From 3db4bfe11101ab1e579c62f483c55e88efce5d7c Mon Sep 17 00:00:00 2001
From: xnullzz <xnullzz@xnullz.ddns.net>
Date: Fri, 14 Nov 2025 02:51:54 +0300
Subject: [PATCH] x-ui ip1->ip2 auto

---
 xray-ip1ip2.sh | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 xray-ip1ip2.sh

diff --git a/xray-ip1ip2.sh b/xray-ip1ip2.sh
new file mode 100644
index 0000000..e71429b
--- /dev/null
+++ b/xray-ip1ip2.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+set -e
+
+SECOND_IP="$1"
+[ -z "$SECOND_IP" ] && echo "Usage: $0 SECOND_IP" && exit 1
+[ "$(id -u)" -ne 0 ] && echo "Run as root" && exit 1
+
+DEFAULT_LINE=$(ip route show default | head -n1)
+GATEWAY=$(echo "$DEFAULT_LINE" | awk '{for(i=1;i<=NF;i++){if($i=="via"){print $(i+1); exit}}}')
+DEV=$(echo "$DEFAULT_LINE" | awk '{for(i=1;i<=NF;i++){if($i=="dev"){print $(i+1); exit}}}')
+
+systemctl list-unit-files | grep -q '^x-ui.service' || { echo "x-ui.service not found"; exit 1; }
+
+[ ! -f /etc/systemd/system/xray.slice ] && cat <<EOF >/etc/systemd/system/xray.slice
+[Unit]
+Description=Xray traffic slice
+Before=slices.target
+EOF
+
+mkdir -p /etc/systemd/system/x-ui.service.d
+cat <<EOF >/etc/systemd/system/x-ui.service.d/slice.conf
+[Service]
+Slice=xray.slice
+EOF
+
+systemctl daemon-reload
+systemctl restart x-ui.service
+
+iptables -t mangle -C OUTPUT -m cgroup --path xray.slice -j MARK --set-mark 1 2>/dev/null || \
+iptables -t mangle -A OUTPUT -m cgroup --path xray.slice -j MARK --set-mark 1
+
+iptables -t nat -C POSTROUTING -m mark --mark 1 -o "$DEV" -j SNAT --to-source "$SECOND_IP" 2>/dev/null || \
+iptables -t nat -A POSTROUTING -m mark --mark 1 -o "$DEV" -j SNAT --to-source "$SECOND_IP"
+
+grep -qE '^\s*100\s+xray\b' /etc/iproute2/rt_tables 2>/dev/null || echo "100 xray" >> /etc/iproute2/rt_tables
+
+ip rule del fwmark 1 table 100 2>/dev/null || true
+ip rule add fwmark 1 table 100
+ip route flush table 100 2>/dev/null || true
+ip route add default via "$GATEWAY" dev "$DEV" src "$SECOND_IP" table 100
+
+sysctl -w net.core.default_qdisc=fq >/dev/null
+sysctl -w net.ipv4.tcp_congestion_control=bbr >/dev/null
+grep -q 'net.core.default_qdisc=fq' /etc/sysctl.conf 2>/dev/null || cat <<EOF >>/etc/sysctl.conf
+net.core.default_qdisc=fq
+net.ipv4.tcp_congestion_control=bbr
+EOF
+sysctl -p >/dev/null || true
+
+cat <<EOF >/usr/local/sbin/xray-routing.sh
+#!/bin/bash
+ip rule add fwmark 1 table 100 2>/dev/null || true
+ip route add default via "$GATEWAY" dev "$DEV" src "$SECOND_IP" table 100 2>/dev/null || true
+EOF
+
+chmod +x /usr/local/sbin/xray-routing.sh
+
+cat <<EOF >/etc/systemd/system/xray-routing.service
+[Unit]
+Description=Policy routing for Xray dual-IP
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/local/sbin/xray-routing.sh
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+systemctl daemon-reload
+systemctl enable xray-routing.service
+systemctl start xray-routing.service
+
+echo "OK: $SECOND_IP active"
+