Summary: In preparation of making if_t completely opaque outside of the netstack, explicitly include the header. <net/if_var.h> will stop including the header in the future. Sponsored by: Juniper Networks, Inc. Reviewed by: glebius, melifaro Differential Revision: https://reviews.freebsd.org/D38200
1143 lines
28 KiB
C
1143 lines
28 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2001 Daniel Hartmeier
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* Copyright (c) 2003 Cedric Berger
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* Copyright (c) 2005 Henning Brauer <henning@openbsd.org>
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* Copyright (c) 2005 Ryan McBride <mcbride@openbsd.org>
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* Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/eventhandler.h>
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#include <sys/lock.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_private.h>
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#include <net/vnet.h>
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#include <net/pfvar.h>
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#include <net/route.h>
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VNET_DEFINE(struct pfi_kkif *, pfi_all);
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VNET_DEFINE_STATIC(long, pfi_update);
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#define V_pfi_update VNET(pfi_update)
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#define PFI_BUFFER_MAX 0x10000
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VNET_DECLARE(int, pf_vnet_active);
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#define V_pf_vnet_active VNET(pf_vnet_active)
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VNET_DEFINE_STATIC(struct pfr_addr *, pfi_buffer);
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VNET_DEFINE_STATIC(int, pfi_buffer_cnt);
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VNET_DEFINE_STATIC(int, pfi_buffer_max);
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#define V_pfi_buffer VNET(pfi_buffer)
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#define V_pfi_buffer_cnt VNET(pfi_buffer_cnt)
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#define V_pfi_buffer_max VNET(pfi_buffer_max)
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#ifdef PF_WANT_32_TO_64_COUNTER
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VNET_DEFINE(struct allkiflist_head, pf_allkiflist);
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VNET_DEFINE(size_t, pf_allkifcount);
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VNET_DEFINE(struct pfi_kkif *, pf_kifmarker);
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#endif
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eventhandler_tag pfi_attach_cookie;
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eventhandler_tag pfi_detach_cookie;
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eventhandler_tag pfi_attach_group_cookie;
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eventhandler_tag pfi_change_group_cookie;
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eventhandler_tag pfi_detach_group_cookie;
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eventhandler_tag pfi_ifaddr_event_cookie;
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static void pfi_attach_ifnet(struct ifnet *, struct pfi_kkif *);
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static void pfi_attach_ifgroup(struct ifg_group *, struct pfi_kkif *);
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static void pfi_kkif_update(struct pfi_kkif *);
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static void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
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static void pfi_table_update(struct pfr_ktable *, struct pfi_kkif *, int,
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int);
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static void pfi_instance_add(struct ifnet *, int, int);
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static void pfi_address_add(struct sockaddr *, int, int);
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static int pfi_kkif_compare(struct pfi_kkif *, struct pfi_kkif *);
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static int pfi_skip_if(const char *, struct pfi_kkif *);
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static int pfi_unmask(void *);
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static void pfi_attach_ifnet_event(void * __unused, struct ifnet *);
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static void pfi_detach_ifnet_event(void * __unused, struct ifnet *);
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static void pfi_attach_group_event(void * __unused, struct ifg_group *);
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static void pfi_change_group_event(void * __unused, char *);
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static void pfi_detach_group_event(void * __unused, struct ifg_group *);
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static void pfi_ifaddr_event(void * __unused, struct ifnet *);
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RB_HEAD(pfi_ifhead, pfi_kkif);
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static RB_PROTOTYPE(pfi_ifhead, pfi_kkif, pfik_tree, pfi_kkif_compare);
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static RB_GENERATE(pfi_ifhead, pfi_kkif, pfik_tree, pfi_kkif_compare);
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VNET_DEFINE_STATIC(struct pfi_ifhead, pfi_ifs);
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#define V_pfi_ifs VNET(pfi_ifs)
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#define PFI_BUFFER_MAX 0x10000
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MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database");
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LIST_HEAD(pfi_list, pfi_kkif);
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VNET_DEFINE_STATIC(struct pfi_list, pfi_unlinked_kifs);
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#define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs)
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static struct mtx pfi_unlnkdkifs_mtx;
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MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces",
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MTX_DEF);
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void
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pfi_initialize_vnet(void)
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{
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struct pfi_list kifs = LIST_HEAD_INITIALIZER();
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struct epoch_tracker et;
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struct pfi_kkif *kif;
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struct ifg_group *ifg;
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struct ifnet *ifp;
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int nkifs;
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V_pfi_buffer_max = 64;
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V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer),
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PFI_MTYPE, M_WAITOK);
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nkifs = 1; /* one for V_pfi_all */
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IFNET_RLOCK();
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CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
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nkifs++;
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CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
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nkifs++;
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for (int n = 0; n < nkifs; n++) {
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kif = pf_kkif_create(M_WAITOK);
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LIST_INSERT_HEAD(&kifs, kif, pfik_list);
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}
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NET_EPOCH_ENTER(et);
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PF_RULES_WLOCK();
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kif = LIST_FIRST(&kifs);
