347 printf(" %s\n", rt->rt_ifp->if_xname);
348}
349
350void
351bootpboot_p_tree(struct radix_node *rn)
352{
353
354 while (rn != NULL) {
355 if (rn->rn_bit < 0) {
356 if ((rn->rn_flags & RNF_ROOT) != 0) {
357 } else {
358 bootpboot_p_rtentry((struct rtentry *) rn);
359 }
360 rn = rn->rn_dupedkey;
361 } else {
362 bootpboot_p_tree(rn->rn_left);
363 bootpboot_p_tree(rn->rn_right);
364 return;
365 }
366 }
367}
368
369void
370bootpboot_p_rtlist(void)
371{
372 struct radix_node_head *rnh;
373
374 printf("Routing table:\n");
375 rnh = rt_tables_get_rnh(0, AF_INET);
376 if (rnh == NULL)
377 return;
378 RADIX_NODE_HEAD_RLOCK(rnh); /* could sleep XXX */
379 bootpboot_p_tree(rnh->rnh_treetop);
380 RADIX_NODE_HEAD_RUNLOCK(rnh);
381}
382
383void
384bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
385{
386
387 printf("%s flags %x, addr ",
388 ifp->if_xname, ifp->if_flags);
389 print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
390 printf(", broadcast ");
391 print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
392 printf(", netmask ");
393 print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
394 printf("\n");
395}
396
397void
398bootpboot_p_iflist(void)
399{
400 struct ifnet *ifp;
401 struct ifaddr *ifa;
402
403 printf("Interface list:\n");
404 IFNET_RLOCK();
405 for (ifp = TAILQ_FIRST(&V_ifnet);
406 ifp != NULL;
407 ifp = TAILQ_NEXT(ifp, if_link)) {
408 for (ifa = TAILQ_FIRST(&ifp->if_addrhead);
409 ifa != NULL;
410 ifa = TAILQ_NEXT(ifa, ifa_link))
411 if (ifa->ifa_addr->sa_family == AF_INET)
412 bootpboot_p_if(ifp, ifa);
413 }
414 IFNET_RUNLOCK();
415}
416#endif /* defined(BOOTP_DEBUG) */
417
418static void
419clear_sinaddr(struct sockaddr_in *sin)
420{
421
422 bzero(sin, sizeof(*sin));
423 sin->sin_len = sizeof(*sin);
424 sin->sin_family = AF_INET;
425 sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
426 sin->sin_port = 0;
427}
428
429static void
430allocifctx(struct bootpc_globalcontext *gctx)
431{
432 struct bootpc_ifcontext *ifctx;
433
434 ifctx = malloc(sizeof(*ifctx), M_TEMP, M_WAITOK | M_ZERO);
435 ifctx->xid = gctx->xid;
436#ifdef BOOTP_NO_DHCP
437 ifctx->state = IF_BOOTP_UNRESOLVED;
438#else
439 ifctx->state = IF_DHCP_UNRESOLVED;
440#endif
441 gctx->xid += 0x100;
442 STAILQ_INSERT_TAIL(&gctx->interfaces, ifctx, next);
443}
444
445static __inline int
446bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
447{
448
449 if (ifctx->state == IF_BOOTP_RESOLVED ||
450 ifctx->state == IF_DHCP_RESOLVED)
451 return 1;
452 return 0;
453}
454
455static __inline int
456bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
457{
458
459 if (ifctx->state == IF_BOOTP_UNRESOLVED ||
460 ifctx->state == IF_DHCP_UNRESOLVED)
461 return 1;
462 return 0;
463}
464
465static __inline int
466bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
467{
468
469 if (ifctx->state == IF_BOOTP_FAILED ||
470 ifctx->state == IF_DHCP_FAILED)
471 return 1;
472 return 0;
473}
474
475static int
476bootpc_received(struct bootpc_globalcontext *gctx,
477 struct bootpc_ifcontext *ifctx)
478{
479 unsigned char dhcpreplytype;
480 char *p;
481
482 /*
483 * Need timeout for fallback to less
484 * desirable alternative.
485 */
486
487 /* This call used for the side effect (badopt flag) */
488 (void) bootpc_tag(&gctx->tmptag, &gctx->reply,
489 gctx->replylen,
490 TAG_END);
491
492 /* If packet is invalid, ignore it */
493 if (gctx->tmptag.badopt != 0)
494 return 0;
495
496 p = bootpc_tag(&gctx->tmptag, &gctx->reply,
497 gctx->replylen, TAG_DHCP_MSGTYPE);
498 if (p != NULL)
499 dhcpreplytype = *p;
500 else
501 dhcpreplytype = DHCP_NOMSG;
502
503 switch (ifctx->dhcpquerytype) {
504 case DHCP_DISCOVER:
505 if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
506#ifndef BOOTP_FORCE_DHCP
507 && dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
508#endif
509 )
510 return 0;
511 break;
512 case DHCP_REQUEST:
513 if (dhcpreplytype != DHCP_ACK)
514 return 0;
515 case DHCP_NOMSG:
516 break;
517 }
518
519 /* Ignore packet unless it gives us a root tag we didn't have */
520
521 if ((ifctx->state == IF_BOOTP_RESOLVED ||
522 (ifctx->dhcpquerytype == DHCP_DISCOVER &&
523 (ifctx->state == IF_DHCP_OFFERED ||
524 ifctx->state == IF_DHCP_RESOLVED))) &&
525 (bootpc_tag(&gctx->tmptag, &ifctx->reply,
526 ifctx->replylen,
527 TAG_ROOT) != NULL ||
528 bootpc_tag(&gctx->tmptag, &gctx->reply,
529 gctx->replylen,
530 TAG_ROOT) == NULL))
531 return 0;
532
533 bcopy(&gctx->reply, &ifctx->reply, gctx->replylen);
534 ifctx->replylen = gctx->replylen;
535
536 /* XXX: Only reset if 'perfect' response */
537 if (ifctx->state == IF_BOOTP_UNRESOLVED)
538 ifctx->state = IF_BOOTP_RESOLVED;
539 else if (ifctx->state == IF_DHCP_UNRESOLVED &&
540 ifctx->dhcpquerytype == DHCP_DISCOVER) {
541 if (dhcpreplytype == DHCP_OFFER)
542 ifctx->state = IF_DHCP_OFFERED;
543 else
544 ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */
545 } else if (ifctx->state == IF_DHCP_OFFERED &&
546 ifctx->dhcpquerytype == DHCP_REQUEST)
547 ifctx->state = IF_DHCP_RESOLVED;
548
549
550 if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
551 ifctx->state != IF_BOOTP_RESOLVED) {
552 p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
553 ifctx->replylen, TAG_DHCP_SERVERID);
554 if (p != NULL && gctx->tmptag.taglen == 4) {
555 memcpy(&ifctx->dhcpserver, p, 4);
556 ifctx->gotdhcpserver = 1;
557 } else
558 ifctx->gotdhcpserver = 0;
559 return 1;
560 }
561
562 ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
563 ifctx->replylen,
564 TAG_ROOT) != NULL);
565 ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
566 ifctx->replylen,
567 TAG_ROUTERS) != NULL);
568 ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
569 ifctx->replylen,
570 TAG_SUBNETMASK) != NULL);
571 return 1;
572}
573
574static int
575bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
576{
577 struct sockaddr_in *sin, dst;
578 struct uio auio;
579 struct sockopt sopt;
580 struct iovec aio;
581 int error, on, rcvflg, timo, len;
582 time_t atimo;
583 time_t rtimo;
584 struct timeval tv;
585 struct bootpc_ifcontext *ifctx;
586 int outstanding;
587 int gotrootpath;
588 int retry;
589 const char *s;
590
591 tv.tv_sec = 1;
592 tv.tv_usec = 0;
593 bzero(&sopt, sizeof(sopt));
594 sopt.sopt_dir = SOPT_SET;
595 sopt.sopt_level = SOL_SOCKET;
596 sopt.sopt_name = SO_RCVTIMEO;
597 sopt.sopt_val = &tv;
598 sopt.sopt_valsize = sizeof tv;
599
600 error = sosetopt(bootp_so, &sopt);
601 if (error != 0)
602 goto out;
603
604 /*
605 * Enable broadcast.
606 */
607 on = 1;
608 sopt.sopt_name = SO_BROADCAST;
609 sopt.sopt_val = &on;
610 sopt.sopt_valsize = sizeof on;
611
612 error = sosetopt(bootp_so, &sopt);
613 if (error != 0)
614 goto out;
615
616 /*
617 * Disable routing.
618 */
619
620 on = 1;
621 sopt.sopt_name = SO_DONTROUTE;
622 sopt.sopt_val = &on;
623 sopt.sopt_valsize = sizeof on;
624
625 error = sosetopt(bootp_so, &sopt);
626 if (error != 0)
627 goto out;
628
629 /*
630 * Bind the local endpoint to a bootp client port.
631 */
632 sin = &dst;
633 clear_sinaddr(sin);
634 sin->sin_port = htons(IPPORT_BOOTPC);
635 error = sobind(bootp_so, (struct sockaddr *)sin, td);
636 if (error != 0) {
637 printf("bind failed\n");
638 goto out;
639 }
640
641 /*
642 * Setup socket address for the server.
643 */
644 sin = &dst;
645 clear_sinaddr(sin);
646 sin->sin_addr.s_addr = INADDR_BROADCAST;
647 sin->sin_port = htons(IPPORT_BOOTPS);
648
649 /*
650 * Send it, repeatedly, until a reply is received,
651 * but delay each re-send by an increasing amount.
652 * If the delay hits the maximum, start complaining.
653 */
654 timo = 0;
655 rtimo = 0;
656 for (;;) {
657
658 outstanding = 0;
659 gotrootpath = 0;
660
661 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
662 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
663 bootpc_tag(&gctx->tmptag, &ifctx->reply,
664 ifctx->replylen,
665 TAG_ROOT) != NULL)
666 gotrootpath = 1;
667 }
668
669 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
670 struct in_aliasreq *ifra = &ifctx->iareq;
671 sin = (struct sockaddr_in *)&ifra->ifra_mask;
672
673 ifctx->outstanding = 0;
674 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
675 gotrootpath != 0) {
676 continue;
677 }
678 if (bootpc_ifctx_isfailed(ifctx) != 0)
679 continue;
680
681 outstanding++;
682 ifctx->outstanding = 1;
683
684 /* Proceed to next step in DHCP negotiation */
685 if ((ifctx->state == IF_DHCP_OFFERED &&
686 ifctx->dhcpquerytype != DHCP_REQUEST) ||
687 (ifctx->state == IF_DHCP_UNRESOLVED &&
688 ifctx->dhcpquerytype != DHCP_DISCOVER) ||
689 (ifctx->state == IF_BOOTP_UNRESOLVED &&
690 ifctx->dhcpquerytype != DHCP_NOMSG)) {
691 ifctx->sentmsg = 0;
692 bootpc_compose_query(ifctx, td);
693 }
694
695 /* Send BOOTP request (or re-send). */
696
697 if (ifctx->sentmsg == 0) {
698 switch(ifctx->dhcpquerytype) {
699 case DHCP_DISCOVER:
700 s = "DHCP Discover";
701 break;
702 case DHCP_REQUEST:
703 s = "DHCP Request";
704 break;
705 case DHCP_NOMSG:
706 default:
707 s = "BOOTP Query";
708 break;
709 }
710 printf("Sending %s packet from "
711 "interface %s (%*D)\n",
712 s,
713 ifctx->ireq.ifr_name,
714 ifctx->sdl->sdl_alen,
715 (unsigned char *) LLADDR(ifctx->sdl),
716 ":");
717 ifctx->sentmsg = 1;
718 }
719
720 aio.iov_base = (caddr_t) &ifctx->call;
721 aio.iov_len = sizeof(ifctx->call);
722
723 auio.uio_iov = &aio;
724 auio.uio_iovcnt = 1;
725 auio.uio_segflg = UIO_SYSSPACE;
726 auio.uio_rw = UIO_WRITE;
727 auio.uio_offset = 0;
728 auio.uio_resid = sizeof(ifctx->call);
729 auio.uio_td = td;
730
731 /* Set netmask to 0.0.0.0 */
732 clear_sinaddr(sin);
733 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra,
734 td);
735 if (error != 0)
736 panic("%s: SIOCAIFADDR, error=%d", __func__,
737 error);
738
739 error = sosend(bootp_so, (struct sockaddr *) &dst,
740 &auio, NULL, NULL, 0, td);
741 if (error != 0)
742 printf("%s: sosend: %d state %08x\n", __func__,
743 error, (int )bootp_so->so_state);
744
745 /* Set netmask to 255.0.0.0 */
746 sin->sin_addr.s_addr = htonl(IN_CLASSA_NET);
747 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra,
748 td);
749 if (error != 0)
750 panic("%s: SIOCAIFADDR, error=%d", __func__,
751 error);
752 }
753
754 if (outstanding == 0 &&
755 (rtimo == 0 || time_second >= rtimo)) {
756 error = 0;
757 goto out;
758 }
759
760 /* Determine new timeout. */
761 if (timo < MAX_RESEND_DELAY)
762 timo++;
763 else {
764 printf("DHCP/BOOTP timeout for server ");
765 print_sin_addr(&dst);
766 printf("\n");
767 }
768
769 /*
770 * Wait for up to timo seconds for a reply.
