1 /* $NetBSD: tcp.c,v 1.15 2008/04/10 17:16:39 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1999, 2000 Andrew Doran <ad@NetBSD.org> 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 #ifndef lint 32 __RCSID("$NetBSD: tcp.c,v 1.15 2008/04/10 17:16:39 thorpej Exp $"); 33 #endif /* not lint */ 34 35 #include <sys/param.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/ip_var.h> 42 #include <netinet/tcp.h> 43 #include <netinet/tcp_timer.h> 44 #include <netinet/tcp_var.h> 45 46 #include <string.h> 47 48 #include "systat.h" 49 #include "extern.h" 50 51 #define LHD(row, str) mvwprintw(wnd, row, 10, str) 52 #define RHD(row, str) mvwprintw(wnd, row, 45, str) 53 #define SHOW(row, col, stat) \ 54 mvwprintw(wnd, row, col, "%9llu", (unsigned long long)curstat[stat]) 55 56 enum update { 57 UPDATE_TIME, 58 UPDATE_BOOT, 59 UPDATE_RUN, 60 }; 61 62 static enum update update = UPDATE_TIME; 63 static uint64_t curstat[TCP_NSTATS]; 64 static uint64_t newstat[TCP_NSTATS]; 65 static uint64_t oldstat[TCP_NSTATS]; 66 67 static struct nlist namelist[] = { 68 { .n_name = "_tcpstat" }, 69 { .n_name = NULL } 70 }; 71 72 WINDOW * 73 opentcp(void) 74 { 75 76 return (subwin(stdscr, -1, 0, 5, 0)); 77 } 78 79 void 80 closetcp(WINDOW *w) 81 { 82 83 if (w != NULL) { 84 wclear(w); 85 wrefresh(w); 86 delwin(w); 87 } 88 } 89 90 void 91 labeltcp(void) 92 { 93 94 wmove(wnd, 0, 0); wclrtoeol(wnd); 95 96 LHD(0, "connections initiated"); 97 LHD(1, "connections accepted"); 98 LHD(2, "connections established"); 99 100 LHD(4, "connections dropped"); 101 LHD(5, " in embryonic state"); 102 LHD(6, " on retransmit timeout"); 103 LHD(7, " by keepalive"); 104 LHD(8, " by persist"); 105 106 LHD(10, "potential rtt updates"); 107 LHD(11, "successful rtt updates"); 108 LHD(12, "delayed acks sent"); 109 LHD(13, "retransmit timeouts"); 110 LHD(14, "persist timeouts"); 111 LHD(15, "keepalive probes"); 112 LHD(16, "keepalive timeouts"); 113 114 RHD(9, "total TCP packets received"); 115 RHD(10, " in sequence"); 116 RHD(11, " completely duplicate"); 117 RHD(12, " with some duplicate data"); 118 RHD(13, " out of order"); 119 RHD(14, " duplicate acks"); 120 RHD(15, " acks"); 121 RHD(16, " window probes"); 122 RHD(17, " window updates"); 123 124 RHD(0, "total TCP packets sent"); 125 RHD(1, " data"); 126 RHD(2, " data (retransmit)"); 127 RHD(3, " ack-only"); 128 RHD(4, " window probes"); 129 RHD(5, " window updates"); 130 RHD(6, " urgent data only"); 131 RHD(7, " control"); 132 } 133 134 void 135 showtcpsyn(void) 136 { 137 138 SHOW(0, 0, TCP_STAT_SC_ADDED); 139 SHOW(1, 0, TCP_STAT_SC_COMPLETED); 140 SHOW(2, 0, TCP_STAT_SC_TIMED_OUT); 141 SHOW(3, 0, TCP_STAT_SC_DUPESYN); 142 SHOW(4, 0, TCP_STAT_SC_COLLISIONS); 143 SHOW(5, 0, TCP_STAT_SC_RETRANSMITTED); 144 SHOW(6, 0, TCP_STAT_SC_ABORTED); 145 SHOW(7, 0, TCP_STAT_SC_OVERFLOWED); 146 SHOW(8, 0, TCP_STAT_SC_RESET); 147 SHOW(9, 0, TCP_STAT_SC_UNREACH); 148 SHOW(10, 0, TCP_STAT_SC_BUCKETOVERFLOW); 149 SHOW(11, 0, TCP_STAT_SC_DROPPED); 150 } 151 152 void 153 labeltcpsyn(void) 154 { 155 156 wmove(wnd, 0, 