Add a node that looks to all the word like an ethernet but delivers its

ehternet frames to a netgraph  hook.

Submitted by: "Vitaly V. Belekhov" <vitaly@riss-telecom.ru>
translated to 5.0 by me. man page not yet written.

This node still needs a little work.. don't use yet. Not yet linked into
the build.

2 files changed, 733 insertions, 0 deletions

diff --git a/sys/netgraph/ng_eiface.c b/sys/netgraph/ng_eiface.c
new file mode 100644
index 0000000..eebb503
--- /dev/null
+++ b/sys/netgraph/ng_eiface.c
@@ -0,0 +1,633 @@
+/*-
+ *
+ * Copyright (c) 1999-2001, Vitaly V Belekhov
+ * 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 unmodified, 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/errno.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/errno.h>
+#include <sys/sockio.h>
+#include <sys/socket.h>
+#include <sys/syslog.h>
+
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/netisr.h>
+
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+
+#include <netgraph/ng_message.h>
+#include <netgraph/netgraph.h>
+#include <netgraph/ng_parse.h>
+#include <netgraph/ng_eiface.h>
+
+#include <net/bpf.h>
+#include <net/ethernet.h>
+#include <net/if_arp.h>
+
+
+/* Node private data */
+struct ng_eiface_private {
+	struct ifnet   *ifp;	/* This interface */
+	int	unit;		/* Interface unit number */
+	struct arpcom   arpcom;	/* per-interface network data */
+	node_p		node;	/* Our netgraph node */
+	hook_p		ether;	/* Hook for ethernet stream */
+};
+typedef struct ng_eiface_private *priv_p;
+
+/* Interface methods */
+static void     ng_eiface_init(void *xsc);
+static void     ng_eiface_start(struct ifnet *ifp);
+static int      ng_eiface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
+#ifdef DEBUG
+static void     ng_eiface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
+#endif
+
+/* Netgraph methods */
+static ng_constructor_t ng_eiface_constructor;
+static ng_rcvmsg_t ng_eiface_rcvmsg;
+static ng_shutdown_t ng_eiface_rmnode;
+static ng_newhook_t ng_eiface_newhook;
+static ng_rcvdata_t ng_eiface_rcvdata;
+static ng_connect_t ng_eiface_connect;
+static ng_disconnect_t ng_eiface_disconnect;
+
+/* Node type descriptor */
+static struct ng_type typestruct = {
+	NG_VERSION,
+	NG_EIFACE_NODE_TYPE,
+	NULL,
+	ng_eiface_constructor,
+	ng_eiface_rcvmsg,
+	ng_eiface_rmnode,
+	ng_eiface_newhook,
+	NULL,
+	ng_eiface_connect,
+	ng_eiface_rcvdata,
+	ng_eiface_disconnect,
+	ng_eiface_cmdlist
+};
+NETGRAPH_INIT(eiface, &typestruct);
+
+static char     ng_eiface_ifname[] = NG_EIFACE_EIFACE_NAME;
+
+/* We keep a bitmap indicating which unit numbers are free.
+   One means the unit number is free, zero means it's taken. */
+static int	*ng_eiface_units = NULL;
+static int	ng_eiface_units_len = 0;
+static int	ng_units_in_use = 0;
+
+#define UNITS_BITSPERWORD	(sizeof(*ng_eiface_units) * NBBY)
+
+
+/************************************************************************
+			HELPER STUFF
+ ************************************************************************/
+/*
+ * Find the first free unit number for a new interface.
+ * Increase the size of the unit bitmap as necessary.
+ */
+static __inline__ int
+ng_eiface_get_unit(int *unit)
+{
+	int index, bit;
+
+	for (index = 0; index < ng_eiface_units_len
+	    && ng_eiface_units[index] == 0; index++);
+	if (index == ng_eiface_units_len) {		/* extend array */
+		int i, *newarray, newlen;
+
+		newlen = (2 * ng_eiface_units_len) + 4;
+		MALLOC(newarray, int *, newlen * sizeof(*ng_eiface_units),
+		    M_NETGRAPH, M_NOWAIT);
+		if (newarray == NULL)
+			return (ENOMEM);
+		bcopy(ng_eiface_units, newarray,
+		    ng_eiface_units_len * sizeof(*ng_eiface_units));
+		for (i = ng_eiface_units_len; i < newlen; i++)
+			newarray[i] = ~0;
+		if (ng_eiface_units != NULL)
+			FREE(ng_eiface_units, M_NETGRAPH);
+		ng_eiface_units = newarray;
+		ng_eiface_units_len = newlen;
+	}
+	bit = ffs(ng_eiface_units[index]) - 1;
+	KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
+	    ("%s: word=%d bit=%d", __FUNCTION__, ng_eiface_units[index], bit));
+	ng_eiface_units[index] &= ~(1 << bit);
+	*unit = (index * UNITS_BITSPERWORD) + bit;
+	ng_units_in_use++;
+	return (0);
+}
+
+/*
+ * Free a no longer needed unit number.
