| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * IEEE802154.4 socket interface |
| * |
| * Copyright 2007, 2008 Siemens AG |
| * |
| * 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 <linux/socket.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); |
| 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 = tmp->ieee802154_ptr->pan_id; |
| short_addr = tmp->ieee802154_ptr->short_addr; |
| 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 socket *sock, struct msghdr *msg, |
| size_t len) |
| { |
| struct sock *sk = sock->sk; |
| |
| return sk->sk_prot->sendmsg(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 (get_user_ifreq(&ifr, NULL, arg)) |
| 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 && put_user_ifreq(&ifr, arg)) |
| 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 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 int raw_hash(struct sock *sk) |
| { |
| write_lock_bh(&raw_lock); |
| sk_add_node(sk, &raw_head); |
| write_unlock_bh(&raw_lock); |
| sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
| |
| return 0; |
| } |
| |
| 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; |
| } |
| |
| sk->sk_bound_dev_if = dev->ifindex; |
| sk_dst_reset(sk); |
| |
| 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 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 = IEEE802154_MTU; |
| pr_debug("name = %s, mtu = %u\n", dev->name, mtu); |
| |
| if (size > mtu) { |
| pr_debug("size = %zu, mtu = %u\n", size, mtu); |
| err = -EMSGSIZE; |
| goto out_dev; |
| } |
| |
| hlen = LL_RESERVED_SPACE(dev); |
| tlen = dev->needed_tailroom; |
| skb = sock_alloc_send_skb(sk, hlen + tlen + size, |
| msg->msg_flags & MSG_DONTWAIT, &err); |
| if (!skb) |
| goto out_dev; |
| |
| skb_reserve(skb, hlen); |
| |
| skb_reset_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->protocol = htons(ETH_P_IEEE802154); |
| |
| err = dev_queue_xmit(skb); |
| if (err > 0) |
| err = net_xmit_errno(err); |
| |
| dev_put(dev); |
| |
| return err ?: size; |
| |
| out_skb: |
| kfree_skb(skb); |
| out_dev: |
| dev_put(dev); |
| out: |
| return err; |
| } |
| |
| static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
| int flags, int *addr_len) |
| { |
| size_t copied = 0; |
| int err = -EOPNOTSUPP; |
| struct sk_buff *skb; |
| |
| skb = skb_recv_datagram(sk, flags, &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_cmsgs(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, |
| sockptr_t 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, |
| .gettstamp = sock_gettstamp, |
| .listen = sock_no_listen, |
| .shutdown = sock_no_shutdown, |
| .setsockopt = sock_common_setsockopt, |
| .getsockopt = sock_common_getsockopt, |
| .sendmsg = ieee802154_sock_sendmsg, |
| .recvmsg = sock_common_recvmsg, |
| .mmap = sock_no_mmap, |
| .sendpage = sock_no_sendpage, |
| }; |
| |
| /* 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 want_lqi:1; |
| unsigned int secen:1; |
| unsigned int secen_override:1; |
| unsigned int seclevel:3; |
| unsigned int seclevel_override:1; |
| }; |
| |
| static inline struct dgram_sock *dgram_sk(const struct sock *sk) |
| { |
