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gnrc_udp: add missing duplitation step #5749

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Merged
merged 1 commit into from
Aug 30, 2016
Merged

gnrc_udp: add missing duplitation step #5749

merged 1 commit into from
Aug 30, 2016

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miri64
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@miri64 miri64 commented Aug 15, 2016

At the moment UDP is duplicating the UDP header wrong, in case pkt->users > 1.

Current behavior:

orig dup
==== ====
IPv6 IPv6
  | /
 UDP UDP
  | /
payload

With this fix:

orig dup
==== ====
IPv6 IPv6
  |    |
 UDP UDP
  | /
payload

The previous behavior leads to the original UDP header to be removed from the packet buffer too early (and subsequently resulting in a crash), because its users counter is one less than expected, while the dangling UDP header never gets removed.

@miri64 miri64 added Type: bug The issue reports a bug / The PR fixes a bug (including spelling errors) GNRC labels Aug 15, 2016
This was referenced Aug 15, 2016
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miri64 added a commit to miri64/RIOT that referenced this pull request Aug 22, 2016
@miri64
Merge branch 'gnrc_udp/fix/missing-duplication' (RIOT-OS#5749) into HEAD
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miri64 added a commit to miri64/RIOT that referenced this pull request Aug 25, 2016
@miri64
Merge branch 'gnrc_udp/fix/missing-duplication' (RIOT-OS#5749) into HEAD
0030896
miri64 added a commit to miri64/RIOT that referenced this pull request Aug 26, 2016
@miri64
Merge branch 'gnrc_udp/fix/missing-duplication' (RIOT-OS#5749) into HEAD
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@miri64 miri64 mentioned this pull request Aug 26, 2016
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miri64 added a commit to miri64/RIOT that referenced this pull request Aug 26, 2016
@miri64
Merge branch 'gnrc_udp/fix/missing-duplication' (RIOT-OS#5749) into HEAD
2dcea9e
@miri64 miri64 added the Community: Hack'n'ACK candidate This PR is a candidate for review and discussion during one of RIOT's monthly Hack'n'ACK parties label Aug 30, 2016
@smlng
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smlng commented Aug 30, 2016

Looks fine to me, ACK from my side. @kYc0o any objections?

@miri64 miri64 added the CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR label Aug 30, 2016
@miri64 miri64 merged commit 9ba68cc into RIOT-OS:master Aug 30, 2016
@miri64 miri64 deleted the gnrc_udp/fix/missing-duplication branch August 30, 2016 20:35
@kYc0o
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kYc0o commented Aug 30, 2016

Everything was Ok. Sorry for the delay.

@OlegHahm
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Nice catch!

@OlegHahm OlegHahm added this to the Release 2016.10 milestone Aug 31, 2016
@miri64 miri64 added Platform: MSP Platform: This PR/issue effects MSP-based platforms Area: network Area: Networking labels Sep 30, 2018
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Area: network Area: Networking CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR Community: Hack'n'ACK candidate This PR is a candidate for review and discussion during one of RIOT's monthly Hack'n'ACK parties Platform: MSP Platform: This PR/issue effects MSP-based platforms Type: bug The issue reports a bug / The PR fixes a bug (including spelling errors)
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