inet.c revision 1.10
1 /* 2 * Copyright (c) 1983, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)inet.c 8.4 (Berkeley) 4/20/94";*/ 36 static char *rcsid = "$Id: inet.c,v 1.10 1994/12/24 17:21:51 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/param.h> 40 #include <sys/queue.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/mbuf.h> 44 #include <sys/protosw.h> 45 46 #include <net/route.h> 47 #include <netinet/in.h> 48 #include <netinet/in_systm.h> 49 #include <netinet/ip.h> 50 #include <netinet/in_pcb.h> 51 #include <netinet/ip_icmp.h> 52 #include <netinet/icmp_var.h> 53 #include <netinet/igmp_var.h> 54 #include <netinet/ip_var.h> 55 #include <netinet/tcp.h> 56 #include <netinet/tcpip.h> 57 #include <netinet/tcp_seq.h> 58 #define TCPSTATES 59 #include <netinet/tcp_fsm.h> 60 #include <netinet/tcp_timer.h> 61 #include <netinet/tcp_var.h> 62 #include <netinet/tcp_debug.h> 63 #include <netinet/udp.h> 64 #include <netinet/udp_var.h> 65 66 #include <arpa/inet.h> 67 #include <netdb.h> 68 #include <stdio.h> 69 #include <string.h> 70 #include <unistd.h> 71 #include "netstat.h" 72 73 struct inpcb inpcb; 74 struct tcpcb tcpcb; 75 struct socket sockb; 76 77 char *inetname __P((struct in_addr *)); 78 void inetprint __P((struct in_addr *, int, char *)); 79 80 /* 81 * Print a summary of connections related to an Internet 82 * protocol. For TCP, also give state of connection. 83 * Listening processes (aflag) are suppressed unless the 84 * -a (all) flag is specified. 85 */ 86 void 87 protopr(off, name) 88 u_long off; 89 char *name; 90 { 91 struct inpcb cb; 92 register struct inpcb *prev, *next; 93 int istcp; 94 static int first = 1; 95 96 if (off == 0) 97 return; 98 istcp = strcmp(name, "tcp") == 0; 99 kread(off, (char *)&cb, sizeof (struct inpcb)); 100 inpcb = cb; 101 prev = (struct inpcb *)off; 102 if (inpcb.inp_next == (struct inpcb *)off) 103 return; 104 while (inpcb.inp_next != (struct inpcb *)off) { 105 next = inpcb.inp_next; 106 kread((u_long)next, (char *)&inpcb, sizeof (inpcb)); 107 if (inpcb.inp_prev != prev) { 108 printf("???\n"); 109 break; 110 } 111 if (!aflag && 112 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) { 113 prev = next; 114 continue; 115 } 116 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 117 if (istcp) { 118 kread((u_long)inpcb.inp_ppcb, 119 (char *)&tcpcb, sizeof (tcpcb)); 120 } 121 if (first) { 122 printf("Active Internet connections"); 123 if (aflag) 124 printf(" (including servers)"); 125 putchar('\n'); 126 if (Aflag) 127 printf("%-8.8s ", "PCB"); 128 printf(Aflag ? 129 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 130 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 131 "Proto", "Recv-Q", "Send-Q", 132 "Local Address", "Foreign Address", "(state)"); 133 first = 0; 134 } 135 if (Aflag) 136 if (istcp) 137 printf("%8x ", inpcb.inp_ppcb); 138 else 139 printf("%8x ", next); 140 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 141 sockb.so_snd.sb_cc); 142 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); 143 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); 144 if (istcp) { 145 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 146 printf(" %d", tcpcb.t_state); 147 else 148 printf(" %s", tcpstates[tcpcb.t_state]); 149 } 150 putchar('\n'); 151 prev = next; 152 } 153 } 154 155 /* 156 * Dump TCP statistics structure. 157 */ 158 void 159 tcp_stats(off, name) 160 u_long off; 161 char *name; 162 { 163 struct tcpstat tcpstat; 164 165 if (off == 0) 166 return; 167 printf ("%s:\n", name); 168 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 169 170 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 171 printf(m, tcpstat.f, plural(tcpstat.f)) 172 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 173 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 174 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 175 printf(m, tcpstat.f, plurales(tcpstat.f)) 176 177 p(tcps_sndtotal, "\t%d packet%s sent\n"); 178 p2(tcps_sndpack,tcps_sndbyte, 179 "\t\t%d data packet%s (%d byte%s)\n"); 180 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 181 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 182 p2(tcps_sndacks, tcps_delack, 183 "\t\t%d ack-only packet%s (%d delayed)\n"); 184 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 185 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 186 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 187 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 188 p(tcps_rcvtotal, "\t%d packet%s received\n"); 189 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 190 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 191 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 192 p2(tcps_rcvpack, tcps_rcvbyte, 193 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 194 p2(tcps_rcvduppack, tcps_rcvdupbyte, 195 