/* See LICENSE file for copyright and license details. */
#include "common.h"
static const char *const req_formats[] = {
/*
* . = 1 unused byte
* , = 2 unused bytes
* _ = 3 unused bytes
* ! = libaxl_bool_t
* 1 = uint8_t
* 2 = uint16_t
* 4 = uint32_t
* z = int8_t
* s = int16_t
* S = int32_t
* $ = previous marked length, in units
* % = previous marked format, in bits
* @ = non-encoded size_t length marked, align input to (size_t)
* u = STRING8, align input to (void *) and enter
* U = STRING16, align input to (void *) and enter
* d = data, uses %, align input to (void *) and enter
* e = event, align input to (union libaxl_event)
* ? = jump to special encoding routine
* * = following are repeated, align input to (void *) and enter
* | = following are included and encoded as uint32_t if corresponding bit is set in previous
*
* The bytes 2–3 (starting at 0) are ignored here because its
* the length field and will be filled in by the function
*/
[LIBAXL_REQUEST_CREATE_WINDOW] = "11,44ss222244|4444111.44!!,4444",
[LIBAXL_REQUEST_CHANGE_WINDOW_ATTRIBUTES] = "1_44|4444111.44111.44!!,4444",
[LIBAXL_REQUEST_GET_WINDOW_ATTRIBUTES] = "1_4",
[LIBAXL_REQUEST_DESTROY_WINDOW] = "1_4",
[LIBAXL_REQUEST_DESTROY_SUBWINDOWS] = "1_4",
[LIBAXL_REQUEST_CHANGE_SAVE_SET] = "11,4",
[LIBAXL_REQUEST_REPARENT_WINDOW] = "1_44ss",
[LIBAXL_REQUEST_MAP_WINDOW] = "1_4",
[LIBAXL_REQUEST_MAP_SUBWINDOWS] = "1_4",
[LIBAXL_REQUEST_UNMAP_WINDOW] = "1_4",
[LIBAXL_REQUEST_UNMAP_SUBWINDOWS] = "1_4",
[LIBAXL_REQUEST_CONFIGURE_WINDOW] = "1_42|,ss222,1",
[LIBAXL_REQUEST_CIRCULATE_WINDOW] = "11,4",
[LIBAXL_REQUEST_GET_GEOMETRY] = "1_4",
[LIBAXL_REQUEST_QUERY_TREE] = "1_4",
[LIBAXL_REQUEST_INTERN_ATOM] = "1!,2$,u",
[LIBAXL_REQUEST_GET_ATOM_NAME] = "1_4",
[LIBAXL_REQUEST_CHANGE_PROPERTY] = "11,4441%_4$d",
[LIBAXL_REQUEST_DELETE_PROPERTY] = "11,44",
[LIBAXL_REQUEST_GET_PROPERTY] = "1_44444",
[LIBAXL_REQUEST_LIST_PROPERTIES] = "1_4",
[LIBAXL_REQUEST_SET_SELECTION_OWNER] = "1_444",
[LIBAXL_REQUEST_GET_SELECTION_OWNER] = "1_4",
[LIBAXL_REQUEST_CONVERT_SELECTION] = "1_4444",
[LIBAXL_REQUEST_SEND_EVENT] = "1!,44e",
[LIBAXL_REQUEST_GRAB_POINTER] = "1!,4211444",
[LIBAXL_REQUEST_UNGRAB_POINTER] = "1_4",
[LIBAXL_REQUEST_GRAB_BUTTON] = "1_4211441.2",
[LIBAXL_REQUEST_UNGRAB_BUTTON] = "11,42,",
[LIBAXL_REQUEST_CHANGE_ACTIVE_POINTER_GRAB] = "1_442,",
[LIBAXL_REQUEST_GRAB_KEYBOARD] = "1!,4411,",
[LIBAXL_REQUEST_UNGRAB_KEYBOARD] = "1_4",
[LIBAXL_REQUEST_GRAB_KEY] = "1!,42111_",
[LIBAXL_REQUEST_UNGRAB_KEY] = "11,42,",
[LIBAXL_REQUEST_ALLOW_EVENTS] = "11,4",
[LIBAXL_REQUEST_GRAB_SERVER] = "1_",
[LIBAXL_REQUEST_UNGRAB_SERVER] = "1_",
[LIBAXL_REQUEST_QUERY_POINTER] = "1_4",
[LIBAXL_REQUEST_GET_MOTION_EVENTS] = "1_444",
[LIBAXL_REQUEST_TRANSLATE_COORDINATES] = "1_44ss",
[LIBAXL_REQUEST_WARP_POINTER] = "1_44ss22ss",
[LIBAXL_REQUEST_SET_INPUT_FOCUS] = "11,44",
