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1526 lines
32 KiB
1526 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* |
|
* Copyright Jonathan Naylor G4KLX ([email protected]) |
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* Copyright Alan Cox GW4PTS ([email protected]) |
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* Copyright Darryl Miles G7LED ([email protected]) |
|
*/ |
|
#include <linux/module.h> |
|
#include <linux/moduleparam.h> |
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#include <linux/capability.h> |
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#include <linux/errno.h> |
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#include <linux/types.h> |
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#include <linux/socket.h> |
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#include <linux/in.h> |
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#include <linux/slab.h> |
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#include <linux/kernel.h> |
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#include <linux/sched/signal.h> |
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#include <linux/timer.h> |
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#include <linux/string.h> |
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#include <linux/sockios.h> |
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#include <linux/net.h> |
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#include <linux/stat.h> |
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#include <net/ax25.h> |
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#include <linux/inet.h> |
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#include <linux/netdevice.h> |
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#include <linux/if_arp.h> |
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#include <linux/skbuff.h> |
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#include <net/net_namespace.h> |
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#include <net/sock.h> |
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#include <linux/uaccess.h> |
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#include <linux/fcntl.h> |
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#include <linux/termios.h> /* For TIOCINQ/OUTQ */ |
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#include <linux/mm.h> |
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#include <linux/interrupt.h> |
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#include <linux/notifier.h> |
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#include <net/netrom.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <net/ip.h> |
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#include <net/tcp_states.h> |
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#include <net/arp.h> |
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#include <linux/init.h> |
|
|
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static int nr_ndevs = 4; |
|
|
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int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL; |
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int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS; |
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int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL; |
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int sysctl_netrom_transport_timeout = NR_DEFAULT_T1; |
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int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2; |
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int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2; |
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int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4; |
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int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW; |
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int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE; |
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int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING; |
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int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS; |
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int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
|
|
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static unsigned short circuit = 0x101; |
|
|
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static HLIST_HEAD(nr_list); |
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static DEFINE_SPINLOCK(nr_list_lock); |
|
|
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static const struct proto_ops nr_proto_ops; |
|
|
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/* |
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* NETROM network devices are virtual network devices encapsulating NETROM |
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* frames into AX.25 which will be sent through an AX.25 device, so form a |
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* special "super class" of normal net devices; split their locks off into a |
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* separate class since they always nest. |
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*/ |
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static struct lock_class_key nr_netdev_xmit_lock_key; |
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static struct lock_class_key nr_netdev_addr_lock_key; |
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|
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static void nr_set_lockdep_one(struct net_device *dev, |
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struct netdev_queue *txq, |
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void *_unused) |
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{ |
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lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key); |
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} |
|
|
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static void nr_set_lockdep_key(struct net_device *dev) |
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{ |
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lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key); |
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netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL); |
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} |
|
|
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/* |
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* Socket removal during an interrupt is now safe. |
|
*/ |
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static void nr_remove_socket(struct sock *sk) |
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{ |
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spin_lock_bh(&nr_list_lock); |
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sk_del_node_init(sk); |
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spin_unlock_bh(&nr_list_lock); |
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} |
|
|
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/* |
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* Kill all bound sockets on a dropped device. |
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*/ |
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static void nr_kill_by_device(struct net_device *dev) |
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{ |
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struct sock *s; |
|
|
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spin_lock_bh(&nr_list_lock); |
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sk_for_each(s, &nr_list) |
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if (nr_sk(s)->device == dev) |
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nr_disconnect(s, ENETUNREACH); |
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spin_unlock_bh(&nr_list_lock); |
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} |
|
|
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/* |
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* Handle device status changes. |
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*/ |
