480 lines
13 KiB
C
480 lines
13 KiB
C
/* $NetBSD: pxe.c,v 1.4 2002/03/26 08:02:05 kanaoka Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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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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/*
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* Support for the Intel Preboot Execution Environment (PXE).
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*
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* PXE provides a UDP implementation as well as a UNDI network device
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* driver. UNDI is much more complicated to use than PXE UDP, so we
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* use PXE UDP as a cheap and easy way to get PXE support.
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#ifdef _STANDALONE
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#include <lib/libkern/libkern.h>
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#else
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#include <string.h>
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#endif
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <net/if_ether.h>
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#include <lib/libsa/stand.h>
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#include <lib/libsa/net.h>
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#include <lib/libsa/netif.h>
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#include <lib/libsa/bootp.h>
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#include <libi386.h>
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#include <bootinfo.h>
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#include "pxeboot.h"
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#include "pxe.h"
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void (*pxe_call)(u_int16_t);
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void pxecall_bangpxe(u_int16_t); /* pxe_call.S */
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void pxecall_pxenv(u_int16_t); /* pxe_call.S */
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char pxe_command_buf[256];
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BOOTPLAYER bootplayer;
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/*****************************************************************************
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* This section is a replacement for libsa/udp.c
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*****************************************************************************/
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/* Caller must leave room for ethernet, ip, and udp headers in front!! */
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ssize_t
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sendudp(struct iodesc *d, void *pkt, size_t len)
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{
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t_PXENV_UDP_WRITE *uw = (void *) pxe_command_buf;
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uw->status = 0;
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uw->ip = d->destip.s_addr;
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uw->gw = gateip.s_addr;
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uw->src_port = d->myport;
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uw->dst_port = d->destport;
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uw->buffer_size = len;
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uw->buffer.segment = VTOPSEG(pkt);
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uw->buffer.offset = VTOPOFF(pkt);
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pxe_call(PXENV_UDP_WRITE);
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if (uw->status != PXENV_STATUS_SUCCESS) {
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/* XXX This happens a lot; it shouldn't. */
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if (uw->status != PXENV_STATUS_FAILURE)
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printf("sendudp: PXENV_UDP_WRITE failed: 0x%x\n",
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uw->status);
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return (-1);
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}
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return (len);
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}
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/*
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* Receive a UDP packet and validate it for us.
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* Caller leaves room for the headers (Ether, IP, UDP).
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*/
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ssize_t
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readudp(struct iodesc *d, void *pkt, size_t len, time_t tleft)
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{
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t_PXENV_UDP_READ *ur = (void *) pxe_command_buf;
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struct udphdr *uh;
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struct ip *ip;
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uh = (struct udphdr *)pkt - 1;
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ip = (struct ip *)uh - 1;
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bzero(ur, sizeof(*ur));
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ur->dest_ip = d->myip.s_addr;
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ur->d_port = d->myport;
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ur->buffer_size = len;
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ur->buffer.segment = VTOPSEG(pkt);
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ur->buffer.offset = VTOPOFF(pkt);
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/* XXX Timeout unused. */
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pxe_call(PXENV_UDP_READ);
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if (ur->status != PXENV_STATUS_SUCCESS) {
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/* XXX This happens a lot; it shouldn't. */
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if (ur->status != PXENV_STATUS_FAILURE)
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printf("readudp: PXENV_UDP_READ_failed: 0x%0x\n",
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ur->status);
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return (-1);
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}
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ip->ip_src.s_addr = ur->src_ip;
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uh->uh_sport = ur->s_port;
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uh->uh_dport = d->myport;
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return (len);
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}
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/*****************************************************************************
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* PXE "netif" back-end
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*****************************************************************************/
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int pxe_netif_match(struct netif *, void *);
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int pxe_netif_probe(struct netif *, void *);
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void pxe_netif_init(struct iodesc *, void *);
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int pxe_netif_get(struct iodesc *, void *, size_t, time_t);
