*
*/
-
-
-
-
#include "main.h"
#include "routing.h"
-#include "log.h"
#include "send.h"
+#include "hash.h"
#include "soft-interface.h"
#include "hard-interface.h"
#include "device.h"
#include "translation-table.h"
+#include "originator.h"
#include "types.h"
-#include "hash.h"
#include "ring_buffer.h"
#include "vis.h"
#include "aggregation.h"
-#include "compat.h"
-
-
DECLARE_WAIT_QUEUE_HEAD(thread_wait);
-static DECLARE_DELAYED_WORK(purge_orig_wq, purge_orig);
-
-static atomic_t data_ready_cond;
-atomic_t exit_cond;
-
-static void start_purge_timer(void)
-{
- queue_delayed_work(bat_event_workqueue, &purge_orig_wq, 1 * HZ);
-}
-
-int originator_init(void)
-{
- if (orig_hash)
- return 1;
-
- spin_lock(&orig_hash_lock);
- orig_hash = hash_new(128, compare_orig, choose_orig);
-
- if (!orig_hash)
- goto err;
-
- spin_unlock(&orig_hash_lock);
- start_purge_timer();
- return 1;
-
-err:
- spin_unlock(&orig_hash_lock);
- return 0;
-}
-
-void originator_free(void)
-{
- if (!orig_hash)
- return;
-
- cancel_delayed_work_sync(&purge_orig_wq);
-
- spin_lock(&orig_hash_lock);
- hash_delete(orig_hash, free_orig_node);
- orig_hash = NULL;
- spin_unlock(&orig_hash_lock);
-}
-static struct neigh_node *create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node, uint8_t *neigh, struct batman_if *if_incoming)
+void slide_own_bcast_window(struct batman_if *batman_if)
{
- struct neigh_node *neigh_node;
+ HASHIT(hashit);
+ struct orig_node *orig_node;
+ TYPE_OF_WORD *word;
+ unsigned long flags;
- debug_log(LOG_TYPE_BATMAN, "Creating new last-hop neighbour of originator\n");
+ spin_lock_irqsave(&orig_hash_lock, flags);
- neigh_node = kmalloc(sizeof(struct neigh_node), GFP_ATOMIC);
- memset(neigh_node, 0, sizeof(struct neigh_node));
- INIT_LIST_HEAD(&neigh_node->list);
+ while (hash_iterate(orig_hash, &hashit)) {
+ orig_node = hashit.bucket->data;
+ word = &(orig_node->bcast_own[batman_if->if_num * NUM_WORDS]);
- memcpy(neigh_node->addr, neigh, ETH_ALEN);
- neigh_node->orig_node = orig_neigh_node;
- neigh_node->if_incoming = if_incoming;
+ bit_get_packet(word, 1, 0);
+ orig_node->bcast_own_sum[batman_if->if_num] =
+ bit_packet_count(word);
+ }
- list_add_tail(&neigh_node->list, &orig_node->neigh_list);
- return neigh_node;
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
}
-void free_orig_node(void *data)
+static void update_HNA(struct orig_node *orig_node,
+ unsigned char *hna_buff, int hna_buff_len)
{
- struct list_head *list_pos, *list_pos_tmp;
- struct neigh_node *neigh_node;
- struct orig_node *orig_node = (struct orig_node *)data;
+ if ((hna_buff_len != orig_node->hna_buff_len) ||
+ ((hna_buff_len > 0) &&
+ (orig_node->hna_buff_len > 0) &&
+ (memcmp(orig_node->hna_buff, hna_buff, hna_buff_len) != 0))) {
- /* for all neighbours towards this originator ... */
- list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
- neigh_node = list_entry(list_pos, struct neigh_node, list);
+ if (orig_node->hna_buff_len > 0)
+ hna_global_del_orig(orig_node,
+ "originator changed hna");
- list_del(list_pos);
- kfree(neigh_node);
+ if ((hna_buff_len > 0) && (hna_buff != NULL))
+ hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
}
-
- hna_global_del_orig(orig_node, "originator timed out");
-
- kfree(orig_node->bcast_own);
- kfree(orig_node->bcast_own_sum);
- kfree(orig_node);
}
-/* this function finds or creates an originator entry for the given address if it does not exits */
-static struct orig_node *get_orig_node(uint8_t *addr)
+static void update_route(struct orig_node *orig_node,
+ struct neigh_node *neigh_node,
+ unsigned char *hna_buff, int hna_buff_len)
{
- struct orig_node *orig_node;
- struct hashtable_t *swaphash;
- char orig_str[ETH_STR_LEN];
-
- orig_node = ((struct orig_node *)hash_find(orig_hash, addr));
-
- if (orig_node != NULL)
- return orig_node;
-
- addr_to_string(orig_str, addr);
- debug_log(LOG_TYPE_BATMAN, "Creating new originator: %s \n", orig_str);
-
- orig_node = kmalloc(sizeof(struct orig_node), GFP_ATOMIC);
- memset(orig_node, 0, sizeof(struct orig_node));
- INIT_LIST_HEAD(&orig_node->neigh_list);
-
- memcpy(orig_node->orig, addr, ETH_ALEN);
- orig_node->router = NULL;
- orig_node->batman_if = NULL;
- orig_node->hna_buff = NULL;
+ /* route deleted */
+ if ((orig_node->router != NULL) && (neigh_node == NULL)) {
- orig_node->bcast_own = kmalloc(num_ifs * sizeof(TYPE_OF_WORD) * NUM_WORDS, GFP_ATOMIC);
- memset(orig_node->bcast_own, 0, num_ifs * sizeof(TYPE_OF_WORD) * NUM_WORDS);
+ bat_dbg(DBG_ROUTES, "Deleting route towards: %pM\n",
+ orig_node->orig);
+ hna_global_del_orig(orig_node, "originator timed out");
- orig_node->bcast_own_sum = kmalloc(num_ifs * sizeof(uint8_t), GFP_ATOMIC);
- memset(orig_node->bcast_own_sum, 0, num_ifs * sizeof(uint8_t));
-
- hash_add(orig_hash, orig_node);
+ /* route added */
+ } else if ((orig_node->router == NULL) && (neigh_node != NULL)) {
- if (orig_hash->elements * 4 > orig_hash->size) {
- swaphash = hash_resize(orig_hash, orig_hash->size * 2);
+ bat_dbg(DBG_ROUTES,
+ "Adding route towards: %pM (via %pM)\n",
+ orig_node->orig, neigh_node->addr);
+ hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
- if (swaphash == NULL)
- debug_log(LOG_TYPE_CRIT, "Couldn't resize orig hash table \n");
- else
- orig_hash = swaphash;
+ /* route changed */
+ } else {
+ bat_dbg(DBG_ROUTES, "Changing route towards: %pM (now via %pM - was via %pM)\n", orig_node->orig, neigh_node->addr, orig_node->router->addr);
}
- return orig_node;
-}
-
-void slide_own_bcast_window(struct batman_if *batman_if)
-{
- struct hash_it_t *hashit = NULL;
- struct orig_node *orig_node;
-
- spin_lock(&orig_hash_lock);
-
- while (NULL != (hashit = hash_iterate(orig_hash, hashit))) {
- orig_node = hashit->bucket->data;
-
- bit_get_packet((TYPE_OF_WORD *)&(orig_node->bcast_own[batman_if->if_num * NUM_WORDS]), 1, 0);
- orig_node->bcast_own_sum[batman_if->if_num] = bit_packet_count((TYPE_OF_WORD *)&(orig_node->bcast_own[batman_if->if_num * NUM_WORDS]));
