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bol-van
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@ -89,6 +89,14 @@ filter_apply_ipset_target()
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filter_apply_ipset_target6 $2
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}
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reverse_nfqws_rule_stream()
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{
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sed -e 's/-o /-i /g' -e 's/--dport /--sport /g' -e 's/--dports /--sports /g' -e 's/ dst$/ src/' -e 's/ dst / src /g' -e 's/--connbytes-dir=original/--connbytes-dir=reply/g' -e "s/-m mark ! --mark $DESYNC_MARK\/$DESYNC_MARK//g"
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}
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reverse_nfqws_rule()
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{
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echo "$@" | reverse_nfqws_rule_stream
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}
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prepare_tpws_fw4()
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{
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@ -250,14 +258,81 @@ fw_nfqws_post()
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fw_nfqws_post6 $1 "$3" $4
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}
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_fw_nfqws_pre4()
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{
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# $1 - 1 - add, 0 - del
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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" -o -z "$2" ] || {
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local i
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ipt_print_op $1 "$2" "nfqws input+forward (qnum $3)"
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rule="$2 $IPSET_EXCLUDE src -j NFQUEUE --queue-num $3 --queue-bypass"
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if [ -n "$4" ] ; then
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for i in $4; do
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# iptables PREROUTING chain is before NAT. not possible to have DNATed ip's there
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ipt_add_del $1 INPUT -t mangle -i $i $rule
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ipt_add_del $1 FORWARD -t mangle -i $i $rule
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done
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else
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ipt_add_del $1 INPUT -t mangle $rule
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ipt_add_del $1 FORWARD -t mangle $rule
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fi
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}
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}
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_fw_nfqws_pre6()
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{
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# $1 - 1 - add, 0 - del
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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" -o -z "$2" ] || {
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local i
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ipt_print_op $1 "$2" "nfqws input+forward (qnum $3)" 6
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rule="$2 $IPSET_EXCLUDE6 src -j NFQUEUE --queue-num $3 --queue-bypass"
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if [ -n "$4" ] ; then
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for i in $4; do
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# iptables PREROUTING chain is before NAT. not possible to have DNATed ip's there
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ipt6_add_del $1 INPUT -t mangle -i $i $rule
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ipt6_add_del $1 FORWARD -t mangle -i $i $rule
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done
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else
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ipt6_add_del $1 INPUT -t mangle $rule
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ipt6_add_del $1 FORWARD -t mangle $rule
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fi
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}
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}
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fw_nfqws_pre()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv4
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# $3 - iptable filter for ipv6
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# $4 - queue number
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fw_nfqws_pre4 $1 "$2" $4
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fw_nfqws_pre6 $1 "$3" $4
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}
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zapret_do_firewall_rules_ipt()
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{
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local mode="${MODE_OVERRIDE:-$MODE}"
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local first_packet_only="-m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:4"
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local first_packet_only="-m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:"
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local desync="-m mark ! --mark $DESYNC_MARK/$DESYNC_MARK"
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local f4 f6 qn qns qn6 qns6
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local n f4 f6 ff qn qns qn6 qns6
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# autohostlist mode requires incoming traffic sample
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# always use conntrack packet limiter or nfqws will deal with gigabytes
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if [ "$MODE_FILTER" = "autohostlist" ]; then
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n=$((4+${AUTOHOSTLIST_RETRANS_THRESHOLD:-3}))
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else
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n=4
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fi
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first_packet_only="${first_packet_only}$n"
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case "$mode" in
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tpws)
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@ -279,17 +354,23 @@ zapret_do_firewall_rules_ipt()
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f4="$f4 $first_packet_only"
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filter_apply_ipset_target4 f4
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fw_nfqws_post4 $1 "$f4 $desync" $qn
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[ "$MODE_FILTER" = "autohostlist" ] && fw_nfqws_pre4 $1 "$(reverse_nfqws_rule $f4)" $qn
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else
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if [ -n "$qn" ]; then
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f4="-p tcp --dport 80"
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ff="$f4"
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[ "$MODE_HTTP_KEEPALIVE" = "1" ] || f4="$f4 $first_packet_only"
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ff="$ff $first_packet_only"
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filter_apply_ipset_target4 f4
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filter_apply_ipset_target4 ff
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fw_nfqws_post4 $1 "$f4 $desync" $qn
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[ "$MODE_FILTER" = "autohostlist" ] && fw_nfqws_pre4 $1 "$(reverse_nfqws_rule $ff)" $qn
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fi
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if [ -n "$qns" ]; then
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f4="-p tcp --dport 443 $first_packet_only"
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filter_apply_ipset_target4 f4
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fw_nfqws_post4 $1 "$f4 $desync" $qns
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[ "$MODE_FILTER" = "autohostlist" ] && fw_nfqws_pre4 $1 "$(reverse_nfqws_rule $f4)" $qns
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fi
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fi
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if [ "$MODE_HTTP_KEEPALIVE" != "1" ] && [ -n "$qn6" ] && [ "$qn6" = "$qns6" ]; then
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@ -297,17 +378,23 @@ zapret_do_firewall_rules_ipt()
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f6="$f6 $first_packet_only"
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filter_apply_ipset_target6 f6
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fw_nfqws_post6 $1 "$f6 $desync" $qn6
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[ "$MODE_FILTER" = "autohostlist" ] && fw_nfqws_pre6 $1 "$(reverse_nfqws_rule $f6)" $qn
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else
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if [ -n "$qn6" ]; then
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f6="-p tcp --dport 80"
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ff="$f6"
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[ "$MODE_HTTP_KEEPALIVE" = "1" ] || f6="$f6 $first_packet_only"
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ff="$ff $first_packet_only"
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filter_apply_ipset_target6 f6
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filter_apply_ipset_target6 ff
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fw_nfqws_post6 $1 "$f6 $desync" $qn6
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[ "$MODE_FILTER" = "autohostlist" ] && fw_nfqws_pre6 $1 "$(reverse_nfqws_rule $ff)" $qn6
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fi
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if [ -n "$qns6" ]; then
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f6="-p tcp --dport 443 $first_packet_only"
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filter_apply_ipset_target6 f6
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fw_nfqws_post6 $1 "$f6 $desync" $qns6
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[ "$MODE_FILTER" = "autohostlist" ] && fw_nfqws_pre6 $1 "$(reverse_nfqws_rule $f6)" $qns6
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fi
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fi
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@ -1,3 +1,7 @@
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set_conntrack_liberal_mode()
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{
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[ -n "$SKIP_CONNTRACK_LIBERAL_MODE" ] || sysctl -w net.netfilter.nf_conntrack_tcp_be_liberal=$1
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}
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zapret_do_firewall()
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{
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linux_fwtype
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@ -14,6 +18,13 @@ zapret_do_firewall()
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;;
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esac
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# russian DPI sends RST,ACK with wrong ACK.
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# this is sometimes treated by conntrack as invalid and connbytes fw rules do not pass RST packet to nfqws.
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# swith on liberal mode on zapret firewall start and switch off on zapret firewall stop
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# this is only required for processing incoming bad RSTs. incoming rules are only applied in autohostlist mode
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# calling this after firewall because conntrack module can be not loaded before applying conntrack firewall rules
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[ "$MODE_FILTER" = "autohostlist" -a "$MODE" != tpws-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" ] && $INIT_FW_POST_DOWN_HOOK
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@ -13,13 +13,15 @@ find_hostlists()
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HOSTLIST_EXCLUDE="$HOSTLIST_BASE/zapret-hosts-user-exclude.txt.gz"
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[ -f "$HOSTLIST_EXCLUDE" ] || HOSTLIST_EXCLUDE="$HOSTLIST_BASE/zapret-hosts-user-exclude.txt"
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[ -f "$HOSTLIST_EXCLUDE" ] || HOSTLIST_EXCLUDE=
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HOSTLIST_AUTO="$HOSTLIST_BASE/zapret-hosts-auto.txt"
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}
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filter_apply_hostlist_target()
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{
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# $1 - var name of tpws or nfqws params
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[ "$MODE_FILTER" = "hostlist" ] || return
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[ "$MODE_FILTER" = "hostlist" -o "$MODE_FILTER" = "autohostlist" ] || return
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local HOSTLIST_BASE HOSTLIST HOSTLIST_USER HOSTLIST_EXCLUDE
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@ -28,4 +30,11 @@ filter_apply_hostlist_target()
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[ -n "$HOSTLIST" ] && eval $1="\"\$$1 --hostlist=$HOSTLIST\""
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[ -n "$HOSTLIST_USER" ] && eval $1="\"\$$1 --hostlist=$HOSTLIST_USER\""
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[ -n "$HOSTLIST_EXCLUDE" ] && eval $1="\"\$$1 --hostlist-exclude=$HOSTLIST_EXCLUDE\""
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[ "$MODE_FILTER" = "autohostlist" ] && {
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local parm1="${AUTOHOSTLIST_FAIL_THRESHOLD:+--hostlist-auto-fail-threshold=$AUTOHOSTLIST_FAIL_THRESHOLD}"
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local parm2="${AUTOHOSTLIST_FAIL_TIME:+--hostlist-auto-fail-time=$AUTOHOSTLIST_FAIL_TIME}"
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local parm3
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[ "$MODE" = "tpws" -o "$MODE" = "tpws-socks" ] || parm3="${AUTOHOSTLIST_RETRANS_THRESHOLD:+--hostlist-auto-retrans-threshold=$AUTOHOSTLIST_RETRANS_THRESHOLD}"
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eval $1="\"\$$1 --hostlist-auto=$HOSTLIST_AUTO $parm1 $parm2 $parm3\""
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}
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}
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@ -63,10 +63,8 @@ nft_del_all_chains_from_table()
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nft_create_chains()
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{
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# NOTE : postrouting hook has priority 101 to hook packets already processed by nat
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# NOTE : this is the only way to implement ipfrag for forwarded packets if nat is present
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# NOTE : to avoid retracking and sport changing use notrack for nfqws generated packets
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# NOTE : this also prevents defragmentation of ipv6 fragmented frames in kernels 4.16+
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# NOTE : postrouting hook has priority 99 to hook packets with original source but NATed destination
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# NOTE : prerouting hook has priority -99 for the same reason
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cat << EOF | nft -f -
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add chain inet $ZAPRET_NFT_TABLE dnat_output { type nat hook output priority -101; }
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flush chain inet $ZAPRET_NFT_TABLE dnat_output
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@ -84,6 +82,7 @@ cat << EOF | nft -f -
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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 99; }
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add chain inet $ZAPRET_NFT_TABLE prerouting { type filter hook prerouting priority -99; }
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flush chain inet $ZAPRET_NFT_TABLE postrouting
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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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@ -109,6 +108,7 @@ cat << EOF | nft -f - 2>/dev/null
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delete chain inet $ZAPRET_NFT_TABLE forward
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delete chain inet $ZAPRET_NFT_TABLE input
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delete chain inet $ZAPRET_NFT_TABLE postrouting
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delete chain inet $ZAPRET_NFT_TABLE prerouting
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delete chain inet $ZAPRET_NFT_TABLE flow_offload
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delete chain inet $ZAPRET_NFT_TABLE localnet_protect
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EOF
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@ -202,7 +202,7 @@ nft_reverse_nfqws_rule()
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}
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nft_clean_nfqws_rule()
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{
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echo "$@" | sed -e "s/mark and $DESYNC_MARK == 0//g"
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echo "$@" | sed -e "s/mark and $DESYNC_MARK == 0//g" -e "s/oifname @wanif6//g" -e "s/oifname @wanif//g"
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}
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nft_add_nfqws_flow_exempt_rule()
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{
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@ -464,6 +464,64 @@ nft_fw_nfqws_post()
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nft_fw_nfqws_post6 "$2" $3
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}
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_nft_fw_nfqws_pre4()
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{
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# $1 - filter ipv4
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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" -o -z "$1" ] || {
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local filter="$1" port="$2" rule
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nft_print_op "$filter" "nfqws prerouting (qnum $port)" 4
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rule="${3:+iifname @wanif }$filter ip saddr != @nozapret"
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nft_add_rule prerouting $rule queue num $port bypass
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}
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}
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_nft_fw_nfqws_pre6()
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{
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# $1 - filter ipv6
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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" -o -z "$1" ] || {
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local filter="$1" port="$2" rule
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nft_print_op "$filter" "nfqws prerouting (qnum $port)" 6
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rule="${3:+iifname @wanif6 }$filter ip6 saddr != @nozapret6"
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nft_add_rule prerouting $rule queue num $port bypass
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}
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}
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nft_fw_nfqws_pre()
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{
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# $1 - filter ipv4
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# $2 - filter ipv6
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# $3 - queue number
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nft_fw_nfqws_pre4 "$1" $3
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nft_fw_nfqws_pre6 "$2" $3
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}
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nft_fw_nfqws_both4()
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{
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# $1 - filter ipv4
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# $2 - queue number
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nft_fw_nfqws_post4 "$@"
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nft_fw_nfqws_pre4 "$(nft_reverse_nfqws_rule $1)" $2
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}
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nft_fw_nfqws_both6()
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{
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# $1 - filter ipv6
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# $2 - queue number
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nft_fw_nfqws_post6 "$@"
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nft_fw_nfqws_pre6 "$(nft_reverse_nfqws_rule $1)" $2
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}
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nft_fw_nfqws_both()
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{
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# $1 - filter ipv4
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# $2 - filter ipv6
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# $3 - queue number
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nft_fw_nfqws_both4 "$1" "$3"
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nft_fw_nfqws_both6 "$2" "$3"
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}
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zapret_reload_ifsets()
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{
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@ -485,9 +543,18 @@ zapret_apply_firewall_rules_nft()
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{
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local mode="${MODE_OVERRIDE:-$MODE}"
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local first_packet_only="ct original packets 1-4"
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local first_packet_only
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local desync="mark and $DESYNC_MARK == 0"
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local f4 f6 qn qns qn6 qns6
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local f4 f6 ff qn qns qn6 qns6
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# autohostlist mode requires incoming traffic sample
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# always use conntrack packet limiter or nfqws will deal with gigabytes
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if [ "$MODE_FILTER" = "autohostlist" ]; then
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first_packet_only=$((4+${AUTOHOSTLIST_RETRANS_THRESHOLD:-3}))
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else
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first_packet_only=4
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fi
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first_packet_only="ct original packets 1-$first_packet_only"
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case "$mode" in
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tpws)
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@ -508,17 +575,23 @@ zapret_apply_firewall_rules_nft()
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f4="$f4 $first_packet_only"
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nft_filter_apply_ipset_target4 f4
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nft_fw_nfqws_post4 "$f4 $desync" $qn
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[ "$MODE_FILTER" = "autohostlist" ] && nft_fw_nfqws_pre4 "$(nft_reverse_nfqws_rule $f4)" $qn
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else
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if [ -n "$qn" ]; then
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f4="tcp dport 80"
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ff="$f4"
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[ "$MODE_HTTP_KEEPALIVE" = "1" ] || f4="$f4 $first_packet_only"
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ff="$ff $first_packet_only"
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nft_filter_apply_ipset_target4 f4
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nft_filter_apply_ipset_target4 ff
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nft_fw_nfqws_post4 "$f4 $desync" $qn
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[ "$MODE_FILTER" = "autohostlist" ] && nft_fw_nfqws_pre4 "$(nft_reverse_nfqws_rule $ff)" $qn
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fi
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if [ -n "$qns" ]; then
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f4="tcp dport 443 $first_packet_only"
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nft_filter_apply_ipset_target4 f4
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nft_fw_nfqws_post4 "$f4 $desync" $qns
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[ "$MODE_FILTER" = "autohostlist" ] && nft_fw_nfqws_pre4 "$(nft_reverse_nfqws_rule $f4)" $qns
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fi
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fi
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if [ "$MODE_HTTP_KEEPALIVE" != "1" ] && [ -n "$qn6" ] && [ "$qn6" = "$qns6" ]; then
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@ -526,17 +599,23 @@ zapret_apply_firewall_rules_nft()
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f6="$f6 $first_packet_only"
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nft_filter_apply_ipset_target6 f6
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nft_fw_nfqws_post6 "$f6 $desync" $qn6
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[ "$MODE_FILTER" = "autohostlist" ] && nft_fw_nfqws_pre6 "$(nft_reverse_nfqws_rule $f6)" $qn
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else
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if [ -n "$qn6" ]; then
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f6="tcp dport 80"
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ff="$f6"
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||||
[ "$MODE_HTTP_KEEPALIVE" = "1" ] || f6="$f6 $first_packet_only"
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ff="$ff $first_packet_only"
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nft_filter_apply_ipset_target6 f6
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nft_filter_apply_ipset_target6 ff
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nft_fw_nfqws_post6 "$f6 $desync" $qn6
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[ "$MODE_FILTER" = "autohostlist" ] && nft_fw_nfqws_pre6 "$(nft_reverse_nfqws_rule $ff)" $qn6
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||||
fi
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if [ -n "$qns6" ]; then
|
||||
f6="tcp dport 443 $first_packet_only"
|
||||
nft_filter_apply_ipset_target6 f6
|
||||
nft_fw_nfqws_post6 "$f6 $desync" $qns6
|
||||
[ "$MODE_FILTER" = "autohostlist" ] && nft_fw_nfqws_pre6 "$(nft_reverse_nfqws_rule $f6)" $qns6
|
||||
fi
|
||||
fi
|
||||
|
||||
|
||||
@ -1,3 +1,12 @@
|
||||
apply_unspecified_desync_modes()
|
||||
{
|
||||
NFQWS_OPT_DESYNC_HTTP="${NFQWS_OPT_DESYNC_HTTP:-$NFQWS_OPT_DESYNC}"
|
||||
NFQWS_OPT_DESYNC_HTTPS="${NFQWS_OPT_DESYNC_HTTPS:-$NFQWS_OPT_DESYNC}"
|
||||
NFQWS_OPT_DESYNC_HTTP6="${NFQWS_OPT_DESYNC_HTTP6:-$NFQWS_OPT_DESYNC_HTTP}"
|
||||
NFQWS_OPT_DESYNC_HTTPS6="${NFQWS_OPT_DESYNC_HTTPS6:-$NFQWS_OPT_DESYNC_HTTPS}"
|
||||
NFQWS_OPT_DESYNC_QUIC6="${NFQWS_OPT_DESYNC_QUIC6:-$NFQWS_OPT_DESYNC_QUIC}"
|
||||
}
|
||||
|
||||
get_nfqws_qnums()
|
||||
{
|
||||
# $1 - var name for ipv4 http
|
||||
|
||||
@ -14,6 +14,11 @@ iptables -t mangle -I POSTROUTING -p tcp -m multiport --dports 80,443 -m connbyt
|
||||
iptables -t mangle -I POSTROUTING -p tcp --dport 443 -m mark ! --mark 0x40000000/0x40000000 -j NFQUEUE --queue-num 200 --queue-bypass
|
||||
iptables -t mangle -I POSTROUTING -p udp --dport 443 -m mark ! --mark 0x40000000/0x40000000 -j NFQUEUE --queue-num 200 --queue-bypass
|
||||
|
||||
# auto hostlist with avoiding wrong ACK numbers in RST,ACK packets sent by russian DPI
|
||||
sysctl net.netfilter.nf_conntrack_tcp_be_liberal=1
|
||||
iptables -t mangle -I POSTROUTING -p tcp -m multiport --dports 80,443 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:12 -m mark ! --mark 0x40000000/0x40000000 -j NFQUEUE --queue-num 200 --queue-bypass
|
||||
iptables -t mangle -I PREROUTING -p tcp -m multiport --sports 80,443 -m connbytes --connbytes-dir=reply --connbytes-mode=packets --connbytes 1:4 -m mark ! --mark 0x40000000/0x40000000 -j NFQUEUE --queue-num 200 --queue-bypass
|
||||
|
||||
|
||||
For TPROXY :
|
||||
|
||||
|
||||
@ -19,7 +19,13 @@ For dpi desync attack :
|
||||
nft delete table inet ztest
|
||||
nft create table inet ztest
|
||||
nft add chain inet ztest post "{type filter hook postrouting priority mangle;}"
|
||||
nft add rule inet ztest post tcp dport "{80,443}" queue num 200 bypass
|
||||
nft add rule inet ztest post tcp dport "{80,443}" ct original packets 1-12 queue num 200 bypass
|
||||
nft add rule inet ztest post udp dport 443 ct original packets 1-4 queue num 200 bypass
|
||||
|
||||
# auto hostlist with avoiding wrong ACK numbers in RST,ACK packets sent by russian DPI
|
||||
sysctl net.netfilter.nf_conntrack_tcp_be_liberal=1
|
||||
nft add chain inet ztest pre "{type filter hook prerouting priority filter;}"
|
||||
nft add rule inet ztest pre tcp sport "{80,443}" ct reply packets 1-4 queue num 200 bypass
|
||||
|
||||
|
||||
show rules : nft list table inet ztest
|
||||
|
||||
@ -116,7 +116,7 @@ SOXIFIER_PORT=1099
|
||||
|
||||
create_ipset no-update
|
||||
|
||||
network_find_wan_all wan_iface
|
||||
network_find_wan4_all wan_iface
|
||||
for ext_iface in $wan_iface; do
|
||||
network_get_device ext_device $ext_iface
|
||||
ipt OUTPUT -t nat -o $ext_device -p tcp --dport 443 -m set --match-set zapret dst -m set ! --match-set nozapret dst -j REDIRECT --to-port $SOXIFIER_PORT
|
||||
|
||||
@ -268,7 +268,7 @@ OUTPUT относится к исходящим с роутера пакетам
|
||||
|
||||
create_ipset no-update
|
||||
|
||||
network_find_wan_all wan_iface
|
||||
network_find_wan4_all wan_iface
|
||||
for ext_iface in $wan_iface; do
|
||||
network_get_device DEVICE $ext_iface
|
||||
ipt OUTPUT -t mangle -o $DEVICE -p tcp --dport 443 -m set --match-set zapret dst -m set ! --match-set nozapret dst -j MARK --set-mark 0x800/0x800
|
||||
@ -414,7 +414,7 @@ connmark относится к соединению, fwmark - к пакету.
