1. Remote Network Driver Interface Specification
Remote Network Driver Interface Specification and / or RNDIS is definitely an extension of the
time - tested as well as the nicely - recognized NDIS architecture. The NDIS identifies properly
the perform - call interface for the NDIS miniport drivers which are device - specified. This
stated interface also defines the primitives so that it might probably ship as well as obtain
knowledge, as well as to question and to put configuration primitives as well as data.
The Remote network driver interface specification leverages the NDIS by way of the definition
of a message wrapping for NDIS miniport driver interface; hence, the moving of the NDIS -
dealing with code from the miniport driver and into system itself. Via this, the Remote NDIS will
allow for a huge range of functionality and the efficiency levels of a device. There are many
identified advantages of using the Remote network driver interface specification. The first is its
extensibility with none modifications in the message transport components which might be bus
- specific. One other profit is its potential to support many standards over many buses in a
shorter interval of time. It is usually considered as the motive force structure, which has already
been proven efficient for the bus device fashions which might be located externally and also for
networking. The Remote NDIS gadgets additionally support the worth - added mechanisms
which are present within the NDIS network stack.
The Remote NDIS additionally has its requirements on the decrease - layer drivers, along with
the communication channel; plus these are being used to communicate involving the RNDIS
device and also the host. The first one could be that the control channel must be reliable and
must ensure the sequenced delivery. It is needed for all of the communication, apart from
transmissions from the network data packets.
As mentioned, all wants the control messages, except the
REMOTE_NDIS_INDICATE_STATUS_MSG and the REMOTE_NDIS_HALT_MSG. The device should

2. respond throughout the time that is thought-about as the timeout interval that's specified for
each of the bus. The info channel can also be getting used completely for transmission of the
network knowledge packets. It could comprise of a number of sub - channels as they're
outlined for every of the suitable bus.
All the control and the info channels are being initialized and set - up as they're specified for his
or her appropriate bus. The host then sends in a REMOTE_NDIS_INITIALIZE_MSG message unto
the Remote network machine interface specification device. The Remote NDIS system can
present the information about the kind, whether or not it is connectionless or it is connection -
oriented. The Remote NDIS system can discard all of the outstanding requests and packets that
are part of the reset process. It also might reset among the hardware components;
nevertheless, it keeps the entire communication channels intact.
The host, the NDIS miniport driver are being halted and eliminated, and the brand new instance
is added and started. All of the bus - degree and the Remote network driver interface
specification initialization is will likely then be re-executed. The Remote NDIS may reboot itself
every time a vital gadget failure occurs.
Network Driver Interface Specification
Distant Network Driver Interface Specification or RNDIS is an extension of the time - examined
and the effectively - understood NDIS architecture. The NDIS defines well the perform - call
interface for the NDIS miniport drivers which can be gadget - specified. This said interface
additionally defines the primitives in order that it can ship and obtain knowledge, as well as to
query and to set configuration primitives as well as statistics.
The distant network driver interface specification leverages the NDIS by the definition of a
message wrapping for NDIS miniport driver interface; hence, the shifting of the NDIS - handling

3. code from the miniport driver and into gadget itself. By this, the remote NDIS will allow for a
huge vary of performance and the efficiency ranges of a device. There are many known
advantages of using the distant network driver interface specification. One is its extensibility
without any changes in the message transport mechanisms which can be bus - specific. Another
profit is its ability to support many protocols over many buses in a shorter interval of time. It is
usually thought of as the driving force structure, which has already been confirmed effective for
the bus machine fashions which might be positioned externally and in addition for networking.
The remote NDIS devices additionally assist the value - added mechanisms which are existing in
the NDIS network stack.
The distant NDIS also has its requirements on the decrease - layer drivers, as well as the
communication channel; and these are getting used to communicate between the RNDIS
system and the host. The first one is that the control channel needs to be dependable and
should make sure the sequenced delivery. It is needed for all the communication, apart from
transmissions of the network knowledge packets.
As mentioned, all needs the control messages, except the
REMOTE_NDIS_INDICATE_STATUS_MSG and the REMOTE_NDIS_HALT_MSG. The system ought
to reply within the time that's considered as the timeout period that's specified for each of the
bus. The info channel can also be being used solely for transmission of the network information
packets. It may comprise of a number of sub - channels as they are outlined for every of the
appropriate bus.
All the control and the info channels are being initialized and set - up as they are specified for
his or her appropriate bus. The host then sends in a REMOTE_NDIS_INITIALIZE_MSG message
unto the remote network machine interface specification device. The distant NDIS device can
provide the details about the type, whether it's connectionless or it's connection - oriented. The
distant NDIS gadget can discard all of the outstanding requests and packets which can be part

4. of the reset process. It additionally may reset among the hardware elements; however, it
retains all of the communication channels intact.
The host, the NDIS miniport driver are being halted and removed, and the brand new occasion
is added and started. The entire bus - level and the distant network driver interface
specification initialization is will be re - executed. The distant NDIS may reboot itself when a
critical machine failure occurs.