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https://github.com/bol-van/zapret.git
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blockcheck: restrict fooling only to domain's IPs
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bol-van
parent
8446470de3
commit
6e8dbb045a
127
blockcheck.sh
127
blockcheck.sh
@ -58,6 +58,8 @@ DNSCHECK_DIG1=/tmp/dig1.txt
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DNSCHECK_DIG2=/tmp/dig2.txt
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DNSCHECK_DIGS=/tmp/digs.txt
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IPSET_FILE=/tmp/blockcheck_ipset.txt
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unset PF_STATUS
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PF_RULES_SAVE=/tmp/pf-zapret-save.conf
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@ -130,19 +132,22 @@ opf_dvtws_anchor()
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{
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# $1 - tcp/udp
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# $2 - port
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local family=inet
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# $3 - ip list
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local iplist family=inet
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[ "$IPV" = 6 ] && family=inet6
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make_comma_list iplist "$3"
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echo "set reassemble no"
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[ "$1" = tcp ] && echo "pass in quick $family proto $1 from port $2 flags SA/SA divert-packet port $IPFW_DIVERT_PORT no state"
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echo "pass in quick $family proto $1 from port $2 no state"
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echo "pass out quick $family proto $1 to port $2 divert-packet port $IPFW_DIVERT_PORT no state"
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[ "$1" = tcp ] && echo "pass in quick $family proto $1 from {$iplist} port $2 flags SA/SA divert-packet port $IPFW_DIVERT_PORT no state"
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echo "pass in quick $family proto $1 from {$iplist} port $2 no state"
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echo "pass out quick $family proto $1 to {$iplist} port $2 divert-packet port $IPFW_DIVERT_PORT no state"
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echo "pass"
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}
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opf_prepare_dvtws()
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{
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# $1 - tcp/udp
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# $2 - port
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opf_dvtws_anchor $1 $2 | pfctl -qf -
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# $3 - ip list
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opf_dvtws_anchor $1 $2 "$3" | pfctl -qf -
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pfctl -qe
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}
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@ -700,13 +705,12 @@ curl_test_http3()
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curl_with_dig $1 $2 $QUIC_PORT -ISs -A "$USER_AGENT" --max-time $CURL_MAX_TIME_QUIC --http3-only $CURL_OPT "https://$2" -o /dev/null 2>&1
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}
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ipt_scheme()
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ipt_aux_scheme()
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{
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# $1 - 1 - add , 0 - del
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# $2 - tcp/udp
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# $3 - port
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IPT_ADD_DEL $1 OUTPUT -t mangle -p $2 --dport $3 -m mark ! --mark $DESYNC_MARK/$DESYNC_MARK -j NFQUEUE --queue-num $QNUM
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# to avoid possible INVALID state drop
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[ "$2" = tcp ] && IPT_ADD_DEL $1 INPUT -p $2 --sport $3 ! --syn -j ACCEPT
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# for strategies with incoming packets involved (autottl)
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@ -722,13 +726,42 @@ ipt_scheme()
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# raw table may not be present
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IPT_ADD_DEL $1 OUTPUT -t raw -m mark --mark $DESYNC_MARK/$DESYNC_MARK -j CT --notrack
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}
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ipt_scheme()
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{
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# $1 - tcp/udp
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# $2 - port
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# $3 - ip list
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local ip
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$IPTABLES -t mangle -N blockcheck_output 2>/dev/null
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$IPTABLES -t mangle -F blockcheck_output
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IPT OUTPUT -t mangle -j blockcheck_output
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# prevent loop
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$IPTABLES -t mangle -A blockcheck_output -m mark --mark $DESYNC_MARK/$DESYNC_MARK -j RETURN
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$IPTABLES -t mangle -A blockcheck_output ! -p $1 -j RETURN
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$IPTABLES -t mangle -A blockcheck_output -p $1 ! --dport $2 -j RETURN
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for ip in $3; do
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$IPTABLES -t mangle -A blockcheck_output -d $ip -j NFQUEUE --queue-num $QNUM
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done
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ipt_aux_scheme 1 $1 $2
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}
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nft_scheme()
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{
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# $1 - tcp/udp
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# $2 - port
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# $3 - ip list
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local iplist ipver=$IPV
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[ "$IPV" = 6 ] || ipver=
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make_comma_list iplist $3
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nft add table inet $NFT_TABLE
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nft "add chain inet $NFT_TABLE postnat { type filter hook output priority 102; }"
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nft "add rule inet $NFT_TABLE postnat meta nfproto ipv${IPV} $1 dport $2 mark and $DESYNC_MARK != $DESYNC_MARK queue num $QNUM"
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nft "add rule inet $NFT_TABLE postnat meta nfproto ipv${IPV} $1 dport $2 mark and $DESYNC_MARK != $DESYNC_MARK ip${ipver} daddr {$iplist} queue num $QNUM"
