a34c6aeb85
setting (either default or if supported as set by SIOCSIFFIB, e.g. from ifconfig). Submitted by: Alexander V. Chernikov (melifaro ipfw.ru) Reviewed by: julian MFC after: 2 weeks
1032 lines
23 KiB
C
1032 lines
23 KiB
C
/* $FreeBSD$ */
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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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* 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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#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/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/socket.h>
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#include <sys/sockio.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_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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#ifdef INET
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#include <netinet/in_var.h>
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#include <netinet/in_gif.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_var.h>
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#include <netinet6/scope6_var.h>
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#include <netinet6/in6_gif.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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#define GIFNAME "gif"
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/*
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* gif_mtx protects the global gif_softc_list.
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*/
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static struct mtx 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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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 void gif_start(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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IFC_SIMPLE_DECLARE(gif, 0);
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static int gifmodevent(module_t, int, void *);
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SYSCTL_DECL(_net_link);
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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_VNET_INT(_net_link_gif, OID_AUTO, max_nesting, 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_VNET_INT(_net_link_gif, OID_AUTO, parallel_tunnels, CTLFLAG_RW,
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&VNET_NAME(parallel_tunnels), 0, "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(ifc, unit, params)
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struct if_clone *ifc;
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int unit;
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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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if (GIF2IFP(sc) == NULL) {
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free(sc, M_GIF);
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return (ENOSPC);
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}
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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), ifc->ifc_name, unit);
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sc->encap_cookie4 = sc->encap_cookie6 = NULL;
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sc->gif_options = GIF_ACCEPT_REVETHIP;
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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_start = gif_start;
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GIF2IFP(sc)->if_output = gif_output;
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GIF2IFP(sc)->if_snd.ifq_maxlen = ifqmaxlen;
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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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mtx_lock(&gif_mtx);
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LIST_INSERT_HEAD(&V_gif_softc_list, sc, gif_list);
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mtx_unlock(&gif_mtx);
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return (0);
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}
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static void
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gif_clone_destroy(ifp)
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struct ifnet *ifp;
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{
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#if defined(INET) || defined(INET6)
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int err;
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#endif
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struct gif_softc *sc = ifp->if_softc;
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mtx_lock(&gif_mtx);
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LIST_REMOVE(sc, gif_list);
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mtx_unlock(&gif_mtx);
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gif_delete_tunnel(ifp);
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#ifdef INET6
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if (sc->encap_cookie6 != NULL) {
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err = encap_detach(sc->encap_cookie6);
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KASSERT(err == 0, ("Unexpected error detaching encap_cookie6"));
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}
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#endif
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#ifdef INET
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if (sc->encap_cookie4 != NULL) {
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err = encap_detach(sc->encap_cookie4);
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KASSERT(err == 0, ("Unexpected error detaching encap_cookie4"));
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}
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#endif
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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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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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}
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VNET_SYSINIT(vnet_gif_init, SI_SUB_PSEUDO, SI_ORDER_MIDDLE, vnet_gif_init,
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NULL);
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static int
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gifmodevent(mod, type, data)
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module_t mod;
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int type;
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void *data;
