From 692f7c9de72ca7fcaba51659972270d445751438 Mon Sep 17 00:00:00 2001
From: BALATON Zoltan <balaton@eik.bme.hu>
Date: Wed, 23 Sep 2015 02:19:27 +0200
Subject: [PATCH] Add new function to get the underlying file descriptor of an
 idevice connection

---
 include/libimobiledevice/libimobiledevice.h | 10 ++++++++++
 src/idevice.c                               | 16 ++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/include/libimobiledevice/libimobiledevice.h b/include/libimobiledevice/libimobiledevice.h
index 016cadb..b125adf 100644
--- a/include/libimobiledevice/libimobiledevice.h
+++ b/include/libimobiledevice/libimobiledevice.h
@@ -239,6 +239,16 @@ idevice_error_t idevice_connection_enable_ssl(idevice_connection_t connection);
  */
 idevice_error_t idevice_connection_disable_ssl(idevice_connection_t connection);
 
+/**
+ * Get the underlying file descriptor for a connection
+ *
+ * @param connection The connection to get fd of
+ * @param fd Pointer to an int where the fd is stored
+ *
+ * @return IDEVICE_E_SUCCESS if ok, otherwise an error code.
+ */
+idevice_error_t idevice_connection_get_fd(idevice_connection_t connection, int *fd);
+
 /* misc */
 
 /**
diff --git a/src/idevice.c b/src/idevice.c
index b776e84..5912aeb 100644
--- a/src/idevice.c
+++ b/src/idevice.c
@@ -463,6 +463,22 @@ LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_receive(idevice_connecti
 	return internal_connection_receive(connection, data, len, recv_bytes);
 }
 
+LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_get_fd(idevice_connection_t connection, int *fd)
+{
+	if (!connection || !fd) {
+		return IDEVICE_E_INVALID_ARG;
+	}
+
+	idevice_error_t result = IDEVICE_E_UNKNOWN_ERROR;
+	if (connection->type == CONNECTION_USBMUXD) {
+		*fd = (int)(long)connection->data;
+		result = IDEVICE_E_SUCCESS;
+	} else {
+		debug_info("Unknown connection type %d", connection->type);
+	}
+	return result;
+}
+
 LIBIMOBILEDEVICE_API idevice_error_t idevice_get_handle(idevice_t device, uint32_t *handle)
 {
 	if (!device)
-- 
2.9.3