swayfx/sway/ipc-server.c
Antonin Décimo 8033b575f7 ipc: fix aligment issue of data buffer
The pointer `data` is cast to a more strictly aligned pointer type. To
prevent issues, the `data32` buffer is removed and its occurrences are
replaced with an offset from the `data` buffer.
2020-07-30 22:02:42 -04:00

962 lines
30 KiB
C

// See https://i3wm.org/docs/ipc.html for protocol information
#define _POSIX_C_SOURCE 200112L
#include <linux/input-event-codes.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <json.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/un.h>
#include <unistd.h>
#include <wayland-server-core.h>
#include "sway/commands.h"
#include "sway/config.h"
#include "sway/desktop/transaction.h"
#include "sway/ipc-json.h"
#include "sway/ipc-server.h"
#include "sway/output.h"
#include "sway/server.h"
#include "sway/input/input-manager.h"
#include "sway/input/keyboard.h"
#include "sway/input/seat.h"
#include "sway/tree/root.h"
#include "sway/tree/view.h"
#include "sway/tree/workspace.h"
#include "list.h"
#include "log.h"
#include "util.h"
static int ipc_socket = -1;
static struct wl_event_source *ipc_event_source = NULL;
static struct sockaddr_un *ipc_sockaddr = NULL;
static list_t *ipc_client_list = NULL;
static struct wl_listener ipc_display_destroy;
static const char ipc_magic[] = {'i', '3', '-', 'i', 'p', 'c'};
#define IPC_HEADER_SIZE (sizeof(ipc_magic) + 8)
struct ipc_client {
struct wl_event_source *event_source;
struct wl_event_source *writable_event_source;
struct sway_server *server;
int fd;
enum ipc_command_type subscribed_events;
size_t write_buffer_len;
size_t write_buffer_size;
char *write_buffer;
// The following are for storing data between event_loop calls
uint32_t pending_length;
enum ipc_command_type pending_type;
};
struct sockaddr_un *ipc_user_sockaddr(void);
int ipc_handle_connection(int fd, uint32_t mask, void *data);
int ipc_client_handle_readable(int client_fd, uint32_t mask, void *data);
int ipc_client_handle_writable(int client_fd, uint32_t mask, void *data);
void ipc_client_disconnect(struct ipc_client *client);
void ipc_client_handle_command(struct ipc_client *client, uint32_t payload_length,
enum ipc_command_type payload_type);
bool ipc_send_reply(struct ipc_client *client, enum ipc_command_type payload_type,
const char *payload, uint32_t payload_length);
static void handle_display_destroy(struct wl_listener *listener, void *data) {
if (ipc_event_source) {
wl_event_source_remove(ipc_event_source);
}
close(ipc_socket);
unlink(ipc_sockaddr->sun_path);
while (ipc_client_list->length) {
ipc_client_disconnect(ipc_client_list->items[ipc_client_list->length-1]);
}
list_free(ipc_client_list);
free(ipc_sockaddr);
wl_list_remove(&ipc_display_destroy.link);
}
void ipc_init(struct sway_server *server) {
ipc_socket = socket(AF_UNIX, SOCK_STREAM, 0);
if (ipc_socket == -1) {
sway_abort("Unable to create IPC socket");
}
if (fcntl(ipc_socket, F_SETFD, FD_CLOEXEC) == -1) {
sway_abort("Unable to set CLOEXEC on IPC socket");
}
if (fcntl(ipc_socket, F_SETFL, O_NONBLOCK) == -1) {
sway_abort("Unable to set NONBLOCK on IPC socket");
}
ipc_sockaddr = ipc_user_sockaddr();
// We want to use socket name set by user, not existing socket from another sway instance.
