#include "broadway-server.h" #include "broadway-output.h" #define _XOPEN_SOURCE /* for crypt */ #include #include #include "gdktypes.h" #include #include #include #include #include #include #include #include #include #include #include #include typedef struct BroadwayInput BroadwayInput; typedef struct BroadwayWindow BroadwayWindow; struct _BroadwayServer { GObject parent_instance; char *password; char *address; int port; GSocketService *service; BroadwayOutput *output; guint32 id_counter; guint32 saved_serial; guint64 last_seen_time; BroadwayInput *input; GList *input_messages; guint process_input_idle; GHashTable *id_ht; GList *toplevels; BroadwayWindow *root; guint32 screen_width; guint32 screen_height; gint32 mouse_in_toplevel_id; int last_x, last_y; /* in root coords */ guint32 last_state; gint32 real_mouse_in_toplevel_id; /* Not affected by grabs */ /* Explicit pointer grabs: */ gint32 pointer_grab_window_id; /* -1 => none */ gint32 pointer_grab_client_id; /* -1 => none */ guint32 pointer_grab_time; gboolean pointer_grab_owner_events; /* Future data, from the currently queued events */ int future_root_x; int future_root_y; guint32 future_state; int future_mouse_in_toplevel; }; struct _BroadwayServerClass { GObjectClass parent_class; }; typedef struct HttpRequest { BroadwayServer *server; GSocketConnection *connection; GDataInputStream *data; GString *request; } HttpRequest; struct BroadwayInput { BroadwayServer *server; BroadwayOutput *output; GSocketConnection *connection; GByteArray *buffer; GSource *source; gboolean seen_time; gint64 time_base; gboolean proto_v7_plus; gboolean binary; gboolean active; }; struct BroadwayWindow { gint32 id; gint32 x; gint32 y; gint32 width; gint32 height; gboolean is_temp; gboolean last_synced; gboolean visible; gint32 transient_for; cairo_surface_t *last_surface; char *cached_surface_name; cairo_surface_t *cached_surface; }; static void broadway_server_resync_windows (BroadwayServer *server); G_DEFINE_TYPE (BroadwayServer, broadway_server, G_TYPE_OBJECT) static void broadway_server_init (BroadwayServer *server) { BroadwayWindow *root; char *passwd_file; char *password, *p; server->service = g_socket_service_new (); server->pointer_grab_window_id = -1; server->saved_serial = 1; server->last_seen_time = 1; server->id_ht = g_hash_table_new (NULL, NULL); server->id_counter = 0; passwd_file = g_build_filename (g_get_user_config_dir (), "broadway.passwd", NULL); if (g_file_get_contents (passwd_file, &password, NULL, NULL)) { p = strchr (password, '\n'); if (p) *p = 0; g_strstrip (password); if (strlen (password) > 3) server->password = password; else g_free (password); } root = g_new0 (BroadwayWindow, 1); root->id = server->id_counter++; root->width = 1024; root->height = 768; root->visible = TRUE; server->root = root; g_hash_table_insert (server->id_ht, GINT_TO_POINTER (root->id), root); } static void broadway_server_finalize (GObject *object) { BroadwayServer *server = BROADWAY_SERVER (object); g_free (server->address); G_OBJECT_CLASS (broadway_server_parent_class)->finalize (object); } static void broadway_server_class_init (BroadwayServerClass * class) { GObjectClass *object_class = G_OBJECT_CLASS (class); object_class->finalize = broadway_server_finalize; } static void start (BroadwayInput *input); static void http_request_free (HttpRequest *request) { g_object_unref (request->connection); g_object_unref (request->data); g_string_free (request->request, TRUE); g_free (request); } static void broadway_input_free (BroadwayInput *input) { g_object_unref (input->connection); g_byte_array_free (input->buffer, FALSE); g_source_destroy (input->source); g_free (input); } static void update_event_state (BroadwayServer *server, BroadwayInputMsg *message) { BroadwayWindow *window; switch (message->base.type) { case BROADWAY_EVENT_ENTER: server->last_x = message->pointer.root_x; server->last_y = message->pointer.root_y; server->last_state = message->pointer.state; server->real_mouse_in_toplevel_id = message->pointer.mouse_window_id; /* TODO: Unset when it dies */ server->mouse_in_toplevel_id = message->pointer.event_window_id; break; case BROADWAY_EVENT_LEAVE: server->last_x = message->pointer.root_x; server->last_y = message->pointer.root_y; server->last_state = message->pointer.state; server->real_mouse_in_toplevel_id = message->pointer.mouse_window_id; server->mouse_in_toplevel_id = 0; break; case BROADWAY_EVENT_POINTER_MOVE: server->last_x = message->pointer.root_x; server->last_y = message->pointer.root_y; server->last_state = message->pointer.state; server->real_mouse_in_toplevel_id = message->pointer.mouse_window_id; break; case BROADWAY_EVENT_BUTTON_PRESS: case BROADWAY_EVENT_BUTTON_RELEASE: server->last_x = message->pointer.root_x; server->last_y = message->pointer.root_y; server->last_state = message->pointer.state; server->real_mouse_in_toplevel_id = message->pointer.mouse_window_id; break; case BROADWAY_EVENT_SCROLL: server->last_x = message->pointer.root_x; server->last_y = message->pointer.root_y; server->last_state = message->pointer.state; server->real_mouse_in_toplevel_id = message->pointer.mouse_window_id; break; case BROADWAY_EVENT_KEY_PRESS: case BROADWAY_EVENT_KEY_RELEASE: server->last_state = message->key.state; break; case BROADWAY_EVENT_GRAB_NOTIFY: case BROADWAY_EVENT_UNGRAB_NOTIFY: break; case BROADWAY_EVENT_CONFIGURE_NOTIFY: window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (message->configure_notify.id)); if (window != NULL) { window->x = message->configure_notify.x; window->y = message->configure_notify.y; } break; case BROADWAY_EVENT_DELETE_NOTIFY: break; case BROADWAY_EVENT_SCREEN_SIZE_CHANGED: server->root->width = message->screen_resize_notify.width; server->root->height = message->screen_resize_notify.height; break; default: g_printerr ("update_event_state - Unknown input command %c\n", message->base.type); break; } } gboolean broadway_server_lookahead_event (BroadwayServer *server, const char *types) { BroadwayInputMsg *message; GList *l; for (l = server->input_messages; l != NULL; l = l->next) { message = l->data; if (strchr (types, message->base.type) != NULL) return TRUE; } return FALSE; } static gboolean is_pointer_event (BroadwayInputMsg *message) { return message->base.type == BROADWAY_EVENT_ENTER || message->base.type == BROADWAY_EVENT_LEAVE || message->base.type == BROADWAY_EVENT_POINTER_MOVE || message->base.type == BROADWAY_EVENT_BUTTON_PRESS || message->base.type == BROADWAY_EVENT_BUTTON_RELEASE || message->base.type == BROADWAY_EVENT_SCROLL || message->base.type == BROADWAY_EVENT_GRAB_NOTIFY || message->base.type == BROADWAY_EVENT_UNGRAB_NOTIFY; } static void process_input_message (BroadwayServer *server, BroadwayInputMsg *message) { gint32 client; update_event_state (server, message); client = -1; if (is_pointer_event (message) && server->pointer_grab_window_id != -1) client = server->pointer_grab_client_id; broadway_events_got_input (message, client); } static void process_input_messages (BroadwayServer *server) { BroadwayInputMsg *message; while (server->input_messages) { message = server->input_messages->data; server->input_messages = g_list_delete_link (server->input_messages, server->input_messages); if (message->base.serial == 0) { /* This was sent before we got any requests, but we don't want the daemon serials to go backwards, so we fix it up to be the last used serial */ message->base.serial = server->saved_serial - 1; } process_input_message (server, message); g_free (message); } } static void fake_configure_notify (BroadwayServer *server, BroadwayWindow *window) { BroadwayInputMsg ev = { {0} }; ev.base.type = BROADWAY_EVENT_CONFIGURE_NOTIFY; ev.base.serial = server->saved_serial - 1; ev.base.time = server->last_seen_time; ev.configure_notify.id = window->id; ev.configure_notify.x = window->x; ev.configure_notify.y = window->y; ev.configure_notify.width = window->width; ev.configure_notify.height = window->height; process_input_message (server, &ev); } static char * parse_pointer_data (char *p, BroadwayInputPointerMsg *data) { data->mouse_window_id = strtol (p, &p, 10); p++; /* Skip , */ data->event_window_id = strtol (p, &p, 10); p++; /* Skip , */ data->root_x = strtol (p, &p, 10); p++; /* Skip , */ data->root_y = strtol (p, &p, 10); p++; /* Skip , */ data->win_x = strtol (p, &p, 10); p++; /* Skip , */ data->win_y = strtol (p, &p, 10); p++; /* Skip , */ data->state = strtol (p, &p, 10); return p; } static void update_future_pointer_info (BroadwayServer *server, BroadwayInputPointerMsg *data) { server->future_root_x = data->root_x; server->future_root_y = data->root_y; server->future_state = data->state; server->future_mouse_in_toplevel = data->mouse_window_id; } static gboolean verify_password (BroadwayServer *server, const char *password) { char *hash; hash = crypt (password, server->password); return strcmp (hash, server->password) == 0; } static void parse_input_message (BroadwayInput *input, const char *message) { BroadwayServer *server = input->server; BroadwayInputMsg msg; char *p; gint64 time_; if (!input->active) { /* The input has not been activated yet, handle auth/start */ if (message[0] != 'l' || !verify_password (server, message+1)) { broadway_output_request_auth (input->output); broadway_output_flush (input->output); } else start (input); return; } memset (&msg, 0, sizeof (msg)); p = (char *)message; msg.base.type = *p++; msg.base.serial = (guint32)strtol (p, &p, 10); p++; /* Skip , */ time_ = strtol(p, &p, 10); p++; /* Skip , */ if (time_ == 0) { time_ = server->last_seen_time; } else { if (!input->seen_time) { input->seen_time = TRUE; /* Calculate time base so that any following times are normalized to start 5 seconds after last_seen_time, to avoid issues that could appear when a long hiatus due to a reconnect seems to be instant */ input->time_base = time_ - (server->last_seen_time + 5000); } time_ = time_ - input->time_base; } server->last_seen_time = time_; msg.base.time = time_; switch (msg.base.type) { case BROADWAY_EVENT_ENTER: case BROADWAY_EVENT_LEAVE: p = parse_pointer_data (p, &msg.pointer); update_future_pointer_info (server, &msg.pointer); p++; /* Skip , */ msg.crossing.mode = strtol(p, &p, 10); break; case BROADWAY_EVENT_POINTER_MOVE: /* Mouse move */ p = parse_pointer_data (p, &msg.pointer); update_future_pointer_info (server, &msg.pointer); break; case BROADWAY_EVENT_BUTTON_PRESS: case BROADWAY_EVENT_BUTTON_RELEASE: p = parse_pointer_data (p, &msg.pointer); update_future_pointer_info (server, &msg.pointer); p++; /* Skip , */ msg.button.button = strtol(p, &p, 10); break; case BROADWAY_EVENT_SCROLL: p = parse_pointer_data (p, &msg.pointer); update_future_pointer_info (server, &msg.pointer); p++; /* Skip , */ msg.scroll.dir = strtol(p, &p, 