[LIBAXL_REQUEST_GET_INPUT_FOCUS] = "1_",
[LIBAXL_REQUEST_QUERY_KEYMAP] = "1_",
[LIBAXL_REQUEST_OPEN_FONT] = "1_42$,u",
[LIBAXL_REQUEST_CLOSE_FONT] = "1_4",
[LIBAXL_REQUEST_QUERY_FONT] = "1_4",
[LIBAXL_REQUEST_QUERY_TEXT_EXTENTS] = "1_4@?U",
[LIBAXL_REQUEST_LIST_FONTS] = "1_22$u",
[LIBAXL_REQUEST_LIST_FONTS_WITH_INFO] = "1_22$u",
[LIBAXL_REQUEST_SET_FONT_PATH] = "1_2$,*1$u",
[LIBAXL_REQUEST_GET_FONT_PATH] = "1_",
[LIBAXL_REQUEST_CREATE_PIXMAP] = "11,4422",
[LIBAXL_REQUEST_FREE_PIXMAP] = "11,4",
[LIBAXL_REQUEST_CREATE_GC] = "1_444|1_444211111.44ss41!,ss4211",
[LIBAXL_REQUEST_CHANGE_GC] = "1_44|1_444211111.44ss41!,ss4211",
[LIBAXL_REQUEST_COPY_GC] = "1_444|1_444211111.44ss41!,ss4211",
[LIBAXL_REQUEST_SET_DASHES] = "1_422$*1",
[LIBAXL_REQUEST_SET_CLIP_RECTANGLES] = "11,4ss@*ss22",
[LIBAXL_REQUEST_FREE_GC] = "1_4",
[LIBAXL_REQUEST_CLEAR_AREA] = "1!,4ss22",
[LIBAXL_REQUEST_COPY_AREA] = "1_444ssss22",
[LIBAXL_REQUEST_COPY_PLANE] = "1_444ssss224",
[LIBAXL_REQUEST_POLY_POINT] = "11,44@*ss",
[LIBAXL_REQUEST_POLY_LINE] = "11,44@*ss",
[LIBAXL_REQUEST_POLY_SEGMENT] = "1_44@*ssss",
[LIBAXL_REQUEST_POLY_RECTANGLE] = "1_44@*ss22",
[LIBAXL_REQUEST_POLY_ARC] = "1_44@*ss22ss",
[LIBAXL_REQUEST_FILL_POLY] = "1_4411,@*ss",
[LIBAXL_REQUEST_POLY_FILL_RECTANGLE] = "1_44@*ss22",
[LIBAXL_REQUEST_POLY_FILL_ARC] = "1_44@*ss22ss",
[LIBAXL_REQUEST_PUT_IMAGE] = "11,4422ss11,@*1",
[LIBAXL_REQUEST_GET_IMAGE] = "11,4ss224",
[LIBAXL_REQUEST_POLY_TEXT8] = "1_44ss@*?1$zu\0""11111",
[LIBAXL_REQUEST_POLY_TEXT16] = "1_44ss@*?1$zU\0""11111",
[LIBAXL_REQUEST_IMAGE_TEXT8] = "11$,44ssu",
[LIBAXL_REQUEST_IMAGE_TEXT16] = "11$,44ssU",
[LIBAXL_REQUEST_CREATE_COLORMAP] = "11,444",
[LIBAXL_REQUEST_FREE_COLORMAP] = "1_4",
[LIBAXL_REQUEST_COPY_COLORMAP_AND_FREE] = "1_44",
[LIBAXL_REQUEST_INSTALL_COLORMAP] = "1_4",
[LIBAXL_REQUEST_UNINSTALL_COLORMAP] = "1_4",
[LIBAXL_REQUEST_LIST_INSTALLED_COLORMAPS] = "1_4",
[LIBAXL_REQUEST_ALLOC_COLOR] = "1_4222,",
[LIBAXL_REQUEST_ALLOC_NAMED_COLOR] = "1_42$,u",
[LIBAXL_REQUEST_ALLOC_COLOR_CELLS] = "1!,422",
[LIBAXL_REQUEST_ALLOC_COLOR_PLANES] = "1!,42222",
[LIBAXL_REQUEST_FREE_COLORS] = "1_44@*4",
[LIBAXL_REQUEST_STORE_COLORS] = "1_4@*42221.",
[LIBAXL_REQUEST_STORE_NAMED_COLOR] = "11,442$,u",
[LIBAXL_REQUEST_QUERY_COLORS] = "1_4@*4",
[LIBAXL_REQUEST_LOOKUP_COLOR] = "1_42$,u",
[LIBAXL_REQUEST_CREATE_CURSOR] = "1_4422222222",
[LIBAXL_REQUEST_CREATE_GLYPH_CURSOR] = "1_44422222222",
[LIBAXL_REQUEST_FREE_CURSOR] = "1_4",
[LIBAXL_REQUEST_RECOLOR_CURSOR] = "1_4222222",
[LIBAXL_REQUEST_QUERY_BEST_SIZE] = "11,422",
[LIBAXL_REQUEST_QUERY_EXTENSION] = "1_2$,u",
[LIBAXL_REQUEST_LIST_EXTENSIONS] = "1_",
[LIBAXL_REQUEST_CHANGE_KEYBOARD_MAPPING] = "11,11,?*4",
[LIBAXL_REQUEST_GET_KEYBOARD_MAPPING] = "1_11,",
[LIBAXL_REQUEST_CHANGE_KEYBOARD_CONTROL] = "1_4|zzss1111",
[LIBAXL_REQUEST_GET_KEYBOARD_CONTROL] = "1_",
[LIBAXL_REQUEST_BELL] = "1z,",