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LIST_REMOVE(kif, pfik_list);
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V_pfi_all = pfi_kkif_attach(kif, IFG_ALL);
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CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) {
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kif = LIST_FIRST(&kifs);
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LIST_REMOVE(kif, pfik_list);
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pfi_attach_ifgroup(ifg, kif);
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}
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CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
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kif = LIST_FIRST(&kifs);
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LIST_REMOVE(kif, pfik_list);
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pfi_attach_ifnet(ifp, kif);
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}
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PF_RULES_WUNLOCK();
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NET_EPOCH_EXIT(et);
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IFNET_RUNLOCK();
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MPASS(LIST_EMPTY(&kifs));
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}
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void
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pfi_initialize(void)
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{
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pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event,
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pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
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pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event,
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pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
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pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event,
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pfi_attach_group_event, NULL, EVENTHANDLER_PRI_ANY);
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pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event,
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pfi_change_group_event, NULL, EVENTHANDLER_PRI_ANY);
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pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event,
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pfi_detach_group_event, NULL, EVENTHANDLER_PRI_ANY);
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pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event,
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pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
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}
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void
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pfi_cleanup_vnet(void)
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{
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struct pfi_kkif *kif;
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PF_RULES_WASSERT();
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V_pfi_all = NULL;
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while ((kif = RB_MIN(pfi_ifhead, &V_pfi_ifs))) {
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RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif);
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if (kif->pfik_group)
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kif->pfik_group->ifg_pf_kif = NULL;
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if (kif->pfik_ifp) {
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if_rele(kif->pfik_ifp);
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kif->pfik_ifp->if_pf_kif = NULL;
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}
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pf_kkif_free(kif);
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}
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mtx_lock(&pfi_unlnkdkifs_mtx);
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while ((kif = LIST_FIRST(&V_pfi_unlinked_kifs))) {
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LIST_REMOVE(kif, pfik_list);
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pf_kkif_free(kif);
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}
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mtx_unlock(&pfi_unlnkdkifs_mtx);
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free(V_pfi_buffer, PFI_MTYPE);
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}
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void
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pfi_cleanup(void)
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{
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EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie);
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EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie);
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EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie);
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EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie);
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EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie);
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EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie);
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}
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struct pfi_kkif*
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pf_kkif_create(int flags)
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{
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struct pfi_kkif *kif;
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#ifdef PF_WANT_32_TO_64_COUNTER
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bool wowned;
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#endif
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kif = malloc(sizeof(*kif), PFI_MTYPE, flags | M_ZERO);
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if (! kif)
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return (kif);
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for (int i = 0; i < 2; i++) {
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for (int j = 0; j < 2; j++) {
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for (int k = 0; k < 2; k++) {
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if (pf_counter_u64_init(&kif->pfik_packets[i][j][k], flags) != 0) {
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pf_kkif_free(kif);
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return (NULL);
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}
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if (pf_counter_u64_init(&kif->pfik_bytes[i][j][k], flags) != 0) {
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pf_kkif_free(kif);
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return (NULL);
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}
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}
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}
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}
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#ifdef PF_WANT_32_TO_64_COUNTER
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wowned = PF_RULES_WOWNED();
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if (!wowned)
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PF_RULES_WLOCK();
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LIST_INSERT_HEAD(&V_pf_allkiflist, kif, pfik_allkiflist);
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V_pf_allkifcount++;
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if (!wowned)
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PF_RULES_WUNLOCK();
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#endif
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return (kif);
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}
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void
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pf_kkif_free(struct pfi_kkif *kif)
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{
