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