Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/* 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"

/*

 * 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);

        pr_debug("APopR (%d) %d -= %d\n", vcc->vci,

                atomic_read(&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);