inet.c revision 1.22
1 /* $NetBSD: inet.c,v 1.22 1997/07/23 21:31:27 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "from: @(#)inet.c 8.4 (Berkeley) 4/20/94"; 39 #else 40 static char *rcsid = "$NetBSD: inet.c,v 1.22 1997/07/23 21:31:27 thorpej Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/queue.h> 46 #include <sys/socket.h> 47 #include <sys/socketvar.h> 48 #include <sys/mbuf.h> 49 #include <sys/protosw.h> 50 51 #include <net/route.h> 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> 54 #include <netinet/ip.h> 55 #include <netinet/in_pcb.h> 56 #include <netinet/ip_icmp.h> 57 #include <netinet/icmp_var.h> 58 #include <netinet/igmp_var.h> 59 #include <netinet/ip_var.h> 60 #include <netinet/tcp.h> 61 #include <netinet/tcpip.h> 62 #include <netinet/tcp_seq.h> 63 #define TCPSTATES 64 #include <netinet/tcp_fsm.h> 65 #include <netinet/tcp_timer.h> 66 #include <netinet/tcp_var.h> 67 #include <netinet/tcp_debug.h> 68 #include <netinet/udp.h> 69 #include <netinet/udp_var.h> 70 71 #include <arpa/inet.h> 72 #include <netdb.h> 73 #include <stdio.h> 74 #include <string.h> 75 #include <unistd.h> 76 #include "netstat.h" 77 78 struct inpcb inpcb; 79 struct tcpcb tcpcb; 80 struct socket sockb; 81 82 char *inetname __P((struct in_addr *)); 83 void inetprint __P((struct in_addr *, int, char *)); 84 85 /* 86 * Print a summary of connections related to an Internet 87 * protocol. For TCP, also give state of connection. 88 * Listening processes (aflag) are suppressed unless the 89 * -a (all) flag is specified. 90 */ 91 void 92 protopr(off, name) 93 u_long off; 94 char *name; 95 { 96 struct inpcbtable table; 97 register struct inpcb *head, *next, *prev; 98 struct inpcb inpcb; 99 int istcp; 100 static int first = 1; 101 102 if (off == 0) 103 return; 104 istcp = strcmp(name, "tcp") == 0; 105 kread(off, (char *)&table, sizeof table); 106 prev = head = 107 (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue.cqh_first; 108 next = table.inpt_queue.cqh_first; 109 110 while (next != head) { 111 kread((u_long)next, (char *)&inpcb, sizeof inpcb); 112 if (inpcb.inp_queue.cqe_prev != prev) { 113 printf("???\n"); 114 break; 115 } 116 prev = next; 117 next = inpcb.inp_queue.cqe_next; 118 119 if (!aflag && 120 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 121 continue; 122 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 123 if (istcp) { 124 kread((u_long)inpcb.inp_ppcb, 125 (char *)&tcpcb, sizeof (tcpcb)); 126 } 127 if (first) { 128 printf("Active Internet connections"); 129 if (aflag) 130 printf(" (including servers)"); 131 putchar('\n'); 132 if (Aflag) 133 printf("%-8.8s ", "PCB"); 134 printf(Aflag ? 135 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 136 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 137 "Proto", "Recv-Q", "Send-Q", 138 "Local Address", "Foreign Address", "(state)"); 139 first = 0; 140 } 141 if (Aflag) 142 if (istcp) 143 printf("%8lx ", (u_long) inpcb.inp_ppcb); 144 else 145 printf("%8lx ", (u_long) prev); 146 printf("%-5.5s %6ld %6ld ", name, sockb.so_rcv.sb_cc, 147 sockb.so_snd.sb_cc); 148 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); 149 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); 150 if (istcp) { 151 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 152 printf(" %d", tcpcb.t_state); 153 else 154 printf(" %s", tcpstates[tcpcb.t_state]); 155 } 156 putchar('\n'); 157 } 158 } 159 160 /* 161 * Dump TCP statistics structure. 