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/rose/rose_route.c b/net/rose/rose_route.c
new file mode 100644
index 0000000..ff73ebb
--- /dev/null
+++ b/net/rose/rose_route.c
@@ -0,0 +1,1343 @@
+/*
+ * 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) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
+ * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <net/arp.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <asm/system.h>
+#include <asm/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 <linux/netfilter.h>
+#include <linux/init.h>
+#include <net/rose.h>
+#include <linux/seq_file.h>
+
+static unsigned int rose_neigh_no = 1;
+
+static struct rose_node *rose_node_list;
+static DEFINE_SPINLOCK(rose_node_list_lock);
+static struct rose_neigh *rose_neigh_list;
+static DEFINE_SPINLOCK(rose_neigh_list_lock);
+static struct rose_route *rose_route_list;
+static DEFINE_SPINLOCK(rose_route_list_lock);
+
+struct rose_neigh *rose_loopback_neigh;
+
+static void rose_remove_neigh(struct rose_neigh *);
+
+/*
+ * Add a new route to a node, and in the process add the node and the
+ * neighbour if it is new.
+ */
+static int rose_add_node(struct rose_route_struct *rose_route,
+ struct net_device *dev)
+{
+ struct rose_node *rose_node, *rose_tmpn, *rose_tmpp;
+ struct rose_neigh *rose_neigh;
+ int i, res = 0;
+
+ spin_lock_bh(&rose_node_list_lock);
+ spin_lock_bh(&rose_neigh_list_lock);
+
+ rose_node = rose_node_list;
+ while (rose_node != NULL) {
+ if ((rose_node->mask == rose_route->mask) &&
+ (rosecmpm(&rose_route->address, &rose_node->address,
+ rose_route->mask) == 0))
+ break;
+ rose_node = rose_node->next;
+ }
+
+ if (rose_node != NULL && rose_node->loopback) {
+ res = -EINVAL;
+ goto out;
+ }
+
+ rose_neigh = rose_neigh_list;
+ while (rose_neigh != NULL) {
+ if (ax25cmp(&rose_route->neighbour, &rose_neigh->callsign) == 0
+ && rose_neigh->dev == dev)
+ break;
+ rose_neigh = rose_neigh->next;
+ }
+
+ if (rose_neigh == NULL) {
+ rose_neigh = kmalloc(sizeof(*rose_neigh), GFP_ATOMIC);
+ if (rose_neigh == NULL) {
+ res = -ENOMEM;
+ goto out;
+ }
+
+ rose_neigh->callsign = rose_route->neighbour;
+ rose_neigh->digipeat = NULL;
+ rose_neigh->ax25 = NULL;
+ rose_neigh->dev = dev;
+ rose_neigh->count = 0;
+ rose_neigh->use = 0;
+ rose_neigh->dce_mode = 0;
+ rose_neigh->loopback = 0;
+ rose_neigh->number = rose_neigh_no++;
+ rose_neigh->restarted = 0;
+
+ skb_queue_head_init(&rose_neigh->queue);
+
+ init_timer(&rose_neigh->ftimer);
+ init_timer(&rose_neigh->t0timer);
+
+ if (rose_route->ndigis != 0) {
+ if ((rose_neigh->digipeat = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
+ kfree(rose_neigh);
+ res = -ENOMEM;
+ goto out;
+ }
+
+ rose_neigh->digipeat->ndigi = rose_route->ndigis;
+ rose_neigh->digipeat->lastrepeat = -1;
+
+ for (i = 0; i < rose_route->ndigis; i++) {
+ rose_neigh->digipeat->calls[i] =
+ rose_route->digipeaters[i];
+ rose_neigh->digipeat->repeated[i] = 0;
+ }
+ }
+
+ rose_neigh->next = rose_neigh_list;
+ rose_neigh_list = rose_neigh;
+ }
+
+ /*
+ * This is a new node to be inserted into the list. Find where it needs
+ * to be inserted into the list, and insert it. We want to be sure
+ * to order the list in descending order of mask size to ensure that
+ * later when we are searching this list the first match will be the
+ * best match.
