SVN Repository / Prohlížení

enc28j60_dhcp.h

   1  /*******************************************************************************
   2     enc28j60_dhcp.h: Implementace protokolu DHCP.
   3     Copyright (C) 2010 Brno University of Technology,
   4                        Faculty of Information Technology
   5     Author(s): Martin Musil <xmusil34 AT fit.vutbr.cz>
   6  
   7     LICENSE TERMS
   8  
   9     Redistribution and use in source and binary forms, with or without
  10     modification, are permitted provided that the following conditions
  11     are met:
  12     1. Redistributions of source code must retain the above copyright
  13        notice, this list of conditions and the following disclaimer.
  14     2. Redistributions in binary form must reproduce the above copyright
  15        notice, this list of conditions and the following disclaimer in
  16        the documentation and/or other materials provided with the
  17        distribution.
  18     3. All advertising materials mentioning features or use of this software
  19        or firmware must display the following acknowledgement:
  20  
  21          This product includes software developed by the University of
  22          Technology, Faculty of Information Technology, Brno and its
  23          contributors.
  24  
  25     4. Neither the name of the Company nor the names of its contributors
  26        may be used to endorse or promote products derived from this
  27        software without specific prior written permission.
  28  
  29     This software or firmware is provided ``as is'', and any express or implied
  30     warranties, including, but not limited to, the implied warranties of
  31     merchantability and fitness for a particular purpose are disclaimed.
  32     In no event shall the company or contributors be liable for any
  33     direct, indirect, incidental, special, exemplary, or consequential
  34     damages (including, but not limited to, procurement of substitute
  35     goods or services; loss of use, data, or profits; or business
  36     interruption) however caused and on any theory of liability, whether
  37     in contract, strict liability, or tort (including negligence or
  38     otherwise) arising in any way out of the use of this software, even
  39     if advised of the possibility of such damage.
  40  
  41     $Id$
  42  
  43  *******************************************************************************/
  44  
  45  /**
  46  	\file enc28j60_dhcp.h
  47  	\brief Implementace protokolu DHCP.
  48  */
  49  
  50  #ifndef _ENC28J60_DHCP_
  51  #define _ENC28J60_DHCP_
  52  
  53  /**
  54   \cond
  55   **/
  56  
  57  
  58  
  59  
  60  /**
  61  
  62  	\struct bootp_h
  63   **/
  64  
  65  struct bootp_h{
  66  
  67  	unsigned char hw_type;					///< typ HW adresy
  68  
  69  	unsigned char hop_count;
  70  	unsigned long transaction_id;			///< ID transakce
  71  	unsigned int seconds;
  72  	unsigned int flags;
  73  	unsigned long client_ip;
  74  
  75  	unsigned long server_ip;
  76  	unsigned long gateway_ip;
  77  	unsigned char client_hw_address[16];	///< HW adresa klienta
  78  };
  79  
  80  
  81  #define BOOTP_REQUEST 1
  82  #define BOOTP_REPLY 2
  83  
  84  #define BOOTP_HW_ETH 1
  85  
  86  #define BOOTP_FLAG_BROADCAST 0x8000
  87  
  88  //DHCP porty
  89  #define DHCP_CLIENT_PORT 68
  90  #define DHCP_SERVER_PORT 67
  91  
  92  #define MAGIC_LEN 4
  93  #define MAGIC_COOKIE 0x63538263
  94  
  95  //parametry DHCP
  96  #define DHCP_PAD 0
  97  #define DHCP_SUBNET_MASK 1
  98  #define DHCP_ROUTER 3
  99  #define DHCP_DNS_SERVER 6
 100  #define DHCP_REQUESTED_IP 50
 101  #define DHCP_MESSAGE_TYPE 53
 102  #define DHCP_SERVER_ID 54
 103  #define DHCP_END 255
 104  
 105  //DHCP typy zprav
 106  #define DHCP_DISCOVER 1
 107  #define DHCP_OFFER 2
 108  #define DHCP_REQUEST 3
 109  #define DHCP_DECLINE 4
 110  #define DHCP_ACK 5
 111  #define DHCP_NACK 6
 112  #define DHCP_RELEASE 7
 113  
 114  #define DHCP_START 0
 115  
 116  
 117  /**
 118   \endcond
 119   **/
 120  
 121  /**
 122   \brief Inicializace DHCP klienta.
 123  
 124  
 125   **/
 126  char dhcp_init();
 127  
 128  /**
 129   \brief Restart DHCP klienta.
 130  
 131  
 132   **/
 133  char dhcp_reset();
 134  
 135  /**
 136  
 137  
 138   **/
 139  void dhcp_timer();
 140  
 141  /**
 142  
 143  
 144  
 145   **/
 146  char dhcp_ready();
 147  
 148  #define TIMERA_ISR_INIT() /* inicializace casovace, 500ms */ \
 149     { CCTL0 = CCIE;	/* povoleni preruseni pro casovac, rezim vystupni komparace	 */ \
 150  	  CCR0 = 0x4000;	   /* 16384 = 0x4000; preruseni kazdych 500ms */ \
 151  	  TACTL = TASSEL_1 + MC_2; } /* ACLK (f_tiku = 32768 Hz = 0x8000 Hz), nepretrzity rezim */ \
 152  
 153  #define TIMERA_ISR_DHCP() \
 154    interrupt (TIMERA0_VECTOR) Timer_A (void) { \
 155       dhcp_timer();		/*dhcp casovac*/ \
 156  	  CCR0 += 0x4000;	  /*preruseni kazdych 500ms*/ \
 157    }
 158  
 159  #define TIMERA_ISR_DHCP_TCP() \
 160    interrupt (TIMERA0_VECTOR) Timer_A (void) { \
 161       dhcp_timer();	  /*dhcp casovac*/ \
 162       tcp_timer();		  /*tcp casovac*/ \
 163  	  CCR0 += 0x4000;	  /*preruseni kazdych 500ms*/ \
 164    }
 165  
 166  #endif /*_ENC28J60_DHCP_*/
 167