+++ /dev/null
-/*********************************************************************
- *
- * Filename: ircomm_core.c
- * Version: 1.0
- * Description: IrCOMM service interface
- * Status: Experimental.
- * Author: Dag Brattli <dagb@cs.uit.no>
- * Created at: Sun Jun 6 20:37:34 1999
- * Modified at: Tue Dec 21 13:26:41 1999
- * Modified by: Dag Brattli <dagb@cs.uit.no>
- *
- * Copyright (c) 1999 Dag Brattli, All Rights Reserved.
- * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- ********************************************************************/
-
-#include <linux/module.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-
-#include <net/irda/irda.h>
-#include <net/irda/irmod.h>
-#include <net/irda/irlmp.h>
-#include <net/irda/iriap.h>
-#include <net/irda/irttp.h>
-#include <net/irda/irias_object.h>
-
-#include <net/irda/ircomm_event.h>
-#include <net/irda/ircomm_lmp.h>
-#include <net/irda/ircomm_ttp.h>
-#include <net/irda/ircomm_param.h>
-#include <net/irda/ircomm_core.h>
-
-static int __ircomm_close(struct ircomm_cb *self);
-static void ircomm_control_indication(struct ircomm_cb *self,
- struct sk_buff *skb, int clen);
-
-#ifdef CONFIG_PROC_FS
-extern struct proc_dir_entry *proc_irda;
-static int ircomm_seq_open(struct inode *, struct file *);
-
-static const struct file_operations ircomm_proc_fops = {
- .owner = THIS_MODULE,
- .open = ircomm_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-#endif /* CONFIG_PROC_FS */
-
-hashbin_t *ircomm = NULL;
-
-static int __init ircomm_init(void)
-{
- ircomm = hashbin_new(HB_LOCK);
- if (ircomm == NULL) {
- net_err_ratelimited("%s(), can't allocate hashbin!\n",
- __func__);
- return -ENOMEM;
- }
-
-#ifdef CONFIG_PROC_FS
- { struct proc_dir_entry *ent;
- ent = proc_create("ircomm", 0, proc_irda, &ircomm_proc_fops);
- if (!ent) {
- printk(KERN_ERR "ircomm_init: can't create /proc entry!\n");
- return -ENODEV;
- }
- }
-#endif /* CONFIG_PROC_FS */
-
- net_info_ratelimited("IrCOMM protocol (Dag Brattli)\n");
-
- return 0;
-}
-
-static void __exit ircomm_cleanup(void)
-{
- hashbin_delete(ircomm, (FREE_FUNC) __ircomm_close);
-
-#ifdef CONFIG_PROC_FS
- remove_proc_entry("ircomm", proc_irda);
-#endif /* CONFIG_PROC_FS */
-}
-
-/*
- * Function ircomm_open (client_notify)
- *
- * Start a new IrCOMM instance
- *
- */
-struct ircomm_cb *ircomm_open(notify_t *notify, __u8 service_type, int line)
-{
- struct ircomm_cb *self = NULL;
- int ret;
-
- pr_debug("%s(), service_type=0x%02x\n", __func__ ,
- service_type);
-
- IRDA_ASSERT(ircomm != NULL, return NULL;);
-
- self = kzalloc(sizeof(struct ircomm_cb), GFP_KERNEL);
- if (self == NULL)
- return NULL;
-
- self->notify = *notify;
- self->magic = IRCOMM_MAGIC;
-
- /* Check if we should use IrLMP or IrTTP */
- if (service_type & IRCOMM_3_WIRE_RAW) {
- self->flow_status = FLOW_START;
- ret = ircomm_open_lsap(self);
- } else
- ret = ircomm_open_tsap(self);
-
- if (ret < 0) {
- kfree(self);
- return NULL;
- }
-
- self->service_type = service_type;
- self->line = line;
-
- hashbin_insert(ircomm, (irda_queue_t *) self, line, NULL);
-
- ircomm_next_state(self, IRCOMM_IDLE);
-
- return self;
-}
-
-EXPORT_SYMBOL(ircomm_open);
-
-/*
- * Function ircomm_close_instance (self)
- *
- * Remove IrCOMM instance
- *
- */
-static int __ircomm_close(struct ircomm_cb *self)
-{
- /* Disconnect link if any */
- ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, NULL, NULL);
-
- /* Remove TSAP */
- if (self->tsap) {
- irttp_close_tsap(self->tsap);
- self->tsap = NULL;
- }
-
- /* Remove LSAP */
- if (self->lsap) {
- irlmp_close_lsap(self->lsap);
- self->lsap = NULL;
- }
- self->magic = 0;
-
- kfree(self);
-
- return 0;
-}
-
-/*
- * Function ircomm_close (self)
- *
- * Closes and removes the specified IrCOMM instance
- *
- */
-int ircomm_close(struct ircomm_cb *self)
-{
- struct ircomm_cb *entry;
-
- IRDA_ASSERT(self != NULL, return -EIO;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;);
-
- entry = hashbin_remove(ircomm, self->line, NULL);
-
- IRDA_ASSERT(entry == self, return -1;);
-
- return __ircomm_close(self);
-}
-
-EXPORT_SYMBOL(ircomm_close);
-
-/*
- * Function ircomm_connect_request (self, service_type)
- *
- * Impl. of this function is differ from one of the reference. This
- * function does discovery as well as sending connect request
- *
- */
-int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel,
- __u32 saddr, __u32 daddr, struct sk_buff *skb,
- __u8 service_type)
-{
- struct ircomm_info info;
- int ret;
-
- IRDA_ASSERT(self != NULL, return -1;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
-
- self->service_type= service_type;
-
- info.dlsap_sel = dlsap_sel;
- info.saddr = saddr;
- info.daddr = daddr;
-
- ret = ircomm_do_event(self, IRCOMM_CONNECT_REQUEST, skb, &info);
-
- return ret;
-}
-
-EXPORT_SYMBOL(ircomm_connect_request);
-
-/*
- * Function ircomm_connect_indication (self, qos, skb)
- *
- * Notify user layer about the incoming connection
- *
- */
-void ircomm_connect_indication(struct ircomm_cb *self, struct sk_buff *skb,
- struct ircomm_info *info)
-{
- /*
- * If there are any data hiding in the control channel, we must
- * deliver it first. The side effect is that the control channel
- * will be removed from the skb
- */
- if (self->notify.connect_indication)
- self->notify.connect_indication(self->notify.instance, self,
- info->qos, info->max_data_size,
- info->max_header_size, skb);
- else {
- pr_debug("%s(), missing handler\n", __func__);
- }
-}
-
-/*
- * Function ircomm_connect_response (self, userdata, max_sdu_size)
- *
- * User accepts connection
- *
- */
-int ircomm_connect_response(struct ircomm_cb *self, struct sk_buff *userdata)
-{
- int ret;
-
- IRDA_ASSERT(self != NULL, return -1;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
-
- ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL);
-
- return ret;
-}
-
-EXPORT_SYMBOL(ircomm_connect_response);
-
-/*
- * Function connect_confirm (self, skb)
- *
- * Notify user layer that the link is now connected
- *
- */
-void ircomm_connect_confirm(struct ircomm_cb *self, struct sk_buff *skb,
- struct ircomm_info *info)
-{
- if (self->notify.connect_confirm )
- self->notify.connect_confirm(self->notify.instance,
- self, info->qos,
- info->max_data_size,
- info->max_header_size, skb);
- else {
- pr_debug("%s(), missing handler\n", __func__);
- }
-}
-
-/*
- * Function ircomm_data_request (self, userdata)
- *
- * Send IrCOMM data to peer device
- *
- */
-int ircomm_data_request(struct ircomm_cb *self, struct sk_buff *skb)
-{
- int ret;
-
- IRDA_ASSERT(self != NULL, return -EFAULT;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
- IRDA_ASSERT(skb != NULL, return -EFAULT;);
-
- ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL);
-
- return ret;
-}
-
-EXPORT_SYMBOL(ircomm_data_request);
-
-/*
- * Function ircomm_data_indication (self, skb)
- *
- * Data arrived, so deliver it to user
- *
- */
-void ircomm_data_indication(struct ircomm_cb *self, struct sk_buff *skb)
-{
- IRDA_ASSERT(skb->len > 0, return;);
-
- if (self->notify.data_indication)
- self->notify.data_indication(self->notify.instance, self, skb);
- else {
- pr_debug("%s(), missing handler\n", __func__);
- }
-}
-
-/*
- * Function ircomm_process_data (self, skb)
- *
- * Data arrived which may contain control channel data
- *
- */
-void ircomm_process_data(struct ircomm_cb *self, struct sk_buff *skb)
-{
- int clen;
-
- IRDA_ASSERT(skb->len > 0, return;);
-
- clen = skb->data[0];
-
- /*
- * Input validation check: a stir4200/mcp2150 combinations sometimes
- * results in frames with clen > remaining packet size. These are
- * illegal; if we throw away just this frame then it seems to carry on
- * fine
- */
- if (unlikely(skb->len < (clen + 1))) {
- pr_debug("%s() throwing away illegal frame\n",
- __func__);
- return;
- }
-
- /*
- * If there are any data hiding in the control channel, we must
- * deliver it first. The side effect is that the control channel
- * will be removed from the skb
- */
- if (clen > 0)
- ircomm_control_indication(self, skb, clen);
-
- /* Remove control channel from data channel */
- skb_pull(skb, clen+1);
-
- if (skb->len)
- ircomm_data_indication(self, skb);
- else {
- pr_debug("%s(), data was control info only!\n",
- __func__);
- }
-}
-
-/*
- * Function ircomm_control_request (self, params)
- *
- * Send control data to peer device
- *
- */
-int ircomm_control_request(struct ircomm_cb *self, struct sk_buff *skb)
-{
- int ret;
-
- IRDA_ASSERT(self != NULL, return -EFAULT;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
- IRDA_ASSERT(skb != NULL, return -EFAULT;);
-
- ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL);
-
- return ret;
-}
-
-EXPORT_SYMBOL(ircomm_control_request);
-
-/*
- * Function ircomm_control_indication (self, skb)
- *
- * Data has arrived on the control channel
- *
- */
-static void ircomm_control_indication(struct ircomm_cb *self,
- struct sk_buff *skb, int clen)
-{
- /* Use udata for delivering data on the control channel */
- if (self->notify.udata_indication) {
- struct sk_buff *ctrl_skb;
-
- /* We don't own the skb, so clone it */
- ctrl_skb = skb_clone(skb, GFP_ATOMIC);
- if (!ctrl_skb)
- return;
-
- /* Remove data channel from control channel */
- skb_trim(ctrl_skb, clen+1);
-
- self->notify.udata_indication(self->notify.instance, self,
- ctrl_skb);
-
- /* Drop reference count -
- * see ircomm_tty_control_indication(). */
- dev_kfree_skb(ctrl_skb);
- } else {
- pr_debug("%s(), missing handler\n", __func__);
- }
-}
-
-/*
- * Function ircomm_disconnect_request (self, userdata, priority)
- *
- * User layer wants to disconnect the IrCOMM connection
- *
- */
-int ircomm_disconnect_request(struct ircomm_cb *self, struct sk_buff *userdata)
-{
- struct ircomm_info info;
- int ret;
-
- IRDA_ASSERT(self != NULL, return -1;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
-
- ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata,
- &info);
- return ret;
-}
-
-EXPORT_SYMBOL(ircomm_disconnect_request);
-
-/*
- * Function disconnect_indication (self, skb)
- *
- * Tell user that the link has been disconnected
- *
- */
-void ircomm_disconnect_indication(struct ircomm_cb *self, struct sk_buff *skb,
- struct ircomm_info *info)
-{
- IRDA_ASSERT(info != NULL, return;);
-
- if (self->notify.disconnect_indication) {
- self->notify.disconnect_indication(self->notify.instance, self,
- info->reason, skb);
- } else {
- pr_debug("%s(), missing handler\n", __func__);
- }
-}
-
-/*
- * Function ircomm_flow_request (self, flow)
- *
- *
- *
- */
-void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow)
-{
- IRDA_ASSERT(self != NULL, return;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
-
- if (self->service_type == IRCOMM_3_WIRE_RAW)
- return;
-
- irttp_flow_request(self->tsap, flow);
-}
-
-EXPORT_SYMBOL(ircomm_flow_request);
-
-#ifdef CONFIG_PROC_FS
-static void *ircomm_seq_start(struct seq_file *seq, loff_t *pos)
-{
- struct ircomm_cb *self;
- loff_t off = 0;
-
- spin_lock_irq(&ircomm->hb_spinlock);
-
- for (self = (struct ircomm_cb *) hashbin_get_first(ircomm);
- self != NULL;
- self = (struct ircomm_cb *) hashbin_get_next(ircomm)) {
- if (off++ == *pos)
- break;
-
- }
- return self;
-}
-
-static void *ircomm_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- ++*pos;
-
- return (void *) hashbin_get_next(ircomm);
-}
-
-static void ircomm_seq_stop(struct seq_file *seq, void *v)
-{
- spin_unlock_irq(&ircomm->hb_spinlock);
-}
-
-static int ircomm_seq_show(struct seq_file *seq, void *v)
-{
- const struct ircomm_cb *self = v;
-
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EINVAL; );
-
- if(self->line < 0x10)
- seq_printf(seq, "ircomm%d", self->line);
- else
- seq_printf(seq, "irlpt%d", self->line - 0x10);
-
- seq_printf(seq,
- " state: %s, slsap_sel: %#02x, dlsap_sel: %#02x, mode:",
- ircomm_state[ self->state],
- self->slsap_sel, self->dlsap_sel);
-
- if(self->service_type & IRCOMM_3_WIRE_RAW)
- seq_printf(seq, " 3-wire-raw");
- if(self->service_type & IRCOMM_3_WIRE)
- seq_printf(seq, " 3-wire");
- if(self->service_type & IRCOMM_9_WIRE)
- seq_printf(seq, " 9-wire");
- if(self->service_type & IRCOMM_CENTRONICS)
- seq_printf(seq, " Centronics");
- seq_putc(seq, '\n');
-
- return 0;
-}
-
-static const struct seq_operations ircomm_seq_ops = {
- .start = ircomm_seq_start,
- .next = ircomm_seq_next,
- .stop = ircomm_seq_stop,
- .show = ircomm_seq_show,
-};
-
-static int ircomm_seq_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &ircomm_seq_ops);
-}
-#endif /* CONFIG_PROC_FS */
-
-MODULE_AUTHOR("Dag Brattli <dag@brattli.net>");
-MODULE_DESCRIPTION("IrCOMM protocol");
-MODULE_LICENSE("GPL");
-
-module_init(ircomm_init);
-module_exit(ircomm_cleanup);
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