freebsd-dev/sys/contrib/pf/net/pf_if.c

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/* $FreeBSD$ */
/* $OpenBSD: pf_if.c,v 1.11 2004/03/15 11:38:23 cedric Exp $ */
/*
* Copyright (c) 2001 Daniel Hartmeier
* Copyright (c) 2003 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.
*/
#if defined(__FreeBSD__)
#include "opt_inet.h"
#include "opt_inet6.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#ifdef __FreeBSD__
#include <sys/malloc.h>
#endif
#include <sys/mbuf.h>
#include <sys/filio.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/kernel.h>
#ifndef __FreeBSD__
#include <sys/device.h>
#endif
#include <sys/time.h>
#include <net/if.h>
#include <net/if_types.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 <net/pfvar.h>
#ifdef INET6
#include <netinet/ip6.h>
#endif /* INET6 */
#define ACCEPT_FLAGS(oklist) \
do { \
if ((flags & ~(oklist)) & \
PFI_FLAG_ALLMASK) \
return (EINVAL); \
} while (0)
#define senderr(e) do { rv = (e); goto _bad; } while (0)
struct pfi_kif **pfi_index2kif;
struct pfi_kif *pfi_self, *pfi_dummy;
int pfi_indexlim;
struct pfi_ifhead pfi_ifs;
struct pfi_statehead pfi_statehead;
int pfi_ifcnt;
#ifdef __FreeBSD__
uma_zone_t pfi_addr_pl;
#else
struct pool pfi_addr_pl;
#endif
long pfi_update = 1;
struct pfr_addr *pfi_buffer;
int pfi_buffer_cnt;
int pfi_buffer_max;
char pfi_reserved_anchor[PF_ANCHOR_NAME_SIZE] =
PF_RESERVED_ANCHOR;
char pfi_interface_ruleset[PF_RULESET_NAME_SIZE] =
PF_INTERFACE_RULESET;
#ifdef __FreeBSD__
eventhandler_tag pfi_clone_cookie = NULL;
eventhandler_tag pfi_attach_cookie = NULL;
eventhandler_tag pfi_detach_cookie = NULL;
#endif
void pfi_dynaddr_update(void *);
void pfi_kifaddr_update(void *);
void pfi_table_update(struct pfr_ktable *, struct pfi_kif *,
int, int);
void pfi_instance_add(struct ifnet *, int, int);
void pfi_address_add(struct sockaddr *, int, int);
int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
struct pfi_kif *pfi_if_create(const char *, struct pfi_kif *, int);
void pfi_copy_group(char *, const char *, int);
void pfi_dynamic_drivers(void);
void pfi_newgroup(const char *, int);
int pfi_skip_if(const char *, struct pfi_kif *, int);
int pfi_unmask(void *);
void pfi_dohooks(struct pfi_kif *);
#ifdef __FreeBSD__
void pfi_kifaddr_update_event(void *, struct ifnet *);
void pfi_attach_clone_event(void * __unused, struct if_clone *);
void pfi_attach_ifnet_event(void * __unused, struct ifnet *);
void pfi_detach_ifnet_event(void * __unused, struct ifnet *);
#endif
RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
#define PFI_DYNAMIC_BUSES { "pcmcia", "cardbus", "uhub" }
#define PFI_BUFFER_MAX 0x10000
#ifdef __FreeBSD__
MALLOC_DEFINE(PFI_MTYPE, "pf_if", "pf interface table");
#else
#define PFI_MTYPE M_IFADDR
#endif
void
pfi_initialize(void)
{
#ifdef __FreeBSD__
struct ifnet *ifp;
#endif
if (pfi_self != NULL) /* already initialized */
return;
TAILQ_INIT(&pfi_statehead);
#ifndef __FreeBSD__
pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0,
"pfiaddrpl", &pool_allocator_nointr);
#endif
pfi_buffer_max = 64;
pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer),
PFI_MTYPE, M_WAITOK);
pfi_self = pfi_if_create("self", NULL, PFI_IFLAG_GROUP);
pfi_dynamic_drivers();
#ifdef __FreeBSD__
PF_LOCK();
IFNET_RLOCK();
TAILQ_FOREACH(ifp, &ifnet, if_link)
if (ifp->if_dunit != IF_DUNIT_NONE) {
IFNET_RUNLOCK();
pfi_attach_ifnet(ifp);
IFNET_RLOCK();
}
IFNET_RUNLOCK();
PF_UNLOCK();
pfi_dummy = pfi_if_create("notyet", pfi_self,
PFI_IFLAG_GROUP | PFI_IFLAG_DYNAMIC);
pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event,
pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event,
pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
pfi_clone_cookie = EVENTHANDLER_REGISTER(if_clone_event,
pfi_attach_clone_event, NULL, EVENTHANDLER_PRI_ANY);
#endif
}
#ifdef __FreeBSD__
void
pfi_cleanup(void)
{
struct pfi_kif *p, key;
struct ifnet *ifp;
PF_ASSERT(MA_OWNED);
PF_UNLOCK();
EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie);
EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie);
EVENTHANDLER_DEREGISTER(if_clone_event, pfi_clone_cookie);
IFNET_RLOCK();
/* release PFI_IFLAG_INSTANCE */
TAILQ_FOREACH(ifp, &ifnet, if_link) {
strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name));
p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
if (p != NULL) {
PF_LOCK();
pfi_detach_ifnet(ifp);
PF_UNLOCK();
}
}
IFNET_RUNLOCK();
PF_LOCK();
/* XXX clear all other interface group */
while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) {
RB_REMOVE(pfi_ifhead, &pfi_ifs, p);
free(p->pfik_ah_head, PFI_MTYPE);
free(p, PFI_MTYPE);
}
free(pfi_index2kif, PFI_MTYPE);
free(pfi_buffer, PFI_MTYPE);
pfi_index2kif = NULL;
pfi_buffer = NULL;
pfi_self = NULL;
}
/*
* Wrapper functions for FreeBSD eventhandler
*/
void
pfi_kifaddr_update_event(void *arg, struct ifnet *ifp)
{
struct pfi_kif *p = arg;
PF_LOCK();
/*
* Check to see if it is 'our' interface as we do not have per
* interface hooks and thus get an update for every interface.
*/
if (p && p->pfik_ifp == ifp)
pfi_kifaddr_update(p);
PF_UNLOCK();
}
void
pfi_attach_clone_event(void *arg __unused, struct if_clone *ifc)
{
PF_LOCK();
pfi_attach_clone(ifc);
PF_UNLOCK();
}
void
pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp)
{
PF_LOCK();
if (ifp->if_dunit != IF_DUNIT_NONE)
pfi_attach_ifnet(ifp);
PF_UNLOCK();
}
void
pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp)
{
PF_LOCK();
pfi_detach_ifnet(ifp);
PF_UNLOCK();
}
#endif /* __FreeBSD__ */
void
pfi_attach_clone(struct if_clone *ifc)
{
pfi_initialize();
pfi_newgroup(ifc->ifc_name, PFI_IFLAG_CLONABLE);
}
void
pfi_attach_ifnet(struct ifnet *ifp)
{
struct pfi_kif *p, *q, key;
int s;
#ifdef __FreeBSD__
int realname;
#endif
pfi_initialize();
s = splsoftnet();
pfi_update++;
if (ifp->if_index >= pfi_indexlim) {
/*
* grow pfi_index2kif, similar to ifindex2ifnet code in if.c
*/
size_t m, n, oldlim;
struct pfi_kif **mp, **np;
oldlim = pfi_indexlim;
if (pfi_indexlim == 0)
pfi_indexlim = 64;
while (ifp->if_index >= pfi_indexlim)
pfi_indexlim <<= 1;
m = oldlim * sizeof(struct pfi_kif *);
mp = pfi_index2kif;
n = pfi_indexlim * sizeof(struct pfi_kif *);
#ifdef __FreeBSD__
