![Joe Perches](/assets/img/avatar_default.png)
Make the case labels the same indent as the switch. git diff -w shows 80 column line reflowing. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1826 lines
40 KiB
C
1826 lines
40 KiB
C
/*
|
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* X.25 Packet Layer release 002
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*
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* This is ALPHA test software. This code may break your machine,
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* randomly fail to work with new releases, misbehave and/or generally
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* screw up. It might even work.
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*
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* This code REQUIRES 2.1.15 or higher
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*
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* This module:
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* This module is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* History
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* X.25 001 Jonathan Naylor Started coding.
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* X.25 002 Jonathan Naylor Centralised disconnect handling.
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* New timer architecture.
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* 2000-03-11 Henner Eisen MSG_EOR handling more POSIX compliant.
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* 2000-03-22 Daniela Squassoni Allowed disabling/enabling of
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* facilities negotiation and increased
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* the throughput upper limit.
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* 2000-08-27 Arnaldo C. Melo s/suser/capable/ + micro cleanups
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* 2000-09-04 Henner Eisen Set sock->state in x25_accept().
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* Fixed x25_output() related skb leakage.
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* 2000-10-02 Henner Eisen Made x25_kick() single threaded per socket.
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* 2000-10-27 Henner Eisen MSG_DONTWAIT for fragment allocation.
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* 2000-11-14 Henner Eisen Closing datalink from NETDEV_GOING_DOWN
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* 2002-10-06 Arnaldo C. Melo Get rid of cli/sti, move proc stuff to
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* x25_proc.c, using seq_file
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* 2005-04-02 Shaun Pereira Selective sub address matching
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* with call user data
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* 2005-04-15 Shaun Pereira Fast select with no restriction on
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* response
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*/
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#include <linux/module.h>
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#include <linux/capability.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/net.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <net/tcp_states.h>
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#include <asm/uaccess.h>
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#include <linux/fcntl.h>
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#include <linux/termios.h> /* For TIOCINQ/OUTQ */
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#include <linux/notifier.h>
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#include <linux/init.h>
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#include <linux/compat.h>
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#include <linux/ctype.h>
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#include <net/x25.h>
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#include <net/compat.h>
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int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20;
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int sysctl_x25_call_request_timeout = X25_DEFAULT_T21;
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int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22;
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int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23;
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int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2;
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int sysctl_x25_forward = 0;
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HLIST_HEAD(x25_list);
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DEFINE_RWLOCK(x25_list_lock);
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static const struct proto_ops x25_proto_ops;
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static struct x25_address null_x25_address = {" "};
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#ifdef CONFIG_COMPAT
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struct compat_x25_subscrip_struct {
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char device[200-sizeof(compat_ulong_t)];
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compat_ulong_t global_facil_mask;
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compat_uint_t extended;
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};
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#endif
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int x25_parse_address_block(struct sk_buff *skb,
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struct x25_address *called_addr,
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struct x25_address *calling_addr)
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{
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unsigned char len;
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int needed;
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int rc;
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if (skb->len < 1) {
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/* packet has no address block */
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rc = 0;
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goto empty;
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}
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len = *skb->data;
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needed = 1 + (len >> 4) + (len & 0x0f);
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if (skb->len < needed) {
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/* packet is too short to hold the addresses it claims
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to hold */
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rc = -1;
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goto empty;
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}
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return x25_addr_ntoa(skb->data, called_addr, calling_addr);
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empty:
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*called_addr->x25_addr = 0;
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*calling_addr->x25_addr = 0;
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return rc;
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}
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int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr,
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struct x25_address *calling_addr)
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{
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unsigned int called_len, calling_len;
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char *called, *calling;
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unsigned int i;
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called_len = (*p >> 0) & 0x0F;
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calling_len = (*p >> 4) & 0x0F;
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called = called_addr->x25_addr;
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calling = calling_addr->x25_addr;
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p++;
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for (i = 0; i < (called_len + calling_len); i++) {
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if (i < called_len) {
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if (i % 2 != 0) {
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*called++ = ((*p >> 0) & 0x0F) + '0';
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p++;
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} else {
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*called++ = ((*p >> 4) & 0x0F) + '0';
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}
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} else {
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if (i % 2 != 0) {
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*calling++ = ((*p >> 0) & 0x0F) + '0';
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p++;
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} else {
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*calling++ = ((*p >> 4) & 0x0F) + '0';
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}
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}
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}
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*called = *calling = '\0';
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return 1 + (called_len + calling_len + 1) / 2;
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}
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int x25_addr_aton(unsigned char *p, struct x25_address *called_addr,
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struct x25_address *calling_addr)
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{
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unsigned int called_len, calling_len;
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char *called, *calling;
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int i;
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called = called_addr->x25_addr;
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calling = calling_addr->x25_addr;
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called_len = strlen(called);
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calling_len = strlen(calling);
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*p++ = (calling_len << 4) | (called_len << 0);
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for (i = 0; i < (called_len + calling_len); i++) {
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if (i < called_len) {
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if (i % 2 != 0) {
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*p |= (*called++ - '0') << 0;
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p++;
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} else {
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*p = 0x00;
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*p |= (*called++ - '0') << 4;
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}
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} else {
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if (i % 2 != 0) {
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*p |= (*calling++ - '0') << 0;
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p++;
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} else {
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*p = 0x00;
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*p |= (*calling++ - '0') << 4;
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}
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}
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}
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return 1 + (called_len + calling_len + 1) / 2;
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}
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/*
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* Socket removal during an interrupt is now safe.
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*/
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static void x25_remove_socket(struct sock *sk)
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{
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write_lock_bh(&x25_list_lock);
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sk_del_node_init(sk);
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write_unlock_bh(&x25_list_lock);
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}
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/*
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* Kill all bound sockets on a dropped device.
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*/
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static void x25_kill_by_device(struct net_device *dev)
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{
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struct sock *s;
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struct hlist_node *node;
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write_lock_bh(&x25_list_lock);
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sk_for_each(s, node, &x25_list)
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if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev)
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x25_disconnect(s, ENETUNREACH, 0, 0);
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write_unlock_bh(&x25_list_lock);
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}
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/*
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* Handle device status changes.
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*/
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static int x25_device_event(struct notifier_block *this, unsigned long event,
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void *ptr)
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{
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struct net_device *dev = ptr;
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struct x25_neigh *nb;
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if (!net_eq(dev_net(dev), &init_net))
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return NOTIFY_DONE;
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if (dev->type == ARPHRD_X25
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#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
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|| dev->type == ARPHRD_ETHER
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#endif
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) {
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switch (event) {
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case NETDEV_UP:
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x25_link_device_up(dev);
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break;
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case NETDEV_GOING_DOWN:
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nb = x25_get_neigh(dev);
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if (nb) {
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x25_terminate_link(nb);
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x25_neigh_put(nb);
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}
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break;
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case NETDEV_DOWN:
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x25_kill_by_device(dev);
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x25_route_device_down(dev);
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x25_link_device_down(dev);
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break;
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}
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}
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return NOTIFY_DONE;
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}
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/*
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* Add a socket to the bound sockets list.
