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Summary Syntax Arguments References Call Tree Data Use

SourceVuESP-IDF Framework and ExamplesESP-IDFot::Message::PrependBytes()

ot::Message::PrependBytes() method

Prepends bytes to the front of the message. On success, this method grows the message by @p aLength bytes.

Syntax

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Summary

Declaration

Definition

from message.hpp:656

Error PrependBytes(const void *aBuf, uint16_t aLength);

Implemented in message.cpp:417

Arguments

Argument

Description

aBuf

A pointer to a data buffer (can be `nullptr` to grow message without writing bytes).

aLength

The number of bytes to prepend.

Return value

kErrorNone Successfully prepended the bytes. kErrorNoBufs Not enough reserved bytes in the message.

References

Code

Location

Scope

Referrer

Error Message::PrependBytes(const void *aBuf, uint16_t aLength)

message.cpp:417

Error PrependBytes(const void *aBuf, uint16_t aLength);

message.hpp:656

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

ip6.cpp:176

ot::Ip6::Ip6

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

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

ip6.cpp:179

ot::Ip6::Ip6

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

SuccessOrExit(error = PrependBytes(nullptr, aLength));

message.cpp:523

ot::Message

ot::Message::InsertHeader()

Call Tree

ot::Message::PrependBytes() is called by 2 functions and calls 9 functions:

ot::Message::InsertHeader()

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

ot::Message::PrependBytes()

ot::Buffer::SetNextBuffer()

ot::Message::GetOffset() const

ot::Message::GetPriority() const

ot::Message::GetReserved() const

ot::Message::SetReserved()

ot::Message::GetMessagePool() const

ot::Message::SetOffset()

ot::Message::WriteBytes()

ot::MessagePool::NewBuffer()

Data Use

ot::Message::PrependBytes() reads 4 variables:

ot::Buffer::SetNextBuffer()

ot::Buffer::kBufferDataSize

ot::kErrorNone

ot::kErrorNoBufs

ot::Message::PrependBytes()

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