/*
 *  ICMP MIB group implementation - icmp.c
 */

#include <net-snmp/net-snmp-config.h>
#include "mibII_common.h"

#if HAVE_NETINET_IP_ICMP_H
#include <netinet/ip_icmp.h>
#endif

#ifdef NETSNMP_ENABLE_IPV6
#if HAVE_NETINET_ICMP6_H
#include <netinet/icmp6.h>
#endif
#endif /* NETSNMP_ENABLE_IPV6 */

#if HAVE_NETINET_ICMP_VAR_H
#include <netinet/icmp_var.h>
#endif

#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/agent/auto_nlist.h>

#include <net-snmp/agent/cache_handler.h>
#include <net-snmp/agent/scalar_group.h>
#include <net-snmp/agent/sysORTable.h>

#include "util_funcs/MIB_STATS_CACHE_TIMEOUT.h"
#include "icmp.h"

#ifndef MIB_STATS_CACHE_TIMEOUT
#define MIB_STATS_CACHE_TIMEOUT	5
#endif
#ifndef ICMP_STATS_CACHE_TIMEOUT
#define ICMP_STATS_CACHE_TIMEOUT	MIB_STATS_CACHE_TIMEOUT
#endif

/* redefine ICMP6 message types from glibc < 2.4 to newer names */
#ifndef MLD_LISTENER_QUERY
#define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
#define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
#define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
#endif /* ICMP6_MEMBERSHIP_QUERY */


#if defined(HAVE_LIBPERFSTAT_H) && (defined(aix4) || defined(aix5) || defined(aix6) || defined(aix7)) && !defined(FIRST_PROTOCOL)
#ifdef HAVE_SYS_PROTOSW_H
#include <sys/protosw.h>
#endif
#include <libperfstat.h>
#ifdef FIRST_PROTOCOL
perfstat_protocol_t ps_proto;
perfstat_id_t ps_name;
#define _USE_PERFSTAT_PROTOCOL 1
#endif
#endif

        /*********************
	 *
	 *  Kernel & interface information,
	 *   and internal forward declarations
	 *
	 *********************/

        /*********************
	 *
	 *  Initialisation & common implementation functions
	 *
	 *********************/


/*
 * Define the OID pointer to the top of the mib tree that we're
 * registering underneath 
 */
static const oid icmp_oid[] = { SNMP_OID_MIB2, 5 };
static const oid icmp_stats_tbl_oid[] = { SNMP_OID_MIB2, 5, 29 };
static const oid icmp_msg_stats_tbl_oid[] = { SNMP_OID_MIB2, 5, 30 };
#ifdef USING_MIBII_IP_MODULE
extern oid      ip_module_oid[];
extern int      ip_module_oid_len;
extern int      ip_module_count;
#endif

#ifdef linux
struct icmp_stats_table_entry {
	uint32_t ipVer;
        uint32_t icmpStatsInMsgs;
        uint32_t icmpStatsInErrors;
        uint32_t icmpStatsOutMsgs;
        uint32_t icmpStatsOutErrors;
};

struct icmp_stats_table_entry icmp_stats_table[2];
 
#define ICMP_MSG_STATS_HAS_IN 1
#define ICMP_MSG_STATS_HAS_OUT 2

struct icmp_msg_stats_table_entry {
        uint32_t ipVer;
        uint32_t icmpMsgStatsType;
        uint32_t icmpMsgStatsInPkts;
        uint32_t icmpMsgStatsOutPkts;
        int flags;
};

#ifdef linux
/* Linux keeps track of all possible message types */
#define ICMP_MSG_STATS_IPV4_COUNT 256
#else
#define ICMP_MSG_STATS_IPV4_COUNT 11
#endif

#ifdef NETSNMP_ENABLE_IPV6
#ifdef linux
/* Linux keeps track of all possible message types */
#define ICMP_MSG_STATS_IPV6_COUNT 256
#else
#define ICMP_MSG_STATS_IPV6_COUNT 14
#endif
#else
#define ICMP_MSG_STATS_IPV6_COUNT 0
#endif /* NETSNMP_ENABLE_IPV6 */

struct icmp_msg_stats_table_entry icmp_msg_stats_table[ICMP_MSG_STATS_IPV4_COUNT + ICMP_MSG_STATS_IPV6_COUNT];

int
icmp_stats_load(netsnmp_cache *cache, void *vmagic)
{

	/*
         * note don't bother using the passed in cache
	 * and vmagic pointers.  They are useless as they 
	 * currently point to the icmp system stats cache	
	 * since I see little point in registering another
	 * cache for this table.  Its not really needed
	 */

	int i;
	struct icmp_mib v4icmp;
	struct icmp6_mib v6icmp;
	for(i=0;i<2;i++) {
		switch(i) {
			case 0:
				linux_read_icmp_stat(&v4icmp);
				icmp_stats_table[i].icmpStatsInMsgs = v4icmp.icmpInMsgs;
				icmp_stats_table[i].icmpStatsInErrors = v4icmp.icmpInErrors;
				icmp_stats_table[i].icmpStatsOutMsgs = v4icmp.icmpOutMsgs;
				icmp_stats_table[i].icmpStatsOutErrors = v4icmp.icmpOutErrors;
				break;
			default:
				memset(&icmp_stats_table[i],0,
					sizeof(struct icmp_stats_table_entry));
				linux_read_icmp6_stat(&v6icmp);
				icmp_stats_table[i].icmpStatsInMsgs = v6icmp.icmp6InMsgs;
				icmp_stats_table[i].icmpStatsInErrors = v6icmp.icmp6InErrors;
				icmp_stats_table[i].icmpStatsOutMsgs = v6icmp.icmp6OutMsgs;
				icmp_stats_table[i].icmpStatsOutErrors = v6icmp.icmp6OutDestUnreachs +
					v6icmp.icmp6OutPktTooBigs +  v6icmp.icmp6OutTimeExcds +
					v6icmp.icmp6OutParmProblems;
				break;
		}
		icmp_stats_table[i].ipVer=i+1;
	}

	return 0;
}

int
icmp_msg_stats_load(netsnmp_cache *cache, void *vmagic)
{
    struct icmp_mib v4icmp;
    struct icmp4_msg_mib v4icmpmsg;
#ifdef NETSNMP_ENABLE_IPV6
    struct icmp6_mib v6icmp;
    struct icmp6_msg_mib v6icmpmsg;
#endif
    int i, j, k, flag, inc;

