Linux and win support added (I hope)

.gitignore

@@ -1 +1,2 @@
-*.ovpn
+*.ovpn
+build/

build-all.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -e
+rm -rf openvpn3/bridge/*.a openvpn3/bridge/*.h
+docker run -it --rm -v `pwd`/build:/build -w /build -v `pwd`:/go-src-root --entrypoint /go-src-root/scripts/build-on-xgo.sh karalabe/xgo-base
+
+#We cross compile for windows on latest ubuntu because xgo-base has older ubuntu and older mingw with windows headers which are missing
+docker build -t mingw-crosscompile -f scripts/Dockerfile-mingw-ubuntu . && \
+docker run -it --rm -v `pwd`/build:/build -w /build -v `pwd`:/go-src-root --entrypoint /go-src-root/scripts/build-on-mingw.sh mingw-crosscompile

openvpn3/session.go

@@ -6,7 +6,11 @@ package openvpn3
 #cgo LDFLAGS: -lstdc++
 
 #cgo LDFLAGS: -L${SRCDIR}/bridge
-#cgo LDFLAGS: -lopenvpn3
+//main lib link
+//TODO reuse GOOS somehow?
+#cgo darwin LDFLAGS: -lopenvpn3_darwin_amd64
+#cgo linux LDFLAGS: -lopenvpn3_linux_amd64
+#cgo windows LDFLAGS: -lopenvpn3_windows_amd64
 //TODO copied from openvpnv3 lib build tool - do we really need all of this?
 #cgo darwin LDFLAGS: -framework Security -framework CoreFoundation -framework SystemConfiguration -framework IOKit -framework ApplicationServices
 

scripts/Dockerfile-mingw-ubuntu

@@ -0,0 +1,13 @@
+FROM ubuntu:18.04
+
+# Make sure apt-get is up to date and dependent packages are installed
+RUN \
+  apt-get update && \
+  apt-get install -y automake autogen build-essential ca-certificates \
+    gcc-mingw-w64 g++-mingw-w64 \
+    make xz-utils cpio wget zip unzip git texinfo help2man \
+    --no-install-recommends
+
+# Fix any stock package issues
+RUN ln -s /usr/include/asm-generic /usr/include/asm
+ENTRYPOINT ["/bin/bash"]

scripts/build-on-mingw.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -e
+
+export O3=`pwd`
+export DEP_DIR=`pwd`/dep_dir
+mkdir -p $DEP_DIR
+export DL=/build/dls
+mkdir -p $DL
+
+echo "Deps are in: $DEP_DIR"
+echo "DLs go to: $DL"
+echo "O3 is: $O3"
+
+/go-src-root/scripts/x-compile-windows.sh

scripts/build-on-xgo.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+. /go-src-root/scripts/helpers.sh
+rm -rf core
+fetch_openvpn3
+
+cp -f core/adapter/library.h /go-src-root/openvpn3/bridge/.
+
+export O3=`pwd`
+export DEP_DIR=`pwd`/dep_dir
+mkdir -p $DEP_DIR
+export DL=/build/dls
+mkdir -p $DL
+
+echo "Deps are in: $DEP_DIR"
+echo "DLs go to: $DL"
+echo "O3 is: $O3"
+
+/go-src-root/scripts/x-compile-linux.sh
+/go-src-root/scripts/x-compile-mac.sh

scripts/concat-libs.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -e
+#Usage ./concat-libs.sh outputlib.a <list of o files>
+outputLib=$1
+shift
+
+mkdir -p objs
+pushd objs
+    for lib in ${MORE_LIBS[@]}; do
+        echo "Extracting $lib"
+        $AR_CMD x $lib
+    done
+popd
+
+$AR_CMD rc $outputLib \
+    objs/*.o \
+    ${@}
+rm -rf objs

scripts/helpers.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+function fetch_openvpn3() {
+    git clone https://github.com/MysteriumNetwork/openvpn3.git core
+}

scripts/x-compile-linux.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -e
+
+PLATFORM=linux
+SCRIPTS=linux
+LIBSUFFIX=linux_amd64
+
+echo "Building for: $PLATFORM"
+
+core/scripts/$SCRIPTS/build-all
+
+. core/vars/setpath
+. core/vars/vars-linux
+
+cd core/adapter
+PROF=$PLATFORM MTLS=1 NOSSL=1 LZ4=1 ASIO=1 ECHO=1 CO=1 build library
+
+LIB_OUT="/go-src-root/openvpn3/bridge/libopenvpn3_${LIBSUFFIX}.a"
+rm -rf $LIB_OUT
+
+libs=("$DEP_DIR/mbedtls/mbedtls-$PLATFORM/library/libmbedtls.a" \
+"$DEP_DIR/lz4/lz4-$PLATFORM/lib/liblz4.a" )
+
+MORE_LIBS=${libs[@]} /go-src-root/scripts/concat-libs.sh $LIB_OUT library.o
+
+$RANLIB_CMD $LIB_OUT | grep -v "has no symbols" || true

scripts/x-compile-mac.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -e
+#x-compile.sh <profile>
+#where profile can be linux | osx | mingw (windows)
+
+PLATFORM=osx
+SCRIPTS=mac
+LIBSUFFIX=darwin_amd64
+
+echo "Building for: $PLATFORM"
+
+OSX_ONLY=1 "core/scripts/$SCRIPTS/build-all"
+
+. core/vars/setpath
+
+
+cd core/adapter
+PROF=$PLATFORM MTLS=1 NOSSL=1 LZ4=1 ASIO=1 ECHO=1 CO=1 build library
+
+LIB_OUT="/go-src-root/openvpn3/bridge/libopenvpn3_${LIBSUFFIX}.a"
+rm -rf $LIB_OUT
+
+x86_64-apple-darwin15-libtool -static -o $LIB_OUT \
+    $DEP_DIR/mbedtls/mbedtls-$PLATFORM/library/libmbedtls.a \
+    $DEP_DIR/lz4/lz4-$PLATFORM/lib/liblz4.a \
+    library.o

scripts/x-compile-windows.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -e
+#x-compile.sh <profile>
+#where profile can be linux | osx | mingw (windows)
+
+PLATFORM=mingw
+SCRIPTS=win
+LIBSUFFIX=windows_amd64
+
+echo "Building for: $PLATFORM"
+
+"core/scripts/$SCRIPTS/build-all"
+
+. core/vars/setpath
+. core/vars/vars-$PLATFORM
+cd core/adapter
+PROF=$PLATFORM MTLS=1 NOSSL=1 LZ4=1 ASIO=1 ECHO=1 CO=1 build library
+
+LIB_OUT="/go-src-root/openvpn3/bridge/libopenvpn3_${LIBSUFFIX}.a"
+rm -rf $LIB_OUT
+
+libs=("$DEP_DIR/mbedtls/mbedtls-$PLATFORM/library/libmbedtls.a" \
+"$DEP_DIR/lz4/lz4-$PLATFORM/lib/liblz4.a" )
+
+MORE_LIBS=${libs[@]} /go-src-root/scripts/concat-libs.sh $LIB_OUT library.o
+
+$RANLIB_CMD $LIB_OUT | grep -v "has no symbols" || true