Merge #20120: net, rpc, test, bugfix: update GetNetworkName, GetNetworksInfo, regression tests

7b5bd3102e test: add getnetworkinfo network name regression tests (Jon Atack)
9a75e1e569 rpc: update GetNetworksInfo() to not return unsupported networks (Jon Atack)
ba8997fb2e net: update GetNetworkName() with all enum Network cases (Jon Atack)

Pull request description:

  Following up on the BIP155 addrv2 changes, and starting with 7be6ff6 in #19845, RPC getnetworkinfo began returning networks with empty names.

  <details><summary><code>getnetworkinfo</code> on current master</summary><p>

  ```
    "networks": [
      {
        "name": "ipv4",
        "limited": false,
        "reachable": true,
        "proxy": "",
        "proxy_randomize_credentials": false
      },
      {
        "name": "ipv6",
        "limited": false,
        "reachable": true,
        "proxy": "",
        "proxy_randomize_credentials": false
      },
      {
        "name": "onion",
        "limited": false,
        "reachable": true,
        "proxy": "127.0.0.1:9050",
        "proxy_randomize_credentials": true
      },
      {
        "name": "",
        "limited": false,
        "reachable": true,
        "proxy": "",
        "proxy_randomize_credentials": false
      },
      {
        "name": "",
        "limited": false,
        "reachable": true,
        "proxy": "",
        "proxy_randomize_credentials": false
      }
    ],
  ```
  </p></details>

  <details><summary><code>getnetworkinfo</code> on this branch</summary><p>

  ```
    "networks": [
      {
        "name": "ipv4",
        "limited": false,
        "reachable": true,
        "proxy": "",
        "proxy_randomize_credentials": false
      },
      {
        "name": "ipv6",
        "limited": false,
        "reachable": true,
        "proxy": "",
        "proxy_randomize_credentials": false
      },
      {
        "name": "onion",
        "limited": false,
        "reachable": true,
        "proxy": "127.0.0.1:9050",
        "proxy_randomize_credentials": true
      }
    ],
  ```
  </p></details>

  This patch:
  - updates `GetNetworkName()` to the current Network enum
  - updates `getNetworksInfo()` to ignore as-yet unsupported networks
  - adds regression tests

ACKs for top commit:
  hebasto:
    re-ACK 7b5bd3102e
  vasild:
    ACK 7b5bd3102

Tree-SHA512: 8f12363eb430e6f45e59e3b1d69c2f2eb5ead254ce7a67547d116c3b70138d763157335a3c85b51f684a3b3b502c6aace4f6fa60ac3b988cf7a9475a7423c4d7

src/netbase.cpp

@@ -52,14 +52,20 @@ enum Network ParseNetwork(const std::string& net_in) {
     return NET_UNROUTABLE;
 }
 
-std::string GetNetworkName(enum Network net) {
-    switch(net)
+std::string GetNetworkName(enum Network net)
 {
+    switch (net) {
+    case NET_UNROUTABLE: return "unroutable";
     case NET_IPV4: return "ipv4";
     case NET_IPV6: return "ipv6";
     case NET_ONION: return "onion";
-    default: return "";
-    }
+    case NET_I2P: return "i2p";
+    case NET_CJDNS: return "cjdns";
+    case NET_INTERNAL: return "internal";
+    case NET_MAX: assert(false);
+    } // no default case, so the compiler can warn about missing cases
+
+    assert(false);
 }
 
 bool static LookupIntern(const std::string& name, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)

src/rpc/net.cpp

@@ -497,11 +497,9 @@ static RPCHelpMan getnettotals()
 static UniValue GetNetworksInfo()
 {
     UniValue networks(UniValue::VARR);
-    for(int n=0; n<NET_MAX; ++n)
-    {
+    for (int n = 0; n < NET_MAX; ++n) {
         enum Network network = static_cast<enum Network>(n);
-        if(network == NET_UNROUTABLE || network == NET_INTERNAL)
-            continue;
+        if (network == NET_UNROUTABLE || network == NET_I2P || network == NET_CJDNS || network == NET_INTERNAL) continue;
         proxyType proxy;
         UniValue obj(UniValue::VOBJ);
         GetProxy(network, proxy);

test/functional/feature_proxy.py

@@ -26,6 +26,8 @@ addnode connect to IPv4
 addnode connect to IPv6
 addnode connect to onion
 addnode connect to generic DNS name
+
+- Test getnetworkinfo for each node
 """
 
 import socket
@@ -41,12 +43,16 @@ from test_framework.util import (
 from test_framework.netutil import test_ipv6_local
 
