inet.c revision 1.6
1 /* 2 * Copyright (c) 1983, 1988 Regents of the University of California. 3 * 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 /* from: static char sccsid[] = "@(#)inet.c 5.15 (Berkeley) 6/18/90"; */ 36 static char rcsid[] = "inet.c,v 1.4 1993/05/20 12:03:49 cgd Exp"; 37 #endif /* not lint */ 38 39 #include <sys/param.h> 40 #include <sys/socket.h> 41 #include <sys/socketvar.h> 42 #include <sys/mbuf.h> 43 #include <sys/protosw.h> 44 45 #include <net/route.h> 46 #include <netinet/in.h> 47 #include <netinet/in_systm.h> 48 #include <netinet/ip.h> 49 #include <netinet/in_pcb.h> 50 #include <netinet/ip_icmp.h> 51 #include <netinet/icmp_var.h> 52 #include <netinet/igmp_var.h> 53 #include <netinet/ip_var.h> 54 #include <netinet/tcp.h> 55 #include <netinet/tcpip.h> 56 #include <netinet/tcp_seq.h> 57 #define TCPSTATES 58 #include <netinet/tcp_fsm.h> 59 #include <netinet/tcp_timer.h> 60 #include <netinet/tcp_var.h> 61 #include <netinet/tcp_debug.h> 62 #include <netinet/udp.h> 63 #include <netinet/udp_var.h> 64 65 #include <netdb.h> 66 67 #include <stdio.h> 68 #include <string.h> 69 70 struct inpcb inpcb; 71 struct tcpcb tcpcb; 72 struct socket sockb; 73 extern int Aflag; 74 extern int aflag; 75 extern int nflag; 76 extern char *plural(); 77 78 char *inetname(); 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 protopr(off, name) 87 off_t off; 88 char *name; 89 { 90 struct inpcb cb; 91 register struct inpcb *prev, *next; 92 int istcp; 93 static int first = 1; 94 95 if (off == 0) 96 return; 97 istcp = strcmp(name, "tcp") == 0; 98 kvm_read(off, (char *)&cb, sizeof (struct inpcb)); 99 inpcb = cb; 100 prev = (struct inpcb *)off; 101 if (inpcb.inp_next == (struct inpcb *)off) 102 return; 103 while (inpcb.inp_next != (struct inpcb *)off) { 104 105 next = inpcb.inp_next; 106 kvm_read((off_t)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 kvm_read((off_t)inpcb.inp_socket, 117 (char *)&sockb, sizeof (sockb)); 118 if (istcp) { 119 kvm_read((off_t)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 ", next); 141 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 142 sockb.so_snd.sb_cc); 143 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name); 144 inetprint(&inpcb.inp_faddr, 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 prev = next; 153 } 154 } 155 156 /* 157 * Dump TCP statistics structure. 158 */ 159 tcp_stats(off, name) 160 off_t off; 161 char *name; 162 { 163 struct tcpstat tcpstat; 164 165 if (off == 0) 166 return; 167 printf ("%s:\n", name); 168 kvm_read(off, (char *)&tcpstat, sizeof (tcpstat)); 169 170 #define p(f, m) printf(m, tcpstat.f, plural(tcpstat.f)) 171 #define p2(f1, f2, m) printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 172 173 p(tcps_sndtotal, "\t%d packet%s sent\n"); 174 p2(tcps_sndpack,tcps_sndbyte, 175 "\t\t%d data packet%s (%d byte%s)\n"); 176 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 177 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 178 p2(tcps_sndacks, tcps_delack, 179 "\t\t%d ack-only packet%s (%d delayed)\n"); 180 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 181 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 182 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 183 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 184 p(tcps_rcvtotal, "\t%d packet%s received\n"); 185 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 186 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 187 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 188 p2(tcps_rcvpack, tcps_rcvbyte, 189 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 190 p2(tcps_rcvduppack, tcps_rcvdupbyte, 191 "\t\t%d completely duplicate packet%s (%d byte%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 #undef p 219 #undef p2 220 } 221 222 /* 223 * Dump UDP statistics structure. 