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# for strategies with incoming packets involved (autottl)
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nft "add chain inet $NFT_TABLE prenat { type filter hook prerouting priority -102; }"
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# enable everything generated by nfqws (works only in OUTPUT, not in FORWARD)
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@ -740,23 +773,33 @@ pktws_ipt_prepare()
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{
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# $1 - tcp/udp
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# $2 - port
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# $3 - ip list
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local ip
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case "$FWTYPE" in
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iptables)
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ipt_scheme 1 $1 $2
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ipt_scheme $1 $2 "$3"
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;;
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nftables)
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nft_scheme $1 $2
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nft_scheme $1 $2 "$3"
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;;
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ipfw)
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# disable PF to avoid interferences
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pf_is_avail && pfctl -qd
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IPFW_ADD divert $IPFW_DIVERT_PORT $1 from me to any $2 proto ip${IPV} out not diverted not sockarg
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for ip in $3; do
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IPFW_ADD divert $IPFW_DIVERT_PORT $1 from me to $ip $2 proto ip${IPV} out not diverted not sockarg
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done
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;;
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opf)
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opf_prepare_dvtws $1 $2
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opf_prepare_dvtws $1 $2 "$3"
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;;
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windivert)
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WF="--wf-l3=ipv${IPV} --wf-${1}=$2"
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rm -f "$IPSET_FILE"
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for ip in $3; do
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echo $ip >>"$IPSET_FILE"
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done
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;;
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esac
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@ -765,9 +808,13 @@ pktws_ipt_unprepare()
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{
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# $1 - tcp/udp
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# $2 - port
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case "$FWTYPE" in
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iptables)
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ipt_scheme 0 $1 $2
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ipt_aux_scheme 0 $1 $2
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IPT_DEL OUTPUT -t mangle -j blockcheck_output
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$IPTABLES -t mangle -F blockcheck_output 2>/dev/null
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$IPTABLES -t mangle -X blockcheck_output 2>/dev/null
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;;
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nftables)
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nft delete table inet $NFT_TABLE 2>/dev/null
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@ -781,6 +828,7 @@ pktws_ipt_unprepare()
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;;
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windivert)
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unset WF
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rm -f "$IPSET_FILE"
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;;
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esac
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}
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@ -788,21 +836,37 @@ pktws_ipt_unprepare()
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pktws_ipt_prepare_tcp()
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{
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# $1 - port
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# $2 - ip list
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pktws_ipt_prepare tcp $1
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local ip iplist ipver
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pktws_ipt_prepare tcp $1 "$2"
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case "$FWTYPE" in
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iptables)
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# for autottl
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IPT INPUT -t mangle -p tcp --sport $1 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:1 -j NFQUEUE --queue-num $QNUM
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$IPTABLES -N blockcheck_input -t mangle 2>/dev/null
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$IPTABLES -F blockcheck_input -t mangle 2>/dev/null
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IPT INPUT -t mangle -j blockcheck_input
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$IPTABLES -t mangle -A blockcheck_input ! -p tcp -j RETURN
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$IPTABLES -t mangle -A blockcheck_input -p tcp ! --sport $1 -j RETURN
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$IPTABLES -t mangle -A blockcheck_input -m connbytes --connbytes-dir=reply --connbytes-mode=packets ! --connbytes 1 -j RETURN
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for ip in $2; do
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$IPTABLES -A blockcheck_input -t mangle -s $ip -j NFQUEUE --queue-num $QNUM
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done
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;;
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nftables)
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ipver=$IPV
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[ "$IPV" = 6 ] || ipver=
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# for autottl
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nft "add rule inet $NFT_TABLE prenat meta nfproto ipv${IPV} tcp sport $1 ct original packets 1 queue num $QNUM"
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make_comma_list iplist $2
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nft "add rule inet $NFT_TABLE prenat meta nfproto ipv${IPV} tcp sport $1 ip${ipver} saddr {$iplist} ct original packets 1 queue num $QNUM"
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;;
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ipfw)
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# for autottl mode
