Move files to match FreeBSD layout

1 files changed, 451 insertions, 0 deletions

diff --git a/freebsd/sys/net/if_loop.c b/freebsd/sys/net/if_loop.c
new file mode 100644
index 00000000..d80bfdad
--- /dev/null
+++ b/freebsd/sys/net/if_loop.c
@@ -0,0 +1,451 @@
+#include <freebsd/machine/rtems-bsd-config.h>
+
+/*-
+ * 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.
+ *
+ *	@(#)if_loop.c	8.2 (Berkeley) 1/9/95
+ * $FreeBSD$
+ */
+
+/*
+ * Loopback interface driver for protocol testing and timing.
+ */
+
+#include <freebsd/local/opt_atalk.h>
+#include <freebsd/local/opt_inet.h>
+#include <freebsd/local/opt_inet6.h>
+#include <freebsd/local/opt_ipx.h>
+
+#include <freebsd/sys/param.h>
+#include <freebsd/sys/systm.h>
+#include <freebsd/sys/kernel.h>
+#include <freebsd/sys/mbuf.h>
+#include <freebsd/sys/module.h>
+#include <freebsd/machine/bus.h>
+#include <freebsd/sys/rman.h>
+#include <freebsd/sys/socket.h>
+#include <freebsd/sys/sockio.h>
+#include <freebsd/sys/sysctl.h>
+
+#include <freebsd/net/if.h>
+#include <freebsd/net/if_clone.h>
+#include <freebsd/net/if_types.h>
+#include <freebsd/net/netisr.h>
+#include <freebsd/net/route.h>
+#include <freebsd/net/bpf.h>
+#include <freebsd/net/vnet.h>
+
+#ifdef	INET
+#include <freebsd/netinet/in.h>
+#include <freebsd/netinet/in_var.h>
+#endif
+
+#ifdef IPX
+#include <freebsd/netipx/ipx.h>
+#include <freebsd/netipx/ipx_if.h>
+#endif
+
+#ifdef INET6
+#ifndef INET
+#include <freebsd/netinet/in.h>
+#endif
+#include <freebsd/netinet6/in6_var.h>
+#include <freebsd/netinet/ip6.h>
+#endif
+
+#ifdef NETATALK
+#include <freebsd/netatalk/at.h>
+#include <freebsd/netatalk/at_var.h>
+#endif
+
+#include <freebsd/security/mac/mac_framework.h>
+
+#ifdef TINY_LOMTU
+#define	LOMTU	(1024+512)
+#elif defined(LARGE_LOMTU)
+#define LOMTU	131072
+#else
+#define LOMTU	16384
+#endif
+
+#define	LO_CSUM_FEATURES	(CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_SCTP)
+#define	LO_CSUM_SET		(CSUM_DATA_VALID | CSUM_PSEUDO_HDR | \
+				    CSUM_IP_CHECKED | CSUM_IP_VALID | \
+				    CSUM_SCTP_VALID)
+
+int		loioctl(struct ifnet *, u_long, caddr_t);
+static void	lortrequest(int, struct rtentry *, struct rt_addrinfo *);
+int		looutput(struct ifnet *ifp, struct mbuf *m,
+		    struct sockaddr *dst, struct route *ro);
+static int	lo_clone_create(struct if_clone *, int, caddr_t);
+static void	lo_clone_destroy(struct ifnet *);
+
+VNET_DEFINE(struct ifnet *, loif);	/* Used externally */
+
+#ifdef VIMAGE
+static VNET_DEFINE(struct ifc_simple_data, lo_cloner_data);
+static VNET_DEFINE(struct if_clone, lo_cloner);
+#define	V_lo_cloner_data	VNET(lo_cloner_data)
+#define	V_lo_cloner		VNET(lo_cloner)
+#endif
+
+IFC_SIMPLE_DECLARE(lo, 1);
+
+static void
+lo_clone_destroy(struct ifnet *ifp)
+{
+
+#ifndef VIMAGE
+	/* XXX: destroying lo0 will lead to panics. */
+	KASSERT(V_loif != ifp, ("%s: destroying lo0", __func__));
+#endif
+
+	bpfdetach(ifp);
+	if_detach(ifp);
+	if_free(ifp);
+}
+
+static int
+lo_clone_create(struct if_clone *ifc, int unit, caddr_t params)
