mac80211: use 4-byte mesh sequence number
Luis Carlos Cobo [Wed, 23 Apr 2008 19:15:29 +0000 (12:15 -0700)]
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
net/mac80211/ieee80211_i.h
net/mac80211/mesh.c
net/mac80211/mesh.h

index 529f301..0b5e03e 100644 (file)
@@ -113,7 +113,7 @@ struct ieee80211_hdr {
 struct ieee80211s_hdr {
        u8 flags;
        u8 ttl;
-       u8 seqnum[3];
+       __le32 seqnum;
        u8 eaddr1[6];
        u8 eaddr2[6];
        u8 eaddr3[6];
index 8e53ce7..c7314bf 100644 (file)
@@ -354,7 +354,7 @@ struct ieee80211_if_sta {
        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;
index 594a335..f76bc26 100644 (file)
@@ -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 @@ int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
        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 @@ int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
 {
        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;
 }
index 742003d..9f8cb76 100644 (file)
@@ -139,7 +139,7 @@ struct rmc_entry {
 
 struct mesh_rmc {
        struct rmc_entry bucket[RMC_BUCKETS];
-       u8 idx_mask;
+       u32 idx_mask;
 };