if.c revision 1.55
1 /* $NetBSD: if.c,v 1.55 2003/08/07 11:15:18 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94"; 36 #else 37 __RCSID("$NetBSD: if.c,v 1.55 2003/08/07 11:15:18 agc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/types.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 45 #include <net/if.h> 46 #include <net/if_dl.h> 47 #include <net/if_types.h> 48 #include <netinet/in.h> 49 #include <netinet/in_var.h> 50 #include <netns/ns.h> 51 #include <netns/ns_if.h> 52 #include <netiso/iso.h> 53 #include <netiso/iso_var.h> 54 #include <arpa/inet.h> 55 56 #include <signal.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <netdb.h> 62 63 #include "netstat.h" 64 65 #define YES 1 66 #define NO 0 67 68 static void sidewaysintpr __P((u_int, u_long)); 69 static void catchalarm __P((int)); 70 71 /* 72 * Print a description of the network interfaces. 73 * NOTE: ifnetaddr is the location of the kernel global "ifnet", 74 * which is a TAILQ_HEAD. 75 */ 76 void 77 intpr(interval, ifnetaddr, pfunc) 78 int interval; 79 u_long ifnetaddr; 80 void (*pfunc)(char *); 81 { 82 struct ifnet ifnet; 83 union { 84 struct ifaddr ifa; 85 struct in_ifaddr in; 86 #ifdef INET6 87 struct in6_ifaddr in6; 88 #endif /* INET6 */ 89 struct ns_ifaddr ns; 90 struct iso_ifaddr iso; 91 } ifaddr; 92 u_long ifaddraddr; 93 struct sockaddr *sa; 94 struct ifnet_head ifhead; /* TAILQ_HEAD */ 95 char name[IFNAMSIZ + 1]; /* + 1 for `*' */ 96 char hbuf[NI_MAXHOST]; /* for getnameinfo() */ 97 #ifdef INET6 98 #ifdef NI_WITHSCOPEID 99 const int niflag = NI_NUMERICHOST | NI_WITHSCOPEID; 100 #else 101 const int niflag = NI_NUMERICHOST; 102 #endif 103 #endif 104 105 if (ifnetaddr == 0) { 106 printf("ifnet: symbol not defined\n"); 107 return; 108 } 109 if (interval) { 110 sidewaysintpr((unsigned)interval, ifnetaddr); 111 return; 112 } 113 114 /* 115 * Find the pointer to the first ifnet structure. Replace 116 * the pointer to the TAILQ_HEAD with the actual pointer 117 * to the first list element. 118 */ 119 if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead)) 120 return; 121 ifnetaddr = (u_long)ifhead.tqh_first; 122 123 if (!sflag & !pflag) { 124 if (bflag) { 125 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 126 "%10.10s %10.10s", 127 "Name", "Mtu", "Network", "Address", 128 "Ibytes", "Obytes"); 129 } else { 130 printf("%-5.5s %-5.5s %-13.13s %-17.17s " 131 "%8.8s %5.5s %8.8s %5.5s %5.5s", 132 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs", 133 "Opkts", "Oerrs", "Colls"); 134 } 135 if (tflag) 136 printf(" %4.4s", "Time"); 137 if (dflag) 138 printf(" %5.5s", "Drops"); 139 putchar('\n'); 140 } 141 ifaddraddr = 0; 142 while (ifnetaddr || ifaddraddr) { 143 struct sockaddr_in *sin; 144 #ifdef INET6 145 struct sockaddr_in6 *sin6; 146 #endif /* INET6 */ 147 char *cp; 148 int n, m; 149 150 if (ifaddraddr == 0) { 151 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 152 return; 153 memmove(name, ifnet.if_xname, IFNAMSIZ); 154 name[IFNAMSIZ - 1] = '\0'; /* sanity */ 155 ifnetaddr = (u_long)ifnet.if_list.tqe_next; 156 if (interface != 0 && strcmp(name, interface) != 0) 157 continue; 158 cp = strchr(name, '\0'); 159 160 if (pfunc) { 161 (*pfunc)(name); 162 continue; 163 } 164 165 if ((ifnet.if_flags & IFF_UP) == 0) 166 *cp++ = '*'; 167 *cp = '\0'; 168 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 169 } 170 if (vflag) 171 n = strlen(name) < 5 ? 5 : strlen(name); 172 else 173 n = 5; 174 printf("%-*.*s %-5llu ", n, n, name, 175 (unsigned long long)ifnet.if_mtu); 176 if (ifaddraddr == 0) { 177 printf("%-13.13s ", "none"); 178 printf("%-17.17s ", "none"); 179 } else { 180 char hexsep = '.'; /* for hexprint */ 181 static const char hexfmt[] = "%02x%c"; /* for hexprint */ 182 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 183 ifaddraddr = 0; 184 continue; 185 } 186 #define CP(x) ((char *)(x)) 187 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 188 CP(&ifaddr); sa = (struct sockaddr *)cp; 189 switch (sa->sa_family) { 190 case AF_UNSPEC: 191 printf("%-13.13s ", "none"); 192 printf("%-17.17s ", "none"); 193 break; 194 case AF_INET: 195 sin = (struct sockaddr_in *)sa; 196 #ifdef notdef 197 /* 198 * can't use inet_makeaddr because kernel 199 * keeps nets unshifted. 200 */ 201 in = inet_makeaddr(ifaddr.in.ia_subnet, 202 INADDR_ANY); 203 cp = netname(in.s_addr, 204 ifaddr.in.ia_subnetmask); 205 #else 206 cp = netname(ifaddr.in.ia_subnet, 207 ifaddr.in.ia_subnetmask); 208 #endif 209 if (vflag) 210 n = strlen(cp) < 13 ? 13 : strlen(cp); 211 else 212 n = 13; 213 printf("%-*.*s ", n, n, cp); 214 cp = routename(sin->sin_addr.s_addr); 215 if (vflag) 216 n = strlen(cp) < 17 ? 17 : strlen(cp); 217 else 218 n = 17; 219 printf("%-*.*s ", n, n, cp); 220 if (aflag) { 221 u_long multiaddr; 222 struct in_multi inm; 223 224 multiaddr = (u_long) 225 ifaddr.in.ia_multiaddrs.lh_first; 226 while (multiaddr != 0) { 227 kread(multiaddr, (char *)&inm, 228 sizeof inm); 229 printf("\n%25s %-17.17s ", "", 230 routename( 231 inm.inm_addr.s_addr)); 232 multiaddr = 233 (u_long)inm.inm_list.le_next; 234 } 235 } 236 break; 237 #ifdef INET6 238 case AF_INET6: 239 sin6 = (struct sockaddr_in6 *)sa; 240 #ifdef __KAME__ 241 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 242 sin6->sin6_scope_id = 243 ntohs(*(u_int16_t *) 244 &sin6->sin6_addr.s6_addr[2]); 245 /* too little width */ 246 if (!vflag) 247 sin6->sin6_scope_id = 0; 248 sin6->sin6_addr.s6_addr[2] = 0; 249 sin6->sin6_addr.s6_addr[3] = 0; 250 } 251 #endif 252 cp = netname6(&ifaddr.in6.ia_addr, 253 &ifaddr.in6.ia_prefixmask.sin6_addr); 254 if (vflag) 255 n = strlen(cp) < 13 ? 13 : strlen(cp); 256 else 257 n = 13; 258 printf("%-*.*s ", n, n, cp); 259 if (getnameinfo((struct sockaddr *)sin6, 260 sin6->sin6_len, 261 hbuf, sizeof(hbuf), NULL, 0, 262 niflag) != 0) { 263 cp = "?"; 264 } else 265 cp = hbuf; 266 if (vflag) 267 n = strlen(cp) < 17 ? 17 : strlen(cp); 268 else 269 n = 17; 270 printf("%-*.