The following commit has been merged in the linux branch:
commit 4efe0b06559e8cb39c3d6a9bd01cc99604dfd247
Author: Andrew Lunn <andrew(a)lunn.ch>
Date: Sat Dec 12 23:39:42 2009 +0100
Staging: batman-adv: Refactor routing.c
Break up a lot of the big functions up into many smaller ones. This
helps with readability and there is now a lot less code squashed
against the right hand margin.
Signed-off-by: Andrew Lunn <andrew(a)lunn.ch>
Acked-by: Marek Lindner <lindner_marek(a)yahoo.de>
Acked-by: Simon Wunderlich <simon.wunderlich(a)s2003.tu-chemnitz.de>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>
diff --git a/drivers/staging/batman-adv/routing.c b/drivers/staging/batman-adv/routing.c
index 1f42d41..1ff2a7a 100644
--- a/drivers/staging/batman-adv/routing.c
+++ b/drivers/staging/batman-adv/routing.c
@@ -19,10 +19,6 @@
*
*/
-
-
-
-
#include "main.h"
#include "routing.h"
#include "send.h"
@@ -37,8 +33,6 @@
#include "aggregation.h"
#include "compat.h"
-
-
DECLARE_WAIT_QUEUE_HEAD(thread_wait);
static DECLARE_DELAYED_WORK(purge_orig_wq, purge_orig);
@@ -83,7 +77,9 @@ void originator_free(void)
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)
+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)
{
struct neigh_node *neigh_node;
@@ -122,12 +118,14 @@ void free_orig_node(void *data)
kfree(orig_node);
}
-/* this function finds or creates an originator entry for the given address if it does not exits */
+/* 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)
{
struct orig_node *orig_node;
struct hashtable_t *swaphash;
char orig_str[ETH_STR_LEN];
+ int size;
orig_node = ((struct orig_node *)hash_find(orig_hash, addr));
@@ -146,11 +144,14 @@ static struct orig_node *get_orig_node(uint8_t *addr)
orig_node->batman_if = NULL;
orig_node->hna_buff = 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);
+ size = num_ifs * sizeof(TYPE_OF_WORD) * NUM_WORDS;
+
+ orig_node->bcast_own = kmalloc(size, GFP_ATOMIC);
+ memset(orig_node->bcast_own, 0, size);
- 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));
+ size = num_ifs * sizeof(uint8_t);
+ orig_node->bcast_own_sum = kmalloc(size, GFP_ATOMIC);
+ memset(orig_node->bcast_own_sum, 0, size);
hash_add(orig_hash, orig_node);
@@ -158,7 +159,8 @@ static struct orig_node *get_orig_node(uint8_t *addr)
swaphash = hash_resize(orig_hash, orig_hash->size * 2);
if (swaphash == NULL)
- printk(KERN_ERR "batman-adv:Couldn't resize orig hash table \n");
+ printk(KERN_ERR
+ "batman-adv:Couldn't resize orig hash table \n");
else
orig_hash = swaphash;
}
@@ -170,75 +172,99 @@ void slide_own_bcast_window(struct batman_if *batman_if)
{
struct hash_it_t *hashit = NULL;
struct orig_node *orig_node;
+ TYPE_OF_WORD *word;
spin_lock(&orig_hash_lock);
while (NULL != (hashit = hash_iterate(orig_hash, hashit))) {
orig_node = hashit->bucket->data;
+ word = &(orig_node->bcast_own[batman_if->if_num * NUM_WORDS]);
- 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]));
+ bit_get_packet(word, 1, 0);
+ orig_node->bcast_own_sum[batman_if->if_num] =
+ bit_packet_count(word);
}
spin_unlock(&orig_hash_lock);
}
-static void update_routes(struct orig_node *orig_node, struct neigh_node *neigh_node, unsigned char *hna_buff, int hna_buff_len)
+static void update_HNA(struct orig_node *orig_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 ((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 == 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)) {
- bat_dbg(DBG_ROUTES, "Deleting route towards: %s\n",
- orig_str);
- hna_global_del_orig(orig_node, "originator timed out");
+ if (orig_node->hna_buff_len > 0)
+ hna_global_del_orig(orig_node,
+ "originator changed hna");
- /* route added */
- } else if ((orig_node->router == NULL) && (neigh_node != NULL)) {
