ui/vdagent.c

   1 #include "qemu/osdep.h"
   2 #include "qapi/error.h"
   3 #include "chardev/char.h"
   4 #include "qemu/buffer.h"
   5 #include "qemu/error-report.h"
   6 #include "qemu/option.h"
   7 #include "qemu/units.h"
   8 #include "hw/qdev-core.h"
   9 #include "migration/blocker.h"
  10 #include "ui/clipboard.h"
  11 #include "ui/console.h"
  12 #include "ui/input.h"
  13 #include "trace.h"
  14
  15 #include "qapi/qapi-types-char.h"
  16 #include "qapi/qapi-types-ui.h"
  17
  18 #include "spice/vd_agent.h"
  19
  20 #define CHECK_SPICE_PROTOCOL_VERSION(major, minor, micro) \
  21     (CONFIG_SPICE_PROTOCOL_MAJOR > (major) ||             \
  22      (CONFIG_SPICE_PROTOCOL_MAJOR == (major) &&           \
  23       CONFIG_SPICE_PROTOCOL_MINOR > (minor)) ||           \
  24      (CONFIG_SPICE_PROTOCOL_MAJOR == (major) &&           \
  25       CONFIG_SPICE_PROTOCOL_MINOR == (minor) &&           \
  26       CONFIG_SPICE_PROTOCOL_MICRO >= (micro)))
  27
  28 #define VDAGENT_BUFFER_LIMIT (1 * MiB)
  29 #define VDAGENT_MOUSE_DEFAULT true
  30 #define VDAGENT_CLIPBOARD_DEFAULT false
  31
  32 struct VDAgentChardev {
  33     Chardev parent;
  34
  35     /* TODO: migration isn't yet supported */
  36     Error *migration_blocker;
  37
  38     /* config */
  39     bool mouse;
  40     bool clipboard;
  41
  42     /* guest vdagent */
  43     uint32_t caps;
  44     VDIChunkHeader chunk;
  45     uint32_t chunksize;
  46     uint8_t *msgbuf;
  47     uint32_t msgsize;
  48     uint8_t *xbuf;
  49     uint32_t xoff, xsize;
  50     Buffer outbuf;
  51
  52     /* mouse */
  53     DeviceState mouse_dev;
  54     uint32_t mouse_x;
  55     uint32_t mouse_y;
  56     uint32_t mouse_btn;
  57     uint32_t mouse_display;
  58     QemuInputHandlerState *mouse_hs;
  59
  60     /* clipboard */
  61     QemuClipboardPeer cbpeer;
  62     uint32_t last_serial[QEMU_CLIPBOARD_SELECTION__COUNT];
  63     uint32_t cbpending[QEMU_CLIPBOARD_SELECTION__COUNT];
  64 };
  65 typedef struct VDAgentChardev VDAgentChardev;
  66
  67 #define TYPE_CHARDEV_QEMU_VDAGENT "chardev-qemu-vdagent"
  68
  69 DECLARE_INSTANCE_CHECKER(VDAgentChardev, QEMU_VDAGENT_CHARDEV,
  70                          TYPE_CHARDEV_QEMU_VDAGENT);
  71
  72 /* ------------------------------------------------------------------ */
  73 /* names, for debug logging                                           */
  74
  75 static const char *cap_name[] = {
  76     [VD_AGENT_CAP_MOUSE_STATE]                    = "mouse-state",
  77     [VD_AGENT_CAP_MONITORS_CONFIG]                = "monitors-config",
  78     [VD_AGENT_CAP_REPLY]                          = "reply",
  79     [VD_AGENT_CAP_CLIPBOARD]                      = "clipboard",
  80     [VD_AGENT_CAP_DISPLAY_CONFIG]                 = "display-config",
  81     [VD_AGENT_CAP_CLIPBOARD_BY_DEMAND]            = "clipboard-by-demand",
  82     [VD_AGENT_CAP_CLIPBOARD_SELECTION]            = "clipboard-selection",
  83     [VD_AGENT_CAP_SPARSE_MONITORS_CONFIG]         = "sparse-monitors-config",
  84     [VD_AGENT_CAP_GUEST_LINEEND_LF]               = "guest-lineend-lf",
  85     [VD_AGENT_CAP_GUEST_LINEEND_CRLF]             = "guest-lineend-crlf",
  86     [VD_AGENT_CAP_MAX_CLIPBOARD]                  = "max-clipboard",
  87     [VD_AGENT_CAP_AUDIO_VOLUME_SYNC]              = "audio-volume-sync",
  88     [VD_AGENT_CAP_MONITORS_CONFIG_POSITION]       = "monitors-config-position",
  89     [VD_AGENT_CAP_FILE_XFER_DISABLED]             = "file-xfer-disabled",
  90     [VD_AGENT_CAP_FILE_XFER_DETAILED_ERRORS]      = "file-xfer-detailed-errors",
  91     [VD_AGENT_CAP_GRAPHICS_DEVICE_INFO]           = "graphics-device-info",
  92 #if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
  93     [VD_AGENT_CAP_CLIPBOARD_NO_RELEASE_ON_REGRAB] = "clipboard-no-release-on-regrab",
  94     [VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL]          = "clipboard-grab-serial",
  95 #endif
  96 };
  97
  98 static const char *msg_name[] = {
  99     [VD_AGENT_MOUSE_STATE]           = "mouse-state",
 100     [VD_AGENT_MONITORS_CONFIG]       = "monitors-config",
 101     [VD_AGENT_REPLY]                 = "reply",
