Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/net/atm/raw.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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File size: 1944 byte(s)
Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 1944 byte(s)
Tag kernel26-2.6.12-alx-r9
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 | static 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 | |
39 | static 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 | |
51 | static 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 | |
68 | int 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 | |
78 | int 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 | |
88 | int 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 | |
98 | EXPORT_SYMBOL(atm_init_aal5); |