1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
start_client() {
local in="$TEMPDIR/client.in" out="$TEMPDIR/client.out"
mkfifo -- "$in" "$out"
$NC ${NETCAT_DGRAM:+-u} "$@" "127.0.0.1" $PORT <"$in" >"$out" {LISTEN_IN}>&- {LISTEN_OUT}<&- & CLIENT_PID=$!
exec {CONNECT_IN}>"$in" {CONNECT_OUT}<"$out"
rm -f -- "$in" "$out"
}
#######################################################################
# server
PORT=$(random_port)
PIPES="y" netcat_listen ${NETCAT_DGRAM:+-u} -W3 "127.0.0.1" $PORT
start_client
greet server client0 # packet1
greet client server0
greet server client1 # packet2
greet client server1
greet client server2
greet client server3
greet server client2 # packet3
wait $PID
kill_and_wait $CLIENT_PID
#######################################################################
# client
PORT=$(random_port)
PIPES="y" netcat_listen ${NETCAT_DGRAM:+-u} "127.0.0.1" $PORT
start_client -W3
greet server client0
greet client server0 # packet1
greet server client1
greet server client2
greet client server1 # packet2
greet server client3
greet server client4
greet client server2 # packet3
wait $CLIENT_PID
${NETCAT_DGRAM:+kill_and_}wait $PID
# vim: set filetype=bash :
|
