diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/gpxe/errfile.h | 1 | ||||
| -rw-r--r-- | src/include/gpxe/ieee80211.h | 1174 | ||||
| -rw-r--r-- | src/include/gpxe/net80211.h | 983 | ||||
| -rw-r--r-- | src/include/gpxe/rc80211.h | 19 |
4 files changed, 2177 insertions, 0 deletions
diff --git a/src/include/gpxe/errfile.h b/src/include/gpxe/errfile.h index d3155324..e777ecb1 100644 --- a/src/include/gpxe/errfile.h +++ b/src/include/gpxe/errfile.h @@ -148,6 +148,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define ERRFILE_ib_pathrec ( ERRFILE_NET | 0x001c0000 ) #define ERRFILE_ib_mcast ( ERRFILE_NET | 0x001d0000 ) #define ERRFILE_ib_cm ( ERRFILE_NET | 0x001e0000 ) +#define ERRFILE_net80211 ( ERRFILE_NET | 0x001f0000 ) #define ERRFILE_image ( ERRFILE_IMAGE | 0x00000000 ) #define ERRFILE_elf ( ERRFILE_IMAGE | 0x00010000 ) diff --git a/src/include/gpxe/ieee80211.h b/src/include/gpxe/ieee80211.h new file mode 100644 index 00000000..e2d25191 --- /dev/null +++ b/src/include/gpxe/ieee80211.h @@ -0,0 +1,1174 @@ +#ifndef _GPXE_IEEE80211_H +#define _GPXE_IEEE80211_H + +#include <gpxe/if_ether.h> /* for ETH_ALEN */ + +/** @file + * Constants and data structures defined in IEEE 802.11, subsetted + * according to what gPXE knows how to use. + */ + +FILE_LICENCE(GPL2_OR_LATER); + +/* ---------- Maximum lengths of things ---------- */ + +/** + * @defgroup ieee80211_maxlen Maximum lengths in the 802.11 protocol + * @{ + */ + +/** Maximum length of frame payload + * + * This does not include cryptographic overhead, which can be up to 20 + * bytes, but it DOES include the 802.2 LLC/SNAP headers that are used + * on data frames (but not management frames). + */ +#define IEEE80211_MAX_DATA_LEN 2304 + +/** Length of LLC/SNAP headers on data frames */ +#define IEEE80211_LLC_HEADER_LEN 8 + +/** Maximum cryptographic overhead before encrypted data */ +#define IEEE80211_MAX_CRYPTO_HEADER 8 + +/** Maximum cryptographic overhead after encrypted data */ +#define IEEE80211_MAX_CRYPTO_TRAILER 12 + +/** Total maximum cryptographic overhead */ +#define IEEE80211_MAX_CRYPTO_OVERHEAD 20 + +/** Bytes of network-layer data that can go into a regular data frame */ +#define IEEE80211_MAX_FRAME_DATA 2296 + +/** Frame header length for frames we might work with + * + * QoS adds a two-byte field on top of this, and APs communicating + * with each other in Wireless Distribution System (WDS) mode add an + * extra 6-byte MAC address field, but we do not work with such + * frames. + */ +#define IEEE80211_TYP_FRAME_HEADER_LEN 24 + +/** Theoretical maximum frame header length + * + * This includes the QoS and WDS Addr4 fields that we should never + * see. + */ +#define IEEE80211_MAX_FRAME_HEADER_LEN 32 + +/** Maximum combined frame length + * + * The biggest frame will include 32 frame header bytes, 20 bytes of + * crypto overhead, and 2304 data bytes. + */ +#define IEEE80211_MAX_FRAME_LEN 2356 + +/** Maximum length of an ESSID */ +#define IEEE80211_MAX_SSID_LEN 32 + +/** @} */ + + +/* ---------- Frame Control defines ---------- */ + +/** + * @defgroup ieee80211_fc 802.11 Frame Control field bits + * @{ + */ + +/** 802.11 Frame Control field, Version bitmask */ +#define IEEE80211_FC_VERSION 0x0003 + +/** Expected value of Version bits in Frame Control */ +#define IEEE80211_THIS_VERSION 0x0000 + + +/** 802.11 Frame Control field, Frame Type bitmask */ +#define IEEE80211_FC_TYPE 0x000C + +/** Type value for management (layer-2) frames */ +#define IEEE80211_TYPE_MGMT 0x0000 + +/** Type value for control (layer-1, hardware-managed) frames */ +#define IEEE80211_TYPE_CTRL 0x0004 + +/** Type value for data frames */ +#define IEEE80211_TYPE_DATA 0x0008 + + +/** 802.11 Frame Control field, Frame Subtype bitmask */ +#define IEEE80211_FC_SUBTYPE 0x00F0 + +/** Subtype value for association-request management frames + * + * Association request frames are sent after authentication from the + * client to the Access Point to establish the client as part of the + * Access Point's network. + */ +#define IEEE80211_STYPE_ASSOC_REQ 0x0000 + +/** Subtype value for association-response management frames + * + * Association response frames are sent by the Access Point to confirm + * or deny the association requested in an association request frame. + */ +#define IEEE80211_STYPE_ASSOC_RESP 0x0010 + +/** Subtype value for reassociation-request management frames + * + * Reassociation request frames are sent by clients wishing to change + * from one Access Point to another while roaming within the same + * extended network (same ESSID). + */ +#define IEEE80211_STYPE_REASSOC_REQ 0x0020 + +/** Subtype value for reassociation-response management frames + * + * Reassociation response frames are sent by the Access Point to + * confirm or deny the swap requested in a reassociation request + * frame. + */ +#define IEEE80211_STYPE_REASSOC_RESP 0x0030 + +/** Subtype value for probe-request management frames + * + * Probe request frames are sent by clients to request that all Access + * Points on the sending channel, or all belonging to a particular + * ESSID, identify themselves by BSSID, supported transfer rates, RF + * configuration, and other capabilities. + */ +#define IEEE80211_STYPE_PROBE_REQ 0x0040 + +/** Subtype value for probe-response management frames + * + * Probe response frames are sent by Access Points in response to + * probe request frames, providing the requested information. + */ +#define IEEE80211_STYPE_PROBE_RESP 0x0050 + +/** Subtype value for beacon management frames + * + * Beacon frames are sent by Access Points at regular intervals, + * usually ten per second, on the channel on which they communicate. + * They can be used to probe passively for access points on a channel + * where local regulatory restrictions prohibit active scanning, or + * due to their regularity as a mechanism to determine the fraction of + * packets that are being dropped. + */ +#define IEEE80211_STYPE_BEACON 0x0080 + +/** Subtype value for disassociation management frames + * + * Disassociation frames are sent by either a client or an Access + * Point to unequivocally terminate the association between the two. + * They may be sent by clients upon leaving the network, or by an + * Access Point upon reconfiguration, among other reasons; they are + * usually more "polite" than deauthentication frames. + */ +#define IEEE80211_STYPE_DISASSOC 0x00A0 + +/** Subtype value for authentication management frames + * + * Authentication frames are exchanged between a client and an Access + * Point before association may be performed. Confusingly, in the most + * common authentication method (Open System) no security tokens are + * exchanged at all. Modern 802.11 security handshaking takes place + * after association. + */ +#define IEEE80211_STYPE_AUTH 0x00B0 + +/** Subtype value for deauthentication management frames + * + * Deauthentication frames are sent by either a client or an Access + * Point to terminate the authentication (and therefore also the + * association) between the two. They are generally more forceful than + * disassociation frames, sent for such reasons as a failure to + * set up security properly after associating. + */ +#define IEEE80211_STYPE_DEAUTH 0x00C0 + +/** Subtype value for action management frames + * + * Action frames are used to implement spectrum management and QoS + * features that gPXE currently does not support. + */ +#define IEEE80211_STYPE_ACTION 0x00D0 + + +/** Subtype value for RTS (request to send) control frames */ +#define IEEE80211_STYPE_RTS 0x00B0 + +/** Subtype value for CTS (clear to send) control frames */ +#define IEEE80211_STYPE_CTS 0x00C0 + +/** Subtype value for ACK (acknowledgement) control frames */ +#define IEEE80211_STYPE_ACK 0x00D0 + + +/** Subtype value for ordinary data frames, with no QoS or CF add-ons */ +#define IEEE80211_STYPE_DATA 0x0000 + +/** Subtype value for data frames containing no data */ +#define IEEE80211_STYPE_NODATA 0x0040 + + +/** 802.11 Frame Control field: To Data System flag + * + * This is set on data frames sent to an Access Point. + */ +#define IEEE80211_FC_TODS 0x0100 + +/** 802.11 Frame Control field: From Data System flag + * + * This is set on data frames sent from an Access Point. If both TODS + * and FROMDS are set, the frame header is a 4-address format used for + * inter-Access Point communication. + */ +#define IEEE80211_FC_FROMDS 0x0200 + +/** 802.11 Frame Control field: More Fragments flag */ +#define IEEE80211_FC_MORE_FRAG 0x0400 + +/** 802.11 Frame Control field: Retransmission flag */ +#define IEEE80211_FC_RETRY 0x0800 + +/** 802.11 Frame Control field: Power Managed flag + * + * This is set on any frame sent by a low-power station that will go + * into a power-saving mode immediately after this frame. Access + * Points are not allowed to act as low-power stations. + */ +#define IEEE80211_FC_PWR_MGMT 0x1000 + +/** 802.11 Frame Control field: More Data flag + * + * This is set on any frame sent by a station that has more data + * queued to be sent than is in the frame. + */ +#define IEEE80211_FC_MORE_DATA 0x2000 + +/** 802.11 Frame Control field: Protected flag + * + * This is