| 1 | /* |
| 2 | * Copyright (c) 1990,1991 Regents of The University of Michigan. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * $DragonFly: src/sys/netproto/atalk/at_control.c,v 1.4 2003/07/21 07:57:48 dillon Exp $ |
| 6 | */ |
| 7 | |
| 8 | #include <sys/param.h> |
| 9 | #include <sys/systm.h> |
| 10 | #include <sys/proc.h> |
| 11 | #include <sys/sockio.h> |
| 12 | #include <sys/malloc.h> |
| 13 | #include <sys/kernel.h> |
| 14 | #include <sys/socket.h> |
| 15 | #include <net/if.h> |
| 16 | #include <net/route.h> |
| 17 | #include <netinet/in.h> |
| 18 | #undef s_net |
| 19 | #include <netinet/if_ether.h> |
| 20 | |
| 21 | #include <netatalk/at.h> |
| 22 | #include <netatalk/at_var.h> |
| 23 | #include <netatalk/at_extern.h> |
| 24 | |
| 25 | struct at_ifaddr *at_ifaddr; |
| 26 | |
| 27 | static int aa_dorangeroute(struct ifaddr *ifa, |
| 28 | u_int first, u_int last, int cmd); |
| 29 | static int aa_addsingleroute(struct ifaddr *ifa, |
| 30 | struct at_addr *addr, struct at_addr *mask); |
| 31 | static int aa_delsingleroute(struct ifaddr *ifa, |
| 32 | struct at_addr *addr, struct at_addr *mask); |
| 33 | static int aa_dosingleroute(struct ifaddr *ifa, struct at_addr *addr, |
| 34 | struct at_addr *mask, int cmd, int flags); |
| 35 | static int at_scrub( struct ifnet *ifp, struct at_ifaddr *aa ); |
| 36 | static int at_ifinit( struct ifnet *ifp, struct at_ifaddr *aa, |
| 37 | struct sockaddr_at *sat ); |
| 38 | static int aa_claim_addr(struct ifaddr *ifa, struct sockaddr *gw); |
| 39 | |
| 40 | # define sateqaddr(a,b) ((a)->sat_len == (b)->sat_len && \ |
| 41 | (a)->sat_family == (b)->sat_family && \ |
| 42 | (a)->sat_addr.s_net == (b)->sat_addr.s_net && \ |
| 43 | (a)->sat_addr.s_node == (b)->sat_addr.s_node ) |
| 44 | |
| 45 | int |
| 46 | at_control(struct socket *so, u_long cmd, caddr_t data, |
| 47 | struct ifnet *ifp, struct thread *td ) |
| 48 | { |
| 49 | struct ifreq *ifr = (struct ifreq *)data; |
| 50 | struct sockaddr_at *sat; |
| 51 | struct netrange *nr; |
| 52 | struct at_aliasreq *ifra = (struct at_aliasreq *)data; |
| 53 | struct at_ifaddr *aa0; |
| 54 | struct at_ifaddr *aa = 0; |
| 55 | struct ifaddr *ifa, *ifa0; |
| 56 | |
| 57 | /* |
| 58 | * If we have an ifp, then find the matching at_ifaddr if it exists |
| 59 | */ |
| 60 | if ( ifp ) { |
| 61 | for ( aa = at_ifaddr; aa; aa = aa->aa_next ) { |
| 62 | if ( aa->aa_ifp == ifp ) break; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /* |
| 67 | * In this first switch table we are basically getting ready for |
| 68 | * the second one, by getting the atalk-specific things set up |
| 69 | * so that they start to look more similar to other protocols etc. |
| 70 | */ |
| 71 | |
| 72 | switch ( cmd ) { |
| 73 | case SIOCAIFADDR: |
| 74 | case SIOCDIFADDR: |
| 75 | /* |
| 76 | * If we have an appletalk sockaddr, scan forward of where |
| 77 | * we are now on the at_ifaddr list to find one with a matching |
| 78 | * address on this interface. |
| 79 | * This may leave aa pointing to the first address on the |
| 80 | * NEXT interface! |
| 81 | */ |
| 82 | if ( ifra->ifra_addr.sat_family == AF_APPLETALK ) { |
| 83 | for ( ; aa; aa = aa->aa_next ) { |
| 84 | if ( aa->aa_ifp == ifp && |
| 85 | sateqaddr( &aa->aa_addr, &ifra->ifra_addr )) { |
| 86 | break; |
| 87 | } |
| 88 | } |
| 89 | } |
| 90 | /* |
| 91 | * If we a retrying to delete an addres but didn't find such, |
| 92 | * then rewurn with an error |
| 93 | */ |
| 94 | if ( cmd == SIOCDIFADDR && aa == 0 ) { |
| 95 | return( EADDRNOTAVAIL ); |
| 96 | } |
| 97 | /*FALLTHROUGH*/ |
| 98 | |
| 99 | case SIOCSIFADDR: |
| 100 | /* |
| 101 | * If we are not superuser, then we don't get to do these ops. |
| 102 | */ |
| 103 | if (suser(td)) |
