diff options
Diffstat (limited to 'net/bluetooth/bnep/netdev.c')
| -rw-r--r-- | net/bluetooth/bnep/netdev.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/net/bluetooth/bnep/netdev.c b/net/bluetooth/bnep/netdev.c new file mode 100644 index 000000000..cc1cff631 --- /dev/null +++ b/net/bluetooth/bnep/netdev.c @@ -0,0 +1,230 @@ +/* + BNEP implementation for Linux Bluetooth stack (BlueZ). + Copyright (C) 2001-2002 Inventel Systemes + Written 2001-2002 by + Clément Moreau <clement.moreau@inventel.fr> + David Libault <david.libault@inventel.fr> + + Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License version 2 as + published by the Free Software Foundation; + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. + IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY + CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + + ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, + COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS + SOFTWARE IS DISCLAIMED. +*/ + +#include <linux/etherdevice.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> +#include <net/bluetooth/l2cap.h> + +#include "bnep.h" + +#define BNEP_TX_QUEUE_LEN 20 + +static int bnep_net_open(struct net_device *dev) +{ + netif_start_queue(dev); + return 0; +} + +static int bnep_net_close(struct net_device *dev) +{ + netif_stop_queue(dev); + return 0; +} + +static void bnep_net_set_mc_list(struct net_device *dev) +{ +#ifdef CONFIG_BT_BNEP_MC_FILTER + struct bnep_session *s = netdev_priv(dev); + struct sock *sk = s->sock->sk; + struct bnep_set_filter_req *r; + struct sk_buff *skb; + int size; + + BT_DBG("%s mc_count %d", dev->name, netdev_mc_count(dev)); + + size = sizeof(*r) + (BNEP_MAX_MULTICAST_FILTERS + 1) * ETH_ALEN * 2; + skb = alloc_skb(size, GFP_ATOMIC); + if (!skb) { + BT_ERR("%s Multicast list allocation failed", dev->name); + return; + } + + r = (void *) skb->data; + __skb_put(skb, sizeof(*r)); + + r->type = BNEP_CONTROL; + r->ctrl = BNEP_FILTER_MULTI_ADDR_SET; + + if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { + u8 start[ETH_ALEN] = { 0x01 }; + + /* Request all addresses */ + __skb_put_data(skb, start, ETH_ALEN); + __skb_put_data(skb, dev->broadcast, ETH_ALEN); + r->len = htons(ETH_ALEN * 2); + } else { + struct netdev_hw_addr *ha; + int i, len = skb->len; + + if (dev->flags & IFF_BROADCAST) { + __skb_put_data(skb, dev->broadcast, ETH_ALEN); + __skb_put_data(skb, dev->broadcast, ETH_ALEN); + } + + /* FIXME: We should group addresses here. */ + + i = 0; + netdev_for_each_mc_addr(ha, dev) { + if (i == BNEP_MAX_MULTICAST_FILTERS) + break; + __skb_put_data(skb, ha->addr, ETH_ALEN); + __skb_put_data(skb, ha->addr, ETH_ALEN); + + i++; + } + r->len = htons(skb->len - len); + } + + skb_queue_tail(&sk->sk_write_queue, skb); + wake_up_interruptible(sk_sleep(sk)); +#endif +} + +static int bnep_net_set_mac_addr(struct net_device *dev, void *arg) +{ + BT_DBG("%s", dev->name); + return 0; +} + +static void bnep_net_timeout(struct net_device *dev, unsigned int txqueue) +{ + BT_DBG("net_timeout"); + netif_wake_queue(dev); +} + +#ifdef CONFIG_BT_BNEP_MC_FILTER +static int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s) +{ + struct ethhdr *eh = (void *) skb->data; + + if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter)) + return 1; + return 0; +} +#endif + +#ifdef CONFIG_BT_BNEP_PROTO_FILTER +/* Determine ether protocol. Based on eth_type_trans. */ +static u16 bnep_net_eth_proto(struct sk_buff *skb) +{ + struct ethhdr *eh = (void *) skb->data; + u16 proto = ntohs(eh->h_proto); + + if (proto >= ETH_P_802_3_MIN) + return proto; + + if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF)) + return ETH_P_802_3; + + return ETH_P_802_2; +} + +static int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s) +{ + u16 proto = bnep_net_eth_proto(skb); + struct bnep_proto_filter *f = s->proto_filter; + int i; + + for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) { + if (proto >= f[i].start && proto <= f[i].end) + return 0; + } + + BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto); + return 1; +} +#endif + +static netdev_tx_t bnep_net_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct bnep_session *s = netdev_priv(dev); + struct sock *sk = s->sock->sk; + + BT_DBG("skb %p, dev %p", skb, dev); + +#ifdef CONFIG_BT_BNEP_MC_FILTER + if (bnep_net_mc_filter(skb, s)) { + kfree_skb(skb); + return NETDEV_TX_OK; + } +#endif + +#ifdef CONFIG_BT_BNEP_PROTO_FILTER + if (bnep_net_proto_filter(skb, s)) { + kfree_skb(skb); + return NETDEV_TX_OK; + } +#endif + + /* + * We cannot send L2CAP packets from here as we are potentially in a bh. + * So we have to queue them and wake up session thread which is sleeping + * on the sk_sleep(sk). + */ + netif_trans_update(dev); + skb_queue_tail(&sk->sk_write_queue, skb); + wake_up_interruptible(sk_sleep(sk)); + + if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) { + BT_DBG("tx queue is full"); + + /* Stop queuing. + * Session thread will do netif_wake_queue() */ + netif_stop_queue(dev); + } + + return NETDEV_TX_OK; +} + +static const struct net_device_ops bnep_netdev_ops = { + .ndo_open = bnep_net_open, + .ndo_stop = bnep_net_close, + .ndo_start_xmit = bnep_net_xmit, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_rx_mode = bnep_net_set_mc_list, + .ndo_set_mac_address = bnep_net_set_mac_addr, + .ndo_tx_timeout = bnep_net_timeout, + +}; + +void bnep_net_setup(struct net_device *dev) +{ + + eth_broadcast_addr(dev->broadcast); + dev->addr_len = ETH_ALEN; + + ether_setup(dev); + dev->min_mtu = 0; + dev->max_mtu = ETH_MAX_MTU; + dev->priv_flags &= ~IFF_TX_SKB_SHARING; + dev->netdev_ops = &bnep_netdev_ops; + + dev->watchdog_timeo = HZ * 2; +} |