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#ifdef PF_WANT_32_TO_64_COUNTER
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bool wowned;
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#endif
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if (! kif)
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return;
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#ifdef PF_WANT_32_TO_64_COUNTER
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wowned = PF_RULES_WOWNED();
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if (!wowned)
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PF_RULES_WLOCK();
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LIST_REMOVE(kif, pfik_allkiflist);
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V_pf_allkifcount--;
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if (!wowned)
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PF_RULES_WUNLOCK();
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#endif
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for (int i = 0; i < 2; i++) {
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for (int j = 0; j < 2; j++) {
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for (int k = 0; k < 2; k++) {
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pf_counter_u64_deinit(&kif->pfik_packets[i][j][k]);
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pf_counter_u64_deinit(&kif->pfik_bytes[i][j][k]);
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}
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}
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}
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free(kif, PFI_MTYPE);
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}
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void
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pf_kkif_zero(struct pfi_kkif *kif)
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{
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for (int i = 0; i < 2; i++) {
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for (int j = 0; j < 2; j++) {
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for (int k = 0; k < 2; k++) {
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pf_counter_u64_zero(&kif->pfik_packets[i][j][k]);
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pf_counter_u64_zero(&kif->pfik_bytes[i][j][k]);
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}
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}
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}
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kif->pfik_tzero = time_second;
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}
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struct pfi_kkif *
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pfi_kkif_find(const char *kif_name)
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{
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struct pfi_kif_cmp s;
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PF_RULES_ASSERT();
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memset(&s, 0, sizeof(s));
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strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name));
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return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kkif *)&s));
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}
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struct pfi_kkif *
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pfi_kkif_attach(struct pfi_kkif *kif, const char *kif_name)
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{
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struct pfi_kkif *kif1;
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PF_RULES_WASSERT();
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KASSERT(kif != NULL, ("%s: null kif", __func__));
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kif1 = pfi_kkif_find(kif_name);
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if (kif1 != NULL) {
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pf_kkif_free(kif);
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return (kif1);
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}
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pf_kkif_zero(kif);
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strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
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/*
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* It seems that the value of time_second is in unintialzied state
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* when pf sets interface statistics clear time in boot phase if pf
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* was statically linked to kernel. Instead of setting the bogus
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* time value have pfi_get_ifaces handle this case. In
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* pfi_get_ifaces it uses time_second if it sees the time is 0.
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*/
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kif->pfik_tzero = time_second > 1 ? time_second : 0;
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TAILQ_INIT(&kif->pfik_dynaddrs);
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RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif);
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return (kif);
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}
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void
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pfi_kkif_ref(struct pfi_kkif *kif)
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{
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PF_RULES_WASSERT();
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kif->pfik_rulerefs++;
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}
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static void
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pfi_kkif_remove_if_unref(struct pfi_kkif *kif)
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{
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PF_RULES_WASSERT();
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if (kif->pfik_rulerefs > 0)
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return;
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/* kif referencing an existing ifnet or group or holding flags should
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* exist. */
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if (kif->pfik_ifp != NULL || kif->pfik_group != NULL ||
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kif == V_pfi_all || kif->pfik_flags != 0)
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return;
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RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif);
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kif->pfik_flags |= PFI_IFLAG_REFS;
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mtx_lock(&pfi_unlnkdkifs_mtx);
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LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list);
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mtx_unlock(&pfi_unlnkdkifs_mtx);
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}
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void
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pfi_kkif_unref(struct pfi_kkif *kif)
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{
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PF_RULES_WASSERT();
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KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif));
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kif->pfik_rulerefs--;
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pfi_kkif_remove_if_unref(kif);
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}
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void
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pfi_kkif_purge(void)
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{
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struct pfi_kkif *kif, *kif1;
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/*
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* Do naive mark-and-sweep garbage collecting of old kifs.
