NAME

rpc_svc_reg:  svc_freeargs, svc_getargs, svc_getreqset, svc_getrpccaller, svc_run, svc_sendreply − library routines for RPC servers

DESCRIPTION

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. 

Routines

#include <rpc/rpc.h>

int
svc_freeargs(const SVCXPRT ∗xprt, const xdrproc_t inproc, char ∗in);

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 1 if the results were successfully freed, and 0 otherwise. 

int
svc_getargs(const SVCXPRT ∗xprt, const xdrproc_t inproc, caddr_t ∗in);

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 1 if decoding succeeds, and 0 otherwise. 

void
svc_getreqset(fd_set ∗rdfds);

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 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

struct netbuf ∗
svc_getrpccaller(const SVCXPRT ∗xprt);

The approved way of getting the network address of the caller of a procedure associated with the RPC service transport handle xprt. 

void
svc_run(void);

This routine never returns.  It waits for RPC requests to arrive, and calls the appropriate service procedure using svc_getreqset when one arrives.  This procedure is usually waiting for a poll library call to return. 

int
svc_sendreply(const SVCXPRT ∗xprt, const xdrproc_t outproc,
const caddr_t ∗out);

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 1 if it succeeds, 0 otherwise. 

SEE ALSO

poll(2), rpc(3N), rpc_svc_calls(3N), rpc_svc_create(3N), rpc_svc_err(3N)