/* $OpenBSD: if_veb.c,v 1.32 2023/11/23 23:45:10 dlg Exp $ */ /* * Copyright (c) 2021 David Gwynne * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "bpfilter.h" #include "pf.h" #include "vlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET6 #include #include #include #endif #if 0 && defined(IPSEC) /* * IPsec handling is disabled in veb until getting and using tdbs is mpsafe. */ #include #include #endif #include #include #if NBPFILTER > 0 #include #endif #if NPF > 0 #include #endif #if NVLAN > 0 #include #endif /* SIOCBRDGIFFLGS, SIOCBRDGIFFLGS */ #define VEB_IFBIF_FLAGS (IFBIF_LEARNING|IFBIF_DISCOVER|IFBIF_BLOCKNONIP) struct veb_rule { TAILQ_ENTRY(veb_rule) vr_entry; SMR_TAILQ_ENTRY(veb_rule) vr_lentry[2]; uint16_t vr_flags; #define VEB_R_F_IN (1U << 0) #define VEB_R_F_OUT (1U << 1) #define VEB_R_F_SRC (1U << 2) #define VEB_R_F_DST (1U << 3) #define VEB_R_F_ARP (1U << 4) #define VEB_R_F_RARP (1U << 5) #define VEB_R_F_SHA (1U << 6) #define VEB_R_F_SPA (1U << 7) #define VEB_R_F_THA (1U << 8) #define VEB_R_F_TPA (1U << 9) uint16_t vr_arp_op; uint64_t vr_src; uint64_t vr_dst; struct ether_addr vr_arp_sha; struct ether_addr vr_arp_tha; struct in_addr vr_arp_spa; struct in_addr vr_arp_tpa; unsigned int vr_action; #define VEB_R_MATCH 0 #define VEB_R_PASS 1 #define VEB_R_BLOCK 2 int vr_pftag; }; TAILQ_HEAD(veb_rules, veb_rule); SMR_TAILQ_HEAD(veb_rule_list, veb_rule); struct veb_softc; struct veb_port { struct ifnet *p_ifp0; struct refcnt p_refs; int (*p_enqueue)(struct ifnet *, struct mbuf *); int (*p_ioctl)(struct ifnet *, u_long, caddr_t); int (*p_output)(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); struct task p_ltask; struct task p_dtask; struct veb_softc *p_veb; struct ether_brport p_brport; unsigned int p_link_state; unsigned int p_bif_flags; uint32_t p_protected; struct veb_rules p_vrl; unsigned int p_nvrl; struct veb_rule_list p_vr_list[2]; #define VEB_RULE_LIST_OUT 0 #define VEB_RULE_LIST_IN 1 }; struct veb_ports { struct refcnt m_refs; unsigned int m_count; /* followed by an array of veb_port pointers */ }; struct veb_softc { struct ifnet sc_if; unsigned int sc_dead; struct etherbridge sc_eb; struct rwlock sc_rule_lock; struct veb_ports *sc_ports; struct veb_ports *sc_spans; }; #define DPRINTF(_sc, fmt...) do { \ if (ISSET((_sc)->sc_if.if_flags, IFF_DEBUG)) \ printf(fmt); \ } while (0) static int veb_clone_create(struct if_clone *, int); static int veb_clone_destroy(struct ifnet *); static int veb_ioctl(struct ifnet *, u_long, caddr_t); static void veb_input(struct ifnet *, struct mbuf *); static int veb_enqueue(struct ifnet *, struct mbuf *); static int veb_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); static void veb_start(struct ifqueue *); static int veb_up(struct veb_softc *); static int veb_down(struct veb_softc *); static int veb_iff(struct veb_softc *); static void veb_p_linkch(void *); static void veb_p_detach(void *); static int veb_p_ioctl(struct ifnet *, u_long, caddr_t); static int veb_p_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); static inline size_t veb_ports_size(unsigned int n) { /* use of _ALIGN is inspired by CMSGs */ return _ALIGN(sizeof(struct veb_ports)) + n * sizeof(struct veb_port *); } static inline struct veb_port ** veb_ports_array(struct veb_ports *m) { return (struct veb_port **)((caddr_t)m + _ALIGN(sizeof(*m))); } static inline void veb_ports_free(struct veb_ports *); static void veb_p_unlink(struct veb_softc *, struct veb_port *); static void veb_p_fini(struct veb_port *); static void veb_p_dtor(struct veb_softc *, struct veb_port *); static int veb_add_port(struct veb_softc *, const struct ifbreq *, unsigned int); static int veb_del_port(struct veb_softc *, const struct ifbreq *, unsigned int); static int veb_port_list(struct veb_softc *, struct ifbifconf *); static int veb_port_set_flags(struct veb_softc *, struct ifbreq *); static int veb_port_get_flags(struct veb_softc *, struct ifbreq *); static int veb_port_set_protected(struct veb_softc *, const struct ifbreq *); static int veb_add_addr(struct veb_softc *, const struct ifbareq *); static int veb_del_addr(struct veb_softc *, const struct ifbareq *); static int veb_rule_add(struct veb_softc *, const struct ifbrlreq *); static int veb_rule_list_flush(struct veb_softc *, const struct ifbrlreq *); static void veb_rule_list_free(struct veb_rule *); static int veb_rule_list_get(struct veb_softc *, struct ifbrlconf *); static int veb_eb_port_cmp(void *, void *, void *); static void *veb_eb_port_take(void *, void *); static void veb_eb_port_rele(void *, void *); static size_t veb_eb_port_ifname(void *, char *, size_t, void *); static void veb_eb_port_sa(void *, struct sockaddr_storage *, void *); static void veb_eb_brport_take(void *); static void veb_eb_brport_rele(void *); static const struct etherbridge_ops veb_etherbridge_ops = { veb_eb_port_cmp, veb_eb_port_take, veb_eb_port_rele, veb_eb_port_ifname, veb_eb_port_sa, }; static struct if_clone veb_cloner = IF_CLONE_INITIALIZER("veb", veb_clone_create, veb_clone_destroy); static struct pool veb_rule_pool; static int vport_clone_create(struct if_clone *, int); static int vport_clone_destroy(struct ifnet *); struct vport_softc { struct arpcom sc_ac; unsigned int sc_dead; }; static int vport_if_enqueue(struct ifnet *, struct mbuf *); static int vport_ioctl(struct ifnet *, u_long, caddr_t); static int vport_enqueue(struct ifnet *, struct mbuf *); static void vport_start(struct ifqueue *); static int vport_up(struct vport_softc *); static int vport_down(struct vport_softc *); static int vport_iff(struct vport_softc *); static struct if_clone vport_cloner = IF_CLONE_INITIALIZER("vport", vport_clone_create, vport_clone_destroy); void vebattach(int count) { if_clone_attach(&veb_cloner); if_clone_attach(&vport_cloner); } static int veb_clone_create(struct if_clone *ifc, int unit) { struct veb_softc *sc; struct ifnet *ifp; int error; if (veb_rule_pool.pr_size == 0) { pool_init(&veb_rule_pool, sizeof(struct veb_rule), 0, IPL_SOFTNET, 0, "vebrpl", NULL); } sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO|M_CANFAIL); if (sc == NULL) return (ENOMEM); rw_init(&sc->sc_rule_lock, "vebrlk"); sc->sc_ports = NULL; sc->sc_spans = NULL; ifp = &sc->sc_if; snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", ifc->ifc_name, unit); error = etherbridge_init(&sc->sc_eb, ifp->if_xname, &veb_etherbridge_ops, sc); if (error != 0) { free(sc, M_DEVBUF, sizeof(*sc)); return (error); } ifp->if_softc = sc; ifp->if_type = IFT_BRIDGE; ifp->if_hdrlen = ETHER_HDR_LEN; ifp->if_hardmtu = ETHER_MAX_HARDMTU_LEN; ifp->if_ioctl = veb_ioctl; ifp->if_input = veb_input; ifp->if_output = veb_output; ifp->if_enqueue = veb_enqueue; ifp->if_qstart = veb_start; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_xflags = IFXF_CLONED | IFXF_MPSAFE; if_counters_alloc(ifp); if_attach(ifp); if_alloc_sadl(ifp); #if NBPFILTER > 0 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, ETHER_HDR_LEN); #endif return (0); } static int veb_clone_destroy(struct ifnet *ifp) { struct veb_softc *sc = ifp->if_softc; struct veb_ports *mp, *ms; struct veb_port **ps; struct veb_port *p; unsigned int i; NET_LOCK(); sc->sc_dead = 1; if (ISSET(ifp->if_flags, IFF_RUNNING)) veb_down(sc); NET_UNLOCK(); if_detach(ifp); NET_LOCK(); /* * this is an upside down version of veb_p_dtor() and * veb_ports_destroy() to avoid a lot of malloc/free and * smr_barrier calls if we remove ports one by one. */ mp = SMR_PTR_GET_LOCKED(&sc->sc_ports); SMR_PTR_SET_LOCKED(&sc->sc_ports, NULL); if (mp != NULL) { ps = veb_ports_array(mp); for (i = 0; i < mp->m_count; i++) veb_p_unlink(sc, ps[i]); } ms = SMR_PTR_GET_LOCKED(&sc->sc_spans); SMR_PTR_SET_LOCKED(&sc->sc_spans, NULL); if (ms != NULL) { ps = veb_ports_array(ms); for (i = 0; i < ms->m_count; i++) veb_p_unlink(sc, ps[i]); } if (mp != NULL || ms != NULL) { smr_barrier(); /* everything everywhere all at once */ if (mp != NULL) { refcnt_finalize(&mp->m_refs, "vebdtor"); ps = veb_ports_array(mp); for (i = 0; i < mp->m_count; i++) { p = ps[i]; /* the ports map holds a port ref */ refcnt_rele(&p->p_refs); /* now we can finalize the port */ veb_p_fini(p); } veb_ports_free(mp); } if (ms != NULL) { refcnt_finalize(&ms->m_refs, "vebdtor"); ps = veb_ports_array(ms); for (i = 0; i < ms->m_count; i++) { p = ps[i]; /* the ports map holds a port ref */ refcnt_rele(&p->p_refs); /* now we can finalize the port */ veb_p_fini(p); } veb_ports_free(ms); } } NET_UNLOCK(); etherbridge_destroy(&sc->sc_eb); free(sc, M_DEVBUF, sizeof(*sc)); return (0); } static struct mbuf * veb_span_input(struct ifnet *ifp0, struct mbuf *m, uint64_t dst, void *brport) { m_freem(m); return (NULL); } static void veb_span(struct veb_softc *sc, struct mbuf *m0) { struct veb_ports *sm; struct veb_port **ps; struct veb_port *p; struct ifnet *ifp0; struct mbuf *m; unsigned int i; smr_read_enter(); sm = SMR_PTR_GET(&sc->sc_spans); if (sm != NULL) refcnt_take(&sm->m_refs); smr_read_leave(); if (sm == NULL) return; ps = veb_ports_array(sm); for (i = 0; i < sm->m_count; i++) { p = ps[i]; ifp0 = p->p_ifp0; if (!ISSET(ifp0->if_flags, IFF_RUNNING)) continue; m = m_dup_pkt(m0, max_linkhdr + ETHER_ALIGN, M_NOWAIT); if (m == NULL) { /* XXX count error */ continue; } if_enqueue(ifp0, m); /* XXX count error */ } refcnt_rele_wake(&sm->m_refs); } static int veb_ip_filter(const struct mbuf *m) { const struct ether_header *eh; eh = mtod(m, struct ether_header *); switch (ntohs(eh->ether_type)) { case ETHERTYPE_IP: case ETHERTYPE_ARP: case ETHERTYPE_REVARP: case ETHERTYPE_IPV6: return (0); default: break; } return (1); } static int veb_vlan_filter(const struct mbuf *m) { const struct ether_header *eh; eh = mtod(m, struct ether_header *); switch (ntohs(eh->ether_type)) { case ETHERTYPE_VLAN: case ETHERTYPE_QINQ: return (1); default: break; } return (0); } static int veb_rule_arp_match(const struct veb_rule *vr, struct mbuf *m) { struct ether_header *eh; struct ether_arp ea; eh = mtod(m, struct ether_header *); if (eh->ether_type != htons(ETHERTYPE_ARP)) return (0); if (m->m_pkthdr.len < sizeof(*eh) + sizeof(ea)) return (0); m_copydata(m, sizeof(*eh), sizeof(ea), (caddr_t)&ea); if (ea.arp_hrd != htons(ARPHRD_ETHER) || ea.arp_pro != htons(ETHERTYPE_IP) || ea.arp_hln != ETHER_ADDR_LEN || ea.arp_pln != sizeof(struct in_addr)) return (0); if (ISSET(vr->vr_flags, VEB_R_F_ARP)) { if (ea.arp_op != htons(ARPOP_REQUEST) && ea.arp_op != htons(ARPOP_REPLY)) return (0); } if (ISSET(vr->vr_flags, VEB_R_F_RARP)) { if (ea.arp_op != htons(ARPOP_REVREQUEST) && ea.arp_op != htons(ARPOP_REVREPLY)) return (0); } if (vr->vr_arp_op != htons(0) && vr->vr_arp_op != ea.arp_op) return (0); if (ISSET(vr->vr_flags, VEB_R_F_SHA) && !ETHER_IS_EQ(&vr->vr_arp_sha, ea.arp_sha)) return (0); if (ISSET(vr->vr_flags, VEB_R_F_THA) && !ETHER_IS_EQ(&vr->vr_arp_tha, ea.arp_tha)) return (0); if (ISSET(vr->vr_flags, VEB_R_F_SPA) && memcmp(&vr->vr_arp_spa, ea.arp_spa, sizeof(vr->vr_arp_spa)) != 0) return (0); if (ISSET(vr->vr_flags, VEB_R_F_TPA) && memcmp(&vr->vr_arp_tpa, ea.arp_tpa, sizeof(vr->vr_arp_tpa)) != 0) return (0); return (1); } static int veb_rule_list_test(struct veb_rule *vr, int dir, struct mbuf *m, uint64_t src, uint64_t dst) { SMR_ASSERT_CRITICAL(); do { if (ISSET(vr->vr_flags, VEB_R_F_ARP|VEB_R_F_RARP) && !veb_rule_arp_match(vr, m)) continue; if (ISSET(vr->vr_flags, VEB_R_F_SRC) && vr->vr_src != src) continue; if (ISSET(vr->vr_flags, VEB_R_F_DST) && vr->vr_dst != dst) continue; if (vr->vr_action == VEB_R_BLOCK) return (VEB_R_BLOCK); #if NPF > 0 pf_tag_packet(m, vr->vr_pftag, -1); #endif if (vr->vr_action == VEB_R_PASS) return (VEB_R_PASS); } while ((vr = SMR_TAILQ_NEXT(vr, vr_lentry[dir])) != NULL); return (VEB_R_PASS); } static inline int veb_rule_filter(struct veb_port *p, int dir, struct mbuf *m, uint64_t src, uint64_t dst) { struct veb_rule *vr; int filter = VEB_R_PASS; smr_read_enter(); vr = SMR_TAILQ_FIRST(&p->p_vr_list[dir]); if (vr != NULL) filter = veb_rule_list_test(vr, dir, m, src, dst); smr_read_leave(); return (filter == VEB_R_BLOCK); } #if NPF > 0 struct veb_pf_ip_family { sa_family_t