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+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TCP_SERVER_H
+#define GRPC_CORE_LIB_IOMGR_TCP_SERVER_H
+
+#include "src/core/lib/iomgr/closure.h"
+#include "src/core/lib/iomgr/endpoint.h"
+
+/* Forward decl of grpc_tcp_server */
+typedef struct grpc_tcp_server grpc_tcp_server;
+
+typedef struct grpc_tcp_server_acceptor {
+ /* grpc_tcp_server_cb functions share a ref on from_server that is valid
+ until the function returns. */
+ grpc_tcp_server *from_server;
+ /* Indices that may be passed to grpc_tcp_server_port_fd(). */
+ unsigned port_index;
+ unsigned fd_index;
+} grpc_tcp_server_acceptor;
+
+/* Called for newly connected TCP connections. */
+typedef void (*grpc_tcp_server_cb)(grpc_exec_ctx *exec_ctx, void *arg,
+ grpc_endpoint *ep,
+ grpc_tcp_server_acceptor *acceptor);
+
+/* Create a server, initially not bound to any ports. The caller owns one ref.
+ If shutdown_complete is not NULL, it will be used by
+ grpc_tcp_server_unref() when the ref count reaches zero. */
+grpc_tcp_server *grpc_tcp_server_create(grpc_closure *shutdown_complete);
+
+/* Start listening to bound ports */
+void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *server,
+ grpc_pollset **pollsets, size_t pollset_count,
+ grpc_tcp_server_cb on_accept_cb, void *cb_arg);
+
+/* Add a port to the server, returning the newly allocated port on success, or
+ -1 on failure.
+
+ The :: and 0.0.0.0 wildcard addresses are treated identically, accepting
+ both IPv4 and IPv6 connections, but :: is the preferred style. This usually
+ creates one socket, but possibly two on systems which support IPv6,
+ but not dualstack sockets. */
+/* TODO(ctiller): deprecate this, and make grpc_tcp_server_add_ports to handle
+ all of the multiple socket port matching logic in one place */
+int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
+ size_t addr_len);
+
+/* Number of fds at the given port_index, or 0 if port_index is out of
+ bounds. */
+unsigned grpc_tcp_server_port_fd_count(grpc_tcp_server *s, unsigned port_index);
+
+/* Returns the file descriptor of the Mth (fd_index) listening socket of the Nth
+ (port_index) call to add_port() on this server, or -1 if the indices are out
+ of bounds. The file descriptor remains owned by the server, and will be
+ cleaned up when the ref count reaches zero. */
+int grpc_tcp_server_port_fd(grpc_tcp_server *s, unsigned port_index,
+ unsigned fd_index);
+
+/* Ref s and return s. */
+grpc_tcp_server *grpc_tcp_server_ref(grpc_tcp_server *s);
+
+/* shutdown_starting is called when ref count has reached zero and the server is
+ about to be destroyed. The server will be deleted after it returns. Calling
+ grpc_tcp_server_ref() from it has no effect. */
+void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s,
+ grpc_closure *shutdown_starting);
+
+/* If the refcount drops to zero, delete s, and call (exec_ctx==NULL) or enqueue
+ a call (exec_ctx!=NULL) to shutdown_complete. */
+void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TCP_SERVER_H */