diff options
Diffstat (limited to 'src/core/lib/iomgr/tcp_client_uv.cc')
| -rw-r--r-- | src/core/lib/iomgr/tcp_client_uv.cc | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/tcp_client_uv.cc b/src/core/lib/iomgr/tcp_client_uv.cc new file mode 100644 index 0000000000..f3e9366299 --- /dev/null +++ b/src/core/lib/iomgr/tcp_client_uv.cc @@ -0,0 +1,183 @@ +/* + * + * Copyright 2016 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 <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> + +#include "src/core/lib/iomgr/error.h" +#include "src/core/lib/iomgr/iomgr_uv.h" +#include "src/core/lib/iomgr/sockaddr_utils.h" +#include "src/core/lib/iomgr/tcp_client.h" +#include "src/core/lib/iomgr/tcp_uv.h" +#include "src/core/lib/iomgr/timer.h" + +extern grpc_tracer_flag grpc_tcp_trace; + +typedef struct grpc_uv_tcp_connect { + uv_connect_t connect_req; + grpc_timer alarm; + grpc_closure on_alarm; + uv_tcp_t *tcp_handle; + grpc_closure *closure; + grpc_endpoint **endpoint; + int refs; + char *addr_name; + grpc_resource_quota *resource_quota; +} grpc_uv_tcp_connect; + +static void uv_tcp_connect_cleanup(grpc_exec_ctx *exec_ctx, + grpc_uv_tcp_connect *connect) { + grpc_resource_quota_unref_internal(exec_ctx, connect->resource_quota); + gpr_free(connect->addr_name); + gpr_free(connect); +} + +static void tcp_close_callback(uv_handle_t *handle) { gpr_free(handle); } + +static void uv_tc_on_alarm(grpc_exec_ctx *exec_ctx, void *acp, + grpc_error *error) { + int done; + grpc_uv_tcp_connect *connect = (grpc_uv_tcp_connect *)acp; + if (GRPC_TRACER_ON(grpc_tcp_trace)) { + const char *str = grpc_error_string(error); + gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: on_alarm: error=%s", + connect->addr_name, str); + } + if (error == GRPC_ERROR_NONE) { + /* error == NONE implies that the timer ran out, and wasn't cancelled. If + it was cancelled, then the handler that cancelled it also should close + the handle, if applicable */ + uv_close((uv_handle_t *)connect->tcp_handle, tcp_close_callback); + } + done = (--connect->refs == 0); + if (done) { + uv_tcp_connect_cleanup(exec_ctx, connect); + } +} + +static void uv_tc_on_connect(uv_connect_t *req, int status) { + grpc_uv_tcp_connect *connect = (grpc_uv_tcp_connect *)req->data; + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + grpc_error *error = GRPC_ERROR_NONE; + int done; + grpc_closure *closure = connect->closure; + grpc_timer_cancel(&exec_ctx, &connect->alarm); + if (status == 0) { + *connect->endpoint = grpc_tcp_create( + connect->tcp_handle, connect->resource_quota, connect->addr_name); + } else { + error = GRPC_ERROR_CREATE_FROM_STATIC_STRING( + "Failed to connect to remote host"); + error = grpc_error_set_int(error, GRPC_ERROR_INT_ERRNO, -status); + error = + grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR, + grpc_slice_from_static_string(uv_strerror(status))); + if (status == UV_ECANCELED) { + error = + grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR, + grpc_slice_from_static_string("Timeout occurred")); + // This should only happen if the handle is already closed + } else { + error = grpc_error_set_str( + error, GRPC_ERROR_STR_OS_ERROR, + grpc_slice_from_static_string(uv_strerror(status))); + uv_close((uv_handle_t *)connect->tcp_handle, tcp_close_callback); + } + } + done = (--connect->refs == 0); + if (done) { + grpc_exec_ctx_flush(&exec_ctx); + uv_tcp_connect_cleanup(&exec_ctx, connect); + } + GRPC_CLOSURE_SCHED(&exec_ctx, closure, error); + grpc_exec_ctx_finish(&exec_ctx); +} + +static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx, + grpc_closure *closure, grpc_endpoint **ep, + grpc_pollset_set *interested_parties, + const grpc_channel_args *channel_args, + const grpc_resolved_address *resolved_addr, + grpc_millis deadline) { + grpc_uv_tcp_connect *connect; + grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL); + (void)channel_args; + (void)interested_parties; + + GRPC_UV_ASSERT_SAME_THREAD(); + + if (channel_args != NULL) { + for (size_t i = 0; i < channel_args->num_args; i++) { + if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) { + grpc_resource_quota_unref_internal(exec_ctx, resource_quota); + resource_quota = grpc_resource_quota_ref_internal( + (grpc_resource_quota *)channel_args->args[i].value.pointer.p); + } + } + } + + connect = (grpc_uv_tcp_connect *)gpr_zalloc(sizeof(grpc_uv_tcp_connect)); + connect->closure = closure; + connect->endpoint = ep; + connect->tcp_handle = (uv_tcp_t *)gpr_malloc(sizeof(uv_tcp_t)); + connect->addr_name = grpc_sockaddr_to_uri(resolved_addr); + connect->resource_quota = resource_quota; + uv_tcp_init(uv_default_loop(), connect->tcp_handle); + connect->connect_req.data = connect; + connect->refs = 2; // One for the connect operation, one for the timer. + + if (GRPC_TRACER_ON(grpc_tcp_trace)) { + gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: asynchronously connecting", + connect->addr_name); + } + + // TODO(murgatroid99): figure out what the return value here means + uv_tcp_connect(&connect->connect_req, connect->tcp_handle, + (const struct sockaddr *)resolved_addr->addr, + uv_tc_on_connect); + GRPC_CLOSURE_INIT(&connect->on_alarm, uv_tc_on_alarm, connect, + grpc_schedule_on_exec_ctx); + grpc_timer_init(exec_ctx, &connect->alarm, deadline, &connect->on_alarm); +} + +// overridden by api_fuzzer.c +extern "C" { +void (*grpc_tcp_client_connect_impl)( + grpc_exec_ctx *exec_ctx, grpc_closure *closure, grpc_endpoint **ep, + grpc_pollset_set *interested_parties, const grpc_channel_args *channel_args, + const grpc_resolved_address *addr, + grpc_millis deadline) = tcp_client_connect_impl; +} + +void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure, + grpc_endpoint **ep, + grpc_pollset_set *interested_parties, + const grpc_channel_args *channel_args, + const grpc_resolved_address *addr, + grpc_millis deadline) { + grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties, + channel_args, addr, deadline); +} + +#endif /* GRPC_UV */ |