The Transport DTDs (7.2. and 7.3.) build on the definitions in the
Network DTD (7.1.)
The DTDs are referenced by their PubidLiteral and SystemLiteral (from
[XML]) although it is understood that most IPoXML implementations
will not need to pull down the DTD, as it will normally be embedded
in the implementation, and presents something of a catch-22 if you
need to load part of your network protocol over the network.
7.1. IPoXML DTD
<!--
DTD for IP over XML.
Refer to this DTD as:
<!DOCTYPE ip PUBLIC "-//IETF//DTD BLOAT 1.0 IP//EN" "bloat.dtd">
-->
<!--
DTD data types:
Digits [0..9]+
Precedence "NetworkControl | InternetworkControl |
CRITIC | FlashOverride | Flash | Immediate |
Priority | Routine"
IP4Addr "dotted-decimal" notation of [RFC1123]
Class [0..3]
Sec "Unclassified | Confidential | EFTO | MMMM | PROG |
Restricted | Secret | Top Secret | Reserved"
Compartments [0..65535]
Handling [0..65535]
TCC [0..16777216]
-->
<!ENTITY % Digits "CDATA">
<!ENTITY % Precedence "CDATA">
<!ENTITY % IP4Addr "CDATA">
<!ENTITY % Class "CDATA">
<!ENTITY % Sec "CDATA">
<!ENTITY % Compartments "CDATA">
<!ENTITY % Handling "CDATA">
<!ENTITY % TCC "CDATA">
<!ELEMENT ip (header, payload)>
<!ELEMENT header (version, tos, total.length, id, flags, offset, ttl,
protocol, checksum, source, destination, options,
padding)>
<!-- length of header in 32-bit words -->
<!ATTLIST header
length %Digits; #REQUIRED>
<!ELEMENT version EMPTY>
<!-- ip version. SHOULD be "4" -->
<!ATTLIST version
value %Digits; #REQUIRED>
<!ELEMENT tos EMPTY>
<!ATTLIST tos
precedence %Precedence; #REQUIRED
delay (normal | low) #REQUIRED
throughput (normal | high) #REQUIRED
relibility (normal | high) #REQUIRED
reserved CDATA #FIXED "0">
<!ELEMENT total.length EMPTY>
<!--
total length of datagram (header and payload) in octets, MUST be
less than 65,535 (and SHOULD be less than 1024 for IPoXML on local
ethernets).
-->
<!ATTLIST total.length
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 -->
<!ATTLIST flags
reserved CDATA #FIXED "0"
df (may|dont) #REQUIRED
mf (last|more) #REQUIRED>
<!ELEMENT offset EMPTY>
<!-- 0 <= offset <= 8192 measured in 8 octet (64-bit) chunks -->
<!ATTLIST offset
value %Digits; #REQUIRED>
<!ELEMENT ttl EMPTY>
<!-- 0 <= ttl <= 255 -->
<!ATTLIST ttl
value %Digits; #REQUIRED>
<!ELEMENT protocol EMPTY>
<!-- 0 <= protocol <= 255 (per IANA) -->
<!ATTLIST protocol
value %Digits; #REQUIRED>
<!ELEMENT checksum EMPTY>
<!-- 0 <= checksum <= 65535 (over header only) -->
<!ATTLIST checksum
value %Digits; #REQUIRED>
<!ELEMENT source EMPTY>
<!ATTLIST source
address %IP4Addr; #REQUIRED>
<!ELEMENT destination EMPTY>
<!ATTLIST destination
address %IP4Addr; #REQUIRED>
<!ELEMENT options ( end | noop | security | loose | strict | record
| stream | timestamp )*>
<!ELEMENT end EMPTY>
<!ATTLIST end
copied (0|1) #REQUIRED
class CDATA #FIXED "0"
number CDATA #FIXED "0">
<!ELEMENT noop EMPTY>
<!ATTLIST noop
copied (0|1) #REQUIRED
class CDATA #FIXED "0"
number CDATA #FIXED "1">
<!ELEMENT security EMPTY>
<!ATTLIST security
copied CDATA #FIXED "1"
class CDATA #FIXED "0"
number CDATA #FIXED "2"
length CDATA #FIXED "11"
security %Sec; #REQUIRED
compartments %Compartments; #REQUIRED
handling %Handling; #REQUIRED
tcc %TCC; #REQUIRED>
<!ELEMENT loose (hop)+>
<!ATTLIST loose
copied CDATA #FIXED "1"
class CDATA #FIXED "0"
