inet.c revision 1.8
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 #include <nlist.h> 70 #include <kvm.h> 71 72 struct inpcb inpcb; 73 struct tcpcb tcpcb; 74 struct socket sockb; 75 extern int Aflag; 76 extern int aflag; 77 extern int nflag; 78 extern char *plural(); 79 80 char *inetname(); 81 82 /* 83 * Print a summary of connections related to an Internet 84 * protocol. For TCP, also give state of connection. 85 * Listening processes (aflag) are suppressed unless the 86 * -a (all) flag is specified. 87 */ 88 protopr(off, name) 89 u_long off; 90 char *name; 91 { 92 struct inpcb cb; 93 register struct inpcb *prev, *next; 94 int istcp; 95 static int first = 1; 96 97 if (off == 0) 98 return; 99 istcp = strcmp(name, "tcp") == 0; 100 kvm_read((void *)(long)off, (char *)&cb, sizeof (struct inpcb)); 101 inpcb = cb; 102 prev = (struct inpcb *)(long)off; 103 if (inpcb.inp_next == (struct inpcb *)(long)off) 104 return; 105 while (inpcb.inp_next != (struct inpcb *)(long)off) { 106 107 next = inpcb.inp_next; 108 kvm_read(next, (char *)&inpcb, sizeof (inpcb)); 109 if (inpcb.inp_prev != prev) { 110 printf("???\n"); 111 break; 112 } 113 if (!aflag && 114 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) { 115 prev = next; 116 continue; 117 } 118 kvm_read(inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 119 if (istcp) { 120 kvm_read(inpcb.inp_ppcb, (char *)&tcpcb, 121 sizeof (tcpcb)); 122 } 123 if (first) { 124 printf("Active Internet connections"); 125 if (aflag) 126 printf(" (including servers)"); 127 putchar('\n'); 128 if (Aflag) 129 printf("%-8.8s ", "PCB"); 130 printf(Aflag ? 131 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 132 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 133 "Proto", "Recv-Q", "Send-Q", 134 "Local Address", "Foreign Address", "(state)"); 135 first = 0; 136 } 137 if (Aflag) 138 if (istcp) 139 printf("%8x ", inpcb.inp_ppcb); 140 else 141 printf("%8x ", next); 142 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 143 sockb.so_snd.sb_cc); 144 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name); 145 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name); 146 if (istcp) { 147 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 148 printf(" %d", tcpcb.t_state); 149 else 150 printf(" %s", tcpstates[tcpcb.t_state]); 151 } 152 putchar('\n'); 153 prev = next; 154 } 155 } 156 157 /* 158 * Dump TCP statistics structure. 159 */ 160 tcp_stats(off, name) 161 u_long off; 162 char *name; 163 { 164 struct tcpstat tcpstat; 165 166 if (off == 0) 167 return; 168 printf ("%s:\n", name); 169 kvm_read((void *)(long)off, (char *)&tcpstat, sizeof (tcpstat)); 170 171 #define p(f, m) printf(m, tcpstat.f, plural(tcpstat.f)) 172 #define p2(f1, f2, m) printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 173 174 p(tcps_sndtotal, "\t%d packet%s sent\n"); 175 p2(tcps_sndpack,tcps_sndbyte, 176 "\t\t%d data packet%s (%d byte%s)\n"); 177 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 178 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 179 p2(tcps_sndacks, tcps_delack, 180 "\t\t%d ack-only packet%s (%d delayed)\n"); 181 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 182 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 183 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 184 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 185 p(tcps_rcvtotal, "\t%d packet%s received\n"); 186 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 187 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 188 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 189 p2(tcps_rcvpack, tcps_rcvbyte, 190 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 191 p2(tcps_rcvduppack, tcps_rcvdupbyte, 192 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 193 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 194 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 195 p2(tcps_rcvoopack, tcps_rcvoobyte, 196 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 197 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 198 "\t\t%d packet%s (%d byte%s) of data after window\n"); 199 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 200 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 201 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 202 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 203 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 204 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 205 p(tcps_connattempt, "\t%d