-/*
- * Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
+/* Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
*
* Andreas Langer
*
* 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 "hard-interface.h"
-static struct sk_buff *frag_merge_packet(struct list_head *head,
- struct frag_packet_list_entry *tfp,
- struct sk_buff *skb)
+static struct sk_buff *
+batadv_frag_merge_packet(struct list_head *head,
+ struct batadv_frag_packet_list_entry *tfp,
+ struct sk_buff *skb)
{
- struct unicast_frag_packet *up =
- (struct unicast_frag_packet *)skb->data;
+ struct batadv_unicast_frag_packet *up;
struct sk_buff *tmp_skb;
- struct unicast_packet *unicast_packet;
+ struct batadv_unicast_packet *unicast_packet;
int hdr_len = sizeof(*unicast_packet);
int uni_diff = sizeof(*up) - hdr_len;
+ up = (struct batadv_unicast_frag_packet *)skb->data;
/* set skb to the first part and tmp_skb to the second part */
- if (up->flags & UNI_FRAG_HEAD) {
+ if (up->flags & BATADV_UNI_FRAG_HEAD) {
tmp_skb = tfp->skb;
} else {
tmp_skb = skb;
kfree_skb(tmp_skb);
memmove(skb->data + uni_diff, skb->data, hdr_len);
- unicast_packet = (struct unicast_packet *)skb_pull(skb, uni_diff);
- unicast_packet->header.packet_type = BAT_UNICAST;
+ unicast_packet = (struct batadv_unicast_packet *)skb_pull(skb,
+ uni_diff);
+ unicast_packet->header.packet_type = BATADV_UNICAST;
return skb;
return NULL;
}
-static void frag_create_entry(struct list_head *head, struct sk_buff *skb)
+static void batadv_frag_create_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;
+ struct batadv_frag_packet_list_entry *tfp;
+ struct batadv_unicast_frag_packet *up;
+
+ up = (struct batadv_unicast_frag_packet *)skb->data;
/* free and oldest packets stand at the end */
tfp = list_entry((head)->prev, typeof(*tfp), list);
return;
}
-static int frag_create_buffer(struct list_head *head)
+static int batadv_frag_create_buffer(struct list_head *head)
{
int i;
- struct frag_packet_list_entry *tfp;
+ struct batadv_frag_packet_list_entry *tfp;
- for (i = 0; i < FRAG_BUFFER_SIZE; i++) {
+ for (i = 0; i < BATADV_FRAG_BUFFER_SIZE; i++) {
tfp = kmalloc(sizeof(*tfp), GFP_ATOMIC);
if (!tfp) {
- frag_list_free(head);
+ batadv_frag_list_free(head);
return -ENOMEM;
}
tfp->skb = NULL;
return 0;
}
-static struct frag_packet_list_entry *frag_search_packet(struct list_head *head,
- const struct unicast_frag_packet *up)
+static struct batadv_frag_packet_list_entry *
+batadv_frag_search_packet(struct list_head *head,
+ const struct batadv_unicast_frag_packet *up)
{
- struct frag_packet_list_entry *tfp;
- struct unicast_frag_packet *tmp_up = NULL;
+ struct batadv_frag_packet_list_entry *tfp;
+ struct batadv_unicast_frag_packet *tmp_up = NULL;
uint16_t search_seqno;
- if (up->flags & UNI_FRAG_HEAD)
+ if (up->flags & BATADV_UNI_FRAG_HEAD)
search_seqno = ntohs(up->seqno)+1;
else
search_seqno = ntohs(up->seqno)-1;
if (tfp->seqno == ntohs(up->seqno))
goto mov_tail;
- tmp_up = (struct unicast_frag_packet *)tfp->skb->data;
+ tmp_up = (struct batadv_unicast_frag_packet *)tfp->skb->data;
if (tfp->seqno == search_seqno) {
- if ((tmp_up->flags & UNI_FRAG_HEAD) !=
- (up->flags & UNI_FRAG_HEAD))
+ if ((tmp_up->flags & BATADV_UNI_FRAG_HEAD) !=
+ (up->flags & BATADV_UNI_FRAG_HEAD))
return tfp;
else
goto mov_tail;
return NULL;
}
-void frag_list_free(struct list_head *head)
+void batadv_frag_list_free(struct list_head *head)
{
- struct frag_packet_list_entry *pf, *tmp_pf;
+ struct batadv_frag_packet_list_entry *pf, *tmp_pf;
if (!list_empty(head)) {
* or the skb could be reassembled (skb_new will point to the new packet and
* skb was freed)
*/
-int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
- struct sk_buff **new_skb)
