Viewing file:  raw.c (1.8 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* net/atm/raw.c - Raw AAL0 and AAL5 transports */
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/atmdev.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include "common.h"
#include "protocols.h"
#if 0
#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
#else
#define DPRINTK(format,args...)
#endif
/*
* SKB == NULL indicates that the link is being closed
*/
void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb)
{
if (skb) {
skb_queue_tail(&vcc->recvq,skb);
wake_up(&vcc->sleep);
}
}
static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb)
{
DPRINTK("APopR (%d) %d -= %d\n",vcc->vci,vcc->tx_inuse,skb->truesize);
atomic_sub(skb->truesize+ATM_PDU_OVHD,&vcc->tx_inuse);
dev_kfree_skb_any(skb);
wake_up(&vcc->sleep);
}
static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb)
{
/*
* Note that if vpi/vci are _ANY or _UNSPEC the below will
* still work
*/
if (!capable(CAP_NET_ADMIN) &&
(((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT)))
{
kfree_skb(skb);
return -EADDRNOTAVAIL;
}
return vcc->dev->ops->send(vcc,skb);
}
int atm_init_aal0(struct atm_vcc *vcc)
{
vcc->push = atm_push_raw;
vcc->pop = atm_pop_raw;
vcc->push_oam = NULL;
vcc->send = atm_send_aal0;
return 0;
}
int atm_init_aal34(struct atm_vcc *vcc)
{
vcc->push = atm_push_raw;
vcc->pop = atm_pop_raw;
vcc->push_oam = NULL;
vcc->send = vcc->dev->ops->send;
return 0;
}
int atm_init_aal5(struct atm_vcc *vcc)
{
vcc->push = atm_push_raw;
vcc->pop = atm_pop_raw;
vcc->push_oam = NULL;
vcc->send = vcc->dev->ops->send;
return 0;
}
EXPORT_SYMBOL(atm_init_aal5);
|