771 * The socket receive timeout was set to 1 second.
772 */
773 atimo = timo + time_second;
774 while (time_second < atimo) {
775 aio.iov_base = (caddr_t) &gctx->reply;
776 aio.iov_len = sizeof(gctx->reply);
777
778 auio.uio_iov = &aio;
779 auio.uio_iovcnt = 1;
780 auio.uio_segflg = UIO_SYSSPACE;
781 auio.uio_rw = UIO_READ;
782 auio.uio_offset = 0;
783 auio.uio_resid = sizeof(gctx->reply);
784 auio.uio_td = td;
785
786 rcvflg = 0;
787 error = soreceive(bootp_so, NULL, &auio,
788 NULL, NULL, &rcvflg);
789 gctx->secs = time_second - gctx->starttime;
790 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
791 if (bootpc_ifctx_isresolved(ifctx) != 0 ||
792 bootpc_ifctx_isfailed(ifctx) != 0)
793 continue;
794
795 ifctx->call.secs = htons(gctx->secs);
796 }
797 if (error == EWOULDBLOCK)
798 continue;
799 if (error != 0)
800 goto out;
801 len = sizeof(gctx->reply) - auio.uio_resid;
802
803 /* Do we have the required number of bytes ? */
804 if (len < BOOTP_MIN_LEN)
805 continue;
806 gctx->replylen = len;
807
808 /* Is it a reply? */
809 if (gctx->reply.op != BOOTP_REPLY)
810 continue;
811
812 /* Is this an answer to our query */
813 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
814 if (gctx->reply.xid != ifctx->call.xid)
815 continue;
816
817 /* Same HW address size ? */
818 if (gctx->reply.hlen != ifctx->call.hlen)
819 continue;
820
821 /* Correct HW address ? */
822 if (bcmp(gctx->reply.chaddr,
823 ifctx->call.chaddr,
824 ifctx->call.hlen) != 0)
825 continue;
826
827 break;
828 }
829
830 if (ifctx != NULL) {
831 s = bootpc_tag(&gctx->tmptag,
832 &gctx->reply,
833 gctx->replylen,
834 TAG_DHCP_MSGTYPE);
835 if (s != NULL) {
836 switch (*s) {
837 case DHCP_OFFER:
838 s = "DHCP Offer";
839 break;
840 case DHCP_ACK:
841 s = "DHCP Ack";
842 break;
843 default:
844 s = "DHCP (unexpected)";
845 break;
846 }
847 } else
848 s = "BOOTP Reply";
849
850 printf("Received %s packet"
851 " on %s from ",
852 s,
853 ifctx->ireq.ifr_name);
854 print_in_addr(gctx->reply.siaddr);
855 if (gctx->reply.giaddr.s_addr !=
856 htonl(INADDR_ANY)) {
857 printf(" via ");
858 print_in_addr(gctx->reply.giaddr);
859 }
860 if (bootpc_received(gctx, ifctx) != 0) {
861 printf(" (accepted)");
862 if (ifctx->outstanding) {
863 ifctx->outstanding = 0;
864 outstanding--;
865 }
866 /* Network settle delay */
867 if (outstanding == 0)
868 atimo = time_second +
869 BOOTP_SETTLE_DELAY;
870 } else
871 printf(" (ignored)");
872 if (ifctx->gotrootpath ||
873 gctx->any_root_overrides) {
874 gotrootpath = 1;
875 rtimo = time_second +
876 BOOTP_SETTLE_DELAY;
877 if (ifctx->gotrootpath)
878 printf(" (got root path)");
879 }
880 printf("\n");
881 }
882 } /* while secs */
883#ifdef BOOTP_TIMEOUT
884 if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
885 break;
886#endif
887 /* Force a retry if halfway in DHCP negotiation */
888 retry = 0;
889 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
890 if (ifctx->state == IF_DHCP_OFFERED) {
891 if (ifctx->dhcpquerytype == DHCP_DISCOVER)
892 retry = 1;
893 else
894 ifctx->state = IF_DHCP_UNRESOLVED;
895 }
896
897 if (retry != 0)
898 continue;
899
900 if (gotrootpath != 0) {
901 gctx->gotrootpath = gotrootpath;
902 if (rtimo != 0 && time_second >= rtimo)
903 break;
904 }
905 } /* forever send/receive */
906
907 /*
908 * XXX: These are errors of varying seriousness being silently
909 * ignored
910 */
911
912 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
913 if (bootpc_ifctx_isresolved(ifctx) == 0) {
914 printf("%s timeout for interface %s\n",
915 ifctx->dhcpquerytype != DHCP_NOMSG ?
916 "DHCP" : "BOOTP",
917 ifctx->ireq.ifr_name);
918 }
919
920 if (gctx->gotrootpath != 0) {
921#if 0
922 printf("Got a root path, ignoring remaining timeout\n");
923#endif
924 error = 0;
925 goto out;
926 }
927#ifndef BOOTP_NFSROOT
928 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
929 if (bootpc_ifctx_isresolved(ifctx) != 0) {
930 error = 0;
931 goto out;
932 }
933#endif
934 error = ETIMEDOUT;
935
936out:
937 return (error);
938}
939
940static void
941bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx, struct thread *td)
942{
943 struct ifreq *ifr;
944 struct in_aliasreq *ifra;
945 struct sockaddr_in *sin;
946 int error;
947
948 ifr = &ifctx->ireq;
949 ifra = &ifctx->iareq;
950
951 /*
952 * Bring up the interface.
953 *
954 * Get the old interface flags and or IFF_UP into them; if
955 * IFF_UP set blindly, interface selection can be clobbered.
956 */
957 error = ifioctl(bootp_so, SIOCGIFFLAGS, (caddr_t)ifr, td);
958 if (error != 0)
959 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
960 ifr->ifr_flags |= IFF_UP;
961 error = ifioctl(bootp_so, SIOCSIFFLAGS, (caddr_t)ifr, td);
962 if (error != 0)
963 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
964
965 /*
966 * Do enough of ifconfig(8) so that the chosen interface
967 * can talk to the servers. Set address to 0.0.0.0/8 and
968 * broadcast address to local broadcast.
969 */
970 sin = (struct sockaddr_in *)&ifra->ifra_addr;
971 clear_sinaddr(sin);
972 sin = (struct sockaddr_in *)&ifra->ifra_mask;
973 clear_sinaddr(sin);
974 sin->sin_addr.s_addr = htonl(IN_CLASSA_NET);
975 sin = (struct sockaddr_in *)&ifra->ifra_broadaddr;
976 clear_sinaddr(sin);
977 sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
978 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra, td);
979 if (error != 0)
980 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
981}
982
983static void
984bootpc_shutdown_interface(struct bootpc_ifcontext *ifctx, struct thread *td)
985{
986 struct ifreq *ifr;
987 struct sockaddr_in *sin;
988 int error;
989
990 ifr = &ifctx->ireq;
991
992 printf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
993 error = ifioctl(bootp_so, SIOCGIFFLAGS, (caddr_t)ifr, td);
994 if (error != 0)
995 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
996 ifr->ifr_flags &= ~IFF_UP;
997 error = ifioctl(bootp_so, SIOCSIFFLAGS, (caddr_t)ifr, td);
998 if (error != 0)
999 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
1000
1001 sin = (struct sockaddr_in *) &ifr->ifr_addr;
1002 clear_sinaddr(sin);
1003 error = ifioctl(bootp_so, SIOCDIFADDR, (caddr_t) ifr, td);
1004 if (error != 0)
1005 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
1006}
1007
1008static int
1009bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
1010 struct bootpc_globalcontext *gctx, struct thread *td)
1011{
1012 int error;
1013 struct sockaddr_in defdst;
1014 struct sockaddr_in defmask;
1015 struct sockaddr_in *sin;
1016 struct ifreq *ifr;
1017 struct in_aliasreq *ifra;
1018 struct sockaddr_in *myaddr;
1019 struct sockaddr_in *netmask;
1020 struct sockaddr_in *gw;
1021
1022 ifr = &ifctx->ireq;
1023 ifra = &ifctx->iareq;
1024 myaddr = &ifctx->myaddr;
1025 netmask = &ifctx->netmask;
1026 gw = &ifctx->gw;
1027
1028 if (bootpc_ifctx_isresolved(ifctx) == 0) {
1029 /* Shutdown interfaces where BOOTP failed */
1030 bootpc_shutdown_interface(ifctx, td);
1031 return (0);
1032 }
1033
1034 printf("Adjusted interface %s\n", ifctx->ireq.ifr_name);
1035 /*
1036 * Do enough of ifconfig(8) so that the chosen interface
1037 * can talk to the servers. (just set the address)
1038 */
1039 sin = (struct sockaddr_in *) &ifr->ifr_addr;
1040 clear_sinaddr(sin);
1041 error = ifioctl(bootp_so, SIOCDIFADDR, (caddr_t) ifr, td);
1042 if (error != 0)
1043 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
1044
1045 bcopy(myaddr, &ifra->ifra_addr, sizeof(*myaddr));
1046 bcopy(netmask, &ifra->ifra_mask, sizeof(*netmask));
1047 clear_sinaddr(&ifra->ifra_broadaddr);
1048 ifra->ifra_broadaddr.sin_addr.s_addr = myaddr->sin_addr.s_addr |
1049 ~netmask->sin_addr.s_addr;
1050
1051 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra, td);
1052 if (error != 0)
1053 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
1054
1055 /* Add new default route */
1056
1057 if (ifctx->gotgw != 0 || gctx->gotgw == 0) {
1058 clear_sinaddr(&defdst);
1059 clear_sinaddr(&defmask);
1060 /* XXX MRT just table 0 */
1061 error = rtrequest_fib(RTM_ADD,
1062 (struct sockaddr *) &defdst, (struct sockaddr *) gw,
1063 (struct sockaddr *) &defmask,
1064 (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL, RT_DEFAULT_FIB);
1065 if (error != 0) {
1066 printf("%s: RTM_ADD, error=%d\n", __func__, error);
1067 return (error);
1068 }
1069 }
1070
1071 return (0);
1072}
1073
1074static int
1075setfs(struct sockaddr_in *addr, char *path, char *p,
1076 const struct in_addr *siaddr)
1077{
1078
1079 if (getip(&p, &addr->sin_addr) == 0) {
1080 if (siaddr != NULL && *p == '/')
1081 bcopy(siaddr, &addr->sin_addr, sizeof(struct in_addr));
1082 else
1083 return 0;
1084 } else {
1085 if (*p != ':')
1086 return 0;
1087 p++;
1088 }
1089
1090 addr->sin_len = sizeof(struct sockaddr_in);
1091 addr->sin_family = AF_INET;
1092
1093 strlcpy(path, p, MNAMELEN);
1094 return 1;
1095}
1096
1097static int
1098getip(char **ptr, struct in_addr *addr)
1099{
1100 char *p;
1101 unsigned int ip;
1102 int val;
1103
1104 p = *ptr;
1105 ip = 0;
1106 if (((val = getdec(&p)) < 0) || (val > 255))
1107 return 0;
1108 ip = val << 24;
1109 if (*p != '.')
1110 return 0;
1111 p++;
1112 if (((val = getdec(&p)) < 0) || (val > 255))
1113 return 0;
1114 ip |= (val << 16);
1115 if (*p != '.')
1116 return 0;
1117 p++;
1118 if (((val = getdec(&p)) < 0) || (val > 255))
1119 return 0;
1120 ip |= (val << 8);
1121 if (*p != '.')