np = malloc(n, PFI_MTYPE, M_NOWAIT);
#else
np = malloc(n, PFI_MTYPE, M_DONTWAIT);
#endif
if (np == NULL)
panic("pfi_attach_ifnet: "
"cannot allocate translation table");
bzero(np, n);
if (mp != NULL)
bcopy(mp, np, m);
pfi_index2kif = np;
if (mp != NULL)
free(mp, PFI_MTYPE);
}
strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name));
p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
#ifdef __FreeBSD__
/* some additional trickery for placeholders */
if ((p == NULL) || (p->pfik_parent == pfi_dummy)) {
/* are we looking at a renamed instance or not? */
pfi_copy_group(key.pfik_name, ifp->if_xname,
sizeof(key.pfik_name));
realname = (strncmp(key.pfik_name, ifp->if_dname,
sizeof(key.pfik_name)) == 0);
/* add group */
/* we can change if_xname, hence use if_dname as group id */
pfi_copy_group(key.pfik_name, ifp->if_dname,
sizeof(key.pfik_name));
q = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
if (q == NULL)
q = pfi_if_create(key.pfik_name, pfi_self,
PFI_IFLAG_GROUP|PFI_IFLAG_DYNAMIC);
else if (q->pfik_parent == pfi_dummy) {
q->pfik_parent = pfi_self;
q->pfik_flags = (PFI_IFLAG_GROUP | PFI_IFLAG_DYNAMIC);
}
if (q == NULL)
panic("pfi_attach_ifnet: "
"cannot allocate '%s' group", key.pfik_name);
/* add/modify interface */
if (p == NULL)
p = pfi_if_create(ifp->if_xname, q,
realname?PFI_IFLAG_INSTANCE:PFI_IFLAG_PLACEHOLDER);
else {
/* remove from the dummy group */
/* XXX: copy stats? We should not have any!!! */
pfi_dummy->pfik_delcnt++;
TAILQ_REMOVE(&pfi_dummy->pfik_grouphead, p,
pfik_instances);
/* move to the right group */
p->pfik_parent = q;
q->pfik_addcnt++;
TAILQ_INSERT_TAIL(&q->pfik_grouphead, p,
pfik_instances);
if (realname) {
p->pfik_flags &= ~PFI_IFLAG_PLACEHOLDER;
p->pfik_flags |= PFI_IFLAG_INSTANCE;
}
}
if (p == NULL)
panic("pfi_attach_ifnet: "
"cannot allocate '%s' interface", ifp->if_xname);
#else
if (p == NULL) {
/* add group */
pfi_copy_group(key.pfik_name, ifp->if_xname,
sizeof(key.pfik_name));
q = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
if (q == NULL)
q = pfi_if_create(key.pfik_name, pfi_self, PFI_IFLAG_GROUP);
else if (q->pfik_parent == pfi_dummy) {
q->pfik_parent = pfi_self;
q->pfik_flags = (PFI_IFLAG_GROUP | PFI_IFLAG_DYNAMIC);
}
if (q == NULL)
panic("pfi_attach_ifnet: "
"cannot allocate '%s' group", key.pfik_name);
/* add interface */
p = pfi_if_create(ifp->if_xname, q, PFI_IFLAG_INSTANCE);
if (p == NULL)
panic("pfi_attach_ifnet: "
"cannot allocate '%s' interface", ifp->if_xname);
#endif
} else
q = p->pfik_parent;
p->pfik_ifp = ifp;
p->pfik_flags |= PFI_IFLAG_ATTACHED;
#ifdef __FreeBSD__
PF_UNLOCK();
p->pfik_ah_cookie = EVENTHANDLER_REGISTER(ifaddr_event,
pfi_kifaddr_update_event, p, EVENTHANDLER_PRI_ANY);
PF_LOCK();
#else
p->pfik_ah_cookie =
hook_establish(ifp->if_addrhooks, 1, pfi_kifaddr_update, p);
#endif
pfi_index2kif[ifp->if_index] = p;
pfi_dohooks(p);
splx(s);
}
void
pfi_detach_ifnet(struct ifnet *ifp)
{
struct pfi_kif *p, *q, key;
int s;
strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name));
s = splsoftnet();
pfi_update++;
p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
