diff options
author | Craig Tiller <ctiller@google.com> | 2016-05-18 15:06:21 -0700 |
---|---|---|
committer | Craig Tiller <ctiller@google.com> | 2016-05-18 15:06:21 -0700 |
commit | 9780f59a06ebe8a2f4c971f2984d3236a027392c (patch) | |
tree | b5019158a1407d048ce274647f9ad3d3b8794e9a /src/core/ext/transport | |
parent | 68897999237ab5d67278365b3bd444960fa3c4c0 (diff) | |
parent | fcbe7daf832dcb616fc93ca59c3b1aab279f510e (diff) |
Merge github.com:grpc/grpc into signal_handler
Diffstat (limited to 'src/core/ext/transport')
11 files changed, 975 insertions, 66 deletions
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c index 8c8593748d..b6886a2201 100644 --- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c +++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c @@ -56,6 +56,8 @@ #define DEFAULT_CONNECTION_WINDOW_TARGET (1024 * 1024) #define MAX_WINDOW 0x7fffffffu +#define DEFAULT_MAX_HEADER_LIST_SIZE (16 * 1024) + #define MAX_CLIENT_STREAM_ID 0x7fffffffu int grpc_http_trace = 0; @@ -65,8 +67,8 @@ int grpc_flowctl_trace = 0; ((grpc_chttp2_transport *)((char *)(tw)-offsetof(grpc_chttp2_transport, \ writing))) -#define TRANSPORT_FROM_PARSING(tw) \ - ((grpc_chttp2_transport *)((char *)(tw)-offsetof(grpc_chttp2_transport, \ +#define TRANSPORT_FROM_PARSING(tp) \ + ((grpc_chttp2_transport *)((char *)(tp)-offsetof(grpc_chttp2_transport, \ parsing))) #define TRANSPORT_FROM_GLOBAL(tg) \ @@ -311,6 +313,8 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, push_setting(t, GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 0); } push_setting(t, GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, DEFAULT_WINDOW); + push_setting(t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, + DEFAULT_MAX_HEADER_LIST_SIZE); if (channel_args) { for (i = 0; i < channel_args->num_args; i++) { @@ -378,6 +382,18 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, &t->writing.hpack_compressor, (uint32_t)channel_args->args[i].value.integer); } + } else if (0 == strcmp(channel_args->args[i].key, + GRPC_ARG_MAX_METADATA_SIZE)) { + if (channel_args->args[i].type != GRPC_ARG_INTEGER) { + gpr_log(GPR_ERROR, "%s: must be an integer", + GRPC_ARG_MAX_METADATA_SIZE); + } else if (channel_args->args[i].value.integer < 0) { + gpr_log(GPR_ERROR, "%s: must be non-negative", + GRPC_ARG_MAX_METADATA_SIZE); + } else { + push_setting(t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, + (uint32_t)channel_args->args[i].value.integer); + } } } } @@ -510,7 +526,7 @@ static int init_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt, [GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]; *t->accepting_stream = s; grpc_chttp2_stream_map_add(&t->parsing_stream_map, s->global.id, s); - s->global.in_stream_map = 1; + s->global.in_stream_map = true; } grpc_chttp2_run_with_global_lock(exec_ctx, t, s, finish_init_stream_locked, @@ -783,7 +799,8 @@ void grpc_chttp2_add_incoming_goaway( grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global, uint32_t goaway_error, gpr_slice goaway_text) { char *msg = gpr_dump_slice(goaway_text, GPR_DUMP_HEX | GPR_DUMP_ASCII); - gpr_log(GPR_DEBUG, "got goaway [%d]: %s", goaway_error, msg); + GRPC_CHTTP2_IF_TRACING( + gpr_log(GPR_DEBUG, "got goaway [%d]: %s", goaway_error, msg)); gpr_free(msg); gpr_slice_unref(goaway_text); transport_global->seen_goaway = 1; @@ -833,7 +850,7 @@ static void maybe_start_some_streams( grpc_chttp2_stream_map_add( &TRANSPORT_FROM_GLOBAL(transport_global)->new_stream_map, stream_global->id, STREAM_FROM_GLOBAL(stream_global)); - stream_global->in_stream_map = 1; + stream_global->in_stream_map = true; transport_global->concurrent_stream_count++; grpc_chttp2_become_writable(transport_global, stream_global); } @@ -932,24 +949,38 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, stream_global->send_initial_metadata_finished = add_closure_barrier(on_complete); stream_global->send_initial_metadata = op->send_initial_metadata; - if (contains_non_ok_status(transport_global, op->send_initial_metadata)) { - stream_global->seen_error = 1; - grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); - } - if (!stream_global->write_closed) { - if (transport_global->is_client) { - GPR_ASSERT(stream_global->id == 0); - grpc_chttp2_list_add_waiting_for_concurrency(transport_global, - stream_global); - maybe_start_some_streams(exec_ctx, transport_global); + const size_t metadata_size = + grpc_metadata_batch_size(op->send_initial_metadata); + const size_t metadata_peer_limit = + transport_global->settings[GRPC_PEER_SETTINGS] + [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE]; + if (metadata_size > metadata_peer_limit) { + gpr_log(GPR_DEBUG, + "to-be-sent initial metadata size exceeds peer limit " + "(%lu vs. %lu)", + metadata_size, metadata_peer_limit); + cancel_from_api(exec_ctx, transport_global, stream_global, + GRPC_STATUS_RESOURCE_EXHAUSTED); + } else { + if (contains_non_ok_status(transport_global, op->send_initial_metadata)) { + stream_global->seen_error = true; + grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); + } + if (!stream_global->write_closed) { + if (transport_global->is_client) { + GPR_ASSERT(stream_global->id == 0); + grpc_chttp2_list_add_waiting_for_concurrency(transport_global, + stream_global); + maybe_start_some_streams(exec_ctx, transport_global); + } else { + GPR_ASSERT(stream_global->id != 0); + grpc_chttp2_become_writable(transport_global, stream_global); + } } else { - GPR_ASSERT(stream_global->id != 