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Improved Doxygen documentation for RADIUS client code
This commit is contained in:
Jouni Malinen
parent
8d5aca73bb
commit
df1e24aceb
@ -1,6 +1,6 @@
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/*
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* hostapd / RADIUS client
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* Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
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* RADIUS client
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* Copyright (c) 2002-2009, 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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@ -20,18 +20,50 @@
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#include "eloop.h"
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/* Defaults for RADIUS retransmit values (exponential backoff) */
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#define RADIUS_CLIENT_FIRST_WAIT 3 /* seconds */
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#define RADIUS_CLIENT_MAX_WAIT 120 /* seconds */
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#define RADIUS_CLIENT_MAX_RETRIES 10 /* maximum number of retransmit attempts
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* before entry is removed from retransmit
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* list */
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#define RADIUS_CLIENT_MAX_ENTRIES 30 /* maximum number of entries in retransmit
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* list (oldest will be removed, if this
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* limit is exceeded) */
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#define RADIUS_CLIENT_NUM_FAILOVER 4 /* try to change RADIUS server after this
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* many failed retry attempts */
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/**
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* RADIUS_CLIENT_FIRST_WAIT - RADIUS client timeout for first retry in seconds
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*/
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#define RADIUS_CLIENT_FIRST_WAIT 3
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/**
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* RADIUS_CLIENT_MAX_WAIT - RADIUS client maximum retry timeout in seconds
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*/
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#define RADIUS_CLIENT_MAX_WAIT 120
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/**
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* RADIUS_CLIENT_MAX_RETRIES - RADIUS client maximum retries
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*
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* Maximum number of retransmit attempts before the entry is removed from
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* retransmit list.
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*/
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#define RADIUS_CLIENT_MAX_RETRIES 10
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/**
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* RADIUS_CLIENT_MAX_ENTRIES - RADIUS client maximum pending messages
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*
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* Maximum number of entries in retransmit list (oldest entries will be
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* removed, if this limit is exceeded).
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*/
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#define RADIUS_CLIENT_MAX_ENTRIES 30
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/**
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* RADIUS_CLIENT_NUM_FAILOVER - RADIUS client failover point
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*
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* The number of failed retry attempts after which the RADIUS server will be
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* changed (if one of more backup servers are configured).
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*/
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#define RADIUS_CLIENT_NUM_FAILOVER 4
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/**
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* struct radius_rx_handler - RADIUS client RX handler
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*
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* This data structure is used internally inside the RADIUS client module to
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* store registered RX handlers. These handlers are registered by calls to
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* radius_client_register() and unregistered when the RADIUS client is
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* deinitizlized with a call to radius_client_deinit().
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*/
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struct radius_rx_handler {
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RadiusRxResult (*handler)(struct radius_msg *msg,
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struct radius_msg *req,
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@ -42,7 +74,12 @@ struct radius_rx_handler {
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};
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/* RADIUS message retransmit list */
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/**
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* struct radius_msg_list - RADIUS client message retransmit list
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*
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* This data structure is used internally inside the RADIUS client module to
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* store pending RADIUS requests that may still need to be retransmitted.
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*/
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struct radius_msg_list {
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u8 addr[ETH_ALEN]; /* STA/client address; used to find RADIUS messages
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* for the same STA. */
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@ -63,16 +100,47 @@ struct radius_msg_list {
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};
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/**
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* struct radius_client_data - Internal RADIUS client data
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*
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* This data structure is used internally inside the RADIUS client module.
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* External users allocate this by calling radius_client_init() and free it by
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* calling radius_client_deinit(). The pointer to this opaque data is used in
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* calls to other functions as an identifier for the RADIUS client instance.
