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-rw-r--r--net/rose/Makefile9
-rw-r--r--net/rose/af_rose.c1636
-rw-r--r--net/rose/rose_dev.c144
-rw-r--r--net/rose/rose_in.c294
-rw-r--r--net/rose/rose_link.c292
-rw-r--r--net/rose/rose_loopback.c124
-rw-r--r--net/rose/rose_out.c125
-rw-r--r--net/rose/rose_route.c1366
-rw-r--r--net/rose/rose_subr.c556
-rw-r--r--net/rose/rose_timer.c216
-rw-r--r--net/rose/sysctl_net_rose.c129
11 files changed, 4891 insertions, 0 deletions
diff --git a/net/rose/Makefile b/net/rose/Makefile
new file mode 100644
index 000000000..fa248116f
--- /dev/null
+++ b/net/rose/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the Linux Rose (X.25 PLP) layer.
+#
+
+obj-$(CONFIG_ROSE) += rose.o
+
+rose-y := af_rose.o rose_dev.o rose_in.o rose_link.o rose_loopback.o \
+ rose_out.o rose_route.o rose_subr.o rose_timer.o
+rose-$(CONFIG_SYSCTL) += sysctl_net_rose.o
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
new file mode 100644
index 000000000..8ae603069
--- /dev/null
+++ b/net/rose/af_rose.c
@@ -0,0 +1,1636 @@
+/*
+ * 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) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
+ * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
+ * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
+ */
+
+#include <linux/capability.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/stat.h>
+#include <net/net_namespace.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 <linux/fcntl.h>
+#include <linux/termios.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/notifier.h>
+#include <net/rose.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <net/tcp_states.h>
+#include <net/ip.h>
+#include <net/arp.h>
+
+static int rose_ndevs = 10;
+
+int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
+int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
+int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
+int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
+int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
+int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
+int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
+int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
+int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
+int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
+
+static HLIST_HEAD(rose_list);
+static DEFINE_SPINLOCK(rose_list_lock);
+
+static const struct proto_ops rose_proto_ops;
+
+ax25_address rose_callsign;
+
+/*
+ * ROSE network devices are virtual network devices encapsulating ROSE
+ * frames into AX.25 which will be sent through an AX.25 device, so form a
+ * special "super class" of normal net devices; split their locks off into a
+ * separate class since they always nest.
+ */
+static struct lock_class_key rose_netdev_xmit_lock_key;
+static struct lock_class_key rose_netdev_addr_lock_key;
+
+static void rose_set_lockdep_one(struct net_device *dev,
+ struct netdev_queue *txq,
+ void *_unused)
+{
+ lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
+}
+
+static void rose_set_lockdep_key(struct net_device *dev)
+{
+ lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
+ netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
+}
+
+/*
+ * Convert a ROSE address into text.
+ */
+char *rose2asc(char *buf, const rose_address *addr)
+{
+ if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
+ addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
+ addr->rose_addr[4] == 0x00) {
+ strcpy(buf, "*");
+ } else {
+ sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
+ addr->rose_addr[1] & 0xFF,
+ addr->rose_addr[2] & 0xFF,
+ addr->rose_addr[3] & 0xFF,
+ addr->rose_addr[4] & 0xFF);
+ }
+
+ return buf;
+}
+
+/*
+ * Compare two ROSE addresses, 0 == equal.
+ */
+int rosecmp(rose_address *addr1, rose_address *addr2)
+{
+ int i;
+
+ for (i = 0; i < 5; i++)
+ if (addr1->rose_addr[i] != addr2->rose_addr[i])
+ return 1;
+
+ return 0;
+}
+
+/*
+ * Compare two ROSE addresses for only mask digits, 0 == equal.
+ */
+int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
+{
+ unsigned int i, j;
+
+ if (mask > 10)
+ return 1;
+
+ for (i = 0; i < mask; i++) {
+ j = i / 2;
+
+ if ((i % 2) != 0) {
+ if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
+ return 1;
+ } else {
+ if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Socket removal during an interrupt is now safe.
+ */
+static void rose_remove_socket(struct sock *sk)
+{
+ spin_lock_bh(&rose_list_lock);
+ sk_del_node_init(sk);
+ spin_unlock_bh(&rose_list_lock);
+}
+
+/*
+ * Kill all bound sockets on a broken link layer connection to a
+ * particular neighbour.
+ */
+void rose_kill_by_neigh(struct rose_neigh *neigh)
+{
+ struct sock *s;
+
+ spin_lock_bh(&rose_list_lock);
+ sk_for_each(s, &rose_list) {
+ struct rose_sock *rose = rose_sk(s);
+
+ if (rose->neighbour == neigh) {
+ rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
+ rose->neighbour->use--;
+ rose->neighbour = NULL;
+ }
+ }
+ spin_unlock_bh(&rose_list_lock);
+}
+
+/*
+ * Kill all bound sockets on a dropped device.
+ */
+static void rose_kill_by_device(struct net_device *dev)
+{
+ struct sock *s;
+
+ spin_lock_bh(&rose_list_lock);
+ sk_for_each(s, &rose_list) {
+ struct rose_sock *rose = rose_sk(s);
+
+ if (rose->device == dev) {
+ rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
+ rose->neighbour->use--;
+ rose->device = NULL;
+ }
+ }
+ spin_unlock_bh(&rose_list_lock);
+}
+
+/*
+ * Handle device status changes.
+ */
+static int rose_device_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+ if (!net_eq(dev_net(dev), &init_net))
+ return NOTIFY_DONE;
+
+ if (event != NETDEV_DOWN)
+ return NOTIFY_DONE;
+
+ switch (dev->type) {
+ case ARPHRD_ROSE:
+ rose_kill_by_device(dev);
+ break;
+ case ARPHRD_AX25:
+ rose_link_device_down(dev);
+ rose_rt_device_down(dev);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Add a socket to the bound sockets list.
+ */
+static void rose_insert_socket(struct sock *sk)
+{
+
+ spin_lock_bh(&rose_list_lock);
+ sk_add_node(sk, &rose_list);
+ spin_unlock_bh(&rose_list_lock);
+}
+
+/*
+ * Find a socket that wants to accept the Call Request we just
+ * received.
+ */
+static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
+{
+ struct sock *s;
+
+ spin_lock_bh(&rose_list_lock);
+ sk_for_each(s, &rose_list) {
+ struct rose_sock *rose = rose_sk(s);
+
+ if (!rosecmp(&rose->source_addr, addr) &&
+ !ax25cmp(&rose->source_call, call) &&
+ !rose->source_ndigis && s->sk_state == TCP_LISTEN)
+ goto found;
+ }
+
+ sk_for_each(s, &rose_list) {
+ struct rose_sock *rose = rose_sk(s);
+
+ if (!rosecmp(&rose->source_addr, addr) &&
+ !ax25cmp(&rose->source_call, &null_ax25_address) &&
+ s->sk_state == TCP_LISTEN)
+ goto found;
+ }
+ s = NULL;
+found:
+ spin_unlock_bh(&rose_list_lock);
+ return s;
+}
+
+/*
+ * Find a connected ROSE socket given my LCI and device.
+ */
+struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
+{
+ struct sock *s;
+
+ spin_lock_bh(&rose_list_lock);
+ sk_for_each(s, &rose_list) {
+ struct rose_sock *rose = rose_sk(s);
+
+ if (rose->lci == lci && rose->neighbour == neigh)
+ goto found;
+ }
+ s = NULL;
+found:
+ spin_unlock_bh(&rose_list_lock);
+ return s;
+}
+
+/*
+ * Find a unique LCI for a given device.
+ */
+unsigned int rose_new_lci(struct rose_neigh *neigh)
+{
+ int lci;
+
+ if (neigh->dce_mode) {
+ for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
+ if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
+ return lci;
+ } else {
+ for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
+ if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
+ return lci;
+ }
+
+ return 0;
+}
+
+/*
+ * Deferred destroy.
+ */
+void rose_destroy_socket(struct sock *);
+
+/*
+ * Handler for deferred kills.
+ */
+static void rose_destroy_timer(unsigned long data)
+{
+ rose_destroy_socket((struct sock *)data);
+}
+
+/*
+ * 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 rose_destroy_socket(struct sock *sk)
+{
+ struct sk_buff *skb;
+
+ rose_remove_socket(sk);
+ rose_stop_heartbeat(sk);
+ rose_stop_idletimer(sk);
+ rose_stop_timer(sk);
+
+ rose_clear_queues(sk); /* Flush the queues */
+
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ if (skb->sk != sk) { /* A pending connection */
+ /* Queue the unaccepted socket for death */
+ sock_set_flag(skb->sk, SOCK_DEAD);
+ rose_start_heartbeat(skb->sk);
+ rose_sk(skb->sk)->state = ROSE_STATE_0;
+ }
+
+ kfree_skb(skb);
+ }
+
+ if (sk_has_allocations(sk)) {
+ /* Defer: outstanding buffers */
+ setup_timer(&sk->sk_timer, rose_destroy_timer,
+ (unsigned long)sk);
+ sk->sk_timer.expires = jiffies + 10 * HZ;
+ add_timer(&sk->sk_timer);
+ } else
+ sock_put(sk);
+}
+
+/*
+ * Handling for system calls applied via the various interfaces to a
+ * ROSE socket object.