1122 return 0;
1123 p++;
1124 if (((val = getdec(&p)) < 0) || (val > 255))
1125 return 0;
1126 ip |= val;
1127
1128 addr->s_addr = htonl(ip);
1129 *ptr = p;
1130 return 1;
1131}
1132
1133static int
1134getdec(char **ptr)
1135{
1136 char *p;
1137 int ret;
1138
1139 p = *ptr;
1140 ret = 0;
1141 if ((*p < '0') || (*p > '9'))
1142 return -1;
1143 while ((*p >= '0') && (*p <= '9')) {
1144 ret = ret * 10 + (*p - '0');
1145 p++;
1146 }
1147 *ptr = p;
1148 return ret;
1149}
1150
1151static void
1152mountopts(struct nfs_args *args, char *p)
1153{
1154 args->version = NFS_ARGSVERSION;
1155 args->rsize = BOOTP_BLOCKSIZE;
1156 args->wsize = BOOTP_BLOCKSIZE;
1157 args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
1158 args->sotype = SOCK_DGRAM;
1159 if (p != NULL)
1160 nfs_parse_options(p, args);
1161}
1162
1163static int
1164xdr_opaque_decode(struct mbuf **mptr, u_char *buf, int len)
1165{
1166 struct mbuf *m;
1167 int alignedlen;
1168
1169 m = *mptr;
1170 alignedlen = ( len + 3 ) & ~3;
1171
1172 if (m->m_len < alignedlen) {
1173 m = m_pullup(m, alignedlen);
1174 if (m == NULL) {
1175 *mptr = NULL;
1176 return EBADRPC;
1177 }
1178 }
1179 bcopy(mtod(m, u_char *), buf, len);
1180 m_adj(m, alignedlen);
1181 *mptr = m;
1182 return 0;
1183}
1184
1185static int
1186xdr_int_decode(struct mbuf **mptr, int *iptr)
1187{
1188 u_int32_t i;
1189
1190 if (xdr_opaque_decode(mptr, (u_char *) &i, sizeof(u_int32_t)) != 0)
1191 return EBADRPC;
1192 *iptr = fxdr_unsigned(u_int32_t, i);
1193 return 0;
1194}
1195
1196static void
1197print_sin_addr(struct sockaddr_in *sin)
1198{
1199
1200 print_in_addr(sin->sin_addr);
1201}
1202
1203static void
1204print_in_addr(struct in_addr addr)
1205{
1206 unsigned int ip;
1207
1208 ip = ntohl(addr.s_addr);
1209 printf("%d.%d.%d.%d",
1210 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1211}
1212
1213static void
1214bootpc_compose_query(struct bootpc_ifcontext *ifctx, struct thread *td)
1215{
1216 unsigned char *vendp;
1217 unsigned char vendor_client[64];
1218 uint32_t leasetime;
1219 uint8_t vendor_client_len;
1220
1221 ifctx->gotrootpath = 0;
1222
1223 bzero((caddr_t) &ifctx->call, sizeof(ifctx->call));
1224
1225 /* bootpc part */
1226 ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */
1227 ifctx->call.htype = 1; /* 10mb ethernet */
1228 ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
1229 ifctx->call.hops = 0;
1230 if (bootpc_ifctx_isunresolved(ifctx) != 0)
1231 ifctx->xid++;
1232 ifctx->call.xid = txdr_unsigned(ifctx->xid);
1233 bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
1234
1235 vendp = ifctx->call.vend;
1236 *vendp++ = 99; /* RFC1048 cookie */
1237 *vendp++ = 130;
1238 *vendp++ = 83;
1239 *vendp++ = 99;
1240 *vendp++ = TAG_MAXMSGSIZE;
1241 *vendp++ = 2;
1242 *vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
1243 *vendp++ = sizeof(struct bootp_packet) & 255;
1244
1245 snprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
1246 ostype, MACHINE, osrelease);
1247 vendor_client_len = strlen(vendor_client);
1248 *vendp++ = TAG_VENDOR_INDENTIFIER;
1249 *vendp++ = vendor_client_len;
1250 memcpy(vendp, vendor_client, vendor_client_len);
1251 vendp += vendor_client_len;
1252 ifctx->dhcpquerytype = DHCP_NOMSG;
1253 switch (ifctx->state) {
1254 case IF_DHCP_UNRESOLVED:
1255 *vendp++ = TAG_DHCP_MSGTYPE;
1256 *vendp++ = 1;
1257 *vendp++ = DHCP_DISCOVER;
1258 ifctx->dhcpquerytype = DHCP_DISCOVER;
1259 ifctx->gotdhcpserver = 0;
1260 break;
1261 case IF_DHCP_OFFERED:
1262 *vendp++ = TAG_DHCP_MSGTYPE;
1263 *vendp++ = 1;
1264 *vendp++ = DHCP_REQUEST;
1265 ifctx->dhcpquerytype = DHCP_REQUEST;
1266 *vendp++ = TAG_DHCP_REQ_ADDR;
1267 *vendp++ = 4;
1268 memcpy(vendp, &ifctx->reply.yiaddr, 4);
1269 vendp += 4;
1270 if (ifctx->gotdhcpserver != 0) {
1271 *vendp++ = TAG_DHCP_SERVERID;
1272 *vendp++ = 4;
1273 memcpy(vendp, &ifctx->dhcpserver, 4);
1274 vendp += 4;
1275 }
1276 *vendp++ = TAG_DHCP_LEASETIME;
1277 *vendp++ = 4;
1278 leasetime = htonl(300);
1279 memcpy(vendp, &leasetime, 4);
1280 vendp += 4;
1281 break;
1282 default:
1283 break;
1284 }
1285 *vendp = TAG_END;
1286
1287 ifctx->call.secs = 0;
1288 ifctx->call.flags = htons(0x8000); /* We need a broadcast answer */
1289}
1290
1291static int
1292bootpc_hascookie(struct bootp_packet *bp)
1293{
1294
1295 return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
1296 bp->vend[2] == 83 && bp->vend[3] == 99);
1297}
1298
1299static void
1300bootpc_tag_helper(struct bootpc_tagcontext *tctx,
1301 unsigned char *start, int len, int tag)
1302{
1303 unsigned char *j;
1304 unsigned char *ej;
1305 unsigned char code;
1306
1307 if (tctx->badtag != 0 || tctx->badopt != 0)
1308 return;
1309
1310 j = start;
1311 ej = j + len;
1312
1313 while (j < ej) {
1314 code = *j++;
1315 if (code == TAG_PAD)
1316 continue;
1317 if (code == TAG_END)
1318 return;
1319 if (j >= ej || j + *j + 1 > ej) {
1320 tctx->badopt = 1;
1321 return;
1322 }
1323 len = *j++;
1324 if (code == tag) {
1325 if (tctx->taglen + len > TAG_MAXLEN) {
1326 tctx->badtag = 1;
1327 return;
1328 }
1329 tctx->foundopt = 1;
1330 if (len > 0)
1331 memcpy(tctx->buf + tctx->taglen,
1332 j, len);
1333 tctx->taglen += len;
1334 }
1335 if (code == TAG_OVERLOAD)
1336 tctx->overload = *j;
1337
1338 j += len;
1339 }
1340}
1341
1342static unsigned char *
1343bootpc_tag(struct bootpc_tagcontext *tctx,
1344 struct bootp_packet *bp, int len, int tag)
1345{
1346 tctx->overload = 0;
1347 tctx->badopt = 0;
1348 tctx->badtag = 0;
1349 tctx->foundopt = 0;
1350 tctx->taglen = 0;
1351
1352 if (bootpc_hascookie(bp) == 0)
1353 return NULL;
1354
1355 bootpc_tag_helper(tctx, &bp->vend[4],
1356 (unsigned char *) bp + len - &bp->vend[4], tag);
1357
1358 if ((tctx->overload & OVERLOAD_FILE) != 0)
1359 bootpc_tag_helper(tctx,
1360 (unsigned char *) bp->file,
1361 sizeof(bp->file),
1362 tag);
1363 if ((tctx->overload & OVERLOAD_SNAME) != 0)
1364 bootpc_tag_helper(tctx,
1365 (unsigned char *) bp->sname,
1366 sizeof(bp->sname),
1367 tag);
1368
1369 if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
1370 return NULL;
1371 tctx->buf[tctx->taglen] = '\0';
1372 return tctx->buf;
1373}
1374
1375static void
1376bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
1377 struct bootpc_globalcontext *gctx)
1378{
1379 char *p, *s;
1380 unsigned int ip;
1381
1382 ifctx->gotgw = 0;
1383 ifctx->gotnetmask = 0;
1384
1385 clear_sinaddr(&ifctx->myaddr);
1386 clear_sinaddr(&ifctx->netmask);
1387 clear_sinaddr(&ifctx->gw);
1388
1389 ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
1390
1391 ip = ntohl(ifctx->myaddr.sin_addr.s_addr);
1392
1393 printf("%s at ", ifctx->ireq.ifr_name);
1394 print_sin_addr(&ifctx->myaddr);
1395 printf(" server ");
1396 print_in_addr(ifctx->reply.siaddr);
1397
1398 ifctx->gw.sin_addr = ifctx->reply.giaddr;
1399 if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
1400 printf(" via gateway ");
1401 print_in_addr(ifctx->reply.giaddr);
1402 }
1403
1404 /* This call used for the side effect (overload flag) */
1405 (void) bootpc_tag(&gctx->tmptag,
1406 &ifctx->reply, ifctx->replylen, TAG_END);
1407
1408 if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
1409 if (ifctx->reply.sname[0] != '\0')
1410 printf(" server name %s", ifctx->reply.sname);
1411 if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
1412 if (ifctx->reply.file[0] != '\0')
1413 printf(" boot file %s", ifctx->reply.file);
1414
1415 printf("\n");
1416
1417 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1418 TAG_SUBNETMASK);
1419 if (p != NULL) {
1420 if (gctx->tag.taglen != 4)
1421 panic("bootpc: subnet mask len is %d",
1422 gctx->tag.taglen);
1423 bcopy(p, &ifctx->netmask.sin_addr, 4);
1424 ifctx->gotnetmask = 1;
1425 printf("subnet mask ");
1426 print_sin_addr(&ifctx->netmask);
1427 printf(" ");
1428 }
1429
1430 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1431 TAG_ROUTERS);
1432 if (p != NULL) {
1433 /* Routers */
1434 if (gctx->tag.taglen % 4)
1435 panic("bootpc: Router Len is %d", gctx->tag.taglen);
1436 if (gctx->tag.taglen > 0) {
1437 bcopy(p, &ifctx->gw.sin_addr, 4);
1438 printf("router ");
1439 print_sin_addr(&ifctx->gw);
1440 printf(" ");
1441 ifctx->gotgw = 1;
1442 gctx->gotgw = 1;
1443 }
1444 }
1445
1446 /*
1447 * Choose a root filesystem. If a value is forced in the environment
1448 * and it contains "nfs:", use it unconditionally. Otherwise, if the
1449 * kernel is compiled with the ROOTDEVNAME option, then use it if:
1450 * - The server doesn't provide a pathname.
1451 * - The boothowto flags include RB_DFLTROOT (user said to override
1452 * the server value).
