| /* |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) |
| * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) |
| * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk) |
| */ |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/capability.h> |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/socket.h> |
| #include <linux/in.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/timer.h> |
| #include <linux/string.h> |
| #include <linux/sockios.h> |
| #include <linux/net.h> |
| #include <linux/stat.h> |
| #include <net/ax25.h> |
| #include <linux/inet.h> |
| #include <linux/netdevice.h> |
| #include <linux/if_arp.h> |
| #include <linux/skbuff.h> |
| #include <net/net_namespace.h> |
| #include <net/sock.h> |
| #include <asm/uaccess.h> |
| #include <asm/system.h> |
| #include <linux/fcntl.h> |
| #include <linux/termios.h> /* For TIOCINQ/OUTQ */ |
| #include <linux/mm.h> |
| #include <linux/interrupt.h> |
| #include <linux/notifier.h> |
| #include <net/netrom.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <net/ip.h> |
| #include <net/tcp_states.h> |
| #include <net/arp.h> |
| #include <linux/init.h> |
| |
| static int nr_ndevs = 4; |
| |
| int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL; |
| int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS; |
| int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL; |
| int sysctl_netrom_transport_timeout = NR_DEFAULT_T1; |
| int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2; |
| int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2; |
| int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4; |
| int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW; |
| int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE; |
| int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING; |
| int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS; |
| int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
| |
| static unsigned short circuit = 0x101; |
| |
| static HLIST_HEAD(nr_list); |
| static DEFINE_SPINLOCK(nr_list_lock); |
| |
| static const struct proto_ops nr_proto_ops; |
| |
| /* |
| * NETROM network devices are virtual network devices encapsulating NETROM |
| * frames into AX.25 which will be sent through an AX.25 device, so form a |
| * special "super class" of normal net devices; split their locks off into a |
| * separate class since they always nest. |
| */ |
| static struct lock_class_key nr_netdev_xmit_lock_key; |
| static struct lock_class_key nr_netdev_addr_lock_key; |
| |
| static void nr_set_lockdep_one(struct net_device *dev, |
| struct netdev_queue *txq, |
| void *_unused) |
| { |
| lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key); |
| } |
| |
| static void nr_set_lockdep_key(struct net_device *dev) |
| { |
| lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key); |
| netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL); |
| } |
| |
| /* |
| * Socket removal during an interrupt is now safe. |
| */ |
| static void nr_remove_socket(struct sock *sk) |
| { |
| spin_lock_bh(&nr_list_lock); |
| sk_del_node_init(sk); |
| spin_unlock_bh(&nr_list_lock); |
| } |
| |
| /* |
| * Kill all bound sockets on a dropped device. |
| */ |
| static void nr_kill_by_device(struct net_device *dev) |
| { |
| struct sock *s; |
| struct hlist_node *node; |
| |
| spin_lock_bh(&nr_list_lock); |
| sk_for_each(s, node, &nr_list) |
| if (nr_sk(s)->device == dev) |
| nr_disconnect(s, ENETUNREACH); |
| spin_unlock_bh(&nr_list_lock); |
| } |
| |
| /* |
| * Handle device status changes. |
| */ |
| static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
| { |
| struct net_device *dev = (struct net_device *)ptr; |
| |
| if (!net_eq(dev_net(dev), &init_net)) |
| return NOTIFY_DONE; |
| |
| if (event != NETDEV_DOWN) |
| return NOTIFY_DONE; |
| |
| nr_kill_by_device(dev); |
| nr_rt_device_down(dev); |
| |
| return NOTIFY_DONE; |
| } |
| |
| /* |
| * Add a socket to the bound sockets list. |
| */ |
| static void nr_insert_socket(struct sock *sk) |
| { |
| spin_lock_bh(&nr_list_lock); |
| sk_add_node(sk, &nr_list); |
| spin_unlock_bh(&nr_list_lock); |
| } |
| |
| /* |
| * Find a socket that wants to accept the Connect Request we just |
| * received. |
| */ |
| static struct sock *nr_find_listener(ax25_address *addr) |
| { |
| struct sock *s; |
| struct hlist_node *node; |
| |
| spin_lock_bh(&nr_list_lock); |
| sk_for_each(s, node, &nr_list) |
| if (!ax25cmp(&nr_sk(s)->source_addr, addr) && |
| s->sk_state == TCP_LISTEN) { |
| bh_lock_sock(s); |
| goto found; |
| } |
