if.c revision 293307
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 293307 2016-01-07 07:21:37Z markj $"); 39 40#include <sys/param.h> 41#include <sys/protosw.h> 42#include <sys/socket.h> 43#include <sys/socketvar.h> 44#include <sys/time.h> 45 46#define _IFI_OQDROPS 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; 120 121 if (fetch_stats("net.pfsync.stats", off, &pfsyncstat, 122 sizeof(pfsyncstat), kread) != 0) 123 return; 124 125 printf("%s:\n", name); 126 127#define p(f, m) if (pfsyncstat.f || sflag <= 1) \ 128 printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f)) 129 130 p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n"); 131 p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n"); 132 pfsync_acts_stats("\t %ju %s%s received\n", 133 &pfsyncstat.pfsyncs_iacts[0]); 134 p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n"); 135 p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n"); 136 p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n"); 137 p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n"); 138 p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n"); 139 p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n"); 140 p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n"); 141 p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n"); 142 p(pfsyncs_stale, "\t\t%ju stale state%s\n"); 143 p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n"); 144 p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n"); 145 p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n"); 146 pfsync_acts_stats("\t %ju %s%s sent\n", 147 &pfsyncstat.pfsyncs_oacts[0]); 148 p(pfsyncs_onomem, "\t\t%ju failure%s due to mbuf memory error\n"); 149 p(pfsyncs_oerrors, "\t\t%ju send error%s\n"); 150#undef p 151} 152#endif /* PF */ 153 154/* 155 * Display a formatted value, or a '-' in the same space. 156 */ 157static void 158show_stat(const char *fmt, int width, u_long value, short showvalue, 159 int div1000) 160{ 161 const char *lsep, *rsep; 162 char newfmt[32]; 163 164 lsep = ""; 165 if (strncmp(fmt, "LS", 2) == 0) { 166 lsep = " "; 167 fmt += 2; 168 } 169 rsep = " "; 170 if (strncmp(fmt, "NRS", 3) == 0) { 171 rsep = ""; 172 fmt += 3; 173 } 174 if (showvalue == 0) { 175 /* Print just dash. */ 176 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 177 printf(newfmt, "-"); 178 return; 179 } 180 181 if (hflag) { 182 char buf[5]; 183 184 /* Format in human readable form. */ 185 humanize_number(buf, sizeof(buf), (int64_t)value, "", 186 HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \ 187 ((div1000) ? HN_DIVISOR_1000 : 0)); 188 sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep); 189 printf(newfmt, buf); 190 } else { 191 /* Construct the format string. */ 192 sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep); 193 printf(newfmt, value); 194 } 195} 196 197/* 198 * Find next multiaddr for a given interface name. 199 */ 200static struct ifmaddrs * 201next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family) 202{ 203 204 for(; ifma != NULL; ifma = ifma->ifma_next) { 205 struct sockaddr_dl *sdl; 206 207 sdl = (struct sockaddr_dl *)ifma->ifma_name; 208 if (ifma->ifma_addr->sa_family == family && 209 strcmp(sdl->sdl_data, name) == 0) 210 break; 211 } 212 213 return (ifma); 214} 215 216/* 217 * Print a description of the network interfaces. 218 */ 219void 220intpr(int interval, void (*pfunc)(char *), int af) 221{ 222 struct ifaddrs *ifap, *ifa; 223 struct ifmaddrs *ifmap, *ifma; 224 u_int ifn_len_max = 5; 225 226 if (interval) 227 return sidewaysintpr(interval); 228 229 if (getifaddrs(&ifap) != 0) 230 err(EX_OSERR, "getifaddrs"); 231 if (aflag && getifmaddrs(&ifmap) != 0) 232 err(EX_OSERR, "getifmaddrs"); 233 234 if (Wflag) { 235 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 236 if (interface != NULL && 237 strcmp(ifa->ifa_name, interface) != 0) 238 continue; 239 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af) 240 continue; 241 ifn_len_max = MAX(ifn_len_max, strlen(ifa->ifa_name)); 242 } 243 } 244 245 if (!pfunc) { 246 printf("%-*.