static void expect_sockaddr_uri(const char *expected, void *addr) {
char *str;
gpr_log(GPR_INFO, " expect_sockaddr_uri(%s)", expected);
str = grpc_sockaddr_to_uri((struct sockaddr *)addr);
GPR_ASSERT(str != NULL);
GPR_ASSERT(strcmp(expected, str) == 0);
gpr_free(str);
}
static void on_connect(uv_stream_t *server, int status) {
grpc_tcp_listener *sp = (grpc_tcp_listener *)server->data;
uv_tcp_t *client;
grpc_endpoint *ep = NULL;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_resolved_address peer_name;
char *peer_name_string;
int err;
if (status < 0) {
gpr_log(GPR_INFO, "Skipping on_accept due to error: %s",
uv_strerror(status));
return;
}
client = gpr_malloc(sizeof(uv_tcp_t));
uv_tcp_init(uv_default_loop(), client);
// UV documentation says this is guaranteed to succeed
uv_accept((uv_stream_t *)server, (uv_stream_t *)client);
// If the server has not been started, we discard incoming connections
if (sp->server->on_accept_cb == NULL) {
uv_close((uv_handle_t *)client, accepted_connection_close_cb);
} else {
peer_name_string = NULL;
memset(&peer_name, 0, sizeof(grpc_resolved_address));
peer_name.len = sizeof(struct sockaddr_storage);
err = uv_tcp_getpeername(client, (struct sockaddr *)&peer_name.addr,
(int *)&peer_name.len);
if (err == 0) {
peer_name_string = grpc_sockaddr_to_uri(&peer_name);
} else {
gpr_log(GPR_INFO, "uv_tcp_getpeername error: %s", uv_strerror(status));
}
ep = grpc_tcp_create(client, sp->server->resource_quota, peer_name_string);
// 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 = 0;
sp->server->on_accept_cb(&exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
acceptor);
grpc_exec_ctx_finish(&exec_ctx);
}
}
static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
grpc_closure *closure, grpc_endpoint **ep,
grpc_pollset_set *interested_parties,
const grpc_channel_args *channel_args,
const grpc_resolved_address *resolved_addr,
gpr_timespec deadline) {
grpc_uv_tcp_connect *connect;
grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL);
(void)channel_args;
(void)interested_parties;
if (channel_args != NULL) {
for (size_t i = 0; i < channel_args->num_args; i++) {
if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
resource_quota = grpc_resource_quota_ref_internal(
channel_args->args[i].value.pointer.p);
}
}
}
connect = gpr_malloc(sizeof(grpc_uv_tcp_connect));
memset(connect, 0, sizeof(grpc_uv_tcp_connect));
connect->closure = closure;
connect->endpoint = ep;
connect->tcp_handle = gpr_malloc(sizeof(uv_tcp_t));
connect->addr_name = grpc_sockaddr_to_uri(resolved_addr);
connect->resource_quota = resource_quota;
uv_tcp_init(uv_default_loop(), connect->tcp_handle);
connect->connect_req.data = connect;
// TODO(murgatroid99): figure out what the return value here means
uv_tcp_connect(&connect->connect_req, connect->tcp_handle,
(const struct sockaddr *)resolved_addr->addr,
uv_tc_on_connect);
grpc_closure_init(&connect->on_alarm, uv_tc_on_alarm, connect,
grpc_schedule_on_exec_ctx);
grpc_timer_init(exec_ctx, &connect->alarm,
gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
&connect->on_alarm, gpr_now(GPR_CLOCK_MONOTONIC));
}
static void test_sockaddr_to_string(void) {
struct sockaddr_in input4;
struct sockaddr_in6 input6;
struct sockaddr dummy;
gpr_log(GPR_INFO, "%s", "test_sockaddr_to_string");
errno = 0x7EADBEEF;
input4 = make_addr4(kIPv4, sizeof(kIPv4));
expect_sockaddr_str("192.0.2.1:12345", &input4, 0);
expect_sockaddr_str("192.0.2.1:12345", &input4, 1);
expect_sockaddr_uri("ipv4:192.0.2.1:12345", &input4);
