/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1998-2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <memory.h>
#include <stropts.h>
#include <netconfig.h>
#include <stropts.h>
#include <sys/termios.h>
#include <syslog.h>
#include <rpcsvc/bootparam_prot.h>

#include "bootparam_private.h"

#define _RPCSVC_CLOSEDOWN 120

int debug = 0;

static void bootparamprog_1(struct svc_req *, register SVCXPRT *);
static void closedown(int);

static int server_child = 0;    /* program was started by another server */
static int _rpcsvcdirty;        /* Still serving ? */

int
main(int argc, char *argv[])
{
        pid_t pid;
        int c;
        char *progname = argv[0];
        int connmaxrec = RPC_MAXDATASIZE;

        while ((c = getopt(argc, argv, "d")) != -1)
                switch ((char)c) {
                case 'd':
                        debug++;
                        break;
                default:
                        (void) fprintf(stderr, "usage: %s [-d]\n", progname);
                        exit(EXIT_FAILURE);
                }


        /*
         * Set non-blocking mode and maximum record size for
         * connection oriented RPC transports.
         */
        if (!rpc_control(RPC_SVC_CONNMAXREC_SET, &connmaxrec)) {
                msgout("unable to set maximum RPC record size");
        }

        /*
         * If stdin looks like a TLI endpoint, we assume
         * that we were started by a port monitor. If
         * t_getstate fails with TBADF, this is not a
         * TLI endpoint.
         */
        if (t_getstate(0) != -1 || t_errno != TBADF) {
                char *netid;
                struct netconfig *nconf = NULL;
                SVCXPRT *transp;
                int pmclose;

                if ((netid = getenv("NLSPROVIDER")) == NULL) {
                        if (debug)
                                msgout("cannot get transport name");
                } else if ((nconf = getnetconfigent(netid)) == NULL) {
                        if (debug)
                                msgout("cannot get transport info");
                }
                pmclose = (t_getstate(0) != T_DATAXFER);
                if ((transp = svc_tli_create(0, nconf, NULL, 0, 0)) == NULL) {
                        msgout("cannot create server handle");
                        exit(EXIT_FAILURE);
                }
                if (nconf)
                        freenetconfigent(nconf);
                if (!svc_reg(transp, BOOTPARAMPROG, BOOTPARAMVERS,
                    bootparamprog_1, 0)) {
                        msgout("unable to register (BOOTPARAMPROG, "
                            "BOOTPARAMVERS).");
                        exit(EXIT_FAILURE);
                }
                if (pmclose) {
                        (void) signal(SIGALRM, closedown);
                        (void) alarm(_RPCSVC_CLOSEDOWN);
                }

                svc_run();
                exit(EXIT_FAILURE);
                /* NOTREACHED */
        }

        /*
         * run this process in the background only if it was started from
         * a shell and the debug flag was not given.
         */
        if (!server_child && !debug) {
                pid = fork();
                if (pid < 0) {
                        perror("cannot fork");
                        exit(EXIT_FAILURE);
                }
                if (pid)
                        exit(EXIT_SUCCESS);

                closefrom(0);
                (void) setsid();
        }

        /*
         * messges go to syslog if the program was started by
         * another server, or if it was run from the command line without
         * the debug flag.
         */
        if (server_child || !debug)
                openlog("bootparam_prot", LOG_PID, LOG_DAEMON);

        if (debug) {
                if (debug == 1)
                        msgout("in debug mode.");
                else
                        msgout("in debug mode (level %d).", debug);
        }

        if (!svc_create(bootparamprog_1, BOOTPARAMPROG, BOOTPARAMVERS,
                        "netpath")) {
                msgout("unable to create (BOOTPARAMPROG, BOOTPARAMVERS) "
                    "for netpath.");
                exit(EXIT_FAILURE);
        }

        svc_run();
        msgout("svc_run returned");
        return (EXIT_FAILURE);
}

static void
bootparamprog_1(struct svc_req *rqstp, register SVCXPRT *transp)
{
        union {
                bp_whoami_arg bootparamproc_whoami_1_arg;
                bp_getfile_arg bootparamproc_getfile_1_arg;
        } argument;
        char *result;
        bool_t (*xdr_argument)(), (*xdr_result)();
        char *(*local)();

        _rpcsvcdirty = 1;
        switch (rqstp->rq_proc) {
        case NULLPROC:
                (void) svc_sendreply(transp, xdr_void, (char *)NULL);
                _rpcsvcdirty = 0;
                return;

        case BOOTPARAMPROC_WHOAMI:
                xdr_argument = xdr_bp_whoami_arg;
                xdr_result = xdr_bp_whoami_res;
                local = (char *(*)()) bootparamproc_whoami_1;
                break;

        case BOOTPARAMPROC_GETFILE:
                xdr_argument = xdr_bp_getfile_arg;
                xdr_result = xdr_bp_getfile_res;
                local = (char *(*)()) bootparamproc_getfile_1;
                break;

        default:
                svcerr_noproc(transp);
                _rpcsvcdirty = 0;
                return;
        }
        (void) memset((char *)&argument, 0, sizeof (argument));
        if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument)) {
                svcerr_decode(transp);
                _rpcsvcdirty = 0;
                return;
        }
        result = (*local)(&argument, rqstp);
        if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
                svcerr_systemerr(transp);
        }
        if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument)) {
                msgout("unable to free arguments");
                exit(EXIT_FAILURE);
        }
        _rpcsvcdirty = 0;
}

/*PRINTFLIKE1*/
void
msgout(char *fmt, ...)
{
        va_list ap;

        va_start(ap, fmt);
        /*
         * messges go to syslog if the program was started by
         * another server, or if it was run from the command line without
         * the debug flag.
         */
        if (server_child || !debug)
                vsyslog(LOG_ERR, fmt, ap);
        else {
                (void) vfprintf(stderr, fmt, ap);
                (void) fputc('\n', stderr);
        }
        va_end(ap);
}

/* ARGSUSED */
static void
closedown(int sig)
{
        if (_rpcsvcdirty == 0) {
                int size;
                int i, openfd;
                struct t_info tinfo;

                if (!t_getinfo(0, &tinfo) && (tinfo.servtype == T_CLTS))
                        exit(EXIT_SUCCESS);
                size = svc_max_pollfd;
                for (i = 0, openfd = 0; i < size && openfd < 2; i++)
                        if (svc_pollfd[i].fd >= 0)
                                openfd++;
                if (openfd <= 1)
                        exit(EXIT_SUCCESS);
        }
        (void) alarm(_RPCSVC_CLOSEDOWN);
}