Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /********************************************************************* |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 2 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Filename: ircomm_core.c |
| 4 | * Version: 1.0 |
| 5 | * Description: IrCOMM service interface |
| 6 | * Status: Experimental. |
| 7 | * Author: Dag Brattli <dagb@cs.uit.no> |
| 8 | * Created at: Sun Jun 6 20:37:34 1999 |
| 9 | * Modified at: Tue Dec 21 13:26:41 1999 |
| 10 | * Modified by: Dag Brattli <dagb@cs.uit.no> |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 11 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * Copyright (c) 1999 Dag Brattli, All Rights Reserved. |
| 13 | * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 14 | * |
| 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License as |
| 17 | * published by the Free Software Foundation; either version 2 of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * the License, or (at your option) any later version. |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 19 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, write to the Free Software |
| 27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | * MA 02111-1307 USA |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 29 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | ********************************************************************/ |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/proc_fs.h> |
| 34 | #include <linux/seq_file.h> |
| 35 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | #include <net/irda/irda.h> |
| 39 | #include <net/irda/irmod.h> |
| 40 | #include <net/irda/irlmp.h> |
| 41 | #include <net/irda/iriap.h> |
| 42 | #include <net/irda/irttp.h> |
| 43 | #include <net/irda/irias_object.h> |
| 44 | |
| 45 | #include <net/irda/ircomm_event.h> |
| 46 | #include <net/irda/ircomm_lmp.h> |
| 47 | #include <net/irda/ircomm_ttp.h> |
| 48 | #include <net/irda/ircomm_param.h> |
| 49 | #include <net/irda/ircomm_core.h> |
| 50 | |
| 51 | static int __ircomm_close(struct ircomm_cb *self); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 52 | static void ircomm_control_indication(struct ircomm_cb *self, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | struct sk_buff *skb, int clen); |
| 54 | |
| 55 | #ifdef CONFIG_PROC_FS |
| 56 | extern struct proc_dir_entry *proc_irda; |
| 57 | static int ircomm_seq_open(struct inode *, struct file *); |
| 58 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 59 | static const struct file_operations ircomm_proc_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | .owner = THIS_MODULE, |
| 61 | .open = ircomm_seq_open, |
| 62 | .read = seq_read, |
| 63 | .llseek = seq_lseek, |
| 64 | .release = seq_release, |
| 65 | }; |
| 66 | #endif /* CONFIG_PROC_FS */ |
| 67 | |
| 68 | hashbin_t *ircomm = NULL; |
| 69 | |
| 70 | static int __init ircomm_init(void) |
| 71 | { |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 72 | ircomm = hashbin_new(HB_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | if (ircomm == NULL) { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 74 | IRDA_ERROR("%s(), can't allocate hashbin!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | return -ENOMEM; |
| 76 | } |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #ifdef CONFIG_PROC_FS |
| 79 | { struct proc_dir_entry *ent; |
Wang Chen | 5e47879 | 2008-02-29 10:34:45 -0800 | [diff] [blame] | 80 | ent = proc_create("ircomm", 0, proc_irda, &ircomm_proc_fops); |
| 81 | if (!ent) { |
| 82 | printk(KERN_ERR "ircomm_init: can't create /proc entry!\n"); |
| 83 | return -ENODEV; |
| 84 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } |
| 86 | #endif /* CONFIG_PROC_FS */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | IRDA_MESSAGE("IrCOMM protocol (Dag Brattli)\n"); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | static void __exit ircomm_cleanup(void) |
| 94 | { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 95 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | hashbin_delete(ircomm, (FREE_FUNC) __ircomm_close); |
| 98 | |
| 99 | #ifdef CONFIG_PROC_FS |
| 100 | remove_proc_entry("ircomm", proc_irda); |
| 101 | #endif /* CONFIG_PROC_FS */ |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Function ircomm_open (client_notify) |
| 106 | * |
| 107 | * Start a new IrCOMM instance |
| 108 | * |
| 109 | */ |
| 110 | struct ircomm_cb *ircomm_open(notify_t *notify, __u8 service_type, int line) |
