if_gif.c revision 236957
162587Sitojun/* $FreeBSD: head/sys/net/if_gif.c 236957 2012-06-12 13:31:32Z rrs $ */ 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 9179106Sbrooks#define 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 *); 10979106Sbrooks 110130933SbrooksIFC_SIMPLE_DECLARE(gif, 0); 11179106Sbrooks 11292725Salfredstatic int gifmodevent(module_t, int, void *); 11379106Sbrooks 11491270SbrooksSYSCTL_DECL(_net_link); 115227309Sedstatic SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0, 11691270Sbrooks "Generic Tunnel Interface"); 11762587Sitojun#ifndef MAX_GIF_NEST 11862587Sitojun/* 11991270Sbrooks * This macro controls the default upper limitation on nesting of gif tunnels. 12062587Sitojun * Since, setting a large value to this macro with a careless configuration 12162587Sitojun * may introduce system crash, we don't allow any nestings by default. 12262587Sitojun * If you need to configure nested gif tunnels, you can define this macro 12395023Ssuz * in your kernel configuration file. However, if you do so, please be 12462587Sitojun * careful to configure the tunnels so that it won't make a loop. 12562587Sitojun */ 12662587Sitojun#define MAX_GIF_NEST 1 12762587Sitojun#endif 128215701Sdimstatic VNET_DEFINE(int, max_gif_nesting) = MAX_GIF_NEST; 129195837Srwatson#define V_max_gif_nesting VNET(max_gif_nesting) 130195699SrwatsonSYSCTL_VNET_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_RW, 131195699Srwatson &VNET_NAME(max_gif_nesting), 0, "Max nested tunnels"); 13262587Sitojun 13391270Sbrooks/* 13491270Sbrooks * By default, we disallow creation of multiple tunnels between the same 13591270Sbrooks * pair of addresses. Some applications require this functionality so 13691270Sbrooks * we allow control over this check here. 13791270Sbrooks */ 138195837Srwatson#ifdef XBONEHACK 139215701Sdimstatic VNET_DEFINE(int, parallel_tunnels) = 1; 140195837Srwatson#else 141215701Sdimstatic VNET_DEFINE(int, parallel_tunnels) = 0; 142195837Srwatson#endif 143195837Srwatson#define V_parallel_tunnels VNET(parallel_tunnels) 144195699SrwatsonSYSCTL_VNET_INT(_net_link_gif, OID_AUTO, parallel_tunnels, CTLFLAG_RW, 145195699Srwatson &VNET_NAME(parallel_tunnels), 0, "Allow parallel tunnels?"); 14691270Sbrooks 147176879Sthompsa/* copy from src/sys/net/if_ethersubr.c */ 148176879Sthompsastatic const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 149176879Sthompsa { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 150176879Sthompsa#ifndef ETHER_IS_BROADCAST 151176879Sthompsa#define ETHER_IS_BROADCAST(addr) \ 152176879Sthompsa (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 153176879Sthompsa#endif 154176879Sthompsa 155128209Sbrooksstatic int 156160195Ssamgif_clone_create(ifc, unit, params) 15779106Sbrooks struct if_clone *ifc; 15892081Smux int unit; 159160195Ssam caddr_t params; 16054263Sshin{ 16178064Sume struct gif_softc *sc; 16254263Sshin 163131672Sbms sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO); 164178888Sjulian sc->gif_fibnum = curthread->td_proc->p_fibnum; 165147256Sbrooks GIF2IFP(sc) = if_alloc(IFT_GIF); 166147256Sbrooks if (GIF2IFP(sc) == NULL) { 167147256Sbrooks free(sc, M_GIF); 168147256Sbrooks return (ENOSPC); 169147256Sbrooks } 17079106Sbrooks 171155037Sglebius GIF_LOCK_INIT(sc); 172155037Sglebius 173147256Sbrooks GIF2IFP(sc)->if_softc = sc; 174147256Sbrooks if_initname(GIF2IFP(sc), ifc->ifc_name, unit); 17579106Sbrooks 17679106Sbrooks sc->encap_cookie4 = sc->encap_cookie6 = NULL; 177193664Shrs sc->gif_options = GIF_ACCEPT_REVETHIP; 17862587Sitojun 179147256Sbrooks GIF2IFP(sc)->if_addrlen = 0; 180147256Sbrooks GIF2IFP(sc)->if_mtu = GIF_MTU; 181147256Sbrooks GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 18278064Sume#if 0 18379106Sbrooks /* turn off ingress filter */ 184147256Sbrooks GIF2IFP(sc)->if_flags |= IFF_LINK2; 18578064Sume#endif 186147256Sbrooks GIF2IFP(sc)->if_ioctl = gif_ioctl; 187153621Sthompsa GIF2IFP(sc)->if_start = gif_start; 188147256Sbrooks GIF2IFP(sc)->if_output = gif_output; 189207554Ssobomax