+ */
+
+static int rose_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, unsigned int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ int opt;
+
+ if (level != SOL_ROSE)
+ return -ENOPROTOOPT;
+
+ if (optlen < sizeof(int))
+ return -EINVAL;
+
+ if (get_user(opt, (int __user *)optval))
+ return -EFAULT;
+
+ switch (optname) {
+ case ROSE_DEFER:
+ rose->defer = opt ? 1 : 0;
+ return 0;
+
+ case ROSE_T1:
+ if (opt < 1)
+ return -EINVAL;
+ rose->t1 = opt * HZ;
+ return 0;
+
+ case ROSE_T2:
+ if (opt < 1)
+ return -EINVAL;
+ rose->t2 = opt * HZ;
+ return 0;
+
+ case ROSE_T3:
+ if (opt < 1)
+ return -EINVAL;
+ rose->t3 = opt * HZ;
+ return 0;
+
+ case ROSE_HOLDBACK:
+ if (opt < 1)
+ return -EINVAL;
+ rose->hb = opt * HZ;
+ return 0;
+
+ case ROSE_IDLE:
+ if (opt < 0)
+ return -EINVAL;
+ rose->idle = opt * 60 * HZ;
+ return 0;
+
+ case ROSE_QBITINCL:
+ rose->qbitincl = opt ? 1 : 0;
+ return 0;
+
+ default:
+ return -ENOPROTOOPT;
+ }
+}
+
+static int rose_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ int val = 0;
+ int len;
+
+ if (level != SOL_ROSE)
+ return -ENOPROTOOPT;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ if (len < 0)
+ return -EINVAL;
+
+ switch (optname) {
+ case ROSE_DEFER:
+ val = rose->defer;
+ break;
+
+ case ROSE_T1:
+ val = rose->t1 / HZ;
+ break;
+
+ case ROSE_T2:
+ val = rose->t2 / HZ;
+ break;
+
+ case ROSE_T3:
+ val = rose->t3 / HZ;
+ break;
+
+ case ROSE_HOLDBACK:
+ val = rose->hb / HZ;
+ break;
+
+ case ROSE_IDLE:
+ val = rose->idle / (60 * HZ);
+ break;
+
+ case ROSE_QBITINCL:
+ val = rose->qbitincl;
+ break;
+
+ default:
+ return -ENOPROTOOPT;
+ }
+
+ len = min_t(unsigned int, len, sizeof(int));
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+
+ return copy_to_user(optval, &val, len) ? -EFAULT : 0;
+}
+
+static int rose_listen(struct socket *sock, int backlog)
+{
+ struct sock *sk = sock->sk;
+
+ if (sk->sk_state != TCP_LISTEN) {
+ struct rose_sock *rose = rose_sk(sk);
+
+ rose->dest_ndigis = 0;
+ memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
+ memset(&rose->dest_call, 0, AX25_ADDR_LEN);
+ memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
+ sk->sk_max_ack_backlog = backlog;
+ sk->sk_state = TCP_LISTEN;
+ return 0;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static struct proto rose_proto = {
+ .name = "ROSE",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct rose_sock),
+};
+
+static int rose_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
+{
+ struct sock *sk;
+ struct rose_sock *rose;
+
+ if (!net_eq(net, &init_net))
+ return -EAFNOSUPPORT;
+
+ if (sock->type != SOCK_SEQPACKET || protocol != 0)
+ return -ESOCKTNOSUPPORT;
+
+ sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
+ if (sk == NULL)
+ return -ENOMEM;
+
+ rose = rose_sk(sk);
+
+ sock_init_data(sock, sk);
+
+ skb_queue_head_init(&rose->ack_queue);
+#ifdef M_BIT
+ skb_queue_head_init(&rose->frag_queue);
+ rose->fraglen = 0;
+#endif
+
+ sock->ops = &rose_proto_ops;
+ sk->sk_protocol = protocol;
+
+ init_timer(&rose->timer);
+ init_timer(&rose->idletimer);
+
+ rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
+ rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
+ rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
+ rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
+ rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
+
+ rose->state = ROSE_STATE_0;
+
+ return 0;
+}
+
+static struct sock *rose_make_new(struct sock *osk)
+{
+ struct sock *sk;
+ struct rose_sock *rose, *orose;
+
+ if (osk->sk_type != SOCK_SEQPACKET)
+ return NULL;
+
+ sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
+ if (sk == NULL)
+ return NULL;
+
+ rose = rose_sk(sk);
+
+ sock_init_data(NULL, sk);
+
+ skb_queue_head_init(&rose->ack_queue);
+#ifdef M_BIT
+ skb_queue_head_init(&rose->frag_queue);
+ rose->fraglen = 0;
+#endif
+
+ sk->sk_type = osk->sk_type;
+ sk->sk_priority = osk->sk_priority;
+ sk->sk_protocol = osk->sk_protocol;
+ sk->sk_rcvbuf = osk->sk_rcvbuf;
+ sk->sk_sndbuf = osk->sk_sndbuf;
+ sk->sk_state = TCP_ESTABLISHED;
+ sock_copy_flags(sk, osk);
+
+ init_timer(&rose->timer);
+ init_timer(&rose->idletimer);
+
+ orose = rose_sk(osk);
+ rose->t1 = orose->t1;
+ rose->t2 = orose->t2;
+ rose->t3 = orose->t3;
+ rose->hb = orose->hb;
+ rose->idle = orose->idle;
+ rose->defer = orose->defer;
+ rose->device = orose->device;
+ rose->qbitincl = orose->qbitincl;
+
+ return sk;
+}
+
+static int rose_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose;
+
+ if (sk == NULL) return 0;
+
+ sock_hold(sk);
+ sock_orphan(sk);
+ lock_sock(sk);
+ rose = rose_sk(sk);
+
+ switch (rose->state) {
+ case ROSE_STATE_0:
+ release_sock(sk);
+ rose_disconnect(sk, 0, -1, -1);
+ lock_sock(sk);
+ rose_destroy_socket(sk);
+ break;
+
+ case ROSE_STATE_2:
+ rose->neighbour->use--;
+ release_sock(sk);
+ rose_disconnect(sk, 0, -1, -1);
+ lock_sock(sk);
+ rose_destroy_socket(sk);
+ break;
+
+ case ROSE_STATE_1:
+ case ROSE_STATE_3:
+ case ROSE_STATE_4:
+ case ROSE_STATE_5:
+ rose_clear_queues(sk);
+ rose_stop_idletimer(sk);
+ rose_write_internal(sk, ROSE_CLEAR_REQUEST);
+ rose_start_t3timer(sk);
+ rose->state = ROSE_STATE_2;
+ sk->sk_state = TCP_CLOSE;
+ sk->sk_shutdown |= SEND_SHUTDOWN;
+ sk->sk_state_change(sk);
+ sock_set_flag(sk, SOCK_DEAD);
+ sock_set_flag(sk, SOCK_DESTROY);
+ break;
+
+ default:
+ break;
+ }
+
+ sock->sk = NULL;
+ release_sock(sk);
+ sock_put(sk);
+
+ return 0;
+}
+
+static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
+ struct net_device *dev;
+ ax25_address *source;
+ ax25_uid_assoc *user;
+ int n;
+
+ if (!sock_flag(sk, SOCK_ZAPPED))
+ return -EINVAL;
+
+ if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
+ return -EINVAL;
+
+ if (addr->srose_family != AF_ROSE)
+ return -EINVAL;
+
+ if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
+ return -EINVAL;
+
+ if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
+ return -EINVAL;
+
+ if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
+ return -EADDRNOTAVAIL;
+
+ source = &addr->srose_call;
+
+ user = ax25_findbyuid(current_euid());
+ if (user) {
+ rose->source_call = user->call;
+ ax25_uid_put(user);
+ } else {
+ if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
+ return -EACCES;
+ rose->source_call = *source;
+ }
+
+ rose->source_addr = addr->srose_addr;
+ rose->device = dev;
+ rose->source_ndigis = addr->srose_ndigis;
+
+ if (addr_len == sizeof(struct full_sockaddr_rose)) {
+ struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
+ for (n = 0 ; n < addr->srose_ndigis ; n++)
+ rose->source_digis[n] = full_addr->srose_digis[n];
+ } else {
+ if (rose->source_ndigis == 1) {
+ rose->source_digis[0] = addr->srose_digi;
+ }
+ }
+
+ rose_insert_socket(sk);
+
+ sock_reset_flag(sk, SOCK_ZAPPED);
+
+ return 0;
+}
+
+static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
+ unsigned char cause, diagnostic;
+ struct net_device *dev;
+ ax25_uid_assoc *user;
+ int n, err = 0;
+
+ if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
+ return -EINVAL;
+
+ if (addr->srose_family != AF_ROSE)
+ return -EINVAL;
+
+ if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
+ return -EINVAL;
+
+ if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
+ return -EINVAL;
+
+ /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
+ if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
+ return -EINVAL;
+
+ lock_sock(sk);
+
+ if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
+ /* Connect completed during a ERESTARTSYS event */
+ sock->state = SS_CONNECTED;
+ goto out_release;
+ }
+
+ if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
+ sock->state = SS_UNCONNECTED;
+ err = -ECONNREFUSED;
+ goto out_release;
+ }
+
+ if (sk->sk_state == TCP_ESTABLISHED) {
+ /* No reconnect on a seqpacket socket */
+ err = -EISCONN;
+ goto out_release;
+ }
+
+ sk->sk_state = TCP_CLOSE;
+ sock->state = SS_UNCONNECTED;
+
+ rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
+ &diagnostic, 0);
+ if (!rose->neighbour) {
+ err = -ENETUNREACH;
+ goto out_release;
+ }
+
+ rose->lci = rose_new_lci(rose->neighbour);
+ if (!rose->lci) {
+ err = -ENETUNREACH;
+ goto out_release;
+ }
+
+ if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
+ sock_reset_flag(sk, SOCK_ZAPPED);
+
+ if ((dev = rose_dev_first()) == NULL) {
+ err = -ENETUNREACH;
+ goto out_release;
+ }
+
+ user = ax25_findbyuid(current_euid());
+ if (!user) {
+ err = -EINVAL;
+ goto out_release;
+ }
+
+ memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
+ rose->source_call = user->call;
+ rose->device = dev;
+ ax25_uid_put(user);
+
+ rose_insert_socket(sk); /* Finish the bind */
+ }
+ rose->dest_addr = addr->srose_addr;
+ rose->dest_call = addr->srose_call;
+ rose->rand = ((long)rose & 0xFFFF) + rose->lci;
+ rose->dest_ndigis = addr->srose_ndigis;
+
+ if (addr_len == sizeof(struct full_sockaddr_rose)) {
+ struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
+ for (n = 0 ; n < addr->srose_ndigis ; n++)
+ rose->dest_digis[n] = full_addr->srose_digis[n];
+ } else {
+ if (rose->dest_ndigis == 1) {
+ rose->dest_digis[0] = addr->srose_digi;
+ }
+ }
+
+ /* Move to connecting socket, start sending Connect Requests */
+ sock->state = SS_CONNECTING;
+ sk->sk_state = TCP_SYN_SENT;
+
+ rose->state = ROSE_STATE_1;
+
+ rose->neighbour->use++;
+
+ rose_write_internal(sk, ROSE_CALL_REQUEST);
+ rose_start_heartbeat(sk);
+ rose_start_t1timer(sk);
+
+ /* Now the loop */
+ if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
+ err = -EINPROGRESS;
+ goto out_release;
+ }
+
+ /*
+ * A Connect Ack with Choke or timeout or failed routing will go to
+ * closed.
+ */
+ if (sk->sk_state == TCP_SYN_SENT) {
+ DEFINE_WAIT(wait);
+
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait,
+ TASK_INTERRUPTIBLE);
+ if (sk->sk_state != TCP_SYN_SENT)
+ break;
+ if (!signal_pending(current)) {
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ continue;
+ }
+ err = -ERESTARTSYS;
+ break;
+ }
+ finish_wait(sk_sleep(sk), &wait);
+
+ if (err)
+ goto out_release;
+ }
+
+ if (sk->sk_state != TCP_ESTABLISHED) {
+ sock->state = SS_UNCONNECTED;
+ err = sock_error(sk); /* Always set at this point */
+ goto out_release;
+ }
+
+ sock->state = SS_CONNECTED;
+
+out_release:
+ release_sock(sk);
+
+ return err;
+}
+
+static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
+{
+ struct sk_buff *skb;
+ struct sock *newsk;
+ DEFINE_WAIT(wait);
+ struct sock *sk;
+ int err = 0;
+
+ if ((sk = sock->sk) == NULL)
+ return -EINVAL;
+
+ lock_sock(sk);
+ if (sk->sk_type != SOCK_SEQPACKET) {
+ err = -EOPNOTSUPP;
+ goto out_release;
+ }
+
+ if (sk->sk_state != TCP_LISTEN) {
+ err = -EINVAL;
+ goto out_release;
+ }
+
+ /*
+ * The write queue this time is holding sockets ready to use
+ * hooked into the SABM we saved
+ */
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+
+ skb = skb_dequeue(&sk->sk_receive_queue);
+ if (skb)
+ break;
+
+ if (flags & O_NONBLOCK) {
+ err = -EWOULDBLOCK;
+ break;
+ }
+ if (!signal_pending(current)) {
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ continue;
+ }
+ err = -ERESTARTSYS;
+ break;
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ if (err)
+ goto out_release;
+
+ newsk = skb->sk;
+ sock_graft(newsk, newsock);
+
+ /* Now attach up the new socket */
+ skb->sk = NULL;
+ kfree_skb(skb);
+ sk->sk_ack_backlog--;
+
+out_release:
+ release_sock(sk);
+
+ return err;
+}
+
+static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer)
+{
+ struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ int n;
+
+ memset(srose, 0, sizeof(*srose));
+ if (peer != 0) {
+ if (sk->sk_state != TCP_ESTABLISHED)
+ return -ENOTCONN;
+ srose->srose_family = AF_ROSE;
+ srose->srose_addr = rose->dest_addr;
+ srose->srose_call = rose->dest_call;
+ srose->srose_ndigis = rose->dest_ndigis;
+ for (n = 0; n < rose->dest_ndigis; n++)
+ srose->srose_digis[n] = rose->dest_digis[n];
+ } else {
+ srose->srose_family = AF_ROSE;
+ srose->srose_addr = rose->source_addr;
+ srose->srose_call = rose->source_call;
+ srose->srose_ndigis = rose->source_ndigis;
+ for (n = 0; n < rose->source_ndigis; n++)
+ srose->srose_digis[n] = rose->source_digis[n];
+ }
+
+ *uaddr_len = sizeof(struct full_sockaddr_rose);
+ return 0;
+}
+
+int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
+{
+ struct sock *sk;
+ struct sock *make;
+ struct rose_sock *make_rose;
+ struct rose_facilities_struct facilities;
+ int n;
+
+ skb->sk = NULL; /* Initially we don't know who it's for */
+
+ /*
+ * skb->data points to the rose frame start
+ */
+ memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
+
+ if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
+ skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
+ &facilities)) {
+ rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
+ return 0;
+ }
+
+ sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
+
+ /*
+ * We can't accept the Call Request.
