static GstFlowReturn
gst_srtp_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf,
gboolean is_rtcp)
{
GstSrtpDec *filter = GST_SRTP_DEC (parent);
GstPad *otherpad;
GstSrtpDecSsrcStream *stream = NULL;
GstFlowReturn ret = GST_FLOW_OK;
guint32 ssrc = 0;
GST_OBJECT_LOCK (filter);
/* Check if this stream exists, if not create a new stream */
if (!(stream = validate_buffer (filter, buf, &ssrc, &is_rtcp))) {
GST_OBJECT_UNLOCK (filter);
GST_WARNING_OBJECT (filter, "Invalid buffer, dropping");
goto drop_buffer;
}
if (!STREAM_HAS_CRYPTO (stream)) {
GST_OBJECT_UNLOCK (filter);
goto push_out;
}
if (!gst_srtp_dec_decode_buffer (filter, pad, buf, is_rtcp, ssrc)) {
GST_OBJECT_UNLOCK (filter);
goto drop_buffer;
}
GST_OBJECT_UNLOCK (filter);
/* If all is well, we may have reached soft limit */
if (gst_srtp_get_soft_limit_reached ())
request_key_with_signal (filter, ssrc, SIGNAL_SOFT_LIMIT);
push_out:
/* Push buffer to source pad */
if (is_rtcp) {
otherpad = filter->rtcp_srcpad;
if (!filter->rtcp_has_segment)
gst_srtp_dec_push_early_events (filter, filter->rtcp_srcpad,
filter->rtp_srcpad, TRUE);
} else {
otherpad = filter->rtp_srcpad;
if (!filter->rtp_has_segment)
gst_srtp_dec_push_early_events (filter, filter->rtp_srcpad,
filter->rtcp_srcpad, FALSE);
}
ret = gst_pad_push (otherpad, buf);
return ret;
drop_buffer:
/* Drop buffer, except if gst_pad_push returned OK or an error */
gst_buffer_unref (buf);
return ret;
}
/* Reads a file into specified buffer and returns number of chars read or -1. */
static int syscall_read(int fd, void *buf, unsigned size)
{
int ret_val;
struct fd_elem **fdt = thread_current()->open_files;
/* Verify user supplied buffer is valid. */
validate_buffer(buf, size);
if(fd == STDIN_FILENO) { /* Read from stdin. */
char *c = buf;
while((void *) c < buf + size)
*c++ = input_getc();
ret_val = size;
} else if(fd >= 2 && fd < 128 && fdt[fd] != NULL) {
/* If fd is valid, read from file. */
lock_acquire(&fs_lock);
ret_val = file_read(fdt[fd]->file, buf, size);
lock_release(&fs_lock);
} else /* fd not valid. */
ret_val = -1;
return ret_val;
}
void add_numerals(char* result,size_t result_length, const char * first_numeral, const char * second_numeral)
{
if(!validate_buffer(result_length))
return;
result[0] = '\0';
char first_numeral_substituted[MAX_NUMERAL_SIZE];
char second_numeral_substituted[MAX_NUMERAL_SIZE];
strcpy(first_numeral_substituted, first_numeral);
strcpy(second_numeral_substituted, second_numeral);
substitute_out_subtractives(first_numeral_substituted);
substitute_out_subtractives(second_numeral_substituted);
strcpy(result, first_numeral_substituted);
strcat(result, second_numeral_substituted);
sort_descending(result);
combine_groups(result);
substitute_in_subtractives(result);
}
/* Writes a file into specified buffer and returns number of chars written or -1. */
static int syscall_write(int fd, void *buf, unsigned size){
int ret_val;
struct fd_elem **fdt = thread_current()->open_files;
/* Verify user supplied buffer is valid. */
validate_buffer(buf, size);
if (fd == STDOUT_FILENO){ /* Write to stdout. */
putbuf(buf, size);
ret_val = size;
} else if (fd >= 2 && fd < 128 && fdt[fd] != NULL){
/* If fd is valid, read from file. */
lock_acquire(&fs_lock);
ret_val = file_write(fdt[fd]->file, buf, size);
lock_release(&fs_lock);
} else /* fd not valid. */
ret_val = -1;
return ret_val;
}
static GstFlowReturn
gst_srtp_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf,
gboolean is_rtcp)
{
GstSrtpDec *filter = GST_SRTP_DEC (parent);
GstPad *otherpad;
err_status_t err = err_status_ok;
GstSrtpDecSsrcStream *stream = NULL;
GstFlowReturn ret = GST_FLOW_OK;
gint size;
guint32 ssrc = 0;
GstMapInfo map;
GST_OBJECT_LOCK (filter);
/* Check if this stream exists, if not create a new stream */
if (!(stream = validate_buffer (filter, buf, &ssrc, &is_rtcp))) {
GST_OBJECT_UNLOCK (filter);
GST_WARNING_OBJECT (filter, "Invalid buffer, dropping");
goto drop_buffer;
}
if (!STREAM_HAS_CRYPTO (stream)) {
GST_OBJECT_UNLOCK (filter);
goto push_out;
}
GST_LOG_OBJECT (pad, "Received %s buffer of size %" G_GSIZE_FORMAT
" with SSRC = %u", is_rtcp ? "RTCP" : "RTP", gst_buffer_get_size (buf),
ssrc);
/* Change buffer to remove protection */
buf = gst_buffer_make_writable (buf);
unprotect:
gst_buffer_map (buf, &map, GST_MAP_READWRITE);
size = map.size;
gst_srtp_init_event_reporter ();
if (is_rtcp)
err = srtp_unprotect_rtcp (filter->session, map.data, &size);
else {
/* If ROC has changed, we know we need to set the initial RTP
* sequence number too. */
if (filter->roc_changed) {
