/*********************************************************************
|
/*********************************************************************
|
*
|
*
|
* Filename: irlap_frame.c
|
* Filename: irlap_frame.c
|
* Version: 1.0
|
* Version: 1.0
|
* Description: Build and transmit IrLAP frames
|
* Description: Build and transmit IrLAP frames
|
* Status: Stable
|
* Status: Stable
|
* Author: Dag Brattli <dagb@cs.uit.no>
|
* Author: Dag Brattli <dagb@cs.uit.no>
|
* Created at: Tue Aug 19 10:27:26 1997
|
* Created at: Tue Aug 19 10:27:26 1997
|
* Modified at: Wed Jan 5 08:59:04 2000
|
* Modified at: Wed Jan 5 08:59:04 2000
|
* Modified by: Dag Brattli <dagb@cs.uit.no>
|
* Modified by: Dag Brattli <dagb@cs.uit.no>
|
*
|
*
|
* Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>,
|
* Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>,
|
* All Rights Reserved.
|
* All Rights Reserved.
|
* Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com>
|
* Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com>
|
*
|
*
|
* This program is free software; you can redistribute it and/or
|
* This program is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU General Public License as
|
* modify it under the terms of the GNU General Public License as
|
* published by the Free Software Foundation; either version 2 of
|
* published by the Free Software Foundation; either version 2 of
|
* the License, or (at your option) any later version.
|
* the License, or (at your option) any later version.
|
*
|
*
|
* Neither Dag Brattli nor University of Tromsø admit liability nor
|
* Neither Dag Brattli nor University of Tromsø admit liability nor
|
* provide warranty for any of this software. This material is
|
* provide warranty for any of this software. This material is
|
* provided "AS-IS" and at no charge.
|
* provided "AS-IS" and at no charge.
|
*
|
*
|
********************************************************************/
|
********************************************************************/
|
|
|
#include <linux/skbuff.h>
|
#include <linux/skbuff.h>
|
#include <linux/if.h>
|
#include <linux/if.h>
|
#include <linux/if_ether.h>
|
#include <linux/if_ether.h>
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/irda.h>
|
#include <linux/irda.h>
|
|
|
#include <net/pkt_sched.h>
|
#include <net/pkt_sched.h>
|
#include <net/sock.h>
|
#include <net/sock.h>
|
|
|
#include <asm/byteorder.h>
|
#include <asm/byteorder.h>
|
|
|
#include <net/irda/irda.h>
|
#include <net/irda/irda.h>
|
#include <net/irda/irda_device.h>
|
#include <net/irda/irda_device.h>
|
#include <net/irda/irlap.h>
|
#include <net/irda/irlap.h>
|
#include <net/irda/wrapper.h>
|
#include <net/irda/wrapper.h>
|
#include <net/irda/timer.h>
|
#include <net/irda/timer.h>
|
#include <net/irda/irlap_frame.h>
|
#include <net/irda/irlap_frame.h>
|
#include <net/irda/qos.h>
|
#include <net/irda/qos.h>
|
|
|
/*
|
/*
|
* Function irlap_insert_info (self, skb)
|
* Function irlap_insert_info (self, skb)
|
*
|
*
|
* Insert minimum turnaround time and speed information into the skb. We
|
* Insert minimum turnaround time and speed information into the skb. We
|
* need to do this since it's per packet relevant information. Safe to
|
* need to do this since it's per packet relevant information. Safe to
|
* have this function inlined since it's only called from one place
|
* have this function inlined since it's only called from one place
|
*/
|
*/
|
static inline void irlap_insert_info(struct irlap_cb *self,
|
static inline void irlap_insert_info(struct irlap_cb *self,
|
struct sk_buff *skb)
|
struct sk_buff *skb)
|
{
|
{
|
struct irda_skb_cb *cb = (struct irda_skb_cb *) skb->cb;
|
struct irda_skb_cb *cb = (struct irda_skb_cb *) skb->cb;
|
|
|
/*
|
/*
|
* Insert MTT (min. turn time) and speed into skb, so that the
|
* Insert MTT (min. turn time) and speed into skb, so that the
|
* device driver knows which settings to use
|
* device driver knows which settings to use
|
*/
|
*/
|
cb->magic = LAP_MAGIC;
|
cb->magic = LAP_MAGIC;
|
cb->mtt = self->mtt_required;
|
cb->mtt = self->mtt_required;
|
cb->next_speed = self->speed;
|
cb->next_speed = self->speed;
|
|
|
/* Reset */
|
/* Reset */
|
self->mtt_required = 0;
|
self->mtt_required = 0;
|
|
|
/*
|
/*
|
* Delay equals negotiated BOFs count, plus the number of BOFs to
|
* Delay equals negotiated BOFs count, plus the number of BOFs to
|
* force the negotiated minimum turnaround time
|
* force the negotiated minimum turnaround time
|
*/
|
*/
|
cb->xbofs = self->bofs_count;
|
cb->xbofs = self->bofs_count;
|
cb->next_xbofs = self->next_bofs;
|
cb->next_xbofs = self->next_bofs;
|
cb->xbofs_delay = self->xbofs_delay;
|
cb->xbofs_delay = self->xbofs_delay;
|
|
|
/* Reset XBOF's delay (used only for getting min turn time) */
|
/* Reset XBOF's delay (used only for getting min turn time) */
|
self->xbofs_delay = 0;
|
self->xbofs_delay = 0;
|
/* Put the correct xbofs value for the next packet */
|
/* Put the correct xbofs value for the next packet */
|
self->bofs_count = self->next_bofs;
|
self->bofs_count = self->next_bofs;
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_queue_xmit (self, skb)
|
* Function irlap_queue_xmit (self, skb)
|
*
|
*
|
* A little wrapper for dev_queue_xmit, so we can insert some common
|
* A little wrapper for dev_queue_xmit, so we can insert some common
|
* code into it.
|
* code into it.
|
*/
|
*/
|
void irlap_queue_xmit(struct irlap_cb *self, struct sk_buff *skb)
|
void irlap_queue_xmit(struct irlap_cb *self, struct sk_buff *skb)
|
{
|
{
|
/* Some common init stuff */
|
/* Some common init stuff */
|
skb->dev = self->netdev;
|
skb->dev = self->netdev;
|
skb->h.raw = skb->nh.raw = skb->mac.raw = skb->data;
|
skb->h.raw = skb->nh.raw = skb->mac.raw = skb->data;
|
skb->protocol = htons(ETH_P_IRDA);
|
skb->protocol = htons(ETH_P_IRDA);
|
skb->priority = TC_PRIO_BESTEFFORT;
|
skb->priority = TC_PRIO_BESTEFFORT;
|
|
|
irlap_insert_info(self, skb);
|
irlap_insert_info(self, skb);
|
|
|
dev_queue_xmit(skb);
|
dev_queue_xmit(skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_snrm_cmd (void)
|
* Function irlap_send_snrm_cmd (void)
|
*
|
*
|
* Transmits a connect SNRM command frame
|
* Transmits a connect SNRM command frame
|
*/
|
*/
|
void irlap_send_snrm_frame(struct irlap_cb *self, struct qos_info *qos)
|
void irlap_send_snrm_frame(struct irlap_cb *self, struct qos_info *qos)
|
{
|
{
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
struct snrm_frame *frame;
|
struct snrm_frame *frame;
|
int ret;
|
int ret;
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
|
|
/* Allocate frame */
|
/* Allocate frame */
|
skb = dev_alloc_skb(64);
|
skb = dev_alloc_skb(64);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
frame = (struct snrm_frame *) skb_put(skb, 2);
|
frame = (struct snrm_frame *) skb_put(skb, 2);
|
|
|
/* Insert connection address field */
|
/* Insert connection address field */
|
if (qos)
|
if (qos)
|
frame->caddr = CMD_FRAME | CBROADCAST;
|
frame->caddr = CMD_FRAME | CBROADCAST;
|
else
|
else
|
frame->caddr = CMD_FRAME | self->caddr;
|
frame->caddr = CMD_FRAME | self->caddr;
|
|
|
/* Insert control field */
|
/* Insert control field */
|
frame->control = SNRM_CMD | PF_BIT;
|
frame->control = SNRM_CMD | PF_BIT;
|
|
|
/*
|
/*
|
* If we are establishing a connection then insert QoS paramerters
|
* If we are establishing a connection then insert QoS paramerters
|
*/
|
*/
|
if (qos) {
|
if (qos) {
|
skb_put(skb, 9); /* 21 left */
|
skb_put(skb, 9); /* 21 left */
|
frame->saddr = cpu_to_le32(self->saddr);
|
frame->saddr = cpu_to_le32(self->saddr);
|
frame->daddr = cpu_to_le32(self->daddr);
|
frame->daddr = cpu_to_le32(self->daddr);
|
|
|
frame->ncaddr = self->caddr;
|
frame->ncaddr = self->caddr;
|
|
|
ret = irlap_insert_qos_negotiation_params(self, skb);
|
ret = irlap_insert_qos_negotiation_params(self, skb);
|
if (ret < 0) {
|
if (ret < 0) {
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_snrm_cmd (skb, info)
|
* Function irlap_recv_snrm_cmd (skb, info)
|
*
|
*
|
* Received SNRM (Set Normal Response Mode) command frame
|
* Received SNRM (Set Normal Response Mode) command frame
|
*
|
*
|
*/
|
*/
|
