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-rw-r--r--drivers/staging/batman-adv/unicast.c269
1 files changed, 0 insertions, 269 deletions
diff --git a/drivers/staging/batman-adv/unicast.c b/drivers/staging/batman-adv/unicast.c
deleted file mode 100644
index 0459413ff67f..000000000000
--- a/drivers/staging/batman-adv/unicast.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
- * Copyright (C) 2010 B.A.T.M.A.N. contributors:
- *
- * Andreas Langer
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA
- *
- */
-
-#include "main.h"
-#include "unicast.h"
-#include "send.h"
-#include "soft-interface.h"
-#include "hash.h"
-#include "translation-table.h"
-#include "routing.h"
-#include "hard-interface.h"
-
-
-struct sk_buff *merge_frag_packet(struct list_head *head,
- struct frag_packet_list_entry *tfp,
- struct sk_buff *skb)
-{
- struct unicast_frag_packet *up =
- (struct unicast_frag_packet *)skb->data;
- struct sk_buff *tmp_skb;
-
- /* set skb to the first part and tmp_skb to the second part */
- if (up->flags & UNI_FRAG_HEAD) {
- tmp_skb = tfp->skb;
- } else {
- tmp_skb = skb;
- skb = tfp->skb;
- }
-
- skb_pull(tmp_skb, sizeof(struct unicast_frag_packet));
- if (pskb_expand_head(skb, 0, tmp_skb->len, GFP_ATOMIC) < 0) {
- /* free buffered skb, skb will be freed later */
- kfree_skb(tfp->skb);
- return NULL;
- }
-
- /* move free entry to end */
- tfp->skb = NULL;
- tfp->seqno = 0;
- list_move_tail(&tfp->list, head);
-
- memcpy(skb_put(skb, tmp_skb->len), tmp_skb->data, tmp_skb->len);
- kfree_skb(tmp_skb);
- return skb;
-}
-
-void create_frag_entry(struct list_head *head, struct sk_buff *skb)
-{
- struct frag_packet_list_entry *tfp;
- struct unicast_frag_packet *up =
- (struct unicast_frag_packet *)skb->data;
-
- /* free and oldest packets stand at the end */
- tfp = list_entry((head)->prev, typeof(*tfp), list);
- kfree_skb(tfp->skb);
-
- tfp->seqno = ntohs(up->seqno);
- tfp->skb = skb;
- list_move(&tfp->list, head);
- return;
-}
-
-int create_frag_buffer(struct list_head *head)
-{
- int i;
- struct frag_packet_list_entry *tfp;
-
- for (i = 0; i < FRAG_BUFFER_SIZE; i++) {
- tfp = kmalloc(sizeof(struct frag_packet_list_entry),
- GFP_ATOMIC);
- if (!tfp) {
- frag_list_free(head);
- return -ENOMEM;
- }
- tfp->skb = NULL;
- tfp->seqno = 0;
- INIT_LIST_HEAD(&tfp->list);
- list_add(&tfp->list, head);
- }
-
- return 0;
-}
-
-struct frag_packet_list_entry *search_frag_packet(struct list_head *head,
- struct unicast_frag_packet *up)
-{
- struct frag_packet_list_entry *tfp;
- struct unicast_frag_packet *tmp_up = NULL;
- uint16_t search_seqno;
-
- if (up->flags & UNI_FRAG_HEAD)
- search_seqno = ntohs(up->seqno)+1;
- else
- search_seqno = ntohs(up->seqno)-1;
-
- list_for_each_entry(tfp, head, list) {
-
- if (!tfp->skb)
- continue;
-
- if (tfp->seqno == ntohs(up->seqno))
- goto mov_tail;
-
- tmp_up = (struct unicast_frag_packet *)tfp->skb->data;
-
- if (tfp->seqno == search_seqno) {
-
- if ((tmp_up->flags & UNI_FRAG_HEAD) !=
- (up->flags & UNI_FRAG_HEAD))
- return tfp;
- else
- goto mov_tail;
- }
- }
- return NULL;
-
-mov_tail:
- list_move_tail(&tfp->list, head);
- return NULL;
-}
-
-void frag_list_free(struct list_head *head)
-{
- struct frag_packet_list_entry *pf, *tmp_pf;
-
- if (!list_empty(head)) {
-
- list_for_each_entry_safe(pf, tmp_pf, head, list) {
- kfree_skb(pf->skb);
- list_del(&pf->list);
