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CDC_PARSE_CDC_HEADER(9) USB Core APIs CDC_PARSE_CDC_HEADER(9)

NAME

cdc_parse_cdc_header - parse the extra headers present in CDC devices

SYNOPSIS

int cdc_parse_cdc_header(struct usb_cdc_parsed_header * hdr, struct usb_interface * intf, u8 * buffer, int buflen);

ARGUMENTS

hdr
the place to put the results of the parsing
intf
the interface for which parsing is requested
buffer
pointer to the extra headers to be parsed
buflen
length of the extra headers

DESCRIPTION

This evaluates the extra headers present in CDC devices which bind the interfaces for data and control and provide details about the capabilities of the device.

RETURN

number of descriptors parsed or -EINVAL if the header is contradictory beyond salvage

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.