*s ", n, n, cp); 271 if (aflag) { 272 u_long multiaddr; 273 struct in6_multi inm; 274 struct sockaddr_in6 sin6; 275 276 multiaddr = (u_long) 277 ifaddr.in6.ia6_multiaddrs.lh_first; 278 while (multiaddr != 0) { 279 kread(multiaddr, (char *)&inm, 280 sizeof inm); 281 memset(&sin6, 0, sizeof(sin6)); 282 sin6.sin6_len = sizeof(struct sockaddr_in6); 283 sin6.sin6_family = AF_INET6; 284 sin6.sin6_addr = inm.in6m_addr; 285 #ifdef __KAME__ 286 if (IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) { 287 sin6.sin6_scope_id = 288 ntohs(*(u_int16_t *) 289 &sin6.sin6_addr.s6_addr[2]); 290 sin6.sin6_addr.s6_addr[2] = 0; 291 sin6.sin6_addr.s6_addr[3] = 0; 292 } 293 #endif 294 if (getnameinfo((struct sockaddr *)&sin6, 295 sin6.sin6_len, hbuf, 296 sizeof(hbuf), NULL, 0, 297 niflag) != 0) { 298 strlcpy(hbuf, "??", 299 sizeof(hbuf)); 300 } 301 cp = hbuf; 302 if (vflag) 303 n = strlen(cp) < 17 304 ? 17 : strlen(cp); 305 else 306 n = 17; 307 printf("\n%25s %-*.*s ", "", 308 n, n, cp); 309 multiaddr = 310 (u_long)inm.in6m_entry.le_next; 311 } 312 } 313 break; 314 #endif /*INET6*/ 315 #ifndef SMALL 316 case AF_APPLETALK: 317 printf("atalk:%-7.7s ", 318 atalk_print(sa,0x10)); 319 printf("%-17.17s ", atalk_print(sa,0x0b)); 320 break; 321 case AF_NS: 322 { 323 struct sockaddr_ns *sns = 324 (struct sockaddr_ns *)sa; 325 u_long net; 326 char netnum[10]; 327 328 *(union ns_net *)&net = sns->sns_addr.x_net; 329 (void)snprintf(netnum, sizeof(netnum), "%xH", 330 (u_int32_t)ntohl(net)); 331 upHex(netnum); 332 printf("ns:%-10s ", netnum); 333 printf("%-17.17s ", 334 ns_phost((struct sockaddr *)sns)); 335 } 336 break; 337 #endif 338 case AF_LINK: 339 printf("%-13.13s ", "<Link>"); 340 if (getnameinfo(sa, sa->sa_len, 341 hbuf, sizeof(hbuf), NULL, 0, 342 NI_NUMERICHOST) != 0) { 343 cp = "?"; 344 } else 345 cp = hbuf; 346 if (vflag) 347 n = strlen(cp) < 17 ? 17 : strlen(cp); 348 else 349 n = 17; 350 printf("%-*.*s ", n, n, cp); 351 break; 352 353 default: 354 m = printf("(%d)", sa->sa_family); 355 for (cp = sa->sa_len + (char *)sa; 356 --cp > sa->sa_data && (*cp == 0);) {} 357 n = cp - sa->sa_data + 1; 358 cp = sa->sa_data; 359 while (--n >= 0) 360 m += printf(hexfmt, *cp++ & 0xff, 361 n > 0 ? hexsep : ' '); 362 m = 32 - m; 363 while (m-- > 0) 364 putchar(' '); 365 break; 366 } 367 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 368 } 369 if (bflag) { 370 printf("%10llu %10llu", 371 (unsigned long long)ifnet.if_ibytes, 372 (unsigned long long)ifnet.if_obytes); 373 } else { 374 printf("%8llu %5llu %8llu %5llu %5llu", 375 (unsigned long long)ifnet.if_ipackets, 376 (unsigned long long)ifnet.if_ierrors, 377 (unsigned long long)ifnet.if_opackets, 378 (unsigned long long)ifnet.if_oerrors, 379 (unsigned long long)ifnet.if_collisions); 380 } 381 if (tflag) 382 printf(" %4d", ifnet.if_timer); 383 if (dflag) 384 printf(" %5d", ifnet.if_snd.ifq_drops); 385 putchar('\n'); 386 } 387 } 388 389 #define MAXIF 100 390 struct iftot { 391 char ift_name[IFNAMSIZ]; /* interface name */ 392 u_quad_t ift_ip; /* input packets */ 393 u_quad_t ift_ib; /* input bytes */ 394 u_quad_t ift_ie; /* input errors */ 395 u_quad_t ift_op; /* output packets */ 396 u_quad_t ift_ob; /* output bytes */ 397 u_quad_t ift_oe; /* output errors */ 398 u_quad_t ift_co; /* collisions */ 399 int ift_dr; /* drops */ 400 } iftot[MAXIF]; 401 402 u_char signalled; /* set if alarm goes off "early" */ 403 404 /* 405 * Print a running summary of interface statistics. 