-
- addr_to_string(neigh_str, neigh_node->addr);
- bat_dbg(DBG_ROUTES, "Adding route towards: %s (via %s)\n", orig_str, neigh_str);
+ if ((hna_buff_len > 0) && (hna_buff != NULL))
hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
+ }
+}
- /* route changed */
- } else {
+static void update_route(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];
+ char router_str[ETH_STR_LEN];
- addr_to_string(neigh_str, neigh_node->addr);
- addr_to_string(router_str, orig_node->router->addr);
- bat_dbg(DBG_ROUTES, "Changing route towards: %s (now via %s - was via %s)\n", orig_str, neigh_str, router_str);
+ addr_to_string(orig_str, orig_node->orig);
- }
+ /* route deleted */
+ if ((orig_node->router != NULL) && (neigh_node == NULL)) {
- if (neigh_node != NULL)
- orig_node->batman_if = neigh_node->if_incoming;
- else
- orig_node->batman_if = NULL;
+ bat_dbg(DBG_ROUTES, "Deleting route towards: %s\n",
+ orig_str);
+ hna_global_del_orig(orig_node, "originator timed out");
- orig_node->router = neigh_node;
+ /* route added */
+ } else if ((orig_node->router == NULL) && (neigh_node != NULL)) {
- /* may be just HNA changed */
+ addr_to_string(neigh_str, neigh_node->addr);
+ bat_dbg(DBG_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);
+ bat_dbg(DBG_ROUTES, "Changing route towards: %s (now via %s - was via %s)\n", orig_str, neigh_str, router_str);
+ }
- 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 (neigh_node != NULL)
+ orig_node->batman_if = neigh_node->if_incoming;
+ else
+ orig_node->batman_if = NULL;
- if (orig_node->hna_buff_len > 0)
- hna_global_del_orig(orig_node, "originator changed hna");
+ orig_node->router = neigh_node;
+}
- if ((hna_buff_len > 0) && (hna_buff != NULL))
- hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
- }
+static void update_routes(struct orig_node *orig_node,
+ struct neigh_node *neigh_node,
+ unsigned char *hna_buff, int hna_buff_len)
+{
- }
+ if (orig_node == NULL)
+ return;
+
+ if (orig_node->router != neigh_node)
+ update_route(orig_node, neigh_node, hna_buff, hna_buff_len);
+ /* may be just HNA changed */
+ 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];
@@ -248,66 +274,100 @@ static int isBidirectionalNeigh(struct orig_node *orig_node, struct orig_node *o
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);
+ neigh_node = create_neighbor(orig_node,
+ orig_neigh_node,
+ orig_neigh_node->orig,
+ if_incoming);
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);
+ neigh_node = create_neighbor(orig_neigh_node,
+ orig_neigh_node,
+ orig_neigh_node->orig,
+ if_incoming);
}
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));
+ 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 = %-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);
+ 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 */
+ /* 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;
@@ -315,7 +375,8 @@ static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr, stru
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;
}
@@ -323,19 +384,26 @@ static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr, stru
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);
+ neigh_node = create_neighbor(orig_node,
+ get_orig_node(ethhdr->h_source),
+ ethhdr->h_source, if_incoming);
else
- bat_dbg(DBG_BATMAN, "Updating existing last-hop neighbour of originator\n");
+ bat_dbg(DBG_BATMAN,
+ "Updating existing last-hop neighbour 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) {
@@ -343,9 +411,11 @@ static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr, stru
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;
@@ -354,11 +424,12 @@ static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr, stru
(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);
@@ -369,29 +440,35 @@ update_hna:
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) {
@@ -403,24 +480,33 @@ static char count_real_packets(struct ethhdr *ethhdr, struct batman_packet *batm
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 orig_str[ETH_STR_LEN], prev_sender_str[ETH_STR_LEN];
+ char 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;
@@ -434,21 +520,29 @@ void receive_bat_packet(struct ethhdr *ethhdr, struct batman_packet *batman_pack
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);
- bat_dbg(DBG_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: %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);
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))
@@ -456,12 +550,16 @@ void receive_bat_packet(struct ethhdr *ethhdr, struct batman_packet *batman_pack
}
if (batman_packet->version != COMPAT_VERSION) {
- bat_dbg(DBG_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) {
- bat_dbg(DBG_BATMAN, "Drop packet: received my own broadcast (sender: %s) \n", neigh_str);
+ bat_dbg(DBG_BATMAN,
+ "Drop packet: received my own broadcast (sender: %s)\n",
+ neigh_str);
return;
}
@@ -471,14 +569,24 @@ void receive_bat_packet(struct ethhdr *ethhdr, struct batman_packet *batman_pack
}
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]));
+ /* 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)) {
+ 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);
}
bat_dbg(DBG_BATMAN, "Drop packet: originator packet from myself (via neighbour) \n");
@@ -504,38 +612,50 @@ void receive_bat_packet(struct ethhdr *ethhdr, struct batman_packet *batman_pack
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))) {
+ (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: %s) \n", neigh_str);
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)) {
+ /* 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 */
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);
bat_dbg(DBG_BATMAN, "Forwarding packet: rebroadcast neighbour packet with direct link flag\n");
return;
@@ -543,7 +663,8 @@ void receive_bat_packet(struct ethhdr *ethhdr, struct batman_packet *batman_pack
/* multihop originator */
if (!is_bidirectional) {
- bat_dbg(DBG_BATMAN, "Drop packet: not received via bidirectional link\n");
+ bat_dbg(DBG_BATMAN,
+ "Drop packet: not received via bidirectional link\n");
return;
}
@@ -552,65 +673,85 @@ void receive_bat_packet(struct ethhdr *ethhdr, struct batman_packet *batman_pack
return;
}
- bat_dbg(DBG_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)
+static bool purge_orig_neigbours(struct orig_node *orig_node,
+ struct neigh_node **best_neigh_node)
{
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);
+ char neigh_str[ETH_STR_LEN], orig_str[ETH_STR_LEN];
+ struct neigh_node *neigh_node;
+ bool neigh_purged = false;
- /* for all origins... */
- while (NULL != (hashit = hash_iterate(orig_hash, hashit))) {
+ *best_neigh_node = NULL;
- 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))) {
+ /* 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);
- bat_dbg(DBG_BATMAN, "Originator timeout: originator %s, last_valid %lu\n", orig_str, (orig_node->last_valid / HZ));
+ if (time_after(jiffies,
+ (neigh_node->last_valid +
+ ((PURGE_TIMEOUT * HZ) / 1000)))) {
- hash_remove_bucket(orig_hash, hashit);
- free_orig_node(orig_node);
+ addr_to_string(neigh_str, neigh_node->addr);
+ bat_dbg(DBG_BATMAN, "Neighbour timeout: originator %s, neighbour: %s, last_valid %lu\n", orig_str, neigh_str, (neigh_node->last_valid / HZ));
+ neigh_purged = true;
+ 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;
+ }
+ }
+ return neigh_purged;
+}
- 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);
- bat_dbg(DBG_BATMAN, "Neighbour timeout: originator %s, neighbour: %s, last_valid %lu\n", orig_str, neigh_str, (neigh_node->last_valid / HZ));
+static bool purge_orig_node(struct orig_node *orig_node)
+{
+ struct neigh_node *best_neigh_node;
+ char orig_str[ETH_STR_LEN];
- neigh_purged = 1;
- list_del(list_pos);
- kfree(neigh_node);
+ addr_to_string(orig_str, orig_node->orig);
- } else {
+ if (time_after(jiffies,
+ (orig_node->last_valid +
+ ((2 * PURGE_TIMEOUT * HZ) / 1000)))) {
- if ((best_neigh_node == NULL) || (neigh_node->tq_avg > best_neigh_node->tq_avg))
- best_neigh_node = neigh_node;
+ bat_dbg(DBG_BATMAN,
+ "Originator timeout: originator %s, last_valid %lu\n",
+ orig_str, (orig_node->last_valid / HZ));
+ return true;
+ } else {
+ if (purge_orig_neigbours(orig_node, &best_neigh_node))
+ update_routes(orig_node, best_neigh_node,
+ orig_node->hna_buff,
+ orig_node->hna_buff_len);
+ }
+ return false;
+}
- }
- }
+void purge_orig(struct work_struct *work)
+{
+ struct hash_it_t *hashit = NULL;
+ struct orig_node *orig_node;
- if (neigh_purged)
- update_routes(orig_node, best_neigh_node, orig_node->hna_buff, orig_node->hna_buff_len);
+ spin_lock(&orig_hash_lock);
+ /* for all origins... */
+ while (NULL != (hashit = hash_iterate(orig_hash, hashit))) {
+ orig_node = hashit->bucket->data;
+ if (purge_orig_node(orig_node)) {
+ hash_remove_bucket(orig_hash, hashit);
+ free_orig_node(orig_node);
}
-
}
spin_unlock(&orig_hash_lock);
@@ -618,7 +759,8 @@ void purge_orig(struct work_struct *work)
start_purge_timer();
}
-static int receive_raw_packet(struct socket *raw_sock, unsigned char *packet_buff, int packet_buff_len)
+static int receive_raw_packet(struct socket *raw_sock,
+ unsigned char *packet_buff, int packet_buff_len)
{
struct kvec iov;
struct msghdr msg;
@@ -631,367 +773,495 @@ static int receive_raw_packet(struct socket *raw_sock, unsigned char *packet_buf
msg.msg_namelen = 0;
msg.msg_control = NULL;
- return kernel_recvmsg(raw_sock, &msg, &iov, 1, packet_buff_len, MSG_DONTWAIT);
+ return kernel_recvmsg(raw_sock, &msg, &iov, 1, packet_buff_len,
+ MSG_DONTWAIT);
}
-int packet_recv_thread(void *data)
+static void recv_bat_packet(struct ethhdr *ethhdr,
+ unsigned char *packet_buff,
+ int result,
+ struct batman_if *batman_if)
+{
+ /* packet with broadcast indication but unicast recipient */
+ if (!is_bcast(ethhdr->h_dest))
+ return;
+
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return;
+
+ /* drop packet if it has not at least one batman packet as payload */
+ if (result < sizeof(struct ethhdr) + sizeof(struct batman_packet))
+ return;
+
+ 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);
+}
+
+static void recv_my_icmp_packet(struct ethhdr *ethhdr,
+ struct icmp_packet *icmp_packet,
+ unsigned char *packet_buff,
+ int result)
{
- 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) {
- printk(KERN_ERR "batman-adv:Could allocate memory for the packet buffer. :(\n");
- return -1;
+ /* add data to device queue */
+ if (icmp_packet->msg_type != ECHO_REQUEST) {
+ bat_device_receive_packet(icmp_packet);
+ return;
}
- while ((!kthread_should_stop()) && (!atomic_read(&exit_cond))) {
-
- wait_event_interruptible(thread_wait, (atomic_read(&data_ready_cond) || atomic_read(&exit_cond)));
+ /* 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);
+ }
- atomic_set(&data_ready_cond, 0);
+ spin_unlock(&orig_hash_lock);
+ return;
+}
- if (kthread_should_stop() || atomic_read(&exit_cond))
- break;
+static void recv_icmp_ttl_exceeded(struct icmp_packet *icmp_packet,
+ struct ethhdr *ethhdr,
+ unsigned char *packet_buff,
+ int result,
+ struct batman_if *batman_if)
+{
+ unsigned char src_str[ETH_STR_LEN], dst_str[ETH_STR_LEN];
+ struct orig_node *orig_node;
- /* we only want to safely traverse the list, hard-interfaces
- * won't be deleted anyway as long as this thread runs. */
+ addr_to_string(src_str, icmp_packet->orig);
+ addr_to_string(dst_str, icmp_packet->dst);
- 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)
- printk(KERN_WARNING
- "batman-adv: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;
- }
+ printk(KERN_WARNING "batman-adv:Warning - can't send packet from %s to %s: ttl exceeded\n", src_str, dst_str);
- result = receive_raw_packet(batman_if->raw_sock, packet_buff, PACKBUFF_SIZE);
- if (result <= 0)
- break;
+ /* send TTL exceeded if packet is an echo request (traceroute) */
+ if (icmp_packet->msg_type != ECHO_REQUEST)
+ return;
- if (result < sizeof(struct ethhdr) + 2)
- 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);
- ethhdr = (struct ethhdr *)packet_buff;
- batman_packet = (struct batman_packet *)(packet_buff + sizeof(struct ethhdr));
+ }
- if (batman_packet->version != COMPAT_VERSION) {
- bat_dbg(DBG_BATMAN, "Drop packet: incompatible batman version (%i)\n", batman_packet->version);
- continue;
- }
+ spin_unlock(&orig_hash_lock);
+}
- 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;
+static void recv_icmp_packet(struct ethhdr *ethhdr,
+ unsigned char *packet_buff,
+ int result,
+ struct batman_if *batman_if)
+{
+ struct icmp_packet *icmp_packet;
+ struct orig_node *orig_node;
- 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);
+ /* packet with unicast indication but broadcast recipient */
+ if (is_bcast(ethhdr->h_dest))
+ return;
- break;
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return;
- /* batman icmp packet */
- case BAT_ICMP:
- /* packet with unicast indication but broadcast recipient */
- if (is_bcast(ethhdr->h_dest))
- continue;
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return;
- /* 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 icmp_packet))
+ return;
- /* not for me */
- if (!is_my_mac(ethhdr->h_dest))
- continue;
+ icmp_packet = (struct icmp_packet *)
+ (packet_buff + sizeof(struct ethhdr));
- /* drop packet if it has not necessary minimum size */
- if (result < sizeof(struct ethhdr) + sizeof(struct icmp_packet))
- continue;
+ /* packet for me */
+ if (is_my_mac(icmp_packet->dst))
+ recv_my_icmp_packet(ethhdr, icmp_packet, packet_buff, result);
- icmp_packet = (struct icmp_packet *)(packet_buff + sizeof(struct ethhdr));
+ /* TTL exceeded */
+ if (icmp_packet->ttl < 2) {
+ recv_icmp_ttl_exceeded(icmp_packet, ethhdr, packet_buff, result,
+ batman_if);
+ return;
- /* 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;
- }
+ /* get routing information */
+ spin_lock(&orig_hash_lock);
+ orig_node = ((struct orig_node *)
+ hash_find(orig_hash, icmp_packet->dst));
- /* 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)) {
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
+ /* decrement ttl */
+ icmp_packet->ttl--;
- 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;
+ /* route it */
+ 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);
+}
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
+static void recv_unicast_packet(struct ethhdr *ethhdr,
+ unsigned char *packet_buff,
+ int result,
+ struct batman_if *batman_if)
+{
+ struct unicast_packet *unicast_packet;
+ unsigned char src_str[ETH_STR_LEN], dst_str[ETH_STR_LEN];
+ struct orig_node *orig_node;
+ int hdr_size = sizeof(struct ethhdr) + sizeof(struct unicast_packet);
- }
+ /* packet with unicast indication but broadcast recipient */
+ if (is_bcast(ethhdr->h_dest))
+ return;
- spin_unlock(&orig_hash_lock);
- continue;
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return;
- }
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return;
- /* TTL exceeded */
- if (icmp_packet->ttl < 2) {
+ /* drop packet if it has not necessary minimum size */
+ if (result < hdr_size)
+ return;
- addr_to_string(src_str, icmp_packet->orig);
- addr_to_string(dst_str, icmp_packet->dst);
+ unicast_packet = (struct unicast_packet *)
+ (packet_buff + sizeof(struct ethhdr));
- printk(KERN_WARNING "batman-adv:Warning - can't send packet from %s to %s: ttl exceeded\n", src_str, dst_str);
+ /* packet for me */
+ if (is_my_mac(unicast_packet->dest)) {
+ interface_rx(soft_device, packet_buff + hdr_size,
+ result - hdr_size);
+ return;
- /* 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));
+ /* 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);
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
+ printk(KERN_WARNING "batman-adv:Warning - can't send packet from %s to %s: ttl exceeded\n", src_str, dst_str);
+ return;
+ }
- 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;
+ /* get routing information */
+ spin_lock(&orig_hash_lock);
+ 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)) {
+ /* 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);
+ }
+ spin_unlock(&orig_hash_lock);
+}
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
- }
+static void recv_bcast_packet(struct ethhdr *ethhdr,
+ unsigned char *packet_buff,
+ int result,
+ struct batman_if *batman_if)
+{
+ struct orig_node *orig_node;
+ struct bcast_packet *bcast_packet;
+ int hdr_size = sizeof(struct ethhdr) + sizeof(struct bcast_packet);
- spin_unlock(&orig_hash_lock);
- continue;
+ /* packet with broadcast indication but unicast recipient */
+ if (!is_bcast(ethhdr->h_dest))
+ return;
- }
+ /* packet with broadcast sender address */
+ if (is_bcast(ethhdr->h_source))
+ return;
- /* get routing information */
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, icmp_packet->dst));
+ /* drop packet if it has not necessary minimum size */
+ if (result < hdr_size)
+ return;
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
+ /* ignore broadcasts sent by myself */
+ if (is_my_mac(ethhdr->h_source))
+ return;
- /* decrement ttl */
- icmp_packet->ttl--;
+ bcast_packet = (struct bcast_packet *)
+ (packet_buff + sizeof(struct ethhdr));
- /* route it */
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
- }
+ /* ignore broadcasts originated by myself */
+ if (is_my_mac(bcast_packet->orig))
+ return;
- spin_unlock(&orig_hash_lock);
- break;
+ spin_lock(&orig_hash_lock);
+ orig_node = ((struct orig_node *)
+ hash_find(orig_hash, bcast_packet->orig));
- /* unicast packet */
- case BAT_UNICAST:
- /* packet with unicast indication but broadcast recipient */
- if (is_bcast(ethhdr->h_dest))
- continue;
+ if (orig_node == NULL) {
+ spin_unlock(&orig_hash_lock);
+ return;
+ }
- /* packet with broadcast sender address */
- if (is_bcast(ethhdr->h_source))
- continue;
+ /* 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);
+ return;
+ }
- /* not for me */
- if (!is_my_mac(ethhdr->h_dest))
- continue;
+ /* 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);
- /* drop packet if it has not necessary minimum size */
- if (result < sizeof(struct ethhdr) + sizeof(struct unicast_packet))
- continue;
+ spin_unlock(&orig_hash_lock);
- unicast_packet = (struct unicast_packet *)(packet_buff + sizeof(struct ethhdr));
+ /* broadcast for me */
+ interface_rx(soft_device, packet_buff + hdr_size, result - hdr_size);
- /* packet for me */
- if (is_my_mac(unicast_packet->dest)) {
+ /* rebroadcast packet */
+ add_bcast_packet_to_list(packet_buff + sizeof(struct ethhdr),
+ result - sizeof(struct ethhdr));
+}
- interface_rx(soft_device, packet_buff + sizeof(struct ethhdr) + sizeof(struct unicast_packet), result - sizeof(struct ethhdr) - sizeof(struct unicast_packet));
