1 /* 2 * Copyright (c) 1983, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)inet.c 5.19 (Berkeley) 07/07/92"; 10 #endif /* not lint */ 11 12 #include <sys/param.h> 13 #include <sys/socket.h> 14 #include <sys/socketvar.h> 15 #include <sys/mbuf.h> 16 #include <sys/protosw.h> 17 18 #include <net/route.h> 19 #include <netinet/in.h> 20 #include <netinet/in_systm.h> 21 #include <netinet/ip.h> 22 #include <netinet/in_pcb.h> 23 #include <netinet/ip_icmp.h> 24 #include <netinet/icmp_var.h> 25 #include <netinet/ip_var.h> 26 #include <netinet/tcp.h> 27 #include <netinet/tcpip.h> 28 #include <netinet/tcp_seq.h> 29 #define TCPSTATES 30 #include <netinet/tcp_fsm.h> 31 #include <netinet/tcp_timer.h> 32 #include <netinet/tcp_var.h> 33 #include <netinet/tcp_debug.h> 34 #include <netinet/udp.h> 35 #include <netinet/udp_var.h> 36 37 #include <arpa/inet.h> 38 #include <netdb.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include "netstat.h" 43 44 struct inpcb inpcb; 45 struct tcpcb tcpcb; 46 struct socket sockb; 47 48 char *inetname __P((struct in_addr *)); 49 void inetprint __P((struct in_addr *, int, char *)); 50 51 /* 52 * Print a summary of connections related to an Internet 53 * protocol. For TCP, also give state of connection. 54 * Listening processes (aflag) are suppressed unless the 55 * -a (all) flag is specified. 56 */ 57 void 58 protopr(off, name) 59 u_long off; 60 char *name; 61 { 62 struct inpcb cb; 63 register struct inpcb *prev, *next; 64 int istcp; 65 static int first = 1; 66 67 if (off == 0) 68 return; 69 istcp = strcmp(name, "tcp") == 0; 70 kread(off, (char *)&cb, sizeof (struct inpcb)); 71 inpcb = cb; 72 prev = (struct inpcb *)off; 73 if (inpcb.inp_next == (struct inpcb *)off) 74 return; 75 while (inpcb.inp_next != (struct inpcb *)off) { 76 next = inpcb.inp_next; 77 kread((u_long)next, (char *)&inpcb, sizeof (inpcb)); 78 if (inpcb.inp_prev != prev) { 79 printf("???\n"); 80 break; 81 } 82 if (!aflag && 83 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) { 84 prev = next; 85 continue; 86 } 87 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 88 if (istcp) { 89 kread((u_long)inpcb.inp_ppcb, 90 (char *)&tcpcb, sizeof (tcpcb)); 91 } 92 if (first) { 93 printf("Active Internet connections"); 94 if (aflag) 95 printf(" (including servers)"); 96 putchar('\n'); 97 if (Aflag) 98 printf("%-8.8s ", "PCB"); 99 printf(Aflag ? 100 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 101 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 102 "Proto", "Recv-Q", "Send-Q", 103 "Local Address", "Foreign Address", "(state)"); 104 first = 0; 105 } 106 if (Aflag) 107 if (istcp) 108 printf("%8x ", inpcb.inp_ppcb); 109 else 110 printf("%8x ", next); 111 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 112 sockb.so_snd.sb_cc); 113 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); 114 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); 115 if (istcp) { 116 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 117 printf(" %d", tcpcb.t_state); 118 else 119 printf(" %s", tcpstates[tcpcb.t_state]); 120 } 121 putchar('\n'); 122 prev = next; 123 } 124 } 125 126 /* 127 * Dump TCP statistics structure. 128 */ 129 void 130 tcp_stats(off, name) 131 u_long off; 132 char *name; 133 { 134 struct tcpstat tcpstat; 135 136 if (off == 0) 137 return; 138 printf ("%s:\n", name); 139 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 140 141 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 142 printf(m, tcpstat.f, plural(tcpstat.f)) 143 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 144 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 145 146 p(tcps_sndtotal, "\t%d packet%s sent\n"); 147 p2(tcps_sndpack,tcps_sndbyte, 148 "\t\t%d data packet%s (%d byte%s)\n"); 149 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 150 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 