diff options
Diffstat (limited to 'sys/netpfil/pf/pf_if.c')
-rw-r--r-- | sys/netpfil/pf/pf_if.c | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/sys/netpfil/pf/pf_if.c b/sys/netpfil/pf/pf_if.c new file mode 100644 index 0000000..c010b65 --- /dev/null +++ b/sys/netpfil/pf/pf_if.c @@ -0,0 +1,859 @@ +/* $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk Exp $ */ + +/* + * Copyright 2005 Henning Brauer <henning@openbsd.org> + * Copyright 2005 Ryan McBride <mcbride@openbsd.org> + * 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. + */ + +#include <sys/cdefs.h> + +__FBSDID("$FreeBSD$"); + +#include "opt_inet.h" +#include "opt_inet6.h" + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/socket.h> + +#include <net/if.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 + +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; + +void +pfi_initialize(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); + + mtx_init(&pfi_unlnkdkifs_mtx, "pf unlinked interfaces", NULL, MTX_DEF); + + 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(); + + 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(void) +{ + struct pfi_kif *p; + + 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); + + V_pfi_all = NULL; + while ((p = RB_MIN(pfi_ifhead, &V_pfi_ifs))) { + RB_REMOVE(pfi_ifhead, &V_pfi_ifs, p); + free(p, PFI_MTYPE); + } + + while ((p = LIST_FIRST(&V_pfi_unlinked_kifs))) { + LIST_REMOVE(p, pfik_list); + free(p, PFI_MTYPE); + } + + mtx_destroy(&pfi_unlnkdkifs_mtx); + + free(V_pfi_buffer, PFI_MTYPE); +} + +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(); + TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next) + pfi_instance_add(ifgm->ifgm_ifp, net, flags); + IFNET_RUNLOCK(); + } + + 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(V_pfi_buffer, p, V_pfi_buffer_cnt * 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) + 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); + 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; + + CURVNET_SET(ifp->if_vnet); + 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); + pfi_attach_ifgroup(ifg); + CURVNET_RESTORE(); +} + +static void +pfi_change_group_event(void *arg, char *gname) +{ + struct pfi_kif *kif; + + kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK); + + CURVNET_SET((struct vnet *)arg); + 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; + + CURVNET_SET((struct vnet *)arg); + 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) +{ + + CURVNET_SET(ifp->if_vnet); + PF_RULES_WLOCK(); + if (ifp && ifp->if_pf_kif) { + V_pfi_update++; + pfi_kif_update(ifp->if_pf_kif); + } + PF_RULES_WUNLOCK(); + CURVNET_RESTORE(); +} |