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{
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switch (type) {
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case MOD_LOAD:
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mtx_init(&gif_mtx, "gif_mtx", NULL, MTX_DEF);
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if_clone_attach(&gif_cloner);
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break;
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case MOD_UNLOAD:
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if_clone_detach(&gif_cloner);
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mtx_destroy(&gif_mtx);
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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(m, off, proto, arg)
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const struct mbuf *m;
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int off;
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int proto;
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void *arg;
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{
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struct ip ip;
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struct gif_softc *sc;
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sc = (struct gif_softc *)arg;
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if (sc == NULL)
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return 0;
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if ((GIF2IFP(sc)->if_flags & IFF_UP) == 0)
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return 0;
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/* no physical address */
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if (!sc->gif_psrc || !sc->gif_pdst)
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return 0;
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switch (proto) {
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#ifdef INET
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case IPPROTO_IPV4:
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break;
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#endif
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#ifdef INET6
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case IPPROTO_IPV6:
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break;
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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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return 0;
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}
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/* Bail on short packets */
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if (m->m_pkthdr.len < sizeof(ip))
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return 0;
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m_copydata(m, 0, sizeof(ip), (caddr_t)&ip);
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switch (ip.ip_v) {
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#ifdef INET
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case 4:
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if (sc->gif_psrc->sa_family != AF_INET ||
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sc->gif_pdst->sa_family != AF_INET)
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return 0;
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return gif_encapcheck4(m, off, proto, arg);
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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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return 0;
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if (sc->gif_psrc->sa_family != AF_INET6 ||
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sc->gif_pdst->sa_family != AF_INET6)
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return 0;
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return gif_encapcheck6(m, off, proto, arg);
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#endif
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default:
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return 0;
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}
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}
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static void
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gif_start(struct ifnet *ifp)
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{
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struct gif_softc *sc;
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struct mbuf *m;
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sc = ifp->if_softc;
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ifp->if_drv_flags |= IFF_DRV_OACTIVE;
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for (;;) {
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IFQ_DEQUEUE(&ifp->if_snd, m);
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if (m == 0)
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break;
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gif_output(ifp, m, sc->gif_pdst, NULL);
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}
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ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
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return;
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}
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int
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gif_output(ifp, m, dst, ro)
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struct ifnet *ifp;
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struct mbuf *m;
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struct sockaddr *dst;
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struct route *ro;
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{
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struct gif_softc *sc = ifp->if_softc;
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struct m_tag *mtag;
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int error = 0;
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int gif_called;
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u_int32_t af;
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#ifdef MAC
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error = mac_ifnet_check_transmit(ifp, m);
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if (error) {
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m_freem(m);
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goto end;
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}
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#endif
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/*
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* gif may cause infinite recursion calls when misconfigured.
