diff options
Diffstat (limited to 'net/bluetooth/bnep/core.c')
| -rw-r--r-- | net/bluetooth/bnep/core.c | 297 |
1 files changed, 153 insertions, 144 deletions
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c index 682bf20af52..a841d3e776c 100644 --- a/net/bluetooth/bnep/core.c +++ b/net/bluetooth/bnep/core.c @@ -1,8 +1,8 @@ -/* +/* BNEP implementation for Linux Bluetooth stack (BlueZ). Copyright (C) 2001-2002 Inventel Systemes Written 2001-2002 by - Clément Moreau <clement.moreau@inventel.fr> + Clément Moreau <clement.moreau@inventel.fr> David Libault <david.libault@inventel.fr> Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> @@ -15,53 +15,32 @@ 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 + 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 + ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, + COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS SOFTWARE IS DISCLAIMED. */ -/* - * $Id: core.c,v 1.20 2002/08/04 21:23:58 maxk Exp $ - */ - -#include <linux/config.h> #include <linux/module.h> - -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/init.h> -#include <linux/wait.h> -#include <linux/errno.h> -#include <linux/smp_lock.h> -#include <linux/net.h> -#include <net/sock.h> - -#include <linux/socket.h> +#include <linux/kthread.h> #include <linux/file.h> - -#include <linux/netdevice.h> #include <linux/etherdevice.h> -#include <linux/skbuff.h> - #include <asm/unaligned.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/l2cap.h> +#include <net/bluetooth/hci_core.h> #include "bnep.h" -#ifndef CONFIG_BT_BNEP_DEBUG -#undef BT_DBG -#define BT_DBG(D...) -#endif +#define VERSION "1.3" -#define VERSION "1.2" +static bool compress_src = true; +static bool compress_dst = true; static LIST_HEAD(bnep_session_list); static DECLARE_RWSEM(bnep_session_sem); @@ -69,31 +48,24 @@ static DECLARE_RWSEM(bnep_session_sem); static struct bnep_session *__bnep_get_session(u8 *dst) { struct bnep_session *s; - struct list_head *p; BT_DBG(""); - list_for_each(p, &bnep_session_list) { - s = list_entry(p, struct bnep_session, list); - if (!memcmp(dst, s->eh.h_source, ETH_ALEN)) + list_for_each_entry(s, &bnep_session_list, list) + if (ether_addr_equal(dst, s->eh.h_source)) return s; - } + return NULL; } static void __bnep_link_session(struct bnep_session *s) { - /* It's safe to call __module_get() here because sessions are added - by the socket layer which has to hold the refference to this module. - */ - __module_get(THIS_MODULE); - list_add(&s->list, &bnep_session_list); + list_add(&s->list, &bnep_session_list); } static void __bnep_unlink_session(struct bnep_session *s) { list_del(&s->list); - module_put(THIS_MODULE); } static int bnep_send(struct bnep_session *s, void *data, size_t len) @@ -117,26 +89,27 @@ static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp) static inline void bnep_set_default_proto_filter(struct bnep_session *s) { /* (IPv4, ARP) */ - s->proto_filter[0].start = htons(0x0800); - s->proto_filter[0].end = htons(0x0806); + s->proto_filter[0].start = ETH_P_IP; + s->proto_filter[0].end = ETH_P_ARP; /* (RARP, AppleTalk) */ - s->proto_filter[1].start = htons(0x8035); - s->proto_filter[1].end = htons(0x80F3); + s->proto_filter[1].start = ETH_P_RARP; + s->proto_filter[1].end = ETH_P_AARP; /* (IPX, IPv6) */ - s->proto_filter[2].start = htons(0x8137); - s->proto_filter[2].end = htons(0x86DD); + s->proto_filter[2].start = ETH_P_IPX; + s->proto_filter[2].end = ETH_P_IPV6; } #endif -static int bnep_ctrl_set_netfilter(struct bnep_session *s, u16 *data, int len) +static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len) { int n; if (len < 2) return -EILSEQ; - n = ntohs(get_unaligned(data)); - data++; len -= 2; + n = get_unaligned_be16(data); + data++; + len -= 2; if (len < n) return -EILSEQ; @@ -150,8 +123,8 @@ static int bnep_ctrl_set_netfilter(struct bnep_session *s, u16 *data, int len) int i; for (i = 0; i < n; i++) { - f[i].start = get_unaligned(data++); - f[i].end = get_unaligned(data++); + f[i].start = get_unaligned_be16(data++); + f[i].end = get_unaligned_be16(data++); BT_DBG("proto filter start %d end %d", f[i].start, f[i].end); @@ -180,8 +153,9 @@ static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) if (len < 2) return -EILSEQ; - n = ntohs(get_unaligned((u16 *) data)); - data += 2; len -= 2; + n = get_unaligned_be16(data); + data += 2; + len -= 2; if (len < n) return -EILSEQ; @@ -192,6 +166,8 @@ static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) n /= (ETH_ALEN * 2); if (n > 0) { + int i; + s->mc_filter = 0; /* Always send broadcast */ @@ -201,18 +177,21 @@ static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) for (; n > 0; n--) { u8 a1[6], *a2; - memcpy(a1, data, ETH_ALEN); data += ETH_ALEN; - a2 = data; data += ETH_ALEN; - - BT_DBG("mc filter %s -> %s", - batostr((void *) a1), batostr((void *) a2)); + memcpy(a1, data, ETH_ALEN); + data += ETH_ALEN; + a2 = data; + data += ETH_ALEN; - #define INCA(a) { int i = 5; while (i >=0 && ++a[i--] == 0); } + BT_DBG("mc filter %pMR -> %pMR", a1, a2); /* Iterate from a1 to a2 */ set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) { - INCA(a1); + /* Increment a1 */ + i = 5; + while (i >= 0 && ++a1[i--] == 0) + ; + set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); } } @@ -232,11 +211,11 @@ static int bnep_rx_control(struct bnep_session *s, void *data, int len) u8 cmd = *(u8 *)data; int err = 0; - data++; len--; + data++; + len--; switch (cmd) { case BNEP_CMD_NOT_UNDERSTOOD: - case BNEP_SETUP_CONN_REQ: case BNEP_SETUP_CONN_RSP: case BNEP_FILTER_NET_TYPE_RSP: case BNEP_FILTER_MULTI_ADDR_RSP: @@ -251,6 +230,10 @@ static int bnep_rx_control(struct bnep_session *s, void *data, int len) err = bnep_ctrl_set_mcfilter(s, data, len); break; + case BNEP_SETUP_CONN_REQ: + err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP, BNEP_CONN_NOT_ALLOWED); + break; + default: { u8 pkt[3]; pkt[0] = BNEP_CONTROL; @@ -277,7 +260,7 @@ static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb) } BT_DBG("type 0x%x len %d", h->type, h->len); - + switch (h->type & BNEP_TYPE_MASK) { case BNEP_EXT_CONTROL: bnep_rx_control(s, skb->data, skb->len); @@ -293,7 +276,7 @@ static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb) break; } } while (!err && (h->type & BNEP_EXT_HEADER)); - + return err; } @@ -304,35 +287,34 @@ static u8 __bnep_rx_hlen[] = { ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */ ETH_ALEN + 2 /* BNEP_COMPRESSED_DST_ONLY */ }; -#define BNEP_RX_TYPES (sizeof(__bnep_rx_hlen) - 1) -static inline int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) +static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) { struct net_device *dev = s->dev; struct sk_buff *nskb; u8 type; - dev->last_rx = jiffies; - s->stats.rx_bytes += skb->len; + dev->stats.rx_bytes += skb->len; - type = *(u8 *) skb->data; skb_pull(skb, 1); + type = *(u8 *) skb->data; + skb_pull(skb, 1); - if ((type & BNEP_TYPE_MASK) > BNEP_RX_TYPES) + if ((type & BNEP_TYPE_MASK) >= sizeof(__bnep_rx_hlen)) goto badframe; - + if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) { bnep_rx_control(s, skb->data, skb->len); kfree_skb(skb); return 0; } - skb->mac.raw = skb->data; + skb_reset_mac_header(skb); /* Verify and pull out header */ if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK])) goto badframe; - s->eh.h_proto = get_unaligned((u16 *) (skb->data - 2)); + s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); if (type & BNEP_EXT_HEADER) { if (bnep_rx_extension(s, skb) < 0) @@ -340,17 +322,17 @@ static inline int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) } /* Strip 802.1p header */ - if (ntohs(s->eh.h_proto) == 0x8100) { + if (ntohs(s->eh.h_proto) == ETH_P_8021Q) { if (!skb_pull(skb, 4)) goto badframe; - s->eh.h_proto = get_unaligned((u16 *) (skb->data - 2)); + s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); } - + /* We have to alloc new skb and copy data here :(. Because original skb * may not be modified and because of the alignment requirements. */ nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL); if (!nskb) { - s->stats.rx_dropped++; + dev->stats.rx_dropped++; kfree_skb(skb); return -ENOMEM; } @@ -361,36 +343,38 @@ static inline int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) case BNEP_COMPRESSED: memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN); break; - + case