| 104 | return(EPERM); |
| 105 | |
| 106 | sat = satosat( &ifr->ifr_addr ); |
| 107 | nr = (struct netrange *)sat->sat_zero; |
| 108 | if ( nr->nr_phase == 1 ) { |
| 109 | /* |
| 110 | * Look for a phase 1 address on this interface. |
| 111 | * This may leave aa pointing to the first address on the |
| 112 | * NEXT interface! |
| 113 | */ |
| 114 | for ( ; aa; aa = aa->aa_next ) { |
| 115 | if ( aa->aa_ifp == ifp && |
| 116 | ( aa->aa_flags & AFA_PHASE2 ) == 0 ) { |
| 117 | break; |
| 118 | } |
| 119 | } |
| 120 | } else { /* default to phase 2 */ |
| 121 | /* |
| 122 | * Look for a phase 2 address on this interface. |
| 123 | * This may leave aa pointing to the first address on the |
| 124 | * NEXT interface! |
| 125 | */ |
| 126 | for ( ; aa; aa = aa->aa_next ) { |
| 127 | if ( aa->aa_ifp == ifp && ( aa->aa_flags & AFA_PHASE2 )) { |
| 128 | break; |
| 129 | } |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | if ( ifp == 0 ) |
| 134 | panic( "at_control" ); |
| 135 | |
| 136 | /* |
| 137 | * If we failed to find an existing at_ifaddr entry, then we |
| 138 | * allocate a fresh one. |
| 139 | */ |
| 140 | if ( aa == (struct at_ifaddr *) 0 ) { |
| 141 | aa0 = malloc(sizeof(struct at_ifaddr), M_IFADDR, M_WAITOK); |
| 142 | bzero(aa0, sizeof(struct at_ifaddr)); |
| 143 | if (( aa = at_ifaddr ) != NULL ) { |
| 144 | /* |
| 145 | * Don't let the loopback be first, since the first |
| 146 | * address is the machine's default address for |
| 147 | * binding. |
| 148 | * If it is, stick ourself in front, otherwise |
| 149 | * go to the back of the list. |
| 150 | */ |
| 151 | if ( at_ifaddr->aa_ifp->if_flags & IFF_LOOPBACK ) { |
| 152 | aa = aa0; |
| 153 | aa->aa_next = at_ifaddr; |
| 154 | at_ifaddr = aa; |
| 155 | } else { |
| 156 | for ( ; aa->aa_next; aa = aa->aa_next ) |
| 157 | ; |
| 158 | aa->aa_next = aa0; |
| 159 | } |
| 160 | } else { |
| 161 | at_ifaddr = aa0; |
| 162 | } |
| 163 | /* |
| 164 | * Don't Add a reference for the aa itself! |
| 165 | * I fell into this trap. IFAFREE tests for <=0 |
| 166 | * not <= 1 like RTFREE |
| 167 | */ |
| 168 | /* aa->aa_ifa.ifa_refcnt++; DON'T DO THIS!! */ |
| 169 | aa = aa0; |
| 170 | |
| 171 | /* |
| 172 | * Find the end of the interface's addresses |
| 173 | * and link our new one on the end |
| 174 | */ |
| 175 | ifa = (struct ifaddr *)aa; |
| 176 | TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); |
| 177 | |
| 178 | /* |
| 179 | * Add a reference for the linking into the ifp_if_addrlist. |
| 180 | */ |
| 181 | ifa->ifa_refcnt++; |
| 182 | |
| 183 | /* |
| 184 | * As the at_ifaddr contains the actual sockaddrs, |
| 185 | * and the ifaddr itself, link them al together correctly. |
| 186 | */ |
| 187 | ifa->ifa_addr = (struct sockaddr *)&aa->aa_addr; |
| 188 | ifa->ifa_dstaddr = (struct sockaddr *)&aa->aa_addr; |
| 189 | ifa->ifa_netmask = (struct sockaddr *)&aa->aa_netmask; |
| 190 | |
| 191 | /* |
| 192 | * Set/clear the phase 2 bit. |
| 193 | */ |
| 194 | if ( nr->nr_phase == 1 ) { |
| 195 | aa->aa_flags &= ~AFA_PHASE2; |
| 196 | } else { |
| 197 | aa->aa_flags |= AFA_PHASE2; |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * and link it all together |
| 202 | */ |
| 203 | aa->aa_ifp = ifp; |
| 204 | } else { |
| 205 | /* |
| 206 | * If we DID find one then we clobber any routes dependent on it.. |
| 207 | */ |
| 208 | at_scrub( ifp, aa ); |
| 209 | } |
| 210 | break; |
| 211 | |
| 212 | case SIOCGIFADDR : |
| 213 | sat = satosat( &ifr->ifr_addr ); |
| 214 | nr = (struct netrange *)sat->sat_zero; |
| 215 | if ( nr->nr_phase == 1 ) { |
| 216 | /* |
| 217 | * If the request is specifying phase 1, then |
| 218 | * only look at a phase one address |
| 219 | */ |
| 220 | for ( ; aa; aa = aa->aa_next ) { |
