Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 534 insertions, 0 deletions

diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
new file mode 100644
index 000000000000..44b99b1ff9f8
--- /dev/null
+++ b/net/ax25/ax25_route.c
@@ -0,0 +1,534 @@
+/*
+ * 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) 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) Frederic Rible F1OAT (frible@teaser.fr)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/timer.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.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 <linux/spinlock.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+
+static ax25_route *ax25_route_list;
+static DEFINE_RWLOCK(ax25_route_lock);
+
+static ax25_route *ax25_get_route(ax25_address *, struct net_device *);
+
+void ax25_rt_device_down(struct net_device *dev)
+{
+        ax25_route *s, *t, *ax25_rt;
+
+        write_lock(&ax25_route_lock);
+        ax25_rt = ax25_route_list;
+        while (ax25_rt != NULL) {
+                s       = ax25_rt;
+                ax25_rt = ax25_rt->next;
+
+                if (s->dev == dev) {
+                        if (ax25_route_list == s) {
+                                ax25_route_list = s->next;
+                                if (s->digipeat != NULL)
+                                        kfree(s->digipeat);
+                                kfree(s);
+                        } else {
+                                for (t = ax25_route_list; t != NULL; t = t->next) {
+                                        if (t->next == s) {
+                                                t->next = s->next;
+                                                if (s->digipeat != NULL)
+                                                        kfree(s->digipeat);
+                                                kfree(s);
+                                                break;
+                                        }
+                                }
+                        }
+                }
+        }
+        write_unlock(&ax25_route_lock);
+}
+
+static int ax25_rt_add(struct ax25_routes_struct *route)
+{
+        ax25_route *ax25_rt;
+        ax25_dev *ax25_dev;
+        int i;
+
+        if ((ax25_dev = ax25_addr_ax25dev(&route->port_addr)) == NULL)
+                return -EINVAL;
+        if (route->digi_count > AX25_MAX_DIGIS)
+                return -EINVAL;
+
+        write_lock(&ax25_route_lock);
+
+        ax25_rt = ax25_route_list;
+        while (ax25_rt != NULL) {
+                if (ax25cmp(&ax25_rt->callsign, &route->dest_addr) == 0 &&
+                            ax25_rt->dev == ax25_dev->dev) {
+                        if (ax25_rt->digipeat != NULL) {
+                                kfree(ax25_rt->digipeat);
+                                ax25_rt->digipeat = NULL;
+                        }
+                        if (route->digi_count != 0) {
+                                if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
+                                        write_unlock(&ax25_route_lock);
+                                        return -ENOMEM;
+                                }
+                                ax25_rt->digipeat->lastrepeat = -1;
+                                ax25_rt->digipeat->ndigi      = route->digi_count;
+                                for (i = 0; i < route->digi_count; i++) {
+                                        ax25_rt->digipeat->repeated[i] = 0;
+                                        ax25_rt->digipeat->calls[i]    = route->digi_addr[i];
+                                }
+                        }
+                        write_unlock(&ax25_route_lock);
+                        return 0;
+                }
+                ax25_rt = ax25_rt->next;
+        }
+
+        if ((ax25_rt = kmalloc(sizeof(ax25_route), GFP_ATOMIC)) == NULL) {
+                write_unlock(&ax25_route_lock);
+                return -ENOMEM;
+        }
+
+        atomic_set(&ax25_rt->ref, 0);
+        ax25_rt->callsign     = route->dest_addr;
+        ax25_rt->dev          = ax25_dev->dev;
+        ax25_rt->digipeat     = NULL;
+        ax25_rt->ip_mode      = ' ';
+        if (route->digi_count != 0) {
+                if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
+                        write_unlock(&ax25_route_lock);
+                        kfree(ax25_rt);
+                        return -ENOMEM;
+                }
+                ax25_rt->digipeat->lastrepeat = -1;
+                ax25_rt->digipeat->ndigi      = route->digi_count;
+                for (i = 0; i < route->digi_count; i++) {
+                        ax25_rt->digipeat->repeated[i] = 0;
+                        ax25_rt->digipeat->calls[i]    = route->digi_addr[i];
+                }
+        }
+        ax25_rt->next   = ax25_route_list;
+        ax25_route_list = ax25_rt;
+        write_unlock(&ax25_route_lock);
+
+        return 0;
+}
+
+static void ax25_rt_destroy(ax25_route *ax25_rt)
+{
+        if (atomic_read(&ax25_rt->ref) == 0) {
+                if (ax25_rt->digipeat != NULL)
+                        kfree(ax25_rt->digipeat);
+                kfree(ax25_rt);
+                return;
+        }
+
+        /*
+         * Uh...  Route is still in use; we can't yet destroy it.  Retry later.
