YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | BNEP implementation for Linux Bluetooth stack (BlueZ). |
| 3 | Copyright (C) 2001-2002 Inventel Systemes |
| 4 | Written 2001-2002 by |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 5 | Clément Moreau <clement.moreau@inventel.fr> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | David Libault <david.libault@inventel.fr> |
| 7 | |
| 8 | Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License version 2 as |
| 12 | published by the Free Software Foundation; |
| 13 | |
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 17 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 18 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | SOFTWARE IS DISCLAIMED. |
| 26 | */ |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | |
| 30 | #include <linux/socket.h> |
| 31 | #include <linux/netdevice.h> |
| 32 | #include <linux/etherdevice.h> |
| 33 | #include <linux/skbuff.h> |
| 34 | #include <linux/wait.h> |
| 35 | |
| 36 | #include <asm/unaligned.h> |
| 37 | |
| 38 | #include <net/bluetooth/bluetooth.h> |
| 39 | #include <net/bluetooth/hci_core.h> |
| 40 | #include <net/bluetooth/l2cap.h> |
| 41 | |
| 42 | #include "bnep.h" |
| 43 | |
| 44 | #ifndef CONFIG_BT_BNEP_DEBUG |
| 45 | #undef BT_DBG |
| 46 | #define BT_DBG( A... ) |
| 47 | #endif |
| 48 | |
| 49 | #define BNEP_TX_QUEUE_LEN 20 |
| 50 | |
| 51 | static int bnep_net_open(struct net_device *dev) |
| 52 | { |
| 53 | netif_start_queue(dev); |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | static int bnep_net_close(struct net_device *dev) |
| 58 | { |
| 59 | netif_stop_queue(dev); |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static struct net_device_stats *bnep_net_get_stats(struct net_device *dev) |
| 64 | { |
Wang Chen | 524ad0a | 2008-11-12 23:39:10 -0800 | [diff] [blame^] | 65 | struct bnep_session *s = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | return &s->stats; |
| 67 | } |
| 68 | |
| 69 | static void bnep_net_set_mc_list(struct net_device *dev) |
| 70 | { |
| 71 | #ifdef CONFIG_BT_BNEP_MC_FILTER |
Wang Chen | 524ad0a | 2008-11-12 23:39:10 -0800 | [diff] [blame^] | 72 | struct bnep_session *s = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | struct sock *sk = s->sock->sk; |
| 74 | struct bnep_set_filter_req *r; |
| 75 | struct sk_buff *skb; |
| 76 | int size; |
| 77 | |
| 78 | BT_DBG("%s mc_count %d", dev->name, dev->mc_count); |
| 79 | |
| 80 | size = sizeof(*r) + (BNEP_MAX_MULTICAST_FILTERS + 1) * ETH_ALEN * 2; |
| 81 | skb = alloc_skb(size, GFP_ATOMIC); |
| 82 | if (!skb) { |
| 83 | BT_ERR("%s Multicast list allocation failed", dev->name); |
| 84 | return; |
| 85 | } |
| 86 | |
| 87 | r = (void *) skb->data; |
| 88 | __skb_put(skb, sizeof(*r)); |
| 89 | |
| 90 | r->type = BNEP_CONTROL; |
| 91 | r->ctrl = BNEP_FILTER_MULTI_ADDR_SET; |
| 92 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 93 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | u8 start[ETH_ALEN] = { 0x01 }; |
| 95 | |
| 96 | /* Request all addresses */ |
| 97 | memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN); |
| 98 | memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); |
| 99 | r->len = htons(ETH_ALEN * 2); |
| 100 | } else { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 101 | struct dev_mc_list *dmi = dev->mc_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | int i, len = skb->len; |
| 103 | |
| 104 | if (dev->flags & IFF_BROADCAST) { |
| 105 | memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); |
| 106 | memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 107 | } |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | /* FIXME: We should group addresses here. */ |
| 110 | |
| 111 | for (i = 0; i < dev->mc_count && i < BNEP_MAX_MULTICAST_FILTERS; i++) { |
| 112 | memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN); |
| 113 | memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN); |
| 114 | dmi = dmi->next; |
| 115 | } |
| 116 | r->len = htons(skb->len - len); |
| 117 | } |
| 118 | |
| 119 | skb_queue_tail(&sk->sk_write_queue, skb); |
| 120 | wake_up_interruptible(sk->sk_sleep); |
| 121 | #endif |
| 122 | } |
| 123 | |
| 124 | static int bnep_net_set_mac_addr(struct net_device *dev, void *arg) |