| return container_of(sk, struct dgram_sock, sk); |
| } |
| |
| static int dgram_hash(struct sock *sk) |
| { |
| write_lock_bh(&dgram_lock); |
| sk_add_node(sk, &dgram_head); |
| write_unlock_bh(&dgram_lock); |
| sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
| |
| return 0; |
| } |
| |
| static void dgram_unhash(struct sock *sk) |
| { |
| write_lock_bh(&dgram_lock); |
| if (sk_del_node_init(sk)) |
| sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
| write_unlock_bh(&dgram_lock); |
| } |
| |
| static int dgram_init(struct sock *sk) |
| { |
| struct dgram_sock *ro = dgram_sk(sk); |
| |
| ro->want_ack = 1; |
| ro->want_lqi = 0; |
| return 0; |
| } |
| |
| static void dgram_close(struct sock *sk, long timeout) |
| { |
| sk_common_release(sk); |
| } |
| |
| static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len) |
| { |
| struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; |
| struct ieee802154_addr haddr; |
| struct dgram_sock *ro = dgram_sk(sk); |
| int err = -EINVAL; |
| struct net_device *dev; |
| |
| lock_sock(sk); |
| |
| ro->bound = 0; |
| |
| 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 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 = IEEE802154_MTU; |
| pr_debug("name = %s, mtu = %u\n", dev->name, mtu); |
| |
| if (size > mtu) { |
| pr_debug("size = %zu, mtu = %u\n", size, mtu); |
| err = -EMSGSIZE; |
| goto out_dev; |
| } |
| |
| hlen = LL_RESERVED_SPACE(dev); |
| tlen = dev->needed_tailroom; |
| skb = sock_alloc_send_skb(sk, hlen + tlen + size, |
| msg->msg_flags & MSG_DONTWAIT, |
| &err); |
| if (!skb) |
| goto out_dev; |
| |
| skb_reserve(skb, hlen); |
| |
| skb_reset_network_header(skb); |
| |
| cb = mac_cb_init(skb); |
| cb->type = IEEE802154_FC_TYPE_DATA; |
| cb->ackreq = ro->want_ack; |
| |
| 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 = wpan_dev_hard_header(skb, dev, &dst_addr, |
| ro->bound ? &ro->src_addr : NULL, size); |
| if (err < 0) |
| goto out_skb; |
| |
| err = memcpy_from_msg(skb_put(skb, size), msg, size); |
| if (err < 0) |
| goto out_skb; |
| |
| skb->dev = dev; |
| skb->protocol = htons(ETH_P_IEEE802154); |
| |
| err = dev_queue_xmit(skb); |
| if (err > 0) |
| err = net_xmit_errno(err); |
| |
| dev_put(dev); |
| |
| return err ?: size; |
| |
| out_skb: |
| kfree_skb(skb); |
| out_dev: |
| dev_put(dev); |
| out: |
| return err; |
| } |
| |
| static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
| int flags, int *addr_len) |
| { |
| size_t copied = 0; |
| int err = -EOPNOTSUPP; |
| struct sk_buff *skb; |
| struct dgram_sock *ro = dgram_sk(sk); |
| DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name); |
| |
| skb = skb_recv_datagram(sk, flags, &err); |
| if (!skb) |
| goto out; |
| |
| copied = skb->len; |
| if (len < copied) { |
| msg->msg_flags |= MSG_TRUNC; |
| copied = len; |
| } |
| |
| /* FIXME: skip headers if necessary ?! */ |
| err = skb_copy_datagram_msg(skb, 0, msg, copied); |
| if (err) |
| goto done; |
| |
| sock_recv_cmsgs(msg, sk, skb); |
| |
| if (saddr) { |
| /* Clear the implicit padding in struct sockaddr_ieee802154 |
| * (16 bits between 'family' and 'addr') and in struct |
