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| -rw-r--r-- | tests/socket.test | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/tests/socket.test b/tests/socket.test index d43c41c..a3e5704 100644 --- a/tests/socket.test +++ b/tests/socket.test @@ -69,7 +69,22 @@ testConstraint exec [llength [info commands exec]] # Produce a random port number in the Dynamic/Private range # from 49152 through 65535. -proc randport {} { expr {int(rand()*16383+49152)} } +proc randport {} { + # firstly try dynamic port via server-socket(0): + set port 0x7fffffff + catch { + set port [lindex [fconfigure [set s [socket -server {} 0]] -sockname] 2] + close $s + } + while {[catch { + close [socket -server {} $port] + } msg]} { + if {[incr i] > 1000} {return -code error "too many iterations to get free random port: $msg"} + # try random port: + set port [expr {int(rand()*16383+49152)}] + } + return $port +} # Test the latency of tcp connections over the loopback interface. Some OSes # (e.g. NetBSD) seem to use the Nagle algorithm and delayed ACKs, so it takes |