Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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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/sched.h>
8#include <linux/atmdev.h>
9#include <linux/capability.h>
10#include <linux/kernel.h>
11#include <linux/skbuff.h>
12#include <linux/mm.h>
13
14#include "common.h"
15#include "protocols.h"
16
17
18#if 0
19#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
20#else
21#define DPRINTK(format,args...)
22#endif
23
24
25/*
26 * SKB == NULL indicates that the link is being closed
27 */
28
29static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb)
30{
31 if (skb) {
32 struct sock *sk = sk_atm(vcc);
33
34 skb_queue_tail(&sk->sk_receive_queue, skb);
35 sk->sk_data_ready(sk, skb->len);
36 }
37}
38
39
40static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb)
41{
42 struct sock *sk = sk_atm(vcc);
43
44 DPRINTK("APopR (%d) %d -= %d\n", vcc->vci, sk->sk_wmem_alloc,
45 skb->truesize);
46 atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
47 dev_kfree_skb_any(skb);
48 sk->sk_write_space(sk);
49}
50
51
52static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb)
53{
54 /*
55 * Note that if vpi/vci are _ANY or _UNSPEC the below will
56 * still work
57 */
58 if (!capable(CAP_NET_ADMIN) &&
59 (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
60 ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT)))
61 {
62 kfree_skb(skb);
63 return -EADDRNOTAVAIL;
64 }
65 return vcc->dev->ops->send(vcc,skb);
66}
67
68
69int atm_init_aal0(struct atm_vcc *vcc)
70{
71 vcc->push = atm_push_raw;
72 vcc->pop = atm_pop_raw;
73 vcc->push_oam = NULL;
74 vcc->send = atm_send_aal0;
75 return 0;
76}
77
78
79int atm_init_aal34(struct atm_vcc *vcc)
80{
81 vcc->push = atm_push_raw;
82 vcc->pop = atm_pop_raw;
83 vcc->push_oam = NULL;
84 vcc->send = vcc->dev->ops->send;
85 return 0;
86}
87
88
89int atm_init_aal5(struct atm_vcc *vcc)
90{
91 vcc->push = atm_push_raw;
92 vcc->pop = atm_pop_raw;
93 vcc->push_oam = NULL;
94 vcc->send = vcc->dev->ops->send;
95 return 0;
96}
97
98
99EXPORT_SYMBOL(atm_init_aal5);