[Pkg-netmeasure-discuss] Bug#930481: python-pypcap: block/noblocking broken

Anton Ivanov anton.ivanov at kot-begemot.co.uk
Thu Jun 13 15:11:36 BST 2019


Package: python-pypcap
Version: 1.2.2-1
Severity: important

Dear Maintainer,

Setting of block/nonblock in the pyppcap variant of working with pcap from
python is completely broken

To test - 

set iface and FILTER for capture spec

p = pcap.pcap(iface.encode('ascii'), MAXPACKET, True, 1)
p.setfilter(FILTER)
p.setnonblock(True)

If there are no packets, it a p.next() or calling p in an iter
context should immediately return a None.
Instead of that it sits there and waits.

This makes the package unusable for all but the very simple blocking
use cases

-- System Information:
Debian Release: 10.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-5-amd64 (SMP w/12 CPU cores)
Kernel taint flags: TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages python-pypcap depends on:
ii  libc6       2.28-10
ii  libpcap0.8  1.8.1-6
ii  python      2.7.16-1

python-pypcap recommends no packages.

python-pypcap suggests no packages.

-- no debconf information



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