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pf_table.c
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pf_table.c
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/*-
* Copyright (c) 2002 Cedric Berger
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDERS 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.
*
* $OpenBSD: pf_table.c,v 1.79 2008/10/08 06:24:50 mcbride Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/refcount.h>
#include <sys/rwlock.h>
#include <sys/socket.h>
#include <vm/uma.h>
#include <net/if.h>
#include <net/vnet.h>
#include <net/pfvar.h>
#define ACCEPT_FLAGS(flags, oklist) \
do { \
if ((flags & ~(oklist)) & \
PFR_FLAG_ALLMASK) \
return (EINVAL); \
} while (0)
#define FILLIN_SIN(sin, addr) \
do { \
(sin).sin_len = sizeof(sin); \
(sin).sin_family = AF_INET; \
(sin).sin_addr = (addr); \
} while (0)
#define FILLIN_SIN6(sin6, addr) \
do { \
(sin6).sin6_len = sizeof(sin6); \
(sin6).sin6_family = AF_INET6; \
(sin6).sin6_addr = (addr); \
} while (0)
#define SWAP(type, a1, a2) \
do { \
type tmp = a1; \
a1 = a2; \
a2 = tmp; \
} while (0)
#define SUNION2PF(su, af) (((af)==AF_INET) ? \
(struct pf_addr *)&(su)->sin.sin_addr : \
(struct pf_addr *)&(su)->sin6.sin6_addr)
#define AF_BITS(af) (((af)==AF_INET)?32:128)
#define ADDR_NETWORK(ad) ((ad)->pfra_net < AF_BITS((ad)->pfra_af))
#define KENTRY_NETWORK(ke) ((ke)->pfrke_net < AF_BITS((ke)->pfrke_af))
#define KENTRY_RNF_ROOT(ke) \
((((struct radix_node *)(ke))->rn_flags & RNF_ROOT) != 0)
#define NO_ADDRESSES (-1)
#define ENQUEUE_UNMARKED_ONLY (1)
#define INVERT_NEG_FLAG (1)
struct pfr_walktree {
enum pfrw_op {
PFRW_MARK,
PFRW_SWEEP,
PFRW_ENQUEUE,
PFRW_GET_ADDRS,
PFRW_GET_ASTATS,
PFRW_POOL_GET,
PFRW_DYNADDR_UPDATE
} pfrw_op;
union {
struct pfr_addr *pfrw1_addr;
struct pfr_astats *pfrw1_astats;
struct pfr_kentryworkq *pfrw1_workq;
struct pfr_kentry *pfrw1_kentry;
struct pfi_dynaddr *pfrw1_dyn;
} pfrw_1;
int pfrw_free;
};
#define pfrw_addr pfrw_1.pfrw1_addr
#define pfrw_astats pfrw_1.pfrw1_astats
#define pfrw_workq pfrw_1.pfrw1_workq
#define pfrw_kentry pfrw_1.pfrw1_kentry
#define pfrw_dyn pfrw_1.pfrw1_dyn
#define pfrw_cnt pfrw_free
#define senderr(e) do { rv = (e); goto _bad; } while (0)
static MALLOC_DEFINE(M_PFTABLE, "pf_table", "pf(4) tables structures");
static VNET_DEFINE(uma_zone_t, pfr_kentry_z);
#define V_pfr_kentry_z VNET(pfr_kentry_z)
static VNET_DEFINE(uma_zone_t, pfr_kcounters_z);
#define V_pfr_kcounters_z VNET(pfr_kcounters_z)
static struct pf_addr pfr_ffaddr = {
.addr32 = { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff }
};
static void pfr_copyout_addr(struct pfr_addr *,
struct pfr_kentry *ke);
static int pfr_validate_addr(struct pfr_addr *);
static void pfr_enqueue_addrs(struct pfr_ktable *,
struct pfr_kentryworkq *, int *, int);
static void pfr_mark_addrs(struct pfr_ktable *);
