Moved api examples to "ext" dir and hooked them into autotools for building with "--enable-extentions".

Upgraded to autoconf 2.65.
2025-09-29 11:16:33 +03:00 · 2010-05-05 23:00:48 +00:00
parent cea87f4085
commit 8553cab4a7
17 changed files with 244 additions and 156 deletions
--- a/ext/mod_tfn_reverse.c
+++ b/ext/mod_tfn_reverse.c
@@ -0,0 +1,89 @@
+
+#include "httpd.h"
+#include "http_core.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "http_protocol.h"
+#include "ap_config.h"
+#include "apr_optional.h"
+
+#include "modsecurity.h"
+
+/**
+ * This function will be invoked by
+ * ModSecurity to transform input.
+ */
+static int reverse(apr_pool_t *mptmp, unsigned char *input,
+    long int input_len, char **rval, long int *rval_len)
+{
+    /* Transformation functions can choose to do their
+     * thing in-place, overwriting the existing content. This
+     * is normally possible only if the transformed content
+     * is of equal length or shorter.
+     *
+     * If you need to expand the content use the temporary
+     * memory pool mptmp to allocate the space.
+     */
+
+    /* Reverse the string in place, but only if it's long enough. */
+    if (input_len > 1) {
+        long int i = 0;
+        long int j = input_len - 1;
+        while(i < j) {
+            char c = input[i];
+            input[i] = input[j];
+            input[j] = c;
+            i++;
+            j--;
+        }
+    }
+
+    /* Tell ModSecurity about the content
+     * we have generated. In this case we
+     * merely point back to the input buffer.
+     */
+    *rval = (char *)input;
+    *rval_len = input_len;
+
+    /* Must return 1 if the content was
+     * changed, or 0 otherwise.
+     */
+    return 1; 
+}
+
+static int hook_pre_config(apr_pool_t *mp, apr_pool_t *mp_log, apr_pool_t *mp_temp) {
+    void (*fn)(const char *name, void *fn);
+
+    /* Look for the registration function
+     * exported by ModSecurity.
+     */
+    fn = APR_RETRIEVE_OPTIONAL_FN(modsec_register_tfn);
+    if (fn) {
+        /* Use it to register our new
+         * transformation function under the
+         * name "reverse".
+         */
+        fn("reverse", (void *)reverse);
+    } else {
+        ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, 0, NULL,
+            "mod_tfn_reverse: Unable to find modsec_register_tfn.");
+    }
+
+    return OK;
+}
+
+static void register_hooks(apr_pool_t *p) {
+    ap_hook_pre_config(hook_pre_config, NULL, NULL, APR_HOOK_LAST);
+}
+
+/* Dispatch list for API hooks */
+module AP_MODULE_DECLARE_DATA tfn_reverse_module = {
+    STANDARD20_MODULE_STUFF, 
+    NULL,                  /* create per-dir    config structures */
+    NULL,                  /* merge  per-dir    config structures */
+    NULL,                  /* create per-server config structures */
+    NULL,                  /* merge  per-server config structures */
+    NULL,                  /* table of config file commands       */
+    register_hooks         /* register hooks                      */
+};
+