Release 4.11 net/netrom/af_netrom.c

/*
 * 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/slab.h>
#include <linux/kernel.h>
#include <linux/sched/signal.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 <linux/uaccess.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);
}

Contributors
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David S. Miller
31
100.00%
2
100.00%
Total
31
100.00%
2
100.00%



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);
}

Contributors
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CommitProp
David S. Miller
31
100.00%
3
100.00%
Total
31
100.00%
3
100.00%

/*
 *      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);
}

Contributors
Person
Tokens
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Commits
CommitProp
Linus Torvalds (pre-git)
21
75.00%
2
40.00%
Ralf Bächle
6
21.43%
2
40.00%
Arnaldo Carvalho de Melo
1
3.57%
1
20.00%
Total
28
100.00%
5
100.00%

/*
 *      Kill all bound sockets on a dropped device.
 */


static void nr_kill_by_device(struct net_device *dev)
{
	struct sock *s;

	spin_lock_bh(&nr_list_lock);
	sk_for_each(s, &nr_list)
		if (nr_sk(s)->device == dev)
			nr_disconnect(s, ENETUNREACH);
	spin_unlock_bh(&nr_list_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
31
59.62%
3
42.86%
Ralf Bächle
12
23.08%
2
28.57%
Arnaldo Carvalho de Melo
6
11.54%
1
14.29%
David S. Miller
3
5.77%
1
14.29%
Total
52
100.00%
7
100.00%

/*
 *      Handle device status changes.
 */


static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
48
70.59%
6
60.00%
Eric W. Biedermann
9
13.24%
1
10.00%
Hideaki Yoshifuji / 吉藤英明
8
11.76%
2
20.00%
Jiri Pirko
3
4.41%
1
10.00%
Total
68
100.00%
10
100.00%

/*
 *      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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
20
64.52%
2
40.00%
Ralf Bächle
6
19.35%
2
40.00%
Arnaldo Carvalho de Melo
5
16.13%
1
20.00%
Total
31
100.00%
5
100.00%

/*
 *      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;

	spin_lock_bh(&nr_list_lock);
	sk_for_each(s, &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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
43
56.58%
2
25.00%
Arnaldo Carvalho de Melo
16
21.05%
2
25.00%
Jeroen Vreeken
7
9.21%
1
12.50%
Ralf Bächle
6
7.89%
2
25.00%
David S. Miller
4
5.26%
1
12.50%
Total
76
100.00%
8
100.00%

/*
 *      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;

	spin_lock_bh(&nr_list_lock);
	sk_for_each(s, &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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
45
53.57%
3
33.33%
Arnaldo Carvalho de Melo
16
19.05%
1
11.11%
Ralf Bächle
8
9.52%
3
33.33%
David S. Miller
8
9.52%
1
11.11%
Jeroen Vreeken
7
8.33%
1
11.11%
Total
84
100.00%
9
100.00%

/*
 *      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;

	spin_lock_bh(&nr_list_lock);
	sk_for_each(s, &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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
59
59.60%
3
33.33%
Arnaldo Carvalho de Melo
16
16.16%
1
11.11%
David S. Miller
9
9.09%
1
11.11%
Ralf Bächle
8
8.08%
3
33.33%
Jeroen Vreeken
7
7.07%
1
11.11%
Total
99
100.00%
9
100.00%

/*
 *      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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
68
80.95%
1
50.00%
Jeroen Vreeken
16
19.05%
1
50.00%
Total
84
100.00%
2
100.00%

/*
 *      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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeroen Vreeken
29
61.70%
1
33.33%
Linus Torvalds (pre-git)
18
38.30%
2
66.67%
Total
47
100.00%
3
100.00%

/*
 *      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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
135
85.99%
6
40.00%
Arnaldo Carvalho de Melo
8
5.10%
2
13.33%
Vinay K. Nallamothu
4
2.55%
1
6.67%
David S. Miller
3
1.91%
1
6.67%
James Morris
2
1.27%
1
6.67%
Ralf Bächle
2
1.27%
1
6.67%
Jeroen Vreeken
2
1.27%
2
13.33%
Eric Dumazet
1
0.64%
1
6.67%
Total
157
100.00%
15
100.00%

