| /* |
| * IEEE802154.4 socket interface |
| * |
| * Copyright 2007, 2008 Siemens AG |
| * |
| * 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. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Written by: |
| * Sergey Lapin <slapin@ossfans.org> |
| * Maxim Gorbachyov <maxim.gorbachev@siemens.com> |
| */ |
| |
| #include <linux/net.h> |
| #include <linux/capability.h> |
| #include <linux/module.h> |
| #include <linux/if_arp.h> |
| #include <linux/if.h> |
| #include <linux/termios.h> /* For TIOCOUTQ/INQ */ |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <net/datalink.h> |
| #include <net/psnap.h> |
| #include <net/sock.h> |
| #include <net/tcp_states.h> |
| #include <net/route.h> |
| |
| #include <net/af_ieee802154.h> |
| #include <net/ieee802154_netdev.h> |
| |
| #include "af802154.h" |
| |
| /* |
| * Utility function for families |
| */ |
| struct net_device* |
| ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) |
| { |
| struct net_device *dev = NULL; |
| struct net_device *tmp; |
| __le16 pan_id, short_addr; |
| u8 hwaddr[IEEE802154_ADDR_LEN]; |
| |
| switch (addr->mode) { |
| case IEEE802154_ADDR_LONG: |
| ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr); |
| rcu_read_lock(); |
| dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr); |
| if (dev) |
| dev_hold(dev); |
| rcu_read_unlock(); |
| break; |
| case IEEE802154_ADDR_SHORT: |
| if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) || |
| addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || |
| addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) |
| break; |
| |
| rtnl_lock(); |
| |
| for_each_netdev(net, tmp) { |
| if (tmp->type != ARPHRD_IEEE802154) |
| continue; |
| |
| pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp); |
| short_addr = |
| ieee802154_mlme_ops(tmp)->get_short_addr(tmp); |
| |
| if (pan_id == addr->pan_id && |
| short_addr == addr->short_addr) { |
| dev = tmp; |
| dev_hold(dev); |
| break; |
| } |
| } |
| |
| rtnl_unlock(); |
| break; |
| default: |
| pr_warning("Unsupported ieee802154 address type: %d\n", |
| addr->mode); |
| break; |
| } |
| |
| return dev; |
| } |
| |
| static int ieee802154_sock_release(struct socket *sock) |
| { |
| struct sock *sk = sock->sk; |
| |
| if (sk) { |
| sock->sk = NULL; |
| sk->sk_prot->close(sk, 0); |
| } |
| return 0; |
| } |
| static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
| struct msghdr *msg, size_t len) |
| { |
| struct sock *sk = sock->sk; |
| |
| return sk->sk_prot->sendmsg(iocb, sk, msg, len); |
| } |
| |
| static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr, |
| int addr_len) |
| { |
| struct sock *sk = sock->sk; |
| |
| if (sk->sk_prot->bind) |
| return sk->sk_prot->bind(sk, uaddr, addr_len); |
| |
| return sock_no_bind(sock, uaddr, addr_len); |
| } |
| |
| static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr, |
| int addr_len, int flags) |
| { |
| struct sock *sk = sock->sk; |
| |
| if (addr_len < sizeof(uaddr->sa_family)) |
| return -EINVAL; |
| |
| if (uaddr->sa_family == AF_UNSPEC) |
| return sk->sk_prot->disconnect(sk, flags); |
| |
| return sk->sk_prot->connect(sk, uaddr, addr_len); |
| } |
| |
| static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg, |
| unsigned int cmd) |
| { |
| struct ifreq ifr; |
| int ret = -ENOIOCTLCMD; |
| struct net_device *dev; |
| |
| if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
| return -EFAULT; |
| |
| ifr.ifr_name[IFNAMSIZ-1] = 0; |
| |
| dev_load(sock_net(sk), ifr.ifr_name); |
| dev = dev_get_by_name(sock_net(sk), ifr.ifr_name); |
| |
| if (!dev) |
| return -ENODEV; |
| |
| if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl) |
| ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd); |
| |
| if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq))) |
| ret = -EFAULT; |
| dev_put(dev); |
| |
| return ret; |
| } |
| |
| static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct sock *sk = sock->sk; |
| |
| switch (cmd) { |
| case SIOCGSTAMP: |
| return sock_get_timestamp(sk, (struct timeval __user *)arg); |
| case SIOCGSTAMPNS: |
| return sock_get_timestampns(sk, (struct timespec __user *)arg); |
| case SIOCGIFADDR: |
| case SIOCSIFADDR: |
| return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg, |
| cmd); |
| default: |
| if (!sk->sk_prot->ioctl) |
| return -ENOIOCTLCMD; |
| return sk->sk_prot->ioctl(sk, cmd, arg); |
| } |
| } |
| |
| static const struct proto_ops ieee802154_raw_ops = { |
| .family = PF_IEEE802154, |
| .owner = THIS_MODULE, |
| .release = ieee802154_sock_release, |
| .bind = ieee802154_sock_bind, |
