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Diffstat (limited to 'net/ieee802154/dgram.c')
-rw-r--r--net/ieee802154/dgram.c549
1 files changed, 0 insertions, 549 deletions
diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c
deleted file mode 100644
index d1930b70c4aa..000000000000
--- a/net/ieee802154/dgram.c
+++ /dev/null
@@ -1,549 +0,0 @@
-/*
- * IEEE 802.15.4 dgram 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>
- * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
- */
-
-#include <linux/capability.h>
-#include <linux/net.h>
-#include <linux/module.h>
-#include <linux/if_arp.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/ieee802154.h>
-#include <net/sock.h>
-#include <net/af_ieee802154.h>
-#include <net/ieee802154_netdev.h>
-
-#include <asm/ioctls.h>
-
-#include "af802154.h"
-
-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;
-}
-
-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;
-}
-
-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,
-};
-
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.