| * ieee802154_addr_sa (16 bits at the end of the structure). |
| */ |
| memset(saddr, 0, sizeof(*saddr)); |
| |
| saddr->family = AF_IEEE802154; |
| ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source); |
| *addr_len = sizeof(*saddr); |
| } |
| |
| if (ro->want_lqi) { |
| err = put_cmsg(msg, SOL_IEEE802154, WPAN_WANTLQI, |
| sizeof(uint8_t), &(mac_cb(skb)->lqi)); |
| if (err) |
| goto done; |
| } |
| |
| if (flags & MSG_TRUNC) |
| copied = skb->len; |
| done: |
| skb_free_datagram(sk, skb); |
| out: |
| if (err) |
| return err; |
| return copied; |
| } |
| |
| static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb) |
| { |
| skb = skb_share_check(skb, GFP_ATOMIC); |
| if (!skb) |
| return NET_RX_DROP; |
| |
| if (sock_queue_rcv_skb(sk, skb) < 0) { |
| kfree_skb(skb); |
| return NET_RX_DROP; |
| } |
| |
| return NET_RX_SUCCESS; |
| } |
| |
| static inline bool |
| ieee802154_match_sock(__le64 hw_addr, __le16 pan_id, __le16 short_addr, |
| struct dgram_sock *ro) |
| { |
| if (!ro->bound) |
| return true; |
| |
| if (ro->src_addr.mode == IEEE802154_ADDR_LONG && |
| hw_addr == ro->src_addr.extended_addr) |
| return true; |
| |
| if (ro->src_addr.mode == IEEE802154_ADDR_SHORT && |
| pan_id == ro->src_addr.pan_id && |
| short_addr == ro->src_addr.short_addr) |
| return true; |
| |
| return false; |
| } |
| |
| static int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb) |
| { |
| struct sock *sk, *prev = NULL; |
| int ret = NET_RX_SUCCESS; |
| __le16 pan_id, short_addr; |
| __le64 hw_addr; |
| |
| /* Data frame processing */ |
| BUG_ON(dev->type != ARPHRD_IEEE802154); |
| |
| pan_id = dev->ieee802154_ptr->pan_id; |
| short_addr = dev->ieee802154_ptr->short_addr; |
| hw_addr = dev->ieee802154_ptr->extended_addr; |
| |
| read_lock(&dgram_lock); |
| sk_for_each(sk, &dgram_head) { |
| if (ieee802154_match_sock(hw_addr, pan_id, short_addr, |
| dgram_sk(sk))) { |
| if (prev) { |
| struct sk_buff *clone; |
| |
| clone = skb_clone(skb, GFP_ATOMIC); |
| if (clone) |
| dgram_rcv_skb(prev, clone); |
| } |
| |
| prev = sk; |
| } |
| } |
| |
| if (prev) { |
| dgram_rcv_skb(prev, skb); |
| } else { |
| kfree_skb(skb); |
| ret = NET_RX_DROP; |
| } |
| read_unlock(&dgram_lock); |
| |
| return ret; |
| } |
| |
| static int dgram_getsockopt(struct sock *sk, int level, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| struct dgram_sock *ro = dgram_sk(sk); |
| |
| int val, len; |
| |
| if (level != SOL_IEEE802154) |
| return -EOPNOTSUPP; |
| |
| if (get_user(len, optlen)) |
| return -EFAULT; |
| |
| len = min_t(unsigned int, len, sizeof(int)); |
| |
| switch (optname) { |
| case WPAN_WANTACK: |
| val = ro->want_ack; |
| break; |
| case WPAN_WANTLQI: |
| val = ro->want_lqi; |
| break; |
| case WPAN_SECURITY: |
| if (!ro->secen_override) |
| val = WPAN_SECURITY_DEFAULT; |
| else if (ro->secen) |
| val = WPAN_SECURITY_ON; |
| else |
| val = WPAN_SECURITY_OFF; |
| break; |
| case WPAN_SECURITY_LEVEL: |
| if (!ro->seclevel_override) |
| val = WPAN_SECURITY_LEVEL_DEFAULT; |
| else |
| val = ro->seclevel; |
| break; |
| default: |
| return -ENOPROTOOPT; |
| } |
| |
| if (put_user(len, optlen)) |
| return -EFAULT; |
