author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Feb 2010 22:53:42 +0200 | |
branch | RCL_3 |
changeset 7 | 7b8801c4c2d9 |
parent 2 | 1c7bc153c08e |
child 26 | 9abfd4f00d37 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001-2006 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: EAP and WLAN authentication protocols. |
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* |
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*/ |
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/* |
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* %version: 7 % |
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*/ |
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#if !defined(_EAP_BUFFER_H_) |
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#define _EAP_BUFFER_H_ |
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#include "eap_am_assert.h" |
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#include "eap_variable_data.h" |
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//-------------------------------------------------- |
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const u32_t EAP_MAX_LOCAL_PACKET_BUFFER_LENGTH = 1514; |
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const u8_t EAP_MEM_GUARD_BYTE = 0x55; |
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#if defined(_DEBUG) && defined(USE_EAP_MEM_GUARD) |
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const u32_t EAP_MEM_GUARD_LENGTH = 256u; |
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#define EAP_MEM_GUARDS(buffer_size) \ |
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(EAP_MEM_GUARD_LENGTH+(buffer_size)+EAP_MEM_GUARD_LENGTH) |
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#else |
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const u32_t EAP_MEM_GUARD_LENGTH = 0u; |
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#define EAP_MEM_GUARDS(buffer_size) (buffer_size) |
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#endif //#if defined(_DEBUG) && defined(USE_EAP_MEM_GUARD) |
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enum eap_write_buffer_e |
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{ |
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eap_write_buffer |
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}; |
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enum eap_read_buffer_e |
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{ |
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eap_read_buffer |
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}; |
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enum eap_random_error_type |
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{ |
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eap_random_error_type_manipulate_byte = 0, |
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eap_random_error_type_change_packet_length_longer, |
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eap_random_error_type_change_packet_length_shorter, |
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eap_random_error_type_none_keep_this_last_case, |
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}; |
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//-------------------------------------------------- |
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class abs_eap_am_tools_c; |
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class eapol_ethernet_header_wr_c; |
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class eapol_ethernet_header_rd_c; |
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/// Network packets are handled through eap_buf_chain_base_c class. |
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class EAP_EXPORT eap_buf_chain_base_c |
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{ |
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private: |
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//-------------------------------------------------- |
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/// This is pointer to the tools class. |
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abs_eap_am_tools_c * const m_am_tools; |
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/// This struct decreases the memory print of eap_buf_chain_base_c. |
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struct eap_buf_chain_base_impl_str |
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{ |
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/// This is the count of guard bytes allocated before and after the buffer. |
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u32_t m_mem_guard_length; |
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eap_variable_data_c * m_buffer; |
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/// This is pointer to the next buffer. NOTE this is NOT used in current version. |
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eap_buf_chain_base_c *m_next_buffer; |
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/// This is used to test protocol with manipulated packets. This is used in testing. |
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eap_random_error_type m_random_error_type; |
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/// This is used to test protocol with manipulated packets. This is used in testing. |
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u32_t m_send_packet_index; |
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/// This the pointer of sender stack. |
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/// This is used in testing. |
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const void *m_stack_address; |
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/// This indicates the buffer is initialized. |
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bool m_is_valid; |
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/// This is used to mark packet if it is manipulated. This is used in testing. |
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bool m_is_manipulated; |
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/// When this parameter is true eap_core_c activates re-transmission of this packet. |
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/// When this parameter is false eap_core_c does not activate re-transmission of this packet. |
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bool m_do_packet_retransmission; |
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/// This is tells whether the sender is client or server. |
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/// This is used in testing. |
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bool m_is_client; |
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/// This is used in testing. |
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bool m_do_length_checks; |
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/// This flag tells whether this packet must be encrypted (true) or not (false). |
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/// Encryption means the WLAN data encryption on the air (WEP, TKIP or CCMP). |
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/// Using this flag to tell the encryption allows the configuration of the |
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/// temporal key beforehand the key is used. |
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/// This is optimization to fasten the key configuration. |
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bool m_encrypt; |
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}; |
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/// This is pointer to data of eap_buf_chain_base_c. |
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/// This decreases memory print of eap_buf_chain_base_c. |
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/// This decreases stack usage of EAP_Core. |
