cmd: efidebug: add uri device path

This adds the URI device path option for 'boot add' subcommand.
User can add the URI load option for downloading ISO image file
or EFI application through network. Currently HTTP is only supported.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

1 files changed, 71 insertions, 0 deletions

diff --git a/net/wget.c b/net/wget.c
index 2087146b377..6ae2237a0a8 100644
--- 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;
+}