297 lines
8.4 KiB
C
297 lines
8.4 KiB
C
/*
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* RPC transport layer
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*
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* Copyright 2001 Ove Kåven, TransGaming Technologies
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* Copyright 2003 Mike Hearn
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* Copyright 2004 Filip Navara
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* Copyright 2006 Mike McCormack
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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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*/
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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 <assert.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winnls.h"
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#include "winerror.h"
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#include "winreg.h"
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#include "winternl.h"
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#include "wine/unicode.h"
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#include "rpc.h"
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#include "rpcndr.h"
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#include "wine/debug.h"
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#include "rpc_binding.h"
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#include "rpc_message.h"
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WINE_DEFAULT_DEBUG_CHANNEL(rpc);
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static struct protseq_ops *rpcrt4_get_protseq_ops(const char *protseq);
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static RPC_STATUS rpcrt4_connect_pipe(RpcConnection *Connection, LPCSTR pname)
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{
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TRACE("listening on %s\n", pname);
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Connection->conn = CreateNamedPipeA(pname, PIPE_ACCESS_DUPLEX,
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PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE,
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PIPE_UNLIMITED_INSTANCES,
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RPC_MAX_PACKET_SIZE, RPC_MAX_PACKET_SIZE, 5000, NULL);
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memset(&Connection->ovl, 0, sizeof(Connection->ovl));
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Connection->ovl.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
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if (ConnectNamedPipe(Connection->conn, &Connection->ovl))
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return RPC_S_OK;
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WARN("Couldn't ConnectNamedPipe (error was %ld)\n", GetLastError());
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if (GetLastError() == ERROR_PIPE_CONNECTED) {
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SetEvent(Connection->ovl.hEvent);
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return RPC_S_OK;
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}
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if (GetLastError() == ERROR_IO_PENDING) {
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/* FIXME: looks like we need to GetOverlappedResult here? */
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return RPC_S_OK;
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}
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return RPC_S_SERVER_UNAVAILABLE;
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}
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static RPC_STATUS rpcrt4_open_pipe(RpcConnection *Connection, LPCSTR pname, BOOL wait)
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{
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HANDLE conn;
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DWORD err, dwMode;
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TRACE("connecting to %s\n", pname);
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while (TRUE) {
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conn = CreateFileA(pname, GENERIC_READ|GENERIC_WRITE, 0, NULL,
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OPEN_EXISTING, 0, 0);
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if (conn != INVALID_HANDLE_VALUE) break;
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err = GetLastError();
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if (err == ERROR_PIPE_BUSY) {
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TRACE("connection failed, error=%lx\n", err);
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return RPC_S_SERVER_TOO_BUSY;
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}
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if (!wait)
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return RPC_S_SERVER_UNAVAILABLE;
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if (!WaitNamedPipeA(pname, NMPWAIT_WAIT_FOREVER)) {
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err = GetLastError();
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WARN("connection failed, error=%lx\n", err);
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return RPC_S_SERVER_UNAVAILABLE;
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}
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}
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/* success */
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memset(&Connection->ovl, 0, sizeof(Connection->ovl));
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/* pipe is connected; change to message-read mode. */
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dwMode = PIPE_READMODE_MESSAGE;
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SetNamedPipeHandleState(conn, &dwMode, NULL, NULL);
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Connection->ovl.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
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Connection->conn = conn;
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return RPC_S_OK;
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}
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static RPC_STATUS rpcrt4_ncalrpc_open(RpcConnection* Connection)
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{
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static LPCSTR prefix = "\\\\.\\pipe\\lrpc\\";
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RPC_STATUS r;
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LPSTR pname;
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/* already connected? */
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if (Connection->conn)
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return RPC_S_OK;
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/* protseq=ncalrpc: supposed to use NT LPC ports,
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* but we'll implement it with named pipes for now */
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pname = HeapAlloc(GetProcessHeap(), 0, strlen(prefix) + strlen(Connection->Endpoint) + 1);
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strcat(strcpy(pname, prefix), Connection->Endpoint);
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if (Connection->server)
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r = rpcrt4_connect_pipe(Connection, pname);
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else
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r = rpcrt4_open_pipe(Connection, pname, TRUE);
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HeapFree(GetProcessHeap(), 0, pname);
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return r;
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}
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static RPC_STATUS rpcrt4_ncacn_np_open(RpcConnection* Connection)
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{
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static LPCSTR prefix = "\\\\.";
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RPC_STATUS r;
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LPSTR pname;
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/* already connected? */
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if (Connection->conn)
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return RPC_S_OK;
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/* protseq=ncacn_np: named pipes */
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pname = HeapAlloc(GetProcessHeap(), 0, strlen(prefix) + strlen(Connection->Endpoint) + 1);
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strcat(strcpy(pname, prefix), Connection->Endpoint);
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if (Connection->server)
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r = rpcrt4_connect_pipe(Connection, pname);
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else
