Title: android: test_socket fails
Type: behavior Stage: resolved
Components: Tests Versions: Python 3.7
Status: closed Resolution: fixed
Dependencies: 27027 Superseder:
Assigned To: xdegaye Nosy List: Alex.Willmer, python-dev, xdegaye
Priority: normal Keywords: patch

Created on 2016-05-03 15:10 by xdegaye, last changed 2017-03-31 16:36 by dstufft. This issue is now closed.

File name Uploaded Description Edit
null-proto.patch xdegaye, 2016-05-25 14:36 review
test-getaddrinfo.patch xdegaye, 2016-05-25 14:40 review
test_socket.patch xdegaye, 2016-10-30 16:39 review
test_socket_2.patch xdegaye, 2016-11-18 15:48 review
test_socket_3.patch xdegaye, 2016-12-12 15:16 review
Pull Requests
URL Status Linked Edit
PR 552 closed dstufft, 2017-03-31 16:36
Messages (11)
msg264737 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-05-03 15:10
test_socket fails on an android emulator running an x86 system image at API level 21.

ERROR: testGetServBy (test.test_socket.GeneralModuleTests)
Traceback (most recent call last):
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/test/", line 913, in testGetServBy
    port2 = socket.getservbyname(service)
OSError: service/proto not found

ERROR: testGetaddrinfo (test.test_socket.GeneralModuleTests)
Traceback (most recent call last):
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/test/", line 1240, in testGetaddrinfo
    socket.getaddrinfo(HOST, "http")
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/", line 732, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 9] servname not supported for ai_socktype

Ran 530 tests in 26.702s

FAILED (errors=2, skipped=75)
test test_socket failed
1 test failed:
Total duration: 0:00:27
msg265078 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-05-07 16:47
On android getservbyname(const char *NAME, const char *PROTO) returns NULL when PROTO is NULL:

root@generic_x86:/data/local/tmp # python
Python 3.6.0a0 (default:811ccdee6f87+, May  7 2016, 17:56:37) 
[GCC 4.9 20140827 (prerelease)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> socket.getservbyname('daytime', 'tcp')
>>> socket.getservbyname('daytime', 'udp')
>>> socket.getservbyname('daytime')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: service/proto not found

On android socket.getaddrinfo() raises an exception when port is not a number:

>>> socket.getaddrinfo('', 80)
[(<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_DGRAM: 2>, 17, '', ('', 80)), (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('', 80))]
>>> socket.getaddrinfo('', 'http')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/", line 732, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 9] servname not supported for ai_socktype
msg265250 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-05-10 14:52
testGetaddrinfo does not fail anymore on an emulator running an android-23-x86, i.e. Android 6.0 or API 23.
msg266362 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-05-25 14:33
Problems with the socket module on Android:
API 21:
    a) Both getservbyname() and getservbyport() fail when the optional 'protocolname' parameter is not set to 'tcp' or 'udp'.
    b) getservbyname() fails when 'servicename' is set to 'http'.
    getaddrinfo() fails either when:
        c) 'port' is 'http'.
        d) Or the optional 'type' is not set to socket.SOCK_STREAM or socket.SOCK_DGRAM and 'port' is a string.

API 23:
    e) getservbyport() fails when the optional 'protocolname' parameter is not set to 'tcp' or 'udp'.

IMHO case b) and c) are difficult to fix.
For case d), one could use the Python implementation of getaddrinfo, but Android does not have the deprecated getipnodebyaddr(), so it is necessary to disable ipv6 in this case. Not sure if this is worth it.
msg266363 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-05-25 14:36
This patch fixes the testGetServBy test for API 21 and 23 (fixing the cases a) and e) of my previous msg).
msg266365 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-05-25 14:40
This patch fixes the testGetaddrinfo test for API 21 (the test runs fine on API 23):
    The failing statement 'socket.getaddrinfo(HOST, "http")' in testGetaddrinfo does not test explicitly for "http" and for the absence of the optional 'type' parameter.
    When is_android is True, the 'socket.getaddrinfo('', "echo", type=socket.SOCK_DGRAM)' statement is run instead and the test is ok.
msg279730 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-10-30 16:39
This patch simply skips the statements that fail on Android.
msg279773 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-10-31 09:00
Entered on the AOSP issue tracker.
msg281130 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-11-18 15:48
New patch using support.less_than_android_api(level).
msg283009 - (view) Author: Xavier de Gaye (xdegaye) * Date: 2016-12-12 15:16
New patch using sys.getandroidapilevel().
getandroidapilevel() is only available in 3.7, so only 3.7 is being fixed.
msg283084 - (view) Author: Roundup Robot (python-dev) Date: 2016-12-13 08:22
New changeset 95140ff32239 by Xavier de Gaye in branch 'default':
Issue #26936: Fix the test_socket failures on Android - getservbyname(),
Date User Action Args
2017-03-31 16:36:29dstufftsetpull_requests: + pull_request1025
2016-12-13 09:12:57xdegayesetstatus: open -> closed
resolution: fixed
stage: patch review -> resolved
2016-12-13 08:22:44python-devsetnosy: + python-dev
messages: + msg283084
2016-12-12 15:16:10xdegayesetfiles: + test_socket_3.patch

stage: commit review -> patch review
messages: + msg283009
versions: - Python 3.6
2016-11-18 15:48:44xdegayesetfiles: + test_socket_2.patch

messages: + msg281130
stage: patch review -> commit review
2016-10-31 09:00:38xdegayesetmessages: + msg279773
2016-10-30 16:39:47xdegayesetfiles: + test_socket.patch
versions: + Python 3.7
messages: + msg279730

assignee: xdegaye
components: + Tests, - Library (Lib), Cross-Build
stage: patch review
2016-05-25 14:40:43xdegayesetfiles: + test-getaddrinfo.patch

dependencies: + add the 'is_android' attribute to
messages: + msg266365
2016-05-25 14:36:50xdegayesetfiles: + null-proto.patch
keywords: + patch
messages: + msg266363
2016-05-25 14:33:33xdegayesetmessages: + msg266362
2016-05-21 07:06:39xdegayelinkissue26865 dependencies
2016-05-10 14:52:20xdegayesetmessages: + msg265250
2016-05-07 16:47:13xdegayesetmessages: + msg265078
2016-05-03 15:10:46xdegayecreate