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static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
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{ |
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struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
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|
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if (!net_eq(dev_net(dev), &init_net)) |
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return NOTIFY_DONE; |
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|
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if (event != NETDEV_DOWN) |
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return NOTIFY_DONE; |
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|
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nr_kill_by_device(dev); |
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nr_rt_device_down(dev); |
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|
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return NOTIFY_DONE; |
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} |
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|
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/* |
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* Add a socket to the bound sockets list. |
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*/ |
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static void nr_insert_socket(struct sock *sk) |
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{ |
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spin_lock_bh(&nr_list_lock); |
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sk_add_node(sk, &nr_list); |
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spin_unlock_bh(&nr_list_lock); |
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} |
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|
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/* |
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* Find a socket that wants to accept the Connect Request we just |
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* received. |
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*/ |
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static struct sock *nr_find_listener(ax25_address *addr) |
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{ |
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struct sock *s; |
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|
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spin_lock_bh(&nr_list_lock); |
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sk_for_each(s, &nr_list) |
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if (!ax25cmp(&nr_sk(s)->source_addr, addr) && |
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s->sk_state == TCP_LISTEN) { |
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sock_hold(s); |
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goto found; |
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} |
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s = NULL; |
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found: |
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spin_unlock_bh(&nr_list_lock); |
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return s; |
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} |
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|
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/* |
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* Find a connected NET/ROM socket given my circuit IDs. |
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*/ |
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static struct sock *nr_find_socket(unsigned char index, unsigned char id) |
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{ |
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struct sock *s; |
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|
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spin_lock_bh(&nr_list_lock); |
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sk_for_each(s, &nr_list) { |
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struct nr_sock *nr = nr_sk(s); |
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|
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if (nr->my_index == index && nr->my_id == id) { |
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sock_hold(s); |
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goto found; |
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} |
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} |
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s = NULL; |
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found: |
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spin_unlock_bh(&nr_list_lock); |
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return s; |
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} |
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|
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/* |
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* Find a connected NET/ROM socket given their circuit IDs. |
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*/ |
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static struct sock *nr_find_peer(unsigned char index, unsigned char id, |
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ax25_address *dest) |
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{ |
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struct sock *s; |
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|
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spin_lock_bh(&nr_list_lock); |
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sk_for_each(s, &nr_list) { |
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struct nr_sock *nr = nr_sk(s); |
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|
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if (nr->your_index == index && nr->your_id == id && |
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!ax25cmp(&nr->dest_addr, dest)) { |
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sock_hold(s); |
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goto found; |
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} |
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} |
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s = NULL; |
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found: |
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spin_unlock_bh(&nr_list_lock); |
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return s; |
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} |
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|
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/* |
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* Find next free circuit ID. |
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*/ |
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static unsigned short nr_find_next_circuit(void) |
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{ |
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unsigned short id = circuit; |
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unsigned char i, j; |
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struct sock *sk; |
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|
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for (;;) { |
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i = id / 256; |
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j = id % 256; |
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|
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if (i != 0 && j != 0) { |
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if ((sk=nr_find_socket(i, j)) == NULL) |
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break; |
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sock_put(sk); |
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} |
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id++; |
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} |
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|
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return id; |
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} |
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|
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/* |
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* Deferred destroy. |
