otError Netif::AddExternalUnicastAddress(const NetifUnicastAddress &aAddress)
{
otError error = OT_ERROR_NONE;
NetifUnicastAddress *entry;
size_t num = sizeof(mExtUnicastAddresses) / sizeof(mExtUnicastAddresses[0]);
VerifyOrExit(!aAddress.GetAddress().IsLinkLocal(), error = OT_ERROR_INVALID_ARGS);
for (entry = mUnicastAddresses; entry; entry = entry->GetNext())
{
if (entry->GetAddress() == aAddress.GetAddress())
{
VerifyOrExit((entry >= &mExtUnicastAddresses[0]) && (entry < &mExtUnicastAddresses[num]),
error = OT_ERROR_INVALID_ARGS);
entry->mPrefixLength = aAddress.mPrefixLength;
entry->mPreferred = aAddress.mPreferred;
entry->mValid = aAddress.mValid;
ExitNow();
}
}
// Find an available entry in the `mExtUnicastAddresses` array.
for (entry = &mExtUnicastAddresses[0]; num > 0; num--, entry++)
{
// In an unused/available entry, `mNext` points back to the entry itself.
if (entry->mNext == entry)
{
break;
}
}
VerifyOrExit(num > 0, error = OT_ERROR_NO_BUFS);
// Copy the new address into the available entry and insert it in linked-list.
*entry = aAddress;
entry->mNext = mUnicastAddresses;
mUnicastAddresses = entry;
GetNotifier().SetFlags(OT_CHANGED_IP6_ADDRESS_ADDED);
exit:
return error;
}
void Netif::RemoveAllExternalUnicastAddresses(void)
{
size_t num = sizeof(mExtUnicastAddresses) / sizeof(mExtUnicastAddresses[0]);
for (NetifUnicastAddress *entry = &mExtUnicastAddresses[0]; num > 0; num--, entry++)
{
// In unused entries, the `mNext` points back to the entry itself.
if (entry->mNext != entry)
{
RemoveExternalUnicastAddress(entry->GetAddress());
}
}
}
int Netif::GetOnLinkNetif(const Address &aAddress)
{
int rval = -1;
for (Netif *netif = sNetifListHead; netif; netif = netif->mNext)
{
for (NetifUnicastAddress *cur = netif->mUnicastAddresses; cur; cur = cur->GetNext())
{
if (cur->GetAddress().PrefixMatch(aAddress) >= cur->mPrefixLength)
{
ExitNow(rval = netif->mInterfaceId);
}
}
}
exit:
return rval;
}
bool Netif::IsUnicastAddress(const Address &aAddress)
{
bool rval = false;
for (Netif *netif = sNetifListHead; netif; netif = netif->mNext)
{
for (NetifUnicastAddress *cur = netif->mUnicastAddresses; cur; cur = cur->GetNext())
{
if (cur->GetAddress() == aAddress)
{
ExitNow(rval = true);
}
}
}
exit:
return rval;
}
otError Netif::RemoveExternalUnicastAddress(const Address &aAddress)
{
otError error = OT_ERROR_NONE;
NetifUnicastAddress *entry;
NetifUnicastAddress *last = NULL;
size_t num = sizeof(mExtUnicastAddresses) / sizeof(mExtUnicastAddresses[0]);
for (entry = mUnicastAddresses; entry; entry = entry->GetNext())
{
if (entry->GetAddress() == aAddress)
{
VerifyOrExit((entry >= &mExtUnicastAddresses[0]) && (entry < &mExtUnicastAddresses[num]),
error = OT_ERROR_INVALID_ARGS);
if (last)
{
last->mNext = entry->mNext;
}
else
{
mUnicastAddresses = entry->GetNext();
}
break;
}
last = entry;
}
VerifyOrExit(entry != NULL, error = OT_ERROR_NOT_FOUND);
// To mark the address entry as unused/available, set the `mNext` pointer back to the entry itself.
entry->mNext = entry;
GetNotifier().SetFlags(OT_CHANGED_IP6_ADDRESS_REMOVED);
exit:
return error;
}