swayfx/sway/ipc-server.c
Drew DeVault 6d83a59b46 Merge pull request #1263 from nyorain/master
Implement get_clipboard ipc message
2017-10-08 11:05:54 -04:00

1185 lines
34 KiB
C

// See https://i3wm.org/docs/ipc.html for protocol information
#define _XOPEN_SOURCE 700
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdbool.h>
#include <wlc/wlc-render.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <json-c/json.h>
#include <list.h>
#include <libinput.h>
#ifdef __linux__
struct ucred {
pid_t pid;
uid_t uid;
gid_t gid;
};
#endif
#include "sway/ipc-json.h"
#include "sway/ipc-server.h"
#include "sway/security.h"
#include "sway/config.h"
#include "sway/commands.h"
#include "sway/input.h"
#include "stringop.h"
#include "log.h"
#include "list.h"
#include "util.h"
static int ipc_socket = -1;
static struct wlc_event_source *ipc_event_source = NULL;
static struct sockaddr_un *ipc_sockaddr = NULL;
static list_t *ipc_client_list = NULL;
static const char ipc_magic[] = {'i', '3', '-', 'i', 'p', 'c'};
struct ipc_client {
struct wlc_event_source *event_source;
struct wlc_event_source *writable_event_source;
int fd;
uint32_t payload_length;
uint32_t security_policy;
enum ipc_command_type current_command;
enum ipc_command_type subscribed_events;
size_t write_buffer_len;
size_t write_buffer_size;
char *write_buffer;
};
static list_t *ipc_get_pixel_requests = NULL;
struct get_pixels_request {
struct ipc_client *client;
wlc_handle output;
struct wlc_geometry geo;
};
struct get_clipboard_request {
struct ipc_client *client;
json_object *json;
int fd;
struct wlc_event_source *fd_event_source;
struct wlc_event_source *timer_event_source;
char *type;
unsigned int *pending;
char *buf;
size_t buf_size;
size_t buf_position;
};
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);
bool ipc_send_reply(struct ipc_client *client, const char *payload, uint32_t payload_length);
void ipc_get_workspaces_callback(swayc_t *workspace, void *data);
void ipc_get_outputs_callback(swayc_t *container, void *data);
static void ipc_get_marks_callback(swayc_t *container, void *data);
void ipc_init(void) {
ipc_socket = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
if (ipc_socket == -1) {
sway_abort("Unable to create 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));
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_get_pixel_requests = create_list();
ipc_event_source = wlc_event_loop_add_fd(ipc_socket, WLC_EVENT_READABLE, ipc_handle_connection, NULL);
}
void ipc_terminate(void) {
if (ipc_event_source) {
wlc_event_source_remove(ipc_event_source);
}
close(ipc_socket);
unlink(ipc_sockaddr->sun_path);
list_free(ipc_client_list);
if (ipc_sockaddr) {
free(ipc_sockaddr);
}
}
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;
}
static pid_t get_client_pid(int client_fd) {
// FreeBSD supports getting uid/gid, but not pid
#ifdef __linux__
struct ucred ucred;
socklen_t len = sizeof(struct ucred);
if (getsockopt(client_fd, SOL_SOCKET, SO_PEERCRED, &ucred, &len) == -1) {
return -1;
}
return ucred.pid;
#else
return -1;
#endif
}
int ipc_handle_connection(int fd, uint32_t mask, void *data) {
(void) fd; (void) data;
sway_log(L_DEBUG, "Event on IPC listening socket");
assert(mask == WLC_EVENT_READABLE);
int client_fd = accept(ipc_socket, NULL, NULL);
if (client_fd == -1) {
sway_log_errno(L_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(L_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(L_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(L_ERROR, "Unable to allocate ipc client");
close(client_fd);
return 0;
}
client->payload_length = 0;
client->fd = client_fd;
client->subscribed_events = 0;
client->event_source = wlc_event_loop_add_fd(client_fd, WLC_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(L_ERROR, "Unable to allocate ipc client write buffer");
close(client_fd);
return 0;
}
pid_t pid = get_client_pid(client->fd);
client->security_policy = get_ipc_policy_mask(pid);
sway_log(L_DEBUG, "New client: fd %d, pid %d", client_fd, pid);
list_add(ipc_client_list, client);
return 0;
}
static const int ipc_header_size = sizeof(ipc_magic)+8;
int ipc_client_handle_readable(int client_fd, uint32_t mask, void *data) {
struct ipc_client *client = data;
if (mask & WLC_EVENT_ERROR) {
sway_log(L_ERROR, "IPC Client socket error, removing client");
ipc_client_disconnect(client);
return 0;
}
if (mask & WLC_EVENT_HANGUP) {
sway_log(L_DEBUG, "Client %d hung up", client->fd);
ipc_client_disconnect(client);
return 0;
}
sway_log(L_DEBUG, "Client %d readable", client->fd);
int read_available;
if (ioctl(client_fd, FIONREAD, &read_available) == -1) {
sway_log_errno(L_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->payload_length > 0) {
if ((uint32_t)read_available >= client->payload_length) {
ipc_client_handle_command(client);
}
return 0;
}
if (read_available < ipc_header_size) {
return 0;
}
uint8_t buf[ipc_header_size];
uint32_t *buf32 = (uint32_t*)(buf + sizeof(ipc_magic));
// 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(L_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(L_DEBUG, "IPC header check failed");
ipc_client_disconnect(client);
return 0;
}
client->payload_length = buf32[0];
client->current_command = (enum ipc_command_type)buf32[1];
if (read_available - received >= (long)client->payload_length) {
ipc_client_handle_command(client);
}
return 0;
}
int ipc_client_handle_writable(int client_fd, uint32_t mask, void *data) {
struct ipc_client *client = data;
if (mask & WLC_EVENT_ERROR) {
sway_log(L_ERROR, "IPC Client socket error, removing client");
ipc_client_disconnect(client);
return 0;
}
if (mask & WLC_EVENT_HANGUP) {
sway_log(L_DEBUG, "Client %d hung up", client->fd);
ipc_client_disconnect(client);
return 0;
}
if (client->write_buffer_len <= 0) {
return 0;
}
sway_log(L_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(L_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) {
wlc_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;
}
if (client->fd != -1) {
shutdown(client->fd, SHUT_RDWR);
}
sway_log(L_INFO, "IPC Client %d disconnected", client->fd);
wlc_event_source_remove(client->event_source);
if (client->writable_event_source) {
wlc_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);
}
bool output_by_name_test(swayc_t *view, void *data) {
char *name = (char *)data;
if (view->type != C_OUTPUT) {
return false;
}
return !strcmp(name, view->name);
}
void ipc_get_pixels(wlc_handle output) {
if (ipc_get_pixel_requests->length == 0) {
return;
}
list_t *unhandled = create_list();
struct get_pixels_request *req;
int i;
for (i = 0; i < ipc_get_pixel_requests->length; ++i) {
req = ipc_get_pixel_requests->items[i];
if (req->output != output) {
list_add(unhandled, req);
continue;
}
const struct wlc_size *size = &req->geo.size;
struct wlc_geometry g_out;
char response_header[9];
memset(response_header, 0, sizeof(response_header));
char *data = malloc(sizeof(response_header) + size->w * size->h * 4);
if (!data) {
sway_log(L_ERROR, "Unable to allocate pixels for get_pixels");
ipc_client_disconnect(req->client);
free(req);
continue;
}
wlc_pixels_read(WLC_RGBA8888, &req->geo, &g_out, data + sizeof(response_header));
response_header[0] = 1;
uint32_t *_size = (uint32_t *)(response_header + 1);
_size[0] = g_out.size.w;
_size[1] = g_out.size.h;
size_t len = sizeof(response_header) + (g_out.size.w * g_out.size.h * 4);
memcpy(data, response_header, sizeof(response_header));
ipc_send_reply(req->client, data, len);
free(data);
// free the request since it has been handled
free(req);
}
// free old list of pixel requests and set new list to all unhandled
// requests (request for another output).