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*/
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struct radius_client_data {
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/**
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* ctx - Context pointer for hostapd_logger() callbacks
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*/
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void *ctx;
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/**
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* conf - RADIUS client configuration (list of RADIUS servers to use)
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*/
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struct hostapd_radius_servers *conf;
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int auth_serv_sock; /* socket for authentication RADIUS messages */
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int acct_serv_sock; /* socket for accounting RADIUS messages */
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/**
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* auth_serv_sock - Socket for authentication RADIUS messages
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*/
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int auth_serv_sock;
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/**
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* acct_serv_sock - Socket for accounting RADIUS messages
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*/
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int acct_serv_sock;
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int auth_serv_sock6;
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int acct_serv_sock6;
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int auth_sock; /* currently used socket */
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int acct_sock; /* currently used socket */
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/**
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* auth_sock - Current used socket for RADIUS authentication server
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*/
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int auth_sock;
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/**
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* acct_sock - Current used socket for RADIUS accounting server
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*/
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int acct_sock;
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struct radius_rx_handler *auth_handlers;
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size_t num_auth_handlers;
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@ -103,6 +171,22 @@ static void radius_client_msg_free(struct radius_msg_list *req)
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}
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/**
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* radius_client_register - Register a RADIUS client RX handler
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* @radius: RADIUS client context from radius_client_init()
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* @msg_type: RADIUS client type (RADIUS_AUTH or RADIUS_ACCT)
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* @handler: Handler for received RADIUS messages
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* @data: Context pointer for handler callbacks
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* Returns: 0 on success, -1 on failure
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*
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* This function is used to register a handler for processing received RADIUS
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* authentication and accounting messages. The handler() callback function will
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* be called whenever a RADIUS message is received from the active server.
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*
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* There can be multiple registered RADIUS message handlers. The handlers will
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* be called in order until one of them indicates that it has processed or
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* queued the message.
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*/
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int radius_client_register(struct radius_client_data *radius,
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RadiusType msg_type,
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RadiusRxResult (*handler)(struct radius_msg *msg,
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@ -437,6 +521,28 @@ static void radius_client_list_del(struct radius_client_data *radius,
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}
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/**
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* radius_client_send - Send a RADIUS request
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* @radius: RADIUS client context from radius_client_init()
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* @msg: RADIUS message to be sent
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* @msg_type: Message type (RADIUS_AUTH, RADIUS_ACCT, RADIUS_ACCT_INTERIM)
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* @addr: MAC address of the device related to this message or %NULL
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* Returns: 0 on success, -1 on failure
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*
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* This function is used to transmit a RADIUS authentication (RADIUS_AUTH) or
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* accounting request (RADIUS_ACCT or RADIUS_ACCT_INTERIM). The only difference
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* between accounting and interim accounting messages is that the interim
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* message will override any pending interim accounting updates while a new
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* accounting message does not remove any pending messages.
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*
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* The message is added on the retransmission queue and will be retransmitted
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* automatically until a response is received or maximum number of retries
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* (RADIUS_CLIENT_MAX_RETRIES) is reached.
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*
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* The related device MAC address can be used to identify pending messages that
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* can be removed with radius_client_flush_auth() or with interim accounting
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* updates.
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*/
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int radius_client_send(struct radius_client_data *radius,
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struct radius_msg *msg, RadiusType msg_type,
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const u8 *addr)
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@ -646,6 +752,14 @@ static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
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}
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/**
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* radius_client_get_id - Get an identifier for a new RADIUS message
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* @radius: RADIUS client context from radius_client_init()
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* Returns: Allocated identifier
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*
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* This function is used to fetch a unique (among pending requests) identifier
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* for a new RADIUS message.
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*/
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u8 radius_client_get_id(struct radius_client_data *radius)
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{
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struct radius_msg_list *entry, *prev, *_remove;
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@ -681,6 +795,11 @@ u8 radius_client_get_id(struct radius_client_data *radius)
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}
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/**
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* radius_client_flush - Flush all pending RADIUS client messages
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* @radius: RADIUS client context from radius_client_init()
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* @only_auth: Whether only authentication messages are removed
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*/
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void radius_client_flush(struct radius_client_data *radius, int only_auth)
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{
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struct radius_msg_list *entry, *prev, *tmp;
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@ -1037,6 +1156,16 @@ static int radius_client_init_acct(struct radius_client_data *radius)
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}
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/**
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* radius_client_init - Initialize RADIUS client
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* @ctx: Callback context to be used in hostapd_logger() calls
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* @conf: RADIUS client configuration (RADIUS servers)
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* Returns: Pointer to private RADIUS client context or %NULL on failure
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*
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* The caller is responsible for keeping the configuration data available for
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* the lifetime of the RADIUS client, i.e., until radius_client_deinit() is
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* called for the returned context pointer.
