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  * 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  * @(#)mbufs.c  8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/systat/tcp.c,v 1.3 1999/08/28 01:06:06 peter Exp $
  35  * $DragonFly: src/usr.bin/systat/tcp.c,v 1.2 2003/06/17 04:29:32 dillon Exp $
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/types.h>
  40 #include <sys/socket.h>
  41 #include <sys/sysctl.h>
  42
  43 #include <netinet/in.h>
  44 #include <netinet/in_systm.h>
  45 #include <netinet/ip.h>
  46 #include <netinet/tcp.h>
  47 #include <netinet/tcp_seq.h>
  48 #include <netinet/tcp_fsm.h>
  49 #include <netinet/tcp_timer.h>
  50 #include <netinet/tcp_var.h>
  51
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <paths.h>
  55 #include "systat.h"
  56 #include "extern.h"
  57 #include "mode.h"
  58
  59 static struct tcpstat curstat, initstat, oldstat;
  60
  61 /*-
  62 --0         1         2         3         4         5         6         7
  63 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  64 01          TCP Connections                    TCP Packets
  65 02999999999 connections initiated    999999999 total packets sent
  66 03999999999 connections accepted     999999999 - data
  67 04999999999 connections established  999999999 - data (retransmit)
  68 05999999999 connections dropped      999999999 - ack-only
  69 06999999999 - in embryonic state     999999999 - window probes
  70 07999999999 - on retransmit timeout  999999999 - window updates
  71 08999999999 - by keepalive           999999999 - urgent data only
  72 09999999999 - from listen queue      999999999 - control
  73 10                                   999999999 - resends by PMTU discovery
  74 11          TCP Timers               999999999 total packets received
  75 12999999999 potential rtt updates    999999999 - in sequence
  76 13999999999 - successful             999999999 - completely duplicate
  77 14999999999 delayed acks sent        999999999 - with some duplicate data
  78 15999999999 retransmit timeouts      999999999 - out-of-order
  79 16999999999 persist timeouts         999999999 - duplicate acks
  80 17999999999 keepalive probes         999999999 - acks
  81 18999999999 - timeouts               999999999 - window probes
  82 19                                   999999999 - window updates
  83 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  84 --0         1         2         3         4         5         6         7
  85 */
  86
  87 WINDOW *
  88 opentcp(void)
  89 {
  90         return (subwin(stdscr, LINES-5-1, 0, 5, 0));
  91 }
  92
  93 void
  94 closetcp(w)
  95         WINDOW *w;
  96 {
  97         if (w == NULL)
  98                 return;
  99         wclear(w);
 100         wrefresh(w);
 101         delwin(w);
 102 }
 103
 104 void
 105 labeltcp(void)
 106 {
 107         wmove(wnd, 0, 0); wclrtoeol(wnd);
 108 #define L(row, str) mvwprintw(wnd, row, 10, str)
 109 #define R(row, str) mvwprintw(wnd, row, 45, str);
 110         L(1, "TCP Connections");                R(1, "TCP Packets");
 111         L(2, "connections initiated");          R(2, "total packets sent");
 112         L(3, "connections accepted");           R(3, "- data");
 113         L(4, "connections established");        R(4, "- data (retransmit)");
 114         L(5, "connections dropped");            R(5, "- ack-only");
 115         L(6, "- in embryonic state");           R(6, "- window probes");
 116         L(7, "- on retransmit timeout");        R(7, "- window updates");
 117         L(8, "- by keepalive");                 R(8, "- urgent data only");
 118         L(9, "- from listen queue");            R(9, "- control");
 119         R(10, "- resends by PMTU discovery");
 120         L(11, "TCP Timers");            R(11, "total packets received");
 121         L(12, "potential rtt updates");         R(12, "- in sequence");
 122         L(13, "- successful");          R(13, "- completely duplicate");
 123         L(14, "delayed acks sent");     R(14, "- with some duplicate data");
 124         L(15, "retransmit timeouts");   R(15, "- out-of-order");
 125         L(16, "persist timeouts");      R(16, "- duplicate acks");
 126         L(17, "keepalive probes");      R(17, "- acks");
 127         L(18, "- timeouts");            R(18, "- window probes");
 128         R(19, "- window updates");
 129 #undef L
 130 #undef R
 131 }
 132
 133 static void
 134 domode(struct tcpstat *ret)
 135 {
 136         const struct tcpstat *sub;
 137         int divisor = 1;
 138
 139         switch(currentmode) {
 140         case display_RATE:
 141                 sub = &oldstat;
 142                 divisor = naptime;
 143                 break;
 144         case display_DELTA:
 145                 sub = &oldstat;
 146                 break;
 147         case display_SINCE:
 148                 sub = &initstat;
 149                 break;
 150         default:
 151                 *ret = curstat;
 152                 return;
 153         }
 154 #define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor
 155         DO(tcps_connattempt);
 156         DO(tcps_accepts);
 157         DO(tcps_connects);
 158         DO(tcps_drops);
 159         DO(tcps_conndrops);
 160         DO(tcps_closed);
 161         DO(tcps_segstimed);
 162         DO(tcps_rttupdated);
 163         DO(tcps_delack);
 164         DO(tcps_timeoutdrop);
 165         DO(tcps_rexmttimeo);
 166         DO(tcps_persisttimeo);
 167         DO(tcps_keeptimeo);
 168         DO(tcps_keepprobe);
 169         DO(tcps_keepdrops);
 170
 171         DO(tcps_sndtotal);
 172         DO(tcps_sndpack);
 173         DO(tcps_sndbyte);
 174         DO(tcps_sndrexmitpack);
 175         DO(tcps_sndrexmitbyte);
 176         DO(tcps_sndacks);
 177         DO(tcps_sndprobe);
 178         DO(tcps_sndurg);
 179         DO(tcps_sndwinup);
 180         DO(tcps_sndctrl);
 181
 182         DO(tcps_rcvtotal);
 183         DO(tcps_rcvpack);
 184         DO(tcps_rcvbyte);
 185         DO(tcps_rcvbadsum);
 186         DO(tcps_rcvbadoff);
 187         DO(tcps_rcvshort);
 188         DO(tcps_rcvduppack);
 189         DO(tcps_rcvdupbyte);
 190         DO(tcps_rcvpartduppack);
 191         DO(tcps_rcvpartdupbyte);
 192         DO(tcps_rcvoopack);
 193         DO(tcps_rcvoobyte);
 194         DO(tcps_rcvpackafterwin);
 195         DO(tcps_rcvbyteafterwin);
 196         DO(tcps_rcvafterclose);
 197         DO(tcps_rcvwinprobe);
 198         DO(tcps_rcvdupack);
 199         DO(tcps_rcvacktoomuch);
 200         DO(tcps_rcvackpack);
 201         DO(tcps_rcvackbyte);
 202         DO(tcps_rcvwinupd);
 203         DO(tcps_pawsdrop);
 204         DO(tcps_predack);
 205         DO(tcps_preddat);
 206         DO(tcps_pcbcachemiss);
 207         DO(tcps_cachedrtt);
 208         DO(tcps_cachedrttvar);
 209         DO(tcps_cachedssthresh);
 210         DO(tcps_usedrtt);
 211         DO(tcps_usedrttvar);
 212         DO(tcps_usedssthresh);
 213         DO(tcps_persistdrop);
 214         DO(tcps_badsyn);
 215         DO(tcps_mturesent);
 216         DO(tcps_listendrop);
 217 #undef DO
 218 }
 219
 220 void
 221 showtcp(void)
 222 {
 223         struct tcpstat stats;
 224
 225         memset(&stats, 0, sizeof stats);
 226         domode(&stats);
 227
 228 #define DO(stat, row, col) \
 229         mvwprintw(wnd, row, col, "%9lu", stats.stat)
 230 #define L(row, stat) DO(stat, row, 0)
 231 #define R(row, stat) DO(stat, row, 35)
 232         L(2, tcps_connattempt);         R(2, tcps_sndtotal);
 233         L(3, tcps_accepts);             R(3, tcps_sndpack);
 234         L(4, tcps_connects);            R(4, tcps_sndrexmitpack);
 235         L(5, tcps_drops);               R(5, tcps_sndacks);
 236         L(6, tcps_conndrops);           R(6, tcps_sndprobe);
 237         L(7, tcps_timeoutdrop);         R(7, tcps_sndwinup);
 238         L(8, tcps_keepdrops);           R(8, tcps_sndurg);
 239         L(9, tcps_listendrop);          R(9, tcps_sndctrl);
 240         R(10, tcps_mturesent);
 241         R(11, tcps_rcvtotal);
 242         L(12, tcps_segstimed);          R(12, tcps_rcvpack);
 243         L(13, tcps_rttupdated);         R(13, tcps_rcvduppack);
 244         L(14, tcps_delack);             R(14, tcps_rcvpartduppack);
 245         L(15, tcps_rexmttimeo);         R(15, tcps_rcvoopack);
 246         L(16, tcps_persisttimeo);       R(16, tcps_rcvdupack);
 247         L(17, tcps_keepprobe);          R(17, tcps_rcvackpack);
 248         L(18, tcps_keeptimeo);          R(18, tcps_rcvwinprobe);
 249         R(19, tcps_rcvwinupd);
 250 #undef DO
 251 #undef L
 252 #undef R
 253 }
 254
 255 int
 256 inittcp(void)
 257 {
 258         size_t len;
 259         int name[4];
 260
 261         name[0] = CTL_NET;
 262         name[1] = PF_INET;
 263         name[2] = IPPROTO_TCP;
 264         name[3] = TCPCTL_STATS;
 265
 266         len = 0;
 267         if (sysctl(name, 4, 0, &len, 0, 0) < 0) {
 268                 error("sysctl getting tcpstat size failed");
 269                 return 0;
 270         }
 271         if (len > sizeof curstat) {
 272                 error("tcpstat structure has grown--recompile systat!");
 273                 return 0;
 274         }
 275         if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
 276                 error("sysctl getting tcpstat failed");
 277                 return 0;
 278         }
 279         oldstat = initstat;
 280         return 1;
 281 }
 282
 283 void
 284 resettcp(void)
 285 {
 286         size_t len;
 287         int name[4];
 288
 289         name[0] = CTL_NET;
 290         name[1] = PF_INET;
 291         name[2] = IPPROTO_TCP;
 292         name[3] = TCPCTL_STATS;
 293
 294         len = sizeof initstat;
 295         if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
 296                 error("sysctl getting tcpstat failed");
 297         }
 298         oldstat = initstat;
 299 }
 300
 301 void
 302 fetchtcp(void)
 303 {
 304         int name[4];
 305         size_t len;
 306
 307         oldstat = curstat;
 308         name[0] = CTL_NET;
 309         name[1] = PF_INET;
 310         name[2] = IPPROTO_TCP;
 311         name[3] = TCPCTL_STATS;
 312         len = sizeof curstat;
 313
 314         if (sysctl(name, 4, &curstat, &len, 0, 0) < 0)
 315                 return;
 316 }
 317