10); break; case BROADWAY_EVENT_KEY_PRESS: case BROADWAY_EVENT_KEY_RELEASE: msg.key.mouse_window_id = strtol(p, &p, 10); p++; /* Skip , */ msg.key.key = strtol(p, &p, 10); p++; /* Skip , */ msg.key.state = strtol(p, &p, 10); break; case BROADWAY_EVENT_GRAB_NOTIFY: case BROADWAY_EVENT_UNGRAB_NOTIFY: msg.grab_reply.res = strtol(p, &p, 10); break; case BROADWAY_EVENT_CONFIGURE_NOTIFY: msg.configure_notify.id = strtol(p, &p, 10); p++; /* Skip , */ msg.configure_notify.x = strtol (p, &p, 10); p++; /* Skip , */ msg.configure_notify.y = strtol (p, &p, 10); p++; /* Skip , */ msg.configure_notify.width = strtol (p, &p, 10); p++; /* Skip , */ msg.configure_notify.height = strtol (p, &p, 10); break; case BROADWAY_EVENT_DELETE_NOTIFY: msg.delete_notify.id = strtol(p, &p, 10); break; case BROADWAY_EVENT_SCREEN_SIZE_CHANGED: msg.screen_resize_notify.width = strtol (p, &p, 10); p++; /* Skip , */ msg.screen_resize_notify.height = strtol (p, &p, 10); break; default: g_printerr ("parse_input_message - Unknown input command %c (%s)\n", msg.base.type, message); break; } server->input_messages = g_list_append (server->input_messages, g_memdup (&msg, sizeof (msg))); } static inline void hex_dump (guchar *data, gsize len) { #ifdef DEBUG_WEBSOCKETS gsize i, j; for (j = 0; j < len + 15; j += 16) { fprintf (stderr, "0x%.4x ", j); for (i = 0; i < 16; i++) { if ((j + i) < len) fprintf (stderr, "%.2x ", data[j+i]); else fprintf (stderr, " "); if (i == 8) fprintf (stderr, " "); } fprintf (stderr, " | "); for (i = 0; i < 16; i++) if ((j + i) < len && g_ascii_isalnum(data[j+i])) fprintf (stderr, "%c", data[j+i]); else fprintf (stderr, "."); fprintf (stderr, "\n"); } #endif } static void parse_input (BroadwayInput *input) { BroadwayServer *server = input->server; if (!input->buffer->len) return; if (input->proto_v7_plus) { hex_dump (input->buffer->data, input->buffer->len); while (input->buffer->len > 2) { gsize len, payload_len; BroadwayWSOpCode code; gboolean is_mask, fin; guchar *buf, *data, *mask; buf = input->buffer->data; len = input->buffer->len; #ifdef DEBUG_WEBSOCKETS g_print ("Parse input first byte 0x%2x 0x%2x\n", buf[0], buf[1]); #endif fin = buf[0] & 0x80; code = buf[0] & 0x0f; payload_len = buf[1] & 0x7f; is_mask = buf[1] & 0x80; data = buf + 2; if (payload_len > 125) { if (len < 4) return; payload_len = GUINT16_FROM_BE( *(guint16 *) data ); data += 2; } else if (payload_len > 126) { if (len < 10) return; payload_len = GUINT64_FROM_BE( *(guint64 *) data ); data += 8; } mask = NULL; if (is_mask) { if (data - buf + 4 > len) return; mask = data; data += 4; } if (data - buf + payload_len > len) return; /* wait to accumulate more */ if (is_mask) { gsize i; for (i = 0; i < payload_len; i++) data[i] ^= mask[i%4]; } switch (code) { case BROADWAY_WS_CNX_CLOSE: break; /* hang around anyway */ case BROADWAY_WS_TEXT: if (!fin) { #ifdef DEBUG_WEBSOCKETS g_warning ("can't yet accept fragmented input"); #endif } else { char *terminated = g_strndup((char *)data, payload_len); parse_input_message (input, terminated); g_free (terminated); } break; case BROADWAY_WS_CNX_PING: broadway_output_pong (input->output); break; case BROADWAY_WS_CNX_PONG: break; /* we never send pings, but tolerate pongs */ case BROADWAY_WS_BINARY: case BROADWAY_WS_CONTINUATION: default: { g_warning ("fragmented or unknown input code 0x%2x with fin set", code); break; } } g_byte_array_remove_range (input->buffer, 0, data - buf + payload_len); } } else /* old style protocol */ { char *buf, *ptr; gsize len; buf = (char *)input->buffer->data; len = input->buffer->len; if (buf[0] != 0) { if (server->input == input) server->input = NULL; broadway_input_free (input); return; } while ((ptr = memchr (buf, 0xff, len)) != NULL) { *ptr = 0; ptr++; parse_input_message (input, buf + 1); len -= ptr - buf; buf = ptr; if (len > 0 && buf[0] != 0) { if (server->input == input) server->input = NULL; broadway_input_free (input); break; } } g_byte_array_remove_range (input->buffer, 0, buf - (char *)input->buffer->data); } } static gboolean process_input_idle_cb (BroadwayServer *server) { server->process_input_idle = 0; process_input_messages (server); return G_SOURCE_REMOVE; } static void queue_process_input_at_idle (BroadwayServer *server) { if (server->process_input_idle == 0) server->process_input_idle = g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc)process_input_idle_cb, server, NULL); } static void broadway_server_read_all_input_nonblocking (BroadwayInput *input) { GInputStream *in; gssize res; guint8 buffer[1024]; GError *error; if (input == NULL) return; in = g_io_stream_get_input_stream (G_IO_STREAM (input->connection)); error = NULL; res = g_pollable_input_stream_read_nonblocking (G_POLLABLE_INPUT_STREAM (in), buffer, sizeof (buffer), NULL, &error); if (res <= 0) { if (res < 0 && g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK)) { g_error_free (error); return; } if (input->server->input == input) input->server->input = NULL; broadway_input_free (input); if (res < 0) { g_printerr ("input error %s\n", error->message); g_error_free (error); } return; } g_byte_array_append (input->buffer, buffer, res); parse_input (input); } static void broadway_server_consume_all_input (BroadwayServer *server) { broadway_server_read_all_input_nonblocking (server->input); /* Since we're parsing input but not processing the resulting messages we might not get a readable