162 */ 163 void 164 tcp_stats(off, name) 165 u_long off; 166 char *name; 167 { 168 struct tcpstat tcpstat; 169 170 if (off == 0) 171 return; 172 printf ("%s:\n", name); 173 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 174 175 #define ps(f, m) if (tcpstat.f || sflag <= 1) \ 176 printf(m, tcpstat.f) 177 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 178 printf(m, tcpstat.f, plural(tcpstat.f)) 179 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 180 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 181 #define p2s(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 182 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2) 183 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 184 printf(m, tcpstat.f, plurales(tcpstat.f)) 185 186 p(tcps_sndtotal, "\t%lu packet%s sent\n"); 187 p2(tcps_sndpack,tcps_sndbyte, 188 "\t\t%lu data packet%s (%lu byte%s)\n"); 189 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 190 "\t\t%lu data packet%s (%lu byte%s) retransmitted\n"); 191 p2s(tcps_sndacks, tcps_delack, 192 "\t\t%lu ack-only packet%s (%lu delayed)\n"); 193 p(tcps_sndurg, "\t\t%lu URG only packet%s\n"); 194 p(tcps_sndprobe, "\t\t%lu window probe packet%s\n"); 195 p(tcps_sndwinup, "\t\t%lu window update packet%s\n"); 196 p(tcps_sndctrl, "\t\t%lu control packet%s\n"); 197 p(tcps_rcvtotal, "\t%lu packet%s received\n"); 198 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%lu ack%s (for %lu byte%s)\n"); 199 p(tcps_rcvdupack, "\t\t%lu duplicate ack%s\n"); 200 p(tcps_rcvacktoomuch, "\t\t%lu ack%s for unsent data\n"); 201 p2(tcps_rcvpack, tcps_rcvbyte, 202 "\t\t%lu packet%s (%lu byte%s) received in-sequence\n"); 203 p2(tcps_rcvduppack, tcps_rcvdupbyte, 204 "\t\t%lu completely duplicate packet%s (%lu byte%s)\n"); 205 p(tcps_pawsdrop, "\t\t%lu old duplicate packet%s\n"); 206 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 207 "\t\t%lu packet%s with some dup. data (%lu byte%s duped)\n"); 208 p2(tcps_rcvoopack, tcps_rcvoobyte, 209 "\t\t%lu out-of-order packet%s (%lu byte%s)\n"); 210 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 211 "\t\t%lu packet%s (%lu byte%s) of data after window\n"); 212 p(tcps_rcvwinprobe, "\t\t%lu window probe%s\n"); 213 p(tcps_rcvwinupd, "\t\t%lu window update packet%s\n"); 214 p(tcps_rcvafterclose, "\t\t%lu packet%s received after close\n"); 215 p(tcps_rcvbadsum, "\t\t%lu discarded for bad checksum%s\n"); 216 p(tcps_rcvbadoff, "\t\t%lu discarded for bad header offset field%s\n"); 217 ps(tcps_rcvshort, "\t\t%lu discarded because packet too short\n"); 218 p(tcps_connattempt, "\t%lu connection request%s\n"); 219 p(tcps_accepts, "\t%lu connection accept%s\n"); 220 p(tcps_connects, "\t%lu connection%s established (including accepts)\n"); 221 p2(tcps_closed, tcps_drops, 222 "\t%lu connection%s closed (including %lu drop%s)\n"); 223 p(tcps_conndrops, "\t%lu embryonic connection%s dropped\n"); 224 p2(tcps_rttupdated, tcps_segstimed, 225 "\t%lu segment%s updated rtt (of %lu attempt%s)\n"); 226 p(tcps_rexmttimeo, "\t%lu retransmit timeout%s\n"); 227 p(tcps_timeoutdrop, "\t\t%lu connection%s dropped by rexmit timeout\n"); 228 p(tcps_persisttimeo, "\t%lu