Overhaul to cleanup some of the tangled logic that's grown over the years.

o break per-address family support out into separate files
o modularize per-address family and functional operations using
  a registration mechanism; this permits configuration according
  to which files you include (but beware that order of the files
  is important to insure backwards compatibility)
o many cleanups to eliminate incestuous behaviour, global variables,
  and poor coding practices (still much more to fix)

The original motivation of this work was to support dynamic addition
of functionality based on the interface so we can eliminate the various
little control programs and so that vendors can distribute ifconfig
plugins that support their in-kernel code.  That work is still to be
completed.

o Update 802.11 support for all the new net80211 functionality; some
  of these operations (e.g. list *) may be better suited in a different
  program

1 files changed, 198 insertions, 0 deletions

diff --git a/sbin/ifconfig/af_inet.c b/sbin/ifconfig/af_inet.c
new file mode 100644
index 0000000..4a8e3a1
--- /dev/null
+++ b/sbin/ifconfig/af_inet.c
@@ -0,0 +1,198 @@
+/*
+ * 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.
+ * 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 const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/route.h>		/* for RTX_IFA */
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <netinet/in.h>
+#include <net/if_var.h>		/* for struct ifaddr */
+#include <netinet/in_var.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include "ifconfig.h"
+
+static struct ifaliasreq in_addreq;
+static struct ifreq in_ridreq;
+
+static void
+in_status(int s __unused, const struct rt_addrinfo * info)
+{
+	struct sockaddr_in *sin, null_sin;
+	
+	memset(&null_sin, 0, sizeof(null_sin));
+
+	sin = (struct sockaddr_in *)info->rti_info[RTAX_IFA];
+	if (sin == NULL)
+		return;
+
+	printf("\tinet %s ", inet_ntoa(sin->sin_addr));
+
+	if (flags & IFF_POINTOPOINT) {
+		/* note RTAX_BRD overlap with IFF_BROADCAST */
+		sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD];
+		if (!sin)
+			sin = &null_sin;
+		printf("--> %s ", inet_ntoa(sin->sin_addr));
+	}
+
+	sin = (struct sockaddr_in *)info->rti_info[RTAX_NETMASK];
+	if (!sin)
+		sin = &null_sin;
+	printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
+
+	if (flags & IFF_BROADCAST) {
+		/* note RTAX_BRD overlap with IFF_POINTOPOINT */
+		sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD];
+		if (sin && sin->sin_addr.s_addr != 0)
+			printf("broadcast %s", inet_ntoa(sin->sin_addr));
+	}
+	putchar('\n');
+}
+
+#define SIN(x) ((struct sockaddr_in *) &(x))
+static struct sockaddr_in *sintab[] = {
+	SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr),
+	SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr)
+};
+
+static void
+in_getaddr(const char *s, int which)
+{
+#define	MIN(a,b)	((a)<(b)?(a):(b))
+	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 (which == ADDR) {
+		char *p = NULL;
+
+		if((p = strrchr(s, '/')) != NULL) {
+			/* address is `name/masklen' */
+			int masklen;
+			int ret;
+			struct sockaddr_in *min = sintab[MASK];
+			*p = '\0';
+			ret = sscanf(p+1, "%u", &masklen);
+			if(ret != 1 || (masklen < 0 || masklen > 32)) {
+				*p = '/';
+				errx(1, "%s: bad value", s);
+			}
+			min->sin_len = sizeof(*min);
+			min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 
+				              0xffffffff);
+		}
+	}
+
+	if (inet_aton(s, &sin->sin_addr))
+		return;
+	if ((hp = gethostbyname(s)) != 0)
+		bcopy(hp->h_addr, (char *)&sin->sin_addr, 
+		    MIN(hp->h_length, sizeof(sin->sin_addr)));
+	else if ((np = getnetbyname(s)) != 0)
+		sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
+	else
+		errx(1, "%s: bad value", s);
+#undef MIN
+}
+
+static void
+in_status_tunnel(int s)
+{
+	char src[NI_MAXHOST];
+	char dst[NI_MAXHOST];
+	struct ifreq ifr;
+	const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr;
+
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, name, IFNAMSIZ);
+
+	if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0)
+		return;
+	if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0)
+		src[0] = '\0';
+
+	if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0)
+		return;
+	if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0)
+		dst[0] = '\0';
+
+	printf("\ttunnel inet %s --> %s\n", src, dst);
+}
+
+static void
+in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
+{
+	struct ifaliasreq addreq;
+
+	memset(&addreq, 0, sizeof(addreq));
+	strncpy(addreq.ifra_name, name, IFNAMSIZ);
+	memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
+	memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len);
+
+	if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0)
+		warn("SIOCSIFPHYADDR");
+}
+
+static struct afswtch af_inet = {
+	.af_name	= "inet",
+	.af_af		= AF_INET,
+	.af_status	= in_status,
+	.af_getaddr	= in_getaddr,
+	.af_status_tunnel = in_status_tunnel,
+	.af_settunnel	= in_set_tunnel,
+	.af_difaddr	= SIOCDIFADDR,
+	.af_aifaddr	= SIOCAIFADDR,
+	.af_ridreq	= &in_ridreq,
+	.af_addreq	= &in_addreq,
+};
+
+static __constructor void
+inet_ctor(void)
+{
+	af_register(&af_inet);
+}