- }
+ if (neigh_node != NULL)
+ orig_node->batman_if = neigh_node->if_incoming;
+ else
+ orig_node->batman_if = NULL;
- spin_unlock(&orig_hash_lock);
+ orig_node->router = neigh_node;
}
-static void update_routes(struct orig_node *orig_node, struct neigh_node *neigh_node, unsigned char *hna_buff, int hna_buff_len)
+
+void update_routes(struct orig_node *orig_node,
+ struct neigh_node *neigh_node,
+ unsigned char *hna_buff, int hna_buff_len)
{
- char orig_str[ETH_STR_LEN], neigh_str[ETH_STR_LEN], router_str[ETH_STR_LEN];
if (orig_node == NULL)
return;
- if (orig_node->router != neigh_node) {
- addr_to_string(orig_str, orig_node->orig);
-
- /* route deleted */
- if ((orig_node->router != NULL) && (neigh_node == NULL)) {
-
- debug_log(LOG_TYPE_ROUTES, "Deleting route towards: %s\n", orig_str);
- hna_global_del_orig(orig_node, "originator timed out");
-
- /* route added */
- } else if ((orig_node->router == NULL) && (neigh_node != NULL)) {
-
- addr_to_string(neigh_str, neigh_node->addr);
- debug_log(LOG_TYPE_ROUTES, "Adding route towards: %s (via %s)\n", orig_str, neigh_str);
- hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
-
- /* route changed */
- } else {
-
- addr_to_string(neigh_str, neigh_node->addr);
- addr_to_string(router_str, orig_node->router->addr);
- debug_log(LOG_TYPE_ROUTES, "Changing route towards: %s (now via %s - was via %s)\n", orig_str, neigh_str, router_str);
-
- }
-
- if (neigh_node != NULL)
- orig_node->batman_if = neigh_node->if_incoming;
- else
- orig_node->batman_if = NULL;
-
- orig_node->router = neigh_node;
-
+ if (orig_node->router != neigh_node)
+ update_route(orig_node, neigh_node, hna_buff, hna_buff_len);
/* may be just HNA changed */
- } else {
-
- if ((hna_buff_len != orig_node->hna_buff_len) || ((hna_buff_len > 0) && (orig_node->hna_buff_len > 0) && (memcmp(orig_node->hna_buff, hna_buff, hna_buff_len) != 0))) {
-
- if (orig_node->hna_buff_len > 0)
- hna_global_del_orig(orig_node, "originator changed hna");
-
- if ((hna_buff_len > 0) && (hna_buff != NULL))
- hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
-
- }
-
- }
+ else
+ update_HNA(orig_node, hna_buff, hna_buff_len);
}
-static int isBidirectionalNeigh(struct orig_node *orig_node, struct orig_node *orig_neigh_node, struct batman_packet *batman_packet, struct batman_if *if_incoming)
+static int isBidirectionalNeigh(struct orig_node *orig_node,
+ struct orig_node *orig_neigh_node,
+ struct batman_packet *batman_packet,
+ struct batman_if *if_incoming)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
- char orig_str[ETH_STR_LEN], neigh_str[ETH_STR_LEN];
unsigned char total_count;
- addr_to_string(orig_str, orig_node->orig);
- addr_to_string(neigh_str, orig_neigh_node->orig);
-
if (orig_node == orig_neigh_node) {
- list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
+ list_for_each_entry(tmp_neigh_node,
+ &orig_node->neigh_list,
+ list) {
- if (compare_orig(tmp_neigh_node->addr, orig_neigh_node->orig) && (tmp_neigh_node->if_incoming == if_incoming))
+ if (compare_orig(tmp_neigh_node->addr,
+ orig_neigh_node->orig) &&
+ (tmp_neigh_node->if_incoming == if_incoming))
neigh_node = tmp_neigh_node;
}
- if (neigh_node == NULL)
- neigh_node = create_neighbor(orig_node, orig_neigh_node, orig_neigh_node->orig, if_incoming);
+ if (!neigh_node)
+ neigh_node = create_neighbor(orig_node,
+ orig_neigh_node,
+ orig_neigh_node->orig,
+ if_incoming);
+ /* create_neighbor failed, return 0 */
+ if (!neigh_node)
+ return 0;
neigh_node->last_valid = jiffies;
} else {
/* find packet count of corresponding one hop neighbor */
- list_for_each_entry(tmp_neigh_node, &orig_neigh_node->neigh_list, list) {
+ list_for_each_entry(tmp_neigh_node,
+ &orig_neigh_node->neigh_list, list) {
- if (compare_orig(tmp_neigh_node->addr, orig_neigh_node->orig) && (tmp_neigh_node->if_incoming == if_incoming))
+ if (compare_orig(tmp_neigh_node->addr,
+ orig_neigh_node->orig) &&
+ (tmp_neigh_node->if_incoming == if_incoming))
neigh_node = tmp_neigh_node;
}
- if (neigh_node == NULL)
- neigh_node = create_neighbor(orig_neigh_node, orig_neigh_node, orig_neigh_node->orig, if_incoming);
+ if (!neigh_node)
+ neigh_node = create_neighbor(orig_neigh_node,
+ orig_neigh_node,
+ orig_neigh_node->orig,
+ if_incoming);
+ /* create_neighbor failed, return 0 */
+ if (!neigh_node)
+ return 0;
}
orig_node->last_valid = jiffies;
/* pay attention to not get a value bigger than 100 % */
- total_count = (orig_neigh_node->bcast_own_sum[if_incoming->if_num] > neigh_node->real_packet_count ? neigh_node->real_packet_count : orig_neigh_node->bcast_own_sum[if_incoming->if_num]);
+ total_count = (orig_neigh_node->bcast_own_sum[if_incoming->if_num] >
+ neigh_node->real_packet_count ?
+ neigh_node->real_packet_count :
+ orig_neigh_node->bcast_own_sum[if_incoming->if_num]);
/* if we have too few packets (too less data) we set tq_own to zero */
/* if we receive too few packets it is not considered bidirectional */
- if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) || (neigh_node->real_packet_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
+ if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
+ (neigh_node->real_packet_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
orig_neigh_node->tq_own = 0;
else
- /* neigh_node->real_packet_count is never zero as we only purge old information when getting new information */
- orig_neigh_node->tq_own = (TQ_MAX_VALUE * total_count) / neigh_node->real_packet_count;
+ /* neigh_node->real_packet_count is never zero as we
+ * only purge old information when getting new
+ * information */
+ orig_neigh_node->tq_own = (TQ_MAX_VALUE * total_count) /
+ neigh_node->real_packet_count;
/*
- * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE
- * this does affect the nearly-symmetric links only a little,
- * but punishes asymmetric links more.
