usr.bin/systat/tcp.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1980, 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #if 0
  33 #ifndef lint
  34 /* From: */
  35 static char sccsid[] = "@(#)mbufs.c     8.1 (Berkeley) 6/6/93";
  36 static const char rcsid[] =
  37         "Id: mbufs.c,v 1.5 1997/02/24 20:59:03 wollman Exp";
  38 #endif /* not lint */
  39 #endif
  40
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/param.h>
  45 #include <sys/types.h>
  46 #include <sys/socket.h>
  47 #include <sys/sysctl.h>
  48
  49 #include <netinet/in.h>
  50 #include <netinet/in_systm.h>
  51 #include <netinet/ip.h>
  52 #include <netinet/tcp.h>
  53 #include <netinet/tcp_seq.h>
  54 #include <netinet/tcp_fsm.h>
  55 #include <netinet/tcp_timer.h>
  56 #include <netinet/tcp_var.h>
  57
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <paths.h>
  61
  62 #include "systat.h"
  63 #include "extern.h"
  64 #include "mode.h"
  65
  66 static struct tcpstat curstat, initstat, oldstat;
  67
  68 /*-
  69 --0         1         2         3         4         5         6         7
  70 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  71 00             TCP Connections                       TCP Packets
  72 01999999999999 connections initiated    999999999999 total packets sent
  73 02999999999999 connections accepted     999999999999 - data
  74 03999999999999 connections established  999999999999 - data (retransmit by dupack)
  75 04999999999999 connections dropped      999999999999 - data (retransmit by sack)
  76 05999999999999 - in embryonic state     999999999999 - ack-only
  77 06999999999999 - on retransmit timeout  999999999999 - window probes
  78 07999999999999 - by keepalive           999999999999 - window updates
  79 08999999999999 - from listen queue      999999999999 - urgent data only
  80 09                                      999999999999 - control
  81 10                                      999999999999 - resends by PMTU discovery
  82 11             TCP Timers               999999999999 total packets received
  83 12999999999999 potential rtt updates    999999999999 - in sequence
  84 13999999999999 - successful             999999999999 - completely duplicate
  85 14999999999999 delayed acks sent        999999999999 - with some duplicate data
  86 15999999999999 retransmit timeouts      999999999999 - out-of-order
  87 16999999999999 persist timeouts         999999999999 - duplicate acks
  88 17999999999999 keepalive probes         999999999999 - acks
  89 18999999999999 - timeouts               999999999999 - window probes
  90 19                                      999999999999 - window updates
  91 20                                      999999999999 - bad checksum
  92 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  93 --0         1         2         3         4         5         6         7
  94 */
  95
  96 WINDOW *
  97 opentcp(void)
  98 {
  99         return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
 100 }
 101
 102 void
 103 closetcp(WINDOW *w)
 104 {
 105         if (w == NULL)
 106                 return;
 107         wclear(w);
 108         wrefresh(w);
 109         delwin(w);
 110 }
 111
 112 void
 113 labeltcp(void)
 114 {
 115         wmove(wnd, 0, 0); wclrtoeol(wnd);
 116 #define L(row, str) mvwprintw(wnd, row, 13, str)
 117 #define R(row, str) mvwprintw(wnd, row, 51, str);
 118         L(0, "TCP Connections");                R(0, "TCP Packets");
 119         L(1, "connections initiated");          R(1, "total packets sent");
 120         L(2, "connections accepted");           R(2, "- data");
 121         L(3, "connections established");        R(3, "- data (retransmit by dupack)");
 122         L(4, "connections dropped");            R(4, "- data (retransmit by sack)");
 123         L(5, "- in embryonic state");           R(5, "- ack-only");
 124         L(6, "- on retransmit timeout");        R(6, "- window probes");
 125         L(7, "- by keepalive");                 R(7, "- window updates");
 126         L(8, "- from listen queue");            R(8, "- urgent data only");
 127                                                 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
 143 static void
 144 domode(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 = (delay > 1000000) ? delay / 1000000 : 1;
 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_sack_rexmits);
 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
 230 void
 231 showtcp(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, "%12lu", stats.stat)
 240 #define L(row, stat) DO(stat, row, 0)
 241 #define R(row, stat) DO(stat, row, 38)
 242         L(1, tcps_connattempt);         R(1, tcps_sndtotal);
 243         L(2, tcps_accepts);             R(2, tcps_sndpack);
 244         L(3, tcps_connects);            R(3, tcps_sndrexmitpack);
 245         L(4, tcps_drops);               R(4, tcps_sack_rexmits);
 246         L(5, tcps_conndrops);           R(5, tcps_sndacks);
 247         L(6, tcps_timeoutdrop);         R(6, tcps_sndprobe);
 248         L(7, tcps_keepdrops);           R(7, tcps_sndwinup);
 249         L(8, tcps_listendrop);          R(8, tcps_sndurg);
 250                                         R(9, tcps_sndctrl);
 251                                         R(10, tcps_mturesent);
 252                                         R(11, tcps_rcvtotal);
 253         L(12, tcps_segstimed);          R(12, tcps_rcvpack);
 254         L(13, tcps_rttupdated);         R(13, tcps_rcvduppack);
 255         L(14, tcps_delack);             R(14, tcps_rcvpartduppack);
 256         L(15, tcps_rexmttimeo);         R(15, tcps_rcvoopack);
 257         L(16, tcps_persisttimeo);       R(16, tcps_rcvdupack);
 258         L(17, tcps_keepprobe);          R(17, tcps_rcvackpack);
 259         L(18, tcps_keeptimeo);          R(18, tcps_rcvwinprobe);
 260                                         R(19, tcps_rcvwinupd);
 261                                         R(20, tcps_rcvbadsum);
 262 #undef DO
 263 #undef L
 264 #undef R
 265 }
 266
 267 int
 268 inittcp(void)
 269 {
 270         size_t len;
 271         int name[4];
 272
 273         name[0] = CTL_NET;
 274         name[1] = PF_INET;
 275         name[2] = IPPROTO_TCP;
 276         name[3] = TCPCTL_STATS;
 277
 278         len = 0;
 279         if (sysctl(name, 4, 0, &len, 0, 0) < 0) {
 280                 error("sysctl getting tcpstat size failed");
 281                 return 0;
 282         }
 283         if (len > sizeof curstat) {
 284                 error("tcpstat structure has grown--recompile systat!");
 285                 return 0;
 286         }
 287         if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
 288                 error("sysctl getting tcpstat failed");
 289                 return 0;
 290         }
 291         oldstat = initstat;
 292         return 1;
 293 }
 294
 295 void
 296 resettcp(void)
 297 {
 298         size_t len;
 299         int name[4];
 300
 301         name[0] = CTL_NET;
 302         name[1] = PF_INET;
 303         name[2] = IPPROTO_TCP;
 304         name[3] = TCPCTL_STATS;
 305
 306         len = sizeof initstat;
 307         if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
 308                 error("sysctl getting tcpstat failed");
 309         }
 310         oldstat = initstat;
 311 }
 312
 313 void
 314 fetchtcp(void)
 315 {
 316         int name[4];
 317         size_t len;
 318
 319         oldstat = curstat;
 320         name[0] = CTL_NET;
 321         name[1] = PF_INET;
 322         name[2] = IPPROTO_TCP;
 323         name[3] = TCPCTL_STATS;
 324         len = sizeof curstat;
 325
 326         if (sysctl(name, 4, &curstat, &len, 0, 0) < 0)
 327                 return;
 328 }