// Header file for program AnetTest

// **** Description of IP header (version 4) ******

// Attention: you can use this header only if you build some complex headers, containing IP header
// This header must be combined with some other headers (on the channel level at least)


 /*
 
    0                   1                   2                   3
     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |Version|  IHL  |Type of Service|          Total Length         |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |         Identification        |Flags|      Fragment OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

    |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |  Time to Live |    Protocol   |         Header Checksum       |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                       Source Address                          |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                    Destination Address                        |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                    Options                    |    Padding    |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
                     Example Internet Datagram Header
 
 */

MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0xf0
OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 4
// version of IP protocol (mask 0xf0, OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 4)
.ip.ver			 4
BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 1

MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0x0f
// length of IP header (in fours of bytes, mask 0x0f)
.ip.hlen       5

// IP: type of service
.ip.tos         0

// More detailed TOS byte

 /*
 
       Bits 0-2:  Precedence.
       Bit    3:  0 = Normal Delay,      1 = Low Delay.
       Bits   4:  0 = Normal Throughput, 1 = High Throughput.
       Bits   5:  0 = Normal Relibility, 1 = High Relibility.
       Bit  6-7:  Reserved for Future Use.
 
          0     1     2     3     4     5     6     7
       +-----+-----+-----+-----+-----+-----+-----+-----+
       |                 |     |     |     |     |     |
       |   PRECEDENCE    |  D  |  T  |  R  |  0  |  0  |
       |                 |     |     |     |     |     |
       +-----+-----+-----+-----+-----+-----+-----+-----+
 
 */

BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 1
MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0x10
OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 4

// TOS: delay flag
.delay  0

BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 1
MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0x8
OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 3

// TOS: throughput flag
.throughput  0

BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 1
MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0x4
OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 2

// TOS: reliability flag
.reliability  0

BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 1
MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0x2
OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 1

// TOS: cost flag
.cost  2

BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 1
MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0xe0
OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 5

// TOS: priority flag
.priority 0

// end of description of TOS field

// the length of IP datagram
.ip.len     	 20s2.
ip.len     	    IPlen      // auto calculated value

// ID of IP datagram
.ip.id          0s2.
MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0x1fff

// IP: the field of OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

 (mask 0x1fff)
.ip.OFFSET   PARAMETERS: <number of bites>
The position of the next defined field will be shifted to the left for the given <number of bits> which must be from 1 to 7. So every written value will be shifter to the left before writing. Nevertheless, after the writing the left bits will be also changed and set to 0. To avoid this use command MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

. See "headers/tcp_header.fws"

      0s2.
BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 2

MASK   PARAMETERS: <field's mask>
Defines the mask for the next defined field. Mask is hexadecimal number. Value for field will be written only in bits corresponding not null bits of mask. See "headers/tcp_header.fws".

 0xe0
// IP flags (mask 0xe0)
.ip.flags       0x00

PASS   PARAMETERS: <number of bytes>
Increases the byte pointer for the given <number of bytes>.

 1

// ttl
.ip.ttl         255s1.

// IP: the code of higher level protocol
.ip.proto       0x00

// IP crc
.ip.crc         0x0000
ip.crc          IPcrc      // auto calculated value

// address of source
.srcip          192.168.0.1   // field's type is IP address, DNS name may be specified later
BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 4
// address of source, first byte
.srcip1          192.
// address of source, second byte
.srcip2          168.
// address of source, third byte
.srcip3          0.
// address of source, fourth byte
.srcip4          1.

// address of destination
.dstip          192.168.0.3
BACK   PARAMETERS: <number of bytes>
Reduces the pointer for the given <number of bytes>.

 4
// address of destination, first byte
.dstip1         192
// address of destination, second byte
.dstip2         168
// address of destination, third byte
.dstip3         0
// address of destinationm, fourth byte
.dstip4         3

// protocols over IP
DEFINE   PARAMETERS: <name> <value>
Defines the substitution which will be applied while reading some values (in parameters to commands and others). <name> will be replaced by <value>. This substitution may be also performed in strings enclosed in apostrophes. In this case the <name> must be enclosed in $ (ex: 'value = $name$'. See also command GDEF   PARAMETERS: <new name> <original name>
Defines the substitution which will be applied while reading almost any read word from text. <New name> will be replaced by <original name>. This substitution may be also performed in strings enclosed in apostrophes. In this case the name must be enclosed in $ (ex: 'value = $name$').

.

 tcp  0x06
DEFINE   PARAMETERS: <name> <value>
Defines the substitution which will be applied while reading some values (in parameters to commands and others). <name> will be replaced by <value>. This substitution may be also performed in strings enclosed in apostrophes. In this case the <name> must be enclosed in $ (ex: 'value = $name$'. See also command GDEF   PARAMETERS: <new name> <original name>
Defines the substitution which will be applied while reading almost any read word from text. <New name> will be replaced by <original name>. This substitution may be also performed in strings enclosed in apostrophes. In this case the name must be enclosed in $ (ex: 'value = $name$').

.

 udp  0x11
DEFINE   PARAMETERS: <name> <value>
Defines the substitution which will be applied while reading some values (in parameters to commands and others). <name> will be replaced by <value>. This substitution may be also performed in strings enclosed in apostrophes. In this case the <name> must be enclosed in $ (ex: 'value = $name$'. See also command GDEF   PARAMETERS: <new name> <original name>
Defines the substitution which will be applied while reading almost any read word from text. <New name> will be replaced by <original name>. This substitution may be also performed in strings enclosed in apostrophes. In this case the name must be enclosed in $ (ex: 'value = $name$').

.

 icmp 0x01
DEFINE   PARAMETERS: <name> <value>
Defines the substitution which will be applied while reading some values (in parameters to commands and others). <name> will be replaced by <value>. This substitution may be also performed in strings enclosed in apostrophes. In this case the <name> must be enclosed in $ (ex: 'value = $name$'. See also command GDEF   PARAMETERS: <new name> <original name>
Defines the substitution which will be applied while reading almost any read word from text. <New name> will be replaced by <original name>. This substitution may be also performed in strings enclosed in apostrophes. In this case the name must be enclosed in $ (ex: 'value = $name$').

.

 ospf 0x59