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int pxe_netif_put(struct iodesc *, void *, size_t);
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void pxe_netif_end(struct netif *);
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struct netif_stats pxe_netif_stats;
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struct netif_dif pxe0_dif = {
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0, /* unit */
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1, /* nsel */
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&pxe_netif_stats,
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0,
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0,
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};
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struct netif_driver pxe_netif_driver = {
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"pxe", /* netif_bname */
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pxe_netif_match, /* match */
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pxe_netif_probe, /* probe */
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pxe_netif_init, /* init */
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pxe_netif_get, /* get */
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pxe_netif_put, /* put */
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pxe_netif_end, /* end */
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&pxe0_dif, /* netif_ifs */
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1, /* netif_nifs */
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};
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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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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 *uo = (void *) pxe_command_buf;
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pxe_init();
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if (pxe_call == NULL)
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return (1);
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bzero(uo, sizeof(*uo));
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uo->src_ip = bootplayer.yip;
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pxe_call(PXENV_UDP_OPEN);
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if (uo->status != PXENV_STATUS_SUCCESS) {
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printf("pxe_netif_probe: PXENV_UDP_OPEN failed: 0x%x\n",
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uo->status);
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pxe_fini();
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return (1);
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}
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return (0);
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}
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void
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pxe_netif_init(struct iodesc *desc, void *machdep_hint)
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{
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struct netif *nif = desc->io_netif;
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bcopy(bootplayer.CAddr, desc->myea, ETHER_ADDR_LEN);
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/*
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* Since the PXE BIOS has already done DHCP, make sure we
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* don't reuse any of its transaction IDs.
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*/
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desc->xid = bootplayer.ident;
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printf("%s%d: Ethernet address %s\n", nif->nif_driver->netif_bname,
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nif->nif_unit, ether_sprintf(desc->myea));
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}
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int
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pxe_netif_put(struct iodesc *desc, void *pkt, size_t len)
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{
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return (-1);
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}
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int
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pxe_netif_get(struct iodesc *desc, void *pkt, size_t len, time_t tleft)
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{
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return (-1);
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}
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void
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pxe_netif_end(struct netif *nif)
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{
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t_PXENV_UDP_CLOSE *uc = (void *) pxe_command_buf;
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uc->status = 0;
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pxe_call(PXENV_UDP_CLOSE);
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if (uc->status != PXENV_STATUS_SUCCESS)
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printf("pxe_netif_end: PXENV_UDP_CLOSE failed: 0x%x\n",
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uc->status);
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pxe_fini();
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}
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/*****************************************************************************
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* PXE initialization and support routines
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*****************************************************************************/
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u_int16_t pxe_command_buf_seg;
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u_int16_t pxe_command_buf_off;
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extern u_int16_t bangpxe_off, bangpxe_seg;
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extern u_int16_t pxenv_off, pxenv_seg;
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static struct btinfo_netif bi_netif;
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int
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pxe_init(void)
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{
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t_PXENV_GET_CACHED_INFO *gci = (void *) pxe_command_buf;
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t_PXENV_UNDI_GET_NIC_TYPE *gnt = (void *) pxe_command_buf;
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pxenv_t *pxenv;
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pxe_t *pxe;
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char *cp;
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int i;
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u_int8_t cksum, *ucp;
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/*
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* Checking for the presence of PXE is a machine-dependent
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* operation. On the IA-32, this can be done two ways:
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*
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* Int 0x1a function 0x5650
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*
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* Scan memory for the !PXE or PXENV+ signatures
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*
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* We do the latter, since the Int method returns a pointer
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* to a deprecated structure (PXENV+).