 102     [VD_AGENT_CLIPBOARD]             = "clipboard",
 103     [VD_AGENT_DISPLAY_CONFIG]        = "display-config",
 104     [VD_AGENT_ANNOUNCE_CAPABILITIES] = "announce-capabilities",
 105     [VD_AGENT_CLIPBOARD_GRAB]        = "clipboard-grab",
 106     [VD_AGENT_CLIPBOARD_REQUEST]     = "clipboard-request",
 107     [VD_AGENT_CLIPBOARD_RELEASE]     = "clipboard-release",
 108     [VD_AGENT_FILE_XFER_START]       = "file-xfer-start",
 109     [VD_AGENT_FILE_XFER_STATUS]      = "file-xfer-status",
 110     [VD_AGENT_FILE_XFER_DATA]        = "file-xfer-data",
 111     [VD_AGENT_CLIENT_DISCONNECTED]   = "client-disconnected",
 112     [VD_AGENT_MAX_CLIPBOARD]         = "max-clipboard",
 113     [VD_AGENT_AUDIO_VOLUME_SYNC]     = "audio-volume-sync",
 114     [VD_AGENT_GRAPHICS_DEVICE_INFO]  = "graphics-device-info",
 115 };
 116
 117 static const char *sel_name[] = {
 118     [VD_AGENT_CLIPBOARD_SELECTION_CLIPBOARD] = "clipboard",
 119     [VD_AGENT_CLIPBOARD_SELECTION_PRIMARY]   = "primary",
 120     [VD_AGENT_CLIPBOARD_SELECTION_SECONDARY] = "secondary",
 121 };
 122
 123 static const char *type_name[] = {
 124     [VD_AGENT_CLIPBOARD_NONE]       = "none",
 125     [VD_AGENT_CLIPBOARD_UTF8_TEXT]  = "text",
 126     [VD_AGENT_CLIPBOARD_IMAGE_PNG]  = "png",
 127     [VD_AGENT_CLIPBOARD_IMAGE_BMP]  = "bmp",
 128     [VD_AGENT_CLIPBOARD_IMAGE_TIFF] = "tiff",
 129     [VD_AGENT_CLIPBOARD_IMAGE_JPG]  = "jpg",
 130 #if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 3)
 131     [VD_AGENT_CLIPBOARD_FILE_LIST]  = "files",
 132 #endif
 133 };
 134
 135 #define GET_NAME(_m, _v) \
 136     (((_v) < ARRAY_SIZE(_m) && (_m[_v])) ? (_m[_v]) : "???")
 137
 138 /* ------------------------------------------------------------------ */
 139 /* send messages                                                      */
 140
 141 static void vdagent_send_buf(VDAgentChardev *vd)
 142 {
 143     uint32_t len;
 144
 145     while (!buffer_empty(&vd->outbuf)) {
 146         len = qemu_chr_be_can_write(CHARDEV(vd));
 147         if (len == 0) {
 148             return;
 149         }
 150         if (len > vd->outbuf.offset) {
 151             len = vd->outbuf.offset;
 152         }
 153         qemu_chr_be_write(CHARDEV(vd), vd->outbuf.buffer, len);
 154         buffer_advance(&vd->outbuf, len);
 155     }
 156 }
 157
 158 static void vdagent_send_msg(VDAgentChardev *vd, VDAgentMessage *msg)
 159 {
 160     uint8_t *msgbuf = (void *)msg;
 161     uint32_t msgsize = sizeof(VDAgentMessage) + msg->size;
 162     uint32_t msgoff = 0;
 163     VDIChunkHeader chunk;
 164
 165     trace_vdagent_send(GET_NAME(msg_name, msg->type));
 166
 167     msg->protocol = VD_AGENT_PROTOCOL;
 168
 169     if (vd->outbuf.offset + msgsize > VDAGENT_BUFFER_LIMIT) {
 170         error_report("buffer full, dropping message");
 171         return;
 172     }
 173
 174     while (msgoff < msgsize) {
 175         chunk.port = VDP_CLIENT_PORT;
 176         chunk.size = msgsize - msgoff;
 177         if (chunk.size > 1024) {
 178             chunk.size = 1024;
 179         }
 180         buffer_reserve(&vd->outbuf, sizeof(chunk) + chunk.size);
 181         buffer_append(&vd->outbuf, &chunk, sizeof(chunk));
 182         buffer_append(&vd->outbuf, msgbuf + msgoff, chunk.size);
 183         msgoff += chunk.size;
 184     }
 185     vdagent_send_buf(vd);
 186 }
 187
 188 static void vdagent_send_caps(VDAgentChardev *vd)
 189 {
 190     g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
 191                                                sizeof(VDAgentAnnounceCapabilities) +
 192                                                sizeof(uint32_t));
 193     VDAgentAnnounceCapabilities *caps = (void *)msg->data;
 194
 195     msg->type = VD_AGENT_ANNOUNCE_CAPABILITIES;
 196     msg->size = sizeof(VDAgentAnnounceCapabilities) + sizeof(uint32_t);
 197     if (vd->mouse) {
 198         caps->caps[0] |= (1 << VD_AGENT_CAP_MOUSE_STATE);
 199     }
 200     if (vd->clipboard) {
 201         caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_BY_DEMAND);
 202         caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_SELECTION);