|
||||
|
||||
create_ipset no-update
|
||||
|
||||
network_find_wan_all wan_iface
|
||||
network_find_wan4_all wan_iface
|
||||
for ext_iface in $wan_iface; do
|
||||
network_get_device DEVICE $ext_iface
|
||||
ipt OUTPUT -t mangle -o $DEVICE -p tcp --dport 443 -m set --match-set zapret dst -m set ! --match-set nozapret dst -j MARK --set-mark 0x800/0x800
|
||||
|
||||
@ -30,12 +30,7 @@ CUSTOM_SCRIPT="$ZAPRET_BASE/init.d/openwrt/custom"
|
||||
IPSET_EXCLUDE="-m set ! --match-set nozapret"
|
||||
IPSET_EXCLUDE6="-m set ! --match-set nozapret6"
|
||||
|
||||
NFQWS_OPT_DESYNC_HTTP="${NFQWS_OPT_DESYNC_HTTP:-$NFQWS_OPT_DESYNC}"
|
||||
NFQWS_OPT_DESYNC_HTTPS="${NFQWS_OPT_DESYNC_HTTPS:-$NFQWS_OPT_DESYNC}"
|
||||
NFQWS_OPT_DESYNC_HTTP6="${NFQWS_OPT_DESYNC_HTTP6:-$NFQWS_OPT_DESYNC_HTTP}"
|
||||
NFQWS_OPT_DESYNC_HTTPS6="${NFQWS_OPT_DESYNC_HTTPS6:-$NFQWS_OPT_DESYNC_HTTPS}"
|
||||
NFQWS_OPT_DESYNC_QUIC6="${NFQWS_OPT_DESYNC_QUIC6:-$NFQWS_OPT_DESYNC_QUIC}"
|
||||
|
||||
apply_unspecified_desync_modes
|
||||
|
||||
|
||||
# can be multiple ipv6 outgoing interfaces
|
||||
@ -60,6 +55,15 @@ network_find_wan6_all()
|
||||
__network_ifstatus "$1" "" "[@.route[@.target='::' && !@.table]].interface" "" 10 2>/dev/null && return
|
||||
network_find_wan6 $1
|
||||
}
|
||||
network_find_wanX_devices()
|
||||
{
|
||||
# $1 - ip version: 4 or 6
|
||||
# $2 - variable to put result to
|
||||
local ifaces
|
||||
network_find_wan${1}_all ifaces
|
||||
call_for_multiple_items network_get_device $2 "$ifaces"
|
||||
}
|
||||
|
||||
|
||||
dnat6_target()
|
||||
{
|
||||
@ -87,25 +91,35 @@ set_route_localnet()
|
||||
}
|
||||
|
||||
|
||||
fw_nfqws_post_x()
|
||||
fw_nfqws_prepost_x()
|
||||
{
|
||||
# $1 - 1 - add, 0 - del
|
||||
# $2 - filter
|
||||
# $3 - queue number
|
||||
# $4 - ip version : 4 or 6
|
||||
# $4 - 4/6
|
||||
# $5 - post/pre
|
||||
|
||||
local ifaces DWAN
|
||||
network_find_wan${4}_all ifaces
|
||||
call_for_multiple_items network_get_device DWAN "$ifaces"
|
||||
|
||||
[ -n "$DWAN" ] && _fw_nfqws_post${4} $1 "$2" $3 "$(unique $DWAN)"
|
||||
[ -n "$DWAN" ] && _fw_nfqws_${5}${4} $1 "$2" $3 "$(unique $DWAN)"
|
||||
}
|
||||
fw_nfqws_post4()
|
||||
{
|
||||
fw_nfqws_post_x $1 "$2" $3 4
|
||||
fw_nfqws_prepost_x $1 "$2" $3 4 post
|
||||
}
|
||||
fw_nfqws_post6()
|
||||
{
|
||||
fw_nfqws_post_x $1 "$2" $3 6
|
||||
fw_nfqws_prepost_x $1 "$2" $3 6 post
|
||||
}
|
||||
fw_nfqws_pre4()
|
||||
{
|
||||
fw_nfqws_prepost_x $1 "$2" $3 4 pre
|
||||
}
|
||||
fw_nfqws_pre6()
|
||||
{
|
||||
fw_nfqws_prepost_x $1 "$2" $3 6 pre
|
||||
}
|
||||
fw_tpws_x()
|
||||
{
|
||||
@ -146,10 +160,6 @@ list_nfqws_rules()
|
||||
grep -E "NFQUEUE --queue-num $QNUM --queue-bypass|NFQUEUE --queue-num $(($QNUM+1)) --queue-bypass|NFQUEUE --queue-num $(($QNUM+2)) --queue-bypass|NFQUEUE --queue-num $(($QNUM+3)) --queue-bypass|NFQUEUE --queue-num $(($QNUM+10)) --queue-bypass|NFQUEUE --queue-num $(($QNUM+11)) --queue-bypass" | \
|
||||
sed -re 's/^-A POSTROUTING (.*) -j NFQUEUE.*$/\1/' -e "s/-m mark ! --mark $DESYNC_MARK\/$DESYNC_MARK//"
|
||||
}
|
||||
reverse_nfqws_rule()
|
||||
{
|
||||
sed -e 's/-o /-i /g' -e 's/--dport /--sport /g' -e 's/--dports /--sports /g' -e 's/ dst$/ src/' -e 's/ dst / src /g'
|
||||
}
|
||||
apply_flow_offloading_enable_rule()
|
||||
{
|
||||
# $1 = '' for ipv4, '6' for ipv6
|
||||
@ -171,14 +181,16 @@ apply_flow_offloading_exempt_rule()
|
||||
}
|
||||
flow_offloading_unexempt_v()
|
||||
{
|
||||
ipt$1_del FORWARD -j forwarding_rule_zapret
|
||||
# $1 = '' for ipv4, '6' for ipv6
|
||||
local DWAN
|
||||
network_find_wanX_devices ${1:-4} DWAN
|
||||
for i in $DWAN; do ipt$1_del FORWARD -o $i -j forwarding_rule_zapret ; done
|
||||
ip$1tables -F forwarding_rule_zapret 2>/dev/null
|
||||
ip$1tables -X forwarding_rule_zapret 2>/dev/null
|
||||
}
|
||||
flow_offloading_exempt_v()
|
||||
{
|
||||
# $1 = '' for ipv4, '6' for ipv6
|
||||
|
||||
is_ipt_flow_offload_avail $1 || return 0
|
||||
|
||||
flow_offloading_unexempt_v $1
|
||||
@ -186,21 +198,19 @@ flow_offloading_exempt_v()
|
||||
[ "$FLOWOFFLOAD" = 'software' -o "$FLOWOFFLOAD" = 'hardware' ] && {
|
||||
ip$1tables -N forwarding_rule_zapret
|
||||
|
||||
list_nfqws_rules $1 |
|
||||
while read rule; do
|
||||
apply_flow_offloading_exempt_rule "$1" $rule
|
||||
done
|
||||
|
||||
list_nfqws_rules $1 | grep -v "connbytes" | reverse_nfqws_rule |
|
||||
# remove outgoing interface
|
||||
list_nfqws_rules $1 | sed -re 's/-o +[^ ]+//g' |
|
||||
while read rule; do
|
||||
apply_flow_offloading_exempt_rule "$1" $rule
|
||||
done
|
||||
|
||||
apply_flow_offloading_enable_rule $1
|
||||
|
||||
ipt$1 FORWARD -j forwarding_rule_zapret
|
||||
# only outgoing to WAN packets trigger flow offloading
|
||||
local DWAN
|
||||
network_find_wanX_devices ${1:-4} DWAN
|
||||
for i in $DWAN; do ipt$1 FORWARD -o $i -j forwarding_rule_zapret; done
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
flow_offloading_exempt()
|
||||
@ -252,3 +262,11 @@ nft_fw_nfqws_post6()
|
||||
{
|
||||
_nft_fw_nfqws_post6 "$1" $2 always_apply_wan_filter
|
||||
}
|
||||
nft_fw_nfqws_pre4()
|
||||
{
|
||||
_nft_fw_nfqws_pre4 "$1" $2 always_apply_wan_filter
|
||||
}
|
||||
nft_fw_nfqws_pre6()
|
||||
{
|
||||
_nft_fw_nfqws_pre6 "$1" $2 always_apply_wan_filter
|
||||
}
|
||||
|
||||
@ -67,10 +67,7 @@ IPSET_CR="$ZAPRET_BASE/ipset/create_ipset.sh"
|
||||
[ -n "$QNUM" ] || QNUM=200
|
||||
[ -n "$NFQWS" ] || NFQWS="$ZAPRET_BASE/nfq/nfqws"
|
||||
NFQWS_OPT_BASE="$USEROPT --dpi-desync-fwmark=$DESYNC_MARK"
|
||||
NFQWS_OPT_DESYNC_HTTP="${NFQWS_OPT_DESYNC_HTTP:-$NFQWS_OPT_DESYNC}"
|
||||
NFQWS_OPT_DESYNC_HTTPS="${NFQWS_OPT_DESYNC_HTTPS:-$NFQWS_OPT_DESYNC}"
|
||||
NFQWS_OPT_DESYNC_HTTP6="${NFQWS_OPT_DESYNC_HTTP6:-$NFQWS_OPT_DESYNC_HTTP}"
|
||||
NFQWS_OPT_DESYNC_HTTPS6="${NFQWS_OPT_DESYNC_HTTPS6:-$NFQWS_OPT_DESYNC_HTTPS}"
|
||||
apply_unspecified_desync_modes
|
||||
|
||||
[ -n "$TPPORT" ] || TPPORT=988
|
||||
[ -n "$TPWS" ] || TPWS="$ZAPRET_BASE/tpws/tpws"
|
||||
@ -113,6 +110,14 @@ fw_nfqws_post6()
|
||||
{
|
||||
_fw_nfqws_post6 $1 "$2" $3 "${IFACE_WAN6:-$IFACE_WAN}"
|
||||
}
|
||||
fw_nfqws_pre4()
|
||||
{
|
||||
_fw_nfqws_pre4 $1 "$2" $3 "$IFACE_WAN"
|
||||
}
|
||||
fw_nfqws_pre6()
|
||||
{
|
||||
_fw_nfqws_pre6 $1 "$2" $3 "${IFACE_WAN6:-$IFACE_WAN}"
|
||||
}
|
||||
fw_tpws4()
|
||||
{
|
||||
_fw_tpws4 $1 "$2" $3 "$IFACE_LAN" "$IFACE_WAN"
|
||||
@ -137,6 +142,14 @@ nft_fw_nfqws_post6()
|
||||
{
|
||||
_nft_fw_nfqws_post6 "$1" $2 "${IFACE_WAN6:-$IFACE_WAN}"
|
||||
}
|
||||
nft_fw_nfqws_pre4()
|
||||
{
|
||||
_nft_fw_nfqws_pre4 "$1" $2 "$IFACE_WAN"
|
||||
}
|
||||
nft_fw_nfqws_pre6()
|
||||
{
|
||||
_nft_fw_nfqws_pre6 "$1" $2 "${IFACE_WAN6:-$IFACE_WAN}"
|
||||
}
|
||||
nft_fill_ifsets_overload()
|
||||
{
|
||||
nft_fill_ifsets "$IFACE_LAN" "$IFACE_WAN" "${IFACE_WAN6:-$IFACE_WAN}"
|
||||
|
||||
@ -225,8 +225,8 @@ select_mode_quic()
|
||||
}
|
||||
select_mode_filter()
|
||||
{
|
||||
local filter="none ipset hostlist"
|
||||
[ "$MODE" = "tpws-socks" ] && filter="none hostlist"
|
||||
local filter="none ipset hostlist autohostlist"
|
||||
[ "$MODE" = "tpws-socks" ] && filter="none hostlist autohostlist"
|
||||
echo
|
||||
echo select filtering :
|
||||
ask_list MODE_FILTER "$filter" none && write_config_var MODE_FILTER
|
||||
@ -487,7 +487,7 @@ backup_restore_settings()
|
||||
{
|
||||
# $1 - 1 - backup, 0 - restore
|
||||
local mode=$1
|
||||
on_off_function _backup_settings _restore_settings $mode "config" "init.d/sysv/custom" "init.d/openwrt/custom" "init.d/macos/custom" "ipset/zapret-hosts-user.txt" "ipset/zapret-hosts-user-exclude.txt" "ipset/zapret-hosts-user-ipban.txt"
|
||||
on_off_function _backup_settings _restore_settings $mode "config" "init.d/sysv/custom" "init.d/openwrt/custom" "init.d/macos/custom" "ipset/zapret-hosts-user.txt" "ipset/zapret-hosts-user-exclude.txt" "ipset/zapret-hosts-user-ipban.txt" "ipset/zapret-hosts-auto.txt"
|
||||
}
|
||||
|
||||
check_location()
|
||||
|
||||
@ -25,11 +25,16 @@ static void connswap(const t_conn *c, t_conn *c2)
|
||||
c2->dport = c->sport;
|
||||
}
|
||||
|
||||
static void ConntrackFreeElem(t_conntrack_pool *elem)
|
||||
{
|
||||
if (elem->track.hostname) free(elem->track.hostname);
|
||||
free(elem);
|
||||
}
|
||||
|
||||
static void ConntrackPoolDestroyPool(t_conntrack_pool **pp)
|
||||
{
|
||||
t_conntrack_pool *elem, *tmp;
|
||||
HASH_ITER(hh, *pp, elem, tmp) { HASH_DEL(*pp, elem); free(elem); }
|
||||
HASH_ITER(hh, *pp, elem, tmp) { HASH_DEL(*pp, elem); ConntrackFreeElem(elem); }
|
||||
}
|
||||
void ConntrackPoolDestroy(t_conntrack *p)
|
||||
{
|
||||
@ -226,7 +231,7 @@ static bool ConntrackPoolDropPool(t_conntrack_pool **pp, const struct ip *ip, co
|
||||
t=ConntrackPoolSearch(*pp,&connswp);
|
||||
}
|
||||
if (!t) return false;
|
||||
HASH_DEL(*pp, t); free(t);
|
||||
HASH_DEL(*pp, t); ConntrackFreeElem(t);
|
||||
return true;
|
||||
}
|
||||
bool ConntrackPoolDrop(t_conntrack *p, const struct ip *ip, const struct ip6_hdr *ip6, const struct tcphdr *tcphdr, const struct udphdr *udphdr)
|
||||
@ -251,7 +256,7 @@ void ConntrackPoolPurge(t_conntrack *p)
|
||||
t->conn.l4proto==IPPROTO_UDP &&
|
||||
tidle>=p->timeout_udp)
|
||||
{
|
||||
HASH_DEL(p->pool, t); free(t);
|
||||
HASH_DEL(p->pool, t); ConntrackFreeElem(t);
|
||||
}
|
||||
}
|
||||
p->t_last_purge = tnow;
|
||||
@ -263,6 +268,18 @@ static void taddr2str(uint8_t l3proto, const t_addr *a, char *buf, size_t bufsiz
|
||||
if (!inet_ntop(family_from_proto(l3proto), a, buf, bufsize) && bufsize) *buf=0;
|
||||
}
|
||||
|
||||
static const char *ConntrackProtoName(t_l7proto proto)
|
||||
{
|
||||
switch(proto)
|
||||
{
|
||||
case HTTP: return "HTTP";
|
||||
case TLS: return "TLS";
|
||||
case QUIC: return "QUIC";
|
||||
case WIREGUARD: return "WIREGUARD";
|
||||
case DHT: return "DHT";
|
||||
default: return "UNKNOWN";
|
||||
}
|
||||
}
|
||||
void ConntrackPoolDump(const t_conntrack *p)
|
||||
{
|
||||
t_conntrack_pool *t, *tmp;
|
||||
@ -271,29 +288,24 @@ void ConntrackPoolDump(const t_conntrack *p)
|
||||
HASH_ITER(hh, p->pool, t, tmp) {
|
||||
taddr2str(t->conn.l3proto, &t->conn.src, sa1, sizeof(sa1));
|
||||
taddr2str(t->conn.l3proto, &t->conn.dst, sa2, sizeof(sa2));
|
||||
printf("%s [%s]:%u => [%s]:%u : %s : t0=%llu last=t0+%llu now=last+%llu packets_orig=d%llu/n%llu packets_reply=d%llu/n%llu ",
|
||||
proto_name(t->conn.l4proto),
|
||||
sa1, t->conn.sport, sa2, t->conn.dport,
|
||||
t->conn.l4proto==IPPROTO_TCP ? connstate_s[t->track.state] : "-",
|
||||
(unsigned long long)t->track.t_start, (unsigned long long)(t->track.t_last - t->track.t_start), (unsigned long long)(tnow - t->track.t_last),
|
||||
(unsigned long long)t->track.pdcounter_orig, (unsigned long long)t->track.pcounter_orig,
|
||||
(unsigned long long)t->track.pdcounter_reply, (unsigned long long)t->track.pcounter_reply);
|
||||
if (t->conn.l4proto==IPPROTO_TCP)
|
||||
printf("%s [%s]:%u => [%s]:%u : %s : t0=%llu last=t0+%llu now=last+%llu packets_orig=d%llu/n%llu packets_reply=d%llu/n%llu seq0=%u rseq=%u pos_orig=%u ack0=%u rack=%u pos_reply=%u wsize_orig=%u:%d wsize_reply=%u:%d",
|
||||
proto_name(t->conn.l4proto),
|
||||
sa1, t->conn.sport, sa2, t->conn.dport,
|
||||
t->conn.l4proto==IPPROTO_TCP ? connstate_s[t->track.state] : "-",
|
||||
(unsigned long long)t->track.t_start, (unsigned long long)(t->track.t_last - t->track.t_start), (unsigned long long)(tnow - t->track.t_last),
|
||||
(unsigned long long)t->track.pdcounter_orig, (unsigned long long)t->track.pcounter_orig,
|
||||
(unsigned long long)t->track.pdcounter_reply, (unsigned long long)t->track.pcounter_reply,
|
||||
printf("seq0=%u rseq=%u pos_orig=%u ack0=%u rack=%u pos_reply=%u wsize_orig=%u:%d wsize_reply=%u:%d",
|
||||
t->track.seq0, t->track.seq_last - t->track.seq0, t->track.pos_orig - t->track.seq0,
|
||||
t->track.ack0, t->track.ack_last - t->track.ack0, t->track.pos_reply - t->track.ack0,
|
||||
t->track.winsize_orig, t->track.scale_orig==SCALE_NONE ? -1 : t->track.scale_orig,
|
||||
t->track.winsize_reply, t->track.scale_reply==SCALE_NONE ? -1 : t->track.scale_reply);
|
||||
else
|
||||
printf("%s [%s]:%u => [%s]:%u : %s : t0=%llu last=t0+%llu now=last+%llu packets_orig=d%llu/n%llu packets_reply=d%llu/n%llu rseq=%u pos_orig=%u rack=%u pos_reply=%u",
|
||||
proto_name(t->conn.l4proto),
|
||||
sa1, t->conn.sport, sa2, t->conn.dport,
|
||||
t->conn.l4proto==IPPROTO_TCP ? connstate_s[t->track.state] : "-",
|
||||
(unsigned long long)t->track.t_start, (unsigned long long)(t->track.t_last - t->track.t_start), (unsigned long long)(tnow - t->track.t_last),
|
||||
(unsigned long long)t->track.pdcounter_orig, (unsigned long long)t->track.pcounter_orig,
|
||||
(unsigned long long)t->track.pdcounter_reply, (unsigned long long)t->track.pcounter_reply,
|
||||
printf("rseq=%u pos_orig=%u rack=%u pos_reply=%u",
|
||||
t->track.seq_last, t->track.pos_orig,
|
||||
t->track.ack_last, t->track.pos_reply);
|
||||
printf(" cutoff=%u wss_cutoff=%u d_cutoff=%u\n",
|
||||
t->track.b_cutoff, t->track.b_wssize_cutoff, t->track.b_desync_cutoff);
|
||||
printf(" req_retrans=%u cutoff=%u wss_cutoff=%u d_cutoff=%u hostname=%s l7proto=%s\n",
|
||||
t->track.req_retrans_counter, t->track.b_cutoff, t->track.b_wssize_cutoff, t->track.b_desync_cutoff, t->track.hostname, ConntrackProtoName(t->track.l7proto));
|
||||
};
|
||||
}
|
||||
|
||||
@ -20,6 +20,7 @@
|
||||
#define HASH_FUNCTION HASH_BER
|
||||
#include "uthash.h"
|
||||
|
||||
#define RETRANS_COUNTER_STOP ((uint8_t)-1)
|
||||
|
||||
typedef union {
|
||||
struct in_addr ip;
|
||||
@ -37,6 +38,7 @@ typedef struct
|
||||
// ESTABLISHED - any except SYN or SYN/ACK received
|
||||
// FIN - FIN or RST received
|
||||
typedef enum {SYN=0, ESTABLISHED, FIN} t_connstate;
|
||||
typedef enum {UNKNOWN=0, HTTP, TLS, QUIC, WIREGUARD, DHT} t_l7proto;
|
||||
typedef struct
|
||||
{
|
||||
// common state
|
||||
@ -51,9 +53,15 @@ typedef struct
|
||||
uint32_t seq0, ack0; // starting seq and ack
|
||||
uint16_t winsize_orig, winsize_reply; // last seen window size
|
||||
uint8_t scale_orig, scale_reply; // last seen window scale factor. SCALE_NONE if none
|
||||
|
||||
uint8_t req_retrans_counter; // number of request retransmissions
|
||||
uint32_t req_seq; // sequence number of the request (to track retransmissions)
|
||||
|
||||
bool b_cutoff; // mark for deletion
|
||||
bool b_wssize_cutoff, b_desync_cutoff;
|
||||
|
||||
t_l7proto l7proto;
|
||||
char *hostname;
|
||||
} t_ctrack;
|