if (p == NULL) {
printf("pfi_detach_ifnet: cannot find %s", ifp->if_xname);
splx(s);
return;
}
#ifdef __FreeBSD__
PF_UNLOCK();
EVENTHANDLER_DEREGISTER(ifaddr_event, p->pfik_ah_cookie);
PF_LOCK();
#else
hook_disestablish(p->pfik_ifp->if_addrhooks, p->pfik_ah_cookie);
#endif
q = p->pfik_parent;
p->pfik_ifp = NULL;
p->pfik_flags &= ~PFI_IFLAG_ATTACHED;
pfi_index2kif[ifp->if_index] = NULL;
pfi_dohooks(p);
pfi_maybe_destroy(p);
splx(s);
}
struct pfi_kif *
pfi_lookup_create(const char *name)
{
struct pfi_kif *p, *q, key;
int s;
s = splsoftnet();
p = pfi_lookup_if(name);
if (p == NULL) {
pfi_copy_group(key.pfik_name, name, sizeof(key.pfik_name));
q = pfi_lookup_if(key.pfik_name);
#ifdef __FreeBSD__
if ((q != NULL) && (q->pfik_parent != pfi_dummy))
p = pfi_if_create(name, q, PFI_IFLAG_INSTANCE);
else {
if (pfi_dummy == NULL)
panic("no 'notyet' dummy group");
p = pfi_if_create(name, pfi_dummy,
PFI_IFLAG_PLACEHOLDER);
}
#else
if (q != NULL)
p = pfi_if_create(name, q, PFI_IFLAG_INSTANCE);
#endif
}
splx(s);
return (p);
}
struct pfi_kif *
pfi_attach_rule(const char *name)
{
struct pfi_kif *p;
p = pfi_lookup_create(name);
if (p != NULL)
p->pfik_rules++;
return (p);
}
void
pfi_detach_rule(struct pfi_kif *p)
{
if (p == NULL)
return;
if (p->pfik_rules > 0)
p->pfik_rules--;
else
printf("pfi_detach_rule: reference count at 0\n");
pfi_maybe_destroy(p);
}
void
pfi_attach_state(struct pfi_kif *p)
{
if (!p->pfik_states++)
TAILQ_INSERT_TAIL(&pfi_statehead, p, pfik_w_states);
}
void
pfi_detach_state(struct pfi_kif *p)
{
if (p == NULL)
return;
if (p->pfik_states <= 0) {
printf("pfi_detach_state: reference count <= 0\n");
return;
}
if (!--p->pfik_states)
TAILQ_REMOVE(&pfi_statehead, p, pfik_w_states);
pfi_maybe_destroy(p);
}
int
pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
{
struct pfi_dynaddr *dyn;
char tblname[PF_TABLE_NAME_SIZE];
struct pf_ruleset *ruleset = NULL;
int s, rv = 0;
if (aw->type != PF_ADDR_DYNIFTL)
return (0);
dyn = pool_get(&pfi_addr_pl, PR_NOWAIT);
if (dyn == NULL)
return (1);
bzero(dyn, sizeof(*dyn));
s = splsoftnet();
dyn->pfid_kif = pfi_attach_rule(aw->v.ifname);
if (dyn->pfid_kif == NULL)
senderr(1);
dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
if (af == AF_INET && dyn->pfid_net == 32)
dyn->pfid_net = 128;
strlcpy(tblname, aw->v.ifname, sizeof(tblname));
if (aw->iflags & PFI_AFLAG_NETWORK)
strlcat(tblname, ":network", sizeof(tblname));
if (aw->iflags & PFI_AFLAG_BROADCAST)
strlcat(tblname, ":broadcast", sizeof(tblname));
if (aw->iflags & PFI_AFLAG_PEER)
strlcat(tblname, ":peer", sizeof(tblname));
if (aw->iflags & PFI_AFLAG_NOALIAS)
strlcat(tblname, ":0", sizeof(tblname));
if (dyn->pfid_net != 128)
snprintf(tblname + strlen(tblname),
sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
ruleset = pf_find_or_create_ruleset(pfi_reserved_anchor,
pfi_interface_ruleset);
if (ruleset == NULL)
senderr(1);
dyn->pfid_kt = pfr_attach_table(ruleset, tblname);
if (dyn->pfid_kt == NULL)
senderr(1);
dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
dyn->pfid_iflags = aw->iflags;
