commit 2ee4e95ab0f2640674c1074ce26e2f09ce9bdf26 Author: Damian Johnson atagar@torproject.org Date: Sat Dec 6 16:45:24 2014 -0800

Unable to call socket.gethostbyname() when disconnected

A Gentoo ticket notes an interesting stacktrace...

https://bugs.gentoo.org/show_bug.cgi?id=527072

====================================================================== ERROR: test_all_private_policy ---------------------------------------------------------------------- Traceback (most recent call last): File "/tmp/portage/net-libs/stem-1.2.2_p20141018/work/stem-1.2.2_p20141018/test/unit/exit_policy/policy.py", line 115, in test_all_private_policy private_policy = get_config_policy('reject private:%s' % port) File "/tmp/portage/net-libs/stem-1.2.2_p20141018/work/stem-1.2.2_p20141018/stem/exit_policy.py", line 141, in get_config_policy ip_address = socket.gethostbyname(socket.gethostname()) gaierror: [Errno -3] Temporary failure in name resolution ======================================================================

I wasn't able to repro this by simply disconnecting, but oh well. Easy enough to suppress the exception. --- stem/exit_policy.py | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/stem/exit_policy.py b/stem/exit_policy.py index 0b7bea7..9bc8ccb 100644 --- a/stem/exit_policy.py +++ b/stem/exit_policy.py @@ -136,11 +136,17 @@ def get_config_policy(rules, ip_address = None): if 'private' in rule: acceptance = rule.split(' ', 1)[0] port = rule.split(':', 1)[1] + addresses = list(PRIVATE_ADDRESSES)

- if ip_address is None: - ip_address = socket.gethostbyname(socket.gethostname()) + if ip_address: + addresses.append(ip_address) + else: + try: + addresses.append(socket.gethostbyname(socket.gethostname())) + except: + pass # we might not have a network connection

- for private_addr in PRIVATE_ADDRESSES + (ip_address,): + for private_addr in addresses: result.append(ExitPolicyRule("%s %s:%s" % (acceptance, private_addr, port))) else: result.append(ExitPolicyRule(rule))