Add systemd notification support

ChangeLog

@@ -32,7 +32,8 @@ Version 4.5.2 'dan Eider':
 	- Fix stale-nonce documentation. Resolves #604
 	- Version number is changed to semver 2.0
 	- Merge PR #288 (by Hristo Venev)
-		* pkg-config, and various cleanups in connfigure file	
+		* pkg-config, and various cleanups in connfigure file
+	- Add systemd notification for better systemd integration
 
 24/06/2020 Oleg Moskalenko <mom040267@gmail.com> Mihály Mészáros <misi@majd.eu>
 Version 4.5.1.3 'dan Eider':

README.turnserver

@@ -158,6 +158,8 @@ Flags:
 
 -o, --daemon		Run server as daemon.
 
+--systemd			Notify systemd about server status. (Use only in forground!)
+
 --no-software-attribute	Production mode: hide the software version.
 
 -f, --fingerprint	Use fingerprints in the TURN messages. If an incoming request

configure

@@ -864,6 +864,21 @@ else
 	OSCFLAGS="${OSCFLAGS} -DTURN_NO_PROMETHEUS"
 fi
 
+###########################
+# Test libsystemd
+###########################
+
+if [ -z "${TURN_NO_SYSTEMD}" ] ; then
+    if testpkg_common libsystemd; then
+        ${ECHO_CMD} "Systemd library found."
+    else
+        ${ECHO_CMD} "Systemd library not found. Building without systemd support."
+        TURN_NO_PQ="-DTURN_NO_SYSTEMD"
+    fi
+else
+    TURN_NO_PQ="-DTURN_NO_SYSTEMD"
+fi
+
 ###########################
 # Test SQLite3 setup
 ###########################

docker/coturn/Dockerfile

@@ -6,7 +6,7 @@ ENV BUILD_PREFIX /usr/local/src
 # Install build dependencies
 RUN export DEBIAN_FRONTEND=noninteractive && \
 	apt-get update && \
-	apt-get install -y build-essential git debhelper dpkg-dev libssl-dev libevent-dev sqlite3 libsqlite3-dev postgresql-client libpq-dev default-mysql-client default-libmysqlclient-dev libhiredis-dev libmongoc-dev libbson-dev
+	apt-get install -y build-essential git debhelper dpkg-dev libssl-dev libevent-dev sqlite3 libsqlite3-dev postgresql-client libpq-dev default-mysql-client default-libmysqlclient-dev libhiredis-dev libmongoc-dev libbson-dev libsystemd-dev
 
 # Clone Coturn
 WORKDIR ${BUILD_PREFIX}

examples/etc/coturn.service

@@ -9,12 +9,10 @@ Wants=network-online.target
 [Service]
 User=turnserver
 Group=turnserver
-Type=forking
+Type=notify
 RuntimeDirectory=turnserver
 PIDFile=/run/turnserver/turnserver.pid
-ExecStart=/usr/bin/turnserver --daemon -c /etc/turnserver.conf --pidfile /run/turnserver/turnserver.pid
+ExecStart=/usr/bin/turnserver --systemd -c /etc/turnserver.conf --pidfile /run/turnserver/turnserver.pid
-#FixMe: turnserver exit faster than it is finshing the setup and ready for handling the connection.
-ExecStartPost=/bin/sleep 2
 Restart=on-failure
 InaccessibleDirectories=/home
 PrivateTmp=yes

man/man1/turnadmin.1

@@ -1,5 +1,5 @@
 .\" Text automatically generated by txt2man
-.TH TURN 1 "05 January 2021" "" ""
+.TH TURN 1 "07 January 2021" "" ""
 .SH GENERAL INFORMATION
 
 \fIturnadmin\fP is a TURN administration tool. This tool can be used to manage

man/man1/turnserver.1

@@ -1,5 +1,5 @@
 .\" Text automatically generated by txt2man
-.TH TURN 1 "05 January 2021" "" ""
+.TH TURN 1 "07 January 2021" "" ""
 .SH GENERAL INFORMATION
 
 The \fBTURN Server\fP project contains the source code of a TURN server and TURN client
@@ -230,6 +230,10 @@ Extra verbose mode, very annoying and not recommended.
 .B
 \fB\-o\fP, \fB\-\-daemon\fP
 Run server as daemon.
+.TP
+.B
+\fB\-\-systemd\fP
+Notify systemd about server status. (Use only in forground!)
 .PP
 \fB\-\-no\-software\-attribute\fP Production mode: hide the software version.
 .TP

man/man1/turnutils.1

@@ -1,5 +1,5 @@
 .\" Text automatically generated by txt2man
-.TH TURN 1 "05 January 2021" "" ""
+.TH TURN 1 "07 January 2021" "" ""
 .SH GENERAL INFORMATION
 
