tcp.c revision 331722
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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#if 0 31#ifndef lint 32/* From: */ 33static char sccsid[] = "@(#)mbufs.c 8.1 (Berkeley) 6/6/93"; 34static const char rcsid[] = 35 "Id: mbufs.c,v 1.5 1997/02/24 20:59:03 wollman Exp"; 36#endif /* not lint */ 37#endif 38 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD: stable/11/usr.bin/systat/tcp.c 331722 2018-03-29 02:50:57Z eadler $"); 41 42#include <sys/param.h> 43#include <sys/types.h> 44#include <sys/socket.h> 45#include <sys/sysctl.h> 46 47#include <netinet/in.h> 48#include <netinet/in_systm.h> 49#include <netinet/ip.h> 50#include <netinet/tcp.h> 51#include <netinet/tcp_seq.h> 52#include <netinet/tcp_fsm.h> 53#include <netinet/tcp_timer.h> 54#include <netinet/tcp_var.h> 55 56#include <stdlib.h> 57#include <string.h> 58#include <paths.h> 59 60#include "systat.h" 61#include "extern.h" 62#include "mode.h" 63 64static struct tcpstat curstat, initstat, oldstat; 65 66/*- 67--0 1 2 3 4 5 6 7 68--0123456789012345678901234567890123456789012345678901234567890123456789012345 6900 TCP Connections TCP Packets 7001999999999999 connections initiated 999999999999 total packets sent 7102999999999999 connections accepted 999999999999 - data 7203999999999999 connections established 999999999999 - data (retransmit by dupack) 7304999999999999 connections dropped 999999999999 - data (retransmit by sack) 7405999999999999 - in embryonic state 999999999999 - ack-only 7506999999999999 - on retransmit timeout 999999999999 - window probes 7607999999999999 - by keepalive 999999999999 - window updates 7708999999999999 - from listen queue 999999999999 - urgent data only 7809 999999999999 - control 7910 999999999999 - resends by PMTU discovery 8011 TCP Timers 999999999999 total packets received 8112999999999999 potential rtt updates 999999999999 - in sequence 8213999999999999 - successful 999999999999 - completely duplicate 8314999999999999 delayed acks sent 999999999999 - with some duplicate data 8415999999999999 retransmit timeouts 999999999999 - out-of-order 8516999999999999 persist timeouts 999999999999 - duplicate acks 8617999999999999 keepalive probes 999999999999 - acks 8718999999999999 - timeouts 999999999999 - window probes 8819 999999999999 - window updates 8920 999999999999 - bad checksum 90--0123456789012345678901234567890123456789012345678901234567890123456789012345 91--0 1 2 3 4 5 6 7 92*/ 93 94WINDOW * 95opentcp(void) 96{ 97 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0)); 98} 99 100void 101closetcp(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, 13, str) 115#define R(row, str) mvwprintw(wnd, row, 51, str); 116 L(0, "TCP Connections"); R(0, "TCP Packets"); 117 L(1, "connections initiated"); R(1, "total packets sent"); 118 L(2, "connections accepted"); R(2, "- data"); 119 L(3, "connections established"); R(3, "- data (retransmit by dupack)"); 120 L(4, "connections dropped"); R(4, "- data (retransmit by sack)"); 121 L(5, "- in embryonic state"); R(5, "- ack-only"); 122 L(6, "- on retransmit timeout"); R(6, "- window probes"); 123 L(7, "- by keepalive"); R(7, "- window updates"); 124 L(8, "- from listen queue"); R(8, "- urgent data only"); 125 R(9, "- control"); 126 R(10, "- resends by PMTU discovery"); 127 L(11, "TCP Timers"); R(11, "total packets received"); 128 L(12, "potential rtt updates"); R(12, "- in sequence"); 129 L(13, "- successful"); R(13, "- completely duplicate"); 130 L(14, "delayed acks sent"); R(14, "- with some duplicate data"); 131 L(15, "retransmit timeouts"); R(15, "- out-of-order"); 132 L(16, "persist timeouts"); R(16, "- duplicate acks"); 133 L(17, "keepalive probes"); R(17, "- acks"); 134 L(18, "- timeouts"); R(18, "- window probes"); 135 R(19, "- window updates"); 136 R(20, "- bad checksum"); 137#undef L 138#undef R 139} 140 141static void 142domode(struct tcpstat *ret) 143{ 144 const struct tcpstat *sub; 145 int divisor = 1; 146 147 switch(currentmode) { 148 case display_RATE: 149 sub = &oldstat; 150 divisor = (delay > 1000000) ? delay / 1000000 : 1; 151 break; 152 case display_DELTA: 