| 1 | /* |
| 2 | * Copyright (c) 1995 Gordon Ross, Adam Glass |
| 3 | * Copyright (c) 1992 Regents of the University of California. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * This software was developed by the Computer Systems Engineering group |
| 7 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and |
| 8 | * contributed to Berkeley. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed by the University of |
| 21 | * California, Lawrence Berkeley Laboratory and its contributors. |
| 22 | * 4. Neither the name of the University nor the names of its contributors |
| 23 | * may be used to endorse or promote products derived from this software |
| 24 | * without specific prior written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 36 | * SUCH DAMAGE. |
| 37 | * |
| 38 | * nfs/krpc_subr.c |
| 39 | * $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $ |
| 40 | * $FreeBSD: src/sys/nfs/bootp_subr.c,v 1.20.2.9 2003/04/24 16:51:08 ambrisko Exp $ |
| 41 | * $DragonFly: src/sys/vfs/nfs/bootp_subr.c,v 1.26 2008/03/08 07:50:49 sephe Exp $ |
| 42 | */ |
| 43 | |
| 44 | #include "opt_bootp.h" |
| 45 | |
| 46 | #include <sys/param.h> |
| 47 | #include <sys/systm.h> |
| 48 | #include <sys/kernel.h> |
| 49 | #include <sys/sockio.h> |
| 50 | #include <sys/proc.h> |
| 51 | #include <sys/malloc.h> |
| 52 | #include <sys/mount.h> |
| 53 | #include <sys/mbuf.h> |
| 54 | #include <sys/socket.h> |
| 55 | #include <sys/socketvar.h> |
| 56 | #include <sys/sysctl.h> |
| 57 | #include <sys/uio.h> |
| 58 | #include <sys/fcntl.h> |
| 59 | |
| 60 | #include <net/if.h> |
| 61 | #include <net/route.h> |
| 62 | |
| 63 | #include <netinet/in.h> |
| 64 | #include <net/if_types.h> |
| 65 | #include <net/if_dl.h> |
| 66 | |
| 67 | #include "rpcv2.h" |
| 68 | #include "nfsproto.h" |
| 69 | #include "nfs.h" |
| 70 | #include "nfsdiskless.h" |
| 71 | #include "krpc.h" |
| 72 | #include "xdr_subs.h" |
| 73 | #include "nfsmountrpc.h" |
| 74 | |
| 75 | #define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */ |
| 76 | |
| 77 | #ifndef BOOTP_SETTLE_DELAY |
| 78 | #define BOOTP_SETTLE_DELAY 3 |
| 79 | #endif |
| 80 | |
| 81 | /* |
| 82 | * What is the longest we will wait before re-sending a request? |
| 83 | * Note this is also the frequency of "RPC timeout" messages. |
| 84 | * The re-send loop count sup linearly to this maximum, so the |
| 85 | * first complaint will happen after (1+2+3+4+5)=15 seconds. |
| 86 | */ |
| 87 | #define MAX_RESEND_DELAY 5 /* seconds */ |
| 88 | |
| 89 | /* Definitions from RFC951 */ |
| 90 | struct bootp_packet { |
| 91 | u_int8_t op; |
| 92 | u_int8_t htype; |
| 93 | u_int8_t hlen; |
| 94 | u_int8_t hops; |
| 95 | u_int32_t xid; |
| 96 | u_int16_t secs; |
| 97 | u_int16_t flags; |
| 98 | struct in_addr ciaddr; |
| 99 | struct in_addr yiaddr; |
| 100 | struct in_addr siaddr; |
| 101 | struct in_addr giaddr; |
| 102 | unsigned char chaddr[16]; |
| 103 | char sname[64]; |
| 104 | char file[128]; |
| 105 | unsigned char vend[1222]; |
| 106 | }; |
| 107 | |
| 108 | struct bootpc_ifcontext { |
| 109 | struct bootpc_ifcontext *next; |
| 110 | struct bootp_packet call; |
| 111 | struct bootp_packet reply; |
| 112 | int replylen; |
| 113 | int overload; |
| 114 | struct socket *so; |
| 115 | struct ifreq ireq; |
| 116 | struct ifnet *ifp; |
| 117 | struct sockaddr_dl *sdl; |
| 118 | struct sockaddr_in myaddr; |
| 119 | struct sockaddr_in netmask; |
| 120 | struct sockaddr_in gw; |
| 121 | struct sockaddr_in broadcast; /* Different for each interface */ |
| 122 | int gotgw; |
| 123 | int gotnetmask; |
| 124 | int gotrootpath; |
| 125 | int outstanding; |
| 126 | int sentmsg; |
| 127 | u_int32_t xid; |
| 128 | enum { |
| 129 | IF_BOOTP_UNRESOLVED, |
| 130 | IF_BOOTP_RESOLVED, |
| 131 | IF_BOOTP_FAILED, |
| 132 | IF_DHCP_UNRESOLVED, |
| 133 | IF_DHCP_OFFERED, |
| 134 | IF_DHCP_RESOLVED, |
| 135 | IF_DHCP_FAILED, |
| 136 | } state; |
| 137 | int dhcpquerytype; /* dhcp type sent */ |
| 138 | struct in_addr dhcpserver; |
| 139 | int gotdhcpserver; |
| 140 | }; |
| 141 | |
| 142 | #define TAG_MAXLEN 1024 |
| 143 | struct bootpc_tagcontext { |
| 144 | char buf[TAG_MAXLEN + 1]; |
| 145 | int overload; |
| 146 | int badopt; |
| 147 | int badtag; |
| 148 | int foundopt; |
| 149 | int taglen; |
| 150 | }; |
| 151 | |
| 152 | struct bootpc_globalcontext { |
| 153 | struct bootpc_ifcontext *interfaces; |
| 154 | struct bootpc_ifcontext *lastinterface; |
| 155 | u_int32_t xid; |
| 156 | int gotrootpath; |
| 157 | int gotswappath; |
| 158 | int gotgw; |
| 159 | int ifnum; |
| 160 | int secs; |
| 161 | int starttime; |
| 162 | struct bootp_packet reply; |
| 163 | int replylen; |
| 164 | struct bootpc_ifcontext *setswapfs; |
| 165 | struct bootpc_ifcontext *setrootfs; |
| 166 | struct bootpc_ifcontext *sethostname; |
| 167 | char lookup_path[24]; |
| 168 | struct bootpc_tagcontext tmptag; |
| 169 | struct bootpc_tagcontext tag; |
| 170 | }; |
| 171 | |
| 172 | #define IPPORT_BOOTPC 68 |
| 173 | #define IPPORT_BOOTPS 67 |
| 174 | |
| 175 | #define BOOTP_REQUEST 1 |
| 176 | #define BOOTP_REPLY 2 |
| 177 | |
| 178 | /* Common tags */ |
| 179 | #define TAG_PAD 0 /* Pad option, implicit length 1 */ |
| 180 | #define TAG_SUBNETMASK 1 /* RFC 950 subnet mask */ |
| 181 | #define TAG_ROUTERS 3 /* Routers (in order of preference) */ |
| 182 | #define TAG_HOSTNAME 12 /* Client host name */ |
| 183 | #define TAG_ROOT 17 /* Root path */ |
| 184 | |
| 185 | /* DHCP specific tags */ |
| 186 | #define TAG_OVERLOAD 52 /* Option Overload */ |
| 187 | #define TAG_MAXMSGSIZE 57 /* Maximum DHCP Message Size */ |
| 188 | |
| 189 | #define TAG_END 255 /* End Option (i.e. no more options) */ |
| 190 | |
| 191 | /* Overload values */ |
| 192 | #define OVERLOAD_FILE 1 |
| 193 | #define OVERLOAD_SNAME 2 |
| 194 | |
| 195 | /* Site specific tags: */ |
| 196 | #define TAG_SWAP 128 |
| 197 | #define TAG_SWAPSIZE 129 |
| 198 | #define TAG_ROOTOPTS 130 |
| 199 | #define TAG_SWAPOPTS 131 |
| 200 | #define TAG_COOKIE 134 /* ascii info for userland, exported via sysctl */ |
| 201 | |
| 202 | #define TAG_DHCP_MSGTYPE 53 |
| 203 | #define TAG_DHCP_REQ_ADDR 50 |
| 204 | #define TAG_DHCP_SERVERID 54 |
| 205 | #define TAG_DHCP_LEASETIME 51 |
| 206 | |
| 207 | #define TAG_VENDOR_INDENTIFIER 60 |
| 208 | |
| 209 | #define DHCP_NOMSG 0 |
| 210 | #define DHCP_DISCOVER 1 |
| 211 | #define DHCP_OFFER 2 |
| 212 | #define DHCP_REQUEST 3 |
| 213 | #define DHCP_ACK 5 |
| 214 | |
| 215 | static char bootp_cookie[128]; |
| 216 | SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD, |
| 217 | bootp_cookie, 0, "Cookie (T134) supplied by bootp server"); |
| 218 | |
| 219 | /* mountd RPC */ |
| 220 | static void print_in_addr(struct in_addr addr); |
| 221 | static void print_sin_addr(struct sockaddr_in *addr); |
| 222 | static void clear_sinaddr(struct sockaddr_in *sin); |
