Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
new file mode 100644
index 0000000..33b1a37
--- /dev/null
+++ b/net/ax25/af_ax25.c
@@ -0,0 +1,2050 @@
+/*
+ * 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 (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
+ * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
+ * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
+ * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
+ * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
+ * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
+ * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
+ * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
+ */
+#include <linux/config.h>
+#include <linux/module.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/smp_lock.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.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 <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/netfilter.h>
+#include <linux/sysctl.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <net/tcp.h>
+#include <net/ip.h>
+#include <net/arp.h>
+
+
+
+HLIST_HEAD(ax25_list);
+DEFINE_SPINLOCK(ax25_list_lock);
+
+static struct proto_ops ax25_proto_ops;
+
+static void ax25_free_sock(struct sock *sk)
+{
+ ax25_cb_put(ax25_sk(sk));
+}
+
+/*
+ * Socket removal during an interrupt is now safe.
+ */
+static void ax25_cb_del(ax25_cb *ax25)
+{
+ if (!hlist_unhashed(&ax25->ax25_node)) {
+ spin_lock_bh(&ax25_list_lock);
+ hlist_del_init(&ax25->ax25_node);
+ spin_unlock_bh(&ax25_list_lock);
+ ax25_cb_put(ax25);
+ }
+}
+
+/*
+ * Kill all bound sockets on a dropped device.
+ */
+static void ax25_kill_by_device(struct net_device *dev)
+{
+ ax25_dev *ax25_dev;
+ ax25_cb *s;
+ struct hlist_node *node;
+
+ if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+ return;
+
+ spin_lock_bh(&ax25_list_lock);
+ ax25_for_each(s, node, &ax25_list) {
+ if (s->ax25_dev == ax25_dev) {
+ s->ax25_dev = NULL;
+ ax25_disconnect(s, ENETUNREACH);
+ }
+ }
+ spin_unlock_bh(&ax25_list_lock);
+}
+
+/*
+ * Handle device status changes.
+ */
+static int ax25_device_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct net_device *dev = (struct net_device *)ptr;
+
+ /* Reject non AX.25 devices */
+ if (dev->type != ARPHRD_AX25)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_UP:
+ ax25_dev_device_up(dev);
+ break;
+ case NETDEV_DOWN:
+ ax25_kill_by_device(dev);
+ ax25_rt_device_down(dev);
+ ax25_dev_device_down(dev);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Add a socket to the bound sockets list.
+ */
+void ax25_cb_add(ax25_cb *ax25)
+{
+ spin_lock_bh(&ax25_list_lock);
+ ax25_cb_hold(ax25);
+ hlist_add_head(&ax25->ax25_node, &ax25_list);
+ spin_unlock_bh(&ax25_list_lock);
+}
+
+/*
+ * Find a socket that wants to accept the SABM we have just
+ * received.
+ */
+struct sock *ax25_find_listener(ax25_address *addr, int digi,
+ struct net_device *dev, int type)
+{
+ ax25_cb *s;
+ struct hlist_node *node;
+
+ spin_lock_bh(&ax25_list_lock);
+ ax25_for_each(s, node, &ax25_list) {
+ if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
+ continue;
+ if (s->sk && !ax25cmp(&s->source_addr, addr) &&
+ s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
+ /* If device is null we match any device */
+ if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
+ sock_hold(s->sk);
+ spin_unlock_bh(&ax25_list_lock);
+ return s->sk;
+ }
+ }
+ }
+ spin_unlock_bh(&ax25_list_lock);
+
+ return NULL;
+}
+
+/*
+ * Find an AX.25 socket given both ends.
+ */
+struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
+ int type)
+{
+ struct sock *sk = NULL;
+ ax25_cb *s;
+ struct hlist_node *node;
+
+ spin_lock_bh(&ax25_list_lock);
+ ax25_for_each(s, node, &ax25_list) {
+ if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
+ !ax25cmp(&s->dest_addr, dest_addr) &&
+ s->sk->sk_type == type) {
+ sk = s->sk;
+ sock_hold(sk);
+ break;
+ }
+ }
+
+ spin_unlock_bh(&ax25_list_lock);
+
+ return sk;
+}
+
+/*
+ * Find an AX.25 control block given both ends. It will only pick up
+ * floating AX.25 control blocks or non Raw socket bound control blocks.
+ */
+ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
+ ax25_digi *digi, struct net_device *dev)
+{
+ ax25_cb *s;
+ struct hlist_node *node;
+
+ spin_lock_bh(&ax25_list_lock);
+ ax25_for_each(s, node, &ax25_list) {
+ if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
+ continue;
+ if (s->ax25_dev == NULL)
+ continue;
+ if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
+ if (digi != NULL && digi->ndigi != 0) {
+ if (s->digipeat == NULL)
+ continue;
+ if (ax25digicmp(s->digipeat, digi) != 0)
+ continue;
+ } else {
+ if (s->digipeat != NULL && s->digipeat->ndigi != 0)
+ continue;
+ }
+ ax25_cb_hold(s);
+ spin_unlock_bh(&ax25_list_lock);
+
+ return s;
+ }
+ }
+ spin_unlock_bh(&ax25_list_lock);
+
+ return NULL;
+}
+
+void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
+{
+ ax25_cb *s;
+ struct sk_buff *copy;
+ struct hlist_node *node;
+
+ spin_lock_bh(&ax25_list_lock);
+ ax25_for_each(s, node, &ax25_list) {
+ if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
+ s->sk->sk_type == SOCK_RAW &&
+ s->sk->sk_protocol == proto &&
+ s->ax25_dev->dev == skb->dev &&
+ atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
+ if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
+ continue;
+ if (sock_queue_rcv_skb(s->sk, copy) != 0)
+ kfree_skb(copy);
+ }
+ }
+ spin_unlock_bh(&ax25_list_lock);
+}
+
+/*
+ * Deferred destroy.
+ */
+void ax25_destroy_socket(ax25_cb *);
+
+/*
+ * Handler for deferred kills.
