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 Troms� 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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 IRDA_DEBUG(0, "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 __u8 *bytes; 147 148 IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); 149 150 bytes = value; 151 152 IRDA_ASSERT(self != NULL, return;); 153 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;); 154 155 IRDA_DEBUG(4, "%s, %s\n", param, value); 156 157 /* 158 * This is experimental!! DB. 159 */ 160 if (strcmp(param, "MODE") == 0) { 161 IRDA_DEBUG(0, "%s()\n", __FUNCTION__ ); 162 self->use_udata = TRUE; 163 return; 164 } 165 166 /* 167 * FILTER_TYPE 168 */ 169 if (strcmp(param, "FILTER_TYPE") == 0) { 170 if (strcmp(value, "DIRECTED") == 0) { 171 self->provider.filter_type = IRLAN_DIRECTED; 172 return; 173 } 174 if (strcmp(value, "MULTICAST") == 0) { 175 self->provider.filter_type = IRLAN_MULTICAST; 176 return; 177 } 178 if (strcmp(value, "BROADCAST") == 0) { 179 self->provider.filter_type = IRLAN_BROADCAST; 180 return; 181 } 182 } 183 /* 184 * FILTER_MODE 185 */ 186 if (strcmp(param, "FILTER_MODE") == 0) { 187 if (strcmp(value, "ALL") == 0) { 188 self->provider.filter_mode = ALL; 189 return; 190 } 191 if (strcmp(value, "FILTER") == 0) { 192 self->provider.filter_mode = FILTER; 193 return; 194 } 195 if (strcmp(value, "NONE") == 0) { 196 self->provider.filter_mode = FILTER; 197 return; 198 } 199 } 200 /* 201 * FILTER_OPERATION 202 */ 203 if (strcmp(param, "FILTER_OPERATION") == 0) { 204 if (strcmp(value, "DYNAMIC") == 0) { 205 self->provider.filter_operation = DYNAMIC; 206 return; 207 } 208 if (strcmp(value, "GET") == 0) { 209 self->provider.filter_operation = GET; 210 return; 211 } 212 } 213} 214 215/* 216 * Function irlan_print_filter (filter_type, buf) 217 * 218 * Print status of filter. Used by /proc file system 219 * 220 */ 221#ifdef CONFIG_PROC_FS 222#define MASK2STR(m,s) { .mask = m, .str = s } 223 224void irlan_print_filter(struct seq_file *seq, int filter_type) 225{ 226 static struct { 227 int mask; 228 const char *str; 229 } filter_mask2str[] = { 230 MASK2STR(IRLAN_DIRECTED, "DIRECTED"), 231 MASK2STR(IRLAN_FUNCTIONAL, "FUNCTIONAL"), 232 MASK2STR(IRLAN_GROUP, "GROUP"), 233 MASK2STR(IRLAN_MAC_FRAME, "MAC_FRAME"), 234 MASK2STR(IRLAN_MULTICAST, "MULTICAST"), 235 MASK2STR(IRLAN_BROADCAST, "BROADCAST"), 236 MASK2STR(IRLAN_IPX_SOCKET, "IPX_SOCKET"), 237 MASK2STR(0, NULL) 238 }, *p; 239 240 for (p = filter_mask2str; p->str; p++) { 241 if (filter_type & p->mask) 242 seq_printf(seq, "%s ", p->str); 243 } 244 seq_putc(seq, '\n'); 245} 246#undef MASK2STR 247#endif 248