+ */
+ if (sk == NULL || sk_acceptq_is_full(sk) ||
+ (make = rose_make_new(sk)) == NULL) {
+ rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
+ return 0;
+ }
+
+ skb->sk = make;
+ make->sk_state = TCP_ESTABLISHED;
+ make_rose = rose_sk(make);
+
+ make_rose->lci = lci;
+ make_rose->dest_addr = facilities.dest_addr;
+ make_rose->dest_call = facilities.dest_call;
+ make_rose->dest_ndigis = facilities.dest_ndigis;
+ for (n = 0 ; n < facilities.dest_ndigis ; n++)
+ make_rose->dest_digis[n] = facilities.dest_digis[n];
+ make_rose->source_addr = facilities.source_addr;
+ make_rose->source_call = facilities.source_call;
+ make_rose->source_ndigis = facilities.source_ndigis;
+ for (n = 0 ; n < facilities.source_ndigis ; n++)
+ make_rose->source_digis[n] = facilities.source_digis[n];
+ make_rose->neighbour = neigh;
+ make_rose->device = dev;
+ make_rose->facilities = facilities;
+
+ make_rose->neighbour->use++;
+
+ if (rose_sk(sk)->defer) {
+ make_rose->state = ROSE_STATE_5;
+ } else {
+ rose_write_internal(make, ROSE_CALL_ACCEPTED);
+ make_rose->state = ROSE_STATE_3;
+ rose_start_idletimer(make);
+ }
+
+ make_rose->condition = 0x00;
+ make_rose->vs = 0;
+ make_rose->va = 0;
+ make_rose->vr = 0;
+ make_rose->vl = 0;
+ sk->sk_ack_backlog++;
+
+ rose_insert_socket(make);
+
+ skb_queue_head(&sk->sk_receive_queue, skb);
+
+ rose_start_heartbeat(make);
+
+ if (!sock_flag(sk, SOCK_DEAD))
+ sk->sk_data_ready(sk);
+
+ return 1;
+}
+
+static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
+ int err;
+ struct full_sockaddr_rose srose;
+ struct sk_buff *skb;
+ unsigned char *asmptr;
+ int n, size, qbit = 0;
+
+ if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
+ return -EINVAL;
+
+ if (sock_flag(sk, SOCK_ZAPPED))
+ return -EADDRNOTAVAIL;
+
+ if (sk->sk_shutdown & SEND_SHUTDOWN) {
+ send_sig(SIGPIPE, current, 0);
+ return -EPIPE;
+ }
+
+ if (rose->neighbour == NULL || rose->device == NULL)
+ return -ENETUNREACH;
+
+ if (usrose != NULL) {
+ if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
+ return -EINVAL;
+ memset(&srose, 0, sizeof(struct full_sockaddr_rose));
+ memcpy(&srose, usrose, msg->msg_namelen);
+ if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
+ ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
+ return -EISCONN;
+ if (srose.srose_ndigis != rose->dest_ndigis)
+ return -EISCONN;
+ if (srose.srose_ndigis == rose->dest_ndigis) {
+ for (n = 0 ; n < srose.srose_ndigis ; n++)
+ if (ax25cmp(&rose->dest_digis[n],
+ &srose.srose_digis[n]))
+ return -EISCONN;
+ }
+ if (srose.srose_family != AF_ROSE)
+ return -EINVAL;
+ } else {
+ if (sk->sk_state != TCP_ESTABLISHED)
+ return -ENOTCONN;
+
+ srose.srose_family = AF_ROSE;
+ srose.srose_addr = rose->dest_addr;
+ srose.srose_call = rose->dest_call;
+ srose.srose_ndigis = rose->dest_ndigis;
+ for (n = 0 ; n < rose->dest_ndigis ; n++)
+ srose.srose_digis[n] = rose->dest_digis[n];
+ }
+
+ /* Build a packet */
+ /* Sanity check the packet size */
+ if (len > 65535)
+ return -EMSGSIZE;
+
+ size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
+
+ if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
+ return err;
+
+ skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
+
+ /*
+ * Put the data on the end
+ */
+
+ skb_reset_transport_header(skb);
+ skb_put(skb, len);
+
+ err = memcpy_from_msg(skb_transport_header(skb), msg, len);
+ if (err) {
+ kfree_skb(skb);
+ return err;
+ }
+
+ /*
+ * If the Q BIT Include socket option is in force, the first
+ * byte of the user data is the logical value of the Q Bit.
+ */
+ if (rose->qbitincl) {
+ qbit = skb->data[0];
+ skb_pull(skb, 1);
+ }
+
+ /*
+ * Push down the ROSE header
+ */
+ asmptr = skb_push(skb, ROSE_MIN_LEN);
+
+ /* Build a ROSE Network header */
+ asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
+ asmptr[1] = (rose->lci >> 0) & 0xFF;
+ asmptr[2] = ROSE_DATA;
+
+ if (qbit)
+ asmptr[0] |= ROSE_Q_BIT;
+
+ if (sk->sk_state != TCP_ESTABLISHED) {
+ kfree_skb(skb);
+ return -ENOTCONN;
+ }
+
+#ifdef M_BIT
+#define ROSE_PACLEN (256-ROSE_MIN_LEN)
+ if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
+ unsigned char header[ROSE_MIN_LEN];
+ struct sk_buff *skbn;
+ int frontlen;
+ int lg;
+
+ /* Save a copy of the Header */
+ skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
+ skb_pull(skb, ROSE_MIN_LEN);
+
+ frontlen = skb_headroom(skb);
+
+ while (skb->len > 0) {
+ if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
+ kfree_skb(skb);
+ return err;
+ }
+
+ skbn->sk = sk;
+ skbn->free = 1;
+ skbn->arp = 1;
+
+ skb_reserve(skbn, frontlen);
+
+ lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
+
+ /* Copy the user data */
+ skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
+ skb_pull(skb, lg);
+
+ /* Duplicate the Header */
+ skb_push(skbn, ROSE_MIN_LEN);
+ skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
+
+ if (skb->len > 0)
+ skbn->data[2] |= M_BIT;
+
+ skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
+ }
+
+ skb->free = 1;
+ kfree_skb(skb);
+ } else {
+ skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
+ }
+#else
+ skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
+#endif
+
+ rose_kick(sk);
+
+ return len;
+}
+
+
+static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+ int flags)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ size_t copied;
+ unsigned char *asmptr;
+ struct sk_buff *skb;
+ int n, er, qbit;
+
+ /*
+ * This works for seqpacket too. The receiver has ordered the queue for
+ * us! We do one quick check first though
+ */
+ if (sk->sk_state != TCP_ESTABLISHED)
+ return -ENOTCONN;
+
+ /* Now we can treat all alike */
+ if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
+ return er;
+
+ qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
+
+ skb_pull(skb, ROSE_MIN_LEN);
+
+ if (rose->qbitincl) {
+ asmptr = skb_push(skb, 1);
+ *asmptr = qbit;
+ }
+
+ skb_reset_transport_header(skb);
+ copied = skb->len;
+
+ if (copied > size) {
+ copied = size;
+ msg->msg_flags |= MSG_TRUNC;
+ }
+
+ skb_copy_datagram_msg(skb, 0, msg, copied);
+
+ if (msg->msg_name) {
+ struct sockaddr_rose *srose;
+ DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
+ msg->msg_name);
+
+ memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
+ srose = msg->msg_name;
+ srose->srose_family = AF_ROSE;
+ srose->srose_addr = rose->dest_addr;
+ srose->srose_call = rose->dest_call;
+ srose->srose_ndigis = rose->dest_ndigis;
+ for (n = 0 ; n < rose->dest_ndigis ; n++)
+ full_srose->srose_digis[n] = rose->dest_digis[n];
+ msg->msg_namelen = sizeof(struct full_sockaddr_rose);
+ }
+
+ skb_free_datagram(sk, skb);
+
+ return copied;
+}
+
+
+static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct sock *sk = sock->sk;
+ struct rose_sock *rose = rose_sk(sk);
+ void __user *argp = (void __user *)arg;
+
+ switch (cmd) {
+ case TIOCOUTQ: {
+ long amount;
+
+ amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
+ if (amount < 0)
+ amount = 0;
+ return put_user(amount, (unsigned int __user *) argp);
+ }
+
+ 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;
+ return put_user(amount, (unsigned int __user *) argp);
+ }
+
+ case SIOCGSTAMP:
+ return sock_get_timestamp(sk, (struct timeval __user *) argp);
+
+ case SIOCGSTAMPNS:
+ return sock_get_timestampns(sk, (struct timespec __user *) argp);
+
+ case SIOCGIFADDR:
+ case SIOCSIFADDR:
+ case SIOCGIFDSTADDR:
+ case SIOCSIFDSTADDR:
+ case SIOCGIFBRDADDR:
+ case SIOCSIFBRDADDR:
+ case SIOCGIFNETMASK:
+ case SIOCSIFNETMASK:
+ case SIOCGIFMETRIC:
+ case SIOCSIFMETRIC:
+ return -EINVAL;
+
+ case SIOCADDRT:
+ case SIOCDELRT:
+ case SIOCRSCLRRT:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ return rose_rt_ioctl(cmd, argp);
+
+ case SIOCRSGCAUSE: {
+ struct rose_cause_struct rose_cause;
+ rose_cause.cause = rose->cause;
+ rose_cause.diagnostic = rose->diagnostic;
+ return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
+ }
+
+ case SIOCRSSCAUSE: {
+ struct rose_cause_struct rose_cause;
+ if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
+ return -EFAULT;
+ rose->cause = rose_cause.cause;
+ rose->diagnostic = rose_cause.diagnostic;
+ return 0;
+ }
+
+ case SIOCRSSL2CALL:
+ if (!capable(CAP_NET_ADMIN)) return -EPERM;
+ if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
+ ax25_listen_release(&rose_callsign, NULL);
+ if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
+ return -EFAULT;
+ if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
+ return ax25_listen_register(&rose_callsign, NULL);
+
+ return 0;
+
+ case SIOCRSGL2CALL:
+ return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
+
+ case SIOCRSACCEPT:
+ if (rose->state == ROSE_STATE_5) {
+ rose_write_internal(sk, ROSE_CALL_ACCEPTED);
+ rose_start_idletimer(sk);
+ rose->condition = 0x00;
+ rose->vs = 0;
+ rose->va = 0;
+ rose->vr = 0;
+ rose->vl = 0;
+ rose->state = ROSE_STATE_3;
+ }
+ return 0;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PROC_FS
+static void *rose_info_start(struct seq_file *seq, loff_t *pos)
+ __acquires(rose_list_lock)
+{
+ spin_lock_bh(&rose_list_lock);
+ return seq_hlist_start_head(&rose_list, *pos);
+}
+
+static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return seq_hlist_next(v, &rose_list, pos);
+}
+
+static void rose_info_stop(struct seq_file *seq, void *v)
+ __releases(rose_list_lock)
+{
+ spin_unlock_bh(&rose_list_lock);
+}
+
+static int rose_info_show(struct seq_file *seq, void *v)
+{
+ char buf[11], rsbuf[11];
+
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq,
+ "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
+
+ else {
+ struct sock *s = sk_entry(v);
+ struct rose_sock *rose = rose_sk(s);
+ const char *devname, *callsign;
+ const struct net_device *dev = rose->device;
+
+ if (!dev)
+ devname = "???";
+ else
+ devname = dev->name;
+
+ seq_printf(seq, "%-10s %-9s ",
+ rose2asc(rsbuf, &rose->dest_addr),
+ ax2asc(buf, &rose->dest_call));
+
+ if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
+ callsign = "??????-?";
+ else
+ callsign = ax2asc(buf, &rose->source_call);
+
+ seq_printf(seq,
+ "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
+ rose2asc(rsbuf, &rose->source_addr),
+ callsign,
+ devname,
+ rose->lci & 0x0FFF,
+ (rose->neighbour) ? rose->neighbour->number : 0,
+ rose->state,
+ rose->vs,
+ rose->vr,
+ rose->va,
+ ax25_display_timer(&rose->timer) / HZ,
+ rose->t1 / HZ,
+ rose->t2 / HZ,
+ rose->t3 / HZ,
+ rose->hb / HZ,
+ ax25_display_timer(&rose->idletimer) / (60 * HZ),
+ rose->idle / (60 * HZ),
+ sk_wmem_alloc_get(s),
+ sk_rmem_alloc_get(s),
+ s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
+ }
+
+ return 0;
+}
+
+static const struct seq_operations rose_info_seqops = {
+ .start = rose_info_start,
+ .next = rose_info_next,
+ .stop = rose_info_stop,
+ .show = rose_info_show,
+};
+
+static int rose_info_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &rose_info_seqops);
+}
+
+static const struct file_operations rose_info_fops = {
+ .owner = THIS_MODULE,
+ .open = rose_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+#endif /* CONFIG_PROC_FS */
+
+static const struct net_proto_family rose_family_ops = {
+ .family = PF_ROSE,
+ .create = rose_create,
+ .owner = THIS_MODULE,
+};
+