+ */
+static void ax25_destroy_timer(unsigned long data)
+{
+ ax25_cb *ax25=(ax25_cb *)data;
+ struct sock *sk;
+
+ sk=ax25->sk;
+
+ bh_lock_sock(sk);
+ sock_hold(sk);
+ ax25_destroy_socket(ax25);
+ 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 ax25_destroy_socket(ax25_cb *ax25)
+{
+ struct sk_buff *skb;
+
+ ax25_cb_del(ax25);
+
+ ax25_stop_heartbeat(ax25);
+ ax25_stop_t1timer(ax25);
+ ax25_stop_t2timer(ax25);
+ ax25_stop_t3timer(ax25);
+ ax25_stop_idletimer(ax25);
+
+ ax25_clear_queues(ax25); /* Flush the queues */
+
+ if (ax25->sk != NULL) {
+ while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
+ if (skb->sk != ax25->sk) {
+ /* A pending connection */
+ ax25_cb *sax25 = ax25_sk(skb->sk);
+
+ /* Queue the unaccepted socket for death */
+ sock_orphan(skb->sk);
+
+ ax25_start_heartbeat(sax25);
+ sax25->state = AX25_STATE_0;
+ }
+
+ kfree_skb(skb);
+ }
+ skb_queue_purge(&ax25->sk->sk_write_queue);
+ }
+
+ if (ax25->sk != NULL) {
+ if (atomic_read(&ax25->sk->sk_wmem_alloc) ||
+ atomic_read(&ax25->sk->sk_rmem_alloc)) {
+ /* Defer: outstanding buffers */
+ init_timer(&ax25->dtimer);
+ ax25->dtimer.expires = jiffies + 2 * HZ;
+ ax25->dtimer.function = ax25_destroy_timer;
+ ax25->dtimer.data = (unsigned long)ax25;
+ add_timer(&ax25->dtimer);
+ } else {
+ struct sock *sk=ax25->sk;
+ ax25->sk=NULL;
+ sock_put(sk);
+ }
+ } else {
+ ax25_cb_put(ax25);
+ }
+}
+
+/*
+ * dl1bke 960311: set parameters for existing AX.25 connections,
+ * includes a KILL command to abort any connection.
+ * VERY useful for debugging ;-)
+ */
+static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
+{
+ struct ax25_ctl_struct ax25_ctl;
+ ax25_digi digi;
+ ax25_dev *ax25_dev;
+ ax25_cb *ax25;
+ unsigned int k;
+
+ if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
+ return -EFAULT;
+
+ if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
+ return -ENODEV;
+
+ if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
+ return -EINVAL;
+
+ digi.ndigi = ax25_ctl.digi_count;
+ for (k = 0; k < digi.ndigi; k++)
+ digi.calls[k] = ax25_ctl.digi_addr[k];
+
+ if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
+ return -ENOTCONN;
+
+ switch (ax25_ctl.cmd) {
+ case AX25_KILL:
+ ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
+#ifdef CONFIG_AX25_DAMA_SLAVE
+ if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
+ ax25_dama_off(ax25);
+#endif
+ ax25_disconnect(ax25, ENETRESET);
+ break;
+
+ case AX25_WINDOW:
+ if (ax25->modulus == AX25_MODULUS) {
+ if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
+ return -EINVAL;
+ } else {
+ if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
+ return -EINVAL;
+ }
+ ax25->window = ax25_ctl.arg;
+ break;
+
+ case AX25_T1:
+ if (ax25_ctl.arg < 1)
+ return -EINVAL;
+ ax25->rtt = (ax25_ctl.arg * HZ) / 2;
+ ax25->t1 = ax25_ctl.arg * HZ;
+ break;
+
+ case AX25_T2:
+ if (ax25_ctl.arg < 1)
+ return -EINVAL;
+ ax25->t2 = ax25_ctl.arg * HZ;
+ break;
+
+ case AX25_N2:
+ if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
+ return -EINVAL;
+ ax25->n2count = 0;
+ ax25->n2 = ax25_ctl.arg;
+ break;
+
+ case AX25_T3:
+ if (ax25_ctl.arg < 0)
+ return -EINVAL;
+ ax25->t3 = ax25_ctl.arg * HZ;
+ break;
+
+ case AX25_IDLE:
+ if (ax25_ctl.arg < 0)
+ return -EINVAL;
+ ax25->idle = ax25_ctl.arg * 60 * HZ;
+ break;
+
+ case AX25_PACLEN:
+ if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
+ return -EINVAL;
+ ax25->paclen = ax25_ctl.arg;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Fill in a created AX.25 created control block with the default
+ * values for a particular device.
+ */
+void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
+{
+ ax25->ax25_dev = ax25_dev;
+
+ if (ax25->ax25_dev != NULL) {
+ ax25->rtt = ax25_dev->values[AX25_VALUES_T1] / 2;
+ ax25->t1 = ax25_dev->values[AX25_VALUES_T1];
+ ax25->t2 = ax25_dev->values[AX25_VALUES_T2];
+ ax25->t3 = ax25_dev->values[AX25_VALUES_T3];
+ ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
+ ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
+ ax25->idle = ax25_dev->values[AX25_VALUES_IDLE];
+ ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
+
+ if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
+ ax25->modulus = AX25_EMODULUS;
+ ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
+ } else {
+ ax25->modulus = AX25_MODULUS;
+ ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
+ }
+ } else {
+ ax25->rtt = AX25_DEF_T1 / 2;
+ ax25->t1 = AX25_DEF_T1;
+ ax25->t2 = AX25_DEF_T2;
+ ax25->t3 = AX25_DEF_T3;
+ ax25->n2 = AX25_DEF_N2;
+ ax25->paclen = AX25_DEF_PACLEN;
+ ax25->idle = AX25_DEF_IDLE;
+ ax25->backoff = AX25_DEF_BACKOFF;
+
+ if (AX25_DEF_AXDEFMODE) {
+ ax25->modulus = AX25_EMODULUS;
+ ax25->window = AX25_DEF_EWINDOW;
+ } else {
+ ax25->modulus = AX25_MODULUS;
+ ax25->window = AX25_DEF_WINDOW;
+ }
+ }
+}
+
+/*
+ * Create an empty AX.25 control block.