| s = NULL; |
| found: |
| spin_unlock_bh(&nr_list_lock); |
| return s; |
| } |
| |
| /* |
| * Find a connected NET/ROM socket given my circuit IDs. |
| */ |
| static struct sock *nr_find_socket(unsigned char index, unsigned char id) |
| { |
| struct sock *s; |
| struct hlist_node *node; |
| |
| spin_lock_bh(&nr_list_lock); |
| sk_for_each(s, node, &nr_list) { |
| struct nr_sock *nr = nr_sk(s); |
| |
| if (nr->my_index == index && nr->my_id == id) { |
| bh_lock_sock(s); |
| goto found; |
| } |
| } |
| s = NULL; |
| found: |
| spin_unlock_bh(&nr_list_lock); |
| return s; |
| } |
| |
| /* |
| * Find a connected NET/ROM socket given their circuit IDs. |
| */ |
| static struct sock *nr_find_peer(unsigned char index, unsigned char id, |
| ax25_address *dest) |
| { |
| struct sock *s; |
| struct hlist_node *node; |
| |
| spin_lock_bh(&nr_list_lock); |
| sk_for_each(s, node, &nr_list) { |
| struct nr_sock *nr = nr_sk(s); |
| |
| if (nr->your_index == index && nr->your_id == id && |
| !ax25cmp(&nr->dest_addr, dest)) { |
| bh_lock_sock(s); |
| goto found; |
| } |
| } |
| s = NULL; |
| found: |
| spin_unlock_bh(&nr_list_lock); |
| return s; |
| } |
| |
| /* |
| * Find next free circuit ID. |
| */ |
| static unsigned short nr_find_next_circuit(void) |
| { |
| unsigned short id = circuit; |
| unsigned char i, j; |
| struct sock *sk; |
| |
| for (;;) { |
| i = id / 256; |
| j = id % 256; |
| |
| if (i != 0 && j != 0) { |
| if ((sk=nr_find_socket(i, j)) == NULL) |
| break; |
| bh_unlock_sock(sk); |
| } |
| |
| id++; |
| } |
| |
| return id; |
| } |
| |
| /* |
| * Deferred destroy. |
| */ |
| void nr_destroy_socket(struct sock *); |
| |
| /* |
| * Handler for deferred kills. |
| */ |
| static void nr_destroy_timer(unsigned long data) |
| { |
| struct sock *sk=(struct sock *)data; |
| bh_lock_sock(sk); |
| sock_hold(sk); |
| nr_destroy_socket(sk); |
| bh_unlock_sock(sk); |
| sock_put(sk); |
| } |
| |
| /* |
| * This is called from user mode and the timers. Thus it protects itself |
| * against interrupt users but doesn't worry about being called during |
| * work. Once it is removed from the queue no interrupt or bottom half |
| * will touch it and we are (fairly 8-) ) safe. |
| */ |
| void nr_destroy_socket(struct sock *sk) |
| { |
| struct sk_buff *skb; |
| |
| nr_remove_socket(sk); |
| |
| nr_stop_heartbeat(sk); |
| nr_stop_t1timer(sk); |
| nr_stop_t2timer(sk); |
| nr_stop_t4timer(sk); |
| nr_stop_idletimer(sk); |
| |
| nr_clear_queues(sk); /* Flush the queues */ |
| |
| while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
| if (skb->sk != sk) { /* A pending connection */ |
| /* Queue the unaccepted socket for death */ |
| sock_set_flag(skb->sk, SOCK_DEAD); |
| nr_start_heartbeat(skb->sk); |
| nr_sk(skb->sk)->state = NR_STATE_0; |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| if (sk_has_allocations(sk)) { |
| /* Defer: outstanding buffers */ |
| sk->sk_timer.function = nr_destroy_timer; |
| sk->sk_timer.expires = jiffies + 2 * HZ; |
| add_timer(&sk->sk_timer); |
| } else |
| sock_put(sk); |
| } |
| |
| /* |
| * Handling for system calls applied via the various interfaces to a |
| * NET/ROM socket object. |
| */ |
| |
| static int nr_setsockopt(struct socket *sock, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| struct sock *sk = sock->sk; |
| struct nr_sock *nr = nr_sk(sk); |
| int opt; |
| |
| if (level != SOL_NETROM) |
| return -ENOPROTOOPT; |
| |
| if (optlen < sizeof(int)) |
| return -EINVAL; |
| |
| if (get_user(opt, (int __user *)optval)) |
| return -EFAULT; |
| |
| switch (optname) { |
| case NETROM_T1: |
| if (opt < 1) |
| return -EINVAL; |
| nr->t1 = opt * HZ; |
| return 0; |
| |
| case NETROM_T2: |
| if (opt < 1) |
| return -EINVAL; |
| nr->t2 = opt * HZ; |
| return 0; |
| |
| case NETROM_N2: |
| if (opt < 1 || opt > 31) |
| return -EINVAL; |
| nr->n2 = opt; |
| return 0; |
| |
| case NETROM_T4: |
| if (opt < 1) |
| return -EINVAL; |
| nr->t4 = opt * HZ; |
| return 0; |
| |
| case NETROM_IDLE: |
| if (opt < 0) |
| return -EINVAL; |
| nr->idle = opt * 60 * HZ; |
| return 0; |
| |
| default: |
| return -ENOPROTOOPT; |
| } |
| } |
| |
| static int nr_getsockopt(struct socket *sock, int level, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| struct sock *sk = sock->sk; |
| struct nr_sock *nr = nr_sk(sk); |
| int val = 0; |
| int len; |
| |
| if (level != SOL_NETROM) |
| return -ENOPROTOOPT; |
| |
| if (get_user(len, optlen)) |
| return -EFAULT; |
| |
| if (len < 0) |
| return -EINVAL; |
| |
| switch (optname) { |
| case NETROM_T1: |
| val = nr->t1 / HZ; |