list_free(ipc_get_pixel_requests);
ipc_get_pixel_requests = unhandled;
}
static bool is_text_target(const char *target) {
return (strncmp(target, "text/", 5) == 0
|| strcmp(target, "UTF8_STRING") == 0
|| strcmp(target, "STRING") == 0
|| strcmp(target, "TEXT") == 0
|| strcmp(target, "COMPOUND_TEXT") == 0);
}
static void release_clipboard_request(struct get_clipboard_request *req) {
if (--(*req->pending) == 0) {
const char *str = json_object_to_json_string(req->json);
ipc_send_reply(req->client, str, (uint32_t)strlen(str));
json_object_put(req->json);
}
free(req->type);
free(req->buf);
wlc_event_source_remove(req->fd_event_source);
wlc_event_source_remove(req->timer_event_source);
close(req->fd);
free(req);
}
static int ipc_selection_data_cb(int fd, uint32_t mask, void *data) {
assert(data);
struct get_clipboard_request *req = (struct get_clipboard_request *)data;
if (mask & WLC_EVENT_ERROR) {
sway_log(L_ERROR, "Selection data fd error");
goto error;
}
if (mask & WLC_EVENT_READABLE) {
static const unsigned int max_size = 8192 * 1024;
int amt = 0;
do {
int size = req->buf_size - req->buf_position;
int amt = read(fd, req->buf + req->buf_position, size - 1);
if (amt < 0) {
if (errno == EAGAIN) {
return 0;
}
sway_log_errno(L_INFO, "Failed to read from clipboard data fd");
goto release;
}
req->buf_position += amt;
if (req->buf_position >= req->buf_size - 1) {
if (req->buf_size >= max_size) {
sway_log(L_ERROR, "get_clipbard: selection data too large");
goto error;
}
char *next = realloc(req->buf, req->buf_size *= 2);
if (!next) {
sway_log_errno(L_ERROR, "get_clipboard: realloc data buffer failed");
goto error;
}
req->buf = next;
}
} while(amt != 0);
req->buf[req->buf_position] = '\0';
json_object *obj = json_object_new_object();
json_object_object_add(obj, "success", json_object_new_boolean(true));
if (is_text_target(req->type)) {
json_object_object_add(obj, "content", json_object_new_string(req->buf));
json_object_object_add(req->json, req->type, obj);
} else {
size_t outlen;
char *b64 = b64_encode(req->buf, req->buf_position, &outlen);
json_object_object_add(obj, "content", json_object_new_string(b64));
free(b64);
char *type = malloc(strlen(req->type) + 8);
strcat(type, ";base64");
json_object_object_add(req->json, type, obj);
free(type);
}
}
goto release;
error:;
json_object *obj = json_object_new_object();
json_object_object_add(obj, "success", json_object_new_boolean(false));
json_object_object_add(obj, "error",
json_object_new_string("Failed to retrieve data"));
json_object_object_add(req->json, req->type, obj);
release:
release_clipboard_request(req);
return 0;
}
static int ipc_selection_timer_cb(void *data) {
assert(data);
struct get_clipboard_request *req = (struct get_clipboard_request *)data;
sway_log(L_INFO, "get_clipbard: timeout for type %s", req->type);
json_object *obj = json_object_new_object();
json_object_object_add(obj, "success", json_object_new_boolean(false));
json_object_object_add(obj, "error", json_object_new_string("Timeout"));
json_object_object_add(req->json, req->type, obj);
release_clipboard_request(req);
return 0;
}
// greedy wildcard (only "*") matching
bool mime_type_matches(const char *mime_type, const char *pattern) {
const char *wildcard = NULL;
while (*mime_type && *pattern) {
if (*pattern == '*' && !wildcard) {
wildcard = pattern;
++pattern;
}
if (*mime_type != *pattern) {
if (!wildcard)
return false;
pattern = wildcard;
++mime_type;
continue;
}
++mime_type;
++pattern;
}
while (*pattern == '*') {
++pattern;
}
return (*mime_type == *pattern);
}
void ipc_get_clipboard(struct ipc_client *client, char *buf) {
size_t size;
const char **types = wlc_get_selection_types(&size);
if (client->payload_length == 0) {
json_object *obj = json_object_new_array();
for (size_t i = 0; i < size; ++i) {
json_object_array_add(obj, json_object_new_string(types[i]));
}
const char *str = json_object_to_json_string(obj);
ipc_send_reply(client, str, strlen(str));
json_object_put(obj);