static void irlap_recv_snrm_cmd(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_snrm_cmd(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info)
|
struct irlap_info *info)
|
{
|
{
|
struct snrm_frame *frame;
|
struct snrm_frame *frame;
|
|
|
frame = (struct snrm_frame *) skb->data;
|
frame = (struct snrm_frame *) skb->data;
|
|
|
if (skb->len >= sizeof(struct snrm_frame)) {
|
if (skb->len >= sizeof(struct snrm_frame)) {
|
/* Copy the new connection address ignoring the C/R bit */
|
/* Copy the new connection address ignoring the C/R bit */
|
info->caddr = frame->ncaddr & 0xFE;
|
info->caddr = frame->ncaddr & 0xFE;
|
|
|
/* Check if the new connection address is valid */
|
/* Check if the new connection address is valid */
|
if ((info->caddr == 0x00) || (info->caddr == 0xfe)) {
|
if ((info->caddr == 0x00) || (info->caddr == 0xfe)) {
|
IRDA_DEBUG(3, "%s(), invalid connection address!\n", __FUNCTION__);
|
IRDA_DEBUG(3, "%s(), invalid connection address!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
|
|
/* Copy peer device address */
|
/* Copy peer device address */
|
info->daddr = le32_to_cpu(frame->saddr);
|
info->daddr = le32_to_cpu(frame->saddr);
|
info->saddr = le32_to_cpu(frame->daddr);
|
info->saddr = le32_to_cpu(frame->daddr);
|
|
|
/* Only accept if addressed directly to us */
|
/* Only accept if addressed directly to us */
|
if (info->saddr != self->saddr) {
|
if (info->saddr != self->saddr) {
|
IRDA_DEBUG(2, "%s(), not addressed to us!\n", __FUNCTION__);
|
IRDA_DEBUG(2, "%s(), not addressed to us!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
irlap_do_event(self, RECV_SNRM_CMD, skb, info);
|
irlap_do_event(self, RECV_SNRM_CMD, skb, info);
|
} else {
|
} else {
|
/* Signal that this SNRM frame does not contain and I-field */
|
/* Signal that this SNRM frame does not contain and I-field */
|
irlap_do_event(self, RECV_SNRM_CMD, skb, NULL);
|
irlap_do_event(self, RECV_SNRM_CMD, skb, NULL);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_ua_response_frame (qos)
|
* Function irlap_send_ua_response_frame (qos)
|
*
|
*
|
* Send UA (Unnumbered Acknowledgement) frame
|
* Send UA (Unnumbered Acknowledgement) frame
|
*
|
*
|
*/
|
*/
|
void irlap_send_ua_response_frame(struct irlap_cb *self, struct qos_info *qos)
|
void irlap_send_ua_response_frame(struct irlap_cb *self, struct qos_info *qos)
|
{
|
{
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
struct ua_frame *frame;
|
struct ua_frame *frame;
|
int ret;
|
int ret;
|
|
|
IRDA_DEBUG(2, "%s() <%ld>\n", __FUNCTION__, jiffies);
|
IRDA_DEBUG(2, "%s() <%ld>\n", __FUNCTION__, jiffies);
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
|
|
skb = NULL;
|
skb = NULL;
|
|
|
/* Allocate frame */
|
/* Allocate frame */
|
skb = dev_alloc_skb(64);
|
skb = dev_alloc_skb(64);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
frame = (struct ua_frame *) skb_put(skb, 10);
|
frame = (struct ua_frame *) skb_put(skb, 10);
|
|
|
/* Build UA response */
|
/* Build UA response */
|
frame->caddr = self->caddr;
|
frame->caddr = self->caddr;
|
frame->control = UA_RSP | PF_BIT;
|
frame->control = UA_RSP | PF_BIT;
|
|
|
frame->saddr = cpu_to_le32(self->saddr);
|
frame->saddr = cpu_to_le32(self->saddr);
|
frame->daddr = cpu_to_le32(self->daddr);
|
frame->daddr = cpu_to_le32(self->daddr);
|
|
|
/* Should we send QoS negotiation parameters? */
|
/* Should we send QoS negotiation parameters? */
|
if (qos) {
|
if (qos) {
|
ret = irlap_insert_qos_negotiation_params(self, skb);
|
ret = irlap_insert_qos_negotiation_params(self, skb);
|
if (ret < 0) {
|
if (ret < 0) {
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Function irlap_send_dm_frame (void)
|
* Function irlap_send_dm_frame (void)
|
*
|
*
|
* Send disconnected mode (DM) frame
|
* Send disconnected mode (DM) frame
|
*
|
*
|
*/
|
*/
|
void irlap_send_dm_frame( struct irlap_cb *self)
|
void irlap_send_dm_frame( struct irlap_cb *self)
|
{
|
{
|
struct sk_buff *skb = NULL;
|
struct sk_buff *skb = NULL;
|
__u8 *frame;
|
__u8 *frame;
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
|
|
skb = dev_alloc_skb(32);
|
skb = dev_alloc_skb(32);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
frame = skb_put( skb, 2);
|
frame = skb_put( skb, 2);
|
|
|
if (self->state == LAP_NDM)
|
if (self->state == LAP_NDM)
|
frame[0] = CBROADCAST;
|
frame[0] = CBROADCAST;
|
else
|
else
|
frame[0] = self->caddr;
|
frame[0] = self->caddr;
|
|
|
frame[1] = DM_RSP | PF_BIT;
|
frame[1] = DM_RSP | PF_BIT;
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_disc_frame (void)
|
* Function irlap_send_disc_frame (void)
|
*
|
*
|
* Send disconnect (DISC) frame
|
* Send disconnect (DISC) frame
|
*
|
*
|
*/
|
*/
|
void irlap_send_disc_frame(struct irlap_cb *self)
|
void irlap_send_disc_frame(struct irlap_cb *self)
|
{
|
{
|
struct sk_buff *skb = NULL;
|
struct sk_buff *skb = NULL;
|
__u8 *frame;
|
__u8 *frame;
|
|
|
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
|
|
skb = dev_alloc_skb(16);
|
skb = dev_alloc_skb(16);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
frame = skb_put(skb, 2);
|
frame = skb_put(skb, 2);
|
|
|
frame[0] = self->caddr | CMD_FRAME;
|
frame[0] = self->caddr | CMD_FRAME;
|
frame[1] = DISC_CMD | PF_BIT;
|
frame[1] = DISC_CMD | PF_BIT;
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_discovery_xid_frame (S, s, command)
|
* Function irlap_send_discovery_xid_frame (S, s, command)
|
*
|
*
|
* Build and transmit a XID (eXchange station IDentifier) discovery
|
* Build and transmit a XID (eXchange station IDentifier) discovery
|
* frame.
|
* frame.
|
*/
|
*/
|
void irlap_send_discovery_xid_frame(struct irlap_cb *self, int S, __u8 s,
|
void irlap_send_discovery_xid_frame(struct irlap_cb *self, int S, __u8 s,
|
__u8 command, discovery_t *discovery)
|
__u8 command, discovery_t *discovery)
|
{
|
{
|
struct sk_buff *skb = NULL;
|
struct sk_buff *skb = NULL;
|
struct xid_frame *frame;
|
struct xid_frame *frame;
|
__u32 bcast = BROADCAST;
|
__u32 bcast = BROADCAST;
|
__u8 *info;
|
__u8 *info;
|
|
|
IRDA_DEBUG(4, "%s(), s=%d, S=%d, command=%d\n", __FUNCTION__, s, S,
|
IRDA_DEBUG(4, "%s(), s=%d, S=%d, command=%d\n", __FUNCTION__, s, S,
|
command);
|
command);
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(discovery != NULL, return;);
|
ASSERT(discovery != NULL, return;);
|
|
|
skb = dev_alloc_skb(64);
|
skb = dev_alloc_skb(64);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
skb_put(skb, 14);
|
skb_put(skb, 14);
|
frame = (struct xid_frame *) skb->data;
|
frame = (struct xid_frame *) skb->data;
|
|
|
if (command) {
|
if (command) {
|
frame->caddr = CBROADCAST | CMD_FRAME;
|
frame->caddr = CBROADCAST | CMD_FRAME;
|
frame->control = XID_CMD | PF_BIT;
|
frame->control = XID_CMD | PF_BIT;
|
} else {
|
} else {
|
frame->caddr = CBROADCAST;
|
frame->caddr = CBROADCAST;
|
frame->control = XID_RSP | PF_BIT;
|
frame->control = XID_RSP | PF_BIT;
|
}
|
}
|
frame->ident = XID_FORMAT;
|
frame->ident = XID_FORMAT;
|
|
|
frame->saddr = cpu_to_le32(self->saddr);
|
frame->saddr = cpu_to_le32(self->saddr);
|
|
|
if (command)
|
if (command)
|
frame->daddr = cpu_to_le32(bcast);
|
frame->daddr = cpu_to_le32(bcast);
|
else
|
else
|
frame->daddr = cpu_to_le32(discovery->daddr);
|
frame->daddr = cpu_to_le32(discovery->daddr);
|
|
|
switch (S) {
|
switch (S) {
|
case 1:
|
case 1:
|
frame->flags = 0x00;
|
frame->flags = 0x00;
|
break;
|
break;
|
case 6:
|
case 6:
|
frame->flags = 0x01;
|
frame->flags = 0x01;
|
break;
|
break;
|
case 8:
|
case 8:
|
frame->flags = 0x02;
|
frame->flags = 0x02;
|
break;
|
break;
|
case 16:
|
case 16:
|
frame->flags = 0x03;
|
frame->flags = 0x03;
|
break;
|
break;
|
default:
|
default:
|
frame->flags = 0x02;
|
frame->flags = 0x02;
|
break;
|
break;
|
}
|
}
|
|
|
frame->slotnr = s;
|
frame->slotnr = s;
|
frame->version = 0x00;
|
frame->version = 0x00;
|
|
|
/*
|
/*
|
* Provide info for final slot only in commands, and for all
|
* Provide info for final slot only in commands, and for all
|
* responses. Send the second byte of the hint only if the
|
* responses. Send the second byte of the hint only if the
|
* EXTENSION bit is set in the first byte.
|
* EXTENSION bit is set in the first byte.
