1663 lines
38 KiB
C
1663 lines
38 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
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* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
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* Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
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* Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
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*/
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#include <linux/capability.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <linux/stat.h>
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#include <net/net_namespace.h>
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#include <net/ax25.h>
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#include <linux/inet.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 <net/sock.h>
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#include <asm/system.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>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/notifier.h>
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#include <net/rose.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <net/tcp_states.h>
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#include <net/ip.h>
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#include <net/arp.h>
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static int rose_ndevs = 10;
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int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
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int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
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int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
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int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
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int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
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int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
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int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
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int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
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int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
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int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
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static HLIST_HEAD(rose_list);
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static DEFINE_SPINLOCK(rose_list_lock);
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static struct proto_ops rose_proto_ops;
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ax25_address rose_callsign;
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/*
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* ROSE network devices are virtual network devices encapsulating ROSE
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* frames into AX.25 which will be sent through an AX.25 device, so form a
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* special "super class" of normal net devices; split their locks off into a
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* separate class since they always nest.
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*/
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static struct lock_class_key rose_netdev_xmit_lock_key;
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/*
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* Convert a ROSE address into text.
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*/
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const char *rose2asc(const rose_address *addr)
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{
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static char buffer[11];
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if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
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addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
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addr->rose_addr[4] == 0x00) {
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strcpy(buffer, "*");
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} else {
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sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
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addr->rose_addr[1] & 0xFF,
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addr->rose_addr[2] & 0xFF,
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addr->rose_addr[3] & 0xFF,
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addr->rose_addr[4] & 0xFF);
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}
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return buffer;
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}
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/*
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* Compare two ROSE addresses, 0 == equal.
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*/
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int rosecmp(rose_address *addr1, rose_address *addr2)
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{
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int i;
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for (i = 0; i < 5; i++)
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if (addr1->rose_addr[i] != addr2->rose_addr[i])
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return 1;
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return 0;
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}
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/*
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* Compare two ROSE addresses for only mask digits, 0 == equal.
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*/
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int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
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{
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unsigned int i, j;
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if (mask > 10)
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return 1;
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for (i = 0; i < mask; i++) {
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j = i / 2;
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if ((i % 2) != 0) {
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if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
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return 1;
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} else {
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if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
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return 1;
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}
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}
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return 0;
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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 rose_remove_socket(struct sock *sk)
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{
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spin_lock_bh(&rose_list_lock);
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sk_del_node_init(sk);
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spin_unlock_bh(&rose_list_lock);
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}
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/*
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* Kill all bound sockets on a broken link layer connection to a
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* particular neighbour.
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*/
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void rose_kill_by_neigh(struct rose_neigh *neigh)
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{
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struct sock *s;
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struct hlist_node *node;
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spin_lock_bh(&rose_list_lock);
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sk_for_each(s, node, &rose_list) {
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struct rose_sock *rose = rose_sk(s);
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if (rose->neighbour == neigh) {
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rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
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rose->neighbour->use--;
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rose->neighbour = NULL;
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}
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}
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spin_unlock_bh(&rose_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 rose_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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spin_lock_bh(&rose_list_lock);
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sk_for_each(s, node, &rose_list) {
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struct rose_sock *rose = rose_sk(s);
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if (rose->device == dev) {
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rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
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rose->neighbour->use--;
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rose->device = NULL;
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}
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}
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spin_unlock_bh(&rose_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 rose_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 = (struct net_device *)ptr;
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if (dev_net(dev) != &init_net)
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return NOTIFY_DONE;
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if (event != NETDEV_DOWN)
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return NOTIFY_DONE;
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switch (dev->type) {
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case ARPHRD_ROSE:
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rose_kill_by_device(dev);
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break;
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case ARPHRD_AX25:
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rose_link_device_down(dev);
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rose_rt_device_down(dev);
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break;
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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 rose_insert_socket(struct sock *sk)
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{
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spin_lock_bh(&rose_list_lock);
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sk_add_node(sk, &rose_list);
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spin_unlock_bh(&rose_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.
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*/
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static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
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{
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struct sock *s;
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struct hlist_node *node;
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spin_lock_bh(&rose_list_lock);
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sk_for_each(s, node, &rose_list) {
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struct rose_sock *rose = rose_sk(s);
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if (!rosecmp(&rose->source_addr, addr) &&
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!ax25cmp(&rose->source_call, call) &&
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!rose->source_ndigis && s->sk_state == TCP_LISTEN)
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goto found;
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}
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sk_for_each(s, node, &rose_list) {
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struct rose_sock *rose = rose_sk(s);
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if (!rosecmp(&rose->source_addr, addr) &&
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!ax25cmp(&rose->source_call, &null_ax25_address) &&
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s->sk_state == TCP_LISTEN)
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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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spin_unlock_bh(&rose_list_lock);
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return s;
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}
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/*
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* Find a connected ROSE socket given my LCI and device.
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*/
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struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
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{
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struct sock *s;
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struct hlist_node *node;
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spin_lock_bh(&rose_list_lock);
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sk_for_each(s, node, &rose_list) {
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struct rose_sock *rose = rose_sk(s);
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if (rose->lci == lci && rose->neighbour == neigh)
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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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spin_unlock_bh(&rose_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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unsigned int rose_new_lci(struct rose_neigh *neigh)
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{
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int lci;
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if (neigh->dce_mode) {
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for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
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if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
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return lci;
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} else {
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for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
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if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
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return lci;
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}
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return 0;
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}
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/*
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* Deferred destroy.
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*/
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void rose_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 rose_destroy_timer(unsigned long data)
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{
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rose_destroy_socket((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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*/
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void rose_destroy_socket(struct sock *sk)
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{
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struct sk_buff *skb;
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rose_remove_socket(sk);
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rose_stop_heartbeat(sk);
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rose_stop_idletimer(sk);
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rose_stop_timer(sk);
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rose_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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/* Queue the unaccepted socket for death */
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sock_set_flag(skb->sk, SOCK_DEAD);
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rose_start_heartbeat(skb->sk);
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rose_sk(skb->sk)->state = ROSE_STATE_0;
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}
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kfree_skb(skb);
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}
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if (atomic_read(&sk->sk_wmem_alloc) ||
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atomic_read(&sk->sk_rmem_alloc)) {
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/* Defer: outstanding buffers */
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setup_timer(&sk->sk_timer, rose_destroy_timer,
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(unsigned long)sk);
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sk->sk_timer.expires = jiffies + 10 * HZ;
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add_timer(&sk->sk_timer);
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} else
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sock_put(sk);
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}
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/*
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* Handling for system calls applied via the various interfaces to a
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* ROSE socket object.
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*/
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static int rose_setsockopt(struct socket *sock, int level, int optname,
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char __user *optval, int optlen)
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{
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struct sock *sk = sock->sk;
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struct rose_sock *rose = rose_sk(sk);
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int opt;
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if (level != SOL_ROSE)
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return -ENOPROTOOPT;
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if (optlen < sizeof(int))
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return -EINVAL;
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if (get_user(opt, (int __user *)optval))
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return -EFAULT;
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switch (optname) {
