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|
# idiomatic: ip_is_fragment ---------------------------------------------------
tcsim -n -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
#include "ip.def"
dsmark {
class (0,value 0xff) if ip_is_fragment;
class (1) if 1;
}
}
/*
* Instead of marking, this script originally dropped selected packets.
* That's why the pattern "dead" is used to mark classified packets.
*/
send 0x45 0 0 0 0 0 0 0 1 ICMP 0 0 nl:0 x 4 // no fragment
send 0x45 0 0 0 0 0 0 2 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0 3 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0 4 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0 5 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0x40 0 1 ICMP 0 0 nl:0 x 4 // ip_DF set
send 0x45 0 0 0 0 0 0x20 0 1 ICMP 0 0 nl:0 x 4 ns:0xdead // ip_MF set
end
EOF
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# idiomatic: not_ip_is_fragment -----------------------------------------------
tcsim -n -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
#include "ip.def"
dsmark {
class (0,value 0xff) if not_ip_is_fragment;
class (1) if 1;
}
}
/*
* Instead of marking, this script originally dropped packets that weren't
* selected. That's why the pattern "dead" is used to mark unclassified
* packets. (Note that this is exactly the contrary to the previous test
* case.)
*/
send 0x45 0 0 0 0 0 0 0 1 ICMP 0 0 nl:0 x 4 // no fragment
send 0x45 0 0 0 0 0 0 2 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0 3 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0 4 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0 5 1 ICMP 0 0 nl:0 x 4 ns:0xdead // non-zero offset
send 0x45 0 0 0 0 0 0x40 0 1 ICMP 0 0 nl:0 x 4 // ip_DF set
send 0x45 0 0 0 0 0 0x20 0 1 ICMP 0 0 nl:0 x 4 ns:0xdead // ip_MF set
end
EOF
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# idiomatic: ip_has_options ---------------------------------------------------
tcsim -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
dsmark {
class (0,value 0xff) if ip_has_options;
class (1) if 1;
}
}
send 0x45 0 0 0 nl:0 x 10 // no options
send 0x46 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x47 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x48 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x49 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4a 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4b 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4c 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4d 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4e 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4f 0 0 0 nl:0 x 10 ns:0xdead // has options
end
EOF
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# idiomatic: not_ip_has_options -----------------------------------------------
tcsim -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
dsmark {
class (0,value 0xff) if not_ip_has_options;
class (1) if 1;
}
}
send 0x45 0 0 0 nl:0 x 10 // no options
send 0x46 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x47 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x48 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x49 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4a 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4b 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4c 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4d 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4e 0 0 0 nl:0 x 10 ns:0xdead // has options
send 0x4f 0 0 0 nl:0 x 10 ns:0xdead // has options
end
EOF
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# idiomatic: ip_is_tiny_fragment ----------------------------------------------
tcsim -n -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
#include "ip.def"
dsmark {
class (0,value 0xff) if ip_is_tiny_fragment;
class (1) if 1;
}
}
send 0x45 0 0 0 0 0 0 0 1 ICMP 0 0 nl:1 nl:2 ns:0 0 x 2 // normal ICMP
send 0x45 0 0 0 0 0 0 0 1 ICMP 0 0 nl:1 nl:2 ns:0xdead 0 // tiny ICMP
send 0x45 0 0 0 0 0 0 0 1 TCP 0 0 nl:1 nl:2 ns:0 0 x 18 // normal TCP
send 0x45 0 0 0 0 0 0 0 1 TCP 0 0 nl:1 nl:2 ns:0xdead 0 x 17 // tiny TCP
send 0x45 0 0 0 0 0 0 0 1 UDP 0 0 nl:1 nl:2 ns:0 0 x 6 // normal UDP
send 0x45 0 0 0 0 0 0 0 1 UDP 0 0 nl:1 nl:2 ns:0xdead 0 x 5 // tiny UDP
send 0x45 0 0 0 0 0 0 1 1 ICMP 0 0 nl:1 nl:2 ns:0xdead x 10 // ip_off == 1
end
EOF
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# idiomatic: not_ip_is_tiny_fragment ------------------------------------------
tcsim -n -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
#include "ip.def"
dsmark {
class (0,value 0xff) if not_ip_is_tiny_fragment;
class (1) if 1;
}
}
send 0x45 0 0 0 0 0 0 0 1 ICMP 0 0 nl:1 nl:2 ns:0 0 x 2 // normal ICMP
send 0x45 0 0 0 0 0 0 0 1 ICMP 0 0 nl:1 nl:2 ns:0xdead 0 // tiny ICMP
send 0x45 0 0 0 0 0 0 0 1 TCP 0 0 nl:1 nl:2 ns:0 0 x 18 // normal TCP
send 0x45 0 0 0 0 0 0 0 1 TCP 0 0 nl:1 nl:2 ns:0xdead 0 x 17 // tiny TCP
send 0x45 0 0 0 0 0 0 0 1 UDP 0 0 nl:1 nl:2 ns:0 0 x 6 // normal UDP
send 0x45 0 0 0 0 0 0 0 1 UDP 0 0 nl:1 nl:2 ns:0xdead 0 x 5 // tiny UDP
send 0x45 0 0 0 0 0 0 1 1 ICMP 0 0 nl:1 nl:2 ns:0xdead x 10 // ip_off == 1
end
EOF
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# idiomatic: tcp_incoming -----------------------------------------------------
tcsim -n -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
#include "ip.def"
dsmark {
class (0,value 0xff) if tcp_incoming;
class (1) if 1;
}
}
$src = 1.2.3.4
$dst = 5.6.7.8
$sport = PORT_USER
$dport = PORT_HTTP
#define NOTHING
send TCP_PCK($flag = 0) // no flags
send TCP_PCK($flag = TCP_SYN) ns:0xdead // SYN
send TCP_PCK($flag = TCP_SYN | TCP_ACK) // SYN+ACK
send TCP_PCK($flag = TCP_ACK) // ACK
send UDP_PCK(NOTHING) // not TCP
end
EOF
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# idiomatic: not_tcp_incoming -------------------------------------------------
tcsim -n -s 2 | sed '/ D /s/.*: //p;d'
dev "eth0" 10000 {
#include "fields.tc"
#include "ip.def"
dsmark {
class (0,value 0xff) if not_tcp_incoming;
class (1) if 1;
}
}
$src = 1.2.3.4
$dst = 5.6.7.8
$sport = PORT_USER
$dport = PORT_HTTP
#define NOTHING
send TCP_PCK($flag = 0) // no flags
send TCP_PCK($flag = TCP_SYN) ns:0xdead // SYN
send TCP_PCK($flag = TCP_SYN | TCP_ACK) // SYN+ACK
send TCP_PCK($flag = TCP_ACK) // ACK
send UDP_PCK(NOTHING) // not TCP
end
EOF
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|