+int batadv_frag_reassemble_skb(struct sk_buff *skb,
+ struct batadv_priv *bat_priv,
+ struct sk_buff **new_skb)
{
- struct orig_node *orig_node;
- struct frag_packet_list_entry *tmp_frag_entry;
+ struct batadv_orig_node *orig_node;
+ struct batadv_frag_packet_list_entry *tmp_frag_entry;
int ret = NET_RX_DROP;
- struct unicast_frag_packet *unicast_packet =
- (struct unicast_frag_packet *)skb->data;
+ struct batadv_unicast_frag_packet *unicast_packet;
+ unicast_packet = (struct batadv_unicast_frag_packet *)skb->data;
*new_skb = NULL;
- orig_node = orig_hash_find(bat_priv, unicast_packet->orig);
+ orig_node = batadv_orig_hash_find(bat_priv, unicast_packet->orig);
if (!orig_node)
goto out;
orig_node->last_frag_packet = jiffies;
if (list_empty(&orig_node->frag_list) &&
- frag_create_buffer(&orig_node->frag_list)) {
+ batadv_frag_create_buffer(&orig_node->frag_list)) {
pr_debug("couldn't create frag buffer\n");
goto out;
}
- tmp_frag_entry = frag_search_packet(&orig_node->frag_list,
- unicast_packet);
+ tmp_frag_entry = batadv_frag_search_packet(&orig_node->frag_list,
+ unicast_packet);
if (!tmp_frag_entry) {
- frag_create_entry(&orig_node->frag_list, skb);
+ batadv_frag_create_entry(&orig_node->frag_list, skb);
ret = NET_RX_SUCCESS;
goto out;
}
- *new_skb = frag_merge_packet(&orig_node->frag_list, tmp_frag_entry,
- skb);
+ *new_skb = batadv_frag_merge_packet(&orig_node->frag_list,
+ tmp_frag_entry, skb);
/* if not, merge failed */
if (*new_skb)
ret = NET_RX_SUCCESS;
out:
if (orig_node)
- orig_node_free_ref(orig_node);
+ batadv_orig_node_free_ref(orig_node);
return ret;
}
-int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
- struct hard_iface *hard_iface, const uint8_t dstaddr[])
+int batadv_frag_send_skb(struct sk_buff *skb, struct batadv_priv *bat_priv,
+ struct batadv_hard_iface *hard_iface,
+ const uint8_t dstaddr[])
{
- struct unicast_packet tmp_uc, *unicast_packet;
- struct hard_iface *primary_if;
+ struct batadv_unicast_packet tmp_uc, *unicast_packet;
+ struct batadv_hard_iface *primary_if;
struct sk_buff *frag_skb;
- struct unicast_frag_packet *frag1, *frag2;
+ struct batadv_unicast_frag_packet *frag1, *frag2;
int uc_hdr_len = sizeof(*unicast_packet);
int ucf_hdr_len = sizeof(*frag1);
int data_len = skb->len - uc_hdr_len;
int large_tail = 0, ret = NET_RX_DROP;
uint16_t seqno;
- primary_if = primary_if_get_selected(bat_priv);
+ primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
goto dropped;
goto dropped;
skb_reserve(frag_skb, ucf_hdr_len);
- unicast_packet = (struct unicast_packet *)skb->data;
+ unicast_packet = (struct batadv_unicast_packet *)skb->data;
memcpy(&tmp_uc, unicast_packet, uc_hdr_len);
skb_split(skb, frag_skb, data_len / 2 + uc_hdr_len);
- if (my_skb_head_push(skb, ucf_hdr_len - uc_hdr_len) < 0 ||
- my_skb_head_push(frag_skb, ucf_hdr_len) < 0)
+ if (batadv_skb_head_push(skb, ucf_hdr_len - uc_hdr_len) < 0 ||
+ batadv_skb_head_push(frag_skb, ucf_hdr_len) < 0)
goto drop_frag;
- frag1 = (struct unicast_frag_packet *)skb->data;
- frag2 = (struct unicast_frag_packet *)frag_skb->data;
+ frag1 = (struct batadv_unicast_frag_packet *)skb->data;
+ frag2 = (struct batadv_unicast_frag_packet *)frag_skb->data;
memcpy(frag1, &tmp_uc, sizeof(tmp_uc));
frag1->header.ttl--;
- frag1->header.version = COMPAT_VERSION;
- frag1->header.packet_type = BAT_UNICAST_FRAG;
+ frag1->header.version = BATADV_COMPAT_VERSION;
+ frag1->header.packet_type = BATADV_UNICAST_FRAG;
memcpy(frag1->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
memcpy(frag2, frag1, sizeof(*frag2));
if (data_len & 1)
- large_tail = UNI_FRAG_LARGETAIL;
+ large_tail = BATADV_UNI_FRAG_LARGETAIL;
- frag1->flags = UNI_FRAG_HEAD | large_tail;
