if.c revision 1.31
1 /* $NetBSD: if.c,v 1.31 1999/03/14 22:28:05 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94"; 40 #else 41 __RCSID("$NetBSD: if.c,v 1.31 1999/03/14 22:28:05 mycroft Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/protosw.h> 47 #include <sys/socket.h> 48 49 #include <net/if.h> 50 #include <net/if_dl.h> 51 #include <net/if_types.h> 52 #include <netinet/in.h> 53 #include <netinet/in_var.h> 54 #include <netns/ns.h> 55 #include <netns/ns_if.h> 56 #include <netiso/iso.h> 57 #include <netiso/iso_var.h> 58 #include <arpa/inet.h> 59 60 #include <signal.h> 61 #include <stdio.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "netstat.h" 66 67 #define YES 1 68 #define NO 0 69 70 static void sidewaysintpr __P((u_int, u_long)); 71 static void catchalarm __P((int)); 72 73 /* 74 * Print a description of the network interfaces. 75 * NOTE: ifnetaddr is the location of the kernel global "ifnet", 76 * which is a TAILQ_HEAD. 77 */ 78 void 79 intpr(interval, ifnetaddr) 80 int interval; 81 u_long ifnetaddr; 82 { 83 struct ifnet ifnet; 84 union { 85 struct ifaddr ifa; 86 struct in_ifaddr in; 87 struct ns_ifaddr ns; 88 struct iso_ifaddr iso; 89 } ifaddr; 90 u_long ifaddraddr; 91 struct sockaddr *sa; 92 struct ifnet_head ifhead; /* TAILQ_HEAD */ 93 char name[IFNAMSIZ]; 94 95 if (ifnetaddr == 0) { 96 printf("ifnet: symbol not defined\n"); 97 return; 98 } 99 if (interval) { 100 sidewaysintpr((unsigned)interval, ifnetaddr); 101 return; 102 } 103 104 /* 105 * Find the pointer to the first ifnet structure. Replace 106 * the pointer to the TAILQ_HEAD with the actual pointer 107 * to the first list element. 108 */ 109 if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead)) 110 return; 111 ifnetaddr = (u_long)ifhead.tqh_first; 112 113 if (bflag) { 114 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 115 "%10.10s %10.10s", 116 "Name", "Mtu", "Network", "Address", 117 "Ibytes", "Obytes"); 118 } else { 119 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 120 "%8.8s %5.5s %8.8s %5.5s %5.5s", 121 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs", 122 "Opkts", "Oerrs", "Colls"); 123 } 124 if (tflag) 125 printf(" %4.4s", "Time"); 126 if (dflag) 127 printf(" %5.5s", "Drops"); 128 putchar('\n'); 129 ifaddraddr = 0; 130 while (ifnetaddr || ifaddraddr) { 131 struct sockaddr_in *sin; 132 char *cp; 133 int n, m; 134 135 if (ifaddraddr == 0) { 136 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 137 return; 138 memmove(name, ifnet.if_xname, IFNAMSIZ); 139 name[IFNAMSIZ - 1] = '\0'; /* sanity */ 140 ifnetaddr = (u_long)ifnet.if_list.tqe_next; 141 if (interface != 0 && strcmp(name, interface) != 0) 142 continue; 143 cp = strchr(name, '\0'); 144 if ((ifnet.if_flags & IFF_UP) == 0) 145 *cp++ = '*'; 146 *cp = '\0'; 147 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 148 } 149 printf("%-5.5s %-5lu ", name, ifnet.if_mtu); 150 if (ifaddraddr == 0) { 151 printf("%-13.13s ", "none"); 152 printf("%-17.17s ", "none"); 153 } else { 154 char hexsep = '.'; /* for hexprint */ 155 const char *hexfmt = "%x%c"; /* for hexprint */ 156 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 157 ifaddraddr = 0; 158 continue; 159 } 160 #define CP(x) ((char *)(x)) 161 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 162 CP(&ifaddr); sa = (struct sockaddr *)cp; 163 switch (sa->sa_family) { 164 case AF_UNSPEC: 165 printf("%-13.13s ", "none"); 166 printf("%-17.17s ", "none"); 167 break; 168 case AF_INET: 169 sin = (struct sockaddr_in *)sa; 170 #ifdef notdef 171 /* 172 * can't use inet_makeaddr because kernel 173 * keeps nets unshifted. 174 */ 175 in = inet_makeaddr(ifaddr.in.ia_subnet, 176 INADDR_ANY); 177 printf("%-13.13s ", netname(in.s_addr, 178 ifaddr.in.ia_subnetmask)); 179 #else 180 printf("%-13.13s ", 181 netname(ifaddr.in.ia_subnet, 182 ifaddr.in.ia_subnetmask)); 183 #endif 184 printf("%-17.17s ", 185 routename(sin->sin_addr.s_addr)); 186 187 if (aflag) { 188 u_long multiaddr; 189 struct in_multi inm; 190 191 multiaddr = (u_long) 192 ifaddr.in.ia_multiaddrs.lh_first; 193 while (multiaddr != 0) { 194 kread(multiaddr, (char *)&inm, 195 sizeof inm); 196 printf("\n%25s %-17.17s ", "", 197 routename( 198 inm.inm_addr.s_addr)); 199 multiaddr = 200 (u_long)inm.inm_list.le_next; 201 } 202 } 203 break; 204 #ifndef SMALL 205 case AF_APPLETALK: 206 printf("atalk:%-7.7s ", 207 atalk_print(sa,0x10)); 208 printf("%-17.17s ", atalk_print(sa,0x0b)); 209 break; 210 case AF_NS: 211 { 212 struct sockaddr_ns *sns = 213 (struct sockaddr_ns *)sa; 214 u_long net; 215 char netnum[8]; 216 217 *(union ns_net *)&net = sns->sns_addr.x_net; 218 (void)sprintf(netnum, "%xH", 219 (u_int32_t)ntohl(net)); 220 upHex(netnum); 221 printf("ns:%-10s ", netnum); 222 printf("%-17.17s ", 223 ns_phost((struct sockaddr *)sns)); 224 } 225 break; 226 #endif 227 case AF_LINK: 228 { 229 struct sockaddr_dl *sdl = 230 (struct sockaddr_dl *)sa; 231 cp = (char *)LLADDR(sdl); 232 if (sdl->sdl_type == IFT_FDDI 233 || sdl->sdl_type == IFT_ETHER) 234 hexsep = ':', hexfmt = "%02x%c"; 235 n = sdl->sdl_alen; 236 } 237 m = printf("%-13.13s ", "<Link>"); 238 goto hexprint; 239 default: 240 m = printf("(%d)", sa->sa_family); 241 for (cp = sa->sa_len + (char *)sa; 242 --cp > sa->sa_data && (*cp == 0);) {} 243 n = cp - sa->sa_data + 1; 244 cp = sa->sa_data; 245 hexprint: 246 while (--n >= 0) 247 m += printf(hexfmt, *cp++ & 0xff, 248 n > 0 ? hexsep : ' '); 249 m = 32 - m; 250 while (m-- > 0) 251 putchar(' '); 252 break; 253 } 254 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 255 } 256 if (bflag) { 257 printf("%10lu %10lu", 258 ifnet.if_ibytes, ifnet.if_obytes); 259 } else { 260 printf("%8lu %5lu %8lu %5lu %5lu", 261 ifnet.if_ipackets, ifnet.if_ierrors, 262 ifnet.if_opackets, ifnet.if_oerrors, 263 ifnet.if_collisions); 264 } 265 if (tflag) 266 printf(" %4d", ifnet.if_timer); 267 if (dflag) 268 printf(" %5d", ifnet.if_snd.ifq_drops); 269 putchar('\n'); 270 } 271 } 272 273 #define MAXIF 