Send IuUP Initialization. Expecting direct tx_msg() of the Initialization Ack
 -PDU-> [IuUP]
8060dc5219495e3f00010111e000df99160051673c01270000820000001710000100
tx_msg() invoked by iuup_cn!
 <-PDU- [IuUP]
8060dc5219495e3f00010111e4002400
node_priv=0x2342
ok: matches expected msg
rc=0

Receive payload encapsulated in IuUP. Expecting rx_payload() of just RTP packet
i.e. should strip away 0100e2b3
 -PDU-> [IuUP]
8060944c6256042c000101020100e2b36cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
rx_payload() invoked by iuup_cn!
        [IuUP] -RTP->
8060944c6256042c00010102f03c6cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
node_priv=0x2342
ok: matches expected msg
rc=0

Transmit RTP. Expecting tx_msg() with inserted IuUP header
        [IuUP] <-RTP-
8060944c6256042c00010102f03c6cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
tx_msg() invoked by iuup_cn!
 <-PDU- [IuUP]
8060944c6256042c00010102000002b36cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
node_priv=0x2342
ok: matches expected msg
rc=0

More RTP, each time the Frame Nr advances, causing a new header CRC.
        [IuUP] <-RTP-
8060944c6256042c00010102f03c6cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
tx_msg() invoked by iuup_cn!
 <-PDU- [IuUP]
8060944c6256042c000101020100e2b36cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
node_priv=0x2342
ok: matches expected msg
rc=0
        [IuUP] <-RTP-
8060944c6256042c00010102f03c6cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
tx_msg() invoked by iuup_cn!
 <-PDU- [IuUP]
8060944c6256042c0001010202007eb36cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
node_priv=0x2342
ok: matches expected msg
rc=0
        [IuUP] <-RTP-
8060944c6256042c00010102f03c6cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
tx_msg() invoked by iuup_cn!
 <-PDU- [IuUP]
8060944c6256042c0001010203009eb36cfb23bc46d18180c3e5ffe040045600005a7d35b625b80005fff03214ced0
node_priv=0x2342
ok: matches expected msg
rc=0
All done.