/********************************************************************* * * Filename: iriap_event.c * Version: 0.1 * Description: IAP Finite State Machine * Status: Experimental. * Author: Dag Brattli <dagb@cs.uit.no> * Created at: Thu Aug 21 00:02:07 1997 * Modified at: Wed Mar 1 11:28:34 2000 * Modified by: Dag Brattli <dagb@cs.uit.no> * * Copyright (c) 1997, 1999-2000 Dag Brattli <dagb@cs.uit.no>, * All Rights Reserved. * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> * * 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. * * Neither Dag Brattli nor University of Troms� admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. * ********************************************************************/ #include <net/irda/irda.h> #include <net/irda/irlmp.h> #include <net/irda/iriap.h> #include <net/irda/iriap_event.h> static void state_s_disconnect (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_connecting (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_call (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_make_call (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_calling (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_outstanding (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_replying (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_wait_for_call(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_s_wait_active (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_r_disconnect (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_r_call (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_r_waiting (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_r_wait_active (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_r_receiving (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_r_execute (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void state_r_returning (struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb); static void (*iriap_state[])(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) = { /* Client FSM */ state_s_disconnect, state_s_connecting, state_s_call, /* S-Call FSM */ state_s_make_call, state_s_calling, state_s_outstanding, state_s_replying, state_s_wait_for_call, state_s_wait_active, /* Server FSM */ state_r_disconnect, state_r_call, /* R-Connect FSM */ state_r_waiting, state_r_wait_active, state_r_receiving, state_r_execute, state_r_returning, }; void iriap_next_client_state(struct iriap_cb *self, IRIAP_STATE state) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); self->client_state = state; } void iriap_next_call_state(struct iriap_cb *self, IRIAP_STATE state) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); self->call_state = state; } void iriap_next_server_state(struct iriap_cb *self, IRIAP_STATE state) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); self->server_state = state; } void iriap_next_r_connect_state(struct iriap_cb *self, IRIAP_STATE state) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); self->r_connect_state = state; } void iriap_do_client_event(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); (*iriap_state[ self->client_state]) (self, event, skb); } void iriap_do_call_event(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); (*iriap_state[ self->call_state]) (self, event, skb); } void iriap_do_server_event(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); (*iriap_state[ self->server_state]) (self, event, skb); } void iriap_do_r_connect_event(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); (*iriap_state[ self->r_connect_state]) (self, event, skb); } /* * Function state_s_disconnect (event, skb) * * S-Disconnect, The device has no LSAP connection to a particular * remote device. */ static void state_s_disconnect(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); switch (event) { case IAP_CALL_REQUEST_GVBC: iriap_next_client_state(self, S_CONNECTING); IRDA_ASSERT(self->request_skb == NULL, return;); /* Don't forget to refcount it - * see iriap_getvaluebyclass_request(). */ skb_get(skb); self->request_skb = skb; iriap_connect_request(self); break; case IAP_LM_DISCONNECT_INDICATION: break; default: IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event); break; } } /* * Function state_s_connecting (self, event, skb) * * S-Connecting * */ static void state_s_connecting(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); switch (event) { case IAP_LM_CONNECT_CONFIRM: /* * Jump to S-Call FSM */ iriap_do_call_event(self, IAP_CALL_REQUEST, skb); /* iriap_call_request(self, 0,0,0); */ iriap_next_client_state(self, S_CALL); break; case IAP_LM_DISCONNECT_INDICATION: /* Abort calls */ iriap_next_call_state(self, S_MAKE_CALL); iriap_next_client_state(self, S_DISCONNECT); break; default: IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event); break; } } /* * Function state_s_call (self, event, skb) * * S-Call, The device can process calls to a specific remote * device. Whenever the LSAP connection is disconnected, this state * catches that event and