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Import kernel parts of ipfilter-3.2.1

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This commit is contained in:
Peter Wemm 1997-11-16 05:55:52 +00:00
parent e10102a12a
commit 52aef1787c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/vendor-sys/ipfilter/dist-old/; revision=31187
16 changed files with 3691 additions and 926 deletions
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678
sys/netinet/fil.c
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@ -1,13 +1,13 @@
/*
* (C)opyright 1993-1996 by Darren Reed.
* Copyright (C) 1993-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
#if !defined(lint) && defined(LIBC_SCCS)
static char sccsid[] = "@(#)fil.c 1.36 6/5/96 (C) 1993-1996 Darren Reed";
static char rcsid[] = "$Id: fil.c,v 2.0.2.13 1997/05/24 07:33:37 darrenr Exp $";
#if !defined(lint)
static const char sccsid[] = "@(#)fil.c 1.36 6/5/96 (C) 1993-1996 Darren Reed";
static const char rcsid[] = "@(#)$Id: fil.c,v 2.0.2.41.2.3 1997/11/12 10:44:22 darrenr Exp $";
#endif
#include <sys/errno.h>
@ -16,7 +16,7 @@ static char rcsid[] = "$Id: fil.c,v 2.0.2.13 1997/05/24 07:33:37 darrenr Exp $";
#include <sys/time.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#if defined(_KERNEL) || defined(KERNEL)
#if (defined(_KERNEL) || defined(KERNEL)) && !defined(linux)
# include <sys/systm.h>
#else
# include <stdio.h>
@ -24,14 +24,18 @@ static char rcsid[] = "$Id: fil.c,v 2.0.2.13 1997/05/24 07:33:37 darrenr Exp $";
#endif
#include <sys/uio.h>
#if !defined(__SVR4) && !defined(__svr4__)
# include <sys/mbuf.h>
# ifndef linux
# include <sys/mbuf.h>
# endif
#else
# include <sys/byteorder.h>
# include <sys/dditypes.h>
# include <sys/stream.h>
#endif
#include <sys/protosw.h>
#include <sys/socket.h>
#ifndef linux
# include <sys/protosw.h>
# include <sys/socket.h>
#endif
#include <net/if.h>
#ifdef sun
# include <net/af.h>
@ -40,17 +44,20 @@ static char rcsid[] = "$Id: fil.c,v 2.0.2.13 1997/05/24 07:33:37 darrenr Exp $";
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#ifndef linux
# include <netinet/ip_var.h>
#endif
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/tcpip.h>
#include <netinet/ip_icmp.h>
#include "netinet/ip_compat.h"
#include <netinet/tcpip.h>
#include "netinet/ip_fil.h"
#include "netinet/ip_proxy.h"
#include "netinet/ip_nat.h"
#include "netinet/ip_frag.h"
#include "netinet/ip_state.h"
#include "netinet/ip_auth.h"
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
#endif
@ -66,52 +73,68 @@ extern int opts;
second; }
# define FR_VERBOSE(verb_pr) verbose verb_pr
# define FR_DEBUG(verb_pr) debug verb_pr
# define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
# define SEND_RESET(ip, qif, q, if) send_reset(ip, if)
# define SEND_RESET(ip, qif, if) send_reset(ip, if)
# define IPLLOG(a, c, d, e) ipllog()
# define FR_NEWAUTH(m, fi, ip, qif) fr_newauth((mb_t *)m, fi, ip)
# if SOLARIS
# define ICMP_ERROR(b, ip, t, c, if, src) icmp_error(ip)
# else
# define ICMP_ERROR(b, ip, t, c, if, src) icmp_error(b, ip, if)
# endif
#else /* #ifndef _KERNEL */
# define FR_IFVERBOSE(ex,second,verb_pr) ;
# define FR_IFDEBUG(ex,second,verb_pr) ;
# define FR_VERBOSE(verb_pr)
# define FR_DEBUG(verb_pr)
# define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
# define IPLLOG(a, c, d, e) ipllog(a, IPL_LOGIPF, c, d, e)
# if SOLARIS
extern kmutex_t ipf_mutex;
# define SEND_RESET(ip, qif, q, if) send_reset(ip, qif, q)
# define ICMP_ERROR(b, ip, t, c, if, src) \
icmp_error(b, ip, t, c, if, src)
# else
# define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
# define SEND_RESET(ip, qif, q, if) send_reset((struct tcpiphdr *)ip)
# if BSD < 199103
# define ICMP_ERROR(b, ip, t, c, if, src) \
icmp_error(mtod(b, ip_t *), t, c, if, src)
# else
# define ICMP_ERROR(b, ip, t, c, if, src) \
icmp_error(b, t, c, (src).s_addr, if)
# endif
# define IPLLOG(a, c, d, e) ipflog(a, c, d, e)
# if SOLARIS || defined(__sgi)
extern kmutex_t ipf_mutex, ipf_auth;
# endif
#endif
# if SOLARIS
# define FR_NEWAUTH(m, fi, ip, qif) fr_newauth((mb_t *)m, fi, \
ip, qif)
# define SEND_RESET(ip, qif, if) send_reset(ip, qif)
# define ICMP_ERROR(b, ip, t, c, if, src) \
icmp_error(ip, t, c, if, src)
# else /* SOLARIS */
# define FR_NEWAUTH(m, fi, ip, qif) fr_newauth((mb_t *)m, fi, ip)
# define SEND_RESET(ip, qif, if) send_reset((struct tcpiphdr *)ip)
# ifdef __sgi
# define ICMP_ERROR(b, ip, t, c, if, src) \
icmp_error(b, t, c, if, src, if)
# else
# if BSD < 199103
# ifdef linux
# define ICMP_ERROR(b, ip, t, c, if, src) icmp_send(b,t,c,0,if)
# else
# define ICMP_ERROR(b, ip, t, c, if, src) \
icmp_error(mtod(b, ip_t *), t, c, if, src)
# endif /* linux */
# else
# define ICMP_ERROR(b, ip, t, c, if, src) \
icmp_error(b, t, c, (src).s_addr, if)
# endif /* BSD < 199103 */
# endif /* __sgi */
# endif /* SOLARIS || __sgi */
#endif /* _KERNEL */
struct filterstats frstats[2] = {{0,0,0,0,0},{0,0,0,0,0}};
struct frentry *ipfilter[2][2] = { { NULL, NULL }, { NULL, NULL } },
*ipacct[2][2] = { { NULL, NULL }, { NULL, NULL } };
struct frgroup *ipfgroups[3][2];
int fr_flags = IPF_LOGGING, fr_active = 0;
#if defined(IPFILTER_DEFAULT_BLOCK)
int fr_pass = FR_NOMATCH|FR_BLOCK;
#else
int fr_pass = (IPF_DEFAULT_PASS|FR_NOMATCH);
#endif
fr_info_t frcache[2];
static void fr_makefrip __P((int, ip_t *, fr_info_t *));
static int fr_tcpudpchk __P((frentry_t *, fr_info_t *));
static int fr_scanlist __P((int, ip_t *, fr_info_t *, void *));
static int frflushlist __P((int, int, int *, frentry_t *, frentry_t **));
/*
@ -176,6 +199,8 @@ fr_info_t *fin;
fin->fin_data[0] = 0;
fin->fin_data[1] = 0;
fin->fin_rule = -1;
fin->fin_group = -1;
fin->fin_id = ip->ip_id;
#ifdef _KERNEL
fin->fin_icode = ipl_unreach;
#endif
@ -186,10 +211,10 @@ fr_info_t *fin;
tcp = (tcphdr_t *)((char *)ip + hlen);
fin->fin_dp = (void *)tcp;
(*(((u_short *)fi) + 1)) = (*(((u_short *)ip) + 4));
(*(((u_long *)fi) + 1)) = (*(((u_long *)ip) + 3));
(*(((u_long *)fi) + 2)) = (*(((u_long *)ip) + 4));
(*(((u_32_t *)fi) + 1)) = (*(((u_32_t *)ip) + 3));
(*(((u_32_t *)fi) + 2)) = (*(((u_32_t *)ip) + 4));
fi->fi_fl = (hlen > sizeof(struct ip)) ? FI_OPTIONS : 0;
fi->fi_fl = (hlen > sizeof(ip_t)) ? FI_OPTIONS : 0;
off = (ip->ip_off & 0x1fff) << 3;
if (ip->ip_off & 0x3fff)
fi->fi_fl |= FI_FRAG;
@ -371,7 +396,7 @@ fr_info_t *fin;
* Could be per interface, but this gets real nasty when you don't have
* kernel sauce.
*/
static int fr_scanlist(pass, ip, fin, m)
int fr_scanlist(pass, ip, fin, m)
int pass;
ip_t *ip;
register fr_info_t *fin;
@ -379,18 +404,23 @@ void *m;
{
register struct frentry *fr;
register fr_ip_t *fi = &fin->fin_fi;
int rulen, portcmp = 0, off;
int rulen, portcmp = 0, off, skip = 0;
fr = fin->fin_fr;
fin->fin_fr = NULL;
fin->fin_rule = 0;
fin->fin_group = 0;
off = ip->ip_off & 0x1fff;
pass |= (fi->fi_fl << 20);
pass |= (fi->fi_fl << 24);
if ((fi->fi_fl & FI_TCPUDP) && (fin->fin_dlen > 3) && !off)
portcmp = 1;
for (rulen = 0; fr; fr = fr->fr_next, rulen++) {
if (skip) {
skip--;
continue;
}
/*
* In all checks below, a null (zero) value in the
* filter struture is taken to mean a wildcard.
@ -403,18 +433,19 @@ void *m;
#else
if (opts & (OPT_VERBOSE|OPT_DEBUG))
printf("\n");
FR_VERBOSE(("%c", (pass & FR_PASS) ? 'p' : 'b'));
FR_VERBOSE(("%c", (pass & FR_PASS) ? 'p' :
(pass & FR_AUTH) ? 'a' : 'b'));
if (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp)
continue;
FR_VERBOSE((":i"));
#endif
{
register u_long *ld, *lm, *lip;
register int i, j;
register u_32_t *ld, *lm, *lip;
register int i;
lip = (u_long *)fi;
lm = (u_long *)&fr->fr_mip;
ld = (u_long *)&fr->fr_ip;
lip = (u_32_t *)fi;
lm = (u_32_t *)&fr->fr_mip;
ld = (u_32_t *)&fr->fr_ip;
i = ((lip[0] & lm[0]) != ld[0]);
FR_IFDEBUG(i,continue,("0. %#08x & %#08x != %#08x\n",
lip[0], lm[0], ld[0]));
@ -462,7 +493,8 @@ void *m;
/*
* Just log this packet...
*/
pass = fr->fr_flags;
if (!(skip = fr->fr_skip))
pass = fr->fr_flags;
if ((pass & FR_CALLNOW) && fr->fr_func)
pass = (*fr->fr_func)(pass, ip, fin);
#ifdef IPFILTER_LOG
@ -479,7 +511,17 @@ void *m;
else
fin->fin_icode = fr->fr_icode;
fin->fin_rule = rulen;
fin->fin_group = fr->fr_group;
fin->fin_fr = fr;
if (fr->fr_grp) {
fin->fin_fr = fr->fr_grp;
pass = fr_scanlist(pass, ip, fin, m);
if (fin->fin_fr == NULL) {
fin->fin_rule = rulen;
fin->fin_group = fr->fr_group;
fin->fin_fr = fr;
}
}
if (pass & FR_QUICK)
break;
}
@ -493,23 +535,16 @@ void *m;
* or not to pass it on or not.
*/
int fr_check(ip, hlen, ifp, out
#ifdef _KERNEL
# if SOLARIS
, qif, q, mp)
#if defined(_KERNEL) && SOLARIS
, qif, mp)
qif_t *qif;
queue_t *q;
mblk_t **mp;
# else
, mp)
struct mbuf **mp;
# endif
#else
, mp)
char *mp;
#endif
mb_t **mp;
ip_t *ip;
int hlen;
struct ifnet *ifp;
void *ifp;
int out;
{
/*
@ -518,34 +553,66 @@ int out;
fr_info_t frinfo, *fc;
register fr_info_t *fin = &frinfo;
frentry_t *fr = NULL;
int pass, changed;
#ifndef _KERNEL
char *mc = mp, *m = mp;
int pass, changed, apass;
#if !SOLARIS || !defined(_KERNEL)
register mb_t *m = *mp;
#endif
#ifdef _KERNEL
mb_t *mc = NULL;
# if !defined(__SVR4) && !defined(__svr4__)
register struct mbuf *m = *mp;
struct mbuf *mc = NULL;
# ifdef __sgi
char hbuf[(0xf << 2) + sizeof(struct icmp) + sizeof(ip_t) + 8];
# endif
int up;
if ((ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP ||
ip->ip_p == IPPROTO_ICMP)) {
register int up = MIN(hlen + 8, ip->ip_len);
int plen = 0;
switch(ip->ip_p)
{
case IPPROTO_TCP:
plen = sizeof(tcphdr_t);
break;
case IPPROTO_UDP:
plen = sizeof(udphdr_t);
break;
case IPPROTO_ICMP:
/* 96 - enough for complete ICMP error IP header */
plen = sizeof(struct icmp) + sizeof(ip_t) + 8;
break;
}
up = MIN(hlen + plen, ip->ip_len);
if (up > m->m_len) {
#ifdef __sgi /* Under IRIX, avoid m_pullup as it makes ping <hostname> panic */
if ((up > sizeof(hbuf)) || (m_length(m) < up)) {
frstats[out].fr_pull[1]++;
return -1;
}
m_copydata(m, 0, up, hbuf);
frstats[out].fr_pull[0]++;
ip = (ip_t *)hbuf;
#else
# ifndef linux
if ((*mp = m_pullup(m, up)) == 0) {
frstats[out].fr_pull[1]++;
return -1;
} else {
frstats[out].fr_pull[0]++;
m = *mp;
ip = mtod(m, struct ip *);
ip = mtod(m, ip_t *);
}
}
}
# endif
#endif
} else
up = 0;
} else
up = 0;
# endif
# if SOLARIS
mblk_t *mc = NULL, *m = qif->qf_m;
mb_t *m = qif->qf_m;
# endif
#endif
fr_makefrip(hlen, ip, fin);
@ -554,33 +621,78 @@ int out;
fin->fin_mp = mp;
MUTEX_ENTER(&ipf_mutex);
/*
* Check auth now. This, combined with the check below to see if apass
* is 0 is to ensure that we don't count the packet twice, which can
* otherwise occur when we reprocess it. As it is, we only count it
* after it has no auth. table matchup. This also stops NAT from
* occuring until after the packet has been auth'd.
*/
apass = fr_checkauth(ip, fin);
if (!out) {
changed = ip_natin(ip, hlen, fin);
if ((fin->fin_fr = ipacct[0][fr_active]) &&
if (!apass && (fin->fin_fr = ipacct[0][fr_active]) &&
(FR_SCANLIST(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT))
frstats[0].fr_acct++;
}
if (!(pass = ipfr_knownfrag(ip, fin)) &&
!(pass = fr_checkstate(ip, fin))) {
fc = frcache + out;
if (fc->fin_fr && !bcmp((char *)fin, (char *)fc, FI_CSIZE)) {
/*
* copy cached data so we can unlock the mutex
* earlier.
*/
bcopy((char *)fc, (char *)fin, sizeof(*fin));
frstats[out].fr_chit++;
pass = fin->fin_fr->fr_flags;
} else {
pass = fr_pass;
if ((fin->fin_fr = ipfilter[out][fr_active]))
pass = FR_SCANLIST(fr_pass, ip, fin, m);
bcopy((char *)fin, (char *)fc, FI_CSIZE);
if (pass & FR_NOMATCH)
frstats[out].fr_nom++;
if (apass || (!(pass = ipfr_knownfrag(ip, fin)) &&
!(pass = fr_checkstate(ip, fin)))) {
/*
* If a packet is found in the auth table, then skip checking
* the access lists for permission but we do need to consider
* the result as if it were from the ACL's.
*/
if (!apass) {
fc = frcache + out;
if (!bcmp((char *)fin, (char *)fc, FI_CSIZE)) {
/*
* copy cached data so we can unlock the mutex
* earlier.
*/
bcopy((char *)fc, (char *)fin, FI_COPYSIZE);
frstats[out].fr_chit++;
if ((fr = fin->fin_fr)) {
fr->fr_hits++;
pass = fr->fr_flags;
} else
pass = fr_pass;
} else {
pass = fr_pass;
if ((fin->fin_fr = ipfilter[out][fr_active]))
pass = FR_SCANLIST(fr_pass, ip, fin, m);
bcopy((char *)fin, (char *)fc, FI_COPYSIZE);
if (pass & FR_NOMATCH)
frstats[out].fr_nom++;
}
fr = fin->fin_fr;
} else
pass = apass;
/*
* If we fail to add a packet to the authorization queue,
* then we drop the packet later. However, if it was added
* then pretend we've dropped it already.
*/
if ((pass & FR_AUTH))
if (FR_NEWAUTH(m, fin, ip, qif) != 0)
#ifdef _KERNEL
m = *mp = NULL;
#else
;
#endif
if (pass & FR_PREAUTH) {
MUTEX_ENTER(&ipf_auth);
if ((fin->fin_fr = ipauth) &&
(pass = FR_SCANLIST(0, ip, fin, m)))
fr_authstats.fas_hits++;
else
fr_authstats.fas_miss++;
MUTEX_EXIT(&ipf_auth);
}
fr = fin->fin_fr;
if (pass & FR_KEEPFRAG) {
if (fin->fin_fi.fi_fl & FI_FRAG) {
@ -602,7 +714,11 @@ int out;
if (fr && fr->fr_func && !(pass & FR_CALLNOW))
pass = (*fr->fr_func)(pass, ip, fin);
if (out) {
/*
* Only count/translate packets which will be passed on, out the
* interface.
*/
if (out && (pass & FR_PASS)) {
if ((fin->fin_fr = ipacct[1][fr_active]) &&
(FR_SCANLIST(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT))
frstats[1].fr_acct++;
@ -649,7 +765,9 @@ int out;
# if SOLARIS
mc = dupmsg(m);
# else
# ifndef linux
mc = m_copy(m, 0, M_COPYALL);
# endif
# endif
#endif
@ -680,7 +798,7 @@ int out;
frstats[0].fr_ret++;
} else if ((pass & FR_RETRST) &&
!(fin->fin_fi.fi_fl & FI_SHORT)) {
if (SEND_RESET(ip, qif, q, ifp) == 0)
if (SEND_RESET(ip, qif, ifp) == 0)
frstats[1].fr_ret++;
}
#else
@ -703,8 +821,9 @@ int out;
* Once we're finished return to our caller, freeing the packet if
* we are dropping it (* BSD ONLY *).
*/
#ifdef _KERNEL
# if !SOLARIS
#if defined(_KERNEL)
# if !SOLARIS
# if !defined(linux)
if (fr) {
frdest_t *fdp = &fr->fr_tif;
@ -718,8 +837,13 @@ int out;
}
if (!(pass & FR_PASS) && m)
m_freem(m);
# ifdef __sgi
else if (changed && up && m)
m_copyback(m, 0, up, hbuf);
# endif
# endif /* !linux */
return (pass & FR_PASS) ? 0 : -1;
# else
# else /* !SOLARIS */
if (fr) {
frdest_t *fdp = &fr->fr_tif;
@ -732,49 +856,23 @@ int out;
ipfr_fastroute(qif, ip, mc, mp, fin, &fr->fr_dif);
}
return (pass & FR_PASS) ? changed : -1;
# endif
#else
# endif /* !SOLARIS */
#else /* _KERNEL */
if (pass & FR_NOMATCH)
return 1;
if (pass & FR_PASS)
return 0;
if (pass & FR_AUTH)
return -2;
return -1;
#endif
#endif /* _KERNEL */
}
#ifdef IPFILTER_LOG
int fr_copytolog(dev, buf, len)
int dev;
char *buf;
int len;
{
register char *bufp = iplbuf[dev], *tp = iplt[dev], *hp = iplh[dev];
register int clen, tail;
tail = (hp >= tp) ? (bufp + IPLLOGSIZE - hp) : (tp - hp);
clen = MIN(tail, len);
bcopy(buf, hp, clen);
len -= clen;
tail -= clen;
hp += clen;
buf += clen;
if (hp == bufp + IPLLOGSIZE) {
hp = bufp;
tail = tp - hp;
}
if (len && tail) {
clen = MIN(tail, len);
bcopy(buf, hp, clen);
len -= clen;
hp += clen;
}
iplh[dev] = hp;
return len;
}
#endif
/*
* ipf_cksum
* addr should be 16bit aligned and len is in bytes.
*/
u_short ipf_cksum(addr, len)
register u_short *addr;
register int len;
@ -803,11 +901,7 @@ register int len;
* odd sizes.
*/
u_short fr_tcpsum(m, ip, tcp)
#if SOLARIS
mblk_t *m;
#else
struct mbuf *m;
#endif
mb_t *m;
ip_t *ip;
tcphdr_t *tcp;
{
@ -817,12 +911,22 @@ tcphdr_t *tcp;
} bytes;
u_long sum;
u_short *sp;
int len, add, hlen, ilen;
int len;
# if SOLARIS || defined(__sgi)
int add, hlen;
# endif
# if SOLARIS
/* skip any leading M_PROTOs */
while(m && (MTYPE(m) != M_DATA))
m = m->b_cont;
PANIC((!m),("fr_tcpsum: no M_DATA"));
# endif
/*
* Add up IP Header portion
*/
ilen = len = ip->ip_len - (ip->ip_hl << 2);
len = ip->ip_len - (ip->ip_hl << 2);
bytes.c[0] = 0;
bytes.c[1] = IPPROTO_TCP;
sum = bytes.s;
@ -855,35 +959,58 @@ tcphdr_t *tcp;
while (hlen) {
add = MIN(hlen, m->b_wptr - m->b_rptr);
sp = (u_short *)((caddr_t)m->b_rptr + add);
if ((hlen -= add))
hlen -= add;
if ((caddr_t)sp >= (caddr_t)m->b_wptr) {
m = m->b_cont;
PANIC((!m),("fr_tcpsum: not enough data"));
if (!hlen)
sp = (u_short *)m->b_rptr;
}
}
}
#endif
#ifdef __sgi
/*
* In case we had to copy the IP & TCP header out of mbufs,
* skip over the mbuf bits which are the header
*/
if ((caddr_t)ip != mtod(m, caddr_t)) {
hlen = (caddr_t)sp - (caddr_t)ip;
while (hlen) {
add = MIN(hlen, m->m_len);
sp = (u_short *)(mtod(m, caddr_t) + add);
hlen -= add;
if (add >= m->m_len) {
m = m->m_next;
PANIC((!m),("fr_tcpsum: not enough data"));
if (!hlen)
sp = mtod(m, u_short *);
}
}
}
#endif
if (!(len -= sizeof(*tcp)))
goto nodata;
while (len > 1) {
sum += *sp++;
len -= 2;
while (len > 0) {
#if SOLARIS
if ((caddr_t)sp > (caddr_t)m->b_wptr) {
if ((caddr_t)sp >= (caddr_t)m->b_wptr) {
m = m->b_cont;
PANIC((!m),("fr_tcpsum: not enough data"));
sp = (u_short *)m->b_rptr;
}
#else
# ifdef m_data
if ((caddr_t)sp > (m->m_data + m->m_len))
# else
if ((caddr_t)sp > (caddr_t)(m->m_dat + m->m_off + m->m_len))
# endif
if (((caddr_t)sp - mtod(m, caddr_t)) >= m->m_len)
{
m = m->m_next;
PANIC((!m),("fr_tcpsum: not enough data"));
sp = mtod(m, u_short *);
}
#endif /* SOLARIS */
if (len < 2)
break;
sum += *sp++;
len -= 2;
}
if (len) {
bytes.c[1] = 0;
@ -896,3 +1023,268 @@ tcphdr_t *tcp;
sum = (u_short)((~sum) & 0xffff);
return sum;
}
#if defined(_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || defined(__sgi) )
/*
* Copyright (c) 1982, 1986, 1988, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)uipc_mbuf.c 8.2 (Berkeley) 1/4/94
* $Id: fil.c,v 2.0.2.41.2.3 1997/11/12 10:44:22 darrenr Exp $
*/
/*
* Copy data from an mbuf chain starting "off" bytes from the beginning,
* continuing for "len" bytes, into the indicated buffer.
*/
void
m_copydata(m, off, len, cp)
register mb_t *m;
register int off;
register int len;
caddr_t cp;
{
register unsigned count;
if (off < 0 || len < 0)
panic("m_copydata");
while (off > 0) {
if (m == 0)
panic("m_copydata");
if (off < m->m_len)
break;
off -= m->m_len;
m = m->m_next;
}
while (len > 0) {
if (m == 0)
panic("m_copydata");
count = MIN(m->m_len - off, len);
bcopy(mtod(m, caddr_t) + off, cp, count);
len -= count;
cp += count;
off = 0;
m = m->m_next;
}
}
# ifndef linux
/*
* Copy data from a buffer back into the indicated mbuf chain,
* starting "off" bytes from the beginning, extending the mbuf
* chain if necessary.
*/
void
m_copyback(m0, off, len, cp)
struct mbuf *m0;
register int off;
register int len;
caddr_t cp;
{
register int mlen;
register struct mbuf *m = m0, *n;
int totlen = 0;
if (m0 == 0)
return;
while (off > (mlen = m->m_len)) {
off -= mlen;
totlen += mlen;
if (m->m_next == 0) {
n = m_getclr(M_DONTWAIT, m->m_type);
if (n == 0)
goto out;
n->m_len = min(MLEN, len + off);
m->m_next = n;
}
m = m->m_next;
}
while (len > 0) {
mlen = min (m->m_len - off, len);
bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen);
cp += mlen;
len -= mlen;
mlen += off;
off = 0;
totlen += mlen;
if (len == 0)
break;
if (m->m_next == 0) {
n = m_get(M_DONTWAIT, m->m_type);
if (n == 0)
break;
n->m_len = min(MLEN, len);
m->m_next = n;
}
m = m->m_next;
}
out:
#if 0
if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
m->m_pkthdr.len = totlen;
#endif
return;
}
# endif /* linux */
#endif /* (_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || __sgi) */
frgroup_t *fr_findgroup(num, flags, which, set, fgpp)
u_short num;
u_32_t flags;
int which, set;
frgroup_t ***fgpp;
{
frgroup_t *fg, **fgp;
if (which == IPL_LOGAUTH)
fgp = &ipfgroups[2][set];
else if (flags & FR_ACCOUNT)
fgp = &ipfgroups[1][set];
else if (flags & (FR_OUTQUE|FR_INQUE))
fgp = &ipfgroups[0][set];
else
return NULL;
while ((fg = *fgp))
if (fg->fg_num == num)
break;
else
fgp = &fg->fg_next;
if (fgpp)
*fgpp = fgp;
return fg;
}
frgroup_t *fr_addgroup(num, fp, which, set)
u_short num;
frentry_t *fp;
int which, set;
{
frgroup_t *fg, **fgp;
if ((fg = fr_findgroup(num, fp->fr_flags, which, set, &fgp)))
return fg;
KMALLOC(fg, frgroup_t *, sizeof(*fg));
if (fg) {
fg->fg_num = num;
fg->fg_next = *fgp;
fg->fg_head = fp;
fg->fg_start = &fp->fr_grp;
*fgp = fg;
}
return fg;
}
void fr_delgroup(num, flags, which, set)
u_short num;
u_32_t flags;
int which, set;
{
frgroup_t *fg, **fgp;
if (!(fg = fr_findgroup(num, flags, which, set, &fgp)))
return;
*fgp = fg->fg_next;
KFREE(fg);
}
/*
* recursively flush rules from the list, descending groups as they are
* encountered. if a rule is the head of a group and it has lost all its
* group members, then also delete the group reference.
*/
static int frflushlist(set, unit, nfreedp, list, listp)
int set, unit, *nfreedp;
frentry_t *list, **listp;
{
register frentry_t *fp = list, *fpn;
register int freed = 0;
while (fp) {
fpn = fp->fr_next;
if (fp->fr_grp) {
fp->fr_ref -= frflushlist(set, unit, nfreedp,
fp->fr_grp, &fp->fr_grp);
}
if (fp->fr_ref == 1) {
if (fp->fr_grhead)
fr_delgroup(fp->fr_grhead, fp->fr_flags, unit,
set);
KFREE(fp);
*listp = fpn;
freed++;
}
fp = fpn;
}
*nfreedp += freed;
return freed;
}
void frflush(unit, data)
int unit;
caddr_t data;
{
int flags = *(int *)data, flushed = 0, set = fr_active;
bzero((char *)frcache, sizeof(frcache[0]) * 2);
if (flags & FR_INACTIVE)
set = 1 - set;
if (unit == IPL_LOGIPF) {
if (flags & FR_OUTQUE) {
(void) frflushlist(set, unit, &flushed,
ipfilter[1][set],
&ipfilter[1][set]);
(void) frflushlist(set, unit, &flushed,
ipacct[1][set], &ipacct[1][set]);
}
if (flags & FR_INQUE) {
(void) frflushlist(set, unit, &flushed,
ipfilter[0][set],
&ipfilter[0][set]);
(void) frflushlist(set, unit, &flushed,
ipacct[0][set], &ipacct[0][set]);
}
}
*(int *)data = flushed;
}

