initial import of NetBSD tree

3 files changed, 1087 insertions, 0 deletions

diff --git a/sbin/ifconfig/Makefile b/sbin/ifconfig/Makefile
new file mode 100644
index 00000000000..cfc07b3fd2d
--- /dev/null
+++ b/sbin/ifconfig/Makefile
@@ -0,0 +1,7 @@
+#	$NetBSD: Makefile,v 1.7 1995/03/18 14:56:21 cgd Exp $
+#	@(#)Makefile	8.1 (Berkeley) 6/5/93
+
+PROG=	ifconfig
+MAN=	ifconfig.8
+
+.include <bsd.prog.mk>
diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8
new file mode 100644
index 00000000000..4b11a6ff9ee
--- /dev/null
+++ b/sbin/ifconfig/ifconfig.8
@@ -0,0 +1,284 @@
+.\"	$NetBSD: ifconfig.8,v 1.10 1995/03/18 14:56:23 cgd Exp $
+.\"
+.\" Copyright (c) 1983, 1991, 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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.
+.\"
+.\"     @(#)ifconfig.8	8.3 (Berkeley) 1/5/94
+.\"
+.Dd January 5, 1994
+.Dt IFCONFIG 8
+.Os BSD 4.2
+.Sh NAME
+.Nm ifconfig
+.Nd configure network interface parameters
+.Sh SYNOPSIS
+.Nm ifconfig
+.Ar interface address_family
+.Oo
+.Ar address
+.Op Ar dest_address
+.Oc
+.Op Ar parameters
+.Nm ifconfig
+.Ar interface
+.Op Ar protocol_family
+.Sh DESCRIPTION
+.Nm Ifconfig
+is used to assign an address
+to a network interface and/or configure
+network interface parameters.
+.Nm Ifconfig
+must be used at boot time to define the network address
+of each interface present on a machine; it may also be used at
+a later time to redefine an interface's address
+or other operating parameters.
+.Pp
+Available operands for
+.Nm ifconfig:
+.Bl -tag -width Ds
+.It Ar Address
+For the
+.Tn DARPA-Internet
+family,
+the address is either a host name present in the host name data
+base, 
+.Xr hosts 5 ,
+or a
+.Tn DARPA
+Internet address expressed in the Internet standard
+.Dq dot notation .
+For the Xerox Network Systems(tm) family,
+addresses are 
+.Ar net:a.b.c.d.e.f ,
+where
+.Ar net
+is the assigned network number (in decimal),
+and each of the six bytes of the host number,
+.Ar a
+through
+.Ar f ,
+are specified in hexadecimal.
+The host number may be omitted on 10Mb/s Ethernet interfaces,
+which use the hardware physical address,
+and on interfaces other than the first.
+For the
+.Tn ISO
+family, addresses are specified as a long hexadecimal string,
+as in the Xerox family.  However, two consecutive dots imply a zero
+byte, and the dots are optional, if the user wishes to (carefully)
+count out long strings of digits in network byte order.
+.It Ar address_family
+Specifies the
+.Ar address family
+which affects interpretation of the remaining parameters.
+Since an interface can receive transmissions in differing protocols
+with different naming schemes, specifying the address family is recommended.
+The address or protocol families currently
+supported are
+.Dq inet ,
+.Dq iso ,
+and
+.Dq ns .
+.It Ar Interface
+The
+.Ar interface
+parameter is a string of the form
+.Dq name unit ,
+for example,
+.Dq en0 
+.El
+.Pp
+The following parameters may be set with 
+.Nm ifconfig :
+.Bl -tag -width dest_addressxx
+.It Cm alias
+Establish an additional network address for this interface.
+This is sometimes useful when changing network numbers, and
+one wishes to accept packets addressed to the old interface.
+.It Cm arp
+Enable the use of the Address Resolution Protocol in mapping
+between network level addresses and link level addresses (default).
+This is currently implemented for mapping between
+.Tn DARPA
+Internet
+addresses and 10Mb/s Ethernet addresses.
+.It Fl arp
+Disable the use of the Address Resolution Protocol.
+.It Cm broadcast
+(Inet only)
+Specify the address to use to represent broadcasts to the
+network.
