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[mac-frame] fix problems to generate enh ack (#4990)

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- Existing code assumes security is always enabled in enhanced ack,
  however that's not always the case. So add security part only when
  it's required.

- FindHeaderIeIndex would return kInvalidIndex when IE is not
  present. It's possible that no IE is in an enh ack, so use
  SkipSecurityHeaderIndex instead.
This commit is contained in:
Li Cao
2020-05-20 22:43:59 -07:00
committed by GitHub
parent c2126a392f
commit 903ea67505
2 changed files with 16 additions and 10 deletions
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tests/unit/test_mac_frame.cpp
+3 -1
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@@ -574,7 +574,7 @@ void TestMacFrameAckGeneration(void)
uint8_t ie_data[6] = {0x04, 0x0d, 0x21, 0x0c, 0x35, 0x0c};
Mac::CslIe *csl;
ackFrame.GenerateEnhAck(receivedFrame, false, ie_data, sizeof(ie_data));
IgnoreError(ackFrame.GenerateEnhAck(receivedFrame, false, ie_data, sizeof(ie_data)));
csl = reinterpret_cast<Mac::CslIe *>(ackFrame.GetHeaderIe(Mac::Frame::kHeaderIeCsl) + sizeof(Mac::HeaderIe));
VerifyOrQuit(ackFrame.mLength == 23,
"Mac::Frame::GenerateEnhAck() failed, length incorrect\n"); // 23 is the length of the correct ack
@@ -595,9 +595,11 @@ void TestMacFrameAckGeneration(void)
VerifyOrQuit(csl->GetPeriod() == 3125 && csl->GetPhase() == 3105,
"Mac::Frame::GenerateEnhAck failed, CslIe incorrect\n");
#if OPENTHREAD_CONFIG_MAC_CSL_RECEIVER_ENABLE
ackFrame.SetCslIe(123, 456);
csl = reinterpret_cast<Mac::CslIe *>(ackFrame.GetHeaderIe(Mac::Frame::kHeaderIeCsl) + sizeof(Mac::HeaderIe));
VerifyOrQuit(csl->GetPeriod() == 123 && csl->GetPhase() == 456, "Mac::Frame::SetCslIe failed, CslIe incorrect\n");
#endif
#endif // (OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2)
}