Here are the data structures with brief descriptions:

Czrtp_callback_event_t	Callbacks definitions
Czrtp_callback_misc_t	Miscellaneous Functions
Czrtp_callback_scheduler_t	Delay Calls callbacks
Czrtp_callback_t	ZRTP feedback interface and application dependent routine
Czrtp_config_t	ZRTP global configuration options
Czrtp_profile_t	ZRTP session profileZRTP Sessions are configured with a profile scheme. Each profile is defined by a structure of the given type. zrtp_profile_t contains a set of preferences for crypto components and other protocol parameters
Czrtp_retry_task_t	Delay Call wrapper
Czrtp_session_info_t	Zrtp session information structurelibzrtp, since v0.80 takes data incapsulating approach and hides all private date inside zrtp_session_t structure. Developers shouldn't access them directly. zrtp_session_get() should be used instead to fill zrtp_session_info_t structure. zrtp_session_info_t contains all needed information in safe and easy to use form
Czrtp_stream_info_t	Zrtp stream information structurelibzrtp, since v0.80 takes data encapsulating approach and hides all private data inside zrtp_stream_t structure. Developers shouldn't access them directly. zrtp_stream_get() should be used instead to fill zrtp_stream_info_t structure. zrtp_stream_info_t contains all needed information in safe and easy to use form
Czrtp_string1024
Czrtp_string128
Czrtp_string16
Czrtp_string256
Czrtp_string32
Czrtp_string64
Czrtp_string8
Czrtp_stringn