tcp.c revision 87715
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#include <sys/cdefs.h> 35 36__FBSDID("$FreeBSD: head/usr.bin/systat/tcp.c 87715 2001-12-12 00:13:37Z markm $"); 37 38/* From: 39 "@(#)mbufs.c 8.1 (Berkeley) 6/6/93" 40 "Id: mbufs.c,v 1.5 1997/02/24 20:59:03 wollman Exp" 41*/ 42 43#include <sys/param.h> 44#include <sys/types.h> 45#include <sys/socket.h> 46#include <sys/sysctl.h> 47 48#include <net/route.h> 49 50#include <netinet/in.h> 51#include <netinet/in_systm.h> 52#include <netinet/ip.h> 53#include <netinet/tcp.h> 54#include <netinet/tcp_seq.h> 55#include <netinet/tcp_fsm.h> 56#include <netinet/tcp_timer.h> 57#include <netinet/tcp_var.h> 58 59#include <stdlib.h> 60#include <string.h> 61#include <paths.h> 62 63#include "systat.h" 64#include "extern.h" 65#include "mode.h" 66 67static struct tcpstat curstat, initstat, oldstat; 68 69/*- 70--0 1 2 3 4 5 6 7 71--0123456789012345678901234567890123456789012345678901234567890123456789012345 7201 TCP Connections TCP Packets 7302999999999 connections initiated 999999999 total packets sent 7403999999999 connections accepted 999999999 - data 7504999999999 connections established 999999999 - data (retransmit) 7605999999999 connections dropped 999999999 - ack-only 7706999999999 - in embryonic state 999999999 - window probes 7807999999999 - on retransmit timeout 999999999 - window updates 7908999999999 - by keepalive 999999999 - urgent data only 8009999999999 - from listen queue 999999999 - control 8110 999999999 - resends by PMTU discovery 8211 TCP Timers 999999999 total packets received 8312999999999 potential rtt updates 999999999 - in sequence 8413999999999 - successful 999999999 - completely duplicate 8514999999999 delayed acks sent 999999999 - with some duplicate data 8615999999999 retransmit timeouts 999999999 - out-of-order 8716999999999 persist timeouts 999999999 - duplicate acks 8817999999999 keepalive probes 999999999 - acks 8918999999999 - timeouts 999999999 - window probes 9019 999999999 - window updates 9120 999999999 - bad checksum 92--0123456789012345678901234567890123456789012345678901234567890123456789012345 93--0 1 2 3 4 5 6 7 94*/ 95 96WINDOW * 97opentcp(void) 98{ 99 100 return (stdscr); 101} 102 103void 104closetcp(w) 105 WINDOW *w; 106{ 107 if (w == NULL) 108 return; 109 wclear(w); 110 wrefresh(w); 111} 112 113void 114labeltcp(void) 115{ 116 wmove(wnd, 0, 0); wclrtoeol(wnd); 117#define L(row, str) mvwprintw(wnd, row, 10, str) 118#define R(row, str) mvwprintw(wnd, row, 45, str); 119 L(1, "TCP Connections"); R(1, "TCP Packets"); 120 L(2, "connections initiated"); R(2, "total packets sent"); 121 L(3, "connections accepted"); R(3, "- data"); 122 L(4, "connections established"); R(4, "- data (retransmit)"); 123 L(5, "connections dropped"); R(5, "- ack-only"); 124 L(6, "- in embryonic state"); R(6, "- window probes"); 125 L(7, "- on retransmit timeout"); R(7, "- window updates"); 126 L(8, "- by keepalive"); R(8, "- urgent data only"); 127 L(9, "- from listen queue"); R(9, "- control"); 128 R(10, "- resends by PMTU discovery"); 129 L(11, "TCP Timers"); R(11, "total packets received"); 130 L(12, "potential rtt updates"); R(12, "- in sequence"); 131 L(13, "- successful"); R(13, "- completely duplicate"); 132 L(14, "delayed acks sent"); R(14, "- with some duplicate data"); 133 L(15, "retransmit timeouts"); R(15, "- out-of-order"); 134 L(16, "persist timeouts"); R(16, "- duplicate acks"); 135 L(17, "keepalive probes"); R(17, "- acks"); 136 L(18, "- timeouts"); R(18, "- window probes"); 137 R(19, "- window updates"); 138 R(20, "- bad checksum"); 139#undef L 140#undef R 141} 142 143static void 144domode(struct tcpstat *ret) 145{ 146 const struct tcpstat *sub; 147 int divisor = 1; 148 149 switch(currentmode) { 150 case display_RATE: 151 sub = &oldstat; 152 divisor = naptime; 153 break; 154 case display_DELTA: 155 sub = &oldstat; 156 break; 157 case display_SINCE: 158 sub = &initstat; 159 break; 160 default: 161 *ret = curstat; 