/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 *
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

#include <afsconfig.h>
#include <afs/param.h>
#include <afs/stds.h>

#include <roken.h>

#ifdef AFS_NT40_ENV
#include <WINNT/afsevent.h>
#endif

#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif

#include <rx/xdr.h>
#include <rx/rx.h>
#include <rx/rx_globals.h>
#include <rx/rxstat.h>
#include <afs/cmd.h>
#include <afs/cellconfig.h>
#include <afs/keys.h>
#include <afs/auth.h>
#include <afs/audit.h>
#include <afs/com_err.h>
#include <lock.h>
#include <ubik.h>
#include <afs/afsutil.h>

#include "vlserver.h"
#include "vlserver_internal.h"

#define MAXLWP 16
struct afsconf_dir *vldb_confdir = 0;	/* vldb configuration dir */
int lwps = 9;

struct vldstats dynamic_statistics;
struct ubik_dbase *VL_dbase;
afs_uint32 rd_HostAddress[MAXSERVERID + 1];
afs_uint32 wr_HostAddress[MAXSERVERID + 1];

static void *CheckSignal(void*);
int LogLevel = 0;
int smallMem = 0;
int rxJumbograms = 0;		/* default is to not send and receive jumbo grams */
int rxMaxMTU = -1;
afs_int32 rxBind = 0;
int rxkadDisableDotCheck = 0;

#define ADDRSPERSITE 16         /* Same global is in rx/rx_user.c */
afs_uint32 SHostAddrs[ADDRSPERSITE];

static void
CheckSignal_Signal(int unused)
{
#if defined(AFS_PTHREAD_ENV)
    CheckSignal(0);
#else
    IOMGR_SoftSig(CheckSignal, 0);
#endif
}

static void *
CheckSignal(void *unused)
{
    int i, errorcode;
    struct vl_ctx ctx;

    if ((errorcode =
	Init_VLdbase(&ctx, LOCKREAD, VLGETSTATS - VL_LOWEST_OPCODE)))
	return (void *)(intptr_t)errorcode;
    VLog(0, ("Dump name hash table out\n"));
    for (i = 0; i < HASHSIZE; i++) {
	HashNDump(&ctx, i);
    }
    VLog(0, ("Dump id hash table out\n"));
    for (i = 0; i < HASHSIZE; i++) {
	HashIdDump(&ctx, i);
    }
    return ((void *)(intptr_t)ubik_EndTrans(ctx.trans));
}				/*CheckSignal */


/* Initialize the stats for the opcodes */
void
initialize_dstats(void)
{
    int i;

    dynamic_statistics.start_time = (afs_uint32) time(0);
    for (i = 0; i < MAX_NUMBER_OPCODES; i++) {
	dynamic_statistics.requests[i] = 0;
	dynamic_statistics.aborts[i] = 0;
    }
}

/* check whether caller is authorized to manage RX statistics */
int
vldb_rxstat_userok(struct rx_call *call)
{
    return afsconf_SuperUser(vldb_confdir, call, NULL);
}

/* Main server module */

#include "AFS_component_version_number.c"

enum optionsList {
    OPT_noauth,
    OPT_smallmem,
    OPT_auditlog,
    OPT_auditiface,
    OPT_config,
    OPT_debug,
    OPT_database,
    OPT_logfile,
    OPT_threads,
    OPT_syslog,
    OPT_peer,
    OPT_process,
    OPT_nojumbo,
    OPT_jumbo,
    OPT_rxbind,
    OPT_rxmaxmtu,
    OPT_trace,
    OPT_dotted
};

int
main(int argc, char **argv)
{
    afs_int32 code;
    afs_uint32 myHost;
    struct rx_service *tservice;
    struct rx_securityClass **securityClasses;
    afs_int32 numClasses;
    struct afsconf_dir *tdir;
    struct ktc_encryptionKey tkey;
    struct afsconf_cell info;
    struct hostent *th;
    char hostname[VL_MAXNAMELEN];
    int noAuth = 0;
    char clones[MAXHOSTSPERCELL];
    afs_uint32 host = ntohl(INADDR_ANY);
    struct cmd_syndesc *opts;

    char *vl_dbaseName;
    char *configDir;
    char *logFile;

    char *auditFileName = NULL;
    char *interface = NULL;
    char *optstring = NULL;

