FindPptpInByPeerCallId
FindPptpInByPeerCallId(struct libalias *la, struct in_addr _dst_addr,
pptp_lnk = FindPptpInByPeerCallId(la, GetDestAddress(lnk),
lnk = FindPptpInByPeerCallId(la, pip->ip_src, pip->ip_dst, gr->gh_call_id);