||||
|
||||
typedef struct
|
||||
|
||||
179
nfq/desync.c
179
nfq/desync.c
@ -11,9 +11,9 @@
|
||||
|
||||
|
||||
const char *fake_http_request_default = "GET / HTTP/1.1\r\nHost: www.w3.org\r\n"
|
||||
"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0\r\n"
|
||||
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
|
||||
"Accept-Encoding: gzip, deflate\r\n\r\n";
|
||||
"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0\r\n"
|
||||
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8\r\n"
|
||||
"Accept-Encoding: gzip, deflate, br\r\n\r\n";
|
||||
const uint8_t fake_tls_clienthello_default[517] = {
|
||||
0x16, 0x03, 0x01, 0x02, 0x00, 0x01, 0x00, 0x01, 0xfc, 0x03, 0x03, 0x9a, 0x8f, 0xa7, 0x6a, 0x5d,
|
||||
0x57, 0xf3, 0x62, 0x19, 0xbe, 0x46, 0x82, 0x45, 0xe2, 0x59, 0x5c, 0xb4, 0x48, 0x31, 0x12, 0x15,
|
||||
@ -158,7 +158,10 @@ static void maybe_cutoff(t_ctrack *ctrack, uint8_t proto)
|
||||
if (proto==IPPROTO_TCP)
|
||||
// we do not need conntrack entry anymore if all cutoff conditions are either not defined or reached
|
||||
// do not drop udp entry because it will be recreated when next packet arrives
|
||||
ctrack->b_cutoff |= (!params.wssize || ctrack->b_wssize_cutoff) && (!params.desync_cutoff || ctrack->b_desync_cutoff);
|
||||
ctrack->b_cutoff |= \
|
||||
(!params.wssize || ctrack->b_wssize_cutoff) &&
|
||||
(!params.desync_cutoff || ctrack->b_desync_cutoff) &&
|
||||
(!*params.hostlist_auto_filename || ctrack->req_retrans_counter==RETRANS_COUNTER_STOP);
|
||||
}
|
||||
}
|
||||
static void wssize_cutoff(t_ctrack *ctrack)
|
||||
@ -169,7 +172,73 @@ static void wssize_cutoff(t_ctrack *ctrack)
|
||||
maybe_cutoff(ctrack, IPPROTO_TCP);
|
||||
}
|
||||
}
|
||||
#define CONNTRACK_REQUIRED (params.wssize || params.desync_cutoff)
|
||||
|
||||
static void ctrack_stop_req_counter(t_ctrack *ctrack)
|
||||
{
|
||||
ctrack->req_retrans_counter = RETRANS_COUNTER_STOP;
|
||||
maybe_cutoff(ctrack, IPPROTO_TCP);
|
||||
}
|
||||
|
||||
// return true if retrans trigger fires
|
||||
static bool auto_hostlist_retrans(t_ctrack *ctrack, uint8_t l4proto, int threshold)
|
||||
{
|
||||
if (*params.hostlist_auto_filename && ctrack && ctrack->req_retrans_counter!=RETRANS_COUNTER_STOP)
|
||||
{
|
||||
ctrack->req_retrans_counter++;
|
||||
DLOG("req retrans counter : %u/%u\n",ctrack->req_retrans_counter, threshold);
|
||||
if (ctrack->req_retrans_counter >= threshold)
|
||||
{
|
||||
DLOG("req retrans threshold reached\n");
|
||||
ctrack_stop_req_counter(ctrack);
|
||||
return true;
|
||||
}
|
||||
if (l4proto==IPPROTO_TCP)
|
||||
{
|
||||
if (!ctrack->req_seq) ctrack->req_seq = ctrack->seq_last;
|
||||
if (ctrack->seq_last != ctrack->req_seq)
|
||||
{
|
||||
DLOG("another request, not retransmission. stop tracking.\n");
|
||||
ctrack_stop_req_counter(ctrack);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
static void auto_hostlist_failed(const char *hostname)
|
||||
{
|
||||
hostfail_pool *fail_counter;
|
||||
|
||||
fail_counter = HostFailPoolFind(params.hostlist_auto_fail_counters, hostname);
|
||||
if (!fail_counter)
|
||||
{
|
||||
fail_counter = HostFailPoolAdd(¶ms.hostlist_auto_fail_counters, hostname, params.hostlist_auto_fail_time);
|
||||
if (!fail_counter)
|
||||
{
|
||||
fprintf(stderr, "HostFailPoolAdd: out of memory\n");
|
||||
return;
|
||||
}
|
||||
}
|
||||
fail_counter->counter++;
|
||||
DLOG("auto hostlist : %s : fail counter %d/%d\n", hostname, fail_counter->counter, params.hostlist_auto_fail_threshold);
|
||||
if (fail_counter->counter >= params.hostlist_auto_fail_threshold)
|
||||
{
|
||||
DLOG("auto hostlist : fail threshold reached. adding %s to auto hostlist\n", hostname);
|
||||
HostFailPoolDel(¶ms.hostlist_auto_fail_counters, fail_counter);
|
||||
if (!StrPoolAddStr(¶ms.hostlist, hostname))
|
||||
{
|
||||
fprintf(stderr, "StrPoolAddStr out of memory\n");
|
||||
return;
|
||||
}
|
||||
if (!append_to_list_file(params.hostlist_auto_filename, hostname))
|
||||
{
|
||||
perror("write to auto hostlist:");
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#define CONNTRACK_REQUIRED (params.wssize || params.desync_cutoff || *params.hostlist_auto_filename)
|
||||
// result : true - drop original packet, false = dont drop
|
||||
packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout, uint8_t *data_pkt, size_t len_pkt, struct ip *ip, struct ip6_hdr *ip6hdr, struct tcphdr *tcphdr, size_t len_tcp, uint8_t *data_payload, size_t len_payload)
|
||||
{
|
||||
@ -190,6 +259,7 @@ packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout,
|
||||
ConntrackPoolPurge(¶ms.conntrack);
|
||||
if (ConntrackPoolFeed(¶ms.conntrack, ip, ip6hdr, tcphdr, NULL, len_payload, &ctrack, &bReverse))
|
||||
maybe_cutoff(ctrack, IPPROTO_TCP);
|
||||
HostFailPoolPurgeRateLimited(¶ms.hostlist_auto_fail_counters);
|
||||
}
|
||||
|
||||
//ConntrackPoolDump(¶ms.conntrack);
|
||||
@ -199,11 +269,48 @@ packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout,
|
||||
tcp_rewrite_winsize(tcphdr, params.wsize, params.wscale);
|
||||
res=modify;
|
||||
}
|
||||
|
||||
if (bReverse) return res; // nothing to do. do not waste cpu
|
||||
|
||||
if (bReverse)
|
||||
{
|
||||
// process reply packets for auto hostlist mode
|
||||
// by looking at RSTs or HTTP replies we decide whether original request looks to be blocked by DPI
|
||||
if (*params.hostlist_auto_filename && ctrack && ctrack->hostname && ctrack->req_retrans_counter != RETRANS_COUNTER_STOP)
|
||||
{
|
||||
bool bFail=false, bStop=false;
|
||||
if (tcphdr->th_flags & TH_RST)
|
||||
{
|
||||
DLOG("incoming RST detected for hostname %s\n", ctrack->hostname);
|
||||
bFail = bStop = true;
|
||||
}
|
||||
else if (len_payload && ctrack->l7proto==HTTP)
|
||||
{
|
||||
if (IsHttpReply(data_payload,len_payload))
|
||||
{
|
||||
DLOG("incoming HTTP reply detected for hostname %s\n", ctrack->hostname);
|
||||
bFail = HttpReplyLooksLikeDPIRedirect(data_payload, len_payload, ctrack->hostname);
|
||||
if (bFail)
|
||||
DLOG("redirect to another domain detected. possibly DPI redirect.\n")
|
||||
else
|
||||
DLOG("local or in-domain redirect detected. it's not a DPI redirect.\n")
|
||||
}
|
||||
else
|
||||
{
|
||||
// received not http reply. do not monitor this connection anymore
|
||||
DLOG("incoming unknown HTTP data detected for hostname %s\n", ctrack->hostname);
|
||||
}
|
||||
bStop = true;
|
||||
}
|
||||
if (bFail)
|
||||
auto_hostlist_failed(ctrack->hostname);
|
||||
if (bStop)
|
||||
ctrack_stop_req_counter(ctrack);
|
||||
}
|
||||
|
||||
return res; // nothing to do. do not waste cpu
|
||||
}
|
||||
|
||||
uint32_t desync_fwmark = fwmark | params.desync_fwmark;
|
||||
|
||||
|
||||
if (params.wssize)
|
||||
{
|
||||
if (ctrack)
|
||||
@ -269,7 +376,7 @@ packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout,
|
||||
}
|
||||
}
|
||||
|
||||
if (!params.wssize && params.desync_mode==DESYNC_NONE && !params.hostcase && !params.hostnospace && !params.domcase) return res; // nothing to do. do not waste cpu
|
||||
if (!params.wssize && params.desync_mode==DESYNC_NONE && !params.hostcase && !params.hostnospace && !params.domcase && !*params.hostlist_auto_filename) return res; // nothing to do. do not waste cpu
|
||||
|
||||
if (!(tcphdr->th_flags & TH_SYN) && len_payload)
|
||||
{
|
||||
@ -280,12 +387,15 @@ packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout,
|
||||
bool bIsHttp;
|
||||
bool bKnownProtocol = false;
|
||||
uint8_t *p, *phost;
|
||||
|
||||
if ((bIsHttp = IsHttp(data_payload,len_payload)))
|
||||
{
|
||||
DLOG("packet contains HTTP request\n")
|
||||
if (params.wssize) DLOG("forced wssize-cutoff\n");
|
||||
wssize_cutoff(ctrack);
|
||||
if (ctrack && !ctrack->l7proto) ctrack->l7proto = HTTP;
|
||||
if (params.wssize)
|
||||
{
|
||||
DLOG("forced wssize-cutoff\n");
|
||||
wssize_cutoff(ctrack);
|
||||
}
|
||||
fake = params.fake_http;
|
||||
fake_size = params.fake_http_size;
|
||||
if (params.hostlist || params.debug) bHaveHost=HttpExtractHost(data_payload,len_payload,host,sizeof(host));
|
||||
@ -299,8 +409,12 @@ packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout,
|
||||
else if (IsTLSClientHello(data_payload,len_payload))
|
||||
{
|
||||
DLOG("packet contains TLS ClientHello\n")
|
||||
if (params.wssize) DLOG("forced wssize-cutoff\n");
|
||||
wssize_cutoff(ctrack);
|
||||
if (ctrack && !ctrack->l7proto) ctrack->l7proto = TLS;
|
||||
if (params.wssize)
|
||||
{
|
||||
DLOG("forced wssize-cutoff\n");
|
||||
wssize_cutoff(ctrack);
|
||||
}
|
||||
fake = params.fake_tls;
|
||||
fake_size = params.fake_tls_size;
|
||||
if (params.hostlist || params.desync_skip_nosni || params.debug)
|
||||
@ -316,6 +430,10 @@ packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout,
|
||||
}
|
||||
else
|
||||
{
|
||||
if (ctrack && *params.hostlist_auto_filename)
|
||||
// received unknown payload. it means we are out of the request retransmission phase. stop counter
|
||||
ctrack_stop_req_counter(ctrack);
|
||||
|
||||
if (!params.desync_any_proto) return res;
|
||||
DLOG("applying tampering to unknown protocol\n")
|
||||
fake = params.fake_unknown;
|
||||
@ -325,9 +443,17 @@ packet_process_result dpi_desync_tcp_packet(uint32_t fwmark, const char *ifout,
|
||||
if (bHaveHost)
|
||||
{
|
||||
DLOG("hostname: %s\n",host)
|
||||
if ((params.hostlist || params.hostlist_exclude) && !HostlistCheck(params.hostlist, params.hostlist_exclude, host))
|
||||
bool bExcluded;
|
||||
if ((params.hostlist || params.hostlist_exclude) && !HostlistCheck(params.hostlist, params.hostlist_exclude, host, &bExcluded))
|
||||
{
|
||||
DLOG("not applying tampering to this request\n")
|
||||
if (!bExcluded)
|
||||
{
|
||||
if (*params.hostlist_auto_filename && ctrack && !ctrack->hostname)
|
||||
ctrack->hostname=strdup(host);
|
||||
if (auto_hostlist_retrans(ctrack, IPPROTO_TCP, params.hostlist_auto_retrans_threshold))
|
||||
auto_hostlist_failed(host);
|
||||
}
|
||||
return res;
|
||||
}
|
||||
}
|
||||
@ -650,12 +776,13 @@ packet_process_result dpi_desync_udp_packet(uint32_t fwmark, const char *ifout,
|
||||
ConntrackPoolPurge(¶ms.conntrack);
|
||||
if (ConntrackPoolFeed(¶ms.conntrack, ip, ip6hdr, NULL, udphdr, len_payload, &ctrack, &bReverse))
|
||||
maybe_cutoff(ctrack, IPPROTO_UDP);
|
||||
HostFailPoolPurgeRateLimited(¶ms.hostlist_auto_fail_counters);
|
||||
}
|
||||
|
||||
//ConntrackPoolDump(¶ms.conntrack);
|
||||
|
||||
if (bReverse) return res; // nothing to do. do not waste cpu
|
||||
|
||||
|
||||
if (params.desync_cutoff)
|
||||
{
|
||||
if (ctrack)
|
||||
@ -674,7 +801,7 @@ packet_process_result dpi_desync_udp_packet(uint32_t fwmark, const char *ifout,
|
||||
}
|
||||
}
|
||||
|
||||
if (params.desync_mode==DESYNC_NONE) return res;
|
||||
if (params.desync_mode==DESYNC_NONE && !*params.hostlist_auto_filename) return res; // do not waste cpu
|
||||
|
||||
if (len_payload)
|
||||
{
|
||||
@ -688,6 +815,8 @@ packet_process_result dpi_desync_udp_packet(uint32_t fwmark, const char *ifout,
|
||||
if (IsQUICInitial(data_payload,len_payload))
|
||||
{
|
||||
DLOG("packet contains QUIC initial\n")
|
||||
|
||||
if (ctrack && !ctrack->l7proto) ctrack->l7proto = QUIC;
|
||||
fake = params.fake_quic;
|
||||
fake_size = params.fake_quic_size;
|
||||
|
||||
@ -732,6 +861,7 @@ packet_process_result dpi_desync_udp_packet(uint32_t fwmark, const char *ifout,
|
||||
else if (IsWireguardHandshakeInitiation(data_payload,len_payload))
|
||||
{
|
||||
DLOG("packet contains wireguard handshake initiation\n")
|
||||
if (ctrack && !ctrack->l7proto) ctrack->l7proto = WIREGUARD;
|
||||
fake = params.fake_wg;
|
||||
fake_size = params.fake_wg_size;
|
||||
bKnownProtocol = true;
|
||||
@ -739,12 +869,17 @@ packet_process_result dpi_desync_udp_packet(uint32_t fwmark, const char *ifout,
|
||||
else if (IsDhtD1(data_payload,len_payload))
|
||||
{
|
||||
DLOG("packet contains DHT d1...e\n")
|
||||
if (ctrack && !ctrack->l7proto) ctrack->l7proto = DHT;
|
||||
fake = params.fake_dht;
|
||||
fake_size = params.fake_dht_size;
|
||||
bKnownProtocol = true;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (ctrack && *params.hostlist_auto_filename)
|
||||
// received unknown payload. it means we are out of the request retransmission phase. stop counter
|
||||
ctrack_stop_req_counter(ctrack);
|
||||
|
||||
if (!params.desync_any_proto) return res;
|
||||
DLOG("applying tampering to unknown protocol\n")
|
||||
fake = params.fake_unknown_udp;
|
||||
@ -754,9 +889,17 @@ packet_process_result dpi_desync_udp_packet(uint32_t fwmark, const char *ifout,
|
||||
if (bHaveHost)
|
||||
{
|
||||
DLOG("hostname: %s\n",host)
|
||||
if ((params.hostlist || params.hostlist_exclude) && !HostlistCheck(params.hostlist, params.hostlist_exclude, host))
|
||||
bool bExcluded;
|
||||
if ((params.hostlist || params.hostlist_exclude) && !HostlistCheck(params.hostlist, params.hostlist_exclude, host, &bExcluded))
|
||||
{
|
||||
DLOG("not applying tampering to this request\n")
|
||||
if (!bExcluded)
|
||||
{
|
||||
if (*params.hostlist_auto_filename && ctrack && !ctrack->hostname)
|
||||
ctrack->hostname=strdup(host);
|
||||
if (auto_hostlist_retrans(ctrack, IPPROTO_UDP, params.hostlist_auto_retrans_threshold))
|
||||
auto_hostlist_failed(host);
|
||||
}
|
||||
return res;
|
||||
}
|
||||
}
|
||||
|
||||
@ -82,6 +82,14 @@ bool save_file(const char *filename, const void *buffer, size_t buffer_size)
|
||||
fclose(F);
|
||||
return true;
|
||||
}
|
||||
bool append_to_list_file(const char *filename, const char *s)
|
||||
{
|
||||
FILE *F = fopen(filename,"at");
|
||||
if (!F) return false;
|
||||
bool bOK = fprintf(F,"%s\n",s)>0;
|
||||
fclose(F);
|
||||
return bOK;
|
||||
}
|
||||
|
||||
|
||||
void ntop46(const struct sockaddr *sa, char *str, size_t len)
|
||||
|
||||
@ -13,6 +13,7 @@ char *strncasestr(const char *s,const char *find, size_t slen);
|
||||
bool load_file(const char *filename,void *buffer,size_t *buffer_size);
|
||||
bool load_file_nonempty(const char *filename,void *buffer,size_t *buffer_size);
|
||||
bool save_file(const char *filename, const void *buffer, size_t buffer_size);
|
||||
bool append_to_list_file(const char *filename, const char *s);
|
||||
|
||||
void print_sockaddr(const struct sockaddr *sa);
|
||||
void ntop46(const struct sockaddr *sa, char *str, size_t len);
|
||||
|
||||
@ -4,6 +4,7 @@
|
||||
#include "params.h"
|
||||
|
||||
|
||||
// inplace tolower() and add to pool
|
||||
