Rewrite config and systemd service as a template

README.md

@@ -178,42 +178,22 @@ It will be the script to manage the current status of t38modem.
 # /etc/t38modem/bin/run
 
 export LD_LIBRARY_PATH=/usr/local/lib
-export PTLIBPLUGINDIR=/usr/local/lib/ptlib-x.y.z:/usr/local/lib/opal-a.b.c # Adjust lib versions!
+export PTLIBPLUGINDIR=/usr/local/lib/ptlib-2.18.6:/usr/local/lib/opal-3.18.6 # Adjust lib versions!
 
-case "$1" in
+if [ -z "${1}" ]; then
-	start)
+	>&2 echo "Config file path not set! Aborting..."
-		. /etc/t38modem/config
-		# defines
-		# - T38MODEM_SIP_USERNAME
-		# - T38MODEM_SIP_PASSWORD
-		# - T38MODEM_SIP_SERVER
-
-		COMMAND="t38modem -u T38modem --ptty +/dev/ttyT38-1 --sip-proxy ${T38MODEM_SIP_USERNAME}:${T38MODEM_SIP_PASSWORD}@${T38MODEM_SIP_SERVER} --sip-register ${T38MODEM_SIP_USERNAME}@${T38MODEM_SIP_SERVER},${T38MODEM_SIP_PASSWORD} --sip-listen udp\$:5060 --route t38:.*=sip:<dn>@${T38MODEM_SIP_SERVER} --route sip:.*=t38:<dn>"
-		echo "${COMMAND}"
-		exec $COMMAND > /dev/null 2>&1 &
-		PID=$!
-		echo "Starting t38modem with pid $PID (pidfile /run/t38modem.pid)"
-		echo $PID > /run/t38modem.pid
-	;;
-	stop)
-		if [ ! -f "/run/t38modem.pid" ]; then
-			echo "t38modem is not running! (/run/t38modem.pid does not exist)"
 	exit 1
 fi
 
-		echo -n "Stopping t38modem pid: "
+. "${1}"
-		PID=`cat /run/t38modem.pid`
-		kill -9 $PID
-		rm /run/t38modem.pid
-		echo "${PID} Done"
-	;;
-	*)
-		echo "Usage: $0 {start|stop}"
-		exit 1
-	;;
-esac
 
-exit 0
+command="t38modem --ptty +/dev/ttyT38-${T38MODEM_PTTY_ID} --sip-proxy ${T38MODEM_SIP_USERNAME}:${T38MODEM_SIP_PASSWORD}@${T38MODEM_SIP_SERVER} --sip-register ${T38MODEM_SIP_USERNAME}@${T38MODEM_SIP_SERVER},${T38MODEM_SIP_PASSWORD} --sip-listen udp\$:5060 --stun ${T38MODEM_STUN_SERVER} --route t38:.*=sip:<dn>@${T38MODEM_SIP_SERVER} --route sip:.*=t38:<dn>"
+
+if [ "$T38MODEM_DISABLE_T38" = true ]; then
+	command="${command} --disable-t38-mode --audio"
+fi
+
+exec $command
 ```
 
 And then we'll have to make it executable like this.
@@ -223,32 +203,34 @@ sudo chmod +x /etc/t38modem/bin/run
 ```
 
 #### Quick script overview
-- Using that script, it is possible to `start` or `stop` the emulated modem.
+- Using this script, it is possible to start t38modem with a config file as an argument 
 - `-t` enables debugging
   - More `t`'s is deeper debugging (e.g. `-tttt`)
-- You can of course run the t38modem command without this init script
 - If t38modem says it was able to create the virtual modem but `/dev/ttyT38-1` is not available, you do not have sufficient permissions
-- Configuration is specified in `/etc/t38modem/config`
+- Configuration is specified in `/etc/t38modem/config/XX`
 