return;
}
unescape_string(buf);
strip_quotes(buf);
list_t *requested = split_string(buf, " ");
json_object *json = json_object_new_object();
unsigned int *pending = malloc(sizeof(unsigned int));
*pending = 0;
for (size_t l = 0; l < (size_t) requested->length; ++l) {
const char *pattern = requested->items[l];
bool found = false;
for (size_t i = 0; i < size; ++i) {
if (!mime_type_matches(types[i], pattern)) {
continue;
}
found = true;
struct get_clipboard_request *req = malloc(sizeof(*req));
if (!req) {
sway_log(L_ERROR, "get_clipboard: request malloc failed");
goto data_error;
}
int pipes[2];
if (pipe(pipes) == -1) {
sway_log_errno(L_ERROR, "get_clipboard: pipe call failed");
free(req);
goto data_error;
}
fcntl(pipes[0], F_SETFD, FD_CLOEXEC | O_NONBLOCK);
fcntl(pipes[1], F_SETFD, FD_CLOEXEC | O_NONBLOCK);
if (!wlc_get_selection_data(types[i], pipes[1])) {
close(pipes[0]);
close(pipes[1]);
free(req);
sway_log(L_ERROR, "get_clipboard: failed to retrieve "
"selection data");
goto data_error;
}
if (!(req->buf = malloc(512))) {
close(pipes[0]);
close(pipes[1]);
free(req);
sway_log_errno(L_ERROR, "get_clipboard: buf malloc failed");
goto data_error;
}
(*pending)++;
req->client = client;
req->type = strdup(types[i]);
req->json = json;
req->pending = pending;
req->buf_position = 0;
req->buf_size = 512;
req->fd = pipes[0];
req->timer_event_source = wlc_event_loop_add_timer(ipc_selection_timer_cb, req);
req->fd_event_source = wlc_event_loop_add_fd(pipes[0],
WLC_EVENT_READABLE | WLC_EVENT_ERROR | WLC_EVENT_HANGUP,
&ipc_selection_data_cb, req);
wlc_event_source_timer_update(req->timer_event_source, 30000);
// NOTE: remove this goto to enable retrieving multiple
// targets at once. The whole implementation is already
// made for it. The only reason it was disabled
// at the time of writing is that neither wlc's xselection
// implementation nor (apparently) gtk on wayland supports
// multiple send requests at the same time which makes
// every request except the last one fail (and therefore
// return empty data)
goto cleanup;
}
if (!found) {
sway_log(L_INFO, "Invalid clipboard type %s requested", pattern);
}
}
if (*pending == 0) {
static const char *error_empty = "{ \"success\": false, \"error\": "
"\"No matching types found\" }";
ipc_send_reply(client, error_empty, (uint32_t)strlen(error_empty));
free(json);
free(pending);
}
goto cleanup;
data_error:;
static const char *error_json = "{ \"success\": false, \"error\": "
"\"Failed to create clipboard data request\" }";
ipc_send_reply(client, error_json, (uint32_t)strlen(error_json));
free(json);
free(pending);
cleanup:
list_free(requested);
free(types);
}
void ipc_client_handle_command(struct ipc_client *client) {
if (!sway_assert(client != NULL, "client != NULL")) {
return;
}
char *buf = malloc(client->payload_length + 1);
if (!buf) {
sway_log_errno(L_INFO, "Unable to allocate IPC payload");
ipc_client_disconnect(client);
return;
}
if (client->payload_length > 0) {
// Payload should be fully available
ssize_t received = recv(client->fd, buf, client->payload_length, 0);
if (received == -1)
{
sway_log_errno(L_INFO, "Unable to receive payload from IPC client");
ipc_client_disconnect(client);
free(buf);
return;
}
}
buf[client->payload_length] = '\0';
const char *error_denied = "{ \"success\": false, \"error\": \"Permission denied\" }";
switch (client->current_command) {
case IPC_COMMAND:
{
if (!(client->security_policy & IPC_FEATURE_COMMAND)) {
goto exit_denied;
}
struct cmd_results *results = handle_command(buf, CONTEXT_IPC);
const char *json = cmd_results_to_json(results);
char reply[256];
int length = snprintf(reply, sizeof(reply), "%s", json);
ipc_send_reply(client, reply, (uint32_t) length);
free_cmd_results(results);
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) {
ipc_send_reply(client, "{\"success\": false}", 18);
sway_log_errno(L_INFO, "Failed to read request");
goto exit_cleanup;
}
// parse requested event types