persist timeout%s\n"); 229 p(tcps_keeptimeo, "\t%lu keepalive timeout%s\n"); 230 p(tcps_keepprobe, "\t\t%lu keepalive probe%s sent\n"); 231 p(tcps_keepdrops, "\t\t%lu connection%s dropped by keepalive\n"); 232 p(tcps_predack, "\t%lu correct ACK header prediction%s\n"); 233 p(tcps_preddat, "\t%lu correct data packet header prediction%s\n"); 234 p3(tcps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 235 ps(tcps_noport, "\t%lu dropped due to no socket\n"); 236 237 p(tcps_badsyn, "\t%lu bad connection attempt%s\n"); 238 ps(tcps_sc_added, "\t%lu SYN cache entries added\n"); 239 p(tcps_sc_collisions, "\t\t%lu hash collision%s\n"); 240 ps(tcps_sc_completed, "\t\t%lu completed\n"); 241 ps(tcps_sc_aborted, "\t\t%lu aborted (no space to build PCB)\n"); 242 ps(tcps_sc_timed_out, "\t\t%lu timed out\n"); 243 ps(tcps_sc_overflowed, "\t\t%lu dropped due to overflow\n"); 244 ps(tcps_sc_bucketoverflow, "\t\t%lu dropped due to bucket overflow\n"); 245 ps(tcps_sc_reset, "\t\t%lu dropped due to RST\n"); 246 ps(tcps_sc_unreach, "\t\t%lu dropped due to ICMP unreachable\n"); 247 p(tcps_sc_dupesyn, "\t%lu duplicate SYN%s received for entries already in the cache\n"); 248 p(tcps_sc_dropped, "\t%lu SYN%s dropped (no route or no space)\n"); 249 250 #undef p 251 #undef ps 252 #undef p2 253 #undef p2s 254 #undef p3 255 } 256 257 /* 258 * Dump UDP statistics structure. 259 */ 260 void 261 udp_stats(off, name) 262 u_long off; 263 char *name; 264 { 265 struct udpstat udpstat; 266 u_long delivered; 267 268 if (off == 0) 269 return; 270 printf("%s:\n", name); 271 kread(off, (char *)&udpstat, sizeof (udpstat)); 272 273 #define ps(f, m) if (udpstat.f || sflag <= 1) \ 274 printf(m, udpstat.f) 275 #define p(f, m) if (udpstat.f || sflag <= 1) \ 276 printf(m, udpstat.f, plural(udpstat.f)) 277 #define p3(f, m) if (udpstat.f || sflag <= 1) \ 278 printf(m, udpstat.f, plurales(udpstat.f)) 279 280 p(udps_ipackets, "\t%lu datagram%s received\n"); 281 ps(udps_hdrops, "\t%lu with incomplete header\n"); 282 ps(udps_badlen, "\t%lu with bad data length field\n"); 283 ps(udps_badsum, "\t%lu with bad checksum\n"); 284 ps(udps_noport, "\t%lu dropped due to no socket\n"); 285 p(udps_noportbcast, "\t%lu broadcast/multicast datagram%s dropped due to no socket\n"); 286 ps(udps_fullsock, "\t%lu dropped due to full socket buffers\n"); 287 delivered = udpstat.udps_ipackets - 288 udpstat.udps_hdrops - 289 udpstat.udps_badlen - 290 udpstat.udps_badsum - 291 udpstat.udps_noport - 292 udpstat.udps_noportbcast - 293 udpstat.udps_fullsock; 294 if (delivered || sflag <= 1) 295 printf("\t%lu delivered\n", delivered); 296 p3(udps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 297 p(udps_opackets, "\t%lu datagram%s output\n"); 298 299 #undef ps 300 #undef p 301 #undef p3 302 } 303 304 /* 305 * Dump IP statistics structure. 