f188f14d43
the functions' calls match their definitions. Move them to header files. Reviewed by: jilles (previous version)
1090 lines
25 KiB
C
1090 lines
25 KiB
C
/*-
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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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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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $KAME: if_gif.c,v 1.87 2001/10/19 08:50:27 itojun 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/systm.h>
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#include <sys/jail.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/rmlock.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sx.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/conf.h>
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#include <machine/cpu.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_clone.h>
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#include <net/if_types.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <net/bpf.h>
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#include <net/vnet.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_ecn.h>
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#ifdef INET
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#include <netinet/in_var.h>
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#include <netinet/ip_var.h>
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#endif /* INET */
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#ifdef INET6
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#ifndef INET
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#include <netinet/in.h>
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#endif
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#include <netinet6/in6_var.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_ecn.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/scope6_var.h>
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#include <netinet6/ip6protosw.h>
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#endif /* INET6 */
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#include <netinet/ip_encap.h>
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#include <net/ethernet.h>
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#include <net/if_bridgevar.h>
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#include <net/if_gif.h>
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#include <security/mac/mac_framework.h>
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static const char gifname[] = "gif";
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/*
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* gif_mtx protects a per-vnet gif_softc_list.
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*/
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static VNET_DEFINE(struct mtx, gif_mtx);
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#define V_gif_mtx VNET(gif_mtx)
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static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
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static VNET_DEFINE(LIST_HEAD(, gif_softc), gif_softc_list);
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#define V_gif_softc_list VNET(gif_softc_list)
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static struct sx gif_ioctl_sx;
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SX_SYSINIT(gif_ioctl_sx, &gif_ioctl_sx, "gif_ioctl");
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#define GIF_LIST_LOCK_INIT(x) mtx_init(&V_gif_mtx, "gif_mtx", \
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NULL, MTX_DEF)
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#define GIF_LIST_LOCK_DESTROY(x) mtx_destroy(&V_gif_mtx)
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#define GIF_LIST_LOCK(x) mtx_lock(&V_gif_mtx)
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#define GIF_LIST_UNLOCK(x) mtx_unlock(&V_gif_mtx)
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void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af);
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void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af);
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void (*ng_gif_attach_p)(struct ifnet *ifp);
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void (*ng_gif_detach_p)(struct ifnet *ifp);
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static int gif_set_tunnel(struct ifnet *, struct sockaddr *,
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struct sockaddr *);
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static void gif_delete_tunnel(struct ifnet *);
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static int gif_ioctl(struct ifnet *, u_long, caddr_t);
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static int gif_transmit(struct ifnet *, struct mbuf *);
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static void gif_qflush(struct ifnet *);
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static int gif_clone_create(struct if_clone *, int, caddr_t);
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static void gif_clone_destroy(struct ifnet *);
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static VNET_DEFINE(struct if_clone *, gif_cloner);
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#define V_gif_cloner VNET(gif_cloner)
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static int gifmodevent(module_t, int, void *);
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SYSCTL_DECL(_net_link);
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static SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0,
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"Generic Tunnel Interface");
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#ifndef MAX_GIF_NEST
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/*
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* This macro controls the default upper limitation on nesting of gif tunnels.
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* Since, setting a large value to this macro with a careless configuration
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* may introduce system crash, we don't allow any nestings by default.
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* If you need to configure nested gif tunnels, you can define this macro
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* in your kernel configuration file. However, if you do so, please be
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* careful to configure the tunnels so that it won't make a loop.
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*/
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#define MAX_GIF_NEST 1
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#endif
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static VNET_DEFINE(int, max_gif_nesting) = MAX_GIF_NEST;
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#define V_max_gif_nesting VNET(max_gif_nesting)
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SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_VNET | CTLFLAG_RW,
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&VNET_NAME(max_gif_nesting), 0, "Max nested tunnels");
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/*
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* By default, we disallow creation of multiple tunnels between the same
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* pair of addresses. Some applications require this functionality so
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* we allow control over this check here.
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*/
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#ifdef XBONEHACK
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static VNET_DEFINE(int, parallel_tunnels) = 1;
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#else
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static VNET_DEFINE(int, parallel_tunnels) = 0;
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#endif
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#define V_parallel_tunnels VNET(parallel_tunnels)
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SYSCTL_INT(_net_link_gif, OID_AUTO, parallel_tunnels,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(parallel_tunnels), 0,
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"Allow parallel tunnels?");
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/* copy from src/sys/net/if_ethersubr.c */
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static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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#ifndef ETHER_IS_BROADCAST
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#define ETHER_IS_BROADCAST(addr) \
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(bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0)
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#endif
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static int
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gif_clone_create(struct if_clone *ifc, int unit, caddr_t params)
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{
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struct gif_softc *sc;
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sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO);
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sc->gif_fibnum = curthread->td_proc->p_fibnum;
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GIF2IFP(sc) = if_alloc(IFT_GIF);
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GIF_LOCK_INIT(sc);
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GIF2IFP(sc)->if_softc = sc;
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if_initname(GIF2IFP(sc), gifname, unit);
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GIF2IFP(sc)->if_addrlen = 0;
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GIF2IFP(sc)->if_mtu = GIF_MTU;
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GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
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#if 0
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/* turn off ingress filter */
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GIF2IFP(sc)->if_flags |= IFF_LINK2;
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#endif
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GIF2IFP(sc)->if_ioctl = gif_ioctl;
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GIF2IFP(sc)->if_transmit = gif_transmit;
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GIF2IFP(sc)->if_qflush = gif_qflush;
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GIF2IFP(sc)->if_output = gif_output;
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if_attach(GIF2IFP(sc));
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bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
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if (ng_gif_attach_p != NULL)
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(*ng_gif_attach_p)(GIF2IFP(sc));
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GIF_LIST_LOCK();
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LIST_INSERT_HEAD(&V_gif_softc_list, sc, gif_list);
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GIF_LIST_UNLOCK();
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return (0);
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}
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static void
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gif_clone_destroy(struct ifnet *ifp)
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{
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struct gif_softc *sc;
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sx_xlock(&gif_ioctl_sx);
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sc = ifp->if_softc;
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gif_delete_tunnel(ifp);
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GIF_LIST_LOCK();
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LIST_REMOVE(sc, gif_list);
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GIF_LIST_UNLOCK();
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if (ng_gif_detach_p != NULL)
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(*ng_gif_detach_p)(ifp);
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bpfdetach(ifp);
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if_detach(ifp);
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ifp->if_softc = NULL;
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sx_xunlock(&gif_ioctl_sx);
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if_free(ifp);
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GIF_LOCK_DESTROY(sc);
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free(sc, M_GIF);
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}
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static void
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vnet_gif_init(const void *unused __unused)
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{
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LIST_INIT(&V_gif_softc_list);
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GIF_LIST_LOCK_INIT();
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V_gif_cloner = if_clone_simple(gifname, gif_clone_create,
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gif_clone_destroy, 0);
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}
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VNET_SYSINIT(vnet_gif_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
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vnet_gif_init, NULL);
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static void
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vnet_gif_uninit(const void *unused __unused)
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{
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if_clone_detach(V_gif_cloner);
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GIF_LIST_LOCK_DESTROY();
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}
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VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
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vnet_gif_uninit, NULL);
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static int
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gifmodevent(module_t mod, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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case MOD_UNLOAD:
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break;
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default:
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return (EOPNOTSUPP);
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}
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return (0);
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}
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static moduledata_t gif_mod = {
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"if_gif",
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gifmodevent,
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0
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};
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DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
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MODULE_VERSION(if_gif, 1);
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int
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gif_encapcheck(const struct mbuf *m, int off, int proto, void *arg)
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{
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GIF_RLOCK_TRACKER;
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struct gif_softc *sc;
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int ret;
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uint8_t ver;
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sc = (struct gif_softc *)arg;
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if (sc == NULL || (GIF2IFP(sc)->if_flags & IFF_UP) == 0)
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return (0);
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ret = 0;
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GIF_RLOCK(sc);
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/* no physical address */
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if (sc->gif_family == 0)
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goto done;
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switch (proto) {
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#ifdef INET
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case IPPROTO_IPV4:
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#endif
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#ifdef INET6