+{
+	struct ifnet *ifp;
+
+	ifp = if_alloc(IFT_LOOP);
+	if (ifp == NULL)
+		return (ENOSPC);
+
+	if_initname(ifp, ifc->ifc_name, unit);
+	ifp->if_mtu = LOMTU;
+	ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
+	ifp->if_ioctl = loioctl;
+	ifp->if_output = looutput;
+	ifp->if_snd.ifq_maxlen = ifqmaxlen;
+	ifp->if_capabilities = ifp->if_capenable = IFCAP_HWCSUM;
+	ifp->if_hwassist = LO_CSUM_FEATURES;
+	if_attach(ifp);
+	bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
+	if (V_loif == NULL)
+		V_loif = ifp;
+
+	return (0);
+}
+
+static void
+vnet_loif_init(const void *unused __unused)
+{
+
+#ifdef VIMAGE
+	V_lo_cloner = lo_cloner;
+	V_lo_cloner_data = lo_cloner_data;
+	V_lo_cloner.ifc_data = &V_lo_cloner_data;
+	if_clone_attach(&V_lo_cloner);
+#else
+	if_clone_attach(&lo_cloner);
+#endif
+}
+VNET_SYSINIT(vnet_loif_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
+    vnet_loif_init, NULL);
+
+#ifdef VIMAGE
+static void
+vnet_loif_uninit(const void *unused __unused)
+{
+
+	if_clone_detach(&V_lo_cloner);
+	V_loif = NULL;
+}
+VNET_SYSUNINIT(vnet_loif_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
+    vnet_loif_uninit, NULL);
+#endif
+
+static int
+loop_modevent(module_t mod, int type, void *data)
+{
+
+	switch (type) {
+	case MOD_LOAD:
+		break;
+
+	case MOD_UNLOAD:
+		printf("loop module unload - not possible for this module type\n");
+		return (EINVAL);
+
+	default:
+		return (EOPNOTSUPP);
+	}
+	return (0);
+}
+
+static moduledata_t loop_mod = {
+	"if_lo",
+	loop_modevent,
+	0
+};
+
+DECLARE_MODULE(if_lo, loop_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY);
+
+int
+looutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
+    struct route *ro)
+{
+	u_int32_t af;
+	struct rtentry *rt = NULL;
+#ifdef MAC
+	int error;
+#endif
+
+	M_ASSERTPKTHDR(m); /* check if we have the packet header */
+
+	if (ro != NULL)
+		rt = ro->ro_rt;
+#ifdef MAC
+	error = mac_ifnet_check_transmit(ifp, m);
+	if (error) {
+		m_freem(m);
+		return (error);
+	}
+#endif
+
+	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;
+
+	/* 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 1	/* XXX */
+	switch (dst->sa_family) {
+	case AF_INET:
+		if (ifp->if_capenable & IFCAP_RXCSUM) {
+			m->m_pkthdr.csum_data = 0xffff;
+			m->m_pkthdr.csum_flags = LO_CSUM_SET;
+		}
+		m->m_pkthdr.csum_flags &= ~LO_CSUM_FEATURES;
+	case AF_INET6:
+	case AF_IPX:
+	case AF_APPLETALK:
+		break;
+	default:
+		printf("looutput: af=%d unexpected\n", dst->sa_family);
+		m_freem(m);
+		return (EAFNOSUPPORT);
+	}
+#endif
+	return (if_simloop(ifp, m, dst->sa_family, 0));
+}
+
+/*
+ * if_simloop()
+ *
+ * This function is to support software emulation of hardware loopback,
+ * i.e., for interfaces with the IFF_SIMPLEX attribute. Since they can't
+ * hear their own broadcasts, we create a copy of the packet that we
+ * would normally receive via a hardware loopback.
+ *
+ * This function expects the packet to include the media header of length hlen.