162 return; 163 } 164#define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor 165 DO(tcps_connattempt); 166 DO(tcps_accepts); 167 DO(tcps_connects); 168 DO(tcps_drops); 169 DO(tcps_conndrops); 170 DO(tcps_closed); 171 DO(tcps_segstimed); 172 DO(tcps_rttupdated); 173 DO(tcps_delack); 174 DO(tcps_timeoutdrop); 175 DO(tcps_rexmttimeo); 176 DO(tcps_persisttimeo); 177 DO(tcps_keeptimeo); 178 DO(tcps_keepprobe); 179 DO(tcps_keepdrops); 180 181 DO(tcps_sndtotal); 182 DO(tcps_sndpack); 183 DO(tcps_sndbyte); 184 DO(tcps_sndrexmitpack); 185 DO(tcps_sndrexmitbyte); 186 DO(tcps_sndacks); 187 DO(tcps_sndprobe); 188 DO(tcps_sndurg); 189 DO(tcps_sndwinup); 190 DO(tcps_sndctrl); 191 192 DO(tcps_rcvtotal); 193 DO(tcps_rcvpack); 194 DO(tcps_rcvbyte); 195 DO(tcps_rcvbadsum); 196 DO(tcps_rcvbadoff); 197 DO(tcps_rcvshort); 198 DO(tcps_rcvduppack); 199 DO(tcps_rcvdupbyte); 200 DO(tcps_rcvpartduppack); 201 DO(tcps_rcvpartdupbyte); 202 DO(tcps_rcvoopack); 203 DO(tcps_rcvoobyte); 204 DO(tcps_rcvpackafterwin); 205 DO(tcps_rcvbyteafterwin); 206 DO(tcps_rcvafterclose); 207 DO(tcps_rcvwinprobe); 208 DO(tcps_rcvdupack); 209 DO(tcps_rcvacktoomuch); 210 DO(tcps_rcvackpack); 211 DO(tcps_rcvackbyte); 212 DO(tcps_rcvwinupd); 213 DO(tcps_pawsdrop); 214 DO(tcps_predack); 215 DO(tcps_preddat); 216 DO(tcps_pcbcachemiss); 217 DO(tcps_cachedrtt); 218 DO(tcps_cachedrttvar); 219 DO(tcps_cachedssthresh); 220 DO(tcps_usedrtt); 221 DO(tcps_usedrttvar); 222 DO(tcps_usedssthresh); 223 DO(tcps_persistdrop); 224 DO(tcps_badsyn); 225 DO(tcps_mturesent); 226 DO(tcps_listendrop); 227#undef DO 228} 229 230void 231showtcp(void) 232{ 233 struct tcpstat stats; 234 235 memset(&stats, 0, sizeof stats); 236 domode(&stats); 237 238#define DO(stat, row, col) \ 239 mvwprintw(wnd, row, col, "%9lu", stats.stat) 240#define L(row, stat) DO(stat, row, 0) 241#define R(row, stat) DO(stat, row, 35) 242 L(2, tcps_connattempt); R(2, tcps_sndtotal); 243 L(3, tcps_accepts); R(3, tcps_sndpack); 244 L(4, tcps_connects); R(4, tcps_sndrexmitpack); 245 L(5, tcps_drops); R(5, tcps_sndacks); 246 L(6, tcps_conndrops); R(6, tcps_sndprobe); 247 L(7, tcps_timeoutdrop); R(7, tcps_sndwinup); 248 L(8, tcps_keepdrops); R(8, tcps_sndurg); 249 L(9, tcps_listendrop); R(9, tcps_sndctrl); 250 R(10, tcps_mturesent); 251 R(11, tcps_rcvtotal); 252 L(12, tcps_segstimed); R(12, tcps_rcvpack); 253 L(13, tcps_rttupdated); R(13, tcps_rcvduppack); 254 L(14, tcps_delack); R(14, tcps_rcvpartduppack); 255 L(15, tcps_rexmttimeo); R(15, tcps_rcvoopack); 256 L(16, tcps_persisttimeo); R(16, tcps_rcvdupack); 257 L(17, tcps_keepprobe); R(17, tcps_rcvackpack); 258 L(18, tcps_keeptimeo); R(18, tcps_rcvwinprobe); 259 R(19, tcps_rcvwinupd); 260 R(20, tcps_rcvbadsum); 261#undef DO 262#undef L 263#undef R 264} 265 266int 267inittcp(void) 268{ 269 size_t len; 270 int name[4]; 271 272 name[0] = CTL_NET; 273 name[1] = PF_INET; 274 name[2] = IPPROTO_TCP; 275 name[3] = TCPCTL_STATS; 276 277 len = 0; 278 if (sysctl(name, 4, 0, &len, 0, 0) < 0) { 279 error("sysctl getting tcpstat size failed"); 280 return 0; 281 } 282 if (len > sizeof curstat) { 283 error("tcpstat structure has grown--recompile systat!"); 284 return 0; 285 } 286 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 287 error("sysctl getting tcpstat failed"); 288 return 0; 289 } 290 oldstat = initstat; 291 return 1; 292} 293 294void 295resettcp(void) 296{ 297 size_t len; 298 int name[4]; 299 300 name[0] = CTL_NET; 301 name[1] = PF_INET; 302 name[2] = IPPROTO_TCP; 303 name[3] = TCPCTL_STATS; 304 305 len = sizeof initstat; 306 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 307 error("sysctl getting tcpstat failed"); 308 } 309 oldstat = initstat; 310} 311 312void 313fetchtcp(void) 314{ 315 int name[4]; 316 size_t len; 317 318 oldstat = curstat; 319 name[0] = CTL_NET; 320 name[1] = PF_INET; 321 name[2] = IPPROTO_TCP; 322 name[3] = TCPCTL_STATS; 323 len = sizeof curstat; 324 325 if (sysctl(name, 4, &curstat, &len, 0, 0) < 0) 326 return; 327} 328 329