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nfqws: ipfrag
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bol-van
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@ -27,6 +27,7 @@ ipfw add 100 fwd ::1,988 tcp from any to any 80,443 proto ip6 recv em1
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ipfw delete 100
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ipfw add 100 divert 989 tcp from any to any 80,443 out not diverted not sockarg xmit em0
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ipfw add 100 divert 989 udp from any to any 443 out not diverted not sockarg xmit em0
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ipfw delete 100
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ipfw add 100 allow tcp from me to table\(nozapret\) 80,443
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@ -210,3 +210,7 @@ blockcheck.sh
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v43
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nfqws: UDP desync with conntrack support (any-protocol only for now)
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v44
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nfqws: ipfrag
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@ -5,13 +5,14 @@ iptables -t mangle -I PREROUTING -p tcp --sport 80 --tcp-flags SYN,ACK SYN,ACK -
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For outgoing data manipulation ("Host:" case changing) :
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iptables -t mangle -I POSTROUTING -p tcp --dport 80 -j NFQUEUE --queue-num 200 --queue-bypass
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iptables -t mangle -I POSTROUTING -p tcp --dport 80 -m set --match-set zapret dst -j NFQUEUE --queue-num 200 --queue-bypass
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iptables -t mangle -I POSTROUTING -p tcp --dport 80 -m set --match-set zapret dst -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:5 -j NFQUEUE --queue-num 200 --queue-bypass
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For dpi desync attack :
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iptables -t mangle -I POSTROUTING -p tcp -m multiport --dports 80,443 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 2:4 -m mark ! --mark 0x40000000/0x40000000 -j NFQUEUE --queue-num 200 --queue-bypass
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iptables -t mangle -I POSTROUTING -p tcp --dport 443 -m mark ! --mark 0x40000000/0x40000000 -j NFQUEUE --queue-num 200 --queue-bypass
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iptables -t mangle -I POSTROUTING -p udp --dport 443 -m mark ! --mark 0x40000000/0x40000000 -j NFQUEUE --queue-num 200 --queue-bypass
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For TPROXY :
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@ -139,7 +139,7 @@ nfqws takes the following parameters:
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--pidfile=<filename> ; write pid to file
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--user=<username> ; drop root privs
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--uid=uid[:gid] ; drop root privs
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--dpi-desync=[<mode0,]<mode>[,<mode2>] ; desync dpi state. modes : synack fake rst rstack disorder disorder2 split split2
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--dpi-desync=[<mode0,]<mode>[,<mode2>] ; desync dpi state. modes : synack fake rst rstack disorder disorder2 split split2 ipfrag2
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--dpi-desync-fwmark=<int|0xHEX> ; override fwmark for desync packet. default = 0x40000000
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--dpi-desync-ttl=<int> ; set ttl for desync packet
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--dpi-desync-ttl6=<int> ; set ipv6 hop limit for desync packet. by default ttl value is used
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@ -148,6 +148,8 @@ nfqws takes the following parameters:
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--dpi-desync-repeats=<N> ; send every desync packet N times
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--dpi-desync-skip-nosni=0|1 ; 1(default)=do not apply desync to requests without hostname in the SNI
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--dpi-desync-split-pos=<1..1500> ; (for split* and disorder* only) split TCP packet at specified position
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--dpi-desync-ipfrag-pos-tcp=<8..9216> ; ip frag position starting from the second header (usually transport header). multiple of 8, default 8.
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--dpi-desync-ipfrag-pos-udp=<8..9216> ; ip frag position starting from the second header (usually transport header). multiple of 8, default 32.
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--dpi-desync-badseq-increment=<int|0xHEX> ; badseq fooling seq signed increment. default -10000
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--dpi-desync-badack-increment=<int|0xHEX> ; badseq fooling ackseq signed increment. default -66000
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--dpi-desync-any-protocol=0|1 ; 0(default)=desync only http and tls 1=desync any nonempty data packet
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@ -391,6 +393,14 @@ parameter of `--ctrack-timeouts`.
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Fake attack is useful only for stateful DPI and useless for stateless dealing with each packet independently.
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By default fake payload is 64 zeroes. Can be overriden using `--dpi-desync-fake-unknown-udp`.
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### IP fragmentation
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Modern network is very hostile to IP fragmentation. Fragmented packets are often not delivered or refragmented/reassembled
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on the way. Linux always reassembles forwarded fragmented ipv6 if possible and it cannot be disablled.
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But Linux can send fragments.
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Frag position is set independently for tcp and udp. By default 24 and 8, must be multiple of 8.
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Offset starts from the header following ip header - transport header in most cases.
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## tpws
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@ -1,4 +1,4 @@
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zapret v.43
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zapret v.44
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English
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-------
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@ -187,7 +187,7 @@ nfqws
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--hostnospace ; убрать пробел после "Host:" и переместить его в конец значения "User-Agent:" для сохранения длины пакета
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--hostspell=HoST ; точное написание заголовка Host (можно "HOST" или "HoSt"). автоматом включает --hostcase
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--domcase ; домен после Host: сделать таким : TeSt.cOm
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--dpi-desync=[<mode0>,]<mode>[,<mode2] ; атака по десинхронизации DPI. mode : synack fake rst rstack disorder disorder2 split split2
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--dpi-desync=[<mode0>,]<mode>[,<mode2] ; атака по десинхронизации DPI. mode : synack fake rst rstack disorder disorder2 split split2 ipfrag2
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--dpi-desync-fwmark=<int|0xHEX> ; бит fwmark для пометки десинхронизирующих пакетов, чтобы они повторно не падали в очередь. default = 0x40000000
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--dpi-desync-ttl=<int> ; установить ttl для десинхронизирующих пакетов
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--dpi-desync-ttl6=<int> ; установить ipv6 hop limit для десинхронизирующих пакетов. если не указано, используется значение ttl
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@ -418,13 +418,20 @@ window size итоговый размер окна стал максимальн
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ПОДДЕРЖКА UDP
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Атаки на udp более ограничены в возможностях. udp нельзя фрагментировать иначе, чем на уровне ip.
