Function HTTPBindAddresses

src/httpserver.cpp:298–337

Bind HTTP server to specified addresses */

/** Bind HTTP server to specified addresses */
static bool HTTPBindAddresses(struct evhttp* http)
{
    uint16_t http_port{static_cast<uint16_t>(gArgs.GetIntArg("-rpcport", BaseParams().RPCPort()))};
    std::vector<std::pair<std::string, uint16_t>> endpoints;

    // Determine what addresses to bind to
    if (!(gArgs.IsArgSet("-rpcallowip") && gArgs.IsArgSet("-rpcbind"))) { // Default to loopback if not allowing external IPs
        endpoints.push_back(std::make_pair("::1", http_port));
        endpoints.push_back(std::make_pair("127.0.0.1", http_port));
        if (gArgs.IsArgSet("-rpcallowip")) {
            LogPrintf("WARNING: option -rpcallowip was specified without -rpcbind; this doesn't usually make sense\n");
        }
        if (gArgs.IsArgSet("-rpcbind")) {
            LogPrintf("WARNING: option -rpcbind was ignored because -rpcallowip was not specified, refusing to allow everyone to connect\n");
        }
    } else if (gArgs.IsArgSet("-rpcbind")) { // Specific bind address
        for (const std::string& strRPCBind : gArgs.GetArgs("-rpcbind")) {
            uint16_t port{http_port};
            std::string host;
            SplitHostPort(strRPCBind, port, host);
            endpoints.push_back(std::make_pair(host, port));
        }
    }

    // Bind addresses
    for (std::vector<std::pair<std::string, uint16_t> >::iterator i = endpoints.begin(); i != endpoints.end(); ++i) {
        LogPrint(BCLog::HTTP, "Binding RPC on address %s port %i\n", i->first, i->second);
        evhttp_bound_socket *bind_handle = evhttp_bind_socket_with_handle(http, i->first.empty() ? nullptr : i->first.c_str(), i->second);
        if (bind_handle) {
            CNetAddr addr;
            if (i->first.empty() || (LookupHost(i->first, addr, false) && addr.IsBindAny())) {
                LogPrintf("WARNING: the RPC server is not safe to expose to untrusted networks such as the public internet\n");
            }
            boundSockets.push_back(bind_handle);
        } else {
            LogPrintf("Binding RPC on address %s port %i failed.\n", i->first, i->second);
        }
    }
    return !boundSockets.empty();
}

/** Simple wrapper to set thread name and run work queue */
static void HTTPWorkQueueRun(WorkQueue<HTTPClosure>* queue, int worker_num)