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
  34 #if 0
  35 #ifndef lint
  36 /* From: */
  37 static char sccsid[] = "@(#)mbufs.c     8.1 (Berkeley) 6/6/93";
  38 static 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("$FreeBSD$");
  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
  68 static struct tcpstat curstat, initstat, oldstat;
  69
  70 /*-
  71 --0         1         2         3         4         5         6         7
  72 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  73 00             TCP Connections                       TCP Packets
  74 01999999999999 connections initiated    999999999999 total packets sent
  75 02999999999999 connections accepted     999999999999 - data
  76 03999999999999 connections established  999999999999 - data (retransmit by dupack)
  77 04999999999999 connections dropped      999999999999 - data (retransmit by sack)
  78 05999999999999 - in embryonic state     999999999999 - ack-only
  79 06999999999999 - on retransmit timeout  999999999999 - window probes
  80 07999999999999 - by keepalive           999999999999 - window updates
  81 08999999999999 - from listen queue      999999999999 - urgent data only
  82 09                                      999999999999 - control
  83 10                                      999999999999 - resends by PMTU discovery
  84 11             TCP Timers               999999999999 total packets received
  85 12999999999999 potential rtt updates    999999999999 - in sequence
  86 13999999999999 - successful             999999999999 - completely duplicate
  87 14999999999999 delayed acks sent        999999999999 - with some duplicate data
  88 15999999999999 retransmit timeouts      999999999999 - out-of-order
  89 16999999999999 persist timeouts         999999999999 - duplicate acks
  90 17999999999999 keepalive probes         999999999999 - acks
  91 18999999999999 - timeouts               999999999999 - window probes
  92 19                                      999999999999 - window updates
  93 20                                      999999999999 - bad checksum
  94 --0123456789012345678901234567890123456789012345678901234567890123456789012345
  95 --0         1         2         3         4         5         6         7
  96 */
  97
  98 WINDOW *
  99 opentcp(void)
 100 {
 101         return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
 102 }
 103
 104 void
 105 closetcp(w)
 106         WINDOW *w;
 107 {
 108         if (w == NULL)
 109                 return;
 110         wclear(w);
 111         wrefresh(w);
 112         delwin(w);
 113 }
 114
 115 void
 116 labeltcp(void)
 117 {
 118         wmove(wnd, 0, 0); wclrtoeol(wnd);
 119 #define L(row, str) mvwprintw(wnd, row, 13, str)
 120 #define R(row, str) mvwprintw(wnd, row, 51, str);
 121         L(0, "TCP Connections");                R(0, "TCP Packets");
 122         L(1, "connections initiated");          R(1, "total packets sent");
 123         L(2, "connections accepted");           R(2, "- data");
 124         L(3, "connections established");        R(3, "- data (retransmit by dupack)");
 125         L(4, "connections dropped");            R(4, "- data (retransmit by sack)");
 126         L(5, "- in embryonic state");           R(5, "- ack-only");
 127         L(6, "- on retransmit timeout");        R(6, "- window probes");
 128         L(7, "- by keepalive");                 R(7, "- window updates");
 129         L(8, "- from listen queue");            R(8, "- urgent data only");
 130                                                 R(9, "- control");
 131                                                 R(10, "- resends by PMTU discovery");
 132         L(11, "TCP Timers");                    R(11, "total packets received");
 133         L(12, "potential rtt updates");         R(12, "- in sequence");
 134         L(13, "- successful");                  R(13, "- completely duplicate");
 135         L(14, "delayed acks sent");             R(14, "- with some duplicate data");
 136         L(15, "retransmit timeouts");           R(15, "- out-of-order");
 137         L(16, "persist timeouts");              R(16, "- duplicate acks");
 138         L(17, "keepalive probes");              R(17, "- acks");
 139         L(18, "- timeouts");                    R(18, "- window probes");
 140                                                 R(19, "- window updates");
 141                                                 R(20, "- bad checksum");
 142 #undef L
 143 #undef R
 144 }
 145
 146 static void
 147 domode(struct tcpstat *ret)
 148 {
 149         const struct tcpstat *sub;
 150         int divisor = 1;
 151
 152         switch(currentmode) {
 153         case display_RATE:
 154                 sub = &oldstat;
 155                 divisor = naptime;
 156                 break;
 157         case display_DELTA:
 158                 sub = &oldstat;
 159                 break;
 160         case display_SINCE:
 161                 sub = &initstat;
 162                 break;
 163         default:
 164                 *ret = curstat;
 165                 return;
 166         }
 167 #define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor
 168         DO(tcps_connattempt);
 169         DO(tcps_accepts);
 170         DO(tcps_connects);
 171         DO(tcps_drops);
 172         DO(tcps_conndrops);
