/* $NetBSD: ip_log.c,v 1.8 2018/06/03 10:37:23 maxv Exp $ */ /* * Copyright (C) 2012 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. * * Id: ip_log.c,v 1.1.1.2 2012/07/22 13:45:19 darrenr Exp */ #include __KERNEL_RCSID(0, "$NetBSD: ip_log.c,v 1.8 2018/06/03 10:37:23 maxv Exp $"); #include #if defined(KERNEL) || defined(_KERNEL) # undef KERNEL # undef _KERNEL # define KERNEL 1 # define _KERNEL 1 #endif #if defined(__FreeBSD__) && !defined(_KERNEL) # include #endif #ifndef SOLARIS # if (defined(sun) && (defined(__svr4__) || defined(__SVR4))) # define SOLARIS 1 # else # define SOLARIS 0 # endif #endif #include #include #include #ifndef _KERNEL # include # include # include # include # define _KERNEL # define KERNEL # ifdef __OpenBSD__ struct file; # endif # include # undef _KERNEL # undef KERNEL #endif #if (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) && \ defined(_KERNEL) # include # include #else # include #endif #include #if defined(_KERNEL) # include # if (defined(NetBSD) && (__NetBSD_Version__ >= 104000000)) # include # endif #endif /* _KERNEL */ #if !SOLARIS && !defined(__hpux) && !defined(linux) # if (defined(NetBSD) && (NetBSD > 199609)) || \ (defined(OpenBSD) && (OpenBSD > 199603)) || \ (defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)) # include # else # include # endif # include # include # if __FreeBSD_version >= 500000 # include # endif #else # if !defined(__hpux) && defined(_KERNEL) # include # include # include # include # include # include # include # include # include # endif /* !__hpux */ #endif /* !SOLARIS && !__hpux */ #if !defined(linux) # include #endif #include #include #ifdef sun # include #endif #if __FreeBSD_version >= 300000 # include #endif #include #ifdef __sgi # include # ifdef IFF_DRVRLOCK /* IRIX6 */ # include # endif #endif #if !defined(__hpux) && !defined(linux) && \ !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/ # include #endif #include #include #include #include #include #ifdef USE_INET6 # include #endif #if !defined(linux) # include #endif #ifndef _KERNEL # include #endif #include "netinet/ip_compat.h" #include "netinet/ip_fil.h" #include "netinet/ip_nat.h" #include "netinet/ip_frag.h" #include "netinet/ip_state.h" #include "netinet/ip_auth.h" #if (__FreeBSD_version >= 300000) || defined(__NetBSD__) # include #endif /* END OF INCLUDES */ #ifdef IPFILTER_LOG # if defined(IPL_SELECT) # include # include # define READ_COLLISION 0x001 extern int selwait; # endif /* IPL_SELECT */ typedef struct ipf_log_softc_s { ipfmutex_t ipl_mutex[IPL_LOGSIZE]; # if SOLARIS && defined(_KERNEL) kcondvar_t ipl_wait[IPL_LOGSIZE]; # endif # if defined(linux) && defined(_KERNEL) wait_queue_head_t iplh_linux[IPL_LOGSIZE]; # endif # if defined(__hpux) && defined(_KERNEL) iplog_select_t ipl_ss[IPL_LOGSIZE]; # endif iplog_t **iplh[IPL_LOGSIZE]; iplog_t *iplt[IPL_LOGSIZE]; iplog_t *ipll[IPL_LOGSIZE]; u_long ipl_logfail[IPL_LOGSIZE]; u_long ipl_logok[IPL_LOGSIZE]; fr_info_t ipl_crc[IPL_LOGSIZE]; u_32_t ipl_counter[IPL_LOGSIZE]; int ipl_suppress; int ipl_logall; int ipl_log_init; int ipl_logsize; int ipl_used[IPL_LOGSIZE]; int ipl_magic[IPL_LOGSIZE]; ipftuneable_t *ipf_log_tune; int ipl_readers[IPL_LOGSIZE]; } ipf_log_softc_t; static int magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE, IPL_MAGIC, IPL_MAGIC, IPL_MAGIC, IPL_MAGIC, IPL_MAGIC }; static const ipftuneable_t ipf_log_tuneables[] = { /* log */ { { (void *)offsetof(ipf_log_softc_t, ipl_suppress) }, "log_suppress", 0, 1, stsizeof(ipf_log_softc_t, ipl_suppress), 0, NULL, NULL }, { { (void *)offsetof(ipf_log_softc_t, ipl_logall) }, "log_all", 0, 1, stsizeof(ipf_log_softc_t, ipl_logall), 0, NULL, NULL }, { { (void *)offsetof(ipf_log_softc_t, ipl_logsize) }, "log_size", 0, 0x80000, stsizeof(ipf_log_softc_t, ipl_logsize), 