From 62dbeca7323e74d4e08a08a878f429ad0a050616 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Wed, 23 May 2018 03:52:26 +0200
Subject: [PATCH] libwg-go: use gopath

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 app/tools/libwg-go/.gitignore                 |  7 +----
 app/tools/libwg-go/Makefile                   | 11 +++----
 .../wireguard-go}/api-android.go              | 20 +++---------
 .../git.zx2c4.com/wireguard-go}/jni.c         |  0
 .../wireguard-go/tun/api-android.go           | 31 +++++++++++++++++++
 app/tools/wireguard                           |  2 +-
 app/tools/wireguard-go                        |  2 +-
 7 files changed, 43 insertions(+), 30 deletions(-)
 rename app/tools/libwg-go/{ => src/git.zx2c4.com/wireguard-go}/api-android.go (90%)
 rename app/tools/libwg-go/{ => src/git.zx2c4.com/wireguard-go}/jni.c (100%)
 create mode 100644 app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/tun/api-android.go

diff --git a/app/tools/libwg-go/.gitignore b/app/tools/libwg-go/.gitignore
index 2a4c534..c464c73 100644
--- a/app/tools/libwg-go/.gitignore
+++ b/app/tools/libwg-go/.gitignore
@@ -1,7 +1,2 @@
-go/
-*.go
-libwg-go.h
-jni.o
-gopath/
-goroot/
+src/
 .gobuildversion
diff --git a/app/tools/libwg-go/Makefile b/app/tools/libwg-go/Makefile
index a7828e7..671ffa1 100644
--- a/app/tools/libwg-go/Makefile
+++ b/app/tools/libwg-go/Makefile
@@ -11,7 +11,6 @@ NDK_GO_ARCH_MAP_arm64 := arm64
 NDK_GO_ARCH_MAP_mips := mipsx
 NDK_GO_ARCH_MAP_mips64 := mips64x
 
-export GOPATH := $(CURDIR)/gopath
 CLANG_FLAGS := --target=$(ANDROID_LLVM_TRIPLE) --gcc-toolchain=$(ANDROID_TOOLCHAIN_ROOT) --sysroot=$(ANDROID_SYSROOT)
 export CGO_CFLAGS := $(CLANG_FLAGS) $(CFLAGS)
 export CGO_LDFLAGS := $(CLANG_FLAGS) $(LDFLAGS)
@@ -48,12 +47,12 @@ endif
 
 $(shell test "$$(cat .gobuildversion 2>/dev/null)" = "$(GOBUILDVERSION_CURRENT)" || rm -f "$(DESTDIR)/libwg-go.so")
 
-$(DESTDIR)/libwg-go.so: $(FILES) api-android.go jni.c
+$(DESTDIR)/libwg-go.so: $(FILES) src/git.zx2c4.com/wireguard-go/api-android.go src/git.zx2c4.com/wireguard-go/tun/api-android.go src/git.zx2c4.com/wireguard-go/jni.c
 	find . -name '*.go' -type l -delete
 	find . -type d -empty -delete
-	mkdir -p $(subst ../wireguard-go/,./,$(dir $(FILES)))
-	$(foreach FILE,$(FILES),ln -sfrt $(subst ../wireguard-go/,./,$(dir $(FILE))) $(FILE);)
+	mkdir -p $(subst ../wireguard-go/,./src/git.zx2c4.com/wireguard-go/,$(dir $(FILES)))
+	$(foreach FILE,$(FILES),ln -sfrt $(subst ../wireguard-go/,./src/git.zx2c4.com/wireguard-go/,$(dir $(FILE))) $(FILE);)
 	patch -p1 -f -R -s --dry-run -d"$$(go env GOROOT)" < goruntime-boottime-over-monotonic.diff
-	go get -v -d
-	go build -v -o $(DESTDIR)/libwg-go.so -buildmode c-shared
+	GOPATH=$(PWD) go get -v -d git.zx2c4.com/wireguard-go
+	GOPATH=$(PWD) go build -v -o $(DESTDIR)/libwg-go.so -buildmode c-shared git.zx2c4.com/wireguard-go
 	go version > .gobuildversion
diff --git a/app/tools/libwg-go/api-android.go b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go
similarity index 90%
rename from app/tools/libwg-go/api-android.go
rename to app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go
index faf718a..24a0eae 100644
--- a/app/tools/libwg-go/api-android.go
+++ b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go
@@ -10,8 +10,8 @@ package main
 import "C"
 