for (int 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, "mode") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_MODE);
} else if (strcmp(event_type, "window") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_WINDOW);
} else if (strcmp(event_type, "modifier") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_MODIFIER);
} else if (strcmp(event_type, "binding") == 0) {
client->subscribed_events |= event_mask(IPC_EVENT_BINDING);
} else {
ipc_send_reply(client, "{\"success\": false}", 18);
json_object_put(request);
sway_log_errno(L_INFO, "Failed to parse request");
goto exit_cleanup;
}
}
json_object_put(request);
ipc_send_reply(client, "{\"success\": true}", 17);
goto exit_cleanup;
}
case IPC_GET_WORKSPACES:
{
if (!(client->security_policy & IPC_FEATURE_GET_WORKSPACES)) {
goto exit_denied;
}
json_object *workspaces = json_object_new_array();
container_map(&root_container, ipc_get_workspaces_callback, workspaces);
const char *json_string = json_object_to_json_string(workspaces);
ipc_send_reply(client, json_string, (uint32_t) strlen(json_string));
json_object_put(workspaces); // free
goto exit_cleanup;
}
case IPC_GET_INPUTS:
{
if (!(client->security_policy & IPC_FEATURE_GET_INPUTS)) {
goto exit_denied;
}
json_object *inputs = json_object_new_array();
if (input_devices) {
for(int i = 0; i<input_devices->length; i++) {
struct libinput_device *device = input_devices->items[i];
json_object_array_add(inputs, ipc_json_describe_input(device));
}
}
const char *json_string = json_object_to_json_string(inputs);
ipc_send_reply(client, json_string, (uint32_t) strlen(json_string));
json_object_put(inputs);
goto exit_cleanup;
}
case IPC_GET_OUTPUTS:
{
if (!(client->security_policy & IPC_FEATURE_GET_OUTPUTS)) {
goto exit_denied;
}
json_object *outputs = json_object_new_array();
container_map(&root_container, ipc_get_outputs_callback, outputs);
const char *json_string = json_object_to_json_string(outputs);
ipc_send_reply(client, json_string, (uint32_t) strlen(json_string));
json_object_put(outputs); // free
goto exit_cleanup;
}
case IPC_GET_TREE:
{
if (!(client->security_policy & IPC_FEATURE_GET_TREE)) {
goto exit_denied;
}
json_object *tree = ipc_json_describe_container_recursive(&root_container);
const char *json_string = json_object_to_json_string(tree);
ipc_send_reply(client, json_string, (uint32_t) strlen(json_string));
json_object_put(tree);
goto exit_cleanup;
}
case IPC_GET_MARKS:
{
if (!(client->security_policy & IPC_FEATURE_GET_MARKS)) {
goto exit_denied;
}
json_object *marks = json_object_new_array();
container_map(&root_container, ipc_get_marks_callback, marks);
const char *json_string = json_object_to_json_string(marks);
ipc_send_reply(client, 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, json_string, (uint32_t)strlen(json_string));
json_object_put(version); // free
goto exit_cleanup;
}
case IPC_SWAY_GET_PIXELS:
{
char response_header[9];
memset(response_header, 0, sizeof(response_header));
json_object *obj = json_tokener_parse(buf);
json_object *o, *x, *y, *w, *h;
json_object_object_get_ex(obj, "output", &o);
json_object_object_get_ex(obj, "x", &x);
json_object_object_get_ex(obj, "y", &y);
json_object_object_get_ex(obj, "w", &w);
json_object_object_get_ex(obj, "h", &h);
struct wlc_geometry g = {
.origin = {
.x = json_object_get_int(x),
.y = json_object_get_int(y)
},
.size = {
.w = json_object_get_int(w),
.h = json_object_get_int(h)
}
};
swayc_t *output = swayc_by_test(&root_container, output_by_name_test, (void *)json_object_get_string(o));
json_object_put(obj);
if (!output) {
sway_log(L_ERROR, "IPC GET_PIXELS request with unknown output name");
ipc_send_reply(client, response_header, sizeof(response_header));
goto exit_cleanup;
}
struct get_pixels_request *req = malloc(sizeof(struct get_pixels_request));
if (!req) {
sway_log(L_ERROR, "Unable to allocate get_pixels request");
goto exit_cleanup;
}
req->client = client;
req->output = output->handle;
req->geo = g;
list_add(ipc_get_pixel_requests, req);