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ip фрагментация на данный момент не реализована.
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Пока что реализован только метод десинхронизации fake в режиме --dpi-desync-any-protocol.
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Реализован conntrack для udp. Можно пользоваться --dpi-desync-cutoff. Таймаут conntrack для udp
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можно изменить 4-м параметром в --ctrack-timeouts.
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Атака fake полезна только для stateful DPI, она бесполезна для анализа на уровне отдельных пакетов.
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По умолчанию fake наполнение - 64 нуля. Можно указать файл в --dpi-desync-fake-unknown-udp.
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IP ФРАГМЕНТАЦИЯ
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В современной сети с этом все очень плохо. Фрагментированные пакеты застревают по пути, часто отбрасываются.
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Иногда доходят. Иногда то доходят, то не доходят. Может зависеть от версии ipv4/ipv6.
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Роутеры на базе linux и freebsd могут самопроизвольно собирать или перефрагментировать пакеты.
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Linux всегда собирает проходящие ipv6 фрагменты, и это неотключаемо, но может отсылать фрагменты сам.
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Позиция фрагментации задается отдельно для tcp и udp. По умолчанию 24 и 8 соответственно, должна быть кратна 8.
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Смещение считается с заголовка, следующего за ip. В большинство случаев это транспортный заголовок.
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tpws
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-----
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@ -307,6 +307,100 @@ bool prepare_udp_segment(
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// split ipv4 packet into 2 fragments at data payload position frag_pos
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bool ip_frag4(
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const uint8_t *pkt, size_t pkt_size,
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size_t frag_pos, uint32_t ident,
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uint8_t *pkt1, size_t *pkt1_size,
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uint8_t *pkt2, size_t *pkt2_size)
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{
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uint16_t hdrlen, payload_len;
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// frag_pos must be 8-byte aligned
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if (frag_pos & 7 || pkt_size < sizeof(struct ip)) return false;
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payload_len = htons(((struct ip *)pkt)->ip_len);
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hdrlen = ((struct ip *)pkt)->ip_hl<<2;
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if (payload_len>pkt_size || hdrlen>pkt_size || hdrlen>payload_len) return false;
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payload_len -= hdrlen;
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if (frag_pos>=payload_len || *pkt1_size<(hdrlen+frag_pos) || *pkt2_size<(hdrlen+payload_len-frag_pos)) return false;
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memcpy(pkt1, pkt, hdrlen+frag_pos);
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((struct ip*)pkt1)->ip_off = htons(IP_MF);
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((struct ip*)pkt1)->ip_len = htons(hdrlen+frag_pos);
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if (ident!=(uint32_t)-1) ((struct ip*)pkt1)->ip_id = (uint16_t)ident;
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*pkt1_size=hdrlen+frag_pos;
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ip4_fix_checksum((struct ip *)pkt1);
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memcpy(pkt2, pkt, hdrlen);
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memcpy(pkt2+hdrlen, pkt+hdrlen+frag_pos, payload_len-frag_pos);
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((struct ip*)pkt2)->ip_off = htons((uint16_t)frag_pos>>3 & IP_OFFMASK);
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((struct ip*)pkt2)->ip_len = htons(hdrlen+payload_len-frag_pos);
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if (ident!=(uint32_t)-1) ((struct ip*)pkt2)->ip_id = (uint16_t)ident;
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*pkt2_size=hdrlen+payload_len-frag_pos;
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ip4_fix_checksum((struct ip *)pkt2);
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return true;
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}
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bool ip_frag6(
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const uint8_t *pkt, size_t pkt_size,
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size_t frag_pos, uint32_t ident,
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uint8_t *pkt1, size_t *pkt1_size,
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uint8_t *pkt2, size_t *pkt2_size)
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{
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uint16_t payload_len;
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uint8_t proto;
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struct ip6_frag *frag;
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if (frag_pos & 7 || pkt_size < sizeof(struct ip6_hdr)) return false;
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payload_len = htons(((struct ip6_hdr*)pkt)->ip6_ctlun.ip6_un1.ip6_un1_plen);
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if ((sizeof(struct ip6_hdr)+payload_len)>pkt_size || frag_pos>=payload_len ||
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*pkt1_size<(sizeof(struct ip6_hdr)+sizeof(struct ip6_frag)+frag_pos) ||
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*pkt2_size<(sizeof(struct ip6_hdr)+sizeof(struct ip6_frag)+payload_len-frag_pos))
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{
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return false;
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}
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proto = ((struct ip6_hdr*)pkt)->ip6_ctlun.ip6_un1.ip6_un1_nxt;
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memcpy(pkt1, pkt, sizeof(struct ip6_hdr));
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((struct ip6_hdr*)pkt1)->ip6_ctlun.ip6_un1.ip6_un1_plen = htons(sizeof(struct ip6_frag)+frag_pos);
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((struct ip6_hdr*)pkt1)->ip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_FRAGMENT;
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frag = (struct ip6_frag*)(((struct ip6_hdr*)pkt1)+1);
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frag->ip6f_nxt = proto;
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frag->ip6f_reserved = 0;
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frag->ip6f_offlg = IP6F_MORE_FRAG;
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frag->ip6f_ident = ident;
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memcpy(frag+1, pkt+sizeof(struct ip6_hdr), frag_pos);
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*pkt1_size = sizeof(struct ip6_hdr)+sizeof(struct ip6_frag)+frag_pos;
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memcpy(pkt2, pkt, sizeof(struct ip6_hdr));
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((struct ip6_hdr*)pkt2)->ip6_ctlun.ip6_un1.ip6_un1_plen = htons(sizeof(struct ip6_frag)+payload_len-frag_pos);
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((struct ip6_hdr*)pkt2)->ip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_FRAGMENT;
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frag = (struct ip6_frag*)(((struct ip6_hdr*)pkt2)+1);
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frag->ip6f_nxt = proto;
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frag->ip6f_reserved = 0;
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frag->ip6f_offlg = htons(frag_pos);
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frag->ip6f_ident = ident;
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memcpy(frag+1, pkt+sizeof(struct ip6_hdr)+frag_pos, payload_len-frag_pos);
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*pkt2_size = sizeof(struct ip6_hdr)+sizeof(struct ip6_frag)+payload_len-frag_pos;
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return true;
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}
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bool ip_frag(
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const uint8_t *pkt, size_t pkt_size,
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size_t frag_pos, uint32_t ident,
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uint8_t *pkt1, size_t *pkt1_size,
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uint8_t *pkt2, size_t *pkt2_size)
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{
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if (proto_check_ipv4(pkt,pkt_size))
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return ip_frag4(pkt,pkt_size,frag_pos,ident,pkt1,pkt1_size,pkt2,pkt2_size);
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else if (proto_check_ipv6(pkt,pkt_size))
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return ip_frag6(pkt,pkt_size,frag_pos,ident,pkt1,pkt1_size,pkt2,pkt2_size);
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else
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return false;
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}
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void extract_ports(const struct tcphdr *tcphdr, const struct udphdr *udphdr, uint8_t *proto, uint16_t *sport, uint16_t *dport)
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{
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if (sport) *sport = htons(tcphdr ? tcphdr->th_sport : udphdr ? udphdr->uh_sport : 0);
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@ -84,6 +84,24 @@ bool prepare_udp_segment(
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uint8_t *buf, size_t *buflen);
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// ipv4: ident==-1 - copy ip_id from original ipv4 packet
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bool ip_frag4(
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const uint8_t *pkt, size_t pkt_size,
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size_t frag_pos, uint32_t ident,
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uint8_t *pkt1, size_t *pkt1_size,
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uint8_t *pkt2, size_t *pkt2_size);
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bool ip_frag6(
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const uint8_t *pkt, size_t pkt_size,
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size_t frag_pos, uint32_t ident,
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uint8_t *pkt1, size_t *pkt1_size,
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uint8_t *pkt2, size_t *pkt2_size);
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bool ip_frag(
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const uint8_t *pkt, size_t pkt_size,
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size_t frag_pos, uint32_t ident,
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uint8_t *pkt1, size_t *pkt1_size,
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uint8_t *pkt2, size_t *pkt2_size);
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void extract_ports(const struct tcphdr *tcphdr, const struct udphdr *udphdr, uint8_t *proto, uint16_t *sport, uint16_t *dport);
