From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Wed, 16 Oct 2019 16:56:14 +0000 (+0200)
Subject: Allow (and forward) zero-byte UDP packets.
X-Git-Tag: 1.4.3~2
X-Git-Url: https://git.sesse.net/?p=cubemap;a=commitdiff_plain;h=30e1ceef303dc02c0494f71774d0848485da4c8e;ds=sidebyside

Allow (and forward) zero-byte UDP packets.
---

diff --git a/udpinput.cpp b/udpinput.cpp
index a2915e8..4b421a3 100644
--- a/udpinput.cpp
+++ b/udpinput.cpp
@@ -210,7 +210,7 @@ void UDPInput::do_work()
 			ret = recv(sock, packet_buf, sizeof(packet_buf), 0);
 		} while (ret == -1 && errno == EINTR);
 
-		if (ret <= 0) {
+		if (ret < 0) {  // Note that zero-byte packets are legal.
 			log_perror("recv");
 			close_socket();
 			continue;