Fix FATFS compiling

FATFS compiling is currently broken due to several reasons. This fixes:

* Bad parameter count for `WRENAME`
* Missing `WFFLUSH` define
* `WOLFSSH_STOREHANDLE` required for `WOLFSSH_FATFS` to work
* Conflict when `NO_FILESYSTEM` is defined for wolfSSL and
  `WOLFSSH_FATFS` is defined by wolfSSH
* Function called that can't be used with `WOLFSSH_FATFS`
* Functions defined but not used with `WOLFSSH_FATFS`
* Function parameters defined but not used

Author: LinuxJedi

src/wolfsftp.c

@@ -1479,7 +1479,8 @@ int wolfSSH_SFTP_read(WOLFSSH* ssh)
                             wolfSSH_SFTP_buffer_data(&state->buffer),
                             wolfSSH_SFTP_buffer_size(&state->buffer));
                     break;
-            #if !defined(_WIN32_WCE) && !defined(WOLFSSH_ZEPHYR)
+            #if !defined(_WIN32_WCE) && !defined(WOLFSSH_ZEPHYR) && \
+                !defined(WOLFSSH_FATFS)
                 case WOLFSSH_FTP_SETSTAT:
                     ret = wolfSSH_SFTP_RecvSetSTAT(ssh, state->reqId,
                             wolfSSH_SFTP_buffer_data(&state->buffer),
@@ -4685,6 +4686,9 @@ int SFTP_GetAttributes_Handle(WOLFSSH* ssh, byte* handle, int handleSz,
 static int SFTP_GetAttributes(void* fs, const char* fileName,
         WS_SFTP_FILEATRB* atr, byte noFollow, void* heap)
 {
+    (void) fs;
+    (void) noFollow;
+    (void) heap;
     FILINFO info;
     FRESULT ret;
     int sz = (int)WSTRLEN(fileName);
@@ -5191,7 +5195,7 @@ int wolfSSH_SFTP_RecvLSTAT(WOLFSSH* ssh, int reqId, byte* data, word32 maxSz)
 }
 
 #if !defined(USE_WINDOWS_API) && !defined(WOLFSSH_ZEPHYR) \
-    && !defined(WOLFSSH_SFTP_SETMODE)
+    && !defined(WOLFSSH_SFTP_SETMODE) && !defined(WOLFSSH_FATFS)
 /* Set the files mode
  * return WS_SUCCESS on success */
 static int SFTP_SetMode(void* fs, char* name, word32 mode) {
@@ -5204,7 +5208,7 @@ static int SFTP_SetMode(void* fs, char* name, word32 mode) {
 #endif
 
 #if !defined(USE_WINDOWS_API) && !defined(WOLFSSH_ZEPHYR) \
-    && !defined(WOLFSSH_SFTP_SETMODEHANDLE)
+    && !defined(WOLFSSH_SFTP_SETMODEHANDLE) && !defined(WOLFSSH_FATFS)
 /* Set the files mode
  * return WS_SUCCESS on success */
 static int SFTP_SetModeHandle(void* fs, WFD handle, word32 mode) {
@@ -5216,7 +5220,7 @@ static int SFTP_SetModeHandle(void* fs, WFD handle, word32 mode) {
 }
 #endif
 
-#if !defined(_WIN32_WCE) && !defined(WOLFSSH_ZEPHYR)
+#if !defined(_WIN32_WCE) && !defined(WOLFSSH_ZEPHYR) && !defined(WOLFSSH_FATFS)
 
 /* sets a files attributes
  * returns WS_SUCCESS on success */

wolfssh/port.h

@@ -101,7 +101,7 @@ extern "C" {
     #endif
 #endif /* !WOLFSSH_HANDLE */
 
-#ifdef NO_FILESYSTEM
+#if defined(NO_FILESYSTEM) && !defined(WOLFSSH_FATFS)
     #define WS_DELIM '/'
 #elif defined(WOLFSSL_NUCLEUS)
     #include "storage/nu_storage.h"
@@ -255,6 +255,7 @@ extern "C" {
     #define WSEEK_SET 0
     #define WSEEK_CUR 1
     #define WSEEK_END 2
+    #define WFFLUSH(s) ((void)(s))
     static inline int ff_fopen(WFILE** f, const char* filename,
             const char* mode)
     {
@@ -585,7 +586,8 @@ extern "C" {
 
 #if (defined(WOLFSSH_SFTP) || \
         defined(WOLFSSH_SCP) || defined(WOLFSSH_SSHD)) && \
-    !defined(NO_WOLFSSH_SERVER) && !defined(NO_FILESYSTEM)
+    !defined(NO_WOLFSSH_SERVER) && \
+    (!defined(NO_FILESYSTEM) || defined(WOLFSSH_FATFS))
 
     #ifndef SIZEOF_OFF_T
         /* if not using autoconf then make a guess on off_t size based on sizeof
@@ -1192,7 +1194,7 @@ extern "C" {
     #define WSTAT(fs,p,b) f_stat(p,b)
     #define WLSTAT(fs,p,b) f_stat(p,b)
     #define WREMOVE(fs,d) f_unlink((d))
-    #define WRENAME(fs,fd,o,n) f_rename((o),(n))
+    #define WRENAME(fs,o,n) f_rename((o),(n))
     #define WMKDIR(fs, p, m) f_mkdir(p)
     #define WFD int
 

wolfssh/settings.h

@@ -52,6 +52,10 @@ extern "C" {
     #define USE_WOLFSSH_MEMORY  /* default memory handlers */
 #endif /* WMALLOC_USER */
 
+/* SFTP requires storehandle when fatfs is in use */
+#ifdef WOLFSSH_FATFS
+    #define WOLFSSH_STOREHANDLE
+#endif
 
 #if defined (_WIN32)
     #define USE_WINDOWS_API