active_n

Benchmark the {active, N} and async_recv.

recv_eprof:start(Port = 6000, async_recv, 10000).

recv_eprof:start(Port = 5000, active_n, 10000).

async_recv

client

TCP echo client.

dtls

The DTLS echo server which listens on port 5000.

Start a DTLS client:

openssl s_client -dtls1 -connect 127.0.0.1:5000 -debug

dtls_psk

The DTLS echo server which listens on port 5000.

Start a DTLS client:

Client = dtls_psk_client:connect().
dtls_psk_client:send(Client, <<"hi">>).

gen_server

plain

proxy_protocol

simple

ssl

Start the SSL echo server which listens on port 5000:

ssl_echo_server:start(5000).

Start a SSL client:

openssl s_client -tls1 -debug -connect 127.0.0.1:5000

tcp_window

rebar3 shell and run tcp_window test:

tcp_window:start(5000, sync).
tcp_window:start(5000, async).
tcp_window:start(5000, async_force).
tcp_window:start(5000, async_nosuspend).

TCP Window Full:

Send Function	Socket Options	TCP Window full
gen_tcp:send(Socket, Data)	{send_timeout, infinity}	Block forever.
port_command(Socket, Data)	{send_timeout, infinity}	Block forever.
port_command(Socket, Data, [force])	{send_timeout, infinity}	Return true always. Write to TCP Stack.
port_command(Socket, Data, [nosuspend])	{send_timeout, infinity}	Return false always. Drop the packets silently.
gen_tcp:send(Socket, Data)	{send_timeout, 5000}	Return {error, timeout}.
port_command(Socket, Data)	{send_timeout, 5000}	Return true always. Pause 5 seconds and Drop packets silently.
port_command(Socket, Data, [force])	{send_timeout, 5000}	Return true always. Write to TCP Stack.
port_command(Socket, Data, [nosuspend])	{send_timeout, 5000}	Return false first, and true after timeout. Drop the packets silently.

Conclusions:

1. Should set the send_timeout option if using gen_tcp:send
2. Should not set the nosuspend option if using port_command, for the busy sock will be killed at once.

udp

Start the UDP echo server which listens on port 5000.

udp_echo_server:start(5000).