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* We'll prevent this by detecting loops.
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*
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* High nesting level may cause stack exhaustion.
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* We'll prevent this by introducing upper limit.
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*/
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gif_called = 1;
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mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, NULL);
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while (mtag != NULL) {
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if (*(struct ifnet **)(mtag + 1) == ifp) {
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log(LOG_NOTICE,
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"gif_output: loop detected on %s\n",
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(*(struct ifnet **)(mtag + 1))->if_xname);
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m_freem(m);
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error = EIO; /* is there better errno? */
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goto end;
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}
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mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, mtag);
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gif_called++;
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}
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if (gif_called > V_max_gif_nesting) {
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log(LOG_NOTICE,
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"gif_output: recursively called too many times(%d)\n",
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gif_called);
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m_freem(m);
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error = EIO; /* is there better errno? */
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goto end;
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}
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mtag = m_tag_alloc(MTAG_GIF, MTAG_GIF_CALLED, sizeof(struct ifnet *),
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M_NOWAIT);
|
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if (mtag == NULL) {
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m_freem(m);
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error = ENOMEM;
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goto end;
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}
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*(struct ifnet **)(mtag + 1) = ifp;
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m_tag_prepend(m, mtag);
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m->m_flags &= ~(M_BCAST|M_MCAST);
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|
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GIF_LOCK(sc);
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|
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if (!(ifp->if_flags & IFF_UP) ||
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sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
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GIF_UNLOCK(sc);
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m_freem(m);
|
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error = ENETDOWN;
|
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goto end;
|
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}
|
|
|
|
/* BPF writes need to be handled specially. */
|
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if (dst->sa_family == AF_UNSPEC) {
|
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bcopy(dst->sa_data, &af, sizeof(af));
|
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dst->sa_family = af;
|
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}
|
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|
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af = dst->sa_family;
|
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BPF_MTAP2(ifp, &af, sizeof(af), m);
|
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ifp->if_opackets++;
|
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ifp->if_obytes += m->m_pkthdr.len;
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|
|
/* override to IPPROTO_ETHERIP for bridged traffic */
|
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if (ifp->if_bridge)
|
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af = AF_LINK;
|
|
|
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M_SETFIB(m, sc->gif_fibnum);
|
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/* inner AF-specific encapsulation */
|
|
|
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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_psrc->sa_family) {
|
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#ifdef INET
|
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case AF_INET:
|
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error = in_gif_output(ifp, af, m);
|
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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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error = in6_gif_output(ifp, af, m);
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break;
|
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#endif
|
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default:
|
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m_freem(m);
|
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error = ENETDOWN;
|
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}
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|
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GIF_UNLOCK(sc);
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end:
|
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if (error)
|
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ifp->if_oerrors++;
|
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return (error);
|
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}
|
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|
|
void
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gif_input(m, af, ifp)
|
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struct mbuf *m;
|
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int af;
|
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struct ifnet *ifp;
|
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{
|
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int isr, n;
|
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struct gif_softc *sc;
|
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struct etherip_header *eip;
