162587Sitojun/* $FreeBSD$ */ 295023Ssuz/* $KAME: if_gif.c,v 1.87 2001/10/19 08:50:27 itojun Exp $ */ 362587Sitojun 4139823Simp/*- 554263Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 654263Sshin * All rights reserved. 754263Sshin * 854263Sshin * Redistribution and use in source and binary forms, with or without 954263Sshin * modification, are permitted provided that the following conditions 1054263Sshin * are met: 1154263Sshin * 1. Redistributions of source code must retain the above copyright 1254263Sshin * notice, this list of conditions and the following disclaimer. 1354263Sshin * 2. Redistributions in binary form must reproduce the above copyright 1454263Sshin * notice, this list of conditions and the following disclaimer in the 1554263Sshin * documentation and/or other materials provided with the distribution. 1654263Sshin * 3. Neither the name of the project nor the names of its contributors 1754263Sshin * may be used to endorse or promote products derived from this software 1854263Sshin * without specific prior written permission. 1954263Sshin * 2054263Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2154263Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2254263Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2354263Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2454263Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2554263Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2654263Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2754263Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2854263Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2954263Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3054263Sshin * SUCH DAMAGE. 3154263Sshin */ 3254263Sshin 3354263Sshin#include "opt_inet.h" 3454263Sshin#include "opt_inet6.h" 3554263Sshin 3654263Sshin#include <sys/param.h> 3754263Sshin#include <sys/systm.h> 38219206Sbz#include <sys/jail.h> 3954263Sshin#include <sys/kernel.h> 4054263Sshin#include <sys/malloc.h> 4154263Sshin#include <sys/mbuf.h> 42129880Sphk#include <sys/module.h> 4354263Sshin#include <sys/socket.h> 4454263Sshin#include <sys/sockio.h> 4554263Sshin#include <sys/errno.h> 4654263Sshin#include <sys/time.h> 4791270Sbrooks#include <sys/sysctl.h> 4854263Sshin#include <sys/syslog.h> 49193664Shrs#include <sys/priv.h> 50178888Sjulian#include <sys/proc.h> 5162587Sitojun#include <sys/protosw.h> 5279106Sbrooks#include <sys/conf.h> 5354263Sshin#include <machine/cpu.h> 5454263Sshin 5554263Sshin#include <net/if.h> 56130933Sbrooks#include <net/if_clone.h> 5754263Sshin#include <net/if_types.h> 5854263Sshin#include <net/netisr.h> 5954263Sshin#include <net/route.h> 6054263Sshin#include <net/bpf.h> 61196019Srwatson#include <net/vnet.h> 6254263Sshin 6354263Sshin#include <netinet/in.h> 6454263Sshin#include <netinet/in_systm.h> 6578064Sume#include <netinet/ip.h> 6678064Sume#ifdef INET 6754263Sshin#include <netinet/in_var.h> 6854263Sshin#include <netinet/in_gif.h> 6979106Sbrooks#include <netinet/ip_var.h> 7054263Sshin#endif /* INET */ 7154263Sshin 7254263Sshin#ifdef INET6 7354263Sshin#ifndef INET 7454263Sshin#include <netinet/in.h> 7554263Sshin#endif 7654263Sshin#include <netinet6/in6_var.h> 7754263Sshin#include <netinet/ip6.h> 7854263Sshin#include <netinet6/ip6_var.h> 79148385Sume#include <netinet6/scope6_var.h> 8054263Sshin#include <netinet6/in6_gif.h> 8162587Sitojun#include <netinet6/ip6protosw.h> 8254263Sshin#endif /* INET6 */ 8354263Sshin 8462587Sitojun#include <netinet/ip_encap.h> 85153621Sthompsa#include <net/ethernet.h> 86153621Sthompsa#include <net/if_bridgevar.h> 8754263Sshin#include <net/if_gif.h> 8854263Sshin 89163606Srwatson#include <security/mac/mac_framework.h> 90163606Srwatson 91241610Sglebiusstatic const char gifname[] = "gif"; 9262587Sitojun 93127305Srwatson/* 94127898Sru * gif_mtx protects the global gif_softc_list. 95127305Srwatson */ 96127305Srwatsonstatic struct mtx gif_mtx; 9779106Sbrooksstatic MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); 98215701Sdimstatic VNET_DEFINE(LIST_HEAD(, gif_softc), gif_softc_list); 99195727Srwatson#define V_gif_softc_list VNET(gif_softc_list) 100195699Srwatson 10183998Sbrooksvoid (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af); 10283998Sbrooksvoid (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af); 10383998Sbrooksvoid (*ng_gif_attach_p)(struct ifnet *ifp); 10483998Sbrooksvoid (*ng_gif_detach_p)(struct ifnet *ifp); 10583998Sbrooks 106153621Sthompsastatic void gif_start(struct ifnet *); 107160195Ssamstatic int gif_clone_create(struct if_clone *, int, caddr_t); 108128209Sbrooksstatic void gif_clone_destroy(struct ifnet *); 109241610Sglebiusstatic struct if_clone *gif_cloner; 11079106Sbrooks 11192725Salfredstatic int gifmodevent(module_t, int, void *); 11279106Sbrooks 11391270SbrooksSYSCTL_DECL(_net_link); 114227309Sedstatic SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0, 11591270Sbrooks "Generic Tunnel Interface"); 11662587Sitojun#ifndef MAX_GIF_NEST 11762587Sitojun/* 11891270Sbrooks * This macro controls the default upper limitation on nesting of gif tunnels. 