commit 51ceddade0fb1e15f080b2555f3b3e1d68c6707e
author Luis Carlos Cobo <luisca@cozybit.com> Wed Apr 23 12:15:29 2008 -0700
committer John W. Linville <linville@tuxdriver.com> Wed Apr 30 20:34:26 2008 -0400
tree 341183c318900251890f341e4b672f33791ae6b1
parent 809917903127804c2b2ac76342ab0f29f4b394d3

mac80211: use 4-byte mesh sequence number

This follows the new 802.11s/D2.0 draft.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/linux/ieee80211.h

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 529f301..0b5e03e 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -113,7 +113,7 @@
 struct ieee80211s_hdr {
 	u8 flags;
 	u8 ttl;
-	u8 seqnum[3];
+	__le32 seqnum;
 	u8 eaddr1[6];
 	u8 eaddr2[6];
 	u8 eaddr3[6];

net/mac80211/ieee80211_i.h

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 8e53ce7..c7314bf 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -354,7 +354,7 @@
 	int preq_queue_len;
 	struct mesh_stats mshstats;
 	struct mesh_config mshcfg;
-	u8 mesh_seqnum[3];
+	u32 mesh_seqnum;
 	bool accepting_plinks;
 #endif
 	u16 aid;

net/mac80211/mesh.c

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 594a335..f76bc26 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -8,6 +8,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <asm/unaligned.h>
 #include "ieee80211_i.h"
 #include "mesh.h"
 
@@ -167,8 +168,8 @@
 	struct rmc_entry *p, *n;
 
 	/* Don't care about endianness since only match matters */
-	memcpy(&seqnum, mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
-	idx = mesh_hdr->seqnum[0] & rmc->idx_mask;
+	memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
+	idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
 	list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) {
 		++entries;
 		if (time_after(jiffies, p->exp_time) ||
@@ -393,16 +394,8 @@
 {
 	meshhdr->flags = 0;
 	meshhdr->ttl = sdata->u.sta.mshcfg.dot11MeshTTL;
-
-	meshhdr->seqnum[0] = sdata->u.sta.mesh_seqnum[0]++;
-	meshhdr->seqnum[1] = sdata->u.sta.mesh_seqnum[1];
-	meshhdr->seqnum[2] = sdata->u.sta.mesh_seqnum[2];
-
-	if (sdata->u.sta.mesh_seqnum[0] == 0) {
-		sdata->u.sta.mesh_seqnum[1]++;
-		if (sdata->u.sta.mesh_seqnum[1] == 0)
-			sdata->u.sta.mesh_seqnum[2]++;
-	}
+	put_unaligned(cpu_to_le32(sdata->u.sta.mesh_seqnum), &meshhdr->seqnum);
+	sdata->u.sta.mesh_seqnum++;
 
 	return 5;
 }

net/mac80211/mesh.h

diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 742003d..9f8cb76 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -139,7 +139,7 @@
 
 struct mesh_rmc {
 	struct rmc_entry bucket[RMC_BUCKETS];
-	u8 idx_mask;
+	u32 idx_mask;
 };