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Commit 4a3cb702 authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: constify IE parsing 



Make all the parsed IE pointers const, and propagate
the change to all the users etc.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 50640f16

include/linux/ieee80211.h

+1 −1
Original line number Original line Diff line number Diff line
@@ -2152,7 +2152,7 @@ static inline unsigned long ieee80211_tu_to_usec(unsigned long tu) 
 * @tim_len: length of the TIM IE

 * @tim_len: length of the TIM IE

 * @aid: the AID to look for

 * @aid: the AID to look for

 */

 */

static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,

static inline bool ieee80211_check_tim(const struct ieee80211_tim_ie *tim,

				       u8 tim_len, u16 aid)

				       u8 tim_len, u16 aid)

{

{

	u8 mask;

	u8 mask;

net/mac80211/ht.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -94,7 +94,7 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, 




bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,

bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,

				       struct ieee80211_supported_band *sband,

				       struct ieee80211_supported_band *sband,

				       struct ieee80211_ht_cap *ht_cap_ie,

				       const struct ieee80211_ht_cap *ht_cap_ie,

				       struct sta_info *sta)

				       struct sta_info *sta)

{

{

	struct ieee80211_sta_ht_cap ht_cap;

	struct ieee80211_sta_ht_cap ht_cap;

net/mac80211/ieee80211_i.h

+44 −43
Original line number Original line Diff line number Diff line
@@ -1163,41 +1163,41 @@ struct ieee80211_ra_tid { 




/* Parsed Information Elements */

/* Parsed Information Elements */

struct ieee802_11_elems {

struct ieee802_11_elems {

	u8 *ie_start;

	const u8 *ie_start;

	size_t total_len;

	size_t total_len;





	/* pointers to IEs */

	/* pointers to IEs */

	u8 *ssid;

	const u8 *ssid;

	u8 *supp_rates;

	const u8 *supp_rates;

	u8 *fh_params;

	const u8 *fh_params;

	u8 *ds_params;

	const u8 *ds_params;

	u8 *cf_params;

	const u8 *cf_params;

	struct ieee80211_tim_ie *tim;

	const struct ieee80211_tim_ie *tim;

	u8 *ibss_params;

	const u8 *ibss_params;

	u8 *challenge;

	const u8 *challenge;

	u8 *rsn;

	const u8 *rsn;

	u8 *erp_info;

	const u8 *erp_info;

	u8 *ext_supp_rates;

	const u8 *ext_supp_rates;

	u8 *wmm_info;

	const u8 *wmm_info;

	u8 *wmm_param;

	const u8 *wmm_param;

	struct ieee80211_ht_cap *ht_cap_elem;

	const struct ieee80211_ht_cap *ht_cap_elem;

	struct ieee80211_ht_operation *ht_operation;

	const struct ieee80211_ht_operation *ht_operation;

	struct ieee80211_vht_cap *vht_cap_elem;

	const struct ieee80211_vht_cap *vht_cap_elem;

	struct ieee80211_vht_operation *vht_operation;

	const struct ieee80211_vht_operation *vht_operation;

	struct ieee80211_meshconf_ie *mesh_config;

	const struct ieee80211_meshconf_ie *mesh_config;

	u8 *mesh_id;

	const u8 *mesh_id;

	u8 *peering;

	const u8 *peering;

	__le16 *awake_window;

	const __le16 *awake_window;

	u8 *preq;

	const u8 *preq;

	u8 *prep;

	const u8 *prep;

	u8 *perr;

	const u8 *perr;

	struct ieee80211_rann_ie *rann;

	const struct ieee80211_rann_ie *rann;

	struct ieee80211_channel_sw_ie *ch_switch_ie;

	const struct ieee80211_channel_sw_ie *ch_switch_ie;

	u8 *country_elem;

	const u8 *country_elem;

	u8 *pwr_constr_elem;

	const u8 *pwr_constr_elem;

	u8 *quiet_elem;	/* first quite element */

	const u8 *quiet_elem;	/* first quite element */

	u8 *timeout_int;

	const u8 *timeout_int;

	u8 *opmode_notif;

	const u8 *opmode_notif;





