374 lines
8.6 KiB
C
374 lines
8.6 KiB
C
/*
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* IEEE802154.4 socket interface
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*
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* Copyright 2007, 2008 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Written by:
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* Sergey Lapin <slapin@ossfans.org>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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*/
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#include <linux/net.h>
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#include <linux/capability.h>
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#include <linux/module.h>
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#include <linux/if_arp.h>
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#include <linux/if.h>
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#include <linux/termios.h> /* For TIOCOUTQ/INQ */
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <net/datalink.h>
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#include <net/psnap.h>
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#include <net/sock.h>
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#include <net/tcp_states.h>
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#include <net/route.h>
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#include <net/af_ieee802154.h>
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#include <net/ieee802154_netdev.h>
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#include "af802154.h"
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/*
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* Utility function for families
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*/
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struct net_device *ieee802154_get_dev(struct net *net,
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struct ieee802154_addr *addr)
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{
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struct net_device *dev = NULL;
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struct net_device *tmp;
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u16 pan_id, short_addr;
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switch (addr->addr_type) {
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case IEEE802154_ADDR_LONG:
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rcu_read_lock();
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dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, addr->hwaddr);
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if (dev)
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dev_hold(dev);
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rcu_read_unlock();
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break;
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case IEEE802154_ADDR_SHORT:
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if (addr->pan_id == 0xffff ||
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addr->short_addr == IEEE802154_ADDR_UNDEF ||
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addr->short_addr == 0xffff)
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break;
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rtnl_lock();
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for_each_netdev(net, tmp) {
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if (tmp->type != ARPHRD_IEEE802154)
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continue;
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pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp);
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short_addr =
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ieee802154_mlme_ops(tmp)->get_short_addr(tmp);
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if (pan_id == addr->pan_id &&
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short_addr == addr->short_addr) {
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dev = tmp;
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dev_hold(dev);
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break;
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}
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}
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rtnl_unlock();
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break;
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default:
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pr_warning("Unsupported ieee802154 address type: %d\n",
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addr->addr_type);
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break;
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}
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return dev;
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}
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static int ieee802154_sock_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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if (sk) {
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sock->sk = NULL;
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sk->sk_prot->close(sk, 0);
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}
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return 0;
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}
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static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
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struct msghdr *msg, size_t len)
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{
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struct sock *sk = sock->sk;
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return sk->sk_prot->sendmsg(iocb, sk, msg, len);
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}
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static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr,
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int addr_len)
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{
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struct sock *sk = sock->sk;
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if (sk->sk_prot->bind)
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return sk->sk_prot->bind(sk, uaddr, addr_len);
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return sock_no_bind(sock, uaddr, addr_len);
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}
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static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr,
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int addr_len, int flags)
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{
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struct sock *sk = sock->sk;
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if (addr_len < sizeof(uaddr->sa_family))
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return -EINVAL;
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if (uaddr->sa_family == AF_UNSPEC)
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return sk->sk_prot->disconnect(sk, flags);
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return sk->sk_prot->connect(sk, uaddr, addr_len);
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}
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static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
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unsigned int cmd)
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{
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struct ifreq ifr;
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int ret = -ENOIOCTLCMD;
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struct net_device *dev;
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if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
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return -EFAULT;
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ifr.ifr_name[IFNAMSIZ-1] = 0;
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dev_load(sock_net(sk), ifr.ifr_name);
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dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);
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if (!dev)
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return -ENODEV;
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if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl)
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ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
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if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
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ret = -EFAULT;
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dev_put(dev);
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return ret;
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}
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static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
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unsigned long arg)
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{
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struct sock *sk = sock->sk;
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switch (cmd) {
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case SIOCGSTAMP:
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return sock_get_timestamp(sk, (struct timeval __user *)arg);
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case SIOCGSTAMPNS:
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return sock_get_timestampns(sk, (struct timespec __user *)arg);
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case SIOCGIFADDR:
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case SIOCSIFADDR:
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return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg,
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cmd);
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default:
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if (!sk->sk_prot->ioctl)
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return -ENOIOCTLCMD;
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return sk->sk_prot->ioctl(sk, cmd, arg);
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}
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}
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static const struct proto_ops ieee802154_raw_ops = {
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.family = PF_IEEE802154,
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.owner = THIS_MODULE,
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.release = ieee802154_sock_release,
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.bind = ieee802154_sock_bind,
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.connect = ieee802154_sock_connect,
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.socketpair = sock_no_socketpair,
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.accept = sock_no_accept,
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.getname = sock_no_getname,
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.poll = datagram_poll,
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.ioctl = ieee802154_sock_ioctl,
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.listen = sock_no_listen,
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.shutdown = sock_no_shutdown,
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.setsockopt = sock_common_setsockopt,
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.getsockopt = sock_common_getsockopt,
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.sendmsg = ieee802154_sock_sendmsg,
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.recvmsg = sock_common_recvmsg,
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.mmap = sock_no_mmap,
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.sendpage = sock_no_sendpage,
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#ifdef CONFIG_COMPAT
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.compat_setsockopt = compat_sock_common_setsockopt,
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.compat_getsockopt = compat_sock_common_getsockopt,
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#endif
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};
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static const struct proto_ops ieee802154_dgram_ops = {
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.family = PF_IEEE802154,
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.owner = THIS_MODULE,
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.release = ieee802154_sock_release,
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.bind = ieee802154_sock_bind,
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.connect = ieee802154_sock_connect,
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.socketpair = sock_no_socketpair,
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.accept = sock_no_accept,
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.getname = sock_no_getname,
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.poll = datagram_poll,
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.ioctl = ieee802154_sock_ioctl,
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.listen = sock_no_listen,
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.shutdown = sock_no_shutdown,
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.setsockopt = sock_common_setsockopt,
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.getsockopt = sock_common_getsockopt,
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.sendmsg = ieee802154_sock_sendmsg,
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.recvmsg = sock_common_recvmsg,
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.mmap = sock_no_mmap,
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.sendpage = sock_no_sendpage,
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#ifdef CONFIG_COMPAT
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.compat_setsockopt = compat_sock_common_setsockopt,
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.compat_getsockopt = compat_sock_common_getsockopt,
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#endif
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};
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/*
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* Create a socket. Initialise the socket, blank the addresses
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* set the state.
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*/
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static int ieee802154_create(struct net *net, struct socket *sock,
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int protocol, int kern)
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{
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struct sock *sk;
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int rc;
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struct proto *proto;
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const struct proto_ops *ops;
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if (!net_eq(net, &init_net))
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return -EAFNOSUPPORT;
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switch (sock->type) {
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case SOCK_RAW:
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proto = &ieee802154_raw_prot;
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ops = &ieee802154_raw_ops;
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break;
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case SOCK_DGRAM:
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proto = &ieee802154_dgram_prot;
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ops = &ieee802154_dgram_ops;
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break;
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default:
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rc = -ESOCKTNOSUPPORT;
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goto out;
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}
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rc = -ENOMEM;
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sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto);
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if (!sk)
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goto out;
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rc = 0;
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sock->ops = ops;
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sock_init_data(sock, sk);
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/* FIXME: sk->sk_destruct */
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sk->sk_family = PF_IEEE802154;
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/* Checksums on by default */
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sock_set_flag(sk, SOCK_ZAPPED);
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if (sk->sk_prot->hash)
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sk->sk_prot->hash(sk);
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if (sk->sk_prot->init) {
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rc = sk->sk_prot->init(sk);
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if (rc)
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sk_common_release(sk);
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}
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out:
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return rc;
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}
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static const struct net_proto_family ieee802154_family_ops = {
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.family = PF_IEEE802154,
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.create = ieee802154_create,
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.owner = THIS_MODULE,
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};
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static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *pt, struct net_device *orig_dev)
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{
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if (!netif_running(dev))
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goto drop;
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pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
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#ifdef DEBUG
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print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len);
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#endif
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if (!net_eq(dev_net(dev), &init_net))
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goto drop;
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ieee802154_raw_deliver(dev, skb);
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if (dev->type != ARPHRD_IEEE802154)
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goto drop;
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if (skb->pkt_type != PACKET_OTHERHOST)
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return ieee802154_dgram_deliver(dev, skb);
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drop:
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kfree_skb(skb);
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return NET_RX_DROP;
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}
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static struct packet_type ieee802154_packet_type = {
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.type = __constant_htons(ETH_P_IEEE802154),
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.func = ieee802154_rcv,
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};
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static int __init af_ieee802154_init(void)
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{
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int rc = -EINVAL;
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rc = proto_register(&ieee802154_raw_prot, 1);
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if (rc)
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goto out;
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rc = proto_register(&ieee802154_dgram_prot, 1);
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if (rc)
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goto err_dgram;
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/* Tell SOCKET that we are alive */
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rc = sock_register(&ieee802154_family_ops);
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if (rc)
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goto err_sock;
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dev_add_pack(&ieee802154_packet_type);
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rc = 0;
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goto out;
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err_sock:
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proto_unregister(&ieee802154_dgram_prot);
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err_dgram:
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proto_unregister(&ieee802154_raw_prot);
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out:
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return rc;
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}
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static void __exit af_ieee802154_remove(void)
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{
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dev_remove_pack(&ieee802154_packet_type);
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sock_unregister(PF_IEEE802154);
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proto_unregister(&ieee802154_dgram_prot);
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proto_unregister(&ieee802154_raw_prot);
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}
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module_init(af_ieee802154_init);
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module_exit(af_ieee802154_remove);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_NETPROTO(PF_IEEE802154);
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