RPC_GSS_MAX_DATA_LENGTH(3NSL) Networking Services Library Functions

NAME

rpc_gss_max_data_length, rpc_gss_svc_max_data_length - get maximum data
length for transmission

SYNOPSIS

#include <rpc/rpcsec_gss.h>

int rpc_gss_max_data_length(AUTH *handle, int max_tp_unit_len);


int rpc_gss_svc_max_data_length(struct svc_req *req, int max_tp_unit_len);

DESCRIPTION

Performing a security transformation on a piece of data generally
produces data with a different (usually greater) length. For some
transports, such as UDP, there is a maximum length of data which can be
sent out in one data unit. Applications need to know the maximum size a
piece of data can be before it's transformed, so that the resulting data
will still "fit" on the transport. These two functions return that
maximum size.


rpc_gss_max_data_length() is the client-side version;
rpc_gss_svc_max_data_length() is the server-side version.

PARAMETERS

handle
An RPC context handle of type AUTH, returned when a
context is created (for example, by
rpc_gss_seccreate(). Security service and QOP are
bound to this handle, eliminating any need to specify
them.


max_tp_unit_len
The maximum size of a piece of data allowed by the
transport.


req
A pointer to an RPC svc_req structure, containing
information on the context (for example, program
number and credentials).

RETURN VALUES

Both functions return the maximum size of untransformed data allowed, as
an int.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|MT-Level | MT-Safe |
+---------------+-----------------+

SEE ALSO

rpc(3NSL), rpcsec_gss(3NSL), attributes(7)


ONC+ Developer's Guide


February 5, 2002 RPC_GSS_MAX_DATA_LENGTH(3NSL)