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 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <sys/socket.h> 35 #include <sys/queue.h> 36 #include <sys/sysctl.h> 37 38 #include <netinet/in.h> 39 #include <netinet/in_systm.h> 40 #include <netinet/ip.h> 41 #include <netinet/tcp.h> 42 #include <netinet/tcp_seq.h> 43 #include <netinet/tcp_fsm.h> 44 #include <netinet/tcp_var.h> 45 46 #include <inttypes.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <paths.h> 50 51 #include "systat.h" 52 #include "extern.h" 53 #include "mode.h" 54 55 static struct tcpstat curstat, initstat, oldstat; 56 57 /*- 58 --0 1 2 3 4 5 6 7 59 --0123456789012345678901234567890123456789012345678901234567890123456789012345 60 00 TCP Connections TCP Packets 61 01999999999999 connections initiated 999999999999 total packets sent 62 02999999999999 connections accepted 999999999999 - data 63 03999999999999 connections established 999999999999 - data (retransmit by dupack) 64 04999999999999 connections dropped 999999999999 - data (retransmit by sack) 65 05999999999999 - in embryonic state 999999999999 - ack-only 66 06999999999999 - on retransmit timeout 999999999999 - window probes 67 07999999999999 - by keepalive 999999999999 - window updates 68 08999999999999 - from listen queue 999999999999 - urgent data only 69 09 999999999999 - control 70 10 999999999999 - resends by PMTU discovery 71 11 TCP Timers 999999999999 total packets received 72 12999999999999 potential rtt updates 999999999999 - in sequence 73 13999999999999 - successful 999999999999 - completely duplicate 74 14999999999999 delayed acks sent 999999999999 - with some duplicate data 75 15999999999999 retransmit timeouts 999999999999 - out-of-order 76 16999999999999 persist timeouts 999999999999 - duplicate acks 77 17999999999999 keepalive probes 999999999999 - acks 78 18999999999999 - timeouts 999999999999 - window probes 79 19 999999999999 - window updates 80 20 999999999999 - bad checksum 81 --0123456789012345678901234567890123456789012345678901234567890123456789012345 82 --0 1 2 3 4 5 6 7 83 */ 84 85 WINDOW * 86 opentcp(void) 87 { 88 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0)); 89 } 90 91 void 92 closetcp(WINDOW *w) 93 { 94 if (w == NULL) 95 return; 96 wclear(w); 97 wrefresh(w); 98 delwin(w); 99 } 100 101 void 102 labeltcp(void) 103 { 104 wmove(wnd, 0, 0); wclrtoeol(wnd); 105 #define L(row, str) mvwprintw(wnd, row, 13, str) 106 #define R(row, str) mvwprintw(wnd, row, 51, str); 107 L(0, "TCP Connections"); R(0, "TCP Packets"); 108 L(1, "connections initiated"); R(1, "total packets sent"); 109 L(2, "connections accepted"); R(2, "- data"); 110 L(3, "connections established"); R(3, "- data (retransmit by dupack)"); 111 L(4, "connections dropped"); R(4, "- data (retransmit by sack)"); 112 L(5, "- in embryonic state"); R(5, "- ack-only"); 113 L(6, "- on retransmit timeout"); R(6, "- window probes"); 114 L(7, "- by keepalive"); R(7, "- window updates"); 115 L(8, "- exceeded progress time"); R(8, "- urgent data only"); 116 L(9, "- from listen queue"); R(9, "- control"); 117 R(10, "- resends by PMTU discovery"); 118 L(11, "TCP Timers"); R(11, "total packets received"); 119 L(12, "potential rtt updates"); R(12, "- in sequence"); 120 L(13, "- successful"); R(13, "- completely duplicate"); 121 L(14, "delayed acks sent"); R(14, "- with some duplicate data"); 122 L(15, "retransmit timeouts"); R(15, "- out-of-order"); 123 L(16, "persist timeouts"); R(16, "- duplicate acks"); 124 L(17, "keepalive