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void extract_endpoints(const struct ip *ip,const struct ip6_hdr *ip6hdr,const struct tcphdr *tcphdr,const struct udphdr *udphdr, struct sockaddr_storage *src, struct sockaddr_storage *dst);
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uint8_t *tcp_find_option(struct tcphdr *tcp, uint8_t kind);
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182
nfq/desync.c
182
nfq/desync.c
@ -50,7 +50,8 @@ const uint8_t fake_tls_clienthello_default[517] = {
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0x00, 0x00, 0x00, 0x00, 0x00
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};
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#define PKT_MAXDUMP 32
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#define PKTDATA_MAXDUMP 32
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#define IP_MAXDUMP 64
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static uint8_t zeropkt[DPI_DESYNC_MAX_FAKE_LEN];
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@ -70,7 +71,7 @@ bool desync_valid_first_stage(enum dpi_desync_mode mode)
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}
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bool desync_valid_second_stage(enum dpi_desync_mode mode)
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{
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return mode==DESYNC_NONE || mode==DESYNC_DISORDER || mode==DESYNC_DISORDER2 || mode==DESYNC_SPLIT || mode==DESYNC_SPLIT2;
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return mode==DESYNC_NONE || mode==DESYNC_DISORDER || mode==DESYNC_DISORDER2 || mode==DESYNC_SPLIT || mode==DESYNC_SPLIT2 || mode==DESYNC_IPFRAG2;
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}
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enum dpi_desync_mode desync_mode_from_string(const char *s)
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{
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@ -92,6 +93,8 @@ enum dpi_desync_mode desync_mode_from_string(const char *s)
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return DESYNC_SPLIT;
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else if (!strcmp(s,"split2"))
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return DESYNC_SPLIT2;
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else if (!strcmp(s,"ipfrag2"))
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return DESYNC_IPFRAG2;
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return DESYNC_INVALID;
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}
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@ -151,8 +154,8 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
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bool bReverse=false;
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struct sockaddr_storage src, dst;
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uint8_t newdata[DPI_DESYNC_MAX_FAKE_LEN+100];
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size_t newlen;
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uint8_t pkt1[DPI_DESYNC_MAX_FAKE_LEN+100], pkt2[DPI_DESYNC_MAX_FAKE_LEN+100];
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size_t pkt1_len, pkt2_len;
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uint8_t ttl_orig,ttl_fake,flags_orig,scale_factor;
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uint32_t *timestamps;
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@ -210,15 +213,15 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
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if (params.desync_mode0==DESYNC_SYNACK && tcp_syn_segment(tcphdr))
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{
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newlen = sizeof(newdata);
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pkt1_len = sizeof(pkt1);
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if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, TH_SYN|TH_ACK, tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
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ttl_fake,params.desync_fooling_mode,params.desync_badseq_increment,params.desync_badseq_ack_increment,
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NULL, 0, newdata, &newlen))
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NULL, 0, pkt1, &pkt1_len))
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{
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return res;
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}
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DLOG("sending fake SYNACK\n");
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if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, newdata, newlen))
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if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
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return res;
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}
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@ -349,26 +352,26 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
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enum dpi_desync_mode desync_mode = params.desync_mode;
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bool b;
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newlen = sizeof(newdata);
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pkt1_len = sizeof(pkt1);
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b = false;
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switch(desync_mode)
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{
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case DESYNC_FAKE:
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if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