494
sys/netinet/ip_auth.c Normal file
View File

@ -0,0 +1,494 @@
/*
* Copyright (C) 1997 by Darren Reed & Guido van Rooij.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
#if !defined(lint)
static const char rcsid[] = "@(#)$Id: ip_auth.c,v 2.0.2.21.2.2 1997/11/12 10:45:51 darrenr Exp $";
#endif
#if !defined(_KERNEL) && !defined(KERNEL)
# include <stdlib.h>
# include <string.h>
#endif
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/file.h>
#if defined(KERNEL) && (__FreeBSD_version >= 220000)
# include <sys/filio.h>
# include <sys/fcntl.h>
#else
# include <sys/ioctl.h>
#endif
#include <sys/uio.h>
#ifndef linux
# include <sys/protosw.h>
#endif
#include <sys/socket.h>
#if defined(_KERNEL) && !defined(linux)
# include <sys/systm.h>
#endif
#if !defined(__SVR4) && !defined(__svr4__)
# ifndef linux
# include <sys/mbuf.h>
# endif
#else
# include <sys/filio.h>
# include <sys/byteorder.h>
# include <sys/dditypes.h>
# include <sys/stream.h>
# include <sys/kmem.h>
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(bsdi)
# include <machine/cpu.h>
#endif
#include <net/if.h>
#ifdef sun
#include <net/af.h>
#endif
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#ifndef KERNEL
#define KERNEL
#define NOT_KERNEL
#endif
#ifndef linux
# include <netinet/ip_var.h>
#endif
#ifdef NOT_KERNEL
#undef KERNEL
#endif
#ifdef __sgi
# ifdef IFF_DRVRLOCK /* IRIX6 */
#include <sys/hashing.h>
# endif
#endif
#include <netinet/tcp.h>
#if defined(__sgi) && !defined(IFF_DRVRLOCK) /* IRIX < 6 */
extern struct ifqueue ipintrq; /* ip packet input queue */
#else
# ifndef linux
# include <netinet/in_var.h>
# include <netinet/tcp_fsm.h>
# endif
#endif
#include <netinet/udp.h>
#include <netinet/ip_icmp.h>
#include "netinet/ip_compat.h"
#include <netinet/tcpip.h>
#include "netinet/ip_fil.h"
#include "netinet/ip_auth.h"
#if !SOLARIS && !defined(linux)
# include <net/netisr.h>
#endif
#if (SOLARIS || defined(__sgi)) && defined(_KERNEL)
extern kmutex_t ipf_auth;
# if SOLARIS
extern kcondvar_t ipfauthwait;
# endif
#endif
#ifdef linux
static struct wait_queue *ipfauthwait = NULL;
#endif
int fr_authsize = FR_NUMAUTH;
int fr_authused = 0;
int fr_defaultauthage = 600;
fr_authstat_t fr_authstats;
frauth_t fr_auth[FR_NUMAUTH];
mb_t *fr_authpkts[FR_NUMAUTH];
int fr_authstart = 0, fr_authend = 0, fr_authnext = 0;
frauthent_t *fae_list = NULL;
frentry_t *ipauth = NULL;
/*
* Check if a packet has authorization. If the packet is found to match an
* authorization result and that would result in a feedback loop (i.e. it
* will end up returning FR_AUTH) then return FR_BLOCK instead.
*/
int fr_checkauth(ip, fin)
ip_t *ip;
fr_info_t *fin;
{
u_short id = ip->ip_id;
u_32_t pass;
int i;
MUTEX_ENTER(&ipf_auth);
for (i = fr_authstart; i != fr_authend; ) {
/*
* index becomes -2 only after an SIOCAUTHW. Check this in
* case the same packet gets sent again and it hasn't yet been
* auth'd.
*/
if ((fr_auth[i].fra_index == -2) &&
(id == fr_auth[i].fra_info.fin_id) &&
!bcmp((char *)fin,(char *)&fr_auth[i].fra_info,FI_CSIZE)) {
/*
* Avoid feedback loop.
*/
if (!(pass = fr_auth[i].fra_pass) || (pass & FR_AUTH))
pass = FR_BLOCK;
fr_authstats.fas_hits++;
fr_auth[i].fra_index = -1;
fr_authused--;
if (i == fr_authstart) {
while (fr_auth[i].fra_index == -1) {
i++;
if (i == FR_NUMAUTH)
i = 0;
fr_authstart = i;
if (i == fr_authend)
break;
}
if (fr_authstart == fr_authend) {
fr_authnext = 0;
fr_authstart = fr_authend = 0;
}
}
MUTEX_EXIT(&ipf_auth);
return pass;
}
i++;
if (i == FR_NUMAUTH)
i = 0;
}
fr_authstats.fas_miss++;
MUTEX_EXIT(&ipf_auth);
return 0;
}
/*
* Check if we have room in the auth array to hold details for another packet.
* If we do, store it and wake up any user programs which are waiting to
* hear about these events.
*/
int fr_newauth(m, fin, ip
#if defined(_KERNEL) && SOLARIS
, qif)
qif_t *qif;
#else
)
#endif
mb_t *m;
fr_info_t *fin;
ip_t *ip;
{
int i;
MUTEX_ENTER(&ipf_auth);
if ((fr_authstart > fr_authend) && (fr_authstart - fr_authend == -1)) {
fr_authstats.fas_nospace++;
MUTEX_EXIT(&ipf_auth);
return 0;
}
if (fr_authend - fr_authstart == FR_NUMAUTH - 1) {
fr_authstats.fas_nospace++;
MUTEX_EXIT(&ipf_auth);
return 0;
}
fr_authstats.fas_added++;
fr_authused++;
i = fr_authend++;
if (fr_authend == FR_NUMAUTH)
fr_authend = 0;
MUTEX_EXIT(&ipf_auth);
fr_auth[i].fra_index = i;
fr_auth[i].fra_pass = 0;
fr_auth[i].fra_age = fr_defaultauthage;
bcopy((char *)fin, (char *)&fr_auth[i].fra_info, sizeof(*fin));
#if !defined(sparc) && !defined(m68k)
/*
* No need to copyback here as we want to undo the changes, not keep
* them.
*/
# if SOLARIS && defined(_KERNEL)
if (ip == (ip_t *)m->b_rptr)
# endif
{
register u_short bo;
bo = ip->ip_len;
ip->ip_len = htons(bo);
# if !SOLARIS /* 4.4BSD converts this ip_input.c, but I don't in solaris.c */
bo = ip->ip_id;
ip->ip_id = htons(bo);
# endif
bo = ip->ip_off;
ip->ip_off = htons(bo);
}
#endif
#if SOLARIS && defined(_KERNEL)
m->b_rptr -= qif->qf_off;
fr_authpkts[i] = *(mblk_t **)fin->fin_mp;
fr_auth[i].fra_q = qif->qf_q;
cv_signal(&ipfauthwait);
#else
fr_authpkts[i] = m;
# if defined(linux) && defined(_KERNEL)
wake_up_interruptible(&ipfauthwait);
# else
WAKEUP(&fr_authnext);
# endif
#endif
return 1;
}
int fr_auth_ioctl(data, cmd, fr, frptr)
caddr_t data;
#if defined(__NetBSD__) || defined(__OpenBSD__)
u_long cmd;
#else
int cmd;
#endif
frentry_t *fr, **frptr;
{
mb_t *m;
#if defined(_KERNEL)
# if !SOLARIS
struct ifqueue *ifq;
int s;
# endif
#endif
frauth_t auth, *au = &auth;
frauthent_t *fae, **faep;
int i, error = 0;
switch (cmd)
{
case SIOCINIFR :
case SIOCRMIFR :
case SIOCADIFR :
error = EINVAL;
break;
case SIOCINAFR :
case SIOCRMAFR :
case SIOCADAFR :
for (faep = &fae_list; (fae = *faep); )
if (&fae->fae_fr == fr)
break;
else
faep = &fae->fae_next;
if (cmd == SIOCRMAFR) {
if (!fae)
error = ESRCH;
else {
*faep = fae->fae_next;
*frptr = fr->fr_next;
KFREE(fae);
}
} else {
KMALLOC(fae, frauthent_t *, sizeof(*fae));
if (fae != NULL) {
IRCOPY((char *)data, (char *)&fae->fae_fr,
sizeof(fae->fae_fr));
if (!fae->fae_age)
fae->fae_age = fr_defaultauthage;
fae->fae_fr.fr_hits = 0;
fae->fae_fr.fr_next = *frptr;
*frptr = &fae->fae_fr;
fae->fae_next = *faep;
*faep = fae;
} else
error = ENOMEM;
}
break;
case SIOCATHST:
IWCOPY((char *)&fr_authstats, data, sizeof(fr_authstats));
break;
case SIOCAUTHW:
fr_authioctlloop:
MUTEX_ENTER(&ipf_auth);
if ((fr_authnext != fr_authend) && fr_authpkts[fr_authnext]) {
IWCOPY((char *)&fr_auth[fr_authnext++], data,
sizeof(fr_info_t));
if (fr_authnext == FR_NUMAUTH)
fr_authnext = 0;
MUTEX_EXIT(&ipf_auth);
return 0;
}
#ifdef _KERNEL
# if SOLARIS
if (!cv_wait_sig(&ipfauthwait, &ipf_auth)) {
mutex_exit(&ipf_auth);
return EINTR;
}
# else
# ifdef linux
interruptible_sleep_on(&ipfauthwait);
if (current->signal & ~current->blocked)
error = -EINTR;
# else
error = SLEEP(&fr_authnext, "fr_authnext");
# endif
# endif
#endif
MUTEX_EXIT(&ipf_auth);
if (!error)
goto fr_authioctlloop;
break;
case SIOCAUTHR:
IRCOPY(data, (caddr_t)&auth, sizeof(auth));
MUTEX_ENTER(&ipf_auth);
i = au->fra_index;
if ((i < 0) || (i > FR_NUMAUTH) ||
(fr_auth[i].fra_info.fin_id != au->fra_info.fin_id)) {
MUTEX_EXIT(&ipf_auth);
return EINVAL;
}
m = fr_authpkts[i];
fr_auth[i].fra_index = -2;
fr_auth[i].fra_pass = au->fra_pass;
fr_authpkts[i] = NULL;
#ifdef _KERNEL
MUTEX_EXIT(&ipf_auth);
SPL_NET(s);
# ifndef linux
if (m && au->fra_info.fin_out) {
# if SOLARIS
error = fr_qout(fr_auth[i].fra_q, m);
# else /* SOLARIS */
error = ip_output(m, NULL, NULL, IP_FORWARDING, NULL);
# endif /* SOLARIS */
if (error)
fr_authstats.fas_sendfail++;
else
fr_authstats.fas_sendok++;
} else if (m) {
# if SOLARIS
error = fr_qin(fr_auth[i].fra_q, m);
# else /* SOLARIS */
ifq = &ipintrq;
if (IF_QFULL(ifq)) {
IF_DROP(ifq);
m_freem(m);
error = ENOBUFS;
} else {
IF_ENQUEUE(ifq, m);
schednetisr(NETISR_IP);
}
# endif /* SOLARIS */
if (error)
fr_authstats.fas_quefail++;
else
fr_authstats.fas_queok++;
} else
error = EINVAL;
# endif
# if SOLARIS
if (error)
error = EINVAL;
# else
/*
* If we experience an error which will result in the packet
* not being processed, make sure we advance to the next one.
*/
if (error == ENOBUFS) {
fr_authused--;
fr_auth[i].fra_index = -1;
fr_auth[i].fra_pass = 0;
if (i == fr_authstart) {
while (fr_auth[i].fra_index == -1) {
i++;
if (i == FR_NUMAUTH)
i = 0;
fr_authstart = i;
if (i == fr_authend)
break;
}
if (fr_authstart == fr_authend) {
fr_authnext = 0;
fr_authstart = fr_authend = 0;
}
}
}
# endif
SPL_X(s);
#endif /* _KERNEL */
break;
default :
error = EINVAL;
break;
}
return error;
}
#ifdef _KERNEL
/*
* Free all network buffer memory used to keep saved packets.
*/
void fr_authunload()
{
register int i;
register frauthent_t *fae, **faep;
mb_t *m;
MUTEX_ENTER(&ipf_auth);
for (i = 0; i < FR_NUMAUTH; i++) {
if ((m = fr_authpkts[i])) {
FREE_MB_T(m);
fr_authpkts[i] = NULL;
fr_auth[i].fra_index = -1;
}
}
for (faep = &fae_list; (fae = *faep); ) {
*faep = fae->fae_next;
KFREE(fae);
}
MUTEX_EXIT(&ipf_auth);
}
/*
* Slowly expire held auth records. Timeouts are set
* in expectation of this being called twice per second.
*/
void fr_authexpire()
{
register int i;
register frauth_t *fra;
register frauthent_t *fae, **faep;
mb_t *m;
#if !SOLARIS
int s;
#endif
SPL_NET(s);
MUTEX_ENTER(&ipf_auth);
for (i = 0, fra = fr_auth; i < FR_NUMAUTH; i++, fra++) {
if ((!--fra->fra_age) && (m = fr_authpkts[i])) {
FREE_MB_T(m);
fr_authpkts[i] = NULL;
fr_auth[i].fra_index = -1;
fr_authstats.fas_expire++;
fr_authused--;
}
}
for (faep = &fae_list; (fae = *faep); ) {
if (!--fra->fra_age) {
*faep = fae->fae_next;
KFREE(fae);
fr_authstats.fas_expire++;
} else
faep = &fae->fae_next;
}
MUTEX_EXIT(&ipf_auth);
SPL_X(s);
}
#endif

66
sys/netinet/ip_auth.h Normal file
View File

@ -0,0 +1,66 @@
/*
* Copyright (C) 1997 by Darren Reed & Guido Van Rooij.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* $Id: ip_auth.h,v 2.0.2.10 1997/10/29 12:14:07 darrenr Exp $
*
*/
#ifndef __IP_AUTH_H__
#define __IP_AUTH_H__
#define FR_NUMAUTH 32
typedef struct fr_authstat {
U_QUAD_T fas_hits;
U_QUAD_T fas_miss;
u_long fas_nospace;
u_long fas_added;
u_long fas_sendfail;
u_long fas_sendok;
u_long fas_queok;
u_long fas_quefail;
u_long fas_expire;
} fr_authstat_t;
typedef struct frauth {
int fra_age;
int fra_index;
u_32_t fra_pass;
fr_info_t fra_info;
#if SOLARIS
queue_t *fra_q;
#endif
} frauth_t;
typedef struct frauthent {
struct frentry fae_fr;
struct frauthent *fae_next;
u_long fae_age;
} frauthent_t;
extern frentry_t *ipauth;
extern struct fr_authstat fr_authstats;
extern int fr_defaultauthage;
extern int fr_authstart;
extern int fr_authend;
extern int fr_authsize;
extern int fr_authused;
extern int fr_checkauth __P((ip_t *, fr_info_t *));
extern void fr_authexpire __P((void));
extern void fr_authunload __P((void));
extern mb_t *fr_authpkts[];
#if defined(_KERNEL) && SOLARIS
extern int fr_newauth __P((mb_t *, fr_info_t *, ip_t *, qif_t *));
#else
extern int fr_newauth __P((mb_t *, fr_info_t *, ip_t *));
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__)
extern int fr_auth_ioctl __P((caddr_t, u_long, frentry_t *, frentry_t **));
#else
extern int fr_auth_ioctl __P((caddr_t, int, frentry_t *, frentry_t **));
#endif
#endif /* __IP_AUTH_H__ */

