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/** @file
Definition of IP6 option process routines.
Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __EFI_IP6_OPTION_H__
#define __EFI_IP6_OPTION_H__
#define IP6_FRAGMENT_OFFSET_MASK (~0x3)
typedef struct _IP6_FRAGMENT_HEADER {
UINT8 NextHeader;
UINT8 Reserved;
UINT16 FragmentOffset;
UINT32 Identification;
} IP6_FRAGMENT_HEADER;
typedef struct _IP6_ROUTING_HEADER {
UINT8 NextHeader;
UINT8 HeaderLen;
UINT8 RoutingType;
UINT8 SegmentsLeft;
} IP6_ROUTING_HEADER;
typedef enum {
Ip6OptionPad1 = 0,
Ip6OptionPadN = 1,
Ip6OptionRouterAlert = 5,
Ip6OptionSkip = 0,
Ip6OptionDiscard = 0x40,
Ip6OptionParameterProblem = 0x80,
Ip6OptionMask = 0xc0,
Ip6OptionEtherSource = 1,
Ip6OptionEtherTarget = 2,
Ip6OptionPrefixInfo = 3,
Ip6OptionRedirected = 4,
Ip6OptionMtu = 5
} IP6_OPTION_TYPE;
/**
Validate the IP6 extension header format for both the packets we received
and that we will transmit. It will compute the ICMPv6 error message fields
if the option is mal-formatted.
@param[in] IpSb The IP6 service instance. This is an optional parameter.
@param[in] Packet The data of the packet. Ignored if NULL.
@param[in] NextHeader The next header field in IPv6 basic header.
@param[in] ExtHdrs The first byte of the option.
@param[in] ExtHdrsLen The length of the whole option.
@param[in] Rcvd The option is from the packet we received if TRUE,
otherwise, the option we want to transmit.
@param[out] FormerHeader The offset of NextHeader which points to Fragment
Header when we received, of the ExtHdrs.
Ignored if we transmit.
@param[out] LastHeader The pointer of NextHeader of the last extension
header processed by IP6.
@param[out] RealExtsLen The length of extension headers processed by IP6 layer.
This is an optional parameter that may be NULL.
@param[out] UnFragmentLen The length of unfragmented length of extension headers.
This is an optional parameter that may be NULL.
@param[out] Fragmented Indicate whether the packet is fragmented.
This is an optional parameter that may be NULL.
@retval TRUE The option is properly formatted.
@retval FALSE The option is malformatted.
**/
BOOLEAN
Ip6IsExtsValid (
IN IP6_SERVICE *IpSb OPTIONAL,
IN NET_BUF *Packet OPTIONAL,
IN UINT8 *NextHeader,
IN UINT8 *ExtHdrs,
IN UINT32 ExtHdrsLen,
IN BOOLEAN Rcvd,
OUT UINT32 *FormerHeader OPTIONAL,
OUT UINT8 **LastHeader,
OUT UINT32 *RealExtsLen OPTIONAL,
OUT UINT32 *UnFragmentLen OPTIONAL,
OUT BOOLEAN *Fragmented OPTIONAL
);
/**
Generate an IPv6 router alert option in network order and output it through Buffer.
@param[out] Buffer Points to a buffer to record the generated option.
@param[in, out] BufferLen The length of Buffer, in bytes.
@param[in] NextHeader The 8-bit selector indicates the type of header
immediately following the Hop-by-Hop Options header.
@retval EFI_BUFFER_TOO_SMALL The Buffer is too small to contain the generated
option. BufferLen is updated for the required size.
@retval EFI_SUCCESS The option is generated and filled in to Buffer.
**/
EFI_STATUS
Ip6FillHopByHop (
OUT UINT8 *Buffer,
IN OUT UINTN *BufferLen,
IN UINT8 NextHeader
);
/**
Insert a Fragment Header to the Extension headers and output it in UpdatedExtHdrs.
@param[in] IpSb The IP6 service instance to transmit the packet.
@param[in] NextHeader The extension header type of first extension header.
@param[in] LastHeader The extension header type of last extension header.
@param[in] ExtHdrs The length of the original extension header.
@param[in] ExtHdrsLen The length of the extension headers.
@param[in] FragmentOffset The fragment offset of the data following the header.
@param[out] UpdatedExtHdrs The updated ExtHdrs with Fragment header inserted.
It's caller's responsibility to free this buffer.
@retval EFI_OUT_OF_RESOURCES Failed to finish the operation due to lake of
resource.
@retval EFI_UNSUPPORTED The extension header specified in ExtHdrs is not
supported currently.
@retval EFI_SUCCESS The operation performed successfully.
**/
EFI_STATUS
Ip6FillFragmentHeader (
IN IP6_SERVICE *IpSb,
IN UINT8 NextHeader,
IN UINT8 LastHeader,
IN UINT8 *ExtHdrs,
IN UINT32 ExtHdrsLen,
IN UINT16 FragmentOffset,
OUT UINT8 **UpdatedExtHdrs
);
/**
Copy the extension headers from the original to buffer. A Fragment header is
appended to the end.
@param[in] NextHeader The 8-bit selector indicates the type of
the fragment header's next header.
@param[in] ExtHdrs The length of the original extension header.
@param[in] LastHeader The pointer of next header of last extension header.
@param[in] FragmentOffset The fragment offset of the data following the header.
@param[in] UnFragmentHdrLen The length of unfragmented length of extension headers.
@param[in, out] Buf The buffer to copy options to.
@param[in, out] BufLen The length of the buffer.
@retval EFI_SUCCESS The options are copied over.
@retval EFI_BUFFER_TOO_SMALL The buffer caller provided is too small.
**/
EFI_STATUS
Ip6CopyExts (
IN UINT8 NextHeader,
IN UINT8 *ExtHdrs,
IN UINT8 *LastHeader,
IN UINT16 FragmentOffset,
IN UINT32 UnFragmentHdrLen,
IN OUT UINT8 *Buf,
IN OUT UINT32 *BufLen
);
/**
Validate the IP6 option format for both the packets we received
and that we will transmit. It supports the defined options in Neighbor
Discovery messages.
@param[in] Option The first byte of the option.
@param[in] OptionLen The length of the whole option.
@retval TRUE The option is properly formatted.
@retval FALSE The option is malformatted.
**/
BOOLEAN
Ip6IsNDOptionValid (
IN UINT8 *Option,
IN UINT16 OptionLen
);
#endif
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