224 */ 225 udp_stats(off, name) 226 off_t off; 227 char *name; 228 { 229 struct udpstat udpstat; 230 231 if (off == 0) 232 return; 233 kvm_read(off, (char *)&udpstat, sizeof (udpstat)); 234 printf("%s:\n\t%u packet%s sent\n", name, 235 udpstat.udps_opackets, plural(udpstat.udps_opackets)); 236 printf("\t%u packet%s received\n", 237 udpstat.udps_ipackets, plural(udpstat.udps_ipackets)); 238 printf("\t%u incomplete header%s\n", 239 udpstat.udps_hdrops, plural(udpstat.udps_hdrops)); 240 printf("\t%u bad data length field%s\n", 241 udpstat.udps_badlen, plural(udpstat.udps_badlen)); 242 printf("\t%u bad checksum%s\n", 243 udpstat.udps_badsum, plural(udpstat.udps_badsum)); 244 printf("\t%u packet%s received on unbound ports\n", 245 udpstat.udps_noport, plural(udpstat.udps_noport)); 246 printf("\t%u packet%s received (arrived as bcast) on unbound ports\n", 247 udpstat.udps_noportbcast, plural(udpstat.udps_noportbcast)); 248 printf("\t%u packet%s dropped, socket full\n", 249 udpstat.udps_fullsock, plural(udpstat.udps_fullsock)); 250 printf("\t%u packet%s missed pcb cache\n", 251 udpstat.udpps_pcbcachemiss, plural(udpstat.udpps_pcbcachemiss)); 252 } 253 254 /* 255 * Dump IP statistics structure. 256 */ 257 ip_stats(off, name) 258 off_t off; 259 char *name; 260 { 261 struct ipstat ipstat; 262 263 if (off == 0) 264 return; 265 kvm_read(off, (char *)&ipstat, sizeof (ipstat)); 266 printf("%s:\n\t%u total packets received\n", name, 267 ipstat.ips_total); 268 printf("\t%u bad header checksum%s\n", 269 ipstat.ips_badsum, plural(ipstat.ips_badsum)); 270 printf("\t%u with size smaller than minimum\n", ipstat.ips_tooshort); 271 printf("\t%u with data size < data length\n", ipstat.ips_toosmall); 272 printf("\t%u with header length < data size\n", ipstat.ips_badhlen); 273 printf("\t%u with data length < header length\n", ipstat.ips_badlen); 274 printf("\t%u fragment%s received\n", 275 ipstat.ips_fragments, plural(ipstat.ips_fragments)); 276 printf("\t%u fragment%s dropped (dup or out of space)\n", 277 ipstat.ips_fragdropped, plural(ipstat.ips_fragdropped)); 278 printf("\t%u fragment%s dropped after timeout\n", 279 ipstat.ips_fragtimeout, plural(ipstat.ips_fragtimeout)); 280 printf("\t%u packet%s forwarded\n", 281 ipstat.ips_forward, plural(ipstat.ips_forward)); 282 printf("\t%u packet%s not forwardable\n", 283 ipstat.ips_cantforward, plural(ipstat.ips_cantforward)); 284 printf("\t%u redirect%s sent\n", 285 ipstat.ips_redirectsent, plural(ipstat.ips_redirectsent)); 286 } 287 288 static char *icmpnames[] = { 289 "echo reply", 290 "#1", 291 "#2", 292 "destination unreachable", 293 "source quench", 294 "routing redirect", 295 "#6", 296 "#7", 297 "echo", 298 "#9", 299 "#10", 300 "time exceeded", 301 "parameter problem", 302 "time stamp", 303 "time stamp reply", 304 "information request", 305 "information request reply", 306 "address mask request", 307 "address mask reply", 308 }; 309 310 /* 311 * Dump ICMP statistics. 312 */ 313 icmp_stats(off, name) 314 off_t off; 315 char *name; 316 { 317 struct icmpstat icmpstat; 318 register int i, first; 319 320 if (off == 0) 321 return; 322 kvm_read(off, (char *)&icmpstat, sizeof (icmpstat)); 323 printf("%s:\n\t%u call%s to icmp_error\n", name, 324 icmpstat.icps_error, plural(icmpstat.icps_error)); 325 printf("\t%u error%s not generated 'cuz old message was icmp\n", 326 icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp)); 327 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 328 if (icmpstat.icps_outhist[i] != 0) { 329 if (first) { 330 printf("\tOutput histogram:\n"); 331 first = 0; 332 } 333 printf("\t\t%s: %u\n", icmpnames[i], 334 icmpstat.icps_outhist[i]); 335 } 336 printf("\t%u message%s with bad code fields\n", 337 icmpstat.icps_badcode, plural(icmpstat.icps_badcode)); 338 printf("\t%u message%s < minimum length\n", 339 icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort)); 340 printf("\t%u bad checksum%s\n", 341 icmpstat.icps_checksum, plural(icmpstat.icps_checksum)); 342 printf("\t%u message%s with bad length\n", 343 icmpstat.icps_badlen, plural(icmpstat.icps_badlen)); 344 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 345 if (icmpstat.icps_inhist[i] != 0) { 346 if (first) { 347 printf("\tInput histogram:\n"); 348 first = 0; 349 } 350 printf("\t\t%s: %u\n", icmpnames[i], 351 icmpstat.icps_inhist[i]); 352 } 353 printf("\t%u message response%s generated\n", 354 icmpstat.icps_reflect, plural(icmpstat.icps_reflect)); 355 } 356 357 char* 358 pluraly(n) 359 { 360 return (n == 1? "y" : "ies"); 361 } 362 363 /* 364 * Dump IGMP statistics. 