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*/ |
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void nr_destroy_socket(struct sock *); |
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|
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/* |
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* Handler for deferred kills. |
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*/ |
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static void nr_destroy_timer(struct timer_list *t) |
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{ |
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struct sock *sk = from_timer(sk, t, sk_timer); |
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bh_lock_sock(sk); |
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sock_hold(sk); |
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nr_destroy_socket(sk); |
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bh_unlock_sock(sk); |
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sock_put(sk); |
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} |
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|
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/* |
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* This is called from user mode and the timers. Thus it protects itself |
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* against interrupt users but doesn't worry about being called during |
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* work. Once it is removed from the queue no interrupt or bottom half |
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* will touch it and we are (fairly 8-) ) safe. |
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*/ |
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void nr_destroy_socket(struct sock *sk) |
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{ |
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struct sk_buff *skb; |
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|
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nr_remove_socket(sk); |
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|
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nr_stop_heartbeat(sk); |
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nr_stop_t1timer(sk); |
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nr_stop_t2timer(sk); |
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nr_stop_t4timer(sk); |
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nr_stop_idletimer(sk); |
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nr_clear_queues(sk); /* Flush the queues */ |
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while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
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if (skb->sk != sk) { /* A pending connection */ |
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/* Queue the unaccepted socket for death */ |
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sock_set_flag(skb->sk, SOCK_DEAD); |
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nr_start_heartbeat(skb->sk); |
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nr_sk(skb->sk)->state = NR_STATE_0; |
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} |
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kfree_skb(skb); |
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} |
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if (sk_has_allocations(sk)) { |
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/* Defer: outstanding buffers */ |
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sk->sk_timer.function = nr_destroy_timer; |
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sk->sk_timer.expires = jiffies + 2 * HZ; |
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add_timer(&sk->sk_timer); |
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} else |
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sock_put(sk); |
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} |
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|
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/* |
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* Handling for system calls applied via the various interfaces to a |
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* NET/ROM socket object. |
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*/ |
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|
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static int nr_setsockopt(struct socket *sock, int level, int optname, |
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sockptr_t optval, unsigned int optlen) |
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{ |
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struct sock *sk = sock->sk; |
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struct nr_sock *nr = nr_sk(sk); |
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unsigned long opt; |
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|
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if (level != SOL_NETROM) |
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return -ENOPROTOOPT; |
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if (optlen < sizeof(unsigned int)) |
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return -EINVAL; |
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if (copy_from_sockptr(&opt, optval, sizeof(unsigned int))) |
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return -EFAULT; |
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switch (optname) { |
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case NETROM_T1: |
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if (opt < 1 || opt > ULONG_MAX / HZ) |
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return -EINVAL; |
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nr->t1 = opt * HZ; |
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return 0; |
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|
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case NETROM_T2: |
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if (opt < 1 || opt > ULONG_MAX / HZ) |
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return -EINVAL; |
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nr->t2 = opt * HZ; |
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return 0; |
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|
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case NETROM_N2: |
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if (opt < 1 || opt > 31) |
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return -EINVAL; |
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nr->n2 = opt; |
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return 0; |
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|
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case NETROM_T4: |
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if (opt < 1 || opt > ULONG_MAX / HZ) |
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return -EINVAL; |
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nr->t4 = opt * HZ; |
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return 0; |
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|
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case NETROM_IDLE: |
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if (opt > ULONG_MAX / (60 * HZ)) |
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return -EINVAL; |
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nr->idle = opt * 60 * HZ; |
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return 0; |
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|
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default: |
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return -ENOPROTOOPT; |
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} |
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} |
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|
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static int nr_getsockopt(struct socket *sock, int level, int optname, |
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char __user *optval, int __user *optlen) |
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{ |
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struct sock *sk = sock->sk; |
