615 lines
18 KiB
C
615 lines
18 KiB
C
/*
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* RPC messages
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*
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* Copyright 2001-2002 Ove Kåven, TransGaming Technologies
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* Copyright 2004 Filip Navara
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* TODO:
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* - figure out whether we *really* got this right
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* - check for errors and throw exceptions
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winerror.h"
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#include "winreg.h"
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#include "rpc.h"
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#include "rpcndr.h"
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#include "rpcdcep.h"
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#include "wine/debug.h"
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#include "rpc_binding.h"
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#include "rpc_misc.h"
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#include "rpc_defs.h"
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#include "rpc_message.h"
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WINE_DEFAULT_DEBUG_CHANNEL(rpc);
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static DWORD RPCRT4_GetHeaderSize(RpcPktHdr *Header)
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{
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static const DWORD header_sizes[] = {
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sizeof(Header->request), 0, sizeof(Header->response),
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sizeof(Header->fault), 0, 0, 0, 0, 0, 0, 0, sizeof(Header->bind),
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sizeof(Header->bind_ack), sizeof(Header->bind_nack),
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0, 0, 0, 0, 0
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};
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ULONG ret = 0;
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if (Header->common.ptype < sizeof(header_sizes) / sizeof(header_sizes[0])) {
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ret = header_sizes[Header->common.ptype];
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if (ret == 0)
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FIXME("unhandled packet type\n");
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if (Header->common.flags & RPC_FLG_OBJECT_UUID)
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ret += sizeof(UUID);
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} else {
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TRACE("invalid packet type\n");
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}
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return ret;
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}
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static VOID RPCRT4_BuildCommonHeader(RpcPktHdr *Header, unsigned char PacketType,
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unsigned long DataRepresentation)
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{
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Header->common.rpc_ver = RPC_VER_MAJOR;
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Header->common.rpc_ver_minor = RPC_VER_MINOR;
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Header->common.ptype = PacketType;
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Header->common.drep[0] = LOBYTE(LOWORD(DataRepresentation));
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Header->common.drep[1] = HIBYTE(LOWORD(DataRepresentation));
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Header->common.drep[2] = LOBYTE(HIWORD(DataRepresentation));
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Header->common.drep[3] = HIBYTE(HIWORD(DataRepresentation));
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Header->common.auth_len = 0;
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Header->common.call_id = 1;
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Header->common.flags = 0;
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/* Flags and fragment length are computed in RPCRT4_Send. */
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}
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static RpcPktHdr *RPCRT4_BuildRequestHeader(unsigned long DataRepresentation,
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unsigned long BufferLength,
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unsigned short ProcNum,
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UUID *ObjectUuid)
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{
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RpcPktHdr *header;
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BOOL has_object;
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RPC_STATUS status;
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has_object = (ObjectUuid != NULL && !UuidIsNil(ObjectUuid, &status));
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header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
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sizeof(header->request) + (has_object ? sizeof(UUID) : 0));
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if (header == NULL) {
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return NULL;
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}
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RPCRT4_BuildCommonHeader(header, PKT_REQUEST, DataRepresentation);
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header->common.frag_len = sizeof(header->request);
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header->request.alloc_hint = BufferLength;
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header->request.context_id = 0;
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header->request.opnum = ProcNum;
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if (has_object) {
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header->common.flags |= RPC_FLG_OBJECT_UUID;
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header->common.frag_len += sizeof(UUID);
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memcpy(&header->request + 1, ObjectUuid, sizeof(UUID));
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}
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return header;
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}
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static RpcPktHdr *RPCRT4_BuildResponseHeader(unsigned long DataRepresentation,
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unsigned long BufferLength)
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{
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RpcPktHdr *header;
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header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->response));
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if (header == NULL) {
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return NULL;
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}
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RPCRT4_BuildCommonHeader(header, PKT_RESPONSE, DataRepresentation);
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header->common.frag_len = sizeof(header->response);
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header->response.alloc_hint = BufferLength;
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return header;
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}
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RpcPktHdr *RPCRT4_BuildFaultHeader(unsigned long DataRepresentation,
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RPC_STATUS Status)
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{
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RpcPktHdr *header;
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header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->fault));
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if (header == NULL) {