GIF2IFP(sc)->if_snd.ifq_maxlen = ifqmaxlen; 190147256Sbrooks if_attach(GIF2IFP(sc)); 191147611Sdwmalone bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t)); 19283998Sbrooks if (ng_gif_attach_p != NULL) 193147256Sbrooks (*ng_gif_attach_p)(GIF2IFP(sc)); 194155037Sglebius 195155037Sglebius mtx_lock(&gif_mtx); 196181803Sbz LIST_INSERT_HEAD(&V_gif_softc_list, sc, gif_list); 197155037Sglebius mtx_unlock(&gif_mtx); 198155037Sglebius 199155037Sglebius return (0); 20079106Sbrooks} 20179106Sbrooks 202127305Srwatsonstatic void 203151266Sthompsagif_clone_destroy(ifp) 204151266Sthompsa struct ifnet *ifp; 20579106Sbrooks{ 206184678Sbz#if defined(INET) || defined(INET6) 20779106Sbrooks int err; 208184678Sbz#endif 209151266Sthompsa struct gif_softc *sc = ifp->if_softc; 21079106Sbrooks 211151266Sthompsa mtx_lock(&gif_mtx); 212151266Sthompsa LIST_REMOVE(sc, gif_list); 213151266Sthompsa mtx_unlock(&gif_mtx); 214151266Sthompsa 215127305Srwatson gif_delete_tunnel(ifp); 216105293Sume#ifdef INET6 217105293Sume if (sc->encap_cookie6 != NULL) { 218105293Sume err = encap_detach(sc->encap_cookie6); 219105293Sume KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 220105293Sume } 221105293Sume#endif 222105293Sume#ifdef INET 22379106Sbrooks if (sc->encap_cookie4 != NULL) { 22479106Sbrooks err = encap_detach(sc->encap_cookie4); 22579106Sbrooks KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 22679106Sbrooks } 227105293Sume#endif 22879106Sbrooks 22983998Sbrooks if (ng_gif_detach_p != NULL) 23083998Sbrooks (*ng_gif_detach_p)(ifp); 23179106Sbrooks bpfdetach(ifp); 23279106Sbrooks if_detach(ifp); 233147256Sbrooks if_free(ifp); 23479106Sbrooks 235155037Sglebius GIF_LOCK_DESTROY(sc); 236155037Sglebius 23779106Sbrooks free(sc, M_GIF); 23879106Sbrooks} 23979106Sbrooks 240195837Srwatsonstatic void 241195837Srwatsonvnet_gif_init(const void *unused __unused) 242190787Szec{ 243190787Szec 244190787Szec LIST_INIT(&V_gif_softc_list); 245190787Szec} 246195837SrwatsonVNET_SYSINIT(vnet_gif_init, SI_SUB_PSEUDO, SI_ORDER_MIDDLE, vnet_gif_init, 247195837Srwatson NULL); 248190787Szec 249190787Szecstatic int 25079106Sbrooksgifmodevent(mod, type, data) 25179106Sbrooks module_t mod; 25279106Sbrooks int type; 25379106Sbrooks void *data; 25479106Sbrooks{ 25579106Sbrooks 25679106Sbrooks switch (type) { 25779106Sbrooks case MOD_LOAD: 258127305Srwatson mtx_init(&gif_mtx, "gif_mtx", NULL, MTX_DEF); 259185088Szec if_clone_attach(&gif_cloner); 260195837Srwatson break; 26179106Sbrooks 26279106Sbrooks case MOD_UNLOAD: 26379106Sbrooks 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, 27579106Sbrooks 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 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 363236951Srrs /* Already active */ 364236951Srrs ifp->if_drv_flags |= IFF_GIF_WANTED; 365236951Srrs GIF_UNLOCK(sc); 366236951Srrs return; 367236951Srrs } 368236951Srrs ifp->if_drv_flags |= IFF_DRV_OACTIVE; 369236951Srrs GIF_UNLOCK(sc); 370236951Srrskeep_going: 371236951Srrs while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) { 372153621Sthompsa 373236951Srrs IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 374153621Sthompsa if (m == 0) 375153621Sthompsa break; 376153621Sthompsa 377236951Srrs#ifdef ALTQ 378236951Srrs /* Take out those altq bytes we add in gif_output */ 379236951Srrs#ifdef INET 380236951Srrs if (sc->gif_psrc->sa_family == AF_INET) 381236951Srrs m->m_pkthdr.len -= GIF_HDR_LEN; 382236951Srrs#endif 383236951Srrs#ifdef INET6 384236951Srrs if (sc->gif_psrc->sa_family == AF_INET6) 385236951Srrs m->m_pkthdr.len -= GIF_HDR_LEN6; 386236951Srrs#endif 387236951Srrs#endif 388236957Srrs /* 389236957Srrs * Now pull back the af that we 390236957Srrs * stashed in the csum_data. 391236951Srrs */ 392236955Srrs af = m->m_pkthdr.csum_data; 393236955Srrs 394236951Srrs if (ifp->if_bridge) 395236951Srrs af = AF_LINK; 396153621Sthompsa 397236951Srrs BPF_MTAP2(ifp, &af, sizeof(af), m); 398236951Srrs ifp->if_opackets++; 399236951Srrs 400236951Srrs/* Done by IFQ_HANDOFF */ 