509
sys/netinet/ip_compat.h
View File

@ -1,12 +1,12 @@
/*
* (C)opyright 1993-1997 by Darren Reed.
* Copyright (C) 1993-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* @(#)ip_compat.h 1.8 1/14/96
* $Id: ip_compat.h,v 2.0.2.11 1997/05/04 05:29:02 darrenr Exp $
* $Id: ip_compat.h,v 2.0.2.31.2.4 1997/11/12 10:48:43 darrenr Exp $
*/
#ifndef __IP_COMPAT_H__
@ -17,6 +17,7 @@
# define __P(x) x
# else
# define __P(x) ()
# define const
# endif
#endif
@ -25,25 +26,51 @@
#endif
#if defined(_KERNEL) && !defined(KERNEL)
#define KERNEL
# define KERNEL
#endif
#if defined(KERNEL) && !defined(_KERNEL)
#define _KERNEL
# define _KERNEL
#endif
#if!defined(__KERNEL__) && defined(KERNEL)
# define __KERNEL__
#endif
#if defined(__SVR4) || defined(__svr4__)
#if defined(__SVR4) || defined(__svr4__) || defined(__sgi)
#define index strchr
# ifndef _KERNEL
# if !defined(_KERNEL)
# define bzero(a,b) memset(a,0,b)
# define bcmp memcmp
# define bcopy(a,b,c) memmove(b,a,c)
# endif
#endif
#if defined(__sgi) || defined(bsdi)
struct ether_addr {
u_char ether_addr_octet[6];
};
#endif
#ifdef __sgi
# ifdef IPFILTER_LKM
# define IPL_PRFX ipl
# define IPL_EXTERN(ep) ipl##ep
# else
# define IPL_PRFX ipfilter
# define IPL_EXTERN(ep) ipfilter##ep
# endif
#else
# define IPL_PRFX ipl
# define IPL_EXTERN(ep) ipl##ep
#endif
#ifdef linux
# include <sys/sysmacros.h>
#endif
#if SOLARIS
# define MTYPE(m) ((m)->b_datap->db_type)
# include <sys/ioccom.h>
# include <sys/sysmacros.h>
# include <sys/kmem.h>
/*
* because Solaris 2 defines these in two places :-/
*/
@ -59,12 +86,12 @@
# include <inet/ip.h>
# include <inet/ip_ire.h>
# undef _KERNEL
# else
# else /* _KERNEL */
# include <inet/common.h>
# include <inet/ip.h>
# include <inet/ip_ire.h>
# endif
#endif
# endif /* _KERNEL */
#endif /* SOLARIS */
#define IPMINLEN(i, h) ((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))
#ifndef IP_OFFMASK
@ -75,10 +102,26 @@
# define USE_QUAD_T
# define U_QUAD_T u_quad_t
# define QUAD_T quad_t
#else
#else /* BSD > 199306 */
# define U_QUAD_T u_long
# define QUAD_T long
#endif
#endif /* BSD > 199306 */
/*
* These operating systems already take care of the problem for us.
*/
#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__)
typedef u_int32_t u_32_t;
#else
/*
* Really, any arch where sizeof(long) != sizeof(int).
*/
# if defined(__alpha__) || defined(__alpha)
typedef unsigned int u_32_t;
# else
typedef unsigned long u_32_t;
# endif
#endif /* __NetBSD__ || __OpenBSD__ || __FreeBSD__ */
#ifndef MAX
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
@ -141,52 +184,39 @@
#define IPOPT_FINN 205 /* FINN */
#ifdef __FreeBSD__
# include <machine/spl.h>
#if defined(__FreeBSD__) && defined(KERNEL)
# if __FreeBSD__ < 3
# include <machine/spl.h>
# endif
# if defined(IPFILTER_LKM) && !defined(ACTUALLY_LKM_NOT_KERNEL)
# define ACTUALLY_LKM_NOT_KERNEL
# endif
#endif
#endif /* __FreeBSD__ && KERNEL */
/*
* Build some macros and #defines to enable the same code to compile anywhere
* Well, that's the idea, anyway :-)
*/
#if defined(_KERNEL) || defined(KERNEL)
#ifdef KERNEL
# if SOLARIS
# define MUTEX_ENTER(x) mutex_enter(x)
# define MUTEX_EXIT(x) mutex_exit(x)
# define MTOD(m,t) (t)((m)->b_rptr)
# define IRCOPY(a,b,c) copyin((a), (b), (c))
# define IWCOPY(a,b,c) copyout((a), (b), (c))
# else
# define MUTEX_ENTER(x) ;
# define MUTEX_EXIT(x) ;
# ifndef linux
# define MTOD(m,t) mtod(m,t)
# define IRCOPY(a,b,c) bcopy((a), (b), (c))
# define IWCOPY(a,b,c) bcopy((a), (b), (c))
# endif
# endif /* SOLARIS */
# ifdef sun
# if defined(__svr4__) || defined(__SVR4)
extern ill_t *get_unit __P((char *));
# define GETUNIT(n) get_unit((n))
# else
# include <sys/kmem_alloc.h>
# define GETUNIT(n) ifunit((n), IFNAMSIZ)
# endif
# else
# define GETUNIT(n) ifunit((n))
# endif /* sun */
# if defined(sun) && !defined(linux)
# define UIOMOVE(a,b,c,d) uiomove(a,b,c,d)
# define SLEEP(id, n) sleep((id), PZERO+1)
# define KFREE(x) kmem_free((char *)(x), sizeof(*(x)))
# define KFREES(x,s) kmem_free((char *)(x), (s))
# if SOLARIS
# define FREE_MB_T(m) freemsg(m)
# define SPL_NET(x) ;
# define SPL_IMP(x) ;
# undef SPL_X
# define SPL_X(x) ;
# ifdef sparc
# define ntohs(x) (x)
# define ntohl(x) (x)
# define htons(x) (x)
# define htonl(x) (x)
# endif /* sparc */
# define KMALLOC(a,b,c) (a) = (b)kmem_alloc((c), KM_NOSLEEP)
# define GET_MINOR(x) getminor(x)
typedef struct qif {
struct qif *qf_next;
ill_t *qf_ill;
@ -195,51 +225,90 @@ typedef struct qif {
void *qf_optr;
queue_t *qf_in;
queue_t *qf_out;
void *qf_wqinfo;
void *qf_rqinfo;
int (*qf_inp) __P((queue_t *, mblk_t *));
int (*qf_outp) __P((queue_t *, mblk_t *));
mblk_t *qf_m;
int qf_len;
struct qinit *qf_wqinfo;
struct qinit *qf_rqinfo;
struct qinit qf_wqinit;
struct qinit qf_rqinit;
mblk_t *qf_m; /* These three fields are for passing data up from */
queue_t *qf_q; /* fr_qin and fr_qout to the packet processing. */
int qf_off;
int qf_len; /* this field is used for in ipfr_fastroute */
char qf_name[8];
/*
* in case the ILL has disappeared...
*/
int qf_hl; /* header length */
} qif_t;
# define SPLNET(x) ;
# undef SPLX
# define SPLX(x) ;
# ifdef sparc
# define ntohs(x) (x)
# define ntohl(x) (x)
# define htons(x) (x)
# define htonl(x) (x)
# endif
extern ill_t *get_unit __P((char *));
# define GETUNIT(n) get_unit((n))
# else /* SOLARIS */
# if defined(__sgi)
# include <sys/ksynch.h>
# define IPF_LOCK_PL plhi
# include <sys/sema.h>
#undef kmutex_t
typedef struct {
lock_t *l;
int pl;
} kmutex_t;
# define MUTEX_ENTER(x) (x)->pl = LOCK((x)->l, IPF_LOCK_PL);
# define MUTEX_EXIT(x) UNLOCK((x)->l, (x)->pl);
# else /* __sgi */
# define MUTEX_ENTER(x) ;
# define MUTEX_EXIT(x) ;
# endif /* __sgi */
# ifndef linux
# define FREE_MB_T(m) m_freem(m)
# define MTOD(m,t) mtod(m,t)
# define IRCOPY(a,b,c) bcopy((a), (b), (c))
# define IWCOPY(a,b,c) bcopy((a), (b), (c))
# endif /* !linux */
# endif /* SOLARIS */
# ifdef sun
# if !SOLARIS
# include <sys/kmem_alloc.h>
# define GETUNIT(n) ifunit((n), IFNAMSIZ)
# endif
# else
# ifndef linux
# define GETUNIT(n) ifunit((n))
# endif
# endif /* sun */
# if defined(sun) && !defined(linux) || defined(__sgi)
# define UIOMOVE(a,b,c,d) uiomove((caddr_t)a,b,c,d)
# define SLEEP(id, n) sleep((id), PZERO+1)
# define WAKEUP(id) wakeup(id)
# define KFREE(x) kmem_free((char *)(x), sizeof(*(x)))
# define KFREES(x,s) kmem_free((char *)(x), (s))
# if !SOLARIS
extern void m_copydata __P((struct mbuf *, int, int, caddr_t));
extern void m_copyback __P((struct mbuf *, int, int, caddr_t));
# endif
# ifdef __sgi
# include <sys/kmem.h>
# include <sys/ddi.h>
# define KMALLOC(a,b,c) (a) = (b)kmem_alloc((c), KM_NOSLEEP)
# define GET_MINOR(x) getminor(x)
# else
# define KMALLOC(a,b,c) (a) = (b)new_kmem_alloc((c), KMEM_NOSLEEP)
# endif /* __svr4__ */
# if !SOLARIS
# define KMALLOC(a,b,c) (a) = (b)new_kmem_alloc((c), KMEM_NOSLEEP)
# endif /* SOLARIS */
# endif /* __sgi */
# endif /* sun && !linux */
# ifndef GET_MINOR
# define GET_MINOR(x) minor(x)
# endif
# if BSD >= 199306 || defined(__FreeBSD__)
# if (BSD >= 199306) || defined(__FreeBSD__)
# include <vm/vm.h>
# if !defined(__FreeBSD__) || (defined (__FreeBSD__) && __FreeBSD__>=3)
# include <vm/vm_extern.h>
# include <sys/proc.h>
extern vm_map_t kmem_map;
# else
# else /* !__FreeBSD__ || (__FreeBSD__ && __FreeBSD__>=3) */
# include <vm/vm_kern.h>
# endif /* __FreeBSD__ */
/*
# define KMALLOC(a,b,c) (a) = (b)kmem_alloc(kmem_map, (c))
# define KFREE(x) kmem_free(kmem_map, (vm_offset_t)(x), \
sizeof(*(x)))
# define KFREES(x,s) kmem_free(kmem_map, (vm_offset_t)(x), (s))
*/
# endif /* !__FreeBSD__ || (__FreeBSD__ && __FreeBSD__>=3) */
# ifdef M_PFIL
# define KMALLOC(a, b, c) MALLOC((a), b, (c), M_PFIL, M_NOWAIT)
# define KFREE(x) FREE((x), M_PFIL)
@ -248,26 +317,32 @@ extern vm_map_t kmem_map;
# define KMALLOC(a, b, c) MALLOC((a), b, (c), M_TEMP, M_NOWAIT)
# define KFREE(x) FREE((x), M_TEMP)
# define KFREES(x,s) FREE((x), M_TEMP)
# endif
# endif /* M_PFIL */
# define UIOMOVE(a,b,c,d) uiomove(a,b,d)
# define SLEEP(id, n) tsleep((id), PPAUSE|PCATCH, n, 0)
# define WAKEUP(id) wakeup(id)
# endif /* BSD */
# if defined(NetBSD1_0) && (NetBSD1_0 > 1)
# define SPLNET(x) x = splsoftnet()
# if defined(NetBSD) && NetBSD <= 1991011 && NetBSD >= 199407
# define SPL_NET(x) x = splsoftnet()
# define SPL_X(x) (void) splx(x)
# else
# if !SOLARIS
# define SPLNET(x) x = splnet()
# define SPLX(x) (void) splx(x)
# if !SOLARIS && !defined(linux)
# define SPL_IMP(x) x = splimp()
# define SPL_NET(x) x = splnet()
# define SPL_X(x) (void) splx(x)
# endif
# endif
# endif /* NetBSD && NetBSD <= 1991011 && NetBSD >= 199407 */
# define PANIC(x,y) if (x) panic y
#else
#else /* KERNEL */
# define SLEEP(x,y) ;
# define WAKEUP(x) ;
# define PANIC(x,y) ;
# define MUTEX_ENTER(x) ;
# define MUTEX_EXIT(x) ;
# define SPLNET(x) ;
# undef SPLX
# define SPLX(x) ;
# define SPL_NET(x) ;
# define SPL_IMP(x) ;
# undef SPL_X
# define SPL_X(x) ;
# define KMALLOC(a,b,c) (a) = (b)malloc(c)
# define KFREE(x) free(x)
# define KFREES(x,s) free(x)
@ -276,25 +351,187 @@ extern vm_map_t kmem_map;
# define IWCOPY(a,b,c) bcopy((a), (b), (c))
#endif /* KERNEL */
#ifdef linux
# define ICMP_UNREACH ICMP_DEST_UNREACH
# define ICMP_SOURCEQUENCH ICMP_SOURCE_QUENCH
# define ICMP_TIMXCEED ICMP_TIME_EXCEEDED
# define ICMP_PARAMPROB ICMP_PARAMETERPROB
#if SOLARIS
typedef mblk_t mb_t;
#else
# ifdef linux
typedef struct sk_buff mb_t;
# else
typedef struct mbuf mb_t;
# endif
#endif /* SOLARIS */
#if defined(linux) || defined(__sgi)
/*
* These #ifdef's are here mainly for linux, but who knows, they may
* not be in other places or maybe one day linux will grow up and some
* of these will turn up there too.
*/
#ifndef ICMP_UNREACH
# define ICMP_UNREACH ICMP_DEST_UNREACH
#endif
#ifndef ICMP_SOURCEQUENCH
# define ICMP_SOURCEQUENCH ICMP_SOURCE_QUENCH
#endif
#ifndef ICMP_TIMXCEED
# define ICMP_TIMXCEED ICMP_TIME_EXCEEDED
#endif
#ifndef ICMP_PARAMPROB
# define ICMP_PARAMPROB ICMP_PARAMETERPROB
#endif
#ifndef ICMP_TSTAMP
# define ICMP_TSTAMP ICMP_TIMESTAMP
#endif
#ifndef ICMP_TSTAMPREPLY
# define ICMP_TSTAMPREPLY ICMP_TIMESTAMPREPLY
#endif
#ifndef ICMP_IREQ
# define ICMP_IREQ ICMP_INFO_REQUEST
#endif
#ifndef ICMP_IREQREPLY
# define ICMP_IREQREPLY ICMP_INFO_REPLY
#endif
#ifndef ICMP_MASKREQ
# define ICMP_MASKREQ ICMP_ADDRESS
#endif
#ifndef ICMP_MASKREPLY
# define ICMP_MASKREPLY ICMP_ADDRESSREPLY
#endif
#ifndef IPVERSION
# define IPVERSION 4
#endif
#ifndef IPOPT_MINOFF
# define IPOPT_MINOFF 4
#endif
#ifndef IPOPT_COPIED
# define IPOPT_COPIED(x) ((x)&0x80)
#endif
#ifndef IPOPT_EOL
# define IPOPT_EOL 0
#endif
#ifndef IPOPT_NOP
# define IPOPT_NOP 1
#endif
#ifndef IP_MF
# define IP_MF ((u_short)0x2000)
#endif
#ifndef ETHERTYPE_IP
# define ETHERTYPE_IP ((u_short)0x0800)
#endif
#ifndef TH_FIN
# define TH_FIN 0x01
#endif
#ifndef TH_SYN
# define TH_SYN 0x02
#endif
#ifndef TH_RST
# define TH_RST 0x04
#endif
#ifndef TH_PUSH
# define TH_PUSH 0x08
#endif
#ifndef TH_ACK
# define TH_ACK 0x10
#endif
#ifndef TH_URG
# define TH_URG 0x20
#endif
#ifndef IPOPT_EOL
# define IPOPT_EOL 0
#endif
#ifndef IPOPT_NOP
# define IPOPT_NOP 1
#endif
#ifndef IPOPT_RR
# define IPOPT_RR 7
#endif
#ifndef IPOPT_TS
# define IPOPT_TS 68
#endif
#ifndef IPOPT_SECURITY
# define IPOPT_SECURITY 130
#endif
#ifndef IPOPT_LSRR
# define IPOPT_LSRR 131
#endif
#ifndef IPOPT_SATID
# define IPOPT_SATID 136
#endif
#ifndef IPOPT_SSRR
# define IPOPT_SSRR 137
#endif
#ifndef IPOPT_SECUR_UNCLASS
# define IPOPT_SECUR_UNCLASS ((u_short)0x0000)
#endif
#ifndef IPOPT_SECUR_CONFID
# define IPOPT_SECUR_CONFID ((u_short)0xf135)
#endif
#ifndef IPOPT_SECUR_EFTO
# define IPOPT_SECUR_EFTO ((u_short)0x789a)
#endif
#ifndef IPOPT_SECUR_MMMM
# define IPOPT_SECUR_MMMM ((u_short)0xbc4d)
#endif
#ifndef IPOPT_SECUR_RESTR
# define IPOPT_SECUR_RESTR ((u_short)0xaf13)
#endif
#ifndef IPOPT_SECUR_SECRET
# define IPOPT_SECUR_SECRET ((u_short)0xd788)
#endif
#ifndef IPOPT_SECUR_TOPSECRET
# define IPOPT_SECUR_TOPSECRET ((u_short)0x6bc5)
#endif
#ifndef IPOPT_OLEN
# define IPOPT_OLEN 1
#endif
#endif /* linux || __sgi */
#ifdef linux
/*
* TCP States
*/
#define TCPS_CLOSED 0 /* closed */
#define TCPS_LISTEN 1 /* listening for connection */
#define TCPS_SYN_SENT 2 /* active, have sent syn */
#define TCPS_SYN_RECEIVED 3 /* have send and received syn */
/* states < TCPS_ESTABLISHED are those where connections not established */
#define TCPS_ESTABLISHED 4 /* established */
#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
/* states > TCPS_CLOSE_WAIT are those where user has closed */
#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
#define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
/*
* file flags.
*/
#define FWRITE WRITE
#define FREAD READ
/*
* mbuf related problems.
*/
#define mtod(m,t) (t)((m)->data)
#define m_len len
#define m_next next
#define IP_DF 0x8000
typedef struct {
__u16 th_sport;
__u16 th_dport;
__u32 th_seq;
__u32 th_ack;
__u8 th_x;
# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) ||\
defined(vax)
__u8 th_res:4;
__u8 th_off:4;
#else
__u8 th_off:4;
__u8 th_res:4;
#endif
__u8 th_flags;
__u16 th_win;
__u16 th_sum;
@ -305,7 +542,7 @@ typedef struct {
__u16 uh_sport;
__u16 uh_dport;
__u16 uh_ulen;
__u16 uh_sun;
__u16 uh_sum;
} udphdr_t;
typedef struct {
@ -331,7 +568,7 @@ typedef struct {
/*
* Structure of an icmp header.
*/
struct icmp {
typedef struct icmp {
u_char icmp_type; /* type of message, see below */
u_char icmp_code; /* type sub code */
u_short icmp_cksum; /* ones complement cksum of struct */
@ -368,8 +605,10 @@ struct icmp {
# define icmp_ip icmp_dun.id_ip.idi_ip
# define icmp_mask icmp_dun.id_mask
# define icmp_data icmp_dun.id_data
};
} icmphdr_t;
# ifndef LINUX_IPOVLY
# define LINUX_IPOVLY
struct ipovly {
caddr_t ih_next, ih_prev; /* for protocol sequence q's */
u_char ih_x1; /* (unused) */
@ -378,36 +617,98 @@ struct ipovly {
struct in_addr ih_src; /* source internet address */
struct in_addr ih_dst; /* destination internet address */
};
# endif
# define SPLX(x) (void)
# define SPLNET(x) (void)
typedef struct {
__u8 ether_dhost[6];
__u8 ether_shost[6];
__u16 ether_type;
} ether_header_t;
# define bcopy(a,b,c) memmove(b,a,c)
# define bcmp(a,b,c) memcmp(a,b,c)
typedef struct uio {
int uio_resid;
int uio_rw;
caddr_t uio_buf;
} uio_t;
# define UNITNAME(n) dev_get((n))
# define ifnet device
# define UIO_READ 0
# define UIO_WRITE 1
# define UIOMOVE(a, b, c, d) uiomove(a,b,c,d)
# define KMALLOC(a,b,c) (a) = (b)kmalloc((c), GFP_ATOMIC)
# define KFREE(x) kfree_s((x), sizeof(*(x)))
# define KFREES(x,s) kfree_s((x), (s))
# define IRCOPY(a,b,c) { \
error = verify_area(VERIFY_READ, \
(b) ,sizeof((b))); \
/*
* For masking struct ifnet onto struct device
*/
# define if_name name
# ifdef KERNEL
# define GETUNIT(x) dev_get(x)
# define FREE_MB_T(m) kfree_skb(m, FREE_WRITE)
# define uniqtime do_gettimeofday
# undef INT_MAX
# undef UINT_MAX
# undef LONG_MAX
# undef ULONG_MAX
# include <linux/netdevice.h>
# define SPL_X(x)
# define SPL_NET(x)
# define SPL_IMP(x)
# define bcmp(a,b,c) memcmp(a,b,c)
# define bcopy(a,b,c) memcpy(b,a,c)
# define bzero(a,c) memset(a,0,c)
# define UNITNAME(n) dev_get((n))
# define KMALLOC(a,b,c) (a) = (b)kmalloc((c), GFP_ATOMIC)
# define KFREE(x) kfree_s((x), sizeof(*(x)))
# define KFREES(x,s) kfree_s((x), (s))
# define IRCOPY(a,b,c) { \
error = verify_area(VERIFY_READ, (a) ,(c)); \
if (!error) \
memcpy_fromfs((b), (a), (c)); \
}
# define IWCOPY(a,b,c) { \
error = verify_area(VERIFY_WRITE, \
(b) ,sizeof((b))); \
# define IWCOPY(a,b,c) { \
error = verify_area(VERIFY_WRITE, (b), (c)); \
if (!error) \
memcpy_tofs((b), (a), (c)); \
}
# else
# define __KERNEL__
# undef INT_MAX
# undef UINT_MAX
# undef LONG_MAX
# undef ULONG_MAX
# include <linux/netdevice.h>
# undef __KERNEL__
# endif
# define ifnet device
#else
typedef struct tcphdr tcphdr_t;
typedef struct udphdr udphdr_t;
typedef struct icmp icmphdr_t;
typedef struct ip ip_t;
typedef struct ether_header ether_header_t;
#endif /* linux */
#if defined(hpux) || defined(linux)
struct ether_addr {
char ether_addr_octet[6];
};
#endif
/*
* XXX - This is one of those *awful* hacks which nobody likes
*/
#ifdef ultrix
#define A_A
#else
#define A_A &
#endif
#ifndef ICMP_ROUTERADVERT
# define ICMP_ROUTERADVERT 9
#endif
#ifndef ICMP_ROUTERSOLICIT
# define ICMP_ROUTERSOLICIT 10
#endif
#endif /* __IP_COMPAT_H__ */

