inet.c revision 1.36
1 /* $NetBSD: inet.c,v 1.36 1999/04/29 03:58:27 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "from: @(#)inet.c 8.4 (Berkeley) 4/20/94"; 40 #else 41 __RCSID("$NetBSD: inet.c,v 1.36 1999/04/29 03:58:27 thorpej Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/queue.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/mbuf.h> 50 #include <sys/protosw.h> 51 52 #include <net/route.h> 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/in_pcb.h> 57 #include <netinet/ip_icmp.h> 58 #include <netinet/icmp_var.h> 59 #include <netinet/igmp_var.h> 60 #include <netinet/ip_var.h> 61 #include <netinet/tcp.h> 62 #include <netinet/tcpip.h> 63 #include <netinet/tcp_seq.h> 64 #define TCPSTATES 65 #include <netinet/tcp_fsm.h> 66 #define TCPTIMERS 67 #include <netinet/tcp_timer.h> 68 #include <netinet/tcp_var.h> 69 #include <netinet/tcp_debug.h> 70 #include <netinet/udp.h> 71 #include <netinet/udp_var.h> 72 73 #include <arpa/inet.h> 74 #include <netdb.h> 75 #include <stdio.h> 76 #include <string.h> 77 #include <unistd.h> 78 #include "netstat.h" 79 80 struct inpcb inpcb; 81 struct tcpcb tcpcb; 82 struct socket sockb; 83 84 char *inetname __P((struct in_addr *)); 85 void inetprint __P((struct in_addr *, u_int16_t, const char *, int)); 86 87 /* 88 * Print a summary of connections related to an Internet 89 * protocol. For TCP, also give state of connection. 90 * Listening processes (aflag) are suppressed unless the 91 * -a (all) flag is specified. 92 */ 93 static int width; 94 95 void 96 protopr(off, name) 97 u_long off; 98 char *name; 99 { 100 struct inpcbtable table; 101 struct inpcb *head, *next, *prev; 102 struct inpcb inpcb; 103 int istcp, compact; 104 static int first = 1; 105 static char *shorttcpstates[] = { 106 "CLOSED", "LISTEN", "SYNSEN", "SYSRCV", 107 "ESTABL", "CLWAIT", "FWAIT1", "CLOSNG", 108 "LASTAK", "FWAIT2", "TMWAIT", 109 }; 110 111 if (off == 0) 112 return; 113 istcp = strcmp(name, "tcp") == 0; 114 kread(off, (char *)&table, sizeof table); 115 prev = head = 116 (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue.cqh_first; 117 next = table.inpt_queue.cqh_first; 118 119 compact = 0; 120 if (Aflag) { 121 if (!nflag) 122 width = 18; 123 else { 124 width = 21; 125 compact = 1; 126 } 127 } else 128 width = 22; 129 while (next != head) { 130 kread((u_long)next, (char *)&inpcb, sizeof inpcb); 131 if (inpcb.inp_queue.cqe_prev != prev) { 132 printf("???\n"); 133 break; 134 } 135 prev = next; 136 next = inpcb.inp_queue.cqe_next; 137 138 if (!aflag && 139 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 140 continue; 141 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 142 if (istcp) { 143 kread((u_long)inpcb.inp_ppcb, 144 (char *)&tcpcb, sizeof (tcpcb)); 145 } 146 if (first) { 147 printf("Active Internet connections"); 148 if (aflag) 149 printf(" (including servers)"); 150 putchar('\n'); 151 if (Aflag) 152 printf("%-8.8s ", "PCB"); 153 printf("%-5.5s %-6.6s %-6.6s %s%-*.*s %-*.