Eicon Networks Eicon 1550 Manual de usuario descargar pdf (Pagina 9)

US

2006/0120402

A1

understood

by

the

skilled

addressee

that

the

encapsulating

comprises

performing

any

ISO

Layer

2

operations

that

are

required

for

transmitting the data

packet

over

the

alternative

data

packet

netWork

34.

[0039]

Furthermore,

the

encapsulating/decapsulating

unit

46

of

the

driver

52

is

intended

to

decapsulate

data

packets

received

from

the

alternative

data

packet

netWork

interface

44

into

data

packets

that

are

suitable

to

be

used

by

the

X25

application.

[0040]

The

X25

virtual

netWork

interface

card

48

of

the

driver

52

is

a

softWare

module

Which

is

intended

to

simulate

the

presence

of

a

X25

netWork

interface

in

the

operating

system of

the

third

host

42.

The

virtual

interface

netWork

card

48

provides

support

for

X25

sockets

and

Eicon

ECNCB

(Eicon

X25

Toolkit)

APIs

for

end-user

applications

to

be

able

to

make

use

of

it.

[0041]

NoW

referring

to

FIG.

3,

there

is

shoWn

a

?rst

embodiment

of

the

operation

of

a

driver

(such

as

32

or

52

from

FIG.

2).

In

this

embodiment,

a

host

is

running

a

netWork

application

functioning

according

to

a

?rst

given

data

packet

protocol.

The

host

is

connected

to

a

netWork

operating

according

to

a

second

given

data

packet

protocol

using

a

physical

netWork

interface.

[0042]

According

to step

62,

a

data

packet

is

received

by

the

driver.

[0043]

According

to step

64,

a

test

is

performed

in

order

to

?nd

out

if

the

data

packet

is

received

from

the

application

or

from

the

physical

netWork

interface.

[0044]

In

the

case

Where

the

data

packet

is

received

from

the

application

and

according

to step

70,

the

received

data

packet

is

encapsulated

using

an

encapsulation/decapsulation

unit

comprised

in

the

driver

according

to

the

second

given

protocol

to

be

used

in

the

data

netWork.

[0045]

According

to

step

72,

the

encapsulated

data

packet

is

provided

to

a

physical

netWork

interface.

The

physical

netWork

interface

is

adapted

to

transmit data

to

the

data

netWork.

The

data

packet

is

then

transmitted

over

the

data

netWork

via the

physical

netWork

interface.

[0046]

In

the

case

Where

the

data

packet

is

received

from

the

netWork

interface

and

according

to

step

66,

the

received

data

packet

is

decapsulated using

the

encapsulation/decap

sulation

unit

of

the

driver.

The

data

packet

is

decapsulated

according

to

the

?rst

given

protocol

used

by

the

application.

[0047]

According

to

step 68,

the

decapsulated

data

packet

is

provided

to

the

application.

[0048]

NoW

referring

to

FIG.

4,

there

is

shoWn

another

embodiment

Where

a

host,

running

an

X25

application,

is

connected

to

a

TCP/IP

netWork

using

a

TCP/IP

netWork

interface.

[0049]

According

to

step

80,

a

data

packet

is

received.

[0050]

According

to step

82,

a

test

is

performed

in

order

to

?nd

out

if

the

data

packet

is

an

X25

packet

or

a

TCP/IP

packet.

If

the data

packet

is

coming

from

the

X25

virtual

netWork

interface

card,

it

is

treated

as

a

X25

packet

and,

consequently

it

is

encapsulated

and

forWarded

via the

TCP/

IP

session

to

the

remote

site.

If

the

packet

is

coming

from

a

real

interface

through

the

system

IP

stack

With

the

system’s

Jun.

8,

2006

destination

IP

address

and

port,

the

packet

is

decapsulated

and

forWarded

to

the

application

via the

virtual

NIC.

[0051]

In

fact,

in

the

case

Where

the data

packet

is

a

TCP/IP

data

packet

and

according

to

step

84,

the

TCP/IP

data

packet

is

decapsulated

in

a

data

packet.

The

decapsu

lated

data

packet

comprises

a

X25

data packet.

[0052]

According

to step

86,

the

X25

data

packet

is

provided

to

the

X25

application.

[0053]

Furthermore,

in

the

case

Where

the

data

packet

is

an

X25

data

packet

and

according

to

step

88,

the

TCP/IP

data

packet

is

encapsulated

in

a

data

packet.

The

encapsulated

data

packet

comprises

a

TCP/IP

data

packet.

[0054]

According

to

step

90,

the

encapsulated

data

packet

is

provided

to

the

TCP/IP

netWork

interface.

[0055]

NoW

referring

to

FIG.

5,

there

is

shoWn

an

example

of

a

host

101

running

an

X25

application

and

communicating

With

another

X25

application

over

a

TCP/IP

netWork

Which

is

the

Internet

100.

[0056]

The

host

101

comprises

a

user

interface

106,

a

display

unit

108,

a

data

packet

netWork

interface

102,

a

processing

unit

104 and

a

memory

110.

[0057]

The

memory

110

comprises

a

driver

comprising

an

X25

virtual

netWork

interface

card

112

and

an

encapsulat

ing/decapsulating

unit

114,

and

an

X25

application

116.

The

memory

is

connected

to

the

processing

unit

104.

More

precisely,

the

processing

unit

104

provides

a

signal

to

the

memory

110

and

receives

a

signal

to

retrieve

from

the

memory

110.

[0058]

The

user

interface

106

is

adapted

to

provide

an

interface

to

an

operator

of

the

host

101.

The

user

interface

106

is

connected

to

the

processing

unit

104

of

the

host

101.

The

user

interface

106

may

be

at

least

one

of

a

mouse,

a

keyboard

or

the

like.

Preferably,

the

user

interface

comprises

a

keyboard

and

a

mouse.

It

should

be

appreciated

that

such

system,

depending

on

the

end-user

application

may

Work

in

unattended

mode

Without

any

user

interface.

[0059]

The

display

108

is

adapted

to

display

a

visual

signal

to

an

operator

of

the

host

101.

The

display

receives

a

display

signal

Which

is

provided

by

the

processing

unit

104.

The

display

108

may

be

anyone

of

a

CRT

display,

a

plasma

display

or

the

like.

In the

preferred

embodiment,

the

display

108

comprises

a

Cathode

Ray

Tube

(CRT)

display.

It

should

be

appreciated

that

such

system,

depending

on

the

end-user

application

may

Work

in

unattended

mode

Without

any

user

interface.

[0060]

The

data

packet

netWork

interface

102

is

a

physical

netWork

interface

adapted

for

providing

a

netWork

connec

tion

to

the

host 101.

The

data

packet

netWork

interface

102

receives

a data

packet

to

transmit

from

the

processing

unit

104

and

provides

at

least

one

data

packet

to

the

intemet

100.

The

data

packet

netWork

interface

102

further

receives

data

packets

from

the

intemet

100

and

provides

a

received

data

packet

to

the

processing

unit

104.

In

the

preferred

embodi

ment,

the data

packet

netWork

interface

102

comprises

an

Ethernet

interface

using

TCP/IP

protocol

stack.

[0061]

The

processing

unit

104

is

adapted

for

processing

data

according

to

the

embodiment

disclosed

in

FIG.

4.

1 2 3 4 5 6 7 8 9 10

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