From 0917b6335abfa70d0122e6a694dbb30225a2a73f Mon Sep 17 00:00:00 2001
From: Michael Tuexen <tuexen@fh-muenster.de>
Date: Thu, 25 Jan 2018 16:00:31 +0100
Subject: [PATCH] On FreeBSD the accept system call might return early.
When using TFO and the SYN carries user data, the sending of
the SYN-ACK is delayed and accept returns. This allows the
application to provide user data to be put in the SYN-ACK.
---
gtests/net/packetdrill/run_system_call.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/gtests/net/packetdrill/run_system_call.c b/gtests/net/packetdrill/run_system_call.c
index 5d0f624b..8a48a8fd 100644
--- a/gtests/net/packetdrill/run_system_call.c
+++ b/gtests/net/packetdrill/run_system_call.c
@@ -1896,6 +1896,15 @@ static int run_syscall_accept(struct state *state,
}
#endif /* DEBUG */
if ((socket->state == SOCKET_PASSIVE_SYNACK_SENT) || /* TFO */
+#if defined(__FreeBSD__)
+ /*
+ * In FreeBSD the accept system call might return after the
+ * reception of the SYN segment and before sending the
+ * SYN-ACK segment to allow the user to provide data when
+ * using TFO.
+ */
+ (socket->state == SOCKET_PASSIVE_PACKET_RECEIVED) ||
+#endif
(socket->state == SOCKET_PASSIVE_SYNACK_ACKED) ||
(socket->state == SOCKET_PASSIVE_COOKIE_ECHO_RECEIVED)) {
assert(is_equal_ip(&socket->live.remote.ip, &ip));
--
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