inet.c revision 1.27
1 /* $NetBSD: inet.c,v 1.27 1997/12/17 06:17:26 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 1.27 1997/12/17 06:17:26 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 #include <netinet/tcp_timer.h> 67 #include <netinet/tcp_var.h> 68 #include <netinet/tcp_debug.h> 69 #include <netinet/udp.h> 70 #include <netinet/udp_var.h> 71 72 #include <arpa/inet.h> 73 #include <netdb.h> 74 #include <stdio.h> 75 #include <string.h> 76 #include <unistd.h> 77 #include "netstat.h" 78 79 struct inpcb inpcb; 80 struct tcpcb tcpcb; 81 struct socket sockb; 82 83 char *inetname __P((struct in_addr *)); 84 void inetprint __P((struct in_addr *, int, char *)); 85 86 /* 87 * Print a summary of connections related to an Internet 88 * protocol. For TCP, also give state of connection. 89 * Listening processes (aflag) are suppressed unless the 90 * -a (all) flag is specified. 91 */ 92 void 93 protopr(off, name) 94 u_long off; 95 char *name; 96 { 97 struct inpcbtable table; 98 struct inpcb *head, *next, *prev; 99 struct inpcb inpcb; 100 int istcp; 101 static int first = 1; 102 103 if (off == 0) 104 return; 105 istcp = strcmp(name, "tcp") == 0; 106 kread(off, (char *)&table, sizeof table); 107 prev = head = 108 (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue.cqh_first; 109 next = table.inpt_queue.cqh_first; 110 111 while (next != head) { 112 kread((u_long)next, (char *)&inpcb, sizeof inpcb); 113 if (inpcb.inp_queue.cqe_prev != prev) { 114 printf("???\n"); 115 break; 116 } 117 prev = next; 118 next = inpcb.inp_queue.cqe_next; 119 120 if (!aflag && 121 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 122 continue; 123 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 124 if (istcp) { 125 kread((u_long)inpcb.inp_ppcb, 126 (char *)&tcpcb, sizeof (tcpcb)); 127 } 128 if (first) { 129 printf("Active Internet connections"); 130 if (aflag) 131 printf(" (including servers)"); 132 putchar('\n'); 133 if (Aflag) 134 printf("%-8.8s ", "PCB"); 135 printf(Aflag ? 136 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 137 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 138 "Proto", "Recv-Q", "Send-Q", 139 "Local Address", "Foreign Address", "(state)"); 140 first = 0; 141 } 142 if (Aflag) 143 if (istcp) 144 printf("%8lx ", (u_long) inpcb.inp_ppcb); 145 else 146 printf("%8lx ", (u_long) prev); 147 printf("%-5.5s %6ld %6ld ", name, sockb.so_rcv.sb_cc, 148 sockb.so_snd.sb_cc); 149 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); 150 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); 151 if (istcp) { 152 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 153 printf(" %d", tcpcb.t_state); 154 else 155 printf(" %s", tcpstates[tcpcb.t_state]); 156 } 157 putchar('\n'); 158 } 159 } 160 161 /* 162 * Dump TCP statistics structure. 163 */ 164 void 165 tcp_stats(off, name) 166 u_long off; 167 char *name; 168 { 169 struct tcpstat tcpstat; 170 171 if (off == 0) 172 return; 173 printf ("%s:\n", name); 174 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 175 176 #define ps(f, m) if (tcpstat.f || sflag <= 1) \ 177 printf(m, tcpstat.f) 178 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 179 printf(m, tcpstat.f, plural(tcpstat.f)) 180 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 181 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 182 #define p2s(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 183 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2) 184 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 185 printf(m, tcpstat.f, plurales(tcpstat.f)) 186 187 p(tcps_sndtotal, "\t%lu packet%s sent\n"); 188 p2(tcps_sndpack,tcps_sndbyte, 189 "\t\t%lu data packet%s (%lu byte%s)\n"); 190 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 191 "\t\t%lu data packet%s (%lu byte%s) retransmitted\n"); 192 p2s(tcps_sndacks, tcps_delack, 193 "\t\t%lu ack-only packet%s (%lu delayed)\n"); 194 p(tcps_sndurg, "\t\t%lu URG only packet%s\n"); 195 p(tcps_sndprobe, "\t\t%lu window probe packet%s\n"); 196 p(tcps_sndwinup, "\t\t%lu window update packet%s\n"); 197 p(tcps_sndctrl, "\t\t%lu control packet%s\n"); 198 p(tcps_rcvtotal, "\t%lu packet%s received\n"); 199 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%lu ack%s (for %lu byte%s)\n"); 200 p(tcps_rcvdupack, "\t\t%lu duplicate ack%s\n"); 201 p(tcps_rcvacktoomuch, "\t\t%lu ack%s for unsent data\n"); 202 p2(tcps_rcvpack, tcps_rcvbyte, 203 "\t\t%lu packet%s (%lu byte%s) received in-sequence\n"); 204 p2(tcps_rcvduppack, tcps_rcvdupbyte, 205 "\t\t%lu completely duplicate packet%s (%lu byte%s)\n"); 206 p(tcps_pawsdrop, "\t\t%lu old duplicate packet%s\n"); 207 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 208 "\t\t%lu packet%s with some dup. data (%lu byte%s duped)\n"); 209 p2(tcps_rcvoopack, tcps_rcvoobyte, 210 "\t\t%lu out-of-order packet%s (%lu byte%s)\n"); 211 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 212 "\t\t%lu packet%s (%lu byte%s) of data after window\n"); 213 p(tcps_rcvwinprobe, "\t\t%lu window probe%s\n"); 214 p(tcps_rcvwinupd, "\t\t%lu window update packet%s\n"); 215 p(tcps_rcvafterclose, "\t\t%lu packet%s received after close\n"); 216 p(tcps_rcvbadsum, "\t\t%lu discarded for bad checksum%s\n"); 217 p(tcps_rcvbadoff, "\t\t%lu discarded for bad header offset field%s\n"); 218 ps(tcps_rcvshort, "\t\t%lu discarded because packet too short\n"); 219 p(tcps_connattempt, "\t%lu connection request%s\n"); 220 p(tcps_accepts, "\t%lu connection accept%s\n"); 221 p(tcps_connects, "\t%lu connection%s established (including accepts)\n"); 222 p2(tcps_closed, tcps_drops, 223 "\t%lu connection%s closed (including %lu drop%s)\n"); 224 p(tcps_conndrops, "\t%lu embryonic connection%s dropped\n"); 225 p2(tcps_rttupdated, tcps_segstimed, 226 "\t%lu segment%s updated rtt (of %lu attempt%s)\n"); 227 p(tcps_rexmttimeo, "\t%lu retransmit timeout%s\n"); 228 p(tcps_timeoutdrop, "\t\t%lu connection%s dropped by rexmit timeout\n"); 229 p2(tcps_persisttimeo, tcps_persistdrops, 230 "\t%lu persist timeout%s (resulting in %lu dropped connection%s)\n"); 231 p(tcps_keeptimeo, "\t%lu keepalive timeout%s\n"); 232 p(tcps_keepprobe, "\t\t%lu keepalive probe%s sent\n"); 233 p(tcps_keepdrops, "\t\t%lu connection%s dropped by keepalive\n"); 234 p(tcps_predack, "\t%lu correct ACK header prediction%s\n"); 235 p(tcps_preddat, "\t%lu correct data packet header prediction%s\n"); 236 p3(tcps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 237 ps(tcps_noport, "\t%lu dropped due to no socket\n"); 238 p(tcps_connsdrained, "\t%lu connection%s drained due to memory shortage\n"); 239 240 p(tcps_badsyn, "\t%lu bad connection attempt%s\n"); 241 ps(tcps_sc_added, "\t%lu SYN cache entries added\n"); 242 p(tcps_sc_collisions, "\t\t%lu hash collision%s\n"); 243 ps(tcps_sc_completed, "\t\t%lu completed\n"); 244 ps(tcps_sc_aborted, "\t\t%lu aborted (no space to build PCB)\n"); 245 ps(tcps_sc_timed_out, "\t\t%lu timed out\n"); 246 ps(tcps_sc_overflowed, "\t\t%lu dropped due to overflow\n"); 247 ps(tcps_sc_bucketoverflow, "\t\t%lu dropped due to bucket overflow\n"); 248 ps(tcps_sc_reset, "\t\t%lu dropped due to RST\n"); 249 ps(tcps_sc_unreach, "\t\t%lu dropped due to ICMP unreachable\n"); 250 p(tcps_sc_dupesyn, "\t%lu duplicate SYN%s received for entries already in the cache\n"); 251 p(tcps_sc_dropped, "\t%lu SYN%s dropped (no route or no space)\n"); 252 253 #undef p 254 #undef ps 255 #undef p2 256 #undef p2s 257 #undef p3 258 } 259 260 /* 261 * Dump UDP statistics structure. 