+ */
+ if (rose_node == NULL) {
+ rose_tmpn = rose_node_list;
+ rose_tmpp = NULL;
+
+ while (rose_tmpn != NULL) {
+ if (rose_tmpn->mask > rose_route->mask) {
+ rose_tmpp = rose_tmpn;
+ rose_tmpn = rose_tmpn->next;
+ } else {
+ break;
+ }
+ }
+
+ /* create new node */
+ rose_node = kmalloc(sizeof(*rose_node), GFP_ATOMIC);
+ if (rose_node == NULL) {
+ res = -ENOMEM;
+ goto out;
+ }
+
+ rose_node->address = rose_route->address;
+ rose_node->mask = rose_route->mask;
+ rose_node->count = 1;
+ rose_node->loopback = 0;
+ rose_node->neighbour[0] = rose_neigh;
+
+ if (rose_tmpn == NULL) {
+ if (rose_tmpp == NULL) { /* Empty list */
+ rose_node_list = rose_node;
+ rose_node->next = NULL;
+ } else {
+ rose_tmpp->next = rose_node;
+ rose_node->next = NULL;
+ }
+ } else {
+ if (rose_tmpp == NULL) { /* 1st node */
+ rose_node->next = rose_node_list;
+ rose_node_list = rose_node;
+ } else {
+ rose_tmpp->next = rose_node;
+ rose_node->next = rose_tmpn;
+ }
+ }
+ rose_neigh->count++;
+
+ goto out;
+ }
+
+ /* We have space, slot it in */
+ if (rose_node->count < 3) {
+ rose_node->neighbour[rose_node->count] = rose_neigh;
+ rose_node->count++;
+ rose_neigh->count++;
+ }
+
+out:
+ spin_unlock_bh(&rose_neigh_list_lock);
+ spin_unlock_bh(&rose_node_list_lock);
+
+ return res;
+}
+
+/*
+ * Caller is holding rose_node_list_lock.
+ */
+static void rose_remove_node(struct rose_node *rose_node)
+{
+ struct rose_node *s;
+
+ if ((s = rose_node_list) == rose_node) {
+ rose_node_list = rose_node->next;
+ kfree(rose_node);
+ return;
+ }
+
+ while (s != NULL && s->next != NULL) {
+ if (s->next == rose_node) {
+ s->next = rose_node->next;
+ kfree(rose_node);
+ return;
+ }
+
+ s = s->next;
+ }
+}
+
+/*
+ * Caller is holding rose_neigh_list_lock.
+ */
+static void rose_remove_neigh(struct rose_neigh *rose_neigh)
+{
+ struct rose_neigh *s;
+
+ rose_stop_ftimer(rose_neigh);
+ rose_stop_t0timer(rose_neigh);
+
+ skb_queue_purge(&rose_neigh->queue);
+
+ spin_lock_bh(&rose_neigh_list_lock);
+
+ if ((s = rose_neigh_list) == rose_neigh) {
+ rose_neigh_list = rose_neigh->next;
+ spin_unlock_bh(&rose_neigh_list_lock);
+ if (rose_neigh->digipeat != NULL)
+ kfree(rose_neigh->digipeat);
+ kfree(rose_neigh);
+ return;
+ }
+
+ while (s != NULL && s->next != NULL) {
+ if (s->next == rose_neigh) {
+ s->next = rose_neigh->next;
+ spin_unlock_bh(&rose_neigh_list_lock);
+ if (rose_neigh->digipeat != NULL)
+ kfree(rose_neigh->digipeat);
+ kfree(rose_neigh);
+ return;
+ }
+
+ s = s->next;
+ }
+ spin_unlock_bh(&rose_neigh_list_lock);
+}
+
+/*
+ * Caller is holding rose_route_list_lock.
+ */
+static void rose_remove_route(struct rose_route *rose_route)
+{
+ struct rose_route *s;
+
+ if (rose_route->neigh1 != NULL)
+ rose_route->neigh1->use--;
+
+ if (rose_route->neigh2 != NULL)
+ rose_route->neigh2->use--;
+
+ if ((s = rose_route_list) == rose_route) {
+ rose_route_list = rose_route->next;
+ kfree(rose_route);
+ return;
+ }
+
+ while (s != NULL && s->next != NULL) {
+ if (s->next == rose_route) {
+ s->next = rose_route->next;
+ kfree(rose_route);
+ return;
+ }
+
+ s = s->next;
+ }
+}
+
+/*
+ * "Delete" a node. Strictly speaking remove a route to a node. The node
+ * is only deleted if no routes are left to it.
+ */
+static int rose_del_node(struct rose_route_struct *rose_route,
+ struct net_device *dev)
+{
+ struct rose_node *rose_node;
+ struct rose_neigh *rose_neigh;
+ int i, err = 0;
+
+ spin_lock_bh(&rose_node_list_lock);
+ spin_lock_bh(&rose_neigh_list_lock);
+
+ rose_node = rose_node_list;
+ while (rose_node != NULL) {
+ if ((rose_node->mask == rose_route->mask) &&
+ (rosecmpm(&rose_route->address, &rose_node->address,
+ rose_route->mask) == 0))
+ break;
+ rose_node = rose_node->next;
+ }
+
+ if (rose_node == NULL || rose_node->loopback) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ rose_neigh = rose_neigh_list;
+ while (rose_neigh != NULL) {
+ if (ax25cmp(&rose_route->neighbour, &rose_neigh->callsign) == 0
+ && rose_neigh->dev == dev)
+ break;
+ rose_neigh = rose_neigh->next;
+ }
+
+ if (rose_neigh == NULL) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ for (i = 0; i < rose_node->count; i++) {
+ if (rose_node->neighbour[i] == rose_neigh) {
+ rose_neigh->count--;
+
+ if (rose_neigh->count == 0 && rose_neigh->use == 0)
+ rose_remove_neigh(rose_neigh);
+
+ rose_node->count--;
+
+ if (rose_node->count == 0) {
+ rose_remove_node(rose_node);
+ } else {
+ switch (i) {
+ case 0:
+ rose_node->neighbour[0] =
+ rose_node->neighbour[1];
+ case 1:
+ rose_node->neighbour[1] =
+ rose_node->neighbour[2];
+ case 2:
+ break;
+ }
+ }
+ goto out;
+ }
+ }
+ err = -EINVAL;
+
+out:
+ spin_unlock_bh(&rose_neigh_list_lock);
+ spin_unlock_bh(&rose_node_list_lock);
+
+ return err;
+}
+
+/*
+ * Add the loopback neighbour.
