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2bbe8ffc9d
freebsd-dev/sys/contrib/pf/net/pf_ioctl.c
Max Laier 2bbe8ffc9d Bring diff from the security/pf port. This has code been tested as a port 
for a long time and is run in production use. This is the code present in
portversion 2.03 with some additional tweaks.

The rather extensive diff accounts for:
 - locking (to enable pf to work with a giant-free netstack)
 - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off
 - conversion from pool(9) to zone(9)
 - api differences etc.

Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00

3293 lines
77 KiB
C
Raw Blame History

/* $FreeBSD$ */
/* $OpenBSD: pf_ioctl.c,v 1.81 2003/08/22 21:50:34 david Exp $ */
/*
* Copyright (c) 2001 Daniel Hartmeier
* 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.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*
*/
#if defined(__FreeBSD__)
#include "opt_inet.h"
#include "opt_inet6.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/filio.h>
#include <sys/fcntl.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <sys/malloc.h>
#if defined(__FreeBSD__)
#include <sys/conf.h>
#else
#include <sys/timeout.h>
#include <sys/pool.h>
#endif
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip_icmp.h>
#include <net/pfvar.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet/in_pcb.h>
#if defined(__FreeBSD__) && (__FreeBSD_version < 501108)
#include <netinet6/ip6protosw.h>
#endif
#endif /* INET6 */
#ifdef ALTQ
#include <altq/altq.h>
#endif
#if defined(__FreeBSD__)
#if (__FreeBSD_version >= 500112)
#include <sys/limits.h>
#else
#include <machine/limits.h>
#endif
#include <sys/lock.h>
#include <sys/mutex.h>
#if __FreeBSD_version < 501108
#include <sys/protosw.h>
#endif
#include <net/pfil.h>
#endif /* __FreeBSD__ */
#if defined(__FreeBSD__)
void init_zone_var(void);
void cleanup_pf_zone(void);
int pfattach(void);
#else
void pfattach(int);
int pfopen(dev_t, int, int, struct proc *);
int pfclose(dev_t, int, int, struct proc *);
#endif
struct pf_pool *pf_get_pool(char *, char *, u_int32_t,
u_int8_t, u_int8_t, u_int8_t, u_int8_t, u_int8_t);
int pf_get_ruleset_number(u_int8_t);
void pf_init_ruleset(struct pf_ruleset *);
void pf_mv_pool(struct pf_palist *, struct pf_palist *);
void pf_empty_pool(struct pf_palist *);
#if defined(__FreeBSD__)
int pfioctl(dev_t, u_long, caddr_t, int, struct thread *);
#else
int pfioctl(dev_t, u_long, caddr_t, int, struct proc *);
#endif
#if defined(__FreeBSD__)
extern struct callout pf_expire_to;
#if __FreeBSD_version < 501108
extern struct protosw inetsw[];
#endif
#else
extern struct timeout pf_expire_to;
#endif
struct pf_rule pf_default_rule;
#define TAGID_MAX 50000
TAILQ_HEAD(pf_tags, pf_tagname) pf_tags = TAILQ_HEAD_INITIALIZER(pf_tags);
#define DPFPRINTF(n, x) if (pf_status.debug >= (n)) printf x
#if defined(__FreeBSD__)
static dev_t pf_dev;
/*
* XXX - These are new and need to be checked when moveing to a new version
*/
static int pf_beginrules(void *addr);
static int pf_commitrules(void *addr);
#if defined(ALTQ)
static int pf_beginaltqs(void *addr);
static int pf_commitaltqs(void *addr);
static int pf_stopaltq(void);
#endif
static void pf_clearstates(void);
static int pf_clear_tables(void *addr);
/*
* XXX - These are new and need to be checked when moveing to a new version
*/
#if (__FreeBSD_version < 501108)
static int pf_check_in(void *ip, int hlen, struct ifnet *ifp, int dir,
struct mbuf **m);
static int pf_check_out(void *ip, int hlen, struct ifnet *ifp, int dir,
struct mbuf **m);
#if defined(INET6)
static int pf_check6_in(void *ip, int hlen, struct ifnet *ifp, int dir,
struct mbuf **m);
static int pf_check6_out(void *ip, int hlen, struct ifnet *ifp, int dir,
struct mbuf **m);
#endif
#else /* (__FreeBSD_version >= 501108) */
static int pf_check_in(void *arg, struct mbuf **m, struct ifnet *ifp,
int dir);
static int pf_check_out(void *arg, struct mbuf **m, struct ifnet *ifp,
int dir);
#if defined(INET6)
static int pf_check6_in(void *arg, struct mbuf **m, struct ifnet *ifp,
int dir);
static int pf_check6_out(void *arg, struct mbuf **m, struct ifnet *ifp,
int dir);
#endif
#endif /* (__FreeBSD_version >= 501108) */
static int hook_pf(void);
static int dehook_pf(void);
static int shutdown_pf(void);
static int pf_load(void);
static int pf_unload(void);
static struct cdevsw pf_cdevsw = {
#if (__FreeBSD_version < 500105)
/* open */ noopen,
/* close */ noclose,
/* read */ noread,
/* write */ nowrite,
/* ioctl */ pfioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ PF_NAME,
/* maj */ PF_CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* kqfilter */ nokqfilter,
#elif (__FreeBSD_version < 501110)
.d_open = noopen,
.d_close = noclose,
.d_read = noread,
.d_write = nowrite,
.d_ioctl = pfioctl,
.d_poll = nopoll,
.d_mmap = nommap,
.d_strategy = nostrategy,
.d_name = PF_NAME,
.d_maj = MAJOR_AUTO, /* PF_CDEV_MAJOR */
.d_dump = nodump,
.d_flags = 0,
.d_kqfilter = nokqfilter,
#else
.d_ioctl = pfioctl,
.d_name = PF_NAME,
.d_version = D_VERSION,
#endif
};
#endif /* __FreeBSD__ */
#if defined(__FreeBSD__)
static volatile int pf_pfil_hooked = 0;
struct mtx pf_task_mtx;
void
init_pf_mutex(void)
{
mtx_init(&pf_task_mtx, "pf task mtx", NULL, MTX_DEF);
/*
* pf_altq_mtx is initialized at altq_subr.c.
*
* #if defined(ALTQ) && !defined(ALTQ3_COMPAT)
* mtx_init(&pf_altq_mtx, "pf altq mtx", NULL, MTX_DEF);
* #endif
*/
}
void
destroy_pf_mutex(void)
{
mtx_destroy(&pf_task_mtx);
/*
* pf_altq_mtx is initialized at altq_subr.c.
*
* #if defined(ALTQ) && !defined(ALTQ3_COMPAT)
* mtx_destroy(&pf_altq_mtx);
* #endif
*/
}
void
init_zone_var(void)
{
pf_tree_pl = pf_rule_pl = pf_addr_pl = NULL;
pf_state_pl = pf_altq_pl = pf_pooladdr_pl = NULL;
pf_frent_pl = pf_frag_pl = pf_cache_pl = pf_cent_pl = NULL;
pf_state_scrub_pl = NULL;
pfr_ktable_pl = pfr_kentry_pl = NULL;
}
void
cleanup_pf_zone(void)
{
UMA_DESTROY(pf_tree_pl);
UMA_DESTROY(pf_rule_pl);
UMA_DESTROY(pf_addr_pl);
UMA_DESTROY(pf_state_pl);
UMA_DESTROY(pf_altq_pl);
UMA_DESTROY(pf_pooladdr_pl);
UMA_DESTROY(pf_frent_pl);
UMA_DESTROY(pf_frag_pl);
UMA_DESTROY(pf_cache_pl);
UMA_DESTROY(pf_cent_pl);
UMA_DESTROY(pfr_ktable_pl);
UMA_DESTROY(pfr_kentry_pl);
UMA_DESTROY(pf_state_scrub_pl);
}
#endif /* __FreeBSD__ */
#if defined(__FreeBSD__)
int
pfattach(void)
{
u_int32_t *my_timeout = pf_default_rule.timeout;
int error = 1;
do {
UMA_CREATE(pf_tree_pl, struct pf_tree_node, "pftrpl");
UMA_CREATE(pf_rule_pl, struct pf_rule, "pfrulepl");
UMA_CREATE(pf_addr_pl, struct pf_addr_dyn, "pfaddrpl");
UMA_CREATE(pf_state_pl, struct pf_state, "pfstatepl");
UMA_CREATE(pf_altq_pl, struct pf_altq, "pfaltqpl");
UMA_CREATE(pf_pooladdr_pl, struct pf_pooladdr, "pfpooladdrpl");
UMA_CREATE(pfr_ktable_pl, struct pfr_ktable, "pfrktable");
UMA_CREATE(pfr_kentry_pl, struct pfr_kentry, "pfrkentry");
UMA_CREATE(pf_frent_pl, struct pf_frent, "pffrent");
UMA_CREATE(pf_frag_pl, struct pf_fragment, "pffrag");
UMA_CREATE(pf_cache_pl, struct pf_fragment, "pffrcache");
UMA_CREATE(pf_cent_pl, struct pf_frcache, "pffrcent");
UMA_CREATE(pf_state_scrub_pl, struct pf_state_scrub,
"pfstatescrub");
error = 0;
} while(0);
if (error) {
cleanup_pf_zone();
return (error);
}
pfr_initialize();
if ( (error = pf_osfp_initialize()) ) {
cleanup_pf_zone();
pf_osfp_cleanup();
return (error);
}
pf_pool_limits[PF_LIMIT_STATES].pp = pf_state_pl;
pf_pool_limits[PF_LIMIT_STATES].limit = PFSTATE_HIWAT;
pf_pool_limits[PF_LIMIT_FRAGS].pp = pf_frent_pl;
pf_pool_limits[PF_LIMIT_FRAGS].limit = PFFRAG_FRENT_HIWAT;
uma_zone_set_max(pf_pool_limits[PF_LIMIT_STATES].pp,
pf_pool_limits[PF_LIMIT_STATES].limit);
RB_INIT(&tree_lan_ext);
RB_INIT(&tree_ext_gwy);
TAILQ_INIT(&pf_anchors);
pf_init_ruleset(&pf_main_ruleset);
TAILQ_INIT(&pf_altqs[0]);
TAILQ_INIT(&pf_altqs[1]);
TAILQ_INIT(&pf_pabuf);
pf_altqs_active = &pf_altqs[0];
pf_altqs_inactive = &pf_altqs[1];
/* default rule should never be garbage collected */
pf_default_rule.entries.tqe_prev = &pf_default_rule.entries.tqe_next;
pf_default_rule.action = PF_PASS;
pf_default_rule.nr = -1;
/* initialize default timeouts */
my_timeout[PFTM_TCP_FIRST_PACKET] = 120; /* First TCP packet */
my_timeout[PFTM_TCP_OPENING] = 30; /* No response yet */
my_timeout[PFTM_TCP_ESTABLISHED] = 24*60*60; /* Established */
my_timeout[PFTM_TCP_CLOSING] = 15 * 60; /* Half closed */
my_timeout[PFTM_TCP_FIN_WAIT] = 45; /* Got both FINs */
my_timeout[PFTM_TCP_CLOSED] = 90; /* Got a RST */
my_timeout[PFTM_UDP_FIRST_PACKET] = 60; /* First UDP packet */
my_timeout[PFTM_UDP_SINGLE] = 30; /* Unidirectional */
my_timeout[PFTM_UDP_MULTIPLE] = 60; /* Bidirectional */
my_timeout[PFTM_ICMP_FIRST_PACKET] = 20; /* First ICMP packet */
my_timeout[PFTM_ICMP_ERROR_REPLY] = 10; /* Got error response */
my_timeout[PFTM_OTHER_FIRST_PACKET] = 60; /* First packet */
my_timeout[PFTM_OTHER_SINGLE] = 30; /* Unidirectional */
my_timeout[PFTM_OTHER_MULTIPLE] = 60; /* Bidirectional */
my_timeout[PFTM_FRAG] = 30; /* Fragment expire */
my_timeout[PFTM_INTERVAL] = 10; /* Expire interval */
/*
* XXX
* The 2nd arg. 0 to callout_init(9) shoule be set to CALLOUT_MPSAFE
* if Gaint lock is removed from the network stack.
*/
callout_init(&pf_expire_to, 0);
callout_reset(&pf_expire_to, my_timeout[PFTM_INTERVAL] * hz,
pf_purge_timeout, &pf_expire_to);
pf_normalize_init();
pf_status.debug = PF_DEBUG_URGENT;
pf_pfil_hooked = 0;
return (error);
}
#else /* !__FreeBSD__ */
void
pfattach(int num)
{
u_int32_t *timeout = pf_default_rule.timeout;
pool_init(&pf_tree_pl, sizeof(struct pf_tree_node), 0, 0, 0, "pftrpl",
NULL);
pool_init(&pf_rule_pl, sizeof(struct pf_rule), 0, 0, 0, "pfrulepl",
&pool_allocator_nointr);
pool_init(&pf_addr_pl, sizeof(struct pf_addr_dyn), 0, 0, 0, "pfaddrpl",
&pool_allocator_nointr);
pool_init(&pf_state_pl, sizeof(struct pf_state), 0, 0, 0, "pfstatepl",
NULL);
pool_init(&pf_altq_pl, sizeof(struct pf_altq), 0, 0, 0, "pfaltqpl",
NULL);
pool_init(&pf_pooladdr_pl, sizeof(struct pf_pooladdr), 0, 0, 0,
"pfpooladdrpl", NULL);
pfr_initialize();
pf_osfp_initialize();
pool_sethardlimit(&pf_state_pl, pf_pool_limits[PF_LIMIT_STATES].limit,
NULL, 0);
RB_INIT(&tree_lan_ext);
RB_INIT(&tree_ext_gwy);
TAILQ_INIT(&pf_anchors);
pf_init_ruleset(&pf_main_ruleset);
TAILQ_INIT(&pf_altqs[0]);
TAILQ_INIT(&pf_altqs[1]);
TAILQ_INIT(&pf_pabuf);
pf_altqs_active = &pf_altqs[0];
pf_altqs_inactive = &pf_altqs[1];
/* default rule should never be garbage collected */
pf_default_rule.entries.tqe_prev = &pf_default_rule.entries.tqe_next;
pf_default_rule.action = PF_PASS;
pf_default_rule.nr = -1;
/* initialize default timeouts */
timeout[PFTM_TCP_FIRST_PACKET] = 120; /* First TCP packet */
timeout[PFTM_TCP_OPENING] = 30; /* No response yet */
timeout[PFTM_TCP_ESTABLISHED] = 24*60*60; /* Established */
timeout[PFTM_TCP_CLOSING] = 15 * 60; /* Half closed */
timeout[PFTM_TCP_FIN_WAIT] = 45; /* Got both FINs */
timeout[PFTM_TCP_CLOSED] = 90; /* Got a RST */
timeout[PFTM_UDP_FIRST_PACKET] = 60; /* First UDP packet */
timeout[PFTM_UDP_SINGLE] = 30; /* Unidirectional */
timeout[PFTM_UDP_MULTIPLE] = 60; /* Bidirectional */
timeout[PFTM_ICMP_FIRST_PACKET] = 20; /* First ICMP packet */
timeout[PFTM_ICMP_ERROR_REPLY] = 10; /* Got error response */
timeout[PFTM_OTHER_FIRST_PACKET] = 60; /* First packet */
timeout[PFTM_OTHER_SINGLE] = 30; /* Unidirectional */
timeout[PFTM_OTHER_MULTIPLE] = 60; /* Bidirectional */
timeout[PFTM_FRAG] = 30; /* Fragment expire */
timeout[PFTM_INTERVAL] = 10; /* Expire interval */
timeout_set(&pf_expire_to, pf_purge_timeout, &pf_expire_to);
timeout_add(&pf_expire_to, timeout[PFTM_INTERVAL] * hz);
pf_normalize_init();
pf_status.debug = PF_DEBUG_URGENT;
}
#endif /* __FreeBSD__ */
#if !defined(__FreeBSD__)
int
pfopen(dev_t dev, int flags, int fmt, struct proc *p)
{
if (minor(dev) >= 1)
return (ENXIO);
return (0);
}
#endif
#if !defined(__FreeBSD__)
int
pfclose(dev_t dev, int flags, int fmt, struct proc *p)
{
if (minor(dev) >= 1)
return (ENXIO);
return (0);
}
#endif
struct pf_pool *
pf_get_pool(char *anchorname, char *rulesetname, u_int32_t ticket,
u_int8_t rule_action, u_int8_t rule_number, u_int8_t r_last,
u_int8_t active, u_int8_t check_ticket)
{
struct pf_ruleset *ruleset;
struct pf_rule *rule;
int rs_num;
ruleset = pf_find_ruleset(anchorname, rulesetname);
if (ruleset == NULL)
return (NULL);
rs_num = pf_get_ruleset_number(rule_action);
if (rs_num >= PF_RULESET_MAX)
return (NULL);
if (active) {
if (check_ticket && ticket !=
ruleset->rules[rs_num].active.ticket)
return (NULL);
if (r_last)
rule = TAILQ_LAST(ruleset->rules[rs_num].active.ptr,
pf_rulequeue);
else
rule = TAILQ_FIRST(ruleset->rules[rs_num].active.ptr);
} else {
if (check_ticket && ticket !=
ruleset->rules[rs_num].inactive.ticket)
return (NULL);
if (r_last)
rule = TAILQ_LAST(ruleset->rules[rs_num].inactive.ptr,
pf_rulequeue);
else
rule = TAILQ_FIRST(ruleset->rules[rs_num].inactive.ptr);
}
if (!r_last) {
while ((rule != NULL) && (rule->nr != rule_number))
rule = TAILQ_NEXT(rule, entries);
}
if (rule == NULL)
return (NULL);
return (&rule->rpool);
}
int
pf_get_ruleset_number(u_int8_t action)
{
switch (action) {
case PF_SCRUB:
return (PF_RULESET_SCRUB);
break;
case PF_PASS:
case PF_DROP:
return (PF_RULESET_FILTER);
break;
case PF_NAT:
case PF_NONAT:
return (PF_RULESET_NAT);
break;
case PF_BINAT:
case PF_NOBINAT:
return (PF_RULESET_BINAT);
break;
case PF_RDR:
case PF_NORDR:
return (PF_RULESET_RDR);
break;
default:
return (PF_RULESET_MAX);
break;
}
}
void
pf_init_ruleset(struct pf_ruleset *ruleset)
{
int i;
memset(ruleset, 0, sizeof(struct pf_ruleset));
for (i = 0; i < PF_RULESET_MAX; i++) {
TAILQ_INIT(&ruleset->rules[i].queues[0]);
TAILQ_INIT(&ruleset->rules[i].queues[1]);
ruleset->rules[i].active.ptr = &ruleset->rules[i].queues[0];
ruleset->rules[i].inactive.ptr = &ruleset->rules[i].queues[1];
}
}
struct pf_anchor *
pf_find_anchor(const char *anchorname)
{
struct pf_anchor *anchor;
int n = -1;
anchor = TAILQ_FIRST(&pf_anchors);
while (anchor != NULL && (n = strcmp(anchor->name, anchorname)) < 0)
anchor = TAILQ_NEXT(anchor, entries);
if (n == 0)
return (anchor);
else
return (NULL);
}
struct pf_ruleset *
pf_find_ruleset(char *anchorname, char *rulesetname)
{
struct pf_anchor *anchor;
struct pf_ruleset *ruleset;
if (!anchorname[0] && !rulesetname[0])
return (&pf_main_ruleset);
if (!anchorname[0] || !rulesetname[0])
return (NULL);
anchorname[PF_ANCHOR_NAME_SIZE-1] = 0;
rulesetname[PF_RULESET_NAME_SIZE-1] = 0;
anchor = pf_find_anchor(anchorname);
if (anchor == NULL)
return (NULL);
ruleset = TAILQ_FIRST(&anchor->rulesets);
while (ruleset != NULL && strcmp(ruleset->name, rulesetname) < 0)
ruleset = TAILQ_NEXT(ruleset, entries);
if (ruleset != NULL && !strcmp(ruleset->name, rulesetname))
return (ruleset);
else
return (NULL);
}
struct pf_ruleset *
pf_find_or_create_ruleset(char *anchorname, char *rulesetname)
{
struct pf_anchor *anchor, *a;
struct pf_ruleset *ruleset, *r;
if (!anchorname[0] && !rulesetname[0])
return (&pf_main_ruleset);
if (!anchorname[0] || !rulesetname[0])
return (NULL);
anchorname[PF_ANCHOR_NAME_SIZE-1] = 0;
rulesetname[PF_RULESET_NAME_SIZE-1] = 0;
a = TAILQ_FIRST(&pf_anchors);
while (a != NULL && strcmp(a->name, anchorname) < 0)
a = TAILQ_NEXT(a, entries);
if (a != NULL && !strcmp(a->name, anchorname))
anchor = a;
else {
anchor = (struct pf_anchor *)malloc(sizeof(struct pf_anchor),
M_TEMP, M_NOWAIT);
if (anchor == NULL)
return (NULL);
memset(anchor, 0, sizeof(struct pf_anchor));
bcopy(anchorname, anchor->name, sizeof(anchor->name));
TAILQ_INIT(&anchor->rulesets);
if (a != NULL)
TAILQ_INSERT_BEFORE(a, anchor, entries);
else
TAILQ_INSERT_TAIL(&pf_anchors, anchor, entries);
}
r = TAILQ_FIRST(&anchor->rulesets);
while (r != NULL && strcmp(r->name, rulesetname) < 0)
r = TAILQ_NEXT(r, entries);
if (r != NULL && !strcmp(r->name, rulesetname))
return (r);
ruleset = (struct pf_ruleset *)malloc(sizeof(struct pf_ruleset),
M_TEMP, M_NOWAIT);
if (ruleset != NULL) {
pf_init_ruleset(ruleset);
bcopy(rulesetname, ruleset->name, sizeof(ruleset->name));
ruleset->anchor = anchor;
if (r != NULL)
TAILQ_INSERT_BEFORE(r, ruleset, entries);
else
TAILQ_INSERT_TAIL(&anchor->rulesets, ruleset, entries);
}
return (ruleset);
}
void
pf_remove_if_empty_ruleset(struct pf_ruleset *ruleset)
{
struct pf_anchor *anchor;
int i;
if (ruleset == NULL || ruleset->anchor == NULL || ruleset->tables > 0 ||
ruleset->topen)
return;
for (i = 0; i < PF_RULESET_MAX; ++i)
if (!TAILQ_EMPTY(ruleset->rules[i].active.ptr) ||
!TAILQ_EMPTY(ruleset->rules[i].inactive.ptr))
return;
anchor = ruleset->anchor;
TAILQ_REMOVE(&anchor->rulesets, ruleset, entries);
free(ruleset, M_TEMP);
if (TAILQ_EMPTY(&anchor->rulesets)) {
TAILQ_REMOVE(&pf_anchors, anchor, entries);
free(anchor, M_TEMP);
}
}
void
pf_mv_pool(struct pf_palist *poola, struct pf_palist *poolb)
{
struct pf_pooladdr *mv_pool_pa;
while ((mv_pool_pa = TAILQ_FIRST(poola)) != NULL) {
TAILQ_REMOVE(poola, mv_pool_pa, entries);
TAILQ_INSERT_TAIL(poolb, mv_pool_pa, entries);
}
}
void
pf_empty_pool(struct pf_palist *poola)
{
struct pf_pooladdr *empty_pool_pa;
while ((empty_pool_pa = TAILQ_FIRST(poola)) != NULL) {
pf_dynaddr_remove(&empty_pool_pa->addr);
pf_tbladdr_remove(&empty_pool_pa->addr);
TAILQ_REMOVE(poola, empty_pool_pa, entries);
pool_put(&pf_pooladdr_pl, empty_pool_pa);
}
}
void
pf_rm_rule(struct pf_rulequeue *rulequeue, struct pf_rule *rule)
{
if (rulequeue != NULL) {
if (rule->states <= 0) {
/*
* XXX - we need to remove the table *before* detaching
* the rule to make sure the table code does not delete
* the anchor under our feet.