| 221 | if ( aa->aa_ifp == ifp && |
| 222 | ( aa->aa_flags & AFA_PHASE2 ) == 0 ) { |
| 223 | break; |
| 224 | } |
| 225 | } |
| 226 | } else { |
| 227 | /* |
| 228 | * default to phase 2 |
| 229 | */ |
| 230 | for ( ; aa; aa = aa->aa_next ) { |
| 231 | if ( aa->aa_ifp == ifp && ( aa->aa_flags & AFA_PHASE2 )) { |
| 232 | break; |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | if ( aa == (struct at_ifaddr *) 0 ) |
| 238 | return( EADDRNOTAVAIL ); |
| 239 | break; |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * By the time this switch is run we should be able to assume that |
| 244 | * the "aa" pointer is valid when needed. |
| 245 | */ |
| 246 | switch ( cmd ) { |
| 247 | case SIOCGIFADDR: |
| 248 | |
| 249 | /* |
| 250 | * copy the contents of the sockaddr blindly. |
| 251 | */ |
| 252 | sat = (struct sockaddr_at *)&ifr->ifr_addr; |
| 253 | *sat = aa->aa_addr; |
| 254 | |
| 255 | /* |
| 256 | * and do some cleanups |
| 257 | */ |
| 258 | ((struct netrange *)&sat->sat_zero)->nr_phase |
| 259 | = (aa->aa_flags & AFA_PHASE2) ? 2 : 1; |
| 260 | ((struct netrange *)&sat->sat_zero)->nr_firstnet = aa->aa_firstnet; |
| 261 | ((struct netrange *)&sat->sat_zero)->nr_lastnet = aa->aa_lastnet; |
| 262 | break; |
| 263 | |
| 264 | case SIOCSIFADDR: |
| 265 | return( at_ifinit( ifp, aa, (struct sockaddr_at *)&ifr->ifr_addr )); |
| 266 | |
| 267 | case SIOCAIFADDR: |
| 268 | if ( sateqaddr( &ifra->ifra_addr, &aa->aa_addr )) { |
| 269 | return( 0 ); |
| 270 | } |
| 271 | return( at_ifinit( ifp, aa, (struct sockaddr_at *)&ifr->ifr_addr )); |
| 272 | |
| 273 | case SIOCDIFADDR: |
| 274 | /* |
| 275 | * scrub all routes.. didn't we just DO this? XXX yes, del it |
| 276 | */ |
| 277 | at_scrub( ifp, aa ); |
| 278 | |
| 279 | /* |
| 280 | * remove the ifaddr from the interface |
| 281 | */ |
| 282 | ifa0 = (struct ifaddr *)aa; |
| 283 | TAILQ_REMOVE(&ifp->if_addrhead, ifa0, ifa_link); |
| 284 | |
| 285 | /* |
| 286 | * refs goes from 1->0 if no external refs. note.. |
| 287 | * This will not free it ... looks for -1. |
| 288 | */ |
| 289 | IFAFREE(ifa0); |
| 290 | |
| 291 | /* |
| 292 | * Now remove the at_ifaddr from the parallel structure |
| 293 | * as well, or we'd be in deep trouble |
| 294 | */ |
| 295 | aa0 = aa; |
| 296 | if ( aa0 == ( aa = at_ifaddr )) { |
| 297 | at_ifaddr = aa->aa_next; |
| 298 | } else { |
| 299 | while ( aa->aa_next && ( aa->aa_next != aa0 )) { |
| 300 | aa = aa->aa_next; |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * if we found it, remove it, otherwise we screwed up. |
| 305 | */ |
| 306 | if ( aa->aa_next ) { |
| 307 | aa->aa_next = aa0->aa_next; |
| 308 | } else { |
| 309 | panic( "at_control" ); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | /* |
| 314 | * Now dump the memory we were using. |
| 315 | * Decrement the reference count. |
| 316 | * This should probably be the last reference |
| 317 | * as the count will go from 0 to -1. |
| 318 | * (unless there is still a route referencing this) |
| 319 | */ |
| 320 | IFAFREE(ifa0); |
| 321 | break; |
| 322 | |
| 323 | default: |
| 324 | if ( ifp == 0 || ifp->if_ioctl == 0 ) |
| 325 | return( EOPNOTSUPP ); |
| 326 | return( (*ifp->if_ioctl)( ifp, cmd, data )); |
| 327 | } |
| 328 | return( 0 ); |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * Given an interface and an at_ifaddr (supposedly on that interface) |
| 333 | * remove any routes that depend on this. |
| 334 | * Why ifp is needed I'm not sure, |
| 335 | * as aa->at_ifaddr.ifa_ifp should be the same. |
| 336 | */ |
| 337 | static int |
| 338 | at_scrub( ifp, aa ) |
| 339 | struct ifnet *ifp; |
| 340 | struct at_ifaddr *aa; |
| 341 | { |
| 342 | int error; |
| 343 | |
| 344 | if ( aa->aa_flags & AFA_ROUTE ) { |
