| /* |
| * |
| * 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. |
| * |
| */ |
| |
| /* FIXME: "posix" files shouldn't be depending on _GNU_SOURCE */ |
| #ifndef _GNU_SOURCE |
| #define _GNU_SOURCE |
| #endif |
| |
| #include "src/core/lib/iomgr/port.h" |
| |
| #ifdef GRPC_POSIX_SOCKET |
| |
| #include "src/core/lib/iomgr/tcp_server.h" |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| #include <netinet/in.h> |
| #include <netinet/tcp.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.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 <grpc/support/useful.h> |
| |
| #include "src/core/lib/iomgr/resolve_address.h" |
| #include "src/core/lib/iomgr/sockaddr.h" |
| #include "src/core/lib/iomgr/sockaddr_utils.h" |
| #include "src/core/lib/iomgr/socket_utils_posix.h" |
| #include "src/core/lib/iomgr/tcp_posix.h" |
| #include "src/core/lib/iomgr/unix_sockets_posix.h" |
| #include "src/core/lib/support/string.h" |
| |
| #define MIN_SAFE_ACCEPT_QUEUE_SIZE 100 |
| |
| static gpr_once s_init_max_accept_queue_size; |
| static int s_max_accept_queue_size; |
| |
| /* one listening port */ |
| typedef struct grpc_tcp_listener grpc_tcp_listener; |
| struct grpc_tcp_listener { |
| int fd; |
| grpc_fd *emfd; |
| grpc_tcp_server *server; |
| grpc_resolved_address addr; |
| int port; |
| unsigned port_index; |
| unsigned fd_index; |
| grpc_closure read_closure; |
| grpc_closure destroyed_closure; |
| struct grpc_tcp_listener *next; |
| /* sibling is a linked list of all listeners for a given port. add_port and |
| clone_port place all new listeners in the same sibling list. A member of |
| the 'sibling' list is also a member of the 'next' list. The head of each |
| sibling list has is_sibling==0, and subsequent members of sibling lists |
| have is_sibling==1. is_sibling allows separate sibling lists to be |
| identified while iterating through 'next'. */ |
| struct grpc_tcp_listener *sibling; |
| int is_sibling; |
| }; |
| |
| /* the overall server */ |
| struct grpc_tcp_server { |
| gpr_refcount refs; |
| /* Called whenever accept() succeeds on a server port. */ |
| grpc_tcp_server_cb on_accept_cb; |
| void *on_accept_cb_arg; |
| |
| gpr_mu mu; |
| |
| /* active port count: how many ports are actually still listening */ |
| size_t active_ports; |
| /* destroyed port count: how many ports are completely destroyed */ |
| size_t destroyed_ports; |
| |
| /* is this server shutting down? */ |
| bool shutdown; |
| /* use SO_REUSEPORT */ |
| bool so_reuseport; |
| |
| /* linked list of server ports */ |
| grpc_tcp_listener *head; |
| grpc_tcp_listener *tail; |
| unsigned nports; |
| |
| /* List of closures passed to shutdown_starting_add(). */ |
| grpc_closure_list shutdown_starting; |
| |
| /* shutdown callback */ |
| grpc_closure *shutdown_complete; |
| |
| /* all pollsets interested in new connections */ |
| grpc_pollset **pollsets; |
| /* number of pollsets in the pollsets array */ |
| size_t pollset_count; |
| |
| /* next pollset to assign a channel to */ |
| gpr_atm next_pollset_to_assign; |
| |
| grpc_resource_quota *resource_quota; |
| }; |
| |
| static gpr_once check_init = GPR_ONCE_INIT; |
| static bool has_so_reuseport = false; |
| |
