From: Guus Sliepen <guus@sliepen.org>
Date: Sat, 8 Feb 2020 14:59:41 +0000 (+0100)
Subject: Fix garbage being sent at start of UDP connection.
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=96b97ab1291e339a36952532db8ce72e7efc45a1;p=utcp

Fix garbage being sent at start of UDP connection.

If utcp_send() was called right after utcp_connect_ex(..., UTCP_UDP),
and the handshake phase hadn't completed yet, we left some garbage in
the send buffer which wasn't cleared until two more calls to utcp_send()
were made.
---

diff --git a/utcp.c b/utcp.c
index c57a5cc..5d63069 100644
--- a/utcp.c
+++ b/utcp.c
@@ -629,6 +629,8 @@ ssize_t utcp_send(struct utcp_connection *c, const void *data, size_t len) {
 
 	if(is_reliable(c) || (c->state != SYN_SENT && c->state != SYN_RECEIVED)) {
 		len = buffer_put(&c->sndbuf, data, len);
+	} else {
+		return 0;
 	}
 
 	if(len <= 0) {