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r = rpcrt4_open_pipe(Connection, pname, FALSE);
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HeapFree(GetProcessHeap(), 0, pname);
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return r;
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}
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static HANDLE rpcrt4_conn_np_get_connect_event(RpcConnection *conn)
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{
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return conn->ovl.hEvent;
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}
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static RPC_STATUS rpcrt4_conn_np_handoff(RpcConnection *old_conn, RpcConnection *new_conn)
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{
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/* because of the way named pipes work, we'll transfer the connected pipe
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* to the child, then reopen the server binding to continue listening */
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new_conn->conn = old_conn->conn;
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new_conn->ovl = old_conn->ovl;
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old_conn->conn = 0;
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memset(&old_conn->ovl, 0, sizeof(old_conn->ovl));
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return RPCRT4_OpenConnection(old_conn);
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}
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static int rpcrt4_conn_np_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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static int rpcrt4_conn_np_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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static int rpcrt4_conn_np_close(RpcConnection *Connection)
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{
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if (Connection->conn) {
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FlushFileBuffers(Connection->conn);
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CloseHandle(Connection->conn);
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Connection->conn = 0;
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}
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if (Connection->ovl.hEvent) {
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CloseHandle(Connection->ovl.hEvent);
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Connection->ovl.hEvent = 0;
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}
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return 0;
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}
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struct protseq_ops protseq_list[] = {
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{ "ncacn_np",
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rpcrt4_ncalrpc_open,
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rpcrt4_conn_np_get_connect_event,
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rpcrt4_conn_np_handoff,
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rpcrt4_conn_np_read,
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rpcrt4_conn_np_write,
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rpcrt4_conn_np_close,
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},
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{ "ncalrpc",
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rpcrt4_ncacn_np_open,
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rpcrt4_conn_np_get_connect_event,
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rpcrt4_conn_np_handoff,
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rpcrt4_conn_np_read,
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rpcrt4_conn_np_write,
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rpcrt4_conn_np_close,
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},
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};
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#define MAX_PROTSEQ (sizeof protseq_list / sizeof protseq_list[0])
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static struct protseq_ops *rpcrt4_get_protseq_ops(const char *protseq)
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{
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int i;
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for(i=0; i<MAX_PROTSEQ; i++)
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if (!strcmp(protseq_list[i].name, protseq))
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return &protseq_list[i];
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return NULL;
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}
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RPC_STATUS RPCRT4_OpenConnection(RpcConnection* Connection)
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{
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TRACE("(Connection == ^%p)\n", Connection);
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return Connection->ops->open_connection(Connection);
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}
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RPC_STATUS RPCRT4_CloseConnection(RpcConnection* Connection)
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{
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TRACE("(Connection == ^%p)\n", Connection);
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rpcrt4_conn_close(Connection);
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return RPC_S_OK;
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}
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RPC_STATUS RPCRT4_CreateConnection(RpcConnection** Connection, BOOL server, LPCSTR Protseq, LPCSTR NetworkAddr, LPCSTR Endpoint, LPCSTR NetworkOptions, RpcBinding* Binding)
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{
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struct protseq_ops *ops;
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RpcConnection* NewConnection;
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ops = rpcrt4_get_protseq_ops(Protseq);
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if (!ops)
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return RPC_S_PROTSEQ_NOT_SUPPORTED;
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NewConnection = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(RpcConnection));
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NewConnection->server = server;
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NewConnection->ops = ops;
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NewConnection->NetworkAddr = RPCRT4_strdupA(NetworkAddr);
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NewConnection->Endpoint = RPCRT4_strdupA(Endpoint);
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NewConnection->Used = Binding;
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NewConnection->MaxTransmissionSize = RPC_MAX_PACKET_SIZE;
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TRACE("connection: %p\n", NewConnection);
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*Connection = NewConnection;
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return RPC_S_OK;
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}
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RPC_STATUS RPCRT4_SpawnConnection(RpcConnection** Connection, RpcConnection* OldConnection)
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{
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RPC_STATUS err;
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err = RPCRT4_CreateConnection(Connection, OldConnection->server,
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rpcrt4_conn_get_name(OldConnection),
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OldConnection->NetworkAddr,
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OldConnection->Endpoint, NULL, NULL);
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if (err == RPC_S_OK)
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rpcrt4_conn_handoff(OldConnection, *Connection);
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return err;
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}
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RPC_STATUS RPCRT4_DestroyConnection(RpcConnection* Connection)
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{
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TRACE("connection: %p\n", Connection);
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RPCRT4_CloseConnection(Connection);
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RPCRT4_strfree(Connection->Endpoint);
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RPCRT4_strfree(Connection->NetworkAddr);
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HeapFree(GetProcessHeap(), 0, Connection);
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return RPC_S_OK;
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}
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