static struct pfr_kentry
*pfr_lookup_addr(struct pfr_ktable *,
struct pfr_addr *, int);
static struct pfr_kentry *pfr_create_kentry(struct pfr_addr *);
static void pfr_destroy_kentries(struct pfr_kentryworkq *);
static void pfr_destroy_kentry(struct pfr_kentry *);
static void pfr_insert_kentries(struct pfr_ktable *,
struct pfr_kentryworkq *, long);
static void pfr_remove_kentries(struct pfr_ktable *,
struct pfr_kentryworkq *);
static void pfr_clstats_kentries(struct pfr_kentryworkq *, long,
int);
static void pfr_reset_feedback(struct pfr_addr *, int);
static void pfr_prepare_network(union sockaddr_union *, int, int);
static int pfr_route_kentry(struct pfr_ktable *,
struct pfr_kentry *);
static int pfr_unroute_kentry(struct pfr_ktable *,
struct pfr_kentry *);
static int pfr_walktree(struct radix_node *, void *);
static int pfr_validate_table(struct pfr_table *, int, int);
static int pfr_fix_anchor(char *);
static void pfr_commit_ktable(struct pfr_ktable *, long);
static void pfr_insert_ktables(struct pfr_ktableworkq *);
static void pfr_insert_ktable(struct pfr_ktable *);
static void pfr_setflags_ktables(struct pfr_ktableworkq *);
static void pfr_setflags_ktable(struct pfr_ktable *, int);
static void pfr_clstats_ktables(struct pfr_ktableworkq *, long,
int);
static void pfr_clstats_ktable(struct pfr_ktable *, long, int);
static struct pfr_ktable
*pfr_create_ktable(struct pfr_table *, long, int);
static void pfr_destroy_ktables(struct pfr_ktableworkq *, int);
static void pfr_destroy_ktable(struct pfr_ktable *, int);
static int pfr_ktable_compare(struct pfr_ktable *,
struct pfr_ktable *);
static struct pfr_ktable
*pfr_lookup_table(struct pfr_table *);
static void pfr_clean_node_mask(struct pfr_ktable *,
struct pfr_kentryworkq *);
static int pfr_table_count(struct pfr_table *, int);
static int pfr_skip_table(struct pfr_table *,
struct pfr_ktable *, int);
static struct pfr_kentry
*pfr_kentry_byidx(struct pfr_ktable *, int, int);
static RB_PROTOTYPE(pfr_ktablehead, pfr_ktable, pfrkt_tree, pfr_ktable_compare);
static RB_GENERATE(pfr_ktablehead, pfr_ktable, pfrkt_tree, pfr_ktable_compare);
struct pfr_ktablehead pfr_ktables;
struct pfr_table pfr_nulltable;
int pfr_ktable_cnt;
void
pfr_initialize(void)
{
V_pfr_kentry_z = uma_zcreate("pf table entries",
sizeof(struct pfr_kentry), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,
0);
V_pfr_kcounters_z = uma_zcreate("pf table counters",
sizeof(struct pfr_kcounters), NULL, NULL, NULL, NULL,
UMA_ALIGN_PTR, 0);
V_pf_limits[PF_LIMIT_TABLE_ENTRIES].zone = V_pfr_kentry_z;
V_pf_limits[PF_LIMIT_TABLE_ENTRIES].limit = PFR_KENTRY_HIWAT;
}
void
pfr_cleanup(void)
{
uma_zdestroy(V_pfr_kentry_z);
uma_zdestroy(V_pfr_kcounters_z);
}
int
pfr_clr_addrs(struct pfr_table *tbl, int *ndel, int flags)
{
struct pfr_ktable *kt;