+         */
+        init_timer(&ax25_rt->timer);
+        ax25_rt->timer.data     = (unsigned long) ax25_rt;
+        ax25_rt->timer.function = (void *) ax25_rt_destroy;
+        ax25_rt->timer.expires  = jiffies + 5 * HZ;
+
+        add_timer(&ax25_rt->timer);
+}
+
+static int ax25_rt_del(struct ax25_routes_struct *route)
+{
+        ax25_route *s, *t, *ax25_rt;
+        ax25_dev *ax25_dev;
+
+        if ((ax25_dev = ax25_addr_ax25dev(&route->port_addr)) == NULL)
+                return -EINVAL;
+
+        write_lock(&ax25_route_lock);
+
+        ax25_rt = ax25_route_list;
+        while (ax25_rt != NULL) {
+                s       = ax25_rt;
+                ax25_rt = ax25_rt->next;
+                if (s->dev == ax25_dev->dev &&
+                    ax25cmp(&route->dest_addr, &s->callsign) == 0) {
+                        if (ax25_route_list == s) {
+                                ax25_route_list = s->next;
+                                ax25_rt_destroy(s);
+                        } else {
+                                for (t = ax25_route_list; t != NULL; t = t->next) {
+                                        if (t->next == s) {
+                                                t->next = s->next;
+                                                ax25_rt_destroy(s);
+                                                break;
+                                        }
+                                }
+                        }
+                }
+        }
+        write_unlock(&ax25_route_lock);
+
+        return 0;
+}
+
+static int ax25_rt_opt(struct ax25_route_opt_struct *rt_option)
+{
+        ax25_route *ax25_rt;
+        ax25_dev *ax25_dev;
+        int err = 0;
+
+        if ((ax25_dev = ax25_addr_ax25dev(&rt_option->port_addr)) == NULL)
+                return -EINVAL;
+
+        write_lock(&ax25_route_lock);
+
+        ax25_rt = ax25_route_list;
+        while (ax25_rt != NULL) {
+                if (ax25_rt->dev == ax25_dev->dev &&
+                    ax25cmp(&rt_option->dest_addr, &ax25_rt->callsign) == 0) {
+                        switch (rt_option->cmd) {
+                        case AX25_SET_RT_IPMODE:
+                                switch (rt_option->arg) {
+                                case ' ':
+                                case 'D':
+                                case 'V':
+                                        ax25_rt->ip_mode = rt_option->arg;
+                                        break;
+                                default:
+                                        err = -EINVAL;
+                                        goto out;
+                                }
+                                break;
+                        default:
+                                err = -EINVAL;
+                                goto out;
+                        }
+                }
+                ax25_rt = ax25_rt->next;
+        }
+
+out:
+        write_unlock(&ax25_route_lock);
+        return err;
+}
+
+int ax25_rt_ioctl(unsigned int cmd, void __user *arg)
+{
+        struct ax25_route_opt_struct rt_option;
+        struct ax25_routes_struct route;
+
+        switch (cmd) {
+        case SIOCADDRT:
+                if (copy_from_user(&route, arg, sizeof(route)))
+                        return -EFAULT;
+                return ax25_rt_add(&route);
+
+        case SIOCDELRT:
+                if (copy_from_user(&route, arg, sizeof(route)))
+                        return -EFAULT;
+                return ax25_rt_del(&route);
+
+        case SIOCAX25OPTRT:
+                if (copy_from_user(&rt_option, arg, sizeof(rt_option)))
+                        return -EFAULT;
+                return ax25_rt_opt(&rt_option);
+
+        default:
+                return -EINVAL;
+        }
+}
+
+#ifdef CONFIG_PROC_FS
+
+static void *ax25_rt_seq_start(struct seq_file *seq, loff_t *pos)
+{
+        struct ax25_route *ax25_rt;
+        int i = 1;
+ 
+        read_lock(&ax25_route_lock);
+        if (*pos == 0)
+                return SEQ_START_TOKEN;
+
