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05ddbb8d93
freebsd-skq/ip_log.c
Cy Schubert 05ddbb8d93 Import IP-Filter 5.1.2 into vendor branches using the existing license that 
the current version of IP-Filter in FreeBSD is under as per email received
from Darren Reed on Mon, 08 Jul 2013 23:54:16 +1000.

Approved by:	glebius (Mentor), Darren Reed <darrenr@reed.wattle.id.au>
2013-08-11 14:28:45 +00:00

951 lines
27 KiB
C
Raw Blame History

/*
* Copyright (C) 2012 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* $Id$
*/
#include <sys/param.h>
#if defined(KERNEL) || defined(_KERNEL)
# undef KERNEL
# undef _KERNEL
# define KERNEL 1
# define _KERNEL 1
#endif
#if defined(__FreeBSD__) && !defined(_KERNEL)
# include <osreldate.h>
#endif
#ifndef SOLARIS
# define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
#endif
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/file.h>
#ifndef _KERNEL
# include <stdio.h>
# include <string.h>
# include <stdlib.h>
# include <ctype.h>
# define _KERNEL
# define KERNEL
# ifdef __OpenBSD__
struct file;
# endif
# include <sys/uio.h>
# undef _KERNEL
# undef KERNEL
#endif
#if (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) && \
defined(_KERNEL)
# include <sys/fcntl.h>
# include <sys/filio.h>
#else
# include <sys/ioctl.h>
#endif
#include <sys/time.h>
#if defined(_KERNEL)
# include <sys/systm.h>
# if (defined(NetBSD) && (__NetBSD_Version__ >= 104000000))
# include <sys/proc.h>
# 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 <sys/dirent.h>
# else
# include <sys/dir.h>
# endif
# include <sys/mbuf.h>
# include <sys/select.h>
# if __FreeBSD_version >= 500000
# include <sys/selinfo.h>
# endif
#else
# if !defined(__hpux) && defined(_KERNEL)
# include <sys/filio.h>
# include <sys/cred.h>
# include <sys/ddi.h>
# include <sys/sunddi.h>
# include <sys/ksynch.h>
# include <sys/kmem.h>
# include <sys/mkdev.h>
# include <sys/dditypes.h>
# include <sys/cmn_err.h>
# endif /* !__hpux */
#endif /* !SOLARIS && !__hpux */
#if !defined(linux)
# include <sys/protosw.h>
#endif
#include <sys/socket.h>
#include <net/if.h>
#ifdef sun
# include <net/af.h>
#endif
#if __FreeBSD_version >= 300000
# include <net/if_var.h>
#endif
#include <netinet/in.h>
#ifdef __sgi
# include <sys/ddi.h>
# ifdef IFF_DRVRLOCK /* IRIX6 */
# include <sys/hashing.h>
# endif
#endif
#if !defined(__hpux) && !defined(linux) && \
!(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/
# include <netinet/in_var.h>
#endif
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/ip_icmp.h>
#ifdef USE_INET6
# include <netinet/icmp6.h>
#endif
#if !defined(linux)
# include <netinet/ip_var.h>
#endif
#ifndef _KERNEL
# include <syslog.h>
#endif
#include "netinet/ip_compat.h"
#include <netinet/tcpip.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 <sys/malloc.h>
#endif
/* END OF INCLUDES */
#ifdef IPFILTER_LOG
# if defined(IPL_SELECT)
# include <machine/sys/user.h>
# include <sys/kthread_iface.h>
# 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 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()
{
return 0;
}
int
ipf_log_main_unload()
{
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(softc)
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(softc, arg)
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(softc, arg)
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]);
}
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(softc, arg)
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
MUTEX_DESTROY(&softl->ipl_mutex[i]);
}
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(fin, flags)
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(softc, unit, fin, items, itemsz, types, cnt)
ipf_main_softc_t *softc;
int unit;
fr_info_t *fin;
void **items;
size_t *itemsz;
int *types, cnt;
{
ipf_log_softc_t *softl = softc->ipf_log_soft;
caddr_t 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, caddr_t, 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) {
bcopy(items[i], ptr, 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(softc, unit, uio)
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(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((caddr_t)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(softc, unit)
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((caddr_t)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(softc, unit)
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(softc, unit)
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(softc, unit)
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(softc, unit)
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 */
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