inet.c revision 1.34
1 /* $NetBSD: inet.c,v 1.34 1998/08/25 20:59:39 ross 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 1.34 1998/08/25 20:59:39 ross 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 void 94 protopr(off, name) 95 u_long off; 96 char *name; 97 { 98 struct inpcbtable table; 99 struct inpcb *head, *next, *prev; 100 struct inpcb inpcb; 101 int istcp; 102 static int first = 1; 103 104 if (off == 0) 105 return; 106 istcp = strcmp(name, "tcp") == 0; 107 kread(off, (char *)&table, sizeof table); 108 prev = head = 109 (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue.cqh_first; 110 next = table.inpt_queue.cqh_first; 111 112 while (next != head) { 113 kread((u_long)next, (char *)&inpcb, sizeof inpcb); 114 if (inpcb.inp_queue.cqe_prev != prev) { 115 printf("???\n"); 116 break; 117 } 118 prev = next; 119 next = inpcb.inp_queue.cqe_next; 120 121 if (!aflag && 122 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 123 continue; 124 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 125 if (istcp) { 126 kread((u_long)inpcb.inp_ppcb, 127 (char *)&tcpcb, sizeof (tcpcb)); 128 } 129 if (first) { 130 printf("Active Internet connections"); 131 if (aflag) 132 printf(" (including servers)"); 133 putchar('\n'); 134 if (Aflag) 135 printf("%-8.8s ", "PCB"); 136 printf(Aflag ? 137 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 138 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 139 "Proto", "Recv-Q", "Send-Q", 140 "Local Address", "Foreign Address", "(state)"); 141 first = 0; 142 } 143 if (Aflag) { 144 if (istcp) 145 printf("%8lx ", (u_long) inpcb.inp_ppcb); 146 else 147 printf("%8lx ", (u_long) prev); 148 } 149 printf("%-5.5s %6ld %6ld ", name, sockb.so_rcv.sb_cc, 150 sockb.so_snd.sb_cc); 151 if (nflag) { 152 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name, 1); 153 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name, 1); 154 } else if (inpcb.inp_flags & INP_ANONPORT) { 155 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name, 1); 156 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name, 0); 157 } else { 158 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name, 0); 159 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name, 160 inpcb.inp_lport != inpcb.inp_fport); 161 } 162 if (istcp) { 163 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 164 printf(" %d", tcpcb.t_state); 165 else 166 printf(" %s", tcpstates[tcpcb.t_state]); 167 } 168 putchar('\n'); 169 } 170 } 171 172 /* 173 * Dump TCP statistics structure. 174 */ 175 void 176 tcp_stats(off, name) 177 u_long off; 178 char *name; 179 { 180 struct tcpstat tcpstat; 181 182 if (off == 0) 183 return; 184 printf ("%s:\n", name); 185 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 186 187 #define ps(f, m) if (tcpstat.f || sflag <= 1) \ 188 printf(m, tcpstat.f) 189 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 190 printf(m, tcpstat.f, plural(tcpstat.f)) 191 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 192 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 193 #define p2s(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 194 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2) 195 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 196 printf(m, tcpstat.f, plurales(tcpstat.f)) 197 198 p(tcps_sndtotal, "\t%lu packet%s sent\n"); 199 p2(tcps_sndpack,tcps_sndbyte, 200 "\t\t%lu data packet%s (%lu byte%s)\n"); 201 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 202 "\t\t%lu data packet%s (%lu byte%s) retransmitted\n"); 203 p2s(tcps_sndacks, tcps_delack, 204 "\t\t%lu ack-only packet%s (%lu delayed)\n"); 205 