| static void init(void) { |
| #ifndef GPR_MANYLINUX1 |
| int s = socket(AF_INET, SOCK_STREAM, 0); |
| if (s >= 0) { |
| has_so_reuseport = GRPC_LOG_IF_ERROR("check for SO_REUSEPORT", |
| grpc_set_socket_reuse_port(s, 1)); |
| close(s); |
| } |
| #endif |
| } |
| |
| grpc_error *grpc_tcp_server_create(grpc_exec_ctx *exec_ctx, |
| grpc_closure *shutdown_complete, |
| const grpc_channel_args *args, |
| grpc_tcp_server **server) { |
| gpr_once_init(&check_init, init); |
| |
| grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server)); |
| s->so_reuseport = has_so_reuseport; |
| s->resource_quota = grpc_resource_quota_create(NULL); |
| for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) { |
| if (0 == strcmp(GRPC_ARG_ALLOW_REUSEPORT, args->args[i].key)) { |
| if (args->args[i].type == GRPC_ARG_INTEGER) { |
| s->so_reuseport = |
| has_so_reuseport && (args->args[i].value.integer != 0); |
| } else { |
| grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota); |
| gpr_free(s); |
| return GRPC_ERROR_CREATE(GRPC_ARG_ALLOW_REUSEPORT |
| " must be an integer"); |
| } |
| } else if (0 == strcmp(GRPC_ARG_RESOURCE_QUOTA, args->args[i].key)) { |
| if (args->args[i].type == GRPC_ARG_POINTER) { |
| grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota); |
| s->resource_quota = |
| grpc_resource_quota_internal_ref(args->args[i].value.pointer.p); |
| } else { |
| grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota); |
| gpr_free(s); |
| return GRPC_ERROR_CREATE(GRPC_ARG_RESOURCE_QUOTA |
| " must be a pointer to a buffer pool"); |
| } |
| } |
| } |
| gpr_ref_init(&s->refs, 1); |
| gpr_mu_init(&s->mu); |
| s->active_ports = 0; |
| s->destroyed_ports = 0; |
| s->shutdown = false; |
| s->shutdown_starting.head = NULL; |
| s->shutdown_starting.tail = NULL; |
| s->shutdown_complete = shutdown_complete; |
| s->on_accept_cb = NULL; |
| s->on_accept_cb_arg = NULL; |
| s->head = NULL; |
| s->tail = NULL; |
| s->nports = 0; |
| gpr_atm_no_barrier_store(&s->next_pollset_to_assign, 0); |
| *server = s; |
| return GRPC_ERROR_NONE; |
| } |
| |
| static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) { |
| gpr_mu_lock(&s->mu); |
| GPR_ASSERT(s->shutdown); |
| gpr_mu_unlock(&s->mu); |
| if (s->shutdown_complete != NULL) { |
| grpc_exec_ctx_sched(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE, NULL); |
| } |
| |
| gpr_mu_destroy(&s->mu); |
| |
| while (s->head) { |
| grpc_tcp_listener *sp = s->head; |
| s->head = sp->next; |
| gpr_free(sp); |
| } |
| |
| grpc_resource_quota_internal_unref(exec_ctx, s->resource_quota); |
| |
| gpr_free(s); |
| } |
| |
| static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server, |
| grpc_error *error) { |
| grpc_tcp_server *s = server; |
| gpr_mu_lock(&s->mu); |
| s->destroyed_ports++; |
| if (s->destroyed_ports == s->nports) { |
| gpr_mu_unlock(&s->mu); |
| finish_shutdown(exec_ctx, s); |
| } else { |
| GPR_ASSERT(s->destroyed_ports < s->nports); |
| gpr_mu_unlock(&s->mu); |
| } |
| } |
| |
| /* called when all listening endpoints have been shutdown, so no further |
| events will be received on them - at this point it's safe to destroy |
| things */ |
| static void deactivated_all_ports(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) { |
