mirror of https://gitee.com/openkylin/linux.git
414 lines
11 KiB
C
414 lines
11 KiB
C
/*********************************************************************
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*
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* Filename: irlan_provider.c
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* Version: 0.9
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* Description: IrDA LAN Access Protocol Implementation
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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 12:52:10 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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* Sources: skeleton.c by Donald Becker <becker@CESDIS.gsfc.nasa.gov>
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* slip.c by Laurence Culhane, <loz@holmes.demon.co.uk>
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* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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*
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* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
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* 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 <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/init.h>
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#include <linux/random.h>
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#include <linux/bitops.h>
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#include <asm/system.h>
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#include <asm/byteorder.h>
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#include <net/irda/irda.h>
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#include <net/irda/irttp.h>
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#include <net/irda/irlmp.h>
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#include <net/irda/irias_object.h>
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#include <net/irda/iriap.h>
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#include <net/irda/timer.h>
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#include <net/irda/irlan_common.h>
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#include <net/irda/irlan_eth.h>
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#include <net/irda/irlan_event.h>
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#include <net/irda/irlan_provider.h>
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#include <net/irda/irlan_filter.h>
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#include <net/irda/irlan_client.h>
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static void irlan_provider_connect_indication(void *instance, void *sap,
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struct qos_info *qos,
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__u32 max_sdu_size,
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__u8 max_header_size,
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struct sk_buff *skb);
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/*
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* Function irlan_provider_control_data_indication (handle, skb)
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*
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* This function gets the data that is received on the control channel
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*
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*/
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static int irlan_provider_data_indication(void *instance, void *sap,
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struct sk_buff *skb)
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{
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struct irlan_cb *self;
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__u8 code;
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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self = (struct irlan_cb *) instance;
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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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IRDA_ASSERT(skb != NULL, return -1;);
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code = skb->data[0];
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switch(code) {
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case CMD_GET_PROVIDER_INFO:
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IRDA_DEBUG(4, "Got GET_PROVIDER_INFO command!\n");
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irlan_do_provider_event(self, IRLAN_GET_INFO_CMD, skb);
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break;
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case CMD_GET_MEDIA_CHAR:
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IRDA_DEBUG(4, "Got GET_MEDIA_CHAR command!\n");
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irlan_do_provider_event(self, IRLAN_GET_MEDIA_CMD, skb);
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break;
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case CMD_OPEN_DATA_CHANNEL:
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IRDA_DEBUG(4, "Got OPEN_DATA_CHANNEL command!\n");
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irlan_do_provider_event(self, IRLAN_OPEN_DATA_CMD, skb);
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break;
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case CMD_FILTER_OPERATION:
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IRDA_DEBUG(4, "Got FILTER_OPERATION command!\n");
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irlan_do_provider_event(self, IRLAN_FILTER_CONFIG_CMD, skb);
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break;
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case CMD_RECONNECT_DATA_CHAN:
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IRDA_DEBUG(2, "%s(), Got RECONNECT_DATA_CHAN command\n", __FUNCTION__ );
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IRDA_DEBUG(2, "%s(), NOT IMPLEMENTED\n", __FUNCTION__ );
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break;
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case CMD_CLOSE_DATA_CHAN:
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IRDA_DEBUG(2, "Got CLOSE_DATA_CHAN command!\n");
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IRDA_DEBUG(2, "%s(), NOT IMPLEMENTED\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown command!\n", __FUNCTION__ );
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break;
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}
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return 0;
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}
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/*
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* Function irlan_provider_connect_indication (handle, skb, priv)
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*
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* Got connection from peer IrLAN client
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*
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*/
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static void irlan_provider_connect_indication(void *instance, void *sap,
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struct qos_info *qos,
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__u32 max_sdu_size,
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__u8 max_header_size,
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struct sk_buff *skb)
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{
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struct irlan_cb *self;
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struct tsap_cb *tsap;
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__u32 saddr, daddr;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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self = (struct irlan_cb *) instance;
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tsap = (struct tsap_cb *) sap;
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
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IRDA_ASSERT(tsap == self->provider.tsap_ctrl,return;);
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IRDA_ASSERT(self->provider.state == IRLAN_IDLE, return;);
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daddr = irttp_get_daddr(tsap);
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saddr = irttp_get_saddr(tsap);
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self->provider.max_sdu_size = max_sdu_size;
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self->provider.max_header_size = max_header_size;
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irlan_do_provider_event(self, IRLAN_CONNECT_INDICATION, NULL);
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/*
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* If we are in peer mode, the client may not have got the discovery
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* indication it needs to make progress. If the client is still in
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* IDLE state, we must kick it.