|
*/
|
*/
|
if (!command || (frame->slotnr == 0xff)) {
|
if (!command || (frame->slotnr == 0xff)) {
|
int len;
|
int len;
|
|
|
if (discovery->hints.byte[0] & HINT_EXTENSION) {
|
if (discovery->hints.byte[0] & HINT_EXTENSION) {
|
info = skb_put(skb, 2);
|
info = skb_put(skb, 2);
|
info[0] = discovery->hints.byte[0];
|
info[0] = discovery->hints.byte[0];
|
info[1] = discovery->hints.byte[1];
|
info[1] = discovery->hints.byte[1];
|
} else {
|
} else {
|
info = skb_put(skb, 1);
|
info = skb_put(skb, 1);
|
info[0] = discovery->hints.byte[0];
|
info[0] = discovery->hints.byte[0];
|
}
|
}
|
info = skb_put(skb, 1);
|
info = skb_put(skb, 1);
|
info[0] = discovery->charset;
|
info[0] = discovery->charset;
|
|
|
len = IRDA_MIN(discovery->name_len, skb_tailroom(skb));
|
len = IRDA_MIN(discovery->name_len, skb_tailroom(skb));
|
info = skb_put(skb, len);
|
info = skb_put(skb, len);
|
memcpy(info, discovery->nickname, len);
|
memcpy(info, discovery->nickname, len);
|
}
|
}
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_discovery_xid_rsp (skb, info)
|
* Function irlap_recv_discovery_xid_rsp (skb, info)
|
*
|
*
|
* Received a XID discovery response
|
* Received a XID discovery response
|
*
|
*
|
*/
|
*/
|
static void irlap_recv_discovery_xid_rsp(struct irlap_cb *self,
|
static void irlap_recv_discovery_xid_rsp(struct irlap_cb *self,
|
struct sk_buff *skb,
|
struct sk_buff *skb,
|
struct irlap_info *info)
|
struct irlap_info *info)
|
{
|
{
|
struct xid_frame *xid;
|
struct xid_frame *xid;
|
discovery_t *discovery = NULL;
|
discovery_t *discovery = NULL;
|
__u8 *discovery_info;
|
__u8 *discovery_info;
|
char *text;
|
char *text;
|
|
|
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
|
|
xid = (struct xid_frame *) skb->data;
|
xid = (struct xid_frame *) skb->data;
|
|
|
info->daddr = le32_to_cpu(xid->saddr);
|
info->daddr = le32_to_cpu(xid->saddr);
|
info->saddr = le32_to_cpu(xid->daddr);
|
info->saddr = le32_to_cpu(xid->daddr);
|
|
|
/* Make sure frame is addressed to us */
|
/* Make sure frame is addressed to us */
|
if ((info->saddr != self->saddr) && (info->saddr != BROADCAST)) {
|
if ((info->saddr != self->saddr) && (info->saddr != BROADCAST)) {
|
IRDA_DEBUG(0, "%s(), frame is not addressed to us!\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s(), frame is not addressed to us!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
|
|
if ((discovery = kmalloc(sizeof(discovery_t), GFP_ATOMIC)) == NULL) {
|
if ((discovery = kmalloc(sizeof(discovery_t), GFP_ATOMIC)) == NULL) {
|
WARNING("%s(), kmalloc failed!\n", __FUNCTION__);
|
WARNING("%s(), kmalloc failed!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
memset(discovery, 0, sizeof(discovery_t));
|
memset(discovery, 0, sizeof(discovery_t));
|
|
|
discovery->daddr = info->daddr;
|
discovery->daddr = info->daddr;
|
discovery->saddr = self->saddr;
|
discovery->saddr = self->saddr;
|
discovery->timestamp = jiffies;
|
discovery->timestamp = jiffies;
|
|
|
IRDA_DEBUG(4, "%s(), daddr=%08x\n", __FUNCTION__, discovery->daddr);
|
IRDA_DEBUG(4, "%s(), daddr=%08x\n", __FUNCTION__, discovery->daddr);
|
|
|
discovery_info = skb_pull(skb, sizeof(struct xid_frame));
|
discovery_info = skb_pull(skb, sizeof(struct xid_frame));
|
|
|
/* Get info returned from peer */
|
/* Get info returned from peer */
|
discovery->hints.byte[0] = discovery_info[0];
|
discovery->hints.byte[0] = discovery_info[0];
|
if (discovery_info[0] & HINT_EXTENSION) {
|
if (discovery_info[0] & HINT_EXTENSION) {
|
IRDA_DEBUG(4, "EXTENSION\n");
|
IRDA_DEBUG(4, "EXTENSION\n");
|
discovery->hints.byte[1] = discovery_info[1];
|
discovery->hints.byte[1] = discovery_info[1];
|
discovery->charset = discovery_info[2];
|
discovery->charset = discovery_info[2];
|
text = (char *) &discovery_info[3];
|
text = (char *) &discovery_info[3];
|
} else {
|
} else {
|
discovery->hints.byte[1] = 0;
|
discovery->hints.byte[1] = 0;
|
discovery->charset = discovery_info[1];
|
discovery->charset = discovery_info[1];
|
text = (char *) &discovery_info[2];
|
text = (char *) &discovery_info[2];
|
}
|
}
|
/*
|
/*
|
* Terminate info string, should be safe since this is where the
|
* Terminate info string, should be safe since this is where the
|
* FCS bytes resides.
|
* FCS bytes resides.
|
*/
|
*/
|
skb->data[skb->len] = '\0';
|
skb->data[skb->len] = '\0';
|
strncpy(discovery->nickname, text, NICKNAME_MAX_LEN);
|
strncpy(discovery->nickname, text, NICKNAME_MAX_LEN);
|
discovery->name_len = strlen(discovery->nickname);
|
discovery->name_len = strlen(discovery->nickname);
|
|
|
info->discovery = discovery;
|
info->discovery = discovery;
|
|
|
irlap_do_event(self, RECV_DISCOVERY_XID_RSP, skb, info);
|
irlap_do_event(self, RECV_DISCOVERY_XID_RSP, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_discovery_xid_cmd (skb, info)
|
* Function irlap_recv_discovery_xid_cmd (skb, info)
|
*
|
*
|
* Received a XID discovery command
|
* Received a XID discovery command
|
*
|
*
|
*/
|
*/
|
static void irlap_recv_discovery_xid_cmd(struct irlap_cb *self,
|
static void irlap_recv_discovery_xid_cmd(struct irlap_cb *self,
|
struct sk_buff *skb,
|
struct sk_buff *skb,
|
struct irlap_info *info)
|
struct irlap_info *info)
|
{
|
{
|
struct xid_frame *xid;
|
struct xid_frame *xid;
|
discovery_t *discovery = NULL;
|
discovery_t *discovery = NULL;
|
__u8 *discovery_info;
|
__u8 *discovery_info;
|
char *text;
|
char *text;
|
|
|
xid = (struct xid_frame *) skb->data;
|
xid = (struct xid_frame *) skb->data;
|
|
|
info->daddr = le32_to_cpu(xid->saddr);
|
info->daddr = le32_to_cpu(xid->saddr);
|
info->saddr = le32_to_cpu(xid->daddr);
|
info->saddr = le32_to_cpu(xid->daddr);
|
|
|
/* Make sure frame is addressed to us */
|
/* Make sure frame is addressed to us */
|
if ((info->saddr != self->saddr) && (info->saddr != BROADCAST)) {
|
if ((info->saddr != self->saddr) && (info->saddr != BROADCAST)) {
|
IRDA_DEBUG(0, "%s(), frame is not addressed to us!\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s(), frame is not addressed to us!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
|
|
switch (xid->flags & 0x03) {
|
switch (xid->flags & 0x03) {
|
case 0x00:
|
case 0x00:
|
info->S = 1;
|
info->S = 1;
|
break;
|
break;
|
case 0x01:
|
case 0x01:
|
info->S = 6;
|
info->S = 6;
|
break;
|
break;
|
case 0x02:
|
case 0x02:
|
info->S = 8;
|
info->S = 8;
|
break;
|
break;
|
case 0x03:
|
case 0x03:
|
info->S = 16;
|
info->S = 16;
|
break;
|
break;
|
default:
|
default:
|
/* Error!! */
|
/* Error!! */
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return;
|
return;
|
}
|
}
|
info->s = xid->slotnr;
|
info->s = xid->slotnr;
|
|
|
discovery_info = skb_pull(skb, sizeof(struct xid_frame));
|
discovery_info = skb_pull(skb, sizeof(struct xid_frame));
|
|
|
/*
|
/*
|
* Check if last frame
|
* Check if last frame
|
*/
|
*/
|
if (info->s == 0xff) {
|
if (info->s == 0xff) {
|
/* Check if things are sane at this point... */
|
/* Check if things are sane at this point... */
|
if((discovery_info == NULL) || (skb->len < 3)) {
|
if((discovery_info == NULL) || (skb->len < 3)) {
|
ERROR("%s(), discovery frame to short!\n", __FUNCTION__);
|
ERROR("%s(), discovery frame to short!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* We now have some discovery info to deliver!
|
* We now have some discovery info to deliver!
