Here are the data structures with brief descriptions:

C_BuddyAddress
C_BuddyInfo
C_BuddyLookupFuncs
C_BuddyLookupRequest
C_LinphoneCoreVTable	This structure holds all callbacks that the application should implement
C_LinphoneDialPlan
C_LinphoneRtpTransportFactories
C_LinphoneSipTransports	Linphone core SIP transport ports
C_LinphoneVideoPolicy	Structure describing policy regarding video streams establishments
C_SipSetup
C_SipSetupContext
CLinphoneVideoSizeDef
CMyAppData