BNEP_COMPRESSED_SRC_ONLY: memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN); - memcpy(__skb_put(nskb, ETH_ALEN), skb->mac.raw, ETH_ALEN); - put_unaligned(s->eh.h_proto, (u16 *) __skb_put(nskb, 2)); + memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN); + put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); break; case BNEP_COMPRESSED_DST_ONLY: - memcpy(__skb_put(nskb, ETH_ALEN), skb->mac.raw, ETH_ALEN); - memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source, ETH_ALEN + 2); + memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), + ETH_ALEN); + memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source, + ETH_ALEN + 2); break; case BNEP_GENERAL: - memcpy(__skb_put(nskb, ETH_ALEN * 2), skb->mac.raw, ETH_ALEN * 2); - put_unaligned(s->eh.h_proto, (u16 *) __skb_put(nskb, 2)); + memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb), + ETH_ALEN * 2); + put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); break; } - memcpy(__skb_put(nskb, skb->len), skb->data, skb->len); + skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len); kfree_skb(skb); - - s->stats.rx_packets++; - nskb->dev = dev; + + dev->stats.rx_packets++; nskb->ip_summed = CHECKSUM_NONE; nskb->protocol = eth_type_trans(nskb, dev); netif_rx_ni(nskb); return 0; badframe: - s->stats.rx_errors++; + dev->stats.rx_errors++; kfree_skb(skb); return 0; } @@ -402,7 +386,7 @@ static u8 __bnep_tx_types[] = { BNEP_COMPRESSED }; -static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) +static int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) { struct ethhdr *eh = (void *) skb->data; struct socket *sock = s->sock; @@ -420,10 +404,10 @@ static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) iv[il++] = (struct kvec) { &type, 1 }; len++; - if (!memcmp(eh->h_dest, s->eh.h_source, ETH_ALEN)) + if (compress_src && ether_addr_equal(eh->h_dest, s->eh.h_source)) type |= 0x01; - if (!memcmp(eh->h_source, s->eh.h_dest, ETH_ALEN)) + if (compress_dst && ether_addr_equal(eh->h_source, s->eh.h_dest)) type |= 0x02; if (type) @@ -435,7 +419,7 @@ static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN }; len += ETH_ALEN; break; - + case BNEP_COMPRESSED_DST_ONLY: iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN }; len += ETH_ALEN; @@ -445,7 +429,7 @@ static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) send: iv[il++] = (struct kvec) { skb->data, skb->len }; len += skb->len; - + /* FIXME: linearize skb */ { len = kernel_sendmsg(sock, &s->msg, iv, il, len); @@ -453,8 +437,8 @@ send: kfree_skb(skb); if (len > 0) { - s->stats.tx_bytes += len; - s->stats.tx_packets++; + s->dev->stats.tx_bytes += len; + s->dev->stats.tx_packets++; return 0; } @@ -471,34 +455,37 @@ static int bnep_session(void *arg) BT_DBG(""); - daemonize("kbnepd %s", dev->name); set_user_nice(current, -15); - current->flags |= PF_NOFREEZE; init_waitqueue_entry(&wait, current); - add_wait_queue(sk->sk_sleep, &wait); - while (!atomic_read(&s->killed)) { + add_wait_queue(sk_sleep(sk), &wait); + while (1) { set_current_state(TASK_INTERRUPTIBLE); - // RX + if (atomic_read(&s->terminate)) + break; + /* RX */ while ((skb = skb_dequeue(&sk->sk_receive_queue))) { skb_orphan(skb); - bnep_rx_frame(s, skb); + if (!skb_linearize(skb)) + bnep_rx_frame(s, skb); + else + kfree_skb(skb); } if (sk->sk_state != BT_CONNECTED) break; - - // TX + + /* TX */ while ((skb = skb_dequeue(&sk->sk_write_queue))) if (bnep_tx_frame(s, skb)) break; netif_wake_queue(dev); - + schedule(); } - set_current_state(TASK_RUNNING); - remove_wait_queue(sk->sk_sleep, &wait); + __set_current_state(TASK_RUNNING); + remove_wait_queue(sk_sleep(sk), &wait); /* Cleanup session */ down_write(&bnep_session_sem); @@ -506,6 +493,11 @@ static int bnep_session(void *arg) /* Delete network device */ unregister_netdev(dev); + /* Wakeup user-space polling for socket errors */ + s->sock->sk->sk_err = EUNATCH; + + wake_up_interruptible(sk_sleep(s->sock->sk)); + /* Release the socket */ fput(s->sock->file); @@ -513,9 +505,25 @@ static int bnep_session(void *arg) up_write(&bnep_session_sem); free_netdev(dev); + module_put_and_exit(0); return 0; } +static