| 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 5.11 (Berkeley) %G%"; |
| 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/in_pcb.h> |
| 35 | #include <netinet/ip.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 | #ifdef sun |
| 228 | printf("\t%d socket overflow%s\n", |
| 229 | udpstat.udps_fullsock, plural(udpstat.udps_fullsock)); |
| 230 | #endif |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * Dump IP statistics structure. |
| 235 | */ |
| 236 | ip_stats(off, name) |
| 237 | off_t off; |
| 238 | char *name; |
| 239 | { |
| 240 | struct ipstat ipstat; |
| 241 | |
| 242 | if (off == 0) |
| 243 | return; |
| 244 | klseek(kmem, off, 0); |
| 245 | read(kmem, (char *)&ipstat, sizeof (ipstat)); |
| 246 | #if BSD>=43 |
| 247 | printf("%s:\n\t%u total packets received\n", name, |
| 248 | ipstat.ips_total); |
| 249 | #endif |
| 250 | printf("\t%u bad header checksum%s\n", |
| 251 | ipstat.ips_badsum, plural(ipstat.ips_badsum)); |
| 252 | printf("\t%u with size smaller than minimum\n", ipstat.ips_tooshort); |
| 253 | printf("\t%u with data size < data length\n", ipstat.ips_toosmall); |
| 254 | printf("\t%u with header length < data size\n", ipstat.ips_badhlen); |
| 255 | printf("\t%u with data length < header length\n", ipstat.ips_badlen); |
| 256 | #if BSD>=43 |
| 257 | printf("\t%u fragment%s received\n", |
| 258 | ipstat.ips_fragments, plural(ipstat.ips_fragments)); |
| 259 | printf("\t%u fragment%s dropped (dup or out of space)\n", |
| 260 | ipstat.ips_fragdropped, plural(ipstat.ips_fragdropped)); |
| 261 | printf("\t%u fragment%s dropped after timeout\n", |
| 262 | ipstat.ips_fragtimeout, plural(ipstat.ips_fragtimeout)); |
| 263 | printf("\t%u packet%s forwarded\n", |
| 264 | ipstat.ips_forward, plural(ipstat.ips_forward)); |
| 265 | printf("\t%u packet%s not forwardable\n", |
| 266 | ipstat.ips_cantforward, plural(ipstat.ips_cantforward)); |
| 267 | printf("\t%u redirect%s sent\n", |
| 268 | ipstat.ips_redirectsent, plural(ipstat.ips_redirectsent)); |
| 269 | #endif |
| 270 | } |
| 271 | |
| 272 | static char *icmpnames[] = { |
| 273 | "echo reply", |
| 274 | "#1", |
| 275 | "#2", |
| 276 | "destination unreachable", |
| 277 | "source quench", |
| 278 | "routing redirect", |
| 279 | "#6", |
| 280 | "#7", |
| 281 | "echo", |
| 282 | "#9", |
| 283 | "#10", |
| 284 | "time exceeded", |
| 285 | "parameter problem", |
| 286 | "time stamp", |
| 287 | "time stamp reply", |
| 288 | "information request", |
| 289 | "information request reply", |
| 290 | "address mask request", |
| 291 | "address mask reply", |
| 292 | }; |
| 293 | |
| 294 | /* |
| 295 | * Dump ICMP statistics. |
| 296 | */ |
| 297 | icmp_stats(off, name) |
| 298 | off_t off; |
| 299 | char *name; |
| 300 | { |
| 301 | struct icmpstat icmpstat; |
| 302 | register int i, first; |
| 303 | |
| 304 | if (off == 0) |
| 305 | return; |
| 306 | klseek(kmem, off, 0); |
| 307 | read(kmem, (char *)&icmpstat, sizeof (icmpstat)); |
| 308 | printf("%s:\n\t%u call%s to icmp_error\n", name, |
| 309 | icmpstat.icps_error, plural(icmpstat.icps_error)); |
| 310 | printf("\t%u error%s not generated 'cuz old message was icmp\n", |
| 311 | icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp)); |
| 312 | for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) |
| 313 | if (icmpstat.icps_outhist[i] != 0) { |
| 314 | if (first) { |
| 315 | printf("\tOutput histogram:\n"); |
| 316 | first = 0; |
| 317 | } |
| 318 | printf("\t\t%s: %u\n", icmpnames[i], |
