cmd: efidebug: add uri device path

[pandora-u-boot.git] / net / wget.c

diff --git a/net/wget.c b/net/wget.c
index 2087146..6ae2237 100644 (file)
--- a/net/wget.c
+++ b/net/wget.c
@@ -566,3 +566,74 @@ out:
        return ret;
 }
 #endif
+
+/**
+ * wget_validate_uri() - validate the uri for wget
+ *
+ * @uri:       uri string
+ *
+ * This function follows the current U-Boot wget implementation.
+ * scheme: only "http:" is supported
+ * authority:
+ *   - user information: not supported
+ *   - host: supported
+ *   - port: not supported(always use the default port)
+ *
+ * Uri is expected to be correctly percent encoded.
+ * This is the minimum check, control codes(0x1-0x19, 0x7F, except '\0')
+ * and space character(0x20) are not allowed.
+ *
+ * TODO: stricter uri conformance check
+ *
+ * Return:     true on success, false on failure
+ */
+bool wget_validate_uri(char *uri)
+{
+       char c;
+       bool ret = true;
+       char *str_copy, *s, *authority;
+
+       for (c = 0x1; c < 0x21; c++) {
+               if (strchr(uri, c)) {
+                       log_err("invalid character is used\n");
+                       return false;
+               }
+       }
+       if (strchr(uri, 0x7f)) {
+               log_err("invalid character is used\n");
+               return false;
+       }
+
+       if (strncmp(uri, "http://", 7)) {
+               log_err("only http:// is supported\n");
+               return false;
+       }
+       str_copy = strdup(uri);
+       if (!str_copy)
+               return false;
+
+       s = str_copy + strlen("http://");
+       authority = strsep(&s, "/");
+       if (!s) {
+               log_err("invalid uri, no file path\n");
+               ret = false;
+               goto out;
+       }
+       s = strchr(authority, '@');
+       if (s) {
+               log_err("user information is not supported\n");
+               ret = false;
+               goto out;
+       }
+       s = strchr(authority, ':');
+       if (s) {
+               log_err("user defined port is not supported\n");
+               ret = false;
+               goto out;
+       }
+
+out:
+       free(str_copy);
+
+       return ret;
+}