inet.c revision 1.20
1 /* $NetBSD: inet.c,v 1.20 1997/04/03 04:46:46 christos 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 1.20 1997/04/03 04:46:46 christos 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("%8lp ", (u_long) inpcb.inp_ppcb); 144 else 145 printf("%8lp ", (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 #undef p 238 #undef ps 239 #undef p2 240 #undef p2s 241 #undef p3 242 } 243 244 /* 245 * Dump UDP statistics structure. 246 */ 247 void 248 udp_stats(off, name) 249 u_long off; 250 char *name; 251 { 252 struct udpstat udpstat; 253 u_long delivered; 254 255 if (off == 0) 256 return; 257 printf("%s:\n", name); 258 kread(off, (char *)&udpstat, sizeof (udpstat)); 259 260 #define ps(f, m) if (udpstat.f || sflag <= 1) \ 261 printf(m, udpstat.f) 262 #define p(f, m) if (udpstat.f || sflag <= 1) \ 263 printf(m, udpstat.f, plural(udpstat.f)) 264 #define p3(f, m) if (udpstat.f || sflag <= 1) \ 265 printf(m, udpstat.f, plurales(udpstat.f)) 266 267 p(udps_ipackets, "\t%lu datagram%s received\n"); 268 ps(udps_hdrops, "\t%lu with incomplete header\n"); 269 ps(udps_badlen, "\t%lu with bad data length field\n"); 270 ps(udps_badsum, "\t%lu with bad checksum\n"); 271 ps(udps_noport, "\t%lu dropped due to no socket\n"); 272 p(udps_noportbcast, "\t%lu broadcast/multicast datagram%s dropped due to no socket\n"); 273 ps(udps_fullsock, "\t%lu dropped due to full socket buffers\n"); 274 delivered = udpstat.udps_ipackets - 275 udpstat.udps_hdrops - 276 udpstat.udps_badlen - 277 udpstat.udps_badsum - 278 udpstat.udps_noport - 279 udpstat.udps_noportbcast - 280 udpstat.udps_fullsock; 281 if (delivered || sflag <= 1) 282 printf("\t%lu delivered\n", delivered); 283 p3(udps_pcbhashmiss, "\t%lu PCB hash miss%s\n"); 284 p(udps_opackets, "\t%lu datagram%s output\n"); 285 286 #undef ps 287 #undef p 288 #undef p3 289 } 290 291 /* 292 * Dump IP statistics structure. 293 */ 294 void 295 ip_stats(off, name) 296 u_long off; 297 char *name; 298 { 299 struct ipstat ipstat; 300 301 if (off == 0) 302 return; 303 kread(off, (char *)&ipstat, sizeof (ipstat)); 304 printf("%s:\n", name); 305 306 #define ps(f, m) if (ipstat.f || sflag <= 1) \ 307 printf(m, ipstat.f) 308 #define p(f, m) if (ipstat.f || sflag <= 1) \ 309 printf(m, ipstat.f, plural(ipstat.f)) 310 311 p(ips_total, "\t%lu total packet%s received\n"); 312 p(ips_badsum, "\t%lu bad header checksum%s\n"); 313 ps(ips_toosmall, "\t%lu with size smaller than minimum\n"); 314 ps(ips_tooshort, "\t%lu with data size < data length\n"); 315 ps(ips_toolong, "\t%lu with length > max ip packet size\n"); 316 ps(ips_badhlen, "\t%lu with header length < data size\n"); 317 ps(ips_badlen, "\t%lu with data length < header length\n"); 318 ps(ips_badoptions, "\t%lu with bad options\n"); 319 ps(ips_badvers, "\t%lu with incorrect version number\n"); 320 p(ips_fragments, "\t%lu fragment%s received\n"); 321 p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n"); 322 p(ips_badfrags, "\t%lu malformed fragment%s dropped\n"); 323 p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n"); 324 p(ips_reassembled, "\t%lu packet%s reassembled ok\n"); 325 p(ips_delivered, "\t%lu packet%s for this host\n"); 326 p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n"); 327 p(ips_forward, "\t%lu packet%s forwarded\n"); 328 p(ips_cantforward, "\t%lu packet%s not forwardable\n"); 329 p(ips_redirectsent, "\t%lu redirect%s sent\n"); 330 p(ips_localout, "\t%lu packet%s sent from this host\n"); 331 p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n"); 332 p(ips_odropped, "\t%lu output packet%s dropped due to no bufs, etc.\n"); 333 p(ips_noroute, "\t%lu output packet%s discarded due to no route\n"); 334 p(ips_fragmented, "\t%lu output datagram%s fragmented\n"); 335 p(ips_ofragments, "\t%lu fragment%s created\n"); 336 p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n"); 337 #undef ps 338 #undef p 339 } 340 341 static char *icmpnames[] = { 342 "echo reply", 343 "#1", 344 "#2", 345 "destination unreachable", 346 "source quench", 347 "routing redirect", 348 "#6", 349 "#7", 350 "echo", 351 "#9", 352 "#10", 353 "time exceeded", 354 "parameter problem", 355 "time stamp", 356 "time stamp reply", 357 "information request", 358 "information request reply", 359 "address mask request", 360 "address mask reply", 361 }; 362 363 /* 364 * Dump ICMP statistics. 