+The default broadcast address is the address with a host part of all 1's.
+.It Cm debug
+Enable driver dependent debugging code; usually, this turns on
+extra console error logging.
+.It Fl debug
+Disable driver dependent debugging code.
+.It Cm delete
+Remove the network address specified.
+This would be used if you incorrectly specified an alias, or it
+was no longer needed.
+If you have incorrectly set an NS address having the side effect
+of specifying the host portion, removing all NS addresses will
+allow you to respecify the host portion.
+.It Cm dest_address
+Specify the address of the correspondent on the other end
+of a point to point link.
+.It Cm down
+Mark an interface ``down''.  When an interface is
+marked ``down'', the system will not attempt to
+transmit messages through that interface. 
+If possible, the interface will be reset to disable reception as well.
+This action does not automatically disable routes using the interface.
+.It Cm ipdst
+This is used to specify an Internet host who is willing to receive
+ip packets encapsulating NS packets bound for a remote network.
+An apparent point to point link is constructed, and
+the address specified will be taken as the NS address and network
+of the destination.
+IP encapsulation of
+.Tn CLNP
+packets is done differently.
+.It Cm metric Ar n
+Set the routing metric of the interface to
+.Ar n ,
+default 0.
+The routing metric is used by the routing protocol
+.Pq Xr routed 8 .
+Higher metrics have the effect of making a route
+less favorable; metrics are counted as addition hops
+to the destination network or host.
+.It Cm netmask Ar mask
+(Inet and ISO)
+Specify how much of the address to reserve for subdividing
+networks into sub-networks.
+The mask includes the network part of the local address
+and the subnet part, which is taken from the host field of the address.
+The mask can be specified as a single hexadecimal number
+with a leading 0x, with a dot-notation Internet address,
+or with a pseudo-network name listed in the network table
+.Xr networks 5 .
+The mask contains 1's for the bit positions in the 32-bit address
+which are to be used for the network and subnet parts,
+and 0's for the host part.
+The mask should contain at least the standard network portion,
+and the subnet field should be contiguous with the network
+portion.
+.\" see 
+.\" Xr eon 5 .
+.It Cm nsellength Ar n
+.Pf ( Tn ISO
+only)
+This specifies a trailing number of bytes for a received
+.Tn NSAP
+used for local identification, the remaining leading part of which is
+taken to be the
+.Tn NET
+(Network Entity Title).
+The default value is 1, which is conformant to US
+.Tn GOSIP .
+When an ISO address is set in an ifconfig command,
+it is really the
+.Tn NSAP
+which is being specified.
+For example, in
+.Tn US GOSIP ,
+20 hex digits should be
+specified in the
+.Tn ISO NSAP
+to be assigned to the interface.
+There is some evidence that a number different from 1 may be useful
+for
+.Tn AFI
+37 type addresses.
+.It Cm trailers
+Request the use of a ``trailer'' link level encapsulation when
+sending (default).
+If a network interface supports
+.Cm trailers ,
+the system will, when possible, encapsulate outgoing
+messages in a manner which minimizes the number of
+memory to memory copy operations performed by the receiver.
+On networks that support the Address Resolution Protocol (see
+.Xr arp 4 ;
+currently, only 10 Mb/s Ethernet),
+this flag indicates that the system should request that other
+systems use trailers when sending to this host.
+Similarly, trailer encapsulations will be sent to other
+hosts that have made such requests.
+Currently used by Internet protocols only.
+.It Fl trailers
+Disable the use of a ``trailer'' link level encapsulation.
+.It Cm link[0-2]
+Enable special processing of the link level of the interface.
+These three options are interface specific in actual effect, however,
+they are in general used to select special modes of operation. An example
+of this is to enable SLIP compression, or to select the connector type
+for some ethernet cards.  Refer to the man page for the specific driver
+for more information.
+.It Fl link[0-2]
+Disable special processing at the link level with the specified interface.
+.It Cm up
+Mark an interface ``up''. 
+This may be used to enable an interface after an ``ifconfig down.''
+It happens automatically when setting the first address on an interface.