| break; |
| |
| case NETROM_T2: |
| val = nr->t2 / HZ; |
| break; |
| |
| case NETROM_N2: |
| val = nr->n2; |
| break; |
| |
| case NETROM_T4: |
| val = nr->t4 / HZ; |
| break; |
| |
| case NETROM_IDLE: |
| val = nr->idle / (60 * HZ); |
| break; |
| |
| default: |
| return -ENOPROTOOPT; |
| } |
| |
| len = min_t(unsigned int, len, sizeof(int)); |
| |
| if (put_user(len, optlen)) |
| return -EFAULT; |
| |
| return copy_to_user(optval, &val, len) ? -EFAULT : 0; |
| } |
| |
| static int nr_listen(struct socket *sock, int backlog) |
| { |
| struct sock *sk = sock->sk; |
| |
| lock_sock(sk); |
| if (sk->sk_state != TCP_LISTEN) { |
| memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); |
| sk->sk_max_ack_backlog = backlog; |
| sk->sk_state = TCP_LISTEN; |
| release_sock(sk); |
| return 0; |
| } |
| release_sock(sk); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static struct proto nr_proto = { |
| .name = "NETROM", |
| .owner = THIS_MODULE, |
| .obj_size = sizeof(struct nr_sock), |
| }; |
| |
| static int nr_create(struct net *net, struct socket *sock, int protocol) |
| { |
| struct sock *sk; |
| struct nr_sock *nr; |
| |
| if (net != &init_net) |
| return -EAFNOSUPPORT; |
| |
| if (sock->type != SOCK_SEQPACKET || protocol != 0) |
| return -ESOCKTNOSUPPORT; |
| |
| sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto); |
| if (sk == NULL) |
| return -ENOMEM; |
| |
| nr = nr_sk(sk); |
| |
| sock_init_data(sock, sk); |
| |
| sock->ops = &nr_proto_ops; |
| sk->sk_protocol = protocol; |
| |
| skb_queue_head_init(&nr->ack_queue); |
| skb_queue_head_init(&nr->reseq_queue); |
| skb_queue_head_init(&nr->frag_queue); |
| |
| nr_init_timers(sk); |
| |
| nr->t1 = |
| msecs_to_jiffies(sysctl_netrom_transport_timeout); |
| nr->t2 = |
| msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); |
| nr->n2 = |
| msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); |
| nr->t4 = |
| msecs_to_jiffies(sysctl_netrom_transport_busy_delay); |
| nr->idle = |
| msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); |
| nr->window = sysctl_netrom_transport_requested_window_size; |
| |
| nr->bpqext = 1; |
| nr->state = NR_STATE_0; |
| |
| return 0; |
| } |
| |
| static struct sock *nr_make_new(struct sock *osk) |
| { |
| struct sock *sk; |
| struct nr_sock *nr, *onr; |
| |
| if (osk->sk_type != SOCK_SEQPACKET) |
| return NULL; |
| |
| sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot); |
| if (sk == NULL) |
| return NULL; |
| |
| nr = nr_sk(sk); |
| |
| sock_init_data(NULL, sk); |
| |
| sk->sk_type = osk->sk_type; |
| sk->sk_priority = osk->sk_priority; |
| sk->sk_protocol = osk->sk_protocol; |
| sk->sk_rcvbuf = osk->sk_rcvbuf; |
| sk->sk_sndbuf = osk->sk_sndbuf; |
| sk->sk_state = TCP_ESTABLISHED; |
| sock_copy_flags(sk, osk); |
| |
| skb_queue_head_init(&nr->ack_queue); |
| skb_queue_head_init(&nr->reseq_queue); |
| skb_queue_head_init(&nr->frag_queue); |
| |
| nr_init_timers(sk); |
| |
| onr = nr_sk(osk); |
| |
| nr->t1 = onr->t1; |
| nr->t2 = onr->t2; |
| nr->n2 = onr->n2; |
| nr->t4 = onr->t4; |
| nr->idle = onr->idle; |
| nr->window = onr->window; |
| |
| nr->device = onr->device; |
| nr->bpqext = onr->bpqext; |
| |
| return sk; |
| } |
| |
| static int nr_release(struct socket *sock) |
| { |
| struct sock *sk = sock->sk; |
| struct nr_sock *nr; |
| |
| if (sk == NULL) return 0; |
| |
| sock_hold(sk); |
| sock_orphan(sk); |
| lock_sock(sk); |
| nr = nr_sk(sk); |
| |
| switch (nr->state) { |
| case NR_STATE_0: |
| case NR_STATE_1: |
| case NR_STATE_2: |
| nr_disconnect(sk, 0); |
| nr_destroy_socket(sk); |
| break; |
| |
| case NR_STATE_3: |
| nr_clear_queues(sk); |
| nr->n2count = 0; |
| nr_write_internal(sk, NR_DISCREQ); |
| nr_start_t1timer(sk); |
| nr_stop_t2timer(sk); |
| nr_stop_t4timer(sk); |
| nr_stop_idletimer(sk); |
| nr->state = NR_STATE_2; |
| sk->sk_state = TCP_CLOSE; |
| sk->sk_shutdown |= SEND_SHUTDOWN; |
| sk->sk_state_change(sk); |
| sock_set_flag(sk, SOCK_DESTROY); |
| break; |
| |
| default: |
| break; |
| } |
| |
| sock->sk = NULL; |
| release_sock(sk); |
| sock_put(sk); |
| |
| return 0; |
| } |
| |
| static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| { |
| struct sock *sk = sock->sk; |
| struct nr_sock *nr = nr_sk(sk); |
| struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; |
| struct net_device *dev; |
| ax25_uid_assoc *user; |
| ax25_address *source; |
| |
| lock_sock(sk); |
| if (!sock_flag(sk, SOCK_ZAPPED)) { |
| release_sock(sk); |
| return -EINVAL; |
| } |
| if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { |
| release_sock(sk); |
| return -EINVAL; |
| } |
| if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { |
| release_sock(sk); |
| return -EINVAL; |
| } |
| if (addr->fsa_ax25.sax25_family != AF_NETROM) { |
| release_sock(sk); |
| return -EINVAL; |
| } |
| if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { |
| SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); |
| release_sock(sk); |
| return -EADDRNOTAVAIL; |
| } |
| |
| /* |
| * Only the super user can set an arbitrary user callsign. |
| */ |
| if (addr->fsa_ax25.sax25_ndigis == 1) { |
| if (!capable(CAP_NET_BIND_SERVICE)) { |
| dev_put(dev); |
| release_sock(sk); |
| return -EACCES; |
| } |
| nr->user_addr = addr->fsa_digipeater[0]; |
| nr->source_addr = addr->fsa_ax25.sax25_call; |
| } else { |
| source = &addr->fsa_ax25.sax25_call; |
| |
| user = ax25_findbyuid(current_euid()); |
| if (user) { |
| nr->user_addr = user->call; |
| ax25_uid_put(user); |
| } else { |
| if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
| release_sock(sk); |
| dev_put(dev); |
| return -EPERM; |
| } |
| nr->user_addr = *source; |
| } |
| |
| nr->source_addr = *source; |
| } |
| |
| nr->device = dev; |
| nr_insert_socket(sk); |
| |
| sock_reset_flag(sk, SOCK_ZAPPED); |
| dev_put(dev); |
| release_sock(sk); |
| SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); |
| return 0; |
| } |
| |
| static int nr_connect(struct socket *sock, struct sockaddr *uaddr, |
| int addr_len, int flags) |
| { |
| struct sock *sk = sock->sk; |
| struct nr_sock *nr = nr_sk(sk); |
| struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; |
| ax25_address *source = NULL; |
| ax25_uid_assoc *user; |
| struct net_device *dev; |
| int err = 0; |
| |
| lock_sock(sk); |
| if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { |
| sock->state = SS_CONNECTED; |
| goto out_release; /* Connect completed during a ERESTARTSYS event */ |
| } |
| |
| if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { |
| sock->state = SS_UNCONNECTED; |
| err = -ECONNREFUSED; |
| goto out_release; |
| } |
| |
| if (sk->sk_state == TCP_ESTABLISHED) { |
| err = -EISCONN; /* No reconnect on a seqpacket socket */ |
| goto out_release; |
| } |
| |
| sk->sk_state = TCP_CLOSE; |
| sock->state = SS_UNCONNECTED; |
| |
| if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { |
| err = -EINVAL; |
| goto out_release; |
| } |
| if (addr->sax25_family != AF_NETROM) { |
| err = -EINVAL; |
| goto out_release; |
| } |
| if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ |
| sock_reset_flag(sk, SOCK_ZAPPED); |
| |
| if ((dev = nr_dev_first()) == NULL) { |
| err = -ENETUNREACH; |
| goto out_release; |
| } |
| source = (ax25_address *)dev->dev_addr; |
| |
| user = ax25_findbyuid(current_euid()); |
| if (user) { |
| nr->user_addr = user->call; |
| ax25_uid_put(user); |
| } else { |
| if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
| dev_put(dev); |
| err = -EPERM; |
| goto out_release; |
| } |
| nr->user_addr = *source; |
| } |
| |
| nr->source_addr = *source; |
| nr->device = dev; |
| |
| dev_put(dev); |
| nr_insert_socket(sk); /* Finish the bind */ |
| } |
| |
| nr->dest_addr = addr->sax25_call; |
| |
| release_sock(sk); |
| circuit = nr_find_next_circuit(); |
| lock_sock(sk); |
| |
| nr->my_index = circuit / 256; |
| nr->my_id = circuit % 256; |
| |
| circuit++; |
| |
| /* Move to connecting socket, start sending Connect Requests */ |
| sock->state = SS_CONNECTING; |
| sk->sk_state = TCP_SYN_SENT; |
| |
| nr_establish_data_link(sk); |
| |
| nr->state = NR_STATE_1; |
| |
| nr_start_heartbeat(sk); |
| |
| /* Now the loop */ |
| if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
| err = -EINPROGRESS; |
| goto out_release; |
| } |
| |
| /* |
| * A Connect Ack with Choke or timeout or failed routing will go to |
| * closed. |
| */ |
| if (sk->sk_state == TCP_SYN_SENT) { |
| DEFINE_WAIT(wait); |
| |
| for (;;) { |
| prepare_to_wait(sk->sk_sleep, &wait, |
| TASK_INTERRUPTIBLE); |
| if (sk->sk_state != TCP_SYN_SENT) |
| break; |
| if (!signal_pending(current)) { |
| release_sock(sk); |
| schedule(); |
| lock_sock(sk); |
| continue; |
| } |
| err = -ERESTARTSYS; |
| break; |
| } |
| finish_wait(sk->sk_sleep, &wait); |
| if (err) |
| goto out_release; |
| } |
| |
| if (sk->sk_state != TCP_ESTABLISHED) { |
| sock->state = SS_UNCONNECTED; |
| err = sock_error(sk); /* Always set at this point */ |
| goto out_release; |
| } |
| |
| sock->state = SS_CONNECTED; |
| |
| out_release: |
| release_sock(sk); |
| |
| return err; |
| } |
| |