connection request%s\n"); 206 p(tcps_accepts, "\t%d connection accept%s\n"); 207 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 208 p2(tcps_closed, tcps_drops, 209 "\t%d connection%s closed (including %d drop%s)\n"); 210 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 211 p2(tcps_rttupdated, tcps_segstimed, 212 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 213 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 214 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 215 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 216 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 217 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 218 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 219 #undef p 220 #undef p2 221 } 222 223 /* 224 * Dump UDP statistics structure. 225 */ 226 udp_stats(off, name) 227 u_long off; 228 char *name; 229 { 230 struct udpstat udpstat; 231 232 if (off == 0) 233 return; 234 kvm_read((void *)(long)off, (char *)&udpstat, sizeof (udpstat)); 235 printf("%s:\n\t%u packet%s sent\n", name, 236 udpstat.udps_opackets, plural(udpstat.udps_opackets)); 237 printf("\t%u packet%s received\n", 238 udpstat.udps_ipackets, plural(udpstat.udps_ipackets)); 239 printf("\t%u incomplete header%s\n", 240 udpstat.udps_hdrops, plural(udpstat.udps_hdrops)); 241 printf("\t%u bad data length field%s\n", 242 udpstat.udps_badlen, plural(udpstat.udps_badlen)); 243 printf("\t%u bad checksum%s\n", 244 udpstat.udps_badsum, plural(udpstat.udps_badsum)); 245 printf("\t%u packet%s received on unbound ports\n", 246 udpstat.udps_noport, plural(udpstat.udps_noport)); 247 printf("\t%u packet%s received (arrived as bcast) on unbound ports\n", 248 udpstat.udps_noportbcast, plural(udpstat.udps_noportbcast)); 249 printf("\t%u packet%s dropped, socket full\n", 250 udpstat.udps_fullsock, plural(udpstat.udps_fullsock)); 251 printf("\t%u packet%s missed pcb cache\n", 252 udpstat.udpps_pcbcachemiss, plural(udpstat.udpps_pcbcachemiss)); 253 } 254 255 /* 256 * Dump IP statistics structure. 257 */ 258 ip_stats(off, name) 259 u_long off; 260 char *name; 261 { 262 struct ipstat ipstat; 263 264 if (off == 0) 265 return; 266 kvm_read((void *)(long)off, (char *)&ipstat, sizeof (ipstat)); 267 printf("%s:\n\t%u total packets received\n", name, 268 ipstat.ips_total); 269 printf("\t%u bad header checksum%s\n", 270 ipstat.ips_badsum, plural(ipstat.ips_badsum)); 271 printf("\t%u with size smaller than minimum\n", ipstat.ips_tooshort); 272 printf("\t%u with data size < data length\n", ipstat.ips_toosmall); 273 printf("\t%u with header length < data size\n", ipstat.ips_badhlen); 274 printf("\t%u with data length < header length\n", ipstat.ips_badlen); 275 printf("\t%u fragment%s received\n", 276 ipstat.ips_fragments, plural(ipstat.ips_fragments)); 277 printf("\t%u fragment%s dropped (dup or out of space)\n", 278 ipstat.ips_fragdropped, plural(ipstat.ips_fragdropped)); 279 printf("\t%u fragment%s dropped after timeout\n", 280 ipstat.ips_fragtimeout, plural(ipstat.ips_fragtimeout)); 281 printf("\t%u packet%s forwarded\n", 282 ipstat.ips_forward, plural(ipstat.ips_forward)); 283 printf("\t%u packet%s not forwardable\n", 284 ipstat.ips_cantforward, plural(ipstat.ips_cantforward)); 285 printf("\t%u redirect%s sent\n", 286 ipstat.ips_redirectsent, plural(ipstat.ips_redirectsent)); 287 } 288 289 static char *icmpnames[] = { 290 "echo reply", 291 "#1", 292 "#2", 293 "destination unreachable", 294 "source quench", 295 "routing redirect", 296 "#6", 297 "#7", 298 "echo", 299 "#9", 300 "#10", 301 "time exceeded", 302 "parameter problem", 303 "time stamp", 304 "time stamp reply", 305 "information request", 306 "information request reply", 307 "address mask request", 308 "address mask reply", 309 }; 310 311 /* 312 * Dump ICMP statistics. 313 */ 314 icmp_stats(off, name) 315 u_long off; 316 char *name; 317 { 318 struct icmpstat icmpstat; 319 register int i, first; 320 321 if (off == 0) 322 return; 323 kvm_read((void *)(long)off, (char *)&icmpstat, sizeof (icmpstat)); 324 printf("%s:\n\t%u call%s to icmp_error\n", name, 325 icmpstat.icps_error, plural(icmpstat.icps_error)); 326 printf("\t%u error%s not generated 'cuz old message was icmp\n", 327 icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp)); 328 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 329 if (icmpstat.icps_outhist[i] != 0) { 330 if (first) { 331 printf("\tOutput histogram:\n"); 332 first = 0; 333 } 334 printf("\t\t%s: %u\n", icmpnames[i], 