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*/
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static void x25_insert_socket(struct sock *sk)
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{
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write_lock_bh(&x25_list_lock);
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sk_add_node(sk, &x25_list);
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write_unlock_bh(&x25_list_lock);
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}
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/*
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* Find a socket that wants to accept the Call Request we just
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* received. Check the full list for an address/cud match.
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* If no cuds match return the next_best thing, an address match.
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* Note: if a listening socket has cud set it must only get calls
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* with matching cud.
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*/
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static struct sock *x25_find_listener(struct x25_address *addr,
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struct sk_buff *skb)
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{
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struct sock *s;
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struct sock *next_best;
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struct hlist_node *node;
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read_lock_bh(&x25_list_lock);
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next_best = NULL;
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sk_for_each(s, node, &x25_list)
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if ((!strcmp(addr->x25_addr,
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x25_sk(s)->source_addr.x25_addr) ||
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!strcmp(addr->x25_addr,
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null_x25_address.x25_addr)) &&
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s->sk_state == TCP_LISTEN) {
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/*
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* Found a listening socket, now check the incoming
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* call user data vs this sockets call user data
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*/
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if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) {
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if((memcmp(x25_sk(s)->calluserdata.cuddata,
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skb->data,
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x25_sk(s)->cudmatchlength)) == 0) {
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sock_hold(s);
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goto found;
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}
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} else
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next_best = s;
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}
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if (next_best) {
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s = next_best;
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sock_hold(s);
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goto found;
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}
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s = NULL;
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found:
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read_unlock_bh(&x25_list_lock);
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return s;
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}
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/*
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* Find a connected X.25 socket given my LCI and neighbour.
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*/
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static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb)
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{
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struct sock *s;
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struct hlist_node *node;
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sk_for_each(s, node, &x25_list)
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if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) {
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sock_hold(s);
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goto found;
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}
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s = NULL;
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found:
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return s;
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}
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struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb)
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{
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struct sock *s;
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read_lock_bh(&x25_list_lock);
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s = __x25_find_socket(lci, nb);
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read_unlock_bh(&x25_list_lock);
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return s;
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}
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/*
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* Find a unique LCI for a given device.
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*/
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static unsigned int x25_new_lci(struct x25_neigh *nb)
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{
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unsigned int lci = 1;
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struct sock *sk;
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read_lock_bh(&x25_list_lock);
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while ((sk = __x25_find_socket(lci, nb)) != NULL) {
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sock_put(sk);
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if (++lci == 4096) {
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lci = 0;
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break;
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}
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}
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read_unlock_bh(&x25_list_lock);
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return lci;
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}
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|
|
|
/*
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* Deferred destroy.
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*/
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static void __x25_destroy_socket(struct sock *);
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/*
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* handler for deferred kills.
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*/
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static void x25_destroy_timer(unsigned long data)
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{
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x25_destroy_socket_from_timer((struct sock *)data);
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}
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/*
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* This is called from user mode and the timers. Thus it protects itself