|
*/
|
*/
|
discovery = kmalloc(sizeof(discovery_t), GFP_ATOMIC);
|
discovery = kmalloc(sizeof(discovery_t), GFP_ATOMIC);
|
if (!discovery) {
|
if (!discovery) {
|
WARNING("%s(), unable to malloc!\n", __FUNCTION__);
|
WARNING("%s(), unable to malloc!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
|
|
discovery->daddr = info->daddr;
|
discovery->daddr = info->daddr;
|
discovery->saddr = self->saddr;
|
discovery->saddr = self->saddr;
|
discovery->timestamp = jiffies;
|
discovery->timestamp = jiffies;
|
|
|
discovery->hints.byte[0] = discovery_info[0];
|
discovery->hints.byte[0] = discovery_info[0];
|
if (discovery_info[0] & HINT_EXTENSION) {
|
if (discovery_info[0] & HINT_EXTENSION) {
|
discovery->hints.byte[1] = discovery_info[1];
|
discovery->hints.byte[1] = discovery_info[1];
|
discovery->charset = discovery_info[2];
|
discovery->charset = discovery_info[2];
|
text = (char *) &discovery_info[3];
|
text = (char *) &discovery_info[3];
|
} else {
|
} else {
|
discovery->hints.byte[1] = 0;
|
discovery->hints.byte[1] = 0;
|
discovery->charset = discovery_info[1];
|
discovery->charset = discovery_info[1];
|
text = (char *) &discovery_info[2];
|
text = (char *) &discovery_info[2];
|
}
|
}
|
/*
|
/*
|
* Terminate string, should be safe since this is where the
|
* Terminate string, should be safe since this is where the
|
* FCS bytes resides.
|
* FCS bytes resides.
|
*/
|
*/
|
skb->data[skb->len] = '\0';
|
skb->data[skb->len] = '\0';
|
strncpy(discovery->nickname, text, NICKNAME_MAX_LEN);
|
strncpy(discovery->nickname, text, NICKNAME_MAX_LEN);
|
discovery->name_len = strlen(discovery->nickname);
|
discovery->name_len = strlen(discovery->nickname);
|
|
|
info->discovery = discovery;
|
info->discovery = discovery;
|
} else
|
} else
|
info->discovery = NULL;
|
info->discovery = NULL;
|
|
|
irlap_do_event(self, RECV_DISCOVERY_XID_CMD, skb, info);
|
irlap_do_event(self, RECV_DISCOVERY_XID_CMD, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_rr_frame (self, command)
|
* Function irlap_send_rr_frame (self, command)
|
*
|
*
|
* Build and transmit RR (Receive Ready) frame. Notice that it is currently
|
* Build and transmit RR (Receive Ready) frame. Notice that it is currently
|
* only possible to send RR frames with the poll bit set.
|
* only possible to send RR frames with the poll bit set.
|
*/
|
*/
|
void irlap_send_rr_frame(struct irlap_cb *self, int command)
|
void irlap_send_rr_frame(struct irlap_cb *self, int command)
|
{
|
{
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
__u8 *frame;
|
__u8 *frame;
|
|
|
skb = dev_alloc_skb(16);
|
skb = dev_alloc_skb(16);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
frame = skb_put(skb, 2);
|
frame = skb_put(skb, 2);
|
|
|
frame[0] = self->caddr;
|
frame[0] = self->caddr;
|
frame[0] |= (command) ? CMD_FRAME : 0;
|
frame[0] |= (command) ? CMD_FRAME : 0;
|
|
|
frame[1] = RR | PF_BIT | (self->vr << 5);
|
frame[1] = RR | PF_BIT | (self->vr << 5);
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_rd_frame (self)
|
* Function irlap_send_rd_frame (self)
|
*
|
*
|
* Request disconnect. Used by a secondary station to request the
|
* Request disconnect. Used by a secondary station to request the
|
* disconnection of the link.
|
* disconnection of the link.
|
*/
|
*/
|
void irlap_send_rd_frame(struct irlap_cb *self)
|
void irlap_send_rd_frame(struct irlap_cb *self)
|
{
|
{
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
__u8 *frame;
|
__u8 *frame;
|
|
|
skb = dev_alloc_skb(16);
|
skb = dev_alloc_skb(16);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
frame = skb_put(skb, 2);
|
frame = skb_put(skb, 2);
|
|
|
frame[0] = self->caddr;
|
frame[0] = self->caddr;
|
frame[1] = RD_RSP | PF_BIT;
|
frame[1] = RD_RSP | PF_BIT;
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_rr_frame (skb, info)
|
* Function irlap_recv_rr_frame (skb, info)
|
*
|
*
|
* Received RR (Receive Ready) frame from peer station, no harm in
|
* Received RR (Receive Ready) frame from peer station, no harm in
|
* making it inline since its called only from one single place
|
* making it inline since its called only from one single place
|
* (irlap_driver_rcv).
|
* (irlap_driver_rcv).
|
*/
|
*/
|
static inline void irlap_recv_rr_frame(struct irlap_cb *self,
|
static inline void irlap_recv_rr_frame(struct irlap_cb *self,
|
struct sk_buff *skb,
|
struct sk_buff *skb,
|
struct irlap_info *info, int command)
|
struct irlap_info *info, int command)
|
{
|
{
|
info->nr = skb->data[1] >> 5;
|
info->nr = skb->data[1] >> 5;
|
|
|
/* Check if this is a command or a response frame */
|
/* Check if this is a command or a response frame */
|
if (command)
|
if (command)
|
irlap_do_event(self, RECV_RR_CMD, skb, info);
|
irlap_do_event(self, RECV_RR_CMD, skb, info);
|
else
|
else
|
irlap_do_event(self, RECV_RR_RSP, skb, info);
|
irlap_do_event(self, RECV_RR_RSP, skb, info);
|
}
|
}
|
|
|
void irlap_send_frmr_frame( struct irlap_cb *self, int command)
|
void irlap_send_frmr_frame( struct irlap_cb *self, int command)
|
{
|
{
|
struct sk_buff *skb = NULL;
|
struct sk_buff *skb = NULL;
|
__u8 *frame;
|
__u8 *frame;
|
|
|
ASSERT( self != NULL, return;);
|
ASSERT( self != NULL, return;);
|
ASSERT( self->magic == LAP_MAGIC, return;);
|
ASSERT( self->magic == LAP_MAGIC, return;);
|
|
|
skb = dev_alloc_skb( 32);
|
skb = dev_alloc_skb( 32);
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
frame = skb_put( skb, 2);
|
frame = skb_put( skb, 2);
|
|
|
frame[0] = self->caddr;
|
frame[0] = self->caddr;
|
frame[0] |= (command) ? CMD_FRAME : 0;
|
frame[0] |= (command) ? CMD_FRAME : 0;
|
|
|
frame[1] = (self->vs << 1);
|
frame[1] = (self->vs << 1);
|
frame[1] |= PF_BIT;
|
frame[1] |= PF_BIT;
|
frame[1] |= (self->vr << 5);
|
frame[1] |= (self->vr << 5);
|
|
|
frame[2] = 0;
|
frame[2] = 0;
|
|
|
IRDA_DEBUG(4, "%s(), vr=%d, %ld\n", __FUNCTION__, self->vr, jiffies);
|
IRDA_DEBUG(4, "%s(), vr=%d, %ld\n", __FUNCTION__, self->vr, jiffies);
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_rnr_frame (self, skb, info)
|
* Function irlap_recv_rnr_frame (self, skb, info)
|
*
|
*
|
* Received RNR (Receive Not Ready) frame from peer station
|
* Received RNR (Receive Not Ready) frame from peer station
|
*
|
*
|
*/
|
*/
|
static void irlap_recv_rnr_frame(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_rnr_frame(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info, int command)
|
struct irlap_info *info, int command)
|
{
|
{
|
info->nr = skb->data[1] >> 5;
|
info->nr = skb->data[1] >> 5;
|
|
|
IRDA_DEBUG(4, "%s(), nr=%d, %ld\n", __FUNCTION__, info->nr, jiffies);
|
IRDA_DEBUG(4, "%s(), nr=%d, %ld\n", __FUNCTION__, info->nr, jiffies);
|
|
|
if (command)
|
if (command)
|
irlap_do_event(self, RECV_RNR_CMD, skb, info);
|
irlap_do_event(self, RECV_RNR_CMD, skb, info);
|
else
|
else
|
irlap_do_event(self, RECV_RNR_RSP, skb, info);
|
irlap_do_event(self, RECV_RNR_RSP, skb, info);
|
}
|
}
|
|
|
static void irlap_recv_rej_frame(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_rej_frame(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info, int command)
|
struct irlap_info *info, int command)
|
{
|
{
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
|
|
|
info->nr = skb->data[1] >> 5;
|
info->nr = skb->data[1] >> 5;
|
|
|
/* Check if this is a command or a response frame */
|
/* Check if this is a command or a response frame */
|
if (command)
|
if (command)
|
irlap_do_event(self, RECV_REJ_CMD, skb, info);
|
irlap_do_event(self, RECV_REJ_CMD, skb, info);
|
else
|
else
|
irlap_do_event(self, RECV_REJ_RSP, skb, info);
|
irlap_do_event(self, RECV_REJ_RSP, skb, info);
|
}
|
}
|
|
|
static void irlap_recv_srej_frame(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_srej_frame(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info, int command)
|
struct irlap_info *info, int command)
|
{
|
{
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
|
|
|
info->nr = skb->data[1] >> 5;
|
info->nr = skb->data[1] >> 5;
|
|
|
/* Check if this is a command or a response frame */
|
/* Check if this is a command or a response frame */
|
if (command)
|
if (command)
|
irlap_do_event(self, RECV_SREJ_CMD, skb, info);
|
irlap_do_event(self, RECV_SREJ_CMD, skb, info);
|
else
|
else
|
irlap_do_event(self, RECV_SREJ_RSP, skb, info);
|
irlap_do_event(self, RECV_SREJ_RSP, skb, info);
|
}
|
}
|
|
|
static void irlap_recv_disc_frame(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_disc_frame(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info, int command)
|
struct irlap_info *info, int command)
|
{
|
{
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
|
|
|
/* Check if this is a command or a response frame */
|
/* Check if this is a command or a response frame */
|
if (command)
|
if (command)
|
irlap_do_event(self, RECV_DISC_CMD, skb, info);
|
irlap_do_event(self, RECV_DISC_CMD, skb, info);
|
else
|
else
|
irlap_do_event(self, RECV_RD_RSP, skb, info);
|
irlap_do_event(self, RECV_RD_RSP, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_ua_frame (skb, frame)
|
* Function irlap_recv_ua_frame (skb, frame)
|
*
|
*
|
* Received UA (Unnumbered Acknowledgement) frame
|
* Received UA (Unnumbered Acknowledgement) frame
|
*
|
*
|
*/
|
*/
|
static inline void irlap_recv_ua_frame(struct irlap_cb *self,
|
static inline void irlap_recv_ua_frame(struct irlap_cb *self,
|
struct sk_buff *skb,
|
struct sk_buff *skb,
|
struct irlap_info *info)
|
struct irlap_info *info)
|
{
|
{
|
irlap_do_event(self, RECV_UA_RSP, skb, info);
|
irlap_do_event(self, RECV_UA_RSP, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_data_primary(self, skb)
|
* Function irlap_send_data_primary(self, skb)
|
*
|
*
|
* Send I-frames as the primary station but without the poll bit set
|
* Send I-frames as the primary station but without the poll bit set
|
*
|
*
|
*/
|
*/
|
void irlap_send_data_primary(struct irlap_cb *self, struct sk_buff *skb)
|
void irlap_send_data_primary(struct irlap_cb *self, struct sk_buff *skb)
|
{
|
{
|
struct sk_buff *tx_skb;
|
struct sk_buff *tx_skb;
|
|
|
if (skb->data[1] == I_FRAME) {
|
if (skb->data[1] == I_FRAME) {
|
|
|
/*
|
/*
|
* Insert frame sequence number (Vs) in control field before
|
* Insert frame sequence number (Vs) in control field before
|
* inserting into transmit window queue.