+ */
+int rose_add_loopback_neigh(void)
+{
+ if ((rose_loopback_neigh = kmalloc(sizeof(struct rose_neigh), GFP_ATOMIC)) == NULL)
+ return -ENOMEM;
+
+ rose_loopback_neigh->callsign = null_ax25_address;
+ rose_loopback_neigh->digipeat = NULL;
+ rose_loopback_neigh->ax25 = NULL;
+ rose_loopback_neigh->dev = NULL;
+ rose_loopback_neigh->count = 0;
+ rose_loopback_neigh->use = 0;
+ rose_loopback_neigh->dce_mode = 1;
+ rose_loopback_neigh->loopback = 1;
+ rose_loopback_neigh->number = rose_neigh_no++;
+ rose_loopback_neigh->restarted = 1;
+
+ skb_queue_head_init(&rose_loopback_neigh->queue);
+
+ init_timer(&rose_loopback_neigh->ftimer);
+ init_timer(&rose_loopback_neigh->t0timer);
+
+ spin_lock_bh(&rose_neigh_list_lock);
+ rose_loopback_neigh->next = rose_neigh_list;
+ rose_neigh_list = rose_loopback_neigh;
+ spin_unlock_bh(&rose_neigh_list_lock);
+
+ return 0;
+}
+
+/*
+ * Add a loopback node.
+ */
+int rose_add_loopback_node(rose_address *address)
+{
+ struct rose_node *rose_node;
+ unsigned int err = 0;
+
+ spin_lock_bh(&rose_node_list_lock);
+
+ rose_node = rose_node_list;
+ while (rose_node != NULL) {
+ if ((rose_node->mask == 10) &&
+ (rosecmpm(address, &rose_node->address, 10) == 0) &&
+ rose_node->loopback)
+ break;
+ rose_node = rose_node->next;
+ }
+
+ if (rose_node != NULL)
+ goto out;
+
+ if ((rose_node = kmalloc(sizeof(*rose_node), GFP_ATOMIC)) == NULL) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ rose_node->address = *address;
+ rose_node->mask = 10;
+ rose_node->count = 1;
+ rose_node->loopback = 1;
+ rose_node->neighbour[0] = rose_loopback_neigh;
+
+ /* Insert at the head of list. Address is always mask=10 */
+ rose_node->next = rose_node_list;
+ rose_node_list = rose_node;
+
+ rose_loopback_neigh->count++;
+
+out:
+ spin_unlock_bh(&rose_node_list_lock);
+
+ return 0;
+}
+
+/*
+ * Delete a loopback node.
+ */
+void rose_del_loopback_node(rose_address *address)
+{
+ struct rose_node *rose_node;
+
+ spin_lock_bh(&rose_node_list_lock);
+
+ rose_node = rose_node_list;
+ while (rose_node != NULL) {
+ if ((rose_node->mask == 10) &&
+ (rosecmpm(address, &rose_node->address, 10) == 0) &&
+ rose_node->loopback)
+ break;
+ rose_node = rose_node->next;
+ }
+
+ if (rose_node == NULL)
+ goto out;
+
+ rose_remove_node(rose_node);
+
+ rose_loopback_neigh->count--;
+
+out:
+ spin_unlock_bh(&rose_node_list_lock);
+}
+
+/*
+ * A device has been removed. Remove its routes and neighbours.
+ */
+void rose_rt_device_down(struct net_device *dev)
+{
+ struct rose_neigh *s, *rose_neigh;
+ struct rose_node *t, *rose_node;
+ int i;
+
+ spin_lock_bh(&rose_node_list_lock);
+ spin_lock_bh(&rose_neigh_list_lock);
+ rose_neigh = rose_neigh_list;
+ while (rose_neigh != NULL) {
+ s = rose_neigh;
+ rose_neigh = rose_neigh->next;
+
+ if (s->dev != dev)
+ continue;
+
+ rose_node = rose_node_list;
+
+ while (rose_node != NULL) {
+ t = rose_node;
+ rose_node = rose_node->next;
+
+ for (i = 0; i < t->count; i++) {
+ if (t->neighbour[i] != s)
+ continue;
+
+ t->count--;
+
+ switch (i) {
+ case 0:
+ t->neighbour[0] = t->neighbour[1];
+ case 1:
+ t->neighbour[1] = t->neighbour[2];
+ case 2:
+ break;
+ }
+ }
+
+ if (t->count <= 0)
+ rose_remove_node(t);
+ }
+
+ rose_remove_neigh(s);
+ }
+ spin_unlock_bh(&rose_neigh_list_lock);
+ spin_unlock_bh(&rose_node_list_lock);
+}
+
+#if 0 /* Currently unused */
+/*
+ * A device has been removed. Remove its links.