#ifdef	AFS_AIX32_ENV
    /*
     * The following signal action for AIX is necessary so that in case of a
     * crash (i.e. core is generated) we can include the user's data section
     * in the core dump. Unfortunately, by default, only a partial core is
     * generated which, in many cases, isn't too useful.
     */
    struct sigaction nsa;

    rx_extraPackets = 100;	/* should be a switch, I guess... */
    sigemptyset(&nsa.sa_mask);
    nsa.sa_handler = SIG_DFL;
    nsa.sa_flags = SA_FULLDUMP;
    sigaction(SIGABRT, &nsa, NULL);
    sigaction(SIGSEGV, &nsa, NULL);
#endif
    osi_audit_init();

    /* Initialize dirpaths */
    if (!(initAFSDirPath() & AFSDIR_SERVER_PATHS_OK)) {
#ifdef AFS_NT40_ENV
	ReportErrorEventAlt(AFSEVT_SVR_NO_INSTALL_DIR, 0, argv[0], 0);
#endif
	fprintf(stderr, "%s: Unable to obtain AFS server directory.\n",
		argv[0]);
	exit(2);
    }

    vl_dbaseName = strdup(AFSDIR_SERVER_VLDB_FILEPATH);
    configDir = strdup(AFSDIR_SERVER_ETC_DIRPATH);
    logFile = strdup(AFSDIR_SERVER_PTLOG_FILEPATH);

    cmd_DisableAbbreviations();
    cmd_DisablePositionalCommands();
    opts = cmd_CreateSyntax(NULL, NULL, NULL, NULL);

    /* vlserver specific options */
    cmd_AddParmAtOffset(opts, OPT_noauth, "-noauth", CMD_FLAG,
		        CMD_OPTIONAL, "disable authentication");
    cmd_AddParmAtOffset(opts, OPT_smallmem, "-smallmem", CMD_FLAG,
		        CMD_OPTIONAL, "optimise for small memory systems");

    /* general server options */
    cmd_AddParmAtOffset(opts, OPT_auditlog, "-auditlog", CMD_SINGLE,
		        CMD_OPTIONAL, "location of audit log");
    cmd_AddParmAtOffset(opts, OPT_auditiface, "-audit-interface", CMD_SINGLE,
		        CMD_OPTIONAL, "interface to use for audit logging");
    cmd_AddParmAtOffset(opts, OPT_config, "-config", CMD_SINGLE,
		        CMD_OPTIONAL, "configuration location");
    cmd_AddParmAtOffset(opts, OPT_debug, "-d", CMD_SINGLE,
		        CMD_OPTIONAL, "debug level");
    cmd_AddParmAtOffset(opts, OPT_database, "-database", CMD_SINGLE,
		        CMD_OPTIONAL, "database file");
    cmd_AddParmAlias(opts, OPT_database, "-db");
    cmd_AddParmAtOffset(opts, OPT_logfile, "-logfile", CMD_SINGLE,
		        CMD_OPTIONAL, "location of logfile");
    cmd_AddParmAtOffset(opts, OPT_threads, "-p", CMD_SINGLE, CMD_OPTIONAL,
		        "number of threads");
#if !defined(AFS_NT40_ENV)
    cmd_AddParmAtOffset(opts, OPT_syslog, "-syslog", CMD_SINGLE_OR_FLAG,
		        CMD_OPTIONAL, "log to syslog");
#endif

    /* rx options */
    cmd_AddParmAtOffset(opts, OPT_peer, "-enable_peer_stats", CMD_FLAG,
		        CMD_OPTIONAL, "enable RX transport statistics");
    cmd_AddParmAtOffset(opts, OPT_process, "-enable_process_stats", CMD_FLAG,
		        CMD_OPTIONAL, "enable RX RPC statistics");
    cmd_AddParmAtOffset(opts, OPT_nojumbo, "-nojumbo", CMD_FLAG,
		        CMD_OPTIONAL, "disable jumbograms");
    cmd_AddParmAtOffset(opts, OPT_jumbo, "-jumbo", CMD_FLAG,
		        CMD_OPTIONAL, "enable jumbograms");
    cmd_AddParmAtOffset(opts, OPT_rxbind, "-rxbind", CMD_FLAG,
		        CMD_OPTIONAL, "bind only to the primary interface");
    cmd_AddParmAtOffset(opts, OPT_rxmaxmtu, "-rxmaxmtu", CMD_SINGLE,
		        CMD_OPTIONAL, "maximum MTU for RX");
    cmd_AddParmAtOffset(opts, OPT_trace, "-trace", CMD_SINGLE,
		        CMD_OPTIONAL, "rx trace file");