static bool addpool(strpool **hostlist, char **s, const char *end)
|
||||
{
|
||||
char *p;
|
||||
@ -22,7 +23,6 @@ static bool addpool(strpool **hostlist, char **s, const char *end)
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
bool AppendHostList(strpool **hostlist, char *filename)
|
||||
{
|
||||
char *p, *e, s[256], *zbuf;
|
||||
@ -106,6 +106,12 @@ bool LoadHostLists(strpool **hostlist, struct str_list_head *file_list)
|
||||
return true;
|
||||
}
|
||||
|
||||
bool NonEmptyHostlist(strpool **hostlist)
|
||||
{
|
||||
// add impossible hostname if the list is empty
|
||||
return *hostlist ? true : StrPoolAddStrLen(hostlist, "@&()", 4);
|
||||
}
|
||||
|
||||
|
||||
bool SearchHostList(strpool *hostlist, const char *host)
|
||||
{
|
||||
@ -126,12 +132,17 @@ bool SearchHostList(strpool *hostlist, const char *host)
|
||||
}
|
||||
|
||||
// return : true = apply fooling, false = do not apply
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host)
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host, bool *excluded)
|
||||
{
|
||||
if (excluded) *excluded = false;
|
||||
if (hostlist_exclude)
|
||||
{
|
||||
if (params.debug) printf("Checking exclude hostlist\n");
|
||||
if (SearchHostList(hostlist_exclude, host)) return false;
|
||||
if (SearchHostList(hostlist_exclude, host))
|
||||
{
|
||||
if (excluded) *excluded = true;
|
||||
return false;
|
||||
}
|
||||
}
|
||||
if (hostlist)
|
||||
{
|
||||
|
||||
@ -1,10 +1,11 @@
|
||||
#pragma once
|
||||
|
||||
#include <stdbool.h>
|
||||
#include "strpool.h"
|
||||
#include "pools.h"
|
||||
|
||||
bool AppendHostList(strpool **hostlist, char *filename);
|
||||
bool LoadHostLists(strpool **hostlist, struct str_list_head *file_list);
|
||||
bool NonEmptyHostlist(strpool **hostlist);
|
||||
bool SearchHostList(strpool *hostlist, const char *host);
|
||||
// return : true = apply fooling, false = do not apply
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host);
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host, bool *excluded);
|
||||
|
||||
108
nfq/nfqws.c
108
nfq/nfqws.c
@ -8,6 +8,8 @@
|
||||
#include "params.h"
|
||||
#include "protocol.h"
|
||||
#include "hostlist.h"
|
||||
#include "gzip.h"
|
||||
#include "pools.h"
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
@ -24,6 +26,7 @@
|
||||
#include <time.h>
|
||||
#include <sys/param.h>
|
||||
#include <sys/socket.h>
|
||||
#include <sys/stat.h>
|
||||
#include <netinet/in.h>
|
||||
|
||||
#ifdef __linux__
|
||||
@ -73,6 +76,12 @@ static void onusr1(int sig)
|
||||
ConntrackPoolDump(¶ms.conntrack);
|
||||
printf("\n");
|
||||
}
|
||||
static void onusr2(int sig)
|
||||
{
|
||||
printf("\nHOSTFAIL POOL DUMP\n");
|
||||
HostFailPoolDump(params.hostlist_auto_fail_counters);
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
|
||||
|
||||
@ -284,6 +293,7 @@ static int nfq_main(void)
|
||||
|
||||
signal(SIGHUP, onhup);
|
||||
signal(SIGUSR1, onusr1);
|
||||
signal(SIGUSR2, onusr2);
|
||||
|
||||
desync_init();
|
||||
|
||||
@ -553,7 +563,11 @@ static void exithelp(void)
|
||||
" --dpi-desync-udplen-pattern=<filename>|0xHEX\t; udp tail fill pattern\n"
|
||||
" --dpi-desync-cutoff=[n|d|s]N\t\t\t; apply dpi desync only to packet numbers (n, default), data packet numbers (d), relative sequence (s) less than N\n"
|
||||
" --hostlist=<filename>\t\t\t\t; apply dpi desync only to the listed hosts (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
|
||||
" --hostlist-exclude=<filename>\t\t\t; do not apply dpi desync to the listed hosts (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n",
|
||||
" --hostlist-exclude=<filename>\t\t\t; do not apply dpi desync to the listed hosts (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
|
||||
" --hostlist-auto=<filename>\t\t\t; detect DPI blocks and build hostlist automatically\n"
|
||||
" --hostlist-auto-fail-threshold=<int>\t\t; how many failed attempts cause hostname to be added to auto hostlist (default : %d)\n"
|
||||
" --hostlist-auto-fail-time=<int>\t\t; all failed attemps must be within these seconds (default : %d)\n"
|
||||
" --hostlist-auto-retrans-threshold=<int>\t; how many request retransmissions cause attempt to fail (default : %d)\n",
|
||||
CTRACK_T_SYN, CTRACK_T_EST, CTRACK_T_FIN, CTRACK_T_UDP,
|
||||
#if defined(__linux__) || defined(SO_USER_COOKIE)
|
||||
DPI_DESYNC_FWMARK_DEFAULT,DPI_DESYNC_FWMARK_DEFAULT,
|
||||
@ -562,7 +576,8 @@ static void exithelp(void)
|
||||
DPI_DESYNC_MAX_FAKE_LEN, IPFRAG_UDP_DEFAULT,
|
||||
DPI_DESYNC_MAX_FAKE_LEN, IPFRAG_TCP_DEFAULT,
|
||||
BADSEQ_INCREMENT_DEFAULT, BADSEQ_ACK_INCREMENT_DEFAULT,
|
||||
UDPLEN_INCREMENT_DEFAULT
|
||||
UDPLEN_INCREMENT_DEFAULT,
|
||||
HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT, HOSTLIST_AUTO_FAIL_TIME_DEFAULT, HOSTLIST_AUTO_RETRANS_THRESHOLD_DEFAULT
|
||||
);
|
||||
exit(1);
|
||||
}
|
||||
@ -573,16 +588,9 @@ static void cleanup_params(void)
|
||||
|
||||
strlist_destroy(¶ms.hostlist_files);
|
||||
strlist_destroy(¶ms.hostlist_exclude_files);
|
||||
if (params.hostlist_exclude)
|
||||
{
|
||||
StrPoolDestroy(¶ms.hostlist_exclude);
|
||||
params.hostlist_exclude = NULL;
|
||||
}
|
||||
if (params.hostlist)
|
||||
{
|
||||
StrPoolDestroy(¶ms.hostlist);
|
||||
params.hostlist = NULL;
|
||||
}
|
||||
StrPoolDestroy(¶ms.hostlist_exclude);
|
||||
StrPoolDestroy(¶ms.hostlist);
|
||||
HostFailPoolDestroy(¶ms.hostlist_auto_fail_counters);
|
||||
}
|
||||
static void exithelp_clean(void)
|
||||
{
|
||||
@ -641,7 +649,7 @@ int main(int argc, char **argv)
|
||||
int option_index = 0;
|
||||
bool daemon = false;
|
||||
char pidfile[256];
|
||||
|
||||
|
||||
srandom(time(NULL));
|
||||
|
||||
memset(¶ms, 0, sizeof(params));
|
||||
@ -674,10 +682,13 @@ int main(int argc, char **argv)
|
||||
params.desync_badseq_ack_increment = BADSEQ_ACK_INCREMENT_DEFAULT;
|
||||
params.wssize_cutoff_mode = params.desync_cutoff_mode = 'n'; // packet number by default
|
||||
params.udplen_increment = UDPLEN_INCREMENT_DEFAULT;
|
||||
params.hostlist_auto_fail_threshold = HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT;
|
||||
params.hostlist_auto_fail_time = HOSTLIST_AUTO_FAIL_TIME_DEFAULT;
|
||||
params.hostlist_auto_retrans_threshold = HOSTLIST_AUTO_RETRANS_THRESHOLD_DEFAULT;
|
||||
|
||||
LIST_INIT(¶ms.hostlist_files);
|
||||
LIST_INIT(¶ms.hostlist_exclude_files);
|
||||
|
||||
|
||||
if (can_drop_root()) // are we root ?
|
||||
{
|
||||
params.uid = params.gid = 0x7FFFFFFF; // default uid:gid
|
||||
@ -737,9 +748,14 @@ int main(int argc, char **argv)
|
||||
{"dpi-desync-cutoff",required_argument,0,0},// optidx=37
|
||||
{"hostlist",required_argument,0,0}, // optidx=38
|
||||
{"hostlist-exclude",required_argument,0,0}, // optidx=39
|
||||
{"hostlist-auto",required_argument,0,0}, // optidx=40
|
||||
{"hostlist-auto-fail-threshold",required_argument,0,0}, // optidx=41
|
||||
{"hostlist-auto-fail-time",required_argument,0,0}, // optidx=42
|
||||
{"hostlist-auto-retrans-threshold",required_argument,0,0}, // optidx=43
|
||||
|
||||
#ifdef __linux__
|
||||
{"bind-fix4",no_argument,0,0}, // optidx=40
|
||||
{"bind-fix6",no_argument,0,0}, // optidx=41
|
||||
{"bind-fix4",no_argument,0,0}, // optidx=44
|
||||
{"bind-fix6",no_argument,0,0}, // optidx=45
|
||||
#endif
|
||||
{NULL,0,NULL,0}
|
||||
};
|
||||
@ -1069,11 +1085,66 @@ int main(int argc, char **argv)
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 40: /* hostlist-auto */
|
||||
if (*params.hostlist_auto_filename)
|
||||
{
|
||||
fprintf(stderr, "only one auto hostlist is supported\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
{
|
||||
FILE *F = fopen(optarg,"a+t");
|
||||
if (!F)
|
||||
{
|
||||
fprintf(stderr, "cannot create %s\n", optarg);
|
||||
exit_clean(1);
|
||||
}
|
||||
bool bGzip = is_gzip(F);
|
||||
fclose(F);
|
||||
if (bGzip)
|
||||
{
|
||||
fprintf(stderr, "gzipped auto hostlists are not supported\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
if (params.droproot && chown(optarg, params.uid, -1))
|
||||
fprintf(stderr, "could not chown %s. auto hostlist file may not be writable after privilege drop\n", optarg);
|
||||
}
|
||||
if (!strlist_add(¶ms.hostlist_files, optarg))
|
||||
{
|
||||
fprintf(stderr, "strlist_add failed\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
strncpy(params.hostlist_auto_filename, optarg, sizeof(params.hostlist_auto_filename));
|
||||
params.hostlist_auto_filename[sizeof(params.hostlist_auto_filename) - 1] = '\0';
|
||||
break;
|
||||
case 41: /* hostlist-auto-fail-threshold */
|
||||
params.hostlist_auto_fail_threshold = (uint8_t)atoi(optarg);
|
||||
if (params.hostlist_auto_fail_threshold<1 || params.hostlist_auto_fail_threshold>20)
|
||||
{
|
||||
fprintf(stderr, "auto hostlist fail threshold must be within 1..20\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 42: /* hostlist-auto-fail-time */
|
||||
params.hostlist_auto_fail_time = (uint8_t)atoi(optarg);
|
||||
if (params.hostlist_auto_fail_time<1)
|
||||
{
|
||||
fprintf(stderr, "auto hostlist fail time is not valid\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 43: /* hostlist-auto-retrans-threshold */
|
||||
params.hostlist_auto_retrans_threshold = (uint8_t)atoi(optarg);
|
||||
if (params.hostlist_auto_retrans_threshold<2 || params.hostlist_auto_retrans_threshold>10)
|
||||
{
|
||||
fprintf(stderr, "auto hostlist fail threshold must be within 2..10\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
#ifdef __linux__
|
||||
case 40: /* bind-fix4 */
|
||||
case 44: /* bind-fix4 */
|
||||
params.bind_fix4 = true;
|
||||
break;
|
||||
case 41: /* bind-fix6 */
|
||||
case 45: /* bind-fix6 */
|
||||
params.bind_fix6 = true;
|
||||
break;
|
||||
#endif
|
||||
@ -1094,6 +1165,7 @@ int main(int argc, char **argv)
|
||||
fprintf(stderr, "Include hostlist load failed\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
if (*params.hostlist_auto_filename) NonEmptyHostlist(¶ms.hostlist);
|
||||
if (!LoadHostLists(¶ms.hostlist_exclude, ¶ms.hostlist_exclude_files))
|
||||
{
|
||||
fprintf(stderr, "Exclude hostlist load failed\n");
|
||||
|
||||
10
nfq/params.h
10
nfq/params.h
@ -1,7 +1,7 @@
|
||||
#pragma once
|
||||
|
||||
#include "params.h"
|
||||
#include "strpool.h"
|
||||
#include "pools.h"
|
||||
#include "conntrack.h"
|
||||
#include "desync.h"
|
||||
|
||||
@ -26,6 +26,11 @@
|
||||
|
||||
#define UDPLEN_INCREMENT_DEFAULT 2
|
||||
|
||||
#define HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT 2
|
||||
#define HOSTLIST_AUTO_FAIL_TIME_DEFAULT 60
|
||||
#define HOSTLIST_AUTO_RETRANS_THRESHOLD_DEFAULT 3
|
||||
|
||||
|
||||
struct params_s
|
||||
{
|
||||
bool debug;
|
||||
@ -59,6 +64,9 @@ struct params_s
|
||||
|
||||
strpool *hostlist, *hostlist_exclude;
|
||||
struct str_list_head hostlist_files, hostlist_exclude_files;
|
||||
char hostlist_auto_filename[PATH_MAX];
|
||||
int hostlist_auto_fail_threshold, hostlist_auto_fail_time, hostlist_auto_retrans_threshold;
|
||||
hostfail_pool *hostlist_auto_fail_counters;
|
||||
|
||||
unsigned int ctrack_t_syn, ctrack_t_est, ctrack_t_fin, ctrack_t_udp;
|
||||
t_conntrack conntrack;
|
||||
|
||||
152
nfq/pools.c
Normal file
152
nfq/pools.c
Normal file
@ -0,0 +1,152 @@
|
||||
#define _GNU_SOURCE
|
||||
#include "pools.h"
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#define DESTROY_STR_POOL(etype, ppool) \
|
||||
etype *elem, *tmp; \
|
||||
HASH_ITER(hh, *ppool, elem, tmp) { \
|
||||
free(elem->str); \
|
||||
HASH_DEL(*ppool, elem); \
|
||||
free(elem); \
|
||||
}
|
||||
|
||||
#define ADD_STR_POOL(etype, ppool, keystr, keystr_len) \
|
||||
etype *elem; \
|
||||
if (!(elem = (etype*)malloc(sizeof(etype)))) \
|
||||
return false; \
|
||||
if (!(elem->str = malloc(keystr_len + 1))) \
|
||||
{ \
|
||||
free(elem); \
|
||||
return false; \
|
||||
} \
|
||||
memcpy(elem->str, keystr, keystr_len); \
|
||||
elem->str[keystr_len] = 0; \
|
||||
oom = false; \
|
||||
HASH_ADD_KEYPTR(hh, *ppool, elem->str, strlen(elem->str), elem); \
|
||||
if (oom) \
|
||||
{ \
|
||||
free(elem->str); \
|
||||
free(elem); \
|
||||
return false; \
|
||||
}
|
||||
|
||||
|
||||
#undef uthash_nonfatal_oom
|
||||
#define uthash_nonfatal_oom(elt) ut_oom_recover(elt)
|
||||
static bool oom = false;
|
||||
static void ut_oom_recover(void *elem)
|
||||
{
|
||||
oom = true;
|
||||
}
|
||||
|
||||
// for not zero terminated strings
|
||||
bool StrPoolAddStrLen(strpool **pp, const char *s, size_t slen)
|
||||
{
|
||||
ADD_STR_POOL(strpool, pp, s, slen)
|
||||
return true;
|
||||
}
|
||||
// for zero terminated strings
|
||||
bool StrPoolAddStr(strpool **pp, const char *s)
|
||||
{
|
||||
return StrPoolAddStrLen(pp, s, strlen(s));
|
||||
}
|
||||
|
||||
bool StrPoolCheckStr(strpool *p, const char *s)
|
||||
{
|
||||
strpool *elem;
|
||||
HASH_FIND_STR(p, s, elem);
|
||||
return elem != NULL;
|
||||
}
|
||||
|
||||
void StrPoolDestroy(strpool **pp)
|
||||
{
|
||||
DESTROY_STR_POOL(strpool, pp)
|
||||
}
|
||||
|
||||
|
||||
|
||||
void HostFailPoolDestroy(hostfail_pool **pp)
|
||||
{
|
||||
DESTROY_STR_POOL(hostfail_pool, pp)
|
||||
}
|
||||
hostfail_pool * HostFailPoolAdd(hostfail_pool **pp,const char *s,int fail_time)
|
||||
{
|
||||
size_t slen = strlen(s);
|
||||
ADD_STR_POOL(hostfail_pool, pp, s, slen)
|
||||
elem->expire = time(NULL) + fail_time;
|
||||
return elem;
|
||||
}
|
||||
hostfail_pool *HostFailPoolFind(hostfail_pool *p,const char *s)
|
||||
{
|
||||
hostfail_pool *elem;
|
||||
HASH_FIND_STR(p, s, elem);
|
||||
return elem;
|
||||
}
|
||||
void HostFailPoolDel(hostfail_pool **p, hostfail_pool *elem)
|
||||
{
|
||||
HASH_DEL(*p, elem);
|
||||
free(elem);
|
||||
}
|
||||
void HostFailPoolPurge(hostfail_pool **pp)
|
||||
{
|
||||
hostfail_pool *elem, *tmp;
|
||||
time_t now = time(NULL);
|
||||
HASH_ITER(hh, *pp, elem, tmp)
|
||||
{
|
||||
if (now >= elem->expire)
|
||||
{
|
||||
free(elem->str);
|
||||
HASH_DEL(*pp, elem);
|
||||
free(elem);
|
||||
}
|
||||
}
|
||||
}
|
||||
static time_t host_fail_purge_prev=0;
|
||||
void HostFailPoolPurgeRateLimited(hostfail_pool **pp)
|
||||
{
|
||||
time_t now = time(NULL);
|
||||
// do not purge too often to save resources
|
||||
if (host_fail_purge_prev != now)
|
||||
{
|
||||
HostFailPoolPurge(pp);
|
||||
host_fail_purge_prev = now;
|
||||
}
|
||||
}
|
||||
void HostFailPoolDump(hostfail_pool *p)
|
||||
{
|
||||
hostfail_pool *elem, *tmp;
|
||||
time_t now = time(NULL);
|
||||
HASH_ITER(hh, p, elem, tmp)
|
||||
