Convert bitfields to integers in a safe way.

[oweals/tinc.git] / lib / utils.c

diff --git a/lib/utils.c b/lib/utils.c
index 9552c5c0fda2e1a0654279fc15a40c90f0acc85f..02b7b3443e626c268bead9bff0bccd03f094b596 100644 (file)
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -1,7 +1,7 @@
 /*
     utils.c -- gathering of some stupid small functions
-    Copyright (C) 1999-2003 Ivo Timmermans <zarq@iname.com>
-                  2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+    Copyright (C) 1999-2005 Ivo Timmermans <zarq@iname.com>
+                  2000-2006 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -18,15 +18,10 @@
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
-#include "config.h"
+#include "system.h"
 
-#include <sys/types.h>
-#include <ctype.h>
-#include <string.h>
-
-#include <utils.h>
-#include <syslog.h>
-#include <xalloc.h>
+#include "../src/logger.h"
+#include "utils.h"
 
 #ifdef ENABLE_TRACING
 volatile int (cp_line[]) = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
@@ -34,7 +29,7 @@ volatile char (*cp_file[]) = {"?", "?", "?", "?", "?", "?", "?", "?", "?", "?",
 volatile int cp_index = 0;
 #endif
 
-char *hexadecimals = "0123456789ABCDEF";
+const char hexadecimals[] = "0123456789ABCDEF";
 
 int charhex2bin(char c)
 {
@@ -64,7 +59,7 @@ void bin2hex(char *src, char *dst, int length)
 #ifdef ENABLE_TRACING
 void cp_trace()
 {
-       syslog(LOG_DEBUG, "Checkpoint trace: %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d...",
+       logger(LOG_DEBUG, "Checkpoint trace: %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d <- %s:%d...",
                   cp_file[(cp_index + 15) % 16], cp_line[(cp_index + 15) % 16],
                   cp_file[(cp_index + 14) % 16], cp_line[(cp_index + 14) % 16],
                   cp_file[(cp_index + 13) % 16], cp_line[(cp_index + 13) % 16],
@@ -84,3 +79,31 @@ void cp_trace()
                );
 }
 #endif
+
+#if defined(HAVE_MINGW) || defined(HAVE_CYGWIN)
+#ifdef HAVE_CYGWIN
+#include <w32api/windows.h>
+#endif
+
+const char *winerror(int err) {
+       static char buf[1024], *newline;
+
+       if (!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+               NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, sizeof(buf), NULL)) {
+               strncpy(buf, _("(unable to format errormessage)"), sizeof(buf));
+       };
+
+       if((newline = strchr(buf, '\r')))
+               *newline = '\0';
+
+       return buf;
+}
+#endif
+
+unsigned int bitfield_to_int(void *bitfield, size_t size) {
+       unsigned int value = 0;
+       if(size > sizeof value)
+               size = sizeof value;
+       memcpy(&value, bitfield, size);
+       return value;
+}