*s %s\n", 154 "Proto", "Recv-Q", "Send-Q", 155 compact ? "" : " ", 156 width, width, "Local Address", 157 width, width, "Foreign Address", "State"); 158 first = 0; 159 } 160 if (Aflag) { 161 if (istcp) 162 printf("%8lx ", (u_long) inpcb.inp_ppcb); 163 else 164 printf("%8lx ", (u_long) prev); 165 } 166 printf("%-5.5s %6ld %6ld%s", name, sockb.so_rcv.sb_cc, 167 sockb.so_snd.sb_cc, compact ? "" : " "); 168 if (nflag) { 169 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name, 1); 170 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name, 1); 171 } else if (inpcb.inp_flags & INP_ANONPORT) { 172 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name, 1); 173 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name, 0); 174 } else { 175 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name, 0); 176 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name, 177 inpcb.inp_lport != inpcb.inp_fport); 178 } 179 if (istcp) { 180 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 181 printf(" %d", tcpcb.t_state); 182 else 183 printf(" %s", compact ? 184 shorttcpstates[tcpcb.t_state] : 185 tcpstates[tcpcb.t_state]); 186 } 187 putchar('\n'); 188 } 189 } 190 191 /* 192 * Dump TCP statistics structure. 193 */ 194 void 195 tcp_stats(off, name) 196 u_long off; 197 char *name; 198 { 199 struct tcpstat tcpstat; 200 201 if (off == 0) 202 return; 203 printf ("%s:\n", name); 204 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 205 206 #define ps(f, m) if (tcpstat.f || sflag <= 1) \ 207 printf(m, tcpstat.f) 208 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 209 printf(m, tcpstat.f, plural(tcpstat.f)) 210 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 211 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 212 #define p2s(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 213 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2) 214 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 215 printf(m, tcpstat.f, plurales(tcpstat.f)) 216 217 p(tcps_sndtotal, "\t%lu packet%s sent\n"); 218 p2(tcps_sndpack,tcps_sndbyte, 219 "\t\t%lu data packet%s (%lu byte%s)\n"); 220 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 221 "\t\t%lu data packet%s (%lu byte%s) retransmitted\n"); 222 p2s(tcps_sndacks, tcps_delack, 223 "\t\t%lu ack-only packet%s (%lu delayed)\n"); 224 p(tcps_sndurg, "\t\t%lu URG only packet%s\n"); 225 p(tcps_sndprobe, "\t\t%lu window probe packet%s\n"); 226 p(tcps_sndwinup, "\t\t%lu window update packet%s\n"); 227 p(tcps_sndctrl, "\t\t%lu control packet%s\n"); 228 p(tcps_rcvtotal, "\t%lu packet%s received\n"); 229 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%lu ack%s (for %lu byte%s)\n"); 230 p(tcps_rcvdupack, "\t\t%lu duplicate ack%s\n"); 231 p(tcps_rcvacktoomuch, "\t\t%lu ack%s for unsent data\n"); 232 p2(tcps_rcvpack, tcps_rcvbyte, 233 "\t\t%lu packet%s (%lu byte%s) received in-sequence\n"); 234 p2(tcps_rcvduppack, tcps_rcvdupbyte, 235 "\t\t%lu completely duplicate packet%s (%lu byte%s)\n"); 236 p(tcps_pawsdrop, "\t\t%lu old duplicate packet%s\n"); 237 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 238 "\t\t%lu packet%s with some dup. data (%lu byte%s duped)\n"); 239 p2(tcps_rcvoopack, tcps_rcvoobyte, 240 "\t\t%lu out-of-order packet%s (%lu byte%s)\n"); 241 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 242 "\t\t%lu packet%s (%lu byte%s) of data after window\n"); 243 p(tcps_rcvwinprobe, "\t\t%lu window probe%s\n"); 244 p(tcps_rcvwinupd, "\t\t%lu window update packet%s\n"); 245 p(tcps_rcvafterclose, "\t\t%lu packet%s received after close\n"); 246 p(tcps_rcvbadsum, "\t\t%lu discarded for bad checksum%s\n"); 247 