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 * 18Copyright (c) 2007, 2008 by Juliusz Chroboczek 19 20Permission is hereby granted, free of charge, to any person obtaining a copy 21of this software and associated documentation files (the "Software"), to deal 22in the Software without restriction, including without limitation the rights 23to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 24copies of the Software, and to permit persons to whom the Software is 25furnished to do so, subject to the following conditions: 26 27The above copyright notice and this permission notice shall be included in 28all copies or substantial portions of the Software. 29 30THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 31IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 32FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 33AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 34LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 35OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 36THE SOFTWARE. 37*/ 38 39#define REQUEST_TIMEOUT 65000 40#define RESEND_MAX 3 41 42#define RESEND_REQUEST 1 43#define RESEND_UPDATE 2 44 45struct resend { 46 unsigned char kind; 47 unsigned char max; 48 unsigned short delay; 49 struct timeval time; 50 unsigned char prefix[16]; 51 unsigned char plen; 52 unsigned short seqno; 53 unsigned char id[8]; 54 struct interface *ifp; 55 struct resend *next; 56}; 57 58extern struct timeval resend_time; 59 60struct resend *find_request(const unsigned char *prefix, unsigned char plen, 61 struct resend **previous_return); 62void flush_resends(struct neighbour *neigh); 63int record_resend(int kind, const unsigned char *prefix, unsigned char plen, 64 unsigned short seqno, const unsigned char *id, 65 struct interface *ifp, int delay); 66int unsatisfied_request(const unsigned char *prefix, unsigned char plen, 67 unsigned short seqno, const unsigned char *id); 68int request_redundant(struct interface *ifp, 69 const unsigned char *prefix, unsigned char plen, 70 unsigned short seqno, const unsigned char *id); 71int satisfy_request(const unsigned char *prefix, unsigned char plen, 72 unsigned short seqno, const unsigned char *id, 73 struct interface *ifp); 74 75void expire_resend(void); 76void recompute_resend_time(void); 77void do_resend(void); 78