401236951Srrs/* ifp->if_obytes += m->m_pkthdr.len;*/ 402236951Srrs /* override to IPPROTO_ETHERIP for bridged traffic */ 403236951Srrs 404236951Srrs M_SETFIB(m, sc->gif_fibnum); 405236951Srrs /* inner AF-specific encapsulation */ 406236951Srrs /* XXX should we check if our outer source is legal? */ 407236951Srrs /* dispatch to output logic based on outer AF */ 408236951Srrs switch (sc->gif_psrc->sa_family) { 409236951Srrs#ifdef INET 410236951Srrs case AF_INET: 411236951Srrs error = in_gif_output(ifp, af, m); 412236951Srrs break; 413236951Srrs#endif 414236951Srrs#ifdef INET6 415236951Srrs case AF_INET6: 416236951Srrs error = in6_gif_output(ifp, af, m); 417236951Srrs break; 418236951Srrs#endif 419236951Srrs default: 420236951Srrs m_freem(m); 421236951Srrs error = ENETDOWN; 422236951Srrs } 423236951Srrs if (error) 424236951Srrs ifp->if_oerrors++; 425236951Srrs 426153621Sthompsa } 427236951Srrs GIF_LOCK(sc); 428236951Srrs if (ifp->if_drv_flags & IFF_GIF_WANTED) { 429236951Srrs /* Someone did a start while 430236951Srrs * we were unlocked and processing 431236951Srrs * lets clear the flag and try again. 432236951Srrs */ 433236951Srrs ifp->if_drv_flags &= ~IFF_GIF_WANTED; 434236951Srrs GIF_UNLOCK(sc); 435236951Srrs goto keep_going; 436236951Srrs } 437153621Sthompsa ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 438236951Srrs GIF_UNLOCK(sc); 439153621Sthompsa return; 440153621Sthompsa} 441153621Sthompsa 44254263Sshinint 443191148Skmacygif_output(ifp, m, dst, ro) 44454263Sshin struct ifnet *ifp; 44554263Sshin struct mbuf *m; 44654263Sshin struct sockaddr *dst; 447191148Skmacy struct route *ro; 44854263Sshin{ 449147256Sbrooks struct gif_softc *sc = ifp->if_softc; 450127898Sru struct m_tag *mtag; 45154263Sshin int error = 0; 452127898Sru int gif_called; 453236951Srrs uint32_t af; 454101182Srwatson#ifdef MAC 455172930Srwatson error = mac_ifnet_check_transmit(ifp, m); 456101739Srwatson if (error) { 457101739Srwatson m_freem(m); 458101739Srwatson goto end; 459101739Srwatson } 460101182Srwatson#endif 461101182Srwatson 46254263Sshin /* 46354263Sshin * gif may cause infinite recursion calls when misconfigured. 464127898Sru * We'll prevent this by detecting loops. 465127898Sru * 466127898Sru * High nesting level may cause stack exhaustion. 46754263Sshin * We'll prevent this by introducing upper limit. 46854263Sshin */ 469127898Sru gif_called = 1; 470127898Sru mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, NULL); 471127898Sru while (mtag != NULL) { 472127898Sru if (*(struct ifnet **)(mtag + 1) == ifp) { 473127898Sru log(LOG_NOTICE, 474127898Sru "gif_output: loop detected on %s\n", 475127898Sru (*(struct ifnet **)(mtag + 1))->if_xname); 476127898Sru m_freem(m); 477127898Sru error = EIO; /* is there better errno? */ 478127898Sru goto end; 479127898Sru } 480127898Sru mtag = m_tag_locate(m, MTAG_GIF, MTAG_GIF_CALLED, mtag); 481127898Sru gif_called++; 482127898Sru } 483181803Sbz if (gif_called > V_max_gif_nesting) { 48454263Sshin log(LOG_NOTICE, 48554263Sshin "gif_output: recursively called too many times(%d)\n", 486127303Srwatson gif_called); 48754263Sshin m_freem(m); 48854263Sshin error = EIO; /* is there better errno? */ 48954263Sshin goto end; 49054263Sshin } 491127898Sru mtag = m_tag_alloc(MTAG_GIF, MTAG_GIF_CALLED, sizeof(struct ifnet *), 492127898Sru M_NOWAIT); 493127898Sru if (mtag == NULL) { 494127898Sru m_freem(m); 495127898Sru error = ENOMEM; 496127898Sru goto end; 497127898Sru } 498127898Sru *(struct ifnet **)(mtag + 1) = ifp; 499127898Sru m_tag_prepend(m, mtag); 50062587Sitojun 50154263Sshin m->m_flags &= ~(M_BCAST|M_MCAST); 502236951Srrs /* BPF writes need to be handled specially. */ 503236951Srrs if (dst->sa_family == AF_UNSPEC) { 504236951Srrs bcopy(dst->sa_data, &af, sizeof(af)); 505236951Srrs dst->sa_family = af; 506236951Srrs } 507236951Srrs af = dst->sa_family; 508236957Srrs /* 509236957Srrs * Now save the af in the inbound pkt csum 510236957Srrs * data, this is a cheat since we are using 511236957Srrs * the inbound csum_data field to carry the 512236957Srrs * af over to the gif_start() routine, avoiding 513236957Srrs * using yet another mtag. 514236951Srrs */ 515236955Srrs m->m_pkthdr.csum_data = af; 51654263Sshin if (!