C++ snmp_synch_response函数代码示例

void prsnmpstr(char *stroid) {
    struct snmp_pdu *pdu, *resp;
    oid tmp_oid[MAX_OID_LEN];
    size_t tmp_oid_len=MAX_OID_LEN;
    int stat;
    char *tmp;

    pdu=snmp_pdu_create(SNMP_MSG_GET);
    read_objid(stroid, tmp_oid, &tmp_oid_len);
    snmp_add_null_var(pdu, tmp_oid, tmp_oid_len);
    stat=snmp_synch_response(ses, pdu, &resp);

    if (stat != STAT_SUCCESS || resp->errstat != SNMP_ERR_NOERROR) 
        perr(resp);

    if(resp->variables->val_len && strlen((char *)resp->variables->val.string)) {
        tmp=malloc((resp->variables->val_len+1) * sizeof(char));
        memcpy(tmp, resp->variables->val.string, resp->variables->val_len);
        tmp[resp->variables->val_len]=0;
        printf("%s", tmp);
        free(tmp);
    }
    
    if(resp)
            snmp_free_pdu(resp);

}

static struct snmp_pdu *
snmp_get_item(char *host, char *community, char *mib_item)
{
	struct snmp_session session, *ss;
	struct snmp_pdu *request = NULL, *result = NULL;
	oid Oid[MAX_OID_LEN];
	unsigned int oid_len = MAX_OID_LEN;

	/* initialize the SNMP session */
	snmp_sess_init(&session);
	session.peername = host;
	session.community = (uchar_t *)community;
	session.community_len = strlen((const char *)session.community);
	session.version = SNMP_VERSION_1;
	session.retries = 0;

	if ((ss = snmp_open(&session)) == NULL)
		return (NULL);

	/* add the requested data */
	if (!read_objid(mib_item, Oid, &oid_len))
		snmp_perror(mib_item);

	/* initialize the request PDU */
	request = snmp_pdu_create(SNMP_MSG_GET);
	snmp_add_null_var(request, Oid, oid_len);

	(void) snmp_synch_response(ss, request, &result);

	snmp_close(ss);

	return (result);
}

/*
 * simple synchronous loop
 */
void synchronous (void)
{
  struct host *hp;

  for (hp = hosts; hp->name; hp++) {
    struct snmp_session ss, *sp;
    struct oid *op;

    snmp_sess_init(&ss);			/* initialize session */
    ss.version = SNMP_VERSION_2c;
    ss.peername = strdup(hp->name);
    ss.community = strdup(hp->community);
    ss.community_len = strlen(ss.community);
    if (!(sp = snmp_open(&ss))) {
      snmp_perror("snmp_open");
      continue;
    }
    for (op = oids; op->Name; op++) {
      struct snmp_pdu *req, *resp;
      int status;
      req = snmp_pdu_create(SNMP_MSG_GET);
      snmp_add_null_var(req, op->Oid, op->OidLen);
      status = snmp_synch_response(sp, req, &resp);
      if (!print_result(status, sp, resp)) break;
      snmp_free_pdu(resp);
    }
    snmp_close(sp);
  }
}

void prifalias(oid inst) {
    struct snmp_pdu *pdu, *resp;
    oid tmp_oid[] = { 1,3,6,1,2,1,31,1,1,1,18,0 };
    int stat;
    char *tmp;

    if(!extended) {
        fprintf(stderr, "ifalias is only available in eXtended mode\n");
        snmp_close(ses);
        SOCK_CLEANUP;
        exit(1);
    }
    
    tmp_oid[11]=inst;
    pdu=snmp_pdu_create(SNMP_MSG_GET);
    snmp_add_null_var(pdu, tmp_oid, sizeof(tmp_oid)/sizeof(oid));
    stat=snmp_synch_response(ses, pdu, &resp);

    if (stat != STAT_SUCCESS || resp->errstat != SNMP_ERR_NOERROR) 
        perr(resp);

    if(resp->variables->val_len && strlen((char *)resp->variables->val.string)) {
        tmp=malloc((resp->variables->val_len+1) * sizeof(char));
        memcpy(tmp, resp->variables->val.string, resp->variables->val_len);
        tmp[resp->variables->val_len]=0;
        printf("  \"%s\"", tmp);
        free(tmp);
    }

    if(resp)
            snmp_free_pdu(resp);