srtp_stream_t stream;
stream = srtp_get_stream (filter->session, htonl (ssrc));
if (stream) {
guint16 seqnum = 0;
GstRTPBuffer rtpbuf = GST_RTP_BUFFER_INIT;
gst_rtp_buffer_map (buf, GST_MAP_READ, &rtpbuf);
seqnum = gst_rtp_buffer_get_seq (&rtpbuf);
gst_rtp_buffer_unmap (&rtpbuf);
/* We finally add the RTP sequence number to the current
* rollover counter. */
stream->rtp_rdbx.index &= ~0xFFFF;
stream->rtp_rdbx.index |= seqnum;
}
filter->roc_changed = FALSE;
}
err = srtp_unprotect (filter->session, map.data, &size);
}
gst_buffer_unmap (buf, &map);
GST_OBJECT_UNLOCK (filter);
if (err != err_status_ok) {
GST_WARNING_OBJECT (pad,
"Unable to unprotect buffer (unprotect failed code %d)", err);
/* Signal user depending on type of error */
switch (err) {
case err_status_key_expired:
GST_OBJECT_LOCK (filter);
/* Update stream */
if (find_stream_by_ssrc (filter, ssrc)) {
GST_OBJECT_UNLOCK (filter);
if (request_key_with_signal (filter, ssrc, SIGNAL_HARD_LIMIT)) {
GST_OBJECT_LOCK (filter);
goto unprotect;
} else {
GST_WARNING_OBJECT (filter, "Hard limit reached, no new key, "
"dropping");
}
} else {
GST_WARNING_OBJECT (filter, "Could not find matching stream, "
"dropping");
}
break;
case err_status_auth_fail:
GST_WARNING_OBJECT (filter, "Error authentication packet, dropping");
break;
case err_status_cipher_fail:
GST_WARNING_OBJECT (filter, "Error while decrypting packet, dropping");
break;
default:
GST_WARNING_OBJECT (filter, "Other error, dropping");
break;
}
goto drop_buffer;
}
gst_buffer_set_size (buf, size);
/* If all is well, we may have reached soft limit */
if (gst_srtp_get_soft_limit_reached ())
request_key_with_signal (filter, ssrc, SIGNAL_SOFT_LIMIT);
push_out:
/* Push buffer to source pad */
if (is_rtcp) {
otherpad = filter->rtcp_srcpad;
if (!filter->rtcp_has_segment)
gst_srtp_dec_push_early_events (filter, filter->rtcp_srcpad,
filter->rtp_srcpad, TRUE);
} else {
otherpad = filter->rtp_srcpad;
if (!filter->rtp_has_segment)
gst_srtp_dec_push_early_events (filter, filter->rtp_srcpad,
filter->rtcp_srcpad, FALSE);
}
ret = gst_pad_push (otherpad, buf);
return ret;
drop_buffer:
/* Drop buffer, except if gst_pad_push returned OK or an error */
gst_buffer_unref (buf);
return ret;
}
void
piglit_init(int argc, char **argv)
{
static const float uniform_data[4] = {
12.0, 0.5, 3.14169, 42.0
};
GLint vs;
GLint fs;
unsigned i;
union data_blob buffer[16];
piglit_require_vertex_shader();
piglit_require_fragment_shader();
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text);
prog = piglit_link_simple_program(vs, fs);
piglit_UseProgram(prog);
base_location = piglit_GetUniformLocation(prog, "c");
if (base_location < 0) {
printf("Could not get location of `c'.\n");
piglit_report_result(PIGLIT_FAIL);
}
for (i = 0; i < 4; i++) {
char name[5];
name[0] = 'c';
name[1] = '[';
name[2] = '0' + i;
name[3] = ']';
name[4] = '\0';
array_location[i] = piglit_GetUniformLocation(prog, name);
if (array_location[i] < 0) {
printf("Could not get location of `%s'.\n", name);
piglit_report_result(PIGLIT_FAIL);
}
}
/* From page 80 of the OpenGL 2.1 spec:
*
* The first element of a uniform array is identified using the
* name of the uniform array appended with "[0]". Except if the
* last part of the string name indicates a uniform array, then
* the location of the first element of that array can be
* retrieved by either using the name of the uniform array, or the
* name of the uniform array appended with "[0]".
*/
if (base_location != array_location[0]) {
printf("Locations of `c' = %d and `c[0]' = %d, but they "
"should be the same.\n",
base_location, array_location[0]);
piglit_report_result(PIGLIT_FAIL);
}
piglit_Uniform1fv(base_location, 4, uniform_data);
/* From page 264 of the OpenGL 2.1 spec:
*
* In order to query the values of an array of uniforms, a
* GetUniform* command needs to be issued for each array element.
*
* This means that querying using the location of 'array' is the same
* as 'array[0]'.
*/
printf("Getting array element 0 from base location...\n");
for (i = 0; i < ARRAY_SIZE(buffer); i++) {
buffer[i].u = 0xdeadbeef;
}
piglit_GetUniformfv(prog, base_location, (GLfloat *) buffer);
validate_buffer(buffer, ARRAY_SIZE(buffer), uniform_data[0]);
printf("Getting one array element at a time...\n");
for (i = 0; i < 4; i++) {
unsigned j;
for (j = 0; j < ARRAY_SIZE(buffer); j++) {
buffer[j].u = 0xdeadbeef;
}
piglit_GetUniformfv(prog, array_location[i],
(GLfloat *) buffer);
validate_buffer(buffer, ARRAY_SIZE(buffer), uniform_data[i]);
}
piglit_report_result(PIGLIT_PASS);
}