Hi, I have extensive C experience. I checked the link provide and with the information given, I am confident I can solve you problem. The link talks about MSSRTP, your problem is still vague though. Are you trying to modify skype or do you have an application that behaves like skype or do you need a software to intercept/read/record skype traffic?
Relevant Skills and Experience
C/Cryptography/Software Development
Proposed Milestones
₹140000 INR - Completion