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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 | /********************************************************************* * * Filename: ircomm_event.c * Version: 1.0 * Description: IrCOMM layer state machine * Status: Stable * Author: Dag Brattli <dagb@cs.uit.no> * Created at: Sun Jun 6 20:33:11 1999 * Modified at: Sun Dec 12 13:44:32 1999 * Modified by: Dag Brattli <dagb@cs.uit.no> * * Copyright (c) 1999 Dag Brattli, All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * ********************************************************************/ #include <linux/proc_fs.h> #include <linux/init.h> #include <net/irda/irda.h> #include <net/irda/irlmp.h> #include <net/irda/iriap.h> #include <net/irda/irttp.h> #include <net/irda/irias_object.h> #include <net/irda/ircomm_core.h> #include <net/irda/ircomm_event.h> static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info); static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info); static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info); static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info); const char *const ircomm_state[] = { "IRCOMM_IDLE", "IRCOMM_WAITI", "IRCOMM_WAITR", "IRCOMM_CONN", }; #ifdef CONFIG_IRDA_DEBUG static const char *const ircomm_event[] = { "IRCOMM_CONNECT_REQUEST", "IRCOMM_CONNECT_RESPONSE", "IRCOMM_TTP_CONNECT_INDICATION", "IRCOMM_LMP_CONNECT_INDICATION", "IRCOMM_TTP_CONNECT_CONFIRM", "IRCOMM_LMP_CONNECT_CONFIRM", "IRCOMM_LMP_DISCONNECT_INDICATION", "IRCOMM_TTP_DISCONNECT_INDICATION", "IRCOMM_DISCONNECT_REQUEST", "IRCOMM_TTP_DATA_INDICATION", "IRCOMM_LMP_DATA_INDICATION", "IRCOMM_DATA_REQUEST", "IRCOMM_CONTROL_REQUEST", "IRCOMM_CONTROL_INDICATION", }; #endif /* CONFIG_IRDA_DEBUG */ static int (*state[])(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info) = { ircomm_state_idle, ircomm_state_waiti, ircomm_state_waitr, ircomm_state_conn, }; /* * Function ircomm_state_idle (self, event, skb) * * IrCOMM is currently idle * */ static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info) { int ret = 0; switch (event) { case IRCOMM_CONNECT_REQUEST: ircomm_next_state(self, IRCOMM_WAITI); ret = self->issue.connect_request(self, skb, info); break; case IRCOMM_TTP_CONNECT_INDICATION: case IRCOMM_LMP_CONNECT_INDICATION: ircomm_next_state(self, IRCOMM_WAITR); ircomm_connect_indication(self, skb, info); break; default: IRDA_DEBUG(4, "%s(), unknown event: %s\n", __func__ , ircomm_event[event]); ret = -EINVAL; } return ret; } /* * Function ircomm_state_waiti (self, event, skb) * * The IrCOMM user has requested an IrCOMM connection to the remote * device and is awaiting confirmation */ static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info) { int ret = 0; switch (event) { case IRCOMM_TTP_CONNECT_CONFIRM: case IRCOMM_LMP_CONNECT_CONFIRM: ircomm_next_state(self, IRCOMM_CONN); ircomm_connect_confirm(self, skb, info); break; case IRCOMM_TTP_DISCONNECT_INDICATION: case IRCOMM_LMP_DISCONNECT_INDICATION: ircomm_next_state(self, IRCOMM_IDLE); ircomm_disconnect_indication(self, skb, info); break; default: IRDA_DEBUG(0, "%s(), unknown event: %s\n", __func__ , ircomm_event[event]); ret = -EINVAL; } return ret; } /* * Function ircomm_state_waitr (self, event, skb) * * IrCOMM has received an incoming connection request and is awaiting * response from the user */ static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info) { int ret = 0; switch (event) { case IRCOMM_CONNECT_RESPONSE: ircomm_next_state(self, IRCOMM_CONN); ret = self->issue.connect_response(self, skb); break; case IRCOMM_DISCONNECT_REQUEST: ircomm_next_state(self, IRCOMM_IDLE); ret = self->issue.disconnect_request(self, skb, info); break; case IRCOMM_TTP_DISCONNECT_INDICATION: case IRCOMM_LMP_DISCONNECT_INDICATION: ircomm_next_state(self, IRCOMM_IDLE); ircomm_disconnect_indication(self, skb, info); break; default: IRDA_DEBUG(0, "%s(), unknown event = %s\n", __func__ , ircomm_event[event]); ret = -EINVAL; } return ret; } /* * Function ircomm_state_conn (self, event, skb) * * IrCOMM is connected to the peer IrCOMM device * */ static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info) { int ret = 0; switch (event) { case IRCOMM_DATA_REQUEST: ret = self->issue.data_request(self, skb, 0); break; case IRCOMM_TTP_DATA_INDICATION: ircomm_process_data(self, skb); break; case IRCOMM_LMP_DATA_INDICATION: ircomm_data_indication(self, skb); break; case IRCOMM_CONTROL_REQUEST: /* Just send a separate frame for now */ ret = self->issue.data_request(self, skb, skb->len); break; case IRCOMM_TTP_DISCONNECT_INDICATION: case IRCOMM_LMP_DISCONNECT_INDICATION: ircomm_next_state(self, IRCOMM_IDLE); ircomm_disconnect_indication(self, skb, info); break; case IRCOMM_DISCONNECT_REQUEST: ircomm_next_state(self, IRCOMM_IDLE); ret = self->issue.disconnect_request(self, skb, info); break; default: IRDA_DEBUG(0, "%s(), unknown event = %s\n", __func__ , ircomm_event[event]); ret = -EINVAL; } return ret; } /* * Function ircomm_do_event (self, event, skb) * * Process event * */ int ircomm_do_event(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info) { IRDA_DEBUG(4, "%s: state=%s, event=%s\n", __func__ , ircomm_state[self->state], ircomm_event[event]); return (*state[self->state])(self, event, skb, info); } /* * Function ircomm_next_state (self, state) * * Switch state * */ void ircomm_next_state(struct ircomm_cb *self, IRCOMM_STATE state) { self->state = state; IRDA_DEBUG(4, "%s: next state=%s, service type=%d\n", __func__ , ircomm_state[self->state], self->service_type); } |