commit 3d8cf6f801ab42a12d9efd58ba41e697c34b1ef9 Author: juga0 juga@riseup.net Date: Tue Feb 2 12:07:03 2021 +0000

minor: scanner: move checking helper to methods

`helper` variable is only used to return error, therefore move it to the methods that create the path and return the error there. `our_nick` is not useful for the log, since it is always the same, but not removing it here. --- sbws/core/scanner.py | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-)

diff --git a/sbws/core/scanner.py b/sbws/core/scanner.py index 4ca7430..e18bddb 100644 --- a/sbws/core/scanner.py +++ b/sbws/core/scanner.py @@ -244,7 +244,7 @@ def _pick_ideal_second_hop(relay, dest, rl, cont, is_exit): return chosen

-def error_no_helper(relay, dest, our_nick): +def error_no_helper(relay, dest, our_nick=""): reason = 'Unable to select a second relay' log.debug(reason + ' to help measure %s (%s)', relay.fingerprint, relay.nickname) @@ -255,25 +255,24 @@ def error_no_helper(relay, dest, our_nick):

def create_path_relay_as_entry(relay, dest, rl, cb): - circ_fps = nicknames = [] helper = _pick_ideal_second_hop( relay, dest, rl, cb.controller, is_exit=True) if not helper: - return error_no_helper(relay, dest, our_nick) + return error_no_helper(relay, dest) circ_fps = [relay.fingerprint, helper.fingerprint] nicknames = [relay.nickname, helper.nickname] return helper, circ_fps, nicknames

def create_path_relay_as_exit(relay, dest, rl, cb): - circ_fps = nicknames = [] helper = _pick_ideal_second_hop( relay, dest, rl, cb.controller, is_exit=False) - if helper: - circ_fps = [helper.fingerprint, relay.fingerprint] - # stored for debugging - nicknames = [helper.nickname, relay.nickname] - return helper, circ_fps, nicknames + if not helper: + return error_no_helper(relay, dest) + circ_fps = [helper.fingerprint, relay.fingerprint] + # stored for debugging + nicknames = [helper.nickname, relay.nickname] + return circ_fps, nicknames

def measure_relay(args, conf, destinations, cb, rl, relay): @@ -324,16 +323,10 @@ def measure_relay(args, conf, destinations, cb, rl, relay):

# Pick a relay to help us measure the given relay. If the given relay is an # exit, then pick a non-exit. Otherwise pick an exit. - helper = None - circ_fps = None if relay.is_exit_not_bad_allowing_port_all_ips(dest.port): - helper, circ_fps, nicknames = create_path_relay_as_exit( - relay, dest, rl, cb) + circ_fps, nicknames = create_path_relay_as_exit(relay, dest, rl, cb) else: - helper, circ_fps, nicknames = create_path_relay_as_entry( - relay, dest, rl, cb) - if not helper: - return error_no_helper(relay, dest, our_nick) + circ_fps, nicknames = create_path_relay_as_entry(relay, dest, rl, cb)

# Build the circuit circ_id, reason = cb.build_circuit(circ_fps)