+static const struct proto_ops rose_proto_ops = {
+ .family = PF_ROSE,
+ .owner = THIS_MODULE,
+ .release = rose_release,
+ .bind = rose_bind,
+ .connect = rose_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = rose_accept,
+ .getname = rose_getname,
+ .poll = datagram_poll,
+ .ioctl = rose_ioctl,
+ .listen = rose_listen,
+ .shutdown = sock_no_shutdown,
+ .setsockopt = rose_setsockopt,
+ .getsockopt = rose_getsockopt,
+ .sendmsg = rose_sendmsg,
+ .recvmsg = rose_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
+static struct notifier_block rose_dev_notifier = {
+ .notifier_call = rose_device_event,
+};
+
+static struct net_device **dev_rose;
+
+static struct ax25_protocol rose_pid = {
+ .pid = AX25_P_ROSE,
+ .func = rose_route_frame
+};
+
+static struct ax25_linkfail rose_linkfail_notifier = {
+ .func = rose_link_failed
+};
+
+static int __init rose_proto_init(void)
+{
+ int i;
+ int rc;
+
+ if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
+ printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
+ rc = -EINVAL;
+ goto out;
+ }
+
+ rc = proto_register(&rose_proto, 0);
+ if (rc != 0)
+ goto out;
+
+ rose_callsign = null_ax25_address;
+
+ dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
+ if (dev_rose == NULL) {
+ printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
+ rc = -ENOMEM;
+ goto out_proto_unregister;
+ }
+
+ for (i = 0; i < rose_ndevs; i++) {
+ struct net_device *dev;
+ char name[IFNAMSIZ];
+
+ sprintf(name, "rose%d", i);
+ dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
+ if (!dev) {
+ printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
+ rc = -ENOMEM;
+ goto fail;
+ }
+ rc = register_netdev(dev);
+ if (rc) {
+ printk(KERN_ERR "ROSE: netdevice registration failed\n");
+ free_netdev(dev);
+ goto fail;
+ }
+ rose_set_lockdep_key(dev);
+ dev_rose[i] = dev;
+ }
+
+ sock_register(&rose_family_ops);
+ register_netdevice_notifier(&rose_dev_notifier);
+
+ ax25_register_pid(&rose_pid);
+ ax25_linkfail_register(&rose_linkfail_notifier);
+
+#ifdef CONFIG_SYSCTL
+ rose_register_sysctl();
+#endif
+ rose_loopback_init();
+
+ rose_add_loopback_neigh();
+
+ proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
+ proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
+ &rose_neigh_fops);
+ proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
+ &rose_nodes_fops);
+ proc_create("rose_routes", S_IRUGO, init_net.proc_net,
+ &rose_routes_fops);
+out:
+ return rc;
+fail:
+ while (--i >= 0) {
+ unregister_netdev(dev_rose[i]);
+ free_netdev(dev_rose[i]);
+ }
+ kfree(dev_rose);
+out_proto_unregister:
+ proto_unregister(&rose_proto);
+ goto out;
+}
+module_init(rose_proto_init);
+
+module_param(rose_ndevs, int, 0);
+MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
+
+MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
+MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_ROSE);
+
+static void __exit rose_exit(void)
+{
+ int i;
+
+ remove_proc_entry("rose", init_net.proc_net);
+ remove_proc_entry("rose_neigh", init_net.proc_net);
+ remove_proc_entry("rose_nodes", init_net.proc_net);
+ remove_proc_entry("rose_routes", init_net.proc_net);
+ rose_loopback_clear();
+
+ rose_rt_free();
+
+ ax25_protocol_release(AX25_P_ROSE);
+ ax25_linkfail_release(&rose_linkfail_notifier);
+
+ if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
+ ax25_listen_release(&rose_callsign, NULL);
+
+#ifdef CONFIG_SYSCTL
+ rose_unregister_sysctl();
+#endif
+ unregister_netdevice_notifier(&rose_dev_notifier);
+
+ sock_unregister(PF_ROSE);
+
+ for (i = 0; i < rose_ndevs; i++) {
+ struct net_device *dev = dev_rose[i];
+
+ if (dev) {
+ unregister_netdev(dev);
+ free_netdev(dev);
+ }
+ }
+
+ kfree(dev_rose);
+ proto_unregister(&rose_proto);
+}
+
+module_exit(rose_exit);
diff --git a/net/rose/rose_dev.c b/net/rose/rose_dev.c
new file mode 100644
index 000000000..369ca81a8
--- /dev/null
+++ b/net/rose/rose_dev.c
@@ -0,0 +1,144 @@
+/*
+ * 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)
+ */
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/sysctl.h>
+#include <linux/string.h>
+#include <linux/socket.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/if_ether.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+
+#include <net/ip.h>
+#include <net/arp.h>
+
+#include <net/ax25.h>
+#include <net/rose.h>
+
+static int rose_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type,
+ const void *daddr, const void *saddr, unsigned int len)
+{
+ unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
+
+ if (daddr)
+ memcpy(buff + 7, daddr, dev->addr_len);
+
+ *buff++ = ROSE_GFI | ROSE_Q_BIT;
+ *buff++ = 0x00;
+ *buff++ = ROSE_DATA;
+ *buff++ = 0x7F;
+ *buff++ = AX25_P_IP;
+
+ if (daddr != NULL)
+ return 37;
+
+ return -37;
+}
+
+static int rose_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sockaddr *sa = addr;
+ int err;
+
+ if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
+ return 0;
+
+ if (dev->flags & IFF_UP) {
+ err = rose_add_loopback_node((rose_address *)sa->sa_data);
+ if (err)
+ return err;
+
+ rose_del_loopback_node((rose_address *)dev->dev_addr);
+ }
+
+ memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
+
+ return 0;
+}
+
+static int rose_open(struct net_device *dev)
+{
+ int err;
+
+ err = rose_add_loopback_node((rose_address *)dev->dev_addr);
+ if (err)
+ return err;
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+static int rose_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ rose_del_loopback_node((rose_address *)dev->dev_addr);
+ return 0;
+}
+
+static netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct net_device_stats *stats = &dev->stats;
+ unsigned int len = skb->len;
+
+ if (!netif_running(dev)) {
+ printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
+ return NETDEV_TX_BUSY;
+ }
+
+ if (!rose_route_frame(skb, NULL)) {
+ dev_kfree_skb(skb);
+ stats->tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ stats->tx_packets++;
+ stats->tx_bytes += len;
+ return NETDEV_TX_OK;
+}
+
+static const struct header_ops rose_header_ops = {
+ .create = rose_header,
+};
+
+static const struct net_device_ops rose_netdev_ops = {
+ .ndo_open = rose_open,
+ .ndo_stop = rose_close,
+ .ndo_start_xmit = rose_xmit,
+ .ndo_set_mac_address = rose_set_mac_address,
+};
+
+void rose_setup(struct net_device *dev)
+{
+ dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
+ dev->netdev_ops = &rose_netdev_ops;
+
+ dev->header_ops = &rose_header_ops;
+ dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
+ dev->addr_len = ROSE_ADDR_LEN;
+ dev->type = ARPHRD_ROSE;
+
+ /* New-style flags. */
+ dev->flags = IFF_NOARP;
+}
diff --git a/net/rose/rose_in.c b/net/rose/rose_in.c
new file mode 100644
index 000000000..79c4abcfa
--- /dev/null
+++ b/net/rose/rose_in.c
@@ -0,0 +1,294 @@
+/*
+ * 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)
+ *
+ * Most of this code is based on the SDL diagrams published in the 7th ARRL
+ * Computer Networking Conference papers. The diagrams have mistakes in them,
+ * but are mostly correct. Before you modify the code could you read the SDL
+ * diagrams as the code is not obvious and probably very easy to break.
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.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 <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <net/rose.h>
+
+/*
+ * State machine for state 1, Awaiting Call Accepted State.
+ * The handling of the timer(s) is in file rose_timer.c.
+ * Handling of state 0 and connection release is in af_rose.c.
+ */
+static int rose_state1_machine(struct sock *sk, struct sk_buff *skb, int frametype)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ switch (frametype) {
+ case ROSE_CALL_ACCEPTED:
+ rose_stop_timer(sk);
+ rose_start_idletimer(sk);
+ rose->condition = 0x00;
+ rose->vs = 0;
+ rose->va = 0;
+ rose->vr = 0;
+ rose->vl = 0;
+ rose->state = ROSE_STATE_3;
+ sk->sk_state = TCP_ESTABLISHED;
+ if (!sock_flag(sk, SOCK_DEAD))
+ sk->sk_state_change(sk);
+ break;
+
+ case ROSE_CLEAR_REQUEST:
+ rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
+ rose_disconnect(sk, ECONNREFUSED, skb->data[3], skb->data[4]);
+ rose->neighbour->use--;
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * State machine for state 2, Awaiting Clear Confirmation State.
+ * The handling of the timer(s) is in file rose_timer.c
+ * Handling of state 0 and connection release is in af_rose.c.
+ */
+static int rose_state2_machine(struct sock *sk, struct sk_buff *skb, int frametype)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ switch (frametype) {
+ case ROSE_CLEAR_REQUEST:
+ rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
+ rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
+ rose->neighbour->use--;
+ break;
+
+ case ROSE_CLEAR_CONFIRMATION:
+ rose_disconnect(sk, 0, -1, -1);
+ rose->neighbour->use--;
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * State machine for state 3, Connected State.
+ * The handling of the timer(s) is in file rose_timer.c
+ * Handling of state 0 and connection release is in af_rose.c.
+ */
+static int rose_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype, int ns, int nr, int q, int d, int m)
+{
+ struct rose_sock *rose = rose_sk(sk);
+ int queued = 0;
+
+ switch (frametype) {
+ case ROSE_RESET_REQUEST:
+ rose_stop_timer(sk);
+ rose_start_idletimer(sk);
+ rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
+ rose->condition = 0x00;
+ rose->vs = 0;
+ rose->vr = 0;
+ rose->va = 0;
+ rose->vl = 0;
+ rose_requeue_frames(sk);
+ break;
+
+ case ROSE_CLEAR_REQUEST:
+ rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
+ rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
+ rose->neighbour->use--;
+ break;
+
+ case ROSE_RR:
+ case ROSE_RNR:
+ if (!rose_validate_nr(sk, nr)) {
+ rose_write_internal(sk, ROSE_RESET_REQUEST);
+ rose->condition = 0x00;
+ rose->vs = 0;
+ rose->vr = 0;
+ rose->va = 0;
+ rose->vl = 0;
+ rose->state = ROSE_STATE_4;
+ rose_start_t2timer(sk);
+ rose_stop_idletimer(sk);
+ } else {
+ rose_frames_acked(sk, nr);
+ if (frametype == ROSE_RNR) {
+ rose->condition |= ROSE_COND_PEER_RX_BUSY;
+ } else {
+ rose->condition &= ~ROSE_COND_PEER_RX_BUSY;
+ }
+ }
+ break;
+
+ case ROSE_DATA: /* XXX */
+ rose->condition &= ~ROSE_COND_PEER_RX_BUSY;
+ if (!rose_validate_nr(sk, nr)) {
+ rose_write_internal(sk, ROSE_RESET_REQUEST);
+ rose->condition = 0x00;
+ rose->vs = 0;
+ rose->vr = 0;
+ rose->va = 0;
+ rose->vl = 0;
+ rose->state = ROSE_STATE_4;
+ rose_start_t2timer(sk);
+ rose_stop_idletimer(sk);
+ break;
+ }
+ rose_frames_acked(sk, nr);
+ if (ns == rose->vr) {
+ rose_start_idletimer(sk);
+ if (sock_queue_rcv_skb(sk, skb) == 0) {
+ rose->vr = (rose->vr + 1) % ROSE_MODULUS;
+ queued = 1;
+ } else {
+ /* Should never happen ! */
+ rose_write_internal(sk, ROSE_RESET_REQUEST);
+ rose->condition = 0x00;
+ rose->vs = 0;
+ rose->vr = 0;
+ rose->va = 0;
+ rose->vl = 0;
+ rose->state = ROSE_STATE_4;
+ rose_start_t2timer(sk);
+ rose_stop_idletimer(sk);
+ break;
+ }
+ if (atomic_read(&sk->sk_rmem_alloc) >
+ (sk->sk_rcvbuf >> 1))
+ rose->condition |= ROSE_COND_OWN_RX_BUSY;
+ }
+ /*
+ * If the window is full, ack the frame, else start the
+ * acknowledge hold back timer.
