sft: merge pfSense stf additions not in FreeBSD

Includes later fixes in OPNsense 18.7 while reworking it for 19.1.

Taken from: https://github.com/pfsense/FreeBSD-src/tree/RELENG_2_4

sbin/ifconfig/Makefile

@@ -35,6 +35,7 @@ SRCS+=	ifvxlan.c		# VXLAN support
 SRCS+=	ifgre.c			# GRE keys etc
 SRCS+=	ifgif.c			# GIF reversed header workaround
 SRCS+=	ifipsec.c		# IPsec VTI
+SRCS+=	ifstf.c			# STF configuration options
 
 SRCS+=	sfp.c			# SFP/SFP+ information
 LIBADD+=	m

sbin/ifconfig/ifstf.c

@@ -0,0 +1,155 @@
+/*-
+ * Copyright 2013 Ermal Luci
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
+ * 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.
+ */
+
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/sockio.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <net/route.h>
+
+#include <netinet/in.h>
+#include <sys/mbuf.h>
+#include <net/if_stf.h>
+#include <arpa/inet.h>
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <err.h>
+#include <errno.h>
+
+#include "ifconfig.h"
+
+static int
+do_cmd(int sock, u_long op, void *arg, size_t argsize, int set)
+{
+	struct ifdrv ifd;
+
+	memset(&ifd, 0, sizeof(ifd));
+
+	strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
+	ifd.ifd_cmd = op;
+	ifd.ifd_len = argsize;
+	ifd.ifd_data = arg;
+
+	return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd));
+}
+
+static void
+stf_status(int s)
+{
+	struct stfv4args param;
+
+	if (do_cmd(s, STF_GV4NET, &param, sizeof(param), 0) < 0)
+		return;
+
+	/* inet_ntoa() uses a shared buffer */
+	printf("\tv4net %s/%d ", inet_ntoa(param.inaddr), param.prefix);
+	printf("-> tv4br %s\n", inet_ntoa(param.dstv4_addr));
+}
+
+static void
+setstf_br(const char *val, int d, int s, const struct afswtch *afp)
+{
+	struct stfv4args req;
+	struct sockaddr_in sin;
+
+	memset(&req, 0, sizeof(req));
+
+	sin.sin_len = sizeof(sin);
+	sin.sin_family = AF_INET;
+
+	if (!inet_aton(val, &sin.sin_addr))
+		errx(1, "%s: bad value", val);
+
+	req.dstv4_addr = sin.sin_addr;
+	if (do_cmd(s, STF_SDSTV4, &req, sizeof(req), 1) < 0)
+		err(1, "STF_SV4DST %s",  val);
+}
+
+static void
+setstf_set(const char *val, int d, int s, const struct afswtch *afp)
+{
+	struct stfv4args req;
+	struct sockaddr_in sin;
+	const char *errstr;
+	char *p = NULL;
+
+	memset(&req, 0, sizeof(req));
+
+	sin.sin_len = sizeof(sin);
+	sin.sin_family = AF_INET;
+
+	p = strrchr(val, '/');
+	if (p == NULL)
+		errx(2, "Wrong argument given");
+
+	*p = '\0';
+	if (!isdigit(*(p + 1)))
+		errstr = "invalid";
+	else
+		req.prefix = (int)strtonum(p + 1, 0, 32, &errstr);
+	if (errstr != NULL) {
+		*p = '/';
+		errx(1, "%s: bad value (width %s)", val, errstr);
+	}
+
+	if (!inet_aton(val, &sin.sin_addr))
+		errx(1, "%s: bad value", val);
+
+	req.inaddr = sin.sin_addr;
+	if (do_cmd(s, STF_SV4NET, &req, sizeof(req), 1) < 0)
+		err(1, "STF_SV4NET %s",  val);
+}
+
+static struct cmd stf_cmds[] = {
+	DEF_CMD_ARG("stfv4net",		setstf_set),
+	DEF_CMD_ARG("stfv4br",		setstf_br),
+};
+
+static struct afswtch af_stf = {
+	.af_name	= "af_stf",
+	.af_af		= AF_UNSPEC,
+	.af_other_status = stf_status,
+};
+
+static __constructor void
+stf_ctor(void)
+{
+	int i;
+
+	for (i = 0; i < nitems(stf_cmds);  i++)
+		cmd_register(&stf_cmds[i]);
+	af_register(&af_stf);
+}