c83b0b621f
the terminating '\0'. Since the initialisation of rootpath in libstand/bootp.c may copy junk into the rest of the buffer, it was possible for the code to find a ':' after the '\0' and do the wrong thing. Reviewed by: ps MFC after: 1 week
611 lines
15 KiB
C
611 lines
15 KiB
C
/*
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* Copyright (c) 2000 Alfred Perlstein <alfred@freebsd.org>
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* All rights reserved.
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* Copyright (c) 2000 Paul Saab <ps@freebsd.org>
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* All rights reserved.
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* Copyright (c) 2000 John Baldwin <jhb@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <stand.h>
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#include <string.h>
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#include <stdarg.h>
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/udp.h>
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#include <net.h>
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#include <netif.h>
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#include <nfsv2.h>
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#include <iodesc.h>
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#include <bootp.h>
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#include <bootstrap.h>
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#include "btxv86.h"
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#include "pxe.h"
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/*
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* Allocate the PXE buffers statically instead of sticking grimy fingers into
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* BTX's private data area. The scratch buffer is used to send information to
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* the PXE BIOS, and the data buffer is used to receive data from the PXE BIOS.
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*/
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#define PXE_BUFFER_SIZE 0x2000
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#define PXE_TFTP_BUFFER_SIZE 512
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static char scratch_buffer[PXE_BUFFER_SIZE];
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static char data_buffer[PXE_BUFFER_SIZE];
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static pxenv_t *pxenv_p = NULL; /* PXENV+ */
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static pxe_t *pxe_p = NULL; /* !PXE */
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static BOOTPLAYER bootplayer; /* PXE Cached information. */
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static int pxe_debug = 0;
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static int pxe_sock = -1;
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static int pxe_opens = 0;
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void pxe_enable(void *pxeinfo);
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static void (*pxe_call)(int func);
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static void pxenv_call(int func);
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static void bangpxe_call(int func);
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static int pxe_init(void);
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static int pxe_strategy(void *devdata, int flag, daddr_t dblk,
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size_t size, char *buf, size_t *rsize);
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static int pxe_open(struct open_file *f, ...);
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static int pxe_close(struct open_file *f);
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static void pxe_print(int verbose);
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static void pxe_cleanup(void);
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static void pxe_setnfshandle(char *rootpath);
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static void pxe_perror(int error);
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static int pxe_netif_match(struct netif *nif, void *machdep_hint);
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static int pxe_netif_probe(struct netif *nif, void *machdep_hint);
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static void pxe_netif_init(struct iodesc *desc, void *machdep_hint);
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static int pxe_netif_get(struct iodesc *desc, void *pkt, size_t len,
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time_t timeout);
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static int pxe_netif_put(struct iodesc *desc, void *pkt, size_t len);
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static void pxe_netif_end(struct netif *nif);
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extern struct netif_stats pxe_st[];
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extern u_int16_t __bangpxeseg;
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extern u_int16_t __bangpxeoff;
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extern void __bangpxeentry(void);
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extern u_int16_t __pxenvseg;
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extern u_int16_t __pxenvoff;
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extern void __pxenventry(void);
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struct netif_dif pxe_ifs[] = {
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/* dif_unit dif_nsel dif_stats dif_private */
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{0, 1, &pxe_st[0], 0}
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};
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struct netif_stats pxe_st[NENTS(pxe_ifs)];
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struct netif_driver pxenetif = {
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"pxenet",
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pxe_netif_match,
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pxe_netif_probe,
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pxe_netif_init,
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pxe_netif_get,
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pxe_netif_put,
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pxe_netif_end,
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pxe_ifs,
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NENTS(pxe_ifs)
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};
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struct netif_driver *netif_drivers[] = {
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&pxenetif,
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NULL
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};
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struct devsw pxedisk = {
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"pxe",
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DEVT_NET,
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pxe_init,
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pxe_strategy,
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pxe_open,
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pxe_close,
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noioctl,
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pxe_print,
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pxe_cleanup
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};
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/*
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* This function is called by the loader to enable PXE support if we
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* are booted by PXE. The passed in pointer is a pointer to the
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* PXENV+ structure.