p(tcps_rcvbadoff, "\t\t%lu discarded for bad header offset field%s\n"); 248 ps(tcps_rcvshort, "\t\t%lu discarded because packet too short\n"); 249 p(tcps_connattempt, "\t%lu connection request%s\n"); 250 p(tcps_accepts, "\t%lu connection accept%s\n"); 251 p(tcps_connects, "\t%lu connection%s established (including accepts)\n"); 252 p2(tcps_closed, tcps_drops, 253 "\t%lu connection%s closed (including %lu drop%s)\n"); 254 p(tcps_conndrops, "\t%lu embryonic connection%s dropped\n"); 255 p2(tcps_rttupdated, tcps_segstimed, 256 "\t%lu segment%s updated rtt (of %lu attempt%s)\n"); 257 p(tcps_rexmttimeo, "\t%lu retransmit timeout%s\n"); 258 p(tcps_timeoutdrop, "\t\t%lu connection%s dropped by rexmit timeout\n"); 259 p2(tcps_persisttimeo, tcps_persistdrops, 260 "\t%lu persist timeout%s (resulting in %lu dropped connection%s)\n"); 261 p(tcps_keeptimeo, "\t%lu keepalive timeout%s\n"); 262 p(tcps_keepprobe, "\t\t%lu keepalive probe%s sent\n"); 263 p(tcps_keepdrops, "\t\t%lu connection%s dropped by keepalive\n"); 264 p(tcps_predack, "\t%lu correct ACK header prediction%s\n"); 265 p(tcps_preddat, "\t%lu correct data packet header prediction%s\n"); 266 p3(tcps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 267 ps(tcps_noport, "\t%lu dropped due to no socket\n"); 268 p(tcps_connsdrained, "\t%lu connection%s drained due to memory shortage\n"); 269 270 p(tcps_badsyn, "\t%lu bad connection attempt%s\n"); 271 ps(tcps_sc_added, "\t%lu SYN cache entries added\n"); 272 p(tcps_sc_collisions, "\t\t%lu hash collision%s\n"); 273 ps(tcps_sc_completed, "\t\t%lu completed\n"); 274 ps(tcps_sc_aborted, "\t\t%lu aborted (no space to build PCB)\n"); 275 ps(tcps_sc_timed_out, "\t\t%lu timed out\n"); 276 ps(tcps_sc_overflowed, "\t\t%lu dropped due to overflow\n"); 277 ps(tcps_sc_bucketoverflow, "\t\t%lu dropped due to bucket overflow\n"); 278 ps(tcps_sc_reset, "\t\t%lu dropped due to RST\n"); 279 ps(tcps_sc_unreach, "\t\t%lu dropped due to ICMP unreachable\n"); 280 p(tcps_sc_retransmitted, "\t%lu SYN,ACK%s retransmitted\n"); 281 p(tcps_sc_dupesyn, "\t%lu duplicate SYN%s received for entries already in the cache\n"); 282 p(tcps_sc_dropped, "\t%lu SYN%s dropped (no route or no space)\n"); 283 284 #undef p 285 #undef ps 286 #undef p2 287 #undef p2s 288 #undef p3 289 } 290 291 /* 292 * Dump UDP statistics structure. 293 */ 294 void 295 udp_stats(off, name) 296 u_long off; 297 char *name; 298 { 299 struct udpstat udpstat; 300 u_long delivered; 301 302 if (off == 0) 303 return; 304 printf("%s:\n", name); 305 kread(off, (char *)&udpstat, sizeof (udpstat)); 306 307 #define ps(f, m) if (udpstat.f || sflag <= 1) \ 308 printf(m, udpstat.f) 309 #define p(f, m) if (udpstat.f || sflag <= 1) \ 310 printf(m, udpstat.f, plural(udpstat.f)) 311 #define p3(f, m) if (udpstat.f || sflag <= 1) \ 312 printf(m, udpstat.f, plurales(udpstat.f)) 313 314 p(udps_ipackets, "\t%lu datagram%s received\n"); 315 ps(udps_hdrops, "\t%lu with incomplete header\n"); 316 ps(udps_badlen, "\t%lu with bad data length field\n"); 317 ps(udps_badsum, "\t%lu with bad checksum\n"); 318 ps(udps_noport, "\t%lu dropped due to no socket\n"); 319 p(udps_noportbcast, "\t%lu broadcast/multicast datagram%s dropped due to no socket\n"); 320 ps(udps_fullsock, "\t%lu dropped due to full socket buffers\n"); 321 delivered = udpstat.udps_ipackets - 322 udpstat.udps_hdrops - 323 udpstat.udps_badlen - 324 udpstat.udps_badsum - 325 udpstat.udps_noport - 326 udpstat.udps_noportbcast - 327 udpstat.udps_fullsock; 328 if (delivered || sflag <= 1) 329 printf("\t%lu delivered\n", delivered); 330 p3(udps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 331 p(udps_opackets, "\t%lu datagram%s output\n"); 332 333 #undef ps 334 #undef p 335 #undef p3 336 } 337 338 /* 339 * Dump IP statistics structure. 