0); - grpc_chttp2_become_writable(transport_global, stream_global); + grpc_chttp2_complete_closure_step( + exec_ctx, stream_global, + &stream_global->send_initial_metadata_finished, 0); } - } else { - grpc_chttp2_complete_closure_step( - exec_ctx, stream_global, - &stream_global->send_initial_metadata_finished, 0); } } @@ -973,19 +1004,34 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, stream_global->send_trailing_metadata_finished = add_closure_barrier(on_complete); stream_global->send_trailing_metadata = op->send_trailing_metadata; - if (contains_non_ok_status(transport_global, op->send_trailing_metadata)) { - stream_global->seen_error = 1; - grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); - } - if (stream_global->write_closed) { - grpc_chttp2_complete_closure_step( - exec_ctx, stream_global, - &stream_global->send_trailing_metadata_finished, - grpc_metadata_batch_is_empty(op->send_trailing_metadata)); - } else if (stream_global->id != 0) { - /* TODO(ctiller): check if there's flow control for any outstanding - bytes before going writable */ - grpc_chttp2_become_writable(transport_global, stream_global); + const size_t metadata_size = + grpc_metadata_batch_size(op->send_trailing_metadata); + const size_t metadata_peer_limit = + transport_global->settings[GRPC_PEER_SETTINGS] + [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE]; + if (metadata_size > metadata_peer_limit) { + gpr_log(GPR_DEBUG, + "to-be-sent trailing metadata size exceeds peer limit " + "(%lu vs. %lu)", + metadata_size, metadata_peer_limit); + cancel_from_api(exec_ctx, transport_global, stream_global, + GRPC_STATUS_RESOURCE_EXHAUSTED); + } else { + if (contains_non_ok_status(transport_global, + op->send_trailing_metadata)) { + stream_global->seen_error = true; + grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); + } + if (stream_global->write_closed) { + grpc_chttp2_complete_closure_step( + exec_ctx, stream_global, + &stream_global->send_trailing_metadata_finished, + grpc_metadata_batch_is_empty(op->send_trailing_metadata)); + } else if (stream_global->id != 0) { + /* TODO(ctiller): check if there's flow control for any outstanding + bytes before going writable */ + grpc_chttp2_become_writable(transport_global, stream_global); + } } } @@ -1148,6 +1194,16 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx, grpc_chttp2_list_pop_check_read_ops(transport_global, &stream_global)) { if (stream_global->recv_initial_metadata_ready != NULL && stream_global->published_initial_metadata) { + if (stream_global->seen_error) { + while ((bs = grpc_chttp2_incoming_frame_queue_pop( + &stream_global->incoming_frames)) != NULL) { + incoming_byte_stream_destroy_locked(exec_ctx, NULL, NULL, bs); + } + if (stream_global->exceeded_metadata_size) { + cancel_from_api(exec_ctx, transport_global, stream_global, + GRPC_STATUS_RESOURCE_EXHAUSTED); + } + } grpc_chttp2_incoming_metadata_buffer_publish( &stream_global->received_initial_metadata, stream_global->recv_initial_metadata); @@ -1177,10 +1233,15 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx, } if (stream_global->recv_trailing_metadata_finished != NULL && stream_global->read_closed && stream_global->write_closed) { - while (stream_global->seen_error && - (bs = grpc_chttp2_incoming_frame_queue_pop( - &stream_global->incoming_frames)) != NULL) { - incoming_byte_stream_destroy_locked(exec_ctx, NULL, NULL, bs); + if (stream_global->seen_error) { + while ((bs = grpc_chttp2_incoming_frame_queue_pop( + &stream_global->incoming_frames)) != NULL) { + incoming_byte_stream_destroy_locked(exec_ctx, NULL, NULL, bs); + } + if (stream_global->exceeded_metadata_size) { + cancel_from_api(exec_ctx, transport_global, stream_global, + GRPC_STATUS_RESOURCE_EXHAUSTED); + } } if (stream_global->all_incoming_byte_streams_finished) { grpc_chttp2_incoming_metadata_buffer_publish( @@ -1212,7 +1273,7 @@ static void remove_stream(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, s = grpc_chttp2_stream_map_delete(&t->new_stream_map, id); } GPR_ASSERT(s); - s->global.in_stream_map = 0; + s->global.in_stream_map = false; if (t->parsing.incoming_stream == &s->parsing) { t->parsing.incoming_stream = NULL; grpc_chttp2_parsing_become_skip_parser(exec_ctx, &t->parsing); @@ -1256,7 +1317,7 @@ static void cancel_from_api(grpc_exec_ctx *exec_ctx, NULL); } if (status != GRPC_STATUS_OK && !stream_global->seen_error) { - stream_global->seen_error = 1; + stream_global->seen_error = true; grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); } grpc_chttp2_mark_stream_closed(exec_ctx, transport_global, stream_global, 1, @@ -1268,7 +1329,7 @@ void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx, grpc_chttp2_stream_global *stream_global, grpc_status_code status, gpr_slice *slice) { if (status != GRPC_STATUS_OK) { - stream_global->seen_error = 1; + stream_global->seen_error = true; grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); } /* stream_global->recv_trailing_metadata_finished gives us a @@ -1292,7 +1353,7 @@ void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx, GRPC_MDSTR_GRPC_MESSAGE, grpc_mdstr_from_slice(gpr_slice_ref(*slice)))); } - stream_global->published_trailing_metadata = 1; + stream_global->published_trailing_metadata = true; grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); } if (slice) { @@ -1322,13 +1383,13 @@ void grpc_chttp2_mark_stream_closed( } grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); if (close_reads && !stream_global->read_closed) { - stream_global->read_closed = 1; - stream_global->published_initial_metadata = 1; - stream_global->published_trailing_metadata = 1; + stream_global->read_closed = true; + stream_global->published_initial_metadata = true; + stream_global->published_trailing_metadata = true; decrement_active_streams_locked(exec_ctx, transport_global, stream_global); } if (close_writes && !stream_global->write_closed) { - stream_global->write_closed = 1; + stream_global->write_closed = true; if (TRANSPORT_FROM_GLOBAL(transport_global)->executor.writing_active) { GRPC_CHTTP2_STREAM_REF(stream_global, "finish_writes"); grpc_chttp2_list_add_closed_waiting_for_writing(transport_global, diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.c b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c index 22467e9ddd..7f01105e3e 100644 --- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.c +++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c @@ -45,15 +45,20 @@ gpr_slice grpc_chttp2_rst_stream_create(uint32_t id, uint32_t code, stats->framing_bytes += frame_size; uint8_t *p = GPR_SLICE_START_PTR(slice); + // Frame size. *p++ = 0; *p++ = 0; *p++ = 4; + // Frame type. *p++ = GRPC_CHTTP2_FRAME_RST_STREAM; + // Flags. *p++ = 0; + // Stream ID. *p++ = (uint8_t)(id >> 24); *p++ = (uint8_t)(id >> 16); *p++ = (uint8_t)(id >> 8); *p++ = (uint8_t)(id); + // Error code. *p++ = (uint8_t)(code >> 24); *p++ = (uint8_t)(code >> 16); *p++ = (uint8_t)(code >> 8); diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.c b/src/core/ext/transport/chttp2/transport/hpack_encoder.c index 555027c866..ebeee37f0d 100644 --- a/src/core/ext/transport/chttp2/transport/hpack_encoder.c +++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.c @@ -63,6 +63,8 @@ /* don't consider adding anything bigger than this to the hpack table */ #define MAX_DECODER_SPACE_USAGE 512 +extern int grpc_http_trace; + typedef struct { int is_first_frame; /* number of bytes in 'output' when we started the frame - used to calculate @@ -532,7 +534,9 @@ void grpc_chttp2_hpack_compressor_set_max_table_size( } } c->advertise_table_size_change = 1; - gpr_log(GPR_DEBUG, "set max table size from encoder to %d", max_table_size); + if (grpc_http_trace) { + gpr_log(GPR_DEBUG, "set max table size from encoder to %d", max_table_size); + } } void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c, diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.c b/src/core/ext/transport/chttp2/transport/hpack_table.c index 4d64506de2..295f31c44f 100644 --- a/src/core/ext/transport/chttp2/transport/hpack_table.c +++ b/src/core/ext/transport/chttp2/transport/hpack_table.c @@ -253,7 +253,9 @@ void grpc_chttp2_hptbl_set_max_bytes(grpc_chttp2_hptbl *tbl, if (tbl->max_bytes == max_bytes) { return; } - gpr_log(GPR_DEBUG, "Update hpack parser max size to %d", max_bytes); + if (grpc_http_trace) { + gpr_log(GPR_DEBUG, "Update hpack parser max size to %d", max_bytes); + } while (tbl->mem_used > max_bytes) { evict1(tbl); } diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.c b/src/core/ext/transport/chttp2/transport/incoming_metadata.c index db21744f0c..3e463a7995 100644 --- a/src/core/ext/transport/chttp2/transport/incoming_metadata.c +++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.c @@ -65,6 +65,7 @@ void grpc_chttp2_incoming_metadata_buffer_add( gpr_realloc(buffer->elems, sizeof(*buffer->elems) * buffer->capacity); } buffer->elems[buffer->count++].md = elem; + buffer->size += GRPC_MDELEM_LENGTH(elem); } void grpc_chttp2_incoming_metadata_buffer_set_deadline( diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.h b/src/core/ext/transport/chttp2/transport/incoming_metadata.h index 17ecf8e181..df4343b93e 100644 --- a/src/core/ext/transport/chttp2/transport/incoming_metadata.h +++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.h @@ -42,6 +42,7 @@ typedef struct { size_t capacity; gpr_timespec deadline; int published; + size_t size; // total size of metadata } grpc_chttp2_incoming_metadata_buffer; /** assumes everything initially zeroed */ diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h index 8c4fa2d34a..5872fd8e0a 100644 --- a/src/core/ext/transport/chttp2/transport/internal.h +++ b/src/core/ext/transport/chttp2/transport/internal.h @@ -422,23 +422,21 @@ typedef struct { /** number of streams that are currently being read */ gpr_refcount active_streams; - /** when the application requests writes be closed, the write_closed is - 'queued'; when the close is flow controlled into the send path, we are - 'sending' it; when the write has been performed it is 'sent' */ + /** Is this stream closed for writing. */ bool write_closed; - /** is this stream reading half-closed (boolean) */ + /** Is this stream reading half-closed. */ bool read_closed; - /** are all published incoming byte streams closed */ + /** Are all published incoming byte streams closed. */ bool all_incoming_byte_streams_finished; - /** is this stream in the stream map? (boolean) */ + /** Is this stream in the stream map. */ bool in_stream_map; - /** has this stream seen an error? if 1, then pending incoming frames - can be thrown away */ + /** Has this stream seen an error. + If true, then pending incoming frames can be thrown away. */ bool seen_error; + bool exceeded_metadata_size; bool published_initial_metadata; bool published_trailing_metadata; - bool faked_trailing_metadata; grpc_chttp2_incoming_metadata_buffer received_initial_metadata; grpc_chttp2_incoming_metadata_buffer