    /* rxkad options */
    cmd_AddParmAtOffset(opts, OPT_dotted, "-allow-dotted-principals",
		        CMD_FLAG, CMD_OPTIONAL,
		        "permit Kerberos 5 principals with dots");

    code = cmd_Parse(argc, argv, &opts);
    if (code)
	return -1;

    /* vlserver options */
    cmd_OptionAsFlag(opts, OPT_noauth, &noAuth);
    cmd_OptionAsFlag(opts, OPT_smallmem, &smallMem);
    if (cmd_OptionAsString(opts, OPT_trace, &optstring) == 0) {
	extern char rxi_tracename[80];
	strcpy(rxi_tracename, optstring);
	free(optstring);
	optstring = NULL;
    }

    /* general server options */

    cmd_OptionAsString(opts, OPT_auditlog, &auditFileName);

    if (cmd_OptionAsString(opts, OPT_auditiface, &interface) == 0) {
	if (osi_audit_interface(interface)) {
	    printf("Invalid audit interface '%s'\n", interface);
	    return -1;
	}
	free(interface);
    }

    cmd_OptionAsString(opts, OPT_config, &configDir);
    cmd_OptionAsInt(opts, OPT_debug, &LogLevel);
    cmd_OptionAsString(opts, OPT_database, &vl_dbaseName);
    cmd_OptionAsString(opts, OPT_logfile, &logFile);

    if (cmd_OptionAsInt(opts, OPT_threads, &lwps) == 0) {
	if (lwps > MAXLWP) {
	     printf("Warning: '-p %d' is too big; using %d instead\n",
		    lwps, MAXLWP);
	     lwps = MAXLWP;
	}
    }
#ifndef AFS_NT40_ENV
    if (cmd_OptionPresent(opts, OPT_syslog)) {
        serverLogSyslog = 1;
        cmd_OptionAsInt(opts, OPT_syslog, &serverLogSyslogFacility);
    }
#endif

    /* rx options */
    if (cmd_OptionPresent(opts, OPT_peer))
	rx_enablePeerRPCStats();
    if (cmd_OptionPresent(opts, OPT_process))
	rx_enableProcessRPCStats();
    if (cmd_OptionPresent(opts, OPT_nojumbo))
	rxJumbograms = 0;
    if (cmd_OptionPresent(opts, OPT_jumbo))
	rxJumbograms = 1;

    cmd_OptionAsFlag(opts, OPT_rxbind, &rxBind);

    if (cmd_OptionAsInt(opts, OPT_rxmaxmtu, &rxMaxMTU) == 0) {
	if ((rxMaxMTU < RX_MIN_PACKET_SIZE) ||
	    (rxMaxMTU > RX_MAX_PACKET_DATA_SIZE)) {
	    printf("rxMaxMTU %d invalid; must be between %d-%" AFS_SIZET_FMT "\n",
		   rxMaxMTU, RX_MIN_PACKET_SIZE,
		   RX_MAX_PACKET_DATA_SIZE);
	    return -1;
	}
    }

    /* rxkad options */
    cmd_OptionAsFlag(opts, OPT_dotted, &rxkadDisableDotCheck);

    if (auditFileName) {
	osi_audit_file(auditFileName);
    }

#ifndef AFS_NT40_ENV
    serverLogSyslogTag = "vlserver";
#endif
    OpenLog(logFile);	/* set up logging */
    SetupLogSignals();

    tdir = afsconf_Open(configDir);
    if (!tdir) {
	printf
	    ("vlserver: can't open configuration files in dir %s, giving up.\n",
	     configDir);
	exit(1);
    }
#ifdef AFS_NT40_ENV
    /* initialize winsock */
    if (afs_winsockInit() < 0) {
	ReportErrorEventAlt(AFSEVT_SVR_WINSOCK_INIT_FAILED, 0, argv[0], 0);
	fprintf(stderr, "vlserver: couldn't initialize winsock. \n");
	exit(1);
    }
#endif
    /* get this host */
    gethostname(hostname, sizeof(hostname));
    th = gethostbyname(hostname);
    if (!th) {
	printf("vlserver: couldn't get address of this host (%s).\n",
	       hostname);
	exit(1);
    }
    memcpy(&myHost, th->h_addr, sizeof(afs_uint32));