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 196 p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n"); 197 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 198 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 199 p2(tcps_rcvoopack, tcps_rcvoobyte, 200 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 201 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 202 "\t\t%d packet%s (%d byte%s) of data after window\n"); 203 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 204 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 205 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 206 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 207 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 208 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 209 p(tcps_connattempt, "\t%d connection request%s\n"); 210 p(tcps_accepts, "\t%d connection accept%s\n"); 211 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 212 p2(tcps_closed, tcps_drops, 213 "\t%d connection%s closed (including %d drop%s)\n"); 214 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 215 p2(tcps_rttupdated, tcps_segstimed, 216 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 217 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 218 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 219 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 220 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 221 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 222 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 223 p(tcps_predack, "\t%d correct ACK header prediction%s\n"); 224 p(tcps_preddat, "\t%d correct data packet header prediction%s\n"); 225 p3(tcps_pcbcachemiss, "\t%d PCB cache miss%s\n"); 226 #undef p 227 #undef p2 228 #undef p3 229 } 230 231 /* 232 * Dump UDP statistics structure. 233 */ 234 void 235 udp_stats(off, name) 236 u_long off; 237 char *name; 238 { 239 struct udpstat udpstat; 240 u_long delivered; 241 242 if (off == 0) 243 return; 244 kread(off, (char *)&udpstat, sizeof (udpstat)); 245 printf("%s:\n", name); 246 #define p(f, m) if (udpstat.f || sflag <= 1) \ 247 printf(m, udpstat.f, plural(udpstat.f)) 248 p(udps_ipackets, "\t%u datagram%s received\n"); 249 p(udps_hdrops, "\t%u with incomplete header\n"); 250 p(udps_badlen, "\t%u with bad data length field\n"); 251 p(udps_badsum, "\t%u with bad checksum\n"); 252 p(udps_noport, "\t%u dropped due to no socket\n"); 253 p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n"); 254 p(udps_fullsock, "\t%u dropped due to full socket buffers\n"); 255 delivered = udpstat.udps_ipackets - 256 udpstat.udps_hdrops - 257 udpstat.udps_badlen - 258 udpstat.udps_badsum - 259 udpstat.udps_noport - 260 udpstat.udps_noportbcast - 261 udpstat.udps_fullsock; 262 if (delivered || sflag <= 1) 263 printf("\t%u delivered\n", delivered); 264 p(udps_opackets, "\t%u datagram%s output\n"); 265 #undef p 266 } 267 268 /* 269 * Dump IP statistics structure. 270 */ 271 void 272 ip_stats(off, name) 273 u_long off; 274 char *name; 275 { 276 struct ipstat ipstat; 277 278 if (off == 0) 279 return; 280 kread(off, (char *)&ipstat, sizeof (ipstat)); 281 printf("%s:\n", name); 282 283 #define p(f, m) if (ipstat.f || sflag <= 1) \ 284 printf(m, ipstat.f, plural(ipstat.f)) 285 286 p(ips_total, "\t%u total packet%s received\n"); 287 p(ips_badsum, "\t%u bad header checksum%s\n"); 288 p(ips_toosmall, "\t%u with size smaller than minimum\n"); 289 p(ips_tooshort, "\t%u with data size < data length\n"); 290 p(ips_badhlen, "\t%u with header length < data size\n"); 291 p(ips_badlen, "\t%u with data length < header length\n"); 292 p(ips_badoptions, "\t%u with bad options\n"); 293 p(ips_badvers, "\t%u with incorrect version number\n"); 294 p(ips_fragments, "\t%u fragment%s received\n"); 295 p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n"); 296 p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n"); 297 p(ips_reassembled, "\t%u packet%s reassembled ok\n"); 298 p(ips_delivered, "\t%u packet%s for this host\n"); 299 p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n"); 300 p(ips_forward, "\t%u packet%s forwarded\n"); 301 p(ips_cantforward, "\t%u packet%s not forwardable\n"); 302 p(ips_redirectsent, "\t%u redirect%s sent\n"); 303 p(ips_localout, "\t%u packet%s sent from this host\n"); 304 p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n"); 305 p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n"); 306 p(ips_noroute, "\t%u output packet%s discarded due to no route\n"); 307 p(ips_fragmented, "\t%u output datagram%s fragmented\n"); 308 p(ips_ofragments, "\t%u fragment%s created\n"); 309 p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n"); 310 #undef p 311 } 312 313 static char *icmpnames[] = { 314 "echo reply", 315 "#1", 316 "#2", 317 "destination unreachable", 318 "source quench", 319 "routing redirect", 320 "#6", 321 "#7", 322 "echo", 323 "#9", 324 "#10", 325 "time exceeded", 326 "parameter problem", 327 "time stamp", 328 "time stamp reply", 329 "information request", 330 "information request reply", 331 "address mask request", 332 "address mask reply", 333 }; 334 335 /* 336 * Dump ICMP statistics. 