1453 */
1454 p = NULL;
1455 if ((s = getenv("vfs.root.mountfrom")) != NULL) {
1456 if ((p = strstr(s, "nfs:")) != NULL)
1457 p = strdup(p + 4, M_TEMP);
1458 freeenv(s);
1459 }
1460 if (p == NULL) {
1461 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1462 TAG_ROOT);
1463 }
1464#ifdef ROOTDEVNAME
1465 if ((p == NULL || (boothowto & RB_DFLTROOT) != 0) &&
1466 (p = strstr(ROOTDEVNAME, "nfs:")) != NULL) {
1467 p += 4;
1468 }
1469#endif
1470 if (p != NULL) {
1471 if (gctx->setrootfs != NULL) {
1472 printf("rootfs %s (ignored) ", p);
1473 } else if (setfs(&nd->root_saddr,
1474 nd->root_hostnam, p, &ifctx->reply.siaddr)) {
1475 if (*p == '/') {
1476 printf("root_server ");
1477 print_sin_addr(&nd->root_saddr);
1478 printf(" ");
1479 }
1480 printf("rootfs %s ", p);
1481 gctx->gotrootpath = 1;
1482 ifctx->gotrootpath = 1;
1483 gctx->setrootfs = ifctx;
1484
1485 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1486 ifctx->replylen,
1487 TAG_ROOTOPTS);
1488 if (p != NULL) {
1489 mountopts(&nd->root_args, p);
1490 printf("rootopts %s ", p);
1491 }
1492 } else
1493 panic("Failed to set rootfs to %s", p);
1494 }
1495
1496 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1497 TAG_HOSTNAME);
1498 if (p != NULL) {
1499 if (gctx->tag.taglen >= MAXHOSTNAMELEN)
1500 panic("bootpc: hostname >= %d bytes",
1501 MAXHOSTNAMELEN);
1502 if (gctx->sethostname != NULL) {
1503 printf("hostname %s (ignored) ", p);
1504 } else {
1505 strcpy(nd->my_hostnam, p);
1506 mtx_lock(&prison0.pr_mtx);
1507 strcpy(prison0.pr_hostname, p);
1508 mtx_unlock(&prison0.pr_mtx);
1509 printf("hostname %s ", p);
1510 gctx->sethostname = ifctx;
1511 }
1512 }
1513 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1514 TAG_COOKIE);
1515 if (p != NULL) { /* store in a sysctl variable */
1516 int i, l = sizeof(bootp_cookie) - 1;
1517 for (i = 0; i < l && p[i] != '\0'; i++)
1518 bootp_cookie[i] = p[i];
1519 p[i] = '\0';
1520 }
1521
1522
1523 printf("\n");
1524
1525 if (ifctx->gotnetmask == 0) {
1526 if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1527 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
1528 else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1529 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
1530 else
1531 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
1532 }
1533 if (ifctx->gotgw == 0) {
1534 /* Use proxyarp */
1535 ifctx->gw.sin_addr.s_addr = ifctx->myaddr.sin_addr.s_addr;
1536 }
1537}
1538
1539void
1540bootpc_init(void)
1541{
1542 struct bootpc_ifcontext *ifctx; /* Interface BOOTP contexts */
1543 struct bootpc_globalcontext *gctx; /* Global BOOTP context */
1544 struct ifnet *ifp;
1545 struct sockaddr_dl *sdl;
1546 struct ifaddr *ifa;
1547 int error;
1548#ifndef BOOTP_WIRED_TO
1549 int ifcnt;
1550#endif
1551 struct nfsv3_diskless *nd;
1552 struct thread *td;
1553 int timeout;
1554 int delay;
1555
1556 timeout = BOOTP_IFACE_WAIT_TIMEOUT * hz;
1557 delay = hz / 10;
1558
1559 nd = &nfsv3_diskless;
1560 td = curthread;
1561
1562 /*
1563 * If already filled in, don't touch it here
1564 */
1565 if (nfs_diskless_valid != 0)
1566 return;
1567
1568 gctx = malloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO);
1569 STAILQ_INIT(&gctx->interfaces);
1570 gctx->xid = ~0xFFFF;
1571 gctx->starttime = time_second;
1572
1573 /*
1574 * If ROOTDEVNAME is defined or vfs.root.mountfrom is set then we have
1575 * root-path overrides that can potentially let us boot even if we don't
1576 * get a root path from the server, so we can treat that as a non-error.
1577 */
1578#ifdef ROOTDEVNAME
1579 gctx->any_root_overrides = 1;
1580#else
1581 gctx->any_root_overrides = testenv("vfs.root.mountfrom");
1582#endif
1583
1584 /*
1585 * Find a network interface.
1586 */
1587 CURVNET_SET(TD_TO_VNET(td));
1588#ifdef BOOTP_WIRED_TO
1589 printf("%s: wired to interface '%s'\n", __func__,
1590 __XSTRING(BOOTP_WIRED_TO));
1591 allocifctx(gctx);
1592#else
1593 /*
1594 * Preallocate interface context storage, if another interface
1595 * attaches and wins the race, it won't be eligible for bootp.
1596 */
1597 ifcnt = 0;
1598 IFNET_RLOCK();
1599 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1600 if ((ifp->if_flags &
1601 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1602 IFF_BROADCAST)
1603 continue;
1604 switch (ifp->if_alloctype) {
1605 case IFT_ETHER:
1606 case IFT_FDDI:
1607 case IFT_ISO88025:
1608 break;
1609 default:
1610 continue;
1611 }
1612 ifcnt++;
1613 }
1614 IFNET_RUNLOCK();
1615 if (ifcnt == 0)
1616 panic("%s: no eligible interfaces", __func__);
1617 for (; ifcnt > 0; ifcnt--)
1618 allocifctx(gctx);
1619#endif
1620
1621retry:
1622 ifctx = STAILQ_FIRST(&gctx->interfaces);
1623 IFNET_RLOCK();
1624 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1625 if (ifctx == NULL)
1626 break;
1627#ifdef BOOTP_WIRED_TO
1628 if (strcmp(ifp->if_xname, __XSTRING(BOOTP_WIRED_TO)) != 0)
1629 continue;
1630#else
1631 if ((ifp->if_flags &
1632 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1633 IFF_BROADCAST)
1634 continue;
1635 switch (ifp->if_alloctype) {
1636 case IFT_ETHER:
1637 case IFT_FDDI:
1638 case IFT_ISO88025:
1639 break;
1640 default:
1641 continue;
1642 }
1643#endif
1644 strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
1645 sizeof(ifctx->ireq.ifr_name));
1646 ifctx->ifp = ifp;
1647
1648 /* Get HW address */
1649 sdl = NULL;
1650 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1651 if (ifa->ifa_addr->sa_family == AF_LINK) {
1652 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1653 if (sdl->sdl_type == IFT_ETHER)
1654 break;
1655 }
1656 if (sdl == NULL)
1657 panic("bootpc: Unable to find HW address for %s",
1658 ifctx->ireq.ifr_name);
1659 ifctx->sdl = sdl;
1660
1661 ifctx = STAILQ_NEXT(ifctx, next);
1662 }
1663 IFNET_RUNLOCK();
1664 CURVNET_RESTORE();
1665
1666 if (STAILQ_EMPTY(&gctx->interfaces) ||
1667 STAILQ_FIRST(&gctx->interfaces)->ifp == NULL) {
1668 if (timeout > 0) {
1669 pause("bootpc", delay);
1670 timeout -= delay;
1671 goto retry;
1672 }
1673#ifdef BOOTP_WIRED_TO
1674 panic("%s: Could not find interface specified "
1675 "by BOOTP_WIRED_TO: "
1676 __XSTRING(BOOTP_WIRED_TO), __func__);
1677#else
1678 panic("%s: no suitable interface", __func__);
1679#endif
1680 }
1681
1682 error = socreate(AF_INET, &bootp_so, SOCK_DGRAM, 0, td->td_ucred, td);
1683 if (error != 0)
1684 panic("%s: socreate, error=%d", __func__, error);
1685
1686 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1687 bootpc_fakeup_interface(ifctx, td);
1688
1689 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1690 bootpc_compose_query(ifctx, td);
1691
1692 error = bootpc_call(gctx, td);
1693 if (error != 0) {
1694 printf("BOOTP call failed\n");
1695 }
1696
1697 mountopts(&nd->root_args, NULL);
1698
1699 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1700 if (bootpc_ifctx_isresolved(ifctx) != 0)
1701 bootpc_decode_reply(nd, ifctx, gctx);
1702
1703#ifdef BOOTP_NFSROOT
1704 if (gctx->gotrootpath == 0 && gctx->any_root_overrides == 0)
1705 panic("bootpc: No root path offered");
1706#endif
1707
1708 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1709 bootpc_adjust_interface(ifctx, gctx, td);
1710
1711 soclose(bootp_so);
1712
1713 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1714 if (ifctx->gotrootpath != 0)
1715 break;
1716 if (ifctx == NULL) {
1717 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1718 if (bootpc_ifctx_isresolved(ifctx) != 0)
1719 break;
1720 }
1721 if (ifctx == NULL)
1722 goto out;
1723
1724 if (gctx->gotrootpath != 0) {
1725
1726 setenv("boot.netif.name", ifctx->ifp->if_xname);
1727
1728 error = md_mount(&nd->root_saddr, nd->root_hostnam,
1729 nd->root_fh, &nd->root_fhsize,
1730 &nd->root_args, td);
1731 if (error != 0) {
1732 if (gctx->any_root_overrides == 0)
1733 panic("nfs_boot: mount root, error=%d", error);
1734 else
1735 goto out;
1736 }
1737 rootdevnames[0] = "nfs:";
1738#ifdef NFSCLIENT
1739 rootdevnames[1] = "oldnfs:";
1740#endif
1741 nfs_diskless_valid = 3;
1742 }
1743
1744 strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
1745 bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
1746 bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
1747 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
1748 ifctx->myaddr.sin_addr.s_addr |
1749 ~ ifctx->netmask.sin_addr.s_addr;
1750 bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
1751
1752out:
1753 while((ifctx = STAILQ_FIRST(&gctx->interfaces)) != NULL) {
1754 STAILQ_REMOVE_HEAD(&gctx->interfaces, next);
1755 free(ifctx, M_TEMP);
1756 }
1757 free(gctx, M_TEMP);
1758}
1759
1760/*
1761 * RPC: mountd/mount
1762 * Given a server pathname, get an NFS file handle.
1763 * Also, sets sin->sin_port to the NFS service port.