658
sys/netinet/ip_fil.c
View File

File diff suppressed because it is too large Load Diff

288
sys/netinet/ip_fil.h
View File

@ -1,17 +1,25 @@
/*
* (C)opyright 1993-1997 by Darren Reed.
* Copyright (C) 1993-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* @(#)ip_fil.h 1.35 6/5/96
* $Id: ip_fil.h,v 2.0.2.13 1997/05/24 07:41:55 darrenr Exp $
* $Id: ip_fil.h,v 2.0.2.39.2.4 1997/11/12 10:50:02 darrenr Exp $
*/
#ifndef __IP_FIL_H__
#define __IP_FIL_H__
/*
* Pathnames for various IP Filter control devices. Used by LKM
* and userland, so defined here.
*/
#define IPNAT_NAME "/dev/ipnat"
#define IPSTATE_NAME "/dev/ipstate"
#define IPAUTH_NAME "/dev/ipauth"
#ifndef SOLARIS
#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
#endif
@ -45,6 +53,9 @@
#define SIOCFRSYN _IOW('r', 73, u_int)
#define SIOCFRZST _IOWR('r', 74, struct friostat)
#define SIOCZRLST _IOWR('r', 75, struct frentry)
#define SIOCAUTHW _IOWR('r', 76, struct fr_info)
#define SIOCAUTHR _IOWR('r', 77, struct fr_info)
#define SIOCATHST _IOWR('r', 78, struct fr_authstat)
#else
#define SIOCADAFR _IOW(r, 60, struct frentry)
#define SIOCRMAFR _IOW(r, 61, struct frentry)
@ -62,6 +73,9 @@
#define SIOCFRSYN _IOW(r, 73, u_int)
#define SIOCFRZST _IOWR(r, 74, struct friostat)
#define SIOCZRLST _IOWR(r, 75, struct frentry)
#define SIOCAUTHW _IOWR(r, 76, struct fr_info)
#define SIOCAUTHR _IOWR(r, 77, struct fr_info)
#define SIOCATHST _IOWR(r, 78, struct fr_authstat)
#endif
#define SIOCADDFR SIOCADAFR
#define SIOCDELFR SIOCRMAFR
@ -75,7 +89,7 @@ typedef struct fr_ip {
u_char fi_p;
struct in_addr fi_src;
struct in_addr fi_dst;
u_long fi_optmsk; /* bitmask composed from IP options */
u_32_t fi_optmsk; /* bitmask composed from IP options */
u_short fi_secmsk; /* bitmask composed from IP security options */
u_short fi_auth;
} fr_ip_t;
@ -87,20 +101,30 @@ typedef struct fr_ip {
typedef struct fr_info {
struct fr_ip fin_fi;
void *fin_ifp;
u_short fin_data[2];
u_short fin_out;
u_char fin_tcpf;
u_char fin_icode;
u_short fin_rule;
u_short fin_hlen;
u_char fin_tcpf;
u_char fin_icode; /* From here on is packet specific */
u_short fin_rule;
u_short fin_group;
u_short fin_dlen;
char *fin_dp; /* start of data past IP header */
u_short fin_id;
void *fin_ifp;
struct frentry *fin_fr;
char *fin_dp; /* start of data past IP header */
void *fin_mp;
} fr_info_t;
#define FI_CSIZE (sizeof(struct fr_ip) + 11)
/*
* Size for compares on fr_info structures
*/
#define FI_CSIZE (sizeof(struct fr_ip) + sizeof(u_short) * 4 + \
sizeof(u_char))
/*
* Size for copying cache fr_info structure
*/
#define FI_COPYSIZE (sizeof(fr_info_t) - sizeof(void *) * 2)
typedef struct frdest {
void *fd_ifp;
@ -110,9 +134,13 @@ typedef struct frdest {
typedef struct frentry {
struct frentry *fr_next;
struct ifnet *fr_ifa;
u_short fr_group; /* group to which this rule belongs */
u_short fr_grhead; /* group # which this rule starts */
struct frentry *fr_grp;
int fr_ref; /* reference count - for grouping */
void *fr_ifa;
/*
* There are only incremented when a packet matches this rule and
* These are only incremented when a packet matches this rule and
* it is the last match
*/
U_QUAD_T fr_hits;
@ -135,8 +163,9 @@ typedef struct frentry {
u_short fr_sport;
u_short fr_stop; /* top port for <> and >< */
u_short fr_dtop; /* top port for <> and >< */
u_long fr_flags; /* per-rule flags && options (see below) */
int (*fr_func) __P((int, struct ip *, fr_info_t *)); /* call this function */
u_32_t fr_flags; /* per-rule flags && options (see below) */
int fr_skip; /* # of rules to skip */
int (*fr_func) __P((int, ip_t *, fr_info_t *)); /* call this function */
char fr_icode; /* return ICMP code */
char fr_ifname[IFNAMSIZ];
struct frdest fr_tif; /* "to" interface */
@ -159,10 +188,10 @@ typedef struct frentry {
/*
* fr_flags
*/
#define FR_BLOCK 0x00001
#define FR_PASS 0x00002
#define FR_OUTQUE 0x00004
#define FR_INQUE 0x00008
#define FR_BLOCK 0x00001 /* do not allow packet to pass */
#define FR_PASS 0x00002 /* allow packet to pass */
#define FR_OUTQUE 0x00004 /* outgoing packets */
#define FR_INQUE 0x00008 /* ingoing packets */
#define FR_LOG 0x00010 /* Log */
#define FR_LOGB 0x00011 /* Log-fail */
#define FR_LOGP 0x00012 /* Log-pass */
@ -170,7 +199,7 @@ typedef struct frentry {
#define FR_LOGFIRST 0x00040 /* Log the first byte if state held */
#define FR_RETRST 0x00080 /* Return TCP RST packet - reset connection */
#define FR_RETICMP 0x00100 /* Return ICMP unreachable packet */
#define FR_NOMATCH 0x00200
#define FR_NOMATCH 0x00200 /* no match occured */
#define FR_ACCOUNT 0x00400 /* count packet bytes */
#define FR_KEEPFRAG 0x00800 /* keep fragment information */
#define FR_KEEPSTATE 0x01000 /* keep `connection' state information */
@ -182,10 +211,20 @@ typedef struct frentry {
#define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */
#define FR_NOTSRCIP 0x80000 /* not the src IP# */
#define FR_NOTDSTIP 0x100000 /* not the dst IP# */
#define FR_AUTH 0x200000 /* use authentication */
#define FR_PREAUTH 0x400000 /* require preauthentication */
#define FR_LOGMASK (FR_LOG|FR_LOGP|FR_LOGB)
/*
* recognized flags for SIOCGETFF and SIOCSETFF
* These correspond to #define's for FI_* and are stored in fr_flags
*/
#define FF_OPTIONS 0x01000000
#define FF_TCPUDP 0x02000000
#define FF_FRAG 0x04000000
#define FF_SHORT 0x08000000
/*
* recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags
*/
#define FF_LOGPASS 0x10000000
#define FF_LOGBLOCK 0x20000000
@ -220,6 +259,7 @@ typedef struct filterstats {
u_long fr_bads; /* bad attempts to allocate packet state */
u_long fr_ads; /* new packet state kept */
u_long fr_chit; /* cached hit */
u_long fr_tcpbad; /* TCP checksum check failures */
u_long fr_pull[2]; /* good and bad pullup attempts */
#if SOLARIS
u_long fr_bad; /* bad IP packets to the filter */
@ -237,34 +277,59 @@ typedef struct friostat {
struct frentry *f_fout[2];
struct frentry *f_acctin[2];
struct frentry *f_acctout[2];
struct frentry *f_auth;
u_long f_froute[2];
int f_active;
} friostat_t;
typedef struct optlist {
typedef struct optlist {
u_short ol_val;
int ol_bit;
int ol_bit;
} optlist_t;
/*
* Log structure. Each packet header logged is prepended by one of these,
* minimize size to make most effective use of log space which should
* (ideally) be a muliple of the most common log entry size.
* Group list structure.
*/
typedef struct ipl_ci {
u_long sec;
u_long usec;
u_char hlen;
u_char plen;
u_short rule; /* assume never more than 64k rules, total */
#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603))
u_long flags;
u_char ifname[IFNAMSIZ]; /* = 32 bytes */
typedef struct frgroup {
u_short fg_num;
struct frgroup *fg_next;
struct frentry *fg_head;
struct frentry **fg_start;
} frgroup_t;
/*
* Log structure. Each packet header logged is prepended by one of these.
* Following this in the log records read from the device will be an ipflog
* structure which is then followed by any packet data.
*/
typedef struct iplog {
u_long ipl_magic;
u_long ipl_sec;
u_long ipl_usec;
u_int ipl_len;
u_int ipl_count;
size_t ipl_dsize;
struct iplog *ipl_next;
} iplog_t;
#define IPL_MAGIC 0x49504c4d /* 'IPLM' */
typedef struct ipflog {
#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
(defined(OpenBSD) && (OpenBSD >= 199603))
u_char fl_ifname[IFNAMSIZ];
#else
u_long flags;
u_int unit;
u_char ifname[4]; /* = 24 bytes */
u_int fl_unit;
u_char fl_ifname[4];
#endif
} ipl_ci_t;
u_char fl_plen; /* extra data after hlen */
u_char fl_hlen; /* length of IP headers saved */
u_short fl_rule; /* assume never more than 64k rules, total */
u_short fl_group;
u_32_t fl_flags;
} ipflog_t;
#ifndef ICMP_UNREACH_FILTER
@ -275,15 +340,15 @@ typedef struct ipl_ci {
#define IPF_LOGGING 0
#endif
#ifndef IPF_DEFAULT_PASS
#define IPF_DEFAULT_PASS 0
#define IPF_DEFAULT_PASS FR_PASS
#endif
#define IPMINLEN(i, h) ((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))
#define IPLLOGSIZE 8192
/*
* Device filenames. Use ipf on Solaris2 because ipl is already a name used
* by something else.
* Device filenames for reading log information. Use ipf on Solaris2 because
* ipl is already a name used by something else.
*/
#ifndef IPL_NAME
# if SOLARIS
@ -292,11 +357,15 @@ typedef struct ipl_ci {
# define IPL_NAME "/dev/ipl"
# endif
#endif
#define IPL_NAT "/dev/ipnat"
#define IPL_STATE "/dev/ipstate"
#define IPL_NAT IPNAT_NAME
#define IPL_STATE IPSTATE_NAME
#define IPL_AUTH IPAUTH_NAME
#define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */
#define IPL_LOGNAT 1
#define IPL_LOGSTATE 2
#define IPL_LOGAUTH 3
#define IPL_LOGMAX 3
#if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \
(__FreeBSD_version >= 220000)
@ -304,78 +373,145 @@ typedef struct ipl_ci {
#endif
#ifndef _KERNEL
extern int fr_check __P((struct ip *, int, struct ifnet *, int, char *));
extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *,
int, char *));
extern int send_reset __P((struct ip *, struct ifnet *));
extern int icmp_error __P((struct ip *, struct ifnet *));
extern void ipllog __P((void));
extern void ipfr_fastroute __P((struct ip *, fr_info_t *, frdest_t *));
extern int fr_check __P((ip_t *, int, void *, int, mb_t **));
extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **));
extern int send_reset __P((ip_t *, struct ifnet *));
extern int icmp_error __P((ip_t *, struct ifnet *));
extern int ipf_log __P((void));
extern void ipfr_fastroute __P((ip_t *, fr_info_t *, frdest_t *));
extern struct ifnet *get_unit __P((char *));
# define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
# if defined(__NetBSD__) || defined(__OpenBSD__)
extern int iplioctl __P((dev_t, u_long, caddr_t, int));
# else
extern int iplioctl __P((dev_t, int, caddr_t, int));
# endif
extern int iplopen __P((dev_t, int));
extern int iplclose __P((dev_t, int));
#else /* #ifndef _KERNEL */
# if defined(__NetBSD__) && defined(PFIL_HOOKS)
extern int ipfilterattach __P((int));
# endif
extern int iplattach __P((void));
extern int ipldetach __P((void));
extern int ipl_enable __P((void));
extern int ipl_disable __P((void));
extern void ipflog_init __P((void));
extern int ipflog_clear __P((int));
extern int ipflog_read __P((int, struct uio *));
extern int ipflog __P((u_int, ip_t *, fr_info_t *, mb_t *));
extern int ipllog __P((int, u_long, void **, size_t *, int *, int));
# if SOLARIS
extern int fr_check __P((struct ip *, int, struct ifnet *, int, qif_t *,
queue_t *, mblk_t **));
extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *,
int, qif_t *, queue_t *, mblk_t *));
extern int icmp_error __P((queue_t *, ip_t *, int, int, qif_t *,
extern int fr_check __P((ip_t *, int, void *, int, qif_t *, mb_t **));
extern int (*fr_checkp) __P((ip_t *, int, void *,
int, qif_t *, mb_t **));
extern int icmp_error __P((ip_t *, int, int, qif_t *,
struct in_addr));
extern int iplioctl __P((dev_t, int, int, int, cred_t *, int *));
extern int iplopen __P((dev_t *, int, int, cred_t *));
extern int iplclose __P((dev_t, int, int, cred_t *));
extern int ipfsync __P((void));
extern int send_reset __P((ip_t *, qif_t *));
extern int ipfr_fastroute __P((qif_t *, ip_t *, mblk_t *, mblk_t **,
fr_info_t *, frdest_t *));
extern void copyin_mblk __P((mblk_t *, int, int, char *));
extern void copyout_mblk __P((mblk_t *, int, int, char *));
extern int fr_qin __P((queue_t *, mblk_t *));
extern int fr_qout __P((queue_t *, mblk_t *));
# ifdef IPFILTER_LOG
extern int iplread __P((dev_t, struct uio *, cred_t *));
# endif
extern u_short fr_tcpsum __P((mblk_t *, ip_t *, tcphdr_t *));
# else /* SOLARIS */
extern int fr_check __P((struct ip *, int, struct ifnet *, int,
struct mbuf **));
extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int,
struct mbuf **));
extern int fr_check __P((ip_t *, int, void *, int, mb_t **));
extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **));
extern int send_reset __P((struct tcpiphdr *));
extern int ipllog __P((u_int, int, struct ip *, fr_info_t *, struct mbuf *));
extern void ipfr_fastroute __P((struct mbuf *, fr_info_t *, frdest_t *));
# ifdef IPFILTER_LKM
extern void ipfr_fastroute __P((mb_t *, fr_info_t *, frdest_t *));
extern size_t mbufchainlen __P((mb_t *));
# ifdef __sgi
# include <sys/cred.h>
extern int iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *));
extern int iplopen __P((dev_t *, int, int, cred_t *));
extern int iplclose __P((dev_t, int, int, cred_t *));
extern int iplread __P((dev_t, struct uio *, cred_t *));
extern int ipfsync __P((void));
extern int ipfilter_sgi_attach __P((void));
extern void ipfilter_sgi_detach __P((void));
extern void ipfilter_sgi_intfsync __P((void));
# else
# ifdef IPFILTER_LKM
extern int iplidentify __P((char *));
# endif
extern u_short fr_tcpsum __P((struct mbuf *, ip_t *, tcphdr_t *));
# if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \
# endif
# if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \
(NetBSD >= 199511)
# ifdef __NetBSD__
extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
# else
extern int iplioctl __P((dev_t, int, caddr_t, int, struct proc *));
# endif
extern int iplopen __P((dev_t, int, int, struct proc *));
extern int iplclose __P((dev_t, int, int, struct proc *));
# else
# else
# if defined(__OpenBSD__)
extern int iplioctl __P((dev_t, u_long, caddr_t, int));
# else /* __OpenBSD__ */
# ifndef linux
extern int iplioctl __P((dev_t, int, caddr_t, int));
# else
extern int iplioctl(struct inode *, struct file *, u_int, u_long);
# endif
# endif /* __OpenBSD__ */
# ifndef linux
extern int iplopen __P((dev_t, int));
extern int iplclose __P((dev_t, int));
# endif /* (_BSDI_VERSION >= 199510) */
# ifdef IPFILTER_LOG
# else
extern int iplopen __P((struct inode *, struct file *));
extern void iplclose __P((struct inode *, struct file *));
# endif /* !linux */
# endif /* (_BSDI_VERSION >= 199510) */
# if BSD >= 199306
extern int iplread __P((dev_t, struct uio *, int));
# else
# ifndef linux
extern int iplread __P((dev_t, struct uio *));
# else
extern int iplread(struct inode *, struct file *, char *, int);
# endif /* !linux */
# endif /* BSD >= 199306 */
# else
# define iplread noread
# endif /* IPFILTER_LOG */
# endif /* __ sgi */
# endif /* SOLARIS */
#endif /* #ifndef _KERNEL */
/*
* Post NetBSD 1.2 has the PFIL interface for packet filters. This turns
* on those hooks. We don't need any special mods in non-IP Filter code
* with this!
*/
#if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \
(defined(NetBSD1_2) && NetBSD1_2 > 1)
# define NETBSD_PF
#endif
extern int ipldetach __P((void));
extern u_short fr_tcpsum __P((mb_t *, ip_t *, tcphdr_t *));
#define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
extern int fr_scanlist __P((int, ip_t *, fr_info_t *, void *));
extern u_short ipf_cksum __P((u_short *, int));
extern int fr_copytolog __P((int, char *, int));
extern void frflush __P((int, caddr_t));
extern frgroup_t *fr_addgroup __P((u_short, frentry_t *, int, int));
extern frgroup_t *fr_findgroup __P((u_short, u_32_t, int, int, frgroup_t ***));
extern void fr_delgroup __P((u_short, u_32_t, int, int));
extern int ipl_unreach;
extern int ipl_inited;
extern u_long ipl_frouteok[2];
extern int fr_pass;
extern int fr_flags;
extern int fr_active;
extern fr_info_t frcache[];
extern char *iplh[3], *iplt[3];
extern char iplbuf[3][IPLLOGSIZE];
extern int iplused[3];
extern fr_info_t frcache[2];
#ifdef IPFILTER_LOG
extern iplog_t **iplh[IPL_LOGMAX+1], *iplt[IPL_LOGMAX+1];
extern int iplused[IPL_LOGMAX + 1];
#endif
extern struct frentry *ipfilter[2][2], *ipacct[2][2];
extern struct frgroup *ipfgroups[3][2];
extern struct filterstats frstats[];
#endif /* __IP_FIL_H__ */