printf("host=%s counter=%d time_left=%lld\n",elem->str,elem->counter,(long long int)elem->expire-now);
|
||||
}
|
||||
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename)
|
||||
{
|
||||
struct str_list *entry = malloc(sizeof(struct str_list));
|
||||
if (!entry) return false;
|
||||
entry->str = strdup(filename);
|
||||
if (!entry->str)
|
||||
{
|
||||
free(entry);
|
||||
return false;
|
||||
}
|
||||
LIST_INSERT_HEAD(head, entry, next);
|
||||
return true;
|
||||
}
|
||||
static void strlist_entry_destroy(struct str_list *entry)
|
||||
{
|
||||
if (entry->str) free(entry->str);
|
||||
free(entry);
|
||||
}
|
||||
void strlist_destroy(struct str_list_head *head)
|
||||
{
|
||||
struct str_list *entry;
|
||||
while ((entry = LIST_FIRST(head)))
|
||||
{
|
||||
LIST_REMOVE(entry, next);
|
||||
strlist_entry_destroy(entry);
|
||||
}
|
||||
}
|
||||
46
nfq/pools.h
Normal file
46
nfq/pools.h
Normal file
@ -0,0 +1,46 @@
|
||||
#pragma once
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <ctype.h>
|
||||
#include <sys/queue.h>
|
||||
#include <time.h>
|
||||
|
||||
//#define HASH_BLOOM 20
|
||||
#define HASH_NONFATAL_OOM 1
|
||||
#define HASH_FUNCTION HASH_BER
|
||||
#include "uthash.h"
|
||||
|
||||
typedef struct strpool {
|
||||
char *str; /* key */
|
||||
UT_hash_handle hh; /* makes this structure hashable */
|
||||
} strpool;
|
||||
|
||||
void StrPoolDestroy(strpool **pp);
|
||||
bool StrPoolAddStr(strpool **pp,const char *s);
|
||||
bool StrPoolAddStrLen(strpool **pp,const char *s,size_t slen);
|
||||
bool StrPoolCheckStr(strpool *p,const char *s);
|
||||
|
||||
struct str_list {
|
||||
char *str;
|
||||
LIST_ENTRY(str_list) next;
|
||||
};
|
||||
LIST_HEAD(str_list_head, str_list);
|
||||
|
||||
|
||||
typedef struct hostfail_pool {
|
||||
char *str; /* key */
|
||||
int counter; /* value */
|
||||
time_t expire; /* when to expire record (unixtime) */
|
||||
UT_hash_handle hh; /* makes this structure hashable */
|
||||
} hostfail_pool;
|
||||
|
||||
void HostFailPoolDestroy(hostfail_pool **pp);
|
||||
hostfail_pool *HostFailPoolAdd(hostfail_pool **pp,const char *s,int fail_time);
|
||||
hostfail_pool *HostFailPoolFind(hostfail_pool *p,const char *s);
|
||||
void HostFailPoolDel(hostfail_pool **pp, hostfail_pool *elem);
|
||||
void HostFailPoolPurge(hostfail_pool **pp);
|
||||
void HostFailPoolPurgeRateLimited(hostfail_pool **pp);
|
||||
void HostFailPoolDump(hostfail_pool *p);
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename);
|
||||
void strlist_destroy(struct str_list_head *head);
|
||||
160
nfq/protocol.c
160
nfq/protocol.c
@ -20,69 +20,95 @@ bool IsHttp(const uint8_t *data, size_t len)
|
||||
}
|
||||
return false;
|
||||
}
|
||||
bool HttpExtractHost(const uint8_t *data, size_t len, char *host, size_t len_host)
|
||||
bool IsHttpReply(const uint8_t *data, size_t len)
|
||||
{
|
||||
// HTTP/1.x 200\r\n
|
||||
return len>14 && !memcmp(data,"HTTP/1.",7) && (data[7]=='0' || data[7]=='1') && data[8]==' ' &&
|
||||
data[9]>='0' && data[9]<='9' &&
|
||||
data[10]>='0' && data[10]<='9' &&
|
||||
data[11]>='0' && data[11]<='9';
|
||||
}
|
||||
int HttpReplyCode(const uint8_t *data, size_t len)
|
||||
{
|
||||
return (data[9]-'0')*100 + (data[10]-'0')*10 + (data[11]-'0');
|
||||
}
|
||||
bool HttpExtractHeader(const uint8_t *data, size_t len, const char *header, char *buf, size_t len_buf)
|
||||
{
|
||||
const uint8_t *p, *s, *e = data + len;
|
||||
|
||||
p = (uint8_t*)strncasestr((char*)data, "\nHost:", len);
|
||||
p = (uint8_t*)strncasestr((char*)data, header, len);
|
||||
if (!p) return false;
|
||||
p += 6;
|
||||
p += strlen(header);
|
||||
while (p < e && (*p == ' ' || *p == '\t')) p++;
|
||||
s = p;
|
||||
while (s < e && (*s != '\r' && *s != '\n' && *s != ' ' && *s != '\t')) s++;
|
||||
if (s > p)
|
||||
{
|
||||
size_t slen = s - p;
|
||||
if (host && len_host)
|
||||
if (buf && len_buf)
|
||||
{
|
||||
if (slen >= len_host) slen = len_host - 1;
|
||||
for (size_t i = 0; i < slen; i++) host[i] = tolower(p[i]);
|
||||
host[slen] = 0;
|
||||
if (slen >= len_buf) slen = len_buf - 1;
|
||||
for (size_t i = 0; i < slen; i++) buf[i] = tolower(p[i]);
|
||||
buf[slen] = 0;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
static uint8_t tvb_get_varint(const uint8_t *tvb, uint64_t *value)
|
||||
bool HttpExtractHost(const uint8_t *data, size_t len, char *host, size_t len_host)
|
||||
{
|
||||
switch (*tvb >> 6)
|
||||
return HttpExtractHeader(data, len, "\nHost:", host, len_host);
|
||||
}
|
||||
const char *HttpFind2ndLevelDomain(const char *host)
|
||||
{
|
||||
const char *p=NULL;
|
||||
if (*host)
|
||||
{
|
||||
case 0: /* 0b00 => 1 byte length (6 bits Usable) */
|
||||
if (value) *value = *tvb & 0x3F;
|
||||
return 1;
|
||||
case 1: /* 0b01 => 2 bytes length (14 bits Usable) */
|
||||
if (value) *value = pntoh16(tvb) & 0x3FFF;
|
||||
return 2;
|
||||
case 2: /* 0b10 => 4 bytes length (30 bits Usable) */
|
||||
if (value) *value = pntoh32(tvb) & 0x3FFFFFFF;
|
||||
return 4;
|
||||
case 3: /* 0b11 => 8 bytes length (62 bits Usable) */
|
||||
if (value) *value = pntoh64(tvb) & 0x3FFFFFFFFFFFFFFF;
|
||||
return 8;
|
||||
for (p = host + strlen(host)-1; p>host && *p!='.'; p--);
|
||||
if (*p=='.') for (p--; p>host && *p!='.'; p--);
|
||||
if (*p=='.') p++;
|
||||
}
|
||||
return 0;
|
||||
return p;
|
||||
}
|
||||
static uint8_t tvb_get_size(uint8_t tvb)
|
||||
// DPI redirects are global redirects to another domain
|
||||
bool HttpReplyLooksLikeDPIRedirect(const uint8_t *data, size_t len, const char *host)
|
||||
{
|
||||
return 1 << (tvb >> 6);
|
||||
char loc[256],*redirect_host, *p;
|
||||
int code;
|
||||
|
||||
if (!host || !*host) return false;
|
||||
|
||||
code = HttpReplyCode(data,len);
|
||||
|
||||
if (code!=302 && code!=307 || !HttpExtractHeader(data,len,"\nLocation:",loc,sizeof(loc))) return false;
|
||||
|
||||
// something like : https://censor.net/badpage.php?reason=denied&source=RKN
|
||||
|
||||
if (!strncmp(loc,"http://",7))
|
||||
redirect_host=loc+7;
|
||||
else if (!strncmp(loc,"https://",8))
|
||||
redirect_host=loc+8;
|
||||
else
|
||||
return false;
|
||||
|
||||
// somethinkg like : censor.net/badpage.php?reason=denied&source=RKN
|
||||
|
||||
for(p=redirect_host; *p && *p!='/' ; p++);
|
||||
*p=0;
|
||||
if (!*redirect_host) return false;
|
||||
|
||||
// somethinkg like : censor.net
|
||||
|
||||
// extract 2nd level domains
|
||||
|
||||
const char *dhost = HttpFind2ndLevelDomain(host);
|
||||
const char *drhost = HttpFind2ndLevelDomain(redirect_host);
|
||||
|
||||
return strcasecmp(dhost, drhost)!=0;
|
||||
}
|
||||
|
||||
bool IsQUICCryptoHello(const uint8_t *data, size_t len, size_t *hello_offset, size_t *hello_len)
|
||||
{
|
||||
size_t offset = 1;
|
||||
uint64_t coff, clen;
|
||||
if (len < 3 || *data != 6) return false;
|
||||
if ((offset+tvb_get_size(data[offset])) >= len) return false;
|
||||
offset += tvb_get_varint(data + offset, &coff);
|
||||
// offset must be 0 if it's a full segment, not just a chunk
|
||||
if (coff || (offset+tvb_get_size(data[offset])) >= len) return false;
|
||||
offset += tvb_get_varint(data + offset, &clen);
|
||||
if (data[offset] != 0x01 || (offset + clen) > len) return false;
|
||||
if (hello_offset) *hello_offset = offset;
|
||||
if (hello_len) *hello_len = (size_t)clen;
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
bool IsTLSClientHello(const uint8_t *data, size_t len)
|
||||
{
|
||||
return len >= 6 && data[0] == 0x16 && data[1] == 0x03 && data[2] >= 0x01 && data[2] <= 0x03 && data[5] == 0x01 && (pntoh16(data + 3) + 5) <= len;
|
||||
@ -188,13 +214,45 @@ bool TLSHelloExtractHostFromHandshake(const uint8_t *data, size_t len, char *hos
|
||||
}
|
||||
|
||||
|
||||
bool IsWireguardHandshakeInitiation(const uint8_t *data, size_t len)
|
||||
|
||||
static uint8_t tvb_get_varint(const uint8_t *tvb, uint64_t *value)
|
||||
{
|
||||
return len==148 && data[0]==1 && data[1]==0 && data[2]==0 && data[3]==0;
|
||||
switch (*tvb >> 6)
|
||||
{
|
||||
case 0: /* 0b00 => 1 byte length (6 bits Usable) */
|
||||
if (value) *value = *tvb & 0x3F;
|
||||
return 1;
|
||||
case 1: /* 0b01 => 2 bytes length (14 bits Usable) */
|
||||
if (value) *value = pntoh16(tvb) & 0x3FFF;
|
||||
return 2;
|
||||
case 2: /* 0b10 => 4 bytes length (30 bits Usable) */
|
||||
if (value) *value = pntoh32(tvb) & 0x3FFFFFFF;
|
||||
return 4;
|
||||
case 3: /* 0b11 => 8 bytes length (62 bits Usable) */
|
||||
if (value) *value = pntoh64(tvb) & 0x3FFFFFFFFFFFFFFF;
|
||||
return 8;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
bool IsDhtD1(const uint8_t *data, size_t len)
|
||||
static uint8_t tvb_get_size(uint8_t tvb)
|
||||
{
|
||||
return len>=7 && data[0]=='d' && data[1]=='1' && data[len-1]=='e';
|
||||
return 1 << (tvb >> 6);
|
||||
}
|
||||
|
||||
bool IsQUICCryptoHello(const uint8_t *data, size_t len, size_t *hello_offset, size_t *hello_len)
|
||||
{
|
||||
size_t offset = 1;
|
||||
uint64_t coff, clen;
|
||||
if (len < 3 || *data != 6) return false;
|
||||
if ((offset+tvb_get_size(data[offset])) >= len) return false;
|
||||
offset += tvb_get_varint(data + offset, &coff);
|
||||
// offset must be 0 if it's a full segment, not just a chunk
|
||||
if (coff || (offset+tvb_get_size(data[offset])) >= len) return false;
|
||||
offset += tvb_get_varint(data + offset, &clen);
|
||||
if (data[offset] != 0x01 || (offset + clen) > len) return false;
|
||||
if (hello_offset) *hello_offset = offset;
|
||||
if (hello_len) *hello_len = (size_t)clen;
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Returns the QUIC draft version or 0 if not applicable. */
|
||||
@ -258,7 +316,6 @@ static bool is_quic_v2(uint32_t version)
|
||||
return version == 0x709A50C4;
|
||||
}
|
||||
|
||||
|
||||
static bool quic_hkdf_expand_label(const uint8_t *secret, uint8_t secret_len, const char *label, uint8_t *out, size_t out_len)
|
||||
{
|
||||
uint8_t hkdflabel[64];
|
||||
@ -275,7 +332,6 @@ static bool quic_hkdf_expand_label(const uint8_t *secret, uint8_t secret_len, co
|
||||
return !hkdfExpand(SHA256, secret, secret_len, hkdflabel, hkdflabel_size, out, out_len);
|
||||
}
|
||||
|
||||
|
||||
static bool quic_derive_initial_secret(const quic_cid_t *cid, uint8_t *client_initial_secret, uint32_t version)
|
||||
{
|
||||
/*
|
||||
@ -505,7 +561,6 @@ bool QUICDefragCrypto(const uint8_t *clean,size_t clean_len, uint8_t *defrag,siz
|
||||
return found;
|
||||
}
|
||||
|
||||
|
||||
bool QUICExtractHostFromInitial(const uint8_t *data, size_t data_len, char *host, size_t len_host, bool *bDecryptOK, bool *bIsCryptoHello)
|
||||
{
|
||||
if (bIsCryptoHello) *bIsCryptoHello=false;
|
||||
@ -565,3 +620,14 @@ bool IsQUICInitial(const uint8_t *data, size_t len)
|
||||
// client hello cannot be too small. likely ACK
|
||||
return sz>=96;
|
||||
}
|
||||
|
||||
|
||||
|
||||
bool IsWireguardHandshakeInitiation(const uint8_t *data, size_t len)
|
||||
{
|
||||
return len==148 && data[0]==1 && data[1]==0 && data[2]==0 && data[3]==0;
|
||||
}
|
||||
bool IsDhtD1(const uint8_t *data, size_t len)
|
||||
{
|
||||
return len>=7 && data[0]=='d' && data[1]=='1' && data[len-1]=='e';
|
||||
}
|
||||
|
||||
@ -7,7 +7,15 @@
|
||||
#include "crypto/aes-gcm.h"
|
||||
|
||||
bool IsHttp(const uint8_t *data, size_t len);
|
||||
// header must be passed like this : "\nHost:"
|
||||
bool HttpExtractHeader(const uint8_t *data, size_t len, const char *header, char *buf, size_t len_buf);
|
||||
bool HttpExtractHost(const uint8_t *data, size_t len, char *host, size_t len_host);
|
||||
bool IsHttpReply(const uint8_t *data, size_t len);
|
||||
const char *HttpFind2ndLevelDomain(const char *host);
|
||||
// must be pre-checked by IsHttpReply
|
||||
int HttpReplyCode(const uint8_t *data, size_t len);
|
||||
// must be pre-checked by IsHttpReply
|
||||
bool HttpReplyLooksLikeDPIRedirect(const uint8_t *data, size_t len, const char *host);
|
||||
|
||||
bool IsTLSClientHello(const uint8_t *data, size_t len);
|
||||
bool TLSFindExt(const uint8_t *data, size_t len, uint16_t type, const uint8_t **ext, size_t *len_ext);
|
||||
|
||||
107
nfq/strpool.c
107
nfq/strpool.c
@ -1,107 +0,0 @@
|
||||
#define _GNU_SOURCE
|
||||
#include "strpool.h"
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#undef uthash_nonfatal_oom
|
||||
#define uthash_nonfatal_oom(elt) ut_oom_recover(elt)
|
||||
|
||||
static bool oom = false;
|
||||
static void ut_oom_recover(strpool *elem)
|
||||
{
|
||||
oom = true;
|
||||
}
|
||||
|
||||
// for zero terminated strings
|
||||
bool StrPoolAddStr(strpool **pp, const char *s)
|
||||
{
|
||||
strpool *elem;
|
||||
if (!(elem = (strpool*)malloc(sizeof(strpool))))
|
||||
return false;
|
||||
if (!(elem->str = strdup(s)))
|
||||
{
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
oom = false;
|
||||
HASH_ADD_KEYPTR(hh, *pp, elem->str, strlen(elem->str), elem);
|
||||
if (oom)
|
||||
{
|
||||
free(elem->str);
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
// for not zero terminated strings
|
||||
bool StrPoolAddStrLen(strpool **pp, const char *s, size_t slen)
|
||||
{
|
||||
strpool *elem;
|
||||
if (!(elem = (strpool*)malloc(sizeof(strpool))))
|
||||
return false;
|
||||
if (!(elem->str = malloc(slen + 1)))
|
||||
{
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
memcpy(elem->str, s, slen);
|
||||
elem->str[slen] = 0;
|
||||
oom = false;
|
||||
HASH_ADD_KEYPTR(hh, *pp, elem->str, strlen(elem->str), elem);
|
||||
if (oom)
|
||||
{
|
||||
free(elem->str);
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool StrPoolCheckStr(strpool *p, const char *s)
|
||||
{
|
||||
strpool *elem;
|
||||
HASH_FIND_STR(p, s, elem);
|
||||
return elem != NULL;
|
||||
}
|
||||
|
||||
void StrPoolDestroy(strpool **p)
|
||||
{
|
||||
strpool *elem, *tmp;
|
||||
HASH_ITER(hh, *p, elem, tmp) {
|
||||
free(elem->str);
|
||||
HASH_DEL(*p, elem);
|
||||
free(elem);
|
||||
}
|
||||
*p = NULL;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename)
|
||||
{
|
||||
struct str_list *entry = malloc(sizeof(struct str_list));
|
||||
if (!entry) return false;
|
||||
entry->str = strdup(filename);
|
||||
if (!entry->str)
|
||||
{
|
||||
free(entry);
|
||||
return false;
|
||||
}
|
||||
LIST_INSERT_HEAD(head, entry, next);
|
||||
return true;
|
||||
}
|
||||
static void strlist_entry_destroy(struct str_list *entry)
|
||||
{
|
||||
if (entry->str) free(entry->str);
|
||||
free(entry);
|
||||
}
|
||||
void strlist_destroy(struct str_list_head *head)
|
||||
{
|
||||
