From 563f0b8aef9558a900f215dfccc571eab99a0223 Mon Sep 17 00:00:00 2001
From: Francis Dupont <fdupont@isc.org>
Date: Sat, 23 Dec 2017 01:18:23 +0100
Subject: Merged rt44535 (relay port)

---
 configure.ac | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 52e7bb4e..62593d3f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -177,6 +177,15 @@ else
     enable_dhcpv4o6="no"
 fi
 
+# Relay port (draft-ietf-dhc-relay-port-10.txt) optional compile-time feature.
+AC_ARG_ENABLE(relay-port,
+	AS_HELP_STRING([--enable-relay-port],[enable support for relay port (default is no)]))
+# Relay port is off by default (for now)
+if test "$enable_relay_port" = "yes"; then
+	AC_DEFINE([RELAY_PORT], [1],
+		  [Define to 1 to include relay port support.])
+fi
+
 # PARANOIA is off by default (until we can test it with all features)
 AC_ARG_ENABLE(paranoia,
 	AS_HELP_STRING([--enable-paranoia],[enable support for chroot/setuid (default is no)]))
@@ -521,6 +530,7 @@ AC_CHECK_HEADERS(ifaddrs.h)
 # figure out what IPv4 interface code to use
 AC_CHECK_HEADERS(linux/types.h)  # needed for linux/filter.h on old systems
 
+relay_port_supported="no"
 AC_CHECK_HEADER(linux/filter.h, DO_LPF=1, ,
 [
 #ifdef HAVE_LINUX_TYPES_H
@@ -531,6 +541,7 @@ if test -n "$DO_LPF"
 then
 	AC_DEFINE([HAVE_LPF], [1],
 		  [Define to 1 to use the Linux Packet Filter interface code.])
+	relay_port_supported="yes"
 else
 	AC_CHECK_HEADER(sys/dlpi.h, DO_DLPI=1)
 	if test -n "$DO_DLPI"
@@ -544,10 +555,17 @@ else
 			AC_DEFINE([HAVE_BPF], [1],
 				   [Define to 1 to use the
 				   Berkeley Packet Filter interface code.])
+			relay_port_supported="yes"
 		fi
 	fi
 fi
 
+if test "$enable_relay_port" = "yes"; then
+	if test "$relay_port_supported" != "yes"; then
+		AC_MSG_ERROR([--enable-relay-port requires BPF or LPF])
+	fi
+fi
+
 # SIOCGLIFCONF uses some transport structures.  Trick is not all platforms
 # use the same structures.  We like to use 'struct lifconf' and 'struct
 # lifreq', but we'll use these other structures if they're present.  HPUX
@@ -1035,6 +1053,7 @@ Features:
   dhcpv6:        $enable_dhcpv6
   delayed-ack:   $enable_delayed_ack
   dhcpv4o6:      $enable_dhcpv4o6
+  relay-port:    $enable_relay_port
 
 Developer:
   ATF unittests : $atf_path
-- 
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