stream: add support for UNIX stream services

src/libstrongswan/networking/streams/stream_manager.c

@@ -248,6 +248,7 @@ METHOD(stream_manager_t, destroy, void,
 	private_stream_manager_t *this)
 {
 	remove_stream(this, stream_create_unix);
+	remove_service(this, stream_service_create_unix);
 
 	this->streams->destroy(this->streams);
 	this->services->destroy(this->services);
@@ -281,6 +282,7 @@ stream_manager_t *stream_manager_create()
 	);
 
 	add_stream(this, "unix://", stream_create_unix);
+	add_service(this, "unix://", stream_service_create_unix);
 
 	return &this->public;
 }

src/libstrongswan/networking/streams/stream_service.c

@@ -17,7 +17,11 @@
 #include <threading/thread.h>
 #include <processing/jobs/callback_job.h>
 
+#include <errno.h>
 #include <unistd.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
 
 typedef struct private_stream_service_t private_stream_service_t;
 
@@ -154,3 +158,50 @@ stream_service_t *stream_service_create_from_fd(int fd)
 
 	return &this->public;
 }
+
+/**
+ * See header
+ */
+stream_service_t *stream_service_create_unix(char *uri)
+{
+	struct sockaddr_un addr;
+	mode_t old;
+	int fd, len;
+
+	len = stream_parse_uri_unix(uri, &addr);
+	if (len == -1)
+	{
+		DBG1(DBG_NET, "invalid stream URI: '%s'", uri);
+		return NULL;
+	}
+	fd = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (fd == -1)
+	{
+		DBG1(DBG_NET, "opening socket '%s' failed: %s", uri, strerror(errno));
+		return NULL;
+	}
+	unlink(addr.sun_path);
+
+	old = umask(~(S_IRWXU | S_IRWXG));
+	if (bind(fd, (struct sockaddr*)&addr, len) < 0)
+	{
+		DBG1(DBG_NET, "binding socket '%s' failed: %s", uri, strerror(errno));
+		close(fd);
+		return NULL;
+	}
+	umask(old);
+	if (chown(addr.sun_path, lib->caps->get_uid(lib->caps),
+			  lib->caps->get_gid(lib->caps)) != 0)
+	{
+		DBG1(DBG_NET, "changing socket permissions for '%s' failed: %s",
+			 uri, strerror(errno));
+	}
+	if (listen(fd, 5) < 0)
+	{
+		DBG1(DBG_NET, "listen on socket '%s' failed: %s", uri, strerror(errno));
+		unlink(addr.sun_path);
+		close(fd);
+		return NULL;
+	}
+	return stream_service_create_from_fd(fd);
+}

src/libstrongswan/networking/streams/stream_service.h

@@ -75,4 +75,12 @@ struct stream_service_t {
  */
 stream_service_t *stream_service_create_from_fd(int fd);
 
+/**
+ * Create a service instance for UNIX sockets.
+ *
+ * @param uri		UNIX socket specific URI, must start with "unix://"
+ * @return			stream_service instance, NULL on failure
+ */
+stream_service_t *stream_service_create_unix(char *uri);
+
 #endif /** STREAM_SERVICE_H_ @}*/