#if !defined(AFS_HPUX_ENV) && !defined(AFS_NT40_ENV)
    signal(SIGXCPU, CheckSignal_Signal);
#endif
    /* get list of servers */
    code =
	afsconf_GetExtendedCellInfo(tdir, NULL, AFSCONF_VLDBSERVICE, &info,
				    clones);
    if (code) {
	printf("vlserver: Couldn't get cell server list for 'afsvldb'.\n");
	exit(2);
    }

    vldb_confdir = tdir;	/* Preserve our configuration dir */
    /* rxvab no longer supported */
    memset(&tkey, 0, sizeof(tkey));

    if (noAuth)
	afsconf_SetNoAuthFlag(tdir, 1);

    if (rxBind) {
	afs_int32 ccode;
#ifndef AFS_NT40_ENV
        if (AFSDIR_SERVER_NETRESTRICT_FILEPATH ||
            AFSDIR_SERVER_NETINFO_FILEPATH) {
            char reason[1024];
            ccode = parseNetFiles(SHostAddrs, NULL, NULL,
				  ADDRSPERSITE, reason,
				  AFSDIR_SERVER_NETINFO_FILEPATH,
				  AFSDIR_SERVER_NETRESTRICT_FILEPATH);
        } else
#endif
	{
            ccode = rx_getAllAddr(SHostAddrs, ADDRSPERSITE);
        }
        if (ccode == 1) {
            host = SHostAddrs[0];
	    rx_InitHost(host, htons(AFSCONF_VLDBPORT));
	}
    }

    ubik_nBuffers = 512;
    ubik_SetClientSecurityProcs(afsconf_ClientAuth, afsconf_UpToDate, tdir);
    ubik_SetServerSecurityProcs(afsconf_BuildServerSecurityObjects,
				afsconf_CheckAuth, tdir);

    ubik_SyncWriterCacheProc = vlsynccache;
    code =
	ubik_ServerInitByInfo(myHost, htons(AFSCONF_VLDBPORT), &info, clones,
			      vl_dbaseName, &VL_dbase);
    if (code) {
	printf("vlserver: Ubik init failed: %s\n", afs_error_message(code));
	exit(2);
    }
    if (!rxJumbograms) {
	rx_SetNoJumbo();
    }
    if (rxMaxMTU != -1) {
	rx_SetMaxMTU(rxMaxMTU);
    }
    rx_SetRxDeadTime(50);

    memset(rd_HostAddress, 0, sizeof(rd_HostAddress));
    memset(wr_HostAddress, 0, sizeof(wr_HostAddress));
    initialize_dstats();

    afsconf_BuildServerSecurityObjects(tdir, &securityClasses, &numClasses);

    tservice =
	rx_NewServiceHost(host, 0, USER_SERVICE_ID, "Vldb server",
			  securityClasses, numClasses,
			  VL_ExecuteRequest);
    if (tservice == (struct rx_service *)0) {
	printf("vlserver: Could not create VLDB_SERVICE rx service\n");
	exit(3);
    }
    rx_SetMinProcs(tservice, 2);
    if (lwps < 4)
	lwps = 4;
    rx_SetMaxProcs(tservice, lwps);

    if (rxkadDisableDotCheck) {
        rx_SetSecurityConfiguration(tservice, RXS_CONFIG_FLAGS,
                                    (void *)RXS_CONFIG_FLAGS_DISABLE_DOTCHECK);
    }

    tservice =
	rx_NewServiceHost(host, 0, RX_STATS_SERVICE_ID, "rpcstats",
			  securityClasses, numClasses,
			  RXSTATS_ExecuteRequest);
    if (tservice == (struct rx_service *)0) {
	printf("vlserver: Could not create rpc stats rx service\n");
	exit(3);
    }
    rx_SetMinProcs(tservice, 2);
    rx_SetMaxProcs(tservice, 4);

    LogCommandLine(argc, argv, "vlserver", VldbVersion, "Starting AFS", FSLog);
    printf("%s\n", cml_version_number);	/* Goes to the log */

    /* allow super users to manage RX statistics */
    rx_SetRxStatUserOk(vldb_rxstat_userok);

    rx_StartServer(1);		/* Why waste this idle process?? */

    return 0; /* not reachable */
}