+If the interface was reset when previously marked down,
+the hardware will be re-initialized.
+.El
+.Pp
+.Pp
+.Nm Ifconfig
+displays the current configuration for a network interface
+when no optional parameters are supplied.
+If a protocol family is specified,
+Ifconfig will report only the details specific to that protocol family.
+.Pp
+The interface name
+.Ar -a
+is reserved, and causes information on all interfaces to be displayed.
+The protocol family may be specified as well.
+.Pp
+Only the super-user may modify the configuration of a network interface.
+.Sh DIAGNOSTICS
+Messages indicating the specified interface does not exit, the
+requested address is unknown, or the user is not privileged and
+tried to alter an interface's configuration.
+.Sh SEE ALSO
+.Xr netstat 1 ,
+.Xr netintro 4 ,
+.Xr rc 8 ,
+.Xr routed 8 ,
+.\" .Xr eon 5
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.2 .
diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
new file mode 100644
index 00000000000..083568e85d9
--- /dev/null
+++ b/sbin/ifconfig/ifconfig.c
@@ -0,0 +1,796 @@
+/*	$NetBSD: ifconfig.c,v 1.21 1995/10/08 23:03:54 gwr Exp $	*/
+
+/*
+ * Copyright (c) 1983, 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1983, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)ifconfig.c	8.2 (Berkeley) 2/16/94";
+#else
+static char rcsid[] = "$NetBSD: ifconfig.c,v 1.21 1995/10/08 23:03:54 gwr Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define	NSIP
+#include <netns/ns.h>
+#include <netns/ns_if.h>
+#include <netdb.h>
+
+#define EON
+#include <netiso/iso.h>
+#include <netiso/iso_var.h>
+#include <sys/protosw.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+struct	ifreq		ifr, ridreq;
+struct	ifaliasreq	addreq;
+struct	iso_ifreq	iso_ridreq;
+struct	iso_aliasreq	iso_addreq;
+struct	sockaddr_in	netmask;
+char	name[30];
+int	flags, metric, setaddr, setipdst, doalias;
+int	clearaddr, s;
+int	newaddr = 1;
+int	nsellength = 1;
+int	af = AF_INET;
+
+void 	notealias __P((char *, int));
+void 	notrailers __P((char *, int));
+void 	setifaddr __P((char *, int));
+void 	setifdstaddr __P((char *, int));
+void 	setifflags __P((char *, int));
+void 	setifbroadaddr __P((char *));
+void 	setifipdst __P((char *));
+void 	setifmetric __P((char *));
+void 	setifnetmask __P((char *));
+void 	setnsellength __P((char *));
+void 	setsnpaoffset __P((char *));
+
+#define	NEXTARG		0xffffff
+
+struct	cmd {
+	char	*c_name;
+	int	c_parameter;		/* NEXTARG means next argv */
+	void	(*c_func)();
+} cmds[] = {
+	{ "up",		IFF_UP,		setifflags } ,
+	{ "down",	-IFF_UP,	setifflags },
+	{ "trailers",	-1,		notrailers },
+	{ "-trailers",	1,		notrailers },
+	{ "arp",	-IFF_NOARP,	setifflags },
+	{ "-arp",	IFF_NOARP,	setifflags },
+	{ "debug",	IFF_DEBUG,	setifflags },
+	{ "-debug",	-IFF_DEBUG,	setifflags },
+	{ "alias",	IFF_UP,		notealias },
+	{ "-alias",	-IFF_UP,	notealias },
+	{ "delete",	-IFF_UP,	notealias },
+#ifdef notdef
+#define	EN_SWABIPS	0x1000
+	{ "swabips",	EN_SWABIPS,	setifflags },
+	{ "-swabips",	-EN_SWABIPS,	setifflags },
+#endif
+	{ "netmask",	NEXTARG,	setifnetmask },
+	{ "metric",	NEXTARG,	setifmetric },
+	{ "broadcast",	NEXTARG,	setifbroadaddr },
+	{ "ipdst",	NEXTARG,	setifipdst },
+#ifndef INET_ONLY
+	{ "snpaoffset",	NEXTARG,	setsnpaoffset },
+	{ "nsellength",	NEXTARG,	setnsellength },
+#endif	/* INET_ONLY */
+	{ "link0",	IFF_LINK0,	setifflags } ,
+	{ "-link0",	-IFF_LINK0,	setifflags } ,
+	{ "link1",	IFF_LINK1,	setifflags } ,
+	{ "-link1",	-IFF_LINK1,	setifflags } ,
+	{ "link2",	IFF_LINK2,	setifflags } ,
+	{ "-link2",	-IFF_LINK2,	setifflags } ,
+	{ 0,		0,		setifaddr },
+	{ 0,		0,		setifdstaddr },
+};
+
+void 	adjust_nsellength();
+int	getinfo __P((struct ifreq *));
+void	getsock __P((int));
+void	printall __P((void));
+void 	printb __P((char *, unsigned short, char *));
+void 	status();
+void 	usage();
+
+/*
+ * XNS support liberally adapted from code written at the University of
+ * Maryland principally by James O'Toole and Chris Torek.
