Here are the data structures with brief descriptions:

Csrtp_auth_t
Csrtp_auth_test_case_t
Csrtp_auth_type_t
Csrtp_cipher_t
Csrtp_cipher_test_case_t
Csrtp_cipher_type_t
Csrtp_crypto_policy_t	Srtp_crypto_policy_t describes a particular crypto policy that can be applied to an SRTP stream
Csrtp_debug_module_t
Csrtp_event_data_t	Srtp_event_data_t is the structure passed as a callback to the event handler function
Csrtp_master_key_t	Srtp_master_key_t represents a master key. There will be a Master Key Index and the Master Key associated with the Master Key Index. Need to also keep track of the Master Key Index Size to correctly read it from a packet
Csrtp_policy_t	Policy for an SRTP session
Csrtp_ssrc_t	An srtp_ssrc_t represents a particular SSRC value, or a `wildcard' SSRC