diff options
| -rw-r--r-- | net/mac80211/tx.c | 234 |
1 files changed, 118 insertions, 116 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 99c3860bc0e2..666158f02a89 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -506,106 +506,6 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) } static ieee80211_tx_result -ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; - size_t hdrlen, per_fragm, num_fragm, payload_len, left; - struct sk_buff **frags, *first, *frag; - int i; - u16 seq; - u8 *pos; - int frag_threshold = tx->local->fragmentation_threshold; - - if (!(tx->flags & IEEE80211_TX_FRAGMENTED)) - return TX_CONTINUE; - - first = tx->skb; - - hdrlen = ieee80211_get_hdrlen(tx->fc); - payload_len = first->len - hdrlen; - per_fragm = frag_threshold - hdrlen - FCS_LEN; - num_fragm = DIV_ROUND_UP(payload_len, per_fragm); - - frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC); - if (!frags) - goto fail; - - hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); - seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ; - pos = first->data + hdrlen + per_fragm; - left = payload_len - per_fragm; - for (i = 0; i < num_fragm - 1; i++) { - struct ieee80211_hdr *fhdr; - size_t copylen; - - if (left <= 0) - goto fail; - - /* reserve enough extra head and tail room for possible - * encryption */ - frag = frags[i] = - dev_alloc_skb(tx->local->tx_headroom + - frag_threshold + - IEEE80211_ENCRYPT_HEADROOM + - IEEE80211_ENCRYPT_TAILROOM); - if (!frag) - goto fail; - /* Make sure that all fragments use the same priority so - * that they end up using the same TX queue */ - frag->priority = first->priority; - skb_reserve(frag, tx->local->tx_headroom + - IEEE80211_ENCRYPT_HEADROOM); - fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen); - memcpy(fhdr, first->data, hdrlen); - if (i == num_fragm - 2) - fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS); - fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG)); - copylen = left > per_fragm ? per_fragm : left; - memcpy(skb_put(frag, copylen), pos, copylen); - - pos += copylen; - left -= copylen; - } - skb_trim(first, hdrlen + per_fragm); - - tx->num_extra_frag = num_fragm - 1; - tx->extra_frag = frags; - - return TX_CONTINUE; - - fail: - printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name); - if (frags) { - for (i = 0; i < num_fragm - 1; i++) - if (frags[i]) - dev_kfree_skb(frags[i]); - kfree(frags); - } - I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment); - return TX_DROP; -} - -static ieee80211_tx_result -ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) -{ - if (!tx->key) - return TX_CONTINUE; - - switch (tx->key->conf.alg) { - case ALG_WEP: - return ieee80211_crypto_wep_encrypt(tx); - case ALG_TKIP: - return ieee80211_crypto_tkip_encrypt(tx); - case ALG_CCMP: - return ieee80211_crypto_ccmp_encrypt(tx); - } - - /* not reached */ - WARN_ON(1); - return TX_DROP; -} - -static ieee80211_tx_result ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) { struct rate_selection rsel; @@ -747,26 +647,114 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx) control->rts_cts_rate_idx = 0; } - if (tx->sta) { + if (tx->sta) control->aid = tx->sta->aid; - tx->sta->tx_packets++; - tx->sta->tx_fragments++; - tx->sta->tx_bytes += tx->skb->len; - if (tx->extra_frag) { - int i; - tx->sta->tx_fragments += tx->num_extra_frag; - for (i = 0; i < tx->num_extra_frag; i++) { - tx->sta->tx_bytes += - tx->extra_frag[i]->len; - } - } + + return TX_CONTINUE; +} + +static ieee80211_tx_result +ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; + size_t hdrlen, per_fragm, num_fragm, payload_len, left; + struct sk_buff **frags, *first, *frag; + int i; + u16 seq; + u8 *pos; + int frag_threshold = tx->local->fragmentation_threshold; + + if (!(tx->flags & IEEE80211_TX_FRAGMENTED)) + return TX_CONTINUE; + + first = tx->skb; + + hdrlen = ieee80211_get_hdrlen(tx->fc); + payload_len = first->len - hdrlen; + per_fragm = frag_threshold - hdrlen - FCS_LEN; + num_fragm = DIV_ROUND_UP(payload_len, per_fragm); + + frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC); + if (!frags) + goto fail; + + hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); + seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ; + pos = first->data + hdrlen + per_fragm; + left = payload_len - per_fragm; + for (i = 0; i < num_fragm - 1; i++) { + struct ieee80211_hdr *fhdr; + size_t copylen; + + if (left <= 0) + goto fail; + + /* reserve enough extra head and tail room for possible + * encryption */ + frag = frags[i] = + dev_alloc_skb(tx->local->tx_headroom + + frag_threshold + + IEEE80211_ENCRYPT_HEADROOM + + IEEE80211_ENCRYPT_TAILROOM); + if (!frag) + goto fail; + /* Make sure that all fragments use the same priority so + * that they end up using the same TX queue */ + frag->priority = first->priority; + skb_reserve(frag, tx->local->tx_headroom + + IEEE80211_ENCRYPT_HEADROOM); + fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen); + memcpy(fhdr, first->data, hdrlen); + if (i == num_fragm - 2) + fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS); + fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG)); + copylen = left > per_fragm ? per_fragm : left; + memcpy(skb_put(frag, copylen), pos, copylen); + + pos += copylen; + left -= copylen; } + skb_trim(first, hdrlen + per_fragm); + + tx->num_extra_frag = num_fragm - 1; + tx->extra_frag = frags; return TX_CONTINUE; + + fail: + printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name); + if (frags) { + for (i = 0; i < num_fragm - 1; i++) + if (frags[i]) + dev_kfree_skb(frags[i]); + kfree(frags); + } + I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment); + return TX_DROP; } static ieee80211_tx_result -ieee80211_tx_h_load_stats(struct ieee80211_tx_data *tx) +ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) +{ + if (!tx->key) + return TX_CONTINUE; + + switch (tx->key->conf.alg) { + case ALG_WEP: + return ieee80211_crypto_wep_encrypt(tx); + case ALG_TKIP: + return ieee80211_crypto_tkip_encrypt(tx); + case ALG_CCMP: + return ieee80211_crypto_ccmp_encrypt(tx); + } + + /* not reached */ + WARN_ON(1); + return TX_DROP; +} + +static ieee80211_tx_result +ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) { struct ieee80211_local *local = tx->local; struct sk_buff *skb = tx->skb; @@ -822,6 +810,20 @@ ieee80211_tx_h_load_stats(struct ieee80211_tx_data *tx) tx->sta->channel_use_raw += load; tx->sdata->channel_use_raw += load; + if (tx->sta) { + tx->sta->tx_packets++; + tx->sta->tx_fragments++; + tx->sta->tx_bytes += tx->skb->len; + if (tx->extra_frag) { + int i; + tx->sta->tx_fragments += tx->num_extra_frag; + for (i = 0; i < tx->num_extra_frag; i++) { + tx->sta->tx_bytes += + tx->extra_frag[i]->len; + } + } + } + return TX_CONTINUE; } @@ -834,11 +836,11 @@ static ieee80211_tx_handler ieee80211_tx_handlers[] = ieee80211_tx_h_ps_buf, ieee80211_tx_h_select_key, ieee80211_tx_h_michael_mic_add, - ieee80211_tx_h_fragment, - ieee80211_tx_h_encrypt, ieee80211_tx_h_rate_ctrl, ieee80211_tx_h_misc, - ieee80211_tx_h_load_stats, + ieee80211_tx_h_fragment, + ieee80211_tx_h_encrypt, + ieee80211_tx_h_stats, NULL }; |