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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: struct neighbour {
   40:     struct neighbour *next;
   41:     /* This is -1 when unknown, so don't make it unsigned */
   42:     int hello_seqno;
   43:     unsigned char address[16];
   44:     unsigned short reach;
   45:     unsigned short txcost;
   46:     struct timeval hello_time;
   47:     struct timeval ihu_time;
   48:     unsigned short hello_interval; /* in centiseconds */
   49:     unsigned short ihu_interval;   /* in centiseconds */
   50:     struct interface *ifp;
   51: };
   52: 
   53: extern struct neighbour *neighs;
   54: 
   55: #define FOR_ALL_NEIGHBOURS(_neigh) \
   56:     for(_neigh = neighs; _neigh; _neigh = _neigh->next)
   57: 
   58: int neighbour_valid(struct neighbour *neigh);
   59: void flush_neighbour(struct neighbour *neigh);
   60: struct neighbour *find_neighbour(const unsigned char *address,
   61:                                  struct interface *ifp);
   62: int update_neighbour(struct neighbour *neigh, int hello, int hello_interval);
   63: unsigned check_neighbours(void);
   64: unsigned neighbour_txcost(struct neighbour *neigh);
   65: unsigned neighbour_rxcost(struct neighbour *neigh);
   66: unsigned neighbour_cost(struct neighbour *neigh);