1764 */
1765static int
1766md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp, int *fhsizep,
1767 struct nfs_args *args, struct thread *td)
1768{
1769 struct mbuf *m;
1770 int error;
1771 int authunixok;
1772 int authcount;
1773 int authver;
1774
1775#define RPCPROG_MNT 100005
1776#define RPCMNT_VER1 1
1777#define RPCMNT_VER3 3
1778#define RPCMNT_MOUNT 1
1779#define AUTH_SYS 1 /* unix style (uid, gids) */
1780#define AUTH_UNIX AUTH_SYS
1781
1782 /* XXX honor v2/v3 flags in args->flags? */
1783#ifdef BOOTP_NFSV3
1784 /* First try NFS v3 */
1785 /* Get port number for MOUNTD. */
1786 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1787 &mdsin->sin_port, td);
1788 if (error == 0) {
1789 m = xdr_string_encode(path, strlen(path));
1790
1791 /* Do RPC to mountd. */
1792 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1793 RPCMNT_MOUNT, &m, NULL, td);
1794 }
1795 if (error == 0) {
1796 args->flags |= NFSMNT_NFSV3;
1797 } else {
1798#endif
1799 /* Fallback to NFS v2 */
1800
1801 /* Get port number for MOUNTD. */
1802 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1803 &mdsin->sin_port, td);
1804 if (error != 0)
1805 return error;
1806
1807 m = xdr_string_encode(path, strlen(path));
1808
1809 /* Do RPC to mountd. */
1810 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1811 RPCMNT_MOUNT, &m, NULL, td);
1812 if (error != 0)
1813 return error; /* message already freed */
1814
1815#ifdef BOOTP_NFSV3
1816 }
1817#endif
1818
1819 if (xdr_int_decode(&m, &error) != 0 || error != 0)
1820 goto bad;
1821
1822 if ((args->flags & NFSMNT_NFSV3) != 0) {
1823 if (xdr_int_decode(&m, fhsizep) != 0 ||
1824 *fhsizep > NFSX_V3FHMAX ||
1825 *fhsizep <= 0)
1826 goto bad;
1827 } else
1828 *fhsizep = NFSX_V2FH;
1829
1830 if (xdr_opaque_decode(&m, fhp, *fhsizep) != 0)
1831 goto bad;
1832
1833 if (args->flags & NFSMNT_NFSV3) {
1834 if (xdr_int_decode(&m, &authcount) != 0)
1835 goto bad;
1836 authunixok = 0;
1837 if (authcount < 0 || authcount > 100)
1838 goto bad;
1839 while (authcount > 0) {
1840 if (xdr_int_decode(&m, &authver) != 0)
1841 goto bad;
1842 if (authver == AUTH_UNIX)
1843 authunixok = 1;
1844 authcount--;
1845 }
1846 if (authunixok == 0)
1847 goto bad;
1848 }
1849
1850 /* Set port number for NFS use. */
1851 error = krpc_portmap(mdsin, NFS_PROG,
1852 (args->flags &
1853 NFSMNT_NFSV3) ? NFS_VER3 : NFS_VER2,
1854 &mdsin->sin_port, td);
1855
1856 goto out;
1857
1858bad:
1859 error = EBADRPC;
1860
1861out:
1862 m_freem(m);
1863 return error;
1864}
1865
1866SYSINIT(bootp_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, bootpc_init, NULL);
| 347 printf(" %s\n", rt->rt_ifp->if_xname);
348}
349
350void
351bootpboot_p_tree(struct radix_node *rn)
352{
353
354 while (rn != NULL) {
355 if (rn->rn_bit < 0) {
356 if ((rn->rn_flags & RNF_ROOT) != 0) {
357 } else {
358 bootpboot_p_rtentry((struct rtentry *) rn);
359 }
360 rn = rn->rn_dupedkey;
361 } else {
362 bootpboot_p_tree(rn->rn_left);
363 bootpboot_p_tree(rn->rn_right);
364 return;
365 }
366 }
367}
368
369void
370bootpboot_p_rtlist(void)
371{
372 struct radix_node_head *rnh;
373
374 printf("Routing table:\n");
375 rnh = rt_tables_get_rnh(0, AF_INET);
376 if (rnh == NULL)
377 return;
378 RADIX_NODE_HEAD_RLOCK(rnh); /* could sleep XXX */
379 bootpboot_p_tree(rnh->rnh_treetop);
380 RADIX_NODE_HEAD_RUNLOCK(rnh);
381}
382
383void
384bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
385{
386
387 printf("%s flags %x, addr ",
388 ifp->if_xname, ifp->if_flags);
389 print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
390 printf(", broadcast ");
391 print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
392 printf(", netmask ");
393 print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
394 printf("\n");
395}
396
397void
398bootpboot_p_iflist(void)
399{
400 struct ifnet *ifp;
401 struct ifaddr *ifa;
402
403 printf("Interface list:\n");
404 IFNET_RLOCK();
405 for (ifp = TAILQ_FIRST(&V_ifnet);
406 ifp != NULL;
407 ifp = TAILQ_NEXT(ifp, if_link)) {
408 for (ifa = TAILQ_FIRST(&ifp->if_addrhead);
409 ifa != NULL;
410 ifa = TAILQ_NEXT(ifa, ifa_link))
411 if (ifa->ifa_addr->sa_family == AF_INET)
412 bootpboot_p_if(ifp, ifa);
413 }
414 IFNET_RUNLOCK();
415}
416#endif /* defined(BOOTP_DEBUG) */
417
418static void
419clear_sinaddr(struct sockaddr_in *sin)
420{
421
422 bzero(sin, sizeof(*sin));
423 sin->sin_len = sizeof(*sin);
424 sin->sin_family = AF_INET;
425 sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
426 sin->sin_port = 0;
427}
428
429static void
430allocifctx(struct bootpc_globalcontext *gctx)
431{
432 struct bootpc_ifcontext *ifctx;
433
434 ifctx = malloc(sizeof(*ifctx), M_TEMP, M_WAITOK | M_ZERO);
435 ifctx->xid = gctx->xid;
436#ifdef BOOTP_NO_DHCP
437 ifctx->state = IF_BOOTP_UNRESOLVED;
438#else
439 ifctx->state = IF_DHCP_UNRESOLVED;
440#endif
441 gctx->xid += 0x100;
442 STAILQ_INSERT_TAIL(&gctx->interfaces, ifctx, next);
443}
444
445static __inline int
446bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
447{
448
449 if (ifctx->state == IF_BOOTP_RESOLVED ||
450 ifctx->state == IF_DHCP_RESOLVED)
451 return 1;
452 return 0;
453}
454
455static __inline int
456bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
457{
458
459 if (ifctx->state == IF_BOOTP_UNRESOLVED ||
460 ifctx->state == IF_DHCP_UNRESOLVED)
461 return 1;
462 return 0;
463}
464
465static __inline int
466bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
467{
468
469 if (ifctx->state == IF_BOOTP_FAILED ||
470 ifctx->state == IF_DHCP_FAILED)
471 return 1;
472 return 0;
473}
474
475static int
476bootpc_received(struct bootpc_globalcontext *gctx,
477 struct bootpc_ifcontext *ifctx)
478{
479 unsigned char dhcpreplytype;
480 char *p;
481
482 /*
483 * Need timeout for fallback to less
484 * desirable alternative.
485 */
486
487 /* This call used for the side effect (badopt flag) */
488 (void) bootpc_tag(&gctx->tmptag, &gctx->reply,
489 gctx->replylen,
490 TAG_END);
491
492 /* If packet is invalid, ignore it */
493 if (gctx->tmptag.badopt != 0)
494 return 0;
495
496 p = bootpc_tag(&gctx->tmptag, &gctx->reply,
497 gctx->replylen, TAG_DHCP_MSGTYPE);
498 if (p != NULL)
499 dhcpreplytype = *p;
500 else
501 dhcpreplytype = DHCP_NOMSG;
502
503 switch (ifctx->dhcpquerytype) {
504 case DHCP_DISCOVER:
505 if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
506#ifndef BOOTP_FORCE_DHCP
507 && dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
508#endif
509 )
510 return 0;
511 break;
512 case DHCP_REQUEST:
513 if (dhcpreplytype != DHCP_ACK)
514 return 0;
515 case DHCP_NOMSG:
516 break;
517 }
518
519 /* Ignore packet unless it gives us a root tag we didn't have */
520
521 if ((ifctx->state == IF_BOOTP_RESOLVED ||
522 (ifctx->dhcpquerytype == DHCP_DISCOVER &&
523 (ifctx->state == IF_DHCP_OFFERED ||
524 ifctx->state == IF_DHCP_RESOLVED))) &&
525 (bootpc_tag(&gctx->tmptag, &ifctx->reply,
526 ifctx->replylen,
527 TAG_ROOT) != NULL ||
528 bootpc_tag(&gctx->tmptag, &gctx->reply,
529 gctx->replylen,
530 TAG_ROOT) == NULL))
531 return 0;
532
533 bcopy(&gctx->reply, &ifctx->reply, gctx->replylen);
534 ifctx->replylen = gctx->replylen;
535
536 /* XXX: Only reset if 'perfect' response */
537 if (ifctx->state == IF_BOOTP_UNRESOLVED)
538 ifctx->state = IF_BOOTP_RESOLVED;
539 else if (ifctx->state == IF_DHCP_UNRESOLVED &&
540 ifctx->dhcpquerytype == DHCP_DISCOVER) {
541 if (dhcpreplytype == DHCP_OFFER)
542 ifctx->state = IF_DHCP_OFFERED;
543 else
544 ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */
545 } else if (ifctx->state == IF_DHCP_OFFERED &&
546 ifctx->dhcpquerytype == DHCP_REQUEST)
547 ifctx->state = IF_DHCP_RESOLVED;
548
549
550 if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
551 ifctx->state != IF_BOOTP_RESOLVED) {
552 p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
553 ifctx->replylen, TAG_DHCP_SERVERID);
554 if (p != NULL && gctx->tmptag.taglen == 4) {
555 memcpy(&ifctx->dhcpserver, p, 4);
556 ifctx->gotdhcpserver = 1;
557 } else
558 ifctx->gotdhcpserver = 0;
559 return 1;
560 }
561
562 ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
563 ifctx->replylen,
564 TAG_ROOT) != NULL);
565 ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
566 ifctx->replylen,
567 TAG_ROUTERS) != NULL);
568 ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
569 ifctx->replylen,
570 TAG_SUBNETMASK) != NULL);
571 return 1;
572}
573
574static int
575bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
576{
577 struct sockaddr_in *sin, dst;
578 struct uio auio;
579 struct sockopt sopt;
580 struct iovec aio;
581 int error, on, rcvflg, timo, len;
582 time_t atimo;
583 time_t rtimo;
584 struct timeval tv;
585 struct bootpc_ifcontext *ifctx;
586 int outstanding;
587 int gotrootpath;
588 int retry;
589 const char *s;
590
591 tv.tv_sec = 1;
592 tv.tv_usec = 0;
593 bzero(&sopt, sizeof(sopt));
594 sopt.sopt_dir = SOPT_SET;
595 sopt.sopt_level = SOL_SOCKET;
596 sopt.sopt_name = SO_RCVTIMEO;
597 sopt.sopt_val = &tv;
598 sopt.sopt_valsize = sizeof tv;
599
600 error = sosetopt(bootp_so, &sopt);
601 if (error != 0)
602 goto out;
603
604 /*
605 * Enable broadcast.
606 */
607 on = 1;
608 sopt.sopt_name = SO_BROADCAST;
609 sopt.sopt_val = &on;
610 sopt.sopt_valsize = sizeof on;
611
612 error = sosetopt(bootp_so, &sopt);
613 if (error != 0)
614 goto out;
615
616 /*
617 * Disable routing.
618 */
619
620 on = 1;
621 sopt.sopt_name = SO_DONTROUTE;
622 sopt.sopt_val = &on;
623 sopt.sopt_valsize = sizeof on;
624
625 error = sosetopt(bootp_so, &sopt);
626 if (error != 0)
627 goto out;
628
629 /*
630 * Bind the local endpoint to a bootp client port.
631 */
632 sin = &dst;
633 clear_sinaddr(sin);
634 sin->sin_port = htons(IPPORT_BOOTPC);
635 error = sobind(bootp_so, (struct sockaddr *)sin, td);
636 if (error != 0) {
637 printf("bind failed\n");
638 goto out;
639 }
640
641 /*
642 * Setup socket address for the server.
643 */
644 sin = &dst;
645 clear_sinaddr(sin);
646 sin->sin_addr.s_addr = INADDR_BROADCAST;
647 sin->sin_port = htons(IPPORT_BOOTPS);
648
649 /*
650 * Send it, repeatedly, until a reply is received,
651 * but delay each re-send by an increasing amount.
652 * If the delay hits the maximum, start complaining.
653 */
654 timo = 0;
655 rtimo = 0;
656 for (;;) {
657
658 outstanding = 0;
659 gotrootpath = 0;
660
661 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
662 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
663 bootpc_tag(&gctx->tmptag, &ifctx->reply,
664 ifctx->replylen,
665 TAG_ROOT) != NULL)
666 gotrootpath = 1;
667 }
668
669 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
670 struct in_aliasreq *ifra = &ifctx->iareq;
671 sin = (struct sockaddr_in *)&ifra->ifra_mask;
672
673 ifctx->outstanding = 0;
674 if (bootpc_ifctx_isresolved(ifctx) != 0 &&
675 gotrootpath != 0) {
676 continue;
677 }
678 if (bootpc_ifctx_isfailed(ifctx) != 0)
679 continue;
680
681 outstanding++;
682 ifctx->outstanding = 1;
683
684 /* Proceed to next step in DHCP negotiation */
685 if ((ifctx->state == IF_DHCP_OFFERED &&
686 ifctx->dhcpquerytype != DHCP_REQUEST) ||
687 (ifctx->state == IF_DHCP_UNRESOLVED &&
688 ifctx->dhcpquerytype != DHCP_DISCOVER) ||
689 (ifctx->state == IF_BOOTP_UNRESOLVED &&
690 ifctx->dhcpquerytype != DHCP_NOMSG)) {
691 ifctx->sentmsg = 0;
692 bootpc_compose_query(ifctx, td);
693 }
694
695 /* Send BOOTP request (or re-send). */
696
697 if (ifctx->sentmsg == 0) {
698 switch(ifctx->dhcpquerytype) {
699 case DHCP_DISCOVER:
700 s = "DHCP Discover";
701 break;
702 case DHCP_REQUEST:
703 s = "DHCP Request";
704 break;
705 case DHCP_NOMSG:
706 default:
707 s = "BOOTP Query";
708 break;
709 }
710 printf("Sending %s packet from "
711 "interface %s (%*D)\n",
712 s,
713 ifctx->ireq.ifr_name,
714 ifctx->sdl->sdl_alen,
715 (unsigned char *) LLADDR(ifctx->sdl),
716 ":");
717 ifctx->sentmsg = 1;
718 }
719
720 aio.iov_base = (caddr_t) &ifctx->call;
721 aio.iov_len = sizeof(ifctx->call);
722
723 auio.uio_iov = &aio;
724 auio.uio_iovcnt = 1;
725 auio.uio_segflg = UIO_SYSSPACE;
726 auio.uio_rw = UIO_WRITE;
727 auio.uio_offset = 0;
728 auio.uio_resid = sizeof(ifctx->call);
729 auio.uio_td = td;
730
731 /* Set netmask to 0.0.0.0 */
732 clear_sinaddr(sin);
733 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra,
734 td);
735 if (error != 0)
736 panic("%s: SIOCAIFADDR, error=%d", __func__,
737 error);
738
739 error = sosend(bootp_so, (struct sockaddr *) &dst,
740 &auio, NULL, NULL, 0, td);
741 if (error != 0)
742 printf("%s: sosend: %d state %08x\n", __func__,
743 error, (int )bootp_so->so_state);
744
745 /* Set netmask to 255.0.0.0 */
746 sin->sin_addr.s_addr = htonl(IN_CLASSA_NET);
747 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra,
748 td);
749 if (error != 0)
750 panic("%s: SIOCAIFADDR, error=%d", __func__,
751 error);
752 }
753
754 if (outstanding == 0 &&
755 (rtimo == 0 || time_second >= rtimo)) {
756 error = 0;
757 goto out;
758 }
759
760 /* Determine new timeout. */
761 if (timo < MAX_RESEND_DELAY)
762 timo++;
763 else {
764 printf("DHCP/BOOTP timeout for server ");
765 print_sin_addr(&dst);
766 printf("\n");
767 }
768
769 /*
770 * Wait for up to timo seconds for a reply.
