1 /* 2 * Copyright (c) 1983, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)if.c 8.3 (Berkeley) 4/28/95 34 * $FreeBSD: src/usr.bin/netstat/if.c,v 1.32.2.9 2001/09/17 14:35:46 ru Exp $ 35 */ 36 37 #define _KERNEL_STRUCTURES 38 #include <sys/param.h> 39 #include <sys/protosw.h> 40 #include <sys/socket.h> 41 #include <sys/sysctl.h> 42 #include <sys/time.h> 43 44 #include <net/if.h> 45 #include <net/if_var.h> 46 #include <net/if_dl.h> 47 #include <net/if_types.h> 48 #include <net/ethernet.h> 49 #include <netinet/in.h> 50 #include <netinet/in_var.h> 51 #include <netproto/ipx/ipx.h> 52 #include <netproto/ipx/ipx_if.h> 53 #ifdef ISO 54 #include <netiso/iso.h> 55 #include <netiso/iso_var.h> 56 #endif 57 #include <arpa/inet.h> 58 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "netstat.h" 66 67 #define YES 1 68 #define NO 0 69 70 static void sidewaysintpr (u_int, u_long); 71 static void catchalarm (int); 72 73 #ifdef INET6 74 static char ntop_buf[INET6_ADDRSTRLEN]; /* for inet_ntop() */ 75 #endif 76 77 78 /* 79 * Display a formatted value, or a '-' in the same space. 80 */ 81 static void 82 show_stat(const char *fmt, int width, u_long value, short showvalue) 83 { 84 char newfmt[32]; 85 86 /* Construct the format string */ 87 if (showvalue) { 88 sprintf(newfmt, "%%%d%s", width, fmt); 89 printf(newfmt, value); 90 } else { 91 sprintf(newfmt, "%%%ds", width); 92 printf(newfmt, "-"); 93 } 94 } 95 96 97 98 /* 99 * Print a description of the network interfaces. 100 */ 101 void 102 intpr(int interval1, u_long ifnetaddr, void (*pfunc)(char *)) 103 { 104 struct ifnet ifnet; 105 struct ifaddr_container ifac; 106 struct ifnethead ifnethead; 107 union { 108 struct ifaddr ifa; 109 struct in_ifaddr in; 110 #ifdef INET6 111 struct in6_ifaddr in6; 112 #endif 113 struct ipx_ifaddr ipx; 114 #ifdef ISO 115 struct iso_ifaddr iso; 116 #endif 117 } ifaddr; 118 u_long ifaddraddr; 119 u_long ifaddrcont_addr; 120 u_long ifaddrfound; 121 u_long opackets; 122 u_long ipackets; 123 u_long obytes; 124 u_long ibytes; 125 u_long oerrors; 126 u_long ierrors; 127 u_long collisions; 128 short timer; 129 int drops; 130 struct sockaddr *sa = NULL; 131 char name[IFNAMSIZ]; 132 short network_layer; 133 short link_layer; 134 135 if (ifnetaddr == 0) { 136 printf("ifnet: symbol not defined\n"); 137 return; 138 } 139 if (interval1) { 140 sidewaysintpr((unsigned)interval1, ifnetaddr); 141 return; 142 } 143 if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead)) 144 return; 145 ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead); 146 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 147 return; 148 149 if (!pfunc) { 150 printf("%-7.7s %-5.5s %-13.13s %-15.15s %8.8s %5.5s", 151 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs"); 152 if (bflag) 153 printf(" %10.10s","Ibytes"); 154 printf(" %8.8s %5.5s", "Opkts", "Oerrs"); 155 if (bflag) 156 printf(" %10.10s","Obytes"); 157 printf(" %5s", "Coll"); 158 if (tflag) 159 printf(" %s", "Time"); 160 if (dflag) 161 printf(" %s", "Drop"); 162 putchar('\n'); 163 } 164 ifaddraddr = 0; 165 while (ifnetaddr || ifaddraddr) { 166 struct sockaddr_in *sin; 167 #ifdef INET6 168 struct sockaddr_in6 *sin6; 169 #endif 170 char *cp; 171 int n, m; 172 173 network_layer = 0; 174 link_layer = 0; 175 176 if (ifaddraddr == 0) { 177 struct ifaddrhead head; 178 179 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 180 return; 181 strlcpy(name, ifnet.if_xname, sizeof(name)); 182 ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link); 183 if (interface != 0 && (strcmp(name, interface) != 0)) 184 continue; 185 cp = strchr(name, '\0'); 186 187 if (pfunc) { 188 (*pfunc)(name); 189 continue; 190 } 191 192 if ((ifnet.if_flags&IFF_UP) == 0) 193 *cp++ = '*'; 194 *cp = '\0'; 195 196 if (kread((u_long)ifnet.if_addrheads, 197 (char *)&head, sizeof(head))) 198 return; 199 200 ifaddrcont_addr = 201 (u_long)TAILQ_FIRST(&head); 202 if (ifaddrcont_addr == 0) { 203 ifaddraddr = 0; 204 } else { 205 if (kread(ifaddrcont_addr, (char *)&ifac, 206 sizeof(ifac))) 207 return; 208 ifaddraddr = (u_long)ifac.ifa; 209 } 210 } 211 ifaddrfound = ifaddraddr; 212 213 /* 214 * Get the interface stats. These may get 215 * overriden below on a per-interface basis. 216 */ 217 opackets = ifnet.if_opackets; 218 ipackets = ifnet.if_ipackets; 219 obytes = ifnet.if_obytes; 220 ibytes = ifnet.if_ibytes; 221 oerrors = ifnet.if_oerrors; 222 ierrors = ifnet.if_ierrors; 223 collisions = ifnet.if_collisions; 224 timer = ifnet.if_timer; 225 drops = ifnet.if_snd.ifq_drops; 226 227 if (ifaddraddr == 0) { 228 printf("%-7.7s %-5lu ", name, ifnet.if_mtu); 229 printf("%-13.13s ", "none"); 230 printf("%-15.15s ", "none"); 231 } else { 232 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 233 ifaddraddr = 0; 234 continue; 235 } 236 #define CP(x) ((char *)(x)) 237 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 238 CP(&ifaddr); 239 sa = (struct sockaddr *)cp; 240 if (af != AF_UNSPEC && sa->sa_family != af) { 241 ifaddrcont_addr = 242 (u_long)TAILQ_NEXT(&ifac, ifa_link); 243 if (ifaddrcont_addr == 0) { 244 ifaddraddr = 0; 245 } else { 246 if (kread(ifaddrcont_addr, 247 (char *)&ifac, sizeof(ifac))) { 248 ifaddraddr = 0; 249 continue; 250 } 251 ifaddraddr = (u_long)ifac.ifa; 252 } 253 continue; 254 } 255 printf("%-7.7s %-5lu ", name, ifnet.if_mtu); 256 switch (sa->sa_family) { 257 case AF_UNSPEC: 258 printf("%-13.13s ", "none"); 259 printf("%-15.15s ", "none"); 260 break; 261 case AF_INET: 262 sin = (struct sockaddr_in *)sa; 263 #ifdef notdef 264 /* can't use inet_makeaddr because kernel 265 * keeps nets unshifted. 266 */ 267 in = inet_makeaddr(ifaddr.in.ia_subnet, 268 INADDR_ANY); 269 printf("%-13.13s ", netname(in.s_addr, 270 ifaddr.in.ia_subnetmask)); 271 #else 272 printf("%-13.13s ", 273 netname(htonl(ifaddr.in.ia_subnet), 274 ifaddr.in.ia_subnetmask)); 275 #endif 276 printf("%-15.15s ", 277 routename(sin->sin_addr.s_addr)); 278 279 network_layer = 1; 280 break; 281 #ifdef INET6 282 case AF_INET6: 283 sin6 = (struct sockaddr_in6 *)sa; 284 printf("%-11.11s ", 285 netname6(&ifaddr.in6.ia_addr, 286 &ifaddr.in6.ia_prefixmask.sin6_addr)); 287 printf("%-17.17s ", 288 inet_ntop(AF_INET6, 289 &sin6->sin6_addr, 290 ntop_buf, sizeof(ntop_buf))); 291 292 network_layer = 1; 293 break; 294 #endif /*INET6*/ 295 case AF_IPX: 296 { 297 struct sockaddr_ipx *sipx = 298 (struct sockaddr_ipx *)sa; 299 u_long net; 300 char netnum[10]; 301 302 *(union ipx_net *) &net = sipx->sipx_addr.x_net; 303 sprintf(netnum, "%lx", (u_long)ntohl(net)); 304 printf("ipx:%-8s ", netnum); 305 /* printf("ipx:%-8s ", netname(net, 0L)); */ 306 printf("%-15s ", 307 ipx_phost((struct sockaddr *)sipx)); 308 } 309 break; 310 311 case AF_LINK: 312 { 313 struct sockaddr_dl *sdl = 314 (struct sockaddr_dl *)sa; 315 char linknum[10]; 316 cp = (char *)LLADDR(sdl); 317 n = sdl->sdl_alen; 318 sprintf(linknum, "<Link#%d>", sdl->sdl_index); 319 m = printf("%-11.11s ", linknum); 320 } 321 goto hexprint; 322 default: 323 m = printf("(%d)", sa->sa_family); 324 for (cp = sa->sa_len + (char *)sa; 325 --cp > sa->sa_data && (*cp == 0);) {} 326 n = cp - sa->sa_data + 1; 327 cp = sa->sa_data; 328 hexprint: 329 while (--n >= 0) 330 m += printf("%02x%c", *cp++ & 0xff, 331 n > 0 ? ':' : ' '); 332 m = 30 - m; 333 while (m-- > 0) 334 putchar(' '); 335 336 link_layer = 1; 337 break; 338 } 339 340 /* 341 * Fixup the statistics for interfaces that 342 * update stats for their network addresses 343 */ 344 if (network_layer) { 345 opackets = ifaddr.in.ia_ifa.if_opackets; 346 ipackets = ifaddr.in.ia_ifa.if_ipackets; 347 obytes = ifaddr.in.ia_ifa.if_obytes; 348 ibytes = ifaddr.in.ia_ifa.if_ibytes; 349 } 350 351 ifaddrcont_addr = 352 (u_long)TAILQ_NEXT(&ifac, ifa_link); 353 if (ifaddrcont_addr == 0) { 354 ifaddraddr = 0; 355 } else { 356 if (kread(ifaddrcont_addr, 357 (char *)&ifac, sizeof(ifac))) { 358 ifaddraddr = 0; 359 } else { 360 ifaddraddr = (u_long)ifac.ifa; 361 } 362 } 363 } 364 365 show_stat("lu", 8, ipackets, link_layer|network_layer); 366 printf(" "); 367 show_stat("lu", 5, ierrors, link_layer); 368 printf(" "); 369 if (bflag) { 370 show_stat("lu", 10, ibytes, link_layer|network_layer); 371 printf(" "); 372 } 373 show_stat("lu", 8, opackets, link_layer|network_layer); 374 printf(" "); 375 show_stat("lu", 5, oerrors, link_layer); 376 printf(" "); 377 if (bflag) { 378 show_stat("lu", 10, obytes, link_layer|network_layer); 379 printf(" "); 380 } 381 show_stat("lu", 5, collisions, link_layer); 382 if (tflag) { 383 printf(" "); 384 show_stat("d", 3, timer, link_layer); 385 } 386 if (dflag) { 387 printf(" "); 388 show_stat("d", 3, drops, link_layer); 389 } 390 putchar('\n'); 391 if (aflag && ifaddrfound) { 392 /* 393 * Print family's multicast addresses 394 */ 395 struct ifmultiaddr *multiaddr; 396 struct ifmultiaddr ifma; 397 union { 398 struct sockaddr sa; 399 struct sockaddr_in in; 400 #ifdef INET6 401 struct sockaddr_in6 in6; 402 #endif /* INET6 */ 403 struct sockaddr_dl dl; 404 } msa; 405 const char *fmt; 406 407 TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) { 408 if (kread((u_long)multiaddr, (char *)&ifma, 409 sizeof ifma)) 410 break; 411 multiaddr = &ifma; 412 if (kread((u_long)ifma.ifma_addr, (char *)&msa, 413 sizeof msa)) 414 break; 415 if (msa.sa.sa_family != sa->sa_family) 416 continue; 417 418 fmt = NULL; 419 switch (msa.sa.sa_family) { 420 case AF_INET: 421 fmt = routename(msa.in.sin_addr.s_addr); 422 break; 423 #ifdef INET6 424 case AF_INET6: 425 printf("%23s %-19.19s(refs: %d)\n", "", 426 inet_ntop(AF_INET6, 427 &msa.in6.sin6_addr, 428 ntop_buf, 429 sizeof(ntop_buf)), 430 ifma.ifma_refcount); 431 break; 432 #endif /* INET6 */ 433 case AF_LINK: 434 switch (msa.dl.sdl_type) { 435 case IFT_ETHER: 436 case IFT_FDDI: 437 fmt = ether_ntoa( 438 (struct ether_addr *) 439 LLADDR(&msa.dl)); 440 break; 441 } 442 break; 443 } 444 if (fmt) 445 printf("%23s %s\n", "", fmt); 446 } 447 } 448 } 449 } 450 451 struct iftot { 452 SLIST_ENTRY(iftot) chain; 453 char ift_name[IFNAMSIZ]; /* interface name */ 454 u_long ift_ip; /* input packets */ 455 u_long ift_ie; /* input errors */ 456 u_long ift_op; /* output packets */ 457 u_long ift_oe; /* output errors */ 458 u_long ift_co; /* collisions */ 459 u_int ift_dr; /* drops */ 460 u_long ift_ib; /* input bytes */ 461 u_long ift_ob; /* output bytes */ 462 }; 463 464 u_char signalled; /* set if alarm goes off "early" */ 465 466 /* 467 * Print a running summary of interface statistics. 468 * Repeat display every interval1 seconds, showing statistics 469 * collected over that interval. Assumes that interval1 is non-zero. 470 * First line printed at top of screen is always cumulative. 471 * XXX - should be rewritten to use ifmib(4). 472 */ 473 static void 474 sidewaysintpr(unsigned interval1, u_long off) 475 { 476 struct ifnet ifnet; 477 u_long firstifnet; 478 struct ifnethead ifnethead; 479 struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting; 480 int line; 481 int oldmask, first; 482 u_long interesting_off; 483 484 if (kread(off, (char *)&ifnethead, sizeof ifnethead)) 485 return; 486 firstifnet = (u_long)TAILQ_FIRST(&ifnethead); 487 488 if ((iftot = malloc(sizeof(struct iftot))) == NULL) { 489 printf("malloc failed\n"); 490 exit(1); 491 } 492 memset(iftot, 0, sizeof(struct iftot)); 493 494 interesting = NULL; 495 interesting_off = 0; 496 for (off = firstifnet, ip = iftot; off;) { 497 char name[IFNAMSIZ]; 498 499 if (kread(off, (char *)&ifnet, sizeof ifnet)) 500 break; 501 strlcpy(name, ifnet.if_xname, sizeof(name)); 502 if (interface && strcmp(name, interface) == 0) { 503 interesting = ip; 504 interesting_off = off; 505 } 506 snprintf(ip->ift_name, 16, "(%s)", name); 507 if ((ipn = malloc(sizeof(struct iftot))) == NULL) { 508 printf("malloc failed\n"); 509 exit(1); 510 } 511 memset(ipn, 0, sizeof(struct iftot)); 512 SLIST_NEXT(ip, chain) = ipn; 513 ip = ipn; 514 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 515 } 516 if ((total = malloc(sizeof(struct iftot))) == NULL) { 517 printf("malloc failed\n"); 518 exit(1); 519 } 520 memset(total, 0, sizeof(struct iftot)); 521 if ((sum = malloc(sizeof(struct iftot))) == NULL) { 522 printf("malloc failed\n"); 523 exit(1); 524 } 525 memset(sum, 0, sizeof(struct iftot)); 526 527 528 (void)signal(SIGALRM, catchalarm); 529 signalled = NO; 530 (void)alarm(interval1); 531 first = 1; 532 banner: 533 printf("%17s %14s %16s", "input", 534 interesting ? interesting->ift_name : "(Total)", "output"); 535 putchar('\n'); 536 printf("%10s %5s %10s %10s %5s %10s %5s", 537 "packets", "errs", "bytes", "packets", "errs", "bytes", "colls"); 538 if (dflag) 539 printf(" %5.5s", "drops"); 540 putchar('\n'); 541 fflush(stdout); 542 line = 0; 543 loop: 544 if (interesting != NULL) { 545 ip = interesting; 546 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) { 547 printf("???\n"); 548 exit(1); 549 }; 550 if (!first) { 551 printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu", 552 ifnet.if_ipackets - ip->ift_ip, 553 ifnet.if_ierrors - ip->ift_ie, 554 ifnet.if_ibytes - ip->ift_ib, 555 ifnet.if_opackets - ip->ift_op, 556 ifnet.if_oerrors - ip->ift_oe, 557 ifnet.if_obytes - ip->ift_ob, 558 ifnet.if_collisions - ip->ift_co); 559 if (dflag) 560 printf(" %5u", ifnet.if_snd.ifq_drops - ip->ift_dr); 561 } 562 ip->ift_ip = ifnet.if_ipackets; 563 ip->ift_ie = ifnet.if_ierrors; 564 ip->ift_ib = ifnet.if_ibytes; 565 ip->ift_op = ifnet.if_opackets; 566 ip->ift_oe = ifnet.if_oerrors; 567 ip->ift_ob = ifnet.if_obytes; 568 ip->ift_co = ifnet.if_collisions; 569 ip->ift_dr = ifnet.if_snd.ifq_drops; 570 } else { 571 sum->ift_ip = 0; 572 sum->ift_ie = 0; 573 sum->ift_ib = 0; 574 sum->ift_op = 0; 575 sum->ift_oe = 0; 576 sum->ift_ob = 0; 577 sum->ift_co = 0; 578 sum->ift_dr = 0; 579 for (off = firstifnet, ip = iftot; 580 off && SLIST_NEXT(ip, chain) != NULL; 581 ip = SLIST_NEXT(ip, chain)) { 582 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 583 off = 0; 584 continue; 585 } 586 sum->ift_ip += ifnet.if_ipackets; 587 sum->ift_ie += ifnet.if_ierrors; 588 sum->ift_ib += ifnet.if_ibytes; 589 sum->ift_op += ifnet.if_opackets; 590 sum->ift_oe += ifnet.if_oerrors; 591 sum->ift_ob += ifnet.if_obytes; 592 sum->ift_co += ifnet.if_collisions; 593 sum->ift_dr += ifnet.if_snd.ifq_drops; 594 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 595 } 596 if (!first) { 597 printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu", 598 sum->ift_ip - total->ift_ip, 599 sum->ift_ie - total->ift_ie, 600 sum->ift_ib - total->ift_ib, 601 sum->ift_op - total->ift_op, 602 sum->ift_oe - total->ift_oe, 603 sum->ift_ob - total->ift_ob, 604 sum->ift_co - total->ift_co); 605 if (dflag) 606 printf(" %5u", sum->ift_dr - total->ift_dr); 607 } 608 *total = *sum; 609 } 610 if (!first) 611 putchar('\n'); 612 fflush(stdout); 613 oldmask = sigblock(sigmask(SIGALRM)); 614 if (! signalled) { 615 sigpause(0); 616 } 617 sigsetmask(oldmask); 618 signalled = NO; 619 (void)alarm(interval1); 620 line++; 621 first = 0; 622 if (line == 21) 623 goto banner; 624 else 625 goto loop; 626 /*NOTREACHED*/ 627 } 628 629 /* 630 * Called if an interval expires before sidewaysintpr has completed a loop. 631 * Sets a flag to not wait for the alarm. 632 */ 633 static void 634 catchalarm(int signo __unused) 635 { 636 signalled = YES; 637 } 638