1 /* $NetBSD: tcp_congctl.h,v 1.3 2006/10/21 10:24:47 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Rui Paulo. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _NETINET_TCP_CONGCTL_H 40 #define _NETINET_TCP_CONGCTL_H 41 42 /* 43 * Congestion control function table. 44 */ 45 struct tcp_congctl { 46 int (*fast_retransmit)(struct tcpcb *, const struct tcphdr *); 47 void (*slow_retransmit)(struct tcpcb *); 48 void (*fast_retransmit_newack)(struct tcpcb *, const struct tcphdr *); 49 void (*newack)(struct tcpcb *, const struct tcphdr *); 50 void (*cong_exp)(struct tcpcb *); 51 52 uint32_t refcnt; 53 }; 54 55 extern struct tcp_congctl tcp_reno_ctl; 56 extern struct tcp_congctl tcp_newreno_ctl; 57 58 extern struct simplelock tcp_congctl_slock; 59 60 #define TCPCC_MAXLEN 12 61 62 /* currently selected global congestion control */ 63 struct tcp_congctl *tcp_congctl_global; 64 char tcp_congctl_global_name[TCPCC_MAXLEN]; 65 66 /* available global congestion control algorithms */ 67 char tcp_congctl_avail[10 * TCPCC_MAXLEN]; 68 69 void tcp_congctl_init(void); 70 int tcp_congctl_register(const char *, struct tcp_congctl *); 71 int tcp_congctl_unregister(const char *); 72 int tcp_congctl_select(struct tcpcb *, const char *); 73 const char * 74 tcp_congctl_bystruct(const struct tcp_congctl *); 75 76 #endif /* _NETINET_TCP_CONGCTL_H */ 77