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*/
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pxenv = NULL;
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pxe = NULL;
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for (cp = (char *)0xa0000; cp > (char *)0x10000; cp -= 2) {
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if (pxenv == NULL) {
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pxenv = (pxenv_t *)cp;
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if (bcmp(pxenv->Signature, S_SIZE("PXENV+")))
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pxenv = NULL;
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else {
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for (i = 0, ucp = (u_int8_t *)cp, cksum = 0;
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i < pxenv->Length; i++)
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cksum += ucp[i];
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if (cksum != 0) {
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printf("pxe_init: bad cksum (0x%x) "
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"for PXENV+ at 0x%lx\n", cksum,
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(u_long) cp);
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pxenv = NULL;
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}
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}
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}
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if (pxe == NULL) {
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pxe = (pxe_t *)cp;
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if (bcmp(pxe->Signature, S_SIZE("!PXE")))
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pxe = NULL;
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else {
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for (i = 0, ucp = (u_int8_t *)cp, cksum = 0;
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i < pxe->StructLength; i++)
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cksum += ucp[i];
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if (cksum != 0) {
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printf("pxe_init: bad cksum (0x%x) "
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"for !PXE at 0x%lx\n", cksum,
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(u_long) cp);
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pxe = NULL;
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}
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}
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}
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if (pxe != NULL && pxenv != NULL)
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break;
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}
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if (pxe == NULL && pxenv == NULL) {
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printf("pxe_init: No PXE BIOS found.\n");
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return (1);
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}
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if (pxenv != NULL) {
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printf("PXE BIOS Version %d.%d\n",
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(pxenv->Version >> 8) & 0xff, pxenv->Version & 0xff);
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if (pxenv->Version >= 0x0201 && pxe != NULL) {
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/* 2.1 or greater -- don't use PXENV+ */
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pxenv = NULL;
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}
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}
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if (pxe != NULL) {
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pxe_call = pxecall_bangpxe;
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bangpxe_off = pxe->EntryPointSP.offset;
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bangpxe_seg = pxe->EntryPointSP.segment;
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} else {
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pxe_call = pxecall_pxenv;
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pxenv_off = pxenv->RMEntry.offset;
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pxenv_seg = pxenv->RMEntry.segment;
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}
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/*
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* Pre-compute the segment/offset of the pxe_command_buf
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* to make things nicer in the low-level calling glue.
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*/
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pxe_command_buf_seg = VTOPSEG(pxe_command_buf);
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pxe_command_buf_off = VTOPOFF(pxe_command_buf);
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/*
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* Get the cached info from the server's Discovery reply packet.
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*/
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bzero(gci, sizeof(*gci));
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gci->PacketType = PXENV_PACKET_TYPE_BINL_REPLY;
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pxe_call(PXENV_GET_CACHED_INFO);
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if (gci->Status != PXENV_STATUS_SUCCESS) {
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printf("pxe_init: PXENV_GET_CACHED_INFO failed: 0x%x\n",
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gci->Status);
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return (1);
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}
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pvbcopy((void *)((gci->Buffer.segment << 4) + gci->Buffer.offset),
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&bootplayer, gci->BufferSize);
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/*
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* Get network interface information.
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*/
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bzero(gnt, sizeof(*gnt));
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pxe_call(PXENV_UNDI_GET_NIC_TYPE);
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if (gnt->Status != PXENV_STATUS_SUCCESS) {
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printf("pxe_init: PXENV_UNDI_GET_NIC_TYPE failed: 0x%x\n",
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gnt->Status);
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return (0);
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}
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switch (gnt->NicType) {
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case PCI_NIC:
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case CardBus_NIC:
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strncpy(bi_netif.ifname, "pxe", sizeof(bi_netif.ifname));
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bi_netif.bus = BI_BUS_PCI;
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bi_netif.addr.tag = gnt->info.pci.BusDevFunc;
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BI_ADD(&bi_netif, BTINFO_NETIF, sizeof(bi_netif));
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printf("Using %s device at bus %d device %d function %d\n",
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gnt->NicType == PCI_NIC ? "PCI" : "CardBus",
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(gnt->info.pci.BusDevFunc >> 8) & 0xff,
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(gnt->info.pci.BusDevFunc >> 3) & 0x1f,
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gnt->info.pci.BusDevFunc & 0x7);
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break;
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case PnP_NIC:
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/* XXX Make bootinfo work with this. */
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printf("Using PnP device at 0x%x\n", gnt->info.pnp.CardSelNum);
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}
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return (0);
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}
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void
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pxe_fini(void)
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{
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t_PXENV_UNLOAD_STACK *unload = (void *) pxe_command_buf;
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t_PXENV_UNDI_SHUTDOWN *shutdown = (void *) pxe_command_buf;
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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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if (shutdown->Status != PXENV_STATUS_SUCCESS)
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printf("pxe_fini: PXENV_UNDI_SHUTDOWN failed: 0x%x\n",
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shutdown->Status);
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pxe_call(PXENV_UNLOAD_STACK);
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if (unload->Status != PXENV_STATUS_SUCCESS)
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printf("pxe_fini: PXENV_UNLOAD_STACK failed: 0x%x\n",
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unload->Status);
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}
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