papi: Use CMSG_SPACE for sizing ancillary buffer space

[vpp.git] / src / vpp-api / python / vpp_papi / vpp_stats.py

diff --git a/src/vpp-api/python/vpp_papi/vpp_stats.py b/src/vpp-api/python/vpp_papi/vpp_stats.py
index 4a342b6..8cbe737 100755 (executable)
--- a/src/vpp-api/python/vpp_papi/vpp_stats.py
+++ b/src/vpp-api/python/vpp_papi/vpp_stats.py
@@ -54,7 +54,7 @@ import re
 def recv_fd(sock):
     """Get file descriptor for memory map"""
     fds = array.array("i")  # Array of ints
-    _, ancdata, _, _ = sock.recvmsg(0, socket.CMSG_LEN(4))
+    _, ancdata, _, _ = sock.recvmsg(0, socket.CMSG_SPACE(4))
     for cmsg_level, cmsg_type, cmsg_data in ancdata:
         if cmsg_level == socket.SOL_SOCKET and cmsg_type == socket.SCM_RIGHTS:
             fds.frombytes(cmsg_data[: len(cmsg_data) - (len(cmsg_data) % fds.itemsize)])