771 * The socket receive timeout was set to 1 second.
772 */
773 atimo = timo + time_second;
774 while (time_second < atimo) {
775 aio.iov_base = (caddr_t) &gctx->reply;
776 aio.iov_len = sizeof(gctx->reply);
777
778 auio.uio_iov = &aio;
779 auio.uio_iovcnt = 1;
780 auio.uio_segflg = UIO_SYSSPACE;
781 auio.uio_rw = UIO_READ;
782 auio.uio_offset = 0;
783 auio.uio_resid = sizeof(gctx->reply);
784 auio.uio_td = td;
785
786 rcvflg = 0;
787 error = soreceive(bootp_so, NULL, &auio,
788 NULL, NULL, &rcvflg);
789 gctx->secs = time_second - gctx->starttime;
790 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
791 if (bootpc_ifctx_isresolved(ifctx) != 0 ||
792 bootpc_ifctx_isfailed(ifctx) != 0)
793 continue;
794
795 ifctx->call.secs = htons(gctx->secs);
796 }
797 if (error == EWOULDBLOCK)
798 continue;
799 if (error != 0)
800 goto out;
801 len = sizeof(gctx->reply) - auio.uio_resid;
802
803 /* Do we have the required number of bytes ? */
804 if (len < BOOTP_MIN_LEN)
805 continue;
806 gctx->replylen = len;
807
808 /* Is it a reply? */
809 if (gctx->reply.op != BOOTP_REPLY)
810 continue;
811
812 /* Is this an answer to our query */
813 STAILQ_FOREACH(ifctx, &gctx->interfaces, next) {
814 if (gctx->reply.xid != ifctx->call.xid)
815 continue;
816
817 /* Same HW address size ? */
818 if (gctx->reply.hlen != ifctx->call.hlen)
819 continue;
820
821 /* Correct HW address ? */
822 if (bcmp(gctx->reply.chaddr,
823 ifctx->call.chaddr,
824 ifctx->call.hlen) != 0)
825 continue;
826
827 break;
828 }
829
830 if (ifctx != NULL) {
831 s = bootpc_tag(&gctx->tmptag,
832 &gctx->reply,
833 gctx->replylen,
834 TAG_DHCP_MSGTYPE);
835 if (s != NULL) {
836 switch (*s) {
837 case DHCP_OFFER:
838 s = "DHCP Offer";
839 break;
840 case DHCP_ACK:
841 s = "DHCP Ack";
842 break;
843 default:
844 s = "DHCP (unexpected)";
845 break;
846 }
847 } else
848 s = "BOOTP Reply";
849
850 printf("Received %s packet"
851 " on %s from ",
852 s,
853 ifctx->ireq.ifr_name);
854 print_in_addr(gctx->reply.siaddr);
855 if (gctx->reply.giaddr.s_addr !=
856 htonl(INADDR_ANY)) {
857 printf(" via ");
858 print_in_addr(gctx->reply.giaddr);
859 }
860 if (bootpc_received(gctx, ifctx) != 0) {
861 printf(" (accepted)");
862 if (ifctx->outstanding) {
863 ifctx->outstanding = 0;
864 outstanding--;
865 }
866 /* Network settle delay */
867 if (outstanding == 0)
868 atimo = time_second +
869 BOOTP_SETTLE_DELAY;
870 } else
871 printf(" (ignored)");
872 if (ifctx->gotrootpath ||
873 gctx->any_root_overrides) {
874 gotrootpath = 1;
875 rtimo = time_second +
876 BOOTP_SETTLE_DELAY;
877 if (ifctx->gotrootpath)
878 printf(" (got root path)");
879 }
880 printf("\n");
881 }
882 } /* while secs */
883#ifdef BOOTP_TIMEOUT
884 if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
885 break;
886#endif
887 /* Force a retry if halfway in DHCP negotiation */
888 retry = 0;
889 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
890 if (ifctx->state == IF_DHCP_OFFERED) {
891 if (ifctx->dhcpquerytype == DHCP_DISCOVER)
892 retry = 1;
893 else
894 ifctx->state = IF_DHCP_UNRESOLVED;
895 }
896
897 if (retry != 0)
898 continue;
899
900 if (gotrootpath != 0) {
901 gctx->gotrootpath = gotrootpath;
902 if (rtimo != 0 && time_second >= rtimo)
903 break;
904 }
905 } /* forever send/receive */
906
907 /*
908 * XXX: These are errors of varying seriousness being silently
909 * ignored
910 */
911
912 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
913 if (bootpc_ifctx_isresolved(ifctx) == 0) {
914 printf("%s timeout for interface %s\n",
915 ifctx->dhcpquerytype != DHCP_NOMSG ?
916 "DHCP" : "BOOTP",
917 ifctx->ireq.ifr_name);
918 }
919
920 if (gctx->gotrootpath != 0) {
921#if 0
922 printf("Got a root path, ignoring remaining timeout\n");
923#endif
924 error = 0;
925 goto out;
926 }
927#ifndef BOOTP_NFSROOT
928 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
929 if (bootpc_ifctx_isresolved(ifctx) != 0) {
930 error = 0;
931 goto out;
932 }
933#endif
934 error = ETIMEDOUT;
935
936out:
937 return (error);
938}
939
940static void
941bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx, struct thread *td)
942{
943 struct ifreq *ifr;
944 struct in_aliasreq *ifra;
945 struct sockaddr_in *sin;
946 int error;
947
948 ifr = &ifctx->ireq;
949 ifra = &ifctx->iareq;
950
951 /*
952 * Bring up the interface.
953 *
954 * Get the old interface flags and or IFF_UP into them; if
955 * IFF_UP set blindly, interface selection can be clobbered.
956 */
957 error = ifioctl(bootp_so, SIOCGIFFLAGS, (caddr_t)ifr, td);
958 if (error != 0)
959 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
960 ifr->ifr_flags |= IFF_UP;
961 error = ifioctl(bootp_so, SIOCSIFFLAGS, (caddr_t)ifr, td);
962 if (error != 0)
963 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
964
965 /*
966 * Do enough of ifconfig(8) so that the chosen interface
967 * can talk to the servers. Set address to 0.0.0.0/8 and
968 * broadcast address to local broadcast.
969 */
970 sin = (struct sockaddr_in *)&ifra->ifra_addr;
971 clear_sinaddr(sin);
972 sin = (struct sockaddr_in *)&ifra->ifra_mask;
973 clear_sinaddr(sin);
974 sin->sin_addr.s_addr = htonl(IN_CLASSA_NET);
975 sin = (struct sockaddr_in *)&ifra->ifra_broadaddr;
976 clear_sinaddr(sin);
977 sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
978 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra, td);
979 if (error != 0)
980 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
981}
982
983static void
984bootpc_shutdown_interface(struct bootpc_ifcontext *ifctx, struct thread *td)
985{
986 struct ifreq *ifr;
987 struct sockaddr_in *sin;
988 int error;
989
990 ifr = &ifctx->ireq;
991
992 printf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
993 error = ifioctl(bootp_so, SIOCGIFFLAGS, (caddr_t)ifr, td);
994 if (error != 0)
995 panic("%s: SIOCGIFFLAGS, error=%d", __func__, error);
996 ifr->ifr_flags &= ~IFF_UP;
997 error = ifioctl(bootp_so, SIOCSIFFLAGS, (caddr_t)ifr, td);
998 if (error != 0)
999 panic("%s: SIOCSIFFLAGS, error=%d", __func__, error);
1000
1001 sin = (struct sockaddr_in *) &ifr->ifr_addr;
1002 clear_sinaddr(sin);
1003 error = ifioctl(bootp_so, SIOCDIFADDR, (caddr_t) ifr, td);
1004 if (error != 0)
1005 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
1006}
1007
1008static int
1009bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
1010 struct bootpc_globalcontext *gctx, struct thread *td)
1011{
1012 int error;
1013 struct sockaddr_in defdst;
1014 struct sockaddr_in defmask;
1015 struct sockaddr_in *sin;
1016 struct ifreq *ifr;
1017 struct in_aliasreq *ifra;
1018 struct sockaddr_in *myaddr;
1019 struct sockaddr_in *netmask;
1020 struct sockaddr_in *gw;
1021
1022 ifr = &ifctx->ireq;
1023 ifra = &ifctx->iareq;
1024 myaddr = &ifctx->myaddr;
1025 netmask = &ifctx->netmask;
1026 gw = &ifctx->gw;
1027
1028 if (bootpc_ifctx_isresolved(ifctx) == 0) {
1029 /* Shutdown interfaces where BOOTP failed */
1030 bootpc_shutdown_interface(ifctx, td);
1031 return (0);
1032 }
1033
1034 printf("Adjusted interface %s\n", ifctx->ireq.ifr_name);
1035 /*
1036 * Do enough of ifconfig(8) so that the chosen interface
1037 * can talk to the servers. (just set the address)
1038 */
1039 sin = (struct sockaddr_in *) &ifr->ifr_addr;
1040 clear_sinaddr(sin);
1041 error = ifioctl(bootp_so, SIOCDIFADDR, (caddr_t) ifr, td);
1042 if (error != 0)
1043 panic("%s: SIOCDIFADDR, error=%d", __func__, error);
1044
1045 bcopy(myaddr, &ifra->ifra_addr, sizeof(*myaddr));
1046 bcopy(netmask, &ifra->ifra_mask, sizeof(*netmask));
1047 clear_sinaddr(&ifra->ifra_broadaddr);
1048 ifra->ifra_broadaddr.sin_addr.s_addr = myaddr->sin_addr.s_addr |
1049 ~netmask->sin_addr.s_addr;
1050
1051 error = ifioctl(bootp_so, SIOCAIFADDR, (caddr_t)ifra, td);
1052 if (error != 0)
1053 panic("%s: SIOCAIFADDR, error=%d", __func__, error);
1054
1055 /* Add new default route */
1056
1057 if (ifctx->gotgw != 0 || gctx->gotgw == 0) {
1058 clear_sinaddr(&defdst);
1059 clear_sinaddr(&defmask);
1060 /* XXX MRT just table 0 */
1061 error = rtrequest_fib(RTM_ADD,
1062 (struct sockaddr *) &defdst, (struct sockaddr *) gw,
1063 (struct sockaddr *) &defmask,
1064 (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL, RT_DEFAULT_FIB);
1065 if (error != 0) {
1066 printf("%s: RTM_ADD, error=%d\n", __func__, error);
1067 return (error);
1068 }
1069 }
1070
1071 return (0);
1072}
1073
1074static int
1075setfs(struct sockaddr_in *addr, char *path, char *p,
1076 const struct in_addr *siaddr)
1077{
1078
1079 if (getip(&p, &addr->sin_addr) == 0) {
1080 if (siaddr != NULL && *p == '/')
1081 bcopy(siaddr, &addr->sin_addr, sizeof(struct in_addr));
1082 else
1083 return 0;
1084 } else {
1085 if (*p != ':')
1086 return 0;
1087 p++;
1088 }
1089
1090 addr->sin_len = sizeof(struct sockaddr_in);
1091 addr->sin_family = AF_INET;
1092
1093 strlcpy(path, p, MNAMELEN);
1094 return 1;
1095}
1096
1097static int
1098getip(char **ptr, struct in_addr *addr)
1099{
1100 char *p;
1101 unsigned int ip;
1102 int val;
1103
1104 p = *ptr;
1105 ip = 0;
1106 if (((val = getdec(&p)) < 0) || (val > 255))
1107 return 0;
1108 ip = val << 24;
1109 if (*p != '.')
1110 return 0;
1111 p++;
1112 if (((val = getdec(&p)) < 0) || (val > 255))
1113 return 0;
1114 ip |= (val << 16);
1115 if (*p != '.')
1116 return 0;
1117 p++;
1118 if (((val = getdec(&p)) < 0) || (val > 255))
1119 return 0;
1120 ip |= (val << 8);
1121 if (*p != '.')