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*/
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void
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pxe_enable(void *pxeinfo)
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{
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pxenv_p = (pxenv_t *)pxeinfo;
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pxe_p = (pxe_t *)PTOV(pxenv_p->PXEPtr.segment * 16 +
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pxenv_p->PXEPtr.offset);
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pxe_call = NULL;
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}
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/*
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* return true if pxe structures are found/initialized,
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* also figures out our IP information via the pxe cached info struct
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*/
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static int
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pxe_init(void)
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{
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t_PXENV_GET_CACHED_INFO *gci_p;
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int counter;
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uint8_t checksum;
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uint8_t *checkptr;
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if(pxenv_p == NULL)
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return (0);
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/* look for "PXENV+" */
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if (bcmp((void *)pxenv_p->Signature, S_SIZE("PXENV+"))) {
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pxenv_p = NULL;
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return (0);
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}
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/* make sure the size is something we can handle */
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if (pxenv_p->Length > sizeof(*pxenv_p)) {
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printf("PXENV+ structure too large, ignoring\n");
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pxenv_p = NULL;
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return (0);
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}
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/*
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* do byte checksum:
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* add up each byte in the structure, the total should be 0
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*/
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checksum = 0;
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checkptr = (uint8_t *) pxenv_p;
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for (counter = 0; counter < pxenv_p->Length; counter++)
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checksum += *checkptr++;
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if (checksum != 0) {
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printf("PXENV+ structure failed checksum, ignoring\n");
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pxenv_p = NULL;
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return (0);
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}
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/*
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* PXENV+ passed, so use that if !PXE is not available or
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* the checksum fails.
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*/
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pxe_call = pxenv_call;
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if (pxenv_p->Version >= 0x0200) {
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for (;;) {
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if (bcmp((void *)pxe_p->Signature, S_SIZE("!PXE"))) {
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pxe_p = NULL;
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break;
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}
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checksum = 0;
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checkptr = (uint8_t *)pxe_p;
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for (counter = 0; counter < pxe_p->StructLength;
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counter++)
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checksum += *checkptr++;
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if (checksum != 0) {
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pxe_p = NULL;
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break;
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}
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pxe_call = bangpxe_call;
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break;
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}
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}
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printf("\nPXE version %d.%d, real mode entry point ",
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(uint8_t) (pxenv_p->Version >> 8),
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(uint8_t) (pxenv_p->Version & 0xFF));
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if (pxe_call == bangpxe_call)
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printf("@%04x:%04x\n",
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pxe_p->EntryPointSP.segment,
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pxe_p->EntryPointSP.offset);
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else
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printf("@%04x:%04x\n",
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pxenv_p->RMEntry.segment, pxenv_p->RMEntry.offset);
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gci_p = (t_PXENV_GET_CACHED_INFO *) scratch_buffer;
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bzero(gci_p, sizeof(*gci_p));
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gci_p->PacketType = PXENV_PACKET_TYPE_BINL_REPLY;
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pxe_call(PXENV_GET_CACHED_INFO);
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if (gci_p->Status != 0) {
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pxe_perror(gci_p->Status);
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pxe_p = NULL;
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return (0);
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}
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bcopy(PTOV((gci_p->Buffer.segment << 4) + gci_p->Buffer.offset),
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&bootplayer, gci_p->BufferSize);
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return (1);
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}
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static int
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pxe_strategy(void *devdata, int flag, daddr_t dblk, size_t size,
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char *buf, size_t *rsize)
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{
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return (EIO);
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}
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static int
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pxe_open(struct open_file *f, ...)