struct pfr_kentryworkq workq;
PF_RULES_WASSERT();
ACCEPT_FLAGS(flags, PFR_FLAG_DUMMY);
if (pfr_validate_table(tbl, 0, flags & PFR_FLAG_USERIOCTL))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
if (kt->pfrkt_flags & PFR_TFLAG_CONST)
return (EPERM);
pfr_enqueue_addrs(kt, &workq, ndel, 0);
if (!(flags & PFR_FLAG_DUMMY)) {
pfr_remove_kentries(kt, &workq);
KASSERT(kt->pfrkt_cnt == 0, ("%s: non-null pfrkt_cnt", __func__));
}
return (0);
}
int
pfr_add_addrs(struct pfr_table *tbl, struct pfr_addr *addr, int size,
int *nadd, int flags)
{
struct pfr_ktable *kt, *tmpkt;
struct pfr_kentryworkq workq;
struct pfr_kentry *p, *q;
struct pfr_addr *ad;
int i, rv, xadd = 0;
long tzero = time_second;
PF_RULES_WASSERT();
ACCEPT_FLAGS(flags, PFR_FLAG_DUMMY | PFR_FLAG_FEEDBACK);
if (pfr_validate_table(tbl, 0, flags & PFR_FLAG_USERIOCTL))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
if (kt->pfrkt_flags & PFR_TFLAG_CONST)
return (EPERM);
tmpkt = pfr_create_ktable(&pfr_nulltable, 0, 0);
if (tmpkt == NULL)
return (ENOMEM);
SLIST_INIT(&workq);
for (i = 0, ad = addr; i < size; i++, ad++) {
if (pfr_validate_addr(ad))
senderr(EINVAL);
p = pfr_lookup_addr(kt, ad, 1);
q = pfr_lookup_addr(tmpkt, ad, 1);
if (flags & PFR_FLAG_FEEDBACK) {
if (q != NULL)
ad->pfra_fback = PFR_FB_DUPLICATE;
else if (p == NULL)
ad->pfra_fback = PFR_FB_ADDED;
else if (p->pfrke_not != ad->pfra_not)
ad->pfra_fback = PFR_FB_CONFLICT;
else
ad->pfra_fback = PFR_FB_NONE;
}
if (p == NULL && q == NULL) {
p = pfr_create_kentry(ad);
if (p == NULL)
senderr(ENOMEM);
if (pfr_route_kentry(tmpkt, p)) {
pfr_destroy_kentry(p);
ad->pfra_fback = PFR_FB_NONE;
} else {
SLIST_INSERT_HEAD(&workq, p, pfrke_workq);
xadd++;
}
}
}
pfr_clean_node_mask(tmpkt, &workq);
if (!(flags & PFR_FLAG_DUMMY))
pfr_insert_kentries(kt, &workq, tzero);
else
pfr_destroy_kentries(&workq);
if (nadd != NULL)
*nadd = xadd;
pfr_destroy_ktable(tmpkt, 0);
return (0);
_bad:
pfr_clean_node_mask(tmpkt, &workq);
pfr_destroy_kentries(&workq);
if (flags & PFR_FLAG_FEEDBACK)
pfr_reset_feedback(addr, size);
pfr_destroy_ktable(tmpkt, 0);
return (rv);
}
int
pfr_del_addrs(struct pfr_table *tbl, struct pfr_addr *addr, int size,
int *ndel, int flags)
{
struct pfr_ktable *kt;
struct pfr_kentryworkq workq;
struct pfr_kentry *p;
struct pfr_addr *ad;
int i, rv, xdel = 0, log = 1;
PF_RULES_WASSERT();
ACCEPT_FLAGS(flags, PFR_FLAG_DUMMY | PFR_FLAG_FEEDBACK);
if (pfr_validate_table(tbl, 0, flags & PFR_FLAG_USERIOCTL))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
if (kt->pfrkt_flags & PFR_TFLAG_CONST)
return (EPERM);
/*
* there are two algorithms to choose from here.
* with:
* n: number of addresses to delete
* N: number of addresses in the table
*
* one is O(N) and is better for large 'n'
* one is O(n*LOG(N)) and is better for small 'n'
*
* following code try to decide which one is best.