| 125 | { |
| 126 | BT_DBG("%s", dev->name); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static void bnep_net_timeout(struct net_device *dev) |
| 131 | { |
| 132 | BT_DBG("net_timeout"); |
| 133 | netif_wake_queue(dev); |
| 134 | } |
| 135 | |
| 136 | static int bnep_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 137 | { |
| 138 | return -EINVAL; |
| 139 | } |
| 140 | |
| 141 | #ifdef CONFIG_BT_BNEP_MC_FILTER |
| 142 | static inline int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s) |
| 143 | { |
| 144 | struct ethhdr *eh = (void *) skb->data; |
| 145 | |
| 146 | if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter)) |
| 147 | return 1; |
| 148 | return 0; |
| 149 | } |
| 150 | #endif |
| 151 | |
| 152 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER |
| 153 | /* Determine ether protocol. Based on eth_type_trans. */ |
| 154 | static inline u16 bnep_net_eth_proto(struct sk_buff *skb) |
| 155 | { |
| 156 | struct ethhdr *eh = (void *) skb->data; |
Al Viro | e41d216 | 2006-11-08 00:27:36 -0800 | [diff] [blame] | 157 | u16 proto = ntohs(eh->h_proto); |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 158 | |
Al Viro | e41d216 | 2006-11-08 00:27:36 -0800 | [diff] [blame] | 159 | if (proto >= 1536) |
| 160 | return proto; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 161 | |
Al Viro | e41d216 | 2006-11-08 00:27:36 -0800 | [diff] [blame] | 162 | if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF)) |
| 163 | return ETH_P_802_3; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 164 | |
Al Viro | e41d216 | 2006-11-08 00:27:36 -0800 | [diff] [blame] | 165 | return ETH_P_802_2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | static inline int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s) |
| 169 | { |
| 170 | u16 proto = bnep_net_eth_proto(skb); |
| 171 | struct bnep_proto_filter *f = s->proto_filter; |
| 172 | int i; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) { |
| 175 | if (proto >= f[i].start && proto <= f[i].end) |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto); |
| 180 | return 1; |
| 181 | } |
| 182 | #endif |
| 183 | |
| 184 | static int bnep_net_xmit(struct sk_buff *skb, struct net_device *dev) |
| 185 | { |
Wang Chen | 524ad0a | 2008-11-12 23:39:10 -0800 | [diff] [blame^] | 186 | struct bnep_session *s = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | struct sock *sk = s->sock->sk; |
| 188 | |
| 189 | BT_DBG("skb %p, dev %p", skb, dev); |
| 190 | |
| 191 | #ifdef CONFIG_BT_BNEP_MC_FILTER |
| 192 | if (bnep_net_mc_filter(skb, s)) { |
| 193 | kfree_skb(skb); |
| 194 | return 0; |
| 195 | } |
| 196 | #endif |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 197 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER |
| 199 | if (bnep_net_proto_filter(skb, s)) { |
| 200 | kfree_skb(skb); |
| 201 | return 0; |
| 202 | } |
| 203 | #endif |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | /* |
| 206 | * We cannot send L2CAP packets from here as we are potentially in a bh. |
| 207 | * So we have to queue them and wake up session thread which is sleeping |
| 208 | * on the sk->sk_sleep. |
| 209 | */ |
| 210 | dev->trans_start = jiffies; |
| 211 | skb_queue_tail(&sk->sk_write_queue, skb); |
| 212 | wake_up_interruptible(sk->sk_sleep); |
| 213 | |
| 214 | if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) { |
| 215 | BT_DBG("tx queue is full"); |
| 216 | |
| 217 | /* Stop queuing. |
| 218 | * Session thread will do netif_wake_queue() */ |
| 219 | netif_stop_queue(dev); |
| 220 | } |
| 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | void bnep_net_setup(struct net_device *dev) |
| 226 | { |
| 227 | |
| 228 | memset(dev->broadcast, 0xff, ETH_ALEN); |
| 229 | dev->addr_len = ETH_ALEN; |
| 230 | |
| 231 | ether_setup(dev); |
| 232 | |
| 233 | dev->open = bnep_net_open; |
| 234 | dev->stop = bnep_net_close; |
| 235 | dev->hard_start_xmit = bnep_net_xmit; |
| 236 | dev->get_stats = bnep_net_get_stats; |
| 237 | dev->do_ioctl = bnep_net_ioctl; |
| 238 | dev->set_mac_address = bnep_net_set_mac_addr; |
| 239 | dev->set_multicast_list = bnep_net_set_mc_list; |
| 240 | |
| 241 | dev->watchdog_timeo = HZ * 2; |
| 242 | dev->tx_timeout = bnep_net_timeout; |
| 243 | } |