From a8d9f275d0ca64797cc89627f8003b48b3efef63 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Sun, 23 Feb 2020 01:34:13 +0200
Subject: net: Add libnatpmp support

---
 configure.ac | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index c69b793d6e..352e7aaee7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -143,6 +143,18 @@ AC_ARG_ENABLE([upnp-default],
   [use_upnp_default=$enableval],
   [use_upnp_default=no])
 
+AC_ARG_WITH([natpmp],
+            [AS_HELP_STRING([--with-natpmp],
+                            [enable NAT-PMP (default is yes if libnatpmp is found)])],
+            [use_natpmp=$withval],
+            [use_natpmp=auto])
+
+AC_ARG_ENABLE([natpmp-default],
+              [AS_HELP_STRING([--enable-natpmp-default],
+                              [if NAT-PMP is enabled, turn it on at startup (default is no)])],
+              [use_natpmp_default=$enableval],
+              [use_natpmp_default=no])
+
 AC_ARG_ENABLE(tests,
     AS_HELP_STRING([--disable-tests],[do not compile tests (default is to compile)]),
     [use_tests=$enableval],
@@ -1203,6 +1215,7 @@ if test "x$enable_fuzz" = "xyes"; then
   enable_wallet=no
   use_bench=no
   use_upnp=no
+  use_natpmp=no
   use_zmq=no
 
   AX_CHECK_PREPROC_FLAG([-DABORT_ON_FAILED_ASSUME],[[DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DABORT_ON_FAILED_ASSUME"]],,[[$CXXFLAG_WERROR]])
@@ -1300,6 +1313,13 @@ if test x$have_miniupnpc != xno; then
 fi
 fi
 
+dnl Check for libnatpmp (optional).
+if test "x$use_natpmp" != xno; then
+  AC_CHECK_HEADERS([natpmp.h],
+                   [AC_CHECK_LIB([natpmp], [initnatpmp], [NATPMP_LIBS=-lnatpmp], [have_natpmp=no])],
+                   [have_natpmp=no])
+fi
+
 if test x$build_bitcoin_wallet$build_bitcoin_cli$build_bitcoin_tx$build_bitcoind$bitcoin_enable_qt$use_tests$use_bench = xnonononononono; then
     use_boost=no
 else
@@ -1558,6 +1578,31 @@ else
   fi
 fi
 
+dnl Enable NAT-PMP support.
+AC_MSG_CHECKING([whether to build with support for NAT-PMP])
+if test "x$have_natpmp" = xno; then
+  if test "x$use_natpmp" = xyes; then
+     AC_MSG_ERROR([NAT-PMP requested but cannot be built. Use --without-natpmp])
+  fi
+  AC_MSG_RESULT([no])
+  use_natpmp=no
+else
+  if test "x$use_natpmp" != xno; then
+    AC_MSG_RESULT([yes])
+    AC_MSG_CHECKING([whether to build with NAT-PMP enabled by default])
+    use_natpmp=yes
+    natpmp_setting=0
+    if test "x$use_natpmp_default" != xno; then
+      use_natpmp_default=yes
+      natpmp_setting=1
+    fi
+    AC_MSG_RESULT($use_natpmp_default)
+    AC_DEFINE_UNQUOTED([USE_NATPMP], [$natpmp_setting], [NAT-PMP support not compiled if undefined, otherwise value (0 or 1) determines default state])
+  else
+    AC_MSG_RESULT([no])
+  fi
+fi
+
 dnl these are only used when qt is enabled
 BUILD_TEST_QT=""
 if test x$bitcoin_enable_qt != xno; then
@@ -1704,6 +1749,7 @@ AC_SUBST(SQLITE_LIBS)
 AC_SUBST(TESTDEFS)
 AC_SUBST(MINIUPNPC_CPPFLAGS)
 AC_SUBST(MINIUPNPC_LIBS)
+AC_SUBST(NATPMP_LIBS)
 AC_SUBST(EVENT_LIBS)
 AC_SUBST(EVENT_PTHREADS_LIBS)
 AC_SUBST(ZMQ_LIBS)
@@ -1791,6 +1837,7 @@ else
 fi
 echo "  with bench    = $use_bench"
 echo "  with upnp     = $use_upnp"
+echo "  with natpmp   = $use_natpmp"
 echo "  use asm       = $use_asm"
 echo "  sanitizers    = $use_sanitizers"
 echo "  debug enabled = $enable_debug"
-- 
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