p(tcps_sndurg, "\t\t%lu URG only packet%s\n"); 206 p(tcps_sndprobe, "\t\t%lu window probe packet%s\n"); 207 p(tcps_sndwinup, "\t\t%lu window update packet%s\n"); 208 p(tcps_sndctrl, "\t\t%lu control packet%s\n"); 209 p(tcps_rcvtotal, "\t%lu packet%s received\n"); 210 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%lu ack%s (for %lu byte%s)\n"); 211 p(tcps_rcvdupack, "\t\t%lu duplicate ack%s\n"); 212 p(tcps_rcvacktoomuch, "\t\t%lu ack%s for unsent data\n"); 213 p2(tcps_rcvpack, tcps_rcvbyte, 214 "\t\t%lu packet%s (%lu byte%s) received in-sequence\n"); 215 p2(tcps_rcvduppack, tcps_rcvdupbyte, 216 "\t\t%lu completely duplicate packet%s (%lu byte%s)\n"); 217 p(tcps_pawsdrop, "\t\t%lu old duplicate packet%s\n"); 218 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 219 "\t\t%lu packet%s with some dup. data (%lu byte%s duped)\n"); 220 p2(tcps_rcvoopack, tcps_rcvoobyte, 221 "\t\t%lu out-of-order packet%s (%lu byte%s)\n"); 222 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 223 "\t\t%lu packet%s (%lu byte%s) of data after window\n"); 224 p(tcps_rcvwinprobe, "\t\t%lu window probe%s\n"); 225 p(tcps_rcvwinupd, "\t\t%lu window update packet%s\n"); 226 p(tcps_rcvafterclose, "\t\t%lu packet%s received after close\n"); 227 p(tcps_rcvbadsum, "\t\t%lu discarded for bad checksum%s\n"); 228 p(tcps_rcvbadoff, "\t\t%lu discarded for bad header offset field%s\n"); 229 ps(tcps_rcvshort, "\t\t%lu discarded because packet too short\n"); 230 p(tcps_connattempt, "\t%lu connection request%s\n"); 231 p(tcps_accepts, "\t%lu connection accept%s\n"); 232 p(tcps_connects, "\t%lu connection%s established (including accepts)\n"); 233 p2(tcps_closed, tcps_drops, 234 "\t%lu connection%s closed (including %lu drop%s)\n"); 235 p(tcps_conndrops, "\t%lu embryonic connection%s dropped\n"); 236 p2(tcps_rttupdated, tcps_segstimed, 237 "\t%lu segment%s updated rtt (of %lu attempt%s)\n"); 238 p(tcps_rexmttimeo, "\t%lu retransmit timeout%s\n"); 239 p(tcps_timeoutdrop, "\t\t%lu connection%s dropped by rexmit timeout\n"); 240 p2(tcps_persisttimeo, tcps_persistdrops, 241 "\t%lu persist timeout%s (resulting in %lu dropped connection%s)\n"); 242 p(tcps_keeptimeo, "\t%lu keepalive timeout%s\n"); 243 p(tcps_keepprobe, "\t\t%lu keepalive probe%s sent\n"); 244 p(tcps_keepdrops, "\t\t%lu connection%s dropped by keepalive\n"); 245 p(tcps_predack, "\t%lu correct ACK header prediction%s\n"); 246 p(tcps_preddat, "\t%lu correct data packet header prediction%s\n"); 247 p3(tcps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 248 ps(tcps_noport, "\t%lu dropped due to no socket\n"); 249 p(tcps_connsdrained, "\t%lu connection%s drained due to memory shortage\n"); 250 251 p(tcps_badsyn, "\t%lu bad connection attempt%s\n"); 252 ps(tcps_sc_added, "\t%lu SYN cache entries added\n"); 253 p(tcps_sc_collisions, "\t\t%lu hash collision%s\n"); 254 ps(tcps_sc_completed, "\t\t%lu completed\n"); 255 ps(tcps_sc_aborted, "\t\t%lu aborted (no space to build PCB)\n"); 256 ps(tcps_sc_timed_out, "\t\t%lu timed out\n"); 257 ps(tcps_sc_overflowed, "\t\t%lu dropped due to overflow\n"); 258 ps(tcps_sc_bucketoverflow, "\t\t%lu dropped due to bucket overflow\n"); 259 ps(tcps_sc_reset, "\t\t%lu dropped due to RST\n"); 260 ps(tcps_sc_unreach, "\t\t%lu dropped due to ICMP unreachable\n"); 261 p(tcps_sc_dupesyn, "\t%lu duplicate SYN%s received for entries already in the cache\n"); 262 p(tcps_sc_dropped, "\t%lu SYN%s dropped (no route or no space)\n"); 263 264 #undef p 265 #undef ps 266 #undef p2 267 #undef p2s 268 #undef p3 269 } 270 271 /* 272 * Dump UDP statistics structure. 