1122 return 0;
1123 p++;
1124 if (((val = getdec(&p)) < 0) || (val > 255))
1125 return 0;
1126 ip |= val;
1127
1128 addr->s_addr = htonl(ip);
1129 *ptr = p;
1130 return 1;
1131}
1132
1133static int
1134getdec(char **ptr)
1135{
1136 char *p;
1137 int ret;
1138
1139 p = *ptr;
1140 ret = 0;
1141 if ((*p < '0') || (*p > '9'))
1142 return -1;
1143 while ((*p >= '0') && (*p <= '9')) {
1144 ret = ret * 10 + (*p - '0');
1145 p++;
1146 }
1147 *ptr = p;
1148 return ret;
1149}
1150
1151static void
1152mountopts(struct nfs_args *args, char *p)
1153{
1154 args->version = NFS_ARGSVERSION;
1155 args->rsize = BOOTP_BLOCKSIZE;
1156 args->wsize = BOOTP_BLOCKSIZE;
1157 args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
1158 args->sotype = SOCK_DGRAM;
1159 if (p != NULL)
1160 nfs_parse_options(p, args);
1161}
1162
1163static int
1164xdr_opaque_decode(struct mbuf **mptr, u_char *buf, int len)
1165{
1166 struct mbuf *m;
1167 int alignedlen;
1168
1169 m = *mptr;
1170 alignedlen = ( len + 3 ) & ~3;
1171
1172 if (m->m_len < alignedlen) {
1173 m = m_pullup(m, alignedlen);
1174 if (m == NULL) {
1175 *mptr = NULL;
1176 return EBADRPC;
1177 }
1178 }
1179 bcopy(mtod(m, u_char *), buf, len);
1180 m_adj(m, alignedlen);
1181 *mptr = m;
1182 return 0;
1183}
1184
1185static int
1186xdr_int_decode(struct mbuf **mptr, int *iptr)
1187{
1188 u_int32_t i;
1189
1190 if (xdr_opaque_decode(mptr, (u_char *) &i, sizeof(u_int32_t)) != 0)
1191 return EBADRPC;
1192 *iptr = fxdr_unsigned(u_int32_t, i);
1193 return 0;
1194}
1195
1196static void
1197print_sin_addr(struct sockaddr_in *sin)
1198{
1199
1200 print_in_addr(sin->sin_addr);
1201}
1202
1203static void
1204print_in_addr(struct in_addr addr)
1205{
1206 unsigned int ip;
1207
1208 ip = ntohl(addr.s_addr);
1209 printf("%d.%d.%d.%d",
1210 ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
1211}
1212
1213static void
1214bootpc_compose_query(struct bootpc_ifcontext *ifctx, struct thread *td)
1215{
1216 unsigned char *vendp;
1217 unsigned char vendor_client[64];
1218 uint32_t leasetime;
1219 uint8_t vendor_client_len;
1220
1221 ifctx->gotrootpath = 0;
1222
1223 bzero((caddr_t) &ifctx->call, sizeof(ifctx->call));
1224
1225 /* bootpc part */
1226 ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */
1227 ifctx->call.htype = 1; /* 10mb ethernet */
1228 ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
1229 ifctx->call.hops = 0;
1230 if (bootpc_ifctx_isunresolved(ifctx) != 0)
1231 ifctx->xid++;
1232 ifctx->call.xid = txdr_unsigned(ifctx->xid);
1233 bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
1234
1235 vendp = ifctx->call.vend;
1236 *vendp++ = 99; /* RFC1048 cookie */
1237 *vendp++ = 130;
1238 *vendp++ = 83;
1239 *vendp++ = 99;
1240 *vendp++ = TAG_MAXMSGSIZE;
1241 *vendp++ = 2;
1242 *vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
1243 *vendp++ = sizeof(struct bootp_packet) & 255;
1244
1245 snprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
1246 ostype, MACHINE, osrelease);
1247 vendor_client_len = strlen(vendor_client);
1248 *vendp++ = TAG_VENDOR_INDENTIFIER;
1249 *vendp++ = vendor_client_len;
1250 memcpy(vendp, vendor_client, vendor_client_len);
1251 vendp += vendor_client_len;
1252 ifctx->dhcpquerytype = DHCP_NOMSG;
1253 switch (ifctx->state) {
1254 case IF_DHCP_UNRESOLVED:
1255 *vendp++ = TAG_DHCP_MSGTYPE;
1256 *vendp++ = 1;
1257 *vendp++ = DHCP_DISCOVER;
1258 ifctx->dhcpquerytype = DHCP_DISCOVER;
1259 ifctx->gotdhcpserver = 0;
1260 break;
1261 case IF_DHCP_OFFERED:
1262 *vendp++ = TAG_DHCP_MSGTYPE;
1263 *vendp++ = 1;
1264 *vendp++ = DHCP_REQUEST;
1265 ifctx->dhcpquerytype = DHCP_REQUEST;
1266 *vendp++ = TAG_DHCP_REQ_ADDR;
1267 *vendp++ = 4;
1268 memcpy(vendp, &ifctx->reply.yiaddr, 4);
1269 vendp += 4;
1270 if (ifctx->gotdhcpserver != 0) {
1271 *vendp++ = TAG_DHCP_SERVERID;
1272 *vendp++ = 4;
1273 memcpy(vendp, &ifctx->dhcpserver, 4);
1274 vendp += 4;
1275 }
1276 *vendp++ = TAG_DHCP_LEASETIME;
1277 *vendp++ = 4;
1278 leasetime = htonl(300);
1279 memcpy(vendp, &leasetime, 4);
1280 vendp += 4;
1281 break;
1282 default:
1283 break;
1284 }
1285 *vendp = TAG_END;
1286
1287 ifctx->call.secs = 0;
1288 ifctx->call.flags = htons(0x8000); /* We need a broadcast answer */
1289}
1290
1291static int
1292bootpc_hascookie(struct bootp_packet *bp)
1293{
1294
1295 return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
1296 bp->vend[2] == 83 && bp->vend[3] == 99);
1297}
1298
1299static void
1300bootpc_tag_helper(struct bootpc_tagcontext *tctx,
1301 unsigned char *start, int len, int tag)
1302{
1303 unsigned char *j;
1304 unsigned char *ej;
1305 unsigned char code;
1306
1307 if (tctx->badtag != 0 || tctx->badopt != 0)
1308 return;
1309
1310 j = start;
1311 ej = j + len;
1312
1313 while (j < ej) {
1314 code = *j++;
1315 if (code == TAG_PAD)
1316 continue;
1317 if (code == TAG_END)
1318 return;
1319 if (j >= ej || j + *j + 1 > ej) {
1320 tctx->badopt = 1;
1321 return;
1322 }
1323 len = *j++;
1324 if (code == tag) {
1325 if (tctx->taglen + len > TAG_MAXLEN) {
1326 tctx->badtag = 1;
1327 return;
1328 }
1329 tctx->foundopt = 1;
1330 if (len > 0)
1331 memcpy(tctx->buf + tctx->taglen,
1332 j, len);
1333 tctx->taglen += len;
1334 }
1335 if (code == TAG_OVERLOAD)
1336 tctx->overload = *j;
1337
1338 j += len;
1339 }
1340}
1341
1342static unsigned char *
1343bootpc_tag(struct bootpc_tagcontext *tctx,
1344 struct bootp_packet *bp, int len, int tag)
1345{
1346 tctx->overload = 0;
1347 tctx->badopt = 0;
1348 tctx->badtag = 0;
1349 tctx->foundopt = 0;
1350 tctx->taglen = 0;
1351
1352 if (bootpc_hascookie(bp) == 0)
1353 return NULL;
1354
1355 bootpc_tag_helper(tctx, &bp->vend[4],
1356 (unsigned char *) bp + len - &bp->vend[4], tag);
1357
1358 if ((tctx->overload & OVERLOAD_FILE) != 0)
1359 bootpc_tag_helper(tctx,
1360 (unsigned char *) bp->file,
1361 sizeof(bp->file),
1362 tag);
1363 if ((tctx->overload & OVERLOAD_SNAME) != 0)
1364 bootpc_tag_helper(tctx,
1365 (unsigned char *) bp->sname,
1366 sizeof(bp->sname),
1367 tag);
1368
1369 if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
1370 return NULL;
1371 tctx->buf[tctx->taglen] = '\0';
1372 return tctx->buf;
1373}
1374
1375static void
1376bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
1377 struct bootpc_globalcontext *gctx)
1378{
1379 char *p, *s;
1380 unsigned int ip;
1381
1382 ifctx->gotgw = 0;
1383 ifctx->gotnetmask = 0;
1384
1385 clear_sinaddr(&ifctx->myaddr);
1386 clear_sinaddr(&ifctx->netmask);
1387 clear_sinaddr(&ifctx->gw);
1388
1389 ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
1390
1391 ip = ntohl(ifctx->myaddr.sin_addr.s_addr);
1392
1393 printf("%s at ", ifctx->ireq.ifr_name);
1394 print_sin_addr(&ifctx->myaddr);
1395 printf(" server ");
1396 print_in_addr(ifctx->reply.siaddr);
1397
1398 ifctx->gw.sin_addr = ifctx->reply.giaddr;
1399 if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
1400 printf(" via gateway ");
1401 print_in_addr(ifctx->reply.giaddr);
1402 }
1403
1404 /* This call used for the side effect (overload flag) */
1405 (void) bootpc_tag(&gctx->tmptag,
1406 &ifctx->reply, ifctx->replylen, TAG_END);
1407
1408 if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
1409 if (ifctx->reply.sname[0] != '\0')
1410 printf(" server name %s", ifctx->reply.sname);
1411 if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
1412 if (ifctx->reply.file[0] != '\0')
1413 printf(" boot file %s", ifctx->reply.file);
1414
1415 printf("\n");
1416
1417 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1418 TAG_SUBNETMASK);
1419 if (p != NULL) {
1420 if (gctx->tag.taglen != 4)
1421 panic("bootpc: subnet mask len is %d",
1422 gctx->tag.taglen);
1423 bcopy(p, &ifctx->netmask.sin_addr, 4);
1424 ifctx->gotnetmask = 1;
1425 printf("subnet mask ");
1426 print_sin_addr(&ifctx->netmask);
1427 printf(" ");
1428 }
1429
1430 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1431 TAG_ROUTERS);
1432 if (p != NULL) {
1433 /* Routers */
1434 if (gctx->tag.taglen % 4)
1435 panic("bootpc: Router Len is %d", gctx->tag.taglen);
1436 if (gctx->tag.taglen > 0) {
1437 bcopy(p, &ifctx->gw.sin_addr, 4);
1438 printf("router ");
1439 print_sin_addr(&ifctx->gw);
1440 printf(" ");
1441 ifctx->gotgw = 1;
1442 gctx->gotgw = 1;
1443 }
1444 }
1445
1446 /*
1447 * Choose a root filesystem. If a value is forced in the environment
1448 * and it contains "nfs:", use it unconditionally. Otherwise, if the
1449 * kernel is compiled with the ROOTDEVNAME option, then use it if:
1450 * - The server doesn't provide a pathname.
1451 * - The boothowto flags include RB_DFLTROOT (user said to override
1452 * the server value).
1453 */
1454 p = NULL;
1455 if ((s = getenv("vfs.root.mountfrom")) != NULL) {
1456 if ((p = strstr(s, "nfs:")) != NULL)
1457 p = strdup(p + 4, M_TEMP);
1458 freeenv(s);
1459 }
1460 if (p == NULL) {
1461 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1462 TAG_ROOT);
1463 }
1464#ifdef ROOTDEVNAME
1465 if ((p == NULL || (boothowto & RB_DFLTROOT) != 0) &&
1466 (p = strstr(ROOTDEVNAME, "nfs:")) != NULL) {
1467 p += 4;
1468 }
1469#endif
1470 if (p != NULL) {
1471 if (gctx->setrootfs != NULL) {
1472 printf("rootfs %s (ignored) ", p);
1473 } else if (setfs(&nd->root_saddr,
1474 nd->root_hostnam, p, &ifctx->reply.siaddr)) {
1475 if (*p == '/') {
1476 printf("root_server ");
1477 print_sin_addr(&nd->root_saddr);
1478 printf(" ");
1479 }
1480 printf("rootfs %s ", p);
1481 gctx->gotrootpath = 1;
1482 ifctx->gotrootpath = 1;
1483 gctx->setrootfs = ifctx;
1484
1485 p = bootpc_tag(&gctx->tag, &ifctx->reply,
1486 ifctx->replylen,
1487 TAG_ROOTOPTS);
1488 if (p != NULL) {
1489 mountopts(&nd->root_args, p);
1490 printf("rootopts %s ", p);
1491 }
1492 } else
1493 panic("Failed to set rootfs to %s", p);
1494 }
1495
1496 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1497 TAG_HOSTNAME);
1498 if (p != NULL) {
1499 if (gctx->tag.taglen >= MAXHOSTNAMELEN)
1500 panic("bootpc: hostname >= %d bytes",
1501 MAXHOSTNAMELEN);
1502 if (gctx->sethostname != NULL) {
1503 printf("hostname %s (ignored) ", p);
1504 } else {
1505 strcpy(nd->my_hostnam, p);
1506 mtx_lock(&prison0.pr_mtx);
1507 strcpy(prison0.pr_hostname, p);
1508 mtx_unlock(&prison0.pr_mtx);
1509 printf("hostname %s ", p);
1510 gctx->sethostname = ifctx;
1511 }
1512 }
1513 p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
1514 TAG_COOKIE);
1515 if (p != NULL) { /* store in a sysctl variable */
1516 int i, l = sizeof(bootp_cookie) - 1;
1517 for (i = 0; i < l && p[i] != '\0'; i++)
1518 bootp_cookie[i] = p[i];
1519 p[i] = '\0';
1520 }
1521
1522
1523 printf("\n");
1524
1525 if (ifctx->gotnetmask == 0) {
1526 if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1527 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
1528 else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
1529 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
1530 else
1531 ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
1532 }
1533 if (ifctx->gotgw == 0) {
1534 /* Use proxyarp */
1535 ifctx->gw.sin_addr.s_addr = ifctx->myaddr.sin_addr.s_addr;
1536 }
1537}
1538
1539void
1540bootpc_init(void)
1541{
1542 struct bootpc_ifcontext *ifctx; /* Interface BOOTP contexts */
1543 struct bootpc_globalcontext *gctx; /* Global BOOTP context */
1544 struct ifnet *ifp;
1545 struct sockaddr_dl *sdl;
1546 struct ifaddr *ifa;
1547 int error;
1548#ifndef BOOTP_WIRED_TO
1549 int ifcnt;
1550#endif
1551 struct nfsv3_diskless *nd;
1552 struct thread *td;
1553 int timeout;
1554 int delay;
1555
1556 timeout = BOOTP_IFACE_WAIT_TIMEOUT * hz;
1557 delay = hz / 10;
1558
1559 nd = &nfsv3_diskless;
1560 td = curthread;
1561
1562 /*
1563 * If already filled in, don't touch it here
1564 */
1565 if (nfs_diskless_valid != 0)
1566 return;
1567
1568 gctx = malloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO);
1569 STAILQ_INIT(&gctx->interfaces);
1570 gctx->xid = ~0xFFFF;
1571 gctx->starttime = time_second;
1572
1573 /*
1574 * If ROOTDEVNAME is defined or vfs.root.mountfrom is set then we have
1575 * root-path overrides that can potentially let us boot even if we don't
1576 * get a root path from the server, so we can treat that as a non-error.
1577 */
1578#ifdef ROOTDEVNAME
1579 gctx->any_root_overrides = 1;
1580#else
1581 gctx->any_root_overrides = testenv("vfs.root.mountfrom");
1582#endif
1583
1584 /*
1585 * Find a network interface.
1586 */
1587 CURVNET_SET(TD_TO_VNET(td));
1588#ifdef BOOTP_WIRED_TO
1589 printf("%s: wired to interface '%s'\n", __func__,
1590 __XSTRING(BOOTP_WIRED_TO));
1591 allocifctx(gctx);
1592#else
1593 /*
1594 * Preallocate interface context storage, if another interface
1595 * attaches and wins the race, it won't be eligible for bootp.
1596 */
1597 ifcnt = 0;
1598 IFNET_RLOCK();
1599 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1600 if ((ifp->if_flags &
1601 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1602 IFF_BROADCAST)
1603 continue;
1604 switch (ifp->if_alloctype) {
1605 case IFT_ETHER:
1606 case IFT_FDDI:
1607 case IFT_ISO88025:
1608 break;
1609 default:
1610 continue;
1611 }
1612 ifcnt++;
1613 }
1614 IFNET_RUNLOCK();
1615 if (ifcnt == 0)
1616 panic("%s: no eligible interfaces", __func__);
1617 for (; ifcnt > 0; ifcnt--)
1618 allocifctx(gctx);
1619#endif
1620
1621retry:
1622 ifctx = STAILQ_FIRST(&gctx->interfaces);
1623 IFNET_RLOCK();
1624 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1625 if (ifctx == NULL)
1626 break;
1627#ifdef BOOTP_WIRED_TO
1628 if (strcmp(ifp->if_xname, __XSTRING(BOOTP_WIRED_TO)) != 0)
1629 continue;
1630#else
1631 if ((ifp->if_flags &
1632 (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
1633 IFF_BROADCAST)
1634 continue;
1635 switch (ifp->if_alloctype) {
1636 case IFT_ETHER:
1637 case IFT_FDDI:
1638 case IFT_ISO88025:
1639 break;
1640 default:
1641 continue;
1642 }
1643#endif
1644 strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
1645 sizeof(ifctx->ireq.ifr_name));
1646 ifctx->ifp = ifp;
1647
1648 /* Get HW address */
1649 sdl = NULL;
1650 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1651 if (ifa->ifa_addr->sa_family == AF_LINK) {
1652 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1653 if (sdl->sdl_type == IFT_ETHER)
1654 break;
1655 }
1656 if (sdl == NULL)
1657 panic("bootpc: Unable to find HW address for %s",
1658 ifctx->ireq.ifr_name);
1659 ifctx->sdl = sdl;
1660
1661 ifctx = STAILQ_NEXT(ifctx, next);
1662 }
1663 IFNET_RUNLOCK();
1664 CURVNET_RESTORE();
1665
1666 if (STAILQ_EMPTY(&gctx->interfaces) ||
1667 STAILQ_FIRST(&gctx->interfaces)->ifp == NULL) {
1668 if (timeout > 0) {
1669 pause("bootpc", delay);
1670 timeout -= delay;
1671 goto retry;
1672 }
1673#ifdef BOOTP_WIRED_TO
1674 panic("%s: Could not find interface specified "
1675 "by BOOTP_WIRED_TO: "
1676 __XSTRING(BOOTP_WIRED_TO), __func__);
1677#else
1678 panic("%s: no suitable interface", __func__);
1679#endif
1680 }
1681
1682 error = socreate(AF_INET, &bootp_so, SOCK_DGRAM, 0, td->td_ucred, td);
1683 if (error != 0)
1684 panic("%s: socreate, error=%d", __func__, error);
1685
1686 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1687 bootpc_fakeup_interface(ifctx, td);
1688
1689 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1690 bootpc_compose_query(ifctx, td);
1691
1692 error = bootpc_call(gctx, td);
1693 if (error != 0) {
1694 printf("BOOTP call failed\n");
1695 }
1696
1697 mountopts(&nd->root_args, NULL);
1698
1699 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1700 if (bootpc_ifctx_isresolved(ifctx) != 0)
1701 bootpc_decode_reply(nd, ifctx, gctx);
1702
1703#ifdef BOOTP_NFSROOT
1704 if (gctx->gotrootpath == 0 && gctx->any_root_overrides == 0)
1705 panic("bootpc: No root path offered");
1706#endif
1707
1708 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1709 bootpc_adjust_interface(ifctx, gctx, td);
1710
1711 soclose(bootp_so);
1712
1713 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1714 if (ifctx->gotrootpath != 0)
1715 break;
1716 if (ifctx == NULL) {
1717 STAILQ_FOREACH(ifctx, &gctx->interfaces, next)
1718 if (bootpc_ifctx_isresolved(ifctx) != 0)
1719 break;
1720 }
1721 if (ifctx == NULL)
1722 goto out;
1723
1724 if (gctx->gotrootpath != 0) {
1725
1726 setenv("boot.netif.name", ifctx->ifp->if_xname);
1727
1728 error = md_mount(&nd->root_saddr, nd->root_hostnam,
1729 nd->root_fh, &nd->root_fhsize,
1730 &nd->root_args, td);
1731 if (error != 0) {
1732 if (gctx->any_root_overrides == 0)
1733 panic("nfs_boot: mount root, error=%d", error);
1734 else
1735 goto out;
1736 }
1737 rootdevnames[0] = "nfs:";
1738#ifdef NFSCLIENT
1739 rootdevnames[1] = "oldnfs:";
1740#endif
1741 nfs_diskless_valid = 3;
1742 }
1743
1744 strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
1745 bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
1746 bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
1747 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
1748 ifctx->myaddr.sin_addr.s_addr |
1749 ~ ifctx->netmask.sin_addr.s_addr;
1750 bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
1751
1752out:
1753 while((ifctx = STAILQ_FIRST(&gctx->interfaces)) != NULL) {
1754 STAILQ_REMOVE_HEAD(&gctx->interfaces, next);
1755 free(ifctx, M_TEMP);
1756 }
1757 free(gctx, M_TEMP);
1758}
1759
1760/*
1761 * RPC: mountd/mount
1762 * Given a server pathname, get an NFS file handle.
1763 * Also, sets sin->sin_port to the NFS service port.
1764 */
1765static int
1766md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp, int *fhsizep,
1767 struct nfs_args *args, struct thread *td)
1768{
1769 struct mbuf *m;
1770 int error;
1771 int authunixok;
1772 int authcount;
1773 int authver;
1774
1775#define RPCPROG_MNT 100005
1776#define RPCMNT_VER1 1
1777#define RPCMNT_VER3 3
1778#define RPCMNT_MOUNT 1
1779#define AUTH_SYS 1 /* unix style (uid, gids) */
1780#define AUTH_UNIX AUTH_SYS
1781
1782 /* XXX honor v2/v3 flags in args->flags? */
1783#ifdef BOOTP_NFSV3
1784 /* First try NFS v3 */
1785 /* Get port number for MOUNTD. */
1786 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1787 &mdsin->sin_port, td);
1788 if (error == 0) {
1789 m = xdr_string_encode(path, strlen(path));
1790
1791 /* Do RPC to mountd. */
1792 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER3,
1793 RPCMNT_MOUNT, &m, NULL, td);
1794 }
1795 if (error == 0) {
1796 args->flags |= NFSMNT_NFSV3;
1797 } else {
1798#endif
1799 /* Fallback to NFS v2 */
1800
1801 /* Get port number for MOUNTD. */
1802 error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1803 &mdsin->sin_port, td);
1804 if (error != 0)
1805 return error;
1806
1807 m = xdr_string_encode(path, strlen(path));
1808
1809 /* Do RPC to mountd. */
1810 error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER1,
1811 RPCMNT_MOUNT, &m, NULL, td);
1812 if (error != 0)
1813 return error; /* message already freed */
1814
1815#ifdef BOOTP_NFSV3
1816 }
1817#endif
1818
1819 if (xdr_int_decode(&m, &error) != 0 || error != 0)
1820 goto bad;
1821
1822 if ((args->flags & NFSMNT_NFSV3) != 0) {
1823 if (xdr_int_decode(&m, fhsizep) != 0 ||
1824 *fhsizep > NFSX_V3FHMAX ||
1825 *fhsizep <= 0)
1826 goto bad;
1827 } else
1828 *fhsizep = NFSX_V2FH;
1829
1830 if (xdr_opaque_decode(&m, fhp, *fhsizep) != 0)
1831 goto bad;
1832
1833 if (args->flags & NFSMNT_NFSV3) {
1834 if (xdr_int_decode(&m, &authcount) != 0)
1835 goto bad;
1836 authunixok = 0;
1837 if (authcount < 0 || authcount > 100)
1838 goto bad;
1839 while (authcount > 0) {
1840 if (xdr_int_decode(&m, &authver) != 0)
1841 goto bad;
1842 if (authver == AUTH_UNIX)
1843 authunixok = 1;
1844 authcount--;
1845 }
1846 if (authunixok == 0)
1847 goto bad;
1848 }
1849
1850 /* Set port number for NFS use. */
1851 error = krpc_portmap(mdsin, NFS_PROG,
1852 (args->flags &
1853 NFSMNT_NFSV3) ? NFS_VER3 : NFS_VER2,
1854 &mdsin->sin_port, td);
1855
1856 goto out;
1857
1858bad:
1859 error = EBADRPC;
1860
1861out:
1862 m_freem(m);
1863 return error;
1864}
1865
1866SYSINIT(bootp_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, bootpc_init, NULL);
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