| 111 | { |
| 112 | struct ircomm_cb *self = NULL; |
| 113 | int ret; |
| 114 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 115 | IRDA_DEBUG(2, "%s(), service_type=0x%02x\n", __func__ , |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | service_type); |
| 117 | |
| 118 | IRDA_ASSERT(ircomm != NULL, return NULL;); |
| 119 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 120 | self = kzalloc(sizeof(struct ircomm_cb), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | if (self == NULL) |
| 122 | return NULL; |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | self->notify = *notify; |
| 125 | self->magic = IRCOMM_MAGIC; |
| 126 | |
| 127 | /* Check if we should use IrLMP or IrTTP */ |
| 128 | if (service_type & IRCOMM_3_WIRE_RAW) { |
| 129 | self->flow_status = FLOW_START; |
| 130 | ret = ircomm_open_lsap(self); |
| 131 | } else |
| 132 | ret = ircomm_open_tsap(self); |
| 133 | |
| 134 | if (ret < 0) { |
| 135 | kfree(self); |
| 136 | return NULL; |
| 137 | } |
| 138 | |
| 139 | self->service_type = service_type; |
| 140 | self->line = line; |
| 141 | |
| 142 | hashbin_insert(ircomm, (irda_queue_t *) self, line, NULL); |
| 143 | |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 144 | ircomm_next_state(self, IRCOMM_IDLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | return self; |
| 147 | } |
| 148 | |
| 149 | EXPORT_SYMBOL(ircomm_open); |
| 150 | |
| 151 | /* |
| 152 | * Function ircomm_close_instance (self) |
| 153 | * |
| 154 | * Remove IrCOMM instance |
| 155 | * |
| 156 | */ |
| 157 | static int __ircomm_close(struct ircomm_cb *self) |
| 158 | { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 159 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
| 161 | /* Disconnect link if any */ |
| 162 | ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, NULL, NULL); |
| 163 | |
| 164 | /* Remove TSAP */ |
| 165 | if (self->tsap) { |
| 166 | irttp_close_tsap(self->tsap); |
| 167 | self->tsap = NULL; |
| 168 | } |
| 169 | |
| 170 | /* Remove LSAP */ |
| 171 | if (self->lsap) { |
| 172 | irlmp_close_lsap(self->lsap); |
| 173 | self->lsap = NULL; |
| 174 | } |
| 175 | self->magic = 0; |
| 176 | |
| 177 | kfree(self); |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Function ircomm_close (self) |
| 184 | * |
| 185 | * Closes and removes the specified IrCOMM instance |
| 186 | * |
| 187 | */ |
| 188 | int ircomm_close(struct ircomm_cb *self) |
| 189 | { |
| 190 | struct ircomm_cb *entry; |
| 191 | |
| 192 | IRDA_ASSERT(self != NULL, return -EIO;); |
| 193 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;); |
| 194 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 195 | IRDA_DEBUG(0, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | entry = hashbin_remove(ircomm, self->line, NULL); |
| 198 | |
| 199 | IRDA_ASSERT(entry == self, return -1;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 200 | |
| 201 | return __ircomm_close(self); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | EXPORT_SYMBOL(ircomm_close); |
| 205 | |
| 206 | /* |
| 207 | * Function ircomm_connect_request (self, service_type) |
| 208 | * |
| 209 | * Impl. of this function is differ from one of the reference. This |
| 210 | * function does discovery as well as sending connect request |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 211 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 213 | int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | __u32 saddr, __u32 daddr, struct sk_buff *skb, |
| 215 | __u8 service_type) |
| 216 | { |
| 217 | struct ircomm_info info; |
| 218 | int ret; |
| 219 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 220 | IRDA_DEBUG(2 , "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
| 222 | IRDA_ASSERT(self != NULL, return -1;); |
| 223 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); |
| 224 | |
| 225 | self->service_type= service_type; |
| 226 | |
| 227 | info.dlsap_sel = dlsap_sel; |
| 228 | info.saddr = saddr; |
| 229 | info.daddr = daddr; |
| 230 | |
| 231 | ret = ircomm_do_event(self, IRCOMM_CONNECT_REQUEST, skb, &info); |
| 232 | |
| 233 | return ret; |
| 234 | } |
| 235 | |
| 236 | EXPORT_SYMBOL(ircomm_connect_request); |
| 237 | |
| 238 | /* |
| 239 | * Function ircomm_connect_indication (self, qos, skb) |
| 240 | * |
| 241 | * Notify user layer about the incoming connection |
| 242 | * |
| 243 | */ |
| 244 | void ircomm_connect_indication(struct ircomm_cb *self, struct sk_buff *skb, |
| 245 | struct ircomm_info *info) |
| 246 | { |
