proto/rip/rip.h

   1 /*
   2  * Structures for RIP protocol
   3  *
   4    FIXME: in V6, they insert additional entry whenever next hop differs. Such entry is identified by 0xff in metric.
   5  */
   6
   7 #include "nest/route.h"
   8 #include "nest/password.h"
   9
  10 #define EA_RIP_TAG      EA_CODE(EAP_RIP, 0)
  11 #define EA_RIP_METRIC   EA_CODE(EAP_RIP, 1)
  12
  13 #define PACKET_MAX 25
  14 #define PACKET_MD5_MAX 18       /* FIXME */
  15
  16 struct rip_connection {
  17   node n;
  18
  19   int num;
  20   struct proto *proto;
  21   ip_addr addr;
  22   sock *send;
  23   struct rip_interface *rif;
  24   struct fib_iterator iter;
  25
  26   ip_addr daddr;
  27   int dport;
  28   int done;
  29 };
  30
  31 struct rip_packet_heading {
  32   u8 command;
  33 #define RIPCMD_REQUEST          1       /* want info */
  34 #define RIPCMD_RESPONSE         2       /* responding to request */
  35 #define RIPCMD_TRACEON          3       /* turn tracing on */
  36 #define RIPCMD_TRACEOFF         4       /* turn it off */
  37 #define RIPCMD_MAX              5
  38   u8 version;
  39 #define RIP_V1 1
  40 #define RIP_V2 2
  41   u16 unused;
  42 };
  43
  44 #ifndef IPV6
  45 struct rip_block {
  46   u16 family;   /* 0xffff on first message means this is authentication */
  47   u16 tag;
  48   ip_addr network;
  49   ip_addr netmask;
  50   ip_addr nexthop;
  51   u32 metric;
  52 };
  53 #else
  54 struct rip_block {
  55   ip_addr network;
  56   u16 tag;
  57   u8 pxlen;
  58   u8 metric
  59 };
  60 #endif
  61
  62 struct rip_block_auth {
  63   u16 mustbeFFFF;
  64   u16 authtype;
  65   u16 packetlen;
  66   u8 keyid;
  67   u8 authlen;
  68   u32 seq;
  69   u32 zero0;
  70   u32 zero1;
  71 };
  72
  73 struct rip_md5_tail {
  74   u16 mustbeFFFF;
  75   u16 mustbe0001;
  76   char md5[16];
  77 };
  78
  79 struct rip_entry {
  80   struct fib_node n;
  81
  82   ip_addr whotoldme;
  83   ip_addr nexthop;
  84   int metric;
  85   u16 tag;
  86
  87   bird_clock_t updated, changed;
  88   int flags;
  89 #define RIP_F_EXTERNAL 1
  90 };
  91
  92 struct rip_packet {
  93   struct rip_packet_heading heading;
  94   struct rip_block block[25];
  95 };
  96
  97 struct rip_interface {
  98   node n;
  99   struct proto *proto;
 100   struct iface *iface;
 101   sock *sock;
 102   struct rip_connection *busy;
 103   struct rip_patt *patt;
 104   int triggered;
 105 };
 106
 107 struct rip_patt {
 108   struct iface_patt i;
 109
 110   int metric;
 111   int mode;
 112 #define IM_MULTICAST 1
 113 #define IM_BROADCAST 2
 114 #define IM_QUIET 4
 115 #define IM_NOLISTEN 8
 116 #define IM_VERSION1 16
 117 };
 118
 119 struct rip_proto_config {
 120   struct proto_config c;
 121   list iface_list;      /* Patterns configured */
 122
 123   int infinity;         /* User configurable data */
 124   int port;
 125   int period;
 126   int garbage_time;
 127   int timeout_time;
 128
 129   struct password_item *passwords;
 130   int authtype;
 131 #define AT_NONE 0
 132 #define AT_PLAINTEXT 2
 133 #define AT_MD5 3
 134   int honour;
 135 #define HO_NEVER 0
 136 #define HO_NEIGHBOUR 1
 137 #define HO_ALWAYS 2
 138 };
 139
 140 struct rip_proto {
 141   struct proto inherited;
 142   timer *timer;
 143   list connections;
 144   struct fib rtable;
 145   list garbage;
 146   list interfaces;      /* Interfaces we really know about */
 147   int magic;
 148   int tx_count;         /* Do one regular update once in a while */
 149 };
 150
 151
 152 #define RIP_MAGIC 81861253
 153 #define CHK_MAGIC do { if (P->magic != RIP_MAGIC) bug( "Not enough magic\n" ); } while (0)
 154
 155 void rip_init_instance(struct proto *p);
 156 void rip_init_config(struct rip_proto_config *c);
 157
 158 /* Authentication functions */
 159
 160 int rip_incoming_authentication( struct proto *p, struct rip_block_auth *block, struct rip_packet *packet, int num );
 161 void rip_outgoing_authentication( struct proto *p, struct rip_block_auth *block, struct rip_packet *packet, int num );