Example: TI-RPC expert-level service API

The expert level allows the programmer to specify Send and Receive buffer sizes for services. Calling svc_tli_create() creates the service handle, but it does not register or bind it with the rpcbind daemon. The programmer must call svc_reg() before the service works properly. Similar to the intermediate level, you have the option to use the network selection APIs to retrieve the transport information for the service.

#include <stdio.h>
#include <netconfig.h>
#include <rpc/rpc.h>
#include <errno.h>
#include "myapp.h"

int main(int argc, char *argv[]) {

	struct netconfig *nconf; /* pointer to nettype data */
	SVCXPRT *svc;            /* pointer to service handle */
	bool_t rslt;             /* return value for svc_reg() */

	/* unregister any existing copy of this service */
	/* (void)svc_unreg(program, version) */
	svc_unreg(PROGNUM, VERSNUM);

	/* (struct netconfig *)getnetconfigent(nettype) */
	nconf = getnetconfigent(NETTYPE);

	/* check for errors calling getnetconfigent() */
	if (nconf == (struct netconfig *)NULL) {
		/* print error messages and exit */
		fprintf(stderr, "Error calling getnetconfigent(%s)\n", NETTYPE);
		fprintf(stderr, "errno: %d\n", errno);
		return 1;
		}

	/* (SVCXPRT *)svc_tli_create(filedes, netconfig, bindaddr, sendsz, recvsz) */
	svc = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);

	/* check for errors calling svc_tli_create() */
	if (svc == (SVCXPRT *)NULL) {
		/* print error messages and exit */
		fprintf(stderr, "Error calling %s.\n", "svc_tli_create");
		fprintf(stderr, "errno: %d\n", errno);
		return 1;
		}

	/* (bool_t)svc_reg(svcxprt, prognum, versnum, dispatch, netconf) */	
	rslt = svc_reg(svc, PROGNUM, VERSNUM, myapp_dispatch, nconf);

	/* check for errors calling svc_reg() */
	if (rslt == FALSE) {
		/* print error messages and exit */
		fprintf(stderr, "Error calling svc_reg\n");
		fprintf(stderr, "PROG: %lu\nVERS: %lu\tNET: %s\n", 
				PROGNUM, VERSNUM, NETTYPE);
		fprintf(stderr, "errno: %d\n", errno);
		return 1;
		}

	/* this should loop indefinitely waiting for client connections */
	svc_run();

	/* if we get here, svc_run() returned */
	fprintf(stderr, "svc_run() returned.  ERROR has occurred.\n");
	fprintf(stderr, "errno: %d\n", errno);

	/* clean up by unregistering.  then, exit */
	svc_unreg(PROGNUM, VERSNUM);

	return 1;

} /* end of main() */