	/* length of them, respectively */

	/* length of them, respectively */

	u8 ssid_len;

	u8 ssid_len;
@@ -1276,10 +1276,10 @@ void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata); 
int ieee80211_max_network_latency(struct notifier_block *nb,

int ieee80211_max_network_latency(struct notifier_block *nb,

				  unsigned long data, void *dummy);

				  unsigned long data, void *dummy);

int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);

int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);

void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,

void

				      struct ieee80211_channel_sw_ie *sw_elem,

ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,

				      struct ieee80211_bss *bss,

				 const struct ieee80211_channel_sw_ie *sw_elem,

				      u64 timestamp);

				 struct ieee80211_bss *bss, u64 timestamp);

void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);

void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);

void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);

void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);

void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);

void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
@@ -1387,7 +1387,7 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, 
				     struct ieee80211_sta_ht_cap *ht_cap);

				     struct ieee80211_sta_ht_cap *ht_cap);

bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,

bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,

				       struct ieee80211_supported_band *sband,

				       struct ieee80211_supported_band *sband,

				       struct ieee80211_ht_cap *ht_cap_ie,

				       const struct ieee80211_ht_cap *ht_cap_ie,

				       struct sta_info *sta);

				       struct sta_info *sta);

void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,

void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,

			  const u8 *da, u16 tid,

			  const u8 *da, u16 tid,
@@ -1428,9 +1428,10 @@ void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid); 
u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);

u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);





/* VHT */

/* VHT */

void ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,

void

ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,

				    struct ieee80211_supported_band *sband,

				    struct ieee80211_supported_band *sband,

					 struct ieee80211_vht_cap *vht_cap_ie,

				    const struct ieee80211_vht_cap *vht_cap_ie,

				    struct sta_info *sta);

				    struct sta_info *sta);

enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);

enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);

void ieee80211_sta_set_rx_nss(struct sta_info *sta);

void ieee80211_sta_set_rx_nss(struct sta_info *sta);
@@ -1555,7 +1556,7 @@ static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local, 




void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,

void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,

			 u16 transaction, u16 auth_alg, u16 status,

			 u16 transaction, u16 auth_alg, u16 status,

			 u8 *extra, size_t extra_len, const u8 *bssid,

			 const u8 *extra, size_t extra_len, const u8 *bssid,

			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,

			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,

			 u32 tx_flags);

			 u32 tx_flags);

void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,

void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
@@ -1606,7 +1607,7 @@ int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 




/* channel management */

/* channel management */

void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,

void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,

				  struct ieee80211_ht_operation *ht_oper,

				  const struct ieee80211_ht_operation *ht_oper,

				  struct cfg80211_chan_def *chandef);

				  struct cfg80211_chan_def *chandef);





int __must_check

int __must_check

net/mac80211/mesh.h

+6 −5
Original line number Original line Diff line number Diff line
@@ -265,7 +265,7 @@ int mesh_nexthop_lookup(struct sk_buff *skb, 
int mesh_nexthop_resolve(struct sk_buff *skb,

int mesh_nexthop_resolve(struct sk_buff *skb,

			 struct ieee80211_sub_if_data *sdata);

			 struct ieee80211_sub_if_data *sdata);

void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);

void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);

struct mesh_path *mesh_path_lookup(u8 *dst,

struct mesh_path *mesh_path_lookup(const u8 *dst,

				   struct ieee80211_sub_if_data *sdata);

				   struct ieee80211_sub_if_data *sdata);

struct mesh_path *mpp_path_lookup(u8 *dst,

struct mesh_path *mpp_path_lookup(u8 *dst,

				  struct ieee80211_sub_if_data *sdata);

				  struct ieee80211_sub_if_data *sdata);
@@ -276,7 +276,7 @@ void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop); 
void mesh_path_expire(struct ieee80211_sub_if_data *sdata);