/*
 *      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);
	unsigned long opt;

	if (level != SOL_NETROM)
		return -ENOPROTOOPT;

	if (optlen < sizeof(unsigned int))
		return -EINVAL;

	if (get_user(opt, (unsigned int __user *)optval))
		return -EFAULT;

	switch (optname) {
	case NETROM_T1:
		if (opt < 1 || opt > ULONG_MAX / HZ)
			return -EINVAL;
		nr->t1 = opt * HZ;
		return 0;

	case NETROM_T2:
		if (opt < 1 || opt > ULONG_MAX / HZ)
			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 || opt > ULONG_MAX / HZ)
			return -EINVAL;
		nr->t4 = opt * HZ;
		return 0;

	case NETROM_IDLE:
		if (opt > ULONG_MAX / (60 * HZ))
			return -EINVAL;
		nr->idle = opt * 60 * HZ;
		return 0;

	default:
		return -ENOPROTOOPT;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
205
81.67%
7
58.33%
Xi Wang
33
13.15%
1
8.33%
David S. Miller
9
3.59%
2
16.67%
Al Viro
2
0.80%
1
8.33%
Ralf Bächle
2
0.80%
1
8.33%
Total
251
100.00%
12
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
173
86.50%
9
60.00%
Linus Torvalds
15
7.50%
3
20.00%
David S. Miller
8
4.00%
1
6.67%
Al Viro
2
1.00%
1
6.67%
Ralf Bächle
2
1.00%
1
6.67%
Total
200
100.00%
15
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
60
73.17%
4
57.14%
Jeroen Vreeken
15
18.29%
1
14.29%
David S. Miller
4
4.88%
1
14.29%
Arnaldo Carvalho de Melo
3
3.66%
1
14.29%
Total
82
100.00%
7
100.00%


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,
		     int kern)
{
	struct sock *sk;
	struct nr_sock *nr;

	if (!net_eq(net, &init_net))
		return -EAFNOSUPPORT;

	if (sock->type != SOCK_SEQPACKET || protocol != 0)
		return -ESOCKTNOSUPPORT;

	sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto, kern);
	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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
148
70.14%
11
50.00%
Eric W. Biedermann
19
9.00%
2
9.09%
Ralf Bächle
17
8.06%
2
9.09%
Arnaldo Carvalho de Melo
10
4.74%
2
9.09%
Octavian Purdila
5
2.37%
1
4.55%
Pavel Emelyanov
4
1.90%
1
4.55%
David S. Miller
3
1.42%
1
4.55%
Eric Paris
3
1.42%
1
4.55%
Vinay K. Nallamothu
2
0.95%
1
4.55%
Total
211
100.00%
22
100.00%



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, 0);
	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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
171
72.46%
10
45.45%
Arnaldo Carvalho de Melo
22
9.32%
2
9.09%
David S. Miller
21
8.90%
1
4.55%
Thomas Graf
6
2.54%
2
9.09%
Pavel Emelyanov
4
1.69%
1
4.55%
Eric W. Biedermann
4
1.69%
2
9.09%
Ralf Bächle
3
1.27%
2
9.09%
Hideaki Yoshifuji / 吉藤英明
3
1.27%
1
4.55%
Vinay K. Nallamothu
2
0.85%
1
4.55%
Total
236
100.00%
22
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
136
75.14%
10
55.56%
Stephen Hemminger
10
5.52%
1
5.56%
Jeroen Vreeken
10
5.52%
1
5.56%
David S. Miller
10
5.52%
1
5.56%
Arnaldo Carvalho de Melo
6
3.31%
2
11.11%
Jarek Poplawski
5
2.76%
1
5.56%
Ralf Bächle
2
1.10%
1
5.56%
James Morris
2
1.10%
1
5.56%
Total
181
100.00%
18
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
252
67.56%
12
60.00%
Jeroen Vreeken
72
19.30%
1
5.00%
Ralf Bächle
27
7.24%
2
10.00%
Thomas Graf
10
2.68%
1
5.00%
David S. Miller
8
2.14%
1
5.00%
David Howells
2
0.54%
1
5.00%
Arnaldo Carvalho de Melo
1
0.27%
1
5.00%
Zhao Hongjiang
1
0.27%
1
5.00%
Total
373
100.00%
20
100.00%



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