Rejig unix socket support.

man/mosquitto.conf.5.xml

@@ -1058,7 +1058,7 @@ log_timestamp_format %Y-%m-%dT%H:%M:%S
 					</listitem>
 				</varlistentry>
 				<varlistentry>
-					<term><option>listener</option> <replaceable>port</replaceable> <replaceable><optional>bind address/host</optional></replaceable></term>
+					<term><option>listener</option> <replaceable>port</replaceable> <replaceable><optional>bind address/host/unix socket path</optional></replaceable></term>
 					<listitem>
 						<para>Listen for incoming network connection on the
 							specified port. A second optional argument allows
@@ -1067,11 +1067,18 @@ log_timestamp_format %Y-%m-%dT%H:%M:%S
 							neither the global <option>bind_address</option>
 							nor <option>port</option> options are used then the
 							default listener will not be started.</para>
+
 						<para>The <option>bind address/host</option> option
 							allows this listener to be bound to a specific IP
 							address by passing an IP address or hostname. For
 							websockets listeners, it is only possible to pass
 							an IP address here.</para>
+
+						<para>On systems that support Unix Domain Sockets, this
+							option can also be used to create a Unix socket rather
+							than opening a TCP socket. In this case, the port must
+							be set to 0, and the unix socket path must be given.</para>
+
 						<para>This option may be specified multiple times. See
 							also the <option>mount_point</option>
 							option.</para>
@@ -1159,7 +1166,7 @@ log_timestamp_format %Y-%m-%dT%H:%M:%S
 					</listitem>
 				</varlistentry>
 				<varlistentry>
-					<term><option>socket_domain</option> [ ipv4 | ipv6 | unix ] [path to unix socket]</term>
+					<term><option>socket_domain</option> [ ipv4 | ipv6 ]</term>
 					<listitem>
 						<para>By default, a listener will attempt to listen on
 							all supported IP protocol versions. If you do not
@@ -1176,10 +1183,6 @@ log_timestamp_format %Y-%m-%dT%H:%M:%S
 							use IPv6. If you want support for both IPv4 and
 							IPv6, then do not use the
 							<option>socket_domain</option> option.</para>
-						<para>On systems that support Unix Domain Sockets, this
-							option can also be used to create a Unix socket rather
-							than opening a TCP socket. In this case, the option
-							should be in the form: <option>socket_domain unix &lt;path to socket&gt;</option>. For example: <option>socket_domain unix /tmp/mosquitto.sock</option></para>
 						<para>Not reloaded on reload signal.</para>
 					</listitem>
 				</varlistentry>

mosquitto.conf

@@ -372,7 +372,14 @@
 # interface. By default, mosquitto will listen on all interfaces.
 # Note that for a websockets listener it is not possible to bind to a host
 # name.
-# listener port-number [ip address/host name]
+#
+# On systems that support Unix Domain Sockets, it is also possible
+# to create a # Unix socket rather than opening a TCP socket. In
+# this case, the port number should be set to 0 and a unix socket
+# path must be provided, e.g.
+# listener 0 /tmp/mosquitto.sock
+#
+# listener port-number [ip address/host name/unix socket path]
 #listener
 
 # By default, a listener will attempt to listen on all supported IP protocol
@@ -386,12 +393,6 @@
 # force the listener to only use IPv6. If you want support for both IPv4 and
 # IPv6, then do not use the socket_domain option.
 #
-# On systems that support Unix Domain Sockets, this option can also be used to
-# create a Unix socket rather than opening a TCP socket. In this case, the
-# option should be in the form:
-# socket_domain unix <path to socket>
-# e.g. `socket_domain unix /tmp/mosquitto.sock`
-#
 #socket_domain
 
 # Bind the listener to a specific interface. This is similar to

src/conf.c

@@ -1369,18 +1369,48 @@ int config__read_file_core(struct mosquitto__config *config, bool reload, struct
 					token = strtok_r(NULL, " ", &saveptr);
 					if(token){
 						tmp_int = atoi(token);
+#ifdef WITH_UNIX_SOCKETS
+						if(tmp_int < 0 || tmp_int > 65535){
+#else
 						if(tmp_int < 1 || tmp_int > 65535){
+#endif
 							log__printf(NULL, MOSQ_LOG_ERR, "Error: Invalid port value (%d).", tmp_int);
 							return MOSQ_ERR_INVAL;
 						}
 
