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[address-resolver] allow addr resolution using net data service (#8318)

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This commit implements a new optimization in `AddressResolver`
allowing it to resolve on-mesh IPv6 addresses using info from Thread
Network Data DNS/SRP Service (Unicast Address) entries.

When determining EID-to-RLOC mapping in `Resolve()`, we first try to
match the EID against unicast addresses discovered from DNS/SRP
service entries. This is limited to entries where the address/port
info is encoded as part of server data. If a match is found the
associated RLOC16 of the BR which added the entry in Network Data
will be used (i.e., the `server16` field from Network data server
sub-TLV). This optimization is used on devices where MLE Mode
indicates they receive full Network Data and not the stable subset
(since stable subset will not provide RLOC16 info).

This commit adds a similar check in `UpdateSnoopedCacheEntry()` so
that the limited snoop cache entries are not unnecessarily used for
addresses which can be resolved using Network Data services.
This commit is contained in:
Abtin Keshavarzian
2022-10-26 01:37:40 -07:00
committed by GitHub
parent 53305d4762
commit ed31bfefb6
7 changed files with 72 additions and 10 deletions
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tests/unit/test_network_data.cpp
+9 -8
View File
@@ -642,6 +642,7 @@ void TestNetworkDataDsnSrpServices(void)
const char * mAddress;
uint16_t mPort;
Service::DnsSrpUnicast::Origin mOrigin;
uint16_t mRloc16;
bool Matches(Service::DnsSrpUnicast::Info aInfo) const
{
@@ -650,7 +651,7 @@ void TestNetworkDataDsnSrpServices(void)
SuccessOrQuit(sockAddr.GetAddress().FromString(mAddress));
sockAddr.SetPort(mPort);
return (aInfo.mSockAddr == sockAddr) && (aInfo.mOrigin == mOrigin);
return (aInfo.mSockAddr == sockAddr) && (aInfo.mOrigin == mOrigin) && (aInfo.mRloc16 == mRloc16);
}
};
@@ -671,11 +672,11 @@ void TestNetworkDataDsnSrpServices(void)
};
const UnicastEntry kUnicastEntries[] = {
{"fdde:ad00:beef:0:2d0e:c627:5556:18d9", 0x1234, Service::DnsSrpUnicast::kFromServiceData},
{"fd00:aabb:ccdd:eeff:11:2233:4455:6677", 0xabcd, Service::DnsSrpUnicast::kFromServerData},
{"fdde:ad00:beef:0:0:ff:fe00:2800", 0x5678, Service::DnsSrpUnicast::kFromServerData},
{"fd00:1234:5678:9abc:def0:123:4567:89ab", 0x0e, Service::DnsSrpUnicast::kFromServerData},
{"fdde:ad00:beef:0:0:ff:fe00:6c00", 0xcd12, Service::DnsSrpUnicast::kFromServerData},
{"fdde:ad00:beef:0:2d0e:c627:5556:18d9", 0x1234, Service::DnsSrpUnicast::kFromServiceData, 0xfffe},
{"fd00:aabb:ccdd:eeff:11:2233:4455:6677", 0xabcd, Service::DnsSrpUnicast::kFromServerData, 0x6c00},
{"fdde:ad00:beef:0:0:ff:fe00:2800", 0x5678, Service::DnsSrpUnicast::kFromServerData, 0x2800},
{"fd00:1234:5678:9abc:def0:123:4567:89ab", 0x0e, Service::DnsSrpUnicast::kFromServerData, 0x4c00},
{"fdde:ad00:beef:0:0:ff:fe00:6c00", 0xcd12, Service::DnsSrpUnicast::kFromServerData, 0x6c00},
};
const uint8_t kPreferredAnycastEntryIndex = 2;
@@ -725,8 +726,8 @@ void TestNetworkDataDsnSrpServices(void)
for (const UnicastEntry &entry : kUnicastEntries)
{
SuccessOrQuit(manager.GetNextDnsSrpUnicastInfo(iterator, unicastInfo));
printf("\nunicastInfo { %s, origin:%s }", unicastInfo.mSockAddr.ToString().AsCString(),
kOriginStrings[unicastInfo.mOrigin]);
printf("\nunicastInfo { %s, origin:%s, rloc16:%04x }", unicastInfo.mSockAddr.ToString().AsCString(),
kOriginStrings[unicastInfo.mOrigin], unicastInfo.mRloc16);
VerifyOrQuit(entry.Matches(unicastInfo), "GetNextDnsSrpUnicastInfo() returned incorrect info");
}