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#include <string.h>
#include "uca-net-protocol.h"
static UcaNetHandlers handlers;
static void
send_reply (GOutputStream *output, gpointer data, gsize size, GError **error)
{
gsize written;
if (!g_output_stream_write_all (output, data, size, &written, NULL, error))
return;
if (!g_output_stream_flush (output, NULL, error))
return;
}
static void
prepare_error_reply (GError *error, UcaNetErrorReply *reply)
{
if (error != NULL) {
reply->occurred = TRUE;
reply->code = error->code;
strncpy (reply->domain, g_quark_to_string (error->domain), sizeof (error->domain));
strncpy (reply->message, error->message, sizeof (reply->message));
g_error_free (error);
}
else {
reply->occurred = FALSE;
}
}
static void
uca_net_server_handle_get_property (GOutputStream *output, UcaNetMessageGetPropertyRequest *request, GError **error)
{
UcaNetMessageGetPropertyReply reply = { .type = UCA_NET_MESSAGE_GET_PROPERTY };
handlers.get_property (handlers.user_data, request->property_name, reply.property_value);
send_reply (output, &reply, sizeof (reply), error);
}
static void
uca_net_server_handle_set_property (GOutputStream *output, UcaNetMessageSetPropertyRequest *request, GError **stream_error)
{
UcaNetDefaultReply reply = { .type = UCA_NET_MESSAGE_SET_PROPERTY };
GError *error = NULL;
handlers.set_property (handlers.user_data, request->property_name, request->property_value, &error);
prepare_error_reply (error, &reply.error);
send_reply (output, &reply, sizeof (reply), stream_error);
}
static void
uca_net_server_handle_start_recording (GOutputStream *output, GError **stream_error)
{
UcaNetDefaultReply reply = { .type = UCA_NET_MESSAGE_START_RECORDING };
GError *error = NULL;
handlers.start_recording (handlers.user_data, &error);
prepare_error_reply (error, &reply.error);
send_reply (output, &reply, sizeof (reply), stream_error);
}
static void
uca_net_server_handle_stop_recording (GOutputStream *output, GError **stream_error)
{
UcaNetDefaultReply reply = { .type = UCA_NET_MESSAGE_STOP_RECORDING };
GError *error = NULL;
handlers.stop_recording (handlers.user_data, &error);
prepare_error_reply (error, &reply.error);
send_reply (output, &reply, sizeof (reply), stream_error);
}
static void
uca_net_server_handle_grab (GOutputStream *output, UcaNetMessageGrabRequest *request, GError **stream_error)
{
UcaNetDefaultReply reply = { .type = UCA_NET_MESSAGE_GRAB };
gsize bytes_left;
GError *error = NULL;
static gsize size = 0;
static gchar *buffer = NULL;
if (buffer == NULL || size != request->size) {
buffer = g_realloc (buffer, request->size);
size = request->size;
}
handlers.grab (buffer, handlers.user_data, &error);
prepare_error_reply (error, &reply.error);
send_reply (output, &reply, sizeof (reply), stream_error);
/* send data if no error occured during grab */
if (!reply.error.occurred) {
bytes_left = size;
while (bytes_left > 0) {
gssize written;
written = g_output_stream_write (output, &buffer[size - bytes_left], bytes_left, NULL, stream_error);
if (written < 0)
return;
bytes_left -= written;
}
}
}
void
uca_net_server_register_handlers (UcaNetHandlers *new_handlers)
{
memcpy (&handlers, new_handlers, sizeof (UcaNetHandlers));
}
void
uca_net_server_handle (GSocketConnection *connection)
{
GInputStream *input;
GOutputStream *output;
gchar *buffer;
gboolean active;
buffer = g_malloc0 (4096);
input = g_io_stream_get_input_stream (G_IO_STREAM (connection));
output = g_io_stream_get_output_stream (G_IO_STREAM (connection));
active = TRUE;
while (active) {
UcaNetMessageDefault *message;
GError *error = NULL;
/* looks dangerous */
g_input_stream_read (input, buffer, 4096, NULL, &error);
message = (UcaNetMessageDefault *) buffer;
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_BROKEN_PIPE)) {
g_error_free (error);
active = FALSE;
break;
}
switch (message->type) {
case UCA_NET_MESSAGE_GET_PROPERTY:
uca_net_server_handle_get_property (output, (UcaNetMessageGetPropertyRequest *) buffer, &error);
break;
case UCA_NET_MESSAGE_SET_PROPERTY:
uca_net_server_handle_set_property (output, (UcaNetMessageSetPropertyRequest *) buffer, &error);
break;
case UCA_NET_MESSAGE_START_RECORDING:
uca_net_server_handle_start_recording (output, &error);
break;
case UCA_NET_MESSAGE_STOP_RECORDING:
uca_net_server_handle_stop_recording (output, &error);
break;
case UCA_NET_MESSAGE_GRAB:
uca_net_server_handle_grab (output, (UcaNetMessageGrabRequest *) buffer, &error);
break;
case UCA_NET_MESSAGE_CLOSE_CONNECTION:
active = FALSE;
break;
default:
g_warning ("Message type not known");
}
if (error != NULL) {
g_warning ("Error handling requests: %s", error->message);
g_error_free (error);
active = FALSE;
}
}
g_free (buffer);
}
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