if (getenv("SWAYSOCK") != NULL && access(getenv("SWAYSOCK"), F_OK) == -1) {
strncpy(ipc_sockaddr->sun_path, getenv("SWAYSOCK"), sizeof(ipc_sockaddr->sun_path) - 1);
ipc_sockaddr->sun_path[sizeof(ipc_sockaddr->sun_path) - 1] = 0;
}
unlink(ipc_sockaddr->sun_path);
if (bind(ipc_socket, (struct sockaddr *)ipc_sockaddr, sizeof(*ipc_sockaddr)) == -1) {
sway_abort("Unable to bind IPC socket");
}
if (listen(ipc_socket, 3) == -1) {
sway_abort("Unable to listen on IPC socket");
}
// Set i3 IPC socket path so that i3-msg works out of the box
setenv("I3SOCK", ipc_sockaddr->sun_path, 1);
setenv("SWAYSOCK", ipc_sockaddr->sun_path, 1);
ipc_client_list = create_list();
ipc_display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(server->wl_display, &ipc_display_destroy);
ipc_event_source = wl_event_loop_add_fd(server->wl_event_loop, ipc_socket,
WL_EVENT_READABLE, ipc_handle_connection, server);
}
struct sockaddr_un *ipc_user_sockaddr(void) {
struct sockaddr_un *ipc_sockaddr = malloc(sizeof(struct sockaddr_un));
if (ipc_sockaddr == NULL) {
sway_abort("Can't allocate ipc_sockaddr");
}
ipc_sockaddr->sun_family = AF_UNIX;
int path_size = sizeof(ipc_sockaddr->sun_path);
// Env var typically set by logind, e.g. "/run/user/<user-id>"
const char *dir = getenv("XDG_RUNTIME_DIR");
if (!dir) {
dir = "/tmp";
}
if (path_size <= snprintf(ipc_sockaddr->sun_path, path_size,
"%s/sway-ipc.%i.%i.sock", dir, getuid(), getpid())) {
sway_abort("Socket path won't fit into ipc_sockaddr->sun_path");
}
return ipc_sockaddr;
}
int ipc_handle_connection(int fd, uint32_t mask, void *data) {
(void) fd;
struct sway_server *server = data;
sway_log(SWAY_DEBUG, "Event on IPC listening socket");
assert(mask == WL_EVENT_READABLE);
int client_fd = accept(ipc_socket, NULL, NULL);
if (client_fd == -1) {
sway_log_errno(SWAY_ERROR, "Unable to accept IPC client connection");
return 0;
}
int flags;
if ((flags = fcntl(client_fd, F_GETFD)) == -1
|| fcntl(client_fd, F_SETFD, flags|FD_CLOEXEC) == -1) {
sway_log_errno(SWAY_ERROR, "Unable to set CLOEXEC on IPC client socket");
close(client_fd);
return 0;
}
if ((flags = fcntl(client_fd, F_GETFL)) == -1
|| fcntl(client_fd, F_SETFL, flags|O_NONBLOCK) == -1) {
sway_log_errno(SWAY_ERROR, "Unable to set NONBLOCK on IPC client socket");
close(client_fd);
return 0;
}
struct ipc_client *client = malloc(sizeof(struct ipc_client));
if (!client) {
sway_log(SWAY_ERROR, "Unable to allocate ipc client");
close(client_fd);
return 0;
}
client->server = server;
client->pending_length = 0;
client->fd = client_fd;
client->subscribed_events = 0;
client->event_source = wl_event_loop_add_fd(server->wl_event_loop,
client_fd, WL_EVENT_READABLE, ipc_client_handle_readable, client);
client->writable_event_source = NULL;
client->write_buffer_size = 128;
client->write_buffer_len = 0;
client->write_buffer = malloc(client->write_buffer_size);
if (!client->write_buffer) {
sway_log(SWAY_ERROR, "Unable to allocate ipc client write buffer");
close(client_fd);
return 0;
}
sway_log(SWAY_DEBUG, "New client: fd %d", client_fd);
list_add(ipc_client_list, client);
return 0;
}
int ipc_client_handle_readable(int client_fd, uint32_t mask, void *data) {
struct ipc_client *client = data;
if (mask & WL_EVENT_ERROR) {
sway_log(SWAY_ERROR, "IPC Client socket error, removing client");
ipc_client_disconnect(client);
return 0;
}
if (mask & WL_EVENT_HANGUP) {
sway_log(SWAY_DEBUG, "Client %d hung up", client->fd);
ipc_client_disconnect(client);
return 0;
}
sway_log(SWAY_DEBUG, "Client %d readable", client->fd);
int read_available;
if (ioctl(client_fd, FIONREAD, &read_available) == -1) {
sway_log_errno(SWAY_INFO, "Unable to read IPC socket buffer size");
ipc_client_disconnect(client);
return 0;
}
// Wait for the rest of the command payload in case the header has already been read
if (client->pending_length > 0) {
if ((uint32_t)read_available >= client->pending_length) {
// Reset pending values.