+ */
+void rose_route_device_down(struct net_device *dev)
+{
+ struct rose_route *s, *rose_route;
+
+ spin_lock_bh(&rose_route_list_lock);
+ rose_route = rose_route_list;
+ while (rose_route != NULL) {
+ s = rose_route;
+ rose_route = rose_route->next;
+
+ if (s->neigh1->dev == dev || s->neigh2->dev == dev)
+ rose_remove_route(s);
+ }
+ spin_unlock_bh(&rose_route_list_lock);
+}
+#endif
+
+/*
+ * Clear all nodes and neighbours out, except for neighbours with
+ * active connections going through them.
+ * Do not clear loopback neighbour and nodes.
+ */
+static int rose_clear_routes(void)
+{
+ struct rose_neigh *s, *rose_neigh;
+ struct rose_node *t, *rose_node;
+
+ spin_lock_bh(&rose_node_list_lock);
+ spin_lock_bh(&rose_neigh_list_lock);
+
+ rose_neigh = rose_neigh_list;
+ rose_node = rose_node_list;
+
+ while (rose_node != NULL) {
+ t = rose_node;
+ rose_node = rose_node->next;
+ if (!t->loopback)
+ rose_remove_node(t);
+ }
+
+ while (rose_neigh != NULL) {
+ s = rose_neigh;
+ rose_neigh = rose_neigh->next;
+
+ if (s->use == 0 && !s->loopback) {
+ s->count = 0;
+ rose_remove_neigh(s);
+ }
+ }
+
+ spin_unlock_bh(&rose_neigh_list_lock);
+ spin_unlock_bh(&rose_node_list_lock);
+
+ return 0;
+}
+
+/*
+ * Check that the device given is a valid AX.25 interface that is "up".
+ */
+static struct net_device *rose_ax25_dev_get(char *devname)
+{
+ struct net_device *dev;
+
+ if ((dev = dev_get_by_name(devname)) == NULL)
+ return NULL;
+
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
+ return dev;
+
+ dev_put(dev);
+ return NULL;
+}
+
+/*
+ * Find the first active ROSE device, usually "rose0".
+ */
+struct net_device *rose_dev_first(void)
+{
+ struct net_device *dev, *first = NULL;
+
+ read_lock(&dev_base_lock);
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE)
+ if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
+ first = dev;
+ }
+ read_unlock(&dev_base_lock);
+
+ return first;
+}
+
+/*
+ * Find the ROSE device for the given address.
+ */
+struct net_device *rose_dev_get(rose_address *addr)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0) {
+ dev_hold(dev);
+ goto out;
+ }
+ }
+out:
+ read_unlock(&dev_base_lock);
+ return dev;
+}
+
+static int rose_dev_exists(rose_address *addr)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0)
+ goto out;
+ }
+out:
+ read_unlock(&dev_base_lock);
+ return dev != NULL;
+}
+
+
+
+
+struct rose_route *rose_route_free_lci(unsigned int lci, struct rose_neigh *neigh)
+{
+ struct rose_route *rose_route;
+
+ for (rose_route = rose_route_list; rose_route != NULL; rose_route = rose_route->next)
+ if ((rose_route->neigh1 == neigh && rose_route->lci1 == lci) ||
+ (rose_route->neigh2 == neigh && rose_route->lci2 == lci))
+ return rose_route;
+
+ return NULL;
+}
+
+/*
+ * Find a neighbour given a ROSE address.
+ */
+struct rose_neigh *rose_get_neigh(rose_address *addr, unsigned char *cause,
+ unsigned char *diagnostic)
+{
+ struct rose_neigh *res = NULL;
+ struct rose_node *node;
+ int failed = 0;
+ int i;
+
+ spin_lock_bh(&rose_node_list_lock);
+ for (node = rose_node_list; node != NULL; node = node->next) {
+ if (rosecmpm(addr, &node->address, node->mask) == 0) {
+ for (i = 0; i < node->count; i++) {
+ if (!rose_ftimer_running(node->neighbour[i])) {
+ res = node->neighbour[i];
+ goto out;
+ } else
+ failed = 1;
+ }
+ break;
+ }
+ }
+
+ if (failed) {
+ *cause = ROSE_OUT_OF_ORDER;
+ *diagnostic = 0;
+ } else {
+ *cause = ROSE_NOT_OBTAINABLE;
+ *diagnostic = 0;
+ }
+
+out:
+ spin_unlock_bh(&rose_node_list_lock);
+
+ return res;
+}
+
+/*
+ * Handle the ioctls that control the routing functions.
