60b94c9819
This allows background scanning and roaming decisions to be contained in
a single place based on a defined set of notification events which will
hopefully make it easier to experiment with roaming improvements. In
addition, this allows multiple intra-ESS roaming policies to be used
(each network configuration block can configure its own bgscan module).
The beacon loss and signal strength notifications are implemented for
the bgscan API, but the actual events are not yet available from the
driver.
The included sample bgscan module ("simple") is an example of what can
be done with the new bgscan mechanism. It requests periodic background
scans when the device remains associated with an ESS and has couple of
notes on what a more advanced bgscan module could do to optimize
background scanning and roaming. The periodic scans will cause the scan
result handler to pick a better AP if one becomes available. This bgscan
module can be taken into use by adding bgscan="simple" (or
bgscan="simple:<bgscan interval in seconds>") into the network
configuration block.
364 lines
10 KiB
C
364 lines
10 KiB
C
/*
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* WPA Supplicant / Network configuration structures
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* Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef CONFIG_SSID_H
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#define CONFIG_SSID_H
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#include "defs.h"
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#include "eap_peer/eap_config.h"
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#define MAX_SSID_LEN 32
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#define DEFAULT_EAP_WORKAROUND ((unsigned int) -1)
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#define DEFAULT_EAPOL_FLAGS (EAPOL_FLAG_REQUIRE_KEY_UNICAST | \
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EAPOL_FLAG_REQUIRE_KEY_BROADCAST)
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#define DEFAULT_PROTO (WPA_PROTO_WPA | WPA_PROTO_RSN)
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#define DEFAULT_KEY_MGMT (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X)
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#define DEFAULT_PAIRWISE (WPA_CIPHER_CCMP | WPA_CIPHER_TKIP)
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#define DEFAULT_GROUP (WPA_CIPHER_CCMP | WPA_CIPHER_TKIP | \
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WPA_CIPHER_WEP104 | WPA_CIPHER_WEP40)
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#define DEFAULT_FRAGMENT_SIZE 1398
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/**
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* struct wpa_ssid - Network configuration data
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*
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* This structure includes all the configuration variables for a network. This
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* data is included in the per-interface configuration data as an element of
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* the network list, struct wpa_config::ssid. Each network block in the
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* configuration is mapped to a struct wpa_ssid instance.
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*/
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struct wpa_ssid {
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/**
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* next - Next network in global list
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*
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* This pointer can be used to iterate over all networks. The head of
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* this list is stored in the ssid field of struct wpa_config.
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*/
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struct wpa_ssid *next;
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/**
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* pnext - Next network in per-priority list
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*
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* This pointer can be used to iterate over all networks in the same
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* priority class. The heads of these list are stored in the pssid
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* fields of struct wpa_config.
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*/
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struct wpa_ssid *pnext;
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/**
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* id - Unique id for the network
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*
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* This identifier is used as a unique identifier for each network
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* block when using the control interface. Each network is allocated an
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* id when it is being created, either when reading the configuration
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* file or when a new network is added through the control interface.
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*/
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int id;
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/**
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* priority - Priority group
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*
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* By default, all networks will get same priority group (0). If some
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* of the networks are more desirable, this field can be used to change
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* the order in which wpa_supplicant goes through the networks when
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* selecting a BSS. The priority groups will be iterated in decreasing
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* priority (i.e., the larger the priority value, the sooner the
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* network is matched against the scan results). Within each priority
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* group, networks will be selected based on security policy, signal
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* strength, etc.
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*
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* Please note that AP scanning with scan_ssid=1 and ap_scan=2 mode are
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* not using this priority to select the order for scanning. Instead,
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* they try the networks in the order that used in the configuration
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* file.
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*/
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int priority;
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/**
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* ssid - Service set identifier (network name)
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*
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* This is the SSID for the network. For wireless interfaces, this is
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* used to select which network will be used. If set to %NULL (or
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* ssid_len=0), any SSID can be used. For wired interfaces, this must
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* be set to %NULL. Note: SSID may contain any characters, even nul
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* (ASCII 0) and as such, this should not be assumed to be a nul
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* terminated string. ssid_len defines how many characters are valid
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* and the ssid field is not guaranteed to be nul terminated.
