From aad97d717a86b999c5ebf105131471550023dbc8 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@meshlink.io>
Date: Wed, 27 May 2020 21:02:22 +0200
Subject: [PATCH] Correctly report the maximum allowed send size in the poll
 callback for framed channels.

---
 src/utcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/utcp.c b/src/utcp.c
index cbc094a1..8ef59a06 100644
--- a/src/utcp.c
+++ b/src/utcp.c
@@ -2433,7 +2433,7 @@ struct timespec utcp_timeout(struct utcp *utcp) {
 		if(c->poll) {
 			if((c->state == ESTABLISHED || c->state == CLOSE_WAIT) && c->do_poll) {
 				c->do_poll = false;
-				uint32_t len = buffer_free(&c->sndbuf);
+				uint32_t len = is_framed(c) ? min(buffer_free(&c->sndbuf), MAX_UNRELIABLE_SIZE) : buffer_free(&c->sndbuf);
 
 				if(len) {
 					c->poll(c, len);
-- 
2.39.2