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f-stack/freebsd/netpfil/pf/pf_if.c

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/*-
* Copyright (c) 2001 Daniel Hartmeier
* Copyright (c) 2003 Cedric Berger
* Copyright (c) 2005 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2005 Ryan McBride <mcbride@openbsd.org>
* Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/eventhandler.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/rwlock.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/vnet.h>
#include <net/pfvar.h>
#include <net/route.h>
VNET_DEFINE(struct pfi_kif *, pfi_all);
static VNET_DEFINE(long, pfi_update);
#define V_pfi_update VNET(pfi_update)
#define PFI_BUFFER_MAX 0x10000
VNET_DECLARE(int, pf_vnet_active);
#define V_pf_vnet_active VNET(pf_vnet_active)
static VNET_DEFINE(struct pfr_addr *, pfi_buffer);
static VNET_DEFINE(int, pfi_buffer_cnt);
static VNET_DEFINE(int, pfi_buffer_max);
#define V_pfi_buffer VNET(pfi_buffer)
#define V_pfi_buffer_cnt VNET(pfi_buffer_cnt)
#define V_pfi_buffer_max VNET(pfi_buffer_max)
eventhandler_tag pfi_attach_cookie;
eventhandler_tag pfi_detach_cookie;
eventhandler_tag pfi_attach_group_cookie;
eventhandler_tag pfi_change_group_cookie;
eventhandler_tag pfi_detach_group_cookie;
eventhandler_tag pfi_ifaddr_event_cookie;
static void pfi_attach_ifnet(struct ifnet *);
static void pfi_attach_ifgroup(struct ifg_group *);
static void pfi_kif_update(struct pfi_kif *);
static void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int,
int);
static void pfi_instance_add(struct ifnet *, int, int);
static void pfi_address_add(struct sockaddr *, int, int);
static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
static int pfi_skip_if(const char *, struct pfi_kif *);
static int pfi_unmask(void *);
static void pfi_attach_ifnet_event(void * __unused, struct ifnet *);
static void pfi_detach_ifnet_event(void * __unused, struct ifnet *);
static void pfi_attach_group_event(void *, struct ifg_group *);
static void pfi_change_group_event(void *, char *);
static void pfi_detach_group_event(void *, struct ifg_group *);
static void pfi_ifaddr_event(void * __unused, struct ifnet *);
RB_HEAD(pfi_ifhead, pfi_kif);
static RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
static RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
static VNET_DEFINE(struct pfi_ifhead, pfi_ifs);
#define V_pfi_ifs VNET(pfi_ifs)
#define PFI_BUFFER_MAX 0x10000
MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database");
LIST_HEAD(pfi_list, pfi_kif);
static VNET_DEFINE(struct pfi_list, pfi_unlinked_kifs);
#define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs)
static struct mtx pfi_unlnkdkifs_mtx;
MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces",
MTX_DEF);
void
pfi_initialize_vnet(void)
{
struct ifg_group *ifg;
struct ifnet *ifp;
struct pfi_kif *kif;
V_pfi_buffer_max = 64;
V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer),
PFI_MTYPE, M_WAITOK);
kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
PF_RULES_WLOCK();
V_pfi_all = pfi_kif_attach(kif, IFG_ALL);
PF_RULES_WUNLOCK();
IFNET_RLOCK();
TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
pfi_attach_ifgroup(ifg);
TAILQ_FOREACH(ifp, &V_ifnet, if_link)
pfi_attach_ifnet(ifp);
IFNET_RUNLOCK();
}
void
pfi_initialize(void)
{
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_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event,
pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event,
pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY);
pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event,
pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event,
pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
}
void
pfi_cleanup_vnet(void)
{
struct pfi_kif *kif;
PF_RULES_WASSERT();
V_pfi_all = NULL;
while ((kif = RB_MIN(pfi_ifhead, &V_pfi_ifs))) {
RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif);
if (kif->pfik_group)
kif->pfik_group->ifg_pf_kif = NULL;
if (kif->pfik_ifp)
kif->pfik_ifp->if_pf_kif = NULL;
free(kif, PFI_MTYPE);
}
mtx_lock(&pfi_unlnkdkifs_mtx);
while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) {
LIST_REMOVE(kif, pfik_list);
free(kif, PFI_MTYPE);
}
mtx_unlock(&pfi_unlnkdkifs_mtx);
free(V_pfi_buffer, PFI_MTYPE);
}
void
pfi_cleanup(void)
{
EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie);
EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie);
EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie);
EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie);
EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie);
EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie);
}
struct pfi_kif *
pfi_kif_find(const char *kif_name)
{
struct pfi_kif_cmp s;
PF_RULES_ASSERT();
bzero(&s, sizeof(s));
strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name));
return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s));
}
struct pfi_kif *
pfi_kif_attach(struct pfi_kif *kif, const char *kif_name)
{
struct pfi_kif *kif1;
PF_RULES_WASSERT();
KASSERT(kif != NULL, ("%s: null kif", __func__));
kif1 = pfi_kif_find(kif_name);
if (kif1 != NULL) {
free(kif, PFI_MTYPE);
return (kif1);
}
bzero(kif, sizeof(*kif));
strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
/*
* It seems that the value of time_second is in unintialzied state
* when pf sets interface statistics clear time in boot phase if pf
* was statically linked to kernel. Instead of setting the bogus
* time value have pfi_get_ifaces handle this case. In
* pfi_get_ifaces it uses time_second if it sees the time is 0.
