ieee802154_6lowpan-y := 6lowpan_rtnl.o reassembly.o
ieee802154-y := netlink.o nl-mac.o nl-phy.o nl_policy.o core.o \
header_ops.o sysfs.o nl802154.o
-ieee802154_socket-y := af_ieee802154.o
+ieee802154_socket-y := socket.o
ccflags-y += -D__CHECK_ENDIAN__
+++ /dev/null
-/*
- * 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.
- *
- * 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>
-
-/* Utility function for families */
-static 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_warn("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);
- }
-}
-
-/* RAW Sockets (802.15.4 created in userspace) */
-static HLIST_HEAD(raw_head);
-static DEFINE_RWLOCK(raw_lock);
-
-static void raw_hash(struct sock *sk)
-{
- write_lock_bh(&raw_lock);
- sk_add_node(sk, &raw_head);
- sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
- write_unlock_bh(&raw_lock);
-}
-
-static void raw_unhash(struct sock *sk)
-{
- write_lock_bh(&raw_lock);
- if (sk_del_node_init(sk))
- sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
- write_unlock_bh(&raw_lock);
-}
-
-static void raw_close(struct sock *sk, long timeout)
-{
- sk_common_release(sk);
-}
-
-static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len)
-{
- struct ieee802154_addr addr;
- struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr;
- int err = 0;
- struct net_device *dev = NULL;
-
- if (len < sizeof(*uaddr))
- return -EINVAL;
-
- uaddr = (struct sockaddr_ieee802154 *)_uaddr;
- if (uaddr->family != AF_IEEE802154)
- return -EINVAL;
-
- lock_sock(sk);
-
- ieee802154_addr_from_sa(&addr, &uaddr->addr);
- dev = ieee802154_get_dev(sock_net(sk), &addr);
- if (!dev) {
- err = -ENODEV;
- goto out;
- }
-
- if (dev->type != ARPHRD_IEEE802154) {
- err = -ENODEV;
- goto out_put;
- }
-
- sk->sk_bound_dev_if = dev->ifindex;
- sk_dst_reset(sk);
-
-out_put:
- dev_put(dev);
-out:
- release_sock(sk);
-
- return err;
-}
-
-static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
- int addr_len)
-{
- return -ENOTSUPP;
-}
-
-static int raw_disconnect(struct sock *sk, int flags)
-{
- return 0;
-}
-
-static int raw_sendmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t size)
-{
- struct net_device *dev;
- unsigned int mtu;
- struct sk_buff *skb;
- int hlen, tlen;
- int err;
-
- if (msg->msg_flags & MSG_OOB) {
- pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
- return -EOPNOTSUPP;
- }
-
- lock_sock(sk);
- if (!sk->sk_bound_dev_if)
- dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
- else
- dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
- release_sock(sk);
-
- if (!dev) {
- pr_debug("no dev\n");
- err = -ENXIO;
- goto out;
- }
-
- mtu = dev->mtu;
- pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
-
- if (size > mtu) {
- pr_debug("size = %Zu, mtu = %u\n", size, mtu);
- err = -EINVAL;
- 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_mac_header(skb);
- skb_reset_network_header(skb);
-
- err = memcpy_from_msg(skb_put(skb, size), msg, size);
- if (err < 0)
- goto out_skb;
-
- skb->dev = dev;
- skb->sk = sk;
- skb->protocol = htons(ETH_P_IEEE802154);
-
- dev_put(dev);
-
- err = dev_queue_xmit(skb);
- if (err > 0)
- err = net_xmit_errno(err);
-
- return err ?: size;
-
-out_skb:
- kfree_skb(skb);
-out_dev:
- dev_put(dev);
-out:
- return err;
-}
-
-static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
- size_t len, int noblock, int flags, int *addr_len)
-{
- size_t copied = 0;
- int err = -EOPNOTSUPP;
- struct sk_buff *skb;
-
- skb = skb_recv_datagram(sk, flags, noblock, &err);
- if (!skb)
- goto out;
-
- copied = skb->len;
- if (len < copied) {
- msg->msg_flags |= MSG_TRUNC;
- copied = len;
- }
-
- err = skb_copy_datagram_msg(skb, 0, msg, copied);
- if (err)
- goto done;
-
- sock_recv_ts_and_drops(msg, sk, skb);
-
- if (flags & MSG_TRUNC)
- copied = skb->len;
-done:
- skb_free_datagram(sk, skb);
-out:
- if (err)
- return err;
- return copied;
-}
-
-static int raw_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 void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
-{
- struct sock *sk;
-
- read_lock(&raw_lock);
- sk_for_each(sk, &raw_head) {
- bh_lock_sock(sk);
- if (!sk->sk_bound_dev_if ||
- sk->sk_bound_dev_if == dev->ifindex) {
- struct sk_buff *clone;
-
- clone = skb_clone(skb, GFP_ATOMIC);
- if (clone)
- raw_rcv_skb(sk, clone);
- }
- bh_unlock_sock(sk);
- }
- read_unlock(&raw_lock);
-}
-
-static int raw_getsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- return -EOPNOTSUPP;
