projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 635d2b00 GKH |
1 | /* |
| 2 | * --------------------------------------------------------------------------- | |
| 3 | * FILE: data_tx.c | |
| 4 | * | |
| 5 | * PURPOSE: | |
| 6 | * This file provides functions to send data requests to the UniFi. | |
| 7 | * | |
| 8 | * Copyright (C) 2007-2009 by Cambridge Silicon Radio Ltd. | |
| 9 | * | |
| 10 | * Refer to LICENSE.txt included with this source code for details on | |
| 11 | * the license terms. | |
| 12 | * | |
| 13 | * --------------------------------------------------------------------------- | |
| 14 | */ | |
| 15 | #include "csr_wifi_hip_unifi.h" | |
| 16 | #include "unifi_priv.h" | |
| 17 | ||
| 18 | int | |
| 19 | uf_verify_m4(unifi_priv_t *priv, const unsigned char *packet, unsigned int length) | |
| 20 | { | |
| 7c5745cc GKH |
21 | const unsigned char *p = packet; |
| 22 | u16 keyinfo; | |
| 635d2b00 GKH |
23 | |
| 24 | ||
| dbff11c9 | 25 | if (length < (4 + 5 + 8 + 32 + 16 + 8 + 8 + 16 + 1 + 8)) |
| 7c5745cc | 26 | return 1; |
| 635d2b00 | 27 | |
| 7c5745cc GKH |
28 | p += 8; |
| 29 | keyinfo = p[5] << 8 | p[6]; /* big-endian */ | |
| 30 | if ( | |
| 31 | (p[0] == 1 || p[0] == 2) /* protocol version 802.1X-2001 (WPA) or -2004 (WPA2) */ && | |
| 32 | p[1] == 3 /* EAPOL-Key */ && | |
| 33 | /* don't bother checking p[2] p[3] (hh ll, packet body length) */ | |
| 34 | (p[4] == 254 || p[4] == 2) /* descriptor type P802.1i-D3.0 (WPA) or 802.11i-2004 (WPA2) */ && | |
| 35 | ((keyinfo & 0x0007) == 1 || (keyinfo & 0x0007) == 2) /* key descriptor version */ && | |
| 36 | (keyinfo & ~0x0207U) == 0x0108 && /* key info for 4/4 or 4/2 -- ignore key desc version and sec bit (since varies in WPA 4/4) */ | |
| 37 | (p[4 + 5 + 8 + 32 + 16 + 8 + 8 + 16 + 0] == 0 && /* key data length (2 octets) 0 for 4/4 only */ | |
| 38 | p[4 + 5 + 8 + 32 + 16 + 8 + 8 + 16 + 1] == 0) | |
| 39 | ) { | |
| 0567e1ec | 40 | unifi_trace(priv, UDBG1, "uf_verify_m4: M4 detected\n"); |
| 7c5745cc | 41 | return 0; |
| dbff11c9 | 42 | } else { |
| 7c5745cc GKH |
43 | return 1; |
| 44 | } | |
| 635d2b00 GKH |
45 | } |
| 46 | ||
| 47 | /* | |
| 48 | * --------------------------------------------------------------------------- | |
| 49 | * | |
| 50 | * Data transport signals. | |
| 51 | * | |
| 52 | * --------------------------------------------------------------------------- | |
| 53 | */ | |
| 54 |