105
sys/netinet/ip_frag.c
View File

@ -1,13 +1,13 @@
/*
* (C)opyright 1993,1994,1995 by Darren Reed.
* Copyright (C) 1993-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
#if !defined(lint) && defined(LIBC_SCCS)
static char sccsid[] = "@(#)ip_frag.c 1.11 3/24/96 (C) 1993-1995 Darren Reed";
static char rcsid[] = "$Id: ip_frag.c,v 2.0.2.10 1997/05/24 07:36:23 darrenr Exp $";
#if !defined(lint)
static const char sccsid[] = "@(#)ip_frag.c 1.11 3/24/96 (C) 1993-1995 Darren Reed";
static const char rcsid[] = "@(#)$Id: ip_frag.c,v 2.0.2.19.2.1 1997/11/12 10:50:21 darrenr Exp $";
#endif
#if !defined(_KERNEL) && !defined(KERNEL)
@ -26,13 +26,17 @@ static char rcsid[] = "$Id: ip_frag.c,v 2.0.2.10 1997/05/24 07:36:23 darrenr Exp
#include <sys/ioctl.h>
#endif
#include <sys/uio.h>
#ifndef linux
#include <sys/protosw.h>
#endif
#include <sys/socket.h>
#ifdef _KERNEL
#if defined(_KERNEL) && !defined(linux)
# include <sys/systm.h>
#endif
#if !defined(__SVR4) && !defined(__svr4__)
# include <sys/mbuf.h>
# ifndef linux
# include <sys/mbuf.h>
# endif
#else
# include <sys/byteorder.h>
# include <sys/dditypes.h>
@ -48,27 +52,30 @@ static char rcsid[] = "$Id: ip_frag.c,v 2.0.2.10 1997/05/24 07:36:23 darrenr Exp
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#ifndef linux
#include <netinet/ip_var.h>
#endif
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/tcpip.h>
#include <netinet/ip_icmp.h>
#include "netinet/ip_compat.h"
#include <netinet/tcpip.h>
#include "netinet/ip_fil.h"
#include "netinet/ip_proxy.h"
#include "netinet/ip_nat.h"
#include "netinet/ip_frag.h"
#include "netinet/ip_state.h"
#include "netinet/ip_auth.h"
ipfr_t *ipfr_heads[IPFT_SIZE];
ipfr_t *ipfr_nattab[IPFT_SIZE];
ipfrstat_t ipfr_stats;
u_long ipfr_inuse = 0,
int ipfr_inuse = 0,
fr_ipfrttl = 120; /* 60 seconds */
#ifdef _KERNEL
extern int ipfr_timer_id;
#endif
#if SOLARIS && defined(_KERNEL)
#if (SOLARIS || defined(__sgi)) && defined(_KERNEL)
extern kmutex_t ipf_frag;
extern kmutex_t ipf_natfrag;
extern kmutex_t ipf_nat;
@ -120,7 +127,6 @@ ipfr_t *table[];
if (!bcmp((char *)&frag.ipfr_src, (char *)&fr->ipfr_src,
IPFR_CMPSZ)) {
ipfr_stats.ifs_exists++;
MUTEX_EXIT(&ipf_frag);
return NULL;
}
@ -131,7 +137,6 @@ ipfr_t *table[];
KMALLOC(fr, ipfr_t *, sizeof(*fr));
if (fr == NULL) {
ipfr_stats.ifs_nomem++;
MUTEX_EXIT(&ipf_frag);
return NULL;
}
@ -183,7 +188,7 @@ nat_t *nat;
MUTEX_ENTER(&ipf_natfrag);
if ((ipf = ipfr_new(ip, fin, pass, ipfr_nattab))) {
ipf->ipfr_data = nat;
nat->nat_frag = ipf;
nat->nat_data = ipf;
}
MUTEX_EXIT(&ipf_natfrag);
return ipf ? 0 : -1;
@ -201,7 +206,6 @@ ipfr_t *table[];
{
ipfr_t *f, frag;
u_int idx;
int ret;
/*
* For fragments, we record protocol, packet id, TOS and both IP#'s
@ -242,16 +246,16 @@ ipfr_t *table[];
table[idx] = f;
}
off = ip->ip_off;
atoff = (off & 0x1fff) - (fin->fin_dlen >> 3);
atoff = off + (fin->fin_dlen >> 3);
/*
* If we've follwed the fragments, and this is the
* last (in order), shrink expiration time.
*/
if (atoff == f->ipfr_off) {
if ((off & 0x1fff) == f->ipfr_off) {
if (!(off & IP_MF))
f->ipfr_ttl = 1;
else
f->ipfr_off = off;
f->ipfr_off = atoff;
}
ipfr_stats.ifs_hits++;
return f;
@ -261,7 +265,7 @@ ipfr_t *table[];
/*
* functional interface for normal lookups of the fragment cache
* functional interface for NAT lookups of the NAT fragment cache
*/
nat_t *ipfr_nat_knownfrag(ip, fin)
ip_t *ip;
@ -271,15 +275,25 @@ fr_info_t *fin;
ipfr_t *ipf;
MUTEX_ENTER(&ipf_natfrag);
ipf = ipfr_lookup(ip, fin, ipfr_heads);
nat = ipf ? ipf->ipfr_data : NULL;
ipf = ipfr_lookup(ip, fin, ipfr_nattab);
if (ipf) {
nat = ipf->ipfr_data;
/*
* This is the last fragment for this packet.
*/
if (ipf->ipfr_ttl == 1) {
nat->nat_data = NULL;
ipf->ipfr_data = NULL;
}
} else
nat = NULL;
MUTEX_EXIT(&ipf_natfrag);
return nat;
}
/*
* functional interface for NAT lookups of the NAT fragment cache
* functional interface for normal lookups of the fragment cache
*/
int ipfr_knownfrag(ip, fin)
ip_t *ip;
@ -296,6 +310,25 @@ fr_info_t *fin;
}
/*
* forget any references to this external object.
*/
void ipfr_forget(nat)
void *nat;
{
ipfr_t *fr;
int idx;
MUTEX_ENTER(&ipf_natfrag);
for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
for (fr = ipfr_heads[idx]; fr; fr = fr->ipfr_next)
if (fr->ipfr_data == nat)
fr->ipfr_data = NULL;
MUTEX_EXIT(&ipf_natfrag);
}
/*
* Free memory in use by fragment state info. kept.
*/
@ -304,11 +337,7 @@ void ipfr_unload()
ipfr_t **fp, *fr;
nat_t *nat;
int idx;
#if !SOLARIS && defined(_KERNEL)
int s;
#endif
SPLNET(s);
MUTEX_ENTER(&ipf_frag);
for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
for (fp = &ipfr_heads[idx]; (fr = *fp); ) {
@ -323,14 +352,13 @@ void ipfr_unload()
for (fp = &ipfr_nattab[idx]; (fr = *fp); ) {
*fp = fr->ipfr_next;
if ((nat = (nat_t *)fr->ipfr_data)) {
if (nat->nat_frag == fr)
nat->nat_frag = NULL;
if (nat->nat_data == fr)
nat->nat_data = NULL;
}
KFREE(fr);
}
MUTEX_EXIT(&ipf_natfrag);
MUTEX_EXIT(&ipf_nat);
SPLX(s);
}
@ -339,7 +367,7 @@ void ipfr_unload()
* Slowly expire held state for fragments. Timeouts are set * in expectation
* of this being called twice per second.
*/
# if (BSD >= 199306) || SOLARIS
# if (BSD >= 199306) || SOLARIS || defined(__sgi)
void ipfr_slowtimer()
# else
int ipfr_slowtimer()
@ -349,8 +377,12 @@ int ipfr_slowtimer()
nat_t *nat;
int s, idx;
#ifdef __sgi
ipfilter_sgi_intfsync();
#endif
SPL_NET(s);
MUTEX_ENTER(&ipf_frag);
SPLNET(s);
/*
* Go through the entire table, looking for entries to expire,
@ -399,8 +431,8 @@ int ipfr_slowtimer()
ipfr_stats.ifs_expire++;
ipfr_inuse--;
if ((nat = (nat_t *)fr->ipfr_data)) {
if (nat->nat_frag == fr)
nat->nat_frag = NULL;
if (nat->nat_data == fr)
nat->nat_data = NULL;
}
KFREE(fr);
} else
@ -408,16 +440,17 @@ int ipfr_slowtimer()
}
MUTEX_EXIT(&ipf_natfrag);
MUTEX_EXIT(&ipf_nat);
SPLX(s);
# if SOLARIS
SPL_X(s);
fr_timeoutstate();
ip_natexpire();
fr_authexpire();
# if SOLARIS
ipfr_timer_id = timeout(ipfr_slowtimer, NULL, drv_usectohz(500000));
# else
fr_timeoutstate();
ip_natexpire();
# ifndef linux
ip_slowtimo();
# if BSD < 199306
# endif
# if (BSD < 199306) && !defined(__sgi)
return 0;
# endif
# endif

20
sys/netinet/ip_frag.h
View File

@ -1,12 +1,12 @@
/*
* (C)opyright 1993-1997 by Darren Reed.
* Copyright (C) 1993-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* @(#)ip_frag.h 1.5 3/24/96
* $Id: ip_frag.h,v 2.0.2.7 1997/05/08 10:10:18 darrenr Exp $
* $Id: ip_frag.h,v 2.0.2.12 1997/10/23 14:56:01 darrenr Exp $
*/
#ifndef __IP_FRAG_H__
@ -41,14 +41,16 @@ typedef struct ipfrstat {
#define IPFR_CMPSZ (4 + 4 + 2 + 1 + 1)
extern ipfrstat_t *ipfr_fragstats __P((void));
extern int ipfr_newfrag __P((ip_t *, fr_info_t *, int));
extern int ipfr_nat_newfrag __P((ip_t *, fr_info_t *, int, struct nat *));
extern nat_t *ipfr_nat_knownfrag __P((ip_t *, fr_info_t *));
extern int ipfr_knownfrag __P((ip_t *, fr_info_t *));
extern void ipfr_unload __P((void));
extern int fr_ipfrttl;
extern ipfrstat_t *ipfr_fragstats __P((void));
extern int ipfr_newfrag __P((ip_t *, fr_info_t *, int));
extern int ipfr_nat_newfrag __P((ip_t *, fr_info_t *, int, struct nat *));
extern nat_t *ipfr_nat_knownfrag __P((ip_t *, fr_info_t *));
extern int ipfr_knownfrag __P((ip_t *, fr_info_t *));
extern void ipfr_forget __P((void *));
extern void ipfr_unload __P((void));
#if (BSD >= 199306) || SOLARIS
#if (BSD >= 199306) || SOLARIS || defined(__sgi)
extern void ipfr_slowtimer __P((void));
#else
extern int ipfr_slowtimer __P((void));

473
sys/netinet/ip_log.c Normal file
View File

@ -0,0 +1,473 @@
/*
* Copyright (C) 1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* $Id: ip_log.c,v 2.0.2.13.2.2 1997/11/12 10:52:21 darrenr Exp $
*/
#ifdef IPFILTER_LOG
# ifndef SOLARIS
# define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
# endif
# ifdef __FreeBSD__
# if defined(KERNEL) && !defined(_KERNEL)
# define _KERNEL
# endif
# if defined(_KERNEL) && !defined(IPFILTER_LKM)
# include <sys/osreldate.h>
# else
# include <osreldate.h>
# endif
# endif
# ifndef _KERNEL
# include <stdio.h>
# include <string.h>
# include <stdlib.h>
# include <ctype.h>
# endif
# include <sys/errno.h>
# include <sys/types.h>
# include <sys/param.h>
# include <sys/file.h>
# if __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) && !defined(linux)
# include <sys/systm.h>
# endif
# include <sys/uio.h>
# if !SOLARIS
# if (NetBSD > 199609) || (OpenBSD > 199603)
# include <sys/dirent.h>
# else
# include <sys/dir.h>
# endif
# ifndef linux
# include <sys/mbuf.h>
# endif
# else
# 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
# ifndef 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 <net/route.h>
# include <netinet/in.h>
# ifdef __sgi
# include <sys/ddi.h>
# ifdef IFF_DRVRLOCK /* IRIX6 */
# include <sys/hashing.h>
# endif
# endif
# if !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>
# ifndef 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_proxy.h"
# include "netinet/ip_nat.h"
# include "netinet/ip_frag.h"
# include "netinet/ip_state.h"
# include "netinet/ip_auth.h"
# ifndef MIN
# define MIN(a,b) (((a)<(b))?(a):(b))
# endif
# if SOLARIS || defined(__sgi)
extern kmutex_t ipl_mutex;
# if SOLARIS
extern kcondvar_t iplwait;
# endif
# endif
iplog_t **iplh[IPL_LOGMAX+1], *iplt[IPL_LOGMAX+1];
int iplused[IPL_LOGMAX+1];
u_long iplcrc[IPL_LOGMAX+1];
u_long iplcrcinit;
#ifdef linux
static struct wait_queue *iplwait[IPL_LOGMAX+1];
#endif
/*
* Initialise log buffers & pointers. Also iniialised the CRC to a local
* secret for use in calculating the "last log checksum".
*/
void ipflog_init()
{
struct timeval tv;
int i;
for (i = IPL_LOGMAX; i >= 0; i--) {
iplt[i] = NULL;
iplh[i] = &iplt[i];
iplused[i] = 0;
}
# if BSD >= 199306 || defined(__FreeBSD__) || defined(__sgi)
microtime(&tv);
# else
uniqtime(&tv);
# endif
iplcrcinit = tv.tv_sec ^ (tv.tv_usec << 8) ^ tv.tv_usec;
}
/*
* ipflog
* 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 ipflog(flags, ip, fin, m)
u_int flags;
ip_t *ip;
fr_info_t *fin;
mb_t *m;
{
ipflog_t ipfl;
register int mlen, hlen;
u_long crc;
size_t sizes[2];
void *ptrs[2];
int types[2];
# if SOLARIS
ill_t *ifp = fin->fin_ifp;
# else
struct ifnet *ifp = fin->fin_ifp;
# endif
/*
* calculate header size.
*/
hlen = fin->fin_hlen;
if (ip->ip_p == IPPROTO_TCP)
hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
else if (ip->ip_p == IPPROTO_UDP)
hlen += MIN(sizeof(udphdr_t), fin->fin_dlen);
else if (ip->ip_p == IPPROTO_ICMP) {
struct icmp *icmp = (struct icmp *)((char *)ip + hlen);
/*
* 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;
}
}
/*
* Get the interface number and name to which this packet is
* currently associated.
*/
# if SOLARIS
ipfl.fl_unit = (u_char)ifp->ill_ppa;
bcopy(ifp->ill_name, ipfl.fl_ifname, MIN(ifp->ill_name_length, 4));
mlen = (flags & FR_LOGBODY) ? MIN(msgdsize(m) - hlen, 128) : 0;
# else
# if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
(defined(OpenBSD) && (OpenBSD >= 199603))
strncpy(ipfl.fl_ifname, ifp->if_xname, IFNAMSIZ);
# else
# ifndef linux
ipfl.fl_unit = (u_char)ifp->if_unit;
# endif
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];
# endif
mlen = (flags & FR_LOGBODY) ? MIN(ip->ip_len - hlen, 128) : 0;
# endif
ipfl.fl_plen = (u_char)mlen;
ipfl.fl_hlen = (u_char)hlen;
ipfl.fl_rule = fin->fin_rule;
ipfl.fl_group = fin->fin_group;
ipfl.fl_flags = flags;
ptrs[0] = (void *)&ipfl;
sizes[0] = sizeof(ipfl);
types[0] = 0;
#if SOLARIS
/*
* Are we copied from the mblk or an aligned array ?
*/
if (ip == (ip_t *)m->b_rptr) {
ptrs[1] = m;
sizes[1] = hlen + mlen;
types[1] = 1;
} else {
ptrs[1] = ip;
sizes[1] = hlen + mlen;
types[1] = 0;
}
#else
ptrs[1] = m;
sizes[1] = hlen + mlen;
types[1] = 1;
#endif
crc = (ipf_cksum((u_short *)fin, FI_CSIZE) << 8) + iplcrcinit;
return ipllog(IPL_LOGIPF, crc, ptrs, sizes, types, 2);
}
/*
* ipllog
*/
int ipllog(dev, crc, items, itemsz, types, cnt)
int dev;
u_long crc;
void **items;
size_t *itemsz;
int *types, cnt;
{
iplog_t *ipl;
caddr_t buf, s;
int len, 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 (crc) {
MUTEX_ENTER(&ipl_mutex);
if ((iplcrc[dev] == crc) && *iplh[dev]) {
(*iplh[dev])->ipl_count++;
MUTEX_EXIT(&ipl_mutex);
return 1;
}
iplcrc[dev] = crc;
MUTEX_EXIT(&ipl_mutex);
}
/*
* Get the total amount of data to be logged.
*/
for (i = 0, len = sizeof(iplog_t); i < cnt; i++)
len += itemsz[i];
/*
* check that we have space to record this information and can
* allocate that much.
*/
KMALLOC(buf, caddr_t, len);
if (!buf)
return 0;
MUTEX_ENTER(&ipl_mutex);
if ((iplused[dev] + len) > IPLLOGSIZE) {
MUTEX_EXIT(&ipl_mutex);
KFREES(buf, len);
return 0;
}
iplused[dev] += len;
MUTEX_EXIT(&ipl_mutex);
/*
* advance the log pointer to the next empty record and deduct the
* amount of space we're going to use.
*/
ipl = (iplog_t *)buf;
ipl->ipl_magic = IPL_MAGIC;
ipl->ipl_count = 1;
ipl->ipl_next = NULL;
ipl->ipl_dsize = len;
# if SOLARIS || defined(sun) || defined(linux)
uniqtime((struct timeval *)&ipl->ipl_sec);
# else
# if BSD >= 199306 || defined(__FreeBSD__) || defined(__sgi)
microtime((struct timeval *)&ipl->ipl_sec);
# endif
# 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, s = buf + sizeof(*ipl); i < cnt; i++) {
if (types[i] == 0)
bcopy(items[i], s, itemsz[i]);
else if (types[i] == 1) {
# if SOLARIS
copyout_mblk(items[i], 0, itemsz[i], s);
# else
m_copydata(items[i], 0, itemsz[i], s);
# endif
}
s += itemsz[i];
}
MUTEX_ENTER(&ipl_mutex);
*iplh[dev] = ipl;
iplh[dev] = &ipl->ipl_next;
# if SOLARIS
cv_signal(&iplwait);
mutex_exit(&ipl_mutex);
# else
MUTEX_EXIT(&ipl_mutex);
# ifdef linux
wake_up_interruptible(&iplwait[dev]);
# else
wakeup(&iplh[dev]);
# endif
# endif
return 1;
}
int ipflog_read(unit, uio)
int unit;
struct uio *uio;
{
iplog_t *ipl;
int error = 0, dlen, copied;
# if defined(_KERNEL) && !SOLARIS
int s;
# endif
/*
* Sanity checks. Make sure the minor # is valid and we're copying
* a valid chunk of data.
*/
if ((IPL_LOGMAX < unit) || (unit < 0))
return ENXIO;
if (!uio->uio_resid)
return 0;
if ((uio->uio_resid < sizeof(iplog_t)) ||
(uio->uio_resid > IPLLOGSIZE))
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(&ipl_mutex);
while (!iplused[unit] || !iplt[unit]) {
# if SOLARIS && defined(_KERNEL)
if (!cv_wait_sig(&iplwait, &ipl_mutex)) {
MUTEX_EXIT(&ipl_mutex);
return EINTR;
}
# else
# ifdef linux
interruptible_sleep_on(&iplwait[unit]);
if (current->signal & ~current->blocked)
return -EINTR;
# else
MUTEX_EXIT(&ipl_mutex);
SPL_X(s);
error = SLEEP(&iplh[unit], "ipl sleep");
if (error)
return error;
SPL_NET(s);
MUTEX_ENTER(&ipl_mutex);
# endif /* linux */
# endif /* SOLARIS */
}
# if BSD >= 199306 || defined(__FreeBSD__)
uio->uio_rw = UIO_READ;
# endif
for (copied = 0; (ipl = iplt[unit]); copied += dlen) {
dlen = ipl->ipl_dsize;
if (dlen + sizeof(iplog_t) > uio->uio_resid)
break;
/*
* Don't hold the mutex over the uiomove call.
*/
iplt[unit] = ipl->ipl_next;
MUTEX_EXIT(&ipl_mutex);
SPL_X(s);
error = UIOMOVE((caddr_t)ipl, ipl->ipl_dsize, UIO_READ, uio);
KFREES((caddr_t)ipl, ipl->ipl_dsize);
if (error)
break;
SPL_NET(s);
MUTEX_ENTER(&ipl_mutex);
iplused[unit] -= dlen;
}
if (!ipl) {
iplused[unit] = 0;
iplh[unit] = &iplt[unit];
}
if (!error) {
MUTEX_EXIT(&ipl_mutex);
SPL_X(s);
}
#ifdef linux
if (!error)
return copied;
return -error;
#else
return error;
#endif
}
int ipflog_clear(unit)
int unit;
{
iplog_t *ipl;
int used;
while ((ipl = iplt[unit])) {
iplt[unit] = ipl->ipl_next;
KFREES((caddr_t)ipl, ipl->ipl_dsize);
}
iplh[unit] = &iplt[unit];
used = iplused[unit];
iplused[unit] = 0;
iplcrc[unit] = 0;
return used;
}
#endif /* IPFILTER_LOG */