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eap_buf_chain_base_impl_str * m_data; |
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//-------------------------------------------------- |
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/** |
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* This function initializes the eap_buf_chain_base_c object. |
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*/ |
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EAP_FUNC_IMPORT eap_status_e initialize( |
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const u32_t mem_guard_length); |
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/** |
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* Forses the inheritance. |
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*/ |
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EAP_FUNC_IMPORT virtual void force_inheritance() = 0; |
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/** |
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* Function checks the memory guard bytes. |
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*/ |
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EAP_FUNC_IMPORT bool check_guard_bytes(const u8_t * const guard) const; |
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/** |
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* Function sets the memory guard bytes. |
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*/ |
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EAP_FUNC_IMPORT void set_mem_guard_bytes(); |
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/** |
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* Function zeroes the data buffer. |
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*/ |
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EAP_FUNC_IMPORT void reset_data_buffer(); |
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//-------------------------------------------------- |
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protected: |
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//-------------------------------------------------- |
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/** |
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* @return Returns pointer to the tools object. |
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*/ |
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EAP_FUNC_IMPORT abs_eap_am_tools_c * get_am_tools(); |
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//-------------------------------------------------- |
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public: |
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//-------------------------------------------------- |
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/** |
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* Function checks the all memory guard bytes. |
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*/ |
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EAP_FUNC_IMPORT bool check_guards() const; |
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/** |
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* The destructor of the eap_buf_chain_base_c class checks memory guards |
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* and frees the allocated buffer. |
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*/ |
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EAP_FUNC_IMPORT virtual ~eap_buf_chain_base_c(); |
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|
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/** |
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* The constructor of the eap_buf_chain_wr class initializes attributes using |
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* the parameters passes to it. |
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* @param eap_write_buffer_e separates the write and read-only constructors. |
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* @param tools parameter is pointer to the tools class. |
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* @param data is pointer to the buffer containing the message. |
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* @param data_length parameter is count of bytes in the buffer. |
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* @param reset_data parameter indicates whether the data bytes must be set zero. |
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* @param free_buffer parameter indicates whether the destructor must free the data buffer. |
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* @param mem_guard_length indicates the length of guard bytes both pre-fix and post-fix. |
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* |
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* NOTE the buffer allocated from the stack or from the heap must allocate additional |
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* bytes for memory guards. The EAP_MEM_GUARDS(size) macro increases the size with count |
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* of memory guard bytes. The example use of eap_buf_chain_wr is as follows. |
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* NOTE all sanity checks are ignored in the example. |
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* |
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* @code |
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* u8_t packet_buffer[EAP_MEM_GUARDS(EAP_MAX_LOCAL_PACKET_BUFFER_LENGTH)]; |
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* eap_buf_chain_wr_c response_packet( |
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* eap_write_buffer, m_am_tools, packet_buffer, |
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* sizeof(packet_buffer), true, false, EAP_MEM_GUARD_LENGTH); |
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* const u32_t eap_header_offset = get_type_partner()->get_header_offset( |
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* &MTU, &trailer_length); |
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* eap_header_wr_c * const eap_response = (eap_header_wr_c * const) |
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* response_packet.get_data_offset(eap_header_offset, |
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* (EAP_MAX_LOCAL_PACKET_BUFFER_LENGTH |
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* -(eap_header_offset+ trailer_length))); |
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* @endcode |
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*/ |
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EAP_FUNC_IMPORT eap_buf_chain_base_c( |
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const eap_write_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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u8_t * const data, |
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const u32_t data_length, |
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const bool reset_data, |
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const bool free_buffer, |
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const u32_t mem_guard_length); |
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|
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/** |
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* The constructor of the eap_buf_chain_wr class initializes attributes using |
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* the parameters passes to it. |
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* @param eap_read_buffer_e separates the write and read-only constructors. |
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* @param tools parameter is pointer to the tools class. |
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* @param data is pointer to the buffer containing the message. |
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* @param data_length parameter is count of bytes in the buffer. |