| if (copy_to_user(optval, &val, len)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int dgram_setsockopt(struct sock *sk, int level, int optname, |
| sockptr_t optval, unsigned int optlen) |
| { |
| struct dgram_sock *ro = dgram_sk(sk); |
| struct net *net = sock_net(sk); |
| int val; |
| int err = 0; |
| |
| if (optlen < sizeof(int)) |
| return -EINVAL; |
| |
| if (copy_from_sockptr(&val, optval, sizeof(int))) |
| return -EFAULT; |
| |
| lock_sock(sk); |
| |
| switch (optname) { |
| case WPAN_WANTACK: |
| ro->want_ack = !!val; |
| break; |
| case WPAN_WANTLQI: |
| ro->want_lqi = !!val; |
| break; |
| case WPAN_SECURITY: |
| if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && |
| !ns_capable(net->user_ns, CAP_NET_RAW)) { |
| err = -EPERM; |
| break; |
| } |
| |
| switch (val) { |
| case WPAN_SECURITY_DEFAULT: |
| ro->secen_override = 0; |
| break; |
| case WPAN_SECURITY_ON: |
| ro->secen_override = 1; |
| ro->secen = 1; |
| break; |
| case WPAN_SECURITY_OFF: |
| ro->secen_override = 1; |
| ro->secen = 0; |
| break; |
| default: |
| err = -EINVAL; |
| break; |
| } |
| break; |
| case WPAN_SECURITY_LEVEL: |
| if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && |
| !ns_capable(net->user_ns, CAP_NET_RAW)) { |
| err = -EPERM; |
| break; |
| } |
| |
| if (val < WPAN_SECURITY_LEVEL_DEFAULT || |
| val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) { |
| err = -EINVAL; |
| } else if (val == WPAN_SECURITY_LEVEL_DEFAULT) { |
| ro->seclevel_override = 0; |
| } else { |
| ro->seclevel_override = 1; |
| ro->seclevel = val; |
| } |
| break; |
| default: |
| err = -ENOPROTOOPT; |
| break; |
| } |
| |
| release_sock(sk); |
| return err; |
| } |
| |
| static struct proto ieee802154_dgram_prot = { |
| .name = "IEEE-802.15.4-MAC", |
| .owner = THIS_MODULE, |
| .obj_size = sizeof(struct dgram_sock), |
| .init = dgram_init, |
| .close = dgram_close, |
| .bind = dgram_bind, |
| .sendmsg = dgram_sendmsg, |
| .recvmsg = dgram_recvmsg, |
| .hash = dgram_hash, |
| .unhash = dgram_unhash, |
| .connect = dgram_connect, |
| .disconnect = dgram_disconnect, |
| .ioctl = dgram_ioctl, |
| .getsockopt = dgram_getsockopt, |
| .setsockopt = dgram_setsockopt, |
| }; |
| |
| static const struct proto_ops ieee802154_dgram_ops = { |
| .family = PF_IEEE802154, |
| .owner = THIS_MODULE, |
| .release = ieee802154_sock_release, |
| .bind = ieee802154_sock_bind, |
| .connect = ieee802154_sock_connect, |
| .socketpair = sock_no_socketpair, |
| .accept = sock_no_accept, |
| .getname = sock_no_getname, |
| .poll = datagram_poll, |
| .ioctl = ieee802154_sock_ioctl, |
| .gettstamp = sock_gettstamp, |
| .listen = sock_no_listen, |
| .shutdown = sock_no_shutdown, |
| .setsockopt = sock_common_setsockopt, |
| .getsockopt = sock_common_getsockopt, |
| .sendmsg = ieee802154_sock_sendmsg, |
| .recvmsg = sock_common_recvmsg, |
| .mmap = sock_no_mmap, |
| .sendpage = sock_no_sendpage, |
| }; |
| |
| static void ieee802154_sock_destruct(struct sock *sk) |
| { |
| skb_queue_purge(&sk->sk_receive_queue); |
| } |
| |
| /* Create a socket. Initialise the socket, blank the addresses |
| * set the state. |
| */ |