uint32_t pending_length = client->pending_length;
enum ipc_command_type pending_type = client->pending_type;
client->pending_length = 0;
ipc_client_handle_command(client, pending_length, pending_type);
}
return 0;
}
if (read_available < (int) IPC_HEADER_SIZE) {
return 0;
}
uint8_t buf[IPC_HEADER_SIZE];
// Should be fully available, because read_available >= IPC_HEADER_SIZE
ssize_t received = recv(client_fd, buf, IPC_HEADER_SIZE, 0);
if (received == -1) {
sway_log_errno(SWAY_INFO, "Unable to receive header from IPC client");
ipc_client_disconnect(client);
return 0;
}
if (memcmp(buf, ipc_magic, sizeof(ipc_magic)) != 0) {
sway_log(SWAY_DEBUG, "IPC header check failed");
ipc_client_disconnect(client);
return 0;
}
memcpy(&client->pending_length, buf + sizeof(ipc_magic), sizeof(uint32_t));
memcpy(&client->pending_type, buf + sizeof(ipc_magic) + sizeof(uint32_t), sizeof(uint32_t));
if (read_available - received >= (long)client->pending_length) {
// Reset pending values.
uint32_t pending_length = client->pending_length;
enum ipc_command_type pending_type = client->pending_type;
client->pending_length = 0;
ipc_client_handle_command(client, pending_length, pending_type);
}
return 0;
}
static bool ipc_has_event_listeners(enum ipc_command_type event) {
for (int i = 0; i < ipc_client_list->length; i++) {
struct ipc_client *client = ipc_client_list->items[i];
if ((client->subscribed_events & event_mask(event)) != 0) {
return true;
}
}
return false;
}
static void ipc_send_event(const char *json_string, enum ipc_command_type event) {
struct ipc_client *client;
for (int i = 0; i < ipc_client_list->length; i++) {
client = ipc_client_list->items[i];
if ((client->subscribed_events & event_mask(event)) == 0) {
continue;
}
if (!ipc_send_reply(client, event, json_string,
(uint32_t)strlen(json_string))) {
sway_log_errno(SWAY_INFO, "Unable to send reply to IPC client");
/* ipc_send_reply destroys client on error, which also
* removes it from the list, so we need to process
* current index again */
i--;
}
}
}
void ipc_event_workspace(struct sway_workspace *old,
struct sway_workspace *new, const char *change) {
if (!ipc_has_event_listeners(IPC_EVENT_WORKSPACE)) {
return;
}
sway_log(SWAY_DEBUG, "Sending workspace::%s event", change);
json_object *obj = json_object_new_object();
json_object_object_add(obj, "change", json_object_new_string(change));
if (old) {
json_object_object_add(obj, "old",
ipc_json_describe_node_recursive(&old->node));
} else {
json_object_object_add(obj, "old", NULL);
}
if (new) {
json_object_object_add(obj, "current",
ipc_json_describe_node_recursive(&new->node));
} else {
json_object_object_add(obj, "current", NULL);
}
const char *json_string = json_object_to_json_string(obj);
ipc_send_event(json_string, IPC_EVENT_WORKSPACE);
json_object_put(obj);
}
void ipc_event_window(struct sway_container *window, const char *change) {
if (!ipc_has_event_listeners(IPC_EVENT_WINDOW)) {
return;
}
sway_log(SWAY_DEBUG, "Sending window::%s event", change);
json_object *obj = json_object_new_object();
json_object_object_add(obj, "change", json_object_new_string(change));
json_object_object_add(obj, "container",
ipc_json_describe_node_recursive(&window->node));
const char *json_string = json_object_to_json_string(obj);
ipc_send_event(json_string, IPC_EVENT_WINDOW);
json_object_put(obj);
}
void ipc_event_barconfig_update(struct bar_config *bar) {
