HMR to change a=sendonly when connection c != 0.0.0.0

Hi Fellows,

I hope you are ok.

I would like you can help me with the following HMR and validate if I can do a replacement based on 2 values on the SDP, but one of the values belongs to the session-part and the other one to the media-part.

What I am trying to do is the following:

If c is different from 0.0.0.0 (any IP address values) 

and 

a=sendonly is present , then I want to replaace a=sendonly to a=sendrecv

v=0

o=- 2704667834 2519592692 IN IP4 10.255.0.0

s=-

c=IN IP4 10.255.0.0

t=0 0

m=audio 40796 RTP/AVP 0 8 102

a=rtpmap:8 PCMA/8000

a=rtpmap:0 PCMU/8000