571
sys/netinet/ip_nat.c
View File

@ -1,5 +1,5 @@
/*
* (C)opyright 1995-1996 by Darren Reed.
* Copyright (C) 1995-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
@ -7,9 +7,9 @@
*
* Added redirect stuff and a LOT of bug fixes. (mcn@EnGarde.com)
*/
#if !defined(lint) && defined(LIBC_SCCS)
static char sccsid[] = "@(#)ip_nat.c 1.11 6/5/96 (C) 1995 Darren Reed";
static char rcsid[] = "$Id: ip_nat.c,v 2.0.2.18 1997/05/24 07:34:44 darrenr Exp $";
#if !defined(lint)
static const char sccsid[] = "@(#)ip_nat.c 1.11 6/5/96 (C) 1995 Darren Reed";
static const char rcsid[] = "@(#)$Id: ip_nat.c,v 2.0.2.44.2.3 1997/11/12 10:53:29 darrenr Exp $";
#endif
#if defined(__FreeBSD__) && defined(KERNEL) && !defined(_KERNEL)
@ -28,19 +28,23 @@ static char rcsid[] = "$Id: ip_nat.c,v 2.0.2.18 1997/05/24 07:34:44 darrenr Exp
#include <sys/file.h>
#if defined(KERNEL) && (__FreeBSD_version >= 220000)
# include <sys/filio.h>
# include <sys/fnctl.h>
# include <sys/fcntl.h>
#else
# include <sys/ioctl.h>
#endif
#include <sys/fcntl.h>
#include <sys/uio.h>
#include <sys/protosw.h>
#ifndef linux
# include <sys/protosw.h>
#endif
#include <sys/socket.h>
#ifdef _KERNEL
#if defined(_KERNEL) && !defined(linux)
# include <sys/systm.h>
#endif
#if !defined(__SVR4) && !defined(__svr4__)
# include <sys/mbuf.h>
# ifndef linux
# include <sys/mbuf.h>
# endif
#else
# include <sys/filio.h>
# include <sys/byteorder.h>
@ -63,18 +67,27 @@ static char rcsid[] = "$Id: ip_nat.c,v 2.0.2.18 1997/05/24 07:34:44 darrenr Exp
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#ifdef __sgi
# ifdef IFF_DRVRLOCK /* IRIX6 */
#include <sys/hashing.h>
#include <netinet/in_var.h>
# endif
#endif
#ifdef RFC1825
#include <vpn/md5.h>
#include <vpn/ipsec.h>
extern struct ifnet vpnif;
#endif
#include <netinet/ip_var.h>
#ifndef linux
# include <netinet/ip_var.h>
#endif
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/tcpip.h>
#include <netinet/ip_icmp.h>
#include "netinet/ip_compat.h"
#include <netinet/tcpip.h>
#include "netinet/ip_fil.h"
#include "netinet/ip_proxy.h"
#include "netinet/ip_nat.h"
@ -88,14 +101,32 @@ extern struct ifnet vpnif;
nat_t *nat_table[2][NAT_SIZE], *nat_instances = NULL;
ipnat_t *nat_list = NULL;
u_long fr_defnatage = 1200;
u_long fr_defnatage = 1200, /* 10 minutes (600 seconds) */
fr_defnaticmpage = 6; /* 3 seconds */
natstat_t nat_stats;
#if SOLARIS && defined(_KERNEL)
#if (SOLARIS || defined(__sgi)) && defined(_KERNEL)
extern kmutex_t ipf_nat;
extern kmutex_t ipf_natfrag;
#endif
static int flush_nattable __P((void)), clear_natlist __P((void));
static int nat_flushtable __P((void));
static int nat_clearlist __P((void));
static void nat_delete __P((struct nat *));
static int nat_ifpaddr __P((nat_t *, void *, struct in_addr *));
#define LONG_SUM(in) (((in) & 0xffff) + ((in) >> 16))
#define CALC_SUMD(s1, s2, sd) { \
/* Do it twice */ \
(s1) = ((s1) & 0xffff) + ((s1) >> 16); \
(s1) = ((s1) & 0xffff) + ((s1) >> 16); \
/* Do it twice */ \
(s2) = ((s2) & 0xffff) + ((s2) >> 16); \
(s2) = ((s2) & 0xffff) + ((s2) >> 16); \
/* Because ~1 == -2, We really need ~1 == -1 */ \
if ((s1) > (s2)) (s2)--; \
(sd) = (s2) - (s1); \
(sd) = ((sd) & 0xffff) + ((sd) >> 16); }
void fix_outcksum(sp, n)
u_short *sp;
@ -104,11 +135,9 @@ u_long n;
register u_short sumshort;
register u_long sum1;
#ifdef sparc
sum1 = (~(*sp)) & 0xffff;
#else
if (!n)
return;
sum1 = (~ntohs(*sp)) & 0xffff;
#endif
sum1 += (n);
sum1 = (sum1 >> 16) + (sum1 & 0xffff);
/* Again */
@ -125,6 +154,8 @@ u_long n;
register u_short sumshort;
register u_long sum1;
if (!n)
return;
#ifdef sparc
sum1 = (~(*sp)) & 0xffff;
#else
@ -164,21 +195,33 @@ u_long n;
* Handle ioctls which manipulate the NAT.
*/
int nat_ioctl(data, cmd, mode)
#if defined(__NetBSD__) || defined(__OpenBSD__)
u_long cmd;
#else
int cmd;
#endif
caddr_t data;
int cmd, mode;
int mode;
{
register ipnat_t *nat, *n = NULL, **np = NULL;
ipnat_t natd;
int error = 0, ret, s;
int error = 0, ret;
#if defined(_KERNEL) && !SOLARIS
int s;
#endif
nat = NULL; /* XXX gcc -Wuninitialized */
/*
* For add/delete, look to see if the NAT entry is already present
*/
SPL_NET(s);
MUTEX_ENTER(&ipf_nat);
SPLNET(s);
if ((cmd == SIOCADNAT) || (cmd == SIOCRMNAT)) {
IRCOPY(data, (char *)&natd, sizeof(natd));
nat = &natd;
nat->in_inip &= nat->in_inmsk;
nat->in_outip &= nat->in_outmsk;
for (np = &nat_list; (n = *np); np = &n->in_next)
if (!bcmp((char *)&nat->in_flags, (char *)&n->in_flags,
IPN_CMPSIZ))
@ -201,8 +244,10 @@ int cmd, mode;
error = ENOMEM;
break;
}
IRCOPY((char *)data, (char *)n, sizeof(*n));
bcopy((char *)nat, (char *)n, sizeof(*n));
n->in_ifp = (void *)GETUNIT(n->in_ifname);
if (!n->in_ifp)
n->in_ifp = (void *)-1;
n->in_apr = ap_match(n->in_p, n->in_plabel);
n->in_next = *np;
n->in_use = 0;
@ -211,7 +256,7 @@ int cmd, mode;
n->in_space -= 2;
else
n->in_space = 1; /* single IP# mapping */
if (n->in_outmsk != 0xffffffff)
if ((n->in_outmsk != 0xffffffff) && n->in_outmsk)
n->in_nip = ntohl(n->in_outip) + 1;
else
n->in_nip = ntohl(n->in_outip);
@ -260,9 +305,9 @@ int cmd, mode;
IRCOPY((char *)data, (char *)&nl, sizeof(nl));
if (nat_lookupredir(&nl))
if (nat_lookupredir(&nl)) {
IWCOPY((char *)&nl, (char *)data, sizeof(nl));
else
} else
error = ESRCH;
break;
}
@ -271,7 +316,7 @@ int cmd, mode;
error = EPERM;
break;
}
ret = flush_nattable();
ret = nat_flushtable();
IWCOPY((caddr_t)&ret, data, sizeof(ret));
break;
case SIOCCNATL :
@ -279,21 +324,25 @@ int cmd, mode;
error = EPERM;
break;
}
ret = clear_natlist();
ret = nat_clearlist();
IWCOPY((caddr_t)&ret, data, sizeof(ret));
break;
case FIONREAD :
#ifdef IPFILTER_LOG
*(int *)data = iplused[IPL_LOGNAT];
IWCOPY((caddr_t)&iplused[IPL_LOGNAT], (caddr_t)data,
sizeof(iplused[IPL_LOGNAT]));
#endif
break;
}
SPLX(s);
MUTEX_EXIT(&ipf_nat);
SPL_X(s);
return error;
}
/*
* Delete a nat entry from the various lists and table.
*/
static void nat_delete(natd)
struct nat *natd;
{
@ -314,6 +363,11 @@ struct nat *natd;
break;
}
/*
* If there is an active reference from the nat entry to its parent
* rule, decrement the rule's reference count and free it too if no
* longer being used.
*/
if ((ipn = natd->nat_ptr)) {
ipn->in_space++;
ipn->in_use--;
@ -324,18 +378,20 @@ struct nat *natd;
nat_stats.ns_rules--;
}
}
MUTEX_ENTER(&ipf_natfrag);
if (nat->nat_frag && nat->nat_frag->ipfr_data == nat)
nat->nat_frag->ipfr_data = NULL;
MUTEX_EXIT(&ipf_natfrag);
/*
* If there's a fragment table entry too for this nat entry, then
* dereference that as well.
*/
ipfr_forget((void *)natd);
KFREE(natd);
}
/*
* flush_nattable - clear the NAT table of all mapping entries.
* nat_flushtable - clear the NAT table of all mapping entries.
*/
static int flush_nattable()
static int nat_flushtable()
{
register nat_t *nat, **natp;
register int j = 0;
@ -358,9 +414,9 @@ static int flush_nattable()
/*
* clear_natlist - delete all entries in the active NAT mapping list.
* nat_clearlist - delete all entries in the active NAT mapping list.
*/
static int clear_natlist()
static int nat_clearlist()
{
register ipnat_t *n, **np = &nat_list;
int i = 0;
@ -383,15 +439,90 @@ static int clear_natlist()
}
/*
* return the first IP Address associated with an interface
*/
static int nat_ifpaddr(nat, ifptr, inp)
nat_t *nat;
void *ifptr;
struct in_addr *inp;
{
#if SOLARIS
ill_t *ill = ifptr;
#else
struct ifnet *ifp = ifptr;
#endif
struct in_addr in;
#if SOLARIS
in.s_addr = ill->ill_ipif->ipif_local_addr;
#else /* SOLARIS */
# if linux
;
# else /* linux */
struct ifaddr *ifa;
struct sockaddr_in *sin;
# if (__FreeBSD_version >= 300000)
ifa = TAILQ_FIRST(&ifp->if_addrhead);
# else
# if defined(__NetBSD__) || defined(__OpenBSD__)
ifa = ifp->if_addrlist.tqh_first;
# else
# if defined(__sgi) && defined(IFF_DRVRLOCK) /* IRIX 6 */
ifa = &((struct in_ifaddr *)ifp->in_ifaddr)->ia_ifa;
# else
ifa = ifp->if_addrlist;
# endif
# endif /* __NetBSD__ || __OpenBSD__ */
# endif /* __FreeBSD_version >= 300000 */
# if (BSD < 199306) && !(/*IRIX6*/defined(__sgi) && defined(IFF_DRVRLOCK))
sin = (SOCKADDR_IN *)&ifa->ifa_addr;
# else
sin = (SOCKADDR_IN *)ifa->ifa_addr;
while (sin && ifa &&
sin->sin_family != AF_INET) {
# if (__FreeBSD_version >= 300000)
ifa = TAILQ_NEXT(ifa, ifa_link);
# else
# if defined(__NetBSD__) || defined(__OpenBSD__)
ifa = ifa->ifa_list.tqe_next;
# else
ifa = ifa->ifa_next;
# endif
# endif /* __FreeBSD_version >= 300000 */
if (ifa)
sin = (SOCKADDR_IN *)ifa->ifa_addr;
}
if (!ifa)
sin = NULL;
if (!sin) {
KFREE(nat);
return -1;
}
# endif /* (BSD < 199306) && (!__sgi && IFF_DRVLOCK) */
in = sin->sin_addr;
in.s_addr = ntohl(in.s_addr);
# endif /* linux */
#endif /* SOLARIS */
*inp = in;
return 0;
}
/*
* Create a new NAT table entry.
*/
#ifdef __STDC__
nat_t *nat_new(ipnat_t *np, ip_t *ip, fr_info_t *fin, u_short flags, int direction)
#else
nat_t *nat_new(np, ip, fin, flags, direction)
ipnat_t *np;
ip_t *ip;
fr_info_t *fin;
u_short flags;
int direction;
#endif
{
register u_long sum1, sum2, sumd;
u_short port = 0, sport = 0, dport = 0, nport = 0;
@ -419,11 +550,6 @@ int direction;
* Search the current table for a match.
*/
if (direction == NAT_OUTBOUND) {
#if SOLARIS
ill_t *ill = fin->fin_ifp;
#else
struct ifnet *ifp = fin->fin_ifp;
#endif
/*
* If it's an outbound packet which doesn't match any existing
* record, then create a new port
@ -432,50 +558,13 @@ int direction;
port = 0;
in.s_addr = np->in_nip;
if (!in.s_addr && (np->in_outmsk == 0xffffffff)) {
#if SOLARIS
in.s_addr = ill->ill_ipif->ipif_local_addr;
#else
struct ifaddr *ifa;
struct sockaddr_in *sin;
# if (__FreeBSD_version >= 300000)
ifa = TAILQ_FIRST(&ifp->if_addrhead);
# else
# ifdef __NetBSD__
ifa = ifp->if_addrlist.tqh_first;
# else
ifa = ifp->if_addrlist;
# endif
# endif
# if BSD < 199306
sin = (SOCKADDR_IN *)&ifa->ifa_addr;
# else
sin = (SOCKADDR_IN *)ifa->ifa_addr;
while (sin && ifa &&
sin->sin_family != AF_INET) {
# if (__FreeBSD_version >= 300000)
ifa = TAILQ_NEXT(ifa, ifa_link);
# else
# ifdef __NetBSD__
ifa = ifa->ifa_list.tqe_next;
# else
ifa = ifa->ifa_next;
# endif
# endif
sin = (SOCKADDR_IN *)ifa->ifa_addr;
}
if (!ifa)
sin = NULL;
if (!sin) {
KFREE(nat);
if (nat_ifpaddr(nat, fin->fin_ifp, &in) == -1)
return NULL;
}
# endif
in = sin->sin_addr;
in.s_addr = ntohl(in.s_addr);
#endif
}
if (nflags & IPN_TCPUDP) {
} else if (!in.s_addr && !np->in_outmsk) {
in.s_addr = ntohl(ip->ip_src.s_addr);
if (nflags & IPN_TCPUDP)
port = sport;
} else if (nflags & IPN_TCPUDP) {
port = htons(np->in_pnext++);
if (np->in_pnext >= ntohs(np->in_pmax)) {
np->in_pnext = ntohs(np->in_pmin);
@ -520,7 +609,7 @@ int direction;
* internal port.
*/
in.s_addr = ntohl(np->in_inip);
if (!(nport = np->in_pnext))
if (!(nport = htons(np->in_pnext)))
nport = dport;
nat->nat_inip.s_addr = htonl(in.s_addr);
@ -597,10 +686,10 @@ int direction;
nat->nat_dir = direction;
if (direction == NAT_OUTBOUND) {
if (flags & IPN_TCPUDP)
tcp->th_sport = htons(port);
tcp->th_sport = port;
} else {
if (flags & IPN_TCPUDP)
tcp->th_dport = htons(nport);
tcp->th_dport = nport;
}
nat_stats.ns_added++;
nat_stats.ns_inuse++;
@ -609,6 +698,132 @@ int direction;
}
nat_t *nat_icmpinlookup(ip, fin)
ip_t *ip;
fr_info_t *fin;
{
icmphdr_t *icmp;
tcphdr_t *tcp = NULL;
ip_t *oip;
int flags = 0, type;
icmp = (icmphdr_t *)fin->fin_dp;
/*
* Does it at least have the return (basic) IP header ?
* Only a basic IP header (no options) should be with an ICMP error
* header.
*/
if ((ip->ip_hl != 5) || (ip->ip_len < sizeof(*icmp) + sizeof(ip_t)))
return NULL;
type = icmp->icmp_type;
/*
* If it's not an error type, then return.
*/
if ((type != ICMP_UNREACH) && (type != ICMP_SOURCEQUENCH) &&
(type != ICMP_REDIRECT) && (type != ICMP_TIMXCEED) &&
(type != ICMP_PARAMPROB))
return NULL;
oip = (ip_t *)((char *)fin->fin_dp + 8);
if (oip->ip_p == IPPROTO_TCP)
flags = IPN_TCP;
else if (oip->ip_p == IPPROTO_UDP)
flags = IPN_UDP;
if (flags & IPN_TCPUDP) {
tcp = (tcphdr_t *)((char *)oip + (oip->ip_hl << 2));
return nat_inlookup(fin->fin_ifp, flags, oip->ip_dst,
tcp->th_dport, oip->ip_src, tcp->th_sport);
}
return nat_inlookup(fin->fin_ifp, 0, oip->ip_src, 0, oip->ip_dst, 0);
}
/*
* This should *ONLY* be used for incoming packets to make sure a NAT'd ICMP
* packet gets correctly recognised.
*/
nat_t *nat_icmpin(ip, fin, nflags)
ip_t *ip;
fr_info_t *fin;
int *nflags;
{
icmphdr_t *icmp;
nat_t *nat;
ip_t *oip;
int flags = 0;
if (!(nat = nat_icmpinlookup(ip, fin)))
return NULL;
*nflags = IPN_ICMPERR;
icmp = (icmphdr_t *)fin->fin_dp;
oip = (ip_t *)((char *)icmp + 8);
if (oip->ip_p == IPPROTO_TCP)
flags = IPN_TCP;
else if (oip->ip_p == IPPROTO_UDP)
flags = IPN_UDP;
/*
* Need to adjust ICMP header to include the real IP#'s and
* port #'s. Only apply a checksum change relative to the
* IP address change is it will be modified again in ip_natout
* for both address and port. Two checksum changes are
* necessary for the two header address changes. Be careful
* to only modify the checksum once for the port # and twice
* for the IP#.
*/
if (flags & IPN_TCPUDP) {
tcphdr_t *tcp = (tcphdr_t *)(oip + 1);
u_long sum1, sum2, sumd;
struct in_addr in;
if (nat->nat_dir == NAT_OUTBOUND) {
sum1 = LONG_SUM(ntohl(oip->ip_src.s_addr));
in = nat->nat_outip;
oip->ip_src = in;
tcp->th_sport = nat->nat_outport;
} else {
sum1 = LONG_SUM(ntohl(oip->ip_dst.s_addr));
in = nat->nat_inip;
oip->ip_dst = in;
tcp->th_dport = nat->nat_inport;
}
sum2 = LONG_SUM(in.s_addr);
CALC_SUMD(sum1, sum2, sumd);
sumd = (sumd & 0xffff) + (sumd >> 16);
if (nat->nat_dir == NAT_OUTBOUND) {
fix_incksum(&oip->ip_sum, sumd);
fix_incksum(&icmp->icmp_cksum, sumd);
} else {
fix_outcksum(&oip->ip_sum, sumd);
fix_outcksum(&icmp->icmp_cksum, sumd);
}
/*
* TCP checksum doesn't make it into the 1st eight
* bytes but UDP does.
*/
if (ip->ip_p == IPPROTO_UDP) {
udphdr_t *udp = (udphdr_t *)tcp;
if (udp->uh_sum) {
if (nat->nat_dir == NAT_OUTBOUND)
fix_incksum(&udp->uh_sum,
nat->nat_sumd);
else
fix_outcksum(&udp->uh_sum,
nat->nat_sumd);
}
}
} else
ip->ip_dst = nat->nat_outip;
nat->nat_age = fr_defnaticmpage;
return nat;
}
/*
* NB: these lookups don't lock access to the list, it assume it has already
* been done!
@ -619,11 +834,15 @@ int direction;
* we're looking for a table entry, based on the destination address.
* NOTE: THE PACKET BEING CHECKED (IF FOUND) HAS A MAPPING ALREADY.
*/
#ifdef __STDC__
nat_t *nat_inlookup(void *ifp, int flags, struct in_addr src, u_short sport, struct in_addr mapdst, u_short mapdport)
#else
nat_t *nat_inlookup(ifp, flags, src, sport, mapdst, mapdport)
void *ifp;
register int flags;
struct in_addr src , mapdst;
u_short sport, mapdport;
#endif
{
register nat_t *nat;
@ -648,24 +867,29 @@ u_short sport, mapdport;
* we're looking for a table entry, based on the source address.
* NOTE: THE PACKET BEING CHECKED (IF FOUND) HAS A MAPPING ALREADY.
*/
#ifdef __STDC__
nat_t *nat_outlookup(void *ifp, int flags, struct in_addr src, u_short sport, struct in_addr dst, u_short dport)
#else
nat_t *nat_outlookup(ifp, flags, src, sport, dst, dport)
void *ifp;
register int flags;
struct in_addr src , dst;
u_short sport, dport;
#endif
{
register nat_t *nat;
flags &= IPN_TCPUDP;
nat = nat_table[0][src.s_addr % NAT_SIZE];
for (; nat; nat = nat->nat_hnext[0])
for (; nat; nat = nat->nat_hnext[0]) {
if ((!ifp || ifp == nat->nat_ifp) &&
nat->nat_inip.s_addr == src.s_addr &&
nat->nat_oip.s_addr == dst.s_addr &&
flags == nat->nat_flags && (!flags ||
(nat->nat_inport == sport && nat->nat_oport == dport)))
return nat;
}
return NULL;
}
@ -675,11 +899,15 @@ u_short sport, dport;
* real destination address/port. We use this lookup when sending a packet
* out, we're looking for a table entry, based on the source address.
*/
#ifdef __STDC__
nat_t *nat_lookupmapip(void *ifp, int flags, struct in_addr mapsrc, u_short mapsport, struct in_addr dst, u_short dport)
#else
nat_t *nat_lookupmapip(ifp, flags, mapsrc, mapsport, dst, dport)
void *ifp;
register int flags;
struct in_addr mapsrc , dst;
u_short mapsport, dport;
#endif
{
register nat_t *nat;
@ -710,10 +938,11 @@ register natlookup_t *np;
* If nl_inip is non null, this is a lookup based on the real
* ip address. Else, we use the fake.
*/
if ((nat = nat_outlookup(NULL, IPN_TCPUDP, np->nl_inip, np->nl_inport,
np->nl_outip, np->nl_outport))) {
np->nl_inip = nat->nat_outip;
np->nl_inport = nat->nat_outport;
if ((nat = nat_outlookup(NULL, np->nl_flags, np->nl_inip,
np->nl_inport, np->nl_outip,
np->nl_outport))) {
np->nl_realip = nat->nat_outip;
np->nl_realport = nat->nat_outport;
}
return nat;
}
@ -731,10 +960,11 @@ fr_info_t *fin;
register ipnat_t *np;
register u_long ipa;
tcphdr_t *tcp = NULL;
nat_t *nat;
u_short nflags = 0, sport = 0, dport = 0, *csump = NULL;
struct ifnet *ifp;
frentry_t *fr;
nat_t *nat;
int natadd = 1;
if ((fr = fin->fin_fr) && !(fr->fr_flags & FR_DUP) &&
fr->fr_tif.fd_ifp && fr->fr_tif.fd_ifp != (void *)-1)
@ -757,11 +987,12 @@ fr_info_t *fin;
ipa = ip->ip_src.s_addr;
MUTEX_ENTER(&ipf_nat);
if ((nat = ipfr_nat_knownfrag(ip, fin)))
;
else if ((nat = nat_outlookup(fin->fin_ifp, nflags, ip->ip_src, sport,
if ((ip->ip_off & (IP_OFFMASK|IP_MF)) &&
(nat = ipfr_nat_knownfrag(ip, fin)))
natadd = 0;
else if ((nat = nat_outlookup(ifp, nflags, ip->ip_src, sport,
ip->ip_dst, dport)))
np = nat->nat_ptr;
;
else
/*
* If there is no current entry in the nat table for this IP#,
@ -794,7 +1025,7 @@ fr_info_t *fin;
}
if (nat) {
if (!nat->nat_frag && fin->fin_fi.fi_fl & FI_FRAG)
if (natadd && fin->fin_fi.fi_fl & FI_FRAG)
ipfr_nat_newfrag(ip, fin, 0, nat);
nat->nat_age = fr_defnatage;
ip->ip_src = nat->nat_outip;
@ -805,7 +1036,7 @@ fr_info_t *fin;
* Fix up checksums, not by recalculating them, but
* simply computing adjustments.
*/
#if SOLARIS
#if SOLARIS || defined(__sgi)
if (nat->nat_dir == NAT_OUTBOUND)
fix_outcksum(&ip->ip_sum, nat->nat_ipsumd);
else
@ -872,8 +1103,9 @@ fr_info_t *fin;
register struct in_addr in;
struct ifnet *ifp = fin->fin_ifp;
tcphdr_t *tcp = NULL;
u_short sport = 0, dport = 0, nflags = 0, *csump = NULL;
u_short sport = 0, dport = 0, *csump = NULL;
nat_t *nat;
int nflags = 0, natadd = 1;
if (!(ip->ip_off & 0x1fff) && !(fin->fin_fi.fi_fl & FI_SHORT)) {
if (ip->ip_p == IPPROTO_TCP)
@ -891,11 +1123,14 @@ fr_info_t *fin;
MUTEX_ENTER(&ipf_nat);
if ((nat = ipfr_nat_knownfrag(ip, fin)))
if ((ip->ip_p == IPPROTO_ICMP) && (nat = nat_icmpin(ip, fin, &nflags)))
;
else if ((ip->ip_off & IP_OFFMASK) &&
(nat = ipfr_nat_knownfrag(ip, fin)))
natadd = 0;
else if ((nat = nat_inlookup(fin->fin_ifp, nflags, ip->ip_src, sport,
ip->ip_dst, dport)))
np = nat->nat_ptr;
;
else
/*
* If there is no current entry in the nat table for this IP#,
@ -905,16 +1140,8 @@ fr_info_t *fin;
if ((np->in_ifp == ifp) &&
(!np->in_flags || (nflags & np->in_flags)) &&
((in.s_addr & np->in_outmsk) == np->in_outip) &&
(np->in_redir & NAT_REDIRECT ||
np->in_pmin == dport)) {
/*
* If this rule (np) is a redirection, rather
* than a mapping, then do a nat_new.
* Otherwise, if it's just a mapping, do a
* continue;
*/
if (!(np->in_redir & NAT_REDIRECT))
continue;
(np->in_redir & NAT_REDIRECT) &&
(!np->in_pmin || np->in_pmin == dport)) {
if ((nat = nat_new(np, ip, fin, nflags,
NAT_INBOUND)))
#ifdef IPFILTER_LOG
@ -925,10 +1152,13 @@ fr_info_t *fin;
break;
}
if (nat) {
if (!nat->nat_frag && fin->fin_fi.fi_fl & FI_FRAG)
if (natadd && fin->fin_fi.fi_fl & FI_FRAG)
ipfr_nat_newfrag(ip, fin, 0, nat);
(void) ap_check(ip, tcp, fin, nat);
nat->nat_age = fr_defnatage;
if (nflags != IPN_ICMPERR)
nat->nat_age = fr_defnatage;
ip->ip_dst = nat->nat_inip;
nat->nat_bytes += ip->ip_len;
nat->nat_pkts++;
@ -937,13 +1167,13 @@ fr_info_t *fin;
* Fix up checksums, not by recalculating them, but
* simply computing adjustments.
*/
#if SOLARIS
#if SOLARIS || defined(__sgi)
if (nat->nat_dir == NAT_OUTBOUND)
fix_incksum(&ip->ip_sum, nat->nat_ipsumd);
else
fix_outcksum(&ip->ip_sum, nat->nat_ipsumd);
#endif
if (nflags && !(ip->ip_off & 0x1fff) &&
if ((nflags & IPN_TCPUDP) && !(ip->ip_off & 0x1fff) &&
!(fin->fin_fi.fi_fl & FI_SHORT)) {
if (nat->nat_inport)
@ -994,14 +1224,10 @@ fr_info_t *fin;
*/
void ip_natunload()
{
int s;
MUTEX_ENTER(&ipf_nat);
SPLNET(s);
(void) clear_natlist();
(void) flush_nattable();
(void) nat_clearlist();
(void) nat_flushtable();
(void) ap_unload();
SPLX(s)
MUTEX_EXIT(&ipf_nat);
}
@ -1013,10 +1239,12 @@ void ip_natunload()
void ip_natexpire()
{
register struct nat *nat, **natp;
#if defined(_KERNEL) && !SOLARIS
int s;
#endif
SPL_NET(s);
MUTEX_ENTER(&ipf_nat);
SPLNET(s);
for (natp = &nat_instances; (nat = *natp); ) {
if (--nat->nat_age) {
natp = &nat->nat_next;
@ -1029,34 +1257,83 @@ void ip_natexpire()
nat_delete(nat);
nat_stats.ns_expire++;
}
SPLX(s);
MUTEX_EXIT(&ipf_nat);
SPL_X(s);
}
/*
*/
#ifdef __STDC__
void ip_natsync(void *ifp)
#else
void ip_natsync(ifp)
void *ifp;
#endif
{
register nat_t *nat;
register u_long sum1, sum2, sumd;
struct in_addr in;
ipnat_t *np;
#if defined(_KERNEL) && !SOLARIS
int s;
#endif
SPL_NET(s);
MUTEX_ENTER(&ipf_nat);
for (nat = nat_instances; nat; nat = nat->nat_next)
if ((ifp == nat->nat_ifp) && (np = nat->nat_ptr))
if ((np->in_outmsk == 0xffffffff) && !np->in_nip) {
/*
* Change the map-to address to be the same
* as the new one.
*/
sum1 = nat->nat_outip.s_addr;
if (nat_ifpaddr(nat, ifp, &in) == -1)
nat->nat_outip.s_addr = htonl(in.s_addr);
sum2 = nat->nat_outip.s_addr;
/*
* Readjust the checksum adjustment to take
* into account the new IP#.
*
* Do it twice
*/
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
/* Do it twice */
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
/* Because ~1 == -2, We really need ~1 == -1 */
if (sum1 > sum2)
sum2--;
sumd = sum2 - sum1;
sumd = (sumd & 0xffff) + (sumd >> 16);
sumd += nat->nat_sumd;
nat->nat_sumd = (sumd & 0xffff) + (sumd >> 16);
}
MUTEX_EXIT(&ipf_nat);
SPL_X(s);
}
#ifdef IPFILTER_LOG
# ifdef __STDC__
void nat_log(struct nat *nat, u_short type)
# else
void nat_log(nat, type)
struct nat *nat;
u_short type;
# endif
{
struct ipnat *np;
struct natlog natl;
int rulen;
struct ipnat *np;
struct natlog natl;
void *items[1];
size_t sizes[1];
int rulen, types[1];
if (iplused[IPL_LOGNAT] + sizeof(natl) > IPLLOGSIZE) {
nat_stats.ns_logfail++;
return;
}
if (iplh[IPL_LOGNAT] == iplbuf[IPL_LOGNAT] + IPLLOGSIZE)
iplh[IPL_LOGNAT] = iplbuf[IPL_LOGNAT];
# ifdef sun
uniqtime(&natl);
# endif
# if BSD >= 199306 || defined(__FreeBSD__)
microtime((struct timeval *)&natl);
# endif
natl.nl_inip = nat->nat_inip;
natl.nl_outip = nat->nat_outip;
natl.nl_origip = nat->nat_oip;
@ -1074,12 +1351,10 @@ u_short type;
break;
}
}
items[0] = &natl;
sizes[0] = sizeof(natl);
types[0] = 0;
if (!fr_copytolog(IPL_LOGNAT, (char *)&natl, sizeof(natl))) {
iplused[IPL_LOGNAT] += sizeof(natl);
nat_stats.ns_logged++;
} else
nat_stats.ns_logfail++;
wakeup(iplbuf[IPL_LOGNAT]);
(void) ipllog(IPL_LOGNAT, 0, items, sizes, types, 1);
}
#endif