11962587Sitojun * Since, setting a large value to this macro with a careless configuration 12062587Sitojun * may introduce system crash, we don't allow any nestings by default. 12162587Sitojun * If you need to configure nested gif tunnels, you can define this macro 12295023Ssuz * in your kernel configuration file. However, if you do so, please be 12362587Sitojun * careful to configure the tunnels so that it won't make a loop. 12462587Sitojun */ 12562587Sitojun#define MAX_GIF_NEST 1 12662587Sitojun#endif 127215701Sdimstatic VNET_DEFINE(int, max_gif_nesting) = MAX_GIF_NEST; 128195837Srwatson#define V_max_gif_nesting VNET(max_gif_nesting) 129195699SrwatsonSYSCTL_VNET_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_RW, 130195699Srwatson &VNET_NAME(max_gif_nesting), 0, "Max nested tunnels"); 13162587Sitojun 13291270Sbrooks/* 13391270Sbrooks * By default, we disallow creation of multiple tunnels between the same 13491270Sbrooks * pair of addresses. Some applications require this functionality so 13591270Sbrooks * we allow control over this check here. 13691270Sbrooks */ 137195837Srwatson#ifdef XBONEHACK 138215701Sdimstatic VNET_DEFINE(int, parallel_tunnels) = 1; 139195837Srwatson#else 140215701Sdimstatic VNET_DEFINE(int, parallel_tunnels) = 0; 141195837Srwatson#endif 142195837Srwatson#define V_parallel_tunnels VNET(parallel_tunnels) 143195699SrwatsonSYSCTL_VNET_INT(_net_link_gif, OID_AUTO, parallel_tunnels, CTLFLAG_RW, 144195699Srwatson &VNET_NAME(parallel_tunnels), 0, "Allow parallel tunnels?"); 14591270Sbrooks 146176879Sthompsa/* copy from src/sys/net/if_ethersubr.c */ 147176879Sthompsastatic const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 148176879Sthompsa { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 149176879Sthompsa#ifndef ETHER_IS_BROADCAST 150176879Sthompsa#define ETHER_IS_BROADCAST(addr) \ 151176879Sthompsa (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 152176879Sthompsa#endif 153176879Sthompsa 154128209Sbrooksstatic int 155160195Ssamgif_clone_create(ifc, unit, params) 15679106Sbrooks struct if_clone *ifc; 15792081Smux int unit; 158160195Ssam caddr_t params; 15954263Sshin{ 16078064Sume struct gif_softc *sc; 16154263Sshin 162131672Sbms sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO); 163178888Sjulian sc->gif_fibnum = curthread->td_proc->p_fibnum; 164147256Sbrooks GIF2IFP(sc) = if_alloc(IFT_GIF); 165147256Sbrooks if (GIF2IFP(sc) == NULL) { 166147256Sbrooks free(sc, M_GIF); 167147256Sbrooks return (ENOSPC); 168147256Sbrooks } 16979106Sbrooks 170155037Sglebius GIF_LOCK_INIT(sc); 171155037Sglebius 172147256Sbrooks GIF2IFP(sc)->if_softc = sc; 173241610Sglebius if_initname(GIF2IFP(sc), gifname, unit); 17479106Sbrooks 17579106Sbrooks sc->encap_cookie4 = sc->encap_cookie6 = NULL; 176253261Shrs sc->gif_options = 0; 17762587Sitojun 178147256Sbrooks GIF2IFP(sc)->if_addrlen = 0; 179147256Sbrooks GIF2IFP(sc)->if_mtu = GIF_MTU; 180147256Sbrooks GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 18178064Sume#if 0 18279106Sbrooks /* turn off ingress filter */ 183147256Sbrooks GIF2IFP(sc)->if_flags |= IFF_LINK2; 18478064Sume#endif 185147256Sbrooks GIF2IFP(sc)->if_ioctl = gif_ioctl; 186153621Sthompsa GIF2IFP(sc)->if_start = gif_start; 187147256Sbrooks GIF2IFP(sc)->if_output = gif_output; 188207554Ssobomax GIF2IFP(sc)->if_snd.ifq_maxlen = ifqmaxlen; 189147256Sbrooks if_attach(GIF2IFP(sc)); 190147611Sdwmalone bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t)); 19183998Sbrooks if (ng_gif_attach_p != NULL) 192147256Sbrooks (*ng_gif_attach_p)(GIF2IFP(sc)); 193155037Sglebius 194155037Sglebius mtx_lock(&gif_mtx); 195181803Sbz LIST_INSERT_HEAD(&V_gif_softc_list, sc, gif_list); 196155037Sglebius mtx_unlock(&gif_mtx); 197155037Sglebius 198155037Sglebius return (0); 19979106Sbrooks} 20079106Sbrooks 201127305Srwatsonstatic void 202151266Sthompsagif_clone_destroy(ifp) 203151266Sthompsa struct ifnet *ifp; 20479106Sbrooks{ 205184678Sbz#if defined(INET) || defined(INET6) 20679106Sbrooks int err; 207184678Sbz#endif 208151266Sthompsa struct gif_softc *sc = ifp->if_softc; 20979106Sbrooks 210151266Sthompsa mtx_lock(&gif_mtx); 211151266Sthompsa LIST_REMOVE(sc, gif_list); 212151266Sthompsa mtx_unlock(&gif_mtx); 213151266Sthompsa 214127305Srwatson gif_delete_tunnel(ifp); 215105293Sume#ifdef INET6 216105293Sume if (sc->encap_cookie6 != NULL) { 217105293Sume err = encap_detach(sc->encap_cookie6); 218105293Sume KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 219105293Sume } 220105293Sume#endif 221105293Sume#ifdef INET 22279106Sbrooks if (sc->encap_cookie4 != NULL) { 22379106Sbrooks err = encap_detach(sc->encap_cookie4); 22479106Sbrooks KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 