if.c revision 1.40
1/* $NetBSD: if.c,v 1.40 2000/04/19 03:26:55 enami 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 39static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94"; 40#else 41__RCSID("$NetBSD: if.c,v 1.40 2000/04/19 03:26:55 enami 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#include <netdb.h> 65 66#include "netstat.h" 67 68#define YES 1 69#define NO 0 70 71static void sidewaysintpr __P((u_int, u_long)); 72static void catchalarm __P((int)); 73 74#ifdef INET6 75char *netname6 __P((struct sockaddr_in6 *, struct in6_addr *)); 76#endif 77 78/* 79 * Print a description of the network interfaces. 80 * NOTE: ifnetaddr is the location of the kernel global "ifnet", 81 * which is a TAILQ_HEAD. 82 */ 83void 84intpr(interval, ifnetaddr, pfunc) 85 int interval; 86 u_long ifnetaddr; 87 void (*pfunc)(char *); 88{ 89 struct ifnet ifnet; 90 union { 91 struct ifaddr ifa; 92 struct in_ifaddr in; 93#ifdef INET6 94 struct in6_ifaddr in6; 95#endif /* INET6 */ 96 struct ns_ifaddr ns; 97 struct iso_ifaddr iso; 98 } ifaddr; 99 u_long ifaddraddr; 100 struct sockaddr *sa; 101 struct ifnet_head ifhead; /* TAILQ_HEAD */ 102 char name[IFNAMSIZ]; 103#ifdef INET6 104 char hbuf[NI_MAXHOST]; /* for getnameinfo() */ 105#ifdef KAME_SCOPEID 106 const int niflag = NI_NUMERICHOST | NI_WITHSCOPEID; 107#else 108 const int niflag = NI_NUMERICHOST; 109#endif 110#endif 111 112 if (ifnetaddr == 0) { 113 printf("ifnet: symbol not defined\n"); 114 return; 115 } 116 if (interval) { 117 sidewaysintpr((unsigned)interval, ifnetaddr); 118 return; 119 } 120 121 /* 122 * Find the pointer to the first ifnet structure. Replace 123 * the pointer to the TAILQ_HEAD with the actual pointer 124 * to the first list element. 125 */ 126 if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead)) 127 return; 128 ifnetaddr = (u_long)ifhead.tqh_first; 129 130 if (!sflag & !pflag) { 131 if (bflag) { 132 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 133 "%10.10s %10.10s", 134 "Name", "Mtu", "Network", "Address", 135 "Ibytes", "Obytes"); 136 } else { 137 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 138 "%8.8s %5.5s %8.8s %5.5s %5.5s", 139 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs", 140 "Opkts", "Oerrs", "Colls"); 141 } 142 if (tflag) 143 printf(" %4.4s", "Time"); 144 if (dflag) 145 printf(" %5.5s", "Drops"); 146 putchar('\n'); 147 } 148 ifaddraddr = 0; 149 while (ifnetaddr || ifaddraddr) { 150 struct sockaddr_in *sin; 151#ifdef INET6 152 struct sockaddr_in6 *sin6; 153#endif /* INET6 */ 154 char *cp; 155 int n, m; 156 157 if (ifaddraddr == 0) { 158 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 159 return; 160 memmove(name, ifnet.if_xname, IFNAMSIZ); 161 name[IFNAMSIZ - 1] = '\0'; /* sanity */ 162 ifnetaddr = (u_long)ifnet.if_list.tqe_next; 163 if (interface != 0 && strcmp(name, interface) != 0) 164 continue; 165 cp = strchr(name, '\0'); 166 167 if (pfunc) { 168 (*pfunc)(name); 169 