Restrict kmp string search to first 128 bytes #105
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TCXB8-3707: Parental Controls blocks false positives
Reason for change: Parental control block on access with certain keywords cause false positives. User intended to block websites like matchweed.com, catchherb.co with keyword "thc", "bc". Along with these, any url with substring "thc" also gets blocked.
Change: Keyword search is done on the full string with kmp algorithm. Since no limit is mentioned, the default of 65535 is considered as upper limit of packet payload size for kmp algorithm search. This is restricted to have an upper limit of upto 128 bytes for keyword search.
Recommendation to user: Avoid very short generic query keywords for blocking
Test Procedure: Validate IPTV playback
Priority: P1
Risks: None