| /* delete ALL the things */ |
| gpr_mu_lock(&s->mu); |
| |
| if (!s->shutdown) { |
| gpr_mu_unlock(&s->mu); |
| return; |
| } |
| |
| if (s->head) { |
| grpc_tcp_listener *sp; |
| for (sp = s->head; sp; sp = sp->next) { |
| grpc_unlink_if_unix_domain_socket(&sp->addr); |
| sp->destroyed_closure.cb = destroyed_port; |
| sp->destroyed_closure.cb_arg = s; |
| grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, NULL, |
| "tcp_listener_shutdown"); |
| } |
| gpr_mu_unlock(&s->mu); |
| } else { |
| gpr_mu_unlock(&s->mu); |
| finish_shutdown(exec_ctx, s); |
| } |
| } |
| |
| static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) { |
| gpr_mu_lock(&s->mu); |
| |
| GPR_ASSERT(!s->shutdown); |
| s->shutdown = true; |
| |
| /* shutdown all fd's */ |
| if (s->active_ports) { |
| grpc_tcp_listener *sp; |
| for (sp = s->head; sp; sp = sp->next) { |
| grpc_fd_shutdown(exec_ctx, sp->emfd); |
| } |
| gpr_mu_unlock(&s->mu); |
| } else { |
| gpr_mu_unlock(&s->mu); |
| deactivated_all_ports(exec_ctx, s); |
| } |
| } |
| |
| /* get max listen queue size on linux */ |
| static void init_max_accept_queue_size(void) { |
| int n = SOMAXCONN; |
| char buf[64]; |
| FILE *fp = fopen("/proc/sys/net/core/somaxconn", "r"); |
| if (fp == NULL) { |
| /* 2.4 kernel. */ |
| s_max_accept_queue_size = SOMAXCONN; |
| return; |
| } |
| if (fgets(buf, sizeof buf, fp)) { |
| char *end; |
| long i = strtol(buf, &end, 10); |
| if (i > 0 && i <= INT_MAX && end && *end == 0) { |
| n = (int)i; |
| } |
| } |
| fclose(fp); |
| s_max_accept_queue_size = n; |
| |
| if (s_max_accept_queue_size < MIN_SAFE_ACCEPT_QUEUE_SIZE) { |
| gpr_log(GPR_INFO, |
| "Suspiciously small accept queue (%d) will probably lead to " |
| "connection drops", |
| s_max_accept_queue_size); |
| } |
| } |
| |
| static int get_max_accept_queue_size(void) { |
| gpr_once_init(&s_init_max_accept_queue_size, init_max_accept_queue_size); |
| return s_max_accept_queue_size; |
| } |
| |
| /* Prepare a recently-created socket for listening. */ |
| static grpc_error *prepare_socket(int fd, const grpc_resolved_address *addr, |
| bool so_reuseport, int *port) { |
| grpc_resolved_address sockname_temp; |
| grpc_error *err = GRPC_ERROR_NONE; |
| |
| GPR_ASSERT(fd >= 0); |
| |
| if (so_reuseport && !grpc_is_unix_socket(addr)) { |
| err = grpc_set_socket_reuse_port(fd, 1); |
| if (err != GRPC_ERROR_NONE) goto error; |
| } |
| |
| err = grpc_set_socket_nonblocking(fd, 1); |
| if (err != GRPC_ERROR_NONE) goto error; |
| err = grpc_set_socket_cloexec(fd, 1); |
| if (err != GRPC_ERROR_NONE) goto error; |
| if (!grpc_is_unix_socket(addr)) { |
| err = grpc_set_socket_low_latency(fd, 1); |
| if (err != GRPC_ERROR_NONE) goto error; |
| err = grpc_set_socket_reuse_addr(fd, 1); |
| if (err != GRPC_ERROR_NONE) goto error; |
| } |
| err = grpc_set_socket_no_sigpipe_if_possible(fd); |
| if (err != GRPC_ERROR_NONE) goto error; |
| |
| GPR_ASSERT(addr->len < ~(socklen_t)0); |
| if (bind(fd, (struct sockaddr *)addr->addr, (socklen_t)addr->len) < 0) { |
| err = GRPC_OS_ERROR(errno, "bind"); |
| goto error; |
| } |
| |
| if (listen(fd, get_max_accept_queue_size()) < 0) { |
| err = GRPC_OS_ERROR(errno, "listen"); |