151 p2(tcps_sndacks, tcps_delack, 152 "\t\t%d ack-only packet%s (%d delayed)\n"); 153 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 154 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 155 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 156 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 157 p(tcps_rcvtotal, "\t%d packet%s received\n"); 158 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 159 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 160 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 161 p2(tcps_rcvpack, tcps_rcvbyte, 162 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 163 p2(tcps_rcvduppack, tcps_rcvdupbyte, 164 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 165 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 166 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 167 p2(tcps_rcvoopack, tcps_rcvoobyte, 168 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 169 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 170 "\t\t%d packet%s (%d byte%s) of data after window\n"); 171 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 172 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 173 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 174 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 175 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 176 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 177 p(tcps_connattempt, "\t%d connection request%s\n"); 178 p(tcps_accepts, "\t%d connection accept%s\n"); 179 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 180 p2(tcps_closed, tcps_drops, 181 "\t%d connection%s closed (including %d drop%s)\n"); 182 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 183 p2(tcps_rttupdated, tcps_segstimed, 184 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 185 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 186 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 187 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 188 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 189 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 190 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 191 #undef p 192 #undef p2 193 } 194 195 /* 196 * Dump UDP statistics structure. 197 */ 198 void 199 udp_stats(off, name) 200 u_long off; 201 char *name; 202 { 203 struct udpstat udpstat; 204 205 if (off == 0) 206 return; 207 kread(off, (char *)&udpstat, sizeof (udpstat)); 208 printf("%s:\n", name); 209 #define p(f, m) if (udpstat.f || sflag <= 1) \ 210 printf(m, udpstat.f, plural(udpstat.f)) 211 p(udps_hdrops, "\t%u incomplete header%s\n"); 212 p(udps_badlen, "\t%u bad data length field%s\n"); 213 p(udps_badsum, "\t%u bad checksum%s\n"); 214 p(udps_noport, "\t%u no port%s\n"); 215 p(udps_noportbcast, "\t%u (arrived as bcast) no port%s\n"); 216 #undef p 217 } 218 219 /* 220 * Dump IP statistics structure. 221 */ 222 void 223 ip_stats(off, name) 224 u_long off; 225 char *name; 226 { 227 struct ipstat ipstat; 228 229 if (off == 0) 230 return; 231 kread(off, (char *)&ipstat, sizeof (ipstat)); 232 printf("%s:\n", name); 233 234 #define p(f, m) if (ipstat.f || sflag <= 1) \ 235 printf(m, ipstat.f, plural(ipstat.f)) 236 237 p(ips_total, "\t%u total packet%s received\n"); 238 p(ips_badsum, "\t%u bad header checksum%s\n"); 239 p(ips_tooshort, "\t%u with size smaller than minimum\n"); 240 p(ips_toosmall, "\t%u with data size < data length\n"); 241 p(ips_badhlen, "\t%u with header length < data size\n"); 242 p(ips_badlen, "\t%u with data length < header length\n"); 243 p(ips_fragments, "\t%u fragment%s received\n"); 244 p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n"); 245 p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n"); 246 p(ips_forward, "\t%u packet%s forwarded\n"); 247 p(ips_cantforward, "\t%u packet%s not forwardable\n"); 248 p(ips_redirectsent, "\t%u redirect%s sent\n"); 249 #undef p 250 } 251 252 static char *icmpnames[] = { 253 "echo reply", 254 "#1", 255 "#2", 256 "destination unreachable", 257 "source quench", 258 "routing redirect", 259 "#6", 260 "#7", 261 "echo", 262 "#9", 263 "#10", 264 "time exceeded", 265 "parameter problem", 266 "time stamp", 267 "time stamp reply", 268 "information request", 269 "information request reply", 270 "address mask request", 271 "address mask reply", 272 }; 273 274 /* 275 * Dump ICMP statistics. 