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![David Howells](/assets/img/avatar_default.png)
Remove ->sendpage() and ->sendpage_locked(). sendmsg() with MSG_SPLICE_PAGES should be used instead. This allows multiple pages and multipage folios to be passed through. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for net/can cc: Jens Axboe <axboe@kernel.dk> cc: Matthew Wilcox <willy@infradead.org> cc: linux-afs@lists.infradead.org cc: mptcp@lists.linux.dev cc: rds-devel@oss.oracle.com cc: tipc-discussion@lists.sourceforge.net cc: virtualization@lists.linux-foundation.org Link: https://lore.kernel.org/r/20230623225513.2732256-16-dhowells@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
1140 lines
23 KiB
C
1140 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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* 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 <linux/socket.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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/* Utility function for families */
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static struct net_device*
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ieee802154_get_dev(struct net *net, const 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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__le16 pan_id, short_addr;
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u8 hwaddr[IEEE802154_ADDR_LEN];
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switch (addr->mode) {
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case IEEE802154_ADDR_LONG:
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ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr);
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rcu_read_lock();
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dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr);
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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 == cpu_to_le16(IEEE802154_PANID_BROADCAST) ||
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addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
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addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST))
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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 = tmp->ieee802154_ptr->pan_id;
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short_addr = tmp->ieee802154_ptr->short_addr;
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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_warn("Unsupported ieee802154 address type: %d\n",
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addr->mode);
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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 socket *sock, struct msghdr *msg,
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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(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 (get_user_ifreq(&ifr, NULL, arg))
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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 && put_user_ifreq(&ifr, arg))
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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 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_ioctl(sk, cmd, (void __user *)arg);
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}
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}
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/* RAW Sockets (802.15.4 created in userspace) */
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static HLIST_HEAD(raw_head);
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static DEFINE_RWLOCK(raw_lock);
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static int raw_hash(struct sock *sk)
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{
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write_lock_bh(&raw_lock);
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sk_add_node(sk, &raw_head);
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write_unlock_bh(&raw_lock);
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sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
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return 0;
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}
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static void raw_unhash(struct sock *sk)
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{
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write_lock_bh(&raw_lock);
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if (sk_del_node_init(sk))
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sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
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write_unlock_bh(&raw_lock);
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}
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static void raw_close(struct sock *sk, long timeout)
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{
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sk_common_release(sk);
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}
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static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len)
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{
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struct ieee802154_addr addr;
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struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr;
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int err = 0;
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struct net_device *dev = NULL;
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err = ieee802154_sockaddr_check_size(uaddr, len);
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if (err < 0)
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return err;
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uaddr = (struct sockaddr_ieee802154 *)_uaddr;
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if (uaddr->family != AF_IEEE802154)
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return -EINVAL;
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lock_sock(sk);
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ieee802154_addr_from_sa(&addr, &uaddr->addr);
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dev = ieee802154_get_dev(sock_net(sk), &addr);
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if (!dev) {
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err = -ENODEV;
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goto out;
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}
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sk->sk_bound_dev_if = dev->ifindex;
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sk_dst_reset(sk);
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dev_put(dev);
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out:
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release_sock(sk);
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return err;
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}
