inet.c revision 1.12
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 1.12 1995/06/12 03:03:10 mycroft 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 *next, **prev; 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 *)&table, sizeof table); 100 prev = &((struct inpcbtable *)off)->inpt_list.lh_first; 101 while (inpcb.inp_list.le_next != 0) { 102 next = inpcb.inp_list.le_next; 103 kread((u_long)next, (char *)&inpcb, sizeof inpcb); 104 if (inpcb.inp_list.le_prev != prev) { 105 printf("???\n"); 106 break; 107 } 108 prev = &next->inp_list.le_next; 109 if (!aflag && 110 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 111 continue; 112 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 113 if (istcp) { 114 kread((u_long)inpcb.inp_ppcb, 115 (char *)&tcpcb, sizeof (tcpcb)); 116 } 117 if (first) { 118 printf("Active Internet connections"); 119 if (aflag) 120 printf(" (including servers)"); 121 putchar('\n'); 122 if (Aflag) 123 printf("%-8.8s ", "PCB"); 124 printf(Aflag ? 125 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 126 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 127 "Proto", "Recv-Q", "Send-Q", 128 "Local Address", "Foreign Address", "(state)"); 129 first = 0; 130 } 131 if (Aflag) 132 if (istcp) 133 printf("%8x ", inpcb.inp_ppcb); 134 else 135 printf("%8x ", next); 136 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 137 sockb.so_snd.sb_cc); 138 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); 139 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); 140 if (istcp) { 141 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 142 printf(" %d", tcpcb.t_state); 143 else 144 printf(" %s", tcpstates[tcpcb.t_state]); 145 } 146 putchar('\n'); 147 } 148 } 149 150 /* 151 * Dump TCP statistics structure. 152 */ 153 void 154 tcp_stats(off, name) 155 u_long off; 156 char *name; 157 { 158 struct tcpstat tcpstat; 159 160 if (off == 0) 161 return; 162 printf ("%s:\n", name); 163 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 164 165 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 166 printf(m, tcpstat.f, plural(tcpstat.f)) 167 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 168 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 169 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 170 printf(m, tcpstat.f, plurales(tcpstat.f)) 171 172 p(tcps_sndtotal, "\t%d packet%s sent\n"); 173 p2(tcps_sndpack,tcps_sndbyte, 174 "\t\t%d data packet%s (%d byte%s)\n"); 175 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 176 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 177 p2(tcps_sndacks, tcps_delack, 178 "\t\t%d ack-only packet%s (%d delayed)\n"); 179 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 180 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 181 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 182 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 183 p(tcps_rcvtotal, "\t%d packet%s received\n"); 184 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 185 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 186 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 187 p2(tcps_rcvpack, tcps_rcvbyte, 188 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 189 p2(tcps_rcvduppack, tcps_rcvdupbyte, 190 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 191 p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n"); 192 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 193 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 194 p2(tcps_rcvoopack, tcps_rcvoobyte, 195 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 196 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 197 "\t\t%d packet%s (%d byte%s) of data after window\n"); 198 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 199 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 200 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 201 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 202 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 203 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 204 p(tcps_connattempt, "\t%d connection request%s\n"); 205 p(tcps_accepts, "\t%d connection accept%s\n"); 206 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 207 p2(tcps_closed, tcps_drops, 208 "\t%d connection%s closed (including %d drop%s)\n"); 209 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 210 p2(tcps_rttupdated, tcps_segstimed, 211 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 212 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 213 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 214 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 215 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 216 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 217 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 218 p(tcps_predack, "\t%d correct ACK header prediction%s\n"); 219 p(tcps_preddat, "\t%d correct data packet header prediction%s\n"); 220 p3(tcps_pcbcachemiss, "\t%d PCB cache miss%s\n"); 221 #undef p 222 #undef p2 223 #undef p3 224 } 225 226 /* 227 * Dump UDP statistics structure. 228 */ 229 void 230 udp_stats(off, name) 231 u_long off; 232 char *name; 233 { 234 struct udpstat udpstat; 235 u_long delivered; 236 237 if (off == 0) 238 return; 239 kread(off, (char *)&udpstat, sizeof (udpstat)); 240 printf("%s:\n", name); 241 #define p(f, m) if (udpstat.f || sflag <= 1) \ 242 printf(m, udpstat.f, plural(udpstat.f)) 243 p(udps_ipackets, "\t%u datagram%s received\n"); 244 p(udps_hdrops, "\t%u with incomplete header\n"); 245 p(udps_badlen, "\t%u with bad data length field\n"); 246 p(udps_badsum, "\t%u with bad checksum\n"); 247 p(udps_noport, "\t%u dropped due to no socket\n"); 248 p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n"); 249 p(udps_fullsock, "\t%u dropped due to full socket buffers\n"); 250 delivered = udpstat.udps_ipackets - 251 udpstat.udps_hdrops - 252 udpstat.udps_badlen - 253 udpstat.udps_badsum - 254 udpstat.udps_noport - 255 udpstat.udps_noportbcast - 256 udpstat.udps_fullsock; 257 if (delivered || sflag <= 1) 258 printf("\t%u delivered\n", delivered); 259 p(udps_opackets, "\t%u datagram%s output\n"); 260 #undef p 261 } 262 263 /* 264 * Dump IP statistics structure. 265 */ 266 void 267 ip_stats(off, name) 268 u_long off; 269 char *name; 270 { 271 struct ipstat ipstat; 272 273 if (off == 0) 274 return; 275 kread(off, (char *)&ipstat, sizeof (ipstat)); 276 printf("%s:\n", name); 277 278 #define p(f, m) if (ipstat.f || sflag <= 1) \ 279 printf(m, ipstat.f, plural(ipstat.f)) 280 281 p(ips_total, "\t%u total packet%s received\n"); 282 p(ips_badsum, "\t%u bad header checksum%s\n"); 283 p(ips_toosmall, "\t%u with size smaller than minimum\n"); 284 p(ips_tooshort, "\t%u with data size < data length\n"); 285 p(ips_badhlen, "\t%u with header length < data size\n"); 286 p(ips_badlen, "\t%u with data length < header length\n"); 287 p(ips_badoptions, "\t%u with bad options\n"); 288 p(ips_badvers, "\t%u with incorrect version number\n"); 289 p(ips_fragments, "\t%u fragment%s received\n"); 290 p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n"); 291 p(ips_badfrags, "\t%u malformed fragment%s dropped\n"); 292 p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n"); 293 p(ips_reassembled, "\t%u packet%s reassembled ok\n"); 294 p(ips_delivered, "\t%u packet%s for this host\n"); 295 p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n"); 296 p(ips_forward, "\t%u packet%s forwarded\n"); 297 p(ips_cantforward, "\t%u packet%s not forwardable\n"); 298 p(ips_redirectsent, "\t%u redirect%s sent\n"); 299 p(ips_localout, "\t%u packet%s sent from this host\n"); 300 p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n"); 301 p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n"); 302 p(ips_noroute, "\t%u output packet%s discarded due to no route\n"); 303 p(ips_fragmented, "\t%u output datagram%s fragmented\n"); 304 p(ips_ofragments, "\t%u fragment%s created\n"); 305 p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n"); 306 #undef p 307 } 308 309 static char *icmpnames[] = { 310 "echo reply", 311 "#1", 312 "#2", 313 "destination unreachable", 314 "source quench", 315 "routing redirect", 316 "#6", 317 "#7", 318 "echo", 319 "#9", 320 "#10", 321 "time exceeded", 322 "parameter problem", 323 "time stamp", 324 "time stamp reply", 325 "information request", 326 "information request reply", 327 "address mask request", 328 "address mask reply", 329 }; 330 331 /* 332 * Dump ICMP statistics. 