Adding upstream version 2.15.2.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/src/tld_index.c b/src/tld_index.c
new file mode 100644
index 0000000..6ac443c
--- /dev/null
+++ b/src/tld_index.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2008-2024 OARC, Inc.
+ * Copyright (c) 2007-2008, Internet Systems Consortium, Inc.
+ * Copyright (c) 2003-2007, The Measurement Factory, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include "tld_index.h"
+#include "xmalloc.h"
+#include "hashtbl.h"
+
+#include <string.h>
+
+static hashfunc   tld_hashfunc;
+static hashkeycmp tld_cmpfunc;
+
+#define MAX_ARRAY_SZ 65536
+static hashtbl* theHash  = NULL;
+static int      next_idx = 0;
+
+typedef struct
+{
+    char* tld;
+    int   index;
+} tldobj;
+
+int tld_indexer(const dns_message* m)
+{
+    const char* tld;
+    tldobj*     obj;
+    if (m->malformed)
+        return -1;
+    tld = dns_message_tld((dns_message*)m);
+    if (NULL == theHash) {
+        theHash = hash_create(MAX_ARRAY_SZ, tld_hashfunc, tld_cmpfunc, 1, afree, afree);
+        if (NULL == theHash)
+            return -1;
+    }
+    if ((obj = hash_find(tld, theHash)))
+        return obj->index;
+    obj = acalloc(1, sizeof(*obj));
+    if (NULL == obj)
+        return -1;
+    obj->tld = astrdup(tld);
+    if (NULL == obj->tld) {
+        afree(obj);
+        return -1;
+    }
+    obj->index = next_idx;
+    if (0 != hash_add(obj->tld, obj, theHash)) {
+        afree(obj->tld);
+        afree(obj);
+        return -1;
+    }
+    next_idx++;
+    return obj->index;
+}
+
+int tld_iterator(const char** label)
+{
+    tldobj*     obj;
+    static char label_buf[MAX_QNAME_SZ];
+    if (0 == next_idx)
+        return -1;
+    if (NULL == label) {
+        /* initialize and tell caller how big the array is */
+        hash_iter_init(theHash);
+        return next_idx;
+    }
+    if ((obj = hash_iterate(theHash)) == NULL)
+        return -1;
+    snprintf(label_buf, sizeof(label_buf), "%s", obj->tld);
+    *label = label_buf;
+    return obj->index;
+}
+
+void tld_reset()
+{
+    theHash  = NULL;
+    next_idx = 0;
+}
+
+static unsigned int
+tld_hashfunc(const void* key)
+{
+    return hashendian(key, strlen(key), 0);
+}
+
+static int
+tld_cmpfunc(const void* a, const void* b)
+{
+    return strcasecmp(a, b);
+}