| 319 | icmpstat.icps_outhist[i]); |
| 320 | } |
| 321 | printf("\t%u message%s with bad code fields\n", |
| 322 | icmpstat.icps_badcode, plural(icmpstat.icps_badcode)); |
| 323 | printf("\t%u message%s < minimum length\n", |
| 324 | icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort)); |
| 325 | printf("\t%u bad checksum%s\n", |
| 326 | icmpstat.icps_checksum, plural(icmpstat.icps_checksum)); |
| 327 | printf("\t%u message%s with bad length\n", |
| 328 | icmpstat.icps_badlen, plural(icmpstat.icps_badlen)); |
| 329 | for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) |
| 330 | if (icmpstat.icps_inhist[i] != 0) { |
| 331 | if (first) { |
| 332 | printf("\tInput histogram:\n"); |
| 333 | first = 0; |
| 334 | } |
| 335 | printf("\t\t%s: %u\n", icmpnames[i], |
| 336 | icmpstat.icps_inhist[i]); |
| 337 | } |
| 338 | printf("\t%u message response%s generated\n", |
| 339 | icmpstat.icps_reflect, plural(icmpstat.icps_reflect)); |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * Pretty print an Internet address (net address + port). |
| 344 | * If the nflag was specified, use numbers instead of names. |
| 345 | */ |
| 346 | inetprint(in, port, proto) |
| 347 | register struct in_addr *in; |
| 348 | u_short port; |
| 349 | char *proto; |
| 350 | { |
| 351 | struct servent *sp = 0; |
| 352 | char line[80], *cp, *index(); |
| 353 | int width; |
| 354 | |
| 355 | sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(*in)); |
| 356 | cp = index(line, '\0'); |
| 357 | if (!nflag && port) |
| 358 | sp = getservbyport((int)port, proto); |
| 359 | if (sp || port == 0) |
| 360 | sprintf(cp, "%.8s", sp ? sp->s_name : "*"); |
| 361 | else |
| 362 | sprintf(cp, "%d", ntohs((u_short)port)); |
| 363 | width = Aflag ? 18 : 22; |
| 364 | printf(" %-*.*s", width, width, line); |
| 365 | } |
| 366 | |
| 367 | /* |
| 368 | * Construct an Internet address representation. |
| 369 | * If the nflag has been supplied, give |
| 370 | * numeric value, otherwise try for symbolic name. |
| 371 | */ |
| 372 | char * |
| 373 | inetname(in) |
| 374 | struct in_addr in; |
| 375 | { |
| 376 | register char *cp; |
| 377 | static char line[50]; |
| 378 | struct hostent *hp; |
| 379 | struct netent *np; |
| 380 | static char domain[MAXHOSTNAMELEN + 1]; |
| 381 | static int first = 1; |
| 382 | |
| 383 | if (first && !nflag) { |
| 384 | first = 0; |
| 385 | if (gethostname(domain, MAXHOSTNAMELEN) == 0 && |
| 386 | (cp = index(domain, '.'))) |
| 387 | (void) strcpy(domain, cp + 1); |
| 388 | else |
| 389 | domain[0] = 0; |
| 390 | } |
| 391 | cp = 0; |
| 392 | if (!nflag && in.s_addr != INADDR_ANY) { |
| 393 | int net = inet_netof(in); |
| 394 | int lna = inet_lnaof(in); |
| 395 | |
| 396 | if (lna == INADDR_ANY) { |
| 397 | np = getnetbyaddr(net, AF_INET); |
| 398 | if (np) |
| 399 | cp = np->n_name; |
| 400 | } |
| 401 | if (cp == 0) { |
| 402 | hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); |
| 403 | if (hp) { |
| 404 | if ((cp = index(hp->h_name, '.')) && |
| 405 | !strcmp(cp + 1, domain)) |
| 406 | *cp = 0; |
| 407 | cp = hp->h_name; |
| 408 | } |
| 409 | } |
| 410 | } |
| 411 | if (in.s_addr == INADDR_ANY) |
| 412 | strcpy(line, "*"); |
| 413 | else if (cp) |
| 414 | strcpy(line, cp); |
| 415 | else { |
| 416 | in.s_addr = ntohl(in.s_addr); |
| 417 | #define C(x) ((x) & 0xff) |
| 418 | sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), |
| 419 | C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); |
| 420 | } |
| 421 | return (line); |
| 422 | } |