59
sys/netinet/ip_nat.h
View File

@ -1,21 +1,17 @@
/*
* (C)opyright 1995-1997 by Darren Reed.
* Copyright (C) 1995-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* @(#)ip_nat.h 1.5 2/4/96
* $Id: ip_nat.h,v 2.0.2.12 1997/05/24 07:35:20 darrenr Exp $
* $Id: ip_nat.h,v 2.0.2.23.2.1 1997/11/05 11:08:18 darrenr Exp $
*/
#ifndef __IP_NAT_H__
#define __IP_NAT_H__
#ifndef __IP_PROXY_H__
#include "netinet/ip_proxy.h"
#endif
#ifndef SOLARIS
#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
#endif
@ -29,7 +25,6 @@
#define SIOCGIPST _IOR('r', 85, struct ips_stat)
#define SIOCFLNAT _IOWR('r', 86, int)
#define SIOCCNATL _IOWR('r', 87, int)
#else
#define SIOCADNAT _IOW(r, 80, struct ipnat)
#define SIOCRMNAT _IOW(r, 81, struct ipnat)
@ -42,13 +37,16 @@
#endif
#define NAT_SIZE 367
#ifndef APR_LABELLEN
#define APR_LABELLEN 16
#endif
typedef struct nat {
u_long nat_age;
int nat_flags;
u_long nat_sumd;
u_long nat_ipsumd;
struct ipfr *nat_frag;
void *nat_data;
struct in_addr nat_inip;
struct in_addr nat_outip;
struct in_addr nat_oip; /* other ip */
@ -70,6 +68,7 @@ typedef struct nat {
typedef struct ipnat {
struct ipnat *in_next;
void *in_ifp;
void *in_apr;
u_int in_space;
u_int in_use;
struct in_addr in_nextip;
@ -78,7 +77,6 @@ typedef struct ipnat {
u_short in_port[2];
struct in_addr in_in[2];
struct in_addr in_out[2];
struct aproxy *in_apr;
int in_redir; /* 0 if it's a mapping, 1 if it's a hard redir */
char in_ifname[IFNAMSIZ];
char in_plabel[APR_LABELLEN]; /* proxy label */
@ -102,13 +100,16 @@ typedef struct ipnat {
#define NAT_BIMAP (NAT_MAP|NAT_REDIRECT)
#define IPN_CMPSIZ (sizeof(struct in_addr) * 4 + sizeof(u_short) * 3 + \
sizeof(int))
sizeof(int) + IFNAMSIZ + APR_LABELLEN + sizeof(char))
typedef struct natlookup {
struct in_addr nl_inip;
struct in_addr nl_outip;
struct in_addr nl_realip;
int nl_flags;
u_short nl_inport;
u_short nl_outport;
u_short nl_realport;
} natlookup_t;
typedef struct natstat {
@ -128,10 +129,10 @@ typedef struct natstat {
#define IPN_UDP 0x02
#define IPN_TCPUDP 0x03
#define IPN_DELETE 0x04
#define IPN_ICMPERR 0x08
typedef struct natlog {
struct timeval nl_tv;
struct in_addr nl_origip;
struct in_addr nl_outip;
struct in_addr nl_inip;
@ -150,22 +151,30 @@ typedef struct natlog {
#define NL_EXPIRE 0xffff
extern u_long fr_defnatage;
extern nat_t *nat_table[2][NAT_SIZE];
extern int nat_ioctl __P((caddr_t, int, int));
extern nat_t *nat_new __P((ipnat_t *, ip_t *, fr_info_t *, u_short, int));
extern nat_t *nat_outlookup __P((void *, int, struct in_addr, u_short,
extern void ip_natsync __P((void *));
extern u_long fr_defnatage;
extern u_long fr_defnaticmpage;
extern nat_t *nat_table[2][NAT_SIZE];
#if defined(__NetBSD__) || defined(__OpenBSD__)
extern int nat_ioctl __P((caddr_t, u_long, int));
#else
extern int nat_ioctl __P((caddr_t, int, int));
#endif
extern nat_t *nat_new __P((ipnat_t *, ip_t *, fr_info_t *, u_short, int));
extern nat_t *nat_outlookup __P((void *, int, struct in_addr, u_short,
struct in_addr, u_short));
extern nat_t *nat_inlookup __P((void *, int, struct in_addr, u_short,
extern nat_t *nat_inlookup __P((void *, int, struct in_addr, u_short,
struct in_addr, u_short));
extern nat_t *nat_lookupredir __P((natlookup_t *));
extern nat_t *nat_lookupmapip __P((void *, int, struct in_addr, u_short,
extern nat_t *nat_lookupredir __P((natlookup_t *));
extern nat_t *nat_lookupmapip __P((void *, int, struct in_addr, u_short,
struct in_addr, u_short));
extern nat_t *nat_icmpinlookup __P((ip_t *, fr_info_t *));
extern nat_t *nat_icmpin __P((ip_t *, fr_info_t *, int *));
extern int ip_natout __P((ip_t *, int, fr_info_t *));
extern int ip_natin __P((ip_t *, int, fr_info_t *));
extern void ip_natunload __P((void)), ip_natexpire __P((void));
extern void nat_log __P((struct nat *, u_short));
extern void fix_incksum __P((u_short *, u_long));
extern void fix_outcksum __P((u_short *, u_long));
extern int ip_natout __P((ip_t *, int, fr_info_t *));
extern int ip_natin __P((ip_t *, int, fr_info_t *));
extern void ip_natunload __P((void)), ip_natexpire __P((void));
extern void nat_log __P((struct nat *, u_short));
extern void fix_incksum __P((u_short *, u_long));
extern void fix_outcksum __P((u_short *, u_long));
#endif /* __IP_NAT_H__ */

79
sys/netinet/ip_proxy.c
View File

@ -1,12 +1,12 @@
/*
* (C)opyright 1997 by Darren Reed.
* Copyright (C) 1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
#if !defined(lint) && defined(LIBC_SCCS)
static char rcsid[] = "$Id: ip_proxy.c,v 2.0.2.3 1997/05/24 07:36:22 darrenr Exp $";
#if !defined(lint)
static const char rcsid[] = "@(#)$Id: ip_proxy.c,v 2.0.2.11.2.2 1997/11/12 10:54:11 darrenr Exp $";
#endif
#if defined(__FreeBSD__) && defined(KERNEL) && !defined(_KERNEL)
@ -26,13 +26,21 @@ static char rcsid[] = "$Id: ip_proxy.c,v 2.0.2.3 1997/05/24 07:36:22 darrenr Exp
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/uio.h>
#include <sys/protosw.h>
#ifndef linux
# include <sys/protosw.h>
#endif
#include <sys/socket.h>
#ifdef _KERNEL
# include <sys/systm.h>
#if defined(_KERNEL)
# if !defined(linux)
# include <sys/systm.h>
# else
# include <linux/string.h>
# endif
#endif
#if !defined(__SVR4) && !defined(__svr4__)
# include <sys/mbuf.h>
# ifndef linux
# include <sys/mbuf.h>
# endif
#else
# include <sys/byteorder.h>
# include <sys/dditypes.h>
@ -50,12 +58,14 @@ static char rcsid[] = "$Id: ip_proxy.c,v 2.0.2.3 1997/05/24 07:36:22 darrenr Exp
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#ifndef linux
# include <netinet/ip_var.h>
#endif
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/tcpip.h>
#include <netinet/ip_icmp.h>
#include "netinet/ip_compat.h"
#include <netinet/tcpip.h>
#include "netinet/ip_fil.h"
#include "netinet/ip_proxy.h"
#include "netinet/ip_nat.h"
@ -71,7 +81,7 @@ static ap_session_t *ap_new_session __P((aproxy_t *, ip_t *, tcphdr_t *,
#define AP_SESS_SIZE 53
#ifdef _KERNEL
#if defined(_KERNEL) && !defined(linux)
#include "netinet/ip_ftp_pxy.c"
#endif
@ -105,12 +115,15 @@ static ap_session_t *ap_find(ip, tcp)
ip_t *ip;
tcphdr_t *tcp;
{
struct in_addr src = ip->ip_src, dst = ip->ip_dst;
struct in_addr src, dst;
register u_long hv;
register u_short sp, dp;
register ap_session_t *aps;
register u_char p = ip->ip_p;
src = ip->ip_src, dst = ip->ip_dst;
sp = dp = 0; /* XXX gcc -Wunitialized */
hv = ip->ip_src.s_addr ^ ip->ip_dst.s_addr;
hv *= 651733;
if (tcp) {
@ -134,6 +147,12 @@ tcphdr_t *tcp;
return aps;
}
/*
* Allocate a new application proxy structure and fill it in with the
* relevant details. call the init function once complete, prior to
* returning.
*/
static ap_session_t *ap_new_session(apr, ip, tcp, fin, nat)
aproxy_t *apr;
ip_t *ip;
@ -163,20 +182,13 @@ nat_t *nat;
KMALLOC(aps, ap_session_t *, sizeof(*aps));
if (!aps)
return NULL;
bzero((char *)aps, sizeof(aps));
apr->apr_ref++;
bzero((char *)aps, sizeof(*aps));
aps->aps_apr = apr;
aps->aps_src = ip->ip_src;
aps->aps_dst = ip->ip_dst;
aps->aps_p = ip->ip_p;
aps->aps_tout = 1200; /* XXX */
if (tcp) {
if (ip->ip_p == IPPROTO_TCP) {
aps->aps_seqoff = 0;
aps->aps_ackoff = 0;
aps->aps_state[0] = 0;
aps->aps_state[1] = 0;
}
aps->aps_sport = tcp->th_sport;
aps->aps_dport = tcp->th_dport;
}
@ -189,6 +201,10 @@ nat_t *nat;
}
/*
* check to see if a packet should be passed through an active proxy routine
* if one has been setup for it.
*/
int ap_check(ip, tcp, fin, nat)
ip_t *ip;
tcphdr_t *tcp;
@ -204,9 +220,20 @@ nat_t *nat;
if ((aps = ap_find(ip, tcp)) ||
(aps = ap_new_session(nat->nat_ptr->in_apr, ip, tcp, fin, nat))) {
if (ip->ip_p == IPPROTO_TCP)
if (ip->ip_p == IPPROTO_TCP) {
/*
* verify that the checksum is correct. If not, then
* don't do anything with this packet.
*/
if (tcp->th_sum != fr_tcpsum(*(mb_t **)fin->fin_mp,
ip, tcp)) {
frstats[fin->fin_out].fr_tcpbad++;
return -1;
}
fr_tcp_age(&aps->aps_tout, aps->aps_state, ip, fin,
tcp->th_sport == aps->aps_sport);
}
apr = aps->aps_apr;
err = 0;
if (fin->fin_out) {
@ -219,7 +246,7 @@ nat_t *nat;
aps, nat);
}
if (err == 2) {
tcp->th_sum = fr_tcpsum(fin->fin_mp, ip, tcp);
tcp->th_sum = fr_tcpsum(*(mb_t **)fin->fin_mp, ip, tcp);
err = 0;
}
return err;
@ -229,15 +256,17 @@ nat_t *nat;
aproxy_t *ap_match(pr, name)
char pr;
u_char pr;
char *name;
{
aproxy_t *ap;
for (ap = ap_proxies; ap->apr_p; ap++)
if ((ap->apr_p == pr) &&
!strncmp(name, ap->apr_label, sizeof(ap->apr_label)))
!strncmp(name, ap->apr_label, sizeof(ap->apr_label))) {
ap->apr_ref++;
return ap;
}
return NULL;
}
@ -245,7 +274,7 @@ char *name;
void ap_free(ap)
aproxy_t *ap;
{
KFREE(ap);
ap->apr_ref--;
}
@ -264,7 +293,7 @@ void ap_unload()
int i;
for (i = 0; i < AP_SESS_SIZE; i++)
while (aps = ap_sess_tab[i]) {
while ((aps = ap_sess_tab[i])) {
ap_sess_tab[i] = aps->aps_next;
aps_free(aps);
}

35
sys/netinet/ip_proxy.h
View File

@ -1,11 +1,11 @@
/*
* (C)opyright 1997 by Darren Reed.
* Copyright (C) 1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* $Id: ip_proxy.h,v 2.0.2.2 1997/05/24 07:36:44 darrenr Exp $
* $Id: ip_proxy.h,v 2.0.2.10 1997/10/19 15:39:23 darrenr Exp $
*/
#ifndef __IP_PROXY_H__
@ -15,18 +15,21 @@
#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
#endif
#ifndef APR_LABELLEN
#define APR_LABELLEN 16
#endif
#define AP_SESS_SIZE 53
struct nat;
struct ipnat;
typedef struct ap_tcp {
u_short apt_sport; /* source port */
u_short apt_dport; /* destination port */
short apt_seqoff; /* sequence # difference */
short apt_ackoff; /* ack # difference */
tcp_seq apt_after; /* don't change seq-off until after this */
char apt_state[2]; /* connection state */
short apt_sel; /* seqoff/after set selector */
short apt_seqoff[2]; /* sequence # difference */
tcp_seq apt_after[2]; /* don't change seq-off until after this */
u_char apt_state[2]; /* connection state */
} ap_tcp_t;
typedef struct ap_udp {
@ -46,7 +49,7 @@ typedef struct ap_session {
u_int aps_flags;
QUAD_T aps_bytes; /* bytes sent */
QUAD_T aps_pkts; /* packets sent */
time_t aps_tout; /* time left before expiring */
u_long aps_tout; /* time left before expiring */
void *aps_data; /* private data */
int aps_psiz; /* size of private data */
struct ap_session *aps_next;
@ -54,16 +57,15 @@ typedef struct ap_session {
#define aps_sport aps_un.apu_tcp.apt_sport
#define aps_dport aps_un.apu_tcp.apt_dport
#define aps_sel aps_un.apu_tcp.apt_sel
#define aps_seqoff aps_un.apu_tcp.apt_seqoff
#define aps_ackoff aps_un.apu_tcp.apt_ackoff
#define aps_sumoff aps_un.apu_tcp.apt_sumoff
#define aps_state aps_un.apu_tcp.apt_state
#define aps_after aps_un.apu_tcp.apt_after
#define aps_state aps_un.apu_tcp.apt_state
typedef struct aproxy {
char apr_label[APR_LABELLEN]; /* Proxy label # */
char apr_p; /* protocol */
u_char apr_p; /* protocol */
int apr_ref; /* +1 per rule referencing it */
int apr_flags;
int (* apr_init) __P((fr_info_t *, ip_t *, tcphdr_t *,
@ -80,10 +82,11 @@ typedef struct aproxy {
extern ap_session_t *ap_sess_tab[AP_SESS_SIZE];
extern aproxy_t ap_proxies[];
extern void ap_unload __P((void));
extern void ap_free __P((aproxy_t *));
extern void aps_free __P((ap_session_t *));
extern int ap_check __P((ip_t *, tcphdr_t *, fr_info_t *, struct nat *));
extern aproxy_t *ap_match __P((char, char *));
extern int ap_ok __P((ip_t *, tcphdr_t *, struct ipnat *));
extern void ap_unload __P((void));
extern void ap_free __P((aproxy_t *));
extern void aps_free __P((ap_session_t *));
extern int ap_check __P((ip_t *, tcphdr_t *, fr_info_t *, struct nat *));
extern aproxy_t *ap_match __P((u_char, char *));
#endif /* __IP_PROXY_H__ */