0); wclrtoeol(wnd); 157 LHD(0, "entries added"); 158 LHD(1, "connections completed"); 159 LHD(2, "entries timed out"); 160 LHD(3, "duplicate SYNs received"); 161 LHD(4, "hash collisions"); 162 LHD(5, "retransmissions"); 163 LHD(6, "entries aborted (no memory)"); 164 LHD(7, "dropped (overflow)"); 165 LHD(8, "dropped (RST)"); 166 LHD(9, "dropped (ICMP UNRCH)"); 167 LHD(10, "dropped (bucket overflow)"); 168 LHD(11, "dropped (unreachable/no memory)"); 169 } 170 171 void 172 showtcp(void) 173 { 174 175 SHOW(0, 0, TCP_STAT_CONNATTEMPT); 176 SHOW(1, 0, TCP_STAT_ACCEPTS); 177 SHOW(2, 0, TCP_STAT_CONNECTS); 178 179 SHOW(4, 0, TCP_STAT_DROPS); 180 SHOW(5, 0, TCP_STAT_CONNDROPS); 181 SHOW(6, 0, TCP_STAT_TIMEOUTDROP); 182 SHOW(7, 0, TCP_STAT_KEEPDROPS); 183 SHOW(8, 0, TCP_STAT_PERSISTDROPS); 184 185 SHOW(10, 0, TCP_STAT_SEGSTIMED); 186 SHOW(11, 0, TCP_STAT_RTTUPDATED); 187 SHOW(12, 0, TCP_STAT_DELACK); 188 SHOW(13, 0, TCP_STAT_REXMTTIMEO); 189 SHOW(14, 0, TCP_STAT_PERSISTTIMEO); 190 SHOW(15, 0, TCP_STAT_KEEPPROBE); 191 SHOW(16, 0, TCP_STAT_KEEPTIMEO); 192 193 SHOW(0, 35, TCP_STAT_SNDTOTAL); 194 SHOW(1, 35, TCP_STAT_SNDPACK); 195 SHOW(2, 35, TCP_STAT_SNDREXMITPACK); 196 197 SHOW(3, 35, TCP_STAT_SNDACKS); 198 SHOW(4, 35, TCP_STAT_SNDPROBE); 199 SHOW(5, 35, TCP_STAT_SNDWINUP); 200 SHOW(6, 35, TCP_STAT_SNDURG); 201 SHOW(7, 35, TCP_STAT_SNDCTRL); 202 203 SHOW(9, 35, TCP_STAT_RCVTOTAL); 204 SHOW(10, 35, TCP_STAT_RCVPACK); 205 SHOW(11, 35, TCP_STAT_RCVDUPPACK); 206 SHOW(12, 35, TCP_STAT_RCVPARTDUPPACK); 207 SHOW(13, 35, TCP_STAT_RCVOOPACK); 208 SHOW(14, 35, TCP_STAT_RCVDUPACK); 209 SHOW(15, 35, TCP_STAT_RCVACKPACK); 210 SHOW(16, 35, TCP_STAT_RCVWINPROBE); 211 SHOW(17, 35, TCP_STAT_RCVWINUPD); 212 } 213 214 int 215 inittcp(void) 216 { 217 218 if (! use_sysctl) { 219 if (namelist[0].n_type == 0) { 220 if (kvm_nlist(kd, namelist)) { 221 nlisterr(namelist); 222 return(0); 223 } 224 if (namelist[0].n_type == 0) { 225 error("No namelist"); 226 return(0); 227 } 228 } 229 } 230 return 1; 231 } 232 233 void 234 fetchtcp(void) 235 { 236 int i; 237 238 if (use_sysctl) { 239 size_t size = sizeof(newstat); 240 241 if (sysctlbyname("net.inet.tcp.stats", newstat, &size, 242 NULL, 0) == -1) 243 return; 244 } else { 245 KREAD((void *)namelist[0].n_value, newstat, sizeof(newstat)); 246 } 247 248 for (i = 0; i < TCP_NSTATS; i++) 249 xADJINETCTR(curstat, oldstat, newstat, i); 250 251 if (update == UPDATE_TIME) 252 memcpy(oldstat, newstat, sizeof(oldstat)); 253 } 254 255 void 256 tcp_boot(char *args) 257 { 258 259 memset(oldstat, 0, sizeof(oldstat)); 260 update = UPDATE_BOOT; 261 } 262 263 void 264 tcp_run(char *args) 265 { 266 267 if (update != UPDATE_RUN) { 268 memcpy(oldstat, newstat, sizeof(oldstat)); 269 update = UPDATE_RUN; 270 } 271 } 272 273 void 274 tcp_time(char *args) 275 { 276 277 if (update != UPDATE_TIME) { 278 memcpy(oldstat, newstat, sizeof(oldstat)); 279 update = UPDATE_TIME; 280 } 281 } 282 283 void 284 tcp_zero(char *args) 285 { 286 287 if (update == UPDATE_RUN) 288 memcpy(oldstat, newstat, sizeof(oldstat)); 289 } 290