340 */ 341 void 342 ip_stats(off, name) 343 u_long off; 344 char *name; 345 { 346 struct ipstat ipstat; 347 348 if (off == 0) 349 return; 350 kread(off, (char *)&ipstat, sizeof (ipstat)); 351 printf("%s:\n", name); 352 353 #define ps(f, m) if (ipstat.f || sflag <= 1) \ 354 printf(m, ipstat.f) 355 #define p(f, m) if (ipstat.f || sflag <= 1) \ 356 printf(m, ipstat.f, plural(ipstat.f)) 357 358 p(ips_total, "\t%lu total packet%s received\n"); 359 p(ips_badsum, "\t%lu bad header checksum%s\n"); 360 ps(ips_toosmall, "\t%lu with size smaller than minimum\n"); 361 ps(ips_tooshort, "\t%lu with data size < data length\n"); 362 ps(ips_toolong, "\t%lu with length > max ip packet size\n"); 363 ps(ips_badhlen, "\t%lu with header length < data size\n"); 364 ps(ips_badlen, "\t%lu with data length < header length\n"); 365 ps(ips_badoptions, "\t%lu with bad options\n"); 366 ps(ips_badvers, "\t%lu with incorrect version number\n"); 367 p(ips_fragments, "\t%lu fragment%s received"); 368 p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n"); 369 p(ips_badfrags, "\t%lu malformed fragment%s dropped\n"); 370 p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n"); 371 p(ips_reassembled, "\t%lu packet%s reassembled ok\n"); 372 p(ips_delivered, "\t%lu packet%s for this host\n"); 373 p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n"); 374 p(ips_forward, "\t%lu packet%s forwarded"); 375 p(ips_fastforward, " (%lu packet%s fast forwarded)"); 376 if (ipstat.ips_forward || sflag <= 1) 377 putchar('\n'); 378 p(ips_cantforward, "\t%lu packet%s not forwardable\n"); 379 p(ips_redirectsent, "\t%lu redirect%s sent\n"); 380 p(ips_localout, "\t%lu packet%s sent from this host\n"); 381 p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n"); 382 p(ips_odropped, "\t%lu output packet%s dropped due to no bufs, etc.\n"); 383 p(ips_noroute, "\t%lu output packet%s discarded due to no route\n"); 384 p(ips_fragmented, "\t%lu output datagram%s fragmented\n"); 385 p(ips_ofragments, "\t%lu fragment%s created\n"); 386 p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n"); 387 #undef ps 388 #undef p 389 } 390 391 static char *icmpnames[] = { 392 "echo reply", 393 "#1", 394 "#2", 395 "destination unreachable", 396 "source quench", 397 "routing redirect", 398 "#6", 399 "#7", 400 "echo", 401 "#9", 402 "#10", 403 "time exceeded", 404 "parameter problem", 405 "time stamp", 406 "time stamp reply", 407 "information request", 408 "information request reply", 409 "address mask request", 410 "address mask reply", 411 }; 412 413 /* 414 * Dump ICMP statistics. 