callback on the stream, so queue an idle to process the messages */ queue_process_input_at_idle (server); } static gboolean input_data_cb (GObject *stream, BroadwayInput *input) { BroadwayServer *server = input->server; broadway_server_read_all_input_nonblocking (input); if (input->active) process_input_messages (server); return TRUE; } guint32 broadway_server_get_next_serial (BroadwayServer *server) { if (server->output) return broadway_output_get_next_serial (server->output); return server->saved_serial; } void broadway_server_get_screen_size (BroadwayServer *server, guint32 *width, guint32 *height) { *width = server->root->width; *height = server->root->height; } void broadway_server_flush (BroadwayServer *server) { if (server->output && !broadway_output_flush (server->output)) { server->saved_serial = broadway_output_get_next_serial (server->output); broadway_output_free (server->output); server->output = NULL; } } void broadway_server_sync (BroadwayServer *server) { broadway_server_flush (server); } /* TODO: This is not used atm, is it needed? */ /* Note: This may be called while handling a message (i.e. sorta recursively) */ BroadwayInputMsg * broadway_server_block_for_input (BroadwayServer *server, char op, guint32 serial, gboolean remove_message) { BroadwayInputMsg *message; gssize res; guint8 buffer[1024]; BroadwayInput *input; GInputStream *in; GList *l; broadway_server_flush (server); if (server->input == NULL) return NULL; input = server->input; while (TRUE) { /* Check for existing reply in queue */ for (l = server->input_messages; l != NULL; l = l->next) { message = l->data; if (message->base.type == op) { if (message->base.serial == serial) { if (remove_message) server->input_messages = g_list_delete_link (server->input_messages, l); return message; } } } /* Not found, read more, blocking */ in = g_io_stream_get_input_stream (G_IO_STREAM (input->connection)); res = g_input_stream_read (in, buffer, sizeof (buffer), NULL, NULL); if (res <= 0) return NULL; g_byte_array_append (input->buffer, buffer, res); parse_input (input); /* Since we're parsing input but not processing the resulting messages we might not get a readable callback on the stream, so queue an idle to process the messages */ queue_process_input_at_idle (server); } } static char * parse_line (char *line, char *key) { char *p; if (!g_str_has_prefix (line, key)) return NULL; p = line + strlen (key); if (*p != ':') return NULL; p++; /* Skip optional initial space */ if (*p == ' ') p++; return p; } static void send_error (HttpRequest *request, int error_code, const char *reason) { char *res; res = g_strdup_printf ("HTTP/1.0 %d %s\r\n\r\n" "%d %s" "%s", error_code, reason, error_code, reason, reason); /* TODO: This should really be async */ g_output_stream_write_all (g_io_stream_get_output_stream (G_IO_STREAM (request->connection)), res, strlen (res), NULL, NULL, NULL); g_free (res); http_request_free (request); } /* magic from: http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17 */ #define SEC_WEB_SOCKET_KEY_MAGIC "258EAFA5-E914-47DA-95CA-C5AB0DC85B11" /* 'x3JJHMbDL1EzLkh9GBhXDw==' generates 'HSmrc0sMlYUkAGmm5OPpG2HaGWk=' */ static gchar * generate_handshake_response_wsietf_v7 (const gchar *key) { gsize digest_len = 20; guchar digest[digest_len]; GChecksum *checksum; checksum = g_checksum_new (G_CHECKSUM_SHA1); if (!checksum) return NULL; g_checksum_update (checksum, (guchar *)key, -1); g_checksum_update (checksum, (guchar *)SEC_WEB_SOCKET_KEY_MAGIC, -1); g_checksum_get_digest (checksum, digest, &digest_len); g_checksum_free (checksum); g_assert (digest_len == 20); return g_base64_encode (digest, digest_len); } static void start_input (HttpRequest *request, gboolean binary) { char **lines; char *p; int num_key1, num_key2; guint64 key1, key2; int num_space; int i; guint8 challenge[16]; char *res; gsize len; GChecksum *checksum; char *origin, *host; BroadwayInput *input; const void *data_buffer; gsize data_buffer_size; GInputStream *in; char *key_v7; gboolean proto_v7_plus; GSocket *socket; int flag = 1; #ifdef DEBUG_WEBSOCKETS g_print ("incoming request:\n%s\n", request->request->str); #endif lines = g_strsplit (request->request->str, "\n", 0); num_key1 = 0; num_key2 = 0; key1 = 0; key2 = 0; key_v7 = NULL; origin = NULL; host = NULL; for (i = 0; lines[i] != NULL; i++) { if ((p = parse_line (lines[i], "Sec-WebSocket-Key1"))) { num_space = 0; while (*p != 0) { if (g_ascii_isdigit (*p)) key1 = key1 * 10 + g_ascii_digit_value (*p); else if (*p == ' ') num_space++; p++; } key1 /= num_space; num_key1++; } else if ((p = parse_line (lines[i], "Sec-WebSocket-Key2"))) { num_space = 0; while (*p != 0) { if (g_ascii_isdigit (*p)) key2 = key2 * 10 + g_ascii_digit_value (*p); else if (*p == ' ') num_space++; p++; } key2 /= num_space; num_key2++; } else if ((p = parse_line (lines[i], "Sec-WebSocket-Key"))) { key_v7 = p; } else if ((p = parse_line (lines[i], "Origin"))) { origin = p; } else if ((p = parse_line (lines[i], "Host"))) { host = p; } else if ((p = parse_line (lines[i], "Sec-WebSocket-Origin"))) { origin = p; } } if (host == NULL) { g_strfreev (lines); send_error (request, 400, "Bad websocket request"); return; } if (key_v7 != NULL) { char* accept = generate_handshake_response_wsietf_v7 (key_v7); res = g_strdup_printf ("HTTP/1.1 101 Switching Protocols\r\n" "Upgrade: websocket\r\n" "Connection: Upgrade\r\n" "Sec-WebSocket-Accept: %s\r\n" "%s%s%s" "Sec-WebSocket-Location: ws://%s/socket\r\n" "Sec-WebSocket-Protocol: broadway\r\n" "\r\n", accept, origin?"Sec-WebSocket-Origin: ":"", origin?origin:"", origin?"