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* against interrupt users but doesn't worry about being called during
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* work. Once it is removed from the queue no interrupt or bottom half
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* will touch it and we are (fairly 8-) ) safe.
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* Not static as it's used by the timer
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*/
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static void __x25_destroy_socket(struct sock *sk)
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{
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struct sk_buff *skb;
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|
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x25_stop_heartbeat(sk);
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x25_stop_timer(sk);
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|
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x25_remove_socket(sk);
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x25_clear_queues(sk); /* Flush the queues */
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while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
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if (skb->sk != sk) { /* A pending connection */
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/*
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* Queue the unaccepted socket for death
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*/
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skb->sk->sk_state = TCP_LISTEN;
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sock_set_flag(skb->sk, SOCK_DEAD);
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x25_start_heartbeat(skb->sk);
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x25_sk(skb->sk)->state = X25_STATE_0;
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}
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|
|
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kfree_skb(skb);
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}
|
|
|
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if (sk_has_allocations(sk)) {
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/* Defer: outstanding buffers */
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sk->sk_timer.expires = jiffies + 10 * HZ;
|
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sk->sk_timer.function = x25_destroy_timer;
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sk->sk_timer.data = (unsigned long)sk;
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add_timer(&sk->sk_timer);
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} else {
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/* drop last reference so sock_put will free */
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__sock_put(sk);
|
|
}
|
|
}
|
|
|
|
void x25_destroy_socket_from_timer(struct sock *sk)
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{
|
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sock_hold(sk);
|
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bh_lock_sock(sk);
|
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__x25_destroy_socket(sk);
|
|
bh_unlock_sock(sk);
|
|
sock_put(sk);
|
|
}
|
|
|
|
/*
|
|
* Handling for system calls applied via the various interfaces to a
|
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* X.25 socket object.
|
|
*/
|
|
|
|
static int x25_setsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, unsigned int optlen)
|
|
{
|
|
int opt;
|
|
struct sock *sk = sock->sk;
|
|
int rc = -ENOPROTOOPT;
|
|
|
|
if (level != SOL_X25 || optname != X25_QBITINCL)
|
|
goto out;
|
|
|
|
rc = -EINVAL;
|
|
if (optlen < sizeof(int))
|
|
goto out;
|
|
|
|
rc = -EFAULT;
|
|
if (get_user(opt, (int __user *)optval))
|
|
goto out;
|
|
|
|
if (opt)
|
|
set_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags);
|
|
else
|
|
clear_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags);
|
|
rc = 0;
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static int x25_getsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int val, len, rc = -ENOPROTOOPT;
|
|
|
|
if (level != SOL_X25 || optname != X25_QBITINCL)
|
|
goto out;
|
|
|
|
rc = -EFAULT;
|
|
if (get_user(len, optlen))
|
|
goto out;
|
|
|
|
len = min_t(unsigned int, len, sizeof(int));
|
|
|
|
rc = -EINVAL;
|
|
if (len < 0)
|
|
goto out;
|
|
|
|
rc = -EFAULT;
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
val = test_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags);
|
|
rc = copy_to_user(optval, &val, len) ? -EFAULT : 0;
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static int x25_listen(struct socket *sock, int backlog)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int rc = -EOPNOTSUPP;
|
|
|
|
lock_sock(sk);
|
|
if (sk->sk_state != TCP_LISTEN) {
|
|
memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN);
|
|
sk->sk_max_ack_backlog = backlog;
|
|
sk->sk_state = TCP_LISTEN;
|
|
rc = 0;
|
|
}
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static struct proto x25_proto = {
|
|
.name = "X25",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct x25_sock),
|
|
};
|
|
|
|
static struct sock *x25_alloc_socket(struct net *net)
|
|
{
|
|
struct x25_sock *x25;
|
|
struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto);
|
|
|
|
if (!sk)
|
|
goto out;
|
|
|
|
sock_init_data(NULL, sk);
|
|
|
|
x25 = x25_sk(sk);
|
|
skb_queue_head_init(&x25->ack_queue);
|
|
skb_queue_head_init(&x25->fragment_queue);
|
|
skb_queue_head_init(&x25->interrupt_in_queue);
|
|
skb_queue_head_init(&x25->interrupt_out_queue);
|
|
out:
|
|
return sk;
|
|
}
|
|
|
|
static int x25_create(struct net *net, struct socket *sock, int protocol,
|
|
int kern)
|
|
{
|
|
struct sock *sk;
|
|
struct x25_sock *x25;
|
|
int rc = -EAFNOSUPPORT;
|
|
|
|
if (!net_eq(net, &init_net))
|
|
goto out;
|
|
|
|
rc = -ESOCKTNOSUPPORT;
|
|
if (sock->type != SOCK_SEQPACKET)
|
|
goto out;
|
|
|
|
rc = -EINVAL;
|
|
if (protocol)
|
|
goto out;
|
|
|
|
rc = -ENOBUFS;
|
|
if ((sk = x25_alloc_socket(net)) == NULL)
|
|
goto out;
|
|
|
|
x25 = x25_sk(sk);
|
|
|
|
sock_init_data(sock, sk);
|
|
|
|
x25_init_timers(sk);
|
|
|
|
sock->ops = &x25_proto_ops;
|
|
sk->sk_protocol = protocol;
|
|
sk->sk_backlog_rcv = x25_backlog_rcv;
|
|
|
|
x25->t21 = sysctl_x25_call_request_timeout;
|
|
x25->t22 = sysctl_x25_reset_request_timeout;
|
|
x25->t23 = sysctl_x25_clear_request_timeout;
|
|
x25->t2 = sysctl_x25_ack_holdback_timeout;
|
|
x25->state = X25_STATE_0;
|
|
x25->cudmatchlength = 0;
|
|
set_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); /* normally no cud */
|
|
/* on call accept */
|
|
|
|
x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE;
|
|
x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE;
|
|
x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE;
|
|
x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE;
|
|
x25->facilities.throughput = 0; /* by default don't negotiate
|
|
throughput */
|
|
x25->facilities.reverse = X25_DEFAULT_REVERSE;
|
|
x25->dte_facilities.calling_len = 0;
|
|
x25->dte_facilities.called_len = 0;
|
|
memset(x25->dte_facilities.called_ae, '\0',
|
|
sizeof(x25->dte_facilities.called_ae));
|
|
memset(x25->dte_facilities.calling_ae, '\0',
|
|
sizeof(x25->dte_facilities.calling_ae));
|
|
|
|
rc = 0;
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static struct sock *x25_make_new(struct sock *osk)
|
|
{
|
|
struct sock *sk = NULL;
|
|
struct x25_sock *x25, *ox25;
|
|
|
|
if (osk->sk_type != SOCK_SEQPACKET)
|
|
goto out;
|
|
|
|
if ((sk = x25_alloc_socket(sock_net(osk))) == NULL)
|
|
goto out;
|
|
|
|
x25 = x25_sk(sk);
|
|
|
|
sk->sk_type = osk->sk_type;
|
|
sk->sk_priority = osk->sk_priority;
|
|
sk->sk_protocol = osk->sk_protocol;
|
|
sk->sk_rcvbuf = osk->sk_rcvbuf;
|
|
sk->sk_sndbuf = osk->sk_sndbuf;
|
|
sk->sk_state = TCP_ESTABLISHED;
|
|
sk->sk_backlog_rcv = osk->sk_backlog_rcv;
|
|
sock_copy_flags(sk, osk);
|
|
|
|
ox25 = x25_sk(osk);
|
|
x25->t21 = ox25->t21;
