X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/7d758a6a6842fac6c511039c29d76300e2e21ccd..549d36ddec8c419af2223cc83162f58e9106650f:/src/OS/os.h-Linux

diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux
index 57034649c..63cf9babd 100644
--- a/src/OS/os.h-Linux
+++ b/src/OS/os.h-Linux
@@ -1,4 +1,7 @@
 /* Exim: OS-specific C header file for Linux */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* See the file NOTICE for conditions of use and distribution. */
+
 
 /* Some old systems we've received bug-reports for have a <limits.h> which
 does not pull in <features.h>.  Best to just pull it in now and have done
@@ -72,11 +75,17 @@ then change the 0 to 1 in the next block. */
 # define EXIM_HAVE_OPENAT
 #endif
 
+/* TCP Fast Open support */
+
 #include <netinet/tcp.h>	/* for TCP_FASTOPEN */
 #include <sys/socket.h>		/* for MSG_FASTOPEN */
 #if defined(TCP_FASTOPEN) && !defined(MSG_FASTOPEN)
 # define MSG_FASTOPEN 0x20000000
 #endif
+#define EXIM_HAVE_TCPI_UNACKED
+#ifndef TCPI_OPT_SYN_DATA
+# define TCPI_OPT_SYN_DATA 32
+#endif
 
 
 /* End */