(ifp->if_flags & IFF_UP) || 51754263Sshin sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 51854263Sshin m_freem(m); 51954263Sshin error = ENETDOWN; 52054263Sshin goto end; 52154263Sshin } 522236951Srrs#ifdef ALTQ 523236957Srrs /* 524236957Srrs * Make altq aware of the bytes we will add 525236951Srrs * when we actually send it. 526236951Srrs */ 52754263Sshin#ifdef INET 528236951Srrs if (sc->gif_psrc->sa_family == AF_INET) 529236951Srrs m->m_pkthdr.len += GIF_HDR_LEN; 53054263Sshin#endif 53154263Sshin#ifdef INET6 532236951Srrs if (sc->gif_psrc->sa_family == AF_INET6) 533236951Srrs m->m_pkthdr.len += GIF_HDR_LEN6; 53454263Sshin#endif 535236951Srrs#endif 536236951Srrs /* 537236951Srrs * Queue message on interface, update output statistics if 538236951Srrs * successful, and start output if interface not yet active. 539236951Srrs */ 540236951Srrs IFQ_HANDOFF(ifp, m, error); 54154263Sshin end: 54278064Sume if (error) 54378064Sume ifp->if_oerrors++; 544155037Sglebius return (error); 54554263Sshin} 54654263Sshin 54754263Sshinvoid 548105338Sumegif_input(m, af, ifp) 54954263Sshin struct mbuf *m; 55054263Sshin int af; 551105338Sume struct ifnet *ifp; 55254263Sshin{ 553153621Sthompsa int isr, n; 554198357Sbrueffer struct gif_softc *sc; 555153621Sthompsa struct etherip_header *eip; 556176879Sthompsa struct ether_header *eh; 557176879Sthompsa struct ifnet *oldifp; 55854263Sshin 559105338Sume if (ifp == NULL) { 56054263Sshin /* just in case */ 56154263Sshin m_freem(m); 56254263Sshin return; 56354263Sshin } 564198357Sbrueffer sc = ifp->if_softc; 565105338Sume m->m_pkthdr.rcvif = ifp; 566101182Srwatson 567101182Srwatson#ifdef MAC 568172930Srwatson mac_ifnet_create_mbuf(ifp, m); 569101182Srwatson#endif 570101182Srwatson 571159180Scsjp if (bpf_peers_present(ifp->if_bpf)) { 57278064Sume u_int32_t af1 = af; 573123922Ssam bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m); 57454263Sshin } 57554263Sshin 57683998Sbrooks if (ng_gif_input_p != NULL) { 577105338Sume (*ng_gif_input_p)(ifp, &m, af); 57883998Sbrooks if (m == NULL) 57983998Sbrooks return; 58083998Sbrooks } 58183998Sbrooks 58254263Sshin /* 58354263Sshin * Put the packet to the network layer input queue according to the 58454263Sshin * specified address family. 58554263Sshin * Note: older versions of gif_input directly called network layer 58695023Ssuz * input functions, e.g. ip6_input, here. We changed the policy to 58754263Sshin * prevent too many recursive calls of such input functions, which 58895023Ssuz * might cause kernel panic. But the change may introduce another 58954263Sshin * problem; if the input queue is full, packets are discarded. 59095023Ssuz * The kernel stack overflow really happened, and we believed 59195023Ssuz * queue-full rarely occurs, so we changed the policy. 59254263Sshin */ 59354263Sshin switch (af) { 59454263Sshin#ifdef INET 59554263Sshin case AF_INET: 59654263Sshin isr = NETISR_IP; 59754263Sshin break; 59854263Sshin#endif 59954263Sshin#ifdef INET6 60054263Sshin case AF_INET6: 60154263Sshin isr = NETISR_IPV6; 60254263Sshin break; 60354263Sshin#endif 604153621Sthompsa case AF_LINK: 605153621Sthompsa n = sizeof(struct etherip_header) + sizeof(struct ether_header); 606153621Sthompsa if (n > m->m_len) { 607153621Sthompsa m = m_pullup(m, n); 608153621Sthompsa if (m == NULL) { 609153621Sthompsa ifp->if_ierrors++; 610153621Sthompsa return; 611153621Sthompsa } 612153621Sthompsa } 613153621Sthompsa 614153621Sthompsa eip = mtod(m, struct etherip_header *); 615193664Shrs /* 616193664Shrs * GIF_ACCEPT_REVETHIP (enabled by default) intentionally 617193664Shrs * accepts an EtherIP packet with revered version field in 618193664Shrs * the header. This is a knob for backward compatibility 619193664Shrs * with FreeBSD 7.2R or prior. 