+ */
+ if (((rose->vl + sysctl_rose_window_size) % ROSE_MODULUS) == rose->vr) {
+ rose->condition &= ~ROSE_COND_ACK_PENDING;
+ rose_stop_timer(sk);
+ rose_enquiry_response(sk);
+ } else {
+ rose->condition |= ROSE_COND_ACK_PENDING;
+ rose_start_hbtimer(sk);
+ }
+ break;
+
+ default:
+ printk(KERN_WARNING "ROSE: unknown %02X in state 3\n", frametype);
+ break;
+ }
+
+ return queued;
+}
+
+/*
+ * State machine for state 4, Awaiting Reset Confirmation State.
+ * The handling of the timer(s) is in file rose_timer.c
+ * Handling of state 0 and connection release is in af_rose.c.
+ */
+static int rose_state4_machine(struct sock *sk, struct sk_buff *skb, int frametype)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ switch (frametype) {
+ case ROSE_RESET_REQUEST:
+ rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
+ case ROSE_RESET_CONFIRMATION:
+ rose_stop_timer(sk);
+ rose_start_idletimer(sk);
+ rose->condition = 0x00;
+ rose->va = 0;
+ rose->vr = 0;
+ rose->vs = 0;
+ rose->vl = 0;
+ rose->state = ROSE_STATE_3;
+ rose_requeue_frames(sk);
+ break;
+
+ case ROSE_CLEAR_REQUEST:
+ rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
+ rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
+ rose->neighbour->use--;
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * State machine for state 5, Awaiting Call Acceptance State.
+ * The handling of the timer(s) is in file rose_timer.c
+ * Handling of state 0 and connection release is in af_rose.c.
+ */
+static int rose_state5_machine(struct sock *sk, struct sk_buff *skb, int frametype)
+{
+ if (frametype == ROSE_CLEAR_REQUEST) {
+ rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
+ rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
+ rose_sk(sk)->neighbour->use--;
+ }
+
+ return 0;
+}
+
+/* Higher level upcall for a LAPB frame */
+int rose_process_rx_frame(struct sock *sk, struct sk_buff *skb)
+{
+ struct rose_sock *rose = rose_sk(sk);
+ int queued = 0, frametype, ns, nr, q, d, m;
+
+ if (rose->state == ROSE_STATE_0)
+ return 0;
+
+ frametype = rose_decode(skb, &ns, &nr, &q, &d, &m);
+
+ switch (rose->state) {
+ case ROSE_STATE_1:
+ queued = rose_state1_machine(sk, skb, frametype);
+ break;
+ case ROSE_STATE_2:
+ queued = rose_state2_machine(sk, skb, frametype);
+ break;
+ case ROSE_STATE_3:
+ queued = rose_state3_machine(sk, skb, frametype, ns, nr, q, d, m);
+ break;
+ case ROSE_STATE_4:
+ queued = rose_state4_machine(sk, skb, frametype);
+ break;
+ case ROSE_STATE_5:
+ queued = rose_state5_machine(sk, skb, frametype);
+ break;
+ }
+
+ rose_kick(sk);
+
+ return queued;
+}
diff --git a/net/rose/rose_link.c b/net/rose/rose_link.c
new file mode 100644
index 000000000..e873d7d9f
--- /dev/null
+++ b/net/rose/rose_link.c
@@ -0,0 +1,292 @@
+/*
+ * 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)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/slab.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/netfilter.h>
+#include <net/rose.h>
+
+static void rose_ftimer_expiry(unsigned long);
+static void rose_t0timer_expiry(unsigned long);
+
+static void rose_transmit_restart_confirmation(struct rose_neigh *neigh);
+static void rose_transmit_restart_request(struct rose_neigh *neigh);
+
+void rose_start_ftimer(struct rose_neigh *neigh)
+{
+ del_timer(&neigh->ftimer);
+
+ neigh->ftimer.data = (unsigned long)neigh;
+ neigh->ftimer.function = &rose_ftimer_expiry;
+ neigh->ftimer.expires =
+ jiffies + msecs_to_jiffies(sysctl_rose_link_fail_timeout);
+
+ add_timer(&neigh->ftimer);
+}
+
+static void rose_start_t0timer(struct rose_neigh *neigh)
+{
+ del_timer(&neigh->t0timer);
+
+ neigh->t0timer.data = (unsigned long)neigh;
+ neigh->t0timer.function = &rose_t0timer_expiry;
+ neigh->t0timer.expires =
+ jiffies + msecs_to_jiffies(sysctl_rose_restart_request_timeout);
+
+ add_timer(&neigh->t0timer);
+}
+
+void rose_stop_ftimer(struct rose_neigh *neigh)
+{
+ del_timer(&neigh->ftimer);
+}
+
+void rose_stop_t0timer(struct rose_neigh *neigh)
+{
+ del_timer(&neigh->t0timer);
+}
+
+int rose_ftimer_running(struct rose_neigh *neigh)
+{
+ return timer_pending(&neigh->ftimer);
+}
+
+static int rose_t0timer_running(struct rose_neigh *neigh)
+{
+ return timer_pending(&neigh->t0timer);
+}
+
+static void rose_ftimer_expiry(unsigned long param)
+{
+}
+
+static void rose_t0timer_expiry(unsigned long param)
+{
+ struct rose_neigh *neigh = (struct rose_neigh *)param;
+
+ rose_transmit_restart_request(neigh);
+
+ neigh->dce_mode = 0;
+
+ rose_start_t0timer(neigh);
+}
+
+/*
+ * Interface to ax25_send_frame. Changes my level 2 callsign depending
+ * on whether we have a global ROSE callsign or use the default port
+ * callsign.
+ */
+static int rose_send_frame(struct sk_buff *skb, struct rose_neigh *neigh)
+{
+ ax25_address *rose_call;
+ ax25_cb *ax25s;
+
+ if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
+ rose_call = (ax25_address *)neigh->dev->dev_addr;
+ else
+ rose_call = &rose_callsign;
+
+ ax25s = neigh->ax25;
+ neigh->ax25 = ax25_send_frame(skb, 260, rose_call, &neigh->callsign, neigh->digipeat, neigh->dev);
+ if (ax25s)
+ ax25_cb_put(ax25s);
+
+ return neigh->ax25 != NULL;
+}
+
+/*
+ * Interface to ax25_link_up. Changes my level 2 callsign depending
+ * on whether we have a global ROSE callsign or use the default port
+ * callsign.
+ */
+static int rose_link_up(struct rose_neigh *neigh)
+{
+ ax25_address *rose_call;
+ ax25_cb *ax25s;
+
+ if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
+ rose_call = (ax25_address *)neigh->dev->dev_addr;
+ else
+ rose_call = &rose_callsign;
+
+ ax25s = neigh->ax25;
+ neigh->ax25 = ax25_find_cb(rose_call, &neigh->callsign, neigh->digipeat, neigh->dev);
+ if (ax25s)
+ ax25_cb_put(ax25s);
+
+ return neigh->ax25 != NULL;
+}
+
+/*
+ * This handles all restart and diagnostic frames.
+ */
+void rose_link_rx_restart(struct sk_buff *skb, struct rose_neigh *neigh, unsigned short frametype)
+{
+ struct sk_buff *skbn;
+
+ switch (frametype) {
+ case ROSE_RESTART_REQUEST:
+ rose_stop_t0timer(neigh);
+ neigh->restarted = 1;
+ neigh->dce_mode = (skb->data[3] == ROSE_DTE_ORIGINATED);
+ rose_transmit_restart_confirmation(neigh);
+ break;
+
+ case ROSE_RESTART_CONFIRMATION:
+ rose_stop_t0timer(neigh);
+ neigh->restarted = 1;
+ break;
+
+ case ROSE_DIAGNOSTIC:
+ pr_warn("ROSE: received diagnostic #%d - %3ph\n", skb->data[3],
+ skb->data + 4);
+ break;
+
+ default:
+ printk(KERN_WARNING "ROSE: received unknown %02X with LCI 000\n", frametype);
+ break;
+ }
+
+ if (neigh->restarted) {
+ while ((skbn = skb_dequeue(&neigh->queue)) != NULL)
+ if (!rose_send_frame(skbn, neigh))
+ kfree_skb(skbn);
+ }
+}
+
+/*
+ * This routine is called when a Restart Request is needed
+ */
+static void rose_transmit_restart_request(struct rose_neigh *neigh)
+{
+ struct sk_buff *skb;
+ unsigned char *dptr;
+ int len;
+
+ len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 3;
+
+ if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
+ return;
+
+ skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
+
+ dptr = skb_put(skb, ROSE_MIN_LEN + 3);
+
+ *dptr++ = AX25_P_ROSE;
+ *dptr++ = ROSE_GFI;
+ *dptr++ = 0x00;
+ *dptr++ = ROSE_RESTART_REQUEST;
+ *dptr++ = ROSE_DTE_ORIGINATED;
+ *dptr++ = 0;
+
+ if (!rose_send_frame(skb, neigh))
+ kfree_skb(skb);
+}
+
+/*
+ * This routine is called when a Restart Confirmation is needed
+ */
+static void rose_transmit_restart_confirmation(struct rose_neigh *neigh)
+{
+ struct sk_buff *skb;
+ unsigned char *dptr;
+ int len;
+
+ len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 1;
+
+ if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
+ return;
+
+ skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
+
+ dptr = skb_put(skb, ROSE_MIN_LEN + 1);
+
+ *dptr++ = AX25_P_ROSE;
+ *dptr++ = ROSE_GFI;
+ *dptr++ = 0x00;
+ *dptr++ = ROSE_RESTART_CONFIRMATION;
+
+ if (!rose_send_frame(skb, neigh))
+ kfree_skb(skb);
+}
+
+/*
+ * This routine is called when a Clear Request is needed outside of the context
+ * of a connected socket.
+ */
+void rose_transmit_clear_request(struct rose_neigh *neigh, unsigned int lci, unsigned char cause, unsigned char diagnostic)
+{
+ struct sk_buff *skb;
+ unsigned char *dptr;
+ int len;
+
+ len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 3;
+
+ if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
+ return;
+
+ skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
+
+ dptr = skb_put(skb, ROSE_MIN_LEN + 3);
+
+ *dptr++ = AX25_P_ROSE;
+ *dptr++ = ((lci >> 8) & 0x0F) | ROSE_GFI;
+ *dptr++ = ((lci >> 0) & 0xFF);
+ *dptr++ = ROSE_CLEAR_REQUEST;
+ *dptr++ = cause;
+ *dptr++ = diagnostic;
+
+ if (!rose_send_frame(skb, neigh))
+ kfree_skb(skb);
+}
+
+void rose_transmit_link(struct sk_buff *skb, struct rose_neigh *neigh)
+{
+ unsigned char *dptr;
+
+ if (neigh->loopback) {
+ rose_loopback_queue(skb, neigh);
+ return;
+ }
+
+ if (!rose_link_up(neigh))
+ neigh->restarted = 0;
+
+ dptr = skb_push(skb, 1);
+ *dptr++ = AX25_P_ROSE;
+
+ if (neigh->restarted) {
+ if (!rose_send_frame(skb, neigh))
+ kfree_skb(skb);
+ } else {
+ skb_queue_tail(&neigh->queue, skb);
+
+ if (!rose_t0timer_running(neigh)) {
+ rose_transmit_restart_request(neigh);
+ neigh->dce_mode = 0;
+ rose_start_t0timer(neigh);
+ }
+ }
+}
diff --git a/net/rose/rose_loopback.c b/net/rose/rose_loopback.c
new file mode 100644
index 000000000..344456206
--- /dev/null
+++ b/net/rose/rose_loopback.c
@@ -0,0 +1,124 @@
+/*
+ * 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)
+ */
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/socket.h>
+#include <linux/timer.h>
+#include <net/ax25.h>
+#include <linux/skbuff.h>
+#include <net/rose.h>
+#include <linux/init.h>
+
+static struct sk_buff_head loopback_queue;
+static struct timer_list loopback_timer;
+
+static void rose_set_loopback_timer(void);
+
+void rose_loopback_init(void)
+{
+ skb_queue_head_init(&loopback_queue);
+
+ init_timer(&loopback_timer);
+}
+
+static int rose_loopback_running(void)
+{
+ return timer_pending(&loopback_timer);
+}
+
+int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh)
+{
+ struct sk_buff *skbn;
+
+ skbn = skb_clone(skb, GFP_ATOMIC);
+
+ kfree_skb(skb);
+
+ if (skbn != NULL) {
+ skb_queue_tail(&loopback_queue, skbn);
+
+ if (!rose_loopback_running())
+ rose_set_loopback_timer();
+ }
+
+ return 1;
+}
+
+static void rose_loopback_timer(unsigned long);
+
+static void rose_set_loopback_timer(void)
+{
+ del_timer(&loopback_timer);
+
+ loopback_timer.data = 0;
+ loopback_timer.function = &rose_loopback_timer;
+ loopback_timer.expires = jiffies + 10;
+
+ add_timer(&loopback_timer);
+}
+
+static void rose_loopback_timer(unsigned long param)
+{
+ struct sk_buff *skb;
+ struct net_device *dev;
+ rose_address *dest;
+ struct sock *sk;
+ unsigned short frametype;
+ unsigned int lci_i, lci_o;
+
+ while ((skb = skb_dequeue(&loopback_queue)) != NULL) {
+ if (skb->len < ROSE_MIN_LEN) {
+ kfree_skb(skb);
+ continue;
+ }
+ lci_i = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
+ frametype = skb->data[2];
+ if (frametype == ROSE_CALL_REQUEST &&
+ (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF ||
+ skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] !=
+ ROSE_CALL_REQ_ADDR_LEN_VAL)) {
+ kfree_skb(skb);
+ continue;
+ }
+ dest = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF);
+ lci_o = ROSE_DEFAULT_MAXVC + 1 - lci_i;
+
+ skb_reset_transport_header(skb);
+
+ sk = rose_find_socket(lci_o, rose_loopback_neigh);
+ if (sk) {
+ if (rose_process_rx_frame(sk, skb) == 0)
+ kfree_skb(skb);
+ continue;
+ }
+
+ if (frametype == ROSE_CALL_REQUEST) {
+ if ((dev = rose_dev_get(dest)) != NULL) {
+ if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0)
+ kfree_skb(skb);
+ } else {
+ kfree_skb(skb);
+ }
+ } else {
+ kfree_skb(skb);
+ }
+ }
+}
+
+void __exit rose_loopback_clear(void)
+{
+ struct sk_buff *skb;
+
+ del_timer(&loopback_timer);
+
+ while ((skb = skb_dequeue(&loopback_queue)) != NULL) {
+ skb->sk = NULL;
+ kfree_skb(skb);
+ }
+}
diff --git a/net/rose/rose_out.c b/net/rose/rose_out.c
new file mode 100644
index 000000000..9ad98b524
--- /dev/null
+++ b/net/rose/rose_out.c
@@ -0,0 +1,125 @@
+/*
+ * 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)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/gfp.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <net/rose.h>
+
+/*
+ * This procedure is passed a buffer descriptor for an iframe. It builds
+ * the rest of the control part of the frame and then writes it out.