|
|
struct ether_header *eh;
|
|
struct ifnet *oldifp;
|
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|
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if (ifp == NULL) {
|
|
/* just in case */
|
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m_freem(m);
|
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return;
|
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}
|
|
sc = ifp->if_softc;
|
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m->m_pkthdr.rcvif = ifp;
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|
|
|
#ifdef MAC
|
|
mac_ifnet_create_mbuf(ifp, m);
|
|
#endif
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|
|
|
if (bpf_peers_present(ifp->if_bpf)) {
|
|
u_int32_t af1 = af;
|
|
bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
|
|
}
|
|
|
|
if (ng_gif_input_p != NULL) {
|
|
(*ng_gif_input_p)(ifp, &m, af);
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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) {
|
|
ifp->if_ierrors++;
|
|
return;
|
|
}
|
|
}
|
|
|
|
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 (sc->gif_options & GIF_ACCEPT_REVETHIP) {
|
|
if (eip->eip_resvl != ETHERIP_VERSION
|
|
&& eip->eip_ver != ETHERIP_VERSION) {
|
|
/* discard unknown versions */
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
} else {
|
|
if (eip->eip_ver != ETHERIP_VERSION) {
|
|
/* discard unknown versions */
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
}
|
|
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;
|
|
ifp->if_imcasts++;
|
|
}
|
|
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;
|
|
}
|
|
|
|
ifp->if_ipackets++;
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
M_SETFIB(m, ifp->if_fib);
|
|
netisr_dispatch(isr, m);
|
|
}
|
|
|
|
/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
|
|
int
|
|
gif_ioctl(ifp, cmd, data)
|
|
struct ifnet *ifp;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
{
|
|
struct gif_softc *sc = ifp->if_softc;
|
|
struct ifreq *ifr = (struct ifreq*)data;
|
|
int error = 0, size;
|
|
u_int options;
|
|
struct sockaddr *dst, *src;
|
|
#ifdef SIOCSIFMTU /* xxx */
|
|
u_long mtu;
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
break;
|
|
|
|
case SIOCSIFDSTADDR:
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
break;
|
|
|
|
#ifdef SIOCSIFMTU /* xxx */
|
|
case SIOCGIFMTU:
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
mtu = ifr->ifr_mtu;
|
|
if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX)
|
|
return (EINVAL);
|
|
ifp->if_mtu = mtu;
|
|
break;
|
|
#endif /* SIOCSIFMTU */
|
|
|
|
#ifdef INET
|
|
case SIOCSIFPHYADDR:
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
#endif /* INET6 */
|
|
case SIOCSLIFPHYADDR:
|
|
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
|
|
case SIOCSLIFPHYADDR:
|
|
src = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->addr);
|
|
dst = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->dstaddr);
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
/* sa_family must be equal */
|
|
if (src->sa_family != dst->sa_family)
|
|
return EINVAL;
|
|
|
|
/* validate sa_len */
|
|
switch (src->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (src->sa_len != sizeof(struct sockaddr_in))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (src->sa_len != sizeof(struct sockaddr_in6))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (dst->sa_len != sizeof(struct sockaddr_in))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (dst->sa_len != sizeof(struct sockaddr_in6))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
|
|
/* check sa_family looks sane for the cmd */
|
|
switch (cmd) {
|
|
case SIOCSIFPHYADDR:
|
|
if (src->sa_family == AF_INET)
|
|
break;
|
|
return EAFNOSUPPORT;
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
if (src->sa_family == AF_INET6)
|
|
break;
|
|
return EAFNOSUPPORT;
|
|
#endif /* INET6 */
|
|
case SIOCSLIFPHYADDR:
|
|
/* checks done in the above */
|
|
break;
|
|
}
|
|
|
|
error = gif_set_tunnel(GIF2IFP(sc), src, dst);
|
|
break;
|
|
|
|
#ifdef SIOCDIFPHYADDR
|
|
case SIOCDIFPHYADDR:
|
|
gif_delete_tunnel(GIF2IFP(sc));
|
|
break;
|
|
#endif
|
|
|
|
case SIOCGIFPSRCADDR:
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
#endif /* INET6 */
|
|
if (sc->gif_psrc == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
src = sc->gif_psrc;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCGIFPSRCADDR:
|
|
dst = &ifr->ifr_addr;
|
|
size = sizeof(ifr->ifr_addr);
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
dst = (struct sockaddr *)
|
|
&(((struct in6_ifreq *)data)->ifr_addr);
|
|
size = sizeof(((struct in6_ifreq *)data)->ifr_addr);
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
#ifdef INET6
|
|
if (dst->sa_family == AF_INET6) {
|
|
error = sa6_recoverscope((struct sockaddr_in6 *)dst);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
#endif
|
|
break;
|
|
|
|
case SIOCGIFPDSTADDR:
|
|
#ifdef INET6
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
#endif /* INET6 */
|
|
if (sc->gif_pdst == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
src = sc->gif_pdst;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCGIFPDSTADDR:
|
|
dst = &ifr->ifr_addr;
|
|
size = sizeof(ifr->ifr_addr);
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
dst = (struct sockaddr *)
|
|
&(((struct in6_ifreq *)data)->ifr_addr);
|
|
size = sizeof(((struct in6_ifreq *)data)->ifr_addr);
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
error = prison_if(curthread->td_ucred, src);
|
|
if (error != 0)
|
|
return (error);
|
|
error = prison_if(curthread->td_ucred, dst);
|
|
if (error != 0)
|
|
return (error);
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
#ifdef INET6
|
|
if (dst->sa_family == AF_INET6) {
|
|
error = sa6_recoverscope((struct sockaddr_in6 *)dst);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
#endif
|
|
break;
|
|
|
|
case SIOCGLIFPHYADDR:
|
|
if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
|
|
/* copy src */
|
|
src = sc->gif_psrc;
|
|
dst = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->addr);
|
|
size = sizeof(((struct if_laddrreq *)data)->addr);
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
|
|
/* copy dst */
|
|
src = sc->gif_pdst;
|
|
dst = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->dstaddr);
|
|
size = sizeof(((struct if_laddrreq *)data)->dstaddr);
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
/* if_ioctl() takes care of it */
|
|
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:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* XXXRW: There's a general event-ordering issue here: the code to check
|
|
* if a given tunnel is already present happens before we perform a
|
|
* potentially blocking setup of the tunnel. This code needs to be
|
|
* re-ordered so that the check and replacement can be atomic using
|
|
* a mutex.
