I'm not sure if I correctly understood the description of functions isbflagset and isbflagset so once again I'm asking for help :)

Here is what I do:

1. Asterisk sends INVITE to Kamailio. Kamailio performs lookup of available contacts and then few checks in branch_route. I'm adding setbflag("17", $T_branch_idx); there.

2. Later in route[NATMANAGE] I added if (isbflagset("17", $T_branch_idx)) { and additional logic. isbflagset results in true (for same INVITE).

3. Finally one of UACs responds with 200 OK. Asterisk generates ACK packet that gets in route[NATMANAGE]. isbflagset results in false.

So my question is: shouldn't isbflagset be true for ACK too since it's the same branch or I interpreted these fenctions incorrectly?

Thanks a lot!