-}
-
-static int raw_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, unsigned int optlen)
-{
- return -EOPNOTSUPP;
-}
-
-static struct proto ieee802154_raw_prot = {
- .name = "IEEE-802.15.4-RAW",
- .owner = THIS_MODULE,
- .obj_size = sizeof(struct sock),
- .close = raw_close,
- .bind = raw_bind,
- .sendmsg = raw_sendmsg,
- .recvmsg = raw_recvmsg,
- .hash = raw_hash,
- .unhash = raw_unhash,
- .connect = raw_connect,
- .disconnect = raw_disconnect,
- .getsockopt = raw_getsockopt,
- .setsockopt = raw_setsockopt,
-};
-
-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
-};
-
-/* DGRAM Sockets (802.15.4 dataframes) */
-static HLIST_HEAD(dgram_head);
-static DEFINE_RWLOCK(dgram_lock);
-
-struct dgram_sock {
- struct sock sk;
-
- struct ieee802154_addr src_addr;
- struct ieee802154_addr dst_addr;
-
- unsigned int bound:1;
- unsigned int connected:1;
- unsigned int want_ack: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)
-{
- return container_of(sk, struct dgram_sock, sk);
-}
-
-static void dgram_hash(struct sock *sk)
-{
- write_lock_bh(&dgram_lock);
- sk_add_node(sk, &dgram_head);
- sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
- write_unlock_bh(&dgram_lock);
-}
-
-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;
- 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;
-
- if (len < sizeof(*addr))
- goto out;
-
- if (addr->family != AF_IEEE802154)
- 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, unsigned long arg)
-{
- switch (cmd) {
- case SIOCOUTQ:
- {
- int amount = sk_wmem_alloc_get(sk);
-
- return put_user(amount, (int __user *)arg);
- }
-
- case SIOCINQ:
- {
- struct sk_buff *skb;
- unsigned long amount;
-
- amount = 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.
- */
- amount = skb->len - ieee802154_hdr_length(skb);
- }
- spin_unlock_bh(&sk->sk_receive_queue.lock);
- return put_user(amount, (int __user *)arg);
- }
- }
-
- 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;
-
- if (len < sizeof(*addr))
- return -EINVAL;
-
- 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 kiocb *iocb, 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;
- 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 (!ro->connected && !msg->msg_name)
- return -EDESTADDRREQ;
- else if (ro->connected && msg->msg_name)
- return -EISCONN;
-
- 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 = dev->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;
-
- if (msg->msg_name) {
- DECLARE_SOCKADDR(struct sockaddr_ieee802154*,
- daddr, msg->msg_name);
-
- ieee802154_addr_from_sa(&dst_addr, &daddr->addr);
- } else {
- dst_addr = ro->dst_addr;
- }
-
- cb->secen = ro->secen;
- cb->secen_override = ro->secen_override;
- cb->seclevel = ro->seclevel;
- cb->seclevel_override = ro->seclevel_override;
-
- err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &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->sk = sk;
- skb->protocol = htons(ETH_P_IEEE802154);
-
- dev_put(dev);
-
- err = dev_queue_xmit(skb);
- if (err > 0)
- err = net_xmit_errno(err);
-
- return err ?: size;
-
-out_skb:
- kfree_skb(skb);
-out_dev:
- dev_put(dev);
-out:
- return err;
-}
-
-static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len, int noblock,
- int flags, int *addr_len)
-{
- size_t copied = 0;
- int err = -EOPNOTSUPP;
- struct sk_buff *skb;
- DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name);
-
- skb = skb_recv_datagram(sk, flags, noblock, &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_ts_and_drops(msg, sk, skb);
-
- if (saddr) {
- saddr->family = AF_IEEE802154;
- ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source);
- *addr_len = sizeof(*saddr);
- }
-
- 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 = ieee802154_mlme_ops(dev)->get_pan_id(dev);
- short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);
- hw_addr = ieee802154_devaddr_from_raw(dev->dev_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_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,
- char __user *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 (get_user(val, (int __user *)optval))
- return -EFAULT;
-
- lock_sock(sk);
-
- switch (optname) {
- case WPAN_WANTACK:
- ro->want_ack = !!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,
- .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);
--- /dev/null
+/*
+ * 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.
