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psock_tcp_recvfrom: Add a comment about window updates

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YAMAMOTO Takashi 2021-05-28 17:02:42 +09:00 committed by Xiang Xiao
parent 02b244cb6f
commit 0c606ecb8e
1 changed files with 6 additions and 1 deletions
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7
net/tcp/tcp_recvfrom.c
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@ -809,7 +809,12 @@ ssize_t psock_tcp_recvfrom(FAR struct socket *psock, FAR void *buf,
} }
} }
/* Receive additional data from read-ahead buffer, send the ACK timely. */ /* Receive additional data from read-ahead buffer, send the ACK timely.
*
* Revisit: Because IOBs are system-wide resources, consuming the read
* ahead buffer would update recv window of all connections in the system,
* not only this particular connection.
*/
if (conn->rcv_wnd == 0 && conn->rcv_ackcb == NULL) if (conn->rcv_wnd == 0 && conn->rcv_ackcb == NULL)
{ {