continue; 170 } 171 172 if ((ifnet.if_flags & IFF_UP) == 0) 173 *cp++ = '*'; 174 *cp = '\0'; 175 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 176 } 177 printf("%-5.5s %-5llu ", name, 178 (unsigned long long)ifnet.if_mtu); 179 if (ifaddraddr == 0) { 180 printf("%-13.13s ", "none"); 181 printf("%-17.17s ", "none"); 182 } else { 183 char hexsep = '.'; /* for hexprint */ 184 const char *hexfmt = "%x%c"; /* for hexprint */ 185 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 186 ifaddraddr = 0; 187 continue; 188 } 189#define CP(x) ((char *)(x)) 190 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 191 CP(&ifaddr); sa = (struct sockaddr *)cp; 192 switch (sa->sa_family) { 193 case AF_UNSPEC: 194 printf("%-13.13s ", "none"); 195 printf("%-17.17s ", "none"); 196 break; 197 case AF_INET: 198 sin = (struct sockaddr_in *)sa; 199#ifdef notdef 200 /* 201 * can't use inet_makeaddr because kernel 202 * keeps nets unshifted. 203 */ 204 in = inet_makeaddr(ifaddr.in.ia_subnet, 205 INADDR_ANY); 206 cp = netname(in.s_addr, 207 ifaddr.in.ia_subnetmask); 208#else 209 cp = netname(ifaddr.in.ia_subnet, 210 ifaddr.in.ia_subnetmask); 211#endif 212 if (vflag) 213 n = strlen(cp) < 13 ? 13 : strlen(cp); 214 else 215 n = 13; 216 printf("%-*.*s ", n, n, cp); 217 cp = routename(sin->sin_addr.s_addr); 218 if (vflag) 219 n = strlen(cp) < 17 ? 17 : strlen(cp); 220 else 221 n = 17; 222 printf("%-*.*s ", n, n, cp); 223 if (aflag) { 224 u_long multiaddr; 225 struct in_multi inm; 226 227 multiaddr = (u_long) 228 ifaddr.in.ia_multiaddrs.lh_first; 229 while (multiaddr != 0) { 230 kread(multiaddr, (char *)&inm, 231 sizeof inm); 232 printf("\n%25s %-17.17s ", "", 233 routename( 234 inm.inm_addr.s_addr)); 235 multiaddr = 236 (u_long)inm.inm_list.le_next; 237 } 238 } 239 break; 240#ifdef INET6 241 case AF_INET6: 242 sin6 = (struct sockaddr_in6 *)sa; 243#ifdef KAME_SCOPEID 244 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 245 sin6->sin6_scope_id = 246 ntohs(*(u_int16_t *) 247 &sin6->sin6_addr.s6_addr[2]); 248 /* too little width */ 249 if (!vflag) 250 sin6->sin6_scope_id = 0; 251 sin6->sin6_addr.s6_addr[2] = 0; 252 sin6->sin6_addr.s6_addr[3] = 0; 253 } 254#endif 255 cp = netname6(&ifaddr.in6.ia_addr, 256 &ifaddr.in6.ia_prefixmask.sin6_addr); 257 if (vflag) 258 n = strlen(cp) < 13 ? 13 : strlen(cp); 259 else 260 n = 13; 261 printf("%-*.*s ", n, n, cp); 262 if (getnameinfo((struct sockaddr *)sin6, 263 sin6->sin6_len, 264 hbuf, sizeof(hbuf), NULL, 0, 265 niflag) != 0) { 266 cp = "?"; 267 } else 268 cp = hbuf; 269 if (vflag) 270 n = strlen(cp) < 17 ? 17 : strlen(cp); 271 else 272 n = 17; 273 printf("%-*.