Adding upstream version 1:0.5.47.upstream/1%0.5.47

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 160 insertions, 0 deletions

diff --git a/htp/htp_hooks.c b/htp/htp_hooks.c
new file mode 100644
index 0000000..37d0fd4
--- /dev/null
+++ b/htp/htp_hooks.c
@@ -0,0 +1,160 @@
+/***************************************************************************
+ * Copyright (c) 2009-2010 Open Information Security Foundation
+ * Copyright (c) 2010-2013 Qualys, 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:
+ * 
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+
+ * - 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.
+
+ * - Neither the name of the Qualys, Inc. 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.
+ ***************************************************************************/
+
+/**
+ * @file
+ * @author Ivan Ristic <ivanr@webkreator.com>
+ */
+
+#include "htp_config_auto.h"
+
+#include "htp_private.h"
+
+htp_hook_t *htp_hook_copy(const htp_hook_t *hook) {
+    if (hook == NULL) return NULL;
+
+    htp_hook_t *copy = htp_hook_create();
+    if (copy == NULL) return NULL;
+
+    for (size_t i = 0, n = htp_list_size(hook->callbacks); i < n; i++) {
+        htp_callback_t *callback = htp_list_get(hook->callbacks, i);
+        if (htp_hook_register(&copy, callback->fn) != HTP_OK) {
+            htp_hook_destroy(copy);
+            return NULL;
+        }
+    }
+
+    return copy;
+}
+
+htp_hook_t *htp_hook_create(void) {
+    htp_hook_t *hook = calloc(1, sizeof (htp_hook_t));
+    if (hook == NULL) return NULL;
+
+    hook->callbacks = (htp_list_array_t *) htp_list_array_create(4);
+    if (hook->callbacks == NULL) {
+        free(hook);
+        return NULL;
+    }
+
+    return hook;
+}
+
+void htp_hook_destroy(htp_hook_t *hook) {
+    if (hook == NULL) return;
+
+    for (size_t i = 0, n = htp_list_size(hook->callbacks); i < n; i++) {
+        free((htp_callback_t *) htp_list_get(hook->callbacks, i));
+    }
+
+    htp_list_array_destroy(hook->callbacks);
+
+    free(hook);
+}
+
+htp_status_t htp_hook_register(htp_hook_t **hook, const htp_callback_fn_t callback_fn) {
+    if (hook == NULL) return HTP_ERROR;
+
+    htp_callback_t *callback = calloc(1, sizeof (htp_callback_t));
+    if (callback == NULL) return HTP_ERROR;
+
+    callback->fn = callback_fn;
+
+    // Create a new hook if one does not exist
+    int hook_created = 0;
+
+    if (*hook == NULL) {
+        hook_created = 1;
+
+        *hook = htp_hook_create();
+        if (*hook == NULL) {
+            free(callback);
+            return HTP_ERROR;
+        }
+    }
+
+    // Add callback 
+    if (htp_list_array_push((*hook)->callbacks, callback) != HTP_OK) {
+        if (hook_created) {
+            free(*hook);
+        }
+
+        free(callback);
+
+        return HTP_ERROR;
+    }
+
+    return HTP_OK;
+}
+
+htp_status_t htp_hook_run_all(htp_hook_t *hook, void *user_data) {
+    if (hook == NULL) return HTP_OK;
+
+    // Loop through the registered callbacks, giving each a chance to run.
+    for (size_t i = 0, n = htp_list_size(hook->callbacks); i < n; i++) {
+        htp_callback_t *callback = htp_list_get(hook->callbacks, i);
+
+        htp_status_t rc = callback->fn(user_data);
+
+        // A hook can return HTP_OK to say that it did some work,
+        // or HTP_DECLINED to say that it did no work. Anything else
+        // is treated as an error.
+        if ((rc != HTP_OK) && (rc != HTP_DECLINED)) {
+            return rc;
+        }
+    }
+
+    return HTP_OK;
+}
+
+htp_status_t htp_hook_run_one(htp_hook_t *hook, void *user_data) {
+    if (hook == NULL) return HTP_DECLINED;
+
+    for (size_t i = 0, n = htp_list_size(hook->callbacks); i < n; i++) {
+        htp_callback_t *callback = htp_list_get(hook->callbacks, i);
+
+        htp_status_t rc = callback->fn(user_data);
+
+        // A hook can return HTP_DECLINED to say that it did no work,
+        // and we'll ignore that. If we see HTP_OK or anything else,
+        // we stop processing (because it was either a successful
+        // handling or an error).
+        if (rc != HTP_DECLINED) {
+            // Return HTP_OK or an error.
+            return rc;
+        }
+    }
+
+    // No hook wanted to process the callback.
+    return HTP_DECLINED;
+}