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case ROSE_DEFER:
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rose->defer = opt ? 1 : 0;
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return 0;
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case ROSE_T1:
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if (opt < 1)
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return -EINVAL;
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rose->t1 = opt * HZ;
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return 0;
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case ROSE_T2:
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if (opt < 1)
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return -EINVAL;
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rose->t2 = opt * HZ;
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return 0;
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case ROSE_T3:
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if (opt < 1)
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return -EINVAL;
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rose->t3 = opt * HZ;
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return 0;
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case ROSE_HOLDBACK:
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if (opt < 1)
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return -EINVAL;
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rose->hb = opt * HZ;
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return 0;
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case ROSE_IDLE:
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if (opt < 0)
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return -EINVAL;
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rose->idle = opt * 60 * HZ;
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return 0;
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case ROSE_QBITINCL:
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rose->qbitincl = opt ? 1 : 0;
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return 0;
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default:
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return -ENOPROTOOPT;
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}
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}
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static int rose_getsockopt(struct socket *sock, int level, int optname,
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char __user *optval, int __user *optlen)
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{
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struct sock *sk = sock->sk;
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struct rose_sock *rose = rose_sk(sk);
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int val = 0;
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int len;
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if (level != SOL_ROSE)
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return -ENOPROTOOPT;
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if (get_user(len, optlen))
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return -EFAULT;
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if (len < 0)
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return -EINVAL;
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switch (optname) {
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case ROSE_DEFER:
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val = rose->defer;
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break;
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case ROSE_T1:
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val = rose->t1 / HZ;
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break;
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case ROSE_T2:
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val = rose->t2 / HZ;
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break;
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case ROSE_T3:
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val = rose->t3 / HZ;
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break;
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case ROSE_HOLDBACK:
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val = rose->hb / HZ;
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break;
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case ROSE_IDLE:
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val = rose->idle / (60 * HZ);
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break;
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case ROSE_QBITINCL:
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val = rose->qbitincl;
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break;
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default:
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return -ENOPROTOOPT;
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}
|
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|
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len = min_t(unsigned int, len, sizeof(int));
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|
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if (put_user(len, optlen))
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return -EFAULT;
|
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return copy_to_user(optval, &val, len) ? -EFAULT : 0;
|
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}
|
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|
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static int rose_listen(struct socket *sock, int backlog)
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{
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struct sock *sk = sock->sk;
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|
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if (sk->sk_state != TCP_LISTEN) {
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struct rose_sock *rose = rose_sk(sk);
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|
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rose->dest_ndigis = 0;
|
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memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
|
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memset(&rose->dest_call, 0, AX25_ADDR_LEN);
|
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memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
|
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sk->sk_max_ack_backlog = backlog;
|
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sk->sk_state = TCP_LISTEN;
|
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return 0;
|
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}
|
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|
|
return -EOPNOTSUPP;
|
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}
|
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|
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static struct proto rose_proto = {
|
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.name = "ROSE",
|
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.owner = THIS_MODULE,
|
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.obj_size = sizeof(struct rose_sock),
|
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};
|
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|
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static int rose_create(struct net *net, struct socket *sock, int protocol)
|
|
{
|
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struct sock *sk;
|
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struct rose_sock *rose;
|
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|
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if (net != &init_net)
