func fill_pdu_for_test_crypt(is_encrypt bool, pt C.enum_snmp_privacy, salt, key, data []byte) ([]byte, error) {
var digest [100000]byte
var pdu C.snmp_pdu_t
C.snmp_pdu_init(&pdu)
pdu.user.priv_proto = pt
C.memcpy(unsafe.Pointer(&pdu.user.priv_key[0]), unsafe.Pointer(&key[0]), C.size_t(C.SNMP_PRIV_KEY_SIZ))
pdu.user.priv_len = C.size_t(16) //C.size_t(C.SNMP_PRIV_KEY_SIZ) //(au == SNMP_PRIV_DES ) ? SNMP_AUTH_HMACMD5_KEY_SIZ : SNMP_AUTH_HMACSHA_KEY_SIZ;
pdu.engine.engine_boots = 3
pdu.engine.engine_time = 3
C.memcpy(unsafe.Pointer(&pdu.msg_salt[0]), unsafe.Pointer(&salt[0]), 8)
copy(digest[:], data)
pdu.scoped_ptr = (*C.u_char)(unsafe.Pointer(&digest[0]))
pdu.scoped_len = C.size_t((len(data) / 8) * 8)
var ret_code C.enum_snmp_code
if is_encrypt {
ret_code = C.snmp_pdu_encrypt(&pdu)
} else {
ret_code = C.snmp_pdu_decrypt(&pdu)
}
if 0 != ret_code {
err := errors.New(C.GoString(C.snmp_pdu_get_error(&pdu, ret_code)))
return nil, err
}
return readGoBytes((*C.uint8_t)(pdu.scoped_ptr), C.uint32_t(pdu.scoped_len)), nil
}
func debug_init_secparams(pdu *C.snmp_pdu_t) {
if pdu.user.auth_proto != C.SNMP_AUTH_NOAUTH {
pdu.flags |= C.SNMP_MSG_AUTH_FLAG
}
switch pdu.user.priv_proto {
case C.SNMP_PRIV_DES:
memcpy(&pdu.msg_salt[0], 8, debug_salt)
pdu.flags |= C.SNMP_MSG_PRIV_FLAG
case C.SNMP_PRIV_AES:
memcpy(&pdu.msg_salt[0], 8, debug_salt)
pdu.flags |= C.SNMP_MSG_PRIV_FLAG
}
}
func encodeBindings(internal *C.snmp_pdu_t, vbs *VariableBindings) SnmpError {
if SNMP_MAX_BINDINGS < vbs.Len() {
return Errorf(SNMP_CODE_FAILED, "bindings too long, SNMP_MAX_BINDINGS is %d, variableBindings is %d",
SNMP_MAX_BINDINGS, vbs.Len())
}
for i, vb := range vbs.All() {
err := oidWrite(&internal.bindings[i].oid, &vb.Oid)
if nil != err {
internal.nbindings = C.u_int(i) + 1 // free
return err
}
if nil == vb.Value {
internal.bindings[i].syntax = uint32(SNMP_SYNTAX_NULL)
continue
}
internal.bindings[i].syntax = uint32(vb.Value.GetSyntax())
switch vb.Value.GetSyntax() {
case SNMP_SYNTAX_NULL:
case SNMP_SYNTAX_INTEGER:
C.snmp_value_put_int32(&internal.bindings[i].v, C.int32_t(vb.Value.GetInt32()))
case SNMP_SYNTAX_OCTETSTRING:
send_bytes := vb.Value.GetBytes()
if nil != send_bytes && 0 != len(send_bytes) {
C.snmp_value_put_octets(&internal.bindings[i].v, unsafe.Pointer(&send_bytes[0]), C.u_int(len(send_bytes)))
} else {
C.snmp_value_put_octets(&internal.bindings[i].v, nil, C.u_int(0))
}
case SNMP_SYNTAX_OID:
err = oidWrite(C.snmp_value_get_oid(&internal.bindings[i].v), vb.Value)
if nil != err {
internal.nbindings = C.u_int(i) + 1 // free
return err
}
case SNMP_SYNTAX_IPADDRESS:
send_bytes := vb.Value.GetBytes()
if 4 != len(send_bytes) {
internal.nbindings = C.u_int(i) + 1 // free
return Errorf(SNMP_CODE_FAILED, "ip address is error, it's length is %d, excepted length is 4, value is %s",
len(send_bytes), vb.Value.String())
}
C.snmp_value_put_ipaddress(&internal.bindings[i].v, C.u_char(send_bytes[0]),
C.u_char(send_bytes[1]), C.u_char(send_bytes[2]), C.u_char(send_bytes[3]))
case SNMP_SYNTAX_COUNTER:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_GAUGE:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_TIMETICKS:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_COUNTER64:
uint64_to_counter64(vb.Value.GetUint64(), &internal.bindings[i].v)
//cs := C.CString(s)
//defer C.free(unsafe.Pointer(cs))
//C.snmp_value_put_uint64_str(&internal.bindings[i].v, cs)
//C.snmp_value_put_uint64(&internal.bindings[i].v, C.uint64_t(vb.Value.GetUint64()))
default:
internal.nbindings = C.u_int(i) + 1 // free
return Errorf(SNMP_CODE_FAILED, "unsupported type - %v", vb.Value)
}
}
internal.nbindings = C.u_int(vbs.Len())
return nil
}