+ */
+ax25_cb *ax25_create_cb(void)
+{
+ ax25_cb *ax25;
+
+ if ((ax25 = kmalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
+ return NULL;
+
+ memset(ax25, 0x00, sizeof(*ax25));
+ atomic_set(&ax25->refcount, 1);
+
+ skb_queue_head_init(&ax25->write_queue);
+ skb_queue_head_init(&ax25->frag_queue);
+ skb_queue_head_init(&ax25->ack_queue);
+ skb_queue_head_init(&ax25->reseq_queue);
+
+ init_timer(&ax25->timer);
+ init_timer(&ax25->t1timer);
+ init_timer(&ax25->t2timer);
+ init_timer(&ax25->t3timer);
+ init_timer(&ax25->idletimer);
+
+ ax25_fillin_cb(ax25, NULL);
+
+ ax25->state = AX25_STATE_0;
+
+ return ax25;
+}
+
+/*
+ * Handling for system calls applied via the various interfaces to an
+ * AX25 socket object
+ */
+
+static int ax25_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct sock *sk = sock->sk;
+ ax25_cb *ax25;
+ struct net_device *dev;
+ char devname[IFNAMSIZ];
+ int opt, res = 0;
+
+ if (level != SOL_AX25)
+ return -ENOPROTOOPT;
+
+ if (optlen < sizeof(int))
+ return -EINVAL;
+
+ if (get_user(opt, (int __user *)optval))
+ return -EFAULT;
+
+ lock_sock(sk);
+ ax25 = ax25_sk(sk);
+
+ switch (optname) {
+ case AX25_WINDOW:
+ if (ax25->modulus == AX25_MODULUS) {
+ if (opt < 1 || opt > 7) {
+ res = -EINVAL;
+ break;
+ }
+ } else {
+ if (opt < 1 || opt > 63) {
+ res = -EINVAL;
+ break;
+ }
+ }
+ ax25->window = opt;
+ break;
+
+ case AX25_T1:
+ if (opt < 1) {
+ res = -EINVAL;
+ break;
+ }
+ ax25->rtt = (opt * HZ) / 2;
+ ax25->t1 = opt * HZ;
+ break;
+
+ case AX25_T2:
+ if (opt < 1) {
+ res = -EINVAL;
+ break;
+ }
+ ax25->t2 = opt * HZ;
+ break;
+
+ case AX25_N2:
+ if (opt < 1 || opt > 31) {
+ res = -EINVAL;
+ break;
+ }
+ ax25->n2 = opt;
+ break;
+
+ case AX25_T3:
+ if (opt < 1) {
+ res = -EINVAL;
+ break;
+ }
+ ax25->t3 = opt * HZ;
+ break;
+
+ case AX25_IDLE:
+ if (opt < 0) {
+ res = -EINVAL;
+ break;
+ }
+ ax25->idle = opt * 60 * HZ;
+ break;
+
+ case AX25_BACKOFF:
+ if (opt < 0 || opt > 2) {
+ res = -EINVAL;
+ break;
+ }
+ ax25->backoff = opt;
+ break;
+
+ case AX25_EXTSEQ:
+ ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
+ break;
+
+ case AX25_PIDINCL:
+ ax25->pidincl = opt ? 1 : 0;
+ break;
+
+ case AX25_IAMDIGI:
+ ax25->iamdigi = opt ? 1 : 0;
+ break;
+
+ case AX25_PACLEN:
+ if (opt < 16 || opt > 65535) {
+ res = -EINVAL;
+ break;
+ }
+ ax25->paclen = opt;
+ break;
+
+ case SO_BINDTODEVICE:
+ if (optlen > IFNAMSIZ)
+ optlen=IFNAMSIZ;
+ if (copy_from_user(devname, optval, optlen)) {
+ res = -EFAULT;
+ break;
+ }
+
+ dev = dev_get_by_name(devname);
+ if (dev == NULL) {
+ res = -ENODEV;
+ break;
+ }
+
+ if (sk->sk_type == SOCK_SEQPACKET &&
+ (sock->state != SS_UNCONNECTED ||
+ sk->sk_state == TCP_LISTEN)) {
+ res = -EADDRNOTAVAIL;
+ dev_put(dev);
+ break;
+ }
+
+ ax25->ax25_dev = ax25_dev_ax25dev(dev);
+ ax25_fillin_cb(ax25, ax25->ax25_dev);
+ break;
+
+ default:
+ res = -ENOPROTOOPT;
+ }
+ release_sock(sk);
+
+ return res;
+}
+
+static int ax25_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ ax25_cb *ax25;
+ struct ax25_dev *ax25_dev;
+ char devname[IFNAMSIZ];
+ void *valptr;
+ int val = 0;
+ int maxlen, length;
+
+ if (level != SOL_AX25)
+ return -ENOPROTOOPT;
+
+ if (get_user(maxlen, optlen))
+ return -EFAULT;
+
+ if (maxlen < 1)
+ return -EFAULT;
+
+ valptr = (void *) &val;
+ length = min_t(unsigned int, maxlen, sizeof(int));
+
+ lock_sock(sk);
+ ax25 = ax25_sk(sk);
+
+ switch (optname) {
+ case AX25_WINDOW:
+ val = ax25->window;
+ break;
+
+ case AX25_T1:
+ val = ax25->t1 / HZ;
+ break;
+
+ case AX25_T2:
+ val = ax25->t2 / HZ;
+ break;
+
+ case AX25_N2:
+ val = ax25->n2;
+ break;
+
+ case AX25_T3:
+ val = ax25->t3 / HZ;
+ break;
+
+ case AX25_IDLE:
+ val = ax25->idle / (60 * HZ);
+ break;
+
+ case AX25_BACKOFF:
+ val = ax25->backoff;
+ break;
+
+ case AX25_EXTSEQ:
+ val = (ax25->modulus == AX25_EMODULUS);
+ break;
+
+ case AX25_PIDINCL:
+ val = ax25->pidincl;
+ break;
+
+ case AX25_IAMDIGI:
+ val = ax25->iamdigi;
+ break;
+
+ case AX25_PACLEN:
+ val = ax25->paclen;
+ break;
+
+ case SO_BINDTODEVICE:
+ ax25_dev = ax25->ax25_dev;
+
+ if (ax25_dev != NULL && ax25_dev->dev != NULL) {
+ strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
+ length = strlen(devname) + 1;
+ } else {
+ *devname = '\0';
+ length = 1;
+ }
+
+ valptr = (void *) devname;
+ break;
+
+ default:
+ release_sock(sk);
+ return -ENOPROTOOPT;
+ }
+ release_sock(sk);
+
+ if (put_user(length, optlen))
+ return -EFAULT;
+
+ return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
+}
+
+static int ax25_listen(struct socket *sock, int backlog)
+{
+ struct sock *sk = sock->sk;
+ int res = 0;
+
+ lock_sock(sk);
+ if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
+ sk->sk_max_ack_backlog = backlog;
+ sk->sk_state = TCP_LISTEN;
+ goto out;
+ }
+ res = -EOPNOTSUPP;
+
+out:
+ release_sock(sk);
+
+ return res;
+}
+
+/*
+ * XXX: when creating ax25_sock we should update the .obj_size setting
+ * below.
