Merge bitcoin/bitcoin#26145: [24.x] init: abort if i2p/cjdns are chosen via -onlynet but are unreachable

68209a7b5c0326e14508d9cf749771605bd6ffe7 rpc: make addpeeraddress work with cjdns addresses (Martin Zumsande)
a8a9ed67cc447d204304ccfd844c45fd76486c6a init: Abort if i2p/cjdns are chosen via -onlynet but unreachable (Martin Zumsande)

Pull request description:

  Identical commit from https://github.com/bitcoin/bitcoin/pull/25989

ACKs for top commit:
  fanquake:
    ACK 68209a7b5c0326e14508d9cf749771605bd6ffe7

Tree-SHA512: eec335df06b4c209cfe3473cb623828effd00c45a5dd605bb920edd265de1c789627482b005a51e89b8fc79cc4c5d26ff1fc306f2e4573897c5c7f083aa22861

1 files changed, 10 insertions, 0 deletions

diff --git a/src/init.cpp b/src/init.cpp
index ad894f7f11..25b40c6c6e 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1285,6 +1285,11 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
     }
 
     if (!args.IsArgSet("-cjdnsreachable")) {
+        if (args.IsArgSet("-onlynet") && IsReachable(NET_CJDNS)) {
+            return InitError(
+                _("Outbound connections restricted to CJDNS (-onlynet=cjdns) but "
+                  "-cjdnsreachable is not provided"));
+        }
         SetReachable(NET_CJDNS, false);
     }
     // Now IsReachable(NET_CJDNS) is true if:
@@ -1757,6 +1762,11 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
         }
         SetProxy(NET_I2P, Proxy{addr});
     } else {
+        if (args.IsArgSet("-onlynet") && IsReachable(NET_I2P)) {
+            return InitError(
+                _("Outbound connections restricted to i2p (-onlynet=i2p) but "
+                  "-i2psam is not provided"));
+        }
         SetReachable(NET_I2P, false);
     }