|
* inserting into transmit window queue.
|
*/
|
*/
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
|
|
/* Copy buffer */
|
/* Copy buffer */
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
if (tx_skb == NULL) {
|
if (tx_skb == NULL) {
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* Insert frame in store, in case of retransmissions
|
* Insert frame in store, in case of retransmissions
|
*/
|
*/
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
|
|
self->vs = (self->vs + 1) % 8;
|
self->vs = (self->vs + 1) % 8;
|
self->ack_required = FALSE;
|
self->ack_required = FALSE;
|
self->window -= 1;
|
self->window -= 1;
|
|
|
irlap_send_i_frame( self, tx_skb, CMD_FRAME);
|
irlap_send_i_frame( self, tx_skb, CMD_FRAME);
|
} else {
|
} else {
|
IRDA_DEBUG(4, "%s(), sending unreliable frame\n", __FUNCTION__);
|
IRDA_DEBUG(4, "%s(), sending unreliable frame\n", __FUNCTION__);
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
|
self->window -= 1;
|
self->window -= 1;
|
}
|
}
|
}
|
}
|
/*
|
/*
|
* Function irlap_send_data_primary_poll (self, skb)
|
* Function irlap_send_data_primary_poll (self, skb)
|
*
|
*
|
* Send I(nformation) frame as primary with poll bit set
|
* Send I(nformation) frame as primary with poll bit set
|
*/
|
*/
|
void irlap_send_data_primary_poll(struct irlap_cb *self, struct sk_buff *skb)
|
void irlap_send_data_primary_poll(struct irlap_cb *self, struct sk_buff *skb)
|
{
|
{
|
struct sk_buff *tx_skb;
|
struct sk_buff *tx_skb;
|
|
|
/* Stop P timer */
|
/* Stop P timer */
|
del_timer(&self->poll_timer);
|
del_timer(&self->poll_timer);
|
|
|
/* Is this reliable or unreliable data? */
|
/* Is this reliable or unreliable data? */
|
if (skb->data[1] == I_FRAME) {
|
if (skb->data[1] == I_FRAME) {
|
|
|
/*
|
/*
|
* Insert frame sequence number (Vs) in control field before
|
* Insert frame sequence number (Vs) in control field before
|
* inserting into transmit window queue.
|
* inserting into transmit window queue.
|
*/
|
*/
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
|
|
/* Copy buffer */
|
/* Copy buffer */
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
if (tx_skb == NULL) {
|
if (tx_skb == NULL) {
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* Insert frame in store, in case of retransmissions
|
* Insert frame in store, in case of retransmissions
|
*/
|
*/
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
|
|
/*
|
/*
|
* Set poll bit if necessary. We do this to the copied
|
* Set poll bit if necessary. We do this to the copied
|
* skb, since retransmitted need to set or clear the poll
|
* skb, since retransmitted need to set or clear the poll
|
* bit depending on when they are sent.
|
* bit depending on when they are sent.
|
*/
|
*/
|
tx_skb->data[1] |= PF_BIT;
|
tx_skb->data[1] |= PF_BIT;
|
|
|
self->vs = (self->vs + 1) % 8;
|
self->vs = (self->vs + 1) % 8;
|
self->ack_required = FALSE;
|
self->ack_required = FALSE;
|
|
|
irlap_send_i_frame(self, tx_skb, CMD_FRAME);
|
irlap_send_i_frame(self, tx_skb, CMD_FRAME);
|
} else {
|
} else {
|
IRDA_DEBUG(4, "%s(), sending unreliable frame\n", __FUNCTION__);
|
IRDA_DEBUG(4, "%s(), sending unreliable frame\n", __FUNCTION__);
|
|
|
if (self->ack_required) {
|
if (self->ack_required) {
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
|
irlap_send_rr_frame(self, CMD_FRAME);
|
irlap_send_rr_frame(self, CMD_FRAME);
|
self->ack_required = FALSE;
|
self->ack_required = FALSE;
|
} else {
|
} else {
|
skb->data[1] |= PF_BIT;
|
skb->data[1] |= PF_BIT;
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
|
}
|
}
|
}
|
}
|
|
|
self->window = self->window_size;
|
self->window = self->window_size;
|
#ifdef CONFIG_IRDA_DYNAMIC_WINDOW
|
#ifdef CONFIG_IRDA_DYNAMIC_WINDOW
|
/* We are allowed to transmit a maximum number of bytes again. */
|
/* We are allowed to transmit a maximum number of bytes again. */
|
self->bytes_left = self->line_capacity;
|
self->bytes_left = self->line_capacity;
|
#endif /* CONFIG_IRDA_DYNAMIC_WINDOW */
|
#endif /* CONFIG_IRDA_DYNAMIC_WINDOW */
|
|
|
irlap_start_final_timer(self, self->final_timeout);
|
irlap_start_final_timer(self, self->final_timeout);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_data_secondary_final (self, skb)
|
* Function irlap_send_data_secondary_final (self, skb)
|
*
|
*
|
* Send I(nformation) frame as secondary with final bit set
|
* Send I(nformation) frame as secondary with final bit set
|
*
|
*
|
*/
|
*/
|
void irlap_send_data_secondary_final(struct irlap_cb *self,
|
void irlap_send_data_secondary_final(struct irlap_cb *self,
|
struct sk_buff *skb)
|
struct sk_buff *skb)
|
{
|
{
|
struct sk_buff *tx_skb = NULL;
|
struct sk_buff *tx_skb = NULL;
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(skb != NULL, return;);
|
ASSERT(skb != NULL, return;);
|
|
|
/* Is this reliable or unreliable data? */
|
/* Is this reliable or unreliable data? */
|
if (skb->data[1] == I_FRAME) {
|
if (skb->data[1] == I_FRAME) {
|
|
|
/*
|
/*
|
* Insert frame sequence number (Vs) in control field before
|
* Insert frame sequence number (Vs) in control field before
|
* inserting into transmit window queue.
|
* inserting into transmit window queue.
|
*/
|
*/
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
|
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
if (tx_skb == NULL) {
|
if (tx_skb == NULL) {
|
return;
|
return;
|
}
|
}
|
|
|
/* Insert frame in store */
|
/* Insert frame in store */
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
|
|
tx_skb->data[1] |= PF_BIT;
|
tx_skb->data[1] |= PF_BIT;
|
|
|
self->vs = (self->vs + 1) % 8;
|
self->vs = (self->vs + 1) % 8;
|
self->ack_required = FALSE;
|
self->ack_required = FALSE;
|
|
|
irlap_send_i_frame(self, tx_skb, RSP_FRAME);
|
irlap_send_i_frame(self, tx_skb, RSP_FRAME);
|
} else {
|
} else {
|
if (self->ack_required) {
|
if (self->ack_required) {
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, RSP_FRAME);
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, RSP_FRAME);
|
irlap_send_rr_frame(self, RSP_FRAME);
|
irlap_send_rr_frame(self, RSP_FRAME);
|
self->ack_required = FALSE;
|
self->ack_required = FALSE;
|
} else {
|
} else {
|
skb->data[1] |= PF_BIT;
|
skb->data[1] |= PF_BIT;
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, RSP_FRAME);
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, RSP_FRAME);
|
}
|
}
|
}
|
}
|
|
|
self->window = self->window_size;
|
self->window = self->window_size;
|
#ifdef CONFIG_IRDA_DYNAMIC_WINDOW
|
#ifdef CONFIG_IRDA_DYNAMIC_WINDOW
|
/* We are allowed to transmit a maximum number of bytes again. */
|
/* We are allowed to transmit a maximum number of bytes again. */
|
self->bytes_left = self->line_capacity;
|
self->bytes_left = self->line_capacity;
|
#endif /* CONFIG_IRDA_DYNAMIC_WINDOW */
|
#endif /* CONFIG_IRDA_DYNAMIC_WINDOW */
|
|
|
irlap_start_wd_timer(self, self->wd_timeout);
|
irlap_start_wd_timer(self, self->wd_timeout);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_data_secondary (self, skb)
|
* Function irlap_send_data_secondary (self, skb)
|
*
|
*
|
* Send I(nformation) frame as secondary without final bit set
|
* Send I(nformation) frame as secondary without final bit set
|
*
|
*
|
*/
|
*/
|
void irlap_send_data_secondary(struct irlap_cb *self, struct sk_buff *skb)
|
void irlap_send_data_secondary(struct irlap_cb *self, struct sk_buff *skb)
|
{
|
{
|
struct sk_buff *tx_skb = NULL;
|
struct sk_buff *tx_skb = NULL;
|
|
|
/* Is this reliable or unreliable data? */
|
/* Is this reliable or unreliable data? */
|
if (skb->data[1] == I_FRAME) {
|
if (skb->data[1] == I_FRAME) {
|
|
|
/*
|
/*
|
* Insert frame sequence number (Vs) in control field before
|
* Insert frame sequence number (Vs) in control field before
|
* inserting into transmit window queue.