    memset(&icmp_msg_stats_table, 0, sizeof(icmp_msg_stats_table));

    i = 0;
    flag = 0;
    k = 0;
    inc = 0;
    linux_read_icmp_msg_stat(&v4icmp, &v4icmpmsg, &flag);
    if (flag) {
        while (255 >= k) {
            if (v4icmpmsg.vals[k].InType) {
                icmp_msg_stats_table[i].ipVer = 1;
                icmp_msg_stats_table[i].icmpMsgStatsType = k;
                icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmpmsg.vals[k].InType;
                icmp_msg_stats_table[i].flags = icmp_msg_stats_table[i].flags | ICMP_MSG_STATS_HAS_IN;
                inc = 1; /* Set this if we found a valid entry */
            }
            if (v4icmpmsg.vals[k].OutType) {
                icmp_msg_stats_table[i].ipVer = 1;
                icmp_msg_stats_table[i].icmpMsgStatsType = k;
                icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmpmsg.vals[k].OutType;
                icmp_msg_stats_table[i].flags = icmp_msg_stats_table[i].flags | ICMP_MSG_STATS_HAS_OUT;
                inc = 1; /* Set this if we found a valid entry */
            }
            if (inc) {
                i++;
                inc = 0;
            }
            k++;
        }
    } else {
        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_ECHOREPLY;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInEchoReps;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutEchoReps;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_DEST_UNREACH;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInDestUnreachs;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutDestUnreachs;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_SOURCE_QUENCH;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInSrcQuenchs;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutSrcQuenchs;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_REDIRECT;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInRedirects;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutRedirects;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_ECHO;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInEchos;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutEchos;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_TIME_EXCEEDED;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInTimeExcds;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutTimeExcds;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_PARAMETERPROB;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInParmProbs;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutParmProbs;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_TIMESTAMP;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInTimestamps;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutTimestamps;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_TIMESTAMPREPLY;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInTimestampReps;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutTimestampReps;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_ADDRESS;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInAddrMasks;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutAddrMasks;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP_ADDRESSREPLY;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v4icmp.icmpInAddrMaskReps;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v4icmp.icmpOutAddrMaskReps;
        i++;

        /* set the IP version and default flags */
        for (j = 0; j < ICMP_MSG_STATS_IPV4_COUNT; j++) {
            icmp_msg_stats_table[j].ipVer = 1;
            icmp_msg_stats_table[j].flags = ICMP_MSG_STATS_HAS_IN | ICMP_MSG_STATS_HAS_OUT;
        }
    }

#ifdef NETSNMP_ENABLE_IPV6
    flag = 0;
    k = 0;
    inc = 0;
    linux_read_icmp6_msg_stat(&v6icmp, &v6icmpmsg, &flag);
    if (flag) {
        while (255 >= k) {
            if (v6icmpmsg.vals[k].InType) {
                icmp_msg_stats_table[i].ipVer = 2;
                icmp_msg_stats_table[i].icmpMsgStatsType = k;
                icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmpmsg.vals[k].InType;
                icmp_msg_stats_table[i].flags = icmp_msg_stats_table[i].flags | ICMP_MSG_STATS_HAS_IN;
                inc = 1; /* Set this if we found a valid entry */
            }
            if (v6icmpmsg.vals[k].OutType) {
                icmp_msg_stats_table[i].ipVer = 2;
                icmp_msg_stats_table[i].icmpMsgStatsType = k;
                icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmpmsg.vals[k].OutType;
                icmp_msg_stats_table[i].flags = icmp_msg_stats_table[i].flags | ICMP_MSG_STATS_HAS_OUT;
                inc = 1; /* Set this if we found a valid entry */
            }
            if (inc) {
                i++;
                inc = 0;
            }
            k++;
        }
    } else {
        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP6_DST_UNREACH;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InDestUnreachs;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutDestUnreachs;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP6_PACKET_TOO_BIG;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InPktTooBigs;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutPktTooBigs;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP6_TIME_EXCEEDED;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InTimeExcds;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutTimeExcds;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP6_PARAM_PROB;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InParmProblems;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutParmProblems;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP6_ECHO_REQUEST;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InEchos;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = 0;
        icmp_msg_stats_table[i].flags = ICMP_MSG_STATS_HAS_IN;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ICMP6_ECHO_REPLY;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InEchoReplies;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutEchoReplies;
        i++;

#ifdef MLD_LISTENER_QUERY
        icmp_msg_stats_table[i].icmpMsgStatsType = MLD_LISTENER_QUERY;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InGroupMembQueries;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = 0;
        icmp_msg_stats_table[i].flags = ICMP_MSG_STATS_HAS_IN;
        i++;
        icmp_msg_stats_table[i].icmpMsgStatsType = MLD_LISTENER_REPORT;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InGroupMembResponses;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutGroupMembResponses;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = MLD_LISTENER_REDUCTION;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InGroupMembReductions;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutGroupMembReductions;
        i++;
#endif

        icmp_msg_stats_table[i].icmpMsgStatsType = ND_ROUTER_SOLICIT;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InRouterSolicits;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutRouterSolicits;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ND_ROUTER_ADVERT;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InRouterAdvertisements;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = 0;
        icmp_msg_stats_table[i].flags = ICMP_MSG_STATS_HAS_IN;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ND_NEIGHBOR_SOLICIT;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InNeighborSolicits;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutNeighborSolicits;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ND_NEIGHBOR_ADVERT;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InNeighborAdvertisements;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutNeighborAdvertisements;
        i++;

        icmp_msg_stats_table[i].icmpMsgStatsType = ND_REDIRECT;
        icmp_msg_stats_table[i].icmpMsgStatsInPkts = v6icmp.icmp6InRedirects;
        icmp_msg_stats_table[i].icmpMsgStatsOutPkts = v6icmp.icmp6OutRedirects;

        for (j = 0; j < ICMP_MSG_STATS_IPV6_COUNT; j++) {
            icmp_msg_stats_table[ICMP_MSG_STATS_IPV4_COUNT + j].ipVer = 2;
            icmp_msg_stats_table[ICMP_MSG_STATS_IPV4_COUNT + j].flags = ICMP_MSG_STATS_HAS_IN | ICMP_MSG_STATS_HAS_OUT;
        }
    }
#endif /* NETSNMP_ENABLE_IPV6 */
    return 0;
}

netsnmp_variable_list *
icmp_stats_next_entry( void **loop_context,
                     void **data_context,
                     netsnmp_variable_list *index,
                     netsnmp_iterator_info *data)
{
	int i = (int)(intptr_t)(*loop_context);
	netsnmp_variable_list *idx = index;

	if(i > 1)
		return NULL;