}

uint32_t getcntr32(int dir, oid inst) {
    struct snmp_pdu *pdu, *resp;
    oid iftable_oid[]  = { 1,3,6,1,2,1,2,2,1,0,0 };    // dir=9 ; inst=10
    int stat;
    uint32_t tmp;

    pdu=snmp_pdu_create(SNMP_MSG_GET);
    iftable_oid[9]=dir;
    iftable_oid[10]=inst;
    snmp_add_null_var(pdu, iftable_oid, sizeof(iftable_oid)/sizeof(oid));
    
    stat=snmp_synch_response(ses, pdu, &resp);
    if (stat != STAT_SUCCESS || resp->errstat != SNMP_ERR_NOERROR) 
        perr(resp);

    if(resp->variables->type != ASN_COUNTER) {
        fprintf(stderr, "\nError: unsupported data type (only 32bit counter is supported in normal mode)\n");
        snmp_close(ses);
        SOCK_CLEANUP;
        exit(1);
    }

    tmp=resp->variables->val.counter64->high;

    if(resp)
        snmp_free_pdu(resp);

    return tmp;
}

int snmp_get_bulk( struct snmp_session *ss, 
		   const char *bulk_objid, 
		   struct snmp_pdu *bulk_pdu, 
		   struct snmp_pdu **bulk_response )
{
	size_t anOID_len = MAX_OID_LEN;
	oid anOID[MAX_OID_LEN];
	int status;


	/* Create the PDU for theenrty_count data for our request. */
	read_objid(bulk_objid, anOID, &anOID_len);

	bulk_pdu = snmp_pdu_create(SNMP_MSG_GETBULK);
 	
	bulk_pdu->non_repeaters = 0; 
	
	bulk_pdu->max_repetitions = NUM_REPITIONS;
	
	snmp_add_null_var(bulk_pdu, anOID, anOID_len);
	
	/* Send the Request out.*/
	status = snmp_synch_response(ss, bulk_pdu, bulk_response);

	return(status);

}

/* report the value interfaces.ifNumber.0, actually the number of interfaces */
static int snmp_get_ifcount(struct snmp_session *ss) {
  int nifaces = -1;
  oid ifcount[] = { 1, 3, 6, 1, 2, 1, 2, 1, 0 };
  struct snmp_pdu *pdu;
  struct snmp_pdu *response = NULL;
  int status;

  if ((pdu = snmp_pdu_create(SNMP_MSG_GET)) == NULL) {
    ifstat_error("snmp_pdu_create: %s", snmp_api_errstring(snmp_errno));
    return -1;
  }

  snmp_add_null_var(pdu, ifcount, sizeof(ifcount) / sizeof(oid));

  if ((status = snmp_synch_response(ss, pdu, &response)) != STAT_SUCCESS ||
      response->errstat != SNMP_ERR_NOERROR ||
      response->variables == NULL ||
      response->variables->type != ASN_INTEGER) {
    if (status == STAT_SUCCESS)
      ifstat_error("snmp: Error: %s", snmp_errstring(response->errstat));
    else
      ifstat_error("snmpget(interfaces.ifNumber.0): %s", snmp_sess_errstring(ss));
    if (response)
      snmp_free_pdu(response);
    return -1;
  }
  nifaces = *(response->variables->val.integer);
  snmp_free_pdu(response);  
  
  if (nifaces < 0)
    return -1;
  return nifaces;
}

void processSnmpGet(char * oid){
	read_objid(oid, id_oid, &id_len);
    snmp_add_null_var(pdu, id_oid, id_len);
    int status = snmp_synch_response(session_handle, pdu, &response);
	for(vars = response->variables; vars; vars = vars->next_variable){
        snprint_variable(outbuff, 256, vars->name, vars->name_length, vars);
        resultString = strrchr(outbuff, ':');
    }
}

int ups_mib_mgr_get_upsBypassEntry(struct snmp_session *s, upsBypassEntry_t **upsBypassEntry)
{
    struct snmp_session *peer;
    struct snmp_pdu *request, *response;
    struct variable_list *vars;
    int status;