333 */ 334 void 335 icmp_stats(off, name) 336 u_long off; 337 char *name; 338 { 339 struct icmpstat icmpstat; 340 register int i, first; 341 342 if (off == 0) 343 return; 344 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 345 printf("%s:\n", name); 346 347 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 348 printf(m, icmpstat.f, plural(icmpstat.f)) 349 350 p(icps_error, "\t%u call%s to icmp_error\n"); 351 p(icps_oldicmp, 352 "\t%u error%s not generated 'cuz old message was icmp\n"); 353 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 354 if (icmpstat.icps_outhist[i] != 0) { 355 if (first) { 356 printf("\tOutput histogram:\n"); 357 first = 0; 358 } 359 printf("\t\t%s: %u\n", icmpnames[i], 360 icmpstat.icps_outhist[i]); 361 } 362 p(icps_badcode, "\t%u message%s with bad code fields\n"); 363 p(icps_tooshort, "\t%u message%s < minimum length\n"); 364 p(icps_checksum, "\t%u bad checksum%s\n"); 365 p(icps_badlen, "\t%u message%s with bad length\n"); 366 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 367 if (icmpstat.icps_inhist[i] != 0) { 368 if (first) { 369 printf("\tInput histogram:\n"); 370 first = 0; 371 } 372 printf("\t\t%s: %u\n", icmpnames[i], 373 icmpstat.icps_inhist[i]); 374 } 375 p(icps_reflect, "\t%u message response%s generated\n"); 376 #undef p 377 } 378 379 /* 380 * Dump IGMP statistics structure. 381 */ 382 void 383 igmp_stats(off, name) 384 u_long off; 385 char *name; 386 { 387 struct igmpstat igmpstat; 388 389 if (off == 0) 390 return; 391 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 392 printf("%s:\n", name); 393 394 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 395 printf(m, igmpstat.f, plural(igmpstat.f)) 396 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 397 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 398 p(igps_rcv_total, "\t%u message%s received\n"); 399 p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n"); 400 p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n"); 401 py(igps_rcv_queries, "\t%u membership quer%s received\n"); 402 py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n"); 403 p(igps_rcv_reports, "\t%u membership report%s received\n"); 404 p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n"); 405 p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n"); 406 p(igps_snd_reports, "\t%u membership report%s sent\n"); 407 #undef p 408 #undef py 409 } 410 411 /* 412 * Pretty print an Internet address (net address + port). 413 * If the nflag was specified, use numbers instead of names. 414 */ 415 void 416 inetprint(in, port, proto) 417 register struct in_addr *in; 418 int port; 419 char *proto; 420 { 421 struct servent *sp = 0; 422 char line[80], *cp; 423 int width; 424 425 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 426 cp = index(line, '\0'); 427 if (!nflag && port) 428 sp = getservbyport((int)port, proto); 429 if (sp || port == 0) 430 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 431 else 432 sprintf(cp, "%d", ntohs((u_short)port)); 433 width = Aflag ? 18 : 22; 434 printf(" %-*.*s", width, width, line); 435 } 436 437 /* 438 * Construct an Internet address representation. 439 * If the nflag has been supplied, give 440 * numeric value, otherwise try for symbolic name. 441 */ 442 char * 443 inetname(inp) 444 struct in_addr *inp; 445 { 446 register char *cp; 447 static char line[50]; 448 struct hostent *hp; 449 struct netent *np; 450 static char domain[MAXHOSTNAMELEN + 1]; 451 static int first = 1; 452 453 if (first && !nflag) { 454 first = 0; 455 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 456 (cp = index(domain, '.'))) 457 (void) strcpy(domain, cp + 1); 458 else 459 domain[0] = 0; 460 } 461 cp = 0; 462 if (!nflag && inp->s_addr != INADDR_ANY) { 463 int net = inet_netof(*inp); 464 int lna = inet_lnaof(*inp); 465 466 if (lna == INADDR_ANY) { 467 np = getnetbyaddr(net, AF_INET); 468 if (np) 469 cp = np->n_name; 470 } 471 if (cp == 0) { 472 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 473 if (hp) { 474 if ((cp = index(hp->h_name, '.')) && 475 !strcmp(cp + 1, domain)) 476 *cp = 0; 477 cp = hp->h_name; 478 } 479 } 480 } 481 if (inp->s_addr == INADDR_ANY) 482 strcpy(line, "*"); 483 else if (cp) 484 strcpy(line, cp); 485 else { 486 inp->s_addr = ntohl(inp->s_addr); 487 #define C(x) ((x) & 0xff) 488 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 489 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 490 } 491 return (line); 492 } 493
Indexes created Tue Sep 23 22:09:46 GMT 2025