41 lines
797 B
Plaintext
41 lines
797 B
Plaintext
# Example of a udp server which sends a response
|
|
|
|
# Listen on port 20000. No host specified means 0.0.0.0
|
|
set s [socket stream.server 20000]
|
|
|
|
$s readable {
|
|
# Clean up children
|
|
wait -nohang 0
|
|
set sock [$s accept addr]
|
|
puts "Client address: $addr"
|
|
|
|
# Make this server forking so we can accept multiple
|
|
# simultaneous connections
|
|
if {[os.fork] == 0} {
|
|
$s close
|
|
|
|
$sock buffering line
|
|
|
|
# Get the request (max 80 chars) - need the source address
|
|
while {[$sock gets buf] >= 0} {
|
|
set buf [string trim $buf]
|
|
puts -nonewline "read '$buf'"
|
|
|
|
try {
|
|
set result "$buf = [expr $buf]"
|
|
} on error {msg} {
|
|
set result "Error: $buf => $msg"
|
|
}
|
|
|
|
puts ", sending '$result'"
|
|
|
|
# Send the result back to where it came from
|
|
$sock puts $result
|
|
}
|
|
}
|
|
|
|
$sock close
|
|
}
|
|
|
|
vwait done
|