+ */
+int rose_rt_ioctl(unsigned int cmd, void __user *arg)
+{
+ struct rose_route_struct rose_route;
+ struct net_device *dev;
+ int err;
+
+ switch (cmd) {
+ case SIOCADDRT:
+ if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
+ return -EFAULT;
+ if ((dev = rose_ax25_dev_get(rose_route.device)) == NULL)
+ return -EINVAL;
+ if (rose_dev_exists(&rose_route.address)) { /* Can't add routes to ourself */
+ dev_put(dev);
+ return -EINVAL;
+ }
+ if (rose_route.mask > 10) /* Mask can't be more than 10 digits */
+ return -EINVAL;
+ if (rose_route.ndigis > 8) /* No more than 8 digipeats */
+ return -EINVAL;
+ err = rose_add_node(&rose_route, dev);
+ dev_put(dev);
+ return err;
+
+ case SIOCDELRT:
+ if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
+ return -EFAULT;
+ if ((dev = rose_ax25_dev_get(rose_route.device)) == NULL)
+ return -EINVAL;
+ err = rose_del_node(&rose_route, dev);
+ dev_put(dev);
+ return err;
+
+ case SIOCRSCLRRT:
+ return rose_clear_routes();
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void rose_del_route_by_neigh(struct rose_neigh *rose_neigh)
+{
+ struct rose_route *rose_route, *s;
+
+ rose_neigh->restarted = 0;
+
+ rose_stop_t0timer(rose_neigh);
+ rose_start_ftimer(rose_neigh);
+
+ skb_queue_purge(&rose_neigh->queue);
+
+ spin_lock_bh(&rose_route_list_lock);
+
+ rose_route = rose_route_list;
+
+ while (rose_route != NULL) {
+ if ((rose_route->neigh1 == rose_neigh && rose_route->neigh2 == rose_neigh) ||
+ (rose_route->neigh1 == rose_neigh && rose_route->neigh2 == NULL) ||
+ (rose_route->neigh2 == rose_neigh && rose_route->neigh1 == NULL)) {
+ s = rose_route->next;
+ rose_remove_route(rose_route);
+ rose_route = s;
+ continue;
+ }
+
+ if (rose_route->neigh1 == rose_neigh) {
+ rose_route->neigh1->use--;
+ rose_route->neigh1 = NULL;
+ rose_transmit_clear_request(rose_route->neigh2, rose_route->lci2, ROSE_OUT_OF_ORDER, 0);
+ }
+
+ if (rose_route->neigh2 == rose_neigh) {
+ rose_route->neigh2->use--;
+ rose_route->neigh2 = NULL;
+ rose_transmit_clear_request(rose_route->neigh1, rose_route->lci1, ROSE_OUT_OF_ORDER, 0);
+ }
+
+ rose_route = rose_route->next;
+ }
+ spin_unlock_bh(&rose_route_list_lock);
+}
+
+/*
+ * A level 2 link has timed out, therefore it appears to be a poor link,
+ * then don't use that neighbour until it is reset. Blow away all through
+ * routes and connections using this route.
+ */
+void rose_link_failed(ax25_cb *ax25, int reason)
+{
+ struct rose_neigh *rose_neigh;
+
+ spin_lock_bh(&rose_neigh_list_lock);
+ rose_neigh = rose_neigh_list;
+ while (rose_neigh != NULL) {
+ if (rose_neigh->ax25 == ax25)
+ break;
+ rose_neigh = rose_neigh->next;
+ }
+
+ if (rose_neigh != NULL) {
+ rose_neigh->ax25 = NULL;
+
+ rose_del_route_by_neigh(rose_neigh);
+ rose_kill_by_neigh(rose_neigh);
+ }
+ spin_unlock_bh(&rose_neigh_list_lock);
+}
+
+/*
+ * A device has been "downed" remove its link status. Blow away all
+ * through routes and connections that use this device.
+ */
+void rose_link_device_down(struct net_device *dev)
+{
+ struct rose_neigh *rose_neigh;
+
+ for (rose_neigh = rose_neigh_list; rose_neigh != NULL; rose_neigh = rose_neigh->next) {
+ if (rose_neigh->dev == dev) {
+ rose_del_route_by_neigh(rose_neigh);
+ rose_kill_by_neigh(rose_neigh);
+ }
+ }
+}
+
+/*
+ * Route a frame to an appropriate AX.25 connection.