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static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
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int addr_len)
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{
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return -ENOTSUPP;
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}
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static int raw_disconnect(struct sock *sk, int flags)
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{
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return 0;
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}
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static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
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{
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struct net_device *dev;
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unsigned int mtu;
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struct sk_buff *skb;
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int hlen, tlen;
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int err;
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if (msg->msg_flags & MSG_OOB) {
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pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
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return -EOPNOTSUPP;
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}
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lock_sock(sk);
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if (!sk->sk_bound_dev_if)
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dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
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else
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dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
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release_sock(sk);
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if (!dev) {
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pr_debug("no dev\n");
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err = -ENXIO;
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goto out;
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}
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mtu = IEEE802154_MTU;
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pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
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if (size > mtu) {
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pr_debug("size = %zu, mtu = %u\n", size, mtu);
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err = -EMSGSIZE;
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goto out_dev;
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}
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if (!size) {
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err = 0;
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goto out_dev;
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}
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hlen = LL_RESERVED_SPACE(dev);
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tlen = dev->needed_tailroom;
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skb = sock_alloc_send_skb(sk, hlen + tlen + size,
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msg->msg_flags & MSG_DONTWAIT, &err);
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if (!skb)
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goto out_dev;
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skb_reserve(skb, hlen);
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skb_reset_mac_header(skb);
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skb_reset_network_header(skb);
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err = memcpy_from_msg(skb_put(skb, size), msg, size);
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if (err < 0)
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goto out_skb;
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skb->dev = dev;
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skb->protocol = htons(ETH_P_IEEE802154);
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err = dev_queue_xmit(skb);
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if (err > 0)
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err = net_xmit_errno(err);
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dev_put(dev);
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return err ?: size;
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out_skb:
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kfree_skb(skb);
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out_dev:
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dev_put(dev);
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out:
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return err;
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}
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static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
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int flags, int *addr_len)
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{
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size_t copied = 0;
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int err = -EOPNOTSUPP;
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struct sk_buff *skb;
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skb = skb_recv_datagram(sk, flags, &err);
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if (!skb)
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goto out;
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copied = skb->len;
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if (len < copied) {
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msg->msg_flags |= MSG_TRUNC;
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copied = len;
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}
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err = skb_copy_datagram_msg(skb, 0, msg, copied);
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if (err)
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goto done;
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sock_recv_cmsgs(msg, sk, skb);
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if (flags & MSG_TRUNC)
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copied = skb->len;
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done:
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skb_free_datagram(sk, skb);
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out:
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if (err)
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return err;
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return copied;
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}
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static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
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{
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (!skb)
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return NET_RX_DROP;
