- irc::sockets::sockaddrs bind_to;
- irc::sockets::aptosa(addr.c_str(), port, &bind_to);
- irc::sockets::satoap(&bind_to, bind_addr, bind_port);
-
- // Preserve empty string for wildcard binds, rather than "::" or "0.0.0.0"
- if (addr.empty())
- bind_addr = addr;
-
- this->SetFd(irc::sockets::OpenTCPSocket(bind_addr.c_str()));
- if (this->GetFd() > -1)
+ irc::sockets::satoap(bind_to, bind_addr, bind_port);
+ bind_desc = bind_to.str();
+
+ fd = socket(bind_to.sa.sa_family, SOCK_STREAM, 0);
+
+ if (this->fd == -1)
+ return;
+
+#ifdef IPV6_V6ONLY
+ /* This OS supports IPv6 sockets that can also listen for IPv4
+ * connections. If our address is "*" or empty, enable both v4 and v6 to
+ * allow for simpler configuration on dual-stack hosts. Otherwise, if it
+ * is "::" or an IPv6 address, disable support so that an IPv4 bind will
+ * work on the port (by us or another application).
+ */
+ if (bind_to.sa.sa_family == AF_INET6)
+ {
+ std::string addr = tag->getString("address");
+ /* This must be >= sizeof(DWORD) on Windows */
+ const int enable = (addr.empty() || addr == "*") ? 0 : 1;
+ /* This must be before bind() */
+ setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const char *>(&enable), sizeof(enable));
+ // errors ignored intentionally
+ }
+#endif
+
+ SocketEngine::SetReuse(fd);
+ int rv = SocketEngine::Bind(this->fd, bind_to);
+ if (rv >= 0)
+ rv = SocketEngine::Listen(this->fd, ServerInstance->Config->MaxConn);
+
+ int timeout = tag->getInt("defer", 0);
+ if (timeout && !rv)
+ {
+#if defined TCP_DEFER_ACCEPT
+ setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, sizeof(timeout));
+#elif defined SO_ACCEPTFILTER
+ struct accept_filter_arg afa;
+ memset(&afa, 0, sizeof(afa));
+ strcpy(afa.af_name, "dataready");
+ setsockopt(fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));
+#endif
+ }
+
+ if (rv < 0)
+ {
+ int errstore = errno;
+ SocketEngine::Shutdown(this, 2);
+ SocketEngine::Close(this->GetFd());
+ this->fd = -1;
+ errno = errstore;
+ }
+ else