Sending V3 trap to multiple hosts

Hi,

following my code used in order to send the same V3 trap to multiple hosts.

Now, this is en example scenario: Host #1 with wrong V3 credentials Host #2
with correct V3 credentials

V3 trap not sent to host #1 => OK because I've wrong credentials V3 trap
*not* sent to host #2 => NOK because I've correct credentials

Why? It seems SNMP session related to host #2 "inherits" something from
host #1 session.

Thanks for your help.


void MyClass::sendV3Trap(string p_notificationDescriptor, const
vector<GcpfTrapVariable>& p_trapVariables)
   {
    // SNMP system OID of trap
    oid objid_snmptrap[]= { 1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0 };
    // for each configured remote hosts
    for (...)
    {
        netsnmp_session session;
        char* p_posix = strdup("POSIXLY_CORRECT=1");
        putenv(p_posix);
        // inits the SNMP session
        snmp_sess_init(&session);
        // SNMP version
        session.version = SNMP_VERSION_3;
        // manages the security name
        session.securityName= "snmpuser";
        session.securityNameLen= strlen("snmpuser");
        // security level is Auth-Priv
        session.securityLevel= SNMP_SEC_LEVEL_AUTHPRIV;
        // manages auth protocol (for example MD5)
        session.securityAuthProto= usmHMACMD5AuthProtocol;
        session.securityAuthProtoLen= USM_AUTH_PROTO_MD5_LEN;
        // manages priv protocol (for example DES)
        session.securityPrivProto= usmDESPrivProtocol;
        session.securityPrivProtoLen= USM_PRIV_PROTO_DES_LEN;
        // manages auth password
        char* Apsz= "authPassword";
        // manages priv password
        char* Xpsz= "privPassword";
        //
        init_snmp("gcpf_trap_sender");
        // makes master key from pass phrases
        session.securityAuthKeyLen= USM_AUTH_KU_LEN;
        if (SNMPERR_SUCCESS!= generate_Ku(session.securityAuthProto,
session.securityAuthProtoLen, (u_char*)Apsz, strlen(Apsz),
session.securityAuthKey, &session.securityAuthKeyLen))
            printf("Error generating a key (Ku) from the supplied
authentication pass phrase");
        session.securityPrivKeyLen= USM_PRIV_KU_LEN;
        if (SNMPERR_SUCCESS!= generate_Ku(session.securityAuthProto,
session.securityAuthProtoLen, (u_char*)Xpsz, strlen(Xpsz),
session.securityPrivKey, &session.securityPrivKeyLen))
            printf("Error generating a key (Ku) from the supplied
privacy pass phrase");
        // peer name (IP address and port of the remote host)
        session.peername= ...;
        // socket and callbacks
        SOCK_STARTUP;
        session.callback = NULL;
        session.callback_magic = NULL;
        // setup the local engineID which may be for either or both of the
        // contextEngineID and/or the securityEngineID
        setup_engineID(NULL, NULL);
        // use our internal engineID as the context
        session.contextEngineID=
snmpv3_generate_engineID(&session.contextEngineIDLen);
        // sets the engine ID
        size_t ebuf_len= 32;
        size_t eout_len= 0;
        u_char* ebuf= (u_char*)malloc(ebuf_len);
        char* optarg= "0x8000000001";
        if (!snmp_hex_to_binary(&ebuf, &ebuf_len, &eout_len, 1, optarg))
            printf("Bad engine ID value specified in the config file");
        if ((eout_len < 5) || (eout_len > 32))
            printf("Invalid engine ID value specified in the config file");
        session.securityEngineID = ebuf;
        session.securityEngineIDLen = eout_len;
        //
        session.engineBoots= 1;
        //
        session.engineTime= get_uptime();
        netsnmp_session* ss= snmp_add(&session,
netsnmp_transport_open_client("snmptrap", session.peername), NULL,
NULL);
        if (NULL== ss)
            printf("Error snmp_add");
        else
        {
            netsnmp_pdu* pdu= snmp_pdu_create(SNMP_MSG_TRAP2);
            pdu->trap_type = SNMP_TRAP_ENTERPRISESPECIFIC;
            if (!pdu)
                printf("Failed to create notification PDU");
            else
            {
                // for each variable of the trap
                for (...)
                    snmp_add_var(pdu, it->m_trapVariableOid,
sizeof(it->m_trapVariableOid) / sizeof(oid), it->m_trapVariableType,
it->m_trapVariableValue.c_str());
                snmp_add_var(pdu, objid_snmptrap,
sizeof(objid_snmptrap) / sizeof(oid), 'o',
p_notificationDescriptor.c_str());
                    send_trap_to_sess (ss, pdu);
                    snmp_free_pdu(pdu);
                    snmp_close(ss);
            }
        }
    } // end for}

------------------------------------------------------------------------------
Go from Idea to Many App Stores Faster with Intel(R) XDK
Give your users amazing mobile app experiences with Intel(R) XDK.
Use one codebase in this all-in-one HTML5 development environment.
Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs.
http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140

_______________________________________________
Net-snmp-users mailing list
[email protected]
Please see the following page to unsubscribe or change other options:
https://lists.sourceforge.net/lists/listinfo/net-snmp-users