|
|
x25->t22 = ox25->t22;
|
|
x25->t23 = ox25->t23;
|
|
x25->t2 = ox25->t2;
|
|
x25->flags = ox25->flags;
|
|
x25->facilities = ox25->facilities;
|
|
x25->dte_facilities = ox25->dte_facilities;
|
|
x25->cudmatchlength = ox25->cudmatchlength;
|
|
|
|
clear_bit(X25_INTERRUPT_FLAG, &x25->flags);
|
|
x25_init_timers(sk);
|
|
out:
|
|
return sk;
|
|
}
|
|
|
|
static int x25_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct x25_sock *x25;
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
x25 = x25_sk(sk);
|
|
|
|
sock_hold(sk);
|
|
lock_sock(sk);
|
|
switch (x25->state) {
|
|
|
|
case X25_STATE_0:
|
|
case X25_STATE_2:
|
|
x25_disconnect(sk, 0, 0, 0);
|
|
__x25_destroy_socket(sk);
|
|
goto out;
|
|
|
|
case X25_STATE_1:
|
|
case X25_STATE_3:
|
|
case X25_STATE_4:
|
|
x25_clear_queues(sk);
|
|
x25_write_internal(sk, X25_CLEAR_REQUEST);
|
|
x25_start_t23timer(sk);
|
|
x25->state = X25_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;
|
|
}
|
|
|
|
sock_orphan(sk);
|
|
out:
|
|
release_sock(sk);
|
|
sock_put(sk);
|
|
return 0;
|
|
}
|
|
|
|
static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
|
|
int len, i, rc = 0;
|
|
|
|
if (!sock_flag(sk, SOCK_ZAPPED) ||
|
|
addr_len != sizeof(struct sockaddr_x25) ||
|
|
addr->sx25_family != AF_X25) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = strlen(addr->sx25_addr.x25_addr);
|
|
for (i = 0; i < len; i++) {
|
|
if (!isdigit(addr->sx25_addr.x25_addr[i])) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
lock_sock(sk);
|
|
x25_sk(sk)->source_addr = addr->sx25_addr;
|
|
x25_insert_socket(sk);
|
|
sock_reset_flag(sk, SOCK_ZAPPED);
|
|
release_sock(sk);
|
|
SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static int x25_wait_for_connection_establishment(struct sock *sk)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int rc;
|
|
|
|
add_wait_queue_exclusive(sk_sleep(sk), &wait);
|
|
for (;;) {
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
rc = -ERESTARTSYS;
|
|
if (signal_pending(current))
|
|
break;
|
|
rc = sock_error(sk);
|
|
if (rc) {
|
|
sk->sk_socket->state = SS_UNCONNECTED;
|
|
break;
|
|
}
|
|
rc = 0;
|
|
if (sk->sk_state != TCP_ESTABLISHED) {
|
|
release_sock(sk);
|
|
schedule();
|
|
lock_sock(sk);
|
|
} else
|
|
break;
|
|
}
|
|
__set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
|
return rc;
|
|
}
|
|
|
|
static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
|
|
int addr_len, int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct x25_sock *x25 = x25_sk(sk);
|
|
struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
|
|
struct x25_route *rt;
|
|
int rc = 0;
|
|
|
|
lock_sock(sk);
|
|
if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
|
|
sock->state = SS_CONNECTED;
|
|
goto out; /* Connect completed during a ERESTARTSYS event */
|
|
}
|
|
|
|
rc = -ECONNREFUSED;
|
|
if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
|
|
sock->state = SS_UNCONNECTED;
|
|
goto out;
|
|
}
|
|
|
|
rc = -EISCONN; /* No reconnect on a seqpacket socket */
|
|
if (sk->sk_state == TCP_ESTABLISHED)
|
|
goto out;
|
|
|
|
sk->sk_state = TCP_CLOSE;
|
|
sock->state = SS_UNCONNECTED;
|
|
|
|
rc = -EINVAL;
|
|
if (addr_len != sizeof(struct sockaddr_x25) ||
|
|
addr->sx25_family != AF_X25)
|
|
goto out;
|
|
|
|
rc = -ENETUNREACH;
|
|
rt = x25_get_route(&addr->sx25_addr);
|
|
if (!rt)
|
|
goto out;
|
|
|
|
x25->neighbour = x25_get_neigh(rt->dev);
|
|
if (!x25->neighbour)
|
|
goto out_put_route;
|
|
|
|
x25_limit_facilities(&x25->facilities, x25->neighbour);
|
|
|
|
x25->lci = x25_new_lci(x25->neighbour);
|
|
if (!x25->lci)
|
|
goto out_put_neigh;
|
|
|
|
rc = -EINVAL;
|
|
if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
|
|
goto out_put_neigh;
|
|
|
|
if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr))
|
|
memset(&x25->source_addr, '\0', X25_ADDR_LEN);
|
|
|
|
x25->dest_addr = addr->sx25_addr;
|
|
|
|
/* Move to connecting socket, start sending Connect Requests */
|
|
sock->state = SS_CONNECTING;
|
|
sk->sk_state = TCP_SYN_SENT;
|
|
|
|
x25->state = X25_STATE_1;
|
|
|
|
x25_write_internal(sk, X25_CALL_REQUEST);
|
|
|
|
x25_start_heartbeat(sk);
|
|
x25_start_t21timer(sk);
|
|
|
|
/* Now the loop */
|
|
rc = -EINPROGRESS;
|
|
if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
|
|
goto out_put_neigh;
|
|
|
|
rc = x25_wait_for_connection_establishment(sk);
|
|
if (rc)
|
|
goto out_put_neigh;
|
|
|
|
sock->state = SS_CONNECTED;
|
|
rc = 0;
|
|
out_put_neigh:
|
|
if (rc)
|
|
x25_neigh_put(x25->neighbour);
|
|
out_put_route:
|
|
x25_route_put(rt);
|
|
out:
|
|
release_sock(sk);
|
|
return rc;
|
|
}
|
|
|
|
static int x25_wait_for_data(struct sock *sk, long timeout)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int rc = 0;
|
|
|
|
add_wait_queue_exclusive(sk_sleep(sk), &wait);
|
|
for (;;) {
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
if (sk->sk_shutdown & RCV_SHUTDOWN)
|
|
break;
|
|
rc = -ERESTARTSYS;
|
|
if (signal_pending(current))
|
|
break;
|
|
rc = -EAGAIN;
|
|
if (!timeout)
|
|
break;
|
|
rc = 0;
|
|
if (skb_queue_empty(&sk->sk_receive_queue)) {
|
|
release_sock(sk);
|
|
timeout = schedule_timeout(timeout);
|
|
lock_sock(sk);
|
|
} else
|
|
break;
|
|
}
|
|
__set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
|
return rc;
|
|
}
|
|
|
|
static int x25_accept(struct socket *sock, struct socket *newsock, int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct sock *newsk;
|
|
struct sk_buff *skb;
|
|
int rc = -EINVAL;
|
|
|
|
if (!sk)
|
|
goto out;
|
|
|
|
rc = -EOPNOTSUPP;
|
|
if (sk->sk_type != SOCK_SEQPACKET)
|
|
goto out;
|
|
|
|
lock_sock(sk);
|
|
rc = -EINVAL;
|
|
if (sk->sk_state != TCP_LISTEN)
|
|
goto out2;
|
|
|
|
rc = x25_wait_for_data(sk, sk->sk_rcvtimeo);
|
|
if (rc)
|
|
goto out2;
|
|
skb = skb_dequeue(&sk->sk_receive_queue);
|
|
rc = -EINVAL;
|
|
if (!skb->sk)
|
|
goto out2;
|
|
newsk = skb->sk;
|
|
sock_graft(newsk, newsock);
|
|
|
|
/* Now attach up the new socket */
|
|
skb->sk = NULL;
|
|
kfree_skb(skb);
|
|
sk->sk_ack_backlog--;
|
|
newsock->state = SS_CONNECTED;
|
|
rc = 0;
|
|
out2:
|
|
release_sock(sk);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static int x25_getname(struct socket *sock, struct sockaddr *uaddr,
|
|
int *uaddr_len, int peer)
|
|
{
|
|
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr;
|
|
struct sock *sk = sock->sk;
|
|
struct x25_sock *x25 = x25_sk(sk);
|
|
int rc = 0;
|
|
|
|
if (peer) {
|
|
if (sk->sk_state != TCP_ESTABLISHED) {
|
|
rc = -ENOTCONN;
|
|
goto out;
|
|
}
|
|
sx25->sx25_addr = x25->dest_addr;
|
|
} else
|
|
sx25->sx25_addr = x25->source_addr;
|
|
|
|
sx25->sx25_family = AF_X25;
|
|
*uaddr_len = sizeof(*sx25);
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb,
|
|
unsigned int lci)
|
|
{
|
|
struct sock *sk;
|
|
struct sock *make;
|
|
struct x25_sock *makex25;
|
|
struct x25_address source_addr, dest_addr;
|
|
struct x25_facilities facilities;
|
|
struct x25_dte_facilities dte_facilities;
|
|
int len, addr_len, rc;
|
|
|
|
/*
|
|
* Remove the LCI and frame type.
|
|
*/
|
|
skb_pull(skb, X25_STD_MIN_LEN);
|
|
|
|
/*
|
|
* Extract the X.25 addresses and convert them to ASCII strings,
|
|
* and remove them.
|
|
*
|
|
* Address block is mandatory in call request packets
|
|
*/
|
|
addr_len = x25_parse_address_block(skb, &source_addr, &dest_addr);
|
|
if (addr_len <= 0)
|
|
goto out_clear_request;
|
|
skb_pull(skb, addr_len);
|
|
|
|
/*
|
|
* Get the length of the facilities, skip past them for the moment
|
|
* get the call user data because this is needed to determine
|
|
* the correct listener
|
|
*
|
|
* Facilities length is mandatory in call request packets
|
|
*/
|
|
if (skb->len < 1)
|
|
goto out_clear_request;
|
|
len = skb->data[0] + 1;
|
|
if (skb->len < len)
|
|
goto out_clear_request;
|
|
skb_pull(skb,len);
|
|
|
|
/*
|
|
* Find a listener for the particular address/cud pair.
|
|
*/
|
|
sk = x25_find_listener(&source_addr,skb);
|
|
skb_push(skb,len);
|
|
|
|
if (sk != NULL && sk_acceptq_is_full(sk)) {
|
|
goto out_sock_put;
|
|
}
|
|
|
|
/*
|
|
* We dont have any listeners for this incoming call.