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* @param free_buffer parameter indicates whether the destructor must free the data buffer. |
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* |
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* The example use of eap_buf_chain_wr is as follows. |
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* NOTE all sanity checks are ignored in the example. |
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* |
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* @code |
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* u8_t packet_buffer[EAP_MEM_GUARDS(EAP_MAX_LOCAL_PACKET_BUFFER_LENGTH)]; |
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* eap_buf_chain_rd_c response_packet( |
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* eap_read_buffer, m_am_tools, packet_buffer, |
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* sizeof(packet_buffer), false); |
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* const u32_t eap_header_offset = get_type_partner()->get_header_offset( |
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* &MTU, &trailer_length); |
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* eap_header_rd_c * const eap_response = (eap_header_rd_c * const) |
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* response_packet.get_data_offset(eap_header_offset, |
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* (EAP_MAX_LOCAL_PACKET_BUFFER_LENGTH |
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* -(eap_header_offset+ trailer_length))); |
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* @endcode |
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*/ |
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EAP_FUNC_IMPORT eap_buf_chain_base_c( |
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const eap_read_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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const u8_t * const data, |
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const u32_t data_length, |
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const bool free_buffer); |
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|
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/** |
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* The constructor of the eap_buf_chain_wr class initializes attributes using |
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* the parameters passes to it. |
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* New buffer is allocated from heap. |
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* @param eap_write_buffer_e separates the write and read-only constructors. |
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* @param tools parameter is pointer to the tools class. |
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* @param data_length parameter is count of bytes in the buffer. |
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* |
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* The example use of eap_buf_chain_wr is as follows. |
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* NOTE all sanity checks are ignored in the example. |
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* |
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* @code |
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* eap_buf_chain_rd_c response_packet( |
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* eap_write_buffer_e, m_am_tools, |
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* PACKET_BUFFER_LENGTH); |
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* const u32_t eap_header_offset = get_type_partner()->get_header_offset( |
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* &MTU, &trailer_length); |
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* eap_header_rd_c * const eap_response = (eap_header_rd_c * const) |
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* response_packet.get_data_offset(eap_header_offset, |
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* (PACKET_BUFFER_LENGTH |
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* -(eap_header_offset+ trailer_length))); |
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* @endcode |
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*/ |
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EAP_FUNC_IMPORT eap_buf_chain_base_c( |
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const eap_write_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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const u32_t data_length); |
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|
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/** |
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* The constructor of the eap_buf_chain_rd class initializes attributes using |
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* the parameters passes to it. |
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* New buffer is allocated from heap. |
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* @param eap_write_buffer_e separates the write and read-only constructors. |
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* @param tools parameter is pointer to the tools class. |
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* @param data_length parameter is count of bytes in the buffer. |
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* |
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* The example use of eap_buf_chain_wr is as follows. |
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* NOTE all sanity checks are ignored in the example. |
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* |
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* @code |
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* eap_buf_chain_rd_c response_packet( |
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* eap_read_buffer, m_am_tools, |
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* PACKET_BUFFER_LENGTH); |
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* const u32_t eap_header_offset = get_type_partner()->get_header_offset( |
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* &MTU, &trailer_length); |
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* eap_header_rd_c * const eap_response = (eap_header_rd_c * const) |
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* response_packet.get_data_offset(eap_header_offset, |
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* (PACKET_BUFFER_LENGTH |
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* -(eap_header_offset+ trailer_length))); |
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* @endcode |
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*/ |
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EAP_FUNC_IMPORT eap_buf_chain_base_c( |
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const eap_read_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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const u32_t data_length); |
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/** |
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* @return Returns count of memory guard bytes. |
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*/ |
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EAP_FUNC_IMPORT u32_t get_mem_guard_length(); |
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/** |
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* The get_buffer_length() function returns the length of buffer in bytes. |
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*/ |
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EAP_FUNC_IMPORT u32_t get_buffer_length() const; |
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|
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/** |