- * this will give a value between 0 and TQ_MAX_VALUE
+ * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
+ * affect the nearly-symmetric links only a little, but
+ * punishes asymmetric links more. This will give a value
+ * between 0 and TQ_MAX_VALUE
*/
- orig_neigh_node->tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE *
- (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
- (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
- (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count)) /
- (TQ_LOCAL_WINDOW_SIZE * TQ_LOCAL_WINDOW_SIZE * TQ_LOCAL_WINDOW_SIZE);
-
- batman_packet->tq = ((batman_packet->tq * orig_neigh_node->tq_own * orig_neigh_node->tq_asym_penalty) / (TQ_MAX_VALUE * TQ_MAX_VALUE));
-
- debug_log(LOG_TYPE_BATMAN, "bidirectional: orig = %-15s neigh = %-15s => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i \n",
- orig_str, neigh_str, total_count, neigh_node->real_packet_count, orig_neigh_node->tq_own, orig_neigh_node->tq_asym_penalty, batman_packet->tq);
-
- /* if link has the minimum required transmission quality consider it bidirectional */
+ orig_neigh_node->tq_asym_penalty =
+ TQ_MAX_VALUE -
+ (TQ_MAX_VALUE *
+ (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
+ (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
+ (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count)) /
+ (TQ_LOCAL_WINDOW_SIZE *
+ TQ_LOCAL_WINDOW_SIZE *
+ TQ_LOCAL_WINDOW_SIZE);
+
+ batman_packet->tq = ((batman_packet->tq *
+ orig_neigh_node->tq_own *
+ orig_neigh_node->tq_asym_penalty) /
+ (TQ_MAX_VALUE * TQ_MAX_VALUE));
+
+ bat_dbg(DBG_BATMAN, "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i \n",
+ orig_node->orig, orig_neigh_node->orig, total_count,
+ neigh_node->real_packet_count, orig_neigh_node->tq_own,
+ orig_neigh_node->tq_asym_penalty, batman_packet->tq);
+
+ /* if link has the minimum required transmission quality
+ * consider it bidirectional */
if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
return 1;
return 0;
}
-static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr, struct batman_packet *batman_packet, struct batman_if *if_incoming, unsigned char *hna_buff, int hna_buff_len, char is_duplicate)
+static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ struct batman_if *if_incoming,
+ unsigned char *hna_buff, int hna_buff_len,
+ char is_duplicate)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
int tmp_hna_buff_len;
- debug_log(LOG_TYPE_BATMAN, "update_originator(): Searching and updating originator entry of received packet \n");
+ bat_dbg(DBG_BATMAN, "update_originator(): Searching and updating originator entry of received packet \n");
list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
- if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) && (tmp_neigh_node->if_incoming == if_incoming)) {
+ if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
+ (tmp_neigh_node->if_incoming == if_incoming)) {
neigh_node = tmp_neigh_node;
continue;
}
if (is_duplicate)
continue;
- ring_buffer_set(tmp_neigh_node->tq_recv, &tmp_neigh_node->tq_index, 0);
- tmp_neigh_node->tq_avg = ring_buffer_avg(tmp_neigh_node->tq_recv);
+ ring_buffer_set(tmp_neigh_node->tq_recv,
+ &tmp_neigh_node->tq_index, 0);
+ tmp_neigh_node->tq_avg =
+ ring_buffer_avg(tmp_neigh_node->tq_recv);
}
- if (neigh_node == NULL)
- neigh_node = create_neighbor(orig_node, get_orig_node(ethhdr->h_source), ethhdr->h_source, if_incoming);
- else
- debug_log(LOG_TYPE_BATMAN, "Updating existing last-hop neighbour of originator\n");
+ if (!neigh_node) {
+ struct orig_node *orig_tmp;
+
+ orig_tmp = get_orig_node(ethhdr->h_source);
+ if (!orig_tmp)
+ return;
+
+ neigh_node = create_neighbor(orig_node,
+ orig_tmp,
+ ethhdr->h_source, if_incoming);
+ if (!neigh_node)
+ return;
+ } else
+ bat_dbg(DBG_BATMAN,
+ "Updating existing last-hop neighbor of originator\n");
orig_node->flags = batman_packet->flags;
neigh_node->last_valid = jiffies;
- ring_buffer_set(neigh_node->tq_recv, &neigh_node->tq_index, batman_packet->tq);
+ ring_buffer_set(neigh_node->tq_recv,
+ &neigh_node->tq_index,
+ batman_packet->tq);
neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
if (!is_duplicate) {
neigh_node->last_ttl = batman_packet->ttl;
}
- tmp_hna_buff_len = (hna_buff_len > batman_packet->num_hna * ETH_ALEN ? batman_packet->num_hna * ETH_ALEN : hna_buff_len);
+ tmp_hna_buff_len = (hna_buff_len > batman_packet->num_hna * ETH_ALEN ?
+ batman_packet->num_hna * ETH_ALEN : hna_buff_len);
- /* if this neighbor already is our next hop there is nothing to change */
+ /* if this neighbor already is our next hop there is nothing
+ * to change */
if (orig_node->router == neigh_node)
goto update_hna;
(orig_node->router->tq_avg > neigh_node->tq_avg))
goto update_hna;
- /* if the TQ is the same and the link not more symetric we won't consider it either */
+ /* if the TQ is the same and the link not more symetric we
+ * won't consider it either */
if ((orig_node->router) &&
((neigh_node->tq_avg == orig_node->router->tq_avg) &&
- (orig_node->router->orig_node->bcast_own_sum[if_incoming->if_num] >=
- neigh_node->orig_node->bcast_own_sum[if_incoming->if_num])))
+ (orig_node->router->orig_node->bcast_own_sum[if_incoming->if_num]
+ >= neigh_node->orig_node->bcast_own_sum[if_incoming->if_num])))
goto update_hna;
update_routes(orig_node, neigh_node, hna_buff, tmp_hna_buff_len);
update_hna:
update_routes(orig_node, orig_node->router, hna_buff, tmp_hna_buff_len);
- return;
}
-static char count_real_packets(struct ethhdr *ethhdr, struct batman_packet *batman_packet, struct batman_if *if_incoming)
+static char count_real_packets(struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ struct batman_if *if_incoming)
{
struct orig_node *orig_node;
struct neigh_node *tmp_neigh_node;
char is_duplicate = 0;
-
+ uint16_t seq_diff;
orig_node = get_orig_node(batman_packet->orig);
if (orig_node == NULL)
return 0;
-
list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
if (!is_duplicate)
- is_duplicate = get_bit_status(tmp_neigh_node->real_bits, orig_node->last_real_seqno, batman_packet->seqno);
-
- if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) && (tmp_neigh_node->if_incoming == if_incoming))
- bit_get_packet(tmp_neigh_node->real_bits, batman_packet->seqno - orig_node->last_real_seqno, 1);
+ is_duplicate =
+ get_bit_status(tmp_neigh_node->real_bits,
+ orig_node->last_real_seqno,
+ batman_packet->seqno);
+ seq_diff = batman_packet->seqno - orig_node->last_real_seqno;
+ if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
+ (tmp_neigh_node->if_incoming == if_incoming))
+ bit_get_packet(tmp_neigh_node->real_bits, seq_diff, 1);
else
- bit_get_packet(tmp_neigh_node->real_bits, batman_packet->seqno - orig_node->last_real_seqno, 0);
+ bit_get_packet(tmp_neigh_node->real_bits, seq_diff, 0);
- tmp_neigh_node->real_packet_count = bit_packet_count(tmp_neigh_node->real_bits);
+ tmp_neigh_node->real_packet_count =
+ bit_packet_count(tmp_neigh_node->real_bits);
}
if (!is_duplicate) {
- debug_log(LOG_TYPE_BATMAN, "updating last_seqno: old %d, new %d \n", orig_node->last_real_seqno, batman_packet->seqno);
+ bat_dbg(DBG_BATMAN, "updating last_seqno: old %d, new %d \n",
+ orig_node->last_real_seqno, batman_packet->seqno);
orig_node->last_real_seqno = batman_packet->seqno;
}
return is_duplicate;
}
-void receive_bat_packet(struct ethhdr *ethhdr, struct batman_packet *batman_packet, unsigned char *hna_buff, int hna_buff_len, struct batman_if *if_incoming)
+void receive_bat_packet(struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ unsigned char *hna_buff, int hna_buff_len,
+ struct batman_if *if_incoming)
{
struct batman_if *batman_if;
struct orig_node *orig_neigh_node, *orig_node;
- char orig_str[ETH_STR_LEN], prev_sender_str[ETH_STR_LEN], neigh_str[ETH_STR_LEN];
char has_directlink_flag;
- char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0, is_broadcast = 0, is_bidirectional, is_single_hop_neigh, is_duplicate;
+ char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
+ char is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
+ char is_duplicate;
unsigned short if_incoming_seqno;
- /* Silently drop when the batman packet is actually not a correct packet.
