[asterisk-bugs] [JIRA] (ASTERISK-23913) [patch]When using FEC error correction, asterisk tries considers negative sequence numbers as missing

[Rusty Newton (JIRA)]

Rusty Newton created ASTERISK-23913:
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             Summary: [patch]When using FEC error correction, asterisk tries considers negative sequence numbers as missing
                 Key: ASTERISK-23913
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23913
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Core/UDPTL
    Affects Versions: 11.10.1
            Reporter: Torrey Searle


When using FEC error correction with span=3 and entries=4 asterisk will try to repair in packet with sequence number 5 because it will see that packet -4 is missing.  The result is that Asterisk will forward garbage packets that can possibly kill the fax.

Attatched is an example pcap showing this issue and a patch to resolve this issue



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