+ */
+static __inline__ void
+ng_eiface_free_unit(int unit)
+{
+	int index, bit;
+
+	index = unit / UNITS_BITSPERWORD;
+	bit = unit % UNITS_BITSPERWORD;
+	KASSERT(index < ng_eiface_units_len,
+	    ("%s: unit=%d len=%d", __FUNCTION__, unit, ng_eiface_units_len));
+	KASSERT((ng_eiface_units[index] & (1 << bit)) == 0,
+	    ("%s: unit=%d is free", __FUNCTION__, unit));
+	ng_eiface_units[index] |= (1 << bit);
+	/*
+	 * XXX We could think about reducing the size of ng_eiface_units[]
+	 * XXX here if the last portion is all ones
+	 * XXX At least free it if no more units.
+	 * Needed if we are to eventually be able to unload.
+	 */
+	ng_units_in_use--;
+	if (ng_units_in_use == 0) { /* XXX make SMP safe */
+		FREE(ng_eiface_units, M_NETGRAPH);
+		ng_eiface_units_len = 0;
+		ng_eiface_units = NULL;
+	}
+}
+
+/************************************************************************
+			INTERFACE STUFF
+ ************************************************************************/
+
+/*
+ * Process an ioctl for the virtual interface
+ */
+static int
+ng_eiface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
+{
+	struct ifreq   *const ifr = (struct ifreq *)data;
+	int		s, error = 0;
+
+#ifdef DEBUG
+	ng_eiface_print_ioctl(ifp, command, data);
+#endif
+	s = splimp();
+	switch (command)
+	{
+	/* These two are mostly handled at a higher layer */
+	case SIOCSIFADDR:
+		error = ether_ioctl(ifp, command, data);
+		break;
+	case SIOCGIFADDR:
+		break;
+
+	/* Set flags */
+	case SIOCSIFFLAGS:
+		/*
+		 * If the interface is marked up and stopped, then
+		 * start it. If it is marked down and running,
+		 * then stop it.
+		 */
+		if (ifr->ifr_flags & IFF_UP) {
+			if (!(ifp->if_flags & IFF_RUNNING)) {
+				ifp->if_flags &= ~(IFF_OACTIVE);
+				ifp->if_flags |= IFF_RUNNING;
+			}
+		} else {
+			if (ifp->if_flags & IFF_RUNNING)
+				ifp->if_flags
+					&= ~(IFF_RUNNING | IFF_OACTIVE);
+		}
+		break;
+
+	/* Set the interface MTU */
+	case SIOCSIFMTU:
+		if (ifr->ifr_mtu > NG_EIFACE_MTU_MAX
+		|| ifr->ifr_mtu < NG_EIFACE_MTU_MIN)
+			error = EINVAL;
+		else
+			ifp->if_mtu = ifr->ifr_mtu;
+		break;
+
+	/* Stuff that's not supported */
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+		error = 0;
+		break;
+	case SIOCSIFPHYS:
+		error = EOPNOTSUPP;
+		break;
+
+	default:
+		error = EINVAL;
+		break;
+	}
+	(void)splx(s);
+	return (error);
+}
+
+static void
+ng_eiface_init(void *xsc)
+{
+	priv_p		sc = xsc;
+	struct ifnet   *ifp = sc->ifp;
+	int		s;
+
+	s = splimp();
+
+	ifp->if_flags |= IFF_RUNNING;
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+	splx(s);
+}
+
+/*
+ * This routine is called to deliver a packet out the interface. We simply
+ * relay the packet to the ether hook, if it is connected.