| static int nr_accept(struct socket *sock, struct socket *newsock, int flags) |
| { |
| struct sk_buff *skb; |
| struct sock *newsk; |
| DEFINE_WAIT(wait); |
| struct sock *sk; |
| int err = 0; |
| |
| if ((sk = sock->sk) == NULL) |
| return -EINVAL; |
| |
| lock_sock(sk); |
| if (sk->sk_type != SOCK_SEQPACKET) { |
| err = -EOPNOTSUPP; |
| goto out_release; |
| } |
| |
| if (sk->sk_state != TCP_LISTEN) { |
| err = -EINVAL; |
| goto out_release; |
| } |
| |
| /* |
| * The write queue this time is holding sockets ready to use |
| * hooked into the SABM we saved |
| */ |
| for (;;) { |
| prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
| skb = skb_dequeue(&sk->sk_receive_queue); |
| if (skb) |
| break; |
| |
| if (flags & O_NONBLOCK) { |
| err = -EWOULDBLOCK; |
| break; |
| } |
| if (!signal_pending(current)) { |
| release_sock(sk); |
| schedule(); |
| lock_sock(sk); |
| continue; |
| } |
| err = -ERESTARTSYS; |
| break; |
| } |
| finish_wait(sk->sk_sleep, &wait); |
| if (err) |
| goto out_release; |
| |
| newsk = skb->sk; |
| sock_graft(newsk, newsock); |
| |
| /* Now attach up the new socket */ |
| kfree_skb(skb); |
| sk_acceptq_removed(sk); |
| |
| out_release: |
| release_sock(sk); |
| |
| return err; |
| } |
| |
| static int nr_getname(struct socket *sock, struct sockaddr *uaddr, |
| int *uaddr_len, int peer) |
| { |
| struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; |
| struct sock *sk = sock->sk; |
| struct nr_sock *nr = nr_sk(sk); |
| |
| lock_sock(sk); |
| if (peer != 0) { |
| if (sk->sk_state != TCP_ESTABLISHED) { |
| release_sock(sk); |
| return -ENOTCONN; |
| } |
| sax->fsa_ax25.sax25_family = AF_NETROM; |
| sax->fsa_ax25.sax25_ndigis = 1; |
| sax->fsa_ax25.sax25_call = nr->user_addr; |
| memset(sax->fsa_digipeater, 0, sizeof(sax->fsa_digipeater)); |
| sax->fsa_digipeater[0] = nr->dest_addr; |
| *uaddr_len = sizeof(struct full_sockaddr_ax25); |
| } else { |
| sax->fsa_ax25.sax25_family = AF_NETROM; |
| sax->fsa_ax25.sax25_ndigis = 0; |
| sax->fsa_ax25.sax25_call = nr->source_addr; |
| *uaddr_len = sizeof(struct sockaddr_ax25); |
| } |
| release_sock(sk); |
| |
| return 0; |
| } |
| |
| int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct sock *sk; |
| struct sock *make; |
| struct nr_sock *nr_make; |
| ax25_address *src, *dest, *user; |
| unsigned short circuit_index, circuit_id; |
| unsigned short peer_circuit_index, peer_circuit_id; |
| unsigned short frametype, flags, window, timeout; |
| int ret; |
| |
| skb->sk = NULL; /* Initially we don't know who it's for */ |
| |
| /* |
| * skb->data points to the netrom frame start |
| */ |
| |
| src = (ax25_address *)(skb->data + 0); |
| dest = (ax25_address *)(skb->data + 7); |
| |
| circuit_index = skb->data[15]; |
| circuit_id = skb->data[16]; |
| peer_circuit_index = skb->data[17]; |
| peer_circuit_id = skb->data[18]; |
| frametype = skb->data[19] & 0x0F; |
| flags = skb->data[19] & 0xF0; |
| |
| /* |
| * Check for an incoming IP over NET/ROM frame. |
| */ |
| if (frametype == NR_PROTOEXT && |
| circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { |
| skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); |
| skb_reset_transport_header(skb); |
| |
| return nr_rx_ip(skb, dev); |
| } |
| |
| /* |
| * Find an existing socket connection, based on circuit ID, if it's |
| * a Connect Request base it on their circuit ID. |
| * |
| * Circuit ID 0/0 is not valid but it could still be a "reset" for a |
| * circuit that no longer exists at the other end ... |
| */ |
| |
| sk = NULL; |
| |
| if (circuit_index == 0 && circuit_id == 0) { |
| if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) |
| sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); |
| } else { |
| if (frametype == NR_CONNREQ) |
| sk = nr_find_peer(circuit_index, circuit_id, src); |
| else |
| sk = nr_find_socket(circuit_index, circuit_id); |
| } |
| |
| if (sk != NULL) { |
| skb_reset_transport_header(skb); |
| |
| if (frametype == NR_CONNACK && skb->len == 22) |
| nr_sk(sk)->bpqext = 1; |
| else |
| nr_sk(sk)->bpqext = 0; |
| |
| ret = nr_process_rx_frame(sk, skb); |
| bh_unlock_sock(sk); |
| return ret; |
| } |
| |
| /* |
| * Now it should be a CONNREQ. |
| */ |
| if (frametype != NR_CONNREQ) { |
| /* |
| * Here it would be nice to be able to send a reset but |
| * NET/ROM doesn't have one. We've tried to extend the protocol |
| * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that |
| * apparently kills BPQ boxes... :-( |
| * So now we try to follow the established behaviour of |
| * G8PZT's Xrouter which is sending packets with command type 7 |
