if.c revision 263086
1/*- 2 * Copyright (c) 2013 Gleb Smirnoff <glebius@FreeBSD.org> 3 * Copyright (c) 1983, 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#if 0 32#ifndef lint 33static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95"; 34#endif /* not lint */ 35#endif 36 37#include <sys/cdefs.h> 38__FBSDID("$FreeBSD: stable/10/usr.bin/netstat/if.c 263086 2014-03-12 10:45:58Z glebius $"); 39 40#include <sys/types.h> 41#include <sys/protosw.h> 42#include <sys/socket.h> 43#include <sys/socketvar.h> 44#include <sys/sysctl.h> 45#include <sys/time.h> 46 47#include <net/if.h> 48#include <net/if_var.h> 49#include <net/if_dl.h> 50#include <net/if_types.h> 51#include <net/ethernet.h> 52#include <netinet/in.h> 53#include <netinet/in_var.h> 54#include <netipx/ipx.h> 55#include <netipx/ipx_if.h> 56#include <arpa/inet.h> 57#ifdef PF 58#include <net/pfvar.h> 59#include <net/if_pfsync.h> 60#endif 61 62#include <err.h> 63#include <errno.h> 64#include <ifaddrs.h> 65#include <libutil.h> 66#ifdef INET6 67#include <netdb.h> 68#endif 69#include <signal.h> 70#include <stdbool.h> 71#include <stdint.h> 72#include <stdio.h> 73#include <stdlib.h> 74#include <string.h> 75#include <sysexits.h> 76#include <unistd.h> 77 78#include "netstat.h" 79 80static void sidewaysintpr(int); 81 82#ifdef INET6 83static char addr_buf[NI_MAXHOST]; /* for getnameinfo() */ 84#endif 85 86#ifdef PF 87static const char* pfsyncacts[] = { 88 /* PFSYNC_ACT_CLR */ "clear all request", 89 /* PFSYNC_ACT_INS */ "state insert", 90 /* PFSYNC_ACT_INS_ACK */ "state inserted ack", 91 /* PFSYNC_ACT_UPD */ "state update", 92 /* PFSYNC_ACT_UPD_C */ "compressed state update", 93 /* PFSYNC_ACT_UPD_REQ */ "uncompressed state request", 94 /* PFSYNC_ACT_DEL */ "state delete", 95 /* PFSYNC_ACT_DEL_C */ "compressed state delete", 96 /* PFSYNC_ACT_INS_F */ "fragment insert", 97 /* PFSYNC_ACT_DEL_F */ "fragment delete", 98 /* PFSYNC_ACT_BUS */ "bulk update mark", 99 /* PFSYNC_ACT_TDB */ "TDB replay counter update", 100 /* PFSYNC_ACT_EOF */ "end of frame mark", 101}; 102 103static void 104pfsync_acts_stats(const char *fmt, uint64_t *a) 105{ 106 int i; 107 108 for (i = 0; i < PFSYNC_ACT_MAX; i++, a++) 109 if (*a || sflag <= 1) 110 printf(fmt, *a, pfsyncacts[i], plural(*a)); 111} 112 113/* 114 * Dump pfsync statistics structure. 115 */ 116void 117pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused) 118{ 119 struct pfsyncstats pfsyncstat, zerostat; 120 size_t len = sizeof(struct pfsyncstats); 121 122 if (live) { 123 if (zflag) 124 memset(&zerostat, 0, len); 125 if (sysctlbyname("net.pfsync.stats", &pfsyncstat, &len, 126 zflag ? &zerostat : NULL, zflag ? len : 0) < 0) { 127 if (errno != ENOENT) 128 warn("sysctl: net.pfsync.stats"); 129 return; 130 } 131 } else 132 kread(off, &pfsyncstat, len); 133 134 printf("%s:\n", name); 135 136#define p(f, m) if (pfsyncstat.f || sflag <= 1) \ 137 printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f)) 138 139 p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n"); 140 p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n"); 141 pfsync_acts_stats("\t %ju %s%s received\n", 142 &pfsyncstat.pfsyncs_iacts[0]); 143 p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n"); 144 p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n"); 145 p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n"); 146 p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n"); 147 p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n"); 148 p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n"); 149 p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n"); 150 p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n"); 151 p(pfsyncs_stale, "\t\t%ju stale state%s\n"); 152 p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n"); 153 p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n"); 154 p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n"); 155 pfsync_acts_stats("\t %ju %s%s sent\n", 156 &pfsyncstat.pfsyncs_oacts[0]); 157 p(pfsyncs_onomem, "\t\t%ju failure%s due to mbuf memory error\n"); 158 p(pfsyncs_oerrors, "\t\t%ju send error%s\n"); 159#undef p 160} 161#endif /* PF */ 162 163/* 164 * Display a formatted value, or a '-' in the same space. 165 */ 166static void 167show_stat(const char *fmt, int width, u_long value, short showvalue) 168{ 169 const char *lsep, *rsep; 170 char newfmt[32]; 171 172 lsep = ""; 173 if (strncmp(fmt, "LS", 2) == 0) { 174 lsep = " "; 175 fmt += 2; 176 } 177 rsep = " "; 178 if (strncmp(fmt, "NRS", 3) == 0) { 179 rsep = ""; 180 fmt += 3; 181 } 182 if (showvalue == 0) { 183 /* Print just dash. */ 184 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 185 printf(newfmt, "-"); 186 return; 187 } 188 189 if (hflag) { 190 char buf[5]; 191 192 /* Format in human readable form. */ 193 humanize_number(buf, sizeof(buf), (int64_t)value, "", 194 HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL); 195 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 196 printf(newfmt, buf); 197 } else { 198 /* Construct the format string. */ 199 sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep); 200 printf(newfmt, value); 201 } 202} 203 204/* 205 * Find next multiaddr for a given interface name. 206 */ 207static struct ifmaddrs * 208next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family) 209{ 210 211 for(; ifma != NULL; ifma = ifma->ifma_next) { 212 struct sockaddr_dl *sdl; 213 214 sdl = (struct sockaddr_dl *)ifma->ifma_name; 215 if (ifma->ifma_addr->sa_family == family && 216 strcmp(sdl->sdl_data, name) == 0) 217 break; 218 } 219 220 return (ifma); 221} 222 223/* 224 * Print a description of the network interfaces. 225 */ 226void 227intpr(int interval, void (*pfunc)(char *)) 228{ 229 struct ifaddrs *ifap, *ifa; 230 struct ifmaddrs *ifmap, *ifma; 231 232 if (interval) 233 return sidewaysintpr(interval); 234 235 if (getifaddrs(&ifap) != 0) 236 err(EX_OSERR, "getifaddrs"); 237 if (aflag && getifmaddrs(&ifmap) != 0) 238 err(EX_OSERR, "getifmaddrs"); 239 240 if (!pfunc) { 241 if (Wflag) 242 printf("%-7.7s", "Name"); 243 else 244 printf("%-5.5s", "Name"); 245 printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s", 246 "Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop"); 247 if (bflag) 248 printf(" %10.10s","Ibytes"); 249 printf(" %8.8s %5.5s", "Opkts", "Oerrs"); 250 if (bflag) 251 printf(" %10.10s","Obytes"); 252 printf(" %5s", "Coll"); 253 if (dflag) 254 printf(" %s", "Drop"); 255 putchar('\n'); 256 } 257 258 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 259 bool network = false, link = false; 260 261 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0) 262 continue; 263 264 if (pfunc) { 265 char *name; 266 267 name = ifa->ifa_name; 268 (*pfunc)(name); 269 270 /* 271 * Skip all ifaddrs belonging to same interface. 272 */ 273 while(ifa->ifa_next != NULL && 274 (strcmp(ifa->ifa_next->ifa_name, name) == 0)) { 275 ifa = ifa->ifa_next; 276 } 277 continue; 278 } 279 280 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af) 281 continue; 282 283 if (Wflag) 284 printf("%-7.7s", ifa->ifa_name); 285 else 286 printf("%-5.5s", ifa->ifa_name); 287 288#define IFA_MTU(ifa) (((struct if_data *)(ifa)->ifa_data)->ifi_mtu) 289 show_stat("lu", 6, IFA_MTU(ifa), IFA_MTU(ifa)); 290#undef IFA_MTU 291 292 switch (ifa->ifa_addr->sa_family) { 293 case AF_UNSPEC: 294 printf("%-13.13s ", "none"); 295 printf("%-15.15s ", "none"); 296 break; 297 case AF_INET: 298 { 299 struct