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 ifnetfound; 122 u_long opackets; 123 u_long ipackets; 124 u_long obytes; 125 u_long ibytes; 126 u_long oerrors; 127 u_long ierrors; 128 u_long collisions; 129 short timer; 130 int drops; 131 struct sockaddr *sa = NULL; 132 char name[IFNAMSIZ]; 133 short network_layer; 134 short link_layer; 135 136 if (ifnetaddr == 0) { 137 printf("ifnet: symbol not defined\n"); 138 return; 139 } 140 if (interval1) { 141 sidewaysintpr((unsigned)interval1, ifnetaddr); 142 return; 143 } 144 if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead)) 145 return; 146 ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead); 147 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 148 return; 149 150 if (!pfunc) { 151 printf("%-7.7s %-5.5s %-13.13s %-15.15s %8.8s %5.5s", 152 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs"); 153 if (bflag) 154 printf(" %10.10s","Ibytes"); 155 printf(" %8.8s %5.5s", "Opkts", "Oerrs"); 156 if (bflag) 157 printf(" %10.10s","Obytes"); 158 printf(" %5s", "Coll"); 159 if (tflag) 160 printf(" %s", "Time"); 161 if (dflag) 162 printf(" %s", "Drop"); 163 putchar('\n'); 164 } 165 ifaddraddr = 0; 166 while (ifnetaddr || ifaddraddr) { 167 struct sockaddr_in *sin; 168 #ifdef INET6 169 struct sockaddr_in6 *sin6; 170 #endif 171 char *cp; 172 int n, m; 173 174 network_layer = 0; 175 link_layer = 0; 176 177 if (ifaddraddr == 0) { 178 struct ifaddrhead head; 179 180 ifnetfound = ifnetaddr; 181 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 182 return; 183 strlcpy(name, ifnet.if_xname, sizeof(name)); 184 ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link); 185 if (interface != 0 && (strcmp(name, interface) != 0)) 186 continue; 187 cp = strchr(name, '\0'); 188 189 if (pfunc) { 190 (*pfunc)(name); 191 continue; 192 } 193 194 if ((ifnet.if_flags&IFF_UP) == 0) 195 *cp++ = '*'; 196 *cp = '\0'; 197 198 if (kread((u_long)ifnet.if_addrheads, 199 (char *)&head, sizeof(head))) 200 return; 201 202 ifaddrcont_addr = 203 (u_long)TAILQ_FIRST(&head); 204 if (ifaddrcont_addr == 0) { 205 ifaddraddr = 0; 206 } else { 207 if (kread(ifaddrcont_addr, (char *)&ifac, 208 sizeof(ifac))) 209 return; 210 ifaddraddr = (u_long)ifac.ifa; 211 } 212 } 213 ifaddrfound = ifaddraddr; 214 215 /* 216 * Get the interface stats. These may get 217 * overriden below on a per-interface basis. 218 */ 219 opackets = ifnet.if_opackets; 220 ipackets = ifnet.if_ipackets; 221 obytes = ifnet.if_obytes; 222 ibytes = ifnet.if_ibytes; 223 oerrors = ifnet.if_oerrors; 224 ierrors = ifnet.if_ierrors; 225 collisions = ifnet.if_collisions; 226 timer = ifnet.if_timer; 227 drops = ifnet.if_snd.ifq_drops; 228 229 if (ifaddraddr == 0) { 230 printf("%-7.7s %-5lu ", name, ifnet.if_mtu); 231 printf("%-13.13s ", "none"); 232 printf("%-15.15s ", "none"); 233 } else { 234 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 235 ifaddraddr = 0; 236 continue; 237 } 238 #define CP(x) ((char *)(x)) 239 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 240 CP(&ifaddr); 241 sa = (struct sockaddr *)cp; 242 if (af != AF_UNSPEC && sa->sa_family != af) { 243 ifaddrcont_addr = 244 (u_long)TAILQ_NEXT(&ifac, ifa_link); 245 if (ifaddrcont_addr == 0) { 246 ifaddraddr = 0; 247 } else { 248 if (kread(ifaddrcont_addr, 249 (char *)&ifac, sizeof(ifac))) { 250 ifaddraddr = 0; 251 continue; 252 } 253 ifaddraddr = (u_long)ifac.ifa; 254 } 255 continue; 256 } 257 printf("%-7.7s %-5lu ", name, ifnet.if_mtu); 258 switch (sa->sa_family) { 259 case AF_UNSPEC: 260 printf("%-13.13s ", "none"); 261 printf("%-15.15s ", "none"); 262 break; 263 case AF_INET: 264 sin = (struct sockaddr_in *)sa; 265 #ifdef notdef 266 /* can't use inet_makeaddr because kernel 267 * keeps nets unshifted. 268 */ 269 in = inet_makeaddr(ifaddr.in.ia_subnet, 270 INADDR_ANY); 271 printf("%-13.13s ", netname(in.s_addr, 272 ifaddr.in.ia_subnetmask)); 273 #else 274 printf("%-13.13s ", 275 netname(htonl(ifaddr.in.ia_subnet), 276 ifaddr.in.ia_subnetmask)); 277 #endif 278 printf("%-15.15s ", 279 routename(sin->sin_addr.s_addr)); 280 281 network_layer = 1; 282 break; 283 #ifdef INET6 284 case AF_INET6: 285 sin6 = (struct sockaddr_in6 *)sa; 286 printf("%-11.11s ", 287 netname6(&ifaddr.in6.ia_addr, 288 &ifaddr.in6.ia_prefixmask.sin6_addr)); 289 printf("%-17.17s ", 290 inet_ntop(AF_INET6, 291 &sin6->sin6_addr, 292 ntop_buf, sizeof(ntop_buf))); 293 294 network_layer = 1; 295 break; 296 #endif /*INET6*/ 297 case AF_IPX: 298 { 299 struct sockaddr_ipx *sipx = 300 (struct sockaddr_ipx *)sa; 301 u_long net; 302 char netnum[10]; 303 304 *(union ipx_net *) &net = sipx->sipx_addr.x_net; 305 sprintf(netnum, "%lx", (u_long)ntohl(net)); 306 printf("ipx:%-8s ", netnum); 307 /* printf("ipx:%-8s ", netname(net, 0L)); */ 308 printf("%-15s ", 309 ipx_phost((struct sockaddr *)sipx)); 310 } 311 break; 312 313 case AF_LINK: 314 { 315 struct sockaddr_dl *sdl = 316 (struct sockaddr_dl *)sa; 317 char linknum[10]; 318 cp = (char *)LLADDR(sdl); 319 n = sdl->sdl_alen; 320 sprintf(linknum, "<Link#%d>", sdl->sdl_index); 321 m = printf("%-11.11s ", linknum); 322 } 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("%02x%c", *cp++ & 0xff, 333 n > 0 ? ':' : ' '); 334 m = 30 - m; 335 while (m-- > 0) 336 putchar(' '); 337 338 link_layer = 1; 339 break; 340 } 341 342 /* 343 * Fixup the statistics for interfaces that 344 * update stats for their network addresses 345 */ 346 if (network_layer) { 347 opackets = ifaddr.in.ia_ifa.if_opackets; 348 ipackets = ifaddr.in.ia_ifa.if_ipackets; 349 obytes = ifaddr.in.ia_ifa.if_obytes; 350 ibytes = ifaddr.in.ia_ifa.if_ibytes; 351 } 352 353 ifaddrcont_addr = 354 (u_long)TAILQ_NEXT(&ifac, ifa_link); 355 if (ifaddrcont_addr == 0) { 356 ifaddraddr = 0; 357 } else { 358 if (kread(ifaddrcont_addr, 359 (char *)&ifac, sizeof(ifac))) { 360 ifaddraddr = 0; 361 } else { 362 ifaddraddr = (u_long)ifac.ifa; 363 } 364 } 365 } 366 367 show_stat("lu", 8, ipackets, link_layer|network_layer); 368 printf(" "); 369 show_stat("lu", 5, ierrors, link_layer); 370 printf(" "); 371 if (bflag) { 372 show_stat("lu", 10, ibytes, link_layer|network_layer); 373 printf(" "); 374 } 375 show_stat("lu", 8, opackets, link_layer|network_layer); 376 printf(" "); 377 show_stat("lu", 5, oerrors, link_layer); 378 printf(" "); 379 if (bflag) { 380 show_stat("lu", 10, obytes, link_layer|network_layer); 381 printf(" "); 382 } 383 show_stat("lu", 5, collisions, link_layer); 384 if (tflag) { 385 printf(" "); 386 show_stat("d", 3, timer, link_layer); 387 } 388 if (dflag) { 389 printf(" "); 390 show_stat("d", 3, drops, link_layer); 391 } 392 putchar('\n'); 393 if (aflag && ifaddrfound) { 394 /* 395 * Print family's multicast addresses 396 */ 397 struct ifmultiaddr *multiaddr; 398 struct ifmultiaddr ifma; 399 union { 400 struct sockaddr sa; 401 struct sockaddr_in in; 402 #ifdef INET6 403 struct sockaddr_in6 in6; 404 #endif /* INET6 */ 405 struct sockaddr_dl dl; 406 } msa; 407 const char *fmt; 408 409 TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) { 410 if (kread((u_long)multiaddr, (char *)&ifma, 411 sizeof ifma)) 412 break; 413 multiaddr = &ifma; 414 if (kread((u_long)ifma.ifma_addr, (char *)&msa, 415 sizeof msa)) 416 break; 417 if (msa.sa.sa_family != sa->sa_family) 418 continue; 419 420 fmt = 0; 421 switch (msa.sa.sa_family) { 422 case AF_INET: 423 fmt = routename(msa.in.sin_addr.s_addr); 424 break; 425 #ifdef INET6 426 case AF_INET6: 427 printf("%23s %-19.19s(refs: %d)\n", "", 428 inet_ntop(AF_INET6, 429 &msa.in6.sin6_addr, 430 ntop_buf, 431 sizeof(ntop_buf)), 432 ifma.ifma_refcount); 433 break; 434 #endif /* INET6 */ 435 case AF_LINK: 436 switch (msa.dl.sdl_type) { 437 case IFT_ETHER: 438 case IFT_FDDI: 439 fmt = ether_ntoa( 440 (struct ether_addr *) 441 LLADDR(&msa.dl)); 442 break; 443 } 444 break; 445 } 446 if (fmt) 447 printf("%23s %s\n", "", fmt); 448 } 449 } 450 } 451 } 452 453 struct iftot { 454 SLIST_ENTRY(iftot) chain; 455 char ift_name[IFNAMSIZ]; /* interface name */ 456 u_long ift_ip; /* input packets */ 457 u_long ift_ie; /* input errors */ 458 u_long ift_op; /* output packets */ 459 u_long ift_oe; /* output errors */ 460 u_long ift_co; /* collisions */ 461 u_int ift_dr; /* drops */ 462 u_long ift_ib; /* input bytes */ 463 u_long ift_ob; /* output bytes */ 464 }; 465 466 u_char signalled; /* set if alarm goes off "early" */ 467 468 /* 469 * Print a running summary of interface statistics. 470 * Repeat display every interval1 seconds, showing statistics 471 * collected over that interval. Assumes that interval1 is non-zero. 472 * First line printed at top of screen is always cumulative. 473 * XXX - should be rewritten to use ifmib(4). 474 */ 475 static void 476 sidewaysintpr(unsigned interval1, u_long off) 477 { 478 struct ifnet ifnet; 479 u_long firstifnet; 480 struct ifnethead ifnethead; 481 struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting; 482 int line; 483 int oldmask, first; 484 u_long interesting_off; 485 486 if (kread(off, (char *)&ifnethead, sizeof ifnethead)) 487 return; 488 firstifnet = (u_long)TAILQ_FIRST(&ifnethead); 489 490 if ((iftot = malloc(sizeof(struct iftot))) == NULL) { 491 printf("malloc failed\n"); 492 exit(1); 493 } 494 memset(iftot, 0, sizeof(struct iftot)); 495 496 interesting = NULL; 497 interesting_off = 0; 498 for (off = firstifnet, ip = iftot; off;) { 499 char name[IFNAMSIZ]; 500 501 if (kread(off, (char *)&ifnet, sizeof ifnet)) 502 break; 503 strlcpy(name, ifnet.if_xname, sizeof(name)); 504 if (interface && strcmp(name, interface) == 0) { 505 interesting = ip; 506 interesting_off = off; 507 } 508 snprintf(ip->ift_name, 16, "(%s)", name); 509 if ((ipn = malloc(sizeof(struct iftot))) == NULL) { 510 printf("malloc failed\n"); 511 exit(1); 512 } 513 memset(ipn, 0, sizeof(struct iftot)); 514 SLIST_NEXT(ip, chain) = ipn; 515 ip = ipn; 516 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 517 } 518 if ((total = malloc(sizeof(struct iftot))) == NULL) { 519 printf("malloc failed\n"); 520 exit(1); 521 } 522 memset(total, 0, sizeof(struct iftot)); 523 if ((sum = malloc(sizeof(struct iftot))) == NULL) { 524 printf("malloc failed\n"); 525 exit(1); 526 } 527 memset(sum, 0, sizeof(struct iftot)); 528 529 530 (void)signal(SIGALRM, catchalarm); 531 signalled = NO; 532 (void)alarm(interval1); 533 first = 1; 534 banner: 535 printf("%17s %14s %16s", "input", 536 interesting ? interesting->ift_name : "(Total)", "output"); 537 putchar('\n'); 538 printf("%10s %5s %10s %10s %5s %10s %5s", 539 "packets", "errs", "bytes", "packets", "errs", "bytes", "colls"); 540 if (dflag) 541 printf(" %5.5s", "drops"); 542 putchar('\n'); 543 fflush(stdout); 544 line = 0; 545 loop: 546 if (interesting != NULL) { 547 ip = interesting; 548 if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) { 549 printf("???\n"); 550 exit(1); 551 }; 552 if (!first) { 553 printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu", 554 ifnet.if_ipackets - ip->ift_ip, 555 ifnet.if_ierrors - ip->ift_ie, 556 ifnet.if_ibytes - ip->ift_ib, 557 ifnet.if_opackets - ip->ift_op, 558 ifnet.if_oerrors - ip->ift_oe, 559 ifnet.if_obytes - ip->ift_ob, 560 ifnet.if_collisions - ip->ift_co); 561 if (dflag) 562 printf(" %5u", ifnet.if_snd.ifq_drops - ip->ift_dr); 563 } 564 ip->ift_ip = ifnet.if_ipackets; 565 ip->ift_ie = ifnet.if_ierrors; 566 ip->ift_ib = ifnet.if_ibytes; 567 ip->ift_op = ifnet.if_opackets; 568 ip->ift_oe = ifnet.if_oerrors; 569 ip->ift_ob = ifnet.if_obytes; 570 ip->ift_co = ifnet.if_collisions; 571 ip->ift_dr = ifnet.if_snd.ifq_drops; 572 } else { 573 sum->ift_ip = 0; 574 sum->ift_ie = 0; 575 sum->ift_ib = 0; 576 sum->ift_op = 0; 577 sum->ift_oe = 0; 578 sum->ift_ob = 0; 579 sum->ift_co = 0; 580 sum->ift_dr = 0; 581 for (off = firstifnet, ip = iftot; 582 off && SLIST_NEXT(ip, chain) != NULL; 583 ip = SLIST_NEXT(ip, chain)) { 584 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 585 off = 0; 586 continue; 587 } 588 sum->ift_ip += ifnet.if_ipackets; 589 sum->ift_ie += ifnet.if_ierrors; 590 sum->ift_ib += ifnet.if_ibytes; 591 sum->ift_op += ifnet.if_opackets; 592 sum->ift_oe += ifnet.if_oerrors; 593 sum->ift_ob += ifnet.if_obytes; 594 sum->ift_co += ifnet.if_collisions; 595 sum->ift_dr += ifnet.if_snd.ifq_drops; 596 off = (u_long)TAILQ_NEXT(&ifnet, if_link); 597 } 598 if (!first) { 599 printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu", 600 sum->ift_ip - total->ift_ip, 601 sum->ift_ie - total->ift_ie, 602 sum->ift_ib - total->ift_ib, 603 sum->ift_op - total->ift_op, 604 sum->ift_oe - total->ift_oe, 605 sum->ift_ob - total->ift_ob, 606 sum->ift_co - total->ift_co); 607 if (dflag) 608 printf(" %5u", sum->ift_dr - total->ift_dr); 609 } 610 *total = *sum; 611 } 612 if (!first) 613 putchar('\n'); 614 fflush(stdout); 615 oldmask = sigblock(sigmask(SIGALRM)); 616 if (! signalled) { 617 sigpause(0); 618 } 619 sigsetmask(oldmask); 620 signalled = NO; 621 (void)alarm(interval1); 622 line++; 623 first = 0; 624 if (line == 21) 625 goto banner; 626 else 627 goto loop; 628 /*NOTREACHED*/ 629 } 630 631 /* 632 * Called if an interval expires before sidewaysintpr has completed a loop. 633 * Sets a flag to not wait for the alarm. 634 */ 635 static void 636 catchalarm(int signo __unused) 637 { 638 signalled = YES; 639 } 640