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Diffstat (limited to 'net/irda/ircomm/ircomm_event.c')
-rw-r--r--net/irda/ircomm/ircomm_event.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/net/irda/ircomm/ircomm_event.c b/net/irda/ircomm/ircomm_event.c
new file mode 100644
index 000000000..b0730ac9f
--- /dev/null
+++ b/net/irda/ircomm/ircomm_event.c
@@ -0,0 +1,246 @@
+/*********************************************************************
+ *
+ * Filename: ircomm_event.c
+ * Version: 1.0
+ * Description: IrCOMM layer state machine
+ * Status: Stable
+ * Author: Dag Brattli <dagb@cs.uit.no>
+ * Created at: Sun Jun 6 20:33:11 1999
+ * Modified at: Sun Dec 12 13:44:32 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, see <http://www.gnu.org/licenses/>.
+ *
+ ********************************************************************/
+
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+
+#include <net/irda/irda.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_core.h>
+#include <net/irda/ircomm_event.h>
+
+static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info);
+static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info);
+static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info);
+static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info);
+
+const char *const ircomm_state[] = {
+ "IRCOMM_IDLE",
+ "IRCOMM_WAITI",
+ "IRCOMM_WAITR",
+ "IRCOMM_CONN",
+};
+
+static const char *const ircomm_event[] __maybe_unused = {
+ "IRCOMM_CONNECT_REQUEST",
+ "IRCOMM_CONNECT_RESPONSE",
+ "IRCOMM_TTP_CONNECT_INDICATION",
+ "IRCOMM_LMP_CONNECT_INDICATION",
+ "IRCOMM_TTP_CONNECT_CONFIRM",
+ "IRCOMM_LMP_CONNECT_CONFIRM",
+
+ "IRCOMM_LMP_DISCONNECT_INDICATION",
+ "IRCOMM_TTP_DISCONNECT_INDICATION",
+ "IRCOMM_DISCONNECT_REQUEST",
+
+ "IRCOMM_TTP_DATA_INDICATION",
+ "IRCOMM_LMP_DATA_INDICATION",
+ "IRCOMM_DATA_REQUEST",
+ "IRCOMM_CONTROL_REQUEST",
+ "IRCOMM_CONTROL_INDICATION",
+};
+
+static int (*state[])(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info) =
+{
+ ircomm_state_idle,
+ ircomm_state_waiti,
+ ircomm_state_waitr,
+ ircomm_state_conn,
+};
+
+/*
+ * Function ircomm_state_idle (self, event, skb)
+ *
+ * IrCOMM is currently idle
+ *
+ */
+static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info)
+{
+ int ret = 0;
+
+ switch (event) {
+ case IRCOMM_CONNECT_REQUEST:
+ ircomm_next_state(self, IRCOMM_WAITI);
+ ret = self->issue.connect_request(self, skb, info);
+ break;
+ case IRCOMM_TTP_CONNECT_INDICATION:
+ case IRCOMM_LMP_CONNECT_INDICATION:
+ ircomm_next_state(self, IRCOMM_WAITR);
+ ircomm_connect_indication(self, skb, info);
+ break;
+ default:
+ pr_debug("%s(), unknown event: %s\n", __func__ ,
+ ircomm_event[event]);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+/*
+ * Function ircomm_state_waiti (self, event, skb)
+ *
+ * The IrCOMM user has requested an IrCOMM connection to the remote
+ * device and is awaiting confirmation
+ */
+static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info)
+{
+ int ret = 0;
+
+ switch (event) {
+ case IRCOMM_TTP_CONNECT_CONFIRM:
+ case IRCOMM_LMP_CONNECT_CONFIRM:
+ ircomm_next_state(self, IRCOMM_CONN);
+ ircomm_connect_confirm(self, skb, info);
+ break;
+ case IRCOMM_TTP_DISCONNECT_INDICATION:
+ case IRCOMM_LMP_DISCONNECT_INDICATION:
+ ircomm_next_state(self, IRCOMM_IDLE);
+ ircomm_disconnect_indication(self, skb, info);
+ break;
+ default:
+ pr_debug("%s(), unknown event: %s\n", __func__ ,
+ ircomm_event[event]);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+/*
+ * Function ircomm_state_waitr (self, event, skb)
+ *
+ * IrCOMM has received an incoming connection request and is awaiting
+ * response from the user
+ */
+static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info)
+{
+ int ret = 0;
+
+ switch (event) {
+ case IRCOMM_CONNECT_RESPONSE:
+ ircomm_next_state(self, IRCOMM_CONN);
+ ret = self->issue.connect_response(self, skb);
+ break;
+ case IRCOMM_DISCONNECT_REQUEST:
+ ircomm_next_state(self, IRCOMM_IDLE);
+ ret = self->issue.disconnect_request(self, skb, info);
+ break;
+ case IRCOMM_TTP_DISCONNECT_INDICATION:
+ case IRCOMM_LMP_DISCONNECT_INDICATION:
+ ircomm_next_state(self, IRCOMM_IDLE);
+ ircomm_disconnect_indication(self, skb, info);
+ break;
+ default:
+ pr_debug("%s(), unknown event = %s\n", __func__ ,
+ ircomm_event[event]);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+/*
+ * Function ircomm_state_conn (self, event, skb)
+ *
+ * IrCOMM is connected to the peer IrCOMM device
+ *
+ */
+static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info)
+{
+ int ret = 0;
+
+ switch (event) {
+ case IRCOMM_DATA_REQUEST:
+ ret = self->issue.data_request(self, skb, 0);
+ break;
+ case IRCOMM_TTP_DATA_INDICATION:
+ ircomm_process_data(self, skb);
+ break;
+ case IRCOMM_LMP_DATA_INDICATION:
+ ircomm_data_indication(self, skb);
+ break;
+ case IRCOMM_CONTROL_REQUEST:
+ /* Just send a separate frame for now */
+ ret = self->issue.data_request(self, skb, skb->len);
+ break;
+ case IRCOMM_TTP_DISCONNECT_INDICATION:
+ case IRCOMM_LMP_DISCONNECT_INDICATION:
+ ircomm_next_state(self, IRCOMM_IDLE);
+ ircomm_disconnect_indication(self, skb, info);
+ break;
+ case IRCOMM_DISCONNECT_REQUEST:
+ ircomm_next_state(self, IRCOMM_IDLE);
+ ret = self->issue.disconnect_request(self, skb, info);
+ break;
+ default:
+ pr_debug("%s(), unknown event = %s\n", __func__ ,
+ ircomm_event[event]);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+/*
+ * Function ircomm_do_event (self, event, skb)
+ *
+ * Process event
+ *
+ */
+int ircomm_do_event(struct ircomm_cb *self, IRCOMM_EVENT event,
+ struct sk_buff *skb, struct ircomm_info *info)
+{
+ pr_debug("%s: state=%s, event=%s\n", __func__ ,
+ ircomm_state[self->state], ircomm_event[event]);
+
+ return (*state[self->state])(self, event, skb, info);
+}
+
+/*
+ * Function ircomm_next_state (self, state)
+ *
+ * Switch state
+ *
+ */
+void ircomm_next_state(struct ircomm_cb *self, IRCOMM_STATE state)
+{
+ self->state = state;
+
+ pr_debug("%s: next state=%s, service type=%d\n", __func__ ,
+ ircomm_state[self->state], self->service_type);
+}
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