+ */
+static void rose_send_iframe(struct sock *sk, struct sk_buff *skb)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ if (skb == NULL)
+ return;
+
+ skb->data[2] |= (rose->vr << 5) & 0xE0;
+ skb->data[2] |= (rose->vs << 1) & 0x0E;
+
+ rose_start_idletimer(sk);
+
+ rose_transmit_link(skb, rose->neighbour);
+}
+
+void rose_kick(struct sock *sk)
+{
+ struct rose_sock *rose = rose_sk(sk);
+ struct sk_buff *skb, *skbn;
+ unsigned short start, end;
+
+ if (rose->state != ROSE_STATE_3)
+ return;
+
+ if (rose->condition & ROSE_COND_PEER_RX_BUSY)
+ return;
+
+ if (!skb_peek(&sk->sk_write_queue))
+ return;
+
+ start = (skb_peek(&rose->ack_queue) == NULL) ? rose->va : rose->vs;
+ end = (rose->va + sysctl_rose_window_size) % ROSE_MODULUS;
+
+ if (start == end)
+ return;
+
+ rose->vs = start;
+
+ /*
+ * Transmit data until either we're out of data to send or
+ * the window is full.
+ */
+
+ skb = skb_dequeue(&sk->sk_write_queue);
+
+ do {
+ if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
+ skb_queue_head(&sk->sk_write_queue, skb);
+ break;
+ }
+
+ skb_set_owner_w(skbn, sk);
+
+ /*
+ * Transmit the frame copy.
+ */
+ rose_send_iframe(sk, skbn);
+
+ rose->vs = (rose->vs + 1) % ROSE_MODULUS;
+
+ /*
+ * Requeue the original data frame.
+ */
+ skb_queue_tail(&rose->ack_queue, skb);
+
+ } while (rose->vs != end &&
+ (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);
+
+ rose->vl = rose->vr;
+ rose->condition &= ~ROSE_COND_ACK_PENDING;
+
+ rose_stop_timer(sk);
+}
+
+/*
+ * The following routines are taken from page 170 of the 7th ARRL Computer
+ * Networking Conference paper, as is the whole state machine.
+ */
+
+void rose_enquiry_response(struct sock *sk)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ if (rose->condition & ROSE_COND_OWN_RX_BUSY)
+ rose_write_internal(sk, ROSE_RNR);
+ else
+ rose_write_internal(sk, ROSE_RR);
+
+ rose->vl = rose->vr;
+ rose->condition &= ~ROSE_COND_ACK_PENDING;
+
+ rose_stop_timer(sk);
+}
diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c
new file mode 100644
index 000000000..40148932c
--- /dev/null
+++ b/net/rose/rose_route.c
@@ -0,0 +1,1366 @@
+/*
+ * 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/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/slab.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_states.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>
+#include <linux/export.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;
+
+/*
+ * Add a new route to a node, and in the process add the node and the
+ * neighbour if it is new.
+ */
+static int __must_check 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) {
+ rose_neigh->digipeat =
+ kmalloc(sizeof(ax25_digi), GFP_ATOMIC);
+ if (rose_neigh->digipeat == 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);
+
+ if ((s = rose_neigh_list) == rose_neigh) {
+ rose_neigh_list = rose_neigh->next;
+ if (rose_neigh->ax25)
+ ax25_cb_put(rose_neigh->ax25);
+ kfree(rose_neigh->digipeat);
+ kfree(rose_neigh);
+ return;
+ }
+
+ while (s != NULL && s->next != NULL) {
+ if (s->next == rose_neigh) {
+ s->next = rose_neigh->next;
+ if (rose_neigh->ax25)
+ ax25_cb_put(rose_neigh->ax25);
+ kfree(rose_neigh->digipeat);
+ kfree(rose_neigh);
+ return;
+ }
+
+ s = s->next;
+ }
+}
+
+/*
+ * 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.
+ */
+void rose_add_loopback_neigh(void)
+{
+ struct rose_neigh *sn;
+
+ rose_loopback_neigh = kmalloc(sizeof(struct rose_neigh), GFP_KERNEL);
+ if (!rose_loopback_neigh)
+ return;
+ sn = rose_loopback_neigh;
+
+ sn->callsign = null_ax25_address;
+ sn->digipeat = NULL;
+ sn->ax25 = NULL;
+ sn->dev = NULL;
+ sn->count = 0;
+ sn->use = 0;
+ sn->dce_mode = 1;
+ sn->loopback = 1;
+ sn->number = rose_neigh_no++;
+ sn->restarted = 1;
+
+ skb_queue_head_init(&sn->queue);
+
+ init_timer(&sn->ftimer);
+ init_timer(&sn->t0timer);
+
+ spin_lock_bh(&rose_neigh_list_lock);
+ sn->next = rose_neigh_list;
+ rose_neigh_list = sn;
+ spin_unlock_bh(&rose_neigh_list_lock);
+}
+
+/*
+ * Add a loopback node.
+ */
+int rose_add_loopback_node(rose_address *address)
+{
+ struct rose_node *rose_node;
+ 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 err;
+}
+
+/*
+ * 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".
+ * called with RTNL
+ */
+static struct net_device *rose_ax25_dev_find(char *devname)
+{
+ struct net_device *dev;
+
+ if ((dev = __dev_get_by_name(&init_net, devname)) == NULL)
+ return NULL;
+
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
+ return dev;
+
+ return NULL;
+}
+
+/*
+ * Find the first active ROSE device, usually "rose0".
+ */
+struct net_device *rose_dev_first(void)
+{
+ struct net_device *dev, *first = NULL;
+
+ rcu_read_lock();
+ for_each_netdev_rcu(&init_net, dev) {
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE)
+ if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
+ first = dev;
+ }
+ rcu_read_unlock();
+
+ return first;
+}
+
+/*
+ * Find the ROSE device for the given address.
+ */
+struct net_device *rose_dev_get(rose_address *addr)
+{
+ struct net_device *dev;
+
+ rcu_read_lock();
+ for_each_netdev_rcu(&init_net, dev) {
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0) {
+ dev_hold(dev);
+ goto out;
+ }
+ }
+ dev = NULL;
+out:
+ rcu_read_unlock();
+ return dev;
+}
+
+static int rose_dev_exists(rose_address *addr)
+{
+ struct net_device *dev;
+
+ rcu_read_lock();
+ for_each_netdev_rcu(&init_net, dev) {
+ if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0)
+ goto out;
+ }
+ dev = NULL;
+out:
+ rcu_read_unlock();
+ 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 or a route given a ROSE address.
+ */
+struct rose_neigh *rose_get_neigh(rose_address *addr, unsigned char *cause,
+ unsigned char *diagnostic, int route_frame)
+{
+ struct rose_neigh *res = NULL;
+ struct rose_node *node;
+ int failed = 0;
+ int i;
+
+ if (!route_frame) 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 (node->neighbour[i]->restarted) {
+ res = node->neighbour[i];
+ goto out;
+ }
+ }
+ }
+ }
+ if (!route_frame) { /* connect request */
+ 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];
+ failed = 0;
+ goto out;
+ }
+ failed = 1;
+ }
+ }
+ }
+ }
+
+ if (failed) {
+ *cause = ROSE_OUT_OF_ORDER;
+ *diagnostic = 0;
+ } else {
+ *cause = ROSE_NOT_OBTAINABLE;
+ *diagnostic = 0;
+ }
+
+out:
+ if (!route_frame) 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_find(rose_route.device)) == NULL)
+ return -EINVAL;
+ if (rose_dev_exists(&rose_route.address)) /* Can't add routes to ourself */
+ return -EINVAL;
+ if (rose_route.mask > 10) /* Mask can't be more than 10 digits */
+ return -EINVAL;
+ if (rose_route.ndigis > AX25_MAX_DIGIS)
+ return -EINVAL;
+ err = rose_add_node(&rose_route, dev);
+ return err;
+
+ case SIOCDELRT:
+ if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
+ return -EFAULT;
+ if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
+ return -EINVAL;
+ err = rose_del_node(&rose_route, 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;
+ ax25_cb_put(ax25);
+
+ 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 res = 0;
+ char buf[11];
+
+ if (skb->len < ROSE_MIN_LEN)
+ return res;
+ frametype = skb->data[2];
+ lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
+ if (frametype == ROSE_CALL_REQUEST &&
+ (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF ||
+ skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] !=
+ ROSE_CALL_REQ_ADDR_LEN_VAL))
+ return res;
+ src_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_SRC_ADDR_OFF);
+ dest_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF);
+
+ 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(buf, &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_reset_transport_header(skb);
+ 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 */
+ res = 0;
+ goto out;
+ }
+
+ memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
+
+ if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
+ skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
+ &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, 1)) == 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);
+
+ return res;
+}
+
+#ifdef CONFIG_PROC_FS
+
+static void *rose_node_start(struct seq_file *seq, loff_t *pos)
+ __acquires(rose_node_list_lock)
+{
+ struct rose_node *rose_node;
+ int i = 1;
+
+ spin_lock_bh(&rose_node_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)
+ __releases(rose_node_list_lock)
+{
+ spin_unlock_bh(&rose_node_list_lock);
+}
+
+static int rose_node_show(struct seq_file *seq, void *v)
+{
+ char rsbuf[11];
+ 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(rsbuf, &rose_node->address),
+ rose_node->mask);
+ } else { */
+ seq_printf(seq, "%-10s %04d %d",
+ rose2asc(rsbuf, &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 const 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);
+}
+
+const 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)
+ __acquires(rose_neigh_list_lock)
+{
+ 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)
+ __releases(rose_neigh_list_lock)
+{
+ spin_unlock_bh(&rose_neigh_list_lock);
+}
+
+static int rose_neigh_show(struct seq_file *seq, void *v)
+{
+ char buf[11];
+ 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(buf, &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(buf, &rose_neigh->digipeat->calls[i]));
+ }
+
+ seq_puts(seq, "\n");
+ }
+ return 0;
+}
+
+
+static const 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);
+}
+
+const 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)
+ __acquires(rose_route_list_lock)
+{
+ 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)
+ __releases(rose_route_list_lock)
+{
+ spin_unlock_bh(&rose_route_list_lock);
+}
+
+static int rose_route_show(struct seq_file *seq, void *v)
+{
+ char buf[11], rsbuf[11];
+
+ 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(rsbuf, &rose_route->src_addr),
+ ax2asc(buf, &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(rsbuf, &rose_route->dest_addr),
+ ax2asc(buf, &rose_route->dest_call),
+ rose_route->neigh2->number);
+ else
+ seq_puts(seq,
+ "000 * * 00000\n");
+ }
+ return 0;
+}
+
+static const 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);
+}
+
+const 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);
+ }
+}
diff --git a/net/rose/rose_subr.c b/net/rose/rose_subr.c
new file mode 100644
index 000000000..7ca57741b
--- /dev/null
+++ b/net/rose/rose_subr.c
@@ -0,0 +1,556 @@
+/*
+ * 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)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/slab.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <net/rose.h>
+
+static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose);
+
+/*
+ * This routine purges all of the queues of frames.
