[B.A.T.M.A.N.] batman: keep batman_ogm_packet ->seqno net-endian all along

Al Viro
2012-04-18T18:11:50Z

Ditto for its ->seqno...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
net/batman-adv/bat_iv_ogm.c | 25 ++++++++++---------------
net/batman-adv/packet.h | 2 +-
2 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 5aa8861..cc6d4c3 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -34,11 +34,11 @@ static struct neigh_node *bat_iv_ogm_neigh_new(struct hard_iface *hard_iface,
const uint8_t *neigh_addr,
struct orig_node *orig_node,
struct orig_node *orig_neigh,
- uint32_t seqno)
+ __be32 seqno)
{
struct neigh_node *neigh_node;

- neigh_node = neigh_node_new(hard_iface, neigh_addr, seqno);
+ neigh_node = neigh_node_new(hard_iface, neigh_addr, ntohl(seqno));
if (!neigh_node)
goto out;

@@ -543,8 +543,6 @@ static void bat_iv_ogm_forward(struct orig_node *orig_node,
"Forwarding packet: tq: %i, ttl: %i\n",
batman_ogm_packet->tq, batman_ogm_packet->header.ttl);

- batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno);
-
/* switch of primaries first hop flag when forwarding */
batman_ogm_packet->flags &= ~PRIMARIES_FIRST_HOP;
if (is_single_hop_neigh)
@@ -868,13 +866,14 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
int32_t seq_diff;
int need_update = 0;
int set_mark, ret = -1;
+ uint32_t seqno = ntohl(batman_ogm_packet->seqno);

orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig);
if (!orig_node)
return 0;

spin_lock_bh(&orig_node->ogm_cnt_lock);
- seq_diff = batman_ogm_packet->seqno - orig_node->last_real_seqno;
+ seq_diff = seqno - orig_node->last_real_seqno;

/* signalize caller that the packet is to be dropped. */
if (!hlist_empty(&orig_node->neigh_list) &&
@@ -888,7 +887,7 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,

is_duplicate |= bat_test_bit(tmp_neigh_node->real_bits,
orig_node->last_real_seqno,
- batman_ogm_packet->seqno);
+ seqno);

if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
(tmp_neigh_node->if_incoming == if_incoming))
@@ -910,8 +909,8 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
if (need_update) {
bat_dbg(DBG_BATMAN, bat_priv,
"updating last_seqno: old %u, new %u\n",
- orig_node->last_real_seqno, batman_ogm_packet->seqno);
- orig_node->last_real_seqno = batman_ogm_packet->seqno;
+ orig_node->last_real_seqno, seqno);
+ orig_node->last_real_seqno = seqno;
}

ret = is_duplicate;
@@ -967,7 +966,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
"Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
ethhdr->h_source, if_incoming->net_dev->name,
if_incoming->net_dev->dev_addr, batman_ogm_packet->orig,
- batman_ogm_packet->prev_sender, batman_ogm_packet->seqno,
+ batman_ogm_packet->prev_sender, ntohl(batman_ogm_packet->seqno),
batman_ogm_packet->ttvn, ntohs(batman_ogm_packet->tt_crc),
batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq,
batman_ogm_packet->header.ttl,
@@ -1039,7 +1038,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
word = &(orig_neigh_node->bcast_own[offset]);
bat_set_bit(word,
if_incoming_seqno -
- batman_ogm_packet->seqno - 2);
+ ntohl(batman_ogm_packet->seqno) - 2);
orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
bitmap_weight(word, TQ_LOCAL_WINDOW_SIZE);
spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);
@@ -1132,7 +1131,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
* seqno and similar ttl as the non-duplicate */
if (is_bidirectional &&
(!is_duplicate ||
- ((orig_node->last_real_seqno == batman_ogm_packet->seqno) &&
+ ((orig_node->last_real_seqno == ntohl(batman_ogm_packet->seqno)) &&
(orig_node->last_ttl - 3 <= batman_ogm_packet->header.ttl))))
bat_iv_ogm_orig_update(bat_priv, orig_node, ethhdr,
batman_ogm_packet, if_incoming,
@@ -1210,10 +1209,6 @@ static int bat_iv_ogm_receive(struct sk_buff *skb,

/* unpack the aggregated packets and process them one by one */
do {
- /* network to host order for our 32bit seqno and the
- orig_interval */
- batman_ogm_packet->seqno = ntohl(batman_ogm_packet->seqno);
-
tt_buff = packet_buff + buff_pos + BATMAN_OGM_HLEN;

bat_iv_ogm_process(ethhdr, batman_ogm_packet,
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 61a7fe0..ad39938 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -125,7 +125,7 @@ struct batman_header {
struct batman_ogm_packet {
struct batman_header header;
uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
- uint32_t seqno;
+ __be32 seqno;
uint8_t orig[ETH_ALEN];
uint8_t prev_sender[ETH_ALEN];
uint8_t gw_flags; /* flags related to gateway class */
--
1.7.2.5