365 */ 366 void 367 igmp_stats(off, name) 368 off_t off; 369 char *name; 370 { 371 struct igmpstat igmpstat; 372 register int i, first; 373 374 if (off == 0) 375 return; 376 kvm_read(off, (char *)&igmpstat, sizeof (igmpstat)); 377 printf("%s:\n", name ); 378 printf("\t%u message%s received\n", 379 igmpstat.igps_rcv_total, plural(igmpstat.igps_rcv_total)); 380 printf("\t%u message%s received with too few bytes\n", 381 igmpstat.igps_rcv_tooshort, plural(igmpstat.igps_rcv_tooshort)); 382 printf("\t%u message%s received with bad checksum\n", 383 igmpstat.igps_rcv_badsum, plural(igmpstat.igps_rcv_badsum)); 384 printf("\t%u membership quer%s received\n", 385 igmpstat.igps_rcv_queries, pluraly(igmpstat.igps_rcv_queries)); 386 printf("\t%u membership quer%s received with invalid field(s)\n", 387 igmpstat.igps_rcv_badqueries, pluraly(igmpstat.igps_rcv_badqueries)); 388 printf("\t%u membership report%s received\n", 389 igmpstat.igps_rcv_reports, plural(igmpstat.igps_rcv_reports)); 390 printf("\t%u membership report%s received with invalid field(s)\n", 391 igmpstat.igps_rcv_badreports, plural(igmpstat.igps_rcv_badreports)); 392 printf("\t%u membership report%s received for groups to which we belong\n", 393 igmpstat.igps_rcv_ourreports, plural(igmpstat.igps_rcv_ourreports)); 394 printf("\t%u membership report%s sent\n", 395 igmpstat.igps_snd_reports, plural(igmpstat.igps_snd_reports)); 396 } 397 398 /* 399 * Pretty print an Internet address (net address + port). 400 * If the nflag was specified, use numbers instead of names. 401 */ 402 inetprint(in, port, proto) 403 register struct in_addr *in; 404 u_short port; 405 char *proto; 406 { 407 struct servent *sp = 0; 408 char line[80], *cp, *index(); 409 int width; 410 411 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(*in)); 412 cp = index(line, '\0'); 413 if (!nflag && port) 414 sp = getservbyport((int)port, proto); 415 if (sp || port == 0) 416 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 417 else 418 sprintf(cp, "%d", ntohs((u_short)port)); 419 width = Aflag ? 18 : 22; 420 printf(" %-*.*s", width, width, line); 421 } 422 423 /* 424 * Construct an Internet address representation. 425 * If the nflag has been supplied, give 426 * numeric value, otherwise try for symbolic name. 427 */ 428 char * 429 inetname(in) 430 struct in_addr in; 431 { 432 register char *cp; 433 static char line[50]; 434 struct hostent *hp; 435 struct netent *np; 436 static char domain[MAXHOSTNAMELEN + 1]; 437 static int first = 1; 438 439 if (first && !nflag) { 440 first = 0; 441 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 442 (cp = index(domain, '.'))) 443 (void) strcpy(domain, cp + 1); 444 else 445 domain[0] = 0; 446 } 447 cp = 0; 448 if (!nflag && in.s_addr != INADDR_ANY) { 449 int net = inet_netof(in); 450 int lna = inet_lnaof(in); 451 452 if (lna == INADDR_ANY) { 453 np = getnetbyaddr(net, AF_INET); 454 if (np) 455 cp = np->n_name; 456 } 457 if (cp == 0) { 458 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); 459 if (hp) { 460 if ((cp = index(hp->h_name, '.')) && 461 !strcmp(cp + 1, domain)) 462 *cp = 0; 463 cp = hp->h_name; 464 } 465 } 466 } 467 if (in.s_addr == INADDR_ANY) 468 strcpy(line, "*"); 469 else if (cp) 470 strcpy(line, cp); 471 else { 472 in.s_addr = ntohl(in.s_addr); 473 #define C(x) ((x) & 0xff) 474 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 475 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 476 } 477 return (line); 478 } 479
Indexes created Tue Sep 23 14:10:03 GMT 2025