+ */
+int
+if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen)
+{
+	int isr;
+
+	M_ASSERTPKTHDR(m);
+	m_tag_delete_nonpersistent(m);
+	m->m_pkthdr.rcvif = ifp;
+
+#ifdef MAC
+	mac_ifnet_create_mbuf(ifp, m);
+#endif
+
+	/*
+	 * Let BPF see incoming packet in the following manner:
+	 *  - Emulated packet loopback for a simplex interface
+	 *    (net/if_ethersubr.c)
+	 *	-> passes it to ifp's BPF
+	 *  - IPv4/v6 multicast packet loopback (netinet(6)/ip(6)_output.c)
+	 *	-> not passes it to any BPF
+	 *  - Normal packet loopback from myself to myself (net/if_loop.c)
+	 *	-> passes to lo0's BPF (even in case of IPv6, where ifp!=lo0)
+	 */
+	if (hlen > 0) {
+		if (bpf_peers_present(ifp->if_bpf)) {
+			bpf_mtap(ifp->if_bpf, m);
+		}
+	} else {
+		if (bpf_peers_present(V_loif->if_bpf)) {
+			if ((m->m_flags & M_MCAST) == 0 || V_loif == ifp) {
+				/* XXX beware sizeof(af) != 4 */
+				u_int32_t af1 = af;
+
+				/*
+				 * We need to prepend the address family.
+				 */
+				bpf_mtap2(V_loif->if_bpf, &af1, sizeof(af1), m);
+			}
+		}
+	}
+
+	/* Strip away media header */
+	if (hlen > 0) {
+		m_adj(m, hlen);
+#ifndef __NO_STRICT_ALIGNMENT
+		/*
+		 * Some archs do not like unaligned data, so
+		 * we move data down in the first mbuf.
+		 */
+		if (mtod(m, vm_offset_t) & 3) {
+			KASSERT(hlen >= 3, ("if_simloop: hlen too small"));
+			bcopy(m->m_data,
+			    (char *)(mtod(m, vm_offset_t)
+				- (mtod(m, vm_offset_t) & 3)),
+			    m->m_len);
+			m->m_data -= (mtod(m,vm_offset_t) & 3);
+		}
+#endif
+	}
+
+	/* Deliver to upper layer protocol */
+	switch (af) {
+#ifdef INET
+	case AF_INET:
+		isr = NETISR_IP;
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		m->m_flags |= M_LOOP;
+		isr = NETISR_IPV6;
+		break;
+#endif
+#ifdef IPX
+	case AF_IPX:
+		isr = NETISR_IPX;
+		break;
+#endif
+#ifdef NETATALK
+	case AF_APPLETALK:
+		isr = NETISR_ATALK2;
+		break;
+#endif
+	default:
+		printf("if_simloop: can't handle af=%d\n", af);
+		m_freem(m);
+		return (EAFNOSUPPORT);
+	}
+	ifp->if_ipackets++;
+	ifp->if_ibytes += m->m_pkthdr.len;
+	netisr_queue(isr, m);	/* mbuf is free'd on failure. */
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+lortrequest(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 */
+int
+loioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
+{
+	struct ifaddr *ifa;
+	struct ifreq *ifr = (struct ifreq *)data;
+	int error = 0, mask;
+
+	switch (cmd) {
+	case SIOCSIFADDR:
+		ifp->if_flags |= IFF_UP;
+		ifp->if_drv_flags |= IFF_DRV_RUNNING;
+		ifa = (struct ifaddr *)data;
+		ifa->ifa_rtrequest = lortrequest;
+		/*
+		 * 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;
+
+	case SIOCSIFMTU:
+		ifp->if_mtu = ifr->ifr_mtu;
+		break;
+
+	case SIOCSIFFLAGS:
+		break;
+
+	case SIOCSIFCAP:
+		mask = ifp->if_capenable ^ ifr->ifr_reqcap;
+		if ((mask & IFCAP_RXCSUM) != 0)
+			ifp->if_capenable ^= IFCAP_RXCSUM;
+		if ((mask & IFCAP_TXCSUM) != 0)
+			ifp->if_capenable ^= IFCAP_TXCSUM;
+		if (ifp->if_capenable & IFCAP_TXCSUM)
+			ifp->if_hwassist = LO_CSUM_FEATURES;
+		else
+			ifp->if_hwassist = 0;
+		break;
+
+	default:
+		error = EINVAL;
+	}
+	return (error);
+}