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case IPPROTO_IPV6:
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#endif
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case IPPROTO_ETHERIP:
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break;
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default:
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goto done;
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}
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/* Bail on short packets */
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if (m->m_pkthdr.len < sizeof(struct ip))
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goto done;
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m_copydata(m, 0, 1, &ver);
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switch (ver >> 4) {
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#ifdef INET
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case 4:
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if (sc->gif_family != AF_INET)
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goto done;
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ret = in_gif_encapcheck(m, off, proto, arg);
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break;
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#endif
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#ifdef INET6
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case 6:
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if (m->m_pkthdr.len < sizeof(struct ip6_hdr))
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goto done;
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if (sc->gif_family != AF_INET6)
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goto done;
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ret = in6_gif_encapcheck(m, off, proto, arg);
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break;
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#endif
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}
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done:
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GIF_RUNLOCK(sc);
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return (ret);
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}
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static int
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gif_transmit(struct ifnet *ifp, struct mbuf *m)
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{
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struct gif_softc *sc;
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struct etherip_header *eth;
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#ifdef INET
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struct ip *ip;
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#endif
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#ifdef INET6
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struct ip6_hdr *ip6;
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uint32_t t;
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#endif
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uint32_t af;
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uint8_t proto, ecn;
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int error;
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error = ENETDOWN;
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sc = ifp->if_softc;
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if (sc->gif_family == 0) {
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m_freem(m);
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goto err;
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}
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/* Now pull back the af that we stashed in the csum_data. */
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af = m->m_pkthdr.csum_data;
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BPF_MTAP2(ifp, &af, sizeof(af), m);
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if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
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if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
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M_SETFIB(m, sc->gif_fibnum);
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/* inner AF-specific encapsulation */
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ecn = 0;
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switch (af) {
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#ifdef INET
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case AF_INET:
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proto = IPPROTO_IPV4;
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if (m->m_len < sizeof(struct ip))
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m = m_pullup(m, sizeof(struct ip));
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if (m == NULL) {
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error = ENOBUFS;
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goto err;
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}
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ip = mtod(m, struct ip *);
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ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
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ECN_NOCARE, &ecn, &ip->ip_tos);
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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proto = IPPROTO_IPV6;
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if (m->m_len < sizeof(struct ip6_hdr))
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m = m_pullup(m, sizeof(struct ip6_hdr));
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if (m == NULL) {
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error = ENOBUFS;
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goto err;
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}
|
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t = 0;
|
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ip6 = mtod(m, struct ip6_hdr *);
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ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
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ECN_NOCARE, &t, &ip6->ip6_flow);
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ecn = (ntohl(t) >> 20) & 0xff;
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break;
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#endif
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case AF_LINK:
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proto = IPPROTO_ETHERIP;
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M_PREPEND(m, sizeof(struct etherip_header), M_NOWAIT);
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if (m == NULL) {
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error = ENOBUFS;
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goto err;
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}
|
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eth = mtod(m, struct etherip_header *);
|
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eth->eip_resvh = 0;
|
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if ((sc->gif_options & GIF_SEND_REVETHIP) != 0) {
|
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eth->eip_ver = 0;
|
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eth->eip_resvl = ETHERIP_VERSION;
|
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} else {
|
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eth->eip_ver = ETHERIP_VERSION;
|
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eth->eip_resvl = 0;
|
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}
|
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break;
|
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default:
|
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error = EAFNOSUPPORT;
|
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m_freem(m);
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goto err;
|
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}
|
|
/* XXX should we check if our outer source is legal? */
|
|
/* dispatch to output logic based on outer AF */
|
|
switch (sc->gif_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
error = in_gif_output(ifp, m, proto, ecn);
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break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
error = in6_gif_output(ifp, m, proto, ecn);
|
|
break;
|
|
#endif
|
|
default:
|
|
m_freem(m);
|
|
}
|
|
err:
|
|
if (error)
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
gif_qflush(struct ifnet *ifp __unused)
|
|
{
|
|
|
|
}
|
|
|
|
int
|
|
gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
|
|
struct route *ro)
|
|
{
|
|
struct m_tag *mtag;
|
|
uint32_t af;
|
|
int gif_called;
|
|
int error = 0;
|
|
#ifdef MAC
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|
error = mac_ifnet_check_transmit(ifp, m);
|
|
if (error)
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|
goto err;
|
|
#endif
|
|
if ((ifp->if_flags & IFF_MONITOR) != 0 ||
|
|
(ifp->if_flags & IFF_UP) == 0) {
|
|
error = ENETDOWN;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* gif may cause infinite recursion calls when misconfigured.
