Initial checkin of gRPC to third_party/

third_party/grpc/src/core/surface/server_chttp2.c

+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/grpc.h>
+
+#include "src/core/channel/http_server_filter.h"
+#include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/tcp_server.h"
+#include "src/core/surface/api_trace.h"
+#include "src/core/surface/server.h"
+#include "src/core/transport/chttp2_transport.h"
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+static void setup_transport(grpc_exec_ctx *exec_ctx, void *server,
+                            grpc_transport *transport) {
+  static grpc_channel_filter const *extra_filters[] = {
+      &grpc_http_server_filter};
+  grpc_server_setup_transport(exec_ctx, server, transport, extra_filters,
+                              GPR_ARRAY_SIZE(extra_filters),
+                              grpc_server_get_channel_args(server));
+}
+
+static void new_transport(grpc_exec_ctx *exec_ctx, void *server,
+                          grpc_endpoint *tcp,
+                          grpc_tcp_server_acceptor *acceptor) {
+  /*
+   * Beware that the call to grpc_create_chttp2_transport() has to happen before
+   * grpc_tcp_server_destroy(). This is fine here, but similar code
+   * asynchronously doing a handshake instead of calling grpc_tcp_server_start()
+   * (as in server_secure_chttp2.c) needs to add synchronization to avoid this
+   * case.
+   */
+  grpc_transport *transport = grpc_create_chttp2_transport(
+      exec_ctx, grpc_server_get_channel_args(server), tcp, 0);
+  setup_transport(exec_ctx, server, transport);
+  grpc_chttp2_transport_start_reading(exec_ctx, transport, NULL, 0);
+}
+
+/* Server callback: start listening on our ports */
+static void start(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
+                  grpc_pollset **pollsets, size_t pollset_count) {
+  grpc_tcp_server *tcp = tcpp;
+  grpc_tcp_server_start(exec_ctx, tcp, pollsets, pollset_count, new_transport,
+                        server);
+}
+
+/* Server callback: destroy the tcp listener (so we don't generate further
+   callbacks) */
+static void destroy(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
+                    grpc_closure *destroy_done) {
+  grpc_tcp_server *tcp = tcpp;
+  grpc_tcp_server_unref(exec_ctx, tcp);
+  grpc_exec_ctx_enqueue(exec_ctx, destroy_done, true, NULL);
+}
+
+int grpc_server_add_insecure_http2_port(grpc_server *server, const char *addr) {
+  grpc_resolved_addresses *resolved = NULL;
+  grpc_tcp_server *tcp = NULL;
+  size_t i;
+  unsigned count = 0;
+  int port_num = -1;
+  int port_temp;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+  GRPC_API_TRACE("grpc_server_add_insecure_http2_port(server=%p, addr=%s)", 2,
+                 (server, addr));
+
+  resolved = grpc_blocking_resolve_address(addr, "http");
+  if (!resolved) {
+    goto error;
+  }
+
+  tcp = grpc_tcp_server_create(NULL);
+  GPR_ASSERT(tcp);
+
+  for (i = 0; i < resolved->naddrs; i++) {
+    port_temp = grpc_tcp_server_add_port(
+        tcp, (struct sockaddr *)&resolved->addrs[i].addr,
+        resolved->addrs[i].len);
+    if (port_temp > 0) {
+      if (port_num == -1) {
+        port_num = port_temp;
+      } else {
+        GPR_ASSERT(port_num == port_temp);
+      }
+      count++;
+    }
+  }
+  if (count == 0) {
+    gpr_log(GPR_ERROR, "No address added out of total %d resolved",
+            resolved->naddrs);
+    goto error;
+  }
+  if (count != resolved->naddrs) {
+    gpr_log(GPR_ERROR, "Only %d addresses added out of total %d resolved",
+            count, resolved->naddrs);
+  }
+  grpc_resolved_addresses_destroy(resolved);
+
+  /* Register with the server only upon success */
+  grpc_server_add_listener(&exec_ctx, server, tcp, start, destroy);
+  goto done;
+
+/* Error path: cleanup and return */
+error:
+  if (resolved) {
+    grpc_resolved_addresses_destroy(resolved);
+  }
+  if (tcp) {
+    grpc_tcp_server_unref(&exec_ctx, tcp);
+  }
+  port_num = 0;
+
+done:
+  grpc_exec_ctx_finish(&exec_ctx);
+  return port_num;
+}