| 223 | static |
| 224 | struct bootpc_ifcontext *allocifctx(struct bootpc_globalcontext *gctx); |
| 225 | static void bootpc_compose_query(struct bootpc_ifcontext *ifctx, |
| 226 | struct bootpc_globalcontext *gctx, |
| 227 | struct thread *td); |
| 228 | static unsigned char *bootpc_tag(struct bootpc_tagcontext *tctx, |
| 229 | struct bootp_packet *bp, int len, int tag); |
| 230 | static void bootpc_tag_helper(struct bootpc_tagcontext *tctx, |
| 231 | unsigned char *start, int len, int tag); |
| 232 | |
| 233 | #ifdef BOOTP_DEBUG |
| 234 | void bootpboot_p_sa(struct sockaddr *sa,struct sockaddr *ma); |
| 235 | void bootpboot_p_ma(struct sockaddr *ma); |
| 236 | void bootpboot_p_rtentry(struct rtentry *rt); |
| 237 | void bootpboot_p_tree(struct radix_node *rn); |
| 238 | void bootpboot_p_rtlist(void); |
| 239 | void bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa); |
| 240 | void bootpboot_p_iflist(void); |
| 241 | #endif |
| 242 | |
| 243 | static int bootpc_call(struct bootpc_globalcontext *gctx, |
| 244 | struct thread *td); |
| 245 | |
| 246 | static int bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx, |
| 247 | struct bootpc_globalcontext *gctx, |
| 248 | struct thread *td); |
| 249 | |
| 250 | static int bootpc_adjust_interface(struct bootpc_ifcontext *ifctx, |
| 251 | struct bootpc_globalcontext *gctx, |
| 252 | struct thread *td); |
| 253 | |
| 254 | static void bootpc_decode_reply(struct nfsv3_diskless *nd, |
| 255 | struct bootpc_ifcontext *ifctx, |
| 256 | struct bootpc_globalcontext *gctx); |
| 257 | |
| 258 | static int bootpc_received(struct bootpc_globalcontext *gctx, |
| 259 | struct bootpc_ifcontext *ifctx); |
| 260 | |
| 261 | static __inline int bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx); |
| 262 | static __inline int bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx); |
| 263 | static __inline int bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx); |
| 264 | |
| 265 | void bootpc_init(void); |
| 266 | |
| 267 | /* |
| 268 | * In order to have multiple active interfaces with address 0.0.0.0 |
| 269 | * and be able to send data to a selected interface, we perform |
| 270 | * some tricks: |
| 271 | * |
| 272 | * - The 'broadcast' address is different for each interface. |
| 273 | * |
| 274 | * - We temporarily add routing pointing 255.255.255.255 to the |
| 275 | * selected interface broadcast address, thus the packet sent |
| 276 | * goes to that interface. |
| 277 | */ |
| 278 | |
| 279 | #ifdef BOOTP_DEBUG |
| 280 | void |
| 281 | bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma) |
| 282 | { |
| 283 | if (sa == NULL) { |
| 284 | kprintf("(sockaddr *) <null>"); |
| 285 | return; |
| 286 | } |
| 287 | switch (sa->sa_family) { |
| 288 | case AF_INET: |
| 289 | { |
| 290 | struct sockaddr_in *sin; |
| 291 | |
| 292 | sin = (struct sockaddr_in *) sa; |
| 293 | kprintf("inet "); |
| 294 | print_sin_addr(sin); |
| 295 | if (ma != NULL) { |
| 296 | sin = (struct sockaddr_in *) ma; |
| 297 | kprintf(" mask "); |
| 298 | print_sin_addr(sin); |
| 299 | } |
| 300 | } |
| 301 | break; |
| 302 | case AF_LINK: |
| 303 | { |
| 304 | struct sockaddr_dl *sli; |
| 305 | int i; |
| 306 | |
| 307 | sli = (struct sockaddr_dl *) sa; |
| 308 | kprintf("link %.*s ", sli->sdl_nlen, sli->sdl_data); |
| 309 | for (i = 0; i < sli->sdl_alen; i++) { |
| 310 | if (i > 0) |
| 311 | kprintf(":"); |
| 312 | kprintf("%x", ((unsigned char *) LLADDR(sli))[i]); |
| 313 | } |
| 314 | } |
| 315 | break; |
| 316 | default: |
| 317 | kprintf("af%d", sa->sa_family); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | |
| 322 | void |
| 323 | bootpboot_p_ma(struct sockaddr *ma) |
| 324 | { |
| 325 | if (ma == NULL) { |
| 326 | kprintf("<null>"); |
| 327 | return; |
| 328 | } |
| 329 | kprintf("%x", *(int *)ma); |
| 330 | } |
| 331 | |
| 332 | |
| 333 | void |
| 334 | bootpboot_p_rtentry(struct rtentry *rt) |
| 335 | { |
| 336 | bootpboot_p_sa(rt_key(rt), rt_mask(rt)); |
| 337 | kprintf(" "); |
| 338 | bootpboot_p_ma(rt->rt_genmask); |
| 339 | kprintf(" "); |
| 340 | bootpboot_p_sa(rt->rt_gateway, NULL); |
| 341 | kprintf(" "); |
| 342 | kprintf("flags %x", (unsigned short) rt->rt_flags); |
| 343 | kprintf(" %d", (int) rt->rt_rmx.rmx_expire); |
| 344 | kprintf(" %s\n", if_name(rt->rt_ifp)); |
| 345 | } |
| 346 | |
| 347 | |
| 348 | void |
| 349 | bootpboot_p_tree(struct radix_node *rn) |
| 350 | { |
| 351 | while (rn != NULL) { |
| 352 | if (rn->rn_bit < 0) { |
| 353 | if ((rn->rn_flags & RNF_ROOT) != 0) { |
| 354 | } else { |
| 355 | bootpboot_p_rtentry((struct rtentry *) rn); |
| 356 | } |
| 357 | rn = rn->rn_dupedkey; |
| 358 | } else { |
| 359 | bootpboot_p_tree(rn->rn_left); |
| 360 | bootpboot_p_tree(rn->rn_right); |
| 361 | return; |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | |
| 367 | void |
| 368 | bootpboot_p_rtlist(void) |
| 369 | { |
| 370 | kprintf("Routing table:\n"); |
| 371 | bootpboot_p_tree(rt_tables[AF_INET]->rnh_treetop); |
| 372 | } |
| 373 | |
| 374 | |
| 375 | void |
| 376 | bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa) |
| 377 | { |
| 378 | kprintf("%s flags %x, addr ", |
| 379 | if_name(ifp), |
| 380 | (unsigned short) ifp->if_flags); |
| 381 | print_sin_addr((struct sockaddr_in *) ifa->ifa_addr); |
| 382 | kprintf(", broadcast "); |
| 383 | print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr); |
| 384 | kprintf(", netmask "); |
| 385 | print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask); |
| 386 | kprintf("\n"); |
| 387 | } |
| 388 | |
| 389 | |
| 390 | void |
| 391 | bootpboot_p_iflist(void) |
| 392 | { |
| 393 | struct ifnet *ifp; |
| 394 | struct ifaddr_container *ifac; |
| 395 | |
| 396 | kprintf("Interface list:\n"); |
| 397 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 398 | TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { |
| 399 | struct ifaddr *ifa = ifac->ifa; |
| 400 | |
| 401 | if (ifa->ifa_addr->sa_family == AF_INET) |
| 402 | bootpboot_p_if(ifp, ifa); |
| 403 | } |
| 404 | } |
| 405 | } |
| 406 | #endif /* defined(BOOTP_DEBUG) */ |
| 407 | |
| 408 | |
| 409 | static void |
| 410 | clear_sinaddr(struct sockaddr_in *sin) |
| 411 | { |
| 412 | bzero(sin, sizeof(*sin)); |
| 413 | sin->sin_len = sizeof(*sin); |
| 414 | sin->sin_family = AF_INET; |
| 415 | sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */ |
| 416 | sin->sin_port = 0; |
| 417 | } |
| 418 | |
| 419 | |
| 420 | static struct bootpc_ifcontext * |
| 421 | allocifctx(struct bootpc_globalcontext *gctx) |
| 422 | { |
| 423 | struct bootpc_ifcontext *ifctx; |
| 424 | ifctx = (struct bootpc_ifcontext *) kmalloc(sizeof(*ifctx), |
| 425 | M_TEMP, M_WAITOK); |
| 426 | bzero(ifctx, sizeof(*ifctx)); |
| 427 | ifctx->xid = gctx->xid; |
| 428 | #ifdef BOOTP_NO_DHCP |
| 429 | ifctx->state = IF_BOOTP_UNRESOLVED; |
| 430 | #else |