*s ", n, n, cp); 274 if (aflag) { 275 u_long multiaddr; 276 struct in6_multi inm; 277 struct sockaddr_in6 sin6; 278 279 multiaddr = (u_long) 280 ifaddr.in6.ia6_multiaddrs.lh_first; 281 while (multiaddr != 0) { 282 kread(multiaddr, (char *)&inm, 283 sizeof inm); 284 memset(&sin6, 0, sizeof(sin6)); 285 sin6.sin6_len = sizeof(struct sockaddr_in6); 286 sin6.sin6_family = AF_INET6; 287 sin6.sin6_addr = inm.in6m_addr; 288 sin6.sin6_scope_id = 289 ntohs(*(u_int16_t *) 290 &sin6.sin6_addr.s6_addr[2]); 291 sin6.sin6_addr.s6_addr[2] = 0; 292 sin6.sin6_addr.s6_addr[3] = 0; 293 if (getnameinfo((struct sockaddr *)&sin6, 294 sin6.sin6_len, hbuf, 295 sizeof(hbuf), NULL, 0, 296 niflag) != 0) { 297 strcpy(hbuf, "??"); 298 } 299 cp = hbuf; 300 if (vflag) 301 n = strlen(cp) < 17 302 ? 17 : strlen(cp); 303 else 304 n = 17; 305 printf("\n%25s %-*.*s ", "", 306 n, n, cp); 307 multiaddr = 308 (u_long)inm.in6m_entry.le_next; 309 } 310 } 311 break; 312#endif /*INET6*/ 313#ifndef SMALL 314 case AF_APPLETALK: 315 printf("atalk:%-7.7s ", 316 atalk_print(sa,0x10)); 317 printf("%-17.17s ", atalk_print(sa,0x0b)); 318 break; 319 case AF_NS: 320 { 321 struct sockaddr_ns *sns = 322 (struct sockaddr_ns *)sa; 323 u_long net; 324 char netnum[8]; 325 326 *(union ns_net *)&net = sns->sns_addr.x_net; 327 (void)sprintf(netnum, "%xH", 328 (u_int32_t)ntohl(net)); 329 upHex(netnum); 330 printf("ns:%-10s ", netnum); 331 printf("%-17.17s ", 332 ns_phost((struct sockaddr *)sns)); 333 } 334 break; 335#endif 336 case AF_LINK: 337 { 338 struct sockaddr_dl *sdl = 339 (struct sockaddr_dl *)sa; 340 cp = (char *)LLADDR(sdl); 341 if (sdl->sdl_type == IFT_FDDI 342 || sdl->sdl_type == IFT_ETHER) 343 hexsep = ':', hexfmt = "%02x%c"; 344 n = sdl->sdl_alen; 345 } 346 m = printf("%-13.13s ", "<Link>"); 347 goto hexprint; 348 default: 349 m = printf("(%d)", sa->sa_family); 350 for (cp = sa->sa_len + (char *)sa; 351 --cp > sa->sa_data && (*cp == 0);) {} 352 n = cp - sa->sa_data + 1; 353 cp = sa->sa_data; 354 hexprint: 355 while (--n >= 0) 356 m += printf(hexfmt, *cp++ & 0xff, 357 n > 0 ? hexsep : ' '); 358 m = 32 - m; 359 while (m-- > 0) 360 putchar(' '); 361 break; 362 } 363 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 364 } 365 if (bflag) { 366 printf("%10llu %10llu", 367 (unsigned long long)ifnet.if_ibytes, 368 (unsigned long long)ifnet.if_obytes); 369 } else { 370 printf("%8llu %5llu %8llu %5llu %5llu", 371 (unsigned long long)ifnet.if_ipackets, 372 (unsigned long long)ifnet.if_ierrors, 373 (unsigned long long)ifnet.if_opackets, 374 (unsigned long long)ifnet.if_oerrors, 375 (unsigned long long)ifnet.if_collisions); 376 } 377 if (tflag) 378 printf(" %4d", ifnet.if_timer); 379 if (dflag) 380 printf(" %5d", ifnet.if_snd.ifq_drops); 381 putchar('\n'); 382 } 383} 384 385#define MAXIF 100 386struct iftot { 387 char ift_name[IFNAMSIZ]; /* interface name */ 388 u_quad_t ift_ip; /* input packets */ 389 u_quad_t ift_ib; /* input bytes */ 390 u_quad_t ift_ie; /* input errors */ 391 u_quad_t ift_op; /* output packets */ 392 u_quad_t ift_ob; /* output bytes */ 393 u_quad_t ift_oe; /* output errors */ 394 u_quad_t ift_co; /* collisions */ 395 int ift_dr; /* drops */ 396} iftot[MAXIF]; 397 398u_char signalled; /* set if alarm goes off "early" */ 399 400/* 401 * Print a running summary of interface statistics. 