| goto error; |
| } |
| |
| sockname_temp.len = sizeof(struct sockaddr_storage); |
| |
| if (getsockname(fd, (struct sockaddr *)sockname_temp.addr, |
| (socklen_t *)&sockname_temp.len) < 0) { |
| err = GRPC_OS_ERROR(errno, "getsockname"); |
| goto error; |
| } |
| |
| *port = grpc_sockaddr_get_port(&sockname_temp); |
| return GRPC_ERROR_NONE; |
| |
| error: |
| GPR_ASSERT(err != GRPC_ERROR_NONE); |
| if (fd >= 0) { |
| close(fd); |
| } |
| grpc_error *ret = grpc_error_set_int( |
| GRPC_ERROR_CREATE_REFERENCING("Unable to configure socket", &err, 1), |
| GRPC_ERROR_INT_FD, fd); |
| GRPC_ERROR_UNREF(err); |
| return ret; |
| } |
| |
| /* event manager callback when reads are ready */ |
| static void on_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *err) { |
| grpc_tcp_listener *sp = arg; |
| |
| if (err != GRPC_ERROR_NONE) { |
| goto error; |
| } |
| |
| // Create acceptor. |
| grpc_tcp_server_acceptor *acceptor = gpr_malloc(sizeof(*acceptor)); |
| acceptor->from_server = sp->server; |
| acceptor->port_index = sp->port_index; |
| acceptor->fd_index = sp->fd_index; |
| |
| grpc_pollset *read_notifier_pollset = |
| sp->server->pollsets[(size_t)gpr_atm_no_barrier_fetch_add( |
| &sp->server->next_pollset_to_assign, 1) % |
| sp->server->pollset_count]; |
| |
| /* loop until accept4 returns EAGAIN, and then re-arm notification */ |
| for (;;) { |
| grpc_resolved_address addr; |
| char *addr_str; |
| char *name; |
| addr.len = sizeof(struct sockaddr_storage); |
| /* Note: If we ever decide to return this address to the user, remember to |
| strip off the ::ffff:0.0.0.0/96 prefix first. */ |
| int fd = grpc_accept4(sp->fd, &addr, 1, 1); |
| if (fd < 0) { |
| switch (errno) { |
| case EINTR: |
| continue; |
| case EAGAIN: |
| grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure); |
| return; |
| default: |
| gpr_log(GPR_ERROR, "Failed accept4: %s", strerror(errno)); |
| goto error; |
| } |
| } |
| |
| grpc_set_socket_no_sigpipe_if_possible(fd); |
| |
| addr_str = grpc_sockaddr_to_uri(&addr); |
| gpr_asprintf(&name, "tcp-server-connection:%s", addr_str); |
| |
| if (grpc_tcp_trace) { |
| gpr_log(GPR_DEBUG, "SERVER_CONNECT: incoming connection: %s", addr_str); |
| } |
| |
| grpc_fd *fdobj = grpc_fd_create(fd, name); |
| |
| if (read_notifier_pollset == NULL) { |
| gpr_log(GPR_ERROR, "Read notifier pollset is not set on the fd"); |
| goto error; |
| } |
| |
| grpc_pollset_add_fd(exec_ctx, read_notifier_pollset, fdobj); |
| |
| sp->server->on_accept_cb( |
| exec_ctx, sp->server->on_accept_cb_arg, |
| grpc_tcp_create(fdobj, sp->server->resource_quota, |
| GRPC_TCP_DEFAULT_READ_SLICE_SIZE, addr_str), |
| read_notifier_pollset, acceptor); |
| |
| gpr_free(name); |
| gpr_free(addr_str); |
| } |
| |
| GPR_UNREACHABLE_CODE(return ); |
| |
| error: |
| gpr_mu_lock(&sp->server->mu); |
| if (0 == --sp->server->active_ports) { |
| gpr_mu_unlock(&sp->server->mu); |
| deactivated_all_ports(exec_ctx, sp->server); |
| } else { |
| gpr_mu_unlock(&sp->server->mu); |
| } |
| } |
| |
| static grpc_error *add_socket_to_server(grpc_tcp_server *s, int fd, |
| const grpc_resolved_address *addr, |
| unsigned port_index, unsigned fd_index, |
| grpc_tcp_listener **listener) { |
