tcp.c revision 175387
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 175387 2008-01-16 19:27:43Z delphij $"); 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 7401999999999999 connections initiated 999999999999 total packets sent 7502999999999999 connections accepted 999999999999 - data 7603999999999999 connections established 999999999999 - data (retransmit by dupack) 7704999999999999 connections dropped 999999999999 - data (retransmit by sack) 7805999999999999 - in embryonic state 999999999999 - ack-only 7906999999999999 - on retransmit timeout 999999999999 - window probes 8007999999999999 - by keepalive 999999999999 - window updates 8108999999999999 - from listen queue 999999999999 - urgent data only 8209 999999999999 - control 8310 999999999999 - resends by PMTU discovery 8411 TCP Timers 999999999999 total packets received 8512999999999999 potential rtt updates 999999999999 - in sequence 8613999999999999 - successful 999999999999 - completely duplicate 8714999999999999 delayed acks sent 999999999999 - with some duplicate data 8815999999999999 retransmit timeouts 999999999999 - out-of-order 8916999999999999 persist timeouts 999999999999 - duplicate acks 9017999999999999 keepalive probes 999999999999 - acks 9118999999999999 - timeouts 999999999999 - window probes 9219 999999999999 - window updates 9320 999999999999 - 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(WINDOW *w) 106{ 107 if (w == NULL) 108 return; 109 wclear(w); 110 wrefresh(w); 111 delwin(w); 112} 113 114void 115labeltcp(void) 116{ 117 wmove(wnd, 0, 0); wclrtoeol(wnd); 118#define L(row, str) mvwprintw(wnd, row, 13, str) 119#define R(row, str) mvwprintw(wnd, row, 51, str); 120 L(0, "TCP Connections"); R(0, "TCP Packets"); 121 L(1, "connections initiated"); R(1, "total packets sent"); 122 L(2, "connections accepted"); R(2, "- data"); 123 L(3, "connections established"); R(3, "- data (retransmit by dupack)"); 124 L(4, "connections dropped"); R(4, "- data (retransmit by sack)"); 125 L(5, "- in embryonic state"); R(5, "- ack-only"); 126 L(6, "- on retransmit timeout"); R(6, "- window probes"); 127 L(7, "- by keepalive"); R(7, "- window updates"); 128 L(8, "- from listen queue"); R(8, "- urgent data only"); 129 R(9, "- control"); 130 R(10, "- resends by PMTU discovery"); 131 L(11, "TCP Timers"); R(11, "total packets received"); 132 L(12, "potential rtt updates"); R(12, "- in sequence"); 133 L(13, "- successful"); R(13, "- completely duplicate"); 134 L(14, "delayed acks sent"); R(14, "- with some duplicate data"); 135 L(15, "retransmit timeouts"); R(15, "- out-of-order"); 136 L(16, "persist timeouts"); R(16, "- duplicate acks"); 137 L(17, "keepalive probes"); R(17, "- acks"); 138 L(18, "- timeouts"); R(18, "- window probes"); 139 R(19, "- window updates"); 140 R(20, "- bad checksum"); 141#undef L 142#undef R 143} 144 145static void 146domode(struct tcpstat *ret) 147{ 148 const struct tcpstat *sub; 149 int divisor = 1; 150 151 switch(currentmode) { 152 case display_RATE: 153 sub = &oldstat; 154 divisor = naptime; 155 break; 156 case display_DELTA: 157 sub = &oldstat; 158 break; 159 case display_SINCE: 160 sub = &initstat; 161 break; 162 default: 163 *ret = curstat; 164 return; 165 } 166#define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor 167 DO(tcps_connattempt); 168 DO(tcps_accepts); 169 DO(tcps_connects); 170 DO(tcps_drops); 171 DO(tcps_conndrops); 172 DO(tcps_closed); 173 DO(tcps_segstimed); 174 DO(tcps_rttupdated); 175 DO(tcps_delack); 176 DO(tcps_timeoutdrop); 177 DO(tcps_rexmttimeo); 178 DO(tcps_persisttimeo); 179 DO(tcps_keeptimeo); 180 