*/
pf_tbladdr_remove(&rule->src.addr);
pf_tbladdr_remove(&rule->dst.addr);
}
TAILQ_REMOVE(rulequeue, rule, entries);
rule->entries.tqe_prev = NULL;
rule->nr = -1;
}
if (rule->states > 0 || rule->entries.tqe_prev != NULL)
return;
pf_tag_unref(rule->tag);
pf_tag_unref(rule->match_tag);
pf_dynaddr_remove(&rule->src.addr);
pf_dynaddr_remove(&rule->dst.addr);
if (rulequeue == NULL) {
pf_tbladdr_remove(&rule->src.addr);
pf_tbladdr_remove(&rule->dst.addr);
}
pf_empty_pool(&rule->rpool.list);
pool_put(&pf_rule_pl, rule);
}
u_int16_t
pf_tagname2tag(char *tagname)
{
struct pf_tagname *tag, *p = NULL;
u_int16_t new_tagid = 1;
TAILQ_FOREACH(tag, &pf_tags, entries)
if (strcmp(tagname, tag->name) == 0) {
tag->ref++;
return (tag->tag);
}
/*
* to avoid fragmentation, we do a linear search from the beginning
* and take the first free slot we find. if there is none or the list
* is empty, append a new entry at the end.
*/
/* new entry */
if (!TAILQ_EMPTY(&pf_tags))
for (p = TAILQ_FIRST(&pf_tags); p != NULL &&
p->tag == new_tagid; p = TAILQ_NEXT(p, entries))
new_tagid = p->tag + 1;
if (new_tagid > TAGID_MAX)
return (0);
/* allocate and fill new struct pf_tagname */
tag = (struct pf_tagname *)malloc(sizeof(struct pf_tagname),
M_TEMP, M_NOWAIT);
if (tag == NULL)
return (0);
bzero(tag, sizeof(struct pf_tagname));
strlcpy(tag->name, tagname, sizeof(tag->name));
tag->tag = new_tagid;
tag->ref++;
if (p != NULL) /* insert new entry before p */
TAILQ_INSERT_BEFORE(p, tag, entries);
else /* either list empty or no free slot in between */
TAILQ_INSERT_TAIL(&pf_tags, tag, entries);
return (tag->tag);
}
void
pf_tag2tagname(u_int16_t tagid, char *p)
{
struct pf_tagname *tag;
TAILQ_FOREACH(tag, &pf_tags, entries)
if (tag->tag == tagid) {
strlcpy(p, tag->name, PF_TAG_NAME_SIZE);
return;
}
}
void
pf_tag_unref(u_int16_t tag)
{
struct pf_tagname *p, *next;
if (tag == 0)
return;
for (p = TAILQ_FIRST(&pf_tags); p != NULL; p = next) {
next = TAILQ_NEXT(p, entries);
if (tag == p->tag) {
if (--p->ref == 0) {
TAILQ_REMOVE(&pf_tags, p, entries);
free(p, M_TEMP);
}
break;
}
}
}
#if defined(__FreeBSD__)
int
pfioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct thread *td)
#else
int
pfioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct proc *p)
#endif
{
struct pf_pooladdr *pa = NULL;
struct pf_pool *pool = NULL;
int s;
int error = 0;
/* XXX keep in sync with switch() below */
if (securelevel > 1)
switch (cmd) {
case DIOCGETRULES:
case DIOCGETRULE:
case DIOCGETADDRS:
case DIOCGETADDR:
case DIOCGETSTATE:
case DIOCSETSTATUSIF:
case DIOCGETSTATUS:
case DIOCCLRSTATUS:
case DIOCNATLOOK:
case DIOCSETDEBUG:
case DIOCGETSTATES:
case DIOCGETTIMEOUT:
case DIOCCLRRULECTRS:
case DIOCGETLIMIT:
case DIOCGETALTQS:
case DIOCGETALTQ:
case DIOCGETQSTATS:
case DIOCGETANCHORS:
case DIOCGETANCHOR:
case DIOCGETRULESETS:
case DIOCGETRULESET:
case DIOCRGETTABLES:
case DIOCRGETTSTATS:
case DIOCRCLRTSTATS:
case DIOCRCLRADDRS:
case DIOCRADDADDRS:
case DIOCRDELADDRS:
case DIOCRSETADDRS:
case DIOCRGETADDRS:
case DIOCRGETASTATS:
case DIOCRCLRASTATS:
case DIOCRTSTADDRS:
case DIOCOSFPGET:
#if defined(__FreeBSD__)
case DIOCGIFSPEED:
#endif
break;
default:
return (EPERM);
}
if (!(flags & FWRITE))
switch (cmd) {
case DIOCGETRULES:
case DIOCGETRULE:
case DIOCGETADDRS:
case DIOCGETADDR:
case DIOCGETSTATE:
case DIOCGETSTATUS:
case DIOCGETSTATES:
case DIOCGETTIMEOUT:
case DIOCGETLIMIT:
case DIOCGETALTQS:
case DIOCGETALTQ:
case DIOCGETQSTATS:
case DIOCGETANCHORS:
case DIOCGETANCHOR:
case DIOCGETRULESETS:
case DIOCGETRULESET:
case DIOCRGETTABLES:
case DIOCRGETTSTATS:
case DIOCRGETADDRS:
case DIOCRGETASTATS:
case DIOCRTSTADDRS:
case DIOCOSFPGET:
#if defined(__FreeBSD__)
case DIOCGIFSPEED:
#endif
break;
default:
return (EACCES);
}
#if defined(__FreeBSD__)
PF_LOCK();
#endif
switch (cmd) {
case DIOCSTART:
if (pf_status.running)
error = EEXIST;
else {
u_int32_t states = pf_status.states;
#if defined(__FreeBSD__)
PF_UNLOCK();
error = hook_pf();
PF_LOCK();
if (error) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: pfil registeration fail\n"));
break;
}
#endif
bzero(&pf_status, sizeof(struct pf_status));
pf_status.running = 1;
pf_status.states = states;
#if defined(__FreeBSD__)
pf_status.since = time_second;
#else
pf_status.since = time.tv_sec;
#endif
if (status_ifp != NULL)
#if defined(__FreeBSD__) && (__FreeBSD_version < 501113)
snprintf(pf_status.ifname, IFNAMSIZ, "%s%d",
status_ifp->if_name, status_ifp->if_unit);
#else
strlcpy(pf_status.ifname,
status_ifp->if_xname, IFNAMSIZ);
#endif
DPFPRINTF(PF_DEBUG_MISC, ("pf: started\n"));
}
break;
case DIOCSTOP:
if (!pf_status.running)
error = ENOENT;
else {
pf_status.running = 0;
#if defined(__FreeBSD__)
PF_UNLOCK();
error = dehook_pf();
PF_LOCK();
if (error) {
pf_status.running = 1;
DPFPRINTF(PF_DEBUG_MISC,
("pf: pfil unregisteration failed\n"));
}
#endif
DPFPRINTF(PF_DEBUG_MISC, ("pf: stopped\n"));
}
break;
case DIOCBEGINRULES: {
struct pfioc_rule *pr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rule *rule;
int rs_num;
ruleset = pf_find_or_create_ruleset(pr->anchor, pr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
while ((rule =
TAILQ_FIRST(ruleset->rules[rs_num].inactive.ptr)) != NULL)
pf_rm_rule(ruleset->rules[rs_num].inactive.ptr, rule);
pr->ticket = ++ruleset->rules[rs_num].inactive.ticket;
break;
}
case DIOCADDRULE: {
struct pfioc_rule *pr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rule *rule, *tail;
struct pf_pooladdr *pa;
int rs_num;
ruleset = pf_find_ruleset(pr->anchor, pr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
if (pr->rule.anchorname[0] && ruleset != &pf_main_ruleset) {
error = EINVAL;
break;
}
if (pr->rule.return_icmp >> 8 > ICMP_MAXTYPE) {
error = EINVAL;
break;
}
if (pr->ticket != ruleset->rules[rs_num].inactive.ticket) {
error = EBUSY;
break;
}
if (pr->pool_ticket != ticket_pabuf) {
error = EBUSY;
break;
}
rule = pool_get(&pf_rule_pl, PR_NOWAIT);
if (rule == NULL) {
error = ENOMEM;
break;
}
bcopy(&pr->rule, rule, sizeof(struct pf_rule));
rule->anchor = NULL;
rule->ifp = NULL;
TAILQ_INIT(&rule->rpool.list);
/* initialize refcounting */
rule->states = 0;
rule->entries.tqe_prev = NULL;
#ifndef INET
if (rule->af == AF_INET) {
pool_put(&pf_rule_pl, rule);
error = EAFNOSUPPORT;
break;
}
#endif /* INET */
#ifndef INET6
if (rule->af == AF_INET6) {
pool_put(&pf_rule_pl, rule);
error = EAFNOSUPPORT;
break;
}
#endif /* INET6 */
tail = TAILQ_LAST(ruleset->rules[rs_num].inactive.ptr,
pf_rulequeue);
if (tail)
rule->nr = tail->nr + 1;
else
rule->nr = 0;
if (rule->ifname[0]) {
rule->ifp = ifunit(rule->ifname);
if (rule->ifp == NULL) {
pool_put(&pf_rule_pl, rule);
error = EINVAL;
break;
}
}
if (rule->tagname[0])
if ((rule->tag = pf_tagname2tag(rule->tagname)) == 0)
error = EBUSY;
if (rule->match_tagname[0])
if ((rule->match_tag =
pf_tagname2tag(rule->match_tagname)) == 0)
error = EBUSY;
if (rule->rt && !rule->direction)
error = EINVAL;
if (pf_dynaddr_setup(&rule->src.addr, rule->af))
error = EINVAL;
if (pf_dynaddr_setup(&rule->dst.addr, rule->af))
error = EINVAL;
if (pf_tbladdr_setup(ruleset, &rule->src.addr))
error = EINVAL;
if (pf_tbladdr_setup(ruleset, &rule->dst.addr))
error = EINVAL;
TAILQ_FOREACH(pa, &pf_pabuf, entries)
if (pf_tbladdr_setup(ruleset, &pa->addr))
error = EINVAL;
pf_mv_pool(&pf_pabuf, &rule->rpool.list);
if (((((rule->action == PF_NAT) || (rule->action == PF_RDR) ||
(rule->action == PF_BINAT)) && !rule->anchorname[0]) ||
(rule->rt > PF_FASTROUTE)) &&
(TAILQ_FIRST(&rule->rpool.list) == NULL))
error = EINVAL;
if (error) {
pf_rm_rule(NULL, rule);
break;
}
rule->rpool.cur = TAILQ_FIRST(&rule->rpool.list);
rule->evaluations = rule->packets = rule->bytes = 0;
TAILQ_INSERT_TAIL(ruleset->rules[rs_num].inactive.ptr,
rule, entries);
break;
}
case DIOCCOMMITRULES: {
struct pfioc_rule *pr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rulequeue *old_rules;
struct pf_rule *rule;
int rs_num;
ruleset = pf_find_ruleset(pr->anchor, pr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
if (pr->ticket != ruleset->rules[rs_num].inactive.ticket) {
error = EBUSY;
break;
}
#ifdef ALTQ
/* set queue IDs */
if (rs_num == PF_RULESET_FILTER)
pf_rule_set_qid(ruleset->rules[rs_num].inactive.ptr);
#endif
/* Swap rules, keep the old. */
s = splsoftnet();
old_rules = ruleset->rules[rs_num].active.ptr;
ruleset->rules[rs_num].active.ptr =
ruleset->rules[rs_num].inactive.ptr;
ruleset->rules[rs_num].inactive.ptr = old_rules;
ruleset->rules[rs_num].active.ticket =
ruleset->rules[rs_num].inactive.ticket;
pf_calc_skip_steps(ruleset->rules[rs_num].active.ptr);
/* Purge the old rule list. */
while ((rule = TAILQ_FIRST(old_rules)) != NULL)
pf_rm_rule(old_rules, rule);
pf_remove_if_empty_ruleset(ruleset);
pf_update_anchor_rules();
splx(s);