|
* inserting into transmit window queue.
|
*/
|
*/
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
skb->data[1] = I_FRAME | (self->vs << 1);
|
|
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
if (tx_skb == NULL) {
|
if (tx_skb == NULL) {
|
return;
|
return;
|
}
|
}
|
|
|
/* Insert frame in store */
|
/* Insert frame in store */
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
skb_queue_tail(&self->wx_list, skb_get(skb));
|
|
|
self->vs = (self->vs + 1) % 8;
|
self->vs = (self->vs + 1) % 8;
|
self->ack_required = FALSE;
|
self->ack_required = FALSE;
|
self->window -= 1;
|
self->window -= 1;
|
|
|
irlap_send_i_frame(self, tx_skb, RSP_FRAME);
|
irlap_send_i_frame(self, tx_skb, RSP_FRAME);
|
} else {
|
} else {
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, RSP_FRAME);
|
irlap_send_ui_frame(self, skb_get(skb), self->caddr, RSP_FRAME);
|
self->window -= 1;
|
self->window -= 1;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_resend_rejected_frames (nr)
|
* Function irlap_resend_rejected_frames (nr)
|
*
|
*
|
* Resend frames which has not been acknowledged. Should be safe to
|
* Resend frames which has not been acknowledged. Should be safe to
|
* traverse the list without locking it since this function will only be
|
* traverse the list without locking it since this function will only be
|
* called from interrupt context (BH)
|
* called from interrupt context (BH)
|
*/
|
*/
|
void irlap_resend_rejected_frames(struct irlap_cb *self, int command)
|
void irlap_resend_rejected_frames(struct irlap_cb *self, int command)
|
{
|
{
|
struct sk_buff *tx_skb;
|
struct sk_buff *tx_skb;
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
int count;
|
int count;
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
|
|
/* Initialize variables */
|
/* Initialize variables */
|
skb = tx_skb = NULL;
|
skb = tx_skb = NULL;
|
|
|
count = skb_queue_len(&self->wx_list);
|
count = skb_queue_len(&self->wx_list);
|
|
|
/* Resend unacknowledged frame(s) */
|
/* Resend unacknowledged frame(s) */
|
skb = skb_peek(&self->wx_list);
|
skb = skb_peek(&self->wx_list);
|
while (skb != NULL) {
|
while (skb != NULL) {
|
irlap_wait_min_turn_around(self, &self->qos_tx);
|
irlap_wait_min_turn_around(self, &self->qos_tx);
|
|
|
/* We copy the skb to be retransmitted since we will have to
|
/* We copy the skb to be retransmitted since we will have to
|
* modify it. Cloning will confuse packet sniffers
|
* modify it. Cloning will confuse packet sniffers
|
*/
|
*/
|
/* tx_skb = skb_clone( skb, GFP_ATOMIC); */
|
/* tx_skb = skb_clone( skb, GFP_ATOMIC); */
|
tx_skb = skb_copy(skb, GFP_ATOMIC);
|
tx_skb = skb_copy(skb, GFP_ATOMIC);
|
if (!tx_skb) {
|
if (!tx_skb) {
|
IRDA_DEBUG(0, "%s(), unable to copy\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s(), unable to copy\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
/* Unlink tx_skb from list */
|
/* Unlink tx_skb from list */
|
tx_skb->next = tx_skb->prev = NULL;
|
tx_skb->next = tx_skb->prev = NULL;
|
tx_skb->list = NULL;
|
tx_skb->list = NULL;
|
|
|
/* Clear old Nr field + poll bit */
|
/* Clear old Nr field + poll bit */
|
tx_skb->data[1] &= 0x0f;
|
tx_skb->data[1] &= 0x0f;
|
|
|
/*
|
/*
|
* Set poll bit on the last frame retransmitted
|
* Set poll bit on the last frame retransmitted
|
*/
|
*/
|
if (count-- == 1)
|
if (count-- == 1)
|
tx_skb->data[1] |= PF_BIT; /* Set p/f bit */
|
tx_skb->data[1] |= PF_BIT; /* Set p/f bit */
|
else
|
else
|
tx_skb->data[1] &= ~PF_BIT; /* Clear p/f bit */
|
tx_skb->data[1] &= ~PF_BIT; /* Clear p/f bit */
|
|
|
irlap_send_i_frame(self, tx_skb, command);
|
irlap_send_i_frame(self, tx_skb, command);
|
|
|
/*
|
/*
|
* If our skb is the last buffer in the list, then
|
* If our skb is the last buffer in the list, then
|
* we are finished, if not, move to the next sk-buffer
|
* we are finished, if not, move to the next sk-buffer
|
*/
|
*/
|
if (skb == skb_peek_tail(&self->wx_list))
|
if (skb == skb_peek_tail(&self->wx_list))
|
skb = NULL;
|
skb = NULL;
|
else
|
else
|
skb = skb->next;
|
skb = skb->next;
|
}
|
}
|
#if 0 /* Not yet */
|
#if 0 /* Not yet */
|
/*
|
/*
|
* We can now fill the window with additinal data frames
|
* We can now fill the window with additinal data frames
|
*/
|
*/
|
while (skb_queue_len( &self->txq) > 0) {
|
while (skb_queue_len( &self->txq) > 0) {
|
|
|
IRDA_DEBUG(0, "%s(), sending additional frames!\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s(), sending additional frames!\n", __FUNCTION__);
|
if ((skb_queue_len( &self->txq) > 0) &&
|
if ((skb_queue_len( &self->txq) > 0) &&
|
(self->window > 0)) {
|
(self->window > 0)) {
|
skb = skb_dequeue( &self->txq);
|
skb = skb_dequeue( &self->txq);
|
ASSERT(skb != NULL, return;);
|
ASSERT(skb != NULL, return;);
|
|
|
/*
|
/*
|
* If send window > 1 then send frame with pf
|
* If send window > 1 then send frame with pf
|
* bit cleared
|
* bit cleared
|
*/
|
*/
|
if ((self->window > 1) &&
|
if ((self->window > 1) &&
|
skb_queue_len(&self->txq) > 0)
|
skb_queue_len(&self->txq) > 0)
|
{
|
{
|
irlap_send_data_primary(self, skb);
|
irlap_send_data_primary(self, skb);
|
} else {
|
} else {
|
irlap_send_data_primary_poll(self, skb);
|
irlap_send_data_primary_poll(self, skb);
|
}
|
}
|
kfree_skb(skb);
|
kfree_skb(skb);
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
}
|
}
|
|
|
void irlap_resend_rejected_frame(struct irlap_cb *self, int command)
|
void irlap_resend_rejected_frame(struct irlap_cb *self, int command)
|
{
|
{
|
struct sk_buff *tx_skb;
|
struct sk_buff *tx_skb;
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
|
|
/* Initialize variables */
|
/* Initialize variables */
|
skb = tx_skb = NULL;
|
skb = tx_skb = NULL;
|
|
|
/* Resend unacknowledged frame(s) */
|
/* Resend unacknowledged frame(s) */
|
skb = skb_peek(&self->wx_list);
|
skb = skb_peek(&self->wx_list);
|
if (skb != NULL) {
|
if (skb != NULL) {
|
irlap_wait_min_turn_around(self, &self->qos_tx);
|
irlap_wait_min_turn_around(self, &self->qos_tx);
|
|
|
/* We copy the skb to be retransmitted since we will have to
|
/* We copy the skb to be retransmitted since we will have to
|
* modify it. Cloning will confuse packet sniffers
|
* modify it. Cloning will confuse packet sniffers
|
*/
|
*/
|
/* tx_skb = skb_clone( skb, GFP_ATOMIC); */
|
/* tx_skb = skb_clone( skb, GFP_ATOMIC); */
|
tx_skb = skb_copy(skb, GFP_ATOMIC);
|
tx_skb = skb_copy(skb, GFP_ATOMIC);
|
if (!tx_skb) {
|
if (!tx_skb) {
|
IRDA_DEBUG(0, "%s(), unable to copy\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s(), unable to copy\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
/* Unlink tx_skb from list */
|
/* Unlink tx_skb from list */
|
tx_skb->next = tx_skb->prev = NULL;
|
tx_skb->next = tx_skb->prev = NULL;
|
tx_skb->list = NULL;
|
tx_skb->list = NULL;
|
|
|
/* Clear old Nr field + poll bit */
|
/* Clear old Nr field + poll bit */
|
tx_skb->data[1] &= 0x0f;
|
tx_skb->data[1] &= 0x0f;
|
|
|
/* Set poll/final bit */
|
/* Set poll/final bit */
|
tx_skb->data[1] |= PF_BIT; /* Set p/f bit */
|
tx_skb->data[1] |= PF_BIT; /* Set p/f bit */
|
|
|
irlap_send_i_frame(self, tx_skb, command);
|
irlap_send_i_frame(self, tx_skb, command);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_ui_frame (self, skb, command)
|
* Function irlap_send_ui_frame (self, skb, command)
|
*
|
*
|
* Contruct and transmit an Unnumbered Information (UI) frame
|
* Contruct and transmit an Unnumbered Information (UI) frame
|
*
|
*
|
*/
|
*/
|
void irlap_send_ui_frame(struct irlap_cb *self, struct sk_buff *skb,
|
void irlap_send_ui_frame(struct irlap_cb *self, struct sk_buff *skb,
|
__u8 caddr, int command)
|
__u8 caddr, int command)
|
{
|
{
|
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(skb != NULL, return;);
|
ASSERT(skb != NULL, return;);
|
|
|
/* Insert connection address */
|
/* Insert connection address */
|
skb->data[0] = caddr | ((command) ? CMD_FRAME : 0);
|
skb->data[0] = caddr | ((command) ? CMD_FRAME : 0);
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_i_frame (skb)
|
* Function irlap_send_i_frame (skb)
|
*
|
*
|
* Contruct and transmit Information (I) frame
|
* Contruct and transmit Information (I) frame
|
*/
|
*/
|
void irlap_send_i_frame(struct irlap_cb *self, struct sk_buff *skb,
|
void irlap_send_i_frame(struct irlap_cb *self, struct sk_buff *skb,
|
int command)
|
int command)
|
{
|
{
|
/* Insert connection address */
|
/* Insert connection address */
|
skb->data[0] = self->caddr;
|
skb->data[0] = self->caddr;
|
skb->data[0] |= (command) ? CMD_FRAME : 0;
|
skb->data[0] |= (command) ? CMD_FRAME : 0;
|
|
|
/* Insert next to receive (Vr) */
|
/* Insert next to receive (Vr) */
|
skb->data[1] |= (self->vr << 5); /* insert nr */
|
skb->data[1] |= (self->vr << 5); /* insert nr */
|
|
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_i_frame (skb, frame)
|
* Function irlap_recv_i_frame (skb, frame)
|
*
|
*
|
* Receive and parse an I (Information) frame, no harm in making it inline
|
* Receive and parse an I (Information) frame, no harm in making it inline
|
* since it's called only from one single place (irlap_driver_rcv).
