inet.c revision 1.14
1 /* $NetBSD: inet.c,v 1.14 1995/10/03 21:42:37 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 1.14 1995/10/03 21:42:37 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("%8x ", inpcb.inp_ppcb); 144 else 145 printf("%8x ", prev); 146 printf("%-5.5s %6d %6d ", 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 p(f, m) if (tcpstat.f || sflag <= 1) \ 176 printf(m, tcpstat.f, plural(tcpstat.f)) 177 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 178 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 179 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 180 printf(m, tcpstat.f, plurales(tcpstat.f)) 181 182 p(tcps_sndtotal, "\t%d packet%s sent\n"); 183 p2(tcps_sndpack,tcps_sndbyte, 184 "\t\t%d data packet%s (%d byte%s)\n"); 185 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 186 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 187 p2(tcps_sndacks, tcps_delack, 188 "\t\t%d ack-only packet%s (%d delayed)\n"); 189 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 190 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 191 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 192 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 193 p(tcps_rcvtotal, "\t%d packet%s received\n"); 194 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 195 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 196 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 197 p2(tcps_rcvpack, tcps_rcvbyte, 198 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 199 p2(tcps_rcvduppack, tcps_rcvdupbyte, 200 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 201 p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n"); 202 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 203 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 204 p2(tcps_rcvoopack, tcps_rcvoobyte, 205 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 206 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 207 "\t\t%d packet%s (%d byte%s) of data after window\n"); 208 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 209 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 210 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 211 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 212 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 213 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 214 p(tcps_connattempt, "\t%d connection request%s\n"); 215 p(tcps_accepts, "\t%d connection accept%s\n"); 216 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 217 p2(tcps_closed, tcps_drops, 218 "\t%d connection%s closed (including %d drop%s)\n"); 219 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 220 p2(tcps_rttupdated, tcps_segstimed, 221 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 222 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 223 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 224 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 225 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 226 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 227 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 228 p(tcps_predack, "\t%d correct ACK header prediction%s\n"); 229 p(tcps_preddat, "\t%d correct data packet header prediction%s\n"); 230 p3(tcps_pcbcachemiss, "\t%d PCB cache miss%s\n"); 231 #undef p 232 #undef p2 233 #undef p3 234 } 235 236 /* 237 * Dump UDP statistics structure. 238 */ 239 void 240 udp_stats(off, name) 241 u_long off; 242 char *name; 243 { 244 struct udpstat udpstat; 245 u_long delivered; 246 247 if (off == 0) 248 return; 249 kread(off, (char *)&udpstat, sizeof (udpstat)); 250 printf("%s:\n", name); 251 #define p(f, m) if (udpstat.f || sflag <= 1) \ 252 printf(m, udpstat.f, plural(udpstat.f)) 253 p(udps_ipackets, "\t%u datagram%s received\n"); 254 p(udps_hdrops, "\t%u with incomplete header\n"); 255 p(udps_badlen, "\t%u with bad data length field\n"); 256 p(udps_badsum, "\t%u with bad checksum\n"); 257 p(udps_noport, "\t%u dropped due to no socket\n"); 258 p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n"); 259 p(udps_fullsock, "\t%u dropped due to full socket buffers\n"); 260 delivered = udpstat.udps_ipackets - 261 udpstat.udps_hdrops - 262 udpstat.udps_badlen - 263 udpstat.udps_badsum - 264 udpstat.udps_noport - 265 udpstat.udps_noportbcast - 266 udpstat.udps_fullsock; 267 if (delivered || sflag <= 1) 268 printf("\t%u delivered\n", delivered); 269 p(udps_opackets, "\t%u datagram%s output\n"); 270 #undef p 271 } 272 273 /* 274 * Dump IP statistics structure. 275 */ 276 void 277 ip_stats(off, name) 278 u_long off; 279 char *name; 280 { 281 struct ipstat ipstat; 282 283 if (off == 0) 284 return; 285 kread(off, (char *)&ipstat, sizeof (ipstat)); 286 printf("%s:\n", name); 287 288 #define p(f, m) if (ipstat.f || sflag <= 1) \ 289 printf(m, ipstat.f, plural(ipstat.f)) 290 291 p(ips_total, "\t%u total packet%s received\n"); 292 p(ips_badsum, "\t%u bad header checksum%s\n"); 293 p(ips_toosmall, "\t%u with size smaller than minimum\n"); 294 p(ips_tooshort, "\t%u with data size < data length\n"); 295 p(ips_badhlen, "\t%u with header length < data size\n"); 296 p(ips_badlen, "\t%u with data length < header length\n"); 297 p(ips_badoptions, "\t%u with bad options\n"); 298 p(ips_badvers, "\t%u with incorrect version number\n"); 299 p(ips_fragments, "\t%u fragment%s received\n"); 300 p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n"); 301 p(ips_badfrags, "\t%u malformed fragment%s dropped\n"); 302 p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n"); 303 p(ips_reassembled, "\t%u packet%s reassembled ok\n"); 304 p(ips_delivered, "\t%u packet%s for