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if (sock_queue_rcv_skb(sk, skb) < 0) {
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kfree_skb(skb);
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return NET_RX_DROP;
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}
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return NET_RX_SUCCESS;
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}
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static void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
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{
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struct sock *sk;
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read_lock(&raw_lock);
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sk_for_each(sk, &raw_head) {
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bh_lock_sock(sk);
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if (!sk->sk_bound_dev_if ||
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sk->sk_bound_dev_if == dev->ifindex) {
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struct sk_buff *clone;
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clone = skb_clone(skb, GFP_ATOMIC);
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if (clone)
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raw_rcv_skb(sk, clone);
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}
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bh_unlock_sock(sk);
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}
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read_unlock(&raw_lock);
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}
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|
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static int raw_getsockopt(struct sock *sk, int level, int optname,
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char __user *optval, int __user *optlen)
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{
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return -EOPNOTSUPP;
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}
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|
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static int raw_setsockopt(struct sock *sk, int level, int optname,
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sockptr_t optval, unsigned int optlen)
|
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{
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return -EOPNOTSUPP;
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}
|
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|
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static struct proto ieee802154_raw_prot = {
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.name = "IEEE-802.15.4-RAW",
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.owner = THIS_MODULE,
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.obj_size = sizeof(struct sock),
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.close = raw_close,
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.bind = raw_bind,
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.sendmsg = raw_sendmsg,
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.recvmsg = raw_recvmsg,
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.hash = raw_hash,
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.unhash = raw_unhash,
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.connect = raw_connect,
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.disconnect = raw_disconnect,
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.getsockopt = raw_getsockopt,
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.setsockopt = raw_setsockopt,
|
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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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.gettstamp = sock_gettstamp,
|
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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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};
|
|
|
|
/* DGRAM Sockets (802.15.4 dataframes) */
|
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static HLIST_HEAD(dgram_head);
|
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static DEFINE_RWLOCK(dgram_lock);
|
|
|
|
struct dgram_sock {
|
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struct sock sk;
|
|
|
|
struct ieee802154_addr src_addr;
|
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struct ieee802154_addr dst_addr;
|
|
|
|
unsigned int bound:1;
|
|
unsigned int connected:1;
|
|
unsigned int want_ack:1;
|
|
unsigned int want_lqi:1;
|
|
unsigned int secen:1;
|
|
unsigned int secen_override:1;
|
|
unsigned int seclevel:3;
|
|
unsigned int seclevel_override:1;
|
|
};
|
|
|
|
static inline struct dgram_sock *dgram_sk(const struct sock *sk)
|
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{
|
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return container_of(sk, struct dgram_sock, sk);
|
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}
|
|
|
|
static int dgram_hash(struct sock *sk)
|
|
{
|
|
write_lock_bh(&dgram_lock);
|
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sk_add_node(sk, &dgram_head);
|
|
write_unlock_bh(&dgram_lock);
|
|
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dgram_unhash(struct sock *sk)
|
|
{
|
|
write_lock_bh(&dgram_lock);
|
|
if (sk_del_node_init(sk))
|
|
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
|
|
write_unlock_bh(&dgram_lock);
|
|
}
|
|
|
|
static int dgram_init(struct sock *sk)
|
|
{
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
|
|
ro->want_ack = 1;
|
|
ro->want_lqi = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void dgram_close(struct sock *sk, long timeout)
|
|
{
|
|
sk_common_release(sk);
|
|
}
|
|
|
|
static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len)
|
|
{
|
|
struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
|
|
struct ieee802154_addr haddr;
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
int err = -EINVAL;
|
|
struct net_device *dev;
|
|
|
|
lock_sock(sk);
|
|
|
|
ro->bound = 0;
|
|
|
|
err = ieee802154_sockaddr_check_size(addr, len);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
if (addr->family != AF_IEEE802154) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ieee802154_addr_from_sa(&haddr, &addr->addr);
|
|
dev = ieee802154_get_dev(sock_net(sk), &haddr);
|
|
if (!dev) {
|
|
err = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (dev->type != ARPHRD_IEEE802154) {
|
|
err = -ENODEV;
|
|
goto out_put;
|
|
}
|
|
|
|
ro->src_addr = haddr;
|
|
|
|
ro->bound = 1;
|
|
err = 0;
|
|
out_put:
|
|
dev_put(dev);
|
|
out:
|
|
release_sock(sk);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int dgram_ioctl(struct sock *sk, int cmd, int *karg)
|
|
{
|
|
switch (cmd) {
|
|
case SIOCOUTQ:
|
|
{
|
|
*karg = sk_wmem_alloc_get(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
case SIOCINQ:
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
*karg = 0;
|
|
spin_lock_bh(&sk->sk_receive_queue.lock);
|
|
skb = skb_peek(&sk->sk_receive_queue);
|
|
if (skb) {
|
|
/* We will only return the amount
|
|
* of this packet since that is all
|
|
* that will be read.