+ *
+ * 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>
+
+/* Utility function for families */
+static 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_warn("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);
+ }
+}
+
+/* RAW Sockets (802.15.4 created in userspace) */
+static HLIST_HEAD(raw_head);
+static DEFINE_RWLOCK(raw_lock);
+
+static void raw_hash(struct sock *sk)
+{
+ write_lock_bh(&raw_lock);
+ sk_add_node(sk, &raw_head);
+ sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+ write_unlock_bh(&raw_lock);
+}
+
+static void raw_unhash(struct sock *sk)
+{
+ write_lock_bh(&raw_lock);
+ if (sk_del_node_init(sk))
+ sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
+ write_unlock_bh(&raw_lock);
+}
+
+static void raw_close(struct sock *sk, long timeout)
+{
+ sk_common_release(sk);
+}
+
+static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len)
+{
+ struct ieee802154_addr addr;
+ struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr;
+ int err = 0;
+ struct net_device *dev = NULL;
+
+ if (len < sizeof(*uaddr))
+ return -EINVAL;
+
+ uaddr = (struct sockaddr_ieee802154 *)_uaddr;
+ if (uaddr->family != AF_IEEE802154)
+ return -EINVAL;
+
+ lock_sock(sk);
+
+ ieee802154_addr_from_sa(&addr, &uaddr->addr);
+ dev = ieee802154_get_dev(sock_net(sk), &addr);
+ if (!dev) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ if (dev->type != ARPHRD_IEEE802154) {
+ err = -ENODEV;
+ goto out_put;
+ }
+
+ sk->sk_bound_dev_if = dev->ifindex;
+ sk_dst_reset(sk);
+
+out_put:
+ dev_put(dev);
+out:
+ release_sock(sk);
+
+ return err;
+}
+
+static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
+ int addr_len)
+{
+ return -ENOTSUPP;
+}
+
+static int raw_disconnect(struct sock *sk, int flags)
+{
+ return 0;
+}
+
+static int raw_sendmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t size)
+{
+ struct net_device *dev;
+ unsigned int mtu;
+ struct sk_buff *skb;
+ int hlen, tlen;
+ int err;
+
+ if (msg->msg_flags & MSG_OOB) {
+ pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
+ return -EOPNOTSUPP;
+ }
+
+ lock_sock(sk);
+ if (!sk->sk_bound_dev_if)
+ dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
+ else
+ dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
+ release_sock(sk);
+
+ if (!dev) {
+ pr_debug("no dev\n");
+ err = -ENXIO;
+ goto out;
+ }
+
+ mtu = dev->mtu;
+ pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
+
+ if (size > mtu) {
+ pr_debug("size = %Zu, mtu = %u\n", size, mtu);
+ err = -EINVAL;
+ 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_mac_header(skb);
+ skb_reset_network_header(skb);
+
+ err = memcpy_from_msg(skb_put(skb, size), msg, size);
+ if (err < 0)
+ goto out_skb;
+
+ skb->dev = dev;
+ skb->sk = sk;
+ skb->protocol = htons(ETH_P_IEEE802154);
+
+ dev_put(dev);
+
+ err = dev_queue_xmit(skb);
+ if (err > 0)
+ err = net_xmit_errno(err);
+
+ return err ?: size;
+
+out_skb:
+ kfree_skb(skb);
+out_dev:
+ dev_put(dev);
+out:
+ return err;
+}
+
+static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+ size_t len, int noblock, int flags, int *addr_len)
+{
+ size_t copied = 0;
+ int err = -EOPNOTSUPP;
+ struct sk_buff *skb;
+
+ skb = skb_recv_datagram(sk, flags, noblock, &err);
+ if (!skb)
+ goto out;
+
+ copied = skb->len;
+ if (len < copied) {
+ msg->msg_flags |= MSG_TRUNC;
+ copied = len;
+ }
+
+ err = skb_copy_datagram_msg(skb, 0, msg, copied);
+ if (err)
+ goto done;
+
+ sock_recv_ts_and_drops(msg, sk, skb);
+
+ if (flags & MSG_TRUNC)
+ copied = skb->len;
+done:
+ skb_free_datagram(sk, skb);
+out:
+ if (err)
+ return err;
+ return copied;
+}
+
+static int raw_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 void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
+{
+ struct sock *sk;
+
+ read_lock(&raw_lock);
+ sk_for_each(sk, &raw_head) {
+ bh_lock_sock(sk);
+ if (!sk->sk_bound_dev_if ||
+ sk->sk_bound_dev_if == dev->ifindex) {
+ struct sk_buff *clone;
+
+ clone = skb_clone(skb, GFP_ATOMIC);
+ if (clone)
+ raw_rcv_skb(sk, clone);
+ }
+ bh_unlock_sock(sk);
+ }
+ read_unlock(&raw_lock);
+}
+
+static int raw_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ return -EOPNOTSUPP;
+}
+
+static int raw_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen)
+{
+ return -EOPNOTSUPP;
+}
+