+ */
+static struct proto ax25_proto = {
+ .name = "AX25",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct sock),
+};
+
+static int ax25_create(struct socket *sock, int protocol)
+{
+ struct sock *sk;
+ ax25_cb *ax25;
+
+ switch (sock->type) {
+ case SOCK_DGRAM:
+ if (protocol == 0 || protocol == PF_AX25)
+ protocol = AX25_P_TEXT;
+ break;
+
+ case SOCK_SEQPACKET:
+ switch (protocol) {
+ case 0:
+ case PF_AX25: /* For CLX */
+ protocol = AX25_P_TEXT;
+ break;
+ case AX25_P_SEGMENT:
+#ifdef CONFIG_INET
+ case AX25_P_ARP:
+ case AX25_P_IP:
+#endif
+#ifdef CONFIG_NETROM
+ case AX25_P_NETROM:
+#endif
+#ifdef CONFIG_ROSE
+ case AX25_P_ROSE:
+#endif
+ return -ESOCKTNOSUPPORT;
+#ifdef CONFIG_NETROM_MODULE
+ case AX25_P_NETROM:
+ if (ax25_protocol_is_registered(AX25_P_NETROM))
+ return -ESOCKTNOSUPPORT;
+#endif
+#ifdef CONFIG_ROSE_MODULE
+ case AX25_P_ROSE:
+ if (ax25_protocol_is_registered(AX25_P_ROSE))
+ return -ESOCKTNOSUPPORT;
+#endif
+ default:
+ break;
+ }
+ break;
+
+ case SOCK_RAW:
+ break;
+ default:
+ return -ESOCKTNOSUPPORT;
+ }
+
+ if ((sk = sk_alloc(PF_AX25, GFP_ATOMIC, &ax25_proto, 1)) == NULL)
+ return -ENOMEM;
+
+ ax25 = sk->sk_protinfo = ax25_create_cb();
+ if (!ax25) {
+ sk_free(sk);
+ return -ENOMEM;
+ }
+
+ sock_init_data(sock, sk);
+
+ sk->sk_destruct = ax25_free_sock;
+ sock->ops = &ax25_proto_ops;
+ sk->sk_protocol = protocol;
+
+ ax25->sk = sk;
+
+ return 0;
+}
+
+struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
+{
+ struct sock *sk;
+ ax25_cb *ax25, *oax25;
+
+ if ((sk = sk_alloc(PF_AX25, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
+ return NULL;
+
+ if ((ax25 = ax25_create_cb()) == NULL) {
+ sk_free(sk);
+ return NULL;
+ }
+
+ switch (osk->sk_type) {
+ case SOCK_DGRAM:
+ break;
+ case SOCK_SEQPACKET:
+ break;
+ default:
+ sk_free(sk);
+ ax25_cb_put(ax25);
+ return NULL;
+ }
+
+ sock_init_data(NULL, sk);
+
+ sk->sk_destruct = ax25_free_sock;
+ sk->sk_type = osk->sk_type;
+ sk->sk_socket = osk->sk_socket;
+ 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;
+ sk->sk_sleep = osk->sk_sleep;
+
+ if (sock_flag(osk, SOCK_DBG))
+ sock_set_flag(sk, SOCK_DBG);
+
+ if (sock_flag(osk, SOCK_ZAPPED))
+ sock_set_flag(sk, SOCK_ZAPPED);
+
+ oax25 = ax25_sk(osk);
+
+ ax25->modulus = oax25->modulus;
+ ax25->backoff = oax25->backoff;
+ ax25->pidincl = oax25->pidincl;
+ ax25->iamdigi = oax25->iamdigi;
+ ax25->rtt = oax25->rtt;
+ ax25->t1 = oax25->t1;
+ ax25->t2 = oax25->t2;
+ ax25->t3 = oax25->t3;
+ ax25->n2 = oax25->n2;
+ ax25->idle = oax25->idle;
+ ax25->paclen = oax25->paclen;
+ ax25->window = oax25->window;
+
+ ax25->ax25_dev = ax25_dev;
+ ax25->source_addr = oax25->source_addr;
+
+ if (oax25->digipeat != NULL) {
+ if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
+ sk_free(sk);
+ ax25_cb_put(ax25);
+ return NULL;
+ }
+
+ memcpy(ax25->digipeat, oax25->digipeat, sizeof(ax25_digi));
+ }
+
+ sk->sk_protinfo = ax25;
+ ax25->sk = sk;
+
+ return sk;
+}
+
+static int ax25_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ ax25_cb *ax25;
+
+ if (sk == NULL)
+ return 0;
+
+ sock_hold(sk);
+ sock_orphan(sk);
+ lock_sock(sk);
+ ax25 = ax25_sk(sk);
+
+ if (sk->sk_type == SOCK_SEQPACKET) {
+ switch (ax25->state) {
+ case AX25_STATE_0:
+ release_sock(sk);
+ ax25_disconnect(ax25, 0);
+ lock_sock(sk);
+ ax25_destroy_socket(ax25);
+ break;
+
+ case AX25_STATE_1:
+ case AX25_STATE_2:
+ ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
+ release_sock(sk);
+ ax25_disconnect(ax25, 0);
+ lock_sock(sk);
+ ax25_destroy_socket(ax25);
+ break;
+
+ case AX25_STATE_3:
+ case AX25_STATE_4:
+ ax25_clear_queues(ax25);
+ ax25->n2count = 0;
+
+ switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
+ case AX25_PROTO_STD_SIMPLEX:
+ case AX25_PROTO_STD_DUPLEX:
+ ax25_send_control(ax25,
+ AX25_DISC,
+ AX25_POLLON,
+ AX25_COMMAND);
+ ax25_stop_t2timer(ax25);
+ ax25_stop_t3timer(ax25);
+ ax25_stop_idletimer(ax25);
+ break;
+#ifdef CONFIG_AX25_DAMA_SLAVE
+ case AX25_PROTO_DAMA_SLAVE:
+ ax25_stop_t3timer(ax25);
+ ax25_stop_idletimer(ax25);
+ break;
+#endif
+ }
+ ax25_calculate_t1(ax25);
+ ax25_start_t1timer(ax25);
+ ax25->state = AX25_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;
+ }
+ } else {
+ sk->sk_state = TCP_CLOSE;
+ sk->sk_shutdown |= SEND_SHUTDOWN;
+ sk->sk_state_change(sk);
+ ax25_destroy_socket(ax25);
+ }
+
+ sock->sk = NULL;
+ release_sock(sk);
+ sock_put(sk);
+
+ return 0;
+}
+
+/*
+ * We support a funny extension here so you can (as root) give any callsign
+ * digipeated via a local address as source. This hack is obsolete now
+ * that we've implemented support for SO_BINDTODEVICE. It is however small
+ * and trivially backward compatible.
+ */
+static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+{
+ struct sock *sk = sock->sk;
+ struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
+ ax25_dev *ax25_dev = NULL;
+ ax25_address *call;
+ ax25_cb *ax25;
+ int err = 0;
+
+ if (addr_len != sizeof(struct sockaddr_ax25) &&
+ addr_len != sizeof(struct full_sockaddr_ax25)) {
+ /* support for old structure may go away some time */
+ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
+ (addr_len > sizeof(struct full_sockaddr_ax25))) {
+ return -EINVAL;
+ }
+
+ printk(KERN_WARNING "ax25_bind(): %s uses old (6 digipeater) socket structure.\n",
+ current->comm);
+ }
+
+ if (addr->fsa_ax25.sax25_family != AF_AX25)
+ return -EINVAL;
+
+ call = ax25_findbyuid(current->euid);
+ if (call == NULL && ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
+ return -EACCES;
+ }
+
+ lock_sock(sk);
+
+ ax25 = ax25_sk(sk);
+ if (!sock_flag(sk, SOCK_ZAPPED)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (call == NULL)
+ ax25->source_addr = addr->fsa_ax25.sax25_call;
+ else
+ ax25->source_addr = *call;
+
+ /*
+ * User already set interface with SO_BINDTODEVICE
+ */
+ if (ax25->ax25_dev != NULL)
+ goto done;
+
+ if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
+ if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
+ (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
+ err = -EADDRNOTAVAIL;
+ goto out;
+ }
+ } else {
+ if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
+ err = -EADDRNOTAVAIL;
+ goto out;
+ }
+ }
+
+ if (ax25_dev != NULL)
+ ax25_fillin_cb(ax25, ax25_dev);
+
+done:
+ ax25_cb_add(ax25);
+ sock_reset_flag(sk, SOCK_ZAPPED);
+
+out:
+ release_sock(sk);
+
+ return 0;
+}
+
+/*
+ * FIXME: nonblock behaviour looks like it may have a bug.