406 * Repeat display every interval seconds, showing statistics 407 * collected over that interval. Assumes that interval is non-zero. 408 * First line printed at top of screen is always cumulative. 409 */ 410 static void 411 sidewaysintpr(interval, off) 412 unsigned interval; 413 u_long off; 414 { 415 struct ifnet ifnet; 416 u_long firstifnet; 417 struct iftot *ip, *total; 418 int line; 419 struct iftot *lastif, *sum, *interesting; 420 struct ifnet_head ifhead; /* TAILQ_HEAD */ 421 int oldmask; 422 423 /* 424 * Find the pointer to the first ifnet structure. Replace 425 * the pointer to the TAILQ_HEAD with the actual pointer 426 * to the first list element. 427 */ 428 if (kread(off, (char *)&ifhead, sizeof ifhead)) 429 return; 430 firstifnet = (u_long)ifhead.tqh_first; 431 432 lastif = iftot; 433 sum = iftot + MAXIF - 1; 434 total = sum - 1; 435 interesting = (interface == NULL) ? iftot : NULL; 436 for (off = firstifnet, ip = iftot; off;) { 437 if (kread(off, (char *)&ifnet, sizeof ifnet)) 438 break; 439 memset(ip->ift_name, 0, sizeof(ip->ift_name)); 440 snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname); 441 if (interface && strcmp(ifnet.if_xname, interface) == 0) 442 interesting = ip; 443 ip++; 444 if (ip >= iftot + MAXIF - 2) 445 break; 446 off = (u_long)ifnet.if_list.tqe_next; 447 } 448 if (interesting == NULL) { 449 fprintf(stderr, "%s: %s: unknown interface\n", 450 getprogname(), interface); 451 exit(1); 452 } 453 lastif = ip; 454 455 (void)signal(SIGALRM, catchalarm); 456 signalled = NO; 457 (void)alarm(interval); 458 banner: 459 if (bflag) 460 printf("%7.7s in %8.8s %6.6s out %5.5s", 461 interesting->ift_name, " ", 462 interesting->ift_name, " "); 463 else 464 printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s", 465 interesting->ift_name, " ", 466 interesting->ift_name, " ", " "); 467 if (dflag) 468 printf(" %5.5s", " "); 469 if (lastif - iftot > 0) { 470 if (bflag) 471 printf(" %7.7s in %8.8s %6.6s out %5.5s", 472 "total", " ", "total", " "); 473 else 474 printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s", 475 "total", " ", "total", " ", " "); 476 if (dflag) 477 printf(" %5.5s", " "); 478 } 479 for (ip = iftot; ip < iftot + MAXIF; ip++) { 480 ip->ift_ip = 0; 481 ip->ift_ib = 0; 482 ip->ift_ie = 0; 483 ip->ift_op = 0; 484 ip->ift_ob = 0; 485 ip->ift_oe = 0; 486 ip->ift_co = 0; 487 ip->ift_dr = 0; 488 } 489 putchar('\n'); 490 if (bflag) 491 printf("%10.10s %8.8s %10.10s %5.5s", 492 "bytes", " ", "bytes", " "); 493 else 494 printf("%8.8s %5.5s %8.8s %5.5s %5.5s", 495 "packets", "errs", "packets", "errs", "colls"); 496 if (dflag) 497 printf(" %5.5s", "drops"); 498 if (lastif - iftot > 0) { 499 if (bflag) 500 printf(" %10.10s %8.8s %10.10s %5.5s", 501 "bytes", " ", "bytes", " "); 502 else 503 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 504 "packets", "errs", "packets", "errs", "colls"); 505 if (dflag) 506 printf(" %5.5s", "drops"); 507 } 508 putchar('\n'); 509 fflush(stdout); 510 line = 0; 511 loop: 512 sum->ift_ip = 0; 513 sum->ift_ib = 0; 514 sum->ift_ie = 0; 515 sum->ift_op = 0; 516 sum->ift_ob = 0; 517 sum->ift_oe = 0; 518 sum->ift_co = 0; 519 sum->ift_dr = 0; 520 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 521 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 522 off = 0; 523 continue; 524 } 525 if (ip == interesting) { 526 if (bflag) { 527 printf("%10llu %8.8s %10llu %5.5s", 528 (unsigned long long)(ifnet.if_ibytes - 529 ip->ift_ib), " ", 530 (unsigned long long)(ifnet.if_obytes - 531 ip->ift_ob), " "); 532 } else { 533 printf("%8llu %5llu %8llu %5llu %5llu", 534 (unsigned long long) 535 (ifnet.if_ipackets - ip->ift_ip), 536 (unsigned long long) 537 (ifnet.if_ierrors - ip->ift_ie), 538 (unsigned long long) 539 (ifnet.if_opackets - ip->ift_op), 540 (unsigned long long) 541 (ifnet.if_oerrors - ip->ift_oe), 542 (unsigned long long) 543 (ifnet.if_collisions - ip->ift_co)); 544 } 545 if (dflag) 546 printf(" %5llu", 547 (unsigned long long) 548 (ifnet.if_snd.ifq_drops - ip->ift_dr)); 549 } 550 ip->ift_ip = ifnet.if_ipackets; 551 ip->ift_ib = ifnet.if_ibytes; 552 ip->ift_ie = ifnet.if_ierrors; 553 ip->ift_op = ifnet.if_opackets; 554 ip->ift_ob = ifnet.if_obytes; 555 ip->ift_oe = ifnet.if_oerrors; 556 ip->ift_co = ifnet.if_collisions; 557 ip->ift_dr = ifnet.if_snd.ifq_drops; 558 sum->ift_ip += ip->ift_ip; 559 sum->ift_ib += ip->ift_ib; 560 sum->ift_ie += ip->ift_ie; 561 sum->ift_op += ip->ift_op; 562 sum->ift_ob += ip->ift_ob; 563 sum->ift_oe += ip->ift_oe; 564 sum->ift_co += ip->ift_co; 565 sum->ift_dr += ip->ift_dr; 566 off = (u_long)ifnet.if_list.tqe_next; 567 } 568 if (lastif - iftot > 0) { 569 if (bflag) { 570 printf(" %10llu %8.8s %10llu %5.5s", 571 (unsigned long long) 572 (sum->ift_ib - total->ift_ib), " ", 573 (unsigned long long) 574 (sum->ift_ob - total->ift_ob), " "); 575 } else { 576 printf(" %8llu %5llu %8llu %5llu %5llu", 577 (unsigned long long) 578 (sum->ift_ip - total->ift_ip), 579 (unsigned long long) 580 (sum->ift_ie - total->ift_ie), 581 (unsigned long long) 582 (sum->ift_op - total->ift_op), 583 (unsigned long long) 584 (sum->ift_oe - total->ift_oe), 585 (unsigned long long) 586 (sum->ift_co - total->ift_co)); 587 } 588 if (dflag) 589 printf(" %5llu", 590 (unsigned long long)(sum->ift_dr - total->ift_dr)); 591 } 592 *total = *sum; 593 putchar('\n'); 594 fflush(stdout); 595 line++; 596 oldmask = sigblock(sigmask(SIGALRM)); 597 if (! signalled) { 598 sigpause(0); 599 } 600 sigsetmask(oldmask); 601 signalled = NO; 602 (void)alarm(interval); 603 if (line == 21) 604 goto banner; 605 goto loop; 606 /*NOTREACHED*/ 607 } 608 609 /* 610 * Called if an interval expires before sidewaysintpr has completed a loop. 611 * Sets a flag to not wait for the alarm. 612 */ 613 static void 614 catchalarm(signo) 615 int signo; 616 { 617 618 signalled = YES; 619 } 620
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