620193664Shrs */ 621193664Shrs if (sc->gif_options & GIF_ACCEPT_REVETHIP) { 622193664Shrs if (eip->eip_resvl != ETHERIP_VERSION 623193664Shrs && eip->eip_ver != ETHERIP_VERSION) { 624193664Shrs /* discard unknown versions */ 625193664Shrs m_freem(m); 626193664Shrs return; 627193664Shrs } 628193664Shrs } else { 629193664Shrs if (eip->eip_ver != ETHERIP_VERSION) { 630193664Shrs /* discard unknown versions */ 631193664Shrs m_freem(m); 632193664Shrs return; 633193664Shrs } 634153621Sthompsa } 635153621Sthompsa m_adj(m, sizeof(struct etherip_header)); 636153621Sthompsa 637153621Sthompsa m->m_flags &= ~(M_BCAST|M_MCAST); 638153621Sthompsa m->m_pkthdr.rcvif = ifp; 639153621Sthompsa 640176879Sthompsa if (ifp->if_bridge) { 641176879Sthompsa oldifp = ifp; 642176879Sthompsa eh = mtod(m, struct ether_header *); 643176879Sthompsa if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 644176879Sthompsa if (ETHER_IS_BROADCAST(eh->ether_dhost)) 645176879Sthompsa m->m_flags |= M_BCAST; 646176879Sthompsa else 647176879Sthompsa m->m_flags |= M_MCAST; 648176879Sthompsa ifp->if_imcasts++; 649176879Sthompsa } 650153621Sthompsa BRIDGE_INPUT(ifp, m); 651176879Sthompsa 652176879Sthompsa if (m != NULL && ifp != oldifp) { 653176879Sthompsa /* 654176879Sthompsa * The bridge gave us back itself or one of the 655176879Sthompsa * members for which the frame is addressed. 656176879Sthompsa */ 657176879Sthompsa ether_demux(ifp, m); 658176879Sthompsa return; 659176879Sthompsa } 660176879Sthompsa } 661153621Sthompsa if (m != NULL) 662153621Sthompsa m_freem(m); 663153621Sthompsa return; 664153621Sthompsa 66554263Sshin default: 66683998Sbrooks if (ng_gif_input_orphan_p != NULL) 667105338Sume (*ng_gif_input_orphan_p)(ifp, m, af); 66883998Sbrooks else 66983998Sbrooks m_freem(m); 67054263Sshin return; 67154263Sshin } 67254263Sshin 673105338Sume ifp->if_ipackets++; 674105338Sume ifp->if_ibytes += m->m_pkthdr.len; 675223741Sbz M_SETFIB(m, ifp->if_fib); 676111888Sjlemon netisr_dispatch(isr, m); 67754263Sshin} 67854263Sshin 67962587Sitojun/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 68054263Sshinint 68154263Sshingif_ioctl(ifp, cmd, data) 68254263Sshin struct ifnet *ifp; 68354263Sshin u_long cmd; 68454263Sshin caddr_t data; 68554263Sshin{ 686147256Sbrooks struct gif_softc *sc = ifp->if_softc; 68754263Sshin struct ifreq *ifr = (struct ifreq*)data; 68854263Sshin int error = 0, size; 689193664Shrs u_int options; 69062587Sitojun struct sockaddr *dst, *src; 691105339Sume#ifdef SIOCSIFMTU /* xxx */ 692105339Sume u_long mtu; 693105339Sume#endif 694105339Sume 69554263Sshin switch (cmd) { 69654263Sshin case SIOCSIFADDR: 697105293Sume ifp->if_flags |= IFF_UP; 69854263Sshin break; 69962587Sitojun 70054263Sshin case SIOCSIFDSTADDR: 70154263Sshin break; 70254263Sshin 70354263Sshin case SIOCADDMULTI: 70454263Sshin case SIOCDELMULTI: 70554263Sshin break; 70654263Sshin 70762587Sitojun#ifdef SIOCSIFMTU /* xxx */ 70854263Sshin case SIOCGIFMTU: 70954263Sshin break; 71062587Sitojun 71154263Sshin case SIOCSIFMTU: 712105339Sume mtu = ifr->ifr_mtu; 713105339Sume if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) 714105339Sume return (EINVAL); 715105339Sume ifp->if_mtu = mtu; 71654263Sshin break; 71762587Sitojun#endif /* SIOCSIFMTU */ 71854263Sshin 719105339Sume#ifdef INET 72054263Sshin case SIOCSIFPHYADDR: 721105339Sume#endif 72254263Sshin#ifdef INET6 72354263Sshin case SIOCSIFPHYADDR_IN6: 72454263Sshin#endif /* INET6 */ 72578064Sume case SIOCSLIFPHYADDR: 72662587Sitojun switch (cmd) { 72778064Sume#ifdef INET 72862587Sitojun case SIOCSIFPHYADDR: 72954263Sshin src = (struct sockaddr *) 73054263Sshin &(((struct in_aliasreq *)data)->ifra_addr); 73154263Sshin dst = (struct sockaddr *) 73254263Sshin &(((struct in_aliasreq *)data)->ifra_dstaddr); 73362587Sitojun break; 73478064Sume#endif 73562587Sitojun#ifdef INET6 73662587Sitojun case SIOCSIFPHYADDR_IN6: 73762587Sitojun src = (struct sockaddr *) 73862587Sitojun &(((struct in6_aliasreq *)data)->ifra_addr); 73962587Sitojun dst = (struct sockaddr *) 74062587Sitojun &(((struct in6_aliasreq *)data)->ifra_dstaddr); 74162587Sitojun