af; struct mbuf *(*ip_check)(struct ifnet *, struct mbuf *); void (*ip_input)(struct ifnet *, struct mbuf *); }; static const struct veb_pf_ip_family veb_pf_ipv4 = { .af = AF_INET, .ip_check = ipv4_check, .ip_input = ipv4_input, }; #ifdef INET6 static const struct veb_pf_ip_family veb_pf_ipv6 = { .af = AF_INET6, .ip_check = ipv6_check, .ip_input = ipv6_input, }; #endif static struct mbuf * veb_pf(struct ifnet *ifp0, int dir, struct mbuf *m) { struct ether_header *eh, copy; const struct veb_pf_ip_family *fam; int hlen; /* * pf runs on vport interfaces when they enter or leave the * l3 stack, so don't confuse things (even more) by running * pf again here. note that because of this exception the * pf direction on vport interfaces is reversed compared to * other veb ports. */ if (ifp0->if_enqueue == vport_enqueue) return (m); eh = mtod(m, struct ether_header *); switch (ntohs(eh->ether_type)) { case ETHERTYPE_IP: fam = &veb_pf_ipv4; break; #ifdef INET6 case ETHERTYPE_IPV6: fam = &veb_pf_ipv6; break; #endif default: return (m); } copy = *eh; m_adj(m, sizeof(*eh)); m = (*fam->ip_check)(ifp0, m); if (m == NULL) return (NULL); if (pf_test(fam->af, dir, ifp0, &m) != PF_PASS) { m_freem(m); return (NULL); } if (m == NULL) return (NULL); if (dir == PF_IN && ISSET(m->m_pkthdr.pf.flags, PF_TAG_DIVERTED)) { pf_mbuf_unlink_state_key(m); pf_mbuf_unlink_inpcb(m); (*fam->ip_input)(ifp0, m); return (NULL); } hlen = roundup(sizeof(*eh), sizeof(long)); m = m_prepend(m, hlen, M_DONTWAIT); if (m == NULL) return (NULL); /* checksum? */ m_adj(m, hlen - sizeof(*eh)); eh = mtod(m, struct ether_header *); *eh = copy; return (m); } #endif /* NPF > 0 */ #if 0 && defined(IPSEC) static struct mbuf * veb_ipsec_proto_in(struct ifnet *ifp0, struct mbuf *m, int iphlen, /* const */ union sockaddr_union *dst, int poff) { struct tdb *tdb; uint16_t cpi; uint32_t spi; uint8_t proto; /* ipsec_common_input checks for 8 bytes of input, so we do too */ if (m->m_pkthdr.len < iphlen + 2 * sizeof(u_int32_t)) return (m); /* decline */ proto = *(mtod(m, uint8_t *) + poff); /* i'm not a huge fan of how these headers get picked at */ switch (proto) { case IPPROTO_ESP: m_copydata(m, iphlen, sizeof(spi), &spi); break; case IPPROTO_AH: m_copydata(m, iphlen + sizeof(uint32_t), sizeof(spi), &spi); break; case IPPROTO_IPCOMP: m_copydata(m, iphlen + sizeof(uint16_t), sizeof(cpi), &cpi); spi = htonl(ntohs(cpi)); break; default: return (m); /* decline */ } tdb = gettdb(m->m_pkthdr.ph_rtableid, spi, dst, proto); if (tdb != NULL && !ISSET(tdb->tdb_flags, TDBF_INVALID) && tdb->tdb_xform != NULL) { if (tdb->tdb_first_use == 0) { tdb->tdb_first_use = gettime(); if (ISSET(tdb->tdb_flags, TDBF_FIRSTUSE)) { timeout_add_sec(&tdb->tdb_first_tmo, tdb->tdb_exp_first_use); } if (ISSET(tdb->tdb_flags, TDBF_SOFT_FIRSTUSE)) { timeout_add_sec(&tdb->tdb_sfirst_tmo, tdb->tdb_soft_first_use); } } (*(tdb->tdb_xform->xf_input))(m, tdb, iphlen, poff); return (NULL); } return (m); } static struct mbuf * veb_ipsec_ipv4_in(struct ifnet *ifp0, struct mbuf *m) { union sockaddr_union su = { .sin.sin_len = sizeof(su.sin), .sin.sin_family = AF_INET, }; struct ip *ip; int iphlen; if (m->m_len < sizeof(*ip)) { m = m_pullup(m, sizeof(*ip)); if (m == NULL) return (NULL); } ip = mtod(m, struct ip *); iphlen = ip->ip_hl << 2; if (iphlen < sizeof(*ip)) { /* this is a weird packet, decline */ return (m); } su.sin.sin_addr = ip->ip_dst; return (veb_ipsec_proto_in(ifp0, m, iphlen, &su, offsetof(struct ip, ip_p))); } #ifdef INET6 static struct mbuf * veb_ipsec_ipv6_in(struct ifnet *ifp0, struct mbuf *m) { union sockaddr_union su = { .sin6.sin6_len = sizeof(su.sin6), .sin6.sin6_family = AF_INET6, }; struct ip6_hdr *ip6; if (m->m_len < sizeof(*ip6)) { m = m_pullup(m, sizeof(*ip6)); if (m == NULL) return (NULL); } ip6 = mtod(m, struct ip6_hdr *); su.sin6.sin6_addr = ip6->ip6_dst; /* XXX scope? */ return (veb_ipsec_proto_in(ifp0, m, sizeof(*ip6), &su, offsetof(struct ip6_hdr, ip6_nxt))); } #endif /* INET6 */ static struct mbuf * veb_ipsec_in(struct ifnet *ifp0, struct mbuf *m) { struct mbuf *(*ipsec_ip_in)(struct ifnet *, struct mbuf *); struct ether_header *eh, copy; if (ifp0->if_enqueue == vport_enqueue) return (m); eh = mtod(m, struct ether_header *); switch (ntohs(eh->ether_type)) { case ETHERTYPE_IP: ipsec_ip_in = veb_ipsec_ipv4_in; break; #ifdef INET6 case ETHERTYPE_IPV6: ipsec_ip_in = veb_ipsec_ipv6_in; break; #endif /* INET6 */ default: return (m); } copy = *eh; m_adj(m, sizeof(*eh)); m = (*ipsec_ip_in)(ifp0, m); if (m == NULL) return (NULL); m = m_prepend(m, sizeof(*eh), M_DONTWAIT); if (m == NULL) return (NULL); eh = mtod(m, struct ether_header *); *eh = copy; return (m); } static struct mbuf * veb_ipsec_proto_out(struct mbuf *m, sa_family_t af, int iphlen) { struct tdb *tdb; int error; #if NPF > 0 struct ifnet *encifp; #endif tdb = ipsp_spd_lookup(m, af, iphlen, &error, IPSP_DIRECTION_OUT, NULL, NULL, NULL); if (tdb == NULL) return (m); #if NPF > 0 encifp = enc_getif(tdb->tdb_rdomain, tdb->tdb_tap); if (encifp != NULL) { if (pf_test(af, PF_OUT, encifp, &m) != PF_PASS) { m_freem(m); return (NULL); } if (m == NULL) return (NULL); } #endif /* NPF > 0 */ /* XXX mtu checks */ (void)ipsp_process_packet(m, tdb, af, 0); return (NULL); } static struct mbuf * veb_ipsec_ipv4_out(struct mbuf *m) { struct ip *ip; int iphlen; if (m->m_len < sizeof(*ip)) { m = m_pullup(m, sizeof(*ip)); if (m == NULL) return (NULL); } ip = mtod(m, struct ip *); iphlen = ip->ip_hl << 2; if (iphlen < sizeof(*ip)) { /* this is a weird packet, decline */ return (m); } return (veb_ipsec_proto_out(m, AF_INET, iphlen)); } #ifdef INET6 static struct mbuf * veb_ipsec_ipv6_out(struct mbuf *m) { return (veb_ipsec_proto_out(m, AF_INET6, sizeof(struct ip6_hdr))); } #endif /* INET6 */ static struct mbuf * veb_ipsec_out(struct ifnet *ifp0, struct mbuf *m) { struct mbuf *(*ipsec_ip_out)(struct mbuf *); struct ether_header *eh, copy; if (ifp0->if_enqueue == vport_enqueue) return (m); eh = mtod(m, struct ether_header *); switch (ntohs(eh->ether_type)) { case ETHERTYPE_IP: ipsec_ip_out = veb_ipsec_ipv4_out; break; #ifdef INET6 case ETHERTYPE_IPV6: ipsec_ip_out = veb_ipsec_ipv6_out; break; #endif /* INET6 */ default: return (m); } copy = *eh; m_adj(m, sizeof(*eh)); m = (*ipsec_ip_out)(m); if (m == NULL) return (NULL); m = m_prepend(m, sizeof(*eh), M_DONTWAIT); if (m == NULL) return (NULL); eh = mtod(m, struct ether_header *); *eh = copy; return (m); } #endif /* IPSEC */ static void veb_broadcast(struct veb_softc *sc, struct veb_port *rp, struct mbuf *m0, uint64_t src, uint64_t dst) { struct ifnet *ifp = &sc->sc_if; struct veb_ports *pm; struct veb_port **ps; struct veb_port *tp; struct ifnet *ifp0; struct mbuf *m; unsigned int i; #if NPF > 0 /* * we couldn't find a specific port to send this packet to, * but pf should still have a chance to apply policy to it. * let pf look at it, but use the veb interface as a proxy. */ if (ISSET(ifp->if_flags, IFF_LINK1) && (m0 = veb_pf(ifp, PF_OUT, m0)) == NULL) return; #endif #if 0 && defined(IPSEC) /* same goes for ipsec */ if (ISSET(ifp->if_flags, IFF_LINK2) && (m0 = veb_ipsec_out(ifp, m0)) == NULL) return; #endif counters_pkt(ifp->if_counters, ifc_opackets, ifc_obytes, m0->m_pkthdr.len); smr_read_enter(); pm = SMR_PTR_GET(&sc->sc_ports); if (__predict_true(pm != NULL)) refcnt_take(&pm->m_refs); smr_read_leave(); if (__predict_false(pm == NULL)) goto done; ps = veb_ports_array(pm); for (i = 0; i < pm->m_count; i++) { tp = ps[i]; if (rp == tp || (rp->p_protected & tp->p_protected)) { /* * don't let Ethernet packets hairpin or * move between ports in the same protected * domain(s). */ continue; } ifp0 = tp->p_ifp0; if (!ISSET(ifp0->if_flags, IFF_RUNNING)) { /* don't waste time */ continue; } if (!ISSET(tp->p_bif_flags, IFBIF_DISCOVER) && !ISSET(m0->m_flags, M_BCAST | M_MCAST)) { /* don't flood unknown unicast */ continue; } if (veb_rule_filter(tp, VEB_RULE_LIST_OUT, m0, src, dst)) continue; m = m_dup_pkt(m0, max_linkhdr + ETHER_ALIGN, M_NOWAIT); if (m == NULL) { /* XXX count error? */ continue; } (*tp->p_enqueue)(ifp0, m); /* XXX count error */ } refcnt_rele_wake(&pm->m_refs); done: m_freem(m0); } static struct mbuf * veb_transmit(struct veb_softc *sc, struct veb_port *rp, struct veb_port *tp, struct mbuf *m, uint64_t src, uint64_t dst) { struct ifnet *ifp = &sc->sc_if; struct ifnet *ifp0; if (tp == NULL) return (m); if (rp == tp || (rp->p_protected & tp->p_protected)) { /* * don't let Ethernet packets hairpin or move between * ports in the same protected domain(s). */ goto drop; } if (veb_rule_filter(tp, VEB_RULE_LIST_OUT, m, src, dst)) goto drop; ifp0 = tp->p_ifp0; #if 0 && defined(IPSEC) if (ISSET(ifp->if_flags, IFF_LINK2) && (m = veb_ipsec_out(ifp0, m0)) == NULL) return; #endif #if NPF > 0 if (ISSET(ifp->if_flags, IFF_LINK1) && (m = veb_pf(ifp0, PF_OUT, m)) == NULL) return (NULL); #endif counters_pkt(ifp->if_counters, ifc_opackets, ifc_obytes, m->m_pkthdr.len); (*tp->p_enqueue)(ifp0, m); /* XXX count error */ return (NULL); drop: m_freem(m); return (NULL); } static struct mbuf * veb_vport_input(struct ifnet *ifp0, struct mbuf *m, uint64_t dst, void *brport) { return (m); } static struct mbuf * veb_port_input(struct ifnet *ifp0, struct mbuf *m, uint64_t dst, void *brport) { struct veb_port *p = brport; struct veb_softc *sc = p->p_veb; struct ifnet *ifp = &sc->sc_if; struct ether_header *eh; uint64_t src; #if NBPFILTER > 0 caddr_t if_bpf; #endif if (!ISSET(ifp->if_flags, IFF_RUNNING)) return (m); eh = mtod(m, struct ether_header *); src = ether_addr_to_e64((struct ether_addr *)eh->ether_shost); /* Is this a MAC Bridge component Reserved address? */ if (ETH64_IS_8021_RSVD(dst)) { if (!ISSET(ifp->if_flags, IFF_LINK0)) { /* * letting vlans through implies this is * an s-vlan component. */ goto drop; } /* look at the last nibble of the 802.1 reserved address */ switch (dst & 0xf) { case 0x0: /* Nearest Customer Bridge Group Address */ case 0xb: /* EDE-SS PEP (IEEE Std 802.1AEcg) */ case 0xc: /* reserved */ case 0xd: /* Provider Bridge MVRP Address */ case 0xf: /* reserved */ break; default: goto drop; } } #if NVLAN > 0 /* * If the underlying interface removed the VLAN header itself, * add it back. */ if (ISSET(m->m_flags, M_VLANTAG)) { m = vlan_inject(m, ETHERTYPE_VLAN, m->m_pkthdr.ether_vtag); if (m == NULL) { counters_inc(ifp->if_counters, ifc_ierrors); goto drop; } } #endif counters_pkt(ifp->if_counters, ifc_ipackets, ifc_ibytes, m->m_pkthdr.len); /* force packets into the one routing domain for pf */ m->m_pkthdr.ph_rtableid = ifp->if_rdomain; #if NBPFILTER > 0 if_bpf = READ_ONCE(ifp->if_bpf); if (if_bpf != NULL) { if (bpf_mtap_ether(if_bpf, m, 0) != 0) goto drop; } #endif veb_span(sc, m); if (ISSET(p->p_bif_flags, IFBIF_BLOCKNONIP) && veb_ip_filter(m)) goto drop; if (!ISSET(ifp->if_flags, IFF_LINK0) && veb_vlan_filter(m)) goto drop; if (veb_rule_filter(p, VEB_RULE_LIST_IN, m, src, dst)) goto drop; #if NPF > 0 if (ISSET(ifp->if_flags, IFF_LINK1) && (m = veb_pf(ifp0, PF_IN, m)) == NULL) return (NULL); #endif #if 0 && defined(IPSEC) if (ISSET(ifp->if_flags, IFF_LINK2) && (m = veb_ipsec_in(ifp0, m)) == NULL) return (NULL); #endif eh = mtod(m, struct ether_header *); if (ISSET(p->p_bif_flags, IFBIF_LEARNING)) etherbridge_map(&sc->sc_eb, p, src); CLR(m->m_flags, M_BCAST|M_MCAST); if (!ETH64_IS_MULTICAST(dst)) { struct veb_port *tp = NULL; smr_read_enter(); tp = etherbridge_resolve(&sc->sc_eb, dst); if (tp != NULL) veb_eb_port_take(NULL, tp); smr_read_leave(); if (tp != NULL) { m = veb_transmit(sc, p, tp, m, src, dst); veb_eb_port_rele(NULL, tp); } if (m == NULL) return (NULL); /* unknown unicast address */ } else { SET(m->m_flags, ETH64_IS_BROADCAST(dst) ? M_BCAST : M_MCAST); } veb_broadcast(sc, p, m, src, dst); return (NULL); drop: m_freem(m); return (NULL); } static void veb_input(struct ifnet *ifp, struct mbuf *m) { m_freem(m); } static int veb_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rt) { m_freem(m); return (ENODEV); } static int veb_enqueue(struct ifnet *ifp, struct mbuf *m) { m_freem(m); return (ENODEV); } static void veb_start(struct