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SourceVuESP-IDF Framework and ExamplesESP-IDFot::Ip6::Option::GetSize() const

ot::Ip6::Option::GetSize() const method

Returns the size (number of bytes) of the IPv6 Option. Returns the proper size of the Option independent of its type, particularly if Option is Pad1 (which does not follow the common Option header structure and has only Type field with no Length field). For other Option types, the returned size includes the Type and Length fields.

Syntax

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Summary

Declaration

Definition

from ip6_headers.hpp:469

uint16_t GetSize(void) const;

Implemented in ip6_headers.cpp:94

Return value

The size of the Option.

References

Code

Location

Scope

Referrer

uint16_t Option::GetSize(void) const

ip6_headers.cpp:94

uint16_t GetSize(void) const;

ip6_headers.hpp:469

if (padOption.InitToPadHeaderWithSize(sizeof(HopByHopHeader) + mplOption.GetSize()) == kErrorNone)

ot::Ip6::Ip6::AddMplOption()

SuccessOrExit(error = aMessage.PrependBytes(&padOption, padOption.GetSize()));

ot::Ip6::Ip6::AddMplOption()

SuccessOrExit(error = aMessage.PrependBytes(&mplOption, mplOption.GetSize()));

ot::Ip6::Ip6::AddMplOption()

aMessage.WriteBytes(hbhSize, &mplOption, mplOption.GetSize());

ot::Ip6::Ip6::InsertMplOption()

if (padOption.InitToPadHeaderWithSize(mplOption.GetSize()) == kErrorNone)

ot::Ip6::Ip6::InsertMplOption()

aMessage.WriteBytes(hbhSize + mplOption.GetSize(), &padOption, padOption.GetSize());

ot::Ip6::Ip6::InsertMplOption()

for (; !offsetRange.IsEmpty(); offsetRange.AdvanceOffset(option.GetSize()))

ot::Ip6::Ip6::RemoveMplOption()

mplOffsetRange.ShrinkLength(option.GetSize());

ot::Ip6::Ip6::RemoveMplOption()

VerifyOrExit(option.GetSize() <= sizeof(MplOption), error = kErrorParse);

ot::Ip6::Ip6::RemoveMplOption()

aMessage.WriteBytes(mplOffsetRange.GetOffset(), &padOption, padOption.GetSize());

ot::Ip6::Ip6::RemoveMplOption()

for (; !offsetRange.IsEmpty(); offsetRange.AdvanceOffset(option.GetSize()))

ot::Ip6::Ip6::HandleOptions()

VerifyOrExit(aOffsetRange.Contains(GetSize()), error = kErrorParse);

ip6_headers.cpp:88

ot::Ip6::Option

ot::Ip6::Option::ParseFrom()

for (; !offsetRange.IsEmpty(); offsetRange.AdvanceOffset(option.GetSize()))

ot::Lowpan::Lowpan

ot::Lowpan::Lowpan::CompressExtensionHeader()

padLength = option.GetSize();

ot::Lowpan::Lowpan

ot::Lowpan::Lowpan::CompressExtensionHeader()

SuccessOrExit(aMessage.AppendBytes(&padOption, padOption.GetSize()));

ot::Lowpan::Lowpan::DecompressExtensionHeader()

aMessage.MoveOffset(padOption.GetSize());

ot::Lowpan::Lowpan::DecompressExtensionHeader()

Call Tree

ot::Ip6::Option::GetSize() const is called by 6 functions:

ot::Ip6::Option::ParseFrom()

ot::Lowpan::Lowpan::CompressExtensionHeader()

ot::Ip6::Ip6::AddMplOption()

ot::Ip6::Ip6::InsertMplOption()

ot::Ip6::Ip6::RemoveMplOption()

ot::Ip6::Ip6::HandleOptions()

ot::Ip6::Option::GetSize() const

Data Use

ot::Ip6::Option::GetSize() const reads 3 variables and writes 4 variables:

ot::Ip6::Option::kTypePad1

ot::Ip6::Option::mType

ot::Ip6::Option::mLength

ot::Ip6::Option::GetSize() const

ot::Lowpan::Lowpan::DecompressExtensionHeader()

ot::Ip6::Ip6::AddMplOption()

ot::Ip6::Ip6::InsertMplOption()

ot::Ip6::Ip6::RemoveMplOption()

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