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https://github.com/bol-van/zapret.git
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65 lines
929 B
Bash
65 lines
929 B
Bash
linux_ipt_avail()
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{
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exists iptables && exists ip6tables
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}
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linux_maybe_iptables_fwtype()
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{
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linux_ipt_avail && FWTYPE=iptables
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}
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linux_nft_avail()
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{
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exists nft
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}
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linux_fwtype()
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{
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[ -n "$FWTYPE" ] && return
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FWTYPE=unsupported
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linux_get_subsys
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if [ "$SUBSYS" = openwrt ] ; then
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# linux kernel is new enough if fw4 is there
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if [ -x /sbin/fw4 ] && linux_nft_avail ; then
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FWTYPE=nftables
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else
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linux_maybe_iptables_fwtype
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fi
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else
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SUBSYS=
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# generic linux
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# flowtable is implemented since kernel 4.16
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if linux_nft_avail && linux_min_version 4 16; then
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FWTYPE=nftables
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else
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linux_maybe_iptables_fwtype
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fi
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fi
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export FWTYPE
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}
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get_fwtype()
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{
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[ -n "$FWTYPE" ] && return
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local UNAME="$(uname)"
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case "$UNAME" in
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Linux)
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linux_fwtype
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;;
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FreeBSD)
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if exists ipfw ; then
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FWTYPE=ipfw
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else
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FWTYPE=unsupported
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fi
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;;
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*)
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FWTYPE=unsupported
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;;
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esac
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export FWTYPE
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}
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