+        for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
+                if (i == *pos)
+                        return ax25_rt;
+                ++i;
+        }
+
+        return NULL;
+}
+
+static void *ax25_rt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+        ++*pos;
+        return (v == SEQ_START_TOKEN) ? ax25_route_list : 
+                ((struct ax25_route *) v)->next;
+}
+
+static void ax25_rt_seq_stop(struct seq_file *seq, void *v)
+{
+        read_unlock(&ax25_route_lock);
+}
+
+static int ax25_rt_seq_show(struct seq_file *seq, void *v)
+{
+        if (v == SEQ_START_TOKEN)
+                seq_puts(seq, "callsign  dev  mode digipeaters\n");
+        else {
+                struct ax25_route *ax25_rt = v;
+                const char *callsign;
+                int i;
+
+                if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0)
+                        callsign = "default";
+                else
+                        callsign = ax2asc(&ax25_rt->callsign);
+
+                seq_printf(seq, "%-9s %-4s",
+                        callsign,
+                        ax25_rt->dev ? ax25_rt->dev->name : "???");
+
+                switch (ax25_rt->ip_mode) {
+                case 'V':
+                        seq_puts(seq, "   vc");
+                        break;
+                case 'D':
+                        seq_puts(seq, "   dg");
+                        break;
+                default:
+                        seq_puts(seq, "    *");
+                        break;
+                }
+
+                if (ax25_rt->digipeat != NULL)
+                        for (i = 0; i < ax25_rt->digipeat->ndigi; i++)
+                                seq_printf(seq, " %s", ax2asc(&ax25_rt->digipeat->calls[i]));
+
+                seq_puts(seq, "\n");
+        }
+        return 0;
+}
+
+static struct seq_operations ax25_rt_seqops = {
+        .start = ax25_rt_seq_start,
+        .next = ax25_rt_seq_next,
+        .stop = ax25_rt_seq_stop,
+        .show = ax25_rt_seq_show,
+};
+
+static int ax25_rt_info_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &ax25_rt_seqops);
+}
+
+struct file_operations ax25_route_fops = {
+        .owner = THIS_MODULE,
+        .open = ax25_rt_info_open,
+        .read = seq_read,
+        .llseek = seq_lseek,
+        .release = seq_release,
+};
+
+#endif
+
+/*
+ *      Find AX.25 route
+ *
+ *      Only routes with a refernce rout of zero can be destroyed.
+ */
+static ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev)
+{
+        ax25_route *ax25_spe_rt = NULL;
+        ax25_route *ax25_def_rt = NULL;
+        ax25_route *ax25_rt;
+
+        read_lock(&ax25_route_lock);
+        /*
+         *      Bind to the physical interface we heard them on, or the default
+         *      route if none is found;
+         */
+        for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
+                if (dev == NULL) {
+                        if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev != NULL)
+                                ax25_spe_rt = ax25_rt;
+                        if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev != NULL)
+                                ax25_def_rt = ax25_rt;
+                } else {
+                        if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev == dev)
+                                ax25_spe_rt = ax25_rt;
+                        if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev == dev)
+                                ax25_def_rt = ax25_rt;
+                }
+        }
+
+        ax25_rt = ax25_def_rt;
+        if (ax25_spe_rt != NULL)
+                ax25_rt = ax25_spe_rt;
+
+        if (ax25_rt != NULL)
+                atomic_inc(&ax25_rt->ref);
+
+        read_unlock(&ax25_route_lock);
+
+        return ax25_rt;
+}
+
+/*
+ *      Adjust path: If you specify a default route and want to connect
+ *      a target on the digipeater path but w/o having a special route
+ *      set before, the path has to be truncated from your target on.