 203 #if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
 204         caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL);
 205 #endif
 206     }
 207
 208     vdagent_send_msg(vd, msg);
 209 }
 210
 211 /* ------------------------------------------------------------------ */
 212 /* mouse events                                                       */
 213
 214 static bool have_mouse(VDAgentChardev *vd)
 215 {
 216     return vd->mouse &&
 217         (vd->caps & (1 << VD_AGENT_CAP_MOUSE_STATE));
 218 }
 219
 220 static void vdagent_send_mouse(VDAgentChardev *vd)
 221 {
 222     g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
 223                                                sizeof(VDAgentMouseState));
 224     VDAgentMouseState *mouse = (void *)msg->data;
 225
 226     msg->type = VD_AGENT_MOUSE_STATE;
 227     msg->size = sizeof(VDAgentMouseState);
 228
 229     mouse->x          = vd->mouse_x;
 230     mouse->y          = vd->mouse_y;
 231     mouse->buttons    = vd->mouse_btn;
 232     mouse->display_id = vd->mouse_display;
 233
 234     vdagent_send_msg(vd, msg);
 235 }
 236
 237 static void vdagent_pointer_event(DeviceState *dev, QemuConsole *src,
 238                                   InputEvent *evt)
 239 {
 240     static const int bmap[INPUT_BUTTON__MAX] = {
 241         [INPUT_BUTTON_LEFT]        = VD_AGENT_LBUTTON_MASK,
 242         [INPUT_BUTTON_RIGHT]       = VD_AGENT_RBUTTON_MASK,
 243         [INPUT_BUTTON_MIDDLE]      = VD_AGENT_MBUTTON_MASK,
 244         [INPUT_BUTTON_WHEEL_UP]    = VD_AGENT_UBUTTON_MASK,
 245         [INPUT_BUTTON_WHEEL_DOWN]  = VD_AGENT_DBUTTON_MASK,
 246 #ifdef VD_AGENT_EBUTTON_MASK
 247         [INPUT_BUTTON_SIDE]        = VD_AGENT_SBUTTON_MASK,
 248         [INPUT_BUTTON_EXTRA]       = VD_AGENT_EBUTTON_MASK,
 249 #endif
 250     };
 251
 252     VDAgentChardev *vd = container_of(dev, struct VDAgentChardev, mouse_dev);
 253     InputMoveEvent *move;
 254     InputBtnEvent *btn;
 255     uint32_t xres, yres;
 256
 257     switch (evt->type) {
 258     case INPUT_EVENT_KIND_ABS:
 259         move = evt->u.abs.data;
 260         xres = qemu_console_get_width(src, 1024);
 261         yres = qemu_console_get_height(src, 768);
 262         if (move->axis == INPUT_AXIS_X) {
 263             vd->mouse_x = qemu_input_scale_axis(move->value,
 264                                                 INPUT_EVENT_ABS_MIN,
 265                                                 INPUT_EVENT_ABS_MAX,
 266                                                 0, xres);
 267         } else if (move->axis == INPUT_AXIS_Y) {
 268             vd->mouse_y = qemu_input_scale_axis(move->value,
 269                                                 INPUT_EVENT_ABS_MIN,
 270                                                 INPUT_EVENT_ABS_MAX,
 271                                                 0, yres);
 272         }
 273         vd->mouse_display = qemu_console_get_index(src);
 274         break;
 275
 276     case INPUT_EVENT_KIND_BTN:
 277         btn = evt->u.btn.data;
 278         if (btn->down) {
 279             vd->mouse_btn |= bmap[btn->button];
 280         } else {
 281             vd->mouse_btn &= ~bmap[btn->button];
 282         }
 283         break;
 284
 285     default:
 286         /* keep gcc happy */
 287         break;
 288     }
 289 }
 290
 291 static void vdagent_pointer_sync(DeviceState *dev)
 292 {
 293     VDAgentChardev *vd = container_of(dev, struct VDAgentChardev, mouse_dev);
 294
 295     if (vd->caps & (1 << VD_AGENT_CAP_MOUSE_STATE)) {
 296         vdagent_send_mouse(vd);
 297     }
 298 }
 299
 300 static QemuInputHandler vdagent_mouse_handler = {
 301     .name  = "vdagent mouse",
 302     .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
 303     .event = vdagent_pointer_event,
 304     .sync  = vdagent_pointer_sync,
 305 };
 306
 307 /* ------------------------------------------------------------------ */
 308 /* clipboard                                                          */
 309
 310 static bool have_clipboard(VDAgentChardev *vd)
 311 {
 312     return vd->clipboard &&
