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Modify ieee80211_saveie and ieee80211_saveath(ewww) to take a NULL source parameter, and to cleanup in this case.

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On reception of an Associatiion request, always save IEs correctly (i.e., cleanup up any no longer valid IEs in the case that no new, valid IE is received).

Ticket: http://madwifi.org/ticket/1188
Original Patch: Signed-Off-By: Bas


git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@2847 0192ed92-7a03-0410-a25b-9323aeb14dbd
This commit is contained in:
mentor 2007-11-13 17:45:58 +00:00
parent 73cbb16ebe
commit 3fbb1d543d
1 changed files with 33 additions and 76 deletions
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93
net80211/ieee80211_input.c
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@ -2059,19 +2059,19 @@ ieee80211_parse_rsn(struct ieee80211vap *vap, u_int8_t *frm,
return 0;
}
/* Record information element for later use. */
void
ieee80211_saveie(u_int8_t **iep, const u_int8_t *ie)
{
u_int ielen = ie[1] + 2;
/*
* Record information element for later use.
*/
if (*iep == NULL || (*iep)[1] != ie[1]) {
if ((*iep == NULL) || (ie == NULL) || ((*iep)[1] != ie[1])) {
if (*iep != NULL)
FREE(*iep, M_DEVBUF);
*iep = NULL;
if (ie != NULL)
MALLOC(*iep, void*, ielen, M_DEVBUF, M_NOWAIT);
}
if (*iep != NULL)
if ((*iep != NULL) && (ie != NULL))
memcpy(*iep, ie, ielen);
}
EXPORT_SYMBOL(ieee80211_saveie);
@ -2248,10 +2248,15 @@ ieee80211_saveath(struct ieee80211_node *ni, u_int8_t *ie)
const struct ieee80211_ie_athAdvCap *athIe =
(const struct ieee80211_ie_athAdvCap *) ie;
ieee80211_saveie(&ni->ni_ath_ie, ie);
if (athIe != NULL) {
ni->ni_ath_flags = athIe->athAdvCap_capability;
if (ni->ni_ath_flags & IEEE80211_ATHC_COMP)
ni->ni_ath_defkeyindex = LE_READ_2(&athIe->athAdvCap_defKeyIndex);
ieee80211_saveie(&ni->ni_ath_ie, ie);
} else {
ni->ni_ath_flags = 0;
ni->ni_ath_defkeyindex = IEEE80211_INVAL_DEFKEY;
}
}
struct ieee80211_channel *
@ -3188,10 +3193,8 @@ ieee80211_recv_mgmt(struct ieee80211_node *ni, struct sk_buff *skb,
ether_sprintf(wh->i_addr2));
break;
case IEEE80211_ELEMID_VENDOR:
/* don't override RSN element
* XXX: actually the driver should report both WPA versions,
* so wpa_supplicant can choose and also detect downgrade attacks
*/
/* NB: Provide all IEs for wpa_supplicant, so
* it can handle downgrade attacks, etc. */
if (iswpaoui(frm) && !wpa) {
if (vap->iv_flags & IEEE80211_F_WPA1)
wpa = frm;
@ -3210,6 +3213,7 @@ ieee80211_recv_mgmt(struct ieee80211_node *ni, struct sk_buff *skb,
}
if (frm > efrm)
return;
IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE);
IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN);
IEEE80211_VERIFY_SSID(vap->iv_bss, ssid);
@ -3242,13 +3246,9 @@ ieee80211_recv_mgmt(struct ieee80211_node *ni, struct sk_buff *skb,
}
if (rsn != NULL) {
/*
* Parse WPA information element. Note that
* we initialize the param block from the node
* state so that information in the IE overrides
* our defaults. The resulting parameters are
* installed below after the association is assured.
*/
/* Initialise values to node defaults, which are then
* overwritten by values in the IE. These are
* installed once association is complete. */
rsn_parm = ni->ni_rsn;
if (rsn[0] != IEEE80211_ELEMID_RSN)
reason = ieee80211_parse_wpa(vap, rsn, &rsn_parm, wh);
@ -3276,7 +3276,7 @@ ieee80211_recv_mgmt(struct ieee80211_node *ni, struct sk_buff *skb,
FREE(ni->ni_challenge, M_DEVBUF);
ni->ni_challenge = NULL;
}
/* 802.11 spec says to ignore station's privacy bit */
/* 802.11 spec. says to ignore station's privacy bit */
if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
"deny %s request, capability mismatch 0x%x",
@ -3332,62 +3332,19 @@ ieee80211_recv_mgmt(struct ieee80211_node *ni, struct sk_buff *skb,
ni->ni_chan = ic->ic_curchan;
ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
ni->ni_fhindex = vap->iv_bss->ni_fhindex;
if (wpa != NULL) {
/*
* Record WPA/RSN parameters for station, mark
* node as using WPA and record information element
* for applications that require it.
*/
/* WPA */
ieee80211_saveie(&ni->ni_wpa_ie, wpa);
} else if (ni->ni_wpa_ie != NULL) {
/*
* Flush any state from a previous association.
*/
FREE(ni->ni_wpa_ie, M_DEVBUF);
ni->ni_wpa_ie = NULL;
}
if (rsn != NULL) {
/*
* Record WPA/RSN parameters for station, mark
* node as using WPA and record information element
* for applications that require it.
*/
/* RSN */
ni->ni_rsn = rsn_parm;
ieee80211_saveie(&ni->ni_rsn_ie, rsn);
} else if (ni->ni_rsn_ie != NULL) {
/*
* Flush any state from a previous association.
*/
FREE(ni->ni_rsn_ie, M_DEVBUF);
ni->ni_rsn_ie = NULL;
}
if (wme != NULL) {
/*
* Record WME parameters for station, mark node
* as capable of QoS and record information
* element for applications that require it.
*/
/* WME - including QoS flag */
ieee80211_saveie(&ni->ni_wme_ie, wme);
if (ieee80211_parse_wmeie(wme, wh, ni) > 0)
ni->ni_flags |= IEEE80211_NODE_QOS;
} else if (ni->ni_wme_ie != NULL) {
/*
* Flush any state from a previous association.
*/
FREE(ni->ni_wme_ie, M_DEVBUF);
ni->ni_wme_ie = NULL;
ni->ni_flags &= ~IEEE80211_NODE_QOS;
}
if (ath != NULL)
if ((wme != NULL) && (ieee80211_parse_wmeie(wme, wh, ni) > 0))
ni->ni_flags |= IEEE80211_NODE_QOS;
ieee80211_saveath(ni, ath);
else if (ni->ni_ath_ie != NULL) {
/*
* Flush any state from a previous association.
*/
FREE(ni->ni_ath_ie, M_DEVBUF);
ni->ni_ath_ie = NULL;
ni->ni_ath_flags = 0;
}
/* Send TGf L2UF frame on behalf of newly associated station */
ieee80211_deliver_l2uf(ni);