| /* |
| * |
| * 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/iomgr/port.h" |
| |
| #ifdef GRPC_POSIX_SOCKET |
| |
| #include "src/core/lib/iomgr/network_status_tracker.h" |
| #include "src/core/lib/iomgr/tcp_posix.h" |
| |
| #include <errno.h> |
| #include <stdbool.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <grpc/slice.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| #include <grpc/support/sync.h> |
| #include <grpc/support/time.h> |
| |
| #include "src/core/lib/debug/trace.h" |
| #include "src/core/lib/iomgr/ev_posix.h" |
| #include "src/core/lib/profiling/timers.h" |
| #include "src/core/lib/slice/slice_internal.h" |
| #include "src/core/lib/slice/slice_string_helpers.h" |
| #include "src/core/lib/support/string.h" |
| |
| #ifdef GRPC_HAVE_MSG_NOSIGNAL |
| #define SENDMSG_FLAGS MSG_NOSIGNAL |
| #else |
| #define SENDMSG_FLAGS 0 |
| #endif |
| |
| #ifdef GRPC_MSG_IOVLEN_TYPE |
| typedef GRPC_MSG_IOVLEN_TYPE msg_iovlen_type; |
| #else |
| typedef size_t msg_iovlen_type; |
| #endif |
| |
| int grpc_tcp_trace = 0; |
| |
| typedef struct { |
| grpc_endpoint base; |
| grpc_fd *em_fd; |
| int fd; |
| bool finished_edge; |
| msg_iovlen_type iov_size; /* Number of slices to allocate per read attempt */ |
| size_t slice_size; |
| gpr_refcount refcount; |
| gpr_atm shutdown_count; |
| |
| /* garbage after the last read */ |
| grpc_slice_buffer last_read_buffer; |
| |
| grpc_slice_buffer *incoming_buffer; |
| grpc_slice_buffer *outgoing_buffer; |
| /** slice within outgoing_buffer to write next */ |
| size_t outgoing_slice_idx; |
| /** byte within outgoing_buffer->slices[outgoing_slice_idx] to write next */ |
| size_t outgoing_byte_idx; |
| |
| grpc_closure *read_cb; |
| grpc_closure *write_cb; |
| grpc_closure *release_fd_cb; |
| int *release_fd; |
| |
| grpc_closure read_closure; |
| grpc_closure write_closure; |
| |
| char *peer_string; |
| |
| grpc_resource_user *resource_user; |
| grpc_resource_user_slice_allocator slice_allocator; |
| } grpc_tcp; |
| |
| static grpc_error *tcp_annotate_error(grpc_error *src_error, grpc_tcp *tcp) { |
| return grpc_error_set_str( |
| grpc_error_set_int(src_error, GRPC_ERROR_INT_FD, tcp->fd), |
| GRPC_ERROR_STR_TARGET_ADDRESS, |
| grpc_slice_from_copied_string(tcp->peer_string)); |
| } |
| |
| static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */, |
| grpc_error *error); |
| static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */, |
| grpc_error *error); |
| |
| static void tcp_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep, |
| grpc_error *why) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| grpc_fd_shutdown(exec_ctx, tcp->em_fd, why); |
| grpc_resource_user_shutdown(exec_ctx, tcp->resource_user); |
| } |
| |
| static void tcp_free(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) { |
| grpc_fd_orphan(exec_ctx, tcp->em_fd, tcp->release_fd_cb, tcp->release_fd, |
| "tcp_unref_orphan"); |
| grpc_slice_buffer_destroy_internal(exec_ctx, &tcp->last_read_buffer); |
| grpc_resource_user_unref(exec_ctx, tcp->resource_user); |
| gpr_free(tcp->peer_string); |
| gpr_free(tcp); |
| } |
| |
| /*#define GRPC_TCP_REFCOUNT_DEBUG*/ |
| #ifdef GRPC_TCP_REFCOUNT_DEBUG |
| #define TCP_UNREF(cl, tcp, reason) \ |
| tcp_unref((cl), (tcp), (reason), __FILE__, __LINE__) |
| #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__) |
| static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp, |
| const char *reason, const char *file, int line) { |
| gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP unref %p : %s %d -> %d", tcp, |
| reason, tcp->refcount.count, tcp->refcount.count - 1); |
| if (gpr_unref(&tcp->refcount)) { |
| tcp_free(exec_ctx, tcp); |
| } |
| } |
| |
| static void tcp_ref(grpc_tcp *tcp, const char *reason, const char *file, |
| int line) { |
| gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP ref %p : %s %d -> %d", tcp, |
| reason, tcp->refcount.count, tcp->refcount.count + 1); |
| gpr_ref(&tcp->refcount); |
| } |
| #else |
| #define TCP_UNREF(cl, tcp, reason) tcp_unref((cl), (tcp)) |
| #define TCP_REF(tcp, reason) tcp_ref((tcp)) |
| static void tcp_unref(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) { |
| if (gpr_unref(&tcp->refcount)) { |
| tcp_free(exec_ctx, tcp); |
| } |
| } |
| |
| static void tcp_ref(grpc_tcp *tcp) { gpr_ref(&tcp->refcount); } |
| #endif |
| |
| static void tcp_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) { |
| grpc_network_status_unregister_endpoint(ep); |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &tcp->last_read_buffer); |
| TCP_UNREF(exec_ctx, tcp, "destroy"); |
| } |
| |
| static void call_read_cb(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp, |
| grpc_error *error) { |
| grpc_closure *cb = tcp->read_cb; |
| |
| if (grpc_tcp_trace) { |
| size_t i; |
| const char *str = grpc_error_string(error); |
| gpr_log(GPR_DEBUG, "read: error=%s", str); |
| |
| for (i = 0; i < tcp->incoming_buffer->count; i++) { |
| char *dump = grpc_dump_slice(tcp->incoming_buffer->slices[i], |
| GPR_DUMP_HEX | GPR_DUMP_ASCII); |
| gpr_log(GPR_DEBUG, "READ %p (peer=%s): %s", tcp, tcp->peer_string, dump); |
| gpr_free(dump); |
| } |
| } |
| |
| tcp->read_cb = NULL; |
| tcp->incoming_buffer = NULL; |
| grpc_closure_run(exec_ctx, cb, error); |
| } |
| |
| #define MAX_READ_IOVEC 4 |
| static void tcp_do_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) { |
| struct msghdr msg; |
| struct iovec iov[MAX_READ_IOVEC]; |
| ssize_t read_bytes; |
| size_t i; |
| |
| GPR_ASSERT(!tcp->finished_edge); |
| GPR_ASSERT(tcp->iov_size <= MAX_READ_IOVEC); |
| GPR_ASSERT(tcp->incoming_buffer->count <= MAX_READ_IOVEC); |
| GPR_TIMER_BEGIN("tcp_continue_read", 0); |
| |
| for (i = 0; i < tcp->incoming_buffer->count; i++) { |
| iov[i].iov_base = GRPC_SLICE_START_PTR(tcp->incoming_buffer->slices[i]); |
| iov[i].iov_len = GRPC_SLICE_LENGTH(tcp->incoming_buffer->slices[i]); |
| } |
| |
| msg.msg_name = NULL; |
| msg.msg_namelen = 0; |
| msg.msg_iov = iov; |
| msg.msg_iovlen = tcp->iov_size; |
| msg.msg_control = NULL; |
| msg.msg_controllen = 0; |
| msg.msg_flags = 0; |
| |
| GPR_TIMER_BEGIN("recvmsg", 0); |
| do { |
| read_bytes = recvmsg(tcp->fd, &msg, 0); |
| } while (read_bytes < 0 && errno == EINTR); |
| GPR_TIMER_END("recvmsg", read_bytes >= 0); |
| |
| if (read_bytes < 0) { |
| /* NB: After calling call_read_cb a parallel call of the read handler may |
| * be running. */ |
| if (errno == EAGAIN) { |
| if (tcp->iov_size > 1) { |
| tcp->iov_size /= 2; |
| } |
| /* We've consumed the edge, request a new one */ |
| grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_closure); |
| } else { |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, |
| tcp->incoming_buffer); |
| call_read_cb(exec_ctx, tcp, |
| tcp_annotate_error(GRPC_OS_ERROR(errno, "recvmsg"), tcp)); |
| TCP_UNREF(exec_ctx, tcp, "read"); |
| } |
| } else if (read_bytes == 0) { |
| /* 0 read size ==> end of stream */ |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer); |
| call_read_cb( |
| exec_ctx, tcp, |
| tcp_annotate_error( |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Socket closed"), tcp)); |
| TCP_UNREF(exec_ctx, tcp, "read"); |