262 */ 263 void 264 udp_stats(off, name) 265 u_long off; 266 char *name; 267 { 268 struct udpstat udpstat; 269 u_long delivered; 270 271 if (off == 0) 272 return; 273 printf("%s:\n", name); 274 kread(off, (char *)&udpstat, sizeof (udpstat)); 275 276 #define ps(f, m) if (udpstat.f || sflag <= 1) \ 277 printf(m, udpstat.f) 278 #define p(f, m) if (udpstat.f || sflag <= 1) \ 279 printf(m, udpstat.f, plural(udpstat.f)) 280 #define p3(f, m) if (udpstat.f || sflag <= 1) \ 281 printf(m, udpstat.f, plurales(udpstat.f)) 282 283 p(udps_ipackets, "\t%lu datagram%s received\n"); 284 ps(udps_hdrops, "\t%lu with incomplete header\n"); 285 ps(udps_badlen, "\t%lu with bad data length field\n"); 286 ps(udps_badsum, "\t%lu with bad checksum\n"); 287 ps(udps_noport, "\t%lu dropped due to no socket\n"); 288 p(udps_noportbcast, "\t%lu broadcast/multicast datagram%s dropped due to no socket\n"); 289 ps(udps_fullsock, "\t%lu dropped due to full socket buffers\n"); 290 delivered = udpstat.udps_ipackets - 291 udpstat.udps_hdrops - 292 udpstat.udps_badlen - 293 udpstat.udps_badsum - 294 udpstat.udps_noport - 295 udpstat.udps_noportbcast - 296 udpstat.udps_fullsock; 297 if (delivered || sflag <= 1) 298 printf("\t%lu delivered\n", delivered); 299 p3(udps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 300 p(udps_opackets, "\t%lu datagram%s output\n"); 301 302 #undef ps 303 #undef p 304 #undef p3 305 } 306 307 /* 308 * Dump IP statistics structure. 309 */ 310 void 311 ip_stats(off, name) 312 u_long off; 313 char *name; 314 { 315 struct ipstat ipstat; 316 317 if (off == 0) 318 return; 319 kread(off, (char *)&ipstat, sizeof (ipstat)); 320 printf("%s:\n", name); 321 322 #define ps(f, m) if (ipstat.f || sflag <= 1) \ 323 printf(m, ipstat.f) 324 #define p(f, m) if (ipstat.f || sflag <= 1) \ 325 printf(m, ipstat.f, plural(ipstat.f)) 326 327 p(ips_total, "\t%lu total packet%s received\n"); 328 p(ips_badsum, "\t%lu bad header checksum%s\n"); 329 ps(ips_toosmall, "\t%lu with size smaller than minimum\n"); 330 ps(ips_tooshort, "\t%lu with data size < data length\n"); 331 ps(ips_toolong, "\t%lu with length > max ip packet size\n"); 332 ps(ips_badhlen, "\t%lu with header length < data size\n"); 333 ps(ips_badlen, "\t%lu with data length < header length\n"); 334 ps(ips_badoptions, "\t%lu with bad options\n"); 335 ps(ips_badvers, "\t%lu with incorrect version number\n"); 336 p(ips_fragments, "\t%lu fragment%s received\n"); 337 p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n"); 338 p(ips_badfrags, "\t%lu malformed fragment%s dropped\n"); 339 p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n"); 340 p(ips_reassembled, "\t%lu packet%s reassembled ok\n"); 341 p(ips_delivered, "\t%lu packet%s for this host\n"); 342 p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n"); 343 p(ips_forward, "\t%lu packet%s forwarded\n"); 344 p(ips_cantforward, "\t%lu packet%s not forwardable\n"); 345 p(ips_redirectsent, "\t%lu redirect%s sent\n"); 346 p(ips_localout, "\t%lu packet%s sent from this host\n"); 347 p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n"); 348 p(ips_odropped, "\t%lu output packet%s dropped due to no bufs, etc.\n"); 349 p(ips_noroute, "\t%lu output packet%s discarded due to no route\n"); 350 p(ips_fragmented, "\t%lu output datagram%s fragmented\n"); 351 p(ips_ofragments, "\t%lu fragment%s created\n"); 352 p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n"); 353 #undef ps 354 #undef p 355 } 356 357 static char *icmpnames[] = { 358 "echo reply", 359 "#1", 360 "#2", 361 "destination unreachable", 362 "source quench", 363 "routing redirect", 364 "#6", 365 "#7", 366 "echo", 367 "#9", 368 "#10", 369 "time exceeded", 370 "parameter problem", 371 "time stamp", 372 "time stamp reply", 373 "information request", 374 "information request reply", 375 "address mask request", 376 "address mask reply", 377 }; 378 379 /* 380 * Dump ICMP statistics. 381 */ 382 void 383 icmp_stats(off, name) 384 u_long off; 385 char *name; 386 { 387 struct icmpstat icmpstat; 388 int i, first; 389 390 if (off == 0) 391 return; 392 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 393 printf("%s:\n", name); 394 395 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 396 printf(m, icmpstat.f, plural(icmpstat.f)) 397 398 p(icps_error, "\t%lu call%s to icmp_error\n"); 399 p(icps_oldicmp, 400 "\t%lu error%s not generated because old message was icmp\n"); 401 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 402 if (icmpstat.icps_outhist[i] != 0) { 403 if (first) { 