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* Reference flag is raised by pf_purge_expired_states().
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*/
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mtx_lock(&pfi_unlnkdkifs_mtx);
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LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) {
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if (!(kif->pfik_flags & PFI_IFLAG_REFS)) {
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LIST_REMOVE(kif, pfik_list);
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pf_kkif_free(kif);
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} else
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kif->pfik_flags &= ~PFI_IFLAG_REFS;
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}
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mtx_unlock(&pfi_unlnkdkifs_mtx);
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}
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int
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pfi_kkif_match(struct pfi_kkif *rule_kif, struct pfi_kkif *packet_kif)
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{
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struct ifg_list *p;
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NET_EPOCH_ASSERT();
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if (rule_kif == NULL || rule_kif == packet_kif)
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return (1);
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if (rule_kif->pfik_group != NULL) {
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CK_STAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next)
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if (p->ifgl_group == rule_kif->pfik_group)
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return (1);
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}
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return (0);
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}
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static void
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pfi_attach_ifnet(struct ifnet *ifp, struct pfi_kkif *kif)
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{
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PF_RULES_WASSERT();
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V_pfi_update++;
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kif = pfi_kkif_attach(kif, ifp->if_xname);
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if_ref(ifp);
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kif->pfik_ifp = ifp;
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ifp->if_pf_kif = kif;
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pfi_kkif_update(kif);
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}
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|
static void
|
|
pfi_attach_ifgroup(struct ifg_group *ifg, struct pfi_kkif *kif)
|
|
{
|
|
|
|
PF_RULES_WASSERT();
|
|
|
|
V_pfi_update++;
|
|
kif = pfi_kkif_attach(kif, ifg->ifg_group);
|
|
kif->pfik_group = ifg;
|
|
ifg->ifg_pf_kif = kif;
|
|
}
|
|
|
|
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 epoch_tracker et;
|
|
struct pfi_dynaddr *dyn;
|
|
char tblname[PF_TABLE_NAME_SIZE];
|
|
struct pf_kruleset *ruleset = NULL;
|
|
struct pfi_kkif *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 = pf_kkif_create(M_NOWAIT)) == NULL) {
|
|
free(dyn, PFI_MTYPE);
|
|
return (ENOMEM);
|
|
}
|
|
|
|
if (!strcmp(aw->v.ifname, "self"))
|
|
dyn->pfid_kif = pfi_kkif_attach(kif, IFG_ALL);
|
|
else
|
|
dyn->pfid_kif = pfi_kkif_attach(kif, aw->v.ifname);
|
|
kif = NULL;
|
|
pfi_kkif_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_kruleset(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;
|
|
NET_EPOCH_ENTER(et);
|
|
pfi_kkif_update(dyn->pfid_kif);
|
|
NET_EPOCH_EXIT(et);
|
|
|
|
return (0);
|
|
|
|
_bad:
|
|
if (dyn->pfid_kt != NULL)
|
|
pfr_detach_table(dyn->pfid_kt);
|
|
if (ruleset != NULL)
|
|
pf_remove_if_empty_kruleset(ruleset);
|
|
pfi_kkif_unref(dyn->pfid_kif);
|
|
free(dyn, PFI_MTYPE);
|
|
|
|
return (rv);
|
|
}
|
|
|
|
static void
|
|
pfi_kkif_update(struct pfi_kkif *kif)
|
|
{
|
|
struct ifg_list *ifgl;
|
|
struct ifg_member *ifgm;
|
|
struct pfi_dynaddr *p;
|
|