 A set of turnutils_* programs provides some utility functionality to be used

rpm/turnserver.service.fc

@@ -6,10 +6,10 @@ After=syslog.target network.target
 [Service]
 User=turnserver
 Group=turnserver
-Type=forking
+Type=notify
 EnvironmentFile=/etc/sysconfig/turnserver
 PIDFile=/var/run/turnserver/turnserver.pid
-ExecStart=/usr/bin/turnserver -o -c /etc/turnserver/turnserver.conf $EXTRA_OPTIONS
+ExecStart=/usr/bin/turnserver --systemd -c /etc/turnserver/turnserver.conf $EXTRA_OPTIONS
 ExecStopPost=/usr/bin/rm -f /var/run/turnserver/turnserver.pid
 Restart=on-abort
 

src/apps/relay/mainrelay.c

@@ -170,7 +170,8 @@ DEFAULT_CPUS_NUMBER,
 0,  /* no_dynamic_ip_list */
 0,  /* no_dynamic_realms */
 
-0   /* log_binding */
+0,  /* log_binding */
+0   /* systemd */
 };
 
 //////////////// OpenSSL Init //////////////////////
@@ -463,6 +464,7 @@ static char Usage[] = "Usage: turnserver [options]\n"
 " -v, --verbose					'Moderate' verbose mode.\n"
 " -V, --Verbose					Extra verbose mode, very annoying (for debug purposes only).\n"
 " -o, --daemon					Start process as daemon (detach from current shell).\n"
+" --systemd					Notify systemd about server status. (Use only in forground!)\n"
 " --no-software-attribute	 		Production mode: hide the software version (formerly --prod).\n"
 " -f, --fingerprint				Use fingerprints in the TURN messages.\n"
 " -a, --lt-cred-mech				Use the long-term credential mechanism.\n"
@@ -813,7 +815,8 @@ enum EXTRA_OPTS {
 	NO_HTTP_OPT,
 	SECRET_KEY_OPT,
 	ACME_REDIRECT_OPT,
-	LOG_BINDING_OPT
+	LOG_BINDING_OPT,
+	SYSTEMD_OPT
 };
 
 struct myoption {
@@ -949,6 +952,7 @@ static const struct myoption long_options[] = {
 				{ "keep-address-family", optional_argument, NULL, 'K' },
 				{ "acme-redirect", required_argument, NULL, ACME_REDIRECT_OPT },
 				{ "log-binding", optional_argument, NULL, LOG_BINDING_OPT },
+				{ "systemd", optional_argument, NULL, SYSTEMD_OPT },
 
 				{ NULL, no_argument, NULL, 0 }
 };
@@ -1606,6 +1610,9 @@ static void set_option(int c, char *value)
 	case LOG_BINDING_OPT:
 		turn_params.log_binding = get_bool_value(value);
 		break;
+	case SYSTEMD_OPT:
+		turn_params.systemd = get_bool_value(value);
+		break;
 
 	/* these options have been already taken care of before: */
 	case 'l':

src/apps/relay/mainrelay.h

@@ -85,6 +85,10 @@
   #include <openssl/modes.h>
 #endif
 
+#if !defined(TURN_NO_SYSTEMD)
+#include <systemd/sd-daemon.h>
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -335,6 +339,8 @@ typedef struct _turn_params_ {
 
   vint log_binding;
   
+  vint systemd;
+
 } turn_params_t;
 
 extern turn_params_t turn_params;

src/apps/relay/netengine.c

@@ -1590,6 +1590,11 @@ void run_listener_server(struct listener_server *ls)
 	unsigned int cycle = 0;
 	while (!turn_params.stop_turn_server) {
 
+		#if !defined(TURN_NO_SYSTEMD)
+		if(turn_params.systemd)
+			sd_notify (0, "READY=1");
+		#endif
+
 		if (eve(turn_params.verbose)) {
 			if ((cycle++ & 15) == 0) {
 				TURN_LOG_FUNC(TURN_LOG_LEVEL_INFO, "%s: cycle=%u\n", __FUNCTION__, cycle);
@@ -1600,6 +1605,11 @@ void run_listener_server(struct listener_server *ls)
 
 		rollover_logfile();
 	}
+
+	#if !defined(TURN_NO_SYSTEMD)
+	if(turn_params.systemd)
+		sd_notify (0, "STOPPING=1");
+	#endif
 }
 
 static void setup_relay_server(struct relay_server *rs, ioa_engine_handle e, int to_set_rfc5780)