| 247 | int clen = 0; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 248 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 249 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | /* Check if the packet contains data on the control channel */ |
| 252 | if (skb->len > 0) |
| 253 | clen = skb->data[0]; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 254 | |
| 255 | /* |
| 256 | * If there are any data hiding in the control channel, we must |
| 257 | * deliver it first. The side effect is that the control channel |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | * will be removed from the skb |
| 259 | */ |
| 260 | if (self->notify.connect_indication) |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 261 | self->notify.connect_indication(self->notify.instance, self, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | info->qos, info->max_data_size, |
| 263 | info->max_header_size, skb); |
| 264 | else { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 265 | IRDA_DEBUG(0, "%s(), missing handler\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Function ircomm_connect_response (self, userdata, max_sdu_size) |
| 271 | * |
| 272 | * User accepts connection |
| 273 | * |
| 274 | */ |
| 275 | int ircomm_connect_response(struct ircomm_cb *self, struct sk_buff *userdata) |
| 276 | { |
| 277 | int ret; |
| 278 | |
| 279 | IRDA_ASSERT(self != NULL, return -1;); |
| 280 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); |
| 281 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 282 | IRDA_DEBUG(4, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
| 284 | ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL); |
| 285 | |
| 286 | return ret; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 287 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
| 289 | EXPORT_SYMBOL(ircomm_connect_response); |
| 290 | |
| 291 | /* |
| 292 | * Function connect_confirm (self, skb) |
| 293 | * |
| 294 | * Notify user layer that the link is now connected |
| 295 | * |
| 296 | */ |
| 297 | void ircomm_connect_confirm(struct ircomm_cb *self, struct sk_buff *skb, |
| 298 | struct ircomm_info *info) |
| 299 | { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 300 | IRDA_DEBUG(4, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | if (self->notify.connect_confirm ) |
| 303 | self->notify.connect_confirm(self->notify.instance, |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 304 | self, info->qos, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | info->max_data_size, |
| 306 | info->max_header_size, skb); |
| 307 | else { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 308 | IRDA_DEBUG(0, "%s(), missing handler\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | } |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | * Function ircomm_data_request (self, userdata) |
| 314 | * |
| 315 | * Send IrCOMM data to peer device |
| 316 | * |
| 317 | */ |
| 318 | int ircomm_data_request(struct ircomm_cb *self, struct sk_buff *skb) |
| 319 | { |
| 320 | int ret; |
| 321 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 322 | IRDA_DEBUG(4, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | IRDA_ASSERT(self != NULL, return -EFAULT;); |
| 325 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;); |
| 326 | IRDA_ASSERT(skb != NULL, return -EFAULT;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL); |
| 329 | |
| 330 | return ret; |
| 331 | } |
| 332 | |
| 333 | EXPORT_SYMBOL(ircomm_data_request); |
| 334 | |
| 335 | /* |
| 336 | * Function ircomm_data_indication (self, skb) |
| 337 | * |
| 338 | * Data arrived, so deliver it to user |
| 339 | * |
| 340 | */ |
| 341 | void ircomm_data_indication(struct ircomm_cb *self, struct sk_buff *skb) |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 342 | { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 343 | IRDA_DEBUG(4, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
| 345 | IRDA_ASSERT(skb->len > 0, return;); |
| 346 | |
| 347 | if (self->notify.data_indication) |
| 348 | self->notify.data_indication(self->notify.instance, self, skb); |
| 349 | else { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 350 | IRDA_DEBUG(0, "%s(), missing handler\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * Function ircomm_process_data (self, skb) |
| 356 | * |
| 357 | * Data arrived which may contain control channel data |
| 358 | * |
| 359 | */ |
| 360 | void ircomm_process_data(struct ircomm_cb *self, struct sk_buff *skb) |
| 361 | { |
| 362 | int clen; |
