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_DEBUG(4, "%s()\n", __FUNCTION__ );
  76
  77         IRDA_ASSERT(self != NULL, return -1;);
  78
  79         switch(event) {
  80         case IRLAN_CONNECT_INDICATION:
  81              irlan_provider_connect_response( self, self->provider.tsap_ctrl);
  82              irlan_next_provider_state( self, IRLAN_INFO);
  83              break;
  84         default:
  85                 IRDA_DEBUG(4, "%s(), Unknown event %d\n", __FUNCTION__ , event);
  86                 break;
  87         }
  88         if (skb)
  89                 dev_kfree_skb(skb);
  90
  91         return 0;
  92 }
  93
  94 /*
  95  * Function irlan_provider_state_info (self, event, skb, info)
  96  *
  97  *    INFO, We have issued a GetInfo command and is awaiting a reply.
  98  */
  99 static int irlan_provider_state_info(struct irlan_cb *self, IRLAN_EVENT event,
 100                                      struct sk_buff *skb)
 101 {
 102         int ret;
 103
 104         IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
 105
 106         IRDA_ASSERT(self != NULL, return -1;);
 107
 108         switch(event) {
 109         case IRLAN_GET_INFO_CMD:
 110                 /* Be sure to use 802.3 in case of peer mode */
 111                 if (self->provider.access_type == ACCESS_PEER) {
 112                         self->media = MEDIA_802_3;
 113
 114                         /* Check if client has started yet */
 115                         if (self->client.state == IRLAN_IDLE) {
 116                                 /* This should get the client going */
 117                                 irlmp_discovery_request(8);
 118                         }
 119                 }
 120
 121                 irlan_provider_send_reply(self, CMD_GET_PROVIDER_INFO,
 122                                           RSP_SUCCESS);
 123                 /* Keep state */
 124                 break;
 125         case IRLAN_GET_MEDIA_CMD:
 126                 irlan_provider_send_reply(self, CMD_GET_MEDIA_CHAR,
 127                                           RSP_SUCCESS);
 128                 /* Keep state */
 129                 break;
 130         case IRLAN_OPEN_DATA_CMD:
 131                 ret = irlan_parse_open_data_cmd(self, skb);
 132                 if (self->provider.access_type == ACCESS_PEER) {
 133                         /* FIXME: make use of random functions! */
 134                         self->provider.send_arb_val = (jiffies & 0xffff);
 135                 }
 136                 irlan_provider_send_reply(self, CMD_OPEN_DATA_CHANNEL, ret);
 137
 138                 if (ret == RSP_SUCCESS) {
 139                         irlan_next_provider_state(self, IRLAN_OPEN);
 140
 141                         /* Signal client that we are now open */
 142                         irlan_do_client_event(self, IRLAN_PROVIDER_SIGNAL, NULL);
 143                 }
 144                 break;
 145         case IRLAN_LMP_DISCONNECT:  /* FALLTHROUGH */
 146         case IRLAN_LAP_DISCONNECT:
 147                 irlan_next_provider_state(self, IRLAN_IDLE);
 148                 break;
 149         default:
 150                 IRDA_DEBUG( 0, "%s(), Unknown event %d\n", __FUNCTION__ , event);
 151                 break;
 152         }
 153         if (skb)
 154                 dev_kfree_skb(skb);
 155
 156         return 0;
 157 }
 158
 159 /*
 160  * Function irlan_provider_state_open (self, event, skb, info)
 161  *
 162  *    OPEN, The client has issued a OpenData command and is awaiting a
 163  *    reply
 164  *
 165  */
 166 static int irlan_provider_state_open(struct irlan_cb *self, IRLAN_EVENT event,
 167                                      struct sk_buff *skb)
 168 {
 169         IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
 170
 171         IRDA_ASSERT(self != NULL, return -1;);
 172
 173         switch(event) {
 174         case IRLAN_FILTER_CONFIG_CMD:
 175                 irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
 176                 irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
 177                                           RSP_SUCCESS);
 178                 /* Keep state */
 179                 break;
 180         case IRLAN_DATA_CONNECT_INDICATION:
 181                 irlan_next_provider_state(self, IRLAN_DATA);
 182                 irlan_provider_connect_response(self, self->tsap_data);
 183                 break;
 184         case IRLAN_LMP_DISCONNECT:  /* FALLTHROUGH */
 185         case IRLAN_LAP_DISCONNECT:
 186                 irlan_next_provider_state(self, IRLAN_IDLE);
 187                 break;
 188         default:
 189                 IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
 190                 break;
 191         }
 192         if (skb)
 193                 dev_kfree_skb(skb);
 194
 195         return 0;
 196 }
 197
 198 /*
 199  * Function irlan_provider_state_data (self, event, skb, info)
 200  *
 201  *    DATA, The data channel is connected, allowing data transfers between
 202  *    the local and remote machines.
 203  *
 204  */
 205 static int irlan_provider_state_data(struct irlan_cb *self, IRLAN_EVENT event,
 206                                      struct sk_buff *skb)
 207 {
 208         IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
 209
 210         IRDA_ASSERT(self != NULL, return -1;);
 211         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
 212
 213         switch(event) {
 214         case IRLAN_FILTER_CONFIG_CMD:
 215                 irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
 216                 irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
 217                                           RSP_SUCCESS);
 218                 break;
 219         case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
 220         case IRLAN_LAP_DISCONNECT:
 221                 irlan_next_provider_state(self, IRLAN_IDLE);
 222                 break;
 223         default:
 224                 IRDA_DEBUG( 0, "%s(), Unknown event %d\n", __FUNCTION__ , event);
 225                 break;
 226         }
 227         if (skb)
 228                 dev_kfree_skb(skb);
 229
 230         return 0;
 231 }
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