303 lines
9.4 KiB
C++
303 lines
9.4 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// pxe.cpp - Get files via PXE from SINGLDR
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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#include "pxe.h"
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#include "fnames.h"
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#pragma warning(disable: 4505) // Compiler generated constructor unreferenced
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//////////////////////////////////////////////////////////////////////////////
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//
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// Private Functions
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// The only way to talk to the hardware for PXE boot:
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void PxeCall(int16 api, LPVOID args)
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{
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if (s_fpPxenv) {
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__asm {
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mov bx, api;
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les di, args;
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call s_fpPxenv;
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}
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}
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else if (s_fpPxe) {
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(*s_fpPxe)(api, args);
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}
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}
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static uint32 parse_ip_addr(LPCHAR psz)
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{
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uint32 addr = 0;
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uint16 num = 0;
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for (; (*psz >= '0' && *psz <= '9') || *psz == '.'; psz++) {
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if (*psz >= '0' && *psz <= '9') {
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num = num * 10 + (*psz - '0');
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}
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else if (*psz == '.') {
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addr = (addr >> 8) + ((uint32)num << 24);
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num = 0;
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}
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}
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addr = (addr >> 8) + ((uint32)num << 24);
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return addr;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// Public Functions
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int PxeDevice::OpenDevice() __far
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{
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reply = (DHCP_PACKET __far *)alloc(1500, 4);
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// Get PXE Configuration.
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if (pxe->Signature[0] == '!' &&
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pxe->Signature[1] == 'P' &&
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pxe->Signature[2] == 'X' &&
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pxe->Signature[3] == 'E') {
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printf("PXE Signature : %c%c%c%c %d\n",
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pxe->Signature[0],
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pxe->Signature[1],
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pxe->Signature[2],
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pxe->Signature[3],
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pxe->StructRev);
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s_fpPxe = pxe->EntryPoint;
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}
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else if (pxenv->Signature[0] == 'P' &&
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pxenv->Signature[1] == 'X' &&
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pxenv->Signature[2] == 'E' &&
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pxenv->Signature[3] == 'N' &&
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pxenv->Signature[4] == 'V' &&
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pxenv->Signature[5] == '+')
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{
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printf("PXE Signature: %c%c%c%c%c%c version %d.%d\n",
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pxenv->Signature[0],
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pxenv->Signature[1],
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pxenv->Signature[2],
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pxenv->Signature[3],
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pxenv->Signature[4],
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pxenv->Signature[5],
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pxenv->Version >> 8,
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pxenv->Version&0xff);
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s_fpPxenv = pxenv->EntryPoint;
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}
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reply = (DHCP_PACKET __far *)alloc(1500, 4);
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CmdLine = (uint16 __far *)alloc(2048, 2);
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for (int j = 3; j > 0; j--) {
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CHAR szTemp[128]; // Needed so string is near pointer.
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PXENV_GET_CACHED_INFO pgci;
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pgci.PacketType = (UINT16)j; //CACHED_REPLY;
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pgci.Buffer = reply;
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pgci.BufferSize = 1500;
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pgci.BufferLimit = 1500;
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memzero(reply, 1500);
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printf(" PXE GetCachedInfo (Type=%d):\n", j);
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PxeCall(GET_CACHED_INFO, &pgci);
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if (pgci.Status != 0) {
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printf(" Error 0x%04x on request.\n", pgci.Status);
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continue;
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}
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printf(" client: %d.%d.%d.%d, dhcp: %d.%d.%d.%d, gate: %d.%d.%d.%d (%d bytes)\n",
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((uint8 __far *)&reply->yiaddr)[0],
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((uint8 __far *)&reply->yiaddr)[1],
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((uint8 __far *)&reply->yiaddr)[2],
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((uint8 __far *)&reply->yiaddr)[3],
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((uint8 __far *)&reply->siaddr)[0],
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((uint8 __far *)&reply->siaddr)[1],
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((uint8 __far *)&reply->siaddr)[2],
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((uint8 __far *)&reply->siaddr)[3],
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((uint8 __far *)&reply->giaddr)[0],
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((uint8 __far *)&reply->giaddr)[1],
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((uint8 __far *)&reply->giaddr)[2],
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((uint8 __far *)&reply->giaddr)[3],
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pgci.BufferSize);
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if (reply->sname[0] != '\0') {
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strcpy(szTemp, reply->sname);
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printf(" server: [%s]\n", szTemp);
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}
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if (reply->file[0] != '\0') {
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strcpy(szTemp, reply->file);
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printf(" file: [%s]\n", szTemp);
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}
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if (reply->cookie[0] == 0x63 &&
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reply->cookie[1] == 0x82 &&
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reply->cookie[2] == 0x53 &&
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reply->cookie[3] == 0x63) {
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DHCP_OPTIONS __far *options = &reply->options;
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DHCP_OPTIONS __far *optionsEnd
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= (DHCP_OPTIONS __far *)reply + pgci.BufferSize;
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while (options < optionsEnd) {
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if (options->Code == DHCP_OPTION_COOKIE_SERVERS) {
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uint16 __far * pwzCmdLine = CmdLine;
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for (int i = 0; i < options->Length; i++) {
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*pwzCmdLine++ = options->Data[i];
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}
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*pwzCmdLine++ = '\0';
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printf(" cmd: %s\n", CmdLine);
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break;
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}
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if (options->Code == 0) {
