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| 4 |
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| 5 |
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| 6 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
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| 7 |
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| 8 | #include <linux/module.h>
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| 9 | #include <linux/atmdev.h>
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| 10 | #include <linux/capability.h>
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| 11 | #include <linux/kernel.h>
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| 12 | #include <linux/skbuff.h>
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| 13 | #include <linux/mm.h>
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| 14 | #include <linux/slab.h>
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| 15 |
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| 16 | #include "common.h"
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| 17 | #include "protocols.h"
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| 18 |
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| 19 | |
| 20 | * SKB == NULL indicates that the link is being closed
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| 21 |
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| 22 |
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| 23 | static void atm_push_raw(struct atm_vcc *vcc, struct sk_buff *skb)
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| 24 | {
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| 25 | if (skb) {
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| 26 | struct sock *sk = sk_atm(vcc);
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| 27 |
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| 28 | skb_queue_tail(&sk->sk_receive_queue, skb);
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| 29 | sk->sk_data_ready(sk);
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| 30 | }
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| 31 | }
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| 32 |
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| 33 | static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb)
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| 34 | {
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| 35 | struct sock *sk = sk_atm(vcc);
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| 36 |
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| 37 | pr_debug("(%d) %d -= %d\n",
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| 38 | vcc->vci, sk_wmem_alloc_get(sk), ATM_SKB(skb)->acct_truesize);
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| 39 | atm_return_tx(vcc, skb);
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| 40 | dev_kfree_skb_any(skb);
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| 41 | sk->sk_write_space(sk);
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| 42 | }
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| 43 |
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| 44 | static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb)
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| 45 | {
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| 46 | |
| 47 | * Note that if vpi/vci are _ANY or _UNSPEC the below will
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| 48 | * still work
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| 49 |
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| 50 | if (!capable(CAP_NET_ADMIN) &&
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| 51 | (((u32 *)skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
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| 52 | ((vcc->vpi << ATM_HDR_VPI_SHIFT) |
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| 53 | (vcc->vci << ATM_HDR_VCI_SHIFT))) {
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| 54 | kfree_skb(skb);
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| 55 | return -EADDRNOTAVAIL;
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| 56 | }
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| 57 | return vcc->dev->ops->send(vcc, skb);
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| 58 | }
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| 59 |
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| 60 | int atm_init_aal0(struct atm_vcc *vcc)
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| 61 | {
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| 62 | vcc->push = atm_push_raw;
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| 63 | vcc->pop = atm_pop_raw;
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| 64 | vcc->send = atm_send_aal0;
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| 65 | return 0;
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| 66 | }
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| 67 |
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| 68 | int atm_init_aal5(struct atm_vcc *vcc)
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| 69 | {
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| 70 | vcc->push = atm_push_raw;
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| 71 | vcc->pop = atm_pop_raw;
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| 72 | vcc->send = vcc->dev->ops->send;
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| 73 | return 0;
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| 74 | }
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| 75 | EXPORT_SYMBOL(atm_init_aal5);
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