set on frames in which data is encrypted (by any method). + */ +#define IEEE80211_FC_PROTECTED 0x4000 + +/** 802.11 Frame Control field: Ordered flag [?] */ +#define IEEE80211_FC_ORDER 0x8000 + +/** @} */ + + +/* ---------- Sequence Control defines ---------- */ + +/** + * @defgroup ieee80211_seq 802.11 Sequence Control field handling + * @{ + */ + +/** Extract sequence number from 802.11 Sequence Control field */ +#define IEEE80211_SEQNR( seq ) ( ( seq ) >> 4 ) + +/** Extract fragment number from 802.11 Sequence Control field */ +#define IEEE80211_FRAG( seq ) ( ( seq ) & 0x000F ) + +/** Make 802.11 Sequence Control field from sequence and fragment numbers */ +#define IEEE80211_MAKESEQ( seqnr, frag ) \ + ( ( ( ( seqnr ) & 0xFFF ) << 4 ) | ( ( frag ) & 0xF ) ) + +/** @} */ + + +/* ---------- Frame header formats ---------- */ + +/** + * @defgroup ieee80211_hdr 802.11 frame header formats + * @{ + */ + +/** An 802.11 data or management frame without QoS or WDS header fields */ +struct ieee80211_frame +{ + u16 fc; /**< 802.11 Frame Control field */ + u16 duration; /**< Microseconds to reserve link */ + u8 addr1[ETH_ALEN]; /**< Address 1 (immediate receiver) */ + u8 addr2[ETH_ALEN]; /**< Address 2 (immediate sender) */ + u8 addr3[ETH_ALEN]; /**< Address 3 (often "forward to") */ + u16 seq; /**< 802.11 Sequence Control field */ + u8 data[0]; /**< Beginning of frame data */ +} __attribute__((packed)); + +/** The 802.2 LLC/SNAP header sent before actual data in a data frame + * + * This header is not acknowledged in the 802.11 standard at all; it + * is treated just like data for MAC-layer purposes, including + * fragmentation and encryption. It is actually two headers + * concatenated: a three-byte 802.2 LLC header indicating Subnetwork + * Accesss Protocol (SNAP) in both source and destination Service + * Access Point (SAP) fields, and a five-byte SNAP header indicating a + * zero OUI and two-byte Ethernet protocol type field. + * + * Thus, an eight-byte header in which six of the bytes are redundant. + * Lovely, isn't it? + */ +struct ieee80211_llc_snap_header +{ + /* LLC part: */ + u8 dsap; /**< Destination SAP ID */ + u8 ssap; /**< Source SAP ID */ + u8 ctrl; /**< Control information */ + + /* SNAP part: */ + u8 oui[3]; /**< Organization code, usually 0 */ + u16 ethertype; /**< Ethernet Type field */ +} __attribute__((packed)); + +/** Value for DSAP field in 802.2 LLC header for 802.11 frames: SNAP */ +#define IEEE80211_LLC_DSAP 0xAA + +/** Value for SSAP field in 802.2 LLC header for 802.11 frames: SNAP */ +#define IEEE80211_LLC_SSAP 0xAA + +/** Value for control field in 802.2 LLC header for 802.11 frames + * + * "Unnumbered Information". + */ +#define IEEE80211_LLC_CTRL 0x03 + + +/** 16-byte RTS frame format, with abbreviated header */ +struct ieee80211_rts +{ + u16 fc; /**< 802.11 Frame Control field */ + u16 duration; /**< Microseconds to reserve link */ + u8 addr1[ETH_ALEN]; /**< Address 1 (immediate receiver) */ + u8 addr2[ETH_ALEN]; /**< Address 2 (immediate sender) */ +} __attribute__((packed)); + +/** Length of 802.11 RTS control frame */ +#define IEEE80211_RTS_LEN 16 + +/** 10-byte CTS or ACK frame format, with abbreviated header */ +struct ieee80211_cts_or_ack +{ + u16 fc; /**< 802.11 Frame Control field */ + u16 duration; /**< Microseconds to reserve link */ + u8 addr1[ETH_ALEN]; /**< Address 1 (immediate receiver) */ +} __attribute__((packed)); + +#define ieee80211_cts ieee80211_cts_or_ack +#define ieee80211_ack ieee80211_cts_or_ack + +/** Length of 802.11 CTS control frame */ +#define IEEE80211_CTS_LEN 10 + +/** Length of 802.11 ACK control frame */ +#define IEEE80211_ACK_LEN 10 + +/** @} */ + + +/* ---------- Capability bits, status and reason codes ---------- */ + +/** + * @defgroup ieee80211_capab 802.11 management frame capability field bits + * @{ + */ + +/** Set if using an Access Point (managed mode) */ +#define IEEE80211_CAPAB_MANAGED 0x0001 + +/** Set if operating in IBSS (no-AP, "Ad-Hoc") mode */ +#define IEEE80211_CAPAB_ADHOC 0x0002 + +/** Set if we support Contention-Free Period operation */ +#define IEEE80211_CAPAB_CFPOLL 0x0004 + +/** Set if we wish to be polled for Contention-Free operation */ +#define IEEE80211_CAPAB_CFPR 0x0008 + +/** Set if the network is encrypted (by any method) */ +#define IEEE80211_CAPAB_PRIVACY 0x0010 + +/** Set if PHY supports short preambles on 802.11b */ +#define IEEE80211_CAPAB_SHORT_PMBL 0x0020 + +/** Set if PHY supports PBCC modulation */ +#define IEEE80211_CAPAB_PBCC 0x0040 + +/** Set if we support Channel Agility */ +#define IEEE80211_CAPAB_CHAN_AGILITY 0x0080 + +/** Set if we support spectrum management (DFS and TPC) on the 5GHz band */ +#define IEEE80211_CAPAB_SPECTRUM_MGMT 0x0100 + +/** Set if we support Quality of Service enhancements */ +#define IEEE80211_CAPAB_QOS 0x0200 + +/** Set if PHY supports short slot time on 802.11g */ +#define IEEE80211_CAPAB_SHORT_SLOT 0x0400 + +/** Set if PHY supports APSD option */ +#define IEEE80211_CAPAB_APSD 0x0800 + +/** Set if PHY supports DSSS/OFDM modulation (one way of 802.11 b/g mixing) */ +#define IEEE80211_CAPAB_DSSS_OFDM 0x2000 + +/** Set if we support delayed block ACK */ +#define IEEE80211_CAPAB_DELAYED_BACK 0x4000 + +/** Set if we support immediate block ACK */ +#define IEEE80211_CAPAB_IMMED_BACK 0x8000 + +/** @} */ + + +/** + * @defgroup ieee80211_status 802.11 status codes + * + * These are returned to indicate an immediate denial of + * authentication or association. In gPXE, the lower 5 bits of the + * status code are encoded into the file-unique portion of an error + * code, the ERRFILE portion is always @c ERRFILE_net80211, and the + * POSIX error code is @c ECONNREFUSED for status 0-31 or @c + * EHOSTUNREACH for status 32-63. + * + * For a complete table with non-abbreviated error messages, see IEEE + * Std 802.11-2007, Table 7-23, p.94. + * + * @{ + */ + +#define IEEE80211_STATUS_SUCCESS 0 +#define IEEE80211_STATUS_FAILURE 1 +#define IEEE80211_STATUS_CAPAB_UNSUPP 10 +#define IEEE80211_STATUS_REASSOC_INVALID 11 +#define IEEE80211_STATUS_ASSOC_DENIED 12 +#define IEEE80211_STATUS_AUTH_ALGO_UNSUPP 13 +#define IEEE80211_STATUS_AUTH_SEQ_INVALID 14 +#define IEEE80211_STATUS_AUTH_CHALL_INVALID 15 +#define IEEE80211_STATUS_AUTH_TIMEOUT 16 +#define IEEE80211_STATUS_ASSOC_NO_ROOM 17 +#define IEEE80211_STATUS_ASSOC_NEED_RATE 18 +#define IEEE80211_STATUS_ASSOC_NEED_SHORT_PMBL 19 +#define IEEE80211_STATUS_ASSOC_NEED_PBCC 20 +#define IEEE80211_STATUS_ASSOC_NEED_CHAN_AGILITY 21 +#define IEEE80211_STATUS_ASSOC_NEED_SPECTRUM_MGMT 22 +#define IEEE80211_STATUS_ASSOC_BAD_POWER 23 +#define IEEE80211_STATUS_ASSOC_BAD_CHANNELS 24 +#define IEEE80211_STATUS_ASSOC_NEED_SHORT_SLOT 25 +#define IEEE80211_STATUS_ASSOC_NEED_DSSS_OFDM 26 +#define IEEE80211_STATUS_QOS_FAILURE 32 +#define IEEE80211_STATUS_QOS_NO_ROOM 33 +#define IEEE80211_STATUS_LINK_IS_HORRIBLE 34 +#define IEEE80211_STATUS_ASSOC_NEED_QOS 35 +#define IEEE80211_STATUS_REQUEST_DECLINED 37 +#define IEEE80211_STATUS_REQUEST_INVALID 38 +#define IEEE80211_STATUS_TS_NOT_CREATED_AGAIN 39 +#define IEEE80211_STATUS_INVALID_IE 40 +#define IEEE80211_STATUS_GROUP_CIPHER_INVALID 41 +#define IEEE80211_STATUS_PAIR_CIPHER_INVALID 42 +#define IEEE80211_STATUS_AKMP_INVALID 43 +#define IEEE80211_STATUS_RSN_VERSION_UNSUPP 44 +#define IEEE80211_STATUS_RSN_CAPAB_INVALID 45 +#define IEEE80211_STATUS_CIPHER_REJECTED 46 +#define IEEE80211_STATUS_TS_NOT_CREATED_WAIT 47 +#define IEEE80211_STATUS_DIRECT_LINK_FORBIDDEN 48 +#define IEEE80211_STATUS_DEST_NOT_PRESENT 49 +#define IEEE80211_STATUS_DEST_NOT_QOS 50 +#define IEEE80211_STATUS_ASSOC_LISTEN_TOO_HIGH 51 + +/** @} */ + + + +/** + * @defgroup ieee80211_reason 802.11 reason codes + * + * These are returned to indicate the reason for a deauthentication or + * disassociation sent (usually) after authentication or association + * had succeeded. In gPXE, the lower 5 bits of the reason code are + * encoded into the file-unique portion of an error code, the ERRFILE + * portion is always @c ERRFILE_net80211, and the POSIX error code is + * @c ECONNRESET for reason 0-31 or @c ENETRESET for reason 32-63. + * + * For a complete table with non-abbreviated error messages, see IEEE + * Std 802.11-2007, Table 7-22, p.92. + * + * @{ + */ + +#define IEEE80211_REASON_NONE 0 +#define IEEE80211_REASON_UNSPECIFIED 1 +#define IEEE80211_REASON_AUTH_NO_LONGER_VALID 2 +#define IEEE80211_REASON_LEAVING 3 +#define IEEE80211_REASON_INACTIVITY 4 +#define IEEE80211_REASON_OUT_OF_RESOURCES 5 +#define IEEE80211_REASON_NEED_AUTH 6 +#define IEEE80211_REASON_NEED_ASSOC 7 +#define IEEE80211_REASON_LEAVING_TO_ROAM 8 +#define IEEE80211_REASON_REASSOC_INVALID 9 +#define IEEE80211_REASON_BAD_POWER 10 +#define IEEE80211_REASON_BAD_CHANNELS 11 +#define IEEE80211_REASON_INVALID_IE 13 +#define IEEE80211_REASON_MIC_FAILURE 14 +#define IEEE80211_REASON_4WAY_TIMEOUT 15 +#define IEEE80211_REASON_GROUPKEY_TIMEOUT 16 +#define IEEE80211_REASON_4WAY_INVALID 17 +#define IEEE80211_REASON_GROUP_CIPHER_INVALID 18 +#define IEEE80211_REASON_PAIR_CIPHER_INVALID 19 +#define IEEE80211_REASON_AKMP_INVALID 20 +#define IEEE80211_REASON_RSN_VERSION_INVALID 21 +#define