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https://github.com/bol-van/zapret.git
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TSPU QUIC block bypass custom script
This commit is contained in:
bol-van
parent
01ec94806d
commit
ef669a15a5
@ -129,7 +129,7 @@ _fw_tpws4()
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# $3 - tpws port
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# $4 - lan interface names space separated
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# $5 - wan interface names space separated
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[ "$DISABLE_IPV4" = "1" ] || {
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[ "$DISABLE_IPV4" = "1" -o -z "$2" ] || {
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local i rule
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[ "$1" = 1 ] && prepare_tpws_fw4
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@ -159,7 +159,7 @@ _fw_tpws6()
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# $4 - lan interface names space separated
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# $5 - wan interface names space separated
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[ "$DISABLE_IPV6" = "1" ] || {
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[ "$DISABLE_IPV6" = "1" -o -z "$2" ] || {
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local i rule DNAT6
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ipt_print_op $1 "$2" "tpws (port $3)" 6
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@ -197,7 +197,7 @@ _fw_nfqws_post4()
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# $2 - iptable filter for ipv4
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# $3 - queue number
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# $4 - wan interface names space separated
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[ "$DISABLE_IPV4" = "1" ] || {
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[ "$DISABLE_IPV4" = "1" -o -z "$2" ] || {
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local i
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ipt_print_op $1 "$2" "nfqws postrouting (qnum $3)"
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@ -218,7 +218,7 @@ _fw_nfqws_post6()
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# $2 - iptable filter for ipv6
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# $3 - queue number
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# $4 - wan interface names space separated
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[ "$DISABLE_IPV6" = "1" ] || {
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[ "$DISABLE_IPV6" = "1" -o -z "$2" ] || {
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local i
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ipt_print_op $1 "$2" "nfqws postrouting (qnum $3)" 6
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@ -83,16 +83,20 @@ cat << EOF | nft -f -
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add rule inet $ZAPRET_NFT_TABLE localnet_protect ip daddr $TPWS_LOCALHOST4 return comment "route_localnet allow access to tpws"
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add rule inet $ZAPRET_NFT_TABLE localnet_protect ip daddr 127.0.0.0/8 drop comment "route_localnet remote access protection"
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add rule inet $ZAPRET_NFT_TABLE input iif != lo jump localnet_protect
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add chain inet $ZAPRET_NFT_TABLE postrouting { type filter hook postrouting priority 101; }
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add chain inet $ZAPRET_NFT_TABLE postrouting { type filter hook postrouting priority 99; }
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flush chain inet $ZAPRET_NFT_TABLE postrouting
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add chain inet $ZAPRET_NFT_TABLE predefrag { type filter hook output priority -401; }
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flush chain inet $ZAPRET_NFT_TABLE predefrag
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add rule inet $ZAPRET_NFT_TABLE predefrag mark and $DESYNC_MARK !=0 notrack comment "do not track nfqws generated packets to avoid nat tampering and defragmentation"
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add set inet $ZAPRET_NFT_TABLE lanif { type ifname; }
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add set inet $ZAPRET_NFT_TABLE wanif { type ifname; }
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add set inet $ZAPRET_NFT_TABLE wanif6 { type ifname; }
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add map inet $ZAPRET_NFT_TABLE link_local { type ifname : ipv6_addr; }
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EOF
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# unfortunately this approach breaks udp desync of the connection initiating packet (new, first one)
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# however without notrack ipfrag will not work
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# postrouting priority : 99 - before srcnat, 101 - after srcnat
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# add chain inet $ZAPRET_NFT_TABLE predefrag { type filter hook output priority -401; }
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# flush chain inet $ZAPRET_NFT_TABLE predefrag
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# add rule inet $ZAPRET_NFT_TABLE predefrag mark and $DESYNC_MARK !=0 notrack comment "do not track nfqws generated packets to avoid nat tampering and defragmentation"
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}
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nft_del_chains()
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{
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@ -206,6 +210,14 @@ nft_add_nfqws_flow_exempt_rule()
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# do not need this because of oifname @wanif/@wanif6 filter in forward chain
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#nft_add_rule flow_offload $(nft_reverse_nfqws_rule $1) return comment \"reverse flow offloading exemption\"
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}
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nft_add_flow_offload_exemption()
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{
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# "$1" - rule for ipv4
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# "$2" - rule for ipv6
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# "$3" - comment
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[ "$DISABLE_IPV4" = "1" -o -z "$1" ] || nft_add_rule flow_offload oifname @wanif $1 ip daddr != @nozapret return comment \"$3\"
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[ "$DISABLE_IPV6" = "1" -o -z "$2" ] || nft_add_rule flow_offload oifname @wanif6 $2 ip6 daddr != @nozapret6 return comment \"$3\"
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}
