6.3. ioctl NET_GET_IF

6.3.1. Name

NET_GET_IF - Read the configuration data of an interface created via - NET_ADD_IF.

6.3.2. Synopsis

int ioctl(int fd, NET_GET_IF, struct dvb_net_if *net_if)

6.3.3. Arguments

fd

File descriptor returned by open().

net_if

pointer to struct dvb_net_if

6.3.4. Description

The NET_GET_IF ioctl uses the interface number given by the struct dvb_net_if::ifnum field and fills the content of struct dvb_net_if with the packet ID and encapsulation type used on such interface. If the interface was not created yet with NET_ADD_IF, it will return -1 and fill the errno with EINVAL error code.

6.3.5. Return Value

On success 0 is returned, on error -1 and the errno variable is set appropriately. The generic error codes are described at the Generic Error Codes chapter.