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{
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va_list args;
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char *devname; /* Device part of file name (or NULL). */
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char temp[FNAME_SIZE];
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int error = 0;
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int i;
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va_start(args, f);
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devname = va_arg(args, char*);
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va_end(args);
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/* On first open, do netif open, mount, etc. */
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if (pxe_opens == 0) {
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/* Find network interface. */
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if (pxe_sock < 0) {
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pxe_sock = netif_open(devname);
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if (pxe_sock < 0) {
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printf("pxe_open: netif_open() failed\n");
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return (ENXIO);
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}
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if (pxe_debug)
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printf("pxe_open: netif_open() succeeded\n");
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}
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if (rootip.s_addr == 0) {
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/*
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* Do a bootp/dhcp request to find out where our
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* NFS/TFTP server is. Even if we dont get back
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* the proper information, fall back to the server
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* which brought us to life and a default rootpath.
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*/
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bootp(pxe_sock, BOOTP_PXE);
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if (rootip.s_addr == 0)
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rootip.s_addr = bootplayer.sip;
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if (!rootpath[1])
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strcpy(rootpath, PXENFSROOTPATH);
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for (i = 0; rootpath[i] != '\0' && i < FNAME_SIZE; i++)
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if (rootpath[i] == ':')
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break;
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if (i && i != FNAME_SIZE && rootpath[i] == ':') {
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rootpath[i++] = '\0';
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if (inet_addr(&rootpath[0]) != INADDR_NONE)
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rootip.s_addr = inet_addr(&rootpath[0]);
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bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1);
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bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1);
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}
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printf("pxe_open: server addr: %s\n", inet_ntoa(rootip));
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printf("pxe_open: server path: %s\n", rootpath);
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printf("pxe_open: gateway ip: %s\n", inet_ntoa(gateip));
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setenv("boot.netif.ip", inet_ntoa(myip), 1);
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setenv("boot.netif.netmask", intoa(netmask), 1);
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setenv("boot.netif.gateway", inet_ntoa(gateip), 1);
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if (bootplayer.Hardware == ETHER_TYPE) {
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sprintf(temp, "%6D", bootplayer.CAddr, ":");
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setenv("boot.netif.hwaddr", temp, 1);
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}
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setenv("boot.nfsroot.server", inet_ntoa(rootip), 1);
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setenv("boot.nfsroot.path", rootpath, 1);
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}
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}
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pxe_opens++;
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f->f_devdata = &pxe_sock;
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return (error);
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}
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static int
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pxe_close(struct open_file *f)
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{
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#ifdef PXE_DEBUG
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if (pxe_debug)
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printf("pxe_close: opens=%d\n", pxe_opens);
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#endif
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/* On last close, do netif close, etc. */
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f->f_devdata = NULL;
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/* Extra close call? */
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if (pxe_opens <= 0)
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return (0);
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pxe_opens--;
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/* Not last close? */
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if (pxe_opens > 0)
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return(0);
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/* get an NFS filehandle for our root filesystem */
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pxe_setnfshandle(rootpath);
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if (pxe_sock >= 0) {
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#ifdef PXE_DEBUG
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if (pxe_debug)
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printf("pxe_close: calling netif_close()\n");
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#endif
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netif_close(pxe_sock);
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pxe_sock = -1;
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}
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return (0);
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}
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static void
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pxe_print(int verbose)
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{
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if (pxe_call != NULL) {
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if (*bootplayer.Sname == '\0') {
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printf(" "IP_STR":%s\n",
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IP_ARGS(htonl(bootplayer.sip)),
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bootplayer.bootfile);
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} else {
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printf(" %s:%s\n", bootplayer.Sname,
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bootplayer.bootfile);
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}
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}
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return;
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}
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static void
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pxe_cleanup(void)
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{
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#ifdef PXE_DEBUG
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t_PXENV_UNLOAD_STACK *unload_stack_p =
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(t_PXENV_UNLOAD_STACK *)scratch_buffer;
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t_PXENV_UNDI_SHUTDOWN *undi_shutdown_p =
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(t_PXENV_UNDI_SHUTDOWN *)scratch_buffer;
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#endif
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if (pxe_call == NULL)
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return;
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pxe_call(PXENV_UNDI_SHUTDOWN);
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#ifdef PXE_DEBUG
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if (pxe_debug && undi_shutdown_p->Status != 0)
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printf("pxe_cleanup: UNDI_SHUTDOWN failed %x\n",
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undi_shutdown_p->Status);
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#endif
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pxe_call(PXENV_UNLOAD_STACK);
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#ifdef PXE_DEBUG
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if (pxe_debug && unload_stack_p->Status != 0)
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printf("pxe_cleanup: UNLOAD_STACK failed %x\n",
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unload_stack_p->Status);
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#endif
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}
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void
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pxe_perror(int err)
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{
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return;
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}
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/*
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* Reach inside the libstand NFS code and dig out an NFS handle
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* for the root filesystem.
