if.c revision 1.54
1/* $NetBSD: if.c,v 1.54 2003/05/14 23:36:32 itojun 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 1.54 2003/05/14 23:36:32 itojun 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 <stdlib.h> 63#include <string.h> 64#include <unistd.h> 65#include <netdb.h> 66 67#include "netstat.h" 68 69#define YES 1 70#define NO 0 71 72static void sidewaysintpr __P((u_int, u_long)); 73static void catchalarm __P((int)); 74 75/* 76 * Print a description of the network interfaces. 77 * NOTE: ifnetaddr is the location of the kernel global "ifnet", 78 * which is a TAILQ_HEAD. 79 */ 80void 81intpr(interval, ifnetaddr, pfunc) 82 int interval; 83 u_long ifnetaddr; 84 void (*pfunc)(char *); 85{ 86 struct ifnet ifnet; 87 union { 88 struct ifaddr ifa; 89 struct in_ifaddr in; 90#ifdef INET6 91 struct in6_ifaddr in6; 92#endif /* INET6 */ 93 struct ns_ifaddr ns; 94 struct iso_ifaddr iso; 95 } ifaddr; 96 u_long ifaddraddr; 97 struct sockaddr *sa; 98 struct ifnet_head ifhead; /* TAILQ_HEAD */ 99 char name[IFNAMSIZ + 1]; /* + 1 for `*' */ 100 char hbuf[NI_MAXHOST]; /* for getnameinfo() */ 101#ifdef INET6 102#ifdef NI_WITHSCOPEID 103 const int niflag = NI_NUMERICHOST | NI_WITHSCOPEID; 104#else 105 const int niflag = NI_NUMERICHOST; 106#endif 107#endif 108 109 if (ifnetaddr == 0) { 110 printf("ifnet: symbol not defined\n"); 111 return; 112 } 113 if (interval) { 114 sidewaysintpr((unsigned)interval, ifnetaddr); 115 return; 116 } 117 118 /* 119 * Find the pointer to the first ifnet structure. Replace 120 * the pointer to the TAILQ_HEAD with the actual pointer 121 * to the first list element. 122 */ 123 if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead)) 124 return; 125 ifnetaddr = (u_long)ifhead.tqh_first; 126 127 if (!sflag & !pflag) { 128 if (bflag) { 129 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 130 "%10.10s %10.10s", 131 "Name", "Mtu", "Network", "Address", 132 "Ibytes", "Obytes"); 133 } else { 134 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 135 "%8.8s %5.5s %8.8s %5.5s %5.5s", 136 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs", 137 "Opkts", "Oerrs", "Colls"); 138 } 139 if (tflag) 140 printf(" %4.4s", "Time"); 141 if (dflag) 142 printf(" %5.5s", "Drops"); 143 putchar('\n'); 144 } 145 ifaddraddr = 0; 146 while (ifnetaddr || ifaddraddr) { 147 struct sockaddr_in *sin; 148#ifdef INET6 149 struct sockaddr_in6 *sin6; 150#endif /* INET6 */ 151 char *cp; 152 int n, m; 153 154 if (ifaddraddr == 0) { 155 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 156 return; 157 memmove(name, ifnet.if_xname, IFNAMSIZ); 158 name[IFNAMSIZ - 1] = '\0'; /* sanity */ 159 ifnetaddr = (u_long)ifnet.if_list.tqe_next; 160 if (interface != 0 && strcmp(name, interface) != 0) 161 continue; 162 cp = strchr(name, '\0'); 163 164 if (pfunc) { 165 (*pfunc)(name); 166 continue; 167 } 168 169 if ((ifnet.if_flags & IFF_UP) == 0) 170 *cp++ = '*'; 171 *cp = '\0'; 172 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 173 } 174 if (vflag) 175 n = strlen(name) < 5 ? 