|
|
* We'll prevent this by detecting loops.
|
|
*
|
|
* High nesting level may cause stack exhaustion.
|
|
* We'll prevent this by introducing upper limit.
|
|
*/
|
|
gif_called = 1;
|
|
mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, NULL);
|
|
while (mtag != NULL) {
|
|
if (*(struct ifnet **)(mtag + 1) == ifp) {
|
|
log(LOG_NOTICE,
|
|
"gif_output: loop detected on %s\n",
|
|
(*(struct ifnet **)(mtag + 1))->if_xname);
|
|
error = EIO; /* is there better errno? */
|
|
goto err;
|
|
}
|
|
mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, mtag);
|
|
gif_called++;
|
|
}
|
|
if (gif_called > V_max_gif_nesting) {
|
|
log(LOG_NOTICE,
|
|
"gif_output: recursively called too many times(%d)\n",
|
|
gif_called);
|
|
error = EIO; /* is there better errno? */
|
|
goto err;
|
|
}
|
|
mtag = m_tag_alloc(MTAG_GIF, MTAG_GIF_CALLED, sizeof(struct ifnet *),
|
|
M_NOWAIT);
|
|
if (mtag == NULL) {
|
|
error = ENOMEM;
|
|
goto err;
|
|
}
|
|
*(struct ifnet **)(mtag + 1) = ifp;
|
|
m_tag_prepend(m, mtag);
|
|
|
|
m->m_flags &= ~(M_BCAST|M_MCAST);
|
|
if (dst->sa_family == AF_UNSPEC)
|
|
bcopy(dst->sa_data, &af, sizeof(af));
|
|
else
|
|
af = dst->sa_family;
|
|
if (ifp->if_bridge)
|
|
af = AF_LINK;
|
|
/*
|
|
* Now save the af in the inbound pkt csum data, this is a cheat since
|
|
* we are using the inbound csum_data field to carry the af over to
|
|
* the gif_transmit() routine, avoiding using yet another mtag.
