ircomm_event.rar_event

/********************************************************************* * * 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * ********************************************************************/ #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", }; #ifdef CONFIG_IRDA_DEBUG static const char *const ircomm_event[] = { "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", }; #endif /* CONFIG_IRDA_DEBUG */ 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: IRDA_DEBUG(4, "%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: IRDA_DEBUG(0, "%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: IRDA_DEBUG(0, "%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: IRDA_DEBUG(0, "%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) { IRDA_DEBUG(4, "%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; IRDA_DEBUG(4, "%s: next state=%s, service type=%d\n", __func__ , ircomm_state[self->state], self->service_type); }