--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/autocal/tsidsock.c	Sun May 21 23:00:32 2017 +0000
@@ -0,0 +1,54 @@
+/*
+ * TSID local socket interface
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <rvinterf/exitcodes.h>
+
+char *tsid_socket_pathname = "/tmp/fc_rftest_socket";
+int tsid_socket;
+
+connect_tsid_socket()
+{
+	/* local socket binding voodoo copied from osmocon */
+	struct sockaddr_un local;
+	unsigned int namelen;
+	int rc;
+
+	tsid_socket = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (tsid_socket < 0) {
+		perror("socket(AF_UNIX, SOCK_STREAM, 0)");
+		exit(ERROR_UNIX);
+	}
+
+	local.sun_family = AF_UNIX;
+	strncpy(local.sun_path, tsid_socket_pathname, sizeof(local.sun_path));
+	local.sun_path[sizeof(local.sun_path) - 1] = '\0';
+
+	/* we use the same magic that X11 uses in Xtranssock.c for
+	 * calculating the proper length of the sockaddr */
+#if defined(BSD44SOCKETS) || defined(__UNIXWARE__)
+	local.sun_len = strlen(local.sun_path);
+#endif
+#if defined(BSD44SOCKETS) || defined(SUN_LEN)
+	namelen = SUN_LEN(&local);
+#else
+	namelen = strlen(local.sun_path) +
+		  offsetof(struct sockaddr_un, sun_path) + 1;
+#endif
+
+	rc = connect(tsid_socket, (struct sockaddr *) &local, namelen);
+	if (rc != 0) {
+		perror(tsid_socket_pathname);
+		exit(ERROR_RFTEST);
+	}
+
+	return(0);
+}