    request = snmp_pdu_create(SNMP_MSG_GETNEXT);
    snmp_add_null_var(request, upsBypassVoltage, sizeof(upsBypassVoltage)/sizeof(oid));
    snmp_add_null_var(request, upsBypassCurrent, sizeof(upsBypassCurrent)/sizeof(oid));
    snmp_add_null_var(request, upsBypassPower, sizeof(upsBypassPower)/sizeof(oid));

    peer = snmp_open(s);
    if (!peer) {
        return -1;
    }

    status = snmp_synch_response(peer, request, &response);
    if (status != STAT_SUCCESS) {
        if (response) snmp_free_pdu(response);
        snmp_close(peer);
        return -2;
    }

    *upsBypassEntry = (upsBypassEntry_t *) malloc(sizeof(upsBypassEntry_t));
    if (! *upsBypassEntry) {
        if (response) snmp_free_pdu(response);
        snmp_close(peer);
        return -4;
    }

    for (vars = response->variables; vars; vars = vars->next_variable) {
        if (vars->name_length > sizeof(upsBypassVoltage)/sizeof(oid)
            && memcmp(vars->name, upsBypassVoltage, sizeof(upsBypassVoltage)) == 0) {
            (*upsBypassEntry)->__upsBypassVoltage = *vars->val.integer;
            (*upsBypassEntry)->upsBypassVoltage = &((*upsBypassEntry)->__upsBypassVoltage);
        }
        if (vars->name_length > sizeof(upsBypassCurrent)/sizeof(oid)
            && memcmp(vars->name, upsBypassCurrent, sizeof(upsBypassCurrent)) == 0) {
            (*upsBypassEntry)->__upsBypassCurrent = *vars->val.integer;
            (*upsBypassEntry)->upsBypassCurrent = &((*upsBypassEntry)->__upsBypassCurrent);
        }
        if (vars->name_length > sizeof(upsBypassPower)/sizeof(oid)
            && memcmp(vars->name, upsBypassPower, sizeof(upsBypassPower)) == 0) {
            (*upsBypassEntry)->__upsBypassPower = *vars->val.integer;
            (*upsBypassEntry)->upsBypassPower = &((*upsBypassEntry)->__upsBypassPower);
        }
    }

    if (response) snmp_free_pdu(response);

    if (snmp_close(peer) == 0) {
        return -5;
    }

    return 0;
}

int ups_mib_mgr_get_upsOutput(struct snmp_session *s, upsOutput_t **upsOutput)
{
    struct snmp_session *peer;
    struct snmp_pdu *request, *response;
    struct variable_list *vars;
    int status;

    request = snmp_pdu_create(SNMP_MSG_GETNEXT);
    snmp_add_null_var(request, upsOutputSource, sizeof(upsOutputSource)/sizeof(oid));
    snmp_add_null_var(request, upsOutputFrequency, sizeof(upsOutputFrequency)/sizeof(oid));
    snmp_add_null_var(request, upsOutputNumLines, sizeof(upsOutputNumLines)/sizeof(oid));

    peer = snmp_open(s);
    if (!peer) {
        return -1;
    }

    status = snmp_synch_response(peer, request, &response);
    if (status != STAT_SUCCESS) {
        if (response) snmp_free_pdu(response);
        snmp_close(peer);
        return -2;
    }

    *upsOutput = (upsOutput_t *) malloc(sizeof(upsOutput_t));
    if (! *upsOutput) {
        if (response) snmp_free_pdu(response);
        snmp_close(peer);
        return -4;
    }

    for (vars = response->variables; vars; vars = vars->next_variable) {
        if (vars->name_length > sizeof(upsOutputSource)/sizeof(oid)
            && memcmp(vars->name, upsOutputSource, sizeof(upsOutputSource)) == 0) {
            (*upsOutput)->__upsOutputSource = *vars->val.integer;
            (*upsOutput)->upsOutputSource = &((*upsOutput)->__upsOutputSource);
        }
        if (vars->name_length > sizeof(upsOutputFrequency)/sizeof(oid)
            && memcmp(vars->name, upsOutputFrequency, sizeof(upsOutputFrequency)) == 0) {
            (*upsOutput)->__upsOutputFrequency = *vars->val.integer;
            (*upsOutput)->upsOutputFrequency = &((*upsOutput)->__upsOutputFrequency);
        }
        if (vars->name_length > sizeof(upsOutputNumLines)/sizeof(oid)
            && memcmp(vars->name, upsOutputNumLines, sizeof(upsOutputNumLines)) == 0) {
            (*upsOutput)->__upsOutputNumLines = *vars->val.integer;
            (*upsOutput)->upsOutputNumLines = &((*upsOutput)->__upsOutputNumLines);
        }
    }

    if (response) snmp_free_pdu(response);

    if (snmp_close(peer) == 0) {
        return -5;
    }

    return 0;
}

int powernet_snmp_kill_ups_power(UPSINFO *ups)
{
   /* Was 1} change submitted by Kastus Shchuka ([email protected]) 10Dec03 */
   oid upsBasicControlConserveBattery[] =
      { 1, 3, 6, 1, 4, 1, 318, 1, 1, 1, 6, 1, 1, 0 };
   struct snmp_ups_internal_data *Sid =
      (struct snmp_ups_internal_data *)ups->driver_internal_data;
   struct snmp_session *s = &Sid->session;
   struct snmp_session *peer;
   struct snmp_pdu *request, *response;
   int status;

   /*
    * Set up the SET request.
    */
   request = snmp_pdu_create(SNMP_MSG_SET);

   /*
    * Set upsBasicControlConserveBattery variable (INTEGER) to
    * turnOffUpsToConserveBattery(2) value. Will turn on the UPS only
    * when power returns.
    */
   if (snmp_add_var(request, upsBasicControlConserveBattery,
         sizeof(upsBasicControlConserveBattery) / sizeof(oid), 'i', "2")) {
      return 0;
   }

   peer = snmp_open(s);

   if (!peer) {
      Dmsg0(0, "Can not open the SNMP connection.\n");
      return 0;
   }

   status = snmp_synch_response(peer, request, &response);

   if (status != STAT_SUCCESS) {
      Dmsg0(0, "Unable to communicate with UPS.\n");
      return 0;
   }

   if (response->errstat != SNMP_ERR_NOERROR) {
      Dmsg1(0, "Unable to kill UPS power: can not set SNMP variable (%d).\n", response->errstat);
      return 0;
   }

   if (response)
      snmp_free_pdu(response);

   snmp_close(peer);

   return 1;
}

netsnmp_variable_list *
collect(netsnmp_session * ss, netsnmp_pdu *pdu,
        oid * base, size_t base_length)
{
    netsnmp_pdu    *response;
    int             running = 1;
    netsnmp_variable_list *saved = NULL, **vlpp = &saved;
    int             status;

    while (running) {
        /*
         * gotta catch em all, gotta catch em all! 
         */
        status = snmp_synch_response(ss, pdu, &response);
        if (status != STAT_SUCCESS || !response) {
            snmp_sess_perror("snmpdf", ss);
            exit(1);
        }
        if (response->errstat != SNMP_ERR_NOERROR) {
	    fprintf(stderr, "snmpdf: Error in packet: %s\n",
                    snmp_errstring(response->errstat));
            exit(1);
        }
        if (response && snmp_oid_compare(response->variables->name,
                                         SNMP_MIN(base_length,
                                                  response->variables->
                                                  name_length), base,
                                         base_length) != 0)
            running = 0;
        else {
            /*
             * get response 
             */
            *vlpp = response->variables;
            (*vlpp)->next_variable = NULL;      /* shouldn't be any, but just in case */

            /*
             * create the next request 
             */
            pdu = snmp_pdu_create(SNMP_MSG_GETNEXT);
            snmp_add_null_var(pdu, (*vlpp)->name, (*vlpp)->name_length);

            /*
             * finish loop setup 
             */
            vlpp = &((*vlpp)->next_variable);
            response->variables = NULL; /* ahh, forget about it */
        }
        snmp_free_pdu(response);
    }
    return saved;
}

bool Session::getVariables(const QStringList &oids, QValueVector<QVariant> &retvars, uint32_t &status, int startIndex)
{
	struct snmp_pdu *response = NULL;
	if ( ! m_session )
	{
		status = 0xFFFFFFFF;
		return false;
	}
	
	struct snmp_pdu *pdu = snmp_pdu_create(SNMP_MSG_GET);

	u_long anOID[MAX_OID_LEN];
	