dyn->pfid_af = af;
dyn->pfid_hook_cookie = hook_establish(dyn->pfid_kif->pfik_ah_head, 1,
pfi_dynaddr_update, dyn);
if (dyn->pfid_hook_cookie == NULL)
senderr(1);
aw->p.dyn = dyn;
pfi_dynaddr_update(aw->p.dyn);
splx(s);
return (0);
_bad:
if (dyn->pfid_kt != NULL)
pfr_detach_table(dyn->pfid_kt);
if (ruleset != NULL)
pf_remove_if_empty_ruleset(ruleset);
if (dyn->pfid_kif != NULL)
pfi_detach_rule(dyn->pfid_kif);
pool_put(&pfi_addr_pl, dyn);
splx(s);
return (rv);
}
void
pfi_dynaddr_update(void *p)
{
struct pfi_dynaddr *dyn = (struct pfi_dynaddr *)p;
struct pfi_kif *kif = dyn->pfid_kif;
struct pfr_ktable *kt = dyn->pfid_kt;
if (dyn == NULL || kif == NULL || kt == NULL)
panic("pfi_dynaddr_update");
if (kt->pfrkt_larg != pfi_update) {
/* this table needs to be brought up-to-date */
pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
kt->pfrkt_larg = pfi_update;
}
pfr_dynaddr_update(kt, dyn);
}
void
pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
{
int e, size2 = 0;
struct pfi_kif *p;
struct pfr_table t;
if ((kif->pfik_flags & PFI_IFLAG_INSTANCE) && kif->pfik_ifp == NULL) {
pfr_clr_addrs(&kt->pfrkt_t, NULL, 0);
return;
}
pfi_buffer_cnt = 0;
if ((kif->pfik_flags & PFI_IFLAG_INSTANCE))
pfi_instance_add(kif->pfik_ifp, net, flags);
else if (strcmp(kif->pfik_name, "self")) {
TAILQ_FOREACH(p, &kif->pfik_grouphead, pfik_instances)
pfi_instance_add(p->pfik_ifp, net, flags);
} else {
RB_FOREACH(p, pfi_ifhead, &pfi_ifs)
if (p->pfik_flags & PFI_IFLAG_INSTANCE)
pfi_instance_add(p->pfik_ifp, net, flags);
}
t = kt->pfrkt_t;
t.pfrt_flags = 0;
if ((e = pfr_set_addrs(&t, pfi_buffer, pfi_buffer_cnt, &size2,
NULL, NULL, NULL, 0)))
printf("pfi_table_update: cannot set %d new addresses "
"into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
}
void
pfi_instance_add(struct ifnet *ifp, int net, int flags)
{
struct ifaddr *ia;
int got4 = 0, got6 = 0;
int net2, af;
if (ifp == NULL)
return;
TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) {
if (ia->ifa_addr == NULL)
continue;
af = ia->ifa_addr->sa_family;
if (af != AF_INET && af != AF_INET6)
continue;
if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6)
continue;
if ((flags & PFI_AFLAG_BROADCAST) &&
!(ifp->if_flags & IFF_BROADCAST))
continue;
if ((flags & PFI_AFLAG_PEER) &&
!(ifp->if_flags & IFF_POINTOPOINT))
continue;
if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
IN6_IS_ADDR_LINKLOCAL(
&((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr))
continue;
if (flags & PFI_AFLAG_NOALIAS) {
if (af == AF_INET && got4)
continue;
if (af == AF_INET6 && got6)
continue;
}
if (af == AF_INET)
got4 = 1;
else
got6 = 1;
net2 = net;
if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
if (af == AF_INET) {
net2 = pfi_unmask(&((struct sockaddr_in *)
ia->ifa_netmask)->sin_addr);
} else {
net2 = pfi_unmask(&((struct sockaddr_in6 *)
ia->ifa_netmask)->sin6_addr);
}
}
if (af == AF_INET && net2 > 32)
net2 = 32;
if (flags & PFI_AFLAG_BROADCAST)
pfi_address_add(ia->ifa_broadaddr, af, net2);
else if (flags & PFI_AFLAG_PEER)
pfi_address_add(ia->ifa_dstaddr, af, net2);
else
