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@@ -0,0 +1,563 @@
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+#!/bin/sh
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+#
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+# $Id$
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+#
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+# SER configuration script
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+#
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+# disclaimer: extremely simplistic and experimental
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+# useful only for people who know what they are doing
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+# and want to save some typing
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+#
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+# call it to generate a basic script -- you have to
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+# carry out any subsequent changes manually
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+#
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+
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+# ------------------- Variables ------------------------
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+
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+# prompted variables
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+# SER_DOMAIN -- name of served domain, e.g., foo.bar.com
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+# SER_GWIP -- IP address of PSTN gateway, e.g. 10.0.0.1
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+
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+# parameters that are typically not changed
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+SER_SQL_URI="sql://ser:heslo@localhost/ser"
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+# set LIB_PATH if all modules are installed in a single
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+# directory; otherwise, modules are sought in 'modules'
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+# subdirectories
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+#SER_LIB_PATH="/usr/local/lib/ser/modules"
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+
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+
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+# --------------------- functions ---------------------------
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+function go_to_pstn()
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+{
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+ if [ -n "$SER_GWIP" ] ; then
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+ cat << EOGOTOPSTN
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+ # now check if it's about PSTN destinations through our gateway;
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+ # note that 8.... is exempted for numerical non-gw destinations
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+ if (uri=~"sip:\+?[0-79][0-9]*@.*") {
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+ route(3);
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+ break;
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+ };
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+EOGOTOPSTN
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+ fi
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+}
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+
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+
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+function addr2re()
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+{
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+ echo $1 | sed -ne "s/\./\\\./gp"
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+}
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+
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+function gw_check()
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+{
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+ if [ -n "$SER_GWIP" ] ; then
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+ cat << EOGWTEST
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+ if (uri=~"sip:[+0-9]+@$SER_GWIP_RE") {
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+ # it is gateway -- proceed to ACLs
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+ route(3);
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+ break;
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+ };
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+EOGWTEST
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+ fi
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+}
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+
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+function mine_check()
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+{
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+ printf "uri=~\"[@:](sip[\.)?$SER_DOMAIN_TEST_RE([;:].*)*\" $SER_GW_TEST_RE"
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+}
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+
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+function gw_m_check()
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+{
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+ if [ -n "$SER_GWIP" ] ; then
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+ cat << EOMCHECK
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+ if (search("^(Contact|m): .*$SER_GWIP_RE")) {
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+ log(1, "LOG: alert: protected contacts\n");
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+ sl_send_reply("476", "No Server Address in Contacts Allowed" );
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+ break;
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+ };
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+EOMCHECK
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+ fi
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+}
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+
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+function help()
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+{
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+ cat << EOHELP
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+Numbering plan is as follows:
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+- numbers beginning with 8 are considered aliases
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+- numbers beginning with + are considered ENUM destinations
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+EOHELP
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+ if [ -n "$SER_GWIP" ] ; then
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+ cat << EOHELP2
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+- all other numbers are considered PSTN destinations
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+ ... to dial PSTN, a user must have 'int' privilege
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+EOHELP2
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+ else
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+ echo "- all other numbers are considered usernames"
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+ fi
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+}
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+
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+function usage()
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+{
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+ echo "Usage: $0 <domain_name> [<ip_address_of_gateway>]" \
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+ '> <config_file>' > /dev/stderr
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+ exit 1
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+}
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+
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+function load_mod()
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+{
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+ if [ -n "$SER_LIB_PATH" ] ; then
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+ echo "loadmodule \"$SER_LIB_PATH/$1.so\""
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+ else
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+ echo "loadmodule \"modules/$1/$1.so\""
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+ fi
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+}
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+
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+# ----------------------- user-parameter check ---------------
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+# SER_DOMAIN -- name of served domain, e.g., foo.bar.com
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+# SER_GWIP -- IP address of PSTN gateway, e.g. 10.0.0.1
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+
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+if [ $# -gt 0 ] ; then
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+ SER_DOMAIN="$1"
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+ shift
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+ if [ $# -gt 0 ] ; then
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+ SER_GWIP="$1"
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+ shift
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+ fi
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+ if [ $# -gt 0 ] ; then
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+ usage
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+ fi
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+else
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+ usage
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+fi
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+
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+# ---------------------- initialization -------------------------
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+
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+# autodetection parameters
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+SER_IP=`/sbin/ifconfig eth0 |
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+ sed -ne 's/\( \)*\(inet addr:\)\([0-9\.]*\).*/\3/gp'`
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+
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+# construction of regular expressions
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+SER_IP_RE=`addr2re $SER_IP`
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+SER_DOMAIN_RE=`addr2re $SER_DOMAIN`
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+
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+# tests
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+# - is this for my domain
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+SER_DOMAIN_TEST_RE=`printf "($SER_DOMAIN_RE|$SER_IP_RE)"`
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+# - is this for my gateway ?
