ip_monitor

#!/bin/bash

配置信息

SMTP_SERVER="smtp.qq.com" SMTP_PORT="465" SMTP_USER="1104647683@qq.com" SMTP_PASS="QQ邮箱生成授权码" TO_EMAIL="fudongcheng110@qq.com" FROM_EMAIL="1104647683@qq.com" SUBJECT="路由器IP变更通知"

存储上次IP的文件

LAST_IP_FILE="/tmp/last_ip_status" TEMP_IP_FILE="/tmp/current_ip_status" IP_LIST_FILE="/tmp/ip_monitor_list"

首先生成IP列表

获取IP客户端列表的脚本部分

$IP_LIST_FILE

获取IPv6邻居发现缓存并按MAC地址排序

ip -6 neigh show | sort -k5 | while read line; do IPV6_ADDR=$(echo $line | awk '{print $1}') MAC_ADDR=$(echo $line | awk '{print $5}') STATE=$(echo $line | awk '{print $NF}') echo "6|$MAC_ADDR|$IPV6_ADDR|$STATE" >> "${IP_LIST_FILE}.temp" done

获取IPv4邻居缓存并按MAC地址排序

ip neigh show | grep -E '^([0-9]{1,3}.){3}[0-9]{1,3}' | sort -k3 | while read line; do IPV4_ADDR=$(echo $line | awk '{print $1}') MAC_ADDR=$(echo $line | awk '{print $5}') STATE=$(echo $line | awk '{print $NF}') echo "4|$MAC_ADDR|$IPV4_ADDR|$STATE" >> "${IP_LIST_FILE}.temp" done

按MAC地址排序并处理

sort -t'|' -k2 "${IP_LIST_FILE}.temp" | awk -F'|' ' BEGIN { current_mac = "" } { if (current_mac != $2) { if (current_mac != "") { print "----------------------------------------" } # 尝试获取主机名（在实际环境中需要调整） "grep -i " $2 " /var/lib/misc/dnsmasq.leases | awk \047{print $4}\047" | getline hostname if (hostname == "") hostname = "Unknown"

    print "设备名称: " hostname
    print "MAC地址: " $2
    current_mac = $2
}

if ($1 == "4") {
    print "IPv4地址 (" $4 "): " $3
} else {
    print "IPv6地址 (" $4 "): " $3
}

} END { print "----------------------------------------" }' > $IP_LIST_FILE

rm -f "${IP_LIST_FILE}.temp"

获取当前IP信息

CURRENT_IP=$(ip -6 addr show scope global | grep -v deprecated | awk '/inet6/{print $2}' | cut -d'/' -f1 | tail -1) CURRENT_IPV4=$(ip -4 addr show scope global | awk '/inet/{print $2}' | cut -d'/' -f1 | tail -1)

保存当前IP到临时文件

echo "IPv6:${CURRENT_IP}" > "${TEMP_IP_FILE}" echo "IPv4:${CURRENT_IPV4}" >> "${TEMP_IP_FILE}"

检查是否需要发送邮件

if [ ! -f "${LAST_IP_FILE}" ] || ! cmp -s "${LAST_IP_FILE}" "${TEMP_IP_FILE}"; then # 读取设备列表 if [ -f "$IP_LIST_FILE" ]; then IP_LIST=$(cat "$IP_LIST_FILE") else IP_LIST="无设备信息" fi

# 构建邮件正文
BODY="=== 路由器网络信息 ===

路由器IPv6: ${CURRENT_IP} 路由器IPv4: ${CURRENT_IPV4}

=== 连接设备信息 === ${IP_LIST} ==================="

# 使用openssl生成base64编码
USER_BASE64=$(echo -n "${SMTP_USER}" | openssl enc -base64)
PASS_BASE64=$(echo -n "${SMTP_PASS}" | openssl enc -base64)

# 创建邮件内容
MAIL_CONTENT="From: ${FROM_EMAIL}

To: ${TO_EMAIL} Subject: ${SUBJECT} Content-Type: text/plain; charset=utf-8

${BODY}"

# 使用openssl发送邮件
(
    printf "EHLO localhost\r\n"
    sleep 1
    printf "AUTH LOGIN\r\n"
    sleep 1
    printf "%s\r\n" "${USER_BASE64}"
    sleep 1
    printf "%s\r\n" "${PASS_BASE64}"
    sleep 1
    printf "MAIL FROM:<%s>\r\n" "${FROM_EMAIL}"
    sleep 1
    printf "RCPT TO:<%s>\r\n" "${TO_EMAIL}"
    sleep 1
    printf "DATA\r\n"
    sleep 1
    printf "%s\r\n" "${MAIL_CONTENT}"
    printf ".\r\n"
    sleep 1
    printf "QUIT\r\n"
) | openssl s_client -connect ${SMTP_SERVER}:${SMTP_PORT} -quiet 2>/dev/null

# 更新上次的IP记录
cp "${TEMP_IP_FILE}" "${LAST_IP_FILE}"

清理临时文件

rm -f "${TEMP_IP_FILE}"

在 GitHub 上查看原文