| 363 | |
| 364 | IRDA_ASSERT(skb->len > 0, return;); |
| 365 | |
| 366 | clen = skb->data[0]; |
| 367 | |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 368 | /* |
Robie Basak | 5d780cd | 2008-01-18 23:58:44 -0800 | [diff] [blame] | 369 | * Input validation check: a stir4200/mcp2150 combinations sometimes |
| 370 | * results in frames with clen > remaining packet size. These are |
| 371 | * illegal; if we throw away just this frame then it seems to carry on |
| 372 | * fine |
| 373 | */ |
| 374 | if (unlikely(skb->len < (clen + 1))) { |
| 375 | IRDA_DEBUG(2, "%s() throwing away illegal frame\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 376 | __func__ ); |
Robie Basak | 5d780cd | 2008-01-18 23:58:44 -0800 | [diff] [blame] | 377 | return; |
| 378 | } |
| 379 | |
| 380 | /* |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 381 | * If there are any data hiding in the control channel, we must |
| 382 | * deliver it first. The side effect is that the control channel |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | * will be removed from the skb |
| 384 | */ |
| 385 | if (clen > 0) |
| 386 | ircomm_control_indication(self, skb, clen); |
| 387 | |
| 388 | /* Remove control channel from data channel */ |
| 389 | skb_pull(skb, clen+1); |
| 390 | |
| 391 | if (skb->len) |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 392 | ircomm_data_indication(self, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | else { |
| 394 | IRDA_DEBUG(4, "%s(), data was control info only!\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 395 | __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Function ircomm_control_request (self, params) |
| 401 | * |
| 402 | * Send control data to peer device |
| 403 | * |
| 404 | */ |
| 405 | int ircomm_control_request(struct ircomm_cb *self, struct sk_buff *skb) |
| 406 | { |
| 407 | int ret; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 408 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 409 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
| 411 | IRDA_ASSERT(self != NULL, return -EFAULT;); |
| 412 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;); |
| 413 | IRDA_ASSERT(skb != NULL, return -EFAULT;); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL); |
| 416 | |
| 417 | return ret; |
| 418 | } |
| 419 | |
| 420 | EXPORT_SYMBOL(ircomm_control_request); |
| 421 | |
| 422 | /* |
| 423 | * Function ircomm_control_indication (self, skb) |
| 424 | * |
| 425 | * Data has arrived on the control channel |
| 426 | * |
| 427 | */ |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 428 | static void ircomm_control_indication(struct ircomm_cb *self, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | struct sk_buff *skb, int clen) |
| 430 | { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 431 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | /* Use udata for delivering data on the control channel */ |
| 434 | if (self->notify.udata_indication) { |
| 435 | struct sk_buff *ctrl_skb; |
| 436 | |
| 437 | /* We don't own the skb, so clone it */ |
| 438 | ctrl_skb = skb_clone(skb, GFP_ATOMIC); |
| 439 | if (!ctrl_skb) |
| 440 | return; |
| 441 | |
| 442 | /* Remove data channel from control channel */ |
| 443 | skb_trim(ctrl_skb, clen+1); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 444 | |
| 445 | self->notify.udata_indication(self->notify.instance, self, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | ctrl_skb); |
| 447 | |
| 448 | /* Drop reference count - |
| 449 | * see ircomm_tty_control_indication(). */ |
| 450 | dev_kfree_skb(ctrl_skb); |
| 451 | } else { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 452 | IRDA_DEBUG(0, "%s(), missing handler\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } |
| 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Function ircomm_disconnect_request (self, userdata, priority) |
| 458 | * |
| 459 | * User layer wants to disconnect the IrCOMM connection |
| 460 | * |
| 461 | */ |
| 462 | int ircomm_disconnect_request(struct ircomm_cb *self, struct sk_buff *userdata) |
| 463 | { |
| 464 | struct ircomm_info info; |
| 465 | int ret; |
| 466 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 467 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
| 469 | IRDA_ASSERT(self != NULL, return -1;); |
| 470 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); |
| 471 | |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 472 | ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | &info); |
