diff options
Diffstat (limited to 'src/core/lib/iomgr/tcp_server_uv.cc')
-rw-r--r-- | src/core/lib/iomgr/tcp_server_uv.cc | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/tcp_server_uv.cc b/src/core/lib/iomgr/tcp_server_uv.cc new file mode 100644 index 0000000000..348838c495 --- /dev/null +++ b/src/core/lib/iomgr/tcp_server_uv.cc @@ -0,0 +1,456 @@ +/* + * + * Copyright 2015 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +#include "src/core/lib/iomgr/port.h" + +#ifdef GRPC_UV + +#include <assert.h> +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> + +#include "src/core/lib/iomgr/error.h" +#include "src/core/lib/iomgr/exec_ctx.h" +#include "src/core/lib/iomgr/iomgr_uv.h" +#include "src/core/lib/iomgr/sockaddr.h" +#include "src/core/lib/iomgr/sockaddr_utils.h" +#include "src/core/lib/iomgr/tcp_server.h" +#include "src/core/lib/iomgr/tcp_uv.h" + +/* one listening port */ +typedef struct grpc_tcp_listener grpc_tcp_listener; +struct grpc_tcp_listener { + uv_tcp_t *handle; + grpc_tcp_server *server; + unsigned port_index; + int port; + /* linked list */ + struct grpc_tcp_listener *next; + + bool closed; + + bool has_pending_connection; +}; + +struct grpc_tcp_server { + gpr_refcount refs; + + /* Called whenever accept() succeeds on a server port. */ + grpc_tcp_server_cb on_accept_cb; + void *on_accept_cb_arg; + + int open_ports; + + /* linked list of server ports */ + grpc_tcp_listener *head; + grpc_tcp_listener *tail; + + /* List of closures passed to shutdown_starting_add(). */ + grpc_closure_list shutdown_starting; + + /* shutdown callback */ + grpc_closure *shutdown_complete; + + bool shutdown; + + grpc_resource_quota *resource_quota; +}; + +grpc_error *grpc_tcp_server_create(grpc_exec_ctx *exec_ctx, + grpc_closure *shutdown_complete, + const grpc_channel_args *args, + grpc_tcp_server **server) { + grpc_tcp_server *s = (grpc_tcp_server *)gpr_malloc(sizeof(grpc_tcp_server)); + s->resource_quota = grpc_resource_quota_create(NULL); + for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) { + if (0 == strcmp(GRPC_ARG_RESOURCE_QUOTA, args->args[i].key)) { + if (args->args[i].type == GRPC_ARG_POINTER) { + grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota); + s->resource_quota = grpc_resource_quota_ref_internal( + (grpc_resource_quota *)args->args[i].value.pointer.p); + } else { + grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota); + gpr_free(s); + return GRPC_ERROR_CREATE_FROM_STATIC_STRING( + GRPC_ARG_RESOURCE_QUOTA " must be a pointer to a buffer pool"); + } + } + } + gpr_ref_init(&s->refs, 1); + s->on_accept_cb = NULL; + s->on_accept_cb_arg = NULL; + s->open_ports = 0; + s->head = NULL; + s->tail = NULL; + s->shutdown_starting.head = NULL; + s->shutdown_starting.tail = NULL; + s->shutdown_complete = shutdown_complete; + s->shutdown = false; + *server = s; + return GRPC_ERROR_NONE; +} + +grpc_tcp_server *grpc_tcp_server_ref(grpc_tcp_server *s) { + GRPC_UV_ASSERT_SAME_THREAD(); + gpr_ref(&s->refs); + return s; +} + +void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s, + grpc_closure *shutdown_starting) { + grpc_closure_list_append(&s->shutdown_starting, shutdown_starting, + GRPC_ERROR_NONE); +} + +static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) { + GPR_ASSERT(s->shutdown); + if (s->shutdown_complete != NULL) { + GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE); + } + + while (s->head) { + grpc_tcp_listener *sp = s->head; + s->head = sp->next; + sp->next = NULL; + gpr_free(sp->handle); + gpr_free(sp); + } + grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota); + gpr_free(s); +} + +static void handle_close_callback(uv_handle_t *handle) { + grpc_tcp_listener *sp = (grpc_tcp_listener *)handle->data; + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + sp->server->open_ports--; + if (sp->server->open_ports == 0 && sp->server->shutdown) { + finish_shutdown(&exec_ctx, sp->server); + } + grpc_exec_ctx_finish(&exec_ctx); +} + +static void close_listener(grpc_tcp_listener *sp) { + if (!sp->closed) { + sp->closed = true; + uv_close((uv_handle_t *)sp->handle, handle_close_callback); + } +} + +static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) { + int immediately_done = 0; + grpc_tcp_listener *sp; + + GPR_ASSERT(!s->shutdown); + s->shutdown = true; + + if (s->open_ports == 0) { + immediately_done = 1; + } + for (sp = s->head; sp; sp = sp->next) { + close_listener(sp); + } + + if (immediately_done) { + finish_shutdown(exec_ctx, s); + } +} + +void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) { + GRPC_UV_ASSERT_SAME_THREAD(); + if (gpr_unref(&s->refs)) { + /* Complete shutdown_starting work before destroying. */ + grpc_exec_ctx local_exec_ctx = GRPC_EXEC_CTX_INIT; + GRPC_CLOSURE_LIST_SCHED(&local_exec_ctx, &s->shutdown_starting); + if (exec_ctx == NULL) { + grpc_exec_ctx_flush(&local_exec_ctx); + tcp_server_destroy(&local_exec_ctx, s); + grpc_exec_ctx_finish(&local_exec_ctx); + } else { + grpc_exec_ctx_finish(&local_exec_ctx); + tcp_server_destroy(exec_ctx, s); + } + } +} + +static void finish_accept(grpc_exec_ctx *exec_ctx, grpc_tcp_listener *sp) { + grpc_tcp_server_acceptor *acceptor = + (grpc_tcp_server_acceptor *)gpr_malloc(sizeof(*acceptor)); + uv_tcp_t *client = NULL; + grpc_endpoint *ep = NULL; + grpc_resolved_address peer_name; + char *peer_name_string; + int err; + uv_tcp_t *server = sp->handle; + + client = (uv_tcp_t *)gpr_malloc(sizeof(uv_tcp_t)); + uv_tcp_init(uv_default_loop(), client); + // UV documentation says this is guaranteed to succeed + uv_accept((uv_stream_t *)server, (uv_stream_t *)client); + peer_name_string = NULL; + memset(&peer_name, 0, sizeof(grpc_resolved_address)); + peer_name.len = sizeof(struct sockaddr_storage); + err = uv_tcp_getpeername(client, (struct sockaddr *)&peer_name.addr, + (int *)&peer_name.len); + if (err == 0) { + peer_name_string = grpc_sockaddr_to_uri(&peer_name); + } else { + gpr_log(GPR_INFO, "uv_tcp_getpeername error: %s", uv_strerror(err)); + } + if (GRPC_TRACER_ON(grpc_tcp_trace)) { + if (peer_name_string) { + gpr_log(GPR_DEBUG, "SERVER_CONNECT: %p accepted connection: %s", + sp->server, peer_name_string); + } else { + gpr_log(GPR_DEBUG, "SERVER_CONNECT: %p accepted connection", sp->server); + } + } + ep = grpc_tcp_create(client, sp->server->resource_quota, peer_name_string); + acceptor->from_server = sp->server; + acceptor->port_index = sp->port_index; + acceptor->fd_index = 0; + sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep, NULL, + acceptor); + gpr_free(peer_name_string); +} + +static void on_connect(uv_stream_t *server, int status) { + grpc_tcp_listener *sp = (grpc_tcp_listener *)server->data; + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + + if (status < 0) { + switch (status) { + case UV_EINTR: + case UV_EAGAIN: + return; + default: + close_listener(sp); + return; + } + } + + GPR_ASSERT(!sp->has_pending_connection); + + if (GRPC_TRACER_ON(grpc_tcp_trace)) { + gpr_log(GPR_DEBUG, "SERVER_CONNECT: %p incoming connection", sp->server); + } + + // Create acceptor. + if (sp->server->on_accept_cb) { + finish_accept(&exec_ctx, sp); + } else { + sp->has_pending_connection = true; + } + grpc_exec_ctx_finish(&exec_ctx); +} + +static grpc_error *add_socket_to_server(grpc_tcp_server *s, uv_tcp_t *handle, + const grpc_resolved_address *addr, + unsigned port_index, + grpc_tcp_listener **listener) { + grpc_tcp_listener *sp = NULL; + int port = -1; + int status; + grpc_error *error; + grpc_resolved_address sockname_temp; + + // The last argument to uv_tcp_bind is flags + status = uv_tcp_bind(handle, (struct sockaddr *)addr->addr, 0); + if (status != 0) { + error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Failed to bind to port"); + error = + grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR, + grpc_slice_from_static_string(uv_strerror(status))); + return error; + } + + status = uv_listen((uv_stream_t *)handle, SOMAXCONN, on_connect); + if (status != 0) { + error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Failed to listen to port"); + error = + grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR, + grpc_slice_from_static_string(uv_strerror(status))); + return error; + } + + sockname_temp.len = (int)sizeof(struct sockaddr_storage); + status = uv_tcp_getsockname(handle, (struct sockaddr *)&sockname_temp.addr, + (int *)&sockname_temp.len); + if (status != 0) { + error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("getsockname failed"); + error = + grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR, + grpc_slice_from_static_string(uv_strerror(status))); + return