---
title: "TCP Windows Full 해결 API"
url: "https://maker.wiznet.io/forum/14817"
markdown_url: "https://maker.wiznet.io/forum/14817/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "jisu.au"
created: "2023-02-27T07:27:14+09:00"
last_activity: "2023-02-27T13:08:34+09:00"
language: "ko"
views: 411
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# TCP Windows Full 해결 API

## Question

Asked by jisu.au on 2023-02-27 in Ethernet Chips.

[![image](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/1/1eb4fddf3ac16e88f7f0093a7eb3c3d532a21d18.png) image1346×371 19.6 KB](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/1/1eb4fddf3ac16e88f7f0093a7eb3c3d532a21d18.png)

현재 w6100 칩셋을 사용하고 있습니다.

send를 여러번 하는 로직이 존재합니다.

TCP Window Full 이 발생합니다.

TCP Window Full을 해결할 API가 있을까요?

## Replies

### Reply 1 by Eugeny, 2023-02-27

This is a TCP system message to the TCP sender that the receiving side has no space to receive more data. Receiver must free space within its buffer in order to receiver more data. The `recv()` call is usually used to get data from the receive buffer, and it also frees the receiving buffer for further communication with the sender.

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Source: https://maker.wiznet.io/forum/14817