| * as an extension of the protocol. |
| */ |
| if (sysctl_netrom_reset_circuit && |
| (frametype != NR_RESET || flags != 0)) |
| nr_transmit_reset(skb, 1); |
| |
| return 0; |
| } |
| |
| sk = nr_find_listener(dest); |
| |
| user = (ax25_address *)(skb->data + 21); |
| |
| if (sk == NULL || sk_acceptq_is_full(sk) || |
| (make = nr_make_new(sk)) == NULL) { |
| nr_transmit_refusal(skb, 0); |
| if (sk) |
| bh_unlock_sock(sk); |
| return 0; |
| } |
| |
| window = skb->data[20]; |
| |
| skb->sk = make; |
| make->sk_state = TCP_ESTABLISHED; |
| |
| /* Fill in his circuit details */ |
| nr_make = nr_sk(make); |
| nr_make->source_addr = *dest; |
| nr_make->dest_addr = *src; |
| nr_make->user_addr = *user; |
| |
| nr_make->your_index = circuit_index; |
| nr_make->your_id = circuit_id; |
| |
| bh_unlock_sock(sk); |
| circuit = nr_find_next_circuit(); |
| bh_lock_sock(sk); |
| |
| nr_make->my_index = circuit / 256; |
| nr_make->my_id = circuit % 256; |
| |
| circuit++; |
| |
| /* Window negotiation */ |
| if (window < nr_make->window) |
| nr_make->window = window; |
| |
| /* L4 timeout negotiation */ |
| if (skb->len == 37) { |
| timeout = skb->data[36] * 256 + skb->data[35]; |
| if (timeout * HZ < nr_make->t1) |
| nr_make->t1 = timeout * HZ; |
| nr_make->bpqext = 1; |
| } else { |
| nr_make->bpqext = 0; |
| } |
| |
| nr_write_internal(make, NR_CONNACK); |
| |
| nr_make->condition = 0x00; |
| nr_make->vs = 0; |
| nr_make->va = 0; |
| nr_make->vr = 0; |
| nr_make->vl = 0; |
| nr_make->state = NR_STATE_3; |
| sk_acceptq_added(sk); |
| skb_queue_head(&sk->sk_receive_queue, skb); |
| |
| if (!sock_flag(sk, SOCK_DEAD)) |
| sk->sk_data_ready(sk, skb->len); |
| |
| bh_unlock_sock(sk); |
| |
| nr_insert_socket(make); |
| |
| nr_start_heartbeat(make); |
| nr_start_idletimer(make); |
| |
| return 1; |
| } |
| |
| static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, |
| struct msghdr *msg, size_t len) |
| { |
| struct sock *sk = sock->sk; |
| struct nr_sock *nr = nr_sk(sk); |
| struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; |
| int err; |
| struct sockaddr_ax25 sax; |
| struct sk_buff *skb; |
| unsigned char *asmptr; |
| int size; |
| |
| if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) |
| return -EINVAL; |
| |
| lock_sock(sk); |
| if (sock_flag(sk, SOCK_ZAPPED)) { |
| err = -EADDRNOTAVAIL; |
| goto out; |
| } |
| |
| if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| send_sig(SIGPIPE, current, 0); |
| err = -EPIPE; |
| goto out; |
| } |
| |
| if (nr->device == NULL) { |
| err = -ENETUNREACH; |
| goto out; |
| } |
| |
| if (usax) { |
| if (msg->msg_namelen < sizeof(sax)) { |
| err = -EINVAL; |
| goto out; |
| } |
| sax = *usax; |
| if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { |
| err = -EISCONN; |
| goto out; |
| } |
| if (sax.sax25_family != AF_NETROM) { |
| err = -EINVAL; |
| goto out; |
| } |
| } else { |
| if (sk->sk_state != TCP_ESTABLISHED) { |
| err = -ENOTCONN; |
| goto out; |
| } |
| sax.sax25_family = AF_NETROM; |
| sax.sax25_call = nr->dest_addr; |
| } |
| |
| SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); |
| |
| /* Build a packet - the conventional user limit is 236 bytes. We can |
| do ludicrously large NetROM frames but must not overflow */ |
| if (len > 65536) { |
| err = -EMSGSIZE; |
| goto out; |
| } |
| |
| SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); |
| size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; |
| |
| if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) |
| goto out; |
| |
| skb_reserve(skb, size - len); |
| skb_reset_transport_header(skb); |
| |
| /* |
| * Push down the NET/ROM header |
| */ |
| |
| asmptr = skb_push(skb, NR_TRANSPORT_LEN); |
| SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); |
| |
| /* Build a NET/ROM Transport header */ |
| |
| *asmptr++ = nr->your_index; |
| *asmptr++ = nr->your_id; |
| *asmptr++ = 0; /* To be filled in later */ |
| *asmptr++ = 0; /* Ditto */ |
| *asmptr++ = NR_INFO; |
| SOCK_DEBUG(sk, "Built header.\n"); |
| |
| /* |
| * Put the data on the end |
| */ |
| skb_put(skb, len); |
| |
| SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); |
| |
| /* User data follows immediately after the NET/ROM transport header */ |
| if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) { |
| kfree_skb(skb); |
| err = -EFAULT; |
| goto out; |
| } |
| |
| SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); |
| |
| if (sk->sk_state != TCP_ESTABLISHED) { |
| kfree_skb(skb); |
| err = -ENOTCONN; |
| goto out; |