+ */
+static void
+ng_eiface_start(struct ifnet *ifp)
+{
+	const priv_p priv = (priv_p) ifp->if_softc;
+	int		len, error = 0;
+	struct mbuf    *m;
+
+	/* Check interface flags */
+	if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING))
+		return;
+
+	/* Don't do anything if output is active */
+	if (ifp->if_flags & IFF_OACTIVE)
+		return;
+
+	ifp->if_flags |= IFF_OACTIVE;
+
+	/*
+	 * Grab a packet to transmit.
+	 */
+	IF_DEQUEUE(&ifp->if_snd, m);
+
+	/* If there's nothing to send, return. */
+	if (m == NULL) {
+		ifp->if_flags &= ~IFF_OACTIVE;
+		return;
+	}
+
+	/* Berkeley packet filter
+	 * Pass packet to bpf if there is a listener.
+	 */
+	if (ifp->if_bpf)
+		bpf_mtap(ifp, m);
+
+	/* Copy length before the mbuf gets invalidated */
+	len = m->m_pkthdr.len;
+
+	/*
+	 * Send packet; if hook is not connected, mbuf will get
+	 * freed.
+	 */
+	NG_SEND_DATA_ONLY(error, priv->ether, m);
+
+	/* Update stats */
+	if (error == 0) {
+		ifp->if_obytes += len;
+		ifp->if_opackets++;
+	}
+	ifp->if_flags &= ~IFF_OACTIVE;
+	return;
+}
+
+#ifdef DEBUG
+/*
+ * Display an ioctl to the virtual interface
+ */
+
+static void
+ng_eiface_print_ioctl(struct ifnet *ifp, int command, caddr_t data){
+	char		*str;
+
+	switch (command & IOC_DIRMASK)
+	{
+	case IOC_VOID:
+		str = "IO";
+		break;
+	case IOC_OUT:
+		str = "IOR";
+		break;
+	case IOC_IN:
+		str = "IOW";
+		break;
+	case IOC_INOUT:
+		str = "IORW";
+		break;
+	default:
+		str = "IO??";
+	}
+	log(LOG_DEBUG, "%s%d: %s('%c', %d, char[%d])\n",
+			ifp->if_name, ifp->if_unit,
+			str,
+			IOCGROUP(command),
+			command & 0xff,
+			IOCPARM_LEN(command));
+}
+#endif	/* DEBUG */
+
+/************************************************************************
+			NETGRAPH NODE STUFF
+ ************************************************************************/
+
+/*
+ * Constructor for a node
+ */
+static int
+ng_eiface_constructor(node_p node)
+{
+	struct ifnet   *ifp;
+	priv_p		priv;
+	int		error = 0;
+
+	/* Allocate node and interface private structures */
+	MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_WAITOK);
+	if (priv == NULL) {
+		return (ENOMEM);
+	}
+	bzero(priv, sizeof(*priv));
+
+	ifp = &(priv->arpcom.ac_if);
+
+	/* Link them together */
+	ifp->if_softc = priv;
+	priv->ifp = ifp;
+
+	/* Get an interface unit number */
+	if ((error = ng_eiface_get_unit(&priv->unit)) != 0) {
+		FREE(priv, M_NETGRAPH);
+		return (error);
+	}
+
+	/* Link together node and private info */
+	NG_NODE_SET_PRIVATE(node, priv);
+	priv->node = node;
+
+	/* Initialize interface structure */
+	ifp->if_name = ng_eiface_ifname;
+	ifp->if_unit = priv->unit;
+	ifp->if_init = ng_eiface_init;
+	ifp->if_output = ether_output;
+	ifp->if_start = ng_eiface_start;
+	ifp->if_ioctl = ng_eiface_ioctl;
+	ifp->if_watchdog = NULL;
+	ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
+	ifp->if_flags = (IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST);
+
+	/*
+	 * Give this node name * bzero(ifname, sizeof(ifname));
+	 * sprintf(ifname, "if%s%d", ifp->if_name, ifp->if_unit); (void)
+	 * ng_name_node(node, ifname);
+	 */
+
+	/* Attach the interface */
+	ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
+
+	/* Done */
+	return (0);
+}
+
+/*
+ * Give our ok for a hook to be added
+ */
+static int
+ng_eiface_newhook(node_p node, hook_p hook, const char *name)
+{
+	priv_p		priv = NG_NODE_PRIVATE(node);
+
+	if (strcmp(name, NG_EIFACE_HOOK_ETHER))
+		return (EPFNOSUPPORT);
+	if (priv->ether != NULL)
+		return (EISCONN);
