These are internals to that module, I'm afraid we don't have any good documentation for the inner workings of individual modules beyond the source code itself. I think in most cases, that is used to indicate that we already have an SDP. Mike On Apr 8, 2014, at 7:00 AM, 张顺通 <shuntongzhang@gmail.com> wrote:

I am reading freeswitch code,there are a lot of flags,like: sofia_test_flag(tech_pvt, TFLAG_SDP) my question is : how can I know the meaning of TFLAG_SDP, is there anything similar to man manual? In this manual I can search the meaning of flag TFLAG_SDP.