gettimeofday: fix name space pollution

For systems without its own gettimeofday() implementation, we still must
not provide one outside our namespace.

Reported by: Bill Segall

src/misc.c

@@ -424,7 +424,7 @@ _libssh2_debug(LIBSSH2_SESSION * session, int context, const char *format, ...)
         }
     }
 
-    gettimeofday(&now, NULL);
+    _libssh2_gettimeofday(&now, NULL);
     if(!firstsec) {
         firstsec = now.tv_sec;
     }
@@ -563,16 +563,15 @@ void _libssh2_list_insert(struct list_node *after, /* insert before this */
 
 #endif
 
-
-
-#if defined(LIBSSH2_WIN32) && !defined(__MINGW32__)
+/* this define is defined in misc.h for the correct platforms */
+#ifdef LIBSSH2_GETTIMEOFDAY_WIN32
 /*
  * gettimeofday
  * Implementation according to:
  * The Open Group Base Specifications Issue 6
  * IEEE Std 1003.1, 2004 Edition
  */
-  
+
 /*
  *  THIS SOFTWARE IS NOT COPYRIGHTED
  *
@@ -591,9 +590,7 @@ void _libssh2_list_insert(struct list_node *after, /* insert before this */
 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 #define _W32_FT_OFFSET (116444736000000000)
 
-
-int __cdecl gettimeofday(struct timeval *tp,
-                         void *tzp)
+int __cdecl _libssh2_gettimeofday(struct timeval *tp, void *tzp)
  {
   union {
     unsigned __int64 ns100; /*time since 1 Jan 1601 in 100ns units */

src/misc.h

@@ -1,6 +1,6 @@
 #ifndef __LIBSSH2_MISC_H
 #define __LIBSSH2_MISC_H
-/* Copyright (c) 2009-2010 by Daniel Stenberg
+/* Copyright (c) 2009-2011 by Daniel Stenberg
  *
  * All rights reserved.
  *
@@ -78,4 +78,17 @@ void _libssh2_htonu32(unsigned char *buf, uint32_t val);
 void _libssh2_store_u32(unsigned char **buf, uint32_t value);
 void _libssh2_store_str(unsigned char **buf, const char *str, size_t len);
 
+#if defined(LIBSSH2_WIN32) && !defined(__MINGW32__)
+/* provide a private one */
+#undef HAVE_GETTIMEOFDAY
+int __cdecl _libssh2_gettimeofday(struct timeval *tp, void *tzp);
+#define HAVE_LIBSSH2_GETTIMEOFDAY
+#define LIBSSH2_GETTIMEOFDAY_WIN32 /* enable the win32 implementation */
+#else
+#ifdef HAVE_GETTIMEOFDAY
+#define _libssh2_gettimeofday(x,y) gettimeofday(x,y)
+#define HAVE_LIBSSH2_GETTIMEOFDAY
+#endif
+#endif
+
 #endif /* _LIBSSH2_MISC_H */

src/session.c

@@ -56,6 +56,7 @@
 #include "session.h"
 #include "channel.h"
 #include "mac.h"
+#include "misc.h"
 
 /* libssh2_default_alloc
  */
@@ -1573,13 +1574,13 @@ libssh2_poll(LIBSSH2_POLLFD * fds, unsigned int nfds, long timeout)
         }
 #ifdef HAVE_POLL
 
-#ifdef HAVE_GETTIMEOFDAY
+#ifdef HAVE_LIBSSH2_GETTIMEOFDAY
         {
             struct timeval tv_begin, tv_end;
 
-            gettimeofday((struct timeval *) &tv_begin, NULL);
+            _libssh2_gettimeofday((struct timeval *) &tv_begin, NULL);
             sysret = poll(sockets, nfds, timeout_remaining);
-            gettimeofday((struct timeval *) &tv_end, NULL);
+            _libssh2_gettimeofday((struct timeval *) &tv_end, NULL);
             timeout_remaining -= (tv_end.tv_sec - tv_begin.tv_sec) * 1000;
             timeout_remaining -= (tv_end.tv_usec - tv_begin.tv_usec) / 1000;
         }
@@ -1633,13 +1634,13 @@ libssh2_poll(LIBSSH2_POLLFD * fds, unsigned int nfds, long timeout)
 #elif defined(HAVE_SELECT)
         tv.tv_sec = timeout_remaining / 1000;
         tv.tv_usec = (timeout_remaining % 1000) * 1000;
-#ifdef HAVE_GETTIMEOFDAY
+#ifdef HAVE_LIBSSH2_GETTIMEOFDAY
         {
             struct timeval tv_begin, tv_end;
 
-            gettimeofday((struct timeval *) &tv_begin, NULL);
+            _libssh2_gettimeofday((struct timeval *) &tv_begin, NULL);
             sysret = select(maxfd+1, &rfds, &wfds, NULL, &tv);
-            gettimeofday((struct timeval *) &tv_end, NULL);
+            _libssh2_gettimeofday((struct timeval *) &tv_end, NULL);
 
             timeout_remaining -= (tv_end.tv_sec - tv_begin.tv_sec) * 1000;
             timeout_remaining -= (tv_end.tv_usec - tv_begin.tv_usec) / 1000;