2 files changed, 12 insertions, 0 deletions

diff --git a/src/iphone.c b/src/iphone.c
index 77b67c3..6833e4c 100644
--- a/src/iphone.c
+++ b/src/iphone.c
@@ -148,6 +148,8 @@ int send_to_phone(iPhone *phone, char *data, int datalen) {
         bytes = usb_bulk_write(phone->device, BULKOUT, data, datalen, 800);
         if (debug) printf("noooo...?\n");
         if (bytes < datalen) {
+                if(debug && bytes < 0)
+                        printf("send_to_iphone(): libusb gave me the error: %s\n", usb_strerror());
                 return -1;
         } else {
                 return bytes;
@@ -169,6 +171,11 @@ int recv_from_phone(iPhone *phone, char *data, int datalen) {
         if (!phone) return -1;
         int bytes = 0;
         bytes = usb_bulk_read(phone->device, BULKIN, data, datalen, 3500);
+        if(bytes < 0)
+        {
+                if(debug) printf("recv_from_iphone(): libusb gave me the error: %s\n", usb_strerror());
+                return -1;
+        }
         return bytes;
 }
 
diff --git a/src/usbmux.c b/src/usbmux.c
index 474b13e..bdeea09 100644
--- a/src/usbmux.c
+++ b/src/usbmux.c
@@ -112,7 +112,12 @@ void mux_close_connection(iPhone *phone, usbmux_tcp_header *connection) {
         int bytes = 0;
         
         bytes = usb_bulk_write(phone->device, BULKOUT, (char*)connection, sizeof(*connection), 800);
+        if(debug && bytes < 0)
+                printf("mux_close_connection(): when writing, libusb gave me the error: %s\n", usb_strerror());
+
         bytes = usb_bulk_read(phone->device, BULKIN, (char*)connection, sizeof(*connection), 800);
+        if(debug && bytes < 0)
+                printf("get_iPhone(): when reading, libusb gave me the error: %s\n", usb_strerror());
         
         free(connection);
 }