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Sweden-Number/dlls/rpcrt4/rpc_message.c

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/*
* RPC messages
*
* Copyright 2001-2002 Ove Kåven, TransGaming Technologies
* Copyright 2004 Filip Navara
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* TODO:
* - figure out whether we *really* got this right
* - check for errors and throw exceptions
*/
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winreg.h"
#include "rpc.h"
#include "rpcndr.h"
#include "rpcdcep.h"
#include "wine/debug.h"
#include "rpc_binding.h"
#include "rpc_misc.h"
#include "rpc_defs.h"
WINE_DEFAULT_DEBUG_CHANNEL(rpc);
DWORD RPCRT4_GetHeaderSize(RpcPktHdr *Header)
{
static const DWORD header_sizes[] = {
sizeof(Header->request), 0, sizeof(Header->response),
sizeof(Header->fault), 0, 0, 0, 0, 0, 0, 0, sizeof(Header->bind),
sizeof(Header->bind_ack), sizeof(Header->bind_nack),
0, 0, 0, 0, 0
};
ULONG ret = 0;
if (Header->common.ptype < sizeof(header_sizes) / sizeof(header_sizes[0])) {
ret = header_sizes[Header->common.ptype];
if (ret == 0)
FIXME("unhandled packet type\n");
if (Header->common.flags & RPC_FLG_OBJECT_UUID)
ret += sizeof(UUID);
} else {
TRACE("invalid packet type\n");
}
return ret;
}
VOID RPCRT4_BuildCommonHeader(RpcPktHdr *Header, unsigned char PacketType,
unsigned long DataRepresentation)
{
Header->common.rpc_ver = RPC_VER_MAJOR;
Header->common.rpc_ver_minor = RPC_VER_MINOR;
Header->common.ptype = PacketType;
Header->common.drep[0] = LOBYTE(LOWORD(DataRepresentation));
Header->common.drep[1] = HIBYTE(LOWORD(DataRepresentation));
Header->common.drep[2] = LOBYTE(HIWORD(DataRepresentation));
Header->common.drep[3] = HIBYTE(HIWORD(DataRepresentation));
Header->common.auth_len = 0;
Header->common.call_id = 1;
Header->common.flags = 0;
/* Flags and fragment length are computed in RPCRT4_Send. */
}
RpcPktHdr *RPCRT4_BuildRequestHeader(unsigned long DataRepresentation,
unsigned long BufferLength,
unsigned short ProcNum,
UUID *ObjectUuid)
{
RpcPktHdr *header;
BOOL has_object;
RPC_STATUS status;
has_object = (ObjectUuid != NULL && !UuidIsNil(ObjectUuid, &status));
header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
sizeof(header->request) + (has_object ? sizeof(UUID) : 0));
if (header == NULL) {
return NULL;
}
RPCRT4_BuildCommonHeader(header, PKT_REQUEST, DataRepresentation);
header->common.frag_len = sizeof(header->request);
header->request.alloc_hint = BufferLength;
header->request.context_id = 0;
header->request.opnum = ProcNum;
if (has_object) {
header->common.flags |= RPC_FLG_OBJECT_UUID;
header->common.frag_len += sizeof(UUID);
memcpy(&header->request + 1, ObjectUuid, sizeof(UUID));
}
return header;
}
RpcPktHdr *RPCRT4_BuildResponseHeader(unsigned long DataRepresentation,
unsigned long BufferLength)
{
RpcPktHdr *header;
header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->response));
if (header == NULL) {
return NULL;
}
RPCRT4_BuildCommonHeader(header, PKT_RESPONSE, DataRepresentation);
header->common.frag_len = sizeof(header->response);
header->response.alloc_hint = BufferLength;
return header;
}
RpcPktHdr *RPCRT4_BuildFaultHeader(unsigned long DataRepresentation,
RPC_STATUS Status)
{
RpcPktHdr *header;
header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->fault));
if (header == NULL) {
return NULL;
}
RPCRT4_BuildCommonHeader(header, PKT_FAULT, DataRepresentation);
header->common.frag_len = sizeof(header->fault);
header->fault.status = Status;
return header;
}
RpcPktHdr *RPCRT4_BuildBindHeader(unsigned long DataRepresentation,
unsigned short MaxTransmissionSize,
unsigned short MaxReceiveSize,
RPC_SYNTAX_IDENTIFIER *AbstractId,
RPC_SYNTAX_IDENTIFIER *TransferId)
{
RpcPktHdr *header;
header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind));
if (header == NULL) {
return NULL;
}
RPCRT4_BuildCommonHeader(header, PKT_BIND, DataRepresentation);
header->common.frag_len = sizeof(header->bind);
header->bind.max_tsize = MaxTransmissionSize;
header->bind.max_rsize = MaxReceiveSize;