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*/
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if ((self->provider.access_type == ACCESS_PEER) &&
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(self->client.state == IRLAN_IDLE))
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{
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irlan_client_wakeup(self, self->saddr, self->daddr);
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}
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}
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/*
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* Function irlan_provider_connect_response (handle)
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*
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* Accept incoming connection
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*
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*/
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void irlan_provider_connect_response(struct irlan_cb *self,
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struct tsap_cb *tsap)
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{
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
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/* Just accept */
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irttp_connect_response(tsap, IRLAN_MTU, NULL);
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}
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static void irlan_provider_disconnect_indication(void *instance, void *sap,
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LM_REASON reason,
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struct sk_buff *userdata)
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{
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struct irlan_cb *self;
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struct tsap_cb *tsap;
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IRDA_DEBUG(4, "%s(), reason=%d\n", __FUNCTION__ , reason);
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self = (struct irlan_cb *) instance;
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tsap = (struct tsap_cb *) sap;
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
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IRDA_ASSERT(tsap != NULL, return;);
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IRDA_ASSERT(tsap->magic == TTP_TSAP_MAGIC, return;);
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IRDA_ASSERT(tsap == self->provider.tsap_ctrl, return;);
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irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);
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}
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/*
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* Function irlan_parse_open_data_cmd (self, skb)
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*
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*
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*
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*/
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int irlan_parse_open_data_cmd(struct irlan_cb *self, struct sk_buff *skb)
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{
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int ret;
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ret = irlan_provider_parse_command(self, CMD_OPEN_DATA_CHANNEL, skb);
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/* Open data channel */
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irlan_open_data_tsap(self);
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return ret;
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}
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/*
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* Function parse_command (skb)
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*
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* Extract all parameters from received buffer, then feed them to
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* check_params for parsing
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*
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*/
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int irlan_provider_parse_command(struct irlan_cb *self, int cmd,
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struct sk_buff *skb)
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{
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__u8 *frame;
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__u8 *ptr;
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int count;
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__u16 val_len;
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int i;
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char *name;
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char *value;
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int ret = RSP_SUCCESS;
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IRDA_ASSERT(skb != NULL, return -RSP_PROTOCOL_ERROR;);
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IRDA_DEBUG(4, "%s(), skb->len=%d\n", __FUNCTION__ , (int)skb->len);
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IRDA_ASSERT(self != NULL, return -RSP_PROTOCOL_ERROR;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -RSP_PROTOCOL_ERROR;);
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if (!skb)
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return -RSP_PROTOCOL_ERROR;
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frame = skb->data;
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name = kmalloc(255, GFP_ATOMIC);
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if (!name)
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return -RSP_INSUFFICIENT_RESOURCES;
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value = kmalloc(1016, GFP_ATOMIC);
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if (!value) {
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kfree(name);
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return -RSP_INSUFFICIENT_RESOURCES;
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}
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/* How many parameters? */
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count = frame[1];
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IRDA_DEBUG(4, "Got %d parameters\n", count);
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ptr = frame+2;
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/* For all parameters */
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for (i=0; i<count;i++) {
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ret = irlan_extract_param(ptr, name, value, &val_len);
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if (ret < 0) {
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IRDA_DEBUG(2, "%s(), IrLAN, Error!\n", __FUNCTION__ );
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break;
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}
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ptr+=ret;
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ret = RSP_SUCCESS;
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irlan_check_command_param(self, name, value);
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}
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/* Cleanup */
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kfree(name);
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kfree(value);
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return ret;
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}
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/*
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* Function irlan_provider_send_reply (self, info)
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*
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* Send reply to query to peer IrLAN layer
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*
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*/
