wininet: Directly return error status from WriteFile implementations.

diff --git a/dlls/wininet/ftp.c b/dlls/wininet/ftp.c
index f0c3cbd..338f743 100644
--- a/dlls/wininet/ftp.c
+++ b/dlls/wininet/ftp.c

@@ -1156,7 +1156,7 @@
     return FTPFILE_ReadFile(hdr, buffers->lpvBuffer, buffers->dwBufferLength, &buffers->dwBufferLength);
 }
 
-static BOOL FTPFILE_WriteFile(object_header_t *hdr, const void *buffer, DWORD size, DWORD *written)
+static DWORD FTPFILE_WriteFile(object_header_t *hdr, const void *buffer, DWORD size, DWORD *written)
 {
     ftp_file_t *lpwh = (ftp_file_t*) hdr;
     int res;
@@ -1164,7 +1164,7 @@
     res = send(lpwh->nDataSocket, buffer, size, 0);
 
     *written = res>0 ? res : 0;
-    return res >= 0;
+    return res >= 0 ? ERROR_SUCCESS : sock_get_error(errno);
 }
 
 static void FTP_ReceiveRequestData(ftp_file_t *file, BOOL first_notif)

diff --git a/dlls/wininet/http.c b/dlls/wininet/http.c
index b23fc18..f2d09c1 100644
--- a/dlls/wininet/http.c
+++ b/dlls/wininet/http.c

@@ -2489,7 +2489,7 @@
     return res;
 }
 
-static BOOL HTTPREQ_WriteFile(object_header_t *hdr, const void *buffer, DWORD size, DWORD *written)
+static DWORD HTTPREQ_WriteFile(object_header_t *hdr, const void *buffer, DWORD size, DWORD *written)
 {
     DWORD res;
     http_request_t *lpwhr = (http_request_t*)hdr;
@@ -2500,11 +2500,9 @@
     res = NETCON_send(&lpwhr->netConnection, buffer, size, 0, (LPINT)written);
     if (res == ERROR_SUCCESS)
         lpwhr->dwBytesWritten += *written;
-    else
-        SetLastError(res);
 
     INTERNET_SendCallback(&lpwhr->hdr, lpwhr->hdr.dwContext, INTERNET_STATUS_REQUEST_SENT, written, sizeof(DWORD));
-    return res == ERROR_SUCCESS;
+    return res;
 }
 
 static void HTTPREQ_AsyncQueryDataAvailableProc(WORKREQUEST *workRequest)

diff --git a/dlls/wininet/internet.c b/dlls/wininet/internet.c
index 65bb3d2..c13f44a 100644
--- a/dlls/wininet/internet.c
+++ b/dlls/wininet/internet.c

@@ -1862,7 +1862,7 @@
 	DWORD dwNumOfBytesToWrite, LPDWORD lpdwNumOfBytesWritten)
 {
     object_header_t *lpwh;
-    BOOL retval = FALSE;
+    BOOL res;
 
     TRACE("(%p %p %d %p)\n", hFile, lpBuffer, dwNumOfBytesToWrite, lpdwNumOfBytesWritten);
 
@@ -1874,16 +1874,17 @@
     }
 
     if(lpwh->vtbl->WriteFile) {
-        retval = lpwh->vtbl->WriteFile(lpwh, lpBuffer, dwNumOfBytesToWrite, lpdwNumOfBytesWritten);
+        res = lpwh->vtbl->WriteFile(lpwh, lpBuffer, dwNumOfBytesToWrite, lpdwNumOfBytesWritten);
     }else {
         WARN("No Writefile method.\n");
-        SetLastError(ERROR_INVALID_HANDLE);
-        retval = FALSE;
+        res = ERROR_INVALID_HANDLE;
     }
 
     WININET_Release( lpwh );
 
-    return retval;
+    if(res != ERROR_SUCCESS)
+        SetLastError(res);
+    return res == ERROR_SUCCESS;
 }
 
 

diff --git a/dlls/wininet/internet.h b/dlls/wininet/internet.h
index f87e719..e1044e9 100644
--- a/dlls/wininet/internet.h
+++ b/dlls/wininet/internet.h

@@ -143,7 +143,7 @@
     DWORD (*ReadFile)(object_header_t*,void*,DWORD,DWORD*);
     DWORD (*ReadFileExA)(object_header_t*,INTERNET_BUFFERSA*,DWORD,DWORD_PTR);
     DWORD (*ReadFileExW)(object_header_t*,INTERNET_BUFFERSW*,DWORD,DWORD_PTR);
-    BOOL (*WriteFile)(object_header_t*,const void*,DWORD,DWORD*);
+    DWORD (*WriteFile)(object_header_t*,const void*,DWORD,DWORD*);
     DWORD (*QueryDataAvailable)(object_header_t*,DWORD*,DWORD,DWORD_PTR);
     DWORD (*FindNextFileW)(object_header_t*,void*);
 } object_vtbl_t;
@@ -443,6 +443,7 @@
 BOOL NETCON_query_data_available(WININET_NETCONNECTION *connection, DWORD *available);
 LPCVOID NETCON_GetCert(WININET_NETCONNECTION *connection);
 DWORD NETCON_set_timeout(WININET_NETCONNECTION *connection, BOOL send, int value);
+int sock_get_error(int);
 
 extern void URLCacheContainers_CreateDefaults(void);
 extern void URLCacheContainers_DeleteAll(void);

diff --git a/dlls/wininet/netconnection.c b/dlls/wininet/netconnection.c
index ca31d0e..64513ac 100644
--- a/dlls/wininet/netconnection.c
+++ b/dlls/wininet/netconnection.c

@@ -315,7 +315,7 @@
 }
 
 /* translate a unix error code into a winsock one */
-static int sock_get_error( int err )
+int sock_get_error( int err )
 {
 #if !defined(__MINGW32__) && !defined (_MSC_VER)
     switch (err)