IEEE80211_REASON_RSN_CAPAB_INVALID 22 +#define IEEE80211_REASON_8021X_FAILURE 23 +#define IEEE80211_REASON_CIPHER_REJECTED 24 +#define IEEE80211_REASON_QOS_UNSPECIFIED 32 +#define IEEE80211_REASON_QOS_OUT_OF_RESOURCES 33 +#define IEEE80211_REASON_LINK_IS_HORRIBLE 34 +#define IEEE80211_REASON_INVALID_TXOP 35 +#define IEEE80211_REASON_REQUESTED_LEAVING 36 +#define IEEE80211_REASON_REQUESTED_NO_USE 37 +#define IEEE80211_REASON_REQUESTED_NEED_SETUP 38 +#define IEEE80211_REASON_REQUESTED_TIMEOUT 39 +#define IEEE80211_REASON_CIPHER_UNSUPPORTED 45 + +/** @} */ + +/* ---------- Information element declarations ---------- */ + +/** + * @defgroup ieee80211_ie 802.11 information elements + * + * Many management frames include a section that amounts to a + * concatenation of these information elements, so that the sender can + * choose which information to send and the receiver can ignore the + * parts it doesn't understand. Each IE contains a two-byte header, + * one byte ID and one byte length, followed by IE-specific data. The + * length does not include the two-byte header. Information elements + * are required to be sorted by ID, but gPXE does not require that in + * those it receives. + * + * This group also includes a few inline functions to simplify common + * tasks in IE processing. + * + * @{ + */ + +/** Generic 802.11 information element header */ +struct ieee80211_ie_header { + u8 id; /**< Information element ID */ + u8 len; /**< Information element length */ +} __attribute__ ((packed)); + + +/** 802.11 SSID information element */ +struct ieee80211_ie_ssid { + u8 id; /**< SSID ID: 0 */ + u8 len; /**< SSID length */ + char ssid[0]; /**< SSID data, not NUL-terminated */ +} __attribute__ ((packed)); + +/** Information element ID for SSID information element */ +#define IEEE80211_IE_SSID 0 + + +/** 802.11 rates information element + * + * The first 8 rates go in an IE of type RATES (1), and any more rates + * go in one of type EXT_RATES (50). Each rate is a byte with the low + * 7 bits equal to the rate in units of 500 kbps, and the high bit set + * if and only if the rate is "basic" (must be supported by all + * connected stations). + */ +struct ieee80211_ie_rates { + u8 id; /**< Rates ID: 1 or 50 */ + u8 len; /**< Number of rates */ + u8 rates[0]; /**< Rates data, one rate per byte */ +} __attribute__ ((packed)); + +/** Information element ID for rates information element */ +#define IEEE80211_IE_RATES 1 + +/** Information element ID for extended rates information element */ +#define IEEE80211_IE_EXT_RATES 50 + + +/** 802.11 Direct Spectrum parameter information element + * + * This just contains the channel number. It has the fancy name + * because IEEE 802.11 also defines a frequency-hopping PHY that + * changes channels at regular intervals following a predetermined + * pattern; in practice nobody uses the FH PHY. + */ +struct ieee80211_ie_ds_param { + u8 id; /**< DS parameter ID: 3 */ + u8 len; /**< DS parameter length: 1 */ + u8 current_channel; /**< Current channel number, 1-14 */ +} __attribute__ ((packed)); + +/** Information element ID for Direct Spectrum parameter information element */ +#define IEEE80211_IE_DS_PARAM 3 + + +/** 802.11 Country information element regulatory extension triplet */ +struct ieee80211_ie_country_ext_triplet { + u8 reg_ext_id; /**< Regulatory extension ID */ + u8 reg_class_id; /**< Regulatory class ID */ + u8 coverage_class; /**< Coverage class */ +} __attribute__ ((packed)); + +/** 802.11 Country information element regulatory band triplet */ +struct ieee80211_ie_country_band_triplet { + u8 first_channel; /**< Channel number for first channel in band */ + u8 nr_channels; /**< Number of contiguous channels in band */ + u8 max_txpower; /**< Maximum TX power in dBm */ +} __attribute__ ((packed)); + +/** 802.11 Country information element regulatory triplet + * + * It is a band triplet if the first byte is 200 or less, and a + * regulatory extension triplet otherwise. + */ +union ieee80211_ie_country_triplet { + /** Differentiator between band and ext triplets */ + u8 first; + + /** Information about a band of channels */ + struct ieee80211_ie_country_band_triplet band; + + /** Regulatory extension information */ + struct ieee80211_ie_country_ext_triplet ext; +}; + +/** 802.11 Country information element + * + * This contains some data about RF regulations. + */ +struct ieee80211_ie_country { + u8 id; /**< Country information ID: 7 */ + u8 len; /**< Country information length: varies */ + char name[2]; /**< ISO Alpha2 country code */ + char in_out; /**< 'I' for indoor, 'O' for outdoor */ + + /** List of regulatory triplets */ + union ieee80211_ie_country_triplet triplet[0]; +} __attribute__ ((packed)); + +/** Information element ID for Country information element */ +#define IEEE80211_IE_COUNTRY 7 + + +/** 802.11 Request information element + * + * This contains a list of information element types we would like to + * be included in probe response frames. + */ +struct ieee80211_ie_request { + u8 id; /**< Request ID: 10 */ + u8 len; /**< Number of IEs requested */ + u8 request[0]; /**< List of IEs requested */ +} __attribute__ ((packed)); + +/** Information element ID for Request information element */ +#define IEEE80211_IE_REQUEST 10 + + +/** 802.11 Challenge Text information element + * + * This is used in authentication frames under Shared Key + * authentication. + */ +struct ieee80211_ie_challenge_text { + u8 id; /**< Challenge Text ID: 16 */ + u8 len; /**< Challenge Text length: usually 128 */ + u8 challenge_text[0]; /**< Challenge Text data */ +} __attribute__ ((packed)); + +/** Information element ID for Challenge Text information element */ +#define IEEE80211_IE_CHALLENGE_TEXT 16 + + +/** 802.11 Power Constraint information element + * + * This is used to specify an additional power limitation on top of + * the Country requirements. + */ +struct ieee80211_ie_power_constraint { + u8 id; /**< Power Constraint ID: 52 */ + u8 len; /**< Power Constraint length: 1 */ + u8 power_constraint; /**< Decrease in allowed TX power, dBm */ +} __attribute__ ((packed)); + +/** Information element ID for Power Constraint information element */ +#define IEEE80211_IE_POWER_CONSTRAINT 52 + + +/** 802.11 Power Capability information element + * + * This is used in association request frames to indicate the extremes + * of our TX power abilities. It is required only if we indicate + * support for spectrum management. + */ +struct ieee80211_ie_power_capab { + u8 id; /**< Power Capability ID: 33 */ + u8 len; /**< Power Capability length: 2 */ + u8 min_txpower; /**< Minimum possible TX power, dBm */ + u8 max_txpower; /**< Maximum possible TX power, dBm */ +} __attribute__ ((packed)); + +/** Information element ID for Power Capability information element */ +#define IEEE80211_IE_POWER_CAPAB 33 + + +/** 802.11 Channels information element channel band tuple */ +struct ieee80211_ie_channels_channel_band { + u8 first_channel; /**< Channel number of first channel in band */ + u8 nr_channels; /**< Number of channels in band */ +} __attribute__ ((packed)); + +/** 802.11 Channels information element + * + * This is used in association frames to indicate the channels we can + * use. It is required only if we indicate support for spectrum + * management. + */ +struct ieee80211_ie_channels { + u8 id; /**< Channels ID: 36 */ + u8 len; /**< Channels length: 2 */ + + /** List of (start, length) channel bands we can use */ + struct ieee80211_ie_channels_channel_band channels[0]; +} __attribute__ ((packed)); + +/** Information element ID for Channels information element */ +#define IEEE80211_IE_CHANNELS 36 + + +/** 802.11 ERP Information information element + * + * This is used to communicate some PHY-level flags. + */ +struct ieee80211_ie_erp_info { + u8 id; /**< ERP Information ID: 42 */ + u8 len; /**< ERP Information length: 1 */ + u8 erp_info; /**< ERP flags */ +} __attribute__ ((packed)); + +/** Information element ID for ERP Information information element */ +#define IEEE80211_IE_ERP_INFO 42 + +/** ERP information element: Flag set if 802.11b stations are present */ +#define IEEE80211_ERP_NONERP_PRESENT 0x01 + +/** ERP information element: Flag set if CTS protection must be used */ +#define IEEE80211_ERP_USE_PROTECTION 0x02 + +/** ERP information element: Flag set if long preambles must be used */ +#define IEEE80211_ERP_BARKER_LONG 0x04 + + +/** 802.11 Robust Security Network ("WPA") information element + * + * Showing once again a striking clarity of design, the IEEE folks put + * dynamically-sized data in the middle of this structure. As such, + * the below structure definition is only a guideline; the + * @c IEEE80211_RSN_FIELD, @c IEEE80211_RSN_CIPHER, and + * @c IEEE80211_RSN_AUTHTYPE macros should be used to access any + * data. + * + * Also inspired was IEEE's choice of 16-bit fields to count the + * number of 4-byte elements in a structure with a maximum length of + * 255 bytes. + * + * Many fields reference a cipher or authentication-type ID; this is a + * three-byte OUI followed by one byte identifying the cipher with + * respect to that OUI. For all standard ciphers the OUI is 