1 /* $FreeBSD: src/usr.sbin/gifconfig/gifconfig.c,v 1.2.2.4 2002/08/30 14:23:39 sobomax Exp $ */ 2 /* $KAME: gifconfig.c,v 1.14 2001/01/01 04:04:56 jinmei Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * gifconfig, derived from ifconfig 35 * 36 * @(#) Copyright (c) 1983, 1993\n\ 37 * The Regents of the University of California. All rights reserved.\n 38 * 39 * @(#)ifconfig.c 8.2 (Berkeley) 2/16/94 40 */ 41 42 /* 43 * 951109 - Andrew@pubnix.net - Changed to iterative buffer growing mechanism 44 * for ifconfig -a so all interfaces are queried. 45 * 46 * 960101 - peter@freebsd.org - Blow away the SIOCGIFCONF code and use 47 * sysctl() to get the structured interface conf 48 * and parse the messages in there. REALLY UGLY! 49 */ 50 51 #include <sys/param.h> 52 #include <sys/socket.h> 53 #include <sys/ioctl.h> 54 #include <sys/sysctl.h> 55 56 #include <net/if.h> 57 #if defined(__DragonFly__) 58 #include <net/if_var.h> 59 #endif /* __DragonFly__ */ 60 #include <net/if_dl.h> 61 #include <net/if_types.h> 62 #include <net/route.h> 63 #include <netinet/in.h> 64 #include <netinet/in_var.h> 65 #include <arpa/inet.h> 66 #include <netdb.h> 67 68 #include <sys/protosw.h> 69 70 #include <ctype.h> 71 #include <err.h> 72 #include <errno.h> 73 #include <stdio.h> 74 #include <stdlib.h> 75 #include <string.h> 76 #include <unistd.h> 77 #include <nlist.h> 78 #include <kvm.h> 79 #include <fcntl.h> 80 81 struct ifreq ifr; 82 struct ifaliasreq addreq; 83 #ifdef INET6 84 struct in6_ifreq in6_ifr; 85 struct in6_aliasreq in6_addreq; 86 #endif 87 88 char name[32]; 89 int flags; 90 int metric; 91 int mtu; 92 int setpsrc = 0; 93 int newaddr = 0; 94 int s; 95 kvm_t *kvmd; 96 97 #ifdef INET6 98 char ntop_buf[INET6_ADDRSTRLEN]; /*inet_ntop()*/ 99 #endif 100 101 void setifpsrc(char *, int); 102 void setifpdst(char *, int); 103 void setifflags(char *, int); 104 #ifdef SIOCDIFPHYADDR 105 void delifaddrs(char *, int); 106 #endif 107 108 #define NEXTARG 0xffffff 109 110 static struct cmd { 111 char *c_name; 112 int c_parameter; /* NEXTARG means next argv */ 113 void (*c_func)(char *, int); 114 } cmds[] = { 115 { "up", IFF_UP, setifflags } , 116 { "down", -IFF_UP, setifflags }, 117 #ifdef SIOCDIFPHYADDR 118 { "delete", 0, delifaddrs }, 119 #endif 120 { 0, 0, setifpsrc }, 121 { 0, 0, setifpdst }, 122 }; 123 124 /* 125 * XNS support liberally adapted from code written at the University of 126 * Maryland principally by James O'Toole and Chris Torek. 127 */ 128 void status(void); 129 void phys_status(int); 130 void in_status(int); 131 #ifdef INET6 132 void in6_status(int); 133 #endif 134 void ether_status(int); 135 void Perror(char *); 136 void in_getaddr(char *, int); 137 #ifdef INET6 138 void in6_getaddr(char *, int); 139 void in6_getprefix(char *, int); 140 #endif 141 void printb(char *, unsigned int, char *); 142 int prefix(void *, int); 143 144 char ntop_buf[INET6_ADDRSTRLEN]; 145 146 /* Known address families */ 147 struct afswtch { 148 