+ */
+int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25)
+{
+ struct rose_neigh *rose_neigh, *new_neigh;
+ struct rose_route *rose_route;
+ struct rose_facilities_struct facilities;
+ rose_address *src_addr, *dest_addr;
+ struct sock *sk;
+ unsigned short frametype;
+ unsigned int lci, new_lci;
+ unsigned char cause, diagnostic;
+ struct net_device *dev;
+ int len, res = 0;
+
+#if 0
+ if (call_in_firewall(PF_ROSE, skb->dev, skb->data, NULL, &skb) != FW_ACCEPT)
+ return res;
+#endif
+
+ frametype = skb->data[2];
+ lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
+ src_addr = (rose_address *)(skb->data + 9);
+ dest_addr = (rose_address *)(skb->data + 4);
+
+ spin_lock_bh(&rose_node_list_lock);
+ spin_lock_bh(&rose_neigh_list_lock);
+ spin_lock_bh(&rose_route_list_lock);
+
+ rose_neigh = rose_neigh_list;
+ while (rose_neigh != NULL) {
+ if (ax25cmp(&ax25->dest_addr, &rose_neigh->callsign) == 0 &&
+ ax25->ax25_dev->dev == rose_neigh->dev)
+ break;
+ rose_neigh = rose_neigh->next;
+ }
+
+ if (rose_neigh == NULL) {
+ printk("rose_route : unknown neighbour or device %s\n",
+ ax2asc(&ax25->dest_addr));
+ goto out;
+ }
+
+ /*
+ * Obviously the link is working, halt the ftimer.
+ */
+ rose_stop_ftimer(rose_neigh);
+
+ /*
+ * LCI of zero is always for us, and its always a restart
+ * frame.
+ */
+ if (lci == 0) {
+ rose_link_rx_restart(skb, rose_neigh, frametype);
+ goto out;
+ }
+
+ /*
+ * Find an existing socket.
+ */
+ if ((sk = rose_find_socket(lci, rose_neigh)) != NULL) {
+ if (frametype == ROSE_CALL_REQUEST) {
+ struct rose_sock *rose = rose_sk(sk);
+
+ /* Remove an existing unused socket */
+ rose_clear_queues(sk);
+ rose->cause = ROSE_NETWORK_CONGESTION;
+ rose->diagnostic = 0;
+ rose->neighbour->use--;
+ rose->neighbour = NULL;
+ rose->lci = 0;
+ rose->state = ROSE_STATE_0;
+ sk->sk_state = TCP_CLOSE;
+ sk->sk_err = 0;
+ sk->sk_shutdown |= SEND_SHUTDOWN;
+ if (!sock_flag(sk, SOCK_DEAD)) {
+ sk->sk_state_change(sk);
+ sock_set_flag(sk, SOCK_DEAD);
+ }
+ }
+ else {
+ skb->h.raw = skb->data;
+ res = rose_process_rx_frame(sk, skb);
+ goto out;
+ }
+ }
+
+ /*
+ * Is is a Call Request and is it for us ?
+ */
+ if (frametype == ROSE_CALL_REQUEST)
+ if ((dev = rose_dev_get(dest_addr)) != NULL) {
+ res = rose_rx_call_request(skb, dev, rose_neigh, lci);
+ dev_put(dev);
+ goto out;
+ }
+
+ if (!sysctl_rose_routing_control) {
+ rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 0);
+ goto out;
+ }
+
+ /*
+ * Route it to the next in line if we have an entry for it.
+ */
+ rose_route = rose_route_list;
+ while (rose_route != NULL) {
+ if (rose_route->lci1 == lci &&
+ rose_route->neigh1 == rose_neigh) {
+ if (frametype == ROSE_CALL_REQUEST) {
+ /* F6FBB - Remove an existing unused route */
+ rose_remove_route(rose_route);
+ break;
+ } else if (rose_route->neigh2 != NULL) {
+ skb->data[0] &= 0xF0;
+ skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
+ skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
+ rose_transmit_link(skb, rose_route->neigh2);
+ if (frametype == ROSE_CLEAR_CONFIRMATION)
+ rose_remove_route(rose_route);
+ res = 1;
+ goto out;
+ } else {
+ if (frametype == ROSE_CLEAR_CONFIRMATION)
+ rose_remove_route(rose_route);
+ goto out;
+ }
+ }
+ if (rose_route->lci2 == lci &&
+ rose_route->neigh2 == rose_neigh) {
+ if (frametype == ROSE_CALL_REQUEST) {
+ /* F6FBB - Remove an existing unused route */
+ rose_remove_route(rose_route);
+ break;
+ } else if (rose_route->neigh1 != NULL) {
+ skb->data[0] &= 0xF0;
+ skb->data[0] |= (rose_route->lci1 >> 8) & 0x0F;
+ skb->data[1] = (rose_route->lci1 >> 0) & 0xFF;
+ rose_transmit_link(skb, rose_route->neigh1);
+ if (frametype == ROSE_CLEAR_CONFIRMATION)
+ rose_remove_route(rose_route);
+ res = 1;
+ goto out;
+ } else {
+ if (frametype == ROSE_CLEAR_CONFIRMATION)
+ rose_remove_route(rose_route);
+ goto out;
+ }
+ }
+ rose_route = rose_route->next;
+ }
+
+ /*
+ * We know that:
+ * 1. The frame isn't for us,
+ * 2. It isn't "owned" by any existing route.