\r\n":"", host); g_free (accept); #ifdef DEBUG_WEBSOCKETS g_print ("v7 proto response:\n%s", res); #endif g_output_stream_write_all (g_io_stream_get_output_stream (G_IO_STREAM (request->connection)), res, strlen (res), NULL, NULL, NULL); g_free (res); proto_v7_plus = TRUE; } else { if (num_key1 != 1 || num_key2 != 1) { g_strfreev (lines); send_error (request, 400, "Bad websocket request"); return; } challenge[0] = (key1 >> 24) & 0xff; challenge[1] = (key1 >> 16) & 0xff; challenge[2] = (key1 >> 8) & 0xff; challenge[3] = (key1 >> 0) & 0xff; challenge[4] = (key2 >> 24) & 0xff; challenge[5] = (key2 >> 16) & 0xff; challenge[6] = (key2 >> 8) & 0xff; challenge[7] = (key2 >> 0) & 0xff; if (!g_input_stream_read_all (G_INPUT_STREAM (request->data), challenge+8, 8, NULL, NULL, NULL)) { g_strfreev (lines); send_error (request, 400, "Bad websocket request"); return; } checksum = g_checksum_new (G_CHECKSUM_MD5); g_checksum_update (checksum, challenge, 16); len = 16; g_checksum_get_digest (checksum, challenge, &len); g_checksum_free (checksum); res = g_strdup_printf ("HTTP/1.1 101 WebSocket Protocol Handshake\r\n" "Upgrade: WebSocket\r\n" "Connection: Upgrade\r\n" "%s%s%s" "Sec-WebSocket-Location: ws://%s/socket\r\n" "Sec-WebSocket-Protocol: broadway\r\n" "\r\n", origin?"Sec-WebSocket-Origin: ":"", origin?origin:"", origin?"\r\n":"", host); #ifdef DEBUG_WEBSOCKETS g_print ("legacy response:\n%s", res); #endif g_output_stream_write_all (g_io_stream_get_output_stream (G_IO_STREAM (request->connection)), res, strlen (res), NULL, NULL, NULL); g_free (res); g_output_stream_write_all (g_io_stream_get_output_stream (G_IO_STREAM (request->connection)), challenge, 16, NULL, NULL, NULL); proto_v7_plus = FALSE; } socket = g_socket_connection_get_socket (request->connection); setsockopt (g_socket_get_fd (socket), IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int)); input = g_new0 (BroadwayInput, 1); input->server = request->server; input->connection = g_object_ref (request->connection); input->proto_v7_plus = proto_v7_plus; input->binary = binary; data_buffer = g_buffered_input_stream_peek_buffer (G_BUFFERED_INPUT_STREAM (request->data), &data_buffer_size); input->buffer = g_byte_array_sized_new (data_buffer_size); g_byte_array_append (input->buffer, data_buffer, data_buffer_size); input->output = broadway_output_new (g_io_stream_get_output_stream (G_IO_STREAM (request->connection)), 0, proto_v7_plus, binary); /* This will free and close the data input stream, but we got all the buffered content already */ http_request_free (request); in = g_io_stream_get_input_stream (G_IO_STREAM (input->connection)); input->source = g_pollable_input_stream_create_source (G_POLLABLE_INPUT_STREAM (in), NULL); g_source_set_callback (input->source, (GSourceFunc)input_data_cb, input, NULL); g_source_attach (input->source, NULL); if (input->server->password) { broadway_output_request_auth (input->output); broadway_output_flush (input->output); } else start (input); /* Process any data in the pipe already */ parse_input (input); g_strfreev (lines); } static void start (BroadwayInput *input) { BroadwayServer *server; input->active = TRUE; server = BROADWAY_SERVER (input->server); if (server->output) { broadway_output_disconnected (server->output); broadway_output_flush (server->output); } if (server->input != NULL) { broadway_input_free (server->input); server->input = NULL; } server->input = input; if (server->output) { server->saved_serial = broadway_output_get_next_serial (server->output); broadway_output_free (server->output); } server->output = input->output; broadway_output_set_next_serial (server->output, server->saved_serial); broadway_output_auth_ok (server->output); broadway_output_flush (server->output); broadway_server_resync_windows (server); if (server->pointer_grab_window_id != -1) broadway_output_grab_pointer (server->output, server->pointer_grab_window_id, server->pointer_grab_owner_events); process_input_messages (server); } static void send_data (HttpRequest *request, const char *mimetype, const char *data, gsize len) { char *res; res = g_strdup_printf ("HTTP/1.0 200 OK\r\n" "Content-Type: %s\r\n" "Content-Length: %"G_GSIZE_FORMAT"\r\n" "\r\n", mimetype, len); /* TODO: This should really be async */ g_output_stream_write_all (g_io_stream_get_output_stream (G_IO_STREAM (request->connection)), res, strlen (res), NULL, NULL, NULL); g_free (res); g_output_stream_write_all (g_io_stream_get_output_stream (G_IO_STREAM (request->connection)), data, len, NULL, NULL, NULL); http_request_free (request); } #include "clienthtml.h" #include "broadwayjs.h" static void got_request (HttpRequest *request) { char *start, *escaped, *tmp, *version, *query; if (!g_str_has_prefix (request->request->str, "GET ")) { send_error (request, 501, "Only GET implemented"); return; } start = request->request->str + 4; /* Skip "GET " */ while (*start == ' ') start++; for (tmp = start; *tmp != 0 && *tmp != ' ' && *tmp != '\n'; tmp++) ; escaped = g_strndup (start, tmp - start); version = NULL; if (*tmp == ' ') { start = tmp; while (*start == ' ') start++; for (tmp = start; *tmp != 0 && *tmp != ' ' && *tmp != '\n'; tmp++) ; version = g_strndup (start, tmp - start); } query = strchr (escaped, '?'); if (query) *query = 0; if (strcmp (escaped, "/client.html") == 0 || strcmp (escaped, "/") == 0) send_data (request, "text/html", client_html, G_N_ELEMENTS(client_html) - 1); else if (strcmp (escaped, "/broadway.js") == 0) send_data (request, "text/javascript", broadway_js, G_N_ELEMENTS(broadway_js) - 1); else if (strcmp (escaped, "/socket") == 0) start_input (request, FALSE); else if (strcmp (escaped, "/socket-bin") == 0) start_input (request, TRUE); else send_error (request, 404, "File not found"); g_free (escaped); g_free (version); } static void got_http_request_line (GInputStream *stream, GAsyncResult *result, HttpRequest *request) { char *line; line = g_data_input_stream_read_line_finish (G_DATA_INPUT_STREAM (stream), result, NULL, NULL); if (line == NULL) { http_request_free (request); g_printerr ("Error reading request lines\n"); return; } if (strlen (line) == 0) got_request (request); else { /* Protect against overflow in request length */ if (request->request->len > 1024 * 5) { send_error (request, 400, "Request too long"); } else { g_string_append_printf (request->request, "%s\n", line); g_data_input_stream_read_line_async (request->data, 0, NULL, (GAsyncReadyCallback)got_http_request_line, request); } } g_free (line); } static gboolean handle_incoming_connection (GSocketService *service, GSocketConnection *connection, GObject *source_object) { HttpRequest *request; GInputStream *in; request = g_new0 (HttpRequest, 1); request->connection = g_object_ref (connection); request->server = BROADWAY_SERVER (source_object); request->request = g_string_new (""); in = g_io_stream_get_input_stream (G_IO_STREAM (connection)); request->data = g_data_input_stream_new (in); g_filter_input_stream_set_close_base_stream (G_FILTER_INPUT_STREAM (request->data), FALSE); /* Be tolerant of input */ g_data_input_stream_set_newline_type (request->data, G_DATA_STREAM_NEWLINE_TYPE_ANY); g_data_input_stream_read_line_async (request->data, 0, NULL, (GAsyncReadyCallback)got_http_request_line, request); return TRUE; } BroadwayServer * broadway_server_new (char *address, int port, GError **error) { BroadwayServer *server; GInetAddress *inet_address; GSocketAddress *socket_address; server = g_object_new (BROADWAY_TYPE_SERVER, NULL); server->port = port; server->address = g_strdup (address); if (address == NULL) { if (!g_socket_listener_add_inet_port (G_SOCKET_LISTENER (server->service), server->port, G_OBJECT (server), error)) { g_prefix_error (error, "Unable to listen to port %d: ", server->port); return NULL; } } else { inet_address = g_inet_address_new_from_string (address); if (inet_address == NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_DATA, "Invalid ip address %s: ", address); return NULL; } socket_address = g_inet_socket_address_new (inet_address, port); g_object_unref (inet_address); if (!g_socket_listener_add_address (G_SOCKET_LISTENER (server->service), socket_address, G_SOCKET_TYPE_STREAM, G_SOCKET_PROTOCOL_TCP, G_OBJECT (server), NULL, error)) { g_prefix_error (error, "Unable to listen to %s:%d: ", server->address, server->port); g_object_unref (socket_address); return NULL; } g_object_unref (socket_address); } g_signal_connect (server->service, "incoming", G_CALLBACK (handle_incoming_connection), NULL); return server; } guint32 broadway_server_get_last_seen_time (BroadwayServer *server) { broadway_server_consume_all_input (server); return (guint32) server->last_seen_time; } void broadway_server_query_mouse (BroadwayServer *server, guint32 *toplevel, gint32 *root_x, gint32 *root_y, guint32 *mask) { if (server->output) { broadway_server_consume_all_input (server); if (root_x) *root_x = server->future_root_x; if (root_y) *root_y = server->future_root_y; if (mask) *mask = server->future_state; if (toplevel) *toplevel = server->future_mouse_in_toplevel; return; } /* Fallback when unconnected */ if (root_x) *root_x = server->last_x; if (root_y) *root_y = server->last_y; if (mask) *mask = server->last_state; if (toplevel) *toplevel = server->mouse_in_toplevel_id; } void broadway_server_destroy_window (BroadwayServer *server, gint id) { BroadwayWindow *window; if (server->mouse_in_toplevel_id == id) { /* TODO: Send leave + enter event, update cursors, etc */ server->mouse_in_toplevel_id = 0; } if (server->pointer_grab_window_id == id) server->pointer_grab_window_id = -1; if (server->output) broadway_output_destroy_surface (server->output, id); window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window != NULL) { server->toplevels = g_list_remove (server->toplevels, window); g_hash_table_remove (server->id_ht, GINT_TO_POINTER (id)); if (window->cached_surface_name != NULL) g_free (window->cached_surface_name); if (window->cached_surface != NULL) cairo_surface_destroy (window->cached_surface); g_free (window); } } gboolean broadway_server_window_show (BroadwayServer *server, gint id) { BroadwayWindow *window; gboolean sent = FALSE; window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window == NULL) return FALSE; window->visible = TRUE; if (server->output) { broadway_output_show_surface (server->output, window->id); sent = TRUE; } return sent; } gboolean broadway_server_window_hide (BroadwayServer *server, gint id) { BroadwayWindow *window; gboolean sent = FALSE; window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window == NULL) return