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*/
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struct nfs_iodesc {
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struct iodesc *iodesc;
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off_t off;
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u_char fh[NFS_FHSIZE];
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/* structure truncated here */
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};
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extern struct nfs_iodesc nfs_root_node;
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static void
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pxe_setnfshandle(char *rootpath)
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{
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int i;
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u_char *fh;
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char buf[2 * NFS_FHSIZE + 3], *cp;
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fh = &nfs_root_node.fh[0];
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buf[0] = 'X';
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cp = &buf[1];
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for (i = 0; i < NFS_FHSIZE; i++, cp += 2)
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sprintf(cp, "%02x", fh[i]);
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sprintf(cp, "X");
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setenv("boot.nfsroot.nfshandle", buf, 1);
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}
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void
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pxenv_call(int func)
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{
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#ifdef PXE_DEBUG
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if (pxe_debug)
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printf("pxenv_call %x\n", func);
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#endif
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bzero(&v86, sizeof(v86));
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bzero(data_buffer, sizeof(data_buffer));
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__pxenvseg = pxenv_p->RMEntry.segment;
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__pxenvoff = pxenv_p->RMEntry.offset;
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v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
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v86.es = VTOPSEG(scratch_buffer);
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v86.edi = VTOPOFF(scratch_buffer);
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v86.addr = (VTOPSEG(__pxenventry) << 16) | VTOPOFF(__pxenventry);
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v86.ebx = func;
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v86int();
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v86.ctl = V86_FLAGS;
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}
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void
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bangpxe_call(int func)
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{
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#ifdef PXE_DEBUG
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if (pxe_debug)
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printf("bangpxe_call %x\n", func);
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#endif
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bzero(&v86, sizeof(v86));
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bzero(data_buffer, sizeof(data_buffer));
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__bangpxeseg = pxe_p->EntryPointSP.segment;
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__bangpxeoff = pxe_p->EntryPointSP.offset;
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v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
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v86.edx = VTOPSEG(scratch_buffer);
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v86.eax = VTOPOFF(scratch_buffer);
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v86.addr = (VTOPSEG(__bangpxeentry) << 16) | VTOPOFF(__bangpxeentry);
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v86.ebx = func;