break; 74262587Sitojun#endif 74378064Sume case SIOCSLIFPHYADDR: 74478064Sume src = (struct sockaddr *) 74578064Sume &(((struct if_laddrreq *)data)->addr); 74678064Sume dst = (struct sockaddr *) 74778064Sume &(((struct if_laddrreq *)data)->dstaddr); 748105293Sume break; 74991327Sbrooks default: 750105293Sume return EINVAL; 75162587Sitojun } 75254263Sshin 75378064Sume /* sa_family must be equal */ 75478064Sume if (src->sa_family != dst->sa_family) 75578064Sume return EINVAL; 75678064Sume 75778064Sume /* validate sa_len */ 75878064Sume switch (src->sa_family) { 75978064Sume#ifdef INET 76078064Sume case AF_INET: 76178064Sume if (src->sa_len != sizeof(struct sockaddr_in)) 76278064Sume return EINVAL; 76378064Sume break; 76478064Sume#endif 76578064Sume#ifdef INET6 76678064Sume case AF_INET6: 76778064Sume if (src->sa_len != sizeof(struct sockaddr_in6)) 76878064Sume return EINVAL; 76978064Sume break; 77078064Sume#endif 77178064Sume default: 77278064Sume return EAFNOSUPPORT; 77378064Sume } 77478064Sume switch (dst->sa_family) { 77578064Sume#ifdef INET 77678064Sume case AF_INET: 77778064Sume if (dst->sa_len != sizeof(struct sockaddr_in)) 77878064Sume return EINVAL; 77978064Sume break; 78078064Sume#endif 78178064Sume#ifdef INET6 78278064Sume case AF_INET6: 78378064Sume if (dst->sa_len != sizeof(struct sockaddr_in6)) 78478064Sume return EINVAL; 78578064Sume break; 78678064Sume#endif 78778064Sume default: 78878064Sume return EAFNOSUPPORT; 78978064Sume } 79078064Sume 79178064Sume /* check sa_family looks sane for the cmd */ 79278064Sume switch (cmd) { 79378064Sume case SIOCSIFPHYADDR: 79478064Sume if (src->sa_family == AF_INET) 79578064Sume break; 79678064Sume return EAFNOSUPPORT; 79778064Sume#ifdef INET6 79878064Sume case SIOCSIFPHYADDR_IN6: 79978064Sume if (src->sa_family == AF_INET6) 80078064Sume break; 80178064Sume return EAFNOSUPPORT; 80278064Sume#endif /* INET6 */ 80378064Sume case SIOCSLIFPHYADDR: 80478064Sume /* checks done in the above */ 80578064Sume break; 80678064Sume } 80778064Sume 808147256Sbrooks error = gif_set_tunnel(GIF2IFP(sc), src, dst); 80962587Sitojun break; 81062587Sitojun 81162587Sitojun#ifdef SIOCDIFPHYADDR 81262587Sitojun case SIOCDIFPHYADDR: 813147256Sbrooks gif_delete_tunnel(GIF2IFP(sc)); 81454263Sshin break; 81562587Sitojun#endif 81662587Sitojun 81754263Sshin case SIOCGIFPSRCADDR: 81854263Sshin#ifdef INET6 81954263Sshin case SIOCGIFPSRCADDR_IN6: 82054263Sshin#endif /* INET6 */ 82154263Sshin if (sc->gif_psrc == NULL) { 82254263Sshin error = EADDRNOTAVAIL; 82354263Sshin goto bad; 82454263Sshin } 82554263Sshin src = sc->gif_psrc; 82678064Sume switch (cmd) { 82754263Sshin#ifdef INET 82878064Sume case SIOCGIFPSRCADDR: 82954263Sshin dst = &ifr->ifr_addr; 83078064Sume size = sizeof(ifr->ifr_addr); 83154263Sshin break; 83254263Sshin#endif /* INET */ 83354263Sshin#ifdef INET6 83478064Sume case SIOCGIFPSRCADDR_IN6: 83554263Sshin dst = (struct sockaddr *) 83654263Sshin &(((struct in6_ifreq *)data)->ifr_addr); 83778064Sume size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 83854263Sshin break; 83954263Sshin#endif /* INET6 */ 84054263Sshin default: 84154263Sshin error = EADDRNOTAVAIL; 84254263Sshin goto bad; 84354263Sshin } 84478064Sume if (src->sa_len > size) 84578064Sume return EINVAL; 84678064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 847148385Sume#ifdef INET6 848148385Sume if (dst->sa_family == AF_INET6) { 849148385Sume error = sa6_recoverscope((struct sockaddr_in6 *)dst); 850148385Sume if (error != 0) 851148385Sume return (error); 852148385Sume } 853148385Sume#endif 85454263Sshin break; 85562587Sitojun 85654263Sshin case SIOCGIFPDSTADDR: 85754263Sshin#ifdef INET6 85854263Sshin case SIOCGIFPDSTADDR_IN6: 85954263Sshin#endif /* INET6 */ 86054263Sshin if (sc->gif_pdst == NULL) { 86154263Sshin error = EADDRNOTAVAIL; 86254263Sshin goto bad; 86354263Sshin } 86454263Sshin src = sc->gif_pdst; 86578064Sume switch (cmd) { 86654263Sshin#ifdef INET 86778064Sume case SIOCGIFPDSTADDR: 86854263Sshin dst = &ifr->ifr_addr; 86978064Sume