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