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void irlan_provider_send_reply(struct irlan_cb *self, int command,
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int ret_code)
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{
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struct sk_buff *skb;
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
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skb = dev_alloc_skb(128);
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if (!skb)
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return;
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/* Reserve space for TTP, LMP, and LAP header */
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skb_reserve(skb, self->provider.max_header_size);
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skb_put(skb, 2);
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switch (command) {
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case CMD_GET_PROVIDER_INFO:
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skb->data[0] = 0x00; /* Success */
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skb->data[1] = 0x02; /* 2 parameters */
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switch (self->media) {
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case MEDIA_802_3:
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irlan_insert_string_param(skb, "MEDIA", "802.3");
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break;
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case MEDIA_802_5:
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irlan_insert_string_param(skb, "MEDIA", "802.5");
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break;
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default:
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IRDA_DEBUG(2, "%s(), unknown media type!\n", __FUNCTION__ );
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break;
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}
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irlan_insert_short_param(skb, "IRLAN_VER", 0x0101);
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break;
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case CMD_GET_MEDIA_CHAR:
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skb->data[0] = 0x00; /* Success */
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skb->data[1] = 0x05; /* 5 parameters */
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irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
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irlan_insert_string_param(skb, "FILTER_TYPE", "BROADCAST");
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irlan_insert_string_param(skb, "FILTER_TYPE", "MULTICAST");
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switch (self->provider.access_type) {
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case ACCESS_DIRECT:
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irlan_insert_string_param(skb, "ACCESS_TYPE", "DIRECT");
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break;
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case ACCESS_PEER:
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irlan_insert_string_param(skb, "ACCESS_TYPE", "PEER");
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break;
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case ACCESS_HOSTED:
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irlan_insert_string_param(skb, "ACCESS_TYPE", "HOSTED");
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown access type\n", __FUNCTION__ );
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break;
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}
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irlan_insert_short_param(skb, "MAX_FRAME", 0x05ee);
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break;
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case CMD_OPEN_DATA_CHANNEL:
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skb->data[0] = 0x00; /* Success */
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if (self->provider.send_arb_val) {
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skb->data[1] = 0x03; /* 3 parameters */
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irlan_insert_short_param(skb, "CON_ARB",
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self->provider.send_arb_val);
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} else
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skb->data[1] = 0x02; /* 2 parameters */
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irlan_insert_byte_param(skb, "DATA_CHAN", self->stsap_sel_data);
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irlan_insert_array_param(skb, "RECONNECT_KEY", "LINUX RULES!",
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12);
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break;
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case CMD_FILTER_OPERATION:
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irlan_filter_request(self, skb);
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown command!\n", __FUNCTION__ );
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break;
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}
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irttp_data_request(self->provider.tsap_ctrl, skb);
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}
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/*
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* Function irlan_provider_register(void)
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*
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* Register provider support so we can accept incoming connections.
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*
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*/
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int irlan_provider_open_ctrl_tsap(struct irlan_cb *self)
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{
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struct tsap_cb *tsap;
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notify_t notify;
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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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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/* Check if already open */
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if (self->provider.tsap_ctrl)
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return -1;
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/*
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* First register well known control TSAP
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*/
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irda_notify_init(¬ify);
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notify.data_indication = irlan_provider_data_indication;
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notify.connect_indication = irlan_provider_connect_indication;
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notify.disconnect_indication = irlan_provider_disconnect_indication;
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notify.instance = self;
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strlcpy(notify.name, "IrLAN ctrl (p)", sizeof(notify.name));
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tsap = irttp_open_tsap(LSAP_ANY, 1, ¬ify);
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if (!tsap) {
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IRDA_DEBUG(2, "%s(), Got no tsap!\n", __FUNCTION__ );
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return -1;
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}
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self->provider.tsap_ctrl = tsap;
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/* Register with LM-IAS */
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irlan_ias_register(self, tsap->stsap_sel);
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return 0;
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}
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