|
|
* Try forwarding it.
|
|
*/
|
|
if (sk == NULL) {
|
|
skb_push(skb, addr_len + X25_STD_MIN_LEN);
|
|
if (sysctl_x25_forward &&
|
|
x25_forward_call(&dest_addr, nb, skb, lci) > 0)
|
|
{
|
|
/* Call was forwarded, dont process it any more */
|
|
kfree_skb(skb);
|
|
rc = 1;
|
|
goto out;
|
|
} else {
|
|
/* No listeners, can't forward, clear the call */
|
|
goto out_clear_request;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Try to reach a compromise on the requested facilities.
|
|
*/
|
|
len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities);
|
|
if (len == -1)
|
|
goto out_sock_put;
|
|
|
|
/*
|
|
* current neighbour/link might impose additional limits
|
|
* on certain facilties
|
|
*/
|
|
|
|
x25_limit_facilities(&facilities, nb);
|
|
|
|
/*
|
|
* Try to create a new socket.
|
|
*/
|
|
make = x25_make_new(sk);
|
|
if (!make)
|
|
goto out_sock_put;
|
|
|
|
/*
|
|
* Remove the facilities
|
|
*/
|
|
skb_pull(skb, len);
|
|
|
|
skb->sk = make;
|
|
make->sk_state = TCP_ESTABLISHED;
|
|
|
|
makex25 = x25_sk(make);
|
|
makex25->lci = lci;
|
|
makex25->dest_addr = dest_addr;
|
|
makex25->source_addr = source_addr;
|
|
makex25->neighbour = nb;
|
|
makex25->facilities = facilities;
|
|
makex25->dte_facilities= dte_facilities;
|
|
makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
|
|
/* ensure no reverse facil on accept */
|
|
makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
|
|
/* ensure no calling address extension on accept */
|
|
makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE;
|
|
makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;
|
|
|
|
/* Normally all calls are accepted immediately */
|
|
if (test_bit(X25_ACCPT_APPRV_FLAG, &makex25->flags)) {
|
|
x25_write_internal(make, X25_CALL_ACCEPTED);
|
|
makex25->state = X25_STATE_3;
|
|
}
|
|
|
|
/*
|
|
* Incoming Call User Data.
|
|
*/
|
|
skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len);
|
|
makex25->calluserdata.cudlength = skb->len;
|
|
|
|
sk->sk_ack_backlog++;
|
|
|
|
x25_insert_socket(make);
|
|
|
|
skb_queue_head(&sk->sk_receive_queue, skb);
|
|
|
|
x25_start_heartbeat(make);
|
|
|
|
if (!sock_flag(sk, SOCK_DEAD))
|
|
sk->sk_data_ready(sk, skb->len);
|
|
rc = 1;
|
|
sock_put(sk);
|
|
out:
|
|
return rc;
|
|
out_sock_put:
|
|
sock_put(sk);
|
|
out_clear_request:
|
|
rc = 0;
|
|
x25_transmit_clear_request(nb, lci, 0x01);
|
|
goto out;
|
|
}
|
|
|
|
static int x25_sendmsg(struct kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct x25_sock *x25 = x25_sk(sk);
|
|
struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name;
|
|
struct sockaddr_x25 sx25;
|
|
struct sk_buff *skb;
|
|
unsigned char *asmptr;
|
|
int noblock = msg->msg_flags & MSG_DONTWAIT;
|
|
size_t size;
|
|
int qbit = 0, rc = -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT))
|
|
goto out;
|
|
|
|
/* we currently don't support segmented records at the user interface */
|
|
if (!(msg->msg_flags & (MSG_EOR|MSG_OOB)))
|
|
goto out;
|
|
|
|
rc = -EADDRNOTAVAIL;
|
|
if (sock_flag(sk, SOCK_ZAPPED))
|
|
goto out;
|
|
|
|
rc = -EPIPE;
|
|
if (sk->sk_shutdown & SEND_SHUTDOWN) {
|
|
send_sig(SIGPIPE, current, 0);
|
|
goto out;
|
|
}
|
|
|
|
rc = -ENETUNREACH;
|
|
if (!x25->neighbour)
|
|
goto out;
|
|
|
|
if (usx25) {
|
|
rc = -EINVAL;
|
|
if (msg->msg_namelen < sizeof(sx25))
|
|
goto out;
|
|
memcpy(&sx25, usx25, sizeof(sx25));
|
|
rc = -EISCONN;
|
|
if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr))
|
|
goto out;
|
|
rc = -EINVAL;
|
|
if (sx25.sx25_family != AF_X25)
|
|
goto out;
|
|
} else {
|
|
/*
|
|
* FIXME 1003.1g - if the socket is like this because
|
|
* it has become closed (not started closed) we ought
|
|
* to SIGPIPE, EPIPE;
|
|
*/
|
|
rc = -ENOTCONN;
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
|
goto out;
|
|
|
|
sx25.sx25_family = AF_X25;
|
|
sx25.sx25_addr = x25->dest_addr;
|
|
}
|
|
|
|
/* Sanity check the packet size */
|
|
if (len > 65535) {
|
|
rc = -EMSGSIZE;
|
|
goto out;
|
|
}
|
|
|
|
SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n");
|
|
|
|
/* Build a packet */
|
|
SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n");
|
|
|
|
if ((msg->msg_flags & MSG_OOB) && len > 32)
|
|
len = 32;
|
|
|
|
size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
|
|
|
|
release_sock(sk);
|
|
skb = sock_alloc_send_skb(sk, size, noblock, &rc);
|
|
lock_sock(sk);
|
|
if (!skb)
|
|
goto out;
|
|
X25_SKB_CB(skb)->flags = msg->msg_flags;
|
|
|
|
skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
|
|
|
|
/*
|
|
* Put the data on the end
|
|
*/
|
|
SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n");
|
|
|
|
skb_reset_transport_header(skb);
|
|
skb_put(skb, len);
|
|
|
|
rc = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
|
|
if (rc)
|
|
goto out_kfree_skb;
|
|
|
|
/*
|
|
* 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 (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
|
|
qbit = skb->data[0];
|
|
skb_pull(skb, 1);
|
|
}
|
|
|
|
/*
|
|
* Push down the X.25 header
|
|
*/
|
|
SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n");
|
|
|
|
if (msg->msg_flags & MSG_OOB) {
|
|
if (x25->neighbour->extended) {
|
|