 313         (vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_BY_DEMAND));
 314 }
 315
 316 static bool have_selection(VDAgentChardev *vd)
 317 {
 318     return vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_SELECTION);
 319 }
 320
 321 static uint32_t type_qemu_to_vdagent(enum QemuClipboardType type)
 322 {
 323     switch (type) {
 324     case QEMU_CLIPBOARD_TYPE_TEXT:
 325         return VD_AGENT_CLIPBOARD_UTF8_TEXT;
 326     default:
 327         return VD_AGENT_CLIPBOARD_NONE;
 328     }
 329 }
 330
 331 static void vdagent_send_clipboard_grab(VDAgentChardev *vd,
 332                                         QemuClipboardInfo *info)
 333 {
 334     g_autofree VDAgentMessage *msg =
 335         g_malloc0(sizeof(VDAgentMessage) +
 336                   sizeof(uint32_t) * (QEMU_CLIPBOARD_TYPE__COUNT + 1) +
 337                   sizeof(uint32_t));
 338     uint8_t *s = msg->data;
 339     uint32_t *data = (uint32_t *)msg->data;
 340     uint32_t q, type;
 341
 342     if (have_selection(vd)) {
 343         *s = info->selection;
 344         data++;
 345         msg->size += sizeof(uint32_t);
 346     } else if (info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
 347         return;
 348     }
 349
 350 #if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
 351     if (vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL)) {
 352         if (!info->has_serial) {
 353             /* client should win */
 354             info->serial = vd->last_serial[info->selection]++;
 355             info->has_serial = true;
 356         }
 357         *data = info->serial;
 358         data++;
 359         msg->size += sizeof(uint32_t);
 360     }
 361 #endif
 362
 363     for (q = 0; q < QEMU_CLIPBOARD_TYPE__COUNT; q++) {
 364         type = type_qemu_to_vdagent(q);
 365         if (type != VD_AGENT_CLIPBOARD_NONE && info->types[q].available) {
 366             *data = type;
 367             data++;
 368             msg->size += sizeof(uint32_t);
 369         }
 370     }
 371
 372     msg->type = VD_AGENT_CLIPBOARD_GRAB;
 373     vdagent_send_msg(vd, msg);
 374 }
 375
 376 static void vdagent_send_clipboard_release(VDAgentChardev *vd,
 377                                            QemuClipboardInfo *info)
 378 {
 379     g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
 380                                                sizeof(uint32_t));
 381
 382     if (have_selection(vd)) {
 383         uint8_t *s = msg->data;
 384         *s = info->selection;
 385         msg->size += sizeof(uint32_t);
 386     } else if (info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
 387         return;
 388     }
 389
 390     msg->type = VD_AGENT_CLIPBOARD_RELEASE;
 391     vdagent_send_msg(vd, msg);
 392 }
 393
 394 static void vdagent_send_clipboard_data(VDAgentChardev *vd,
 395                                         QemuClipboardInfo *info,
 396                                         QemuClipboardType type)
 397 {
 398     g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
 399                                                sizeof(uint32_t) * 2 +
 400                                                info->types[type].size);
 401
 402     uint8_t *s = msg->data;
 403     uint32_t *data = (uint32_t *)msg->data;
 404
 405     if (have_selection(vd)) {
 406         *s = info->selection;
 407         data++;
 408         msg->size += sizeof(uint32_t);
 409     } else if (info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
 410         return;
 411     }
 412
 413     *data = type_qemu_to_vdagent(type);
 414     data++;
 415     msg->size += sizeof(uint32_t);
 416
 417     memcpy(data, info->types[type].data, info->types[type].size);
 418     msg->size += info->types[type].size;
 419
 420     msg->type = VD_AGENT_CLIPBOARD;
 421     vdagent_send_msg(vd, msg);
 422 }
 423
 424 static void vdagent_send_empty_clipboard_data(VDAgentChardev *vd,
 425                                               QemuClipboardSelection selection,
 426                                               QemuClipboardType type)
 427 {
 428     g_autoptr(QemuClipboardInfo) info = qemu_clipboard_info_new(&vd->cbpeer, selection);
 429
