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Revert "mac80211: use a struct for bss->mesh_config" 

This reverts commit 6c4711b469.

That patch breaks mesh config comparison between beacons/probe reponses, so
every beacon from a mesh network would be added as a new bss. Since the
comparison has to be performed for every received beacon I believe it is best to
save the mesh config in a format easy to compare, rather than do a bunch of
unaligned accesses to compare field by field.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
John W. Linville 2008-04-08 14:15:46 -04:00
parent 8eefca4888
commit 2473670163
4 changed files with 18 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
net/mac80211/ieee80211_i.h
View File

@ -69,14 +69,6 @@ struct ieee80211_fragment_entry {
u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
};
struct bss_mesh_config {
u32 path_proto_id;
u32 path_metric_id;
u32 cong_control_id;
u32 channel_precedence;
u8 mesh_version;
};
struct ieee80211_sta_bss {
struct list_head list;
@ -102,7 +94,7 @@ struct ieee80211_sta_bss {
#ifdef CONFIG_MAC80211_MESH
u8 *mesh_id;
size_t mesh_id_len;
struct bss_mesh_config *mesh_cfg;
u8 *mesh_cfg;
#endif
#define IEEE80211_MAX_SUPP_RATES 32
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
@ -121,8 +113,7 @@ struct ieee80211_sta_bss {
u8 erp_value;
};
static inline
struct bss_mesh_config *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)
{
#ifdef CONFIG_MAC80211_MESH
return bss->mesh_cfg;

32
net/mac80211/ieee80211_sta.c
View File

@ -27,7 +27,6 @@
#include <linux/rtnetlink.h>
#include <net/iw_handler.h>
#include <asm/types.h>
#include <asm/unaligned.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
@ -2123,11 +2122,6 @@ ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
}
#ifdef CONFIG_MAC80211_MESH
static inline u32 bss_mesh_cfg_get(u8 *mesh_cfg, u8 offset)
{
return be32_to_cpu(get_unaligned((__be32 *) (mesh_cfg + offset)));
}
static struct ieee80211_sta_bss *
ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
u8 *mesh_cfg, int freq)
@ -2167,7 +2161,7 @@ ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
if (!bss)
return NULL;
bss->mesh_cfg = kmalloc(sizeof(struct bss_mesh_config), GFP_ATOMIC);
bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
if (!bss->mesh_cfg) {
kfree(bss);
return NULL;
@ -2185,12 +2179,7 @@ ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
atomic_inc(&bss->users);
atomic_inc(&bss->users);
bss->mesh_cfg->mesh_version = mesh_cfg[0];
bss->mesh_cfg->path_proto_id = bss_mesh_cfg_get(mesh_cfg, PP_OFFSET);
bss->mesh_cfg->path_metric_id = bss_mesh_cfg_get(mesh_cfg, PM_OFFSET);
bss->mesh_cfg->cong_control_id = bss_mesh_cfg_get(mesh_cfg, CC_OFFSET);
bss->mesh_cfg->channel_precedence = bss_mesh_cfg_get(mesh_cfg,
CP_OFFSET);
memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
bss->mesh_id_len = mesh_id_len;
bss->freq = freq;
spin_lock_bh(&local->sta_bss_lock);
@ -4067,33 +4056,36 @@ ieee80211_sta_scan_result(struct net_device *dev,
if (bss_mesh_cfg(bss)) {
char *buf;
struct bss_mesh_config *cfg = bss_mesh_cfg(bss);
u8 *cfg = bss_mesh_cfg(bss);
buf = kmalloc(50, GFP_ATOMIC);
if (buf) {
memset(&iwe, 0, sizeof(iwe));
iwe.cmd = IWEVCUSTOM;
sprintf(buf, "Mesh network (version %d)",
cfg->mesh_version);
sprintf(buf, "Mesh network (version %d)", cfg[0]);
iwe.u.data.length = strlen(buf);
current_ev = iwe_stream_add_point(current_ev, end_buf,
&iwe, buf);
sprintf(buf, "Path Selection Protocol ID: "
"0x%08X", cfg->path_proto_id);
"0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
cfg[4]);
iwe.u.data.length = strlen(buf);
current_ev = iwe_stream_add_point(current_ev, end_buf,
&iwe, buf);
sprintf(buf, "Path Selection Metric ID: "
"0x%08X", cfg->path_metric_id);
"0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
cfg[8]);
iwe.u.data.length = strlen(buf);
current_ev = iwe_stream_add_point(current_ev, end_buf,
&iwe, buf);
sprintf(buf, "Congestion Control Mode ID: "
"0x%08X", cfg->cong_control_id);
"0x%02X%02X%02X%02X", cfg[9], cfg[10],
cfg[11], cfg[12]);
iwe.u.data.length = strlen(buf);
current_ev = iwe_stream_add_point(current_ev, end_buf,
&iwe, buf);
sprintf(buf, "Channel Precedence: "
"0x%08X", cfg->channel_precedence);
"0x%02X%02X%02X%02X", cfg[13], cfg[14],
cfg[15], cfg[16]);
iwe.u.data.length = strlen(buf);
current_ev = iwe_stream_add_point(current_ev, end_buf,
&iwe, buf);

4
net/mac80211/mesh.c
View File

@ -11,6 +11,10 @@
#include "ieee80211_i.h"
#include "mesh.h"
#define PP_OFFSET 1 /* Path Selection Protocol */
#define PM_OFFSET 5 /* Path Selection Metric */
#define CC_OFFSET 9 /* Congestion Control Mode */
#define CAPAB_OFFSET 17
#define ACCEPT_PLINKS 0x80
int mesh_allocated;

10
net/mac80211/mesh.h
View File

@ -157,16 +157,6 @@ struct mesh_rmc {
*/
#define MESH_CFG_CMP_LEN 17
/*
* Components offset within the mesh configuration IE
*/
#define PP_OFFSET 1 /* Path Selection Protocol */
#define PM_OFFSET 5 /* Path Selection Metric */
#define CC_OFFSET 9 /* Congestion Control Mode */
#define CP_OFFSET 13 /* Channel Precedence */
#define CAPAB_OFFSET 17 /* Mesh Capabilities */
/* Default values, timeouts in ms */
#define MESH_TTL 5
#define MESH_MAX_RETR 3