projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 1da177e4 LT |
2 | /* net/atm/raw.c - Raw AAL0 and AAL5 transports */ |
| 3 | ||
| 4 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
| 5 | ||
| 99824461 | 6 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
| 1da177e4 LT |
7 | |
| 8 | #include <linux/module.h> | |
| 1da177e4 | 9 | #include <linux/atmdev.h> |
| 4fc268d2 | 10 | #include <linux/capability.h> |
| 1da177e4 LT |
11 | #include <linux/kernel.h> |
| 12 | #include <linux/skbuff.h> | |
| 13 | #include <linux/mm.h> | |
| 5a0e3ad6 | 14 | #include <linux/slab.h> |
| 1da177e4 LT |
15 | |
| 16 | #include "common.h" | |
| 17 | #include "protocols.h" | |
| 18 | ||
| 1da177e4 LT |
19 | /* |
| 20 | * SKB == NULL indicates that the link is being closed | |
| 21 | */ | |
| 22 | ||
| fa61f0ca | 23 | static void atm_push_raw(struct atm_vcc *vcc, struct sk_buff *skb) |
| 1da177e4 LT |
24 | { |
| 25 | if (skb) { | |
| 26 | struct sock *sk = sk_atm(vcc); | |
| 27 | ||
| 28 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
| 676d2369 | 29 | sk->sk_data_ready(sk); |
| 1da177e4 LT |
30 | } |
| 31 | } | |
| 32 | ||
| fa61f0ca | 33 | static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb) |
| 1da177e4 LT |
34 | { |
| 35 | struct sock *sk = sk_atm(vcc); | |
| 36 | ||
| 99824461 | 37 | pr_debug("(%d) %d -= %d\n", |
| 9bbe60a6 DW |
38 | vcc->vci, sk_wmem_alloc_get(sk), ATM_SKB(skb)->acct_truesize); |
| 39 | WARN_ON(refcount_sub_and_test(ATM_SKB(skb)->acct_truesize, &sk->sk_wmem_alloc)); | |
| 1da177e4 LT |
40 | dev_kfree_skb_any(skb); |
| 41 | sk->sk_write_space(sk); | |
| 42 | } | |
| 43 | ||
| fa61f0ca | 44 | static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb) |
| 1da177e4 LT |
45 | { |
| 46 | /* | |
| 47 | * Note that if vpi/vci are _ANY or _UNSPEC the below will | |
| 48 | * still work | |
| 49 | */ | |
| 50 | if (!capable(CAP_NET_ADMIN) && | |
| fa61f0ca JP |
51 | (((u32 *)skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) != |
| 52 | ((vcc->vpi << ATM_HDR_VPI_SHIFT) | | |
| 53 | (vcc->vci << ATM_HDR_VCI_SHIFT))) { | |
| 1da177e4 LT |
54 | kfree_skb(skb); |
| 55 | return -EADDRNOTAVAIL; | |
| f7d57453 | 56 | } |
| f2bcc2fa SAS |
57 | if (vcc->dev->ops->send_bh) |
| 58 | return vcc->dev->ops->send_bh(vcc, skb); | |
| fa61f0ca | 59 | return vcc->dev->ops->send(vcc, skb); |
| 1da177e4 LT |
60 | } |
| 61 | ||
| 1da177e4 LT |
62 | int atm_init_aal0(struct atm_vcc *vcc) |
| 63 | { | |
| 64 | vcc->push = atm_push_raw; | |
| 65 | vcc->pop = atm_pop_raw; | |
| 66 | vcc->push_oam = NULL; | |
| 67 | vcc->send = atm_send_aal0; | |
| 68 | return 0; | |
| 69 | } | |
| 70 | ||
| 1da177e4 LT |
71 | int atm_init_aal34(struct atm_vcc *vcc) |
| 72 | { | |
| 73 | vcc->push = atm_push_raw; | |
| 74 | vcc->pop = atm_pop_raw; | |
| 75 | vcc->push_oam = NULL; | |
| f2bcc2fa SAS |
76 | if (vcc->dev->ops->send_bh) |
| 77 | vcc->send = vcc->dev->ops->send_bh; | |
| 78 | else | |
| 79 | vcc->send = vcc->dev->ops->send; | |
| 1da177e4 LT |
80 | return 0; |
| 81 | } | |
| 82 | ||
| 1da177e4 LT |
83 | int atm_init_aal5(struct atm_vcc *vcc) |
| 84 | { | |
| 85 | vcc->push = atm_push_raw; | |
| 86 | vcc->pop = atm_pop_raw; | |
| 87 | vcc->push_oam = NULL; | |
| f2bcc2fa SAS |
88 | if (vcc->dev->ops->send_bh) |
| 89 | vcc->send = vcc->dev->ops->send_bh; | |
| 90 | else | |
| 91 | vcc->send = vcc->dev->ops->send; | |
| 1da177e4 LT |
92 | return 0; |
| 93 | } | |
| 1da177e4 | 94 | EXPORT_SYMBOL(atm_init_aal5); |