extmod/modlwip: Fix close and clean up of UDP and raw sockets.

The correct callback-deregister functions must be called dependent on the
socket type, otherwise resources may not be freed correctly.

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/multi_net/udp_data.py b/tests/multi_net/udp_data.py
new file mode 100644
index 000000000..fd3e00918
--- /dev/null
+++ b/tests/multi_net/udp_data.py
@@ -0,0 +1,35 @@
+# Simple test of a UDP server and client transferring data
+
+import socket
+
+NUM_NEW_SOCKETS = 4
+NUM_TRANSFERS = 4
+PORT = 8000
+
+# Server
+def instance0():
+    multitest.globals(IP=multitest.get_network_ip())
+    multitest.next()
+    for i in range(NUM_NEW_SOCKETS):
+        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        s.bind(socket.getaddrinfo("0.0.0.0", PORT)[0][-1])
+        multitest.broadcast("server ready")
+        for j in range(NUM_TRANSFERS):
+            data, addr = s.recvfrom(1000)
+            print(data)
+            s.sendto(b"server to client %d %d" % (i, j), addr)
+        s.close()
+
+
+# Client
+def instance1():
+    multitest.next()
+    ai = socket.getaddrinfo(IP, PORT)[0][-1]
+    for i in range(NUM_NEW_SOCKETS):
+        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        multitest.wait("server ready")
+        for j in range(NUM_TRANSFERS):
+            s.sendto(b"client to server %d %d" % (i, j), ai)
+            data, addr = s.recvfrom(1000)
+            print(data)
+        s.close()