| Current Path : /sys/boot/i386/libi386/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/boot/i386/libi386/pxe.c |
/*-
* Copyright (c) 2000 Alfred Perlstein <alfred@freebsd.org>
* Copyright (c) 2000 Paul Saab <ps@freebsd.org>
* Copyright (c) 2000 John Baldwin <jhb@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/boot/i386/libi386/pxe.c 231035 2012-02-05 19:30:18Z sbruno $");
#include <stand.h>
#include <string.h>
#include <stdarg.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/udp.h>
#include <net.h>
#include <netif.h>
#include <nfsv2.h>
#include <iodesc.h>
#include <bootp.h>
#include <bootstrap.h>
#include "btxv86.h"
#include "pxe.h"
/*
* Allocate the PXE buffers statically instead of sticking grimy fingers into
* BTX's private data area. The scratch buffer is used to send information to
* the PXE BIOS, and the data buffer is used to receive data from the PXE BIOS.
*/
#define PXE_BUFFER_SIZE 0x2000
#define PXE_TFTP_BUFFER_SIZE 512
static char scratch_buffer[PXE_BUFFER_SIZE];
static char data_buffer[PXE_BUFFER_SIZE];
static pxenv_t *pxenv_p = NULL; /* PXENV+ */
static pxe_t *pxe_p = NULL; /* !PXE */
static BOOTPLAYER bootplayer; /* PXE Cached information. */
static int pxe_debug = 0;
static int pxe_sock = -1;
static int pxe_opens = 0;
void pxe_enable(void *pxeinfo);
static void (*pxe_call)(int func);
static void pxenv_call(int func);
static void bangpxe_call(int func);
static int pxe_init(void);
static int pxe_strategy(void *devdata, int flag, daddr_t dblk,
size_t size, char *buf, size_t *rsize);
static int pxe_open(struct open_file *f, ...);
static int pxe_close(struct open_file *f);
static void pxe_print(int verbose);
static void pxe_cleanup(void);
static void pxe_setnfshandle(char *rootpath);
static void pxe_perror(int error);
static int pxe_netif_match(struct netif *nif, void *machdep_hint);
static int pxe_netif_probe(struct netif *nif, void *machdep_hint);
static void pxe_netif_init(struct iodesc *desc, void *machdep_hint);
static int pxe_netif_get(struct iodesc *desc, void *pkt, size_t len,
time_t timeout);
static int pxe_netif_put(struct iodesc *desc, void *pkt, size_t len);
static void pxe_netif_end(struct netif *nif);
extern struct netif_stats pxe_st[];
extern u_int16_t __bangpxeseg;
extern u_int16_t __bangpxeoff;
extern void __bangpxeentry(void);
extern u_int16_t __pxenvseg;
extern u_int16_t __pxenvoff;
extern void __pxenventry(void);
struct netif_dif pxe_ifs[] = {
/* dif_unit dif_nsel dif_stats dif_private */
{0, 1, &pxe_st[0], 0}
};
struct netif_stats pxe_st[NENTS(pxe_ifs)];
struct netif_driver pxenetif = {
"pxenet",
pxe_netif_match,
pxe_netif_probe,
pxe_netif_init,
pxe_netif_get,
pxe_netif_put,
pxe_netif_end,
pxe_ifs,
NENTS(pxe_ifs)
};
struct netif_driver *netif_drivers[] = {
&pxenetif,
NULL
};
struct devsw pxedisk = {
"pxe",
DEVT_NET,
pxe_init,
pxe_strategy,
pxe_open,
pxe_close,
noioctl,
pxe_print,
pxe_cleanup
};
/*
* This function is called by the loader to enable PXE support if we
* are booted by PXE. The passed in pointer is a pointer to the
* PXENV+ structure.
