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Published 20 hours ago • verified publisher icon coolsnowwolf

请问如何默认关闭lan口的dhcp服务

Open viviczh1 opened this issue 2 years ago • 16 comments

路由一直都是作为旁路网关使用，想在编译时默认关闭lan口的dhcp功能，请问如何修改配置？

viviczh1 avatar Nov 01 '22 00:11 viviczh1 

# 通过 opkg search 配置文件找到属于dnsmasq的包
$ opkg search /etc/config/dhcp
dnsmasq-full - 2.86-13
# 源码里搜
$ find -type d -name 'dnsmasq*'
./package/network/services/dnsmasq
# 进目录找到文件
$ cat package/network/services/dnsmasq/files/dhcp.conf

主要是

config dhcp 'lan'
	option interface 'lan'
	option ignore '1'

另一种方法是用 uci-defaults，也就是源码目录存放 files/etc/uci-defaults/zzz-default-settings.sh 一个shell文件，名字的字母让排序是最后，里面写

uci set dhcp.lan.ignore='1'
uci commit dhcp

当然，最人性化的是 uci-defaults 的脚本里上面的逻辑外面加一个判断，如果只有一个网口才取消lan的dhcp

zhangguanzhang avatar Nov 01 '22 01:11 zhangguanzhang

非常感谢，我这就测试一下

viviczh1 avatar Nov 01 '22 01:11 viviczh1 

# 通过 opkg search 配置文件找到属于dnsmasq的包
$ opkg search /etc/config/dhcp
dnsmasq-full - 2.86-13
# 源码里搜
$ find -type d -name 'dnsmasq*'
./package/network/services/dnsmasq
# 进目录找到文件
$ cat package/network/services/dnsmasq/files/dhcp.conf

主要是

config dhcp 'lan'
	option interface 'lan'
	option ignore '1'

另一种方法是用 uci-defaults，也就是源码目录存放 files/etc/uci-defaults/zzz-default-settings.sh 一个shell文件，名字的字母让排序是最后，里面写

uci set dhcp.lan.ignore='1'
uci commit dhcp

当然，最人性化的是 uci-defaults 的脚本里上面的逻辑外面加一个判断，如果只有一个网口才取消lan的dhcp

您好呀，前面的我通过学习openwrt的官方文档我会了。但是我就是不会最后一个，就是，逻辑判断，人性化地判断网口的数量。

我是这样设置的

# 设置自定义dhcp
cat > $lede/lede/package/base-files/files/etc/uci-defaults/80_customized << "EOF"

uci add_list dhcp.lan.dhcp_option="6,119.29.29.29,223.5.5.5"

uci add dhcp domain
uci set dhcp.@domain[-1].name="xxxxxxx.com"
uci set dhcp.@domain[-1].ip="192.168.50.1"
uci delete dhcp.@dnsmasq[0].filter_aaaa

uci commit dhcp

## uci delete dhcp.dnsmasq..option.filter_aaaa 这是自己的学习的记录

exit 0

EOF

adamgonglj avatar Nov 02 '22 00:11 adamgonglj 

# 通过 opkg search 配置文件找到属于dnsmasq的包
$ opkg search /etc/config/dhcp
dnsmasq-full - 2.86-13
# 源码里搜
$ find -type d -name 'dnsmasq*'
./package/network/services/dnsmasq
# 进目录找到文件
$ cat package/network/services/dnsmasq/files/dhcp.conf

主要是

config dhcp 'lan'
	option interface 'lan'
	option ignore '1'

另一种方法是用 uci-defaults，也就是源码目录存放 files/etc/uci-defaults/zzz-default-settings.sh 一个shell文件，名字的字母让排序是最后，里面写

uci set dhcp.lan.ignore='1'
uci commit dhcp

当然，最人性化的是 uci-defaults 的脚本里上面的逻辑外面加一个判断，如果只有一个网口才取消lan的dhcp

您好呀，前面的我通过学习openwrt的官方文档我会了。但是我就是不会最后一个，就是，逻辑判断，人性化地判断网口的数量。

我是这样设置的

# 设置自定义dhcp
cat > $lede/lede/package/base-files/files/etc/uci-defaults/80_customized << "EOF"

uci add_list dhcp.lan.dhcp_option="6,119.29.29.29,223.5.5.5"

uci add dhcp domain
uci set dhcp.@domain[-1].name="xxxxxxx.com"
uci set dhcp.@domain[-1].ip="192.168.50.1"
uci delete dhcp.@dnsmasq[0].filter_aaaa

uci commit dhcp

## uci delete dhcp.dnsmasq..option.filter_aaaa 这是自己的学习的记录

exit 0

EOF

if xxx;then
    uci set dhcp.lan.ignore='1'
    uci commit dhcp
fi

至于判断逻辑，不依靠op编译的命令的话，可以 /sys/class/net 目录信息作为依据，下面这个命令就是打印网口信息

ls -l /sys/class/net/ | awk '$NF~/\/devices\/(platform|pci)/{print $9}'