pfi_address_add(ia->ifa_addr, af, net2);
}
}
void
pfi_address_add(struct sockaddr *sa, int af, int net)
{
struct pfr_addr *p;
int i;
if (pfi_buffer_cnt >= pfi_buffer_max) {
int new_max = pfi_buffer_max * 2;
if (new_max > PFI_BUFFER_MAX) {
printf("pfi_address_add: address buffer full (%d/%d)\n",
pfi_buffer_cnt, PFI_BUFFER_MAX);
return;
}
#ifdef __FreeBSD__
p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE,
M_NOWAIT);
#else
p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE,
M_DONTWAIT);
#endif
if (p == NULL) {
printf("pfi_address_add: no memory to grow buffer "
"(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
return;
}
memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer));
/* no need to zero buffer */
free(pfi_buffer, PFI_MTYPE);
pfi_buffer = p;
pfi_buffer_max = new_max;
}
if (af == AF_INET && net > 32)
net = 128;
p = pfi_buffer + pfi_buffer_cnt++;
bzero(p, sizeof(*p));
p->pfra_af = af;
p->pfra_net = net;
if (af == AF_INET)
p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr;
if (af == AF_INET6) {
p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
if (IN6_IS_ADDR_LINKLOCAL(&p->pfra_ip6addr))
p->pfra_ip6addr.s6_addr16[1] = 0;
}
/* mask network address bits */
if (net < 128)
((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++)
((caddr_t)p)[i] = 0;
}
void
pfi_dynaddr_remove(struct pf_addr_wrap *aw)
{
int s;
if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
return;
s = splsoftnet();
hook_disestablish(aw->p.dyn->pfid_kif->pfik_ah_head,
aw->p.dyn->pfid_hook_cookie);
pfi_detach_rule(aw->p.dyn->pfid_kif);
aw->p.dyn->pfid_kif = NULL;
pfr_detach_table(aw->p.dyn->pfid_kt);
aw->p.dyn->pfid_kt = NULL;
pool_put(&pfi_addr_pl, aw->p.dyn);
aw->p.dyn = NULL;
splx(s);
}
void
pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
{
if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
aw->p.dyn->pfid_kif == NULL)
return;
aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
}
void
pfi_kifaddr_update(void *v)
{
int s;
s = splsoftnet();
pfi_update++;
pfi_dohooks(v);
splx(s);
}
int
pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
{
return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
}
struct pfi_kif *
pfi_if_create(const char *name, struct pfi_kif *q, int flags)
{
struct pfi_kif *p;
#ifdef __FreeBSD__
p = malloc(sizeof(*p), PFI_MTYPE, M_NOWAIT);
#else
p = malloc(sizeof(*p), PFI_MTYPE, M_DONTWAIT);
#endif
if (p == NULL)
return (NULL);
bzero(p, sizeof(*p));
#ifdef __FreeBSD__
p->pfik_ah_head = malloc(sizeof(*p->pfik_ah_head), PFI_MTYPE,
M_NOWAIT);
#else
p->pfik_ah_head = malloc(sizeof(*p->pfik_ah_head), PFI_MTYPE,
M_DONTWAIT);
#endif
if (p->pfik_ah_head == NULL) {
free(p, PFI_MTYPE);
return (NULL);
}
bzero(p->pfik_ah_head, sizeof(*p->pfik_ah_head));
TAILQ_INIT(p->pfik_ah_head);
TAILQ_INIT(&p->pfik_grouphead);
strlcpy(p->pfik_name, name, sizeof(p->pfik_name));
RB_INIT(&p->pfik_lan_ext);
RB_INIT(&p->pfik_ext_gwy);
p->pfik_flags = flags;
p->pfik_parent = q;
#ifdef __FreeBSD__
p->pfik_tzero = time_second;
#else
p->pfik_tzero = time.tv_sec;
#endif
RB_INSERT(pfi_ifhead, &pfi_ifs, p);
if (q != NULL) {