+ */
+void	in_status __P((int));
+void 	in_getaddr __P((char *, int));
+void 	xns_status __P((int));
+void 	xns_getaddr __P((char *, int));
+void 	iso_status __P((int));
+void 	iso_getaddr __P((char *, int));
+
+/* Known address families */
+struct afswtch {
+	char *af_name;
+	short af_af;
+	void (*af_status)();
+	void (*af_getaddr)();
+	u_long af_difaddr;
+	u_long af_aifaddr;
+	caddr_t af_ridreq;
+	caddr_t af_addreq;
+} afs[] = {
+#define C(x) ((caddr_t) &x)
+	{ "inet", AF_INET, in_status, in_getaddr,
+	     SIOCDIFADDR, SIOCAIFADDR, C(ridreq), C(addreq) },
+#ifndef INET_ONLY	/* small version, for boot media */
+	{ "ns", AF_NS, xns_status, xns_getaddr,
+	     SIOCDIFADDR, SIOCAIFADDR, C(ridreq), C(addreq) },
+	{ "iso", AF_ISO, iso_status, iso_getaddr,
+	     SIOCDIFADDR_ISO, SIOCAIFADDR_ISO, C(iso_ridreq), C(iso_addreq) },
+#endif	/* INET_ONLY */
+	{ 0,	0,	    0,		0 }
+};
+
+struct afswtch *afp;	/*the address family being set or asked about*/
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register struct afswtch *rafp;
+	int aflag = 0;
+
+	if (argc < 2) 
+		usage();
+	argc--, argv++;
+	if (!strcmp(*argv, "-a"))
+		aflag = 1;
+	else
+		strncpy(name, *argv, sizeof(name));
+	argc--, argv++;
+	if (argc > 0) {
+		for (afp = rafp = afs; rafp->af_name; rafp++)
+			if (strcmp(rafp->af_name, *argv) == 0) {
+				afp = rafp; argc--; argv++;
+				break;
+			}
+		rafp = afp;
+		af = ifr.ifr_addr.sa_family = rafp->af_af;
+	}
+	if (aflag) {
+		if (argc > 0)
+			usage();
+		printall();
+		exit(0);
+	}
+	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
+	if (getinfo(&ifr) < 0)
+		exit(1);
+	if (argc == 0) {
+		status();
+		exit(0);
+	}
+	while (argc > 0) {
+		register struct cmd *p;
+
+		for (p = cmds; p->c_name; p++)
+			if (strcmp(*argv, p->c_name) == 0)
+				break;
+		if (p->c_name == 0 && setaddr)
+			p++;	/* got src, do dst */
+		if (p->c_func) {
+			if (p->c_parameter == NEXTARG) {
+				if (argv[1] == NULL)
+					errx(1, "'%s' requires argument",
+					    p->c_name);
+				(*p->c_func)(argv[1]);
+				argc--, argv++;
+			} else
+				(*p->c_func)(*argv, p->c_parameter);
+		}
+		argc--, argv++;
+	}
+
+#ifndef INET_ONLY
+
+	if (af == AF_ISO)
+		adjust_nsellength();
+	if (setipdst && af==AF_NS) {
+		struct nsip_req rq;
+		int size = sizeof(rq);
+
