Function addnode

src/rpc/net.cpp:269–325

}

static RPCHelpMan addnode()
{
    return RPCHelpMan{"addnode",
                "\nAttempts to add or remove a node from the addnode list.\n"
                "Or try a connection to a node once.\n"
                "Nodes added using addnode (or -connect) are protected from DoS disconnection and are not required to be\n"
                "full nodes/support SegWit as other outbound peers are (though such peers will not be synced from).\n" +
                strprintf("Addnode connections are limited to %u at a time", MAX_ADDNODE_CONNECTIONS) +
                " and are counted separately from the -maxconnections limit.\n",
                {
                    {"node", RPCArg::Type::STR, RPCArg::Optional::NO, "The node (see getpeerinfo for nodes)"},
                    {"command", RPCArg::Type::STR, RPCArg::Optional::NO, "'add' to add a node to the list, 'remove' to remove a node from the list, 'onetry' to try a connection to the node once"},
                },
                RPCResult{RPCResult::Type::NONE, "", ""},
                RPCExamples{
                    HelpExampleCli("addnode", "\"192.168.0.6:8333\" \"onetry\"")
            + HelpExampleRpc("addnode", "\"192.168.0.6:8333\", \"onetry\"")
                },
        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
    std::string strCommand;
    if (!request.params[1].isNull())
        strCommand = request.params[1].get_str();
    if (strCommand != "onetry" && strCommand != "add" && strCommand != "remove") {
        throw std::runtime_error(
            self.ToString());
    }

    NodeContext& node = EnsureAnyNodeContext(request.context);
    CConnman& connman = EnsureConnman(node);

    std::string strNode = request.params[0].get_str();

    if (strCommand == "onetry")
    {
        CAddress addr;
        connman.OpenNetworkConnection(addr, false, nullptr, strNode.c_str(), ConnectionType::MANUAL);
        return NullUniValue;
    }

    if (strCommand == "add")
    {
        if (!connman.AddNode(strNode)) {
            throw JSONRPCError(RPC_CLIENT_NODE_ALREADY_ADDED, "Error: Node already added");
        }
    }
    else if(strCommand == "remove")
    {
        if (!connman.RemoveAddedNode(strNode)) {
            throw JSONRPCError(RPC_CLIENT_NODE_NOT_ADDED, "Error: Node could not be removed. It has not been added previously.");
        }
    }

    return NullUniValue;
},
    };
}