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* The get_data_length() function returns count of data bytes in the buffer. |
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*/ |
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EAP_FUNC_IMPORT u32_t get_data_length() const; |
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|
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/** |
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* The get_data_offset() function returns pointer to the data in offset (p_offset). |
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* @param p_offset indicates the required offset. |
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* @param p_continuous_bytes indicates how many bytes in continuous memory is needed. |
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* |
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* NOTE user of the eap_buf_chain_wr class must obtain the pointer to the data using |
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* this or the get_data() function. These functions can handle the memory guard. |
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*/ |
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EAP_FUNC_IMPORT u8_t * get_data_offset(const u32_t p_offset, const u32_t p_continuous_bytes) const; |
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|
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/** |
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* The get_data() function function returns pointer to the data. |
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* @param p_continuous_bytes indicates how many bytes in continuous memory is needed. |
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* |
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* NOTE user of the eap_buf_chain_wr class must obtain the pointer to the data using |
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* this or the get_data_offset() function. These functions can handle the memory guard. |
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*/ |
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EAP_FUNC_IMPORT u8_t * get_data(const u32_t p_continuous_bytes) const; |
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|
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/** |
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* The set_buffer_length() function allocates the buffer of length bytes. |
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*/ |
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EAP_FUNC_IMPORT eap_status_e set_buffer_length(const u32_t length); |
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|
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/** |
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* The set_data_length() function set the data length in the buffer. |
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*/ |
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EAP_FUNC_IMPORT eap_status_e set_data_length(const u32_t length); |
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|
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/** |
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* The get_is_valid() function returns the status of the object. |
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* @return True indicates the object is initialized. |
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*/ |
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EAP_FUNC_IMPORT bool get_is_valid() const; |
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|
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/** |
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* The get_is_valid() function returns the status of the |
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* data included in object. |
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* @return True indicates the object includes valid data. |
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*/ |
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EAP_FUNC_IMPORT bool get_is_valid_data() const; |
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|
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/** |
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* The set_is_manipulated() function sets flag to indicate this packet is manipulated. |
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* This is used for testing purposes. |
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*/ |
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EAP_FUNC_IMPORT void set_is_manipulated(); |
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/** |
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* The get_is_manipulated() function returns flag to indicate this packet is manipulated. |
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* This is used for testing purposes. |
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*/ |
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EAP_FUNC_IMPORT bool get_is_manipulated(); |
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/** |
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* This function sets the index of sent packet. |
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* This is used for testing purposes. |
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*/ |
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EAP_FUNC_IMPORT void set_send_packet_index(const u32_t send_packet_index); |
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/** |
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* This function returns the index of sent packet. |
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* This is used for testing purposes. |
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*/ |
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EAP_FUNC_IMPORT u32_t get_send_packet_index(); |
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/** |
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* The set_random_error_type() function sets the type of manipulation of the packet. |
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* This is used for testing purposes. |
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*/ |
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EAP_FUNC_IMPORT void set_random_error_type(eap_random_error_type error_type); |
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/** |
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* The get_random_error_type() function returns the type of manipulation of the packet. |
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* This is used for testing purposes. |
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*/ |
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EAP_FUNC_IMPORT eap_random_error_type get_random_error_type(); |
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/** |
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* The set_do_packet_retransmission() function sets the re-transmission flag of this packet. |
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* Packet will be re-transmitted by lower layer when do_packet_retransmission_when_true is true. |
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* Packet will not re-transmitted by lower layer when do_packet_retransmission_when_true is false. |
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*/ |
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EAP_FUNC_IMPORT void set_do_packet_retransmission(const bool do_packet_retransmission_when_true); |
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|
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/** |
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* The set_do_packet_retransmission() function gets the re-transmission flag of this packet. |
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*/ |
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EAP_FUNC_IMPORT bool get_do_packet_retransmission(); |
