patch-2.3.16 linux/net/irda/ircomm/ircomm_core.c
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- Lines: 509
- Date:
Tue Aug 31 11:23:03 1999
- Orig file:
v2.3.15/linux/net/irda/ircomm/ircomm_core.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.15/linux/net/irda/ircomm/ircomm_core.c linux/net/irda/ircomm/ircomm_core.c
@@ -0,0 +1,508 @@
+/*********************************************************************
+ *
+ * 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 Aug 17 11:05:41 1999
+ * Modified by: Dag Brattli <dagb@cs.uit.no>
+ *
+ * Copyright (c) 1999 Dag Brattli, All Rights Reserved.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ ********************************************************************/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <linux/init.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
+static int ircomm_proc_read(char *buf, char **start, off_t offset, int len,
+ int unused);
+
+extern struct proc_dir_entry *proc_irda;
+#endif /* CONFIG_PROC_FS */
+
+hashbin_t *ircomm = NULL;
+
+int __init ircomm_init(void)
+{
+ ircomm = hashbin_new(HB_LOCAL);
+ if (ircomm == NULL) {
+ ERROR(__FUNCTION__ "(), can't allocate hashbin!\n");
+ return -ENOMEM;
+ }
+
+#ifdef CONFIG_PROC_FS
+ create_proc_entry("ircomm", 0, proc_irda)->get_info = ircomm_proc_read;
+#endif /* CONFIG_PROC_FS */
+
+ MESSAGE("IrCOMM protocol (Dag Brattli)\n");
+
+ return 0;
+}
+
+#ifdef MODULE
+void ircomm_cleanup(void)
+{
+ DEBUG(2, __FUNCTION__ "()\n");
+
+ hashbin_delete(ircomm, (FREE_FUNC) __ircomm_close);
+
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("ircomm", proc_irda);
+#endif /* CONFIG_PROC_FS */
+}
+#endif /* MODULE */
+
+/*
+ * 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;
+
+ DEBUG(2, __FUNCTION__ "(), service_type=0x%02x\n",
+ service_type);
+
+ ASSERT(ircomm != NULL, return NULL;);
+
+ self = kmalloc(sizeof(struct ircomm_cb), GFP_ATOMIC);
+ if (self == NULL)
+ return NULL;
+
+ memset(self, 0, sizeof(struct ircomm_cb));
+
+ 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)
+ return NULL;
+
+ self->service_type = service_type;
+ self->line = line;
+
+ hashbin_insert(ircomm, (QUEUE *) self, line, NULL);
+
+ ircomm_next_state(self, IRCOMM_IDLE);
+
+ return self;
+}
+
+/*
+ * Function ircomm_close_instance (self)
+ *
+ * Remove IrCOMM instance
+ *
+ */
+static int __ircomm_close(struct ircomm_cb *self)
+{
+ DEBUG(2, __FUNCTION__"()\n");
+
+ ASSERT(self != NULL, return -EIO;);
+ ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;);
+
+ /* 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;
+
+ entry = hashbin_remove(ircomm, self->line, NULL);
+
+ ASSERT(entry == self, return -1;);
+
+ return __ircomm_close(self);
+}
+
+/*
+ * 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;
+
+ DEBUG(2 , __FUNCTION__"()\n");
+
+ ASSERT(self != NULL, return -1;);
+ 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;
+}
+
+/*
+ * Function ircomm_connect_indication (self, qos, skb)
+ *
+ * Notify user layer about the incomming connection
+ *
+ */
+void ircomm_connect_indication(struct ircomm_cb *self, struct sk_buff *skb,
+ struct ircomm_info *info)
+{
+ int clen = 0;
+
+ DEBUG(2, __FUNCTION__ "()\n");
+
+ /* Check if the packet contains data on the control channel */
+ if (skb->len > 0)
+ clen = skb->data[0];
+
+ /*
+ * 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 0
+ if (clen > 0)
+ ircomm_control_indication(self, skb, clen);
+#endif
+ if (self->notify.connect_indication)
+ self->notify.connect_indication(self->notify.instance, self,
+ info->qos, info->max_data_size,
+ info->max_header_size, skb);
+}
+
+/*
+ * 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;
+
+ ASSERT(self != NULL, return -1;);
+ ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
