Segundo Equipo / NetServices

Dependents:   TimeZoneDemo EthernetJackTestCode MMEx_Challenge ntp_mem ... more

lwip/include/ipv4/lwip/autoip.h@0:ac1725ba162c, 2010-11-09 (annotated)

Committer:
segundo
Date:
Tue Nov 09 20:54:15 2010 +0000
Revision:
0:ac1725ba162c

        

        
Who changed what in which revision?

        

            
                
UserRevisionLine numberNew contents of line

            
            


segundo

0:ac1725ba162c


     1

/**





segundo

0:ac1725ba162c


     2

 * @file





segundo

0:ac1725ba162c


     3

 *





segundo

0:ac1725ba162c


     4

 * AutoIP Automatic LinkLocal IP Configuration





segundo

0:ac1725ba162c


     5

 */





segundo

0:ac1725ba162c


     6







segundo

0:ac1725ba162c


     7

/*





segundo

0:ac1725ba162c


     8

 *





segundo

0:ac1725ba162c


     9

 * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>





segundo

0:ac1725ba162c


    10

 * All rights reserved.





segundo

0:ac1725ba162c


    11

 *





segundo

0:ac1725ba162c


    12

 * Redistribution and use in source and binary forms, with or without modification,





segundo

0:ac1725ba162c


    13

 * are permitted provided that the following conditions are met:





segundo

0:ac1725ba162c


    14

 *





segundo

0:ac1725ba162c


    15

 * 1. Redistributions of source code must retain the above copyright notice,





segundo

0:ac1725ba162c


    16

 *    this list of conditions and the following disclaimer.





segundo

0:ac1725ba162c


    17

 * 2. Redistributions in binary form must reproduce the above copyright notice,





segundo

0:ac1725ba162c


    18

 *    this list of conditions and the following disclaimer in the documentation





segundo

0:ac1725ba162c


    19

 *    and/or other materials provided with the distribution.





segundo

0:ac1725ba162c


    20

 * 3. The name of the author may not be used to endorse or promote products





segundo

0:ac1725ba162c


    21

 *    derived from this software without specific prior written permission.





segundo

0:ac1725ba162c


    22

 *





segundo

0:ac1725ba162c


    23

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED





segundo

0:ac1725ba162c


    24

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF





segundo

0:ac1725ba162c


    25

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT





segundo

0:ac1725ba162c


    26

 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,





segundo

0:ac1725ba162c


    27

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT





segundo

0:ac1725ba162c


    28

 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS





segundo

0:ac1725ba162c


    29

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN





segundo

0:ac1725ba162c


    30

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING





segundo

0:ac1725ba162c


    31

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY





segundo

0:ac1725ba162c


    32

 * OF SUCH DAMAGE.





segundo

0:ac1725ba162c


    33

 *





segundo

0:ac1725ba162c


    34

 * Author: Dominik Spies <kontakt@dspies.de>





segundo

0:ac1725ba162c


    35

 *





segundo

0:ac1725ba162c


    36

 * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform





segundo

0:ac1725ba162c


    37

 * with RFC 3927.





segundo

0:ac1725ba162c


    38

 *





segundo

0:ac1725ba162c


    39

 *





segundo

0:ac1725ba162c


    40

 * Please coordinate changes and requests with Dominik Spies





segundo

0:ac1725ba162c


    41

 * <kontakt@dspies.de>





segundo

0:ac1725ba162c


    42

 */





segundo

0:ac1725ba162c


    43

 





segundo

0:ac1725ba162c


    44

#ifndef __LWIP_AUTOIP_H__





segundo

0:ac1725ba162c


    45

#define __LWIP_AUTOIP_H__





segundo

0:ac1725ba162c


    46







segundo

0:ac1725ba162c


    47

#include "lwip/opt.h"





segundo

0:ac1725ba162c


    48







segundo

0:ac1725ba162c


    49

#if LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */





segundo

0:ac1725ba162c


    50







segundo

0:ac1725ba162c


    51

#include "lwip/netif.h"





segundo

0:ac1725ba162c


    52

#include "lwip/udp.h"





segundo

0:ac1725ba162c


    53

#include "netif/etharp.h"





segundo

0:ac1725ba162c


    54







segundo

0:ac1725ba162c


    55

#ifdef __cplusplus





segundo

0:ac1725ba162c


    56

extern "C" {





segundo

0:ac1725ba162c


    57

#endif





segundo

0:ac1725ba162c


    58







segundo

0:ac1725ba162c


    59

/* AutoIP Timing */





segundo

0:ac1725ba162c


    60

#define AUTOIP_TMR_INTERVAL      100





segundo

0:ac1725ba162c


    61

#define AUTOIP_TICKS_PER_SECOND (1000 / AUTOIP_TMR_INTERVAL)





segundo

0:ac1725ba162c


    62







segundo

0:ac1725ba162c


    63

/* RFC 3927 Constants */





segundo

0:ac1725ba162c


    64

#define PROBE_WAIT               1   /* second   (initial random delay)                 */





segundo

0:ac1725ba162c


    65

#define PROBE_MIN                1   /* second   (minimum delay till repeated probe)    */





segundo

0:ac1725ba162c


    66

#define PROBE_MAX                2   /* seconds  (maximum delay till repeated probe)    */





segundo

0:ac1725ba162c


    67

#define PROBE_NUM                3   /*          (number of probe packets)              */





segundo

0:ac1725ba162c


    68

#define ANNOUNCE_NUM             2   /*          (number of announcement packets)       */





segundo

0:ac1725ba162c


    69

#define ANNOUNCE_INTERVAL        2   /* seconds  (time between announcement packets)    */





segundo

0:ac1725ba162c


    70

#define ANNOUNCE_WAIT            2   /* seconds  (delay before announcing)              */





segundo

0:ac1725ba162c


    71

#define MAX_CONFLICTS            10  /*          (max conflicts before rate limiting)   */





segundo

0:ac1725ba162c


    72

#define RATE_LIMIT_INTERVAL      60  /* seconds  (delay between successive attempts)    */





segundo

0:ac1725ba162c


    73

#define DEFEND_INTERVAL          10  /* seconds  (min. wait between defensive ARPs)     */





segundo

0:ac1725ba162c


    74







segundo

0:ac1725ba162c


    75

/* AutoIP client states */





segundo

0:ac1725ba162c


    76

#define AUTOIP_STATE_OFF         0





segundo

0:ac1725ba162c


    77

#define AUTOIP_STATE_PROBING     1





segundo

0:ac1725ba162c


    78

#define AUTOIP_STATE_ANNOUNCING  2





segundo

0:ac1725ba162c


    79

#define AUTOIP_STATE_BOUND       3





segundo

0:ac1725ba162c


    80







segundo

0:ac1725ba162c


    81

struct autoip





segundo

0:ac1725ba162c


    82

{





segundo

0:ac1725ba162c


    83

  ip_addr_t llipaddr;       /* the currently selected, probed, announced or used LL IP-Address */





segundo

0:ac1725ba162c


    84

  u8_t state;               /* current AutoIP state machine state */





segundo

0:ac1725ba162c


    85

  u8_t sent_num;            /* sent number of probes or announces, dependent on state */





segundo

0:ac1725ba162c


    86

  u16_t ttw;                /* ticks to wait, tick is AUTOIP_TMR_INTERVAL long */





segundo

0:ac1725ba162c


    87

  u8_t lastconflict;        /* ticks until a conflict can be solved by defending */





segundo

0:ac1725ba162c


    88

  u8_t tried_llipaddr;      /* total number of probed/used Link Local IP-Addresses */





segundo

0:ac1725ba162c


    89

};





segundo

0:ac1725ba162c


    90







segundo

0:ac1725ba162c


    91







segundo

0:ac1725ba162c


    92

/** Init srand, has to be called before entering mainloop */





segundo

0:ac1725ba162c


    93

void autoip_init(void);





segundo

0:ac1725ba162c


    94







segundo

0:ac1725ba162c


    95

/** Set a struct autoip allocated by the application to work with */





segundo

0:ac1725ba162c


    96

void autoip_set_struct(struct netif *netif, struct autoip *autoip);





segundo

0:ac1725ba162c


    97







segundo

0:ac1725ba162c


    98

/** Start AutoIP client */





segundo

0:ac1725ba162c


    99

err_t autoip_start(struct netif *netif);





segundo

0:ac1725ba162c


   100







segundo

0:ac1725ba162c


   101

/** Stop AutoIP client */





segundo

0:ac1725ba162c


   102

err_t autoip_stop(struct netif *netif);





segundo

0:ac1725ba162c


   103







segundo

0:ac1725ba162c


   104

/** Handles every incoming ARP Packet, called by etharp_arp_input */





segundo

0:ac1725ba162c


   105

void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr);





segundo

0:ac1725ba162c


   106







segundo

0:ac1725ba162c


   107

/** Has to be called in loop every AUTOIP_TMR_INTERVAL milliseconds */





segundo

0:ac1725ba162c


   108

void autoip_tmr(void);





segundo

0:ac1725ba162c


   109







segundo

0:ac1725ba162c


   110

/** Handle a possible change in the network configuration */





segundo

0:ac1725ba162c


   111

void autoip_network_changed(struct netif *netif);





segundo

0:ac1725ba162c


   112







segundo

0:ac1725ba162c


   113

#ifdef __cplusplus





segundo

0:ac1725ba162c


   114

}





segundo

0:ac1725ba162c


   115

#endif





segundo

0:ac1725ba162c


   116







segundo

0:ac1725ba162c


   117

#endif /* LWIP_AUTOIP */





segundo

0:ac1725ba162c


   118







segundo

0:ac1725ba162c


   119

#endif /* __LWIP_AUTOIP_H__ */