wlc_output_schedule_render(output->handle);
goto exit_cleanup;
}
case IPC_GET_BAR_CONFIG:
{
if (!(client->security_policy & IPC_FEATURE_GET_BAR_CONFIG)) {
goto exit_denied;
}
if (!buf[0]) {
// Send list of configured bar IDs
json_object *bars = json_object_new_array();
int i;
for (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, json_string, (uint32_t)strlen(json_string));
json_object_put(bars); // free
} else {
// Send particular bar's details
struct bar_config *bar = NULL;
int i;
for (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, 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, json_string, (uint32_t)strlen(json_string));
json_object_put(json); // free
}
goto exit_cleanup;
}
case IPC_GET_CLIPBOARD:
{
if (!(client->security_policy & IPC_FEATURE_GET_CLIPBOARD)) {
goto exit_denied;
}
ipc_get_clipboard(client, buf);
goto exit_cleanup;
}
default:
sway_log(L_INFO, "Unknown IPC command type %i", client->current_command);
goto exit_cleanup;
}
exit_denied:
ipc_send_reply(client, error_denied, (uint32_t)strlen(error_denied));
sway_log(L_DEBUG, "Denied IPC client access to %i", client->current_command);
exit_cleanup:
client->payload_length = 0;
free(buf);
return;
}
bool ipc_send_reply(struct ipc_client *client, const char *payload, uint32_t payload_length) {
assert(payload);
char data[ipc_header_size];
uint32_t *data32 = (uint32_t*)(data + sizeof(ipc_magic));
memcpy(data, ipc_magic, sizeof(ipc_magic));
data32[0] = payload_length;
data32[1] = client->current_command;
while (client->write_buffer_len + ipc_header_size + payload_length >=
client->write_buffer_size) {
client->write_buffer_size *= 2;
}
// TODO: reduce the limit back to 4 MB when screenshooter is implemented
if (client->write_buffer_size > (1 << 28)) { // 256 MB
sway_log(L_ERROR, "Client write buffer too big, disconnecting client");
ipc_client_disconnect(client);
return false;
}
char *new_buffer = realloc(client->write_buffer, client->write_buffer_size);
if (!new_buffer) {
sway_log(L_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 = wlc_event_loop_add_fd(client->fd, WLC_EVENT_WRITABLE, ipc_client_handle_writable, client);
}
sway_log(L_DEBUG, "Added IPC reply to client %d queue: %s", client->fd, payload);
return true;
}
void ipc_get_workspaces_callback(swayc_t *workspace, void *data) {
if (workspace->type == C_WORKSPACE) {
json_object *workspace_json = ipc_json_describe_container(workspace);
// override the default focused indicator because
// it's set differently for the get_workspaces reply
bool focused = root_container.focused == workspace->parent && workspace->parent->focused == workspace;
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);
}
}
void ipc_get_outputs_callback(swayc_t *container, void *data) {
if (container->type == C_OUTPUT) {
json_object_array_add((json_object *)data, ipc_json_describe_container(container));
}
}
static void ipc_get_marks_callback(swayc_t *container, void *data) {
json_object *object = (json_object *)data;
if (container->marks) {
for (int i = 0; i < container->marks->length; ++i) {
char *mark = (char *)container->marks->items[i];
json_object_array_add(object, json_object_new_string(mark));
}
}
}
void ipc_send_event(const char *json_string, enum ipc_command_type event) {
static struct {
enum ipc_command_type event;
enum ipc_feature feature;
} security_mappings[] = {
{ IPC_EVENT_WORKSPACE, IPC_FEATURE_EVENT_WORKSPACE },
{ IPC_EVENT_OUTPUT, IPC_FEATURE_EVENT_OUTPUT },
{ IPC_EVENT_MODE, IPC_FEATURE_EVENT_MODE },
{ IPC_EVENT_WINDOW, IPC_FEATURE_EVENT_WINDOW },
{ IPC_EVENT_BINDING, IPC_FEATURE_EVENT_BINDING },
{ IPC_EVENT_INPUT, IPC_FEATURE_EVENT_INPUT }
};
uint32_t security_mask = 0;
for (size_t i = 0; i < sizeof(security_mappings) / sizeof(security_mappings[0]); ++i) {
if (security_mappings[i].event == event) {
security_mask = security_mappings[i].feature;
break;
}
}
int i;
struct ipc_client *client;
for (i = 0; i < ipc_client_list->length; i++) {
client = ipc_client_list->items[i];
