<s>
NicheStack	O
is	O
a	O
closed	B-Application
source	I-Application
IPv4	B-Protocol
network	I-Protocol
layer	O
and	O
application	O
implementation	O
for	O
operating	O
systems	O
,	O
written	O
in	O
ANSI	O
"	O
C	B-Language
"	O
and	O
is	O
one	O
of	O
three	O
available	O
from	O
InterNiche	O
Technologies	O
,	O
Inc.	O
,	O
designed	O
for	O
use	O
in	O
embedded	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
Its	O
transport	B-Architecture
layer	I-Architecture
implementation	O
has	O
historical	O
roots	O
in	O
BSD	B-Operating_System
and	O
the	O
IP	B-Protocol
layer	O
was	O
derived	O
from	O
a	O
Carnegie	O
Mellon	O
University	O
(	O
CMU	O
)	O
implementation	O
.	O
</s>
<s>
InterNiche	O
's	O
FTP	B-Protocol
server	I-Protocol
,	O
Telnet	B-Protocol
server	O
,	O
DNS	B-Protocol
client	O
,	O
DHCP	B-Protocol
client	O
,	O
and	O
IGMP	B-Protocol
(	O
v1	O
and	O
v2	O
)	O
components	O
are	O
included	O
in	O
the	O
base	O
software	O
package	O
.	O
</s>
<s>
Supporting	O
a	O
wide	O
variety	O
of	O
physical	O
interfaces	O
,	O
NicheStack	O
's	O
IP	B-Protocol
layer	O
can	O
be	O
configured	O
as	O
a	O
standard	O
client	O
machine	O
,	O
an	O
IP	B-Protocol
router	O
,	O
or	O
a	O
multi-homed	O
server	O
.	O
</s>
<s>
NicheStack	O
IPv4	B-Protocol
provides	O
a	O
protocol	O
platform	O
for	O
InterNiche	O
's	O
optional	O
Point-to-Point	B-Protocol
Protocol	I-Protocol
(	O
PPP	O
)	O
,	O
Web	O
server	O
,	O
DHCP	B-Protocol
server	I-Protocol
,	O
SMTP	B-Protocol
protocols	I-Protocol
and	O
SNMP	B-Protocol
.	O
</s>
<s>
Also	O
available	O
to	O
run	O
on	O
NicheStack	O
are	O
a	O
number	O
of	O
security	O
modules	O
,	O
including	O
SSH	B-Protocol
,	O
IPsec/IKE	O
and	O
two	O
different	O
implementations	O
of	O
SSL	B-Protocol
.	O
</s>
<s>
NicheStack	O
is	O
marketed	O
as	O
a	O
small-footprint	O
,	O
RFC	O
compliant	O
embedded	O
protocol	O
stack	O
,	O
portable	O
to	O
commercial	O
or	O
proprietary	B-Application
non-MMU	O
Operating	O
Systems	O
.	O
</s>
<s>
NicheStack	O
's	O
TCP	O
layer	O
is	O
based	O
on	O
mbufs	O
and	O
BSD	B-Protocol
4.4	I-Protocol
Sockets	I-Protocol
.	O
</s>
<s>
Tunable	O
parameters	O
such	O
as	O
MSS	B-Protocol
(	O
Maximum	B-Protocol
Segment	I-Protocol
Size	I-Protocol
)	O
and	O
the	O
TCP	O
window	O
can	O
be	O
left	O
to	O
runtime	O
logic	O
or	O
be	O
customized	O
by	O
the	O
application	O
.	O
</s>
<s>
IP	B-Protocol
Routing	O
:	O
Routes	O
set	O
via	O
ICMP	O
,	O
SNMP	B-Protocol
,	O
IGP	O
,	O
etc	O
.	O
</s>