 430     trace_vdagent_send_empty_clipboard();
 431     vdagent_send_clipboard_data(vd, info, type);
 432 }
 433
 434 static void vdagent_clipboard_update_info(VDAgentChardev *vd,
 435                                           QemuClipboardInfo *info)
 436 {
 437     QemuClipboardSelection s = info->selection;
 438     QemuClipboardType type;
 439     bool self_update = info->owner == &vd->cbpeer;
 440
 441     if (info != qemu_clipboard_info(s)) {
 442         vd->cbpending[s] = 0;
 443         if (!self_update) {
 444             if (info->owner) {
 445                 vdagent_send_clipboard_grab(vd, info);
 446             } else {
 447                 vdagent_send_clipboard_release(vd, info);
 448             }
 449         }
 450         return;
 451     }
 452
 453     if (self_update) {
 454         return;
 455     }
 456
 457     for (type = 0; type < QEMU_CLIPBOARD_TYPE__COUNT; type++) {
 458         if (vd->cbpending[s] & (1 << type)) {
 459             vd->cbpending[s] &= ~(1 << type);
 460             vdagent_send_clipboard_data(vd, info, type);
 461         }
 462     }
 463 }
 464
 465 static void vdagent_clipboard_reset_serial(VDAgentChardev *vd)
 466 {
 467     Chardev *chr = CHARDEV(vd);
 468
 469     /* reopen the agent connection to reset the serial state */
 470     qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
 471     /* OPENED again after the guest disconnected, see set_fe_open */
 472 }
 473
 474 static void vdagent_clipboard_notify(Notifier *notifier, void *data)
 475 {
 476     VDAgentChardev *vd =
 477         container_of(notifier, VDAgentChardev, cbpeer.notifier);
 478     QemuClipboardNotify *notify = data;
 479
 480     switch (notify->type) {
 481     case QEMU_CLIPBOARD_UPDATE_INFO:
 482         vdagent_clipboard_update_info(vd, notify->info);
 483         return;
 484     case QEMU_CLIPBOARD_RESET_SERIAL:
 485         vdagent_clipboard_reset_serial(vd);
 486         return;
 487     }
 488 }
 489
 490 static void vdagent_clipboard_request(QemuClipboardInfo *info,
 491                                       QemuClipboardType qtype)
 492 {
 493     VDAgentChardev *vd = container_of(info->owner, VDAgentChardev, cbpeer);
 494     g_autofree VDAgentMessage *msg = g_malloc0(sizeof(VDAgentMessage) +
 495                                                sizeof(uint32_t) * 2);
 496     uint32_t type = type_qemu_to_vdagent(qtype);
 497     uint8_t *s = msg->data;
 498     uint32_t *data = (uint32_t *)msg->data;
 499
 500     if (type == VD_AGENT_CLIPBOARD_NONE) {
 501         return;
 502     }
 503
 504     if (have_selection(vd)) {
 505         *s = info->selection;
 506         data++;
 507         msg->size += sizeof(uint32_t);
 508     }
 509
 510     *data = type;
 511     msg->size += sizeof(uint32_t);
 512
 513     msg->type = VD_AGENT_CLIPBOARD_REQUEST;
 514     vdagent_send_msg(vd, msg);
 515 }
 516
 517 static void vdagent_clipboard_recv_grab(VDAgentChardev *vd, uint8_t s, uint32_t size, void *data)
 518 {
 519     g_autoptr(QemuClipboardInfo) info = NULL;
 520
 521     trace_vdagent_cb_grab_selection(GET_NAME(sel_name, s));
 522     info = qemu_clipboard_info_new(&vd->cbpeer, s);
 523 #if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
 524     if (vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL)) {
 525         if (size < sizeof(uint32_t)) {
 526             /* this shouldn't happen! */
 527             return;
 528         }
 529
 530         info->has_serial = true;
 531         info->serial = *(uint32_t *)data;
 532         if (info->serial < vd->last_serial[s]) {
 533             trace_vdagent_cb_grab_discard(GET_NAME(sel_name, s),
 534                                           vd->last_serial[s], info->serial);
 535             /* discard lower-ordering guest grab */
 536             return;
 537         }
 538         vd->last_serial[s] = info->serial;
 539         data += sizeof(uint32_t);
 540         size -= sizeof(uint32_t);
 541     }
 542 #endif
 543     if (size > sizeof(uint32_t) * 10) {
 544         /*
 545          * spice has 6 types as of 2021. Limiting to 10 entries
 546          * so we have some wiggle room.