asmptr = skb_push(skb, X25_STD_MIN_LEN);
|
|
*asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
|
|
*asmptr++ = (x25->lci >> 0) & 0xFF;
|
|
*asmptr++ = X25_INTERRUPT;
|
|
} else {
|
|
asmptr = skb_push(skb, X25_STD_MIN_LEN);
|
|
*asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
|
|
*asmptr++ = (x25->lci >> 0) & 0xFF;
|
|
*asmptr++ = X25_INTERRUPT;
|
|
}
|
|
} else {
|
|
if (x25->neighbour->extended) {
|
|
/* Build an Extended X.25 header */
|
|
asmptr = skb_push(skb, X25_EXT_MIN_LEN);
|
|
*asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
|
|
*asmptr++ = (x25->lci >> 0) & 0xFF;
|
|
*asmptr++ = X25_DATA;
|
|
*asmptr++ = X25_DATA;
|
|
} else {
|
|
/* Build an Standard X.25 header */
|
|
asmptr = skb_push(skb, X25_STD_MIN_LEN);
|
|
*asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
|
|
*asmptr++ = (x25->lci >> 0) & 0xFF;
|
|
*asmptr++ = X25_DATA;
|
|
}
|
|
|
|
if (qbit)
|
|
skb->data[0] |= X25_Q_BIT;
|
|
}
|
|
|
|
SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n");
|
|
SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n");
|
|
|
|
rc = -ENOTCONN;
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
|
goto out_kfree_skb;
|
|
|
|
if (msg->msg_flags & MSG_OOB)
|
|
skb_queue_tail(&x25->interrupt_out_queue, skb);
|
|
else {
|
|
rc = x25_output(sk, skb);
|
|
len = rc;
|
|
if (rc < 0)
|
|
kfree_skb(skb);
|
|
else if (test_bit(X25_Q_BIT_FLAG, &x25->flags))
|
|
len++;
|
|
}
|
|
|
|
x25_kick(sk);
|
|
rc = len;
|
|
out:
|
|
release_sock(sk);
|
|
return rc;
|
|
out_kfree_skb:
|
|
kfree_skb(skb);
|
|
goto out;
|
|
}
|
|
|
|
|
|
static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t size,
|
|
int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct x25_sock *x25 = x25_sk(sk);
|
|
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
|
|
size_t copied;
|
|
int qbit;
|
|
struct sk_buff *skb;
|
|
unsigned char *asmptr;
|
|
int rc = -ENOTCONN;
|
|
|
|
lock_sock(sk);
|
|
/*
|
|
* This works for seqpacket too. The receiver has ordered the queue for
|
|
* us! We do one quick check first though
|
|
*/
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
|
goto out;
|
|
|
|
if (flags & MSG_OOB) {
|
|
rc = -EINVAL;
|
|
if (sock_flag(sk, SOCK_URGINLINE) ||
|
|
!skb_peek(&x25->interrupt_in_queue))
|
|
goto out;
|
|
|
|
skb = skb_dequeue(&x25->interrupt_in_queue);
|
|
|
|
skb_pull(skb, X25_STD_MIN_LEN);
|
|
|
|
/*
|
|
* No Q bit information on Interrupt data.
|
|
*/
|
|
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
|
|
asmptr = skb_push(skb, 1);
|
|
*asmptr = 0x00;
|
|
}
|
|
|
|
msg->msg_flags |= MSG_OOB;
|
|
} else {
|
|
/* Now we can treat all alike */
|
|
release_sock(sk);
|
|
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
|
|
flags & MSG_DONTWAIT, &rc);
|
|
lock_sock(sk);
|
|
if (!skb)
|
|
goto out;
|
|
|
|
qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
|
|
|
|
skb_pull(skb, x25->neighbour->extended ?
|
|
X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
|
|
|
|
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
|
|
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;
|
|
}
|
|
|
|
/* Currently, each datagram always contains a complete record */
|
|
msg->msg_flags |= MSG_EOR;
|
|
|
|
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
|
|
if (rc)
|
|
goto out_free_dgram;
|
|
|
|
if (sx25) {
|
|
sx25->sx25_family = AF_X25;
|
|
sx25->sx25_addr = x25->dest_addr;
|
|
}
|
|
|
|
msg->msg_namelen = sizeof(struct sockaddr_x25);
|
|
|
|
x25_check_rbuf(sk);
|
|
rc = copied;
|
|
out_free_dgram:
|
|
skb_free_datagram(sk, skb);
|
|
out:
|
|
release_sock(sk);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct x25_sock *x25 = x25_sk(sk);
|
|
void __user *argp = (void __user *)arg;
|
|
int rc;
|
|
|
|
switch (cmd) {
|
|
case TIOCOUTQ: {
|
|
int amount;
|
|
|
|
amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
|
|
if (amount < 0)
|
|
amount = 0;
|
|
rc = put_user(amount, (unsigned int __user *)argp);
|
|
break;
|
|
}
|
|
|
|
case TIOCINQ: {
|
|
struct sk_buff *skb;
|
|
int amount = 0;
|
|
/*
|
|
* These two are safe on a single CPU system as
|
|
* only user tasks fiddle here
|
|
*/
|
|
lock_sock(sk);
|
|
if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
|
|
amount = skb->len;
|
|
release_sock(sk);
|
|
rc = put_user(amount, (unsigned int __user *)argp);
|
|
break;
|
|
}
|
|
|
|
case SIOCGSTAMP:
|
|
rc = -EINVAL;
|
|
if (sk)
|
|
rc = sock_get_timestamp(sk,
|
|
(struct timeval __user *)argp);
|
|
break;
|
|
case SIOCGSTAMPNS:
|
|
rc = -EINVAL;
|
|
if (sk)
|
|
rc = sock_get_timestampns(sk,
|
|
(struct timespec __user *)argp);
|
|
break;
|
|
case SIOCGIFADDR:
|
|
case SIOCSIFADDR:
|
|
case SIOCGIFDSTADDR:
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCGIFBRDADDR:
|
|
case SIOCSIFBRDADDR:
|
|
case SIOCGIFNETMASK:
|
|
case SIOCSIFNETMASK:
|
|
case SIOCGIFMETRIC:
|
|
case SIOCSIFMETRIC:
|
|
rc = -EINVAL;
|
|
break;
|
|
case SIOCADDRT:
|
|
case SIOCDELRT:
|
|
rc = -EPERM;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
break;
|
|
rc = x25_route_ioctl(cmd, argp);
|
|
break;
|
|
case SIOCX25GSUBSCRIP:
|
|
rc = x25_subscr_ioctl(cmd, argp);
|
|
break;
|
|
case SIOCX25SSUBSCRIP:
|
|
