diff options
Diffstat (limited to 'net/bluetooth/bnep/netdev.c')
| -rw-r--r-- | net/bluetooth/bnep/netdev.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/net/bluetooth/bnep/netdev.c b/net/bluetooth/bnep/netdev.c new file mode 100644 index 000000000000..921204f95f4a --- /dev/null +++ b/net/bluetooth/bnep/netdev.c @@ -0,0 +1,247 @@ +/* + 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. +*/ + +/* + * $Id: netdev.c,v 1.8 2002/08/04 21:23:58 maxk Exp $ + */ + +#include <linux/config.h> +#include <linux/module.h> + +#include <linux/socket.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/wait.h> + +#include <asm/unaligned.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> +#include <net/bluetooth/l2cap.h> + +#include "bnep.h" + +#ifndef CONFIG_BT_BNEP_DEBUG +#undef BT_DBG +#define BT_DBG( A... ) +#endif + +#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 struct net_device_stats *bnep_net_get_stats(struct net_device *dev) +{ + struct bnep_session *s = dev->priv; + return &s->stats; +} + +static void bnep_net_set_mc_list(struct net_device *dev) +{ +#ifdef CONFIG_BT_BNEP_MC_FILTER + struct bnep_session *s = dev->priv; + 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, dev->mc_count); + + 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 */ + memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN); + memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); + r->len = htons(ETH_ALEN * 2); + } else { + struct dev_mc_list *dmi = dev->mc_list; + int i, len = skb->len; + + if (dev->flags & IFF_BROADCAST) { + memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); + memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); + } + + /* FIXME: We should group addresses here. */ + + for (i = 0; i < dev->mc_count && i < BNEP_MAX_MULTICAST_FILTERS; i++) { + memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN); + memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN); + dmi = dmi->next; + } + r->len = htons(skb->len - len); + } + + skb_queue_tail(&sk->sk_write_queue, skb); + wake_up_interruptible(sk->sk_sleep); +#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) +{ + BT_DBG("net_timeout"); + netif_wake_queue(dev); +} + +static int bnep_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + return -EINVAL; +} + +#ifdef CONFIG_BT_BNEP_MC_FILTER +static inline 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 inline u16 bnep_net_eth_proto(struct sk_buff *skb) +{ + struct ethhdr *eh = (void *) skb->data; + + if (ntohs(eh->h_proto) >= 1536) + return eh->h_proto; + + if (get_unaligned((u16 *) skb->data) == 0xFFFF) + return htons(ETH_P_802_3); + + return htons(ETH_P_802_2); +} + +static inline 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 int bnep_net_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct bnep_session *s = dev->priv; + 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 0; + } +#endif + +#ifdef CONFIG_BT_BNEP_PROTO_FILTER + if (bnep_net_proto_filter(skb, s)) { + kfree_skb(skb); + return 0; + } +#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->sk_sleep. + */ + dev->trans_start = jiffies; + skb_queue_tail(&sk->sk_write_queue, skb); + wake_up_interruptible(sk->sk_sleep); + + 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 0; +} + +void bnep_net_setup(struct net_device *dev) +{ + + memset(dev->broadcast, 0xff, ETH_ALEN); + dev->addr_len = ETH_ALEN; + + ether_setup(dev); + + dev->open = bnep_net_open; + dev->stop = bnep_net_close; + dev->hard_start_xmit = bnep_net_xmit; + dev->get_stats = bnep_net_get_stats; + dev->do_ioctl = bnep_net_ioctl; + dev->set_mac_address = bnep_net_set_mac_addr; + dev->set_multicast_list = bnep_net_set_mc_list; + + dev->watchdog_timeo = HZ * 2; + dev->tx_timeout = bnep_net_timeout; +} |