icmp.c

snmp的源代码,已经在我的ubuntu下编译通过

/*
 *  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
#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 "util_funcs.h"
#include "icmp.h"
#include "sysORTable.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

        /*********************
	 *
	 *  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 
 */
oid             icmp_oid[] = { SNMP_OID_MIB2, 5 };
#ifdef USING_MIBII_IP_MODULE
extern oid      ip_module_oid[];
extern int      ip_module_oid_len;
extern int      ip_module_count;
#endif

void
init_icmp(void)
{
    netsnmp_handler_registration *reginfo;

    /*
     * register ourselves with the agent as a group of scalars...
     */
    DEBUGMSGTL(("mibII/icmp", "Initialising ICMP group\n"));
    reginfo = netsnmp_create_handler_registration("icmp", icmp_handler,
		    icmp_oid, OID_LENGTH(icmp_oid), HANDLER_CAN_RONLY);
    netsnmp_register_scalar_group(reginfo, ICMPINMSGS, ICMPOUTADDRMASKREPS);
    /*
     * .... with a local cache
     *    (except for HP-UX 11, which extracts objects individually)
     */
#ifndef hpux11
    netsnmp_inject_handler( reginfo,
		    netsnmp_get_cache_handler(ICMP_STATS_CACHE_TIMEOUT,
			   		icmp_load, icmp_free,
					icmp_oid, OID_LENGTH(icmp_oid)));
#endif

#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

#ifdef ICMPSTAT_SYMBOL
    auto_nlist(ICMPSTAT_SYMBOL, 0, 0);
#endif
#ifdef solaris2
    init_kernel_sunos5();
#endif
}


        /*********************
	 *
	 *  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 WIN32
#include <iphlpapi.h>
#define ICMP_STAT_STRUCTURE MIB_ICMP
#endif

/* ?? #if (defined(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.
     * But just to be safe, check this and load it manually if necessary
     */
#ifndef hpux11
    if (!netsnmp_cache_is_valid(reqinfo, reginfo->handlerName)) {
        netsnmp_assert("cache" == "valid"); /* always false */
        icmp_load( NULL, NULL );	/* XXX - check for failure */
    }
#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;
#else                          /* USES_SNMP_DESIGNED_ICMPSTAT */

#ifdef USES_TRADITIONAL_ICMPSTAT
    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;
#else                          /* USES_TRADITIONAL_ICMPSTAT */

#ifdef 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: