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| author | Andriy Tkachuk <andrit@ukr.net> | 2010-02-02 16:33:53 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-02-02 16:03:38 -0500 |
| commit | 299af9d3db0fd3a4994e5e66717ecd276bdd60da (patch) | |
| tree | d0bdc0bc294e8e202d58513b691ad858b89865c0 /net/wireless/lib80211_crypt_tkip.c | |
| parent | d0833a6a2dbc169aba3abcc0904e5aea348bb4d3 (diff) | |
| download | linux-299af9d3db0fd3a4994e5e66717ecd276bdd60da.tar.gz linux-299af9d3db0fd3a4994e5e66717ecd276bdd60da.tar.bz2 linux-299af9d3db0fd3a4994e5e66717ecd276bdd60da.zip | |
lib80211: Introduce TKIP_HDR_LEN define for code clarity
Introduce TKIP_HDR_LEN define for code clarity (in the same way as
CCMP_HDR_LEN).
Also odd len variable (not used) dropped from lib80211_tkip_hdr().
Signed-off-by: Andriy V. Tkachuk <andrit@ukr.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/lib80211_crypt_tkip.c')
| -rw-r--r-- | net/wireless/lib80211_crypt_tkip.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/net/wireless/lib80211_crypt_tkip.c b/net/wireless/lib80211_crypt_tkip.c index c6a3cae1f85e..8cbdb32ff316 100644 --- a/net/wireless/lib80211_crypt_tkip.c +++ b/net/wireless/lib80211_crypt_tkip.c @@ -36,6 +36,8 @@ MODULE_AUTHOR("Jouni Malinen"); MODULE_DESCRIPTION("lib80211 crypt: TKIP"); MODULE_LICENSE("GPL"); +#define TKIP_HDR_LEN 8 + struct lib80211_tkip_data { #define TKIP_KEY_LEN 32 u8 key[TKIP_KEY_LEN]; @@ -314,13 +316,12 @@ static int lib80211_tkip_hdr(struct sk_buff *skb, int hdr_len, u8 * rc4key, int keylen, void *priv) { struct lib80211_tkip_data *tkey = priv; - int len; u8 *pos; struct ieee80211_hdr *hdr; hdr = (struct ieee80211_hdr *)skb->data; - if (skb_headroom(skb) < 8 || skb->len < hdr_len) + if (skb_headroom(skb) < TKIP_HDR_LEN || skb->len < hdr_len) return -1; if (rc4key == NULL || keylen < 16) @@ -333,9 +334,8 @@ static int lib80211_tkip_hdr(struct sk_buff *skb, int hdr_len, } tkip_mixing_phase2(rc4key, tkey->key, tkey->tx_ttak, tkey->tx_iv16); - len = skb->len - hdr_len; - pos = skb_push(skb, 8); - memmove(pos, pos + 8, hdr_len); + pos = skb_push(skb, TKIP_HDR_LEN); + memmove(pos, pos + TKIP_HDR_LEN, hdr_len); pos += hdr_len; *pos++ = *rc4key; @@ -353,7 +353,7 @@ static int lib80211_tkip_hdr(struct sk_buff *skb, int hdr_len, tkey->tx_iv32++; } - return 8; + return TKIP_HDR_LEN; } static int lib80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv) @@ -433,7 +433,7 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) return -1; } - if (skb->len < hdr_len + 8 + 4) + if (skb->len < hdr_len + TKIP_HDR_LEN + 4) return -1; pos = skb->data + hdr_len; @@ -461,7 +461,7 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) } iv16 = (pos[0] << 8) | pos[2]; iv32 = pos[4] | (pos[5] << 8) | (pos[6] << 16) | (pos[7] << 24); - pos += 8; + pos += TKIP_HDR_LEN; if (tkip_replay_check(iv32, iv16, tkey->rx_iv32, tkey->rx_iv16)) { #ifdef CONFIG_LIB80211_DEBUG @@ -522,8 +522,8 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) tkey->rx_iv16_new = iv16; /* Remove IV and ICV */ - memmove(skb->data + 8, skb->data, hdr_len); - skb_pull(skb, 8); + memmove(skb->data + TKIP_HDR_LEN, skb->data, hdr_len); + skb_pull(skb, TKIP_HDR_LEN); skb_trim(skb, skb->len - 4); return keyidx; |