| static int ieee802154_create(struct net *net, struct socket *sock, |
| int protocol, int kern) |
| { |
| struct sock *sk; |
| int rc; |
| struct proto *proto; |
| const struct proto_ops *ops; |
| |
| if (!net_eq(net, &init_net)) |
| return -EAFNOSUPPORT; |
| |
| switch (sock->type) { |
| case SOCK_RAW: |
| rc = -EPERM; |
| if (!capable(CAP_NET_RAW)) |
| goto out; |
| proto = &ieee802154_raw_prot; |
| ops = &ieee802154_raw_ops; |
| break; |
| case SOCK_DGRAM: |
| proto = &ieee802154_dgram_prot; |
| ops = &ieee802154_dgram_ops; |
| break; |
| default: |
| rc = -ESOCKTNOSUPPORT; |
| goto out; |
| } |
| |
| rc = -ENOMEM; |
| sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto, kern); |
| if (!sk) |
| goto out; |
| rc = 0; |
| |
| sock->ops = ops; |
| |
| sock_init_data(sock, sk); |
| sk->sk_destruct = ieee802154_sock_destruct; |
| sk->sk_family = PF_IEEE802154; |
| |
| /* Checksums on by default */ |
| sock_set_flag(sk, SOCK_ZAPPED); |
| |
| if (sk->sk_prot->hash) { |
| rc = sk->sk_prot->hash(sk); |
| if (rc) { |
| sk_common_release(sk); |
| goto out; |
| } |
| } |
| |
| if (sk->sk_prot->init) { |
| rc = sk->sk_prot->init(sk); |
| if (rc) |
| sk_common_release(sk); |
| } |
| out: |
| return rc; |
| } |
| |
| static const struct net_proto_family ieee802154_family_ops = { |
| .family = PF_IEEE802154, |
| .create = ieee802154_create, |
| .owner = THIS_MODULE, |
| }; |
| |
| static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, |
| struct packet_type *pt, struct net_device *orig_dev) |
| { |
| if (!netif_running(dev)) |
| goto drop; |
| pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
| #ifdef DEBUG |
| print_hex_dump_bytes("ieee802154_rcv ", |
| DUMP_PREFIX_NONE, skb->data, skb->len); |
| #endif |
| |
| if (!net_eq(dev_net(dev), &init_net)) |
| goto drop; |
| |
| ieee802154_raw_deliver(dev, skb); |
| |
| if (dev->type != ARPHRD_IEEE802154) |
| goto drop; |
| |
| if (skb->pkt_type != PACKET_OTHERHOST) |
| return ieee802154_dgram_deliver(dev, skb); |
| |
| drop: |
| kfree_skb(skb); |
| return NET_RX_DROP; |
| } |
| |
| static struct packet_type ieee802154_packet_type = { |
| .type = htons(ETH_P_IEEE802154), |
| .func = ieee802154_rcv, |
| }; |
| |
| static int __init af_ieee802154_init(void) |
| { |
| int rc; |
| |
| rc = proto_register(&ieee802154_raw_prot, 1); |
| if (rc) |
| goto out; |
| |
| rc = proto_register(&ieee802154_dgram_prot, 1); |
| if (rc) |
| goto err_dgram; |
| |
| /* Tell SOCKET that we are alive */ |
| rc = sock_register(&ieee802154_family_ops); |
| if (rc) |
| goto err_sock; |
| dev_add_pack(&ieee802154_packet_type); |
| |
| rc = 0; |
| goto out; |
| |
| err_sock: |
| proto_unregister(&ieee802154_dgram_prot); |
| err_dgram: |
| proto_unregister(&ieee802154_raw_prot); |
| out: |
| return rc; |
| } |
| |
| static void __exit af_ieee802154_remove(void) |
| { |
| dev_remove_pack(&ieee802154_packet_type); |
| sock_unregister(PF_IEEE802154); |
| proto_unregister(&ieee802154_dgram_prot); |
| proto_unregister(&ieee802154_raw_prot); |
| } |
| |
| module_init(af_ieee802154_init); |
| module_exit(af_ieee802154_remove); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_NETPROTO(PF_IEEE802154); |