mac80211: use a structure to hold the mesh config information element

Signed-off-by: Rui Paulo <rpaulo@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 49b1abd..afa8e0a 100644 (file)
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -115,7 +115,6 @@
 #define IEEE80211_MAX_SSID_LEN         32
 
 #define IEEE80211_MAX_MESH_ID_LEN      32
-#define IEEE80211_MESH_CONFIG_LEN      7
 
 #define IEEE80211_QOS_CTL_LEN          2
 #define IEEE80211_QOS_CTL_TID_MASK     0x000F
@@ -555,6 +554,21 @@ struct ieee80211_tim_ie {
 } __attribute__ ((packed));
 
 /**
+ * struct ieee80211_meshconf_ie
+ *
+ * This structure refers to "Mesh Configuration information element"
+ */
+struct ieee80211_meshconf_ie {
+       u8 meshconf_psel;
+       u8 meshconf_pmetric;
+       u8 meshconf_congest;
+       u8 meshconf_synch;
+       u8 meshconf_auth;
+       u8 meshconf_form;
+       u8 meshconf_cap;
+} __attribute__ ((packed));
+
+/**
  * struct ieee80211_rann_ie
  *
  * This structure refers to "Root Announcement information element"

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 74e7993..87d27f4 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -798,7 +798,7 @@ struct ieee802_11_elems {
        u8 *wmm_param;
        struct ieee80211_ht_cap *ht_cap_elem;
        struct ieee80211_ht_info *ht_info_elem;
-       u8 *mesh_config;
+       struct ieee80211_meshconf_ie *mesh_config;
        u8 *mesh_id;
        u8 *peer_link;
        u8 *preq;
@@ -826,7 +826,6 @@ struct ieee802_11_elems {
        u8 ext_supp_rates_len;
        u8 wmm_info_len;
        u8 wmm_param_len;
-       u8 mesh_config_len;
        u8 mesh_id_len;
        u8 peer_link_len;
        u8 preq_len;

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 3a0683b..51adb11 100644 (file)
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -16,12 +16,6 @@
 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
 #define IEEE80211_MESH_RANN_INTERVAL        (1 * HZ)
 
-#define MESHCONF_PP_OFFSET     0               /* Path Selection Protocol */
-#define MESHCONF_PM_OFFSET     1               /* Path Selection Metric   */
-#define MESHCONF_CC_OFFSET     2               /* Congestion Control Mode */
-#define MESHCONF_SP_OFFSET     3               /* Synchronization Protocol */
-#define MESHCONF_AUTH_OFFSET   4               /* Authentication Protocol */
-#define MESHCONF_CAPAB_OFFSET  6
 #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01
 #define MESHCONF_CAPAB_FORWARDING    0x08
 
@@ -87,12 +81,11 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_dat
         */
        if (ifmsh->mesh_id_len == ie->mesh_id_len &&
                memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
-               (ifmsh->mesh_pp_id == *(ie->mesh_config + MESHCONF_PP_OFFSET))&&
-               (ifmsh->mesh_pm_id == *(ie->mesh_config + MESHCONF_PM_OFFSET))&&
-               (ifmsh->mesh_cc_id == *(ie->mesh_config + MESHCONF_CC_OFFSET))&&
-               (ifmsh->mesh_sp_id == *(ie->mesh_config + MESHCONF_SP_OFFSET))&&
-               (ifmsh->mesh_auth_id == *(ie->mesh_config +
-                   MESHCONF_AUTH_OFFSET)))
+               (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
+               (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
+               (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
+               (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
+               (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))
                return true;
 
        return false;
@@ -105,7 +98,7 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_dat
  */
 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
 {
-       return (*(ie->mesh_config + MESHCONF_CAPAB_OFFSET) &
+       return (ie->mesh_config->meshconf_cap &
            MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
 }
 
@@ -262,9 +255,9 @@ void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
        if (sdata->u.mesh.mesh_id_len)
                memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len);
 
-       pos = skb_put(skb, 2 + IEEE80211_MESH_CONFIG_LEN);
+       pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie));
        *pos++ = WLAN_EID_MESH_CONFIG;
-       *pos++ = IEEE80211_MESH_CONFIG_LEN;
+       *pos++ = sizeof(struct ieee80211_meshconf_ie);
 
        /* Active path selection protocol ID */
        *pos++ = sdata->u.mesh.mesh_pp_id;

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 5ae1bf3..2fb0432 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -666,8 +666,8 @@ u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
                        elems->mesh_id_len = elen;
                        break;
                case WLAN_EID_MESH_CONFIG:
-                       elems->mesh_config = pos;
-                       elems->mesh_config_len = elen;
+                       if (elen >= sizeof(struct ieee80211_meshconf_ie))
+                               elems->mesh_config = (void *)pos;
                        break;
                case WLAN_EID_PEER_LINK:
                        elems->peer_link = pos;

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index e2d344f..d03447d 100644 (file)
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -217,7 +217,7 @@ static bool is_mesh(struct cfg80211_bss *a,
                     a->len_information_elements);
        if (!ie)
                return false;
-       if (ie[1] != IEEE80211_MESH_CONFIG_LEN)
+       if (ie[1] != sizeof(struct ieee80211_meshconf_ie))
                return false;
 
        /*
@@ -225,7 +225,8 @@ static bool is_mesh(struct cfg80211_bss *a,
         * comparing since that may differ between stations taking
         * part in the same mesh.
         */
-       return memcmp(ie + 2, meshcfg, IEEE80211_MESH_CONFIG_LEN - 2) == 0;
+       return memcmp(ie + 2, meshcfg,
+           sizeof(struct ieee80211_meshconf_ie) - 2) == 0;
 }
 
 static int cmp_bss(struct cfg80211_bss *a,
@@ -399,7 +400,7 @@ cfg80211_bss_update(struct cfg80211_registered_device *dev,
                                  res->pub.information_elements,
                                  res->pub.len_information_elements);
                if (!meshid || !meshcfg ||
-                   meshcfg[1] != IEEE80211_MESH_CONFIG_LEN) {
+                   meshcfg[1] != sizeof(struct ieee80211_meshconf_ie)) {
                        /* bogus mesh */
                        kref_put(&res->ref, bss_release);
                        return NULL;
@@ -865,7 +866,7 @@ ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info,
                        break;
                case WLAN_EID_MESH_CONFIG:
                        ismesh = true;
-                       if (ie[1] != IEEE80211_MESH_CONFIG_LEN)
+                       if (ie[1] != sizeof(struct ieee80211_meshconf_ie))
                                break;
                        buf = kmalloc(50, GFP_ATOMIC);
                        if (!buf)