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-rw-r--r--src/vpp-api/python/vpp_papi/vpp_transport_socket.py42
1 files changed, 24 insertions, 18 deletions
diff --git a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
index 3c3c8e514db..3c1ea326198 100644
--- a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
+++ b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
@@ -188,31 +188,37 @@ class VppTransport(object):
# Send header
header = self.header.pack(0, len(buf), 0)
- n = self.socket.send(header)
- n = self.socket.send(buf)
- if n == 0:
- raise VppTransportSocketIOError(1, 'Not connected')
+ if self.socket.sendall(header) is None:
+ raise VppTransportSocketIOError(1, 'Failed to send')
+ if self.socket.sendall(buf) is None:
+ raise VppTransportSocketIOError(1, 'Failed to send')
+
+ def _read_fixed(self, size):
+ """Repeat receive until fixed size is read. Return empty on error."""
+ buf = bytearray(size)
+ view = memoryview(buf)
+ left = size
+ while 1:
+ got = self.socket.recv_into(view, left)
+ if got <= 0:
+ # Read error.
+ return ""
+ if got >= left:
+ # TODO: Raise if got > left?
+ break
+ left -= got
+ view = view[got:]
+ return buf
def _read(self):
- hdr = self.socket.recv(16)
+ """Read single complete message, return it or empty on error."""
+ hdr = self._read_fixed(16)
if not hdr:
return
(_, hdrlen, _) = self.header.unpack(hdr) # If at head of message
# Read rest of message
- msg = self.socket.recv(hdrlen)
- if hdrlen > len(msg):
- nbytes = len(msg)
- buf = bytearray(hdrlen)
- view = memoryview(buf)
- view[:nbytes] = msg
- view = view[nbytes:]
- left = hdrlen - nbytes
- while left:
- nbytes = self.socket.recv_into(view, left)
- view = view[nbytes:]
- left -= nbytes
- return buf
+ msg = self._read_fixed(hdrlen)
if hdrlen == len(msg):
return msg
raise VppTransportSocketIOError(1, 'Unknown socket read error')