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+if [ -n "$SER_GWIP" ] ; then
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+ SER_GWIP_RE=`addr2re $SER_GWIP`
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+ SER_GW_TEST_RE=`printf "| uri=~\"@$SER_GWIP_RE([;:].*)*\""`
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+fi
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+
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+SER_REGISTRAR="registrar@$SER_DOMAIN"
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+
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+# ---------------------- verficiation --------------------------
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+set | grep ^SER_ > /dev/stderr
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+echo > /dev/stderr
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+echo "IS EVERYTHING OK ???? (press ^C to interrupt)" > /dev/stderr
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+read
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+
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+
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+# --------------------- dump it here -------------------------
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+
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+cat << EOF
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+
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+#
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+# \$Id$
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+#
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+# autogenerated SER configuration
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+#
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+# user: `id`
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+# system: `uname -a`
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+# date: `date`
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+#
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+
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+# ----------- global configuration parameters ------------------------
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+
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+debug=3
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+fork=yes
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+port=5060
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+log_stderror=no
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+memlog=5
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+
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+mhomed=yes
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+
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+fifo="/tmp/ser_fifo"
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+
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+alias=$SER_DOMAIN
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+
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+# uncomment to override config values for test
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+/*
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+debug=3 # debug level (cmd line: -ddd)
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+fork=no
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+port=5068
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+log_stderror=yes # (cmd line: -E)
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+fifo="/tmp/ser_fifox"
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+ */
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+
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+
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+check_via=no # (cmd. line: -v)
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+dns=no # (cmd. line: -r)
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+rev_dns=no # (cmd. line: -R)
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+children=16
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+# if changing fifo mode to a more restrictive value, put
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+# decimal value in there, e.g. dec(rw|rw|rw)=dec(666)=438
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+#fifo_mode=438
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+
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+# ------------------ module loading ----------------------------------
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+
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+`load_mod tm`
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+`load_mod sl`
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+`load_mod acc`
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+`load_mod rr`
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+`load_mod maxfwd`
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+`load_mod mysql`
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+`load_mod usrloc`
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+`load_mod registrar`
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+`load_mod auth`
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+`load_mod auth_db`
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+`load_mod textops`
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+`load_mod uri`
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+`load_mod group`
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+`load_mod msilo`
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+`load_mod enum`
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+
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+
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+
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+# ----------------- setting module-specific parameters ---------------
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+
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+# all DB urls here
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+modparam("usrloc|acc|auth_db|group|msilo|uri", "db_url",
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+ "$SER_SQL_URI")
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+
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+# -- usrloc params --
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+/* 0 -- dont use mysql, 1 -- write_through, 2--write_back */
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+modparam("usrloc", "db_mode", 2)
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+modparam("usrloc", "timer_interval", 10)
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+
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+# -- auth params --
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+
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+modparam("auth_db", "calculate_ha1", yes)
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+#modparam("auth_db", "user_column", "user_id")
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+modparam("auth_db", "password_column", "password")
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+modparam("auth", "nonce_expire", 300)
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+
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+# -- rr params --
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+# add value to ;lr param to make some broken UAs happy
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+modparam("rr", "enable_full_lr", 1)
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+
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+# -- acc params --
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+# that is the flag for which we will account -- don't forget to
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+modparam("acc", "db_flag", 1 )
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+modparam("acc", "db_missed_flag", 3 )
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+
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+# -- tm params --
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+modparam("tm", "fr_timer", 20 )
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+modparam("tm", "fr_inv_timer", 90 )
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+modparam("tm", "wt_timer", 20 )
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+
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+# -- msilo params
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+modparam("msilo", "registrar", "sip:$SER_REGISTRAR")
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+
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+# -- enum params --
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+#
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+modparam("enum", "domain_suffix", "e164.arpa.")
