The DLC_DEL_GRP ioctl operation is selectable through the fp_ioctl kernel service or the ioctl subroutine. It can be called from the process environment only.
The following parameter removes a previously defined group or multicast address:
struct dlc_add_grp
{
__ulong32_t gdlc_sap_corr; /*GDLC SAP correlator */
__ulong32_t grpaddr_len; /*group address length */
uchar_t grp_addr[DLC_MAX_ADDR]; /*group address to be
removed */
};
The fields of this ioctl operation are:
| Field | Description |
|---|---|
| gdlc_sap_corr | Indicates the generic data link control (GDLC) service access point (SAP) identifier being requested to remove a group or multicast address from a port. This field is known as the GDLC SAP Correlator field. |
| grp_addr_len | Contains the byte length of the group or multicast address to be removed. |
| grp_addr | Contains the group or multicast address to be removed. |