2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 * Purpose: Handles the Basic Service Set & Node Database functions
25 * WPA_ParseRSN - Parse RSN IE.
45 /*--------------------- Static Variables --------------------------*/
46 static const unsigned char abyOUI00
[4] = { 0x00, 0x50, 0xf2, 0x00 };
47 static const unsigned char abyOUI01
[4] = { 0x00, 0x50, 0xf2, 0x01 };
48 static const unsigned char abyOUI02
[4] = { 0x00, 0x50, 0xf2, 0x02 };
49 static const unsigned char abyOUI03
[4] = { 0x00, 0x50, 0xf2, 0x03 };
50 static const unsigned char abyOUI04
[4] = { 0x00, 0x50, 0xf2, 0x04 };
51 static const unsigned char abyOUI05
[4] = { 0x00, 0x50, 0xf2, 0x05 };
56 * Clear RSN information in BSSList.
60 * pBSSList - BSS list.
75 pBSSList
->byGKType
= WPA_TKIP
;
76 for (ii
= 0; ii
< 4; ii
++)
77 pBSSList
->abyPKType
[ii
] = WPA_TKIP
;
78 pBSSList
->wPKCount
= 0;
79 for (ii
= 0; ii
< 4; ii
++)
80 pBSSList
->abyAuthType
[ii
] = WPA_AUTH_IEEE802_1X
;
81 pBSSList
->wAuthCount
= 0;
82 pBSSList
->byDefaultK_as_PK
= 0;
83 pBSSList
->byReplayIdx
= 0;
84 pBSSList
->sRSNCapObj
.bRSNCapExist
= false;
85 pBSSList
->sRSNCapObj
.wRSNCap
= 0;
86 pBSSList
->bWPAValid
= false;
96 * pBSSList - BSS list.
97 * pRSN - Pointer to the RSN IE.
101 * Return Value: none.
107 PWLAN_IE_RSN_EXT pRSN
110 PWLAN_IE_RSN_AUTH pIE_RSN_Auth
= NULL
;
112 unsigned char *pbyCaps
;
114 WPA_ClearRSN(pBSSList
);
116 pr_debug("WPA_ParseRSN: [%d]\n", pRSN
->len
);
118 // information element header makes sense
119 if ((pRSN
->len
>= 6) // oui1(4)+ver(2)
120 && (pRSN
->byElementID
== WLAN_EID_RSN_WPA
) && !memcmp(pRSN
->abyOUI
, abyOUI01
, 4)
121 && (pRSN
->wVersion
== 1)) {
122 pr_debug("Legal RSN\n");
123 // update each variable if pRSN is long enough to contain the variable
124 if (pRSN
->len
>= 10) {
125 //OUI1(4)+ver(2)+GKSuite(4)
126 if (!memcmp(pRSN
->abyMulticast
, abyOUI01
, 4))
127 pBSSList
->byGKType
= WPA_WEP40
;
128 else if (!memcmp(pRSN
->abyMulticast
, abyOUI02
, 4))
129 pBSSList
->byGKType
= WPA_TKIP
;
130 else if (!memcmp(pRSN
->abyMulticast
, abyOUI03
, 4))
131 pBSSList
->byGKType
= WPA_AESWRAP
;
132 else if (!memcmp(pRSN
->abyMulticast
, abyOUI04
, 4))
133 pBSSList
->byGKType
= WPA_AESCCMP
;
134 else if (!memcmp(pRSN
->abyMulticast
, abyOUI05
, 4))
135 pBSSList
->byGKType
= WPA_WEP104
;
137 // any vendor checks here
138 pBSSList
->byGKType
= WPA_NONE
;
140 pr_debug("byGKType: %x\n", pBSSList
->byGKType
);
143 if (pRSN
->len
>= 12) {
144 //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)
146 pr_debug("wPKCount: %d, sizeof(pBSSList->abyPKType): %zu\n",
147 pRSN
->wPKCount
, sizeof(pBSSList
->abyPKType
));
148 for (i
= 0; (i
< pRSN
->wPKCount
) && (j
< ARRAY_SIZE(pBSSList
->abyPKType
)); i
++) {
149 if (pRSN
->len
>= 12+i
*4+4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*i)
150 if (!memcmp(pRSN
->PKSList
[i
].abyOUI
, abyOUI00
, 4))
151 pBSSList
->abyPKType
[j
++] = WPA_NONE
;
152 else if (!memcmp(pRSN
->PKSList
[i
].abyOUI
, abyOUI02
, 4))
153 pBSSList
->abyPKType
[j
++] = WPA_TKIP
;
154 else if (!memcmp(pRSN
->PKSList
[i
].abyOUI
, abyOUI03
, 4))
155 pBSSList
->abyPKType
[j
++] = WPA_AESWRAP
;
156 else if (!memcmp(pRSN
->PKSList
[i
].abyOUI
, abyOUI04
, 4))
157 pBSSList
->abyPKType
[j
++] = WPA_AESCCMP
;
159 // any vendor checks here
164 pBSSList
->wPKCount
= (unsigned short)j
;
165 pr_debug("wPKCount: %d\n", pBSSList
->wPKCount
);
169 pr_debug("m: %d\n", m
);
170 pr_debug("14+m*4: %d\n", 14+m
*4);
172 if (pRSN
->len
>= 14+m
*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)
173 // overlay IE_RSN_Auth structure into correct place
174 pIE_RSN_Auth
= (PWLAN_IE_RSN_AUTH
) pRSN
->PKSList
[m
].abyOUI
;
176 pr_debug("wAuthCount: %d, sizeof(pBSSList->abyAuthType): %zu\n",
177 pIE_RSN_Auth
->wAuthCount
,
178 sizeof(pBSSList
->abyAuthType
));
179 for (i
= 0; (i
< pIE_RSN_Auth
->wAuthCount
) && (j
< ARRAY_SIZE(pBSSList
->abyAuthType
)); i
++) {
180 if (pRSN
->len
>= 14+4+(m
+i
)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i)
181 if (!memcmp(pIE_RSN_Auth
->AuthKSList
[i
].abyOUI
, abyOUI01
, 4))
182 pBSSList
->abyAuthType
[j
++] = WPA_AUTH_IEEE802_1X
;
183 else if (!memcmp(pIE_RSN_Auth
->AuthKSList
[i
].abyOUI
, abyOUI02
, 4))
184 pBSSList
->abyAuthType
[j
++] = WPA_AUTH_PSK
;
186 // any vendor checks here
193 pBSSList
->wAuthCount
= (unsigned short)j
;
194 pr_debug("wAuthCount: %d\n", pBSSList
->wAuthCount
);
197 if (pIE_RSN_Auth
!= NULL
) {
198 n
= pIE_RSN_Auth
->wAuthCount
;
200 pr_debug("n: %d\n", n
);
201 pr_debug("14+4+(m+n)*4: %d\n", 14+4+(m
+n
)*4);
203 if (pRSN
->len
+2 >= 14+4+(m
+n
)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*n)+Cap(2)
204 pbyCaps
= (unsigned char *)pIE_RSN_Auth
->AuthKSList
[n
].abyOUI
;
205 pBSSList
->byDefaultK_as_PK
= (*pbyCaps
) & WPA_GROUPFLAG
;
206 pBSSList
->byReplayIdx
= 2 << ((*pbyCaps
>> WPA_REPLAYBITSSHIFT
) & WPA_REPLAYBITS
);
207 pBSSList
->sRSNCapObj
.bRSNCapExist
= true;
208 pBSSList
->sRSNCapObj
.wRSNCap
= *(unsigned short *)pbyCaps
;
211 pBSSList
->bWPAValid
= true;
218 * Search RSN information in BSSList.
222 * byCmd - Search type
223 * byEncrypt- Encrypt Type
224 * pBSSList - BSS list
228 * Return Value: none.
234 unsigned char byEncrypt
,
239 unsigned char byPKType
= WPA_NONE
;
241 if (!pBSSList
->bWPAValid
)
247 if (byEncrypt
!= pBSSList
->byGKType
)
250 if (pBSSList
->wPKCount
> 0) {
251 for (ii
= 0; ii
< pBSSList
->wPKCount
; ii
++) {
252 if (pBSSList
->abyPKType
[ii
] == WPA_AESCCMP
)
253 byPKType
= WPA_AESCCMP
;
254 else if ((pBSSList
->abyPKType
[ii
] == WPA_TKIP
) && (byPKType
!= WPA_AESCCMP
))
256 else if ((pBSSList
->abyPKType
[ii
] == WPA_WEP40
) && (byPKType
!= WPA_AESCCMP
) && (byPKType
!= WPA_TKIP
))
257 byPKType
= WPA_WEP40
;
258 else if ((pBSSList
->abyPKType
[ii
] == WPA_WEP104
) && (byPKType
!= WPA_AESCCMP
) && (byPKType
!= WPA_TKIP
))
259 byPKType
= WPA_WEP104
;
261 if (byEncrypt
!= byPKType
)
275 * Check if RSN IE makes sense.
279 * pRSN - Pointer to the RSN IE.
283 * Return Value: none.
288 PWLAN_IE_RSN_EXT pRSN
294 if ((pRSN
->len
>= 6) && // oui1(4)+ver(2)
295 (pRSN
->byElementID
== WLAN_EID_RSN_WPA
) && !memcmp(pRSN
->abyOUI
, abyOUI01
, 4) &&
296 (pRSN
->wVersion
== 1)) {