header->bind.num_elements = 1;
header->bind.num_syntaxes = 1;
memcpy(&header->bind.abstract, AbstractId, sizeof(RPC_SYNTAX_IDENTIFIER));
memcpy(&header->bind.transfer, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
return header;
}
RpcPktHdr *RPCRT4_BuildBindNackHeader(unsigned long DataRepresentation,
unsigned char RpcVersion,
unsigned char RpcVersionMinor)
{
RpcPktHdr *header;
header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind_nack));
if (header == NULL) {
return NULL;
}
RPCRT4_BuildCommonHeader(header, PKT_BIND_NACK, DataRepresentation);
header->common.frag_len = sizeof(header->bind_nack);
header->bind_nack.protocols_count = 1;
header->bind_nack.protocols[0].rpc_ver = RpcVersion;
header->bind_nack.protocols[0].rpc_ver_minor = RpcVersionMinor;
return header;
}
RpcPktHdr *RPCRT4_BuildBindAckHeader(unsigned long DataRepresentation,
unsigned short MaxTransmissionSize,
unsigned short MaxReceiveSize,
LPSTR ServerAddress,
unsigned long Result,
unsigned long Reason,
RPC_SYNTAX_IDENTIFIER *TransferId)
{
RpcPktHdr *header;
unsigned long header_size;
RpcAddressString *server_address;
RpcResults *results;
RPC_SYNTAX_IDENTIFIER *transfer_id;
header_size = sizeof(header->bind_ack) + sizeof(RpcResults) +
sizeof(RPC_SYNTAX_IDENTIFIER) + sizeof(RpcAddressString) +
strlen(ServerAddress);
header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, header_size);
if (header == NULL) {
return NULL;
}
RPCRT4_BuildCommonHeader(header, PKT_BIND_ACK, DataRepresentation);
header->common.frag_len = header_size;
header->bind_ack.max_tsize = MaxTransmissionSize;
header->bind_ack.max_rsize = MaxReceiveSize;
server_address = (RpcAddressString*)(&header->bind_ack + 1);
server_address->length = strlen(ServerAddress) + 1;
strcpy(server_address->string, ServerAddress);
results = (RpcResults*)((ULONG_PTR)server_address + sizeof(RpcAddressString) + server_address->length - 1);
results->num_results = 1;
results->results[0].result = Result;
results->results[0].reason = Reason;
transfer_id = (RPC_SYNTAX_IDENTIFIER*)(results + 1);
memcpy(transfer_id, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
return header;
}
VOID RPCRT4_FreeHeader(RpcPktHdr *Header)
{
HeapFree(GetProcessHeap(), 0, Header);
}
/***********************************************************************
* RPCRT4_Send (internal)
*
* Transmit a packet over connection in acceptable fragments.
*/
RPC_STATUS RPCRT4_Send(RpcConnection *Connection, RpcPktHdr *Header,
void *Buffer, unsigned int BufferLength)
{
PUCHAR buffer_pos;
DWORD hdr_size, count;
buffer_pos = Buffer;
/* The packet building functions save the packet header size, so we can use it. */
hdr_size = Header->common.frag_len;
Header->common.flags |= RPC_FLG_FIRST;
Header->common.flags &= ~RPC_FLG_LAST;
while (!(Header->common.flags & RPC_FLG_LAST)) {
/* decide if we need to split the packet into fragments */
if ((BufferLength + hdr_size) <= Connection->MaxTransmissionSize) {
Header->common.flags |= RPC_FLG_LAST;
Header->common.frag_len = BufferLength + hdr_size;
} else {
Header->common.frag_len = Connection->MaxTransmissionSize;
buffer_pos += Header->common.frag_len - hdr_size;
BufferLength -= Header->common.frag_len - hdr_size;
}
/* transmit packet header */
if (!WriteFile(Connection->conn, Header, hdr_size, &count, NULL)) {
WARN("WriteFile failed with error %ld\n", GetLastError());
return GetLastError();
}
/* fragment consisted of header only and is the last one */
if (hdr_size == Header->common.frag_len &&
Header->common.flags & RPC_FLG_LAST) {
return RPC_S_OK;
}
/* send the fragment data */
if (!WriteFile(Connection->conn, buffer_pos, Header->common.frag_len - hdr_size, &count, NULL)) {
WARN("WriteFile failed with error %ld\n", GetLastError());
return GetLastError();
}
Header->common.flags &= ~RPC_FLG_FIRST;
}
return RPC_S_OK;
}
/***********************************************************************
* RPCRT4_Receive (internal)
*
* Receive a packet from connection and merge the fragments.