| } else { |
| GPR_ASSERT((size_t)read_bytes <= tcp->incoming_buffer->length); |
| if ((size_t)read_bytes < tcp->incoming_buffer->length) { |
| grpc_slice_buffer_trim_end( |
| tcp->incoming_buffer, |
| tcp->incoming_buffer->length - (size_t)read_bytes, |
| &tcp->last_read_buffer); |
| } else if (tcp->iov_size < MAX_READ_IOVEC) { |
| ++tcp->iov_size; |
| } |
| GPR_ASSERT((size_t)read_bytes == tcp->incoming_buffer->length); |
| call_read_cb(exec_ctx, tcp, GRPC_ERROR_NONE); |
| TCP_UNREF(exec_ctx, tcp, "read"); |
| } |
| |
| GPR_TIMER_END("tcp_continue_read", 0); |
| } |
| |
| static void tcp_read_allocation_done(grpc_exec_ctx *exec_ctx, void *tcpp, |
| grpc_error *error) { |
| grpc_tcp *tcp = tcpp; |
| if (error != GRPC_ERROR_NONE) { |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer); |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, |
| &tcp->last_read_buffer); |
| call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error)); |
| TCP_UNREF(exec_ctx, tcp, "read"); |
| } else { |
| tcp_do_read(exec_ctx, tcp); |
| } |
| } |
| |
| static void tcp_continue_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) { |
| if (tcp->incoming_buffer->count < (size_t)tcp->iov_size) { |
| grpc_resource_user_alloc_slices( |
| exec_ctx, &tcp->slice_allocator, tcp->slice_size, |
| (size_t)tcp->iov_size - tcp->incoming_buffer->count, |
| tcp->incoming_buffer); |
| } else { |
| tcp_do_read(exec_ctx, tcp); |
| } |
| } |
| |
| static void tcp_handle_read(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */, |
| grpc_error *error) { |
| grpc_tcp *tcp = (grpc_tcp *)arg; |
| GPR_ASSERT(!tcp->finished_edge); |
| |
| if (error != GRPC_ERROR_NONE) { |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer); |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, |
| &tcp->last_read_buffer); |
| call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error)); |
| TCP_UNREF(exec_ctx, tcp, "read"); |
| } else { |
| tcp_continue_read(exec_ctx, tcp); |
| } |
| } |
| |
| static void tcp_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep, |
| grpc_slice_buffer *incoming_buffer, grpc_closure *cb) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| GPR_ASSERT(tcp->read_cb == NULL); |
| tcp->read_cb = cb; |
| tcp->incoming_buffer = incoming_buffer; |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, incoming_buffer); |
| grpc_slice_buffer_swap(incoming_buffer, &tcp->last_read_buffer); |
| TCP_REF(tcp, "read"); |
| if (tcp->finished_edge) { |
| tcp->finished_edge = false; |
| grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_closure); |
| } else { |
| grpc_closure_sched(exec_ctx, &tcp->read_closure, GRPC_ERROR_NONE); |
| } |
| } |
| |
| /* returns true if done, false if pending; if returning true, *error is set */ |
| #define MAX_WRITE_IOVEC 1000 |
| static bool tcp_flush(grpc_tcp *tcp, grpc_error **error) { |
| struct msghdr msg; |
| struct iovec iov[MAX_WRITE_IOVEC]; |
| msg_iovlen_type iov_size; |
| ssize_t sent_length; |
| size_t sending_length; |
| size_t trailing; |
| size_t unwind_slice_idx; |
| size_t unwind_byte_idx; |
| |
| for (;;) { |
| sending_length = 0; |
| unwind_slice_idx = tcp->outgoing_slice_idx; |
| unwind_byte_idx = tcp->outgoing_byte_idx; |
| for (iov_size = 0; tcp->outgoing_slice_idx != tcp->outgoing_buffer->count && |
| iov_size != MAX_WRITE_IOVEC; |
| iov_size++) { |
| iov[iov_size].iov_base = |
| GRPC_SLICE_START_PTR( |
| tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]) + |
| tcp->outgoing_byte_idx; |
| iov[iov_size].iov_len = |
| GRPC_SLICE_LENGTH( |
| tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]) - |
| tcp->outgoing_byte_idx; |
| sending_length += iov[iov_size].iov_len; |
| tcp->outgoing_slice_idx++; |
| tcp->outgoing_byte_idx = 0; |
| } |
| GPR_ASSERT(iov_size > 0); |
| |
| msg.msg_name = NULL; |
| msg.msg_namelen = 0; |
| msg.msg_iov = iov; |
| msg.msg_iovlen = iov_size; |
| msg.msg_control = NULL; |
| msg.msg_controllen = 0; |
| msg.msg_flags = 0; |
| |
| GPR_TIMER_BEGIN("sendmsg", 1); |
| do { |
| /* TODO(klempner): Cork if this is a partial write */ |
| sent_length = sendmsg(tcp->fd, &msg, SENDMSG_FLAGS); |
| } while (sent_length < 0 && errno == EINTR); |
| GPR_TIMER_END("sendmsg", 0); |
| |
| if (sent_length < 0) { |
| if (errno == EAGAIN) { |
| tcp->outgoing_slice_idx = unwind_slice_idx; |
| tcp->outgoing_byte_idx = unwind_byte_idx; |
| return false; |
| } else if (errno == EPIPE) { |
| *error = grpc_error_set_int(GRPC_OS_ERROR(errno, "sendmsg"), |
| GRPC_ERROR_INT_GRPC_STATUS, |
| GRPC_STATUS_UNAVAILABLE); |
| return true; |
| } else { |
| *error = tcp_annotate_error(GRPC_OS_ERROR(errno, "sendmsg"), tcp); |
| return true; |
| } |
| } |
| |
| GPR_ASSERT(tcp->outgoing_byte_idx == 0); |
| trailing = sending_length - (size_t)sent_length; |
| while (trailing > 0) { |
| size_t slice_length; |
| |
| tcp->outgoing_slice_idx--; |
| slice_length = GRPC_SLICE_LENGTH( |
| tcp->outgoing_buffer->slices[tcp->outgoing_slice_idx]); |
| if (slice_length > trailing) { |
| tcp->outgoing_byte_idx = slice_length - trailing; |
| break; |
| } else { |
| trailing -= slice_length; |
| } |
| } |
| |
| if (tcp->outgoing_slice_idx == tcp->outgoing_buffer->count) { |
| *error = GRPC_ERROR_NONE; |
| return true; |
| } |
| }; |
| } |
| |
| static void tcp_handle_write(grpc_exec_ctx *exec_ctx, void *arg /* grpc_tcp */, |
| grpc_error *error) { |
| grpc_tcp *tcp = (grpc_tcp *)arg; |
| grpc_closure *cb; |
| |
| if (error != GRPC_ERROR_NONE) { |
| cb = tcp->write_cb; |
| tcp->write_cb = NULL; |
| cb->cb(exec_ctx, cb->cb_arg, error); |
| TCP_UNREF(exec_ctx, tcp, "write"); |
| return; |
| } |
| |
| if (!tcp_flush(tcp, &error)) { |
| if (grpc_tcp_trace) { |
| gpr_log(GPR_DEBUG, "write: delayed"); |
| } |
| grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_closure); |
| } else { |
| cb = tcp->write_cb; |
| tcp->write_cb = NULL; |
| if (grpc_tcp_trace) { |
| const char *str = grpc_error_string(error); |
| gpr_log(GPR_DEBUG, "write: %s", str); |
| } |
| |
| grpc_closure_run(exec_ctx, cb, error); |
| TCP_UNREF(exec_ctx, tcp, "write"); |
| } |
| } |
| |
| static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep, |
| grpc_slice_buffer *buf, grpc_closure *cb) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| grpc_error *error = GRPC_ERROR_NONE; |
| |
| if (grpc_tcp_trace) { |
| size_t i; |
| |
| for (i = 0; i < buf->count; i++) { |
| char *data = |
| grpc_dump_slice(buf->slices[i], GPR_DUMP_HEX | GPR_DUMP_ASCII); |
| gpr_log(GPR_DEBUG, "WRITE %p (peer=%s): %s", tcp, tcp->peer_string, data); |
| gpr_free(data); |
| } |
| } |
| |
| GPR_TIMER_BEGIN("tcp_write", 0); |
| GPR_ASSERT(tcp->write_cb == NULL); |
| |
| if (buf->length == 0) { |
| GPR_TIMER_END("tcp_write", 0); |
| grpc_closure_sched( |
| exec_ctx, cb, |
| grpc_fd_is_shutdown(tcp->em_fd) |
| ? tcp_annotate_error(GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF"), |
| tcp) |
| : GRPC_ERROR_NONE); |
| return; |
| } |
| tcp->outgoing_buffer = buf; |
| tcp->outgoing_slice_idx = 0; |
| tcp->outgoing_byte_idx = 0; |
| |
| if (!tcp_flush(tcp, &error)) { |
| TCP_REF(tcp, "write"); |
| tcp->write_cb = cb; |
| if (grpc_tcp_trace) { |