*s", ifn_len_max, ifn_len_max, "Name"); 247 printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s", 248 "Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop"); 249 if (bflag) 250 printf(" %10.10s","Ibytes"); 251 printf(" %8.8s %5.5s", "Opkts", "Oerrs"); 252 if (bflag) 253 printf(" %10.10s","Obytes"); 254 printf(" %5s", "Coll"); 255 if (dflag) 256 printf(" %s", "Drop"); 257 putchar('\n'); 258 } 259 260 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 261 bool network = false, link = false; 262 263 if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0) 264 continue; 265 266 if (pfunc) { 267 char *name; 268 269 name = ifa->ifa_name; 270 (*pfunc)(name); 271 272 /* 273 * Skip all ifaddrs belonging to same interface. 274 */ 275 while(ifa->ifa_next != NULL && 276 (strcmp(ifa->ifa_next->ifa_name, name) == 0)) { 277 ifa = ifa->ifa_next; 278 } 279 continue; 280 } 281 282 if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af) 283 continue; 284 285 printf("%-*.*s", ifn_len_max, ifn_len_max, ifa->ifa_name); 286 287#define IFA_MTU(ifa) (((struct if_data *)(ifa)->ifa_data)->ifi_mtu) 288 show_stat("lu", 6, IFA_MTU(ifa), IFA_MTU(ifa), 0); 289#undef IFA_MTU 290 291 switch (ifa->ifa_addr->sa_family) { 292 case AF_UNSPEC: 293 printf("%-13.13s ", "none"); 294 printf("%-15.15s ", "none"); 295 break; 296 case AF_INET: 297 { 298 struct sockaddr_in *sin, *mask; 299 300 sin = (struct sockaddr_in *)ifa->ifa_addr; 301 mask = (struct sockaddr_in *)ifa->ifa_netmask; 302 printf("%-13.13s ", netname(sin->sin_addr.s_addr, 303 mask->sin_addr.s_addr)); 304 printf("%-17.17s ", 305 routename(sin->sin_addr.s_addr)); 306 307 network = true; 308 break; 309 } 310#ifdef INET6 311 case AF_INET6: 312 { 313 struct sockaddr_in6 *sin6, *mask; 314 315 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 316 mask = (struct sockaddr_in6 *)ifa->ifa_netmask; 317 318 printf("%-13.13s ", netname6(sin6, &mask->sin6_addr)); 319 getnameinfo(ifa->ifa_addr, ifa->ifa_addr->sa_len, 320 addr_buf, sizeof(addr_buf), 0, 0, NI_NUMERICHOST); 321 printf("%-17.17s ", addr_buf); 322 323 network = 1; 324 break; 325 } 326#endif /* INET6 */ 327 case AF_IPX: 328 { 329 struct sockaddr_ipx *sipx; 330 u_long net; 331 char netnum[10]; 332 333 sipx = (struct sockaddr_ipx *)ifa->ifa_addr; 334 *(union ipx_net *) &net = sipx->sipx_addr.x_net; 335 336 sprintf(netnum, "%lx", (u_long)ntohl(net)); 337 printf("ipx:%-8s ", netnum); 338 printf("%-17s ", ipx_phost((struct sockaddr *)sipx)); 339 340 network = 1; 341 break; 342 } 343 case AF_APPLETALK: 344 printf("atalk:%-12.12s ", 345 atalk_print(ifa->ifa_addr, 0x10)); 346 printf("%-11.11s ", 347 atalk_print(ifa->ifa_addr, 0x0b)); 348 break; 349 case AF_LINK: 350 { 351 struct sockaddr_dl *sdl; 352 char *cp, linknum[10]; 353 int n, m; 354 355 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 356 cp = (char *)LLADDR(sdl); 357 n = sdl->sdl_alen; 358 sprintf(linknum, "<Link#%d>", sdl->sdl_index); 359 m = printf("%-13.13s ", linknum); 360 361 while ((--n >= 0) && (m < 30)) 362 m += printf("%02x%c", *cp++ & 0xff, 363 n > 0 ? ':' : ' '); 364 m = 32 - m; 365 while (m-- > 0) 366 putchar(' '); 367 368 link = 1; 369 break; 370 } 371 } 372 373#define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s) 374 show_stat("lu", 8, IFA_STAT(ipackets), link|network, 1); 375 show_stat("lu", 5, IFA_STAT(ierrors), link, 1); 376 show_stat("lu", 5, IFA_STAT(iqdrops), link, 1); 377 if (bflag) 378 show_stat("lu", 10, IFA_STAT(ibytes), link|network, 0); 379 show_stat("lu", 8, IFA_STAT(opackets), link|network, 1); 380 show_stat("lu", 5, IFA_STAT(oerrors), link, 1); 381 if (bflag) 382 show_stat("lu", 10, IFA_STAT(obytes), link|network, 0); 383 show_stat("NRSlu", 5, IFA_STAT(collisions), link, 1); 384 if (dflag) 385 show_stat("LSlu", 5, IFA_STAT(oqdrops), link, 1); 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_od; /* output drops */ 464 u_long ift_co; /* collisions */ 465 u_long ift_ib; /* input bytes */ 466 u_long ift_ob; /* output bytes */ 467}; 468 469/* 470 * Obtain stats for interface(s). 471 */ 472static void 473fill_iftot(struct iftot *st) 474{ 475 struct ifaddrs *ifap, *ifa; 476 bool found = false; 477 478 if (getifaddrs(&ifap) != 0) 479 err(EX_OSERR, "getifaddrs"); 480 481 bzero(st, sizeof(*st)); 482 483 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 484 if (ifa->ifa_addr->sa_family != AF_LINK) 485 continue; 486 if (interface) { 487 if (strcmp(ifa->ifa_name, interface) == 0) 488 found = true; 489 else 490 continue; 491 } 492 493 st->ift_ip += IFA_STAT(ipackets); 494 st->ift_ie += IFA_STAT(ierrors); 495 st->ift_id += IFA_STAT(iqdrops); 496 st->ift_ib += IFA_STAT(ibytes); 497 st->ift_op += IFA_STAT(opackets); 498 st->ift_oe += IFA_STAT(oerrors); 499 st->ift_od += IFA_STAT(oqdrops); 500 st->ift_ob += IFA_STAT(obytes); 501 st->ift_co += IFA_STAT(collisions); 502 } 503 504 if (interface && found == false) 505 err(EX_DATAERR, "interface %s not found", interface); 506 507 freeifaddrs(ifap); 508} 509 510/* 511 * Set a flag to indicate that a signal from the periodic itimer has been 512 * caught. 513 */ 514static sig_atomic_t signalled; 515static void 516catchalarm(int signo __unused) 517{ 518 signalled = true; 519} 520 521/* 522 * Print a running summary of interface statistics. 523 * Repeat display every interval seconds, showing statistics 524 * collected over that interval. Assumes that interval is non-zero. 525 * First line printed at top of screen is always cumulative. 526 */ 527static void 528sidewaysintpr(int interval) 529{ 530 struct iftot ift[2], *new, *old; 531 struct itimerval interval_it; 532 int oldmask, line; 533 534 new = &ift[0]; 535 old = &ift[1]; 536 fill_iftot(old); 537 538 (void)signal(SIGALRM, catchalarm); 539 signalled = false; 540 interval_it.it_interval.tv_sec = interval; 541 interval_it.it_interval.tv_usec = 0; 542 interval_it.it_value = interval_it.it_interval; 543 setitimer(ITIMER_REAL, &interval_it, NULL); 544 545banner: 546 printf("%17s %14s %16s", "input", 547 interface != NULL ? interface : "(Total)", "output"); 548 putchar('\n'); 549 printf("%10s %5s %5s %10s %10s %5s %10s %5s", 550 "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes", 551 "colls"); 552 if (dflag) 553 printf(" %5.5s", "drops"); 554 putchar('\n'); 555 fflush(stdout); 556 line = 0; 557 558loop: 559 if ((noutputs != 0) && (--noutputs == 0)) 560 exit(0); 561 oldmask = sigblock(sigmask(SIGALRM)); 562 while (!signalled) 563 sigpause(0); 564 signalled = false; 565 sigsetmask(oldmask); 566 line++; 567 568 fill_iftot(new); 569 570 show_stat("lu", 10, new->ift_ip - old->ift_ip, 1, 1); 571 show_stat("lu", 5, new->ift_ie - old->ift_ie, 1, 1); 572 show_stat("lu", 5, new->ift_id - old->ift_id, 1, 1); 573 show_stat("lu", 10, new->ift_ib - old->ift_ib, 1, 0); 574 show_stat("lu", 10, new->ift_op - old->ift_op, 1, 1); 575 show_stat("lu", 5, new->ift_oe - old->ift_oe, 1, 1); 576 show_stat("lu", 10, new->ift_ob - old->ift_ob, 1, 0); 577 show_stat("NRSlu", 5, new->ift_co - old->ift_co, 1, 1); 578 if (dflag) 579 show_stat("LSlu", 5, new->ift_od - old->ift_od, 1, 1); 580 putchar('\n'); 581 fflush(stdout); 582 583 if (new == &ift[0]) { 584 new = &ift[1]; 585 old = &ift[0]; 586 } else { 587 new = &ift[0]; 588 old = &ift[1]; 589 } 590 591 if (line == 21) 592 goto banner; 593 else 594 goto loop; 595 596 /* NOTREACHED */ 597} 598