*/
void
pxe_enable(void *pxeinfo)
{
pxenv_p = (pxenv_t *)pxeinfo;
pxe_p = (pxe_t *)PTOV(pxenv_p->PXEPtr.segment * 16 +
pxenv_p->PXEPtr.offset);
pxe_call = NULL;
}
/*
* return true if pxe structures are found/initialized,
* also figures out our IP information via the pxe cached info struct
*/
static int
pxe_init(void)
{
t_PXENV_GET_CACHED_INFO *gci_p;
int counter;
uint8_t checksum;
uint8_t *checkptr;
if(pxenv_p == NULL)
return (0);
/* look for "PXENV+" */
if (bcmp((void *)pxenv_p->Signature, S_SIZE("PXENV+"))) {
pxenv_p = NULL;
return (0);
}
/* make sure the size is something we can handle */
if (pxenv_p->Length > sizeof(*pxenv_p)) {
printf("PXENV+ structure too large, ignoring\n");
pxenv_p = NULL;
return (0);
}
/*
* do byte checksum:
* add up each byte in the structure, the total should be 0
*/
checksum = 0;
checkptr = (uint8_t *) pxenv_p;
for (counter = 0; counter < pxenv_p->Length; counter++)
checksum += *checkptr++;
if (checksum != 0) {
printf("PXENV+ structure failed checksum, ignoring\n");
pxenv_p = NULL;
return (0);
}
/*
* PXENV+ passed, so use that if !PXE is not available or
* the checksum fails.
*/
pxe_call = pxenv_call;
if (pxenv_p->Version >= 0x0200) {
for (;;) {
if (bcmp((void *)pxe_p->Signature, S_SIZE("!PXE"))) {
pxe_p = NULL;
break;
}
checksum = 0;
checkptr = (uint8_t *)pxe_p;
for (counter = 0; counter < pxe_p->StructLength;
counter++)
checksum += *checkptr++;
if (checksum != 0) {
pxe_p = NULL;
break;
}
pxe_call = bangpxe_call;
break;
}
}
printf("\nPXE version %d.%d, real mode entry point ",
(uint8_t) (pxenv_p->Version >> 8),
(uint8_t) (pxenv_p->Version & 0xFF));
if (pxe_call == bangpxe_call)
printf("@%04x:%04x\n",
pxe_p->EntryPointSP.segment,
pxe_p->EntryPointSP.offset);
else
printf("@%04x:%04x\n",
pxenv_p->RMEntry.segment, pxenv_p->RMEntry.offset);
gci_p = (t_PXENV_GET_CACHED_INFO *) scratch_buffer;
bzero(gci_p, sizeof(*gci_p));
gci_p->PacketType = PXENV_PACKET_TYPE_BINL_REPLY;
pxe_call(PXENV_GET_CACHED_INFO);
if (gci_p->Status != 0) {
pxe_perror(gci_p->Status);
pxe_p = NULL;
return (0);
}
bcopy(PTOV((gci_p->Buffer.segment << 4) + gci_p->Buffer.offset),
&bootplayer, gci_p->BufferSize);
return (1);
}
static int
pxe_strategy(void *devdata, int flag, daddr_t dblk, size_t size,
char *buf, size_t *rsize)
{
return (EIO);
}
static int
pxe_open(struct open_file *f, ...)
{
va_list args;
char *devname; /* Device part of file name (or NULL). */
char temp[FNAME_SIZE];
int error = 0;
int i;
va_start(args, f);
devname = va_arg(args, char*);
va_end(args);
/* On first open, do netif open, mount, etc. */
if (pxe_opens == 0) {
/* Find network interface. */
if (pxe_sock < 0) {
pxe_sock = netif_open(devname);
if (pxe_sock < 0) {
printf("pxe_open: netif_open() failed\n");
return (ENXIO);
}
if (pxe_debug)
printf("pxe_open: netif_open() succeeded\n");
}
if (rootip.s_addr == 0) {
/*
* Do a bootp/dhcp request to find out where our
* NFS/TFTP server is. Even if we dont get back
* the proper information, fall back to the server
* which brought us to life and a default rootpath.