0, NULL, NULL }, { { NULL }, NULL, 0, 0, 0, 0, NULL, NULL } }; int ipf_log_main_load(void) { return 0; } int ipf_log_main_unload(void) { return 0; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_soft_create */ /* Returns: void * - NULL = failure, else pointer to log context data */ /* Parameters: softc(I) - pointer to soft context main structure */ /* */ /* Initialise log buffers & pointers. Also iniialised the CRC to a local */ /* secret for use in calculating the "last log checksum". */ /* ------------------------------------------------------------------------ */ void * ipf_log_soft_create(ipf_main_softc_t *softc) { ipf_log_softc_t *softl; KMALLOC(softl, ipf_log_softc_t *); if (softl == NULL) return NULL; bzero((char *)softl, sizeof(*softl)); bcopy((char *)magic, (char *)softl->ipl_magic, sizeof(magic)); softl->ipf_log_tune = ipf_tune_array_copy(softl, sizeof(ipf_log_tuneables), ipf_log_tuneables); if (softl->ipf_log_tune == NULL) { ipf_log_soft_destroy(softc, softl); return NULL; } if (ipf_tune_array_link(softc, softl->ipf_log_tune) == -1) { ipf_log_soft_destroy(softc, softl); return NULL; } softl->ipl_suppress = 1; softl->ipl_logall = 0; softl->ipl_log_init = 0; softl->ipl_logsize = IPFILTER_LOGSIZE; return softl; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_soft_init */ /* Returns: int - 0 == success (always returned) */ /* Parameters: softc(I) - pointer to soft context main structure */ /* */ /* Initialise log buffers & pointers. Also iniialised the CRC to a local */ /* secret for use in calculating the "last log checksum". */ /* ------------------------------------------------------------------------ */ int ipf_log_soft_init(ipf_main_softc_t *softc, void *arg) { ipf_log_softc_t *softl = arg; int i; for (i = IPL_LOGMAX; i >= 0; i--) { softl->iplt[i] = NULL; softl->ipll[i] = NULL; softl->iplh[i] = &softl->iplt[i]; bzero((char *)&softl->ipl_crc[i], sizeof(softl->ipl_crc[i])); # ifdef IPL_SELECT softl->iplog_ss[i].read_waiter = 0; softl->iplog_ss[i].state = 0; # endif # if defined(linux) && defined(_KERNEL) init_waitqueue_head(softl->iplh_linux + i); # endif # if SOLARIS && defined(_KERNEL) cv_init(&softl->ipl_wait[i], NULL, CV_DRIVER, NULL); # endif MUTEX_INIT(&softl->ipl_mutex[i], "ipf log mutex"); } softl->ipl_log_init = 1; return 0; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_soft_fini */ /* Parameters: softc(I) - pointer to soft context main structure */ /* arg(I) - pointer to log context structure */ /* */ /* Clean up any log data that has accumulated without being read. */ /* ------------------------------------------------------------------------ */ int ipf_log_soft_fini(ipf_main_softc_t *softc, void *arg) { ipf_log_softc_t *softl = arg; int i; if (softl->ipl_log_init == 0) return 0; softl->ipl_log_init = 0; for (i = IPL_LOGMAX; i >= 0; i--) { (void) ipf_log_clear(softc, i); /* * This is a busy-wait loop so as to avoid yet another lock * to wait on. */ MUTEX_ENTER(&softl->ipl_mutex[i]); while (softl->ipl_readers[i] > 0) { # if SOLARIS && defined(_KERNEL) cv_broadcast(&softl->ipl_wait[i]); MUTEX_EXIT(&softl->ipl_mutex[i]); delay(100); pollwakeup(&softc->ipf_poll_head[i], POLLRDNORM); # else MUTEX_EXIT(&softl->ipl_mutex[i]); WAKEUP(softl->iplh, i); POLLWAKEUP(i); # endif MUTEX_ENTER(&softl->ipl_mutex[i]); } MUTEX_EXIT(&softl->ipl_mutex[i]); MUTEX_DESTROY(&softl->ipl_mutex[i]); } return 0; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_soft_destroy */ /* Parameters: softc(I) - pointer to soft context main structure */ /* arg(I) - pointer to log context structure */ /* */ /* When this function is called, it is expected that there are no longer */ /* any threads active in the reading code path or the logging code path. */ /* ------------------------------------------------------------------------ */ void ipf_log_soft_destroy(ipf_main_softc_t *softc, void *arg) { ipf_log_softc_t *softl = arg; int i; for (i = IPL_LOGMAX; i >= 0; i--) { # if SOLARIS && defined(_KERNEL) cv_destroy(&softl->ipl_wait[i]); # endif } if (softl->ipf_log_tune != NULL) { ipf_tune_array_unlink(softc, softl->ipf_log_tune); KFREES(softl->ipf_log_tune, sizeof(ipf_log_tuneables)); softl->ipf_log_tune = NULL; } KFREE(softl); } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_pkt */ /* Returns: int - 0 == success, -1 == failure */ /* Parameters: fin(I) - pointer to packet information */ /* flags(I) - flags from filter rules */ /* */ /* Create a log record for a packet given that it has been triggered by a */ /* rule (or the default setting). Calculate the transport protocol header */ /* size using predetermined size of a couple of popular protocols and thus */ /* how much data to copy into the log, including part of the data body if */ /* requested. */ /* ------------------------------------------------------------------------ */ int ipf_log_pkt(fr_info_t *fin, u_int flags) { ipf_main_softc_t *softc = fin->fin_main_soft; ipf_log_softc_t *softl = softc->ipf_log_soft; register size_t hlen; int types[2], mlen; size_t sizes[2]; void *ptrs[2]; ipflog_t ipfl; u_char p; mb_t *m; # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) && !defined(FW_HOOKS) qif_t *ifp; # else struct ifnet *ifp; # endif /* SOLARIS || __hpux */ m = fin->fin_m; if (m == NULL) return -1; ipfl.fl_nattag.ipt_num[0] = 0; ifp = fin->fin_ifp; hlen = (char *)fin->fin_dp - (char *)fin->fin_ip; /* * calculate header size. */ if (fin->fin_off == 0) { p = fin->fin_fi.fi_p; if (p == IPPROTO_TCP) hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen); else if (p == IPPROTO_UDP) hlen += MIN(sizeof(udphdr_t), fin->fin_dlen); else if (p == IPPROTO_ICMP) { struct icmp *icmp; icmp = (struct icmp *)fin->fin_dp; /* * For ICMP, if the packet is an error packet, also * include the information about the packet which * caused the error. */ switch (icmp->icmp_type) { case ICMP_UNREACH : case ICMP_SOURCEQUENCH : case ICMP_REDIRECT : case ICMP_TIMXCEED : case ICMP_PARAMPROB : hlen += MIN(sizeof(struct icmp) + 8, fin->fin_dlen); break; default : hlen += MIN(sizeof(struct icmp), fin->fin_dlen); break; } } # ifdef USE_INET6 else if (p == IPPROTO_ICMPV6) { struct icmp6_hdr *icmp; icmp = (struct icmp6_hdr *)fin->fin_dp; /* * For ICMPV6, if the packet is an error packet, also * include the information about the packet which * caused the error. */ if (icmp->icmp6_type < 128) { hlen += MIN(sizeof(struct icmp6_hdr) + 8, fin->fin_dlen); } else { hlen += MIN(sizeof(struct icmp6_hdr), fin->fin_dlen); } } # endif } /* * Get the interface number and name to which this packet is * currently associated. */ # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) # if !defined(FW_HOOKS) ipfl.fl_unit = (u_int)ifp->qf_ppa; # endif COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname); # else # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ OPENBSD_GE_REV(199603) || defined(linux) || FREEBSD_GE_REV(501113) COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname); # else ipfl.fl_unit = (u_int)ifp->if_unit; # if defined(_KERNEL) if ((ipfl.fl_ifname[0] = ifp->if_name[0])) if ((ipfl.fl_ifname[1] = ifp->if_name[1])) if ((ipfl.fl_ifname[2] = ifp->if_name[2])) ipfl.fl_ifname[3] = ifp->if_name[3]; # else (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0'; # endif # endif # endif /* __hpux || SOLARIS */ mlen = fin->fin_plen - hlen; if (!softl->ipl_logall) { mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0; } else if ((flags & FR_LOGBODY) == 0) { mlen = 0; } if (mlen < 0) mlen = 0; ipfl.fl_plen = (u_char)mlen; ipfl.fl_hlen = (u_char)hlen; ipfl.fl_rule = fin->fin_rule; (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN); if (fin->fin_fr != NULL) { ipfl.fl_loglevel = fin->fin_fr->fr_loglevel; ipfl.fl_logtag = fin->fin_fr->fr_logtag; } else { ipfl.fl_loglevel = 0xffff; ipfl.fl_logtag = FR_NOLOGTAG; } if (fin->fin_nattag != NULL) bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag, sizeof(ipfl.fl_nattag)); ipfl.fl_flags = flags; ipfl.fl_breason = (fin->fin_reason & 0xff); ipfl.fl_dir = fin->fin_out; ipfl.fl_lflags = fin->fin_flx; ipfl.fl_family = fin->fin_family; ptrs[0] = (void *)&ipfl; sizes[0] = sizeof(ipfl); types[0] = 0; # if defined(MENTAT) && defined(_KERNEL) /* * Are we copied from the mblk or an aligned array ? */ if (fin->fin_ip == (ip_t *)m->b_rptr) { ptrs[1] = m; sizes[1] = hlen + mlen; types[1] = 1; } else { ptrs[1] = fin->fin_ip; sizes[1] = hlen + mlen; types[1] = 0; } # else ptrs[1] = m; sizes[1] = hlen + mlen; types[1] = 1; # endif /* MENTAT */ return ipf_log_items(softc, IPL_LOGIPF, fin, ptrs, sizes, types, 2); } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_items */ /* Returns: int - 0 == success, -1 == failure */ /* Parameters: softc(I) - pointer to main soft context */ /* unit(I) - device we are reading from */ /* fin(I) - pointer to packet information */ /* items(I) - array of pointers to log data */ /* itemsz(I) - array of size of valid memory pointed to */ /* types(I) - type of data pointed to by items pointers */ /* cnt(I) - number of elements in arrays items/itemsz/types */ /* */ /* Takes an array of parameters and constructs one record to include the */ /* miscellaneous packet information, as well as packet data, for reading */ /* from the log device. */ /* ------------------------------------------------------------------------ */ int ipf_log_items(ipf_main_softc_t *softc, int unit, fr_info_t *fin, void **items, size_t *itemsz, int *types, int cnt) { ipf_log_softc_t *softl = softc->ipf_log_soft; char *buf, *ptr; iplog_t *ipl; size_t len; int i; SPL_INT(s); /* * Get the total amount of data to be logged. */ for (i = 0, len = sizeof(iplog_t); i < cnt; i++) len += itemsz[i]; SPL_NET(s); MUTEX_ENTER(&softl->ipl_mutex[unit]); softl->ipl_counter[unit]++; /* * check that we have space to record this information and can * allocate that much. */ if ((softl->ipl_used[unit] + len) > softl->ipl_logsize) { softl->ipl_logfail[unit]++; MUTEX_EXIT(&softl->ipl_mutex[unit]); return -1; } KMALLOCS(buf, char *, len); if (buf == NULL) { softl->ipl_logfail[unit]++; MUTEX_EXIT(&softl->ipl_mutex[unit]); return -1; } ipl = (iplog_t *)buf; ipl->ipl_magic = softl->ipl_magic[unit]; ipl->ipl_count = 1; ipl->ipl_seqnum = softl->ipl_counter[unit]; ipl->ipl_next = NULL; ipl->ipl_dsize = len; #ifdef _KERNEL GETKTIME(&ipl->ipl_sec); #else ipl->ipl_sec = 0; ipl->ipl_usec = 0; #endif /* * Loop through all the items to be logged, copying each one to the * buffer. Use bcopy for normal data or the mb_t copyout routine. */ for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) { if (types[i] == 0) { memcpy(ptr, items[i], itemsz[i]); } else if (types[i] == 1) { COPYDATA(items[i], 0, itemsz[i], ptr); } ptr += itemsz[i]; } /* * Check to see if this log record has a CRC which matches the last * record logged. If it does, just up the count on the previous one * rather than create a new one. */ if (softl->ipl_suppress) { if ((fin != NULL) && (fin->fin_off == 0)) { if ((softl->ipll[unit] != NULL) && (fin->fin_crc == softl->ipl_crc[unit].fin_crc) && bcmp((char *)fin, (char *)&softl->ipl_crc[unit], FI_LCSIZE) == 0) { softl->ipll[unit]->ipl_count++; MUTEX_EXIT(&softl->ipl_mutex[unit]); SPL_X(s); KFREES(buf, len); return 0; } bcopy((char *)fin, (char *)&softl->ipl_crc[unit], FI_LCSIZE); softl->ipl_crc[unit].fin_crc = fin->fin_crc; } else bzero((char *)&softl->ipl_crc[unit], FI_CSIZE); } /* * advance the log pointer to the next empty record and deduct the * amount of space we're going to use. */ softl->ipl_logok[unit]++; softl->ipll[unit] = ipl; *softl->iplh[unit] = ipl; softl->iplh[unit] = &ipl->ipl_next; softl->ipl_used[unit] += len; /* * Now that the log record has been completed and added to the queue, * wake up any listeners who may want to read it. */ # if SOLARIS && defined(_KERNEL) cv_signal(&softl->ipl_wait[unit]); MUTEX_EXIT(&softl->ipl_mutex[unit]); pollwakeup(&softc->ipf_poll_head[unit], POLLRDNORM); # else MUTEX_EXIT(&softl->ipl_mutex[unit]); WAKEUP(softl->iplh, unit); POLLWAKEUP(unit); # endif SPL_X(s); # ifdef IPL_SELECT iplog_input_ready(unit); # endif return 0; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_read */ /* Returns: int - 0 == success, else error value. */ /* Parameters: softc(I) - pointer to main soft context */ /* unit(I) - device we are reading from */ /* uio(O) - pointer to information about where to store data */ /* */ /* Called to handle a read on an IPFilter device. Returns only complete */ /* log messages - will not partially copy a log record out to userland. */ /* */ /* NOTE: This function will block and wait for a signal to return data if */ /* there is none present. Asynchronous I/O is not implemented. */ /* ------------------------------------------------------------------------ */ int ipf_log_read(ipf_main_softc_t *softc, minor_t unit, struct uio *uio) { ipf_log_softc_t *softl = softc->ipf_log_soft; size_t dlen, copied; int error = 0; iplog_t *ipl; SPL_INT(s); if (softl->ipl_log_init == 0) { IPFERROR(40007); return 0; } /* * Sanity checks. Make sure the minor # is valid and we're copying * a valid chunk of data. */ if (IPL_LOGMAX < unit) { IPFERROR(40001); return ENXIO; } if (uio->uio_resid == 0) return 0; if (uio->uio_resid < sizeof(iplog_t)) { IPFERROR(40002); return EINVAL; } if (uio->uio_resid > softl->ipl_logsize) { IPFERROR(40005); return EINVAL; } /* * Lock the log so we can snapshot the variables. Wait for a signal * if the log is empty. */ SPL_NET(s); MUTEX_ENTER(&softl->ipl_mutex[unit]); softl->ipl_readers[unit]++; while (softl->ipl_log_init == 1 && softl->iplt[unit] == NULL) { # if SOLARIS && defined(_KERNEL) if (!cv_wait_sig(&softl->ipl_wait[unit], &softl->ipl_mutex[unit].ipf_lk)) { softl->ipl_readers[unit]--; MUTEX_EXIT(&softl->ipl_mutex[unit]); IPFERROR(40003); return EINTR; } # else # if defined(__hpux) && defined(_KERNEL) lock_t *l; # ifdef IPL_SELECT if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) { /* this is no blocking system call */ softl->ipl_readers[unit]--; MUTEX_EXIT(&softl->ipl_mutex[unit]); return 0; } # endif MUTEX_EXIT(&softl->ipl_mutex[unit]); l = get_sleep_lock(&softl->iplh[unit]); error = sleep(&softl->iplh[unit], PZERO+1); spinunlock(l); # else # if defined(__osf__) && defined(_KERNEL) error = mpsleep(&softl->iplh[unit], PSUSP|PCATCH, "ipfread", 0, &softl->ipl_mutex, MS_LOCK_SIMPLE); # else MUTEX_EXIT(&softl->ipl_mutex[unit]); SPL_X(s); error = SLEEP(unit + softl->iplh, "ipl sleep"); # endif /* __osf__ */ # endif /* __hpux */ SPL_NET(s); MUTEX_ENTER(&softl->ipl_mutex[unit]); if (error) { softl->ipl_readers[unit]--; MUTEX_EXIT(&softl->ipl_mutex[unit]); IPFERROR(40004); return error; } # endif /* SOLARIS */ } if (softl->ipl_log_init != 1) { softl->ipl_readers[unit]--; MUTEX_EXIT(&softl->ipl_mutex[unit]); IPFERROR(40008); return EIO; } # if (defined(BSD) && (BSD >= 199101)) || defined(__FreeBSD__) || \ defined(__osf__) uio->uio_rw = UIO_READ; # endif for (copied = 0; (ipl = softl->iplt[unit]) != NULL; copied += dlen) { dlen = ipl->ipl_dsize; if (dlen > uio->uio_resid) break; /* * Don't hold the mutex over the uiomove call. */ softl->iplt[unit] = ipl->ipl_next; softl->ipl_used[unit] -= dlen; MUTEX_EXIT(&softl->ipl_mutex[unit]); SPL_X(s); error = UIOMOVE((void *)ipl, dlen, UIO_READ, uio); if (error) { SPL_NET(s); MUTEX_ENTER(&softl->ipl_mutex[unit]); IPFERROR(40006); ipl->ipl_next = softl->iplt[unit]; softl->iplt[unit] = ipl; softl->ipl_used[unit] += dlen; break; } MUTEX_ENTER(&softl->ipl_mutex[unit]); KFREES((void *)ipl, dlen); SPL_NET(s); } if (!softl->iplt[unit]) { softl->ipl_used[unit] = 0; softl->iplh[unit] = &softl->iplt[unit]; softl->ipll[unit] = NULL; } softl->ipl_readers[unit]--; MUTEX_EXIT(&softl->ipl_mutex[unit]); SPL_X(s); return error; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_clear */ /* Returns: int - number of log bytes cleared. */ /* Parameters: softc(I) - pointer to main soft context */ /* unit(I) - device we are reading from */ /* */ /* Deletes all queued up log records for a given output device. */ /* ------------------------------------------------------------------------ */ int ipf_log_clear(ipf_main_softc_t *softc, minor_t unit) { ipf_log_softc_t *softl = softc->ipf_log_soft; iplog_t *ipl; int used; SPL_INT(s); SPL_NET(s); MUTEX_ENTER(&softl->ipl_mutex[unit]); while ((ipl = softl->iplt[unit]) != NULL) { softl->iplt[unit] = ipl->ipl_next; KFREES((void *)ipl, ipl->ipl_dsize); } softl->iplh[unit] = &softl->iplt[unit]; softl->ipll[unit] = NULL; used = softl->ipl_used[unit]; softl->ipl_used[unit] = 0; bzero((char *)&softl->ipl_crc[unit], FI_CSIZE); MUTEX_EXIT(&softl->ipl_mutex[unit]); SPL_X(s); return used; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_canread */ /* Returns: int - 0 == no data to read, 1 = data present */ /* Parameters: softc(I) - pointer to main soft context */ /* unit(I) - device we are reading from */ /* */ /* Returns an indication of whether or not there is data present in the */ /* current buffer for the selected ipf device. */ /* ------------------------------------------------------------------------ */ int ipf_log_canread(ipf_main_softc_t *softc, int unit) { ipf_log_softc_t *softl = softc->ipf_log_soft; return softl->iplt[unit] != NULL; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_canread */ /* Returns: int - 0 == no data to read, 1 = data present */ /* Parameters: softc(I) - pointer to main soft context */ /* unit(I) - device we are reading from */ /* */ /* Returns how many bytes are currently held in log buffers for the */ /* selected ipf device. */ /* ------------------------------------------------------------------------ */ int ipf_log_bytesused(ipf_main_softc_t *softc, int unit) { ipf_log_softc_t *softl = softc->ipf_log_soft; if (softl == NULL) return 0; return softl->ipl_used[unit]; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_failures */ /* Returns: U_QUAD_T - number of log failures */ /* Parameters: softc(I) - pointer to main soft context */ /* unit(I) - device we are reading from */ /* */ /* Returns how many times we've tried to log a packet but failed to do so */ /* for the selected ipf device. */ /* ------------------------------------------------------------------------ */ u_long ipf_log_failures(ipf_main_softc_t *softc, int unit) { ipf_log_softc_t *softl = softc->ipf_log_soft; if (softl == NULL) return 0; return softl->ipl_logfail[unit]; } /* ------------------------------------------------------------------------ */ /* Function: ipf_log_logok */ /* Returns: U_QUAD_T - number of packets logged */ /* Parameters: softc(I) - pointer to main soft context */ /* unit(I) - device we are reading from */ /* */ /* Returns how many times we've successfully logged a packet for the */ /* selected ipf device. */ /* ------------------------------------------------------------------------ */ u_long ipf_log_logok(ipf_main_softc_t *softc, int unit) { ipf_log_softc_t *softl = softc->ipf_log_soft; if (softl == NULL) return 0; return softl->ipl_logok[unit]; } #endif /* IPFILTER_LOG */