| grpc_tcp_listener *sp = NULL; |
| int port = -1; |
| char *addr_str; |
| char *name; |
| |
| grpc_error *err = prepare_socket(fd, addr, s->so_reuseport, &port); |
| if (err == GRPC_ERROR_NONE) { |
| GPR_ASSERT(port > 0); |
| grpc_sockaddr_to_string(&addr_str, addr, 1); |
| gpr_asprintf(&name, "tcp-server-listener:%s", addr_str); |
| gpr_mu_lock(&s->mu); |
| s->nports++; |
| GPR_ASSERT(!s->on_accept_cb && "must add ports before starting server"); |
| sp = gpr_malloc(sizeof(grpc_tcp_listener)); |
| sp->next = NULL; |
| if (s->head == NULL) { |
| s->head = sp; |
| } else { |
| s->tail->next = sp; |
| } |
| s->tail = sp; |
| sp->server = s; |
| sp->fd = fd; |
| sp->emfd = grpc_fd_create(fd, name); |
| memcpy(&sp->addr, addr, sizeof(grpc_resolved_address)); |
| sp->port = port; |
| sp->port_index = port_index; |
| sp->fd_index = fd_index; |
| sp->is_sibling = 0; |
| sp->sibling = NULL; |
| GPR_ASSERT(sp->emfd); |
| gpr_mu_unlock(&s->mu); |
| gpr_free(addr_str); |
| gpr_free(name); |
| } |
| |
| *listener = sp; |
| return err; |
| } |
| |
| /* Insert count new listeners after listener. Every new listener will have the |
| same listen address as listener (SO_REUSEPORT must be enabled). Every new |
| listener is a sibling of listener. */ |
| static grpc_error *clone_port(grpc_tcp_listener *listener, unsigned count) { |
| grpc_tcp_listener *sp = NULL; |
| char *addr_str; |
| char *name; |
| grpc_error *err; |
| |
| for (grpc_tcp_listener *l = listener->next; l && l->is_sibling; l = l->next) { |
| l->fd_index += count; |
| } |
| |
| for (unsigned i = 0; i < count; i++) { |
| int fd = -1; |
| int port = -1; |
| grpc_dualstack_mode dsmode; |
| err = grpc_create_dualstack_socket(&listener->addr, SOCK_STREAM, 0, &dsmode, |
| &fd); |
| if (err != GRPC_ERROR_NONE) return err; |
| err = prepare_socket(fd, &listener->addr, true, &port); |
| if (err != GRPC_ERROR_NONE) return err; |
| listener->server->nports++; |
| grpc_sockaddr_to_string(&addr_str, &listener->addr, 1); |
| gpr_asprintf(&name, "tcp-server-listener:%s/clone-%d", addr_str, i); |
| sp = gpr_malloc(sizeof(grpc_tcp_listener)); |
| sp->next = listener->next; |
| listener->next = sp; |
| /* sp (the new listener) is a sibling of 'listener' (the original |
| listener). */ |
| sp->is_sibling = 1; |
| sp->sibling = listener->sibling; |
| listener->sibling = sp; |
| sp->server = listener->server; |
| sp->fd = fd; |
| sp->emfd = grpc_fd_create(fd, name); |
| memcpy(&sp->addr, &listener->addr, sizeof(grpc_resolved_address)); |
| sp->port = port; |
| sp->port_index = listener->port_index; |
| sp->fd_index = listener->fd_index + count - i; |
| GPR_ASSERT(sp->emfd); |
| while (listener->server->tail->next != NULL) { |
| listener->server->tail = listener->server->tail->next; |
| } |
| gpr_free(addr_str); |
| gpr_free(name); |
| } |
| |
| return GRPC_ERROR_NONE; |
| } |
| |
| grpc_error *grpc_tcp_server_add_port(grpc_tcp_server *s, |
| const grpc_resolved_address *addr, |
| int *out_port) { |
| grpc_tcp_listener *sp; |
| grpc_tcp_listener *sp2 = NULL; |
| int fd; |
| grpc_dualstack_mode dsmode; |
| grpc_resolved_address addr6_v4mapped; |
| grpc_resolved_address wild4; |
| grpc_resolved_address wild6; |
