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res_rtp_asterisk.c: Add "seqno" strictrtp option

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When networks experience disruptions, there can be large gaps of time
between receiving packets. When strictrtp is enabled, this created
issues where a flood of packets could come in and be seen as an attack.
Another option - seqno - has been added to the strictrtp option that
ignores the time interval and goes strictly by sequence number for
validity.

Change-Id: I8a42b8d193673899c8fc22fe7f98ea87df89be71
This commit is contained in:
Ben Ford
2018-09-10 11:28:09 -05:00
committed by Benjamin Keith Ford
parent aa10d6d5eb
commit b11a6643cf
3 changed files with 65 additions and 23 deletions
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4
configs/samples/rtp.conf.sample
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@@ -31,6 +31,10 @@ rtpend=20000
; seconds after starting learning mode. Once learning mode completes the
; current stream is locked in and cannot change until the next
; renegotiation.
; Valid options are "no" to disable strictrtp, "yes" to enable strictrtp,
; and "seqno", which does the same thing as strictrtp=yes, but only checks
; to make sure the sequence number is correct rather than checking the time
; interval as well.
; This option is enabled by default.
; strictrtp=yes
;