received_trailing_metadata; @@ -481,7 +479,8 @@ struct grpc_chttp2_stream_parsing { /** which metadata did we get (on this parse) */ uint8_t got_metadata_on_parse[2]; /** should we raise the seen_error flag in transport_global */ - uint8_t seen_error; + bool seen_error; + bool exceeded_metadata_size; /** window available for peer to send to us */ int64_t incoming_window; /** parsing state for data frames */ diff --git a/src/core/ext/transport/chttp2/transport/parsing.c b/src/core/ext/transport/chttp2/transport/parsing.c index 2995066e51..4bd374b7fa 100644 --- a/src/core/ext/transport/chttp2/transport/parsing.c +++ b/src/core/ext/transport/chttp2/transport/parsing.c @@ -45,6 +45,10 @@ #include "src/core/lib/profiling/timers.h" #include "src/core/lib/transport/static_metadata.h" +#define TRANSPORT_FROM_PARSING(tp) \ + ((grpc_chttp2_transport *)((char *)(tp)-offsetof(grpc_chttp2_transport, \ + parsing))) + static int init_frame_parser(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_parsing *transport_parsing); static int init_header_frame_parser( @@ -170,7 +174,9 @@ void grpc_chttp2_publish_reads( while (grpc_chttp2_list_pop_parsing_seen_stream( transport_global, transport_parsing, &stream_global, &stream_parsing)) { if (stream_parsing->seen_error) { - stream_global->seen_error = 1; + stream_global->seen_error = true; + stream_global->exceeded_metadata_size = + stream_parsing->exceeded_metadata_size; grpc_chttp2_list_add_check_read_ops(transport_global, stream_global); } @@ -612,7 +618,7 @@ static void on_initial_header(void *tp, grpc_mdelem *md) { if (md->key == GRPC_MDSTR_GRPC_STATUS && md != GRPC_MDELEM_GRPC_STATUS_0) { /* TODO(ctiller): check for a status like " 0" */ - stream_parsing->seen_error = 1; + stream_parsing->seen_error = true; } if (md->key == GRPC_MDSTR_GRPC_TIMEOUT) { @@ -633,8 +639,26 @@ static void on_initial_header(void *tp, grpc_mdelem *md) { gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC), *cached_timeout)); GRPC_MDELEM_UNREF(md); } else { - grpc_chttp2_incoming_metadata_buffer_add( - &stream_parsing->metadata_buffer[0], md); + const size_t new_size = + stream_parsing->metadata_buffer[0].size + GRPC_MDELEM_LENGTH(md); + grpc_chttp2_transport_global *transport_global = + &TRANSPORT_FROM_PARSING(transport_parsing)->global; + const size_t metadata_size_limit = + transport_global->settings[GRPC_LOCAL_SETTINGS] + [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE]; + if (new_size > metadata_size_limit) { + if (!stream_parsing->exceeded_metadata_size) { + gpr_log(GPR_DEBUG, + "received initial metadata size exceeds limit (%lu vs. %lu)", + new_size, metadata_size_limit); + stream_parsing->seen_error = true; + stream_parsing->exceeded_metadata_size = true; + } + GRPC_MDELEM_UNREF(md); + } else { + grpc_chttp2_incoming_metadata_buffer_add( + &stream_parsing->metadata_buffer[0], md); + } } grpc_chttp2_list_add_parsing_seen_stream(transport_parsing, stream_parsing); @@ -658,12 +682,30 @@ static void on_trailing_header(void *tp, grpc_mdelem *md) { if (md->key == GRPC_MDSTR_GRPC_STATUS && md != GRPC_MDELEM_GRPC_STATUS_0) { /* TODO(ctiller): check for a status like " 0" */ - stream_parsing->seen_error = 1; + stream_parsing->seen_error = true; + } + + const size_t new_size = + stream_parsing->metadata_buffer[1].size + GRPC_MDELEM_LENGTH(md); + grpc_chttp2_transport_global *transport_global = + &TRANSPORT_FROM_PARSING(transport_parsing)->global; + const size_t metadata_size_limit = + transport_global->settings[GRPC_LOCAL_SETTINGS] + [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE]; + if (new_size > metadata_size_limit) { + if (!stream_parsing->exceeded_metadata_size) { + gpr_log(GPR_DEBUG, + "received trailing metadata size exceeds limit (%lu vs. %lu)", + new_size, metadata_size_limit); + stream_parsing->seen_error = true; + stream_parsing->exceeded_metadata_size = true; + } + GRPC_MDELEM_UNREF(md); + } else { + grpc_chttp2_incoming_metadata_buffer_add( + &stream_parsing->metadata_buffer[1], md); } - grpc_chttp2_incoming_metadata_buffer_add(&stream_parsing->metadata_buffer[1], - md); - grpc_chttp2_list_add_parsing_seen_stream(transport_parsing, stream_parsing); GPR_TIMER_END("on_trailing_header", 0); diff --git a/src/core/ext/transport/cronet/client/secure/cronet_channel_create.c b/src/core/ext/transport/cronet/client/secure/cronet_channel_create.c new file mode 100644 index 0000000000..df1acddcc0 --- /dev/null +++ b/src/core/ext/transport/cronet/client/secure/cronet_channel_create.c @@ -0,0 +1,69 @@ +/* + * + * Copyright 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/impl/codegen/port_platform.h> + +#include <stdio.h> +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> + +#include "src/core/lib/surface/channel.h" +#include "src/core/lib/transport/transport_impl.h" + +// Cronet transport object +typedef struct cronet_transport { + grpc_transport base; // must be first element in this structure + void *engine; + char *host; +} cronet_transport; + +extern grpc_transport_vtable grpc_cronet_vtable; + +GRPCAPI grpc_channel *grpc_cronet_secure_channel_create( + void *engine, const char *target, const grpc_channel_args *args, + void *reserved) { + cronet_transport *ct = gpr_malloc(sizeof(cronet_transport)); + ct->base.vtable = &grpc_cronet_vtable; + ct->engine = engine; + ct->host = gpr_malloc(strlen(target) + 1); + strcpy(ct->host, target); + gpr_log(GPR_DEBUG, + "grpc_create_cronet_transport: cronet_engine = %p, target=%s", engine, + ct->host); + + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + return grpc_channel_create(&exec_ctx, target, args, + GRPC_CLIENT_DIRECT_CHANNEL, (grpc_transport *)ct); +} diff --git a/src/core/ext/transport/cronet/transport/cronet_api_dummy.c b/src/core/ext/transport/cronet/transport/cronet_api_dummy.c new file mode 100644 index 0000000000..687026c9fd --- /dev/null +++ b/src/core/ext/transport/cronet/transport/cronet_api_dummy.c @@ -0,0 +1,85 @@ +/* + * + * Copyright 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. + * + */ + +/* This file has empty implementation of all the functions exposed by the cronet +library, so we can build it in all environments */ + +#include <stdbool.h> + +#include <grpc/support/log.h> + +#include "third_party/objective_c/Cronet/cronet_c_for_grpc.h" + +#ifdef GRPC_COMPILE_WITH_CRONET +/* link with the real CRONET library in the build system */ +#else +/* Dummy implementation of cronet API just to test for build-ability */ +cronet_bidirectional_stream* cronet_bidirectional_stream_create( + cronet_engine* engine, void* annotation, + cronet_bidirectional_stream_callback* callback) { + GPR_ASSERT(0); + return NULL; +} + +int cronet_bidirectional_stream_destroy(cronet_bidirectional_stream* stream) { + GPR_ASSERT(0); + return 0; +} + +int cronet_bidirectional_stream_start( + cronet_bidirectional_stream* stream, const char* url, int priority, + const char* method, const cronet_bidirectional_stream_header_array* headers, + bool end_of_stream) { + GPR_ASSERT(0); + return 0; +} + +int cronet_bidirectional_stream_read(cronet_bidirectional_stream* stream, + char* buffer, int capacity) { + GPR_ASSERT(0); + return 0; +} + +int cronet_bidirectional_stream_write(cronet_bidirectional_stream* stream, + const char* buffer, int count, + bool end_of_stream) { + GPR_ASSERT(0); + return 0; +} + +int cronet_bidirectional_stream_cancel(cronet_bidirectional_stream* stream) { + GPR_ASSERT(0); + return 0; +} + +#endif /* GRPC_COMPILE_WITH_CRONET */ diff --git a/src/core/ext/transport/cronet/transport/cronet_transport.c b/src/core/ext/transport/cronet/transport/cronet_transport.c new file mode 100644 index 0000000000..5bb085195c --- /dev/null +++ b/src/core/ext/transport/cronet/transport/cronet_transport.c @@ -0,0 +1,640 @@ +/* + * + * Copyright 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 <string.h> + +#include <grpc/impl/codegen/port_platform.h> +#include <grpc/support/alloc.h> +#include <grpc/support/host_port.h> +#include <grpc/support/log.h> +#include <grpc/support/slice_buffer.h> +#include <grpc/support/string_util.h> +#include <grpc/support/useful.h> + +#include "src/core/ext/transport/chttp2/transport/incoming_metadata.h" +#include "src/core/lib/iomgr/exec_ctx.h" +#include "src/core/lib/support/string.h" +#include "src/core/lib/surface/channel.h" +#include "src/core/lib/transport/metadata_batch.h" +#include "src/core/lib/transport/transport_impl.h" +#include "third_party/objective_c/Cronet/cronet_c_for_grpc.h" + +#define GRPC_HEADER_SIZE_IN_BYTES 5 + +// Global flag that gets set with GRPC_TRACE env variable +int grpc_cronet_trace = 1; + +// Cronet transport object +struct grpc_cronet_transport { + grpc_transport base; /* must be first element in this structure */ + cronet_engine *engine; + char *host; +}; + +typedef struct grpc_cronet_transport grpc_cronet_transport; + +enum send_state { + CRONET_SEND_IDLE = 0, + CRONET_REQ_STARTED, + CRONET_SEND_HEADER, + CRONET_WRITE, + CRONET_WRITE_COMPLETED, +}; + +enum recv_state { + CRONET_RECV_IDLE = 0, + CRONET_RECV_READ_LENGTH, + CRONET_RECV_READ_DATA, + CRONET_RECV_CLOSED, +}; + +static const char *recv_state_name[] = { + "CRONET_RECV_IDLE", "CRONET_RECV_READ_LENGTH", "CRONET_RECV_READ_DATA,", + "CRONET_RECV_CLOSED"}; + +// Enum that identifies calling function. +enum e_caller { + PERFORM_STREAM_OP, + ON_READ_COMPLETE, + ON_RESPONSE_HEADERS_RECEIVED, + ON_RESPONSE_TRAILERS_RECEIVED +}; + +enum callback_id { + CB_SEND_INITIAL_METADATA = 0, + CB_SEND_MESSAGE, + CB_SEND_TRAILING_METADATA, + CB_RECV_MESSAGE, + CB_RECV_INITIAL_METADATA, + CB_RECV_TRAILING_METADATA, + CB_NUM_CALLBACKS +}; + +struct stream_obj { + // we store received bytes here as they trickle in. + gpr_slice_buffer write_slice_buffer; + cronet_bidirectional_stream *cbs; + gpr_slice slice; + gpr_slice_buffer read_slice_buffer; + struct grpc_slice_buffer_stream sbs; + char *read_buffer; + int remaining_read_bytes; + int total_read_bytes; + + char *write_buffer; + size_t write_buffer_size; + + // Hold the URL + char *url; + + bool response_headers_received; + bool read_requested; + bool response_trailers_received; + bool read_closed; + + // Recv message stuff + grpc_byte_buffer **recv_message; + // Initial metadata stuff + grpc_metadata_batch *recv_initial_metadata; + // Trailing metadata stuff + grpc_metadata_batch *recv_trailing_metadata; + grpc_chttp2_incoming_metadata_buffer imb; + + // This mutex protects receive state machine execution + gpr_mu recv_mu; + // we can queue up up to 2 callbacks for each OP + grpc_closure *callback_list[CB_NUM_CALLBACKS][2]; + + // storage for header + cronet_bidirectional_stream_header *headers; + uint32_t num_headers; + cronet_bidirectional_stream_header_array header_array; + // state tracking + enum recv_state cronet_recv_state; + enum send_state cronet_send_state; +}; + +typedef struct stream_obj stream_obj; + +static void next_send_step(stream_obj *s); +static void next_recv_step(stream_obj *s, enum e_caller caller); + +static void set_pollset_do_nothing(grpc_exec_ctx *exec_ctx, grpc_transport *gt, + grpc_stream *gs, grpc_pollset *pollset) {} + +static void enqueue_callbacks(grpc_closure *callback_list[]) { + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + if (callback_list[0]) { + grpc_exec_ctx_enqueue(&exec_ctx, callback_list[0], true, NULL); + callback_list[0] = NULL; + } + if (callback_list[1]) { + grpc_exec_ctx_enqueue(&exec_ctx, callback_list[1], true, NULL); + callback_list[1] = NULL; + } + grpc_exec_ctx_finish(&exec_ctx); +} + +static void on_canceled(cronet_bidirectional_stream *stream) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "on_canceled %p", stream); + } +} + +static void on_failed(cronet_bidirectional_stream *stream, int net_error) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "on_failed %p, error = %d", stream, net_error); + } +} + +static void on_succeeded(cronet_bidirectional_stream *stream) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "on_succeeded %p", stream); + } +} + +static void on_response_trailers_received( + cronet_bidirectional_stream *stream, + const cronet_bidirectional_stream_header_array *trailers) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "R: on_response_trailers_received"); + } + stream_obj *s = (stream_obj *)stream->annotation; + + memset(&s->imb, 0, sizeof(s->imb)); + grpc_chttp2_incoming_metadata_buffer_init(&s->imb); + unsigned int i = 0; + for (i = 0; i < trailers->count; i++) { + grpc_chttp2_incoming_metadata_buffer_add( + &s->imb, grpc_mdelem_from_metadata_strings( + grpc_mdstr_from_string(trailers->headers[i].key), + grpc_mdstr_from_string(trailers->headers[i].value))); + } + s->response_trailers_received = true; + next_recv_step(s, ON_RESPONSE_TRAILERS_RECEIVED); +} + +static void on_write_completed(cronet_bidirectional_stream *stream, + const char *data) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "W: on_write_completed"); + } + stream_obj *s = (stream_obj *)stream->annotation; + enqueue_callbacks(s->callback_list[CB_SEND_MESSAGE]); + s->cronet_send_state = CRONET_WRITE_COMPLETED; + next_send_step(s); +} + +static void process_recv_message(stream_obj *s, const uint8_t *recv_data) { + gpr_slice read_data_slice = gpr_slice_malloc((uint32_t)s->total_read_bytes); + uint8_t *dst_p = GPR_SLICE_START_PTR(read_data_slice); + memcpy(dst_p, recv_data, (size_t)s->total_read_bytes); + gpr_slice_buffer_add(&s->read_slice_buffer, read_data_slice); + grpc_slice_buffer_stream_init(&s->sbs, &s->read_slice_buffer, 0); + *s->recv_message = (grpc_byte_buffer *)&s->sbs; +} + +static int parse_grpc_header(const uint8_t *data) { + const uint8_t *p = data + 1; + int length = 0; + length |= ((uint8_t)*p++) << 24; + length |= ((uint8_t)*p++) << 16; + length |= ((uint8_t)*p++) << 8; + length |= ((uint8_t)*p++); + return length; +} + +static void on_read_completed(cronet_bidirectional_stream *stream, char *data, + int count) { + stream_obj *s = (stream_obj *)stream->annotation; + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "R: on_read_completed count=%d, total=%d, remaining=%d", + count, s->total_read_bytes, s->remaining_read_bytes); + } + if (count > 0) { + GPR_ASSERT(s->recv_message); + s->remaining_read_bytes -= count; + next_recv_step(s, ON_READ_COMPLETE); + } else { + s->read_closed = true; + next_recv_step(s, ON_READ_COMPLETE); + } +} + +static void on_response_headers_received( + cronet_bidirectional_stream *stream, + const cronet_bidirectional_stream_header_array *headers, + const char *negotiated_protocol) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "R: on_response_headers_received"); + } + stream_obj *s = (stream_obj *)stream->annotation; + enqueue_callbacks(s->callback_list[CB_RECV_INITIAL_METADATA]); + s->response_headers_received = true; + next_recv_step(s, ON_RESPONSE_HEADERS_RECEIVED); +} + +static void on_request_headers_sent(cronet_bidirectional_stream *stream) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "W: on_request_headers_sent"); + } + stream_obj *s = (stream_obj *)stream->annotation; + enqueue_callbacks(s->callback_list[CB_SEND_INITIAL_METADATA]); + s->cronet_send_state = CRONET_SEND_HEADER; + next_send_step(s); +} + +// Callback function pointers (invoked by cronet in response to events) +static cronet_bidirectional_stream_callback callbacks = { + on_request_headers_sent, + on_response_headers_received, + on_read_completed, + on_write_completed, + on_response_trailers_received, + on_succeeded, + on_failed, + on_canceled}; + +static void invoke_closing_callback(stream_obj *s) { + grpc_chttp2_incoming_metadata_buffer_publish(&s->imb, + s->recv_trailing_metadata); + if (s->callback_list[CB_RECV_TRAILING_METADATA]) { + enqueue_callbacks(s->callback_list[CB_RECV_TRAILING_METADATA]); + } +} + +static void set_recv_state(stream_obj *s, enum recv_state state) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "next_state = %s", recv_state_name[state]); + } + s->cronet_recv_state = state; +} + +// This is invoked from perform_stream_op, and all on_xxxx callbacks. +static void next_recv_step(stream_obj *s, enum e_caller caller) { + gpr_mu_lock(&s->recv_mu); + switch (s->cronet_recv_state) { + case CRONET_RECV_IDLE: + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "cronet_recv_state = CRONET_RECV_IDLE"); + } + if (caller == PERFORM_STREAM_OP || + caller == ON_RESPONSE_HEADERS_RECEIVED) { + if (s->read_closed && s->response_trailers_received) { + invoke_closing_callback(s); + set_recv_state(s, CRONET_RECV_CLOSED); + } else if (s->response_headers_received == true && + s->read_requested == true) { + set_recv_state(s, CRONET_RECV_READ_LENGTH); + s->total_read_bytes = s->remaining_read_bytes = + GRPC_HEADER_SIZE_IN_BYTES; + GPR_ASSERT(s->read_buffer); + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "R: cronet_bidirectional_stream_read()"); + } + cronet_bidirectional_stream_read(s->cbs, s->read_buffer, + s->remaining_read_bytes); + } + } + break; + case CRONET_RECV_READ_LENGTH: + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "cronet_recv_state = CRONET_RECV_READ_LENGTH"); + } + if (caller == ON_READ_COMPLETE) { + if (s->read_closed) { + invoke_closing_callback(s); + enqueue_callbacks(s->callback_list[CB_RECV_MESSAGE]); + set_recv_state(s, CRONET_RECV_CLOSED); + } else { + GPR_ASSERT(s->remaining_read_bytes == 0); + set_recv_state(s, CRONET_RECV_READ_DATA); + s->total_read_bytes = s->remaining_read_bytes = + parse_grpc_header((const uint8_t *)s->read_buffer); + s->read_buffer = + gpr_realloc(s->read_buffer, (uint32_t)s->remaining_read_bytes); + GPR_ASSERT(s->read_buffer); + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "R: cronet_bidirectional_stream_read()"); + } + cronet_bidirectional_stream_read(s->cbs, (char *)s->read_buffer, + s->remaining_read_bytes); + } + } + break; + case CRONET_RECV_READ_DATA: + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "cronet_recv_state = CRONET_RECV_READ_DATA"); + } + if (caller == ON_READ_COMPLETE) { + if (s->remaining_read_bytes > 0) { + int offset = s->total_read_bytes - s->remaining_read_bytes; + GPR_ASSERT(s->read_buffer); + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "R: cronet_bidirectional_stream_read()"); + } + cronet_bidirectional_stream_read( + s->cbs, (char *)s->read_buffer + offset, s->remaining_read_bytes); + } else { + gpr_slice_buffer_init(&s->read_slice_buffer); + uint8_t *p = (uint8_t *)s->read_buffer; + process_recv_message(s, p); + set_recv_state(s, CRONET_RECV_IDLE); + enqueue_callbacks(s->callback_list[CB_RECV_MESSAGE]); + } + } + break; + case CRONET_RECV_CLOSED: + break; + default: + GPR_ASSERT(0); // Should not reach here + break; + } + gpr_mu_unlock(&s->recv_mu); +} + +// This function takes the data from s->write_slice_buffer and assembles into +// a contiguous byte stream with 5 byte gRPC header prepended. +static void create_grpc_frame(stream_obj *s) { + gpr_slice slice = gpr_slice_buffer_take_first(&s->write_slice_buffer); + uint8_t *raw_data = GPR_SLICE_START_PTR(slice); + size_t length = GPR_SLICE_LENGTH(slice); + s->write_buffer_size = length + GRPC_HEADER_SIZE_IN_BYTES; + s->write_buffer = gpr_realloc(s->write_buffer, s->write_buffer_size); + uint8_t *p = (uint8_t *)s->write_buffer; + // Append 5 byte header + *p++ = 0; + *p++ = (uint8_t)(length >> 24); + *p++ = (uint8_t)(length >> 16); + *p++ = (uint8_t)(length >> 8); + *p++ = (uint8_t)(length); + // append actual data + memcpy(p, raw_data, length); +} + +static void do_write(stream_obj *s) { + gpr_slice_buffer *sb = &s->write_slice_buffer; + GPR_ASSERT(sb->count <= 1); + if (sb->count > 0) { + create_grpc_frame(s); + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "W: cronet_bidirectional_stream_write"); + } + cronet_bidirectional_stream_write(s->cbs, s->write_buffer, + (int)s->write_buffer_size, false); + } +} + +// +static void next_send_step(stream_obj *s) { + switch (s->cronet_send_state) { + case CRONET_SEND_IDLE: + GPR_ASSERT( + s->cbs); // cronet_bidirectional_stream is not initialized yet. + s->cronet_send_state = CRONET_REQ_STARTED; + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "cronet_bidirectional_stream_start to %s", s->url); + } + cronet_bidirectional_stream_start(s->cbs, s->url, 0, "POST", + &s->header_array, false); + // we no longer need the memory that was allocated earlier. + gpr_free(s->header_array.headers); + break; + case CRONET_SEND_HEADER: + do_write(s); + s->cronet_send_state = CRONET_WRITE; + break; + case CRONET_WRITE_COMPLETED: + do_write(s); + break; + default: + GPR_ASSERT(0); + break; + } +} + +static void convert_metadata_to_cronet_headers(grpc_linked_mdelem *head, + const char *host, + stream_obj *s) { + grpc_linked_mdelem *curr = head; + // Walk the linked list and get number of header fields + uint32_t num_headers_available = 0; + while (curr != NULL) { + curr = curr->next; + num_headers_available++; + } + // Allocate enough memory + s->headers = (cronet_bidirectional_stream_header *)gpr_malloc( + sizeof(cronet_bidirectional_stream_header) * num_headers_available); + + // Walk the linked list again, this time copying the header fields. + // s->num_headers + // can be less than num_headers_available, as some headers are not used for + // cronet + curr = head; + s->num_headers = 0; + while (s->num_headers < num_headers_available) { + grpc_mdelem *mdelem = curr->md; + curr = curr->next; + const char *key = grpc_mdstr_as_c_string(mdelem->key); + const char *value = grpc_mdstr_as_c_string(mdelem->value); + if (strcmp(key, ":scheme") == 0 || strcmp(key, ":method") == 0 || + strcmp(key, ":authority") == 0) { + // Cronet populates these fields on its own. + continue; + } + if (strcmp(key, ":path") == 0) { + // Create URL by appending :path value to the hostname + gpr_asprintf(&s->url, "https://%s%s", host, value); + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "extracted URL = %s", s->url); + } + continue; + } + s->headers[s->num_headers].key = key; + s->headers[s->num_headers].value = value; + s->num_headers++; + if (curr == NULL) { + break; + } + } +} + +static void perform_stream_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt, + grpc_stream *gs, grpc_transport_stream_op *op) { + grpc_cronet_transport *ct = (grpc_cronet_transport *)gt; + GPR_ASSERT(ct->engine); + stream_obj *s = (stream_obj *)gs; + if (op->recv_trailing_metadata) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, + "perform_stream_op - recv_trailing_metadata: on_complete=%p", + op->on_complete); + } + s->recv_trailing_metadata = op->recv_trailing_metadata; + GPR_ASSERT(!s->callback_list[CB_RECV_TRAILING_METADATA][0]); + s->callback_list[CB_RECV_TRAILING_METADATA][0] = op->on_complete; + } + if (op->recv_message) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "perform_stream_op - recv_message: on_complete=%p", + op->on_complete); + } + s->recv_message = (grpc_byte_buffer **)op->recv_message; + GPR_ASSERT(!s->callback_list[CB_RECV_MESSAGE][0]); + GPR_ASSERT(!s->callback_list[CB_RECV_MESSAGE][1]); + s->callback_list[CB_RECV_MESSAGE][0] = op->recv_message_ready; + s->callback_list[CB_RECV_MESSAGE][1] = op->on_complete; + s->read_requested = true; + next_recv_step(s, PERFORM_STREAM_OP); + } + if (op->recv_initial_metadata) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "perform_stream_op - recv_initial_metadata:=%p", + op->on_complete); + } + s->recv_initial_metadata = op->recv_initial_metadata; + GPR_ASSERT(!s->callback_list[CB_RECV_INITIAL_METADATA][0]); + GPR_ASSERT(!s->callback_list[CB_RECV_INITIAL_METADATA][1]); + s->callback_list[CB_RECV_INITIAL_METADATA][0] = + op->recv_initial_metadata_ready; + s->callback_list[CB_RECV_INITIAL_METADATA][1] = op->on_complete; + } + if (op->send_initial_metadata) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, + "perform_stream_op - send_initial_metadata: on_complete=%p", + op->on_complete); + } + s->num_headers = 0; + convert_metadata_to_cronet_headers(op->send_initial_metadata->list.head, + ct->host, s); + s->header_array.count = s->num_headers; + s->header_array.capacity = s->num_headers; + s->header_array.headers = s->headers; + GPR_ASSERT(!s->callback_list[CB_SEND_INITIAL_METADATA][0]); + s->callback_list[CB_SEND_INITIAL_METADATA][0] = op->on_complete; + } + if (op->send_message) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "perform_stream_op - send_message: on_complete=%p", + op->on_complete); + } + grpc_byte_stream_next(exec_ctx, op->send_message, &s->slice, + op->send_message->length, NULL); + // Check that compression flag is not ON. We don't support compression yet. + // TODO (makdharma): add compression support + GPR_ASSERT(op->send_message->flags == 0); + gpr_slice_buffer_add(&s->write_slice_buffer, s->slice); + if (s->cbs == NULL) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "cronet_bidirectional_stream_create"); + } + s->cbs = cronet_bidirectional_stream_create(ct->engine, s, &callbacks); + GPR_ASSERT(s->cbs); + s->read_closed = false; + s->response_trailers_received = false; + s->response_headers_received = false; + s->cronet_send_state = CRONET_SEND_IDLE; + s->cronet_recv_state = CRONET_RECV_IDLE; + } + GPR_ASSERT(!s->callback_list[CB_SEND_MESSAGE][0]); + s->callback_list[CB_SEND_MESSAGE][0] = op->on_complete; + next_send_step(s); + } + if (op->send_trailing_metadata) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, + "perform_stream_op - send_trailing_metadata: on_complete=%p", + op->on_complete); + } + GPR_ASSERT(!s->callback_list[CB_SEND_TRAILING_METADATA][0]); + s->callback_list[CB_SEND_TRAILING_METADATA][0] = op->on_complete; + if (s->cbs) { + // Send an "empty" write to the far end to signal that we're done. + // This will induce the server to send down trailers. + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "W: cronet_bidirectional_stream_write"); + } + cronet_bidirectional_stream_write(s->cbs, "abc", 0, true); + } else { + // We never created a stream. This was probably an empty request. + invoke_closing_callback(s); + } + } +} + +static int init_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt, + grpc_stream *gs, grpc_stream_refcount *refcount, + const void *server_data) { + stream_obj *s = (stream_obj *)gs; + memset(s->callback_list, 0, sizeof(s->callback_list)); + s->cbs = NULL; + gpr_mu_init(&s->recv_mu); + s->read_buffer = gpr_malloc(GRPC_HEADER_SIZE_IN_BYTES); + s->write_buffer = gpr_malloc(GRPC_HEADER_SIZE_IN_BYTES); + gpr_slice_buffer_init(&s->write_slice_buffer); + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "cronet_transport - init_stream"); + } + return 0; +} + +static void destroy_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt, + grpc_stream *gs, void *and_free_memory) { + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "Destroy stream"); + } + stream_obj *s = (stream_obj *)gs; + s->cbs = NULL; + gpr_free(s->read_buffer); + gpr_free(s->write_buffer); + gpr_free(s->url); + gpr_mu_destroy(&s->recv_mu); + if (and_free_memory) { + gpr_free(and_free_memory); + } +} + +static void destroy_transport(grpc_exec_ctx *exec_ctx, grpc_transport *gt) { + grpc_cronet_transport *ct = (grpc_cronet_transport *)gt; + gpr_free(ct->host); + if (grpc_cronet_trace) { + gpr_log(GPR_DEBUG, "Destroy transport"); + } +} + +const grpc_transport_vtable grpc_cronet_vtable = { + sizeof(stream_obj), "cronet_http", init_stream, + set_pollset_do_nothing, perform_stream_op, NULL, + destroy_stream, destroy_transport, NULL}; |