rc = -EPERM;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
break;
|
|
rc = x25_subscr_ioctl(cmd, argp);
|
|
break;
|
|
case SIOCX25GFACILITIES: {
|
|
lock_sock(sk);
|
|
rc = copy_to_user(argp, &x25->facilities,
|
|
sizeof(x25->facilities))
|
|
? -EFAULT : 0;
|
|
release_sock(sk);
|
|
break;
|
|
}
|
|
|
|
case SIOCX25SFACILITIES: {
|
|
struct x25_facilities facilities;
|
|
rc = -EFAULT;
|
|
if (copy_from_user(&facilities, argp, sizeof(facilities)))
|
|
break;
|
|
rc = -EINVAL;
|
|
lock_sock(sk);
|
|
if (sk->sk_state != TCP_LISTEN &&
|
|
sk->sk_state != TCP_CLOSE)
|
|
goto out_fac_release;
|
|
if (facilities.pacsize_in < X25_PS16 ||
|
|
facilities.pacsize_in > X25_PS4096)
|
|
goto out_fac_release;
|
|
if (facilities.pacsize_out < X25_PS16 ||
|
|
facilities.pacsize_out > X25_PS4096)
|
|
goto out_fac_release;
|
|
if (facilities.winsize_in < 1 ||
|
|
facilities.winsize_in > 127)
|
|
goto out_fac_release;
|
|
if (facilities.throughput) {
|
|
int out = facilities.throughput & 0xf0;
|
|
int in = facilities.throughput & 0x0f;
|
|
if (!out)
|
|
facilities.throughput |=
|
|
X25_DEFAULT_THROUGHPUT << 4;
|
|
else if (out < 0x30 || out > 0xD0)
|
|
goto out_fac_release;
|
|
if (!in)
|
|
facilities.throughput |=
|
|
X25_DEFAULT_THROUGHPUT;
|
|
else if (in < 0x03 || in > 0x0D)
|
|
goto out_fac_release;
|
|
}
|
|
if (facilities.reverse &&
|
|
(facilities.reverse & 0x81) != 0x81)
|
|
goto out_fac_release;
|
|
x25->facilities = facilities;
|
|
rc = 0;
|
|
out_fac_release:
|
|
release_sock(sk);
|
|
break;
|
|
}
|
|
|
|
case SIOCX25GDTEFACILITIES: {
|
|
lock_sock(sk);
|
|
rc = copy_to_user(argp, &x25->dte_facilities,
|
|
sizeof(x25->dte_facilities));
|
|
release_sock(sk);
|
|
if (rc)
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
case SIOCX25SDTEFACILITIES: {
|
|
struct x25_dte_facilities dtefacs;
|
|
rc = -EFAULT;
|
|
if (copy_from_user(&dtefacs, argp, sizeof(dtefacs)))
|
|
break;
|
|
rc = -EINVAL;
|
|
lock_sock(sk);
|
|
if (sk->sk_state != TCP_LISTEN &&
|
|
sk->sk_state != TCP_CLOSE)
|
|
goto out_dtefac_release;
|
|
if (dtefacs.calling_len > X25_MAX_AE_LEN)
|
|
goto out_dtefac_release;
|
|
if (dtefacs.calling_ae == NULL)
|
|
goto out_dtefac_release;
|
|
if (dtefacs.called_len > X25_MAX_AE_LEN)
|
|
goto out_dtefac_release;
|
|
if (dtefacs.called_ae == NULL)
|
|
goto out_dtefac_release;
|
|
x25->dte_facilities = dtefacs;
|
|
rc = 0;
|
|
out_dtefac_release:
|
|
release_sock(sk);
|
|
break;
|
|
}
|
|
|
|
case SIOCX25GCALLUSERDATA: {
|
|
lock_sock(sk);
|
|
rc = copy_to_user(argp, &x25->calluserdata,
|
|
sizeof(x25->calluserdata))
|
|
? -EFAULT : 0;
|
|
release_sock(sk);
|
|
break;
|
|
}
|
|
|
|
case SIOCX25SCALLUSERDATA: {
|
|
struct x25_calluserdata calluserdata;
|
|
|
|
rc = -EFAULT;
|
|
if (copy_from_user(&calluserdata, argp, sizeof(calluserdata)))
|
|
break;
|
|
rc = -EINVAL;
|
|
if (calluserdata.cudlength > X25_MAX_CUD_LEN)
|
|
break;
|
|
lock_sock(sk);
|
|
x25->calluserdata = calluserdata;
|
|
release_sock(sk);
|
|
rc = 0;
|
|
break;
|
|
}
|
|
|
|
case SIOCX25GCAUSEDIAG: {
|
|
lock_sock(sk);
|
|
rc = copy_to_user(argp, &x25->causediag, sizeof(x25->causediag))
|
|
? -EFAULT : 0;
|
|
release_sock(sk);
|
|
break;
|
|
}
|
|
|
|
case SIOCX25SCAUSEDIAG: {
|
|
struct x25_causediag causediag;
|
|
rc = -EFAULT;
|
|
if (copy_from_user(&causediag, argp, sizeof(causediag)))
|
|
break;
|
|
lock_sock(sk);
|
|
x25->causediag = causediag;
|
|
release_sock(sk);
|
|
rc = 0;
|
|
break;
|
|
|
|
}
|
|
|
|
case SIOCX25SCUDMATCHLEN: {
|
|
struct x25_subaddr sub_addr;
|
|
rc = -EINVAL;
|
|
lock_sock(sk);
|
|
if(sk->sk_state != TCP_CLOSE)
|
|
goto out_cud_release;
|
|
rc = -EFAULT;
|
|
if (copy_from_user(&sub_addr, argp,
|
|
sizeof(sub_addr)))
|
|
goto out_cud_release;
|
|
rc = -EINVAL;
|
|
if (sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
|
|
goto out_cud_release;
|
|
x25->cudmatchlength = sub_addr.cudmatchlength;
|
|
rc = 0;
|
|
out_cud_release:
|
|
release_sock(sk);
|
|
break;
|
|
}
|
|
|
|
case SIOCX25CALLACCPTAPPRV: {
|
|
rc = -EINVAL;
|
|
lock_sock(sk);
|
|
if (sk->sk_state != TCP_CLOSE)
|
|
break;
|
|
clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags);
|
|
release_sock(sk);
|
|
rc = 0;
|
|
break;
|
|
}
|
|
|
|
case SIOCX25SENDCALLACCPT: {
|
|
rc = -EINVAL;
|
|
lock_sock(sk);
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
|
break;
|
|
/* must call accptapprv above */
|
|
if (test_bit(X25_ACCPT_APPRV_FLAG, &x25->flags))
|
|
break;
|
|
x25_write_internal(sk, X25_CALL_ACCEPTED);
|
|
x25->state = X25_STATE_3;
|
|
release_sock(sk);
|
|
rc = 0;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
rc = -ENOIOCTLCMD;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static const struct net_proto_family x25_family_ops = {
|
|
.family = AF_X25,
|
|
.create = x25_create,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static int compat_x25_subscr_ioctl(unsigned int cmd,
|
|
struct compat_x25_subscrip_struct __user *x25_subscr32)
|
|
{
|
|
struct compat_x25_subscrip_struct x25_subscr;
|
|
struct x25_neigh *nb;
|
|
struct net_device *dev;
|
|
int rc = -EINVAL;
|
|
|
|
rc = -EFAULT;
|
|
if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32)))
|
|
goto out;
|
|
|
|
rc = -EINVAL;
|
|