+ */
+static int ax25_connect(struct socket *sock, struct sockaddr *uaddr,
+ int addr_len, int flags)
+{
+ struct sock *sk = sock->sk;
+ ax25_cb *ax25 = ax25_sk(sk), *ax25t;
+ struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
+ ax25_digi *digi = NULL;
+ int ct = 0, err = 0;
+
+ /*
+ * some sanity checks. code further down depends on this
+ */
+
+ if (addr_len == sizeof(struct sockaddr_ax25)) {
+ /* support for this will go away in early 2.5.x */
+ printk(KERN_WARNING "ax25_connect(): %s uses obsolete socket structure\n",
+ current->comm);
+ }
+ else if (addr_len != sizeof(struct full_sockaddr_ax25)) {
+ /* support for old structure may go away some time */
+ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
+ (addr_len > sizeof(struct full_sockaddr_ax25))) {
+ return -EINVAL;
+ }
+
+ printk(KERN_WARNING "ax25_connect(): %s uses old (6 digipeater) socket structure.\n",
+ current->comm);
+ }
+
+ if (fsa->fsa_ax25.sax25_family != AF_AX25)
+ return -EINVAL;
+
+ lock_sock(sk);
+
+ /* deal with restarts */
+ if (sock->state == SS_CONNECTING) {
+ switch (sk->sk_state) {
+ case TCP_SYN_SENT: /* still trying */
+ err = -EINPROGRESS;
+ goto out;
+
+ case TCP_ESTABLISHED: /* connection established */
+ sock->state = SS_CONNECTED;
+ goto out;
+
+ case TCP_CLOSE: /* connection refused */
+ sock->state = SS_UNCONNECTED;
+ err = -ECONNREFUSED;
+ goto out;
+ }
+ }
+
+ if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
+ err = -EISCONN; /* No reconnect on a seqpacket socket */
+ goto out;
+ }
+
+ sk->sk_state = TCP_CLOSE;
+ sock->state = SS_UNCONNECTED;
+
+ if (ax25->digipeat != NULL) {
+ kfree(ax25->digipeat);
+ ax25->digipeat = NULL;
+ }
+
+ /*
+ * Handle digi-peaters to be used.
+ */
+ if (addr_len > sizeof(struct sockaddr_ax25) &&
+ fsa->fsa_ax25.sax25_ndigis != 0) {
+ /* Valid number of digipeaters ? */
+ if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
+ err = -ENOBUFS;
+ goto out;
+ }
+
+ digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
+ digi->lastrepeat = -1;
+
+ while (ct < fsa->fsa_ax25.sax25_ndigis) {
+ if ((fsa->fsa_digipeater[ct].ax25_call[6] &
+ AX25_HBIT) && ax25->iamdigi) {
+ digi->repeated[ct] = 1;
+ digi->lastrepeat = ct;
+ } else {
+ digi->repeated[ct] = 0;
+ }
+ digi->calls[ct] = fsa->fsa_digipeater[ct];
+ ct++;
+ }
+ }
+
+ /*
+ * Must bind first - autobinding in this may or may not work. If
+ * the socket is already bound, check to see if the device has
+ * been filled in, error if it hasn't.
+ */
+ if (sock_flag(sk, SOCK_ZAPPED)) {
+ /* check if we can remove this feature. It is broken. */
+ printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
+ current->comm);
+ if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
+ kfree(digi);
+ goto out;
+ }
+
+ ax25_fillin_cb(ax25, ax25->ax25_dev);
+ ax25_cb_add(ax25);
+ } else {
+ if (ax25->ax25_dev == NULL) {
+ kfree(digi);
+ err = -EHOSTUNREACH;
+ goto out;
+ }
+ }
+
+ if (sk->sk_type == SOCK_SEQPACKET &&
+ (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
+ ax25->ax25_dev->dev))) {
+ kfree(digi);
+ err = -EADDRINUSE; /* Already such a connection */
+ ax25_cb_put(ax25t);
+ goto out;
+ }
+
+ ax25->dest_addr = fsa->fsa_ax25.sax25_call;
+ ax25->digipeat = digi;
+
+ /* First the easy one */
+ if (sk->sk_type != SOCK_SEQPACKET) {
+ sock->state = SS_CONNECTED;
+ sk->sk_state = TCP_ESTABLISHED;
+ goto out;
+ }
+
+ /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
+ sock->state = SS_CONNECTING;
+ sk->sk_state = TCP_SYN_SENT;
+
+ switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
+ case AX25_PROTO_STD_SIMPLEX:
+ case AX25_PROTO_STD_DUPLEX:
+ ax25_std_establish_data_link(ax25);
+ break;
+
+#ifdef CONFIG_AX25_DAMA_SLAVE
+ case AX25_PROTO_DAMA_SLAVE:
+ ax25->modulus = AX25_MODULUS;
+ ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
+ if (ax25->ax25_dev->dama.slave)
+ ax25_ds_establish_data_link(ax25);
+ else
+ ax25_std_establish_data_link(ax25);
+ break;
+#endif
+ }
+
+ ax25->state = AX25_STATE_1;
+
+ ax25_start_heartbeat(ax25);
+
+ /* Now the loop */
+ if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
+ err = -EINPROGRESS;
+ goto out;
+ }
+
+ if (sk->sk_state == TCP_SYN_SENT) {
+ struct task_struct *tsk = current;
+ DECLARE_WAITQUEUE(wait, tsk);
+
+ add_wait_queue(sk->sk_sleep, &wait);
+ for (;;) {
+ if (sk->sk_state != TCP_SYN_SENT)
+ break;
+ set_current_state(TASK_INTERRUPTIBLE);
+ release_sock(sk);
+ if (!signal_pending(tsk)) {
+ schedule();
+ lock_sock(sk);
+ continue;
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(sk->sk_sleep, &wait);
+ return -ERESTARTSYS;
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(sk->sk_sleep, &wait);
+ }
+
+ if (sk->sk_state != TCP_ESTABLISHED) {
+ /* Not in ABM, not in WAIT_UA -> failed */
+ sock->state = SS_UNCONNECTED;
+ err = sock_error(sk); /* Always set at this point */
+ goto out;
+ }
+
+ sock->state = SS_CONNECTED;
+
+ err=0;
+out:
+ release_sock(sk);
+
+ return err;
+}
+
+
+static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
+{
+ struct task_struct *tsk = current;
+ DECLARE_WAITQUEUE(wait, tsk);
+ struct sk_buff *skb;
+ struct sock *newsk;
+ struct sock *sk;
+ int err = 0;
+
+ if (sock->state != SS_UNCONNECTED)
+ return -EINVAL;
+
+ if ((sk = sock->sk) == NULL)
+ return -EINVAL;
+
+ lock_sock(sk);
+ if (sk->sk_type != SOCK_SEQPACKET) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (sk->sk_state != TCP_LISTEN) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * The read queue this time is holding sockets ready to use