| 431 | ifctx->state = IF_DHCP_UNRESOLVED; |
| 432 | #endif |
| 433 | gctx->xid += 0x100; |
| 434 | return ifctx; |
| 435 | } |
| 436 | |
| 437 | |
| 438 | static __inline int |
| 439 | bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx) |
| 440 | { |
| 441 | if (ifctx->state == IF_BOOTP_RESOLVED || |
| 442 | ifctx->state == IF_DHCP_RESOLVED) |
| 443 | return 1; |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | |
| 448 | static __inline int |
| 449 | bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx) |
| 450 | { |
| 451 | if (ifctx->state == IF_BOOTP_UNRESOLVED || |
| 452 | ifctx->state == IF_DHCP_UNRESOLVED) |
| 453 | return 1; |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | |
| 458 | static __inline int |
| 459 | bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx) |
| 460 | { |
| 461 | if (ifctx->state == IF_BOOTP_FAILED || |
| 462 | ifctx->state == IF_DHCP_FAILED) |
| 463 | return 1; |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | |
| 468 | static int |
| 469 | bootpc_received(struct bootpc_globalcontext *gctx, |
| 470 | struct bootpc_ifcontext *ifctx) |
| 471 | { |
| 472 | unsigned char dhcpreplytype; |
| 473 | char *p; |
| 474 | /* |
| 475 | * Need timeout for fallback to less |
| 476 | * desirable alternative. |
| 477 | */ |
| 478 | |
| 479 | |
| 480 | /* This call used for the side effect (badopt flag) */ |
| 481 | (void) bootpc_tag(&gctx->tmptag, &gctx->reply, |
| 482 | gctx->replylen, |
| 483 | TAG_END); |
| 484 | |
| 485 | /* If packet is invalid, ignore it */ |
| 486 | if (gctx->tmptag.badopt != 0) |
| 487 | return 0; |
| 488 | |
| 489 | p = bootpc_tag(&gctx->tmptag, &gctx->reply, |
| 490 | gctx->replylen, TAG_DHCP_MSGTYPE); |
| 491 | if (p != NULL) |
| 492 | dhcpreplytype = *p; |
| 493 | else |
| 494 | dhcpreplytype = DHCP_NOMSG; |
| 495 | |
| 496 | switch (ifctx->dhcpquerytype) { |
| 497 | case DHCP_DISCOVER: |
| 498 | if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */ |
| 499 | #ifndef BOOTP_FORCE_DHCP |
| 500 | && dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */ |
| 501 | #endif |
| 502 | ) |
| 503 | return 0; |
| 504 | break; |
| 505 | case DHCP_REQUEST: |
| 506 | if (dhcpreplytype != DHCP_ACK) |
| 507 | return 0; |
| 508 | /* fall through */ |
| 509 | case DHCP_NOMSG: |
| 510 | break; |
| 511 | } |
| 512 | |
| 513 | |
| 514 | /* Ignore packet unless it gives us a root tag we didn't have */ |
| 515 | |
| 516 | if ((ifctx->state == IF_BOOTP_RESOLVED || |
| 517 | (ifctx->dhcpquerytype == DHCP_DISCOVER && |
| 518 | (ifctx->state == IF_DHCP_OFFERED || |
| 519 | ifctx->state == IF_DHCP_RESOLVED))) && |
| 520 | (bootpc_tag(&gctx->tmptag, &ifctx->reply, |
| 521 | ifctx->replylen, |
| 522 | TAG_ROOT) != NULL || |
| 523 | bootpc_tag(&gctx->tmptag, &gctx->reply, |
| 524 | gctx->replylen, |
| 525 | TAG_ROOT) == NULL)) |
| 526 | return 0; |
| 527 | |
| 528 | bcopy(&gctx->reply, |
| 529 | &ifctx->reply, |
| 530 | gctx->replylen); |
| 531 | ifctx->replylen = gctx->replylen; |
| 532 | |
| 533 | /* XXX: Only reset if 'perfect' response */ |
| 534 | if (ifctx->state == IF_BOOTP_UNRESOLVED) |
| 535 | ifctx->state = IF_BOOTP_RESOLVED; |
| 536 | else if (ifctx->state == IF_DHCP_UNRESOLVED && |
| 537 | ifctx->dhcpquerytype == DHCP_DISCOVER) { |
| 538 | if (dhcpreplytype == DHCP_OFFER) |
| 539 | ifctx->state = IF_DHCP_OFFERED; |
| 540 | else |
| 541 | ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */ |
| 542 | } else if (ifctx->state == IF_DHCP_OFFERED && |
| 543 | ifctx->dhcpquerytype == DHCP_REQUEST) |
| 544 | ifctx->state = IF_DHCP_RESOLVED; |
| 545 | |
| 546 | |
| 547 | if (ifctx->dhcpquerytype == DHCP_DISCOVER && |
| 548 | ifctx->state != IF_BOOTP_RESOLVED) { |
| 549 | p = bootpc_tag(&gctx->tmptag, &ifctx->reply, |
| 550 | ifctx->replylen, TAG_DHCP_SERVERID); |
| 551 | if (p != NULL && gctx->tmptag.taglen == 4) { |
| 552 | memcpy(&ifctx->dhcpserver, p, 4); |
| 553 | ifctx->gotdhcpserver = 1; |
| 554 | } else |
| 555 | ifctx->gotdhcpserver = 0; |
| 556 | return 1; |
| 557 | } |
| 558 | |
| 559 | ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply, |
| 560 | ifctx->replylen, |
| 561 | TAG_ROOT) != NULL); |
| 562 | ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply, |
| 563 | ifctx->replylen, |
| 564 | TAG_ROUTERS) != NULL); |
| 565 | ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply, |
| 566 | ifctx->replylen, |
| 567 | TAG_SUBNETMASK) != NULL); |
| 568 | return 1; |
| 569 | } |
| 570 | |
| 571 | static int |
| 572 | bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td) |
| 573 | { |
| 574 | struct socket *so; |
| 575 | struct sockaddr_in *sin, dst; |
| 576 | struct uio auio; |
| 577 | struct sockopt sopt; |
| 578 | struct iovec aio; |
| 579 | int error, on, rcvflg, timo, len; |
| 580 | time_t atimo; |
| 581 | time_t rtimo; |
| 582 | struct timeval tv; |
| 583 | struct bootpc_ifcontext *ifctx; |
| 584 | int outstanding; |
| 585 | int gotrootpath; |
| 586 | int retry; |
| 587 | const char *s; |
| 588 | |
| 589 | /* |
| 590 | * Create socket and set its recieve timeout. |
| 591 | */ |
| 592 | error = socreate(AF_INET, &so, SOCK_DGRAM, 0, td); |
| 593 | if (error != 0) |
| 594 | goto out; |
| 595 | |
| 596 | tv.tv_sec = 1; |
| 597 | tv.tv_usec = 0; |
| 598 | bzero(&sopt, sizeof(sopt)); |
| 599 | sopt.sopt_level = SOL_SOCKET; |
| 600 | sopt.sopt_name = SO_RCVTIMEO; |
| 601 | sopt.sopt_val = &tv; |
| 602 | sopt.sopt_valsize = sizeof tv; |
| 603 | |
| 604 | error = sosetopt(so, &sopt); |
| 605 | if (error != 0) |
| 606 | goto out; |
| 607 | |
| 608 | /* |
| 609 | * Enable broadcast. |
| 610 | */ |
| 611 | on = 1; |
| 612 | sopt.sopt_name = SO_BROADCAST; |
| 613 | sopt.sopt_val = &on; |
| 614 | sopt.sopt_valsize = sizeof on; |
| 615 | |
| 616 | error = sosetopt(so, &sopt); |
| 617 | if (error != 0) |
| 618 | goto out; |
| 619 | |
| 620 | /* |
| 621 | * Disable routing. |
| 622 | */ |
| 623 | |
| 624 | on = 1; |
| 625 | sopt.sopt_name = SO_DONTROUTE; |
| 626 | sopt.sopt_val = &on; |
| 627 | sopt.sopt_valsize = sizeof on; |
| 628 | |
| 629 | error = sosetopt(so, &sopt); |
| 630 | if (error != 0) |
| 631 | goto out; |
| 632 | |
| 633 | /* |
| 634 | * Bind the local endpoint to a bootp client port. |
| 635 | */ |
| 636 | sin = &dst; |
| 637 | clear_sinaddr(sin); |
| 638 | sin->sin_port = htons(IPPORT_BOOTPC); |
| 639 | error = sobind(so, (struct sockaddr *)sin, td); |
| 640 | if (error != 0) { |
| 641 | kprintf("bind failed\n"); |
| 642 | goto out; |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * Setup socket address for the server. |
| 647 | */ |
| 648 | sin = &dst; |
| 649 | clear_sinaddr(sin); |
| 650 | sin->sin_addr.s_addr = INADDR_BROADCAST; |
| 651 | sin->sin_port = htons(IPPORT_BOOTPS); |
| 652 | |
| 653 | /* |
| 654 | * Send it, repeatedly, until a reply is received, |
| 655 | * but delay each re-send by an increasing amount. |
