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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_SOURCE_H
   40: #define BABEL_SOURCE_H
   41: 
   42: #define SOURCE_GC_TIME 200
   43: 
   44: struct source {
   45:     struct source *next;
   46:     unsigned char id[8];
   47:     unsigned char prefix[16];
   48:     unsigned char plen;
   49:     unsigned short seqno;
   50:     unsigned short metric;
   51:     unsigned short route_count;
   52:     time_t time;
   53: };
   54: 
   55: struct source *find_source(const unsigned char *id,
   56:                            const unsigned char *p,
   57:                            unsigned char plen,
   58:                            int create, unsigned short seqno);
   59: struct source *retain_source(struct source *src);
   60: void release_source(struct source *src);
   61: int flush_source(struct source *src);
   62: void update_source(struct source *src,
   63:                    unsigned short seqno, unsigned short metric);
   64: void expire_sources(void);
   65: void check_sources_released(void);
   66: 
   67: #endif