+ * hooked into the SABM we saved
+ */
+ add_wait_queue(sk->sk_sleep, &wait);
+ for (;;) {
+ skb = skb_dequeue(&sk->sk_receive_queue);
+ if (skb)
+ break;
+
+ release_sock(sk);
+ current->state = TASK_INTERRUPTIBLE;
+ if (flags & O_NONBLOCK) {
+ current->state = TASK_RUNNING;
+ remove_wait_queue(sk->sk_sleep, &wait);
+ return -EWOULDBLOCK;
+ }
+ if (!signal_pending(tsk)) {
+ schedule();
+ lock_sock(sk);
+ continue;
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(sk->sk_sleep, &wait);
+ return -ERESTARTSYS;
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(sk->sk_sleep, &wait);
+
+ newsk = skb->sk;
+ newsk->sk_socket = newsock;
+ newsk->sk_sleep = &newsock->wait;
+
+ /* Now attach up the new socket */
+ kfree_skb(skb);
+ sk->sk_ack_backlog--;
+ newsock->sk = newsk;
+ newsock->state = SS_CONNECTED;
+
+out:
+ release_sock(sk);
+
+ return err;
+}
+
+static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer)
+{
+ struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
+ struct sock *sk = sock->sk;
+ unsigned char ndigi, i;
+ ax25_cb *ax25;
+ int err = 0;
+
+ lock_sock(sk);
+ ax25 = ax25_sk(sk);
+
+ if (peer != 0) {
+ if (sk->sk_state != TCP_ESTABLISHED) {
+ err = -ENOTCONN;
+ goto out;
+ }
+
+ fsa->fsa_ax25.sax25_family = AF_AX25;
+ fsa->fsa_ax25.sax25_call = ax25->dest_addr;
+ fsa->fsa_ax25.sax25_ndigis = 0;
+
+ if (ax25->digipeat != NULL) {
+ ndigi = ax25->digipeat->ndigi;
+ fsa->fsa_ax25.sax25_ndigis = ndigi;
+ for (i = 0; i < ndigi; i++)
+ fsa->fsa_digipeater[i] =
+ ax25->digipeat->calls[i];
+ }
+ } else {
+ fsa->fsa_ax25.sax25_family = AF_AX25;
+ fsa->fsa_ax25.sax25_call = ax25->source_addr;
+ fsa->fsa_ax25.sax25_ndigis = 1;
+ if (ax25->ax25_dev != NULL) {
+ memcpy(&fsa->fsa_digipeater[0],
+ ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
+ } else {
+ fsa->fsa_digipeater[0] = null_ax25_address;
+ }
+ }
+ *uaddr_len = sizeof (struct full_sockaddr_ax25);
+
+out:
+ release_sock(sk);
+
+ return err;
+}
+
+static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t len)
+{
+ struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
+ struct sock *sk = sock->sk;
+ struct sockaddr_ax25 sax;
+ struct sk_buff *skb;
+ ax25_digi dtmp, *dp;
+ unsigned char *asmptr;
+ ax25_cb *ax25;
+ size_t size;
+ int lv, err, addr_len = msg->msg_namelen;
+
+ if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
+ return -EINVAL;
+
+ lock_sock(sk);
+ ax25 = ax25_sk(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 (ax25->ax25_dev == NULL) {
+ err = -ENETUNREACH;
+ goto out;
+ }
+
+ if (len > ax25->ax25_dev->dev->mtu) {
+ err = -EMSGSIZE;
+ goto out;
+ }
+
+ if (usax != NULL) {
+ if (usax->sax25_family != AF_AX25) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (addr_len == sizeof(struct sockaddr_ax25)) {
+ printk(KERN_WARNING "ax25_sendmsg(): %s uses obsolete socket structure\n",
+ current->comm);
+ }
+ else if (addr_len != sizeof(struct full_sockaddr_ax25)) {
+ /* support for old structure may go away some time */
+ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
+ (addr_len > sizeof(struct full_sockaddr_ax25))) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ printk(KERN_WARNING "ax25_sendmsg(): %s uses old (6 digipeater) socket structure.\n",
+ current->comm);
+ }
+
+ if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
+ int ct = 0;
+ struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
+
+ /* Valid number of digipeaters ? */
+ if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ dtmp.ndigi = usax->sax25_ndigis;
+
+ while (ct < usax->sax25_ndigis) {
+ dtmp.repeated[ct] = 0;
+ dtmp.calls[ct] = fsa->fsa_digipeater[ct];
+ ct++;
+ }
+
+ dtmp.lastrepeat = 0;
+ }
+
+ sax = *usax;
+ if (sk->sk_type == SOCK_SEQPACKET &&
+ ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
+ err = -EISCONN;
+ goto out;
+ }
+ if (usax->sax25_ndigis == 0)
+ dp = NULL;
+ else
+ dp = &dtmp;
+ } else {
+ /*
+ * FIXME: 1003.1g - if the socket is like this because
+ * it has become closed (not started closed) and is VC
+ * we ought to SIGPIPE, EPIPE
+ */
+ if (sk->sk_state != TCP_ESTABLISHED) {
+ err = -ENOTCONN;
+ goto out;
+ }
+ sax.sax25_family = AF_AX25;
+ sax.sax25_call = ax25->dest_addr;
+ dp = ax25->digipeat;
+ }
+
+ SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n");
+
+ /* Build a packet */
+ SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n");
+
+ /* Assume the worst case */
+ size = len + ax25->ax25_dev->dev->hard_header_len;
+
+ skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
+ if (skb == NULL)
+ goto out;
+
+ skb_reserve(skb, size - len);
+
+ SOCK_DEBUG(sk, "AX.25: Appending user data\n");
+
+ /* User data follows immediately after the AX.25 data */
+ if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
+ err = -EFAULT;
+ kfree_skb(skb);
+ goto out;
+ }
+
+ skb->nh.raw = skb->data;
+
+ /* Add the PID if one is not supplied by the user in the skb */
+ if (!ax25->pidincl) {
+ asmptr = skb_push(skb, 1);
+ *asmptr = sk->sk_protocol;
+ }
+
+ SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n");
+
+ if (sk->sk_type == SOCK_SEQPACKET) {
+ /* Connected mode sockets go via the LAPB machine */
+ if (sk->sk_state != TCP_ESTABLISHED) {
+ kfree_skb(skb);
+ err = -ENOTCONN;
+ goto out;
+ }
+
+ /* Shove it onto the queue and kick */
+ ax25_output(ax25, ax25->paclen, skb);
+
+ err = len;
+ goto out;
+ }
+
+ asmptr = skb_push(skb, 1 + ax25_addr_size(dp));