if (!ipc_has_event_listeners(IPC_EVENT_BARCONFIG_UPDATE)) {
return;
}
sway_log(SWAY_DEBUG, "Sending barconfig_update event");
json_object *json = ipc_json_describe_bar_config(bar);
const char *json_string = json_object_to_json_string(json);
ipc_send_event(json_string, IPC_EVENT_BARCONFIG_UPDATE);
json_object_put(json);
}
void ipc_event_bar_state_update(struct bar_config *bar) {
if (!ipc_has_event_listeners(IPC_EVENT_BAR_STATE_UPDATE)) {
return;
}
sway_log(SWAY_DEBUG, "Sending bar_state_update event");
json_object *json = json_object_new_object();
json_object_object_add(json, "id", json_object_new_string(bar->id));
json_object_object_add(json, "visible_by_modifier",
json_object_new_boolean(bar->visible_by_modifier));
const char *json_string = json_object_to_json_string(json);
ipc_send_event(json_string, IPC_EVENT_BAR_STATE_UPDATE);
json_object_put(json);
}
void ipc_event_mode(const char *mode, bool pango) {
if (!ipc_has_event_listeners(IPC_EVENT_MODE)) {
return;
}
sway_log(SWAY_DEBUG, "Sending mode::%s event", mode);
json_object *obj = json_object_new_object();
json_object_object_add(obj, "change", json_object_new_string(mode));
json_object_object_add(obj, "pango_markup",
json_object_new_boolean(pango));
const char *json_string = json_object_to_json_string(obj);
ipc_send_event(json_string, IPC_EVENT_MODE);
json_object_put(obj);
}
void ipc_event_shutdown(const char *reason) {
if (!ipc_has_event_listeners(IPC_EVENT_SHUTDOWN)) {
return;
}
sway_log(SWAY_DEBUG, "Sending shutdown::%s event", reason);
json_object *json = json_object_new_object();
json_object_object_add(json, "change", json_object_new_string(reason));
const char *json_string = json_object_to_json_string(json);
ipc_send_event(json_string, IPC_EVENT_SHUTDOWN);
json_object_put(json);
}
void ipc_event_binding(struct sway_binding *binding) {
if (!ipc_has_event_listeners(IPC_EVENT_BINDING)) {
return;
}
sway_log(SWAY_DEBUG, "Sending binding event");
json_object *json_binding = json_object_new_object();
json_object_object_add(json_binding, "command", json_object_new_string(binding->command));
const char *names[10];
int len = get_modifier_names(names, binding->modifiers);
json_object *modifiers = json_object_new_array();
for (int i = 0; i < len; ++i) {
json_object_array_add(modifiers, json_object_new_string(names[i]));
}
json_object_object_add(json_binding, "event_state_mask", modifiers);
json_object *input_codes = json_object_new_array();
int input_code = 0;
json_object *symbols = json_object_new_array();
json_object *symbol = NULL;
switch (binding->type) {
case BINDING_KEYCODE:; // bindcode: populate input_codes
uint32_t keycode;
for (int i = 0; i < binding->keys->length; ++i) {
keycode = *(uint32_t *)binding->keys->items[i];
json_object_array_add(input_codes, json_object_new_int(keycode));
if (i == 0) {
input_code = keycode;
}
}
break;
case BINDING_KEYSYM:
case BINDING_MOUSESYM:
case BINDING_MOUSECODE:; // bindsym/mouse: populate symbols
uint32_t keysym;
char buffer[64];
for (int i = 0; i < binding->keys->length; ++i) {
keysym = *(uint32_t *)binding->keys->items[i];
if (keysym >= BTN_LEFT && keysym <= BTN_LEFT + 8) {
snprintf(buffer, 64, "button%u", keysym - BTN_LEFT + 1);
} else if (xkb_keysym_get_name(keysym, buffer, 64) < 0) {
continue;
}
json_object *str = json_object_new_string(buffer);
if (i == 0) {
// str is owned by both symbol and symbols. Make sure
// to bump the ref count.
json_object_array_add(symbols, json_object_get(str));
symbol = str;
} else {
json_object_array_add(symbols, str);
}
}
break;
default:
sway_log(SWAY_DEBUG, "Unsupported ipc binding event");
json_object_put(input_codes);
json_object_put(symbols);
json_object_put(json_binding);
return; // do not send any event
}
json_object_object_add(json_binding, "input_codes", input_codes);
json_object_object_add(json_binding, "input_code", json_object_new_int(input_code));
json_object_object_add(json_binding, "symbols", symbols);
json_object_object_add(json_binding, "symbol", symbol);
bool mouse = binding->type == BINDING_MOUSECODE ||
binding->type == BINDING_MOUSESYM;
json_object_object_add(json_binding, "input_type", mouse
? json_object_new_string("mouse")
: json_object_new_string("keyboard"));
json_object *json = json_object_new_object();
json_object_object_add(json, "change", json_object_new_string("run"));
json_object_object_add(json, "binding", json_binding);
const char *json_string = json_object_to_json_string(json);
ipc_send_event(json_string, IPC_EVENT_BINDING);
json_object_put(json);
}
static void ipc_event_tick(const char *payload) {
if (!ipc_has_event_listeners(IPC_EVENT_TICK)) {
return;
}
sway_log(SWAY_DEBUG, "Sending tick event");
json_object *json = json_object_new_object();
json_object_object_add(json, "first", json_object_new_boolean(false));
json_object_object_add(json, "payload", json_object_new_string(payload));
const char *json_string = json_object_to_json_string(json);
ipc_send_event(json_string, IPC_EVENT_TICK);
json_object_put(json);
}
void ipc_event_input(const char *change, struct sway_input_device *device) {
if (!ipc_has_event_listeners(IPC_EVENT_INPUT)) {
return;
}
sway_log(SWAY_DEBUG, "Sending input event");
json_object *json = json_object_new_object();
json_object_object_add(json, "change", json_object_new_string(change));
json_object_object_add(json, "input", ipc_json_describe_input(device));
const char *json_string = json_object_to_json_string(json);
ipc_send_event(json_string, IPC_EVENT_INPUT);
json_object_put(json);
}
int ipc_client_handle_writable(int client_fd, uint32_t mask, void *data) {
struct ipc_client *client = data;
if (mask & WL_EVENT_ERROR) {
sway_log(SWAY_ERROR, "IPC Client socket error, removing client");
ipc_client_disconnect(client);
return 0;
}
if (mask & WL_EVENT_HANGUP) {
sway_log(SWAY_DEBUG, "Client %d hung up", client->fd);
ipc_client_disconnect(client);
return 0;
}
if (client->write_buffer_len <= 0) {
return 0;
}
sway_log(SWAY_DEBUG, "Client %d writable", client->fd);
ssize_t written = write(client->fd, client->write_buffer, client->write_buffer_len);
if (written == -1 && errno == EAGAIN) {
return 0;
} else if (written == -1) {
sway_log_errno(SWAY_INFO, "Unable to send data from queue to IPC client");
ipc_client_disconnect(client);
return 0;
}
memmove(client->write_buffer, client->write_buffer + written, client->write_buffer_len - written);
client->write_buffer_len -= written;
if (client->write_buffer_len == 0 && client->writable_event_source) {
wl_event_source_remove(client->writable_event_source);
client->writable_event_source = NULL;
}
return 0;
}
void ipc_client_disconnect(struct ipc_client *client) {
if (!sway_assert(client != NULL, "client != NULL")) {
return;
}
shutdown(client->fd, SHUT_RDWR);
sway_log(SWAY_INFO, "IPC Client %d disconnected", client->fd);
wl_event_source_remove(client->event_source);
if (client->writable_event_source) {
wl_event_source_remove(client->writable_event_source);
}
int i = 0;
while (i < ipc_client_list->length && ipc_client_list->items[i] != client) {
i++;
}
list_del(ipc_client_list, i);
free(client->write_buffer);
close(client->fd);
free(client);
}
static void ipc_get_workspaces_callback(struct sway_workspace *workspace,
void *data) {
json_object *workspace_json = ipc_json_describe_node(&workspace->node);
// override the default focused indicator because
// it's set differently for the get_workspaces reply
struct sway_seat *seat = input_manager_get_default_seat();
struct sway_workspace *focused_ws = seat_get_focused_workspace(seat);
bool focused = workspace == focused_ws;
json_object_object_del(workspace_json, "focused");
json_object_object_add(workspace_json, "focused",
json_object_new_boolean(focused));
json_object_array_add((json_object *)data, workspace_json);
focused_ws = output_get_active_workspace(workspace->output);
bool visible = workspace == focused_ws;
json_object_object_add(workspace_json, "visible",
json_object_new_boolean(visible));
}
static void ipc_get_marks_callback(struct sway_container *con, void *data) {
json_object *marks = (json_object *)data;
for (int i = 0; i < con->marks->length; ++i) {
char *mark = (char *)con->marks->items[i];
json_object_array_add(marks, json_object_new_string(mark));
}
}
void ipc_client_handle_command(struct ipc_client *client, uint32_t payload_length,
enum ipc_command_type payload_type) {
if (!sway_assert(client != NULL, "client != NULL")) {
return;
}
char *buf = malloc(payload_length + 1);
if (!buf) {
sway_log_errno(SWAY_INFO, "Unable to allocate IPC payload");
ipc_client_disconnect(client);
return;
}
if (payload_length > 0) {
// Payload should be fully available
ssize_t received = recv(client->fd, buf, payload_length, 0);
if (received == -1)
{
sway_log_errno(SWAY_INFO, "Unable to receive payload from IPC client");
ipc_client_disconnect(client);
free(buf);
return;
}
}
buf[payload_length] = '\0';
switch (payload_type) {
case IPC_COMMAND:
{
char *line = strtok(buf, "\n");
while (line) {
size_t line_length = strlen(line);
if (line + line_length >= buf + payload_length) {
break;
}
line[line_length] = ';';
line = strtok(NULL, "\n");
}
list_t *res_list = execute_command(buf, NULL, NULL);
transaction_commit_dirty();
char *json = cmd_results_to_json(res_list);
int length = strlen(json);
ipc_send_reply(client, payload_type, json, (uint32_t)length);
free(json);
while (res_list->length) {
struct cmd_results *results = res_list->items[0];
free_cmd_results(results);
list_del(res_list, 0);
}
list_free(res_list);
goto exit_cleanup;
}
case IPC_SEND_TICK:
{
ipc_event_tick(buf);
ipc_send_reply(client, payload_type, "{\"success\": true}", 17);
goto exit_cleanup;
}
case IPC_GET_OUTPUTS:
{
json_object *outputs = json_object_new_array();
for (int i = 0; i < root->outputs->length; ++i) {
struct sway_output *output = root->outputs->items[i];
json_object *output_json = ipc_json_describe_node(&output->node);
// override the default focused indicator because it's set
// differently for the get_outputs reply
struct sway_seat *seat = input_manager_get_default_seat();
struct sway_workspace *focused_ws =
seat_get_focused_workspace(seat);
bool focused = focused_ws && output == focused_ws->output;
json_object_object_del(output_json, "focused");
json_object_object_add(output_json, "focused",
json_object_new_boolean(focused));
const char *subpixel = sway_wl_output_subpixel_to_string(output->wlr_output->subpixel);
json_object_object_add(output_json, "subpixel_hinting", json_object_new_string(subpixel));
json_object_array_add(outputs, output_json);
}
struct sway_output *output;
wl_list_for_each(output, &root->all_outputs, link) {
if (!output->enabled && output != root->noop_output) {
json_object_array_add(outputs,
ipc_json_describe_disabled_output(output));
}
}
const char *json_string = json_object_to_json_string(outputs);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(outputs); // free
goto exit_cleanup;
}
case IPC_GET_WORKSPACES:
{
json_object *workspaces = json_object_new_array();
root_for_each_workspace(ipc_get_workspaces_callback, workspaces);