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|
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/** |
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* This sets whether the sender is client or server. |
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* This is used in testing. |
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*/ |
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EAP_FUNC_IMPORT void set_is_client(const bool is_client_when_true); |
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|
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/** |
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* This gets whether the sender is client or server. |
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* This is used in testing. |
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*/ |
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EAP_FUNC_IMPORT bool get_is_client() const; |
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|
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/** |
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* This is used in testing. |
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*/ |
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EAP_FUNC_IMPORT void set_do_length_checks(const bool do_length_checks); |
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|
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/** |
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* This is used in testing. |
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439 |
*/ |
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EAP_FUNC_IMPORT bool get_do_length_checks() const; |
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441 |
|
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442 |
|
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443 |
/** |
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* This sets whether this packet must be encrypted (true) or not (false). |
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* Encryption means the WLAN data encryption on the air (WEP, TKIP or CCMP). |
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* Using this flag to tell the encryption allows the configuration of the |
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* temporal key beforehand the key is used. |
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* This is optimization to fasten the key configuration. |
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*/ |
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EAP_FUNC_IMPORT void set_encrypt(const bool encrypt_when_true); |
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451 |
|
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452 |
/** |
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* This gets whether this packet must be encrypted (true) or not (false). |
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* Encryption means the WLAN data encryption on the air (WEP, TKIP or CCMP). |
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* Using this flag to tell the encryption allows the configuration of the |
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* temporal key beforehand the key is used. |
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* This is optimization to fasten the key configuration. |
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*/ |
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EAP_FUNC_IMPORT bool get_encrypt() const; |
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|
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461 |
|
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462 |
/** |
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* This sets the pointer of sender stack. |
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* This is used in testing. |
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*/ |
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EAP_FUNC_IMPORT void set_stack_address(const void * const stack_address); |
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|
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468 |
/** |
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* This gets the pointer of sender stack. |
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* This is used in testing. |
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*/ |
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EAP_FUNC_IMPORT const void * get_stack_address() const; |
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|
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/** |
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* The add_data() function adds data to the end of the buffer. |
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* If the buffer is empty the data is added to begin of the buffer. |
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* @param buffer points the data to be added. |
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* @param buffer_length is length of the buffer in bytes. |
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*/ |
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EAP_FUNC_IMPORT eap_status_e add_data( |
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const void * const buffer, |
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const u32_t buffer_length); |
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|
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484 |
/** |
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* The add_data() function adds data to the end of the buffer. |
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* If the buffer is empty the data is added to begin of the buffer. |
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* @param buffer points the data to be added. |
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*/ |
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EAP_FUNC_IMPORT eap_status_e add_data( |
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const eap_variable_data_c * const buffer); |
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491 |
|
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492 |
/** |
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* The add_data_to_offset() function adds data to the offset of the buffer. |
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* @param offset tells the place where data will begin. |
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* @param buffer points the data to be added. |
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* @param buffer_length is length of the buffer in bytes. |
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497 |
*/ |
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498 |
EAP_FUNC_IMPORT eap_status_e add_data_to_offset( |
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const u32_t offset, |
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const void * const buffer, |
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const u32_t buffer_length); |
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502 |
|
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503 |
/** |
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504 |
* The add_data() function adds data to the offset of the buffer. |
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505 |
* @param offset tells the place where data will begin. |
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* @param buffer points the data to be added. |
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507 |
*/ |
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508 |
EAP_FUNC_IMPORT eap_status_e add_data_to_offset( |
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509 |
const u32_t offset, |
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510 |
const eap_variable_data_c * const buffer); |
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511 |