void mesh_path_expire(struct ieee80211_sub_if_data *sdata);

void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,

void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,

		struct ieee80211_mgmt *mgmt, size_t len);

		struct ieee80211_mgmt *mgmt, size_t len);

int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata);

int mesh_path_add(const u8 *dst, struct ieee80211_sub_if_data *sdata);





int mesh_path_add_gate(struct mesh_path *mpath);

int mesh_path_add_gate(struct mesh_path *mpath);

int mesh_path_send_to_gates(struct mesh_path *mpath);

int mesh_path_send_to_gates(struct mesh_path *mpath);
@@ -301,8 +301,9 @@ void mesh_sta_cleanup(struct sta_info *sta); 
void mesh_mpath_table_grow(void);

void mesh_mpath_table_grow(void);

void mesh_mpp_table_grow(void);

void mesh_mpp_table_grow(void);

/* Mesh paths */

/* Mesh paths */

int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, __le16 target_rcode,

int mesh_path_error_tx(u8 ttl, const u8 *target, __le32 target_sn,

		       const u8 *ra, struct ieee80211_sub_if_data *sdata);

		       __le16 target_rcode, const u8 *ra,

		       struct ieee80211_sub_if_data *sdata);

void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);

void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);

void mesh_path_flush_pending(struct mesh_path *mpath);

void mesh_path_flush_pending(struct mesh_path *mpath);

void mesh_path_tx_pending(struct mesh_path *mpath);

void mesh_path_tx_pending(struct mesh_path *mpath);

net/mac80211/mesh_hwmp.c

+23 −19
Original line number Original line Diff line number Diff line
@@ -30,14 +30,14 @@ 




static void mesh_queue_preq(struct mesh_path *, u8);

static void mesh_queue_preq(struct mesh_path *, u8);





static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)

static inline u32 u32_field_get(const u8 *preq_elem, int offset, bool ae)

{

{

	if (ae)

	if (ae)

		offset += 6;

		offset += 6;

	return get_unaligned_le32(preq_elem + offset);

	return get_unaligned_le32(preq_elem + offset);

}

}





static inline u32 u16_field_get(u8 *preq_elem, int offset, bool ae)

static inline u32 u16_field_get(const u8 *preq_elem, int offset, bool ae)

{

{

	if (ae)

	if (ae)

		offset += 6;

		offset += 6;
@@ -102,9 +102,12 @@ enum mpath_frame_type { 
static const u8 broadcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

static const u8 broadcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};





static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,

static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,

		u8 *orig_addr, __le32 orig_sn, u8 target_flags, u8 *target,

				  const u8 *orig_addr, __le32 orig_sn,

		__le32 target_sn, const u8 *da, u8 hop_count, u8 ttl,

				  u8 target_flags, const u8 *target,

		__le32 lifetime, __le32 metric, __le32 preq_id,

				  __le32 target_sn, const u8 *da,

				  u8 hop_count, u8 ttl,

				  __le32 lifetime, __le32 metric,

				  __le32 preq_id,

				  struct ieee80211_sub_if_data *sdata)

				  struct ieee80211_sub_if_data *sdata)

{

{

	struct ieee80211_local *local = sdata->local;

	struct ieee80211_local *local = sdata->local;
@@ -235,7 +238,7 @@ static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata, 
 * also acquires in the TX path.  To avoid a deadlock we don't transmit the

 * also acquires in the TX path.  To avoid a deadlock we don't transmit the

 * frame directly but add it to the pending queue instead.

 * frame directly but add it to the pending queue instead.