| .connect = ieee802154_sock_connect, |
| .socketpair = sock_no_socketpair, |
| .accept = sock_no_accept, |
| .getname = sock_no_getname, |
| .poll = datagram_poll, |
| .ioctl = ieee802154_sock_ioctl, |
| .listen = sock_no_listen, |
| .shutdown = sock_no_shutdown, |
| .setsockopt = sock_common_setsockopt, |
| .getsockopt = sock_common_getsockopt, |
| .sendmsg = ieee802154_sock_sendmsg, |
| .recvmsg = sock_common_recvmsg, |
| .mmap = sock_no_mmap, |
| .sendpage = sock_no_sendpage, |
| #ifdef CONFIG_COMPAT |
| .compat_setsockopt = compat_sock_common_setsockopt, |
| .compat_getsockopt = compat_sock_common_getsockopt, |
| #endif |
| }; |
| |
| static const struct proto_ops ieee802154_dgram_ops = { |
| .family = PF_IEEE802154, |
| .owner = THIS_MODULE, |
| .release = ieee802154_sock_release, |
| .bind = ieee802154_sock_bind, |
| .connect = ieee802154_sock_connect, |
| .socketpair = sock_no_socketpair, |
| .accept = sock_no_accept, |
| .getname = sock_no_getname, |
| .poll = datagram_poll, |
| .ioctl = ieee802154_sock_ioctl, |
| .listen = sock_no_listen, |
| .shutdown = sock_no_shutdown, |
| .setsockopt = sock_common_setsockopt, |
| .getsockopt = sock_common_getsockopt, |
| .sendmsg = ieee802154_sock_sendmsg, |
| .recvmsg = sock_common_recvmsg, |
| .mmap = sock_no_mmap, |
| .sendpage = sock_no_sendpage, |
| #ifdef CONFIG_COMPAT |
| .compat_setsockopt = compat_sock_common_setsockopt, |
| .compat_getsockopt = compat_sock_common_getsockopt, |
| #endif |
| }; |
| |
| |
| /* |
| * Create a socket. Initialise the socket, blank the addresses |
| * set the state. |
| */ |
| static int ieee802154_create(struct net *net, struct socket *sock, |
| int protocol, int kern) |
| { |
| struct sock *sk; |
| int rc; |
| struct proto *proto; |
| const struct proto_ops *ops; |
| |
| if (!net_eq(net, &init_net)) |
| return -EAFNOSUPPORT; |
| |
| switch (sock->type) { |
| case SOCK_RAW: |
| proto = &ieee802154_raw_prot; |
| ops = &ieee802154_raw_ops; |
| break; |
| case SOCK_DGRAM: |
| proto = &ieee802154_dgram_prot; |
| ops = &ieee802154_dgram_ops; |
| break; |
| default: |
| rc = -ESOCKTNOSUPPORT; |
| goto out; |
| } |
| |
| rc = -ENOMEM; |
| sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto); |
| if (!sk) |
| goto out; |
| rc = 0; |
| |
| sock->ops = ops; |
| |
| sock_init_data(sock, sk); |
| /* FIXME: sk->sk_destruct */ |
| sk->sk_family = PF_IEEE802154; |
| |
| /* Checksums on by default */ |
| sock_set_flag(sk, SOCK_ZAPPED); |
| |
| if (sk->sk_prot->hash) |
| sk->sk_prot->hash(sk); |
| |
| if (sk->sk_prot->init) { |
| rc = sk->sk_prot->init(sk); |
| if (rc) |
| sk_common_release(sk); |
| } |
| out: |
| return rc; |
| } |
| |
| static const struct net_proto_family ieee802154_family_ops = { |
| .family = PF_IEEE802154, |
| .create = ieee802154_create, |
| .owner = THIS_MODULE, |
| }; |
| |
| static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, |
| struct packet_type *pt, struct net_device *orig_dev) |
| { |
| if (!netif_running(dev)) |
| goto drop; |
| pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
| #ifdef DEBUG |
| print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len); |
| #endif |
| |
| if (!net_eq(dev_net(dev), &init_net)) |
| goto drop; |
| |
| ieee802154_raw_deliver(dev, skb); |
| |
| if (dev->type != ARPHRD_IEEE802154) |
| goto drop; |
| |
| if (skb->pkt_type != PACKET_OTHERHOST) |
| return ieee802154_dgram_deliver(dev, skb); |
| |
| drop: |
| kfree_skb(skb); |
| return NET_RX_DROP; |
| } |
| |
| |
| static struct packet_type ieee802154_packet_type = { |
| .type = htons(ETH_P_IEEE802154), |
| .func = ieee802154_rcv, |
| }; |
| |
| static int __init af_ieee802154_init(void) |
| { |
| int rc = -EINVAL; |
| |
| rc = proto_register(&ieee802154_raw_prot, 1); |
| if (rc) |
| goto out; |
| |
| rc = proto_register(&ieee802154_dgram_prot, 1); |
| if (rc) |
| goto err_dgram; |
| |
| /* Tell SOCKET that we are alive */ |
| rc = sock_register(&ieee802154_family_ops); |
| if (rc) |
| goto err_sock; |
| dev_add_pack(&ieee802154_packet_type); |
| |
| rc = 0; |
| goto out; |
| |
| err_sock: |
| proto_unregister(&ieee802154_dgram_prot); |
| err_dgram: |
| proto_unregister(&ieee802154_raw_prot); |
| out: |
| return rc; |
| } |
| static void __exit af_ieee802154_remove(void) |
| { |
| dev_remove_pack(&ieee802154_packet_type); |
| sock_unregister(PF_IEEE802154); |
| proto_unregister(&ieee802154_dgram_prot); |
| proto_unregister(&ieee802154_raw_prot); |
| } |
| |
| module_init(af_ieee802154_init); |
| module_exit(af_ieee802154_remove); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_NETPROTO(PF_IEEE802154); |