5 : strlen(name); 176 else 177 n = 5; 178 printf("%-*.*s %-5llu ", n, n, name, 179 (unsigned long long)ifnet.if_mtu); 180 if (ifaddraddr == 0) { 181 printf("%-13.13s ", "none"); 182 printf("%-17.17s ", "none"); 183 } else { 184 char hexsep = '.'; /* for hexprint */ 185 static const char hexfmt[] = "%02x%c"; /* for hexprint */ 186 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 187 ifaddraddr = 0; 188 continue; 189 } 190#define CP(x) ((char *)(x)) 191 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 192 CP(&ifaddr); sa = (struct sockaddr *)cp; 193 switch (sa->sa_family) { 194 case AF_UNSPEC: 195 printf("%-13.13s ", "none"); 196 printf("%-17.17s ", "none"); 197 break; 198 case AF_INET: 199 sin = (struct sockaddr_in *)sa; 200#ifdef notdef 201 /* 202 * can't use inet_makeaddr because kernel 203 * keeps nets unshifted. 204 */ 205 in = inet_makeaddr(ifaddr.in.ia_subnet, 206 INADDR_ANY); 207 cp = netname(in.s_addr, 208 ifaddr.in.ia_subnetmask); 209#else 210 cp = netname(ifaddr.in.ia_subnet, 211 ifaddr.in.ia_subnetmask); 212#endif 213 if (vflag) 214 n = strlen(cp) < 13 ? 13 : strlen(cp); 215 else 216 n = 13; 217 printf("%-*.*s ", n, n, cp); 218 cp = routename(sin->sin_addr.s_addr); 219 if (vflag) 220 n = strlen(cp) < 17 ? 17 : strlen(cp); 221 else 222 n = 17; 223 printf("%-*.*s ", n, n, cp); 224 if (aflag) { 225 u_long multiaddr; 226 struct in_multi inm; 227 228 multiaddr = (u_long) 229 ifaddr.in.ia_multiaddrs.lh_first; 230 while (multiaddr != 0) { 231 kread(multiaddr, (char *)&inm, 232 sizeof inm); 233 printf("\n%25s %-17.17s ", "", 234 routename( 235 inm.inm_addr.s_addr)); 236 multiaddr = 237 (u_long)inm.inm_list.le_next; 238 } 239 } 240 break; 241#ifdef INET6 242 case AF_INET6: 243 sin6 = (struct sockaddr_in6 *)sa; 244#ifdef __KAME__ 245 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 246 sin6->sin6_scope_id = 247 ntohs(*(u_int16_t *) 248 &sin6->sin6_addr.s6_addr[2]); 249 /* too little width */ 250 if (!vflag) 251 sin6->sin6_scope_id = 0; 252 sin6->sin6_addr.s6_addr[2] = 0; 253 sin6->sin6_addr.s6_addr[3] = 0; 254 } 255#endif 256 cp = netname6(&ifaddr.in6.ia_addr, 257 &ifaddr.in6.ia_prefixmask.sin6_addr); 258 if (vflag) 259 n = strlen(cp) < 13 ? 13 : strlen(cp); 260 else 261 n = 13; 262 printf("%-*.*s ", n, n, cp); 263 if (getnameinfo((struct sockaddr *)sin6, 264 sin6->sin6_len, 265 hbuf, sizeof(hbuf), NULL, 0, 266 niflag) != 0) { 267 cp = "?"; 268 } else 269 cp = hbuf; 270 if (vflag) 271 n = strlen(cp) < 17 ? 17 : strlen(cp); 272 else 273 n = 17; 274 printf("%-*.