337 */ 338 void 339 icmp_stats(off, name) 340 u_long off; 341 char *name; 342 { 343 struct icmpstat icmpstat; 344 register int i, first; 345 346 if (off == 0) 347 return; 348 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 349 printf("%s:\n", name); 350 351 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 352 printf(m, icmpstat.f, plural(icmpstat.f)) 353 354 p(icps_error, "\t%u call%s to icmp_error\n"); 355 p(icps_oldicmp, 356 "\t%u error%s not generated 'cuz old message was icmp\n"); 357 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 358 if (icmpstat.icps_outhist[i] != 0) { 359 if (first) { 360 printf("\tOutput histogram:\n"); 361 first = 0; 362 } 363 printf("\t\t%s: %u\n", icmpnames[i], 364 icmpstat.icps_outhist[i]); 365 } 366 p(icps_badcode, "\t%u message%s with bad code fields\n"); 367 p(icps_tooshort, "\t%u message%s < minimum length\n"); 368 p(icps_checksum, "\t%u bad checksum%s\n"); 369 p(icps_badlen, "\t%u message%s with bad length\n"); 370 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 371 if (icmpstat.icps_inhist[i] != 0) { 372 if (first) { 373 printf("\tInput histogram:\n"); 374 first = 0; 375 } 376 printf("\t\t%s: %u\n", icmpnames[i], 377 icmpstat.icps_inhist[i]); 378 } 379 p(icps_reflect, "\t%u message response%s generated\n"); 380 #undef p 381 } 382 383 /* 384 * Dump IGMP statistics structure. 385 */ 386 void 387 igmp_stats(off, name) 388 u_long off; 389 char *name; 390 { 391 struct igmpstat igmpstat; 392 393 if (off == 0) 394 return; 395 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 396 printf("%s:\n", name); 397 398 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 399 printf(m, igmpstat.f, plural(igmpstat.f)) 400 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 401 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 402 p(igps_rcv_total, "\t%u message%s received\n"); 403 p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n"); 404 p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n"); 405 py(igps_rcv_queries, "\t%u membership quer%s received\n"); 406 py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n"); 407 p(igps_rcv_reports, "\t%u membership report%s received\n"); 408 p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n"); 409 p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n"); 410 p(igps_snd_reports, "\t%u membership report%s sent\n"); 411 #undef p 412 #undef py 413 } 414 415 /* 416 * Pretty print an Internet address (net address + port). 417 * If the nflag was specified, use numbers instead of names. 418 */ 419 void 420 inetprint(in, port, proto) 421 register struct in_addr *in; 422 int port; 423 char *proto; 424 { 425 struct servent *sp = 0; 426 char line[80], *cp; 427 int width; 428 429 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 430 cp = index(line, '\0'); 431 if (!nflag && port) 432 sp = getservbyport((int)port, proto); 433 if (sp || port == 0) 434 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 435 else 436 sprintf(cp, "%d", ntohs((u_short)port)); 437 width = Aflag ? 18 : 22; 438 printf(" %-*.*s", width, width, line); 439 } 440 441 /* 442 * Construct an Internet address representation. 443 * If the nflag has been supplied, give 444 * numeric value, otherwise try for symbolic name. 445 */ 446 char * 447 inetname(inp) 448 struct in_addr *inp; 449 { 450 register char *cp; 451 static char line[50]; 452 struct hostent *hp; 453 struct netent *np; 454 static char domain[MAXHOSTNAMELEN + 1]; 455 static int first = 1; 456 457 if (first && !nflag) { 458 first = 0; 459 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 460 (cp = index(domain, '.'))) 461 (void) strcpy(domain, cp + 1); 462 else 463 domain[0] = 0; 464 } 465 cp = 0; 466 if (!nflag && inp->s_addr != INADDR_ANY) { 467 int net = inet_netof(*inp); 468 int lna = inet_lnaof(*inp); 469 470 if (lna == INADDR_ANY) { 471 np = getnetbyaddr(net, AF_INET); 472 if (np) 473 cp = np->n_name; 474 } 475 if (cp == 0) { 476 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 477 if (hp) { 478 if ((cp = index(hp->h_name, '.')) && 479 !strcmp(cp + 1, domain)) 480 *cp = 0; 481 cp = hp->h_name; 482 } 483 } 484 } 485 if (inp->s_addr == INADDR_ANY) 486 strcpy(line, "*"); 487 else if (cp) 488 strcpy(line, cp); 489 else { 490 inp->s_addr = ntohl(inp->s_addr); 491 #define C(x) ((x) & 0xff) 492 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 493 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 494 } 495 return (line); 496 } 497
Indexes created Sun Sep 21 20:09:37 GMT 2025