This is normal because the switch from clear to secure can happen quickly on one end or the other and you'll have a few packets that get thru before one end is ready... nothing to be worried about. /b On May 29, 2009, at 5:02 AM, Jason White wrote:
After ZRTP negotiation is complete (the ZRTP state machine has entered the "secure" state), I get a number of lines in the log as follows (FreeSWITCH rev. 13501):
2009-05-29 16:43:19 [DEBUG] switch_rtp.c:538 zrtp_logger() [zrtp protoco]: ERROR! Decrypt failed. ID=14:DH s=SRTP authentication failure (RTP size=172 ssrc=2760088424 seq=53043/53043 pt=9)
They all have a time stamp of shortly after the end of the protocol negotiation.
Is this normal, or a sign of trouble?
The call itself is fine, and ZRTP does not leave the secure state until the end of the call: 2009-05-29 16:43:30 [DEBUG] switch_rtp.c:538 zrtp_logger() [ zrtp engine]: STOP STREAM ID=14 mode=DH state=SECURE.
Are others seeing similar behaviour?
Brian West brian@freeswitch.org -- Meet us at ClueCon! http://www.cluecon.com