11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (at your option) any later version. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/socket.h> 125a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/in.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/timer.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sockios.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/net.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/spinlock.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/ax25.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/inet.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netdevice.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/if_arp.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/skbuff.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/sock.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fcntl.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsax25_dev *ax25_dev_list; 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDEFINE_SPINLOCK(ax25_dev_lock); 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsax25_dev *ax25_addr_ax25dev(ax25_address *addr) 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev *ax25_dev, *res = NULL; 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(&ax25_dev_lock); 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) { 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = ax25_dev; 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(&ax25_dev_lock); 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called when an interface is brought up. These are 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * reasonable defaults. 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid ax25_dev_device_up(struct net_device *dev) 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev *ax25_dev; 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571b30dd359ebec22d035e8b145751319f63772ca1Ralf Baechle if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) { 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n"); 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->ax25_ptr = ax25_dev; 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->dev = dev; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_hold(dev); 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->forward = NULL; 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE; 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE; 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW; 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW; 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2; 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN; 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL; 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT; 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) 83e848b583e03306f5f9b3a66a793c37e3649e04caJarek Poplawski ax25_ds_setup_timer(ax25_dev); 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(&ax25_dev_lock); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->next = ax25_dev_list; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev_list = ax25_dev; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(&ax25_dev_lock); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 910ca7a4c87d27dd2fde0783dec94a821d6d035696Eric W. Biederman ax25_register_dev_sysctl(ax25_dev); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid ax25_dev_device_down(struct net_device *dev) 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev *s, *ax25_dev; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1010ca7a4c87d27dd2fde0783dec94a821d6d035696Eric W. Biederman ax25_unregister_dev_sysctl(ax25_dev); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(&ax25_dev_lock); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_AX25_DAMA_SLAVE 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_ds_del_timer(ax25_dev); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Remove any packet forwarding that points to this device. 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (s = ax25_dev_list; s != NULL; s = s->next) 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (s->forward == dev) 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s->forward = NULL; 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((s = ax25_dev_list) == ax25_dev) { 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev_list = s->next; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(&ax25_dev_lock); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_put(dev); 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ax25_dev); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (s != NULL && s->next != NULL) { 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (s->next == ax25_dev) { 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s->next = ax25_dev->next; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(&ax25_dev_lock); 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_put(dev); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(ax25_dev); 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s = s->next; 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(&ax25_dev_lock); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->ax25_ptr = NULL; 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd) 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev *ax25_dev, *fwd_dev; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL) 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (cmd) { 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SIOCAX25ADDFWD: 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL) 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ax25_dev->forward != NULL) 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->forward = fwd_dev->dev; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SIOCAX25DELFWD: 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ax25_dev->forward == NULL) 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev->forward = NULL; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct net_device *ax25_fwd_dev(struct net_device *dev) 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev *ax25_dev; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return dev; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ax25_dev->forward == NULL) 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return dev; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ax25_dev->forward; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free all memory associated with device structures. 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __exit ax25_dev_free(void) 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev *s, *ax25_dev; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(&ax25_dev_lock); 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev = ax25_dev_list; 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (ax25_dev != NULL) { 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s = ax25_dev; 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_put(ax25_dev->dev); 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev = ax25_dev->next; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(s); 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ax25_dev_list = NULL; 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(&ax25_dev_lock); 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 199