inet.c revision 1.1
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 static char sccsid[] = "@(#)inet.c 5.15 (Berkeley) 6/18/90"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 #include <sys/mbuf.h> 42 #include <sys/protosw.h> 43 44 #include <net/route.h> 45 #include <netinet/in.h> 46 #include <netinet/in_systm.h> 47 #include <netinet/ip.h> 48 #include <netinet/in_pcb.h> 49 #include <netinet/ip_icmp.h> 50 #include <netinet/icmp_var.h> 51 #include <netinet/ip_var.h> 52 #include <netinet/tcp.h> 53 #include <netinet/tcpip.h> 54 #include <netinet/tcp_seq.h> 55 #define TCPSTATES 56 #include <netinet/tcp_fsm.h> 57 #include <netinet/tcp_timer.h> 58 #include <netinet/tcp_var.h> 59 #include <netinet/tcp_debug.h> 60 #include <netinet/udp.h> 61 #include <netinet/udp_var.h> 62 63 #include <netdb.h> 64 65 #include <stdio.h> 66 #include <string.h> 67 68 struct inpcb inpcb; 69 struct tcpcb tcpcb; 70 struct socket sockb; 71 extern int Aflag; 72 extern int aflag; 73 extern int nflag; 74 extern char *plural(); 75 76 char *inetname(); 77 78 /* 79 * Print a summary of connections related to an Internet 80 * protocol. For TCP, also give state of connection. 81 * Listening processes (aflag) are suppressed unless the 82 * -a (all) flag is specified. 83 */ 84 protopr(off, name) 85 off_t off; 86 char *name; 87 { 88 struct inpcb cb; 89 register struct inpcb *prev, *next; 90 int istcp; 91 static int first = 1; 92 93 if (off == 0) 94 return; 95 istcp = strcmp(name, "tcp") == 0; 96 kvm_read(off, (char *)&cb, sizeof (struct inpcb)); 97 inpcb = cb; 98 prev = (struct inpcb *)off; 99 if (inpcb.inp_next == (struct inpcb *)off) 100 return; 101 while (inpcb.inp_next != (struct inpcb *)off) { 102 103 next = inpcb.inp_next; 104 kvm_read((off_t)next, (char *)&inpcb, sizeof (inpcb)); 105 if (inpcb.inp_prev != prev) { 106 printf("???\n"); 107 break; 108 } 109 if (!aflag && 110 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) { 111 prev = next; 112 continue; 113 } 114 kvm_read((off_t)inpcb.inp_socket, 115 (char *)&sockb, sizeof (sockb)); 116 if (istcp) { 117 kvm_read((off_t)inpcb.inp_ppcb, 118 (char *)&tcpcb, sizeof (tcpcb)); 119 } 120 if (first) { 121 printf("Active Internet connections"); 122 if (aflag) 123 printf(" (including servers)"); 124 putchar('\n'); 125 if (Aflag) 126 printf("%-8.8s ", "PCB"); 127 printf(Aflag ? 128 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 129 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 130 "Proto", "Recv-Q", "Send-Q", 131 "Local Address", "Foreign Address", "(state)"); 132 first = 0; 133 } 134 if (Aflag) 135 if (istcp) 136 printf("%8x ", inpcb.inp_ppcb); 137 else 138 printf("%8x ", next); 139 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 140 sockb.so_snd.sb_cc); 141 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name); 142 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name); 143 if (istcp) { 144 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 145 printf(" %d", tcpcb.t_state); 146 else 147 printf(" %s", tcpstates[tcpcb.t_state]); 148 } 149 putchar('\n'); 150 prev = next; 151 } 152 } 153 154 /* 155 * Dump TCP statistics structure. 156 */ 157 tcp_stats(off, name) 158 off_t off; 159 char *name; 160 { 161 struct tcpstat tcpstat; 162 163 if (off == 0) 164 return; 165 printf ("%s:\n", name); 166 kvm_read(off, (char *)&tcpstat, sizeof (tcpstat)); 167 168 #define p(f, m) printf(m, tcpstat.f, plural(tcpstat.f)) 169 #define p2(f1, f2, m) printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 170 171 p(tcps_sndtotal, "\t%d packet%s sent\n"); 172 p2(tcps_sndpack,tcps_sndbyte, 173 "\t\t%d data packet%s (%d byte%s)\n"); 174 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 175 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 176 p2(tcps_sndacks, tcps_delack, 177 "\t\t%d ack-only packet%s (%d delayed)\n"); 178 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 179 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 180 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 181 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 182 p(tcps_rcvtotal, "\t%d packet%s received\n"); 183 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 184 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 185 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 186 p2(tcps_rcvpack, tcps_rcvbyte, 187 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 188 p2(tcps_rcvduppack, tcps_rcvdupbyte, 189 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 190 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 191 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 192 p2(tcps_rcvoopack, tcps_rcvoobyte, 193 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 194 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 195 "\t\t%d packet%s (%d byte%s) of data after window\n"); 196 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 197 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 198 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 199 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 200 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 201 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 202 p(tcps_connattempt, "\t%d connection request%s\n"); 203 p(tcps_accepts, "\t%d connection accept%s\n"); 204 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 205 p2(tcps_closed, tcps_drops, 206 "\t%d connection%s closed (including %d drop%s)\n"); 207 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 208 p2(tcps_rttupdated, tcps_segstimed, 209 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 210 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 211 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 212 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 213 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 214 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 215 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 216 #undef p 217 #undef p2 218 } 219 220 /* 221 * Dump UDP statistics structure. 222 */ 223 udp_stats(off, name) 224 off_t off; 225 char *name; 226 { 227 struct udpstat udpstat; 228 229 if (off == 0) 230 return; 231 kvm_read(off, (char *)&udpstat, sizeof (udpstat)); 232 printf("%s:\n\t%u incomplete header%s\n", name, 233 udpstat.udps_hdrops, plural(udpstat.udps_hdrops)); 234 printf("\t%u bad data length field%s\n", 235 udpstat.udps_badlen, plural(udpstat.udps_badlen)); 236 printf("\t%u bad checksum%s\n", 237 udpstat.udps_badsum, plural(udpstat.udps_badsum)); 238 } 239 240 /* 241 * Dump IP statistics structure. 242 */ 243 ip_stats(off, name) 244 off_t off; 245 char *name; 246 { 247 struct ipstat ipstat; 248 249 if (off == 0) 250 return; 251 kvm_read(off, (char *)&ipstat, sizeof (ipstat)); 252 printf("%s:\n\t%u total packets received\n", name, 253 ipstat.ips_total); 254 printf("\t%u bad header checksum%s\n", 255 ipstat.ips_badsum, plural(ipstat.ips_badsum)); 256 printf("\t%u with size smaller than minimum\n", ipstat.ips_tooshort); 257 printf("\t%u with data size < data length\n", ipstat.ips_toosmall); 258 printf("\t%u with header length < data size\n", ipstat.ips_badhlen); 259 printf("\t%u with data length < header length\n", ipstat.ips_badlen); 260 printf("\t%u fragment%s received\n", 261 ipstat.ips_fragments, plural(ipstat.ips_fragments)); 262 printf("\t%u fragment%s dropped (dup or out of space)\n", 263 ipstat.ips_fragdropped, plural(ipstat.ips_fragdropped)); 264 printf("\t%u fragment%s dropped after timeout\n", 265 ipstat.ips_fragtimeout, plural(ipstat.ips_fragtimeout)); 266 printf("\t%u packet%s forwarded\n", 267 ipstat.ips_forward, plural(ipstat.ips_forward)); 268 printf("\t%u packet%s not forwardable\n", 269 ipstat.ips_cantforward, plural(ipstat.ips_cantforward)); 270 printf("\t%u redirect%s sent\n", 271 ipstat.ips_redirectsent, plural(ipstat.ips_redirectsent)); 272 } 273 274 static char *icmpnames[] = { 275 "echo reply", 276 "#1", 277 "#2", 278 "destination unreachable", 279 "source quench", 280 "routing redirect", 281 "#6", 282 "#7", 283 "echo", 284 "#9", 285 "#10", 286 "time exceeded", 287 "parameter problem", 288 "time stamp", 289 "time stamp reply", 290 "information request", 291 "information request reply", 292 "address mask request", 293 "address mask reply", 294 }; 295 296 /* 297 * Dump ICMP statistics. 298 */ 299 icmp_stats(off, name) 300 off_t off; 301 char *name; 302 { 303 struct icmpstat icmpstat; 304 register int i, first; 305 306 if (off == 0) 307 return; 308 kvm_read(off, (char *)&icmpstat, sizeof (icmpstat)); 309 printf("%s:\n\t%u call%s to icmp_error\n", name, 310 icmpstat.icps_error, plural(icmpstat.icps_error)); 311 printf("\t%u error%s not generated 'cuz old message was icmp\n", 312 icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp)); 313 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 314 if (icmpstat.icps_outhist[i] != 0) { 315 if (first) { 316 printf("\tOutput histogram:\n"); 317 first = 0; 318 } 319 printf("\t\t%s: %u\n", icmpnames[i], 320 icmpstat.icps_outhist[i]); 321 } 322 printf("\t%u message%s with bad code fields\n", 323 icmpstat.icps_badcode, plural(icmpstat.icps_badcode)); 324 printf("\t%u message%s < minimum length\n", 325 icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort)); 326 printf("\t%u bad checksum%s\n", 327 icmpstat.icps_checksum, plural(icmpstat.icps_checksum)); 328 printf("\t%u message%s with bad length\n", 329 icmpstat.icps_badlen, plural(icmpstat.icps_badlen)); 330 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 331 if (icmpstat.icps_inhist[i] != 0) { 332 if (first) { 333 printf("\tInput histogram:\n"); 334 first = 0; 335 } 336 printf("\t\t%s: %u\n", icmpnames[i], 337 icmpstat.icps_inhist[i]); 338 } 339 printf("\t%u message response%s generated\n", 340 icmpstat.icps_reflect, plural(icmpstat.icps_reflect)); 341 } 342 343 /* 344 * Pretty print an Internet address (net address + port). 345 * If the nflag was specified, use numbers instead of names. 346 */ 347 inetprint(in, port, proto) 348 register struct in_addr *in; 349 u_short port; 350 char *proto; 351 { 352 struct servent *sp = 0; 353 char line[80], *cp, *index(); 354 int width; 355 356 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(*in)); 357 cp = index(line, '\0'); 358 if (!nflag && port) 359 sp = getservbyport((int)port, proto); 360 if (sp || port == 0) 361 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 362 else 363 sprintf(cp, "%d", ntohs((u_short)port)); 364 width = Aflag ? 18 : 22; 365 printf(" %-*.*s", width, width, line); 366 } 367 368 /* 369 * Construct an Internet address representation. 370 * If the nflag has been supplied, give 371 * numeric value, otherwise try for symbolic name. 372 */ 373 char * 374 inetname(in) 375 struct in_addr in; 376 { 377 register char *cp; 378 static char line[50]; 379 struct hostent *hp; 380 struct netent *np; 381 static char domain[MAXHOSTNAMELEN + 1]; 382 static int first = 1; 383 384 if (first && !nflag) { 385 first = 0; 386 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 387 (cp = index(domain, '.'))) 388 (void) strcpy(domain, cp + 1); 389 else 390 domain[0] = 0; 391 } 392 cp = 0; 393 if (!nflag && in.s_addr != INADDR_ANY) { 394 int net = inet_netof(in); 395 int lna = inet_lnaof(in); 396 397 if (lna == INADDR_ANY) { 398 np = getnetbyaddr(net, AF_INET); 399 if (np) 400 cp = np->n_name; 401 } 402 if (cp == 0) { 403 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); 404 if (hp) { 405 if ((cp = index(hp->h_name, '.')) && 406 !strcmp(cp + 1, domain)) 407 *cp = 0; 408 cp = hp->h_name; 409 } 410 } 411 } 412 if (in.s_addr == INADDR_ANY) 413 strcpy(line, "*"); 414 else if (cp) 415 strcpy(line, cp); 416 else { 417 in.s_addr = ntohl(in.s_addr); 418 #define C(x) ((x) & 0xff) 419 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 420 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 421 } 422 return (line); 423 } 424
Indexes created Mon Sep 22 05:09:51 GMT 2025