| 345 | if (ifp->if_flags & IFF_LOOPBACK) { |
| 346 | if ((error = aa_delsingleroute(&aa->aa_ifa, |
| 347 | &aa->aa_addr.sat_addr, |
| 348 | &aa->aa_netmask.sat_addr)) != 0) { |
| 349 | return( error ); |
| 350 | } |
| 351 | } else if (ifp->if_flags & IFF_POINTOPOINT) { |
| 352 | if ((error = rtinit( &aa->aa_ifa, RTM_DELETE, RTF_HOST)) != 0) |
| 353 | return( error ); |
| 354 | } else if (ifp->if_flags & IFF_BROADCAST) { |
| 355 | error = aa_dorangeroute(&aa->aa_ifa, |
| 356 | ntohs(aa->aa_firstnet), |
| 357 | ntohs(aa->aa_lastnet), |
| 358 | RTM_DELETE ); |
| 359 | } |
| 360 | aa->aa_ifa.ifa_flags &= ~IFA_ROUTE; |
| 361 | aa->aa_flags &= ~AFA_ROUTE; |
| 362 | } |
| 363 | return( 0 ); |
| 364 | } |
| 365 | |
| 366 | /* |
| 367 | * given an at_ifaddr,a sockaddr_at and an ifp, |
| 368 | * bang them all together at high speed and see what happens |
| 369 | */ |
| 370 | static int |
| 371 | at_ifinit( ifp, aa, sat ) |
| 372 | struct ifnet *ifp; |
| 373 | struct at_ifaddr *aa; |
| 374 | struct sockaddr_at *sat; |
| 375 | { |
| 376 | struct netrange nr, onr; |
| 377 | struct sockaddr_at oldaddr; |
| 378 | int s = splimp(), error = 0, i, j; |
| 379 | int netinc, nodeinc, nnets; |
| 380 | u_short net; |
| 381 | |
| 382 | /* |
| 383 | * save the old addresses in the at_ifaddr just in case we need them. |
| 384 | */ |
| 385 | oldaddr = aa->aa_addr; |
| 386 | onr.nr_firstnet = aa->aa_firstnet; |
| 387 | onr.nr_lastnet = aa->aa_lastnet; |
| 388 | |
| 389 | /* |
| 390 | * take the address supplied as an argument, and add it to the |
| 391 | * at_ifnet (also given). Remember ing to update |
| 392 | * those parts of the at_ifaddr that need special processing |
| 393 | */ |
| 394 | bzero( AA_SAT( aa ), sizeof( struct sockaddr_at )); |
| 395 | bcopy( sat->sat_zero, &nr, sizeof( struct netrange )); |
| 396 | bcopy( sat->sat_zero, AA_SAT( aa )->sat_zero, sizeof( struct netrange )); |
| 397 | nnets = ntohs( nr.nr_lastnet ) - ntohs( nr.nr_firstnet ) + 1; |
| 398 | aa->aa_firstnet = nr.nr_firstnet; |
| 399 | aa->aa_lastnet = nr.nr_lastnet; |
| 400 | |
| 401 | /* XXX ALC */ |
| 402 | #if 0 |
| 403 | printf("at_ifinit: %s: %u.%u range %u-%u phase %d\n", |
| 404 | ifp->if_name, |
| 405 | ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node, |
| 406 | ntohs(aa->aa_firstnet), ntohs(aa->aa_lastnet), |
| 407 | (aa->aa_flags & AFA_PHASE2) ? 2 : 1); |
| 408 | #endif |
| 409 | |
| 410 | /* |
| 411 | * We could eliminate the need for a second phase 1 probe (post |
| 412 | * autoconf) if we check whether we're resetting the node. Note |
| 413 | * that phase 1 probes use only nodes, not net.node pairs. Under |
| 414 | * phase 2, both the net and node must be the same. |
| 415 | */ |
| 416 | if ( ifp->if_flags & IFF_LOOPBACK ) { |
| 417 | AA_SAT( aa )->sat_len = sat->sat_len; |
| 418 | AA_SAT( aa )->sat_family = AF_APPLETALK; |
| 419 | AA_SAT( aa )->sat_addr.s_net = sat->sat_addr.s_net; |
| 420 | AA_SAT( aa )->sat_addr.s_node = sat->sat_addr.s_node; |
| 421 | #if 0 |
| 422 | } else if ( fp->if_flags & IFF_POINTOPOINT) { |
| 423 | /* unimplemented */ |
| 424 | /* |
| 425 | * we'd have to copy the dstaddr field over from the sat |
| 426 | * but it's not clear that it would contain the right info.. |
| 427 | */ |
| 428 | #endif |
| 429 | } else { |
| 430 | /* |
| 431 | * We are a normal (probably ethernet) interface. |
| 432 | * apply the new address to the interface structures etc. |
| 433 | * We will probe this address on the net first, before |
| 434 | * applying it to ensure that it is free.. If it is not, then |
| 435 | * we will try a number of other randomly generated addresses |
| 436 | * in this net and then increment the net. etc.etc. until |
| 437 | * we find an unused address. |
| 438 | */ |
