Merge branch 'jk/transfer-limit-protocol' into maint-2.3

1 files changed, 20 insertions, 1 deletions

diff --git a/transport.c b/transport.c
index 88bde1d85e..94fe8658f2 100644
--- a/transport.c
+++ b/transport.c
@@ -909,6 +909,20 @@ static int external_specification_len(const char *url)
 	return strchr(url, ':') - url;
 }
 
+void transport_check_allowed(const char *type)
+{
+	struct string_list allowed = STRING_LIST_INIT_DUP;
+	const char *v = getenv("GIT_ALLOW_PROTOCOL");
+
+	if (!v)
+		return;
+
+	string_list_split(&allowed, v, ':', -1);
+	if (!unsorted_string_list_has_string(&allowed, type))
+		die("transport '%s' not allowed", type);
+	string_list_clear(&allowed, 0);
+}
+
 struct transport *transport_get(struct remote *remote, const char *url)
 {
 	const char *helper;
@@ -940,12 +954,14 @@ struct transport *transport_get(struct remote *remote, const char *url)
 	if (helper) {
 		transport_helper_init(ret, helper);
 	} else if (starts_with(url, "rsync:")) {
+		transport_check_allowed("rsync");
 		ret->get_refs_list = get_refs_via_rsync;
 		ret->fetch = fetch_objs_via_rsync;
 		ret->push = rsync_transport_push;
 		ret->smart_options = NULL;
 	} else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 		struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
+		transport_check_allowed("file");
 		ret->data = data;
 		ret->get_refs_list = get_refs_from_bundle;
 		ret->fetch = fetch_refs_from_bundle;
@@ -957,7 +973,10 @@ struct transport *transport_get(struct remote *remote, const char *url)
 		|| starts_with(url, "ssh://")
 		|| starts_with(url, "git+ssh://")
 		|| starts_with(url, "ssh+git://")) {
-		/* These are builtin smart transports. */
+		/*
+		 * These are builtin smart transports; "allowed" transports
+		 * will be checked individually in git_connect.
+		 */
 		struct git_transport_data *data = xcalloc(1, sizeof(*data));
 		ret->data = data;
 		ret->set_option = NULL;