From 5d443bfa603d4a1bb728089342a40f15dd776418 Mon Sep 17 00:00:00 2001
From: Jim Ramsay <i.am@jimramsay.com>
Date: Wed, 21 Dec 2022 09:07:22 -0500
Subject: [PATCH] Improve error message for client receive buffer overflow

Signed-off-by: Jim Ramsay <i.am@jimramsay.com>
---
 src/ctl-client.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/ctl-client.c b/src/ctl-client.c
index 544a588..3d6847f 100644
--- a/src/ctl-client.c
+++ b/src/ctl-client.c
@@ -222,8 +222,13 @@ static json_t* json_from_buffer(struct ctl_client* self)
 	if (root) {
 		advance_read_buffer(&self->read_buffer, &self->read_len, err.position);
 	} else if (json_error_code(&err) == json_error_premature_end_of_input) {
-		DEBUG("Awaiting more data");
-		errno = ENODATA;
+		if (self->read_len == sizeof(self->read_buffer)) {
+			WARN("Response message is too long");
+			errno = EMSGSIZE;
+		} else {
+			DEBUG("Awaiting more data");
+			errno = ENODATA;
+		}
 	} else {
 		WARN("Json parsing failed: %s", err.text);
 		errno = EINVAL;