if.c revision 1.36
1 /* $NetBSD: if.c,v 1.36 2000/01/25 15:56:55 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 1.36 2000/01/25 15:56:55 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 cp = netname(ifaddr.in.ia_subnet, 210 ifaddr.in.ia_subnetmask); 211 if (vflag) 212 n = strlen(cp) < 13 ? 13 : strlen(cp); 213 else 214 n = 13; 215 printf("%-*.*s ", n, n, cp); 216 #endif 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 cp = netname6(&ifaddr.in6.ia_addr, 244 &ifaddr.in6.ia_prefixmask.sin6_addr); 245 if (vflag) 246 n = strlen(cp) < 13 ? 13 : strlen(cp); 247 else 248 n = 13; 249 printf("%-*.*s ", n, n, cp); 250 #if 0 /* KAME_SCOPEID: don't do it twice */ 251 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 252 sin6->sin6_scope_id = 253 ntohs(*(u_int16_t *) 254 &sin6->sin6_addr.s6_addr[2]); 255 sin6->sin6_addr.s6_addr[2] = 0; 256 sin6->sin6_addr.s6_addr[3] = 0; 257 } 258 #endif 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; 274 275 multiaddr = (u_long) 276 ifaddr.in6.ia6_multiaddrs.lh_first; 277 while (multiaddr != 0) { 278 kread(multiaddr, (char *)&inm, 279 sizeof inm); 280 inet_ntop(AF_INET6, &inm.in6m_addr, 281 hbuf, sizeof(hbuf)); 282 cp = hbuf; 283 if (vflag) 284 n = strlen(cp) < 17 285 ? 17 : strlen(cp); 286 else 287 n = 17; 288 printf("\n%25s %-*.*s ", "", 289 n, n, cp); 290 multiaddr = 291 (u_long)inm.in6m_entry.le_next; 292 } 293 } 294 break; 295 #endif /*INET6*/ 296 #ifndef SMALL 297 case AF_APPLETALK: 298 printf("atalk:%-7.7s ", 299 atalk_print(sa,0x10)); 300 printf("%-17.17s ", atalk_print(sa,0x0b)); 301 break; 302 case AF_NS: 303 { 304 struct sockaddr_ns *sns = 305 (struct sockaddr_ns *)sa; 306 u_long net; 307 char netnum[8]; 308 309 *(union ns_net *)&net = sns->sns_addr.x_net; 310 (void)sprintf(netnum, "%xH", 311 (u_int32_t)ntohl(net)); 312 upHex(netnum); 313 printf("ns:%-10s ", netnum); 314 printf("%-17.17s ", 315 ns_phost((struct sockaddr *)sns)); 316 } 317 break; 318 #endif 319 case AF_LINK: 320 { 321 struct sockaddr_dl *sdl = 322 (struct sockaddr_dl *)sa; 323 cp = (char *)LLADDR(sdl); 324 if (sdl->sdl_type == IFT_FDDI 325 || sdl->sdl_type == IFT_ETHER) 326 hexsep = ':', hexfmt = "%02x%c"; 327 n = sdl->sdl_alen; 328 } 329 m = printf("%-13.13s ", "<Link>"); 330 goto hexprint; 331 default: 332 m = printf("(%d)", sa->sa_family); 333 for (cp = sa->sa_len + (char *)sa; 334 --cp > sa->sa_data && (*cp == 0);) {} 335 n = cp - sa->sa_data + 1; 336 cp = sa->sa_data; 337 hexprint: 338 while (--n >= 0) 339 m += printf(hexfmt, *cp++ & 0xff, 340 n > 0 ? hexsep : ' '); 341 m = 32 - m; 342 while (m-- > 0) 343 putchar(' '); 344 break; 345 } 346 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 347 } 348 if (bflag) { 349 printf("%10llu %10llu", 350 (unsigned long long)ifnet.if_ibytes, 351 (unsigned long long)ifnet.if_obytes); 352 } else { 353 printf("%8llu %5llu %8llu %5llu %5llu", 354 (unsigned long long)ifnet.if_ipackets, 355 (unsigned long long)ifnet.if_ierrors, 356 (unsigned long long)ifnet.if_opackets, 357 (unsigned long long)ifnet.if_oerrors, 358 (unsigned long long)ifnet.if_collisions); 359 } 360 if (tflag) 361 printf(" %4d", ifnet.if_timer); 362 if (dflag) 363 printf(" %5d", ifnet.if_snd.ifq_drops); 364 putchar('\n'); 365 } 366 } 367 368 #define MAXIF 100 369 struct iftot { 370 char ift_name[IFNAMSIZ]; /* interface name */ 371 u_long ift_ip; /* input packets */ 372 u_long ift_ib; /* input bytes */ 373 u_long ift_ie; /* input errors */ 374 u_long ift_op; /* output packets */ 375 u_long ift_ob; /* output bytes */ 376 u_long ift_oe; /* output errors */ 377 u_long ift_co; /* collisions */ 378 int ift_dr; /* drops */ 379 } iftot[MAXIF]; 380 381 u_char signalled; /* set if alarm goes off "early" */ 382 383 /* 384 * Print a running summary of interface statistics. 385 * Repeat display every interval seconds, showing statistics 386 * collected over that interval. Assumes that interval is non-zero. 387 * First line printed at top of screen is always cumulative. 388 */ 389 static void 390 sidewaysintpr(interval, off) 391 unsigned interval; 392 u_long off; 393 { 394 struct ifnet ifnet; 395 u_long firstifnet; 396 struct iftot *ip, *total; 397 int line; 398 struct iftot *lastif, *sum, *interesting; 399 struct ifnet_head ifhead; /* TAILQ_HEAD */ 400 int oldmask; 401 402 /* 403 * Find the pointer to the first ifnet structure. Replace 404 * the pointer to the TAILQ_HEAD with the actual pointer 405 * to the first list element. 406 */ 407 if (kread(off, (char *)&ifhead, sizeof ifhead)) 408 return; 409 firstifnet = (u_long)ifhead.tqh_first; 410 411 lastif = iftot; 412 sum = iftot + MAXIF - 1; 413 total = sum - 1; 414 interesting = (interface == NULL) ? iftot : NULL; 415 for (off = firstifnet, ip = iftot; off;) { 416 if (kread(off, (char *)&ifnet, sizeof ifnet)) 417 break; 418 memset(ip->ift_name, 0, sizeof(ip->ift_name)); 419 snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname); 420 if (interface && strcmp(ifnet.if_xname, interface) == 0) 421 interesting = ip; 422 ip++; 423 if (ip >= iftot + MAXIF - 2) 424 break; 425 off = (u_long)ifnet.if_list.tqe_next; 426 } 427 if (interesting == NULL) { 428 fprintf(stderr, "%s: %s: unknown interface\n", 429 __progname, interface); 430 exit(1); 431 } 432 lastif = ip; 433 434 (void)signal(SIGALRM, catchalarm); 435 signalled = NO; 436 (void)alarm(interval); 437 banner: 438 if (bflag) 439 printf("%7.7s in %8.8s %6.6s out %5.5s", 440 interesting->ift_name, " ", 441 interesting->ift_name, " "); 442 else 443 printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s", 444 interesting->ift_name, " ", 445 interesting->ift_name, " ", " "); 446 if (dflag) 447 printf(" %5.5s", " "); 448 if (lastif - iftot > 0) { 449 if (bflag) 450 printf(" %7.7s in %8.8s %6.6s out %5.5s", 451 "total", " ", "total", " "); 452 else 453 printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s", 454 "total", " ", "total", " ", " "); 455 if (dflag) 456 printf(" %5.5s", " "); 457 } 458 for (ip = iftot; ip < iftot + MAXIF; ip++) { 459 ip->ift_ip = 0; 460 ip->ift_ib = 0; 461 ip->ift_ie = 0; 462 ip->ift_op = 0; 463 ip->ift_ob = 0; 464 ip->ift_oe = 0; 465 ip->ift_co = 0; 466 ip->ift_dr = 0; 467 } 468 putchar('\n'); 469 if (bflag) 470 printf("%10.10s %8.8s %10.10s %5.5s", 471 "bytes", " ", "bytes", " "); 472 else 473 printf("%8.8s %5.5s %8.8s %5.5s %5.5s", 474 "packets", "errs", "packets", "errs", "colls"); 475 if (dflag) 476 printf(" %5.5s", "drops"); 477 if (lastif - iftot > 0) { 478 if (bflag) 479 printf(" %10.10s %8.8s %10.10s %5.5s", 480 "bytes", " ", "bytes", " "); 481 else 482 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 483 "packets", "errs", "packets", "errs", "colls"); 484 if (dflag) 485 printf(" %5.5s", "drops"); 486 } 487 putchar('\n'); 488 fflush(stdout); 489 line = 0; 490 loop: 491 sum->ift_ip = 0; 492 sum->ift_ib = 0; 493 sum->ift_ie = 0; 494 sum->ift_op = 0; 495 sum->ift_ob = 0; 496 sum->ift_oe = 0; 497 sum->ift_co = 0; 498 sum->ift_dr = 0; 499 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 500 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 501 off = 0; 502 continue; 503 } 504 if (ip == interesting) { 505 if (bflag) { 506 printf("%10llu %8.8s %10llu %5.5s", 507 (unsigned long long)(ifnet.if_ibytes - 508 ip->ift_ib), " ", 509 (unsigned long long)(ifnet.if_obytes - 510 ip->ift_ob), " "); 511 } else { 512 printf("%8llu %5llu %8llu %5llu %5llu", 513 (unsigned long long) 514 (ifnet.if_ipackets - ip->ift_ip), 515 (unsigned long long) 516 (ifnet.if_ierrors - ip->ift_ie), 517 (unsigned long long) 518 (ifnet.if_opackets - ip->ift_op), 519 (unsigned long long) 520 (ifnet.if_oerrors - ip->ift_oe), 521 (unsigned long long) 522 (ifnet.if_collisions - ip->ift_co)); 523 } 524 if (dflag) 525 printf(" %5llu", 526 (unsigned long long) 527 (ifnet.if_snd.ifq_drops - ip->ift_dr)); 528 } 529 ip->ift_ip = ifnet.if_ipackets; 530 ip->ift_ib = ifnet.if_ibytes; 531 ip->ift_ie = ifnet.if_ierrors; 532 ip->ift_op = ifnet.if_opackets; 533 ip->ift_ob = ifnet.if_obytes; 534 ip->ift_oe = ifnet.if_oerrors; 535 ip->ift_co = ifnet.if_collisions; 536 ip->ift_dr = ifnet.if_snd.ifq_drops; 537 sum->ift_ip += ip->ift_ip; 538 sum->ift_ib += ip->ift_ib; 539 sum->ift_ie += ip->ift_ie; 540 sum->ift_op += ip->ift_op; 541 sum->ift_ob += ip->ift_ob; 542 sum->ift_oe += ip->ift_oe; 543 sum->ift_co += ip->ift_co; 544 sum->ift_dr += ip->ift_dr; 545 off = (u_long)ifnet.if_list.tqe_next; 546 } 547 if (lastif - iftot > 0) { 548 if (bflag) { 549 printf(" %10llu %8.8s %10llu %5.5s", 550 (unsigned long long) 551 (sum->ift_ib - total->ift_ib), " ", 552 (unsigned long long) 553 (sum->ift_ob - total->ift_ob), " "); 554 } else { 555 printf(" %8llu %5llu %8llu %5llu %5llu", 556 (unsigned long long) 557 (sum->ift_ip - total->ift_ip), 558 (unsigned long long) 559 (sum->ift_ie - total->ift_ie), 560 (unsigned long long) 561 (sum->ift_op - total->ift_op), 562 (unsigned long long) 563 (sum->ift_oe - total->ift_oe), 564 (unsigned long long) 565 (sum->ift_co - total->ift_co)); 566 } 567 if (dflag) 568 printf(" %5llu", 569 (unsigned long long)(sum->ift_dr - total->ift_dr)); 570 } 571 *total = *sum; 572 putchar('\n'); 573 fflush(stdout); 574 line++; 575 oldmask = sigblock(sigmask(SIGALRM)); 576 if (! signalled) { 577 sigpause(0); 578 } 579 sigsetmask(oldmask); 580 signalled = NO; 581 (void)alarm(interval); 582 if (line == 21) 583 goto banner; 584 goto loop; 585 /*NOTREACHED*/ 586 } 587 588 /* 589 * Called if an interval expires before sidewaysintpr has completed a loop. 590 * Sets a flag to not wait for the alarm. 591 */ 592 static void 593 catchalarm(signo) 594 int signo; 595 { 596 597 signalled = YES; 598 } 599
Indexes created Thu Sep 25 16:09:42 GMT 2025