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options = (DHCP_OPTIONS __far *)(((CHAR __far *)options) + 1);
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}
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else {
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options = (DHCP_OPTIONS __far *)(((CHAR __far *)options)
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+ options->Length + 2);
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}
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}
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}
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else {
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printf(" cookie: %02x %02x %02x %02x\n",
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reply->cookie[0],
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reply->cookie[1],
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reply->cookie[2],
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reply->cookie[3]);
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}
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if (reply->sname[0] != '\0') {
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break;
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}
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}
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ServerIP = parse_ip_addr(reply->sname);
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return 0;
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}
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int PxeDevice::CloseDevice() __far
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{
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// create a packet that will fail
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PXENV_TFTP_GET_FSIZE ptfg;
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LPCHAR terminate = "end.:"; // request an invalid filename :)
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memzero(&ptfg, sizeof(ptfg));
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strcpy(ptfg.FileName, terminate);
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ptfg.Status = ~0u;
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ptfg.GatewayIpAddress = reply->giaddr;
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ptfg.ServerIpAddress = ServerIP;
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printf(" Size: %d.%d.%d.%d [%s] (to close)\n",
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((uint8 __far *)&ptfg.ServerIpAddress)[0],
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((uint8 __far *)&ptfg.ServerIpAddress)[1],
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((uint8 __far *)&ptfg.ServerIpAddress)[2],
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((uint8 __far *)&ptfg.ServerIpAddress)[3],
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ptfg.FileName);
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PxeCall(TFTP_GET_FSIZE, &ptfg);
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return 0;
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}
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int PxeDevice::GetFileProperties(LPCHAR /* filename */,
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FilePtr /* file */,
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FilePtr /* directory */) __far
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{
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// We could call PxeCall(TFTP_GET_FSIZE here, but some PXE
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// implementations fetch the entire file to determine its
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// size. Instead we rely on size information in Singboot.ini.
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#if DEPRECATED
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// consume leading '/' chars in filename
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LPCHAR fname = filename;
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while (fname[0]=='/') {
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fname++;
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}
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// build the message packet
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PXENV_TFTP_GET_FSIZE ptfg;
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memzero(&ptfg, sizeof(ptfg));
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FNameToCStr(fname, ptfg.FileName, sizeof(ptfg.FileName));
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ptfg.Status = ~0u;
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ptfg.GatewayIpAddress = reply->giaddr;
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ptfg.ServerIpAddress = ServerIP;
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PxeCall(TFTP_GET_FSIZE, &ptfg);
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if (ptfg.Status != 0) {
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printf("PXE: Size: %d.%d.%d.%d ",
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((uint8 __far *)&ptfg.ServerIpAddress)[0],
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((uint8 __far *)&ptfg.ServerIpAddress)[1],
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((uint8 __far *)&ptfg.ServerIpAddress)[2],
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((uint8 __far *)&ptfg.ServerIpAddress)[3]);
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PutFName(filename);
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printf("\n Error 0x%04x on request.\n", ptfg.Status);
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return -1;
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}
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// file->Size = ptfg.FileSize;
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#endif
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return 0;
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}
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INT16 PxeDevice::ReadFileLow(LPCHAR filename,
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FilePtr /* file */,
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uint8 __far * buffer) __far
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{
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// consume leading '/' chars
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LPCHAR fname = filename;
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while (fname[0] == '/') {
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fname++;
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}
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// build the message packet
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PXENV_TFTP_READ_FILE ptrf;
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memzero(&ptrf, sizeof(ptrf));
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strcpy(ptrf.FileName, fname);
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ptrf.Status = ~0u;
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ptrf.BufferSize = 0x8000;
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ptrf.Buffer = PointerToUint32(buffer);
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ptrf.GatewayIpAddress = reply->giaddr;
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ptrf.ServerIpAddress = ServerIP;
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PxeCall(TFTP_READ_FILE, &ptrf);
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if (ptrf.Status != 0) {
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printf("PXE: Loading low: %s", filename);
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printf("\n Error 0x%04x on request.\n", ptrf.Status);
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return -1;
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}
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return 0;
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}
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UINT32 PxeDevice::ReadFileHigh(LPCHAR filename,
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FilePtr file,
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uint32 destinationAddress,
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uint32 cbDestinationAddress) __far
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{
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// consume leading '/' chars
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LPCHAR fname = filename;
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while (fname[0] == '/') {
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fname++;
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}
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// build the message packet
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PXENV_TFTP_READ_FILE ptrf;
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memzero(&ptrf, sizeof(ptrf));
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FNameToCStr(fname, ptrf.FileName, sizeof(ptrf.FileName));
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ptrf.Status = ~0u;
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ptrf.BufferSize = cbDestinationAddress;
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ptrf.Buffer = destinationAddress;
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ptrf.GatewayIpAddress = reply->giaddr;
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ptrf.ServerIpAddress = ServerIP;
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PxeCall(TFTP_READ_FILE, &ptrf);
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if (ptrf.Status != 0) {
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printf("PXE: Loading high: %s", ptrf.FileName);
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printf("\n Error 0x%04x on request.\n", ptrf.Status);
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return -1;
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}
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return file->Size;
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}
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