input6 = make_addr6(kIPv6, sizeof(kIPv6));
expect_sockaddr_str("[2001:db8::1]:12345", &input6, 0);
expect_sockaddr_str("[2001:db8::1]:12345", &input6, 1);
expect_sockaddr_uri("ipv6:[2001:db8::1]:12345", &input6);
input6 = make_addr6(kMapped, sizeof(kMapped));
expect_sockaddr_str("[::ffff:192.0.2.1]:12345", &input6, 0);
expect_sockaddr_str("192.0.2.1:12345", &input6, 1);
expect_sockaddr_uri("ipv4:192.0.2.1:12345", &input6);
input6 = make_addr6(kNotQuiteMapped, sizeof(kNotQuiteMapped));
expect_sockaddr_str("[::fffe:c000:263]:12345", &input6, 0);
expect_sockaddr_str("[::fffe:c000:263]:12345", &input6, 1);
expect_sockaddr_uri("ipv6:[::fffe:c000:263]:12345", &input6);
memset(&dummy, 0, sizeof(dummy));
dummy.sa_family = 123;
expect_sockaddr_str("(sockaddr family=123)", &dummy, 0);
expect_sockaddr_str("(sockaddr family=123)", &dummy, 1);
GPR_ASSERT(grpc_sockaddr_to_uri(&dummy) == NULL);
GPR_ASSERT(errno == 0x7EADBEEF);
}
/* Tries to issue one async connection, then schedules both an IOCP
notification request for the connection, and one timeout alert. */
void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done,
grpc_endpoint **endpoint,
grpc_pollset_set *interested_parties,
const struct sockaddr *addr, size_t addr_len,
gpr_timespec deadline) {
SOCKET sock = INVALID_SOCKET;
BOOL success;
int status;
struct sockaddr_in6 addr6_v4mapped;
struct sockaddr_in6 local_address;
async_connect *ac;
grpc_winsocket *socket = NULL;
LPFN_CONNECTEX ConnectEx;
GUID guid = WSAID_CONNECTEX;
DWORD ioctl_num_bytes;
const char *message = NULL;
char *utf8_message;
grpc_winsocket_callback_info *info;
*endpoint = NULL;
/* Use dualstack sockets where available. */
if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
addr = (const struct sockaddr *)&addr6_v4mapped;
addr_len = sizeof(addr6_v4mapped);
}
sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
WSA_FLAG_OVERLAPPED);
if (sock == INVALID_SOCKET) {
message = "Unable to create socket: %s";
goto failure;
}
if (!grpc_tcp_prepare_socket(sock)) {
message = "Unable to set socket options: %s";
goto failure;
}
/* Grab the function pointer for ConnectEx for that specific socket.
It may change depending on the interface. */
status =
WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid, sizeof(guid),
&ConnectEx, sizeof(ConnectEx), &ioctl_num_bytes, NULL, NULL);
if (status != 0) {
message = "Unable to retrieve ConnectEx pointer: %s";
goto failure;
}
grpc_sockaddr_make_wildcard6(0, &local_address);
status = bind(sock, (struct sockaddr *)&local_address, sizeof(local_address));
if (status != 0) {
message = "Unable to bind socket: %s";
goto failure;
}
socket = grpc_winsocket_create(sock, "client");
info = &socket->write_info;
success =
ConnectEx(sock, addr, (int)addr_len, NULL, 0, NULL, &info->overlapped);
/* It wouldn't be unusual to get a success immediately. But we'll still get
an IOCP notification, so let's ignore it. */
if (!success) {
int error = WSAGetLastError();
if (error != ERROR_IO_PENDING) {
message = "ConnectEx failed: %s";
goto failure;
}
}
ac = gpr_malloc(sizeof(async_connect));
ac->on_done = on_done;
ac->socket = socket;
gpr_mu_init(&ac->mu);
ac->refs = 2;
ac->addr_name = grpc_sockaddr_to_uri(addr);
ac->endpoint = endpoint;
grpc_closure_init(&ac->on_connect, on_connect, ac);
grpc_timer_init(exec_ctx, &ac->alarm, deadline, on_alarm, ac,
gpr_now(GPR_CLOCK_MONOTONIC));
grpc_socket_notify_on_write(exec_ctx, socket, &ac->on_connect);
return;
failure:
utf8_message = gpr_format_message(WSAGetLastError());
gpr_log(GPR_ERROR, message, utf8_message);
gpr_free(utf8_message);
if (socket != NULL) {
grpc_winsocket_destroy(socket);
} else if (sock != INVALID_SOCKET) {
closesocket(sock);
}
grpc_exec_ctx_enqueue(exec_ctx, on_done, 0);
}
/* Event manager callback when reads are ready. */
static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, bool from_iocp) {
grpc_tcp_listener *sp = arg;
grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index, 0};
SOCKET sock = sp->new_socket;
grpc_winsocket_callback_info *info = &sp->socket->read_info;
grpc_endpoint *ep = NULL;
struct sockaddr_storage peer_name;
char *peer_name_string;
char *fd_name;
int peer_name_len = sizeof(peer_name);
DWORD transfered_bytes;
DWORD flags;
BOOL wsa_success;
int err;
/* The general mechanism for shutting down is to queue abortion calls. While
this is necessary in the read/write case, it's useless for the accept
case. We only need to adjust the pending callback count */
if (!from_iocp) {
return;
}
/* The IOCP notified us of a completed operation. Let's grab the results,
and act accordingly. */
transfered_bytes = 0;
wsa_success = WSAGetOverlappedResult(sock, &info->overlapped,
&transfered_bytes, FALSE, &flags);
if (!wsa_success) {
if (sp->shutting_down) {
/* During the shutdown case, we ARE expecting an error. So that's well,
and we can wake up the shutdown thread. */
decrement_active_ports_and_notify(exec_ctx, sp);
return;
} else {
char *utf8_message = gpr_format_message(WSAGetLastError());
gpr_log(GPR_ERROR, "on_accept error: %s", utf8_message);
gpr_free(utf8_message);
closesocket(sock);
}
} else {
if (!sp->shutting_down) {
peer_name_string = NULL;
err = setsockopt(sock, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
(char *)&sp->socket->socket, sizeof(sp->socket->socket));
if (err) {
char *utf8_message = gpr_format_message(WSAGetLastError());
gpr_log(GPR_ERROR, "setsockopt error: %s", utf8_message);
gpr_free(utf8_message);
}
err = getpeername(sock, (struct sockaddr *)&peer_name, &peer_name_len);
if (!err) {
peer_name_string = grpc_sockaddr_to_uri((struct sockaddr *)&peer_name);
} else {
char *utf8_message = gpr_format_message(WSAGetLastError());
gpr_log(GPR_ERROR, "getpeername error: %s", utf8_message);
gpr_free(utf8_message);
}
gpr_asprintf(&fd_name, "tcp_server:%s", peer_name_string);
ep = grpc_tcp_create(grpc_winsocket_create(sock, fd_name),
peer_name_string);
gpr_free(fd_name);
gpr_free(peer_name_string);
} else {
closesocket(sock);
}
}
/* The only time we should call our callback, is where we successfully
managed to accept a connection, and created an endpoint. */
if (ep)
sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep,
&acceptor);
/* As we were notified from the IOCP of one and exactly one accept,
the former socked we created has now either been destroy or assigned
to the new connection. We need to create a new one for the next
connection. */
start_accept(exec_ctx, sp);
}
/* event manager callback when reads are ready */
static void on_read(grpc_exec_ctx *exec_ctx, void *arg, int success) {
grpc_tcp_listener *sp = arg;
grpc_fd *fdobj;
size_t i;
if (!success) {
goto error;
}
/* loop until accept4 returns EAGAIN, and then re-arm notification */
for (;;) {
struct sockaddr_storage addr;
socklen_t addrlen = sizeof(addr);
char *addr_str;
char *name;
/* 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, (struct sockaddr *)&addr, &addrlen, 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((struct sockaddr *)&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);
}
fdobj = grpc_fd_create(fd, name);
/* TODO(ctiller): revise this when we have server-side sharding
of channels -- we certainly should not be automatically adding every
incoming channel to every pollset owned by the server */
for (i = 0; i < sp->server->pollset_count; i++) {
grpc_pollset_add_fd(exec_ctx, sp->server->pollsets[i], fdobj);
}
sp->server->on_accept_cb(
exec_ctx, sp->server->on_accept_cb_arg,
grpc_tcp_create(fdobj, GRPC_TCP_DEFAULT_READ_SLICE_SIZE, addr_str));
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);
}
}
void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
grpc_endpoint **ep,
grpc_pollset_set *interested_parties,
const struct sockaddr *addr, size_t addr_len,
gpr_timespec deadline) {
int fd;
grpc_dualstack_mode dsmode;
int err;
async_connect *ac;
struct sockaddr_in6 addr6_v4mapped;
struct sockaddr_in addr4_copy;
grpc_fd *fdobj;
char *name;
char *addr_str;
*ep = NULL;
/* Use dualstack sockets where available. */
if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
addr = (const struct sockaddr *)&addr6_v4mapped;
addr_len = sizeof(addr6_v4mapped);
}
fd = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode);
if (fd < 0) {
gpr_log(GPR_ERROR, "Unable to create socket: %s", strerror(errno));
}
if (dsmode == GRPC_DSMODE_IPV4) {
/* If we got an AF_INET socket, map the address back to IPv4. */
GPR_ASSERT(grpc_sockaddr_is_v4mapped(addr, &addr4_copy));
addr = (struct sockaddr *)&addr4_copy;
addr_len = sizeof(addr4_copy);
}
if (!prepare_socket(addr, fd)) {
grpc_exec_ctx_enqueue(exec_ctx, closure, 0);
return;
}
do {
GPR_ASSERT(addr_len < ~(socklen_t)0);
err = connect(fd, addr, (socklen_t)addr_len);
} while (err < 0 && errno == EINTR);
addr_str = grpc_sockaddr_to_uri(addr);
gpr_asprintf(&name, "tcp-client:%s", addr_str);
fdobj = grpc_fd_create(fd, name);
if (err >= 0) {
*ep = grpc_tcp_create(fdobj, GRPC_TCP_DEFAULT_READ_SLICE_SIZE, addr_str);
grpc_exec_ctx_enqueue(exec_ctx, closure, 1);
goto done;
}
if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
gpr_log(GPR_ERROR, "connect error to '%s': %s", addr_str, strerror(errno));
grpc_fd_orphan(exec_ctx, fdobj, NULL, "tcp_client_connect_error");
grpc_exec_ctx_enqueue(exec_ctx, closure, 0);
goto done;
}
grpc_pollset_set_add_fd(exec_ctx, interested_parties, fdobj);
ac = gpr_malloc(sizeof(async_connect));
ac->closure = closure;
ac->ep = ep;
ac->fd = fdobj;
ac->interested_parties = interested_parties;
ac->addr_str = addr_str;
addr_str = NULL;
gpr_mu_init(&ac->mu);
ac->refs = 2;
ac->write_closure.cb = on_writable;
ac->write_closure.cb_arg = ac;
if (grpc_tcp_trace) {
gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: asynchronously connecting",
ac->addr_str);
}
gpr_mu_lock(&ac->mu);
grpc_alarm_init(exec_ctx, &ac->alarm,
gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
tc_on_alarm, ac, gpr_now(GPR_CLOCK_MONOTONIC));
grpc_fd_notify_on_write(exec_ctx, ac->fd, &ac->write_closure);
gpr_mu_unlock(&ac->mu);
done:
gpr_free(name);
gpr_free(addr_str);
}
static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
grpc_closure *closure, grpc_endpoint **ep,
grpc_pollset_set *interested_parties,
const grpc_channel_args *channel_args,
const grpc_resolved_address *addr,
gpr_timespec deadline) {
int fd;
grpc_dualstack_mode dsmode;
int err;
async_connect *ac;
grpc_resolved_address addr6_v4mapped;
grpc_resolved_address addr4_copy;
grpc_fd *fdobj;
char *name;
char *addr_str;
grpc_error *error;
*ep = NULL;
/* Use dualstack sockets where available. */
if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
addr = &addr6_v4mapped;
}
error = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode, &fd);
if (error != GRPC_ERROR_NONE) {
grpc_closure_sched(exec_ctx, closure, error);
return;
}
if (dsmode == GRPC_DSMODE_IPV4) {
/* If we got an AF_INET socket, map the address back to IPv4. */
GPR_ASSERT(grpc_sockaddr_is_v4mapped(addr, &addr4_copy));
addr = &addr4_copy;
}
if ((error = prepare_socket(addr, fd, channel_args)) != GRPC_ERROR_NONE) {
grpc_closure_sched(exec_ctx, closure, error);
return;
}
do {
GPR_ASSERT(addr->len < ~(socklen_t)0);
err =
connect(fd, (const struct sockaddr *)addr->addr, (socklen_t)addr->len);
} while (err < 0 && errno == EINTR);
addr_str = grpc_sockaddr_to_uri(addr);
gpr_asprintf(&name, "tcp-client:%s", addr_str);
fdobj = grpc_fd_create(fd, name);
if (err >= 0) {
*ep =
grpc_tcp_client_create_from_fd(exec_ctx, fdobj, channel_args, addr_str);
grpc_closure_sched(exec_ctx, closure, GRPC_ERROR_NONE);
goto done;
}
if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
grpc_fd_orphan(exec_ctx, fdobj, NULL, NULL, "tcp_client_connect_error");
grpc_closure_sched(exec_ctx, closure, GRPC_OS_ERROR(errno, "connect"));
goto done;
}
grpc_pollset_set_add_fd(exec_ctx, interested_parties, fdobj);
ac = gpr_malloc(sizeof(async_connect));
ac->closure = closure;
ac->ep = ep;
ac->fd = fdobj;
ac->interested_parties = interested_parties;
ac->addr_str = addr_str;
addr_str = NULL;
gpr_mu_init(&ac->mu);
ac->refs = 2;
grpc_closure_init(&ac->write_closure, on_writable, ac,
grpc_schedule_on_exec_ctx);
ac->channel_args = grpc_channel_args_copy(channel_args);
if (grpc_tcp_trace) {
gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: asynchronously connecting",
ac->addr_str);
}
gpr_mu_lock(&ac->mu);
grpc_closure_init(&ac->on_alarm, tc_on_alarm, ac, grpc_schedule_on_exec_ctx);
grpc_timer_init(exec_ctx, &ac->alarm,
gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC),
&ac->on_alarm, gpr_now(GPR_CLOCK_MONOTONIC));
grpc_fd_notify_on_write(exec_ctx, ac->fd, &ac->write_closure);
gpr_mu_unlock(&ac->mu);
done:
gpr_free(name);
gpr_free(addr_str);
}
/* Tries to issue one async connection, then schedules both an IOCP
notification request for the connection, and one timeout alert. */
void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done,
grpc_endpoint **endpoint,
grpc_pollset_set *interested_parties,
const grpc_channel_args *channel_args,
const grpc_resolved_address *addr,
gpr_timespec deadline) {
SOCKET sock = INVALID_SOCKET;
BOOL success;
int status;
grpc_resolved_address addr6_v4mapped;
grpc_resolved_address local_address;
async_connect *ac;
grpc_winsocket *socket = NULL;
LPFN_CONNECTEX ConnectEx;
GUID guid = WSAID_CONNECTEX;
DWORD ioctl_num_bytes;
grpc_winsocket_callback_info *info;
grpc_error *error = GRPC_ERROR_NONE;
grpc_resource_quota *resource_quota = grpc_resource_quota_create(NULL);
if (channel_args != NULL) {
for (size_t i = 0; i < channel_args->num_args; i++) {
if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
resource_quota = grpc_resource_quota_internal_ref(
channel_args->args[i].value.pointer.p);
}
}
}
*endpoint = NULL;
/* Use dualstack sockets where available. */
if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
addr = &addr6_v4mapped;
}
sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
WSA_FLAG_OVERLAPPED);
if (sock == INVALID_SOCKET) {
error = GRPC_WSA_ERROR(WSAGetLastError(), "WSASocket");
goto failure;
}
error = grpc_tcp_prepare_socket(sock);
if (error != GRPC_ERROR_NONE) {
goto failure;
}
/* Grab the function pointer for ConnectEx for that specific socket.
It may change depending on the interface. */
status =
WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid, sizeof(guid),
&ConnectEx, sizeof(ConnectEx), &ioctl_num_bytes, NULL, NULL);
if (status != 0) {
error = GRPC_WSA_ERROR(WSAGetLastError(),
"WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER)");
goto failure;
}
grpc_sockaddr_make_wildcard6(0, &local_address);
status = bind(sock, (struct sockaddr *)&local_address.addr,
(int)local_address.len);
if (status != 0) {
error = GRPC_WSA_ERROR(WSAGetLastError(), "bind");
goto failure;
}
socket = grpc_winsocket_create(sock, "client");
info = &socket->write_info;
success = ConnectEx(sock, (struct sockaddr *)&addr->addr, (int)addr->len,
NULL, 0, NULL, &info->overlapped);
/* It wouldn't be unusual to get a success immediately. But we'll still get
an IOCP notification, so let's ignore it. */
if (!success) {
int last_error = WSAGetLastError();
if (last_error != ERROR_IO_PENDING) {
error = GRPC_WSA_ERROR(last_error, "ConnectEx");
goto failure;
}
}
ac = gpr_malloc(sizeof(async_connect));
ac->on_done = on_done;
ac->socket = socket;
gpr_mu_init(&ac->mu);
ac->refs = 2;
ac->addr_name = grpc_sockaddr_to_uri(addr);
ac->endpoint = endpoint;
ac->resource_quota = resource_quota;
grpc_closure_init(&ac->on_connect, on_connect, ac);
grpc_timer_init(exec_ctx, &ac->alarm, deadline, on_alarm, ac,
gpr_now(GPR_CLOCK_MONOTONIC));
grpc_socket_notify_on_write(exec_ctx, socket, &ac->on_connect);
return;
failure:
GPR_ASSERT(error != GRPC_ERROR_NONE);
char *target_uri = grpc_sockaddr_to_uri(addr);
grpc_error *final_error = grpc_error_set_str(
GRPC_ERROR_CREATE_REFERENCING("Failed to connect", &error, 1),
GRPC_ERROR_STR_TARGET_ADDRESS, target_uri);
GRPC_ERROR_UNREF(error);
if (socket != NULL) {
grpc_winsocket_destroy(socket);
} else if (sock != INVALID_SOCKET) {
closesocket(sock);
}
grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
grpc_exec_ctx_sched(exec_ctx, on_done, final_error, NULL);
}
grpc_error *grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
size_t addr_len, int *out_port) {
grpc_tcp_listener *sp;
grpc_tcp_listener *sp2 = NULL;
int fd;
grpc_dualstack_mode dsmode;
struct sockaddr_in6 addr6_v4mapped;
struct sockaddr_in wild4;
struct sockaddr_in6 wild6;
struct sockaddr_in addr4_copy;
struct sockaddr *allocated_addr = NULL;
struct sockaddr_storage sockname_temp;
socklen_t sockname_len;
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((struct sockaddr *)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_len = sizeof(sockname_temp);
if (0 == getsockname(sp->fd, (struct sockaddr *)&sockname_temp,
&sockname_len)) {
port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
if (port > 0) {
allocated_addr = gpr_malloc(addr_len);
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 = (const struct sockaddr *)&addr6_v4mapped;
addr_len = sizeof(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 = (struct sockaddr *)&wild6;
addr_len = sizeof(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, addr_len, 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((struct sockaddr *)&wild4, sp->port);
}
}
addr = (struct sockaddr *)&wild4;
addr_len = sizeof(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 = (struct sockaddr *)&addr4_copy;
addr_len = sizeof(addr4_copy);
}
sp2 = sp;
errs[1] =
add_socket_to_server(s, fd, addr, addr_len, 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;
}
}
/* 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;
grpc_tcp_server_acceptor acceptor = {sp->server, sp->port_index,
sp->fd_index};
grpc_pollset *read_notifier_pollset = NULL;
grpc_fd *fdobj;
if (err != GRPC_ERROR_NONE) {
goto error;
}
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 (;;) {
struct sockaddr_storage addr;
socklen_t addrlen = sizeof(addr);
char *addr_str;
char *name;
/* 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, (struct sockaddr *)&addr, &addrlen, 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((struct sockaddr *)&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);
}
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, 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);
}
}