break;
}
case DIOCGETRULES: {
struct pfioc_rule *pr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rule *tail;
int rs_num;
ruleset = pf_find_ruleset(pr->anchor, pr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
s = splsoftnet();
tail = TAILQ_LAST(ruleset->rules[rs_num].active.ptr,
pf_rulequeue);
if (tail)
pr->nr = tail->nr + 1;
else
pr->nr = 0;
pr->ticket = ruleset->rules[rs_num].active.ticket;
splx(s);
break;
}
case DIOCGETRULE: {
struct pfioc_rule *pr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rule *rule;
int rs_num, i;
ruleset = pf_find_ruleset(pr->anchor, pr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
if (pr->ticket != ruleset->rules[rs_num].active.ticket) {
error = EBUSY;
break;
}
s = splsoftnet();
rule = TAILQ_FIRST(ruleset->rules[rs_num].active.ptr);
while ((rule != NULL) && (rule->nr != pr->nr))
rule = TAILQ_NEXT(rule, entries);
if (rule == NULL) {
error = EBUSY;
splx(s);
break;
}
bcopy(rule, &pr->rule, sizeof(struct pf_rule));
pf_dynaddr_copyout(&pr->rule.src.addr);
pf_dynaddr_copyout(&pr->rule.dst.addr);
pf_tbladdr_copyout(&pr->rule.src.addr);
pf_tbladdr_copyout(&pr->rule.dst.addr);
for (i = 0; i < PF_SKIP_COUNT; ++i)
if (rule->skip[i].ptr == NULL)
pr->rule.skip[i].nr = -1;
else
pr->rule.skip[i].nr =
rule->skip[i].ptr->nr;
splx(s);
break;
}
case DIOCCHANGERULE: {
struct pfioc_rule *pcr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rule *oldrule = NULL, *newrule = NULL;
u_int32_t nr = 0;
int rs_num;
if (!(pcr->action == PF_CHANGE_REMOVE ||
pcr->action == PF_CHANGE_GET_TICKET) &&
pcr->pool_ticket != ticket_pabuf) {
error = EBUSY;
break;
}
if (pcr->action < PF_CHANGE_ADD_HEAD ||
pcr->action > PF_CHANGE_GET_TICKET) {
error = EINVAL;
break;
}
ruleset = pf_find_ruleset(pcr->anchor, pcr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pcr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
if (pcr->action == PF_CHANGE_GET_TICKET) {
pcr->ticket = ++ruleset->rules[rs_num].active.ticket;
break;
} else {
if (pcr->ticket !=
ruleset->rules[rs_num].active.ticket) {
error = EINVAL;
break;
}
if (pcr->rule.return_icmp >> 8 > ICMP_MAXTYPE) {
error = EINVAL;
break;
}
}
if (pcr->action != PF_CHANGE_REMOVE) {
newrule = pool_get(&pf_rule_pl, PR_NOWAIT);
if (newrule == NULL) {
error = ENOMEM;
break;
}
bcopy(&pcr->rule, newrule, sizeof(struct pf_rule));
TAILQ_INIT(&newrule->rpool.list);
/* initialize refcounting */
newrule->states = 0;
newrule->entries.tqe_prev = NULL;
#ifndef INET
if (newrule->af == AF_INET) {
pool_put(&pf_rule_pl, newrule);
error = EAFNOSUPPORT;
break;
}
#endif /* INET */
#ifndef INET6
if (newrule->af == AF_INET6) {
pool_put(&pf_rule_pl, newrule);
error = EAFNOSUPPORT;
break;
}
#endif /* INET6 */
if (newrule->ifname[0]) {
newrule->ifp = ifunit(newrule->ifname);
if (newrule->ifp == NULL) {
pool_put(&pf_rule_pl, newrule);
error = EINVAL;
break;
}
} else
newrule->ifp = NULL;
#ifdef ALTQ
/* set queue IDs */
if (newrule->qname[0] != 0) {
newrule->qid = pf_qname_to_qid(newrule->qname);
if (newrule->pqname[0] != 0)
newrule->pqid =
pf_qname_to_qid(newrule->pqname);
else
newrule->pqid = newrule->qid;
}
#endif
if (newrule->tagname[0])
if ((newrule->tag =
pf_tagname2tag(newrule->tagname)) == 0)
error = EBUSY;
if (newrule->match_tagname[0])
if ((newrule->match_tag = pf_tagname2tag(
newrule->match_tagname)) == 0)
error = EBUSY;
if (newrule->rt && !newrule->direction)
error = EINVAL;
if (pf_dynaddr_setup(&newrule->src.addr, newrule->af))
error = EINVAL;
if (pf_dynaddr_setup(&newrule->dst.addr, newrule->af))
error = EINVAL;
if (pf_tbladdr_setup(ruleset, &newrule->src.addr))
error = EINVAL;
if (pf_tbladdr_setup(ruleset, &newrule->dst.addr))
error = EINVAL;
pf_mv_pool(&pf_pabuf, &newrule->rpool.list);
if (((((newrule->action == PF_NAT) ||
(newrule->action == PF_RDR) ||
(newrule->action == PF_BINAT) ||
(newrule->rt > PF_FASTROUTE)) &&
!newrule->anchorname[0])) &&
(TAILQ_FIRST(&newrule->rpool.list) == NULL))
error = EINVAL;
if (error) {
pf_rm_rule(NULL, newrule);
break;
}
newrule->rpool.cur = TAILQ_FIRST(&newrule->rpool.list);
newrule->evaluations = newrule->packets = 0;
newrule->bytes = 0;
}
pf_empty_pool(&pf_pabuf);
s = splsoftnet();
if (pcr->action == PF_CHANGE_ADD_HEAD)
oldrule = TAILQ_FIRST(
ruleset->rules[rs_num].active.ptr);
else if (pcr->action == PF_CHANGE_ADD_TAIL)
oldrule = TAILQ_LAST(
ruleset->rules[rs_num].active.ptr, pf_rulequeue);
else {
oldrule = TAILQ_FIRST(
ruleset->rules[rs_num].active.ptr);
while ((oldrule != NULL) && (oldrule->nr != pcr->nr))
oldrule = TAILQ_NEXT(oldrule, entries);
if (oldrule == NULL) {
pf_rm_rule(NULL, newrule);
error = EINVAL;
splx(s);
break;
}
}
if (pcr->action == PF_CHANGE_REMOVE)
pf_rm_rule(ruleset->rules[rs_num].active.ptr, oldrule);
else {
if (oldrule == NULL)
TAILQ_INSERT_TAIL(
ruleset->rules[rs_num].active.ptr,
newrule, entries);
else if (pcr->action == PF_CHANGE_ADD_HEAD ||
pcr->action == PF_CHANGE_ADD_BEFORE)
TAILQ_INSERT_BEFORE(oldrule, newrule, entries);
else
TAILQ_INSERT_AFTER(
ruleset->rules[rs_num].active.ptr,
oldrule, newrule, entries);
}
nr = 0;
TAILQ_FOREACH(oldrule,
ruleset->rules[rs_num].active.ptr, entries)
oldrule->nr = nr++;
pf_calc_skip_steps(ruleset->rules[rs_num].active.ptr);
pf_remove_if_empty_ruleset(ruleset);
pf_update_anchor_rules();
ruleset->rules[rs_num].active.ticket++;
splx(s);
break;
}
case DIOCCLRSTATES: {
struct pf_tree_node *n;
s = splsoftnet();
RB_FOREACH(n, pf_state_tree, &tree_ext_gwy)
n->state->timeout = PFTM_PURGE;
pf_purge_expired_states();
pf_status.states = 0;
splx(s);
break;
}
case DIOCKILLSTATES: {
struct pf_tree_node *n;
struct pf_state *st;
struct pfioc_state_kill *psk = (struct pfioc_state_kill *)addr;
int killed = 0;
s = splsoftnet();
RB_FOREACH(n, pf_state_tree, &tree_ext_gwy) {
st = n->state;
if ((!psk->psk_af || st->af == psk->psk_af) &&
(!psk->psk_proto || psk->psk_proto == st->proto) &&
PF_MATCHA(psk->psk_src.not,
&psk->psk_src.addr.v.a.addr,
&psk->psk_src.addr.v.a.mask, &st->lan.addr,
st->af) &&
PF_MATCHA(psk->psk_dst.not,
&psk->psk_dst.addr.v.a.addr,
&psk->psk_dst.addr.v.a.mask, &st->ext.addr,
st->af) &&
(psk->psk_src.port_op == 0 ||
pf_match_port(psk->psk_src.port_op,
psk->psk_src.port[0], psk->psk_src.port[1],
st->lan.port)) &&
(psk->psk_dst.port_op == 0 ||
pf_match_port(psk->psk_dst.port_op,
psk->psk_dst.port[0], psk->psk_dst.port[1],
st->ext.port))) {
st->timeout = PFTM_PURGE;
killed++;
}
}
pf_purge_expired_states();
splx(s);
psk->psk_af = killed;
break;
}
case DIOCADDSTATE: {
struct pfioc_state *ps = (struct pfioc_state *)addr;
struct pf_state *state;
if (ps->state.timeout >= PFTM_MAX &&
ps->state.timeout != PFTM_UNTIL_PACKET) {
error = EINVAL;
break;
}
state = pool_get(&pf_state_pl, PR_NOWAIT);
if (state == NULL) {
error = ENOMEM;
break;
}
s = splsoftnet();
bcopy(&ps->state, state, sizeof(struct pf_state));
state->rule.ptr = NULL;
state->nat_rule.ptr = NULL;
state->anchor.ptr = NULL;
state->rt_ifp = NULL;
#if defined(__FreeBSD__)
state->creation = time_second;
#else
state->creation = time.tv_sec;
#endif
state->packets[0] = state->packets[1] = 0;
state->bytes[0] = state->bytes[1] = 0;
if (pf_insert_state(state)) {
pool_put(&pf_state_pl, state);
error = ENOMEM;
}
splx(s);
break;
}
case DIOCGETSTATE: {
struct pfioc_state *ps = (struct pfioc_state *)addr;
struct pf_tree_node *n;
u_int32_t nr;
nr = 0;
s = splsoftnet();
RB_FOREACH(n, pf_state_tree, &tree_ext_gwy) {
if (nr >= ps->nr)
break;
nr++;
}
if (n == NULL) {
error = EBUSY;
splx(s);
break;
}
bcopy(n->state, &ps->state, sizeof(struct pf_state));
ps->state.rule.nr = n->state->rule.ptr->nr;
ps->state.nat_rule.nr = (n->state->nat_rule.ptr == NULL) ?
-1 : n->state->nat_rule.ptr->nr;
ps->state.anchor.nr = (n->state->anchor.ptr == NULL) ?
-1 : n->state->anchor.ptr->nr;
splx(s);
ps->state.expire = pf_state_expires(n->state);
#if defined(__FreeBSD__)
if (ps->state.expire > time_second)
ps->state.expire -= time_second;
#else
if (ps->state.expire > time.tv_sec)
ps->state.expire -= time.tv_sec;
#endif
else
ps->state.expire = 0;
break;
}
case DIOCGETSTATES: {
struct pfioc_states *ps = (struct pfioc_states *)addr;
struct pf_tree_node *n;
struct pf_state *p, pstore;
u_int32_t nr = 0;
int space = ps->ps_len;
if (space == 0) {
s = splsoftnet();
RB_FOREACH(n, pf_state_tree, &tree_ext_gwy)
nr++;
splx(s);
ps->ps_len = sizeof(struct pf_state) * nr;
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
return (0);
}
s = splsoftnet();
p = ps->ps_states;
RB_FOREACH(n, pf_state_tree, &tree_ext_gwy) {
#if defined(__FreeBSD__)
int secs = time_second;
#else
int secs = time.tv_sec;
#endif
if ((nr + 1) * sizeof(*p) > (unsigned)ps->ps_len)
break;
bcopy(n->state, &pstore, sizeof(pstore));
pstore.rule.nr = n->state->rule.ptr->nr;
pstore.nat_rule.nr = (n->state->nat_rule.ptr == NULL) ?
