| C_ADAPTER | Describes an opened network adapter |
| C_PACKET | Structure that contains a group of packets coming from the driver |
| C_PACKET_OID_DATA | Structure containing an OID request |
| C_pcap_bluetooth_h4_header | |
| C_usb_header | |
| C_usb_setup | |
| Cbfin_emac_regs | |
| Cbpf_hdr | Packet header |
| Cbpf_insn | A single BPF pseudo-instruction |
| Cbpf_program | A BPF pseudo-assembly program |
| Cbpf_stat | Structure that contains a couple of statistics values on the current capture |
| Cbpf_version | |
| Cdump_bpf_hdr | Dump packet header |
| Cec_adapter | |
| Cec_ALstatuscodelist_t | |
| Cec_configlist_t | |
| Cec_eepromFMMUt | |
| Cec_eepromPDOt | |
| Cec_eepromSMt | |
| Cec_eringt | |
| Cec_errort | |
| Cec_groupt | |
| Cec_idxstackT | |
| Cec_mbxerrorlist_t | |
| Cec_ODlistt | |
| Cec_OElistt | |
| Cec_sdoerrorlist_t | |
| Cec_slavet | |
| Cec_soeerrorlist_t | |
| Cec_stackT | |
| Cec_timet | |
| Cecx_contextt | |
| Cecx_portt | |
| Cecx_redportt | |
| Cethernet_data | |
| Cimaxdiv_t | |
| Cin_EL1008_t | |
| Cin_EL3061_t | |
| CNetType | Network type structure |
| Cnpf_if_addr | Addresses of a network adapter |
| Cosal_timer | |
| Cout_EL2622_t | |
| Cout_EL4001_t | |
| CPACKED | |
| Cpcap_addr | |
| Cpcap_etherent | |
| Cpcap_file_header | |
| Cpcap_if | |
| Cpcap_pkthdr | |
| Cpcap_rmtauth | This structure keeps the information needed to autheticate the user on a remote machine |
| Cpcap_samp | This structure defines the information related to sampling |
| Cpcap_send_queue | A queue of raw packets that will be sent to the network with pcap_sendqueue_transmit() |
| Cpcap_stat | |
| Csll_header | |
| Cvlan_tag |