struct str_list *entry;
|
||||
while ((entry = LIST_FIRST(head)))
|
||||
{
|
||||
LIST_REMOVE(entry, next);
|
||||
strlist_entry_destroy(entry);
|
||||
}
|
||||
}
|
||||
@ -1,29 +0,0 @@
|
||||
#pragma once
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <ctype.h>
|
||||
#include <sys/queue.h>
|
||||
|
||||
//#define HASH_BLOOM 20
|
||||
#define HASH_NONFATAL_OOM 1
|
||||
#define HASH_FUNCTION HASH_BER
|
||||
#include "uthash.h"
|
||||
|
||||
typedef struct strpool {
|
||||
char *str; /* key */
|
||||
UT_hash_handle hh; /* makes this structure hashable */
|
||||
} strpool;
|
||||
|
||||
void StrPoolDestroy(strpool **p);
|
||||
bool StrPoolAddStr(strpool **pp,const char *s);
|
||||
bool StrPoolAddStrLen(strpool **pp,const char *s,size_t slen);
|
||||
bool StrPoolCheckStr(strpool *p,const char *s);
|
||||
|
||||
struct str_list {
|
||||
char *str;
|
||||
LIST_ENTRY(str_list) next;
|
||||
};
|
||||
LIST_HEAD(str_list_head, str_list);
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename);
|
||||
void strlist_destroy(struct str_list_head *head);
|
||||
@ -30,6 +30,15 @@ char *strncasestr(const char *s,const char *find, size_t slen)
|
||||
return (char *)s;
|
||||
}
|
||||
|
||||
bool append_to_list_file(const char *filename, const char *s)
|
||||
{
|
||||
FILE *F = fopen(filename,"at");
|
||||
if (!F) return false;
|
||||
bool bOK = fprintf(F,"%s\n",s)>0;
|
||||
fclose(F);
|
||||
return bOK;
|
||||
}
|
||||
|
||||
void ntop46(const struct sockaddr *sa, char *str, size_t len)
|
||||
{
|
||||
if (!len) return;
|
||||
|
||||
@ -8,6 +8,8 @@
|
||||
|
||||
char *strncasestr(const char *s,const char *find, size_t slen);
|
||||
|
||||
bool append_to_list_file(const char *filename, const char *s);
|
||||
|
||||
void ntop46(const struct sockaddr *sa, char *str, size_t len);
|
||||
void ntop46_port(const struct sockaddr *sa, char *str, size_t len);
|
||||
void print_sockaddr(const struct sockaddr *sa);
|
||||
|
||||
@ -4,6 +4,7 @@
|
||||
#include "params.h"
|
||||
|
||||
|
||||
// inplace tolower() and add to pool
|
||||
static bool addpool(strpool **hostlist, char **s, const char *end)
|
||||
{
|
||||
char *p;
|
||||
@ -22,7 +23,6 @@ static bool addpool(strpool **hostlist, char **s, const char *end)
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
bool AppendHostList(strpool **hostlist, char *filename)
|
||||
{
|
||||
char *p, *e, s[256], *zbuf;
|
||||
@ -106,6 +106,12 @@ bool LoadHostLists(strpool **hostlist, struct str_list_head *file_list)
|
||||
return true;
|
||||
}
|
||||
|
||||
bool NonEmptyHostlist(strpool **hostlist)
|
||||
{
|
||||
// add impossible hostname if the list is empty
|
||||
return *hostlist ? true : StrPoolAddStrLen(hostlist, "@&()", 4);
|
||||
}
|
||||
|
||||
|
||||
bool SearchHostList(strpool *hostlist, const char *host)
|
||||
{
|
||||
@ -126,12 +132,17 @@ bool SearchHostList(strpool *hostlist, const char *host)
|
||||
}
|
||||
|
||||
// return : true = apply fooling, false = do not apply
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host)
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host, bool *excluded)
|
||||
{
|
||||
if (excluded) *excluded = false;
|
||||
if (hostlist_exclude)
|
||||
{
|
||||
if (params.debug) printf("Checking exclude hostlist\n");
|
||||
if (SearchHostList(hostlist_exclude, host)) return false;
|
||||
if (SearchHostList(hostlist_exclude, host))
|
||||
{
|
||||
if (excluded) *excluded = true;
|
||||
return false;
|
||||
}
|
||||
}
|
||||
if (hostlist)
|
||||
{
|
||||
|
||||
@ -1,10 +1,11 @@
|
||||
#pragma once
|
||||
|
||||
#include <stdbool.h>
|
||||
#include "strpool.h"
|
||||
#include "pools.h"
|
||||
|
||||
bool AppendHostList(strpool **hostlist, char *filename);
|
||||
bool LoadHostLists(strpool **hostlist, struct str_list_head *file_list);
|
||||
bool NonEmptyHostlist(strpool **hostlist);
|
||||
bool SearchHostList(strpool *hostlist, const char *host);
|
||||
// return : true = apply fooling, false = do not apply
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host);
|
||||
bool HostlistCheck(strpool *hostlist, strpool *hostlist_exclude, const char *host, bool *excluded);
|
||||
|
||||
@ -5,7 +5,10 @@
|
||||
#include <stdint.h>
|
||||
#include <sys/param.h>
|
||||
#include <sys/queue.h>
|
||||
#include "strpool.h"
|
||||
#include "pools.h"
|
||||
|
||||
#define HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT 2
|
||||
#define HOSTLIST_AUTO_FAIL_TIME_DEFAULT 60
|
||||
|
||||
enum splithttpreq { split_none = 0, split_method, split_host };
|
||||
enum tlsrec { tlsrec_none = 0, tlsrec_sni, tlsrec_pos };
|
||||
@ -53,6 +56,9 @@ struct params_s
|
||||
|
||||
strpool *hostlist, *hostlist_exclude;
|
||||
struct str_list_head hostlist_files, hostlist_exclude_files;
|
||||
char hostlist_auto_filename[PATH_MAX];
|
||||
int hostlist_auto_fail_threshold, hostlist_auto_fail_time;
|
||||
hostfail_pool *hostlist_auto_fail_counters;
|
||||
|
||||
int debug;
|
||||
|
||||
|
||||
152
tpws/pools.c
Normal file
152
tpws/pools.c
Normal file
@ -0,0 +1,152 @@
|
||||
#define _GNU_SOURCE
|
||||
#include "pools.h"
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#define DESTROY_STR_POOL(etype, ppool) \
|
||||
etype *elem, *tmp; \
|
||||
HASH_ITER(hh, *ppool, elem, tmp) { \
|
||||
free(elem->str); \
|
||||
HASH_DEL(*ppool, elem); \
|
||||
free(elem); \
|
||||
}
|
||||
|
||||
#define ADD_STR_POOL(etype, ppool, keystr, keystr_len) \
|
||||
etype *elem; \
|
||||
if (!(elem = (etype*)malloc(sizeof(etype)))) \
|
||||
return false; \
|
||||
if (!(elem->str = malloc(keystr_len + 1))) \
|
||||
{ \
|
||||
free(elem); \
|
||||
return false; \
|
||||
} \
|
||||
memcpy(elem->str, keystr, keystr_len); \
|
||||
elem->str[keystr_len] = 0; \
|
||||
oom = false; \
|
||||
HASH_ADD_KEYPTR(hh, *ppool, elem->str, strlen(elem->str), elem); \
|
||||
if (oom) \
|
||||
{ \
|
||||
free(elem->str); \
|
||||
free(elem); \
|
||||
return false; \
|
||||
}
|
||||
|
||||
|
||||
#undef uthash_nonfatal_oom
|
||||
#define uthash_nonfatal_oom(elt) ut_oom_recover(elt)
|
||||
static bool oom = false;
|
||||
static void ut_oom_recover(void *elem)
|
||||
{
|
||||
oom = true;
|
||||
}
|
||||
|
||||
// for not zero terminated strings
|
||||
bool StrPoolAddStrLen(strpool **pp, const char *s, size_t slen)
|
||||
{
|
||||
ADD_STR_POOL(strpool, pp, s, slen)
|
||||
return true;
|
||||
}
|
||||
// for zero terminated strings
|
||||
bool StrPoolAddStr(strpool **pp, const char *s)
|
||||
{
|
||||
return StrPoolAddStrLen(pp, s, strlen(s));
|
||||
}
|
||||
|
||||
bool StrPoolCheckStr(strpool *p, const char *s)
|
||||
{
|
||||
strpool *elem;
|
||||
HASH_FIND_STR(p, s, elem);
|
||||
return elem != NULL;
|
||||
}
|
||||
|
||||
void StrPoolDestroy(strpool **pp)
|
||||
{
|
||||
DESTROY_STR_POOL(strpool, pp)
|
||||
}
|
||||
|
||||
|
||||
|
||||
void HostFailPoolDestroy(hostfail_pool **pp)
|
||||
{
|
||||
DESTROY_STR_POOL(hostfail_pool, pp)
|
||||
}
|
||||
hostfail_pool * HostFailPoolAdd(hostfail_pool **pp,const char *s,int fail_time)
|
||||
{
|
||||
size_t slen = strlen(s);
|
||||
ADD_STR_POOL(hostfail_pool, pp, s, slen)
|
||||
elem->expire = time(NULL) + fail_time;
|
||||
return elem;
|
||||
}
|
||||
hostfail_pool *HostFailPoolFind(hostfail_pool *p,const char *s)
|
||||
{
|
||||
hostfail_pool *elem;
|
||||
HASH_FIND_STR(p, s, elem);
|
||||
return elem;
|
||||
}
|
||||
void HostFailPoolDel(hostfail_pool **p, hostfail_pool *elem)
|
||||
{
|
||||
HASH_DEL(*p, elem);
|
||||
free(elem);
|
||||
}
|
||||
void HostFailPoolPurge(hostfail_pool **pp)
|
||||
{
|
||||
hostfail_pool *elem, *tmp;
|
||||
time_t now = time(NULL);
|
||||
HASH_ITER(hh, *pp, elem, tmp)
|
||||
{
|
||||
if (now >= elem->expire)
|
||||
{
|
||||
free(elem->str);
|
||||
HASH_DEL(*pp, elem);
|
||||
free(elem);
|
||||
}
|
||||
}
|
||||
}
|
||||
static time_t host_fail_purge_prev=0;
|
||||
void HostFailPoolPurgeRateLimited(hostfail_pool **pp)
|
||||
{
|
||||
time_t now = time(NULL);
|
||||
// do not purge too often to save resources
|
||||
if (host_fail_purge_prev != now)
|
||||
{
|
||||
HostFailPoolPurge(pp);
|
||||
host_fail_purge_prev = now;
|
||||
}
|
||||
}
|
||||
void HostFailPoolDump(hostfail_pool *p)
|
||||
{
|
||||
hostfail_pool *elem, *tmp;
|
||||
time_t now = time(NULL);
|
||||
HASH_ITER(hh, p, elem, tmp)
|
||||
printf("host=%s counter=%d time_left=%lld\n",elem->str,elem->counter,(long long int)elem->expire-now);
|
||||
}
|
||||
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename)
|
||||
{
|
||||
struct str_list *entry = malloc(sizeof(struct str_list));
|
||||
if (!entry) return false;
|
||||
entry->str = strdup(filename);
|
||||
if (!entry->str)
|
||||
{
|
||||
free(entry);
|
||||
return false;
|
||||
}
|
||||
LIST_INSERT_HEAD(head, entry, next);
|
||||
return true;
|
||||
}
|
||||
static void strlist_entry_destroy(struct str_list *entry)
|
||||
{
|
||||
if (entry->str) free(entry->str);
|
||||
free(entry);
|
||||
}
|
||||
void strlist_destroy(struct str_list_head *head)
|
||||
{
|
||||
struct str_list *entry;
|
||||
while ((entry = LIST_FIRST(head)))
|
||||
{
|
||||
LIST_REMOVE(entry, next);
|
||||
strlist_entry_destroy(entry);
|
||||
}
|
||||
}
|
||||
46
tpws/pools.h
Normal file
46
tpws/pools.h
Normal file
@ -0,0 +1,46 @@
|
||||
#pragma once
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <ctype.h>
|
||||
#include <sys/queue.h>
|
||||
#include <time.h>
|
||||
|
||||
//#define HASH_BLOOM 20
|
||||
#define HASH_NONFATAL_OOM 1
|
||||
#define HASH_FUNCTION HASH_BER
|
||||
#include "uthash.h"
|
||||
|
||||
typedef struct strpool {
|
||||
char *str; /* key */
|
||||
UT_hash_handle hh; /* makes this structure hashable */
|
||||
} strpool;
|
||||
|
||||
void StrPoolDestroy(strpool **pp);
|
||||
bool StrPoolAddStr(strpool **pp,const char *s);
|
||||
bool StrPoolAddStrLen(strpool **pp,const char *s,size_t slen);
|
||||
bool StrPoolCheckStr(strpool *p,const char *s);
|
||||
|
||||
struct str_list {
|
||||
char *str;
|
||||
LIST_ENTRY(str_list) next;
|
||||
};
|
||||
LIST_HEAD(str_list_head, str_list);
|
||||
|
||||
|
||||
typedef struct hostfail_pool {
|
||||
char *str; /* key */
|
||||
int counter; /* value */
|
||||
time_t expire; /* when to expire record (unixtime) */
|
||||
UT_hash_handle hh; /* makes this structure hashable */
|
||||
} hostfail_pool;
|
||||
|
||||
void HostFailPoolDestroy(hostfail_pool **pp);
|
||||
hostfail_pool *HostFailPoolAdd(hostfail_pool **pp,const char *s,int fail_time);
|
||||
hostfail_pool *HostFailPoolFind(hostfail_pool *p,const char *s);
|
||||
void HostFailPoolDel(hostfail_pool **pp, hostfail_pool *elem);
|
||||
void HostFailPoolPurge(hostfail_pool **pp);
|
||||
void HostFailPoolPurgeRateLimited(hostfail_pool **pp);
|
||||
void HostFailPoolDump(hostfail_pool *p);
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename);
|
||||
void strlist_destroy(struct str_list_head *head);
|
||||
@ -21,29 +21,95 @@ bool IsHttp(const uint8_t *data, size_t len)
|
||||
}
|
||||
return false;
|
||||
}
|
||||
bool HttpExtractHost(const uint8_t *data, size_t len, char *host, size_t len_host)
|
||||
bool IsHttpReply(const uint8_t *data, size_t len)
|
||||
{
|
||||
const uint8_t *p, *s, *e=data+len;
|
||||
// HTTP/1.x 200\r\n
|
||||
return len>14 && !memcmp(data,"HTTP/1.",7) && (data[7]=='0' || data[7]=='1') && data[8]==' ' &&
|
||||
data[9]>='0' && data[9]<='9' &&
|
||||
data[10]>='0' && data[10]<='9' &&
|
||||
data[11]>='0' && data[11]<='9';
|
||||
}
|
||||
int HttpReplyCode(const uint8_t *data, size_t len)
|
||||
{
|
||||
return (data[9]-'0')*100 + (data[10]-'0')*10 + (data[11]-'0');
|
||||
}
|
||||
bool HttpExtractHeader(const uint8_t *data, size_t len, const char *header, char *buf, size_t len_buf)
|
||||
{
|
||||
const uint8_t *p, *s, *e = data + len;
|
||||
|
||||
p = (uint8_t*)strncasestr((char*)data, "\nHost:", len);
|
||||
p = (uint8_t*)strncasestr((char*)data, header, len);
|
||||
if (!p) return false;
|
||||
p+=6;
|
||||
while(p<e && (*p==' ' || *p=='\t')) p++;
|
||||
s=p;
|
||||
while(s<e && (*s!='\r' && *s!='\n' && *s!=' ' && *s!='\t')) s++;
|
||||
if (s>p)
|
||||
p += strlen(header);
|
||||
while (p < e && (*p == ' ' || *p == '\t')) p++;
|
||||
s = p;
|
||||
while (s < e && (*s != '\r' && *s != '\n' && *s != ' ' && *s != '\t')) s++;
|
||||
if (s > p)
|
||||
{
|
||||
size_t slen = s-p;
|
||||
if (host && len_host)
|
||||
size_t slen = s - p;
|
||||
if (buf && len_buf)
|
||||
{
|
||||
if (slen>=len_host) slen=len_host-1;
|
||||
for(size_t i=0;i<slen;i++) host[i]=tolower(p[i]);
|
||||
host[slen]=0;
|
||||
if (slen >= len_buf) slen = len_buf - 1;
|
||||
for (size_t i = 0; i < slen; i++) buf[i] = tolower(p[i]);
|
||||
buf[slen] = 0;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
bool HttpExtractHost(const uint8_t *data, size_t len, char *host, size_t len_host)
|
||||
{
|
||||
return HttpExtractHeader(data, len, "\nHost:", host, len_host);
|
||||
}
|
||||
const char *HttpFind2ndLevelDomain(const char *host)
|
||||
{
|
||||
const char *p=NULL;
|
||||
if (*host)
|
||||
{
|
||||
for (p = host + strlen(host)-1; p>host && *p!='.'; p--);
|
||||
if (*p=='.') for (p--; p>host && *p!='.'; p--);
|
||||
if (*p=='.') p++;
|
||||
}
|
||||
return p;
|
||||
}
|
||||
// DPI redirects are global redirects to another domain
|
||||
bool HttpReplyLooksLikeDPIRedirect(const uint8_t *data, size_t len, const char *host)
|
||||
{
|
||||
char loc[256],*redirect_host, *p;
|
||||
int code;
|
||||
|
||||
if (!host || !*host) return false;
|
||||
|
||||
code = HttpReplyCode(data,len);
|
||||
|
||||
if (code!=302 && code!=307 || !HttpExtractHeader(data,len,"\nLocation:",loc,sizeof(loc))) return false;
|
||||
|
||||
// something like : https://censor.net/badpage.php?reason=denied&source=RKN
|
||||
|
||||
if (!strncmp(loc,"http://",7))
|
||||
redirect_host=loc+7;
|
||||
else if (!strncmp(loc,"https://",8))
|
||||
redirect_host=loc+8;
|
||||
else
|
||||
return false;
|
||||
|
||||
// somethinkg like : censor.net/badpage.php?reason=denied&source=RKN
|
||||
|
||||
for(p=redirect_host; *p && *p!='/' ; p++);
|
||||
*p=0;
|
||||
if (!*redirect_host) return false;
|
||||
|
||||
// somethinkg like : censor.net
|
||||
|
||||
// extract 2nd level domains
|
||||
|
||||
const char *dhost = HttpFind2ndLevelDomain(host);
|
||||
const char *drhost = HttpFind2ndLevelDomain(redirect_host);
|
||||
|
||||
return strcasecmp(dhost, drhost)!=0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
bool IsTLSClientHello(const uint8_t *data, size_t len)
|
||||
{
|
||||