q->pfik_addcnt++;
TAILQ_INSERT_TAIL(&q->pfik_grouphead, p, pfik_instances);
}
pfi_ifcnt++;
return (p);
}
int
pfi_maybe_destroy(struct pfi_kif *p)
{
int i, j, k, s;
struct pfi_kif *q = p->pfik_parent;
if ((p->pfik_flags & (PFI_IFLAG_ATTACHED | PFI_IFLAG_GROUP)) ||
p->pfik_rules > 0 || p->pfik_states > 0)
#ifdef __FreeBSD__
if (!(p->pfik_flags & PFI_IFLAG_PLACEHOLDER))
#endif
return (0);
s = splsoftnet();
if (q != NULL) {
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
for (k = 0; k < 2; k++) {
q->pfik_bytes[i][j][k] +=
p->pfik_bytes[i][j][k];
q->pfik_packets[i][j][k] +=
p->pfik_packets[i][j][k];
#ifdef __FreeBSD__
/* clear stats in case we return to the dummy group */
p->pfik_bytes[i][j][k] = 0;
p->pfik_packets[i][j][k] = 0;
#endif
}
q->pfik_delcnt++;
TAILQ_REMOVE(&q->pfik_grouphead, p, pfik_instances);
}
#ifdef __FreeBSD__
if (p->pfik_rules > 0 || p->pfik_states > 0) {
/* move back to the dummy group */
p->pfik_parent = pfi_dummy;
pfi_dummy->pfik_addcnt++;
TAILQ_INSERT_TAIL(&pfi_dummy->pfik_grouphead, p,
pfik_instances);
return (0);
}
#endif
pfi_ifcnt--;
RB_REMOVE(pfi_ifhead, &pfi_ifs, p);
splx(s);
free(p->pfik_ah_head, PFI_MTYPE);
free(p, PFI_MTYPE);
return (1);
}
void
pfi_copy_group(char *p, const char *q, int m)
{
while (m > 1 && *q && !(*q >= '0' && *q <= '9')) {
*p++ = *q++;
m--;
}
if (m > 0)
*p++ = '\0';
}
void
pfi_dynamic_drivers(void)
{
#ifdef __FreeBSD__
struct ifnet *ifp;
/*
* For FreeBSD basically every interface is "dynamic" as we can unload
* modules e.g.
*/
IFNET_RLOCK();
TAILQ_FOREACH(ifp, &ifnet, if_link) {
if (ifp->if_dunit == IF_DUNIT_NONE)
continue;
pfi_newgroup(ifp->if_dname, PFI_IFLAG_DYNAMIC);
}
IFNET_RUNLOCK();
#else
char *buses[] = PFI_DYNAMIC_BUSES;
int nbuses = sizeof(buses)/sizeof(buses[0]);
int enabled[sizeof(buses)/sizeof(buses[0])];
struct device *dev;
struct cfdata *cf;
struct cfdriver *drv;
short *p;
int i;
bzero(enabled, sizeof(enabled));
TAILQ_FOREACH(dev, &alldevs, dv_list) {
if (!(dev->dv_flags & DVF_ACTIVE))
continue;
for (i = 0; i < nbuses; i++)
if (!enabled[i] && !strcmp(buses[i],
dev->dv_cfdata->cf_driver->cd_name))
enabled[i] = 1;
}
for (cf = cfdata; cf->cf_driver; cf++) {
if (cf->cf_driver->cd_class != DV_IFNET)
continue;
for (p = cf->cf_parents; p && *p >= 0; p++) {
if ((drv = cfdata[*p].cf_driver) == NULL)
continue;
for (i = 0; i < nbuses; i++)
if (enabled[i] &&
!strcmp(drv->cd_name, buses[i]))
break;
if (i < nbuses) {
pfi_newgroup(cf->cf_driver->cd_name,
PFI_IFLAG_DYNAMIC);
break;
}
}
}
#endif
}
void
pfi_newgroup(const char *name, int flags)
{
struct pfi_kif *p;
p = pfi_lookup_if(name);
if (p == NULL)
p = pfi_if_create(name, pfi_self, PFI_IFLAG_GROUP);
if (p == NULL) {
printf("pfi_newgroup: cannot allocate '%s' group", name);
return;
}
p->pfik_flags |= flags;
}
void
pfi_fill_oldstatus(struct pf_status *pfs)
{
struct pfi_kif *p, key;
int i, j, k, s;
strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name));
s = splsoftnet();
p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
if (p == NULL) {
splx(s);
return;
}
bzero(pfs->pcounters, sizeof(pfs->pcounters));