[LIBAXL_REQUEST_CHANGE_POINTER_CONTROL] = "1_sss!!",
[LIBAXL_REQUEST_GET_POINTER_CONTROL] = "1_",
[LIBAXL_REQUEST_SET_SCREEN_SAVER] = "1_ss11,",
[LIBAXL_REQUEST_GET_SCREEN_SAVER] = "1_",
[LIBAXL_REQUEST_CHANGE_HOSTS] = "11,1.2$*1",
[LIBAXL_REQUEST_LIST_HOSTS] = "1_",
[LIBAXL_REQUEST_SET_ACCESS_CONTROL] = "11,",
[LIBAXL_REQUEST_SET_CLOSE_DOWN_MODE] = "11,",
[LIBAXL_REQUEST_KILL_CLIENT] = "1_4",
[LIBAXL_REQUEST_ROTATE_PROPERTIES] = "1_42$s*4",
[LIBAXL_REQUEST_FORCE_SCREEN_SAVER] = "11,",
[LIBAXL_REQUEST_SET_POINTER_MAPPING] = "11$,*1",
[LIBAXL_REQUEST_GET_POINTER_MAPPING] = "1_",
[LIBAXL_REQUEST_SET_MODIFIER_MAPPING] = "11$,*11",
[LIBAXL_REQUEST_GET_MODIFIER_MAPPING] = "1_",
[LIBAXL_REQUEST_NO_OPERATION] = "1_?"
};
static int
send_all(int fd, void *restrict data, size_t n, int flags, size_t *restrict progressp)
{
char *bs = data;
ssize_t r;
while (n) {
r = liberror_send(fd, bs, n, flags, "<display server>");
if (r < 0)
return -1;
bs += r, n -= (size_t)r;
*progressp += (size_t)r;
}
return 0;
}
/* TODO make it possible to send multiple request in the same syscall */
int
libaxl_send_request(LIBAXL_CONTEXT *restrict ctx, union libaxl_request_const_ptr request, int flags, uint16_t *restrict seqnump)
{
LIBAXL_CONNECTION *conn = ctx->conn;
LIBAXL_CONTEXT *pending, **pendingp;
const char *req = request.as_voidptr;
uint8_t code = *(const uint8_t *)req;
const char *fmt, *repeat = NULL, *data;
size_t i = 0, o = 0, j, n;
size_t count = 0, format = 1, repcnt = 0;
uint32_t mask;
char *buf = ctx->out_buf, *subbuf, *new;
size_t size = ctx->out_buf_size;
RLOCK_CONNECTION_SEND(conn);
pending = conn->pending_out;
RUNLOCK_CONNECTION_SEND(conn);
if (pending) {
liberror_save_backtrace(NULL);
liberror_set_error(pending == ctx
? "Request from the previous call is pending to be flush"
: "A request from another thread is pending to be flushed",
"libaxl_send_request", "errno", EALREADY);
errno = EALREADY;
return LIBAXL_ERROR_SYSTEM;
}
if (!code || (code > LIBAXL_REQUEST_GET_MODIFIER_MAPPING && code != LIBAXL_REQUEST_NO_OPERATION)) {
liberror_save_backtrace(NULL);
liberror_set_error("Invalid request opcode", "libaxl_send_request", "libaxl",
LIBAXL_ERROR_INVALID_REQUEST_OPCODE);
errno = EINVAL;
return LIBAXL_ERROR_INVALID_REQUEST_OPCODE;
}
fmt = req_formats[code];
again:
for (;; fmt++) {
if (o + 4 > size) {
size += 32;
new = liberror_realloc(buf, size);
if (!new)
return LIBAXL_ERROR_SYSTEM;
ctx->out_buf = buf = new;
ctx->out_buf_size = size;
}
switch (*fmt) {
case '\0':
if (repeat && --count) {
fmt = repeat;
goto again;
}
goto done;
case '_':
buf[o++] = 0; /* need not be 0 */
/* fall through */
case ',':
buf[o++] = 0; /* need not be 0 */
/* fall through */
case '.':
buf[o++] = 0; /* need not be 0 */
break;
case '!':
buf[o++] = !!req[i++];
break;
case '1':
buf[o++] = req[i++];
break;
case '2':