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IPFW_ADD divert $IPFW_DIVERT_PORT tcp from any $1 to me proto ip${IPV} tcpflags syn,ack in not diverted not sockarg
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for ip in $2; do
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IPFW_ADD divert $IPFW_DIVERT_PORT tcp from $ip $1 to me proto ip${IPV} tcpflags syn,ack in not diverted not sockarg
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done
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;;
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esac
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}
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@ -814,15 +878,18 @@ pktws_ipt_unprepare_tcp()
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case "$FWTYPE" in
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iptables)
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IPT_DEL INPUT -t mangle -p tcp --sport $1 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:1 -j NFQUEUE --queue-num $QNUM
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IPT_DEL INPUT -t mangle -j blockcheck_input
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$IPTABLES -t mangle -F blockcheck_input 2>/dev/null
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$IPTABLES -t mangle -X blockcheck_input 2>/dev/null
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;;
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esac
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}
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pktws_ipt_prepare_udp()
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{
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# $1 - port
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# $2 - ip list
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pktws_ipt_prepare udp $1
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pktws_ipt_prepare udp $1 "$2"
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}
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pktws_ipt_unprepare_udp()
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{
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@ -841,7 +908,7 @@ pktws_start()
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"$DVTWS" --port=$IPFW_DIVERT_PORT "$@" >/dev/null &
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;;
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CYGWIN)
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"$WINWS" $WF "$@" >/dev/null &
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"$WINWS" $WF --ipset="$IPSET_FILE" "$@" >/dev/null &
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;;
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esac
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PID=$!
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@ -1413,7 +1480,7 @@ check_domain_http_tcp()
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[ "$SKIP_PKTWS" = 1 ] || {
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echo
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echo preparing $PKTWSD redirection
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pktws_ipt_prepare_tcp $2
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pktws_ipt_prepare_tcp $2 "$(mdig_resolve_all $IPV $4)"
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pktws_check_domain_http_bypass $1 $3 $4
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@ -1436,7 +1503,7 @@ check_domain_http_udp()
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[ "$SKIP_PKTWS" = 1 ] || {
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echo
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echo preparing $PKTWSD redirection
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pktws_ipt_prepare_udp $2
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pktws_ipt_prepare_udp $2 "$(mdig_resolve_all $IPV $3)"
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pktws_check_domain_http3_bypass $1 $3
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@ -1756,7 +1823,7 @@ check_dns_cleanup()
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{
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rm -f "$DNSCHECK_DIG1" "$DNSCHECK_DIG2" "$DNSCHECK_DIGS" 2>/dev/null
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}
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check_dns()
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check_dns_()
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{
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local C1 C2 dom
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@ -1799,8 +1866,8 @@ check_dns()
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for dom in $DNSCHECK_DOM; do echo $dom; done | "$MDIG" --threads=10 --family=4 >"$DNSCHECK_DIGS"
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fi
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echo checking resolved IP uniqueness for : $DNSCHECK_DOM
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echo censor\'s DNS can return equal result for multiple blocked domains.
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echo "checking resolved IP uniqueness for : $DNSCHECK_DOM"
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echo "censor's DNS can return equal result for multiple blocked domains."
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C1=$(wc -l <"$DNSCHECK_DIGS")
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C2=$(sort -u "$DNSCHECK_DIGS" | wc -l)
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[ "$C1" -eq 0 ] &&
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@ -1828,6 +1895,14 @@ check_dns()
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return 0
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}
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check_dns()
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{
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local r
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check_dns_
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r=$?
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[ "$SECURE_DNS" = 1 ] && doh_find_working
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return $r
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}
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unprepare_all()
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{
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@ -1860,6 +1935,7 @@ sigsilent()
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exit 1
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}
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fsleep_setup
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fix_sbin_path
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check_system
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@ -1868,7 +1944,6 @@ check_already
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check_prerequisites
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trap sigint_cleanup INT
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check_dns
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[ "$SECURE_DNS" = 1 ] && doh_find_working
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check_virt
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ask_params
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trap - INT
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