-1 : n->state->nat_rule.ptr->nr;
pstore.anchor.nr = (n->state->anchor.ptr == NULL) ?
-1 : n->state->anchor.ptr->nr;
pstore.creation = secs - pstore.creation;
pstore.expire = pf_state_expires(n->state);
if (pstore.expire > secs)
pstore.expire -= secs;
else
pstore.expire = 0;
#if defined(__FreeBSD__)
PF_COPYOUT(&pstore, p, sizeof(*p), error);
#else
error = copyout(&pstore, p, sizeof(*p));
#endif
if (error) {
splx(s);
goto fail;
}
p++;
nr++;
}
ps->ps_len = sizeof(struct pf_state) * nr;
splx(s);
break;
}
case DIOCGETSTATUS: {
struct pf_status *s = (struct pf_status *)addr;
bcopy(&pf_status, s, sizeof(struct pf_status));
break;
}
case DIOCSETSTATUSIF: {
struct pfioc_if *pi = (struct pfioc_if *)addr;
struct ifnet *ifp;
if (pi->ifname[0] == 0) {
status_ifp = NULL;
bzero(pf_status.ifname, IFNAMSIZ);
break;
}
if ((ifp = ifunit(pi->ifname)) == NULL) {
error = EINVAL;
break;
} else if (ifp == status_ifp)
break;
status_ifp = ifp;
/* fallthrough into DIOCCLRSTATUS */
}
case DIOCCLRSTATUS: {
u_int32_t running = pf_status.running;
u_int32_t states = pf_status.states;
u_int32_t since = pf_status.since;
u_int32_t debug = pf_status.debug;
bzero(&pf_status, sizeof(struct pf_status));
pf_status.running = running;
pf_status.states = states;
pf_status.since = since;
pf_status.debug = debug;
if (status_ifp != NULL)
#if defined(__FreeBSD__) && (__FreeBSD_version < 501113)
snprintf(pf_status.ifname, IFNAMSIZ, "%s%d",
status_ifp->if_name, status_ifp->if_unit);
#else
strlcpy(pf_status.ifname,
status_ifp->if_xname, IFNAMSIZ);
#endif
break;
}
case DIOCNATLOOK: {
struct pfioc_natlook *pnl = (struct pfioc_natlook *)addr;
struct pf_state *st;
struct pf_tree_node key;
int direction = pnl->direction;
key.af = pnl->af;
key.proto = pnl->proto;
/*
* userland gives us source and dest of connection, reverse
* the lookup so we ask for what happens with the return
* traffic, enabling us to find it in the state tree.
*/
PF_ACPY(&key.addr[1], &pnl->saddr, pnl->af);
key.port[1] = pnl->sport;
PF_ACPY(&key.addr[0], &pnl->daddr, pnl->af);
key.port[0] = pnl->dport;
if (!pnl->proto ||
PF_AZERO(&pnl->saddr, pnl->af) ||
PF_AZERO(&pnl->daddr, pnl->af) ||
!pnl->dport || !pnl->sport)
error = EINVAL;
else {
s = splsoftnet();
if (direction == PF_IN)
st = pf_find_state(&tree_ext_gwy, &key);
else
st = pf_find_state(&tree_lan_ext, &key);
if (st != NULL) {
if (direction == PF_IN) {
PF_ACPY(&pnl->rsaddr, &st->lan.addr,
st->af);
pnl->rsport = st->lan.port;
PF_ACPY(&pnl->rdaddr, &pnl->daddr,
pnl->af);
pnl->rdport = pnl->dport;
} else {
PF_ACPY(&pnl->rdaddr, &st->gwy.addr,
st->af);
pnl->rdport = st->gwy.port;
PF_ACPY(&pnl->rsaddr, &pnl->saddr,
pnl->af);
pnl->rsport = pnl->sport;
}
} else
error = ENOENT;
splx(s);
}
break;
}
case DIOCSETTIMEOUT: {
struct pfioc_tm *pt = (struct pfioc_tm *)addr;
int old;
if (pt->timeout < 0 || pt->timeout >= PFTM_MAX ||
pt->seconds < 0) {
error = EINVAL;
goto fail;
}
old = pf_default_rule.timeout[pt->timeout];
pf_default_rule.timeout[pt->timeout] = pt->seconds;
pt->seconds = old;
break;
}
case DIOCGETTIMEOUT: {
struct pfioc_tm *pt = (struct pfioc_tm *)addr;
if (pt->timeout < 0 || pt->timeout >= PFTM_MAX) {
error = EINVAL;
goto fail;
}
pt->seconds = pf_default_rule.timeout[pt->timeout];
break;
}
case DIOCGETLIMIT: {
struct pfioc_limit *pl = (struct pfioc_limit *)addr;
if (pl->index < 0 || pl->index >= PF_LIMIT_MAX) {
error = EINVAL;
goto fail;
}
pl->limit = pf_pool_limits[pl->index].limit;
break;
}
case DIOCSETLIMIT: {
struct pfioc_limit *pl = (struct pfioc_limit *)addr;
int old_limit;
if (pl->index < 0 || pl->index >= PF_LIMIT_MAX) {
error = EINVAL;
goto fail;
}
#if defined(__FreeBSD__)
uma_zone_set_max(pf_pool_limits[pl->index].pp, pl->limit);
#else
if (pool_sethardlimit(pf_pool_limits[pl->index].pp,
pl->limit, NULL, 0) != 0) {
error = EBUSY;
goto fail;
}
#endif
old_limit = pf_pool_limits[pl->index].limit;
pf_pool_limits[pl->index].limit = pl->limit;
pl->limit = old_limit;
break;
}
case DIOCSETDEBUG: {
u_int32_t *level = (u_int32_t *)addr;
pf_status.debug = *level;
break;
}
case DIOCCLRRULECTRS: {
struct pf_ruleset *ruleset = &pf_main_ruleset;
struct pf_rule *rule;
s = splsoftnet();
TAILQ_FOREACH(rule,
ruleset->rules[PF_RULESET_FILTER].active.ptr, entries)
rule->evaluations = rule->packets =
rule->bytes = 0;
splx(s);
break;
}
#if defined(__FreeBSD__)
case DIOCGIFSPEED: {
struct pf_ifspeed *psp = (struct pf_ifspeed *)addr;
struct pf_ifspeed ps;
struct ifnet *ifp;
if (psp->ifname[0] != 0) {
/* Can we completely trust user-land? */
strlcpy(ps.ifname, psp->ifname, IFNAMSIZ);
ifp = ifunit(ps.ifname);
if (ifp )
psp->baudrate = ifp->if_baudrate;
else
error = EINVAL;
} else
error = EINVAL;
break;
}
#endif /* __FreeBSD__ */
#ifdef ALTQ
case DIOCSTARTALTQ: {
struct pf_altq *altq;
struct ifnet *ifp;
struct tb_profile tb;
/* enable all altq interfaces on active list */
s = splsoftnet();
TAILQ_FOREACH(altq, pf_altqs_active, entries) {
if (altq->qname[0] == 0) {
if ((ifp = ifunit(altq->ifname)) == NULL) {
error = EINVAL;
break;
}
if (ifp->if_snd.altq_type != ALTQT_NONE)
error = altq_enable(&ifp->if_snd);
if (error != 0)
break;
/* set tokenbucket regulator */
tb.rate = altq->ifbandwidth;
tb.depth = altq->tbrsize;
error = tbr_set(&ifp->if_snd, &tb);
if (error != 0)
break;
}
}
#if defined(__FreeBSD__)
if (error == 0) {
mtx_lock(&pf_altq_mtx);
pfaltq_running = 1;
mtx_unlock(&pf_altq_mtx);
}
#else
if (error == 0)
pfaltq_running = 1;
#endif
splx(s);
DPFPRINTF(PF_DEBUG_MISC, ("altq: started\n"));
break;
}
case DIOCSTOPALTQ: {
struct pf_altq *altq;
struct ifnet *ifp;
struct tb_profile tb;
int err;
/* disable all altq interfaces on active list */
s = splsoftnet();
TAILQ_FOREACH(altq, pf_altqs_active, entries) {
if (altq->qname[0] == 0) {
if ((ifp = ifunit(altq->ifname)) == NULL) {
error = EINVAL;
break;
}
if (ifp->if_snd.altq_type != ALTQT_NONE) {
err = altq_disable(&ifp->if_snd);
if (err != 0 && error == 0)
error = err;
}
/* clear tokenbucket regulator */
tb.rate = 0;
err = tbr_set(&ifp->if_snd, &tb);
if (err != 0 && error == 0)
error = err;
}
}
#if defined(__FreeBSD__)
if (error == 0) {
mtx_lock(&pf_altq_mtx);
pfaltq_running = 0;
mtx_unlock(&pf_altq_mtx);
}
#else
if (error == 0)
pfaltq_running = 0;
#endif
splx(s);
DPFPRINTF(PF_DEBUG_MISC, ("altq: stopped\n"));
break;
}
case DIOCBEGINALTQS: {
u_int32_t *ticket = (u_int32_t *)addr;
struct pf_altq *altq;
/* Purge the old altq list */
while ((altq = TAILQ_FIRST(pf_altqs_inactive)) != NULL) {
TAILQ_REMOVE(pf_altqs_inactive, altq, entries);
if (altq->qname[0] == 0) {
/* detach and destroy the discipline */
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
error = altq_remove(altq);
#if defined(__FreeBSD__)
PF_LOCK();
#endif
}
pool_put(&pf_altq_pl, altq);
}
*ticket = ++ticket_altqs_inactive;
break;
}
case DIOCADDALTQ: {
struct pfioc_altq *pa = (struct pfioc_altq *)addr;
struct pf_altq *altq, *a;
if (pa->ticket != ticket_altqs_inactive) {
error = EBUSY;
break;
}
altq = pool_get(&pf_altq_pl, PR_NOWAIT);
if (altq == NULL) {
error = ENOMEM;
break;
}
bcopy(&pa->altq, altq, sizeof(struct pf_altq));
/*
* if this is for a queue, find the discipline and
* copy the necessary fields
*/
if (altq->qname[0] != 0) {
TAILQ_FOREACH(a, pf_altqs_inactive, entries) {
if (strncmp(a->ifname, altq->ifname,
IFNAMSIZ) == 0 && a->qname[0] == 0) {
altq->altq_disc = a->altq_disc;
break;
}
}
}
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
error = altq_add(altq);
#if defined(__FreeBSD__)
PF_LOCK();
#endif
if (error) {
pool_put(&pf_altq_pl, altq);
break;
}
TAILQ_INSERT_TAIL(pf_altqs_inactive, altq, entries);
bcopy(altq, &pa->altq, sizeof(struct pf_altq));
break;
}
case DIOCCOMMITALTQS: {
u_int32_t *ticket = (u_int32_t *)addr;
struct pf_altqqueue *old_altqs;
struct pf_altq *altq;
struct pf_anchor *anchor;
struct pf_ruleset *ruleset;
int err;
if (*ticket != ticket_altqs_inactive) {
error = EBUSY;
break;
}
/* Swap altqs, keep the old. */
s = splsoftnet();
old_altqs = pf_altqs_active;
pf_altqs_active = pf_altqs_inactive;
pf_altqs_inactive = old_altqs;
ticket_altqs_active = ticket_altqs_inactive;
/* Attach new disciplines */
TAILQ_FOREACH(altq, pf_altqs_active, entries) {
if (altq->qname[0] == 0) {
/* attach the discipline */
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
error = altq_pfattach(altq);
#if defined(__FreeBSD__)
PF_LOCK();
#endif
if (error) {
splx(s);
goto fail;
}
}
}
/* Purge the old altq list */
while ((altq = TAILQ_FIRST(pf_altqs_inactive)) != NULL) {
TAILQ_REMOVE(pf_altqs_inactive, altq, entries);
if (altq->qname[0] == 0) {
/* detach and destroy the discipline */
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
err = altq_pfdetach(altq);
if (err != 0 && error == 0)
error = err;
err = altq_remove(altq);
if (err != 0 && error == 0)
error = err;
#if defined(__FreeBSD__)
PF_LOCK();
#endif
}
pool_put(&pf_altq_pl, altq);
}
splx(s);
/* update queue IDs */
pf_rule_set_qid(
pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr);
TAILQ_FOREACH(anchor, &pf_anchors, entries) {
TAILQ_FOREACH(ruleset, &anchor->rulesets, entries) {
pf_rule_set_qid(
ruleset->rules[PF_RULESET_FILTER].active.ptr
);
}
}
break;
}
case DIOCGETALTQS: {
struct pfioc_altq *pa = (struct pfioc_altq *)addr;
struct pf_altq *altq;
pa->nr = 0;
s = splsoftnet();
TAILQ_FOREACH(altq, pf_altqs_active, entries)
pa->nr++;
pa->ticket = ticket_altqs_active;
splx(s);
break;
}
case DIOCGETALTQ: {
struct pfioc_altq *pa = (struct pfioc_altq *)addr;
struct pf_altq *altq;
