From 57bb1a6d4c49d7e133d12656b6925eb3bbbc9439 Mon Sep 17 00:00:00 2001
From: Joris Vink <joris@sanctorum.se>
Date: Sun, 10 Nov 2024 16:28:21 +0100
Subject: [PATCH] Handle ENOMEM under heaven-tx.

Under certain conditions ENOMEM can be returned on certain OS's
if it fails to grab an mbuf when doing a write on the tun device.

It is a transient error and we should not fatal() on it.
---
 src/heaven_tx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/heaven_tx.c b/src/heaven_tx.c
index acf3be0..6d9a23e 100644
--- a/src/heaven_tx.c
+++ b/src/heaven_tx.c
@@ -137,7 +137,7 @@ heaven_tx_send_packet(int fd, struct sanctum_packet *pkt)
 		if (sanctum_platform_tundev_write(fd, pkt) == -1) {
 			if (errno == EINTR)
 				continue;
-			if (errno == EIO)
+			if (errno == EIO || errno == ENOMEM)
 				break;
 			if (errno == EAGAIN || errno == EWOULDBLOCK)
 				break;