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Ensure we never write zero bytes (#4284)

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J. Nick Koston 2023-01-15 14:24:32 -10:00 committed by GitHub
parent 351ea04517
commit ed4a7210d3
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1 changed files with 6 additions and 0 deletions
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6
esphome/components/api/api_frame_helper.cpp
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@ -616,6 +616,9 @@ APIError APINoiseFrameHelper::write_frame_(const uint8_t *data, size_t len) {
struct iovec iov[2];
iov[0].iov_base = header;
iov[0].iov_len = 3;
if (len == 0) {
return write_raw_(iov, 1);
}
iov[1].iov_base = const_cast<uint8_t *>(data);
iov[1].iov_len = len;
@ -913,6 +916,9 @@ APIError APIPlaintextFrameHelper::write_packet(uint16_t type, const uint8_t *pay
struct iovec iov[2];
iov[0].iov_base = &header[0];
iov[0].iov_len = header.size();
if (payload_len == 0) {
return write_raw_(iov, 1);
}
iov[1].iov_base = const_cast<uint8_t *>(payload);
iov[1].iov_len = payload_len;