Here are the data structures with brief descriptions:

C__time_t_must_be_integral
C_getopt_data
Cconf_t	Runtime configuration state
Cexpl	A structure that travels through mustach via closure void pointer
Ciovec
Cipaddr_t	Memory space for a binary IP address saving
Cleases_t	An individual lease
Cmemory_double
Cmsghdr
Cmustach_itf	Mustach_itf - interface for callbacks
Coption
Coutput_helper_t	Various per range and shared net temporary calculation results
Coutput_sort	Linked list of sort functions
Cquoting_options
Crange_t	Counters for an individual range
Crpl_max_align_t
Cshared_network_t	Counters for an individual shared network
Cslotvec
Csockaddr_storage
Ctimespec
Ctm_zone