Enable TCP keepalive with half-hour idle

Since we swallow IRC PINGs, a client connection can go hours idle on a
quiet network. On my home internet, at least, these connections seem to
get silently dropped.

1 files changed, 4 insertions, 0 deletions

diff --git a/compat.h b/compat.h
index d471a8f..01ef10c 100644
--- a/compat.h
+++ b/compat.h
@@ -35,3 +35,7 @@ uint32_t arc4random_uniform(uint32_t upper_bound);
 #ifndef SIGINFO
 #define SIGINFO SIGUSR2
 #endif
+
+#ifdef __APPLE__
+#define TCP_KEEPIDLE TCP_KEEPALIVE
+#endif