idevice: Fix mistreatment of 0-byte sent cases

Currently if 0 byte gets sent, it is treated as not-enough-data.
This is wrong, because with TCP, 0-byte-sent usually means the
receiver end is closed. We must set a new case for this and must
not normalize the sent-bytes to 0 in general.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/idevice.c b/src/idevice.c
index d6c1d06..f64570b 100644
--- a/src/idevice.c
+++ b/src/idevice.c
@@ -650,7 +650,10 @@ LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_send(idevice_connection_
                 }
                 debug_info("len %d, sent %d", len, sent);
                 if (sent < len) {
-                        *sent_bytes = 0;
+                        *sent_bytes = sent;
+                        if (sent == 0) {
+                                return IDEVICE_E_UNKNOWN_ERROR;
+                        }
                         return IDEVICE_E_NOT_ENOUGH_DATA;
                 }
                 *sent_bytes = sent;