FALSE; window->visible = FALSE; if (server->mouse_in_toplevel_id == id) { /* TODO: Send leave + enter event, update cursors, etc */ server->mouse_in_toplevel_id = 0; } if (server->pointer_grab_window_id == id) server->pointer_grab_window_id = -1; if (server->output) { broadway_output_hide_surface (server->output, window->id); sent = TRUE; } return sent; } void broadway_server_window_set_transient_for (BroadwayServer *server, gint id, gint parent) { BroadwayWindow *window; window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window == NULL) return; window->transient_for = parent; if (server->output) { broadway_output_set_transient_for (server->output, window->id, window->transient_for); broadway_server_flush (server); } } gboolean broadway_server_has_client (BroadwayServer *server) { return server->output != NULL; } static void _cairo_region (cairo_t *cr, const cairo_region_t *region) { cairo_rectangle_int_t box; gint n_boxes, i; g_return_if_fail (cr != NULL); g_return_if_fail (region != NULL); n_boxes = cairo_region_num_rectangles (region); for (i = 0; i < n_boxes; i++) { cairo_region_get_rectangle (region, i, &box); cairo_rectangle (cr, box.x, box.y, box.width, box.height); } } static void copy_region (cairo_surface_t *surface, cairo_region_t *area, gint dx, gint dy) { cairo_t *cr; cr = cairo_create (surface); cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); _cairo_region (cr, area); cairo_clip (cr); /* NB: This is a self-copy and Cairo doesn't support that yet. * So we do a litle trick. */ cairo_push_group (cr); cairo_set_source_surface (cr, surface, dx, dy); cairo_paint (cr); cairo_pop_group_to_source (cr); cairo_paint (cr); cairo_destroy (cr); } gboolean broadway_server_window_translate (BroadwayServer *server, gint id, cairo_region_t *area, gint dx, gint dy) { BroadwayWindow *window; gboolean sent = FALSE; window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window == NULL) return FALSE; if (window->last_synced && server->output) { BroadwayRect *rects; cairo_rectangle_int_t rect; int i, n_rects; copy_region (window->last_surface, area, dx, dy); n_rects = cairo_region_num_rectangles (area); rects = g_new (BroadwayRect, n_rects); for (i = 0; i < n_rects; i++) { cairo_region_get_rectangle (area, i, &rect); rects[i].x = rect.x; rects[i].y = rect.y; rects[i].width = rect.width; rects[i].height = rect.height; } broadway_output_copy_rectangles (server->output, window->id, rects, n_rects, dx, dy); g_free (rects); sent = TRUE; } return sent; } static void diff_surfaces (cairo_surface_t *surface, cairo_surface_t *old_surface) { guint8 *data, *old_data; guint32 *line, *old_line; int w, h, stride, old_stride; int x, y; data = cairo_image_surface_get_data (surface); old_data = cairo_image_surface_get_data (old_surface); w = cairo_image_surface_get_width (surface); h = cairo_image_surface_get_height (surface); stride = cairo_image_surface_get_stride (surface); old_stride = cairo_image_surface_get_stride (old_surface); for (y = 0; y < h; y++) { line = (guint32 *)data; old_line = (guint32 *)old_data; for (x = 0; x < w; x++) { if ((*line & 0xffffff) == (*old_line & 0xffffff)) *old_line = 0; else *old_line = *line | 0xff000000; line ++; old_line ++; } data += stride; old_data += old_stride; } } void broadway_server_window_update (BroadwayServer *server, gint id, cairo_surface_t *surface) { cairo_t *cr; BroadwayWindow *window; if (surface == NULL) return; window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window == NULL) return; if (window->last_surface == NULL) window->last_surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, window->width, window->height); g_assert (window->width == cairo_image_surface_get_width (window->last_surface)); g_assert (window->width == cairo_image_surface_get_width (surface)); g_assert (window->height == cairo_image_surface_get_height (window->last_surface)); g_assert (window->height == cairo_image_surface_get_height (surface)); if (server->output != NULL) { if (window->last_synced) { diff_surfaces (surface, window->last_surface); broadway_output_put_rgba (server->output, window->id, 0, 0, cairo_image_surface_get_width (window->last_surface), cairo_image_surface_get_height (window->last_surface), cairo_image_surface_get_stride (window->last_surface), cairo_image_surface_get_data (window->last_surface)); } else { window->last_synced = TRUE; broadway_output_put_rgb (server->output, window->id, 0, 0, cairo_image_surface_get_width (surface), cairo_image_surface_get_height (surface), cairo_image_surface_get_stride (surface), cairo_image_surface_get_data (surface)); } broadway_output_surface_flush (server->output, window->id); } cr = cairo_create (window->last_surface); cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); cairo_set_source_surface (cr, surface, 0, 0); cairo_paint (cr); cairo_destroy (cr); } gboolean broadway_server_window_move_resize (BroadwayServer *server, gint id, gboolean with_move, int x, int y, int width, int height) { BroadwayWindow *window; gboolean with_resize; gboolean sent = FALSE; cairo_t *cr; window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window == NULL) return FALSE; with_resize = width != window->width || height != window->height; window->width = width; window->height = height; if (with_resize && window->last_surface != NULL) { cairo_surface_t *old; old = window->last_surface; window->last_surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height); cr = cairo_create (window->last_surface); cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); cairo_set_source_surface (cr, old, 0, 0); cairo_paint (cr); cairo_destroy (cr); cairo_surface_destroy (old); } if (server->output != NULL) { broadway_output_move_resize_surface (server->output, window->id, with_move, x, y, with_resize, window->width, window->height); sent = TRUE; } else { if (with_move) { window->x = x; window->y = y; } fake_configure_notify (server, window); } return sent; } guint32 broadway_server_grab_pointer (BroadwayServer *server, gint client_id, gint id, gboolean owner_events, guint32 event_mask, guint32 time_) { if (server->pointer_grab_window_id != -1 && time_ != 0 && server->pointer_grab_time > time_) return GDK_GRAB_ALREADY_GRABBED; if (time_ == 0) time_ = server->last_seen_time; server->pointer_grab_window_id = id; server->pointer_grab_client_id = client_id; server->pointer_grab_owner_events = owner_events; server->pointer_grab_time = time_; if (server->output) { broadway_output_grab_pointer (server->output, id, owner_events); broadway_server_flush (server); } /* TODO: What about toplevel grab events if we're not connected? */ return GDK_GRAB_SUCCESS; } guint32 broadway_server_ungrab_pointer (BroadwayServer *server, guint32 time_) { guint32 serial; if (server->pointer_grab_window_id != -1 && time_ != 0 && server->pointer_grab_time > time_) return 0; /* TODO: What about toplevel grab events if we're not connected? */ if (server->output) { serial = broadway_output_ungrab_pointer (server->output); broadway_server_flush (server); } else { serial = server->saved_serial; } server->pointer_grab_window_id = -1; return serial; } static const cairo_user_data_key_t shm_cairo_key; typedef struct { void *data; gsize data_size; } ShmSurfaceData; static void shm_data_unmap (void *_data) { ShmSurfaceData *data = _data; munmap (data->data, data->data_size); g_free (data); } cairo_surface_t * broadway_server_open_surface (BroadwayServer *server, guint32 id, char *name, int width, int height) { BroadwayWindow *window; ShmSurfaceData *data; cairo_surface_t *surface; gsize size; void *ptr; int fd; window = g_hash_table_lookup (server->id_ht, GINT_TO_POINTER (id)); if (window == NULL) return NULL; if (window->cached_surface_name != NULL && strcmp (name, window->cached_surface_name) == 0) return cairo_surface_reference (window->cached_surface); size = width * height * sizeof (guint32); fd = shm_open(name, O_RDONLY, 0600); if (fd == -1) { perror ("Failed to shm_open"); return NULL; } ptr = mmap(0, size, PROT_READ, MAP_SHARED, fd, 0); (void) close(fd); shm_unlink (name); if (ptr == NULL) return NULL; data = g_new0 (ShmSurfaceData, 1); data->data = ptr; data->data_size = size; surface = cairo_image_surface_create_for_data ((guchar *)data->data, CAIRO_FORMAT_RGB24, width, height, width * sizeof (guint32)); g_assert (surface != NULL); cairo_surface_set_user_data (surface, &shm_cairo_key, data, shm_data_unmap); if (window->cached_surface_name != NULL) g_free (window->cached_surface_name); window->cached_surface_name = g_strdup (name); if (window->cached_surface != NULL) cairo_surface_destroy (window->cached_surface); window->cached_surface = cairo_surface_reference (surface); return surface; } guint32 broadway_server_new_window (BroadwayServer *server, int x, int y, int width, int height, gboolean is_temp) { BroadwayWindow *window; window = g_new0 (BroadwayWindow, 1); window->id = server->id_counter++; window->x = x; window->y = y; if (x == 0 && y == 0 && !is_temp) { /* TODO: Better way to know if we should pick default pos */ window->x = 100; window->y = 100; } window->width = width; window->height = height; window->is_temp = is_temp; g_hash_table_insert (server->id_ht, GINT_TO_POINTER (window->id), window); server->toplevels = g_list_prepend (server->toplevels, window); if (server->output) broadway_output_new_surface (server->output, window->id, window->x, window->y, window->width, window->height, window->is_temp); else fake_configure_notify (server, window); return window->id; } static void broadway_server_resync_windows (BroadwayServer *server) { GList *l; if (server->output == NULL) return; /* First create all windows */ for (l = server->toplevels; l != NULL; l = l->next) { BroadwayWindow *window = l->data; if (window->id == 0) continue; /* Skip root */ window->last_synced = FALSE; broadway_output_new_surface (server->output, window->id, window->x, window->y, window->width, window->height, window->is_temp); } /* Then do everything that may reference other windows */ for (l = server->toplevels; l != NULL; l = l->next) { BroadwayWindow *window = l->data; if (window->id == 0) continue; /* Skip root */ if (window->transient_for != -1) broadway_output_set_transient_for (server->output, window->id, window->transient_for); if (window->visible) { broadway_output_show_surface (server->output, window->id); if (window->last_surface != NULL) { window->last_synced = TRUE; broadway_output_put_rgb (server->output, window->id, 0, 0, cairo_image_surface_get_width (window->last_surface), cairo_image_surface_get_height (window->last_surface), cairo_image_surface_get_stride (window->last_surface), cairo_image_surface_get_data (window->last_surface)); } broadway_output_surface_flush (server->output, window->id); } } broadway_server_flush (server); }