struct pfi_kkif *tmpkif;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
PF_RULES_WASSERT();
|
|
|
|
/* update all dynaddr */
|
|
TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
|
|
pfi_dynaddr_update(p);
|
|
|
|
/* Apply group flags to new members. */
|
|
if (kif->pfik_group != NULL) {
|
|
CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members,
|
|
ifgm_next) {
|
|
tmpkif = (struct pfi_kkif *)ifgm->ifgm_ifp->if_pf_kif;
|
|
if (tmpkif == NULL)
|
|
continue;
|
|
|
|
tmpkif->pfik_flags |= kif->pfik_flags;
|
|
}
|
|
}
|
|
|
|
/* again for all groups kif is member of */
|
|
if (kif->pfik_ifp != NULL) {
|
|
CK_STAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next)
|
|
pfi_kkif_update((struct pfi_kkif *)
|
|
ifgl->ifgl_group->ifg_pf_kif);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pfi_dynaddr_update(struct pfi_dynaddr *dyn)
|
|
{
|
|
struct pfi_kkif *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_kkif *kif, int net, int flags)
|
|
{
|
|
int e, size2 = 0;
|
|
struct ifg_member *ifgm;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
|
|
V_pfi_buffer_cnt = 0;
|
|
|
|
if (kif->pfik_ifp != NULL)
|
|
pfi_instance_add(kif->pfik_ifp, net, flags);
|
|
else if (kif->pfik_group != NULL) {
|
|
CK_STAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next)
|
|
pfi_instance_add(ifgm->ifgm_ifp, net, flags);
|
|
}
|
|
|
|
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;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
|
|
CK_STAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) {
|
|
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 | PFI_AFLAG_NOALIAS)) &&
|
|
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);
|
|
}
|
|
}
|
|
|
|
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++;
|
|
memset(p, 0, 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_kkif_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_kkif_compare(struct pfi_kkif *p, struct pfi_kkif *q)
|
|
{
|
|
return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
|
|
}
|
|
|
|
void
|
|
pfi_update_status(const char *name, struct pf_status *pfs)
|
|
{
|
|
struct pfi_kkif *p;
|
|
struct pfi_kif_cmp key;
|
|
struct ifg_member p_member, *ifgm;
|
|
CK_STAILQ_HEAD(, ifg_member) ifg_members;
|
|
int i, j, k;
|
|
|
|
if (pfs) {
|
|
memset(pfs->pcounters, 0, sizeof(pfs->pcounters));
|
|
memset(pfs->bcounters, 0, sizeof(pfs->bcounters));
|
|
}
|
|
|
|
strlcpy(key.pfik_name, name, sizeof(key.pfik_name));
|
|
p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kkif *)&key);
|
|
if (p == NULL) {
|
|
return;
|
|
}
|
|
|
|
if (p->pfik_group != NULL) {
|
|
memcpy(&ifg_members, &p->pfik_group->ifg_members,
|
|
sizeof(ifg_members));
|
|
} else {
|
|
/* build a temporary list for p only */
|
|
memset(&p_member, 0, sizeof(p_member));
|
|
p_member.ifgm_ifp = p->pfik_ifp;
|
|
CK_STAILQ_INIT(&ifg_members);
|
|
CK_STAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next);
|
|
}
|
|
CK_STAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) {
|
|
if (ifgm->ifgm_ifp == NULL || ifgm->ifgm_ifp->if_pf_kif == NULL)
|
|
continue;
|
|
p = (struct pfi_kkif *)ifgm->ifgm_ifp->if_pf_kif;
|
|
|
|
/* just clear statistics */
|
|
if (pfs == NULL) {
|
|
pf_kkif_zero(p);
|
|
continue;
|
|
}
|
|
for (i = 0; i < 2; i++)
|
|
for (j = 0; j < 2; j++)
|
|
for (k = 0; k < 2; k++) {
|
|
pfs->pcounters[i][j][k] +=
|
|
pf_counter_u64_fetch(&p->pfik_packets[i][j][k]);
|
|
pfs->bcounters[i][j] +=
|
|
pf_counter_u64_fetch(&p->pfik_bytes[i][j][k]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
pf_kkif_to_kif(struct pfi_kkif *kkif, struct pfi_kif *kif)
|
|
{
|
|
|
|
memset(kif, 0, sizeof(*kif));
|
|
strlcpy(kif->pfik_name, kkif->pfik_name, sizeof(kif->pfik_name));
|
|
for (int i = 0; i < 2; i++) {
|
|
for (int j = 0; j < 2; j++) {
|
|
for (int k = 0; k < 2; k++) {
|
|
kif->pfik_packets[i][j][k] =
|
|
pf_counter_u64_fetch(&kkif->pfik_packets[i][j][k]);
|
|
kif->pfik_bytes[i][j][k] =
|
|
pf_counter_u64_fetch(&kkif->pfik_bytes[i][j][k]);
|
|
}
|
|
}
|
|
}
|
|
kif->pfik_flags = kkif->pfik_flags;
|
|
kif->pfik_tzero = kkif->pfik_tzero;
|
|
kif->pfik_rulerefs = kkif->pfik_rulerefs;
|
|
/*
|
|
* Userspace relies on this pointer to decide if this is a group or
|
|
* not. We don't want to share the actual pointer, because it's
|
|
* useless to userspace and leaks kernel memory layout information.