+
+ DEBUG(4, __FUNCTION__ "()\n");
+
+ ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL);
+
+ return ret;
+}
+
+/*
+ * 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)
+{
+ DEBUG(4, __FUNCTION__"()\n");
+
+ if (self->notify.connect_confirm )
+ self->notify.connect_confirm(self->notify.instance,
+ self, info->qos,
+ info->max_data_size,
+ info->max_header_size, skb);
+}
+
+/*
+ * 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;
+
+ DEBUG(4, __FUNCTION__"()\n");
+
+ ASSERT(self != NULL, return -EFAULT;);
+ ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
+ ASSERT(skb != NULL, return -EFAULT;);
+
+ ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL);
+
+ return ret;
+}
+
+/*
+ * 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)
+{
+ DEBUG(4, __FUNCTION__"()\n");
+
+ ASSERT(skb->len > 0, return;);
+
+ if (self->notify.data_indication)
+ self->notify.data_indication(self->notify.instance, self, skb);
+}
+
+/*
+ * 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;
+
+ ASSERT(skb->len > 0, return;);
+
+ clen = skb->data[0];
+
+ /*
+ * 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 {
+ DEBUG(4, __FUNCTION__ "(), data was control info only!\n");
+ dev_kfree_skb(skb);
+ }
+}
+
+/*
+ * 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;
+
+ DEBUG(2, __FUNCTION__"()\n");
+
+ ASSERT(self != NULL, return -EFAULT;);
+ ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
+ ASSERT(skb != NULL, return -EFAULT;);
+
+ ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL);
+
+ return ret;
+}
+
+/*
+ * 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)
+{
+ struct sk_buff *ctrl_skb;
+
+ DEBUG(2, __FUNCTION__"()\n");
+
+ ctrl_skb = skb_clone(skb, GFP_ATOMIC);
+ if (!ctrl_skb)
+ return;
+
+ /* Remove data channel from control channel */
+ skb_trim(ctrl_skb, clen+1);
+
+ /* Use udata for delivering data on the control channel */
+ if (self->notify.udata_indication)
+ self->notify.udata_indication(self->notify.instance, self,
+ ctrl_skb);
+}
+
+/*
+ * 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;
+
+ DEBUG(2, __FUNCTION__"()\n");
+
+ ASSERT(self != NULL, return -1;);
+ ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
+
+ ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata,
+ &info);
+ return ret;
+}
+
+/*
+ * 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)
+{
+ DEBUG(2, __FUNCTION__ "()\n");
+
+ ASSERT(info != NULL, return;);
+
+ if (self->notify.disconnect_indication) {
+ self->notify.disconnect_indication(self->notify.instance, self,
+ info->reason, skb);
+ }
+}
+
+/*
+ * Function ircomm_flow_request (self, flow)
+ *
+ *
+ *
+ */
+void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow)
+{
+ DEBUG(2, __FUNCTION__ "()\n");
+
+ ASSERT(self != NULL, return;);
+ ASSERT(self->magic == IRCOMM_MAGIC, return;);
+
+ if (self->service_type == IRCOMM_3_WIRE_RAW)
+ return;
+
+ irttp_flow_request(self->tsap, flow);
+}
+
+#ifdef CONFIG_PROC_FS
+/*
+ * Function ircomm_proc_read (buf, start, offset, len, unused)
+ *
+ *
+ *
+ */
+int ircomm_proc_read(char *buf, char **start, off_t offset, int len,
+ int unused)
+{
+ struct ircomm_cb *self;
+ unsigned long flags;
+ int i=0;
+
+ save_flags(flags);
+ cli();
+
+ len = 0;
+
+ len += sprintf(buf+len, "Instance %d:\n", i++);
+
+ self = (struct ircomm_cb *) hashbin_get_first(ircomm);
+ while (self != NULL) {
+ ASSERT(self->magic == IRCOMM_MAGIC, return len;);
+
+ self = (struct ircomm_cb *) hashbin_get_next(ircomm);
+ }
+ restore_flags(flags);
+
+ return len;
+}
+#endif /* CONFIG_PROC_FS */
+
+#ifdef MODULE
+int init_module(void)
+{
+ return ircomm_init();
+}
+
+void cleanup_module(void)
+{
+ ircomm_cleanup();
+}
+#endif /* MODULE */
+
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