ifqueue *ifq) { ifq_purge(ifq); } static int veb_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct veb_softc *sc = ifp->if_softc; struct ifbrparam *bparam = (struct ifbrparam *)data; int error = 0; if (sc->sc_dead) return (ENXIO); switch (cmd) { case SIOCSIFFLAGS: if (ISSET(ifp->if_flags, IFF_UP)) { if (!ISSET(ifp->if_flags, IFF_RUNNING)) error = veb_up(sc); } else { if (ISSET(ifp->if_flags, IFF_RUNNING)) error = veb_down(sc); } break; case SIOCBRDGADD: error = suser(curproc); if (error != 0) break; error = veb_add_port(sc, (struct ifbreq *)data, 0); break; case SIOCBRDGADDS: error = suser(curproc); if (error != 0) break; error = veb_add_port(sc, (struct ifbreq *)data, 1); break; case SIOCBRDGDEL: error = suser(curproc); if (error != 0) break; error = veb_del_port(sc, (struct ifbreq *)data, 0); break; case SIOCBRDGDELS: error = suser(curproc); if (error != 0) break; error = veb_del_port(sc, (struct ifbreq *)data, 1); break; case SIOCBRDGSCACHE: error = suser(curproc); if (error != 0) break; error = etherbridge_set_max(&sc->sc_eb, bparam); break; case SIOCBRDGGCACHE: error = etherbridge_get_max(&sc->sc_eb, bparam); break; case SIOCBRDGSTO: error = suser(curproc); if (error != 0) break; error = etherbridge_set_tmo(&sc->sc_eb, bparam); break; case SIOCBRDGGTO: error = etherbridge_get_tmo(&sc->sc_eb, bparam); break; case SIOCBRDGRTS: error = etherbridge_rtfind(&sc->sc_eb, (struct ifbaconf *)data); break; case SIOCBRDGIFS: error = veb_port_list(sc, (struct ifbifconf *)data); break; case SIOCBRDGFLUSH: etherbridge_flush(&sc->sc_eb, ((struct ifbreq *)data)->ifbr_ifsflags); break; case SIOCBRDGSADDR: error = veb_add_addr(sc, (struct ifbareq *)data); break; case SIOCBRDGDADDR: error = veb_del_addr(sc, (struct ifbareq *)data); break; case SIOCBRDGSIFPROT: error = veb_port_set_protected(sc, (struct ifbreq *)data); break; case SIOCBRDGSIFFLGS: error = veb_port_set_flags(sc, (struct ifbreq *)data); break; case SIOCBRDGGIFFLGS: error = veb_port_get_flags(sc, (struct ifbreq *)data); break; case SIOCBRDGARL: error = veb_rule_add(sc, (struct ifbrlreq *)data); break; case SIOCBRDGFRL: error = veb_rule_list_flush(sc, (struct ifbrlreq *)data); break; case SIOCBRDGGRL: error = veb_rule_list_get(sc, (struct ifbrlconf *)data); break; default: error = ENOTTY; break; } if (error == ENETRESET) error = veb_iff(sc); return (error); } static struct veb_ports * veb_ports_insert(struct veb_ports *om, struct veb_port *p) { struct veb_ports *nm; struct veb_port **nps, **ops; unsigned int ocount = om != NULL ? om->m_count : 0; unsigned int ncount = ocount + 1; unsigned int i; nm = malloc(veb_ports_size(ncount), M_DEVBUF, M_WAITOK|M_ZERO); refcnt_init(&nm->m_refs); nm->m_count = ncount; nps = veb_ports_array(nm); if (om != NULL) { ops = veb_ports_array(om); for (i = 0; i < ocount; i++) { struct veb_port *op = ops[i]; refcnt_take(&op->p_refs); nps[i] = op; } } else i = 0; refcnt_take(&p->p_refs); nps[i] = p; return (nm); } static struct veb_ports * veb_ports_remove(struct veb_ports *om, struct veb_port *p) { struct veb_ports *nm; struct veb_port **nps, **ops; unsigned int ocount = om->m_count; unsigned int ncount = ocount - 1; unsigned int i, j; if (ncount == 0) return (NULL); nm = malloc(veb_ports_size(ncount), M_DEVBUF, M_WAITOK|M_ZERO); refcnt_init(&nm->m_refs); nm->m_count = ncount; nps = veb_ports_array(nm); j = 0; ops = veb_ports_array(om); for (i = 0; i < ocount; i++) { struct veb_port *op = ops[i]; if (op == p) continue; refcnt_take(&op->p_refs); nps[j++] = op; } KASSERT(j == ncount); return (nm); } static inline void veb_ports_free(struct veb_ports *m) { free(m, M_DEVBUF, veb_ports_size(m->m_count)); } static void veb_ports_destroy(struct veb_ports *m) { struct veb_port **ps = veb_ports_array(m); unsigned int i; for (i = 0; i < m->m_count; i++) { struct veb_port *p = ps[i]; refcnt_rele_wake(&p->p_refs); } veb_ports_free(m); } static int veb_add_port(struct veb_softc *sc, const struct ifbreq *req, unsigned int span) { struct ifnet *ifp = &sc->sc_if; struct ifnet *ifp0; struct veb_ports **ports_ptr; struct veb_ports *om, *nm; struct veb_port *p; int isvport; int error; NET_ASSERT_LOCKED(); ifp0 = if_unit(req->ifbr_ifsname); if (ifp0 == NULL) return (EINVAL); if (ifp0->if_type != IFT_ETHER) { error = EPROTONOSUPPORT; goto put; } if (ifp0 == ifp) { error = EPROTONOSUPPORT; goto put; } isvport = (ifp0->if_enqueue == vport_enqueue); error = ether_brport_isset(ifp0); if (error != 0) goto put; /* let's try */ p = malloc(sizeof(*p), M_DEVBUF, M_WAITOK|M_ZERO|M_CANFAIL); if (p == NULL) { error = ENOMEM; goto put; } ifsetlro(ifp0, 0); p->p_ifp0 = ifp0; p->p_veb = sc; refcnt_init(&p->p_refs); TAILQ_INIT(&p->p_vrl); SMR_TAILQ_INIT(&p->p_vr_list[0]); SMR_TAILQ_INIT(&p->p_vr_list[1]); p->p_enqueue = isvport ? vport_if_enqueue : if_enqueue; p->p_ioctl = ifp0->if_ioctl; p->p_output = ifp0->if_output; if (span) { ports_ptr = &sc->sc_spans; if (isvport) { error = EPROTONOSUPPORT; goto free; } p->p_brport.eb_input = veb_span_input; p->p_bif_flags = IFBIF_SPAN; } else { ports_ptr = &sc->sc_ports; error = ifpromisc(ifp0, 1); if (error != 0) goto free; p->p_bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER; p->p_brport.eb_input = isvport ? veb_vport_input : veb_port_input; } p->p_brport.eb_port_take = veb_eb_brport_take; p->p_brport.eb_port_rele = veb_eb_brport_rele; om = SMR_PTR_GET_LOCKED(ports_ptr); nm = veb_ports_insert(om, p); /* this might have changed if we slept for malloc or ifpromisc */ error = ether_brport_isset(ifp0); if (error != 0) goto unpromisc; task_set(&p->p_ltask, veb_p_linkch, p); if_linkstatehook_add(ifp0, &p->p_ltask); task_set(&p->p_dtask, veb_p_detach, p); if_detachhook_add(ifp0, &p->p_dtask); p->p_brport.eb_port = p; /* commit */ SMR_PTR_SET_LOCKED(ports_ptr, nm); ether_brport_set(ifp0, &p->p_brport); if (!isvport) { /* vport is special */ ifp0->if_ioctl = veb_p_ioctl; ifp0->if_output = veb_p_output; } veb_p_linkch(p); /* clean up the old veb_ports map */ smr_barrier(); if (om != NULL) { refcnt_finalize(&om->m_refs, "vebports"); veb_ports_destroy(om); } return (0); unpromisc: if (!span) ifpromisc(ifp0, 0); free: free(p, M_DEVBUF, sizeof(*p)); put: if_put(ifp0); return (error); } static struct veb_port * veb_trunkport(struct veb_softc *sc, const char *name, unsigned int span) { struct veb_ports *m; struct veb_port **ps; struct veb_port *p; unsigned int i; m = SMR_PTR_GET_LOCKED(span ? &sc->sc_spans : &sc->sc_ports); if (m == NULL) return (NULL); ps = veb_ports_array(m); for (i = 0; i < m->m_count; i++) { p = ps[i]; if (strncmp(p->p_ifp0->if_xname, name, IFNAMSIZ) == 0) return (p); } return (NULL); } static int veb_del_port(struct veb_softc *sc, const struct ifbreq *req, unsigned int span) { struct veb_port *p; NET_ASSERT_LOCKED(); p = veb_trunkport(sc, req->ifbr_ifsname, span); if (p == NULL) return (EINVAL); veb_p_dtor(sc, p); return (0); } static struct veb_port * veb_port_get(struct veb_softc *sc, const char *name) { struct veb_ports *m; struct veb_port **ps; struct veb_port *p; unsigned int i; NET_ASSERT_LOCKED(); m = SMR_PTR_GET_LOCKED(&sc->sc_ports); if (m == NULL) return (NULL); ps = veb_ports_array(m); for (i = 0; i < m->m_count; i++) { p = ps[i]; if (strncmp(p->p_ifp0->if_xname, name, IFNAMSIZ) == 0) { refcnt_take(&p->p_refs); return (p); } } return (NULL); } static void veb_port_put(struct veb_softc *sc, struct veb_port *p) { refcnt_rele_wake(&p->p_refs); } static int veb_port_set_protected(struct veb_softc *sc, const struct ifbreq *ifbr) { struct veb_port *p; p = veb_port_get(sc, ifbr->ifbr_ifsname); if (p == NULL) return (ESRCH); p->p_protected = ifbr->ifbr_protected; veb_port_put(sc, p); return (0); } static int veb_rule_add(struct veb_softc *sc, const struct ifbrlreq *ifbr) { const struct ifbrarpf *brla = &ifbr->ifbr_arpf; struct veb_rule vr, *vrp; struct veb_port *p; int error; memset(&vr, 0, sizeof(vr)); switch (ifbr->ifbr_action) { case BRL_ACTION_BLOCK: vr.vr_action = VEB_R_BLOCK; break; case BRL_ACTION_PASS: vr.vr_action = VEB_R_PASS; break; /* XXX VEB_R_MATCH */ default: return (EINVAL); } if (!ISSET(ifbr->ifbr_flags, BRL_FLAG_IN|BRL_FLAG_OUT)) return (EINVAL); if (ISSET(ifbr->ifbr_flags, BRL_FLAG_IN)) SET(vr.vr_flags, VEB_R_F_IN); if (ISSET(ifbr->ifbr_flags, BRL_FLAG_OUT)) SET(vr.vr_flags, VEB_R_F_OUT); if (ISSET(ifbr->ifbr_flags, BRL_FLAG_SRCVALID)) { SET(vr.vr_flags, VEB_R_F_SRC); vr.vr_src = ether_addr_to_e64(&ifbr->ifbr_src); } if (ISSET(ifbr->ifbr_flags, BRL_FLAG_DSTVALID)) { SET(vr.vr_flags, VEB_R_F_DST); vr.vr_dst = ether_addr_to_e64(&ifbr->ifbr_dst); } /* ARP rule */ if (ISSET(brla->brla_flags, BRLA_ARP|BRLA_RARP)) { if (ISSET(brla->brla_flags, BRLA_ARP)) SET(vr.vr_flags, VEB_R_F_ARP); if (ISSET(brla->brla_flags, BRLA_RARP)) SET(vr.vr_flags, VEB_R_F_RARP); if (ISSET(brla->brla_flags, BRLA_SHA)) { SET(vr.vr_flags, VEB_R_F_SHA); vr.vr_arp_sha = brla->brla_sha; } if (ISSET(brla->brla_flags, BRLA_THA)) { SET(vr.vr_flags, VEB_R_F_THA); vr.vr_arp_tha = brla->brla_tha; } if (ISSET(brla->brla_flags, BRLA_SPA)) { SET(vr.vr_flags, VEB_R_F_SPA); vr.vr_arp_spa = brla->brla_spa; } if (ISSET(brla->brla_flags, BRLA_TPA)) { SET(vr.vr_flags, VEB_R_F_TPA); vr.vr_arp_tpa = brla->brla_tpa; } vr.vr_arp_op = htons(brla->brla_op); } if (ifbr->ifbr_tagname[0] != '\0') { #if NPF > 0 vr.vr_pftag = pf_tagname2tag((char *)ifbr->ifbr_tagname, 1); if (vr.vr_pftag == 0) return (ENOMEM); #else return (EINVAL); #endif } p = veb_port_get(sc, ifbr->ifbr_ifsname); if (p == NULL) { error = ESRCH; goto error; } vrp = pool_get(&veb_rule_pool, PR_WAITOK|PR_LIMITFAIL|PR_ZERO); if (vrp == NULL) { error = ENOMEM; goto port_put; } *vrp = vr; /* there's one big lock on a veb for all ports */ error = rw_enter(&sc->sc_rule_lock, RW_WRITE|RW_INTR); if (error != 0) goto rule_put; TAILQ_INSERT_TAIL(&p->p_vrl, vrp, vr_entry); p->p_nvrl++; if (ISSET(vr.vr_flags, VEB_R_F_OUT)) { SMR_TAILQ_INSERT_TAIL_LOCKED(&p->p_vr_list[0], vrp, vr_lentry[0]); } if (ISSET(vr.vr_flags, VEB_R_F_IN)) { SMR_TAILQ_INSERT_TAIL_LOCKED(&p->p_vr_list[1], vrp, vr_lentry[1]); } rw_exit(&sc->sc_rule_lock); veb_port_put(sc, p); return (0); rule_put: pool_put(&veb_rule_pool, vrp); port_put: veb_port_put(sc, p); error: #if NPF > 0 pf_tag_unref(vr.vr_pftag); #endif return (error); } static void veb_rule_list_free(struct veb_rule *nvr) { struct veb_rule *vr; while ((vr = nvr) != NULL) { nvr = TAILQ_NEXT(vr, vr_entry); pool_put(&veb_rule_pool, vr); } } static int veb_rule_list_flush(struct veb_softc *sc, const struct ifbrlreq *ifbr) { struct veb_port *p; struct veb_rule *vr; int error; p = veb_port_get(sc, ifbr->ifbr_ifsname); if (p == NULL) return (ESRCH); error = rw_enter(&sc->sc_rule_lock, RW_WRITE|RW_INTR); if (error != 0) { veb_port_put(sc, p); return (error); } /* take all the rules away */ vr = TAILQ_FIRST(&p->p_vrl); /* reset the lists and counts of rules */ TAILQ_INIT(&p->p_vrl); p->p_nvrl = 0; SMR_TAILQ_INIT(&p->p_vr_list[0]); SMR_TAILQ_INIT(&p->p_vr_list[1]); rw_exit(&sc->sc_rule_lock); veb_port_put(sc, p); smr_barrier(); veb_rule_list_free(vr); return (0); } static void veb_rule2ifbr(struct ifbrlreq *ifbr, const struct veb_rule *vr) { switch (vr->vr_action) { case VEB_R_PASS: ifbr->ifbr_action = BRL_ACTION_PASS; break; case VEB_R_BLOCK: ifbr->ifbr_action = BRL_ACTION_BLOCK; break; } if (ISSET(vr->vr_flags, VEB_R_F_IN)) SET(ifbr->ifbr_flags, BRL_FLAG_IN); if (ISSET(vr->vr_flags, VEB_R_F_OUT)) SET(ifbr->ifbr_flags, BRL_FLAG_OUT); if (ISSET(vr->vr_flags, VEB_R_F_SRC)) { SET(ifbr->ifbr_flags, BRL_FLAG_SRCVALID); ether_e64_to_addr(&ifbr->ifbr_src, vr->vr_src); } if (ISSET(vr->vr_flags, VEB_R_F_DST)) { SET(ifbr->ifbr_flags, BRL_FLAG_DSTVALID); ether_e64_to_addr(&ifbr->ifbr_dst, vr->vr_dst); } /* ARP rule */ if (ISSET(vr->vr_flags, VEB_R_F_ARP|VEB_R_F_RARP)) { struct ifbrarpf *brla = &ifbr->ifbr_arpf; if (ISSET(vr->vr_flags, VEB_R_F_ARP)) SET(brla->brla_flags, BRLA_ARP); if (ISSET(vr->vr_flags, VEB_R_F_RARP)) SET(brla->brla_flags, BRLA_RARP); if (ISSET(vr->vr_flags, VEB_R_F_SHA)) { SET(brla->brla_flags, BRLA_SHA); brla->brla_sha = vr->vr_arp_sha; } if (ISSET(vr->vr_flags, VEB_R_F_THA)) { SET(brla->brla_flags, BRLA_THA); brla->brla_tha = vr->vr_arp_tha; } if (ISSET(vr->vr_flags, VEB_R_F_SPA)) { SET(brla->brla_flags, BRLA_SPA); brla->brla_spa = vr->vr_arp_spa; } if (ISSET(vr->vr_flags, VEB_R_F_TPA)) { SET(brla->brla_flags, BRLA_TPA); brla->brla_tpa = vr->vr_arp_tpa; } brla->brla_op = ntohs(vr->vr_arp_op); } #if NPF > 0 if (vr->vr_pftag != 0) pf_tag2tagname(vr->vr_pftag, ifbr->ifbr_tagname); #endif } static int veb_rule_list_get(struct veb_softc *sc, struct ifbrlconf *ifbrl) { struct veb_port *p; struct veb_rule *vr; struct ifbrlreq *ifbr, *ifbrs; int error = 0; size_t len; p = veb_port_get(sc, ifbrl->ifbrl_ifsname); if (p == NULL) return (ESRCH); len = p->p_nvrl; /* estimate */ if (ifbrl->ifbrl_len == 0 || len == 0) { ifbrl->ifbrl_len = len * sizeof(*ifbrs); goto port_put; } error = rw_enter(&sc->sc_rule_lock, RW_READ|RW_INTR); if (error != 0) goto port_put; ifbrs = mallocarray(p->p_nvrl, sizeof(*ifbrs), M_TEMP, M_WAITOK|M_CANFAIL|M_ZERO); if (ifbrs == NULL) { rw_exit(&sc->sc_rule_lock); goto port_put; } len = p->p_nvrl * sizeof(*ifbrs); ifbr = ifbrs; TAILQ_FOREACH(vr, &p->p_vrl, vr_entry) { strlcpy(ifbr->ifbr_name, sc->sc_if.if_xname, IFNAMSIZ); strlcpy(ifbr->ifbr_ifsname, p->p_ifp0->if_xname, IFNAMSIZ); veb_rule2ifbr(ifbr, vr); ifbr++; } rw_exit(&sc->sc_rule_lock); error = copyout(ifbrs, ifbrl->ifbrl_buf, min(len, ifbrl->ifbrl_len)); if (error == 0) ifbrl->ifbrl_len = len; free(ifbrs, M_TEMP, len); port_put: veb_port_put(sc, p); return (error); } static int veb_port_list(struct veb_softc *sc, struct ifbifconf *bifc) { struct ifnet *ifp = &sc->sc_if; struct veb_ports *m; struct veb_port **ps; struct veb_port *p; struct ifnet *ifp0; struct ifbreq breq; int n = 0, error = 0; unsigned int i; NET_ASSERT_LOCKED(); if (bifc->ifbic_len == 0) { m = SMR_PTR_GET_LOCKED(&sc->sc_ports); if (m != NULL) n += m->m_count; m = SMR_PTR_GET_LOCKED(&sc->sc_spans); if (m != NULL) n += m->m_count; goto done; } m = SMR_PTR_GET_LOCKED(&sc->sc_ports); if (m != NULL) { ps = veb_ports_array(m); for (i = 0; i < m->m_count; i++) { if (bifc->ifbic_len < sizeof(breq)) break; p = ps[i]; memset(&breq, 0, sizeof(breq)); ifp0 = p->p_ifp0; strlcpy(breq.ifbr_name, ifp->if_xname, IFNAMSIZ); strlcpy(breq.ifbr_ifsname, ifp0->if_xname, IFNAMSIZ); breq.ifbr_ifsflags = p->p_bif_flags; breq.ifbr_portno = ifp0->if_index; breq.ifbr_protected = p->p_protected; if ((error = copyout(&breq, bifc->ifbic_req + n, sizeof(breq))) != 0) goto done; bifc->ifbic_len -= sizeof(breq); n++; } } m = SMR_PTR_GET_LOCKED(&sc->sc_spans); if (m != NULL) { ps = veb_ports_array(m); for (i = 0; i < m->m_count; i++) { if (bifc->ifbic_len < sizeof(breq)) break; p = ps[i]; memset(&breq, 0, sizeof(breq)); strlcpy(breq.ifbr_name, ifp->if_xname, IFNAMSIZ); strlcpy(breq.ifbr_ifsname, p->p_ifp0->if_xname, IFNAMSIZ); breq.ifbr_ifsflags = p->p_bif_flags; if ((error = copyout(&breq, bifc->ifbic_req + n, sizeof(breq))) != 0) goto done; bifc->ifbic_len -= sizeof(breq); n++; } } done: bifc->ifbic_len = n * sizeof(breq); return (error); } static int veb_port_set_flags(struct veb_softc *sc, struct ifbreq *ifbr) { struct veb_port *p; if (ISSET(ifbr->ifbr_ifsflags, ~VEB_IFBIF_FLAGS)) return (EINVAL); p = veb_port_get(sc, ifbr->ifbr_ifsname); if (p == NULL) return (ESRCH); p->p_bif_flags = ifbr->ifbr_ifsflags; veb_port_put(sc, p); return (0); } static int veb_port_get_flags(struct veb_softc *sc, struct ifbreq *ifbr) { struct veb_port *p; p = veb_port_get(sc, ifbr->ifbr_ifsname); if (p == NULL) return (ESRCH); ifbr->ifbr_ifsflags = p->p_bif_flags; ifbr->ifbr_portno = p->p_ifp0->if_index; ifbr->ifbr_protected = p->p_protected; veb_port_put(sc, p); return (0); } static int veb_add_addr(struct veb_softc *sc, const struct ifbareq *ifba) { struct veb_port *p; int error = 0; unsigned int type; if (ISSET(ifba->ifba_flags, ~IFBAF_TYPEMASK)) return (EINVAL); switch (ifba->ifba_flags & IFBAF_TYPEMASK) { case IFBAF_DYNAMIC: type = EBE_DYNAMIC; break; case IFBAF_STATIC: type = EBE_STATIC; break; default: return (EINVAL); } if (ifba->ifba_dstsa.ss_family != AF_UNSPEC) return (EAFNOSUPPORT); p = veb_port_get(sc, ifba->ifba_ifsname); if (p == NULL) return (ESRCH); error = etherbridge_add_addr(&sc->sc_eb, p, &ifba->ifba_dst, type); veb_port_put(sc, p); return (error); } static int veb_del_addr(struct veb_softc *sc, const struct ifbareq *ifba) { return (etherbridge_del_addr(&sc->sc_eb, &ifba->ifba_dst)); } static int veb_p_ioctl(struct ifnet *ifp0, u_long cmd, caddr_t data) { const struct ether_brport *eb = ether_brport_get_locked(ifp0); struct veb_port *p; int error = 0; KASSERTMSG(eb != NULL, "%s: %s called without an ether_brport set", ifp0->if_xname, __func__); KASSERTMSG((eb->eb_input == veb_port_input) || (eb->eb_input == veb_span_input), "%s called %s, but eb_input (%p) seems wrong", ifp0->if_xname, __func__, eb->eb_input); p = eb->eb_port; switch (cmd) { case SIOCSIFADDR: error = EBUSY; break; default: error = (*p->p_ioctl)(ifp0, cmd, data); break; } return (error); } static int veb_p_output(struct ifnet *ifp0, struct mbuf *m, struct sockaddr *dst, struct rtentry *rt) { int (*p_output)(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *) = NULL; const struct ether_brport *eb; /* restrict transmission to bpf only */ if ((m_tag_find(m, PACKET_TAG_DLT, NULL) == NULL)) { m_freem(m); return (EBUSY); } smr_read_enter(); eb = ether_brport_get(ifp0); if (eb != NULL && eb->eb_input == veb_port_input) { struct veb_port *p = eb->eb_port; p_output = p->p_output; /* code doesn't go away */ } smr_read_leave(); if (p_output == NULL) { m_freem(m); return (ENXIO); } return ((*p_output)(ifp0, m, dst, rt)); } /* * there must be an smr_barrier after ether_brport_clr() and before * veb_port is freed in veb_p_fini() */ static void veb_p_unlink(struct veb_softc *sc, struct veb_port *p) { struct ifnet *ifp = &sc->sc_if; struct ifnet *ifp0 = p->p_ifp0; ifp0->if_ioctl = p->p_ioctl; ifp0->if_output = p->p_output; ether_brport_clr(ifp0); /* needs an smr_barrier */ if_detachhook_del(ifp0, &p->p_dtask); if_linkstatehook_del(ifp0, &p->p_ltask); if (!ISSET(p->p_bif_flags, IFBIF_SPAN)) { if (ifpromisc(ifp0, 0) != 0) { log(LOG_WARNING, "%s %s: unable to disable promisc\n", ifp->if_xname, ifp0->if_xname); } etherbridge_detach_port(&sc->sc_eb, p); } } static void veb_p_fini(struct veb_port *p) { struct ifnet *ifp0 = p->p_ifp0; refcnt_finalize(&p->p_refs, "vebpdtor"); veb_rule_list_free(TAILQ_FIRST(&p->p_vrl)); if_put(ifp0); free(p, M_DEVBUF, sizeof(*p)); /* hope you didn't forget smr_barrier */ } static void veb_p_dtor(struct veb_softc *sc, struct veb_port *p) { struct veb_ports **ports_ptr; struct veb_ports *om, *nm; ports_ptr = ISSET(p->p_bif_flags, IFBIF_SPAN) ? &sc->sc_spans : &sc->sc_ports; om = SMR_PTR_GET_LOCKED(ports_ptr); nm = veb_ports_remove(om, p); SMR_PTR_SET_LOCKED(ports_ptr, nm); veb_p_unlink(sc, p); smr_barrier(); refcnt_finalize(&om->m_refs, "vebports"); veb_ports_destroy(om); veb_p_fini(p); } static void veb_p_detach(void *arg) { struct veb_port *p = arg; struct veb_softc *sc = p->p_veb; NET_ASSERT_LOCKED(); veb_p_dtor(sc, p); } static int veb_p_active(struct veb_port *p) { struct ifnet *ifp0 = p->p_ifp0; return (ISSET(ifp0->if_flags, IFF_RUNNING) && LINK_STATE_IS_UP(ifp0->if_link_state)); } static void veb_p_linkch(void *arg) { struct veb_port *p = arg; u_char link_state = LINK_STATE_FULL_DUPLEX; NET_ASSERT_LOCKED(); if (!veb_p_active(p)) link_state = LINK_STATE_DOWN; p->p_link_state = link_state; } static int veb_up(struct veb_softc *sc) { struct ifnet *ifp = &sc->sc_if; int error; error = etherbridge_up(&sc->sc_eb); if (error != 0) return (error); NET_ASSERT_LOCKED(); SET(ifp->if_flags, IFF_RUNNING); return (0); } static int veb_iff(struct veb_softc *sc) { return (0); } static int veb_down(struct veb_softc *sc) { struct ifnet *ifp = &sc->sc_if; int error; error = etherbridge_down(&sc->sc_eb); if (error != 0) return (0); NET_ASSERT_LOCKED(); CLR(ifp->if_flags, IFF_RUNNING); return (0); } static int veb_eb_port_cmp(void *arg, void *a, void *b) { struct veb_port *pa = a, *pb = b; return (pa == pb); } static void * veb_eb_port_take(void *arg, void *port) { struct veb_port *p = port; refcnt_take(&p->p_refs); return (p); } static void veb_eb_port_rele(void *arg, void *port) { struct veb_port *p = port; refcnt_rele_wake(&p->p_refs); } static void veb_eb_brport_take(void *port) { veb_eb_port_take(NULL, port); } static void veb_eb_brport_rele(void *port) { veb_eb_port_rele(NULL, port); } static size_t veb_eb_port_ifname(void *arg, char *dst, size_t len, void *port) { struct veb_port *p = port; return (strlcpy(dst, p->p_ifp0->if_xname, len)); } static void veb_eb_port_sa(void *arg, struct sockaddr_storage *ss, void *port) { ss->ss_family = AF_UNSPEC; } /* * virtual ethernet bridge port */ static int vport_clone_create(struct if_clone *ifc, int unit) { struct vport_softc *sc; struct ifnet *ifp; sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO|M_CANFAIL); if (sc == NULL) return (ENOMEM); ifp = &sc->sc_ac.ac_if; snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", ifc->ifc_name, unit); ifp->if_softc = sc; ifp->if_type = IFT_ETHER; ifp->if_hardmtu = ETHER_MAX_HARDMTU_LEN; ifp->if_ioctl = vport_ioctl; ifp->if_enqueue = vport_enqueue; ifp->if_qstart = vport_start; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_xflags = IFXF_CLONED | IFXF_MPSAFE; ether_fakeaddr(ifp); if_counters_alloc(ifp); if_attach(ifp); ether_ifattach(ifp); return (0); } static int vport_clone_destroy(struct ifnet *ifp) { struct vport_softc *sc = ifp->if_softc; NET_LOCK(); sc->sc_dead = 1; if (ISSET(ifp->if_flags, IFF_RUNNING)) vport_down(sc); NET_UNLOCK(); ether_ifdetach(ifp); if_detach(ifp); free(sc, M_DEVBUF, sizeof(*sc)); return (0); } static int vport_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct vport_softc *sc = ifp->if_softc; int error = 0; if (sc->sc_dead) return (ENXIO); switch (cmd) { case SIOCSIFFLAGS: if (ISSET(ifp->if_flags, IFF_UP)) { if (!ISSET(ifp->if_flags, IFF_RUNNING)) error = vport_up(sc); } else { if (ISSET(ifp->if_flags, IFF_RUNNING)) error = vport_down(sc); } break; case SIOCADDMULTI: case SIOCDELMULTI: break; default: error = ether_ioctl(ifp, &sc->sc_ac, cmd, data); break; } if (error == ENETRESET) error = vport_iff(sc); return (error); } static int vport_up(struct vport_softc *sc) { struct ifnet *ifp = &sc->sc_ac.ac_if; NET_ASSERT_LOCKED(); SET(ifp->if_flags, IFF_RUNNING); return (0); } static int vport_iff(struct vport_softc *sc) { return (0); } static int vport_down(struct vport_softc *sc) { struct ifnet *ifp = &sc->sc_ac.ac_if; NET_ASSERT_LOCKED(); CLR(ifp->if_flags, IFF_RUNNING); return (0); } static int vport_if_enqueue(struct ifnet *ifp, struct mbuf *m) { /* * switching an l2 packet toward a vport means pushing it * into the network stack. this function exists to make * if_vinput compat with veb calling if_enqueue. */ if_vinput(ifp, m); return (0); } static int vport_enqueue(struct ifnet *ifp, struct mbuf *m) { struct arpcom *ac; const struct ether_brport *eb; int error = ENETDOWN; #if NBPFILTER > 0 caddr_t if_bpf; #endif /* * a packet sent from the l3 stack out a vport goes into * veb for switching out another port. */ #if NPF > 0 /* * there's no relationship between pf states in the l3 stack * and the l2 bridge. */ pf_pkt_addr_changed(m); #endif ac = (struct arpcom *)ifp; smr_read_enter(); eb = SMR_PTR_GET(&ac->ac_brport); if (eb != NULL) eb->eb_port_take(eb->eb_port); smr_read_leave(); if (eb != NULL) { struct mbuf *(*input)(struct ifnet *, struct mbuf *, uint64_t, void *) = eb->eb_input; struct ether_header *eh; uint64_t dst; counters_pkt(ifp->if_counters, ifc_opackets, ifc_obytes, m->m_pkthdr.len); #if NBPFILTER > 0 if_bpf = READ_ONCE(ifp->if_bpf); if (if_bpf != NULL) bpf_mtap_ether(if_bpf, m, BPF_DIRECTION_OUT); #endif eh = mtod(m, struct ether_header *); dst = ether_addr_to_e64((struct ether_addr *)eh->ether_dhost); if (input == veb_vport_input) input = veb_port_input; m = (*input)(ifp, m, dst, eb->eb_port); error = 0; eb->eb_port_rele(eb->eb_port); } m_freem(m); return (error); } static void vport_start(struct ifqueue *ifq) { ifq_purge(ifq); }