if (!(client->security_policy & security_mask)) {
continue;
}
if ((client->subscribed_events & event_mask(event)) == 0) {
continue;
}
client->current_command = event;
if (!ipc_send_reply(client, json_string, (uint32_t) strlen(json_string))) {
sway_log_errno(L_INFO, "Unable to send reply to IPC client");
ipc_client_disconnect(client);
}
}
}
void ipc_event_workspace(swayc_t *old, swayc_t *new, const char *change) {
sway_log(L_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 (strcmp("focus", change) == 0) {
if (old) {
json_object_object_add(obj, "old", ipc_json_describe_container_recursive(old));
} else {
json_object_object_add(obj, "old", NULL);
}
}
if (new) {
json_object_object_add(obj, "current", ipc_json_describe_container_recursive(new));
} 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); // free
}
void ipc_event_window(swayc_t *window, const char *change) {
sway_log(L_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_container_recursive(window));
const char *json_string = json_object_to_json_string(obj);
ipc_send_event(json_string, IPC_EVENT_WINDOW);
json_object_put(obj); // free
}
void ipc_event_barconfig_update(struct bar_config *bar) {
sway_log(L_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); // free
}
void ipc_event_mode(const char *mode) {
sway_log(L_DEBUG, "Sending mode::%s event", mode);
json_object *obj = json_object_new_object();
json_object_object_add(obj, "change", json_object_new_string(mode));
const char *json_string = json_object_to_json_string(obj);
ipc_send_event(json_string, IPC_EVENT_MODE);
json_object_put(obj); // free
}
void ipc_event_modifier(uint32_t modifier, const char *state) {
sway_log(L_DEBUG, "Sending modifier::%s event", state);
json_object *obj = json_object_new_object();
json_object_object_add(obj, "change", json_object_new_string(state));
const char *modifier_name = get_modifier_name_by_mask(modifier);
json_object_object_add(obj, "modifier", json_object_new_string(modifier_name));
const char *json_string = json_object_to_json_string(obj);
ipc_send_event(json_string, IPC_EVENT_MODIFIER);
json_object_put(obj); // free
}
static void ipc_event_binding(json_object *sb_obj) {
sway_log(L_DEBUG, "Sending binding::run event");
json_object *obj = json_object_new_object();
json_object_object_add(obj, "change", json_object_new_string("run"));
json_object_object_add(obj, "binding", sb_obj);
const char *json_string = json_object_to_json_string(obj);
ipc_send_event(json_string, IPC_EVENT_BINDING);
json_object_put(obj); // free
}
void ipc_event_binding_keyboard(struct sway_binding *sb) {
json_object *sb_obj = json_object_new_object();
json_object_object_add(sb_obj, "command", json_object_new_string(sb->command));
const char *names[10];
int len = get_modifier_names(names, sb->modifiers);
int i;
json_object *modifiers = json_object_new_array();
for (i = 0; i < len; ++i) {
json_object_array_add(modifiers, json_object_new_string(names[i]));
}
json_object_object_add(sb_obj, "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;
if (sb->bindcode) { // bindcode: populate input_codes
uint32_t keycode;
for (i = 0; i < sb->keys->length; ++i) {
keycode = *(uint32_t *)sb->keys->items[i];
json_object_array_add(input_codes, json_object_new_int(keycode));
if (i == 0) {
input_code = keycode;
}
}
} else { // bindsym: populate symbols
uint32_t keysym;
char buffer[64];
for (i = 0; i < sb->keys->length; ++i) {
keysym = *(uint32_t *)sb->keys->items[i];
if (xkb_keysym_get_name(keysym, buffer, 64) > 0) {
json_object *str = json_object_new_string(buffer);
json_object_array_add(symbols, str);
if (i == 0) {
symbol = str;
}
}
}
}
json_object_object_add(sb_obj, "input_codes", input_codes);
json_object_object_add(sb_obj, "input_code", json_object_new_int(input_code));
json_object_object_add(sb_obj, "symbols", symbols);
json_object_object_add(sb_obj, "symbol", symbol);
json_object_object_add(sb_obj, "input_type", json_object_new_string("keyboard"));
ipc_event_binding(sb_obj);
}