*/
for (i = kt->pfrkt_cnt; i > 0; i >>= 1)
log++;
if (size > kt->pfrkt_cnt/log) {
/* full table scan */
pfr_mark_addrs(kt);
} else {
/* iterate over addresses to delete */
for (i = 0, ad = addr; i < size; i++, ad++) {
if (pfr_validate_addr(ad))
return (EINVAL);
p = pfr_lookup_addr(kt, ad, 1);
if (p != NULL)
p->pfrke_mark = 0;
}
}
SLIST_INIT(&workq);
for (i = 0, ad = addr; i < size; i++, ad++) {
if (pfr_validate_addr(ad))
senderr(EINVAL);
p = pfr_lookup_addr(kt, ad, 1);
if (flags & PFR_FLAG_FEEDBACK) {
if (p == NULL)
ad->pfra_fback = PFR_FB_NONE;
else if (p->pfrke_not != ad->pfra_not)
ad->pfra_fback = PFR_FB_CONFLICT;
else if (p->pfrke_mark)
ad->pfra_fback = PFR_FB_DUPLICATE;
else
ad->pfra_fback = PFR_FB_DELETED;
}
if (p != NULL && p->pfrke_not == ad->pfra_not &&
!p->pfrke_mark) {
p->pfrke_mark = 1;
SLIST_INSERT_HEAD(&workq, p, pfrke_workq);
xdel++;
}
}
if (!(flags & PFR_FLAG_DUMMY))
pfr_remove_kentries(kt, &workq);
if (ndel != NULL)
*ndel = xdel;
return (0);
_bad:
if (flags & PFR_FLAG_FEEDBACK)
pfr_reset_feedback(addr, size);
return (rv);
}
int
pfr_set_addrs(struct pfr_table *tbl, struct pfr_addr *addr, int size,
int *size2, int *nadd, int *ndel, int *nchange, int flags,
u_int32_t ignore_pfrt_flags)
{
struct pfr_ktable *kt, *tmpkt;
struct pfr_kentryworkq addq, delq, changeq;
struct pfr_kentry *p, *q;
struct pfr_addr ad;
int i, rv, xadd = 0, xdel = 0, xchange = 0;
long tzero = time_second;
PF_RULES_WASSERT();
ACCEPT_FLAGS(flags, PFR_FLAG_DUMMY | PFR_FLAG_FEEDBACK);
if (pfr_validate_table(tbl, ignore_pfrt_flags, flags &
PFR_FLAG_USERIOCTL))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
if (kt->pfrkt_flags & PFR_TFLAG_CONST)
return (EPERM);
tmpkt = pfr_create_ktable(&pfr_nulltable, 0, 0);
if (tmpkt == NULL)
return (ENOMEM);
pfr_mark_addrs(kt);
SLIST_INIT(&addq);
SLIST_INIT(&delq);
SLIST_INIT(&changeq);
for (i = 0; i < size; i++) {
/*
* XXXGL: undertand pf_if usage of this function
* and make ad a moving pointer
*/
bcopy(addr + i, &ad, sizeof(ad));
if (pfr_validate_addr(&ad))
senderr(EINVAL);
ad.pfra_fback = PFR_FB_NONE;
p = pfr_lookup_addr(kt, &ad, 1);
if (p != NULL) {
if (p->pfrke_mark) {
ad.pfra_fback = PFR_FB_DUPLICATE;
goto _skip;
}
p->pfrke_mark = 1;
if (p->pfrke_not != ad.pfra_not) {
SLIST_INSERT_HEAD(&changeq, p, pfrke_workq);
ad.pfra_fback = PFR_FB_CHANGED;
xchange++;
}
} else {
q = pfr_lookup_addr(tmpkt, &ad, 1);
if (q != NULL) {
ad.pfra_fback = PFR_FB_DUPLICATE;
goto _skip;
}
p = pfr_create_kentry(&ad);
if (p == NULL)
senderr(ENOMEM);
if (pfr_route_kentry(tmpkt, p)) {
pfr_destroy_kentry(p);
ad.pfra_fback = PFR_FB_NONE;
} else {
SLIST_INSERT_HEAD(&addq, p, pfrke_workq);
ad.pfra_fback = PFR_FB_ADDED;
xadd++;
}
}
_skip:
if (flags & PFR_FLAG_FEEDBACK)
bcopy(&ad, addr + i, sizeof(ad));
}
pfr_enqueue_addrs(kt, &delq, &xdel, ENQUEUE_UNMARKED_ONLY);