404 printf("\tOutput histogram:\n"); 405 first = 0; 406 } 407 printf("\t\t%s: %lu\n", icmpnames[i], 408 icmpstat.icps_outhist[i]); 409 } 410 p(icps_badcode, "\t%lu message%s with bad code fields\n"); 411 p(icps_tooshort, "\t%lu message%s < minimum length\n"); 412 p(icps_checksum, "\t%lu bad checksum%s\n"); 413 p(icps_badlen, "\t%lu message%s with bad length\n"); 414 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 415 if (icmpstat.icps_inhist[i] != 0) { 416 if (first) { 417 printf("\tInput histogram:\n"); 418 first = 0; 419 } 420 printf("\t\t%s: %lu\n", icmpnames[i], 421 icmpstat.icps_inhist[i]); 422 } 423 p(icps_reflect, "\t%lu message response%s generated\n"); 424 #undef p 425 } 426 427 /* 428 * Dump IGMP statistics structure. 429 */ 430 void 431 igmp_stats(off, name) 432 u_long off; 433 char *name; 434 { 435 struct igmpstat igmpstat; 436 437 if (off == 0) 438 return; 439 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 440 printf("%s:\n", name); 441 442 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 443 printf(m, igmpstat.f, plural(igmpstat.f)) 444 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 445 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 446 p(igps_rcv_total, "\t%lu message%s received\n"); 447 p(igps_rcv_tooshort, "\t%lu message%s received with too few bytes\n"); 448 p(igps_rcv_badsum, "\t%lu message%s received with bad checksum\n"); 449 py(igps_rcv_queries, "\t%lu membership quer%s received\n"); 450 py(igps_rcv_badqueries, "\t%lu membership quer%s received with invalid field(s)\n"); 451 p(igps_rcv_reports, "\t%lu membership report%s received\n"); 452 p(igps_rcv_badreports, "\t%lu membership report%s received with invalid field(s)\n"); 453 p(igps_rcv_ourreports, "\t%lu membership report%s received for groups to which we belong\n"); 454 p(igps_snd_reports, "\t%lu membership report%s sent\n"); 455 #undef p 456 #undef py 457 } 458 459 /* 460 * Pretty print an Internet address (net address + port). 461 * If the nflag was specified, use numbers instead of names. 462 */ 463 void 464 inetprint(in, port, proto) 465 struct in_addr *in; 466 int port; 467 char *proto; 468 { 469 struct servent *sp = 0; 470 char line[80], *cp; 471 int width; 472 473 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 474 cp = strchr(line, '\0'); 475 if (!nflag && port) 476 sp = getservbyport((int)port, proto); 477 if (sp || port == 0) 478 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 479 else 480 sprintf(cp, "%u", ntohs((u_short)port)); 481 width = Aflag ? 18 : 22; 482 printf(" %-*.*s", width, width, line); 483 } 484 485 /* 486 * Construct an Internet address representation. 487 * If the nflag has been supplied, give 488 * numeric value, otherwise try for symbolic name. 489 */ 490 char * 491 inetname(inp) 492 struct in_addr *inp; 493 { 494 char *cp; 495 static char line[50]; 496 struct hostent *hp; 497 struct netent *np; 498 static char domain[MAXHOSTNAMELEN + 1]; 499 static int first = 1; 500 501 if (first && !nflag) { 502 first = 0; 503 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 504 (cp = strchr(domain, '.'))) 505 (void) strcpy(domain, cp + 1); 506 else 507 domain[0] = 0; 508 } 509 cp = 0; 510 if (!nflag && inp->s_addr != INADDR_ANY) { 511 int net = inet_netof(*inp); 512 int lna = inet_lnaof(*inp); 513 514 if (lna == INADDR_ANY) { 515 np = getnetbyaddr(net, AF_INET); 516 if (np) 517 cp = np->n_name; 518 } 519 if (cp == 0) { 520 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 521 if (hp) { 522 if ((cp = strchr(hp->h_name, '.')) && 523 !strcmp(cp + 1, domain)) 524 *cp = 0; 525 cp = hp->h_name; 526 } 527 } 528 } 529 if (inp->s_addr == INADDR_ANY) 530 strcpy(line, "*"); 531 else if (cp) 532 strcpy(line, cp); 533 else { 534 inp->s_addr = ntohl(inp->s_addr); 535 #define C(x) ((x) & 0xff) 536 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 537 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 538 } 539 return (line); 540 } 541
Indexes created Sun Sep 21 18:09:52 GMT 2025