ACI API 26.3
ACI API Programming Guide

# Constants

The constants that are used in the C language SDK are outlined in the following table.

Constants used in C-language functions

Constant | Description
--- | ---
`ACI_COMMAND` | Indicates that you want to create an `ACI_COMMAND` type ACI object. This constant is used by only the `aciObjectCreate` function.
`ACI_COM_COMMAND` | Indicates that the specified parameter is an action command. This constant is used by only the `aciObjectParamSetString` function on an `ACI_COMMAND` type ACI object.
`ACI_COM_USE_POST` | Indicates whether to use GET or POST when sending data to the server. This constant is used by only the `aciObjectParamSetBool` function on an `ACI_COMMAND` type ACI object.
`ACI_CONNECTION` | Indicates that you want to create an `ACI_CONNECTION` type ACI object. This constant is used by only the `aciObjectCreate` function.
`ACI_CONN_ENCRYPTION` | Indicates whether to encrypt communications with the ACI server. This constant is used by only the `aciObjectParamSetBool` function on an `ACI_CONNECTION` type ACI object. (You must also specify an encryption type if you want to encrypt communications.)
`ACI_CONN_ENCRYPTION_TYPE` | Indicates that the specified parameter is the encryption type to use for communications with the ACI server. This constant is used by only the `aciObjectParamSetString` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_ENCRYPTION_TYPE_GSS` | Sets the GSS encryption type with which to encrypt communications with the ACI server. This constant is used by only the `aciObjectParamSetString` function that sets the `ACI_CONN_ENCRYPTION_TYPE` on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_ENCRYPTION_TYPE_TEA` | Sets the TEA encryption type with which to encrypt communications with the ACI server. This constant is used by only the `aciObjectParamSetString` function that sets the `ACI_CONN_ENCRYPTION_TYPE` on an `ACI_CONNECTION` type ACI object.
`ACI_CONNECTION_REALM_KEY` | Sets the realm key of GSS encryption with which to encrypt communications with the ACI server. This constant is used by only the `aciObjectParamSetString` function on an `ACI_CONNECTION` type ACI object with `ACI_CONN_ENCRYPTION_TYPE_GSS` encryption type.
`ACI_CONNECTION_SERVICE_KEY` | Sets the service key of GSS encryption with which to encrypt communications with the ACI server. This constant is used by only the `aciObjectParamSetString` function on an `ACI_CONNECTION` type ACI object with `ACI_CONN_ENCRYPTION_TYPE_GSS` encryption type.
`ACI_CONN_HTTPHEADER_XFORWARDEDFOR` | Sets the X-Forwarded-For HTTP header.
`ACI_CONN_RETRIES` | Indicates that the specified parameter is the number of times a connection is retried. This constant is used by only the `aciObjectParamSetInt` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_TCP_RCVBUF` | Sets the size of the socket receive buffer `SO_RCVBUF`.
`ACI_CONN_USE_DEFLATE` | Indicates that the specified parameter specifies whether to use deflate compression in HTTP requests. This constant is used by only the `aciObjectParamSetBool` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_TIMEOUT` | Indicates that the specified parameter is the timeout used in the connection. This constant is used by only the `aciObjectParamSetInt` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_TIMEOUT_READ` | Indicates that the specified parameter is the timeout for how long the connection waits to read data. If you do not set this constant, the connection uses the `ACI_CONN_TIMEOUT` value as the timeout for both the initial connect or send request phase and the retrieving data phase of the ACI request. This constant is used by only the `aciObjectParamSetInt` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_TIMEOUT_READ_ERROR` | Indicates that the specified parameter specifies whether to use a separate error for connection timeouts at the read stage. You can use this parameter to return separate `ACICONTENT_ERRORTIMEOUTREAD` and `ACICONTENT_ERRORTIMEOUT` return codes. This constant is used by only the `aciObjectParamSetBool` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_USE_SSL` | Indicates that the specified parameter specifies whether to use HTTPS requests. This constant is used by only the `aciObjectParamSetBool` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_SSL_CERTIFICATE` | Indicates that the specified parameter gives the location on disk of the SSL certificate to be used for HTTPS requests. This constant is used by only the `aciObjectParamSetString` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_SSL_PRIVATEKEY` | Indicates that the specified parameter gives the location on disk of the SSL private key file matching the SSL certificate to be used for HTTPS requests. This constant is used by only the `aciObjectParamSetString` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_SSL_CHECKCOMMONNAME` | Indicates that the specified parameter specifies whether to check that the CommonName (CN) attribute of the SSL certificate returned by the peer resolves to the same IP address of the hostname. This constant is used by only the `aciObjectParamSetBool` function on an `ACI_CONNECTION` type ACI object.
`ACI_CONN_SSL_CACERTIFICATE` | Indicates that the specified parameter gives the location on disk of the SSL Certificate Authority (CA) certificate of a trusted authority to be used for HTTPS requests. Communication with a peer is only trusted if it provides a certificate signed by the specified CAs. This constant is used by only the `aciObjectParamSetString` function on an `ACI_CONNECTION` type ACI object.
`ACI_DATA` | Indicates that you want to create an `ACI_DATA` type ACI object. This constant is used by only the `aciObjectCreate` function.
`ACI_DATA_DATA` | Indicates that the specified parameter is all data that the server has returned. This constant is used by only the `aciObjectParamGetString` function on an `ACI_DATA` type ACI object.
`ACI_DATA_NODE_NAME` | Indicates that the specified parameter is the node name. This constant is used by only the `aciObjectParamGetString` function on an `ACI_DATA` type ACI object.
`ACI_DATA_NODE_VALUE` | Indicates that the specified parameter is the node value. This constant is used by only the `aciObjectParamGetString` function on an `ACI_DATA` type ACI object.
`ACI_HOSTNAME` | Indicates that the specified parameter is the IP address (or name) of the ACI server. This constant is used by only the `aciObjectParamSetString` function on an `ACI_CONNECTION` type ACI object.
`ACI_PORTNUMBER` | Indicates that the specified parameter is the port number that is used to communicate with the ACI server. This constant is only used by the `aciObjectParamSetInt` function on an `ACI_CONNECTION` type ACI object.
`ACI_SECURITY_DOMAIN` | Indicates that the specified value is a domain name. This constant is used by only the `aciObjectSetUserSecurityInfo` function on an `ACI_COMMAND` type ACI object.
`ACI_SECURITY_EXTENDED` | Indicates that the specified value is the value for an additional field used for security in this repository. This constant is used by only the `aciObjectSetUserSecurityInfo` function on an `ACI_COMMAND` type ACI object.
`ACI_SECURITY_GROUP` | Indicates that the specified value is a user group name. This constant is used by only the `aciObjectSetUserSecurityInfo` function on an `ACI_COMMAND` type ACI object.
`ACI_SECURITY_PASSWORD` | Indicates that the specified value is a password. This constant is used by only the `aciObjectSetUserSecurityInfo` function on an `ACI_COMMAND` type ACI object.
`ACI_SECURITY_USERNAME` | Indicates that the specified value is a user name. This constant is used by only the `aciObjectSetUserSecurityInfo` function on an `ACI_COMMAND` type ACI object.

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Version 26.3 | Last updated July 2026

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Product: Knowledge Discovery ACI API 26.3

Topic Title: Constants