const char *json_string = json_object_to_json_string(workspaces);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(workspaces); // free
goto exit_cleanup;
}
case IPC_SUBSCRIBE:
{
// TODO: Check if they're permitted to use these events
struct json_object *request = json_tokener_parse(buf);
if (request == NULL || !json_object_is_type(request, json_type_array)) {
const char msg[] = "{\"success\": false}";
ipc_send_reply(client, payload_type, msg, strlen(msg));
sway_log(SWAY_INFO, "Failed to parse subscribe request");
goto exit_cleanup;
}
bool is_tick = false;
// parse requested event types
for (size_t i = 0; i < json_object_array_length(request); i++) {
const char *event_type = json_object_get_string(json_object_array_get_idx(request, i));
if (strcmp(event_type, "workspace") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_WORKSPACE);
} else if (strcmp(event_type, "barconfig_update") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_BARCONFIG_UPDATE);
} else if (strcmp(event_type, "bar_state_update") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_BAR_STATE_UPDATE);
} else if (strcmp(event_type, "mode") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_MODE);
} else if (strcmp(event_type, "shutdown") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_SHUTDOWN);
} else if (strcmp(event_type, "window") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_WINDOW);
} else if (strcmp(event_type, "binding") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_BINDING);
} else if (strcmp(event_type, "tick") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_TICK);
is_tick = true;
} else if (strcmp(event_type, "input") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_INPUT);
} else {
const char msg[] = "{\"success\": false}";
ipc_send_reply(client, payload_type, msg, strlen(msg));
json_object_put(request);
sway_log(SWAY_INFO, "Unsupported event type in subscribe request");
goto exit_cleanup;
}
}
json_object_put(request);
const char msg[] = "{\"success\": true}";
ipc_send_reply(client, payload_type, msg, strlen(msg));
if (is_tick) {
const char tickmsg[] = "{\"first\": true, \"payload\": \"\"}";
ipc_send_reply(client, IPC_EVENT_TICK, tickmsg,
strlen(tickmsg));
}
goto exit_cleanup;
}
case IPC_GET_INPUTS:
{
json_object *inputs = json_object_new_array();
struct sway_input_device *device = NULL;
wl_list_for_each(device, &server.input->devices, link) {
json_object_array_add(inputs, ipc_json_describe_input(device));
}
const char *json_string = json_object_to_json_string(inputs);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(inputs); // free
goto exit_cleanup;
}
case IPC_GET_SEATS:
{
json_object *seats = json_object_new_array();
struct sway_seat *seat = NULL;
wl_list_for_each(seat, &server.input->seats, link) {
json_object_array_add(seats, ipc_json_describe_seat(seat));
}
const char *json_string = json_object_to_json_string(seats);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(seats); // free
goto exit_cleanup;
}
case IPC_GET_TREE:
{
json_object *tree = ipc_json_describe_node_recursive(&root->node);
const char *json_string = json_object_to_json_string(tree);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(tree);
goto exit_cleanup;
}
case IPC_GET_MARKS:
{
json_object *marks = json_object_new_array();
root_for_each_container(ipc_get_marks_callback, marks);
const char *json_string = json_object_to_json_string(marks);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(marks);
goto exit_cleanup;
}
case IPC_GET_VERSION:
{
json_object *version = ipc_json_get_version();
const char *json_string = json_object_to_json_string(version);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(version); // free
goto exit_cleanup;
}
case IPC_GET_BAR_CONFIG:
{
if (!buf[0]) {
// Send list of configured bar IDs