*/
kif->pfik_tzero = time_second > 1 ? time_second : 0;
TAILQ_INIT(&kif->pfik_dynaddrs);
RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif);
return (kif);
}
void
pfi_kif_ref(struct pfi_kif *kif)
{
PF_RULES_WASSERT();
kif->pfik_rulerefs++;
}
void
pfi_kif_unref(struct pfi_kif *kif)
{
PF_RULES_WASSERT();
KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif));
kif->pfik_rulerefs--;
if (kif->pfik_rulerefs > 0)
return;
/* kif referencing an existing ifnet or group should exist. */
if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all)
return;
RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif);
kif->pfik_flags |= PFI_IFLAG_REFS;
mtx_lock(&pfi_unlnkdkifs_mtx);
LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list);
mtx_unlock(&pfi_unlnkdkifs_mtx);
}
void
pfi_kif_purge(void)
{
struct pfi_kif *kif, *kif1;
/*
* Do naive mark-and-sweep garbage collecting of old kifs.
* Reference flag is raised by pf_purge_expired_states().
*/
mtx_lock(&pfi_unlnkdkifs_mtx);
LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) {
if (!(kif->pfik_flags & PFI_IFLAG_REFS)) {
LIST_REMOVE(kif, pfik_list);
free(kif, PFI_MTYPE);
} else
kif->pfik_flags &= ~PFI_IFLAG_REFS;
}
mtx_unlock(&pfi_unlnkdkifs_mtx);
}
int
pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
{
struct ifg_list *p;
if (rule_kif == NULL || rule_kif == packet_kif)
return (1);
if (rule_kif->pfik_group != NULL)
/* XXXGL: locking? */
TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next)
if (p->ifgl_group == rule_kif->pfik_group)
return (1);
return (0);
}
static void
pfi_attach_ifnet(struct ifnet *ifp)
{
struct pfi_kif *kif;
kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
PF_RULES_WLOCK();
V_pfi_update++;
kif = pfi_kif_attach(kif, ifp->if_xname);
kif->pfik_ifp = ifp;
ifp->if_pf_kif = kif;
pfi_kif_update(kif);
PF_RULES_WUNLOCK();
}
static void
pfi_attach_ifgroup(struct ifg_group *ifg)
{
struct pfi_kif *kif;
kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
PF_RULES_WLOCK();
V_pfi_update++;
kif = pfi_kif_attach(kif, ifg->ifg_group);
kif->pfik_group = ifg;
ifg->ifg_pf_kif = kif;
PF_RULES_WUNLOCK();
}
int
pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
{
switch (af) {
#ifdef INET
case 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));
}
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
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));
}
break;
#endif /* INET6 */
default:
return (0);
}
}
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;
struct pfi_kif *kif;
int rv = 0;
PF_RULES_WASSERT();
KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u",
__func__, aw->type));
KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn));
if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL)
return (ENOMEM);
if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) {
free(dyn, PFI_MTYPE);
return (ENOMEM);
}
if (!strcmp(aw->v.ifname, "self"))
dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL);
else
dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname);
pfi_kif_ref(dyn->pfid_kif);
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);
if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
rv = ENOMEM;
goto _bad;
}
if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
rv = ENOMEM;
goto _bad;
}
dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
dyn->pfid_iflags = aw->iflags;
dyn->pfid_af = af;
TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
aw->p.dyn = dyn;
pfi_kif_update(dyn->pfid_kif);
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_kif_unref(dyn->pfid_kif);
free(dyn, PFI_MTYPE);
return (rv);
}
static void
pfi_kif_update(struct pfi_kif *kif)
{
struct ifg_list *ifgl;
struct pfi_dynaddr *p;
PF_RULES_WASSERT();
/* update all dynaddr */
TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
pfi_dynaddr_update(p);
/* again for all groups kif is member of */
if (kif->pfik_ifp != NULL) {
IF_ADDR_RLOCK(kif->pfik_ifp);
TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next)
pfi_kif_update((struct pfi_kif *)
ifgl->ifgl_group->ifg_pf_kif);
IF_ADDR_RUNLOCK(kif->pfik_ifp);