- continue;
+static void recv_vis_packet(struct ethhdr *ethhdr,
+ unsigned char *packet_buff,
+ int result)
+{
+ struct vis_packet *vis_packet;
+ int hdr_size = sizeof(struct ethhdr) + sizeof(struct vis_packet);
+ int vis_info_len;
- }
+ /* drop if too short. */
+ if (result < hdr_size)
+ return;
- /* 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);
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return;
- printk(KERN_WARNING "batman-adv:Warning - can't send packet from %s to %s: ttl exceeded\n", src_str, dst_str);
- continue;
- }
+ vis_packet = (struct vis_packet *)(packet_buff + sizeof(struct ethhdr));
+ vis_info_len = result - hdr_size;
- /* get routing information */
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, unicast_packet->dest));
+ /* ignore own packets */
+ if (is_my_mac(vis_packet->vis_orig))
+ return;
- if ((orig_node != NULL) && (orig_node->batman_if != NULL) && (orig_node->router != NULL)) {
- /* decrement ttl */
- unicast_packet->ttl--;
+ if (is_my_mac(vis_packet->sender_orig))
+ return;
- /* route it */
- send_raw_packet(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr),
- orig_node->batman_if,
- orig_node->router->addr);
- }
+ switch (vis_packet->vis_type) {
+ case VIS_TYPE_SERVER_SYNC:
+ receive_server_sync_packet(vis_packet, vis_info_len);
+ break;
- spin_unlock(&orig_hash_lock);
- break;
+ case VIS_TYPE_CLIENT_UPDATE:
+ receive_client_update_packet(vis_packet, vis_info_len);
+ break;
- /* broadcast packet */
- case BAT_BCAST:
- /* packet with broadcast indication but unicast recipient */
- if (!is_bcast(ethhdr->h_dest))
- continue;
+ default: /* ignore unknown packet */
+ break;
+ }
+}
- /* packet with broadcast sender address */
- if (is_bcast(ethhdr->h_source))
- continue;
+static int recv_one_packet(struct batman_if *batman_if,
+ unsigned char *packet_buff)
+{
+ int result;
+ struct ethhdr *ethhdr;
+ struct batman_packet *batman_packet;
- /* drop packet if it has not necessary minimum size */
- if (result < sizeof(struct ethhdr) + sizeof(struct bcast_packet))
- continue;
+ result = receive_raw_packet(batman_if->raw_sock, packet_buff,
+ PACKBUFF_SIZE);
+ if (result <= 0)
+ return result;
- /* ignore broadcasts sent by myself */
- if (is_my_mac(ethhdr->h_source))
- continue;
+ if (result < sizeof(struct ethhdr) + 2)
+ return 0;
- bcast_packet = (struct bcast_packet *)(packet_buff + sizeof(struct ethhdr));
+ ethhdr = (struct ethhdr *)packet_buff;
+ batman_packet = (struct batman_packet *)
+ (packet_buff + sizeof(struct ethhdr));
- /* ignore broadcasts originated by myself */
- if (is_my_mac(bcast_packet->orig))
- continue;
+ if (batman_packet->version != COMPAT_VERSION) {
+ bat_dbg(DBG_BATMAN,
+ "Drop packet: incompatible batman version (%i)\n",
+ batman_packet->version);
+ return 0;
+ }
- spin_lock(&orig_hash_lock);
- orig_node = ((struct orig_node *)hash_find(orig_hash, bcast_packet->orig));
+ switch (batman_packet->packet_type) {
+ /* batman originator packet */
+ case BAT_PACKET:
+ recv_bat_packet(ethhdr, packet_buff, result, batman_if);
+ break;
+
+ /* batman icmp packet */
+ case BAT_ICMP:
+ recv_icmp_packet(ethhdr, packet_buff, result, batman_if);
+ break;
+
+ /* unicast packet */
+ case BAT_UNICAST:
+ recv_unicast_packet(ethhdr, packet_buff, result, batman_if);
+ break;
+
+ /* broadcast packet */
+ case BAT_BCAST:
+ recv_bcast_packet(ethhdr,
+ packet_buff, result, batman_if);
+ break;
+
+ /* vis packet */
+ case BAT_VIS:
+ recv_vis_packet(ethhdr, packet_buff, result);
+ break;
+ }
+ return 0;
+}
- if (orig_node == NULL) {
- spin_unlock(&orig_hash_lock);
- continue;
- }
- /* 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;
- }
