Opened 20 years ago

Closed 20 years ago

#1062 closed patch (fixed)

CRC-errors when handling PAT/PMT-tables.

Reported by: jyrki.n@… Owned by: danielk
Priority: minor Milestone: unknown
Component: mythtv Version: head
Severity: medium Keywords:
Cc: Ticket locked: no

Description

If PMT-data section length exceeds TS-packet size with less than 5 bytes, the TS-packet will be handled as a complete PMT-table and generate CRC-error.

Attachments (2)

patch-pmt-partial.diff​ (622 bytes ) - added by jyrki.n@… 20 years ago.
Patch for PAT/PMT tables
problem-pmt.log​ (5.3 KB ) - added by jyrki.n@… 20 years ago.
Here is a dvbsnoop of TS-packets with PMT-tables. These packets will generate CRC-errors in current myth.

Download all attachments as: .zip

Change History (5)

by jyrki.n@…, 20 years ago

Attachment: patch-pmt-partial.diff​ added

Patch for PAT/PMT tables

comment:1 by danielk, 20 years ago

Milestone: 0.19 → unknown
Priority: major → minor

Shouldn't you check if the table has a CRC before adding 4 to the length?

comment:2 by jyrki.n@…, 20 years ago

Those 4 bytes are for pointerfield,table id and section length. CRC bytes are included in section length.

by jyrki.n@…, 20 years ago

Attachment: problem-pmt.log​ added

Here is a dvbsnoop of TS-packets with PMT-tables. These packets will generate CRC-errors in current myth.

comment:3 by danielk, 20 years ago

Resolution: → fixed
Status: new → closed

(In [8654]) Fixes #1062, by applying modified patch. Thanks jyrki.

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