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return NULL;
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}
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RPCRT4_BuildCommonHeader(header, PKT_FAULT, DataRepresentation);
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header->common.frag_len = sizeof(header->fault);
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header->fault.status = Status;
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return header;
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}
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RpcPktHdr *RPCRT4_BuildBindHeader(unsigned long DataRepresentation,
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unsigned short MaxTransmissionSize,
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unsigned short MaxReceiveSize,
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RPC_SYNTAX_IDENTIFIER *AbstractId,
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RPC_SYNTAX_IDENTIFIER *TransferId)
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{
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RpcPktHdr *header;
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header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind));
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if (header == NULL) {
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return NULL;
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}
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RPCRT4_BuildCommonHeader(header, PKT_BIND, DataRepresentation);
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header->common.frag_len = sizeof(header->bind);
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header->bind.max_tsize = MaxTransmissionSize;
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header->bind.max_rsize = MaxReceiveSize;
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header->bind.num_elements = 1;
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header->bind.num_syntaxes = 1;
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memcpy(&header->bind.abstract, AbstractId, sizeof(RPC_SYNTAX_IDENTIFIER));
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memcpy(&header->bind.transfer, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
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return header;
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}
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RpcPktHdr *RPCRT4_BuildBindNackHeader(unsigned long DataRepresentation,
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unsigned char RpcVersion,
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unsigned char RpcVersionMinor)
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{
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RpcPktHdr *header;
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header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind_nack));
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if (header == NULL) {
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return NULL;
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}
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RPCRT4_BuildCommonHeader(header, PKT_BIND_NACK, DataRepresentation);
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header->common.frag_len = sizeof(header->bind_nack);
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header->bind_nack.protocols_count = 1;
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header->bind_nack.protocols[0].rpc_ver = RpcVersion;
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header->bind_nack.protocols[0].rpc_ver_minor = RpcVersionMinor;
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return header;
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}
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RpcPktHdr *RPCRT4_BuildBindAckHeader(unsigned long DataRepresentation,
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unsigned short MaxTransmissionSize,
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unsigned short MaxReceiveSize,
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LPSTR ServerAddress,
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unsigned long Result,
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unsigned long Reason,
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RPC_SYNTAX_IDENTIFIER *TransferId)
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{
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RpcPktHdr *header;
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unsigned long header_size;
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RpcAddressString *server_address;
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RpcResults *results;
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RPC_SYNTAX_IDENTIFIER *transfer_id;
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header_size = sizeof(header->bind_ack) + sizeof(RpcResults) +
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sizeof(RPC_SYNTAX_IDENTIFIER) + sizeof(RpcAddressString) +
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strlen(ServerAddress);
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header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, header_size);
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if (header == NULL) {
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return NULL;
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}
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RPCRT4_BuildCommonHeader(header, PKT_BIND_ACK, DataRepresentation);
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header->common.frag_len = header_size;
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header->bind_ack.max_tsize = MaxTransmissionSize;
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header->bind_ack.max_rsize = MaxReceiveSize;
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server_address = (RpcAddressString*)(&header->bind_ack + 1);
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server_address->length = strlen(ServerAddress) + 1;
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strcpy(server_address->string, ServerAddress);
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results = (RpcResults*)((ULONG_PTR)server_address + sizeof(RpcAddressString) + server_address->length - 1);
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results->num_results = 1;
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results->results[0].result = Result;
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results->results[0].reason = Reason;
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transfer_id = (RPC_SYNTAX_IDENTIFIER*)(results + 1);
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memcpy(transfer_id, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
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return header;
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}
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VOID RPCRT4_FreeHeader(RpcPktHdr *Header)
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{
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HeapFree(GetProcessHeap(), 0, Header);
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}
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static int rpcrt4_conn_write(RpcConnection *Connection,
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const void *buffer, unsigned int count)
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{
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DWORD dwWritten = 0;
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if (!WriteFile(Connection->conn, buffer, count, &dwWritten, NULL))
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return -1;
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return dwWritten;
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}
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/***********************************************************************
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* RPCRT4_Send (internal)
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*
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* Transmit a packet over connection in acceptable fragments.
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*/
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RPC_STATUS RPCRT4_Send(RpcConnection *Connection, RpcPktHdr *Header,
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void *Buffer, unsigned int BufferLength)
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{
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PUCHAR buffer_pos;
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DWORD hdr_size;
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LONG count;
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buffer_pos = Buffer;
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/* The packet building functions save the packet header size, so we can use it. */
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hdr_size = Header->common.frag_len;
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Header->common.flags |= RPC_FLG_FIRST;
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Header->common.flags &= ~RPC_FLG_LAST;
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while (!(Header->common.flags & RPC_FLG_LAST)) {
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/* decide if we need to split the packet into fragments */
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if ((BufferLength + hdr_size) <= Connection->MaxTransmissionSize) {
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Header->common.flags |= RPC_FLG_LAST;
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Header->common.frag_len = BufferLength + hdr_size;
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} else {
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Header->common.frag_len = Connection->MaxTransmissionSize;
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}
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/* transmit packet header */
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count = rpcrt4_conn_write(Connection, Header, hdr_size);
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if (count<0) {
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WARN("rpcrt4_conn_write failed\n");
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return RPC_S_PROTOCOL_ERROR;
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}
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/* fragment consisted of header only and is the last one */
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if (hdr_size == Header->common.frag_len &&
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Header->common.flags & RPC_FLG_LAST) {
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return RPC_S_OK;
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}
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/* send the fragment data */
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count = rpcrt4_conn_write(Connection, buffer_pos, Header->common.frag_len - hdr_size);
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if (count<0) {
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WARN("rpcrt4_conn_write failed\n");
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return RPC_S_PROTOCOL_ERROR;
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}
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buffer_pos += Header->common.frag_len - hdr_size;
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BufferLength -= Header->common.frag_len - hdr_size;
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Header->common.flags &= ~RPC_FLG_FIRST;
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}
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return RPC_S_OK;
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}
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/***********************************************************************
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* rpcrt4_conn_read (internal)
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*
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* Reads data from a connection
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*/
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int rpcrt4_conn_read(RpcConnection *Connection,
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void *buffer, unsigned int count)
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{
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DWORD dwRead = 0;
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if (!ReadFile(Connection->conn, buffer, count, &dwRead, NULL) &&
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(GetLastError() != ERROR_MORE_DATA))
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return -1;
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return dwRead;
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}
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/***********************************************************************
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* RPCRT4_Receive (internal)
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*
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* Receive a packet from connection and merge the fragments.
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*/
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RPC_STATUS RPCRT4_Receive(RpcConnection *Connection, RpcPktHdr **Header,
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PRPC_MESSAGE pMsg)
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{
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RPC_STATUS status;
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DWORD hdr_length;
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LONG dwRead;
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unsigned short first_flag;
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unsigned long data_length;
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unsigned long buffer_length;
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unsigned char *buffer_ptr;
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RpcPktCommonHdr common_hdr;
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*Header = NULL;
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TRACE("(%p, %p, %p)\n", Connection, Header, pMsg);
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/* read packet common header */
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dwRead = rpcrt4_conn_read(Connection, &common_hdr, sizeof(common_hdr));
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if (dwRead != sizeof(common_hdr)) {
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WARN("Short read of header, %ld/%d bytes\n", dwRead, sizeof(common_hdr));
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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/* verify if the header really makes sense */
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if (common_hdr.rpc_ver != RPC_VER_MAJOR ||
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common_hdr.rpc_ver_minor != RPC_VER_MINOR) {
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WARN("unhandled packet version\n");
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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hdr_length = RPCRT4_GetHeaderSize((RpcPktHdr*)&common_hdr);
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if (hdr_length == 0) {
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WARN("header length == 0\n");
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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*Header = HeapAlloc(GetProcessHeap(), 0, hdr_length);
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memcpy(*Header, &common_hdr, sizeof(common_hdr));
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/* read the rest of packet header */
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dwRead = rpcrt4_conn_read(Connection, &(*Header)->common + 1, hdr_length - sizeof(common_hdr));
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if (dwRead != hdr_length - sizeof(common_hdr)) {
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WARN("bad header length, %ld/%ld bytes\n", dwRead, hdr_length - sizeof(common_hdr));
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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/* read packet body */
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switch (common_hdr.ptype) {