|
|
*/
|
|
m->m_pkthdr.csum_data = af;
|
|
return (ifp->if_transmit(ifp, m));
|
|
err:
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
|
|
{
|
|
struct etherip_header *eip;
|
|
#ifdef INET
|
|
struct ip *ip;
|
|
#endif
|
|
#ifdef INET6
|
|
struct ip6_hdr *ip6;
|
|
uint32_t t;
|
|
#endif
|
|
struct gif_softc *sc;
|
|
struct ether_header *eh;
|
|
struct ifnet *oldifp;
|
|
uint32_t gif_options;
|
|
int isr, n, af;
|
|
|
|
if (ifp == NULL) {
|
|
/* just in case */
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
sc = ifp->if_softc;
|
|
gif_options = sc->gif_options;
|
|
m->m_pkthdr.rcvif = ifp;
|
|
m_clrprotoflags(m);
|
|
switch (proto) {
|
|
#ifdef INET
|
|
case IPPROTO_IPV4:
|
|
af = AF_INET;
|
|
if (m->m_len < sizeof(struct ip))
|
|
m = m_pullup(m, sizeof(struct ip));
|
|
if (m == NULL)
|
|
goto drop;
|
|
ip = mtod(m, struct ip *);
|
|
if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
|
|
ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
|
|
m_freem(m);
|
|
goto drop;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case IPPROTO_IPV6:
|
|
af = AF_INET6;
|
|
if (m->m_len < sizeof(struct ip6_hdr))
|
|
m = m_pullup(m, sizeof(struct ip6_hdr));
|
|
if (m == NULL)
|
|
goto drop;
|
|
t = htonl((uint32_t)ecn << 20);
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
|
|
ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
|
|
m_freem(m);
|
|
goto drop;
|
|
}
|
|
break;
|
|
#endif
|
|
case IPPROTO_ETHERIP:
|
|
af = AF_LINK;
|
|
break;
|
|
default:
|
|
m_freem(m);
|
|
goto drop;
|
|
}
|
|
|
|
#ifdef MAC
|
|
mac_ifnet_create_mbuf(ifp, m);
|
|
#endif
|
|
|
|
if (bpf_peers_present(ifp->if_bpf)) {
|
|
uint32_t af1 = af;
|
|
bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
|
|
}
|
|
|
|
if ((ifp->if_flags & IFF_MONITOR) != 0) {
|
|
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
|
|
if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if (ng_gif_input_p != NULL) {
|
|
(*ng_gif_input_p)(ifp, &m, af);
|
|
if (m == NULL)
|
|
goto drop;
|
|
}
|
|
|
|
/*
|
|
* Put the packet to the network layer input queue according to the
|
|
* specified address family.
|
|
* Note: older versions of gif_input directly called network layer
|
|
* input functions, e.g. ip6_input, here. We changed the policy to
|
|
* prevent too many recursive calls of such input functions, which
|
|
* might cause kernel panic. But the change may introduce another
|
|
* problem; if the input queue is full, packets are discarded.
|
|
* The kernel stack overflow really happened, and we believed
|
|
* queue-full rarely occurs, so we changed the policy.
|
|
*/
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
isr = NETISR_IP;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
isr = NETISR_IPV6;
|
|
break;
|
|
#endif
|
|
case AF_LINK:
|
|
n = sizeof(struct etherip_header) + sizeof(struct ether_header);
|
|
if (n > m->m_len)
|
|
m = m_pullup(m, n);
|
|
if (m == NULL)
|
|
goto drop;
|
|
eip = mtod(m, struct etherip_header *);
|
|
/*
|
|
* GIF_ACCEPT_REVETHIP (enabled by default) intentionally
|
|
* accepts an EtherIP packet with revered version field in
|
|
* the header. This is a knob for backward compatibility
|
|
* with FreeBSD 7.2R or prior.
|
|
*/
|
|
if (eip->eip_ver != ETHERIP_VERSION) {
|
|
if ((gif_options & GIF_ACCEPT_REVETHIP) == 0 ||
|
|
eip->eip_resvl != ETHERIP_VERSION) {
|
|
/* discard unknown versions */
|
|
m_freem(m);
|
|
goto drop;
|
|
}
|
|
}
|
|
m_adj(m, sizeof(struct etherip_header));
|
|
|
|
m->m_flags &= ~(M_BCAST|M_MCAST);
|
|
m->m_pkthdr.rcvif = ifp;
|
|
|
|
if (ifp->if_bridge) {
|
|
oldifp = ifp;
|
|
eh = mtod(m, struct ether_header *);
|
|
if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
|
|
if (ETHER_IS_BROADCAST(eh->ether_dhost))
|
|
m->m_flags |= M_BCAST;
|
|
else
|
|
m->m_flags |= M_MCAST;
|
|
if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
|
|
}
|
|
BRIDGE_INPUT(ifp, m);
|
|
|
|
if (m != NULL && ifp != oldifp) {
|
|
/*
|
|
* The bridge gave us back itself or one of the
|
|
* members for which the frame is addressed.