22579106Sbrooks } 226105293Sume#endif 22779106Sbrooks 22883998Sbrooks if (ng_gif_detach_p != NULL) 22983998Sbrooks (*ng_gif_detach_p)(ifp); 23079106Sbrooks bpfdetach(ifp); 23179106Sbrooks if_detach(ifp); 232147256Sbrooks if_free(ifp); 23379106Sbrooks 234155037Sglebius GIF_LOCK_DESTROY(sc); 235155037Sglebius 23679106Sbrooks free(sc, M_GIF); 23779106Sbrooks} 23879106Sbrooks 239195837Srwatsonstatic void 240195837Srwatsonvnet_gif_init(const void *unused __unused) 241190787Szec{ 242190787Szec 243190787Szec LIST_INIT(&V_gif_softc_list); 244190787Szec} 245195837SrwatsonVNET_SYSINIT(vnet_gif_init, SI_SUB_PSEUDO, SI_ORDER_MIDDLE, vnet_gif_init, 246195837Srwatson NULL); 247190787Szec 248190787Szecstatic int 24979106Sbrooksgifmodevent(mod, type, data) 25079106Sbrooks module_t mod; 25179106Sbrooks int type; 25279106Sbrooks void *data; 25379106Sbrooks{ 25479106Sbrooks 25579106Sbrooks switch (type) { 25679106Sbrooks case MOD_LOAD: 257127305Srwatson mtx_init(&gif_mtx, "gif_mtx", NULL, MTX_DEF); 258241610Sglebius gif_cloner = if_clone_simple(gifname, gif_clone_create, 259241610Sglebius gif_clone_destroy, 0); 260195837Srwatson break; 26179106Sbrooks 26279106Sbrooks case MOD_UNLOAD: 263241610Sglebius if_clone_detach(gif_cloner); 264127305Srwatson mtx_destroy(&gif_mtx); 26579106Sbrooks break; 266132199Sphk default: 267132199Sphk return EOPNOTSUPP; 26854263Sshin } 26979106Sbrooks return 0; 27054263Sshin} 27154263Sshin 27279106Sbrooksstatic moduledata_t gif_mod = { 27379106Sbrooks "if_gif", 27479106Sbrooks gifmodevent, 275241394Skevlo 0 27679106Sbrooks}; 27754263Sshin 27879106SbrooksDECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 27983997SbrooksMODULE_VERSION(if_gif, 1); 28079106Sbrooks 281105293Sumeint 28262587Sitojungif_encapcheck(m, off, proto, arg) 28362587Sitojun const struct mbuf *m; 28462587Sitojun int off; 28562587Sitojun int proto; 28662587Sitojun void *arg; 28762587Sitojun{ 28862587Sitojun struct ip ip; 28962587Sitojun struct gif_softc *sc; 29062587Sitojun 29162587Sitojun sc = (struct gif_softc *)arg; 29262587Sitojun if (sc == NULL) 29362587Sitojun return 0; 29462587Sitojun 295147256Sbrooks if ((GIF2IFP(sc)->if_flags & IFF_UP) == 0) 29662587Sitojun return 0; 29762587Sitojun 29862587Sitojun /* no physical address */ 29962587Sitojun if (!sc->gif_psrc || !sc->gif_pdst) 30062587Sitojun return 0; 30162587Sitojun 30262587Sitojun switch (proto) { 30362587Sitojun#ifdef INET 30462587Sitojun case IPPROTO_IPV4: 30562587Sitojun break; 30662587Sitojun#endif 30762587Sitojun#ifdef INET6 30862587Sitojun case IPPROTO_IPV6: 30962587Sitojun break; 31062587Sitojun#endif 311153621Sthompsa case IPPROTO_ETHERIP: 312153621Sthompsa break; 313153621Sthompsa 31462587Sitojun default: 31562587Sitojun return 0; 31662587Sitojun } 31762587Sitojun 318105339Sume /* Bail on short packets */ 319105339Sume if (m->m_pkthdr.len < sizeof(ip)) 320105339Sume return 0; 321105339Sume 32291327Sbrooks m_copydata(m, 0, sizeof(ip), (caddr_t)&ip); 32362587Sitojun 32462587Sitojun switch (ip.ip_v) { 32562587Sitojun#ifdef INET 32662587Sitojun case 4: 32762587Sitojun if (sc->gif_psrc->sa_family != AF_INET || 32862587Sitojun sc->gif_pdst->sa_family != AF_INET) 32962587Sitojun return 0; 33062587Sitojun return gif_encapcheck4(m, off, proto, arg); 33162587Sitojun#endif 33262587Sitojun#ifdef INET6 33362587Sitojun case 6: 334105293Sume if (m->m_pkthdr.len < sizeof(struct ip6_hdr)) 335105293Sume return 0; 33662587Sitojun if (sc->gif_psrc->sa_family != AF_INET6 || 33762587Sitojun sc->gif_pdst->sa_family != AF_INET6) 33862587Sitojun return 0; 33962587Sitojun return gif_encapcheck6(m, off, proto, arg); 34062587Sitojun#endif 34162587Sitojun default: 34262587Sitojun return 0; 34362587Sitojun } 34462587Sitojun} 345236951Srrs#ifdef INET 346236951Srrs#define GIF_HDR_LEN (ETHER_HDR_LEN + sizeof (struct ip)) 347236951Srrs#endif 348236951Srrs#ifdef INET6 349236951Srrs#define GIF_HDR_LEN6 (ETHER_HDR_LEN + sizeof (struct ip6_hdr)) 350236951Srrs#endif 35162587Sitojun 352153621Sthompsastatic void 353153621Sthompsagif_start(struct ifnet *ifp) 354153621Sthompsa{ 355153621Sthompsa struct gif_softc *sc; 356153621Sthompsa struct mbuf *m; 357236951Srrs uint32_t af; 358236951Srrs int error = 0; 359153621Sthompsa 360153621Sthompsa sc = ifp->if_softc; 361236951Srrs GIF_LOCK(sc); 362236951Srrs ifp->if_drv_flags |= IFF_DRV_OACTIVE; 363236951Srrs while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) { 364153621Sthompsa 365236951Srrs IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 366153621Sthompsa if (m == 0) 367153621Sthompsa break; 368153621Sthompsa 369236951Srrs#ifdef ALTQ 370236951Srrs /* Take out those altq bytes we add in gif_output */ 371236951Srrs#ifdef INET 372236951Srrs if (sc->gif_psrc->sa_family == AF_INET) 373236951Srrs m->m_pkthdr.len -= GIF_HDR_LEN; 374236951Srrs#endif 375236951Srrs#ifdef INET6 376236951Srrs if (sc->gif_psrc->sa_family == AF_INET6) 