/*********************************************************************
*
* Filename: irlan_filter.c
* Version:
* Description:
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Fri Jan 29 11:16:38 1999
* Modified at: Sat Oct 30 12:58:45 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 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.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/skbuff.h>
#include <linux/random.h>
#include <linux/seq_file.h>
#include <net/irda/irlan_common.h>
#include <net/irda/irlan_filter.h>
/*
* Function irlan_filter_request (self, skb)
*
* Handle filter request from client peer device
*
*/
void irlan_filter_request(struct irlan_cb *self, struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
if ((self->provider.filter_type == IRLAN_DIRECTED) &&
(self->provider.filter_operation == DYNAMIC))
{
pr_debug("Giving peer a dynamic Ethernet address\n");
self->provider.mac_address[0] = 0x40;
self->provider.mac_address[1] = 0x00;
self->provider.mac_address[2] = 0x00;
self->provider.mac_address[3] = 0x00;
/* Use arbitration value to generate MAC address */
if (self->provider.access_type == ACCESS_PEER) {
self->provider.mac_address[4] =
self->provider.send_arb_val & 0xff;
self->provider.mac_address[5] =
(self->provider.send_arb_val >> 8) & 0xff;
} else {
/* Just generate something for now */
get_random_bytes(self->provider.mac_address+4, 1);
get_random_bytes(self->provider.mac_address+5, 1);
}
skb->data[0] = 0x00; /* Success */
skb->data[1] = 0x03;
irlan_insert_string_param(skb, "FILTER_MODE", "NONE");
irlan_insert_short_param(skb, "MAX_ENTRY", 0x0001);
irlan_insert_array_param(skb, "FILTER_ENTRY",
self->provider.mac_address, 6);
return;
}
if ((self->provider.filter_type == IRLAN_DIRECTED) &&
(self->provider.filter_mode == FILTER))
{
pr_debug("Directed filter on\n");
skb->data[0] = 0x00; /* Success */
skb->data[1] = 0x00;
return;
}
if ((self->provider.filter_type == IRLAN_DIRECTED) &&
(self->provider.filter_mode == NONE))
{
pr_debug("Directed filter off\n");
skb->data[0] = 0x00; /* Success */
skb->data[1] = 0x00;
return;
}
if ((self->provider.filter_type == IRLAN_BROADCAST) &&
(self->provider.filter_mode == FILTER))
{
pr_debug("Broadcast filter on\n");
skb->data[0] = 0x00; /* Success */
skb->data[1] = 0x00;
return;
}
if ((self->provider.filter_type == IRLAN_BROADCAST) &&
(self->provider.filter_mode == NONE))
{
pr_debug("Broadcast filter off\n");
skb->data[0] = 0x00; /* Success */
skb->data[1] = 0x00;
return;
}
if ((self->provider.filter_type == IRLAN_MULTICAST) &&
(self->provider.filter_mode == FILTER))
{
pr_debug("Multicast filter on\n");
skb->data[0] = 0x00; /* Success */
skb->data[1] = 0x00;
return;
}
if ((self->provider.filter_type == IRLAN_MULTICAST) &&
(self->provider.filter_mode == NONE))
{
pr_debug("Multicast filter off\n");
skb->data[0] = 0x00; /* Success */
skb->data[1] = 0x00;
return;
}
if ((self->provider.filter_type == IRLAN_MULTICAST) &&
(self->provider.filter_operation == GET))
{
pr_debug("Multicast filter get\n");
skb->data[0] = 0x00; /* Success? */
skb->data[1] = 0x02;
irlan_insert_string_param(skb, "FILTER_MODE", "NONE");
irlan_insert_short_param(skb, "MAX_ENTRY", 16);
return;
}
skb->data[0] = 0x00; /* Command not supported */
skb->data[1] = 0x00;
pr_debug("Not implemented!\n");
}
/*
* Function check_request_param (self, param, value)
*
* Check parameters in request from peer device
*
*/
void irlan_check_command_param(struct irlan_cb *self, char *param, char *value)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
pr_debug("%s, %s\n", param, value);
/*
* This is experimental!! DB.
*/
if (strcmp(param, "MODE") == 0) {
self->use_udata = TRUE;
return;
}
/*
* FILTER_TYPE
*/
if (strcmp(param, "FILTER_TYPE") == 0) {
if (strcmp(value, "DIRECTED") == 0) {
self->provider.filter_type = IRLAN_DIRECTED;
return;
}
if (strcmp(value, "MULTICAST") == 0) {
self->provider.filter_type = IRLAN_MULTICAST;
return;
}
if (strcmp(value, "BROADCAST") == 0) {
self->provider.filter_type = IRLAN_BROADCAST;
return;
}
}
/*
* FILTER_MODE
*/
if (strcmp(param, "FILTER_MODE") == 0) {
if (strcmp(value, "ALL") == 0) {
self->provider.filter_mode = ALL;
return;
}
if (strcmp(value, "FILTER") == 0) {
self->provider.filter_mode = FILTER;
return;
}
if (strcmp(value, "NONE") == 0) {
self->provider.filter_mode = FILTER;
return;
}
}
/*
* FILTER_OPERATION
*/
if (strcmp(param, "FILTER_OPERATION") == 0) {
if (strcmp(value, "DYNAMIC") == 0) {
self->provider.filter_operation = DYNAMIC;
return;
}
if (strcmp(value, "GET") == 0) {
self->provider.filter_operation = GET;
return;
}
}
}
/*
* Function irlan_print_filter (filter_type, buf)
*
* Print status of filter. Used by /proc file system
*
*/
#ifdef CONFIG_PROC_FS
#define MASK2STR(m,s) { .mask = m, .str = s }
void irlan_print_filter(struct seq_file *seq, int filter_type)
{
static struct {
int mask;
const char *str;
} filter_mask2str[] = {
MASK2STR(IRLAN_DIRECTED, "DIRECTED"),
MASK2STR(IRLAN_FUNCTIONAL, "FUNCTIONAL"),
MASK2STR(IRLAN_GROUP, "GROUP"),
MASK2STR(IRLAN_MAC_FRAME, "MAC_FRAME"),
MASK2STR(IRLAN_MULTICAST, "MULTICAST"),
MASK2STR(IRLAN_BROADCAST, "BROADCAST"),
MASK2STR(IRLAN_IPX_SOCKET, "IPX_SOCKET"),
MASK2STR(0, NULL)
}, *p;
for (p = filter_mask2str; p->str; p++) {
if (filter_type & p->mask)
seq_printf(seq, "%s ", p->str);
}
seq_putc(seq, '\n');
}
#undef MASK2STR
#endif