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service
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... request-response: A client sends a request
for a service to a server, the request is processed, and the
server responds. For example, a client may ask for the next
...
... server responds. For example, a client may ask for the next
page of a file as the service. The transaction is terminated
by the server ...
...
The protocol is designed to operate on top of a simple unreliable
datagram service, such as is provided by IP.
...
... transport level protocol cannot guarantee the
standard transport level service definition in the presence of an
intruder. In particular, the intruder can interject packets or modify
packets while updating the checksum ...
... Application layer protocols listed above.
If internetwork services are not required, VMTP can be used without the
IP layer, layered directly on top of the ...
...
VMTP provides an efficient, reliable, optionally secure transport
service in the message transaction or request-response model with the
...
... interface on top of VMTP providing a variety of
communication services (Section 2.10.)
- Simple subset implementation for simple clients ...
... request message generated by a client. At
the service interface, a server becomes involved with a transaction by
receiving and accepting the request. A server terminates its
...
... entity group). The primary intended use is to specify the manager for a
particular service that is co-resident with a particular entity, using
the well-known ...
... well-known entity group identifier for the service manager in the
ServerEntityId field and the identifier for the entity ...
...
The VMTP service interface does not directly provide reliable multicast
because it is expensive to provide, rarely needed by applications, and
...
... user-level
nested call is one fewer VMTP service operation; the VMTP module handles
the return to the invoking call directly. The Server may also use this
...
... sent in fewer packets by sending multiple data blocks per packet. We
require that the underlying datagram service support delivery of (at
minimum) the basic 580 octet VMTP ...
... , according to whether the PIC value is set. An
interface is a set of request codes representing one service or module
function. A public interface is one that is to be used in multiple
...
... 0x0500010E - ModifyService(entityId,flags,count,pc,threadlist)->(code,
count)
Modify the service associated with the entity specified
by entityId. The flags may indicate a message service ...
... service associated with the entity specified
by entityId. The flags may indicate a message service
model, in which case the call "count" parameter
indicates the maximum number of queued messages desired;
...
... queued message allowed. Alternatively, the "flags"
parameters indicates the RPC thread service model, in
which case "count" threads are requested, each with an
inital program counter ...
... "flags" parameter are:
1 THREAD_SERVICE - otherwise the message
model.
...
...
In the thread model, the count must be a positive
increment or else 0, which disables the service. Only a
count of 0 terminates currently queued requests or
in-progress request handling.
...
... group identifiers
should be allocated to correspond to the basic services provided by
hosts that are members of the group, not specifically because that
...
... hosts that are members of the group, not specifically because that
service is provided by VMTP. For example, the well-known entity ...
... well-known entity group
identifier for the domain name service should contain as its embedded
Internet host ...
... descriptor, if any. This scheme is attractive if there are client CSR's
associated with a service to allow it to communicate as a client using
VMTP with other ...
... to allow it to communicate as a client using
VMTP with other services.
Finally, a similar structure is used to expand entity ...