|
|
*/
|
|
ether_demux(ifp, m);
|
|
return;
|
|
}
|
|
}
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
return;
|
|
|
|
default:
|
|
if (ng_gif_input_orphan_p != NULL)
|
|
(*ng_gif_input_orphan_p)(ifp, m, af);
|
|
else
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
|
|
if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
|
|
M_SETFIB(m, ifp->if_fib);
|
|
netisr_dispatch(isr, m);
|
|
return;
|
|
drop:
|
|
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
|
|
}
|
|
|
|
/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
|
|
int
|
|
gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
GIF_RLOCK_TRACKER;
|
|
struct ifreq *ifr = (struct ifreq*)data;
|
|
struct sockaddr *dst, *src;
|
|
struct gif_softc *sc;
|
|
#ifdef INET
|
|
struct sockaddr_in *sin = NULL;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6 = NULL;
|
|
#endif
|
|
u_int options;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
case SIOCGIFMTU:
|
|
case SIOCSIFFLAGS:
|
|
return (0);
|
|
case SIOCSIFMTU:
|
|
if (ifr->ifr_mtu < GIF_MTU_MIN ||
|
|
ifr->ifr_mtu > GIF_MTU_MAX)
|
|
return (EINVAL);
|
|
else
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
return (0);
|
|
}
|
|
sx_xlock(&gif_ioctl_sx);
|
|
sc = ifp->if_softc;
|
|
if (sc == NULL) {
|
|
error = ENXIO;
|
|
goto bad;
|
|
}
|
|
error = 0;
|
|
switch (cmd) {
|
|
case SIOCSIFPHYADDR:
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
#endif
|
|
error = EINVAL;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCSIFPHYADDR:
|
|
src = (struct sockaddr *)
|
|
&(((struct in_aliasreq *)data)->ifra_addr);
|
|
dst = (struct sockaddr *)
|
|
&(((struct in_aliasreq *)data)->ifra_dstaddr);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
src = (struct sockaddr *)
|
|
&(((struct in6_aliasreq *)data)->ifra_addr);
|
|
dst = (struct sockaddr *)
|
|
&(((struct in6_aliasreq *)data)->ifra_dstaddr);
|
|
break;
|
|
#endif
|
|
default:
|
|
goto bad;
|
|
}
|
|
/* sa_family must be equal */
|
|
if (src->sa_family != dst->sa_family ||
|
|
src->sa_len != dst->sa_len)
|
|
goto bad;
|
|
|
|
/* validate sa_len */
|
|
switch (src->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (src->sa_len != sizeof(struct sockaddr_in))
|
|
goto bad;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (src->sa_len != sizeof(struct sockaddr_in6))
|
|
goto bad;
|
|
break;
|
|
#endif
|
|
default:
|
|
error = EAFNOSUPPORT;
|
|
goto bad;
|
|
}
|
|
/* check sa_family looks sane for the cmd */
|
|
error = EAFNOSUPPORT;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCSIFPHYADDR:
|
|
if (src->sa_family == AF_INET)
|
|
break;
|
|
goto bad;
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
if (src->sa_family == AF_INET6)
|
|
break;
|
|
goto bad;
|
|
#endif
|
|
}
|
|
error = EADDRNOTAVAIL;
|
|
switch (src->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (satosin(src)->sin_addr.s_addr == INADDR_ANY ||
|
|
satosin(dst)->sin_addr.s_addr == INADDR_ANY)
|
|
goto bad;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(src)->sin6_addr)
|
|
||
|
|
IN6_IS_ADDR_UNSPECIFIED(&satosin6(dst)->sin6_addr))
|
|
goto bad;
|
|
/*
|
|
* Check validity of the scope zone ID of the
|
|
* addresses, and convert it into the kernel
|
|
* internal form if necessary.