365 */ 366 void 367 icmp_stats(off, name) 368 u_long off; 369 char *name; 370 { 371 struct icmpstat icmpstat; 372 register int i, first; 373 374 if (off == 0) 375 return; 376 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 377 printf("%s:\n", name); 378 379 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 380 printf(m, icmpstat.f, plural(icmpstat.f)) 381 382 p(icps_error, "\t%lu call%s to icmp_error\n"); 383 p(icps_oldicmp, 384 "\t%lu error%s not generated because old message was icmp\n"); 385 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 386 if (icmpstat.icps_outhist[i] != 0) { 387 if (first) { 388 printf("\tOutput histogram:\n"); 389 first = 0; 390 } 391 printf("\t\t%s: %lu\n", icmpnames[i], 392 icmpstat.icps_outhist[i]); 393 } 394 p(icps_badcode, "\t%lu message%s with bad code fields\n"); 395 p(icps_tooshort, "\t%lu message%s < minimum length\n"); 396 p(icps_checksum, "\t%lu bad checksum%s\n"); 397 p(icps_badlen, "\t%lu message%s with bad length\n"); 398 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 399 if (icmpstat.icps_inhist[i] != 0) { 400 if (first) { 401 printf("\tInput histogram:\n"); 402 first = 0; 403 } 404 printf("\t\t%s: %lu\n", icmpnames[i], 405 icmpstat.icps_inhist[i]); 406 } 407 p(icps_reflect, "\t%lu message response%s generated\n"); 408 #undef p 409 } 410 411 /* 412 * Dump IGMP statistics structure. 413 */ 414 void 415 igmp_stats(off, name) 416 u_long off; 417 char *name; 418 { 419 struct igmpstat igmpstat; 420 421 if (off == 0) 422 return; 423 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 424 printf("%s:\n", name); 425 426 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 427 printf(m, igmpstat.f, plural(igmpstat.f)) 428 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 429 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 430 p(igps_rcv_total, "\t%lu message%s received\n"); 431 p(igps_rcv_tooshort, "\t%lu message%s received with too few bytes\n"); 432 p(igps_rcv_badsum, "\t%lu message%s received with bad checksum\n"); 433 py(igps_rcv_queries, "\t%lu membership quer%s received\n"); 434 py(igps_rcv_badqueries, "\t%lu membership quer%s received with invalid field(s)\n"); 435 p(igps_rcv_reports, "\t%lu membership report%s received\n"); 436 p(igps_rcv_badreports, "\t%lu membership report%s received with invalid field(s)\n"); 437 p(igps_rcv_ourreports, "\t%lu membership report%s received for groups to which we belong\n"); 438 p(igps_snd_reports, "\t%lu membership report%s sent\n"); 439 #undef p 440 #undef py 441 } 442 443 /* 444 * Pretty print an Internet address (net address + port). 445 * If the nflag was specified, use numbers instead of names. 446 */ 447 void 448 inetprint(in, port, proto) 449 register struct in_addr *in; 450 int port; 451 char *proto; 452 { 453 struct servent *sp = 0; 454 char line[80], *cp; 455 int width; 456 457 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 458 cp = index(line, '\0'); 459 if (!nflag && port) 460 sp = getservbyport((int)port, proto); 461 if (sp || port == 0) 462 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 463 else 464 sprintf(cp, "%u", ntohs((u_short)port)); 465 width = Aflag ? 18 : 22; 466 printf(" %-*.*s", width, width, line); 467 } 468 469 /* 470 * Construct an Internet address representation. 471 * If the nflag has been supplied, give 472 * numeric value, otherwise try for symbolic name. 473 */ 474 char * 475 inetname(inp) 476 struct in_addr *inp; 477 { 478 register char *cp; 479 static char line[50]; 480 struct hostent *hp; 481 struct netent *np; 482 static char domain[MAXHOSTNAMELEN + 1]; 483 static int first = 1; 484 485 if (first && !nflag) { 486 first = 0; 487 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 488 (cp = index(domain, '.'))) 489 (void) strcpy(domain, cp + 1); 490 else 491 domain[0] = 0; 492 } 493 cp = 0; 494 if (!nflag && inp->s_addr != INADDR_ANY) { 495 int net = inet_netof(*inp); 496 int lna = inet_lnaof(*inp); 497 498 if (lna == INADDR_ANY) { 499 np = getnetbyaddr(net, AF_INET); 500 if (np) 501 cp = np->n_name; 502 } 503 if (cp == 0) { 504 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 505 if (hp) { 506 if ((cp = index(hp->h_name, '.')) && 507 !strcmp(cp + 1, domain)) 508 *cp = 0; 509 cp = hp->h_name; 510 } 511 } 512 } 513 if (inp->s_addr == INADDR_ANY) 514 strcpy(line, "*"); 515 else if (cp) 516 strcpy(line, cp); 517 else { 518 inp->s_addr = ntohl(inp->s_addr); 519 #define C(x) ((x) & 0xff) 520 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 521 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 522 } 523 return (line); 524 } 525
Indexes created Sun Sep 21 20:09:37 GMT 2025