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raw.c

Version: ~ [ 2.4.0 ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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>
  7 #include <linux/sched.h>
  8 #include <linux/atmdev.h>
  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 
 16 
 17 #if 0
 18 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
 19 #else
 20 #define DPRINTK(format,args...)
 21 #endif
 22 
 23 
 24 /*
 25  * SKB == NULL indicates that the link is being closed
 26  */
 27 
 28 void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb)
 29 {
 30         if (skb) {
 31                 skb_queue_tail(&vcc->recvq,skb);
 32                 wake_up(&vcc->sleep);
 33         }
 34 }
 35 
 36 
 37 static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb)
 38 {
 39         DPRINTK("APopR (%d) %d -= %d\n",vcc->vci,vcc->tx_inuse,skb->truesize);
 40         atomic_sub(skb->truesize+ATM_PDU_OVHD,&vcc->tx_inuse);
 41         dev_kfree_skb_any(skb);
 42         wake_up(&vcc->sleep);
 43 }
 44 
 45 
 46 static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb)
 47 {
 48         /*
 49          * Note that if vpi/vci are _ANY or _UNSPEC the below will
 50          * still work
 51          */
 52         if (!capable(CAP_NET_ADMIN) &&
 53             (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
 54             ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT)))
 55             {
 56                 kfree_skb(skb);
 57                 return -EADDRNOTAVAIL;
 58         }
 59         return vcc->dev->ops->send(vcc,skb);
 60 }
 61 
 62 
 63 int atm_init_aal0(struct atm_vcc *vcc)
 64 {
 65         vcc->push = atm_push_raw;
 66         vcc->pop = atm_pop_raw;
 67         vcc->push_oam = NULL;
 68         vcc->send = atm_send_aal0;
 69         return 0;
 70 }
 71 
 72 
 73 int atm_init_aal34(struct atm_vcc *vcc)
 74 {
 75         vcc->push = atm_push_raw;
 76         vcc->pop = atm_pop_raw;
 77         vcc->push_oam = NULL;
 78         vcc->send = vcc->dev->ops->send;
 79         return 0;
 80 }
 81 
 82 
 83 int atm_init_aal5(struct atm_vcc *vcc)
 84 {
 85         vcc->push = atm_push_raw;
 86         vcc->pop = atm_pop_raw;
 87         vcc->push_oam = NULL;
 88         vcc->send = vcc->dev->ops->send;
 89         return 0;
 90 }
 91 
 92 
 93 EXPORT_SYMBOL(atm_init_aal5);
 94

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Linux Cross Reference Linux/net/atm/raw.c

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Linux/net/atm/raw.c