RADIUS Options
RADIUS Attribute Types
Predefined Constants
PHP Manual

## RADIUS Packet Types

RADIUS packets, whether requests or responses, always include a type. These constants are provided to make it easier to specify types when using radius_create_request() and when comparing the result of radius_send_request().

`RADIUS_ACCESS_REQUEST` (integer)

  An Access-Request, used to authenticate a user against a RADIUS server. Access request packets must include a `RADIUS_NAS_IP_ADDRESS` or a `RADIUS_NAS_IDENTIFIER` attribute, must also include a `RADIUS_USER_PASSWORD`, `RADIUS_CHAP_PASSWORD` or a `RADIUS_STATE` attribute, and should include a `RADIUS_USER_NAME` attribute.

`RADIUS_ACCESS_ACCEPT` (integer)

  An Access-Accept response to an Access-Request indicating that the RADIUS server authenticated the user successfully.

`RADIUS_ACCESS_REJECT` (integer)

  An Access-Reject response to an Access-Request indicating that the RADIUS server could not authenticate the user.

`RADIUS_ACCESS_CHALLENGE` (integer)

  An Access-Challenge response to an Access-Request indicating that the RADIUS server requires further information in another Access-Request before authenticating the user.

`RADIUS_ACCOUNTING_REQUEST` (integer)

  An Accounting-Request, used to convey accounting information for a service to the RADIUS server.

`RADIUS_ACCOUNTING_RESPONSE` (integer)

  An Accounting-Response response to an Accounting-Request.

`RADIUS_COA_REQUEST` (integer)

  A CoA-Request, sent from the RADIUS server to indicate that the authorisations within the user session have changed. A response must be sent in the form of a CoA-ACK or a CoA-NAK.

  This constant is available in PECL radius 1.3.0 and later.

`RADIUS_COA_ACK` (integer)

  A CoA-ACK, sent to the RADIUS server to indicate that the user authorisations have been updated.

  This constant is available in PECL radius 1.3.0 and later.

`RADIUS_COA_NAK` (integer)

  A CoA-NAK, sent to the RADIUS server to indicate that the user authorisations could not be updated.

  This constant is available in PECL radius 1.3.0 and later.

`RADIUS_DISCONNECT_REQUEST` (integer)

  A Disconnect-Request, sent from the RADIUS server to indicate that the user session must be terminated.

  This constant is available in PECL radius 1.3.0 and later.

`RADIUS_DISCONNECT_ACK` (integer)

  A Disconnect-ACK, sent to the RADIUS server to indicate that the user session has been terminated.

  This constant is available in PECL radius 1.3.0 and later.

`RADIUS_DISCONNECT_NAK` (integer)

  A Disconnect-NAK, sent to the RADIUS server to indicate that the user session could not be terminated.

  This constant is available in PECL radius 1.3.0 and later.

RADIUS Options
RADIUS Attribute Types
Predefined Constants
PHP Manual