this host\n"); 305 p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n"); 306 p(ips_forward, "\t%u packet%s forwarded\n"); 307 p(ips_cantforward, "\t%u packet%s not forwardable\n"); 308 p(ips_redirectsent, "\t%u redirect%s sent\n"); 309 p(ips_localout, "\t%u packet%s sent from this host\n"); 310 p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n"); 311 p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n"); 312 p(ips_noroute, "\t%u output packet%s discarded due to no route\n"); 313 p(ips_fragmented, "\t%u output datagram%s fragmented\n"); 314 p(ips_ofragments, "\t%u fragment%s created\n"); 315 p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n"); 316 #undef p 317 } 318 319 static char *icmpnames[] = { 320 "echo reply", 321 "#1", 322 "#2", 323 "destination unreachable", 324 "source quench", 325 "routing redirect", 326 "#6", 327 "#7", 328 "echo", 329 "#9", 330 "#10", 331 "time exceeded", 332 "parameter problem", 333 "time stamp", 334 "time stamp reply", 335 "information request", 336 "information request reply", 337 "address mask request", 338 "address mask reply", 339 }; 340 341 /* 342 * Dump ICMP statistics. 343 */ 344 void 345 icmp_stats(off, name) 346 u_long off; 347 char *name; 348 { 349 struct icmpstat icmpstat; 350 register int i, first; 351 352 if (off == 0) 353 return; 354 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 355 printf("%s:\n", name); 356 357 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 358 printf(m, icmpstat.f, plural(icmpstat.f)) 359 360 p(icps_error, "\t%u call%s to icmp_error\n"); 361 p(icps_oldicmp, 362 "\t%u error%s not generated 'cuz old message was icmp\n"); 363 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 364 if (icmpstat.icps_outhist[i] != 0) { 365 if (first) { 366 printf("\tOutput histogram:\n"); 367 first = 0; 368 } 369 printf("\t\t%s: %u\n", icmpnames[i], 370 icmpstat.icps_outhist[i]); 371 } 372 p(icps_badcode, "\t%u message%s with bad code fields\n"); 373 p(icps_tooshort, "\t%u message%s < minimum length\n"); 374 p(icps_checksum, "\t%u bad checksum%s\n"); 375 p(icps_badlen, "\t%u message%s with bad length\n"); 376 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 377 if (icmpstat.icps_inhist[i] != 0) { 378 if (first) { 379 printf("\tInput histogram:\n"); 380 first = 0; 381 } 382 printf("\t\t%s: %u\n", icmpnames[i], 383 icmpstat.icps_inhist[i]); 384 } 385 p(icps_reflect, "\t%u message response%s generated\n"); 386 #undef p 387 } 388 389 /* 390 * Dump IGMP statistics structure. 391 */ 392 void 393 igmp_stats(off, name) 394 u_long off; 395 char *name; 396 { 397 struct igmpstat igmpstat; 398 399 if (off == 0) 400 return; 401 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 402 printf("%s:\n", name); 403 404 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 405 printf(m, igmpstat.f, plural(igmpstat.f)) 406 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 407 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 408 p(igps_rcv_total, "\t%u message%s received\n"); 409 p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n"); 410 p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n"); 411 py(igps_rcv_queries, "\t%u membership quer%s received\n"); 412 py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n"); 413 p(igps_rcv_reports, "\t%u membership report%s received\n"); 414 p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n"); 415 p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n"); 416 p(igps_snd_reports, "\t%u membership report%s sent\n"); 417 #undef p 418 #undef py 419 } 420 421 /* 422 * Pretty print an Internet address (net address + port). 423 * If the nflag was specified, use numbers instead of names. 424 */ 425 void 426 inetprint(in, port, proto) 427 register struct in_addr *in; 428 int port; 429 char *proto; 430 { 431 struct servent *sp = 0; 432 char line[80], *cp; 433 int width; 434 435 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 436 cp = index(line, '\0'); 437 if (!nflag && port) 438 sp = getservbyport((int)port, proto); 439 if (sp || port == 0) 440 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 441 else 442 sprintf(cp, "%d", ntohs((u_short)port)); 443 width = Aflag ? 18 : 22; 444 printf(" %-*.*s", width, width, line); 445 } 446 447 /* 448 * Construct an Internet address representation. 449 * If the nflag has been supplied, give 450 * numeric value, otherwise try for symbolic name. 451 */ 452 char * 453 inetname(inp) 454 struct in_addr *inp; 455 { 456 register char *cp; 457 static char line[50]; 458 struct hostent *hp; 459 struct netent *np; 460 static char domain[MAXHOSTNAMELEN + 1]; 461 static int first = 1; 462 463 if (first && !nflag) { 464 first = 0; 465 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 466 (cp = index(domain, '.'))) 467 (void) strcpy(domain, cp + 1); 468 else 469 domain[0] = 0; 470 } 471 cp = 0; 472 if (!nflag && inp->s_addr != INADDR_ANY) { 473 int net = inet_netof(*inp); 474 int lna = inet_lnaof(*inp); 475 476 if (lna == INADDR_ANY) { 477 np = getnetbyaddr(net, AF_INET); 478 if (np) 479 cp = np->n_name; 480 } 481 if (cp == 0) { 482 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 483 if (hp) { 484 if ((cp = index(hp->h_name, '.')) && 485 !strcmp(cp + 1, domain)) 486 *cp = 0; 487 cp = hp->h_name; 488 } 489 } 490 } 491 if (inp->s_addr == INADDR_ANY) 492 strcpy(line, "*"); 493 else if (cp) 494 strcpy(line, cp); 495 else { 496 inp->s_addr = ntohl(inp->s_addr); 497 #define C(x) ((x) & 0xff) 498 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 499 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 500 } 501 return (line); 502 } 503
Indexes created Mon Sep 22 10:09:38 GMT 2025