335 icmpstat.icps_outhist[i]); 336 } 337 printf("\t%u message%s with bad code fields\n", 338 icmpstat.icps_badcode, plural(icmpstat.icps_badcode)); 339 printf("\t%u message%s < minimum length\n", 340 icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort)); 341 printf("\t%u bad checksum%s\n", 342 icmpstat.icps_checksum, plural(icmpstat.icps_checksum)); 343 printf("\t%u message%s with bad length\n", 344 icmpstat.icps_badlen, plural(icmpstat.icps_badlen)); 345 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 346 if (icmpstat.icps_inhist[i] != 0) { 347 if (first) { 348 printf("\tInput histogram:\n"); 349 first = 0; 350 } 351 printf("\t\t%s: %u\n", icmpnames[i], 352 icmpstat.icps_inhist[i]); 353 } 354 printf("\t%u message response%s generated\n", 355 icmpstat.icps_reflect, plural(icmpstat.icps_reflect)); 356 } 357 358 char* 359 pluraly(n) 360 { 361 return (n == 1? "y" : "ies"); 362 } 363 364 /* 365 * Dump IGMP statistics. 366 */ 367 void 368 igmp_stats(off, name) 369 u_long off; 370 char *name; 371 { 372 struct igmpstat igmpstat; 373 register int i, first; 374 375 if (off == 0) 376 return; 377 kvm_read((void *)(long)off, (char *)&igmpstat, sizeof (igmpstat)); 378 printf("%s:\n", name ); 379 printf("\t%u message%s received\n", 380 igmpstat.igps_rcv_total, plural(igmpstat.igps_rcv_total)); 381 printf("\t%u message%s received with too few bytes\n", 382 igmpstat.igps_rcv_tooshort, plural(igmpstat.igps_rcv_tooshort)); 383 printf("\t%u message%s received with bad checksum\n", 384 igmpstat.igps_rcv_badsum, plural(igmpstat.igps_rcv_badsum)); 385 printf("\t%u membership quer%s received\n", 386 igmpstat.igps_rcv_queries, pluraly(igmpstat.igps_rcv_queries)); 387 printf("\t%u membership quer%s received with invalid field(s)\n", 388 igmpstat.igps_rcv_badqueries, pluraly(igmpstat.igps_rcv_badqueries)); 389 printf("\t%u membership report%s received\n", 390 igmpstat.igps_rcv_reports, plural(igmpstat.igps_rcv_reports)); 391 printf("\t%u membership report%s received with invalid field(s)\n", 392 igmpstat.igps_rcv_badreports, plural(igmpstat.igps_rcv_badreports)); 393 printf("\t%u membership report%s received for groups to which we belong\n", 394 igmpstat.igps_rcv_ourreports, plural(igmpstat.igps_rcv_ourreports)); 395 printf("\t%u membership report%s sent\n", 396 igmpstat.igps_snd_reports, plural(igmpstat.igps_snd_reports)); 397 } 398 399 /* 400 * Pretty print an Internet address (net address + port). 401 * If the nflag was specified, use numbers instead of names. 402 */ 403 inetprint(in, port, proto) 404 register struct in_addr *in; 405 u_short port; 406 char *proto; 407 { 408 struct servent *sp = 0; 409 char line[80], *cp, *index(); 410 int width; 411 412 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(*in)); 413 cp = index(line, '\0'); 414 if (!nflag && port) 415 sp = getservbyport((int)port, proto); 416 if (sp || port == 0) 417 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 418 else 419 sprintf(cp, "%d", ntohs((u_short)port)); 420 width = Aflag ? 18 : 22; 421 printf(" %-*.*s", width, width, line); 422 } 423 424 /* 425 * Construct an Internet address representation. 426 * If the nflag has been supplied, give 427 * numeric value, otherwise try for symbolic name. 428 */ 429 char * 430 inetname(in) 431 struct in_addr in; 432 { 433 register char *cp; 434 static char line[50]; 435 struct hostent *hp; 436 struct netent *np; 437 static char domain[MAXHOSTNAMELEN + 1]; 438 static int first = 1; 439 440 if (first && !nflag) { 441 first = 0; 442 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 443 (cp = index(domain, '.'))) 444 (void) strcpy(domain, cp + 1); 445 else 446 domain[0] = 0; 447 } 448 cp = 0; 449 if (!nflag && in.s_addr != INADDR_ANY) { 450 int net = inet_netof(in); 451 int lna = inet_lnaof(in); 452 453 if (lna == INADDR_ANY) { 454 np = getnetbyaddr(net, AF_INET); 455 if (np) 456 cp = np->n_name; 457 } 458 if (cp == 0) { 459 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); 460 if (hp) { 461 if ((cp = index(hp->h_name, '.')) && 462 !strcmp(cp + 1, domain)) 463 *cp = 0; 464 cp = hp->h_name; 465 } 466 } 467 } 468 if (in.s_addr == INADDR_ANY) 469 strcpy(line, "*"); 470 else if (cp) 471 strcpy(line, cp); 472 else { 473 in.s_addr = ntohl(in.s_addr); 474 #define C(x) ((x) & 0xff) 475 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 476 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 477 } 478 return (line); 479 } 480
Indexes created Tue Sep 23 07:09:52 GMT 2025