bzero(pfs->bcounters, sizeof(pfs->bcounters));
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
for (k = 0; k < 2; k++) {
pfs->pcounters[i][j][k] =
p->pfik_packets[i][j][k];
pfs->bcounters[i][j] +=
p->pfik_bytes[i][j][k];
}
splx(s);
}
int
pfi_clr_istats(const char *name, int *nzero, int flags)
{
struct pfi_kif *p;
int n = 0, s;
#ifdef __FreeBSD__
long tzero = time_second;
#else
long tzero = time.tv_sec;
#endif
s = splsoftnet();
ACCEPT_FLAGS(PFI_FLAG_GROUP|PFI_FLAG_INSTANCE);
RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
if (pfi_skip_if(name, p, flags))
continue;
bzero(p->pfik_packets, sizeof(p->pfik_packets));
bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
p->pfik_tzero = tzero;
n++;
}
splx(s);
if (nzero != NULL)
*nzero = n;
return (0);
}
int
pfi_get_ifaces(const char *name, struct pfi_if *buf, int *size, int flags)
{
struct pfi_kif *p;
int s, n = 0;
#ifdef __FreeBSD__
int ec;
#endif
ACCEPT_FLAGS(PFI_FLAG_GROUP|PFI_FLAG_INSTANCE);
s = splsoftnet();
RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
if (pfi_skip_if(name, p, flags))
continue;
if (*size > n++) {
if (!p->pfik_tzero)
p->pfik_tzero = boottime.tv_sec;
#ifdef __FreeBSD__
PF_COPYOUT(p, buf++, sizeof(*buf), ec);
if (ec) {
#else
if (copyout(p, buf++, sizeof(*buf))) {
#endif
splx(s);
return (EFAULT);
}
}
}
splx(s);
*size = n;
return (0);
}
struct pfi_kif *
pfi_lookup_if(const char *name)
{
struct pfi_kif *p, key;
strlcpy(key.pfik_name, name, sizeof(key.pfik_name));
p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
return (p);
}
int
pfi_skip_if(const char *filter, struct pfi_kif *p, int f)
{
int n;
if ((p->pfik_flags & PFI_IFLAG_GROUP) && !(f & PFI_FLAG_GROUP))
return (1);
if ((p->pfik_flags & PFI_IFLAG_INSTANCE) && !(f & PFI_FLAG_INSTANCE))
return (1);
if (filter == NULL || !*filter)
return (0);
if (!strcmp(p->pfik_name, filter))
return (0); /* exact match */
n = strlen(filter);
if (n < 1 || n >= IFNAMSIZ)
return (1); /* sanity check */
if (filter[n-1] >= '0' && filter[n-1] <= '9')
return (1); /* only do exact match in that case */
if (strncmp(p->pfik_name, filter, n))
return (1); /* prefix doesn't match */
return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
}
/* from pf_print_state.c */
int
pfi_unmask(void *addr)
{
struct pf_addr *m = addr;
int i = 31, j = 0, b = 0;
u_int32_t tmp;
while (j < 4 && m->addr32[j] == 0xffffffff) {
b += 32;
j++;
}
if (j < 4) {
tmp = ntohl(m->addr32[j]);
for (i = 31; tmp & (1 << i); --i)
b++;
}
return (b);
}
void
pfi_dohooks(struct pfi_kif *p)
{
for (; p != NULL; p = p->pfik_parent)
dohooks(p->pfik_ah_head, 0);
}
int
pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
{
if (af == AF_INET) {
switch (dyn->pfid_acnt4) {
case 0:
return (0);
case 1:
return (PF_MATCHA(0, &dyn->pfid_addr4,
&dyn->pfid_mask4, a, AF_INET));
default:
return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
}
} else {
switch (dyn->pfid_acnt6) {
case 0:
return (0);
case 1:
return (PF_MATCHA(0, &dyn->pfid_addr6,
&dyn->pfid_mask6, a, AF_INET6));
default:
return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
}
}
}