| 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 | */ |
| 38 | void 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 | */ |
| 144 | void irlan_check_command_param(struct irlan_cb *self, char *param, char *value) |
| 145 | { |
| 146 | __u8 *bytes; |
| 147 | |
| 148 | IRDA_DEBUG(4, "%s()\n", __func__ ); |
| 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", __func__ ); |
| 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 | |
| 224 | void 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 |