diff options
| -rw-r--r-- | nuttx/net/recvfrom.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/nuttx/net/recvfrom.c b/nuttx/net/recvfrom.c index 679b5e8ce..ac8065f81 100644 --- a/nuttx/net/recvfrom.c +++ b/nuttx/net/recvfrom.c @@ -563,12 +563,18 @@ static uint16_t recvfrom_tcpinterrupt(struct uip_driver_s *dev, void *conn, pstate->rf_cb->priv = NULL; pstate->rf_cb->event = NULL; - /* If the peer gracefully closed the connection, then return zero - * (end-of-file). Otherwise, report a not-connected error - * _SF_CONNECTED==0 && _SF_CLOSED==1 - the socket was - * gracefully disconnected - * _SF_CONNECTED==0 && _SF_CLOSED==0 - the socket was - * rudely disconnected + /* Check if the peer gracefully closed the connection. We need + * these flags in case we return zero (below) to remember the + * state of the connection. + * + * _SF_CONNECTED==0 && _SF_CLOSED==1 - the socket was + * gracefully disconnected + * _SF_CONNECTED==0 && _SF_CLOSED==0 - the socket was + * rudely disconnected + * + * These flag settings are probably not necessary if + * CONFIG_NET_TCP_RECVDELAY == 0; in that case we know that + * pstate->rf_recvlen == 0 and we will always return -ENOTCONN. */ psock = pstate->rf_sock; @@ -587,6 +593,7 @@ static uint16_t recvfrom_tcpinterrupt(struct uip_driver_s *dev, void *conn, * be reported the next time that recv[from]() is called. */ +#if CONFIG_NET_TCP_RECVDELAY > 0 if (pstate->rf_recvlen > 0) { pstate->rf_result = 0; @@ -595,6 +602,9 @@ static uint16_t recvfrom_tcpinterrupt(struct uip_driver_s *dev, void *conn, { pstate->rf_result = -ENOTCONN; } +#else + pstate->rf_result = -ENOTCONN; +#endif /* Wake up the waiting thread */ |