|
|
*/
|
|
*karg = skb->len - ieee802154_hdr_length(skb);
|
|
}
|
|
spin_unlock_bh(&sk->sk_receive_queue.lock);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
/* FIXME: autobind */
|
|
static int dgram_connect(struct sock *sk, struct sockaddr *uaddr,
|
|
int len)
|
|
{
|
|
struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
int err = 0;
|
|
|
|
err = ieee802154_sockaddr_check_size(addr, len);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (addr->family != AF_IEEE802154)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (!ro->bound) {
|
|
err = -ENETUNREACH;
|
|
goto out;
|
|
}
|
|
|
|
ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr);
|
|
ro->connected = 1;
|
|
|
|
out:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int dgram_disconnect(struct sock *sk, int flags)
|
|
{
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
|
|
lock_sock(sk);
|
|
ro->connected = 0;
|
|
release_sock(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dgram_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
|
|
{
|
|
struct net_device *dev;
|
|
unsigned int mtu;
|
|
struct sk_buff *skb;
|
|
struct ieee802154_mac_cb *cb;
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
struct ieee802154_addr dst_addr;
|
|
DECLARE_SOCKADDR(struct sockaddr_ieee802154*, daddr, msg->msg_name);
|
|
int hlen, tlen;
|
|
int err;
|
|
|
|
if (msg->msg_flags & MSG_OOB) {
|
|
pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (msg->msg_name) {
|
|
if (ro->connected)
|
|
return -EISCONN;
|
|
if (msg->msg_namelen < IEEE802154_MIN_NAMELEN)
|
|
return -EINVAL;
|
|
err = ieee802154_sockaddr_check_size(daddr, msg->msg_namelen);
|
|
if (err < 0)
|
|
return err;
|
|
ieee802154_addr_from_sa(&dst_addr, &daddr->addr);
|
|
} else {
|
|
if (!ro->connected)
|
|
return -EDESTADDRREQ;
|
|
dst_addr = ro->dst_addr;
|
|
}
|
|
|
|
if (!ro->bound)
|
|
dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
|
|
else
|
|
dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);
|
|
|
|
if (!dev) {
|
|
pr_debug("no dev\n");
|
|
err = -ENXIO;
|
|
goto out;
|
|
}
|
|
mtu = IEEE802154_MTU;
|
|
pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
|
|
|
|
if (size > mtu) {
|
|
pr_debug("size = %zu, mtu = %u\n", size, mtu);
|
|
err = -EMSGSIZE;
|
|
goto out_dev;
|
|
}
|
|
|
|
hlen = LL_RESERVED_SPACE(dev);
|
|
tlen = dev->needed_tailroom;
|
|
skb = sock_alloc_send_skb(sk, hlen + tlen + size,
|
|
msg->msg_flags & MSG_DONTWAIT,
|
|
&err);
|
|
if (!skb)
|
|
goto out_dev;
|
|
|
|
skb_reserve(skb, hlen);
|
|
|
|
skb_reset_network_header(skb);
|
|
|
|
cb = mac_cb_init(skb);
|
|
cb->type = IEEE802154_FC_TYPE_DATA;
|
|
cb->ackreq = ro->want_ack;
|
|
cb->secen = ro->secen;
|
|
cb->secen_override = ro->secen_override;
|
|
cb->seclevel = ro->seclevel;
|
|
cb->seclevel_override = ro->seclevel_override;
|
|
|
|
err = wpan_dev_hard_header(skb, dev, &dst_addr,
|
|
ro->bound ? &ro->src_addr : NULL, size);
|
|
if (err < 0)
|
|
goto out_skb;
|
|
|
|
err = memcpy_from_msg(skb_put(skb, size), msg, size);
|
|
if (err < 0)
|
|
goto out_skb;
|
|
|
|
skb->dev = dev;
|
|
skb->protocol = htons(ETH_P_IEEE802154);
|
|
|
|
err = dev_queue_xmit(skb);
|
|
if (err > 0)
|
|
err = net_xmit_errno(err);
|
|
|
|
dev_put(dev);
|
|
|
|
return err ?: size;
|
|
|
|
out_skb:
|
|
kfree_skb(skb);
|
|
out_dev:
|
|
dev_put(dev);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
|
|
int flags, int *addr_len)
|
|
{
|
|
size_t copied = 0;
|
|
int err = -EOPNOTSUPP;
|
|
struct sk_buff *skb;
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name);
|
|
|
|
skb = skb_recv_datagram(sk, flags, &err);
|
|
if (!skb)
|
|
goto out;
|
|
|
|
copied = skb->len;
|
|
if (len < copied) {
|
|
msg->msg_flags |= MSG_TRUNC;
|
|
copied = len;
|
|
}
|
|
|
|
/* FIXME: skip headers if necessary ?! */
|
|
err = skb_copy_datagram_msg(skb, 0, msg, copied);
|
|
if (err)
|
|
goto done;
|
|
|
|
sock_recv_cmsgs(msg, sk, skb);
|
|
|
|
if (saddr) {
|
|
/* Clear the implicit padding in struct sockaddr_ieee802154
|
|
* (16 bits between 'family' and 'addr') and in struct
|
|
* ieee802154_addr_sa (16 bits at the end of the structure).