u_int32_t nr;
if (pa->ticket != ticket_altqs_active) {
error = EBUSY;
break;
}
nr = 0;
s = splsoftnet();
altq = TAILQ_FIRST(pf_altqs_active);
while ((altq != NULL) && (nr < pa->nr)) {
altq = TAILQ_NEXT(altq, entries);
nr++;
}
if (altq == NULL) {
error = EBUSY;
splx(s);
break;
}
bcopy(altq, &pa->altq, sizeof(struct pf_altq));
splx(s);
break;
}
case DIOCCHANGEALTQ:
/* CHANGEALTQ not supported yet! */
error = ENODEV;
break;
case DIOCGETQSTATS: {
struct pfioc_qstats *pq = (struct pfioc_qstats *)addr;
struct pf_altq *altq;
u_int32_t nr;
int nbytes;
if (pq->ticket != ticket_altqs_active) {
error = EBUSY;
break;
}
nbytes = pq->nbytes;
nr = 0;
s = splsoftnet();
altq = TAILQ_FIRST(pf_altqs_active);
while ((altq != NULL) && (nr < pq->nr)) {
altq = TAILQ_NEXT(altq, entries);
nr++;
}
if (altq == NULL) {
error = EBUSY;
splx(s);
break;
}
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
error = altq_getqstats(altq, pq->buf, &nbytes);
#if defined(__FreeBSD__)
PF_LOCK();
#endif
splx(s);
if (error == 0) {
pq->scheduler = altq->scheduler;
pq->nbytes = nbytes;
}
break;
}
#endif /* ALTQ */
case DIOCBEGINADDRS: {
struct pfioc_pooladdr *pp = (struct pfioc_pooladdr *)addr;
pf_empty_pool(&pf_pabuf);
pp->ticket = ++ticket_pabuf;
break;
}
case DIOCADDADDR: {
struct pfioc_pooladdr *pp = (struct pfioc_pooladdr *)addr;
#ifndef INET
if (pp->af == AF_INET) {
error = EAFNOSUPPORT;
break;
}
#endif /* INET */
#ifndef INET6
if (pp->af == AF_INET6) {
error = EAFNOSUPPORT;
break;
}
#endif /* INET6 */
if (pp->addr.addr.type != PF_ADDR_ADDRMASK &&
pp->addr.addr.type != PF_ADDR_DYNIFTL &&
pp->addr.addr.type != PF_ADDR_TABLE) {
error = EINVAL;
break;
}
pa = pool_get(&pf_pooladdr_pl, PR_NOWAIT);
if (pa == NULL) {
error = ENOMEM;
break;
}
bcopy(&pp->addr, pa, sizeof(struct pf_pooladdr));
if (pa->ifname[0]) {
pa->ifp = ifunit(pa->ifname);
if (pa->ifp == NULL) {
pool_put(&pf_pooladdr_pl, pa);
error = EINVAL;
break;
}
}
if (pf_dynaddr_setup(&pa->addr, pp->af)) {
pf_dynaddr_remove(&pa->addr);
pool_put(&pf_pooladdr_pl, pa);
error = EINVAL;
break;
}
TAILQ_INSERT_TAIL(&pf_pabuf, pa, entries);
break;
}
case DIOCGETADDRS: {
struct pfioc_pooladdr *pp = (struct pfioc_pooladdr *)addr;
pp->nr = 0;
s = splsoftnet();
pool = pf_get_pool(pp->anchor, pp->ruleset, pp->ticket,
pp->r_action, pp->r_num, 0, 1, 0);
if (pool == NULL) {
error = EBUSY;
splx(s);
break;
}
TAILQ_FOREACH(pa, &pool->list, entries)
pp->nr++;
splx(s);
break;
}
case DIOCGETADDR: {
struct pfioc_pooladdr *pp = (struct pfioc_pooladdr *)addr;
u_int32_t nr = 0;
s = splsoftnet();
pool = pf_get_pool(pp->anchor, pp->ruleset, pp->ticket,
pp->r_action, pp->r_num, 0, 1, 1);
if (pool == NULL) {
error = EBUSY;
splx(s);
break;
}
pa = TAILQ_FIRST(&pool->list);
while ((pa != NULL) && (nr < pp->nr)) {
pa = TAILQ_NEXT(pa, entries);
nr++;
}
if (pa == NULL) {
error = EBUSY;
splx(s);
break;
}
bcopy(pa, &pp->addr, sizeof(struct pf_pooladdr));
pf_dynaddr_copyout(&pp->addr.addr);
pf_tbladdr_copyout(&pp->addr.addr);
splx(s);
break;
}
case DIOCCHANGEADDR: {
struct pfioc_pooladdr *pca = (struct pfioc_pooladdr *)addr;
struct pf_pooladdr *oldpa = NULL, *newpa = NULL;
struct pf_ruleset *ruleset;
if (pca->action < PF_CHANGE_ADD_HEAD ||
pca->action > PF_CHANGE_REMOVE) {
error = EINVAL;
break;
}
if (pca->addr.addr.type != PF_ADDR_ADDRMASK &&
pca->addr.addr.type != PF_ADDR_DYNIFTL &&
pca->addr.addr.type != PF_ADDR_TABLE) {
error = EINVAL;
break;
}
ruleset = pf_find_ruleset(pca->anchor, pca->ruleset);
if (ruleset == NULL) {
error = EBUSY;
break;
}
pool = pf_get_pool(pca->anchor, pca->ruleset, pca->ticket,
pca->r_action, pca->r_num, pca->r_last, 1, 1);
if (pool == NULL) {
error = EBUSY;
break;
}
if (pca->action != PF_CHANGE_REMOVE) {
newpa = pool_get(&pf_pooladdr_pl, PR_NOWAIT);
if (newpa == NULL) {
error = ENOMEM;
break;
}
bcopy(&pca->addr, newpa, sizeof(struct pf_pooladdr));
#ifndef INET
if (pca->af == AF_INET) {
pool_put(&pf_pooladdr_pl, newpa);
error = EAFNOSUPPORT;
break;
}
#endif /* INET */
#ifndef INET6
if (pca->af == AF_INET6) {
pool_put(&pf_pooladdr_pl, newpa);
error = EAFNOSUPPORT;
break;
}
#endif /* INET6 */
if (newpa->ifname[0]) {
newpa->ifp = ifunit(newpa->ifname);
if (newpa->ifp == NULL) {
pool_put(&pf_pooladdr_pl, newpa);
error = EINVAL;
break;
}
} else
newpa->ifp = NULL;
if (pf_dynaddr_setup(&newpa->addr, pca->af) ||
pf_tbladdr_setup(ruleset, &newpa->addr)) {
pf_dynaddr_remove(&newpa->addr);
pool_put(&pf_pooladdr_pl, newpa);
error = EINVAL;
break;
}
}
s = splsoftnet();
if (pca->action == PF_CHANGE_ADD_HEAD)
oldpa = TAILQ_FIRST(&pool->list);
else if (pca->action == PF_CHANGE_ADD_TAIL)
oldpa = TAILQ_LAST(&pool->list, pf_palist);
else {
int i = 0;
oldpa = TAILQ_FIRST(&pool->list);
while ((oldpa != NULL) && (i < pca->nr)) {
oldpa = TAILQ_NEXT(oldpa, entries);
i++;
}
if (oldpa == NULL) {
error = EINVAL;
splx(s);
break;
}
}
if (pca->action == PF_CHANGE_REMOVE) {
TAILQ_REMOVE(&pool->list, oldpa, entries);
pf_dynaddr_remove(&oldpa->addr);
pf_tbladdr_remove(&oldpa->addr);
pool_put(&pf_pooladdr_pl, oldpa);
} else {
if (oldpa == NULL)
TAILQ_INSERT_TAIL(&pool->list, newpa, entries);
else if (pca->action == PF_CHANGE_ADD_HEAD ||
pca->action == PF_CHANGE_ADD_BEFORE)
TAILQ_INSERT_BEFORE(oldpa, newpa, entries);
else
TAILQ_INSERT_AFTER(&pool->list, oldpa,
newpa, entries);
}
pool->cur = TAILQ_FIRST(&pool->list);
PF_ACPY(&pool->counter, &pool->cur->addr.v.a.addr,
pca->af);
splx(s);
break;
}
case DIOCGETANCHORS: {
struct pfioc_anchor *pa = (struct pfioc_anchor *)addr;
struct pf_anchor *anchor;
pa->nr = 0;
TAILQ_FOREACH(anchor, &pf_anchors, entries)
pa->nr++;
break;
}
case DIOCGETANCHOR: {
struct pfioc_anchor *pa = (struct pfioc_anchor *)addr;
struct pf_anchor *anchor;
u_int32_t nr = 0;
anchor = TAILQ_FIRST(&pf_anchors);
while (anchor != NULL && nr < pa->nr) {
anchor = TAILQ_NEXT(anchor, entries);
nr++;
}
if (anchor == NULL)
error = EBUSY;
else
bcopy(anchor->name, pa->name, sizeof(pa->name));
break;
}
case DIOCGETRULESETS: {
struct pfioc_ruleset *pr = (struct pfioc_ruleset *)addr;
struct pf_anchor *anchor;
struct pf_ruleset *ruleset;
pr->anchor[PF_ANCHOR_NAME_SIZE-1] = 0;
if ((anchor = pf_find_anchor(pr->anchor)) == NULL) {
error = EINVAL;
break;
}
pr->nr = 0;
TAILQ_FOREACH(ruleset, &anchor->rulesets, entries)
pr->nr++;
break;
}
case DIOCGETRULESET: {
struct pfioc_ruleset *pr = (struct pfioc_ruleset *)addr;
struct pf_anchor *anchor;
struct pf_ruleset *ruleset;
u_int32_t nr = 0;
if ((anchor = pf_find_anchor(pr->anchor)) == NULL) {
error = EINVAL;
break;
}
ruleset = TAILQ_FIRST(&anchor->rulesets);
while (ruleset != NULL && nr < pr->nr) {
ruleset = TAILQ_NEXT(ruleset, entries);
nr++;
}
if (ruleset == NULL)
error = EBUSY;
else
bcopy(ruleset->name, pr->name, sizeof(pr->name));
break;
}
case DIOCRCLRTABLES: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != 0) {
error = ENODEV;
break;
}
error = pfr_clr_tables(&io->pfrio_table, &io->pfrio_ndel,
io->pfrio_flags);
break;
}
case DIOCRADDTABLES: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_table)) {
error = ENODEV;
break;
}
error = pfr_add_tables(io->pfrio_buffer, io->pfrio_size,
&io->pfrio_nadd, io->pfrio_flags);
break;
}
case DIOCRDELTABLES: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_table)) {
error = ENODEV;
break;
}
error = pfr_del_tables(io->pfrio_buffer, io->pfrio_size,
&io->pfrio_ndel, io->pfrio_flags);
break;
}
case DIOCRGETTABLES: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_table)) {
error = ENODEV;
break;
}
error = pfr_get_tables(&io->pfrio_table, io->pfrio_buffer,
&io->pfrio_size, io->pfrio_flags);
break;
}
case DIOCRGETTSTATS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_tstats)) {
error = ENODEV;
break;
}
error = pfr_get_tstats(&io->pfrio_table, io->pfrio_buffer,
&io->pfrio_size, io->pfrio_flags);
break;
}
case DIOCRCLRTSTATS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_table)) {
error = ENODEV;
break;
}
error = pfr_clr_tstats(io->pfrio_buffer, io->pfrio_size,
&io->pfrio_nzero, io->pfrio_flags);
break;
}
case DIOCRSETTFLAGS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_table)) {
error = ENODEV;
break;
}
error = pfr_set_tflags(io->pfrio_buffer, io->pfrio_size,
io->pfrio_setflag, io->pfrio_clrflag, &io->pfrio_nchange,
&io->pfrio_ndel, io->pfrio_flags);
break;
}
case DIOCRCLRADDRS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != 0) {
error = ENODEV;
break;
}
error = pfr_clr_addrs(&io->pfrio_table, &io->pfrio_ndel,
io->pfrio_flags);
break;
}
case DIOCRADDADDRS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_addr)) {
error = ENODEV;
break;
}
error = pfr_add_addrs(&io->pfrio_table, io->pfrio_buffer,
io->pfrio_size, &io->pfrio_nadd, io->pfrio_flags);
break;
}
case DIOCRDELADDRS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_addr)) {
error = ENODEV;
break;
}
error = pfr_del_addrs(&io->pfrio_table, io->pfrio_buffer,
io->pfrio_size, &io->pfrio_ndel, io->pfrio_flags);
break;
}
case DIOCRSETADDRS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_addr)) {
error = ENODEV;
break;
}
error = pfr_set_addrs(&io->pfrio_table, io->pfrio_buffer,
io->pfrio_size, &io->pfrio_size2, &io->pfrio_nadd,
&io->pfrio_ndel, &io->pfrio_nchange, io->pfrio_flags);
break;
}
case DIOCRGETADDRS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_addr)) {
error = ENODEV;
break;
}
error = pfr_get_addrs(&io->pfrio_table, io->pfrio_buffer,
&io->pfrio_size, io->pfrio_flags);
break;
}
case DIOCRGETASTATS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_astats)) {
