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    1: /*  
    2:  *  This file is free software: you may copy, redistribute and/or modify it  
    3:  *  under the terms of the GNU General Public License as published by the  
    4:  *  Free Software Foundation, either version 2 of the License, or (at your  
    5:  *  option) any later version.  
    6:  *  
    7:  *  This file is distributed in the hope that it will be useful, but  
    8:  *  WITHOUT ANY WARRANTY; without even the implied warranty of  
    9:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  
   10:  *  General Public License for more details.  
   11:  *  
   12:  *  You should have received a copy of the GNU General Public License  
   13:  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.  
   14:  *  
   15:  * This file incorporates work covered by the following copyright and  
   16:  * permission notice:  
   17:  *  
   18: Copyright (c) 2007, 2008 by Juliusz Chroboczek
   19: 
   20: Permission is hereby granted, free of charge, to any person obtaining a copy
   21: of this software and associated documentation files (the "Software"), to deal
   22: in the Software without restriction, including without limitation the rights
   23: to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   24: copies of the Software, and to permit persons to whom the Software is
   25: furnished to do so, subject to the following conditions:
   26: 
   27: The above copyright notice and this permission notice shall be included in
   28: all copies or substantial portions of the Software.
   29: 
   30: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   31: IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   32: FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
   33: AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   34: LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   35: OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   36: THE SOFTWARE.
   37: */
   38: 
   39: #ifndef BABEL_MESSAGE_H
   40: #define BABEL_MESSAGE_H
   41: 
   42: #include "babel_interface.h"
   43: 
   44: #define MAX_BUFFERED_UPDATES 200
   45: 
   46: #define BUCKET_TOKENS_MAX 200
   47: #define BUCKET_TOKENS_PER_SEC 40
   48: 
   49: #define MESSAGE_PAD1 0
   50: #define MESSAGE_PADN 1
   51: #define MESSAGE_ACK_REQ 2
   52: #define MESSAGE_ACK 3
   53: #define MESSAGE_HELLO 4
   54: #define MESSAGE_IHU 5
   55: #define MESSAGE_ROUTER_ID 6
   56: #define MESSAGE_NH 7
   57: #define MESSAGE_UPDATE 8
   58: #define MESSAGE_REQUEST 9
   59: #define MESSAGE_MH_REQUEST 10
   60: 
   61: 
   62: extern unsigned short myseqno;
   63: extern struct timeval seqno_time;
   64: 
   65: extern int broadcast_ihu;
   66: extern int split_horizon;
   67: 
   68: extern unsigned char packet_header[4];
   69: 
   70: extern struct neighbour *unicast_neighbour;
   71: extern struct timeval unicast_flush_timeout;
   72: 
   73: void parse_packet(const unsigned char *from, struct interface *ifp,
   74:                   const unsigned char *packet, int packetlen);
   75: void flushbuf(struct interface *ifp);
   76: void flushupdates(struct interface *ifp);
   77: void send_ack(struct neighbour *neigh, unsigned short nonce,
   78:               unsigned short interval);
   79: void send_hello_noupdate(struct interface *ifp, unsigned interval);
   80: void send_hello(struct interface *ifp);
   81: void flush_unicast(int dofree);
   82: void send_update(struct interface *ifp, int urgent,
   83:                  const unsigned char *prefix, unsigned char plen);
   84: void send_update_resend(struct interface *ifp,
   85:                         const unsigned char *prefix, unsigned char plen);
   86: void send_wildcard_retraction(struct interface *ifp);
   87: void update_myseqno(void);
   88: void send_self_update(struct interface *ifp);
   89: void send_ihu(struct neighbour *neigh, struct interface *ifp);
   90: void send_marginal_ihu(struct interface *ifp);
   91: void send_request(struct interface *ifp,
   92:                   const unsigned char *prefix, unsigned char plen);
   93: void send_unicast_request(struct neighbour *neigh,
   94:                           const unsigned char *prefix, unsigned char plen);
   95: void send_multihop_request(struct interface *ifp,
   96:                            const unsigned char *prefix, unsigned char plen,
   97:                            unsigned short seqno, const unsigned char *id,
   98:                            unsigned short hop_count);
   99: void
  100: send_unicast_multihop_request(struct neighbour *neigh,
  101:                               const unsigned char *prefix, unsigned char plen,
  102:                               unsigned short seqno, const unsigned char *id,
  103:                               unsigned short hop_count);
  104: void send_request_resend(struct neighbour *neigh,
  105:                          const unsigned char *prefix, unsigned char plen,
  106:                          unsigned short seqno, unsigned char *id);
  107: void handle_request(struct neighbour *neigh, const unsigned char *prefix,
  108:                     unsigned char plen, unsigned char hop_count,
  109:                     unsigned short seqno, const unsigned char *id);
  110: 
  111: #endif