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cfg80211: move IE split utilities here from mac80211 

As the next patch will require the IE splitting utility functions
in cfg80211, move them there from mac80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-03-31 15:36:22 +02:00
parent ba8c3d6f16
commit 29464ccc78
5 changed files with 99 additions and 72 deletions
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58
include/net/cfg80211.h
View File

@ -5000,6 +5000,64 @@ int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
enum ieee80211_p2p_attr_id attr,
u8 *buf, unsigned int bufsize);
/**
* ieee80211_ie_split_ric - split an IE buffer according to ordering (with RIC)
* @ies: the IE buffer
* @ielen: the length of the IE buffer
* @ids: an array with element IDs that are allowed before
* the split
* @n_ids: the size of the element ID array
* @after_ric: array IE types that come after the RIC element
* @n_after_ric: size of the @after_ric array
* @offset: offset where to start splitting in the buffer
*
* This function splits an IE buffer by updating the @offset
* variable to point to the location where the buffer should be
* split.
*
* It assumes that the given IE buffer is well-formed, this
* has to be guaranteed by the caller!
*
* It also assumes that the IEs in the buffer are ordered
* correctly, if not the result of using this function will not
* be ordered correctly either, i.e. it does no reordering.
*
* The function returns the offset where the next part of the
* buffer starts, which may be @ielen if the entire (remainder)
* of the buffer should be used.
*/
size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids,
const u8 *after_ric, int n_after_ric,
size_t offset);
/**
* ieee80211_ie_split - split an IE buffer according to ordering
* @ies: the IE buffer
* @ielen: the length of the IE buffer
* @ids: an array with element IDs that are allowed before
* the split
* @n_ids: the size of the element ID array
* @offset: offset where to start splitting in the buffer
*
* This function splits an IE buffer by updating the @offset
* variable to point to the location where the buffer should be
* split.
*
* It assumes that the given IE buffer is well-formed, this
* has to be guaranteed by the caller!
*
* It also assumes that the IEs in the buffer are ordered
* correctly, if not the result of using this function will not
* be ordered correctly either, i.e. it does no reordering.
*
* The function returns the offset where the next part of the
* buffer starts, which may be @ielen if the entire (remainder)
* of the buffer should be used.
*/
size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids, size_t offset);
/**
* cfg80211_report_wowlan_wakeup - report wakeup from WoWLAN
* @wdev: the wireless device reporting the wakeup

28
include/net/mac80211.h
View File

@ -5379,34 +5379,6 @@ int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid);
*/
void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid);
/**
* ieee80211_ie_split - split an IE buffer according to ordering
*
* @ies: the IE buffer
* @ielen: the length of the IE buffer
* @ids: an array with element IDs that are allowed before
* the split
* @n_ids: the size of the element ID array
* @offset: offset where to start splitting in the buffer
*
* This function splits an IE buffer by updating the @offset
* variable to point to the location where the buffer should be
* split.
*
* It assumes that the given IE buffer is well-formed, this
* has to be guaranteed by the caller!
*
* It also assumes that the IEs in the buffer are ordered
* correctly, if not the result of using this function will not
* be ordered correctly either, i.e. it does no reordering.
*
* The function returns the offset where the next part of the
* buffer starts, which may be @ielen if the entire (remainder)
* of the buffer should be used.
*/
size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids, size_t offset);
/**
* ieee80211_tx_dequeue - dequeue a packet from a software tx queue
*

4
net/mac80211/ieee80211_i.h
View File

@ -1965,10 +1965,6 @@ int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids,
const u8 *after_ric, int n_after_ric,
size_t offset);
size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
u16 cap);

40
net/mac80211/util.c
View File

@ -2194,46 +2194,6 @@ void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
mutex_unlock(&local->chanctx_mtx);
}
static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
{
int i;
for (i = 0; i < n_ids; i++)
if (ids[i] == id)
return true;
return false;
}
size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids,
const u8 *after_ric, int n_after_ric,
size_t offset)
{
size_t pos = offset;
while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
pos += 2 + ies[pos + 1];
while (pos < ielen &&
!ieee80211_id_in_list(after_ric, n_after_ric,
ies[pos]))
pos += 2 + ies[pos + 1];
} else {
pos += 2 + ies[pos + 1];
}
}
return pos;
}
size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids, size_t offset)
{
return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
}
EXPORT_SYMBOL(ieee80211_ie_split);
size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
{
size_t pos = offset;

41
net/wireless/util.c
View File

@ -1290,6 +1290,47 @@ int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
}
EXPORT_SYMBOL(cfg80211_get_p2p_attr);
static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
{
int i;
for (i = 0; i < n_ids; i++)
if (ids[i] == id)
return true;
return false;
}
size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids,
const u8 *after_ric, int n_after_ric,
size_t offset)
{
size_t pos = offset;
while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
pos += 2 + ies[pos + 1];
while (pos < ielen &&
!ieee80211_id_in_list(after_ric, n_after_ric,
ies[pos]))
pos += 2 + ies[pos + 1];
} else {
pos += 2 + ies[pos + 1];
}
}
return pos;
}
EXPORT_SYMBOL(ieee80211_ie_split_ric);
size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
const u8 *ids, int n_ids, size_t offset)
{
return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
}
EXPORT_SYMBOL(ieee80211_ie_split);
bool ieee80211_operating_class_to_band(u8 operating_class,
enum ieee80211_band *band)
{