}
}
static void
pfi_dynaddr_update(struct pfi_dynaddr *dyn)
{
struct pfi_kif *kif;
struct pfr_ktable *kt;
PF_RULES_WASSERT();
KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt,
("%s: bad argument", __func__));
kif = dyn->pfid_kif;
kt = dyn->pfid_kt;
if (kt->pfrkt_larg != V_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 = V_pfi_update;
}
pfr_dynaddr_update(kt, dyn);
}
static void
pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
{
int e, size2 = 0;
struct ifg_member *ifgm;
V_pfi_buffer_cnt = 0;
if (kif->pfik_ifp != NULL)
pfi_instance_add(kif->pfik_ifp, net, flags);
else if (kif->pfik_group != NULL) {
IFNET_RLOCK_NOSLEEP();
TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next)
pfi_instance_add(ifgm->ifgm_ifp, net, flags);
IFNET_RUNLOCK_NOSLEEP();
}
if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2,
NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
printf("%s: cannot set %d new addresses into table %s: %d\n",
__func__, V_pfi_buffer_cnt, kt->pfrkt_name, e);
}
static void
pfi_instance_add(struct ifnet *ifp, int net, int flags)
{
struct ifaddr *ia;
int got4 = 0, got6 = 0;
int net2, af;
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_list) {
if (ia->ifa_addr == NULL)
continue;
af = ia->ifa_addr->sa_family;
if (af != AF_INET && af != AF_INET6)
continue;
/*
* XXX: For point-to-point interfaces, (ifname:0) and IPv4,
* jump over addresses without a proper route to work
* around a problem with ppp not fully removing the
* address used during IPCP.
*/
if ((ifp->if_flags & IFF_POINTOPOINT) &&
!(ia->ifa_flags & IFA_ROUTE) &&
(flags & PFI_AFLAG_NOALIAS) && (af == AF_INET))
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 if (af == AF_INET6)
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 if (af == AF_INET6)
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);
}
IF_ADDR_RUNLOCK(ifp);
}
static void
pfi_address_add(struct sockaddr *sa, int af, int net)
{
struct pfr_addr *p;
int i;
if (V_pfi_buffer_cnt >= V_pfi_buffer_max) {
int new_max = V_pfi_buffer_max * 2;
if (new_max > PFI_BUFFER_MAX) {
printf("%s: address buffer full (%d/%d)\n", __func__,
V_pfi_buffer_cnt, PFI_BUFFER_MAX);
return;
}
p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE,
M_NOWAIT);
if (p == NULL) {
printf("%s: no memory to grow buffer (%d/%d)\n",
__func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX);
return;
}
memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer));
/* no need to zero buffer */
free(V_pfi_buffer, PFI_MTYPE);
V_pfi_buffer = p;
V_pfi_buffer_max = new_max;
}
if (af == AF_INET && net > 32)
net = 128;
p = V_pfi_buffer + V_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;
else if (af == AF_INET6) {
p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
if (IN6_IS_SCOPE_EMBED(&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 pfi_dynaddr *dyn)
{
KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__));
KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__));
TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
pfi_kif_unref(dyn->pfid_kif);
pfr_detach_table(dyn->pfid_kt);
free(dyn, PFI_MTYPE);
}
void
pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
{
KASSERT(aw->type == PF_ADDR_DYNIFTL,
("%s: type %u", __func__, aw->type));
if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL)
return;
aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
}
static int
pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
{
return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
}
void
pfi_update_status(const char *name, struct pf_status *pfs)
{
struct pfi_kif *p;
struct pfi_kif_cmp key;
struct ifg_member p_member, *ifgm;
TAILQ_HEAD(, ifg_member) ifg_members;
int i, j, k;
strlcpy(key.pfik_name, name, sizeof(key.pfik_name));
p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key);
if (p == NULL)
return;
if (p->pfik_group != NULL) {
bcopy(&p->pfik_group->ifg_members, &ifg_members,
sizeof(ifg_members));
} else {
/* build a temporary list for p only */
bzero(&p_member, sizeof(p_member));
p_member.ifgm_ifp = p->pfik_ifp;