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v86int();
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v86.ctl = V86_FLAGS;
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}
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time_t
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getsecs()
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{
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time_t n = 0;
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time(&n);
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return n;
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}
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static int
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pxe_netif_match(struct netif *nif, void *machdep_hint)
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{
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return 1;
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}
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static int
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pxe_netif_probe(struct netif *nif, void *machdep_hint)
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{
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t_PXENV_UDP_OPEN *udpopen_p = (t_PXENV_UDP_OPEN *)scratch_buffer;
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if (pxe_call == NULL)
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return -1;
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|
|
|
bzero(udpopen_p, sizeof(*udpopen_p));
|
|
udpopen_p->src_ip = bootplayer.yip;
|
|
pxe_call(PXENV_UDP_OPEN);
|
|
|
|
if (udpopen_p->status != 0) {
|
|
printf("pxe_netif_probe: failed %x\n", udpopen_p->status);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
pxe_netif_end(struct netif *nif)
|
|
{
|
|
t_PXENV_UDP_CLOSE *udpclose_p = (t_PXENV_UDP_CLOSE *)scratch_buffer;
|
|
bzero(udpclose_p, sizeof(*udpclose_p));
|
|
|
|
pxe_call(PXENV_UDP_CLOSE);
|
|
if (udpclose_p->status != 0)
|
|
printf("pxe_end failed %x\n", udpclose_p->status);
|
|
}
|
|
|
|
static void
|
|
pxe_netif_init(struct iodesc *desc, void *machdep_hint)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 6; ++i)
|
|
desc->myea[i] = bootplayer.CAddr[i];
|
|
desc->xid = bootplayer.ident;
|
|
}
|
|
|
|
static int
|
|
pxe_netif_get(struct iodesc *desc, void *pkt, size_t len, time_t timeout)
|
|
{
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
pxe_netif_put(struct iodesc *desc, void *pkt, size_t len)
|
|
{
|
|
return len;
|
|
}
|
|
|
|
ssize_t
|
|
sendudp(struct iodesc *h, void *pkt, size_t len)
|
|
{
|
|
t_PXENV_UDP_WRITE *udpwrite_p = (t_PXENV_UDP_WRITE *)scratch_buffer;
|
|
bzero(udpwrite_p, sizeof(*udpwrite_p));
|
|
|
|
udpwrite_p->ip = h->destip.s_addr;
|
|
udpwrite_p->dst_port = h->destport;
|
|
udpwrite_p->src_port = h->myport;
|
|
udpwrite_p->buffer_size = len;
|
|
udpwrite_p->buffer.segment = VTOPSEG(pkt);
|
|
udpwrite_p->buffer.offset = VTOPOFF(pkt);
|
|
|
|
if (netmask == 0 || SAMENET(myip, h->destip, netmask))
|
|
udpwrite_p->gw = 0;
|
|
else
|
|
udpwrite_p->gw = gateip.s_addr;
|
|
|
|
pxe_call(PXENV_UDP_WRITE);
|
|
|
|
#if 0
|
|
/* XXX - I dont know why we need this. */
|
|
delay(1000);
|
|
#endif
|
|
if (udpwrite_p->status != 0) {
|
|
/* XXX: This happens a lot. It shouldn't. */
|
|
if (udpwrite_p->status != 1)
|
|
printf("sendudp failed %x\n", udpwrite_p->status);
|
|
return -1;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
ssize_t
|
|
readudp(struct iodesc *h, void *pkt, size_t len, time_t timeout)
|
|
{
|
|
t_PXENV_UDP_READ *udpread_p = (t_PXENV_UDP_READ *)scratch_buffer;
|
|
struct udphdr *uh = NULL;
|
|
|
|
uh = (struct udphdr *) pkt - 1;
|
|
bzero(udpread_p, sizeof(*udpread_p));
|
|
|
|
udpread_p->dest_ip = h->myip.s_addr;
|
|
udpread_p->d_port = h->myport;
|
|
udpread_p->buffer_size = len;
|
|
udpread_p->buffer.segment = VTOPSEG(data_buffer);
|
|
udpread_p->buffer.offset = VTOPOFF(data_buffer);
|
|
|
|
pxe_call(PXENV_UDP_READ);
|
|
|
|
#if 0
|
|
/* XXX - I dont know why we need this. */
|
|
delay(1000);
|
|
#endif
|
|
if (udpread_p->status != 0) {
|
|
/* XXX: This happens a lot. It shouldn't. */
|
|
if (udpread_p->status != 1)
|
|
printf("readudp failed %x\n", udpread_p->status);
|
|
return -1;
|
|
}
|
|
bcopy(data_buffer, pkt, udpread_p->buffer_size);
|
|
uh->uh_sport = udpread_p->s_port;
|
|
return udpread_p->buffer_size;
|
|
}
|