Here are the data structures with brief descriptions:

_libopm_list
_libopm_node
_OPM
_OPM_CALLBACK
_OPM_CONFIG
_opm_config_hash
_OPM_CONNECTION
_opm_inaddr
_OPM_PROTOCOL
_OPM_PROTOCOL_CONFIG
_OPM_REMOTE
_OPM_SCAN
_opm_sockaddr