 547          */
 548         return;
 549     }
 550     while (size >= sizeof(uint32_t)) {
 551         trace_vdagent_cb_grab_type(GET_NAME(type_name, *(uint32_t *)data));
 552         switch (*(uint32_t *)data) {
 553         case VD_AGENT_CLIPBOARD_UTF8_TEXT:
 554             info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true;
 555             break;
 556         default:
 557             break;
 558         }
 559         data += sizeof(uint32_t);
 560         size -= sizeof(uint32_t);
 561     }
 562     qemu_clipboard_update(info);
 563 }
 564
 565 static void vdagent_clipboard_recv_request(VDAgentChardev *vd, uint8_t s, uint32_t size, void *data)
 566 {
 567     QemuClipboardType type;
 568     QemuClipboardInfo *info;
 569
 570     if (size < sizeof(uint32_t)) {
 571         return;
 572     }
 573     switch (*(uint32_t *)data) {
 574     case VD_AGENT_CLIPBOARD_UTF8_TEXT:
 575         type = QEMU_CLIPBOARD_TYPE_TEXT;
 576         break;
 577     default:
 578         return;
 579     }
 580
 581     info = qemu_clipboard_info(s);
 582     if (info && info->types[type].available && info->owner != &vd->cbpeer) {
 583         if (info->types[type].data) {
 584             vdagent_send_clipboard_data(vd, info, type);
 585         } else {
 586             vd->cbpending[s] |= (1 << type);
 587             qemu_clipboard_request(info, type);
 588         }
 589     } else {
 590         vdagent_send_empty_clipboard_data(vd, s, type);
 591     }
 592 }
 593
 594 static void vdagent_clipboard_recv_data(VDAgentChardev *vd, uint8_t s, uint32_t size, void *data)
 595 {
 596     QemuClipboardType type;
 597
 598     if (size < sizeof(uint32_t)) {
 599         return;
 600     }
 601     switch (*(uint32_t *)data) {
 602     case VD_AGENT_CLIPBOARD_UTF8_TEXT:
 603         type = QEMU_CLIPBOARD_TYPE_TEXT;
 604         break;
 605     default:
 606         return;
 607     }
 608     data += 4;
 609     size -= 4;
 610
 611     if (qemu_clipboard_peer_owns(&vd->cbpeer, s)) {
 612         qemu_clipboard_set_data(&vd->cbpeer, qemu_clipboard_info(s),
 613                                 type, size, data, true);
 614     }
 615 }
 616
 617 static void vdagent_clipboard_recv_release(VDAgentChardev *vd, uint8_t s)
 618 {
 619     qemu_clipboard_peer_release(&vd->cbpeer, s);
 620 }
 621
 622 static void vdagent_chr_recv_clipboard(VDAgentChardev *vd, VDAgentMessage *msg)
 623 {
 624     uint8_t s = VD_AGENT_CLIPBOARD_SELECTION_CLIPBOARD;
 625     uint32_t size = msg->size;
 626     void *data = msg->data;
 627
 628     if (have_selection(vd)) {
 629         if (size < 4) {
 630             return;
 631         }
 632         s = *(uint8_t *)data;
 633         if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) {
 634             return;
 635         }
 636         data += 4;
 637         size -= 4;
 638     }
 639
 640     switch (msg->type) {
 641     case VD_AGENT_CLIPBOARD_GRAB:
 642         return vdagent_clipboard_recv_grab(vd, s, size, data);
 643     case VD_AGENT_CLIPBOARD_REQUEST:
 644         return vdagent_clipboard_recv_request(vd, s, size, data);
 645     case VD_AGENT_CLIPBOARD: /* data */
 646         return vdagent_clipboard_recv_data(vd, s, size, data);
 647     case VD_AGENT_CLIPBOARD_RELEASE:
 648         return vdagent_clipboard_recv_release(vd, s);
 649     default:
 650         g_assert_not_reached();
 651     }
 652 }
 653
 654 /* ------------------------------------------------------------------ */
 655 /* chardev backend                                                    */
 656
 657 static void vdagent_chr_open(Chardev *chr,
 658                              ChardevBackend *backend,
 659                              bool *be_opened,
 660                              Error **errp)
 661 {
 662     VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
 663     ChardevQemuVDAgent *cfg = backend->u.qemu_vdagent.data;
 664
 665 #if HOST_BIG_ENDIAN
 666     /*
 667      * TODO: vdagent protocol is defined to be LE,
 668      * so we have to byteswap everything on BE hosts.
