usr.sbin/gifconfig/gifconfig.c

   1 /*      $FreeBSD: src/usr.sbin/gifconfig/gifconfig.c,v 1.2.2.4 2002/08/30 14:23:39 sobomax Exp $        */
   2 /*      $DragonFly: src/usr.sbin/gifconfig/gifconfig.c,v 1.6 2004/03/24 18:23:46 cpressey Exp $ */
   3 /*      $KAME: gifconfig.c,v 1.14 2001/01/01 04:04:56 jinmei Exp $      */
   4
   5 /*
   6  * Copyright (c) 1983, 1993
   7  *      The Regents of the University of California.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by the University of
  20  *      California, Berkeley and its contributors.
  21  * 4. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * gifconfig, derived from ifconfig
  40  *
  41  * @(#) Copyright (c) 1983, 1993\n\
  42  *      The Regents of the University of California.  All rights reserved.\n
  43  *
  44  * @(#)ifconfig.c       8.2 (Berkeley) 2/16/94
  45  */
  46
  47 /*
  48  *  951109 - Andrew@pubnix.net - Changed to iterative buffer growing mechanism
  49  *                               for ifconfig -a so all interfaces are queried.
  50  *
  51  *  960101 - peter@freebsd.org - Blow away the SIOCGIFCONF code and use
  52  *                               sysctl() to get the structured interface conf
  53  *                               and parse the messages in there. REALLY UGLY!
  54  */
  55
  56 #include <sys/param.h>
  57 #include <sys/socket.h>
  58 #include <sys/ioctl.h>
  59 #include <sys/sysctl.h>
  60
  61 #include <net/if.h>
  62 #if defined(__DragonFly__)
  63 #include <net/if_var.h>
  64 #endif /* __DragonFly__ */
  65 #include <net/if_dl.h>
  66 #include <net/if_types.h>
  67 #include <net/route.h>
  68 #include <netinet/in.h>
  69 #include <netinet/in_var.h>
  70 #include <arpa/inet.h>
  71 #include <netdb.h>
  72
  73 #include <sys/protosw.h>
  74
  75 #include <ctype.h>
  76 #include <err.h>
  77 #include <errno.h>
  78 #include <stdio.h>
  79 #include <stdlib.h>
  80 #include <string.h>
  81 #include <unistd.h>
  82 #include <nlist.h>
  83 #include <kvm.h>
  84 #include <fcntl.h>
  85
  86 struct  ifreq           ifr;
  87 struct  ifaliasreq      addreq;
  88 #ifdef INET6
  89 struct  in6_ifreq       in6_ifr;
  90 struct  in6_aliasreq    in6_addreq;
  91 #endif
  92
  93 char    name[32];
  94 int     flags;
  95 int     metric;
  96 int     mtu;
  97 int     setpsrc = 0;
  98 int     newaddr = 0;
  99 int     s;
 100 kvm_t   *kvmd;
 101
 102 #ifdef INET6
 103 char ntop_buf[INET6_ADDRSTRLEN];        /*inet_ntop()*/
 104 #endif
 105
 106 void setifpsrc(char *, int);
 107 void setifpdst(char *, int);
 108 void setifflags(char *, int);
 109 #ifdef SIOCDIFPHYADDR
 110 void delifaddrs(char *, int);
 111 #endif
 112
 113 #define NEXTARG         0xffffff
 114
 115 static struct   cmd {
 116         char    *c_name;
 117         int     c_parameter;            /* NEXTARG means next argv */
 118         void    (*c_func)(char *, int);
 119 } cmds[] = {
 120         { "up",         IFF_UP,         setifflags } ,
 121         { "down",       -IFF_UP,        setifflags },
 122 #ifdef SIOCDIFPHYADDR
 123         { "delete",     0,              delifaddrs },
 124 #endif
 125         { 0,            0,              setifpsrc },
 126         { 0,            0,              setifpdst },
 127 };
 128
 129 /*
 130  * XNS support liberally adapted from code written at the University of
 131  * Maryland principally by James O'Toole and Chris Torek.