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*/
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struct radius_client_data *
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radius_client_init(void *ctx, struct hostapd_radius_servers *conf)
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{
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@ -1071,6 +1200,10 @@ radius_client_init(void *ctx, struct hostapd_radius_servers *conf)
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}
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/**
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* radius_client_deinit - Deinitialize RADIUS client
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* @radius: RADIUS client context from radius_client_init()
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*/
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void radius_client_deinit(struct radius_client_data *radius)
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{
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if (!radius)
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@ -1090,7 +1223,18 @@ void radius_client_deinit(struct radius_client_data *radius)
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}
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void radius_client_flush_auth(struct radius_client_data *radius, u8 *addr)
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/**
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* radius_client_flush_auth - Flush pending RADIUS messages for an address
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* @radius: RADIUS client context from radius_client_init()
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* @addr: MAC address of the related device
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*
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* This function can be used to remove pending RADIUS authentication messages
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* that are related to a specific device. The addr parameter is matched with
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* the one used in radius_client_send() call that was used to transmit the
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* authentication request.
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*/
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void radius_client_flush_auth(struct radius_client_data *radius,
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const u8 *addr)
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{
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struct radius_msg_list *entry, *prev, *tmp;
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@ -1218,6 +1362,13 @@ static int radius_client_dump_acct_server(char *buf, size_t buflen,
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}
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/**
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* radius_client_get_mib - Get RADIUS client MIB information
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* @radius: RADIUS client context from radius_client_init()
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* @buf: Buffer for returning MIB data in text format
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* @buflen: Maximum buf length in octets
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* Returns: Number of octets written into the buffer
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*/
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int radius_client_get_mib(struct radius_client_data *radius, char *buf,
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size_t buflen)
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{
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@ -1269,6 +1420,23 @@ static int radius_servers_diff(struct hostapd_radius_server *nserv,
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}
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/**
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* radius_client_reconfig - Reconfigure RADIUS client
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* @old: RADIUS client context from radius_client_init()
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* @ctx: Callback context to be used in hostapd_logger() calls
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* @oldconf: Old RADIUS client configuration (RADIUS servers)
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* @newconf: New RADIUS client configuration (RADIUS servers)
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* Returns: Pointer to private RADIUS client context or %NULL on failure
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*
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* This function can be used to conditionally change RADIUS client
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* configuration. If newconf differs from oldconf, the old RADIUS client
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* context is deinitialized and new one is allocated. If there is no change in
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* the configuration, the old RADIUS client context will be returned.
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*
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* The caller is responsible for keeping the new configuration data available
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* for the lifetime of the RADIUS client, i.e., until radius_client_deinit() is
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* called for the returned context pointer.
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*/
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struct radius_client_data *
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radius_client_reconfig(struct radius_client_data *old, void *ctx,
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struct hostapd_radius_servers *oldconf,
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@ -1,6 +1,6 @@
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/*
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* hostapd / RADIUS client
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* Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
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* RADIUS client
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* Copyright (c) 2002-2009, 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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@ -19,59 +19,204 @@
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struct radius_msg;
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/**
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* struct hostapd_radius_server - RADIUS server information for RADIUS client
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*
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* This structure contains information about a RADIUS server. The values are
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* mainly for MIB information. The MIB variable prefix (radiusAuth or
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* radiusAcc) depends on whether this is an authentication or accounting
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* server.
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*
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* radiusAuthClientPendingRequests (or radiusAccClientPendingRequests) is the
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* length of hapd->radius->msgs for matching msg_type.