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case PKT_RESPONSE:
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pMsg->BufferLength = (*Header)->response.alloc_hint;
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break;
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case PKT_REQUEST:
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pMsg->BufferLength = (*Header)->request.alloc_hint;
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break;
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default:
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pMsg->BufferLength = common_hdr.frag_len - hdr_length;
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}
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TRACE("buffer length = %u\n", pMsg->BufferLength);
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status = I_RpcGetBuffer(pMsg);
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if (status != RPC_S_OK) goto fail;
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first_flag = RPC_FLG_FIRST;
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buffer_length = 0;
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buffer_ptr = pMsg->Buffer;
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while (buffer_length < pMsg->BufferLength)
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{
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data_length = (*Header)->common.frag_len - hdr_length;
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if (((*Header)->common.flags & RPC_FLG_FIRST) != first_flag ||
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data_length + buffer_length > pMsg->BufferLength) {
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TRACE("invalid packet flags or buffer length\n");
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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if (data_length == 0) dwRead = 0; else
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dwRead = rpcrt4_conn_read(Connection, buffer_ptr, data_length);
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if (dwRead != data_length) {
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WARN("bad data length, %ld/%ld\n", dwRead, data_length);
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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/* when there is no more data left, it should be the last packet */
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if (buffer_length == pMsg->BufferLength &&
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((*Header)->common.flags & RPC_FLG_LAST) == 0) {
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WARN("no more data left, but not last packet\n");
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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buffer_length += data_length;
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if (buffer_length < pMsg->BufferLength) {
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TRACE("next header\n");
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/* read the header of next packet */
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dwRead = rpcrt4_conn_read(Connection, *Header, hdr_length);
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if (dwRead != hdr_length) {
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WARN("invalid packet header size (%ld)\n", dwRead);
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status = RPC_S_PROTOCOL_ERROR;
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goto fail;
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}
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buffer_ptr += data_length;
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first_flag = 0;
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}
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}
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/* success */
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status = RPC_S_OK;
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fail:
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if (status != RPC_S_OK && *Header) {
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RPCRT4_FreeHeader(*Header);
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*Header = NULL;
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}
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return status;
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}
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/***********************************************************************
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* I_RpcGetBuffer [RPCRT4.@]
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*/
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RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
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{
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TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
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/* FIXME: pfnAllocate? */
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pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
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TRACE("Buffer=%p\n", pMsg->Buffer);
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/* FIXME: which errors to return? */
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return pMsg->Buffer ? S_OK : E_OUTOFMEMORY;
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}
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/***********************************************************************
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* I_RpcFreeBuffer [RPCRT4.@]
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*/
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RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
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{
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TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
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/* FIXME: pfnFree? */
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HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
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pMsg->Buffer = NULL;
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return S_OK;
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}
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/***********************************************************************
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* I_RpcSend [RPCRT4.@]
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*/
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RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
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{
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RpcBinding* bind = (RpcBinding*)pMsg->Handle;
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RpcConnection* conn;
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RPC_CLIENT_INTERFACE* cif = NULL;
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RPC_SERVER_INTERFACE* sif = NULL;
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RPC_STATUS status;
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RpcPktHdr *hdr;
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TRACE("(%p)\n", pMsg);
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if (!bind) return RPC_S_INVALID_BINDING;
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if (bind->server) {
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sif = pMsg->RpcInterfaceInformation;
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if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
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status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
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&sif->InterfaceId);
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} else {
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cif = pMsg->RpcInterfaceInformation;
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if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
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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;
|
|
}
|