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nft_hw_offload_supported()
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{
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@ -351,7 +363,7 @@ _nft_fw_tpws4()
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# $2 - tpws port
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# $3 - not-empty if wan interface filtering required
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[ "$DISABLE_IPV4" = "1" ] || {
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[ "$DISABLE_IPV4" = "1" -o -z "$1" ] || {
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local filter="$1" port="$2"
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nft_print_op "$filter" "tpws (port $2)" 4
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nft_add_rule dnat_output skuid != $WS_USER ${3:+oifname @wanif }$filter ip daddr != @nozapret dnat ip to $TPWS_LOCALHOST4:$port
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@ -366,7 +378,7 @@ _nft_fw_tpws6()
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# $3 - lan interface names space separated
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# $4 - not-empty if wan interface filtering required
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[ "$DISABLE_IPV6" = "1" ] || {
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[ "$DISABLE_IPV6" = "1" -o -z "$1" ] || {
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local filter="$1" port="$2" DNAT6 i
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nft_print_op "$filter" "tpws (port $port)" 6
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nft_add_rule dnat_output skuid != $WS_USER ${4:+oifname @wanif6 }$filter ip6 daddr != @nozapret6 dnat ip6 to [::1]:$port
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@ -396,7 +408,7 @@ _nft_fw_nfqws_post4()
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# $2 - queue number
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# $3 - not-empty if wan interface filtering required
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[ "$DISABLE_IPV4" = "1" ] || {
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[ "$DISABLE_IPV4" = "1" -o -z "$1" ] || {
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local filter="$1" port="$2" rule
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nft_print_op "$filter" "nfqws postrouting (qnum $port)" 4
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rule="${3:+oifname @wanif }$filter ip daddr != @nozapret"
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@ -410,7 +422,7 @@ _nft_fw_nfqws_post6()
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# $2 - queue number
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# $3 - not-empty if wan interface filtering required
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[ "$DISABLE_IPV6" = "1" ] || {
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[ "$DISABLE_IPV6" = "1" -o -z "$1" ] || {
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local filter="$1" port="$2" rule
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nft_print_op "$filter" "nfqws postrouting (qnum $port)" 6
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rule="${3:+oifname @wanif6 }$filter ip6 daddr != @nozapret6"
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BIN
files/fake/quic_short_header.bin
Normal file
BIN
files/fake/quic_short_header.bin
Normal file
Binary file not shown.
66
init.d/openwrt/custom-nfqws-quic4all-tspu
Normal file
66
init.d/openwrt/custom-nfqws-quic4all-tspu
Normal file
@ -0,0 +1,66 @@
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# this custom script in addition to MODE=nfqws runs desync to all QUIC initial packets, without ipset/hostlist filtering
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# and also sends special fake on outgoing packets with short header and udp.length>=600
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# need to add to config : NFQWS_OPT_DESYNC_QUIC="--dpi-desync=fake"
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# need to add to config : NFQWS_OPT_DESYNC_QUIC_SHORT_HEADER="--dpi-desync=fake --dpi-desync-any-protocol --dpi-desync-fake-unknown-udp=/opt/zapret/files/fake/quic_short_header.bin --dpi-desync-cutoff=n2"
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# NOTE : do not use TTL fooling. chromium QUIC engine breaks sessions if TTL expired in transit received
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# this hack is for russian TSPU QUIC blocking
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# without additional short header fake connections randomly hang
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QNUM2=$(($QNUM+10))
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QNUM3=$(($QNUM+11))
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zapret_custom_daemons()
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{
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# stop logic is managed by procd
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local MODE_OVERRIDE=nfqws
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local opt
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start_daemons_procd
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opt="--qnum=$QNUM2 $NFQWS_OPT_BASE $NFQWS_OPT_DESYNC_QUIC"
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run_daemon 100 $NFQWS "$opt"
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opt="--qnum=$QNUM3 $NFQWS_OPT_BASE $NFQWS_OPT_DESYNC_QUIC_SHORT_HEADER"
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run_daemon 101 $NFQWS "$opt"
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}
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zapret_custom_firewall()
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{
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# $1 - 1 - run, 0 - stop
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local MODE_OVERRIDE=nfqws
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local f
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local first_packets_only="-m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:3"
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local desync="-m mark ! --mark $DESYNC_MARK/$DESYNC_MARK"
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local udplen="-m length --length 600:1500"
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local short_header4="-m u32 --u32 0>>22&0x3C@8>>24&0xC0=0x40"
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zapret_do_firewall_rules_ipt $1
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f="-p udp --dport 443"
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fw_nfqws_post $1 "$f $desync $first_packets_only" "$f $desync $first_packets_only" $QNUM2
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# this for ipv4 only. do not have access to ipv6 enabled TSPU to test
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fw_nfqws_post $1 "$f $desync $udplen $short_header4" "" $QNUM3