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+
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+
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+# ------------------------- request routing logic -------------------
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+
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+# main routing logic
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+
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+route{
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+
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+ /* ********* ROUTINE CHECKS ********************************** */
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+
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+ # filter too old messages
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+ if (!mf_process_maxfwd_header("10")) {
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+ log("LOG: Too many hops\n");
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+ sl_send_reply("483","Alas Too Many Hops");
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+ break;
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+ };
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+ if (len_gt( max_len )) {
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+ sl_send_reply("513", "Message too large sorry");
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+ break;
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+ };
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+
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+
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+ # Make sure that requests dont advertise addresses
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+ # from private IP space (RFC1918) in Contact HF
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+ # (note: does not match with folded lines)
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+ if (search("^(Contact|m): .*@(192\.168\.|10\.|172\.16)")) {
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+ # allow RR-ed requests, as these may indicate that
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+ # a NAT-enabled proxy takes care of it; unless it is
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+ # a REGISTER
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+ if ((method=="REGISTER" || ! search("^Record-Route:"))
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+ && !( src_ip==192.168.0.0/16 ||
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+ src_ip==10.0.0.0/8 || src_ip==172.16.0.0/12 )) {
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+ log("LOG: Someone trying to register from private IP again\n");
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+ sl_send_reply("479", "We dont accept private IP contacts" );
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+ break;
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+ };
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+ };
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+
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+ # anti-spam -- if somene claims to belong to our domain in From,
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+ # challenge him (skip REGISTERs -- we will chalenge them later)
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+ if (search("(From|F):.*$SER_DOMAIN_TEST_RE")) {
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+ # invites forwarded to other domains, like FWD may cause subsequent
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+ # request to come from there but have iptel in From -> verify
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+ # only INVITEs (ignore FIFO/UAC's requests, i.e. src_ip==myself)
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+ if (method=="INVITE" & !(src_ip==$SER_IP)) {
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+ if (!(proxy_authorize( "$SER_DOMAIN" /* realm */,
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+ "subscriber" /* table name */ ))) {
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+ proxy_challenge("$SER_DOMAIN" /* realm */, "0" /* no-qop */);
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+ break;
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+ };
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+ # to maintain outside credibility of our proxy, we enforce
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+ # username in From to equal digest username; user with
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+ # "john.doe" id could advertise "bill.gates" in From otherwise;
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+ if (!check_from()) {
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+ log("LOG: From Cheating attempt in INVITE\n");
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+ sl_send_reply("403", "That is ugly -- use From=id next time (OB)");
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+ break;
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+ };
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+ # we better don't consume credentials -- some requests may be
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+ # spiraled through our server (sfo@iptel->7141@iptel) and the
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+ # subsequent iteration may challenge too, for example because of
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+ # iptel claim in From; UACs then give up because they
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+ # already submitted credentials for the given realm
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+ #consume_credentials();
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+ }; # INVITEs claiming to come from our domain
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+ } else if (method=="INVITE" && !(uri=~"[@:\.]$SER_DOMAIN_TEST_RE([;:].*)*"
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+ # ... and we serve our gateway too if present
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+ $SER_GW_TEST_RE )) {
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+ #the INVITE neither claims to come from our domain nor is it targeted to it
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+ # -> junk it
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+ sl_send_reply("403", "No relaying");
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+ break;
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+ };
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+
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+
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+ /* ********* RR ********************************** */
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+ # to be safe, record route everything; UAs may use different
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+ # transport protocols and need to have SER in path
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+ record_route();
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+ # if route forces us to forward to some explicit destination,