	/*
	 *set IP version
	 */
	snmp_set_var_typed_value(idx, ASN_INTEGER, (u_char *)&icmp_stats_table[i].ipVer,
                                sizeof(uint32_t));
	idx = idx->next_variable;

	*data_context = &icmp_stats_table[i];

	*loop_context = (void *)(intptr_t)(++i);
	
	return index;
}


netsnmp_variable_list *
icmp_stats_first_entry( void **loop_context,
                     void **data_context,
                     netsnmp_variable_list *index,
                     netsnmp_iterator_info *data)
{

        *loop_context = NULL;
        *data_context = NULL;
        return icmp_stats_next_entry(loop_context, data_context, index, data);
}

netsnmp_variable_list *
icmp_msg_stats_next_entry(void **loop_context,
                          void **data_context,
                          netsnmp_variable_list *index,
                          netsnmp_iterator_info *data)
{
    int i = (int)(intptr_t)(*loop_context);
    netsnmp_variable_list *idx = index;

    if(i >= ICMP_MSG_STATS_IPV4_COUNT + ICMP_MSG_STATS_IPV6_COUNT)
        return NULL;

    /* set IP version */
    snmp_set_var_typed_value(idx, ASN_INTEGER,
            (u_char *)&icmp_msg_stats_table[i].ipVer,
            sizeof(uint32_t));

    /* set packet type */
    idx = idx->next_variable;
    snmp_set_var_typed_value(idx, ASN_INTEGER,
            (u_char *)&icmp_msg_stats_table[i].icmpMsgStatsType,
            sizeof(uint32_t));

    *data_context = &icmp_msg_stats_table[i];
    *loop_context = (void *)(intptr_t)(++i);

    return index;
}


netsnmp_variable_list *
icmp_msg_stats_first_entry(void **loop_context,
                           void **data_context,
                           netsnmp_variable_list *index,
                           netsnmp_iterator_info *data)
{
    *loop_context = NULL;
    *data_context = NULL;
    return icmp_msg_stats_next_entry(loop_context, data_context, index, data);
}
#endif

void
init_icmp(void)
{
#ifdef linux
    netsnmp_handler_registration *table_reginfo = NULL;
    netsnmp_handler_registration *msg_stats_reginfo = NULL;
    netsnmp_iterator_info *iinfo = NULL;
    netsnmp_iterator_info *msg_stats_iinfo = NULL;
    netsnmp_table_registration_info *table_info = NULL;
    netsnmp_table_registration_info *msg_stats_table_info = NULL;
#endif
    netsnmp_handler_registration *scalar_reginfo = NULL;
    int                    rc;

    /*
     * register ourselves with the agent as a group of scalars...
     */
    DEBUGMSGTL(("mibII/icmp", "Initialising ICMP group\n"));
    scalar_reginfo = netsnmp_create_handler_registration("icmp", icmp_handler,
		    icmp_oid, OID_LENGTH(icmp_oid), HANDLER_CAN_RONLY);
    if (!scalar_reginfo)
        return;

    rc = netsnmp_register_scalar_group(scalar_reginfo, ICMPINMSGS, ICMPOUTADDRMASKREPS);
    if (rc != SNMPERR_SUCCESS) {
        return;
    }

    /*
     * .... with a local cache
     *    (except for HP-UX 11, which extracts objects individually)
     */
#ifndef hpux11
    rc = netsnmp_inject_handler( scalar_reginfo,
		    netsnmp_get_cache_handler(ICMP_STATS_CACHE_TIMEOUT,
			   		icmp_load, icmp_free,
					icmp_oid, OID_LENGTH(icmp_oid)));
    if (rc != SNMPERR_SUCCESS)
        goto bail;
#endif
#ifdef linux

    /* register icmpStatsTable */

    table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
    if (!table_info)
        goto bail;

    netsnmp_table_helper_add_indexes(table_info, ASN_INTEGER, 0);
    table_info->min_column = ICMP_STAT_INMSG;
    table_info->max_column = ICMP_STAT_OUTERR;


    iinfo      = SNMP_MALLOC_TYPEDEF(netsnmp_iterator_info);
    if (!iinfo) 
        goto bail;

    iinfo->get_first_data_point = icmp_stats_first_entry;
    iinfo->get_next_data_point  = icmp_stats_next_entry;
    iinfo->table_reginfo        = table_info;

    table_reginfo = netsnmp_create_handler_registration("icmpStatsTable",
		icmp_stats_table_handler, icmp_stats_tbl_oid,
		OID_LENGTH(icmp_stats_tbl_oid), HANDLER_CAN_RONLY);
    if (!table_reginfo)
        goto bail;

    rc = netsnmp_register_table_iterator(table_reginfo, iinfo);
    if (rc != SNMPERR_SUCCESS) {
        table_reginfo = NULL;
        goto bail;
    }

    /* register icmpMsgStatsTable */
    msg_stats_table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
    if (!msg_stats_table_info)
        goto bail;

    netsnmp_table_helper_add_indexes(msg_stats_table_info, ASN_INTEGER, ASN_INTEGER, 0);
    msg_stats_table_info->min_column = ICMP_MSG_STAT_IN_PKTS;
    msg_stats_table_info->max_column = ICMP_MSG_STAT_OUT_PKTS;

    msg_stats_iinfo = SNMP_MALLOC_TYPEDEF(netsnmp_iterator_info);
    if (!msg_stats_iinfo)
        goto bail;

    msg_stats_iinfo->get_first_data_point = icmp_msg_stats_first_entry;
    msg_stats_iinfo->get_next_data_point  = icmp_msg_stats_next_entry;
    msg_stats_iinfo->table_reginfo        = msg_stats_table_info;

    msg_stats_reginfo = netsnmp_create_handler_registration("icmpMsgStatsTable",
            icmp_msg_stats_table_handler, icmp_msg_stats_tbl_oid,
            OID_LENGTH(icmp_msg_stats_tbl_oid), HANDLER_CAN_RONLY);
    if (!msg_stats_reginfo)
        goto bail;

    rc = netsnmp_register_table_iterator(msg_stats_reginfo, msg_stats_iinfo);
    if (rc != SNMPERR_SUCCESS) {
        msg_stats_reginfo = NULL;
        goto bail;
    }
    
    netsnmp_inject_handler( msg_stats_reginfo,
            netsnmp_get_cache_handler(ICMP_STATS_CACHE_TIMEOUT,
                icmp_load, icmp_free,
                icmp_msg_stats_tbl_oid, OID_LENGTH(icmp_msg_stats_tbl_oid)));
#ifndef hpux11
    netsnmp_inject_handler( table_reginfo,
		    netsnmp_get_cache_handler(ICMP_STATS_CACHE_TIMEOUT,
			   		icmp_load, icmp_free,
					icmp_stats_tbl_oid, OID_LENGTH(icmp_stats_tbl_oid)));
#endif /* ! hpux11 */
#endif /* linux */

#ifdef USING_MIBII_IP_MODULE
    if (++ip_module_count == 2)
        REGISTER_SYSOR_TABLE(ip_module_oid, ip_module_oid_len,
                             "The MIB module for managing IP and ICMP implementations");
#endif

#if !defined(_USE_PERFSTAT_PROTOCOL)
#ifdef ICMPSTAT_SYMBOL
    auto_nlist(ICMPSTAT_SYMBOL, 0, 0);
#endif
#ifdef solaris2
    init_kernel_sunos5();
#endif
#endif
    return;

#ifndef hpux11
bail:
#endif
#ifdef linux
    if (msg_stats_reginfo)
        netsnmp_handler_registration_free(msg_stats_reginfo);
    if (table_reginfo)
        netsnmp_handler_registration_free(table_reginfo);
#endif
    if (scalar_reginfo)
        netsnmp_handler_registration_free(scalar_reginfo);
}


        /*********************
	 *
	 *  System specific data formats
	 *
	 *********************/

#ifdef hpux11
#define ICMP_STAT_STRUCTURE	int
#endif

#ifdef linux
#define ICMP_STAT_STRUCTURE	struct icmp_mib
#define USES_SNMP_DESIGNED_ICMPSTAT
#undef ICMPSTAT_SYMBOL
#endif

#ifdef solaris2
#define ICMP_STAT_STRUCTURE	mib2_icmp_t
#define USES_SNMP_DESIGNED_ICMPSTAT
#endif

#ifdef NETBSD_STATS_VIA_SYSCTL
#define ICMP_STAT_STRUCTURE     struct icmp_mib
#define USES_SNMP_DESIGNED_ICMPSTAT
#undef ICMP_NSTATS
#endif

#ifdef HAVE_IPHLPAPI_H
#include <iphlpapi.h>
#define ICMP_STAT_STRUCTURE MIB_ICMP
#endif

/* ?? #if (defined(NETSNMP_CAN_USE_SYSCTL) && defined(ICMPCTL_STATS)) ?? */

#ifdef HAVE_SYS_ICMPIPSTATS_H
/* or #ifdef		HAVE_SYS_TCPIPSTATS_H  ??? */
#define ICMP_STAT_STRUCTURE	struct kna
#define USES_TRADITIONAL_ICMPSTAT
#endif

#if !defined(ICMP_STAT_STRUCTURE)
#define ICMP_STAT_STRUCTURE	struct icmpstat
#define USES_TRADITIONAL_ICMPSTAT
#endif

ICMP_STAT_STRUCTURE icmpstat;


        /*********************
	 *
	 *  System independent handler
	 *       (mostly!)
	 *
	 *********************/

int
icmp_handler(netsnmp_mib_handler          *handler,
             netsnmp_handler_registration *reginfo,
             netsnmp_agent_request_info   *reqinfo,
             netsnmp_request_info         *requests)
{
    netsnmp_request_info  *request;
    netsnmp_variable_list *requestvb;
    long     ret_value;
    oid      subid;
#ifdef USES_TRADITIONAL_ICMPSTAT
    int      i;
#endif

    /*
     * The cached data should already have been loaded by the
     *    cache handler, higher up the handler chain.
     */
#if defined(_USE_PERFSTAT_PROTOCOL)
    icmp_load(NULL, NULL);
#endif


    /*
     * 
     *
     */
    DEBUGMSGTL(("mibII/icmp", "Handler - mode %s\n",
                    se_find_label_in_slist("agent_mode", reqinfo->mode)));
    switch (reqinfo->mode) {
    case MODE_GET:
        for (request=requests; request; request=request->next) {
            requestvb = request->requestvb;
            subid = requestvb->name[OID_LENGTH(icmp_oid)];  /* XXX */
            DEBUGMSGTL(( "mibII/icmp", "oid: "));
            DEBUGMSGOID(("mibII/icmp", requestvb->name,
                                       requestvb->name_length));
            DEBUGMSG((   "mibII/icmp", "\n"));

            switch (subid) {
#ifdef USES_SNMP_DESIGNED_ICMPSTAT
    case ICMPINMSGS:
        ret_value = icmpstat.icmpInMsgs;
        break;
    case ICMPINERRORS:
        ret_value = icmpstat.icmpInErrors;
        break;
    case ICMPINDESTUNREACHS:
        ret_value = icmpstat.icmpInDestUnreachs;
        break;
    case ICMPINTIMEEXCDS:
        ret_value = icmpstat.icmpInTimeExcds;
        break;
    case ICMPINPARMPROBS:
        ret_value = icmpstat.icmpInParmProbs;
        break;
    case ICMPINSRCQUENCHS:
        ret_value = icmpstat.icmpInSrcQuenchs;
        break;
    case ICMPINREDIRECTS:
        ret_value = icmpstat.icmpInRedirects;
        break;
    case ICMPINECHOS:
        ret_value = icmpstat.icmpInEchos;
        break;
    case ICMPINECHOREPS:
        ret_value = icmpstat.icmpInEchoReps;
        break;
    case ICMPINTIMESTAMPS:
        ret_value = icmpstat.icmpInTimestamps;
        break;
    case ICMPINTIMESTAMPREPS:
        ret_value = icmpstat.icmpInTimestampReps;
        break;
    case ICMPINADDRMASKS:
        ret_value = icmpstat.icmpInAddrMasks;
        break;
    case ICMPINADDRMASKREPS:
        ret_value = icmpstat.icmpInAddrMaskReps;
        break;
    case ICMPOUTMSGS:
        ret_value = icmpstat.icmpOutMsgs;
        break;
    case ICMPOUTERRORS:
        ret_value = icmpstat.icmpOutErrors;
        break;
    case ICMPOUTDESTUNREACHS:
        ret_value = icmpstat.icmpOutDestUnreachs;
        break;
    case ICMPOUTTIMEEXCDS:
        ret_value = icmpstat.icmpOutTimeExcds;
        break;
    case ICMPOUTPARMPROBS:
        ret_value = icmpstat.icmpOutParmProbs;
        break;
    case ICMPOUTSRCQUENCHS:
        ret_value = icmpstat.icmpOutSrcQuenchs;
        break;
    case ICMPOUTREDIRECTS:
        ret_value = icmpstat.icmpOutRedirects;
        break;
    case ICMPOUTECHOS:
        ret_value = icmpstat.icmpOutEchos;
        break;
    case ICMPOUTECHOREPS:
        ret_value = icmpstat.icmpOutEchoReps;
        break;
    case ICMPOUTTIMESTAMPS:
        ret_value = icmpstat.icmpOutTimestamps;
        break;
    case ICMPOUTTIMESTAMPREPS:
        ret_value = icmpstat.icmpOutTimestampReps;
        break;
    case ICMPOUTADDRMASKS:
        ret_value = icmpstat.icmpOutAddrMasks;
        break;
    case ICMPOUTADDRMASKREPS:
        ret_value = icmpstat.icmpOutAddrMaskReps;
        break;
#elif defined(USES_TRADITIONAL_ICMPSTAT) && !defined(_USE_PERFSTAT_PROTOCOL)
    case ICMPINMSGS:
        ret_value = icmpstat.icps_badcode +
            icmpstat.icps_tooshort +
            icmpstat.icps_checksum + icmpstat.icps_badlen;
        for (i = 0; i <= ICMP_MAXTYPE; i++)
            ret_value += icmpstat.icps_inhist[i];
        break;
    case ICMPINERRORS:
        ret_value = icmpstat.icps_badcode +
            icmpstat.icps_tooshort +
            icmpstat.icps_checksum + icmpstat.icps_badlen;
        break;
    case ICMPINDESTUNREACHS:
        ret_value = icmpstat.icps_inhist[ICMP_UNREACH];
        break;
    case ICMPINTIMEEXCDS:
        ret_value = icmpstat.icps_inhist[ICMP_TIMXCEED];
        break;
    case ICMPINPARMPROBS:
        ret_value = icmpstat.icps_inhist[ICMP_PARAMPROB];
        break;
    case ICMPINSRCQUENCHS:
        ret_value = icmpstat.icps_inhist[ICMP_SOURCEQUENCH];
        break;
    case ICMPINREDIRECTS:
        ret_value = icmpstat.icps_inhist[ICMP_REDIRECT];
        break;
    case ICMPINECHOS:
        ret_value = icmpstat.icps_inhist[ICMP_ECHO];
        break;
    case ICMPINECHOREPS:
        ret_value = icmpstat.icps_inhist[ICMP_ECHOREPLY];
        break;
    case ICMPINTIMESTAMPS:
        ret_value = icmpstat.icps_inhist[ICMP_TSTAMP];
        break;
    case ICMPINTIMESTAMPREPS:
        ret_value = icmpstat.icps_inhist[ICMP_TSTAMPREPLY];
        break;
    case ICMPINADDRMASKS:
        ret_value = icmpstat.icps_inhist[ICMP_MASKREQ];
        break;
    case ICMPINADDRMASKREPS:
        ret_value = icmpstat.icps_inhist[ICMP_MASKREPLY];
        break;
    case ICMPOUTMSGS:
        ret_value = icmpstat.icps_oldshort + icmpstat.icps_oldicmp;
        for (i = 0; i <= ICMP_MAXTYPE; i++)
            ret_value += icmpstat.icps_outhist[i];
        break;
    case ICMPOUTERRORS:
        ret_value = icmpstat.icps_oldshort + icmpstat.icps_oldicmp;
        break;
    case ICMPOUTDESTUNREACHS:
        ret_value = icmpstat.icps_outhist[ICMP_UNREACH];
        break;
    case ICMPOUTTIMEEXCDS:
        ret_value = icmpstat.icps_outhist[ICMP_TIMXCEED];
        break;
    case ICMPOUTPARMPROBS:
        ret_value = icmpstat.icps_outhist[ICMP_PARAMPROB];
        break;
    case ICMPOUTSRCQUENCHS:
        ret_value = icmpstat.icps_outhist[ICMP_SOURCEQUENCH];
        break;
    case ICMPOUTREDIRECTS:
        ret_value = icmpstat.icps_outhist[ICMP_REDIRECT];
        break;
    case ICMPOUTECHOS:
        ret_value = icmpstat.icps_outhist[ICMP_ECHO];
        break;
    case ICMPOUTECHOREPS:
        ret_value = icmpstat.icps_outhist[ICMP_ECHOREPLY];
        break;
    case ICMPOUTTIMESTAMPS:
        ret_value = icmpstat.icps_outhist[ICMP_TSTAMP];
        break;
    case ICMPOUTTIMESTAMPREPS:
        ret_value = icmpstat.icps_outhist[ICMP_TSTAMPREPLY];
        break;
    case ICMPOUTADDRMASKS:
        ret_value = icmpstat.icps_outhist[ICMP_MASKREQ];
        break;
    case ICMPOUTADDRMASKREPS:
        ret_value = icmpstat.icps_outhist[ICMP_MASKREPLY];
        break;
#elif defined(hpux11)
    case ICMPINMSGS:
    case ICMPINERRORS:
    case ICMPINDESTUNREACHS:
    case ICMPINTIMEEXCDS:
    case ICMPINPARMPROBS:
    case ICMPINSRCQUENCHS:
    case ICMPINREDIRECTS:
    case ICMPINECHOS:
    case ICMPINECHOREPS:
    case ICMPINTIMESTAMPS:
    case ICMPINTIMESTAMPREPS:
    case ICMPINADDRMASKS:
    case ICMPINADDRMASKREPS:
    case ICMPOUTMSGS:
    case ICMPOUTERRORS:
    case ICMPOUTDESTUNREACHS:
    case ICMPOUTTIMEEXCDS:
    case ICMPOUTPARMPROBS:
    case ICMPOUTSRCQUENCHS:
    case ICMPOUTREDIRECTS:
    case ICMPOUTECHOS:
    case ICMPOUTECHOREPS:
    case ICMPOUTTIMESTAMPS:
    case ICMPOUTTIMESTAMPREPS:
    case ICMPOUTADDRMASKS:
    case ICMPOUTADDRMASKREPS:
	/*
	 * This is a bit of a hack, to shoehorn the HP-UX 11
	 * single-object retrieval approach into the caching
	 * architecture.
	 */
	if (icmp_load(NULL, (void*)subid) == -1 ) {
            netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHOBJECT);
            continue;
	}
        ret_value = icmpstat;
        break;
#elif defined (WIN32) || defined (cygwin)
    case ICMPINMSGS:
        ret_value = icmpstat.stats.icmpInStats.dwMsgs;
        break;
    case ICMPINERRORS:
        ret_value = icmpstat.stats.icmpInStats.dwErrors;
        break;
    case ICMPINDESTUNREACHS:
        ret_value = icmpstat.stats.icmpInStats.dwDestUnreachs;
        break;
    case ICMPINTIMEEXCDS:
        ret_value = icmpstat.stats.icmpInStats.dwTimeExcds;
        break;
    case ICMPINPARMPROBS:
        ret_value = icmpstat.stats.icmpInStats.dwParmProbs;
        break;
    case ICMPINSRCQUENCHS:
        ret_value = icmpstat.stats.icmpInStats.dwSrcQuenchs;
        break;
    case ICMPINREDIRECTS:
        ret_value = icmpstat.stats.icmpInStats.dwRedirects;
        break;
    case ICMPINECHOS:
        ret_value = icmpstat.stats.icmpInStats.dwEchos;
        break;
    case ICMPINECHOREPS:
        ret_value = icmpstat.stats.icmpInStats.dwEchoReps;
        break;
    case ICMPINTIMESTAMPS:
        ret_value = icmpstat.stats.icmpInStats.dwTimestamps;
        break;
    case ICMPINTIMESTAMPREPS:
        ret_value = icmpstat.stats.icmpInStats.dwTimestampReps;
        break;
    case ICMPINADDRMASKS:
        ret_value = icmpstat.stats.icmpInStats.dwAddrMasks;
        break;
    case ICMPINADDRMASKREPS:
        ret_value = icmpstat.stats.icmpInStats.dwAddrMaskReps;
        break;
    case ICMPOUTMSGS:
        ret_value = icmpstat.stats.icmpOutStats.dwMsgs;
        break;
    case ICMPOUTERRORS:
        ret_value = icmpstat.stats.icmpOutStats.dwErrors;
        break;
    case ICMPOUTDESTUNREACHS:
        ret_value = icmpstat.stats.icmpOutStats.dwDestUnreachs;
        break;
    case ICMPOUTTIMEEXCDS:
        ret_value = icmpstat.stats.icmpOutStats.dwTimeExcds;
        break;
    case ICMPOUTPARMPROBS:
        ret_value = icmpstat.stats.icmpOutStats.dwParmProbs;
        break;
    case ICMPOUTSRCQUENCHS:
        ret_value = icmpstat.stats.icmpOutStats.dwSrcQuenchs;
        break;
    case ICMPOUTREDIRECTS:
        ret_value = icmpstat.stats.icmpOutStats.dwRedirects;
        break;
    case ICMPOUTECHOS:
        ret_value = icmpstat.stats.icmpOutStats.dwEchos;
        break;
    case ICMPOUTECHOREPS:
        ret_value = icmpstat.stats.icmpOutStats.dwEchoReps;
        break;
    case ICMPOUTTIMESTAMPS:
        ret_value = icmpstat.stats.icmpOutStats.dwTimestamps;
        break;
    case ICMPOUTTIMESTAMPREPS:
        ret_value = icmpstat.stats.icmpOutStats.dwTimestampReps;
        break;
    case ICMPOUTADDRMASKS:
        ret_value = icmpstat.stats.icmpOutStats.dwAddrMasks;
        break;
    case ICMPOUTADDRMASKREPS:
        ret_value = icmpstat.stats.icmpOutStats.dwAddrMaskReps;
        break;
#elif defined(_USE_PERFSTAT_PROTOCOL)
    case ICMPINMSGS:
        ret_value = ps_proto.u.icmp.received;
        break;
    case ICMPINERRORS:
        ret_value = ps_proto.u.icmp.errors;
        break;
    case ICMPINDESTUNREACHS:
    case ICMPINTIMEEXCDS:
    case ICMPINPARMPROBS:
    case ICMPINSRCQUENCHS:
    case ICMPINREDIRECTS:
    case ICMPINECHOS:
    case ICMPINECHOREPS:
    case ICMPINTIMESTAMPS:
    case ICMPINTIMESTAMPREPS:
    case ICMPINADDRMASKS:
    case ICMPINADDRMASKREPS:
        ret_value = 0;
        break;
    case ICMPOUTMSGS:
        ret_value = ps_proto.u.icmp.sent;
        break;
    case ICMPOUTERRORS:
        ret_value = ps_proto.u.icmp.errors;
        break;
    case ICMPOUTDESTUNREACHS:
    case ICMPOUTTIMEEXCDS:
    case ICMPOUTPARMPROBS:
    case ICMPOUTSRCQUENCHS:
    case ICMPOUTREDIRECTS:
    case ICMPOUTECHOS:
    case ICMPOUTECHOREPS:
    case ICMPOUTTIMESTAMPS:
    case ICMPOUTTIMESTAMPREPS:
    case ICMPOUTADDRMASKS:
    case ICMPOUTADDRMASKREPS:
        ret_value = 0;
        break;
#endif                          /* USES_SNMP_DESIGNED_ICMPSTAT */
	    }
	    snmp_set_var_typed_value(request->requestvb, ASN_COUNTER,
			             (u_char *)&ret_value, sizeof(ret_value));
	}
        break;

    case MODE_GETNEXT:
    case MODE_GETBULK:
    case MODE_SET_RESERVE1:
    case MODE_SET_RESERVE2:
    case MODE_SET_ACTION:
    case MODE_SET_COMMIT:
    case MODE_SET_FREE:
    case MODE_SET_UNDO:
        snmp_log(LOG_WARNING, "mibII/icmp: Unsupported mode (%d)\n",
                               reqinfo->mode);
        break;
    default:
        snmp_log(LOG_WARNING, "mibII/icmp: Unrecognised mode (%d)\n",
                               reqinfo->mode);
        break;
    }

    return SNMP_ERR_NOERROR;
}


#ifdef linux
int
icmp_stats_table_handler(netsnmp_mib_handler  *handler,
                 netsnmp_handler_registration *reginfo,
                 netsnmp_agent_request_info   *reqinfo,
                 netsnmp_request_info         *requests)
{
	netsnmp_request_info  *request;
	netsnmp_variable_list *requestvb;
	netsnmp_table_request_info *table_info;
	struct icmp_stats_table_entry   *entry;
	oid      subid;

	switch (reqinfo->mode) {
		case MODE_GET:
			for (request=requests; request; request=request->next) {
				requestvb = request->requestvb;
				entry = (struct icmp_stats_table_entry *)netsnmp_extract_iterator_context(request);
				if (!entry)
					continue;
				table_info = netsnmp_extract_table_info(request);
				subid      = table_info->colnum;
				DEBUGMSGTL(( "mibII/icmpStatsTable", "oid: " ));
				DEBUGMSGOID(( "mibII/icmpStatsTable", request->requestvb->name,
						 request->requestvb->name_length ));
				DEBUGMSG(( "mibII/icmpStatsTable", " In %d InErr %d Out %d OutErr %d\n",
					      entry->icmpStatsInMsgs, entry->icmpStatsInErrors,
					      entry->icmpStatsOutMsgs, entry->icmpStatsOutErrors ));

				switch (subid) {
					case ICMP_STAT_INMSG:
						snmp_set_var_typed_value(requestvb, ASN_COUNTER,
							(u_char *)&entry->icmpStatsInMsgs, sizeof(uint32_t));
						break;	
					case ICMP_STAT_INERR:
						snmp_set_var_typed_value(requestvb, ASN_COUNTER,
							(u_char *)&entry->icmpStatsInErrors, sizeof(uint32_t));
						break;
					case ICMP_STAT_OUTMSG:
						snmp_set_var_typed_value(requestvb, ASN_COUNTER,
							(u_char *)&entry->icmpStatsOutMsgs, sizeof(uint32_t));
						break;
					case ICMP_STAT_OUTERR:
						snmp_set_var_typed_value(requestvb, ASN_COUNTER,
							(u_char *)&entry->icmpStatsOutErrors, sizeof(uint32_t));
						break;
					default:
						snmp_log(LOG_WARNING, "mibII/icmpStatsTable: Unrecognised column (%d)\n",(int)subid);
				}
			}
			break;
		case MODE_GETNEXT:
		case MODE_GETBULK:
		case MODE_SET_RESERVE1:
		case MODE_SET_RESERVE2:
		case MODE_SET_ACTION:
		case MODE_SET_COMMIT:
		case MODE_SET_FREE:
		case MODE_SET_UNDO:
			snmp_log(LOG_WARNING, "mibII/icmpStatsTable: Unsupported mode (%d)\n",
				reqinfo->mode);
			break;
		default:
			snmp_log(LOG_WARNING, "mibII/icmpStatsTable: Unrecognised mode (%d)\n",
				reqinfo->mode);
			break;

	}

	return SNMP_ERR_NOERROR;
}

int
icmp_msg_stats_table_handler(netsnmp_mib_handler          *handler,
                             netsnmp_handler_registration *reginfo,
                             netsnmp_agent_request_info   *reqinfo,
                             netsnmp_request_info         *requests)
{
    netsnmp_request_info *request;
    netsnmp_variable_list *requestvb;
    netsnmp_table_request_info *table_info;
    struct icmp_msg_stats_table_entry *entry;
    oid subid;

    switch (reqinfo->mode) {
        case MODE_GET:
            for (request = requests; request; request = request->next) {
                requestvb = request->requestvb;
                entry = (struct icmp_msg_stats_table_entry *)netsnmp_extract_iterator_context(request);
                if (!entry)
                    continue;
                table_info = netsnmp_extract_table_info(request);
                subid = table_info->colnum;
                DEBUGMSGTL(( "mibII/icmpMsgStatsTable", "oid: " ));
                DEBUGMSGOID(( "mibII/icmpMsgStatsTable", request->requestvb->name,
                                 request->requestvb->name_length ));
                DEBUGMSG(( "mibII/icmpMsgStatsTable", " In %d Out %d Flags 0x%x\n",
                                 entry->icmpMsgStatsInPkts, entry->icmpMsgStatsOutPkts, entry->flags ));

                switch (subid) {
                    case ICMP_MSG_STAT_IN_PKTS:
                        if (entry->flags & ICMP_MSG_STATS_HAS_IN) {
                            snmp_set_var_typed_value(requestvb, ASN_COUNTER,
                                    (u_char *)&entry->icmpMsgStatsInPkts, sizeof(uint32_t));
                        } else {
                            requestvb->type = SNMP_NOSUCHINSTANCE;
                        }
                        break;
                    case ICMP_MSG_STAT_OUT_PKTS:
                        if (entry->flags & ICMP_MSG_STATS_HAS_OUT) {
                            snmp_set_var_typed_value(requestvb, ASN_COUNTER,
                                    (u_char *)&entry->icmpMsgStatsOutPkts, sizeof(uint32_t));
                        } else {
                            requestvb->type = SNMP_NOSUCHINSTANCE;
                        }
                        break;
                    default:
                        snmp_log(LOG_WARNING, "mibII/icmpMsgStatsTable: Unrecognised column (%d)\n",(int)subid);
                }
            }
            break;
        case MODE_GETNEXT:
        case MODE_GETBULK:
        case MODE_SET_RESERVE1:
        case MODE_SET_RESERVE2:
        case MODE_SET_ACTION:
        case MODE_SET_COMMIT:
        case MODE_SET_FREE:
        case MODE_SET_UNDO:
            snmp_log(LOG_WARNING, "mibII/icmpStatsTable: Unsupported mode (%d)\n",
                    reqinfo->mode);
            break;
        default:
            snmp_log(LOG_WARNING, "mibII/icmpStatsTable: Unrecognised mode (%d)\n",
                    reqinfo->mode);
            break;

    }

    return SNMP_ERR_NOERROR;
}
#endif		/* linux */

        /*********************
	 *
	 *  Internal implementation functions
	 *
	 *********************/