+ */
+void rose_clear_queues(struct sock *sk)
+{
+ skb_queue_purge(&sk->sk_write_queue);
+ skb_queue_purge(&rose_sk(sk)->ack_queue);
+}
+
+/*
+ * This routine purges the input queue of those frames that have been
+ * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
+ * SDL diagram.
+ */
+void rose_frames_acked(struct sock *sk, unsigned short nr)
+{
+ struct sk_buff *skb;
+ struct rose_sock *rose = rose_sk(sk);
+
+ /*
+ * Remove all the ack-ed frames from the ack queue.
+ */
+ if (rose->va != nr) {
+ while (skb_peek(&rose->ack_queue) != NULL && rose->va != nr) {
+ skb = skb_dequeue(&rose->ack_queue);
+ kfree_skb(skb);
+ rose->va = (rose->va + 1) % ROSE_MODULUS;
+ }
+ }
+}
+
+void rose_requeue_frames(struct sock *sk)
+{
+ struct sk_buff *skb, *skb_prev = NULL;
+
+ /*
+ * Requeue all the un-ack-ed frames on the output queue to be picked
+ * up by rose_kick. This arrangement handles the possibility of an
+ * empty output queue.
+ */
+ while ((skb = skb_dequeue(&rose_sk(sk)->ack_queue)) != NULL) {
+ if (skb_prev == NULL)
+ skb_queue_head(&sk->sk_write_queue, skb);
+ else
+ skb_append(skb_prev, skb, &sk->sk_write_queue);
+ skb_prev = skb;
+ }
+}
+
+/*
+ * Validate that the value of nr is between va and vs. Return true or
+ * false for testing.
+ */
+int rose_validate_nr(struct sock *sk, unsigned short nr)
+{
+ struct rose_sock *rose = rose_sk(sk);
+ unsigned short vc = rose->va;
+
+ while (vc != rose->vs) {
+ if (nr == vc) return 1;
+ vc = (vc + 1) % ROSE_MODULUS;
+ }
+
+ return nr == rose->vs;
+}
+
+/*
+ * This routine is called when the packet layer internally generates a
+ * control frame.
+ */
+void rose_write_internal(struct sock *sk, int frametype)
+{
+ struct rose_sock *rose = rose_sk(sk);
+ struct sk_buff *skb;
+ unsigned char *dptr;
+ unsigned char lci1, lci2;
+ char buffer[100];
+ int len, faclen = 0;
+
+ len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 1;
+
+ switch (frametype) {
+ case ROSE_CALL_REQUEST:
+ len += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;
+ faclen = rose_create_facilities(buffer, rose);
+ len += faclen;
+ break;
+ case ROSE_CALL_ACCEPTED:
+ case ROSE_CLEAR_REQUEST:
+ case ROSE_RESET_REQUEST:
+ len += 2;
+ break;
+ }
+
+ if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
+ return;
+
+ /*
+ * Space for AX.25 header and PID.
+ */
+ skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1);
+
+ dptr = skb_put(skb, skb_tailroom(skb));
+
+ lci1 = (rose->lci >> 8) & 0x0F;
+ lci2 = (rose->lci >> 0) & 0xFF;
+
+ switch (frametype) {
+ case ROSE_CALL_REQUEST:
+ *dptr++ = ROSE_GFI | lci1;
+ *dptr++ = lci2;
+ *dptr++ = frametype;
+ *dptr++ = ROSE_CALL_REQ_ADDR_LEN_VAL;
+ memcpy(dptr, &rose->dest_addr, ROSE_ADDR_LEN);
+ dptr += ROSE_ADDR_LEN;
+ memcpy(dptr, &rose->source_addr, ROSE_ADDR_LEN);
+ dptr += ROSE_ADDR_LEN;
+ memcpy(dptr, buffer, faclen);
+ dptr += faclen;
+ break;
+
+ case ROSE_CALL_ACCEPTED:
+ *dptr++ = ROSE_GFI | lci1;
+ *dptr++ = lci2;
+ *dptr++ = frametype;
+ *dptr++ = 0x00; /* Address length */
+ *dptr++ = 0; /* Facilities length */
+ break;
+
+ case ROSE_CLEAR_REQUEST:
+ *dptr++ = ROSE_GFI | lci1;
+ *dptr++ = lci2;
+ *dptr++ = frametype;
+ *dptr++ = rose->cause;
+ *dptr++ = rose->diagnostic;
+ break;
+
+ case ROSE_RESET_REQUEST:
+ *dptr++ = ROSE_GFI | lci1;
+ *dptr++ = lci2;
+ *dptr++ = frametype;
+ *dptr++ = ROSE_DTE_ORIGINATED;
+ *dptr++ = 0;
+ break;
+
+ case ROSE_RR:
+ case ROSE_RNR:
+ *dptr++ = ROSE_GFI | lci1;
+ *dptr++ = lci2;
+ *dptr = frametype;
+ *dptr++ |= (rose->vr << 5) & 0xE0;
+ break;
+
+ case ROSE_CLEAR_CONFIRMATION:
+ case ROSE_RESET_CONFIRMATION:
+ *dptr++ = ROSE_GFI | lci1;
+ *dptr++ = lci2;
+ *dptr++ = frametype;
+ break;
+
+ default:
+ printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype);
+ kfree_skb(skb);
+ return;
+ }
+
+ rose_transmit_link(skb, rose->neighbour);
+}
+
+int rose_decode(struct sk_buff *skb, int *ns, int *nr, int *q, int *d, int *m)
+{
+ unsigned char *frame;
+
+ frame = skb->data;
+
+ *ns = *nr = *q = *d = *m = 0;
+
+ switch (frame[2]) {
+ case ROSE_CALL_REQUEST:
+ case ROSE_CALL_ACCEPTED:
+ case ROSE_CLEAR_REQUEST:
+ case ROSE_CLEAR_CONFIRMATION:
+ case ROSE_RESET_REQUEST:
+ case ROSE_RESET_CONFIRMATION:
+ return frame[2];
+ default:
+ break;
+ }
+
+ if ((frame[2] & 0x1F) == ROSE_RR ||
+ (frame[2] & 0x1F) == ROSE_RNR) {
+ *nr = (frame[2] >> 5) & 0x07;
+ return frame[2] & 0x1F;
+ }
+
+ if ((frame[2] & 0x01) == ROSE_DATA) {
+ *q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
+ *d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;
+ *m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;
+ *nr = (frame[2] >> 5) & 0x07;
+ *ns = (frame[2] >> 1) & 0x07;
+ return ROSE_DATA;
+ }
+
+ return ROSE_ILLEGAL;
+}
+
+static int rose_parse_national(unsigned char *p, struct rose_facilities_struct *facilities, int len)
+{
+ unsigned char *pt;
+ unsigned char l, lg, n = 0;
+ int fac_national_digis_received = 0;
+
+ do {
+ switch (*p & 0xC0) {
+ case 0x00:
+ if (len < 2)
+ return -1;
+ p += 2;
+ n += 2;
+ len -= 2;
+ break;
+
+ case 0x40:
+ if (len < 3)
+ return -1;
+ if (*p == FAC_NATIONAL_RAND)
+ facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);
+ p += 3;
+ n += 3;
+ len -= 3;
+ break;
+
+ case 0x80:
+ if (len < 4)
+ return -1;
+ p += 4;
+ n += 4;
+ len -= 4;
+ break;
+
+ case 0xC0:
+ if (len < 2)
+ return -1;
+ l = p[1];
+ if (len < 2 + l)
+ return -1;
+ if (*p == FAC_NATIONAL_DEST_DIGI) {
+ if (!fac_national_digis_received) {
+ if (l < AX25_ADDR_LEN)
+ return -1;
+ memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);
+ facilities->source_ndigis = 1;
+ }
+ }
+ else if (*p == FAC_NATIONAL_SRC_DIGI) {
+ if (!fac_national_digis_received) {
+ if (l < AX25_ADDR_LEN)
+ return -1;
+ memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);
+ facilities->dest_ndigis = 1;
+ }
+ }
+ else if (*p == FAC_NATIONAL_FAIL_CALL) {
+ if (l < AX25_ADDR_LEN)
+ return -1;
+ memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);
+ }
+ else if (*p == FAC_NATIONAL_FAIL_ADD) {
+ if (l < 1 + ROSE_ADDR_LEN)
+ return -1;
+ memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);
+ }
+ else if (*p == FAC_NATIONAL_DIGIS) {
+ if (l % AX25_ADDR_LEN)
+ return -1;
+ fac_national_digis_received = 1;
+ facilities->source_ndigis = 0;
+ facilities->dest_ndigis = 0;
+ for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {
+ if (pt[6] & AX25_HBIT) {
+ if (facilities->dest_ndigis >= ROSE_MAX_DIGIS)
+ return -1;
+ memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);
+ } else {
+ if (facilities->source_ndigis >= ROSE_MAX_DIGIS)
+ return -1;
+ memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);
+ }
+ }
+ }
+ p += l + 2;
+ n += l + 2;
+ len -= l + 2;
+ break;
+ }
+ } while (*p != 0x00 && len > 0);
+
+ return n;
+}
+
+static int rose_parse_ccitt(unsigned char *p, struct rose_facilities_struct *facilities, int len)
+{
+ unsigned char l, n = 0;
+ char callsign[11];
+
+ do {
+ switch (*p & 0xC0) {
+ case 0x00:
+ if (len < 2)
+ return -1;
+ p += 2;
+ n += 2;
+ len -= 2;
+ break;
+
+ case 0x40:
+ if (len < 3)
+ return -1;
+ p += 3;
+ n += 3;
+ len -= 3;
+ break;
+
+ case 0x80:
+ if (len < 4)
+ return -1;
+ p += 4;
+ n += 4;
+ len -= 4;
+ break;
+
+ case 0xC0:
+ if (len < 2)
+ return -1;
+ l = p[1];
+
+ /* Prevent overflows*/
+ if (l < 10 || l > 20)
+ return -1;
+
+ if (*p == FAC_CCITT_DEST_NSAP) {
+ memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);
+ memcpy(callsign, p + 12, l - 10);
+ callsign[l - 10] = '\0';
+ asc2ax(&facilities->source_call, callsign);
+ }
+ if (*p == FAC_CCITT_SRC_NSAP) {
+ memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);
+ memcpy(callsign, p + 12, l - 10);
+ callsign[l - 10] = '\0';
+ asc2ax(&facilities->dest_call, callsign);
+ }
+ p += l + 2;
+ n += l + 2;
+ len -= l + 2;
+ break;
+ }
+ } while (*p != 0x00 && len > 0);
+
+ return n;
+}
+
+int rose_parse_facilities(unsigned char *p, unsigned packet_len,
+ struct rose_facilities_struct *facilities)
+{
+ int facilities_len, len;
+
+ facilities_len = *p++;
+
+ if (facilities_len == 0 || (unsigned int)facilities_len > packet_len)
+ return 0;
+
+ while (facilities_len >= 3 && *p == 0x00) {
+ facilities_len--;
+ p++;
+
+ switch (*p) {
+ case FAC_NATIONAL: /* National */
+ len = rose_parse_national(p + 1, facilities, facilities_len - 1);
+ break;
+
+ case FAC_CCITT: /* CCITT */
+ len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);
+ break;
+
+ default:
+ printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p);
+ len = 1;
+ break;
+ }
+
+ if (len < 0)
+ return 0;
+ if (WARN_ON(len >= facilities_len))
+ return 0;
+ facilities_len -= len + 1;
+ p += len + 1;
+ }
+
+ return facilities_len == 0;
+}
+
+static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
+{
+ unsigned char *p = buffer + 1;
+ char *callsign;
+ char buf[11];
+ int len, nb;
+
+ /* National Facilities */
+ if (rose->rand != 0 || rose->source_ndigis == 1 || rose->dest_ndigis == 1) {
+ *p++ = 0x00;
+ *p++ = FAC_NATIONAL;
+
+ if (rose->rand != 0) {
+ *p++ = FAC_NATIONAL_RAND;
+ *p++ = (rose->rand >> 8) & 0xFF;
+ *p++ = (rose->rand >> 0) & 0xFF;
+ }
+
+ /* Sent before older facilities */
+ if ((rose->source_ndigis > 0) || (rose->dest_ndigis > 0)) {
+ int maxdigi = 0;
+ *p++ = FAC_NATIONAL_DIGIS;
+ *p++ = AX25_ADDR_LEN * (rose->source_ndigis + rose->dest_ndigis);
+ for (nb = 0 ; nb < rose->source_ndigis ; nb++) {
+ if (++maxdigi >= ROSE_MAX_DIGIS)
+ break;
+ memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);