+
+ SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp);
+
+ if (dp != NULL)
+ SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi);
+
+ /* Build an AX.25 header */
+ asmptr += (lv = ax25_addr_build(asmptr, &ax25->source_addr,
+ &sax.sax25_call, dp,
+ AX25_COMMAND, AX25_MODULUS));
+
+ SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv);
+
+ skb->h.raw = asmptr;
+
+ SOCK_DEBUG(sk, "base=%p pos=%p\n", skb->data, asmptr);
+
+ *asmptr = AX25_UI;
+
+ /* Datagram frames go straight out of the door as UI */
+ skb->dev = ax25->ax25_dev->dev;
+
+ ax25_queue_xmit(skb);
+
+ err = len;
+
+out:
+ release_sock(sk);
+
+ return err;
+}
+
+static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t size, int flags)
+{
+ struct sock *sk = sock->sk;
+ struct sk_buff *skb;
+ int copied;
+ int err = 0;
+
+ lock_sock(sk);
+ /*
+ * This works for seqpacket too. The receiver has ordered the
+ * queue for us! We do one quick check first though
+ */
+ if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
+ err = -ENOTCONN;
+ goto out;
+ }
+
+ /* Now we can treat all alike */
+ skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
+ flags & MSG_DONTWAIT, &err);
+ if (skb == NULL)
+ goto out;
+
+ if (!ax25_sk(sk)->pidincl)
+ skb_pull(skb, 1); /* Remove PID */
+
+ skb->h.raw = skb->data;
+ copied = skb->len;
+
+ if (copied > size) {
+ copied = size;
+ msg->msg_flags |= MSG_TRUNC;
+ }
+
+ skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+
+ if (msg->msg_namelen != 0) {
+ struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
+ ax25_digi digi;
+ ax25_address src;
+
+ ax25_addr_parse(skb->mac.raw+1, skb->data-skb->mac.raw-1, &src, NULL, &digi, NULL, NULL);
+
+ sax->sax25_family = AF_AX25;
+ /* We set this correctly, even though we may not let the
+ application know the digi calls further down (because it
+ did NOT ask to know them). This could get political... **/
+ sax->sax25_ndigis = digi.ndigi;
+ sax->sax25_call = src;
+
+ if (sax->sax25_ndigis != 0) {
+ int ct;
+ struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
+
+ for (ct = 0; ct < digi.ndigi; ct++)
+ fsa->fsa_digipeater[ct] = digi.calls[ct];
+ }
+ msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
+ }
+
+ skb_free_datagram(sk, skb);
+ err = copied;
+
+out:
+ release_sock(sk);
+
+ return err;
+}
+
+static int ax25_shutdown(struct socket *sk, int how)
+{
+ /* FIXME - generate DM and RNR states */
+ return -EOPNOTSUPP;
+}
+
+static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct sock *sk = sock->sk;
+ void __user *argp = (void __user *)arg;
+ int res = 0;
+
+ lock_sock(sk);
+ switch (cmd) {
+ case TIOCOUTQ: {
+ long amount;
+ amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
+ if (amount < 0)
+ amount = 0;
+ res = put_user(amount, (int __user *)argp);
+ break;
+ }
+
+ case TIOCINQ: {
+ struct sk_buff *skb;
+ long amount = 0L;
+ /* 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;
+ res = put_user(amount, (int __user *)argp);
+ break;
+ }
+
+ case SIOCGSTAMP:
+ if (sk != NULL) {
+ res = sock_get_timestamp(sk, argp);
+ break;
+ }
+ res = -EINVAL;
+ break;
+
+ case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
+ case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
+ case SIOCAX25GETUID: {
+ struct sockaddr_ax25 sax25;
+ if (copy_from_user(&sax25, argp, sizeof(sax25))) {
+ res = -EFAULT;
+ break;
+ }
+ res = ax25_uid_ioctl(cmd, &sax25);
+ break;
+ }
+
+ case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
+ long amount;
+ if (!capable(CAP_NET_ADMIN)) {
+ res = -EPERM;
+ break;
+ }
+ if (get_user(amount, (long __user *)argp)) {
+ res = -EFAULT;
+ break;
+ }
+ if (amount > AX25_NOUID_BLOCK) {
+ res = -EINVAL;
+ break;
+ }
+ ax25_uid_policy = amount;
+ res = 0;
+ break;
+ }
+
+ case SIOCADDRT:
+ case SIOCDELRT:
+ case SIOCAX25OPTRT:
+ if (!capable(CAP_NET_ADMIN)) {
+ res = -EPERM;
+ break;
+ }
+ res = ax25_rt_ioctl(cmd, argp);
+ break;
+
+ case SIOCAX25CTLCON:
+ if (!capable(CAP_NET_ADMIN)) {
+ res = -EPERM;
+ break;
+ }
+ res = ax25_ctl_ioctl(cmd, argp);
+ break;
+
+ case SIOCAX25GETINFO:
+ case SIOCAX25GETINFOOLD: {
+ ax25_cb *ax25 = ax25_sk(sk);
+ struct ax25_info_struct ax25_info;
+
+ ax25_info.t1 = ax25->t1 / HZ;
+ ax25_info.t2 = ax25->t2 / HZ;
+ ax25_info.t3 = ax25->t3 / HZ;
+ ax25_info.idle = ax25->idle / (60 * HZ);
+ ax25_info.n2 = ax25->n2;
+ ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
+ ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
+ ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
+ ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
+ ax25_info.n2count = ax25->n2count;
+ ax25_info.state = ax25->state;
+ ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc);
+ ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc);
+ ax25_info.vs = ax25->vs;
+ ax25_info.vr = ax25->vr;
+ ax25_info.va = ax25->va;
+ ax25_info.vs_max = ax25->vs; /* reserved */
+ ax25_info.paclen = ax25->paclen;
+ ax25_info.window = ax25->window;
+
+ /* old structure? */
+ if (cmd == SIOCAX25GETINFOOLD) {
+ static int warned = 0;
+ if (!warned) {
+ printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
+ current->comm);
+ warned=1;
+ }
+
+ if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
+ res = -EFAULT;
+ break;
+ }
+ } else {
+ if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
+ res = -EINVAL;
+ break;
+ }
+ }
+ res = 0;
+ break;
+ }
+
+ case SIOCAX25ADDFWD:
+ case SIOCAX25DELFWD: {
