1 /*********************************************************************
2 *
3 * Filename: irlan_provider_event.c
4 * Version: 0.9
5 * Description: IrLAN provider state machine)
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun Aug 31 20:14:37 1997
9 * Modified at: Sat Oct 30 12:52:41 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>, 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 <net/irda/irda.h>
26 #include <net/irda/iriap.h>
27 #include <net/irda/irlmp.h>
28 #include <net/irda/irttp.h>
29
30 #include <net/irda/irlan_provider.h>
31 #include <net/irda/irlan_event.h>
32
33 static int irlan_provider_state_idle(struct irlan_cb *self, IRLAN_EVENT event,
34 struct sk_buff *skb);
35 static int irlan_provider_state_info(struct irlan_cb *self, IRLAN_EVENT event,
36 struct sk_buff *skb);
37 static int irlan_provider_state_open(struct irlan_cb *self, IRLAN_EVENT event,
38 struct sk_buff *skb);
39 static int irlan_provider_state_data(struct irlan_cb *self, IRLAN_EVENT event,
40 struct sk_buff *skb);
41
42 static int (*state[])(struct irlan_cb *self, IRLAN_EVENT event,
43 struct sk_buff *skb) =
44 {
45 irlan_provider_state_idle,
46 NULL, /* Query */
47 NULL, /* Info */
48 irlan_provider_state_info,
49 NULL, /* Media */
50 irlan_provider_state_open,
51 NULL, /* Wait */
52 NULL, /* Arb */
53 irlan_provider_state_data,
54 NULL, /* Close */
55 NULL, /* Sync */
56 };
57
irlan_do_provider_event(struct irlan_cb * self,IRLAN_EVENT event,struct sk_buff * skb)58 void irlan_do_provider_event(struct irlan_cb *self, IRLAN_EVENT event,
59 struct sk_buff *skb)
60 {
61 IRDA_ASSERT(*state[ self->provider.state] != NULL, return;);
62
63 (*state[self->provider.state]) (self, event, skb);
64 }
65
66 /*
67 * Function irlan_provider_state_idle (event, skb, info)
68 *
69 * IDLE, We are waiting for an indication that there is a provider
70 * available.
71 */
irlan_provider_state_idle(struct irlan_cb * self,IRLAN_EVENT event,struct sk_buff * skb)72 static int irlan_provider_state_idle(struct irlan_cb *self, IRLAN_EVENT event,
73 struct sk_buff *skb)
74 {
75 IRDA_ASSERT(self != NULL, return -1;);
76
77 switch(event) {
78 case IRLAN_CONNECT_INDICATION:
79 irlan_provider_connect_response( self, self->provider.tsap_ctrl);
80 irlan_next_provider_state( self, IRLAN_INFO);
81 break;
82 default:
83 pr_debug("%s(), Unknown event %d\n", __func__ , event);
84 break;
85 }
86 if (skb)
87 dev_kfree_skb(skb);
88
89 return 0;
90 }
91
92 /*
93 * Function irlan_provider_state_info (self, event, skb, info)
94 *
95 * INFO, We have issued a GetInfo command and is awaiting a reply.
96 */
irlan_provider_state_info(struct irlan_cb * self,IRLAN_EVENT event,struct sk_buff * skb)97 static int irlan_provider_state_info(struct irlan_cb *self, IRLAN_EVENT event,
98 struct sk_buff *skb)
99 {
100 int ret;
101
102 IRDA_ASSERT(self != NULL, return -1;);
103
104 switch(event) {
105 case IRLAN_GET_INFO_CMD:
106 /* Be sure to use 802.3 in case of peer mode */
107 if (self->provider.access_type == ACCESS_PEER) {
108 self->media = MEDIA_802_3;
109
110 /* Check if client has started yet */
111 if (self->client.state == IRLAN_IDLE) {
112 /* This should get the client going */
113 irlmp_discovery_request(8);
114 }
115 }
116
117 irlan_provider_send_reply(self, CMD_GET_PROVIDER_INFO,
118 RSP_SUCCESS);
119 /* Keep state */
120 break;
121 case IRLAN_GET_MEDIA_CMD:
122 irlan_provider_send_reply(self, CMD_GET_MEDIA_CHAR,
123 RSP_SUCCESS);
124 /* Keep state */
125 break;
126 case IRLAN_OPEN_DATA_CMD:
127 ret = irlan_parse_open_data_cmd(self, skb);
128 if (self->provider.access_type == ACCESS_PEER) {
129 /* FIXME: make use of random functions! */
130 self->provider.send_arb_val = (jiffies & 0xffff);
131 }
132 irlan_provider_send_reply(self, CMD_OPEN_DATA_CHANNEL, ret);
133
134 if (ret == RSP_SUCCESS) {
135 irlan_next_provider_state(self, IRLAN_OPEN);
136
137 /* Signal client that we are now open */
138 irlan_do_client_event(self, IRLAN_PROVIDER_SIGNAL, NULL);
139 }
140 break;
141 case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
142 case IRLAN_LAP_DISCONNECT:
143 irlan_next_provider_state(self, IRLAN_IDLE);
144 break;
145 default:
146 pr_debug("%s(), Unknown event %d\n", __func__ , event);
147 break;
148 }
149 if (skb)
150 dev_kfree_skb(skb);
151
152 return 0;
153 }
154
155 /*
156 * Function irlan_provider_state_open (self, event, skb, info)
157 *
158 * OPEN, The client has issued a OpenData command and is awaiting a
159 * reply
160 *
161 */
irlan_provider_state_open(struct irlan_cb * self,IRLAN_EVENT event,struct sk_buff * skb)162 static int irlan_provider_state_open(struct irlan_cb *self, IRLAN_EVENT event,
163 struct sk_buff *skb)
164 {
165 IRDA_ASSERT(self != NULL, return -1;);
166
167 switch(event) {
168 case IRLAN_FILTER_CONFIG_CMD:
169 irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
170 irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
171 RSP_SUCCESS);
172 /* Keep state */
173 break;
174 case IRLAN_DATA_CONNECT_INDICATION:
175 irlan_next_provider_state(self, IRLAN_DATA);
176 irlan_provider_connect_response(self, self->tsap_data);
177 break;
178 case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
179 case IRLAN_LAP_DISCONNECT:
180 irlan_next_provider_state(self, IRLAN_IDLE);
181 break;
182 default:
183 pr_debug("%s(), Unknown event %d\n", __func__ , event);
184 break;
185 }
186 if (skb)
187 dev_kfree_skb(skb);
188
189 return 0;
190 }
191
192 /*
193 * Function irlan_provider_state_data (self, event, skb, info)
194 *
195 * DATA, The data channel is connected, allowing data transfers between
196 * the local and remote machines.
197 *
198 */
irlan_provider_state_data(struct irlan_cb * self,IRLAN_EVENT event,struct sk_buff * skb)199 static int irlan_provider_state_data(struct irlan_cb *self, IRLAN_EVENT event,
200 struct sk_buff *skb)
201 {
202 IRDA_ASSERT(self != NULL, return -1;);
203 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
204
205 switch(event) {
206 case IRLAN_FILTER_CONFIG_CMD:
207 irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
208 irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
209 RSP_SUCCESS);
210 break;
211 case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
212 case IRLAN_LAP_DISCONNECT:
213 irlan_next_provider_state(self, IRLAN_IDLE);
214 break;
215 default:
216 pr_debug("%s(), Unknown event %d\n", __func__ , event);
217 break;
218 }
219 if (skb)
220 dev_kfree_skb(skb);
221
222 return 0;
223 }
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