From: Guus Sliepen <guus@tinc-vpn.org>
Date: Mon, 22 Oct 2018 15:20:30 +0000 (+0200)
Subject: Prevent sptps_test from sending overly large UDP packets.
X-Git-Tag: release-1.1pre18~37
X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=c33dd41c07c4c4578f546798264b7f467d6a7866

Prevent sptps_test from sending overly large UDP packets.

This fixes the test suite on macOS, which has a lo0 interface with an MTU
of 16384, which is smaller than the maximum packet size we could send.
---

diff --git a/src/sptps_test.c b/src/sptps_test.c
index 0452b25c..ea81a28d 100644
--- a/src/sptps_test.c
+++ b/src/sptps_test.c
@@ -370,6 +370,7 @@ int main(int argc, char *argv[]) {
 		}
 
 		char buf[65535] = "";
+		size_t readsize = datagram ? 1460u : sizeof(buf);
 
 		fd_set fds;
 		FD_ZERO(&fds);
@@ -387,7 +388,7 @@ int main(int argc, char *argv[]) {
 		}
 
 		if(FD_ISSET(in, &fds)) {
-			ssize_t len = read(in, buf, sizeof(buf));
+			ssize_t len = read(in, buf, readsize);
 
 			if(len < 0) {
 				fprintf(stderr, "Could not read from stdin: %s\n", strerror(errno));