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Commit | Line | Data |
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1da177e4 LT |
1 | /* net/atm/raw.c - Raw AAL0 and AAL5 transports */ |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | ||
99824461 | 5 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
1da177e4 LT |
6 | |
7 | #include <linux/module.h> | |
1da177e4 | 8 | #include <linux/atmdev.h> |
4fc268d2 | 9 | #include <linux/capability.h> |
1da177e4 LT |
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 | ||
1da177e4 LT |
17 | /* |
18 | * SKB == NULL indicates that the link is being closed | |
19 | */ | |
20 | ||
fa61f0ca | 21 | static void atm_push_raw(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
22 | { |
23 | if (skb) { | |
24 | struct sock *sk = sk_atm(vcc); | |
25 | ||
26 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
27 | sk->sk_data_ready(sk, skb->len); | |
28 | } | |
29 | } | |
30 | ||
fa61f0ca | 31 | static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
32 | { |
33 | struct sock *sk = sk_atm(vcc); | |
34 | ||
99824461 JP |
35 | pr_debug("(%d) %d -= %d\n", |
36 | vcc->vci, sk_wmem_alloc_get(sk), skb->truesize); | |
1da177e4 LT |
37 | atomic_sub(skb->truesize, &sk->sk_wmem_alloc); |
38 | dev_kfree_skb_any(skb); | |
39 | sk->sk_write_space(sk); | |
40 | } | |
41 | ||
fa61f0ca | 42 | static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb) |
1da177e4 LT |
43 | { |
44 | /* | |
45 | * Note that if vpi/vci are _ANY or _UNSPEC the below will | |
46 | * still work | |
47 | */ | |
48 | if (!capable(CAP_NET_ADMIN) && | |
fa61f0ca JP |
49 | (((u32 *)skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) != |
50 | ((vcc->vpi << ATM_HDR_VPI_SHIFT) | | |
51 | (vcc->vci << ATM_HDR_VCI_SHIFT))) { | |
1da177e4 LT |
52 | kfree_skb(skb); |
53 | return -EADDRNOTAVAIL; | |
f7d57453 | 54 | } |
fa61f0ca | 55 | return vcc->dev->ops->send(vcc, skb); |
1da177e4 LT |
56 | } |
57 | ||
1da177e4 LT |
58 | int atm_init_aal0(struct atm_vcc *vcc) |
59 | { | |
60 | vcc->push = atm_push_raw; | |
61 | vcc->pop = atm_pop_raw; | |
62 | vcc->push_oam = NULL; | |
63 | vcc->send = atm_send_aal0; | |
64 | return 0; | |
65 | } | |
66 | ||
1da177e4 LT |
67 | int atm_init_aal34(struct atm_vcc *vcc) |
68 | { | |
69 | vcc->push = atm_push_raw; | |
70 | vcc->pop = atm_pop_raw; | |
71 | vcc->push_oam = NULL; | |
72 | vcc->send = vcc->dev->ops->send; | |
73 | return 0; | |
74 | } | |
75 | ||
1da177e4 LT |
76 | int atm_init_aal5(struct atm_vcc *vcc) |
77 | { | |
78 | vcc->push = atm_push_raw; | |
79 | vcc->pop = atm_pop_raw; | |
80 | vcc->push_oam = NULL; | |
81 | vcc->send = vcc->dev->ops->send; | |
82 | return 0; | |
83 | } | |
1da177e4 | 84 | EXPORT_SYMBOL(atm_init_aal5); |