+	priv->ether = hook;
+	NG_HOOK_SET_PRIVATE(hook, &priv->ether);
+
+	return (0);
+}
+
+/*
+ * Receive a control message
+ */
+static int
+ng_eiface_rcvmsg(node_p node, item_p item, hook_p lasthook)
+{
+	priv_p		priv = NG_NODE_PRIVATE(node);
+	struct ifnet   *const ifp = priv->ifp;
+	struct ng_mesg *resp = NULL;
+	int		error = 0;
+	struct ng_mesg *msg;
+
+	NGI_GET_MSG(item, msg);
+	switch		(msg->header.typecookie) {
+	case NGM_EIFACE_COOKIE:
+		switch (msg->header.cmd) {
+		case NGM_EIFACE_SET:
+		{
+			struct ng_eiface_par *eaddr;
+
+			if (msg->header.arglen != sizeof(struct ng_eiface_par)){
+				error = EINVAL;
+				break;
+			}
+			eaddr = (struct ng_eiface_par *)(msg->data);
+
+			priv->arpcom.ac_enaddr[0] = eaddr->oct0;
+			priv->arpcom.ac_enaddr[1] = eaddr->oct1;
+			priv->arpcom.ac_enaddr[2] = eaddr->oct2;
+			priv->arpcom.ac_enaddr[3] = eaddr->oct3;
+			priv->arpcom.ac_enaddr[4] = eaddr->oct4;
+			priv->arpcom.ac_enaddr[5] = eaddr->oct5;
+
+			break;
+		}
+
+		case NGM_EIFACE_GET_IFNAME:
+		{
+			struct ng_eiface_ifname *arg;
+
+			NG_MKRESPONSE(resp, msg, sizeof(*arg), M_NOWAIT);
+			if (resp == NULL) {
+				error = ENOMEM;
+				break;
+			}
+			arg = (struct ng_eiface_ifname *)resp->data;
+			sprintf(arg->ngif_name,
+				"%s%d", ifp->if_name, ifp->if_unit);
+			break;
+		}
+
+		case NGM_EIFACE_GET_IFADDRS:
+		{
+			struct ifaddr  *ifa;
+			caddr_t		ptr;
+			int		buflen;
+
+#define SA_SIZE(s)	((s)->sa_len<sizeof(*(s))? sizeof(*(s)):(s)->sa_len)
+
+			/* Determine size of response and allocate it */
+			buflen = 0;
+			TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
+			buflen += SA_SIZE(ifa->ifa_addr);
+			NG_MKRESPONSE(resp, msg, buflen, M_NOWAIT);
+			if (resp == NULL) {
+				error = ENOMEM;
+				break;
+			}
+			/* Add addresses */
+			ptr = resp->data;
+			TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
+				const int       len = SA_SIZE(ifa->ifa_addr);
+
+				if (buflen < len) {
+					log(LOG_ERR, "%s%d: len changed?\n",
+					ifp->if_name, ifp->if_unit);
+					break;
+				}
+				bcopy(ifa->ifa_addr, ptr, len);
+				ptr += len;
+				buflen -= len;
+			}
+			break;
+#undef SA_SIZE
+		}
+
+		default:
+			error = EINVAL;
+			break;
+		} /* end of inner switch() */
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+	NG_RESPOND_MSG(error, node, item, resp);
+	NG_FREE_MSG(msg);
+	return (error);
+}
+
+/*
+ * Recive data from a hook. Pass the packet to the ether_input routine.
+ */
+static int
+ng_eiface_rcvdata(hook_p hook, item_p item)
+{
+	priv_p		priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
+	struct ifnet   *const ifp = priv->ifp;
+	int		s, error = 0;
+	struct ether_header *eh;
+	u_short		ether_type;
+	struct mbuf *m;
+
+	NGI_GET_M(item, m);
+	/* Meta-data ends its life here... */
+        NG_FREE_ITEM(item);
+
+	if (m == NULL)
+	{
+		printf("ng_eiface: mbuf is null.\n");
+		return (EINVAL);
+	}
+	if (!(ifp->if_flags & IFF_UP)) {
+		return (ENETDOWN);
+	}
+
+	/* Note receiving interface */
+	m->m_pkthdr.rcvif = ifp;
+
+	/* Update interface stats */
+	ifp->if_ipackets++;
+
+	eh = mtod(m, struct ether_header *);
+	ether_type = ntohs(eh->ether_type);
+
+	s = splimp();
+	m->m_pkthdr.len -= sizeof(*eh);
+	m->m_len -= sizeof(*eh);
+	if (m->m_len) {
+		m->m_data += sizeof(*eh);
+	} else {
+		if (ether_type == ETHERTYPE_ARP) {
+			m->m_len = m->m_next->m_len;
+			m->m_data = m->m_next->m_data;
+		}
+	}
+	splx(s);
+
+	ether_input(ifp, eh, m);
+
+	/* Done */
+	return (error);
+}
+
+/*
+ * the node.