size = sizeof(ifr->ifr_addr); 87054263Sshin break; 87154263Sshin#endif /* INET */ 87254263Sshin#ifdef INET6 87378064Sume case SIOCGIFPDSTADDR_IN6: 87454263Sshin dst = (struct sockaddr *) 87554263Sshin &(((struct in6_ifreq *)data)->ifr_addr); 87678064Sume size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 87754263Sshin break; 87854263Sshin#endif /* INET6 */ 87954263Sshin default: 88054263Sshin error = EADDRNOTAVAIL; 88154263Sshin goto bad; 88254263Sshin } 88378064Sume if (src->sa_len > size) 88478064Sume return EINVAL; 885219206Sbz error = prison_if(curthread->td_ucred, src); 886219206Sbz if (error != 0) 887219206Sbz return (error); 888219206Sbz error = prison_if(curthread->td_ucred, dst); 889219206Sbz if (error != 0) 890219206Sbz return (error); 89178064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 892148385Sume#ifdef INET6 893148385Sume if (dst->sa_family == AF_INET6) { 894148385Sume error = sa6_recoverscope((struct sockaddr_in6 *)dst); 895148385Sume if (error != 0) 896148385Sume return (error); 897148385Sume } 898148385Sume#endif 89954263Sshin break; 90054263Sshin 90178064Sume case SIOCGLIFPHYADDR: 90278064Sume if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 90378064Sume error = EADDRNOTAVAIL; 90478064Sume goto bad; 90578064Sume } 90678064Sume 90778064Sume /* copy src */ 90878064Sume src = sc->gif_psrc; 90978064Sume dst = (struct sockaddr *) 91078064Sume &(((struct if_laddrreq *)data)->addr); 91178064Sume size = sizeof(((struct if_laddrreq *)data)->addr); 91278064Sume if (src->sa_len > size) 91378064Sume return EINVAL; 91478064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 91578064Sume 91678064Sume /* copy dst */ 91778064Sume src = sc->gif_pdst; 91878064Sume dst = (struct sockaddr *) 91978064Sume &(((struct if_laddrreq *)data)->dstaddr); 92078064Sume size = sizeof(((struct if_laddrreq *)data)->dstaddr); 92178064Sume if (src->sa_len > size) 92278064Sume return EINVAL; 92378064Sume bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 92478064Sume break; 92578064Sume 92654263Sshin case SIOCSIFFLAGS: 92762587Sitojun /* if_ioctl() takes care of it */ 92854263Sshin break; 92954263Sshin 930193664Shrs case GIFGOPTS: 931193664Shrs options = sc->gif_options; 932193664Shrs error = copyout(&options, ifr->ifr_data, 933193664Shrs sizeof(options)); 934193664Shrs break; 935193664Shrs 936193664Shrs case GIFSOPTS: 937193664Shrs if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0) 938193664Shrs break; 939193815Shrs error = copyin(ifr->ifr_data, &options, sizeof(options)); 940193815Shrs if (error) 941193815Shrs break; 942193815Shrs if (options & ~GIF_OPTMASK) 943193815Shrs error = EINVAL; 944193815Shrs else 945193815Shrs sc->gif_options = options; 946193664Shrs break; 947193664Shrs 94854263Sshin default: 94954263Sshin error = EINVAL; 95054263Sshin break; 95154263Sshin } 95254263Sshin bad: 95354263Sshin return error; 95454263Sshin} 95579106Sbrooks 956127305Srwatson/* 957127305Srwatson * XXXRW: There's a general event-ordering issue here: the code to check 958127305Srwatson * if a given tunnel is already present happens before we perform a 959127305Srwatson * potentially blocking setup of the tunnel. This code needs to be 960127305Srwatson * re-ordered so that the check and replacement can be atomic using 961127305Srwatson * a mutex. 962127305Srwatson */ 963105293Sumeint 964105293Sumegif_set_tunnel(ifp, src, dst) 965105293Sume struct ifnet *ifp; 966105293Sume struct sockaddr *src; 967105293Sume struct sockaddr *dst; 968105293Sume{ 969147256Sbrooks struct gif_softc *sc = ifp->if_softc; 970105293Sume struct gif_softc *sc2; 971105293Sume struct sockaddr *osrc, *odst, *sa; 972105293Sume int error = 0; 973105293Sume 974127305Srwatson mtx_lock(&gif_mtx); 975181803Sbz LIST_FOREACH(sc2, &V_gif_softc_list, gif_list) { 976105293Sume if (sc2 == sc) 977105293Sume continue; 978105293Sume if (!sc2->gif_pdst || !sc2->gif_psrc) 979105293Sume continue; 980105293Sume if (sc2->gif_pdst->sa_family != dst->sa_family || 981105293Sume sc2->gif_pdst->sa_len != dst->sa_len || 982105293Sume sc2->gif_psrc->sa_family != src->sa_family || 983105293Sume sc2->gif_psrc->sa_len != src->sa_len) 984105293Sume continue; 985105293Sume 986105293Sume /* 987105293Sume * Disallow parallel tunnels unless instructed 988105293Sume * otherwise. 