*(uint16_t *)&buf[o] = htons(*(const uint16_t *)&req[i]);
i += 2;
o += 2;
break;
case '4':
*(uint32_t *)&buf[o] = htonl(*(const uint32_t *)&req[i]);
i += 4;
o += 4;
break;
case 'z':
buf[o] = req[i];
TWOS_COMPLEMENT8(&buf[o]);
i += 1;
o += 1;
break;
case 's':
*(uint16_t *)&buf[o] = htons(*(const uint16_t *)&req[i]);
TWOS_COMPLEMENT16(&buf[o]);
i += 2;
o += 2;
break;
case 'S':
*(uint32_t *)&buf[o] = htonl(*(const uint32_t *)&req[i]);
TWOS_COMPLEMENT32(&buf[o]);
i += 4;
o += 4;
break;
case '$':
if (fmt[-1] == '2')
count = (size_t)*(const uint16_t *)&req[i - 2];
else if (fmt[-1] == '1')
count = (size_t)*(const uint8_t *)&req[i - 1];
else
count = (size_t)*(const uint32_t *)&req[i - 4];
break;
case '%':
if (fmt[-1] == '1')
format = (size_t)*(const uint8_t *)&req[i - 1];
else if (fmt[-1] == '2')
format = (size_t)*(const uint16_t *)&req[i - 2];
else
format = (size_t)*(const uint32_t *)&req[i - 4];
break;
case '@':
ALIGN(&i, size_t);
count = *(const size_t *)&req[i - 2];
break;
case 'u':
format = 8;
goto case_d;
case 'U':
format = 16;
goto case_d;
case 'd':
case_d:
ALIGN(&i, void *);
data = *(const char *const *)&req[i];
count *= format / 8;
if (o + count > size) {
size += (count & 3) ? (count | 3) + 1 : count;
new = liberror_realloc(buf, size);
if (!new)
return LIBAXL_ERROR_SYSTEM;
ctx->out_buf = buf = new;
ctx->out_buf_size = size;
}
subbuf = &buf[o];
if (format == 8) {
for (j = 0; j < count; j += 1)
*(uint8_t *)&subbuf[j] = *(const uint8_t *)&data[j];
} else if (format == 16) {
for (j = 0; j < count; j += 2)
*(uint16_t *)&subbuf[j] = htons(*(const uint16_t *)&data[j]);
} else if (format == 32) {
for (j = 0; j < count; j += 4)
*(uint32_t *)&subbuf[j] = htonl(*(const uint32_t *)&data[j]);
} else if (format != 0) {
liberror_save_backtrace(NULL);
liberror_set_error("Invalid format number", "libaxl_send_request", "libaxl",
LIBAXL_ERROR_INVALID_FORMAT_NUMBER);
errno = EINVAL;
return LIBAXL_ERROR_INVALID_FORMAT_NUMBER;
}
o += count;
i += count;
break;
case 'e': /* TODO event */
ALIGN(&i, union libaxl_event);
break;
case '?':
fmt++;
goto special_encoding;
case '*':
repcnt = count;
if (!repcnt)
goto done;
ALIGN(&i, void *);
req = *(const char *const *)&req[i];
repeat = &fmt[1];
i = 0;
break;
case '|':
if (fmt[-1] == '4')
mask = *(const uint32_t *)&req[i - 4];
else if (fmt[-1] == '2')
mask = (uint32_t)*(const uint16_t *)&req[i - 2];
else
mask = (uint32_t)*(const uint8_t *)&req[i - 1];
for (fmt++;; fmt++) {
if (o + 4 > size) {
size += 32;
new = liberror_realloc(buf, size);
if (!new)
return LIBAXL_ERROR_SYSTEM;
ctx->out_buf = buf = new;
ctx->out_buf_size = size;
}
switch (*fmt) {
case '\0':
goto done;
case '.':
i += 1;
break;
case ',':
i += 2;
break;
case '_':
i += 3;
break;
case '!':
if (mask & 1) {
*(uint32_t *)&buf[o] = htonl((uint32_t)(req[i] ? 1 : 0));
o += 4;
}
mask >>= 1;
i += 1;
break;
case '1':
case 'z':
if (mask & 1) {