402 * Repeat display every interval seconds, showing statistics 403 * collected over that interval. Assumes that interval is non-zero. 404 * First line printed at top of screen is always cumulative. 405 */ 406static void 407sidewaysintpr(interval, off) 408 unsigned interval; 409 u_long off; 410{ 411 struct ifnet ifnet; 412 u_long firstifnet; 413 struct iftot *ip, *total; 414 int line; 415 struct iftot *lastif, *sum, *interesting; 416 struct ifnet_head ifhead; /* TAILQ_HEAD */ 417 int oldmask; 418 419 /* 420 * Find the pointer to the first ifnet structure. Replace 421 * the pointer to the TAILQ_HEAD with the actual pointer 422 * to the first list element. 423 */ 424 if (kread(off, (char *)&ifhead, sizeof ifhead)) 425 return; 426 firstifnet = (u_long)ifhead.tqh_first; 427 428 lastif = iftot; 429 sum = iftot + MAXIF - 1; 430 total = sum - 1; 431 interesting = (interface == NULL) ? iftot : NULL; 432 for (off = firstifnet, ip = iftot; off;) { 433 if (kread(off, (char *)&ifnet, sizeof ifnet)) 434 break; 435 memset(ip->ift_name, 0, sizeof(ip->ift_name)); 436 snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname); 437 if (interface && strcmp(ifnet.if_xname, interface) == 0) 438 interesting = ip; 439 ip++; 440 if (ip >= iftot + MAXIF - 2) 441 break; 442 off = (u_long)ifnet.if_list.tqe_next; 443 } 444 if (interesting == NULL) { 445 fprintf(stderr, "%s: %s: unknown interface\n", 446 __progname, interface); 447 exit(1); 448 } 449 lastif = ip; 450 451 (void)signal(SIGALRM, catchalarm); 452 signalled = NO; 453 (void)alarm(interval); 454banner: 455 if (bflag) 456 printf("%7.7s in %8.8s %6.6s out %5.5s", 457 interesting->ift_name, " ", 458 interesting->ift_name, " "); 459 else 460 printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s", 461 interesting->ift_name, " ", 462 interesting->ift_name, " ", " "); 463 if (dflag) 464 printf(" %5.5s", " "); 465 if (lastif - iftot > 0) { 466 if (bflag) 467 printf(" %7.7s in %8.8s %6.6s out %5.5s", 468 "total", " ", "total", " "); 469 else 470 printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s", 471 "total", " ", "total", " ", " "); 472 if (dflag) 473 printf(" %5.5s", " "); 474 } 475 for (ip = iftot; ip < iftot + MAXIF; ip++) { 476 ip->ift_ip = 0; 477 ip->ift_ib = 0; 478 ip->ift_ie = 0; 479 ip->ift_op = 0; 480 ip->ift_ob = 0; 481 ip->ift_oe = 0; 482 ip->ift_co = 0; 483 ip->ift_dr = 0; 484 } 485 putchar('\n'); 486 if (bflag) 487 printf("%10.10s %8.8s %10.10s %5.5s", 488 "bytes", " ", "bytes", " "); 489 else 490 printf("%8.8s %5.5s %8.8s %5.5s %5.5s", 491 "packets", "errs", "packets", "errs", "colls"); 492 if (dflag) 493 printf(" %5.5s", "drops"); 494 if (lastif - iftot > 0) { 495 if (bflag) 496 printf(" %10.10s %8.8s %10.10s %5.5s", 497 "bytes", " ", "bytes", " "); 498 else 499 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 500 "packets", "errs", "packets", "errs", "colls"); 501 