自学教程：C++ snmp_parse_oid函数代码示例

void view_oid (oid * it, size_t * len, const char *viewName, char *viewSubtree){    int i;    oid c_oid[SPRINT_MAX_LEN];    size_t c_oid_length = SPRINT_MAX_LEN;    int itIndex = VIEW_OID_LEN;    if (!snmp_parse_oid (viewSubtree, c_oid, &c_oid_length))    {        printf ("Error parsing subtree (%s)/n", viewSubtree);        exit (1);    }    *len = itIndex + 2 + strlen (viewName) + c_oid_length;    it[itIndex++] = strlen (viewName);    for (i = 0; i < (int) strlen (viewName); i++)        it[itIndex++] = viewName[i];    it[itIndex++] = c_oid_length;    for (i = 0; i < (int) c_oid_length; i++)        it[itIndex++] = c_oid[i];    /*     * sprint_objid(c_oid, it, *len);      */}

intadd(netsnmp_pdu *pdu, const char *mibnodename,    oid * index, size_t indexlen){    oid             base[MAX_OID_LEN];    size_t          base_length = MAX_OID_LEN;    memset(base, 0, MAX_OID_LEN * sizeof(oid));    if (!snmp_parse_oid(mibnodename, base, &base_length)) {        snmp_perror(mibnodename);        fprintf(stderr, "couldn't find mib node %s, giving up/n",                mibnodename);#if HAVE_CURSES_H        endwin();#endif        exit(1);    }    if (index && indexlen) {        memcpy(&(base[base_length]), index, indexlen * sizeof(oid));        base_length += indexlen;    }    DEBUGMSGTL(("add", "created: "));    DEBUGMSGOID(("add", base, base_length));    DEBUGMSG(("add", "/n"));    snmp_add_null_var(pdu, base, base_length);    return base_length;}

/** * The 'raw' SNMP set function. It should not be used directly in external * files. Rather, a non-static wrapper function should be created here that * makes the appropriate call in order to preserve source code readability. * * @return 1 if successful, 0 if not */static int snmp_set(netsnmp_session *s, char *oid_str, char type, const char *val){	netsnmp_pdu *pdu;	oid the_oid[MAX_OID_LEN];	size_t oid_len;	pdu = snmp_pdu_create(SNMP_MSG_SET);	oid_len = MAX_OID_LEN;	// Parse the OID	if (snmp_parse_oid(oid_str, the_oid, &oid_len) == 0) {		snmp_perror(oid_str);		return 0;	}	// Build the packet to be sent	if (snmp_add_var(pdu, the_oid, oid_len, type, val) != 0) {		printf("type: %c, val: %s, oid_str: %s/n", type, val, oid_str);		snmp_perror("SNMP: Could not add var!");		return 0;	}	// Send the request	if (snmp_send(s, pdu) == 0) {		snmp_perror("SNMP: Error while sending!");		snmp_free_pdu(pdu);		return 0;	}	return 1;}

voidsimpleSNMPsend(struct snmp_session *session,	       oid *name,	       size_t name_length){    struct snmp_pdu *pdu;    oid uptime[MAX_OID_LEN];    size_t uptime_length;    /*      * Create PDU for GET request and add object names to request.     */    pdu = snmp_pdu_create(SNMP_MSG_GET);    /*      * First insert uptime request into PDU.     */    uptime_length = MAX_OID_LEN;    if (!snmp_parse_oid("system.sysUpTime.0",			uptime, &uptime_length)) {	    printf("error parsing oid: system.sysUpTime.0/n");    }    snmp_add_null_var(pdu, uptime, uptime_length);    snmp_add_null_var(pdu, name, name_length);    /*      * Perform the request.     */    snmp_send(session, pdu);}

static inline void add_field (	netsnmp_pdu *trap_pdu,	u_char asn_type,	const char *prefix,	void *value,	size_t value_size){	oid _oid[MAX_OID_LEN];	size_t _oid_len = MAX_OID_LEN;	if (snmp_parse_oid(prefix, _oid, &_oid_len)) {		snmp_pdu_add_variable (trap_pdu, _oid, _oid_len, asn_type, (u_char *) value, value_size);	}}