number CDATA #FIXED "3"
length %Digits; #REQUIRED
pointer %Digits; #REQUIRED>
<!ELEMENT hop EMPTY>
<!ATTLIST hop
address %IP4Addr; #REQUIRED>
<!ELEMENT strict (hop)+>
<!ATTLIST strict
copied CDATA #FIXED "1"
class CDATA #FIXED "0"
number CDATA #FIXED "9"
length %Digits; #REQUIRED
pointer %Digits; #REQUIRED>
<!ELEMENT record (hop)+>
<!ATTLIST record
copied CDATA #FIXED "0"
class CDATA #FIXED "0"
number CDATA #FIXED "7"
length %Digits; #REQUIRED
pointer %Digits; #REQUIRED>
<!ELEMENT stream EMPTY>
<!-- 0 <= id <= 65,535 -->
<!ATTLIST stream
copied CDATA #FIXED "1"
class CDATA #FIXED "0"
number CDATA #FIXED "8"
length CDATA #FIXED "4"
id %Digits; #REQUIRED>
<!ELEMENT timestamp (tstamp)+>
<!-- 0 <= oflw <=15 -->
<!ATTLIST timestamp
copied CDATA #FIXED "0"
class CDATA #FIXED "2"
number CDATA #FIXED "4"
length %Digits; #REQUIRED
pointer %Digits; #REQUIRED
oflw %Digits; #REQUIRED
flag (0 | 1 | 3) #REQUIRED>
<!ELEMENT tstamp EMPTY>
<!ATTLIST tstamp
time %Digits; #REQUIRED
address %IP4Addr; #IMPLIED>
<!--
padding to bring header to 32-bit boundary.
pad MUST be "0"*
-->
<!ELEMENT padding EMPTY>
<!ATTLIST padding
pad CDATA #REQUIRED>
<!-- payload MUST be encoded as base-64 [RFC2045], as modified
by section 2.1 of this RFC -->
<!ELEMENT payload (CDATA)>
7.2. TCPoXML DTD
<!--
DTD for TCP over XML.
Refer to this DTD as:
<!DOCTYPE tcp PUBLIC "-//IETF//DTD BLOAT 1.0 TCP//EN" "bloat.dtd">
-->
<!-- the pseudoheader is only included for checksum calculations -->
<!ELEMENT tcp (tcp.pseudoheader?, tcp.header, payload)>
<!ELEMENT tcp.header (src, dest, sequence, acknowledgement, offset,
reserved, control, window, checksum, urgent,
tcp.options, padding)>
<!ELEMENT src EMPTY>
<!-- 0 <= port <= 65,535 -->
<!ATTLIST src
port %Digits; #REQUIRED>
<!ELEMENT dest EMPTY>
<!-- 0 <= port <= 65,535 -->
<!ATTLIST dest
port %Digits; #REQUIRED>
<!ELEMENT sequence EMPTY>
<!-- 0 <= number <= 4294967295 -->
<!ATTLIST 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">
<!ELEMENT control EMPTY>
<!ATTLIST control
urg (0|1) #IMPLIED
ack (0|1) #IMPLIED
psh (0|1) #IMPLIED
rst (0|1) #IMPLIED
syn (0|1) #IMPLIED
fin (0|1) #IMPLIED>
<!ELEMENT window EMPTY>
<!-- 0 <= size <= 65,535 -->
<!ATTLIST window
size %Digits; #REQUIRED>
<!--
checksum as in ip, but with
the following pseudo-header added into the tcp element:
-->
<!ELEMENT tcp.pseudoheader (source, destination, protocol,
tcp.length)>
<!--
tcp header + data length in octets. does not include the size of
the pseudoheader.
-->
<!ELEMENT tcp.length EMPTY>
<!ATTLIST tcp.length
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 tcp.end EMPTY>
<!ATTLIST tcp.end
kind CDATA #FIXED "0">
<!ELEMENT tcp.noop EMPTY>
<!ATTLIST tcp.noop
kind CDATA #FIXED "1">
<!ELEMENT tcp.mss EMPTY>
<!ATTLIST tcp.mss
kind CDATA #FIXED "2"
length CDATA #FIXED "4"
size %Digits; #REQUIRED>
7.3. UDPoXML DTD
<!--
DTD for UDP over XML.
Refer to this DTD as:
<!DOCTYPE udp PUBLIC "-//IETF//DTD BLOAT 1.0 UDP//EN" "bloat.dtd">
-->
<!ELEMENT udp (udp.pseudoheader?, udp.header, payload)>
<!ELEMENT udp.header (src, dest, udp.length, checksum)>
<!ELEMENT udp.pseudoheader (source, destination, protocol,
udp.length)>
<!--
udp header + data length in octets. does not include the size of
the pseudoheader.
-->
<!ELEMENT udp.length EMPTY>
<!ATTLIST udp.length
value %Digits; #REQUIRED>