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ttl_fake,params.desync_fooling_mode,params.desync_badseq_increment,params.desync_badseq_ack_increment,
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fake, fake_size, newdata, &newlen))
|
||||
fake, fake_size, pkt1, &pkt1_len))
|
||||
{
|
||||
return res;
|
||||
}
|
||||
DLOG("sending fake request : ");
|
||||
hexdump_limited_dlog(fake,fake_size,PKT_MAXDUMP); DLOG("\n")
|
||||
hexdump_limited_dlog(fake,fake_size,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
b = true;
|
||||
break;
|
||||
case DESYNC_RST:
|
||||
case DESYNC_RSTACK:
|
||||
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, TH_RST | (desync_mode==DESYNC_RSTACK ? TH_ACK:0), tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
|
||||
ttl_fake,params.desync_fooling_mode,params.desync_badseq_increment,params.desync_badseq_ack_increment,
|
||||
NULL, 0, newdata, &newlen))
|
||||
NULL, 0, pkt1, &pkt1_len))
|
||||
{
|
||||
return res;
|
||||
}
|
||||
@ -379,7 +382,7 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
|
||||
if (b)
|
||||
{
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, newdata, newlen))
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
if (params.desync_mode2==DESYNC_NONE)
|
||||
{
|
||||
@ -406,13 +409,13 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
desync_mode = params.desync_mode2;
|
||||
}
|
||||
|
||||
newlen = sizeof(newdata);
|
||||
size_t split_pos=len_payload>params.desync_split_pos ? params.desync_split_pos : 1;
|
||||
pkt1_len = sizeof(pkt1);
|
||||
switch(desync_mode)
|
||||
{
|
||||
case DESYNC_DISORDER:
|
||||
case DESYNC_DISORDER2:
|
||||
{
|
||||
size_t split_pos=len_payload>params.desync_split_pos ? params.desync_split_pos : 1;
|
||||
uint8_t fakeseg[DPI_DESYNC_MAX_FAKE_LEN+100];
|
||||
size_t fakeseg_len;
|
||||
|
||||
@ -420,11 +423,11 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
{
|
||||
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, net32_add(tcphdr->th_seq,split_pos), tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
|
||||
ttl_orig,FOOL_NONE,params.desync_badseq_increment,params.desync_badseq_ack_increment,
|
||||
data_payload+split_pos, len_payload-split_pos, newdata, &newlen))
|
||||
data_payload+split_pos, len_payload-split_pos, pkt1, &pkt1_len))
|
||||
return res;
|
||||
DLOG("sending 2nd out-of-order tcp segment %zu-%zu len=%zu : ",split_pos,len_payload-1, len_payload-split_pos)
|
||||
hexdump_limited_dlog(data_payload+split_pos,len_payload-split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, newdata, newlen))
|
||||
hexdump_limited_dlog(data_payload+split_pos,len_payload-split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
}
|
||||
|
||||
@ -437,26 +440,26 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
zeropkt, split_pos, fakeseg, &fakeseg_len))
|
||||
return res;
|
||||
DLOG("sending fake(1) 1st out-of-order tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, fakeseg, fakeseg_len))
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
newlen = sizeof(newdata);
|
||||
pkt1_len = sizeof(pkt1);
|
||||
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
|
||||
ttl_orig,FOOL_NONE,params.desync_badseq_increment,params.desync_badseq_ack_increment,
|
||||
data_payload, split_pos, newdata, &newlen))
|
||||
data_payload, split_pos, pkt1, &pkt1_len))
|
||||
return res;
|
||||
DLOG("sending 1st out-of-order tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
|
||||
hexdump_limited_dlog(data_payload,split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, newdata, newlen))
|
||||
hexdump_limited_dlog(data_payload,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
|
||||
if (desync_mode==DESYNC_DISORDER)
|
||||
{
|
||||
DLOG("sending fake(2) 1st out-of-order tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, fakeseg, fakeseg_len))
|
||||
return res;
|
||||
}
|
||||
@ -467,7 +470,6 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
case DESYNC_SPLIT:
|
||||
case DESYNC_SPLIT2:
|
||||
{
|
||||
size_t split_pos=len_payload>params.desync_split_pos ? params.desync_split_pos : 1;
|
||||
uint8_t fakeseg[DPI_DESYNC_MAX_FAKE_LEN+100];
|
||||
size_t fakeseg_len;
|
||||
|
||||
@ -479,45 +481,74 @@ packet_process_result dpi_desync_tcp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
zeropkt, split_pos, fakeseg, &fakeseg_len))
|
||||
return res;
|
||||
DLOG("sending fake(1) 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, fakeseg, fakeseg_len))
|
||||
return res;
|
||||
}
|
||||
|
||||
newlen = sizeof(newdata);
|
||||
pkt1_len = sizeof(pkt1);
|
||||
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
|
||||
ttl_orig,FOOL_NONE,params.desync_badseq_increment,params.desync_badseq_ack_increment,
|
||||
data_payload, split_pos, newdata, &newlen))
|
||||
data_payload, split_pos, pkt1, &pkt1_len))
|
||||
return res;
|
||||
DLOG("sending 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
|
||||
hexdump_limited_dlog(data_payload,split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, newdata, newlen))
|
||||
hexdump_limited_dlog(data_payload,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
|
||||
if (desync_mode==DESYNC_SPLIT)
|
||||
{
|
||||
DLOG("sending fake(2) 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
hexdump_limited_dlog(zeropkt,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, fakeseg, fakeseg_len))
|
||||
return res;
|
||||
}
|
||||
|
||||
if (split_pos<len_payload)
|
||||
{
|
||||
newlen = sizeof(newdata);
|
||||
pkt1_len = sizeof(pkt1);
|
||||
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, net32_add(tcphdr->th_seq,split_pos), tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
|
||||
ttl_orig,FOOL_NONE,params.desync_badseq_increment,params.desync_badseq_ack_increment,
|
||||
data_payload+split_pos, len_payload-split_pos, newdata, &newlen))
|
||||
data_payload+split_pos, len_payload-split_pos, pkt1, &pkt1_len))
|
||||
return res;
|
||||
DLOG("sending 2nd tcp segment %zu-%zu len=%zu : ",split_pos,len_payload-1, len_payload-split_pos)
|
||||
hexdump_limited_dlog(data_payload+split_pos,len_payload-split_pos,PKT_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, newdata, newlen))
|
||||
hexdump_limited_dlog(data_payload+split_pos,len_payload-split_pos,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
}
|
||||
|
||||
return drop;
|
||||
}
|
||||
break;
|
||||
case DESYNC_IPFRAG2:
|
||||
{
|
||||
#ifdef __FreeBSD__
|
||||
// FreeBSD tend to pass ipv6 frames with wrong checksum
|
||||
if (ip6hdr)
|
||||
tcp_fix_checksum(tcphdr,len_tcp,ip,ip6hdr);
|
||||
#endif
|
||||
|
||||
size_t ipfrag_pos = (params.desync_ipfrag_pos_tcp && params.desync_ipfrag_pos_tcp<len_tcp) ? params.desync_ipfrag_pos_tcp : 24;
|
||||
uint32_t ident = ip ? ip->ip_id ? ip->ip_id : htons(1+random()%0xFFFF) : htonl(1+random()&0xFFFFFFFF);
|
||||
|
||||
pkt1_len = sizeof(pkt1);
|
||||
pkt2_len = sizeof(pkt2);
|
||||
|
||||
if (!ip_frag(data_pkt, len_pkt, ipfrag_pos, ident, pkt1, &pkt1_len, pkt2, &pkt2_len))
|
||||
return res;
|
||||
|
||||
DLOG("sending 1st ip fragment 0-%zu len=%zu : ", ipfrag_pos-1, ipfrag_pos)
|
||||
hexdump_limited_dlog(pkt1,pkt1_len,IP_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt2, pkt2_len))
|
||||
return res;
|
||||
|
||||
DLOG("sending 2nd ip fragment %zu-%zu len=%zu : ", ipfrag_pos, len_tcp-1, len_tcp-ipfrag_pos)
|
||||
hexdump_limited_dlog(pkt2,pkt2_len,IP_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
|
||||
return frag;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -533,8 +564,8 @@ packet_process_result dpi_desync_udp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
bool bReverse=false;
|
||||
|
||||
struct sockaddr_storage src, dst;
|
||||
uint8_t newdata[DPI_DESYNC_MAX_FAKE_LEN+100];
|
||||
size_t newlen;
|
||||
uint8_t pkt1[DPI_DESYNC_MAX_FAKE_LEN+100], pkt2[DPI_DESYNC_MAX_FAKE_LEN+100];
|
||||
size_t pkt1_len, pkt2_len;
|
||||
uint8_t ttl_orig,ttl_fake;
|
||||
|
||||
if (!!ip == !!ip6hdr) return res; // one and only one must be present
|
||||
@ -579,6 +610,8 @@ packet_process_result dpi_desync_udp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
if (!params.desync_any_proto) return res;
|
||||
DLOG("applying tampering to unknown protocol\n")
|
||||
|
||||
enum dpi_desync_mode desync_mode = params.desync_mode;
|
||||
|
||||
ttl_orig = ip ? ip->ip_ttl : ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_hlim;
|
||||
if (ip6hdr) ttl_fake = params.desync_ttl6 ? params.desync_ttl6 : ttl_orig;
|
||||
else ttl_fake = params.desync_ttl ? params.desync_ttl : ttl_orig;
|
||||
@ -596,36 +629,77 @@ packet_process_result dpi_desync_udp_packet(uint8_t *data_pkt, size_t len_pkt, s
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
newlen = sizeof(newdata);
|
||||
pkt1_len = sizeof(pkt1);
|
||||
b = false;
|
||||
switch(params.desync_mode)
|
||||
switch(desync_mode)
|
||||
{
|
||||
case DESYNC_FAKE:
|
||||
if (!prepare_udp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, ttl_fake, params.desync_fooling_mode, fake, fake_size, newdata, &newlen))
|
||||
if (!prepare_udp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, ttl_fake, params.desync_fooling_mode, fake, fake_size, pkt1, &pkt1_len))
|
||||
return res;
|
||||
DLOG("sending fake request : ");
|
||||
hexdump_limited_dlog(fake,fake_size,PKT_MAXDUMP); DLOG("\n")
|
||||
hexdump_limited_dlog(fake,fake_size,PKTDATA_MAXDUMP); DLOG("\n")
|
||||
b = true;
|
||||
break;
|
||||
}
|
||||
|
||||
if (b)
|
||||
{
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, newdata, newlen))
|
||||
return res;
|
||||
DLOG("reinjecting original packet. len=%zu len_payload=%zu\n", len_pkt, len_payload)
|
||||
#ifdef __FreeBSD__
|
||||
// FreeBSD tend to pass ipv6 frames with wrong checksum
|
||||
if (res==modify || ip6hdr)
|
||||
#else
|
||||
// if original packet was tampered earlier it needs checksum fixed
|
||||
if (res==modify)
|
||||
#endif
|
||||
udp_fix_checksum(udphdr,sizeof(struct udphdr)+len_payload,ip,ip6hdr);
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, data_pkt, len_pkt))
|
||||
return res;
|
||||
return drop;
|
||||
if (params.desync_mode2==DESYNC_NONE)
|
||||
{
|
||||
if (!rawsend_rep((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
DLOG("reinjecting original packet. len=%zu len_payload=%zu\n", len_pkt, len_payload)
|
||||
#ifdef __FreeBSD__
|
||||
// FreeBSD tend to pass ipv6 frames with wrong checksum
|
||||
if (res==modify || ip6hdr)
|
||||
#else
|
||||
// if original packet was tampered earlier it needs checksum fixed
|
||||
if (res==modify)
|
||||
#endif
|
||||
udp_fix_checksum(udphdr,sizeof(struct udphdr)+len_payload,ip,ip6hdr);
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, data_pkt, len_pkt))
|
||||
return res;
|
||||
return drop;
|
||||
}
|
||||
desync_mode = params.desync_mode2;
|
||||
}
|
||||
|
||||
switch(desync_mode)
|
||||
{
|
||||
case DESYNC_IPFRAG2:
|
||||
{
|
||||
|
||||
#ifdef __FreeBSD__
|
||||
// FreeBSD tend to pass ipv6 frames with wrong checksum
|
||||
if (ip6hdr)
|
||||
udp_fix_checksum(udphdr,sizeof(struct udphdr)+len_payload,ip,ip6hdr);
|
||||
#endif
|
||||
|
||||
size_t len_transport = len_payload + sizeof(struct udphdr);
|
||||
size_t ipfrag_pos = (params.desync_ipfrag_pos_udp && params.desync_ipfrag_pos_udp<len_transport) ? params.desync_ipfrag_pos_udp : sizeof(struct udphdr);
|
||||
// freebsd do not set ip.id
|
||||
uint32_t ident = ip ? ip->ip_id ? ip->ip_id : htons(1+random()%0xFFFF) : htonl(1+random()&0xFFFFFFFF);
|
||||
|
||||
pkt1_len = sizeof(pkt1);
|
||||
pkt2_len = sizeof(pkt2);
|
||||
|
||||
if (!ip_frag(data_pkt, len_pkt, ipfrag_pos, ident, pkt1, &pkt1_len, pkt2, &pkt2_len))
|
||||
return res;
|
||||
|
||||
DLOG("sending 1st ip fragment 0-%zu len=%zu : ", ipfrag_pos-1, ipfrag_pos)
|
||||
hexdump_limited_dlog(pkt1,pkt1_len,IP_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt2, pkt2_len))
|
||||
return res;
|
||||
|
||||
DLOG("sending 2nd ip fragment %zu-%zu len=%zu : ", ipfrag_pos, len_transport-1, len_transport-ipfrag_pos)
|
||||
