if.c revision 1.35
1 /* $NetBSD: if.c,v 1.35 2000/01/17 18:24:37 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 39 static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94"; 40 #else 41 __RCSID("$NetBSD: if.c,v 1.35 2000/01/17 18:24:37 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 <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 71 static void sidewaysintpr __P((u_int, u_long)); 72 static void catchalarm __P((int)); 73 74 #ifdef INET6 75 char *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 */ 83 void 84 intpr(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 printf("%-13.13s ", netname(in.s_addr, 207 ifaddr.in.ia_subnetmask)); 208 #else 209 printf("%-13.13s ", 210 netname(ifaddr.in.ia_subnet, 211 ifaddr.in.ia_subnetmask)); 212 #endif 213 printf("%-17.17s ", 214 routename(sin->sin_addr.s_addr)); 215 216 if (aflag) { 217 u_long multiaddr; 218 struct in_multi inm; 219 220 multiaddr = (u_long) 221 ifaddr.in.ia_multiaddrs.lh_first; 222 while (multiaddr != 0) { 223 kread(multiaddr, (char *)&inm, 224 sizeof inm); 225 printf("\n%25s %-17.17s ", "", 226 routename( 227 inm.inm_addr.s_addr)); 228 multiaddr = 229 (u_long)inm.inm_list.le_next; 230 } 231 } 232 break; 233 #ifdef INET6 234 case AF_INET6: 235 sin6 = (struct sockaddr_in6 *)sa; 236 cp = netname6(&ifaddr.in6.ia_addr, 237 &ifaddr.in6.ia_prefixmask.sin6_addr); 238 if (vflag) 239 n = strlen(cp) < 13 ? 13 : strlen(cp); 240 else 241 n = 13; 242 printf("%-*.*s ", n, n, cp); 243 #if 0 /* KAME_SCOPEID: don't do it twice */ 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 sin6->sin6_addr.s6_addr[2] = 0; 249 sin6->sin6_addr.s6_addr[3] = 0; 250 } 251 #endif 252 if (getnameinfo((struct sockaddr *)sin6, 253 sin6->sin6_len, 254 hbuf, sizeof(hbuf), NULL, 0, 255 niflag) != 0) { 256 cp = "?"; 257 } else 258 cp = hbuf; 259 if (vflag) 260 n = strlen(cp) < 17 ? 17 : strlen(cp); 261 else 262 n = 17; 263 printf("%-*.*s ", n, n, cp); 264 if (aflag) { 265 u_long multiaddr; 266 struct in6_multi inm; 267 268 multiaddr = (u_long) 269 ifaddr.in6.ia6_multiaddrs.lh_first; 270 while (multiaddr != 0) { 271 kread(multiaddr, (char *)&inm, 272 sizeof inm); 273 inet_ntop(AF_INET6, &inm.in6m_addr, 274 hbuf, sizeof(hbuf)); 275 cp = hbuf; 276 if (vflag) 277 n = strlen(cp) < 17 278 ? 17 : strlen(cp); 279 else 280 n = 17; 281 printf("\n%25s %-*.*s ", "", 282 n, n, cp); 283 multiaddr = 284 (u_long)inm.in6m_entry.le_next; 285 } 286 } 287 break; 288 #endif /*INET6*/ 289 #ifndef SMALL 290 case AF_APPLETALK: 291 printf("atalk:%-7.7s ", 292 atalk_print(sa,0x10)); 293 printf("%-17.17s ", atalk_print(sa,0x0b)); 294 break; 295 case AF_NS: 296 { 297 struct sockaddr_ns *sns = 298 (struct sockaddr_ns *)sa; 299 u_long net; 300 char netnum[8]; 301 302 *(union ns_net *)&net = sns->sns_addr.x_net; 303 (void)sprintf(netnum, "%xH", 304 (u_int32_t)ntohl(net)); 305 upHex(netnum); 306 printf("ns:%-10s ", netnum); 307 printf("%-17.17s ", 308 ns_phost((struct sockaddr *)sns)); 309 } 310 break; 311 #endif 312 case AF_LINK: 313 { 314 struct sockaddr_dl *sdl = 315 (struct sockaddr_dl *)sa; 316 cp = (char *)LLADDR(sdl); 317 if (sdl->sdl_type == IFT_FDDI 318 || sdl->sdl_type == IFT_ETHER) 319 hexsep = ':', hexfmt = "%02x%c"; 320 n = sdl->sdl_alen; 321 } 322 m = printf("%-13.13s ", "<Link>"); 323 goto hexprint; 324 default: 325 m = printf("(%d)", sa->sa_family); 326 for (cp = sa->sa_len + (char *)sa; 327 --cp > sa->sa_data && (*cp == 0);) {} 328 n = cp - sa->sa_data + 1; 329 cp = sa->sa_data; 330 hexprint: 331 while (--n >= 0) 332 m += printf(hexfmt, *cp++ & 0xff, 333 n > 0 ? hexsep : ' '); 334 m = 32 - m; 335 while (m-- > 0) 336 putchar(' '); 337 break; 338 } 339 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 340 } 341 if (bflag) { 342 printf("%10llu %10llu", 343 (unsigned long long)ifnet.if_ibytes, 344 (unsigned long long)ifnet.if_obytes); 345 } else { 346 printf("%8llu %5llu %8llu %5llu %5llu", 347 (unsigned long long)ifnet.if_ipackets, 348 (unsigned long long)ifnet.if_ierrors, 349 (unsigned long long)ifnet.if_opackets, 350 (unsigned long long)ifnet.if_oerrors, 351 (unsigned long long)ifnet.if_collisions); 352 } 353 if (tflag) 354 printf(" %4d", ifnet.if_timer); 355 if (dflag) 356 printf(" %5d", ifnet.if_snd.ifq_drops); 357 putchar('\n'); 358 } 359 } 360 361 #define MAXIF 100 362 struct iftot { 363 char ift_name[IFNAMSIZ]; /* interface name */ 364 u_long ift_ip; /* input packets */ 365 u_long ift_ib; /* input bytes */ 366 u_long ift_ie; /* input errors */ 367 u_long ift_op; /* output packets */ 368 u_long ift_ob; /* output bytes */ 369 u_long ift_oe; /* output errors */ 370 u_long ift_co; /* collisions */ 371 int ift_dr; /* drops */ 372 } iftot[MAXIF]; 373 374 u_char signalled; /* set if alarm goes off "early" */ 375 376 /* 377 * Print a running summary of interface statistics. 378 * Repeat display every interval seconds, showing statistics 379 * collected over that interval. Assumes that interval is non-zero. 380 * First line printed at top of screen is always cumulative. 381 */ 382 static void 383 sidewaysintpr(interval, off) 384 unsigned interval; 385 u_long off; 386 { 387 struct ifnet ifnet; 388 u_long firstifnet; 389 struct iftot *ip, *total; 390 int line; 391 struct iftot *lastif, *sum, *interesting; 392 struct ifnet_head ifhead; /* TAILQ_HEAD */ 393 int oldmask; 394 395 /* 396 * Find the pointer to the first ifnet structure. Replace 397 * the pointer to the TAILQ_HEAD with the actual pointer 398 * to the first list element. 399 */ 400 if (kread(off, (char *)&ifhead, sizeof ifhead)) 401 return; 402 firstifnet = (u_long)ifhead.tqh_first; 403 404 lastif = iftot; 405 sum = iftot + MAXIF - 1; 406 total = sum - 1; 407 interesting = (interface == NULL) ? iftot : NULL; 408 for (off = firstifnet, ip = iftot; off;) { 409 if (kread(off, (char *)&ifnet, sizeof ifnet)) 410 break; 411 memset(ip->ift_name, 0, sizeof(ip->ift_name)); 412 snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname); 413 if (interface && strcmp(ifnet.if_xname, interface) == 0) 414 interesting = ip; 415 ip++; 416 if (ip >= iftot + MAXIF - 2) 417 break; 418 off = (u_long)ifnet.if_list.tqe_next; 419 } 420 if (interesting == NULL) { 421 fprintf(stderr, "%s: %s: unknown interface\n", 422 __progname, interface); 423 exit(1); 424 } 425 lastif = ip; 426 427 (void)signal(SIGALRM, catchalarm); 428 signalled = NO; 429 (void)alarm(interval); 430 banner: 431 if (bflag) 432 printf("%7.7s in %8.8s %6.6s out %5.5s", 433 interesting->ift_name, " ", 434 interesting->ift_name, " "); 435 else 436 printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s", 437 interesting->ift_name, " ", 438 interesting->ift_name, " ", " "); 439 if (dflag) 440 printf(" %5.5s", " "); 441 if (lastif - iftot > 0) { 442 if (bflag) 443 printf(" %7.7s in %8.8s %6.6s out %5.5s", 444 "total", " ", "total", " "); 445 else 446 printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s", 447 "total", " ", "total", " ", " "); 448 if (dflag) 449 printf(" %5.5s", " "); 450 } 451 for (ip = iftot; ip < iftot + MAXIF; ip++) { 452 ip->ift_ip = 0; 453 ip->ift_ib = 0; 454 ip->ift_ie = 0; 455 ip->ift_op = 0; 456 ip->ift_ob = 0; 457 ip->ift_oe = 0; 458 ip->ift_co = 0; 459 ip->ift_dr = 0; 460 } 461 putchar('\n'); 462 if (bflag) 463 printf("%10.10s %8.8s %10.10s %5.5s", 464 "bytes", " ", "bytes", " "); 465 else 466 printf("%8.8s %5.5s %8.8s %5.5s %5.5s", 467 "packets", "errs", "packets", "errs", "colls"); 468 if (dflag) 469 printf(" %5.5s", "drops"); 470 if (lastif - iftot > 0) { 471 if (bflag) 472 printf(" %10.10s %8.8s %10.10s %5.5s", 473 "bytes", " ", "bytes", " "); 474 else 475 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 476 "packets", "errs", "packets", "errs", "colls"); 477 if (dflag) 478 printf(" %5.5s", "drops"); 479 } 480 putchar('\n'); 481 fflush(stdout); 482 line = 0; 483 loop: 484 sum->ift_ip = 0; 485 sum->ift_ib = 0; 486 sum->ift_ie = 0; 487 sum->ift_op = 0; 488 sum->ift_ob = 0; 489 sum->ift_oe = 0; 490 sum->ift_co = 0; 491 sum->ift_dr = 0; 492 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 493 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 494 off = 0; 495 continue; 496 } 497 if (ip == interesting) { 498 if (bflag) { 499 printf("%10llu %8.8s %10llu %5.5s", 500 (unsigned long long)(ifnet.if_ibytes - 501 ip->ift_ib), " ", 502 (unsigned long long)(ifnet.if_obytes - 503 ip->ift_ob), " "); 504 } else { 505 printf("%8llu %5llu %8llu %5llu %5llu", 506 (unsigned long long) 507 (ifnet.if_ipackets - ip->ift_ip), 508 (unsigned long long) 509 (ifnet.if_ierrors - ip->ift_ie), 510 (unsigned long long) 511 (ifnet.if_opackets - ip->ift_op), 512 (unsigned long long) 513 (ifnet.if_oerrors - ip->ift_oe), 514 (unsigned long long) 515 (ifnet.if_collisions - ip->ift_co)); 516 } 517 if (dflag) 518 printf(" %5llu", 519 (unsigned long long) 520 (ifnet.if_snd.ifq_drops - ip->ift_dr)); 521 } 522 ip->ift_ip = ifnet.if_ipackets; 523 ip->ift_ib = ifnet.if_ibytes; 524 ip->ift_ie = ifnet.if_ierrors; 525 ip->ift_op = ifnet.if_opackets; 526 ip->ift_ob = ifnet.if_obytes; 527 ip->ift_oe = ifnet.if_oerrors; 528 ip->ift_co = ifnet.if_collisions; 529 ip->ift_dr = ifnet.if_snd.ifq_drops; 530 sum->ift_ip += ip->ift_ip; 531 sum->ift_ib += ip->ift_ib; 532 sum->ift_ie += ip->ift_ie; 533 sum->ift_op += ip->ift_op; 534 sum->ift_ob += ip->ift_ob; 535 sum->ift_oe += ip->ift_oe; 536 sum->ift_co += ip->ift_co; 537 sum->ift_dr += ip->ift_dr; 538 off = (u_long)ifnet.if_list.tqe_next; 539 } 540 if (lastif - iftot > 0) { 541 if (bflag) { 542 printf(" %10llu %8.8s %10llu %5.5s", 543 (unsigned long long) 544 (sum->ift_ib - total->ift_ib), " ", 545 (unsigned long long) 546 (sum->ift_ob - total->ift_ob), " "); 547 } else { 548 printf(" %8llu %5llu %8llu %5llu %5llu", 549 (unsigned long long) 550 (sum->ift_ip - total->ift_ip), 551 (unsigned long long) 552 (sum->ift_ie - total->ift_ie), 553 (unsigned long long) 554 (sum->ift_op - total->ift_op), 555 (unsigned long long) 556 (sum->ift_oe - total->ift_oe), 557 (unsigned long long) 558 (sum->ift_co - total->ift_co)); 559 } 560 if (dflag) 561 printf(" %5llu", 562 (unsigned long long)(sum->ift_dr - total->ift_dr)); 563 } 564 *total = *sum; 565 putchar('\n'); 566 fflush(stdout); 567 line++; 568 oldmask = sigblock(sigmask(SIGALRM)); 569 if (! signalled) { 570 sigpause(0); 571 } 572 sigsetmask(oldmask); 573 signalled = NO; 574 (void)alarm(interval); 575 if (line == 21) 576 goto banner; 577 goto loop; 578 /*NOTREACHED*/ 579 } 580 581 /* 582 * Called if an interval expires before sidewaysintpr has completed a loop. 583 * Sets a flag to not wait for the alarm. 584 */ 585 static void 586 catchalarm(signo) 587 int signo; 588 { 589 590 signalled = YES; 591 } 592
Indexes created Thu Sep 25 16:09:42 GMT 2025