100 274 struct iftot { 275 char ift_name[IFNAMSIZ]; /* interface name */ 276 u_long ift_ip; /* input packets */ 277 u_long ift_ib; /* input bytes */ 278 u_long ift_ie; /* input errors */ 279 u_long ift_op; /* output packets */ 280 u_long ift_ob; /* output bytes */ 281 u_long ift_oe; /* output errors */ 282 u_long ift_co; /* collisions */ 283 int ift_dr; /* drops */ 284 } iftot[MAXIF]; 285 286 u_char signalled; /* set if alarm goes off "early" */ 287 288 /* 289 * Print a running summary of interface statistics. 290 * Repeat display every interval seconds, showing statistics 291 * collected over that interval. Assumes that interval is non-zero. 292 * First line printed at top of screen is always cumulative. 293 */ 294 static void 295 sidewaysintpr(interval, off) 296 unsigned interval; 297 u_long off; 298 { 299 struct ifnet ifnet; 300 u_long firstifnet; 301 struct iftot *ip, *total; 302 int line; 303 struct iftot *lastif, *sum, *interesting; 304 struct ifnet_head ifhead; /* TAILQ_HEAD */ 305 int oldmask; 306 307 /* 308 * Find the pointer to the first ifnet structure. Replace 309 * the pointer to the TAILQ_HEAD with the actual pointer 310 * to the first list element. 311 */ 312 if (kread(off, (char *)&ifhead, sizeof ifhead)) 313 return; 314 firstifnet = (u_long)ifhead.tqh_first; 315 316 lastif = iftot; 317 sum = iftot + MAXIF - 1; 318 total = sum - 1; 319 interesting = (interface == NULL) ? iftot : NULL; 320 for (off = firstifnet, ip = iftot; off;) { 321 if (kread(off, (char *)&ifnet, sizeof ifnet)) 322 break; 323 memset(ip->ift_name, 0, sizeof(ip->ift_name)); 324 snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname); 325 if (interface && strcmp(ifnet.if_xname, interface) == 0) 326 interesting = ip; 327 ip++; 328 if (ip >= iftot + MAXIF - 2) 329 break; 330 off = (u_long)ifnet.if_list.tqe_next; 331 } 332 if (interesting == NULL) { 333 fprintf(stderr, "%s: %s: unknown interface\n", 334 __progname, interface); 335 exit(1); 336 } 337 lastif = ip; 338 339 (void)signal(SIGALRM, catchalarm); 340 signalled = NO; 341 (void)alarm(interval); 342 banner: 343 if (bflag) 344 printf("%7.7s in %8.8s %6.6s out %5.5s", 345 interesting->ift_name, " ", 346 interesting->ift_name, " "); 347 else 348 printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s", 349 interesting->ift_name, " ", 350 interesting->ift_name, " ", " "); 351 if (dflag) 352 printf(" %5.5s", " "); 353 if (lastif - iftot > 0) { 354 if (bflag) 355 printf(" %7.7s in %8.8s %6.6s out %5.5s", 356 "total", " ", "total", " "); 357 else 358 printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s", 359 "total", " ", "total", " ", " "); 360 if (dflag) 361 printf(" %5.5s", " "); 362 } 363 for (ip = iftot; ip < iftot + MAXIF; ip++) { 364 ip->ift_ip = 0; 365 ip->ift_ib = 0; 366 ip->ift_ie = 0; 367 ip->ift_op = 0; 368 ip->ift_ob = 0; 369 ip->ift_oe = 0; 370 ip->ift_co = 0; 371 ip->ift_dr = 0; 372 } 373 putchar('\n'); 374 if (bflag) 375 printf("%10.10s %8.8s %10.10s %5.5s", 