hexdump_limited_dlog(pkt2,pkt2_len,IP_MAXDUMP); DLOG("\n")
|
||||
if (!rawsend((struct sockaddr *)&dst, params.desync_fwmark, pkt1, pkt1_len))
|
||||
return res;
|
||||
|
||||
return frag;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
return res;
|
||||
|
||||
@ -28,7 +28,8 @@ enum dpi_desync_mode {
|
||||
DESYNC_DISORDER,
|
||||
DESYNC_DISORDER2,
|
||||
DESYNC_SPLIT,
|
||||
DESYNC_SPLIT2
|
||||
DESYNC_SPLIT2,
|
||||
DESYNC_IPFRAG2
|
||||
};
|
||||
|
||||
extern const char *fake_http_request_default;
|
||||
|
||||
90
nfq/nfqws.c
90
nfq/nfqws.c
@ -148,7 +148,7 @@ static packet_process_result processPacketData(uint8_t *data_pkt, size_t len_pkt
|
||||
// ipv6 packets were with incorrect checksum
|
||||
#ifdef __FreeBSD__
|
||||
// FreeBSD tend to pass ipv6 frames with wrong checksum
|
||||
if (res==modify || ip6hdr)
|
||||
if (res==modify || res!=frag && ip6hdr)
|
||||
#else
|
||||
if (res==modify)
|
||||
#endif
|
||||
@ -171,7 +171,7 @@ static packet_process_result processPacketData(uint8_t *data_pkt, size_t len_pkt
|
||||
res = dpi_desync_udp_packet(data_pkt, len_pkt, ip, ip6hdr, udphdr, data, len);
|
||||
#ifdef __FreeBSD__
|
||||
// FreeBSD tend to pass ipv6 frames with wrong checksum
|
||||
if (res==modify || ip6hdr)
|
||||
if (res==modify || res!=frag && ip6hdr)
|
||||
#else
|
||||
if (res==modify)
|
||||
#endif
|
||||
@ -209,6 +209,7 @@ static int nfq_cb(struct nfq_q_handle *qh, struct nfgenmsg *nfmsg,
|
||||
DLOG("packet: id=%d pass modified\n", id);
|
||||
return nfq_set_verdict2(qh, id, NF_ACCEPT, mark, len, data);
|
||||
case drop:
|
||||
case frag:
|
||||
DLOG("packet: id=%d drop\n", id);
|
||||
return nfq_set_verdict2(qh, id, NF_DROP, mark, 0, NULL);
|
||||
}
|
||||
@ -504,7 +505,7 @@ static void exithelp()
|
||||
" --hostspell\t\t\t\t; exact spelling of \"Host\" header. must be 4 chars. default is \"host\"\n"
|
||||
" --hostnospace\t\t\t\t; remove space after Host: and add it to User-Agent: to preserve packet size\n"
|
||||
" --domcase\t\t\t\t; mix domain case : Host: TeSt.cOm\n"
|
||||
" --dpi-desync=[<mode0>,]<mode>[,<mode2>] ; try to desync dpi state. modes : synack fake rst rstack disorder disorder2 split split2\n"
|
||||
" --dpi-desync=[<mode0>,]<mode>[,<mode2>] ; try to desync dpi state. modes : synack fake rst rstack disorder disorder2 split split2 ipfrag2\n"
|
||||
#ifdef __linux__
|
||||
" --dpi-desync-fwmark=<int|0xHEX>\t; override fwmark for desync packet. default = 0x%08X (%u)\n"
|
||||
#elif defined(SO_USER_COOKIE)
|
||||
@ -518,7 +519,9 @@ static void exithelp()
|
||||
#endif
|
||||
" --dpi-desync-repeats=<N>\t\t; send every desync packet N times\n"
|
||||
" --dpi-desync-skip-nosni=0|1\t\t; 1(default)=do not act on ClientHello without SNI (ESNI ?)\n"
|
||||
" --dpi-desync-split-pos=<1..%u>\t; TCP packet split position\n"
|
||||
" --dpi-desync-split-pos=<1..%u>\t; data payload split position\n"
|
||||
" --dpi-desync-ipfrag-pos-tcp=<8..%u>\t; ip frag position starting from the second header (usually transport header). multiple of 8, default %u.\n"
|
||||
" --dpi-desync-ipfrag-pos-udp=<8..%u>\t; ip frag position starting from the second header (usually transport header). multiple of 8, default %u.\n"
|
||||
" --dpi-desync-badseq-increment=<int|0xHEX> ; badseq fooling seq signed increment. default %d\n"
|
||||
" --dpi-desync-badack-increment=<int|0xHEX> ; badseq fooling ackseq signed increment. default %d\n"
|
||||
" --dpi-desync-any-protocol=0|1\t\t; 0(default)=desync only http and tls 1=desync any nonempty data packet\n"
|
||||
@ -533,6 +536,8 @@ static void exithelp()
|
||||
DPI_DESYNC_FWMARK_DEFAULT,DPI_DESYNC_FWMARK_DEFAULT,
|
||||
#endif
|
||||
DPI_DESYNC_MAX_FAKE_LEN,
|
||||
DPI_DESYNC_MAX_FAKE_LEN, IPFRAG_UDP_DEFAULT,
|
||||
DPI_DESYNC_MAX_FAKE_LEN, IPFRAG_TCP_DEFAULT,
|
||||
BADSEQ_INCREMENT_DEFAULT, BADSEQ_ACK_INCREMENT_DEFAULT
|
||||
);
|
||||
exit(1);
|
||||
@ -602,6 +607,8 @@ int main(int argc, char **argv)
|
||||
params.desync_fwmark = DPI_DESYNC_FWMARK_DEFAULT;
|
||||
params.desync_skip_nosni = true;
|
||||
params.desync_split_pos = 2;
|
||||
params.desync_ipfrag_pos_udp = IPFRAG_UDP_DEFAULT;
|
||||
params.desync_ipfrag_pos_tcp = IPFRAG_TCP_DEFAULT;
|
||||
params.desync_repeats = 1;
|
||||
params.fake_tls_size = sizeof(fake_tls_clienthello_default);
|
||||
memcpy(params.fake_tls,fake_tls_clienthello_default,params.fake_tls_size);
|
||||
@ -661,15 +668,17 @@ int main(int argc, char **argv)
|
||||
{"dpi-desync-repeats",required_argument,0,0}, // optidx=20
|
||||
{"dpi-desync-skip-nosni",optional_argument,0,0},// optidx=21
|
||||
{"dpi-desync-split-pos",required_argument,0,0},// optidx=22
|
||||
{"dpi-desync-badseq-increment",required_argument,0,0},// optidx=23
|
||||
{"dpi-desync-badack-increment",required_argument,0,0},// optidx=24
|
||||
{"dpi-desync-any-protocol",optional_argument,0,0},// optidx=25
|
||||
{"dpi-desync-fake-http",required_argument,0,0},// optidx=26
|
||||
{"dpi-desync-fake-tls",required_argument,0,0},// optidx=27
|
||||
{"dpi-desync-fake-unknown",required_argument,0,0},// optidx=28
|
||||
{"dpi-desync-fake-unknown-udp",required_argument,0,0},// optidx=29
|
||||
{"dpi-desync-cutoff",required_argument,0,0},// optidx=30
|
||||
{"hostlist",required_argument,0,0}, // optidx=31
|
||||
{"dpi-desync-ipfrag-pos-tcp",required_argument,0,0},// optidx=24
|
||||
{"dpi-desync-ipfrag-pos-udp",required_argument,0,0},// optidx=25
|
||||
{"dpi-desync-badseq-increment",required_argument,0,0},// optidx=26
|
||||
{"dpi-desync-badack-increment",required_argument,0,0},// optidx=27
|
||||
{"dpi-desync-any-protocol",optional_argument,0,0},// optidx=28
|
||||
{"dpi-desync-fake-http",required_argument,0,0},// optidx=29
|
||||
{"dpi-desync-fake-tls",required_argument,0,0},// optidx=30
|
||||
{"dpi-desync-fake-unknown",required_argument,0,0},// optidx=31
|
||||
{"dpi-desync-fake-unknown-udp",required_argument,0,0},// optidx=32
|
||||
{"dpi-desync-cutoff",required_argument,0,0},// optidx=33
|
||||
{"hostlist",required_argument,0,0}, // optidx=34
