tcp.c revision 40060
1/*- 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35/* From: 36static char sccsid[] = "@(#)mbufs.c 8.1 (Berkeley) 6/6/93"; 37static const char rcsid[] = 38 "Id: mbufs.c,v 1.5 1997/02/24 20:59:03 wollman Exp"; 39*/ 40static const char rcsid[] = 41 "$Id: tcp.c,v 1.1 1997/09/27 00:44:55 wollman Exp $"; 42#endif /* not lint */ 43 44#include <sys/param.h> 45#include <sys/types.h> 46#include <sys/socket.h> 47#include <sys/sysctl.h> 48 49#include <netinet/in.h> 50#include <netinet/in_systm.h> 51#include <netinet/ip.h> 52#include <netinet/tcp.h> 53#include <netinet/tcp_seq.h> 54#include <netinet/tcp_fsm.h> 55#include <netinet/tcp_timer.h> 56#include <netinet/tcp_var.h> 57 58#include <stdlib.h> 59#include <string.h> 60#include <paths.h> 61#include "systat.h" 62#include "extern.h" 63#include "mode.h" 64 65static struct tcpstat curstat, initstat, oldstat; 66 67/*- 68--0 1 2 3 4 5 6 7 69--0123456789012345678901234567890123456789012345678901234567890123456789012345 7001 TCP Connections TCP Packets 7102999999999 connections initiated 999999999 total packets sent 7203999999999 connections accepted 999999999 - data 7304999999999 connections established 999999999 - data (retransmit) 7405999999999 connections dropped 999999999 - ack-only 7506999999999 - in embryonic state 999999999 - window probes 7607999999999 - on retransmit timeout 999999999 - window updates 7708999999999 - by keepalive 999999999 - urgent data only 7809999999999 - from listen queue 999999999 - control 7910 999999999 - resends by PMTU discovery 8011 TCP Timers 999999999 total packets received 8112999999999 potential rtt updates 999999999 - in sequence 8213999999999 - successful 999999999 - completely duplicate 8314999999999 delayed acks sent 999999999 - with some duplicate data 8415999999999 retransmit timeouts 999999999 - out-of-order 8516999999999 persist timeouts 999999999 - duplicate acks 8617999999999 keepalive probes 999999999 - acks 8718999999999 - timeouts 999999999 - window probes 8819 999999999 - window updates 89--0123456789012345678901234567890123456789012345678901234567890123456789012345 90--0 1 2 3 4 5 6 7 91*/ 92 93WINDOW * 94opentcp(void) 95{ 96 return (subwin(stdscr, LINES-5-1, 0, 5, 0)); 97} 98 99void 100closetcp(w) 101 WINDOW *w; 102{ 103 if (w == NULL) 104 return; 105 wclear(w); 106 wrefresh(w); 107 delwin(w); 108} 109 110void 111labeltcp(void) 112{ 113 wmove(wnd, 0, 0); wclrtoeol(wnd); 114#define L(row, str) mvwprintw(wnd, row, 10, str) 115#define R(row, str) mvwprintw(wnd, row, 45, str); 116 L(1, "TCP Connections"); R(1, "TCP Packets"); 117 L(2, "connections initiated"); R(2, "total packets sent"); 118 L(3, "connections accepted"); R(3, "- data"); 119 L(4, "connections established"); R(4, "- data (retransmit)"); 120 L(5, "connections dropped"); R(5, "- ack-only"); 121 L(6, "- in embryonic state"); R(6, "- window probes"); 122 L(7, "- on retransmit timeout"); R(7, "- window updates"); 123 L(8, "- by keepalive"); R(8, "- urgent data only"); 124 L(9, "- from listen queue"); R(9, "- control"); 125 R(10, "- resends by PMTU discovery"); 126 L(11, "TCP Timers"); R(11, "total packets received"); 127 L(12, "potential rtt updates"); R(12, "- in sequence"); 128 L(13, "- successful"); R(13, "- completely duplicate"); 129 L(14, "delayed acks sent"); R(14, "- with some duplicate data"); 130 L(15, "retransmit timeouts"); R(15, "- out-of-order"); 131 L(16, "persist timeouts"); R(16, "- duplicate acks"); 132 L(17, "keepalive probes"); R(17, "- acks"); 133 L(18, "- timeouts"); R(18, "- window probes"); 134 R(19, "- window updates"); 135#undef L 136#undef R 137} 138 139static void 140domode(struct tcpstat *ret) 141{ 142 const struct tcpstat *sub; 143 int divisor = 1; 144 145 switch(currentmode) { 146 case display_RATE: 147 sub = &oldstat; 148 divisor = naptime; 149 break; 150 case display_DELTA: 151 sub = &oldstat; 152 break; 153 case display_SINCE: 154 sub = &initstat; 155 break; 156 default: 157 *ret = curstat; 158 return; 159 } 160#define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor 161 DO(tcps_connattempt); 162 DO(tcps_accepts); 163 DO(tcps_connects); 164 DO(tcps_drops); 165 DO(tcps_conndrops); 166 DO(tcps_closed); 167 DO(tcps_segstimed); 168 DO(tcps_rttupdated); 169 DO(tcps_delack); 170 DO(tcps_timeoutdrop); 171 DO(tcps_rexmttimeo); 172 DO(tcps_persisttimeo); 173 DO(tcps_keeptimeo); 174 DO(tcps_keepprobe); 175 DO(tcps_keepdrops); 176 177 DO(tcps_sndtotal); 178 DO(tcps_sndpack); 179 DO(tcps_sndbyte); 180 DO(tcps_sndrexmitpack); 181 DO(tcps_sndrexmitbyte); 182 DO(tcps_sndacks); 183 DO(tcps_sndprobe); 184 DO(tcps_sndurg); 185 DO(tcps_sndwinup); 186 DO(tcps_sndctrl); 187 188 DO(tcps_rcvtotal); 189 DO(tcps_rcvpack); 190 DO(tcps_rcvbyte); 191 DO(tcps_rcvbadsum); 192 DO(tcps_rcvbadoff); 193 DO(tcps_rcvshort); 194 DO(tcps_rcvduppack); 195 DO(tcps_rcvdupbyte); 196 DO(tcps_rcvpartduppack); 197 DO(tcps_rcvpartdupbyte); 198 DO(tcps_rcvoopack); 199 DO(tcps_rcvoobyte); 200 DO(tcps_rcvpackafterwin); 201 DO(tcps_rcvbyteafterwin); 202 DO(tcps_rcvafterclose); 203 DO(tcps_rcvwinprobe); 204 DO(tcps_rcvdupack); 205 DO(tcps_rcvacktoomuch); 206 DO(tcps_rcvackpack); 207 DO(tcps_rcvackbyte); 208 DO(tcps_rcvwinupd); 209 DO(tcps_pawsdrop); 210 DO(tcps_predack); 211 DO(tcps_preddat); 212 DO(tcps_pcbcachemiss); 213 DO(tcps_cachedrtt); 214 DO(tcps_cachedrttvar); 215 DO(tcps_cachedssthresh); 216 DO(tcps_usedrtt); 217 DO(tcps_usedrttvar); 218 DO(tcps_usedssthresh); 219 DO(tcps_persistdrop); 220 DO(tcps_badsyn); 221 DO(tcps_mturesent); 222 DO(tcps_listendrop); 223#undef DO 224} 225 226void 227showtcp(void) 228{ 229 struct tcpstat stats; 230 231 memset(&stats, 0, sizeof stats); 232 domode(&stats); 233 234#define DO(stat, row, col) \ 235 mvwprintw(wnd, row, col, "%9lu", stats.stat) 236#define L(row, stat) DO(stat, row, 0) 237#define R(row, stat) DO(stat, row, 35) 238 L(2, tcps_connattempt); R(2, tcps_sndtotal); 239 L(3, tcps_accepts); R(3, tcps_sndpack); 240 L(4, tcps_connects); R(4, tcps_sndrexmitpack); 241 L(5, tcps_drops); R(5, tcps_sndacks); 242 L(6, tcps_conndrops); R(6, tcps_sndprobe); 243 L(7, tcps_timeoutdrop); R(7, tcps_sndwinup); 244 L(8, tcps_keepdrops); R(8, tcps_sndurg); 245 L(9, tcps_listendrop); R(9, tcps_sndctrl); 246 R(10, tcps_mturesent); 247 R(11, tcps_rcvtotal); 248 L(12, tcps_segstimed); R(12, tcps_rcvpack); 249 L(13, tcps_rttupdated); R(13, tcps_rcvduppack); 250 L(14, tcps_delack); R(14, tcps_rcvpartduppack); 251 L(15, tcps_rexmttimeo); R(15, tcps_rcvoopack); 252 L(16, tcps_persisttimeo); R(16, tcps_rcvdupack); 253 L(17, tcps_keepprobe); R(17, tcps_rcvackpack); 254 L(18, tcps_keeptimeo); R(18, tcps_rcvwinprobe); 255 R(19, tcps_rcvwinupd); 256#undef DO 257#undef L 258#undef R 259} 260 261int 262inittcp(void) 263{ 264 size_t len; 265 int name[4]; 266 267 name[0] = CTL_NET; 268 name[1] = PF_INET; 269 name[2] = IPPROTO_TCP; 270 name[3] = TCPCTL_STATS; 271 272 len = 0; 273 if (sysctl(name, 4, 0, &len, 0, 0) < 0) { 274 error("sysctl getting tcpstat size failed"); 275 return 0; 276 } 277 if (len > sizeof curstat) { 278 error("tcpstat structure has grown--recompile systat!"); 279 return 0; 280 } 281 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 282 error("sysctl getting tcpstat failed"); 283 return 0; 284 } 285 oldstat = initstat; 286 return 1; 287} 288 289void 290resettcp(void) 291{ 292 size_t len; 293 int name[4]; 294 295 name[0] = CTL_NET; 296 name[1] = PF_INET; 297 name[2] = IPPROTO_TCP; 298 name[3] = TCPCTL_STATS; 299 300 len = sizeof initstat; 301 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 302 error("sysctl getting tcpstat failed"); 303 } 304 oldstat = initstat; 305} 306 307void 308fetchtcp(void) 309{ 310 int name[4]; 311 size_t len; 312 313 oldstat = curstat; 314 name[0] = CTL_NET; 315 name[1] = PF_INET; 316 name[2] = IPPROTO_TCP; 317 name[3] = TCPCTL_STATS; 318 len = sizeof curstat; 319 320 if (sysctl(name, 4, &curstat, &len, 0, 0) < 0) 321 return; 322} 323 324