273 */ 274 void 275 udp_stats(off, name) 276 u_long off; 277 char *name; 278 { 279 struct udpstat udpstat; 280 u_long delivered; 281 282 if (off == 0) 283 return; 284 printf("%s:\n", name); 285 kread(off, (char *)&udpstat, sizeof (udpstat)); 286 287 #define ps(f, m) if (udpstat.f || sflag <= 1) \ 288 printf(m, udpstat.f) 289 #define p(f, m) if (udpstat.f || sflag <= 1) \ 290 printf(m, udpstat.f, plural(udpstat.f)) 291 #define p3(f, m) if (udpstat.f || sflag <= 1) \ 292 printf(m, udpstat.f, plurales(udpstat.f)) 293 294 p(udps_ipackets, "\t%lu datagram%s received\n"); 295 ps(udps_hdrops, "\t%lu with incomplete header\n"); 296 ps(udps_badlen, "\t%lu with bad data length field\n"); 297 ps(udps_badsum, "\t%lu with bad checksum\n"); 298 ps(udps_noport, "\t%lu dropped due to no socket\n"); 299 p(udps_noportbcast, "\t%lu broadcast/multicast datagram%s dropped due to no socket\n"); 300 ps(udps_fullsock, "\t%lu dropped due to full socket buffers\n"); 301 delivered = udpstat.udps_ipackets - 302 udpstat.udps_hdrops - 303 udpstat.udps_badlen - 304 udpstat.udps_badsum - 305 udpstat.udps_noport - 306 udpstat.udps_noportbcast - 307 udpstat.udps_fullsock; 308 if (delivered || sflag <= 1) 309 printf("\t%lu delivered\n", delivered); 310 p3(udps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 311 p(udps_opackets, "\t%lu datagram%s output\n"); 312 313 #undef ps 314 #undef p 315 #undef p3 316 } 317 318 /* 319 * Dump IP statistics structure. 320 */ 321 void 322 ip_stats(off, name) 323 u_long off; 324 char *name; 325 { 326 struct ipstat ipstat; 327 328 if (off == 0) 329 return; 330 kread(off, (char *)&ipstat, sizeof (ipstat)); 331 printf("%s:\n", name); 332 333 #define ps(f, m) if (ipstat.f || sflag <= 1) \ 334 printf(m, ipstat.f) 335 #define p(f, m) if (ipstat.f || sflag <= 1) \ 336 printf(m, ipstat.f, plural(ipstat.f)) 337 338 p(ips_total, "\t%lu total packet%s received\n"); 339 p(ips_badsum, "\t%lu bad header checksum%s\n"); 340 ps(ips_toosmall, "\t%lu with size smaller than minimum\n"); 341 ps(ips_tooshort, "\t%lu with data size < data length\n"); 342 ps(ips_toolong, "\t%lu with length > max ip packet size\n"); 343 ps(ips_badhlen, "\t%lu with header length < data size\n"); 344 ps(ips_badlen, "\t%lu with data length < header length\n"); 345 ps(ips_badoptions, "\t%lu with bad options\n"); 346 ps(ips_badvers, "\t%lu with incorrect version number\n"); 347 p(ips_fragments, "\t%lu fragment%s received"); 348 p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n"); 349 p(ips_badfrags, "\t%lu malformed fragment%s dropped\n"); 350 p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n"); 351 p(ips_reassembled, "\t%lu packet%s reassembled ok\n"); 352 p(ips_delivered, "\t%lu packet%s for this host\n"); 353 p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n"); 354 p(ips_forward, "\t%lu packet%s forwarded"); 355 p(ips_fastforward, " (%lu packet%s fast forwarded)"); 356 if (ipstat.ips_forward || sflag <= 1) 357 putchar('\n'); 358 p(ips_cantforward, "\t%lu packet%s not forwardable\n"); 359 p(ips_redirectsent, "\t%lu redirect%s sent\n"); 360 p(ips_localout, "\t%lu packet%s sent from this host\n"); 361 p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n"); 362 p(ips_odropped, "\t%lu output packet%s dropped due to no bufs, etc.\n"); 363 p(ips_noroute, "\t%lu output packet%s discarded due to no route\n"); 364 p(ips_fragmented, "\t%lu output datagram%s fragmented\n"); 365 p(ips_ofragments, "\t%lu fragment%s created\n"); 366 p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n"); 367 #undef ps 368 #undef p 369 } 370 371 static char *icmpnames[] = { 372 "echo reply", 373 "#1", 374 "#2", 375 "destination unreachable", 376 "source quench", 377 "routing redirect", 378 "#6", 379 "#7", 380 "echo", 381 "#9", 382 "#10", 383 "time exceeded", 384 "parameter problem", 385 "time stamp", 386 "time stamp reply", 387 "information request", 388 "information request reply", 389 "address mask request", 390 "address mask reply", 391 }; 392 393 /* 394 * Dump ICMP statistics. 