From 23242d824fb9d42ffb536f848fd9f0e725746736 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=96=B5=E4=BA=8C?=
 <66155308+miaoermua@users.noreply.github.com>
Date: Mon, 10 Jun 2024 14:16:15 +0800
Subject: [PATCH] Update catnd

---
 cattools.sh | 158 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)

diff --git a/cattools.sh b/cattools.sh
index 33f821b..d33c239 100644
--- a/cattools.sh
+++ b/cattools.sh
@@ -29,6 +29,7 @@ show_menu() {
     echo "2. Debug                                    -  抓取日志"
     echo "3. catwrt_update                            -  检查更新"
     echo "4. use_repo                                 -  启用软件源"
+    echo "5. diagnostics                              -  网络诊断"
     echo "0. Exit                                     -  退出"
     echo "----------------------------------------------------------"
     echo -n "请输入数字并回车(Please enter your choice): "
@@ -235,6 +236,160 @@ use_repo(){
     opkg update
 }
 
+# catnd
+
+catnd(){
+    echo "$(date) - Starting CatWrt Network Diagnostics" 
+    echo " "
+    
+    # Ping & PPPoE
+    ping -c 3 223.5.5.5 > /dev/null
+    if [ $? -eq 0 ]; then
+        echo "[Ping] Network connection succeeded!"
+        echo " "
+    else
+        ping -c 3 119.29.29.99 > /dev/null
+        if [ $? -eq 0 ]; then
+            echo "[Ping] Network connection succeeded,But there may be problems!"
+            echo " "
+        else
+            pppoe_config=$(grep 'pppoe' /etc/config/network)
+            if [ ! -z "$pppoe_config" ]; then
+                echo "[PPPoE] Please check if your PPPoE account and password are correct."
+                echo " "
+            fi
+            exit 1
+        fi
+    fi
+    
+    # DNS
+    valid_dns="1.1.1.1 1.0.0.1 8.8.8.8 8.8.4.4 223.6.6.6 223.5.5.5 180.76.76.76 208.67.222.222 208.67.220.220 119.29.29.99"
+    
+    dns_config=$(grep 'option dns' /etc/config/network)
+    dns_servers=$(echo $dns_config | awk -F "'" '{print $2}')
+    
+    for ip in $dns_servers; do
+      if ! [[ $valid_dns =~ (^|[ ])$ip($|[ ]) ]]; then
+        echo "[DNS] Recommended to delete DNS $ip"
+        echo " "
+        exit 1
+      fi
+    done
+    
+    # Bad DNS
+    echo "[DNS] DNS configuration looks good!"
+    echo " "
+    
+    bad_dns="114.114.114.114 114.114.115.115 119.29.29.29"
+    if [[ $dns_config =~ $bad_dns ]]; then
+      echo "[DNS] DNS may be polluted or unreliable"
+      echo " "
+    fi
+    
+    # nslookup
+    nslookup bilibili.com > /dev/null
+    if [ $? -ne 0 ]; then
+      nslookup www.miaoer.xyz > /dev/null
+      if [ $? -eq 0 ]; then  
+        echo "[DNS] DNS resolution succeeded"
+        echo " "
+      else
+        echo "[DNS] NS resolution failed for 'www.miaoer.xyz'"
+        echo "[DNS] Your DNS server may have issues"
+        echo " "
+      fi
+    fi
+    
+    # Public IP
+    echo CatWrt IPv4 Addr: $(curl --silent --connect-timeout 5 4.ipw.cn )
+    echo " "
+    
+    curl 6.ipw.cn --connect-timeout 5 > /dev/null 2>&1
+    if [ $? -ne 0 ]; then
+      echo "[IPv6] IPv6 network connection timed out"
+      echo " "
+    else
+      echo CatWrt IPv6 Addr: $(curl --silent 6.ipw.cn) 
+      echo " "
+    fi
+    
+    # IPv6
+    resp=$(curl --silent test.ipw.cn)
+    
+    if echo "$resp" | grep -q -E '240e|2408|2409|2401'; then
+      echo "[IPv6] IPv6 access is preferred"
+      echo " "
+    else
+      echo "[IPv6] IPv4 access is preferred" 
+      echo " "
+    fi
+    
+    # Default IP
+    ipaddr_config=$(grep '192.168.1.4' /etc/config/network)
+    
+    if [ -z "$ipaddr_config" ]; then
+      echo "[Default-IP] address is not the catwrt default 192.168.1.4"
+      echo "Please configure your network at 'https://www.miaoer.xyz/posts/network/quickstart-catwrt'"
+      echo " "
+    fi
+    
+    # Bypass Gateway
+    wan_config=$(grep 'config interface' /etc/config/network | grep 'wan')
+    
+    if [ -z "$wan_config" ]; then
+      echo "[Bypass Gateway] No config for 'wan' interface found in /etc/config/network"
+      echo "Please check if your device is set as a Bypass Gateway"
+      echo " "
+    fi
+    
+    # Rotuer Mode(PPPoE)
+    pass_config=$(grep 'password' /etc/config/network)
+    user_config=$(grep 'username' /etc/config/network)
+    pppoe_config=$(grep 'pppoe' /etc/config/network)
+    
+    if [ -n "$pass_config" ] && [ -n "$user_config" ] && [ -n "$pppoe_config" ]; then
+        echo "[PPPoE] PPPoE Rotuer Mode"
+        echo " " 
+    else
+        echo "[PPPoE] DHCP protocol detected in WAN interface"
+        echo "The device may not be in PPPoE Rotuer Mode"
+        echo " " 
+    fi
+    
+    # IPv6 WAN6
+    grep 'config interface' /etc/config/network | grep 'wan6'  > /dev/null
+    if [ $? -ne 0 ]; then
+       echo "[wan6] Your IPv6 network may have issues"
+       echo " "
+    fi 
+    
+    grep 'dhcpv6' /etc/config/network > /dev/null
+    if [ $? -ne 0 ]; then
+       echo "[wan6] Your IPv6 network may have issues"
+       echo " "
+    fi
+    
+    # Tcping
+    echo "[Tcping] Testing..."
+    
+    tcping -q -c 1 cn.bing.com
+    [ $? -ne 0 ] && echo "Failed: cn.bing.com"
+    
+    tcping -q -c 1 bilibili.com
+    [ $? -ne 0 ] && echo "Failed: bilibili.com"
+    
+    tcping -q -c 1 github.com
+    [ $? -ne 0 ] && echo "Failed: github.com"
+    
+    tcping -q -c 1 google.com.hk
+    [ $? -ne 0 ] && echo "Failed: google.com.hk"
+    
+    echo " "
+    echo "$(date) - Network check completed!"
+    echo " "
+    echo "CatWrt Network Diagnostics by @miaoermua"
+}
+
 while true; do
     show_menu
     read choice
@@ -251,6 +406,9 @@ while true; do
         4)
             use_repo
             ;;
+        5)
+            catnd
+            ;;
         0)
             echo "Exiting..."
             break