fixed a couple of leaks spotted by Riccardo and added uwsgi.listen_queue()

master.c

@@ -4,16 +4,15 @@ extern struct uwsgi_server uwsgi;
 
 #ifdef __linux__
 void get_linux_tcp_info(int fd) {
-	struct tcp_info ti;
 	socklen_t tis = sizeof(struct tcp_info);
 
-	if (!getsockopt(fd, IPPROTO_TCP, TCP_INFO, &ti, &tis)) {
+	if (!getsockopt(fd, IPPROTO_TCP, TCP_INFO, &uwsgi.shared->ti, &tis)) {
 		// a check for older linux kernels
-		if (!ti.tcpi_sacked) {
+		if (!uwsgi.shared->ti.tcpi_sacked) {
 			return;
 		}
-		if (ti.tcpi_unacked >= ti.tcpi_sacked) {
-			uwsgi_log_verbose("*** uWSGI listen queue of socket %d full !!! (%d/%d) ***\n", fd, ti.tcpi_unacked, ti.tcpi_sacked);
+		if (uwsgi.shared->ti.tcpi_unacked >= uwsgi.shared->ti.tcpi_sacked) {
+			uwsgi_log_verbose("*** uWSGI listen queue of socket %d full !!! (%d/%d) ***\n", fd, uwsgi.shared->ti.tcpi_unacked, uwsgi.shared->ti.tcpi_sacked);
 		}
 	}
 }

plugins/python/uwsgi_pymodule.c

@@ -156,6 +156,15 @@ char *uwsgi_encode_pydict(PyObject * pydict, uint16_t * size) {
 
 }
 
+PyObject *py_uwsgi_listen_queue(PyObject * self, PyObject * args) {
+
+#ifdef __linux__
+	return PyInt_FromLong(uwsgi.shared->ti.tcpi_unacked);
+#else
+	return NULL
+#endif
+}
+
 PyObject *py_uwsgi_close(PyObject * self, PyObject * args) {
 
 	int fd;
@@ -2122,9 +2131,10 @@ PyObject *py_uwsgi_parse_file(PyObject * self, PyObject * args) {
 
 	}
 
-	goto clear;
+	goto clear2;
 
       clear3:
+	free(buffer);
 	Py_DECREF(zero);
       clear2:
 	close(fd);
@@ -2307,6 +2317,8 @@ static PyMethodDef uwsgi_advanced_methods[] = {
 	{"send", py_uwsgi_send, METH_VARARGS, ""},
 	{"cl", py_uwsgi_cl, METH_VARARGS, ""},
 
+	{"listen_queue", py_uwsgi_listen_queue, METH_VARARGS, ""},
+
 	{"attach_daemon", py_uwsgi_attach_daemon, METH_VARARGS, ""},
 
 	{"register_signal", py_uwsgi_register_signal, METH_VARARGS, ""},

uwsgi.h

@@ -1090,6 +1090,9 @@ struct uwsgi_shared {
 
 	struct uwsgi_daemon daemons[MAX_DAEMONS];
 	int daemons_cnt;
+#ifdef __linux__
+	struct tcp_info ti;
+#endif
 };
 
 struct uwsgi_core {