234 lines
6.1 KiB
C
234 lines
6.1 KiB
C
/*********************************************************************
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*
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* Filename: irlan_provider_event.c
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* Version: 0.9
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* Description: IrLAN provider state machine)
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sun Aug 31 20:14:37 1997
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* Modified at: Sat Oct 30 12:52:41 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* Neither Dag Brattli nor University of Tromsø admit liability nor
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* provide warranty for any of this software. This material is
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* provided "AS-IS" and at no charge.
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*
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********************************************************************/
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#include <net/irda/irda.h>
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#include <net/irda/iriap.h>
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#include <net/irda/irlmp.h>
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#include <net/irda/irttp.h>
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#include <net/irda/irlan_provider.h>
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#include <net/irda/irlan_event.h>
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static int irlan_provider_state_idle(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_provider_state_info(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_provider_state_open(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_provider_state_data(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int (*state[])(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb) =
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{
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irlan_provider_state_idle,
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NULL, /* Query */
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NULL, /* Info */
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irlan_provider_state_info,
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NULL, /* Media */
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irlan_provider_state_open,
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NULL, /* Wait */
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NULL, /* Arb */
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irlan_provider_state_data,
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NULL, /* Close */
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NULL, /* Sync */
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};
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void irlan_do_provider_event(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_ASSERT(*state[ self->provider.state] != NULL, return;);
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(*state[self->provider.state]) (self, event, skb);
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}
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/*
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* Function irlan_provider_state_idle (event, skb, info)
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*
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* IDLE, We are waiting for an indication that there is a provider
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* available.
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*/
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static int irlan_provider_state_idle(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_ASSERT(self != NULL, return -1;);
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switch(event) {
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case IRLAN_CONNECT_INDICATION:
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irlan_provider_connect_response( self, self->provider.tsap_ctrl);
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irlan_next_provider_state( self, IRLAN_INFO);
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break;
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default:
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pr_debug("%s(), Unknown event %d\n", __func__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_provider_state_info (self, event, skb, info)
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*
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* INFO, We have issued a GetInfo command and is awaiting a reply.
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*/
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static int irlan_provider_state_info(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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int ret;
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IRDA_ASSERT(self != NULL, return -1;);
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switch(event) {
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case IRLAN_GET_INFO_CMD:
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/* Be sure to use 802.3 in case of peer mode */
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if (self->provider.access_type == ACCESS_PEER) {
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self->media = MEDIA_802_3;
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/* Check if client has started yet */
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if (self->client.state == IRLAN_IDLE) {
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/* This should get the client going */
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irlmp_discovery_request(8);
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}
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}
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irlan_provider_send_reply(self, CMD_GET_PROVIDER_INFO,
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RSP_SUCCESS);
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/* Keep state */
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break;
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case IRLAN_GET_MEDIA_CMD:
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irlan_provider_send_reply(self, CMD_GET_MEDIA_CHAR,
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RSP_SUCCESS);
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/* Keep state */
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break;
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case IRLAN_OPEN_DATA_CMD:
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ret = irlan_parse_open_data_cmd(self, skb);
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if (self->provider.access_type == ACCESS_PEER) {
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/* FIXME: make use of random functions! */
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self->provider.send_arb_val = (jiffies & 0xffff);
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}
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irlan_provider_send_reply(self, CMD_OPEN_DATA_CHANNEL, ret);
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if (ret == RSP_SUCCESS) {
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irlan_next_provider_state(self, IRLAN_OPEN);
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/* Signal client that we are now open */
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irlan_do_client_event(self, IRLAN_PROVIDER_SIGNAL, NULL);
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}
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break;
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case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
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case IRLAN_LAP_DISCONNECT:
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irlan_next_provider_state(self, IRLAN_IDLE);
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break;
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default:
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pr_debug("%s(), Unknown event %d\n", __func__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_provider_state_open (self, event, skb, info)
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*
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* OPEN, The client has issued a OpenData command and is awaiting a
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* reply
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*
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*/
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static int irlan_provider_state_open(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_ASSERT(self != NULL, return -1;);
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switch(event) {
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case IRLAN_FILTER_CONFIG_CMD:
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irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
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irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
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RSP_SUCCESS);
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/* Keep state */
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break;
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case IRLAN_DATA_CONNECT_INDICATION:
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irlan_next_provider_state(self, IRLAN_DATA);
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irlan_provider_connect_response(self, self->tsap_data);
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break;
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case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
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case IRLAN_LAP_DISCONNECT:
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irlan_next_provider_state(self, IRLAN_IDLE);
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break;
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default:
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pr_debug("%s(), Unknown event %d\n", __func__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_provider_state_data (self, event, skb, info)
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*
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* DATA, The data channel is connected, allowing data transfers between
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* the local and remote machines.
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*
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*/
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static int irlan_provider_state_data(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
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switch(event) {
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case IRLAN_FILTER_CONFIG_CMD:
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irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
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irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
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RSP_SUCCESS);
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break;
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case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
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case IRLAN_LAP_DISCONNECT:
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irlan_next_provider_state(self, IRLAN_IDLE);
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break;
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default:
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pr_debug("%s(), Unknown event %d\n", __func__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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