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*/
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struct hostapd_radius_server {
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/* MIB prefix for shared variables:
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* @ = radiusAuth or radiusAcc depending on the type of the server */
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struct hostapd_ip_addr addr; /* @ServerAddress */
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int port; /* @ClientServerPortNumber */
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/**
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* addr - radiusAuthServerAddress or radiusAccServerAddress
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*/
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struct hostapd_ip_addr addr;
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/**
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* port - radiusAuthClientServerPortNumber or radiusAccClientServerPortNumber
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*/
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int port;
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/**
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* shared_secret - Shared secret for authenticating RADIUS messages
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*/
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u8 *shared_secret;
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/**
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* shared_secret_len - Length of shared_secret in octets
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*/
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size_t shared_secret_len;
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/* Dynamic (not from configuration file) MIB data */
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int index; /* @ServerIndex */
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int round_trip_time; /* @ClientRoundTripTime; in hundredths of a
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* second */
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u32 requests; /* @Client{Access,}Requests */
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u32 retransmissions; /* @Client{Access,}Retransmissions */
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u32 access_accepts; /* radiusAuthClientAccessAccepts */
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u32 access_rejects; /* radiusAuthClientAccessRejects */
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u32 access_challenges; /* radiusAuthClientAccessChallenges */
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u32 responses; /* radiusAccClientResponses */
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u32 malformed_responses; /* @ClientMalformed{Access,}Responses */
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u32 bad_authenticators; /* @ClientBadAuthenticators */
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u32 timeouts; /* @ClientTimeouts */
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u32 unknown_types; /* @ClientUnknownTypes */
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u32 packets_dropped; /* @ClientPacketsDropped */
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/* @ClientPendingRequests: length of hapd->radius->msgs for matching
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* msg_type */
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/**
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* index - radiusAuthServerIndex or radiusAccServerIndex
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*/
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int index;
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/**
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* round_trip_time - radiusAuthClientRoundTripTime or radiusAccClientRoundTripTime
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* Round-trip time in hundredths of a second.
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*/
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int round_trip_time;
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/**
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* requests - radiusAuthClientAccessRequests or radiusAccClientRequests
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*/
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u32 requests;
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/**
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* retransmissions - radiusAuthClientAccessRetransmissions or radiusAccClientRetransmissions
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*/
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u32 retransmissions;
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/**
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* access_accepts - radiusAuthClientAccessAccepts
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*/
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u32 access_accepts;
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/**
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* access_rejects - radiusAuthClientAccessRejects
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*/
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u32 access_rejects;
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/**
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* access_challenges - radiusAuthClientAccessChallenges
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*/
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u32 access_challenges;
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/**
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* responses - radiusAccClientResponses
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*/
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u32 responses;
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/**
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* malformed_responses - radiusAuthClientMalformedAccessResponses or radiusAccClientMalformedResponses
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*/
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u32 malformed_responses;
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/**
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* bad_authenticators - radiusAuthClientBadAuthenticators or radiusAccClientBadAuthenticators
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*/
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u32 bad_authenticators;
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/**
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* timeouts - radiusAuthClientTimeouts or radiusAccClientTimeouts
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*/
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u32 timeouts;
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/**
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* unknown_types - radiusAuthClientUnknownTypes or radiusAccClientUnknownTypes
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*/
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u32 unknown_types;
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/**
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* packets_dropped - radiusAuthClientPacketsDropped or radiusAccClientPacketsDropped
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*/
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u32 packets_dropped;
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};
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/**
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* struct hostapd_radius_servers - RADIUS servers for RADIUS client
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*/
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struct hostapd_radius_servers {
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/* RADIUS Authentication and Accounting servers in priority order */
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struct hostapd_radius_server *auth_servers, *auth_server;
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/**
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* auth_servers - RADIUS Authentication servers in priority order
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*/
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struct hostapd_radius_server *auth_servers;
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/**
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* num_auth_servers - Number of auth_servers entries
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*/
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int num_auth_servers;
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struct hostapd_radius_server *acct_servers, *acct_server;
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/**
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* auth_server - The current Authentication server
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*/
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struct hostapd_radius_server *auth_server;
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/**
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* acct_servers - RADIUS Accounting servers in priority order
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*/
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struct hostapd_radius_server *acct_servers;
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/**
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* num_acct_servers - Number of acct_servers entries
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*/
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int num_acct_servers;
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/**
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* acct_server - The current Accounting server
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*/
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||||
struct hostapd_radius_server *acct_server;
|
||||
|
||||
/**
|
||||
* retry_primary_interval - Retry interval for trying primary server
|
||||
*
|
||||
* This specifies a retry interval in sexconds for trying to return to
|
||||
* the primary RADIUS server. RADIUS client code will automatically try
|
||||
* to use the next server when the current server is not replying to
|
||||
* requests. If this interval is set (non-zero), the primary server
|
||||
* will be retried after the specified number of seconds has passed
|
||||
* even if the current used secondary server is still working.
