tcp.c revision 170782
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#if 0 35#ifndef lint 36/* From: */ 37static char sccsid[] = "@(#)mbufs.c 8.1 (Berkeley) 6/6/93"; 38static const char rcsid[] = 39 "Id: mbufs.c,v 1.5 1997/02/24 20:59:03 wollman Exp"; 40#endif /* not lint */ 41#endif 42 43#include <sys/cdefs.h> 44__FBSDID("$FreeBSD: head/usr.bin/systat/tcp.c 170782 2007-06-15 18:00:10Z jhb $"); 45 46#include <sys/param.h> 47#include <sys/types.h> 48#include <sys/socket.h> 49#include <sys/sysctl.h> 50 51#include <netinet/in.h> 52#include <netinet/in_systm.h> 53#include <netinet/ip.h> 54#include <netinet/tcp.h> 55#include <netinet/tcp_seq.h> 56#include <netinet/tcp_fsm.h> 57#include <netinet/tcp_timer.h> 58#include <netinet/tcp_var.h> 59 60#include <stdlib.h> 61#include <string.h> 62#include <paths.h> 63 64#include "systat.h" 65#include "extern.h" 66#include "mode.h" 67 68static struct tcpstat curstat, initstat, oldstat; 69 70/*- 71--0 1 2 3 4 5 6 7 72--0123456789012345678901234567890123456789012345678901234567890123456789012345 7300 TCP Connections TCP Packets 7401999999999 connections initiated 999999999 total packets sent 7502999999999 connections accepted 999999999 - data 7603999999999 connections established 999999999 - data (retransmit by dupack) 7704999999999 connections dropped 999999999 - data (retransmit by sack) 7805999999999 - in embryonic state 999999999 - ack-only 7906999999999 - on retransmit timeout 999999999 - window probes 8007999999999 - by keepalive 999999999 - window updates 8108999999999 - from listen queue 999999999 - urgent data only 8209 999999999 - control 8310 999999999 - resends by PMTU discovery 8411 TCP Timers 999999999 total packets received 8512999999999 potential rtt updates 999999999 - in sequence 8613999999999 - successful 999999999 - completely duplicate 8714999999999 delayed acks sent 999999999 - with some duplicate data 8815999999999 retransmit timeouts 999999999 - out-of-order 8916999999999 persist timeouts 999999999 - duplicate acks 9017999999999 keepalive probes 999999999 - acks 9118999999999 - timeouts 999999999 - window probes 9219 999999999 - window updates 9320 999999999 - bad checksum 94--0123456789012345678901234567890123456789012345678901234567890123456789012345 95--0 1 2 3 4 5 6 7 96*/ 97 98WINDOW * 99opentcp(void) 100{ 101 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0)); 102} 103 104void 105closetcp(w) 106 WINDOW *w; 107{ 108 if (w == NULL) 109 return; 110 wclear(w); 111 wrefresh(w); 112 delwin(w); 113} 114 115void 116labeltcp(void) 117{ 118 wmove(wnd, 0, 0); wclrtoeol(wnd); 119#define L(row, str) mvwprintw(wnd, row, 10, str) 120#define R(row, str) mvwprintw(wnd, row, 45, str); 121 L(0, "TCP Connections"); R(0, "TCP Packets"); 122 L(1, "connections initiated"); R(1, "total packets sent"); 123 L(2, "connections accepted"); R(2, "- data"); 124 L(3, "connections established"); R(3, "- data (retransmit by dupack)"); 125 L(4, "connections dropped"); R(4, "- data (retransmit by sack)"); 126 L(5, "- in embryonic state"); R(5, "- ack-only"); 127 L(6, "- on retransmit timeout"); R(6, "- window probes"); 128 L(7, "- by keepalive"); R(7, "- window updates"); 129 L(8, "- from listen queue"); R(8, "- urgent data only"); 130 R(9, "- control"); 131 R(10, "- resends by PMTU discovery"); 132 L(11, "TCP Timers"); R(11, "total packets received"); 133 L(12, "potential rtt updates"); R(12, "- in sequence"); 134 L(13, "- successful"); R(13, "- completely duplicate"); 135 L(14, "delayed acks sent"); R(14, "- with some duplicate data"); 136 L(15, "retransmit timeouts"); R(15, "- out-of-order"); 137 L(16, "persist timeouts"); R(16, "- duplicate acks"); 138 L(17, "keepalive probes"); R(17, "- acks"); 139 L(18, "- timeouts"); R(18, "- window probes"); 140 R(19, "- window updates"); 141 R(20, "- bad checksum"); 142#undef L 143#undef R 144} 145 146static void 147domode(struct tcpstat *ret) 148{ 149 const struct tcpstat *sub; 150 int divisor = 1; 151 152 switch(currentmode) { 153 case display_RATE: 154 sub = &oldstat; 155 divisor = naptime; 156 break; 157 case display_DELTA: 158 sub = &oldstat; 