babeld/message.h

   1 // SPDX-License-Identifier: MIT
   2 /*
   3 Copyright (c) 2007, 2008 by Juliusz Chroboczek
   4 */
   5
   6 #ifndef BABEL_MESSAGE_H
   7 #define BABEL_MESSAGE_H
   8
   9 #include "babel_interface.h"
  10
  11 #define MAX_BUFFERED_UPDATES 200
  12
  13 #define BUCKET_TOKENS_MAX 200
  14 #define BUCKET_TOKENS_PER_SEC 40
  15
  16 /* A registry of assigned TLV and sub-TLV types is available at
  17    http://www.pps.univ-paris-diderot.fr/~jch/software/babel/babel-tlv-registry.text
  18 */
  19 #define MESSAGE_PAD1 0
  20 #define MESSAGE_PADN 1
  21 #define MESSAGE_ACK_REQ 2
  22 #define MESSAGE_ACK 3
  23 #define MESSAGE_HELLO 4
  24 #define MESSAGE_IHU 5
  25 #define MESSAGE_ROUTER_ID 6
  26 #define MESSAGE_NH 7
  27 #define MESSAGE_UPDATE 8
  28 #define MESSAGE_REQUEST 9
  29 #define MESSAGE_MH_REQUEST 10
  30 #define MESSAGE_MAX 10
  31
  32 /* Protocol extension through sub-TLVs. */
  33 #define SUBTLV_PAD1 0
  34 #define SUBTLV_PADN 1
  35 #define SUBTLV_DIVERSITY 2 /* Also known as babelz. */
  36 #define SUBTLV_TIMESTAMP 3 /* Used to compute RTT. */
  37 #define SUBTLV_SOURCE_PREFIX 128 /* Source-specific routing. */
  38 #define SUBTLV_MANDATORY 0x80
  39
  40 extern unsigned short myseqno;
  41
  42 extern int broadcast_ihu;
  43 extern int split_horizon;
  44
  45 extern struct neighbour *unicast_neighbour;
  46 extern struct timeval unicast_flush_timeout;
  47
  48 void parse_packet(const unsigned char *from, struct interface *ifp,
  49                   const unsigned char *packet, int packetlen);
  50 void flushbuf(struct interface *ifp);
  51 void flushupdates(struct interface *ifp);
  52 void send_ack(struct neighbour *neigh, unsigned short nonce,
  53               unsigned short interval);
  54 void send_hello_noupdate(struct interface *ifp, unsigned interval);
  55 void send_hello(struct interface *ifp);
  56 void flush_unicast(int dofree);
  57 void send_update(struct interface *ifp, int urgent,
  58                  const unsigned char *prefix, unsigned char plen);
  59 void send_update_resend(struct interface *ifp,
  60                         const unsigned char *prefix, unsigned char plen);
  61 void send_wildcard_retraction(struct interface *ifp);
  62 void update_myseqno(void);
  63 void send_self_update(struct interface *ifp);
  64 void send_ihu(struct neighbour *neigh, struct interface *ifp);
  65 void send_marginal_ihu(struct interface *ifp);
  66 void send_request(struct interface *ifp,
  67                   const unsigned char *prefix, unsigned char plen);
  68 void send_unicast_request(struct neighbour *neigh,
  69                           const unsigned char *prefix, unsigned char plen);
  70 void send_multihop_request(struct interface *ifp,
  71                            const unsigned char *prefix, unsigned char plen,
  72                            unsigned short seqno, const unsigned char *id,
  73                            unsigned short hop_count);
  74 void
  75 send_unicast_multihop_request(struct neighbour *neigh,
  76                               const unsigned char *prefix, unsigned char plen,
  77                               unsigned short seqno, const unsigned char *id,
  78                               unsigned short hop_count);
  79 void send_request_resend(struct neighbour *neigh,
  80                          const unsigned char *prefix, unsigned char plen,
  81                          unsigned short seqno, unsigned char *id);
  82 void handle_request(struct neighbour *neigh, const unsigned char *prefix,
  83                     unsigned char plen, unsigned char hop_count,
  84                     unsigned short seqno, const unsigned char *id);
  85
  86 #endif