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The way autolink support is implementing in Doxygen is a bit inconvenient with wpa_supplicant being recognized as something that would always be linked to struct wpa_supplicant. In addition, number of links were not really noticed automatically. To get this working more robustly and without having to use the %wpa_supplicant workaround (which had its own issues, e.g., with titles), disable autolinking and use explicit \ref commands instead. This is also updating some of the obsolete notes to point to correct file names, etc. changes in the source code tree. Signed-off-by: Jouni Malinen <j@w1.fi>
57 lines
2.8 KiB
Plaintext
57 lines
2.8 KiB
Plaintext
/**
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\page eap_server_module EAP server implementation
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Extensible Authentication Protocol (EAP) is an authentication framework
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defined in RFC 3748. hostapd uses a separate code module for EAP server
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implementation. This module was designed to use only a minimal set of
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direct function calls (mainly, to debug/event functions) in order for
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it to be usable in other programs. The design of the EAP
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implementation is based loosely on RFC 4137. The state machine is
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defined in this RFC and so is the interface between the server state
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machine and methods. As such, this RFC provides useful information for
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understanding the EAP server implementation in hostapd.
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Some of the terminology used in EAP state machine is referring to
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EAPOL (IEEE 802.1X), but there is no strict requirement on the lower
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layer being IEEE 802.1X if EAP module is built for other programs than
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wpa_supplicant. These terms should be understood to refer to the
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lower layer as defined in RFC 4137.
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\section adding_eap_methods Adding EAP methods
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Each EAP method is implemented as a separate module, usually as one C
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file named eap_server_<name of the method>.c, e.g., \ref eap_server_md5.c. All EAP
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methods use the same interface between the server state machine and
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method specific functions. This allows new EAP methods to be added
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without modifying the core EAP state machine implementation.
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New EAP methods need to be registered by adding them into the build
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(Makefile) and the EAP method registration list in the
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\ref eap_server_register_methods() function of \ref eap_server_methods.c. Each EAP
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method should use a build-time configuration option, e.g., EAP_TLS, in
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order to make it possible to select which of the methods are included
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in the build.
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EAP methods must implement the interface defined in \ref eap_i.h. struct
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\ref eap_method defines the needed function pointers that each EAP method
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must provide. In addition, the EAP type and name are registered using
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this structure. This interface is based on section 4.4 of RFC 4137.
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It is recommended that the EAP methods would use generic helper
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functions, \ref eap_msg_alloc() and \ref eap_hdr_validate() when processing
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messages. This allows code sharing and can avoid missing some of the
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needed validation steps for received packets. In addition, these
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functions make it easier to change between expanded and legacy EAP
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header, if needed.
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When adding an EAP method that uses a vendor specific EAP type
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(Expanded Type as defined in RFC 3748, Chapter 5.7), the new method
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must be registered by passing vendor id instead of EAP_VENDOR_IETF to
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\ref eap_server_method_alloc(). These methods must not try to emulate
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expanded types by registering a legacy EAP method for type 254. See
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\ref eap_server_vendor_test.c for an example of an EAP method implementation that
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is implemented as an expanded type.
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*/
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