 import (
-	"./rwcancel"
 	"bufio"
+	"git.zx2c4.com/wireguard-go/tun"
 	"golang.org/x/sys/unix"
 	"io/ioutil"
 	"log"
@@ -64,28 +64,16 @@ func wgTurnOn(ifnameRef string, tun_fd int32, settings string) int32 {
 
 	logger.Debug.Println("Debug log enabled")
 
-	tun := &NativeTun{
-		fd:     os.NewFile(uintptr(tun_fd), "/dev/tun"),
-		events: make(chan TUNEvent, 5),
-		errors: make(chan error, 5),
-		nopi:   true,
-	}
-	var err error
-
-	tun.fdCancel, err = rwcancel.NewRWCancel(int(tun_fd))
-	if err != nil {
-		unix.Close(int(tun_fd))
-		logger.Error.Println(err)
-		return -1
-	}
-	name, err := tun.Name()
+	tun, name, err := tun.CreateTUNFromFD(int(tun_fd))
 	if err != nil {
 		unix.Close(int(tun_fd))
 		logger.Error.Println(err)
 		return -1
 	}
+
 	logger.Info.Println("Attaching to interface", name)
 	device := NewDevice(tun, logger)
+
 	logger.Debug.Println("Interface has MTU", device.tun.mtu)
 
 	bufferedSettings := bufio.NewReadWriter(bufio.NewReader(strings.NewReader(settings)), bufio.NewWriter(ioutil.Discard))
diff --git a/app/tools/libwg-go/jni.c b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c
similarity index 100%
rename from app/tools/libwg-go/jni.c
rename to app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c
diff --git a/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/tun/api-android.go b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/tun/api-android.go
new file mode 100644
index 0000000..3cb5753
--- /dev/null
+++ b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/tun/api-android.go
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+package tun
+
+import (
+	"git.zx2c4.com/wireguard-go/rwcancel"
+	"os"
+)
+
+func CreateTUNFromFD(tun_fd int) (TUNDevice, string, error) {
+	tun := &nativeTun{
+		fd:     os.NewFile(uintptr(tun_fd), "/dev/tun"),
+		events: make(chan TUNEvent, 5),
+		errors: make(chan error, 5),
+		nopi:   true,
+	}
+	var err error
+	tun.fdCancel, err = rwcancel.NewRWCancel(tun_fd)
+	if err != nil {
+		return nil, "", err
+	}
+	name, err := tun.Name()
+	if err != nil {
+		tun.fdCancel.Cancel()
+		return nil, "", err
+	}
+	return tun, name, nil
+}
diff --git a/app/tools/wireguard b/app/tools/wireguard
index d67d89c..6977826 160000
--- a/app/tools/wireguard
+++ b/app/tools/wireguard
@@ -1 +1 @@
-Subproject commit d67d89c7f9d83d22d750452236b0e16510ab1368
+Subproject commit 6977826c2c9840f79dc2ac6b4206a5f393e9dfb4
diff --git a/app/tools/wireguard-go b/app/tools/wireguard-go
index 65a74f3..0b647d1 160000
--- a/app/tools/wireguard-go
+++ b/app/tools/wireguard-go
@@ -1 +1 @@
-Subproject commit 65a74f3175855dc41b49332103ada6bb27733291
+Subproject commit 0b647d1ca7e079f3bb2fe95c3ca7c05898315a6e