| 474 | return ret; |
| 475 | } |
| 476 | |
| 477 | EXPORT_SYMBOL(ircomm_disconnect_request); |
| 478 | |
| 479 | /* |
| 480 | * Function disconnect_indication (self, skb) |
| 481 | * |
| 482 | * Tell user that the link has been disconnected |
| 483 | * |
| 484 | */ |
| 485 | void ircomm_disconnect_indication(struct ircomm_cb *self, struct sk_buff *skb, |
| 486 | struct ircomm_info *info) |
| 487 | { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 488 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | IRDA_ASSERT(info != NULL, return;); |
| 491 | |
| 492 | if (self->notify.disconnect_indication) { |
| 493 | self->notify.disconnect_indication(self->notify.instance, self, |
| 494 | info->reason, skb); |
| 495 | } else { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 496 | IRDA_DEBUG(0, "%s(), missing handler\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | } |
| 499 | |
| 500 | /* |
| 501 | * Function ircomm_flow_request (self, flow) |
| 502 | * |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 503 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | * |
| 505 | */ |
| 506 | void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow) |
| 507 | { |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 508 | IRDA_DEBUG(2, "%s()\n", __func__ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
| 510 | IRDA_ASSERT(self != NULL, return;); |
| 511 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); |
| 512 | |
| 513 | if (self->service_type == IRCOMM_3_WIRE_RAW) |
| 514 | return; |
| 515 | |
| 516 | irttp_flow_request(self->tsap, flow); |
| 517 | } |
| 518 | |
| 519 | EXPORT_SYMBOL(ircomm_flow_request); |
| 520 | |
| 521 | #ifdef CONFIG_PROC_FS |
| 522 | static void *ircomm_seq_start(struct seq_file *seq, loff_t *pos) |
| 523 | { |
| 524 | struct ircomm_cb *self; |
| 525 | loff_t off = 0; |
| 526 | |
| 527 | spin_lock_irq(&ircomm->hb_spinlock); |
| 528 | |
| 529 | for (self = (struct ircomm_cb *) hashbin_get_first(ircomm); |
| 530 | self != NULL; |
| 531 | self = (struct ircomm_cb *) hashbin_get_next(ircomm)) { |
| 532 | if (off++ == *pos) |
| 533 | break; |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
| 536 | return self; |
| 537 | } |
| 538 | |
| 539 | static void *ircomm_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 540 | { |
| 541 | ++*pos; |
| 542 | |
| 543 | return (void *) hashbin_get_next(ircomm); |
| 544 | } |
| 545 | |
| 546 | static void ircomm_seq_stop(struct seq_file *seq, void *v) |
| 547 | { |
| 548 | spin_unlock_irq(&ircomm->hb_spinlock); |
| 549 | } |
| 550 | |
| 551 | static int ircomm_seq_show(struct seq_file *seq, void *v) |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 552 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | const struct ircomm_cb *self = v; |
| 554 | |
| 555 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EINVAL; ); |
| 556 | |
| 557 | if(self->line < 0x10) |
| 558 | seq_printf(seq, "ircomm%d", self->line); |
| 559 | else |
| 560 | seq_printf(seq, "irlpt%d", self->line - 0x10); |
| 561 | |
| 562 | seq_printf(seq, |
| 563 | " state: %s, slsap_sel: %#02x, dlsap_sel: %#02x, mode:", |
| 564 | ircomm_state[ self->state], |
YOSHIFUJI Hideaki | 6819bc2 | 2007-02-09 23:24:53 +0900 | [diff] [blame] | 565 | self->slsap_sel, self->dlsap_sel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | if(self->service_type & IRCOMM_3_WIRE_RAW) |
| 568 | seq_printf(seq, " 3-wire-raw"); |
| 569 | if(self->service_type & IRCOMM_3_WIRE) |
| 570 | seq_printf(seq, " 3-wire"); |
| 571 | if(self->service_type & IRCOMM_9_WIRE) |
| 572 | seq_printf(seq, " 9-wire"); |
| 573 | if(self->service_type & IRCOMM_CENTRONICS) |
| 574 | seq_printf(seq, " Centronics"); |
| 575 | seq_putc(seq, '\n'); |
| 576 | |
| 577 | return 0; |
| 578 | } |
| 579 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 580 | static const struct seq_operations ircomm_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | .start = ircomm_seq_start, |
| 582 | .next = ircomm_seq_next, |
| 583 | .stop = ircomm_seq_stop, |
| 584 | .show = ircomm_seq_show, |
| 585 | }; |
| 586 | |
| 587 | static int ircomm_seq_open(struct inode *inode, struct file *file) |
| 588 | { |
| 589 | return seq_open(file, &ircomm_seq_ops); |
| 590 | } |
| 591 | #endif /* CONFIG_PROC_FS */ |
| 592 | |
| 593 | MODULE_AUTHOR("Dag Brattli <dag@brattli.net>"); |
| 594 | MODULE_DESCRIPTION("IrCOMM protocol"); |
| 595 | MODULE_LICENSE("GPL"); |
| 596 | |
| 597 | module_init(ircomm_init); |
| 598 | module_exit(ircomm_cleanup); |