Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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#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
28static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb)
29{
30 if (skb) {
31 struct sock *sk = sk_atm(vcc);
32
33 skb_queue_tail(&sk->sk_receive_queue, skb);
34 sk->sk_data_ready(sk, skb->len);
35 }
36}
37
38
39static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb)
40{
41 struct sock *sk = sk_atm(vcc);
42
43 DPRINTK("APopR (%d) %d -= %d\n", vcc->vci, sk->sk_wmem_alloc,
44 skb->truesize);
45 atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
46 dev_kfree_skb_any(skb);
47 sk->sk_write_space(sk);
48}
49
50
51static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb)
52{
53 /*
54 * Note that if vpi/vci are _ANY or _UNSPEC the below will
55 * still work
56 */
57 if (!capable(CAP_NET_ADMIN) &&
58 (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
59 ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT)))
60 {
61 kfree_skb(skb);
62 return -EADDRNOTAVAIL;
63 }
64 return vcc->dev->ops->send(vcc,skb);
65}
66
67
68int atm_init_aal0(struct atm_vcc *vcc)
69{
70 vcc->push = atm_push_raw;
71 vcc->pop = atm_pop_raw;
72 vcc->push_oam = NULL;
73 vcc->send = atm_send_aal0;
74 return 0;
75}
76
77
78int atm_init_aal34(struct atm_vcc *vcc)
79{
80 vcc->push = atm_push_raw;
81 vcc->pop = atm_pop_raw;
82 vcc->push_oam = NULL;
83 vcc->send = vcc->dev->ops->send;
84 return 0;
85}
86
87
88int atm_init_aal5(struct atm_vcc *vcc)
89{
90 vcc->push = atm_push_raw;
91 vcc->pop = atm_pop_raw;
92 vcc->push_oam = NULL;
93 vcc->send = vcc->dev->ops->send;
94 return 0;
95}
96
97
98EXPORT_SYMBOL(atm_init_aal5);