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[client] spice: correct sending of large va agent buffers

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This commit is contained in:
Geoffrey McRae
2019-02-24 15:35:17 +11:00
parent b368873f4d
commit 03628505ed
1 changed files with 38 additions and 16 deletions
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54
client/spice/spice.c
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@@ -54,6 +54,12 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#define DEBUG_KEYBOARD(fmt, args...) do {} while(0)
#endif
#ifdef DEBUG_SPICE_CLIPBOARD
#define DEBUG_CLIPBOARD(fmt, args...) DEBUG_PRINT("[C]", fmt, ##args)
#else
#define DEBUG_CLIPBOARD(fmt, args...) do {} while(0)
#endif
// we don't really need flow control because we are all local
// instead do what the spice-gtk library does and provide the largest
// possible number
@@ -160,7 +166,7 @@ static SpiceDataType agent_type_to_spice_type(uint32_t type);
// thread safe read/write methods
bool spice_write_msg (struct SpiceChannel * channel, uint32_t type, const void * buffer, const ssize_t size);
bool spice_agent_write_msg (uint32_t type, const void * buffer, const ssize_t size);
bool spice_agent_write_msg (uint32_t type, const void * buffer, ssize_t size);
// non thread safe read/write methods (nl = non-locking)
bool spice_read_nl (const struct SpiceChannel * channel, void * buffer, const ssize_t size);
@@ -1018,7 +1024,7 @@ bool spice_agent_process(uint32_t dataSize)
if (msg.type == VD_AGENT_CLIPBOARD_RELEASE)
{
DEBUG_PROTO("VD_AGENT_CLIPBOARD_RELEASE");
DEBUG_CLIPBOARD("VD_AGENT_CLIPBOARD_RELEASE");
spice.cbAgentGrabbed = false;
if (spice.cbReleaseFn)
spice.cbReleaseFn();
@@ -1038,7 +1044,7 @@ bool spice_agent_process(uint32_t dataSize)
if (msg.type == VD_AGENT_CLIPBOARD)
{
DEBUG_PROTO("VD_AGENT_CLIPBOARD");
DEBUG_CLIPBOARD("VD_AGENT_CLIPBOARD");
if (spice.cbBuffer)
{
DEBUG_ERROR("cbBuffer was never freed");
@@ -1070,7 +1076,7 @@ bool spice_agent_process(uint32_t dataSize)
}
else
{
DEBUG_PROTO("VD_AGENT_CLIPBOARD_REQUEST");
DEBUG_CLIPBOARD("VD_AGENT_CLIPBOARD_REQUEST");
if (spice.cbRequestFn)
spice.cbRequestFn(agent_type_to_spice_type(type));
return true;
@@ -1078,7 +1084,7 @@ bool spice_agent_process(uint32_t dataSize)
}
else
{
DEBUG_PROTO("VD_AGENT_CLIPBOARD_GRAB");
DEBUG_CLIPBOARD("VD_AGENT_CLIPBOARD_GRAB");
if (remaining == 0)
return true;
@@ -1092,8 +1098,9 @@ bool spice_agent_process(uint32_t dataSize)
// there is zero documentation on the types field, it might be a bitfield
// but for now we are going to assume it's not.
spice.cbType = agent_type_to_spice_type(types[0]);
spice.cbAgentGrabbed = true;
spice.cbType = agent_type_to_spice_type(types[0]);
spice.cbAgentGrabbed = true;
spice.cbClientGrabbed = false;
if (spice.cbSelection)
{
// Windows doesnt support this, so until it's needed there is no point messing with it
@@ -1154,7 +1161,7 @@ bool spice_agent_send_caps(bool request)
// ============================================================================
bool spice_agent_write_msg(uint32_t type, const void * buffer, const ssize_t size)
bool spice_agent_write_msg(uint32_t type, const void * buffer, ssize_t size)
{
VDAgentMessage msg;
msg.protocol = VD_AGENT_PROTOCOL;
@@ -1163,21 +1170,40 @@ bool spice_agent_write_msg(uint32_t type, const void * buffer, const ssize_t siz
msg.size = size;
LG_LOCK(spice.scMain.lock);
if (!spice_write_msg_nl(&spice.scMain, SPICE_MSGC_MAIN_AGENT_DATA, &msg, sizeof(msg), size))
uint8_t * buf = (uint8_t *)buffer;
ssize_t toWrite = size > VD_AGENT_MAX_DATA_SIZE - sizeof(msg) ? VD_AGENT_MAX_DATA_SIZE - sizeof(msg) : size;
if (!spice_write_msg_nl(&spice.scMain, SPICE_MSGC_MAIN_AGENT_DATA, &msg, sizeof(msg), toWrite))
{
LG_UNLOCK(spice.scMain.lock);
DEBUG_ERROR("failed to write agent data header");
return false;
}
if (buffer && size)
bool first = true;
while(toWrite)
{
if (spice_write_nl(&spice.scMain, buffer, size) != size)
bool ok = false;
if (first)
{
ok = spice_write_nl(&spice.scMain, buf, toWrite) == toWrite;
first = false;
}
else
{
ok = spice_write_msg_nl(&spice.scMain, SPICE_MSGC_MAIN_AGENT_DATA, buf, toWrite, 0);
}
if (!ok)
{
LG_UNLOCK(spice.scMain.lock);
DEBUG_ERROR("failed to write agent data payload");
return false;
}
size -= toWrite;
buf += toWrite;
toWrite = size > VD_AGENT_MAX_DATA_SIZE ? VD_AGENT_MAX_DATA_SIZE : size;
}
LG_UNLOCK(spice.scMain.lock);
@@ -1542,10 +1568,6 @@ bool spice_set_clipboard_cb(SpiceClipboardNotice cbNoticeFn, SpiceClipboardData
bool spice_clipboard_grab(SpiceDataType type)
{
// release first if we have grabbed previously
if (spice.cbClientGrabbed && !spice_clipboard_release())
return false;
if (type == SPICE_DATA_NONE)
{
DEBUG_ERROR("grab type is invalid");
@@ -1614,7 +1636,7 @@ bool spice_clipboard_release()
bool spice_clipboard_data(SpiceDataType type, uint8_t * data, size_t size)
{
uint8_t * buffer;
uint8_t bufSize;
size_t bufSize;
if (spice.cbSelection)
{