+ */
+static int
+ng_eiface_rmnode(node_p node)
+{
+	priv_p		priv = NG_NODE_PRIVATE(node);
+	struct ifnet   *const ifp = priv->ifp;
+
+	ether_ifdetach(ifp, ETHER_BPF_SUPPORTED);
+	ng_eiface_free_unit(priv->unit);
+	FREE(priv, M_NETGRAPH);
+	NG_NODE_SET_PRIVATE(node, NULL);
+	NG_NODE_UNREF(node);
+	return (0);
+}
+
+
+/*
+ * This is called once we've already connected a new hook to the other node.
+ * It gives us a chance to balk at the last minute.
+ */
+static int
+ng_eiface_connect(hook_p hook)
+{
+	/* be really amiable and just say "YUP that's OK by me! " */
+	return (0);
+}
+
+/*
+ * Hook disconnection
+ */
+static int
+ng_eiface_disconnect(hook_p hook)
+{
+	priv_p		priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
+
+	priv->ether = NULL;
+	return (0);
+}
diff --git a/sys/netgraph/ng_eiface.h b/sys/netgraph/ng_eiface.h
new file mode 100644
index 0000000..493c0cb
--- /dev/null
+++ b/sys/netgraph/ng_eiface.h
@@ -0,0 +1,100 @@
+/*
+ * ng_eiface.h
+ *
+ * Copyright (c) 1999-2001, Vitaly V Belekhov
+ * 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 unmodified, 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * 	$FreeBSD$
+ */
+
+#ifndef _NETGRAPH_EIFACE_H_
+#define _NETGRAPH_EIFACE_H_
+
+/* Node type name and magic cookie */
+#define NG_EIFACE_NODE_TYPE		"eiface"
+#define NGM_EIFACE_COOKIE		948105892
+
+/* Interface base name */
+#define NG_EIFACE_EIFACE_NAME		"nge"
+#define NG_EIFACE_EIFACE_NAME_MAX	15
+
+/* My hook names */
+#define NG_EIFACE_HOOK_ETHER		"ether"
+
+/* MTU bounds */
+#define NG_EIFACE_MTU_MIN		72
+#define NG_EIFACE_MTU_MAX		2312
+#define NG_EIFACE_MTU_DEFAULT		1500
+
+/* Netgraph commands */
+enum {
+	NGM_EIFACE_GET_IFNAME = 1,	/* returns struct ng_eiface_ifname */
+	NGM_EIFACE_GET_IFADDRS,		/* returns list of addresses */
+	NGM_EIFACE_SET,			/* set ethernet address */
+};
+
+struct ng_eiface_ifname {
+	char    ngif_name[NG_EIFACE_EIFACE_NAME_MAX + 1];
+};
+
+struct ng_eiface_par {
+    u_char oct0;
+    u_char oct1;
+    u_char oct2;
+    u_char oct3;
+    u_char oct4;
+    u_char oct5;
+};
+
+static const struct ng_parse_struct_info ng_eiface_par_fields = {
+  {
+    { "oct0",		&ng_parse_int8_type	},
+    { "oct1",		&ng_parse_int8_type	},
+    { "oct2",		&ng_parse_int8_type	},
+    { "oct3",		&ng_parse_int8_type	},
+    { "oct4",		&ng_parse_int8_type	},
+    { "oct5",		&ng_parse_int8_type	},
+    { NULL },
+  }
+};
+
+static const struct ng_parse_type ng_eiface_par_type = {
+	&ng_parse_struct_type,
+	&ng_eiface_par_fields
+};
+
+static const struct ng_cmdlist ng_eiface_cmdlist[] = {
+	{
+	  NGM_EIFACE_COOKIE,
+	  NGM_EIFACE_SET,
+	  "set",
+	  &ng_eiface_par_type,
+	  NULL
+	},
+	{ 0 }
+};
+
+
+#endif /* _NETGRAPH_EIFACE_H_ */