| grpc_resolved_address addr4_copy; |
| grpc_resolved_address *allocated_addr = NULL; |
| grpc_resolved_address sockname_temp; |
| int port; |
| unsigned port_index = 0; |
| unsigned fd_index = 0; |
| grpc_error *errs[2] = {GRPC_ERROR_NONE, GRPC_ERROR_NONE}; |
| if (s->tail != NULL) { |
| port_index = s->tail->port_index + 1; |
| } |
| grpc_unlink_if_unix_domain_socket(addr); |
| |
| /* Check if this is a wildcard port, and if so, try to keep the port the same |
| as some previously created listener. */ |
| if (grpc_sockaddr_get_port(addr) == 0) { |
| for (sp = s->head; sp; sp = sp->next) { |
| sockname_temp.len = sizeof(struct sockaddr_storage); |
| if (0 == getsockname(sp->fd, (struct sockaddr *)sockname_temp.addr, |
| (socklen_t *)&sockname_temp.len)) { |
| port = grpc_sockaddr_get_port(&sockname_temp); |
| if (port > 0) { |
| allocated_addr = gpr_malloc(sizeof(grpc_resolved_address)); |
| memcpy(allocated_addr, addr, addr->len); |
| grpc_sockaddr_set_port(allocated_addr, port); |
| addr = allocated_addr; |
| break; |
| } |
| } |
| } |
| } |
| |
| sp = NULL; |
| |
| if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) { |
| addr = &addr6_v4mapped; |
| } |
| |
| /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */ |
| if (grpc_sockaddr_is_wildcard(addr, &port)) { |
| grpc_sockaddr_make_wildcards(port, &wild4, &wild6); |
| |
| /* Try listening on IPv6 first. */ |
| addr = &wild6; |
| errs[0] = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode, &fd); |
| if (errs[0] == GRPC_ERROR_NONE) { |
| errs[0] = add_socket_to_server(s, fd, addr, port_index, fd_index, &sp); |
| if (fd >= 0 && dsmode == GRPC_DSMODE_DUALSTACK) { |
| goto done; |
| } |
| if (sp != NULL) { |
| ++fd_index; |
| } |
| /* If we didn't get a dualstack socket, also listen on 0.0.0.0. */ |
| if (port == 0 && sp != NULL) { |
| grpc_sockaddr_set_port(&wild4, sp->port); |
| } |
| } |
| addr = &wild4; |
| } |
| |
| errs[1] = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode, &fd); |
| if (errs[1] == GRPC_ERROR_NONE) { |
| if (dsmode == GRPC_DSMODE_IPV4 && |
| grpc_sockaddr_is_v4mapped(addr, &addr4_copy)) { |
| addr = &addr4_copy; |
| } |
| sp2 = sp; |
| errs[1] = add_socket_to_server(s, fd, addr, port_index, fd_index, &sp); |
| if (sp2 != NULL && sp != NULL) { |
| sp2->sibling = sp; |
| sp->is_sibling = 1; |
| } |
| } |
| |
| done: |
| gpr_free(allocated_addr); |
| if (sp != NULL) { |
| *out_port = sp->port; |
| GRPC_ERROR_UNREF(errs[0]); |
| GRPC_ERROR_UNREF(errs[1]); |
| return GRPC_ERROR_NONE; |
| } else { |
| *out_port = -1; |
| char *addr_str = grpc_sockaddr_to_uri(addr); |
| grpc_error *err = grpc_error_set_str( |
| GRPC_ERROR_CREATE_REFERENCING("Failed to add port to server", errs, |
| GPR_ARRAY_SIZE(errs)), |
| GRPC_ERROR_STR_TARGET_ADDRESS, addr_str); |
| GRPC_ERROR_UNREF(errs[0]); |
| GRPC_ERROR_UNREF(errs[1]); |
| gpr_free(addr_str); |
| return err; |
| } |
| } |
| |
| /* Return listener at port_index or NULL. Should only be called with s->mu |
| locked. */ |
| static grpc_tcp_listener *get_port_index(grpc_tcp_server *s, |
| unsigned port_index) { |
| unsigned num_ports = 0; |
| grpc_tcp_listener *sp; |
| for (sp = s->head; sp; sp = sp->next) { |
| if (!sp->is_sibling) { |