+ p[6] |= AX25_HBIT;
+ p += AX25_ADDR_LEN;
+ }
+ for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {
+ if (++maxdigi >= ROSE_MAX_DIGIS)
+ break;
+ memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);
+ p[6] &= ~AX25_HBIT;
+ p += AX25_ADDR_LEN;
+ }
+ }
+
+ /* For compatibility */
+ if (rose->source_ndigis > 0) {
+ *p++ = FAC_NATIONAL_SRC_DIGI;
+ *p++ = AX25_ADDR_LEN;
+ memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);
+ p += AX25_ADDR_LEN;
+ }
+
+ /* For compatibility */
+ if (rose->dest_ndigis > 0) {
+ *p++ = FAC_NATIONAL_DEST_DIGI;
+ *p++ = AX25_ADDR_LEN;
+ memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);
+ p += AX25_ADDR_LEN;
+ }
+ }
+
+ *p++ = 0x00;
+ *p++ = FAC_CCITT;
+
+ *p++ = FAC_CCITT_DEST_NSAP;
+
+ callsign = ax2asc(buf, &rose->dest_call);
+
+ *p++ = strlen(callsign) + 10;
+ *p++ = (strlen(callsign) + 9) * 2; /* ??? */
+
+ *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
+ *p++ = ROSE_ADDR_LEN * 2;
+ memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);
+ p += ROSE_ADDR_LEN;
+
+ memcpy(p, callsign, strlen(callsign));
+ p += strlen(callsign);
+
+ *p++ = FAC_CCITT_SRC_NSAP;
+
+ callsign = ax2asc(buf, &rose->source_call);
+
+ *p++ = strlen(callsign) + 10;
+ *p++ = (strlen(callsign) + 9) * 2; /* ??? */
+
+ *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
+ *p++ = ROSE_ADDR_LEN * 2;
+ memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);
+ p += ROSE_ADDR_LEN;
+
+ memcpy(p, callsign, strlen(callsign));
+ p += strlen(callsign);
+
+ len = p - buffer;
+ buffer[0] = len - 1;
+
+ return len;
+}
+
+void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ rose_stop_timer(sk);
+ rose_stop_idletimer(sk);
+
+ rose_clear_queues(sk);
+
+ rose->lci = 0;
+ rose->state = ROSE_STATE_0;
+
+ if (cause != -1)
+ rose->cause = cause;
+
+ if (diagnostic != -1)
+ rose->diagnostic = diagnostic;
+
+ sk->sk_state = TCP_CLOSE;
+ sk->sk_err = reason;
+ sk->sk_shutdown |= SEND_SHUTDOWN;
+
+ if (!sock_flag(sk, SOCK_DEAD)) {
+ sk->sk_state_change(sk);
+ sock_set_flag(sk, SOCK_DEAD);
+ }
+}
diff --git a/net/rose/rose_timer.c b/net/rose/rose_timer.c
new file mode 100644
index 000000000..bc5469d6d
--- /dev/null
+++ b/net/rose/rose_timer.c
@@ -0,0 +1,216 @@
+/*
+ * 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) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.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 <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <net/rose.h>
+
+static void rose_heartbeat_expiry(unsigned long);
+static void rose_timer_expiry(unsigned long);
+static void rose_idletimer_expiry(unsigned long);
+
+void rose_start_heartbeat(struct sock *sk)
+{
+ del_timer(&sk->sk_timer);
+
+ sk->sk_timer.data = (unsigned long)sk;
+ sk->sk_timer.function = &rose_heartbeat_expiry;
+ sk->sk_timer.expires = jiffies + 5 * HZ;
+
+ add_timer(&sk->sk_timer);
+}
+
+void rose_start_t1timer(struct sock *sk)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ del_timer(&rose->timer);
+
+ rose->timer.data = (unsigned long)sk;
+ rose->timer.function = &rose_timer_expiry;
+ rose->timer.expires = jiffies + rose->t1;
+
+ add_timer(&rose->timer);
+}
+
+void rose_start_t2timer(struct sock *sk)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ del_timer(&rose->timer);
+
+ rose->timer.data = (unsigned long)sk;
+ rose->timer.function = &rose_timer_expiry;
+ rose->timer.expires = jiffies + rose->t2;
+
+ add_timer(&rose->timer);
+}
+
+void rose_start_t3timer(struct sock *sk)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ del_timer(&rose->timer);
+
+ rose->timer.data = (unsigned long)sk;
+ rose->timer.function = &rose_timer_expiry;
+ rose->timer.expires = jiffies + rose->t3;
+
+ add_timer(&rose->timer);
+}
+
+void rose_start_hbtimer(struct sock *sk)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ del_timer(&rose->timer);
+
+ rose->timer.data = (unsigned long)sk;
+ rose->timer.function = &rose_timer_expiry;
+ rose->timer.expires = jiffies + rose->hb;
+
+ add_timer(&rose->timer);
+}
+
+void rose_start_idletimer(struct sock *sk)
+{
+ struct rose_sock *rose = rose_sk(sk);
+
+ del_timer(&rose->idletimer);
+
+ if (rose->idle > 0) {
+ rose->idletimer.data = (unsigned long)sk;
+ rose->idletimer.function = &rose_idletimer_expiry;
+ rose->idletimer.expires = jiffies + rose->idle;
+
+ add_timer(&rose->idletimer);
+ }
+}
+
+void rose_stop_heartbeat(struct sock *sk)
+{
+ del_timer(&sk->sk_timer);
+}
+
+void rose_stop_timer(struct sock *sk)
+{
+ del_timer(&rose_sk(sk)->timer);
+}
+
+void rose_stop_idletimer(struct sock *sk)
+{
+ del_timer(&rose_sk(sk)->idletimer);
+}
+
+static void rose_heartbeat_expiry(unsigned long param)
+{
+ struct sock *sk = (struct sock *)param;
+ struct rose_sock *rose = rose_sk(sk);
+
+ bh_lock_sock(sk);
+ switch (rose->state) {
+ case ROSE_STATE_0:
+ /* Magic here: If we listen() and a new link dies before it
+ is accepted() it isn't 'dead' so doesn't get removed. */
+ if (sock_flag(sk, SOCK_DESTROY) ||
+ (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) {
+ bh_unlock_sock(sk);
+ rose_destroy_socket(sk);
+ return;
+ }
+ break;
+
+ case ROSE_STATE_3:
+ /*
+ * Check for the state of the receive buffer.
+ */
+ if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) &&
+ (rose->condition & ROSE_COND_OWN_RX_BUSY)) {
+ rose->condition &= ~ROSE_COND_OWN_RX_BUSY;
+ rose->condition &= ~ROSE_COND_ACK_PENDING;
+ rose->vl = rose->vr;
+ rose_write_internal(sk, ROSE_RR);
+ rose_stop_timer(sk); /* HB */
+ break;
+ }
+ break;
+ }
+
+ rose_start_heartbeat(sk);
+ bh_unlock_sock(sk);
+}
+
+static void rose_timer_expiry(unsigned long param)
+{
+ struct sock *sk = (struct sock *)param;
+ struct rose_sock *rose = rose_sk(sk);
+
+ bh_lock_sock(sk);
+ switch (rose->state) {
+ case ROSE_STATE_1: /* T1 */
+ case ROSE_STATE_4: /* T2 */
+ rose_write_internal(sk, ROSE_CLEAR_REQUEST);
+ rose->state = ROSE_STATE_2;
+ rose_start_t3timer(sk);
+ break;
+
+ case ROSE_STATE_2: /* T3 */
+ rose->neighbour->use--;
+ rose_disconnect(sk, ETIMEDOUT, -1, -1);
+ break;
+
+ case ROSE_STATE_3: /* HB */
+ if (rose->condition & ROSE_COND_ACK_PENDING) {
+ rose->condition &= ~ROSE_COND_ACK_PENDING;
+ rose_enquiry_response(sk);
+ }
+ break;
+ }
+ bh_unlock_sock(sk);
+}
+
+static void rose_idletimer_expiry(unsigned long param)
+{
+ struct sock *sk = (struct sock *)param;
+
+ bh_lock_sock(sk);
+ rose_clear_queues(sk);
+
+ rose_write_internal(sk, ROSE_CLEAR_REQUEST);
+ rose_sk(sk)->state = ROSE_STATE_2;
+
+ rose_start_t3timer(sk);
+
+ 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);
+ }
+ bh_unlock_sock(sk);
+}
diff --git a/net/rose/sysctl_net_rose.c b/net/rose/sysctl_net_rose.c
new file mode 100644
index 000000000..89a927879
--- /dev/null
+++ b/net/rose/sysctl_net_rose.c
@@ -0,0 +1,129 @@
+/*
+ * 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) 1996 Mike Shaver (shaver@zeroknowledge.com)
+ */
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/init.h>
+#include <net/ax25.h>
+#include <net/rose.h>
+
+static int min_timer[] = {1 * HZ};
+static int max_timer[] = {300 * HZ};
+static int min_idle[] = {0 * HZ};
+static int max_idle[] = {65535 * HZ};
+static int min_route[1], max_route[] = {1};
+static int min_ftimer[] = {60 * HZ};
+static int max_ftimer[] = {600 * HZ};
+static int min_maxvcs[] = {1}, max_maxvcs[] = {254};
+static int min_window[] = {1}, max_window[] = {7};
+
+static struct ctl_table_header *rose_table_header;
+
+static struct ctl_table rose_table[] = {
+ {
+ .procname = "restart_request_timeout",
+ .data = &sysctl_rose_restart_request_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_timer,
+ .extra2 = &max_timer
+ },
+ {
+ .procname = "call_request_timeout",
+ .data = &sysctl_rose_call_request_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_timer,
+ .extra2 = &max_timer
+ },
+ {
+ .procname = "reset_request_timeout",
+ .data = &sysctl_rose_reset_request_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_timer,
+ .extra2 = &max_timer
+ },
+ {
+ .procname = "clear_request_timeout",
+ .data = &sysctl_rose_clear_request_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_timer,
+ .extra2 = &max_timer
+ },
+ {
+ .procname = "no_activity_timeout",
+ .data = &sysctl_rose_no_activity_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_idle,
+ .extra2 = &max_idle
+ },
+ {
+ .procname = "acknowledge_hold_back_timeout",
+ .data = &sysctl_rose_ack_hold_back_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_timer,
+ .extra2 = &max_timer
+ },
+ {
+ .procname = "routing_control",
+ .data = &sysctl_rose_routing_control,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_route,
+ .extra2 = &max_route
+ },
+ {
+ .procname = "link_fail_timeout",
+ .data = &sysctl_rose_link_fail_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_ftimer,
+ .extra2 = &max_ftimer
+ },
+ {
+ .procname = "maximum_virtual_circuits",
+ .data = &sysctl_rose_maximum_vcs,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_maxvcs,
+ .extra2 = &max_maxvcs
+ },
+ {
+ .procname = "window_size",
+ .data = &sysctl_rose_window_size,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_window,
+ .extra2 = &max_window
+ },
+ { }
+};
+
+void __init rose_register_sysctl(void)
+{
+ rose_table_header = register_net_sysctl(&init_net, "net/rose", rose_table);
+}
+
+void rose_unregister_sysctl(void)
+{
+ unregister_net_sysctl_table(rose_table_header);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-18 19:42:06 +0000