dev = x25_dev_get(x25_subscr.device);
|
|
if (dev == NULL)
|
|
goto out;
|
|
|
|
nb = x25_get_neigh(dev);
|
|
if (nb == NULL)
|
|
goto out_dev_put;
|
|
|
|
dev_put(dev);
|
|
|
|
if (cmd == SIOCX25GSUBSCRIP) {
|
|
read_lock_bh(&x25_neigh_list_lock);
|
|
x25_subscr.extended = nb->extended;
|
|
x25_subscr.global_facil_mask = nb->global_facil_mask;
|
|
read_unlock_bh(&x25_neigh_list_lock);
|
|
rc = copy_to_user(x25_subscr32, &x25_subscr,
|
|
sizeof(*x25_subscr32)) ? -EFAULT : 0;
|
|
} else {
|
|
rc = -EINVAL;
|
|
if (x25_subscr.extended == 0 || x25_subscr.extended == 1) {
|
|
rc = 0;
|
|
write_lock_bh(&x25_neigh_list_lock);
|
|
nb->extended = x25_subscr.extended;
|
|
nb->global_facil_mask = x25_subscr.global_facil_mask;
|
|
write_unlock_bh(&x25_neigh_list_lock);
|
|
}
|
|
}
|
|
x25_neigh_put(nb);
|
|
out:
|
|
return rc;
|
|
out_dev_put:
|
|
dev_put(dev);
|
|
goto out;
|
|
}
|
|
|
|
static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
void __user *argp = compat_ptr(arg);
|
|
struct sock *sk = sock->sk;
|
|
|
|
int rc = -ENOIOCTLCMD;
|
|
|
|
switch(cmd) {
|
|
case TIOCOUTQ:
|
|
case TIOCINQ:
|
|
rc = x25_ioctl(sock, cmd, (unsigned long)argp);
|
|
break;
|
|
case SIOCGSTAMP:
|
|
rc = -EINVAL;
|
|
if (sk)
|
|
rc = compat_sock_get_timestamp(sk,
|
|
(struct timeval __user*)argp);
|
|
break;
|
|
case SIOCGSTAMPNS:
|
|
rc = -EINVAL;
|
|
if (sk)
|
|
rc = compat_sock_get_timestampns(sk,
|
|
(struct timespec __user*)argp);
|
|
break;
|
|
case SIOCGIFADDR:
|
|
case SIOCSIFADDR:
|
|
case SIOCGIFDSTADDR:
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCGIFBRDADDR:
|
|
case SIOCSIFBRDADDR:
|
|
case SIOCGIFNETMASK:
|
|
case SIOCSIFNETMASK:
|
|
case SIOCGIFMETRIC:
|
|
case SIOCSIFMETRIC:
|
|
rc = -EINVAL;
|
|
break;
|
|
case SIOCADDRT:
|
|
case SIOCDELRT:
|
|
rc = -EPERM;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
break;
|
|
rc = x25_route_ioctl(cmd, argp);
|
|
break;
|
|
case SIOCX25GSUBSCRIP:
|
|
rc = compat_x25_subscr_ioctl(cmd, argp);
|
|
break;
|
|
case SIOCX25SSUBSCRIP:
|
|
rc = -EPERM;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
break;
|
|
rc = compat_x25_subscr_ioctl(cmd, argp);
|
|
break;
|
|
case SIOCX25GFACILITIES:
|
|
case SIOCX25SFACILITIES:
|
|
case SIOCX25GDTEFACILITIES:
|
|
case SIOCX25SDTEFACILITIES:
|
|
case SIOCX25GCALLUSERDATA:
|
|
case SIOCX25SCALLUSERDATA:
|
|
case SIOCX25GCAUSEDIAG:
|
|
case SIOCX25SCAUSEDIAG:
|
|
case SIOCX25SCUDMATCHLEN:
|
|
case SIOCX25CALLACCPTAPPRV:
|
|
case SIOCX25SENDCALLACCPT:
|
|
rc = x25_ioctl(sock, cmd, (unsigned long)argp);
|
|
break;
|
|
default:
|
|
rc = -ENOIOCTLCMD;
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
#endif
|
|
|
|
static const struct proto_ops x25_proto_ops = {
|
|
.family = AF_X25,
|
|
.owner = THIS_MODULE,
|
|
.release = x25_release,
|
|
.bind = x25_bind,
|
|
.connect = x25_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.accept = x25_accept,
|
|
.getname = x25_getname,
|
|
.poll = datagram_poll,
|
|
.ioctl = x25_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = compat_x25_ioctl,
|
|
#endif
|
|
.listen = x25_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.setsockopt = x25_setsockopt,
|
|
.getsockopt = x25_getsockopt,
|
|
.sendmsg = x25_sendmsg,
|
|
.recvmsg = x25_recvmsg,
|
|
.mmap = sock_no_mmap,
|
|
.sendpage = sock_no_sendpage,
|
|
};
|
|
|
|
static struct packet_type x25_packet_type __read_mostly = {
|
|
.type = cpu_to_be16(ETH_P_X25),
|
|
.func = x25_lapb_receive_frame,
|
|
};
|
|
|
|
static struct notifier_block x25_dev_notifier = {
|
|
.notifier_call = x25_device_event,
|
|
};
|
|
|
|
void x25_kill_by_neigh(struct x25_neigh *nb)
|
|
{
|
|
struct sock *s;
|
|
struct hlist_node *node;
|
|
|
|
write_lock_bh(&x25_list_lock);
|
|
|
|
sk_for_each(s, node, &x25_list)
|
|
if (x25_sk(s)->neighbour == nb)
|
|
x25_disconnect(s, ENETUNREACH, 0, 0);
|
|
|
|
write_unlock_bh(&x25_list_lock);
|
|
|
|
/* Remove any related forwards */
|
|
x25_clear_forward_by_dev(nb->dev);
|
|
}
|
|
|
|
static int __init x25_init(void)
|
|
{
|
|
int rc = proto_register(&x25_proto, 0);
|
|
|
|
if (rc != 0)
|
|
goto out;
|
|
|
|
rc = sock_register(&x25_family_ops);
|
|
if (rc != 0)
|
|
goto out_proto;
|
|
|
|
dev_add_pack(&x25_packet_type);
|
|
|
|
rc = register_netdevice_notifier(&x25_dev_notifier);
|
|
if (rc != 0)
|
|
goto out_sock;
|
|
|
|
printk(KERN_INFO "X.25 for Linux Version 0.2\n");
|
|
|
|
x25_register_sysctl();
|
|
rc = x25_proc_init();
|
|
if (rc != 0)
|
|
goto out_dev;
|
|
out:
|
|
return rc;
|
|
out_dev:
|
|
unregister_netdevice_notifier(&x25_dev_notifier);
|
|
out_sock:
|
|
sock_unregister(AF_X25);
|
|
out_proto:
|
|
proto_unregister(&x25_proto);
|
|
goto out;
|
|
}
|
|
module_init(x25_init);
|
|
|
|
static void __exit x25_exit(void)
|
|
{
|
|
x25_proc_exit();
|
|
x25_link_free();
|
|
x25_route_free();
|
|
|
|
x25_unregister_sysctl();
|
|
|
|
unregister_netdevice_notifier(&x25_dev_notifier);
|
|
|
|
dev_remove_pack(&x25_packet_type);
|
|
|
|
sock_unregister(AF_X25);
|
|
proto_unregister(&x25_proto);
|
|
}
|
|
module_exit(x25_exit);
|
|
|
|
MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
|
|
MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_NETPROTO(PF_X25);
|