不过例如N1，情况特殊

root@OpenWrt:~# ls -l /sys/class/net/ | awk '$NF~/\/devices\/(platform|pci)/{print $9}'
eth0
wlan0
root@OpenWrt:~# ls -l /sys/class/net/
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 bond0 -> ../../devices/virtual/net/bond0
-rw-r--r--    1 root     root          4096 Oct  8 20:56 bonding_masters
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 docker0 -> ../../devices/virtual/net/docker0
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 dummy0 -> ../../devices/virtual/net/dummy0
lrwxrwxrwx    1 root     root             0 Jan  1  1970 eth0 -> ../../devices/platform/soc/c9410000.ethernet/net/eth0
lrwxrwxrwx    1 root     root             0 Jan  1  1970 ip6tnl0 -> ../../devices/virtual/net/ip6tnl0
lrwxrwxrwx    1 root     root             0 Jan  1  1970 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx    1 root     root             0 Jan  1  1970 sit0 -> ../../devices/virtual/net/sit0
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 tunl0 -> ../../devices/virtual/net/tunl0
lrwxrwxrwx    1 root     root             0 Oct  8 20:56 wg0 -> ../../devices/virtual/net/wg0
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 wlan0 -> ../../devices/platform/soc/d0000000.apb/d0070000.mmc/mmc_host/mmc0/mmc0:0001/mmc0:0001:1/net/wlan0

下面是我的sft1200的信息

root@xxx:~# ls -l /sys/class/net/
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 br-lan -> ../../devices/virtual/net/br-lan
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 eth0 -> ../../devices/platform/10800000.gmac/net/eth0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 eth0.1 -> ../../devices/virtual/net/eth0.1
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 eth0.2 -> ../../devices/virtual/net/eth0.2
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 ifb0 -> ../../devices/virtual/net/ifb0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 ifb1 -> ../../devices/virtual/net/ifb1
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 teql0 -> ../../devices/virtual/net/teql0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 wg0 -> ../../devices/virtual/net/wg0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 wlan0 -> ../../devices/platform/17800000.wifi-hb/net/wlan0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 wlan1 -> ../../devices/platform/11000000.wifi-lb/net/wlan1
root@xxx:~# ls -l /sys/class/net/ | awk '$NF~/\/devices\/(platform|pci)/{print $9}'
eth0
wlan0
wlan1

zhangguanzhang avatar Nov 02 '22 01:11 zhangguanzhang 

# 通过 opkg search 配置文件找到属于dnsmasq的包
$ opkg search /etc/config/dhcp
dnsmasq-full - 2.86-13
# 源码里搜
$ find -type d -name 'dnsmasq*'
./package/network/services/dnsmasq
# 进目录找到文件
$ cat package/network/services/dnsmasq/files/dhcp.conf

主要是

config dhcp 'lan'
	option interface 'lan'
	option ignore '1'

另一种方法是用 uci-defaults，也就是源码目录存放 files/etc/uci-defaults/zzz-default-settings.sh 一个shell文件，名字的字母让排序是最后，里面写

uci set dhcp.lan.ignore='1'
uci commit dhcp

当然，最人性化的是 uci-defaults 的脚本里上面的逻辑外面加一个判断，如果只有一个网口才取消lan的dhcp

您好呀，前面的我通过学习openwrt的官方文档我会了。但是我就是不会最后一个，就是，逻辑判断，人性化地判断网口的数量。 我是这样设置的

# 设置自定义dhcp
cat > $lede/lede/package/base-files/files/etc/uci-defaults/80_customized << "EOF"

uci add_list dhcp.lan.dhcp_option="6,119.29.29.29,223.5.5.5"

uci add dhcp domain
uci set dhcp.@domain[-1].name="xxxxxxx.com"
uci set dhcp.@domain[-1].ip="192.168.50.1"
uci delete dhcp.@dnsmasq[0].filter_aaaa

uci commit dhcp

## uci delete dhcp.dnsmasq..option.filter_aaaa 这是自己的学习的记录

exit 0

EOF

if xxx;then
    uci set dhcp.lan.ignore='1'
    uci commit dhcp
fi

至于判断逻辑，不依靠op编译的命令的话，可以 /sys/class/net 目录信息作为依据，下面这个命令就是打印网口信息

ls -l /sys/class/net/ | awk '$NF~/\/devices\/(platform|pci)/{print $9}'