TAILQ_INIT(&ifg_members);
TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next);
}
if (pfs) {
bzero(pfs->pcounters, sizeof(pfs->pcounters));
bzero(pfs->bcounters, sizeof(pfs->bcounters));
}
TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) {
if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL)
continue;
p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif;
/* just clear statistics */
if (pfs == NULL) {
bzero(p->pfik_packets, sizeof(p->pfik_packets));
bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
p->pfik_tzero = time_second;
continue;
}
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];
}
}
}
void
pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size)
{
struct pfi_kif *p, *nextp;
int n = 0;
for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) {
nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p);
if (pfi_skip_if(name, p))
continue;
if (*size <= n++)
break;
if (!p->pfik_tzero)
p->pfik_tzero = time_second;
bcopy(p, buf++, sizeof(*buf));
nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p);
}
*size = n;
}
static int
pfi_skip_if(const char *filter, struct pfi_kif *p)
{
int n;
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');
}
int
pfi_set_flags(const char *name, int flags)
{
struct pfi_kif *p;
RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) {
if (pfi_skip_if(name, p))
continue;
p->pfik_flags |= flags;
}
return (0);
}
int
pfi_clear_flags(const char *name, int flags)
{
struct pfi_kif *p;
RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) {
if (pfi_skip_if(name, p))
continue;
p->pfik_flags &= ~flags;
}
return (0);
}
/* from pf_print_state.c */
static 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);
}
static void
pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp)
{
CURVNET_SET(ifp->if_vnet);
if (V_pf_vnet_active == 0) {
/* Avoid teardown race in the least expensive way. */
CURVNET_RESTORE();
return;
}
pfi_attach_ifnet(ifp);
#ifdef ALTQ
PF_RULES_WLOCK();
pf_altq_ifnet_event(ifp, 0);
PF_RULES_WUNLOCK();
#endif
CURVNET_RESTORE();
}
static void
pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp)
{
struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif;
if (kif == NULL)
return;
CURVNET_SET(ifp->if_vnet);
if (V_pf_vnet_active == 0) {
/* Avoid teardown race in the least expensive way. */
CURVNET_RESTORE();
return;
}
PF_RULES_WLOCK();
V_pfi_update++;
pfi_kif_update(kif);
kif->pfik_ifp = NULL;
ifp->if_pf_kif = NULL;
#ifdef ALTQ
pf_altq_ifnet_event(ifp, 1);
#endif
PF_RULES_WUNLOCK();
CURVNET_RESTORE();
}
static void
pfi_attach_group_event(void *arg , struct ifg_group *ifg)
{
CURVNET_SET((struct vnet *)arg);
if (V_pf_vnet_active == 0) {
/* Avoid teardown race in the least expensive way. */
CURVNET_RESTORE();
return;
}
pfi_attach_ifgroup(ifg);
CURVNET_RESTORE();
}
static void
pfi_change_group_event(void *arg, char *gname)
{
struct pfi_kif *kif;
CURVNET_SET((struct vnet *)arg);
if (V_pf_vnet_active == 0) {
/* Avoid teardown race in the least expensive way. */
CURVNET_RESTORE();
return;
}
kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
PF_RULES_WLOCK();
V_pfi_update++;
kif = pfi_kif_attach(kif, gname);
pfi_kif_update(kif);
PF_RULES_WUNLOCK();
CURVNET_RESTORE();
}
static void
pfi_detach_group_event(void *arg, struct ifg_group *ifg)
{
struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif;
if (kif == NULL)
return;
CURVNET_SET((struct vnet *)arg);
if (V_pf_vnet_active == 0) {
/* Avoid teardown race in the least expensive way. */
CURVNET_RESTORE();
return;
}
PF_RULES_WLOCK();
V_pfi_update++;
kif->pfik_group = NULL;
ifg->ifg_pf_kif = NULL;
PF_RULES_WUNLOCK();
CURVNET_RESTORE();
}
static void
pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp)
{
if (ifp->if_pf_kif == NULL)
return;
CURVNET_SET(ifp->if_vnet);
if (V_pf_vnet_active == 0) {
/* Avoid teardown race in the least expensive way. */
CURVNET_RESTORE();
return;
}
PF_RULES_WLOCK();
if (ifp && ifp->if_pf_kif) {
V_pfi_update++;
pfi_kif_update(ifp->if_pf_kif);
}
PF_RULES_WUNLOCK();
CURVNET_RESTORE();
}
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