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struct nr_sock *nr = nr_sk(sk); |
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int val = 0; |
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int len; |
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|
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if (level != SOL_NETROM) |
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return -ENOPROTOOPT; |
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|
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if (get_user(len, optlen)) |
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return -EFAULT; |
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|
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if (len < 0) |
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return -EINVAL; |
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|
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switch (optname) { |
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case NETROM_T1: |
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val = nr->t1 / HZ; |
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break; |
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|
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case NETROM_T2: |
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val = nr->t2 / HZ; |
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break; |
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|
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case NETROM_N2: |
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val = nr->n2; |
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break; |
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|
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case NETROM_T4: |
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val = nr->t4 / HZ; |
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break; |
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|
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case NETROM_IDLE: |
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val = nr->idle / (60 * HZ); |
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break; |
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|
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default: |
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return -ENOPROTOOPT; |
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} |
|
|
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len = min_t(unsigned int, len, sizeof(int)); |
|
|
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if (put_user(len, optlen)) |
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return -EFAULT; |
|
|
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return copy_to_user(optval, &val, len) ? -EFAULT : 0; |
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} |
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|
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static int nr_listen(struct socket *sock, int backlog) |
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{ |
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struct sock *sk = sock->sk; |
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|
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lock_sock(sk); |
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if (sk->sk_state != TCP_LISTEN) { |
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memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); |
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sk->sk_max_ack_backlog = backlog; |
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sk->sk_state = TCP_LISTEN; |
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release_sock(sk); |
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return 0; |
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} |
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release_sock(sk); |
|
|
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return -EOPNOTSUPP; |
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} |
|
|
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static struct proto nr_proto = { |
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.name = "NETROM", |
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.owner = THIS_MODULE, |
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.obj_size = sizeof(struct nr_sock), |
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}; |
|
|
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static int nr_create(struct net *net, struct socket *sock, int protocol, |
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int kern) |
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{ |
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struct sock *sk; |
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struct nr_sock *nr; |
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|
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if (!net_eq(net, &init_net)) |
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return -EAFNOSUPPORT; |
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|
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if (sock->type != SOCK_SEQPACKET || protocol != 0) |
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return -ESOCKTNOSUPPORT; |
|
|
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sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto, kern); |
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if (sk == NULL) |
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return -ENOMEM; |
|
|
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nr = nr_sk(sk); |
|
|
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sock_init_data(sock, sk); |
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|
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sock->ops = &nr_proto_ops; |
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sk->sk_protocol = protocol; |
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|
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skb_queue_head_init(&nr->ack_queue); |
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skb_queue_head_init(&nr->reseq_queue); |
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skb_queue_head_init(&nr->frag_queue); |
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|
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nr_init_timers(sk); |
|
|
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nr->t1 = |
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msecs_to_jiffies(sysctl_netrom_transport_timeout); |
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nr->t2 = |
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msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); |
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nr->n2 = |
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msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); |
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nr->t4 = |
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msecs_to_jiffies(sysctl_netrom_transport_busy_delay); |
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nr->idle = |
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msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); |
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nr->window = sysctl_netrom_transport_requested_window_size; |
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|
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nr->bpqext = 1; |
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nr->state = NR_STATE_0; |
|
|
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return 0; |
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} |
|
|
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static struct sock *nr_make_new(struct sock *osk) |
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{ |
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struct sock *sk; |
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struct nr_sock *nr, *onr; |
|
|
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if (osk->sk_type != SOCK_SEQPACKET) |
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return NULL; |
|
|
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sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot, 0); |
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if (sk == NULL) |
