X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/1bf08084e235d22625eb78f457d668064a1ce28b..586d7aa579e3038e63c51669dce2cb0677f335e3:/src/OS/os.c-FreeBSD

diff --git a/src/OS/os.c-FreeBSD b/src/OS/os.c-FreeBSD
index 4cc46c752..d65a789c0 100644
--- a/src/OS/os.c-FreeBSD
+++ b/src/OS/os.c-FreeBSD
@@ -2,7 +2,9 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) Jeremy Harris 1995 - 2019 */
+/* Copyright (c) Jeremy Harris 1995 - 2020 */
+/* Copyright (c) The Exim Maintainers 2021 */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* FreeBSD-specific code. This is concatenated onto the generic
@@ -10,17 +12,39 @@ src/os.c file. */
 
 
 /*************
-* Sendfile   *
+Sendfile shim
 *************/
 
 ssize_t
 os_sendfile(int out, int in, off_t * offp, size_t cnt)
 {
-off_t loff = *offp, written;
+off_t loff = offp ? *offp : 0;
+off_t written;
 
 if (sendfile(in, out, loff, cnt, NULL, &written, 0) < 0) return (ssize_t)-1;
-*offp = loff + written;
+if (offp) *offp = loff + written;
 return (ssize_t)written;
 }
 
+/*************************************************
+TCP Fast Open:  check that the ioctl is accepted
+*************************************************/
+
+#ifndef COMPILE_UTILITY
+void
+tfo_probe(void)
+{
+# ifdef TCP_FASTOPEN
+int sock;
+
+if (  (sock = socket(AF_INET, SOCK_STREAM, 0)) >= 0
+   && setsockopt(sock, IPPROTO_TCP, TCP_FASTOPEN, &on, sizeof(on) >= 0)
+   )
+  f.tcp_fastopen_ok = TRUE;
+close(sock);
+# endif
+}
+#endif
+
+
 /* End of os.c-Linux */