ipsec_types: Add utility function to parse mark_t from strings

[strongswan.git] / src / libstrongswan / ipsec / ipsec_types.c

diff --git a/src/libstrongswan/ipsec/ipsec_types.c b/src/libstrongswan/ipsec/ipsec_types.c
index e4e9273..4bbd918 100644 (file)
--- a/src/libstrongswan/ipsec/ipsec_types.c
+++ b/src/libstrongswan/ipsec/ipsec_types.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Tobias Brunner
+ * Copyright (C) 2012-2013 Tobias Brunner
  * Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -36,3 +36,38 @@ ENUM(ipcomp_transform_names, IPCOMP_NONE, IPCOMP_LZJH,
        "IPCOMP_LZS",
        "IPCOMP_LZJH"
 );
+
+/*
+ * See header
+ */
+bool mark_from_string(const char *value, mark_t *mark)
+{
+       char *endptr;
+
+       if (!value)
+       {
+               return FALSE;
+       }
+       mark->value = strtoul(value, &endptr, 0);
+       if (*endptr)
+       {
+               if (*endptr != '/')
+               {
+                       DBG1(DBG_APP, "invalid mark value: %s", value);
+                       return FALSE;
+               }
+               mark->mask = strtoul(endptr+1, &endptr, 0);
+               if (*endptr)
+               {
+                       DBG1(DBG_LIB, "invalid mark mask: %s", endptr);
+                       return FALSE;
+               }
+       }
+       else
+       {
+               mark->mask = 0xffffffff;
+       }
+       /* apply the mask to ensure the value is in range */
+       mark->value &= mark->mask;
+       return TRUE;
+}