|
|
* So instead we provide 0xfeedcode as 'true' and NULL as 'false'.
|
|
*/
|
|
kif->pfik_group =
|
|
kkif->pfik_group ? (struct ifg_group *)0xfeedc0de : NULL;
|
|
}
|
|
|
|
void
|
|
pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct pfi_kkif *p, *nextp;
|
|
int n = 0;
|
|
|
|
NET_EPOCH_ENTER(et);
|
|
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;
|
|
pf_kkif_to_kif(p, buf++);
|
|
nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p);
|
|
}
|
|
*size = n;
|
|
NET_EPOCH_EXIT(et);
|
|
}
|
|
|
|
static int
|
|
pfi_skip_if(const char *filter, struct pfi_kkif *p)
|
|
{
|
|
struct ifg_list *i;
|
|
int n;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
|
|
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); /* group names may not end in a digit */
|
|
if (p->pfik_ifp == NULL)
|
|
return (1);
|
|
CK_STAILQ_FOREACH(i, &p->pfik_ifp->if_groups, ifgl_next)
|
|
if (!strncmp(i->ifgl_group->ifg_group, filter, IFNAMSIZ))
|
|
return (0); /* iface is in group "filter" */
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
pfi_set_flags(const char *name, int flags)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct pfi_kkif *p, *kif;
|
|
|
|
kif = pf_kkif_create(M_NOWAIT);
|
|
if (kif == NULL)
|
|
return (ENOMEM);
|
|
|
|
NET_EPOCH_ENTER(et);
|
|
|
|
kif = pfi_kkif_attach(kif, name);
|
|
|
|
RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) {
|
|
if (pfi_skip_if(name, p))
|
|
continue;
|
|
p->pfik_flags |= flags;
|
|
}
|
|
NET_EPOCH_EXIT(et);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
pfi_clear_flags(const char *name, int flags)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct pfi_kkif *p, *tmp;
|
|
|
|
NET_EPOCH_ENTER(et);
|
|
RB_FOREACH_SAFE(p, pfi_ifhead, &V_pfi_ifs, tmp) {
|
|
if (pfi_skip_if(name, p))
|
|
continue;
|
|
p->pfik_flags &= ~flags;
|
|
|
|
if (p->pfik_ifp == NULL && p->pfik_group == NULL &&
|
|
p->pfik_flags == 0 && p->pfik_rulerefs == 0) {
|
|
/* Delete this kif. */
|
|
RB_REMOVE(pfi_ifhead, &V_pfi_ifs, p);
|
|
pf_kkif_free(p);
|
|
}
|
|
}
|
|
NET_EPOCH_EXIT(et);
|
|
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)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct pfi_kkif *kif;
|
|
|
|
if (V_pf_vnet_active == 0) {
|
|
/* Avoid teardown race in the least expensive way. */
|
|
return;
|
|
}
|
|
kif = pf_kkif_create(M_NOWAIT);
|
|
NET_EPOCH_ENTER(et);
|
|
PF_RULES_WLOCK();
|
|
pfi_attach_ifnet(ifp, kif);
|
|
#ifdef ALTQ
|
|
pf_altq_ifnet_event(ifp, 0);
|
|
#endif
|
|
PF_RULES_WUNLOCK();
|
|
NET_EPOCH_EXIT(et);
|
|
}
|
|
|
|
static void
|
|
pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct pfi_kkif *kif = (struct pfi_kkif *)ifp->if_pf_kif;
|
|
|
|
if (pfsync_detach_ifnet_ptr)
|
|
pfsync_detach_ifnet_ptr(ifp);
|
|
|
|
if (kif == NULL)
|
|
return;
|
|
|
|
if (V_pf_vnet_active == 0) {
|
|
/* Avoid teardown race in the least expensive way. */
|
|
return;
|
|
}
|
|
|
|
NET_EPOCH_ENTER(et);
|
|
PF_RULES_WLOCK();
|
|
V_pfi_update++;
|
|
pfi_kkif_update(kif);
|
|
|
|
if (kif->pfik_ifp)
|
|
if_rele(kif->pfik_ifp);
|
|
|
|
kif->pfik_ifp = NULL;
|
|
ifp->if_pf_kif = NULL;
|
|
#ifdef ALTQ
|
|
pf_altq_ifnet_event(ifp, 1);
|
|
#endif
|
|
pfi_kkif_remove_if_unref(kif);
|
|
|
|
PF_RULES_WUNLOCK();
|
|
NET_EPOCH_EXIT(et);
|
|
}
|
|
|
|
static void
|
|
pfi_attach_group_event(void *arg __unused, struct ifg_group *ifg)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct pfi_kkif *kif;
|
|
|
|
if (V_pf_vnet_active == 0) {
|
|
/* Avoid teardown race in the least expensive way. */
|
|
return;
|
|
}
|
|
kif = pf_kkif_create(M_WAITOK);
|
|
NET_EPOCH_ENTER(et);
|
|
PF_RULES_WLOCK();
|
|
pfi_attach_ifgroup(ifg, kif);
|
|
PF_RULES_WUNLOCK();
|
|
NET_EPOCH_EXIT(et);
|
|
}
|
|
|
|
static void
|
|
pfi_change_group_event(void *arg __unused, char *gname)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct pfi_kkif *kif;
|
|
|
|
if (V_pf_vnet_active == 0) {
|
|
/* Avoid teardown race in the least expensive way. */
|
|
return;
|
|
}
|
|
|
|
kif = pf_kkif_create(M_WAITOK);
|
|
NET_EPOCH_ENTER(et);
|
|
PF_RULES_WLOCK();
|
|
V_pfi_update++;
|
|
kif = pfi_kkif_attach(kif, gname);
|
|
pfi_kkif_update(kif);
|
|
PF_RULES_WUNLOCK();
|
|
NET_EPOCH_EXIT(et);
|
|
}
|
|
|
|
static void
|
|
pfi_detach_group_event(void *arg __unused, struct ifg_group *ifg)
|
|
{
|
|
struct pfi_kkif *kif = (struct pfi_kkif *)ifg->ifg_pf_kif;
|
|
|
|
if (kif == NULL)
|
|
return;
|
|
|
|
if (V_pf_vnet_active == 0) {
|
|
/* Avoid teardown race in the least expensive way. */
|
|
return;
|
|
}
|
|
PF_RULES_WLOCK();
|
|
V_pfi_update++;
|
|
|
|
kif->pfik_group = NULL;
|
|
ifg->ifg_pf_kif = NULL;
|
|
|
|
pfi_kkif_remove_if_unref(kif);
|
|
PF_RULES_WUNLOCK();
|
|
}
|
|
|
|
static void
|
|
pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp)
|
|
{
|
|
|
|
KASSERT(ifp, ("ifp == NULL"));
|
|
|
|
if (ifp->if_pf_kif == NULL)
|
|
return;
|
|
|
|
if (V_pf_vnet_active == 0) {
|
|
/* Avoid teardown race in the least expensive way. */
|
|
return;
|
|
}
|
|
PF_RULES_WLOCK();
|
|
if (ifp->if_pf_kif) {
|
|
struct epoch_tracker et;
|
|
|
|
V_pfi_update++;
|
|
NET_EPOCH_ENTER(et);
|
|
pfi_kkif_update(ifp->if_pf_kif);
|
|
NET_EPOCH_EXIT(et);
|
|
}
|
|
PF_RULES_WUNLOCK();
|
|
}
|