|
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512 |
// |
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//-------------------------------------------------- |
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}; // class eap_buf_chain_base_c |
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515 |
|
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516 |
|
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517 |
|
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518 |
/// Write only network packets are handled through eap_buf_chain_base_c class. |
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519 |
/// Post-suffix _wr_c indicates the buffer has write attribute on. |
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/// The eap_buf_chain_wr_c class is derived from eap_buf_chain_base class. |
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521 |
class EAP_EXPORT eap_buf_chain_wr_c |
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522 |
: public eap_buf_chain_base_c |
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523 |
{ |
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524 |
private: |
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|
525 |
|
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526 |
/** |
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|
527 |
* Forses the inheritance. |
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528 |
*/ |
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|
529 |
EAP_FUNC_IMPORT void force_inheritance(); |
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530 |
|
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531 |
//-------------------------------------------------- |
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532 |
protected: |
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|
533 |
//-------------------------------------------------- |
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|
534 |
|
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|
535 |
//-------------------------------------------------- |
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|
536 |
public: |
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537 |
//-------------------------------------------------- |
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538 |
|
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539 |
/** |
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540 |
* The destructor does nothing special. |
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541 |
*/ |
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542 |
EAP_FUNC_IMPORT virtual ~eap_buf_chain_wr_c(); |
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543 |
|
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544 |
/** |
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545 |
* The costructor does nothing special. It just initializes all member attributes. |
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546 |
* This version uses preallocated buffer. |
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547 |
*/ |
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548 |
EAP_FUNC_IMPORT eap_buf_chain_wr_c( |
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const eap_write_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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u8_t * const data, |
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const u32_t data_length, |
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const bool reset_data, |
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const bool free_buffer, |
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const u32_t mem_guard_length); |
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556 |
|
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557 |
/** |
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558 |
* The costructor does nothing special. It just initializes all member attributes. |
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* This version allocates buffer from heap. |
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560 |
*/ |
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561 |
EAP_FUNC_IMPORT eap_buf_chain_wr_c( |
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const eap_write_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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const u32_t data_length); |
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565 |
|
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566 |
/** |
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567 |
* The costructor does nothing special. It just initializes all member attributes. |
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568 |
* This version does not allocate buffer. |
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* You must call set_buffer_length() member function to allocate buffer. |
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570 |
*/ |
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571 |
EAP_FUNC_IMPORT eap_buf_chain_wr_c( |
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const eap_write_buffer_e, |
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abs_eap_am_tools_c * const tools); |
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574 |
|
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575 |
/** |
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576 |
* @return Returns the pointer to the ethernet header. |
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577 |
*/ |
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578 |
EAP_FUNC_IMPORT u8_t * get_ethernet_header(); |
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579 |
|
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580 |
/** |
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581 |
* The copy() function copies the eap_buf_chain_wr object. |
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* Data is copied to new allocated buffer. |
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583 |
*/ |
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584 |
EAP_FUNC_IMPORT eap_buf_chain_wr_c * copy(); |
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585 |
|
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586 |
// |
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587 |
//-------------------------------------------------- |
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588 |
}; // class eap_buf_chain_wr_c |
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589 |
|
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|
590 |
|
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|
591 |
/// Read only network packets are handled through eap_buf_chain_rd_c class. |
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/// Post-suffix _rd_c indicates the buffer has read only attribute on. |
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593 |
/// The eap_buf_chain_rd_c class is derived from eap_buf_chain_base class. |
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594 |
class EAP_EXPORT eap_buf_chain_rd_c |
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595 |
: public eap_buf_chain_base_c |
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596 |
{ |
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597 |
private: |
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|
598 |
|
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|
599 |
/** |
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|
600 |
* Forses the inheritance. |
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601 |
*/ |
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|
602 |
EAP_FUNC_IMPORT void force_inheritance(); |
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603 |
|
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|
604 |
//-------------------------------------------------- |
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605 |