 669      */
 670     error_setg(errp, "vdagent is not supported on bigendian hosts");
 671     return;
 672 #endif
 673
 674     if (migrate_add_blocker(vd->migration_blocker, errp) != 0) {
 675         return;
 676     }
 677
 678     vd->mouse = VDAGENT_MOUSE_DEFAULT;
 679     if (cfg->has_mouse) {
 680         vd->mouse = cfg->mouse;
 681     }
 682
 683     vd->clipboard = VDAGENT_CLIPBOARD_DEFAULT;
 684     if (cfg->has_clipboard) {
 685         vd->clipboard = cfg->clipboard;
 686     }
 687
 688     if (vd->mouse) {
 689         vd->mouse_hs = qemu_input_handler_register(&vd->mouse_dev,
 690                                                    &vdagent_mouse_handler);
 691     }
 692
 693     *be_opened = true;
 694 }
 695
 696 static void vdagent_chr_recv_caps(VDAgentChardev *vd, VDAgentMessage *msg)
 697 {
 698     VDAgentAnnounceCapabilities *caps = (void *)msg->data;
 699     int i;
 700
 701     if (msg->size < (sizeof(VDAgentAnnounceCapabilities) +
 702                      sizeof(uint32_t))) {
 703         return;
 704     }
 705
 706     for (i = 0; i < ARRAY_SIZE(cap_name); i++) {
 707         if (caps->caps[0] & (1 << i)) {
 708             trace_vdagent_peer_cap(GET_NAME(cap_name, i));
 709         }
 710     }
 711
 712     vd->caps = caps->caps[0];
 713     if (caps->request) {
 714         vdagent_send_caps(vd);
 715     }
 716     if (have_mouse(vd) && vd->mouse_hs) {
 717         qemu_input_handler_activate(vd->mouse_hs);
 718     }
 719
 720     memset(vd->last_serial, 0, sizeof(vd->last_serial));
 721
 722     if (have_clipboard(vd) && vd->cbpeer.notifier.notify == NULL) {
 723         vd->cbpeer.name = "vdagent";
 724         vd->cbpeer.notifier.notify = vdagent_clipboard_notify;
 725         vd->cbpeer.request = vdagent_clipboard_request;
 726         qemu_clipboard_peer_register(&vd->cbpeer);
 727     }
 728 }
 729
 730 static void vdagent_chr_recv_msg(VDAgentChardev *vd, VDAgentMessage *msg)
 731 {
 732     trace_vdagent_recv_msg(GET_NAME(msg_name, msg->type), msg->size);
 733
 734     switch (msg->type) {
 735     case VD_AGENT_ANNOUNCE_CAPABILITIES:
 736         vdagent_chr_recv_caps(vd, msg);
 737         break;
 738     case VD_AGENT_CLIPBOARD:
 739     case VD_AGENT_CLIPBOARD_GRAB:
 740     case VD_AGENT_CLIPBOARD_REQUEST:
 741     case VD_AGENT_CLIPBOARD_RELEASE:
 742         if (have_clipboard(vd)) {
 743             vdagent_chr_recv_clipboard(vd, msg);
 744         }
 745         break;
 746     default:
 747         break;
 748     }
 749 }
 750
 751 static void vdagent_reset_xbuf(VDAgentChardev *vd)
 752 {
 753     g_clear_pointer(&vd->xbuf, g_free);
 754     vd->xoff = 0;
 755     vd->xsize = 0;
 756 }
 757
 758 static void vdagent_chr_recv_chunk(VDAgentChardev *vd)
 759 {
 760     VDAgentMessage *msg = (void *)vd->msgbuf;
 761
 762     if (!vd->xsize) {
 763         if (vd->msgsize < sizeof(*msg)) {
 764             error_report("%s: message too small: %d < %zd", __func__,
 765                          vd->msgsize, sizeof(*msg));
 766             return;
 767         }
 768         if (vd->msgsize == msg->size + sizeof(*msg)) {
 769             vdagent_chr_recv_msg(vd, msg);
 770             return;
 771         }
 772     }
 773
 774     if (!vd->xsize) {
 775         vd->xsize = msg->size + sizeof(*msg);
 776         vd->xbuf = g_malloc0(vd->xsize);
 777     }
 778
 779     if (vd->xoff + vd->msgsize > vd->xsize) {
 780         error_report("%s: Oops: %d+%d > %d", __func__,
 781                      vd->xoff, vd->msgsize, vd->xsize);
 782         vdagent_reset_xbuf(vd);
 783         return;
 784     }
 785
 786     memcpy(vd->xbuf + vd->xoff, vd->msgbuf, vd->msgsize);
 787     vd->xoff += vd->msgsize;
 788     if (vd->xoff < vd->xsize) {
 789         return;
 790     }
 791
 792     msg = (void *)vd->xbuf;
 793     vdagent_chr_recv_msg(vd, msg);
 794     vdagent_reset_xbuf(vd);
 795 }
 796
 797 static void vdagent_reset_bufs(VDAgentChardev *vd)
 798 {
 799     memset(&vd->chunk, 0, sizeof(vd->chunk));
 800     vd->chunksize = 0;
 801     g_free(vd->msgbuf);
 802     vd->msgbuf = NULL;
 803     vd->msgsize = 0;
 804 }
 805
 806 static int vdagent_chr_write(Chardev *chr, const uint8_t *buf, int len)
 807 {
 808     VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
 809     uint32_t copy, ret = len;
 810
 811     while (len) {