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+ # do so; check however first that a cheater didn't preload
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+ # a gateway destination to bypass PSTN ACLs
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+
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+ if (loose_route()) {
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+ `gw_check`
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+ # route HF determined next hop; forward there
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+ append_hf("P-hint: rr-enforced\r\n");
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+ t_relay();
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+ break;
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+ };
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+
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+
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+ /* ********* check for requests targeted out of our domain... ******* */
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+ # sign of our domain: there is '@' (username) or : (nothing) in
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+ # front of our domain name ; ('.' is not there -- we handle all
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+ # xxx.iptel.org as outbound hosts);if none of these cases matches,
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+ # proceed with processing of outbound requests in route[2]
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+ if (!(`mine_check`)) {
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+ route(2);
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+ break;
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+ };
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+
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+
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+ /* ************ requests for our domain ********** */
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+
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+
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+ /* now, the request is for sure for our domain */
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+
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+
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+ # registers always MUST be authenticated to
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+ # avoid stealing incoming calls
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+ if (method=="REGISTER") {
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+
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+ # Make sure that user's dont register infinite loops
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+ # (note: does not match with folded lines)
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+ if (search("^(Contact|m): .*@$SER_DOMAIN_TEST_RE")) {
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+ log(1, "LOG: alert: someone trying to set aor==contact\n");
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+ sl_send_reply("476", "No Server Address in Contacts Allowed" );
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+ break;
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+ };
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+ `gw_m_check`
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+
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+ if (!www_authorize( "$SER_DOMAIN" /* realm */,
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+ "subscriber" /* table name */ )) {
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+ # challenge if none or invalid credentials
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+ www_challenge( "$SER_DOMAIN" /* realm */,
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+ "0" /* no qop -- some phones can't deal with it */);
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+ break;
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+ };
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+
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+ # prohibit attempts to grab someone else's To address
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+ # using valid credentials;
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+
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+ if (!check_to()) {
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+ log("LOG: To Cheating attempt\n");
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+ sl_send_reply("403", "That is ugly -- use To=id in REGISTERs");
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+ break;
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+ };
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+ # it is an authenticated request, update Contact database now
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+ if (!save("location")) {
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+ sl_reply_error();
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+ };
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+ m_dump();
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+ break;
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+ };
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+
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+ # some UACs might be fooled by Contacts our UACs generate to make MSN
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+ # happy (web-im, e.g.) -- tell its urneachable
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+ if (uri=~"sip:daemon@" ) {
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+ sl_send_reply("410", "daemon is gone");
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+ break;
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+ };
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+
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+ # is this an ENUM destination (leading +?)? give it a try, if the lookup
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+ # doesn't change URI, just continue
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|
|
+ if (uri=~"sip:\+[0-9]+@") {
|
|
|
+ if (!enum_query("voice")) { # if parameter empty, it defaults to "e2u+sip"
|
|
|
+ enum_query(""); # E2U+sip
|
|
|
+ };
|
|
|
+ } else {
|
|
|
+ # aliases (take precedences over PSTN number; provisioning interface
|
|
|
+ # is set up to assinge aliases beginning with 8)
|
|
|
+ lookup("aliases");
|
|
|
+ };
|
|
|
+
|
|
|
+
|
|
|
+ # check again, if it is still for our domain after aliases are resolved
|
|
|
+ if (!(`mine_check`)) {
|
|
|
+ route(5);
|
|
|
+ break;
|
|
|
+ };
|
|
|
+
|
|
|
+ `go_to_pstn`
|
|
|
+
|
|
|
+ # native SIP destinations are handled using our USRLOC DB
|
|
|
+ if (!lookup("location")) {
|
|
|
+ # handle user which was not found ...
|
|
|
+ route(4);
|
|
|
+ break;
|
|
|
+ };
|
|
|
+ # check whether some inventive user has uploaded gateway
|
|
|
+ # contacts to UsrLoc to bypass our authorization logic
|
|
|
+ `gw_check`
|
|
|
+
|
|
|
+ /* ... and also report on missed calls ... */
|
|
|
+ setflag(3);
|
|
|
+
|
|
|
+ # we now know we may, we know where, let it go out now!