415 */ 416 void 417 icmp_stats(off, name) 418 u_long off; 419 char *name; 420 { 421 struct icmpstat icmpstat; 422 int i, first; 423 424 if (off == 0) 425 return; 426 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 427 printf("%s:\n", name); 428 429 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 430 printf(m, icmpstat.f, plural(icmpstat.f)) 431 432 p(icps_error, "\t%lu call%s to icmp_error\n"); 433 p(icps_oldicmp, 434 "\t%lu error%s not generated because old message was icmp\n"); 435 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 436 if (icmpstat.icps_outhist[i] != 0) { 437 if (first) { 438 printf("\tOutput histogram:\n"); 439 first = 0; 440 } 441 printf("\t\t%s: %lu\n", icmpnames[i], 442 icmpstat.icps_outhist[i]); 443 } 444 p(icps_badcode, "\t%lu message%s with bad code fields\n"); 445 p(icps_tooshort, "\t%lu message%s < minimum length\n"); 446 p(icps_checksum, "\t%lu bad checksum%s\n"); 447 p(icps_badlen, "\t%lu message%s with bad length\n"); 448 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 449 if (icmpstat.icps_inhist[i] != 0) { 450 if (first) { 451 printf("\tInput histogram:\n"); 452 first = 0; 453 } 454 printf("\t\t%s: %lu\n", icmpnames[i], 455 icmpstat.icps_inhist[i]); 456 } 457 p(icps_reflect, "\t%lu message response%s generated\n"); 458 #undef p 459 } 460 461 /* 462 * Dump IGMP statistics structure. 463 */ 464 void 465 igmp_stats(off, name) 466 u_long off; 467 char *name; 468 { 469 struct igmpstat igmpstat; 470 471 if (off == 0) 472 return; 473 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 474 printf("%s:\n", name); 475 476 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 477 printf(m, igmpstat.f, plural(igmpstat.f)) 478 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 479 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 480 p(igps_rcv_total, "\t%lu message%s received\n"); 481 p(igps_rcv_tooshort, "\t%lu message%s received with too few bytes\n"); 482 p(igps_rcv_badsum, "\t%lu message%s received with bad checksum\n"); 483 py(igps_rcv_queries, "\t%lu membership quer%s received\n"); 484 py(igps_rcv_badqueries, "\t%lu membership quer%s received with invalid field(s)\n"); 485 p(igps_rcv_reports, "\t%lu membership report%s received\n"); 486 p(igps_rcv_badreports, "\t%lu membership report%s received with invalid field(s)\n"); 487 p(igps_rcv_ourreports, "\t%lu membership report%s received for groups to which we belong\n"); 488 p(igps_snd_reports, "\t%lu membership report%s sent\n"); 489 #undef p 490 #undef py 491 } 492 493 /* 494 * Pretty print an Internet address (net address + port). 495 * If the nflag was specified, use numbers instead of names. 496 */ 497 void 498 inetprint(in, port, proto, numeric) 499 struct in_addr *in; 500 u_int16_t port; 501 const char *proto; 502 int numeric; 503 { 504 struct servent *sp = 0; 505 char line[80], *cp; 506 size_t space; 507 508 (void)snprintf(line, sizeof line, "%.*s.", 509 (Aflag && !nflag) ? 12 : 16, inetname(in)); 510 cp = strchr(line, '\0'); 511 if (!numeric && port) 512 sp = getservbyport((int)port, proto); 513 space = sizeof line - (cp-line); 514 if (sp || port == 0) 515 (void)snprintf(cp, space, "%.8s", sp ? sp->s_name : "*"); 516 else 517 (void)snprintf(cp, space, "%u", ntohs(port)); 518 (void)printf(" %-*.*s", width, width, line); 519 } 520 521 /* 522 * Construct an Internet address representation. 