+						/* Look for bind address / unix socket path */
+						token = strtok_r(NULL, " ", &saveptr);
+						if (token != NULL && token[0] == '#'){
+							token = NULL;
+						}
+
+						if(tmp_int == 0 && token == NULL){
+							log__printf(NULL, MOSQ_LOG_ERR, "Error: A listener with port 0 must provide a Unix socket path.");
+							return MOSQ_ERR_INVAL;
+						}
+
 						if(reload){
-							/* We reload listeners settings based on port number.
-							 * If the port number doesn't already exist, exit with a complaint. */
+							/* We reload listeners settings based on port number/unix socket path.
+							 * If the port number/unix path doesn't already exist, exit with a complaint. */
 							cur_listener = NULL;
+#ifdef WITH_UNIX_SOCKETS
+							if(tmp_int == 0){
+								for(i=0; i<config->listener_count; i++){
+									if(config->listeners[i].unix_socket_path != NULL
+											&& strcmp(config->listeners[i].unix_socket_path, token) == 0){
+
+										cur_listener = &config->listeners[i];
+										break;
+									}
+								}
+							}else
+#endif
+							{
 								for(i=0; i<config->listener_count; i++){
 									if(config->listeners[i].port == tmp_int){
 										cur_listener = &config->listeners[i];
+										break;
+									}
 								}
 							}
 							if(!cur_listener){
@@ -1403,15 +1433,24 @@ int config__read_file_core(struct mosquitto__config *config, bool reload, struct
 						cur_listener->port = tmp_int;
 						cur_listener->maximum_qos = 2;
 						cur_listener->max_topic_alias = 10;
-						token = strtok_r(NULL, " ", &saveptr);
-						if (token != NULL && token[0] == '#'){
-							token = NULL;
-						}
+
 						mosquitto__free(cur_listener->host);
+						cur_listener->host = NULL;
+
+#ifdef WITH_UNIX_SOCKETS
+						mosquitto__free(cur_listener->unix_socket_path);
+						cur_listener->unix_socket_path = NULL;
+#endif
+
 						if(token){
+#ifdef WITH_UNIX_SOCKETS
+							if(cur_listener->port == 0){
+								cur_listener->unix_socket_path = mosquitto__strdup(token);
+							}else
+#endif
+							{
 								cur_listener->host = mosquitto__strdup(token);
-						}else{
-							cur_listener->host = NULL;
+							}
 						}
 					}else{
 						log__printf(NULL, MOSQ_LOG_ERR, "Error: Empty listener value in configuration.");
@@ -1907,21 +1946,6 @@ int config__read_file_core(struct mosquitto__config *config, bool reload, struct
 							cur_listener->socket_domain = AF_INET;
 						}else if(!strcmp(token, "ipv6")){
 							cur_listener->socket_domain = AF_INET6;
-#ifdef WITH_UNIX_SOCKETS
-						}else if(!strcmp(token, "unix")){
-							cur_listener->socket_domain = AF_UNIX;
-							token = strtok_r(NULL, " ", &saveptr);
-							if(token){
-								cur_listener->unix_socket_path = mosquitto__strdup(token);
-								if(cur_listener->unix_socket_path == NULL){
-									log__printf(NULL, MOSQ_LOG_ERR, "Error: Out of memory.");
-									return MOSQ_ERR_NOMEM;
-								}
-							}else{
-								log__printf(NULL, MOSQ_LOG_ERR, "Error: Empty socket_domain unix socket path in configuration.");
-								return MOSQ_ERR_INVAL;
-							}
-#endif
 						}else{
 							log__printf(NULL, MOSQ_LOG_ERR, "Error: Invalid socket_domain value \"%s\" in configuration.", token);
 							return MOSQ_ERR_INVAL;

src/net.c

@@ -730,7 +730,7 @@ int net__socket_listen(struct mosquitto__listener *listener)
 	if(!listener) return MOSQ_ERR_INVAL;
 
 #ifdef WITH_UNIX_SOCKETS
-	if(listener->socket_domain == AF_UNIX){
+	if(listener->port == 0 && listener->unix_socket_path != NULL){
 		rc = net__socket_listen_unix(listener);
 	}else
 #endif