diff options
Diffstat (limited to 'net/ieee802154/dgram.c')
| -rw-r--r-- | net/ieee802154/dgram.c | 549 |
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, -}; - |