diff options
Diffstat (limited to 'src/core/lib/surface/lame_client.c')
| -rw-r--r-- | src/core/lib/surface/lame_client.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/core/lib/surface/lame_client.c b/src/core/lib/surface/lame_client.c new file mode 100644 index 0000000000..c1f6812c4e --- /dev/null +++ b/src/core/lib/surface/lame_client.c @@ -0,0 +1,155 @@ +/* + * + * Copyright 2015, 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 "src/core/lib/surface/lame_client.h" + +#include <grpc/grpc.h> + +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> +#include "src/core/lib/channel/channel_stack.h" +#include "src/core/lib/support/string.h" +#include "src/core/lib/surface/api_trace.h" +#include "src/core/lib/surface/call.h" +#include "src/core/lib/surface/channel.h" + +typedef struct { + grpc_linked_mdelem status; + grpc_linked_mdelem details; +} call_data; + +typedef struct { + grpc_status_code error_code; + const char *error_message; +} channel_data; + +static void fill_metadata(grpc_call_element *elem, grpc_metadata_batch *mdb) { + call_data *calld = elem->call_data; + channel_data *chand = elem->channel_data; + char tmp[GPR_LTOA_MIN_BUFSIZE]; + gpr_ltoa(chand->error_code, tmp); + calld->status.md = grpc_mdelem_from_strings("grpc-status", tmp); + calld->details.md = + grpc_mdelem_from_strings("grpc-message", chand->error_message); + calld->status.prev = calld->details.next = NULL; + calld->status.next = &calld->details; + calld->details.prev = &calld->status; + mdb->list.head = &calld->status; + mdb->list.tail = &calld->details; + mdb->deadline = gpr_inf_future(GPR_CLOCK_REALTIME); +} + +static void lame_start_transport_stream_op(grpc_exec_ctx *exec_ctx, + grpc_call_element *elem, + grpc_transport_stream_op *op) { + GRPC_CALL_LOG_OP(GPR_INFO, elem, op); + if (op->recv_initial_metadata != NULL) { + fill_metadata(elem, op->recv_initial_metadata); + } else if (op->recv_trailing_metadata != NULL) { + fill_metadata(elem, op->recv_trailing_metadata); + } + grpc_transport_stream_op_finish_with_failure(exec_ctx, op); +} + +static char *lame_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) { + return NULL; +} + +static void lame_start_transport_op(grpc_exec_ctx *exec_ctx, + grpc_channel_element *elem, + grpc_transport_op *op) { + if (op->on_connectivity_state_change) { + GPR_ASSERT(*op->connectivity_state != GRPC_CHANNEL_FATAL_FAILURE); + *op->connectivity_state = GRPC_CHANNEL_FATAL_FAILURE; + op->on_connectivity_state_change->cb( + exec_ctx, op->on_connectivity_state_change->cb_arg, 1); + } + if (op->on_consumed != NULL) { + op->on_consumed->cb(exec_ctx, op->on_consumed->cb_arg, 1); + } +} + +static void init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, + grpc_call_element_args *args) {} + +static void destroy_call_elem(grpc_exec_ctx *exec_ctx, + grpc_call_element *elem) {} + +static void init_channel_elem(grpc_exec_ctx *exec_ctx, + grpc_channel_element *elem, + grpc_channel_element_args *args) { + GPR_ASSERT(args->is_first); + GPR_ASSERT(args->is_last); +} + +static void destroy_channel_elem(grpc_exec_ctx *exec_ctx, + grpc_channel_element *elem) {} + +const grpc_channel_filter grpc_lame_filter = { + lame_start_transport_stream_op, + lame_start_transport_op, + sizeof(call_data), + init_call_elem, + grpc_call_stack_ignore_set_pollset, + destroy_call_elem, + sizeof(channel_data), + init_channel_elem, + destroy_channel_elem, + lame_get_peer, + "lame-client", +}; + +#define CHANNEL_STACK_FROM_CHANNEL(c) ((grpc_channel_stack *)((c) + 1)) + +grpc_channel *grpc_lame_client_channel_create(const char *target, + grpc_status_code error_code, + const char *error_message) { + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + grpc_channel_element *elem; + channel_data *chand; + grpc_channel *channel = grpc_channel_create(&exec_ctx, target, NULL, + GRPC_CLIENT_LAME_CHANNEL, NULL); + elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0); + GRPC_API_TRACE( + "grpc_lame_client_channel_create(target=%s, error_code=%d, " + "error_message=%s)", + 3, (target, (int)error_code, error_message)); + GPR_ASSERT(elem->filter == &grpc_lame_filter); + chand = (channel_data *)elem->channel_data; + chand->error_code = error_code; + chand->error_message = error_message; + grpc_exec_ctx_finish(&exec_ctx); + return channel; +} |