raw.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /* 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 -= %dn",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);