|
||||
*/
|
||||
int retry_primary_interval;
|
||||
|
||||
/**
|
||||
* acct_interim_interval - Interim accounting update interval
|
||||
*
|
||||
* This parameter is not used inside RADIUS client code.
|
||||
*/
|
||||
int acct_interim_interval;
|
||||
|
||||
/**
|
||||
* msg_dumps - Whether RADIUS message details are shown in stdout
|
||||
*/
|
||||
int msg_dumps;
|
||||
|
||||
/**
|
||||
* client_addr - Client (local) address to use if force_client_addr
|
||||
*/
|
||||
struct hostapd_ip_addr client_addr;
|
||||
|
||||
/**
|
||||
* force_client_addr - Whether to force client (local) address
|
||||
*/
|
||||
int force_client_addr;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* RadiusType - RADIUS server type for RADIUS client
|
||||
*/
|
||||
typedef enum {
|
||||
/**
|
||||
* RADIUS authentication
|
||||
*/
|
||||
RADIUS_AUTH,
|
||||
|
||||
/**
|
||||
* RADIUS_ACCT - RADIUS accounting
|
||||
*/
|
||||
RADIUS_ACCT,
|
||||
RADIUS_ACCT_INTERIM /* used only with radius_client_send(); just like
|
||||
* RADIUS_ACCT, but removes any pending interim
|
||||
* RADIUS Accounting packages for the same STA
|
||||
* before sending the new interim update */
|
||||
|
||||
/**
|
||||
* RADIUS_ACCT_INTERIM - RADIUS interim accounting message
|
||||
*
|
||||
* Used only with radius_client_send(). This behaves just like
|
||||
* RADIUS_ACCT, but removes any pending interim RADIUS Accounting
|
||||
* messages for the same STA before sending the new interim update.
|
||||
*/
|
||||
RADIUS_ACCT_INTERIM
|
||||
} RadiusType;
|
||||
|
||||
/**
|
||||
* RadiusRxResult - RADIUS client RX handler result
|
||||
*/
|
||||
typedef enum {
|
||||
RADIUS_RX_PROCESSED,
|
||||
RADIUS_RX_QUEUED,
|
||||
@ -110,7 +255,7 @@ static inline void radius_client_deinit(struct radius_client_data *radius)
|
||||
}
|
||||
|
||||
static inline void radius_client_flush_auth(struct radius_client_data *radius,
|
||||
u8 *addr)
|
||||
const u8 *addr)
|
||||
{
|
||||
}
|
||||
|
||||
@ -124,7 +269,8 @@ void radius_client_flush(struct radius_client_data *radius, int only_auth);
|
||||
struct radius_client_data *
|
||||
radius_client_init(void *ctx, struct hostapd_radius_servers *conf);
|
||||
void radius_client_deinit(struct radius_client_data *radius);
|
||||
void radius_client_flush_auth(struct radius_client_data *radius, u8 *addr);
|
||||
void radius_client_flush_auth(struct radius_client_data *radius,
|
||||
const u8 *addr);
|
||||
int radius_client_get_mib(struct radius_client_data *radius, char *buf,
|
||||
size_t buflen);
|
||||
#endif /* CONFIG_NO_RADIUS */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user