*/
bootp(pxe_sock, BOOTP_PXE);
if (rootip.s_addr == 0)
rootip.s_addr = bootplayer.sip;
if (!rootpath[0])
strcpy(rootpath, PXENFSROOTPATH);
for (i = 0; rootpath[i] != '\0' && i < FNAME_SIZE; i++)
if (rootpath[i] == ':')
break;
if (i && i != FNAME_SIZE && rootpath[i] == ':') {
rootpath[i++] = '\0';
if (inet_addr(&rootpath[0]) != INADDR_NONE)
rootip.s_addr = inet_addr(&rootpath[0]);
bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1);
bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1);
}
printf("pxe_open: server addr: %s\n", inet_ntoa(rootip));
printf("pxe_open: server path: %s\n", rootpath);
printf("pxe_open: gateway ip: %s\n", inet_ntoa(gateip));
setenv("boot.netif.ip", inet_ntoa(myip), 1);
setenv("boot.netif.netmask", intoa(netmask), 1);
setenv("boot.netif.gateway", inet_ntoa(gateip), 1);
if (bootplayer.Hardware == ETHER_TYPE) {
sprintf(temp, "%6D", bootplayer.CAddr, ":");
setenv("boot.netif.hwaddr", temp, 1);
}
setenv("boot.nfsroot.server", inet_ntoa(rootip), 1);
setenv("boot.nfsroot.path", rootpath, 1);
setenv("dhcp.host-name", hostname, 1);
}
}
pxe_opens++;
f->f_devdata = &pxe_sock;
return (error);
}
static int
pxe_close(struct open_file *f)
{
#ifdef PXE_DEBUG
if (pxe_debug)
printf("pxe_close: opens=%d\n", pxe_opens);
#endif
/* On last close, do netif close, etc. */
f->f_devdata = NULL;
/* Extra close call? */
if (pxe_opens <= 0)
return (0);
pxe_opens--;
/* Not last close? */
if (pxe_opens > 0)
return(0);
#ifdef LOADER_NFS_SUPPORT
/* get an NFS filehandle for our root filesystem */
pxe_setnfshandle(rootpath);
#endif
if (pxe_sock >= 0) {
#ifdef PXE_DEBUG
if (pxe_debug)
printf("pxe_close: calling netif_close()\n");
#endif
netif_close(pxe_sock);
pxe_sock = -1;
}
return (0);
}
static void
pxe_print(int verbose)
{
if (pxe_call != NULL) {
if (*bootplayer.Sname == '\0') {
printf(" "IP_STR":%s\n",
IP_ARGS(htonl(bootplayer.sip)),
bootplayer.bootfile);
} else {
printf(" %s:%s\n", bootplayer.Sname,
bootplayer.bootfile);
}
}
return;
}
static void
pxe_cleanup(void)
{
#ifdef PXE_DEBUG
t_PXENV_UNLOAD_STACK *unload_stack_p =
(t_PXENV_UNLOAD_STACK *)scratch_buffer;
t_PXENV_UNDI_SHUTDOWN *undi_shutdown_p =
(t_PXENV_UNDI_SHUTDOWN *)scratch_buffer;
#endif
if (pxe_call == NULL)
return;
pxe_call(PXENV_UNDI_SHUTDOWN);
#ifdef PXE_DEBUG
if (pxe_debug && undi_shutdown_p->Status != 0)
printf("pxe_cleanup: UNDI_SHUTDOWN failed %x\n",
undi_shutdown_p->Status);
#endif
pxe_call(PXENV_UNLOAD_STACK);
#ifdef PXE_DEBUG
if (pxe_debug && unload_stack_p->Status != 0)
printf("pxe_cleanup: UNLOAD_STACK failed %x\n",
unload_stack_p->Status);
#endif
}
void
pxe_perror(int err)
{
return;
}
#ifdef LOADER_NFS_SUPPORT
/*
* Reach inside the libstand NFS code and dig out an NFS handle
* for the root filesystem.
*/
#ifdef OLD_NFSV2
struct nfs_iodesc {
struct iodesc *iodesc;
off_t off;
u_char fh[NFS_FHSIZE];
/* structure truncated here */
};
extern struct nfs_iodesc nfs_root_node;
extern int rpc_port;
static void
pxe_rpcmountcall()
{
struct iodesc *d;
int error;
if (!(d = socktodesc(pxe_sock)))
return;
d->myport = htons(--rpc_port);
d->destip = rootip;
if ((error = nfs_getrootfh(d, rootpath, nfs_root_node.fh)) != 0)
printf("NFS MOUNT RPC error: %d\n", error);
nfs_root_node.iodesc = d;
}
static void
pxe_setnfshandle(char *rootpath)
{
int i;
u_char *fh;
char buf[2 * NFS_FHSIZE + 3], *cp;
/*
* If NFS files were never opened, we need to do mount call
* ourselves. Use nfs_root_node.iodesc as flag indicating
* previous NFS usage.