| } |
| |
| nr_output(sk, skb); /* Shove it onto the queue */ |
| |
| err = len; |
| out: |
| release_sock(sk); |
| return err; |
| } |
| |
| static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, |
| struct msghdr *msg, size_t size, int flags) |
| { |
| struct sock *sk = sock->sk; |
| struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; |
| size_t copied; |
| struct sk_buff *skb; |
| int er; |
| |
| /* |
| * This works for seqpacket too. The receiver has ordered the queue for |
| * us! We do one quick check first though |
| */ |
| |
| lock_sock(sk); |
| if (sk->sk_state != TCP_ESTABLISHED) { |
| release_sock(sk); |
| return -ENOTCONN; |
| } |
| |
| /* Now we can treat all alike */ |
| if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { |
| release_sock(sk); |
| return er; |
| } |
| |
| skb_reset_transport_header(skb); |
| copied = skb->len; |
| |
| if (copied > size) { |
| copied = size; |
| msg->msg_flags |= MSG_TRUNC; |
| } |
| |
| skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| |
| if (sax != NULL) { |
| sax->sax25_family = AF_NETROM; |
| skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call, |
| AX25_ADDR_LEN); |
| msg->msg_namelen = sizeof(*sax); |
| } |
| |
| skb_free_datagram(sk, skb); |
| |
| release_sock(sk); |
| return copied; |
| } |
| |
| |
| static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| { |
| struct sock *sk = sock->sk; |
| void __user *argp = (void __user *)arg; |
| int ret; |
| |
| switch (cmd) { |
| case TIOCOUTQ: { |
| long amount; |
| |
| lock_sock(sk); |
| amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
| if (amount < 0) |
| amount = 0; |
| release_sock(sk); |
| return put_user(amount, (int __user *)argp); |
| } |
| |
| case TIOCINQ: { |
| struct sk_buff *skb; |
| long amount = 0L; |
| |
| lock_sock(sk); |
| /* These two are safe on a single CPU system as only user tasks fiddle here */ |
| if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
| amount = skb->len; |
| release_sock(sk); |
| return put_user(amount, (int __user *)argp); |
| } |
| |
| case SIOCGSTAMP: |
| lock_sock(sk); |
| ret = sock_get_timestamp(sk, argp); |
| release_sock(sk); |
| return ret; |
| |
| case SIOCGSTAMPNS: |
| lock_sock(sk); |
| ret = sock_get_timestampns(sk, argp); |
| release_sock(sk); |
| return ret; |
| |
| case SIOCGIFADDR: |
| case SIOCSIFADDR: |
| case SIOCGIFDSTADDR: |
| case SIOCSIFDSTADDR: |
| case SIOCGIFBRDADDR: |
| case SIOCSIFBRDADDR: |
| case SIOCGIFNETMASK: |
| case SIOCSIFNETMASK: |
| case SIOCGIFMETRIC: |
| case SIOCSIFMETRIC: |
| return -EINVAL; |
| |
| case SIOCADDRT: |
| case SIOCDELRT: |
| case SIOCNRDECOBS: |
| if (!capable(CAP_NET_ADMIN)) return -EPERM; |
| return nr_rt_ioctl(cmd, argp); |
| |
| default: |
| return -ENOIOCTLCMD; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PROC_FS |
| |
| static void *nr_info_start(struct seq_file *seq, loff_t *pos) |
| { |
| struct sock *s; |
| struct hlist_node *node; |
| int i = 1; |
| |
| spin_lock_bh(&nr_list_lock); |
| if (*pos == 0) |
| return SEQ_START_TOKEN; |
| |
| sk_for_each(s, node, &nr_list) { |
| if (i == *pos) |
| return s; |
| ++i; |
| } |
| return NULL; |
| } |
| |
| static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) |
| { |
| ++*pos; |
| |
| return (v == SEQ_START_TOKEN) ? sk_head(&nr_list) |
| : sk_next((struct sock *)v); |
| } |
| |
| static void nr_info_stop(struct seq_file *seq, void *v) |
| { |
| spin_unlock_bh(&nr_list_lock); |
| } |
| |
| static int nr_info_show(struct seq_file *seq, void *v) |
| { |
| struct sock *s = v; |
| struct net_device *dev; |
| struct nr_sock *nr; |
| const char *devname; |
| char buf[11]; |
| |
| if (v == SEQ_START_TOKEN) |
| seq_puts(seq, |
| "user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n"); |
| |
| else { |
| |
| bh_lock_sock(s); |
| nr = nr_sk(s); |
| |
| if ((dev = nr->device) == NULL) |
| devname = "???"; |
| else |
| devname = dev->name; |
| |
| seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr)); |
| seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr)); |
| seq_printf(seq, |
| "%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n", |
| ax2asc(buf, &nr->source_addr), |
| devname, |
| nr->my_index, |
| nr->my_id, |
| nr->your_index, |
| nr->your_id, |
| nr->state, |
| nr->vs, |
| nr->vr, |
| nr->va, |
| ax25_display_timer(&nr->t1timer) / HZ, |
| nr->t1 / HZ, |
| ax25_display_timer(&nr->t2timer) / HZ, |
| nr->t2 / HZ, |
| ax25_display_timer(&nr->t4timer) / HZ, |
| nr->t4 / HZ, |
| ax25_display_timer(&nr->idletimer) / (60 * HZ), |
| nr->idle / (60 * HZ), |