+static struct proto ieee802154_raw_prot = {
+ .name = "IEEE-802.15.4-RAW",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct sock),
+ .close = raw_close,
+ .bind = raw_bind,
+ .sendmsg = raw_sendmsg,
+ .recvmsg = raw_recvmsg,
+ .hash = raw_hash,
+ .unhash = raw_unhash,
+ .connect = raw_connect,
+ .disconnect = raw_disconnect,
+ .getsockopt = raw_getsockopt,
+ .setsockopt = raw_setsockopt,
+};
+
+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
+};
+
+/* DGRAM Sockets (802.15.4 dataframes) */
+static HLIST_HEAD(dgram_head);
+static DEFINE_RWLOCK(dgram_lock);
+
+struct dgram_sock {
+ struct sock sk;
+
+ struct ieee802154_addr src_addr;
+ struct ieee802154_addr dst_addr;
+
+ unsigned int bound:1;
+ unsigned int connected:1;
+ unsigned int want_ack: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)
+{
+ return container_of(sk, struct dgram_sock, sk);
+}
+
+static void dgram_hash(struct sock *sk)
+{
+ write_lock_bh(&dgram_lock);
+ sk_add_node(sk, &dgram_head);
+ sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+ write_unlock_bh(&dgram_lock);
+}
+
+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;
+ 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;
+
+ if (len < sizeof(*addr))
+ goto out;
+
+ if (addr->family != AF_IEEE802154)
+ 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, unsigned long arg)
+{
+ switch (cmd) {
+ case SIOCOUTQ:
+ {
+ int amount = sk_wmem_alloc_get(sk);
+
+ return put_user(amount, (int __user *)arg);
+ }
+
+ case SIOCINQ:
+ {
+ struct sk_buff *skb;
+ unsigned long amount;
+
+ amount = 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.
+ */
+ amount = skb->len - ieee802154_hdr_length(skb);
+ }
+ spin_unlock_bh(&sk->sk_receive_queue.lock);
+ return put_user(amount, (int __user *)arg);
+ }
+ }
+
+ 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;
+
+ if (len < sizeof(*addr))
+ return -EINVAL;
+
+ 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 kiocb *iocb, 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;
+ 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 (!ro->connected && !msg->msg_name)
+ return -EDESTADDRREQ;
+ else if (ro->connected && msg->msg_name)
+ return -EISCONN;
+
+ 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 = dev->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;
+
+ if (msg->msg_name) {
+ DECLARE_SOCKADDR(struct sockaddr_ieee802154*,
+ daddr, msg->msg_name);
+
+ ieee802154_addr_from_sa(&dst_addr, &daddr->addr);
+ } else {
+ dst_addr = ro->dst_addr;
+ }
+
+ cb->secen = ro->secen;
+ cb->secen_override = ro->secen_override;
+ cb->seclevel = ro->seclevel;
+ cb->seclevel_override = ro->seclevel_override;
+
+ err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &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->sk = sk;
+ skb->protocol = htons(ETH_P_IEEE802154);
+
+ dev_put(dev);
+
+ err = dev_queue_xmit(skb);
+ if (err > 0)
+ err = net_xmit_errno(err);
+
+ return err ?: size;
+
+out_skb:
+ kfree_skb(skb);
+out_dev:
+ dev_put(dev);
+out:
+ return err;
+}
+
+static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len, int noblock,
+ int flags, int *addr_len)
+{
+ size_t copied = 0;
+ int err = -EOPNOTSUPP;
+ struct sk_buff *skb;
+ DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name);
+
+ skb = skb_recv_datagram(sk, flags, noblock, &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_ts_and_drops(msg, sk, skb);
+
+ if (saddr) {
+ saddr->family = AF_IEEE802154;
+ ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source);
+ *addr_len = sizeof(*saddr);
+ }
+
+ 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 = ieee802154_mlme_ops(dev)->get_pan_id(dev);
+ short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);
+ hw_addr = ieee802154_devaddr_from_raw(dev->dev_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_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,
+ char __user *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 (get_user(val, (int __user *)optval))
+ return -EFAULT;
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case WPAN_WANTACK:
+ ro->want_ack = !!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,
+ .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);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff