c,v 1.6 2013/03/28 20:14:18 christos Exp $" ); |
| 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(__FreeBSD__) && !defined(_KERNEL) |
| 22 | # include <osreldate.h> |
| 23 | #endif |
| 24 | #ifndef SOLARIS |
| 25 | # if (defined(sun) && (defined(__svr4__) || defined(__SVR4))) |
| 26 | # define SOLARIS 1 |
| 27 | # else |
| 28 | # define SOLARIS 0 |
| 29 | # endif |
| 30 | #endif |
| 31 | #include <sys/errno.h> |
| 32 | #include <sys/types.h> |
| 33 | #include <sys/file.h> |
| 34 | #ifndef _KERNEL |
| 35 | # include <stdio.h> |
| 36 | # include <string.h> |
| 37 | # include <stdlib.h> |
| 38 | # include <ctype.h> |
| 39 | # define _KERNEL |
| 40 | # define KERNEL |
| 41 | # ifdef __OpenBSD__ |
| 42 | struct file; |
| 43 | # endif |
| 44 | # include <sys/uio.h> |
| 45 | # undef _KERNEL |
| 46 | # undef KERNEL |
| 47 | #endif |
| 48 | #if (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) && \ |
| 49 | defined(_KERNEL) |
| 50 | # include <sys/fcntl.h> |
| 51 | # include <sys/filio.h> |
| 52 | #else |
| 53 | # include <sys/ioctl.h> |
| 54 | #endif |
| 55 | #include <sys/time.h> |
| 56 | #if defined(_KERNEL) |
| 57 | # include <sys/systm.h> |
| 58 | # if (defined(NetBSD) && (__NetBSD_Version__ >= 104000000)) |
| 59 | # include <sys/proc.h> |
| 60 | # endif |
| 61 | #endif /* _KERNEL */ |
| 62 | #if !SOLARIS && !defined(__hpux) && !defined(linux) |
| 63 | # if (defined(NetBSD) && (NetBSD > 199609)) || \ |
| 64 | (defined(OpenBSD) && (OpenBSD > 199603)) || \ |
| 65 | (defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)) |
| 66 | # include <sys/dirent.h> |
| 67 | # else |
| 68 | # include <sys/dir.h> |
| 69 | # endif |
| 70 | # include <sys/mbuf.h> |
| 71 | # include <sys/select.h> |
| 72 | # if __FreeBSD_version >= 500000 |
| 73 | # include <sys/selinfo.h> |
| 74 | # endif |
| 75 | #else |
| 76 | # if !defined(__hpux) && defined(_KERNEL) |
| 77 | # include <sys/filio.h> |
| 78 | # include <sys/cred.h> |
| 79 | # include <sys/ddi.h> |
| 80 | # include <sys/sunddi.h> |
| 81 | # include <sys/ksynch.h> |
| 82 | # include <sys/kmem.h> |
| 83 | # include <sys/mkdev.h> |
| 84 | # include <sys/dditypes.h> |
| 85 | # include <sys/cmn_err.h> |
| 86 | # endif /* !__hpux */ |
| 87 | #endif /* !SOLARIS && !__hpux */ |
| 88 | #if !defined(linux) |
| 89 | # include <sys/protosw.h> |
| 90 | #endif |
| 91 | #include <sys/socket.h> |
| 92 | |
| 93 | #include <net/if.h> |
| 94 | #ifdef sun |
| 95 | # include <net/af.h> |
| 96 | #endif |
| 97 | #if __FreeBSD_version >= 300000 |
| 98 | # include <net/if_var.h> |
| 99 | #endif |
| 100 | #include <netinet/in.h> |
| 101 | #ifdef __sgi |
| 102 | # include <sys/ddi.h> |
| 103 | # ifdef IFF_DRVRLOCK /* IRIX6 */ |
| 104 | # include <sys/hashing.h> |
| 105 | # endif |
| 106 | #endif |
| 107 | #if !defined(__hpux) && !defined(linux) && \ |
| 108 | !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/ |
| 109 | # include <netinet/in_var.h> |
| 110 | #endif |
| 111 | #include <netinet/in_systm.h> |
| 112 | #include <netinet/ip.h> |
| 113 | #include <netinet/tcp.h> |
| 114 | #include <netinet/udp.h> |
| 115 | #include <netinet/ip_icmp.h> |
| 116 | #ifdef USE_INET6 |
| 117 | # include <netinet/icmp6.h> |
| 118 | #endif |
| 119 | #if !defined(linux) |
| 120 | # include <netinet/ip_var.h> |
| 121 | #endif |
| 122 | #ifndef _KERNEL |
| 123 | # include <syslog.h> |
| 124 | #endif |
| 125 | #include "netinet/ip_compat.h" |
| 126 | #include <netinet/tcpip.h> |
| 127 | #include "netinet/ip_fil.h" |
| 128 | #include "netinet/ip_nat.h" |
| 129 | #include "netinet/ip_frag.h" |
| 130 | #include "netinet/ip_state.h" |
| 131 | #include "netinet/ip_auth.h" |
| 132 | #if (__FreeBSD_version >= 300000) || defined(__NetBSD__) |
| 133 | # include <sys/malloc.h> |
| 134 | #endif |
| 135 | /* END OF INCLUDES */ |
| 136 | |
| 137 | #ifdef IPFILTER_LOG |
| 138 | |
| 139 | # if defined(IPL_SELECT) |
| 140 | # include <machine/sys/user.h> |
| 141 | # include <sys/kthread_iface.h> |
| 142 | # define READ_COLLISION 0x001 |
| 143 | extern int selwait; |
| 144 | # endif /* IPL_SELECT */ |
| 145 | |
| 146 | typedef struct ipf_log_softc_s { |
| 147 | ipfmutex_t ipl_mutex[IPL_LOGSIZE]; |
| 148 | # if SOLARIS && defined(_KERNEL) |
| 149 | kcondvar_t ipl_wait[IPL_LOGSIZE]; |
| 150 | # endif |
| 151 | # if defined(linux) && defined(_KERNEL) |
| 152 | wait_queue_head_t iplh_linux[IPL_LOGSIZE]; |
| 153 | # endif |
| 154 | # if defined(__hpux) && defined(_KERNEL) |
| 155 | iplog_select_t ipl_ss[IPL_LOGSIZE]; |
| 156 | # endif |
| 157 | iplog_t **iplh[IPL_LOGSIZE]; |
| 158 | iplog_t *iplt[IPL_LOGSIZE]; |
| 159 | iplog_t *ipll[IPL_LOGSIZE]; |
| 160 | u_long ipl_logfail[IPL_LOGSIZE]; |
| 161 | u_long ipl_logok[IPL_LOGSIZE]; |
| 162 | fr_info_t ipl_crc[IPL_LOGSIZE]; |
| 163 | u_32_t ipl_counter[IPL_LOGSIZE]; |
| 164 | int ipl_suppress; |
| 165 | int ipl_logall; |
| 166 | int ipl_log_init; |
| 167 | int ipl_logsize; |
| 168 | int ipl_used[IPL_LOGSIZE]; |
| 169 | int ipl_magic[IPL_LOGSIZE]; |
| 170 | ipftuneable_t *ipf_log_tune; |
| 171 | int ipl_readers[IPL_LOGSIZE]; |
| 172 | } ipf_log_softc_t; |
| 173 | |
| 174 | static int magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE, |
| 175 | IPL_MAGIC, IPL_MAGIC, IPL_MAGIC, |
| 176 | IPL_MAGIC, IPL_MAGIC }; |
| 177 | |
| 178 | static ipftuneable_t ipf_log_tuneables[] = { |
| 179 | /* log */ |
| 180 | { { (void *)offsetof(ipf_log_softc_t, ipl_suppress) }, |
| 181 | "log_suppress" , 0, 1, |
| 182 | stsizeof(ipf_log_softc_t, ipl_suppress), |
| 183 | 0, NULL, NULL }, |
| 184 | { { (void *)offsetof(ipf_log_softc_t, ipl_logall) }, |
| 185 | "log_all" , 0, 1, |
| 186 | stsizeof(ipf_log_softc_t, ipl_logall), |
| 187 | 0, NULL, NULL }, |
| 188 | { { (void *)offsetof(ipf_log_softc_t, ipl_logsize) }, |
| 189 | "log_size" , 0, 0x80000, |
| 190 | stsizeof(ipf_log_softc_t, ipl_logsize), |
| 191 | 0, NULL, NULL }, |
| 192 | { { NULL }, NULL, 0, 0, |
| 193 | 0, |
| 194 | 0, NULL, NULL } |
| 195 | }; |
| 196 | |
| 197 | |
| 198 | int |
| 199 | ipf_log_main_load(void) |
| 200 | { |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | |
| 205 | int |
| 206 | ipf_log_main_unload(void) |
| 207 | { |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | /* ------------------------------------------------------------------------ */ |
| 212 | /* Function: ipf_log_soft_create */ |
| 213 | /* Returns: void * - NULL = failure, else pointer to log context data */ |
| 214 | /* Parameters: softc(I) - pointer to soft context main structure */ |
| 215 | /* */ |
| 216 | /* Initialise log buffers & pointers. Also iniialised the CRC to a local */ |
| 217 | /* secret for use in calculating the "last log checksum". */ |
| 218 | /* ------------------------------------------------------------------------ */ |
| 219 | void * |
| 220 | ipf_log_soft_create(ipf_main_softc_t *softc) |
| 221 | { |
| 222 | ipf_log_softc_t *softl; |
| 223 | |
| 224 | KMALLOC(softl, ipf_log_softc_t *); |
| 225 | if (softl == NULL) |
| 226 | return NULL; |
| 227 | |
| 228 | bzero((char *)softl, sizeof(*softl)); |
| 229 | bcopy((char *)magic, (char *)softl->ipl_magic, sizeof(magic)); |
| 230 | |
| 231 | softl->ipf_log_tune = ipf_tune_array_copy(softl, |
| 232 | sizeof(ipf_log_tuneables), |
| 233 | ipf_log_tuneables); |
| 234 | if (softl->ipf_log_tune == NULL) { |
| 235 | ipf_log_soft_destroy(softc, softl); |
| 236 | return NULL; |
| 237 | } |
| 238 | if (ipf_tune_array_link(softc, softl->ipf_log_tune) == -1) { |
| 239 | ipf_log_soft_destroy(softc, softl); |
| 240 | return NULL; |
| 241 | } |
| 242 | |
| 243 | softl->ipl_suppress = 1; |
| 244 | softl->ipl_logall = 0; |
| 245 | softl->ipl_log_init = 0; |
| 246 | softl->ipl_logsize = IPFILTER_LOGSIZE; |
| 247 | |
| 248 | return softl; |
| 249 | } |
| 250 | |
| 251 | /* ------------------------------------------------------------------------ */ |
| 252 | /* Function: ipf_log_soft_init */ |
| 253 | /* Returns: int - 0 == success (always returned) */ |
| 254 | /* Parameters: softc(I) - pointer to soft context main structure */ |
| 255 | /* */ |
| 256 | /* Initialise log buffers & pointers. Also iniialised the CRC to a local */ |
| 257 | /* secret for use in calculating the "last log checksum". */ |
| 258 | /* ------------------------------------------------------------------------ */ |
| 259 | int |
| 260 | ipf_log_soft_init(ipf_main_softc_t *softc, void *arg) |
| 261 | { |
| 262 | ipf_log_softc_t *softl = arg; |
| 263 | int i; |
| 264 | |
| 265 | for (i = IPL_LOGMAX; i >= 0; i--) { |
| 266 | softl->iplt[i] = NULL; |
| 267 | softl->ipll[i] = NULL; |
| 268 | softl->iplh[i] = &softl->iplt[i]; |
| 269 | bzero((char *)&softl->ipl_crc[i], sizeof(softl->ipl_crc[i])); |
| 270 | # ifdef IPL_SELECT |
| 271 | softl->iplog_ss[i].read_waiter = 0; |
| 272 | softl->iplog_ss[i].state = 0; |
| 273 | # endif |
| 274 | # if defined(linux) && defined(_KERNEL) |
| 275 | init_waitqueue_head(softl->iplh_linux + i); |
| 276 | # endif |
| 277 | # if SOLARIS && defined(_KERNEL) |
| 278 | cv_init(&softl->ipl_wait[i], NULL, CV_DRIVER, NULL); |
| 279 | # endif |
| 280 | MUTEX_INIT(&softl->ipl_mutex[i], "ipf log mutex" ); |
| 281 | } |
| 282 | |
| 283 | |
| 284 | softl->ipl_log_init = 1; |
| 285 | |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | |
| 290 | /* ------------------------------------------------------------------------ */ |
| 291 | /* Function: ipf_log_soft_fini */ |
| 292 | /* Parameters: softc(I) - pointer to soft context main structure */ |
| 293 | /* arg(I) - pointer to log context structure */ |
| 294 | /* */ |
| 295 | /* Clean up any log data that has accumulated without being read. */ |
| 296 | /* ------------------------------------------------------------------------ */ |
| 297 | int |
| 298 | ipf_log_soft_fini(ipf_main_softc_t *softc, void *arg) |
| 299 | { |
| 300 | ipf_log_softc_t *softl = arg; |
| 301 | int i; |
| 302 | |
| 303 | if (softl->ipl_log_init == 0) |
| 304 | return 0; |
| 305 | |
| 306 | softl->ipl_log_init = 0; |
| 307 | |
| 308 | for (i = IPL_LOGMAX; i >= 0; i--) { |
| 309 | (void) ipf_log_clear(softc, i); |
| 310 | |
| 311 | /* |
| 312 | * This is a busy-wait loop so as to avoid yet another lock |
| 313 | * to wait on. |
| 314 | */ |
| 315 | MUTEX_ENTER(&softl->ipl_mutex[i]); |
| 316 | while (softl->ipl_readers[i] > 0) { |
| 317 | # if SOLARIS && defined(_KERNEL) |
| 318 | cv_broadcast(&softl->ipl_wait[i]); |
| 319 | MUTEX_EXIT(&softl->ipl_mutex[i]); |
| 320 | delay(100); |
| 321 | pollwakeup(&softc->ipf_poll_head[i], POLLRDNORM); |
| 322 | # else |
| 323 | MUTEX_EXIT(&softl->ipl_mutex[i]); |
| 324 | WAKEUP(softl->iplh, i); |
| 325 | POLLWAKEUP(i); |
| 326 | # endif |
| 327 | MUTEX_ENTER(&softl->ipl_mutex[i]); |
| 328 | } |
| 329 | MUTEX_EXIT(&softl->ipl_mutex[i]); |
| 330 | MUTEX_DESTROY(&softl->ipl_mutex[i]); |
| 331 | } |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | |
| 337 | /* ------------------------------------------------------------------------ */ |
| 338 | /* Function: ipf_log_soft_destroy */ |
| 339 | /* Parameters: softc(I) - pointer to soft context main structure */ |
| 340 | /* arg(I) - pointer to log context structure */ |
| 341 | /* */ |
| 342 | /* When this function is called, it is expected that there are no longer */ |
| 343 | /* any threads active in the reading code path or the logging code path. */ |
| 344 | /* ------------------------------------------------------------------------ */ |
| 345 | void |
| 346 | ipf_log_soft_destroy(ipf_main_softc_t *softc, void *arg) |
| 347 | { |
| 348 | ipf_log_softc_t *softl = arg; |
| 349 | int i; |
| 350 | |
| 351 | for (i = IPL_LOGMAX; i >= 0; i--) { |
| 352 | # if SOLARIS && defined(_KERNEL) |
| 353 | cv_destroy(&softl->ipl_wait[i]); |
| 354 | # endif |
| 355 | } |
| 356 | |
| 357 | if (softl->ipf_log_tune != NULL) { |
| 358 | ipf_tune_array_unlink(softc, softl->ipf_log_tune); |
| 359 | KFREES(softl->ipf_log_tune, sizeof(ipf_log_tuneables)); |
| 360 | softl->ipf_log_tune = NULL; |
| 361 | } |
| 362 | |
| 363 | KFREE(softl); |
| 364 | } |
| 365 | |
| 366 | |
| 367 | /* ------------------------------------------------------------------------ */ |
| 368 | /* Function: ipf_log_pkt */ |
| 369 | /* Returns: int - 0 == success, -1 == failure */ |
| 370 | /* Parameters: fin(I) - pointer to packet information */ |
| 371 | /* flags(I) - flags from filter rules */ |
| 372 | /* */ |
| 373 | /* Create a log record for a packet given that it has been triggered by a */ |
| 374 | /* rule (or the default setting). Calculate the transport protocol header */ |
| 375 | /* size using predetermined size of a couple of popular protocols and thus */ |
| 376 | /* how much data to copy into the log, including part of the data body if */ |
| 377 | /* requested. */ |
| 378 | /* ------------------------------------------------------------------------ */ |
| 379 | int |
| 380 | ipf_log_pkt(fr_info_t *fin, u_int flags) |
| 381 | { |
| 382 | ipf_main_softc_t *softc = fin->fin_main_soft; |
| 383 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 384 | register size_t hlen; |
| 385 | int types[2], mlen; |
| 386 | size_t sizes[2]; |
| 387 | void *ptrs[2]; |
| 388 | ipflog_t ipfl; |
| 389 | u_char p; |
| 390 | mb_t *m; |
| 391 | # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) && !defined(FW_HOOKS) |
| 392 | qif_t *ifp; |
| 393 | # else |
| 394 | struct ifnet *ifp; |
| 395 | # endif /* SOLARIS || __hpux */ |
| 396 | |
| 397 | m = fin->fin_m; |
| 398 | if (m == NULL) |
| 399 | return -1; |
| 400 | |
| 401 | ipfl.fl_nattag.ipt_num[0] = 0; |
| 402 | ifp = fin->fin_ifp; |
| 403 | hlen = (char *)fin->fin_dp - (char *)fin->fin_ip; |
| 404 | |
| 405 | /* |
| 406 | * calculate header size. |
| 407 | */ |
| 408 | if (fin->fin_off == 0) { |
| 409 | p = fin->fin_fi.fi_p; |
| 410 | if (p == IPPROTO_TCP) |
| 411 | hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen); |
| 412 | else if (p == IPPROTO_UDP) |
| 413 | hlen += MIN(sizeof(udphdr_t), fin->fin_dlen); |
| 414 | else if (p == IPPROTO_ICMP) { |
| 415 | struct icmp *icmp; |
| 416 | |
| 417 | icmp = (struct icmp *)fin->fin_dp; |
| 418 | |
| 419 | /* |
| 420 | * For ICMP, if the packet is an error packet, also |
| 421 | * include the information about the packet which |
| 422 | * caused the error. |
| 423 | */ |
| 424 | switch (icmp->icmp_type) |
| 425 | { |
| 426 | case ICMP_UNREACH : |
| 427 | case ICMP_SOURCEQUENCH : |
| 428 | case ICMP_REDIRECT : |
| 429 | case ICMP_TIMXCEED : |
| 430 | case ICMP_PARAMPROB : |
| 431 | hlen += MIN(sizeof(struct icmp) + 8, |
| 432 | fin->fin_dlen); |
| 433 | break; |
| 434 | default : |
| 435 | hlen += MIN(sizeof(struct icmp), |
| 436 | fin->fin_dlen); |
| 437 | break; |
| 438 | } |
| 439 | } |
| 440 | # ifdef USE_INET6 |
| 441 | else if (p == IPPROTO_ICMPV6) { |
| 442 | struct icmp6_hdr *icmp; |
| 443 | |
| 444 | icmp = (struct icmp6_hdr *)fin->fin_dp; |
| 445 | |
| 446 | /* |
| 447 | * For ICMPV6, if the packet is an error packet, also |
| 448 | * include the information about the packet which |
| 449 | * caused the error. |
| 450 | */ |
| 451 | if (icmp->icmp6_type < 128) { |
| 452 | hlen += MIN(sizeof(struct icmp6_hdr) + 8, |
| 453 | fin->fin_dlen); |
| 454 | } else { |
| 455 | hlen += MIN(sizeof(struct icmp6_hdr), |
| 456 | fin->fin_dlen); |
| 457 | } |
| 458 | } |
| 459 | # endif |
| 460 | } |
| 461 | /* |
| 462 | * Get the interface number and name to which this packet is |
| 463 | * currently associated. |
| 464 | */ |
| 465 | # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) |
| 466 | # if !defined(FW_HOOKS) |
| 467 | ipfl.fl_unit = (u_int)ifp->qf_ppa; |
| 468 | # endif |
| 469 | COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname); |
| 470 | # else |
| 471 | # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ |
| 472 | OPENBSD_GE_REV(199603) || defined(linux) || FREEBSD_GE_REV(501113) |
| 473 | COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname); |
| 474 | # else |
| 475 | ipfl.fl_unit = (u_int)ifp->if_unit; |
| 476 | # if defined(_KERNEL) |
| 477 | if ((ipfl.fl_ifname[0] = ifp->if_name[0])) |
| 478 | if ((ipfl.fl_ifname[1] = ifp->if_name[1])) |
| 479 | if ((ipfl.fl_ifname[2] = ifp->if_name[2])) |
| 480 | ipfl.fl_ifname[3] = ifp->if_name[3]; |
| 481 | # else |
| 482 | (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); |
| 483 | ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0'; |
| 484 | # endif |
| 485 | # endif |
| 486 | # endif /* __hpux || SOLARIS */ |
| 487 | mlen = fin->fin_plen - hlen; |
| 488 | if (!softl->ipl_logall) { |
| 489 | mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0; |
| 490 | } else if ((flags & FR_LOGBODY) == 0) { |
| 491 | mlen = 0; |
| 492 | } |
| 493 | if (mlen < 0) |
| 494 | mlen = 0; |
| 495 | ipfl.fl_plen = (u_char)mlen; |
| 496 | ipfl.fl_hlen = (u_char)hlen; |
| 497 | ipfl.fl_rule = fin->fin_rule; |
| 498 | (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN); |
| 499 | if (fin->fin_fr != NULL) { |
| 500 | ipfl.fl_loglevel = fin->fin_fr->fr_loglevel; |
| 501 | ipfl.fl_logtag = fin->fin_fr->fr_logtag; |
| 502 | } else { |
| 503 | ipfl.fl_loglevel = 0xffff; |
| 504 | ipfl.fl_logtag = FR_NOLOGTAG; |
| 505 | } |
| 506 | if (fin->fin_nattag != NULL) |
| 507 | bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag, |
| 508 | sizeof(ipfl.fl_nattag)); |
| 509 | ipfl.fl_flags = flags; |
| 510 | ipfl.fl_breason = (fin->fin_reason & 0xff); |
| 511 | ipfl.fl_dir = fin->fin_out; |
| 512 | ipfl.fl_lflags = fin->fin_flx; |
| 513 | ipfl.fl_family = fin->fin_family; |
| 514 | ptrs[0] = (void *)&ipfl; |
| 515 | sizes[0] = sizeof(ipfl); |
| 516 | types[0] = 0; |
| 517 | # if defined(MENTAT) && defined(_KERNEL) |
| 518 | /* |
| 519 | * Are we copied from the mblk or an aligned array ? |
| 520 | */ |
| 521 | if (fin->fin_ip == (ip_t *)m->b_rptr) { |
| 522 | ptrs[1] = m; |
| 523 | sizes[1] = hlen + mlen; |
| 524 | types[1] = 1; |
| 525 | } else { |
| 526 | ptrs[1] = fin->fin_ip; |
| 527 | sizes[1] = hlen + mlen; |
| 528 | types[1] = 0; |
| 529 | } |
| 530 | # else |
| 531 | ptrs[1] = m; |
| 532 | sizes[1] = hlen + mlen; |
| 533 | types[1] = 1; |
| 534 | # endif /* MENTAT */ |
| 535 | return ipf_log_items(softc, IPL_LOGIPF, fin, ptrs, sizes, types, 2); |
| 536 | } |
| 537 | |
| 538 | |
| 539 | /* ------------------------------------------------------------------------ */ |
| 540 | /* Function: ipf_log_items */ |
| 541 | /* Returns: int - 0 == success, -1 == failure */ |
| 542 | /* Parameters: softc(I) - pointer to main soft context */ |
| 543 | /* unit(I) - device we are reading from */ |
| 544 | /* fin(I) - pointer to packet information */ |
| 545 | /* items(I) - array of pointers to log data */ |
| 546 | /* itemsz(I) - array of size of valid memory pointed to */ |
| 547 | /* types(I) - type of data pointed to by items pointers */ |
| 548 | /* cnt(I) - number of elements in arrays items/itemsz/types */ |
| 549 | /* */ |
| 550 | /* Takes an array of parameters and constructs one record to include the */ |
| 551 | /* miscellaneous packet information, as well as packet data, for reading */ |
| 552 | /* from the log device. */ |
| 553 | /* ------------------------------------------------------------------------ */ |
| 554 | int |
| 555 | ipf_log_items(ipf_main_softc_t *softc, int unit, fr_info_t *fin, |
| 556 | void **items, size_t *itemsz, int *types, int cnt) |
| 557 | { |
| 558 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 559 | char *buf, *ptr; |
| 560 | iplog_t *ipl; |
| 561 | size_t len; |
| 562 | int i; |
| 563 | SPL_INT(s); |
| 564 | |
| 565 | /* |
| 566 | * Get the total amount of data to be logged. |
| 567 | */ |
| 568 | for (i = 0, len = sizeof(iplog_t); i < cnt; i++) |
| 569 | len += itemsz[i]; |
| 570 | |
| 571 | SPL_NET(s); |
| 572 | MUTEX_ENTER(&softl->ipl_mutex[unit]); |
| 573 | softl->ipl_counter[unit]++; |
| 574 | /* |
| 575 | * check that we have space to record this information and can |
| 576 | * allocate that much. |
| 577 | */ |
| 578 | if ((softl->ipl_used[unit] + len) > softl->ipl_logsize) { |
| 579 | softl->ipl_logfail[unit]++; |
| 580 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 581 | return -1; |
| 582 | } |
| 583 | |
| 584 | KMALLOCS(buf, char *, len); |
| 585 | if (buf == NULL) { |
| 586 | softl->ipl_logfail[unit]++; |
| 587 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 588 | return -1; |
| 589 | } |
| 590 | ipl = (iplog_t *)buf; |
| 591 | ipl->ipl_magic = softl->ipl_magic[unit]; |
| 592 | ipl->ipl_count = 1; |
| 593 | ipl->ipl_seqnum = softl->ipl_counter[unit]; |
| 594 | ipl->ipl_next = NULL; |
| 595 | ipl->ipl_dsize = len; |
| 596 | #ifdef _KERNEL |
| 597 | GETKTIME(&ipl->ipl_sec); |
| 598 | #else |
| 599 | ipl->ipl_sec = 0; |
| 600 | ipl->ipl_usec = 0; |
| 601 | #endif |
| 602 | |
| 603 | /* |
| 604 | * Loop through all the items to be logged, copying each one to the |
| 605 | * buffer. Use bcopy for normal data or the mb_t copyout routine. |
| 606 | */ |
| 607 | for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) { |
| 608 | if (types[i] == 0) { |
| 609 | memcpy(ptr, items[i], itemsz[i]); |
| 610 | } else if (types[i] == 1) { |
| 611 | COPYDATA(items[i], 0, itemsz[i], ptr); |
| 612 | } |
| 613 | ptr += itemsz[i]; |
| 614 | } |
| 615 | /* |
| 616 | * Check to see if this log record has a CRC which matches the last |
| 617 | * record logged. If it does, just up the count on the previous one |
| 618 | * rather than create a new one. |
| 619 | */ |
| 620 | if (softl->ipl_suppress) { |
| 621 | if ((fin != NULL) && (fin->fin_off == 0)) { |
| 622 | if ((softl->ipll[unit] != NULL) && |
| 623 | (fin->fin_crc == softl->ipl_crc[unit].fin_crc) && |
| 624 | bcmp((char *)fin, (char *)&softl->ipl_crc[unit], |
| 625 | FI_LCSIZE) == 0) { |
| 626 | softl->ipll[unit]->ipl_count++; |
| 627 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 628 | SPL_X(s); |
| 629 | KFREES(buf, len); |
| 630 | return 0; |
| 631 | } |
| 632 | bcopy((char *)fin, (char *)&softl->ipl_crc[unit], |
| 633 | FI_LCSIZE); |
| 634 | softl->ipl_crc[unit].fin_crc = fin->fin_crc; |
| 635 | } else |
| 636 | bzero((char *)&softl->ipl_crc[unit], FI_CSIZE); |
| 637 | } |
| 638 | |
| 639 | /* |
| 640 | * advance the log pointer to the next empty record and deduct the |
| 641 | * amount of space we're going to use. |
| 642 | */ |
| 643 | softl->ipl_logok[unit]++; |
| 644 | softl->ipll[unit] = ipl; |
| 645 | *softl->iplh[unit] = ipl; |
| 646 | softl->iplh[unit] = &ipl->ipl_next; |
| 647 | softl->ipl_used[unit] += len; |
| 648 | |
| 649 | /* |
| 650 | * Now that the log record has been completed and added to the queue, |
| 651 | * wake up any listeners who may want to read it. |
| 652 | */ |
| 653 | # if SOLARIS && defined(_KERNEL) |
| 654 | cv_signal(&softl->ipl_wait[unit]); |
| 655 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 656 | pollwakeup(&softc->ipf_poll_head[unit], POLLRDNORM); |
| 657 | # else |
| 658 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 659 | WAKEUP(softl->iplh, unit); |
| 660 | POLLWAKEUP(unit); |
| 661 | # endif |
| 662 | SPL_X(s); |
| 663 | # ifdef IPL_SELECT |
| 664 | iplog_input_ready(unit); |
| 665 | # endif |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | |
| 670 | /* ------------------------------------------------------------------------ */ |
| 671 | /* Function: ipf_log_read */ |
| 672 | /* Returns: int - 0 == success, else error value. */ |
| 673 | /* Parameters: softc(I) - pointer to main soft context */ |
| 674 | /* unit(I) - device we are reading from */ |
| 675 | /* uio(O) - pointer to information about where to store data */ |
| 676 | /* */ |
| 677 | /* Called to handle a read on an IPFilter device. Returns only complete */ |
| 678 | /* log messages - will not partially copy a log record out to userland. */ |
| 679 | /* */ |
| 680 | /* NOTE: This function will block and wait for a signal to return data if */ |
| 681 | /* there is none present. Asynchronous I/O is not implemented. */ |
| 682 | /* ------------------------------------------------------------------------ */ |
| 683 | int |
| 684 | ipf_log_read(ipf_main_softc_t *softc, minor_t unit, struct uio *uio) |
| 685 | { |
| 686 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 687 | size_t dlen, copied; |
| 688 | int error = 0; |
| 689 | iplog_t *ipl; |
| 690 | SPL_INT(s); |
| 691 | |
| 692 | if (softl->ipl_log_init == 0) { |
| 693 | IPFERROR(40007); |
| 694 | return 0; |
| 695 | } |
| 696 | |
| 697 | /* |
| 698 | * Sanity checks. Make sure the minor # is valid and we're copying |
| 699 | * a valid chunk of data. |
| 700 | */ |
| 701 | if (IPL_LOGMAX < unit) { |
| 702 | IPFERROR(40001); |
| 703 | return ENXIO; |
| 704 | } |
| 705 | if (uio->uio_resid == 0) |
| 706 | return 0; |
| 707 | |
| 708 | if (uio->uio_resid < sizeof(iplog_t)) { |
| 709 | IPFERROR(40002); |
| 710 | return EINVAL; |
| 711 | } |
| 712 | if (uio->uio_resid > softl->ipl_logsize) { |
| 713 | IPFERROR(40005); |
| 714 | return EINVAL; |
| 715 | } |
| 716 | |
| 717 | /* |
| 718 | * Lock the log so we can snapshot the variables. Wait for a signal |
| 719 | * if the log is empty. |
| 720 | */ |
| 721 | SPL_NET(s); |
| 722 | MUTEX_ENTER(&softl->ipl_mutex[unit]); |
| 723 | softl->ipl_readers[unit]++; |
| 724 | |
| 725 | while (softl->ipl_log_init == 1 && softl->iplt[unit] == NULL) { |
| 726 | # if SOLARIS && defined(_KERNEL) |
| 727 | if (!cv_wait_sig(&softl->ipl_wait[unit], |
| 728 | &softl->ipl_mutex[unit].ipf_lk)) { |
| 729 | softl->ipl_readers[unit]--; |
| 730 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 731 | IPFERROR(40003); |
| 732 | return EINTR; |
| 733 | } |
| 734 | # else |
| 735 | # if defined(__hpux) && defined(_KERNEL) |
| 736 | lock_t *l; |
| 737 | |
| 738 | # ifdef IPL_SELECT |
| 739 | if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) { |
| 740 | /* this is no blocking system call */ |
| 741 | softl->ipl_readers[unit]--; |
| 742 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 743 | return 0; |
| 744 | } |
| 745 | # endif |
| 746 | |
| 747 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 748 | l = get_sleep_lock(&softl->iplh[unit]); |
| 749 | error = sleep(&softl->iplh[unit], PZERO+1); |
| 750 | spinunlock(l); |
| 751 | # else |
| 752 | # if defined(__osf__) && defined(_KERNEL) |
| 753 | error = mpsleep(&softl->iplh[unit], PSUSP|PCATCH, "ipfread" , 0, |
| 754 | &softl->ipl_mutex, MS_LOCK_SIMPLE); |
| 755 | # else |
| 756 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 757 | SPL_X(s); |
| 758 | error = SLEEP(unit + softl->iplh, "ipl sleep" ); |
| 759 | # endif /* __osf__ */ |
| 760 | # endif /* __hpux */ |
| 761 | SPL_NET(s); |
| 762 | MUTEX_ENTER(&softl->ipl_mutex[unit]); |
| 763 | if (error) { |
| 764 | softl->ipl_readers[unit]--; |
| 765 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 766 | IPFERROR(40004); |
| 767 | return error; |
| 768 | } |
| 769 | # endif /* SOLARIS */ |
| 770 | } |
| 771 | if (softl->ipl_log_init != 1) { |
| 772 | softl->ipl_readers[unit]--; |
| 773 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 774 | IPFERROR(40008); |
| 775 | return EIO; |
| 776 | } |
| 777 | |
| 778 | # if (defined(BSD) && (BSD >= 199101)) || defined(__FreeBSD__) || \ |
| 779 | defined(__osf__) |
| 780 | uio->uio_rw = UIO_READ; |
| 781 | # endif |
| 782 | |
| 783 | for (copied = 0; (ipl = softl->iplt[unit]) != NULL; copied += dlen) { |
| 784 | dlen = ipl->ipl_dsize; |
| 785 | if (dlen > uio->uio_resid) |
| 786 | break; |
| 787 | /* |
| 788 | * Don't hold the mutex over the uiomove call. |
| 789 | */ |
| 790 | softl->iplt[unit] = ipl->ipl_next; |
| 791 | softl->ipl_used[unit] -= dlen; |
| 792 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 793 | SPL_X(s); |
| 794 | error = UIOMOVE((void *)ipl, dlen, UIO_READ, uio); |
| 795 | if (error) { |
| 796 | SPL_NET(s); |
| 797 | MUTEX_ENTER(&softl->ipl_mutex[unit]); |
| 798 | IPFERROR(40006); |
| 799 | ipl->ipl_next = softl->iplt[unit]; |
| 800 | softl->iplt[unit] = ipl; |
| 801 | softl->ipl_used[unit] += dlen; |
| 802 | break; |
| 803 | } |
| 804 | MUTEX_ENTER(&softl->ipl_mutex[unit]); |
| 805 | KFREES((void *)ipl, dlen); |
| 806 | SPL_NET(s); |
| 807 | } |
| 808 | if (!softl->iplt[unit]) { |
| 809 | softl->ipl_used[unit] = 0; |
| 810 | softl->iplh[unit] = &softl->iplt[unit]; |
| 811 | softl->ipll[unit] = NULL; |
| 812 | } |
| 813 | |
| 814 | softl->ipl_readers[unit]--; |
| 815 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 816 | SPL_X(s); |
| 817 | return error; |
| 818 | } |
| 819 | |
| 820 | |
| 821 | /* ------------------------------------------------------------------------ */ |
| 822 | /* Function: ipf_log_clear */ |
| 823 | /* Returns: int - number of log bytes cleared. */ |
| 824 | /* Parameters: softc(I) - pointer to main soft context */ |
| 825 | /* unit(I) - device we are reading from */ |
| 826 | /* */ |
| 827 | /* Deletes all queued up log records for a given output device. */ |
| 828 | /* ------------------------------------------------------------------------ */ |