DO(tcps_keepprobe); 181 DO(tcps_keepdrops); 182 183 DO(tcps_sndtotal); 184 DO(tcps_sndpack); 185 DO(tcps_sndbyte); 186 DO(tcps_sndrexmitpack); 187 DO(tcps_sack_rexmits); 188 DO(tcps_sndacks); 189 DO(tcps_sndprobe); 190 DO(tcps_sndurg); 191 DO(tcps_sndwinup); 192 DO(tcps_sndctrl); 193 194 DO(tcps_rcvtotal); 195 DO(tcps_rcvpack); 196 DO(tcps_rcvbyte); 197 DO(tcps_rcvbadsum); 198 DO(tcps_rcvbadoff); 199 DO(tcps_rcvshort); 200 DO(tcps_rcvduppack); 201 DO(tcps_rcvdupbyte); 202 DO(tcps_rcvpartduppack); 203 DO(tcps_rcvpartdupbyte); 204 DO(tcps_rcvoopack); 205 DO(tcps_rcvoobyte); 206 DO(tcps_rcvpackafterwin); 207 DO(tcps_rcvbyteafterwin); 208 DO(tcps_rcvafterclose); 209 DO(tcps_rcvwinprobe); 210 DO(tcps_rcvdupack); 211 DO(tcps_rcvacktoomuch); 212 DO(tcps_rcvackpack); 213 DO(tcps_rcvackbyte); 214 DO(tcps_rcvwinupd); 215 DO(tcps_pawsdrop); 216 DO(tcps_predack); 217 DO(tcps_preddat); 218 DO(tcps_pcbcachemiss); 219 DO(tcps_cachedrtt); 220 DO(tcps_cachedrttvar); 221 DO(tcps_cachedssthresh); 222 DO(tcps_usedrtt); 223 DO(tcps_usedrttvar); 224 DO(tcps_usedssthresh); 225 DO(tcps_persistdrop); 226 DO(tcps_badsyn); 227 DO(tcps_mturesent); 228 DO(tcps_listendrop); 229#undef DO 230} 231 232void 233showtcp(void) 234{ 235 struct tcpstat stats; 236 237 memset(&stats, 0, sizeof stats); 238 domode(&stats); 239 240#define DO(stat, row, col) \ 241 mvwprintw(wnd, row, col, "%12lu", stats.stat) 242#define L(row, stat) DO(stat, row, 0) 243#define R(row, stat) DO(stat, row, 38) 244 L(1, tcps_connattempt); R(1, tcps_sndtotal); 245 L(2, tcps_accepts); R(2, tcps_sndpack); 246 L(3, tcps_connects); R(3, tcps_sndrexmitpack); 247 L(4, tcps_drops); R(4, tcps_sack_rexmits); 248 L(5, tcps_conndrops); R(5, tcps_sndacks); 249 L(6, tcps_timeoutdrop); R(6, tcps_sndprobe); 250 L(7, tcps_keepdrops); R(7, tcps_sndwinup); 251 L(8, tcps_listendrop); R(8, tcps_sndurg); 252 R(9, tcps_sndctrl); 253 R(10, tcps_mturesent); 254 R(11, tcps_rcvtotal); 255 L(12, tcps_segstimed); R(12, tcps_rcvpack); 256 L(13, tcps_rttupdated); R(13, tcps_rcvduppack); 257 L(14, tcps_delack); R(14, tcps_rcvpartduppack); 258 L(15, tcps_rexmttimeo); R(15, tcps_rcvoopack); 259 L(16, tcps_persisttimeo); R(16, tcps_rcvdupack); 260 L(17, tcps_keepprobe); R(17, tcps_rcvackpack); 261 L(18, tcps_keeptimeo); R(18, tcps_rcvwinprobe); 262 R(19, tcps_rcvwinupd); 263 R(20, tcps_rcvbadsum); 264#undef DO 265#undef L 266#undef R 267} 268 269int 270inittcp(void) 271{ 272 size_t len; 273 int name[4]; 274 275 name[0] = CTL_NET; 276 name[1] = PF_INET; 277 name[2] = IPPROTO_TCP; 278 name[3] = TCPCTL_STATS; 279 280 len = 0; 281 if (sysctl(name, 4, 0, &len, 0, 0) < 0) { 282 error("sysctl getting tcpstat size failed"); 283 return 0; 284 } 285 if (len > sizeof curstat) { 286 error("tcpstat structure has grown--recompile systat!"); 287 return 0; 288 } 289 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 290 error("sysctl getting tcpstat failed"); 291 return 0; 292 } 293 oldstat = initstat; 294 return 1; 295} 296 297void 298resettcp(void) 299{ 300 size_t len; 301 int name[4]; 302 303 name[0] = CTL_NET; 304 name[1] = PF_INET; 305 name[2] = IPPROTO_TCP; 306 name[3] = TCPCTL_STATS; 307 308 len = sizeof initstat; 309 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 310 error("sysctl getting tcpstat failed"); 311 } 312 oldstat = initstat; 313} 314 315void 316fetchtcp(void) 317{ 318 int name[4]; 319 size_t len; 320 321 oldstat = curstat; 322 name[0] = CTL_NET; 323 name[1] = PF_INET; 324 name[2] = IPPROTO_TCP; 325 name[3] = TCPCTL_STATS; 326 len = sizeof curstat; 327 328 if (sysctl(name, 4, &curstat, &len, 0, 0) < 0) 329 return; 330} 331 332