237 lines
8.1 KiB
C
237 lines
8.1 KiB
C
#ifndef __CAPWAP_RFC_HEADER__
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#define __CAPWAP_RFC_HEADER__
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#include <inttypes.h>
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#ifndef STRUCT_PACKED
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#define STRUCT_PACKED __attribute__((__packed__))
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#endif
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#define CAPWAP_PROTOCOL_VERSION 0
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#define CAPWAP_MTU_DEFAULT 1400
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#define CAPWAP_DONT_FRAGMENT 0
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/* Capwap preamble */
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#define CAPWAP_PREAMBLE_HEADER 0
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#define CAPWAP_PREAMBLE_DTLS_HEADER 1
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struct capwap_preamble {
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#ifdef CAPWAP_BIG_ENDIAN
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uint8_t version : 4;
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uint8_t type : 4;
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#else
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uint8_t type : 4;
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uint8_t version : 4;
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#endif
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} STRUCT_PACKED;
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/* Capwap DTLS header */
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struct capwap_dtls_header {
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struct capwap_preamble preamble;
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uint8_t reserved1;
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uint8_t reserved2;
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uint8_t reserved3;
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} STRUCT_PACKED;
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/* Capwap header: 8 (header) + 12 (radio mac) + 256 (wireless info) */
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#define CAPWAP_HEADER_MAX_SIZE 276
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struct capwap_header {
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struct capwap_preamble preamble;
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#ifdef CAPWAP_BIG_ENDIAN
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uint16_t hlen : 5;
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uint16_t rid : 5;
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uint16_t wbid : 5;
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uint16_t flag_t : 1;
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uint8_t flag_f : 1;
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uint8_t flag_l : 1;
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uint8_t flag_w : 1;
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uint8_t flag_m : 1;
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uint8_t flag_k : 1;
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uint8_t flag_res : 3;
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#else
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uint16_t _rid_hi : 3;
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uint16_t hlen : 5;
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uint16_t flag_t : 1;
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uint16_t wbid : 5;
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uint16_t _rid_lo : 2;
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uint8_t flag_res : 3;
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uint8_t flag_k : 1;
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uint8_t flag_m : 1;
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uint8_t flag_w : 1;
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uint8_t flag_l : 1;
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uint8_t flag_f : 1;
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#endif
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uint16_t frag_id;
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uint16_t frag_off; /* Only first 13 bit */
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} STRUCT_PACKED;
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#define FRAGMENT_OFFSET_MASK 0xfff8
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/* Mac Address */
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struct capwap_mac_address {
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uint8_t length;
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uint8_t address[0];
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} STRUCT_PACKED;
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/* Wireless Information */
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struct capwap_wireless_information {
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uint8_t length;
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uint8_t data[0];
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} STRUCT_PACKED;
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/* IEEE802.11 Wireless Information */
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struct capwap_ieee80211_frame_info {
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uint8_t rssi;
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uint8_t snr;
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uint16_t rate;
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} STRUCT_PACKED;
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/* Message element */
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struct capwap_message_element {
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uint16_t type;
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uint16_t length;
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uint8_t data[0];
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} STRUCT_PACKED;
