usr.bin/systat/tcp.c

   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: */
  33 static char sccsid[] = "@(#)mbufs.c     8.1 (Berkeley) 6/6/93";
  34 static 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("$FreeBSD$");
  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
  64 static struct tcpstat curstat, initstat, oldstat;
  65
  66 /*-
  67 --0         1         2         3         4         5         6         7
  68 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  69 00             TCP Connections                       TCP Packets
  70 01999999999999 connections initiated    999999999999 total packets sent
  71 02999999999999 connections accepted     999999999999 - data
  72 03999999999999 connections established  999999999999 - data (retransmit by dupack)
  73 04999999999999 connections dropped      999999999999 - data (retransmit by sack)
  74 05999999999999 - in embryonic state     999999999999 - ack-only
  75 06999999999999 - on retransmit timeout  999999999999 - window probes
  76 07999999999999 - by keepalive           999999999999 - window updates
  77 08999999999999 - from listen queue      999999999999 - urgent data only
  78 09                                      999999999999 - control
  79 10                                      999999999999 - resends by PMTU discovery
  80 11             TCP Timers               999999999999 total packets received
  81 12999999999999 potential rtt updates    999999999999 - in sequence
  82 13999999999999 - successful             999999999999 - completely duplicate
  83 14999999999999 delayed acks sent        999999999999 - with some duplicate data
  84 15999999999999 retransmit timeouts      999999999999 - out-of-order
  85 16999999999999 persist timeouts         999999999999 - duplicate acks
  86 17999999999999 keepalive probes         999999999999 - acks
  87 18999999999999 - timeouts               999999999999 - window probes
  88 19                                      999999999999 - window updates
  89 20                                      999999999999 - bad checksum
  90 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  91 --0         1         2         3         4         5         6         7
  92 */
  93
  94 WINDOW *
  95 opentcp(void)
  96 {
  97         return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
  98 }
  99
 100 void
 101 closetcp(WINDOW *w)
 102 {
 103         if (w == NULL)
 104                 return;
 105         wclear(w);
 106         wrefresh(w);
 107         delwin(w);
 108 }
 109
 110 void
 111 labeltcp(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
 141 static void
 142 domode(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
 228 void
 229 showtcp(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
 265 int
 266 inittcp(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
 293 void
 294 resettcp(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
 311 void
 312 fetchtcp(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