Here are the data structures with brief descriptions:

_bsd_accept_return_t
_bsd_gethostbyname_return_t
_bsd_getsockopt_return_t
_bsd_read_return_t
_bsd_select_return_t
_in_addr_t
_netapp_dhcp_ret_args_t
_netapp_ipconfig_ret_args_t
_netapp_pingreport_args
_sockaddr_in_t
_sockaddr_t
fd_set
sSimplLinkInformation
timeval