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 are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)inet.c 5.12 (Berkeley) 04/07/90"; 20 #endif /* not lint */ 21 22 #include <strings.h> 23 #include <stdio.h> 24 25 #include <sys/param.h> 26 #include <sys/socket.h> 27 #include <sys/socketvar.h> 28 #include <sys/mbuf.h> 29 #include <sys/protosw.h> 30 31 #include <net/route.h> 32 #include <netinet/in.h> 33 #include <netinet/in_systm.h> 34 #include <netinet/ip.h> 35 #include <netinet/in_pcb.h> 36 #include <netinet/ip_icmp.h> 37 #include <netinet/icmp_var.h> 38 #include <netinet/ip_var.h> 39 #include <netinet/tcp.h> 40 #include <netinet/tcpip.h> 41 #include <netinet/tcp_seq.h> 42 #define TCPSTATES 43 #include <netinet/tcp_fsm.h> 44 #include <netinet/tcp_timer.h> 45 #include <netinet/tcp_var.h> 46 #include <netinet/tcp_debug.h> 47 #include <netinet/udp.h> 48 #include <netinet/udp_var.h> 49 50 #include <netdb.h> 51 52 struct inpcb inpcb; 53 struct tcpcb tcpcb; 54 struct socket sockb; 55 extern int kmem; 56 extern int Aflag; 57 extern int aflag; 58 extern int nflag; 59 extern char *plural(); 60 61 char *inetname(); 62 63 /* 64 * Print a summary of connections related to an Internet 65 * protocol. For TCP, also give state of connection. 66 * Listening processes (aflag) are suppressed unless the 67 * -a (all) flag is specified. 68 */ 69 protopr(off, name) 70 off_t off; 71 char *name; 72 { 73 struct inpcb cb; 74 register struct inpcb *prev, *next; 75 int istcp; 76 static int first = 1; 77 78 if (off == 0) 79 return; 80 istcp = strcmp(name, "tcp") == 0; 81 klseek(kmem, off, 0); 82 read(kmem, (char *)&cb, sizeof (struct inpcb)); 83 inpcb = cb; 84 prev = (struct inpcb *)off; 85 if (inpcb.inp_next == (struct inpcb *)off) 86 return; 87 while (inpcb.inp_next != (struct inpcb *)off) { 88 89 next = inpcb.inp_next; 90 klseek(kmem, (off_t)next, 0); 91 read(kmem, (char *)&inpcb, sizeof (inpcb)); 92 if (inpcb.inp_prev != prev) { 93 printf("???\n"); 94 break; 95 } 96 if (!aflag && 97 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) { 98 prev = next; 99 continue; 100 } 101 klseek(kmem, (off_t)inpcb.inp_socket, 0); 102 read(kmem, (char *)&sockb, sizeof (sockb)); 103 if (istcp) { 104 klseek(kmem, (off_t)inpcb.inp_ppcb, 0); 105 read(kmem, (char *)&tcpcb, sizeof (tcpcb)); 106 } 107 if (first) { 108 printf("Active Internet connections"); 109 if (aflag) 110 printf(" (including servers)"); 111 putchar('\n'); 112 if (Aflag) 113 printf("%-8.8s ", "PCB"); 114 printf(Aflag ? 115 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 116 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 117 "Proto", "Recv-Q", "Send-Q", 118 "Local Address", "Foreign Address", "(state)"); 119 first = 0; 120 } 121 if (Aflag) 122 if (istcp) 123 printf("%8x ", inpcb.inp_ppcb); 124 else 125 printf("%8x ", next); 126 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 127 sockb.so_snd.sb_cc); 128 inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name); 129 inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name); 130 if (istcp) { 131 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 132 printf(" %d", tcpcb.t_state); 133 else 134 printf(" %s", tcpstates[tcpcb.t_state]); 135 } 136 putchar('\n'); 137 prev = next; 138 } 139 } 140 141 /* 142 * Dump TCP statistics structure. 143 */ 144 tcp_stats(off, name) 145 off_t off; 146 char *name; 147 { 148 struct tcpstat tcpstat; 149 150 if (off == 0) 151 return; 152 printf ("%s:\n", name); 153 klseek(kmem, off, 0); 154 read(kmem, (char *)&tcpstat, sizeof (tcpstat)); 155 156 #define p(f, m) printf(m, tcpstat.f, plural(tcpstat.f)) 157 #define p2(f1, f2, m) printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 158 159 p(tcps_sndtotal, "\t%d packet%s sent\n"); 160 p2(tcps_sndpack,tcps_sndbyte, 161 "\t\t%d data packet%s (%d byte%s)\n"); 162 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 163 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 164 p2(tcps_sndacks, tcps_delack, 165 "\t\t%d ack-only packet%s (%d delayed)\n"); 166 