FreeBSD: better support for TFO

[users/jgh/exim.git] / src / OS / os.c-FreeBSD

diff --git a/src/OS/os.c-FreeBSD b/src/OS/os.c-FreeBSD
index 4cc46c752a314094a22e34c3a743bf1dd0018e95..c0fd48df8432f3530878514efabe38f7a5b0602d 100644 (file)
--- a/src/OS/os.c-FreeBSD
+++ b/src/OS/os.c-FreeBSD
@@ -10,7 +10,7 @@ src/os.c file. */
 
 
 /*************
-* Sendfile   *
+Sendfile shim
 *************/
 
 ssize_t
@@ -23,4 +23,25 @@ if (sendfile(in, out, loff, cnt, NULL, &written, 0) < 0) return (ssize_t)-1;
 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 */