+ struct ax25_fwd_struct ax25_fwd;
+ if (!capable(CAP_NET_ADMIN)) {
+ res = -EPERM;
+ break;
+ }
+ if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
+ res = -EFAULT;
+ break;
+ }
+ res = ax25_fwd_ioctl(cmd, &ax25_fwd);
+ break;
+ }
+
+ case SIOCGIFADDR:
+ case SIOCSIFADDR:
+ case SIOCGIFDSTADDR:
+ case SIOCSIFDSTADDR:
+ case SIOCGIFBRDADDR:
+ case SIOCSIFBRDADDR:
+ case SIOCGIFNETMASK:
+ case SIOCSIFNETMASK:
+ case SIOCGIFMETRIC:
+ case SIOCSIFMETRIC:
+ res = -EINVAL;
+ break;
+
+ default:
+ res = dev_ioctl(cmd, argp);
+ break;
+ }
+ release_sock(sk);
+
+ return res;
+}
+
+#ifdef CONFIG_PROC_FS
+
+static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
+{
+ struct ax25_cb *ax25;
+ struct hlist_node *node;
+ int i = 0;
+
+ spin_lock_bh(&ax25_list_lock);
+ ax25_for_each(ax25, node, &ax25_list) {
+ if (i == *pos)
+ return ax25;
+ ++i;
+ }
+ return NULL;
+}
+
+static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+
+ return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next,
+ struct ax25_cb, ax25_node);
+}
+
+static void ax25_info_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock_bh(&ax25_list_lock);
+}
+
+static int ax25_info_show(struct seq_file *seq, void *v)
+{
+ ax25_cb *ax25 = v;
+ int k;
+
+
+ /*
+ * New format:
+ * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode
+ */
+
+ seq_printf(seq, "%8.8lx %s %s%s ",
+ (long) ax25,
+ ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
+ ax2asc(&ax25->source_addr),
+ ax25->iamdigi? "*":"");
+ seq_printf(seq, "%s", ax2asc(&ax25->dest_addr));
+
+ for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
+ seq_printf(seq, ",%s%s",
+ ax2asc(&ax25->digipeat->calls[k]),
+ ax25->digipeat->repeated[k]? "*":"");
+ }
+
+ seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
+ ax25->state,
+ ax25->vs, ax25->vr, ax25->va,
+ ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
+ ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
+ ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
+ ax25_display_timer(&ax25->idletimer) / (60 * HZ),
+ ax25->idle / (60 * HZ),
+ ax25->n2count, ax25->n2,
+ ax25->rtt / HZ,
+ ax25->window,
+ ax25->paclen);
+
+ if (ax25->sk != NULL) {
+ bh_lock_sock(ax25->sk);
+ seq_printf(seq," %d %d %ld\n",
+ atomic_read(&ax25->sk->sk_wmem_alloc),
+ atomic_read(&ax25->sk->sk_rmem_alloc),
+ ax25->sk->sk_socket != NULL ? SOCK_INODE(ax25->sk->sk_socket)->i_ino : 0L);
+ bh_unlock_sock(ax25->sk);
+ } else {
+ seq_puts(seq, " * * *\n");
+ }
+ return 0;
+}
+
+static struct seq_operations ax25_info_seqops = {
+ .start = ax25_info_start,
+ .next = ax25_info_next,
+ .stop = ax25_info_stop,
+ .show = ax25_info_show,
+};
+
+static int ax25_info_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &ax25_info_seqops);
+}
+
+static struct file_operations ax25_info_fops = {
+ .owner = THIS_MODULE,
+ .open = ax25_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#endif
+
+static struct net_proto_family ax25_family_ops = {
+ .family = PF_AX25,
+ .create = ax25_create,
+ .owner = THIS_MODULE,
+};
+
+static struct proto_ops ax25_proto_ops = {
+ .family = PF_AX25,
+ .owner = THIS_MODULE,
+ .release = ax25_release,
+ .bind = ax25_bind,
+ .connect = ax25_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = ax25_accept,
+ .getname = ax25_getname,
+ .poll = datagram_poll,
+ .ioctl = ax25_ioctl,
+ .listen = ax25_listen,
+ .shutdown = ax25_shutdown,
+ .setsockopt = ax25_setsockopt,
+ .getsockopt = ax25_getsockopt,
+ .sendmsg = ax25_sendmsg,
+ .recvmsg = ax25_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
+/*
+ * Called by socket.c on kernel start up
+ */
+static struct packet_type ax25_packet_type = {
+ .type = __constant_htons(ETH_P_AX25),
+ .dev = NULL, /* All devices */
+ .func = ax25_kiss_rcv,
+};
+
+static struct notifier_block ax25_dev_notifier = {
+ .notifier_call =ax25_device_event,
+};
+
+EXPORT_SYMBOL(ax25_encapsulate);
+EXPORT_SYMBOL(ax25_rebuild_header);
+EXPORT_SYMBOL(ax25_findbyuid);
+EXPORT_SYMBOL(ax25_find_cb);
+EXPORT_SYMBOL(ax25_linkfail_register);
+EXPORT_SYMBOL(ax25_linkfail_release);
+EXPORT_SYMBOL(ax25_listen_register);
+EXPORT_SYMBOL(ax25_listen_release);
+EXPORT_SYMBOL(ax25_protocol_register);
+EXPORT_SYMBOL(ax25_protocol_release);
+EXPORT_SYMBOL(ax25_send_frame);
+EXPORT_SYMBOL(ax25_uid_policy);
+EXPORT_SYMBOL(ax25cmp);
+EXPORT_SYMBOL(ax2asc);
+EXPORT_SYMBOL(asc2ax);
+EXPORT_SYMBOL(null_ax25_address);
+EXPORT_SYMBOL(ax25_display_timer);
+
+static int __init ax25_init(void)
+{
+ int rc = proto_register(&ax25_proto, 0);
+
+ if (rc != 0)
+ goto out;
+
+ sock_register(&ax25_family_ops);
+ dev_add_pack(&ax25_packet_type);
+ register_netdevice_notifier(&ax25_dev_notifier);
+ ax25_register_sysctl();
+
+ proc_net_fops_create("ax25_route", S_IRUGO, &ax25_route_fops);
+ proc_net_fops_create("ax25", S_IRUGO, &ax25_info_fops);
+ proc_net_fops_create("ax25_calls", S_IRUGO, &ax25_uid_fops);
+out:
+ return rc;
+}
+module_init(ax25_init);
+
+
+MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
+MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_AX25);
+
+static void __exit ax25_exit(void)
+{
+ proc_net_remove("ax25_route");
+ proc_net_remove("ax25");
+ proc_net_remove("ax25_calls");
+ ax25_rt_free();
+ ax25_uid_free();
+ ax25_dev_free();
+
+ ax25_unregister_sysctl();
+ unregister_netdevice_notifier(&ax25_dev_notifier);
+
+ dev_remove_pack(&ax25_packet_type);
+
+ sock_unregister(PF_AX25);
+ proto_unregister(&ax25_proto);
+}
+module_exit(ax25_exit);