☰

dnsmasq 需要重新启动 BeagleBone Black（Debian 8.5）上的网络系统

tag-icon • tag-icon wireless-networking dhcp wireless-access-point dnsmasq debian-jessie
dnsmasq 需要重新启动 BeagleBone Black（Debian 8.5）上的网络系统

我目前正在尝试将运行 debian 8.5 的 BeagleBone Black 配置为 WiFi 接入点。使用的程序是hostapd和dnsmasq。我取得了巨大的进步，原则上接入点按预期工作（我可以连接到它并访问 Lighty 托管的网站），但有一个小问题。重启后我无法连接，因为dnsmasq抱怨 wlan0 没有地址。

摘录自/var/log/syslog：

Jun 24 12:01:03 arm dnsmasq[487]: warning: interface wlan0 does not currently exist
Jun 24 12:01:03 arm dnsmasq-dhcp[487]: DHCP, IP range 192.168.3.20 -- 192.168.3.200, lease time infinite
Jun 24 12:01:53 arm dnsmasq-dhcp[487]: DHCP packet received on wlan0 which has no address

当我重新启动网络系统时，/etc/init.d/networking restart一切正常，如上所述。重新启动dnsmasq或呼叫ifup wlan0无法解决问题。根据日志，我猜测存在某种时间问题（即 USB WiFi 棒在 dnsmasq 启动后被识别，或类似情况），但我真的不知道如何克服。我添加了allow-hotplug wlan0但/etc/network/interfaces没有任何改变。

除了 /etc/network/interfaces 之外：

auto wlan0
allow-hotplug wlan0
iface wlan0 inet static
    address 192.168.3.1

我的/etc/dnsmasq.conf基本内容是：

# Disable DNS
port=0
interface=wlan0
no-dhcp-interface=eth0
dhcp-range=interface:wlan0,192.168.3.20,192.168.3.200,infinite

编辑：

跑步ifconfig wlan0 192.168.3.1也有效。

答案1

您可以创建一个 if-up 脚本来检查 dnsmasq 是否必须重新启动。

/etc/network/if-up.d/dnsmasq：

#!/bin/sh
[ "$IFACE" != "lo" ] || exit 0

restartDnsMasq() {
    if [ -d /run/systemd/system ]; then
        systemctl reload --no-block dnsmasq >/dev/null 2>&1 || true
    else
        invoke-rc.d dnsmasq restart >/dev/null 2>&1 || true
    fi
}

# Find out if dnsmasq is configured to run on a single interface
interface=$(cat /etc/dnsmasq.conf | grep interface | awk -F '=' '{print $2}')
if  [ "x${interface}" = "x" ]; then
    # all interfaces
    logger DnsMasq not configured for any particular interface, restarting because $IFACE came up.
    restartDnsMasq
else
    if [ "${interface}" = "$IFACE" ]; then
        # The interface that dnsmasq is running on is being brought up
        logger DnsMasq configured for interface ${interface}, restarting because $IFACE came up.
        restartDnsMasq
    else
        logger DnsMasq configured for interface ${interface}, not restarting because $IFACE came up.
    fi 
fi

相关内容