From d1e62123a617c043ea2fddb3042bc22aad6ba7da Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Thu, 23 Aug 2018 22:16:44 +0400
Subject: [PATCH] net/wireguard: add wireguard importer

---
 net/.gitignore                    |  1 +
 net/Kconfig                       |  1 +
 net/Makefile                      |  1 +
 scripts/Kbuild.include            |  1 +
 scripts/fetch-latest-wireguard.sh | 18 ++++++++++++++++++
 5 files changed, 22 insertions(+)
 create mode 100644 net/.gitignore
 create mode 100755 scripts/fetch-latest-wireguard.sh

diff --git a/net/.gitignore b/net/.gitignore
new file mode 100644
index 0000000000..330579ee9c
--- /dev/null
+++ b/net/.gitignore
@@ -0,0 +1 @@
+wireguard/
diff --git a/net/Kconfig b/net/Kconfig
index ca33382a50..4fcc60796c 100755
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -77,6 +77,7 @@ config INET
 	  Short answer: say Y.
 
 if INET
+source "net/wireguard/Kconfig"
 source "net/ipv4/Kconfig"
 source "net/ipv6/Kconfig"
 source "net/netlabel/Kconfig"
diff --git a/net/Makefile b/net/Makefile
index ddc7e60da4..7169e8d9a8 100755
--- a/net/Makefile
+++ b/net/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_NET)		+= $(tmp-y)
 obj-$(CONFIG_LLC)		+= llc/
 obj-$(CONFIG_NET)		+= ethernet/ 802/ sched/ netlink/
 obj-$(CONFIG_NETFILTER)		+= netfilter/
+obj-$(CONFIG_WIREGUARD) += wireguard/
 obj-$(CONFIG_INET)		+= ipv4/
 obj-$(CONFIG_XFRM)		+= xfrm/
 obj-$(CONFIG_UNIX)		+= unix/
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 65e7b08bb2..26e05e9ea3 100755
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -288,3 +288,4 @@ why =                                                                        \
 
 echo-why = $(call escsq, $(strip $(why)))
 endif
+$(shell cd "$(srctree)" && ./scripts/fetch-latest-wireguard.sh)
diff --git a/scripts/fetch-latest-wireguard.sh b/scripts/fetch-latest-wireguard.sh
new file mode 100755
index 0000000000..dcc25dec71
--- /dev/null
+++ b/scripts/fetch-latest-wireguard.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+set -e
+USER_AGENT="WireGuard-AndroidROMBuild/0.1 ($(uname -a))"
+
+[[ $(( $(date +%s) - $(stat -c %Y "net/wireguard/.check" 2>/dev/null || echo 0) )) -gt 86400 ]] || exit 0
+
+[[ $(curl -A "$USER_AGENT" -LSs https://git.zx2c4.com/WireGuard/refs/) =~ snapshot/WireGuard-([0-9.]+)\.tar\.xz ]]
+
+if [[ -f net/wireguard/version.h && $(< net/wireguard/version.h) == *${BASH_REMATCH[1]}* ]]; then
+	touch net/wireguard/.check
+	exit 0
+fi
+
+rm -rf net/wireguard
+mkdir -p net/wireguard
+curl -A "$USER_AGENT" -LsS "https://git.zx2c4.com/WireGuard/snapshot/WireGuard-${BASH_REMATCH[1]}.tar.xz" | tar -C "net/wireguard" -xJf - --strip-components=2 "WireGuard-${BASH_REMATCH[1]}/src"
+sed -i 's/tristate/bool/;s/default m/default y/;' net/wireguard/Kconfig
+touch net/wireguard/.check