mirror of https://github.com/grpc/grpc.git
Yuchen Zeng
8 years ago
parent
47155ed254
commit
68745bbf8a
23 changed files with 325 additions and 235 deletions
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/*
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* |
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* Copyright 2017, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include "src/core/lib/iomgr/port.h" |
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#ifdef GRPC_HAVE_IFADDRS |
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#include "src/core/lib/iomgr/tcp_server_utils_posix.h" |
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#include <errno.h> |
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#include <limits.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/string_util.h> |
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#include <grpc/support/sync.h> |
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#include "src/core/lib/iomgr/error.h" |
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#include "src/core/lib/iomgr/sockaddr.h" |
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#include "src/core/lib/iomgr/sockaddr_utils.h" |
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#include "src/core/lib/iomgr/unix_sockets_posix.h" |
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#define MIN_SAFE_ACCEPT_QUEUE_SIZE 100 |
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static gpr_once s_init_max_accept_queue_size; |
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static int s_max_accept_queue_size; |
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/* get max listen queue size on linux */ |
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static void init_max_accept_queue_size(void) { |
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int n = SOMAXCONN; |
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char buf[64]; |
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FILE *fp = fopen("/proc/sys/net/core/somaxconn", "r"); |
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if (fp == NULL) { |
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/* 2.4 kernel. */ |
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s_max_accept_queue_size = SOMAXCONN; |
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return; |
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} |
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if (fgets(buf, sizeof buf, fp)) { |
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char *end; |
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long i = strtol(buf, &end, 10); |
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if (i > 0 && i <= INT_MAX && end && *end == 0) { |
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n = (int)i; |
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} |
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} |
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fclose(fp); |
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s_max_accept_queue_size = n; |
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if (s_max_accept_queue_size < MIN_SAFE_ACCEPT_QUEUE_SIZE) { |
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gpr_log(GPR_INFO, |
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"Suspiciously small accept queue (%d) will probably lead to " |
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"connection drops", |
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s_max_accept_queue_size); |
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} |
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} |
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static int get_max_accept_queue_size(void) { |
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gpr_once_init(&s_init_max_accept_queue_size, init_max_accept_queue_size); |
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return s_max_accept_queue_size; |
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} |
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static grpc_error *add_socket_to_server(grpc_tcp_server *s, int fd, |
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const grpc_resolved_address *addr, |
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unsigned port_index, unsigned fd_index, |
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grpc_tcp_listener **listener) { |
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grpc_tcp_listener *sp = NULL; |
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int port = -1; |
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char *addr_str; |
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char *name; |
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grpc_error *err = |
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grpc_tcp_server_prepare_socket(fd, addr, s->so_reuseport, &port); |
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if (err == GRPC_ERROR_NONE) { |
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GPR_ASSERT(port > 0); |
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grpc_sockaddr_to_string(&addr_str, addr, 1); |
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gpr_asprintf(&name, "tcp-server-listener:%s", addr_str); |
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gpr_mu_lock(&s->mu); |
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s->nports++; |
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GPR_ASSERT(!s->on_accept_cb && "must add ports before starting server"); |
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sp = gpr_malloc(sizeof(grpc_tcp_listener)); |
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sp->next = NULL; |
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if (s->head == NULL) { |
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s->head = sp; |
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} else { |
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s->tail->next = sp; |
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} |
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s->tail = sp; |
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sp->server = s; |
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sp->fd = fd; |
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sp->emfd = grpc_fd_create(fd, name); |
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memcpy(&sp->addr, addr, sizeof(grpc_resolved_address)); |
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sp->port = port; |
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sp->port_index = port_index; |
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sp->fd_index = fd_index; |
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sp->is_sibling = 0; |
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sp->sibling = NULL; |
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GPR_ASSERT(sp->emfd); |
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gpr_mu_unlock(&s->mu); |
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gpr_free(addr_str); |
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gpr_free(name); |
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} |
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*listener = sp; |
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return err; |
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} |
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/* If successful, add a listener to s for addr, set *dsmode for the socket, and
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return the *listener. */ |
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grpc_error *grpc_tcp_server_add_addr(grpc_tcp_server *s, |
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const grpc_resolved_address *addr, |
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unsigned port_index, unsigned fd_index, |
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grpc_dualstack_mode *dsmode, |
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grpc_tcp_listener **listener) { |
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grpc_resolved_address addr4_copy; |
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int fd; |
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grpc_error *err = |
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grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, dsmode, &fd); |
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if (err != GRPC_ERROR_NONE) { |
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return err; |
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} |
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if (*dsmode == GRPC_DSMODE_IPV4 && |
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grpc_sockaddr_is_v4mapped(addr, &addr4_copy)) { |
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addr = &addr4_copy; |
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} |
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return add_socket_to_server(s, fd, addr, port_index, fd_index, listener); |
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} |
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/* Prepare a recently-created socket for listening. */ |
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grpc_error *grpc_tcp_server_prepare_socket(int fd, |
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const grpc_resolved_address *addr, |
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bool so_reuseport, int *port) { |
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grpc_resolved_address sockname_temp; |
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grpc_error *err = GRPC_ERROR_NONE; |
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GPR_ASSERT(fd >= 0); |
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if (so_reuseport && !grpc_is_unix_socket(addr)) { |
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err = grpc_set_socket_reuse_port(fd, 1); |
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if (err != GRPC_ERROR_NONE) goto error; |
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} |
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err = grpc_set_socket_nonblocking(fd, 1); |
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if (err != GRPC_ERROR_NONE) goto error; |
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err = grpc_set_socket_cloexec(fd, 1); |
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if (err != GRPC_ERROR_NONE) goto error; |
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if (!grpc_is_unix_socket(addr)) { |
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err = grpc_set_socket_low_latency(fd, 1); |
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if (err != GRPC_ERROR_NONE) goto error; |
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err = grpc_set_socket_reuse_addr(fd, 1); |
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if (err != GRPC_ERROR_NONE) goto error; |
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} |
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err = grpc_set_socket_no_sigpipe_if_possible(fd); |
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if (err != GRPC_ERROR_NONE) goto error; |
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GPR_ASSERT(addr->len < ~(socklen_t)0); |
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if (bind(fd, (struct sockaddr *)addr->addr, (socklen_t)addr->len) < 0) { |
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err = GRPC_OS_ERROR(errno, "bind"); |
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goto error; |
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} |
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if (listen(fd, get_max_accept_queue_size()) < 0) { |
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err = GRPC_OS_ERROR(errno, "listen"); |
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goto error; |
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} |
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sockname_temp.len = sizeof(struct sockaddr_storage); |
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if (getsockname(fd, (struct sockaddr *)sockname_temp.addr, |
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(socklen_t *)&sockname_temp.len) < 0) { |
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err = GRPC_OS_ERROR(errno, "getsockname"); |
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goto error; |
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} |
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*port = grpc_sockaddr_get_port(&sockname_temp); |
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return GRPC_ERROR_NONE; |
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error: |
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GPR_ASSERT(err != GRPC_ERROR_NONE); |
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if (fd >= 0) { |
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close(fd); |
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} |
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grpc_error *ret = grpc_error_set_int( |
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GRPC_ERROR_CREATE_REFERENCING("Unable to configure socket", &err, 1), |
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GRPC_ERROR_INT_FD, fd); |
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GRPC_ERROR_UNREF(err); |
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return ret; |
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} |
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#endif /* GRPC_HAVE_IFADDRS */ |
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