153 sub = &oldstat; 154 break; 155 case display_SINCE: 156 sub = &initstat; 157 break; 158 default: 159 *ret = curstat; 160 return; 161 } 162#define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor 163 DO(tcps_connattempt); 164 DO(tcps_accepts); 165 DO(tcps_connects); 166 DO(tcps_drops); 167 DO(tcps_conndrops); 168 DO(tcps_closed); 169 DO(tcps_segstimed); 170 DO(tcps_rttupdated); 171 DO(tcps_delack); 172 DO(tcps_timeoutdrop); 173 DO(tcps_rexmttimeo); 174 DO(tcps_persisttimeo); 175 DO(tcps_keeptimeo); 176 DO(tcps_keepprobe); 177 DO(tcps_keepdrops); 178 179 DO(tcps_sndtotal); 180 DO(tcps_sndpack); 181 DO(tcps_sndbyte); 182 DO(tcps_sndrexmitpack); 183 DO(tcps_sack_rexmits); 184 DO(tcps_sndacks); 185 DO(tcps_sndprobe); 186 DO(tcps_sndurg); 187 DO(tcps_sndwinup); 188 DO(tcps_sndctrl); 189 190 DO(tcps_rcvtotal); 191 DO(tcps_rcvpack); 192 DO(tcps_rcvbyte); 193 DO(tcps_rcvbadsum); 194 DO(tcps_rcvbadoff); 195 DO(tcps_rcvshort); 196 DO(tcps_rcvduppack); 197 DO(tcps_rcvdupbyte); 198 DO(tcps_rcvpartduppack); 199 DO(tcps_rcvpartdupbyte); 200 DO(tcps_rcvoopack); 201 DO(tcps_rcvoobyte); 202 DO(tcps_rcvpackafterwin); 203 DO(tcps_rcvbyteafterwin); 204 DO(tcps_rcvafterclose); 205 DO(tcps_rcvwinprobe); 206 DO(tcps_rcvdupack); 207 DO(tcps_rcvacktoomuch); 208 DO(tcps_rcvackpack); 209 DO(tcps_rcvackbyte); 210 DO(tcps_rcvwinupd); 211 DO(tcps_pawsdrop); 212 DO(tcps_predack); 213 DO(tcps_preddat); 214 DO(tcps_pcbcachemiss); 215 DO(tcps_cachedrtt); 216 DO(tcps_cachedrttvar); 217 DO(tcps_cachedssthresh); 218 DO(tcps_usedrtt); 219 DO(tcps_usedrttvar); 220 DO(tcps_usedssthresh); 221 DO(tcps_persistdrop); 222 DO(tcps_badsyn); 223 DO(tcps_mturesent); 224 DO(tcps_listendrop); 225#undef DO 226} 227 228void 229showtcp(void) 230{ 231 struct tcpstat stats; 232 233 memset(&stats, 0, sizeof stats); 234 domode(&stats); 235 236#define DO(stat, row, col) \ 237 mvwprintw(wnd, row, col, "%12lu", stats.stat) 238#define L(row, stat) DO(stat, row, 0) 239#define R(row, stat) DO(stat, row, 38) 240 L(1, tcps_connattempt); R(1, tcps_sndtotal); 241 L(2, tcps_accepts); R(2, tcps_sndpack); 242 L(3, tcps_connects); R(3, tcps_sndrexmitpack); 243 L(4, tcps_drops); R(4, tcps_sack_rexmits); 244 L(5, tcps_conndrops); R(5, tcps_sndacks); 245 L(6, tcps_timeoutdrop); R(6, tcps_sndprobe); 246 L(7, tcps_keepdrops); R(7, tcps_sndwinup); 247 L(8, tcps_listendrop); R(8, tcps_sndurg); 248 R(9, tcps_sndctrl); 249 R(10, tcps_mturesent); 250 R(11, tcps_rcvtotal); 251 L(12, tcps_segstimed); R(12, tcps_rcvpack); 252 L(13, tcps_rttupdated); R(13, tcps_rcvduppack); 253 L(14, tcps_delack); R(14, tcps_rcvpartduppack); 254 L(15, tcps_rexmttimeo); R(15, tcps_rcvoopack); 255 L(16, tcps_persisttimeo); R(16, tcps_rcvdupack); 256 L(17, tcps_keepprobe); R(17, tcps_rcvackpack); 257 L(18, tcps_keeptimeo); R(18, tcps_rcvwinprobe); 258 R(19, tcps_rcvwinupd); 259 R(20, tcps_rcvbadsum); 260#undef DO 261#undef L 262#undef R 263} 264 265int 266inittcp(void) 267{ 268 size_t len; 269 int name[4]; 270 271 name[0] = CTL_NET; 272 name[1] = PF_INET; 273 name[2] = IPPROTO_TCP; 274 name[3] = TCPCTL_STATS; 275 276 len = 0; 277 if (sysctl(name, 4, 0, &len, 0, 0) < 0) { 278 error("sysctl getting tcpstat size failed"); 279 return 0; 280 } 281 if (len > sizeof curstat) { 282 error("tcpstat structure has grown--recompile systat!"); 283 return 0; 284 } 285 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 286 error("sysctl getting tcpstat failed"); 287 return 0; 288 } 289 oldstat = initstat; 290 return 1; 291} 292 293void 294resettcp(void) 295{ 296 size_t len; 297 int name[4]; 298 299 name[0] = CTL_NET; 300 name[1] = PF_INET; 301 name[2] = IPPROTO_TCP; 302 name[3] = TCPCTL_STATS; 303 304 len = sizeof initstat; 305 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 306 error("sysctl getting tcpstat failed"); 307 } 308 oldstat = initstat; 309} 310 311void 312fetchtcp(void) 313{ 314 int name[4]; 315 size_t len; 316 317 oldstat = curstat; 318 name[0] = CTL_NET; 319 name[1] = PF_INET; 320 name[2] = IPPROTO_TCP; 321 name[3] = TCPCTL_STATS; 322 len = sizeof curstat; 323 324 if (sysctl(name, 4, &curstat, &len, 0, 0) < 0) 325 return; 326} 327