*(uint32_t *)&buf[o] = htonl((uint32_t)*(const uint8_t *)&req[i]);
if (*fmt == 'z')
TWOS_COMPLEMENT8(&buf[o]);
o += 4;
}
mask >>= 1;
i += 1;
break;
case '2':
case 's':
if (mask & 1) {
*(uint32_t *)&buf[o] = htonl((uint32_t)*(const uint16_t *)&req[i]);
if (*fmt == 'z')
TWOS_COMPLEMENT16(&buf[o]);
o += 4;
}
mask >>= 1;
i += 2;
break;
case '4':
case 'S':
if (mask & 1) {
*(uint32_t *)&buf[o] = htonl(*(const uint32_t *)&req[i]);
if (*fmt == 'z')
TWOS_COMPLEMENT32(&buf[o]);
o += 4;
}
mask >>= 1;
i += 4;
break;
default:
abort();
};
}
default:
abort();
}
}
special_encoding:
switch (code) {
case LIBAXL_REQUEST_QUERY_TEXT_EXTENTS:
buf[2] = (count & 1); /* _odd_length */
break;
case LIBAXL_REQUEST_CHANGE_KEYBOARD_MAPPING:
count = (size_t)((const union libaxl_request *)req)->change_keyboard_mapping.keycode_count;
count *= (size_t)((const union libaxl_request *)req)->change_keyboard_mapping.keysyms_per_keycode;
goto again;
case LIBAXL_REQUEST_POLY_TEXT8:
case LIBAXL_REQUEST_POLY_TEXT16:
if (((const uint8_t *)req)[i] == LIBAXL_FONT_SHIFT_INDICATOR)
while (*fmt++);
goto again;
case LIBAXL_REQUEST_NO_OPERATION:
if (!((const union libaxl_request *)req)->_request_length) {
liberror_save_backtrace(NULL);
liberror_set_error("Malformatted request: request length most be at least 1 byte-quad",
"libaxl_send_request", "libaxl", LIBAXL_ERROR_MALFORMATTED_REQUEST);
errno = EINVAL;
return LIBAXL_ERROR_MALFORMATTED_REQUEST;
}
o = 4 * (size_t)((const union libaxl_request *)req)->_request_length;
if (o > size) {
new = liberror_realloc(buf, o);
if (!new)
return LIBAXL_ERROR_SYSTEM;
ctx->out_buf = buf = new;
ctx->out_buf_size = size = o;
memset(&buf[4], 0, o - 4);
}
break;
default:
abort();
}
done:
if (o & 3) {
n = o;
o = (o | 3) + 1;
if (o > size) {
new = liberror_realloc(buf, o);
if (!new)
return LIBAXL_ERROR_SYSTEM;
ctx->out_buf = buf = new;
ctx->out_buf_size = o;
memset(&buf[n], 0, o - n);
}
}
n = o / 4;
if (n > UINT16_MAX) {
liberror_save_backtrace(NULL);
liberror_set_error("Message is too long, cannot be longer than 65535 byte-quads",
"libaxl_send_request", "errno", EMSGSIZE);
errno = EMSGSIZE;
return LIBAXL_ERROR_SYSTEM;
}
*(uint16_t *)&buf[2] = htons((uint16_t)n); /* _request_length */
ctx->out_length = o;
ctx->out_progress = 0;
WLOCK_CONNECTION_SEND(conn);
*seqnump = ++conn->last_seqnum;
conn->request_map[*seqnump] = code;
if (send_all(conn->fd, ctx->out_buf, ctx->out_length, flags, &ctx->out_progress)) {
ctx->next_pending_out = NULL;
pendingp = &conn->pending_out;
while (*pendingp)
pendingp = &(*pendingp)->next_pending_out;
*pendingp = ctx;
ctx->refcount += 1;
WUNLOCK_CONNECTION_SEND(conn);
liberror_save_backtrace(NULL);
liberror_set_error("Request has been buffered and is ready to be sent",
"libaxl_send_request", "errno", EINPROGRESS);
errno = EINPROGRESS;
return LIBAXL_ERROR_SYSTEM;
}
WUNLOCK_CONNECTION_SEND(conn);
return 0;
}
