// Release a TX frame, and mark it as ready to send
bool ringRawsockTxFrameReady(void *pvRawsock, U8 *pBuffer, unsigned int len, U64 timeNsec)
{
AVB_TRACE_ENTRY(AVB_TRACE_RAWSOCK_DETAIL);
ring_rawsock_t *rawsock = (ring_rawsock_t*)pvRawsock;
if (!VALID_TX_RAWSOCK(rawsock)) {
AVB_LOG_ERROR("Marking TX frame ready; invalid argument");
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return FALSE;
}
if (timeNsec) {
IF_LOG_INTERVAL(1000) AVB_LOG_WARNING("launch time is unsupported in ring_rawsock");
}
volatile struct tpacket2_hdr *pHdr = (struct tpacket2_hdr*)(pBuffer - rawsock->bufHdrSize);
AVB_LOGF_VERBOSE("pBuffer=%p, pHdr=%p szFrame=%d, len=%d", pBuffer, pHdr, rawsock->base.frameSize, len);
assert(len <= rawsock->bufferSize);
pHdr->tp_len = len;
pHdr->tp_status = TP_STATUS_SEND_REQUEST;
rawsock->buffersReady += 1;
if (rawsock->buffersReady >= rawsock->frameCount) {
AVB_LOG_WARNING("All buffers in ready/unsent state, calling send");
ringRawsockSend(pvRawsock);
}
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return TRUE;
}
bool halTimeGetLocaltime(U64 *localTime64)
{
AVB_TRACE_ENTRY(AVB_TRACE_TIME);
if (igb_get_wallclock(igb_dev, localTime64, NULL ) > 0) {
IF_LOG_INTERVAL(1000) AVB_LOG_ERROR("Failed to get wallclock time");
AVB_TRACE_EXIT(AVB_TRACE_TIME);
return FALSE;
}
AVB_TRACE_EXIT(AVB_TRACE_TIME);
return TRUE;
}
bool pcapRawsockTxFrameReady(void *pvRawsock, U8 *pBuffer, unsigned int len, U64 timeNsec)
{
pcap_rawsock_t *rawsock = (pcap_rawsock_t*)pvRawsock;
int ret = -1;
if (timeNsec) {
IF_LOG_INTERVAL(1000) AVB_LOG_WARNING("launch time is unsupported in pcap_rawsock");
}
if (rawsock) {
ret = pcap_sendpacket(rawsock->handle, pBuffer, len);
if (ret == -1) {
AVB_LOGF_ERROR("pcap_sendpacket failed: %s", pcap_geterr(rawsock->handle));
}
}
return ret == 0;
}
bool openavbIntfMpeg2tsGstTxCB(media_q_t *pMediaQ)
{
AVB_TRACE_ENTRY(AVB_TRACE_INTF_DETAIL);
if (!pMediaQ)
{
AVB_TRACE_EXIT(AVB_TRACE_INTF_DETAIL);
return FALSE;
}
pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;
if (!pPvtData)
{
AVB_LOG_ERROR("Private interface module data not allocated.");
return FALSE;
}
if (!pPvtData->appsink)
{
AVB_TRACE_EXIT(AVB_TRACE_INTF_DETAIL);
return FALSE;
}
media_q_item_t *pMediaQItem;
GstAlBuf *txBuf;
while (g_atomic_int_get(&pPvtData->nWaiting) > 0)
{
// Get a mediaQItem to hold the buffered data
pMediaQItem = openavbMediaQHeadLock(pMediaQ);
if (!pMediaQItem)
{
IF_LOG_INTERVAL(1000) AVB_LOG_ERROR("Media queue full");
break;
}
/* Retrieve the buffer
*/
txBuf = gst_al_pull_buffer(pPvtData->appsink);
if (txBuf)
{
g_atomic_int_add(&pPvtData->nWaiting, -1);
if ( GST_AL_BUF_SIZE(txBuf) > pMediaQItem->itemSize )
{
AVB_LOGF_ERROR("GStreamer buffer too large (size=%d) for mediaQ item (dataLen=%d)",