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*/
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u8 *ssid;
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/**
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* ssid_len - Length of the SSID
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*/
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size_t ssid_len;
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/**
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* bssid - BSSID
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*
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* If set, this network block is used only when associating with the AP
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* using the configured BSSID
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*/
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u8 bssid[ETH_ALEN];
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/**
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* bssid_set - Whether BSSID is configured for this network
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*/
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int bssid_set;
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/**
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* psk - WPA pre-shared key (256 bits)
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*/
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u8 psk[32];
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/**
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* psk_set - Whether PSK field is configured
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*/
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int psk_set;
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/**
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* passphrase - WPA ASCII passphrase
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*
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* If this is set, psk will be generated using the SSID and passphrase
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* configured for the network. ASCII passphrase must be between 8 and
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* 63 characters (inclusive).
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*/
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char *passphrase;
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/**
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* pairwise_cipher - Bitfield of allowed pairwise ciphers, WPA_CIPHER_*
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*/
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int pairwise_cipher;
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/**
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* group_cipher - Bitfield of allowed group ciphers, WPA_CIPHER_*
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*/
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int group_cipher;
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/**
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* key_mgmt - Bitfield of allowed key management protocols
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*
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* WPA_KEY_MGMT_*
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*/
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int key_mgmt;
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/**
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* proto - Bitfield of allowed protocols, WPA_PROTO_*
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*/
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int proto;
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/**
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* auth_alg - Bitfield of allowed authentication algorithms
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*
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* WPA_AUTH_ALG_*
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*/
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int auth_alg;
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/**
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* scan_ssid - Scan this SSID with Probe Requests
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*
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* scan_ssid can be used to scan for APs using hidden SSIDs.
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* Note: Many drivers do not support this. ap_mode=2 can be used with
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* such drivers to use hidden SSIDs.
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*/
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int scan_ssid;
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#ifdef IEEE8021X_EAPOL
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#define EAPOL_FLAG_REQUIRE_KEY_UNICAST BIT(0)
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#define EAPOL_FLAG_REQUIRE_KEY_BROADCAST BIT(1)
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/**
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* eapol_flags - Bit field of IEEE 802.1X/EAPOL options (EAPOL_FLAG_*)
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*/
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int eapol_flags;
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/**
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* eap - EAP peer configuration for this network
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*/
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struct eap_peer_config eap;
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#endif /* IEEE8021X_EAPOL */
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#define NUM_WEP_KEYS 4
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#define MAX_WEP_KEY_LEN 16
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/**
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* wep_key - WEP keys
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*/
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u8 wep_key[NUM_WEP_KEYS][MAX_WEP_KEY_LEN];
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/**
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* wep_key_len - WEP key lengths
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*/
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size_t wep_key_len[NUM_WEP_KEYS];
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/**
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* wep_tx_keyidx - Default key index for TX frames using WEP
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*/
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int wep_tx_keyidx;
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/**
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* proactive_key_caching - Enable proactive key caching
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*
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* This field can be used to enable proactive key caching which is also
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* known as opportunistic PMKSA caching for WPA2. This is disabled (0)
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* by default. Enable by setting this to 1.
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*
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* Proactive key caching is used to make supplicant assume that the APs
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* are using the same PMK and generate PMKSA cache entries without
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* doing RSN pre-authentication. This requires support from the AP side
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* and is normally used with wireless switches that co-locate the
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* authenticator.
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*/
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int proactive_key_caching;
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/**
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* mixed_cell - Whether mixed cells are allowed
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*
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* This option can be used to configure whether so called mixed cells,
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* i.e., networks that use both plaintext and encryption in the same
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* SSID, are allowed. This is disabled (0) by default. Enable by
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* setting this to 1.
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*/
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int mixed_cell;
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#ifdef IEEE8021X_EAPOL
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/**
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* leap - Number of EAP methods using LEAP
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*
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* This field should be set to 1 if LEAP is enabled. This is used to
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* select IEEE 802.11 authentication algorithm.