#ifdef hpux11
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    int             fd;
    struct nmparms  p;
    unsigned int    ulen;
    int             ret;
    int             magic = (int) vmagic;

    if ((fd = open_mib("/dev/ip", O_RDONLY, 0, NM_ASYNC_OFF)) < 0) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP object %d (hpux11)\n", magic));
        return (-1);            /* error */
    }

    switch (magic) {
    case ICMPINMSGS:
        p.objid = ID_icmpInMsgs;
        break;
    case ICMPINERRORS:
        p.objid = ID_icmpInErrors;
        break;
    case ICMPINDESTUNREACHS:
        p.objid = ID_icmpInDestUnreachs;
        break;
    case ICMPINTIMEEXCDS:
        p.objid = ID_icmpInTimeExcds;
        break;
    case ICMPINPARMPROBS:
        p.objid = ID_icmpInParmProbs;
        break;
    case ICMPINSRCQUENCHS:
        p.objid = ID_icmpInSrcQuenchs;
        break;
    case ICMPINREDIRECTS:
        p.objid = ID_icmpInRedirects;
        break;
    case ICMPINECHOS:
        p.objid = ID_icmpInEchos;
        break;
    case ICMPINECHOREPS:
        p.objid = ID_icmpInEchoReps;
        break;
    case ICMPINTIMESTAMPS:
        p.objid = ID_icmpInTimestamps;
        break;
    case ICMPINTIMESTAMPREPS:
        p.objid = ID_icmpInTimestampReps;
        break;
    case ICMPINADDRMASKS:
        p.objid = ID_icmpInAddrMasks;
        break;
    case ICMPINADDRMASKREPS:
        p.objid = ID_icmpInAddrMaskReps;
        break;
    case ICMPOUTMSGS:
        p.objid = ID_icmpOutMsgs;
        break;
    case ICMPOUTERRORS:
        p.objid = ID_icmpOutErrors;
        break;
    case ICMPOUTDESTUNREACHS:
        p.objid = ID_icmpOutDestUnreachs;
        break;
    case ICMPOUTTIMEEXCDS:
        p.objid = ID_icmpOutTimeExcds;
        break;
    case ICMPOUTPARMPROBS:
        p.objid = ID_icmpOutParmProbs;
        break;
    case ICMPOUTSRCQUENCHS:
        p.objid = ID_icmpOutSrcQuenchs;
        break;
    case ICMPOUTREDIRECTS:
        p.objid = ID_icmpOutRedirects;
        break;
    case ICMPOUTECHOS:
        p.objid = ID_icmpOutEchos;
        break;
    case ICMPOUTECHOREPS:
        p.objid = ID_icmpOutEchoReps;
        break;
    case ICMPOUTTIMESTAMPS:
        p.objid = ID_icmpOutTimestamps;
        break;
    case ICMPOUTTIMESTAMPREPS:
        p.objid = ID_icmpOutTimestampReps;
        break;
    case ICMPOUTADDRMASKS:
        p.objid = ID_icmpOutAddrMasks;
        break;
    case ICMPOUTADDRMASKREPS:
        p.objid = ID_icmpOutAddrMaskReps;
        break;
    default:
        icmpstat = 0;
        close_mib(fd);
        return (0);
    }

    p.buffer = (void *)&icmpstat;
    ulen = sizeof(ICMP_STAT_STRUCTURE);
    p.len = &ulen;
    ret = get_mib_info(fd, &p);
    close_mib(fd);

    DEBUGMSGTL(("mibII/icmp", "%s ICMP object %d (hpux11)\n",
               (ret < 0 ? "Failed to load" : "Loaded"),  magic));
    return (ret);               /* 0: ok, < 0: error */
}
#elif defined(linux)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;

    ret_value = linux_read_icmp_stat(&icmpstat);

    if ( ret_value < 0 ) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (linux)\n"));
    } else {
        DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (linux)\n"));
    }
    icmp_stats_load(cache, vmagic);
    icmp_msg_stats_load(cache, vmagic);
    return ret_value;
}
#elif defined(solaris2)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;

    ret_value =
        getMibstat(MIB_ICMP, &icmpstat, sizeof(mib2_icmp_t), GET_FIRST,
                   &Get_everything, NULL);

    if ( ret_value < 0 ) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (solaris)\n"));
    } else {
        DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (solaris)\n"));
    }
    return ret_value;
}
#elif defined(NETBSD_STATS_VIA_SYSCTL)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value =- -1;

    ret_value = netbsd_read_icmp_stat(&icmpstat);

    if ( ret_value < 0 ) {
	DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (netbsd)\n"));
    } else {
	DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (netbsd)\n"));
    }
    return ret_value;
}
#elif defined (WIN32) || defined (cygwin)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;

    ret_value = GetIcmpStatistics(&icmpstat);

    if ( ret_value < 0 ) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (win32)\n"));
    } else {
        DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (win32)\n"));
    }
    return ret_value;
}
#elif defined(_USE_PERFSTAT_PROTOCOL)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;

    strcpy(ps_name.name, "icmp");
    ret_value = perfstat_protocol(&ps_name, &ps_proto, sizeof(ps_proto), 1);

    if ( ret_value < 0 ) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (AIX)\n"));
    } else {
        ret_value = 0;
        DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (AIX)\n"));
    }
    return ret_value;
}
#elif defined(NETSNMP_CAN_USE_SYSCTL) && defined(ICMPCTL_STATS)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;
    static int      sname[4] =
        { CTL_NET, PF_INET, IPPROTO_ICMP, ICMPCTL_STATS };
    size_t          len = sizeof(icmpstat);

    ret_value = sysctl(sname, 4, &icmpstat, &len, 0, 0);

    if ( ret_value < 0 ) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (sysctl)\n"));
    } else {
        DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (sysctl)\n"));
    }
    return ret_value;
}
#elif defined(HAVE_SYS_TCPIPSTATS_H)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;

    ret_value =
        sysmp(MP_SAGET, MPSA_TCPIPSTATS, &icmpstat, sizeof icmpstat);

    if ( ret_value < 0 ) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (tcpipstats)\n"));
    } else {
        DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (tcpipstats)\n"));
    }
    return ret_value;
}
#elif defined(ICMPSTAT_SYMBOL)
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;

    if (auto_nlist(ICMPSTAT_SYMBOL, (char *)&icmpstat, sizeof(icmpstat)))
        ret_value = 0;

    if ( ret_value < 0 ) {
        DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (icmpstat)\n"));
    } else {
        DEBUGMSGTL(("mibII/icmp", "Loaded ICMP Group (icmpstat)\n"));
    }
    return ret_value;
}
#else		/* ICMPSTAT_SYMBOL */
int
icmp_load(netsnmp_cache *cache, void *vmagic)
{
    long            ret_value = -1;

    DEBUGMSGTL(("mibII/icmp", "Failed to load ICMP Group (null)\n"));
    return ret_value;
}
#endif		/* hpux11 */

void
icmp_free(netsnmp_cache *cache, void *magic)
{
#if defined(_USE_PERFSTAT_PROTOCOL)
    memset(&ps_proto, 0, sizeof(ps_proto));
#else
    memset(&icmpstat, 0, sizeof(icmpstat));
#endif
}