*s ", n, n, cp); 275 if (aflag) { 276 u_long multiaddr; 277 struct in6_multi inm; 278 struct sockaddr_in6 sin6; 279 280 multiaddr = (u_long) 281 ifaddr.in6.ia6_multiaddrs.lh_first; 282 while (multiaddr != 0) { 283 kread(multiaddr, (char *)&inm, 284 sizeof inm); 285 memset(&sin6, 0, sizeof(sin6)); 286 sin6.sin6_len = sizeof(struct sockaddr_in6); 287 sin6.sin6_family = AF_INET6; 288 sin6.sin6_addr = inm.in6m_addr; 289#ifdef __KAME__ 290 if (IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) { 291 sin6.sin6_scope_id = 292 ntohs(*(u_int16_t *) 293 &sin6.sin6_addr.s6_addr[2]); 294 sin6.sin6_addr.s6_addr[2] = 0; 295 sin6.sin6_addr.s6_addr[3] = 0; 296 } 297#endif 298 if (getnameinfo((struct sockaddr *)&sin6, 299 sin6.sin6_len, hbuf, 300 sizeof(hbuf), NULL, 0, 301 niflag) != 0) { 302 strlcpy(hbuf, "??", 303 sizeof(hbuf)); 304 } 305 cp = hbuf; 306 if (vflag) 307 n = strlen(cp) < 17 308 ? 17 : strlen(cp); 309 else 310 n = 17; 311 printf("\n%25s %-*.*s ", "", 312 n, n, cp); 313 multiaddr = 314 (u_long)inm.in6m_entry.le_next; 315 } 316 } 317 break; 318#endif /*INET6*/ 319#ifndef SMALL 320 case AF_APPLETALK: 321 printf("atalk:%-7.7s ", 322 atalk_print(sa,0x10)); 323 printf("%-17.17s ", atalk_print(sa,0x0b)); 324 break; 325 case AF_NS: 326 { 327 struct sockaddr_ns *sns = 328 (struct sockaddr_ns *)sa; 329 u_long net; 330 char netnum[10]; 331 332 *(union ns_net *)&net = sns->sns_addr.x_net; 333 (void)snprintf(netnum, sizeof(netnum), "%xH", 334 (u_int32_t)ntohl(net)); 335 upHex(netnum); 336 printf("ns:%-10s ", netnum); 337 printf("%-17.17s ", 338 ns_phost((struct sockaddr *)sns)); 339 } 340 break; 341#endif 342 case AF_LINK: 343 printf("%-13.13s ", "<Link>"); 344 if (getnameinfo(sa, sa->sa_len, 345 hbuf, sizeof(hbuf), NULL, 0, 346 NI_NUMERICHOST) != 0) { 347 cp = "?"; 348 } else 349 cp = hbuf; 350 if (vflag) 351 n = strlen(cp) < 17 ? 17 : strlen(cp); 352 else 353 n = 17; 354 printf("%-*.*s ", n, n, cp); 355 break; 356 357 default: 358 m = printf("(%d)", sa->sa_family); 359 for (cp = sa->sa_len + (char *)sa; 360 --cp > sa->sa_data && (*cp == 0);) {} 361 n = cp - sa->sa_data + 1; 362 cp = sa->sa_data; 363 while (--n >= 0) 364 m += printf(hexfmt, *cp++ & 0xff, 365 n > 0 ? hexsep : ' '); 366 m = 32 - m; 367 while (m-- > 0) 368 putchar(' '); 369 break; 370 } 371 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 372 } 373 if (bflag) { 374 printf("%10llu %10llu", 375 (unsigned long long)ifnet.if_ibytes, 376 (unsigned long long)ifnet.if_obytes); 377 } else { 378 printf("%8llu %5llu %8llu %5llu %5llu", 379 (unsigned long long)ifnet.if_ipackets, 380 (unsigned long long)ifnet.if_ierrors, 381 (unsigned long long)ifnet.if_opackets, 382 (unsigned long long)ifnet.if_oerrors, 383 (unsigned long long)ifnet.if_collisions); 384 } 385 if (tflag) 386 printf(" %4d", ifnet.if_timer); 387 if (dflag) 388 printf(" %5d", ifnet.if_snd.ifq_drops); 389 putchar('\n'); 390 } 391} 392 393#define MAXIF 100 394struct iftot { 395 char ift_name[IFNAMSIZ]; /* interface name */ 396 u_quad_t ift_ip; /* input packets */ 397 u_quad_t ift_ib; /* input bytes */ 398 u_quad_t ift_ie; /* input errors */ 399 u_quad_t ift_op; /* output packets */ 400 u_quad_t ift_ob; /* output bytes */ 401 u_quad_t ift_oe; /* output errors */ 402 u_quad_t ift_co; /* collisions */ 403 int ift_dr; /* drops */ 404} iftot[MAXIF]; 405 406u_char signalled; /* set if alarm goes off "early" */ 407 408/* 409 * Print a running summary of interface statistics. 