fragmentation.c (4f2c0a4acffbec01079c28f839422e64ddeff004) fragmentation.c (07afe1ba288c04280622fa002ed385f1ac0b6fe6)
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Martin Hundebøll <martin@hundeboll.net>
5 */
6
7#include "fragmentation.h"
8#include "main.h"

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20#include <linux/skbuff.h>
21#include <linux/slab.h>
22#include <linux/spinlock.h>
23#include <linux/string.h>
24#include <uapi/linux/batadv_packet.h>
25
26#include "hard-interface.h"
27#include "originator.h"
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Martin Hundebøll <martin@hundeboll.net>
5 */
6
7#include "fragmentation.h"
8#include "main.h"

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20#include <linux/skbuff.h>
21#include <linux/slab.h>
22#include <linux/spinlock.h>
23#include <linux/string.h>
24#include <uapi/linux/batadv_packet.h>
25
26#include "hard-interface.h"
27#include "originator.h"
28#include "routing.h"
29#include "send.h"
30
31/**
32 * batadv_frag_clear_chain() - delete entries in the fragment buffer chain
33 * @head: head of chain with entries.
34 * @dropped: whether the chain is cleared because all fragments are dropped
35 *
36 * Free fragments in the passed hlist. Should be called with appropriate lock.

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346 *
347 * Return: true if the fragment is consumed/forwarded, false otherwise.
348 */
349bool batadv_frag_skb_fwd(struct sk_buff *skb,
350 struct batadv_hard_iface *recv_if,
351 struct batadv_orig_node *orig_node_src)
352{
353 struct batadv_priv *bat_priv = netdev_priv(recv_if->soft_iface);
28#include "send.h"
29
30/**
31 * batadv_frag_clear_chain() - delete entries in the fragment buffer chain
32 * @head: head of chain with entries.
33 * @dropped: whether the chain is cleared because all fragments are dropped
34 *
35 * Free fragments in the passed hlist. Should be called with appropriate lock.

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345 *
346 * Return: true if the fragment is consumed/forwarded, false otherwise.
347 */
348bool batadv_frag_skb_fwd(struct sk_buff *skb,
349 struct batadv_hard_iface *recv_if,
350 struct batadv_orig_node *orig_node_src)
351{
352 struct batadv_priv *bat_priv = netdev_priv(recv_if->soft_iface);
354 struct batadv_orig_node *orig_node_dst;
355 struct batadv_neigh_node *neigh_node = NULL;
356 struct batadv_frag_packet *packet;
357 u16 total_size;
358 bool ret = false;
359
360 packet = (struct batadv_frag_packet *)skb->data;
353 struct batadv_neigh_node *neigh_node = NULL;
354 struct batadv_frag_packet *packet;
355 u16 total_size;
356 bool ret = false;
357
358 packet = (struct batadv_frag_packet *)skb->data;
361 orig_node_dst = batadv_orig_hash_find(bat_priv, packet->dest);
362 if (!orig_node_dst)
363 goto out;
364
359
365 neigh_node = batadv_find_router(bat_priv, orig_node_dst, recv_if);
360 neigh_node = batadv_orig_to_router(bat_priv, packet->dest, recv_if);
366 if (!neigh_node)
367 goto out;
368
369 /* Forward the fragment, if the merged packet would be too big to
370 * be assembled.
371 */
372 total_size = ntohs(packet->total_size);
373 if (total_size > neigh_node->if_incoming->net_dev->mtu) {
374 batadv_inc_counter(bat_priv, BATADV_CNT_FRAG_FWD);
375 batadv_add_counter(bat_priv, BATADV_CNT_FRAG_FWD_BYTES,
376 skb->len + ETH_HLEN);
377
378 packet->ttl--;
379 batadv_send_unicast_skb(skb, neigh_node);
380 ret = true;
381 }
382
383out:
361 if (!neigh_node)
362 goto out;
363
364 /* Forward the fragment, if the merged packet would be too big to
365 * be assembled.
366 */
367 total_size = ntohs(packet->total_size);
368 if (total_size > neigh_node->if_incoming->net_dev->mtu) {
369 batadv_inc_counter(bat_priv, BATADV_CNT_FRAG_FWD);
370 batadv_add_counter(bat_priv, BATADV_CNT_FRAG_FWD_BYTES,
371 skb->len + ETH_HLEN);
372
373 packet->ttl--;
374 batadv_send_unicast_skb(skb, neigh_node);
375 ret = true;
376 }
377
378out:
384 batadv_orig_node_put(orig_node_dst);
385 batadv_neigh_node_put(neigh_node);
386 return ret;
387}
388
389/**
390 * batadv_frag_create() - create a fragment from skb
391 * @net_dev: outgoing device for fragment
392 * @skb: skb to create fragment from

--- 170 unchanged lines hidden --- 		379 batadv_neigh_node_put(neigh_node);
380 return ret;
381}
382
383/**
384 * batadv_frag_create() - create a fragment from skb
385 * @net_dev: outgoing device for fragment
386 * @skb: skb to create fragment from

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