|
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return -EAFNOSUPPORT;
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|
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if (sock->type != SOCK_SEQPACKET || protocol != 0)
|
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return -ESOCKTNOSUPPORT;
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|
|
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sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
|
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if (sk == NULL)
|
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return -ENOMEM;
|
|
|
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rose = rose_sk(sk);
|
|
|
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sock_init_data(sock, sk);
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|
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skb_queue_head_init(&rose->ack_queue);
|
|
#ifdef M_BIT
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skb_queue_head_init(&rose->frag_queue);
|
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rose->fraglen = 0;
|
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#endif
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|
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sock->ops = &rose_proto_ops;
|
|
sk->sk_protocol = protocol;
|
|
|
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init_timer(&rose->timer);
|
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init_timer(&rose->idletimer);
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|
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rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
|
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rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
|
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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;
|
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|
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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_socket = osk->sk_socket;
|
|
sk->sk_priority = osk->sk_priority;
|
|
sk->sk_protocol = osk->sk_protocol;
|
|
sk->sk_rcvbuf = osk->sk_rcvbuf;
|
|
sk->sk_sndbuf = osk->sk_sndbuf;
|
|
sk->sk_state = TCP_ESTABLISHED;
|
|
sk->sk_sleep = osk->sk_sleep;
|
|
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 (addr->srose_ndigis > ROSE_MAX_DIGIS)
|
|
return -EINVAL;
|
|
|
|
if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
|
|
SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
|
|
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);
|
|
SOCK_DEBUG(sk, "ROSE: socket is bound\n");
|
|
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 (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);
|
|
if (!rose->neighbour)
|
|
return -ENETUNREACH;
|
|
|
|
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_try_next_neigh:
|
|
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->sk_sleep, &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->sk_sleep, &wait);
|
|
|
|
if (err)
|
|
goto out_release;
|
|
}
|
|
|
|
if (sk->sk_state != TCP_ESTABLISHED) {
|
|
/* Try next neighbour */
|
|
rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
|
|
if (rose->neighbour)
|
|
goto rose_try_next_neigh;
|
|
|
|
/* No more neighbours */
|
|
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->sk_sleep, &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->sk_sleep, &wait);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
newsk = skb->sk;
|
|
newsk->sk_socket = newsock;
|
|
newsk->sk_sleep = &newsock->wait;
|
|
|
|
/* Now attach up the new socket */
|
|
skb->sk = NULL;
|
|
kfree_skb(skb);
|
|
sk->sk_ack_backlog--;
|
|
newsock->sk = newsk;
|
|
|
|
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;
|
|
|
|
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, len;
|
|
|
|
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));
|
|
|
|
len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
|
|
len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
|
|
if (!rose_parse_facilities(skb->data + len + 4, &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, skb->len);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct rose_sock *rose = rose_sk(sk);
|
|
struct sockaddr_rose *usrose = (struct sockaddr_rose *)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];
|
|
}
|
|
|
|
SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
|
|
|
|
/* Build a packet */
|
|
SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
|
|
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
|
|
*/
|
|
SOCK_DEBUG(sk, "ROSE: Appending user data\n");
|
|
|
|
skb_reset_transport_header(skb);
|
|
skb_put(skb, len);
|
|
|
|
err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, 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);
|
|
|
|
SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
|
|
|
|
/* 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;
|
|
|
|
SOCK_DEBUG(sk, "ROSE: Built header.\n");
|
|
|
|
SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
|
|
|
|
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 kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t size, int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct rose_sock *rose = rose_sk(sk);
|
|
struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
|
|
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_iovec(skb, 0, msg->msg_iov, copied);
|
|
|
|
if (srose != NULL) {
|
|
srose->srose_family = AF_ROSE;
|
|
srose->srose_addr = rose->dest_addr;
|
|
srose->srose_call = rose->dest_call;
|
|
srose->srose_ndigis = rose->dest_ndigis;
|
|
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
|
|
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
|
|
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);
|
|
} else {
|
|
if (rose->dest_ndigis >= 1) {
|
|
srose->srose_ndigis = 1;
|
|
srose->srose_digi = rose->dest_digis[0];
|
|
}
|
|
msg->msg_namelen = sizeof(struct 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 - atomic_read(&sk->sk_wmem_alloc);
|
|
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)
|
|
{
|
|
int i;
|
|
struct sock *s;
|
|
struct hlist_node *node;
|
|
|
|
spin_lock_bh(&rose_list_lock);
|
|
if (*pos == 0)
|
|
return SEQ_START_TOKEN;
|
|
|
|
i = 1;
|
|
sk_for_each(s, node, &rose_list) {
|
|
if (i == *pos)
|
|
return s;
|
|
++i;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
|
|
return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
|
|
: sk_next((struct sock *)v);
|
|
}
|
|
|
|
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];
|
|
|
|
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 = 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(&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(&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),
|
|
atomic_read(&s->sk_wmem_alloc),
|
|
atomic_read(&s->sk_rmem_alloc),
|
|
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 struct net_proto_family rose_family_ops = {
|
|
.family = PF_ROSE,
|
|
.create = rose_create,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static 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(sizeof(struct net_device_stats),
|
|
name, 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;
|
|
}
|
|
lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
|
|
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_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
|
|
proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
|
|
proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
|
|
proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &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;
|
|
|
|
proc_net_remove(&init_net, "rose");
|
|
proc_net_remove(&init_net, "rose_neigh");
|
|
proc_net_remove(&init_net, "rose_nodes");
|
|
proc_net_remove(&init_net, "rose_routes");
|
|
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);
|