| /********************************************************************* |
| * |
| * 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)) |
| { |
| IRDA_DEBUG(0, "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)) |
| { |
| IRDA_DEBUG(0, "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)) |
| { |
| IRDA_DEBUG(0, "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)) |
| { |
| IRDA_DEBUG(0, "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)) |
| { |
| IRDA_DEBUG(0, "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)) |
| { |
| IRDA_DEBUG(0, "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)) |
| { |
| IRDA_DEBUG(0, "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)) |
| { |
| IRDA_DEBUG(0, "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; |
| |
| IRDA_DEBUG(0, "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_DEBUG(4, "%s()\n", __func__ ); |
| |
| IRDA_ASSERT(self != NULL, return;); |
| IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;); |
| |
| IRDA_DEBUG(4, "%s, %s\n", param, value); |
| |
| /* |
| * This is experimental!! DB. |
| */ |
| if (strcmp(param, "MODE") == 0) { |
| IRDA_DEBUG(0, "%s()\n", __func__ ); |
| 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 |