|
|
*/
|
|
error = sa6_embedscope(satosin6(src), 0);
|
|
if (error != 0)
|
|
goto bad;
|
|
error = sa6_embedscope(satosin6(dst), 0);
|
|
if (error != 0)
|
|
goto bad;
|
|
#endif
|
|
};
|
|
error = gif_set_tunnel(ifp, src, dst);
|
|
break;
|
|
case SIOCDIFPHYADDR:
|
|
gif_delete_tunnel(ifp);
|
|
break;
|
|
case SIOCGIFPSRCADDR:
|
|
case SIOCGIFPDSTADDR:
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
#endif
|
|
if (sc->gif_family == 0) {
|
|
error = EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
GIF_RLOCK(sc);
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCGIFPSRCADDR:
|
|
case SIOCGIFPDSTADDR:
|
|
if (sc->gif_family != AF_INET) {
|
|
error = EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
sin = (struct sockaddr_in *)&ifr->ifr_addr;
|
|
memset(sin, 0, sizeof(*sin));
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_len = sizeof(*sin);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
if (sc->gif_family != AF_INET6) {
|
|
error = EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
sin6 = (struct sockaddr_in6 *)
|
|
&(((struct in6_ifreq *)data)->ifr_addr);
|
|
memset(sin6, 0, sizeof(*sin6));
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(*sin6);
|
|
break;
|
|
#endif
|
|
default:
|
|
error = EAFNOSUPPORT;
|
|
}
|
|
if (error == 0) {
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCGIFPSRCADDR:
|
|
sin->sin_addr = sc->gif_iphdr->ip_src;
|
|
break;
|
|
case SIOCGIFPDSTADDR:
|
|
sin->sin_addr = sc->gif_iphdr->ip_dst;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
sin6->sin6_addr = sc->gif_ip6hdr->ip6_src;
|
|
break;
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
sin6->sin6_addr = sc->gif_ip6hdr->ip6_dst;
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
GIF_RUNLOCK(sc);
|
|
if (error != 0)
|
|
break;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCGIFPSRCADDR:
|
|
case SIOCGIFPDSTADDR:
|
|
error = prison_if(curthread->td_ucred,
|
|
(struct sockaddr *)sin);
|
|
if (error != 0)
|
|
memset(sin, 0, sizeof(*sin));
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
error = prison_if(curthread->td_ucred,
|
|
(struct sockaddr *)sin6);
|
|
if (error == 0)
|
|
error = sa6_recoverscope(sin6);
|
|
if (error != 0)
|
|
memset(sin6, 0, sizeof(*sin6));
|
|
#endif
|
|
}
|
|
break;
|
|
case GIFGOPTS:
|
|
options = sc->gif_options;
|
|
error = copyout(&options, ifr->ifr_data, sizeof(options));
|
|
break;
|
|
case GIFSOPTS:
|
|
if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
|
|
break;
|
|
error = copyin(ifr->ifr_data, &options, sizeof(options));
|
|
if (error)
|
|
break;
|
|
if (options & ~GIF_OPTMASK)
|
|
error = EINVAL;
|
|
else
|
|
sc->gif_options = options;
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
bad:
|
|
sx_xunlock(&gif_ioctl_sx);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
gif_detach(struct gif_softc *sc)
|
|
{
|
|
|
|
sx_assert(&gif_ioctl_sx, SA_XLOCKED);
|
|
if (sc->gif_ecookie != NULL)
|
|
encap_detach(sc->gif_ecookie);
|
|
sc->gif_ecookie = NULL;
|
|
}
|
|
|
|
static int
|
|
gif_attach(struct gif_softc *sc, int af)
