kernel/net/irda/irlan/irlan_provider_event.c

   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
  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  */
  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  */
  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  */
 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  */
 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 }
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233