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API: copy the data to send into the tcp internal buffer (#1455)
Without the flag lwip only holds a reference to the supplied buffers and the reference must be valid until the tcp ack is received. This can't be guaranteed for stack allocated buffers
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1 changed files with 4 additions and 2 deletions
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@ -676,8 +676,10 @@ bool APIConnection::send_buffer(ProtoWriteBuffer buffer, uint32_t message_type)
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}
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}
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this->client_->add(reinterpret_cast<char *>(header.data()), header.size());
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this->client_->add(reinterpret_cast<char *>(buffer.get_buffer()->data()), buffer.get_buffer()->size());
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this->client_->add(reinterpret_cast<char *>(header.data()), header.size(),
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ASYNC_WRITE_FLAG_COPY | ASYNC_WRITE_FLAG_MORE);
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this->client_->add(reinterpret_cast<char *>(buffer.get_buffer()->data()), buffer.get_buffer()->size(),
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ASYNC_WRITE_FLAG_COPY);
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bool ret = this->client_->send();
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return ret;
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}
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