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 167 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 168 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 169 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 170 p(tcps_rcvtotal, "\t%d packet%s received\n"); 171 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 172 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 173 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 174 p2(tcps_rcvpack, tcps_rcvbyte, 175 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 176 p2(tcps_rcvduppack, tcps_rcvdupbyte, 177 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 178 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 179 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 180 p2(tcps_rcvoopack, tcps_rcvoobyte, 181 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 182 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 183 "\t\t%d packet%s (%d byte%s) of data after window\n"); 184 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 185 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 186 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 187 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 188 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 189 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 190 p(tcps_connattempt, "\t%d connection request%s\n"); 191 p(tcps_accepts, "\t%d connection accept%s\n"); 192 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 193 p2(tcps_closed, tcps_drops, 194 "\t%d connection%s closed (including %d drop%s)\n"); 195 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 196 p2(tcps_rttupdated, tcps_segstimed, 197 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 198 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 199 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 200 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 201 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 202 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 203 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 204 #undef p 205 #undef p2 206 } 207 208 /* 209 * Dump UDP statistics structure. 210 */ 211 udp_stats(off, name) 212 off_t off; 213 char *name; 214 { 215 struct udpstat udpstat; 216 217 if (off == 0) 218 return; 219 klseek(kmem, off, 0); 220 read(kmem, (char *)&udpstat, sizeof (udpstat)); 221 printf("%s:\n\t%u incomplete header%s\n", name, 222 udpstat.udps_hdrops, plural(udpstat.udps_hdrops)); 223 printf("\t%u bad data length field%s\n", 224 udpstat.udps_badlen, plural(udpstat.udps_badlen)); 225 printf("\t%u bad checksum%s\n", 226 udpstat.udps_badsum, plural(udpstat.udps_badsum)); 227 } 228 229 /* 230 * Dump IP statistics structure. 231 */ 232 ip_stats(off, name) 233 off_t off; 234 char *name; 235 { 236 struct ipstat ipstat; 237 238 if (off == 0) 239 return; 240 klseek(kmem, off, 0); 241 read(kmem, (char *)&ipstat, sizeof (ipstat)); 242 printf("%s:\n\t%u total packets received\n", name, 243 ipstat.ips_total); 244 printf("\t%u bad header checksum%s\n", 245 ipstat.ips_badsum, plural(ipstat.ips_badsum)); 246 printf("\t%u with size smaller than minimum\n", ipstat.ips_tooshort); 247 printf("\t%u with data size < data length\n", ipstat.ips_toosmall); 248 printf("\t%u with header length < data size\n", ipstat.ips_badhlen); 249 printf("\t%u with data length < header length\n", ipstat.ips_badlen); 250 printf("\t%u fragment%s received\n", 251 ipstat.ips_fragments, plural(ipstat.ips_fragments)); 252 printf("\t%u fragment%s dropped (dup or out of space)\n", 253 ipstat.ips_fragdropped, plural(ipstat.ips_fragdropped)); 254 printf("\t%u fragment%s dropped after timeout\n", 255 ipstat.ips_fragtimeout, plural(ipstat.ips_fragtimeout)); 256 printf("\t%u packet%s forwarded\n", 257 ipstat.ips_forward, plural(ipstat.ips_forward)); 258 printf("\t%u packet%s not forwardable\n", 259 ipstat.ips_cantforward, plural(ipstat.ips_cantforward)); 260 printf("\t%u redirect%s sent\n", 261 ipstat.ips_redirectsent, plural(ipstat.ips_redirectsent)); 262 } 263 264 static char *icmpnames[] = { 265 "echo reply", 266 "#1", 267 "#2", 268 "destination unreachable", 269 "source quench", 270 "routing redirect", 271 "#6", 272 "#7", 273 "echo", 274 "#9", 275 "#10", 276 "time exceeded", 277 "parameter problem", 278 "time stamp", 279 "time stamp reply", 280 "information request", 281 "information request reply", 282 "address mask request", 283 "address mask reply", 284 }; 285 286 /* 287 * Dump ICMP statistics. 