| nr->n2count, |
| nr->n2, |
| nr->window, |
| sk_wmem_alloc_get(s), |
| sk_rmem_alloc_get(s), |
| s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); |
| |
| bh_unlock_sock(s); |
| } |
| return 0; |
| } |
| |
| static const struct seq_operations nr_info_seqops = { |
| .start = nr_info_start, |
| .next = nr_info_next, |
| .stop = nr_info_stop, |
| .show = nr_info_show, |
| }; |
| |
| static int nr_info_open(struct inode *inode, struct file *file) |
| { |
| return seq_open(file, &nr_info_seqops); |
| } |
| |
| static const struct file_operations nr_info_fops = { |
| .owner = THIS_MODULE, |
| .open = nr_info_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release, |
| }; |
| #endif /* CONFIG_PROC_FS */ |
| |
| static struct net_proto_family nr_family_ops = { |
| .family = PF_NETROM, |
| .create = nr_create, |
| .owner = THIS_MODULE, |
| }; |
| |
| static const struct proto_ops nr_proto_ops = { |
| .family = PF_NETROM, |
| .owner = THIS_MODULE, |
| .release = nr_release, |
| .bind = nr_bind, |
| .connect = nr_connect, |
| .socketpair = sock_no_socketpair, |
| .accept = nr_accept, |
| .getname = nr_getname, |
| .poll = datagram_poll, |
| .ioctl = nr_ioctl, |
| .listen = nr_listen, |
| .shutdown = sock_no_shutdown, |
| .setsockopt = nr_setsockopt, |
| .getsockopt = nr_getsockopt, |
| .sendmsg = nr_sendmsg, |
| .recvmsg = nr_recvmsg, |
| .mmap = sock_no_mmap, |
| .sendpage = sock_no_sendpage, |
| }; |
| |
| static struct notifier_block nr_dev_notifier = { |
| .notifier_call = nr_device_event, |
| }; |
| |
| static struct net_device **dev_nr; |
| |
| static struct ax25_protocol nr_pid = { |
| .pid = AX25_P_NETROM, |
| .func = nr_route_frame |
| }; |
| |
| static struct ax25_linkfail nr_linkfail_notifier = { |
| .func = nr_link_failed, |
| }; |
| |
| static int __init nr_proto_init(void) |
| { |
| int i; |
| int rc = proto_register(&nr_proto, 0); |
| |
| if (rc != 0) |
| goto out; |
| |
| if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { |
| printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); |
| return -1; |
| } |
| |
| dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
| if (dev_nr == NULL) { |
| printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); |
| return -1; |
| } |
| |
| for (i = 0; i < nr_ndevs; i++) { |
| char name[IFNAMSIZ]; |
| struct net_device *dev; |
| |
| sprintf(name, "nr%d", i); |
| dev = alloc_netdev(0, name, nr_setup); |
| if (!dev) { |
| printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); |
| goto fail; |
| } |
| |
| dev->base_addr = i; |
| if (register_netdev(dev)) { |
| printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); |
| free_netdev(dev); |
| goto fail; |
| } |
| nr_set_lockdep_key(dev); |
| dev_nr[i] = dev; |
| } |
| |
| if (sock_register(&nr_family_ops)) { |
| printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); |
| goto fail; |
| } |
| |
| register_netdevice_notifier(&nr_dev_notifier); |
| |
| ax25_register_pid(&nr_pid); |
| ax25_linkfail_register(&nr_linkfail_notifier); |
| |
| #ifdef CONFIG_SYSCTL |
| nr_register_sysctl(); |
| #endif |
| |
| nr_loopback_init(); |
| |
| proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops); |
| proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops); |
| proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops); |
| out: |
| return rc; |
| fail: |
| while (--i >= 0) { |
| unregister_netdev(dev_nr[i]); |
| free_netdev(dev_nr[i]); |
| } |
| kfree(dev_nr); |
| proto_unregister(&nr_proto); |
| rc = -1; |
| goto out; |
| } |
| |
| module_init(nr_proto_init); |
| |
| module_param(nr_ndevs, int, 0); |
| MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); |
| |
| MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); |
| MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_NETPROTO(PF_NETROM); |
| |
| static void __exit nr_exit(void) |
| { |
| int i; |
| |
| proc_net_remove(&init_net, "nr"); |
| proc_net_remove(&init_net, "nr_neigh"); |
| proc_net_remove(&init_net, "nr_nodes"); |
| nr_loopback_clear(); |
| |
| nr_rt_free(); |
| |
| #ifdef CONFIG_SYSCTL |
| nr_unregister_sysctl(); |
| #endif |
| |
| ax25_linkfail_release(&nr_linkfail_notifier); |
| ax25_protocol_release(AX25_P_NETROM); |
| |
| unregister_netdevice_notifier(&nr_dev_notifier); |
| |
| sock_unregister(PF_NETROM); |
| |
| for (i = 0; i < nr_ndevs; i++) { |
| struct net_device *dev = dev_nr[i]; |
| if (dev) { |
| unregister_netdev(dev); |
| free_netdev(dev); |
| } |
| } |
| |
| kfree(dev_nr); |
| proto_unregister(&nr_proto); |
| } |
| module_exit(nr_exit); |