diff options
Diffstat (limited to 'rtems/freebsd/net/if_faith.c')
| -rw-r--r-- | rtems/freebsd/net/if_faith.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/rtems/freebsd/net/if_faith.c b/rtems/freebsd/net/if_faith.c new file mode 100644 index 00000000..7ccfb4d3 --- /dev/null +++ b/rtems/freebsd/net/if_faith.c @@ -0,0 +1,353 @@ +#include <rtems/freebsd/machine/rtems-bsd-config.h> + +/* $KAME: if_faith.c,v 1.23 2001/12/17 13:55:29 sumikawa Exp $ */ + +/*- + * Copyright (c) 1982, 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ +/* + * derived from + * @(#)if_loop.c 8.1 (Berkeley) 6/10/93 + * Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp + */ + +/* + * Loopback interface driver for protocol testing and timing. + */ +#include <rtems/freebsd/local/opt_inet.h> +#include <rtems/freebsd/local/opt_inet6.h> + +#include <rtems/freebsd/sys/param.h> +#include <rtems/freebsd/sys/systm.h> +#include <rtems/freebsd/sys/kernel.h> +#include <rtems/freebsd/sys/mbuf.h> +#include <rtems/freebsd/sys/module.h> +#include <rtems/freebsd/sys/socket.h> +#include <rtems/freebsd/sys/errno.h> +#include <rtems/freebsd/sys/sockio.h> +#include <rtems/freebsd/sys/time.h> +#include <rtems/freebsd/sys/queue.h> +#include <rtems/freebsd/sys/types.h> +#include <rtems/freebsd/sys/malloc.h> + +#include <rtems/freebsd/net/if.h> +#include <rtems/freebsd/net/if_clone.h> +#include <rtems/freebsd/net/if_types.h> +#include <rtems/freebsd/net/netisr.h> +#include <rtems/freebsd/net/route.h> +#include <rtems/freebsd/net/bpf.h> +#include <rtems/freebsd/net/vnet.h> + +#ifdef INET +#include <rtems/freebsd/netinet/in.h> +#include <rtems/freebsd/netinet/in_systm.h> +#include <rtems/freebsd/netinet/in_var.h> +#include <rtems/freebsd/netinet/ip.h> +#endif + +#ifdef INET6 +#ifndef INET +#include <rtems/freebsd/netinet/in.h> +#endif +#include <rtems/freebsd/netinet6/in6_var.h> +#include <rtems/freebsd/netinet/ip6.h> +#include <rtems/freebsd/netinet6/ip6_var.h> +#endif + +#define FAITHNAME "faith" + +struct faith_softc { + struct ifnet *sc_ifp; +}; + +static int faithioctl(struct ifnet *, u_long, caddr_t); +int faithoutput(struct ifnet *, struct mbuf *, struct sockaddr *, + struct route *); +static void faithrtrequest(int, struct rtentry *, struct rt_addrinfo *); +#ifdef INET6 +static int faithprefix(struct in6_addr *); +#endif + +static int faithmodevent(module_t, int, void *); + +static MALLOC_DEFINE(M_FAITH, FAITHNAME, "Firewall Assisted Tunnel Interface"); + +static int faith_clone_create(struct if_clone *, int, caddr_t); +static void faith_clone_destroy(struct ifnet *); + +IFC_SIMPLE_DECLARE(faith, 0); + +#define FAITHMTU 1500 + +static int +faithmodevent(mod, type, data) + module_t mod; + int type; + void *data; +{ + + switch (type) { + case MOD_LOAD: + if_clone_attach(&faith_cloner); + +#ifdef INET6 + faithprefix_p = faithprefix; +#endif + + break; + case MOD_UNLOAD: +#ifdef INET6 + faithprefix_p = NULL; +#endif + + if_clone_detach(&faith_cloner); + break; + default: + return EOPNOTSUPP; + } + return 0; +} + +static moduledata_t faith_mod = { + "if_faith", + faithmodevent, + 0 +}; + +DECLARE_MODULE(if_faith, faith_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); +MODULE_VERSION(if_faith, 1); + +static int +faith_clone_create(ifc, unit, params) + struct if_clone *ifc; + int unit; + caddr_t params; +{ + struct ifnet *ifp; + struct faith_softc *sc; + + sc = malloc(sizeof(struct faith_softc), M_FAITH, M_WAITOK | M_ZERO); + ifp = sc->sc_ifp = if_alloc(IFT_FAITH); + if (ifp == NULL) { + free(sc, M_FAITH); + return (ENOSPC); + } + + ifp->if_softc = sc; + if_initname(sc->sc_ifp, ifc->ifc_name, unit); + + ifp->if_mtu = FAITHMTU; + /* Change to BROADCAST experimentaly to announce its prefix. */ + ifp->if_flags = /* IFF_LOOPBACK */ IFF_BROADCAST | IFF_MULTICAST; + ifp->if_ioctl = faithioctl; + ifp->if_output = faithoutput; + ifp->if_hdrlen = 0; + ifp->if_addrlen = 0; + ifp->if_snd.ifq_maxlen = ifqmaxlen; + if_attach(ifp); + bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); + return (0); +} + +static void +faith_clone_destroy(ifp) + struct ifnet *ifp; +{ + struct faith_softc *sc = ifp->if_softc; + + bpfdetach(ifp); + if_detach(ifp); + if_free(ifp); + free(sc, M_FAITH); +} + +int +faithoutput(ifp, m, dst, ro) + struct ifnet *ifp; + struct mbuf *m; + struct sockaddr *dst; + struct route *ro; +{ + int isr; + u_int32_t af; + struct rtentry *rt = NULL; + + M_ASSERTPKTHDR(m); + + if (ro != NULL) + rt = ro->ro_rt; + /* BPF writes need to be handled specially. */ + if (dst->sa_family == AF_UNSPEC) { + bcopy(dst->sa_data, &af, sizeof(af)); + dst->sa_family = af; + } + + if (bpf_peers_present(ifp->if_bpf)) { + af = dst->sa_family; + bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m); + } + + if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) { + m_freem(m); + return (rt->rt_flags & RTF_BLACKHOLE ? 0 : + rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH); + } + ifp->if_opackets++; + ifp->if_obytes += m->m_pkthdr.len; + switch (dst->sa_family) { +#ifdef INET + case AF_INET: + isr = NETISR_IP; + break; +#endif +#ifdef INET6 + case AF_INET6: + isr = NETISR_IPV6; + break; +#endif + default: + m_freem(m); + return EAFNOSUPPORT; + } + + /* XXX do we need more sanity checks? */ + + m->m_pkthdr.rcvif = ifp; + ifp->if_ipackets++; + ifp->if_ibytes += m->m_pkthdr.len; + netisr_dispatch(isr, m); + return (0); +} + +/* ARGSUSED */ +static void +faithrtrequest(cmd, rt, info) + int cmd; + struct rtentry *rt; + struct rt_addrinfo *info; +{ + RT_LOCK_ASSERT(rt); + rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; +} + +/* + * Process an ioctl request. + */ +/* ARGSUSED */ +static int +faithioctl(ifp, cmd, data) + struct ifnet *ifp; + u_long cmd; + caddr_t data; +{ + struct ifaddr *ifa; + struct ifreq *ifr = (struct ifreq *)data; + int error = 0; + + switch (cmd) { + + case SIOCSIFADDR: + ifp->if_flags |= IFF_UP; + ifp->if_drv_flags |= IFF_DRV_RUNNING; + ifa = (struct ifaddr *)data; + ifa->ifa_rtrequest = faithrtrequest; + /* + * Everything else is done at a higher level. + */ + break; + + case SIOCADDMULTI: + case SIOCDELMULTI: + if (ifr == 0) { + error = EAFNOSUPPORT; /* XXX */ + break; + } + switch (ifr->ifr_addr.sa_family) { +#ifdef INET + case AF_INET: + break; +#endif +#ifdef INET6 + case AF_INET6: + break; +#endif + + default: + error = EAFNOSUPPORT; + break; + } + break; + +#ifdef SIOCSIFMTU + case SIOCSIFMTU: + ifp->if_mtu = ifr->ifr_mtu; + break; +#endif + + case SIOCSIFFLAGS: + break; + + default: + error = EINVAL; + } + return (error); +} + +#ifdef INET6 +/* + * XXX could be slow + * XXX could be layer violation to call sys/net from sys/netinet6 + */ +static int +faithprefix(in6) + struct in6_addr *in6; +{ + struct rtentry *rt; + struct sockaddr_in6 sin6; + int ret; + + if (V_ip6_keepfaith == 0) + return 0; + + bzero(&sin6, sizeof(sin6)); + sin6.sin6_family = AF_INET6; + sin6.sin6_len = sizeof(struct sockaddr_in6); + sin6.sin6_addr = *in6; + rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL); + if (rt && rt->rt_ifp && rt->rt_ifp->if_type == IFT_FAITH && + (rt->rt_ifp->if_flags & IFF_UP) != 0) + ret = 1; + else + ret = 0; + if (rt) + RTFREE_LOCKED(rt); + return ret; +} +#endif |