sockaddr_in *sin, *mask; 300 301 sin = (struct sockaddr_in *)ifa->ifa_addr; 302 mask = (struct sockaddr_in *)ifa->ifa_netmask; 303 printf("%-13.13s ", netname(sin->sin_addr.s_addr, 304 mask->sin_addr.s_addr)); 305 printf("%-17.17s ", 306 routename(sin->sin_addr.s_addr)); 307 308 network = true; 309 break; 310 } 311#ifdef INET6 312 case AF_INET6: 313 { 314 struct sockaddr_in6 *sin6, *mask; 315 316 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 317 mask = (struct sockaddr_in6 *)ifa->ifa_netmask; 318 319 printf("%-13.13s ", netname6(sin6, &mask->sin6_addr)); 320 getnameinfo(ifa->ifa_addr, ifa->ifa_addr->sa_len, 321 addr_buf, sizeof(addr_buf), 0, 0, NI_NUMERICHOST); 322 printf("%-17.17s ", addr_buf); 323 324 network = 1; 325 break; 326 } 327#endif /* INET6 */ 328 case AF_IPX: 329 { 330 struct sockaddr_ipx *sipx; 331 u_long net; 332 char netnum[10]; 333 334 sipx = (struct sockaddr_ipx *)ifa->ifa_addr; 335 *(union ipx_net *) &net = sipx->sipx_addr.x_net; 336 337 sprintf(netnum, "%lx", (u_long)ntohl(net)); 338 printf("ipx:%-8s ", netnum); 339 printf("%-17s ", ipx_phost((struct sockaddr *)sipx)); 340 341 network = 1; 342 break; 343 } 344 case AF_APPLETALK: 345 printf("atalk:%-12.12s ", 346 atalk_print(ifa->ifa_addr, 0x10)); 347 printf("%-11.11s ", 348 atalk_print(ifa->ifa_addr, 0x0b)); 349 break; 350 case AF_LINK: 351 { 352 struct sockaddr_dl *sdl; 353 char *cp, linknum[10]; 354 int n, m; 355 356 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 357 cp = (char *)LLADDR(sdl); 358 n = sdl->sdl_alen; 359 sprintf(linknum, "<Link#%d>", sdl->sdl_index); 360 m = printf("%-13.13s ", linknum); 361 362 while ((--n >= 0) && (m < 30)) 363 m += printf("%02x%c", *cp++ & 0xff, 364 n > 0 ? ':' : ' '); 365 m = 32 - m; 366 while (m-- > 0) 367 putchar(' '); 368 369 link = 1; 370 break; 371 } 372 } 373 374#define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s) 375 show_stat("lu", 8, IFA_STAT(ipackets), link|network); 376 show_stat("lu", 5, IFA_STAT(ierrors), link); 377 show_stat("lu", 5, IFA_STAT(iqdrops), link); 378 if (bflag) 379 show_stat("lu", 10, IFA_STAT(ibytes), link|network); 380 show_stat("lu", 8, IFA_STAT(opackets), link|network); 381 show_stat("lu", 5, IFA_STAT(oerrors), link); 382 if (bflag) 383 show_stat("lu", 10, IFA_STAT(obytes), link|network); 384 show_stat("NRSlu", 5, IFA_STAT(collisions), link); 385 /* XXXGL: output queue drops */ 386 putchar('\n'); 387 388 if (!aflag) 389 continue; 390 391 /* 392 * Print family's multicast addresses. 393 */ 394 for (ifma = next_ifma(ifmap, ifa->ifa_name, 395 ifa->ifa_addr->sa_family); 396 ifma != NULL; 397 ifma = next_ifma(ifma, ifa->ifa_name, 398 ifa->ifa_addr->sa_family)) { 399 const char *fmt = NULL; 400 401 switch (ifma->ifma_addr->sa_family) { 402 case AF_INET: 403 { 404 struct sockaddr_in *sin; 405 406 sin = (struct sockaddr_in *)ifma->ifma_addr; 407 fmt = routename(sin->sin_addr.s_addr); 408 break; 409 } 410#ifdef INET6 411 case AF_INET6: 412 413 /* in6_fillscopeid(&msa.in6); */ 414 getnameinfo(ifma->ifma_addr, 415 ifma->ifma_addr->sa_len, addr_buf, 416 sizeof(addr_buf), 0, 0, NI_NUMERICHOST); 417 printf("%*s %s\n", 418 Wflag ? 27 : 25, "", addr_buf); 419 break; 420#endif /* INET6 */ 421 case AF_LINK: 422 { 423 struct sockaddr_dl *sdl; 424 425 sdl = (struct sockaddr_dl *)ifma->ifma_addr; 426 switch (sdl->sdl_type) { 427 case IFT_ETHER: 428 case IFT_FDDI: 429 fmt = ether_ntoa( 430 (struct ether_addr *)LLADDR(sdl)); 431 break; 432 } 433 break; 434 } 435 } 436 437 if (fmt) { 438 printf("%*s %-17.17s", 439 Wflag ? 27 : 25, "", fmt); 440 if (ifma->ifma_addr->sa_family == AF_LINK) { 441 printf(" %8lu", IFA_STAT(imcasts)); 442 printf("%*s", bflag ? 17 : 6, ""); 443 printf(" %8lu", IFA_STAT(omcasts)); 444 } 445 putchar('\n'); 446 } 447 448 ifma = ifma->ifma_next; 449 } 450 } 451 452 freeifaddrs(ifap); 453 if (aflag) 454 freeifmaddrs(ifmap); 455} 456 457struct iftot { 458 u_long ift_ip; /* input packets */ 459 u_long ift_ie; /* input errors */ 460 u_long ift_id; /* input drops */ 461 u_long ift_op; /* output packets */ 462 u_long ift_oe; /* output errors */ 463 u_long ift_co; /* collisions */ 464 u_long ift_ib; /* input bytes */ 465 u_long ift_ob; /* output bytes */ 466}; 467 468/* 469 * Obtain stats for interface(s). 470 */ 471static void 472fill_iftot(struct iftot *st) 473{ 474 struct ifaddrs *ifap, *ifa; 475 bool found = false; 476 477 if (getifaddrs(&ifap) != 0) 478 err(EX_OSERR, "getifaddrs"); 479 480 bzero(st, sizeof(*st)); 481 482 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 483 if (ifa->ifa_addr->sa_family != AF_LINK) 484 continue; 485 if (interface) { 486 if (strcmp(ifa->ifa_name, interface) == 0) 487 found = true; 488 else 489 continue; 490 } 491 492 st->ift_ip += IFA_STAT(ipackets); 493 st->ift_ie += IFA_STAT(ierrors); 494 st->ift_id += IFA_STAT(iqdrops); 495 st->ift_ib += IFA_STAT(ibytes); 496 st->ift_op += IFA_STAT(opackets); 497 st->ift_oe += IFA_STAT(oerrors); 498 st->ift_ob += IFA_STAT(obytes); 499 st->ift_co += IFA_STAT(collisions); 500 } 501 502 if (interface && found == false) 503 err(EX_DATAERR, "interface %s not found", interface); 504 505 freeifaddrs(ifap); 506} 507 508/* 509 * Set a flag to indicate that a signal from the periodic itimer has been 510 * caught. 511 */ 512static sig_atomic_t signalled; 513static void 514catchalarm(int signo __unused) 515{ 516 signalled = true; 517} 518 519/* 520 * Print a running summary of interface statistics. 521 * Repeat display every interval seconds, showing statistics 522 * collected over that interval. Assumes that interval is non-zero. 523 * First line printed at top of screen is always cumulative. 524 */ 525static void 526sidewaysintpr(int interval) 527{ 528 struct iftot ift[2], *new, *old; 529 struct itimerval interval_it; 530 int oldmask, line; 531 532 new = &ift[0]; 533 old = &ift[1]; 534 fill_iftot(old); 535 536 (void)signal(SIGALRM, catchalarm); 537 signalled = false; 538 interval_it.it_interval.tv_sec = interval; 539 interval_it.it_interval.tv_usec = 0; 540 interval_it.it_value = interval_it.it_interval; 541 setitimer(ITIMER_REAL, &interval_it, NULL); 542 543banner: 544 printf("%17s %14s %16s", "input", 545 interface != NULL ? interface : "(Total)", "output"); 546 putchar('\n'); 547 printf("%10s %5s %5s %10s %10s %5s %10s %5s", 548 "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes", 549 "colls"); 550 if (dflag) 551 printf(" %5.5s", "drops"); 552 putchar('\n'); 553 fflush(stdout); 554 line = 0; 555 556loop: 557 if ((noutputs != 0) && (--noutputs == 0)) 558 exit(0); 559 oldmask = sigblock(sigmask(SIGALRM)); 560 while (!signalled) 561 sigpause(0); 562 signalled = false; 563 sigsetmask(oldmask); 564 line++; 565 566 fill_iftot(new); 567 568 show_stat("lu", 10, new->ift_ip - old->ift_ip, 1); 569 show_stat("lu", 5, new->ift_ie - old->ift_ie, 1); 570 show_stat("lu", 5, new->ift_id - old->ift_id, 1); 571 show_stat("lu", 10, new->ift_ib - old->ift_ib, 1); 572 show_stat("lu", 10, new->ift_op - old->ift_op, 1); 573 show_stat("lu", 5, new->ift_oe - old->ift_oe, 1); 574 show_stat("lu", 10, new->ift_ob - old->ift_ob, 1); 575 show_stat("NRSlu", 5, new->ift_co - old->ift_co, 1); 576 /* XXXGL: output queue drops */ 577 putchar('\n'); 578 fflush(stdout); 579 580 if (new == &ift[0]) { 581 new = &ift[1]; 582 old = &ift[0]; 583 } else { 584 new = &ift[0]; 585 old = &ift[1]; 586 } 587 588 if (line == 21) 589 goto banner; 590 else 591 goto loop; 592 593 /* NOTREACHED */ 594} 595