377236951Srrs m->m_pkthdr.len -= GIF_HDR_LEN6; 378236951Srrs#endif 379236951Srrs#endif 380236957Srrs /* 381236957Srrs * Now pull back the af that we 382236957Srrs * stashed in the csum_data. 383236951Srrs */ 384236955Srrs af = m->m_pkthdr.csum_data; 385236955Srrs 386236951Srrs if (ifp->if_bridge) 387236951Srrs af = AF_LINK; 388153621Sthompsa 389236951Srrs BPF_MTAP2(ifp, &af, sizeof(af), m); 390236951Srrs ifp->if_opackets++; 391236951Srrs 392236951Srrs/* Done by IFQ_HANDOFF */ 393236951Srrs/* ifp->if_obytes += m->m_pkthdr.len;*/ 394236951Srrs /* override to IPPROTO_ETHERIP for bridged traffic */ 395236951Srrs 396236951Srrs M_SETFIB(m, sc->gif_fibnum); 397236951Srrs /* inner AF-specific encapsulation */ 398236951Srrs /* XXX should we check if our outer source is legal? */ 399236951Srrs /* dispatch to output logic based on outer AF */ 400236951Srrs switch (sc->gif_psrc->sa_family) { 401236951Srrs#ifdef INET 402236951Srrs case AF_INET: 403236951Srrs error = in_gif_output(ifp, af, m); 404236951Srrs break; 405236951Srrs#endif 406236951Srrs#ifdef INET6 407236951Srrs case AF_INET6: 408236951Srrs error = in6_gif_output(ifp, af, m); 409236951Srrs break; 410236951Srrs#endif 411236951Srrs default: 412236951Srrs m_freem(m); 413236951Srrs error = ENETDOWN; 414236951Srrs } 415236951Srrs if (error) 416236951Srrs ifp->if_oerrors++; 417236951Srrs 418153621Sthompsa } 419153621Sthompsa ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 420236951Srrs GIF_UNLOCK(sc); 421153621Sthompsa return; 422153621Sthompsa} 423153621Sthompsa 42454263Sshinint 425249925Sglebiusgif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 426249925Sglebius struct route *ro) 42754263Sshin{ 428147256Sbrooks struct gif_softc *sc = ifp->if_softc; 429127898Sru struct m_tag *mtag; 43054263Sshin int error = 0; 431127898Sru int gif_called; 432236951Srrs uint32_t af; 433101182Srwatson#ifdef MAC 434172930Srwatson error = mac_ifnet_check_transmit(ifp, m); 435101739Srwatson if (error) { 436101739Srwatson m_freem(m); 437101739Srwatson goto end; 438101739Srwatson } 439101182Srwatson#endif 440253261Shrs if ((ifp->if_flags & IFF_MONITOR) != 0) { 441253261Shrs error = ENETDOWN; 442253261Shrs m_freem(m); 443253261Shrs goto end; 444253261Shrs } 445101182Srwatson 44654263Sshin /* 44754263Sshin * gif may cause infinite recursion calls when misconfigured. 448127898Sru * We'll prevent this by detecting loops. 449127898Sru * 450127898Sru * High nesting level may cause stack exhaustion. 45154263Sshin * We'll prevent this by introducing upper limit. 45254263Sshin */ 453127898Sru gif_called = 1; 454127898Sru mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, NULL); 455127898Sru while (mtag != NULL) { 456127898Sru if (*(struct ifnet **)(mtag + 1) == ifp) { 457127898Sru log(LOG_NOTICE, 458127898Sru "gif_output: loop detected on %s\n", 459127898Sru (*(struct ifnet **)(mtag + 1))->if_xname); 460127898Sru m_freem(m); 461127898Sru error = EIO; /* is there better errno? */ 462127898Sru goto end; 463127898Sru } 464127898Sru mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, mtag); 465127898Sru gif_called++; 466127898Sru } 467181803Sbz if (gif_called > V_max_gif_nesting) { 46854263Sshin log(LOG_NOTICE, 46954263Sshin "gif_output: recursively called too many times(%d)\n", 470127303Srwatson gif_called); 47154263Sshin m_freem(m); 47254263Sshin error = EIO; /* is there better errno? */ 47354263Sshin goto end; 47454263Sshin } 475127898Sru mtag = m_tag_alloc(MTAG_GIF, MTAG_GIF_CALLED, sizeof(struct ifnet *), 476127898Sru M_NOWAIT); 477127898Sru if (mtag == NULL) { 478127898Sru m_freem(m); 479127898Sru error = ENOMEM; 480127898Sru goto end; 481127898Sru } 482127898Sru *(struct ifnet **)(mtag + 1) = ifp; 483127898Sru m_tag_prepend(m, mtag); 48462587Sitojun 48554263Sshin m->m_flags &= ~(M_BCAST|M_MCAST); 486236951Srrs /* BPF writes need to be handled specially. */ 487249925Sglebius if (dst->sa_family == AF_UNSPEC) 488236951Srrs bcopy(dst->sa_data, &af, sizeof(af)); 489249925Sglebius else 490249925Sglebius af = dst->sa_family; 491236957Srrs /* 492236957Srrs * Now save the af in the inbound pkt csum 493236957Srrs * data, this is a cheat since we are using 494236957Srrs * the inbound csum_data field to carry the 495236957Srrs * af over to the gif_start() routine, avoiding 496236957Srrs * using yet another mtag. 497236951Srrs */ 498236955Srrs m->m_pkthdr.csum_data = af; 49954263Sshin if (!(ifp->if_flags & IFF_UP) || 50054263Sshin sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 50154263Sshin m_freem(m); 50254263Sshin error = ENETDOWN; 50354263Sshin goto end; 50454263Sshin } 505236951Srrs#ifdef ALTQ 506236957Srrs /* 507236957Srrs * Make altq aware of the bytes we will add 508236951Srrs * when we actually send it. 509236951Srrs */ 51054263Sshin#ifdef INET 511236951Srrs if (sc->gif_psrc->sa_family == AF_INET) 512236951Srrs m->m_pkthdr.len += GIF_HDR_LEN; 51354263Sshin#endif 51454263Sshin#ifdef INET6 515236951Srrs if (sc->gif_psrc->sa_family == AF_INET6) 516236951Srrs m->m_pkthdr.len += GIF_HDR_LEN6; 51754263Sshin#endif 518236951Srrs#endif 519236951Srrs /* 520236951Srrs * Queue message on interface, update output statistics if 521236951Srrs * successful, and start output if interface not yet active. 