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/* net/atm/raw.c - Raw AAL0 and AAL5 transports */
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
#include <linux/module.h>
#include <linux/atmdev.h>
#include <linux/capability.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
*/
static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb)
{
if (skb) {
struct sock *sk = sk_atm(vcc);
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk, skb->len);
}
}
static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb)
{
struct sock *sk = sk_atm(vcc);
DPRINTK("APopR (%d) %d -= %d\n", vcc->vci, sk->sk_wmem_alloc,
skb->truesize);
atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
dev_kfree_skb_any(skb);
sk->sk_write_space(sk);
}
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);
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