+ */
+static inline void ax25_adjust_path(ax25_address *addr, ax25_digi *digipeat)
+{
+        int k;
+
+        for (k = 0; k < digipeat->ndigi; k++) {
+                if (ax25cmp(addr, &digipeat->calls[k]) == 0)
+                        break;
+        }
+
+        digipeat->ndigi = k;
+}
+
+
+/*
+ *      Find which interface to use.
+ */
+int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
+{
+        ax25_route *ax25_rt;
+        ax25_address *call;
+        int err;
+
+        if ((ax25_rt = ax25_get_route(addr, NULL)) == NULL)
+                return -EHOSTUNREACH;
+
+        if ((ax25->ax25_dev = ax25_dev_ax25dev(ax25_rt->dev)) == NULL) {
+                err = -EHOSTUNREACH;
+                goto put;
+        }
+
+        if ((call = ax25_findbyuid(current->euid)) == NULL) {
+                if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
+                        err = -EPERM;
+                        goto put;
+                }
+                call = (ax25_address *)ax25->ax25_dev->dev->dev_addr;
+        }
+
+        ax25->source_addr = *call;
+
+        if (ax25_rt->digipeat != NULL) {
+                if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
+                        err = -ENOMEM;
+                        goto put;
+                }
+                memcpy(ax25->digipeat, ax25_rt->digipeat, sizeof(ax25_digi));
+                ax25_adjust_path(addr, ax25->digipeat);
+        }
+
+        if (ax25->sk != NULL) {
+                bh_lock_sock(ax25->sk);
+                sock_reset_flag(ax25->sk, SOCK_ZAPPED);
+                bh_unlock_sock(ax25->sk);
+        }
+
+put:
+        ax25_put_route(ax25_rt);
+
+        return 0;
+}
+
+ax25_route *ax25_rt_find_route(ax25_route * route, ax25_address *addr,
+        struct net_device *dev)
+{
+        ax25_route *ax25_rt;
+
+        if ((ax25_rt = ax25_get_route(addr, dev)))
+                return ax25_rt;
+
+        route->next     = NULL;
+        atomic_set(&route->ref, 1);
+        route->callsign = *addr;
+        route->dev      = dev;
+        route->digipeat = NULL;
+        route->ip_mode  = ' ';
+
+        return route;
+}
+
+struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src,
+        ax25_address *dest, ax25_digi *digi)
+{
+        struct sk_buff *skbn;
+        unsigned char *bp;
+        int len;
+
+        len = digi->ndigi * AX25_ADDR_LEN;
+
+        if (skb_headroom(skb) < len) {
+                if ((skbn = skb_realloc_headroom(skb, len)) == NULL) {
+                        printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n");
+                        return NULL;
+                }
+
+                if (skb->sk != NULL)
+                        skb_set_owner_w(skbn, skb->sk);
+
+                kfree_skb(skb);
+
+                skb = skbn;
+        }
+
+        bp = skb_push(skb, len);
+
+        ax25_addr_build(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS);
+
+        return skb;
+}
+
+/*
+ *      Free all memory associated with routing structures.
+ */
+void __exit ax25_rt_free(void)
+{
+        ax25_route *s, *ax25_rt = ax25_route_list;
+
+        write_lock(&ax25_route_lock);
+        while (ax25_rt != NULL) {
+                s       = ax25_rt;
+                ax25_rt = ax25_rt->next;
+
+                if (s->digipeat != NULL)
+                        kfree(s->digipeat);
+
+                kfree(s);
+        }
+        write_unlock(&ax25_route_lock);
+}