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return NULL; |
|
|
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nr = nr_sk(sk); |
|
|
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sock_init_data(NULL, sk); |
|
|
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sk->sk_type = osk->sk_type; |
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sk->sk_priority = osk->sk_priority; |
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sk->sk_protocol = osk->sk_protocol; |
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sk->sk_rcvbuf = osk->sk_rcvbuf; |
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sk->sk_sndbuf = osk->sk_sndbuf; |
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sk->sk_state = TCP_ESTABLISHED; |
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sock_copy_flags(sk, osk); |
|
|
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skb_queue_head_init(&nr->ack_queue); |
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skb_queue_head_init(&nr->reseq_queue); |
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skb_queue_head_init(&nr->frag_queue); |
|
|
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nr_init_timers(sk); |
|
|
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onr = nr_sk(osk); |
|
|
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nr->t1 = onr->t1; |
|
nr->t2 = onr->t2; |
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nr->n2 = onr->n2; |
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nr->t4 = onr->t4; |
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nr->idle = onr->idle; |
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nr->window = onr->window; |
|
|
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nr->device = onr->device; |
|
nr->bpqext = onr->bpqext; |
|
|
|
return sk; |
|
} |
|
|
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static int nr_release(struct socket *sock) |
|
{ |
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struct sock *sk = sock->sk; |
|
struct nr_sock *nr; |
|
|
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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) { |
|
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 -EPERM; |
|
} |
|
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); |
|
|
|
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_sleep(sk), &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_sleep(sk), &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, |
|
bool kern) |
|
{ |
|
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_sleep(sk), &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_sleep(sk), &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 peer) |
|
{ |
|
struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; |
|
struct sock *sk = sock->sk; |
|
struct nr_sock *nr = nr_sk(sk); |
|
int uaddr_len; |
|
|
|
memset(&sax->fsa_ax25, 0, sizeof(struct sockaddr_ax25)); |
|
|
|
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 uaddr_len; |
|
} |
|
|
|
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_orphan(skb); |
|
|
|
/* |
|
* 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) { |
|
bh_lock_sock(sk); |
|
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); |
|
sock_put(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) |
|
sock_put(sk); |
|
return 0; |
|
} |
|
|
|
bh_lock_sock(sk); |
|
|
|
window = skb->data[20]; |
|
|
|
sock_hold(make); |
|
skb->sk = make; |
|
skb->destructor = sock_efree; |
|
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); |
|
|
|
bh_unlock_sock(sk); |
|
sock_put(sk); |
|
|
|
nr_insert_socket(make); |
|
|
|
nr_start_heartbeat(make); |
|
nr_start_idletimer(make); |
|
|
|
return 1; |
|
} |
|
|
|
static int nr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
|
{ |
|
struct sock *sk = sock->sk; |
|
struct nr_sock *nr = nr_sk(sk); |
|
DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, 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; |
|
} |
|
|
|
/* 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; |
|
} |
|
|
|
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); |
|
|
|
/* 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; |
|
|
|
/* |
|
* Put the data on the end |
|
*/ |
|
skb_put(skb, len); |
|
|
|
/* User data follows immediately after the NET/ROM transport header */ |
|
if (memcpy_from_msg(skb_transport_header(skb), msg, len)) { |
|
kfree_skb(skb); |
|
err = -EFAULT; |
|
goto out; |
|
} |
|
|
|
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 socket *sock, struct msghdr *msg, size_t size, |
|
int flags) |
|
{ |
|
struct sock *sk = sock->sk; |
|
DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, 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; |
|
} |
|
|
|
er = skb_copy_datagram_msg(skb, 0, msg, copied); |
|
if (er < 0) { |
|
skb_free_datagram(sk, skb); |
|
release_sock(sk); |
|
return er; |
|
} |
|
|
|
if (sax != NULL) { |
|
memset(sax, 0, sizeof(*sax)); |
|
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; |
|
|
|
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 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) |
|
__acquires(&nr_list_lock) |
|
{ |
|
spin_lock_bh(&nr_list_lock); |
|
return seq_hlist_start_head(&nr_list, *pos); |
|
} |
|
|
|
static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) |
|
{ |
|
return seq_hlist_next(v, &nr_list, pos); |
|
} |
|
|
|
static void nr_info_stop(struct seq_file *seq, void *v) |
|
__releases(&nr_list_lock) |
|
{ |
|
spin_unlock_bh(&nr_list_lock); |
|
} |
|
|
|
static int nr_info_show(struct seq_file *seq, void *v) |
|
{ |
|
struct sock *s = sk_entry(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, |
|
}; |
|
#endif /* CONFIG_PROC_FS */ |
|
|
|
static const 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, |
|
.gettstamp = sock_gettstamp, |
|
.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) |
|
return rc; |
|
|
|
if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { |
|
pr_err("NET/ROM: %s - nr_ndevs parameter too large\n", |
|
__func__); |
|
rc = -EINVAL; |
|
goto unregister_proto; |
|
} |
|
|
|
dev_nr = kcalloc(nr_ndevs, sizeof(struct net_device *), GFP_KERNEL); |
|
if (!dev_nr) { |
|
pr_err("NET/ROM: %s - unable to allocate device array\n", |
|
__func__); |
|
rc = -ENOMEM; |
|
goto unregister_proto; |
|
} |
|
|
|
for (i = 0; i < nr_ndevs; i++) { |
|
char name[IFNAMSIZ]; |
|
struct net_device *dev; |
|
|
|
sprintf(name, "nr%d", i); |
|
dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, nr_setup); |
|
if (!dev) { |
|
rc = -ENOMEM; |
|
goto fail; |
|
} |
|
|
|
dev->base_addr = i; |
|
rc = register_netdev(dev); |
|
if (rc) { |
|
free_netdev(dev); |
|
goto fail; |
|
} |
|
nr_set_lockdep_key(dev); |
|
dev_nr[i] = dev; |
|
} |
|
|
|
rc = sock_register(&nr_family_ops); |
|
if (rc) |
|
goto fail; |
|
|
|
rc = register_netdevice_notifier(&nr_dev_notifier); |
|
if (rc) |
|
goto out_sock; |
|
|
|
ax25_register_pid(&nr_pid); |
|
ax25_linkfail_register(&nr_linkfail_notifier); |
|
|
|
#ifdef CONFIG_SYSCTL |
|
rc = nr_register_sysctl(); |
|
if (rc) |
|
goto out_sysctl; |
|
#endif |
|
|
|
nr_loopback_init(); |
|
|
|
rc = -ENOMEM; |
|
if (!proc_create_seq("nr", 0444, init_net.proc_net, &nr_info_seqops)) |
|
goto proc_remove1; |
|
if (!proc_create_seq("nr_neigh", 0444, init_net.proc_net, |
|
&nr_neigh_seqops)) |
|
goto proc_remove2; |
|
if (!proc_create_seq("nr_nodes", 0444, init_net.proc_net, |
|
&nr_node_seqops)) |
|
goto proc_remove3; |
|
|
|
return 0; |
|
|
|
proc_remove3: |
|
remove_proc_entry("nr_neigh", init_net.proc_net); |
|
proc_remove2: |
|
remove_proc_entry("nr", init_net.proc_net); |
|
proc_remove1: |
|
|
|
nr_loopback_clear(); |
|
nr_rt_free(); |
|
|
|
#ifdef CONFIG_SYSCTL |
|
nr_unregister_sysctl(); |
|
out_sysctl: |
|
#endif |
|
ax25_linkfail_release(&nr_linkfail_notifier); |
|
ax25_protocol_release(AX25_P_NETROM); |
|
unregister_netdevice_notifier(&nr_dev_notifier); |
|
out_sock: |
|
sock_unregister(PF_NETROM); |
|
fail: |
|
while (--i >= 0) { |
|
unregister_netdev(dev_nr[i]); |
|
free_netdev(dev_nr[i]); |
|
} |
|
kfree(dev_nr); |
|
unregister_proto: |
|
proto_unregister(&nr_proto); |
|
return rc; |
|
} |
|
|
|
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 <[email protected]>"); |
|
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; |
|
|
|
remove_proc_entry("nr", init_net.proc_net); |
|
remove_proc_entry("nr_neigh", init_net.proc_net); |
|
remove_proc_entry("nr_nodes", init_net.proc_net); |
|
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);
|
|
|