	QStringList::const_iterator it = oids.begin();
	for(int i = 0; i < startIndex; i++) it++; // rough hack, but works
	
	for(int i = 0; it != oids.end() && i < 5; it++, i++ )
	{
		size_t anOID_len = MAX_OID_LEN;
		get_node((*it).latin1(), anOID, &anOID_len);
		snmp_add_null_var(pdu, anOID, anOID_len);
	}
	
	status = snmp_synch_response(m_session, pdu, &response);
	
	//! @todo Error handling should be changed in a more OO way.
	if ( status != STAT_SUCCESS )
	{
		snmp_sess_perror("snmpget", m_session);
		return false;
	}
	
	if ( response->errstat != SNMP_ERR_NOERROR )
	{
		kdWarning() << "Error in packet: " << snmp_errstring(response->errstat) << endl;
		snmp_free_pdu(response);
		return false;
	}

	variable_list *var = response->variables;
	int i = startIndex;
	while( var )
	{
		retvars[i] = snmpvarToVariant(var);
		i++;
		var = var->next_variable;
	}
	
	snmp_free_pdu(response);
	
	return true;
}

int collect_mem(netsnmp_session *ss, struct memStats *mem)
{
    netsnmp_pdu    *pdu;
    netsnmp_pdu    *response;
    int status;
    int ret = 0;

    pdu = snmp_pdu_create(SNMP_MSG_GET);
    add(pdu, "UCD-SNMP-MIB:memTotalSwap.0", NULL, 0);
    add(pdu, "UCD-SNMP-MIB:memAvailSwap.0", NULL, 0);
    add(pdu, "UCD-SNMP-MIB:memTotalReal.0", NULL, 0);
    add(pdu, "UCD-SNMP-MIB:memAvailReal.0", NULL, 0);
    add(pdu, "UCD-SNMP-MIB:memShared.0", NULL, 0);
    add(pdu, "UCD-SNMP-MIB:memBuffer.0", NULL, 0);
    add(pdu, "UCD-SNMP-MIB:memCached.0", NULL, 0);

    status = snmp_synch_response(ss, pdu, &response);
    memset(mem, 0, sizeof(*mem));
    if (status != STAT_SUCCESS || !response ||
            response->errstat != SNMP_ERR_NOERROR) {
        goto out;
    }
    else {
        netsnmp_variable_list *vlp = response->variables;
        if (vlp->type == SNMP_NOSUCHOBJECT) goto out;
        mem->totalSwap = *vlp->val.integer;
        vlp = vlp->next_variable;
        if (vlp->type == SNMP_NOSUCHOBJECT) goto out;
        mem->availSwap = *vlp->val.integer;
        vlp = vlp->next_variable;
        if (vlp->type == SNMP_NOSUCHOBJECT) goto out;
        mem->totalReal = *vlp->val.integer;
        vlp = vlp->next_variable;
        if (vlp->type == SNMP_NOSUCHOBJECT) goto out;
        mem->availReal = *vlp->val.integer;
        vlp = vlp->next_variable;

        ret = 1;

        if (vlp->type == SNMP_NOSUCHOBJECT) goto out;
        mem->shared = *vlp->val.integer;
        vlp = vlp->next_variable;
        if (vlp->type == SNMP_NOSUCHOBJECT) goto out;
        mem->buffer = *vlp->val.integer;
        vlp = vlp->next_variable;
        if (vlp->type == SNMP_NOSUCHOBJECT) goto out;
        mem->cached = *vlp->val.integer;
    }
out:
    if (response) snmp_free_pdu(response);
    return ret;
}

static std::unique_ptr<::snmp_pdu, pdu_deleter> perform_request(::snmp_session * session,
                                                                ::snmp_pdu * request)
{
    struct snmp_pdu * unsafe_response;
    auto status = snmp_synch_response(session, request, &unsafe_response);

    std::unique_ptr<::snmp_pdu, pdu_deleter> response(unsafe_response);

    if (status != STAT_SUCCESS) throw snmp::session_error(session);
    if (response->errstat != SNMP_ERR_NOERROR) throw snmp::protocol_error(response->errstat);

    return response;
}