00:0F:AC. + * + * The authentication types referenced in this structure have nothing + * to do with 802.11 authentication frames or the @c algorithm field + * within them. + */ +struct ieee80211_ie_rsn { + /** Information element ID */ + u8 id; + + /** Information element length */ + u8 len; + + /** RSN information element version */ + u16 version; + + /** Cipher ID for the cipher used in multicast/broadcast frames */ + u8 group_cipher[4]; + + /** Number of unicast ciphers supported */ + u16 pairwise_count; + + /** List of cipher IDs for supported unicast frame ciphers */ + u8 pairwise_cipher[4]; + + /** Number of authentication types supported */ + u16 akm_count; + + /** List of authentication type IDs for supported types */ + u8 akm_list[4]; + + /** Security capabilities field. */ + u16 rsn_capab; + + /** Number of PMKIDs included (present only in association frames) */ + u16 pmkid_count; + + /** List of PMKIDs included, each a 16-byte SHA1 hash */ + u8 pmkid_list[0]; +} __attribute__((packed)); + +/** Information element ID for Robust Security Network information element */ +#define IEEE80211_IE_RSN 48 + +/** OUI for standard ciphers in RSN information element */ +#define IEEE80211_RSN_OUI "\x00\x0F\xAC" + +/** Extract RSN IE version field */ +#define IEEE80211_RSN_FIELD_version( rsnp ) ( (rsnp)->version ) + +/** Extract RSN IE group_cipher field */ +#define IEEE80211_RSN_FIELD_group_cipher( rsnp ) ( (rsnp)->group_cipher ) + +/** Extract RSN IE pairwise_count field */ +#define IEEE80211_RSN_FIELD_pairwise_count( rsnp ) ( (rsnp)->pairwise_count ) + +/** Extract RSN IE akm_count field */ +#define IEEE80211_RSN_FIELD_akm_count( rsnp ) \ + ( ( ( struct ieee80211_ie_rsn * ) ( ( void * ) ( rsnp ) + \ + 4*( ( rsnp )->pairwise_count - 1 ) ) )->akm_count ) + +/** Extract RSN IE rsn_capab field */ +#define IEEE80211_RSN_FIELD_rsn_capab( rsnp ) \ + ( ( ( struct ieee80211_ie_rsn * ) ( ( void * ) ( rsnp ) + \ + 4*( ( rsnp )->pairwise_count - 1 ) + \ + 4*( ( rsnp )->akm_count - 1 ) ) )->rsn_capab ) + +/** Extract RSN IE pmkid_count field */ +#define IEEE80211_RSN_FIELD_pmkid_count( rsnp ) \ + ( ( ( struct ieee80211_ie_rsn * ) ( ( void * ) ( rsnp ) + \ + 4*( ( rsnp )->pairwise_count - 1 ) + \ + 4*( ( rsnp )->akm_count - 1 ) ) )->pmkid_count ) + +/** Extract field from RSN information element + * + * @v rsnp Pointer to RSN information element + * @v field Name of field to extract + * @ret val Lvalue of the requested field + * + * You must fill the fields of the structure in order for this to work + * properly. + */ +#define IEEE80211_RSN_FIELD( rsnp, field ) \ + IEEE80211_RSN_FIELD_ ## field ( rsnp ) + +/** Get pointer to pairwise cipher from RSN information element + * + * @v rsnp Pointer to RSN information element + * @v cipher Index of pairwise cipher to extract + * @ret ptr Pointer to requested cipher + */ +#define IEEE80211_RSN_CIPHER( rsnp, cipher ) \ + ( ( rsnp )->pairwise_cipher + 4 * ( cipher ) ) + +/** Get pointer to authentication type from RSN information element + * + * @v rsnp Pointer to RSN information element + * @v akm Index of authentication type to extract + * @ret ptr Pointer to requested authentication type + * + * The @c pairwise_count field must be correct. + */ +#define IEEE80211_RSN_AUTHTYPE( rsnp, akm ) \ + ( ( rsnp )->akm_list + 4 * ( ( rsnp )->pairwise_count - 1 ) + 4 * ( akm ) ) + +/** Get pointer to PMKID from RSN information element + * + * @v rsnp Pointer to RSN information element + * @v idx Index of PMKID to extract + * @ret ptr Pointer to requested PMKID + * + * The @c pairwise_count and @c akm_count fields must be correct. + */ +#define IEEE80211_RSN_PMKID( rsnp, idx ) \ + ( ( rsnp )->pmkid_list + 4 * ( ( rsnp )->pairwise_count - 1 ) + \ + 4 * ( ( rsnp )->akm_count - 1 ) + 16 * ( idx ) ) + +/** Verify size of RSN information element + * + * @v rsnp Pointer to RSN information element + * @ret ok TRUE if count fields are consistent with length field + * + * It is important to drop any RSN IE that does not pass this function + * before using the @c IEEE80211_RSN_FIELD, @c IEEE80211_RSN_CIPHER, + * and @c IEEE80211_RSN_AUTHTYPE macros, to avoid potential security + * compromise due to a malformed RSN IE. + * + * This function does not consider the possibility of some PMKIDs + * included in the RSN IE, because PMKIDs are only included in RSN IEs + * sent in association request frames, and we should never receive an + * association request frame. An RSN IE that includes PMKIDs will + * always fail this check. + */ +static inline int ieee80211_rsn_check ( struct ieee80211_ie_rsn *rsnp ) { + if ( rsnp->len < 12 + 4 * rsnp->pairwise_count ) + return 0; + return ( rsnp->len == 12 + 4 * ( rsnp->pairwise_count + + IEEE80211_RSN_FIELD ( rsnp, akm_count ) ) ); +} + +/** Calculate necessary size of RSN information element + * + * @v npair Number of pairwise ciphers supported + * @v nauth Number of authentication types supported + * @v npmkid Number of PMKIDs to include + * @ret size Necessary size of RSN IE, including header bytes + */ +static inline size_t ieee80211_rsn_size ( int npair, int nauth, int npmkid ) { + return 16 + 4 * ( npair + nauth ) + 16 * npmkid; +} + +/** 802.11 RSN IE: expected version number */ +#define IEEE80211_RSN_VERSION 1 + +/** 802.11 RSN IE: fourth byte of cipher type for 40-bit WEP */ +#define IEEE80211_RSN_CTYPE_WEP40 1 + +/** 802.11 RSN IE: fourth byte of cipher type for 104-bit WEP */ +#define IEEE80211_RSN_CTYPE_WEP104 5 + +/** 802.11 RSN IE: fourth byte of cipher type for TKIP ("WPA") */ +#define IEEE80211_RSN_CTYPE_TKIP 2 + +/** 802.11 RSN IE: fourth byte of cipher type for CCMP ("WPA2") */ +#define IEEE80211_RSN_CTYPE_CCMP 4 + +/** 802.11 RSN IE: fourth byte of cipher type for "use group" + * + * This can only appear as a pairwise cipher, and means unicast frames + * should be encrypted in the same way as broadcast/multicast frames. + */ +#define IEEE80211_RSN_CTYPE_USEGROUP 0 + +/** 802.11 RSN IE: fourth byte of auth method type for using an 802.1X server */ +#define IEEE80211_RSN_ATYPE_8021X 1 + +/** 802.11 RSN IE: fourth byte of auth method type for using a pre-shared key */ +#define IEEE80211_RSN_ATYPE_PSK 2 + +/** 802.11 RSN IE capabilities: AP supports pre-authentication */ +#define IEEE80211_RSN_CAPAB_PREAUTH 0x001 + +/** 802.11 RSN IE capabilities: Node has conflict between TKIP and WEP + * + * This is a legacy issue; APs always set it to 0, and gPXE sets it to + * 0. + */ +#define IEEE80211_RSN_CAPAB_NO_PAIRWISE 0x002 + +/** 802.11 RSN IE capabilities: Number of PTKSA replay counters + * + * A value of 0 means one replay counter, 1 means two, 2 means four, + * and 3 means sixteen. + */ +#define IEEE80211_RSN_CAPAB_PTKSA_REPLAY 0x00C + +/** 802.11 RSN IE capabilities: Number of GTKSA replay counters + * + * A value of 0 means one replay counter, 1 means two, 2 means four, + * and 3 means sixteen. + */ +#define IEEE80211_RSN_CAPAB_GTKSA_REPLAY 0x030 + +/** 802.11 RSN IE capabilities: PeerKey Handshaking is suported */ +#define IEEE80211_RSN_CAPAB_PEERKEY 0x200 + + + +/** Any 802.11 information element + * + * This is formatted for ease of use, so IEs with complex structures + * get referenced in full, while those with only one byte of data or a + * simple array are pulled in to avoid a layer of indirection like + * ie->channels.channels[0]. + */ +union ieee80211_ie +{ + /** Generic and simple information element info */ + struct { + u8 id; /**< Information element ID */ + u8 len; /**< Information element data length */ + union { + char ssid[0]; /**< SSID text */ + u8 rates[0]; /**< Rates data */ + u8 request[0]; /**< Request list */ + u8 challenge_text[0]; /**< Challenge text data */ + u8 power_constraint; /**< Power constraint, dBm */ + u8 erp_info; /**< ERP information flags */ + /** List of channels */ + struct ieee80211_ie_channels_channel_band channels[0]; + }; + }; + + /** DS parameter set */ + struct ieee80211_ie_ds_param ds_param; + + /** Country information */ + struct ieee80211_ie_country country; + + /** Power capability */ + struct ieee80211_ie_power_capab power_capab; + + /** Security information */ + struct ieee80211_ie_rsn rsn; +}; + +/** Advance to next 802.11 information element + * + * @v ie Current information element pointer + * @v end Pointer to first byte not in information element space + * @ret next Pointer to next information element, or NULL if no more + * + * When processing received IEs, @a end should be set to the I/O + * buffer tail pointer; when marshalling IEs for sending, @a end + * should be NULL. + */ +static inline union ieee80211_ie * ieee80211_next_ie ( union ieee80211_ie *ie, + void *end ) +{ + void *next_ie_byte = ( void * ) ie + ie->len + 2; + union ieee80211_ie *next_ie = next_ie_byte; + + if ( ! end ) + return next_ie; + + if ( next_ie_byte < end && next_ie_byte + next_ie->len <= end ) + return next_ie; + + return NULL; +} + +/** @} */ + + +/* ---------- Management frame data formats ---------- */ + +/** + * @defgroup ieee80211_mgmt_data Management frame data payloads + * @{ + */ + +/** Beacon or probe response frame data */ +struct ieee80211_beacon_or_probe_resp +{ + /** 802.11 TSFT value at frame send */ + u64 timestamp; + + /** Interval at which beacons are sent, in units of 1024 us */ + u16 beacon_interval; + + /** Capability flags */ + u16 capability; + + /** List of information elements */ + union ieee80211_ie info_element[0]; +} __attribute__((packed)); + +#define ieee80211_beacon ieee80211_beacon_or_probe_resp +#define ieee80211_probe_resp ieee80211_beacon_or_probe_resp + +/** Disassociation or deauthentication frame data */ +struct ieee80211_disassoc_or_deauth +{ + /** Reason code */ + u16 reason; +} __attribute__((packed)); + +#define ieee80211_disassoc ieee80211_disassoc_or_deauth +#define ieee80211_deauth ieee80211_disassoc_or_deauth + +/** Association request frame data */ +struct ieee80211_assoc_req +{ + /** Capability flags */ + u16 capability; + + /** Interval at which we wake up, in units of the beacon interval */ + u16 listen_interval; + + /** List of information elements */ + union ieee80211_ie info_element[0]; +} __attribute__((packed)); + +/** Association or reassociation response frame data */ +struct ieee80211_assoc_or_reassoc_resp +{ + /** Capability flags */ + u16 capability; + + /** Status code */ + u16 status; + + /** Association ID */ + u16 aid; + + /** List of information elements */ + union ieee80211_ie info_element[0]; +} __attribute__((packed)); + +#define ieee80211_assoc_resp ieee80211_assoc_or_reassoc_resp +#define ieee80211_reassoc_resp ieee80211_assoc_or_reassoc_resp + +/** Reassociation request frame data */ +struct ieee80211_reassoc_req +{ + /** Capability flags */ + u16 capability; + + /** Interval at which we wake up, in units of the beacon interval */ + u16 listen_interval; + + /** MAC address of current Access Point */ + u8 current_addr[ETH_ALEN]; + + /** List of information elements */ + union ieee80211_ie info_element[0]; +} __attribute__((packed)); + +/** Probe request frame data */ +struct ieee80211_probe_req +{ + /** List of information elements */ + union ieee80211_ie info_element[0]; +} __attribute__((packed)); + +/** Authentication frame data */ +struct ieee80211_auth +{ + /** Authentication algorithm (Open System or Shared Key) */ + u16 algorithm; + + /** Sequence number of this frame; first from client to AP is 1 */ + u16 tx_seq; + + /** Status code */ + u16 status; + + /** List of information elements */ + union ieee80211_ie info_element[0]; +} __attribute__((packed)); + +/** Open System authentication algorithm */ +#define IEEE80211_AUTH_OPEN_SYSTEM 0 + +/** Shared Key authentication algorithm */ +#define IEEE80211_AUTH_SHARED_KEY 1 + +/** @} */ + +#endif diff --git a/src/include/gpxe/net80211.h b/src/include/gpxe/net80211.h new file mode 100644 index 00000000..a1bddd5d --- /dev/null +++ b/src/include/gpxe/net80211.h @@ -0,0 +1,983 @@ +#ifndef _GPXE_NET80211_H +#define _GPXE_NET80211_H + +#include <gpxe/process.h> +#include <gpxe/ieee80211.h> +#include <gpxe/iobuf.h> +#include <gpxe/netdevice.h> +#include <gpxe/rc80211.h> + +/** @file + * + * The gPXE 802.11 MAC layer. + */ + +/* + * Major things NOT YET supported: + * - any type of security + * - 802.11n + * + * Major things that probably will NEVER be supported, barring a + * compelling use case and/or corporate sponsorship: + * - QoS + * - 802.1X authentication ("WPA Enterprise") + * - Contention-free periods + * - "ad-hoc" networks (IBSS), monitor mode, host AP mode + * - hidden networks on the 5GHz band due to regulatory issues + * - spectrum management on the 5GHz band (TPC and DFS), as required + * in some non-US regulatory domains + * - Clause 14 PHYs (Frequency-Hopping Spread Spectrum on 2.4GHz) + * and Clause 16 PHYs (infrared) - I'm not aware of any real-world + * use of these. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +/* All 802.11 devices are handled using a generic "802.11 device" + net_device, with a link in its `priv' field to a net80211_device + which we use to handle 802.11-specific details. */ + + +/** @defgroup net80211_band RF bands on which an 802.11 device can transmit */ +/** @{ */ + +/** The 2.4 GHz ISM band, unlicensed in most countries */ +#define NET80211_BAND_2GHZ (1 << 0) +/** The band from 4.9 GHz to 5.7 GHz, which tends to be more restricted */ +#define NET80211_BAND_5GHZ (1 << 1) + +/** @} */ + + +/** @defgroup net80211_mode 802.11 operation modes supported by hardware */ +/** @{ */ + +/** 802.11a: 54 Mbps operation using OFDM signaling on the 5GHz band */ +#define NET80211_MODE_A (1 << 0) + +/** 802.11b: 1-11 Mbps operation using DSSS/CCK signaling on the 2.4GHz band */ +#define NET80211_MODE_B (1 << 1) + +/** 802.11g: 54 Mbps operation using ERP/OFDM signaling on the 2.4GHz band */ +#define NET80211_MODE_G (1 << 2) + +/** 802.11n: High-rate operation using MIMO technology on 2.4GHz or 5GHz */ +#define NET80211_MODE_N (1 << 3) + +/** @} */ + + +/** @defgroup net80211_cfg Constants for the net80211 config callback */ +/** @{ */ + +/** Channel choice (@c dev->channel) or regulatory parameters have changed */ +#define NET80211_CFG_CHANNEL (1 << 0) + +/** Requested transmission rate (@c dev->rate) has changed */ +#define NET80211_CFG_RATE (1 << 1) + +/** Association has been established with a new BSS (@c dev->bssid) */ +#define NET80211_CFG_ASSOC (1 << 2) + +/** Low-level link parameters (short preamble, protection, etc) have changed */ +#define NET80211_CFG_PHY_PARAMS (1 << 3) + +/** @} */ + + +/** An 802.11 security handshaking protocol */ +enum net80211_security_proto { + /** No security handshaking + * + * This might be used with an open network or with WEP, as + * WEP does not have a cryptographic handshaking phase. + */ + NET80211_SECPROT_NONE = 0, + + /** Pre-shared key handshaking + * + * This implements the "WPA Personal" handshake. 802.1X + * authentication is not performed -- the user supplies a + * pre-shared key directly -- but there is a 4-way handshake + * between client and AP to verify that both have the same key + * without revealing the contents of that key. + */ + NET80211_SECPROT_PSK = 1, + + /** Full EAP 802.1X handshaking + * + * This implements the "WPA Enterprise" handshake, connecting + * to an 802.1X authentication server to provide credentials + * and receive a pairwise master key (PMK), which is then used + * in the same 4-way handshake as the PSK method. + */ + NET80211_SECPROT_EAP = 2, +}; + + +/** An 802.11 data encryption algorithm */ +enum net80211_crypto_alg { + /** No security, an "Open" network */ + NET80211_CRYPT_NONE = 0, + + /** Network protected with WEP (awful RC4-based system) + * + * WEP uses a naive application of RC4, with a monotonically + * increasing initialization vector that is prepended to the + * key to initialize the RC4 keystream. It is highly insecure + * and can be completely cracked or subverted using automated, + * robust, freely available tools (aircrack-ng) in minutes. + * + * 40-bit and 104-bit WEP are differentiated only by the size + * of the key. They may be advertised as 64-bit and 128-bit, + * counting the non-random IV as part of the key bits. + */ + NET80211_CRYPT_WEP = 1, + + /** Network protected with TKIP (better RC4-based system) + * + * Usually known by its trade name of WPA (Wi-Fi Protected + * Access), TKIP implements a message integrity code (MIC) + * called Michael, a timestamp counter for replay prevention, + * and a key mixing function that together remove almost all + * the security problems with WEP. Countermeasures are + * implemented to prevent high data-rate attacks. + * + * There exists one known attack on TKIP, that allows one to + * send between 7 and 15 arbitrary short data packets on a + * QoS-enabled network given about an hour of data + * gathering. Since gPXE does not support QoS for 802.11 + * networks, this is not a threat to us. The only other method + * is a brute-force passphrase attack. + */ + NET80211_CRYPT_TKIP = 2, + + /** Network protected with CCMP (AES-based system) + * + * Often called WPA2 in commerce, or RSNA (Robust Security + * Network Architecture) in the 802.11 standard, CCMP is + * highly secure and does not have any known attack vectors. + * Since it is based on a block cipher, the statistical + * correlation and "chopchop" attacks used with great success + * against WEP and minor success against TKIP fail. + */ + NET80211_CRYPT_CCMP = 3, +}; + + +/** @defgroup net80211_state Bits for the 802.11 association state field */ +/** @{ */ + +/** An error code indicating the failure mode, or 0 if successful */ +#define NET80211_STATUS_MASK 0x7F + +/** Whether the error code provided is a "reason" code, not a "status" code */ +#define NET80211_IS_REASON 0x80 + +/** Whether we have found the network we will be associating with */ +#define NET80211_PROBED (1 << 8) + +/** Whether we have successfully authenticated with the network + * + * This usually has nothing to do with actual security; it is a + * holdover from older 802.11 implementation ideas. + */ +#define NET80211_AUTHENTICATED (1 << 9) + +/** Whether we have successfully associated with the network */ +#define NET80211_ASSOCIATED (1 << 10) + +/** Whether we have completed security handshaking with the network + * + * Once this is set, we can send data packets. For that reason this + * bit is set even in cases where no security handshaking is + * required. + */ +#define NET80211_CRYPTO_SYNCED (1 << 11) + +/** Whether the auto-association task is running */ +#define NET80211_WORKING (1 << 12) + +/** Whether the auto-association task is waiting for a reply from the AP */ +#define NET80211_WAITING (1 << 13) + +/** Whether the auto-association task should be suppressed + * + * This is set by the `iwlist' command so that it can open the device + * without starting another probe process that will interfere with its + * own. + */ +#define NET80211_NO_ASSOC (1 << 14) + +/** Whether this association was performed using a broadcast SSID + * + * If the user opened this device without netX/ssid set, the device's + * SSID will be set to that of the network it chooses to associate + * with, but the netX/ssid setting will remain blank. If we don't + * remember that we started from no specified SSID, it will appear + * every time settings are updated (e.g. after DHCP) that we need to + * reassociate due to the difference between the set SSID and our own. + */ +#define NET80211_AUTO_SSID (1 << 15) + + +/** @} */ + + +/** @defgroup net80211_phy 802.11 physical layer flags */ +/** @{ */ + +/** Whether to use RTS/CTS or CTS-to-self protection for transmissions + * + * Since the RTS or CTS is transmitted using 802.11b signaling, and + * includes a field indicating the amount of time that will be used by + * transmission of the following packet, this serves as an effective + * protection mechanism to avoid 802.11b clients interfering with + * 802.11g clients on mixed networks. + */ +#define NET80211_PHY_USE_PROTECTION (1 << 1) + +/** Whether to use 802.11b short preamble operation + * + * Short-preamble operation can moderately increase throughput on + * 802.11b networks operating between 2Mbps and 11Mbps. It is + * irrelevant for 802.11g data rates, since they use a different + * modulation scheme. + */ +#define NET80211_PHY_USE_SHORT_PREAMBLE (1 << 2) + +/** Whether to use 802.11g short slot operation + * + * This affects a low-level timing parameter of 802.11g transmissions. + */ +#define NET80211_PHY_USE_SHORT_SLOT (1 << 3) + +/** @} */ + + +/** The maximum number of TX rates we allow to be configured simultaneously */ +#define NET80211_MAX_RATES 16 + +/** The maximum number of channels we allow to be configured simultaneously */ +#define NET80211_MAX_CHANNELS 32 + +/** Seconds we'll wait to get all fragments of a packet */ +#define NET80211_FRAG_TIMEOUT 2 + +/** The number of fragments we can receive at once + * + * The 802.11 standard requires that this be at least 3. + */ +#define NET80211_NR_CONCURRENT_FRAGS 3 + +/** Maximum TX power to allow (dBm), if we don't get a regulatory hint */ +#define NET80211_REG_TXPOWER 20 + + +struct net80211_device; + +/** Operations that must be implemented by an 802.11 driver */ +struct net80211_device_operations { + /** Open 802.11 device + * + * @v dev 802.11 device + * @ret rc Return status code + * + * This method should allocate RX I/O buffers and enable the + * hardware to start transmitting and receiving packets on the + * channels its net80211_register() call indicated it could + * handle. It does not need to tune the antenna to receive + * packets on any particular channel. + */ + int ( * open ) ( struct net80211_device *dev ); + + /** Close 802.11 network device + * + * @v dev 802.11 device + * + * This method should stop the flow of packets, and call + * net80211_tx_complete() for any packets remaining in the + * device's TX queue. + */ + void ( * close ) ( struct net80211_device *dev ); + + /** Transmit packet on 802.11 network device + * + * @v dev 802.11 device + * @v iobuf I/O buffer + * @ret rc Return status code + * + * This method should cause the hardware to initiate + * transmission of the I/O buffer, using the channel and rate + * most recently indicated by an appropriate call to the + * @c config callback. The 802.11 layer guarantees that said + * channel and rate will be the same as those currently + * reflected in the fields of @a dev. + * + * If this method returns success, the I/O buffer remains + * owned by the network layer's TX queue, and the driver must + * eventually call net80211_tx_complete() to free the buffer + * whether transmission succeeded or not. If this method + * returns failure, it will be interpreted as "failure to + * enqueue buffer" and the I/O buffer will be immediately + * released. + * + * This method is guaranteed to be called only when the device + * is open. + */ + int ( * transmit ) ( struct net80211_device *dev, + struct io_buffer *iobuf ); + + /** Poll for completed and received packets + * + * @v dev 802.11 device + * + * This method should cause the hardware to check for + * completed transmissions and received packets. Any received + * packets should be delivered via net80211_rx(), and + * completed transmissions should be indicated using + * net80211_tx_complete(). + * + * This method is guaranteed to be called only when the device + * is open. + */ + void ( * poll ) ( struct net80211_device *dev ); + + /** Enable or disable interrupts + * + * @v dev 802.11 device + * @v enable If TRUE, interrupts should be enabled + */ + void ( * irq ) ( struct net80211_device *dev, int enable ); + + /** Update hardware state to match 802.11 layer state + * + * @v dev 802.11 device + * @v changed Set of flags indicating what may have changed + * @ret rc Return status code + * + * This method should cause the hardware state to be + * reinitialized from the state indicated in fields of + * net80211_device, in the areas indicated by bits set in + * @a changed. If the hardware is unable to do so, this method + * may return an appropriate error indication. + * + * This method is guaranteed to be called only when the device + * is open. + */ + int ( * config ) ( struct net80211_device *dev, int changed ); +}; + +/** An 802.11 RF channel. */ +struct net80211_channel +{ + /** The band with which this channel is associated */ + u8 band; + + /** A channel number interpreted according to the band + * + * The 2.4GHz band uses channel numbers from 1-13 at 5MHz + * intervals such that channel 1 is 2407 MHz; channel 14, + * legal for use only in Japan, is defined separately as 2484 + * MHz. Adjacent channels will overlap, since 802.11 + * transmissions use a 20 MHz (4-channel) bandwidth. Most + * commonly, channels 1, 6, and 11 are used. + * + * The 5GHz band uses channel numbers derived directly from + * the frequency; channel 0 is 5000 MHz, and channels are + * always spaced 5 MHz apart. Channel numbers over 180 are + * relative to 4GHz instead of 5GHz, but these are rarely + * seen. Most channels are not legal for use. + */ + u8 channel_nr; + + /** The center frequency for this channel + * + * Currently a bandwidth of 20 MHz is assumed. + */ + u16 center_freq; + + /** Maximum allowable transmit power, in dBm + * + * This should be interpreted as EIRP, the power supplied to + * an ideal isotropic antenna in order to achieve the same + * average signal intensity as the real hardware at a + * particular distance. + * + * Currently no provision is made for directional antennas. + */ + u8 maxpower; +}; + +/** Information on the capabilities of an 802.11 hardware device + * + * In its probe callback, an 802.11 driver must read hardware + * registers to determine the appropriate contents of this structure, + * fill it, and pass it to net80211_register() so that the 802.11 + * layer knows how to treat the hardware and what to advertise as + * supported to access points. + */ +struct net80211_hw_info +{ + /** Default hardware MAC address. + * + * The user may change this by setting the @c netX/mac setting + * before the driver's open function is called; in that case + * the driver must set the hardware MAC address to the address + * contained in the wrapping net_device's ll_addr field, or if + * that is impossible, set that ll_addr field back to the + * unchangeable hardware MAC address. + */ + u8 hwaddr[ETH_ALEN]; + + /** A bitwise OR of the 802.11x modes supported by this device */ + int modes; + + /** A bitwise OR of the bands on which this device can communicate */ + int bands; + + /** A set of flags indicating peculiarities of this device. */ + enum { + /** Received frames include a frame check sequence. */ + NET80211_HW_RX_HAS_FCS = (1 << 1), + + /** Hardware doesn't support 2.4GHz short preambles + * + * This is only relevant for 802.11b operation above + * 2Mbps. All 802.11g devices support short preambles. + */ + NET80211_HW_NO_SHORT_PREAMBLE = (1 << 2), + + /** Hardware doesn't support 802.11g short slot operation */ + NET80211_HW_NO_SHORT_SLOT = (1 << 3), + } flags; + + /** Signal strength information that can be provided by the device + * + * Signal strength is passed to net80211_rx(), primarily to + * allow determination of the closest access point for a + * multi-AP network. The units are provided for completeness + * of status displays. + */ + enum { + /** No signal strength information supported */ + NET80211_SIGNAL_NONE = 0, + /** Signal strength in arbitrary units */ + NET80211_SIGNAL_ARBITRARY, + /** Signal