不过例如N1，情况特殊

root@OpenWrt:~# ls -l /sys/class/net/ | awk '$NF~/\/devices\/(platform|pci)/{print $9}'
eth0
wlan0
root@OpenWrt:~# ls -l /sys/class/net/
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 bond0 -> ../../devices/virtual/net/bond0
-rw-r--r--    1 root     root          4096 Oct  8 20:56 bonding_masters
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 docker0 -> ../../devices/virtual/net/docker0
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 dummy0 -> ../../devices/virtual/net/dummy0
lrwxrwxrwx    1 root     root             0 Jan  1  1970 eth0 -> ../../devices/platform/soc/c9410000.ethernet/net/eth0
lrwxrwxrwx    1 root     root             0 Jan  1  1970 ip6tnl0 -> ../../devices/virtual/net/ip6tnl0
lrwxrwxrwx    1 root     root             0 Jan  1  1970 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx    1 root     root             0 Jan  1  1970 sit0 -> ../../devices/virtual/net/sit0
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 tunl0 -> ../../devices/virtual/net/tunl0
lrwxrwxrwx    1 root     root             0 Oct  8 20:56 wg0 -> ../../devices/virtual/net/wg0
lrwxrwxrwx    1 root     root             0 Oct  1 05:03 wlan0 -> ../../devices/platform/soc/d0000000.apb/d0070000.mmc/mmc_host/mmc0/mmc0:0001/mmc0:0001:1/net/wlan0

下面是我的sft1200的信息

root@xxx:~# ls -l /sys/class/net/
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 br-lan -> ../../devices/virtual/net/br-lan
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 eth0 -> ../../devices/platform/10800000.gmac/net/eth0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 eth0.1 -> ../../devices/virtual/net/eth0.1
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 eth0.2 -> ../../devices/virtual/net/eth0.2
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 ifb0 -> ../../devices/virtual/net/ifb0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 ifb1 -> ../../devices/virtual/net/ifb1
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 teql0 -> ../../devices/virtual/net/teql0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 wg0 -> ../../devices/virtual/net/wg0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 wlan0 -> ../../devices/platform/17800000.wifi-hb/net/wlan0
lrwxrwxrwx    1 root     root             0 Nov  2 09:37 wlan1 -> ../../devices/platform/11000000.wifi-lb/net/wlan1
root@xxx:~# ls -l /sys/class/net/ | awk '$NF~/\/devices\/(platform|pci)/{print $9}'
eth0
wlan0
wlan1

就是这一段里面的xxx如何写，我不会xxx的这个表达式。

if xxx;then
    uci set dhcp.lan.ignore='1'
    uci commit dhcp
fi

adamgonglj avatar Nov 02 '22 03:11 adamgonglj

linux的wc命令能统计行数，去学下shell

zhangguanzhang avatar Nov 02 '22 03:11 zhangguanzhang

好的，感谢，我去查一下wc这个命令

adamgonglj avatar Nov 02 '22 07:11 adamgonglj

可以用 lspci | grep eth命令

adamgonglj avatar Nov 02 '22 07:11 adamgonglj

if [ lspci |grep -i eth | wc -l ]==1

adamgonglj avatar Nov 02 '22 08:11 adamgonglj

if [ $(lspci | grep -i eth | wc -l) -eq 1 ] ; then uci set dhcp.lan.ignore='1' uci commit dhcp fi

adamgonglj avatar Nov 02 '22 08:11 adamgonglj

那如果固件没 lspci 命令呢

zhangguanzhang avatar Nov 02 '22 09:11 zhangguanzhang

这个我再研究一下，实在没有，那就用openwrt的基本命令喽。

adamgonglj avatar Nov 02 '22 09:11 adamgonglj 

if [ $(ifconfig | grep eth | wc -l) -eq 1 ] ; then
uci set dhcp.lan.ignore='1'
uci commit dhcp
fi

adamgonglj avatar Nov 02 '22 10:11 adamgonglj

如果网卡名不叫eth呢，可能是ens啥的

zhangguanzhang avatar Nov 02 '22 11:11 zhangguanzhang

如果网卡名不叫eth呢，可能是ens啥的

那。。。。。哎，我就不懂了。

adamgonglj avatar Nov 02 '22 12:11 adamgonglj 

if [ $(ifconfig | grep -E "(eth|ens)" | wc -l) -eq 1 ] ; then
uci set dhcp.lan.ignore='1'
uci commit dhcp
fi

adamgonglj avatar Nov 02 '22 15:11 adamgonglj