A connection is opened using nginx framework and then fed to OpenLDAP using
ldap_init_fd() call with custom SockBuf IO handlers. When some credentials
need to be validated, ngx_http_auth_ldap_authenticate() is called multiple
times, returning NGX_AGAIN each time the process is waiting for the LDAP
server to reply.
(Note: This only an initial implementation and as such, it is of course
very buggy and limited. Further work is needed to make it useful.)
Samuel Huang
Tomáš Golembiovský
Jiri Hruska
Valery Komarov