+static int discard_one_packet(struct batman_if *batman_if,
+ unsigned char *packet_buff)
+{
+ int result = -EAGAIN;
- /* 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);
+ if (batman_if->if_active != IF_TO_BE_ACTIVATED) {
+ printk(KERN_WARNING
+ "batman-adv:Could not read from deactivated interface %s!\n",
+ batman_if->dev);
+ } else {
+ if (batman_if->raw_sock)
+ result = receive_raw_packet(batman_if->raw_sock,
+ packet_buff,
+ PACKBUFF_SIZE);
+ }
+ return result;
+}
- spin_unlock(&orig_hash_lock);
- /* broadcast for me */
- interface_rx(soft_device, packet_buff + sizeof(struct ethhdr) + sizeof(struct bcast_packet), result - sizeof(struct ethhdr) - sizeof(struct bcast_packet));
+static bool is_interface_active(struct batman_if *batman_if)
+{
+ if (batman_if->if_active != IF_ACTIVE)
+ return false;
- /* rebroadcast packet */
- add_bcast_packet_to_list(packet_buff + sizeof(struct ethhdr),
- result - sizeof(struct ethhdr));
+ return true;
+}
- break;
+static void service_interface(struct batman_if *batman_if,
+ unsigned char *packet_buff)
- /* vis packet */
- case BAT_VIS:
- /* drop if too short. */
- if (result < sizeof(struct ethhdr) + sizeof(struct vis_packet))
- continue;
+{
+ int result;
- /* not for me */
- if (!is_my_mac(ethhdr->h_dest))
- continue;
+ do {
+ if (is_interface_active(batman_if))
+ result = recv_one_packet(batman_if, packet_buff);
+ else
+ result = discard_one_packet(batman_if, packet_buff);
+ } while (result >= 0);
- vis_packet = (struct vis_packet *)(packet_buff + sizeof(struct ethhdr));
- vis_info_len = result - sizeof(struct ethhdr) - sizeof(struct vis_packet);
+ /* we perform none blocking reads, so EAGAIN indicates there
+ are no more packets to read. Anything else is a real
+ error.*/
- /* ignore own packets */
- if (is_my_mac(vis_packet->vis_orig))
- continue;
+ if ((result < 0) && (result != -EAGAIN))
+ printk(KERN_ERR "batman-adv:Could not receive packet from interface %s: %i\n", batman_if->dev, result);
+}
- if (is_my_mac(vis_packet->sender_orig))
- continue;
+static void service_interfaces(unsigned char *packet_buffer)
+{
+ struct batman_if *batman_if;
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ rcu_read_unlock();
+ service_interface(batman_if, packet_buffer);
+ rcu_read_lock();
+ }
+ rcu_read_unlock();
+}
- switch (vis_packet->vis_type) {
- case VIS_TYPE_SERVER_SYNC:
- receive_server_sync_packet(vis_packet, vis_info_len);
- break;
- case VIS_TYPE_CLIENT_UPDATE:
- receive_client_update_packet(vis_packet, vis_info_len);
- break;
+int packet_recv_thread(void *data)
+{
+ unsigned char *packet_buff;
- default: /* ignore unknown packet */
- break;
- }
+ atomic_set(&data_ready_cond, 0);
+ atomic_set(&exit_cond, 0);
+ packet_buff = kmalloc(PACKBUFF_SIZE, GFP_KERNEL);
+ if (!packet_buff) {
+ printk(KERN_ERR"batman-adv:Could allocate memory for the packet buffer. :(\n");
+ return -1;
+ }
- break;
- }
+ while ((!kthread_should_stop()) && (!atomic_read(&exit_cond))) {
- }
+ wait_event_interruptible(thread_wait,
+ (atomic_read(&data_ready_cond) ||
+ atomic_read(&exit_cond)));
- if ((result < 0) && (result != -EAGAIN))
- printk(KERN_ERR "batman-adv:Could not receive packet from interface %s: %i\n", batman_if->dev, result);
+ atomic_set(&data_ready_cond, 0);
- /* lock for the next iteration */
- rcu_read_lock();
- }
- rcu_read_unlock();
+ if (kthread_should_stop() || atomic_read(&exit_cond))
+ break;
+ service_interfaces(packet_buff);
}
kfree(packet_buff);
- /* do not exit until kthread_stop() is actually called, otherwise it will wait for us
- * forever. */
+ /* do not exit until kthread_stop() is actually called,
+ * otherwise it will wait for us forever. */
while (!kthread_should_stop())
schedule();
--
batman-adv