410 * Repeat display every interval seconds, showing statistics 411 * collected over that interval. Assumes that interval is non-zero. 412 * First line printed at top of screen is always cumulative. 413 */ 414static void 415sidewaysintpr(interval, off) 416 unsigned interval; 417 u_long off; 418{ 419 struct ifnet ifnet; 420 u_long firstifnet; 421 struct iftot *ip, *total; 422 int line; 423 struct iftot *lastif, *sum, *interesting; 424 struct ifnet_head ifhead; /* TAILQ_HEAD */ 425 int oldmask; 426 427 /* 428 * Find the pointer to the first ifnet structure. Replace 429 * the pointer to the TAILQ_HEAD with the actual pointer 430 * to the first list element. 431 */ 432 if (kread(off, (char *)&ifhead, sizeof ifhead)) 433 return; 434 firstifnet = (u_long)ifhead.tqh_first; 435 436 lastif = iftot; 437 sum = iftot + MAXIF - 1; 438 total = sum - 1; 439 interesting = (interface == NULL) ? iftot : NULL; 440 for (off = firstifnet, ip = iftot; off;) { 441 if (kread(off, (char *)&ifnet, sizeof ifnet)) 442 break; 443 memset(ip->ift_name, 0, sizeof(ip->ift_name)); 444 snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname); 445 if (interface && strcmp(ifnet.if_xname, interface) == 0) 446 interesting = ip; 447 ip++; 448 if (ip >= iftot + MAXIF - 2) 449 break; 450 off = (u_long)ifnet.if_list.tqe_next; 451 } 452 if (interesting == NULL) { 453 fprintf(stderr, "%s: %s: unknown interface\n", 454 getprogname(), interface); 455 exit(1); 456 } 457 lastif = ip; 458 459 (void)signal(SIGALRM, catchalarm); 460 signalled = NO; 461 (void)alarm(interval); 462banner: 463 if (bflag) 464 printf("%7.7s in %8.8s %6.6s out %5.5s", 465 interesting->ift_name, " ", 466 interesting->ift_name, " "); 467 else 468 printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s", 469 interesting->ift_name, " ", 470 interesting->ift_name, " ", " "); 471 if (dflag) 472 printf(" %5.5s", " "); 473 if (lastif - iftot > 0) { 474 if (bflag) 475 printf(" %7.7s in %8.8s %6.6s out %5.5s", 476 "total", " ", "total", " "); 477 else 478 printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s", 479 "total", " ", "total", " ", " "); 480 if (dflag) 481 printf(" %5.5s", " "); 482 } 483 for (ip = iftot; ip < iftot + MAXIF; ip++) { 484 ip->ift_ip = 0; 485 ip->ift_ib = 0; 486 ip->ift_ie = 0; 487 ip->ift_op = 0; 488 ip->ift_ob = 0; 489 ip->ift_oe = 0; 490 ip->ift_co = 0; 491 ip->ift_dr = 0; 492 } 493 putchar('\n'); 494 if (bflag) 495 printf("%10.10s %8.8s %10.10s %5.5s", 496 "bytes", " ", "bytes", " "); 497 else 498 printf("%8.8s %5.5s %8.8s %5.5s %5.5s", 499 "packets", "errs", "packets", "errs", "colls"); 500 if (dflag) 501 printf(" %5.5s", "drops"); 502 if (lastif - iftot > 0) { 503 if (bflag) 504 printf(" %10.10s %8.8s %10.10s %5.5s", 505 "bytes", " ", "bytes", " "); 506 else 507 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 508 "packets", "errs", "packets", "errs", "colls"); 