extmod/modlwip: Set POLLHUP flag for sockets that are new.

This matches CPython behaviour on Linux: a socket that is new and not
listening or connected is considered "hung up".

Thanks to @rkojedzinszky for the initial patch, PR #3457.
Damien George 5 years ago
parent dd13065843
commit 1e2a6a84a2

@ -723,6 +723,9 @@ STATIC mp_obj_t lwip_socket_listen(mp_obj_t self_in, mp_obj_t backlog_in) {
socket->pcb.tcp = new_pcb;
tcp_accept(new_pcb, _lwip_tcp_accept);
// Socket is no longer considered "new" for purposes of polling
socket->state = STATE_CONNECTING;
return mp_const_none;
STATIC MP_DEFINE_CONST_FUN_OBJ_2(lwip_socket_listen_obj, lwip_socket_listen);
@ -1176,7 +1179,10 @@ STATIC mp_uint_t lwip_socket_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_
if (socket->state == STATE_PEER_CLOSED) {
if (socket->state == STATE_NEW) {
// New sockets are not connected so set HUP
ret |= flags & MP_STREAM_POLL_HUP;
} else if (socket->state == STATE_PEER_CLOSED) {
// Peer-closed socket is both readable and writable: read will
// return EOF, write - error. Without this poll will hang on a
// socket which was closed by peer.