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}
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zapret_custom_firewall_nft()
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{
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# stop logic is not required
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local MODE_OVERRIDE=nfqws
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local f
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local first_packets_only="ct original packets 1-3"
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local desync="mark and $DESYNC_MARK == 0"
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local udplen="udp length 600-1500"
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local short_header4="@th,64,2 1"
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zapret_apply_firewall_rules_nft
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f="udp dport 443"
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nft_fw_nfqws_post $1 "$f $desync $first_packets_only" "$f $desync $first_packets_only" $QNUM2
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# this for ipv4 only. do not have access to ipv6 enabled TSPU to test
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nft_fw_nfqws_post $1 "$f $desync $udplen $short_header4" "" $QNUM3
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# add flow offload exemption for the whole stream because we dont know when short_header rule triggers
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nft_add_flow_offload_exemption "$f" "" "QUIC exemption for complex TSPU hack"
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}
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66
init.d/sysv/custom-nfqws-quic4all-tspu
Normal file
66
init.d/sysv/custom-nfqws-quic4all-tspu
Normal file
@ -0,0 +1,66 @@
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# this custom script in addition to MODE=nfqws runs desync to all QUIC initial packets, without ipset/hostlist filtering
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# and also sends special fake on outgoing packets with short header and udp.length>=600
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# need to add to config : NFQWS_OPT_DESYNC_QUIC="--dpi-desync=fake"
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# need to add to config : NFQWS_OPT_DESYNC_QUIC_SHORT_HEADER="--dpi-desync=fake --dpi-desync-any-protocol --dpi-desync-fake-unknown-udp=/opt/zapret/files/fake/quic_short_header.bin --dpi-desync-cutoff=n2"
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# NOTE : do not use TTL fooling. chromium QUIC engine breaks sessions if TTL expired in transit received
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# this hack is for russian TSPU QUIC blocking
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# without additional short header fake connections randomly hang
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QNUM2=$(($QNUM+10))
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QNUM3=$(($QNUM+11))
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zapret_custom_daemons()
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{
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# stop logic is managed by procd
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local MODE_OVERRIDE=nfqws
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local opt
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zapret_do_daemons $1
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opt="--qnum=$QNUM2 $NFQWS_OPT_BASE $NFQWS_OPT_DESYNC_QUIC"
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do_nfqws $1 100 "$opt"
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opt="--qnum=$QNUM3 $NFQWS_OPT_BASE $NFQWS_OPT_DESYNC_QUIC_SHORT_HEADER"
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do_nfqws $1 101 "$opt"
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}
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zapret_custom_firewall()
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{
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# $1 - 1 - run, 0 - stop
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local MODE_OVERRIDE=nfqws
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local f
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local first_packets_only="-m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:3"
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local desync="-m mark ! --mark $DESYNC_MARK/$DESYNC_MARK"
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local udplen="-m length --length 600:1500"
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local short_header4="-m u32 --u32 0>>22&0x3C@8>>24&0xC0=0x40"
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zapret_do_firewall_rules_ipt $1
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f="-p udp --dport 443"
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fw_nfqws_post $1 "$f $desync $first_packets_only" "$f $desync $first_packets_only" $QNUM2
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# this for ipv4 only. do not have access to ipv6 enabled TSPU to test
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fw_nfqws_post $1 "$f $desync $udplen $short_header4" "" $QNUM3
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}
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zapret_custom_firewall_nft()
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{
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# stop logic is not required
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local MODE_OVERRIDE=nfqws
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local f
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local first_packets_only="ct original packets 1-3"
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local desync="mark and $DESYNC_MARK == 0"
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local udplen="udp length 600-1500"
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local short_header4="@th,64,2 1"
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zapret_apply_firewall_rules_nft
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f="udp dport 443"
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nft_fw_nfqws_post $1 "$f $desync $first_packets_only" "$f $desync $first_packets_only" $QNUM2
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# this for ipv4 only. do not have access to ipv6 enabled TSPU to test
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nft_fw_nfqws_post $1 "$f $desync $udplen $short_header4" "" $QNUM3
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# add flow offload exemption for the whole stream because we dont know when short_header rule triggers
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nft_add_flow_offload_exemption "$f" "" "QUIC exemption for complex TSPU hack"
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}
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