Merge bitcoin/bitcoin#30062: net: add ASMap info in getrawaddrman RPC

1e54d61 test: add coverage for `mapped_as` from `getrawaddrman` (brunoerg)
8c27149 net: rpc: return peer's mapped AS in getrawaddrman (brunoerg)

Pull request description:

  This PR adds two new fields in `getrawaddrman` RPC: "mapped_as" and "source_mapped_as". These fields are used to return the ASN (Autonomous System Number) mapped to the peer and its source. With these informations we can have a better view of the bucketing logic with ASMap specially in projects like [addrman-observer](https://github.com/0xb10c/addrman-observer).

ACKs for top commit:
  fjahr:
    Code review ACK 1e54d61
  virtu:
    ACK [1e54d61](bitcoin/bitcoin@1e54d61)
  0xB10C:
    ACK 1e54d61
  glozow:
    ACK 1e54d61

Tree-SHA512: af86bcc7a2e69bebd3fa9eaa2e527e0758c44c0a958de7292514d5f99f8f01f5df3bae11400451268e0255f738ff3acccc77f48fe129937512f1e9d9963c4c5e

Author: glozow

src/rpc/net.cpp

@@ -1099,20 +1099,28 @@ static RPCHelpMan getaddrmaninfo()
     };
 }
 
-UniValue AddrmanEntryToJSON(const AddrInfo& info)
+UniValue AddrmanEntryToJSON(const AddrInfo& info, CConnman& connman)
 {
     UniValue ret(UniValue::VOBJ);
     ret.pushKV("address", info.ToStringAddr());
+    const auto mapped_as{connman.GetMappedAS(info)};
+    if (mapped_as != 0) {
+        ret.pushKV("mapped_as", mapped_as);
+    }
     ret.pushKV("port", info.GetPort());
     ret.pushKV("services", (uint64_t)info.nServices);
     ret.pushKV("time", int64_t{TicksSinceEpoch<std::chrono::seconds>(info.nTime)});
     ret.pushKV("network", GetNetworkName(info.GetNetClass()));
     ret.pushKV("source", info.source.ToStringAddr());
     ret.pushKV("source_network", GetNetworkName(info.source.GetNetClass()));
+    const auto source_mapped_as{connman.GetMappedAS(info.source)};
+    if (source_mapped_as != 0) {
+        ret.pushKV("source_mapped_as", source_mapped_as);
+    }
     return ret;
 }
 
-UniValue AddrmanTableToJSON(const std::vector<std::pair<AddrInfo, AddressPosition>>& tableInfos)
+UniValue AddrmanTableToJSON(const std::vector<std::pair<AddrInfo, AddressPosition>>& tableInfos, CConnman& connman)
 {
     UniValue table(UniValue::VOBJ);
     for (const auto& e : tableInfos) {
@@ -1123,7 +1131,7 @@ UniValue AddrmanTableToJSON(const std::vector<std::pair<AddrInfo, AddressPositio
         // Address manager tables have unique entries so there is no advantage
         // in using UniValue::pushKV, which checks if the key already exists
         // in O(N). UniValue::pushKVEnd is used instead which currently is O(1).
-        table.pushKVEnd(key.str(), AddrmanEntryToJSON(info));
+        table.pushKVEnd(key.str(), AddrmanEntryToJSON(info, connman));
     }
     return table;
 }
@@ -1139,12 +1147,14 @@ static RPCHelpMan getrawaddrman()
                 {RPCResult::Type::OBJ_DYN, "table", "buckets with addresses in the address manager table ( new, tried )", {
                     {RPCResult::Type::OBJ, "bucket/position", "the location in the address manager table (<bucket>/<position>)", {
                         {RPCResult::Type::STR, "address", "The address of the node"},
+                        {RPCResult::Type::NUM, "mapped_as", /*optional=*/true, "The ASN mapped to the IP of this peer per our current ASMap"},
                         {RPCResult::Type::NUM, "port", "The port number of the node"},
                         {RPCResult::Type::STR, "network", "The network (" + Join(GetNetworkNames(), ", ") + ") of the address"},
                         {RPCResult::Type::NUM, "services", "The services offered by the node"},
                         {RPCResult::Type::NUM_TIME, "time", "The " + UNIX_EPOCH_TIME + " when the node was last seen"},
                         {RPCResult::Type::STR, "source", "The address that relayed the address to us"},
                         {RPCResult::Type::STR, "source_network", "The network (" + Join(GetNetworkNames(), ", ") + ") of the source address"},
+                        {RPCResult::Type::NUM, "source_mapped_as", /*optional=*/true, "The ASN mapped to the IP of this peer's source per our current ASMap"}
                     }}
                 }}
             }
@@ -1155,10 +1165,12 @@ static RPCHelpMan getrawaddrman()
         },
         [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue {
             AddrMan& addrman = EnsureAnyAddrman(request.context);
+            NodeContext& node_context = EnsureAnyNodeContext(request.context);
+            CConnman& connman = EnsureConnman(node_context);
 
             UniValue ret(UniValue::VOBJ);
-            ret.pushKV("new", AddrmanTableToJSON(addrman.GetEntries(false)));
-            ret.pushKV("tried", AddrmanTableToJSON(addrman.GetEntries(true)));
+            ret.pushKV("new", AddrmanTableToJSON(addrman.GetEntries(false), connman));
+            ret.pushKV("tried", AddrmanTableToJSON(addrman.GetEntries(true), connman));
             return ret;
         },
     };

test/functional/feature_asmap.py

@@ -27,6 +27,7 @@
 import shutil
 
 from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal
 
 DEFAULT_ASMAP_FILENAME = 'ip_asn.map' # defined in src/init.cpp
 ASMAP = '../../src/test/data/asmap.raw' # path to unit test skeleton asmap
@@ -118,6 +119,14 @@ def test_asmap_health_check(self):
         msg = "ASMap Health Check: 4 clearnet peers are mapped to 3 ASNs with 0 peers being unmapped"
         with self.node.assert_debug_log(expected_msgs=[msg]):
             self.start_node(0, extra_args=['-asmap'])
+        raw_addrman = self.node.getrawaddrman()
+        asns = []
+        for _, entries in raw_addrman.items():
+            for _, entry in entries.items():
+                asn = entry['mapped_as']
+                if asn not in asns:
+                    asns.append(asn)
+        assert_equal(len(asns), 3)
         os.remove(self.default_asmap)
 
     def run_test(self):