522236951Srrs */ 523236951Srrs IFQ_HANDOFF(ifp, m, error); 52454263Sshin end: 52578064Sume if (error) 52678064Sume ifp->if_oerrors++; 527155037Sglebius return (error); 52854263Sshin} 52954263Sshin 53054263Sshinvoid 531105338Sumegif_input(m, af, ifp) 53254263Sshin struct mbuf *m; 53354263Sshin int af; 534105338Sume struct ifnet *ifp; 53554263Sshin{ 536153621Sthompsa int isr, n; 537198357Sbrueffer struct gif_softc *sc; 538153621Sthompsa struct etherip_header *eip; 539176879Sthompsa struct ether_header *eh; 540176879Sthompsa struct ifnet *oldifp; 54154263Sshin 542105338Sume if (ifp == NULL) { 54354263Sshin /* just in case */ 54454263Sshin m_freem(m); 54554263Sshin return; 54654263Sshin } 547198357Sbrueffer sc = ifp->if_softc; 548105338Sume m->m_pkthdr.rcvif = ifp; 549101182Srwatson 550101182Srwatson#ifdef MAC 551172930Srwatson mac_ifnet_create_mbuf(ifp, m); 552101182Srwatson#endif 553101182Srwatson 554159180Scsjp if (bpf_peers_present(ifp->if_bpf)) { 55578064Sume u_int32_t af1 = af; 556123922Ssam bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m); 55754263Sshin } 55854263Sshin 559253261Shrs if ((ifp->if_flags & IFF_MONITOR) != 0) { 560253261Shrs ifp->if_ipackets++; 561253261Shrs ifp->if_ibytes += m->m_pkthdr.len; 562253261Shrs m_freem(m); 563253261Shrs return; 564253261Shrs } 565253261Shrs 56683998Sbrooks if (ng_gif_input_p != NULL) { 567105338Sume (*ng_gif_input_p)(ifp, &m, af); 56883998Sbrooks if (m == NULL) 56983998Sbrooks return; 57083998Sbrooks } 57183998Sbrooks 57254263Sshin /* 57354263Sshin * Put the packet to the network layer input queue according to the 57454263Sshin * specified address family. 57554263Sshin * Note: older versions of gif_input directly called network layer 57695023Ssuz * input functions, e.g. ip6_input, here. We changed the policy to 57754263Sshin * prevent too many recursive calls of such input functions, which 57895023Ssuz * might cause kernel panic. But the change may introduce another 57954263Sshin * problem; if the input queue is full, packets are discarded. 58095023Ssuz * The kernel stack overflow really happened, and we believed 58195023Ssuz * queue-full rarely occurs, so we changed the policy. 58254263Sshin */ 58354263Sshin switch (af) { 58454263Sshin#ifdef INET 58554263Sshin case AF_INET: 58654263Sshin isr = NETISR_IP; 58754263Sshin break; 58854263Sshin#endif 58954263Sshin#ifdef INET6 59054263Sshin case AF_INET6: 59154263Sshin isr = NETISR_IPV6; 59254263Sshin break; 59354263Sshin#endif 594153621Sthompsa case AF_LINK: 595153621Sthompsa n = sizeof(struct etherip_header) + sizeof(struct ether_header); 596153621Sthompsa if (n > m->m_len) { 597153621Sthompsa m = m_pullup(m, n); 598153621Sthompsa if (m == NULL) { 599153621Sthompsa ifp->if_ierrors++; 600153621Sthompsa return; 601153621Sthompsa } 602153621Sthompsa } 603153621Sthompsa 604153621Sthompsa eip = mtod(m, struct etherip_header *); 605193664Shrs /* 606193664Shrs * GIF_ACCEPT_REVETHIP (enabled by default) intentionally 607193664Shrs * accepts an EtherIP packet with revered version field in 608193664Shrs * the header. This is a knob for backward compatibility 609193664Shrs * with FreeBSD 7.2R or prior. 610193664Shrs */ 611193664Shrs if (sc->gif_options & GIF_ACCEPT_REVETHIP) { 612193664Shrs if (eip->eip_resvl != ETHERIP_VERSION 613193664Shrs && eip->eip_ver != ETHERIP_VERSION) { 614193664Shrs /* discard unknown versions */ 615193664Shrs m_freem(m); 616193664Shrs return; 617193664Shrs } 618193664Shrs } else { 619193664Shrs if (eip->eip_ver != ETHERIP_VERSION) { 620193664Shrs /* discard unknown versions */ 621193664Shrs m_freem(m); 622193664Shrs return; 623193664Shrs } 624153621Sthompsa } 625153621Sthompsa m_adj(m, sizeof(struct etherip_header)); 626153621Sthompsa 627153621Sthompsa m->m_flags &= ~(M_BCAST|M_MCAST); 628153621Sthompsa m->m_pkthdr.rcvif = ifp; 629153621Sthompsa 630176879Sthompsa if (ifp->if_bridge) { 631176879Sthompsa oldifp = ifp; 632176879Sthompsa eh = mtod(m, struct ether_header *); 633176879Sthompsa if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 634176879Sthompsa if (ETHER_IS_BROADCAST(eh->ether_dhost)) 635176879Sthompsa m->m_flags |= M_BCAST; 636176879Sthompsa else 637176879Sthompsa m->m_flags |= M_MCAST; 638176879Sthompsa ifp->if_imcasts++; 639176879Sthompsa } 640153621Sthompsa BRIDGE_INPUT(ifp, m); 641176879Sthompsa 642176879Sthompsa if (m != NULL && ifp != oldifp) { 643176879Sthompsa /* 644176879Sthompsa * The bridge gave us back itself or one of the 645176879Sthompsa * members for which the frame is addressed. 