306 */ 307 void 308 ip_stats(off, name) 309 u_long off; 310 char *name; 311 { 312 struct ipstat ipstat; 313 314 if (off == 0) 315 return; 316 kread(off, (char *)&ipstat, sizeof (ipstat)); 317 printf("%s:\n", name); 318 319 #define ps(f, m) if (ipstat.f || sflag <= 1) \ 320 printf(m, ipstat.f) 321 #define p(f, m) if (ipstat.f || sflag <= 1) \ 322 printf(m, ipstat.f, plural(ipstat.f)) 323 324 p(ips_total, "\t%lu total packet%s received\n"); 325 p(ips_badsum, "\t%lu bad header checksum%s\n"); 326 ps(ips_toosmall, "\t%lu with size smaller than minimum\n"); 327 ps(ips_tooshort, "\t%lu with data size < data length\n"); 328 ps(ips_toolong, "\t%lu with length > max ip packet size\n"); 329 ps(ips_badhlen, "\t%lu with header length < data size\n"); 330 ps(ips_badlen, "\t%lu with data length < header length\n"); 331 ps(ips_badoptions, "\t%lu with bad options\n"); 332 ps(ips_badvers, "\t%lu with incorrect version number\n"); 333 p(ips_fragments, "\t%lu fragment%s received\n"); 334 p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n"); 335 p(ips_badfrags, "\t%lu malformed fragment%s dropped\n"); 336 p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n"); 337 p(ips_reassembled, "\t%lu packet%s reassembled ok\n"); 338 p(ips_delivered, "\t%lu packet%s for this host\n"); 339 p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n"); 340 p(ips_forward, "\t%lu packet%s forwarded\n"); 341 p(ips_cantforward, "\t%lu packet%s not forwardable\n"); 342 p(ips_redirectsent, "\t%lu redirect%s sent\n"); 343 p(ips_localout, "\t%lu packet%s sent from this host\n"); 344 p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n"); 345 p(ips_odropped, "\t%lu output packet%s dropped due to no bufs, etc.\n"); 346 p(ips_noroute, "\t%lu output packet%s discarded due to no route\n"); 347 p(ips_fragmented, "\t%lu output datagram%s fragmented\n"); 348 p(ips_ofragments, "\t%lu fragment%s created\n"); 349 p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n"); 350 #undef ps 351 #undef p 352 } 353 354 static char *icmpnames[] = { 355 "echo reply", 356 "#1", 357 "#2", 358 "destination unreachable", 359 "source quench", 360 "routing redirect", 361 "#6", 362 "#7", 363 "echo", 364 "#9", 365 "#10", 366 "time exceeded", 367 "parameter problem", 368 "time stamp", 369 "time stamp reply", 370 "information request", 371 "information request reply", 372 "address mask request", 373 "address mask reply", 374 }; 375 376 /* 377 * Dump ICMP statistics. 378 */ 379 void 380 icmp_stats(off, name) 381 u_long off; 382 char *name; 383 { 384 struct icmpstat icmpstat; 385 register int i, first; 386 387 if (off == 0) 388 return; 389 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 390 printf("%s:\n", name); 391 392 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 393 printf(m, icmpstat.f, plural(icmpstat.f)) 394 395 p(icps_error, "\t%lu call%s to icmp_error\n"); 396 p(icps_oldicmp, 397 "\t%lu error%s not generated because old message was icmp\n"); 398 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 399 if (icmpstat.icps_outhist[i] != 0) { 400 if (first) { 401 printf("\tOutput histogram:\n"); 402 first = 0; 403 } 404 printf("\t\t%s: %lu\n", icmpnames[i], 405 icmpstat.icps_outhist[i]); 406 } 407 p(icps_badcode, "\t%lu message%s with bad code fields\n"); 408 p(icps_tooshort, "\t%lu message%s < minimum length\n"); 409 p(icps_checksum, "\t%lu bad checksum%s\n"); 410 p(icps_badlen, "\t%lu message%s with bad length\n"); 411 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 412 if (icmpstat.icps_inhist[i] != 0) { 413 if (first) { 414 printf("\tInput histogram:\n"); 415 first = 0; 416 } 417 printf("\t\t%s: %lu\n", icmpnames[i], 418 icmpstat.icps_inhist[i]); 419 } 420 p(icps_reflect, "\t%lu message response%s generated\n"); 421 #undef p 422 } 423 424 /* 425 * Dump IGMP statistics structure. 426 */ 427 void 428 igmp_stats(off, name) 429 u_long off; 430 char *name; 431 { 432 struct igmpstat igmpstat; 433 434 if (off == 0) 435 return; 436 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 437 printf("%s:\n", name); 438 439 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 440 printf(m, igmpstat.f, plural(igmpstat.f)) 441 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 442 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 443 p(igps_rcv_total, "\t%lu message%s received\n"); 444 p(igps_rcv_tooshort, "\t%lu message%s received with too few bytes\n"); 445 p(igps_rcv_badsum, "\t%lu message%s received with bad checksum\n"); 446 py(igps_rcv_queries, "\t%lu membership quer%s received\n"); 447 py(igps_rcv_badqueries, "\t%lu membership quer%s received with invalid field(s)\n"); 448 p(igps_rcv_reports, "\t%lu membership report%s received\n"); 449 p(igps_rcv_badreports, "\t%lu membership report%s received with invalid field(s)\n"); 450 p(igps_rcv_ourreports, "\t%lu membership report%s received for groups to which we belong\n"); 451 p(igps_snd_reports, "\t%lu membership report%s sent\n"); 452 #undef p 453 #undef py 454 } 455 456 /* 457 * Pretty print an Internet address (net address + port). 458 * If the nflag was specified, use numbers instead of names. 459 */ 460 void 461 inetprint(in, port, proto) 462 register struct in_addr *in; 463 int port; 464 char *proto; 465 { 466 struct servent *sp = 0; 467 char line[80], *cp; 468 int width; 469 470 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 471 cp = index(line, '\0'); 472 if (!nflag && port) 473 sp = getservbyport((int)port, proto); 474 if (sp || port == 0) 475 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 476 else 477 sprintf(cp, "%u", ntohs((u_short)port)); 478 width = Aflag ? 18 : 22; 479 printf(" %-*.*s", width, width, line); 480 } 481 482 /* 483 * Construct an Internet address representation. 484 * If the nflag has been supplied, give 485 * numeric value, otherwise try for symbolic name. 486 */ 487 char * 488 inetname(inp) 489 struct in_addr *inp; 490 { 491 register char *cp; 492 static char line[50]; 493 struct hostent *hp; 494 struct netent *np; 495 static char domain[MAXHOSTNAMELEN + 1]; 496 static int first = 1; 497 498 if (first && !nflag) { 499 first = 0; 500 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 501 (cp = index(domain, '.'))) 502 (void) strcpy(domain, cp + 1); 503 else 504 domain[0] = 0; 505 } 506 cp = 0; 507 if (!nflag && inp->s_addr != INADDR_ANY) { 508 int net = inet_netof(*inp); 509 int lna = inet_lnaof(*inp); 510 511 if (lna == INADDR_ANY) { 512 np = getnetbyaddr(net, AF_INET); 513 if (np) 514 cp = np->n_name; 515 } 516 if (cp == 0) { 517 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 518 if (hp) { 519 if ((cp = index(hp->h_name, '.')) && 520 !strcmp(cp + 1, domain)) 521 *cp = 0; 522 cp = hp->h_name; 523 } 524 } 525 } 526 if (inp->s_addr == INADDR_ANY) 527 strcpy(line, "*"); 528 else if (cp) 529 strcpy(line, cp); 530 else { 531 inp->s_addr = ntohl(inp->s_addr); 532 #define C(x) ((x) & 0xff) 533 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 534 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 535 } 536 return (line); 537 } 538
Indexes created Mon Sep 22 05:09:51 GMT 2025