376 "bytes", " ", "bytes", " "); 377 else 378 printf("%8.8s %5.5s %8.8s %5.5s %5.5s", 379 "packets", "errs", "packets", "errs", "colls"); 380 if (dflag) 381 printf(" %5.5s", "drops"); 382 if (lastif - iftot > 0) { 383 if (bflag) 384 printf(" %10.10s %8.8s %10.10s %5.5s", 385 "bytes", " ", "bytes", " "); 386 else 387 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 388 "packets", "errs", "packets", "errs", "colls"); 389 if (dflag) 390 printf(" %5.5s", "drops"); 391 } 392 putchar('\n'); 393 fflush(stdout); 394 line = 0; 395 loop: 396 sum->ift_ip = 0; 397 sum->ift_ib = 0; 398 sum->ift_ie = 0; 399 sum->ift_op = 0; 400 sum->ift_ob = 0; 401 sum->ift_oe = 0; 402 sum->ift_co = 0; 403 sum->ift_dr = 0; 404 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 405 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 406 off = 0; 407 continue; 408 } 409 if (ip == interesting) { 410 if (bflag) { 411 printf("%10lu %8.8s %10lu %5.5s", 412 ifnet.if_ibytes - ip->ift_ib, " ", 413 ifnet.if_obytes - ip->ift_ob, " "); 414 } else { 415 printf("%8lu %5lu %8lu %5lu %5lu", 416 ifnet.if_ipackets - ip->ift_ip, 417 ifnet.if_ierrors - ip->ift_ie, 418 ifnet.if_opackets - ip->ift_op, 419 ifnet.if_oerrors - ip->ift_oe, 420 ifnet.if_collisions - ip->ift_co); 421 } 422 if (dflag) 423 printf(" %5d", 424 ifnet.if_snd.ifq_drops - ip->ift_dr); 425 } 426 ip->ift_ip = ifnet.if_ipackets; 427 ip->ift_ib = ifnet.if_ibytes; 428 ip->ift_ie = ifnet.if_ierrors; 429 ip->ift_op = ifnet.if_opackets; 430 ip->ift_ob = ifnet.if_obytes; 431 ip->ift_oe = ifnet.if_oerrors; 432 ip->ift_co = ifnet.if_collisions; 433 ip->ift_dr = ifnet.if_snd.ifq_drops; 434 sum->ift_ip += ip->ift_ip; 435 sum->ift_ib += ip->ift_ib; 436 sum->ift_ie += ip->ift_ie; 437 sum->ift_op += ip->ift_op; 438 sum->ift_ob += ip->ift_ob; 439 sum->ift_oe += ip->ift_oe; 440 sum->ift_co += ip->ift_co; 441 sum->ift_dr += ip->ift_dr; 442 off = (u_long)ifnet.if_list.tqe_next; 443 } 444 if (lastif - iftot > 0) { 445 if (bflag) { 446 printf(" %10lu %8.8s %10lu %5.5s", 447 sum->ift_ib - total->ift_ib, " ", 448 sum->ift_ob - total->ift_ob, " "); 449 } else { 450 printf(" %8lu %5lu %8lu %5lu %5lu", 451 sum->ift_ip - total->ift_ip, 452 sum->ift_ie - total->ift_ie, 453 sum->ift_op - total->ift_op, 454 sum->ift_oe - total->ift_oe, 455 sum->ift_co - total->ift_co); 456 } 457 if (dflag) 458 printf(" %5d", sum->ift_dr - total->ift_dr); 459 } 460 *total = *sum; 461 putchar('\n'); 462 fflush(stdout); 463 line++; 464 oldmask = sigblock(sigmask(SIGALRM)); 465 if (! signalled) { 466 sigpause(0); 467 } 468 sigsetmask(oldmask); 469 signalled = NO; 470 (void)alarm(interval); 471 if (line == 21) 472 goto banner; 473 goto loop; 474 /*NOTREACHED*/ 475 } 476 477 /* 478 * Called if an interval expires before sidewaysintpr has completed a loop. 479 * Sets a flag to not wait for the alarm. 480 */ 481 static void 482 catchalarm(signo) 483 int signo; 484 { 485 486 signalled = YES; 487 } 488
Indexes created Fri Sep 26 20:09:58 GMT 2025