strength in decibels relative to arbitrary base */ + NET80211_SIGNAL_DB, + /** Signal strength in decibels relative to 1mW */ + NET80211_SIGNAL_DBM, + } signal_type; + + /** Maximum signal in arbitrary cases + * + * If signal_type is NET80211_SIGNAL_ARBITRARY or + * NET80211_SIGNAL_DB, the driver should report it on a scale + * from 0 to signal_max. + */ + unsigned signal_max; + + /** List of transmission rates supported by the card + * + * Rates should be in 100kbps increments (e.g. 11 Mbps would + * be represented as the number 110). + */ + u16 supported_rates[NET80211_MAX_RATES]; + + /** Number of supported rates */ + int nr_supported_rates; + + /** Estimate of the time required to change channels, in microseconds + * + * If this is not known, a guess on the order of a few + * milliseconds (value of 1000-5000) is reasonable. + */ + unsigned channel_change_time; +}; + +/** Structure tracking received fragments for a packet + * + * We set up a fragment cache entry when we receive a packet marked as + * fragment 0 with the "more fragments" bit set in its frame control + * header. We are required by the 802.11 standard to track 3 + * fragmented packets arriving simultaneously; if we receive more we + * may drop some. Upon receipt of a new fragment-0 packet, if no entry + * is available or expired, we take over the most @e recent entry for + * the new packet, since we don't want to starve old entries from ever + * finishing at all. If we get a fragment after the zeroth with no + * cache entry for its packet, we drop it. + */ +struct net80211_frag_cache +{ + /** Whether this cache entry is in use */ + u8 in_use; + + /** Sequence number of this MSDU (packet) */ + u16 seqnr; + + /** Timestamp from point at which first fragment was collected */ + u32 start_ticks; + + /** Buffers for each fragment */ + struct io_buffer *iob[16]; +}; + +/** Interface to an 802.11 cryptographic algorithm + * + * Cryptographic algorithms define a net80211_crypto structure + * statically, using a gPXE linker table to make it available to the + * 802.11 layer. When the algorithm needs to be used, the 802.11 code + * will allocate a copy of the static definition plus whatever space + * the algorithm has requested for private state, and point + * net80211_device::crypto at it. + */ +struct net80211_crypto +{ + /** The cryptographic algorithm implemented */ + enum net80211_crypto_alg algorithm; + + /** Initialize cryptographic algorithm using a given key + * + * @v crypto 802.11 cryptographic algorithm + * @v key Pointer to key bytes + * @v keylen Number of key bytes + * @ret rc Return status code + * + * This method is passed the communication key provided by the + * security handshake handler, which will already be in the + * low-level form required. + */ + int ( * initialize ) ( struct net80211_crypto *crypto, u8 *key, + int keylen ); + + /** Encrypt a frame using the cryptographic algorithm + * + * @v crypto 802.11 cryptographic algorithm + * @v iob I/O buffer + * @ret eiob Newly allocated I/O buffer with encrypted packet + * + * This method is called to encrypt a single frame. It is + * guaranteed that initialize() will have completed + * successfully before this method is called. + * + * The frame passed already has an 802.11 header prepended, + * but the PROTECTED bit in the frame control field will not + * be set; this method is responsible for setting it. The + * returned I/O buffer should contain a complete copy of @a + * iob, including the 802.11 header, but with the PROTECTED + * bit set, the data encrypted, and whatever encryption + * headers/trailers are necessary added. + * + * This method should never free the passed I/O buffer. + * + * Return NULL if the packet could not be encrypted, due to + * memory limitations or otherwise. + */ + struct io_buffer * ( * encrypt ) ( struct net80211_crypto *crypto, + struct io_buffer *iob ); + + /** Decrypt a frame using the cryptographic algorithm + * + * @v crypto 802.11 cryptographic algorithm + * @v eiob Encrypted I/O buffer + * @ret iob Newly allocated I/O buffer with decrypted packet + * + * This method is called to decrypt a single frame. It is + * guaranteed that initialize() will have completed + * successfully before this method is called. + * + * Decryption follows the reverse of the pattern used for + * encryption: this method must copy the 802.11 header into + * the returned packet, decrypt the data stream, remove any + * encryption header or trailer, and clear the PROTECTED bit + * in the frame control header. + * + * This method should never free the passed I/O buffer. + * + * Return NULL if memory was not available for decryption, if + * a consistency or integrity check on the decrypted frame + * failed, or if the decrypted frame should not be processed + * by the network stack for any other reason. + */ + struct io_buffer * ( * decrypt ) ( struct net80211_crypto *crypto, + struct io_buffer *iob ); + + /** Length of private data requested to be allocated */ + int priv_len; + + /** Private data for the algorithm to store key and state info */ + void *priv; +}; + + +struct net80211_probe_ctx; +struct net80211_assoc_ctx; + + +/** Structure encapsulating the complete state of an 802.11 device + * + * An 802.11 device is always wrapped by a network device, and this + * network device is always pointed to by the @a netdev field. In + * general, operations should never be performed by 802.11 code using + * netdev functions directly. It is usually the case that the 802.11 + * layer might need to do some processing or bookkeeping on top of + * what the netdevice code will do. + */ +struct net80211_device +{ + /** The net_device that wraps us. */ + struct net_device *netdev; + + /** List of 802.11 devices. */ + struct list_head list; + + /** 802.11 device operations */ + struct net80211_device_operations *op; + + /** Driver private data */ + void *priv; + + /** Information about the hardware, provided to net80211_register() */ + struct net80211_hw_info *hw; + + /* ---------- Channel and rate fields ---------- */ + + /** A list of all possible channels we might use */ + struct net80211_channel channels[NET80211_MAX_CHANNELS]; + + /** The number of channels in the channels array */ + u8 nr_channels; + + /** The channel currently in use, as an index into the channels array */ + u8 channel; + + /** A list of all possible TX rates we might use + * + * Rates are in units of 100 kbps. + */ + u16 rates[NET80211_MAX_RATES]; + + /** The number of transmission rates in the rates array */ + u8 nr_rates; + + /** The rate currently in use, as an index into the rates array */ + u8 rate; + + /** The rate to use for RTS/CTS transmissions + * + * This is always the fastest basic rate that is not faster + * than the data rate in use. Also an index into the rates array. + */ + u8 rtscts_rate; + + /** Bitmask of basic rates + * + * If bit N is set in this value, with the LSB considered to + * be bit 0, then rate N in the rates array is a "basic" rate. + * + * We don't decide which rates are "basic"; our AP does, and + * we respect its wishes. We need to be able to identify basic + * rates in order to calculate the duration of a CTS packet + * used for 802.11 g/b interoperability. + */ + u32 basic_rates; + + /* ---------- Association fields ---------- */ + + /** The asynchronous association process. + * + * When an 802.11 netdev is opened, or when the user changes + * the SSID setting on an open 802.11 device, an + * autoassociation task is started by net80211_autoassocate() + * to associate with the new best network. The association is + * asynchronous, but no packets can be transmitted until it is + * complete. If it is successful, the wrapping net_device is + * set as "link up". If it fails, @c assoc_rc will be set with + * an error indication. + */ + struct process proc_assoc; + + /** Network with which we are associating + * + * This will be NULL when we are not actively in the process + * of associating with a network we have already successfully + * probed for. + */ + struct net80211_wlan *associating; + + /** Context for the association process + * + * This is a probe_ctx if the @c PROBED flag is not set in @c + * state, and an assoc_ctx otherwise. + */ + union { + struct net80211_probe_ctx *probe; + struct net80211_assoc_ctx *assoc; + } ctx; + + /** State of our association to the network + * + * Since the association process happens asynchronously, it's + * necessary to have some channel of communication so the + * driver can say "I got an association reply and we're OK" or + * similar. This variable provides that link. It is a bitmask + * of any of NET80211_PROBED, NET80211_AUTHENTICATED, + * NET80211_ASSOCIATED, NET80211_CRYPTO_SYNCED to indicate how + * far along in associating we are; NET80211_WORKING if the + * association task is running; and NET80211_WAITING if a + * packet has been sent that we're waiting for a reply to. We + * can only be crypto-synced if we're associated, we can + * only be associated if we're authenticated, we can only be + * authenticated if we've probed. + * + * If an association process fails (that is, we receive a + * packet with an error