if (dflag) 502 printf(" %5.5s", "drops"); 503 } 504 putchar('\n'); 505 fflush(stdout); 506 line = 0; 507loop: 508 sum->ift_ip = 0; 509 sum->ift_ib = 0; 510 sum->ift_ie = 0; 511 sum->ift_op = 0; 512 sum->ift_ob = 0; 513 sum->ift_oe = 0; 514 sum->ift_co = 0; 515 sum->ift_dr = 0; 516 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 517 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 518 off = 0; 519 continue; 520 } 521 if (ip == interesting) { 522 if (bflag) { 523 printf("%10llu %8.8s %10llu %5.5s", 524 (unsigned long long)(ifnet.if_ibytes - 525 ip->ift_ib), " ", 526 (unsigned long long)(ifnet.if_obytes - 527 ip->ift_ob), " "); 528 } else { 529 printf("%8llu %5llu %8llu %5llu %5llu", 530 (unsigned long long) 531 (ifnet.if_ipackets - ip->ift_ip), 532 (unsigned long long) 533 (ifnet.if_ierrors - ip->ift_ie), 534 (unsigned long long) 535 (ifnet.if_opackets - ip->ift_op), 536 (unsigned long long) 537 (ifnet.if_oerrors - ip->ift_oe), 538 (unsigned long long) 539 (ifnet.if_collisions - ip->ift_co)); 540 } 541 if (dflag) 542 printf(" %5llu", 543 (unsigned long long) 544 (ifnet.if_snd.ifq_drops - ip->ift_dr)); 545 } 546 ip->ift_ip = ifnet.if_ipackets; 547 ip->ift_ib = ifnet.if_ibytes; 548 ip->ift_ie = ifnet.if_ierrors; 549 ip->ift_op = ifnet.if_opackets; 550 ip->ift_ob = ifnet.if_obytes; 551 ip->ift_oe = ifnet.if_oerrors; 552 ip->ift_co = ifnet.if_collisions; 553 ip->ift_dr = ifnet.if_snd.ifq_drops; 554 sum->ift_ip += ip->ift_ip; 555 sum->ift_ib += ip->ift_ib; 556 sum->ift_ie += ip->ift_ie; 557 sum->ift_op += ip->ift_op; 558 sum->ift_ob += ip->ift_ob; 559 sum->ift_oe += ip->ift_oe; 560 sum->ift_co += ip->ift_co; 561 sum->ift_dr += ip->ift_dr; 562 off = (u_long)ifnet.if_list.tqe_next; 563 } 564 if (lastif - iftot > 0) { 565 if (bflag) { 566 printf(" %10llu %8.8s %10llu %5.5s", 567 (unsigned long long) 568 (sum->ift_ib - total->ift_ib), " ", 569 (unsigned long long) 570 (sum->ift_ob - total->ift_ob), " "); 571 } else { 572 printf(" %8llu %5llu %8llu %5llu %5llu", 573 (unsigned long long) 574 (sum->ift_ip - total->ift_ip), 575 (unsigned long long) 576 (sum->ift_ie - total->ift_ie), 577 (unsigned long long) 578 (sum->ift_op - total->ift_op), 579 (unsigned long long) 580 (sum->ift_oe - total->ift_oe), 581 (unsigned long long) 582 (sum->ift_co - total->ift_co)); 583 } 584 if (dflag) 585 printf(" %5llu", 586 (unsigned long long)(sum->ift_dr - total->ift_dr)); 587 } 588 *total = *sum; 589 putchar('\n'); 590 fflush(stdout); 591 line++; 592 oldmask = sigblock(sigmask(SIGALRM)); 593 if (! signalled) { 594 sigpause(0); 595 } 596 sigsetmask(oldmask); 597 signalled = NO; 598 (void)alarm(interval); 599 if (line == 21) 600 goto banner; 601 goto loop; 602 /*NOTREACHED*/ 603} 604 605/* 606 * Called if an interval expires before sidewaysintpr has completed a loop. 607 * Sets a flag to not wait for the alarm. 608 */ 609static void 610catchalarm(signo) 611 int signo; 612{ 613 614 signalled = YES; 615} 616