Add Docker files to build RTPEngine used by PCSCF

rtpengine/rtpengine_init.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+
+# BSD 2-Clause License
+
+# Copyright (c) 2020, Supreeth Herle
+# 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 THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+
+set -x
+RUNTIME=${1:-rtpengine}
+
+if lsmod | grep xt_RTPENGINE || modprobe xt_RTPENGINE; then
+	echo "rtpengine kernel module already loaded."
+else
+	modprobe xt_RTPENGINE
+fi
+
+# Populate options of the rtpengine cli command
+[ -z "$INTERFACE" ] && INTERFACE="$(awk 'END{print $1}' /etc/hosts)"
+[ -z "$TABLE" ] && TABLE="0"
+[ -z "$LISTEN_NG" ] && LISTEN_NG="$(awk 'END{print $1}' /etc/hosts):2223"
+[ -z "$PORT_MIN" ] && PORT_MIN="30000"
+[ -z "$PORT_MAX" ] && PORT_MAX="40000"
+[ -z "$TOS" ] && TOS="184"
+[ -z "$PIDFILE" ] && PIDFILE="/run/ngcp-rtpengine-daemon.pid"
+
+OPTIONS=""
+OPTIONS="$OPTIONS --interface=$INTERFACE --listen-ng=$LISTEN_NG --pidfile=$PIDFILE --port-min=$PORT_MIN --port-max=$PORT_MAX "
+OPTIONS="$OPTIONS --table=$TABLE  --tos=$TOS --foreground"
+
+if test "$NO_FALLBACK" = "yes" ; then
+	OPTIONS="$OPTIONS --no-fallback"
+fi
+
+set +e
+if [ -e /proc/rtpengine/control ]; then
+	echo "del $TABLE" > /proc/rtpengine/control 2>/dev/null
+fi
+# Freshly add the iptables rules to forward the udp packets to the iptables-extension "RTPEngine":
+# Remember iptables table = chains, rules stored in the chains
+# -N (create a new chain with the name rtpengine)
+iptables -N rtpengine 2> /dev/null
+
+# -D: Delete the rule for the target "rtpengine" if exists. -j (target): chain name or extension name 
+# from the table "filter" (the default -without the option '-t') 
+iptables -D INPUT -j rtpengine 2> /dev/null
+# Add the rule again so the packets will go to rtpengine chain after the (filter-INPUT) hook point.
+iptables -I INPUT -j rtpengine
+# Delete and Insert a rule in the rtpengine chain to forward the UDP traffic    
+iptables -D rtpengine -p udp -j RTPENGINE --id "$TABLE" 2>/dev/null
+iptables -I rtpengine -p udp -j RTPENGINE --id "$TABLE"
+iptables-save > /etc/iptables.rules
+
+# The same for IPv6
+ip6tables -N rtpengine 2> /dev/null
+ip6tables -D INPUT -j rtpengine 2> /dev/null
+ip6tables -I INPUT -j rtpengine
+ip6tables -D rtpengine -p udp -j RTPENGINE --id "$TABLE" 2>/dev/null
+ip6tables -I rtpengine -p udp -j RTPENGINE --id "$TABLE"
+ip6tables-save > /etc/ip6tables.rules
+
+set -x
+
+exec $RUNTIME $OPTIONS