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authorDaniel Drake <dsd@gentoo.org>2006-07-11 18:16:34 -0400
committerJohn W. Linville <linville@tuxdriver.com>2006-07-27 14:37:30 -0400
commit345f6b8beb20338a2d792bf5974d01d457abee53 (patch)
tree44169150155e8024f0b98cc709232490b4b35532 /net/ieee80211/softmac
parent8fa9ea18e831417159b7b1a76a944f117252f9ec (diff)
[PATCH] softmac: do shared key auth in workqueue
Johann Uhrmann reported a bcm43xx crash and Michael Buesch tracked it down to a problem with the new shared key auth code (recursive calls into the driver) This patch (effectively Michael's patch with a couple of small modifications) solves the problem by sending the authentication challenge response frame from a workqueue entry. I also removed a lone \n from the bcm43xx messages relating to authentication mode - this small change was previously discussed but not patched in. Signed-off-by: Daniel Drake <dsd@gentoo.org> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/ieee80211/softmac')
-rw-r--r--net/ieee80211/softmac/ieee80211softmac_auth.c28
1 files changed, 22 insertions, 6 deletions
diff --git a/net/ieee80211/softmac/ieee80211softmac_auth.c b/net/ieee80211/softmac/ieee80211softmac_auth.c
index ebc33ca6e692..4cef39e171d0 100644
--- a/net/ieee80211/softmac/ieee80211softmac_auth.c
+++ b/net/ieee80211/softmac/ieee80211softmac_auth.c
@@ -116,6 +116,16 @@ ieee80211softmac_auth_queue(void *data)
116 kfree(auth); 116 kfree(auth);
117} 117}
118 118
119/* Sends a response to an auth challenge (for shared key auth). */
120static void
121ieee80211softmac_auth_challenge_response(void *_aq)
122{
123 struct ieee80211softmac_auth_queue_item *aq = _aq;
124
125 /* Send our response */
126 ieee80211softmac_send_mgt_frame(aq->mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
127}
128
119/* Handle the auth response from the AP 129/* Handle the auth response from the AP
120 * This should be registered with ieee80211 as handle_auth 130 * This should be registered with ieee80211 as handle_auth
121 */ 131 */
@@ -197,24 +207,30 @@ ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth)
197 case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE: 207 case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
198 /* Check to make sure we have a challenge IE */ 208 /* Check to make sure we have a challenge IE */
199 data = (u8 *)auth->info_element; 209 data = (u8 *)auth->info_element;
200 if(*data++ != MFIE_TYPE_CHALLENGE){ 210 if (*data++ != MFIE_TYPE_CHALLENGE) {
201 printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n"); 211 printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n");
202 break; 212 break;
203 } 213 }
204 /* Save the challenge */ 214 /* Save the challenge */
205 spin_lock_irqsave(&mac->lock, flags); 215 spin_lock_irqsave(&mac->lock, flags);
206 net->challenge_len = *data++; 216 net->challenge_len = *data++;
207 if(net->challenge_len > WLAN_AUTH_CHALLENGE_LEN) 217 if (net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
208 net->challenge_len = WLAN_AUTH_CHALLENGE_LEN; 218 net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
209 if(net->challenge != NULL) 219 if (net->challenge != NULL)
210 kfree(net->challenge); 220 kfree(net->challenge);
211 net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC); 221 net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC);
212 memcpy(net->challenge, data, net->challenge_len); 222 memcpy(net->challenge, data, net->challenge_len);
213 aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE; 223 aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE;
214 spin_unlock_irqrestore(&mac->lock, flags);
215 224
216 /* Send our response */ 225 /* We reuse the work struct from the auth request here.
217 ieee80211softmac_send_mgt_frame(mac, aq->net, IEEE80211_STYPE_AUTH, aq->state); 226 * It is safe to do so as each one is per-request, and
227 * at this point (dealing with authentication response)
228 * we have obviously already sent the initial auth
229 * request. */
230 cancel_delayed_work(&aq->work);
231 INIT_WORK(&aq->work, &ieee80211softmac_auth_challenge_response, (void *)aq);
232 schedule_work(&aq->work);
233 spin_unlock_irqrestore(&mac->lock, flags);
218 return 0; 234 return 0;
219 case IEEE80211SOFTMAC_AUTH_SHARED_PASS: 235 case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
220 kfree(net->challenge); 236 kfree(net->challenge);