 ### Create the configuration file
-Create a file using the following contents at `/etc/t38modem/config`.
+Create a file using the following contents at `/etc/t38modem/config/XX`.
 
 ```bash
 # /etc/t38modem/config
+T38MODEM_PTTY_ID="XX" # /dev/ttyT38-XX
 T38MODEM_SIP_USERNAME="USERNAME"
 T38MODEM_SIP_PASSWORD="PASSWORD"
 T38MODEM_SIP_SERVER="voip.example.com"
+T38MODEM_STUN_SERVER="stun.example.com:1234"
+T38MODEM_DISABLE_T38=false # enable if your SIP server prefers G.711
 ```
 
 You should give only root access to the config.
 
 ```bash
-sudo chown root:root /etc/t38modem/config
+sudo chown root:root -R /etc/t38modem/config/
-sudo chmod 700 /etc/t38modem/config
+sudo chmod 700 -R /etc/t38modem/config/
 ```
 
 ### Testing your setup
-- You can now communicate with your modem `/dev/ttyT38-1`, just as if it was a real Hayes compatible modem (https://www.computerhope.com/atcom.htm)
+- You can now communicate with your modem `/dev/ttyT38-XX`, just as if it was a real Hayes compatible modem (https://www.computerhope.com/atcom.htm)
 - Test using minicom, configure it to point to our modem. Each command is initiated by a Return
   - Dial a number:
     - Get the attention of the modem: `at` -> `OK`
@@ -265,33 +247,31 @@ sudo chmod 700 /etc/t38modem/config
   - Test the command before running the init script!
 
 ### systemd service
-If you want to run a fax server, you can create a systemd service to let your emulated fax modem start automatically on system boot.
+If you want to run a fax server, you can create a systemd service template to let your emulated fax modem start automatically on system boot.
-To do this you have to copy paste the following into `/etc/systemd/system/t38modem.service`.
+To do this you have to copy paste the following into `/etc/systemd/system/t38modem@.service`.
 
 ```toml
-# /etc/systemd/system/t38modem.service
+# /etc/systemd/system/t38modem@.service
 [Unit]
 Description=t38modem
 After=network-online.target
 Wants=network-online.target
+AssertPathExists=/etc/t38modem/config/%i
 
 [Service]
 Type=simple
-ExecStart=/etc/t38modem/bin/run start
-ExecStop=/etc/t38modem/bin/run stop
-PIDFile=/run/t38modem.pid
-KillMode=none
 Restart=always
+ExecStart=/etc/t38modem/bin/run /etc/t38modem/config/%i
 
 [Install]
 WantedBy=multi-user.target
 ```
-Enable and start the service using the following commands:
+Enable and start the service for your config file (`/etc/t38modem/config/XX`) using the following commands:
 
 ```bash
 sudo systemctl daemon-reload
-sudo systemctl enable t38modem.service
+sudo systemctl enable t38modem@XX.service
-sudo systemctl start t38modem.service
+sudo systemctl start t38modem@XX.service
 ```
 
 <hr/>
@@ -305,7 +285,7 @@ sudo systemctl start t38modem.service
 - Run `sudo faxsetup`
 
   - Add new modem
-  - Enter correct modem port (`ttyT38-1`)
+  - Enter correct modem port (`ttyT38-XX`)
   - Enter dialing configuration
   - Accept default configuration for everything else
   - It should automatically detect it to be a `T38FAX` modem
@@ -315,6 +295,7 @@ sudo systemctl start t38modem.service
 
   - If you get some protocol errors, just let HylaFax do its thing.
     Fax over SIP is not stable at all in my experience
+  - If your call is cleared because it `Could not find common media capabilities` t38modem may not have been able to load PTLib or Opal. Check your library paths!
 
 
 ## Cron
@@ -342,6 +323,7 @@ FaxMaster: $USER # replace with fax admin account
 ## Dial Rules for Eventphone
 
 ```
+# /etc/hylafax/config.ttyXX
 CountryCode:	1
 AreaCode:		999
 ```