| 439 | aa->aa_flags |= AFA_PROBING; /* if not loopback we Must probe? */ |
| 440 | AA_SAT( aa )->sat_len = sizeof(struct sockaddr_at); |
| 441 | AA_SAT( aa )->sat_family = AF_APPLETALK; |
| 442 | if ( aa->aa_flags & AFA_PHASE2 ) { |
| 443 | if ( sat->sat_addr.s_net == ATADDR_ANYNET ) { |
| 444 | /* |
| 445 | * If we are phase 2, and the net was not specified |
| 446 | * then we select a random net within the supplied netrange. |
| 447 | * XXX use /dev/random? |
| 448 | */ |
| 449 | if ( nnets != 1 ) { |
| 450 | net = ntohs( nr.nr_firstnet ) + time_second % ( nnets - 1 ); |
| 451 | } else { |
| 452 | net = ntohs( nr.nr_firstnet ); |
| 453 | } |
| 454 | } else { |
| 455 | /* |
| 456 | * if a net was supplied, then check that it is within |
| 457 | * the netrange. If it is not then replace the old values |
| 458 | * and return an error |
| 459 | */ |
| 460 | if ( ntohs( sat->sat_addr.s_net ) < ntohs( nr.nr_firstnet ) || |
| 461 | ntohs( sat->sat_addr.s_net ) > ntohs( nr.nr_lastnet )) { |
| 462 | aa->aa_addr = oldaddr; |
| 463 | aa->aa_firstnet = onr.nr_firstnet; |
| 464 | aa->aa_lastnet = onr.nr_lastnet; |
| 465 | splx(s); |
| 466 | return( EINVAL ); |
| 467 | } |
| 468 | /* |
| 469 | * otherwise just use the new net number.. |
| 470 | */ |
| 471 | net = ntohs( sat->sat_addr.s_net ); |
| 472 | } |
| 473 | } else { |
| 474 | /* |
| 475 | * we must be phase one, so just use whatever we were given. |
| 476 | * I guess it really isn't going to be used... RIGHT? |
| 477 | */ |
| 478 | net = ntohs( sat->sat_addr.s_net ); |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | * set the node part of the address into the ifaddr. |
| 483 | * If it's not specified, be random about it... |
| 484 | * XXX use /dev/random? |
| 485 | */ |
| 486 | if ( sat->sat_addr.s_node == ATADDR_ANYNODE ) { |
| 487 | AA_SAT( aa )->sat_addr.s_node = time_second; |
| 488 | } else { |
| 489 | AA_SAT( aa )->sat_addr.s_node = sat->sat_addr.s_node; |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * Copy the phase. |
| 494 | */ |
| 495 | AA_SAT( aa )->sat_range.r_netrange.nr_phase |
| 496 | = ((aa->aa_flags & AFA_PHASE2) ? 2:1); |
| 497 | |
| 498 | /* |
| 499 | * step through the nets in the range |
| 500 | * starting at the (possibly random) start point. |
| 501 | */ |
| 502 | for ( i = nnets, netinc = 1; i > 0; net = ntohs( nr.nr_firstnet ) + |
| 503 | (( net - ntohs( nr.nr_firstnet ) + netinc ) % nnets ), i-- ) { |
| 504 | AA_SAT( aa )->sat_addr.s_net = htons( net ); |
| 505 | |
| 506 | /* |
| 507 | * using a rather strange stepping method, |
| 508 | * stagger through the possible node addresses |
| 509 | * Once again, starting at the (possibly random) |
| 510 | * initial node address. |
| 511 | */ |
| 512 | for ( j = 0, nodeinc = time_second | 1; j < 256; |
| 513 | j++, AA_SAT( aa )->sat_addr.s_node += nodeinc ) { |
| 514 | if ( AA_SAT( aa )->sat_addr.s_node > 253 || |
| 515 | AA_SAT( aa )->sat_addr.s_node < 1 ) { |
| 516 | continue; |
| 517 | } |
| 518 | aa->aa_probcnt = 10; |
| 519 | |
| 520 | /* |
| 521 | * start off the probes as an asynchronous activity. |
| 522 | * though why wait 200mSec? |
| 523 | */ |
| 524 | aa->aa_ch = timeout( aarpprobe, (caddr_t)ifp, hz / 5 ); |
| 525 | if ( tsleep( aa, PCATCH, "at_ifinit", 0 )) { |
| 526 | /* |
| 527 | * theoretically we shouldn't time out here |
| 528 | * so if we returned with an error.. |
| 529 | */ |
| 530 | printf( "at_ifinit: why did this happen?!\n" ); |
| 531 | aa->aa_addr = oldaddr; |
| 532 | aa->aa_firstnet = onr.nr_firstnet; |
| 533 | aa->aa_lastnet = onr.nr_lastnet; |
| 534 | splx( s ); |
| 535 | return( EINTR ); |
| 536 | } |
| 537 | |
| 538 | /* |
| 539 | * The async activity should have woken us up. |
| 540 | * We need to see if it was successful in finding |
| 541 | * a free spot, or if we need to iterate to the next |
| 542 | * address to try. |
| 543 | */ |
| 544 | if (( aa->aa_flags & AFA_PROBING ) == 0 ) { |
| 545 | break; |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | * of course we need to break out through two loops... |
| 551 | */ |
| 552 | if (( aa->aa_flags & AFA_PROBING ) == 0 ) { |
| 553 | break; |
| 554 | } |
| 555 | /* reset node for next network */ |
| 556 | AA_SAT( aa )->sat_addr.s_node = time_second; |
| 557 | } |
| 558 | |
| 559 | /* |
| 560 | * if we are still trying to probe, then we have finished all |
| 561 | * the possible addresses, so we need to give up |
| 562 | */ |
| 563 | |
| 564 | if ( aa->aa_flags & AFA_PROBING ) { |
| 565 | aa->aa_addr = oldaddr; |
| 566 | aa->aa_firstnet = onr.nr_firstnet; |
| 567 | aa->aa_lastnet = onr.nr_lastnet; |
| 568 | splx( s ); |
| 569 | return( EADDRINUSE ); |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | /* |
| 574 | * Now that we have selected an address, we need to tell the interface |
| 575 | * about it, just in case it needs to adjust something. |
| 576 | */ |
| 577 | if ( ifp->if_ioctl && |
| 578 | ( error = (*ifp->if_ioctl)( ifp, SIOCSIFADDR, (caddr_t)aa ))) { |
| 579 | /* |
| 580 | * of course this could mean that it objects violently |
| 581 | * so if it does, we back out again.. |
| 582 | */ |
| 583 | aa->aa_addr = oldaddr; |
| 584 | aa->aa_firstnet = onr.nr_firstnet; |
| 585 | aa->aa_lastnet = onr.nr_lastnet; |
| 586 | splx( s ); |
| 587 | return( error ); |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * set up the netmask part of the at_ifaddr |
| 592 | * and point the appropriate pointer in the ifaddr to it. |
| 593 | * probably pointless, but what the heck.. XXX |
| 594 | */ |
| 595 | bzero(&aa->aa_netmask, sizeof(aa->aa_netmask)); |
| 596 | aa->aa_netmask.sat_len = sizeof(struct sockaddr_at); |
| 597 | aa->aa_netmask.sat_family = AF_APPLETALK; |
| 598 | aa->aa_netmask.sat_addr.s_net = 0xffff; |
| 599 | aa->aa_netmask.sat_addr.s_node = 0; |
| 600 | aa->aa_ifa.ifa_netmask =(struct sockaddr *) &(aa->aa_netmask); /* XXX */ |
| 601 | |
| 602 | /* |
| 603 | * Initialize broadcast (or remote p2p) address |
| 604 | */ |
| 605 | bzero(&aa->aa_broadaddr, sizeof(aa->aa_broadaddr)); |
| 606 | aa->aa_broadaddr.sat_len = sizeof(struct sockaddr_at); |
| 607 | aa->aa_broadaddr.sat_family = AF_APPLETALK; |
| 608 | |
| 609 | aa->aa_ifa.ifa_metric = ifp->if_metric; |
| 610 | if (ifp->if_flags & IFF_BROADCAST) { |
| 611 | aa->aa_broadaddr.sat_addr.s_net = htons(0); |
| 612 | aa->aa_broadaddr.sat_addr.s_node = 0xff; |
| 613 | aa->aa_ifa.ifa_broadaddr = (struct sockaddr *) &aa->aa_broadaddr; |
| 614 | /* add the range of routes needed */ |
| 615 | error = aa_dorangeroute(&aa->aa_ifa, |
| 616 | ntohs(aa->aa_firstnet), ntohs(aa->aa_lastnet), RTM_ADD ); |
| 617 | } |
| 618 | else if (ifp->if_flags & IFF_POINTOPOINT) { |
| 619 | struct at_addr rtaddr, rtmask; |
| 620 | |
| 621 | bzero(&rtaddr, sizeof(rtaddr)); |
| 622 | bzero(&rtmask, sizeof(rtmask)); |
| 623 | /* fill in the far end if we know it here XXX */ |
| 624 | aa->aa_ifa.ifa_dstaddr = (struct sockaddr *) &aa->aa_dstaddr; |
| 625 | error = aa_addsingleroute(&aa->aa_ifa, &rtaddr, &rtmask); |
| 626 | } |
| 627 | else if ( ifp->if_flags & IFF_LOOPBACK ) { |
| 628 | struct at_addr rtaddr, rtmask; |
| 629 | |
| 630 | bzero(&rtaddr, sizeof(rtaddr)); |
| 631 | bzero(&rtmask, sizeof(rtmask)); |
| 632 | rtaddr.s_net = AA_SAT( aa )->sat_addr.s_net; |
| 633 | rtaddr.s_node = AA_SAT( aa )->sat_addr.s_node; |
| 634 | rtmask.s_net = 0xffff; |
| 635 | rtmask.s_node = 0x0; /* XXX should not be so.. should be HOST route */ |
| 636 | error = aa_addsingleroute(&aa->aa_ifa, &rtaddr, &rtmask); |
| 637 | } |
| 638 | |
| 639 | |
| 640 | /* |
| 641 | * set the address of our "check if this addr is ours" routine. |
| 642 | */ |
| 643 | aa->aa_ifa.ifa_claim_addr = aa_claim_addr; |
| 644 | |
| 645 | /* |
| 646 | * of course if we can't add these routes we back out, but it's getting |
| 647 | * risky by now XXX |
| 648 | */ |
| 649 | if ( error ) { |
| 650 | at_scrub( ifp, aa ); |
| 651 | aa->aa_addr = oldaddr; |
| 652 | aa->aa_firstnet = onr.nr_firstnet; |
| 653 | aa->aa_lastnet = onr.nr_lastnet; |
| 654 | splx( s ); |
| 655 | return( error ); |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * note that the address has a route associated with it.... |
| 660 | */ |
| 661 | aa->aa_ifa.ifa_flags |= IFA_ROUTE; |
| 662 | aa->aa_flags |= AFA_ROUTE; |
| 663 | splx( s ); |
| 664 | return( 0 ); |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * check whether a given address is a broadcast address for us.. |
| 669 | */ |
| 670 | int |
| 671 | at_broadcast( sat ) |
| 672 | struct sockaddr_at *sat; |
| 673 | { |
| 674 | struct at_ifaddr *aa; |
| 675 | |
| 676 | /* |
| 677 | * If the node is not right, it can't be a broadcast |
| 678 | */ |
| 679 | if ( sat->sat_addr.s_node != ATADDR_BCAST ) { |
| 680 | return( 0 ); |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * If the node was right then if the net is right, it's a broadcast |
| 685 | */ |
| 686 | if ( sat->sat_addr.s_net == ATADDR_ANYNET ) { |
| 687 | return( 1 ); |
| 688 | } |
| 689 | |
| 690 | /* |
| 691 | * failing that, if the net is one we have, it's a broadcast as well. |
| 692 | */ |
| 693 | for ( aa = at_ifaddr; aa; aa = aa->aa_next ) { |
| 694 | if (( aa->aa_ifp->if_flags & IFF_BROADCAST ) |
| 695 | && ( ntohs( sat->sat_addr.s_net ) >= ntohs( aa->aa_firstnet ) |
| 696 | && ntohs( sat->sat_addr.s_net ) <= ntohs( aa->aa_lastnet ))) { |
| 697 | return( 1 ); |
| 698 | } |
| 699 | } |
| 700 | return( 0 ); |
| 701 | } |
| 702 | |
| 703 | /* |
| 704 | * aa_dorangeroute() |
| 705 | * |
| 706 | * Add a route for a range of networks from bot to top - 1. |
| 707 | * Algorithm: |
| 708 | * |
| 709 | * Split the range into two subranges such that the middle |
| 710 | * of the two ranges is the point where the highest bit of difference |
| 711 | * between the two addresses makes its transition. |
| 712 | * Each of the upper and lower ranges might not exist, or might be |
| 713 | * representable by 1 or more netmasks. In addition, if both |
| 714 | * ranges can be represented by the same netmask, then they can be merged |
| 715 | * by using the next higher netmask.. |
| 716 | */ |
| 717 | |
| 718 | static int |
| 719 | aa_dorangeroute(struct ifaddr *ifa, u_int bot, u_int top, int cmd) |
| 720 | { |
| 721 | u_int mask1; |
| 722 | struct at_addr addr; |
| 723 | struct at_addr mask; |
| 724 | int error; |
| 725 | |
| 726 | /* |
| 727 | * slight sanity check |
| 728 | */ |
| 729 | if (bot > top) return (EINVAL); |
| 730 | |
| 731 | addr.s_node = 0; |
| 732 | mask.s_node = 0; |
| 733 | /* |
| 734 | * just start out with the lowest boundary |
| 735 | * and keep extending the mask till it's too big. |
| 736 | */ |
| 737 | |
| 738 | while (bot <= top) { |
| 739 | mask1 = 1; |
| 740 | while ((( bot & ~mask1) >= bot) |
| 741 | && (( bot | mask1) <= top)) { |
| 742 | mask1 <<= 1; |
| 743 | mask1 |= 1; |
| 744 | } |
| 745 | mask1 >>= 1; |
| 746 | mask.s_net = htons(~mask1); |
| 747 | addr.s_net = htons(bot); |
| 748 | if(cmd == RTM_ADD) { |
| 749 | error = aa_addsingleroute(ifa,&addr,&mask); |
| 750 | if (error) { |
| 751 | /* XXX clean up? */ |
| 752 | return (error); |
| 753 | } |
| 754 | } else { |
| 755 | error = aa_delsingleroute(ifa,&addr,&mask); |
| 756 | } |
| 757 | bot = (bot | mask1) + 1; |
| 758 | } |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | static int |
| 763 | aa_addsingleroute(struct ifaddr *ifa, |
| 764 | struct at_addr *addr, struct at_addr *mask) |
| 765 | { |
| 766 | int error; |
| 767 | |
| 768 | #if 0 |
| 769 | printf("aa_addsingleroute: %x.%x mask %x.%x ...\n", |
| 770 | ntohs(addr->s_net), addr->s_node, |
| 771 | ntohs(mask->s_net), mask->s_node); |
| 772 | #endif |
| 773 | |
| 774 | error = aa_dosingleroute(ifa, addr, mask, RTM_ADD, RTF_UP); |
| 775 | if (error) |
| 776 | printf("aa_addsingleroute: error %d\n", error); |
| 777 | return(error); |
| 778 | } |
| 779 | |
| 780 | static int |
| 781 | aa_delsingleroute(struct ifaddr *ifa, |
| 782 | struct at_addr *addr, struct at_addr *mask) |
| 783 | { |
| 784 | int error; |
| 785 | |
| 786 | error = aa_dosingleroute(ifa, addr, mask, RTM_DELETE, 0); |
| 787 | if (error) |
| 788 | printf("aa_delsingleroute: error %d\n", error); |
| 789 | return(error); |
| 790 | } |
| 791 | |
| 792 | static int |
| 793 | aa_dosingleroute(struct ifaddr *ifa, |
| 794 | struct at_addr *at_addr, struct at_addr *at_mask, int cmd, int flags) |
| 795 | { |
| 796 | struct sockaddr_at addr, mask; |
| 797 | |
| 798 | bzero(&addr, sizeof(addr)); |
| 799 | bzero(&mask, sizeof(mask)); |
| 800 | addr.sat_family = AF_APPLETALK; |
| 801 | addr.sat_len = sizeof(struct sockaddr_at); |
| 802 | addr.sat_addr.s_net = at_addr->s_net; |
| 803 | addr.sat_addr.s_node = at_addr->s_node; |
| 804 | mask.sat_family = AF_APPLETALK; |
| 805 | mask.sat_len = sizeof(struct sockaddr_at); |
| 806 | mask.sat_addr.s_net = at_mask->s_net; |
| 807 | mask.sat_addr.s_node = at_mask->s_node; |
| 808 | if (at_mask->s_node) |
| 809 | flags |= RTF_HOST; |
| 810 | return(rtrequest(cmd, (struct sockaddr *) &addr, |
| 811 | (flags & RTF_HOST)?(ifa->ifa_dstaddr):(ifa->ifa_addr), |
| 812 | (struct sockaddr *) &mask, flags, NULL)); |
| 813 | } |
| 814 | |
| 815 | #if 0 |
| 816 | |
| 817 | static void |
| 818 | aa_clean(void) |
| 819 | { |
| 820 | struct at_ifaddr *aa; |
| 821 | struct ifaddr *ifa; |
| 822 | struct ifnet *ifp; |
| 823 | |
| 824 | while ( aa = at_ifaddr ) { |
| 825 | ifp = aa->aa_ifp; |
| 826 | at_scrub( ifp, aa ); |
| 827 | at_ifaddr = aa->aa_next; |
| 828 | if (( ifa = ifp->if_addrlist ) == (struct ifaddr *)aa ) { |
| 829 | ifp->if_addrlist = ifa->ifa_next; |
| 830 | } else { |
| 831 | while ( ifa->ifa_next && |
| 832 | ( ifa->ifa_next != (struct ifaddr *)aa )) { |
| 833 | ifa = ifa->ifa_next; |
| 834 | } |
| 835 | if ( ifa->ifa_next ) { |
| 836 | ifa->ifa_next = ((struct ifaddr *)aa)->ifa_next; |
| 837 | } else { |
| 838 | panic( "at_entry" ); |
| 839 | } |
| 840 | } |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | #endif |
| 845 | |
| 846 | static int |
| 847 | aa_claim_addr(struct ifaddr *ifa, struct sockaddr *gw0) |
| 848 | { |
| 849 | struct sockaddr_at *addr = (struct sockaddr_at *)ifa->ifa_addr; |
| 850 | struct sockaddr_at *gw = (struct sockaddr_at *)gw0; |
| 851 | |
| 852 | switch (gw->sat_range.r_netrange.nr_phase) { |
| 853 | case 1: |
| 854 | if(addr->sat_range.r_netrange.nr_phase == 1) |
| 855 | return 1; |
| 856 | case 0: |
| 857 | case 2: |
| 858 | /* |
| 859 | * if it's our net (including 0), |
| 860 | * or netranges are valid, and we are in the range, |
| 861 | * then it's ours. |
| 862 | */ |
| 863 | if ((addr->sat_addr.s_net == gw->sat_addr.s_net) |
| 864 | || ((addr->sat_range.r_netrange.nr_lastnet) |
| 865 | && (ntohs(gw->sat_addr.s_net) |
| 866 | >= ntohs(addr->sat_range.r_netrange.nr_firstnet )) |
| 867 | && (ntohs(gw->sat_addr.s_net) |
| 868 | <= ntohs(addr->sat_range.r_netrange.nr_lastnet )))) { |
| 869 | return 1; |
| 870 | } |
| 871 | break; |
| 872 | default: |
| 873 | printf("atalk: bad phase\n"); |
| 874 | } |
| 875 | return 0; |
| 876 | } |