989105293Sume */ 990181803Sbz if (!V_parallel_tunnels && 991105293Sume bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 992105293Sume bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 993105293Sume error = EADDRNOTAVAIL; 994127305Srwatson mtx_unlock(&gif_mtx); 995105293Sume goto bad; 996105293Sume } 997105293Sume 998105293Sume /* XXX both end must be valid? (I mean, not 0.0.0.0) */ 999105293Sume } 1000127305Srwatson mtx_unlock(&gif_mtx); 1001105293Sume 1002105293Sume /* XXX we can detach from both, but be polite just in case */ 1003105293Sume if (sc->gif_psrc) 1004105293Sume switch (sc->gif_psrc->sa_family) { 1005105293Sume#ifdef INET 1006105293Sume case AF_INET: 1007105293Sume (void)in_gif_detach(sc); 1008105293Sume break; 1009105293Sume#endif 1010105293Sume#ifdef INET6 1011105293Sume case AF_INET6: 1012105293Sume (void)in6_gif_detach(sc); 1013105293Sume break; 1014105293Sume#endif 1015105293Sume } 1016105293Sume 1017105293Sume osrc = sc->gif_psrc; 1018111119Simp sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK); 1019105293Sume bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 1020105293Sume sc->gif_psrc = sa; 1021105293Sume 1022105293Sume odst = sc->gif_pdst; 1023111119Simp sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK); 1024105293Sume bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 1025105293Sume sc->gif_pdst = sa; 1026105293Sume 1027105293Sume switch (sc->gif_psrc->sa_family) { 1028105293Sume#ifdef INET 1029105293Sume case AF_INET: 1030105293Sume error = in_gif_attach(sc); 1031105293Sume break; 1032105293Sume#endif 1033105293Sume#ifdef INET6 1034105293Sume case AF_INET6: 1035148385Sume /* 1036148385Sume * Check validity of the scope zone ID of the addresses, and 1037148385Sume * convert it into the kernel internal form if necessary. 1038148385Sume */ 1039148385Sume error = sa6_embedscope((struct sockaddr_in6 *)sc->gif_psrc, 0); 1040148385Sume if (error != 0) 1041148385Sume break; 1042148385Sume error = sa6_embedscope((struct sockaddr_in6 *)sc->gif_pdst, 0); 1043148385Sume if (error != 0) 1044148385Sume break; 1045105293Sume error = in6_gif_attach(sc); 1046105293Sume break; 1047105293Sume#endif 1048105293Sume } 1049105293Sume if (error) { 1050105293Sume /* rollback */ 1051105293Sume free((caddr_t)sc->gif_psrc, M_IFADDR); 1052105293Sume free((caddr_t)sc->gif_pdst, M_IFADDR); 1053105293Sume sc->gif_psrc = osrc; 1054105293Sume sc->gif_pdst = odst; 1055105293Sume goto bad; 1056105293Sume } 1057105293Sume 1058105293Sume if (osrc) 1059105293Sume free((caddr_t)osrc, M_IFADDR); 1060105293Sume if (odst) 1061105293Sume free((caddr_t)odst, M_IFADDR); 1062105293Sume 1063105293Sume bad: 1064105293Sume if (sc->gif_psrc && sc->gif_pdst) 1065148887Srwatson ifp->if_drv_flags |= IFF_DRV_RUNNING; 1066105293Sume else 1067148887Srwatson ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1068105293Sume 1069105293Sume return error; 1070105293Sume} 1071105293Sume 107279106Sbrooksvoid 1073105293Sumegif_delete_tunnel(ifp) 1074105293Sume struct ifnet *ifp; 107579106Sbrooks{ 1076147256Sbrooks struct gif_softc *sc = ifp->if_softc; 107779106Sbrooks 107879106Sbrooks if (sc->gif_psrc) { 107979106Sbrooks free((caddr_t)sc->gif_psrc, M_IFADDR); 108079106Sbrooks sc->gif_psrc = NULL; 108179106Sbrooks } 108279106Sbrooks if (sc->gif_pdst) { 108379106Sbrooks free((caddr_t)sc->gif_pdst, M_IFADDR); 108479106Sbrooks sc->gif_pdst = NULL; 108579106Sbrooks } 1086105293Sume /* it is safe to detach from both */ 1087105293Sume#ifdef INET 1088105293Sume (void)in_gif_detach(sc); 1089105293Sume#endif 1090105293Sume#ifdef INET6 1091105293Sume (void)in6_gif_detach(sc); 1092105293Sume#endif 1093160018Syar ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 109479106Sbrooks} 1095