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*/
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int leap;
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/**
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* non_leap - Number of EAP methods not using LEAP
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*
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* This field should be set to >0 if any EAP method other than LEAP is
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* enabled. This is used to select IEEE 802.11 authentication
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* algorithm.
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*/
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int non_leap;
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/**
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* eap_workaround - EAP workarounds enabled
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*
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* wpa_supplicant supports number of "EAP workarounds" to work around
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* interoperability issues with incorrectly behaving authentication
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* servers. This is recommended to be enabled by default because some
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* of the issues are present in large number of authentication servers.
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*
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* Strict EAP conformance mode can be configured by disabling
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* workarounds with eap_workaround = 0.
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*/
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unsigned int eap_workaround;
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#endif /* IEEE8021X_EAPOL */
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/**
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* mode - IEEE 802.11 operation mode (Infrastucture/IBSS)
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*
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* 0 = infrastructure (Managed) mode, i.e., associate with an AP.
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*
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* 1 = IBSS (ad-hoc, peer-to-peer)
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*
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* 2 = AP (access point)
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*
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* Note: IBSS can only be used with key_mgmt NONE (plaintext and
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* static WEP) and key_mgmt=WPA-NONE (fixed group key TKIP/CCMP). In
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* addition, ap_scan has to be set to 2 for IBSS. WPA-None requires
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* following network block options: proto=WPA, key_mgmt=WPA-NONE,
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* pairwise=NONE, group=TKIP (or CCMP, but not both), and psk must also
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* be set (either directly or using ASCII passphrase).
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*/
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int mode;
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/**
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* disabled - Whether this network is currently disabled
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*
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* 0 = this network can be used (default).
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* 1 = this network block is disabled (can be enabled through
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* ctrl_iface, e.g., with wpa_cli or wpa_gui).
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*/
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int disabled;
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/**
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* peerkey - Whether PeerKey handshake for direct links is allowed
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*
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* This is only used when both RSN/WPA2 and IEEE 802.11e (QoS) are
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* enabled.
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*
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* 0 = disabled (default)
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* 1 = enabled
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*/
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int peerkey;
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/**
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* id_str - Network identifier string for external scripts
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*
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* This value is passed to external ctrl_iface monitors in
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* WPA_EVENT_CONNECTED event and wpa_cli sets this as WPA_ID_STR
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* environment variable for action scripts.
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*/
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char *id_str;
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#ifdef CONFIG_IEEE80211W
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/**
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* ieee80211w - Whether management frame protection is enabled
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*
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* This value is used to configure policy for management frame
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* protection (IEEE 802.11w). 0 = disabled, 1 = optional, 2 = required.
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*/
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enum mfp_options ieee80211w;
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#endif /* CONFIG_IEEE80211W */
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/**
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* frequency - Channel frequency in megahertz (MHz) for IBSS
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*
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* This value is used to configure the initial channel for IBSS (adhoc)
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* networks, e.g., 2412 = IEEE 802.11b/g channel 1. It is ignored in
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* the infrastructure mode. In addition, this value is only used by the
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* station that creates the IBSS. If an IBSS network with the
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* configured SSID is already present, the frequency of the network
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* will be used instead of this configured value.
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*/
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int frequency;
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/**
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* wpa_ptk_rekey - Maximum lifetime for PTK in seconds
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*
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* This value can be used to enforce rekeying of PTK to mitigate some
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* attacks against TKIP deficiencies.
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*/
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int wpa_ptk_rekey;
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/**
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* scan_freq - Array of frequencies to scan or %NULL for all
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*
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* This is an optional zero-terminated array of frequencies in
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* megahertz (MHz) to include in scan requests when searching for this
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* network. This can be used to speed up scanning when the network is
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* known to not use all possible channels.
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*/
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int *scan_freq;
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/**
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* bgscan - Background scan and roaming parameters or %NULL if none
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*
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* This is an optional set of parameters for background scanning and
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* roaming within a network (ESS) in following format:
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* <bgscan module name>:<module parameters>
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*/
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char *bgscan;
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};
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#endif /* CONFIG_SSID_H */
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