static int csnmp_config_add_data_values (data_definition_t *dd, oconfig_item_t *ci){  int i;  if (ci->values_num < 1)  {    WARNING ("snmp plugin: `Values' needs at least one argument.");    return (-1);  }  for (i = 0; i < ci->values_num; i++)    if (ci->values[i].type != OCONFIG_TYPE_STRING)    {      WARNING ("snmp plugin: `Values' needs only string argument.");      return (-1);    }  sfree (dd->values);  dd->values_len = 0;  dd->values = (oid_t *) malloc (sizeof (oid_t) * ci->values_num);  if (dd->values == NULL)    return (-1);  dd->values_len = (size_t) ci->values_num;  for (i = 0; i < ci->values_num; i++)  {    dd->values[i].oid_len = MAX_OID_LEN;    if (NULL == snmp_parse_oid (ci->values[i].value.string,          dd->values[i].oid, &dd->values[i].oid_len))    {      ERROR ("snmp plugin: snmp_parse_oid (%s) failed.",          ci->values[i].value.string);      free (dd->values);      dd->values = NULL;      dd->values_len = 0;      return (-1);    }  }  return (0);} /* int csnmp_config_add_data_instance */

static void add_pdu_var(netsnmp_pdu *pdu, const char *mib_name, int id, const char *value){	oid oid_name[MAX_OID_LEN];	size_t name_length;	char buf[4096];	buf[4095] = '/0';	snprintf(buf, sizeof(buf)-1, "%s.%d", mib_name, id);	name_length = MAX_OID_LEN;	if (snmp_parse_oid(buf, oid_name, &name_length) == NULL) {		snmp_perror(buf);		return;	}	if (snmp_add_var(pdu, oid_name, name_length, '=', value)) {		snmp_perror(buf);		return;	}}

int main(int argc, char ** argv){    netsnmp_session session, *ss;    netsnmp_pdu *pdu;    netsnmp_pdu *response;    oid anOID[MAX_OID_LEN];    size_t anOID_len;    netsnmp_variable_list *vars;    int status;    int count=1;    /*     * Initialize the SNMP library     */    init_snmp("snmpdemoapp");    /*     * Initialize a "session" that defines who we're going to talk to     */    snmp_sess_init( &session );                   /* set up defaults */    session.peername = strdup("test.net-snmp.org");    /* set up the authentication parameters for talking to the server */#ifdef DEMO_USE_SNMP_VERSION_3    /* Use SNMPv3 to talk to the experimental server */    /* set the SNMP version number */    session.version=SNMP_VERSION_3;            /* set the SNMPv3 user name */    session.securityName = strdup("MD5User");    session.securityNameLen = strlen(session.securityName);    /* set the security level to authenticated, but not encrypted */    session.securityLevel = SNMP_SEC_LEVEL_AUTHNOPRIV;    /* set the authentication method to MD5 */    session.securityAuthProto = usmHMACMD5AuthProtocol;    session.securityAuthProtoLen = sizeof(usmHMACMD5AuthProtocol)/sizeof(oid);    session.securityAuthKeyLen = USM_AUTH_KU_LEN;    /* set the authentication key to a MD5 hashed version of our       passphrase "The Net-SNMP Demo Password" (which must be at least 8       characters long) */    if (generate_Ku(session.securityAuthProto,                    session.securityAuthProtoLen,                    (u_char *) our_v3_passphrase, strlen(our_v3_passphrase),                    session.securityAuthKey,                    &session.securityAuthKeyLen) != SNMPERR_SUCCESS) {        snmp_perror(argv[0]);        snmp_log(LOG_ERR,                 "Error generating Ku from authentication pass phrase. /n");        exit(1);    }    #else /* we'll use the insecure (but simplier) SNMPv1 */    /* set the SNMP version number */    session.version = SNMP_VERSION_1;    /* set the SNMPv1 community name used for authentication */    session.community = "demopublic";    session.community_len = strlen(session.community);#endif /* SNMPv1 */    /*     * Open the session     */    SOCK_STARTUP;    ss = snmp_open(&session);                     /* establish the session */    if (!ss) {      snmp_sess_perror("ack", &session);      SOCK_CLEANUP;      exit(1);    }        /*     * Create the PDU for the data for our request.     *   1) We're going to GET the system.sysDescr.0 node.     */    pdu = snmp_pdu_create(SNMP_MSG_GET);    anOID_len = MAX_OID_LEN;    if (!snmp_parse_oid(".1.3.6.1.2.1.1.1.0", anOID, &anOID_len)) {      snmp_perror(".1.3.6.1.2.1.1.1.0");      SOCK_CLEANUP;      exit(1);    }#if OTHER_METHODS    /*     *  These are alternatives to the 'snmp_parse_oid' call above,     *    e.g. specifying the OID by name rather than numerically.     */    read_objid(".1.3.6.1.2.1.1.1.0", anOID, &anOID_len);    get_node("sysDescr.0", anOID, &anOID_len);//.........这里部分代码省略.........

/** * Bulk walk snmp value to the structure my_oid_result array. * Author : lining 15810423651 [email
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