[linux-2.6-block.git] / net / atm / raw.c

/* 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);
Commit	Line	Data
1da177e4 LT	1	/* net/atm/raw.c - Raw AAL0 and AAL5 transports */
	2
	3	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	4
	5
	6	#include <linux/module.h>
1da177e4	7	#include <linux/atmdev.h>
4fc268d2	8	#include <linux/capability.h>
1da177e4 LT	9	#include <linux/kernel.h>
	10	#include <linux/skbuff.h>
	11	#include <linux/mm.h>
	12
	13	#include "common.h"
	14	#include "protocols.h"
	15
1da177e4 LT	16	/*
	17	* SKB == NULL indicates that the link is being closed
	18	*/
	19
	20	static void atm_push_raw(struct atm_vcc vcc,struct sk_buff skb)
	21	{
	22	if (skb) {
	23	struct sock *sk = sk_atm(vcc);
	24
	25	skb_queue_tail(&sk->sk_receive_queue, skb);
	26	sk->sk_data_ready(sk, skb->len);
	27	}
	28	}
	29
	30
	31	static void atm_pop_raw(struct atm_vcc vcc,struct sk_buff skb)
	32	{
	33	struct sock *sk = sk_atm(vcc);
	34
52240062 SH	35	pr_debug("APopR (%d) %d -= %d\n", vcc->vci,
52240062 SH	36	atomic_read(&sk->sk_wmem_alloc), skb->truesize);
1da177e4 LT	37	atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
	38	dev_kfree_skb_any(skb);
	39	sk->sk_write_space(sk);
	40	}
	41
	42
	43	static int atm_send_aal0(struct atm_vcc vcc,struct sk_buff skb)
	44	{
	45	/*
	46	* Note that if vpi/vci are _ANY or _UNSPEC the below will
	47	* still work
	48	*/
	49	if (!capable(CAP_NET_ADMIN) &&
f7d57453 YH	50	(((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK \| ATM_HDR_VCI_MASK)) !=
f7d57453 YH	51	((vcc->vpi << ATM_HDR_VPI_SHIFT) \| (vcc->vci << ATM_HDR_VCI_SHIFT)))
1da177e4 LT	52	{
	53	kfree_skb(skb);
	54	return -EADDRNOTAVAIL;
f7d57453	55	}
1da177e4 LT	56	return vcc->dev->ops->send(vcc,skb);
	57	}
	58
	59
	60	int atm_init_aal0(struct atm_vcc *vcc)
	61	{
	62	vcc->push = atm_push_raw;
	63	vcc->pop = atm_pop_raw;
	64	vcc->push_oam = NULL;
	65	vcc->send = atm_send_aal0;
	66	return 0;
	67	}
	68
	69
	70	int atm_init_aal34(struct atm_vcc *vcc)
	71	{
	72	vcc->push = atm_push_raw;
	73	vcc->pop = atm_pop_raw;
	74	vcc->push_oam = NULL;
	75	vcc->send = vcc->dev->ops->send;
	76	return 0;
	77	}
	78
	79
	80	int atm_init_aal5(struct atm_vcc *vcc)
	81	{
	82	vcc->push = atm_push_raw;
	83	vcc->pop = atm_pop_raw;
	84	vcc->push_oam = NULL;
	85	vcc->send = vcc->dev->ops->send;
	86	return 0;
	87	}
	88
	89
	90	EXPORT_SYMBOL(atm_init_aal5);