+++ /dev/null
-/*********************************************************************
- *
- * Filename: ircomm_ttp.c
- * Version: 1.0
- * Description: Interface between IrCOMM and IrTTP
- * Status: Stable
- * Author: Dag Brattli <dagb@cs.uit.no>
- * Created at: Sun Jun 6 20:48:27 1999
- * Modified at: Mon Dec 13 11:35:13 1999
- * Modified by: Dag Brattli <dagb@cs.uit.no>
- *
- * Copyright (c) 1999 Dag Brattli, 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.
- *
- * 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, see <http://www.gnu.org/licenses/>.
- *
- ********************************************************************/
-
-#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/ircomm_event.h>
-#include <net/irda/ircomm_ttp.h>
-
-static int ircomm_ttp_data_indication(void *instance, void *sap,
- struct sk_buff *skb);
-static void ircomm_ttp_connect_confirm(void *instance, void *sap,
- struct qos_info *qos,
- __u32 max_sdu_size,
- __u8 max_header_size,
- struct sk_buff *skb);
-static void ircomm_ttp_connect_indication(void *instance, void *sap,
- struct qos_info *qos,
- __u32 max_sdu_size,
- __u8 max_header_size,
- struct sk_buff *skb);
-static void ircomm_ttp_flow_indication(void *instance, void *sap,
- LOCAL_FLOW cmd);
-static void ircomm_ttp_disconnect_indication(void *instance, void *sap,
- LM_REASON reason,
- struct sk_buff *skb);
-static int ircomm_ttp_data_request(struct ircomm_cb *self,
- struct sk_buff *skb,
- int clen);
-static int ircomm_ttp_connect_request(struct ircomm_cb *self,
- struct sk_buff *userdata,
- struct ircomm_info *info);
-static int ircomm_ttp_connect_response(struct ircomm_cb *self,
- struct sk_buff *userdata);
-static int ircomm_ttp_disconnect_request(struct ircomm_cb *self,
- struct sk_buff *userdata,
- struct ircomm_info *info);
-
-/*
- * Function ircomm_open_tsap (self)
- *
- *
- *
- */
-int ircomm_open_tsap(struct ircomm_cb *self)
-{
- notify_t notify;
-
- /* Register callbacks */
- irda_notify_init(¬ify);
- notify.data_indication = ircomm_ttp_data_indication;
- notify.connect_confirm = ircomm_ttp_connect_confirm;
- notify.connect_indication = ircomm_ttp_connect_indication;
- notify.flow_indication = ircomm_ttp_flow_indication;
- notify.disconnect_indication = ircomm_ttp_disconnect_indication;
- notify.instance = self;
- strlcpy(notify.name, "IrCOMM", sizeof(notify.name));
-
- self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT,
- ¬ify);
- if (!self->tsap) {
- pr_debug("%sfailed to allocate tsap\n", __func__);
- return -1;
- }
- self->slsap_sel = self->tsap->stsap_sel;
-
- /*
- * Initialize the call-table for issuing commands
- */
- self->issue.data_request = ircomm_ttp_data_request;
- self->issue.connect_request = ircomm_ttp_connect_request;
- self->issue.connect_response = ircomm_ttp_connect_response;
- self->issue.disconnect_request = ircomm_ttp_disconnect_request;
-
- return 0;
-}
-
-/*
- * Function ircomm_ttp_connect_request (self, userdata)
- *
- *
- *
- */
-static int ircomm_ttp_connect_request(struct ircomm_cb *self,
- struct sk_buff *userdata,
- struct ircomm_info *info)
-{
- int ret = 0;
-
- /* Don't forget to refcount it - should be NULL anyway */
- if(userdata)
- skb_get(userdata);
-
- ret = irttp_connect_request(self->tsap, info->dlsap_sel,
- info->saddr, info->daddr, NULL,
- TTP_SAR_DISABLE, userdata);
-
- return ret;
-}
-
-/*
- * Function ircomm_ttp_connect_response (self, skb)
- *
- *
- *
- */
-static int ircomm_ttp_connect_response(struct ircomm_cb *self,
- struct sk_buff *userdata)
-{
- int ret;
-
- /* Don't forget to refcount it - should be NULL anyway */
- if(userdata)
- skb_get(userdata);
-
- ret = irttp_connect_response(self->tsap, TTP_SAR_DISABLE, userdata);
-
- return ret;
-}
-
-/*
- * Function ircomm_ttp_data_request (self, userdata)
- *
- * Send IrCOMM data to IrTTP layer. Currently we do not try to combine
- * control data with pure data, so they will be sent as separate frames.
- * Should not be a big problem though, since control frames are rare. But
- * some of them are sent after connection establishment, so this can
- * increase the latency a bit.
