babeld/source.h

   1 /*
   2 Copyright (c) 2007, 2008 by Juliusz Chroboczek
   3
   4 Permission is hereby granted, free of charge, to any person obtaining a copy
   5 of this software and associated documentation files (the "Software"), to deal
   6 in the Software without restriction, including without limitation the rights
   7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8 copies of the Software, and to permit persons to whom the Software is
   9 furnished to do so, subject to the following conditions:
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20 THE SOFTWARE.
  21 */
  22
  23 #ifndef BABEL_SOURCE_H
  24 #define BABEL_SOURCE_H
  25
  26 #define SOURCE_GC_TIME 200
  27
  28 struct source {
  29     struct source *next;
  30     unsigned char id[8];
  31     unsigned char prefix[16];
  32     unsigned char plen;
  33     unsigned short seqno;
  34     unsigned short metric;
  35     unsigned short route_count;
  36     time_t time;
  37 };
  38
  39 struct source *find_source(const unsigned char *id,
  40                            const unsigned char *p,
  41                            unsigned char plen,
  42                            int create, unsigned short seqno);
  43 struct source *retain_source(struct source *src);
  44 void release_source(struct source *src);
  45 int flush_source(struct source *src);
  46 void update_source(struct source *src,
  47                    unsigned short seqno, unsigned short metric);
  48 void expire_sources(void);
  49 void check_sources_released(void);
  50
  51 #endif