+		rq.rq_ns = addreq.ifra_addr;
+		rq.rq_ip = addreq.ifra_dstaddr;
+
+		if (setsockopt(s, 0, SO_NSIP_ROUTE, &rq, size) < 0)
+			warn("encapsulation routing");
+	}
+
+#endif	/* INET_ONLY */
+
+	if (clearaddr) {
+		int ret;
+		strncpy(rafp->af_ridreq, name, sizeof ifr.ifr_name);
+		if ((ret = ioctl(s, rafp->af_difaddr, rafp->af_ridreq)) < 0) {
+			if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
+				/* means no previous address for interface */
+			} else
+				warn("SIOCDIFADDR");
+		}
+	}
+	if (newaddr) {
+		strncpy(rafp->af_addreq, name, sizeof ifr.ifr_name);
+		if (ioctl(s, rafp->af_aifaddr, rafp->af_addreq) < 0)
+			warn("SIOCAIFADDR");
+	}
+	exit(0);
+}
+
+void
+getsock(naf)
+	int naf;
+{
+	static int oaf = -1;
+
+	if (oaf == naf)
+		return;
+	if (oaf != -1)
+		close(s);
+	s = socket(naf, SOCK_DGRAM, 0);
+	if (s < 0)
+		oaf = -1;
+	else
+		oaf = naf;
+}
+
+int
+getinfo(ifr)
+	struct ifreq *ifr;
+{
+
+	getsock(af);
+	if (s < 0)
+		err(1, "socket");
+	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)ifr) < 0) {
+		warn("SIOCGIFFLAGS");
+		return (-1);
+	}
+	flags = ifr->ifr_flags;
+	if (ioctl(s, SIOCGIFMETRIC, (caddr_t)ifr) < 0) {
+		warn("SIOCGIFMETRIC");
+		metric = 0;
+	} else
+		metric = ifr->ifr_metric;
+	return (0);
+}
+
+void
+printall()
+{
+	char inbuf[8192];
+	struct ifconf ifc;
+	struct ifreq ifreq, *ifr;
+	int i;
+
+	ifc.ifc_len = sizeof(inbuf);
+	ifc.ifc_buf = inbuf;
+	getsock(af);
+	if (s < 0)
+		err(1, "socket");
+	if (ioctl(s, SIOCGIFCONF, &ifc) < 0)
+		err(1, "SIOCGIFCONF");
+	ifr = ifc.ifc_req;
+	ifreq.ifr_name[0] = '\0';
+	for (i = 0; i < ifc.ifc_len; ) {
+		ifr = (struct ifreq *)((caddr_t)ifc.ifc_req + i);
+		i += sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len;
+		if (!strncmp(ifreq.ifr_name, ifr->ifr_name,
+			     sizeof(ifr->ifr_name)))
+			continue;
+		strncpy(name, ifr->ifr_name, sizeof(ifr->ifr_name));
+		ifreq = *ifr;
+		if (getinfo(&ifreq) < 0)
+			continue;
+		status();
+	}
+}
+
+#define RIDADDR 0
+#define ADDR	1
+#define MASK	2
+#define DSTADDR	3
+
+/*ARGSUSED*/
+void
+setifaddr(addr, param)
+	char *addr;
+	int param;
+{
+	/*
+	 * Delay the ioctl to set the interface addr until flags are all set.
+	 * The address interpretation may depend on the flags,
+	 * and the flags may change when the address is set.