|
|
*/
|
|
memset(saddr, 0, sizeof(*saddr));
|
|
|
|
saddr->family = AF_IEEE802154;
|
|
ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source);
|
|
*addr_len = sizeof(*saddr);
|
|
}
|
|
|
|
if (ro->want_lqi) {
|
|
err = put_cmsg(msg, SOL_IEEE802154, WPAN_WANTLQI,
|
|
sizeof(uint8_t), &(mac_cb(skb)->lqi));
|
|
if (err)
|
|
goto done;
|
|
}
|
|
|
|
if (flags & MSG_TRUNC)
|
|
copied = skb->len;
|
|
done:
|
|
skb_free_datagram(sk, skb);
|
|
out:
|
|
if (err)
|
|
return err;
|
|
return copied;
|
|
}
|
|
|
|
static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
skb = skb_share_check(skb, GFP_ATOMIC);
|
|
if (!skb)
|
|
return NET_RX_DROP;
|
|
|
|
if (sock_queue_rcv_skb(sk, skb) < 0) {
|
|
kfree_skb(skb);
|
|
return NET_RX_DROP;
|
|
}
|
|
|
|
return NET_RX_SUCCESS;
|
|
}
|
|
|
|
static inline bool
|
|
ieee802154_match_sock(__le64 hw_addr, __le16 pan_id, __le16 short_addr,
|
|
struct dgram_sock *ro)
|
|
{
|
|
if (!ro->bound)
|
|
return true;
|
|
|
|
if (ro->src_addr.mode == IEEE802154_ADDR_LONG &&
|
|
hw_addr == ro->src_addr.extended_addr)
|
|
return true;
|
|
|
|
if (ro->src_addr.mode == IEEE802154_ADDR_SHORT &&
|
|
pan_id == ro->src_addr.pan_id &&
|
|
short_addr == ro->src_addr.short_addr)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb)
|
|
{
|
|
struct sock *sk, *prev = NULL;
|
|
int ret = NET_RX_SUCCESS;
|
|
__le16 pan_id, short_addr;
|
|
__le64 hw_addr;
|
|
|
|
/* Data frame processing */
|
|
BUG_ON(dev->type != ARPHRD_IEEE802154);
|
|
|
|
pan_id = dev->ieee802154_ptr->pan_id;
|
|
short_addr = dev->ieee802154_ptr->short_addr;
|
|
hw_addr = dev->ieee802154_ptr->extended_addr;
|
|
|
|
read_lock(&dgram_lock);
|
|
sk_for_each(sk, &dgram_head) {
|
|
if (ieee802154_match_sock(hw_addr, pan_id, short_addr,
|
|
dgram_sk(sk))) {
|
|
if (prev) {
|
|
struct sk_buff *clone;
|
|
|
|
clone = skb_clone(skb, GFP_ATOMIC);
|
|
if (clone)
|
|
dgram_rcv_skb(prev, clone);
|
|
}
|
|
|
|
prev = sk;
|
|
}
|
|
}
|
|
|
|
if (prev) {
|
|
dgram_rcv_skb(prev, skb);
|
|
} else {
|
|
kfree_skb(skb);
|
|
ret = NET_RX_DROP;
|
|
}
|
|
read_unlock(&dgram_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dgram_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
|
|
int val, len;
|
|
|
|
if (level != SOL_IEEE802154)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
len = min_t(unsigned int, len, sizeof(int));
|
|
|
|
switch (optname) {
|
|
case WPAN_WANTACK:
|
|
val = ro->want_ack;
|
|
break;
|
|
case WPAN_WANTLQI:
|
|
val = ro->want_lqi;
|
|
break;
|
|
case WPAN_SECURITY:
|
|
if (!ro->secen_override)
|
|
val = WPAN_SECURITY_DEFAULT;
|
|
else if (ro->secen)
|
|
val = WPAN_SECURITY_ON;
|
|
else
|
|
val = WPAN_SECURITY_OFF;
|
|
break;
|
|
case WPAN_SECURITY_LEVEL:
|
|
if (!ro->seclevel_override)
|
|
val = WPAN_SECURITY_LEVEL_DEFAULT;
|
|
else
|
|
val = ro->seclevel;
|
|
break;
|
|
default:
|
|