523 * If the nflag has been supplied, give 524 * numeric value, otherwise try for symbolic name. 525 */ 526 char * 527 inetname(inp) 528 struct in_addr *inp; 529 { 530 char *cp; 531 static char line[50]; 532 struct hostent *hp; 533 struct netent *np; 534 static char domain[MAXHOSTNAMELEN + 1]; 535 static int first = 1; 536 537 if (first && !nflag) { 538 first = 0; 539 if (gethostname(domain, sizeof domain) == 0) { 540 domain[sizeof(domain) - 1] = '\0'; 541 if ((cp = strchr(domain, '.'))) 542 (void) strcpy(domain, cp + 1); 543 else 544 domain[0] = 0; 545 } else 546 domain[0] = 0; 547 } 548 cp = 0; 549 if (!nflag && inp->s_addr != INADDR_ANY) { 550 int net = inet_netof(*inp); 551 int lna = inet_lnaof(*inp); 552 553 if (lna == INADDR_ANY) { 554 np = getnetbyaddr(net, AF_INET); 555 if (np) 556 cp = np->n_name; 557 } 558 if (cp == 0) { 559 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 560 if (hp) { 561 if ((cp = strchr(hp->h_name, '.')) && 562 !strcmp(cp + 1, domain)) 563 *cp = 0; 564 cp = hp->h_name; 565 } 566 } 567 } 568 if (inp->s_addr == INADDR_ANY) 569 strncpy(line, "*", sizeof line); 570 else if (cp) 571 strncpy(line, cp, sizeof line); 572 else { 573 inp->s_addr = ntohl(inp->s_addr); 574 #define C(x) ((x) & 0xff) 575 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 576 C(inp->s_addr >> 24), C(inp->s_addr >> 16), 577 C(inp->s_addr >> 8), C(inp->s_addr)); 578 #undef C 579 } 580 line[sizeof(line) - 1] = '\0'; 581 return (line); 582 } 583 584 /* 585 * Dump the contents of a TCP PCB. 586 */ 587 void 588 tcp_dump(pcbaddr) 589 u_long pcbaddr; 590 { 591 struct tcpcb tcpcb; 592 int i; 593 594 kread(pcbaddr, (char *)&tcpcb, sizeof(tcpcb)); 595 596 printf("TCP Protocol Control Block at 0x%08lx:\n\n", pcbaddr); 597 598 printf("Timers:\n"); 599 for (i = 0; i < TCPT_NTIMERS; i++) 600 printf("\t%s: %u", tcptimers[i], tcpcb.t_timer[i]); 601 printf("\n\n"); 602 603 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 604 printf("State: %d", tcpcb.t_state); 605 else 606 printf("State: %s", tcpstates[tcpcb.t_state]); 607 printf(", flags 0x%x, inpcb 0x%lx\n\n", tcpcb.t_flags, 608 (u_long)tcpcb.t_inpcb); 609 610 printf("rxtshift %d, rxtcur %d, dupacks %d\n", tcpcb.t_rxtshift, 611 tcpcb.t_rxtcur, tcpcb.t_dupacks); 612 printf("peermss %u, ourmss %u, segsz %u\n\n", tcpcb.t_peermss, 613 tcpcb.t_ourmss, tcpcb.t_segsz); 614 615 printf("snd_una %u, snd_nxt %u, snd_up %u\n", 616 tcpcb.snd_una, tcpcb.snd_nxt, tcpcb.snd_up); 617 printf("snd_wl1 %u, snd_wl2 %u, iss %u, snd_wnd %lu\n\n", 618 tcpcb.snd_wl1, tcpcb.snd_wl2, tcpcb.iss, tcpcb.snd_wnd); 619 620 printf("rcv_wnd %lu, rcv_nxt %u, rcv_up %u, irs %u\n\n", 621 tcpcb.rcv_wnd, tcpcb.rcv_nxt, tcpcb.rcv_up, tcpcb.irs); 622 623 printf("rcv_adv %u, snd_max %u, snd_cwnd %lu, snd_ssthresh %lu\n", 624 tcpcb.rcv_adv, tcpcb.snd_max, tcpcb.snd_cwnd, tcpcb.snd_ssthresh); 625 626 printf("idle %d, rtt %d, rtseq %u, srtt %d, rttvar %d, rttmin %d, " 627 "max_sndwnd %lu\n\n", tcpcb.t_idle, tcpcb.t_rtt, tcpcb.t_rtseq, 628 tcpcb.t_srtt, tcpcb.t_rttvar, tcpcb.t_rttmin, tcpcb.max_sndwnd); 629 630 printf("oobflags %d, iobc %d, softerror %d\n\n", tcpcb.t_oobflags, 631 tcpcb.t_iobc, tcpcb.t_softerror); 632 633 printf("snd_scale %d, rcv_scale %d, req_r_scale %d, req_s_scale %d\n", 634 tcpcb.snd_scale, tcpcb.rcv_scale, tcpcb.request_r_scale, 635 tcpcb.requested_s_scale); 636 printf("ts_recent %u, ts_regent_age %d, last_ack_sent %u\n", 637 tcpcb.ts_recent, tcpcb.ts_recent_age, tcpcb.last_ack_sent); 638 } 639
Indexes created Mon Sep 22 13:09:51 GMT 2025