- */
-static int ircomm_ttp_data_request(struct ircomm_cb *self,
- struct sk_buff *skb,
- int clen)
-{
- int ret;
-
- IRDA_ASSERT(skb != NULL, return -1;);
-
- pr_debug("%s(), clen=%d\n", __func__ , clen);
-
- /*
- * Insert clen field, currently we either send data only, or control
- * only frames, to make things easier and avoid queueing
- */
- IRDA_ASSERT(skb_headroom(skb) >= IRCOMM_HEADER_SIZE, return -1;);
-
- /* Don't forget to refcount it - see ircomm_tty_do_softint() */
- skb_get(skb);
-
- skb_push(skb, IRCOMM_HEADER_SIZE);
-
- skb->data[0] = clen;
-
- ret = irttp_data_request(self->tsap, skb);
- if (ret) {
- net_err_ratelimited("%s(), failed\n", __func__);
- /* irttp_data_request already free the packet */
- }
-
- return ret;
-}
-
-/*
- * Function ircomm_ttp_data_indication (instance, sap, skb)
- *
- * Incoming data
- *
- */
-static int ircomm_ttp_data_indication(void *instance, void *sap,
- struct sk_buff *skb)
-{
- struct ircomm_cb *self = (struct ircomm_cb *) instance;
-
- IRDA_ASSERT(self != NULL, return -1;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
- IRDA_ASSERT(skb != NULL, return -1;);
-
- ircomm_do_event(self, IRCOMM_TTP_DATA_INDICATION, skb, NULL);
-
- /* Drop reference count - see ircomm_tty_data_indication(). */
- dev_kfree_skb(skb);
-
- return 0;
-}
-
-static void ircomm_ttp_connect_confirm(void *instance, void *sap,
- struct qos_info *qos,
- __u32 max_sdu_size,
- __u8 max_header_size,
- struct sk_buff *skb)
-{
- struct ircomm_cb *self = (struct ircomm_cb *) instance;
- struct ircomm_info info;
-
- IRDA_ASSERT(self != NULL, return;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
- IRDA_ASSERT(skb != NULL, return;);
- IRDA_ASSERT(qos != NULL, goto out;);
-
- if (max_sdu_size != TTP_SAR_DISABLE) {
- net_err_ratelimited("%s(), SAR not allowed for IrCOMM!\n",
- __func__);
- goto out;
- }
-
- info.max_data_size = irttp_get_max_seg_size(self->tsap)
- - IRCOMM_HEADER_SIZE;
- info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;
- info.qos = qos;
-
- ircomm_do_event(self, IRCOMM_TTP_CONNECT_CONFIRM, skb, &info);
-
-out:
- /* Drop reference count - see ircomm_tty_connect_confirm(). */
- dev_kfree_skb(skb);
-}
-
-/*
- * Function ircomm_ttp_connect_indication (instance, sap, qos, max_sdu_size,
- * max_header_size, skb)
- *
- *
- *
- */
-static void ircomm_ttp_connect_indication(void *instance, void *sap,
- struct qos_info *qos,
- __u32 max_sdu_size,
- __u8 max_header_size,
- struct sk_buff *skb)
-{
- struct ircomm_cb *self = (struct ircomm_cb *)instance;
- struct ircomm_info info;
-
- IRDA_ASSERT(self != NULL, return;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
- IRDA_ASSERT(skb != NULL, return;);
- IRDA_ASSERT(qos != NULL, goto out;);
-
- if (max_sdu_size != TTP_SAR_DISABLE) {
- net_err_ratelimited("%s(), SAR not allowed for IrCOMM!\n",
- __func__);
- goto out;
- }
-
- info.max_data_size = irttp_get_max_seg_size(self->tsap)
- - IRCOMM_HEADER_SIZE;
- info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;
- info.qos = qos;
-
- ircomm_do_event(self, IRCOMM_TTP_CONNECT_INDICATION, skb, &info);
-
-out:
- /* Drop reference count - see ircomm_tty_connect_indication(). */
- dev_kfree_skb(skb);
-}
-
-/*
- * Function ircomm_ttp_disconnect_request (self, userdata, info)
- *
- *
- *
- */
-static int ircomm_ttp_disconnect_request(struct ircomm_cb *self,
- struct sk_buff *userdata,
- struct ircomm_info *info)
-{
- int ret;
-
- /* Don't forget to refcount it - should be NULL anyway */
- if(userdata)
- skb_get(userdata);
-
- ret = irttp_disconnect_request(self->tsap, userdata, P_NORMAL);
-
- return ret;
-}
-
-/*
- * Function ircomm_ttp_disconnect_indication (instance, sap, reason, skb)
- *
- *
- *
- */
-static void ircomm_ttp_disconnect_indication(void *instance, void *sap,
- LM_REASON reason,
- struct sk_buff *skb)
-{
- struct ircomm_cb *self = (struct ircomm_cb *) instance;
- struct ircomm_info info;
-
- IRDA_ASSERT(self != NULL, return;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
-
- info.reason = reason;
-
- ircomm_do_event(self, IRCOMM_TTP_DISCONNECT_INDICATION, skb, &info);
-
- /* Drop reference count - see ircomm_tty_disconnect_indication(). */
- if(skb)
- dev_kfree_skb(skb);
-}
-
-/*
- * Function ircomm_ttp_flow_indication (instance, sap, cmd)
- *
- * Layer below is telling us to start or stop the flow of data
- *
- */
-static void ircomm_ttp_flow_indication(void *instance, void *sap,
- LOCAL_FLOW cmd)
-{
- struct ircomm_cb *self = (struct ircomm_cb *) instance;
-
- IRDA_ASSERT(self != NULL, return;);
- IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
-
- if (self->notify.flow_indication)
- self->notify.flow_indication(self->notify.instance, self, cmd);
-}
-
-
projects / linux-2.6-block.git / blobdiff