if ((flags & PFR_FLAG_FEEDBACK) && *size2) {
if (*size2 < size+xdel) {
*size2 = size+xdel;
senderr(0);
}
i = 0;
SLIST_FOREACH(p, &delq, pfrke_workq) {
pfr_copyout_addr(&ad, p);
ad.pfra_fback = PFR_FB_DELETED;
bcopy(&ad, addr + size + i, sizeof(ad));
i++;
}
}
pfr_clean_node_mask(tmpkt, &addq);
if (!(flags & PFR_FLAG_DUMMY)) {
pfr_insert_kentries(kt, &addq, tzero);
pfr_remove_kentries(kt, &delq);
pfr_clstats_kentries(&changeq, tzero, INVERT_NEG_FLAG);
} else
pfr_destroy_kentries(&addq);
if (nadd != NULL)
*nadd = xadd;
if (ndel != NULL)
*ndel = xdel;
if (nchange != NULL)
*nchange = xchange;
if ((flags & PFR_FLAG_FEEDBACK) && size2)
*size2 = size+xdel;
pfr_destroy_ktable(tmpkt, 0);
return (0);
_bad:
pfr_clean_node_mask(tmpkt, &addq);
pfr_destroy_kentries(&addq);
if (flags & PFR_FLAG_FEEDBACK)
pfr_reset_feedback(addr, size);
pfr_destroy_ktable(tmpkt, 0);
return (rv);
}
int
pfr_tst_addrs(struct pfr_table *tbl, struct pfr_addr *addr, int size,
int *nmatch, int flags)
{
struct pfr_ktable *kt;
struct pfr_kentry *p;
struct pfr_addr *ad;
int i, xmatch = 0;
PF_RULES_RASSERT();
ACCEPT_FLAGS(flags, PFR_FLAG_REPLACE);
if (pfr_validate_table(tbl, 0, 0))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
for (i = 0, ad = addr; i < size; i++, ad++) {
if (pfr_validate_addr(ad))
return (EINVAL);
if (ADDR_NETWORK(ad))
return (EINVAL);
p = pfr_lookup_addr(kt, ad, 0);
if (flags & PFR_FLAG_REPLACE)
pfr_copyout_addr(ad, p);
ad->pfra_fback = (p == NULL) ? PFR_FB_NONE :
(p->pfrke_not ? PFR_FB_NOTMATCH : PFR_FB_MATCH);
if (p != NULL && !p->pfrke_not)
xmatch++;
}
if (nmatch != NULL)
*nmatch = xmatch;
return (0);
}
int
pfr_get_addrs(struct pfr_table *tbl, struct pfr_addr *addr, int *size,
int flags)
{
struct pfr_ktable *kt;
struct pfr_walktree w;
int rv;
PF_RULES_RASSERT();
ACCEPT_FLAGS(flags, 0);
if (pfr_validate_table(tbl, 0, 0))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
if (kt->pfrkt_cnt > *size) {
*size = kt->pfrkt_cnt;
return (0);
}
bzero(&w, sizeof(w));
w.pfrw_op = PFRW_GET_ADDRS;
w.pfrw_addr = addr;
w.pfrw_free = kt->pfrkt_cnt;
rv = kt->pfrkt_ip4->rnh_walktree(kt->pfrkt_ip4, pfr_walktree, &w);
if (!rv)
rv = kt->pfrkt_ip6->rnh_walktree(kt->pfrkt_ip6, pfr_walktree,
&w);
if (rv)
return (rv);
KASSERT(w.pfrw_free == 0, ("%s: corruption detected (%d)", __func__,
w.pfrw_free));
*size = kt->pfrkt_cnt;
return (0);
}
int
pfr_get_astats(struct pfr_table *tbl, struct pfr_astats *addr, int *size,
int flags)
{
struct pfr_ktable *kt;
struct pfr_walktree w;
struct pfr_kentryworkq workq;
int rv;
long tzero = time_second;
PF_RULES_RASSERT();
/* XXX PFR_FLAG_CLSTATS disabled */
ACCEPT_FLAGS(flags, 0);
if (pfr_validate_table(tbl, 0, 0))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
if (kt->pfrkt_cnt > *size) {
*size = kt->pfrkt_cnt;
return (0);
}
bzero(&w, sizeof(w));
