mirror of
https://github.com/bol-van/zapret.git
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67 lines
2.4 KiB
Plaintext
67 lines
2.4 KiB
Plaintext
# 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 the first outgoing packet 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 was first intended for TSPU but it appeared that it's overkill
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# it's enough to send short header fake before initial
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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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