276 */ 277 void 278 icmp_stats(off, name) 279 u_long off; 280 char *name; 281 { 282 struct icmpstat icmpstat; 283 register int i, first; 284 285 if (off == 0) 286 return; 287 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 288 printf("%s:\n", name); 289 290 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 291 printf(m, icmpstat.f, plural(icmpstat.f)) 292 293 p(icps_error, "\t%u call%s to icmp_error\n"); 294 p(icps_oldicmp, 295 "\t%u error%s not generated 'cuz old message was icmp\n"); 296 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 297 if (icmpstat.icps_outhist[i] != 0) { 298 if (first) { 299 printf("\tOutput histogram:\n"); 300 first = 0; 301 } 302 printf("\t\t%s: %u\n", icmpnames[i], 303 icmpstat.icps_outhist[i]); 304 } 305 p(icps_badcode, "\t%u message%s with bad code fields\n"); 306 p(icps_tooshort, "\t%u message%s < minimum length\n"); 307 p(icps_checksum, "\t%u bad checksum%s\n"); 308 p(icps_badlen, "\t%u message%s with bad length\n"); 309 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 310 if (icmpstat.icps_inhist[i] != 0) { 311 if (first) { 312 printf("\tInput histogram:\n"); 313 first = 0; 314 } 315 printf("\t\t%s: %u\n", icmpnames[i], 316 icmpstat.icps_inhist[i]); 317 } 318 p(icps_reflect, "\t%u message response%s generated\n"); 319 #undef p 320 } 321 322 /* 323 * Pretty print an Internet address (net address + port). 324 * If the nflag was specified, use numbers instead of names. 325 */ 326 void 327 inetprint(in, port, proto) 328 register struct in_addr *in; 329 int port; 330 char *proto; 331 { 332 struct servent *sp = 0; 333 char line[80], *cp; 334 int width; 335 336 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 337 cp = index(line, '\0'); 338 if (!nflag && port) 339 sp = getservbyport((int)port, proto); 340 if (sp || port == 0) 341 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 342 else 343 sprintf(cp, "%d", ntohs((u_short)port)); 344 width = Aflag ? 18 : 22; 345 printf(" %-*.*s", width, width, line); 346 } 347 348 /* 349 * Construct an Internet address representation. 350 * If the nflag has been supplied, give 351 * numeric value, otherwise try for symbolic name. 352 */ 353 char * 354 inetname(inp) 355 struct in_addr *inp; 356 { 357 register char *cp; 358 static char line[50]; 359 struct hostent *hp; 360 struct netent *np; 361 static char domain[MAXHOSTNAMELEN + 1]; 362 static int first = 1; 363 364 if (first && !nflag) { 365 first = 0; 366 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 367 (cp = index(domain, '.'))) 368 (void) strcpy(domain, cp + 1); 369 else 370 domain[0] = 0; 371 } 372 cp = 0; 373 if (!nflag && inp->s_addr != INADDR_ANY) { 374 int net = inet_netof(*inp); 375 int lna = inet_lnaof(*inp); 376 377 if (lna == INADDR_ANY) { 378 np = getnetbyaddr(net, AF_INET); 379 if (np) 380 cp = np->n_name; 381 } 382 if (cp == 0) { 383 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 384 if (hp) { 385 if ((cp = index(hp->h_name, '.')) && 386 !strcmp(cp + 1, domain)) 387 *cp = 0; 388 cp = hp->h_name; 389 } 390 } 391 } 392 if (inp->s_addr == INADDR_ANY) 393 strcpy(line, "*"); 394 else if (cp) 395 strcpy(line, cp); 396 else { 397 inp->s_addr = ntohl(inp->s_addr); 398 #define C(x) ((x) & 0xff) 399 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 400 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 401 } 402 return (line); 403 } 404