+	 */
+	setaddr++;
+	if (doalias == 0)
+		clearaddr = 1;
+	(*afp->af_getaddr)(addr, (doalias >= 0 ? ADDR : RIDADDR));
+}
+
+void
+setifnetmask(addr)
+	char *addr;
+{
+	(*afp->af_getaddr)(addr, MASK);
+}
+
+void
+setifbroadaddr(addr)
+	char *addr;
+{
+	(*afp->af_getaddr)(addr, DSTADDR);
+}
+
+void
+setifipdst(addr)
+	char *addr;
+{
+	in_getaddr(addr, DSTADDR);
+	setipdst++;
+	clearaddr = 0;
+	newaddr = 0;
+}
+
+#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
+/*ARGSUSED*/
+void
+notealias(addr, param)
+	char *addr;
+	int param;
+{
+	if (setaddr && doalias == 0 && param < 0)
+		memcpy(rqtosa(af_ridreq),
+		       rqtosa(af_addreq),
+		       rqtosa(af_addreq)->sa_len);
+	doalias = param;
+	if (param < 0) {
+		clearaddr = 1;
+		newaddr = 0;
+	} else
+		clearaddr = 0;
+}
+
+/*ARGSUSED*/
+void
+notrailers(vname, value)
+	char *vname;
+	int value;
+{
+	printf("Note: trailers are no longer sent, but always received\n");
+}
+
+/*ARGSUSED*/
+void
+setifdstaddr(addr, param)
+	char *addr;
+	int param;
+{
+	(*afp->af_getaddr)(addr, DSTADDR);
+}
+
+void
+setifflags(vname, value)
+	char *vname;
+	int value;
+{
+ 	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0)
+		err(1, "SIOCGIFFLAGS");
+	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+ 	flags = ifr.ifr_flags;
+
+	if (value < 0) {
+		value = -value;
+		flags &= ~value;
+	} else
+		flags |= value;
+	ifr.ifr_flags = flags;
+	if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0)
+		err(1, "SIOCSIFFLAGS");
+}
+
+void
+setifmetric(val)
+	char *val;
+{
+	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+	ifr.ifr_metric = atoi(val);
+	if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
+		warn("SIOCSIFMETRIC");
+}
+
+#define	IFFBITS \
+"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS\7RUNNING\10NOARP\
+\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2\20MULTICAST"
+
+/*
+ * Print the status of the interface.  If an address family was
+ * specified, show it and it only; otherwise, show them all.
+ */
+void
+status()
+{
+	register struct afswtch *p = afp;
+
+	printf("%s: ", name);
+	printb("flags", flags, IFFBITS);
+	if (metric)
+		printf(" metric %d", metric);
+	putchar('\n');
+	if ((p = afp) != NULL) {
+		(*p->af_status)(1);
+	} else for (p = afs; p->af_name; p++) {
+		ifr.ifr_addr.sa_family = p->af_af;
+		(*p->af_status)(0);
+	}
+}
+
+void
+in_status(force)
+	int force;
+{
+	struct sockaddr_in *sin;
+	char *inet_ntoa();
+
+	getsock(AF_INET);
+	if (s < 0) {
+		if (errno == EPROTONOSUPPORT)
+			return;
+		err(1, "socket");
+	}
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
+	if (ioctl(s, SIOCGIFADDR, (caddr_t)&ifr) < 0) {
+		if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
+			if (!force)
+				return;
+			memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
+		} else
+			warn("SIOCGIFADDR");
+	}
+	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+	sin = (struct sockaddr_in *)&ifr.ifr_addr;
+	printf("\tinet %s ", inet_ntoa(sin->sin_addr));
+	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+	if (ioctl(s, SIOCGIFNETMASK, (caddr_t)&ifr) < 0) {
+		if (errno != EADDRNOTAVAIL)
+			warn("SIOCGIFNETMASK");
+		memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
+	} else
+		netmask.sin_addr =
+		    ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