indication), the error code is copied + * into bits 6-0 of this variable and bit 7 is set to specify + * what type of error code it is. An AP can provide either a + * "status code" (0-51 are defined) explaining why it refused + * an association immediately, or a "reason code" (0-45 are + * defined) explaining why it canceled an association after it + * had originally OK'ed it. Status and reason codes serve + * similar functions, but they use separate error message + * tables. A gPXE-formatted return status code (negative) is + * placed in @c assoc_rc. + * + * If the failure to associate is indicated by a status code, + * the NET80211_IS_REASON bit will be clear; if it is + * indicated by a reason code, the bit will be set. If we were + * successful, both zero status and zero reason mean success, + * so there is no ambiguity. + * + * To prevent association when opening the device, user code + * can set the NET80211_NO_ASSOC bit. The final bit in this + * variable, NET80211_AUTO_SSID, is used to remember whether + * we picked our SSID through automated probing as opposed to + * user specification; the distinction becomes relevant in the + * settings applicator. + */ + u16 state; + + /** Return status code associated with @c state */ + int assoc_rc; + + /* ---------- Parameters of currently associated network ---------- */ + + /** 802.11 cryptographic algorithm for our current network + * + * For an open network, this will be set to NULL. + */ + struct net80211_crypto *crypto; + + /** MAC address of the access point most recently associated */ + u8 bssid[ETH_ALEN]; + + /** SSID of the access point we are or will be associated with + * + * Although the SSID field in 802.11 packets is generally not + * NUL-terminated, here and in net80211_wlan we add a NUL for + * convenience. + */ + char essid[IEEE80211_MAX_SSID_LEN+1]; + + /** Association ID given to us by the AP */ + u16 aid; + + /** TSFT value for last beacon received, microseconds */ + u64 last_beacon_timestamp; + + /** Time between AP sending beacons, microseconds */ + u32 tx_beacon_interval; + + /** Smoothed average time between beacons, microseconds */ + u32 rx_beacon_interval; + + /* ---------- Physical layer information ---------- */ + + /** Physical layer options + * + * These control the use of CTS protection, short preambles, + * and short-slot operation. + */ + int phy_flags; + + /** Signal strength of last received packet */ + int last_signal; + + /** Rate control state */ + struct rc80211_ctx *rctl; + + /* ---------- Packet handling state ---------- */ + + /** Fragment reassembly state */ + struct net80211_frag_cache frags[NET80211_NR_CONCURRENT_FRAGS]; + + /** The sequence number of the last packet we sent */ + u16 last_tx_seqnr; + + /** Packet duplication elimination state + * + * We are only required to handle immediate duplicates for + * each direct sender, and since we can only have one direct + * sender (the AP), we need only keep the sequence control + * field from the most recent packet we've received. Thus, + * this field stores the last sequence control field we've + * received for a packet from the AP. + */ + u16 last_rx_seq; + + /** RX management packet queue + * + * Sometimes we want to keep probe, beacon, and action packets + * that we receive, such as when we're scanning for networks. + * Ordinarily we drop them because they are sent at a large + * volume (ten beacons per second per AP, broadcast) and we + * have no need of them except when we're scanning. + * + * When keep_mgmt is TRUE, received probe, beacon, and action + * management packets will be stored in this queue. + */ + struct list_head mgmt_queue; + + /** RX management packet info queue + * + * We need to keep track of the signal strength for management + * packets we're keeping, because that provides the only way + * to distinguish between multiple APs for the same network. + * Since we can't extend io_buffer to store signal, this field + * heads a linked list of "RX packet info" structures that + * contain that signal strength field. Its entries always + * parallel the entries in mgmt_queue, because the two queues + * are always added to or removed from in parallel. + */ + struct list_head mgmt_info_queue; + + /** Whether to store management packets + * + * Received beacon, probe, and action packets will be added to + * mgmt_queue (and their signal strengths added to + * mgmt_info_queue) only when this variable is TRUE. It should + * be set by net80211_keep_mgmt() (which returns the old + * value) only when calling code is prepared to poll the + * management queue frequently, because packets will otherwise + * pile up and exhaust memory. + */ + int keep_mgmt; +}; + +/** Structure representing a probed network. + * + * This is returned from the net80211_probe_finish functions and + * passed to the low-level association functions. At least essid, + * bssid, channel, beacon, and security must be filled in if you want + * to build this structure manually. + */ +struct net80211_wlan +{ + /** The human-readable ESSID (network name) + * + * Although the 802.11 SSID field is generally not + * NUL-terminated, the gPXE code adds an extra NUL (and + * expects one in this structure) for convenience. + */ + char essid[IEEE80211_MAX_SSID_LEN+1]; + + /** MAC address of the strongest-signal access point for this ESSID */ + u8 bssid[ETH_ALEN]; + + /** Signal strength of beacon frame from that access point */ + int signal; + + /** The channel on which that access point communicates + * + * This is a raw channel number (net80211_channel::channel_nr), + * so that it will not be affected by reconfiguration of the + * device channels array. + */ + int channel; + + /** The complete beacon or probe-response frame received */ + struct io_buffer *beacon; + + /** Security handshaking method used on the network */ + enum net80211_security_proto handshaking; + + /** Cryptographic algorithm used on the network */ + enum net80211_crypto_alg crypto; + + /** Link to allow chaining multiple structures into a list to + be returned from net80211_probe_finish_all(). */ + struct list_head list; +}; + + +/** + * @defgroup net80211_probe 802.11 network location API + * @{ + */ +int net80211_prepare_probe ( struct net80211_device *dev, int band, + int active ); +struct net80211_probe_ctx * net80211_probe_start ( struct net80211_device *dev, + const char *essid, + int active ); +int net80211_probe_step ( struct net80211_probe_ctx *ctx ); +struct net80211_wlan * +net80211_probe_finish_best ( struct net80211_probe_ctx *ctx ); +struct list_head *net80211_probe_finish_all ( struct net80211_probe_ctx *ctx ); + +void net80211_free_wlan ( struct net80211_wlan *wlan ); +void net80211_free_wlanlist ( struct list_head *list ); +/** @} */ + + +/** + * @defgroup net80211_mgmt 802.11 network management API + * @{ + */ +struct net80211_device * net80211_get ( struct net_device *netdev ); +void net80211_autoassociate ( struct net80211_device *dev ); + +int net80211_change_channel ( struct net80211_device *dev, int channel ); +void net80211_set_rate_idx ( struct net80211_device *dev, int rate ); + +int net80211_keep_mgmt ( struct net80211_device *dev, int enable ); +struct io_buffer * net80211_mgmt_dequeue ( struct net80211_device *dev, + int *signal ); +int net80211_tx_mgmt ( struct net80211_device *dev, u16 fc, + u8 bssid[ETH_ALEN], struct io_buffer *iob ); +/** @} */ + + +/** + * @defgroup net80211_assoc 802.11 network association API + * @{ + */ +int net80211_prepare_assoc ( struct net80211_device *dev, + struct net80211_wlan *wlan ); +int net80211_send_auth ( struct net80211_device *dev, + struct net80211_wlan *wlan, int method ); +int net80211_send_assoc ( struct net80211_device *dev, + struct net80211_wlan *wlan ); +/** @} */ + + +/** + * @defgroup net80211_driver 802.11 driver interface API + * @{ + */ +struct net80211_device *net80211_alloc ( size_t priv_size ); +int net80211_register ( struct net80211_device *dev, + struct net80211_device_operations *ops, + struct net80211_hw_info *hw ); +void net80211_rx ( struct net80211_device *dev, struct io_buffer *iob, + int signal, u16 rate ); +void net80211_rx_err ( struct net80211_device *dev, + struct io_buffer *iob, int rc ); +void net80211_tx_complete ( struct net80211_device *dev, + struct io_buffer *iob, int retries, int rc ); +void net80211_unregister ( struct net80211_device *dev ); +void net80211_free ( struct net80211_device *dev ); +/** @} */ + + +#endif diff --git a/src/include/gpxe/rc80211.h b/src/include/gpxe/rc80211.h new file mode 100644 index 00000000..0856896c --- /dev/null +++ b/src/include/gpxe/rc80211.h @@ -0,0 +1,19 @@ +#ifndef _GPXE_RC80211_H +#define _GPXE_RC80211_H + +/** @file + * + * Rate-control algorithm prototype for 802.11. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +struct net80211_device; +struct rc80211_ctx; + +struct rc80211_ctx * rc80211_init ( struct net80211_device *dev ); +void rc80211_update_tx ( struct net80211_device *dev, int retries, int rc ); +void rc80211_update_rx ( struct net80211_device *dev, int retry, u16 rate ); +void rc80211_free ( struct rc80211_ctx *ctx ); + +#endif /* _GPXE_RC80211_H */ |