|
|
*/
|
|
int
|
|
gif_set_tunnel(ifp, src, dst)
|
|
struct ifnet *ifp;
|
|
struct sockaddr *src;
|
|
struct sockaddr *dst;
|
|
{
|
|
struct gif_softc *sc = ifp->if_softc;
|
|
struct gif_softc *sc2;
|
|
struct sockaddr *osrc, *odst, *sa;
|
|
int error = 0;
|
|
|
|
mtx_lock(&gif_mtx);
|
|
LIST_FOREACH(sc2, &V_gif_softc_list, gif_list) {
|
|
if (sc2 == sc)
|
|
continue;
|
|
if (!sc2->gif_pdst || !sc2->gif_psrc)
|
|
continue;
|
|
if (sc2->gif_pdst->sa_family != dst->sa_family ||
|
|
sc2->gif_pdst->sa_len != dst->sa_len ||
|
|
sc2->gif_psrc->sa_family != src->sa_family ||
|
|
sc2->gif_psrc->sa_len != src->sa_len)
|
|
continue;
|
|
|
|
/*
|
|
* Disallow parallel tunnels unless instructed
|
|
* otherwise.
|
|
*/
|
|
if (!V_parallel_tunnels &&
|
|
bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 &&
|
|
bcmp(sc2->gif_psrc, src, src->sa_len) == 0) {
|
|
error = EADDRNOTAVAIL;
|
|
mtx_unlock(&gif_mtx);
|
|
goto bad;
|
|
}
|
|
|
|
/* XXX both end must be valid? (I mean, not 0.0.0.0) */
|
|
}
|
|
mtx_unlock(&gif_mtx);
|
|
|
|
/* XXX we can detach from both, but be polite just in case */
|
|
if (sc->gif_psrc)
|
|
switch (sc->gif_psrc->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
(void)in_gif_detach(sc);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
(void)in6_gif_detach(sc);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
osrc = sc->gif_psrc;
|
|
sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK);
|
|
bcopy((caddr_t)src, (caddr_t)sa, src->sa_len);
|
|
sc->gif_psrc = sa;
|
|
|
|
odst = sc->gif_pdst;
|
|
sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK);
|
|
bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len);
|
|
sc->gif_pdst = sa;
|
|
|
|
switch (sc->gif_psrc->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
error = in_gif_attach(sc);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
/*
|
|
* Check validity of the scope zone ID of the addresses, and
|
|
* convert it into the kernel internal form if necessary.
|
|
*/
|
|
error = sa6_embedscope((struct sockaddr_in6 *)sc->gif_psrc, 0);
|
|
if (error != 0)
|
|
break;
|
|
error = sa6_embedscope((struct sockaddr_in6 *)sc->gif_pdst, 0);
|
|
if (error != 0)
|
|
break;
|
|
error = in6_gif_attach(sc);
|
|
break;
|
|
#endif
|
|
}
|
|
if (error) {
|
|
/* rollback */
|
|
free((caddr_t)sc->gif_psrc, M_IFADDR);
|
|
free((caddr_t)sc->gif_pdst, M_IFADDR);
|
|
sc->gif_psrc = osrc;
|
|
sc->gif_pdst = odst;
|
|
goto bad;
|
|
}
|
|
|
|
if (osrc)
|
|
free((caddr_t)osrc, M_IFADDR);
|
|
if (odst)
|
|
free((caddr_t)odst, M_IFADDR);
|
|
|
|
bad:
|
|
if (sc->gif_psrc && sc->gif_pdst)
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
else
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
|
|
return error;
|
|
}
|
|
|
|
void
|
|
gif_delete_tunnel(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct gif_softc *sc = ifp->if_softc;
|
|
|
|
if (sc->gif_psrc) {
|
|
free((caddr_t)sc->gif_psrc, M_IFADDR);
|
|
sc->gif_psrc = NULL;
|
|
}
|
|
if (sc->gif_pdst) {
|
|
free((caddr_t)sc->gif_pdst, M_IFADDR);
|
|
sc->gif_pdst = NULL;
|
|
}
|
|
/* it is safe to detach from both */
|
|
#ifdef INET
|
|
(void)in_gif_detach(sc);
|
|
#endif
|
|
#ifdef INET6
|
|
(void)in6_gif_detach(sc);
|
|
#endif
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
}
|