| 656 | * If the delay hits the maximum, start complaining. |
| 657 | */ |
| 658 | timo = 0; |
| 659 | rtimo = 0; |
| 660 | for (;;) { |
| 661 | |
| 662 | outstanding = 0; |
| 663 | gotrootpath = 0; |
| 664 | |
| 665 | for (ifctx = gctx->interfaces; |
| 666 | ifctx != NULL; |
| 667 | ifctx = ifctx->next) { |
| 668 | if (bootpc_ifctx_isresolved(ifctx) != 0 && |
| 669 | bootpc_tag(&gctx->tmptag, &ifctx->reply, |
| 670 | ifctx->replylen, |
| 671 | TAG_ROOT) != NULL) |
| 672 | gotrootpath = 1; |
| 673 | } |
| 674 | |
| 675 | for (ifctx = gctx->interfaces; |
| 676 | ifctx != NULL; |
| 677 | ifctx = ifctx->next) { |
| 678 | ifctx->outstanding = 0; |
| 679 | if (bootpc_ifctx_isresolved(ifctx) != 0 && |
| 680 | gotrootpath != 0) { |
| 681 | continue; |
| 682 | } |
| 683 | if (bootpc_ifctx_isfailed(ifctx) != 0) |
| 684 | continue; |
| 685 | |
| 686 | outstanding++; |
| 687 | ifctx->outstanding = 1; |
| 688 | |
| 689 | /* Proceed to next step in DHCP negotiation */ |
| 690 | if ((ifctx->state == IF_DHCP_OFFERED && |
| 691 | ifctx->dhcpquerytype != DHCP_REQUEST) || |
| 692 | (ifctx->state == IF_DHCP_UNRESOLVED && |
| 693 | ifctx->dhcpquerytype != DHCP_DISCOVER) || |
| 694 | (ifctx->state == IF_BOOTP_UNRESOLVED && |
| 695 | ifctx->dhcpquerytype != DHCP_NOMSG)) { |
| 696 | ifctx->sentmsg = 0; |
| 697 | bootpc_compose_query(ifctx, gctx, td); |
| 698 | } |
| 699 | |
| 700 | /* Send BOOTP request (or re-send). */ |
| 701 | |
| 702 | if (ifctx->sentmsg == 0) { |
| 703 | switch(ifctx->dhcpquerytype) { |
| 704 | case DHCP_DISCOVER: |
| 705 | s = "DHCP Discover"; |
| 706 | break; |
| 707 | case DHCP_REQUEST: |
| 708 | s = "DHCP Request"; |
| 709 | break; |
| 710 | case DHCP_NOMSG: |
| 711 | default: |
| 712 | s = "BOOTP Query"; |
| 713 | break; |
| 714 | } |
| 715 | kprintf("Sending %s packet from " |
| 716 | "interface %s (%*D)\n", |
| 717 | s, |
| 718 | ifctx->ireq.ifr_name, |
| 719 | ifctx->sdl->sdl_alen, |
| 720 | (unsigned char *) LLADDR(ifctx->sdl), |
| 721 | ":"); |
| 722 | ifctx->sentmsg = 1; |
| 723 | } |
| 724 | |
| 725 | aio.iov_base = (caddr_t) &ifctx->call; |
| 726 | aio.iov_len = sizeof(ifctx->call); |
| 727 | |
| 728 | auio.uio_iov = &aio; |
| 729 | auio.uio_iovcnt = 1; |
| 730 | auio.uio_segflg = UIO_SYSSPACE; |
| 731 | auio.uio_rw = UIO_WRITE; |
| 732 | auio.uio_offset = 0; |
| 733 | auio.uio_resid = sizeof(ifctx->call); |
| 734 | auio.uio_td = td; |
| 735 | |
| 736 | /* Set netmask to 0.0.0.0 */ |
| 737 | |
| 738 | sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr; |
| 739 | clear_sinaddr(sin); |
| 740 | error = ifioctl(ifctx->so, SIOCSIFNETMASK, |
| 741 | (caddr_t) &ifctx->ireq, proc0.p_ucred); |
| 742 | if (error != 0) |
| 743 | panic("bootpc_call:" |
| 744 | "set if netmask, error=%d", |
| 745 | error); |
| 746 | |
| 747 | error = sosend(so, (struct sockaddr *) &dst, |
| 748 | &auio, NULL, NULL, 0, td); |
| 749 | if (error != 0) { |
| 750 | kprintf("bootpc_call: sosend: %d state %08x\n", |
| 751 | error, (int) so->so_state); |
| 752 | } |
| 753 | |
| 754 | /* XXX: Is this needed ? */ |
| 755 | tsleep(&error, 0, "bootpw", 10); |
| 756 | |
| 757 | /* Set netmask to 255.0.0.0 */ |
| 758 | |
| 759 | sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr; |
| 760 | clear_sinaddr(sin); |
| 761 | sin->sin_addr.s_addr = htonl(0xff000000u); |
| 762 | error = ifioctl(ifctx->so, SIOCSIFNETMASK, |
| 763 | (caddr_t) &ifctx->ireq, proc0.p_ucred); |
| 764 | if (error != 0) |
| 765 | panic("bootpc_call:" |
| 766 | "set if netmask, error=%d", |
| 767 | error); |
| 768 | |
| 769 | } |
| 770 | |
| 771 | if (outstanding == 0 && |
| 772 | (rtimo == 0 || time_second >= rtimo)) { |
| 773 | error = 0; |
| 774 | goto gotreply; |
| 775 | } |
| 776 | |
| 777 | /* Determine new timeout. */ |
| 778 | if (timo < MAX_RESEND_DELAY) |
| 779 | timo++; |
| 780 | else { |
| 781 | kprintf("DHCP/BOOTP timeout for server "); |
| 782 | print_sin_addr(&dst); |
| 783 | kprintf("\n"); |
| 784 | } |
| 785 | |
| 786 | /* |
| 787 | * Wait for up to timo seconds for a reply. |
| 788 | * The socket receive timeout was set to 1 second. |
| 789 | */ |
| 790 | atimo = timo + time_second; |
| 791 | while (time_second < atimo) { |
| 792 | aio.iov_base = (caddr_t) &gctx->reply; |
| 793 | aio.iov_len = sizeof(gctx->reply); |
| 794 | |
| 795 | auio.uio_iov = &aio; |
| 796 | auio.uio_iovcnt = 1; |
| 797 | auio.uio_segflg = UIO_SYSSPACE; |
| 798 | auio.uio_rw = UIO_READ; |
| 799 | auio.uio_offset = 0; |
| 800 | auio.uio_resid = sizeof(gctx->reply); |
| 801 | auio.uio_td = td; |
| 802 | |
| 803 | rcvflg = 0; |
| 804 | error = soreceive(so, NULL, &auio, |
| 805 | NULL, NULL, &rcvflg); |
| 806 | gctx->secs = time_second - gctx->starttime; |
| 807 | for (ifctx = gctx->interfaces; |
| 808 | ifctx != NULL; |
| 809 | ifctx = ifctx->next) { |
| 810 | if (bootpc_ifctx_isresolved(ifctx) != 0 || |
| 811 | bootpc_ifctx_isfailed(ifctx) != 0) |
| 812 | continue; |
| 813 | |
| 814 | ifctx->call.secs = htons(gctx->secs); |
| 815 | } |
| 816 | if (error == EWOULDBLOCK) |
| 817 | continue; |
| 818 | if (error != 0) |
| 819 | goto out; |
| 820 | len = sizeof(gctx->reply) - auio.uio_resid; |
| 821 | |
| 822 | /* Do we have the required number of bytes ? */ |
| 823 | if (len < BOOTP_MIN_LEN) |
| 824 | continue; |
| 825 | gctx->replylen = len; |
| 826 | |
| 827 | /* Is it a reply? */ |
| 828 | if (gctx->reply.op != BOOTP_REPLY) |
| 829 | continue; |
| 830 | |
| 831 | /* Is this an answer to our query */ |
| 832 | for (ifctx = gctx->interfaces; |
| 833 | ifctx != NULL; |
| 834 | ifctx = ifctx->next) { |
| 835 | if (gctx->reply.xid != ifctx->call.xid) |
| 836 | continue; |
| 837 | |
| 838 | /* Same HW address size ? */ |
| 839 | if (gctx->reply.hlen != ifctx->call.hlen) |
| 840 | continue; |
| 841 | |
| 842 | /* Correct HW address ? */ |
| 843 | if (bcmp(gctx->reply.chaddr, |
| 844 | ifctx->call.chaddr, |
| 845 | ifctx->call.hlen) != 0) |
| 846 | continue; |
| 847 | |
| 848 | break; |
| 849 | } |
| 850 | |
| 851 | if (ifctx != NULL) { |
| 852 | s = bootpc_tag(&gctx->tmptag, |
| 853 | &gctx->reply, |
| 854 | gctx->replylen, |
| 855 | TAG_DHCP_MSGTYPE); |
| 856 | if (s != NULL) { |
| 857 | switch (*s) { |
| 858 | case DHCP_OFFER: |
| 859 | s = "DHCP Offer"; |
| 860 | break; |
| 861 | case DHCP_ACK: |
| 862 | s = "DHCP Ack"; |
| 863 | break; |
| 864 | default: |
| 865 | s = "DHCP (unexpected)"; |
| 866 | break; |
| 867 | } |
| 868 | } else |
| 869 | s = "BOOTP Reply"; |
| 870 | |
| 871 | kprintf("Received %s packet" |
| 872 | " on %s from ", |
| 873 | s, |
| 874 | ifctx->ireq.ifr_name); |
| 875 | print_in_addr(gctx->reply.siaddr); |
| 876 | if (gctx->reply.giaddr.s_addr != |
| 877 | htonl(INADDR_ANY)) { |
| 878 | kprintf(" via "); |
| 879 | print_in_addr(gctx->reply.giaddr); |
| 880 | } |
| 881 | if (bootpc_received(gctx, ifctx) != 0) { |
| 882 | kprintf(" (accepted)"); |
