#define DLC_ENABLE_SAP 1
#define DLC_DISABLE_SAP 2
#define DLC_START_LS 3
#define DLC_HALT_LS 4
#define DLC_TRACE 5
#define DLC_CONTACT 6
#define DLC_TEST 7
#define DLC_ALTER 8
#define DLC_QUERY_SAP 9
#define DLC_QUERY_LS 10
#define DLC_ENTER_LBUSY 11
#define DLC_EXIT_LBUSY 12
#define DLC_ENTER_SHOLD 13
#define DLC_EXIT_SHOLD 14
#define DLC_GET_EXCEP 15
#define DLC_ADD_GRP 16
#define DLC_ADD_FUNC_ADDR 17
#define DLC_DEL_FUNC_ADDR 18
#define DLC_DEL_GRP 19
#define IOCINFO /* see /usr/include/sys/ioctl.h */
Each GDLC supports a subset of ioctl subroutine operations. These ioctl operations are selectable through the fp_ioctl kernel service or the ioctl subroutine. They may be called from the process environment only.
The following ioctl command operations are supported for generic data link control (GDLC):
| Operation | Description |
|---|---|
| DLC_ADD_FUNC_ADDR | Adds a group or multicast receive functional address to a
port. This command allows additional functional address bits to be
added to the current receive functional address mask, as supported
by the individual device handlers. See device handler specifications
to determine which address values are supported. Note: Currently,
token ring is the only local area network (LAN) protocol supporting
functional addresses.
|
| DLC_ADD_GRP | Adds a group or multicast receive address to a port. This command allows additional address values to be filtered in receive as supported by the individual communication device handlers. See device handler specifications to determine which address values are supported. |
| DLC_ALTER | Alters link station (LS) configuration. |
| DLC_CONTACT | Contacts the remote LS. This ioctl operation does not complete processing before returning to the user. The DLC_CONTACT notification is returned asynchronously to the user by way of exception. |
| DLC_DEL_GRP | Removes a group or multicast address that was previously added to a port with a DLC_ENABLE_SAP or DLC_ADD_GRP ioctl operation. |
| DLC_DEL_FUNC_ADDR | Removes a group or multicast receive functional address from
a port. This command removes functional address bits from the current
receive functional address mask, as supported by the individual device
handlers. See device handler specifications to determine which address
values are supported. Note: Currently, token ring is the only local
area network protocol supporting functional addresses.
|
| DLC_DISABLE_SAP | Disables a service access point (SAP). This ioctl operation does not fully complete the disable SAP processing before returning to the user. The DLC_DISABLE_SAP notification is returned asynchronously to the user later by way of exception. |
| DLC_ENABLE_SAP | Enables an SAP. This ioctl operation does not fully complete the enable SAP processing before returning to the user. The DLC_ENABLE_SAP notification is returned asynchronously to the user later by way of exception. |
| DLC_ENTER_LBUSY | Enters local busy mode on an LS. |
| DLC_ENTER_SHOLD | Enters short hold mode on an LS. |
| DLC_EXIT_LBUSY | Exits local busy mode on an LS. |
| DLC_EXIT_SHOLD | Exits short hold mode on an LS. |
| DLC_GET_EXCEP | Returns asynchronous exception notifications to the application
user. Note: This ioctl command operation is not used by the kernel
user since all exception conditions are passed to the kernel user
by their exception handler routine.
|
| DLC_HALT_LS | Halts an LS. This ioctl operation does not complete processing before returning to the user. Notification of the ioctl operation, DLC_HALT_LS, is returned asynchronously to the user by way of exception. |
| DLC_QUERY_LS | Queries an LS. |
| DLC_QUERY_SAP | Queries an SAP. |
| DLC_START_LS | Starts an LS. This ioctl operation does not complete processing before returning to the user. Notification of the ioctl operation, DLC_START_LS, is returned asynchronously to the user by way of exception. |
| DLC_TEST | Tests LS connectivity. This ioctl operation does not complete processing before returning to the user. Notification of the ioctl operation, DLC_TEST completion, is returned asynchronously to the user by way of exception. |
| DLC_TRACE | Traces LS activity. |
| IOCINFO | Returns a structure that describes the device. Refer to the description of the /usr/include/sys/devinfo.h file. The first byte is set to an ioctype of DD_DLC. The subtype and data are defined by the individual DLC devices. |