mirror of
https://github.com/bol-van/zapret.git
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54 lines
1.5 KiB
Bash
54 lines
1.5 KiB
Bash
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set_conntrack_liberal_mode()
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{
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[ -n "$SKIP_CONNTRACK_LIBERAL_MODE" ] || sysctl -w net.netfilter.nf_conntrack_tcp_be_liberal=$1
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}
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zapret_do_firewall()
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{
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linux_fwtype
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[ "$1" = 1 -a -n "$INIT_FW_PRE_UP_HOOK" ] && $INIT_FW_PRE_UP_HOOK
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[ "$1" = 0 -a -n "$INIT_FW_PRE_DOWN_HOOK" ] && $INIT_FW_PRE_DOWN_HOOK
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case "$FWTYPE" in
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iptables)
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zapret_do_firewall_ipt "$@"
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;;
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nftables)
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zapret_do_firewall_nft "$@"
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;;
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esac
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# russian DPI sends RST,ACK with wrong ACK.
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# this is sometimes treated by conntrack as invalid and connbytes fw rules do not pass RST packet to nfqws.
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# switch on liberal mode on zapret firewall start and switch off on zapret firewall stop
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# this is only required for processing incoming bad RSTs. incoming rules are only applied in autohostlist mode
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# calling this after firewall because conntrack module can be not loaded before applying conntrack firewall rules
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[ "$MODE_FILTER" = "autohostlist" -a "$MODE" != tpws -a "$MODE" != tpws-socks ] && set_conntrack_liberal_mode $1
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[ "$1" = 1 -a -n "$INIT_FW_POST_UP_HOOK" ] && $INIT_FW_POST_UP_HOOK
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[ "$1" = 0 -a -n "$INIT_FW_POST_DOWN_HOOK" ] && $INIT_FW_POST_DOWN_HOOK
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return 0
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}
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zapret_apply_firewall()
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{
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zapret_do_firewall 1 "$@"
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}
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zapret_unapply_firewall()
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{
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zapret_do_firewall 0 "$@"
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}
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first_packets_for_mode()
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{
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# autohostlist and autottl modes requires incoming traffic sample
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# always use conntrack packet limiter or nfqws will deal with gigabytes
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local n
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if [ "$MODE_FILTER" = "autohostlist" ]; then
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n=$((6+${AUTOHOSTLIST_RETRANS_THRESHOLD:-3}))
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else
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n=6
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fi
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echo $n
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}
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