1 files changed, 91 insertions, 0 deletions
diff --git a/bgpd/bgp_io.h b/bgpd/bgp_io.h
new file mode 100644
index 0000000..8d48112
--- /dev/null
+++ b/bgpd/bgp_io.h
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* BGP I/O.
+ * Implements packet I/O in a pthread.
+ * Copyright (C) 2017  Cumulus Networks
+ * Quentin Young
+ */
+
+#ifndef _FRR_BGP_IO_H
+#define _FRR_BGP_IO_H
+
+#define BGP_WRITE_PACKET_MAX 64U
+#define BGP_READ_PACKET_MAX  10U
+
+#include "bgpd/bgpd.h"
+#include "frr_pthread.h"
+
+struct peer_connection;
+
+/**
+ * Start function for write thread.
+ *
+ * @param arg - unused
+ */
+extern void *bgp_io_start(void *arg);
+
+/**
+ * Start function for write thread.
+ *
+ * Uninitializes all resources and stops the thread.
+ *
+ * @param result - where to store data result, unused
+ */
+extern int bgp_io_stop(void **result, struct frr_pthread *fpt);
+
+/**
+ * Turns on packet writing for a peer.
+ *
+ * After this function is called, any packets placed on connection->obuf will be
+ * written to connection->fd until no more packets remain.
+ *
+ * Additionally, it becomes unsafe to perform socket actions on connection->fd.
+ *
+ * @param peer - peer to register
+ */
+extern void bgp_writes_on(struct peer_connection *peer);
+
+/**
+ * Turns off packet writing for a peer.
+ *
+ * After this function returns, packets placed on connection->obuf will not be
+ * written to connection->fd by the I/O thread.
+ *
+ * After this function returns it becomes safe to perform socket actions on
+ * connection->fd.
+ *
+ * @param connection - connection to deregister
+ * @param flush - as described
+ */
+extern void bgp_writes_off(struct peer_connection *connection);
+
+/**
+ * Turns on packet reading for a peer.
+ *
+ * After this function is called, any packets received on connection->fd
+ * will be read and copied into the FIFO queue connection->ibuf.
+ *
+ * Additionally, it becomes unsafe to perform socket actions on connection->fd.
+ *
+ * Whenever one or more packets are placed onto connection->ibuf, a task of type
+ * THREAD_EVENT will be placed on the main thread whose handler is
+ *
+ *   bgp_packet.c:bgp_process_packet()
+ *
+ * @param connection - The connection to register
+ */
+extern void bgp_reads_on(struct peer_connection *connection);
+
+/**
+ * Turns off packet reading for a peer.
+ *
+ * After this function is called, any packets received on connection->fd
+ * will not be read by the I/O thread.
+ *
+ * After this function returns it becomes safe to perform socket actions on
+ * connection->fd.
+ *
+ * @param connection - The connection to register for
+ */
+extern void bgp_reads_off(struct peer_connection *connection);
+
+#endif /* _FRR_BGP_IO_H */