inet.c revision 1.13
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 1.13 1995/06/19 00:13:05 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 inpcbtable table; 92 register struct inpcb *head, *next, *prev; 93 struct inpcb inpcb; 94 int istcp; 95 static int first = 1; 96 97 if (off == 0) 98 return; 99 istcp = strcmp(name, "tcp") == 0; 100 kread(off, (char *)&table, sizeof table); 101 prev = head = 102 (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue.cqh_first; 103 next = table.inpt_queue.cqh_first; 104 105 while (next != head) { 106 kread((u_long)next, (char *)&inpcb, sizeof inpcb); 107 if (inpcb.inp_queue.cqe_prev != prev) { 108 printf("???\n"); 109 break; 110 } 111 prev = next; 112 next = inpcb.inp_queue.cqe_next; 113 114 if (!aflag && 115 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 116 continue; 117 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 118 if (istcp) { 119 kread((u_long)inpcb.inp_ppcb, 120 (char *)&tcpcb, sizeof (tcpcb)); 121 } 122 if (first) { 123 printf("Active Internet connections"); 124 if (aflag) 125 printf(" (including servers)"); 126 putchar('\n'); 127 if (Aflag) 128 printf("%-8.8s ", "PCB"); 129 printf(Aflag ? 130 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 131 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 132 "Proto", "Recv-Q", "Send-Q", 133 "Local Address", "Foreign Address", "(state)"); 134 first = 0; 135 } 136 if (Aflag) 137 if (istcp) 138 printf("%8x ", inpcb.inp_ppcb); 139 else 140 printf("%8x ", prev); 141 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 142 sockb.so_snd.sb_cc); 143 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); 144 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); 145 if (istcp) { 146 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 147 printf(" %d", tcpcb.t_state); 148 else 149 printf(" %s", tcpstates[tcpcb.t_state]); 150 } 151 putchar('\n'); 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_badfrags, "\t%u malformed fragment%s dropped\n"); 297 p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n"); 298 p(ips_reassembled, "\t%u packet%s reassembled ok\n"); 299 p(ips_delivered, "\t%u packet%s for this host\n"); 300 p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n"); 301 p(ips_forward, "\t%u packet%s forwarded\n"); 302 p(ips_cantforward, "\t%u packet%s not forwardable\n"); 303 p(ips_redirectsent, "\t%u redirect%s sent\n"); 304 p(ips_localout, "\t%u packet%s sent from this host\n"); 305 p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n"); 306 p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n"); 307 p(ips_noroute, "\t%u output packet%s discarded due to no route\n"); 308 p(ips_fragmented, "\t%u output datagram%s fragmented\n"); 309 p(ips_ofragments, "\t%u fragment%s created\n"); 310 p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n"); 311 #undef p 312 } 313 314 static char *icmpnames[] = { 315 "echo reply", 316 "#1", 317 "#2", 318 "destination unreachable", 319 "source quench", 320 "routing redirect", 321 "#6", 322 "#7", 323 "echo", 324 "#9", 325 "#10", 326 "time exceeded", 327 "parameter problem", 328 "time stamp", 329 "time stamp reply", 330 "information request", 331 "information request reply", 332 "address mask request", 333 "address mask reply", 334 }; 335 336 /* 337 * Dump ICMP statistics. 338 */ 339 void 340 icmp_stats(off, name) 341 u_long off; 342 char *name; 343 { 344 struct icmpstat icmpstat; 345 register int i, first; 346 347 if (off == 0) 348 return; 349 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 350 printf("%s:\n", name); 351 352 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 353 printf(m, icmpstat.f, plural(icmpstat.f)) 354 355 p(icps_error, "\t%u call%s to icmp_error\n"); 356 p(icps_oldicmp, 357 "\t%u error%s not generated 'cuz old message was icmp\n"); 358 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 359 if (icmpstat.icps_outhist[i] != 0) { 360 if (first) { 361 printf("\tOutput histogram:\n"); 362 first = 0; 363 } 364 printf("\t\t%s: %u\n", icmpnames[i], 365 icmpstat.icps_outhist[i]); 366 } 367 p(icps_badcode, "\t%u message%s with bad code fields\n"); 368 p(icps_tooshort, "\t%u message%s < minimum length\n"); 369 p(icps_checksum, "\t%u bad checksum%s\n"); 370 p(icps_badlen, "\t%u message%s with bad length\n"); 371 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 372 if (icmpstat.icps_inhist[i] != 0) { 373 if (first) { 374 printf("\tInput histogram:\n"); 375 first = 0; 376 } 377 printf("\t\t%s: %u\n", icmpnames[i], 378 icmpstat.icps_inhist[i]); 379 } 380 p(icps_reflect, "\t%u message response%s generated\n"); 381 #undef p 382 } 383 384 /* 385 * Dump IGMP statistics structure. 386 */ 387 void 388 igmp_stats(off, name) 389 u_long off; 390 char *name; 391 { 392 struct igmpstat igmpstat; 393 394 if (off == 0) 395 return; 396 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 397 printf("%s:\n", name); 398 399 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 400 printf(m, igmpstat.f, plural(igmpstat.f)) 401 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 402 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 403 p(igps_rcv_total, "\t%u message%s received\n"); 404 p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n"); 405 p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n"); 406 py(igps_rcv_queries, "\t%u membership quer%s received\n"); 407 py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n"); 408 p(igps_rcv_reports, "\t%u membership report%s received\n"); 409 p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n"); 410 p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n"); 411 p(igps_snd_reports, "\t%u membership report%s sent\n"); 412 #undef p 413 #undef py 414 } 415 416 /* 417 * Pretty print an Internet address (net address + port). 418 * If the nflag was specified, use numbers instead of names. 419 */ 420 void 421 inetprint(in, port, proto) 422 register struct in_addr *in; 423 int port; 424 char *proto; 425 { 426 struct servent *sp = 0; 427 char line[80], *cp; 428 int width; 429 430 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 431 cp = index(line, '\0'); 432 if (!nflag && port) 433 sp = getservbyport((int)port, proto); 434 if (sp || port == 0) 435 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 436 else 437 sprintf(cp, "%d", ntohs((u_short)port)); 438 width = Aflag ? 18 : 22; 439 printf(" %-*.*s", width, width, line); 440 } 441 442 /* 443 * Construct an Internet address representation. 444 * If the nflag has been supplied, give 445 * numeric value, otherwise try for symbolic name. 446 */ 447 char * 448 inetname(inp) 449 struct in_addr *inp; 450 { 451 register char *cp; 452 static char line[50]; 453 struct hostent *hp; 454 struct netent *np; 455 static char domain[MAXHOSTNAMELEN + 1]; 456 static int first = 1; 457 458 if (first && !nflag) { 459 first = 0; 460 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 461 (cp = index(domain, '.'))) 462 (void) strcpy(domain, cp + 1); 463 else 464 domain[0] = 0; 465 } 466 cp = 0; 467 if (!nflag && inp->s_addr != INADDR_ANY) { 468 int net = inet_netof(*inp); 469 int lna = inet_lnaof(*inp); 470 471 if (lna == INADDR_ANY) { 472 np = getnetbyaddr(net, AF_INET); 473 if (np) 474 cp = np->n_name; 475 } 476 if (cp == 0) { 477 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 478 if (hp) { 479 if ((cp = index(hp->h_name, '.')) && 480 !strcmp(cp + 1, domain)) 481 *cp = 0; 482 cp = hp->h_name; 483 } 484 } 485 } 486 if (inp->s_addr == INADDR_ANY) 487 strcpy(line, "*"); 488 else if (cp) 489 strcpy(line, cp); 490 else { 491 inp->s_addr = ntohl(inp->s_addr); 492 #define C(x) ((x) & 0xff) 493 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 494 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 495 } 496 return (line); 497 } 498
Indexes created Tue Sep 23 02:09:52 GMT 2025