Reversed the logic for sockaddr_storage and made our own Curl_sockaddr_storage

struct instead to use.

lib/ftp.c

@@ -94,7 +94,7 @@
 #include "inet_ntop.h"
 #include "select.h"
 #include "parsedate.h" /* for the week day and month names */
-#include "sockaddr.h" /* required for sockaddr_storage */
+#include "sockaddr.h" /* required for Curl_sockaddr_storage */
 
 #if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
 #include "inet_ntoa_r.h"
@@ -778,7 +778,7 @@ static CURLcode ftp_state_use_port(struct connectdata *conn,
   /******************************************************************
    * IPv6-specific section
    */
-  struct sockaddr_storage ss;
+  struct Curl_sockaddr_storage ss;
   struct addrinfo *res, *ai;
   socklen_t sslen;
   char hbuf[NI_MAXHOST];

lib/sockaddr.h

@@ -26,11 +26,13 @@
 #include "setup.h"
 
 #ifndef HAVE_STRUCT_SOCKADDR_STORAGE
-struct sockaddr_storage
-  {
-    char buffer[256];   /* this should be big enough to fit a lot */
-  };
+struct Curl_sockaddr_storage {
+  struct sockaddr_storage buffer;
+}
+#else
+struct Curl_sockaddr_storage {
+  char buffer[256];   /* this should be big enough to fit a lot */
+};
 #endif
 
-
 #endif /* __SOCKADDR_H */

lib/tftp.c

@@ -75,7 +75,7 @@
 #include "progress.h"
 #include "connect.h"
 #include "strerror.h"
-#include "sockaddr.h" /* required for sockaddr_storage */
+#include "sockaddr.h" /* required for Curl_sockaddr_storage */
 
 #define _MPRINTF_REPLACE /* use our functions only */
 #include <curl/mprintf.h>
@@ -157,9 +157,9 @@ typedef struct tftp_state_data {
   time_t          start_time;
   time_t          max_time;
   unsigned short  block;
-  struct sockaddr_storage   local_addr;
+  struct Curl_sockaddr_storage   local_addr;
   socklen_t       local_addrlen;
-  struct sockaddr_storage   remote_addr;
+  struct Curl_sockaddr_storage   remote_addr;
   socklen_t       remote_addrlen;
   int             rbytes;
   int             sbytes;
@@ -598,7 +598,7 @@ CURLcode Curl_tftp(struct connectdata *conn, bool *done)
   tftp_event_t          event;
   CURLcode              code;
   int                   rc;
-  struct sockaddr_storage    fromaddr;
+  struct Curl_sockaddr_storage fromaddr;
   socklen_t             fromlen;
   int                   check_time = 0;