 173         DO(tcps_closed);
 174         DO(tcps_segstimed);
 175         DO(tcps_rttupdated);
 176         DO(tcps_delack);
 177         DO(tcps_timeoutdrop);
 178         DO(tcps_rexmttimeo);
 179         DO(tcps_persisttimeo);
 180         DO(tcps_keeptimeo);
 181         DO(tcps_keepprobe);
 182         DO(tcps_keepdrops);
 183
 184         DO(tcps_sndtotal);
 185         DO(tcps_sndpack);
 186         DO(tcps_sndbyte);
 187         DO(tcps_sndrexmitpack);
 188         DO(tcps_sack_rexmits);
 189         DO(tcps_sndacks);
 190         DO(tcps_sndprobe);
 191         DO(tcps_sndurg);
 192         DO(tcps_sndwinup);
 193         DO(tcps_sndctrl);
 194
 195         DO(tcps_rcvtotal);
 196         DO(tcps_rcvpack);
 197         DO(tcps_rcvbyte);
 198         DO(tcps_rcvbadsum);
 199         DO(tcps_rcvbadoff);
 200         DO(tcps_rcvshort);
 201         DO(tcps_rcvduppack);
 202         DO(tcps_rcvdupbyte);
 203         DO(tcps_rcvpartduppack);
 204         DO(tcps_rcvpartdupbyte);
 205         DO(tcps_rcvoopack);
 206         DO(tcps_rcvoobyte);
 207         DO(tcps_rcvpackafterwin);
 208         DO(tcps_rcvbyteafterwin);
 209         DO(tcps_rcvafterclose);
 210         DO(tcps_rcvwinprobe);
 211         DO(tcps_rcvdupack);
 212         DO(tcps_rcvacktoomuch);
 213         DO(tcps_rcvackpack);
 214         DO(tcps_rcvackbyte);
 215         DO(tcps_rcvwinupd);
 216         DO(tcps_pawsdrop);
 217         DO(tcps_predack);
 218         DO(tcps_preddat);
 219         DO(tcps_pcbcachemiss);
 220         DO(tcps_cachedrtt);
 221         DO(tcps_cachedrttvar);
 222         DO(tcps_cachedssthresh);
 223         DO(tcps_usedrtt);
 224         DO(tcps_usedrttvar);
 225         DO(tcps_usedssthresh);
 226         DO(tcps_persistdrop);
 227         DO(tcps_badsyn);
 228         DO(tcps_mturesent);
 229         DO(tcps_listendrop);
 230 #undef DO
 231 }
 232
 233 void
 234 showtcp(void)
 235 {
 236         struct tcpstat stats;
 237
 238         memset(&stats, 0, sizeof stats);
 239         domode(&stats);
 240
 241 #define DO(stat, row, col) \
 242         mvwprintw(wnd, row, col, "%12lu", stats.stat)
 243 #define L(row, stat) DO(stat, row, 0)
 244 #define R(row, stat) DO(stat, row, 38)
 245         L(1, tcps_connattempt);         R(1, tcps_sndtotal);
 246         L(2, tcps_accepts);             R(2, tcps_sndpack);
 247         L(3, tcps_connects);            R(3, tcps_sndrexmitpack);
 248         L(4, tcps_drops);               R(4, tcps_sack_rexmits);
 249         L(5, tcps_conndrops);           R(5, tcps_sndacks);
 250         L(6, tcps_timeoutdrop);         R(6, tcps_sndprobe);
 251         L(7, tcps_keepdrops);           R(7, tcps_sndwinup);
 252         L(8, tcps_listendrop);          R(8, tcps_sndurg);
 253                                         R(9, tcps_sndctrl);
 254                                         R(10, tcps_mturesent);
 255                                         R(11, tcps_rcvtotal);
 256         L(12, tcps_segstimed);          R(12, tcps_rcvpack);
 257         L(13, tcps_rttupdated);         R(13, tcps_rcvduppack);
 258         L(14, tcps_delack);             R(14, tcps_rcvpartduppack);
 259         L(15, tcps_rexmttimeo);         R(15, tcps_rcvoopack);
 260         L(16, tcps_persisttimeo);       R(16, tcps_rcvdupack);
 261         L(17, tcps_keepprobe);          R(17, tcps_rcvackpack);
 262         L(18, tcps_keeptimeo);          R(18, tcps_rcvwinprobe);
 263                                         R(19, tcps_rcvwinupd);
 264                                         R(20, tcps_rcvbadsum);
 265 #undef DO
 266 #undef L
 267 #undef R
 268 }
 269
 270 int
 271 inittcp(void)
 272 {
 273         size_t len;
 274         int name[4];
 275
 276         name[0] = CTL_NET;
 277         name[1] = PF_INET;
 278         name[2] = IPPROTO_TCP;
 279         name[3] = TCPCTL_STATS;
 280
 281         len = 0;
 282         if (sysctl(name, 4, 0, &len, 0, 0) < 0) {
 283                 error("sysctl getting tcpstat size failed");
 284                 return 0;
 285         }
 286         if (len > sizeof curstat) {
 287                 error("tcpstat structure has grown--recompile systat!");
 288                 return 0;
 289         }
 290         if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
 291                 error("sysctl getting tcpstat failed");
 292                 return 0;
 293         }
 294         oldstat = initstat;
 295         return 1;
 296 }
 297
 298 void
 299 resettcp(void)
 300 {
 301         size_t len;
 302         int name[4];
 303
 304         name[0] = CTL_NET;
 305         name[1] = PF_INET;
 306         name[2] = IPPROTO_TCP;
 307         name[3] = TCPCTL_STATS;
 308
 309         len = sizeof initstat;
 310         if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
 311                 error("sysctl getting tcpstat failed");
 312         }
 313         oldstat = initstat;
 314 }
 315
 316 void
 317 fetchtcp(void)
 318 {
 319         int name[4];
 320         size_t len;
 321
 322         oldstat = curstat;
 323         name[0] = CTL_NET;
 324         name[1] = PF_INET;
 325         name[2] = IPPROTO_TCP;
 326         name[3] = TCPCTL_STATS;
 327         len = sizeof curstat;
 328
 329         if (sysctl(name, 4, &curstat, &len, 0, 0) < 0)
 330                 return;
 331 }
 332