41 lines
1.2 KiB
Bash
41 lines
1.2 KiB
Bash
#!/bin/sh
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VARS_CONF="/etc/bird/vars.conf"
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NEXTTRACE="/etc/bird-lg/nexttrace"
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# 1. 提取目标 IP (URL 中的 q 参数传过来的最后一个参数)
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TARGET=$(echo "$@" | awk '{print $NF}')
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# 2. 预设必须要带的 nexttrace 参数
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# 这样即使 bird-lgproxy.yaml 里没写全，这里也会兜底
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FIXED_ARGS="-C -n -M -q 1"
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# --- 内部函数：从 vars.conf 提取定义的值 ---
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get_var() {
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grep -E "define[[:space:]]+$1" "$VARS_CONF" | awk -F'=' '{print $2}' | tr -d ' ;"' | xargs
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}
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# --- 3. 根据目标 IP 段选择 Source IP ---
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SRC_IP=""
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if echo "$TARGET" | grep -q ':'; then
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SRC_IP=$(get_var "LOCAL_V6_kernel")
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else
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# IPv4 逻辑
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if echo "$TARGET" | grep -qE '^(172\.(2[0-3]|1[6-9]))'; then
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SRC_IP=$(get_var "DN42_V4_kernel")
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elif echo "$TARGET" | grep -qE '^10\.'; then
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SRC_IP=$(get_var "UNET_V4_kernel")
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else
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SRC_IP=$(get_var "LOCAL_V4_kernel")
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fi
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fi
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# --- 4. 组合并执行 ---
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# 确保如果没读到变量，就不传 -s，避免 nexttrace 报错
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if [ -n "$SRC_IP" ]; then
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# 使用 exec 替换当前进程，效率最高
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exec "$NEXTTRACE" $FIXED_ARGS -s "$SRC_IP" "$TARGET"
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else
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exec "$NEXTTRACE" $FIXED_ARGS "$TARGET"
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fi |