error = ENODEV;
break;
}
error = pfr_get_astats(&io->pfrio_table, io->pfrio_buffer,
&io->pfrio_size, io->pfrio_flags);
break;
}
case DIOCRCLRASTATS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_addr)) {
error = ENODEV;
break;
}
error = pfr_clr_astats(&io->pfrio_table, io->pfrio_buffer,
io->pfrio_size, &io->pfrio_nzero, io->pfrio_flags);
break;
}
case DIOCRTSTADDRS: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_addr)) {
error = ENODEV;
break;
}
error = pfr_tst_addrs(&io->pfrio_table, io->pfrio_buffer,
io->pfrio_size, &io->pfrio_nmatch, io->pfrio_flags);
break;
}
case DIOCRINABEGIN: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != 0) {
error = ENODEV;
break;
}
error = pfr_ina_begin(&io->pfrio_table, &io->pfrio_ticket,
&io->pfrio_ndel, io->pfrio_flags);
break;
}
case DIOCRINACOMMIT: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != 0) {
error = ENODEV;
break;
}
error = pfr_ina_commit(&io->pfrio_table, io->pfrio_ticket,
&io->pfrio_nadd, &io->pfrio_nchange, io->pfrio_flags);
break;
}
case DIOCRINADEFINE: {
struct pfioc_table *io = (struct pfioc_table *)addr;
if (io->pfrio_esize != sizeof(struct pfr_addr)) {
error = ENODEV;
break;
}
error = pfr_ina_define(&io->pfrio_table, io->pfrio_buffer,
io->pfrio_size, &io->pfrio_nadd, &io->pfrio_naddr,
io->pfrio_ticket, io->pfrio_flags);
break;
}
case DIOCOSFPFLUSH:
s = splsoftnet();
pf_osfp_flush();
splx(s);
break;
case DIOCOSFPADD: {
struct pf_osfp_ioctl *io = (struct pf_osfp_ioctl *)addr;
s = splsoftnet();
error = pf_osfp_add(io);
splx(s);
break;
}
case DIOCOSFPGET: {
struct pf_osfp_ioctl *io = (struct pf_osfp_ioctl *)addr;
s = splsoftnet();
error = pf_osfp_get(io);
splx(s);
break;
}
default:
error = ENODEV;
break;
}
fail:
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
return (error);
}
#if defined(__FreeBSD__)
/*
* XXX - Check for version missmatch!!!
*/
static int
pf_beginrules(void *addr)
{
struct pfioc_rule *pr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rule *rule;
int rs_num;
int error = 0;
do {
ruleset = pf_find_or_create_ruleset(pr->anchor, pr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
while ((rule =
TAILQ_FIRST(ruleset->rules[rs_num].inactive.ptr)) != NULL)
pf_rm_rule(ruleset->rules[rs_num].inactive.ptr, rule);
pr->ticket = ++ruleset->rules[rs_num].inactive.ticket;
} while(0);
return (error);
}
static int
pf_commitrules(void *addr)
{
struct pfioc_rule *pr = (struct pfioc_rule *)addr;
struct pf_ruleset *ruleset;
struct pf_rulequeue *old_rules;
struct pf_rule *rule;
int rs_num, s;
int error = 0;
do {
ruleset = pf_find_ruleset(pr->anchor, pr->ruleset);
if (ruleset == NULL) {
error = EINVAL;
break;
}
rs_num = pf_get_ruleset_number(pr->rule.action);
if (rs_num >= PF_RULESET_MAX) {
error = EINVAL;
break;
}
if (pr->ticket != ruleset->rules[rs_num].inactive.ticket) {
error = EBUSY;
break;
}
#ifdef ALTQ
/* set queue IDs */
if (rs_num == PF_RULESET_FILTER)
pf_rule_set_qid(ruleset->rules[rs_num].inactive.ptr);
#endif
/* Swap rules, keep the old. */
s = splsoftnet();
old_rules = ruleset->rules[rs_num].active.ptr;
ruleset->rules[rs_num].active.ptr =
ruleset->rules[rs_num].inactive.ptr;
ruleset->rules[rs_num].inactive.ptr = old_rules;
ruleset->rules[rs_num].active.ticket =
ruleset->rules[rs_num].inactive.ticket;
pf_calc_skip_steps(ruleset->rules[rs_num].active.ptr);
/* Purge the old rule list. */
while ((rule = TAILQ_FIRST(old_rules)) != NULL)
pf_rm_rule(old_rules, rule);
pf_remove_if_empty_ruleset(ruleset);
pf_update_anchor_rules();
splx(s);
} while (0);
return (error);
}
#if defined(ALTQ)
static int
pf_beginaltqs(void *addr)
{
u_int32_t *ticket = (u_int32_t *)addr;
struct pf_altq *altq;
int error = 0;
/* Purge the old altq list */
while ((altq = TAILQ_FIRST(pf_altqs_inactive)) != NULL) {
TAILQ_REMOVE(pf_altqs_inactive, altq, entries);
if (altq->qname[0] == 0) {
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
/* detach and destroy the discipline */
error = altq_remove(altq);
#if defined(__FreeBSD__)
PF_LOCK();
#endif
}
uma_zfree(pf_altq_pl, altq);
}
*ticket = ++ticket_altqs_inactive;
return (error);
}
static int
pf_commitaltqs(void *addr)
{
u_int32_t *ticket = (u_int32_t *)addr;
struct pf_altqqueue *old_altqs;
struct pf_altq *altq;
struct pf_anchor *anchor;
struct pf_ruleset *ruleset;
int err;
int s;
int error = 0;
do {
if (*ticket != ticket_altqs_inactive) {
error = EBUSY;
break;
}
/* Swap altqs, keep the old. */
s = splsoftnet();
old_altqs = pf_altqs_active;
pf_altqs_active = pf_altqs_inactive;
pf_altqs_inactive = old_altqs;
ticket_altqs_active = ticket_altqs_inactive;
/* Attach new disciplines */
TAILQ_FOREACH(altq, pf_altqs_active, entries) {
if (altq->qname[0] == 0) {
/* attach the discipline */
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
error = altq_pfattach(altq);
#if defined(__FreeBSD__)
PF_LOCK();
#endif
if (error) {
splx(s);
goto altq_fail;
}
}
}
/* Purge the old altq list */
while ((altq = TAILQ_FIRST(pf_altqs_inactive)) != NULL) {
TAILQ_REMOVE(pf_altqs_inactive, altq, entries);
if (altq->qname[0] == 0) {
/* detach and destroy the discipline */
#if defined(__FreeBSD__)
PF_UNLOCK();
#endif
err = altq_pfdetach(altq);
if (err != 0 && error == 0)
error = err;
err = altq_remove(altq);
if (err != 0 && error == 0)
error = err;
#if defined(__FreeBSD__)
PF_LOCK();
#endif
}
uma_zfree(pf_altq_pl, altq);
}
splx(s);
/* update queue IDs */
pf_rule_set_qid(
pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr);
TAILQ_FOREACH(anchor, &pf_anchors, entries) {
TAILQ_FOREACH(ruleset, &anchor->rulesets, entries) {
pf_rule_set_qid(
ruleset->rules[PF_RULESET_FILTER].active.ptr
);
}
}
} while (0);
altq_fail:
return (error);
}
static int
pf_stopaltq(void)
{
struct pf_altq *altq;
struct ifnet *ifp;
struct tb_profile tb;
int err;
int s;
int error = 0;
do {
/* disable all altq interfaces on active list */
s = splsoftnet();
TAILQ_FOREACH(altq, pf_altqs_active, entries) {
if (altq->qname[0] == 0) {
if ((ifp = ifunit(altq->ifname)) == NULL) {
error = EINVAL;
break;
}
if (ifp->if_snd.altq_type != ALTQT_NONE) {
err = altq_disable(&ifp->if_snd);
if (err != 0 && error == 0)
error = err;
}
/* clear tokenbucket regulator */
tb.rate = 0;
err = tbr_set(&ifp->if_snd, &tb);
if (err != 0 && error == 0)
error = err;
}
}
#if defined(__FreeBSD__)
if (error == 0) {
mtx_lock(&pf_altq_mtx);
pfaltq_running = 0;
mtx_unlock(&pf_altq_mtx);
}
#else
if (error == 0)
pfaltq_running = 0;
#endif
splx(s);
} while (0);
return (error);
}
#endif
static void
pf_clearstates(void)
{
struct pf_tree_node *n;
int s;
s = splsoftnet();
RB_FOREACH(n, pf_state_tree, &tree_ext_gwy)
n->state->timeout = PFTM_PURGE;
pf_purge_expired_states();
pf_status.states = 0;
splx(s);
}
static int
pf_clear_tables(void *addr)
{
struct pfioc_table *io = (struct pfioc_table *)addr;
int error;
error = pfr_clr_tables(&io->pfrio_table, &io->pfrio_ndel,
io->pfrio_flags);
return (error);
}
static int
shutdown_pf(void)
{
struct pfioc_rule pr;
#if defined(ALTQ)
struct pfioc_altq pa;
#endif
struct pfioc_table io;
int error = 0;
callout_stop(&pf_expire_to);
PF_LOCK();
pf_status.running = 0;
do {
#if defined(ALTQ)
if ((error = pf_stopaltq())) {
DPFPRINTF(PF_DEBUG_MISC,
("ALTQ: stop(%i)\n", error));
break;
}
#endif
bzero(&pr, sizeof(pr));
pr.rule.action = PF_SCRUB;
if ((error = pf_beginrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_SCRUB: begin(%i)\n", error));
break;
}
if ((error = pf_commitrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_SCRUB: commit(%i)\n", error));
break;
}
pr.rule.action = PF_PASS;
if ((error = pf_beginrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_PASS: begin(%i)\n", error));
break;
}
if ((error = pf_commitrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_PASS: commit(%i)\n", error));
break;
}
/*
* XXX not sure, but can't hurt:
*/
bzero(&pr, sizeof(pr));
pr.rule.action = PF_NAT;
if ((error = pf_beginrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_NAT: begin(%i)\n", error));
break;
}
if ((error = pf_commitrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_NAT: commit(%i)\n", error));
break;
}
pr.rule.action = PF_BINAT;
if ((error = pf_beginrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_BINAT: begin(%i)\n", error));
break;
}
if ((error = pf_commitrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_BINAT: begin(%i)\n", error));
break;
}
pr.rule.action = PF_RDR;
if ((error = pf_beginrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_RDR: begin(%i)\n", error));
break;
}
if ((error = pf_commitrules(&pr))) {
DPFPRINTF(PF_DEBUG_MISC,
("PF_RDR: commit(%i)\n", error));
break;
}
#if defined(ALTQ)
bzero(&pa, sizeof(pa));
if ((error = pf_beginaltqs(&pa))) {
DPFPRINTF(PF_DEBUG_MISC,
("ALTQ: begin(%i)\n", error));
break;
}
if ((error = pf_commitaltqs(&pa))) {
DPFPRINTF(PF_DEBUG_MISC,
("ALTQ: commit(%i)\n", error));
break;
}
#endif
pf_clearstates();
bzero(&io, sizeof(io));
if ((error = pf_clear_tables(&io))) {
DPFPRINTF(PF_DEBUG_MISC,
("TABLES: clear(%i)\n", error));
break;
}
pf_osfp_flush();
} while(0);
PF_UNLOCK();
return (error);
}
static int
#if (__FreeBSD_version < 501108)
pf_check_in(void *ip, int hlen, struct ifnet *ifp, int dir, struct mbuf **m)
#else
pf_check_in(void *arg, struct mbuf **m, struct ifnet *ifp, int dir)
#endif
{
/*
* XXX Wed Jul 9 22:03:16 2003 UTC
* OpenBSD has changed its byte ordering convention on ip_len/ip_off
* in network stack. OpenBSD's network stack have converted
* ip_len/ip_off to host byte order frist as FreeBSD.
