summaryrefslogtreecommitdiffstats
path: root/extras/libmemif/examples/common/responder.c
diff options
context:
space:
mode:
Diffstat (limited to 'extras/libmemif/examples/common/responder.c')
-rw-r--r--extras/libmemif/examples/common/responder.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/extras/libmemif/examples/common/responder.c b/extras/libmemif/examples/common/responder.c
new file mode 100644
index 00000000000..e0fa9e35b08
--- /dev/null
+++ b/extras/libmemif/examples/common/responder.c
@@ -0,0 +1,172 @@
+#include <common.h>
+
+int
+responder (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
+{
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+ int err, i;
+ uint16_t tx;
+
+ /* receive packets from the shared memory */
+ err = memif_rx_burst (conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &c->rx_buf_num);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_rx_burst: %s", memif_strerror (err));
+ return err;
+ }
+
+ do
+ {
+ /* allocate tx buffers */
+ err = memif_buffer_alloc (conn, qid, c->tx_bufs, c->rx_buf_num,
+ &c->tx_buf_num, 2048);
+ /* suppress full ring error MEMIF_ERR_NOBUF_RING */
+ if (err != MEMIF_ERR_SUCCESS && err != MEMIF_ERR_NOBUF_RING)
+ {
+ INFO ("memif_buffer_alloc: %s", memif_strerror (err));
+ goto error;
+ }
+
+ /* Process the packets */
+ if (c->packet_handler == NULL)
+ {
+ INFO ("Missing packet handler");
+ goto error;
+ }
+ err = c->packet_handler (c);
+ if (err != 0)
+ {
+ INFO ("packet handler error: %d", err);
+ goto error;
+ }
+ /* Done processing packets */
+
+ /* refill the queue */
+ err = memif_refill_queue (conn, qid, c->tx_buf_num, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ goto error;
+ }
+ c->rx_buf_num -= c->tx_buf_num;
+
+ err = memif_tx_burst (conn, qid, c->tx_bufs, c->tx_buf_num, &tx);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_tx_burst: %s", memif_strerror (err));
+ goto error;
+ }
+ c->tx_buf_num -= tx;
+
+ /* This should never happen */
+ if (c->tx_buf_num != 0)
+ {
+ INFO ("memif_tx_burst failed to send all allocated buffers.");
+ goto error;
+ }
+ }
+ while (c->rx_buf_num > 0);
+
+ return 0;
+
+error:
+ err = memif_refill_queue (conn, qid, c->rx_buf_num, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ return err;
+ }
+ c->rx_buf_num = 0;
+
+ return -1;
+}
+
+int
+responder_zero_copy (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
+{
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+ int err, i;
+ uint16_t tx, tx2;
+
+ /* receive packets from the shared memory */
+ err = memif_rx_burst (conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &c->rx_buf_num);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_rx_burst: %s", memif_strerror (err));
+ return err;
+ }
+
+ do
+ {
+ /* Note that in zero copy memif_buffer_alloc is not part of respond
+ process,
+ * instead rx buffers are used directly using memif_buffer_enq_tx.
+ * /
+
+ /* Process the packets */
+ if (c->packet_handler == NULL)
+ {
+ INFO ("Missing packet handler");
+ goto error;
+ }
+ err = c->packet_handler (c);
+ if (err != 0)
+ {
+ INFO ("packet handler error: %d", err);
+ goto error;
+ }
+ /* Done processing packets */
+
+ /* Swap rx and tx buffers, swapped tx buffers are considered allocated
+ * and are ready to be transmitted. Notice that the buffers are swapped
+ * only in memif driver and locally remain in rx_bufs queue.
+ */
+ err = memif_buffer_enq_tx (conn, qid, c->rx_bufs, c->rx_buf_num, &tx);
+ /* suppress full ring error MEMIF_ERR_NOBUF_RING */
+ if (err != MEMIF_ERR_SUCCESS && err != MEMIF_ERR_NOBUF_RING)
+ {
+ INFO ("memif_buffer_alloc: %s", memif_strerror (err));
+ goto error;
+ }
+
+ /* refill the queue */
+ err = memif_refill_queue (conn, qid, tx, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ goto error;
+ }
+ c->rx_buf_num -= tx;
+
+ /* Notice that we send from rx_bufs as the buffers were only swapped
+ * internally in memif driver */
+ err = memif_tx_burst (conn, qid, c->rx_bufs, tx, &tx2);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_tx_burst: %s", memif_strerror (err));
+ goto error;
+ }
+ tx -= tx2;
+
+ /* This should never happen */
+ if (tx != 0)
+ {
+ INFO ("memif_tx_burst failed to send all allocated buffers.");
+ goto error;
+ }
+ }
+ while (c->rx_buf_num > 0);
+
+ return 0;
+
+error:
+ err = memif_refill_queue (conn, qid, c->rx_buf_num, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ return err;
+ }
+ c->rx_buf_num = 0;
+
+ return -1;
+} \ No newline at end of file