protected: |
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606 |
//-------------------------------------------------- |
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|
607 |
|
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608 |
//-------------------------------------------------- |
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609 |
public: |
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610 |
//-------------------------------------------------- |
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|
611 |
|
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|
612 |
/** |
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|
613 |
* The destructor of the eap_buf_chain_rd_c class checks memory guards. |
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614 |
*/ |
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|
615 |
EAP_FUNC_IMPORT virtual ~eap_buf_chain_rd_c(); |
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616 |
|
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|
617 |
/** |
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|
618 |
* The constructor of the eap_buf_chain_wr class initializes attributes using |
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|
619 |
* the parameters passes to it. |
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|
620 |
* @param eap_read_buffer_e separates the write and read-only constructors. |
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|
621 |
* @param tools parameter is pointer to the tools class. |
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622 |
* @param data is pointer to the buffer containing the message. |
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623 |
* @param data_length parameter is count of bytes in the buffer. |
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|
624 |
* @param free_buffer parameter indicates whether the destructor must free the data buffer. |
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|
625 |
* |
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626 |
* The example use of eap_buf_chain_wr is as follows. |
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|
627 |
* NOTE all sanity checks are ignored in the example. |
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|
628 |
* |
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|
629 |
* @code |
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* u8_t packet_buffer[EAP_MEM_GUARDS(EAP_MAX_LOCAL_PACKET_BUFFER_LENGTH)]; |
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* eap_buf_chain_rd_c response_packet( |
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* eap_read_buffer, m_am_tools, packet_buffer, |
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* sizeof(packet_buffer), false); |
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* const u32_t eap_header_offset = get_type_partner()->get_header_offset( |
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* &MTU, &trailer_length); |
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* eap_header_rd_c * const eap_response = (eap_header_rd_c * const) |
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* response_packet.get_data_offset(eap_header_offset, |
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* (EAP_MAX_LOCAL_PACKET_BUFFER_LENGTH |
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* -(eap_header_offset+ trailer_length))); |
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* @endcode |
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*/ |
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EAP_FUNC_IMPORT eap_buf_chain_rd_c( |
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const eap_read_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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const u8_t * const data, |
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const u32_t data_length, |
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const bool free_buffer); |
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|
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/** |
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* The costructor does nothing special. It just initializes all member attributes. |
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* This version allocates buffer from heap. |
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*/ |
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EAP_FUNC_IMPORT eap_buf_chain_rd_c( |
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const eap_read_buffer_e, |
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abs_eap_am_tools_c * const tools, |
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const u32_t data_length); |
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|
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/** |
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* The get_data() function function returns pointer to the data. |
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* @param p_continuous_bytes indicates how many bytes in continuous memory is needed. |
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* |
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* NOTE user of the eap_buf_chain_wr class must obtain the pointer to the data using |
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* this or the get_data_offset() function. These functions can handle the memory guard. |
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*/ |
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EAP_FUNC_IMPORT const u8_t * get_data(const u32_t p_continuous_bytes) const; |
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|
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/** |
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* The get_data_offset() function returns pointer to the data in offset (p_offset). |
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* @param p_offset indicates the required offset. |
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* @param p_continuous_bytes indicates how many bytes in continuous memory is needed. |
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* |
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* NOTE user of the eap_buf_chain_wr class must obtain the pointer to the data using |
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* this or the get_data() function. These functions can handle the memory guard. |
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*/ |
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EAP_FUNC_IMPORT const u8_t * get_data_offset(const u32_t p_offset, const u32_t p_continuous_bytes) const; |
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|
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/** |
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* @return Returns the pointer to the ethernet header. |
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*/ |
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EAP_FUNC_IMPORT const u8_t * get_ethernet_header() const; |
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|
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// |
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//-------------------------------------------------- |
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}; // class eap_buf_chain_rd_c |
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|
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|
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#endif //#if !defined(_EAP_BUFFER_H_) |
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|
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//-------------------------------------------------- |
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|
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|
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692 |
|
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// End. |