 */

 */

int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,

int mesh_path_error_tx(u8 ttl, const u8 *target, __le32 target_sn,

		       __le16 target_rcode, const u8 *ra,

		       __le16 target_rcode, const u8 *ra,

		       struct ieee80211_sub_if_data *sdata)

		       struct ieee80211_sub_if_data *sdata)

{

{
@@ -370,13 +373,13 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local, 
 */

 */

static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,

static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,

			       struct ieee80211_mgmt *mgmt,

			       struct ieee80211_mgmt *mgmt,

			    u8 *hwmp_ie, enum mpath_frame_type action)

			       const u8 *hwmp_ie, enum mpath_frame_type action)

{

{

	struct ieee80211_local *local = sdata->local;

	struct ieee80211_local *local = sdata->local;

	struct mesh_path *mpath;

	struct mesh_path *mpath;

	struct sta_info *sta;

	struct sta_info *sta;

	bool fresh_info;

	bool fresh_info;

	u8 *orig_addr, *ta;

	const u8 *orig_addr, *ta;

	u32 orig_sn, orig_metric;

	u32 orig_sn, orig_metric;

	unsigned long orig_lifetime, exp_time;

	unsigned long orig_lifetime, exp_time;

	u32 last_hop_metric, new_metric;

	u32 last_hop_metric, new_metric;
@@ -511,11 +514,11 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata, 




static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,

static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,

				    struct ieee80211_mgmt *mgmt,

				    struct ieee80211_mgmt *mgmt,

				    u8 *preq_elem, u32 metric)

				    const u8 *preq_elem, u32 metric)

{

{

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct mesh_path *mpath = NULL;

	struct mesh_path *mpath = NULL;

	u8 *target_addr, *orig_addr;

	const u8 *target_addr, *orig_addr;

	const u8 *da;

	const u8 *da;

	u8 target_flags, ttl, flags;

	u8 target_flags, ttl, flags;

	u32 orig_sn, target_sn, lifetime, orig_metric;

	u32 orig_sn, target_sn, lifetime, orig_metric;
@@ -648,11 +651,11 @@ next_hop_deref_protected(struct mesh_path *mpath) 




static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,

static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,

				    struct ieee80211_mgmt *mgmt,

				    struct ieee80211_mgmt *mgmt,

				    u8 *prep_elem, u32 metric)

				    const u8 *prep_elem, u32 metric)

{

{

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct mesh_path *mpath;

	struct mesh_path *mpath;

	u8 *target_addr, *orig_addr;

	const u8 *target_addr, *orig_addr;

	u8 ttl, hopcount, flags;

	u8 ttl, hopcount, flags;

	u8 next_hop[ETH_ALEN];

	u8 next_hop[ETH_ALEN];

	u32 target_sn, orig_sn, lifetime;

	u32 target_sn, orig_sn, lifetime;
@@ -711,12 +714,13 @@ fail: 
}

}





static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,

static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,

			     struct ieee80211_mgmt *mgmt, u8 *perr_elem)

				    struct ieee80211_mgmt *mgmt,

				    const u8 *perr_elem)

{

{

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct mesh_path *mpath;

	struct mesh_path *mpath;

	u8 ttl;

	u8 ttl;

	u8 *ta, *target_addr;

	const u8 *ta, *target_addr;

	u32 target_sn;

	u32 target_sn;

	u16 target_rcode;

	u16 target_rcode;
@@ -759,14 +763,14 @@ endperr: 




static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,

static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,

				    struct ieee80211_mgmt *mgmt,

				    struct ieee80211_mgmt *mgmt,

				struct ieee80211_rann_ie *rann)

				    const struct ieee80211_rann_ie *rann)

{

{

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

	struct ieee80211_local *local = sdata->local;

	struct ieee80211_local *local = sdata->local;

	struct sta_info *sta;

	struct sta_info *sta;

	struct mesh_path *mpath;

	struct mesh_path *mpath;

	u8 ttl, flags, hopcount;

	u8 ttl, flags, hopcount;

	u8 *orig_addr;

	const u8 *orig_addr;

	u32 orig_sn, metric, metric_txsta, interval;

	u32 orig_sn, metric, metric_txsta, interval;

	bool root_is_gate;

	bool root_is_gate;