* Now this is not true anymore , so we should convert back to network
* byte order.
*/
struct ip *h = NULL;
int chk;
if ((*m)->m_pkthdr.len >= (int)sizeof(struct ip)) {
/* if m_pkthdr.len is less than ip header, pf will handle. */
h = mtod(*m, struct ip *);
HTONS(h->ip_len);
HTONS(h->ip_off);
}
chk = pf_test(PF_IN, ifp, m);
if (chk && *m) {
m_freem(*m);
*m = NULL;
}
if (*m != NULL) {
/* pf_test can change ip header location */
h = mtod(*m, struct ip *);
NTOHS(h->ip_len);
NTOHS(h->ip_off);
}
return chk;
}
static int
#if (__FreeBSD_version < 501108)
pf_check_out(void *ip, int hlen, struct ifnet *ifp, int dir, struct mbuf **m)
#else
pf_check_out(void *arg, struct mbuf **m, struct ifnet *ifp, int dir)
#endif
{
/*
* XXX Wed Jul 9 22:03:16 2003 UTC
* OpenBSD has changed its byte ordering convention on ip_len/ip_off
* in network stack. OpenBSD's network stack have converted
* ip_len/ip_off to host byte order frist as FreeBSD.
* Now this is not true anymore , so we should convert back to network
* byte order.
*/
struct ip *h = NULL;
int chk;
/* We need a proper CSUM befor we start (s. OpenBSD ip_output) */
if ((*m)->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
in_delayed_cksum(*m);
(*m)->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
if ((*m)->m_pkthdr.len >= (int)sizeof(*h)) {
/* if m_pkthdr.len is less than ip header, pf will handle. */
h = mtod(*m, struct ip *);
HTONS(h->ip_len);
HTONS(h->ip_off);
}
chk = pf_test(PF_OUT, ifp, m);
if (chk && *m) {
m_freem(*m);
*m = NULL;
}
if (*m != NULL) {
/* pf_test can change ip header location */
h = mtod(*m, struct ip *);
NTOHS(h->ip_len);
NTOHS(h->ip_off);
}
return chk;
}
#ifdef INET6
static int
#if (__FreeBSD_version < 501108)
pf_check6_in(void *ip, int hlen, struct ifnet *ifp, int dir, struct mbuf **m)
#else
pf_check6_in(void *arg, struct mbuf **m, struct ifnet *ifp, int dir)
#endif
{
/*
* IPv6 does not affected ip_len/ip_off byte order changes.
*/
int chk;
chk = pf_test6(PF_IN, ifp, m);
if (chk && *m) {
m_freem(*m);
*m = NULL;
}
return chk;
}
static int
#if (__FreeBSD_version < 501108)
pf_check6_out(void *ip, int hlen, struct ifnet *ifp, int dir, struct mbuf **m)
#else
pf_check6_out(void *arg, struct mbuf **m, struct ifnet *ifp, int dir)
#endif
{
/*
* IPv6 does not affected ip_len/ip_off byte order changes.
*/
int chk;
/* We need a proper CSUM befor we start (s. OpenBSD ip_output) */
if ((*m)->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
in_delayed_cksum(*m);
(*m)->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
chk = pf_test6(PF_OUT, ifp, m);
if (chk && *m) {
m_freem(*m);
*m = NULL;
}
return chk;
}
#endif /* INET6 */
static int
hook_pf(void)
{
#if (__FreeBSD_version >= 501108)
struct pfil_head *pfh_inet;
#if defined(INET6)
struct pfil_head *pfh_inet6;
#endif
#endif
PF_ASSERT(MA_NOTOWNED);
if (pf_pfil_hooked)
return (0);
#if (__FreeBSD_version < 501108)
/*
* XXX
* There is no easy way to get pfil header pointer with address
* family such as AF_INET, AF_INET6.
* Needs direct variable reference.
*/
pfil_add_hook(pf_check_in, PFIL_IN,
&inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
pfil_add_hook(pf_check_out, PFIL_OUT,
&inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
#if defined(INET6)
pfil_add_hook(pf_check6_in, PFIL_IN,
&inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh);
pfil_add_hook(pf_check6_out, PFIL_OUT,
&inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh);
#endif
#else /* __FreeBSD_version >= 501108 */
pfh_inet = pfil_head_get(PFIL_TYPE_AF, AF_INET);
if (pfh_inet == NULL)
return (ESRCH); /* XXX */
pfil_add_hook(pf_check_in, NULL, PFIL_IN | PFIL_WAITOK, pfh_inet);
pfil_add_hook(pf_check_out, NULL, PFIL_OUT | PFIL_WAITOK, pfh_inet);
#if defined(INET6)
pfh_inet6 = pfil_head_get(PFIL_TYPE_AF, AF_INET6);
if (pfh_inet6 == NULL) {
pfil_remove_hook(pf_check_in, NULL, PFIL_IN | PFIL_WAITOK,
pfh_inet);
pfil_remove_hook(pf_check_out, NULL, PFIL_OUT | PFIL_WAITOK,
pfh_inet);
return (ESRCH); /* XXX */
}
pfil_add_hook(pf_check6_in, NULL, PFIL_IN | PFIL_WAITOK, pfh_inet6);
pfil_add_hook(pf_check6_out, NULL, PFIL_OUT | PFIL_WAITOK, pfh_inet6);
#endif
#endif /* __FreeBSD_version >= 501108 */
pf_pfil_hooked = 1;
return (0);
}
static int
dehook_pf(void)
{
#if (__FreeBSD_version >= 501108)
struct pfil_head *pfh_inet;
#if defined(INET6)
struct pfil_head *pfh_inet6;
#endif
#endif
PF_ASSERT(MA_NOTOWNED);
if (pf_pfil_hooked == 0)
return (0);
#if (__FreeBSD_version < 501108)
pfil_remove_hook(pf_check_in, PFIL_IN,
&inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
pfil_remove_hook(pf_check_out, PFIL_OUT,
&inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
#if defined(INET6)
pfil_remove_hook(pf_check6_in, PFIL_IN,
&inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh);
pfil_remove_hook(pf_check6_out, PFIL_OUT,
&inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh);
#endif
#else /* __FreeBSD_version >= 501108 */
pfh_inet = pfil_head_get(PFIL_TYPE_AF, AF_INET);
if (pfh_inet == NULL)
return (ESRCH); /* XXX */
pfil_remove_hook(pf_check_in, NULL, PFIL_IN | PFIL_WAITOK,
pfh_inet);
pfil_remove_hook(pf_check_out, NULL, PFIL_OUT | PFIL_WAITOK,
pfh_inet);
#if defined(INET6)
pfh_inet6 = pfil_head_get(PFIL_TYPE_AF, AF_INET6);
if (pfh_inet6 == NULL)
return (ESRCH); /* XXX */
pfil_remove_hook(pf_check6_in, NULL, PFIL_IN | PFIL_WAITOK,
pfh_inet6);
pfil_remove_hook(pf_check6_out, NULL, PFIL_OUT | PFIL_WAITOK,
pfh_inet6);
#endif
#endif /* __FreeBSD_version >= 501108 */
pf_pfil_hooked = 0;
return (0);
}
static int
pf_load(void)
{
init_zone_var();
init_pf_mutex();
pf_dev = make_dev(&pf_cdevsw, 0, 0, 0, 0600, PF_NAME);
if (pfattach() < 0) {
destroy_dev(pf_dev);
destroy_pf_mutex();
return (ENOMEM);
}
#if defined(ALTQ)
mtx_lock(&pf_altq_mtx);
++pfaltq_ref;
mtx_unlock(&pf_altq_mtx);
#endif
printf("pf: $Name: $\n");
return (0);
}
static int
pf_unload(void)
{
int error = 0;
PF_LOCK();
pf_status.running = 0;
PF_UNLOCK();
error = dehook_pf();
if (error) {
/*
* Should not happen!
* XXX Due to error code ESRCH, kldunload will show
* a message like 'No such process'.
*/
printf("%s : pfil unregisteration fail\n", __FUNCTION__);
return error;
}
shutdown_pf();
cleanup_pf_zone();
pf_osfp_cleanup();
destroy_dev(pf_dev);
#if defined(ALTQ)
mtx_lock(&pf_altq_mtx);
--pfaltq_ref;
mtx_unlock(&pf_altq_mtx);
#endif
destroy_pf_mutex();
return error;
}
static int
pf_modevent(module_t mod, int type, void *data)
{
int error = 0;
switch(type) {
case MOD_LOAD:
error = pf_load();
break;
case MOD_UNLOAD:
error = pf_unload();
break;
default:
error = EINVAL;
break;
}
return error;
}
static moduledata_t pf_mod = {
"pf",
pf_modevent,
0
};
DECLARE_MODULE(pf, pf_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_DEPEND(pf, pflog, PFLOG_MINVER, PFLOG_PREFVER, PFLOG_MAXVER);
MODULE_DEPEND(pf, pfsync, PFSYNC_MINVER, PFSYNC_PREFVER, PFSYNC_MAXVER);
#if defined(ALTQ)
MODULE_DEPEND(pf, pfaltq, PFALTQ_MINVER, PFALTQ_PREFVER, PFALTQ_MAXVER);
#endif
MODULE_VERSION(pf, PF_MODVER);
#endif /* __FreeBSD__ */
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