| 883 | if (ifctx->outstanding) { |
| 884 | ifctx->outstanding = 0; |
| 885 | outstanding--; |
| 886 | } |
| 887 | /* Network settle delay */ |
| 888 | if (outstanding == 0) |
| 889 | atimo = time_second + |
| 890 | BOOTP_SETTLE_DELAY; |
| 891 | } else |
| 892 | kprintf(" (ignored)"); |
| 893 | if (ifctx->gotrootpath) { |
| 894 | gotrootpath = 1; |
| 895 | rtimo = time_second + |
| 896 | BOOTP_SETTLE_DELAY; |
| 897 | kprintf(" (got root path)"); |
| 898 | } else |
| 899 | kprintf(" (no root path)"); |
| 900 | kprintf("\n"); |
| 901 | } |
| 902 | } /* while secs */ |
| 903 | #ifdef BOOTP_TIMEOUT |
| 904 | if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0) |
| 905 | break; |
| 906 | #endif |
| 907 | /* Force a retry if halfway in DHCP negotiation */ |
| 908 | retry = 0; |
| 909 | for (ifctx = gctx->interfaces; ifctx != NULL; |
| 910 | ifctx = ifctx->next) { |
| 911 | if (ifctx->state == IF_DHCP_OFFERED) { |
| 912 | if (ifctx->dhcpquerytype == DHCP_DISCOVER) |
| 913 | retry = 1; |
| 914 | else |
| 915 | ifctx->state = IF_DHCP_UNRESOLVED; |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | if (retry != 0) |
| 920 | continue; |
| 921 | |
| 922 | if (gotrootpath != 0) { |
| 923 | gctx->gotrootpath = gotrootpath; |
| 924 | if (rtimo != 0 && time_second >= rtimo) |
| 925 | break; |
| 926 | } |
| 927 | } /* forever send/receive */ |
| 928 | |
| 929 | /* |
| 930 | * XXX: These are errors of varying seriousness being silently |
| 931 | * ignored |
| 932 | */ |
| 933 | |
| 934 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) { |
| 935 | if (bootpc_ifctx_isresolved(ifctx) == 0) { |
| 936 | kprintf("%s timeout for interface %s\n", |
| 937 | ifctx->dhcpquerytype != DHCP_NOMSG ? |
| 938 | "DHCP" : "BOOTP", |
| 939 | ifctx->ireq.ifr_name); |
| 940 | } |
| 941 | } |
| 942 | if (gctx->gotrootpath != 0) { |
| 943 | #if 0 |
| 944 | kprintf("Got a root path, ignoring remaining timeout\n"); |
| 945 | #endif |
| 946 | error = 0; |
| 947 | goto out; |
| 948 | } |
| 949 | #ifndef BOOTP_NFSROOT |
| 950 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) { |
| 951 | if (bootpc_ifctx_isresolved(ifctx) != 0) { |
| 952 | error = 0; |
| 953 | goto out; |
| 954 | } |
| 955 | } |
| 956 | #endif |
| 957 | error = ETIMEDOUT; |
| 958 | goto out; |
| 959 | |
| 960 | gotreply: |
| 961 | out: |
| 962 | soclose(so, FNONBLOCK); |
| 963 | return error; |
| 964 | } |
| 965 | |
| 966 | |
| 967 | static int |
| 968 | bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx, |
| 969 | struct bootpc_globalcontext *gctx, |
| 970 | struct thread *td) |
| 971 | { |
| 972 | struct ifaddr_container *ifac; |
| 973 | struct sockaddr_in *sin; |
| 974 | int error; |
| 975 | |
| 976 | struct ifreq *ireq; |
| 977 | struct socket *so; |
| 978 | struct sockaddr_dl *sdl; |
| 979 | |
| 980 | error = socreate(AF_INET, &ifctx->so, SOCK_DGRAM, 0, td); |
| 981 | if (error != 0) |
| 982 | panic("nfs_boot: socreate, error=%d", error); |
| 983 | |
| 984 | ireq = &ifctx->ireq; |
| 985 | so = ifctx->so; |
| 986 | |
| 987 | /* |
| 988 | * Bring up the interface. |
| 989 | * |
| 990 | * Get the old interface flags and or IFF_UP into them; if |
| 991 | * IFF_UP set blindly, interface selection can be clobbered. |
| 992 | */ |
| 993 | error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, proc0.p_ucred); |
| 994 | if (error != 0) |
| 995 | panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error); |
| 996 | ireq->ifr_flags |= IFF_UP; |
| 997 | error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, proc0.p_ucred); |
| 998 | if (error != 0) |
| 999 | panic("bootpc_fakeup_interface: SIFFLAGS, error=%d", error); |
| 1000 | |
| 1001 | /* |
| 1002 | * Do enough of ifconfig(8) so that the chosen interface |
| 1003 | * can talk to the servers. (just set the address) |
| 1004 | */ |
| 1005 | |
| 1006 | /* addr is 0.0.0.0 */ |
| 1007 | |
| 1008 | sin = (struct sockaddr_in *) &ireq->ifr_addr; |
| 1009 | clear_sinaddr(sin); |
| 1010 | error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, proc0.p_ucred); |
| 1011 | if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces)) |
| 1012 | panic("bootpc_fakeup_interface: " |
| 1013 | "set if addr, error=%d", error); |
| 1014 | |
| 1015 | /* netmask is 255.0.0.0 */ |
| 1016 | |
| 1017 | sin = (struct sockaddr_in *) &ireq->ifr_addr; |
| 1018 | clear_sinaddr(sin); |
| 1019 | sin->sin_addr.s_addr = htonl(0xff000000u); |
| 1020 | error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, proc0.p_ucred); |
| 1021 | if (error != 0) |
| 1022 | panic("bootpc_fakeup_interface: set if netmask, error=%d", |
| 1023 | error); |
| 1024 | |
| 1025 | /* Broadcast is 255.255.255.255 */ |
| 1026 | |
| 1027 | sin = (struct sockaddr_in *)&ireq->ifr_addr; |
| 1028 | clear_sinaddr(sin); |
| 1029 | clear_sinaddr(&ifctx->broadcast); |
| 1030 | sin->sin_addr.s_addr = htonl(INADDR_BROADCAST); |
| 1031 | ifctx->broadcast.sin_addr.s_addr = sin->sin_addr.s_addr; |
| 1032 | |
| 1033 | error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, proc0.p_ucred); |
| 1034 | if (error != 0 && error != EADDRNOTAVAIL) |
| 1035 | panic("bootpc_fakeup_interface: " |
| 1036 | "set if broadcast addr, error=%d", |
| 1037 | error); |
| 1038 | error = 0; |
| 1039 | |
| 1040 | /* Get HW address */ |
| 1041 | |
| 1042 | sdl = NULL; |
| 1043 | TAILQ_FOREACH(ifac, &ifctx->ifp->if_addrheads[mycpuid], ifa_link) { |
| 1044 | struct ifaddr *ifa = ifac->ifa; |
| 1045 | |
| 1046 | if (ifa->ifa_addr->sa_family == AF_LINK && |
| 1047 | (sdl = ((struct sockaddr_dl *) ifa->ifa_addr)) != NULL && |
| 1048 | sdl->sdl_type == IFT_ETHER) |
| 1049 | break; |
| 1050 | } |
| 1051 | |
| 1052 | if (sdl == NULL) |
| 1053 | panic("bootpc: Unable to find HW address for %s", |
| 1054 | ifctx->ireq.ifr_name); |
| 1055 | ifctx->sdl = sdl; |
| 1056 | |
| 1057 | return error; |
| 1058 | } |
| 1059 | |
| 1060 | |
| 1061 | static int |
| 1062 | bootpc_adjust_interface(struct bootpc_ifcontext *ifctx, |
| 1063 | struct bootpc_globalcontext *gctx, |
| 1064 | struct thread *td) |
| 1065 | { |
| 1066 | int error; |
| 1067 | struct sockaddr_in defdst; |
| 1068 | struct sockaddr_in defmask; |
| 1069 | struct sockaddr_in *sin; |
| 1070 | |
| 1071 | struct ifreq *ireq; |
| 1072 | struct socket *so; |
| 1073 | struct sockaddr_in *myaddr; |
| 1074 | struct sockaddr_in *netmask; |
| 1075 | struct sockaddr_in *gw; |
| 1076 | |
| 1077 | ireq = &ifctx->ireq; |
| 1078 | so = ifctx->so; |
| 1079 | myaddr = &ifctx->myaddr; |
| 1080 | netmask = &ifctx->netmask; |
| 1081 | gw = &ifctx->gw; |
| 1082 | |
| 1083 | if (bootpc_ifctx_isresolved(ifctx) == 0) { |
| 1084 | |
| 1085 | /* Shutdown interfaces where BOOTP failed */ |
| 1086 | |
| 1087 | kprintf("Shutdown interface %s\n", ifctx->ireq.ifr_name); |
| 1088 | error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, proc0.p_ucred); |
| 1089 | if (error != 0) |