+	if (flags & IFF_POINTOPOINT) {
+		if (ioctl(s, SIOCGIFDSTADDR, (caddr_t)&ifr) < 0) {
+			if (errno == EADDRNOTAVAIL)
+			    memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
+			else
+			    warn("SIOCGIFDSTADDR");
+		}
+		strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+		sin = (struct sockaddr_in *)&ifr.ifr_dstaddr;
+		printf("--> %s ", inet_ntoa(sin->sin_addr));
+	}
+	printf("netmask 0x%x ", ntohl(netmask.sin_addr.s_addr));
+	if (flags & IFF_BROADCAST) {
+		if (ioctl(s, SIOCGIFBRDADDR, (caddr_t)&ifr) < 0) {
+			if (errno == EADDRNOTAVAIL)
+			    memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
+			else
+			    warn("SIOCGIFBRDADDR");
+		}
+		strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+		sin = (struct sockaddr_in *)&ifr.ifr_addr;
+		if (sin->sin_addr.s_addr != 0)
+			printf("broadcast %s", inet_ntoa(sin->sin_addr));
+	}
+	putchar('\n');
+}
+
+#ifndef INET_ONLY
+
+void
+xns_status(force)
+	int force;
+{
+	struct sockaddr_ns *sns;
+
+	getsock(AF_NS);
+	if (s < 0) {
+		if (errno == EPROTONOSUPPORT)
+			return;
+		err(1, "socket");
+	}
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
+	if (ioctl(s, SIOCGIFADDR, (caddr_t)&ifr) < 0) {
+		if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
+			if (!force)
+				return;
+			memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
+		} else
+			warn("SIOCGIFADDR");
+	}
+	strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+	sns = (struct sockaddr_ns *)&ifr.ifr_addr;
+	printf("\tns %s ", ns_ntoa(sns->sns_addr));
+	if (flags & IFF_POINTOPOINT) { /* by W. Nesheim@Cornell */
+		if (ioctl(s, SIOCGIFDSTADDR, (caddr_t)&ifr) < 0) {
+			if (errno == EADDRNOTAVAIL)
+			    memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
+			else
+			    warn("SIOCGIFDSTADDR");
+		}
+		strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+		sns = (struct sockaddr_ns *)&ifr.ifr_dstaddr;
+		printf("--> %s ", ns_ntoa(sns->sns_addr));
+	}
+	putchar('\n');
+}
+
+void
+iso_status(force)
+	int force;
+{
+	struct sockaddr_iso *siso;
+	struct iso_ifreq ifr;
+
+	getsock(AF_ISO);
+	if (s < 0) {
+		if (errno == EPROTONOSUPPORT)
+			return;
+		err(1, "socket");
+	}
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
+	if (ioctl(s, SIOCGIFADDR_ISO, (caddr_t)&ifr) < 0) {
+		if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
+			if (!force)
+				return;
+			memset(&ifr.ifr_Addr, 0, sizeof(ifr.ifr_Addr));
+		} else
+			warn("SIOCGIFADDR_ISO");
+	}
+	strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+	siso = &ifr.ifr_Addr;
+	printf("\tiso %s ", iso_ntoa(&siso->siso_addr));
+	if (ioctl(s, SIOCGIFNETMASK_ISO, (caddr_t)&ifr) < 0) {
+		if (errno == EADDRNOTAVAIL)
+			memset(&ifr.ifr_Addr, 0, sizeof(ifr.ifr_Addr));
+		else
+			warn("SIOCGIFNETMASK_ISO");
+	} else {
+		printf(" netmask %s ", iso_ntoa(&siso->siso_addr));
+	}
+	if (flags & IFF_POINTOPOINT) {
+		if (ioctl(s, SIOCGIFDSTADDR_ISO, (caddr_t)&ifr) < 0) {
+			if (errno == EADDRNOTAVAIL)
+			    memset(&ifr.ifr_Addr, 0, sizeof(ifr.ifr_Addr));
+			else
+			    warn("SIOCGIFDSTADDR_ISO");
+		}
+		strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
+		siso = &ifr.ifr_Addr;
+		printf("--> %s ", iso_ntoa(&siso->siso_addr));
+	}
+	putchar('\n');
+}
+
+#endif	/* INET_ONLY */
+
+struct	in_addr inet_makeaddr();
