Sandbox: Fix make system

Sandbox compilation failed with:

gcc -Wp,-MD,arch/sandbox/lib/.tap.o.d  -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/4.3.1/include -I/usr/include -Iinclude -P -Wall    -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(tap)"  -D"KBUILD_MODNAME=KBUILD_STR(tap)" -c -o arch/sandbox/lib/tap.o arch/sandbox/lib/tap.c
In file included from /usr/include/bits/socket.h:32,
                 from /usr/include/sys/socket.h:36,
                 from arch/sandbox/lib/tap.c:29:
/usr/include/limits.h:125:26: error: limits.h: No such file or directory

/usr/include/limits.h uses the next_include directive
This was because of the -nostdinc

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 68 insertions, 0 deletions

diff --git a/arch/sandbox/os/tap.c b/arch/sandbox/os/tap.c
new file mode 100644
index 0000000000..ebd828b2b2
--- /dev/null
+++ b/arch/sandbox/os/tap.c
@@ -0,0 +1,68 @@
+/*
+ * tap.c - host side functions for tap driver
+ *
+ * Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#include <string.h>
+
+int tap_alloc(char *dev)
+{
+	struct ifreq ifr;
+	int fd, err;
+
+	if ((fd = open("/dev/net/tun", O_RDWR)) < 0) {
+		perror("could not open /dev/net/tun");
+		return -1;
+	}
+
+	memset(&ifr, 0, sizeof(ifr));
+
+	/* Flags: IFF_TUN   - TUN device (no Ethernet headers)
+	 *        IFF_TAP   - TAP device
+	 *
+	 *        IFF_NO_PI - Do not provide packet information
+	 */
+	ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+	if (*dev)
+		strncpy(ifr.ifr_name, dev, IFNAMSIZ);
+
+	if ((err = ioctl(fd, TUNSETIFF, (void *)&ifr)) < 0) {
+		perror("could not get tap device");
+		close(fd);
+		return err;
+	}
+
+	strcpy(dev, ifr.ifr_name);
+	return fd;
+}
+
+/**
+ * @file
+ * @brief Host side functions for tap driver
+ */