Adding upstream version 3.2.6.upstream/3.2.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/src/knot/server/xdp-handler.h b/src/knot/server/xdp-handler.h
new file mode 100644
index 0000000..e6374ca
--- /dev/null
+++ b/src/knot/server/xdp-handler.h
@@ -0,0 +1,67 @@
+/*  Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#ifdef ENABLE_XDP
+
+#include "knot/query/layer.h"
+#include "libknot/xdp/xdp.h"
+
+#define XDP_BATCHLEN  32 /*!< XDP receive batch size. */
+
+struct xdp_handle_ctx;
+struct server;
+
+/*!
+ * \brief Initialize XDP packet handling context.
+ */
+struct xdp_handle_ctx *xdp_handle_init(struct server *server, knot_xdp_socket_t *sock);
+
+/*!
+ * \brief Deinitialize XDP packet handling context.
+ */
+void xdp_handle_free(struct xdp_handle_ctx *ctx);
+
+/*!
+ * \brief Receive packets thru XDP socket.
+ */
+int xdp_handle_recv(struct xdp_handle_ctx *ctx);
+
+/*!
+ * \brief Answer packets including DNS layers.
+ *
+ * \warning In case of TCP, this also sends some packets, e.g. ACK.
+ */
+void xdp_handle_msgs(struct xdp_handle_ctx *ctx, knot_layer_t *layer,
+                     struct server *server, unsigned thread_id);
+
+/*!
+ * \brief Send packets thru XDP socket.
+ */
+void xdp_handle_send(struct xdp_handle_ctx *ctx);
+
+/*!
+ * \brief Check for old TCP connections and close/reset them.
+ */
+void xdp_handle_sweep(struct xdp_handle_ctx *ctx);
+
+/*!
+ * \brief Update configuration parameters of running ctx.
+ */
+void xdp_handle_reconfigure(struct xdp_handle_ctx *ctx);
+
+#endif // ENABLE_XDP