| gpr_log(GPR_DEBUG, "write: delayed"); |
| } |
| grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_closure); |
| } else { |
| if (grpc_tcp_trace) { |
| const char *str = grpc_error_string(error); |
| gpr_log(GPR_DEBUG, "write: %s", str); |
| } |
| grpc_closure_sched(exec_ctx, cb, error); |
| } |
| |
| GPR_TIMER_END("tcp_write", 0); |
| } |
| |
| static void tcp_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep, |
| grpc_pollset *pollset) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| grpc_pollset_add_fd(exec_ctx, pollset, tcp->em_fd); |
| } |
| |
| static void tcp_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep, |
| grpc_pollset_set *pollset_set) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| grpc_pollset_set_add_fd(exec_ctx, pollset_set, tcp->em_fd); |
| } |
| |
| static char *tcp_get_peer(grpc_endpoint *ep) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| return gpr_strdup(tcp->peer_string); |
| } |
| |
| static int tcp_get_fd(grpc_endpoint *ep) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| return tcp->fd; |
| } |
| |
| static grpc_workqueue *tcp_get_workqueue(grpc_endpoint *ep) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| return grpc_fd_get_workqueue(tcp->em_fd); |
| } |
| |
| static grpc_resource_user *tcp_get_resource_user(grpc_endpoint *ep) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| return tcp->resource_user; |
| } |
| |
| static const grpc_endpoint_vtable vtable = {tcp_read, |
| tcp_write, |
| tcp_get_workqueue, |
| tcp_add_to_pollset, |
| tcp_add_to_pollset_set, |
| tcp_shutdown, |
| tcp_destroy, |
| tcp_get_resource_user, |
| tcp_get_peer, |
| tcp_get_fd}; |
| |
| grpc_endpoint *grpc_tcp_create(grpc_fd *em_fd, |
| grpc_resource_quota *resource_quota, |
| size_t slice_size, const char *peer_string) { |
| grpc_tcp *tcp = (grpc_tcp *)gpr_malloc(sizeof(grpc_tcp)); |
| tcp->base.vtable = &vtable; |
| tcp->peer_string = gpr_strdup(peer_string); |
| tcp->fd = grpc_fd_wrapped_fd(em_fd); |
| tcp->read_cb = NULL; |
| tcp->write_cb = NULL; |
| tcp->release_fd_cb = NULL; |
| tcp->release_fd = NULL; |
| tcp->incoming_buffer = NULL; |
| tcp->slice_size = slice_size; |
| tcp->iov_size = 1; |
| tcp->finished_edge = true; |
| /* paired with unref in grpc_tcp_destroy */ |
| gpr_ref_init(&tcp->refcount, 1); |
| gpr_atm_no_barrier_store(&tcp->shutdown_count, 0); |
| tcp->em_fd = em_fd; |
| grpc_closure_init(&tcp->read_closure, tcp_handle_read, tcp, |
| grpc_schedule_on_exec_ctx); |
| grpc_closure_init(&tcp->write_closure, tcp_handle_write, tcp, |
| grpc_schedule_on_exec_ctx); |
| grpc_slice_buffer_init(&tcp->last_read_buffer); |
| tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string); |
| grpc_resource_user_slice_allocator_init( |
| &tcp->slice_allocator, tcp->resource_user, tcp_read_allocation_done, tcp); |
| /* Tell network status tracker about new endpoint */ |
| grpc_network_status_register_endpoint(&tcp->base); |
| |
| return &tcp->base; |
| } |
| |
| int grpc_tcp_fd(grpc_endpoint *ep) { |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| GPR_ASSERT(ep->vtable == &vtable); |
| return grpc_fd_wrapped_fd(tcp->em_fd); |
| } |
| |
| void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep, |
| int *fd, grpc_closure *done) { |
| grpc_network_status_unregister_endpoint(ep); |
| grpc_tcp *tcp = (grpc_tcp *)ep; |
| GPR_ASSERT(ep->vtable == &vtable); |
| tcp->release_fd = fd; |
| tcp->release_fd_cb = done; |
| grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &tcp->last_read_buffer); |
| TCP_UNREF(exec_ctx, tcp, "destroy"); |
| } |
| |
| #endif |