return len>=6 && data[0]==0x16 && data[1]==0x03 && data[2]>=0x01 && data[2]<=0x03 && data[5]==0x01 && (pntoh16(data+3)+5)<=len;
|
||||
|
||||
@ -5,7 +5,16 @@
|
||||
#include <stdbool.h>
|
||||
|
||||
bool IsHttp(const uint8_t *data, size_t len);
|
||||
// header must be passed like this : "\nHost:"
|
||||
bool HttpExtractHeader(const uint8_t *data, size_t len, const char *header, char *buf, size_t len_buf);
|
||||
bool HttpExtractHost(const uint8_t *data, size_t len, char *host, size_t len_host);
|
||||
bool IsHttpReply(const uint8_t *data, size_t len);
|
||||
const char *HttpFind2ndLevelDomain(const char *host);
|
||||
// must be pre-checked by IsHttpReply
|
||||
int HttpReplyCode(const uint8_t *data, size_t len);
|
||||
// must be pre-checked by IsHttpReply
|
||||
bool HttpReplyLooksLikeDPIRedirect(const uint8_t *data, size_t len, const char *host);
|
||||
|
||||
bool IsTLSClientHello(const uint8_t *data, size_t len);
|
||||
bool TLSFindExt(const uint8_t *data, size_t len, uint16_t type, const uint8_t **ext, size_t *len_ext);
|
||||
bool TLSHelloExtractHost(const uint8_t *data, size_t len, char *host, size_t len_host);
|
||||
|
||||
107
tpws/strpool.c
107
tpws/strpool.c
@ -1,107 +0,0 @@
|
||||
#define _GNU_SOURCE
|
||||
#include "strpool.h"
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#undef uthash_nonfatal_oom
|
||||
#define uthash_nonfatal_oom(elt) ut_oom_recover(elt)
|
||||
|
||||
static bool oom = false;
|
||||
static void ut_oom_recover(strpool *elem)
|
||||
{
|
||||
oom = true;
|
||||
}
|
||||
|
||||
// for zero terminated strings
|
||||
bool StrPoolAddStr(strpool **pp, const char *s)
|
||||
{
|
||||
strpool *elem;
|
||||
if (!(elem = (strpool*)malloc(sizeof(strpool))))
|
||||
return false;
|
||||
if (!(elem->str = strdup(s)))
|
||||
{
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
oom = false;
|
||||
HASH_ADD_KEYPTR(hh, *pp, elem->str, strlen(elem->str), elem);
|
||||
if (oom)
|
||||
{
|
||||
free(elem->str);
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
// for not zero terminated strings
|
||||
bool StrPoolAddStrLen(strpool **pp, const char *s, size_t slen)
|
||||
{
|
||||
strpool *elem;
|
||||
if (!(elem = (strpool*)malloc(sizeof(strpool))))
|
||||
return false;
|
||||
if (!(elem->str = malloc(slen + 1)))
|
||||
{
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
memcpy(elem->str, s, slen);
|
||||
elem->str[slen] = 0;
|
||||
oom = false;
|
||||
HASH_ADD_KEYPTR(hh, *pp, elem->str, strlen(elem->str), elem);
|
||||
if (oom)
|
||||
{
|
||||
free(elem->str);
|
||||
free(elem);
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool StrPoolCheckStr(strpool *p, const char *s)
|
||||
{
|
||||
strpool *elem;
|
||||
HASH_FIND_STR(p, s, elem);
|
||||
return elem != NULL;
|
||||
}
|
||||
|
||||
void StrPoolDestroy(strpool **p)
|
||||
{
|
||||
strpool *elem, *tmp;
|
||||
HASH_ITER(hh, *p, elem, tmp) {
|
||||
free(elem->str);
|
||||
HASH_DEL(*p, elem);
|
||||
free(elem);
|
||||
}
|
||||
*p = NULL;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename)
|
||||
{
|
||||
struct str_list *entry = malloc(sizeof(struct str_list));
|
||||
if (!entry) return false;
|
||||
entry->str = strdup(filename);
|
||||
if (!entry->str)
|
||||
{
|
||||
free(entry);
|
||||
return false;
|
||||
}
|
||||
LIST_INSERT_HEAD(head, entry, next);
|
||||
return true;
|
||||
}
|
||||
static void strlist_entry_destroy(struct str_list *entry)
|
||||
{
|
||||
if (entry->str) free(entry->str);
|
||||
free(entry);
|
||||
}
|
||||
void strlist_destroy(struct str_list_head *head)
|
||||
{
|
||||
struct str_list *entry;
|
||||
while ((entry = LIST_FIRST(head)))
|
||||
{
|
||||
LIST_REMOVE(entry, next);
|
||||
strlist_entry_destroy(entry);
|
||||
}
|
||||
}
|
||||
@ -1,29 +0,0 @@
|
||||
#pragma once
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <ctype.h>
|
||||
#include <sys/queue.h>
|
||||
|
||||
//#define HASH_BLOOM 20
|
||||
#define HASH_NONFATAL_OOM 1
|
||||
#define HASH_FUNCTION HASH_BER
|
||||
#include "uthash.h"
|
||||
|
||||
typedef struct strpool {
|
||||
char *str; /* key */
|
||||
UT_hash_handle hh; /* makes this structure hashable */
|
||||
} strpool;
|
||||
|
||||
void StrPoolDestroy(strpool **p);
|
||||
bool StrPoolAddStr(strpool **pp,const char *s);
|
||||
bool StrPoolAddStrLen(strpool **pp,const char *s,size_t slen);
|
||||
bool StrPoolCheckStr(strpool *p,const char *s);
|
||||
|
||||
struct str_list {
|
||||
char *str;
|
||||
LIST_ENTRY(str_list) next;
|
||||
};
|
||||
LIST_HEAD(str_list_head, str_list);
|
||||
|
||||
bool strlist_add(struct str_list_head *head, const char *filename);
|
||||
void strlist_destroy(struct str_list_head *head);
|
||||
197
tpws/tamper.c
197
tpws/tamper.c
@ -25,15 +25,17 @@ bool find_host(uint8_t **pHost,uint8_t *buf,size_t bs)
|
||||
|
||||
static const char *http_methods[] = { "GET /","POST /","HEAD /","OPTIONS /","PUT /","DELETE /","CONNECT /","TRACE /",NULL };
|
||||
// segment buffer has at least 5 extra bytes to extend data block
|
||||
void modify_tcp_segment(uint8_t *segment,size_t segment_buffer_size,size_t *size,size_t *split_pos)
|
||||
void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,size_t *size, size_t *split_pos)
|
||||
{
|
||||
uint8_t *p, *pp, *pHost = NULL;
|
||||
size_t method_len = 0, pos;
|
||||
const char **method;
|
||||
bool bIsHttp = false, bBypass = false;
|
||||
bool bIsHttp = false, bBypass = false, bHaveHost = false, bHostExcluded = false;
|
||||
char bRemovedHostSpace = 0;
|
||||
char *pc, Host[128];
|
||||
char *pc, Host[256];
|
||||
|
||||
DBGPRINT("tamper_out")
|
||||
|
||||
*split_pos=0;
|
||||
|
||||
for (method = http_methods; *method; method++)
|
||||
@ -49,6 +51,7 @@ void modify_tcp_segment(uint8_t *segment,size_t segment_buffer_size,size_t *size
|
||||
if (bIsHttp)
|
||||
{
|
||||
VPRINT("Data block looks like http request start : %s", *method)
|
||||
if (!ctrack->l7proto) ctrack->l7proto=HTTP;
|
||||
// cpu saving : we search host only if and when required. we do not research host every time we need its position
|
||||
if ((params.hostlist || params.hostlist_exclude) && find_host(&pHost,segment,*size))
|
||||
{
|
||||
@ -58,9 +61,10 @@ void modify_tcp_segment(uint8_t *segment,size_t segment_buffer_size,size_t *size
|
||||
while (pp < (segment + *size) && (pp - p) < (sizeof(Host) - 1) && *pp != '\r' && *pp != '\n') pp++;
|
||||
memcpy(Host, p, pp - p);
|
||||
Host[pp - p] = '\0';
|
||||
bHaveHost = true;
|
||||
VPRINT("Requested Host is : %s", Host)
|
||||
for(pc = Host; *pc; pc++) *pc=tolower(*pc);
|
||||
bBypass = !HostlistCheck(params.hostlist, params.hostlist_exclude, Host);
|
||||
bBypass = !HostlistCheck(params.hostlist, params.hostlist_exclude, Host, &bHostExcluded);
|
||||
}
|
||||
if (!bBypass)
|
||||
{
|
||||
@ -210,62 +214,161 @@ void modify_tcp_segment(uint8_t *segment,size_t segment_buffer_size,size_t *size
|
||||
{
|
||||
VPRINT("Not acting on this request")
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
if (IsTLSClientHello(segment,*size))
|
||||
else if (IsTLSClientHello(segment,*size))
|
||||
{
|
||||
char host[256];
|
||||
size_t tpos=0,elen;
|
||||
const uint8_t *ext;
|
||||
|
||||
if (!ctrack->l7proto) ctrack->l7proto=TLS;
|
||||
|
||||
VPRINT("packet contains TLS ClientHello")
|
||||
// we need host only if hostlist is present
|
||||
if ((params.hostlist || params.hostlist_exclude) && TLSHelloExtractHost((uint8_t*)segment,*size,host,sizeof(host)))
|
||||
if ((params.hostlist || params.hostlist_exclude) && TLSHelloExtractHost((uint8_t*)segment,*size,Host,sizeof(Host)))
|
||||
{
|
||||
VPRINT("hostname: %s",host)
|
||||
if (!HostlistCheck(params.hostlist, params.hostlist_exclude, host))
|
||||
VPRINT("hostname: %s",Host)
|
||||
bHaveHost = true;
|
||||
bBypass = !HostlistCheck(params.hostlist, params.hostlist_exclude, Host, &bHostExcluded);
|
||||
}
|
||||
if (bBypass)
|
||||
{
|
||||
VPRINT("Not acting on this request")
|
||||
}
|
||||
else
|
||||
{
|
||||
switch(params.tlsrec)
|
||||
{
|
||||
VPRINT("Not acting on this request")
|
||||
return;
|
||||
case tlsrec_sni:
|
||||
if (TLSFindExt(segment,*size,0,&ext,&elen))
|
||||
tpos = ext-segment+1; // between typical 1st and 2nd char of hostname
|
||||
break;
|
||||
case tlsrec_pos:
|
||||
tpos = params.tlsrec_pos;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
switch(params.tlsrec)
|
||||
{
|
||||
case tlsrec_sni:
|
||||
if (TLSFindExt(segment,*size,0,&ext,&elen))
|
||||
tpos = ext-segment+1; // between typical 1st and 2nd char of hostname
|
||||
break;
|
||||
case tlsrec_pos:
|
||||
tpos = params.tlsrec_pos;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
if (tpos)
|
||||
{
|
||||
// construct 2 TLS records from one
|
||||
uint16_t l = pntoh16(segment+3); // length
|
||||
if (l>=2)
|
||||
if (tpos)
|
||||
{
|
||||
// length is checked in IsTLSClientHello and cannot exceed buffer size
|
||||
if (tpos>=l) tpos=1;
|
||||
VPRINT("making 2 TLS records at pos %zu",tpos)
|
||||
memmove(segment+5+tpos+5,segment+5+tpos,*size-(5+tpos));
|
||||
segment[5+tpos] = segment[0];
|
||||
segment[5+tpos+1] = segment[1];
|
||||
segment[5+tpos+2] = segment[2];
|
||||
phton16(segment+5+tpos+3,l-tpos);
|
||||
phton16(segment+3,tpos);
|
||||
*size += 5;
|
||||
// construct 2 TLS records from one
|
||||
uint16_t l = pntoh16(segment+3); // length
|
||||
if (l>=2)
|
||||
{
|
||||
// length is checked in IsTLSClientHello and cannot exceed buffer size
|
||||
if (tpos>=l) tpos=1;
|
||||
VPRINT("making 2 TLS records at pos %zu",tpos)
|
||||
memmove(segment+5+tpos+5,segment+5+tpos,*size-(5+tpos));
|
||||
segment[5+tpos] = segment[0];
|
||||
segment[5+tpos+1] = segment[1];
|
||||
segment[5+tpos+2] = segment[2];
|
||||
phton16(segment+5+tpos+3,l-tpos);
|
||||
phton16(segment+3,tpos);
|
||||
*size += 5;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (params.split_pos < *size)
|
||||
*split_pos = params.split_pos;
|
||||
return;
|
||||
if (params.split_pos < *size)
|
||||
*split_pos = params.split_pos;
|
||||
}
|
||||
}
|
||||
|
||||
if (params.split_any_protocol && params.split_pos < *size)
|
||||
else if (params.split_any_protocol && params.split_pos < *size)
|
||||
*split_pos = params.split_pos;
|
||||
|
||||
if (bHaveHost && bBypass && !bHostExcluded && !ctrack->hostname && *params.hostlist_auto_filename)
|
||||
{
|
||||
DBGPRINT("tamper_out put hostname : %s", Host)
|
||||
ctrack->hostname=strdup(Host);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
static void auto_hostlist_failed(const char *hostname)
|
||||
{
|
||||
hostfail_pool *fail_counter;
|
||||
|
||||
fail_counter = HostFailPoolFind(params.hostlist_auto_fail_counters, hostname);
|
||||
if (!fail_counter)
|
||||
{
|
||||
fail_counter = HostFailPoolAdd(¶ms.hostlist_auto_fail_counters, hostname, params.hostlist_auto_fail_time);
|
||||
if (!fail_counter)
|
||||
{
|
||||
fprintf(stderr, "HostFailPoolAdd: out of memory\n");
|
||||
return;
|
||||
}
|
||||
}
|
||||
fail_counter->counter++;
|
||||
VPRINT("auto hostlist : %s : fail counter %d/%d", hostname, fail_counter->counter, params.hostlist_auto_fail_threshold);
|
||||
if (fail_counter->counter >= params.hostlist_auto_fail_threshold)
|
||||
{
|
||||
VPRINT("auto hostlist : fail threshold reached. adding %s to auto hostlist", hostname);
|
||||
HostFailPoolDel(¶ms.hostlist_auto_fail_counters, fail_counter);
|
||||
if (!StrPoolAddStr(¶ms.hostlist, hostname))
|
||||
{
|
||||
fprintf(stderr, "StrPoolAddStr out of memory\n");
|
||||
return;
|
||||
}
|
||||
if (!append_to_list_file(params.hostlist_auto_filename, hostname))
|
||||
{
|
||||
perror("write to auto hostlist:");
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void tamper_in(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,size_t *size)
|
||||
{
|
||||
bool bFail=false;
|
||||
|
||||
DBGPRINT("tamper_in hostname=%s", ctrack->hostname)
|
||||
|
||||
HostFailPoolPurgeRateLimited(¶ms.hostlist_auto_fail_counters);
|
||||
|
||||
if (ctrack->l7proto==HTTP && ctrack->hostname)
|
||||
{
|
||||
if (IsHttpReply(segment,*size))
|
||||
{
|
||||
VPRINT("incoming HTTP reply detected for hostname %s", ctrack->hostname);
|
||||
bFail = HttpReplyLooksLikeDPIRedirect(segment, *size, ctrack->hostname);
|
||||
if (bFail)
|
||||
VPRINT("redirect to another domain detected. possibly DPI redirect.")
|
||||
else
|
||||
VPRINT("local or in-domain redirect detected. it's not a DPI redirect.")
|
||||
}
|
||||
else
|
||||
{
|
||||
// received not http reply. do not monitor this connection anymore
|
||||
VPRINT("incoming unknown HTTP data detected for hostname %s", ctrack->hostname);
|
||||
}
|
||||
if (bFail)
|
||||
auto_hostlist_failed(ctrack->hostname);
|
||||
|
||||
}
|
||||
ctrack->bTamperInCutoff = true;
|
||||
}
|
||||
|
||||
void rst_in(t_ctrack *ctrack)
|
||||
{
|
||||
DBGPRINT("rst_in hostname=%s", ctrack->hostname)
|
||||
|
||||
HostFailPoolPurgeRateLimited(¶ms.hostlist_auto_fail_counters);
|
||||
|
||||
if (!ctrack->bTamperInCutoff && ctrack->hostname)
|
||||
{
|
||||
VPRINT("incoming RST detected for hostname %s", ctrack->hostname);
|
||||
auto_hostlist_failed(ctrack->hostname);
|
||||
}
|
||||
}
|
||||
void hup_out(t_ctrack *ctrack)
|
||||
{
|
||||
DBGPRINT("hup_out hostname=%s", ctrack->hostname)
|
||||
|
||||
HostFailPoolPurgeRateLimited(¶ms.hostlist_auto_fail_counters);
|
||||
|
||||
if (!ctrack->bTamperInCutoff && ctrack->hostname)
|
||||
{
|
||||
// local leg dropped connection after first request. probably due to timeout.
|
||||
VPRINT("local leg closed connection after first request (timeout ?). hostname: %s", ctrack->hostname);
|
||||
auto_hostlist_failed(ctrack->hostname);
|
||||
}
|
||||
}
|
||||
|
||||
@ -4,5 +4,19 @@
|
||||
#include <stdint.h>
|
||||
#include <sys/types.h>
|
||||
|
||||
bool find_host(uint8_t **pHost,uint8_t *buf,size_t bs);
|
||||
void modify_tcp_segment(uint8_t *segment,size_t segment_buffer_size,size_t *size,size_t *split_pos);
|
||||
typedef enum {UNKNOWN=0, HTTP, TLS} t_l7proto;
|
||||
typedef struct
|
||||
{
|
||||
// common state
|
||||
t_l7proto l7proto;
|
||||
bool bFirstReplyChecked;
|
||||
bool bTamperInCutoff;
|
||||
char *hostname;
|
||||
} t_ctrack;
|
||||
|
||||
void tamper_out(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,size_t *size, size_t *split_pos);
|
||||
void tamper_in(t_ctrack *ctrack, uint8_t *segment,size_t segment_buffer_size,size_t *size);
|
||||
// connection reset by remote leg
|
||||
void rst_in(t_ctrack *ctrack);
|
||||
// local leg closed connection (timeout waiting response ?)