|
* since it's called only from one single place (irlap_driver_rcv).
|
*/
|
*/
|
static inline void irlap_recv_i_frame(struct irlap_cb *self,
|
static inline void irlap_recv_i_frame(struct irlap_cb *self,
|
struct sk_buff *skb,
|
struct sk_buff *skb,
|
struct irlap_info *info, int command)
|
struct irlap_info *info, int command)
|
{
|
{
|
info->nr = skb->data[1] >> 5; /* Next to receive */
|
info->nr = skb->data[1] >> 5; /* Next to receive */
|
info->pf = skb->data[1] & PF_BIT; /* Final bit */
|
info->pf = skb->data[1] & PF_BIT; /* Final bit */
|
info->ns = (skb->data[1] >> 1) & 0x07; /* Next to send */
|
info->ns = (skb->data[1] >> 1) & 0x07; /* Next to send */
|
|
|
/* Check if this is a command or a response frame */
|
/* Check if this is a command or a response frame */
|
if (command)
|
if (command)
|
irlap_do_event(self, RECV_I_CMD, skb, info);
|
irlap_do_event(self, RECV_I_CMD, skb, info);
|
else
|
else
|
irlap_do_event(self, RECV_I_RSP, skb, info);
|
irlap_do_event(self, RECV_I_RSP, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_ui_frame (self, skb, info)
|
* Function irlap_recv_ui_frame (self, skb, info)
|
*
|
*
|
* Receive and parse an Unnumbered Information (UI) frame
|
* Receive and parse an Unnumbered Information (UI) frame
|
*
|
*
|
*/
|
*/
|
static void irlap_recv_ui_frame(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_ui_frame(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info)
|
struct irlap_info *info)
|
{
|
{
|
IRDA_DEBUG( 4, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG( 4, "%s()\n", __FUNCTION__);
|
|
|
info->pf = skb->data[1] & PF_BIT; /* Final bit */
|
info->pf = skb->data[1] & PF_BIT; /* Final bit */
|
|
|
irlap_do_event(self, RECV_UI_FRAME, skb, info);
|
irlap_do_event(self, RECV_UI_FRAME, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_frmr_frame (skb, frame)
|
* Function irlap_recv_frmr_frame (skb, frame)
|
*
|
*
|
* Received Frame Reject response.
|
* Received Frame Reject response.
|
*
|
*
|
*/
|
*/
|
static void irlap_recv_frmr_frame(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_frmr_frame(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info)
|
struct irlap_info *info)
|
{
|
{
|
__u8 *frame;
|
__u8 *frame;
|
int w, x, y, z;
|
int w, x, y, z;
|
|
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
|
|
|
ASSERT(self != NULL, return;);
|
ASSERT(self != NULL, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(self->magic == LAP_MAGIC, return;);
|
ASSERT(skb != NULL, return;);
|
ASSERT(skb != NULL, return;);
|
ASSERT(info != NULL, return;);
|
ASSERT(info != NULL, return;);
|
|
|
frame = skb->data;
|
frame = skb->data;
|
|
|
info->nr = frame[2] >> 5; /* Next to receive */
|
info->nr = frame[2] >> 5; /* Next to receive */
|
info->pf = frame[2] & PF_BIT; /* Final bit */
|
info->pf = frame[2] & PF_BIT; /* Final bit */
|
info->ns = (frame[2] >> 1) & 0x07; /* Next to send */
|
info->ns = (frame[2] >> 1) & 0x07; /* Next to send */
|
|
|
w = frame[3] & 0x01;
|
w = frame[3] & 0x01;
|
x = frame[3] & 0x02;
|
x = frame[3] & 0x02;
|
y = frame[3] & 0x04;
|
y = frame[3] & 0x04;
|
z = frame[3] & 0x08;
|
z = frame[3] & 0x08;
|
|
|
if (w) {
|
if (w) {
|
IRDA_DEBUG(0, "Rejected control field is undefined or not "
|
IRDA_DEBUG(0, "Rejected control field is undefined or not "
|
"implemented.\n");
|
"implemented.\n");
|
}
|
}
|
if (x) {
|
if (x) {
|
IRDA_DEBUG(0, "Rejected control field was invalid because it "
|
IRDA_DEBUG(0, "Rejected control field was invalid because it "
|
"contained a non permitted I field.\n");
|
"contained a non permitted I field.\n");
|
}
|
}
|
if (y) {
|
if (y) {
|
IRDA_DEBUG(0, "Received I field exceeded the maximum negotiated "
|
IRDA_DEBUG(0, "Received I field exceeded the maximum negotiated "
|
"for the existing connection or exceeded the maximum "
|
"for the existing connection or exceeded the maximum "
|
"this station supports if no connection exists.\n");
|
"this station supports if no connection exists.\n");
|
}
|
}
|
if (z) {
|
if (z) {
|
IRDA_DEBUG(0, "Rejected control field control field contained an "
|
IRDA_DEBUG(0, "Rejected control field control field contained an "
|
"invalid Nr count.\n");
|
"invalid Nr count.\n");
|
}
|
}
|
irlap_do_event(self, RECV_FRMR_RSP, skb, info);
|
irlap_do_event(self, RECV_FRMR_RSP, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_send_test_frame (self, daddr)
|
* Function irlap_send_test_frame (self, daddr)
|
*
|
*
|
* Send a test frame response
|
* Send a test frame response
|
*
|
*
|
*/
|
*/
|
void irlap_send_test_frame(struct irlap_cb *self, __u8 caddr, __u32 daddr,
|
void irlap_send_test_frame(struct irlap_cb *self, __u8 caddr, __u32 daddr,
|
struct sk_buff *cmd)
|
struct sk_buff *cmd)
|
{
|
{
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
struct test_frame *frame;
|
struct test_frame *frame;
|
__u8 *info;
|
__u8 *info;
|
|
|
skb = dev_alloc_skb(cmd->len+sizeof(struct test_frame));
|
skb = dev_alloc_skb(cmd->len+sizeof(struct test_frame));
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
|
|
/* Broadcast frames must include saddr and daddr fields */
|
/* Broadcast frames must include saddr and daddr fields */
|
if (caddr == CBROADCAST) {
|
if (caddr == CBROADCAST) {
|
frame = (struct test_frame *)
|
frame = (struct test_frame *)
|
skb_put(skb, sizeof(struct test_frame));
|
skb_put(skb, sizeof(struct test_frame));
|
|
|
/* Insert the swapped addresses */
|
/* Insert the swapped addresses */
|
frame->saddr = cpu_to_le32(self->saddr);
|
frame->saddr = cpu_to_le32(self->saddr);
|
frame->daddr = cpu_to_le32(daddr);
|
frame->daddr = cpu_to_le32(daddr);
|
} else
|
} else
|
frame = (struct test_frame *) skb_put(skb, LAP_ADDR_HEADER + LAP_CTRL_HEADER);
|
frame = (struct test_frame *) skb_put(skb, LAP_ADDR_HEADER + LAP_CTRL_HEADER);
|
|
|
frame->caddr = caddr;
|
frame->caddr = caddr;
|
frame->control = TEST_RSP | PF_BIT;
|
frame->control = TEST_RSP | PF_BIT;
|
|
|
/* Copy info */
|
/* Copy info */
|
info = skb_put(skb, cmd->len);
|
info = skb_put(skb, cmd->len);
|
memcpy(info, cmd->data, cmd->len);
|
memcpy(info, cmd->data, cmd->len);
|
|
|
/* Return to sender */
|
/* Return to sender */
|
irlap_wait_min_turn_around(self, &self->qos_tx);
|
irlap_wait_min_turn_around(self, &self->qos_tx);
|
irlap_queue_xmit(self, skb);
|
irlap_queue_xmit(self, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_recv_test_frame (self, skb)
|
* Function irlap_recv_test_frame (self, skb)
|
*
|
*
|
* Receive a test frame
|
* Receive a test frame
|
*
|
*
|
*/
|
*/
|
static void irlap_recv_test_frame(struct irlap_cb *self, struct sk_buff *skb,
|
static void irlap_recv_test_frame(struct irlap_cb *self, struct sk_buff *skb,
|
struct irlap_info *info, int command)
|
struct irlap_info *info, int command)
|
{
|
{
|
struct test_frame *frame;
|
struct test_frame *frame;
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
|
|
|
frame = (struct test_frame *) skb->data;
|
frame = (struct test_frame *) skb->data;
|
|
|
/* Broadcast frames must carry saddr and daddr fields */
|
/* Broadcast frames must carry saddr and daddr fields */
|
if (info->caddr == CBROADCAST) {
|
if (info->caddr == CBROADCAST) {
|
if (skb->len < sizeof(struct test_frame)) {
|
if (skb->len < sizeof(struct test_frame)) {
|
IRDA_DEBUG(0, "%s() test frame to short!\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s() test frame to short!\n", __FUNCTION__);
|
return;
|
return;
|
}
|
}
|
|
|
/* Read and swap addresses */
|
/* Read and swap addresses */
|
info->daddr = le32_to_cpu(frame->saddr);
|
info->daddr = le32_to_cpu(frame->saddr);
|
info->saddr = le32_to_cpu(frame->daddr);
|
info->saddr = le32_to_cpu(frame->daddr);
|
|
|
/* Make sure frame is addressed to us */
|
/* Make sure frame is addressed to us */
|
if ((info->saddr != self->saddr) &&
|
if ((info->saddr != self->saddr) &&
|
(info->saddr != BROADCAST)) {
|
(info->saddr != BROADCAST)) {
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
if (command)
|
if (command)
|
irlap_do_event(self, RECV_TEST_CMD, skb, info);
|
irlap_do_event(self, RECV_TEST_CMD, skb, info);
|
else
|
else
|
irlap_do_event(self, RECV_TEST_RSP, skb, info);
|
irlap_do_event(self, RECV_TEST_RSP, skb, info);
|
}
|
}
|
|
|
/*
|
/*
|
* Function irlap_driver_rcv (skb, netdev, ptype)
|
* Function irlap_driver_rcv (skb, netdev, ptype)
|
*
|
*
|
* Called when a frame is received. Dispatches the right receive function
|
* Called when a frame is received. Dispatches the right receive function
|
* for processing of the frame.