w.pfrw_op = PFRW_GET_ASTATS;
w.pfrw_astats = addr;
w.pfrw_free = kt->pfrkt_cnt;
rv = kt->pfrkt_ip4->rnh_walktree(kt->pfrkt_ip4, pfr_walktree, &w);
if (!rv)
rv = kt->pfrkt_ip6->rnh_walktree(kt->pfrkt_ip6, pfr_walktree,
&w);
if (!rv && (flags & PFR_FLAG_CLSTATS)) {
pfr_enqueue_addrs(kt, &workq, NULL, 0);
pfr_clstats_kentries(&workq, tzero, 0);
}
if (rv)
return (rv);
if (w.pfrw_free) {
printf("pfr_get_astats: corruption detected (%d).\n",
w.pfrw_free);
return (ENOTTY);
}
*size = kt->pfrkt_cnt;
return (0);
}
int
pfr_clr_astats(struct pfr_table *tbl, struct pfr_addr *addr, int size,
int *nzero, int flags)
{
struct pfr_ktable *kt;
struct pfr_kentryworkq workq;
struct pfr_kentry *p;
struct pfr_addr *ad;
int i, rv, xzero = 0;
PF_RULES_WASSERT();
ACCEPT_FLAGS(flags, PFR_FLAG_DUMMY | PFR_FLAG_FEEDBACK);
if (pfr_validate_table(tbl, 0, 0))
return (EINVAL);
kt = pfr_lookup_table(tbl);
if (kt == NULL || !(kt->pfrkt_flags & PFR_TFLAG_ACTIVE))
return (ESRCH);
SLIST_INIT(&workq);
for (i = 0, ad = addr; i < size; i++, ad++) {
if (pfr_validate_addr(ad))
senderr(EINVAL);
p = pfr_lookup_addr(kt, ad, 1);
if (flags & PFR_FLAG_FEEDBACK) {
ad->pfra_fback = (p != NULL) ?
PFR_FB_CLEARED : PFR_FB_NONE;
}
if (p != NULL) {
SLIST_INSERT_HEAD(&workq, p, pfrke_workq);
xzero++;
}
}
if (!(flags & PFR_FLAG_DUMMY))
pfr_clstats_kentries(&workq, 0, 0);
if (nzero != NULL)
*nzero = xzero;
return (0);
_bad:
if (flags & PFR_FLAG_FEEDBACK)
pfr_reset_feedback(addr, size);
return (rv);
}
static int
pfr_validate_addr(struct pfr_addr *ad)
{
int i;
switch (ad->pfra_af) {
#ifdef INET
case AF_INET:
if (ad->pfra_net > 32)
return (-1);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
if (ad->pfra_net > 128)
return (-1);
break;
#endif /* INET6 */
default:
return (-1);
}
if (ad->pfra_net < 128 &&
(((caddr_t)ad)[ad->pfra_net/8] & (0xFF >> (ad->pfra_net%8))))
return (-1);
for (i = (ad->pfra_net+7)/8; i < sizeof(ad->pfra_u); i++)
if (((caddr_t)ad)[i])
return (-1);
if (ad->pfra_not && ad->pfra_not != 1)
return (-1);
if (ad->pfra_fback)
return (-1);
return (0);
}
static void
pfr_enqueue_addrs(struct pfr_ktable *kt, struct pfr_kentryworkq *workq,
int *naddr, int sweep)
{
struct pfr_walktree w;
SLIST_INIT(workq);
bzero(&w, sizeof(w));
w.pfrw_op = sweep ? PFRW_SWEEP : PFRW_ENQUEUE;
w.pfrw_workq = workq;
if (kt->pfrkt_ip4 != NULL)
if (kt->pfrkt_ip4->rnh_walktree(kt->pfrkt_ip4, pfr_walktree,
&w))
printf("pfr_enqueue_addrs: IPv4 walktree failed.\n");
if (kt->pfrkt_ip6 != NULL)
if (kt->pfrkt_ip6->rnh_walktree(kt->pfrkt_ip6, pfr_walktree,
&w))
printf("pfr_enqueue_addrs: IPv6 walktree failed.\n");
if (naddr != NULL)
*naddr = w.pfrw_cnt;
}
static void
pfr_mark_addrs(struct pfr_ktable *kt)
{
struct pfr_walktree w;
bzero(&w, sizeof(w));
w.pfrw_op = PFRW_MARK;
if (kt->pfrkt_ip4->rnh_walktree(kt->pfrkt_ip4, pfr_walktree, &w))
printf("pfr_mark_addrs: IPv4 walktree failed.\n");
if (kt->pfrkt_ip6->rnh_walktree(kt->pfrkt_ip6, pfr_walktree, &w))
printf("pfr_mark_addrs: IPv6 walktree failed.\n");
}
static struct pfr_kentry *
pfr_lookup_addr(struct pfr_ktable *kt, struct pfr_addr *ad, int exact)
{
union sockaddr_union sa, mask;
struct radix_node_head *head = NULL;
struct pfr_kentry *ke;
PF_RULES_ASSERT();
bzero(&sa, sizeof(sa));
if (ad->pfra_af == AF_INET) {
FILLIN_SIN(sa.sin, ad->pfra_ip4addr);
head = kt->pfrkt_ip4;
} else if ( ad->pfra_af == AF_INET6 ) {
FILLIN_SIN6(sa.sin6, ad->pfra_ip6addr);
head = kt->pfrkt_ip6;
}
if (ADDR_NETWORK(ad)) {
pfr_prepare_network(&mask, ad->pfra_af, ad->pfra_net);
ke = (struct pfr_kentry *)rn_lookup(&sa, &mask, head);
if (ke && KENTRY_RNF_ROOT(ke))
ke = NULL;
} else {
ke = (struct pfr_kentry *)rn_match(&sa, head);
if (ke && KENTRY_RNF_ROOT(ke))
ke = NULL;
if (exact && ke && KENTRY_NETWORK(ke))
ke = NULL;
}
return (ke);
}
static struct pfr_kentry *
pfr_create_kentry(struct pfr_addr *ad)
{
struct pfr_kentry *ke;
ke = uma_zalloc(V_pfr_kentry_z, M_NOWAIT | M_ZERO);
if (ke == NULL)
return (NULL);
if (ad->pfra_af == AF_INET)
FILLIN_SIN(ke->pfrke_sa.sin, ad->pfra_ip4addr);
else if (ad->pfra_af == AF_INET6)
FILLIN_SIN6(ke->pfrke_sa.sin6, ad->pfra_ip6addr);
ke->pfrke_af = ad->pfra_af;
ke->pfrke_net = ad->pfra_net;
ke->pfrke_not = ad->pfra_not;
return (ke);
}
static void
pfr_destroy_kentries(struct pfr_kentryworkq *workq)
{
struct pfr_kentry *p, *q;
for (p = SLIST_FIRST(workq); p != NULL; p = q) {
q = SLIST_NEXT(p, pfrke_workq);
pfr_destroy_kentry(p);
}
}
static void
pfr_destroy_kentry(struct pfr_kentry *ke)
{
if (ke->pfrke_counters)
uma_zfree(V_pfr_kcounters_z, ke->pfrke_counters);
uma_zfree(V_pfr_kentry_z, ke);
}
static void
pfr_insert_kentries(struct pfr_ktable *kt,
struct pfr_kentryworkq *workq, long tzero)
{
struct pfr_kentry *p;
int rv, n = 0;
SLIST_FOREACH(p, workq, pfrke_workq) {
rv = pfr_route_kentry(kt, p);
if (rv) {
printf("pfr_insert_kentries: cannot route entry "
"(code=%d).\n", rv);
break;
}
p->pfrke_tzero = tzero;
n++;
}
kt->pfrkt_cnt += n;
}
int
pfr_insert_kentry(struct pfr_ktable *kt, struct pfr_addr *ad, long tzero)
{
struct pfr_kentry *p;
int rv;
p = pfr_lookup_addr(kt, ad, 1);
if (p != NULL)
return (0);
p = pfr_create_kentry(ad);
if (p == NULL)
return (ENOMEM);
rv = pfr_route_kentry(kt, p);
if (rv)
return (rv);
p->pfrke_tzero = tzero;
kt->pfrkt_cnt++;
return (0);
}
static void
pfr_remove_kentries(struct pfr_ktable *kt,
struct pfr_kentryworkq *workq)
{
struct pfr_kentry *p;
int n = 0;
SLIST_FOREACH(p, workq, pfrke_workq) {
pfr_unroute_kentry(kt, p);
n++;
}
kt->pfrkt_cnt -= n;
pfr_destroy_kentries(workq);
}
static void
pfr_clean_node_mask(struct pfr_ktable *kt,
struct pfr_kentryworkq *workq)
{
struct pfr_kentry *p;