*/
if (nfs_root_node.iodesc == NULL)
pxe_rpcmountcall();
fh = &nfs_root_node.fh[0];
buf[0] = 'X';
cp = &buf[1];
for (i = 0; i < NFS_FHSIZE; i++, cp += 2)
sprintf(cp, "%02x", fh[i]);
sprintf(cp, "X");
setenv("boot.nfsroot.nfshandle", buf, 1);
}
#else /* !OLD_NFSV2 */
#define NFS_V3MAXFHSIZE 64
struct nfs_iodesc {
struct iodesc *iodesc;
off_t off;
uint32_t fhsize;
u_char fh[NFS_V3MAXFHSIZE];
/* structure truncated */
};
extern struct nfs_iodesc nfs_root_node;
extern int rpc_port;
static void
pxe_rpcmountcall()
{
struct iodesc *d;
int error;
if (!(d = socktodesc(pxe_sock)))
return;
d->myport = htons(--rpc_port);
d->destip = rootip;
if ((error = nfs_getrootfh(d, rootpath, &nfs_root_node.fhsize,
nfs_root_node.fh)) != 0) {
printf("NFS MOUNT RPC error: %d\n", error);
nfs_root_node.fhsize = 0;
}
nfs_root_node.iodesc = d;
}
static void
pxe_setnfshandle(char *rootpath)
{
int i;
u_char *fh;
char buf[2 * NFS_V3MAXFHSIZE + 3], *cp;
/*
* If NFS files were never opened, we need to do mount call
* ourselves. Use nfs_root_node.iodesc as flag indicating
* previous NFS usage.
*/
if (nfs_root_node.iodesc == NULL)
pxe_rpcmountcall();
fh = &nfs_root_node.fh[0];
buf[0] = 'X';
cp = &buf[1];
for (i = 0; i < nfs_root_node.fhsize; i++, cp += 2)
sprintf(cp, "%02x", fh[i]);
sprintf(cp, "X");
setenv("boot.nfsroot.nfshandle", buf, 1);
sprintf(buf, "%d", nfs_root_node.fhsize);
setenv("boot.nfsroot.nfshandlelen", buf, 1);
}
#endif /* OLD_NFSV2 */
#endif /* LOADER_NFS_SUPPORT */
void
pxenv_call(int func)
{
#ifdef PXE_DEBUG
if (pxe_debug)
printf("pxenv_call %x\n", func);
#endif
bzero(&v86, sizeof(v86));
bzero(data_buffer, sizeof(data_buffer));
__pxenvseg = pxenv_p->RMEntry.segment;
__pxenvoff = pxenv_p->RMEntry.offset;
v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
v86.es = VTOPSEG(scratch_buffer);
v86.edi = VTOPOFF(scratch_buffer);
v86.addr = (VTOPSEG(__pxenventry) << 16) | VTOPOFF(__pxenventry);
v86.ebx = func;
v86int();
v86.ctl = V86_FLAGS;
}
void
bangpxe_call(int func)
{
#ifdef PXE_DEBUG
if (pxe_debug)
printf("bangpxe_call %x\n", func);
#endif
bzero(&v86, sizeof(v86));
bzero(data_buffer, sizeof(data_buffer));
__bangpxeseg = pxe_p->EntryPointSP.segment;
__bangpxeoff = pxe_p->EntryPointSP.offset;
v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
v86.edx = VTOPSEG(scratch_buffer);
v86.eax = VTOPOFF(scratch_buffer);
v86.addr = (VTOPSEG(__bangpxeentry) << 16) | VTOPOFF(__bangpxeentry);
v86.ebx = func;
v86int();
v86.ctl = V86_FLAGS;
}
time_t
getsecs()
{
time_t n = 0;
time(&n);
return n;
}
static int
pxe_netif_match(struct netif *nif, void *machdep_hint)
{
return 1;
}
static int
pxe_netif_probe(struct netif *nif, void *machdep_hint)
{
t_PXENV_UDP_OPEN *udpopen_p = (t_PXENV_UDP_OPEN *)scratch_buffer;
if (pxe_call == NULL)
return -1;
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;
}