|
|
{
|
|
|
|
sx_assert(&gif_ioctl_sx, SA_XLOCKED);
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
return (in_gif_attach(sc));
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
return (in6_gif_attach(sc));
|
|
#endif
|
|
}
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
static int
|
|
gif_set_tunnel(struct ifnet *ifp, struct sockaddr *src, struct sockaddr *dst)
|
|
{
|
|
struct gif_softc *sc = ifp->if_softc;
|
|
struct gif_softc *tsc;
|
|
#ifdef INET
|
|
struct ip *ip;
|
|
#endif
|
|
#ifdef INET6
|
|
struct ip6_hdr *ip6;
|
|
#endif
|
|
void *hdr;
|
|
int error = 0;
|
|
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
/* Disallow parallel tunnels unless instructed otherwise. */
|
|
if (V_parallel_tunnels == 0) {
|
|
GIF_LIST_LOCK();
|
|
LIST_FOREACH(tsc, &V_gif_softc_list, gif_list) {
|
|
if (tsc == sc || tsc->gif_family != src->sa_family)
|
|
continue;
|
|
#ifdef INET
|
|
if (tsc->gif_family == AF_INET &&
|
|
tsc->gif_iphdr->ip_src.s_addr ==
|
|
satosin(src)->sin_addr.s_addr &&
|
|
tsc->gif_iphdr->ip_dst.s_addr ==
|
|
satosin(dst)->sin_addr.s_addr) {
|
|
error = EADDRNOTAVAIL;
|
|
GIF_LIST_UNLOCK();
|
|
goto bad;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (tsc->gif_family == AF_INET6 &&
|
|
IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_src,
|
|
&satosin6(src)->sin6_addr) &&
|
|
IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_dst,
|
|
&satosin6(dst)->sin6_addr)) {
|
|
error = EADDRNOTAVAIL;
|
|
GIF_LIST_UNLOCK();
|
|
goto bad;
|
|
}
|
|
#endif
|
|
}
|
|
GIF_LIST_UNLOCK();
|
|
}
|
|
switch (src->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
hdr = ip = malloc(sizeof(struct ip), M_GIF,
|
|
M_WAITOK | M_ZERO);
|
|
ip->ip_src.s_addr = satosin(src)->sin_addr.s_addr;
|
|
ip->ip_dst.s_addr = satosin(dst)->sin_addr.s_addr;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
hdr = ip6 = malloc(sizeof(struct ip6_hdr), M_GIF,
|
|
M_WAITOK | M_ZERO);
|
|
ip6->ip6_src = satosin6(src)->sin6_addr;
|
|
ip6->ip6_dst = satosin6(dst)->sin6_addr;
|
|
ip6->ip6_vfc = IPV6_VERSION;
|
|
break;
|
|
#endif
|
|
default:
|
|
return (EAFNOSUPPORT);
|
|
};
|
|
|
|
if (sc->gif_family != src->sa_family)
|
|
gif_detach(sc);
|
|
if (sc->gif_family == 0 ||
|
|
sc->gif_family != src->sa_family)
|
|
error = gif_attach(sc, src->sa_family);
|
|
|
|
GIF_WLOCK(sc);
|
|
if (sc->gif_family != 0)
|
|
free(sc->gif_hdr, M_GIF);
|
|
sc->gif_family = src->sa_family;
|
|
sc->gif_hdr = hdr;
|
|
GIF_WUNLOCK(sc);
|
|
#if defined(INET) || defined(INET6)
|
|
bad:
|
|
#endif
|
|
if (error == 0 && sc->gif_family != 0)
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
else
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
gif_delete_tunnel(struct ifnet *ifp)
|
|
{
|
|
struct gif_softc *sc = ifp->if_softc;
|
|
int family;
|
|
|
|
if (sc == NULL)
|
|
return;
|
|
|
|
GIF_WLOCK(sc);
|
|
family = sc->gif_family;
|
|
sc->gif_family = 0;
|
|
GIF_WUNLOCK(sc);
|
|
if (family != 0) {
|
|
gif_detach(sc);
|
|
free(sc->gif_hdr, M_GIF);
|
|
}
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
}
|