646176879Sthompsa */ 647176879Sthompsa ether_demux(ifp, m); 648176879Sthompsa return; 649176879Sthompsa } 650176879Sthompsa } 651153621Sthompsa if (m != NULL) 652153621Sthompsa m_freem(m); 653153621Sthompsa return; 654153621Sthompsa 65554263Sshin default: 65683998Sbrooks if (ng_gif_input_orphan_p != NULL) 657105338Sume (*ng_gif_input_orphan_p)(ifp, m, af); 65883998Sbrooks else 65983998Sbrooks m_freem(m); 66054263Sshin return; 66154263Sshin } 66254263Sshin 663105338Sume ifp->if_ipackets++; 664105338Sume ifp->if_ibytes += m->m_pkthdr.len; 665223741Sbz M_SETFIB(m, ifp->if_fib); 666111888Sjlemon netisr_dispatch(isr, m); 66754263Sshin} 66854263Sshin 66962587Sitojun/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 67054263Sshinint 67154263Sshingif_ioctl(ifp, cmd, data) 67254263Sshin struct ifnet *ifp; 67354263Sshin u_long cmd; 67454263Sshin caddr_t data; 67554263Sshin{ 676147256Sbrooks struct gif_softc *sc = ifp->if_softc; 67754263Sshin struct ifreq *ifr = (struct ifreq*)data; 67854263Sshin int error = 0, size; 679193664Shrs u_int options; 68062587Sitojun struct sockaddr *dst, *src; 681105339Sume#ifdef SIOCSIFMTU /* xxx */ 682105339Sume u_long mtu; 683105339Sume#endif 684105339Sume 68554263Sshin switch (cmd) { 68654263Sshin case SIOCSIFADDR: 687105293Sume ifp->if_flags |= IFF_UP; 68854263Sshin break; 68962587Sitojun 69054263Sshin case SIOCADDMULTI: 69154263Sshin case SIOCDELMULTI: 69254263Sshin break; 69354263Sshin 69462587Sitojun#ifdef SIOCSIFMTU /* xxx */ 69554263Sshin case SIOCGIFMTU: 69654263Sshin break; 69762587Sitojun 69854263Sshin case SIOCSIFMTU: 699105339Sume mtu = ifr->ifr_mtu; 700105339Sume if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) 701105339Sume return (EINVAL); 702105339Sume ifp->if_mtu = mtu; 70354263Sshin break; 70462587Sitojun#endif /* SIOCSIFMTU */ 70554263Sshin 706105339Sume#ifdef INET 70754263Sshin case SIOCSIFPHYADDR: 708105339Sume#endif 70954263Sshin#ifdef INET6 71054263Sshin case SIOCSIFPHYADDR_IN6: 71154263Sshin#endif /* INET6 */ 71278064Sume case SIOCSLIFPHYADDR: 71362587Sitojun switch (cmd) { 71478064Sume#ifdef INET 71562587Sitojun case SIOCSIFPHYADDR: 71654263Sshin src = (struct sockaddr *) 71754263Sshin &(((struct in_aliasreq *)data)->ifra_addr); 71854263Sshin dst = (struct sockaddr *) 71954263Sshin &(((struct in_aliasreq *)data)->ifra_dstaddr); 72062587Sitojun break; 72178064Sume#endif 72262587Sitojun#ifdef INET6 72362587Sitojun case SIOCSIFPHYADDR_IN6: 72462587Sitojun src = (struct sockaddr *) 72562587Sitojun &(((struct in6_aliasreq *)data)->ifra_addr); 72662587Sitojun dst = (struct sockaddr *) 72762587Sitojun &(((struct in6_aliasreq *)data)->ifra_dstaddr); 72862587Sitojun break; 72962587Sitojun#endif 73078064Sume case SIOCSLIFPHYADDR: 73178064Sume src = (struct sockaddr *) 73278064Sume &(((struct if_laddrreq *)data)->addr); 73378064Sume dst = (struct sockaddr *) 73478064Sume &(((struct if_laddrreq *)data)->dstaddr); 735105293Sume break; 73691327Sbrooks default: 737105293Sume return EINVAL; 73862587Sitojun } 73954263Sshin 74078064Sume /* sa_family must be equal */ 74178064Sume if (src->sa_family != dst->sa_family) 74278064Sume return EINVAL; 74378064Sume 74478064Sume /* validate sa_len */ 74578064Sume switch (src->sa_family) { 74678064Sume#ifdef INET 74778064Sume case AF_INET: 74878064Sume if (src->sa_len != sizeof(struct sockaddr_in)) 74978064Sume return EINVAL; 75078064Sume break; 75178064Sume#endif 75278064Sume#ifdef INET6 75378064Sume case AF_INET6: 75478064Sume if (src->sa_len != sizeof(struct sockaddr_in6)) 75578064Sume return EINVAL; 75678064Sume break; 75778064Sume#endif 75878064Sume default: 75978064Sume return EAFNOSUPPORT; 76078064Sume } 76178064Sume switch (dst->sa_family) { 76278064Sume#ifdef INET 76378064Sume case AF_INET: 76478064Sume if (dst->sa_len != sizeof(struct sockaddr_in)) 76578064Sume return EINVAL; 76678064Sume break; 76778064Sume#endif 76878064Sume#ifdef INET6 76978064Sume case AF_INET6: 77078064Sume if (dst->sa_len != sizeof(struct sockaddr_in6)) 77178064Sume return EINVAL; 77278064Sume break; 77378064Sume#endif 77478064Sume default: 77578064Sume return EAFNOSUPPORT; 77678064Sume } 77778064Sume 77878064Sume /* check sa_family looks sane for the cmd */ 77978064Sume switch (cmd) { 78078064Sume case SIOCSIFPHYADDR: 78178064Sume if (src->sa_family == AF_INET) 78278064Sume break; 78378064Sume return EAFNOSUPPORT; 78478064Sume#ifdef INET6 78578064Sume case SIOCSIFPHYADDR_IN6: 78678064Sume if (src->sa_family == AF_INET6) 78778064Sume break; 78878064Sume return EAFNOSUPPORT; 78978064Sume#endif /* INET6 */ 79078064Sume case SIOCSLIFPHYADDR: 79178064Sume /* checks done in the above */ 79278064Sume break; 79378064Sume } 79478064Sume 795147256Sbrooks error = gif_set_tunnel(GIF2IFP(sc), src, dst); 79662587Sitojun break; 79762587Sitojun 79862587Sitojun#ifdef SIOCDIFPHYADDR 79962587Sitojun case SIOCDIFPHYADDR: 800147256Sbrooks gif_delete_tunnel(GIF2IFP(sc)); 80154263Sshin break; 