| 829 | int |
| 830 | ipf_log_clear(ipf_main_softc_t *softc, minor_t unit) |
| 831 | { |
| 832 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 833 | iplog_t *ipl; |
| 834 | int used; |
| 835 | SPL_INT(s); |
| 836 | |
| 837 | SPL_NET(s); |
| 838 | MUTEX_ENTER(&softl->ipl_mutex[unit]); |
| 839 | while ((ipl = softl->iplt[unit]) != NULL) { |
| 840 | softl->iplt[unit] = ipl->ipl_next; |
| 841 | KFREES((void *)ipl, ipl->ipl_dsize); |
| 842 | } |
| 843 | softl->iplh[unit] = &softl->iplt[unit]; |
| 844 | softl->ipll[unit] = NULL; |
| 845 | used = softl->ipl_used[unit]; |
| 846 | softl->ipl_used[unit] = 0; |
| 847 | bzero((char *)&softl->ipl_crc[unit], FI_CSIZE); |
| 848 | MUTEX_EXIT(&softl->ipl_mutex[unit]); |
| 849 | SPL_X(s); |
| 850 | return used; |
| 851 | } |
| 852 | |
| 853 | |
| 854 | /* ------------------------------------------------------------------------ */ |
| 855 | /* Function: ipf_log_canread */ |
| 856 | /* Returns: int - 0 == no data to read, 1 = data present */ |
| 857 | /* Parameters: softc(I) - pointer to main soft context */ |
| 858 | /* unit(I) - device we are reading from */ |
| 859 | /* */ |
| 860 | /* Returns an indication of whether or not there is data present in the */ |
| 861 | /* current buffer for the selected ipf device. */ |
| 862 | /* ------------------------------------------------------------------------ */ |
| 863 | int |
| 864 | ipf_log_canread(ipf_main_softc_t *softc, int unit) |
| 865 | { |
| 866 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 867 | |
| 868 | return softl->iplt[unit] != NULL; |
| 869 | } |
| 870 | |
| 871 | |
| 872 | /* ------------------------------------------------------------------------ */ |
| 873 | /* Function: ipf_log_canread */ |
| 874 | /* Returns: int - 0 == no data to read, 1 = data present */ |
| 875 | /* Parameters: softc(I) - pointer to main soft context */ |
| 876 | /* unit(I) - device we are reading from */ |
| 877 | /* */ |
| 878 | /* Returns how many bytes are currently held in log buffers for the */ |
| 879 | /* selected ipf device. */ |
| 880 | /* ------------------------------------------------------------------------ */ |
| 881 | int |
| 882 | ipf_log_bytesused(ipf_main_softc_t *softc, int unit) |
| 883 | { |
| 884 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 885 | |
| 886 | if (softl == NULL) |
| 887 | return 0; |
| 888 | |
| 889 | return softl->ipl_used[unit]; |
| 890 | } |
| 891 | |
| 892 | |
| 893 | /* ------------------------------------------------------------------------ */ |
| 894 | /* Function: ipf_log_failures */ |
| 895 | /* Returns: U_QUAD_T - number of log failures */ |
| 896 | /* Parameters: softc(I) - pointer to main soft context */ |
| 897 | /* unit(I) - device we are reading from */ |
| 898 | /* */ |
| 899 | /* Returns how many times we've tried to log a packet but failed to do so */ |
| 900 | /* for the selected ipf device. */ |
| 901 | /* ------------------------------------------------------------------------ */ |
| 902 | u_long |
| 903 | ipf_log_failures(ipf_main_softc_t *softc, int unit) |
| 904 | { |
| 905 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 906 | |
| 907 | if (softl == NULL) |
| 908 | return 0; |
| 909 | |
| 910 | return softl->ipl_logfail[unit]; |
| 911 | } |
| 912 | |
| 913 | |
| 914 | /* ------------------------------------------------------------------------ */ |
| 915 | /* Function: ipf_log_logok */ |
| 916 | /* Returns: U_QUAD_T - number of packets logged */ |
| 917 | /* Parameters: softc(I) - pointer to main soft context */ |
| 918 | /* unit(I) - device we are reading from */ |
| 919 | /* */ |
| 920 | /* Returns how many times we've successfully logged a packet for the */ |
| 921 | /* selected ipf device. */ |
| 922 | /* ------------------------------------------------------------------------ */ |
| 923 | u_long |
| 924 | ipf_log_logok(ipf_main_softc_t *softc, int unit) |
| 925 | { |
| 926 | ipf_log_softc_t *softl = softc->ipf_log_soft; |
| 927 | |
| 928 | if (softl == NULL) |
| 929 | return 0; |
| 930 | |
| 931 | return softl->ipl_logok[unit]; |
| 932 | } |
| 933 | #endif /* IPFILTER_LOG */ |
| 934 | |