net: tools: Helper scripts for running socat, tunslip6 and radvd

Adding convenience scripts that help user when running socat,
radvd and tunslip6 processes. These helper scripts restart
corresponding processes when qemu stops. This way end user
does not need to manual restart the utility processes.

Change-Id: I2e8eb15ee0ffe2ac8f1cedf4431cf8b09fcbbee5
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>

net/ip/tools/README

@@ -22,6 +22,10 @@ $ socat PTY,link=/tmp/slip.dev UNIX-LISTEN:/tmp/slip.sock
 $ make PLATFORM_CONFIG=basic_cortex_m3 ARCH=arm \
      QEMU_EXTRA_FLAGS="-serial none -serial unix:/tmp/slip.sock" qemu
 
+  or just simply
+
+$ make qemu
+
 3) Start tunslip6
 
 $ sudo ./tunslip6 -s `readlink /tmp/slip.dev` 2001:db8::1/64
@@ -32,6 +36,23 @@ $ nc -u -6 2001:db8::2 4242 <<EOF
 foobar
 EOF
 
+There are also convenience scripts for running socat, radvd and
+tunslip6 processes called loop-socat.sh, loop-radvd.sh and
+loop-slip.sh. So to simplify things you need three terminals
+for doing this:
+
+Terminal 1:
+$ ./loop-socat.sh
+
+Terminal 2:
+$ sudo ./loop-slip.sh
+
+Terminal 3:
+$ sudo ./loop-radvd.sh
+
+After running these scripts you do not need to manual restart
+them when qemu process stops.
+
 
 radvd
 =====

net/ip/tools/loop-radvd.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+# Run radvd in a loop. This way we can restart qemu and do not need
+# to manually restart radvd process.
+
+if [ ! -f ./radvd.conf ]; then
+    if [ ! -f $ZEPHYR_BASE/net/ip/tools/radvd.conf ]; then
+	echo "Cannot find radvd.conf file."
+	exit 1
+    fi
+    DIR=$ZEPHYR_BASE/net/ip/tools
+else
+    DIR=.
+fi
+
+if [ `id -u` != 0 ]; then
+    echo "Run this script as a root user!"
+    exit 2
+fi
+
+while [ 1 ]; do radvd  -d 1 -C $DIR/radvd.conf -m stderr; done

net/ip/tools/loop-slip.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+# Run tunslip in a loop. This way we can restart qemu and do not need
+# to manually restart tunslip process that creates the tun0 device.
+
+if [ ! -f ./tunslip6 ]; then
+    if [ ! -f $ZEPHYR_BASE/net/ip/tools/tunslip6 ]; then
+	echo "Cannot find tunslip6 executable."
+	exit 1
+    fi
+    DIR=$ZEPHYR_BASE/net/ip/tools
+else
+    DIR=.
+fi
+
+if [ `id -u` != 0 ]; then
+    echo "Run this script as a root user!"
+    exit 2
+fi
+
+while [ 1 ]; do $DIR/tunslip6 -s `readlink /tmp/slip.dev` 2001:db8::1/64; done

net/ip/tools/loop-socat.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+# Run socat in a loop. This way we can restart qemu and do not need
+# to manually restart socat.
+
+while [ 1 ]; do socat PTY,link=/tmp/slip.dev UNIX-LISTEN:/tmp/slip.sock; done