json_object *bars = json_object_new_array();
for (int i = 0; i < config->bars->length; ++i) {
struct bar_config *bar = config->bars->items[i];
json_object_array_add(bars, json_object_new_string(bar->id));
}
const char *json_string = json_object_to_json_string(bars);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(bars); // free
} else {
// Send particular bar's details
struct bar_config *bar = NULL;
for (int i = 0; i < config->bars->length; ++i) {
bar = config->bars->items[i];
if (strcmp(buf, bar->id) == 0) {
break;
}
bar = NULL;
}
if (!bar) {
const char *error = "{ \"success\": false, \"error\": \"No bar with that ID\" }";
ipc_send_reply(client, payload_type, error,
(uint32_t)strlen(error));
goto exit_cleanup;
}
json_object *json = ipc_json_describe_bar_config(bar);
const char *json_string = json_object_to_json_string(json);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(json); // free
}
goto exit_cleanup;
}
case IPC_GET_BINDING_MODES:
{
json_object *modes = json_object_new_array();
for (int i = 0; i < config->modes->length; i++) {
struct sway_mode *mode = config->modes->items[i];
json_object_array_add(modes, json_object_new_string(mode->name));
}
const char *json_string = json_object_to_json_string(modes);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(modes); // free
goto exit_cleanup;
}
case IPC_GET_BINDING_STATE:
{
json_object *current_mode = ipc_json_get_binding_mode();
const char *json_string = json_object_to_json_string(current_mode);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(current_mode); // free
goto exit_cleanup;
}
case IPC_GET_CONFIG:
{
json_object *json = json_object_new_object();
json_object_object_add(json, "config", json_object_new_string(config->current_config));
const char *json_string = json_object_to_json_string(json);
ipc_send_reply(client, payload_type, json_string,
(uint32_t)strlen(json_string));
json_object_put(json); // free
goto exit_cleanup;
}
case IPC_SYNC:
{
// It was decided sway will not support this, just return success:false
const char msg[] = "{\"success\": false}";
ipc_send_reply(client, payload_type, msg, strlen(msg));
goto exit_cleanup;
}
default:
sway_log(SWAY_INFO, "Unknown IPC command type %x", payload_type);
goto exit_cleanup;
}
exit_cleanup:
free(buf);
return;
}
bool ipc_send_reply(struct ipc_client *client, enum ipc_command_type payload_type,
const char *payload, uint32_t payload_length) {
assert(payload);
char data[IPC_HEADER_SIZE];
memcpy(data, ipc_magic, sizeof(ipc_magic));
memcpy(data + sizeof(ipc_magic), &payload_length, sizeof(payload_length));
memcpy(data + sizeof(ipc_magic) + sizeof(payload_length), &payload_type, sizeof(payload_type));
while (client->write_buffer_len + IPC_HEADER_SIZE + payload_length >=
client->write_buffer_size) {
client->write_buffer_size *= 2;
}
if (client->write_buffer_size > 4e6) { // 4 MB
sway_log(SWAY_ERROR, "Client write buffer too big (%zu), disconnecting client",
client->write_buffer_size);
ipc_client_disconnect(client);
return false;
}
char *new_buffer = realloc(client->write_buffer, client->write_buffer_size);
if (!new_buffer) {
sway_log(SWAY_ERROR, "Unable to reallocate ipc client write buffer");
ipc_client_disconnect(client);
return false;
}
client->write_buffer = new_buffer;
memcpy(client->write_buffer + client->write_buffer_len, data, IPC_HEADER_SIZE);
client->write_buffer_len += IPC_HEADER_SIZE;
memcpy(client->write_buffer + client->write_buffer_len, payload, payload_length);
client->write_buffer_len += payload_length;
if (!client->writable_event_source) {
client->writable_event_source = wl_event_loop_add_fd(
server.wl_event_loop, client->fd, WL_EVENT_WRITABLE,
ipc_client_handle_writable, client);
}
sway_log(SWAY_DEBUG, "Added IPC reply of type 0x%x to client %d queue: %s",
payload_type, client->fd, payload);
return true;
}