GST_AL_BUF_SIZE(txBuf), pMediaQItem->itemSize);
pMediaQItem->dataLen = 0;
openavbMediaQHeadUnlock(pMediaQ);
}
else
{
memcpy(pMediaQItem->pPubData, GST_AL_BUF_DATA(txBuf), GST_AL_BUF_SIZE(txBuf));
pMediaQItem->dataLen = GST_AL_BUF_SIZE(txBuf);
openavbAvtpTimeSetToWallTime(pMediaQItem->pAvtpTime);
openavbMediaQHeadPush(pMediaQ);
}
gst_al_buffer_unref(txBuf);
}
else
{
AVB_LOG_ERROR("GStreamer buffer pull failed");
// assume the pipeline is empty
g_atomic_int_set(&pPvtData->nWaiting, 0);
// abandon the mediaq item
pMediaQItem->dataLen = 0;
openavbMediaQHeadUnlock(pMediaQ);
// and get out
break;
}
}
AVB_TRACE_EXIT(AVB_TRACE_INTF_DETAIL);
return TRUE;
}
// Get a RX frame
U8* ringRawsockGetRxFrame(void *pvRawsock, U32 timeout, unsigned int *offset, unsigned int *len)
{
AVB_TRACE_ENTRY(AVB_TRACE_RAWSOCK_DETAIL);
ring_rawsock_t *rawsock = (ring_rawsock_t*)pvRawsock;
if (!VALID_RX_RAWSOCK(rawsock)) {
AVB_LOG_ERROR("Getting RX frame; invalid arguments");
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return NULL;
}
if (rawsock->buffersOut >= rawsock->frameCount) {
AVB_LOG_ERROR("Too many RX buffers in use");
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return NULL;
}
// Get pointer to active buffer in ring
volatile struct tpacket2_hdr *pHdr =
(struct tpacket2_hdr*)(rawsock->pMem
+ (rawsock->blockIndex * rawsock->blockSize)
+ (rawsock->bufferIndex * rawsock->bufferSize));
volatile U8 *pBuffer = (U8*)pHdr + rawsock->bufHdrSize;
AVB_LOGF_VERBOSE("block=%d, buffer=%d, out=%d, pBuffer=%p, pHdr=%p",
rawsock->blockIndex, rawsock->bufferIndex, rawsock->buffersOut,
pBuffer, pHdr);
// Check if buffer ready for user
// In receive mode, we want TP_STATUS_USER flag set
if ((pHdr->tp_status & TP_STATUS_USER) == 0)
{
struct timespec ts, *pts = NULL;
struct pollfd pfd;
// Use poll to wait for "ready to read" condition
// Poll even if our timeout is 0 - to catch the case where
// kernel is writing to the wrong slot (see below.)
if (timeout != OPENAVB_RAWSOCK_BLOCK) {
ts.tv_sec = timeout / MICROSECONDS_PER_SECOND;
ts.tv_nsec = (timeout % MICROSECONDS_PER_SECOND) * NANOSECONDS_PER_USEC;
pts = &ts;
}
pfd.fd = rawsock->sock;
pfd.events = POLLIN;
pfd.revents = 0;
int ret = ppoll(&pfd, 1, pts, NULL);
if (ret < 0) {
if (errno != EINTR) {
AVB_LOGF_ERROR("Getting RX frame; poll failed: %s", strerror(errno));
}
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return NULL;
}
if ((pfd.revents & POLLIN) == 0) {
// timeout
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return NULL;
}
if ((pHdr->tp_status & TP_STATUS_USER) == 0) {
// Hmmm, this is unexpected. poll indicated that the
// socket was ready to read, but the slot in the TX ring
// that we're looking for the kernel to fill isn't filled.
