ieee802154: socket: put handling into one file (78f821b6) · Commits · e / devices / android_kernel_oneplus_sm7250

net/ieee802154/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -5,6 +5,6 @@ obj-$(CONFIG_IEEE802154_6LOWPAN) += ieee802154_6lowpan.o
		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 raw.o dgram.o
		ieee802154_socket-y := af_ieee802154.o

		ccflags-y += -D__CHECK_ENDIAN__

net/ieee802154/af802154.h

deleted100644 → 0

+0 −33

Original line number	Diff line number	Diff line
		/*
		* Internal interfaces for ieee 802.15.4 address family.
		*
		* Copyright 2007, 2008, 2009 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>
		* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
		*/

		#ifndef AF802154_H
		#define AF802154_H

		struct sk_buff;
		struct net_device;
		struct ieee802154_addr;
		extern struct proto ieee802154_raw_prot;
		extern struct proto ieee802154_dgram_prot;
		void ieee802154_raw_deliver(struct net_device dev, struct sk_buff skb);
		int ieee802154_dgram_deliver(struct net_device dev, struct sk_buff skb);
		struct net_device ieee802154_get_dev(struct net net,
		const struct ieee802154_addr *addr);

		#endif

net/ieee802154/af_ieee802154.c

+759 −3

Original line number	Diff line number	Diff line
		@@ -34,10 +34,8 @@
		#include <net/af_ieee802154.h>
		#include <net/ieee802154_netdev.h>

		#include "af802154.h"

		/* Utility function for families */
		struct net_device*
		static struct net_device*
		ieee802154_get_dev(struct net net, const struct ieee802154_addr addr)
		{
		struct net_device *dev = NULL;
		@@ -182,6 +180,248 @@ static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
		}
		}

		/* 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,
		@@ -207,6 +447,522 @@ static const struct proto_ops ieee802154_raw_ops = {
		#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 != NULL) {
		/* 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,

net/ieee802154/dgram.c

deleted100644 → 0

+0 −549

File deleted.

Preview size limit exceeded, changes collapsed.

net/ieee802154/raw.c

deleted100644 → 0

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Original line number	Diff line number	Diff line
		/*
		* Raw IEEE 802.15.4 sockets
		*
		* 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>
		* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
		*/

		#include <linux/net.h>
		#include <linux/module.h>
		#include <linux/if_arp.h>
		#include <linux/list.h>
		#include <linux/slab.h>
		#include <net/sock.h>
		#include <net/af_ieee802154.h>
		#include <net/ieee802154_netdev.h>

		#include "af802154.h"

		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;
		}

		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;
		}

		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,
		};