| 1090 | panic("bootpc_adjust_interface: " |
| 1091 | "SIOCGIFFLAGS, error=%d", error); |
| 1092 | ireq->ifr_flags &= ~IFF_UP; |
| 1093 | error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, proc0.p_ucred); |
| 1094 | if (error != 0) |
| 1095 | panic("bootpc_adjust_interface: " |
| 1096 | "SIOCSIFFLAGS, error=%d", error); |
| 1097 | |
| 1098 | sin = (struct sockaddr_in *) &ireq->ifr_addr; |
| 1099 | clear_sinaddr(sin); |
| 1100 | error = ifioctl(so, SIOCDIFADDR, (caddr_t) ireq, proc0.p_ucred); |
| 1101 | if (error != 0 && (error != EADDRNOTAVAIL || |
| 1102 | ifctx == gctx->interfaces)) |
| 1103 | panic("bootpc_adjust_interface: " |
| 1104 | "SIOCDIFADDR, error=%d", error); |
| 1105 | |
| 1106 | return 0; |
| 1107 | } |
| 1108 | |
| 1109 | kprintf("Adjusted interface %s\n", ifctx->ireq.ifr_name); |
| 1110 | /* |
| 1111 | * Do enough of ifconfig(8) so that the chosen interface |
| 1112 | * can talk to the servers. (just set the address) |
| 1113 | */ |
| 1114 | bcopy(netmask, &ireq->ifr_addr, sizeof(*netmask)); |
| 1115 | error = ifioctl(so, SIOCSIFNETMASK, (caddr_t) ireq, proc0.p_ucred); |
| 1116 | if (error != 0) |
| 1117 | panic("bootpc_adjust_interface: " |
| 1118 | "set if netmask, error=%d", error); |
| 1119 | |
| 1120 | /* Broadcast is with host part of IP address all 1's */ |
| 1121 | |
| 1122 | sin = (struct sockaddr_in *) &ireq->ifr_addr; |
| 1123 | clear_sinaddr(sin); |
| 1124 | sin->sin_addr.s_addr = myaddr->sin_addr.s_addr | |
| 1125 | ~ netmask->sin_addr.s_addr; |
| 1126 | error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t) ireq, proc0.p_ucred); |
| 1127 | if (error != 0) |
| 1128 | panic("bootpc_adjust_interface: " |
| 1129 | "set if broadcast addr, error=%d", error); |
| 1130 | |
| 1131 | bcopy(myaddr, &ireq->ifr_addr, sizeof(*myaddr)); |
| 1132 | error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, proc0.p_ucred); |
| 1133 | if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces)) |
| 1134 | panic("bootpc_adjust_interface: " |
| 1135 | "set if addr, error=%d", error); |
| 1136 | |
| 1137 | /* Add new default route */ |
| 1138 | |
| 1139 | if (ifctx->gotgw != 0 || gctx->gotgw == 0) { |
| 1140 | clear_sinaddr(&defdst); |
| 1141 | clear_sinaddr(&defmask); |
| 1142 | error = rtrequest_global(RTM_ADD, (struct sockaddr *) &defdst, |
| 1143 | (struct sockaddr *) gw, |
| 1144 | (struct sockaddr *) &defmask, |
| 1145 | (RTF_UP | RTF_GATEWAY | RTF_STATIC)); |
| 1146 | if (error != 0) { |
| 1147 | kprintf("bootpc_adjust_interface: " |
| 1148 | "add net route, error=%d\n", error); |
| 1149 | return error; |
| 1150 | } |
| 1151 | } |
| 1152 | |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
| 1156 | static void |
| 1157 | print_sin_addr(struct sockaddr_in *sin) |
| 1158 | { |
| 1159 | print_in_addr(sin->sin_addr); |
| 1160 | } |
| 1161 | |
| 1162 | |
| 1163 | static void |
| 1164 | print_in_addr(struct in_addr addr) |
| 1165 | { |
| 1166 | unsigned int ip; |
| 1167 | |
| 1168 | ip = ntohl(addr.s_addr); |
| 1169 | kprintf("%d.%d.%d.%d", |
| 1170 | ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255); |
| 1171 | } |
| 1172 | |
| 1173 | static void |
| 1174 | bootpc_compose_query(struct bootpc_ifcontext *ifctx, |
| 1175 | struct bootpc_globalcontext *gctx, struct thread *td) |
| 1176 | { |
| 1177 | unsigned char *vendp; |
| 1178 | unsigned char vendor_client[64]; |
| 1179 | uint32_t leasetime; |
| 1180 | uint8_t vendor_client_len; |
| 1181 | |
| 1182 | ifctx->gotrootpath = 0; |
| 1183 | |
| 1184 | bzero((caddr_t) &ifctx->call, sizeof(ifctx->call)); |
| 1185 | |
| 1186 | /* bootpc part */ |
| 1187 | ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */ |
| 1188 | ifctx->call.htype = 1; /* 10mb ethernet */ |
| 1189 | ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */ |
| 1190 | ifctx->call.hops = 0; |
| 1191 | if (bootpc_ifctx_isunresolved(ifctx) != 0) |
| 1192 | ifctx->xid++; |
| 1193 | ifctx->call.xid = txdr_unsigned(ifctx->xid); |
| 1194 | bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen); |
| 1195 | |
| 1196 | vendp = ifctx->call.vend; |
| 1197 | *vendp++ = 99; /* RFC1048 cookie */ |
| 1198 | *vendp++ = 130; |
| 1199 | *vendp++ = 83; |
| 1200 | *vendp++ = 99; |
| 1201 | *vendp++ = TAG_MAXMSGSIZE; |
| 1202 | *vendp++ = 2; |
| 1203 | *vendp++ = (sizeof(struct bootp_packet) >> 8) & 255; |
| 1204 | *vendp++ = sizeof(struct bootp_packet) & 255; |
| 1205 | |
| 1206 | ksnprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s", |
| 1207 | ostype, MACHINE, osrelease); |
| 1208 | vendor_client_len = strlen(vendor_client); |
| 1209 | *vendp++ = TAG_VENDOR_INDENTIFIER; |
| 1210 | *vendp++ = vendor_client_len; |
| 1211 | memcpy(vendp, vendor_client, vendor_client_len); |
| 1212 | vendp += vendor_client_len; |
| 1213 | ifctx->dhcpquerytype = DHCP_NOMSG; |
| 1214 | switch (ifctx->state) { |
| 1215 | case IF_DHCP_UNRESOLVED: |
| 1216 | *vendp++ = TAG_DHCP_MSGTYPE; |
| 1217 | *vendp++ = 1; |
| 1218 | *vendp++ = DHCP_DISCOVER; |
| 1219 | ifctx->dhcpquerytype = DHCP_DISCOVER; |
| 1220 | ifctx->gotdhcpserver = 0; |
| 1221 | break; |
| 1222 | case IF_DHCP_OFFERED: |
| 1223 | *vendp++ = TAG_DHCP_MSGTYPE; |
| 1224 | *vendp++ = 1; |
| 1225 | *vendp++ = DHCP_REQUEST; |
| 1226 | ifctx->dhcpquerytype = DHCP_REQUEST; |
| 1227 | *vendp++ = TAG_DHCP_REQ_ADDR; |
| 1228 | *vendp++ = 4; |
| 1229 | memcpy(vendp, &ifctx->reply.yiaddr, 4); |
| 1230 | vendp += 4; |
| 1231 | if (ifctx->gotdhcpserver != 0) { |
| 1232 | *vendp++ = TAG_DHCP_SERVERID; |
| 1233 | *vendp++ = 4; |
| 1234 | memcpy(vendp, &ifctx->dhcpserver, 4); |
| 1235 | vendp += 4; |
| 1236 | } |
| 1237 | *vendp++ = TAG_DHCP_LEASETIME; |
| 1238 | *vendp++ = 4; |
| 1239 | leasetime = htonl(300); |
| 1240 | memcpy(vendp, &leasetime, 4); |
| 1241 | vendp += 4; |
| 1242 | default: |
| 1243 | ; |
| 1244 | } |
| 1245 | *vendp = TAG_END; |
| 1246 | |
| 1247 | ifctx->call.secs = 0; |
| 1248 | ifctx->call.flags = htons(0x8000); /* We need an broadcast answer */ |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | static int |
| 1253 | bootpc_hascookie(struct bootp_packet *bp) |
| 1254 | { |
| 1255 | return (bp->vend[0] == 99 && bp->vend[1] == 130 && |
| 1256 | bp->vend[2] == 83 && bp->vend[3] == 99); |
| 1257 | } |
| 1258 | |
| 1259 | |
| 1260 | static void |
| 1261 | bootpc_tag_helper(struct bootpc_tagcontext *tctx, |
| 1262 | unsigned char *start, int len, int tag) |
| 1263 | { |
| 1264 | unsigned char *j; |
| 1265 | unsigned char *ej; |
| 1266 | unsigned char code; |
| 1267 | |
| 1268 | if (tctx->badtag != 0 || tctx->badopt != 0) |
| 1269 | return; |
| 1270 | |
| 1271 | j = start; |
| 1272 | ej = j + len; |
| 1273 | |
| 1274 | while (j < ej) { |
| 1275 | code = *j++; |
| 1276 | if (code == TAG_PAD) |
| 1277 | continue; |
| 1278 | if (code == TAG_END) |
| 1279 | return; |
| 1280 | if (j >= ej || j + *j + 1 > ej) { |
| 1281 | tctx->badopt = 1; |
| 1282 | return; |
| 1283 | } |
| 1284 | len = *j++; |
| 1285 | if (code == tag) { |
| 1286 | if (tctx->taglen + len > TAG_MAXLEN) { |
| 1287 | tctx->badtag = 1; |
| 1288 | return; |
| 1289 | } |
| 1290 | tctx->foundopt = 1; |
| 1291 | if (len > 0) |
| 1292 | memcpy(tctx->buf + tctx->taglen, |
| 1293 | j, len); |
| 1294 | tctx->taglen += len; |
| 1295 | } |
| 1296 | if (code == TAG_OVERLOAD) |
| 1297 | tctx->overload = *j; |
| 1298 | |
| 1299 | j += len; |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | |
| 1304 | static unsigned char * |
| 1305 | bootpc_tag(struct bootpc_tagcontext *tctx, struct bootp_packet *bp, |
| 1306 | int len, int tag) |
| 1307 | { |
| 1308 | unsigned char *j; |
| 1309 | unsigned char *ej; |
| 1310 | |
| 1311 | tctx->overload = 0; |
| 1312 | tctx->badopt = 0; |
| 1313 | tctx->badtag = 0; |
| 1314 | tctx->foundopt = 0; |
| 1315 | tctx->taglen = 0; |
| 1316 | |
| 1317 | if (bootpc_hascookie(bp) == 0) |
| 1318 | return NULL; |
| 1319 | |
| 1320 | j = &bp->vend[4]; |
| 1321 | ej = (unsigned char *) bp + len; |
| 1322 | |
| 1323 | bootpc_tag_helper(tctx, &bp->vend[4], |
| 1324 | (unsigned char *) bp + len - &bp->vend[4], tag); |
| 1325 | |
| 1326 | if ((tctx->overload & OVERLOAD_FILE) != 0) |
| 1327 | bootpc_tag_helper(tctx, |
| 1328 | (unsigned char *) bp->file, |
| 1329 | sizeof(bp->file), |
| 1330 | tag); |
| 1331 | if ((tctx->overload & OVERLOAD_SNAME) != 0) |
| 1332 | bootpc_tag_helper(tctx, |
| 1333 | (unsigned char *) bp->sname, |
| 1334 | sizeof(bp->sname), |
| 1335 | tag); |
| 1336 | |
| 1337 | if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0) |
| 1338 | return NULL; |
| 1339 | tctx->buf[tctx->taglen] = '\0'; |
| 1340 | return tctx->buf; |
| 1341 | } |
| 1342 | |
| 1343 | |
| 1344 | static void |
| 1345 | bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx, |
| 1346 | struct bootpc_globalcontext *gctx) |
| 1347 | { |
| 1348 | char *p; |
| 1349 | unsigned int ip; |
| 1350 | |
| 1351 | ifctx->gotgw = 0; |
| 1352 | ifctx->gotnetmask = 0; |
| 1353 | |
| 1354 | clear_sinaddr(&ifctx->myaddr); |
| 1355 | clear_sinaddr(&ifctx->netmask); |
| 1356 | clear_sinaddr(&ifctx->gw); |
| 1357 | |
| 1358 | ifctx->myaddr.sin_addr = ifctx->reply.yiaddr; |
| 1359 | |
| 1360 | ip = ntohl(ifctx->myaddr.sin_addr.s_addr); |
| 1361 | ksnprintf(gctx->lookup_path, sizeof(gctx->lookup_path), |
| 1362 | "swap.%d.%d.%d.%d", |
| 1363 | ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255); |
| 1364 | |
| 1365 | kprintf("%s at ", ifctx->ireq.ifr_name); |
| 1366 | print_sin_addr(&ifctx->myaddr); |
| 1367 | kprintf(" server "); |
| 1368 | print_in_addr(ifctx->reply.siaddr); |
| 1369 | |
| 1370 | ifctx->gw.sin_addr = ifctx->reply.giaddr; |
| 1371 | if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) { |
| 1372 | kprintf(" via gateway "); |
| 1373 | print_in_addr(ifctx->reply.giaddr); |
| 1374 | } |
| 1375 | |
| 1376 | /* This call used for the side effect (overload flag) */ |
| 1377 | (void) bootpc_tag(&gctx->tmptag, |
| 1378 | &ifctx->reply, ifctx->replylen, TAG_END); |
| 1379 | |
| 1380 | if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0) |
| 1381 | if (ifctx->reply.sname[0] != '\0') |
| 1382 | kprintf(" server name %s", ifctx->reply.sname); |
| 1383 | if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0) |
| 1384 | if (ifctx->reply.file[0] != '\0') |
| 1385 | kprintf(" boot file %s", ifctx->reply.file); |
| 1386 | |
| 1387 | kprintf("\n"); |
| 1388 | |
| 1389 | p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen, |
| 1390 | TAG_SUBNETMASK); |
| 1391 | if (p != NULL) { |
| 1392 | if (gctx->tag.taglen != 4) |
| 1393 | panic("bootpc: subnet mask len is %d", |
| 1394 | gctx->tag.taglen); |
| 1395 | bcopy(p, &ifctx->netmask.sin_addr, 4); |
| 1396 | ifctx->gotnetmask = 1; |
| 1397 | kprintf("subnet mask "); |
| 1398 | print_sin_addr(&ifctx->netmask); |
| 1399 | kprintf(" "); |
| 1400 | } |
| 1401 | |
| 1402 | p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen, |
| 1403 | TAG_ROUTERS); |
| 1404 | if (p != NULL) { |
| 1405 | /* Routers */ |
| 1406 | if (gctx->tag.taglen % 4) |
| 1407 | panic("bootpc: Router Len is %d", gctx->tag.taglen); |
| 1408 | if (gctx->tag.taglen > 0) { |
| 1409 | bcopy(p, &ifctx->gw.sin_addr, 4); |
| 1410 | kprintf("router "); |
| 1411 | print_sin_addr(&ifctx->gw); |
| 1412 | kprintf(" "); |
| 1413 | ifctx->gotgw = 1; |
| 1414 | gctx->gotgw = 1; |
| 1415 | } |
| 1416 | } |
| 1417 | |
| 1418 | p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen, |
| 1419 | TAG_ROOT); |
| 1420 | if (p != NULL) { |
| 1421 | if (gctx->setrootfs != NULL) { |
| 1422 | kprintf("rootfs %s (ignored) ", p); |
| 1423 | } else if (setfs(&nd->root_saddr, |
| 1424 | nd->root_hostnam, p)) { |
| 1425 | kprintf("rootfs %s ",p); |
| 1426 | gctx->gotrootpath = 1; |
| 1427 | ifctx->gotrootpath = 1; |
| 1428 | gctx->setrootfs = ifctx; |
| 1429 | |
| 1430 | p = bootpc_tag(&gctx->tag, &ifctx->reply, |
| 1431 | ifctx->replylen, |
| 1432 | TAG_ROOTOPTS); |
| 1433 | if (p != NULL) { |
| 1434 | nfs_mountopts(&nd->root_args, p); |
| 1435 | kprintf("rootopts %s ", p); |
| 1436 | } |
| 1437 | } else |
| 1438 | panic("Failed to set rootfs to %s",p); |
| 1439 | } |
| 1440 | |
| 1441 | p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen, |
| 1442 | TAG_SWAP); |
| 1443 | if (p != NULL) { |
| 1444 | if (gctx->setswapfs != NULL) { |
| 1445 | kprintf("swapfs %s (ignored) ", p); |
| 1446 | } else if (setfs(&nd->swap_saddr, |
| 1447 | nd->swap_hostnam, p)) { |
| 1448 | gctx->gotswappath = 1; |
| 1449 | gctx->setswapfs = ifctx; |
| 1450 | kprintf("swapfs %s ", p); |
| 1451 | |
| 1452 | p = bootpc_tag(&gctx->tag, &ifctx->reply, |
| 1453 | ifctx->replylen, |
| 1454 | TAG_SWAPOPTS); |
| 1455 | if (p != NULL) { |
| 1456 | /* swap mount options */ |
| 1457 | nfs_mountopts(&nd->swap_args, p); |
| 1458 | kprintf("swapopts %s ", p); |
| 1459 | } |
| 1460 | |
| 1461 | p = bootpc_tag(&gctx->tag, &ifctx->reply, |
| 1462 | ifctx->replylen, |
| 1463 | TAG_SWAPSIZE); |
| 1464 | if (p != NULL) { |
| 1465 | int swaplen; |
| 1466 | if (gctx->tag.taglen != 4) |
| 1467 | panic("bootpc: " |
| 1468 | "Expected 4 bytes for swaplen, " |
| 1469 | "not %d bytes", |
| 1470 | gctx->tag.taglen); |
| 1471 | bcopy(p, &swaplen, 4); |
| 1472 | nd->swap_nblks = ntohl(swaplen); |
| 1473 | kprintf("swapsize %d KB ", |
| 1474 | nd->swap_nblks); |
| 1475 | } |
| 1476 | } else |
| 1477 | panic("Failed to set swapfs to %s", p); |
| 1478 | } |
| 1479 | |
| 1480 | p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen, |
| 1481 | TAG_HOSTNAME); |
| 1482 | if (p != NULL) { |
| 1483 | if (gctx->tag.taglen >= MAXHOSTNAMELEN) |
| 1484 | panic("bootpc: hostname >= %d bytes", |
| 1485 | MAXHOSTNAMELEN); |
| 1486 | if (gctx->sethostname != NULL) { |
| 1487 | kprintf("hostname %s (ignored) ", p); |
| 1488 | } else { |
| 1489 | strcpy(nd->my_hostnam, p); |