// If there aren't any RX buffers held by the application,
// we can try to fix this sticky situation...
if (rawsock->buffersOut == 0) {
// Scan forward through the RX ring, and look for a
// buffer that's ready for us to read. The kernel has
// a bad habit of not starting at the beginning of the
// ring when the listener process is restarted.
int nSkipped = 0;
while((pHdr->tp_status & TP_STATUS_USER) == 0) {
// Move to next slot in ring.
// (Increment buffer/block indexes)
if (++(rawsock->bufferIndex) >= (rawsock->frameCount/rawsock->blockCount)) {
rawsock->bufferIndex = 0;
if (++(rawsock->blockIndex) >= rawsock->blockCount) {
rawsock->blockIndex = 0;
}
}
// Adjust pHdr, pBuffer to point to the new slot
pHdr = (struct tpacket2_hdr*)(rawsock->pMem
+ (rawsock->blockIndex * rawsock->blockSize)
+ (rawsock->bufferIndex * rawsock->bufferSize));
pBuffer = (U8*)pHdr + rawsock->bufHdrSize;
// If we've scanned all the way around the ring, bail out.
if (++nSkipped > rawsock->frameCount) {
AVB_LOG_WARNING("Getting RX frame; no frame after poll");
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return NULL;
}
}
// We found a slot that's ready. Hopefully, we're good now.
AVB_LOGF_WARNING("Getting RX frame; skipped %d empty slots (rawsock=%p)", nSkipped, rawsock);
}
else {
AVB_LOG_WARNING("Getting RX frame; no frame after poll");
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return NULL;
}
}
}
AVB_LOGF_VERBOSE("Buffer status=0x%4.4lx", (unsigned long)pHdr->tp_status);
if (pHdr->tp_status & TP_STATUS_COPY) {
AVB_LOG_WARNING("Frame too big for receive buffer");
}
// Check the "losing" flag. That indicates that the ring is full,
// and the kernel had to toss some frames. There is no "winning" flag.
if ((pHdr->tp_status & TP_STATUS_LOSING)) {
if (!rawsock->bLosing) {
AVB_LOG_WARNING("Getting RX frame; mmap buffers full");
rawsock->bLosing = TRUE;
}
}
else {
rawsock->bLosing = FALSE;
}
// increment indexes for next time
if (++(rawsock->bufferIndex) >= (rawsock->frameCount/rawsock->blockCount)) {
rawsock->bufferIndex = 0;
if (++(rawsock->blockIndex) >= rawsock->blockCount) {
rawsock->blockIndex = 0;
}
}
// Remember that the client has another buffer
rawsock->buffersOut += 1;
if (pHdr->tp_snaplen < pHdr->tp_len) {
#if (AVB_LOG_LEVEL >= AVB_LOG_LEVEL_VERBOSE)
AVB_LOGF_WARNING("Getting RX frame; partial frame ignored (len %d, snaplen %d)", pHdr->tp_len, pHdr->tp_snaplen);
AVB_LOG_BUFFER(AVB_LOG_LEVEL_VERBOSE, (const U8 *) pBuffer + (pHdr->tp_mac - rawsock->bufHdrSize), pHdr->tp_len, 16);
#else
IF_LOG_INTERVAL(1000) AVB_LOGF_WARNING("Getting RX frame; partial frame ignored (len %d, snaplen %d)", pHdr->tp_len, pHdr->tp_snaplen);
#endif
ringRawsockRelRxFrame(rawsock, (U8*)pBuffer);
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return NULL;
}
// Return pointer to the buffer and length
*offset = pHdr->tp_mac - rawsock->bufHdrSize;
*len = pHdr->tp_snaplen;
AVB_LOGF_VERBOSE("Good RX frame (len %d, snaplen %d)", pHdr->tp_len, pHdr->tp_snaplen);
AVB_TRACE_EXIT(AVB_TRACE_RAWSOCK_DETAIL);
return (U8*)pBuffer;
}