diff options
Diffstat (limited to 'src/transport/plugin_transport_wlan.h')
| -rw-r--r-- | src/transport/plugin_transport_wlan.h | 167 |
1 files changed, 137 insertions, 30 deletions
diff --git a/src/transport/plugin_transport_wlan.h b/src/transport/plugin_transport_wlan.h index 9e1bc4f..2b70fc0 100644 --- a/src/transport/plugin_transport_wlan.h +++ b/src/transport/plugin_transport_wlan.h @@ -34,7 +34,27 @@ */ #define MAC_ADDR_SIZE 6 +/** + * Value for "Management" in the 'frame_control' field of the + * struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame. + */ +#define IEEE80211_FC0_TYPE_MGT 0x00 + +/** + * Value for "Control" in the 'frame_control' field of the + * struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame. + */ +#define IEEE80211_FC0_TYPE_CTL 0x04 + +/** + * Value for DATA in the 'frame_control' field of the + * struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame. + */ +#define IEEE80211_FC0_TYPE_DATA 0x08 + + GNUNET_NETWORK_STRUCT_BEGIN + /** * A MAC Address. */ @@ -59,26 +79,73 @@ struct GNUNET_TRANSPORT_WLAN_HelperControlMessage */ struct GNUNET_TRANSPORT_WLAN_MacAddress mac; }; -GNUNET_NETWORK_STRUCT_END + /** - * GNUnet bssid + * generic definitions for IEEE 802.11 frames */ -static const struct GNUNET_TRANSPORT_WLAN_MacAddress mac_bssid_gnunet = { - {0x13, 0x22, 0x33, 0x44, 0x55, 0x66} -}; +struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame +{ + /** + * 802.11 Frame Control field. A bitmask. The overall field is a + * 16-bit mask of the respecitve fields. The lowest two bits should + * be 0, then comes the "type" (2 bits, see IEEE80211_FC0_TYPE_* + * constants), followed by 4-bit subtype (all zeros for ad-hoc), + * followed by various flags (to DS, from DS, more frag, retry, + * power management, more data, WEP, strict), all of which we also + * keep at zero. + */ + uint16_t frame_control GNUNET_PACKED; + + /** + * Microseconds to reserve link (duration), 0 by default + */ + uint16_t duration GNUNET_PACKED; + + /** + * Address 1: destination address in ad-hoc mode or AP, BSSID if station, + */ + struct GNUNET_TRANSPORT_WLAN_MacAddress addr1; + + /** + * Address 2: source address if in ad-hoc-mode or station, BSSID if AP + */ + struct GNUNET_TRANSPORT_WLAN_MacAddress addr2; + + /** + * Address 3: BSSID in ad-hoc mode, Destination if station, source if AP + */ + struct GNUNET_TRANSPORT_WLAN_MacAddress addr3; + + /** + * 802.11 sequence control field; contains fragment number an sequence + * number (we set this to all zeros). + */ + uint16_t sequence_control GNUNET_PACKED; + + /** + * Link layer control (LLC). Set to a GNUnet-specific value. + */ + u_int8_t llc[4]; + + /* payload */ + +} GNUNET_PACKED; + /** - * Broadcast MAC + * Message from the plugin to the WLAN helper: send the given message with the + * given connection parameters. */ -static const struct GNUNET_TRANSPORT_WLAN_MacAddress bc_all_mac = { - {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF} -}; +struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage +{ + /** + * Type is 'GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER'. + */ + struct GNUNET_MessageHeader header; -struct Radiotap_Send -{ /** * wlan send rate */ @@ -93,60 +160,100 @@ struct Radiotap_Send * Transmit power expressed as unitless distance from max power set at factory calibration. * 0 is max power. Monotonically nondecreasing with lower power levels. */ - uint16_t tx_power; + uint16_t tx_power GNUNET_PACKED; + + /** + * IEEE Frame to transmit (the sender MAC address will be overwritten by the helper as it does not + * trust the plugin to set it correctly). + */ + struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame frame; + + /* actual payload follows */ }; /** + * Message from the WLAN helper to the plugin: we have received the given message with the + * given performance characteristics. + */ +/** * struct to represent infos gathered form the radiotap fields, see RadiotapHeader for more Infos */ -struct Radiotap_rx +struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage { + + /** + * Type is 'GNUNET_MESSAGE_TYPE_WLAN_DATA_FROM_HELPER'. + */ + struct GNUNET_MessageHeader header; + /** - * FIXME: not initialized properly so far. (supposed to contain - * information about which of the fields below are actually valid). + * Information about which of the fields below are actually valid. + * 0 for none. FIXME: not properly initialized so far (always zero). */ - uint32_t ri_present; + uint32_t ri_present GNUNET_PACKED; /** - * IEEE80211_RADIOTAP_TSFT + * IEEE80211_RADIOTAP_TSFT, 0 if unknown. */ - uint64_t ri_mactime; + uint64_t ri_mactime GNUNET_PACKED; /** * from radiotap * either IEEE80211_RADIOTAP_DBM_ANTSIGNAL - * or IEEE80211_RADIOTAP_DB_ANTSIGNAL + * or IEEE80211_RADIOTAP_DB_ANTSIGNAL, 0 if unknown. */ - int32_t ri_power; + int32_t ri_power GNUNET_PACKED; /** * either IEEE80211_RADIOTAP_DBM_ANTNOISE - * or IEEE80211_RADIOTAP_DB_ANTNOISE + * or IEEE80211_RADIOTAP_DB_ANTNOISE, 0 if unknown. */ - int32_t ri_noise; + int32_t ri_noise GNUNET_PACKED; /** - * IEEE80211_RADIOTAP_CHANNEL + * IEEE80211_RADIOTAP_CHANNEL, 0 if unknown. */ - uint32_t ri_channel; + uint32_t ri_channel GNUNET_PACKED; /** - * Frequency we use. FIXME: not properly initialized so far! + * Frequency we use. 0 if unknown. */ - uint32_t ri_freq; + uint32_t ri_freq GNUNET_PACKED; /** - * IEEE80211_RADIOTAP_RATE * 50000 + * IEEE80211_RADIOTAP_RATE * 50000, 0 if unknown. */ - uint32_t ri_rate; + uint32_t ri_rate GNUNET_PACKED; /** - * IEEE80211_RADIOTAP_ANTENNA + * IEEE80211_RADIOTAP_ANTENNA, 0 if unknown. */ - uint32_t ri_antenna; + uint32_t ri_antenna GNUNET_PACKED; + + /** + * IEEE Frame. + */ + struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame frame; + + /* followed by payload */ }; +GNUNET_NETWORK_STRUCT_END +/** + * GNUnet bssid + */ +static const struct GNUNET_TRANSPORT_WLAN_MacAddress mac_bssid_gnunet = { + {0x13, 0x22, 0x33, 0x44, 0x55, 0x66} +}; + + +/** + * Broadcast MAC + */ +static const struct GNUNET_TRANSPORT_WLAN_MacAddress bc_all_mac = { + {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF} +}; #endif |