*/
RPC_STATUS RPCRT4_Receive(RpcConnection *Connection, RpcPktHdr **Header,
PRPC_MESSAGE pMsg)
{
RPC_STATUS status;
DWORD dwRead, hdr_length;
unsigned short first_flag;
unsigned long data_length;
unsigned long buffer_length;
unsigned char *buffer_ptr;
RpcPktCommonHdr common_hdr;
*Header = NULL;
TRACE("(%p, %p, %p)\n", Connection, Header, pMsg);
/* read packet common header */
if (!ReadFile(Connection->conn, &common_hdr, sizeof(common_hdr), &dwRead, NULL)) {
if (GetLastError() != ERROR_MORE_DATA) {
WARN("ReadFile failed with error %ld\n", GetLastError());
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
}
if (dwRead != sizeof(common_hdr)) {
WARN("Short read of header, %ld/%d bytes\n", dwRead, sizeof(common_hdr));
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
/* verify if the header really makes sense */
if (common_hdr.rpc_ver != RPC_VER_MAJOR ||
common_hdr.rpc_ver_minor != RPC_VER_MINOR) {
WARN("unhandled packet version\n");
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
hdr_length = RPCRT4_GetHeaderSize((RpcPktHdr*)&common_hdr);
if (hdr_length == 0) {
WARN("header length == 0\n");
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
*Header = HeapAlloc(GetProcessHeap(), 0, hdr_length);
memcpy(*Header, &common_hdr, sizeof(common_hdr));
/* read the rest of packet header */
if (!ReadFile(Connection->conn, &(*Header)->common + 1,
hdr_length - sizeof(common_hdr), &dwRead, NULL)) {
if (GetLastError() != ERROR_MORE_DATA) {
WARN("ReadFile failed with error %ld\n", GetLastError());
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
}
if (dwRead != hdr_length - sizeof(common_hdr)) {
WARN("bad header length, %ld/%ld bytes\n", dwRead, hdr_length - sizeof(common_hdr));
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
/* read packet body */
switch (common_hdr.ptype) {
case PKT_RESPONSE:
pMsg->BufferLength = (*Header)->response.alloc_hint;
break;
case PKT_REQUEST:
pMsg->BufferLength = (*Header)->request.alloc_hint;
break;
default:
pMsg->BufferLength = common_hdr.frag_len - hdr_length;
}
TRACE("buffer length = %u\n", pMsg->BufferLength);
status = I_RpcGetBuffer(pMsg);
if (status != RPC_S_OK) goto fail;
first_flag = RPC_FLG_FIRST;
buffer_length = 0;
buffer_ptr = pMsg->Buffer;
while (buffer_length < pMsg->BufferLength)
{
data_length = (*Header)->common.frag_len - hdr_length;
if (((*Header)->common.flags & RPC_FLG_FIRST) != first_flag ||
data_length + buffer_length > pMsg->BufferLength) {
TRACE("invalid packet flags or buffer length\n");
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
if (data_length == 0) dwRead = 0; else
if (!ReadFile(Connection->conn, buffer_ptr, data_length, &dwRead, NULL)) {
if (GetLastError() != ERROR_MORE_DATA) {
WARN("ReadFile failed with error %ld\n", GetLastError());
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
}
if (dwRead != data_length) {
WARN("bad data length, %ld/%ld\n", dwRead, data_length);
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
/* when there is no more data left, it should be the last packet */
if (buffer_length == pMsg->BufferLength &&
((*Header)->common.flags & RPC_FLG_LAST) == 0) {
WARN("no more data left, but not last packet\n");
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
buffer_length += data_length;
if (buffer_length < pMsg->BufferLength) {
TRACE("next header\n");
/* read the header of next packet */
if (!ReadFile(Connection->conn, *Header, hdr_length, &dwRead, NULL)) {
if (GetLastError() != ERROR_MORE_DATA) {
WARN("ReadFile failed with error %ld\n", GetLastError());
status = GetLastError();
goto fail;
}
}
if (dwRead != hdr_length) {
WARN("invalid packet header size (%ld)\n", dwRead);
status = RPC_S_PROTOCOL_ERROR;
goto fail;
}
buffer_ptr += data_length;
first_flag = 0;
}
}
/* success */
status = RPC_S_OK;
fail:
if (status != RPC_S_OK && *Header) {
RPCRT4_FreeHeader(*Header);
*Header = NULL;
}
return status;
}
/***********************************************************************
* I_RpcGetBuffer [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
{
RpcBinding* bind = (RpcBinding*)pMsg->Handle;
TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
/* FIXME: pfnAllocate? */
if (bind->server) {
/* it turns out that the original buffer data must still be available
* while the RPC server is marshalling a reply, so we should not deallocate
* it, we'll leave deallocating the original buffer to the RPC server */
pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
} else {
HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
}
TRACE("Buffer=%p\n", pMsg->Buffer);
/* FIXME: which errors to return? */
return pMsg->Buffer ? S_OK : E_OUTOFMEMORY;
}
/***********************************************************************
* I_RpcFreeBuffer [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
{
TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
/* FIXME: pfnFree? */
HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
pMsg->Buffer = NULL;
return S_OK;
}
/***********************************************************************
* I_RpcSend [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
{
RpcBinding* bind = (RpcBinding*)pMsg->Handle;
RpcConnection* conn;
RPC_CLIENT_INTERFACE* cif = NULL;
RPC_SERVER_INTERFACE* sif = NULL;
RPC_STATUS status;
RpcPktHdr *hdr;
TRACE("(%p)\n", pMsg);
if (!bind) return RPC_S_INVALID_BINDING;
if (bind->server) {
sif = pMsg->RpcInterfaceInformation;
if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
&sif->InterfaceId);
} else {
cif = pMsg->RpcInterfaceInformation;
if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
&cif->InterfaceId);
}
if (status != RPC_S_OK) return status;
if (bind->server) {
if (pMsg->RpcFlags & WINE_RPCFLAG_EXCEPTION) {
hdr = RPCRT4_BuildFaultHeader(pMsg->DataRepresentation,
RPC_S_CALL_FAILED);
} else {
hdr = RPCRT4_BuildResponseHeader(pMsg->DataRepresentation,
pMsg->BufferLength);
}
} else {
hdr = RPCRT4_BuildRequestHeader(pMsg->DataRepresentation,
pMsg->BufferLength, pMsg->ProcNum,
&bind->ObjectUuid);
}
status = RPCRT4_Send(conn, hdr, pMsg->Buffer, pMsg->BufferLength);
RPCRT4_FreeHeader(hdr);
/* success */
if (!bind->server) {
/* save the connection, so the response can be read from it */
pMsg->ReservedForRuntime = conn;
return RPC_S_OK;
}
RPCRT4_CloseBinding(bind, conn);
status = RPC_S_OK;
return status;
}
/***********************************************************************
* I_RpcReceive [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcReceive(PRPC_MESSAGE pMsg)
{
RpcBinding* bind = (RpcBinding*)pMsg->Handle;
RpcConnection* conn;
RPC_CLIENT_INTERFACE* cif = NULL;
RPC_SERVER_INTERFACE* sif = NULL;
RPC_STATUS status;
RpcPktHdr *hdr = NULL;
TRACE("(%p)\n", pMsg);
if (!bind) return RPC_S_INVALID_BINDING;
if (pMsg->ReservedForRuntime) {
conn = pMsg->ReservedForRuntime;
pMsg->ReservedForRuntime = NULL;
} else {
if (bind->server) {
sif = pMsg->RpcInterfaceInformation;
if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
&sif->InterfaceId);
} else {
cif = pMsg->RpcInterfaceInformation;
if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
&cif->InterfaceId);
}
if (status != RPC_S_OK) return status;
}
status = RPCRT4_Receive(conn, &hdr, pMsg);
if (status != RPC_S_OK) {
WARN("receive failed with error %lx\n", status);
goto fail;
}
status = RPC_S_PROTOCOL_ERROR;
switch (hdr->common.ptype) {
case PKT_RESPONSE:
if (bind->server) goto fail;
break;
case PKT_REQUEST:
if (!bind->server) goto fail;
break;
case PKT_FAULT:
pMsg->RpcFlags |= WINE_RPCFLAG_EXCEPTION;
ERR ("we got fault packet with status %lx\n", hdr->fault.status);
status = RPC_S_CALL_FAILED; /* ? */
goto fail;
default:
WARN("bad packet type %d\n", hdr->common.ptype);
goto fail;
}
/* success */
status = RPC_S_OK;
fail:
if (hdr) {
RPCRT4_FreeHeader(hdr);
}
RPCRT4_CloseBinding(bind, conn);
return status;
}
/***********************************************************************
* I_RpcSendReceive [RPCRT4.@]
*/
RPC_STATUS WINAPI I_RpcSendReceive(PRPC_MESSAGE pMsg)
{
RPC_STATUS status;
TRACE("(%p)\n", pMsg);
status = I_RpcSend(pMsg);
if (status == RPC_S_OK)
status = I_RpcReceive(pMsg);
return status;
}
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