|
||||
{NULL,0,NULL,0}
|
||||
};
|
||||
if (argc < 2) exithelp();
|
||||
@ -806,6 +815,13 @@ int main(int argc, char **argv)
|
||||
fprintf(stderr, "invalid desync combo : %s+%s\n", mode,mode2);
|
||||
exit_clean(1);
|
||||
}
|
||||
#if defined(__OpenBSD__)
|
||||
if (params.desync_mode==DESYNC_IPFRAG2 || params.desync_mode2==DESYNC_IPFRAG2)
|
||||
{
|
||||
fprintf(stderr, "OpenBSD has checksum issues with fragmented packets. ipfrag disabled.\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
break;
|
||||
case 15: /* dpi-desync-fwmark/dpi-desync-sockarg */
|
||||
@ -866,8 +882,7 @@ int main(int argc, char **argv)
|
||||
#endif
|
||||
break;
|
||||
case 20: /* dpi-desync-repeats */
|
||||
params.desync_repeats = atoi(optarg);
|
||||
if (params.desync_repeats<=0 || params.desync_repeats>20)
|
||||
if (sscanf(optarg,"%u",¶ms.desync_repeats)<1 || params.desync_repeats<=0 || params.desync_repeats>20)
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-repeats must be within 1..20\n");
|
||||
exit_clean(1);
|
||||
@ -877,54 +892,77 @@ int main(int argc, char **argv)
|
||||
params.desync_skip_nosni = !optarg || atoi(optarg);
|
||||
break;
|
||||
case 22: /* dpi-desync-split-pos */
|
||||
params.desync_split_pos = atoi(optarg);
|
||||
if (params.desync_split_pos<1 || params.desync_split_pos>DPI_DESYNC_MAX_FAKE_LEN)
|
||||
if (sscanf(optarg,"%u",¶ms.desync_split_pos)<1 || params.desync_split_pos<1 || params.desync_split_pos>DPI_DESYNC_MAX_FAKE_LEN)
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-split-pos must be within 1..%u range\n",DPI_DESYNC_MAX_FAKE_LEN);
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 23: /* dpi-desync-badseq-increments */
|
||||
case 23: /* dpi-desync-ipfrag-pos-tcp */
|
||||
if (sscanf(optarg,"%u",¶ms.desync_ipfrag_pos_tcp)<1 || params.desync_ipfrag_pos_tcp<1 || params.desync_ipfrag_pos_tcp>DPI_DESYNC_MAX_FAKE_LEN)
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-ipfrag-pos-tcp must be within 1..%u range\n",DPI_DESYNC_MAX_FAKE_LEN);
|
||||
exit_clean(1);
|
||||
}
|
||||
if (params.desync_ipfrag_pos_tcp & 7)
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-ipfrag-pos-tcp must be multiple of 8\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 24: /* dpi-desync-ipfrag-pos-udp */
|
||||
if (sscanf(optarg,"%u",¶ms.desync_ipfrag_pos_udp)<1 || params.desync_ipfrag_pos_udp<1 || params.desync_ipfrag_pos_udp>DPI_DESYNC_MAX_FAKE_LEN)
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-ipfrag-pos-udp must be within 1..%u range\n",DPI_DESYNC_MAX_FAKE_LEN);
|
||||
exit_clean(1);
|
||||
}
|
||||
if (params.desync_ipfrag_pos_udp & 7)
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-ipfrag-pos-udp must be multiple of 8\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 25: /* dpi-desync-badseq-increments */
|
||||
if (!parse_badseq_increment(optarg,¶ms.desync_badseq_increment))
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-badseq-increment should be signed decimal or signed 0xHEX\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 24: /* dpi-desync-badack-increment */
|
||||
case 26: /* dpi-desync-badack-increment */
|
||||
if (!parse_badseq_increment(optarg,¶ms.desync_badseq_ack_increment))
|
||||
{
|
||||
fprintf(stderr, "dpi-desync-badack-increment should be signed decimal or signed 0xHEX\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 25: /* dpi-desync-any-protocol */
|
||||
case 27: /* dpi-desync-any-protocol */
|
||||
params.desync_any_proto = !optarg || atoi(optarg);
|
||||
break;
|
||||
case 26: /* dpi-desync-fake-http */
|
||||
case 28: /* dpi-desync-fake-http */
|
||||
params.fake_http_size = sizeof(params.fake_http);
|
||||
load_file_or_exit(optarg,params.fake_http,¶ms.fake_http_size);
|
||||
break;
|
||||
case 27: /* dpi-desync-fake-tls */
|
||||
case 29: /* dpi-desync-fake-tls */
|
||||
params.fake_tls_size = sizeof(params.fake_tls);
|
||||
load_file_or_exit(optarg,params.fake_tls,¶ms.fake_tls_size);
|
||||
break;
|
||||
case 28: /* dpi-desync-fake-unknown */
|
||||
case 30: /* dpi-desync-fake-unknown */
|
||||
params.fake_unknown_size = sizeof(params.fake_unknown);
|
||||
load_file_or_exit(optarg,params.fake_unknown,¶ms.fake_unknown_size);
|
||||
break;
|
||||
case 29: /* dpi-desync-fake-unknown-udp */
|
||||
case 31: /* dpi-desync-fake-unknown-udp */
|
||||
params.fake_unknown_udp_size = sizeof(params.fake_unknown_udp);
|
||||
load_file_or_exit(optarg,params.fake_unknown_udp,¶ms.fake_unknown_udp_size);
|
||||
break;
|
||||
case 30: /* desync-cutoff */
|
||||
case 32: /* desync-cutoff */
|
||||
if (!parse_cutoff(optarg, ¶ms.desync_cutoff, ¶ms.desync_cutoff_mode))
|
||||
{
|
||||
fprintf(stderr, "invalid desync-cutoff value\n");
|
||||
exit_clean(1);
|
||||
}
|
||||
break;
|
||||
case 31: /* hostlist */
|
||||
case 33: /* hostlist */
|
||||
if (!LoadHostList(¶ms.hostlist, optarg))
|
||||
exit_clean(1);
|
||||
strncpy(params.hostfile,optarg,sizeof(params.hostfile));
|
||||
|
||||
@ -2,5 +2,6 @@
|
||||
|
||||
typedef enum
|
||||
{
|
||||
pass = 0, modify, drop
|
||||
// frag=drop but do not fix checksum
|
||||
pass = 0, modify, drop, frag
|
||||
} packet_process_result;
|
||||
|
||||
@ -20,6 +20,9 @@
|
||||
#define BADSEQ_INCREMENT_DEFAULT -10000
|
||||
#define BADSEQ_ACK_INCREMENT_DEFAULT -66000
|
||||
|
||||
#define IPFRAG_UDP_DEFAULT 8
|
||||
#define IPFRAG_TCP_DEFAULT 32
|
||||
|
||||
struct params_s
|
||||
{
|
||||
bool debug;
|
||||
@ -36,7 +39,7 @@ struct params_s
|
||||
char hostspell[4];
|
||||
enum dpi_desync_mode desync_mode0,desync_mode,desync_mode2;
|
||||
bool desync_retrans,desync_skip_nosni,desync_any_proto;
|
||||
int desync_repeats,desync_split_pos;
|
||||
unsigned int desync_repeats,desync_split_pos,desync_ipfrag_pos_tcp,desync_ipfrag_pos_udp;
|
||||
char desync_cutoff_mode; // n - packets, d - data packets, s - relative sequence
|
||||
unsigned int desync_cutoff;
|
||||
uint8_t desync_ttl, desync_ttl6;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user