struct device *bnep_get_device(struct bnep_session *session) +{ + struct hci_conn *conn; + + conn = l2cap_pi(session->sock->sk)->chan->conn->hcon; + if (!conn) + return NULL; + + return &conn->dev; +} + +static struct device_type bnep_type = { + .name = "bluetooth", +}; + int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) { struct net_device *dev; @@ -525,16 +533,15 @@ int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) BT_DBG(""); - baswap((void *) dst, &bt_sk(sock->sk)->dst); - baswap((void *) src, &bt_sk(sock->sk)->src); + baswap((void *) dst, &l2cap_pi(sock->sk)->chan->dst); + baswap((void *) src, &l2cap_pi(sock->sk)->chan->src); /* session struct allocated as private part of net_device */ dev = alloc_netdev(sizeof(struct bnep_session), - (*req->device) ? req->device : "bnep%d", - bnep_net_setup); - if (!dev) - return ENOMEM; - + (*req->device) ? req->device : "bnep%d", + bnep_net_setup); + if (!dev) + return -ENOMEM; down_write(&bnep_session_sem); @@ -544,19 +551,19 @@ int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) goto failed; } - s = dev->priv; + s = netdev_priv(dev); /* This is rx header therefore addresses are swapped. - * ie eh.h_dest is our local address. */ + * ie. eh.h_dest is our local address. */ memcpy(s->eh.h_dest, &src, ETH_ALEN); memcpy(s->eh.h_source, &dst, ETH_ALEN); memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN); - s->dev = dev; + s->dev = dev; s->sock = sock; s->role = req->role; s->state = BT_CONNECTED; - + s->msg.msg_flags = MSG_NOSIGNAL; #ifdef CONFIG_BT_BNEP_MC_FILTER @@ -569,18 +576,23 @@ int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) bnep_set_default_proto_filter(s); #endif + SET_NETDEV_DEV(dev, bnep_get_device(s)); + SET_NETDEV_DEVTYPE(dev, &bnep_type); + err = register_netdev(dev); - if (err) { + if (err) goto failed; - } __bnep_link_session(s); - - err = kernel_thread(bnep_session, s, CLONE_KERNEL); - if (err < 0) { + + __module_get(THIS_MODULE); + s->task = kthread_run(bnep_session, s, "kbnepd %s", dev->name); + if (IS_ERR(s->task)) { /* Session thread start failed, gotta cleanup. */ + module_put(THIS_MODULE); unregister_netdev(dev); __bnep_unlink_session(s); + err = PTR_ERR(s->task); goto failed; } @@ -605,13 +617,8 @@ int bnep_del_connection(struct bnep_conndel_req *req) s = __bnep_get_session(req->dst); if (s) { - /* Wakeup user-space which is polling for socket errors. - * This is temporary hack untill we have shutdown in L2CAP */ - s->sock->sk->sk_err = EUNATCH; - - /* Kill session thread */ - atomic_inc(&s->killed); - wake_up_interruptible(s->sock->sk->sk_sleep); + atomic_inc(&s->terminate); + wake_up_process(s->task); } else err = -ENOENT; @@ -621,6 +628,7 @@ int bnep_del_connection(struct bnep_conndel_req *req) static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s) { + memset(ci, 0, sizeof(*ci)); memcpy(ci->dst, s->eh.h_source, ETH_ALEN); strcpy(ci->device, s->dev->name); ci->flags = s->flags; @@ -630,19 +638,16 @@ static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s) int bnep_get_connlist(struct bnep_connlist_req *req) { - struct list_head *p; + struct bnep_session *s; int err = 0, n = 0; down_read(&bnep_session_sem); - list_for_each(p, &bnep_session_list) { - struct bnep_session *s; + list_for_each_entry(s, &bnep_session_list, list) { struct bnep_conninfo ci; - s = list_entry(p, struct bnep_session, list); - __bnep_copy_ci(&ci, s); - + if (copy_to_user(req->ci, &ci, sizeof(ci))) { err = -EFAULT; break; @@ -677,11 +682,9 @@ int bnep_get_conninfo(struct bnep_conninfo *ci) } static int __init bnep_init(void) -{ +{ char flt[50] = ""; - l2cap_load(); - #ifdef CONFIG_BT_BNEP_PROTO_FILTER strcat(flt, "protocol "); #endif @@ -706,7 +709,13 @@ static void __exit bnep_exit(void) module_init(bnep_init); module_exit(bnep_exit); -MODULE_AUTHOR("David Libault <david.libault@inventel.fr>, Maxim Krasnyansky <maxk@qualcomm.com>"); +module_param(compress_src, bool, 0644); +MODULE_PARM_DESC(compress_src, "Compress sources headers"); + +module_param(compress_dst, bool, 0644); +MODULE_PARM_DESC(compress_dst, "Compress destination headers"); + +MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL"); |