error; + } + + port = grpc_sockaddr_get_port(&sockname_temp); + + GPR_ASSERT(port >= 0); + GPR_ASSERT(!s->on_accept_cb && "must add ports before starting server"); + sp = (grpc_tcp_listener *)gpr_zalloc(sizeof(grpc_tcp_listener)); + sp->next = NULL; + if (s->head == NULL) { + s->head = sp; + } else { + s->tail->next = sp; + } + s->tail = sp; + sp->server = s; + sp->handle = handle; + sp->port = port; + sp->port_index = port_index; + sp->closed = false; + handle->data = sp; + s->open_ports++; + GPR_ASSERT(sp->handle); + *listener = sp; + + return GRPC_ERROR_NONE; +} + +grpc_error *grpc_tcp_server_add_port(grpc_tcp_server *s, + const grpc_resolved_address *addr, + int *port) { + // This function is mostly copied from tcp_server_windows.c + grpc_tcp_listener *sp = NULL; + uv_tcp_t *handle; + grpc_resolved_address addr6_v4mapped; + grpc_resolved_address wildcard; + grpc_resolved_address *allocated_addr = NULL; + grpc_resolved_address sockname_temp; + unsigned port_index = 0; + int status; + grpc_error *error = GRPC_ERROR_NONE; + int family; + + GRPC_UV_ASSERT_SAME_THREAD(); + + if (s->tail != NULL) { + port_index = s->tail->port_index + 1; + } + + /* Check if this is a wildcard port, and if so, try to keep the port the same + as some previously created listener. */ + if (grpc_sockaddr_get_port(addr) == 0) { + for (sp = s->head; sp; sp = sp->next) { + sockname_temp.len = sizeof(struct sockaddr_storage); + if (0 == uv_tcp_getsockname(sp->handle, + (struct sockaddr *)&sockname_temp.addr, + (int *)&sockname_temp.len)) { + *port = grpc_sockaddr_get_port(&sockname_temp); + if (*port > 0) { + allocated_addr = (grpc_resolved_address *)gpr_malloc( + sizeof(grpc_resolved_address)); + memcpy(allocated_addr, addr, sizeof(grpc_resolved_address)); + grpc_sockaddr_set_port(allocated_addr, *port); + addr = allocated_addr; + break; + } + } + } + } + + if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) { + addr = &addr6_v4mapped; + } + + /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */ + if (grpc_sockaddr_is_wildcard(addr, port)) { + grpc_sockaddr_make_wildcard6(*port, &wildcard); + + addr = &wildcard; + } + + handle = (uv_tcp_t *)gpr_malloc(sizeof(uv_tcp_t)); + + family = grpc_sockaddr_get_family(addr); + status = uv_tcp_init_ex(uv_default_loop(), handle, (unsigned int)family); +#if defined(GPR_LINUX) && defined(SO_REUSEPORT) + if (family == AF_INET || family == AF_INET6) { + int fd; + uv_fileno((uv_handle_t *)handle, &fd); + int enable = 1; + setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &enable, sizeof(enable)); + } +#endif /* GPR_LINUX && SO_REUSEPORT */ + + if (status == 0) { + error = add_socket_to_server(s, handle, addr, port_index, &sp); + } else { + error = GRPC_ERROR_CREATE_FROM_STATIC_STRING( + "Failed to initialize UV tcp handle"); + error = + grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR, + grpc_slice_from_static_string(uv_strerror(status))); + } + + gpr_free(allocated_addr); + + if (GRPC_TRACER_ON(grpc_tcp_trace)) { + char *port_string; + grpc_sockaddr_to_string(&port_string, addr, 0); + const char *str = grpc_error_string(error); + if (port_string) { + gpr_log(GPR_DEBUG, "SERVER %p add_port %s error=%s", s, port_string, str); + gpr_free(port_string); + } else { + gpr_log(GPR_DEBUG, "SERVER %p add_port error=%s", s, str); + } + } + + if (error != GRPC_ERROR_NONE) { + grpc_error *error_out = GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING( + "Failed to add port to server", &error, 1); + GRPC_ERROR_UNREF(error); + error = error_out; + *port = -1; + } else { + GPR_ASSERT(sp != NULL); + *port = sp->port; + } + return error; +} + +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) { + grpc_tcp_listener *sp; + (void)pollsets; + (void)pollset_count; + GRPC_UV_ASSERT_SAME_THREAD(); + if (GRPC_TRACER_ON(grpc_tcp_trace)) { + gpr_log(GPR_DEBUG, "SERVER_START %p", server); + } + GPR_ASSERT(on_accept_cb); + GPR_ASSERT(!server->on_accept_cb); + server->on_accept_cb = on_accept_cb; + server->on_accept_cb_arg = cb_arg; + for (sp = server->head; sp; sp = sp->next) { + if (sp->has_pending_connection) { + finish_accept(exec_ctx, sp); + sp->has_pending_connection = false; + } + } +} + +void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx *exec_ctx, + grpc_tcp_server *s) {} + +#endif /* GRPC_UV */ |