395 */ 396 void 397 icmp_stats(off, name) 398 u_long off; 399 char *name; 400 { 401 struct icmpstat icmpstat; 402 int i, first; 403 404 if (off == 0) 405 return; 406 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 407 printf("%s:\n", name); 408 409 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 410 printf(m, icmpstat.f, plural(icmpstat.f)) 411 412 p(icps_error, "\t%lu call%s to icmp_error\n"); 413 p(icps_oldicmp, 414 "\t%lu error%s not generated because old message was icmp\n"); 415 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 416 if (icmpstat.icps_outhist[i] != 0) { 417 if (first) { 418 printf("\tOutput histogram:\n"); 419 first = 0; 420 } 421 printf("\t\t%s: %lu\n", icmpnames[i], 422 icmpstat.icps_outhist[i]); 423 } 424 p(icps_badcode, "\t%lu message%s with bad code fields\n"); 425 p(icps_tooshort, "\t%lu message%s < minimum length\n"); 426 p(icps_checksum, "\t%lu bad checksum%s\n"); 427 p(icps_badlen, "\t%lu message%s with bad length\n"); 428 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 429 if (icmpstat.icps_inhist[i] != 0) { 430 if (first) { 431 printf("\tInput histogram:\n"); 432 first = 0; 433 } 434 printf("\t\t%s: %lu\n", icmpnames[i], 435 icmpstat.icps_inhist[i]); 436 } 437 p(icps_reflect, "\t%lu message response%s generated\n"); 438 #undef p 439 } 440 441 /* 442 * Dump IGMP statistics structure. 443 */ 444 void 445 igmp_stats(off, name) 446 u_long off; 447 char *name; 448 { 449 struct igmpstat igmpstat; 450 451 if (off == 0) 452 return; 453 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 454 printf("%s:\n", name); 455 456 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 457 printf(m, igmpstat.f, plural(igmpstat.f)) 458 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 459 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 460 p(igps_rcv_total, "\t%lu message%s received\n"); 461 p(igps_rcv_tooshort, "\t%lu message%s received with too few bytes\n"); 462 p(igps_rcv_badsum, "\t%lu message%s received with bad checksum\n"); 463 py(igps_rcv_queries, "\t%lu membership quer%s received\n"); 464 py(igps_rcv_badqueries, "\t%lu membership quer%s received with invalid field(s)\n"); 465 p(igps_rcv_reports, "\t%lu membership report%s received\n"); 466 p(igps_rcv_badreports, "\t%lu membership report%s received with invalid field(s)\n"); 467 p(igps_rcv_ourreports, "\t%lu membership report%s received for groups to which we belong\n"); 468 p(igps_snd_reports, "\t%lu membership report%s sent\n"); 469 #undef p 470 #undef py 471 } 472 473 /* 474 * Pretty print an Internet address (net address + port). 475 * If the nflag was specified, use numbers instead of names. 476 */ 477 void 478 inetprint(in, port, proto, numeric) 479 struct in_addr *in; 480 u_int16_t port; 481 const char *proto; 482 int numeric; 483 { 484 struct servent *sp = 0; 485 char line[80], *cp; 486 int width; 487 size_t space; 488 489 (void)snprintf(line, sizeof line, "%.*s.", 490 (Aflag && !numeric) ? 12 : 16, inetname(in)); 491 cp = strchr(line, '\0'); 492 if (!numeric && port) 493 sp = getservbyport((int)port, proto); 494 space = sizeof line - (cp-line); 495 if (sp || port == 0) 496 (void)snprintf(cp, space, "%.8s", sp ? sp->s_name : "*"); 497 else 498 (void)snprintf(cp, space, "%u", ntohs(port)); 499 width = Aflag ? 18 : 22; 500 (void)printf(" %-*.*s", width, width, line); 501 } 502 503 /* 504 * Construct an Internet address representation. 505 * If the nflag has been supplied, give 506 * numeric value, otherwise try for symbolic name. 507 */ 508 char * 509 inetname(inp) 510 struct in_addr *inp; 511 { 512 char *cp; 513 static char line[50]; 514 struct hostent *hp; 515 struct netent *np; 516 static char domain[MAXHOSTNAMELEN + 1]; 517 static int first = 1; 518 519 if (first && !nflag) { 520 first = 0; 521 if (gethostname(domain, sizeof domain) == 0) { 522 domain[sizeof(domain) - 1] = '\0'; 523 if ((cp = strchr(domain, '.'))) 524 (void) strcpy(domain, cp + 1); 525 else 526 domain[0] = 0; 527 } else 528 domain[0] = 0; 529 } 530 cp = 0; 531 if (!nflag && inp->s_addr != INADDR_ANY) { 532 int net = inet_netof(*inp); 533 int lna = inet_lnaof(*inp); 534 535 if (lna == INADDR_ANY) { 536 np = getnetbyaddr(net, AF_INET); 537 if (np) 538 cp = np->n_name; 539 } 540 if (cp == 0) { 541 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 542 if (hp) { 543 if ((cp = strchr(hp->h_name, '.')) && 544 !strcmp(cp + 1, domain)) 545 *cp = 0; 546 cp = hp->h_name; 547 } 548 } 549 } 550 if (inp->s_addr == INADDR_ANY) 551 strncpy(line, "*", sizeof line); 552 else if (cp) 553 strncpy(line, cp, sizeof line); 554 else { 555 inp->s_addr = ntohl(inp->s_addr); 556 #define C(x) ((x) & 0xff) 557 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 558 C(inp->s_addr >> 24), C(inp->s_addr >> 16), 559 C(inp->s_addr >> 8), C(inp->s_addr)); 560 #undef C 561 } 562 line[sizeof(line) - 1] = '\0'; 563 return (line); 564 } 565 566 /* 567 * Dump the contents of a TCP PCB. 568 */ 569 void 570 tcp_dump(pcbaddr) 571 u_long pcbaddr; 572 { 573 struct tcpcb tcpcb; 574 int i; 575 576 kread(pcbaddr, (char *)&tcpcb, sizeof(tcpcb)); 577 578 printf("TCP Protocol Control Block at 0x%08lx:\n\n", pcbaddr); 579 580 printf("Timers:\n"); 581 for (i = 0; i < TCPT_NTIMERS; i++) 582 printf("\t%s: %u", tcptimers[i], tcpcb.t_timer[i]); 583 printf("\n\n"); 584 585 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 586 printf("State: %d", tcpcb.t_state); 587 else 588 printf("State: %s", tcpstates[tcpcb.t_state]); 589 printf(", flags 0x%x, inpcb 0x%lx\n\n", tcpcb.t_flags, 590 (u_long)tcpcb.t_inpcb); 591 592 printf("rxtshift %d, rxtcur %d, dupacks %d\n", tcpcb.t_rxtshift, 593 tcpcb.t_rxtcur, tcpcb.t_dupacks); 594 printf("peermss %u, ourmss %u, segsz %u\n\n", tcpcb.t_peermss, 595 tcpcb.t_ourmss, tcpcb.t_segsz); 596 597 printf("snd_una %u, snd_nxt %u, snd_up %u\n", 598 tcpcb.snd_una, tcpcb.snd_nxt, tcpcb.snd_up); 599 printf("snd_wl1 %u, snd_wl2 %u, iss %u, snd_wnd %lu\n\n", 600 tcpcb.snd_wl1, tcpcb.snd_wl2, tcpcb.iss, tcpcb.snd_wnd); 601 602 printf("rcv_wnd %lu, rcv_nxt %u, rcv_up %u, irs %u\n\n", 603 tcpcb.rcv_wnd, tcpcb.rcv_nxt, tcpcb.rcv_up, tcpcb.irs); 604 605 printf("rcv_adv %u, snd_max %u, snd_cwnd %lu, snd_ssthresh %lu\n", 606 tcpcb.rcv_adv, tcpcb.snd_max, tcpcb.snd_cwnd, tcpcb.snd_ssthresh); 607 608 printf("idle %d, rtt %d, rtseq %u, srtt %d, rttvar %d, rttmin %d, " 609 "max_sndwnd %lu\n\n", tcpcb.t_idle, tcpcb.t_rtt, tcpcb.t_rtseq, 610 tcpcb.t_srtt, tcpcb.t_rttvar, tcpcb.t_rttmin, tcpcb.max_sndwnd); 611 612 printf("oobflags %d, iobc %d, softerror %d\n\n", tcpcb.t_oobflags, 613 tcpcb.t_iobc, tcpcb.t_softerror); 614 615 printf("snd_scale %d, rcv_scale %d, req_r_scale %d, req_s_scale %d\n", 616 tcpcb.snd_scale, tcpcb.rcv_scale, tcpcb.request_r_scale, 617 tcpcb.requested_s_scale); 618 printf("ts_recent %u, ts_regent_age %d, last_ack_sent %u\n", 619 tcpcb.ts_recent, tcpcb.ts_recent_age, tcpcb.last_ack_sent); 620 } 621
Indexes created Thu Oct 02 14:10:14 GMT 2025