commit 048de76320286dff31992fcdb1f3d89e71e8d28d Author: Ana Custura ana@netstat.org.uk Date: Wed Mar 6 14:37:46 2019 +0100

Documents find_ip_address_local() and get_random_free_port() --- onionperf/util.py | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)

diff --git a/onionperf/util.py b/onionperf/util.py index 84fb58a..2448600 100644 --- a/onionperf/util.py +++ b/onionperf/util.py @@ -131,6 +131,14 @@ def find_ip_address_url(data): return ip_address

def find_ip_address_local(): + """ + Determines the local IP address of the host by opening a socket + connection to an external address. In doing so, the address used by the + host for initiating connections can be retrieved and then returned. + + :returns: string + """ + s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.connect(("8.8.8.8", 53)) ip_address = s.getsockname()[0] @@ -166,6 +174,14 @@ def get_ip_address(): return ip_address

def get_random_free_port(): + """ + Picks a random high port and checks its availability by opening a + socket connection to localhost on this port. If this raises an exception + the process is repeated until a free port is found. + + :returns: int + """ + while True: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) port = random.randint(10000, 60000)