element
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... The reformulations specified in this RFC follow as closely as
possible the spirit of the RFCs on which they are based, and so MAY
contain elements or attributes that would not be needed in a pure
reworking (e.g. length attributes, which are implicit in XML.)
...
... TCP and IP into a single, larger
element in the DTD) in order to foster future use of this protocol as
a basis for reformulating other protocols (such as ICMP ...
... To calculate the length and checksum fields of the IP element, a
canonicalized form of the element MUST be used. The canonical form ...
... IP element, a
canonicalized form of the element MUST be used. The canonical form
SHALL have no whitespace (including newline characters) between
...
... canonical form
SHALL have no whitespace (including newline characters) between
elements and only one space character between attributes. There
SHALL NOT be a space following the last attribute in an element ...
... elements and only one space character between attributes. There
SHALL NOT be a space following the last attribute in an element.
An iterative method ...
...
The payload element bears special attention. Due to the character
set restrictions of XML, the payload ...
... To calculate the length and checksum fields of the TCP element, a
canonicalized form of the element MUST be used as in section 2.1.
...
... TCP element, a
canonicalized form of the element MUST be used as in section 2.1.
An iterative method ...
...
The TCP offset element was expanded to a maximum of 255 from 16 to
allow for the increased size of the header in XML ...
... To calculate the length and checksum fields of the UDP element, a
canonicalized form of the element MUST be used as in section 2.1. An
...
... UDP element, a
canonicalized form of the element MUST be used as in section 2.1. An
iterative method SHOULD be used to calculate checksums ...
... value %Digits; #REQUIRED>
<!ELEMENT id EMPTY>
<!-- 0 <= id <= 65,535 -->
<!ATTLIST id
...
... value %Digits; #REQUIRED>
<!ELEMENT flags EMPTY>
<!-- df = don't fragment, mf = more fragments ...
... mf (last|more) #REQUIRED>
<!ELEMENT offset EMPTY>
<!-- 0 <= offset <= 8192 measured in 8 octet (64-bit ...
... ttl
value %Digits; #REQUIRED>
<!ELEMENT protocol EMPTY>
<!-- 0 <= protocol <= 255 (per IANA) -->
...
... value %Digits; #REQUIRED>
<!ELEMENT source EMPTY>
<!ATTLIST source
address %IP4Addr; #REQUIRED>
...
... source
address %IP4Addr; #REQUIRED>
<!ELEMENT destination EMPTY>
<!ATTLIST destination
address ...
... destination
address %IP4Addr; #REQUIRED>
<!ELEMENT options ( end | noop | security | loose | strict | record
| stream ...
... number CDATA #FIXED "0">
<!ELEMENT noop EMPTY>
<!ATTLIST noop
copied (0|1) #REQUIRED
...
... handling %Handling; #REQUIRED
tcc %TCC; #REQUIRED>
<!ELEMENT loose (hop)+>
<!ATTLIST loose
copied CDATA #FIXED "1"
...
... pointer %Digits; #REQUIRED>
<!ELEMENT hop EMPTY>
<!ATTLIST hop
address %IP4Addr; #REQUIRED>
...
... hop
address %IP4Addr; #REQUIRED>
<!ELEMENT strict (hop)+>
<!ATTLIST strict
copied CDATA #FIXED "1"
...
... pointer %Digits; #REQUIRED>
<!ELEMENT record (hop)+>
<!ATTLIST record
copied CDATA #FIXED "0"
...
... flag (0 | 1 | 3) #REQUIRED>
<!ELEMENT tstamp EMPTY>
<!ATTLIST tstamp
time %Digits; #REQUIRED
...
... pad MUST be "0"*
-->
<!ELEMENT padding EMPTY>
<!ATTLIST padding
pad CDATA #REQUIRED>
...
... <!-- the pseudoheader is only included for checksum calculations -->
<!ELEMENT tcp (tcp.pseudoheader?, tcp.header, payload)>
...
... payload)>
<!ELEMENT tcp.header (src, dest, sequence, acknowledgement, offset,
reserved, control, window, checksum ...
... port %Digits; #REQUIRED>
<!ELEMENT sequence EMPTY>
<!-- 0 <= number <= 4294967295 -->
<!ATTLIST sequence
number ...
... sequence
number %Digits; #REQUIRED>
<!ELEMENT acknowledgement EMPTY>
<!-- 0 <= number <= 4294967295 -->
<!ATTLIST acknowledgement
...
... number %Digits; #REQUIRED>
<!ELEMENT offset EMPTY>
<!-- 0 <= number <= 255 -->
<!ATTLIST offset
...
... number %Digits; #REQUIRED>
<!ELEMENT reserved EMPTY>
<!ATTLIST reserved
value CDATA #FIXED "0">
...
... value CDATA #FIXED "0">
<!ELEMENT control EMPTY>
<!ATTLIST control
urg (0|1) #IMPLIED
...
... fin (0|1) #IMPLIED>
<!ELEMENT window EMPTY>
<!-- 0 <= size <= 65,535 -->
<!ATTLIST window
...
... checksum as in ip, but with
the following pseudo-header added into the tcp element:
-->
<!ELEMENT ...
... -->
<!ELEMENT tcp.length EMPTY>
<!ATTLIST tcp.length
value %Digits; #REQUIRED>
...
... value %Digits; #REQUIRED>
<!ELEMENT urgent EMPTY>
<!-- 0 <= pointer <= 65,535 -->
<!ATTLIST urgent
...
... pointer %Digits; #REQUIRED>
<!ELEMENT tcp.options (tcp.end | tcp.noop | tcp.mss)+>
<!ELEMENT ...
... ELEMENT tcp.options (tcp.end | tcp.noop | tcp.mss)+>
<!ELEMENT tcp.end EMPTY>
<!ATTLIST tcp.end
kind CDATA #FIXED "0">
...
... kind CDATA #FIXED "0">
<!ELEMENT tcp.noop EMPTY>
<!ATTLIST tcp.noop
kind CDATA #FIXED "1">
...
... kind CDATA #FIXED "1">
<!ELEMENT tcp.mss EMPTY>
<!ATTLIST tcp.mss
kind CDATA #FIXED "2"
...
... the pseudoheader.
-->
<!ELEMENT udp.length EMPTY>
<!ATTLIST udp.length
value %Digits; #REQUIRED>
...