+ frag1->flags = BATADV_UNI_FRAG_HEAD | large_tail;
frag2->flags = large_tail;
seqno = atomic_add_return(2, &hard_iface->frag_seqno);
frag1->seqno = htons(seqno - 1);
frag2->seqno = htons(seqno);
- send_skb_packet(skb, hard_iface, dstaddr);
- send_skb_packet(frag_skb, hard_iface, dstaddr);
+ batadv_send_skb_packet(skb, hard_iface, dstaddr);
+ batadv_send_skb_packet(frag_skb, hard_iface, dstaddr);
ret = NET_RX_SUCCESS;
goto out;
kfree_skb(skb);
out:
if (primary_if)
- hardif_free_ref(primary_if);
+ batadv_hardif_free_ref(primary_if);
return ret;
}
-int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
+int batadv_unicast_send_skb(struct sk_buff *skb, struct batadv_priv *bat_priv)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
- struct unicast_packet *unicast_packet;
- struct orig_node *orig_node;
- struct neigh_node *neigh_node;
+ struct batadv_unicast_packet *unicast_packet;
+ struct batadv_orig_node *orig_node;
+ struct batadv_neigh_node *neigh_node;
int data_len = skb->len;
int ret = 1;
+ unsigned int dev_mtu;
/* get routing information */
if (is_multicast_ether_addr(ethhdr->h_dest)) {
- orig_node = gw_get_selected_orig(bat_priv);
+ orig_node = batadv_gw_get_selected_orig(bat_priv);
if (orig_node)
goto find_router;
}
/* check for tt host - increases orig_node refcount.
- * returns NULL in case of AP isolation */
- orig_node = transtable_search(bat_priv, ethhdr->h_source,
- ethhdr->h_dest);
+ * returns NULL in case of AP isolation
+ */
+ orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source,
+ ethhdr->h_dest);
find_router:
- /**
- * find_router():
+ /* find_router():
* - if orig_node is NULL it returns NULL
* - increases neigh_nodes refcount if found.
*/
- neigh_node = find_router(bat_priv, orig_node, NULL);
+ neigh_node = batadv_find_router(bat_priv, orig_node, NULL);
if (!neigh_node)
goto out;
- if (my_skb_head_push(skb, sizeof(*unicast_packet)) < 0)
+ if (batadv_skb_head_push(skb, sizeof(*unicast_packet)) < 0)
goto out;
- unicast_packet = (struct unicast_packet *)skb->data;
+ unicast_packet = (struct batadv_unicast_packet *)skb->data;
- unicast_packet->header.version = COMPAT_VERSION;
+ unicast_packet->header.version = BATADV_COMPAT_VERSION;
/* batman packet type: unicast */
- unicast_packet->header.packet_type = BAT_UNICAST;
+ unicast_packet->header.packet_type = BATADV_UNICAST;
/* set unicast ttl */
- unicast_packet->header.ttl = TTL;
+ unicast_packet->header.ttl = BATADV_TTL;
/* copy the destination for faster routing */
memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
/* set the destination tt version number */
* try to reroute it because the ttvn contained in the header is less
* than the current one
*/
- if (tt_global_client_is_roaming(bat_priv, ethhdr->h_dest))
+ if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest))
unicast_packet->ttvn = unicast_packet->ttvn - 1;
+ dev_mtu = neigh_node->if_incoming->net_dev->mtu;
if (atomic_read(&bat_priv->fragmentation) &&
- data_len + sizeof(*unicast_packet) >
- neigh_node->if_incoming->net_dev->mtu) {
+ data_len + sizeof(*unicast_packet) > dev_mtu) {
/* send frag skb decreases ttl */
unicast_packet->header.ttl++;
- ret = frag_send_skb(skb, bat_priv,
- neigh_node->if_incoming, neigh_node->addr);
+ ret = batadv_frag_send_skb(skb, bat_priv,
+ neigh_node->if_incoming,
+ neigh_node->addr);
goto out;
}
- send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
ret = 0;
goto out;
out:
if (neigh_node)
- neigh_node_free_ref(neigh_node);
+ batadv_neigh_node_free_ref(neigh_node);
if (orig_node)
- orig_node_free_ref(orig_node);
+ batadv_orig_node_free_ref(orig_node);
if (ret == 1)
kfree_skb(skb);
return ret;
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