linux/net/rxrpc/peer_event.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* Peer event handling, typically ICMP messages.
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#include <linux/module.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <linux/errqueue.h>
#include <linux/udp.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/icmp.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include <net/ip.h>
#include "ar-internal.h"

static void rxrpc_store_error(struct rxrpc_peer *, struct sk_buff *);
static void rxrpc_distribute_error(struct rxrpc_peer *, struct sk_buff *,
				   enum rxrpc_call_completion, int);

/*
 * Find the peer associated with a local error.
 */
static struct rxrpc_peer *rxrpc_lookup_peer_local_rcu(struct rxrpc_local *local,
						      const struct sk_buff *skb,
						      struct sockaddr_rxrpc *srx)
{ … }

/*
 * Handle an MTU/fragmentation problem.
 */
static void rxrpc_adjust_mtu(struct rxrpc_peer *peer, unsigned int mtu)
{ … }

/*
 * Handle an error received on the local endpoint.
 */
void rxrpc_input_error(struct rxrpc_local *local, struct sk_buff *skb)
{ … }

/*
 * Map an error report to error codes on the peer record.
 */
static void rxrpc_store_error(struct rxrpc_peer *peer, struct sk_buff *skb)
{ … }

/*
 * Distribute an error that occurred on a peer.
 */
static void rxrpc_distribute_error(struct rxrpc_peer *peer, struct sk_buff *skb,
				   enum rxrpc_call_completion compl, int err)
{ … }

/*
 * Perform keep-alive pings.
 */
static void rxrpc_peer_keepalive_dispatch(struct rxrpc_net *rxnet,
					  struct list_head *collector,
					  time64_t base,
					  u8 cursor)
{ … }

/*
 * Perform keep-alive pings with VERSION packets to keep any NAT alive.
 */
void rxrpc_peer_keepalive_worker(struct work_struct *work)
{ … }