char *af_name; 149 short af_af; 150 void (*af_status)(int); 151 void (*af_getaddr)(char *, int); 152 void (*af_getprefix)(char *, int); 153 u_long af_pifaddr; 154 caddr_t af_addreq; 155 caddr_t af_req; 156 } afs[] = { 157 #define C(x) ((caddr_t) &x) 158 { "inet", AF_INET, in_status, in_getaddr, 0, 159 SIOCSIFPHYADDR, C(addreq), C(ifr) }, 160 #ifdef INET6 161 { "inet6", AF_INET6, in6_status, in6_getaddr, in6_getprefix, 162 SIOCSIFPHYADDR_IN6, C(in6_addreq), C(in6_ifr) }, 163 #endif 164 { "ether", AF_INET, ether_status, NULL, NULL }, /* XXX not real!! */ 165 { 0, 0, 0, 0, 0 } 166 }; 167 168 struct afswtch *afp = NULL; /*the address family being set or asked about*/ 169 170 void rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *); 171 int ifconfig(int argc, char *argv[], int af, struct afswtch *rafp); 172 173 void 174 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 175 { 176 struct sockaddr *sa; 177 int i; 178 179 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); 180 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 181 if ((rtinfo->rti_addrs & (1 << i)) == 0) 182 continue; 183 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 184 RT_ADVANCE(cp, sa); 185 } 186 } 187 188 189 /* 190 * Grunge for new-style sysctl() decoding.. :-( 191 * Apologies to the world for committing gross things like this in 1996.. 192 */ 193 struct if_msghdr *ifm; 194 struct ifa_msghdr *ifam; 195 struct sockaddr_dl *sdl; 196 struct rt_addrinfo info; 197 char *buf, *lim, *next; 198 199 200 int 201 main(int argc, char **argv) 202 { 203 int af = AF_INET; 204 struct afswtch *rafp = NULL; 205 size_t needed; 206 int mib[6]; 207 int all; 208 209 if (argc < 2) { 210 fprintf(stderr, 211 "usage: gifconfig interface [af] [physsrc physdst]\n"); 212 #ifdef SIOCDIFPHYADDR 213 fprintf(stderr, 214 " gifconfig interface delete\n"); 215 #endif 216 fprintf(stderr, 217 " gifconfig -a\n"); 218 exit(1); 219 } 220 argc--, argv++; 221 strncpy(name, *argv, sizeof(name)); 222 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 223 argc--, argv++; 224 if (argc > 0) { 225 for (afp = rafp = afs; rafp->af_name; rafp++) 226 if (strcmp(rafp->af_name, *argv) == 0) { 227 afp = rafp; argc--; argv++; 228 break; 229 } 230 rafp = afp; 231 af = ifr.ifr_addr.sa_family = rafp->af_af; 232 } 233 234 mib[0] = CTL_NET; 235 mib[1] = PF_ROUTE; 236 mib[2] = 0; 237 mib[3] = 0; /* address family */ 238 mib[4] = NET_RT_IFLIST; 239 mib[5] = 0; 240 241 /* if particular family specified, only ask about it */ 242 if (afp) { 243 mib[3] = afp->af_af; 244 } 245 246 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 247 errx(1, "iflist-sysctl-estimate"); 248 if ((buf = malloc(needed)) == NULL) 249 errx(1, "malloc"); 250 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 251 errx(1, "actual retrieval of interface table"); 252 lim = buf + needed; 253 254 all = 0; 255 if (strcmp(name, "-a") == 0) 256 all = 1; /* All interfaces */ 257 else if (strcmp(name, "-au") == 0) 258 all = 2; /* All IFF_UPinterfaces */ 259 else if (strcmp(name, "-ad") == 0) 260 all = 3; /* All !IFF_UP interfaces */ 261 262 for (next = buf; next < lim; next += ifm->ifm_msglen) { 263 264 ifm = (struct if_msghdr *)next; 265 266 /* XXX: Swallow up leftover NEWADDR messages */ 267 if (ifm->ifm_type == RTM_NEWADDR) 268 continue; 269 270 if (ifm->ifm_type == RTM_IFINFO) { 271 sdl = (struct sockaddr_dl *)(ifm + 1); 272 flags = ifm->ifm_flags; 273 } else { 274 errx(1, "out of sync parsing NET_RT_IFLIST"); 275 } 276 277 switch(all) { 278 case -1: 279 case 0: 280 if (strlen(name) != sdl->sdl_nlen) 281 continue; /* not same len */ 282 if (strncmp(name, sdl->sdl_data, sdl->sdl_nlen) != 0) 283 continue; /* not same name */ 284 break; 285 case 1: 286 break; /* always do it */ 287 case 2: 288 if ((flags & IFF_UP) == 0) 289 continue; /* not up */ 290 break; 291 case 3: 292 if (flags & IFF_UP) 293 continue; /* not down */ 294 break; 295 } 296 297 /* 298 * Let's just do it for gif only 299 */ 300 if (sdl->sdl_type != IFT_GIF) { 301 if (all != 0) 302 continue; 303 304 fprintf(stderr, "gifconfig: %s is not gif.\n", 305 ifr.ifr_name); 306 exit(1); 307 } 308 309 if (all > 0) { 310 strncpy(name, sdl->sdl_data, sdl->sdl_nlen); 311 name[sdl->sdl_nlen] = '\0'; 312 } 313 314 if ((s = socket(af, SOCK_DGRAM, 0)) < 0) { 315 perror("gifconfig: socket"); 316 exit(1); 317 } 318 319 ifconfig(argc,argv,af,rafp); 320 321 close(s); 322 323 if (all == 0) { 324 all = -1; /* flag it as 'done' */ 325 break; 326 } 327 } 328 free(buf); 329 330 if (all == 0) 331 errx(1, "interface %s does not exist", name); 332 333 334 exit (0); 335 } 336 337 338 int 339 ifconfig(int argc, char **argv, int af, struct afswtch *rafp) 340 { 341 342 af = 0; /*fool gcc*/ 343 344 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 345 #ifdef INET6 346 strncpy(in6_ifr.ifr_name, name, sizeof in6_ifr.ifr_name); 347 #endif /* INET6 */ 348 349 if (ioctl(s, SIOCGIFMETRIC, (caddr_t)&ifr) < 0) 350 perror("ioctl (SIOCGIFMETRIC)"); 351 else 352 metric = ifr.ifr_metric; 353 354 #if defined(SIOCGIFMTU) && !defined(__OpenBSD__) 355 if (ioctl(s, SIOCGIFMTU, (caddr_t)&ifr) < 0) 356 perror("ioctl (SIOCGIFMTU)"); 357 else 358 mtu = ifr.ifr_mtu; 359 #else 360 mtu = 0; 361 #endif 362 363 if (argc == 0) { 364 status(); 365 return(0); 366 } 367 368 while (argc > 0) { 369 struct cmd *p; 370 371 for (p = cmds; p->c_name; p++) 372 if (strcmp(*argv, p->c_name) == 0) 373 break; 374 if (p->c_name == NULL && setpsrc) 375 p++; /* got src, do dst */ 376 if (p->c_func) { 377 if (p->c_parameter == NEXTARG) { 378 if (argv[1] == NULL) 379 errx(1, "'%s' requires argument", 380 p->c_name); 381 (*p->c_func)(argv[1], 0); 382 argc--, argv++; 383 } else 384 (*p->c_func)(*argv, p->c_parameter); 385 } 386 argc--, argv++; 387 } 388 if (newaddr) { 389 strncpy(rafp->af_addreq, name, sizeof ifr.ifr_name); 390 if (ioctl(s, rafp->af_pifaddr, rafp->af_addreq) < 0) 391 Perror("ioctl (SIOCSIFPHYADDR)"); 392 } 393 else if (setpsrc) { 394 errx(1, "destination is not specified"); 395 } 396 return(0); 397 } 398 #define PSRC 0 399 #define PDST 1 400 401 /*ARGSUSED*/ 402 void 403 setifpsrc(char *addr, int param) 404 { 405 param = 0; /*fool gcc*/ 406 (*afp->af_getaddr)(addr, PSRC); 407 setpsrc = 1; 408 } 409 410 /*ARGSUSED*/ 411 void 412 setifpdst(char *addr, int param) 413 { 414 param = 0; /*fool gcc*/ 415 (*afp->af_getaddr)(addr, PDST); 416 newaddr = 1; 417 } 418 419 void 420 setifflags(char *vname, int value) 421 { 422 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) { 423 Perror("ioctl (SIOCGIFFLAGS)"); 424 exit(1); 425 } 426 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 427 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); 428 429 if (value < 0) { 430 value = -value; 431 flags &= ~value; 432 } else 433 flags |= value; 434 ifr.ifr_flags = flags & 0xffff; 435 ifr.ifr_flagshigh = flags >> 16; 436 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) 437 Perror(vname); 438 } 439 440 #ifdef SIOCDIFPHYADDR 441 /* ARGSUSED */ 442 void 443 delifaddrs(char *vname, int param) 444 { 445 param = 0; /* fool gcc */ 446 vname = NULL; /* ditto */ 447 448 if (ioctl(s, SIOCDIFPHYADDR, (caddr_t)&ifr) < 0) 449 err(1, "ioctl(SIOCDIFPHYADDR)"); 450 } 451 #endif 452 453 #define IFFBITS \ 454 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS\7RUNNING\10NOARP\ 455 \11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2\20MULTICAST" 456 457 /* 458 * Print the status of the interface. If an address family was 459 * specified, show it and it only; otherwise, show them all. 460 */ 461 void 462 status(void) 463 { 464 struct afswtch *p = NULL; 465 char *mynext; 466 struct if_msghdr *myifm; 467 468 printf("%s: ", name); 469 printb("flags", flags, IFFBITS); 470 if (metric) 471 printf(" metric %d", metric); 472 if (mtu) 473 printf(" mtu %d", mtu); 474 putchar('\n'); 475 476 /* 477 * XXX: Sigh. This is bad, I know. At this point, we may have 478 * *zero* RTM_NEWADDR's, so we have to "feel the water" before 479 * incrementing the loop. One day, I might feel inspired enough 480 * to get the top level loop to pass a count down here so we 481 * dont have to mess with this. -Peter 482 */ 483 myifm = ifm; 484 485 while (1) { 486 487 mynext = next + ifm->ifm_msglen; 488 489 if (mynext >= lim) 490 break; 491 492 myifm = (struct if_msghdr *)mynext; 493 494 if (myifm->ifm_type != RTM_NEWADDR) 495 break; 496 497 next = mynext; 498 499 ifm = (struct if_msghdr *)next; 500 501 ifam = (struct ifa_msghdr *)myifm; 502 info.rti_addrs = ifam->ifam_addrs; 503 504 /* Expand the compacted addresses */ 505 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, 506 &info); 507 508 if (afp) { 509 if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family && 510 afp->af_status != ether_status) { 511 p = afp; 512 if (p->af_status != ether_status) 513 (*p->af_status)(1); 514 } 515 } else for (p = afs; p->af_name; p++) { 516 if (p->af_af == info.rti_info[RTAX_IFA]->sa_family && 517 p->af_status != ether_status) 518 (*p->af_status)(0); 519 } 520 } 521 if (afp == NULL || afp->af_status == ether_status) 522 ether_status(0); 523 else if (afp && !p) { 524 warnx("%s has no %s IFA address!", name, afp->af_name); 525 } 526 527 phys_status(0); 528 } 529 530 void 531 phys_status(int force) 532 { 533 char psrcaddr[256]; 534 char pdstaddr[256]; 535 int flags = NI_NUMERICHOST; 536 char *af; 537 #ifndef SIOCGLIFPHYADDR 538 u_long srccmd, dstcmd; 539 struct ifreq *ifrp; 540 #ifdef INET6 541 int s6; 542 #endif 543 544 force = 0; /*fool gcc*/ 545 546 psrcaddr[0] = pdstaddr[0] = '\0'; 547 548 #ifdef INET6 549 s6 = socket(AF_INET6, SOCK_DGRAM, 0); 550 if (s6 < 0) { 551 ifrp = 𝔦 552 srccmd = SIOCGIFPSRCADDR; 553 dstcmd = SIOCGIFPDSTADDR; 554 } else { 555 close(s6); 556 srccmd = SIOCGIFPSRCADDR_IN6; 557 dstcmd = SIOCGIFPDSTADDR_IN6; 558 ifrp = (struct ifreq *)&in6_ifr; 559 } 560 #else /* INET6 */ 561 ifrp = 𝔦 562 srccmd = SIOCGIFPSRCADDR; 563 dstcmd = SIOCGIFPDSTADDR; 564 #endif /* INET6 */ 565 566 if (0 <= ioctl(s, srccmd, (caddr_t)ifrp)) { 567 #ifdef INET6 568 if (ifrp->ifr_addr.sa_family == AF_INET6) 569 af = "inet6"; 570 else 571 af = "inet"; 572 #else 573 af = "inet"; 574 #endif /* INET6 */ 575 if (getnameinfo(&ifrp->ifr_addr, ifrp->ifr_addr.sa_len, 576 psrcaddr, sizeof(psrcaddr), 0, 0, flags) != 0) 577 psrcaddr[0] = '\0'; 578 } 579 if (0 <= ioctl(s, dstcmd, (caddr_t)ifrp)) { 580 if (getnameinfo(&ifrp->ifr_addr, ifrp->ifr_addr.sa_len, 581 pdstaddr, sizeof(pdstaddr), 0, 0, flags) != 0) 582 pdstaddr[0] = '\0'; 583 } 584 printf("\tphysical address %s %s --> %s\n", af, psrcaddr, pdstaddr); 585 #else 586 struct if_laddrreq iflr; 587 588 force = 0; /*fool gcc*/ 589 590 psrcaddr[0] = pdstaddr[0] = '\0'; 591 592 memset(&iflr, 0, sizeof(iflr)); 593 memcpy(iflr.iflr_name, ifr.ifr_name, sizeof(iflr.iflr_name)); 594 595 if (0 <= ioctl(s, SIOCGLIFPHYADDR, (caddr_t)&iflr)) { 596 switch (iflr.addr.ss_family) { 597 case AF_INET: 598 af = "inet"; 599 break; 600 #ifdef INET6 601 case AF_INET6: 602 af = "inet6"; 603 break; 604 #endif /* INET6 */ 605 } 606 if (getnameinfo((struct sockaddr *)&iflr.addr, iflr.addr.ss_len, 607 psrcaddr, sizeof(psrcaddr), 0, 0, flags) != 0) 608 psrcaddr[0] = '\0'; 609 if (getnameinfo((struct sockaddr *)&iflr.dstaddr, 610 iflr.dstaddr.ss_len, pdstaddr, sizeof(pdstaddr), 0, 0, 611 flags) != 0) 612 pdstaddr[0] = '\0'; 613 } 614 printf("\tphysical address %s %s --> %s\n", af, psrcaddr, pdstaddr); 615 #endif 616 } 617 618 void 619 in_status(int force) 620 { 621 struct sockaddr_in *sin, null_sin; 622 #if 0 623 char *inet_ntoa(); 624 #endif 625 626 memset(&null_sin, 0, sizeof(null_sin)); 627 628 sin = (struct sockaddr_in *)info.rti_info[RTAX_IFA]; 629 if (!sin || sin->sin_family != AF_INET) { 630 if (!force) 631 return; 632 /* warnx("%s has no AF_INET IFA address!", name); */ 633 sin = &null_sin; 634 } 635 printf("\tinet %s ", inet_ntoa(sin->sin_addr)); 636 637 if (flags & IFF_POINTOPOINT) { 638 /* note RTAX_BRD overlap with IFF_BROADCAST */ 639 sin = (struct sockaddr_in *)info.rti_info[RTAX_BRD]; 640 if (!sin) 641 sin = &null_sin; 642 printf("--> %s ", inet_ntoa(sin->sin_addr)); 643 } 644 645 sin = (struct sockaddr_in *)info.rti_info[RTAX_NETMASK]; 646 if (!sin) 647 sin = &null_sin; 648 printf("netmask 0x%x ", (u_int32_t)ntohl(sin->sin_addr.s_addr)); 649 650 if (flags & IFF_BROADCAST) { 651 /* note RTAX_BRD overlap with IFF_POINTOPOINT */ 652 sin = (struct sockaddr_in *)info.rti_info[RTAX_BRD]; 653 if (sin && sin->sin_addr.s_addr != 0) 654 printf("broadcast %s", inet_ntoa(sin->sin_addr)); 655 } 656 putchar('\n'); 657 } 658 659 #ifdef INET6 660 void 661 in6_status(int force) 662 { 663 struct sockaddr_in6 *sin, null_sin; 664 char hostname[NI_MAXHOST]; 665 int niflags = NI_NUMERICHOST; 666 667 memset(&null_sin, 0, sizeof(null_sin)); 668 #ifdef NI_WITHSCOPEID 669 niflags |= NI_WITHSCOPEID; 670 #endif 671 672 sin = (struct sockaddr_in6 *)info.rti_info[RTAX_IFA]; 673 if (!sin || sin->sin6_family != AF_INET6) { 674 if (!force) 675 return; 676 /* warnx("%s has no AF_INET6 IFA address!", name); */ 677 sin = &null_sin; 678 } 679 #ifdef __KAME__ 680 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 681 sin->sin6_scope_id = 682 ntohs(*(u_int16_t *)&sin->sin6_addr.s6_addr[2]); 683 sin->sin6_addr.s6_addr[2] = 0; 684 sin->sin6_addr.s6_addr[3] = 0; 685 } 686 #endif 687 getnameinfo((struct sockaddr *)sin, sin->sin6_len, 688 hostname, sizeof(hostname), 0, 0, niflags); 689 printf("\tinet6 %s ", hostname); 690 691 if (flags & IFF_POINTOPOINT) { 692 /* note RTAX_BRD overlap with IFF_BROADCAST */ 693 sin = (struct sockaddr_in6 *)info.rti_info[RTAX_BRD]; 694 /* 695 * some of ther interfaces do not have valid destination 696 * address. 697 */ 698 if (sin->sin6_family == AF_INET6) { 699 #ifdef __KAME__ 700 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { 701 sin->sin6_scope_id = 702 ntohs(*(u_int16_t *)&sin->sin6_addr.s6_addr[2]); 703 sin->sin6_addr.s6_addr[2] = 0; 704 sin->sin6_addr.s6_addr[3] = 0; 705 } 706 #endif 707 getnameinfo((struct sockaddr *)sin, sin->sin6_len, 708 hostname, sizeof(hostname), 0, 0, niflags); 709 printf("--> %s ", hostname); 710 } 711 } 712 713 sin = (struct sockaddr_in6 *)info.rti_info[RTAX_NETMASK]; 714 if (!sin) 715 sin = &null_sin; 716 printf(" prefixlen %d ", prefix(&sin->sin6_addr, 717 sizeof(struct in6_addr))); 718 719 putchar('\n'); 720 } 721 #endif /*INET6*/ 722 723 /*ARGSUSED*/ 724 void 725 ether_status(int dummy) 726 { 727 char *cp; 728 int n; 729 730 dummy = 0; /*fool gcc*/ 731 732 cp = (char *)LLADDR(sdl); 733 if ((n = sdl->sdl_alen) > 0) { 734 if (sdl->sdl_type == IFT_ETHER) 735 printf ("\tether "); 736 else 737 printf ("\tlladdr "); 738 while (--n >= 0) 739 printf("%02x%c",*cp++ & 0xff, n>0? ':' : ' '); 740 putchar('\n'); 741 } 742 } 743 744 void 745 Perror(char *cmd) 746 { 747 switch (errno) { 748 749 case ENXIO: 750 errx(1, "%s: no such interface", cmd); 751 break; 752 753 case EPERM: 754 errx(1, "%s: permission denied", cmd); 755 break; 756 757 default: 758 err(1, "%s", cmd); 759 } 760 } 761 762 #define SIN(x) ((struct sockaddr_in *) &(x)) 763 struct sockaddr_in *sintab[] = { 764 SIN(addreq.ifra_addr), SIN(addreq.ifra_dstaddr)}; 765 766 void 767 in_getaddr(char *s, int which) 768 { 769 struct sockaddr_in *sin = sintab[which]; 770 struct hostent *hp; 771 struct netent *np; 772 773 sin->sin_len = sizeof(*sin); 774 sin->sin_family = AF_INET; 775 776 if (inet_aton(s, &sin->sin_addr)) 777 ; 778 else if ((hp = gethostbyname(s)) != NULL) 779 bcopy(hp->h_addr, (char *)&sin->sin_addr, hp->h_length); 780 else if ((np = getnetbyname(s)) != NULL) 781 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 782 else 783 errx(1, "%s: bad value", s); 784 } 785 786 #ifdef INET6 787 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 788 struct sockaddr_in6 *sin6tab[] = { 789 SIN6(in6_addreq.ifra_addr), SIN6(in6_addreq.ifra_dstaddr)}; 790 791 void 792 in6_getaddr(char *s, int which) 793 { 794 struct sockaddr_in6 *sin = sin6tab[which]; 795 796 sin->sin6_len = sizeof(*sin); 797 sin->sin6_family = AF_INET6; 798 799 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 800 errx(1, "%s: bad value", s); 801 } 802 803 void 804 in6_getprefix(char *plen, int which) 805 { 806 struct sockaddr_in6 *sin = sin6tab[which]; 807 u_char *cp; 808 int len = atoi(plen); 809 810 if ((len < 0) || (len > 128)) 811 errx(1, "%s: bad value", plen); 812 sin->sin6_len = sizeof(*sin); 813 sin->sin6_family = AF_INET6; 814 if ((len == 0) || (len == 128)) { 815 memset(&sin->sin6_addr, -1, sizeof(struct in6_addr)); 816 return; 817 } 818 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 819 *cp++ = -1; 820 *cp = (-1) << (8 - len); 821 } 822 #endif 823 824 /* 825 * Print a value a la the %b format of the kernel's printf 826 */ 827 void 828 printb(char *s, unsigned int v, char *bits) 829 { 830 int i, any = 0; 831 char c; 832 833 if (bits && *bits == 8) 834 printf("%s=%o", s, v & 0xffff); 835 else 836 printf("%s=%x", s, v & 0xffff); 837 bits++; 838 if (bits) { 839 putchar('<'); 840 while ((i = *bits++) != 0) { 841 if ((v & (1 << (i-1))) != 0) { 842 if (any) 843 putchar(','); 844 any = 1; 845 for (; (c = *bits) > 32; bits++) 846 putchar(c); 847 } else 848 for (; *bits > 32; bits++) 849 ; 850 } 851 putchar('>'); 852 } 853 } 854 855 #ifdef INET6 856 int 857 prefix(void *val, int size) 858 { 859 u_char *name = (u_char *)val; 860 int byte, bit, plen = 0; 861 862 for (byte = 0; byte < size; byte++, plen += 8) 863 if (name[byte] != 0xff) 864 break; 865 if (byte == size) 866 return (plen); 867 for (bit = 7; bit != 0; bit--, plen++) 868 if (!(name[byte] & (1 << bit))) 869 break; 870 for (; bit != 0; bit--) 871 if (name[byte] & (1 << bit)) 872 return(0); 873 byte++; 874 for (; byte < size; byte++) 875 if (name[byte]) 876 return(0); 877 return (plen); 878 } 879 #endif /*INET6*/ 880