+ */
+ if (frametype != ROSE_CALL_REQUEST) /* XXX */
+ return 0;
+
+ len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
+ len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
+
+ memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
+
+ if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
+ rose_transmit_clear_request(rose_neigh, lci, ROSE_INVALID_FACILITY, 76);
+ goto out;
+ }
+
+ /*
+ * Check for routing loops.
+ */
+ rose_route = rose_route_list;
+ while (rose_route != NULL) {
+ if (rose_route->rand == facilities.rand &&
+ rosecmp(src_addr, &rose_route->src_addr) == 0 &&
+ ax25cmp(&facilities.dest_call, &rose_route->src_call) == 0 &&
+ ax25cmp(&facilities.source_call, &rose_route->dest_call) == 0) {
+ rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 120);
+ goto out;
+ }
+ rose_route = rose_route->next;
+ }
+
+ if ((new_neigh = rose_get_neigh(dest_addr, &cause, &diagnostic)) == NULL) {
+ rose_transmit_clear_request(rose_neigh, lci, cause, diagnostic);
+ goto out;
+ }
+
+ if ((new_lci = rose_new_lci(new_neigh)) == 0) {
+ rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 71);
+ goto out;
+ }
+
+ if ((rose_route = kmalloc(sizeof(*rose_route), GFP_ATOMIC)) == NULL) {
+ rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 120);
+ goto out;
+ }
+
+ rose_route->lci1 = lci;
+ rose_route->src_addr = *src_addr;
+ rose_route->dest_addr = *dest_addr;
+ rose_route->src_call = facilities.dest_call;
+ rose_route->dest_call = facilities.source_call;
+ rose_route->rand = facilities.rand;
+ rose_route->neigh1 = rose_neigh;
+ rose_route->lci2 = new_lci;
+ rose_route->neigh2 = new_neigh;
+
+ rose_route->neigh1->use++;
+ rose_route->neigh2->use++;
+
+ rose_route->next = rose_route_list;
+ rose_route_list = rose_route;
+
+ skb->data[0] &= 0xF0;
+ skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
+ skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
+
+ rose_transmit_link(skb, rose_route->neigh2);
+ res = 1;
+
+out:
+ spin_unlock_bh(&rose_route_list_lock);
+ spin_unlock_bh(&rose_neigh_list_lock);
+ spin_unlock_bh(&rose_node_list_lock);
+
+ return res;
+}
+
+#ifdef CONFIG_PROC_FS
+
+static void *rose_node_start(struct seq_file *seq, loff_t *pos)
+{
+ struct rose_node *rose_node;
+ int i = 1;
+
+ spin_lock_bh(&rose_neigh_list_lock);
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
+ for (rose_node = rose_node_list; rose_node && i < *pos;
+ rose_node = rose_node->next, ++i);
+
+ return (i == *pos) ? rose_node : NULL;
+}
+
+static void *rose_node_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+
+ return (v == SEQ_START_TOKEN) ? rose_node_list
+ : ((struct rose_node *)v)->next;
+}
+
+static void rose_node_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock_bh(&rose_neigh_list_lock);
+}
+
+static int rose_node_show(struct seq_file *seq, void *v)
+{
+ int i;
+
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq, "address mask n neigh neigh neigh\n");
+ else {
+ const struct rose_node *rose_node = v;
+ /* if (rose_node->loopback) {
+ seq_printf(seq, "%-10s %04d 1 loopback\n",
+ rose2asc(&rose_node->address),
+ rose_node->mask);
+ } else { */
+ seq_printf(seq, "%-10s %04d %d",
+ rose2asc(&rose_node->address),
+ rose_node->mask,
+ rose_node->count);
+
+ for (i = 0; i < rose_node->count; i++)
+ seq_printf(seq, " %05d",
+ rose_node->neighbour[i]->number);
+
+ seq_puts(seq, "\n");
+ /* } */
+ }
+ return 0;
+}
+
+static struct seq_operations rose_node_seqops = {
+ .start = rose_node_start,
+ .next = rose_node_next,
+ .stop = rose_node_stop,
+ .show = rose_node_show,
+};
+
+static int rose_nodes_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &rose_node_seqops);
+}
+
+struct file_operations rose_nodes_fops = {
+ .owner = THIS_MODULE,
+ .open = rose_nodes_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static void *rose_neigh_start(struct seq_file *seq, loff_t *pos)
+{
+ struct rose_neigh *rose_neigh;
+ int i = 1;
+
+ spin_lock_bh(&rose_neigh_list_lock);
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
+ for (rose_neigh = rose_neigh_list; rose_neigh && i < *pos;