|
|
|
+ append_hf("P-hint: USRLOC\r\n");
|
|
|
+ if (!t_relay()) {
|
|
|
+ sl_reply_error();
|
|
|
+ break;
|
|
|
+ };
|
|
|
+}
|
|
|
+#------------------- OUTBOUND ----------------------------------------
|
|
|
+
|
|
|
+# routing logic for outbound requests targeted out of our domain
|
|
|
+# (keep in mind messages to our users can end up here too: for example,
|
|
|
+# an INVITE may be UsrLoc-ed, then the other party uses outbound
|
|
|
+# proxy with r-uri=the usr_loced addredd (typically IP))
|
|
|
+route[2] {
|
|
|
+ append_hf("P-hint: OUTBOUND\r\n");
|
|
|
+ t_relay();
|
|
|
+}
|
|
|
+
|
|
|
+#------- ALIASED OUTBOUND --------------------------------------------
|
|
|
+
|
|
|
+# routing logic for inbound requests aliased outbound; unlike
|
|
|
+# with real outbound requests we do not force authentication
|
|
|
+# as these calls are server by our server and we do not want
|
|
|
+# to disqualify unathenticated request originatiors from other
|
|
|
+# domains
|
|
|
+route[5] {
|
|
|
+ append_hf("P-hint: ALIASED-OUTBOUND\r\n");
|
|
|
+ t_relay();
|
|
|
+}
|
|
|
+
|
|
|
+#----------------- PSTN ----------------------------------------------
|
|
|
+
|
|
|
+# logic for calls to the PSTN
|
|
|
+route[3] {
|
|
|
+ # turn accounting on
|
|
|
+ setflag(1);
|
|
|
+
|
|
|
+ /* require all who call PSTN to be members of the "int" group;
|
|
|
+ apply ACLs only to INVITEs -- we don't need to protect other requests, as they
|
|
|
+ don't imply charges; also it could cause troubles when a call comes in via PSTN
|
|
|
+ and goes to a party that can't authenticate (voicemail, other domain) -- BYEs would
|
|
|
+ fail then; exempt Cisco gateway from authentication by IP address -- it does not
|
|
|
+ support digest
|
|
|
+ */
|
|
|
+ if (method=="INVITE" && (!src_ip==$SER_GWIP)) {
|
|
|
+ if (!proxy_authorize( "$SER_DOMAIN" /* realm */,
|
|
|
+ "subscriber" /* table name */)) {
|
|
|
+ proxy_challenge( "$SER_DOMAIN" /* realm */, "0" /* no qop */ );
|
|
|
+ break;
|
|
|
+ };
|
|
|
+ # let's check from=id ... avoids accounting confusion
|
|
|
+ if (method=="INVITE" & !check_from()) {
|
|
|
+ log("LOG: From Cheating attempt\n");
|
|
|
+ sl_send_reply("403", "That is ugly -- use From=id next time (gw)");
|
|
|
+ break;
|
|
|
+ };
|
|
|
+
|
|
|
+ if(!is_user_in("credentials", "int")) {
|
|
|
+ sl_send_reply("403", "NO PSTN Privileges...");
|
|
|
+ break;
|
|
|
+ };
|
|
|
+ consume_credentials();
|
|
|
+
|
|
|
+ }; # INVITE to authorized PSTN
|
|
|
+
|
|
|
+ # if you have passed through all the checks, let your call go to GW!
|
|
|
+ rewritehostport("$SER_GWIP:5060");
|
|
|
+
|
|
|
+ # snom conditioner
|
|
|
+ if (method=="INVITE" && search("User-Agent: snom")) {
|
|
|
+ replace("100rel, ", "");
|
|
|
+ };
|
|
|
+
|
|
|
+ append_hf("P-hint: GATEWAY\r\n");
|
|
|
+ # use UDP to guarantee well-known sender port (TCP ephemeral)
|
|
|
+ t_relay_to_udp("$SER_GWIP","5060");
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+/* *********** handling of unavailable user ******************* */
|
|
|
+
|
|
|
+route[4] {
|
|
|
+/**/
|
|
|
+ # message store
|
|
|
+ if (method=="MESSAGE") {
|
|
|
+ t_newtran();
|
|
|
+ if (m_store("0")) {
|
|
|
+ t_reply("202", "Accepted for Later Delivery");
|
|
|
+ } else {
|
|
|
+ t_reply("503", "Service Unavailable");
|
|
|
+ };
|
|
|
+ break;
|
|
|
+ };
|
|
|
+/**/
|
|
|
+ # non-Voip -- just send "off-line"
|
|
|
+ if (!(method=="INVITE" || method=="ACK" || method=="CANCEL")) {
|
|
|
+ sl_send_reply("404", "Not Found");
|
|
|
+ break;
|
|
|
+ };
|
|
|
+ # voicemail subscribers ...
|
|
|
+ t_newtran();
|
|
|
+ t_reply("404", "Not Found");
|
|
|
+ # we account missed incoming calls; previous statteful processing
|
|
|
+ # guarantees that retransmissions are not accounted
|
|
|
+ if (method=="INVITE") {
|
|
|
+ acc_db_request("404 missed call", "missed_calls");
|
|
|
+ };
|
|
|
+}
|
|
|
+
|
|
|
+EOF
|
|
|
+
|
|
|
+help > /dev/stderr
|
Jiri Kuthan