clears up */ static void state_s_call(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); switch (event) { case IAP_LM_DISCONNECT_INDICATION: /* Abort calls */ iriap_next_call_state(self, S_MAKE_CALL); iriap_next_client_state(self, S_DISCONNECT); break; default: IRDA_DEBUG(0, "state_s_call: Unknown event %d\n", event); break; } } /* * Function state_s_make_call (event, skb) * * S-Make-Call * */ static void state_s_make_call(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { struct sk_buff *tx_skb; IRDA_ASSERT(self != NULL, return;); switch (event) { case IAP_CALL_REQUEST: /* Already refcounted - see state_s_disconnect() */ tx_skb = self->request_skb; self->request_skb = NULL; irlmp_data_request(self->lsap, tx_skb); iriap_next_call_state(self, S_OUTSTANDING); break; default: IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event); break; } } /* * Function state_s_calling (event, skb) * * S-Calling * */ static void state_s_calling(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__); } /* * Function state_s_outstanding (event, skb) * * S-Outstanding, The device is waiting for a response to a command * */ static void state_s_outstanding(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_ASSERT(self != NULL, return;); switch (event) { case IAP_RECV_F_LST: /*iriap_send_ack(self);*/ /*LM_Idle_request(idle); */ iriap_next_call_state(self, S_WAIT_FOR_CALL); break; default: IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event); break; } } /* * Function state_s_replying (event, skb) * * S-Replying, The device is collecting a multiple part response */ static void state_s_replying(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__); } /* * Function state_s_wait_for_call (event, skb) * * S-Wait-for-Call * */ static void state_s_wait_for_call(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__); } /* * Function state_s_wait_active (event, skb) * * S-Wait-Active * */ static void state_s_wait_active(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__); } /************************************************************************** * * Server FSM * **************************************************************************/ /* * Function state_r_disconnect (self, event, skb) * * LM-IAS server is disconnected (not processing any requests!) * */ static void state_r_disconnect(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { struct sk_buff *tx_skb; switch (event) { case IAP_LM_CONNECT_INDICATION: tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC); if (tx_skb == NULL) { IRDA_WARNING("%s: unable to malloc!\n", __FUNCTION__); return; } /* Reserve space for MUX_CONTROL and LAP header */ skb_reserve(tx_skb, LMP_MAX_HEADER); irlmp_connect_response(self->lsap, tx_skb); /*LM_Idle_request(idle); */ iriap_next_server_state(self, R_CALL); /* * Jump to R-Connect FSM, we skip R-Waiting since we do not * care about LM_Idle_request()! */ iriap_next_r_connect_state(self, R_RECEIVING); break; default: IRDA_DEBUG(0, "%s(), unknown event %d\n", __FUNCTION__, event); break; } } /* * Function state_r_call (self, event, skb) */ static void state_r_call(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(4, "%s()\n", __FUNCTION__); switch (event) { case IAP_LM_DISCONNECT_INDICATION: /* Abort call */ iriap_next_server_state(self, R_DISCONNECT); iriap_next_r_connect_state(self, R_WAITING); break; default: IRDA_DEBUG(0, "%s(), unknown event!\n", __FUNCTION__); break; } } /* * R-Connect FSM */ /* * Function state_r_waiting (self, event, skb) */ static void state_r_waiting(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__); } static void state_r_wait_active(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__); } /* * Function state_r_receiving (self, event, skb) * * We are receiving a command * */ static void state_r_receiving(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(4, "%s()\n", __FUNCTION__); switch (event) { case IAP_RECV_F_LST: iriap_next_r_connect_state(self, R_EXECUTE); iriap_call_indication(self, skb); break; default: IRDA_DEBUG(0, "%s(), unknown event!\n", __FUNCTION__); break; } } /* * Function state_r_execute (self, event, skb) * * The server is processing the request * */ static void state_r_execute(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(4, "%s()\n", __FUNCTION__); IRDA_ASSERT(skb != NULL, return;); IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IAS_MAGIC, return;); switch (event) { case IAP_CALL_RESPONSE: /* * Since we don't implement the Waiting state, we return * to state Receiving instead, DB. */ iriap_next_r_connect_state(self, R_RECEIVING); /* Don't forget to refcount it - see * iriap_getvaluebyclass_response(). */ skb_get(skb); irlmp_data_request(self->lsap, skb); break; default: IRDA_DEBUG(0, "%s(), unknown event!\n", __FUNCTION__); break; } } static void state_r_returning(struct iriap_cb *self, IRIAP_EVENT event, struct sk_buff *skb) { IRDA_DEBUG(0, "%s(), event=%d\n", __FUNCTION__, event); switch (event) { case IAP_RECV_F_LST: break; default: break; } }