+
+#define SIN(x) ((struct sockaddr_in *) &(x))
+struct sockaddr_in *sintab[] = {
+SIN(ridreq.ifr_addr), SIN(addreq.ifra_addr),
+SIN(addreq.ifra_mask), SIN(addreq.ifra_broadaddr)};
+
+void
+in_getaddr(s, which)
+	char *s;
+	int which;
+{
+	register struct sockaddr_in *sin = sintab[which];
+	struct hostent *hp;
+	struct netent *np;
+
+	sin->sin_len = sizeof(*sin);
+	if (which != MASK)
+		sin->sin_family = AF_INET;
+
+	if (inet_aton(s, &sin->sin_addr) == 0) {
+		if (hp = gethostbyname(s))
+			memcpy(&sin->sin_addr, hp->h_addr, hp->h_length);
+		else if (np = getnetbyname(s))
+			sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
+		else
+			errx(1, "%s: bad value", s);
+	}
+}
+
+/*
+ * Print a value a la the %b format of the kernel's printf
+ */
+void
+printb(s, v, bits)
+	char *s;
+	register char *bits;
+	register unsigned short v;
+{
+	register int i, any = 0;
+	register char c;
+
+	if (bits && *bits == 8)
+		printf("%s=%o", s, v);
+	else
+		printf("%s=%x", s, v);
+	bits++;
+	if (bits) {
+		putchar('<');
+		while (i = *bits++) {
+			if (v & (1 << (i-1))) {
+				if (any)
+					putchar(',');
+				any = 1;
+				for (; (c = *bits) > 32; bits++)
+					putchar(c);
+			} else
+				for (; *bits > 32; bits++)
+					;
+		}
+		putchar('>');
+	}
+}
+
+#ifndef INET_ONLY
+
+#define SNS(x) ((struct sockaddr_ns *) &(x))
+struct sockaddr_ns *snstab[] = {
+SNS(ridreq.ifr_addr), SNS(addreq.ifra_addr),
+SNS(addreq.ifra_mask), SNS(addreq.ifra_broadaddr)};
+
+void
+xns_getaddr(addr, which)
+	char *addr;
+	int which;
+{
+	struct sockaddr_ns *sns = snstab[which];
+	struct ns_addr ns_addr();
+
+	sns->sns_family = AF_NS;
+	sns->sns_len = sizeof(*sns);
+	sns->sns_addr = ns_addr(addr);
+	if (which == MASK)
+		printf("Attempt to set XNS netmask will be ineffectual\n");
+}
+
+#define SISO(x) ((struct sockaddr_iso *) &(x))
+struct sockaddr_iso *sisotab[] = {
+SISO(iso_ridreq.ifr_Addr), SISO(iso_addreq.ifra_addr),
+SISO(iso_addreq.ifra_mask), SISO(iso_addreq.ifra_dstaddr)};
+
+void
+iso_getaddr(addr, which)
+	char *addr;
+	int which;
+{
+	register struct sockaddr_iso *siso = sisotab[which];
+	struct iso_addr *iso_addr();
+	siso->siso_addr = *iso_addr(addr);
+
+	if (which == MASK) {
+		siso->siso_len = TSEL(siso) - (caddr_t)(siso);
+		siso->siso_nlen = 0;
+	} else {
+		siso->siso_len = sizeof(*siso);
+		siso->siso_family = AF_ISO;
+	}
+}
+
+void
+setsnpaoffset(val)
+	char *val;
+{
+	iso_addreq.ifra_snpaoffset = atoi(val);
+}
+
+void
+setnsellength(val)
+	char *val;
+{
+	nsellength = atoi(val);
+	if (nsellength < 0)
+		errx(1, "Negative NSEL length is absurd");
+	if (afp == 0 || afp->af_af != AF_ISO)
+		errx(1, "Setting NSEL length valid only for iso");
+}
+
+void
+fixnsel(s)
+	register struct sockaddr_iso *s;
+{
+	if (s->siso_family == 0)
+		return;
+	s->siso_tlen = nsellength;
+}
+
+void
+adjust_nsellength()
+{
+	fixnsel(sisotab[RIDADDR]);
+	fixnsel(sisotab[ADDR]);
+	fixnsel(sisotab[DSTADDR]);
+}
+
+#endif	/* INET_ONLY */
+
+void
+usage()
+{
+	fprintf(stderr, "usage: ifconfig interface\n%s%s%s%s%s%s",
+		"\t[ af [ address [ dest_addr ] ] [ up ] [ down ] ",
+		"[ netmask mask ] ]\n",
+		"\t[ metric n ]\n",
+		"\t[ arp | -arp ]\n",
+		"\t[ link0 | -link0 ] [ link1 | -link1 ] [ link2 | -link2 ]\n",
+		"       ifconfig -a [ af ]\n");
+	exit(1);
+}