return -ENOPROTOOPT;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int dgram_setsockopt(struct sock *sk, int level, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
struct dgram_sock *ro = dgram_sk(sk);
|
|
struct net *net = sock_net(sk);
|
|
int val;
|
|
int err = 0;
|
|
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_sockptr(&val, optval, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case WPAN_WANTACK:
|
|
ro->want_ack = !!val;
|
|
break;
|
|
case WPAN_WANTLQI:
|
|
ro->want_lqi = !!val;
|
|
break;
|
|
case WPAN_SECURITY:
|
|
if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
|
|
!ns_capable(net->user_ns, CAP_NET_RAW)) {
|
|
err = -EPERM;
|
|
break;
|
|
}
|
|
|
|
switch (val) {
|
|
case WPAN_SECURITY_DEFAULT:
|
|
ro->secen_override = 0;
|
|
break;
|
|
case WPAN_SECURITY_ON:
|
|
ro->secen_override = 1;
|
|
ro->secen = 1;
|
|
break;
|
|
case WPAN_SECURITY_OFF:
|
|
ro->secen_override = 1;
|
|
ro->secen = 0;
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
break;
|
|
case WPAN_SECURITY_LEVEL:
|
|
if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
|
|
!ns_capable(net->user_ns, CAP_NET_RAW)) {
|
|
err = -EPERM;
|
|
break;
|
|
}
|
|
|
|
if (val < WPAN_SECURITY_LEVEL_DEFAULT ||
|
|
val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) {
|
|
err = -EINVAL;
|
|
} else if (val == WPAN_SECURITY_LEVEL_DEFAULT) {
|
|
ro->seclevel_override = 0;
|
|
} else {
|
|
ro->seclevel_override = 1;
|
|
ro->seclevel = val;
|
|
}
|
|
break;
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static struct proto ieee802154_dgram_prot = {
|
|
.name = "IEEE-802.15.4-MAC",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct dgram_sock),
|
|
.init = dgram_init,
|
|
.close = dgram_close,
|
|
.bind = dgram_bind,
|
|
.sendmsg = dgram_sendmsg,
|
|
.recvmsg = dgram_recvmsg,
|
|
.hash = dgram_hash,
|
|
.unhash = dgram_unhash,
|
|
.connect = dgram_connect,
|
|
.disconnect = dgram_disconnect,
|
|
.ioctl = dgram_ioctl,
|
|
.getsockopt = dgram_getsockopt,
|
|
.setsockopt = dgram_setsockopt,
|
|
};
|
|
|
|
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,
|
|
.gettstamp = sock_gettstamp,
|
|
.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,
|
|
};
|
|
|
|
static void ieee802154_sock_destruct(struct sock *sk)
|
|
{
|
|
skb_queue_purge(&sk->sk_receive_queue);
|
|
}
|
|
|
|
/* 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:
|
|
rc = -EPERM;
|
|
if (!capable(CAP_NET_RAW))
|
|
goto out;
|
|
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, kern);
|
|
if (!sk)
|
|
goto out;
|
|
rc = 0;
|
|
|
|
sock->ops = ops;
|
|
|
|
sock_init_data(sock, sk);
|
|
sk->sk_destruct = ieee802154_sock_destruct;
|
|
sk->sk_family = PF_IEEE802154;
|
|
|
|
/* Checksums on by default */
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
|
|
if (sk->sk_prot->hash) {
|
|
rc = sk->sk_prot->hash(sk);
|
|
if (rc) {
|
|
sk_common_release(sk);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
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);
|