probes"); R(17, "- acks"); 125 L(18, "- timeouts"); R(18, "- window probes"); 126 R(19, "- window updates"); 127 R(20, "- bad checksum"); 128 #undef L 129 #undef R 130 } 131 132 static void 133 domode(struct tcpstat *ret) 134 { 135 const struct tcpstat *sub; 136 int divisor = 1; 137 138 switch(currentmode) { 139 case display_RATE: 140 sub = &oldstat; 141 divisor = (delay > 1000000) ? delay / 1000000 : 1; 142 break; 143 case display_DELTA: 144 sub = &oldstat; 145 break; 146 case display_SINCE: 147 sub = &initstat; 148 break; 149 default: 150 *ret = curstat; 151 return; 152 } 153 #define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor 154 DO(tcps_connattempt); 155 DO(tcps_accepts); 156 DO(tcps_connects); 157 DO(tcps_drops); 158 DO(tcps_conndrops); 159 DO(tcps_closed); 160 DO(tcps_segstimed); 161 DO(tcps_rttupdated); 162 DO(tcps_delack); 163 DO(tcps_timeoutdrop); 164 DO(tcps_rexmttimeo); 165 DO(tcps_persisttimeo); 166 DO(tcps_keeptimeo); 167 DO(tcps_keepprobe); 168 DO(tcps_keepdrops); 169 DO(tcps_progdrops); 170 171 DO(tcps_sndtotal); 172 DO(tcps_sndpack); 173 DO(tcps_sndbyte); 174 DO(tcps_sndrexmitpack); 175 DO(tcps_sack_rexmits); 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, "%12"PRIu64, stats.stat) 230 #define L(row, stat) DO(stat, row, 0) 231 #define R(row, stat) DO(stat, row, 38) 232 L(1, tcps_connattempt); R(1, tcps_sndtotal); 233 L(2, tcps_accepts); R(2, tcps_sndpack); 234 L(3, tcps_connects); R(3, tcps_sndrexmitpack); 235 L(4, tcps_drops); R(4, tcps_sack_rexmits); 236 L(5, tcps_conndrops); R(5, tcps_sndacks); 237 L(6, tcps_timeoutdrop); R(6, tcps_sndprobe); 238 L(7, tcps_keepdrops); R(7, tcps_sndwinup); 239 L(8, tcps_progdrops); R(8, tcps_sndurg); 240 L(9, tcps_listendrop); R(9, tcps_sndctrl); 241 R(10, tcps_mturesent); 242 R(11, tcps_rcvtotal); 243 L(12, tcps_segstimed); R(12, tcps_rcvpack); 244 L(13, tcps_rttupdated); R(13, tcps_rcvduppack); 245 L(14, tcps_delack); R(14, tcps_rcvpartduppack); 246 L(15, tcps_rexmttimeo); R(15, tcps_rcvoopack); 247 L(16, tcps_persisttimeo); R(16, tcps_rcvdupack); 248 L(17, tcps_keepprobe); R(17, tcps_rcvackpack); 249 L(18, tcps_keeptimeo); R(18, tcps_rcvwinprobe); 250 R(19, tcps_rcvwinupd); 251 R(20, tcps_rcvbadsum); 252 #undef DO 253 #undef L 254 #undef R 255 } 256 257 int 258 inittcp(void) 259 { 260 size_t len; 261 int name[4]; 262 263 name[0] = CTL_NET; 264 name[1] = PF_INET; 265 name[2] = IPPROTO_TCP; 266 name[3] = TCPCTL_STATS; 267 268 len = 0; 269 if (sysctl(name, 4, 0, &len, 0, 0) < 0) { 270 error("sysctl getting tcpstat size failed"); 271 return 0; 272 } 273 if (len > sizeof curstat) { 274 error("tcpstat structure has grown--recompile systat!"); 275 return 0; 276 } 277 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 278 error("sysctl getting tcpstat failed"); 279 return 0; 280 } 281 oldstat = initstat; 282 return 1; 283 } 284 285 void 286 resettcp(void) 287 { 288 size_t len; 289 int name[4]; 290 291 name[0] = CTL_NET; 292 name[1] = PF_INET; 293 name[2] = IPPROTO_TCP; 294 name[3] = TCPCTL_STATS; 295 296 len = sizeof initstat; 297 if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) { 298 error("sysctl getting tcpstat failed"); 299 } 300 oldstat = initstat; 301 } 302 303 void 304 fetchtcp(void) 305 { 306 int name[4]; 307 size_t len; 308 309 oldstat = curstat; 310 name[0] = CTL_NET; 311 name[1] = PF_INET; 312 name[2] = IPPROTO_TCP; 313 name[3] = TCPCTL_STATS; 314 len = sizeof curstat; 315 316 if (sysctl(name, 4, &curstat, &len, 0, 0) < 0) 317 return; 318 } 319