159 break; 160 case display_SINCE: 161 sub = &initstat; 162 break; 163 default: 164 *ret = curstat; 165 return; 166 } 167#define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor 168 DO(tcps_connattempt); 169 DO(tcps_accepts); 170 DO(tcps_connects); 171 DO(tcps_drops); 172 DO(tcps_conndrops); 173 DO(tcps_closed); 174 DO(tcps_segstimed); 175 DO(tcps_rttupdated); 176 DO(tcps_delack); 177 DO(tcps_timeoutdrop); 178 DO(tcps_rexmttimeo); 179 DO(tcps_persisttimeo); 180 DO(tcps_keeptimeo); 181 DO(tcps_keepprobe); 182 DO(tcps_keepdrops); 183 184 DO(tcps_sndtotal); 185 DO(tcps_sndpack); 186 DO(tcps_sndbyte); 187 DO(tcps_sndrexmitpack); 188 DO(tcps_sack_rexmits); 189 DO(tcps_sndacks); 190 DO(tcps_sndprobe); 191 DO(tcps_sndurg); 192 DO(tcps_sndwinup); 193 DO(tcps_sndctrl); 194 195 DO(tcps_rcvtotal); 196 DO(tcps_rcvpack); 197 DO(tcps_rcvbyte); 198 DO(tcps_rcvbadsum); 199 DO(tcps_rcvbadoff); 200 DO(tcps_rcvshort); 201 DO(tcps_rcvduppack); 202 DO(tcps_rcvdupbyte); 203 DO(tcps_rcvpartduppack); 204 DO(tcps_rcvpartdupbyte); 205 DO(tcps_rcvoopack); 206 DO(tcps_rcvoobyte); 207 DO(tcps_rcvpackafterwin); 208 DO(tcps_rcvbyteafterwin); 209 DO(tcps_rcvafterclose); 210 DO(tcps_rcvwinprobe); 211 DO(tcps_rcvdupack); 212 DO(tcps_rcvacktoomuch); 213 DO(tcps_rcvackpack); 214 DO(tcps_rcvackbyte); 215 DO(tcps_rcvwinupd); 216 DO(tcps_pawsdrop); 217 DO(tcps_predack); 218 DO(tcps_preddat); 219 DO(tcps_pcbcachemiss); 220 DO(tcps_cachedrtt); 221 DO(tcps_cachedrttvar); 222 DO(tcps_cachedssthresh); 223 DO(tcps_usedrtt); 224 DO(tcps_usedrttvar); 225 DO(tcps_usedssthresh); 226 DO(tcps_persistdrop); 227 DO(tcps_badsyn); 228 DO(tcps_mturesent); 229 DO(tcps_listendrop); 230#undef DO 231} 232 233void 234showtcp(void) 235{ 236 struct tcpstat stats; 237 238 memset(&stats, 0, sizeof stats); 239 domode(&stats); 240 241#define DO(stat, row, col) \ 242 mvwprintw(wnd, row, col, "%9lu", stats.stat) 243#define L(row, stat) DO(stat, row, 0) 244#define R(row, stat) DO(stat, row, 35) 245 L(1, tcps_connattempt); R(1, tcps_sndtotal); 246 L(2, tcps_accepts); R(2, tcps_sndpack); 247 L(3, tcps_connects); R(3, tcps_sndrexmitpack); 248 L(4, tcps_drops); R(4, tcps_sack_rexmits); 249 L(5, tcps_conndrops); R(5, tcps_sndacks); 250 L(6, tcps_timeoutdrop); R(6, tcps_sndprobe); 251 L(7, tcps_keepdrops); R(7, tcps_sndwinup); 252 L(8, tcps_listendrop); R(8, tcps_sndurg); 253 R(9, tcps_sndctrl); 254 R(10, tcps_mturesent); 255 R(11, tcps_rcvtotal); 256 L(12, tcps_segstimed); R(12, tcps_rcvpack); 257 L(13, tcps_rttupdated); R(13, tcps_rcvduppack); 258 L(14, tcps_delack); R(14, tcps_rcvpartduppack); 259 L(15, tcps_rexmttimeo); R(15, tcps_rcvoopack); 260 L(16, tcps_persisttimeo); R(16, tcps_rcvdupack); 261 L(17, tcps_keepprobe); R(17, tcps_rcvackpack); 262 L(18, tcps_keeptimeo); R(18, tcps_rcvwinprobe); 263 R(19, tcps_rcvwinupd); 264 R(20, tcps_rcvbadsum); 265#undef DO 266#undef L 267#undef R 268} 269 270int 271inittcp(void) 272{ 273 size_t len; 274 int name[4]; 275 276 name[0] = CTL_NET; 277 name[1] = PF_INET; 278 name[2] = IPPROTO_TCP; 279 name[3] = TCPCTL_STATS; 280 281 len = 0; 282 if (sysctl(name, 4, 0, &len, 0, 0) < 0) { 283 error("sysctl getting tcpstat size failed"); 284 return 0; 285 } 286 if (len > sizeof curstat) { 287 error("tcpstat structure has grown--recompile systat!"); 288 return 0; 289 } 290 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 291 error("sysctl getting tcpstat failed"); 292 return 0; 293 } 294 oldstat = initstat; 295 return 1; 296} 297 298void 299resettcp(void) 300{ 301 size_t len; 302 int name[4]; 303 304 name[0] = CTL_NET; 305 name[1] = PF_INET; 306 name[2] = IPPROTO_TCP; 307 name[3] = TCPCTL_STATS; 308 309 len = sizeof initstat; 310 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 311 error("sysctl getting tcpstat failed"); 312 } 313 oldstat = initstat; 314} 315 316void 317fetchtcp(void) 318{ 319 int name[4]; 320 size_t len; 321 322 oldstat = curstat; 323 name[0] = CTL_NET; 324 name[1] = PF_INET; 325 name[2] = IPPROTO_TCP; 326 name[3] = TCPCTL_STATS; 327 len = sizeof curstat; 328 329 if (sysctl(name, 4, &curstat, &len, 0, 0) < 0) 330 return; 331} 332 333