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/atmdev.h> 8#include <linux/capability.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#define DPRINTK(format,args...) 18 19 20/* 21 * SKB == NULL indicates that the link is being closed 22 */ 23 24static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb) 25{ 26 if (skb) { 27 struct sock *sk = sk_atm(vcc); 28 29 skb_queue_tail(&sk->sk_receive_queue, skb); 30 sk->sk_data_ready(sk, skb->len); 31 } 32} 33 34 35static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb) 36{ 37 struct sock *sk = sk_atm(vcc); 38 39 DPRINTK("APopR (%d) %d -= %d\n", vcc->vci, sk->sk_wmem_alloc, 40 skb->truesize); 41 atomic_sub(skb->truesize, &sk->sk_wmem_alloc); 42 dev_kfree_skb_any(skb); 43 sk->sk_write_space(sk); 44} 45 46 47static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb) 48{ 49 /* 50 * Note that if vpi/vci are _ANY or _UNSPEC the below will 51 * still work 52 */ 53 if (!capable(CAP_NET_ADMIN) && 54 (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) != 55 ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT))) 56 { 57 kfree_skb(skb); 58 return -EADDRNOTAVAIL; 59 } 60 return vcc->dev->ops->send(vcc,skb); 61} 62 63 64int atm_init_aal0(struct atm_vcc *vcc) 65{ 66 vcc->push = atm_push_raw; 67 vcc->pop = atm_pop_raw; 68 vcc->push_oam = NULL; 69 vcc->send = atm_send_aal0; 70 return 0; 71} 72 73 74int atm_init_aal34(struct atm_vcc *vcc) 75{ 76 vcc->push = atm_push_raw; 77 vcc->pop = atm_pop_raw; 78 vcc->push_oam = NULL; 79 vcc->send = vcc->dev->ops->send; 80 return 0; 81} 82 83 84int atm_init_aal5(struct atm_vcc *vcc) 85{ 86 vcc->push = atm_push_raw; 87 vcc->pop = atm_pop_raw; 88 vcc->push_oam = NULL; 89 vcc->send = vcc->dev->ops->send; 90 return 0; 91} 92 93 94EXPORT_SYMBOL(atm_init_aal5); 95