- kfree(pf);
- }
- }
- return;
-}
-
-static int unicast_send_frag_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
- struct batman_if *batman_if, uint8_t dstaddr[],
- struct orig_node *orig_node)
-{
- struct unicast_frag_packet *ucast_frag1, *ucast_frag2;
- int hdr_len = sizeof(struct unicast_frag_packet);
- struct sk_buff *frag_skb;
- int data_len = skb->len;
-
- if (!bat_priv->primary_if)
- goto dropped;
-
- frag_skb = dev_alloc_skb(data_len - (data_len / 2) + hdr_len);
- skb_split(skb, frag_skb, data_len / 2);
-
- if (my_skb_head_push(frag_skb, hdr_len) < 0 ||
- my_skb_head_push(skb, hdr_len) < 0)
- goto drop_frag;
-
- ucast_frag1 = (struct unicast_frag_packet *)skb->data;
- ucast_frag2 = (struct unicast_frag_packet *)frag_skb->data;
-
- ucast_frag1->version = COMPAT_VERSION;
- ucast_frag1->packet_type = BAT_UNICAST_FRAG;
- ucast_frag1->ttl = TTL;
- memcpy(ucast_frag1->orig,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
- memcpy(ucast_frag1->dest, orig_node->orig, ETH_ALEN);
-
- memcpy(ucast_frag2, ucast_frag1, sizeof(struct unicast_frag_packet));
-
- ucast_frag1->flags |= UNI_FRAG_HEAD;
- ucast_frag2->flags &= ~UNI_FRAG_HEAD;
-
- ucast_frag1->seqno = htons((uint16_t)atomic_inc_return(
- &batman_if->frag_seqno));
-
- ucast_frag2->seqno = htons((uint16_t)atomic_inc_return(
- &batman_if->frag_seqno));
-
- send_skb_packet(skb, batman_if, dstaddr);
- send_skb_packet(frag_skb, batman_if, dstaddr);
- return 0;
-
-drop_frag:
- kfree_skb(frag_skb);
-dropped:
- kfree_skb(skb);
- return 1;
-}
-
-int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
-{
- struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
- struct unicast_packet *unicast_packet;
- struct orig_node *orig_node;
- struct batman_if *batman_if;
- struct neigh_node *router;
- int data_len = skb->len;
- uint8_t dstaddr[6];
- unsigned long flags;
-
- spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
-
- /* get routing information */
- orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
- ethhdr->h_dest));
-
- /* check for hna host */
- if (!orig_node)
- orig_node = transtable_search(bat_priv, ethhdr->h_dest);
-
- router = find_router(bat_priv, orig_node, NULL);
-
- if (!router)
- goto unlock;
-
- /* don't lock while sending the packets ... we therefore
- * copy the required data before sending */
-
- batman_if = router->if_incoming;
- memcpy(dstaddr, router->addr, ETH_ALEN);
-
- spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
-
- if (batman_if->if_status != IF_ACTIVE)
- goto dropped;
-
- if (atomic_read(&bat_priv->frag_enabled) &&
- data_len + sizeof(struct unicast_packet) > batman_if->net_dev->mtu)
- return unicast_send_frag_skb(skb, bat_priv, batman_if,
- dstaddr, orig_node);
-
- if (my_skb_head_push(skb, sizeof(struct unicast_packet)) < 0)
- goto dropped;
-
- unicast_packet = (struct unicast_packet *)skb->data;
-
- unicast_packet->version = COMPAT_VERSION;
- /* batman packet type: unicast */
- unicast_packet->packet_type = BAT_UNICAST;
- /* set unicast ttl */
- unicast_packet->ttl = TTL;
- /* copy the destination for faster routing */
- memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
-
- send_skb_packet(skb, batman_if, dstaddr);
- return 0;
-
-unlock:
- spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
-dropped:
- kfree_skb(skb);
- return 1;
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.