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