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RPC_SVC_CALLS(3)
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svc_dg_enablecache, svc_exit, svc_fdset, svc_freeargs, svc_getargs,
svc_getreq_common, svc_getreq_poll, svc_getreqset, svc_getrpccaller,
svc_pollset, svc_run, svc_sendreply - library routines for RPC servers
Standard C Library (libc, -lc)
#include <rpc/rpc.h>
int
svc_dg_enablecache(SVCXPRT *xprt, const unsigned cache_size);
void
svc_exit(void);
bool_t
svc_freeargs(const SVCXPRT *xprt, const xdrproc_t inproc, caddr_t in);
bool_t
svc_getargs(const SVCXPRT *xprt, const xdrproc_t inproc, caddr_t in);
void
svc_getreq_common(const int fd);
void
svc_getreq_poll(struct pollfd *pfdp, const int pollretval);
void
svc_getreqset(fd_set * rdfds);
struct netbuf *
svc_getrpccaller(const SVCXPRT *xprt);
struct sockcred *
__svc_getcallercreds(const SVCXPRT *xprt);
struct pollfd svc_pollset[FD_SETSIZE];
void
svc_run(void);
bool_t
svc_sendreply(const SVCXPRT *xprt, const xdrproc_t outproc,
const caddr_t *out);
These routines are part of the RPC library which allows C language programs
to make procedure calls on other machines across the network.
These routines are associated with the server side of the RPC mechanism.
Some of them are called by the server side dispatch function, while others
(such as svc_run()) are called when the server is initiated.
See rpc(3) for the definition of the SVCXPRT data structure.
svc_dg_enablecache() This function allocates a duplicate request cache
for the service endpoint xprt, large enough to
hold cache_size entries. Once enabled, there is
no way to disable caching. This routine returns
0 if space necessary for a cache of the given
size was successfully allocated, and 1 otherwise.
svc_exit() This function when called by any of the RPC
server procedure or otherwise, causes svc_run()
to return.
As currently implemented, svc_exit() zeroes the
svc_fdset global variable. If RPC server activity
is to be resumed, services must be reregistered
with the RPC library either through one of the
rpc_svc_create() functions, or using
xprt_register(). svc_exit() has global scope and
ends all RPC server activity. fd_set svc_fdset A
global variable reflecting the RPC server's read
file descriptor bit mask; it is suitable as a
parameter to the select(2) system call. This is
only of interest if service implementors do not
call svc_run(), but rather do their own asynchronous
event processing. This variable is
read-only (do not pass its address to
select(2)!), yet it may change after calls to
svc_getreqset() or any creation routines.
svc_freeargs() A function macro that frees any data allocated by
the RPC/XDR system when it decoded the arguments
to a service procedure using svc_getargs(). This
routine returns TRUE if the results were successfully
freed, and FALSE otherwise.
svc_getargs() A function macro that decodes the arguments of an
RPC request associated with the RPC service
transport handle xprt. The parameter in is the
address where the arguments will be placed;
inproc is the XDR routine used to decode the
arguments. This routine returns TRUE if decoding
succeeds, and FALSE otherwise.
svc_getreq_common() This routine is called to handle a request on the
given file descriptor.
svc_getreq_poll() This routine is only of interest if a service
implementor does not call svc_run(), but instead
implements custom asynchronous event processing.
It is called when poll(2) has determined that an
RPC request has arrived on some RPC file descriptors;
pollretval() is the return value from
poll(2) and pfdp is the array of pollfd structures
on which the poll(2) was done. It is
assumed to be an array large enough to contain
the maximal number of descriptors allowed.
svc_getreqset() This routine is only of interest
if a service implementor does not call svc_run(),
but instead implements custom asynchronous event
processing. It is called when poll(2) has determined
that an RPC request has arrived on some RPC
file descriptors; rdfds is the resultant read
file descriptor bit mask. The routine returns
when all file descriptors associated with the
value of rdfds have been serviced.
svc_getrpccaller() The approved way of getting the network address
of the caller of a procedure associated with the
RPC service transport handle xprt.
__svc_getcallercreds() NetBSD and thus not portable. This macro returns
a pointer to a sockcred structure, defined in
<sys/socket.h> ,
identifying the calling client. This only works
if the client is calling the server over an
AF_LOCAL socket.
struct pollfd svc_pollset[FD_SETSIZE];
svc_pollset is an array of pollfd structures
derived from svc_fdset[]. It is suitable as a
parameter to the poll(2) system call. The
derivation of svc_pollset from svc_fdset is made
in the current implementation in svc_run(). Service
implementors who do not call svc_run() and
who wish to use this array must perform this
derivation themselves.
svc_run() This routine never returns. It waits for RPC
requests to arrive, and calls the appropriate
service procedure using svc_getreq_poll() when
one arrives. This procedure is usually waiting
for the poll(2) system call to return.
svc_sendreply() Called by an RPC service's dispatch routine to
send the results of a remote procedure call. The
parameter xprt is the request's associated transport
handle; outproc is the XDR routine which is
used to encode the results; and out is the
address of the results. This routine returns
TRUE if it succeeds, FALSE otherwise.
poll(2), rpc(3), rpc_svc_create(3), rpc_svc_err(3), rpc_svc_reg(3)
BSD May 3, 1993 BSD
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