|
* for processing of the frame.
|
*
|
*
|
*/
|
*/
|
int irlap_driver_rcv(struct sk_buff *skb, struct net_device *dev,
|
int irlap_driver_rcv(struct sk_buff *skb, struct net_device *dev,
|
struct packet_type *ptype)
|
struct packet_type *ptype)
|
{
|
{
|
struct irlap_info info;
|
struct irlap_info info;
|
struct irlap_cb *self;
|
struct irlap_cb *self;
|
int command;
|
int command;
|
__u8 control;
|
__u8 control;
|
|
|
/* FIXME: should we get our own field? */
|
/* FIXME: should we get our own field? */
|
self = (struct irlap_cb *) dev->atalk_ptr;
|
self = (struct irlap_cb *) dev->atalk_ptr;
|
|
|
/* If the net device is down, then IrLAP is gone! */
|
/* If the net device is down, then IrLAP is gone! */
|
if (!self || self->magic != LAP_MAGIC) {
|
if (!self || self->magic != LAP_MAGIC) {
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Check if frame is large enough for parsing */
|
/* Check if frame is large enough for parsing */
|
if (skb->len < 2) {
|
if (skb->len < 2) {
|
ERROR("%s(), frame to short!\n", __FUNCTION__);
|
ERROR("%s(), frame to short!\n", __FUNCTION__);
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return -1;
|
return -1;
|
}
|
}
|
|
|
command = skb->data[0] & CMD_FRAME;
|
command = skb->data[0] & CMD_FRAME;
|
info.caddr = skb->data[0] & CBROADCAST;
|
info.caddr = skb->data[0] & CBROADCAST;
|
|
|
info.pf = skb->data[1] & PF_BIT;
|
info.pf = skb->data[1] & PF_BIT;
|
info.control = skb->data[1] & ~PF_BIT; /* Mask away poll/final bit */
|
info.control = skb->data[1] & ~PF_BIT; /* Mask away poll/final bit */
|
|
|
control = info.control;
|
control = info.control;
|
|
|
/* First we check if this frame has a valid connection address */
|
/* First we check if this frame has a valid connection address */
|
if ((info.caddr != self->caddr) && (info.caddr != CBROADCAST)) {
|
if ((info.caddr != self->caddr) && (info.caddr != CBROADCAST)) {
|
IRDA_DEBUG(0, "%s(), wrong connection address!\n", __FUNCTION__);
|
IRDA_DEBUG(0, "%s(), wrong connection address!\n", __FUNCTION__);
|
goto out;
|
goto out;
|
}
|
}
|
/*
|
/*
|
* Optimize for the common case and check if the frame is an
|
* Optimize for the common case and check if the frame is an
|
* I(nformation) frame. Only I-frames have bit 0 set to 0
|
* I(nformation) frame. Only I-frames have bit 0 set to 0
|
*/
|
*/
|
if (~control & 0x01) {
|
if (~control & 0x01) {
|
irlap_recv_i_frame(self, skb, &info, command);
|
irlap_recv_i_frame(self, skb, &info, command);
|
goto out;
|
goto out;
|
}
|
}
|
/*
|
/*
|
* We now check is the frame is an S(upervisory) frame. Only
|
* We now check is the frame is an S(upervisory) frame. Only
|
* S-frames have bit 0 set to 1 and bit 1 set to 0
|
* S-frames have bit 0 set to 1 and bit 1 set to 0
|
*/
|
*/
|
if (~control & 0x02) {
|
if (~control & 0x02) {
|
/*
|
/*
|
* Received S(upervisory) frame, check which frame type it is
|
* Received S(upervisory) frame, check which frame type it is
|
* only the first nibble is of interest
|
* only the first nibble is of interest
|
*/
|
*/
|
switch (control & 0x0f) {
|
switch (control & 0x0f) {
|
case RR:
|
case RR:
|
irlap_recv_rr_frame(self, skb, &info, command);
|
irlap_recv_rr_frame(self, skb, &info, command);
|
break;
|
break;
|
case RNR:
|
case RNR:
|
irlap_recv_rnr_frame(self, skb, &info, command);
|
irlap_recv_rnr_frame(self, skb, &info, command);
|
break;
|
break;
|
case REJ:
|
case REJ:
|
irlap_recv_rej_frame(self, skb, &info, command);
|
irlap_recv_rej_frame(self, skb, &info, command);
|
break;
|
break;
|
case SREJ:
|
case SREJ:
|
irlap_recv_srej_frame(self, skb, &info, command);
|
irlap_recv_srej_frame(self, skb, &info, command);
|
break;
|
break;
|
default:
|
default:
|
WARNING("%s() Unknown S-frame %02x received!\n", __FUNCTION__,
|
WARNING("%s() Unknown S-frame %02x received!\n", __FUNCTION__,
|
info.control);
|
info.control);
|
break;
|
break;
|
}
|
}
|
goto out;
|
goto out;
|
}
|
}
|
/*
|
/*
|
* This must be a C(ontrol) frame
|
* This must be a C(ontrol) frame
|
*/
|
*/
|
switch (control) {
|
switch (control) {
|
case XID_RSP:
|
case XID_RSP:
|
irlap_recv_discovery_xid_rsp(self, skb, &info);
|
irlap_recv_discovery_xid_rsp(self, skb, &info);
|
break;
|
break;
|
case XID_CMD:
|
case XID_CMD:
|
irlap_recv_discovery_xid_cmd(self, skb, &info);
|
irlap_recv_discovery_xid_cmd(self, skb, &info);
|
break;
|
break;
|
case SNRM_CMD:
|
case SNRM_CMD:
|
irlap_recv_snrm_cmd(self, skb, &info);
|
irlap_recv_snrm_cmd(self, skb, &info);
|
break;
|
break;
|
case DM_RSP:
|
case DM_RSP:
|
irlap_do_event(self, RECV_DM_RSP, skb, &info);
|
irlap_do_event(self, RECV_DM_RSP, skb, &info);
|
break;
|
break;
|
case DISC_CMD: /* And RD_RSP since they have the same value */
|
case DISC_CMD: /* And RD_RSP since they have the same value */
|
irlap_recv_disc_frame(self, skb, &info, command);
|
irlap_recv_disc_frame(self, skb, &info, command);
|
break;
|
break;
|
case TEST_CMD:
|
case TEST_CMD:
|
irlap_recv_test_frame(self, skb, &info, command);
|
irlap_recv_test_frame(self, skb, &info, command);
|
break;
|
break;
|
case UA_RSP:
|
case UA_RSP:
|
irlap_recv_ua_frame(self, skb, &info);
|
irlap_recv_ua_frame(self, skb, &info);
|
break;
|
break;
|
case FRMR_RSP:
|
case FRMR_RSP:
|
irlap_recv_frmr_frame(self, skb, &info);
|
irlap_recv_frmr_frame(self, skb, &info);
|
break;
|
break;
|
case UI_FRAME:
|
case UI_FRAME:
|
irlap_recv_ui_frame(self, skb, &info);
|
irlap_recv_ui_frame(self, skb, &info);
|
break;
|
break;
|
default:
|
default:
|
WARNING("%s(), Unknown frame %02x received!\n", __FUNCTION__,
|
WARNING("%s(), Unknown frame %02x received!\n", __FUNCTION__,
|
info.control);
|
info.control);
|
break;
|
break;
|
}
|
}
|
out:
|
out:
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
