Change in titan.TestPorts.AF_PACKET[master]: guard against race between socket(AF_PACKET) and bind()

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laforge gerrit-no-reply at lists.osmocom.org
Thu Dec 10 20:55:17 UTC 2020


laforge has uploaded a new patch set (#2). ( https://gerrit.osmocom.org/c/titan.TestPorts.AF_PACKET/+/21664 )

Change subject: guard against race between socket(AF_PACKET) and bind()
......................................................................

guard against race between socket(AF_PACKET) and bind()

An AF_PACKET socket will immediately receive packets of _all_ interfaces
until it is bound to one specific interface.  This introduces a race
condition between the socket() and the bind() syscall.

Let's use the ifindex passed for each packet in recvmsg() to drop
any packets received for other interfaces.

Change-Id: Icd0b23eb1d6f75ca3a05e5dd1a569fa389903fdf
---
M src/AF_PACKET_PT.cc
1 file changed, 10 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.osmocom.org:29418/titan.TestPorts.AF_PACKET refs/changes/64/21664/2
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Gerrit-Project: titan.TestPorts.AF_PACKET
Gerrit-Branch: master
Gerrit-Change-Id: Icd0b23eb1d6f75ca3a05e5dd1a569fa389903fdf
Gerrit-Change-Number: 21664
Gerrit-PatchSet: 2
Gerrit-Owner: laforge <laforge at osmocom.org>
Gerrit-MessageType: newpatchset
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