| 1490 | strcpy(hostname, p); |
| 1491 | kprintf("hostname %s ",hostname); |
| 1492 | gctx->sethostname = ifctx; |
| 1493 | } |
| 1494 | } |
| 1495 | p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen, |
| 1496 | TAG_COOKIE); |
| 1497 | if (p != NULL) { /* store in a sysctl variable */ |
| 1498 | int i, l = sizeof(bootp_cookie) - 1; |
| 1499 | for (i = 0; i < l && p[i] != '\0'; i++) |
| 1500 | bootp_cookie[i] = p[i]; |
| 1501 | p[i] = '\0'; |
| 1502 | } |
| 1503 | |
| 1504 | kprintf("\n"); |
| 1505 | |
| 1506 | if (ifctx->gotnetmask == 0) { |
| 1507 | if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr))) |
| 1508 | ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET); |
| 1509 | else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr))) |
| 1510 | ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET); |
| 1511 | else |
| 1512 | ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET); |
| 1513 | } |
| 1514 | if (ifctx->gotgw == 0) { |
| 1515 | /* Use proxyarp */ |
| 1516 | ifctx->gw.sin_addr.s_addr = ifctx->myaddr.sin_addr.s_addr; |
| 1517 | } |
| 1518 | } |
| 1519 | |
| 1520 | void |
| 1521 | bootpc_init(void) |
| 1522 | { |
| 1523 | struct bootpc_ifcontext *ifctx, *nctx; /* Interface BOOTP contexts */ |
| 1524 | struct bootpc_globalcontext *gctx; /* Global BOOTP context */ |
| 1525 | struct ifnet *ifp; |
| 1526 | int error; |
| 1527 | struct nfsv3_diskless *nd; |
| 1528 | struct thread *td; |
| 1529 | |
| 1530 | nd = &nfsv3_diskless; |
| 1531 | td = curthread; |
| 1532 | |
| 1533 | /* |
| 1534 | * If already filled in, don't touch it here |
| 1535 | */ |
| 1536 | if (nfs_diskless_valid != 0) |
| 1537 | return; |
| 1538 | |
| 1539 | /* |
| 1540 | * Wait until arp entries can be handled. |
| 1541 | */ |
| 1542 | while (time_second == 0) |
| 1543 | tsleep(&time_second, 0, "arpkludge", 10); |
| 1544 | |
| 1545 | gctx = kmalloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO); |
| 1546 | |
| 1547 | gctx->xid = ~0xFFFF; |
| 1548 | gctx->starttime = time_second; |
| 1549 | |
| 1550 | ifctx = allocifctx(gctx); |
| 1551 | |
| 1552 | /* |
| 1553 | * Find a network interface. |
| 1554 | */ |
| 1555 | #ifdef BOOTP_WIRED_TO |
| 1556 | kprintf("bootpc_init: wired to interface '%s'\n", |
| 1557 | __XSTRING(BOOTP_WIRED_TO)); |
| 1558 | #endif |
| 1559 | bzero(&ifctx->ireq, sizeof(ifctx->ireq)); |
| 1560 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 1561 | strlcpy(ifctx->ireq.ifr_name, ifp->if_xname, |
| 1562 | sizeof(ifctx->ireq.ifr_name)); |
| 1563 | #ifdef BOOTP_WIRED_TO |
| 1564 | if (strcmp(ifctx->ireq.ifr_name, |
| 1565 | __XSTRING(BOOTP_WIRED_TO)) != 0) |
| 1566 | continue; |
| 1567 | #else |
| 1568 | if ((ifp->if_flags & |
| 1569 | (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) != |
| 1570 | IFF_BROADCAST) |
| 1571 | continue; |
| 1572 | #endif |
| 1573 | if (gctx->interfaces != NULL) |
| 1574 | gctx->lastinterface->next = ifctx; |
| 1575 | else |
| 1576 | gctx->interfaces = ifctx; |
| 1577 | ifctx->ifp = ifp; |
| 1578 | gctx->lastinterface = ifctx; |
| 1579 | ifctx = allocifctx(gctx); |
| 1580 | } |
| 1581 | kfree(ifctx, M_TEMP); |
| 1582 | |
| 1583 | if (gctx->interfaces == NULL) { |
| 1584 | #ifdef BOOTP_WIRED_TO |
| 1585 | panic("bootpc_init: Could not find interface specified " |
| 1586 | "by BOOTP_WIRED_TO: " |
| 1587 | __XSTRING(BOOTP_WIRED_TO)); |
| 1588 | #else |
| 1589 | panic("bootpc_init: no suitable interface"); |
| 1590 | #endif |
| 1591 | } |
| 1592 | |
| 1593 | gctx->gotrootpath = 0; |
| 1594 | gctx->gotswappath = 0; |
| 1595 | gctx->gotgw = 0; |
| 1596 | |
| 1597 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) |
| 1598 | bootpc_fakeup_interface(ifctx, gctx, td); |
| 1599 | |
| 1600 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) |
| 1601 | bootpc_compose_query(ifctx, gctx, td); |
| 1602 | |
| 1603 | ifctx = gctx->interfaces; |
| 1604 | error = bootpc_call(gctx, td); |
| 1605 | |
| 1606 | if (error != 0) { |
| 1607 | #ifdef BOOTP_NFSROOT |
| 1608 | panic("BOOTP call failed"); |
| 1609 | #else |
| 1610 | kprintf("BOOTP call failed\n"); |
| 1611 | #endif |
| 1612 | } |
| 1613 | |
| 1614 | nfs_mountopts(&nd->root_args, NULL); |
| 1615 | |
| 1616 | nfs_mountopts(&nd->swap_args, NULL); |
| 1617 | |
| 1618 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) |
| 1619 | if (bootpc_ifctx_isresolved(ifctx) != 0) |
| 1620 | bootpc_decode_reply(nd, ifctx, gctx); |
| 1621 | |
| 1622 | if (gctx->gotswappath == 0) |
| 1623 | nd->swap_nblks = 0; |
| 1624 | #ifdef BOOTP_NFSROOT |
| 1625 | if (gctx->gotrootpath == 0) |
| 1626 | panic("bootpc: No root path offered"); |
| 1627 | #endif |
| 1628 | |
| 1629 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) { |
| 1630 | bootpc_adjust_interface(ifctx, gctx, td); |
| 1631 | |
| 1632 | soclose(ifctx->so, FNONBLOCK); |
| 1633 | } |
| 1634 | |
| 1635 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) |
| 1636 | if (ifctx->gotrootpath != 0) |
| 1637 | break; |
| 1638 | if (ifctx == NULL) { |
| 1639 | for (ifctx = gctx->interfaces; |
| 1640 | ifctx != NULL; |
| 1641 | ifctx = ifctx->next) |
| 1642 | if (bootpc_ifctx_isresolved(ifctx) != 0) |
| 1643 | break; |
| 1644 | } |
| 1645 | if (ifctx == NULL) |
| 1646 | goto out; |
| 1647 | |
| 1648 | if (gctx->gotrootpath != 0) { |
| 1649 | |
| 1650 | error = md_mount(&nd->root_saddr, nd->root_hostnam, |
| 1651 | nd->root_fh, &nd->root_fhsize, |
| 1652 | &nd->root_args, td); |
| 1653 | if (error != 0) |
| 1654 | panic("nfs_boot: mountd root, error=%d", error); |
| 1655 | |
| 1656 | if (gctx->gotswappath != 0) { |
| 1657 | |
| 1658 | error = md_mount(&nd->swap_saddr, |
| 1659 | nd->swap_hostnam, |
| 1660 | nd->swap_fh, &nd->swap_fhsize, |
| 1661 | &nd->swap_args, td); |
| 1662 | if (error != 0) |
| 1663 | panic("nfs_boot: mountd swap, error=%d", |
| 1664 | error); |
| 1665 | |
| 1666 | error = md_lookup_swap(&nd->swap_saddr, |
| 1667 | gctx->lookup_path, |
| 1668 | nd->swap_fh, &nd->swap_fhsize, |
| 1669 | &nd->swap_args, td); |
| 1670 | if (error != 0) |
| 1671 | panic("nfs_boot: lookup swap, error=%d", |
| 1672 | error); |
| 1673 | } |
| 1674 | nfs_diskless_valid = 3; |
| 1675 | } |
| 1676 | |
| 1677 | strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name); |
| 1678 | bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr)); |
| 1679 | bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr)); |
| 1680 | ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = |
| 1681 | ifctx->myaddr.sin_addr.s_addr | |
| 1682 | ~ ifctx->netmask.sin_addr.s_addr; |
| 1683 | bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask)); |
| 1684 | |
| 1685 | out: |
| 1686 | for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = nctx) { |
| 1687 | nctx = ifctx->next; |
| 1688 | kfree(ifctx, M_TEMP); |
| 1689 | } |
| 1690 | kfree(gctx, M_TEMP); |
| 1691 | } |
| 1692 | |