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// 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"
/**
* 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 peer->obuf will be
* written to peer->fd until no more packets remain.
*
* Additionally, it becomes unsafe to perform socket actions on peer->fd.
*
* @param peer - peer to register
*/
extern void bgp_writes_on(struct peer *peer);
/**
* Turns off packet writing for a peer.
*
* After this function returns, packets placed on peer->obuf will not be
* written to peer->fd by the I/O thread.
*
* After this function returns it becomes safe to perform socket actions on
* peer->fd.
*
* @param peer - peer to deregister
* @param flush - as described
*/
extern void bgp_writes_off(struct peer *peer);
/**
* Turns on packet reading for a peer.
*
* After this function is called, any packets received on peer->fd will be read
* and copied into the FIFO queue peer->ibuf.
*
* Additionally, it becomes unsafe to perform socket actions on peer->fd.
*
* Whenever one or more packets are placed onto peer->ibuf, a task of type
* THREAD_EVENT will be placed on the main thread whose handler is
*
* bgp_packet.c:bgp_process_packet()
*
* @param peer - peer to register
*/
extern void bgp_reads_on(struct peer *peer);
/**
* Turns off packet reading for a peer.
*
* After this function is called, any packets received on peer->fd will not be
* read by the I/O thread.
*
* After this function returns it becomes safe to perform socket actions on
* peer->fd.
*
* @param peer - peer to deregister
*/
extern void bgp_reads_off(struct peer *peer);
#endif /* _FRR_BGP_IO_H */
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