+ rose_neigh = rose_neigh->next, ++i);
+
+ return (i == *pos) ? rose_neigh : NULL;
+}
+
+static void *rose_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+
+ return (v == SEQ_START_TOKEN) ? rose_neigh_list
+ : ((struct rose_neigh *)v)->next;
+}
+
+static void rose_neigh_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock_bh(&rose_neigh_list_lock);
+}
+
+static int rose_neigh_show(struct seq_file *seq, void *v)
+{
+ int i;
+
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq,
+ "addr callsign dev count use mode restart t0 tf digipeaters\n");
+ else {
+ struct rose_neigh *rose_neigh = v;
+
+ /* if (!rose_neigh->loopback) { */
+ seq_printf(seq, "%05d %-9s %-4s %3d %3d %3s %3s %3lu %3lu",
+ rose_neigh->number,
+ (rose_neigh->loopback) ? "RSLOOP-0" : ax2asc(&rose_neigh->callsign),
+ rose_neigh->dev ? rose_neigh->dev->name : "???",
+ rose_neigh->count,
+ rose_neigh->use,
+ (rose_neigh->dce_mode) ? "DCE" : "DTE",
+ (rose_neigh->restarted) ? "yes" : "no",
+ ax25_display_timer(&rose_neigh->t0timer) / HZ,
+ ax25_display_timer(&rose_neigh->ftimer) / HZ);
+
+ if (rose_neigh->digipeat != NULL) {
+ for (i = 0; i < rose_neigh->digipeat->ndigi; i++)
+ seq_printf(seq, " %s", ax2asc(&rose_neigh->digipeat->calls[i]));
+ }
+
+ seq_puts(seq, "\n");
+ }
+ return 0;
+}
+
+
+static struct seq_operations rose_neigh_seqops = {
+ .start = rose_neigh_start,
+ .next = rose_neigh_next,
+ .stop = rose_neigh_stop,
+ .show = rose_neigh_show,
+};
+
+static int rose_neigh_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &rose_neigh_seqops);
+}
+
+struct file_operations rose_neigh_fops = {
+ .owner = THIS_MODULE,
+ .open = rose_neigh_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+
+static void *rose_route_start(struct seq_file *seq, loff_t *pos)
+{
+ struct rose_route *rose_route;
+ int i = 1;
+
+ spin_lock_bh(&rose_route_list_lock);
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
+ for (rose_route = rose_route_list; rose_route && i < *pos;
+ rose_route = rose_route->next, ++i);
+
+ return (i == *pos) ? rose_route : NULL;
+}
+
+static void *rose_route_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+
+ return (v == SEQ_START_TOKEN) ? rose_route_list
+ : ((struct rose_route *)v)->next;
+}
+
+static void rose_route_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock_bh(&rose_route_list_lock);
+}
+
+static int rose_route_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq,
+ "lci address callsign neigh <-> lci address callsign neigh\n");
+ else {
+ struct rose_route *rose_route = v;
+
+ if (rose_route->neigh1)
+ seq_printf(seq,
+ "%3.3X %-10s %-9s %05d ",
+ rose_route->lci1,
+ rose2asc(&rose_route->src_addr),
+ ax2asc(&rose_route->src_call),
+ rose_route->neigh1->number);
+ else
+ seq_puts(seq,
+ "000 * * 00000 ");
+
+ if (rose_route->neigh2)
+ seq_printf(seq,
+ "%3.3X %-10s %-9s %05d\n",
+ rose_route->lci2,
+ rose2asc(&rose_route->dest_addr),
+ ax2asc(&rose_route->dest_call),
+ rose_route->neigh2->number);
+ else
+ seq_puts(seq,
+ "000 * * 00000\n");
+ }
+ return 0;
+}
+
+static struct seq_operations rose_route_seqops = {
+ .start = rose_route_start,
+ .next = rose_route_next,
+ .stop = rose_route_stop,
+ .show = rose_route_show,
+};
+
+static int rose_route_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &rose_route_seqops);
+}
+
+struct file_operations rose_routes_fops = {
+ .owner = THIS_MODULE,
+ .open = rose_route_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#endif /* CONFIG_PROC_FS */
+
+/*
+ * Release all memory associated with ROSE routing structures.
+ */
+void __exit rose_rt_free(void)
+{
+ struct rose_neigh *s, *rose_neigh = rose_neigh_list;
+ struct rose_node *t, *rose_node = rose_node_list;
+ struct rose_route *u, *rose_route = rose_route_list;
+
+ while (rose_neigh != NULL) {
+ s = rose_neigh;
+ rose_neigh = rose_neigh->next;
+
+ rose_remove_neigh(s);
+ }
+
+ while (rose_node != NULL) {
+ t = rose_node;
+ rose_node = rose_node->next;
+
+ rose_remove_node(t);
+ }
+
+ while (rose_route != NULL) {
+ u = rose_route;
+ rose_route = rose_route->next;
+
+ rose_remove_route(u);
+ }
+}