509 if (dflag) 510 printf(" %5.5s", "drops"); 511 } 512 putchar('\n'); 513 fflush(stdout); 514 line = 0; 515loop: 516 sum->ift_ip = 0; 517 sum->ift_ib = 0; 518 sum->ift_ie = 0; 519 sum->ift_op = 0; 520 sum->ift_ob = 0; 521 sum->ift_oe = 0; 522 sum->ift_co = 0; 523 sum->ift_dr = 0; 524 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 525 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 526 off = 0; 527 continue; 528 } 529 if (ip == interesting) { 530 if (bflag) { 531 printf("%10llu %8.8s %10llu %5.5s", 532 (unsigned long long)(ifnet.if_ibytes - 533 ip->ift_ib), " ", 534 (unsigned long long)(ifnet.if_obytes - 535 ip->ift_ob), " "); 536 } else { 537 printf("%8llu %5llu %8llu %5llu %5llu", 538 (unsigned long long) 539 (ifnet.if_ipackets - ip->ift_ip), 540 (unsigned long long) 541 (ifnet.if_ierrors - ip->ift_ie), 542 (unsigned long long) 543 (ifnet.if_opackets - ip->ift_op), 544 (unsigned long long) 545 (ifnet.if_oerrors - ip->ift_oe), 546 (unsigned long long) 547 (ifnet.if_collisions - ip->ift_co)); 548 } 549 if (dflag) 550 printf(" %5llu", 551 (unsigned long long) 552 (ifnet.if_snd.ifq_drops - ip->ift_dr)); 553 } 554 ip->ift_ip = ifnet.if_ipackets; 555 ip->ift_ib = ifnet.if_ibytes; 556 ip->ift_ie = ifnet.if_ierrors; 557 ip->ift_op = ifnet.if_opackets; 558 ip->ift_ob = ifnet.if_obytes; 559 ip->ift_oe = ifnet.if_oerrors; 560 ip->ift_co = ifnet.if_collisions; 561 ip->ift_dr = ifnet.if_snd.ifq_drops; 562 sum->ift_ip += ip->ift_ip; 563 sum->ift_ib += ip->ift_ib; 564 sum->ift_ie += ip->ift_ie; 565 sum->ift_op += ip->ift_op; 566 sum->ift_ob += ip->ift_ob; 567 sum->ift_oe += ip->ift_oe; 568 sum->ift_co += ip->ift_co; 569 sum->ift_dr += ip->ift_dr; 570 off = (u_long)ifnet.if_list.tqe_next; 571 } 572 if (lastif - iftot > 0) { 573 if (bflag) { 574 printf(" %10llu %8.8s %10llu %5.5s", 575 (unsigned long long) 576 (sum->ift_ib - total->ift_ib), " ", 577 (unsigned long long) 578 (sum->ift_ob - total->ift_ob), " "); 579 } else { 580 printf(" %8llu %5llu %8llu %5llu %5llu", 581 (unsigned long long) 582 (sum->ift_ip - total->ift_ip), 583 (unsigned long long) 584 (sum->ift_ie - total->ift_ie), 585 (unsigned long long) 586 (sum->ift_op - total->ift_op), 587 (unsigned long long) 588 (sum->ift_oe - total->ift_oe), 589 (unsigned long long) 590 (sum->ift_co - total->ift_co)); 591 } 592 if (dflag) 593 printf(" %5llu", 594 (unsigned long long)(sum->ift_dr - total->ift_dr)); 595 } 596 *total = *sum; 597 putchar('\n'); 598 fflush(stdout); 599 line++; 600 oldmask = sigblock(sigmask(SIGALRM)); 601 if (! signalled) { 602 sigpause(0); 603 } 604 sigsetmask(oldmask); 605 signalled = NO; 606 (void)alarm(interval); 607 if (line == 21) 608 goto banner; 609 goto loop; 610 /*NOTREACHED*/ 611} 612 613/* 614 * Called if an interval expires before sidewaysintpr has completed a loop. 615 * Sets a flag to not wait for the alarm. 616 */ 617static void 618catchalarm(signo) 619 int signo; 620{ 621 622 signalled = YES; 623} 624