|
||||
void hup_out(t_ctrack *ctrack);
|
||||
|
||||
205
tpws/tpws.c
205
tpws/tpws.c
@ -36,6 +36,8 @@
|
||||
#include "sec.h"
|
||||
#include "redirect.h"
|
||||
#include "helpers.h"
|
||||
#include "gzip.h"
|
||||
#include "pools.h"
|
||||
|
||||
struct params_s params;
|
||||
|
||||
@ -62,6 +64,12 @@ void dohup(void)
|
||||
}
|
||||
}
|
||||
|
||||
static void onusr2(int sig)
|
||||
{
|
||||
printf("\nHOSTFAIL POOL DUMP\n");
|
||||
HostFailPoolDump(params.hostlist_auto_fail_counters);
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
|
||||
static int8_t block_sigpipe(void)
|
||||
@ -120,62 +128,66 @@ static int get_default_ttl(void)
|
||||
static void exithelp(void)
|
||||
{
|
||||
printf(
|
||||
" --bind-addr=<v4_addr>|<v6_addr>; for v6 link locals append %%interface_name\n"
|
||||
" --bind-iface4=<interface_name>\t; bind to the first ipv4 addr of interface\n"
|
||||
" --bind-iface6=<interface_name>\t; bind to the first ipv6 addr of interface\n"
|
||||
" --bind-linklocal=no|unwanted|prefer|force\n"
|
||||
"\t\t\t\t; prohibit, accept, prefer or force ipv6 link local bind\n"
|
||||
" --bind-wait-ifup=<sec>\t\t; wait for interface to appear and up\n"
|
||||
" --bind-wait-ip=<sec>\t\t; after ifup wait for ip address to appear up to N seconds\n"
|
||||
" --bind-wait-ip-linklocal=<sec>\t; (prefer) accept only LL first N seconds then any (unwanted) accept only globals first N seconds then LL\n"
|
||||
" --bind-wait-only\t\t; wait for bind conditions satisfaction then exit. return code 0 if success.\n"
|
||||
" --bind-addr=<v4_addr>|<v6_addr>\t; for v6 link locals append %%interface_name\n"
|
||||
" --bind-iface4=<interface_name>\t\t; bind to the first ipv4 addr of interface\n"
|
||||
" --bind-iface6=<interface_name>\t\t; bind to the first ipv6 addr of interface\n"
|
||||
" --bind-linklocal=no|unwanted|prefer|force ; prohibit, accept, prefer or force ipv6 link local bind\n"
|
||||
" --bind-wait-ifup=<sec>\t\t\t; wait for interface to appear and up\n"
|
||||
" --bind-wait-ip=<sec>\t\t\t; after ifup wait for ip address to appear up to N seconds\n"
|
||||
" --bind-wait-ip-linklocal=<sec>\t\t; (prefer) accept only LL first N seconds then any (unwanted) accept only globals first N seconds then LL\n"
|
||||
" --bind-wait-only\t\t\t; wait for bind conditions satisfaction then exit. return code 0 if success.\n"
|
||||
" * multiple binds are supported. each bind-addr, bind-iface* start new bind\n"
|
||||
" --port=<port>\t\t\t; only one port number for all binds is supported\n"
|
||||
" --socks\t\t\t; implement socks4/5 proxy instead of transparent proxy\n"
|
||||
" --no-resolve\t\t\t; disable socks5 remote dns ability (resolves are not async, they block all activity)\n"
|
||||
" --port=<port>\t\t\t\t; only one port number for all binds is supported\n"
|
||||
" --socks\t\t\t\t; implement socks4/5 proxy instead of transparent proxy\n"
|
||||
" --no-resolve\t\t\t\t; disable socks5 remote dns ability (resolves are not async, they block all activity)\n"
|
||||
" --local-rcvbuf=<bytes>\n"
|
||||
" --local-sndbuf=<bytes>\n"
|
||||
" --remote-rcvbuf=<bytes>\n"
|
||||
" --remote-sndbuf=<bytes>\n"
|
||||
" --skip-nodelay\t\t\t; do not set TCP_NODELAY option for outgoing connections (incompatible with split options)\n"
|
||||
" --skip-nodelay\t\t\t\t; do not set TCP_NODELAY option for outgoing connections (incompatible with split options)\n"
|
||||
" --maxconn=<max_connections>\n"
|
||||
#ifdef SPLICE_PRESENT
|
||||
" --maxfiles=<max_open_files>\t; should be at least (X*connections+16), where X=6 in tcp proxy mode, X=4 in tampering mode\n"
|
||||
" --maxfiles=<max_open_files>\t\t; should be at least (X*connections+16), where X=6 in tcp proxy mode, X=4 in tampering mode\n"
|
||||
#else
|
||||
" --maxfiles=<max_open_files>\t; should be at least (connections*2+16)\n"
|
||||
" --maxfiles=<max_open_files>\t\t; should be at least (connections*2+16)\n"
|
||||
#endif
|
||||
" --max-orphan-time=<sec>\t; if local leg sends something and closes and remote leg is still connecting then cancel connection attempt after N seconds\n"
|
||||
" --daemon\t\t\t; daemonize\n"
|
||||
" --pidfile=<filename>\t\t; write pid to file\n"
|
||||
" --user=<username>\t\t; drop root privs\n"
|
||||
" --uid=uid[:gid]\t\t; drop root privs\n"
|
||||
" --max-orphan-time=<sec>\t\t; if local leg sends something and closes and remote leg is still connecting then cancel connection attempt after N seconds\n"
|
||||
" --daemon\t\t\t\t; daemonize\n"
|
||||
" --pidfile=<filename>\t\t\t; write pid to file\n"
|
||||
" --user=<username>\t\t\t; drop root privs\n"
|
||||
" --uid=uid[:gid]\t\t\t; drop root privs\n"
|
||||
#if defined(BSD) && !defined(__OpenBSD__) && !defined(__APPLE__)
|
||||
" --enable-pf\t\t\t; enable PF redirector support. required in FreeBSD when used with PF firewall.\n"
|
||||
" --enable-pf\t\t\t\t; enable PF redirector support. required in FreeBSD when used with PF firewall.\n"
|
||||
#endif
|
||||
" --debug=0|1|2\t\t\t; 0(default)=silent 1=verbose 2=debug\n"
|
||||
"\nTAMPERING:\n"
|
||||
" --hostlist=<filename>\t\t; only act on hosts in the list (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
|
||||
" --hostlist-exclude=<filename>\t; do not act on hosts in the list (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
|
||||
" --split-http-req=method|host\t; split at specified logical part of plain http request\n"
|
||||
" --split-pos=<numeric_offset>\t; split at specified pos. split-http-req takes precedence for http.\n"
|
||||
" --split-any-protocol\t\t; split not only http and https\n"
|
||||
" --debug=0|1|2\t\t\t\t; 0(default)=silent 1=verbose 2=debug\n"
|
||||
"\nFILTER:\n"
|
||||
" --hostlist=<filename>\t\t\t; only act on hosts in the list (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
|
||||
" --hostlist-exclude=<filename>\t\t; do not act on hosts in the list (one host per line, subdomains auto apply, gzip supported, multiple hostlists allowed)\n"
|
||||
" --hostlist-auto=<filename>\t\t; detect DPI blocks and build hostlist automatically\n"
|
||||
" --hostlist-auto-fail-threshold=<int>\t; how many failed attempts cause hostname to be added to auto hostlist (default : %d)\n"
|
||||
" --hostlist-auto-fail-time=<int>\t; all failed attemps must be within these seconds (default : %d)\n"
|
||||
"\nTAMPER:\n"
|
||||
" --split-http-req=method|host\t\t; split at specified logical part of plain http request\n"
|
||||
" --split-pos=<numeric_offset>\t\t; split at specified pos. split-http-req takes precedence for http.\n"
|
||||
" --split-any-protocol\t\t\t; split not only http and https\n"
|
||||
#if defined(BSD) && !defined(__APPLE__)
|
||||
" --disorder\t\t\t; when splitting simulate sending second fragment first (BSD sends entire message instead of first fragment, this is not good)\n"
|
||||
" --disorder\t\t\t\t; when splitting simulate sending second fragment first (BSD sends entire message instead of first fragment, this is not good)\n"
|
||||
#else
|
||||
" --disorder\t\t\t; when splitting simulate sending second fragment first\n"
|
||||
" --disorder\t\t\t\t; when splitting simulate sending second fragment first\n"
|
||||
#endif
|
||||
" --hostcase\t\t\t; change Host: => host:\n"
|
||||
" --hostspell\t\t\t; exact spelling of \"Host\" header. must be 4 chars. default is \"host\"\n"
|
||||
" --hostdot\t\t\t; add \".\" after Host: name\n"
|
||||
" --hosttab\t\t\t; add tab after Host: name\n"
|
||||
" --hostnospace\t\t\t; remove space after Host:\n"
|
||||
" --hostpad=<bytes>\t\t; add dummy padding headers before Host:\n"
|
||||
" --domcase\t\t\t; mix domain case : Host: TeSt.cOm\n"
|
||||
" --methodspace\t\t\t; add extra space after method\n"
|
||||
" --methodeol\t\t\t; add end-of-line before method\n"
|
||||
" --unixeol\t\t\t; replace 0D0A to 0A\n"
|
||||
" --tlsrec=sni\t\t\t; make 2 TLS records. split at SNI. don't split if SNI is not present\n"
|
||||
" --tlsrec-pos=<pos>\t\t; make 2 TLS records. split at specified pos\n"
|
||||
" --hostcase\t\t\t\t; change Host: => host:\n"
|
||||
" --hostspell\t\t\t\t; exact spelling of \"Host\" header. must be 4 chars. default is \"host\"\n"
|
||||
" --hostdot\t\t\t\t; add \".\" after Host: name\n"
|
||||
" --hosttab\t\t\t\t; add tab after Host: name\n"
|
||||
" --hostnospace\t\t\t\t; remove space after Host:\n"
|
||||
" --hostpad=<bytes>\t\t\t; add dummy padding headers before Host:\n"
|
||||
" --domcase\t\t\t\t; mix domain case : Host: TeSt.cOm\n"
|
||||
" --methodspace\t\t\t\t; add extra space after method\n"
|
||||
" --methodeol\t\t\t\t; add end-of-line before method\n"
|
||||
" --unixeol\t\t\t\t; replace 0D0A to 0A\n"
|
||||
" --tlsrec=sni\t\t\t\t; make 2 TLS records. split at SNI. don't split if SNI is not present\n"
|
||||
" --tlsrec-pos=<pos>\t\t\t; make 2 TLS records. split at specified pos\n",
|
||||
HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT, HOSTLIST_AUTO_FAIL_TIME_DEFAULT
|
||||
);
|
||||
exit(1);
|
||||
}
|
||||
@ -183,16 +195,9 @@ static void cleanup_params(void)
|
||||
{
|
||||
strlist_destroy(¶ms.hostlist_files);
|
||||
strlist_destroy(¶ms.hostlist_exclude_files);
|
||||
if (params.hostlist_exclude)
|
||||
{
|
||||
StrPoolDestroy(¶ms.hostlist_exclude);
|
||||
params.hostlist_exclude = NULL;
|
||||
}
|
||||
if (params.hostlist)
|
||||
{
|
||||
StrPoolDestroy(¶ms.hostlist);
|
||||
params.hostlist = NULL;
|
||||
}
|
||||
StrPoolDestroy(¶ms.hostlist_exclude);
|
||||
StrPoolDestroy(¶ms.hostlist);
|
||||
HostFailPoolDestroy(¶ms.hostlist_auto_fail_counters);
|
||||
}
|
||||
static void exithelp_clean(void)
|
||||
{
|
||||
@ -246,6 +251,8 @@ void parse_params(int argc, char *argv[])
|
||||
params.maxconn = DEFAULT_MAX_CONN;
|
||||
params.max_orphan_time = DEFAULT_MAX_ORPHAN_TIME;
|
||||
params.binds_last = -1;
|
||||
params.hostlist_auto_fail_threshold = HOSTLIST_AUTO_FAIL_THRESHOLD_DEFAULT;
|
||||
params.hostlist_auto_fail_time = HOSTLIST_AUTO_FAIL_TIME_DEFAULT;
|
||||
LIST_INIT(¶ms.hostlist_files);
|
||||
LIST_INIT(¶ms.hostlist_exclude_files);
|
||||
|
||||
@ -294,18 +301,22 @@ void parse_params(int argc, char *argv[])
|
||||
{ "tlsrec-pos",required_argument,0,0 },// optidx=32
|
||||
{ "hostlist",required_argument,0,0 },// optidx=33
|
||||
{ "hostlist-exclude",required_argument,0,0 },// optidx=34
|
||||
{ "pidfile",required_argument,0,0 },// optidx=35
|
||||
{ "debug",optional_argument,0,0 },// optidx=36
|
||||
{ "local-rcvbuf",required_argument,0,0 },// optidx=37
|
||||
{ "local-sndbuf",required_argument,0,0 },// optidx=38
|
||||
{ "remote-rcvbuf",required_argument,0,0 },// optidx=39
|
||||
{ "remote-sndbuf",required_argument,0,0 },// optidx=40
|
||||
{ "socks",no_argument,0,0 },// optidx=41
|
||||
{ "no-resolve",no_argument,0,0 },// optidx=42
|
||||
{ "skip-nodelay",no_argument,0,0 },// optidx=43
|
||||
{ "hostlist-auto",required_argument,0,0}, // optidx=35
|
||||
{ "hostlist-auto-fail-threshold",required_argument,0,0}, // optidx=36
|
||||
{ "hostlist-auto-fail-time",required_argument,0,0}, // optidx=37
|
||||
{ "pidfile",required_argument,0,0 },// optidx=38
|
||||
{ "debug",optional_argument,0,0 },// optidx=39
|
||||
{ "local-rcvbuf",required_argument,0,0 },// optidx=40
|
||||
{ "local-sndbuf",required_argument,0,0 },// optidx=41
|
||||
{ "remote-rcvbuf",required_argument,0,0 },// optidx=42
|
||||
{ "remote-sndbuf",required_argument,0,0 },// optidx=43
|
||||
{ "socks",no_argument,0,0 },// optidx=44
|
||||
{ "no-resolve",no_argument,0,0 },// optidx=45
|
||||
{ "skip-nodelay",no_argument,0,0 },// optidx=46
|
||||
#if defined(BSD) && !defined(__OpenBSD__) && !defined(__APPLE__)
|
||||
{ "enable-pf",no_argument,0,0 },// optidx=44
|
||||
{ "enable-pf",no_argument,0,0 },// optidx=47
|
||||
#endif
|
||||
{ "hostlist-auto-retrans-threshold",optional_argument,0,0}, // ignored. for nfqws command line compatibility
|
||||
{ NULL,0,NULL,0 }
|
||||
};
|
||||
while ((v = getopt_long_only(argc, argv, "", long_options, &option_index)) != -1)
|
||||
@ -544,36 +555,84 @@ void parse_params(int argc, char *argv[])
|
||||
}
|
||||
params.tamper = true;
|
||||
break;
|
||||
case 35: /* pidfile */
|
||||
case 35: /* hostlist-auto */
|
||||
if (*params.hostlist_auto_filename)
|
||||
{
|
||||
fprintf(stderr, "only one auto hostlist is supported\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
{
|
||||
FILE *F = fopen(optarg,"a+t");
|
||||
if (!F)
|
||||
{
|
||||
fprintf(stderr, "cannot create %s\n", optarg);
|
||||
exit_clean(1);
|
||||
}
|
||||
bool bGzip = is_gzip(F);
|
||||
fclose(F);
|
||||
if (bGzip)
|
||||
{
|
||||
fprintf(stderr, "gzipped auto hostlists are not supported\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
if (params.droproot && chown(optarg, params.uid, -1))
|
||||
fprintf(stderr, "could not chown %s. auto hostlist file may not be writable after privilege drop\n", optarg);
|
||||
}
|
||||
if (!strlist_add(¶ms.hostlist_files, optarg))
|
||||
{
|
||||
fprintf(stderr, "strlist_add failed\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
strncpy(params.hostlist_auto_filename, optarg, sizeof(params.hostlist_auto_filename));
|
||||
params.hostlist_auto_filename[sizeof(params.hostlist_auto_filename) - 1] = '\0';
|
||||
params.tamper = true; // need to detect blocks and update autohostlist. cannot just slice.
|
||||
break;
|
||||
case 36: /* hostlist-auto-fail-threshold */
|
||||
params.hostlist_auto_fail_threshold = (uint8_t)atoi(optarg);
|
||||
if (params.hostlist_auto_fail_threshold<1 || params.hostlist_auto_fail_threshold>20)
|
||||
{
|
||||
fprintf(stderr, "auto hostlist fail threshold must be within 1..20\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 37: /* hostlist-auto-fail-time */
|
||||
params.hostlist_auto_fail_time = (uint8_t)atoi(optarg);
|
||||
if (params.hostlist_auto_fail_time<1)
|
||||
{
|
||||
fprintf(stderr, "auto hostlist fail time is not valid\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 38: /* pidfile */
|
||||
strncpy(params.pidfile,optarg,sizeof(params.pidfile));
|
||||
params.pidfile[sizeof(params.pidfile)-1]='\0';
|
||||
break;
|
||||
case 36:
|
||||
case 39:
|
||||
params.debug = optarg ? atoi(optarg) : 1;
|
||||
break;
|
||||
case 37: /* local-rcvbuf */
|
||||
case 40: /* local-rcvbuf */
|
||||
params.local_rcvbuf = atoi(optarg)/2;
|
||||
break;
|
||||
case 38: /* local-sndbuf */
|
||||
case 41: /* local-sndbuf */
|
||||
params.local_sndbuf = atoi(optarg)/2;
|
||||
break;
|
||||
case 39: /* remote-rcvbuf */
|
||||
case 42: /* remote-rcvbuf */
|
||||
params.remote_rcvbuf = atoi(optarg)/2;
|
||||
break;
|
||||
case 40: /* remote-sndbuf */
|
||||
case 43: /* remote-sndbuf */
|
||||
params.remote_sndbuf = atoi(optarg)/2;
|
||||
break;
|
||||
case 41: /* socks */
|
||||
case 44: /* socks */
|
||||
params.proxy_type = CONN_TYPE_SOCKS;
|
||||
break;
|
||||
case 42: /* no-resolve */
|
||||
case 45: /* no-resolve */
|
||||
params.no_resolve = true;
|
||||
break;
|
||||
case 43: /* skip-nodelay */
|
||||
case 46: /* skip-nodelay */
|
||||
params.skip_nodelay = true;
|
||||
break;
|
||||
#if defined(BSD) && !defined(__OpenBSD__) && !defined(__APPLE__)
|
||||
case 44: /* enable-pf */
|
||||
case 47: /* enable-pf */
|
||||
params.pf_enable = true;
|
||||
break;
|
||||
#endif
|
||||
@ -599,6 +658,7 @@ void parse_params(int argc, char *argv[])
|
||||
fprintf(stderr, "Include hostlist load failed\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
if (*params.hostlist_auto_filename) NonEmptyHostlist(¶ms.hostlist);
|
||||
if (!LoadHostLists(¶ms.hostlist_exclude, ¶ms.hostlist_exclude_files))
|
||||
{
|
||||
fprintf(stderr, "Exclude hostlist load failed\n");
|
||||
@ -1020,6 +1080,7 @@ int main(int argc, char *argv[])
|
||||
if (!params.tamper) printf("TCP proxy mode (no tampering)\n");
|
||||
|
||||
signal(SIGHUP, onhup);
|
||||
signal(SIGUSR2, onusr2);
|
||||
|
||||
retval = event_loop(listen_fd,params.binds_last+1);
|
||||
exit_v = retval < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
|
||||
|
||||
@ -24,6 +24,7 @@
|
||||
#include "socks.h"
|
||||
#include "helpers.h"
|
||||
|
||||
|
||||
// keep separate legs counter. counting every time thousands of legs can consume cpu
|
||||
static int legs_local, legs_remote;
|
||||
/*
|
||||
@ -376,6 +377,7 @@ static void free_conn(tproxy_conn_t *conn)
|
||||
}
|
||||
conn_free_buffers(conn);
|
||||
if (conn->partner) conn->partner->partner=NULL;
|
||||
if (conn->track.hostname) free(conn->track.hostname);
|
||||
free(conn);
|
||||
}
|
||||
static tproxy_conn_t *new_conn(int fd, bool remote)
|
||||
@ -890,6 +892,25 @@ static bool handle_proxy_mode(tproxy_conn_t *conn, struct tailhead *conn_list)
|
||||
return false;
|
||||
}
|
||||
|
||||
static void tamper(tproxy_conn_t *conn, uint8_t *segment, size_t segment_buffer_size, size_t *segment_size, size_t *split_pos)
|
||||
{
|
||||
*split_pos=0;
|
||||
if (params.tamper)
|
||||
{
|
||||
if (conn->remote)
|
||||
{
|
||||
if (conn_partner_alive(conn) && !conn->partner->track.bTamperInCutoff)
|
||||
{
|
||||
tamper_in(&conn->partner->track,segment,segment_buffer_size,segment_size);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
tamper_out(&conn->track,segment,segment_buffer_size,segment_size,split_pos);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#define RD_BLOCK_SIZE 65536
|
||||
#define MAX_WASTE (1024*1024)
|
||||
static bool handle_epoll(tproxy_conn_t *conn, struct tailhead *conn_list, uint32_t evt)
|
||||
@ -942,7 +963,7 @@ static bool handle_epoll(tproxy_conn_t *conn, struct tailhead *conn_list, uint32
|
||||
if (numbytes>0)
|
||||
{
|
||||
#ifdef SPLICE_PRESENT
|
||||
if (!params.tamper || conn->remote)
|
||||
if (!params.tamper || conn->remote && conn->track.bTamperInCutoff)
|
||||
{
|
||||
// incoming data from remote leg we splice without touching
|
||||
// pipe is in the local leg, so its in conn->partner->splice_pipe
|
||||
@ -978,13 +999,11 @@ static bool handle_epoll(tproxy_conn_t *conn, struct tailhead *conn_list, uint32
|
||||
{
|
||||
conn->trd+=rd;
|
||||
|
||||
size_t split_pos=0;
|
||||
size_t split_pos;
|
||||
|
||||
bs = rd;
|
||||
#ifndef SPLICE_PRESENT
|
||||
if (!conn->remote && params.tamper)
|
||||
#endif
|
||||
modify_tcp_segment(buf,sizeof(buf),&bs,&split_pos);
|
||||
|
||||
tamper(conn, buf, sizeof(buf), &bs, &split_pos);
|
||||
|
||||
if (split_pos)
|
||||
{
|
||||
@ -1070,8 +1089,13 @@ static bool read_all_and_buffer(tproxy_conn_t *conn, int buffer_number)
|
||||
conn->partner->wr_buf[buffer_number].len = rd;
|
||||
|
||||
conn->partner->bFlowOut = true;
|
||||
|
||||
size_t split_pos;
|
||||
tamper(conn, conn->partner->wr_buf[buffer_number].data, numbytes, &conn->partner->wr_buf[buffer_number].len, &split_pos);
|
||||
|
||||
if (epoll_update_flow(conn->partner))
|
||||
return true;
|
||||
|
||||
}
|
||||
send_buffer_free(conn->partner->wr_buf+buffer_number);
|
||||
}
|
||||
@ -1254,6 +1278,8 @@ int event_loop(const int *listen_fd, size_t listen_fd_ct)
|
||||
VPRINT("Socket fd=%d (partner_fd=%d, remote=%d) %s so_error=%d (%s)",conn->fd,conn->partner ? conn->partner->fd : 0,conn->remote,se,errn,strerror(errn));
|
||||
proxy_remote_conn_ack(conn,errn);
|
||||
read_all_and_buffer(conn,3);
|
||||
if (errn==ECONNRESET && conn->remote && conn_partner_alive(conn)) rst_in(&conn->partner->track);
|
||||
|
||||
conn_close_with_partner_check(&conn_list,&close_list,conn);
|
||||
continue;
|
||||
}
|
||||
@ -1270,6 +1296,7 @@ int event_loop(const int *listen_fd, size_t listen_fd_ct)
|
||||
{
|
||||
DBGPRINT("EPOLLRDHUP")
|
||||
read_all_and_buffer(conn,2);
|
||||
if (!conn->remote) hup_out(&conn->track);
|
||||
|
||||
if (conn_has_unsent(conn))
|
||||
{
|
||||
|
||||
@ -3,6 +3,7 @@
|
||||
#include <stdbool.h>
|
||||
#include <sys/queue.h>
|
||||
#include <time.h>
|
||||
#include "tamper.h"
|
||||
|
||||
#define BACKLOG 10
|
||||
#define MAX_EPOLL_EVENTS 64
|
||||
@ -27,7 +28,7 @@ typedef uint8_t conn_state_t;
|
||||
// when pos==len its time to free buffer
|
||||
struct send_buffer
|
||||
{
|
||||
char *data;
|
||||
uint8_t *data;
|
||||
size_t len,pos;
|
||||
int ttl;
|
||||
};
|
||||
@ -84,6 +85,8 @@ struct tproxy_conn
|
||||
// buffer cannot be sent if there is unsent data in a lower buffer
|
||||
struct send_buffer wr_buf[4];
|
||||
|
||||
t_ctrack track;
|
||||
|
||||
//Create the struct which contains ptrs to next/prev element
|
||||
TAILQ_ENTRY(tproxy_conn) conn_ptrs;
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user