| if (++num_ports > port_index) { |
| return sp; |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| unsigned grpc_tcp_server_port_fd_count(grpc_tcp_server *s, |
| unsigned port_index) { |
| unsigned num_fds = 0; |
| gpr_mu_lock(&s->mu); |
| grpc_tcp_listener *sp = get_port_index(s, port_index); |
| for (; sp; sp = sp->sibling) { |
| ++num_fds; |
| } |
| gpr_mu_unlock(&s->mu); |
| return num_fds; |
| } |
| |
| int grpc_tcp_server_port_fd(grpc_tcp_server *s, unsigned port_index, |
| unsigned fd_index) { |
| gpr_mu_lock(&s->mu); |
| grpc_tcp_listener *sp = get_port_index(s, port_index); |
| for (; sp; sp = sp->sibling, --fd_index) { |
| if (fd_index == 0) { |
| gpr_mu_unlock(&s->mu); |
| return sp->fd; |
| } |
| } |
| gpr_mu_unlock(&s->mu); |
| return -1; |
| } |
| |
| void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s, |
| grpc_pollset **pollsets, size_t pollset_count, |
| grpc_tcp_server_cb on_accept_cb, |
| void *on_accept_cb_arg) { |
| size_t i; |
| grpc_tcp_listener *sp; |
| GPR_ASSERT(on_accept_cb); |
| gpr_mu_lock(&s->mu); |
| GPR_ASSERT(!s->on_accept_cb); |
| GPR_ASSERT(s->active_ports == 0); |
| s->on_accept_cb = on_accept_cb; |
| s->on_accept_cb_arg = on_accept_cb_arg; |
| s->pollsets = pollsets; |
| s->pollset_count = pollset_count; |
| sp = s->head; |
| while (sp != NULL) { |
| if (s->so_reuseport && !grpc_is_unix_socket(&sp->addr) && |
| pollset_count > 1) { |
| GPR_ASSERT(GRPC_LOG_IF_ERROR( |
| "clone_port", clone_port(sp, (unsigned)(pollset_count - 1)))); |
| for (i = 0; i < pollset_count; i++) { |
| grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd); |
| sp->read_closure.cb = on_read; |
| sp->read_closure.cb_arg = sp; |
| grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure); |
| s->active_ports++; |
| sp = sp->next; |
| } |
| } else { |
| for (i = 0; i < pollset_count; i++) { |
| grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd); |
| } |
| sp->read_closure.cb = on_read; |
| sp->read_closure.cb_arg = sp; |
| grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure); |
| s->active_ports++; |
| sp = sp->next; |
| } |
| } |
| gpr_mu_unlock(&s->mu); |
| } |
| |
| grpc_tcp_server *grpc_tcp_server_ref(grpc_tcp_server *s) { |
| gpr_ref_non_zero(&s->refs); |
| return s; |
| } |
| |
| void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s, |
| grpc_closure *shutdown_starting) { |
| gpr_mu_lock(&s->mu); |
| grpc_closure_list_append(&s->shutdown_starting, shutdown_starting, |
| GRPC_ERROR_NONE); |
| gpr_mu_unlock(&s->mu); |
| } |
| |
| void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) { |
| if (gpr_unref(&s->refs)) { |
| grpc_tcp_server_shutdown_listeners(exec_ctx, s); |
| gpr_mu_lock(&s->mu); |
| grpc_exec_ctx_enqueue_list(exec_ctx, &s->shutdown_starting, NULL); |
| gpr_mu_unlock(&s->mu); |
| tcp_server_destroy(exec_ctx, s); |
| } |
| } |
| |
| void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx *exec_ctx, |
| grpc_tcp_server *s) { |
| gpr_mu_lock(&s->mu); |
| /* shutdown all fd's */ |
| if (s->active_ports) { |
| grpc_tcp_listener *sp; |
| for (sp = s->head; sp; sp = sp->next) { |
| grpc_fd_shutdown(exec_ctx, sp->emfd); |
| } |
| } |
| gpr_mu_unlock(&s->mu); |
| } |
| |
| #endif |