+ /* Silently drop when the batman packet is actually not a
+ * correct packet.
*
* This might happen if a packet is padded (e.g. Ethernet has a
* minimum frame length of 64 byte) and the aggregation interprets
* it as an additional length.
*
- * TODO: A more sane solution would be to have a bit in the batman_packet
- * to detect whether the packet is the last packet in an aggregation.
- * Here we expect that the padding is always zero (or not 0x01)
+ * TODO: A more sane solution would be to have a bit in the
+ * batman_packet to detect whether the packet is the last
+ * packet in an aggregation. Here we expect that the padding
+ * is always zero (or not 0x01)
*/
if (batman_packet->packet_type != BAT_PACKET)
return;
/* could be changed by schedule_own_packet() */
if_incoming_seqno = atomic_read(&if_incoming->seqno);
- addr_to_string(orig_str, batman_packet->orig);
- addr_to_string(prev_sender_str, batman_packet->prev_sender);
- addr_to_string(neigh_str, ethhdr->h_source);
-
has_directlink_flag = (batman_packet->flags & DIRECTLINK ? 1 : 0);
- is_single_hop_neigh = (compare_orig(ethhdr->h_source, batman_packet->orig) ? 1 : 0);
+ is_single_hop_neigh = (compare_orig(ethhdr->h_source,
+ batman_packet->orig) ? 1 : 0);
- debug_log(LOG_TYPE_BATMAN, "Received BATMAN packet via NB: %s, IF: %s [%s] (from OG: %s, via prev OG: %s, seqno %d, tq %d, TTL %d, V %d, IDF %d) \n", neigh_str, if_incoming->dev, if_incoming->addr_str, orig_str, prev_sender_str, batman_packet->seqno, batman_packet->tq, batman_packet->ttl, batman_packet->version, has_directlink_flag);
+ bat_dbg(DBG_BATMAN, "Received BATMAN packet via NB: %pM, IF: %s [%s] (from OG: %pM, via prev OG: %pM, seqno %d, tq %d, TTL %d, V %d, IDF %d) \n",
+ ethhdr->h_source, if_incoming->dev, if_incoming->addr_str,
+ batman_packet->orig, batman_packet->prev_sender,
+ batman_packet->seqno, batman_packet->tq, batman_packet->ttl,
+ batman_packet->version, has_directlink_flag);
list_for_each_entry_rcu(batman_if, &if_list, list) {
if (batman_if->if_active != IF_ACTIVE)
continue;
- if (compare_orig(ethhdr->h_source, batman_if->net_dev->dev_addr))
+ if (compare_orig(ethhdr->h_source,
+ batman_if->net_dev->dev_addr))
is_my_addr = 1;
- if (compare_orig(batman_packet->orig, batman_if->net_dev->dev_addr))
+ if (compare_orig(batman_packet->orig,
+ batman_if->net_dev->dev_addr))
is_my_orig = 1;
- if (compare_orig(batman_packet->prev_sender, batman_if->net_dev->dev_addr))
+ if (compare_orig(batman_packet->prev_sender,
+ batman_if->net_dev->dev_addr))
is_my_oldorig = 1;
if (compare_orig(ethhdr->h_source, broadcastAddr))
}
if (batman_packet->version != COMPAT_VERSION) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: incompatible batman version (%i) \n", batman_packet->version);
+ bat_dbg(DBG_BATMAN,
+ "Drop packet: incompatible batman version (%i)\n",
+ batman_packet->version);
return;
}
if (is_my_addr) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: received my own broadcast (sender: %s) \n", neigh_str);
+ bat_dbg(DBG_BATMAN,
+ "Drop packet: received my own broadcast (sender: %pM)\n",
+ ethhdr->h_source);
return;
}
if (is_broadcast) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: ignoring all packets with broadcast source addr (sender: %s) \n", neigh_str);
+ bat_dbg(DBG_BATMAN, "Drop packet: ignoring all packets with broadcast source addr (sender: %pM) \n", ethhdr->h_source);
return;
}
if (is_my_orig) {
+ TYPE_OF_WORD *word;
+ int offset;
+
orig_neigh_node = get_orig_node(ethhdr->h_source);
- /* neighbour has to indicate direct link and it has to come via the corresponding interface */
- /* if received seqno equals last send seqno save new seqno for bidirectional check */
- if (has_directlink_flag && compare_orig(if_incoming->net_dev->dev_addr, batman_packet->orig) &&
- (batman_packet->seqno - if_incoming_seqno + 2 == 0)) {
- bit_mark((TYPE_OF_WORD *)&(orig_neigh_node->bcast_own[if_incoming->if_num * NUM_WORDS]), 0);
- orig_neigh_node->bcast_own_sum[if_incoming->if_num] = bit_packet_count((TYPE_OF_WORD *)&(orig_neigh_node->bcast_own[if_incoming->if_num * NUM_WORDS]));
+ if (!orig_neigh_node)
+ return;
+
+ /* neighbor has to indicate direct link and it has to
+ * come via the corresponding interface */
+ /* if received seqno equals last send seqno save new
+ * seqno for bidirectional check */
+ if (has_directlink_flag &&
+ compare_orig(if_incoming->net_dev->dev_addr,
+ batman_packet->orig) &&
+ (batman_packet->seqno - if_incoming_seqno + 2 == 0)) {
+ offset = if_incoming->if_num * NUM_WORDS;
+ word = &(orig_neigh_node->bcast_own[offset]);
+ bit_mark(word, 0);
+ orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
+ bit_packet_count(word);
}
- debug_log(LOG_TYPE_BATMAN, "Drop packet: originator packet from myself (via neighbour) \n");
+ bat_dbg(DBG_BATMAN, "Drop packet: originator packet from myself (via neighbor) \n");
return;
}
if (batman_packet->tq == 0) {
count_real_packets(ethhdr, batman_packet, if_incoming);
- debug_log(LOG_TYPE_BATMAN, "Drop packet: originator packet with tq equal 0 \n");
+ bat_dbg(DBG_BATMAN, "Drop packet: originator packet with tq equal 0 \n");
return;
}
if (is_my_oldorig) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: ignoring all rebroadcast echos (sender: %s) \n", neigh_str);
+ bat_dbg(DBG_BATMAN, "Drop packet: ignoring all rebroadcast echos (sender: %pM) \n", ethhdr->h_source);
return;
}
return;
/* avoid temporary routing loops */
- if ((orig_node->router) && (orig_node->router->orig_node->router) &&
- (compare_orig(orig_node->router->addr, batman_packet->prev_sender)) &&
+ if ((orig_node->router) &&
+ (orig_node->router->orig_node->router) &&
+ (compare_orig(orig_node->router->addr,
+ batman_packet->prev_sender)) &&
!(compare_orig(batman_packet->orig, batman_packet->prev_sender)) &&
- (compare_orig(orig_node->router->addr, orig_node->router->orig_node->router->addr))) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %s) \n", neigh_str);
+ (compare_orig(orig_node->router->addr,
+ orig_node->router->orig_node->router->addr))) {
+ bat_dbg(DBG_BATMAN, "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM) \n", ethhdr->h_source);
return;
}
- /* if sender is a direct neighbor the sender mac equals originator mac */
- orig_neigh_node = (is_single_hop_neigh ? orig_node : get_orig_node(ethhdr->h_source));
+ /* if sender is a direct neighbor the sender mac equals
+ * originator mac */
+ orig_neigh_node = (is_single_hop_neigh ?
