mlvpn: Add package (Multi-Link Virtual Public Network)

Signed-off-by: Zhong Jianxin <azuwis@gmail.com>

net/mlvpn/Makefile

@@ -0,0 +1,62 @@
+#
+# Copyright (C) 2017 Zhong Jianxin <azuwis@gmail.com>
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=mlvpn
+PKG_VERSION:=2.3.2
+PKG_RELEASE:=1
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/zehome/MLVPN.git
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE_VERSION:=6f13423b8108f46edb9f230deee20e3741abe64c
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
+PKG_MIRROR_HASH:=e77916143162ffa050bc07482264f726b0c03a8fa9e07bb594a3759f512830cd
+
+PKG_LICENSE:=BSD-2-Clause
+PKG_MAINTAINER:=Zhong Jianxin <azuwis@gmail.com>
+
+PKG_INSTALL:=1
+PKG_FIXUP:=autoreconf
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/mlvpn
+  TITLE:=Multi-Link Virtual Public Network
+  SECTION:=net
+  CATEGORY:=Network
+  URL:=https://zehome.github.io/MLVPN/
+  SUBMENU:=VPN
+  MENU:=1
+  DEPENDS:=+kmod-tun +libev +libpcap +libsodium
+endef
+
+define Package/mlvpn/description
+  Multi-Link Virtual Public Network
+  Bond your internet links to increase bandwidth (unlimited).
+  Secure your internet connection by actively monitoring your links and removing the faulty ones, without loosing your TCP connections.
+  Secure your internet connection to the aggregation server using strong cryptography.
+  Scriptable automation and monitoring.
+endef
+
+define Package/mlvpn/conffiles
+/etc/mlvpn/
+endef
+
+define Package/mlvpn/install
+	$(INSTALL_DIR) \
+		$(1)/usr/sbin \
+		$(1)/etc/init.d \
+		$(1)/etc/mlvpn \
+
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/mlvpn $(1)/usr/sbin/
+	install -m0700 files/mlvpn-updown $(1)/usr/sbin/
+	$(INSTALL_BIN) files/mlvpn.init $(1)/etc/init.d/mlvpn
+endef
+
+$(eval $(call BuildPackage,mlvpn))

net/mlvpn/files/mlvpn-updown

@@ -0,0 +1,115 @@
+#!/bin/sh
+
+# up/down script for MLVPN.
+#
+# MLVPN calls this script with at least 2 arguments:
+# $1 : interface name
+# $2 : "command"
+# command can be:
+#    - "tuntap_up"
+#    - "tuntap_down"
+#    - "rtun_up" $3 : tunnel name
+#    - "rtun_down" $3 : tunnel name
+# tuntap_up is called when at least one tunnel is up
+# tuntap_down is called when at every tunnel is down
+# rtun_up is called when successfully connected
+# rtun_down is called when disconnected
+
+# Environment variables are set by mlvpn, reflecting
+# settings in mlvpn.conf
+# IP4=
+# IP6=
+# IP4_GATEWAY=
+# IP6_GATEWAY=
+# IP4_ROUTES=
+# IP6_ROUTES=
+# MTU=
+# DEVICE=
+
+DEVICE="$1"
+STATUS="$2"
+
+[ -z "$STATUS" ] || [ -z "$DEVICE" ] || [ -z "$MTU" ] && exit 1
+
+unamestr=$(uname)
+
+link_up()
+{
+    if [ "$unamestr" = "Linux" ]; then
+        ip link set dev "$DEVICE" mtu "$MTU" up
+        if [ ! -z "$IP4" ]; then
+            ip -4 addr add "$IP4" dev "$DEVICE"
+        fi
+        if [ ! -z "$IP6" ]; then
+            ip -6 addr add "$IP6" dev "$DEVICE"
+        fi
+    else
+        ifconfig "$DEVICE" mtu "$MTU" up
+        if [ ! -z "$IP4" ] && [ ! -z "$IP4_GATEWAY" ]; then
+            ifconfig "$DEVICE" inet "$IP4" "$IP4_GATEWAY" mtu "$MTU" up
+        fi
+        if [ ! -z "$IP6" ] && [ ! -z "$IP6_GATEWAY" ]; then
+            ifconfig "$DEVICE" inet "$IP6" "$IP6_GATEWAY" mtu "$MTU" up
+        fi
+    fi
+}
+link_down()
+{
+    if [ "$unamestr" = "Linux" ]; then
+        ip link set dev "$DEVICE" down
+    else
+        ifconfig "$DEVICE" down
+    fi
+}
+route_add()
+{
+    family=$1
+    route=$2
+    if [ "$unamestr" = "Linux" ]; then
+        via=""
+        if [ "$family" = "4" ]; then
+            [ -z "$IP4_GATEWAY" ] || via="via $IP4_GATEWAY"
+            ip -4 route add "$route" $via dev "$DEVICE"
+        elif [ "$family" = "6" ]; then
+            [ -z "$IP6_GATEWAY" ] || via="via $IP6_GATEWAY"
+            ip -6 route add "$route" $via dev "$DEVICE"
+        fi
+    else
+        if [ "$family" = "4" ]; then
+            route add -inet "$route" "$IP4_GATEWAY"
+        elif [ "$family" = "6" ]; then
+            route add -inet6 "$route" "$IP6_GATEWAY"
+        fi
+    fi
+}
+
+(
+ECHO="echo"
+[ "$MTU" -gt 1452 ] && (echo "MTU set too high."; exit 1)
+[ "$MTU" -lt 100 ] && (echo "MTU set too low."; exit 1)
+case "$STATUS" in
+    "tuntap_up")
+        $ECHO "$DEVICE up"
+        link_up
+        for r in $IP4_ROUTES; do
+            route_add 4 "$r"
+        done
+        for r in $IP6_ROUTES; do
+            route_add 6 "$r"
+        done
+    ;;
+    "tuntap_down")
+        $ECHO "$DEVICE down"
+        link_down
+    ;;
+    "rtun_up")
+        $ECHO "tunnel [$3] is up"
+        ;;
+    "rtun_down")
+        $ECHO "tunnel [$3] is down"
+        ;;
+esac
+
+) 2>&1 | logger -t mlvpn
+
+exit 0

net/mlvpn/files/mlvpn.init

@@ -0,0 +1,17 @@
+#!/bin/sh /etc/rc.common
+
+START=88
+USE_PROCD=1
+
+start_service() {
+	for path in /etc/mlvpn/*.conf; do
+		if [ -f "$path" ]; then
+			procd_open_instance
+			procd_set_param command /usr/sbin/mlvpn --config "$path" --user nobody
+			procd_set_param file "$path"
+			procd_set_param reload_signal SIGHUP
+			procd_set_param respawn
+			procd_close_instance
+		fi
+	done
+}

net/mlvpn/patches/010-musl-fix.patch

@@ -0,0 +1,11 @@
+--- a/src/privsep.c
++++ b/src/privsep.c
+@@ -778,7 +778,7 @@ sig_got_chld(int sig)
+     pid_t    pid;
+
+     do {
+-        pid = waitpid(WAIT_ANY, NULL, WNOHANG);
++        pid = waitpid(-1, NULL, WNOHANG);
+         if (pid == child_pid && cur_state < STATE_QUIT)
+             cur_state = STATE_QUIT;
+     } while (pid > 0 || (pid == -1 && errno == EINTR));