80262587Sitojun#endif 80362587Sitojun 80454263Sshin case SIOCGIFPSRCADDR: 80554263Sshin#ifdef INET6 80654263Sshin case SIOCGIFPSRCADDR_IN6: 80754263Sshin#endif /* INET6 */ 80854263Sshin if (sc->gif_psrc == NULL) { 80954263Sshin error = EADDRNOTAVAIL; 81054263Sshin goto bad; 81154263Sshin } 81254263Sshin src = sc->gif_psrc; 81378064Sume switch (cmd) { 81454263Sshin#ifdef INET 81578064Sume case SIOCGIFPSRCADDR: 81654263Sshin dst = &ifr->ifr_addr; 81778064Sume size = sizeof(ifr->ifr_addr); 81854263Sshin break; 81954263Sshin#endif /* INET */ 82054263Sshin#ifdef INET6 82178064Sume case SIOCGIFPSRCADDR_IN6: 82254263Sshin dst = (struct sockaddr *) 82354263Sshin &(((struct in6_ifreq *)data)->ifr_addr); 82478064Sume size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 82554263Sshin break; 82654263Sshin#endif /* INET6 */ 82754263Sshin default: 82854263Sshin error = EADDRNOTAVAIL; 82954263Sshin goto bad; 83054263Sshin } 83178064Sume if (src->sa_len > size) 83278064Sume return EINVAL; 83378064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 834148385Sume#ifdef INET6 835148385Sume if (dst->sa_family == AF_INET6) { 836148385Sume error = sa6_recoverscope((struct sockaddr_in6 *)dst); 837148385Sume if (error != 0) 838148385Sume return (error); 839148385Sume } 840148385Sume#endif 84154263Sshin break; 84262587Sitojun 84354263Sshin case SIOCGIFPDSTADDR: 84454263Sshin#ifdef INET6 84554263Sshin case SIOCGIFPDSTADDR_IN6: 84654263Sshin#endif /* INET6 */ 84754263Sshin if (sc->gif_pdst == NULL) { 84854263Sshin error = EADDRNOTAVAIL; 84954263Sshin goto bad; 85054263Sshin } 85154263Sshin src = sc->gif_pdst; 85278064Sume switch (cmd) { 85354263Sshin#ifdef INET 85478064Sume case SIOCGIFPDSTADDR: 85554263Sshin dst = &ifr->ifr_addr; 85678064Sume size = sizeof(ifr->ifr_addr); 85754263Sshin break; 85854263Sshin#endif /* INET */ 85954263Sshin#ifdef INET6 86078064Sume case SIOCGIFPDSTADDR_IN6: 86154263Sshin dst = (struct sockaddr *) 86254263Sshin &(((struct in6_ifreq *)data)->ifr_addr); 86378064Sume size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 86454263Sshin break; 86554263Sshin#endif /* INET6 */ 86654263Sshin default: 86754263Sshin error = EADDRNOTAVAIL; 86854263Sshin goto bad; 86954263Sshin } 87078064Sume if (src->sa_len > size) 87178064Sume return EINVAL; 872219206Sbz error = prison_if(curthread->td_ucred, src); 873219206Sbz if (error != 0) 874219206Sbz return (error); 875219206Sbz error = prison_if(curthread->td_ucred, dst); 876219206Sbz if (error != 0) 877219206Sbz return (error); 87878064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 879148385Sume#ifdef INET6 880148385Sume if (dst->sa_family == AF_INET6) { 881148385Sume error = sa6_recoverscope((struct sockaddr_in6 *)dst); 882148385Sume if (error != 0) 883148385Sume return (error); 884148385Sume } 885148385Sume#endif 88654263Sshin break; 88754263Sshin 88878064Sume case SIOCGLIFPHYADDR: 88978064Sume if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 89078064Sume error = EADDRNOTAVAIL; 89178064Sume goto bad; 89278064Sume } 89378064Sume 89478064Sume /* copy src */ 89578064Sume src = sc->gif_psrc; 89678064Sume dst = (struct sockaddr *) 89778064Sume &(((struct if_laddrreq *)data)->addr); 89878064Sume size = sizeof(((struct if_laddrreq *)data)->addr); 89978064Sume if (src->sa_len > size) 90078064Sume return EINVAL; 90178064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 90278064Sume 90378064Sume /* copy dst */ 90478064Sume src = sc->gif_pdst; 90578064Sume dst = (struct sockaddr *) 90678064Sume &(((struct if_laddrreq *)data)->dstaddr); 90778064Sume size = sizeof(((struct if_laddrreq *)data)->dstaddr); 90878064Sume if (src->sa_len > size) 90978064Sume return EINVAL; 91078064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 91178064Sume break; 91278064Sume 91354263Sshin case SIOCSIFFLAGS: 91462587Sitojun /* if_ioctl() takes care of it */ 91554263Sshin break; 91654263Sshin 917193664Shrs case GIFGOPTS: 918193664Shrs options = sc->gif_options; 919193664Shrs error = copyout(&options, ifr->ifr_data, 920193664Shrs sizeof(options)); 921193664Shrs break; 922193664Shrs 923193664Shrs case GIFSOPTS: 924193664Shrs if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0) 925193664Shrs break; 926193815Shrs error = copyin(ifr->ifr_data, &options, sizeof(options)); 927193815Shrs if (error) 928193815Shrs break; 929193815Shrs if (options & ~GIF_OPTMASK) 930193815Shrs error = EINVAL; 931193815Shrs else 932193815Shrs sc->gif_options = options; 933193664Shrs break; 934193664Shrs 93554263Sshin default: 93654263Sshin error = EINVAL; 93754263Sshin break; 93854263Sshin } 93954263Sshin bad: 94054263Sshin return error; 94154263Sshin} 94279106Sbrooks 943127305Srwatson/* 944127305Srwatson * XXXRW: There's a general event-ordering issue here: the code to check 945127305Srwatson * if a given tunnel is already present happens before we perform a 946127305Srwatson * potentially blocking setup of the tunnel. This code needs to be 947127305Srwatson * re-ordered so that the check and replacement can be atomic using 948127305Srwatson * a mutex. 