+ orig_node : get_orig_node(ethhdr->h_source));
if (orig_neigh_node == NULL)
return;
- /* drop packet if sender is not a direct neighbor and if we don't route towards it */
- if (!is_single_hop_neigh && (orig_neigh_node->router == NULL)) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: OGM via unknown neighbor! \n");
+ /* drop packet if sender is not a direct neighbor and if we
+ * don't route towards it */
+ if (!is_single_hop_neigh &&
+ (orig_neigh_node->router == NULL)) {
+ bat_dbg(DBG_BATMAN, "Drop packet: OGM via unknown neighbor!\n");
return;
}
- is_bidirectional = isBidirectionalNeigh(orig_node, orig_neigh_node, batman_packet, if_incoming);
+ is_bidirectional = isBidirectionalNeigh(orig_node, orig_neigh_node,
+ batman_packet, if_incoming);
- /* update ranking if it is not a duplicate or has the same seqno and similar ttl as the non-duplicate */
- if (is_bidirectional && (!is_duplicate ||
- ((orig_node->last_real_seqno == batman_packet->seqno) &&
- (orig_node->last_ttl - 3 <= batman_packet->ttl))))
- update_orig(orig_node, ethhdr, batman_packet, if_incoming, hna_buff, hna_buff_len, is_duplicate);
+ /* update ranking if it is not a duplicate or has the same
+ * seqno and similar ttl as the non-duplicate */
+ if (is_bidirectional &&
+ (!is_duplicate ||
+ ((orig_node->last_real_seqno == batman_packet->seqno) &&
+ (orig_node->last_ttl - 3 <= batman_packet->ttl))))
+ update_orig(orig_node, ethhdr, batman_packet,
+ if_incoming, hna_buff, hna_buff_len, is_duplicate);
- /* is single hop (direct) neighbour */
+ /* is single hop (direct) neighbor */
if (is_single_hop_neigh) {
/* mark direct link on incoming interface */
- schedule_forward_packet(orig_node, ethhdr, batman_packet, 1, hna_buff_len, if_incoming);
+ schedule_forward_packet(orig_node, ethhdr, batman_packet,
+ 1, hna_buff_len, if_incoming);
- debug_log(LOG_TYPE_BATMAN, "Forwarding packet: rebroadcast neighbour packet with direct link flag \n");
+ bat_dbg(DBG_BATMAN, "Forwarding packet: rebroadcast neighbor packet with direct link flag\n");
return;
}
/* multihop originator */
if (!is_bidirectional) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: not received via bidirectional link\n");
+ bat_dbg(DBG_BATMAN,
+ "Drop packet: not received via bidirectional link\n");
return;
}
if (is_duplicate) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: duplicate packet received\n");
+ bat_dbg(DBG_BATMAN, "Drop packet: duplicate packet received\n");
return;
}
- debug_log(LOG_TYPE_BATMAN, "Forwarding packet: rebroadcast originator packet \n");
- schedule_forward_packet(orig_node, ethhdr, batman_packet, 0, hna_buff_len, if_incoming);
+ bat_dbg(DBG_BATMAN,
+ "Forwarding packet: rebroadcast originator packet\n");
+ schedule_forward_packet(orig_node, ethhdr, batman_packet,
+ 0, hna_buff_len, if_incoming);
}
-void purge_orig(struct work_struct *work)
+int recv_bat_packet(struct sk_buff *skb,
+ struct batman_if *batman_if)
{
- struct list_head *list_pos, *list_pos_tmp;
- struct hash_it_t *hashit = NULL;
- struct orig_node *orig_node;
- struct neigh_node *neigh_node, *best_neigh_node;
- char orig_str[ETH_STR_LEN], neigh_str[ETH_STR_LEN], neigh_purged;
-
- spin_lock(&orig_hash_lock);
-
- /* for all origins... */
- while (NULL != (hashit = hash_iterate(orig_hash, hashit))) {
-
- orig_node = hashit->bucket->data;
- addr_to_string(orig_str, orig_node->orig);
-
- if (time_after(jiffies, orig_node->last_valid + ((2 * PURGE_TIMEOUT * HZ) / 1000))) {
-
- debug_log(LOG_TYPE_BATMAN, "Originator timeout: originator %s, last_valid %u \n", orig_str, (orig_node->last_valid / HZ));
-
- hash_remove_bucket(orig_hash, hashit);
- free_orig_node(orig_node);
-
- } else {
-
- best_neigh_node = NULL;
- neigh_purged = 0;
-
- /* for all neighbours towards this originator ... */
- list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
- neigh_node = list_entry(list_pos, struct neigh_node, list);
-
- if (time_after(jiffies, neigh_node->last_valid + ((PURGE_TIMEOUT * HZ) / 1000))) {
-
- addr_to_string(neigh_str, neigh_node->addr);
- debug_log(LOG_TYPE_BATMAN, "Neighbour timeout: originator %s, neighbour: %s, last_valid %u \n", orig_str, neigh_str, (neigh_node->last_valid / HZ));
-
- neigh_purged = 1;
- list_del(list_pos);
- kfree(neigh_node);
-
- } else {
-
- if ((best_neigh_node == NULL) || (neigh_node->tq_avg > best_neigh_node->tq_avg))
- best_neigh_node = neigh_node;
-
- }
-
- }
+ struct ethhdr *ethhdr;
+ unsigned long flags;
+
+ /* drop packet if it has not necessary minimum size */
+ if (skb_headlen(skb) < sizeof(struct batman_packet))
+ return NET_RX_DROP;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with broadcast indication but unicast recipient */
+ if (!is_bcast(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return NET_RX_DROP;
+
+ spin_lock_irqsave(&orig_hash_lock, flags);
+ /* TODO: we use headlen instead of "length", because
+ * only this data is paged in. */
+ /* TODO: is another skb_copy needed here? there will be
+ * written on the data, but nobody (?) should further use
+ * this data */
+ receive_aggr_bat_packet(ethhdr,
+ skb->data,
+ skb_headlen(skb),
+ batman_if);
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
+
+ kfree_skb(skb);
+ return NET_RX_SUCCESS;
+}
- if (neigh_purged)
- update_routes(orig_node, best_neigh_node, orig_node->hna_buff, orig_node->hna_buff_len);
+static int recv_my_icmp_packet(struct sk_buff *skb)
+{
+ struct orig_node *orig_node;
+ struct icmp_packet *icmp_packet;
+ struct ethhdr *ethhdr;
+ struct sk_buff *skb_old;
+ struct batman_if *batman_if;
+ int ret;
+ unsigned long flags;
+ uint8_t dstaddr[ETH_ALEN];
- }
+ icmp_packet = (struct icmp_packet *) skb->data;
+ ethhdr = (struct ethhdr *) skb_mac_header(skb);
+ /* add data to device queue */
+ if (icmp_packet->msg_type != ECHO_REQUEST) {
+ bat_device_receive_packet(icmp_packet);
+ return NET_RX_DROP;
}
- spin_unlock(&orig_hash_lock);
+ /* answer echo request (ping) */
+ /* get routing information */
+ spin_lock_irqsave(&orig_hash_lock, flags);
+ orig_node = ((struct orig_node *)hash_find(orig_hash,
+ icmp_packet->orig));
+ ret = NET_RX_DROP;
+
+ if ((orig_node != NULL) &&
+ (orig_node->batman_if != NULL) &&
+ (orig_node->router != NULL)) {
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->batman_if;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ skb_old = NULL;
+ if (!skb_clone_writable(skb, sizeof(struct icmp_packet))) {
+ skb_old = skb;
+ skb = skb_copy(skb, GFP_ATOMIC);
+ if (!skb)
+ return NET_RX_DROP;
+ icmp_packet = (struct icmp_packet *) skb->data;
+ kfree_skb(skb_old);
+ }
- start_purge_timer();
-}
+ memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+ memcpy(icmp_packet->orig, ethhdr->h_dest, ETH_ALEN);
+ icmp_packet->msg_type = ECHO_REPLY;
+ icmp_packet->ttl = TTL;
-static int receive_raw_packet(struct socket *raw_sock, unsigned char *packet_buff, int packet_buff_len)
-{
- struct kvec iov;
- struct msghdr msg;
+ send_skb_packet(skb, batman_if, dstaddr);
+ ret = NET_RX_SUCCESS;
- iov.iov_base = packet_buff;
- iov.iov_len = packet_buff_len;
+ } else
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
- msg.msg_flags = MSG_DONTWAIT; /* non-blocking */
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
- msg.msg_control = NULL;
-
- return kernel_recvmsg(raw_sock, &msg, &iov, 1, packet_buff_len, MSG_DONTWAIT);
+ return ret;
}
-int packet_recv_thread(void *data)
+static int recv_icmp_ttl_exceeded(struct sk_buff *skb)
{
- struct batman_if *batman_if;
- struct ethhdr *ethhdr;
- struct batman_packet *batman_packet;
- struct unicast_packet *unicast_packet;
- struct bcast_packet *bcast_packet;
- struct icmp_packet *icmp_packet;
- struct vis_packet *vis_packet;
struct orig_node *orig_node;
- unsigned char *packet_buff, src_str[ETH_STR_LEN], dst_str[ETH_STR_LEN];
- int vis_info_len;
- int result;
-
- atomic_set(&data_ready_cond, 0);
- atomic_set(&exit_cond, 0);
- packet_buff = kmalloc(PACKBUFF_SIZE, GFP_KERNEL);
- if (!packet_buff) {
- debug_log(LOG_TYPE_CRIT, "Could allocate memory for the packet buffer. :(\n");
- return -1;
+ struct icmp_packet *icmp_packet;
+ struct ethhdr *ethhdr;
+ struct sk_buff *skb_old;
+ struct batman_if *batman_if;
+ int ret;
+ unsigned long flags;
+ uint8_t dstaddr[ETH_ALEN];
+
+ icmp_packet = (struct icmp_packet *)skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* send TTL exceeded if packet is an echo request (traceroute) */
+ if (icmp_packet->msg_type != ECHO_REQUEST) {
+ printk(KERN_WARNING "batman-adv:Warning - can't forward icmp packet from %pM to %pM: ttl exceeded\n",
+ icmp_packet->orig, icmp_packet->dst);
+ return NET_RX_DROP;
}
- while ((!kthread_should_stop()) && (!atomic_read(&exit_cond))) {
-
- wait_event_interruptible(thread_wait, (atomic_read(&data_ready_cond) || atomic_read(&exit_cond)));
-
- atomic_set(&data_ready_cond, 0);
-
- if (kthread_should_stop() || atomic_read(&exit_cond))
- break;
-
- /* we only want to safely traverse the list, hard-interfaces
- * won't be deleted anyway as long as this thread runs. */
-
- rcu_read_lock();
- list_for_each_entry_rcu(batman_if, &if_list, list) {
- rcu_read_unlock();
-
- result = -1;
-
- while (1) {
- if (batman_if->if_active != IF_ACTIVE) {
- if (batman_if->if_active != IF_TO_BE_ACTIVATED)
- debug_log(LOG_TYPE_NOTICE,
- "Could not read from deactivated interface %s!\n",
- batman_if->dev);
-
- if (batman_if->raw_sock)
- receive_raw_packet(batman_if->raw_sock, packet_buff, PACKBUFF_SIZE);
- result = 0;
- break;
- }
-
- result = receive_raw_packet(batman_if->raw_sock, packet_buff, PACKBUFF_SIZE);
- if (result <= 0)
- break;
-
- if (result < sizeof(struct ethhdr) + 2)
- continue;
-
- ethhdr = (struct ethhdr *)packet_buff;
- batman_packet = (struct batman_packet *)(packet_buff + sizeof(struct ethhdr));
-
- if (batman_packet->version != COMPAT_VERSION) {
- debug_log(LOG_TYPE_BATMAN, "Drop packet: incompatible batman version (%i) \n", batman_packet->version);
- continue;
- }
-
- switch (batman_packet->packet_type) {
- /* batman originator packet */
- case BAT_PACKET:
- /* packet with broadcast indication but unicast recipient */
- if (!is_bcast(ethhdr->h_dest))
- continue;
-
- /* packet with broadcast sender address */
- if (is_bcast(ethhdr->h_source))
- continue;
-
- /* drop packet if it has not at least one batman packet as payload */
- if (result < sizeof(struct ethhdr) + sizeof(struct batman_packet))
- continue;
-
- spin_lock(&orig_hash_lock);
- receive_aggr_bat_packet(ethhdr,
- packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- batman_if);
- spin_unlock(&orig_hash_lock);
-
- break;
-
- /* batman icmp packet */
- case BAT_ICMP:
- /* packet with unicast indication but broadcast recipient */
- if (is_bcast(ethhdr->h_dest))
- continue;
-
- /* packet with broadcast sender address */
- if (is_bcast(ethhdr->h_source))
- continue;
-
- /* not for me */
- if (!is_my_mac(ethhdr->h_dest))
- continue;
-
- /* drop packet if it has not necessary minimum size */
- if (result < sizeof(struct ethhdr) + sizeof(struct icmp_packet))
- continue;
-
- icmp_packet = (struct icmp_packet *)(packet_buff + sizeof(struct ethhdr));
-
- /* packet for me */
- if (is_my_mac(icmp_packet->dst)) {
-
- /* add data to device queue */
- if (icmp_packet->msg_type != ECHO_REQUEST) {
- bat_device_receive_packet(icmp_packet);
- continue;
- }
-
- /* answer echo request (ping) */
- /* get routing information */
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, icmp_packet->orig));
-
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
-
- memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
- memcpy(icmp_packet->orig, ethhdr->h_dest, ETH_ALEN);
- icmp_packet->msg_type = ECHO_REPLY;
- icmp_packet->ttl = TTL;
-
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
-
- }
-
- spin_unlock(&orig_hash_lock);
- continue;
-
- }
-
- /* TTL exceeded */
- if (icmp_packet->ttl < 2) {
-
- addr_to_string(src_str, icmp_packet->orig);
- addr_to_string(dst_str, icmp_packet->dst);
-
- debug_log(LOG_TYPE_NOTICE, "Error - can't send packet from %s to %s: ttl exceeded\n", src_str, dst_str);
-
- /* send TTL exceeded if packet is an echo request (traceroute) */
- if (icmp_packet->msg_type != ECHO_REQUEST)
- continue;
-
- /* get routing information */
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, icmp_packet->orig));
-
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
-
- memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
- memcpy(icmp_packet->orig, ethhdr->h_dest, ETH_ALEN);
- icmp_packet->msg_type = TTL_EXCEEDED;
- icmp_packet->ttl = TTL;
-
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
+ /* get routing information */
+ spin_lock_irqsave(&orig_hash_lock, flags);
+ orig_node = ((struct orig_node *)
+ hash_find(orig_hash, icmp_packet->orig));
+ ret = NET_RX_DROP;
+
+ if ((orig_node != NULL) &&
+ (orig_node->batman_if != NULL) &&
+ (orig_node->router != NULL)) {
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->batman_if;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (!skb_clone_writable(skb, sizeof(struct icmp_packet))) {
+ skb_old = skb;
+ skb = skb_copy(skb, GFP_ATOMIC);
+ if (!skb)
+ return NET_RX_DROP;
+ icmp_packet = (struct icmp_packet *) skb->data;
+ kfree_skb(skb_old);
+ }
- }
+ memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+ memcpy(icmp_packet->orig, ethhdr->h_dest, ETH_ALEN);
+ icmp_packet->msg_type = TTL_EXCEEDED;
+ icmp_packet->ttl = TTL;
- spin_unlock(&orig_hash_lock);
- continue;
+ send_skb_packet(skb, batman_if, dstaddr);
+ ret = NET_RX_SUCCESS;
- }
+ } else
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
- /* get routing information */
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, icmp_packet->dst));
+ return ret;
+}
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
- /* decrement ttl */
- icmp_packet->ttl--;
+int recv_icmp_packet(struct sk_buff *skb)
+{
+ struct icmp_packet *icmp_packet;
+ struct ethhdr *ethhdr;
+ struct orig_node *orig_node;
+ struct sk_buff *skb_old;
+ struct batman_if *batman_if;
+ int hdr_size = sizeof(struct icmp_packet);
+ int ret;
+ unsigned long flags;
+ uint8_t dstaddr[ETH_ALEN];
+
+ /* drop packet if it has not necessary minimum size */
+ if (skb_headlen(skb) < hdr_size)
+ return NET_RX_DROP;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with unicast indication but broadcast recipient */
+ if (is_bcast(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return NET_RX_DROP;
+
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ icmp_packet = (struct icmp_packet *) skb->data;
+
+ /* packet for me */
+ if (is_my_mac(icmp_packet->dst))
+ return recv_my_icmp_packet(skb);
+
+ /* TTL exceeded */
+ if (icmp_packet->ttl < 2)
+ return recv_icmp_ttl_exceeded(skb);
+
+ ret = NET_RX_DROP;
+
+ /* get routing information */
+ spin_lock_irqsave(&orig_hash_lock, flags);
+ orig_node = ((struct orig_node *)
+ hash_find(orig_hash, icmp_packet->dst));
+
+ if ((orig_node != NULL) &&
+ (orig_node->batman_if != NULL) &&
+ (orig_node->router != NULL)) {
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->batman_if;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (!skb_clone_writable(skb, sizeof(struct icmp_packet))) {
+ skb_old = skb;
+ skb = skb_copy(skb, GFP_ATOMIC);
+ if (!skb)
+ return NET_RX_DROP;
+ icmp_packet = (struct icmp_packet *) skb->data;
+ kfree_skb(skb_old);
+ }
- /* route it */
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
- }
+ /* decrement ttl */
+ icmp_packet->ttl--;
- spin_unlock(&orig_hash_lock);
- break;
+ /* route it */
+ send_skb_packet(skb, batman_if, dstaddr);
+ ret = NET_RX_SUCCESS;
- /* unicast packet */
- case BAT_UNICAST:
- /* packet with unicast indication but broadcast recipient */
- if (is_bcast(ethhdr->h_dest))
- continue;
+ } else
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
- /* packet with broadcast sender address */
- if (is_bcast(ethhdr->h_source))
- continue;
+ return ret;
+}
- /* not for me */
- if (!is_my_mac(ethhdr->h_dest))
- continue;
+int recv_unicast_packet(struct sk_buff *skb)
+{
+ struct unicast_packet *unicast_packet;
+ struct orig_node *orig_node;
+ struct ethhdr *ethhdr;
+ struct batman_if *batman_if;
+ struct sk_buff *skb_old;
+ uint8_t dstaddr[ETH_ALEN];
+ int hdr_size = sizeof(struct unicast_packet);
+ int ret;
+ unsigned long flags;
- /* drop packet if it has not necessary minimum size */
- if (result < sizeof(struct ethhdr) + sizeof(struct unicast_packet))
- continue;
+ /* drop packet if it has not necessary minimum size */
+ if (skb_headlen(skb) < hdr_size)
+ return NET_RX_DROP;
- unicast_packet = (struct unicast_packet *)(packet_buff + sizeof(struct ethhdr));
+ ethhdr = (struct ethhdr *) skb_mac_header(skb);
- /* packet for me */
- if (is_my_mac(unicast_packet->dest)) {
+ /* packet with unicast indication but broadcast recipient */
+ if (is_bcast(ethhdr->h_dest))
+ return NET_RX_DROP;
- interface_rx(soft_device, packet_buff + sizeof(struct ethhdr) + sizeof(struct unicast_packet), result - sizeof(struct ethhdr) - sizeof(struct unicast_packet));
- continue;
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return NET_RX_DROP;
- }
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return NET_RX_DROP;
- /* TTL exceeded */
- if (unicast_packet->ttl < 2) {
- addr_to_string(src_str, ((struct ethhdr *)(unicast_packet + 1))->h_source);
- addr_to_string(dst_str, unicast_packet->dest);
+ unicast_packet = (struct unicast_packet *) skb->data;
- debug_log(LOG_TYPE_NOTICE, "Error - can't send packet from %s to %s: ttl exceeded\n", src_str, dst_str);
- continue;
- }
+ /* packet for me */
+ if (is_my_mac(unicast_packet->dest)) {
+ interface_rx(skb, hdr_size);
+ return NET_RX_SUCCESS;
+ }
- /* get routing information */
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, unicast_packet->dest));
+ /* TTL exceeded */
+ if (unicast_packet->ttl < 2) {
+ printk(KERN_WARNING "batman-adv:Warning - can't forward unicast packet from %pM to %pM: ttl exceeded\n",
+ ethhdr->h_source, unicast_packet->dest);
+ return NET_RX_DROP;
+ }
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
- /* decrement ttl */
- unicast_packet->ttl--;
+ ret = NET_RX_DROP;
+ /* get routing information */
+ spin_lock_irqsave(&orig_hash_lock, flags);
+ orig_node = ((struct orig_node *)
+ hash_find(orig_hash, unicast_packet->dest));
+
+ if ((orig_node != NULL) &&
+ (orig_node->batman_if != NULL) &&
+ (orig_node->router != NULL)) {
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->batman_if;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (!skb_clone_writable(skb, sizeof(struct unicast_packet))) {
+ skb_old = skb;
+ skb = skb_copy(skb, GFP_ATOMIC);
+ if (!skb)
+ return NET_RX_DROP;
+ unicast_packet = (struct unicast_packet *) skb->data;
+ kfree_skb(skb_old);
+ }
+ /* decrement ttl */
+ unicast_packet->ttl--;
- /* route it */
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
- }
+ /* route it */
+ send_skb_packet(skb, batman_if, dstaddr);
+ ret = NET_RX_SUCCESS;
- spin_unlock(&orig_hash_lock);
- break;
+ } else
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
- /* broadcast packet */
- case BAT_BCAST:
- /* packet with broadcast indication but unicast recipient */
- if (!is_bcast(ethhdr->h_dest))
- continue;
+ return ret;
+}
- /* packet with broadcast sender address */
- if (is_bcast(ethhdr->h_source))
- continue;
- /* drop packet if it has not necessary minimum size */
- if (result < sizeof(struct ethhdr) + sizeof(struct bcast_packet))
- continue;
+int recv_bcast_packet(struct sk_buff *skb)
+{
+ struct orig_node *orig_node;
+ struct bcast_packet *bcast_packet;
+ struct ethhdr *ethhdr;
+ int hdr_size = sizeof(struct bcast_packet);
+ unsigned long flags;
- /* ignore broadcasts sent by myself */
- if (is_my_mac(ethhdr->h_source))
- continue;
+ /* drop packet if it has not necessary minimum size */
+ if (skb_headlen(skb) < hdr_size)
+ return NET_RX_DROP;
- bcast_packet = (struct bcast_packet *)(packet_buff + sizeof(struct ethhdr));
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
- /* ignore broadcasts originated by myself */
- if (is_my_mac(bcast_packet->orig))
- continue;
+ /* packet with broadcast indication but unicast recipient */
+ if (!is_bcast(ethhdr->h_dest))
+ return NET_RX_DROP;
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, bcast_packet->orig));
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return NET_RX_DROP;
- if (orig_node == NULL) {
- spin_unlock(&orig_hash_lock);
- continue;
- }
+ /* ignore broadcasts sent by myself */
+ if (is_my_mac(ethhdr->h_source))
+ return NET_RX_DROP;
- /* check flood history */
- if (get_bit_status(orig_node->bcast_bits, orig_node->last_bcast_seqno, ntohs(bcast_packet->seqno))) {
- spin_unlock(&orig_hash_lock);
- continue;
- }
+ bcast_packet = (struct bcast_packet *) skb->data;
- /* mark broadcast in flood history */
- if (bit_get_packet(orig_node->bcast_bits, ntohs(bcast_packet->seqno) - orig_node->last_bcast_seqno, 1))
- orig_node->last_bcast_seqno = ntohs(bcast_packet->seqno);
+ /* ignore broadcasts originated by myself */
+ if (is_my_mac(bcast_packet->orig))
+ return NET_RX_DROP;
- spin_unlock(&orig_hash_lock);
+ spin_lock_irqsave(&orig_hash_lock, flags);
+ orig_node = ((struct orig_node *)
+ hash_find(orig_hash, bcast_packet->orig));
- /* broadcast for me */
- interface_rx(soft_device, packet_buff + sizeof(struct ethhdr) + sizeof(struct bcast_packet), result - sizeof(struct ethhdr) - sizeof(struct bcast_packet));
+ if (orig_node == NULL) {
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
+ return NET_RX_DROP;
+ }
- /* rebroadcast packet */
- add_bcast_packet_to_list(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr));
+ /* check flood history */
+ if (get_bit_status(orig_node->bcast_bits,
+ orig_node->last_bcast_seqno,
+ ntohs(bcast_packet->seqno))) {
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
+ return NET_RX_DROP;
+ }
- break;
+ /* mark broadcast in flood history */
+ if (bit_get_packet(orig_node->bcast_bits,
+ ntohs(bcast_packet->seqno) -
+ orig_node->last_bcast_seqno, 1))
+ orig_node->last_bcast_seqno = ntohs(bcast_packet->seqno);
- /* vis packet */
- case BAT_VIS:
- /* drop if too short. */
- if (result < sizeof(struct ethhdr) + sizeof(struct vis_packet))
- continue;
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
- /* not for me */
- if (!is_my_mac(ethhdr->h_dest))
- continue;
+ /* rebroadcast packet */
+ add_bcast_packet_to_list(skb);
- vis_packet = (struct vis_packet *)(packet_buff + sizeof(struct ethhdr));
- vis_info_len = result - sizeof(struct ethhdr) - sizeof(struct vis_packet);
+ /* broadcast for me */
+ interface_rx(skb, hdr_size);
- /* ignore own packets */
- if (is_my_mac(vis_packet->vis_orig))
- continue;
+ return NET_RX_SUCCESS;
+}
- if (is_my_mac(vis_packet->sender_orig))
- continue;
+int recv_vis_packet(struct sk_buff *skb)
+{
+ struct vis_packet *vis_packet;
+ struct ethhdr *ethhdr;
+ int hdr_size = sizeof(struct vis_packet);
- switch (vis_packet->vis_type) {
- case VIS_TYPE_SERVER_SYNC:
- receive_server_sync_packet(vis_packet, vis_info_len);
- break;
+ if (skb_headlen(skb) < hdr_size)
+ return NET_RX_DROP;
- case VIS_TYPE_CLIENT_UPDATE:
- receive_client_update_packet(vis_packet, vis_info_len);
- break;
+ vis_packet = (struct vis_packet *) skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
- default: /* ignore unknown packet */
- break;
- }
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return NET_RX_DROP;
- break;
- }
+ /* ignore own packets */
+ if (is_my_mac(vis_packet->vis_orig))
+ return NET_RX_DROP;
- }
+ if (is_my_mac(vis_packet->sender_orig))
+ return NET_RX_DROP;
- if ((result < 0) && (result != -EAGAIN))
- debug_log(LOG_TYPE_CRIT, "Could not receive packet from interface %s: %i\n", batman_if->dev, result);
+ switch (vis_packet->vis_type) {
+ case VIS_TYPE_SERVER_SYNC:
+ /* TODO: handle fragmented skbs properly */
+ receive_server_sync_packet(vis_packet, skb_headlen(skb));
+ break;
- /* lock for the next iteration */
- rcu_read_lock();
- }
- rcu_read_unlock();
+ case VIS_TYPE_CLIENT_UPDATE:
+ /* TODO: handle fragmented skbs properly */
+ receive_client_update_packet(vis_packet, skb_headlen(skb));
+ break;
+ default: /* ignore unknown packet */
+ break;
}
- kfree(packet_buff);
-
- /* do not exit until kthread_stop() is actually called, otherwise it will wait for us
- * forever. */
- while (!kthread_should_stop())
- schedule();
-
- return 0;
-}
-
-void batman_data_ready(struct sock *sk, int len)
-{
- void (*data_ready)(struct sock *, int) = sk->sk_user_data;
-
- data_ready(sk, len);
- atomic_set(&data_ready_cond, 1);
- wake_up_interruptible(&thread_wait);
+ /* We take a copy of the data in the packet, so we should
+ always free the skbuf. */
+ return NET_RX_DROP;
}
-
git.openpandora.org / pandora-kernel.git / blobdiff