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https://github.com/cwyark/sdk-ameba-v4.0b_without_nda_gcc.git
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27 lines
1.3 KiB
Text
27 lines
1.3 KiB
Text
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LWIP TCP KEEPALIVE EXAMPLE
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Description:
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Example for socket client and server implementation to break out of blocking read by TCP keepalive timeout.
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Configuration:
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[lwipopts.h]
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#define LWIP_TCP_KEEPALIVE 1
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[platform_opts.h]
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#define CONFIG_EXAMPLE_TCP_KEEPALIVE 1
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Execution:
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Can make automatical Wi-Fi connection when booting by using wlan fast connect example.
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A TCP keepalive example thread will be started automatically when booting.
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Setup TEST_MODE in example_tcp_keepalive.c to verify client or server examples. Modify SERVER_IP and SERVER_PORT for client keepalive test. Modify SERVER_PORT for server keepalive test. Modify keepalive timeout by setting keepalive idle, interval and count value to socket options based on requirement.
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1. For client TCP keepalive example, example thread connects to indicated server and continue to perform blocking read.
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When using ATWD command to disconnect wifi, client thread will break out of blocking read after keepalive timeout
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2. For server TCP keepalive example, example thread listens on indicated port and read data from the accepted connection.
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Please use a client program to connect to server port of example thread
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When using ATWD command to disconnect wifi, server thread will get select read event after keepalive timeout
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