949127305Srwatson */ 950105293Sumeint 951105293Sumegif_set_tunnel(ifp, src, dst) 952105293Sume struct ifnet *ifp; 953105293Sume struct sockaddr *src; 954105293Sume struct sockaddr *dst; 955105293Sume{ 956147256Sbrooks struct gif_softc *sc = ifp->if_softc; 957105293Sume struct gif_softc *sc2; 958105293Sume struct sockaddr *osrc, *odst, *sa; 959105293Sume int error = 0; 960105293Sume 961127305Srwatson mtx_lock(&gif_mtx); 962181803Sbz LIST_FOREACH(sc2, &V_gif_softc_list, gif_list) { 963105293Sume if (sc2 == sc) 964105293Sume continue; 965105293Sume if (!sc2->gif_pdst || !sc2->gif_psrc) 966105293Sume continue; 967105293Sume if (sc2->gif_pdst->sa_family != dst->sa_family || 968105293Sume sc2->gif_pdst->sa_len != dst->sa_len || 969105293Sume sc2->gif_psrc->sa_family != src->sa_family || 970105293Sume sc2->gif_psrc->sa_len != src->sa_len) 971105293Sume continue; 972105293Sume 973105293Sume /* 974105293Sume * Disallow parallel tunnels unless instructed 975105293Sume * otherwise. 976105293Sume */ 977181803Sbz if (!V_parallel_tunnels && 978105293Sume bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 979105293Sume bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 980105293Sume error = EADDRNOTAVAIL; 981127305Srwatson mtx_unlock(&gif_mtx); 982105293Sume goto bad; 983105293Sume } 984105293Sume 985105293Sume /* XXX both end must be valid? (I mean, not 0.0.0.0) */ 986105293Sume } 987127305Srwatson mtx_unlock(&gif_mtx); 988105293Sume 989105293Sume /* XXX we can detach from both, but be polite just in case */ 990105293Sume if (sc->gif_psrc) 991105293Sume switch (sc->gif_psrc->sa_family) { 992105293Sume#ifdef INET 993105293Sume case AF_INET: 994105293Sume (void)in_gif_detach(sc); 995105293Sume break; 996105293Sume#endif 997105293Sume#ifdef INET6 998105293Sume case AF_INET6: 999105293Sume (void)in6_gif_detach(sc); 1000105293Sume break; 1001105293Sume#endif 1002105293Sume } 1003105293Sume 1004105293Sume osrc = sc->gif_psrc; 1005111119Simp sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK); 1006105293Sume bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 1007105293Sume sc->gif_psrc = sa; 1008105293Sume 1009105293Sume odst = sc->gif_pdst; 1010111119Simp sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK); 1011105293Sume bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 1012105293Sume sc->gif_pdst = sa; 1013105293Sume 1014105293Sume switch (sc->gif_psrc->sa_family) { 1015105293Sume#ifdef INET 1016105293Sume case AF_INET: 1017105293Sume error = in_gif_attach(sc); 1018105293Sume break; 1019105293Sume#endif 1020105293Sume#ifdef INET6 1021105293Sume case AF_INET6: 1022148385Sume /* 1023148385Sume * Check validity of the scope zone ID of the addresses, and 1024148385Sume * convert it into the kernel internal form if necessary. 1025148385Sume */ 1026148385Sume error = sa6_embedscope((struct sockaddr_in6 *)sc->gif_psrc, 0); 1027148385Sume if (error != 0) 1028148385Sume break; 1029148385Sume error = sa6_embedscope((struct sockaddr_in6 *)sc->gif_pdst, 0); 1030148385Sume if (error != 0) 1031148385Sume break; 1032105293Sume error = in6_gif_attach(sc); 1033105293Sume break; 1034105293Sume#endif 1035105293Sume } 1036105293Sume if (error) { 1037105293Sume /* rollback */ 1038105293Sume free((caddr_t)sc->gif_psrc, M_IFADDR); 1039105293Sume free((caddr_t)sc->gif_pdst, M_IFADDR); 1040105293Sume sc->gif_psrc = osrc; 1041105293Sume sc->gif_pdst = odst; 1042105293Sume goto bad; 1043105293Sume } 1044105293Sume 1045105293Sume if (osrc) 1046105293Sume free((caddr_t)osrc, M_IFADDR); 1047105293Sume if (odst) 1048105293Sume free((caddr_t)odst, M_IFADDR); 1049105293Sume 1050105293Sume bad: 1051105293Sume if (sc->gif_psrc && sc->gif_pdst) 1052148887Srwatson ifp->if_drv_flags |= IFF_DRV_RUNNING; 1053105293Sume else 1054148887Srwatson ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1055105293Sume 1056105293Sume return error; 1057105293Sume} 1058105293Sume 105979106Sbrooksvoid 1060105293Sumegif_delete_tunnel(ifp) 1061105293Sume struct ifnet *ifp; 106279106Sbrooks{ 1063147256Sbrooks struct gif_softc *sc = ifp->if_softc; 106479106Sbrooks 106579106Sbrooks if (sc->gif_psrc) { 106679106Sbrooks free((caddr_t)sc->gif_psrc, M_IFADDR); 106779106Sbrooks sc->gif_psrc = NULL; 106879106Sbrooks } 106979106Sbrooks if (sc->gif_pdst) { 107079106Sbrooks free((caddr_t)sc->gif_pdst, M_IFADDR); 107179106Sbrooks sc->gif_pdst = NULL; 107279106Sbrooks } 1073105293Sume /* it is safe to detach from both */ 1074105293Sume#ifdef INET 1075105293Sume (void)in_gif_detach(sc); 1076105293Sume#endif 1077105293Sume#ifdef INET6 1078105293Sume (void)in6_gif_detach(sc); 1079105293Sume#endif 1080160018Syar ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 108179106Sbrooks} 1082