 812         if (vd->chunksize < sizeof(vd->chunk)) {
 813             copy = sizeof(vd->chunk) - vd->chunksize;
 814             if (copy > len) {
 815                 copy = len;
 816             }
 817             memcpy((void *)(&vd->chunk) + vd->chunksize, buf, copy);
 818             vd->chunksize += copy;
 819             buf += copy;
 820             len -= copy;
 821             if (vd->chunksize < sizeof(vd->chunk)) {
 822                 break;
 823             }
 824
 825             assert(vd->msgbuf == NULL);
 826             vd->msgbuf = g_malloc0(vd->chunk.size);
 827         }
 828
 829         copy = vd->chunk.size - vd->msgsize;
 830         if (copy > len) {
 831             copy = len;
 832         }
 833         memcpy(vd->msgbuf + vd->msgsize, buf, copy);
 834         vd->msgsize += copy;
 835         buf += copy;
 836         len -= copy;
 837
 838         if (vd->msgsize == vd->chunk.size) {
 839             trace_vdagent_recv_chunk(vd->chunk.size);
 840             vdagent_chr_recv_chunk(vd);
 841             vdagent_reset_bufs(vd);
 842         }
 843     }
 844
 845     return ret;
 846 }
 847
 848 static void vdagent_chr_accept_input(Chardev *chr)
 849 {
 850     VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
 851
 852     vdagent_send_buf(vd);
 853 }
 854
 855 static void vdagent_disconnect(VDAgentChardev *vd)
 856 {
 857     trace_vdagent_disconnect();
 858
 859     buffer_reset(&vd->outbuf);
 860     vdagent_reset_bufs(vd);
 861     vd->caps = 0;
 862     if (vd->mouse_hs) {
 863         qemu_input_handler_deactivate(vd->mouse_hs);
 864     }
 865     if (vd->cbpeer.notifier.notify) {
 866         qemu_clipboard_peer_unregister(&vd->cbpeer);
 867         memset(&vd->cbpeer, 0, sizeof(vd->cbpeer));
 868     }
 869 }
 870
 871 static void vdagent_chr_set_fe_open(struct Chardev *chr, int fe_open)
 872 {
 873     if (!fe_open) {
 874         trace_vdagent_close();
 875         /* To reset_serial, we CLOSED our side. Make sure the other end knows we
 876          * are ready again. */
 877         qemu_chr_be_event(chr, CHR_EVENT_OPENED);
 878         return;
 879     }
 880
 881     trace_vdagent_open();
 882 }
 883
 884 static void vdagent_chr_parse(QemuOpts *opts, ChardevBackend *backend,
 885                               Error **errp)
 886 {
 887     ChardevQemuVDAgent *cfg;
 888
 889     backend->type = CHARDEV_BACKEND_KIND_QEMU_VDAGENT;
 890     cfg = backend->u.qemu_vdagent.data = g_new0(ChardevQemuVDAgent, 1);
 891     qemu_chr_parse_common(opts, qapi_ChardevQemuVDAgent_base(cfg));
 892     cfg->has_mouse = true;
 893     cfg->mouse = qemu_opt_get_bool(opts, "mouse", VDAGENT_MOUSE_DEFAULT);
 894     cfg->has_clipboard = true;
 895     cfg->clipboard = qemu_opt_get_bool(opts, "clipboard", VDAGENT_CLIPBOARD_DEFAULT);
 896 }
 897
 898 /* ------------------------------------------------------------------ */
 899
 900 static void vdagent_chr_class_init(ObjectClass *oc, void *data)
 901 {
 902     ChardevClass *cc = CHARDEV_CLASS(oc);
 903
 904     cc->parse            = vdagent_chr_parse;
 905     cc->open             = vdagent_chr_open;
 906     cc->chr_write        = vdagent_chr_write;
 907     cc->chr_set_fe_open  = vdagent_chr_set_fe_open;
 908     cc->chr_accept_input = vdagent_chr_accept_input;
 909 }
 910
 911 static void vdagent_chr_init(Object *obj)
 912 {
 913     VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj);
 914
 915     buffer_init(&vd->outbuf, "vdagent-outbuf");
 916     error_setg(&vd->migration_blocker,
 917                "The vdagent chardev doesn't yet support migration");
 918 }
 919
 920 static void vdagent_chr_fini(Object *obj)
 921 {
 922     VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj);
 923
 924     migrate_del_blocker(vd->migration_blocker);
 925     vdagent_disconnect(vd);
 926     buffer_free(&vd->outbuf);
 927     error_free(vd->migration_blocker);
 928 }
 929
 930 static const TypeInfo vdagent_chr_type_info = {
 931     .name = TYPE_CHARDEV_QEMU_VDAGENT,
 932     .parent = TYPE_CHARDEV,
 933     .instance_size = sizeof(VDAgentChardev),
 934     .instance_init = vdagent_chr_init,
 935     .instance_finalize = vdagent_chr_fini,
 936     .class_init = vdagent_chr_class_init,
 937 };
 938
 939 static void register_types(void)
 940 {
 941     type_register_static(&vdagent_chr_type_info);
 942 }
 943
 944 type_init(register_types);