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[network-data] add prefix length checks (#3498)

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This commit is contained in:
Jonathan Hui
2019-01-23 21:49:37 -08:00
committed by GitHub
parent 4bc819c307
commit a00c538830
1 changed files with 7 additions and 2 deletions
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src/core/thread/network_data_local.cpp
+7 -2
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@@ -59,6 +59,8 @@ otError Local::AddOnMeshPrefix(const uint8_t *aPrefix, uint8_t aPrefixLength, in
PrefixTlv * prefixTlv;
BorderRouterTlv *brTlv;
VerifyOrExit(prefixLengthBytes <= sizeof(Ip6::Address), error = OT_ERROR_INVALID_ARGS);
VerifyOrExit(Ip6::Address::PrefixMatch(aPrefix, GetNetif().GetMle().GetMeshLocalPrefix().m8, prefixLengthBytes) <
Ip6::Address::kMeshLocalPrefixLength,
error = OT_ERROR_INVALID_ARGS);
@@ -111,14 +113,17 @@ exit:
otError Local::AddHasRoutePrefix(const uint8_t *aPrefix, uint8_t aPrefixLength, int8_t aPrf, bool aStable)
{
otError error = OT_ERROR_NONE;
otError error = OT_ERROR_NONE;
uint8_t prefixLengthBytes = BitVectorBytes(aPrefixLength);
PrefixTlv * prefixTlv;
HasRouteTlv *hasRouteTlv;
uint8_t appendLength;
VerifyOrExit(prefixLengthBytes <= sizeof(Ip6::Address), error = OT_ERROR_INVALID_ARGS);
RemoveHasRoutePrefix(aPrefix, aPrefixLength);
appendLength = sizeof(PrefixTlv) + BitVectorBytes(aPrefixLength) + sizeof(HasRouteTlv) + sizeof(HasRouteEntry);
appendLength = sizeof(PrefixTlv) + prefixLengthBytes + sizeof(HasRouteTlv) + sizeof(HasRouteEntry);
VerifyOrExit(mLength + appendLength <= sizeof(mTlvs), error = OT_ERROR_NO_BUFS);
prefixTlv = reinterpret_cast<PrefixTlv *>(mTlvs + mLength);