 132  */
 133 int main(int, char *[]);
 134 void status(void);
 135 void phys_status(int);
 136 void in_status(int);
 137 #ifdef INET6
 138 void in6_status(int);
 139 #endif
 140 void ether_status(int);
 141 void Perror(char *);
 142 void in_getaddr(char *, int);
 143 #ifdef INET6
 144 void in6_getaddr(char *, int);
 145 void in6_getprefix(char *, int);
 146 #endif
 147 void printb(char *, unsigned int, char *);
 148 int prefix(void *, int);
 149
 150 char ntop_buf[INET6_ADDRSTRLEN];
 151
 152 /* Known address families */
 153 struct afswtch {
 154         char *af_name;
 155         short af_af;
 156         void (*af_status)(int);
 157         void (*af_getaddr)(char *, int);
 158         void (*af_getprefix)(char *, int);
 159         u_long af_pifaddr;
 160         caddr_t af_addreq;
 161         caddr_t af_req;
 162 } afs[] = {
 163 #define C(x) ((caddr_t) &x)
 164         { "inet", AF_INET, in_status, in_getaddr, 0,
 165              SIOCSIFPHYADDR, C(addreq), C(ifr) },
 166 #ifdef INET6
 167         { "inet6", AF_INET6, in6_status, in6_getaddr, in6_getprefix,
 168              SIOCSIFPHYADDR_IN6, C(in6_addreq), C(in6_ifr) },
 169 #endif
 170         { "ether", AF_INET, ether_status, NULL, NULL }, /* XXX not real!! */
 171         { 0,    0,          0,          0,      0 }
 172 };
 173
 174 struct afswtch *afp = NULL;     /*the address family being set or asked about*/
 175
 176 void    rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *);
 177 int     ifconfig(int argc, char *argv[], int af, struct afswtch *rafp);
 178
 179
 180
 181 /*
 182  * Expand the compacted form of addresses as returned via the
 183  * configuration read via sysctl().
 184  */
 185
 186 #define ROUNDUP(a) \
 187         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 188 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 189
 190 void
 191 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
 192 {
 193         struct sockaddr *sa;
 194         int i;
 195
 196         memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info));
 197         for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
 198                 if ((rtinfo->rti_addrs & (1 << i)) == 0)
 199                         continue;
 200                 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
 201                 ADVANCE(cp, sa);
 202         }
 203 }
 204
 205
 206 /*
 207  * Grunge for new-style sysctl() decoding.. :-(
 208  * Apologies to the world for committing gross things like this in 1996..
 209  */
 210 struct if_msghdr *ifm;
 211 struct ifa_msghdr *ifam;
 212 struct sockaddr_dl *sdl;
 213 struct rt_addrinfo info;
 214 char *buf, *lim, *next;
 215
 216
 217 int
 218 main(int argc, char **argv)
 219 {
 220         int af = AF_INET;
 221         struct afswtch *rafp = NULL;
 222         size_t needed;
 223         int mib[6];
 224         int all;
 225
 226         if (argc < 2) {
 227                 fprintf(stderr,
 228                     "usage: gifconfig interface [af] [physsrc physdst]\n");
 229 #ifdef SIOCDIFPHYADDR
 230                 fprintf(stderr,
 231                     "       gifconfig interface delete\n");
 232 #endif
 233                 fprintf(stderr,
 234                     "       gifconfig -a\n");
 235                 exit(1);
 236         }
 237         argc--, argv++;
 238         strncpy(name, *argv, sizeof(name));
 239         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 240         argc--, argv++;
 241         if (argc > 0) {
 242                 for (afp = rafp = afs; rafp->af_name; rafp++)
 243                         if (strcmp(rafp->af_name, *argv) == 0) {
 244                                 afp = rafp; argc--; argv++;
 245                                 break;
 246                         }
 247                 rafp = afp;
 248                 af = ifr.ifr_addr.sa_family = rafp->af_af;
 249         }
 250
 251         mib[0] = CTL_NET;
 252         mib[1] = PF_ROUTE;
 253         mib[2] = 0;
 254         mib[3] = 0;     /* address family */
 255         mib[4] = NET_RT_IFLIST;
 256         mib[5] = 0;
 257
 258         /* if particular family specified, only ask about it */
 259         if (afp) {
 260                 mib[3] = afp->af_af;
 261         }
 262
 263         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 264                 errx(1, "iflist-sysctl-estimate");
 265         if ((buf = malloc(needed)) == NULL)
 266                 errx(1, "malloc");
 267         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 268                 errx(1, "actual retrieval of interface table");
 269         lim = buf + needed;
 270
 271         all = 0;
 272         if (strcmp(name, "-a") == 0)
 273                 all = 1;        /* All interfaces */
 274         else if (strcmp(name, "-au") == 0)
 275                 all = 2;        /* All IFF_UPinterfaces */
 276         else if (strcmp(name, "-ad") == 0)
 277                 all = 3;        /* All !IFF_UP interfaces */
 278
 279         for (next = buf; next < lim; next += ifm->ifm_msglen) {
 280
 281                 ifm = (struct if_msghdr *)next;
 282
 283                 /* XXX: Swallow up leftover NEWADDR messages */
 284                 if (ifm->ifm_type == RTM_NEWADDR)
 285                         continue;
 286
 287                 if (ifm->ifm_type == RTM_IFINFO) {
 288                         sdl = (struct sockaddr_dl *)(ifm + 1);
 289                         flags = ifm->ifm_flags;
 290                 } else {
 291                         errx(1, "out of sync parsing NET_RT_IFLIST");
 292                 }
 293
 294                 switch(all) {
 295                 case -1:
 296                 case 0:
 297                         if (strlen(name) != sdl->sdl_nlen)
 298                                 continue; /* not same len */
 299                         if (strncmp(name, sdl->sdl_data, sdl->sdl_nlen) != 0)
 300                                 continue; /* not same name */
 301                         break;
 302                 case 1:
 303                         break;  /* always do it */
 304                 case 2:
 305                         if ((flags & IFF_UP) == 0)
 306                                 continue; /* not up */
 307                         break;
 308                 case 3:
 309                         if (flags & IFF_UP)
 310                                 continue; /* not down */
 311                         break;
 312                 }
 313
 314                 /*
 315                  * Let's just do it for gif only
 316                  */
 317                 if (sdl->sdl_type != IFT_GIF) {
 318                         if (all != 0)
 319                                 continue;
 320
 321                         fprintf(stderr, "gifconfig: %s is not gif.\n",
 322                                 ifr.ifr_name);
 323                         exit(1);
 324                 }
 325
 326                 if (all > 0) {
 327                         strncpy(name, sdl->sdl_data, sdl->sdl_nlen);
 328                         name[sdl->sdl_nlen] = '\0';
 329                 }
 330
 331                 if ((s = socket(af, SOCK_DGRAM, 0)) < 0) {
 332                         perror("gifconfig: socket");
 333                         exit(1);
 334                 }
 335
 336                 ifconfig(argc,argv,af,rafp);
 337
 338                 close(s);
 339
 340                 if (all == 0) {
 341                         all = -1; /* flag it as 'done' */
 342                         break;
 343                 }
 344         }
 345         free(buf);
 346
 347         if (all == 0)
 348                 errx(1, "interface %s does not exist", name);
 349
 350
 351         exit (0);
 352 }
 353
 354
 355 int
 356 ifconfig(int argc, char **argv, int af, struct afswtch *rafp)
 357 {
 358
 359         af = 0;         /*fool gcc*/
 360
 361         strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
 362 #ifdef INET6
 363         strncpy(in6_ifr.ifr_name, name, sizeof in6_ifr.ifr_name);
 364 #endif /* INET6 */
 365
 366         if (ioctl(s, SIOCGIFMETRIC, (caddr_t)&ifr) < 0)
 367                 perror("ioctl (SIOCGIFMETRIC)");
 368         else
 369                 metric = ifr.ifr_metric;
 370
 371 #if defined(SIOCGIFMTU) && !defined(__OpenBSD__)
 372         if (ioctl(s, SIOCGIFMTU, (caddr_t)&ifr) < 0)
 373                 perror("ioctl (SIOCGIFMTU)");
 374         else
 375                 mtu = ifr.ifr_mtu;
 376 #else
 377         mtu = 0;
 378 #endif
 379
 380         if (argc == 0) {
 381                 status();
 382                 return(0);
 383         }
 384
 385         while (argc > 0) {
 386                 struct cmd *p;
 387
 388                 for (p = cmds; p->c_name; p++)
 389                         if (strcmp(*argv, p->c_name) == 0)
 390                                 break;
 391                 if (p->c_name == 0 && setpsrc)
 392                         p++;    /* got src, do dst */
 393                 if (p->c_func) {
 394                         if (p->c_parameter == NEXTARG) {
 395                                 if (argv[1] == NULL)
 396                                         errx(1, "'%s' requires argument",
 397                                             p->c_name);
 398                                 (*p->c_func)(argv[1], 0);
 399                                 argc--, argv++;
 400                         } else
 401                                 (*p->c_func)(*argv, p->c_parameter);
 402                 }
 403                 argc--, argv++;
 404         }
 405         if (newaddr) {
 406                 strncpy(rafp->af_addreq, name, sizeof ifr.ifr_name);
 407                 if (ioctl(s, rafp->af_pifaddr, rafp->af_addreq) < 0)
 408                         Perror("ioctl (SIOCSIFPHYADDR)");
 409         }
 410         else if (setpsrc) {
 411                 errx(1, "destination is not specified");
 412         }
 413         return(0);
 414 }
 415 #define PSRC    0
 416 #define PDST    1
 417
 418 /*ARGSUSED*/
 419 void
 420 setifpsrc(char *addr, int param)
 421 {
 422         param = 0;      /*fool gcc*/
 423         (*afp->af_getaddr)(addr, PSRC);
 424         setpsrc = 1;
 425 }
 426
 427 /*ARGSUSED*/
 428 void
 429 setifpdst(char *addr, int param)
 430 {
 431         param = 0;      /*fool gcc*/
 432         (*afp->af_getaddr)(addr, PDST);
 433         newaddr = 1;
 434 }
 435
 436 void
 437 setifflags(char *vname, int value)
 438 {
 439         if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
 440                 Perror("ioctl (SIOCGIFFLAGS)");
 441                 exit(1);
 442         }
 443         strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
 444         flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
 445
 446         if (value < 0) {
 447                 value = -value;
 448                 flags &= ~value;
 449         } else
 450                 flags |= value;
 451         ifr.ifr_flags = flags & 0xffff;
 452         ifr.ifr_flagshigh = flags >> 16;
 453         if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0)
 454                 Perror(vname);
 455 }
 456
 457 #ifdef SIOCDIFPHYADDR
 458 /* ARGSUSED */
 459 void
 460 delifaddrs(char *vname, int param)
 461 {
 462         param = 0;              /* fool gcc */
 463         vname = NULL;           /* ditto */
 464
 465         if (ioctl(s, SIOCDIFPHYADDR, (caddr_t)&ifr) < 0)
 466                 err(1, "ioctl(SIOCDIFPHYADDR)");
 467 }
 468 #endif
 469
 470 #define IFFBITS \
 471 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS\7RUNNING\10NOARP\
 472 \11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2\20MULTICAST"
 473
 474 /*
 475  * Print the status of the interface.  If an address family was
 476  * specified, show it and it only; otherwise, show them all.
 477  */
 478 void
 479 status(void)
 480 {
 481         struct afswtch *p = NULL;
 482         char *mynext;
 483         struct if_msghdr *myifm;
 484
 485         printf("%s: ", name);
 486         printb("flags", flags, IFFBITS);
 487         if (metric)
 488                 printf(" metric %d", metric);
 489         if (mtu)
 490                 printf(" mtu %d", mtu);
 491         putchar('\n');
 492
 493         /*
 494          * XXX: Sigh. This is bad, I know.  At this point, we may have
 495          * *zero* RTM_NEWADDR's, so we have to "feel the water" before
 496          * incrementing the loop.  One day, I might feel inspired enough
 497          * to get the top level loop to pass a count down here so we
 498          * dont have to mess with this.  -Peter
 499          */
 500         myifm = ifm;
 501
 502         while (1) {
 503
 504                 mynext = next + ifm->ifm_msglen;
 505
 506                 if (mynext >= lim)
 507                         break;
 508
 509                 myifm = (struct if_msghdr *)mynext;
 510
 511                 if (myifm->ifm_type != RTM_NEWADDR)
 512                         break;
 513
 514                 next = mynext;
 515
 516                 ifm = (struct if_msghdr *)next;
 517
 518                 ifam = (struct ifa_msghdr *)myifm;
 519                 info.rti_addrs = ifam->ifam_addrs;
 520
 521                 /* Expand the compacted addresses */
 522                 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam,
 523                           &info);
 524
 525                 if (afp) {
 526                         if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family &&
 527                             afp->af_status != ether_status) {
 528                                 p = afp;
 529                                 if (p->af_status != ether_status)
 530                                         (*p->af_status)(1);
 531                         }
 532                 } else for (p = afs; p->af_name; p++) {
 533                         if (p->af_af == info.rti_info[RTAX_IFA]->sa_family &&
 534                             p->af_status != ether_status)
 535                                 (*p->af_status)(0);
 536                 }
 537         }
 538         if (afp == NULL || afp->af_status == ether_status)
 539                 ether_status(0);
 540         else if (afp && !p) {
 541                 warnx("%s has no %s IFA address!", name, afp->af_name);
 542         }
 543
 544         phys_status(0);
 545 }
 546
 547 void
 548 phys_status(int force)
 549 {
 550         char psrcaddr[256];
 551         char pdstaddr[256];
 552         int flags = NI_NUMERICHOST;
 553         char *af;
 554 #ifndef SIOCGLIFPHYADDR
 555         u_long srccmd, dstcmd;
 556         struct ifreq *ifrp;
 557 #ifdef INET6
 558         int s6;
 559 #endif
 560
 561         force = 0;      /*fool gcc*/
 562
 563         psrcaddr[0] = pdstaddr[0] = '\0';
 564
 565 #ifdef INET6
 566         s6 = socket(AF_INET6, SOCK_DGRAM, 0);
 567         if (s6 < 0) {
 568                 ifrp = &ifr;
 569                 srccmd = SIOCGIFPSRCADDR;
 570                 dstcmd = SIOCGIFPDSTADDR;
 571         } else {
 572                 close(s6);
 573                 srccmd = SIOCGIFPSRCADDR_IN6;
 574                 dstcmd = SIOCGIFPDSTADDR_IN6;
 575                 ifrp = (struct ifreq *)&in6_ifr;
 576         }
 577 #else /* INET6 */
 578         ifrp = &ifr;
 579         srccmd = SIOCGIFPSRCADDR;
 580         dstcmd = SIOCGIFPDSTADDR;
 581 #endif /* INET6 */
 582
 583         if (0 <= ioctl(s, srccmd, (caddr_t)ifrp)) {
 584 #ifdef INET6
 585                 if (ifrp->ifr_addr.sa_family == AF_INET6)
 586                         af = "inet6";
 587                 else
 588                         af = "inet";
 589 #else
 590                 af = "inet";
 591 #endif /* INET6 */
 592                 if (getnameinfo(&ifrp->ifr_addr, ifrp->ifr_addr.sa_len,
 593                     psrcaddr, sizeof(psrcaddr), 0, 0, flags) != 0)
 594                         psrcaddr[0] = '\0';
 595         }
 596         if (0 <= ioctl(s, dstcmd, (caddr_t)ifrp)) {
 597                 if (getnameinfo(&ifrp->ifr_addr, ifrp->ifr_addr.sa_len,
 598                     pdstaddr, sizeof(pdstaddr), 0, 0, flags) != 0)
 599                         pdstaddr[0] = '\0';
 600         }
 601         printf("\tphysical address %s %s --> %s\n", af, psrcaddr, pdstaddr);
 602 #else
 603         struct if_laddrreq iflr;
 604
 605         force = 0;      /*fool gcc*/
 606
 607         psrcaddr[0] = pdstaddr[0] = '\0';
 608
 609         memset(&iflr, 0, sizeof(iflr));
 610         memcpy(iflr.iflr_name, ifr.ifr_name, sizeof(iflr.iflr_name));
 611
 612         if (0 <= ioctl(s, SIOCGLIFPHYADDR, (caddr_t)&iflr)) {
 613                 switch (iflr.addr.ss_family) {
 614                 case AF_INET:
 615                         af = "inet";
 616                         break;
 617 #ifdef INET6
 618                 case AF_INET6:
 619                         af = "inet6";
 620                         break;
 621 #endif /* INET6 */
 622                 }
 623                 if (getnameinfo((struct sockaddr *)&iflr.addr, iflr.addr.ss_len,
 624                     psrcaddr, sizeof(psrcaddr), 0, 0, flags) != 0)
 625                         psrcaddr[0] = '\0';
 626                 if (getnameinfo((struct sockaddr *)&iflr.dstaddr,
 627                     iflr.dstaddr.ss_len, pdstaddr, sizeof(pdstaddr), 0, 0,
 628                     flags) != 0)
 629                         pdstaddr[0] = '\0';
 630         }
 631         printf("\tphysical address %s %s --> %s\n", af, psrcaddr, pdstaddr);
 632 #endif
 633 }
 634
 635 void
 636 in_status(int force)
 637 {
 638         struct sockaddr_in *sin, null_sin;
 639 #if 0
 640         char *inet_ntoa();
 641 #endif
 642
 643         memset(&null_sin, 0, sizeof(null_sin));
 644
 645         sin = (struct sockaddr_in *)info.rti_info[RTAX_IFA];
 646         if (!sin || sin->sin_family != AF_INET) {
 647                 if (!force)
 648                         return;
 649                 /* warnx("%s has no AF_INET IFA address!", name); */
 650                 sin = &null_sin;
 651         }
 652         printf("\tinet %s ", inet_ntoa(sin->sin_addr));
 653
 654         if (flags & IFF_POINTOPOINT) {
 655                 /* note RTAX_BRD overlap with IFF_BROADCAST */
 656                 sin = (struct sockaddr_in *)info.rti_info[RTAX_BRD];
 657                 if (!sin)
 658                         sin = &null_sin;
 659                 printf("--> %s ", inet_ntoa(sin->sin_addr));
 660         }
 661
 662         sin = (struct sockaddr_in *)info.rti_info[RTAX_NETMASK];
 663         if (!sin)
 664                 sin = &null_sin;
 665         printf("netmask 0x%x ", (u_int32_t)ntohl(sin->sin_addr.s_addr));
 666
 667         if (flags & IFF_BROADCAST) {
 668                 /* note RTAX_BRD overlap with IFF_POINTOPOINT */
 669                 sin = (struct sockaddr_in *)info.rti_info[RTAX_BRD];
 670                 if (sin && sin->sin_addr.s_addr != 0)
 671                         printf("broadcast %s", inet_ntoa(sin->sin_addr));
 672         }
 673         putchar('\n');
 674 }
 675
 676 #ifdef INET6
 677 void
 678 in6_status(int force)
 679 {
 680         struct sockaddr_in6 *sin, null_sin;
 681         char hostname[NI_MAXHOST];
 682         int niflags = NI_NUMERICHOST;
 683
 684         memset(&null_sin, 0, sizeof(null_sin));
 685 #ifdef NI_WITHSCOPEID
 686         niflags |= NI_WITHSCOPEID;
 687 #endif
 688
 689         sin = (struct sockaddr_in6 *)info.rti_info[RTAX_IFA];
 690         if (!sin || sin->sin6_family != AF_INET6) {
 691                 if (!force)
 692                         return;
 693                 /* warnx("%s has no AF_INET6 IFA address!", name); */
 694                 sin = &null_sin;
 695         }
 696 #ifdef __KAME__
 697         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 698                 sin->sin6_scope_id =
 699                         ntohs(*(u_int16_t *)&sin->sin6_addr.s6_addr[2]);
 700                 sin->sin6_addr.s6_addr[2] = 0;
 701                 sin->sin6_addr.s6_addr[3] = 0;
 702         }
 703 #endif
 704         getnameinfo((struct sockaddr *)sin, sin->sin6_len,
 705                     hostname, sizeof(hostname), 0, 0, niflags);
 706         printf("\tinet6 %s ", hostname);
 707
 708         if (flags & IFF_POINTOPOINT) {
 709                 /* note RTAX_BRD overlap with IFF_BROADCAST */
 710                 sin = (struct sockaddr_in6 *)info.rti_info[RTAX_BRD];
 711                 /*
 712                  * some of ther interfaces do not have valid destination
 713                  * address.
 714                  */
 715                 if (sin->sin6_family == AF_INET6) {
 716 #ifdef __KAME__
 717                         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
 718                                 sin->sin6_scope_id =
 719                                         ntohs(*(u_int16_t *)&sin->sin6_addr.s6_addr[2]);
 720                                 sin->sin6_addr.s6_addr[2] = 0;
 721                                 sin->sin6_addr.s6_addr[3] = 0;
 722                         }
 723 #endif
 724                         getnameinfo((struct sockaddr *)sin, sin->sin6_len,
 725                                     hostname, sizeof(hostname), 0, 0, niflags);
 726                         printf("--> %s ", hostname);
 727                 }
 728         }
 729
 730         sin = (struct sockaddr_in6 *)info.rti_info[RTAX_NETMASK];
 731         if (!sin)
 732                 sin = &null_sin;
 733         printf(" prefixlen %d ", prefix(&sin->sin6_addr,
 734                 sizeof(struct in6_addr)));
 735
 736         putchar('\n');
 737 }
 738 #endif /*INET6*/
 739
 740 /*ARGSUSED*/
 741 void
 742 ether_status(int dummy)
 743 {
 744         char *cp;
 745         int n;
 746
 747         dummy = 0;      /*fool gcc*/
 748
 749         cp = (char *)LLADDR(sdl);
 750         if ((n = sdl->sdl_alen) > 0) {
 751                 if (sdl->sdl_type == IFT_ETHER)
 752                         printf ("\tether ");
 753                 else
 754                         printf ("\tlladdr ");
 755                 while (--n >= 0)
 756                         printf("%02x%c",*cp++ & 0xff, n>0? ':' : ' ');
 757                 putchar('\n');
 758         }
 759 }
 760
 761 void
 762 Perror(char *cmd)
 763 {
 764         switch (errno) {
 765
 766         case ENXIO:
 767                 errx(1, "%s: no such interface", cmd);
 768                 break;
 769
 770         case EPERM:
 771                 errx(1, "%s: permission denied", cmd);
 772                 break;
 773
 774         default:
 775                 err(1, "%s", cmd);
 776         }
 777 }
 778
 779 #define SIN(x) ((struct sockaddr_in *) &(x))
 780 struct sockaddr_in *sintab[] = {
 781 SIN(addreq.ifra_addr), SIN(addreq.ifra_dstaddr)};
 782
 783 void
 784 in_getaddr(char *s, int which)
 785 {
 786         struct sockaddr_in *sin = sintab[which];
 787         struct hostent *hp;
 788         struct netent *np;
 789
 790         sin->sin_len = sizeof(*sin);
 791         sin->sin_family = AF_INET;
 792
 793         if (inet_aton(s, &sin->sin_addr))
 794                 ;
 795         else if ((hp = gethostbyname(s)) != NULL)
 796                 bcopy(hp->h_addr, (char *)&sin->sin_addr, hp->h_length);
 797         else if ((np = getnetbyname(s)) != NULL)
 798                 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
 799         else
 800                 errx(1, "%s: bad value", s);
 801 }
 802
 803 #ifdef INET6
 804 #define SIN6(x) ((struct sockaddr_in6 *) &(x))
 805 struct sockaddr_in6 *sin6tab[] = {
 806 SIN6(in6_addreq.ifra_addr), SIN6(in6_addreq.ifra_dstaddr)};
 807
 808 void
 809 in6_getaddr(char *s, int which)
 810 {
 811         struct sockaddr_in6 *sin = sin6tab[which];
 812
 813         sin->sin6_len = sizeof(*sin);
 814         sin->sin6_family = AF_INET6;
 815
 816         if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1)
 817                 errx(1, "%s: bad value", s);
 818 }
 819
 820 void
 821 in6_getprefix(char *plen, int which)
 822 {
 823         struct sockaddr_in6 *sin = sin6tab[which];
 824         u_char *cp;
 825         int len = atoi(plen);
 826
 827         if ((len < 0) || (len > 128))
 828                 errx(1, "%s: bad value", plen);
 829         sin->sin6_len = sizeof(*sin);
 830         sin->sin6_family = AF_INET6;
 831         if ((len == 0) || (len == 128)) {
 832                 memset(&sin->sin6_addr, -1, sizeof(struct in6_addr));
 833                 return;
 834         }
 835         for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8)
 836                 *cp++ = -1;
 837         *cp = (-1) << (8 - len);
 838 }
 839 #endif
 840
 841 /*
 842  * Print a value a la the %b format of the kernel's printf
 843  */
 844 void
 845 printb(char *s, unsigned int v, char *bits)
 846 {
 847         int i, any = 0;
 848         char c;
 849
 850         if (bits && *bits == 8)
 851                 printf("%s=%o", s, v & 0xffff);
 852         else
 853                 printf("%s=%x", s, v & 0xffff);
 854         bits++;
 855         if (bits) {
 856                 putchar('<');
 857                 while ((i = *bits++) != 0) {
 858                         if ((v & (1 << (i-1))) != 0) {
 859                                 if (any)
 860                                         putchar(',');
 861                                 any = 1;
 862                                 for (; (c = *bits) > 32; bits++)
 863                                         putchar(c);
 864                         } else
 865                                 for (; *bits > 32; bits++)
 866                                         ;
 867                 }
 868                 putchar('>');
 869         }
 870 }
 871
 872 #ifdef INET6
 873 int
 874 prefix(void *val, int size)
 875 {
 876         u_char *name = (u_char *)val;
 877         int byte, bit, plen = 0;
 878
 879         for (byte = 0; byte < size; byte++, plen += 8)
 880                 if (name[byte] != 0xff)
 881                         break;
 882         if (byte == size)
 883                 return (plen);
 884         for (bit = 7; bit != 0; bit--, plen++)
 885                 if (!(name[byte] & (1 << bit)))
 886                         break;
 887         for (; bit != 0; bit--)
 888                 if (name[byte] & (1 << bit))
 889                         return(0);
 890         byte++;
 891         for (; byte < size; byte++)
 892                 if (name[byte])
 893                         return(0);
 894         return (plen);
 895 }
 896 #endif /*INET6*/