1/********************************************************************* 2 * 3 * Filename: irlan_filter.c 4 * Version: 5 * Description: 6 * Status: Experimental. 7 * Author: Dag Brattli <dagb@cs.uit.no> 8 * Created at: Fri Jan 29 11:16:38 1999 9 * Modified at: Sat Oct 30 12:58:45 1999 10 * Modified by: Dag Brattli <dagb@cs.uit.no> 11 * 12 * Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved. 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License as 16 * published by the Free Software Foundation; either version 2 of 17 * the License, or (at your option) any later version. 18 * 19 * Neither Dag Brattli nor University of Tromsø admit liability nor 20 * provide warranty for any of this software. This material is 21 * provided "AS-IS" and at no charge. 22 * 23 ********************************************************************/ 24 25#include <linux/skbuff.h> 26#include <linux/random.h> 27#include <linux/seq_file.h> 28 29#include <net/irda/irlan_common.h> 30#include <net/irda/irlan_filter.h> 31 32/* 33 * Function irlan_filter_request (self, skb) 34 * 35 * Handle filter request from client peer device 36 * 37 */ 38void irlan_filter_request(struct irlan_cb *self, struct sk_buff *skb) 39{ 40 IRDA_ASSERT(self != NULL, return;); 41 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;); 42 43 if ((self->provider.filter_type == IRLAN_DIRECTED) && 44 (self->provider.filter_operation == DYNAMIC)) 45 { 46 pr_debug("Giving peer a dynamic Ethernet address\n"); 47 self->provider.mac_address[0] = 0x40; 48 self->provider.mac_address[1] = 0x00; 49 self->provider.mac_address[2] = 0x00; 50 self->provider.mac_address[3] = 0x00; 51 52 /* Use arbitration value to generate MAC address */ 53 if (self->provider.access_type == ACCESS_PEER) { 54 self->provider.mac_address[4] = 55 self->provider.send_arb_val & 0xff; 56 self->provider.mac_address[5] = 57 (self->provider.send_arb_val >> 8) & 0xff; 58 } else { 59 /* Just generate something for now */ 60 get_random_bytes(self->provider.mac_address+4, 1); 61 get_random_bytes(self->provider.mac_address+5, 1); 62 } 63 64 skb->data[0] = 0x00; /* Success */ 65 skb->data[1] = 0x03; 66 irlan_insert_string_param(skb, "FILTER_MODE", "NONE"); 67 irlan_insert_short_param(skb, "MAX_ENTRY", 0x0001); 68 irlan_insert_array_param(skb, "FILTER_ENTRY", 69 self->provider.mac_address, 6); 70 return; 71 } 72 73 if ((self->provider.filter_type == IRLAN_DIRECTED) && 74 (self->provider.filter_mode == FILTER)) 75 { 76 pr_debug("Directed filter on\n"); 77 skb->data[0] = 0x00; /* Success */ 78 skb->data[1] = 0x00; 79 return; 80 } 81 if ((self->provider.filter_type == IRLAN_DIRECTED) && 82 (self->provider.filter_mode == NONE)) 83 { 84 pr_debug("Directed filter off\n"); 85 skb->data[0] = 0x00; /* Success */ 86 skb->data[1] = 0x00; 87 return; 88 } 89 90 if ((self->provider.filter_type == IRLAN_BROADCAST) && 91 (self->provider.filter_mode == FILTER)) 92 { 93 pr_debug("Broadcast filter on\n"); 94 skb->data[0] = 0x00; /* Success */ 95 skb->data[1] = 0x00; 96 return; 97 } 98 if ((self->provider.filter_type == IRLAN_BROADCAST) && 99 (self->provider.filter_mode == NONE)) 100 { 101 pr_debug("Broadcast filter off\n"); 102 skb->data[0] = 0x00; /* Success */ 103 skb->data[1] = 0x00; 104 return; 105 } 106 if ((self->provider.filter_type == IRLAN_MULTICAST) && 107 (self->provider.filter_mode == FILTER)) 108 { 109 pr_debug("Multicast filter on\n"); 110 skb->data[0] = 0x00; /* Success */ 111 skb->data[1] = 0x00; 112 return; 113 } 114 if ((self->provider.filter_type == IRLAN_MULTICAST) && 115 (self->provider.filter_mode == NONE)) 116 { 117 pr_debug("Multicast filter off\n"); 118 skb->data[0] = 0x00; /* Success */ 119 skb->data[1] = 0x00; 120 return; 121 } 122 if ((self->provider.filter_type == IRLAN_MULTICAST) && 123 (self->provider.filter_operation == GET)) 124 { 125 pr_debug("Multicast filter get\n"); 126 skb->data[0] = 0x00; /* Success? */ 127 skb->data[1] = 0x02; 128 irlan_insert_string_param(skb, "FILTER_MODE", "NONE"); 129 irlan_insert_short_param(skb, "MAX_ENTRY", 16); 130 return; 131 } 132 skb->data[0] = 0x00; /* Command not supported */ 133 skb->data[1] = 0x00; 134 135 pr_debug("Not implemented!\n"); 136} 137 138/* 139 * Function check_request_param (self, param, value) 140 * 141 * Check parameters in request from peer device 142 * 143 */ 144void irlan_check_command_param(struct irlan_cb *self, char *param, char *value) 145{ 146 IRDA_ASSERT(self != NULL, return;); 147 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;); 148 149 pr_debug("%s, %s\n", param, value); 150 151 /* 152 * This is experimental!! DB. 153 */ 154 if (strcmp(param, "MODE") == 0) { 155 self->use_udata = TRUE; 156 return; 157 } 158 159 /* 160 * FILTER_TYPE 161 */ 162 if (strcmp(param, "FILTER_TYPE") == 0) { 163 if (strcmp(value, "DIRECTED") == 0) { 164 self->provider.filter_type = IRLAN_DIRECTED; 165 return; 166 } 167 if (strcmp(value, "MULTICAST") == 0) { 168 self->provider.filter_type = IRLAN_MULTICAST; 169 return; 170 } 171 if (strcmp(value, "BROADCAST") == 0) { 172 self->provider.filter_type = IRLAN_BROADCAST; 173 return; 174 } 175 } 176 /* 177 * FILTER_MODE 178 */ 179 if (strcmp(param, "FILTER_MODE") == 0) { 180 if (strcmp(value, "ALL") == 0) { 181 self->provider.filter_mode = ALL; 182 return; 183 } 184 if (strcmp(value, "FILTER") == 0) { 185 self->provider.filter_mode = FILTER; 186 return; 187 } 188 if (strcmp(value, "NONE") == 0) { 189 self->provider.filter_mode = FILTER; 190 return; 191 } 192 } 193 /* 194 * FILTER_OPERATION 195 */ 196 if (strcmp(param, "FILTER_OPERATION") == 0) { 197 if (strcmp(value, "DYNAMIC") == 0) { 198 self->provider.filter_operation = DYNAMIC; 199 return; 200 } 201 if (strcmp(value, "GET") == 0) { 202 self->provider.filter_operation = GET; 203 return; 204 } 205 } 206} 207 208/* 209 * Function irlan_print_filter (filter_type, buf) 210 * 211 * Print status of filter. Used by /proc file system 212 * 213 */ 214#ifdef CONFIG_PROC_FS 215#define MASK2STR(m,s) { .mask = m, .str = s } 216 217void irlan_print_filter(struct seq_file *seq, int filter_type) 218{ 219 static struct { 220 int mask; 221 const char *str; 222 } filter_mask2str[] = { 223 MASK2STR(IRLAN_DIRECTED, "DIRECTED"), 224 MASK2STR(IRLAN_FUNCTIONAL, "FUNCTIONAL"), 225 MASK2STR(IRLAN_GROUP, "GROUP"), 226 MASK2STR(IRLAN_MAC_FRAME, "MAC_FRAME"), 227 MASK2STR(IRLAN_MULTICAST, "MULTICAST"), 228 MASK2STR(IRLAN_BROADCAST, "BROADCAST"), 229 MASK2STR(IRLAN_IPX_SOCKET, "IPX_SOCKET"), 230 MASK2STR(0, NULL) 231 }, *p; 232 233 for (p = filter_mask2str; p->str; p++) { 234 if (filter_type & p->mask) 235 seq_printf(seq, "%s ", p->str); 236 } 237 seq_putc(seq, '\n'); 238} 239#undef MASK2STR 240#endif 241