SLIST_FOREACH(p, workq, pfrke_workq)
pfr_unroute_kentry(kt, p);
}
static void
pfr_clstats_kentries(struct pfr_kentryworkq *workq, long tzero, int negchange)
{
struct pfr_kentry *p;
SLIST_FOREACH(p, workq, pfrke_workq) {
if (negchange)
p->pfrke_not = !p->pfrke_not;
if (p->pfrke_counters) {
uma_zfree(V_pfr_kcounters_z, p->pfrke_counters);
p->pfrke_counters = NULL;
}
p->pfrke_tzero = tzero;
}
}
static void
pfr_reset_feedback(struct pfr_addr *addr, int size)
{
struct pfr_addr *ad;
int i;
for (i = 0, ad = addr; i < size; i++, ad++)
ad->pfra_fback = PFR_FB_NONE;
}
static void
pfr_prepare_network(union sockaddr_union *sa, int af, int net)
{
int i;
bzero(sa, sizeof(*sa));
if (af == AF_INET) {
sa->sin.sin_len = sizeof(sa->sin);
sa->sin.sin_family = AF_INET;
sa->sin.sin_addr.s_addr = net ? htonl(-1 << (32-net)) : 0;
} else if (af == AF_INET6) {
sa->sin6.sin6_len = sizeof(sa->sin6);
sa->sin6.sin6_family = AF_INET6;
for (i = 0; i < 4; i++) {
if (net <= 32) {
sa->sin6.sin6_addr.s6_addr32[i] =
net ? htonl(-1 << (32-net)) : 0;
break;
}
sa->sin6.sin6_addr.s6_addr32[i] = 0xFFFFFFFF;
net -= 32;
}
}
}
static int
pfr_route_kentry(struct pfr_ktable *kt, struct pfr_kentry *ke)
{
union sockaddr_union mask;
struct radix_node *rn;
struct radix_node_head *head = NULL;
PF_RULES_WASSERT();
bzero(ke->pfrke_node, sizeof(ke->pfrke_node));
if (ke->pfrke_af == AF_INET)
head = kt->pfrkt_ip4;
else if (ke->pfrke_af == AF_INET6)
head = kt->pfrkt_ip6;
if (KENTRY_NETWORK(ke)) {
pfr_prepare_network(&mask, ke->pfrke_af, ke->pfrke_net);
rn = rn_addroute(&ke->pfrke_sa, &mask, head, ke->pfrke_node);
} else
rn = rn_addroute(&ke->pfrke_sa, NULL, head, ke->pfrke_node);
return (rn == NULL ? -1 : 0);
}
static int
pfr_unroute_kentry(struct pfr_ktable *kt, struct pfr_kentry *ke)
{
union sockaddr_union mask;
struct radix_node *rn;
struct radix_node_head *head = NULL;
if (ke->pfrke_af == AF_INET)
head = kt->pfrkt_ip4;
else if (ke->pfrke_af == AF_INET6)
head = kt->pfrkt_ip6;
if (KENTRY_NETWORK(ke)) {
pfr_prepare_network(&mask, ke->pfrke_af, ke->pfrke_net);
rn = rn_delete(&ke->pfrke_sa, &mask, head);
} else
rn = rn_delete(&ke->pfrke_sa, NULL, head);
if (rn == NULL) {
printf("pfr_unroute_kentry: delete failed.\n");
return (-1);
}
return (0);
}
static void
pfr_copyout_addr(struct pfr_addr *ad, struct pfr_kentry *ke)
{
bzero(ad, sizeof(*ad));
if (ke == NULL)
return;
ad->pfra_af = ke->pfrke_af;
ad->pfra_net = ke->pfrke_net;
ad->pfra_not = ke->pfrke_not;
if (ad->pfra_af == AF_INET)
ad->pfra_ip4addr = ke->pfrke_sa.sin.sin_addr;
else if (ad->pfra_af == AF_INET6)
ad->pfra_ip6addr = ke->pfrke_sa.sin6.sin6_addr;
}
static int
pfr_walktree(struct radix_node *rn, void *arg)
{
struct pfr_kentry *ke = (struct pfr_kentry *)rn;
struct pfr_walktree *w = arg;
switch (w->pfrw_op) {
case PFRW_MARK:
ke->pfrke_mark = 0;
break;
case PFRW_SWEEP: