1 /* $NetBSD: altq_flowvalve.h,v 1.2 2000/12/14 08:49:50 thorpej Exp $ */ 2 /* $KAME: altq_flowvalve.h,v 1.4 2000/12/14 08:12:46 thorpej Exp $ */ 3 4 /* 5 * Copyright (C) 1998-2000 6 * Sony Computer Science Laboratories Inc. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _ALTQ_ALTQ_FLOWVALVE_H_ 31 #define _ALTQ_ALTQ_FLOWVALVE_H_ 32 33 #ifdef _KERNEL 34 35 /* fv_flow structure to define a unique address pair */ 36 struct fv_flow { 37 int flow_af; /* address family */ 38 union { 39 struct { 40 struct in_addr ip_src; 41 struct in_addr ip_dst; 42 } _ip; 43 #ifdef INET6 44 struct { 45 struct in6_addr ip6_src; 46 struct in6_addr ip6_dst; 47 } _ip6; 48 #endif 49 } flow_un; 50 }; 51 52 #define flow_ip flow_un._ip 53 #define flow_ip6 flow_un._ip6 54 55 /* flowvalve entry */ 56 struct fve { 57 TAILQ_ENTRY(fve) fve_lru; /* for LRU list */ 58 59 enum fv_state { Green, Red } fve_state; 60 61 int fve_p; /* scaled average drop rate */ 62 int fve_f; /* scaled average fraction */ 63 int fve_count; /* counter to update f */ 64 u_int fve_ifseq; /* ifseq at the last update of f */ 65 struct timeval fve_lastdrop; /* timestamp of the last drop */ 66 67 struct fv_flow fve_flow; /* unique address pair */ 68 }; 69 70 /* flowvalve structure */ 71 struct flowvalve { 72 u_int fv_ifseq; /* packet sequence number */ 73 int fv_flows; /* number of valid flows in the flowlist */ 74 int fv_pthresh; /* drop rate threshold */ 75 76 TAILQ_HEAD(fv_flowhead, fve) fv_flowlist; /* LRU list */ 77 78 struct fve *fv_fves; /* pointer to the allocated fves */ 79 80 int *fv_p2ftab; /* drop rate to fraction table */ 81 82 struct { 83 u_int pass; /* # of packets that have the fve 84 but aren't predropped */ 85 u_int predrop; /* # of packets predropped */ 86 u_int alloc; /* # of fves assigned */ 87 u_int escape; /* # of fves escaped */ 88 } fv_stats; 89 }; 90 91 #endif /* _KERNEL */ 92 93 #endif /* _ALTQ_ALTQ_FLOWVALVE_H_ */ 94