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/* Control Message Type */
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#define CAPWAP_FIRST_MESSAGE_TYPE 1
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#define CAPWAP_DISCOVERY_REQUEST 1
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#define CAPWAP_DISCOVERY_RESPONSE 2
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#define CAPWAP_JOIN_REQUEST 3
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#define CAPWAP_JOIN_RESPONSE 4
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#define CAPWAP_CONFIGURATION_STATUS_REQUEST 5
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#define CAPWAP_CONFIGURATION_STATUS_RESPONSE 6
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#define CAPWAP_CONFIGURATION_UPDATE_REQUEST 7
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#define CAPWAP_CONFIGURATION_UPDATE_RESPONSE 8
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#define CAPWAP_WTP_EVENT_REQUEST 9
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#define CAPWAP_WTP_EVENT_RESPONSE 10
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#define CAPWAP_CHANGE_STATE_EVENT_REQUEST 11
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#define CAPWAP_CHANGE_STATE_EVENT_RESPONSE 12
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#define CAPWAP_ECHO_REQUEST 13
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#define CAPWAP_ECHO_RESPONSE 14
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#define CAPWAP_IMAGE_DATA_REQUEST 15
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#define CAPWAP_IMAGE_DATA_RESPONSE 16
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#define CAPWAP_RESET_REQUEST 17
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#define CAPWAP_RESET_RESPONSE 18
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#define CAPWAP_PRIMARY_DISCOVERY_REQUEST 19
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#define CAPWAP_PRIMARY_DISCOVERY_RESPONSE 20
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#define CAPWAP_DATA_TRANSFER_REQUEST 21
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#define CAPWAP_DATA_TRANSFER_RESPONSE 22
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#define CAPWAP_CLEAR_CONFIGURATION_REQUEST 23
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#define CAPWAP_CLEAR_CONFIGURATION_RESPONSE 24
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#define CAPWAP_STATION_CONFIGURATION_REQUEST 25
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#define CAPWAP_STATION_CONFIGURATION_RESPONSE 26
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#define CAPWAP_LAST_MESSAGE_TYPE 26
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#define CAPWAP_VALID_MESSAGE_TYPE(x) (((x) >= CAPWAP_FIRST_MESSAGE_TYPE) && ((x) <= CAPWAP_LAST_MESSAGE_TYPE))
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#define CAPWAP_IEEE80211_FIRST_MESSAGE_TYPE 3398913
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#define CAPWAP_IEEE80211_WLAN_CONFIGURATION_REQUEST 3398913
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#define CAPWAP_IEEE80211_WLAN_CONFIGURATION_RESPONSE 3398914
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#define CAPWAP_IEEE80211_LAST_MESSAGE_TYPE 3398914
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#define CAPWAP_VALID_IEEE80211_MESSAGE_TYPE(x) (((x) >= CAPWAP_IEEE80211_FIRST_MESSAGE_TYPE) && ((x) <= CAPWAP_IEEE80211_LAST_MESSAGE_TYPE))
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/* Control Message */
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#define CAPWAP_CONTROL_MESSAGE_MIN_LENGTH 3
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struct capwap_control_message {
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uint32_t type;
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uint8_t seq;
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uint16_t length;
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uint8_t flags;
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uint8_t elements[0];
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} STRUCT_PACKED;
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/* Data Message Keep-Alive*/
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#define CAPWAP_DATA_MESSAGE_KEEPALIVE_MIN_LENGTH 2
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struct capwap_data_message {
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uint16_t length;
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uint8_t elements[0];
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} STRUCT_PACKED;
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/* Capwap dtls header helper */
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#define GET_DTLS_BODY(x) (void*)(((uint8_t*)(x)) + sizeof(struct capwap_dtls_header))
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/* Capwap header helper */
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#define GET_VERSION_HEADER(x) ((x)->preamble.version)
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#define SET_VERSION_HEADER(x, y) ((x)->preamble.version = (uint8_t)(y))
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#define GET_TYPE_HEADER(x) ((x)->preamble.type)
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#define SET_TYPE_HEADER(x, y) ((x)->preamble.type = (uint8_t)(y))
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#define GET_HLEN_HEADER(x) ((x)->hlen)
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#define SET_HLEN_HEADER(x, y) ((x)->hlen = (uint16_t)(y))
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#ifdef CAPWAP_BIG_ENDIAN
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#define GET_RID_HEADER(x) ((uint8_t)((x)->rid))
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#define SET_RID_HEADER(x, y) ((x)->rid = (uint16_t)(y))
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#else
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#define GET_RID_HEADER(x) ((uint8_t)((uint16_t)((x)->_rid_hi << 2 | (x)->_rid_lo)))
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#define SET_RID_HEADER(x, y) ({ (x)->_rid_hi = (uint16_t)((y) >> 2); (x)->_rid_lo = (uint16_t)((y) & 0x0003); })
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#endif
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#define GET_WBID_HEADER(x) ((x)->wbid)
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#define SET_WBID_HEADER(x, y) ((x)->wbid = (uint16_t)(y))
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#define IS_FLAG_T_HEADER(x) ((x)->flag_t)
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#define SET_FLAG_T_HEADER(x, y) ((x)->flag_t = ((y) ? 1 : 0))
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#define IS_FLAG_F_HEADER(x) ((x)->flag_f)
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#define SET_FLAG_F_HEADER(x, y) ((x)->flag_f = ((y) ? 1 : 0))
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#define IS_FLAG_L_HEADER(x) ((x)->flag_l)
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#define SET_FLAG_L_HEADER(x, y) ((x)->flag_l = ((y) ? 1 : 0))
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#define IS_FLAG_W_HEADER(x) ((x)->flag_w)
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#define SET_FLAG_W_HEADER(x, y) ((x)->flag_w = ((y) ? 1 : 0))
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#define IS_FLAG_M_HEADER(x) ((x)->flag_m)
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#define SET_FLAG_M_HEADER(x, y) ((x)->flag_m = ((y) ? 1 : 0))
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#define IS_FLAG_K_HEADER(x) ((x)->flag_k)
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#define SET_FLAG_K_HEADER(x, y) ((x)->flag_k = ((y) ? 1 : 0))
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#define GET_FRAGMENT_ID_HEADER(x) (ntohs((x)->frag_id))
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#define SET_FRAGMENT_ID_HEADER(x, y) ((x)->frag_id = htons((uint16_t)(y)))
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#define GET_FRAGMENT_OFFSET_HEADER(x) (ntohs((x)->frag_off) & FRAGMENT_OFFSET_MASK)
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#define SET_FRAGMENT_OFFSET_HEADER(x, y) ((x)->frag_off &= ~FRAGMENT_OFFSET_MASK, (x)->frag_off |= htons((uint16_t)(y) & FRAGMENT_OFFSET_MASK))
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#define GET_RADIO_MAC_ADDRESS_STRUCT(x) ((struct capwap_mac_address*)(((uint8_t*)(x)) + sizeof(struct capwap_header)))
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#define GET_WIRELESS_INFORMATION_STRUCT(x) ((struct capwap_wireless_information*)(((uint8_t*)(x)) + sizeof(struct capwap_header) + (IS_FLAG_M_HEADER(x) ? (((GET_RADIO_MAC_ADDRESS_STRUCT(x)->length + sizeof(struct capwap_mac_address)) + 3) / 4) * 4 : 0)))
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#define GET_PAYLOAD_HEADER(x) ((void*)(((uint8_t*)(x)) + GET_HLEN_HEADER(x) * 4))
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#define IS_SEQUENCE_SMALLER(s1, s2) (((((s1) < (s2)) && (((s2) - (s1)) < 128)) || (((s1) > (s2)) && (((s1) - (s2)) > 128))) ? 1 : 0)
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/* */
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#define MACADDRESS_NONE_LENGTH 0
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/* */
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#define MACADDRESS_EUI48_LENGTH 6
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struct capwap_macaddress_eui48 {
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uint8_t macaddress[MACADDRESS_EUI48_LENGTH];
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} STRUCT_PACKED;
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/* */
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#define MACADDRESS_EUI64_LENGTH 8
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struct capwap_macaddress_eui64 {
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uint8_t macaddress[MACADDRESS_EUI64_LENGTH];
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} STRUCT_PACKED;
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#define IS_VALID_MACADDRESS_LENGTH(x) ((x == MACADDRESS_EUI48_LENGTH) || (x == MACADDRESS_EUI64_LENGTH))
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#define RADIOID_MAX_COUNT 31
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#define IS_VALID_RADIOID(x) ((x >= 1) && (x <= RADIOID_MAX_COUNT))
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#define WLANID_MAX_COUNT 16
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#define IS_VALID_WLANID(x) ((x >= 1) && (x <= WLANID_MAX_COUNT))
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/* Standard message elements 1 -> 52 (1 - 1023) */
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#define CAPWAP_MESSAGE_ELEMENTS_START 1
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#define CAPWAP_MESSAGE_ELEMENTS_STOP 53
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#define CAPWAP_MESSAGE_ELEMENTS_COUNT ((CAPWAP_MESSAGE_ELEMENTS_STOP - CAPWAP_MESSAGE_ELEMENTS_START) + 1)
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#define IS_MESSAGE_ELEMENTS(x) ((((x).vendor == 0) && ((x).type >= CAPWAP_MESSAGE_ELEMENTS_START) && ((x).type <= CAPWAP_MESSAGE_ELEMENTS_STOP)) ? 1 : 0)
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/* 802.11 message elements 1024 -> 1024 (1024 - 2047) */
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#define CAPWAP_80211_MESSAGE_ELEMENTS_START 1024
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#define CAPWAP_80211_MESSAGE_ELEMENTS_STOP 1048
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#define CAPWAP_80211_MESSAGE_ELEMENTS_COUNT ((CAPWAP_80211_MESSAGE_ELEMENTS_STOP - CAPWAP_80211_MESSAGE_ELEMENTS_START) + 1)
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#define IS_80211_MESSAGE_ELEMENTS(x) ((((x).vendor == 0) && ((x).type >= CAPWAP_80211_MESSAGE_ELEMENTS_START) && ((x).type <= CAPWAP_80211_MESSAGE_ELEMENTS_STOP)) ? 1 : 0)
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/* */
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#define IS_VALID_MESSAGE_ELEMENTS(x) (IS_MESSAGE_ELEMENTS(x) || IS_80211_MESSAGE_ELEMENTS(x))
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#endif /* __CAPWAP_RFC_HEADER__ */
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