| C_PARALLEL_SERVER | Parallel Server structure definition |
| Cadapter_t | |
| Caddr_type | Hardware MAC / IP address pair description |
| Carp_list_type | Hardware address cache description |
| Cc5509_timer_type | |
| Cdirentry_type | Embedded File System directory |
| Cdsp_emif_struct | |
| Cdsp_pll_struct | |
| Cechoserv_type | |
| CFTP_client_type | Used for information about current FTP connection |
| Cftp_return_type | FTP server return structure |
| Chttp_con_type | HTTP connection structure |
| Chttpserv_type | Used for information about current connection |
| Cin_struct | Incoming protocol information |
| CNBCtl_t | Network Buffer Control Structure |
| CNBuffer_t | Network Buffer |
| Cout_struct | Outgoing protocol information |
| CPACKET | |
| CSOCKET | Unique description of a bidirectional network communication channel |
| CT_ComDevice | |
| CT_TimeOutTimer | |
| Ctelnet_return_type | Telnet server return structure |
| Ctelnet_server_type | |
| Ctimeval | |
| Cuser_type | User authentication and directory specification |