 RANGE_BEGIN = PORT_MIN + 2 * PORT_RANGE  # Start after p2p and rpc ports
-# From GetNetworkName() in netbase.cpp:
-NET_UNROUTABLE = ""
+
+# Networks returned by RPC getpeerinfo, defined in src/netbase.cpp::GetNetworkName()
+NET_UNROUTABLE = "unroutable"
 NET_IPV4 = "ipv4"
 NET_IPV6 = "ipv6"
 NET_ONION = "onion"
 
+# Networks returned by RPC getnetworkinfo, defined in src/rpc/net.cpp::GetNetworksInfo()
+NETWORKS = frozenset({NET_IPV4, NET_IPV6, NET_ONION})
+
 
 class ProxyTest(BitcoinTestFramework):
     def set_test_params(self):
@@ -84,8 +90,8 @@ class ProxyTest(BitcoinTestFramework):
             self.serv3 = Socks5Server(self.conf3)
             self.serv3.start()
 
-        # Note: proxies are not used to connect to local nodes
-        # this is because the proxy to use is based on CService.GetNetwork(), which return NET_UNROUTABLE for localhost
+        # Note: proxies are not used to connect to local nodes. This is because the proxy to
+        # use is based on CService.GetNetwork(), which returns NET_UNROUTABLE for localhost.
         args = [
             ['-listen', '-proxy=%s:%i' % (self.conf1.addr),'-proxyrandomize=1'],
             ['-listen', '-proxy=%s:%i' % (self.conf1.addr),'-onion=%s:%i' % (self.conf2.addr),'-proxyrandomize=0'],
@@ -189,14 +195,16 @@ class ProxyTest(BitcoinTestFramework):
                 r[x['name']] = x
             return r
 
-        # test RPC getnetworkinfo
+        self.log.info("Test RPC getnetworkinfo")
         n0 = networks_dict(self.nodes[0].getnetworkinfo())
-        for net in ['ipv4','ipv6','onion']:
+        assert_equal(NETWORKS, n0.keys())
+        for net in NETWORKS:
             assert_equal(n0[net]['proxy'], '%s:%i' % (self.conf1.addr))
             assert_equal(n0[net]['proxy_randomize_credentials'], True)
         assert_equal(n0['onion']['reachable'], True)
 
         n1 = networks_dict(self.nodes[1].getnetworkinfo())
+        assert_equal(NETWORKS, n1.keys())
         for net in ['ipv4', 'ipv6']:
             assert_equal(n1[net]['proxy'], '%s:%i' % (self.conf1.addr))
             assert_equal(n1[net]['proxy_randomize_credentials'], False)
@@ -205,14 +213,16 @@ class ProxyTest(BitcoinTestFramework):
         assert_equal(n1['onion']['reachable'], True)
 
         n2 = networks_dict(self.nodes[2].getnetworkinfo())
-        for net in ['ipv4','ipv6','onion']:
+        assert_equal(NETWORKS, n2.keys())
+        for net in NETWORKS:
             assert_equal(n2[net]['proxy'], '%s:%i' % (self.conf2.addr))
             assert_equal(n2[net]['proxy_randomize_credentials'], True)
         assert_equal(n2['onion']['reachable'], True)
 
         if self.have_ipv6:
             n3 = networks_dict(self.nodes[3].getnetworkinfo())
-            for net in ['ipv4','ipv6']:
+            assert_equal(NETWORKS, n3.keys())
+            for net in NETWORKS:
                 assert_equal(n3[net]['proxy'], '[%s]:%i' % (self.conf3.addr))
                 assert_equal(n3[net]['proxy_randomize_credentials'], False)
             assert_equal(n3['onion']['reachable'], False)