172
sys/netinet/ip_state.c
View File

@ -1,23 +1,27 @@
/*
* (C)opyright 1995 by Darren Reed.
* Copyright (C) 1995-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
#if !defined(lint) && defined(LIBC_SCCS)
static char sccsid[] = "@(#)ip_state.c 1.8 6/5/96 (C) 1993-1995 Darren Reed";
static char rcsid[] = "$Id: ip_state.c,v 2.0.2.12 1997/05/24 07:34:10 darrenr Exp $";
#if !defined(lint)
static const char sccsid[] = "@(#)ip_state.c 1.8 6/5/96 (C) 1993-1995 Darren Reed";
static const char rcsid[] = "@(#)$Id: ip_state.c,v 2.0.2.24.2.3 1997/11/12 10:55:34 darrenr Exp $";
#endif
#if !defined(_KERNEL) && !defined(KERNEL)
#if !defined(_KERNEL) && !defined(KERNEL) && !defined(__KERNEL__)
# include <stdlib.h>
# include <string.h>
#else
# ifdef linux
# include <linux/kernel.h>
# include <linux/module.h>
# endif
#endif
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/file.h>
#if defined(KERNEL) && (__FreeBSD_version >= 220000)
# include <sys/filio.h>
@ -25,14 +29,19 @@ static char rcsid[] = "$Id: ip_state.c,v 2.0.2.12 1997/05/24 07:34:10 darrenr Ex
#else
# include <sys/ioctl.h>
#endif
#include <sys/time.h>
#include <sys/uio.h>
#ifndef linux
#include <sys/protosw.h>
#endif
#include <sys/socket.h>
#ifdef _KERNEL
#if defined(_KERNEL) && !defined(linux)
# include <sys/systm.h>
#endif
#if !defined(__SVR4) && !defined(__svr4__)
# include <sys/mbuf.h>
# ifndef linux
# include <sys/mbuf.h>
# endif
#else
# include <sys/filio.h>
# include <sys/byteorder.h>
@ -49,15 +58,19 @@ static char rcsid[] = "$Id: ip_state.c,v 2.0.2.12 1997/05/24 07:34:10 darrenr Ex
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#ifndef linux
# include <netinet/ip_var.h>
# include <netinet/tcp_fsm.h>
#endif
#include <netinet/udp.h>
#include <netinet/tcpip.h>
#include <netinet/ip_icmp.h>
#include "netinet/ip_compat.h"
#include <netinet/tcpip.h>
#include "netinet/ip_fil.h"
#include "netinet/ip_nat.h"
#include "netinet/ip_frag.h"
#include "netinet/ip_proxy.h"
#include "netinet/ip_state.h"
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
@ -68,7 +81,7 @@ static char rcsid[] = "$Id: ip_state.c,v 2.0.2.12 1997/05/24 07:34:10 darrenr Ex
ipstate_t *ips_table[IPSTATE_SIZE];
int ips_num = 0;
ips_stat_t ips_stats;
#if SOLARIS && defined(_KERNEL)
#if (SOLARIS || defined(__sgi)) && defined(_KERNEL)
extern kmutex_t ipf_state;
#endif
@ -92,25 +105,100 @@ ips_stat_t *fr_statetstats()
}
/*
* flush state tables. two actions currently defined:
* which == 0 : flush all state table entries
* which == 1 : flush TCP connections which have started to close but are
* stuck for some reason.
*/
int fr_state_flush(which)
int which;
{
register int i;
register ipstate_t *is, **isp;
#if defined(_KERNEL) && !SOLARIS
int s;
#endif
int delete, removed = 0;
SPL_NET(s);
MUTEX_ENTER(&ipf_state);
for (i = 0; i < IPSTATE_SIZE; i++)
for (isp = &ips_table[i]; (is = *isp); ) {
delete = 0;
switch (which)
{
case 0 :
delete = 1;
break;
case 1 :
if ((is->is_p == IPPROTO_TCP) &&
((is->is_state[0] <= TCPS_ESTABLISHED) &&
(is->is_state[1] > TCPS_ESTABLISHED)) ||
((is->is_state[1] <= TCPS_ESTABLISHED) &&
(is->is_state[0] > TCPS_ESTABLISHED)))
delete = 1;
break;
}
if (delete) {
*isp = is->is_next;
if (is->is_p == IPPROTO_TCP)
ips_stats.iss_fin++;
else
ips_stats.iss_expire++;
#ifdef IPFILTER_LOG
ipstate_log(is, ISL_FLUSH);
#endif
KFREE(is);
ips_num--;
removed++;
} else
isp = &is->is_next;
}
MUTEX_EXIT(&ipf_state);
SPL_X(s);
return removed;
}
int fr_state_ioctl(data, cmd, mode)
caddr_t data;
#if defined(__NetBSD__) || defined(__OpenBSD__)
u_long cmd;
#else
int cmd;
#endif
int mode;
{
int arg, ret, error = 0;
switch (cmd)
{
case SIOCIPFFL :
IRCOPY(data, (caddr_t)&arg, sizeof(arg));
if (arg == 0 || arg == 1) {
MUTEX_ENTER(&ipf_state);
ret = fr_state_flush(arg);
MUTEX_EXIT(&ipf_state);
IWCOPY((caddr_t)&ret, data, sizeof(ret));
} else
error = EINVAL;
break;
case SIOCGIPST :
IWCOPY((caddr_t)fr_statetstats(), data, sizeof(ips_stat_t));
break;
case FIONREAD :
#ifdef IPFILTER_LOG
*(int *)data = iplused[IPL_LOGSTATE];
IWCOPY((caddr_t)&iplused[IPL_LOGSTATE], (caddr_t)data,
sizeof(iplused[IPL_LOGSTATE]));
#endif
break;
default :
return -1;
return EINVAL;
}
return 0;
return error;
}
@ -183,7 +271,7 @@ u_int pass;
is->is_dwin = is->is_swin; /* start them the same */
ips_stats.iss_tcp++;
/*
* If we're creating state for a starting connectoin, start the
* If we're creating state for a starting connection, start the
* timer on it as we'll never see an error if it fails to
* connect.
*/
@ -255,17 +343,27 @@ u_short sport;
*/
seq = ntohl(tcp->th_seq);
ack = ntohl(tcp->th_ack);
if (sport == is->is_sport) {
source = (sport == is->is_sport);
if (!(tcp->th_flags & TH_ACK)) /* Pretend an ack was sent */
ack = source ? is->is_ack : is->is_seq;
if (source) {
if (!is->is_seq)
/*
* Must be an outgoing SYN-ACK in reply to a SYN.
*/
is->is_seq = seq;
seqskew = seq - is->is_seq;
ackskew = ack - is->is_ack;
} else {
seqskew = ack - is->is_seq;
if (!is->is_ack)
/*
* Must be a SYN-ACK in reply to a SYN.
*/
is->is_ack = seq;
ackskew = seq - is->is_ack;
seqskew = ack - is->is_seq;
}
/*
@ -281,7 +379,7 @@ u_short sport;
* window size of the connection, store these values and match
* the packet.
*/
if ((source = (sport == is->is_sport))) {
if (source) {
swin = is->is_swin;
dwin = is->is_dwin;
} else {
@ -440,16 +538,13 @@ void fr_stateunload()
{
register int i;
register ipstate_t *is, **isp;
int s;
MUTEX_ENTER(&ipf_state);
SPLNET(s);
for (i = 0; i < IPSTATE_SIZE; i++)
for (isp = &ips_table[i]; (is = *isp); ) {
*isp = is->is_next;
KFREE(is);
}
SPLX(s);
MUTEX_EXIT(&ipf_state);
}
@ -462,10 +557,12 @@ void fr_timeoutstate()
{
register int i;
register ipstate_t *is, **isp;
#if defined(_KERNEL) && !SOLARIS
int s;
#endif
SPL_NET(s);
MUTEX_ENTER(&ipf_state);
SPLNET(s);
for (i = 0; i < IPSTATE_SIZE; i++)
for (isp = &ips_table[i]; (is = *isp); )
if (is->is_age && !--is->is_age) {
@ -481,8 +578,8 @@ void fr_timeoutstate()
ips_num--;
} else
isp = &is->is_next;
SPLX(s);
MUTEX_EXIT(&ipf_state);
SPL_X(s);
}
@ -580,21 +677,10 @@ struct ipstate *is;
u_short type;
{
struct ipslog ipsl;
void *items[1];
size_t sizes[1];
int types[1];
if (iplused[IPL_LOGSTATE] + sizeof(ipsl) > IPLLOGSIZE) {
ips_stats.iss_logfail++;
return;
}
if (iplh[IPL_LOGSTATE] == iplbuf[IPL_LOGSTATE] + IPLLOGSIZE)
iplh[IPL_LOGSTATE] = iplbuf[IPL_LOGSTATE];
# ifdef sun
uniqtime(&ipsl);
# endif
# if BSD >= 199306 || defined(__FreeBSD__)
microtime((struct timeval *)&ipsl);
# endif
ipsl.isl_pkts = is->is_pkts;
ipsl.isl_bytes = is->is_bytes;
ipsl.isl_src = is->is_src;
@ -611,12 +697,10 @@ u_short type;
ipsl.isl_ps.isl_filler[0] = 0;
ipsl.isl_ps.isl_filler[1] = 0;
}
items[0] = &ipsl;
sizes[0] = sizeof(ipsl);
types[0] = 0;
if (!fr_copytolog(IPL_LOGSTATE, (char *)&ipsl, sizeof(ipsl))) {
iplused[IPL_LOGSTATE] += sizeof(ipsl);
ips_stats.iss_logged++;
} else
ips_stats.iss_logfail++;
wakeup(iplbuf[IPL_LOGSTATE]);
(void) ipllog(IPL_LOGSTATE, 0, items, sizes, types, 1);
}
#endif

43
sys/netinet/ip_state.h
View File

@ -1,12 +1,12 @@
/*
* (C)opyright 1995-1997 by Darren Reed.
* Copyright (C) 1995-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed
* $Id: ip_state.h,v 2.0.2.9 1997/05/24 07:35:11 darrenr Exp $
* $Id: ip_state.h,v 2.0.2.14.2.1 1997/11/06 21:23:15 darrenr Exp $
*/
#ifndef __IP_STATE_H__
#define __IP_STATE_H__
@ -73,7 +73,6 @@ typedef struct ipstate {
typedef struct ipslog {
struct timeval isl_tv;
U_QUAD_T isl_pkts;
U_QUAD_T isl_bytes;
struct in_addr isl_src;
@ -94,6 +93,7 @@ typedef struct ipslog {
#define ISL_NEW 0
#define ISL_EXPIRE 0xffff
#define ISL_FLUSH 0xfffe
typedef struct ips_stat {
@ -113,21 +113,26 @@ typedef struct ips_stat {
} ips_stat_t;
extern u_long fr_tcpidletimeout;
extern u_long fr_tcpclosewait;
extern u_long fr_tcplastack;
extern u_long fr_tcptimeout;
extern u_long fr_tcpclosed;
extern u_long fr_udptimeout;
extern u_long fr_icmptimeout;
extern int fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *,
extern u_long fr_tcpidletimeout;
extern u_long fr_tcpclosewait;
extern u_long fr_tcplastack;
extern u_long fr_tcptimeout;
extern u_long fr_tcpclosed;
extern u_long fr_udptimeout;
extern u_long fr_icmptimeout;
extern int fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *,
tcphdr_t *, u_short));
extern ips_stat_t *fr_statetstats __P((void));
extern int fr_addstate __P((ip_t *, fr_info_t *, u_int));
extern int fr_checkstate __P((ip_t *, fr_info_t *));
extern void fr_timeoutstate __P((void));
extern void fr_tcp_age __P((u_long *, u_char *, ip_t *, fr_info_t *, int));
extern void fr_stateunload __P((void));
extern void ipstate_log __P((struct ipstate *, u_short));
extern int fr_state_ioctl __P((caddr_t, int, int));
extern ips_stat_t *fr_statetstats __P((void));
extern int fr_addstate __P((ip_t *, fr_info_t *, u_int));
extern int fr_checkstate __P((ip_t *, fr_info_t *));
extern void fr_timeoutstate __P((void));
extern void fr_tcp_age __P((u_long *, u_char *, ip_t *, fr_info_t *, int));
extern int fr_state_flush __P((int));
extern void fr_stateunload __P((void));
extern void ipstate_log __P((struct ipstate *, u_short));
#if defined(__NetBSD__) || defined(__OpenBSD__)
extern int fr_state_ioctl __P((caddr_t, u_long, int));
#else
extern int fr_state_ioctl __P((caddr_t, int, int));
#endif
#endif /* __IP_STATE_H__ */

367
sys/netinet/mlf_ipl.c Normal file
View File

@ -0,0 +1,367 @@
/*
* Copyright (C) 1993-1997 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
/*
* 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
* its own major char number! Way cool patch!
*/
#include <sys/param.h>
#if defined(__FreeBSD__) && (__FreeBSD__ > 1)
# ifdef IPFILTER_LKM
# include <osreldate.h>
# define ACTUALLY_LKM_NOT_KERNEL
# else
# include <sys/osreldate.h>
# endif
#endif
#include <sys/systm.h>
#if defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)
# include <sys/conf.h>
# include <sys/kernel.h>
# ifdef DEVFS
# include <sys/devfsext.h>
# endif /*DEVFS*/
#endif
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/exec.h>
#include <sys/mbuf.h>
#if BSD >= 199506
# include <sys/sysctl.h>
#endif
#if (__FreeBSD_version >= 199511)
#include <net/if.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <net/route.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#endif
#if (__FreeBSD__ > 1)
# include <sys/sysent.h>
#endif
#include <sys/lkm.h>
#include "netinet/ipl.h"
#include "netinet/ip_compat.h"
#include "netinet/ip_fil.h"
#include "netinet/ip_state.h"
#include "netinet/ip_nat.h"
#include "netinet/ip_auth.h"
#include "netinet/ip_frag.h"
#if !defined(VOP_LEASE) && defined(LEASE_CHECK)
#define VOP_LEASE LEASE_CHECK
#endif
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
#endif
extern int lkmenodev __P((void));
static char *ipf_devfiles[] = { IPL_NAME, IPL_NAT, IPL_STATE, IPL_AUTH,
NULL };
static int if_ipl_unload __P((struct lkm_table *, int));
static int if_ipl_load __P((struct lkm_table *, int));
static int if_ipl_remove __P((void));
int xxxinit __P((struct lkm_table *, int, int));
struct cdevsw ipldevsw =
{
iplopen, /* open */
iplclose, /* close */
iplread, /* read */
(void *)nullop, /* write */
iplioctl, /* ioctl */
(void *)nullop, /* stop */
(void *)nullop, /* reset */
(void *)NULL, /* tty */
(void *)nullop, /* select */
(void *)nullop, /* mmap */
NULL /* strategy */
};
#ifdef SYSCTL_INT
SYSCTL_NODE(_net_inet, OID_AUTO, ipf, CTLFLAG_RW, 0, "IPF");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_flags, CTLFLAG_RW, &fr_flags, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_pass, CTLFLAG_RW, &fr_pass, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RW,
&fr_tcpidletimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RW,
&fr_tcpclosewait, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RW,
&fr_tcplastack, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RW,
&fr_tcptimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RW,
&fr_tcpclosed, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RW,
&fr_udptimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RW,
&fr_icmptimeout, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defnatage, CTLFLAG_RW,
&fr_defnatage, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_ipfrttl, CTLFLAG_RW,
&fr_ipfrttl, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_unreach, CTLFLAG_RW,
&ipl_unreach, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_inited, CTLFLAG_RD,
&ipl_inited, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authsize, CTLFLAG_RD,
&fr_authsize, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authused, CTLFLAG_RD,
&fr_authused, 0, "");
SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defaultauthage, CTLFLAG_RW,
&fr_defaultauthage, 0, "");
#endif
#if !defined(__FreeBSD_version) || (__FreeBSD_version < 220000)
int ipl_major = 0;
MOD_DEV(IPL_VERSION, LM_DT_CHAR, -1, &ipldevsw);
extern struct cdevsw cdevsw[];
extern int vd_unuseddev __P((void));
extern int nchrdev;
#else
int ipl_major = CDEV_MAJOR;
static struct cdevsw ipl_cdevsw = {
iplopen, iplclose, iplread, nowrite, /* 79 */
iplioctl, nostop, noreset, nodevtotty,
noselect, nommap, nostrategy, "ipl",
NULL, -1
};
#endif
static int iplaction __P((struct lkm_table *, int));
static int iplaction(lkmtp, cmd)
struct lkm_table *lkmtp;
int cmd;
{
#if !defined(__FreeBSD_version) || (__FreeBSD_version < 220000)
int i = ipl_major;
struct lkm_dev *args = lkmtp->private.lkm_dev;
#endif
int err = 0;
switch (cmd)
{
case LKM_E_LOAD :
if (lkmexists(lkmtp))
return EEXIST;
#if !defined(__FreeBSD_version) || (__FreeBSD_version < 220000)
for (i = 0; i < nchrdev; i++)
if (cdevsw[i].d_open == lkmenodev ||
cdevsw[i].d_open == iplopen)
break;
if (i == nchrdev) {
printf("IP Filter: No free cdevsw slots\n");
return ENODEV;
}
ipl_major = i;
args->lkm_offset = i; /* slot in cdevsw[] */
#endif
printf("IP Filter: loaded into slot %d\n", ipl_major);
return if_ipl_load(lkmtp, cmd);
break;
case LKM_E_UNLOAD :
err = if_ipl_unload(lkmtp, cmd);
if (!err)
printf("IP Filter: unloaded from slot %d\n",
ipl_major);
return err;
case LKM_E_STAT :
break;
default:
err = EIO;
break;
}
return 0;
}
static int if_ipl_remove __P((void))
{
char *name;
struct nameidata nd;
int error, i;
for (i = 0; (name = ipf_devfiles[i]); i++) {
NDINIT(&nd, DELETE, LOCKPARENT, UIO_SYSSPACE, name, curproc);
if ((error = namei(&nd)))
return (error);
VOP_LEASE(nd.ni_vp, curproc, curproc->p_ucred, LEASE_WRITE);
VOP_LOCK(nd.ni_vp);
VOP_LEASE(nd.ni_dvp, curproc, curproc->p_ucred, LEASE_WRITE);
(void) VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
}
return 0;
}
static int if_ipl_unload(lkmtp, cmd)
struct lkm_table *lkmtp;
int cmd;
{
int error = 0;
error = ipldetach();
if (!error)
error = if_ipl_remove();
return error;
}
static int if_ipl_load(lkmtp, cmd)
struct lkm_table *lkmtp;
int cmd;
{
struct nameidata nd;
struct vattr vattr;
int error = 0, fmode = S_IFCHR|0600, i;
char *name;
error = iplattach();
if (error)
return error;
(void) if_ipl_remove();
for (i = 0; (name = ipf_devfiles[i]); i++) {
NDINIT(&nd, CREATE, LOCKPARENT, UIO_SYSSPACE, name, curproc);
if ((error = namei(&nd)))
return error;
if (nd.ni_vp != NULL) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vrele(nd.ni_vp);
return (EEXIST);
}
VATTR_NULL(&vattr);
vattr.va_type = VCHR;
vattr.va_mode = (fmode & 07777);
vattr.va_rdev = (ipl_major << 8) | i;
VOP_LEASE(nd.ni_dvp, curproc, curproc->p_ucred, LEASE_WRITE);
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
if (error)
return error;
}
return 0;
}
#if defined(__FreeBSD_version) && (__FreeBSD_version < 220000)
/*
* strlen isn't present in 2.1.* kernels.
*/
size_t strlen(string)
char *string;
{
register char *s;
for (s = string; *s; s++)
;
return (size_t)(s - string);
}
int xxxinit(lkmtp, cmd, ver)
struct lkm_table *lkmtp;
int cmd, ver;
{
DISPATCH(lkmtp, cmd, ver, iplaction, iplaction, iplaction);
}
#else
# ifdef IPFILTER_LKM
# include <sys/exec.h>
MOD_DECL(if_ipl);
static struct lkm_dev _module = {
LM_DEV,
LKM_VERSION,
IPL_VERSION,
CDEV_MAJOR,
LM_DT_CHAR,
{ (void *)&ipl_cdevsw }
};
int if_ipl __P((struct lkm_table *, int, int));
int if_ipl(lkmtp, cmd, ver)
struct lkm_table *lkmtp;
int cmd, ver;
{
DISPATCH(lkmtp, cmd, ver, iplaction, iplaction, iplaction);
}
# else
#ifdef DEVFS
static void *ipf_devfs_token[IPL_LOGMAX + 1];
#endif
static ipl_devsw_installed = 0;
static void ipl_drvinit __P((void *unused))
{
dev_t dev;
#ifdef DEVFS
void **tp = ipf_devfs_token;
#endif
if (!ipl_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev, &ipl_cdevsw, NULL);
ipl_devsw_installed = 1;
#ifdef DEVFS
tp[IPL_LOGIPF] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGIPF,
DV_CHR, 0, 0, 0600,
"ipf", IPL_LOGIPF);
tp[IPL_LOGNAT] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGNAT,
DV_CHR, 0, 0, 0600,
"ipnat", IPL_LOGNAT);
tp[IPL_LOGSTATE] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGSTATE,
DV_CHR, 0, 0, 0600,
"ipstate", IPL_LOGSTATE);
tp[IPL_LOGAUTH] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGAUTH,
DV_CHR, 0, 0, 0600,
"ipstate", IPL_LOGAUTH);
#endif
}
}
SYSINIT(ipldev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ipl_drvinit,NULL)
# endif /* IPFILTER_LKM */
#endif /* _FreeBSD_version */