288 */ 289 icmp_stats(off, name) 290 off_t off; 291 char *name; 292 { 293 struct icmpstat icmpstat; 294 register int i, first; 295 296 if (off == 0) 297 return; 298 klseek(kmem, off, 0); 299 read(kmem, (char *)&icmpstat, sizeof (icmpstat)); 300 printf("%s:\n\t%u call%s to icmp_error\n", name, 301 icmpstat.icps_error, plural(icmpstat.icps_error)); 302 printf("\t%u error%s not generated 'cuz old message was icmp\n", 303 icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp)); 304 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 305 if (icmpstat.icps_outhist[i] != 0) { 306 if (first) { 307 printf("\tOutput histogram:\n"); 308 first = 0; 309 } 310 printf("\t\t%s: %u\n", icmpnames[i], 311 icmpstat.icps_outhist[i]); 312 } 313 printf("\t%u message%s with bad code fields\n", 314 icmpstat.icps_badcode, plural(icmpstat.icps_badcode)); 315 printf("\t%u message%s < minimum length\n", 316 icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort)); 317 printf("\t%u bad checksum%s\n", 318 icmpstat.icps_checksum, plural(icmpstat.icps_checksum)); 319 printf("\t%u message%s with bad length\n", 320 icmpstat.icps_badlen, plural(icmpstat.icps_badlen)); 321 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 322 if (icmpstat.icps_inhist[i] != 0) { 323 if (first) { 324 printf("\tInput histogram:\n"); 325 first = 0; 326 } 327 printf("\t\t%s: %u\n", icmpnames[i], 328 icmpstat.icps_inhist[i]); 329 } 330 printf("\t%u message response%s generated\n", 331 icmpstat.icps_reflect, plural(icmpstat.icps_reflect)); 332 } 333 334 /* 335 * Pretty print an Internet address (net address + port). 336 * If the nflag was specified, use numbers instead of names. 337 */ 338 inetprint(in, port, proto) 339 register struct in_addr *in; 340 u_short port; 341 char *proto; 342 { 343 struct servent *sp = 0; 344 char line[80], *cp, *index(); 345 int width; 346 347 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(*in)); 348 cp = index(line, '\0'); 349 if (!nflag && port) 350 sp = getservbyport((int)port, proto); 351 if (sp || port == 0) 352 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 353 else 354 sprintf(cp, "%d", ntohs((u_short)port)); 355 width = Aflag ? 18 : 22; 356 printf(" %-*.*s", width, width, line); 357 } 358 359 /* 360 * Construct an Internet address representation. 361 * If the nflag has been supplied, give 362 * numeric value, otherwise try for symbolic name. 363 */ 364 char * 365 inetname(in) 366 struct in_addr in; 367 { 368 register char *cp; 369 static char line[50]; 370 struct hostent *hp; 371 struct netent *np; 372 static char domain[MAXHOSTNAMELEN + 1]; 373 static int first = 1; 374 375 if (first && !nflag) { 376 first = 0; 377 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 378 (cp = index(domain, '.'))) 379 (void) strcpy(domain, cp + 1); 380 else 381 domain[0] = 0; 382 } 383 cp = 0; 384 if (!nflag && in.s_addr != INADDR_ANY) { 385 int net = inet_netof(in); 386 int lna = inet_lnaof(in); 387 388 if (lna == INADDR_ANY) { 389 np = getnetbyaddr(net, AF_INET); 390 if (np) 391 cp = np->n_name; 392 } 393 if (cp == 0) { 394 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); 395 if (hp) { 396 if ((cp = index(hp->h_name, '.')) && 397 !strcmp(cp + 1, domain)) 398 *cp = 0; 399 cp = hp->h_name; 400 } 401 } 402 } 403 if (in.s_addr == INADDR_ANY) 404 strcpy(line, "*"); 405 else if (cp) 406 strcpy(line, cp); 407 else { 408 in.s_addr = ntohl(in.s_addr); 409 #define C(x) ((x) & 0xff) 410 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 411 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 412 } 413 return (line); 414 } 415